libvirt-domain.c 388.3 KB
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/*
 * libvirt-domain.c: entry points for virDomainPtr APIs
 *
4
 * Copyright (C) 2006-2015 Red Hat, Inc.
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 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library.  If not, see
 * <http://www.gnu.org/licenses/>.
 */

#include <config.h>
#include <sys/stat.h>

#include "intprops.h"

#include "datatypes.h"
#include "viralloc.h"
#include "virfile.h"
#include "virlog.h"
#include "virtypedparam.h"

VIR_LOG_INIT("libvirt.domain");

#define VIR_FROM_THIS VIR_FROM_DOMAIN


/**
 * virConnectListDomains:
 * @conn: pointer to the hypervisor connection
 * @ids: array to collect the list of IDs of active domains
 * @maxids: size of @ids
 *
 * Collect the list of active domains, and store their IDs in array @ids
 *
 * For inactive domains, see virConnectListDefinedDomains().  For more
 * control over the results, see virConnectListAllDomains().
 *
 * Returns the number of domains found or -1 in case of error.  Note that
 * this command is inherently racy; a domain can be started between a
 * call to virConnectNumOfDomains() and this call; you are only guaranteed
 * that all currently active domains were listed if the return is less
 * than @maxids.
 */
int
virConnectListDomains(virConnectPtr conn, int *ids, int maxids)
{
    VIR_DEBUG("conn=%p, ids=%p, maxids=%d", conn, ids, maxids);

    virResetLastError();

    virCheckConnectReturn(conn, -1);
    virCheckNonNullArgGoto(ids, error);
    virCheckNonNegativeArgGoto(maxids, error);

    if (conn->driver->connectListDomains) {
        int ret = conn->driver->connectListDomains(conn, ids, maxids);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();
 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virConnectNumOfDomains:
 * @conn: pointer to the hypervisor connection
 *
 * Provides the number of active domains.
 *
 * Returns the number of domain found or -1 in case of error
 */
int
virConnectNumOfDomains(virConnectPtr conn)
{
    VIR_DEBUG("conn=%p", conn);

    virResetLastError();

    virCheckConnectReturn(conn, -1);

    if (conn->driver->connectNumOfDomains) {
        int ret = conn->driver->connectNumOfDomains(conn);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();
 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virDomainGetConnect:
 * @dom: pointer to a domain
 *
 * Provides the connection pointer associated with a domain.  The
 * reference counter on the connection is not increased by this
 * call.
 *
 * Returns the virConnectPtr or NULL in case of failure.
 */
virConnectPtr
virDomainGetConnect(virDomainPtr dom)
{
    VIR_DOMAIN_DEBUG(dom);

    virResetLastError();

    virCheckDomainReturn(dom, NULL);

    return dom->conn;
}


/**
 * virDomainCreateXML:
 * @conn: pointer to the hypervisor connection
 * @xmlDesc: string containing an XML description of the domain
 * @flags: bitwise-OR of supported virDomainCreateFlags
 *
 * Launch a new guest domain, based on an XML description similar
 * to the one returned by virDomainGetXMLDesc()
 * This function may require privileged access to the hypervisor.
 * The domain is not persistent, so its definition will disappear when it
 * is destroyed, or if the host is restarted (see virDomainDefineXML() to
 * define persistent domains).
 *
 * If the VIR_DOMAIN_START_PAUSED flag is set, the guest domain
 * will be started, but its CPUs will remain paused. The CPUs
 * can later be manually started using virDomainResume.
 *
 * If the VIR_DOMAIN_START_AUTODESTROY flag is set, the guest
 * domain will be automatically destroyed when the virConnectPtr
 * object is finally released. This will also happen if the
 * client application crashes / loses its connection to the
 * libvirtd daemon. Any domains marked for auto destroy will
 * block attempts at migration, save-to-file, or snapshots.
 *
 * virDomainFree should be used to free the resources after the
 * domain object is no longer needed.
 *
 * Returns a new domain object or NULL in case of failure
 */
virDomainPtr
virDomainCreateXML(virConnectPtr conn, const char *xmlDesc,
                   unsigned int flags)
{
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    VIR_DEBUG("conn=%p, xmlDesc=%s, flags=%x", conn, NULLSTR(xmlDesc), flags);
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    virResetLastError();

    virCheckConnectReturn(conn, NULL);
    virCheckNonNullArgGoto(xmlDesc, error);
    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainCreateXML) {
        virDomainPtr ret;
        ret = conn->driver->domainCreateXML(conn, xmlDesc, flags);
        if (!ret)
            goto error;
        return ret;
    }

    virReportUnsupportedError();
 error:
    virDispatchError(conn);
    return NULL;
}


/**
 * virDomainCreateXMLWithFiles:
 * @conn: pointer to the hypervisor connection
 * @xmlDesc: string containing an XML description of the domain
 * @nfiles: number of file descriptors passed
 * @files: list of file descriptors passed
 * @flags: bitwise-OR of supported virDomainCreateFlags
 *
 * Launch a new guest domain, based on an XML description similar
 * to the one returned by virDomainGetXMLDesc()
 * This function may require privileged access to the hypervisor.
 * The domain is not persistent, so its definition will disappear when it
 * is destroyed, or if the host is restarted (see virDomainDefineXML() to
 * define persistent domains).
 *
 * @files provides an array of file descriptors which will be
 * made available to the 'init' process of the guest. The file
 * handles exposed to the guest will be renumbered to start
 * from 3 (ie immediately following stderr). This is only
 * supported for guests which use container based virtualization
 * technology.
 *
 * If the VIR_DOMAIN_START_PAUSED flag is set, the guest domain
 * will be started, but its CPUs will remain paused. The CPUs
 * can later be manually started using virDomainResume.
 *
 * If the VIR_DOMAIN_START_AUTODESTROY flag is set, the guest
 * domain will be automatically destroyed when the virConnectPtr
 * object is finally released. This will also happen if the
 * client application crashes / loses its connection to the
 * libvirtd daemon. Any domains marked for auto destroy will
 * block attempts at migration, save-to-file, or snapshots.
 *
 * virDomainFree should be used to free the resources after the
 * domain object is no longer needed.
 *
 * Returns a new domain object or NULL in case of failure
 */
virDomainPtr
virDomainCreateXMLWithFiles(virConnectPtr conn, const char *xmlDesc,
                            unsigned int nfiles,
                            int *files,
                            unsigned int flags)
{
    VIR_DEBUG("conn=%p, xmlDesc=%s, nfiles=%u, files=%p, flags=%x",
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              conn, NULLSTR(xmlDesc), nfiles, files, flags);
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    virResetLastError();

    virCheckConnectReturn(conn, NULL);
    virCheckNonNullArgGoto(xmlDesc, error);
    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainCreateXMLWithFiles) {
        virDomainPtr ret;
        ret = conn->driver->domainCreateXMLWithFiles(conn, xmlDesc,
                                                     nfiles, files,
                                                     flags);
        if (!ret)
            goto error;
        return ret;
    }

    virReportUnsupportedError();
 error:
    virDispatchError(conn);
    return NULL;
}


/**
 * virDomainCreateLinux:
 * @conn: pointer to the hypervisor connection
 * @xmlDesc: string containing an XML description of the domain
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Deprecated after 0.4.6.
 * Renamed to virDomainCreateXML() providing identical functionality.
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 * This existing name will be left indefinitely for API compatibility.
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 *
 * Returns a new domain object or NULL in case of failure
 */
virDomainPtr
virDomainCreateLinux(virConnectPtr conn, const char *xmlDesc,
                     unsigned int flags)
{
    return virDomainCreateXML(conn, xmlDesc, flags);
}


/**
 * virDomainLookupByID:
 * @conn: pointer to the hypervisor connection
 * @id: the domain ID number
 *
 * Try to find a domain based on the hypervisor ID number
 * Note that this won't work for inactive domains which have an ID of -1,
 * in that case a lookup based on the Name or UUId need to be done instead.
 *
 * virDomainFree should be used to free the resources after the
 * domain object is no longer needed.
 *
 * Returns a new domain object or NULL in case of failure.  If the
 * domain cannot be found, then VIR_ERR_NO_DOMAIN error is raised.
 */
virDomainPtr
virDomainLookupByID(virConnectPtr conn, int id)
{
    VIR_DEBUG("conn=%p, id=%d", conn, id);

    virResetLastError();

    virCheckConnectReturn(conn, NULL);
    virCheckNonNegativeArgGoto(id, error);

    if (conn->driver->domainLookupByID) {
        virDomainPtr ret;
        ret = conn->driver->domainLookupByID(conn, id);
        if (!ret)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return NULL;
}


/**
 * virDomainLookupByUUID:
 * @conn: pointer to the hypervisor connection
 * @uuid: the raw UUID for the domain
 *
 * Try to lookup a domain on the given hypervisor based on its UUID.
 *
 * virDomainFree should be used to free the resources after the
 * domain object is no longer needed.
 *
 * Returns a new domain object or NULL in case of failure.  If the
 * domain cannot be found, then VIR_ERR_NO_DOMAIN error is raised.
 */
virDomainPtr
virDomainLookupByUUID(virConnectPtr conn, const unsigned char *uuid)
{
    VIR_UUID_DEBUG(conn, uuid);

    virResetLastError();

    virCheckConnectReturn(conn, NULL);
    virCheckNonNullArgGoto(uuid, error);

    if (conn->driver->domainLookupByUUID) {
        virDomainPtr ret;
        ret = conn->driver->domainLookupByUUID(conn, uuid);
        if (!ret)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return NULL;
}


/**
 * virDomainLookupByUUIDString:
 * @conn: pointer to the hypervisor connection
 * @uuidstr: the string UUID for the domain
 *
 * Try to lookup a domain on the given hypervisor based on its UUID.
 *
 * virDomainFree should be used to free the resources after the
 * domain object is no longer needed.
 *
 * Returns a new domain object or NULL in case of failure.  If the
 * domain cannot be found, then VIR_ERR_NO_DOMAIN error is raised.
 */
virDomainPtr
virDomainLookupByUUIDString(virConnectPtr conn, const char *uuidstr)
{
    unsigned char uuid[VIR_UUID_BUFLEN];
    VIR_DEBUG("conn=%p, uuidstr=%s", conn, NULLSTR(uuidstr));

    virResetLastError();

    virCheckConnectReturn(conn, NULL);
    virCheckNonNullArgGoto(uuidstr, error);

    if (virUUIDParse(uuidstr, uuid) < 0) {
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        virReportInvalidArg(uuidstr, "%s", _("Invalid UUID"));
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        goto error;
    }

    return virDomainLookupByUUID(conn, &uuid[0]);

 error:
    virDispatchError(conn);
    return NULL;
}


/**
 * virDomainLookupByName:
 * @conn: pointer to the hypervisor connection
 * @name: name for the domain
 *
 * Try to lookup a domain on the given hypervisor based on its name.
 *
 * virDomainFree should be used to free the resources after the
 * domain object is no longer needed.
 *
 * Returns a new domain object or NULL in case of failure.  If the
 * domain cannot be found, then VIR_ERR_NO_DOMAIN error is raised.
 */
virDomainPtr
virDomainLookupByName(virConnectPtr conn, const char *name)
{
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    VIR_DEBUG("conn=%p, name=%s", conn, NULLSTR(name));
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    virResetLastError();

    virCheckConnectReturn(conn, NULL);
    virCheckNonNullArgGoto(name, error);

    if (conn->driver->domainLookupByName) {
        virDomainPtr dom;
        dom = conn->driver->domainLookupByName(conn, name);
        if (!dom)
            goto error;
        return dom;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return NULL;
}


/**
 * virDomainDestroy:
 * @domain: a domain object
 *
 * Destroy the domain object. The running instance is shutdown if not down
 * already and all resources used by it are given back to the hypervisor. This
 * does not free the associated virDomainPtr object.
 * This function may require privileged access.
 *
 * virDomainDestroy first requests that a guest terminate
 * (e.g. SIGTERM), then waits for it to comply. After a reasonable
 * timeout, if the guest still exists, virDomainDestroy will
 * forcefully terminate the guest (e.g. SIGKILL) if necessary (which
 * may produce undesirable results, for example unflushed disk cache
 * in the guest). To avoid this possibility, it's recommended to
 * instead call virDomainDestroyFlags, sending the
 * VIR_DOMAIN_DESTROY_GRACEFUL flag.
 *
 * If the domain is transient and has any snapshot metadata (see
 * virDomainSnapshotNum()), then that metadata will automatically
 * be deleted when the domain quits.
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainDestroy(virDomainPtr domain)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainDestroy) {
        int ret;
        ret = conn->driver->domainDestroy(domain);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virDomainDestroyFlags:
 * @domain: a domain object
 * @flags: bitwise-OR of virDomainDestroyFlagsValues
 *
 * Destroy the domain object. The running instance is shutdown if not down
 * already and all resources used by it are given back to the hypervisor.
 * This does not free the associated virDomainPtr object.
 * This function may require privileged access.
 *
 * Calling this function with no @flags set (equal to zero) is
 * equivalent to calling virDomainDestroy, and after a reasonable
 * timeout will forcefully terminate the guest (e.g. SIGKILL) if
 * necessary (which may produce undesirable results, for example
 * unflushed disk cache in the guest). Including
 * VIR_DOMAIN_DESTROY_GRACEFUL in the flags will prevent the forceful
 * termination of the guest, and virDomainDestroyFlags will instead
 * return an error if the guest doesn't terminate by the end of the
 * timeout; at that time, the management application can decide if
 * calling again without VIR_DOMAIN_DESTROY_GRACEFUL is appropriate.
 *
 * Another alternative which may produce cleaner results for the
 * guest's disks is to use virDomainShutdown() instead, but that
 * depends on guest support (some hypervisor/guest combinations may
 * ignore the shutdown request).
 *
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainDestroyFlags(virDomainPtr domain,
                      unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainDestroyFlags) {
        int ret;
        ret = conn->driver->domainDestroyFlags(domain, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virDomainFree:
 * @domain: a domain object
 *
 * Free the domain object. The running instance is kept alive.
 * The data structure is freed and should not be used thereafter.
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainFree(virDomainPtr domain)
{
    VIR_DOMAIN_DEBUG(domain);

    virResetLastError();

    virCheckDomainReturn(domain, -1);

    virObjectUnref(domain);
    return 0;
}


/**
 * virDomainRef:
 * @domain: the domain to hold a reference on
 *
 * Increment the reference count on the domain. For each
 * additional call to this method, there shall be a corresponding
 * call to virDomainFree to release the reference count, once
 * the caller no longer needs the reference to this object.
 *
 * This method is typically useful for applications where multiple
 * threads are using a connection, and it is required that the
 * connection remain open until all threads have finished using
 * it. ie, each new thread using a domain would increment
 * the reference count.
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainRef(virDomainPtr domain)
{
    VIR_DOMAIN_DEBUG(domain, "refs=%d", domain ? domain->object.u.s.refs : 0);

    virResetLastError();

    virCheckDomainReturn(domain, -1);

    virObjectRef(domain);
    return 0;
}


/**
 * virDomainSuspend:
 * @domain: a domain object
 *
 * Suspends an active domain, the process is frozen without further access
 * to CPU resources and I/O but the memory used by the domain at the
 * hypervisor level will stay allocated. Use virDomainResume() to reactivate
 * the domain.
 * This function may require privileged access.
 * Moreover, suspend may not be supported if domain is in some
 * special state like VIR_DOMAIN_PMSUSPENDED.
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainSuspend(virDomainPtr domain)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainSuspend) {
        int ret;
        ret = conn->driver->domainSuspend(domain);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainResume:
 * @domain: a domain object
 *
 * Resume a suspended domain, the process is restarted from the state where
 * it was frozen by calling virDomainSuspend().
 * This function may require privileged access
 * Moreover, resume may not be supported if domain is in some
 * special state like VIR_DOMAIN_PMSUSPENDED.
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainResume(virDomainPtr domain)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainResume) {
        int ret;
        ret = conn->driver->domainResume(domain);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainPMSuspendForDuration:
 * @dom: a domain object
 * @target: a value from virNodeSuspendTarget
 * @duration: duration in seconds to suspend, or 0 for indefinite
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Attempt to have the guest enter the given @target power management
 * suspension level.  If @duration is non-zero, also schedule the guest to
 * resume normal operation after that many seconds, if nothing else has
 * resumed it earlier.  Some hypervisors require that @duration be 0, for
 * an indefinite suspension.
 *
 * Dependent on hypervisor used, this may require a
 * guest agent to be available, e.g. QEMU.
 *
 * Beware that at least for QEMU, the domain's process will be terminated
 * when VIR_NODE_SUSPEND_TARGET_DISK is used and a new process will be
 * launched when libvirt is asked to wake up the domain. As a result of
 * this, any runtime changes, such as device hotplug or memory settings,
 * are lost unless such changes were made with VIR_DOMAIN_AFFECT_CONFIG
 * flag.
 *
 * Returns: 0 on success,
 *          -1 on failure.
 */
int
virDomainPMSuspendForDuration(virDomainPtr dom,
                              unsigned int target,
                              unsigned long long duration,
                              unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(dom, "target=%u duration=%llu flags=%x",
                     target, duration, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    conn = dom->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainPMSuspendForDuration) {
        int ret;
        ret = conn->driver->domainPMSuspendForDuration(dom, target,
                                                       duration, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virDomainPMWakeup:
 * @dom: a domain object
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Inject a wakeup into the guest that previously used
 * virDomainPMSuspendForDuration, rather than waiting for the
 * previously requested duration (if any) to elapse.
 *
 * Returns: 0 on success,
 *          -1 on failure.
 */
int
virDomainPMWakeup(virDomainPtr dom,
                  unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(dom, "flags=%x", flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    conn = dom->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainPMWakeup) {
        int ret;
        ret = conn->driver->domainPMWakeup(dom, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virDomainSave:
 * @domain: a domain object
 * @to: path for the output file
 *
 * This method will suspend a domain and save its memory contents to
 * a file on disk. After the call, if successful, the domain is not
 * listed as running anymore (this ends the life of a transient domain).
 * Use virDomainRestore() to restore a domain after saving.
 *
 * See virDomainSaveFlags() for more control.  Also, a save file can
 * be inspected or modified slightly with virDomainSaveImageGetXMLDesc()
 * and virDomainSaveImageDefineXML().
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainSave(virDomainPtr domain, const char *to)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "to=%s", to);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(to, error);

    if (conn->driver->domainSave) {
        int ret;
        char *absolute_to;

        /* We must absolutize the file path as the save is done out of process */
        if (virFileAbsPath(to, &absolute_to) < 0) {
            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                           _("could not build absolute output file path"));
            goto error;
        }

        ret = conn->driver->domainSave(domain, absolute_to);

        VIR_FREE(absolute_to);

        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainSaveFlags:
 * @domain: a domain object
 * @to: path for the output file
 * @dxml: (optional) XML config for adjusting guest xml used on restore
 * @flags: bitwise-OR of virDomainSaveRestoreFlags
 *
 * This method will suspend a domain and save its memory contents to
 * a file on disk. After the call, if successful, the domain is not
 * listed as running anymore (this ends the life of a transient domain).
 * Use virDomainRestore() to restore a domain after saving.
 *
 * If the hypervisor supports it, @dxml can be used to alter
 * host-specific portions of the domain XML that will be used when
 * restoring an image.  For example, it is possible to alter the
 * backing filename that is associated with a disk device, in order to
 * prepare for file renaming done as part of backing up the disk
 * device while the domain is stopped.
 *
 * If @flags includes VIR_DOMAIN_SAVE_BYPASS_CACHE, then libvirt will
 * attempt to bypass the file system cache while creating the file, or
 * fail if it cannot do so for the given system; this can allow less
 * pressure on file system cache, but also risks slowing saves to NFS.
 *
 * Normally, the saved state file will remember whether the domain was
 * running or paused, and restore defaults to the same state.
 * Specifying VIR_DOMAIN_SAVE_RUNNING or VIR_DOMAIN_SAVE_PAUSED in
 * @flags will override what state gets saved into the file.  These
 * two flags are mutually exclusive.
 *
 * A save file can be inspected or modified slightly with
 * virDomainSaveImageGetXMLDesc() and virDomainSaveImageDefineXML().
 *
 * Some hypervisors may prevent this operation if there is a current
 * block copy operation; in that case, use virDomainBlockJobAbort()
 * to stop the block copy first.
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainSaveFlags(virDomainPtr domain, const char *to,
                   const char *dxml, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "to=%s, dxml=%s, flags=%x",
                     to, NULLSTR(dxml), flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(to, error);

908 909 910
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_SAVE_RUNNING,
                             VIR_DOMAIN_SAVE_PAUSED,
                             error);
911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953

    if (conn->driver->domainSaveFlags) {
        int ret;
        char *absolute_to;

        /* We must absolutize the file path as the save is done out of process */
        if (virFileAbsPath(to, &absolute_to) < 0) {
            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                           _("could not build absolute output file path"));
            goto error;
        }

        ret = conn->driver->domainSaveFlags(domain, absolute_to, dxml, flags);

        VIR_FREE(absolute_to);

        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainRestore:
 * @conn: pointer to the hypervisor connection
 * @from: path to the input file
 *
 * This method will restore a domain saved to disk by virDomainSave().
 *
 * See virDomainRestoreFlags() for more control.
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainRestore(virConnectPtr conn, const char *from)
{
954
    VIR_DEBUG("conn=%p, from=%s", conn, NULLSTR(from));
955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023

    virResetLastError();

    virCheckConnectReturn(conn, -1);
    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(from, error);

    if (conn->driver->domainRestore) {
        int ret;
        char *absolute_from;

        /* We must absolutize the file path as the restore is done out of process */
        if (virFileAbsPath(from, &absolute_from) < 0) {
            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                           _("could not build absolute input file path"));
            goto error;
        }

        ret = conn->driver->domainRestore(conn, absolute_from);

        VIR_FREE(absolute_from);

        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virDomainRestoreFlags:
 * @conn: pointer to the hypervisor connection
 * @from: path to the input file
 * @dxml: (optional) XML config for adjusting guest xml used on restore
 * @flags: bitwise-OR of virDomainSaveRestoreFlags
 *
 * This method will restore a domain saved to disk by virDomainSave().
 *
 * If the hypervisor supports it, @dxml can be used to alter
 * host-specific portions of the domain XML that will be used when
 * restoring an image.  For example, it is possible to alter the
 * backing filename that is associated with a disk device, in order to
 * prepare for file renaming done as part of backing up the disk
 * device while the domain is stopped.
 *
 * If @flags includes VIR_DOMAIN_SAVE_BYPASS_CACHE, then libvirt will
 * attempt to bypass the file system cache while restoring the file, or
 * fail if it cannot do so for the given system; this can allow less
 * pressure on file system cache, but also risks slowing restores from NFS.
 *
 * Normally, the saved state file will remember whether the domain was
 * running or paused, and restore defaults to the same state.
 * Specifying VIR_DOMAIN_SAVE_RUNNING or VIR_DOMAIN_SAVE_PAUSED in
 * @flags will override the default read from the file.  These two
 * flags are mutually exclusive.
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainRestoreFlags(virConnectPtr conn, const char *from, const char *dxml,
                      unsigned int flags)
{
    VIR_DEBUG("conn=%p, from=%s, dxml=%s, flags=%x",
1024
              conn, NULLSTR(from), NULLSTR(dxml), flags);
1025 1026 1027 1028 1029 1030 1031

    virResetLastError();

    virCheckConnectReturn(conn, -1);
    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(from, error);

1032 1033 1034
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_SAVE_RUNNING,
                             VIR_DOMAIN_SAVE_PAUSED,
                             error);
1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087

    if (conn->driver->domainRestoreFlags) {
        int ret;
        char *absolute_from;

        /* We must absolutize the file path as the restore is done out of process */
        if (virFileAbsPath(from, &absolute_from) < 0) {
            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                           _("could not build absolute input file path"));
            goto error;
        }

        ret = conn->driver->domainRestoreFlags(conn, absolute_from, dxml,
                                               flags);

        VIR_FREE(absolute_from);

        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virDomainSaveImageGetXMLDesc:
 * @conn: pointer to the hypervisor connection
 * @file: path to saved state file
 * @flags: bitwise-OR of subset of virDomainXMLFlags
 *
 * This method will extract the XML describing the domain at the time
 * a saved state file was created.  @file must be a file created
 * previously by virDomainSave() or virDomainSaveFlags().
 *
 * No security-sensitive data will be included unless @flags contains
 * VIR_DOMAIN_XML_SECURE; this flag is rejected on read-only
 * connections.  For this API, @flags should not contain either
 * VIR_DOMAIN_XML_INACTIVE or VIR_DOMAIN_XML_UPDATE_CPU.
 *
 * Returns a 0 terminated UTF-8 encoded XML instance, or NULL in case of
 * error.  The caller must free() the returned value.
 */
char *
virDomainSaveImageGetXMLDesc(virConnectPtr conn, const char *file,
                             unsigned int flags)
{
    VIR_DEBUG("conn=%p, file=%s, flags=%x",
1088
              conn, NULLSTR(file), flags);
1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160

    virResetLastError();

    virCheckConnectReturn(conn, NULL);
    virCheckNonNullArgGoto(file, error);

    if ((conn->flags & VIR_CONNECT_RO) && (flags & VIR_DOMAIN_XML_SECURE)) {
        virReportError(VIR_ERR_OPERATION_DENIED, "%s",
                       _("virDomainSaveImageGetXMLDesc with secure flag"));
        goto error;
    }

    if (conn->driver->domainSaveImageGetXMLDesc) {
        char *ret;
        char *absolute_file;

        /* We must absolutize the file path as the read is done out of process */
        if (virFileAbsPath(file, &absolute_file) < 0) {
            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                           _("could not build absolute input file path"));
            goto error;
        }

        ret = conn->driver->domainSaveImageGetXMLDesc(conn, absolute_file,
                                                      flags);

        VIR_FREE(absolute_file);

        if (!ret)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return NULL;
}


/**
 * virDomainSaveImageDefineXML:
 * @conn: pointer to the hypervisor connection
 * @file: path to saved state file
 * @dxml: XML config for adjusting guest xml used on restore
 * @flags: bitwise-OR of virDomainSaveRestoreFlags
 *
 * This updates the definition of a domain stored in a saved state
 * file.  @file must be a file created previously by virDomainSave()
 * or virDomainSaveFlags().
 *
 * @dxml can be used to alter host-specific portions of the domain XML
 * that will be used when restoring an image.  For example, it is
 * possible to alter the backing filename that is associated with a
 * disk device, to match renaming done as part of backing up the disk
 * device while the domain is stopped.
 *
 * Normally, the saved state file will remember whether the domain was
 * running or paused, and restore defaults to the same state.
 * Specifying VIR_DOMAIN_SAVE_RUNNING or VIR_DOMAIN_SAVE_PAUSED in
 * @flags will override the default saved into the file; omitting both
 * leaves the file's default unchanged.  These two flags are mutually
 * exclusive.
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainSaveImageDefineXML(virConnectPtr conn, const char *file,
                            const char *dxml, unsigned int flags)
{
    VIR_DEBUG("conn=%p, file=%s, dxml=%s, flags=%x",
1161
              conn, NULLSTR(file), NULLSTR(dxml), flags);
1162 1163 1164 1165 1166 1167 1168 1169

    virResetLastError();

    virCheckConnectReturn(conn, -1);
    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(file, error);
    virCheckNonNullArgGoto(dxml, error);

1170 1171 1172
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_SAVE_RUNNING,
                             VIR_DOMAIN_SAVE_PAUSED,
                             error);
1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244

    if (conn->driver->domainSaveImageDefineXML) {
        int ret;
        char *absolute_file;

        /* We must absolutize the file path as the read is done out of process */
        if (virFileAbsPath(file, &absolute_file) < 0) {
            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                           _("could not build absolute input file path"));
            goto error;
        }

        ret = conn->driver->domainSaveImageDefineXML(conn, absolute_file,
                                                     dxml, flags);

        VIR_FREE(absolute_file);

        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virDomainCoreDump:
 * @domain: a domain object
 * @to: path for the core file
 * @flags: bitwise-OR of virDomainCoreDumpFlags
 *
 * This method will dump the core of a domain on a given file for analysis.
 * Note that for remote Xen Daemon the file path will be interpreted in
 * the remote host. Hypervisors may require  the user to manually ensure
 * proper permissions on the file named by @to.
 *
 * If @flags includes VIR_DUMP_CRASH, then leave the guest shut off with
 * a crashed state after the dump completes.  If @flags includes
 * VIR_DUMP_LIVE, then make the core dump while continuing to allow
 * the guest to run; otherwise, the guest is suspended during the dump.
 * VIR_DUMP_RESET flag forces reset of the guest after dump.
 * The above three flags are mutually exclusive.
 *
 * Additionally, if @flags includes VIR_DUMP_BYPASS_CACHE, then libvirt
 * will attempt to bypass the file system cache while creating the file,
 * or fail if it cannot do so for the given system; this can allow less
 * pressure on file system cache, but also risks slowing saves to NFS.
 *
 * For more control over the output format, see virDomainCoreDumpWithFormat().
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainCoreDump(virDomainPtr domain, const char *to, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "to=%s, flags=%x", to, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(to, error);

1245 1246 1247
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DUMP_CRASH, VIR_DUMP_LIVE, error);
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DUMP_CRASH, VIR_DUMP_RESET, error);
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DUMP_LIVE, VIR_DUMP_RESET, error);
1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279

    if (conn->driver->domainCoreDump) {
        int ret;
        char *absolute_to;

        /* We must absolutize the file path as the save is done out of process */
        if (virFileAbsPath(to, &absolute_to) < 0) {
            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                           _("could not build absolute core file path"));
            goto error;
        }

        ret = conn->driver->domainCoreDump(domain, absolute_to, flags);

        VIR_FREE(absolute_to);

        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}

/**
 * virDomainCoreDumpWithFormat:
 * @domain: a domain object
 * @to: path for the core file
1280
 * @dumpformat: format of domain memory's dump (one of virDomainCoreDumpFormat enum)
1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328
 * @flags: bitwise-OR of virDomainCoreDumpFlags
 *
 * This method will dump the core of a domain on a given file for analysis.
 * Note that for remote Xen Daemon the file path will be interpreted in
 * the remote host. Hypervisors may require  the user to manually ensure
 * proper permissions on the file named by @to.
 *
 * @dumpformat controls which format the dump will have; use of
 * VIR_DOMAIN_CORE_DUMP_FORMAT_RAW mirrors what virDomainCoreDump() will
 * perform.  Not all hypervisors are able to support all formats.
 *
 * If @flags includes VIR_DUMP_CRASH, then leave the guest shut off with
 * a crashed state after the dump completes.  If @flags includes
 * VIR_DUMP_LIVE, then make the core dump while continuing to allow
 * the guest to run; otherwise, the guest is suspended during the dump.
 * VIR_DUMP_RESET flag forces reset of the guest after dump.
 * The above three flags are mutually exclusive.
 *
 * Additionally, if @flags includes VIR_DUMP_BYPASS_CACHE, then libvirt
 * will attempt to bypass the file system cache while creating the file,
 * or fail if it cannot do so for the given system; this can allow less
 * pressure on file system cache, but also risks slowing saves to NFS.
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainCoreDumpWithFormat(virDomainPtr domain, const char *to,
                            unsigned int dumpformat, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "to=%s, dumpformat=%u, flags=%x",
                     to, dumpformat, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(to, error);

    if (dumpformat >= VIR_DOMAIN_CORE_DUMP_FORMAT_LAST) {
        virReportInvalidArg(flags, _("dumpformat '%d' is not supported"),
                            dumpformat);
        goto error;
    }

1329 1330 1331
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DUMP_CRASH, VIR_DUMP_LIVE, error);
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DUMP_CRASH, VIR_DUMP_RESET, error);
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DUMP_LIVE, VIR_DUMP_RESET, error);
1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400

    if (conn->driver->domainCoreDumpWithFormat) {
        int ret;
        char *absolute_to;

        /* We must absolutize the file path as the save is done out of process */
        if (virFileAbsPath(to, &absolute_to) < 0) {
            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                           _("could not build absolute core file path"));
            goto error;
        }

        ret = conn->driver->domainCoreDumpWithFormat(domain, absolute_to,
                                                     dumpformat, flags);

        VIR_FREE(absolute_to);

        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainScreenshot:
 * @domain: a domain object
 * @stream: stream to use as output
 * @screen: monitor ID to take screenshot from
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Take a screenshot of current domain console as a stream. The image format
 * is hypervisor specific. Moreover, some hypervisors supports multiple
 * displays per domain. These can be distinguished by @screen argument.
 *
 * This call sets up a stream; subsequent use of stream API is necessary
 * to transfer actual data, determine how much data is successfully
 * transferred, and detect any errors.
 *
 * The screen ID is the sequential number of screen. In case of multiple
 * graphics cards, heads are enumerated before devices, e.g. having
 * two graphics cards, both with four heads, screen ID 5 addresses
 * the second head on the second card.
 *
 * Returns a string representing the mime-type of the image format, or
 * NULL upon error. The caller must free() the returned value.
 */
char *
virDomainScreenshot(virDomainPtr domain,
                    virStreamPtr stream,
                    unsigned int screen,
                    unsigned int flags)
{
    VIR_DOMAIN_DEBUG(domain, "stream=%p, flags=%x", stream, flags);

    virResetLastError();

    virCheckDomainReturn(domain, NULL);
    virCheckStreamGoto(stream, error);
    virCheckReadOnlyGoto(domain->conn->flags, error);

    if (domain->conn != stream->conn) {
        virReportInvalidArg(stream,
1401 1402
                            _("stream must match connection of domain '%s'"),
                            domain->name);
1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848
        goto error;
    }

    if (domain->conn->driver->domainScreenshot) {
        char *ret;
        ret = domain->conn->driver->domainScreenshot(domain, stream,
                                                     screen, flags);

        if (ret == NULL)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return NULL;
}


/**
 * virDomainShutdown:
 * @domain: a domain object
 *
 * Shutdown a domain, the domain object is still usable thereafter, but
 * the domain OS is being stopped. Note that the guest OS may ignore the
 * request. Additionally, the hypervisor may check and support the domain
 * 'on_poweroff' XML setting resulting in a domain that reboots instead of
 * shutting down. For guests that react to a shutdown request, the differences
 * from virDomainDestroy() are that the guests disk storage will be in a
 * stable state rather than having the (virtual) power cord pulled, and
 * this command returns as soon as the shutdown request is issued rather
 * than blocking until the guest is no longer running.
 *
 * If the domain is transient and has any snapshot metadata (see
 * virDomainSnapshotNum()), then that metadata will automatically
 * be deleted when the domain quits.
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainShutdown(virDomainPtr domain)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainShutdown) {
        int ret;
        ret = conn->driver->domainShutdown(domain);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainShutdownFlags:
 * @domain: a domain object
 * @flags: bitwise-OR of virDomainShutdownFlagValues
 *
 * Shutdown a domain, the domain object is still usable thereafter but
 * the domain OS is being stopped. Note that the guest OS may ignore the
 * request. Additionally, the hypervisor may check and support the domain
 * 'on_poweroff' XML setting resulting in a domain that reboots instead of
 * shutting down. For guests that react to a shutdown request, the differences
 * from virDomainDestroy() are that the guest's disk storage will be in a
 * stable state rather than having the (virtual) power cord pulled, and
 * this command returns as soon as the shutdown request is issued rather
 * than blocking until the guest is no longer running.
 *
 * If the domain is transient and has any snapshot metadata (see
 * virDomainSnapshotNum()), then that metadata will automatically
 * be deleted when the domain quits.
 *
 * If @flags is set to zero, then the hypervisor will choose the
 * method of shutdown it considers best. To have greater control
 * pass one or more of the virDomainShutdownFlagValues. The order
 * in which the hypervisor tries each shutdown method is undefined,
 * and a hypervisor is not required to support all methods.
 *
 * To use guest agent (VIR_DOMAIN_SHUTDOWN_GUEST_AGENT) the domain XML
 * must have <channel> configured.
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainShutdownFlags(virDomainPtr domain, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainShutdownFlags) {
        int ret;
        ret = conn->driver->domainShutdownFlags(domain, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainReboot:
 * @domain: a domain object
 * @flags: bitwise-OR of virDomainRebootFlagValues
 *
 * Reboot a domain, the domain object is still usable thereafter, but
 * the domain OS is being stopped for a restart.
 * Note that the guest OS may ignore the request.
 * Additionally, the hypervisor may check and support the domain
 * 'on_reboot' XML setting resulting in a domain that shuts down instead
 * of rebooting.
 *
 * If @flags is set to zero, then the hypervisor will choose the
 * method of shutdown it considers best. To have greater control
 * pass one or more of the virDomainRebootFlagValues. The order
 * in which the hypervisor tries each shutdown method is undefined,
 * and a hypervisor is not required to support all methods.
 *
 * To use guest agent (VIR_DOMAIN_REBOOT_GUEST_AGENT) the domain XML
 * must have <channel> configured.
 *
 * Due to implementation limitations in some drivers (the qemu driver,
 * for instance) it is not advised to migrate or save a guest that is
 * rebooting as a result of this API. Migrating such a guest can lead
 * to a plain shutdown on the destination.
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainReboot(virDomainPtr domain, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainReboot) {
        int ret;
        ret = conn->driver->domainReboot(domain, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainReset:
 * @domain: a domain object
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Reset a domain immediately without any guest OS shutdown.
 * Reset emulates the power reset button on a machine, where all
 * hardware sees the RST line set and reinitializes internal state.
 *
 * Note that there is a risk of data loss caused by reset without any
 * guest OS shutdown.
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainReset(virDomainPtr domain, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainReset) {
        int ret;
        ret = conn->driver->domainReset(domain, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetName:
 * @domain: a domain object
 *
 * Get the public name for that domain
 *
 * Returns a pointer to the name or NULL, the string need not be deallocated
 * its lifetime will be the same as the domain object.
 */
const char *
virDomainGetName(virDomainPtr domain)
{
    VIR_DEBUG("domain=%p", domain);

    virResetLastError();

    virCheckDomainReturn(domain, NULL);

    return domain->name;
}


/**
 * virDomainGetUUID:
 * @domain: a domain object
 * @uuid: pointer to a VIR_UUID_BUFLEN bytes array
 *
 * Get the UUID for a domain
 *
 * Returns -1 in case of error, 0 in case of success
 */
int
virDomainGetUUID(virDomainPtr domain, unsigned char *uuid)
{
    VIR_DOMAIN_DEBUG(domain, "uuid=%p", uuid);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    virCheckNonNullArgGoto(uuid, error);

    memcpy(uuid, &domain->uuid[0], VIR_UUID_BUFLEN);

    return 0;

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetUUIDString:
 * @domain: a domain object
 * @buf: pointer to a VIR_UUID_STRING_BUFLEN bytes array
 *
 * Get the UUID for a domain as string. For more information about
 * UUID see RFC4122.
 *
 * Returns -1 in case of error, 0 in case of success
 */
int
virDomainGetUUIDString(virDomainPtr domain, char *buf)
{
    VIR_DOMAIN_DEBUG(domain, "buf=%p", buf);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    virCheckNonNullArgGoto(buf, error);

    virUUIDFormat(domain->uuid, buf);
    return 0;

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetID:
 * @domain: a domain object
 *
 * Get the hypervisor ID number for the domain
 *
 * Returns the domain ID number or (unsigned int) -1 in case of error
 */
unsigned int
virDomainGetID(virDomainPtr domain)
{
    VIR_DOMAIN_DEBUG(domain);

    virResetLastError();

    virCheckDomainReturn(domain, (unsigned int)-1);

    return domain->id;
}


/**
 * virDomainGetOSType:
 * @domain: a domain object
 *
 * Get the type of domain operation system.
 *
 * Returns the new string or NULL in case of error, the string must be
 *         freed by the caller.
 */
char *
virDomainGetOSType(virDomainPtr domain)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain);

    virResetLastError();

    virCheckDomainReturn(domain, NULL);
    conn = domain->conn;

    if (conn->driver->domainGetOSType) {
        char *ret;
        ret = conn->driver->domainGetOSType(domain);
        if (!ret)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return NULL;
}


/**
 * virDomainGetMaxMemory:
 * @domain: a domain object or NULL
 *
 * Retrieve the maximum amount of physical memory allocated to a
 * domain. If domain is NULL, then this get the amount of memory reserved
 * to Domain0 i.e. the domain where the application runs.
 *
 * Returns the memory size in kibibytes (blocks of 1024 bytes), or 0 in
 * case of error.
 */
unsigned long
virDomainGetMaxMemory(virDomainPtr domain)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain);

    virResetLastError();

    virCheckDomainReturn(domain, 0);
    conn = domain->conn;

    if (conn->driver->domainGetMaxMemory) {
        unsigned long long ret;
        ret = conn->driver->domainGetMaxMemory(domain);
        if (ret == 0)
            goto error;
        if ((unsigned long) ret != ret) {
            virReportError(VIR_ERR_OVERFLOW, _("result too large: %llu"),
                           ret);
            goto error;
        }
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return 0;
}


/**
 * virDomainSetMaxMemory:
 * @domain: a domain object or NULL
 * @memory: the memory size in kibibytes (blocks of 1024 bytes)
 *
 * Dynamically change the maximum amount of physical memory allocated to a
 * domain. If domain is NULL, then this change the amount of memory reserved
 * to Domain0 i.e. the domain where the application runs.
 * This function may require privileged access to the hypervisor.
 *
 * This command is hypervisor-specific for whether active, persistent,
 * or both configurations are changed; for more control, use
 * virDomainSetMemoryFlags().
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainSetMaxMemory(virDomainPtr domain, unsigned long memory)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "memory=%lu", memory);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonZeroArgGoto(memory, error);

1849 1850 1851 1852 1853 1854
    if (virMemoryMaxValue(true) / 1024 <= memory) {
        virReportError(VIR_ERR_OVERFLOW, _("input too large: %lu"),
                       memory);
        goto error;
    }

1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880
    if (conn->driver->domainSetMaxMemory) {
        int ret;
        ret = conn->driver->domainSetMaxMemory(domain, memory);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainSetMemory:
 * @domain: a domain object or NULL
 * @memory: the memory size in kibibytes (blocks of 1024 bytes)
 *
 * Dynamically change the target amount of physical memory allocated to a
 * domain. If domain is NULL, then this change the amount of memory reserved
 * to Domain0 i.e. the domain where the application runs.
 * This function may require privileged access to the hypervisor.
 *
1881 1882 1883
 * This command is hypervisor-specific for whether active, persistent,
 * or both configurations are changed; for more control, use
 * virDomainSetMemoryFlags().
1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainSetMemory(virDomainPtr domain, unsigned long memory)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "memory=%lu", memory);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonZeroArgGoto(memory, error);

1902 1903 1904 1905 1906 1907
    if (virMemoryMaxValue(true) / 1024 <= memory) {
        virReportError(VIR_ERR_OVERFLOW, _("input too large: %lu"),
                       memory);
        goto error;
    }

1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964
    if (conn->driver->domainSetMemory) {
        int ret;
        ret = conn->driver->domainSetMemory(domain, memory);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainSetMemoryFlags:
 * @domain: a domain object or NULL
 * @memory: the memory size in kibibytes (blocks of 1024 bytes)
 * @flags: bitwise-OR of virDomainMemoryModFlags
 *
 * Dynamically change the target amount of physical memory allocated to a
 * domain. If domain is NULL, then this change the amount of memory reserved
 * to Domain0 i.e. the domain where the application runs.
 * This function may require privileged access to the hypervisor.
 *
 * @flags may include VIR_DOMAIN_AFFECT_LIVE or VIR_DOMAIN_AFFECT_CONFIG.
 * Both flags may be set. If VIR_DOMAIN_AFFECT_LIVE is set, the change affects
 * a running domain and will fail if domain is not active.
 * If VIR_DOMAIN_AFFECT_CONFIG is set, the change affects persistent state,
 * and will fail for transient domains. If neither flag is specified
 * (that is, @flags is VIR_DOMAIN_AFFECT_CURRENT), then an inactive domain
 * modifies persistent setup, while an active domain is hypervisor-dependent
 * on whether just live or both live and persistent state is changed.
 * If VIR_DOMAIN_MEM_MAXIMUM is set, the change affects domain's maximum memory
 * size rather than current memory size.
 * Not all hypervisors can support all flag combinations.
 *
 * Returns 0 in case of success, -1 in case of failure.
 */
int
virDomainSetMemoryFlags(virDomainPtr domain, unsigned long memory,
                        unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "memory=%lu, flags=%x", memory, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonZeroArgGoto(memory, error);

1965 1966 1967 1968 1969 1970
    if (virMemoryMaxValue(true) / 1024 <= memory) {
        virReportError(VIR_ERR_OVERFLOW, _("input too large: %lu"),
                       memory);
        goto error;
    }

1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014
    if (conn->driver->domainSetMemoryFlags) {
        int ret;
        ret = conn->driver->domainSetMemoryFlags(domain, memory, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainSetMemoryStatsPeriod:
 * @domain: a domain object or NULL
 * @period: the period in seconds for stats collection
 * @flags: bitwise-OR of virDomainMemoryModFlags
 *
 * Dynamically change the domain memory balloon driver statistics collection
 * period. Use 0 to disable and a positive value to enable.
 *
 * @flags may include VIR_DOMAIN_AFFECT_LIVE or VIR_DOMAIN_AFFECT_CONFIG.
 * Both flags may be set. If VIR_DOMAIN_AFFECT_LIVE is set, the change affects
 * a running domain and will fail if domain is not active.
 * If VIR_DOMAIN_AFFECT_CONFIG is set, the change affects persistent state,
 * and will fail for transient domains. If neither flag is specified
 * (that is, @flags is VIR_DOMAIN_AFFECT_CURRENT), then an inactive domain
 * modifies persistent setup, while an active domain is hypervisor-dependent
 * on whether just live or both live and persistent state is changed.
 *
 * Not all hypervisors can support all flag combinations.
 *
 * Returns 0 in case of success, -1 in case of failure.
 */
int
virDomainSetMemoryStatsPeriod(virDomainPtr domain, int period,
                              unsigned int flags)
{
    virConnectPtr conn;

2015
    VIR_DOMAIN_DEBUG(domain, "period=%d, flags=%x", period, flags);
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    /* This must be positive to set the balloon collection period */
    virCheckNonNegativeArgGoto(period, error);

    if (conn->driver->domainSetMemoryStatsPeriod) {
        int ret;
        ret = conn->driver->domainSetMemoryStatsPeriod(domain, period, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainSetMemoryParameters:
 * @domain: pointer to domain object
 * @params: pointer to memory parameter objects
 * @nparams: number of memory parameter (this value can be the same or
 *          less than the number of parameters supported)
 * @flags: bitwise-OR of virDomainModificationImpact
 *
 * Change all or a subset of the memory tunables.
 * This function may require privileged access to the hypervisor.
 *
2054 2055 2056
 * Possible values for all *_limit memory tunables are in range from 0 to
 * VIR_DOMAIN_MEMORY_PARAM_UNLIMITED.
 *
2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154
 * Returns -1 in case of error, 0 in case of success.
 */
int
virDomainSetMemoryParameters(virDomainPtr domain,
                             virTypedParameterPtr params,
                             int nparams, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d, flags=%x",
                     params, nparams, flags);
    VIR_TYPED_PARAMS_DEBUG(params, nparams);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(params, error);
    virCheckPositiveArgGoto(nparams, error);

    if (virTypedParameterValidateSet(conn, params, nparams) < 0)
        goto error;

    if (conn->driver->domainSetMemoryParameters) {
        int ret;
        ret = conn->driver->domainSetMemoryParameters(domain, params, nparams, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetMemoryParameters:
 * @domain: pointer to domain object
 * @params: pointer to memory parameter object
 *          (return value, allocated by the caller)
 * @nparams: pointer to number of memory parameters; input and output
 * @flags: bitwise-OR of virDomainModificationImpact and virTypedParameterFlags
 *
 * Get all memory parameters.  On input, @nparams gives the size of the
 * @params array; on output, @nparams gives how many slots were filled
 * with parameter information, which might be less but will not exceed
 * the input value.
 *
 * As a special case, calling with @params as NULL and @nparams as 0 on
 * input will cause @nparams on output to contain the number of parameters
 * supported by the hypervisor. The caller should then allocate @params
 * array, i.e. (sizeof(@virTypedParameter) * @nparams) bytes and call the API
 * again.
 *
 * Here is a sample code snippet:
 *
 *   if (virDomainGetMemoryParameters(dom, NULL, &nparams, 0) == 0 &&
 *       nparams != 0) {
 *       if ((params = malloc(sizeof(*params) * nparams)) == NULL)
 *           goto error;
 *       memset(params, 0, sizeof(*params) * nparams);
 *       if (virDomainGetMemoryParameters(dom, params, &nparams, 0))
 *           goto error;
 *   }
 *
 * This function may require privileged access to the hypervisor. This function
 * expects the caller to allocate the @params.
 *
 * Returns -1 in case of error, 0 in case of success.
 */
int
virDomainGetMemoryParameters(virDomainPtr domain,
                             virTypedParameterPtr params,
                             int *nparams, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d, flags=%x",
                     params, (nparams) ? *nparams : -1, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    virCheckNonNullArgGoto(nparams, error);
    virCheckNonNegativeArgGoto(*nparams, error);
    if (*nparams != 0)
        virCheckNonNullArgGoto(params, error);

    if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                 VIR_DRV_FEATURE_TYPED_PARAM_STRING))
        flags |= VIR_TYPED_PARAM_STRING_OKAY;

2155 2156 2157 2158
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_AFFECT_LIVE,
                             VIR_DOMAIN_AFFECT_CONFIG,
                             error);

2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393
    conn = domain->conn;

    if (conn->driver->domainGetMemoryParameters) {
        int ret;
        ret = conn->driver->domainGetMemoryParameters(domain, params, nparams, flags);
        if (ret < 0)
            goto error;
        return ret;
    }
    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainSetNumaParameters:
 * @domain: pointer to domain object
 * @params: pointer to numa parameter objects
 * @nparams: number of numa parameters (this value can be the same or
 *          less than the number of parameters supported)
 * @flags: bitwise-OR of virDomainModificationImpact
 *
 * Change all or a subset of the numa tunables.
 * This function may require privileged access to the hypervisor.
 *
 * Returns -1 in case of error, 0 in case of success.
 */
int
virDomainSetNumaParameters(virDomainPtr domain,
                           virTypedParameterPtr params,
                           int nparams, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d, flags=%x",
                     params, nparams, flags);
    VIR_TYPED_PARAMS_DEBUG(params, nparams);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    virCheckReadOnlyGoto(domain->conn->flags, error);
    virCheckNonNullArgGoto(params, error);
    virCheckPositiveArgGoto(nparams, error);
    if (virTypedParameterValidateSet(domain->conn, params, nparams) < 0)
        goto error;

    conn = domain->conn;

    if (conn->driver->domainSetNumaParameters) {
        int ret;
        ret = conn->driver->domainSetNumaParameters(domain, params, nparams,
                                                    flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetNumaParameters:
 * @domain: pointer to domain object
 * @params: pointer to numa parameter object
 *          (return value, allocated by the caller)
 * @nparams: pointer to number of numa parameters
 * @flags: bitwise-OR of virDomainModificationImpact and virTypedParameterFlags
 *
 * Get all numa parameters.  On input, @nparams gives the size of the
 * @params array; on output, @nparams gives how many slots were filled
 * with parameter information, which might be less but will not exceed
 * the input value.
 *
 * As a special case, calling with @params as NULL and @nparams as 0 on
 * input will cause @nparams on output to contain the number of parameters
 * supported by the hypervisor. The caller should then allocate @params
 * array, i.e. (sizeof(@virTypedParameter) * @nparams) bytes and call the API
 * again.
 *
 * See virDomainGetMemoryParameters() for an equivalent usage example.
 *
 * This function may require privileged access to the hypervisor. This function
 * expects the caller to allocate the @params.
 *
 * Returns -1 in case of error, 0 in case of success.
 */
int
virDomainGetNumaParameters(virDomainPtr domain,
                           virTypedParameterPtr params,
                           int *nparams, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d, flags=%x",
                     params, (nparams) ? *nparams : -1, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    virCheckNonNullArgGoto(nparams, error);
    virCheckNonNegativeArgGoto(*nparams, error);
    if (*nparams != 0)
        virCheckNonNullArgGoto(params, error);

    if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                 VIR_DRV_FEATURE_TYPED_PARAM_STRING))
        flags |= VIR_TYPED_PARAM_STRING_OKAY;

    conn = domain->conn;

    if (conn->driver->domainGetNumaParameters) {
        int ret;
        ret = conn->driver->domainGetNumaParameters(domain, params, nparams,
                                                    flags);
        if (ret < 0)
            goto error;
        return ret;
    }
    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainSetBlkioParameters:
 * @domain: pointer to domain object
 * @params: pointer to blkio parameter objects
 * @nparams: number of blkio parameters (this value can be the same or
 *          less than the number of parameters supported)
 * @flags: bitwise-OR of virDomainModificationImpact
 *
 * Change all or a subset of the blkio tunables.
 * This function may require privileged access to the hypervisor.
 *
 * Returns -1 in case of error, 0 in case of success.
 */
int
virDomainSetBlkioParameters(virDomainPtr domain,
                            virTypedParameterPtr params,
                            int nparams, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d, flags=%x",
                     params, nparams, flags);
    VIR_TYPED_PARAMS_DEBUG(params, nparams);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(params, error);
    virCheckNonNegativeArgGoto(nparams, error);

    if (virTypedParameterValidateSet(conn, params, nparams) < 0)
        goto error;

    if (conn->driver->domainSetBlkioParameters) {
        int ret;
        ret = conn->driver->domainSetBlkioParameters(domain, params, nparams, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetBlkioParameters:
 * @domain: pointer to domain object
 * @params: pointer to blkio parameter object
 *          (return value, allocated by the caller)
 * @nparams: pointer to number of blkio parameters; input and output
 * @flags: bitwise-OR of virDomainModificationImpact and virTypedParameterFlags
 *
 * Get all blkio parameters.  On input, @nparams gives the size of the
 * @params array; on output, @nparams gives how many slots were filled
 * with parameter information, which might be less but will not exceed
 * the input value.
 *
 * As a special case, calling with @params as NULL and @nparams as 0 on
 * input will cause @nparams on output to contain the number of parameters
 * supported by the hypervisor. The caller should then allocate @params
 * array, i.e. (sizeof(@virTypedParameter) * @nparams) bytes and call the API
 * again.
 *
 * See virDomainGetMemoryParameters() for an equivalent usage example.
 *
 * This function may require privileged access to the hypervisor. This function
 * expects the caller to allocate the @params.
 *
 * Returns -1 in case of error, 0 in case of success.
 */
int
virDomainGetBlkioParameters(virDomainPtr domain,
                            virTypedParameterPtr params,
                            int *nparams, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d, flags=%x",
                     params, (nparams) ? *nparams : -1, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    virCheckNonNullArgGoto(nparams, error);
    virCheckNonNegativeArgGoto(*nparams, error);
    if (*nparams != 0)
        virCheckNonNullArgGoto(params, error);

    if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                 VIR_DRV_FEATURE_TYPED_PARAM_STRING))
        flags |= VIR_TYPED_PARAM_STRING_OKAY;

2394 2395 2396 2397
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_AFFECT_LIVE,
                             VIR_DOMAIN_AFFECT_CONFIG,
                             error);

2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578
    conn = domain->conn;

    if (conn->driver->domainGetBlkioParameters) {
        int ret;
        ret = conn->driver->domainGetBlkioParameters(domain, params, nparams, flags);
        if (ret < 0)
            goto error;
        return ret;
    }
    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetInfo:
 * @domain: a domain object
 * @info: pointer to a virDomainInfo structure allocated by the user
 *
 * Extract information about a domain. Note that if the connection
 * used to get the domain is limited only a partial set of the information
 * can be extracted.
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainGetInfo(virDomainPtr domain, virDomainInfoPtr info)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "info=%p", info);

    virResetLastError();

    if (info)
        memset(info, 0, sizeof(*info));

    virCheckDomainReturn(domain, -1);
    virCheckNonNullArgGoto(info, error);

    conn = domain->conn;

    if (conn->driver->domainGetInfo) {
        int ret;
        ret = conn->driver->domainGetInfo(domain, info);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetState:
 * @domain: a domain object
 * @state: returned state of the domain (one of virDomainState)
 * @reason: returned reason which led to @state (one of virDomain*Reason
 * corresponding to the current state); it is allowed to be NULL
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Extract domain state. Each state can be accompanied with a reason (if known)
 * which led to the state.
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainGetState(virDomainPtr domain,
                  int *state,
                  int *reason,
                  unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "state=%p, reason=%p, flags=%x",
                     state, reason, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    virCheckNonNullArgGoto(state, error);

    conn = domain->conn;
    if (conn->driver->domainGetState) {
        int ret;
        ret = conn->driver->domainGetState(domain, state, reason, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetControlInfo:
 * @domain: a domain object
 * @info: pointer to a virDomainControlInfo structure allocated by the user
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Extract details about current state of control interface to a domain.
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainGetControlInfo(virDomainPtr domain,
                        virDomainControlInfoPtr info,
                        unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "info=%p, flags=%x", info, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    virCheckNonNullArgGoto(info, error);

    conn = domain->conn;
    if (conn->driver->domainGetControlInfo) {
        int ret;
        ret = conn->driver->domainGetControlInfo(domain, info, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetXMLDesc:
 * @domain: a domain object
 * @flags: bitwise-OR of virDomainXMLFlags
 *
 * Provide an XML description of the domain. The description may be reused
 * later to relaunch the domain with virDomainCreateXML().
 *
 * No security-sensitive data will be included unless @flags contains
 * VIR_DOMAIN_XML_SECURE; this flag is rejected on read-only
 * connections.  If @flags includes VIR_DOMAIN_XML_INACTIVE, then the
 * XML represents the configuration that will be used on the next boot
 * of a persistent domain; otherwise, the configuration represents the
 * currently running domain.  If @flags contains
 * VIR_DOMAIN_XML_UPDATE_CPU, then the portion of the domain XML
 * describing CPU capabilities is modified to match actual
 * capabilities of the host.
 *
 * Returns a 0 terminated UTF-8 encoded XML instance, or NULL in case of error.
 *         the caller must free() the returned value.
 */
char *
virDomainGetXMLDesc(virDomainPtr domain, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);

    virResetLastError();

    virCheckDomainReturn(domain, NULL);
    conn = domain->conn;

2579 2580
    if ((conn->flags & VIR_CONNECT_RO) &&
        (flags & (VIR_DOMAIN_XML_SECURE | VIR_DOMAIN_XML_MIGRATABLE))) {
2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610
        virReportError(VIR_ERR_OPERATION_DENIED, "%s",
                       _("virDomainGetXMLDesc with secure flag"));
        goto error;
    }

    if (conn->driver->domainGetXMLDesc) {
        char *ret;
        ret = conn->driver->domainGetXMLDesc(domain, flags);
        if (!ret)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return NULL;
}


/**
 * virConnectDomainXMLFromNative:
 * @conn: a connection object
 * @nativeFormat: configuration format importing from
 * @nativeConfig: the configuration data to import
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Reads native configuration data  describing a domain, and
 * generates libvirt domain XML. The format of the native
2611
 * data is hypervisor dependent.
2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622
 *
 * Returns a 0 terminated UTF-8 encoded XML instance, or NULL in case of error.
 *         the caller must free() the returned value.
 */
char *
virConnectDomainXMLFromNative(virConnectPtr conn,
                              const char *nativeFormat,
                              const char *nativeConfig,
                              unsigned int flags)
{
    VIR_DEBUG("conn=%p, format=%s, config=%s, flags=%x",
2623
              conn, NULLSTR(nativeFormat), NULLSTR(nativeConfig), flags);
2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660

    virResetLastError();

    virCheckConnectReturn(conn, NULL);
    virCheckReadOnlyGoto(conn->flags, error);

    virCheckNonNullArgGoto(nativeFormat, error);
    virCheckNonNullArgGoto(nativeConfig, error);

    if (conn->driver->connectDomainXMLFromNative) {
        char *ret;
        ret = conn->driver->connectDomainXMLFromNative(conn,
                                                       nativeFormat,
                                                       nativeConfig,
                                                       flags);
        if (!ret)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return NULL;
}


/**
 * virConnectDomainXMLToNative:
 * @conn: a connection object
 * @nativeFormat: configuration format exporting to
 * @domainXml: the domain configuration to export
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Reads a domain XML configuration document, and generates
 * a native configuration file describing the domain.
2661
 * The format of the native data is hypervisor dependent.
2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672
 *
 * Returns a 0 terminated UTF-8 encoded native config datafile, or NULL in case of error.
 *         the caller must free() the returned value.
 */
char *
virConnectDomainXMLToNative(virConnectPtr conn,
                            const char *nativeFormat,
                            const char *domainXml,
                            unsigned int flags)
{
    VIR_DEBUG("conn=%p, format=%s, xml=%s, flags=%x",
2673
              conn, NULLSTR(nativeFormat), NULLSTR(domainXml), flags);
2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174

    virResetLastError();

    virCheckConnectReturn(conn, NULL);
    virCheckReadOnlyGoto(conn->flags, error);

    virCheckNonNullArgGoto(nativeFormat, error);
    virCheckNonNullArgGoto(domainXml, error);

    if (conn->driver->connectDomainXMLToNative) {
        char *ret;
        ret = conn->driver->connectDomainXMLToNative(conn,
                                                     nativeFormat,
                                                     domainXml,
                                                     flags);
        if (!ret)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return NULL;
}


/*
 * Sequence v1:
 *
 *  Dst: Prepare
 *        - Get ready to accept incoming VM
 *        - Generate optional cookie to pass to src
 *
 *  Src: Perform
 *        - Start migration and wait for send completion
 *        - Kill off VM if successful, resume if failed
 *
 *  Dst: Finish
 *        - Wait for recv completion and check status
 *        - Kill off VM if unsuccessful
 *
 */
static virDomainPtr
virDomainMigrateVersion1(virDomainPtr domain,
                         virConnectPtr dconn,
                         unsigned long flags,
                         const char *dname,
                         const char *uri,
                         unsigned long bandwidth)
{
    virDomainPtr ddomain = NULL;
    char *uri_out = NULL;
    char *cookie = NULL;
    int cookielen = 0, ret;
    virDomainInfo info;
    unsigned int destflags;

    VIR_DOMAIN_DEBUG(domain,
                     "dconn=%p, flags=%lx, dname=%s, uri=%s, bandwidth=%lu",
                     dconn, flags, NULLSTR(dname), NULLSTR(uri), bandwidth);

    ret = virDomainGetInfo(domain, &info);
    if (ret == 0 && info.state == VIR_DOMAIN_PAUSED)
        flags |= VIR_MIGRATE_PAUSED;

    destflags = flags & ~(VIR_MIGRATE_ABORT_ON_ERROR |
                          VIR_MIGRATE_AUTO_CONVERGE);

    /* Prepare the migration.
     *
     * The destination host may return a cookie, or leave cookie as
     * NULL.
     *
     * The destination host MUST set uri_out if uri_in is NULL.
     *
     * If uri_in is non-NULL, then the destination host may modify
     * the URI by setting uri_out.  If it does not wish to modify
     * the URI, it should leave uri_out as NULL.
     */
    if (dconn->driver->domainMigratePrepare
        (dconn, &cookie, &cookielen, uri, &uri_out, destflags, dname,
         bandwidth) == -1)
        goto done;

    if (uri == NULL && uri_out == NULL) {
        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                       _("domainMigratePrepare did not set uri"));
        goto done;
    }
    if (uri_out)
        uri = uri_out; /* Did domainMigratePrepare change URI? */

    /* Perform the migration.  The driver isn't supposed to return
     * until the migration is complete.
     */
    if (domain->conn->driver->domainMigratePerform
        (domain, cookie, cookielen, uri, flags, dname, bandwidth) == -1)
        goto done;

    /* Get the destination domain and return it or error.
     * 'domain' no longer actually exists at this point
     * (or so we hope), but we still use the object in memory
     * in order to get the name.
     */
    dname = dname ? dname : domain->name;
    if (dconn->driver->domainMigrateFinish)
        ddomain = dconn->driver->domainMigrateFinish
            (dconn, dname, cookie, cookielen, uri, destflags);
    else
        ddomain = virDomainLookupByName(dconn, dname);

 done:
    VIR_FREE(uri_out);
    VIR_FREE(cookie);
    return ddomain;
}


/*
 * Sequence v2:
 *
 *  Src: DumpXML
 *        - Generate XML to pass to dst
 *
 *  Dst: Prepare
 *        - Get ready to accept incoming VM
 *        - Generate optional cookie to pass to src
 *
 *  Src: Perform
 *        - Start migration and wait for send completion
 *        - Kill off VM if successful, resume if failed
 *
 *  Dst: Finish
 *        - Wait for recv completion and check status
 *        - Kill off VM if unsuccessful
 *
 */
static virDomainPtr
virDomainMigrateVersion2(virDomainPtr domain,
                         virConnectPtr dconn,
                         unsigned long flags,
                         const char *dname,
                         const char *uri,
                         unsigned long bandwidth)
{
    virDomainPtr ddomain = NULL;
    char *uri_out = NULL;
    char *cookie = NULL;
    char *dom_xml = NULL;
    int cookielen = 0, ret;
    virDomainInfo info;
    virErrorPtr orig_err = NULL;
    unsigned int getxml_flags = 0;
    int cancelled;
    unsigned long destflags;

    VIR_DOMAIN_DEBUG(domain,
                     "dconn=%p, flags=%lx, dname=%s, uri=%s, bandwidth=%lu",
                     dconn, flags, NULLSTR(dname), NULLSTR(uri), bandwidth);

    /* Prepare the migration.
     *
     * The destination host may return a cookie, or leave cookie as
     * NULL.
     *
     * The destination host MUST set uri_out if uri_in is NULL.
     *
     * If uri_in is non-NULL, then the destination host may modify
     * the URI by setting uri_out.  If it does not wish to modify
     * the URI, it should leave uri_out as NULL.
     */

    /* In version 2 of the protocol, the prepare step is slightly
     * different.  We fetch the domain XML of the source domain
     * and pass it to Prepare2.
     */
    if (!domain->conn->driver->domainGetXMLDesc) {
        virReportUnsupportedError();
        return NULL;
    }

    if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                 VIR_DRV_FEATURE_XML_MIGRATABLE)) {
        getxml_flags |= VIR_DOMAIN_XML_MIGRATABLE;
    } else {
        getxml_flags |= VIR_DOMAIN_XML_SECURE | VIR_DOMAIN_XML_UPDATE_CPU;
    }

    dom_xml = domain->conn->driver->domainGetXMLDesc(domain, getxml_flags);
    if (!dom_xml)
        return NULL;

    ret = virDomainGetInfo(domain, &info);
    if (ret == 0 && info.state == VIR_DOMAIN_PAUSED)
        flags |= VIR_MIGRATE_PAUSED;

    destflags = flags & ~(VIR_MIGRATE_ABORT_ON_ERROR |
                          VIR_MIGRATE_AUTO_CONVERGE);

    VIR_DEBUG("Prepare2 %p flags=%lx", dconn, destflags);
    ret = dconn->driver->domainMigratePrepare2
        (dconn, &cookie, &cookielen, uri, &uri_out, destflags, dname,
         bandwidth, dom_xml);
    VIR_FREE(dom_xml);
    if (ret == -1)
        goto done;

    if (uri == NULL && uri_out == NULL) {
        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                       _("domainMigratePrepare2 did not set uri"));
        cancelled = 1;
        /* Make sure Finish doesn't overwrite the error */
        orig_err = virSaveLastError();
        goto finish;
    }
    if (uri_out)
        uri = uri_out; /* Did domainMigratePrepare2 change URI? */

    /* Perform the migration.  The driver isn't supposed to return
     * until the migration is complete.
     */
    VIR_DEBUG("Perform %p", domain->conn);
    ret = domain->conn->driver->domainMigratePerform
        (domain, cookie, cookielen, uri, flags, dname, bandwidth);

    /* Perform failed. Make sure Finish doesn't overwrite the error */
    if (ret < 0)
        orig_err = virSaveLastError();

    /* If Perform returns < 0, then we need to cancel the VM
     * startup on the destination
     */
    cancelled = ret < 0 ? 1 : 0;

 finish:
    /* In version 2 of the migration protocol, we pass the
     * status code from the sender to the destination host,
     * so it can do any cleanup if the migration failed.
     */
    dname = dname ? dname : domain->name;
    VIR_DEBUG("Finish2 %p ret=%d", dconn, ret);
    ddomain = dconn->driver->domainMigrateFinish2
        (dconn, dname, cookie, cookielen, uri, destflags, cancelled);
    if (cancelled && ddomain)
        VIR_ERROR(_("finish step ignored that migration was cancelled"));

 done:
    if (orig_err) {
        virSetError(orig_err);
        virFreeError(orig_err);
    }
    VIR_FREE(uri_out);
    VIR_FREE(cookie);
    return ddomain;
}


/*
 * Sequence v3:
 *
 *  Src: Begin
 *        - Generate XML to pass to dst
 *        - Generate optional cookie to pass to dst
 *
 *  Dst: Prepare
 *        - Get ready to accept incoming VM
 *        - Generate optional cookie to pass to src
 *
 *  Src: Perform
 *        - Start migration and wait for send completion
 *        - Generate optional cookie to pass to dst
 *
 *  Dst: Finish
 *        - Wait for recv completion and check status
 *        - Kill off VM if failed, resume if success
 *        - Generate optional cookie to pass to src
 *
 *  Src: Confirm
 *        - Kill off VM if success, resume if failed
 *
  * If useParams is true, params and nparams contain migration parameters and
  * we know it's safe to call the API which supports extensible parameters.
  * Otherwise, we have to use xmlin, dname, uri, and bandwidth and pass them
  * to the old-style APIs.
 */
static virDomainPtr
virDomainMigrateVersion3Full(virDomainPtr domain,
                             virConnectPtr dconn,
                             const char *xmlin,
                             const char *dname,
                             const char *uri,
                             unsigned long long bandwidth,
                             virTypedParameterPtr params,
                             int nparams,
                             bool useParams,
                             unsigned int flags)
{
    virDomainPtr ddomain = NULL;
    char *uri_out = NULL;
    char *cookiein = NULL;
    char *cookieout = NULL;
    char *dom_xml = NULL;
    int cookieinlen = 0;
    int cookieoutlen = 0;
    int ret;
    virDomainInfo info;
    virErrorPtr orig_err = NULL;
    int cancelled = 1;
    unsigned long protection = 0;
    bool notify_source = true;
    unsigned int destflags;
    int state;
    virTypedParameterPtr tmp;

    VIR_DOMAIN_DEBUG(domain,
                     "dconn=%p, xmlin=%s, dname=%s, uri=%s, bandwidth=%llu, "
                     "params=%p, nparams=%d, useParams=%d, flags=%x",
                     dconn, NULLSTR(xmlin), NULLSTR(dname), NULLSTR(uri),
                     bandwidth, params, nparams, useParams, flags);
    VIR_TYPED_PARAMS_DEBUG(params, nparams);

    if ((!useParams &&
         (!domain->conn->driver->domainMigrateBegin3 ||
          !domain->conn->driver->domainMigratePerform3 ||
          !domain->conn->driver->domainMigrateConfirm3 ||
          !dconn->driver->domainMigratePrepare3 ||
          !dconn->driver->domainMigrateFinish3)) ||
        (useParams &&
         (!domain->conn->driver->domainMigrateBegin3Params ||
          !domain->conn->driver->domainMigratePerform3Params ||
          !domain->conn->driver->domainMigrateConfirm3Params ||
          !dconn->driver->domainMigratePrepare3Params ||
          !dconn->driver->domainMigrateFinish3Params))) {
        virReportUnsupportedError();
        return NULL;
    }

    if (virTypedParamsCopy(&tmp, params, nparams) < 0)
        return NULL;
    params = tmp;

    if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                 VIR_DRV_FEATURE_MIGRATE_CHANGE_PROTECTION))
        protection = VIR_MIGRATE_CHANGE_PROTECTION;

    VIR_DEBUG("Begin3 %p", domain->conn);
    if (useParams) {
        dom_xml = domain->conn->driver->domainMigrateBegin3Params
            (domain, params, nparams, &cookieout, &cookieoutlen,
             flags | protection);
    } else {
        dom_xml = domain->conn->driver->domainMigrateBegin3
            (domain, xmlin, &cookieout, &cookieoutlen,
             flags | protection, dname, bandwidth);
    }
    if (!dom_xml)
        goto done;

    if (useParams) {
        /* If source is new enough to support extensible migration parameters,
         * it's certainly new enough to support virDomainGetState. */
        ret = virDomainGetState(domain, &state, NULL, 0);
    } else {
        ret = virDomainGetInfo(domain, &info);
        state = info.state;
    }
    if (ret == 0 && state == VIR_DOMAIN_PAUSED)
        flags |= VIR_MIGRATE_PAUSED;

    destflags = flags & ~(VIR_MIGRATE_ABORT_ON_ERROR |
                          VIR_MIGRATE_AUTO_CONVERGE);

    VIR_DEBUG("Prepare3 %p flags=%x", dconn, destflags);
    cookiein = cookieout;
    cookieinlen = cookieoutlen;
    cookieout = NULL;
    cookieoutlen = 0;
    if (useParams) {
        if (virTypedParamsReplaceString(&params, &nparams,
                                        VIR_MIGRATE_PARAM_DEST_XML,
                                        dom_xml) < 0)
            goto done;
        ret = dconn->driver->domainMigratePrepare3Params
            (dconn, params, nparams, cookiein, cookieinlen,
             &cookieout, &cookieoutlen, &uri_out, destflags);
    } else {
        ret = dconn->driver->domainMigratePrepare3
            (dconn, cookiein, cookieinlen, &cookieout, &cookieoutlen,
             uri, &uri_out, destflags, dname, bandwidth, dom_xml);
    }
    if (ret == -1) {
        if (protection) {
            /* Begin already started a migration job so we need to cancel it by
             * calling Confirm while making sure it doesn't overwrite the error
             */
            orig_err = virSaveLastError();
            goto confirm;
        } else {
            goto done;
        }
    }

    /* Did domainMigratePrepare3 change URI? */
    if (uri_out) {
        uri = uri_out;
        if (useParams &&
            virTypedParamsReplaceString(&params, &nparams,
                                        VIR_MIGRATE_PARAM_URI,
                                        uri_out) < 0) {
            cancelled = 1;
            orig_err = virSaveLastError();
            goto finish;
        }
    } else if (!uri &&
               virTypedParamsGetString(params, nparams,
                                       VIR_MIGRATE_PARAM_URI, &uri) <= 0) {
        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                       _("domainMigratePrepare3 did not set uri"));
        cancelled = 1;
        orig_err = virSaveLastError();
        goto finish;
    }

    if (flags & VIR_MIGRATE_OFFLINE) {
        VIR_DEBUG("Offline migration, skipping Perform phase");
        VIR_FREE(cookieout);
        cookieoutlen = 0;
        cancelled = 0;
        goto finish;
    }

    /* Perform the migration.  The driver isn't supposed to return
     * until the migration is complete. The src VM should remain
     * running, but in paused state until the destination can
     * confirm migration completion.
     */
    VIR_DEBUG("Perform3 %p uri=%s", domain->conn, uri);
    VIR_FREE(cookiein);
    cookiein = cookieout;
    cookieinlen = cookieoutlen;
    cookieout = NULL;
    cookieoutlen = 0;
    /* dconnuri not relevant in non-P2P modes, so left NULL here */
    if (useParams) {
        ret = domain->conn->driver->domainMigratePerform3Params
            (domain, NULL, params, nparams, cookiein, cookieinlen,
             &cookieout, &cookieoutlen, flags | protection);
    } else {
        ret = domain->conn->driver->domainMigratePerform3
            (domain, NULL, cookiein, cookieinlen,
             &cookieout, &cookieoutlen, NULL,
             uri, flags | protection, dname, bandwidth);
    }

    /* Perform failed. Make sure Finish doesn't overwrite the error */
    if (ret < 0) {
        orig_err = virSaveLastError();
        /* Perform failed so we don't need to call confirm to let source know
         * about the failure.
         */
        notify_source = false;
    }

    /* If Perform returns < 0, then we need to cancel the VM
     * startup on the destination
     */
    cancelled = ret < 0 ? 1 : 0;

 finish:
    /*
     * The status code from the source is passed to the destination.
     * The dest can cleanup if the source indicated it failed to
     * send all migration data. Returns NULL for ddomain if
     * the dest was unable to complete migration.
     */
    VIR_DEBUG("Finish3 %p ret=%d", dconn, ret);
    VIR_FREE(cookiein);
    cookiein = cookieout;
    cookieinlen = cookieoutlen;
    cookieout = NULL;
    cookieoutlen = 0;
    if (useParams) {
        if (virTypedParamsGetString(params, nparams,
                                    VIR_MIGRATE_PARAM_DEST_NAME, NULL) <= 0 &&
            virTypedParamsReplaceString(&params, &nparams,
                                        VIR_MIGRATE_PARAM_DEST_NAME,
                                        domain->name) < 0) {
            ddomain = NULL;
        } else {
            ddomain = dconn->driver->domainMigrateFinish3Params
                (dconn, params, nparams, cookiein, cookieinlen,
                 &cookieout, &cookieoutlen, destflags, cancelled);
        }
    } else {
        dname = dname ? dname : domain->name;
        ddomain = dconn->driver->domainMigrateFinish3
            (dconn, dname, cookiein, cookieinlen, &cookieout, &cookieoutlen,
             NULL, uri, destflags, cancelled);
    }
3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194

    if (cancelled) {
        if (ddomain) {
            VIR_ERROR(_("finish step ignored that migration was cancelled"));
        } else {
            /* If Finish reported a useful error, use it instead of the
             * original "migration unexpectedly failed" error.
             *
             * This is ugly but we can't do better with the APIs we have. We
             * only replace the error if Finish was called with cancelled == 1
             * and reported a real error (old libvirt would report an error
             * from RPC instead of MIGRATE_FINISH_OK), which only happens when
             * the domain died on destination. To further reduce a possibility
             * of false positives we also check that Perform returned
             * VIR_ERR_OPERATION_FAILED.
             */
            if (orig_err &&
                orig_err->domain == VIR_FROM_QEMU &&
                orig_err->code == VIR_ERR_OPERATION_FAILED) {
                virErrorPtr err = virGetLastError();
3195 3196
                if (err &&
                    err->domain == VIR_FROM_QEMU &&
3197 3198 3199 3200 3201 3202 3203
                    err->code != VIR_ERR_MIGRATE_FINISH_OK) {
                    virFreeError(orig_err);
                    orig_err = NULL;
                }
            }
        }
    }
3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292

    /* If ddomain is NULL, then we were unable to start
     * the guest on the target, and must restart on the
     * source. There is a small chance that the ddomain
     * is NULL due to an RPC failure, in which case
     * ddomain could in fact be running on the dest.
     * The lock manager plugins should take care of
     * safety in this scenario.
     */
    cancelled = ddomain == NULL ? 1 : 0;

    /* If finish3 set an error, and we don't have an earlier
     * one we need to preserve it in case confirm3 overwrites
     */
    if (!orig_err)
        orig_err = virSaveLastError();

 confirm:
    /*
     * If cancelled, then src VM will be restarted, else it will be killed.
     * Don't do this if migration failed on source and thus it was already
     * cancelled there.
     */
    if (notify_source) {
        VIR_DEBUG("Confirm3 %p ret=%d domain=%p", domain->conn, ret, domain);
        VIR_FREE(cookiein);
        cookiein = cookieout;
        cookieinlen = cookieoutlen;
        cookieout = NULL;
        cookieoutlen = 0;
        if (useParams) {
            ret = domain->conn->driver->domainMigrateConfirm3Params
                (domain, params, nparams, cookiein, cookieinlen,
                 flags | protection, cancelled);
        } else {
            ret = domain->conn->driver->domainMigrateConfirm3
                (domain, cookiein, cookieinlen,
                 flags | protection, cancelled);
        }
        /* If Confirm3 returns -1, there's nothing more we can
         * do, but fortunately worst case is that there is a
         * domain left in 'paused' state on source.
         */
        if (ret < 0) {
            VIR_WARN("Guest %s probably left in 'paused' state on source",
                     domain->name);
        }
    }

 done:
    if (orig_err) {
        virSetError(orig_err);
        virFreeError(orig_err);
    }
    VIR_FREE(dom_xml);
    VIR_FREE(uri_out);
    VIR_FREE(cookiein);
    VIR_FREE(cookieout);
    virTypedParamsFree(params, nparams);
    return ddomain;
}


static virDomainPtr
virDomainMigrateVersion3(virDomainPtr domain,
                         virConnectPtr dconn,
                         const char *xmlin,
                         unsigned long flags,
                         const char *dname,
                         const char *uri,
                         unsigned long bandwidth)
{
    return virDomainMigrateVersion3Full(domain, dconn, xmlin, dname, uri,
                                        bandwidth, NULL, 0, false, flags);
}


static virDomainPtr
virDomainMigrateVersion3Params(virDomainPtr domain,
                               virConnectPtr dconn,
                               virTypedParameterPtr params,
                               int nparams,
                               unsigned int flags)
{
    return virDomainMigrateVersion3Full(domain, dconn, NULL, NULL, NULL, 0,
                                        params, nparams, true, flags);
}


3293
static int
3294 3295 3296 3297 3298 3299 3300 3301 3302
virDomainMigrateCheckNotLocal(const char *dconnuri)
{
    virURIPtr tempuri = NULL;
    int ret = -1;

    if (!(tempuri = virURIParse(dconnuri)))
        goto cleanup;
    if (!tempuri->server || STRPREFIX(tempuri->server, "localhost")) {
        virReportInvalidArg(dconnuri, "%s",
3303
                            _("Attempt to migrate guest to the same host"));
3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314
        goto cleanup;
    }

    ret = 0;

 cleanup:
    virURIFree(tempuri);
    return ret;
}


3315 3316 3317 3318 3319 3320 3321
static int
virDomainMigrateUnmanagedProto2(virDomainPtr domain,
                                const char *dconnuri,
                                virTypedParameterPtr params,
                                int nparams,
                                unsigned int flags)
{
3322 3323 3324 3325
    /* uri parameter is added for direct case */
    const char *compatParams[] = { VIR_MIGRATE_PARAM_DEST_NAME,
                                   VIR_MIGRATE_PARAM_BANDWIDTH,
                                   VIR_MIGRATE_PARAM_URI };
3326 3327 3328 3329 3330
    const char *uri = NULL;
    const char *miguri = NULL;
    const char *dname = NULL;
    unsigned long long bandwidth = 0;

3331 3332 3333 3334 3335 3336 3337 3338
    if (!virTypedParamsCheck(params, nparams, compatParams,
                             ARRAY_CARDINALITY(compatParams))) {
        virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                       _("Some parameters are not supported by migration "
                         "protocol 2"));
        return -1;
    }

3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370
    if (virTypedParamsGetString(params, nparams,
                                VIR_MIGRATE_PARAM_URI, &miguri) < 0 ||
        virTypedParamsGetString(params, nparams,
                                VIR_MIGRATE_PARAM_DEST_NAME, &dname) < 0 ||
        virTypedParamsGetULLong(params, nparams,
                                VIR_MIGRATE_PARAM_BANDWIDTH, &bandwidth) < 0) {
        return -1;
    }

    if (flags & VIR_MIGRATE_PEER2PEER) {
        if (miguri) {
            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                           _("Unable to override peer2peer migration URI"));
            return -1;
        }
        uri = dconnuri;
    } else {
        uri = miguri;
    }

    return domain->conn->driver->domainMigratePerform
            (domain, NULL, 0, uri, flags, dname, bandwidth);
}


static int
virDomainMigrateUnmanagedProto3(virDomainPtr domain,
                                const char *dconnuri,
                                virTypedParameterPtr params,
                                int nparams,
                                unsigned int flags)
{
3371 3372 3373 3374
    const char *compatParams[] = { VIR_MIGRATE_PARAM_URI,
                                   VIR_MIGRATE_PARAM_DEST_NAME,
                                   VIR_MIGRATE_PARAM_DEST_XML,
                                   VIR_MIGRATE_PARAM_BANDWIDTH };
3375 3376 3377 3378 3379
    const char *miguri = NULL;
    const char *dname = NULL;
    const char *xmlin = NULL;
    unsigned long long bandwidth = 0;

3380 3381 3382 3383 3384 3385 3386 3387
    if (!virTypedParamsCheck(params, nparams, compatParams,
                             ARRAY_CARDINALITY(compatParams))) {
        virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                       _("Some parameters are not supported by migration "
                         "protocol 3"));
        return -1;
    }

3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399 3400 3401 3402 3403 3404
    if (virTypedParamsGetString(params, nparams,
                                VIR_MIGRATE_PARAM_URI, &miguri) < 0 ||
        virTypedParamsGetString(params, nparams,
                                VIR_MIGRATE_PARAM_DEST_NAME, &dname) < 0 ||
        virTypedParamsGetString(params, nparams,
                                VIR_MIGRATE_PARAM_DEST_XML, &xmlin) < 0 ||
        virTypedParamsGetULLong(params, nparams,
                                VIR_MIGRATE_PARAM_BANDWIDTH, &bandwidth) < 0) {
        return -1;
    }

    return domain->conn->driver->domainMigratePerform3
            (domain, xmlin, NULL, 0, NULL, NULL, dconnuri,
             miguri, flags, dname, bandwidth);
}


3405 3406 3407 3408
/*
 * In normal migration, the libvirt client co-ordinates communication
 * between the 2 libvirtd instances on source & dest hosts.
 *
3409 3410 3411 3412 3413 3414 3415 3416 3417
 * This function encapsulates 2 alternatives to the above case.
 *
 * 1. peer-2-peer migration, the libvirt client only talks to the source
 * libvirtd instance. The source libvirtd then opens its own
 * connection to the destination and co-ordinates migration itself.
 *
 * 2. direct migration, where there is no requirement for a libvirtd instance
 * on the dest host. Eg, XenD can talk direct to XenD, so libvirtd on dest
 * does not need to be involved at all, or even running.
3418 3419
 */
static int
3420 3421 3422 3423 3424
virDomainMigrateUnmanagedParams(virDomainPtr domain,
                                const char *dconnuri,
                                virTypedParameterPtr params,
                                int nparams,
                                unsigned int flags)
3425
{
3426
    VIR_DOMAIN_DEBUG(domain, "dconnuri=%s, params=%p, nparams=%d, flags=%x",
3427
                     NULLSTR(dconnuri), params, nparams, flags);
3428 3429
    VIR_TYPED_PARAMS_DEBUG(params, nparams);

3430 3431
    if ((flags & VIR_MIGRATE_PEER2PEER) &&
        virDomainMigrateCheckNotLocal(dconnuri) < 0)
3432 3433
        return -1;

3434 3435 3436 3437 3438 3439 3440 3441 3442 3443 3444 3445 3446
    if ((flags & VIR_MIGRATE_PEER2PEER) &&
        VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                 VIR_DRV_FEATURE_MIGRATION_PARAMS)) {
        VIR_DEBUG("Using migration protocol 3 with extensible parameters");
        if (!domain->conn->driver->domainMigratePerform3Params) {
            virReportUnsupportedError();
            return -1;
        }
        return domain->conn->driver->domainMigratePerform3Params
                (domain, dconnuri, params, nparams,
                 NULL, 0, NULL, NULL, flags);
    } else if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                        VIR_DRV_FEATURE_MIGRATION_V3)) {
3447
        VIR_DEBUG("Using migration protocol 3");
3448 3449 3450 3451
        if (!domain->conn->driver->domainMigratePerform3) {
            virReportUnsupportedError();
            return -1;
        }
3452 3453
        return virDomainMigrateUnmanagedProto3(domain, dconnuri,
                                               params, nparams, flags);
3454 3455
    } else {
        VIR_DEBUG("Using migration protocol 2");
3456 3457 3458 3459
        if (!domain->conn->driver->domainMigratePerform) {
            virReportUnsupportedError();
            return -1;
        }
3460 3461
        return virDomainMigrateUnmanagedProto2(domain, dconnuri,
                                               params, nparams, flags);
3462 3463 3464 3465
    }
}


3466 3467 3468 3469 3470 3471 3472 3473 3474 3475 3476 3477 3478 3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493 3494 3495 3496 3497 3498 3499 3500 3501 3502 3503 3504 3505
static int
virDomainMigrateUnmanaged(virDomainPtr domain,
                          const char *xmlin,
                          unsigned int flags,
                          const char *dname,
                          const char *dconnuri,
                          const char *miguri,
                          unsigned long long bandwidth)
{
    int ret = -1;
    virTypedParameterPtr params = NULL;
    int nparams = 0;
    int maxparams = 0;

    if (miguri &&
        virTypedParamsAddString(&params, &nparams, &maxparams,
                                VIR_MIGRATE_PARAM_URI, miguri) < 0)
        goto cleanup;
    if (dname &&
        virTypedParamsAddString(&params, &nparams, &maxparams,
                                VIR_MIGRATE_PARAM_DEST_NAME, dname) < 0)
        goto cleanup;
    if (xmlin &&
        virTypedParamsAddString(&params, &nparams, &maxparams,
                                VIR_MIGRATE_PARAM_DEST_XML, xmlin) < 0)
        goto cleanup;
    if (virTypedParamsAddULLong(&params, &nparams, &maxparams,
                                VIR_MIGRATE_PARAM_BANDWIDTH, bandwidth) < 0)
        goto cleanup;

    ret = virDomainMigrateUnmanagedParams(domain, dconnuri, params,
                                          nparams, flags);

 cleanup:
    virTypedParamsFree(params, nparams);

    return ret;
}


3506 3507 3508 3509 3510 3511 3512 3513 3514 3515 3516 3517
/**
 * virDomainMigrate:
 * @domain: a domain object
 * @dconn: destination host (a connection object)
 * @flags: bitwise-OR of virDomainMigrateFlags
 * @dname: (optional) rename domain to this at destination
 * @uri: (optional) dest hostname/URI as seen from the source host
 * @bandwidth: (optional) specify migration bandwidth limit in MiB/s
 *
 * Migrate the domain object from its current host to the destination
 * host given by dconn (a connection to the destination host).
 *
3518 3519 3520
 * This function is similar to virDomainMigrate3, but it only supports a fixed
 * set of parameters: @dname corresponds to VIR_MIGRATE_PARAM_DEST_NAME, @uri
 * is VIR_MIGRATE_PARAM_URI, and @bandwidth is VIR_MIGRATE_PARAM_BANDWIDTH.
3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552
 *
 * virDomainFree should be used to free the resources after the
 * returned domain object is no longer needed.
 *
 * Returns the new domain object if the migration was successful,
 *   or NULL in case of error.  Note that the new domain object
 *   exists in the scope of the destination connection (dconn).
 */
virDomainPtr
virDomainMigrate(virDomainPtr domain,
                 virConnectPtr dconn,
                 unsigned long flags,
                 const char *dname,
                 const char *uri,
                 unsigned long bandwidth)
{
    virDomainPtr ddomain = NULL;

    VIR_DOMAIN_DEBUG(domain,
                     "dconn=%p, flags=%lx, dname=%s, uri=%s, bandwidth=%lu",
                     dconn, flags, NULLSTR(dname), NULLSTR(uri), bandwidth);

    virResetLastError();

    /* First checkout the source */
    virCheckDomainReturn(domain, NULL);
    virCheckReadOnlyGoto(domain->conn->flags, error);

    /* Now checkout the destination */
    virCheckConnectGoto(dconn, error);
    virCheckReadOnlyGoto(dconn->flags, error);

3553 3554 3555
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_MIGRATE_NON_SHARED_DISK,
                             VIR_MIGRATE_NON_SHARED_INC,
                             error);
3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584

    if (flags & VIR_MIGRATE_OFFLINE) {
        if (!VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                      VIR_DRV_FEATURE_MIGRATION_OFFLINE)) {
            virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                           _("offline migration is not supported by "
                             "the source host"));
            goto error;
        }
        if (!VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
                                      VIR_DRV_FEATURE_MIGRATION_OFFLINE)) {
            virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                           _("offline migration is not supported by "
                             "the destination host"));
            goto error;
        }
    }

    if (flags & VIR_MIGRATE_PEER2PEER) {
        if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                     VIR_DRV_FEATURE_MIGRATION_P2P)) {
            char *dstURI = NULL;
            if (uri == NULL) {
                dstURI = virConnectGetURI(dconn);
                if (!dstURI)
                    return NULL;
            }

            VIR_DEBUG("Using peer2peer migration");
3585 3586
            if (virDomainMigrateUnmanaged(domain, NULL, flags, dname,
                                          uri ? uri : dstURI, NULL, bandwidth) < 0) {
3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670
                VIR_FREE(dstURI);
                goto error;
            }
            VIR_FREE(dstURI);

            ddomain = virDomainLookupByName(dconn, dname ? dname : domain->name);
        } else {
            /* This driver does not support peer to peer migration */
            virReportUnsupportedError();
            goto error;
        }
    } else {
        /* Change protection requires support only on source side, and
         * is only needed in v3 migration, which automatically re-adds
         * the flag for just the source side.  We mask it out for
         * non-peer2peer to allow migration from newer source to an
         * older destination that rejects the flag.  */
        if (flags & VIR_MIGRATE_CHANGE_PROTECTION &&
            !VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                      VIR_DRV_FEATURE_MIGRATE_CHANGE_PROTECTION)) {
            virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                           _("cannot enforce change protection"));
            goto error;
        }
        flags &= ~VIR_MIGRATE_CHANGE_PROTECTION;
        if (flags & VIR_MIGRATE_TUNNELLED) {
            virReportError(VIR_ERR_OPERATION_INVALID, "%s",
                           _("cannot perform tunnelled migration without using peer2peer flag"));
            goto error;
        }

        /* Check that migration is supported by both drivers. */
        if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                     VIR_DRV_FEATURE_MIGRATION_V3) &&
            VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
                                     VIR_DRV_FEATURE_MIGRATION_V3)) {
            VIR_DEBUG("Using migration protocol 3");
            ddomain = virDomainMigrateVersion3(domain, dconn, NULL,
                                               flags, dname, uri, bandwidth);
        } else if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                            VIR_DRV_FEATURE_MIGRATION_V2) &&
                   VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
                                          VIR_DRV_FEATURE_MIGRATION_V2)) {
            VIR_DEBUG("Using migration protocol 2");
            ddomain = virDomainMigrateVersion2(domain, dconn, flags,
                                               dname, uri, bandwidth);
        } else if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                            VIR_DRV_FEATURE_MIGRATION_V1) &&
                   VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
                                            VIR_DRV_FEATURE_MIGRATION_V1)) {
            VIR_DEBUG("Using migration protocol 1");
            ddomain = virDomainMigrateVersion1(domain, dconn, flags,
                                               dname, uri, bandwidth);
        } else {
            /* This driver does not support any migration method */
            virReportUnsupportedError();
            goto error;
        }
    }

    if (ddomain == NULL)
        goto error;

    return ddomain;

 error:
    virDispatchError(domain->conn);
    return NULL;
}


/**
 * virDomainMigrate2:
 * @domain: a domain object
 * @dconn: destination host (a connection object)
 * @flags: bitwise-OR of virDomainMigrateFlags
 * @dxml: (optional) XML config for launching guest on target
 * @dname: (optional) rename domain to this at destination
 * @uri: (optional) dest hostname/URI as seen from the source host
 * @bandwidth: (optional) specify migration bandwidth limit in MiB/s
 *
 * Migrate the domain object from its current host to the destination
 * host given by dconn (a connection to the destination host).
 *
3671 3672 3673 3674
 * This function is similar to virDomainMigrate3, but it only supports a fixed
 * set of parameters: @dxml corresponds to VIR_MIGRATE_PARAM_DEST_XML, @dname
 * is VIR_MIGRATE_PARAM_DEST_NAME, @uri is VIR_MIGRATE_PARAM_URI, and
 * @bandwidth is VIR_MIGRATE_PARAM_BANDWIDTH.
3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707
 *
 * virDomainFree should be used to free the resources after the
 * returned domain object is no longer needed.
 *
 * Returns the new domain object if the migration was successful,
 *   or NULL in case of error.  Note that the new domain object
 *   exists in the scope of the destination connection (dconn).
 */
virDomainPtr
virDomainMigrate2(virDomainPtr domain,
                  virConnectPtr dconn,
                  const char *dxml,
                  unsigned long flags,
                  const char *dname,
                  const char *uri,
                  unsigned long bandwidth)
{
    virDomainPtr ddomain = NULL;

    VIR_DOMAIN_DEBUG(domain,
                     "dconn=%p, flags=%lx, dname=%s, uri=%s, bandwidth=%lu",
                     dconn, flags, NULLSTR(dname), NULLSTR(uri), bandwidth);

    virResetLastError();

    /* First checkout the source */
    virCheckDomainReturn(domain, NULL);
    virCheckReadOnlyGoto(domain->conn->flags, error);

    /* Now checkout the destination */
    virCheckConnectGoto(dconn, error);
    virCheckReadOnlyGoto(dconn->flags, error);

3708 3709 3710
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_MIGRATE_NON_SHARED_DISK,
                             VIR_MIGRATE_NON_SHARED_INC,
                             error);
3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736

    if (flags & VIR_MIGRATE_OFFLINE) {
        if (!VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                      VIR_DRV_FEATURE_MIGRATION_OFFLINE)) {
            virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                           _("offline migration is not supported by "
                             "the source host"));
            goto error;
        }
        if (!VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
                                      VIR_DRV_FEATURE_MIGRATION_OFFLINE)) {
            virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                           _("offline migration is not supported by "
                             "the destination host"));
            goto error;
        }
    }

    if (flags & VIR_MIGRATE_PEER2PEER) {
        if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                     VIR_DRV_FEATURE_MIGRATION_P2P)) {
            char *dstURI = virConnectGetURI(dconn);
            if (!dstURI)
                return NULL;

            VIR_DEBUG("Using peer2peer migration");
3737 3738
            if (virDomainMigrateUnmanaged(domain, dxml, flags, dname,
                                          dstURI, uri, bandwidth) < 0) {
3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828 3829 3830
                VIR_FREE(dstURI);
                goto error;
            }
            VIR_FREE(dstURI);

            ddomain = virDomainLookupByName(dconn, dname ? dname : domain->name);
        } else {
            /* This driver does not support peer to peer migration */
            virReportUnsupportedError();
            goto error;
        }
    } else {
        /* Change protection requires support only on source side, and
         * is only needed in v3 migration, which automatically re-adds
         * the flag for just the source side.  We mask it out for
         * non-peer2peer to allow migration from newer source to an
         * older destination that rejects the flag.  */
        if (flags & VIR_MIGRATE_CHANGE_PROTECTION &&
            !VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                      VIR_DRV_FEATURE_MIGRATE_CHANGE_PROTECTION)) {
            virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                           _("cannot enforce change protection"));
            goto error;
        }
        flags &= ~VIR_MIGRATE_CHANGE_PROTECTION;
        if (flags & VIR_MIGRATE_TUNNELLED) {
            virReportError(VIR_ERR_OPERATION_INVALID, "%s",
                           _("cannot perform tunnelled migration without using peer2peer flag"));
            goto error;
        }

        /* Check that migration is supported by both drivers. */
        if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                     VIR_DRV_FEATURE_MIGRATION_V3) &&
            VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
                                     VIR_DRV_FEATURE_MIGRATION_V3)) {
            VIR_DEBUG("Using migration protocol 3");
            ddomain = virDomainMigrateVersion3(domain, dconn, dxml,
                                               flags, dname, uri, bandwidth);
        } else if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                            VIR_DRV_FEATURE_MIGRATION_V2) &&
                   VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
                                          VIR_DRV_FEATURE_MIGRATION_V2)) {
            VIR_DEBUG("Using migration protocol 2");
            if (dxml) {
                virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                               _("Unable to change target guest XML during migration"));
                goto error;
            }
            ddomain = virDomainMigrateVersion2(domain, dconn, flags,
                                               dname, uri, bandwidth);
        } else if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                            VIR_DRV_FEATURE_MIGRATION_V1) &&
                   VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
                                            VIR_DRV_FEATURE_MIGRATION_V1)) {
            VIR_DEBUG("Using migration protocol 1");
            if (dxml) {
                virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                               _("Unable to change target guest XML during migration"));
                goto error;
            }
            ddomain = virDomainMigrateVersion1(domain, dconn, flags,
                                               dname, uri, bandwidth);
        } else {
            /* This driver does not support any migration method */
            virReportUnsupportedError();
            goto error;
        }
    }

    if (ddomain == NULL)
        goto error;

    return ddomain;

 error:
    virDispatchError(domain->conn);
    return NULL;
}


/**
 * virDomainMigrate3:
 * @domain: a domain object
 * @dconn: destination host (a connection object)
 * @params: (optional) migration parameters
 * @nparams: (optional) number of migration parameters in @params
 * @flags: bitwise-OR of virDomainMigrateFlags
 *
 * Migrate the domain object from its current host to the destination host
 * given by dconn (a connection to the destination host).
 *
3831 3832 3833
 * See VIR_MIGRATE_PARAM_* and virDomainMigrateFlags for detailed description
 * of accepted migration parameters and flags.
 *
3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880
 * See virDomainMigrateFlags documentation for description of individual flags.
 *
 * VIR_MIGRATE_TUNNELLED and VIR_MIGRATE_PEER2PEER are not supported by this
 * API, use virDomainMigrateToURI3 instead.
 *
 * There are many limitations on migration imposed by the underlying
 * technology - for example it may not be possible to migrate between
 * different processors even with the same architecture, or between
 * different types of hypervisor.
 *
 * virDomainFree should be used to free the resources after the
 * returned domain object is no longer needed.
 *
 * Returns the new domain object if the migration was successful,
 *   or NULL in case of error.  Note that the new domain object
 *   exists in the scope of the destination connection (dconn).
 */
virDomainPtr
virDomainMigrate3(virDomainPtr domain,
                  virConnectPtr dconn,
                  virTypedParameterPtr params,
                  unsigned int nparams,
                  unsigned int flags)
{
    virDomainPtr ddomain = NULL;
    const char *compatParams[] = { VIR_MIGRATE_PARAM_URI,
                                   VIR_MIGRATE_PARAM_DEST_NAME,
                                   VIR_MIGRATE_PARAM_DEST_XML,
                                   VIR_MIGRATE_PARAM_BANDWIDTH };
    const char *uri = NULL;
    const char *dname = NULL;
    const char *dxml = NULL;
    unsigned long long bandwidth = 0;

    VIR_DOMAIN_DEBUG(domain, "dconn=%p, params=%p, nparms=%u flags=%x",
                     dconn, params, nparams, flags);
    VIR_TYPED_PARAMS_DEBUG(params, nparams);

    virResetLastError();

    /* First checkout the source */
    virCheckDomainReturn(domain, NULL);
    virCheckReadOnlyGoto(domain->conn->flags, error);

    /* Now checkout the destination */
    virCheckReadOnlyGoto(dconn->flags, error);

3881 3882 3883 3884
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_MIGRATE_NON_SHARED_DISK,
                             VIR_MIGRATE_NON_SHARED_INC,
                             error);

3885 3886 3887 3888 3889 3890 3891 3892 3893 3894 3895 3896 3897 3898 3899 3900 3901 3902 3903 3904 3905 3906 3907 3908 3909 3910 3911 3912 3913 3914 3915 3916 3917 3918 3919 3920 3921 3922 3923 3924 3925 3926 3927 3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 4004 4005 4006 4007 4008 4009 4010
    if (flags & VIR_MIGRATE_PEER2PEER) {
        virReportInvalidArg(flags, "%s",
                            _("use virDomainMigrateToURI3 for peer-to-peer "
                              "migration"));
        goto error;
    }
    if (flags & VIR_MIGRATE_TUNNELLED) {
        virReportInvalidArg(flags, "%s",
                            _("cannot perform tunnelled migration "
                              "without using peer2peer flag"));
        goto error;
    }

    if (flags & VIR_MIGRATE_OFFLINE) {
        if (!VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                      VIR_DRV_FEATURE_MIGRATION_OFFLINE)) {
            virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                           _("offline migration is not supported by "
                             "the source host"));
            goto error;
        }
        if (!VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
                                      VIR_DRV_FEATURE_MIGRATION_OFFLINE)) {
            virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                           _("offline migration is not supported by "
                             "the destination host"));
            goto error;
        }
    }

    /* Change protection requires support only on source side, and
     * is only needed in v3 migration, which automatically re-adds
     * the flag for just the source side.  We mask it out to allow
     * migration from newer source to an older destination that
     * rejects the flag.  */
    if (flags & VIR_MIGRATE_CHANGE_PROTECTION &&
        !VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                  VIR_DRV_FEATURE_MIGRATE_CHANGE_PROTECTION)) {
        virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                       _("cannot enforce change protection"));
        goto error;
    }
    flags &= ~VIR_MIGRATE_CHANGE_PROTECTION;

    /* Prefer extensible API but fall back to older migration APIs if params
     * only contains parameters which were supported by the older API. */
    if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                 VIR_DRV_FEATURE_MIGRATION_PARAMS) &&
        VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
                                 VIR_DRV_FEATURE_MIGRATION_PARAMS)) {
        VIR_DEBUG("Using migration protocol 3 with extensible parameters");
        ddomain = virDomainMigrateVersion3Params(domain, dconn, params,
                                                 nparams, flags);
        goto done;
    }

    if (!virTypedParamsCheck(params, nparams, compatParams,
                             ARRAY_CARDINALITY(compatParams))) {
        virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                       _("Migration APIs with extensible parameters are not "
                         "supported but extended parameters were passed"));
        goto error;
    }

    if (virTypedParamsGetString(params, nparams,
                                VIR_MIGRATE_PARAM_URI, &uri) < 0 ||
        virTypedParamsGetString(params, nparams,
                                VIR_MIGRATE_PARAM_DEST_NAME, &dname) < 0 ||
        virTypedParamsGetString(params, nparams,
                                VIR_MIGRATE_PARAM_DEST_XML, &dxml) < 0 ||
        virTypedParamsGetULLong(params, nparams,
                                VIR_MIGRATE_PARAM_BANDWIDTH, &bandwidth) < 0) {
        goto error;
    }

    if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                 VIR_DRV_FEATURE_MIGRATION_V3) &&
        VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
                                 VIR_DRV_FEATURE_MIGRATION_V3)) {
        VIR_DEBUG("Using migration protocol 3");
        ddomain = virDomainMigrateVersion3(domain, dconn, dxml, flags,
                                           dname, uri, bandwidth);
    } else if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                        VIR_DRV_FEATURE_MIGRATION_V2) &&
               VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
                                      VIR_DRV_FEATURE_MIGRATION_V2)) {
        VIR_DEBUG("Using migration protocol 2");
        if (dxml) {
            virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                           _("Unable to change target guest XML during "
                             "migration"));
            goto error;
        }
        ddomain = virDomainMigrateVersion2(domain, dconn, flags,
                                           dname, uri, bandwidth);
    } else if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                        VIR_DRV_FEATURE_MIGRATION_V1) &&
               VIR_DRV_SUPPORTS_FEATURE(dconn->driver, dconn,
                                        VIR_DRV_FEATURE_MIGRATION_V1)) {
        VIR_DEBUG("Using migration protocol 1");
        if (dxml) {
            virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                           _("Unable to change target guest XML during "
                             "migration"));
            goto error;
        }
        ddomain = virDomainMigrateVersion1(domain, dconn, flags,
                                           dname, uri, bandwidth);
    } else {
        /* This driver does not support any migration method */
        virReportUnsupportedError();
        goto error;
    }

 done:
    if (ddomain == NULL)
        goto error;

    return ddomain;

 error:
    virDispatchError(domain->conn);
    return NULL;
}


4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049
static
int virDomainMigrateUnmanagedCheckCompat(virDomainPtr domain,
                                         unsigned int flags)
{
    VIR_EXCLUSIVE_FLAGS_RET(VIR_MIGRATE_NON_SHARED_DISK,
                            VIR_MIGRATE_NON_SHARED_INC,
                            -1);

    if (flags & VIR_MIGRATE_OFFLINE &&
        !VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                  VIR_DRV_FEATURE_MIGRATION_OFFLINE)) {
        virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                       _("offline migration is not supported by "
                         "the source host"));
        return -1;
    }

    if (flags & VIR_MIGRATE_PEER2PEER) {
        if (!VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                      VIR_DRV_FEATURE_MIGRATION_P2P)) {
            virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                           _("p2p migration is not supported by "
                             "the source host"));
            return -1;
        }
    } else {
        if (!VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                      VIR_DRV_FEATURE_MIGRATION_DIRECT)) {
            virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                           _("direct migration is not supported by "
                             "the source host"));
            return -1;
        }
    }

    return 0;
}


4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060
/**
 * virDomainMigrateToURI:
 * @domain: a domain object
 * @duri: mandatory URI for the destination host
 * @flags: bitwise-OR of virDomainMigrateFlags
 * @dname: (optional) rename domain to this at destination
 * @bandwidth: (optional) specify migration bandwidth limit in MiB/s
 *
 * Migrate the domain object from its current host to the destination
 * host given by duri.
 *
4061 4062 4063
 * This function is similar to virDomainMigrateToURI3, but it only supports a
 * fixed set of parameters: @dname corresponds to VIR_MIGRATE_PARAM_DEST_NAME,
 * and @bandwidth corresponds to VIR_MIGRATE_PARAM_BANDWIDTH.
4064 4065 4066
 *
 * The operation of this API hinges on the VIR_MIGRATE_PEER2PEER flag.
 *
4067 4068 4069 4070
 * If the VIR_MIGRATE_PEER2PEER flag IS set, the @duri parameter must be a
 * valid libvirt connection URI, by which the source libvirt driver can connect
 * to the destination libvirt. In other words, @duri corresponds to @dconnuri
 * of virDomainMigrateToURI3.
4071
 *
4072 4073 4074
 * If the VIR_MIGRATE_PEER2PEER flag is NOT set, the @duri parameter takes a
 * hypervisor specific URI used to initiate the migration. In this case @duri
 * corresponds to VIR_MIGRATE_PARAM_URI of virDomainMigrateToURI3.
4075 4076 4077 4078 4079 4080 4081 4082 4083 4084
 *
 * Returns 0 if the migration succeeded, -1 upon error.
 */
int
virDomainMigrateToURI(virDomainPtr domain,
                      const char *duri,
                      unsigned long flags,
                      const char *dname,
                      unsigned long bandwidth)
{
4085 4086 4087
    const char *dconnuri = NULL;
    const char *miguri = NULL;

4088 4089 4090 4091 4092 4093 4094 4095 4096 4097
    VIR_DOMAIN_DEBUG(domain, "duri=%p, flags=%lx, dname=%s, bandwidth=%lu",
                     NULLSTR(duri), flags, NULLSTR(dname), bandwidth);

    virResetLastError();

    /* First checkout the source */
    virCheckDomainReturn(domain, -1);
    virCheckReadOnlyGoto(domain->conn->flags, error);
    virCheckNonNullArgGoto(duri, error);

4098
    if (virDomainMigrateUnmanagedCheckCompat(domain, flags) < 0)
4099 4100
        goto error;

4101 4102 4103 4104 4105 4106 4107 4108
    if (flags & VIR_MIGRATE_PEER2PEER)
        dconnuri = duri;
    else
        miguri = duri;

    if (virDomainMigrateUnmanaged(domain, NULL, flags,
                                  dname, dconnuri, miguri, bandwidth) < 0)
        goto error;
4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128

    return 0;

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainMigrateToURI2:
 * @domain: a domain object
 * @dconnuri: (optional) URI for target libvirtd if @flags includes VIR_MIGRATE_PEER2PEER
 * @miguri: (optional) URI for invoking the migration, not if @flags includs VIR_MIGRATE_TUNNELLED
 * @dxml: (optional) XML config for launching guest on target
 * @flags: bitwise-OR of virDomainMigrateFlags
 * @dname: (optional) rename domain to this at destination
 * @bandwidth: (optional) specify migration bandwidth limit in MiB/s
 *
 * Migrate the domain object from its current host to the destination
4129
 * host given by @dconnuri.
4130
 *
4131 4132 4133 4134
 * This function is similar to virDomainMigrateToURI3, but it only supports a
 * fixed set of parameters: @miguri corresponds to VIR_MIGRATE_PARAM_URI, @dxml
 * is VIR_MIGRATE_PARAM_DEST_XML, @dname is VIR_MIGRATE_PARAM_DEST_NAME, and
 * @bandwidth corresponds to VIR_MIGRATE_PARAM_BANDWIDTH.
4135 4136 4137
 *
 * The operation of this API hinges on the VIR_MIGRATE_PEER2PEER flag.
 *
4138 4139 4140 4141
 * If the VIR_MIGRATE_PEER2PEER flag IS set, the @dconnuri parameter must be a
 * valid libvirt connection URI, by which the source libvirt driver can connect
 * to the destination libvirt. In other words, @dconnuri has the same semantics
 * as in virDomainMigrateToURI3.
4142
 *
4143 4144 4145 4146
 * If the VIR_MIGRATE_PEER2PEER flag is NOT set, the @dconnuri must be NULL
 * and the @miguri parameter takes a hypervisor specific URI used to initiate
 * the migration. In this case @miguri corresponds to VIR_MIGRATE_PARAM_URI of
 * virDomainMigrateToURI3.
4147 4148 4149 4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161 4162 4163 4164 4165 4166 4167 4168 4169
 *
 * Returns 0 if the migration succeeded, -1 upon error.
 */
int
virDomainMigrateToURI2(virDomainPtr domain,
                       const char *dconnuri,
                       const char *miguri,
                       const char *dxml,
                       unsigned long flags,
                       const char *dname,
                       unsigned long bandwidth)
{
    VIR_DOMAIN_DEBUG(domain, "dconnuri=%s, miguri=%s, dxml=%s, "
                     "flags=%lx, dname=%s, bandwidth=%lu",
                     NULLSTR(dconnuri), NULLSTR(miguri), NULLSTR(dxml),
                     flags, NULLSTR(dname), bandwidth);

    virResetLastError();

    /* First checkout the source */
    virCheckDomainReturn(domain, -1);
    virCheckReadOnlyGoto(domain->conn->flags, error);

4170 4171
    if (virDomainMigrateUnmanagedCheckCompat(domain, flags) < 0)
        goto error;
4172

4173 4174 4175
    if (flags & VIR_MIGRATE_PEER2PEER)
        virCheckNonNullArgGoto(dconnuri, error);
    else
4176 4177
        dconnuri = NULL;

4178
    if (virDomainMigrateUnmanaged(domain, dxml, flags,
4179 4180
                                  dname, dconnuri, miguri, bandwidth) < 0)
        goto error;
4181 4182 4183 4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200

    return 0;

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainMigrateToURI3:
 * @domain: a domain object
 * @dconnuri: (optional) URI for target libvirtd if @flags includes VIR_MIGRATE_PEER2PEER
 * @params: (optional) migration parameters
 * @nparams: (optional) number of migration parameters in @params
 * @flags: bitwise-OR of virDomainMigrateFlags
 *
 * Migrate the domain object from its current host to the destination host
 * given by URI.
 *
4201 4202
 * See VIR_MIGRATE_PARAM_* and virDomainMigrateFlags for detailed description
 * of accepted migration parameters and flags.
4203 4204 4205 4206 4207 4208 4209 4210 4211
 *
 * The operation of this API hinges on the VIR_MIGRATE_PEER2PEER flag.
 *
 * If the VIR_MIGRATE_PEER2PEER flag is set, the @dconnuri parameter must be a
 * valid libvirt connection URI, by which the source libvirt daemon can connect
 * to the destination libvirt.
 *
 * If the VIR_MIGRATE_PEER2PEER flag is NOT set, then @dconnuri must be NULL
 * and VIR_MIGRATE_PARAM_URI migration parameter must be filled in with
4212 4213 4214 4215 4216 4217
 * hypervisor specific URI used to initiate the migration. The uri_transports
 * element of the hypervisor capabilities XML includes supported URI schemes.
 * This is called "direct" migration. Not all hypervisors support this mode of
 * migration, so if the VIR_MIGRATE_PEER2PEER flag is not set, then it may be
 * necessary to use the alternative virDomainMigrate3 API providing an explicit
 * virConnectPtr for the destination host.
4218
 *
4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238 4239 4240 4241 4242
 * There are many limitations on migration imposed by the underlying
 * technology - for example it may not be possible to migrate between
 * different processors even with the same architecture, or between
 * different types of hypervisor.
 *
 * Returns 0 if the migration succeeded, -1 upon error.
 */
int
virDomainMigrateToURI3(virDomainPtr domain,
                       const char *dconnuri,
                       virTypedParameterPtr params,
                       unsigned int nparams,
                       unsigned int flags)
{
    VIR_DOMAIN_DEBUG(domain, "dconnuri=%s, params=%p, nparms=%u flags=%x",
                     NULLSTR(dconnuri), params, nparams, flags);
    VIR_TYPED_PARAMS_DEBUG(params, nparams);

    virResetLastError();

    /* First checkout the source */
    virCheckDomainReturn(domain, -1);
    virCheckReadOnlyGoto(domain->conn->flags, error);

4243 4244
    if (virDomainMigrateUnmanagedCheckCompat(domain, flags) < 0)
        goto error;
4245

4246 4247 4248
    if (flags & VIR_MIGRATE_PEER2PEER)
        virCheckNonNullArgGoto(dconnuri, error);
    else
4249
        dconnuri = NULL;
4250

4251
    if (virDomainMigrateUnmanagedParams(domain, dconnuri,
4252
                                        params, nparams, flags) < 0)
4253
        goto error;
4254 4255 4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 4285 4286 4287 4288 4289 4290 4291 4292 4293 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 4305 4306 4307 4308 4309 4310 4311 4312 4313 4314 4315 4316 4317 4318 4319 4320 4321 4322 4323 4324 4325 4326 4327 4328 4329 4330 4331 4332 4333 4334 4335 4336 4337 4338 4339 4340 4341 4342 4343 4344 4345 4346 4347 4348 4349 4350 4351 4352 4353 4354 4355 4356 4357 4358 4359 4360 4361

    return 0;

 error:
    virDispatchError(domain->conn);
    return -1;
}


/*
 * Not for public use.  This function is part of the internal
 * implementation of migration in the remote case.
 */
int
virDomainMigratePrepare(virConnectPtr dconn,
                        char **cookie,
                        int *cookielen,
                        const char *uri_in,
                        char **uri_out,
                        unsigned long flags,
                        const char *dname,
                        unsigned long bandwidth)
{
    VIR_DEBUG("dconn=%p, cookie=%p, cookielen=%p, uri_in=%s, uri_out=%p, "
              "flags=%lx, dname=%s, bandwidth=%lu", dconn, cookie, cookielen,
              NULLSTR(uri_in), uri_out, flags, NULLSTR(dname), bandwidth);

    virResetLastError();

    virCheckConnectReturn(dconn, -1);
    virCheckReadOnlyGoto(dconn->flags, error);

    if (dconn->driver->domainMigratePrepare) {
        int ret;
        ret = dconn->driver->domainMigratePrepare(dconn, cookie, cookielen,
                                                  uri_in, uri_out,
                                                  flags, dname, bandwidth);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dconn);
    return -1;
}


/*
 * Not for public use.  This function is part of the internal
 * implementation of migration in the remote case.
 */
int
virDomainMigratePerform(virDomainPtr domain,
                        const char *cookie,
                        int cookielen,
                        const char *uri,
                        unsigned long flags,
                        const char *dname,
                        unsigned long bandwidth)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "cookie=%p, cookielen=%d, uri=%s, flags=%lx, "
                     "dname=%s, bandwidth=%lu", cookie, cookielen, uri, flags,
                     NULLSTR(dname), bandwidth);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainMigratePerform) {
        int ret;
        ret = conn->driver->domainMigratePerform(domain, cookie, cookielen,
                                                 uri,
                                                 flags, dname, bandwidth);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/*
 * Not for public use.  This function is part of the internal
 * implementation of migration in the remote case.
 */
virDomainPtr
virDomainMigrateFinish(virConnectPtr dconn,
                       const char *dname,
                       const char *cookie,
                       int cookielen,
                       const char *uri,
                       unsigned long flags)
{
    VIR_DEBUG("dconn=%p, dname=%s, cookie=%p, cookielen=%d, uri=%s, "
              "flags=%lx", dconn, NULLSTR(dname), cookie, cookielen,
4362
              NULLSTR(uri), flags);
4363 4364 4365 4366 4367 4368 4369 4370 4371 4372 4373 4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399 4400 4401 4402 4403

    virResetLastError();

    virCheckConnectReturn(dconn, NULL);
    virCheckReadOnlyGoto(dconn->flags, error);

    if (dconn->driver->domainMigrateFinish) {
        virDomainPtr ret;
        ret = dconn->driver->domainMigrateFinish(dconn, dname,
                                                 cookie, cookielen,
                                                 uri, flags);
        if (!ret)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dconn);
    return NULL;
}


/*
 * Not for public use.  This function is part of the internal
 * implementation of migration in the remote case.
 */
int
virDomainMigratePrepare2(virConnectPtr dconn,
                         char **cookie,
                         int *cookielen,
                         const char *uri_in,
                         char **uri_out,
                         unsigned long flags,
                         const char *dname,
                         unsigned long bandwidth,
                         const char *dom_xml)
{
    VIR_DEBUG("dconn=%p, cookie=%p, cookielen=%p, uri_in=%s, uri_out=%p,"
              "flags=%lx, dname=%s, bandwidth=%lu, dom_xml=%s", dconn,
4404 4405
              cookie, cookielen, NULLSTR(uri_in), uri_out, flags, NULLSTR(dname),
              bandwidth, NULLSTR(dom_xml));
4406 4407 4408 4409 4410 4411 4412 4413 4414 4415 4416 4417 4418 4419 4420 4421 4422 4423 4424 4425 4426 4427 4428 4429 4430 4431 4432 4433 4434 4435 4436 4437 4438 4439 4440 4441 4442 4443 4444 4445

    virResetLastError();

    virCheckConnectReturn(dconn, -1);
    virCheckReadOnlyGoto(dconn->flags, error);

    if (dconn->driver->domainMigratePrepare2) {
        int ret;
        ret = dconn->driver->domainMigratePrepare2(dconn, cookie, cookielen,
                                                   uri_in, uri_out,
                                                   flags, dname, bandwidth,
                                                   dom_xml);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dconn);
    return -1;
}


/*
 * Not for public use.  This function is part of the internal
 * implementation of migration in the remote case.
 */
virDomainPtr
virDomainMigrateFinish2(virConnectPtr dconn,
                        const char *dname,
                        const char *cookie,
                        int cookielen,
                        const char *uri,
                        unsigned long flags,
                        int retcode)
{
    VIR_DEBUG("dconn=%p, dname=%s, cookie=%p, cookielen=%d, uri=%s, "
              "flags=%lx, retcode=%d", dconn, NULLSTR(dname), cookie,
4446
              cookielen, NULLSTR(uri), flags, retcode);
4447 4448 4449 4450 4451 4452 4453 4454 4455 4456 4457 4458 4459 4460 4461 4462 4463 4464 4465 4466 4467 4468 4469 4470 4471 4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485

    virResetLastError();

    virCheckConnectReturn(dconn, NULL);
    virCheckReadOnlyGoto(dconn->flags, error);

    if (dconn->driver->domainMigrateFinish2) {
        virDomainPtr ret;
        ret = dconn->driver->domainMigrateFinish2(dconn, dname,
                                                  cookie, cookielen,
                                                  uri, flags,
                                                  retcode);
        if (!ret && !retcode)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dconn);
    return NULL;
}


/*
 * Not for public use.  This function is part of the internal
 * implementation of migration in the remote case.
 */
int
virDomainMigratePrepareTunnel(virConnectPtr conn,
                              virStreamPtr st,
                              unsigned long flags,
                              const char *dname,
                              unsigned long bandwidth,
                              const char *dom_xml)
{
    VIR_DEBUG("conn=%p, stream=%p, flags=%lx, dname=%s, "
              "bandwidth=%lu, dom_xml=%s", conn, st, flags,
4486
              NULLSTR(dname), bandwidth, NULLSTR(dom_xml));
4487 4488 4489 4490 4491 4492 4493

    virResetLastError();

    virCheckConnectReturn(conn, -1);
    virCheckReadOnlyGoto(conn->flags, error);

    if (conn != st->conn) {
4494 4495
        virReportInvalidArg(conn, "%s",
                            _("conn must match stream connection"));
4496 4497 4498 4499 4500 4501 4502 4503 4504 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527 4528 4529 4530 4531 4532 4533 4534 4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581
        goto error;
    }

    if (conn->driver->domainMigratePrepareTunnel) {
        int rv = conn->driver->domainMigratePrepareTunnel(conn, st,
                                                          flags, dname,
                                                          bandwidth, dom_xml);
        if (rv < 0)
            goto error;
        return rv;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return -1;
}


/*
 * Not for public use.  This function is part of the internal
 * implementation of migration in the remote case.
 */
char *
virDomainMigrateBegin3(virDomainPtr domain,
                       const char *xmlin,
                       char **cookieout,
                       int *cookieoutlen,
                       unsigned long flags,
                       const char *dname,
                       unsigned long bandwidth)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "xmlin=%s cookieout=%p, cookieoutlen=%p, "
                     "flags=%lx, dname=%s, bandwidth=%lu",
                     NULLSTR(xmlin), cookieout, cookieoutlen, flags,
                     NULLSTR(dname), bandwidth);

    virResetLastError();

    virCheckDomainReturn(domain, NULL);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainMigrateBegin3) {
        char *xml;
        xml = conn->driver->domainMigrateBegin3(domain, xmlin,
                                                cookieout, cookieoutlen,
                                                flags, dname, bandwidth);
        VIR_DEBUG("xml %s", NULLSTR(xml));
        if (!xml)
            goto error;
        return xml;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return NULL;
}


/*
 * Not for public use.  This function is part of the internal
 * implementation of migration in the remote case.
 */
int
virDomainMigratePrepare3(virConnectPtr dconn,
                         const char *cookiein,
                         int cookieinlen,
                         char **cookieout,
                         int *cookieoutlen,
                         const char *uri_in,
                         char **uri_out,
                         unsigned long flags,
                         const char *dname,
                         unsigned long bandwidth,
                         const char *dom_xml)
{
    VIR_DEBUG("dconn=%p, cookiein=%p, cookieinlen=%d, cookieout=%p, "
              "cookieoutlen=%p, uri_in=%s, uri_out=%p, flags=%lx, dname=%s, "
              "bandwidth=%lu, dom_xml=%s",
4582 4583
              dconn, cookiein, cookieinlen, cookieout, cookieoutlen, NULLSTR(uri_in),
              uri_out, flags, NULLSTR(dname), bandwidth, NULLSTR(dom_xml));
4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607 4608 4609 4610 4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630

    virResetLastError();

    virCheckConnectReturn(dconn, -1);
    virCheckReadOnlyGoto(dconn->flags, error);

    if (dconn->driver->domainMigratePrepare3) {
        int ret;
        ret = dconn->driver->domainMigratePrepare3(dconn,
                                                   cookiein, cookieinlen,
                                                   cookieout, cookieoutlen,
                                                   uri_in, uri_out,
                                                   flags, dname, bandwidth,
                                                   dom_xml);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dconn);
    return -1;
}


/*
 * Not for public use.  This function is part of the internal
 * implementation of migration in the remote case.
 */
int
virDomainMigratePrepareTunnel3(virConnectPtr conn,
                               virStreamPtr st,
                               const char *cookiein,
                               int cookieinlen,
                               char **cookieout,
                               int *cookieoutlen,
                               unsigned long flags,
                               const char *dname,
                               unsigned long bandwidth,
                               const char *dom_xml)
{
    VIR_DEBUG("conn=%p, stream=%p, cookiein=%p, cookieinlen=%d, cookieout=%p, "
              "cookieoutlen=%p, flags=%lx, dname=%s, bandwidth=%lu, "
              "dom_xml=%s",
              conn, st, cookiein, cookieinlen, cookieout, cookieoutlen, flags,
4631
              NULLSTR(dname), bandwidth, NULLSTR(dom_xml));
4632 4633 4634 4635 4636 4637 4638

    virResetLastError();

    virCheckConnectReturn(conn, -1);
    virCheckReadOnlyGoto(conn->flags, error);

    if (conn != st->conn) {
4639 4640
        virReportInvalidArg(conn, "%s",
                            _("conn must match stream connection"));
4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655 4656 4657 4658 4659 4660 4661 4662 4663 4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744 4745 4746 4747 4748 4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770 4771 4772 4773 4774 4775 4776 4777 4778 4779 4780 4781 4782 4783 4784 4785 4786 4787 4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804 4805 4806 4807 4808 4809 4810 4811 4812 4813 4814 4815 4816 4817 4818 4819 4820 4821 4822 4823 4824 4825 4826 4827 4828 4829 4830 4831 4832 4833 4834 4835 4836 4837 4838 4839 4840 4841 4842 4843 4844 4845 4846 4847 4848 4849 4850 4851 4852 4853 4854 4855 4856 4857 4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869 4870 4871 4872 4873 4874 4875 4876 4877 4878 4879 4880 4881 4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917 4918 4919 4920
        goto error;
    }

    if (conn->driver->domainMigratePrepareTunnel3) {
        int rv = conn->driver->domainMigratePrepareTunnel3(conn, st,
                                                           cookiein, cookieinlen,
                                                           cookieout, cookieoutlen,
                                                           flags, dname,
                                                           bandwidth, dom_xml);
        if (rv < 0)
            goto error;
        return rv;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return -1;
}


/*
 * Not for public use.  This function is part of the internal
 * implementation of migration in the remote case.
 */
int
virDomainMigratePerform3(virDomainPtr domain,
                         const char *xmlin,
                         const char *cookiein,
                         int cookieinlen,
                         char **cookieout,
                         int *cookieoutlen,
                         const char *dconnuri,
                         const char *uri,
                         unsigned long flags,
                         const char *dname,
                         unsigned long bandwidth)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "xmlin=%s cookiein=%p, cookieinlen=%d, "
                     "cookieout=%p, cookieoutlen=%p, dconnuri=%s, "
                     "uri=%s, flags=%lx, dname=%s, bandwidth=%lu",
                     NULLSTR(xmlin), cookiein, cookieinlen,
                     cookieout, cookieoutlen, NULLSTR(dconnuri),
                     NULLSTR(uri), flags, NULLSTR(dname), bandwidth);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainMigratePerform3) {
        int ret;
        ret = conn->driver->domainMigratePerform3(domain, xmlin,
                                                  cookiein, cookieinlen,
                                                  cookieout, cookieoutlen,
                                                  dconnuri, uri,
                                                  flags, dname, bandwidth);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/*
 * Not for public use.  This function is part of the internal
 * implementation of migration in the remote case.
 */
virDomainPtr
virDomainMigrateFinish3(virConnectPtr dconn,
                        const char *dname,
                        const char *cookiein,
                        int cookieinlen,
                        char **cookieout,
                        int *cookieoutlen,
                        const char *dconnuri,
                        const char *uri,
                        unsigned long flags,
                        int cancelled)
{
    VIR_DEBUG("dconn=%p, dname=%s, cookiein=%p, cookieinlen=%d, cookieout=%p,"
              "cookieoutlen=%p, dconnuri=%s, uri=%s, flags=%lx, retcode=%d",
              dconn, NULLSTR(dname), cookiein, cookieinlen, cookieout,
              cookieoutlen, NULLSTR(dconnuri), NULLSTR(uri), flags, cancelled);

    virResetLastError();

    virCheckConnectReturn(dconn, NULL);
    virCheckReadOnlyGoto(dconn->flags, error);

    if (dconn->driver->domainMigrateFinish3) {
        virDomainPtr ret;
        ret = dconn->driver->domainMigrateFinish3(dconn, dname,
                                                  cookiein, cookieinlen,
                                                  cookieout, cookieoutlen,
                                                  dconnuri, uri, flags,
                                                  cancelled);
        if (!ret && !cancelled)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dconn);
    return NULL;
}


/*
 * Not for public use.  This function is part of the internal
 * implementation of migration in the remote case.
 */
int
virDomainMigrateConfirm3(virDomainPtr domain,
                         const char *cookiein,
                         int cookieinlen,
                         unsigned long flags,
                         int cancelled)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain,
                     "cookiein=%p, cookieinlen=%d, flags=%lx, cancelled=%d",
                     cookiein, cookieinlen, flags, cancelled);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainMigrateConfirm3) {
        int ret;
        ret = conn->driver->domainMigrateConfirm3(domain,
                                                  cookiein, cookieinlen,
                                                  flags, cancelled);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/*
 * Not for public use.  This function is part of the internal
 * implementation of migration in the remote case.
 */
char *
virDomainMigrateBegin3Params(virDomainPtr domain,
                             virTypedParameterPtr params,
                             int nparams,
                             char **cookieout,
                             int *cookieoutlen,
                             unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d, "
                     "cookieout=%p, cookieoutlen=%p, flags=%x",
                     params, nparams, cookieout, cookieoutlen, flags);
    VIR_TYPED_PARAMS_DEBUG(params, nparams);

    virResetLastError();

    virCheckDomainReturn(domain, NULL);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainMigrateBegin3Params) {
        char *xml;
        xml = conn->driver->domainMigrateBegin3Params(domain, params, nparams,
                                                      cookieout, cookieoutlen,
                                                      flags);
        VIR_DEBUG("xml %s", NULLSTR(xml));
        if (!xml)
            goto error;
        return xml;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return NULL;
}


/*
 * Not for public use.  This function is part of the internal
 * implementation of migration in the remote case.
 */
int
virDomainMigratePrepare3Params(virConnectPtr dconn,
                               virTypedParameterPtr params,
                               int nparams,
                               const char *cookiein,
                               int cookieinlen,
                               char **cookieout,
                               int *cookieoutlen,
                               char **uri_out,
                               unsigned int flags)
{
    VIR_DEBUG("dconn=%p, params=%p, nparams=%d, cookiein=%p, cookieinlen=%d, "
              "cookieout=%p, cookieoutlen=%p, uri_out=%p, flags=%x",
              dconn, params, nparams, cookiein, cookieinlen,
              cookieout, cookieoutlen, uri_out, flags);
    VIR_TYPED_PARAMS_DEBUG(params, nparams);

    virResetLastError();

    virCheckConnectReturn(dconn, -1);
    virCheckReadOnlyGoto(dconn->flags, error);

    if (dconn->driver->domainMigratePrepare3Params) {
        int ret;
        ret = dconn->driver->domainMigratePrepare3Params(dconn, params, nparams,
                                                         cookiein, cookieinlen,
                                                         cookieout, cookieoutlen,
                                                         uri_out, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dconn);
    return -1;
}


/*
 * Not for public use.  This function is part of the internal
 * implementation of migration in the remote case.
 */
int
virDomainMigratePrepareTunnel3Params(virConnectPtr conn,
                                     virStreamPtr st,
                                     virTypedParameterPtr params,
                                     int nparams,
                                     const char *cookiein,
                                     int cookieinlen,
                                     char **cookieout,
                                     int *cookieoutlen,
                                     unsigned int flags)
{
    VIR_DEBUG("conn=%p, stream=%p, params=%p, nparams=%d, cookiein=%p, "
              "cookieinlen=%d, cookieout=%p, cookieoutlen=%p, flags=%x",
              conn, st, params, nparams, cookiein, cookieinlen,
              cookieout, cookieoutlen, flags);
    VIR_TYPED_PARAMS_DEBUG(params, nparams);

    virResetLastError();

    virCheckConnectReturn(conn, -1);
    virCheckReadOnlyGoto(conn->flags, error);

    if (conn != st->conn) {
4921 4922
        virReportInvalidArg(conn, "%s",
                            _("conn must match stream connection"));
4923 4924 4925 4926 4927 4928 4929 4930 4931 4932 4933 4934 4935 4936 4937 4938 4939 4940 4941 4942 4943 4944 4945 4946 4947 4948 4949 4950 4951 4952 4953 4954 4955 4956 4957 4958 4959 4960 4961 4962 4963 4964 4965 4966 4967 4968 4969 4970 4971 4972 4973 4974 4975 4976 4977 4978 4979 4980 4981 4982 4983 4984 4985 4986 4987 4988 4989 4990 4991 4992 4993 4994 4995 4996 4997 4998 4999 5000 5001 5002 5003 5004 5005 5006 5007 5008 5009 5010 5011 5012 5013 5014 5015 5016 5017 5018 5019 5020 5021 5022 5023 5024 5025 5026 5027 5028 5029 5030 5031 5032 5033 5034 5035 5036 5037 5038 5039 5040 5041 5042 5043 5044 5045 5046 5047 5048 5049 5050 5051 5052 5053 5054 5055 5056 5057 5058 5059 5060 5061 5062 5063 5064 5065 5066 5067 5068 5069 5070 5071 5072 5073 5074 5075 5076 5077 5078 5079 5080 5081 5082 5083 5084 5085 5086 5087 5088 5089 5090 5091 5092 5093 5094 5095 5096 5097 5098 5099 5100 5101 5102 5103 5104 5105 5106 5107 5108 5109 5110 5111 5112 5113 5114 5115 5116 5117 5118 5119 5120 5121 5122 5123 5124 5125 5126 5127 5128 5129 5130 5131 5132 5133 5134 5135 5136 5137 5138 5139 5140 5141 5142 5143 5144 5145 5146 5147 5148 5149 5150 5151 5152 5153 5154 5155 5156 5157 5158 5159 5160 5161 5162 5163 5164 5165 5166 5167 5168 5169 5170 5171 5172 5173 5174 5175 5176 5177 5178 5179 5180 5181 5182 5183 5184 5185 5186 5187 5188 5189 5190 5191 5192 5193 5194 5195 5196 5197 5198 5199 5200 5201 5202 5203 5204 5205 5206 5207 5208 5209 5210 5211 5212 5213 5214 5215 5216 5217 5218 5219 5220 5221 5222 5223 5224 5225
        goto error;
    }

    if (conn->driver->domainMigratePrepareTunnel3Params) {
        int rv;
        rv = conn->driver->domainMigratePrepareTunnel3Params(
                conn, st, params, nparams, cookiein, cookieinlen,
                cookieout, cookieoutlen, flags);
        if (rv < 0)
            goto error;
        return rv;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return -1;
}


/*
 * Not for public use.  This function is part of the internal
 * implementation of migration in the remote case.
 */
int
virDomainMigratePerform3Params(virDomainPtr domain,
                               const char *dconnuri,
                               virTypedParameterPtr params,
                               int nparams,
                               const char *cookiein,
                               int cookieinlen,
                               char **cookieout,
                               int *cookieoutlen,
                               unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "dconnuri=%s, params=%p, nparams=%d, cookiein=%p, "
                     "cookieinlen=%d, cookieout=%p, cookieoutlen=%p, flags=%x",
                     NULLSTR(dconnuri), params, nparams, cookiein,
                     cookieinlen, cookieout, cookieoutlen, flags);
    VIR_TYPED_PARAMS_DEBUG(params, nparams);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainMigratePerform3Params) {
        int ret;
        ret = conn->driver->domainMigratePerform3Params(
                domain, dconnuri, params, nparams, cookiein, cookieinlen,
                cookieout, cookieoutlen, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/*
 * Not for public use.  This function is part of the internal
 * implementation of migration in the remote case.
 */
virDomainPtr
virDomainMigrateFinish3Params(virConnectPtr dconn,
                              virTypedParameterPtr params,
                              int nparams,
                              const char *cookiein,
                              int cookieinlen,
                              char **cookieout,
                              int *cookieoutlen,
                              unsigned int flags,
                              int cancelled)
{
    VIR_DEBUG("dconn=%p, params=%p, nparams=%d, cookiein=%p, cookieinlen=%d, "
              "cookieout=%p, cookieoutlen=%p, flags=%x, cancelled=%d",
              dconn, params, nparams, cookiein, cookieinlen, cookieout,
              cookieoutlen, flags, cancelled);
    VIR_TYPED_PARAMS_DEBUG(params, nparams);

    virResetLastError();

    virCheckConnectReturn(dconn, NULL);
    virCheckReadOnlyGoto(dconn->flags, error);

    if (dconn->driver->domainMigrateFinish3Params) {
        virDomainPtr ret;
        ret = dconn->driver->domainMigrateFinish3Params(
                dconn, params, nparams, cookiein, cookieinlen,
                cookieout, cookieoutlen, flags, cancelled);
        if (!ret && !cancelled)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dconn);
    return NULL;
}


/*
 * Not for public use.  This function is part of the internal
 * implementation of migration in the remote case.
 */
int
virDomainMigrateConfirm3Params(virDomainPtr domain,
                               virTypedParameterPtr params,
                               int nparams,
                               const char *cookiein,
                               int cookieinlen,
                               unsigned int flags,
                               int cancelled)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d, cookiein=%p, "
                     "cookieinlen=%d, flags=%x, cancelled=%d",
                     params, nparams, cookiein, cookieinlen, flags, cancelled);
    VIR_TYPED_PARAMS_DEBUG(params, nparams);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainMigrateConfirm3Params) {
        int ret;
        ret = conn->driver->domainMigrateConfirm3Params(
                domain, params, nparams,
                cookiein, cookieinlen, flags, cancelled);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetSchedulerType:
 * @domain: pointer to domain object
 * @nparams: pointer to number of scheduler parameters, can be NULL
 *           (return value)
 *
 * Get the scheduler type and the number of scheduler parameters.
 *
 * Returns NULL in case of error. The caller must free the returned string.
 */
char *
virDomainGetSchedulerType(virDomainPtr domain, int *nparams)
{
    virConnectPtr conn;
    char *schedtype;

    VIR_DOMAIN_DEBUG(domain, "nparams=%p", nparams);

    virResetLastError();

    virCheckDomainReturn(domain, NULL);
    conn = domain->conn;

    if (conn->driver->domainGetSchedulerType) {
        schedtype = conn->driver->domainGetSchedulerType(domain, nparams);
        if (!schedtype)
            goto error;
        return schedtype;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return NULL;
}


/**
 * virDomainGetSchedulerParameters:
 * @domain: pointer to domain object
 * @params: pointer to scheduler parameter objects
 *          (return value)
 * @nparams: pointer to number of scheduler parameter objects
 *          (this value should generally be as large as the returned value
 *           nparams of virDomainGetSchedulerType()); input and output
 *
 * Get all scheduler parameters.  On input, @nparams gives the size of the
 * @params array; on output, @nparams gives how many slots were filled
 * with parameter information, which might be less but will not exceed
 * the input value.  @nparams cannot be 0.
 *
 * It is hypervisor specific whether this returns the live or
 * persistent state; for more control, use
 * virDomainGetSchedulerParametersFlags().
 *
 * Returns -1 in case of error, 0 in case of success.
 */
int
virDomainGetSchedulerParameters(virDomainPtr domain,
                                virTypedParameterPtr params, int *nparams)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%p", params, nparams);

    virResetLastError();

    virCheckDomainReturn(domain, -1);

    virCheckNonNullArgGoto(params, error);
    virCheckNonNullArgGoto(nparams, error);
    virCheckPositiveArgGoto(*nparams, error);

    conn = domain->conn;

    if (conn->driver->domainGetSchedulerParameters) {
        int ret;
        ret = conn->driver->domainGetSchedulerParameters(domain, params, nparams);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetSchedulerParametersFlags:
 * @domain: pointer to domain object
 * @params: pointer to scheduler parameter object
 *          (return value)
 * @nparams: pointer to number of scheduler parameter
 *          (this value should be same than the returned value
 *           nparams of virDomainGetSchedulerType()); input and output
 * @flags: bitwise-OR of virDomainModificationImpact and virTypedParameterFlags
 *
 * Get all scheduler parameters.  On input, @nparams gives the size of the
 * @params array; on output, @nparams gives how many slots were filled
 * with parameter information, which might be less but will not exceed
 * the input value.  @nparams cannot be 0.
 *
 * The value of @flags can be exactly VIR_DOMAIN_AFFECT_CURRENT,
 * VIR_DOMAIN_AFFECT_LIVE, or VIR_DOMAIN_AFFECT_CONFIG.
 *
 * Here is a sample code snippet:
 *
 *   char *ret = virDomainGetSchedulerType(dom, &nparams);
 *   if (ret && nparams != 0) {
 *       if ((params = malloc(sizeof(*params) * nparams)) == NULL)
 *           goto error;
 *       memset(params, 0, sizeof(*params) * nparams);
 *       if (virDomainGetSchedulerParametersFlags(dom, params, &nparams, 0))
 *           goto error;
 *   }
 *
 * Returns -1 in case of error, 0 in case of success.
 */
int
virDomainGetSchedulerParametersFlags(virDomainPtr domain,
                                     virTypedParameterPtr params, int *nparams,
                                     unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%p, flags=%x",
                     params, nparams, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);

    virCheckNonNullArgGoto(params, error);
    virCheckNonNullArgGoto(nparams, error);
    virCheckPositiveArgGoto(*nparams, error);

    if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                 VIR_DRV_FEATURE_TYPED_PARAM_STRING))
        flags |= VIR_TYPED_PARAM_STRING_OKAY;

5226 5227 5228 5229
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_AFFECT_LIVE,
                             VIR_DOMAIN_AFFECT_CONFIG,
                             error);

5230 5231 5232 5233 5234 5235 5236 5237 5238 5239 5240 5241 5242 5243 5244 5245 5246 5247 5248 5249 5250 5251 5252 5253 5254 5255 5256 5257 5258 5259 5260 5261 5262 5263 5264 5265 5266 5267 5268 5269 5270 5271 5272 5273 5274 5275 5276 5277 5278 5279 5280 5281 5282 5283 5284 5285 5286 5287 5288 5289 5290 5291 5292 5293 5294 5295 5296 5297 5298 5299 5300 5301 5302 5303 5304 5305 5306 5307 5308 5309 5310 5311 5312 5313 5314 5315 5316 5317 5318 5319 5320 5321 5322 5323 5324 5325 5326 5327 5328 5329 5330 5331 5332 5333 5334 5335 5336 5337 5338 5339 5340 5341 5342 5343 5344 5345 5346 5347 5348 5349 5350 5351 5352 5353 5354 5355 5356 5357 5358 5359 5360 5361 5362 5363 5364 5365 5366 5367 5368 5369 5370 5371 5372 5373 5374 5375 5376 5377 5378 5379 5380 5381 5382 5383 5384 5385 5386 5387 5388 5389 5390 5391 5392 5393 5394 5395 5396 5397 5398 5399 5400 5401 5402 5403 5404
    conn = domain->conn;

    if (conn->driver->domainGetSchedulerParametersFlags) {
        int ret;
        ret = conn->driver->domainGetSchedulerParametersFlags(domain, params,
                                                              nparams, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainSetSchedulerParameters:
 * @domain: pointer to domain object
 * @params: pointer to scheduler parameter objects
 * @nparams: number of scheduler parameter objects
 *          (this value can be the same or less than the returned value
 *           nparams of virDomainGetSchedulerType)
 *
 * Change all or a subset or the scheduler parameters.  It is
 * hypervisor-specific whether this sets live, persistent, or both
 * settings; for more control, use
 * virDomainSetSchedulerParametersFlags.
 *
 * Returns -1 in case of error, 0 in case of success.
 */
int
virDomainSetSchedulerParameters(virDomainPtr domain,
                                virTypedParameterPtr params, int nparams)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d", params, nparams);
    VIR_TYPED_PARAMS_DEBUG(params, nparams);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(params, error);
    virCheckNonNegativeArgGoto(nparams, error);

    if (virTypedParameterValidateSet(conn, params, nparams) < 0)
        goto error;

    if (conn->driver->domainSetSchedulerParameters) {
        int ret;
        ret = conn->driver->domainSetSchedulerParameters(domain, params, nparams);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainSetSchedulerParametersFlags:
 * @domain: pointer to domain object
 * @params: pointer to scheduler parameter objects
 * @nparams: number of scheduler parameter objects
 *          (this value can be the same or less than the returned value
 *           nparams of virDomainGetSchedulerType)
 * @flags: bitwise-OR of virDomainModificationImpact
 *
 * Change a subset or all scheduler parameters.  The value of @flags
 * should be either VIR_DOMAIN_AFFECT_CURRENT, or a bitwise-or of
 * values from VIR_DOMAIN_AFFECT_LIVE and
 * VIR_DOMAIN_AFFECT_CURRENT, although hypervisors vary in which
 * flags are supported.
 *
 * Returns -1 in case of error, 0 in case of success.
 */
int
virDomainSetSchedulerParametersFlags(virDomainPtr domain,
                                     virTypedParameterPtr params,
                                     int nparams,
                                     unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d, flags=%x",
                     params, nparams, flags);
    VIR_TYPED_PARAMS_DEBUG(params, nparams);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(params, error);
    virCheckNonNegativeArgGoto(nparams, error);

    if (virTypedParameterValidateSet(conn, params, nparams) < 0)
        goto error;

    if (conn->driver->domainSetSchedulerParametersFlags) {
        int ret;
        ret = conn->driver->domainSetSchedulerParametersFlags(domain,
                                                              params,
                                                              nparams,
                                                              flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainBlockStats:
 * @dom: pointer to the domain object
 * @disk: path to the block device, or device shorthand
 * @stats: block device stats (returned)
 * @size: size of stats structure
 *
 * This function returns block device (disk) stats for block
 * devices attached to the domain.
 *
 * The @disk parameter is either the device target shorthand (the
 * <target dev='...'/> sub-element, such as "vda"), or (since 0.9.8)
 * an unambiguous source name of the block device (the <source
 * file='...'/> sub-element, such as "/path/to/image").  Valid names
 * can be found by calling virDomainGetXMLDesc() and inspecting
 * elements within //domain/devices/disk. Some drivers might also
 * accept the empty string for the @disk parameter, and then yield
 * summary stats for the entire domain.
 *
 * Domains may have more than one block device.  To get stats for
 * each you should make multiple calls to this function.
 *
 * Individual fields within the stats structure may be returned
 * as -1, which indicates that the hypervisor does not support
 * that particular statistic.
 *
 * Returns: 0 in case of success or -1 in case of failure.
 */
int
virDomainBlockStats(virDomainPtr dom, const char *disk,
                    virDomainBlockStatsPtr stats, size_t size)
{
    virConnectPtr conn;
    virDomainBlockStatsStruct stats2 = { -1, -1, -1, -1, -1 };

    VIR_DOMAIN_DEBUG(dom, "disk=%s, stats=%p, size=%zi", disk, stats, size);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    virCheckNonNullArgGoto(disk, error);
    virCheckNonNullArgGoto(stats, error);
    if (size > sizeof(stats2)) {
        virReportInvalidArg(size,
5405 5406
                            _("size must not exceed %zu"),
                            sizeof(stats2));
5407 5408 5409 5410 5411 5412 5413 5414 5415 5416 5417 5418 5419 5420 5421 5422 5423 5424 5425 5426 5427 5428 5429 5430 5431 5432 5433 5434 5435 5436 5437 5438 5439 5440 5441 5442 5443 5444 5445 5446 5447 5448 5449 5450 5451 5452 5453 5454 5455 5456 5457 5458 5459 5460 5461 5462 5463 5464 5465 5466 5467 5468 5469 5470 5471 5472 5473 5474 5475 5476 5477 5478 5479 5480 5481 5482 5483 5484 5485 5486 5487 5488 5489 5490 5491 5492 5493 5494 5495 5496 5497 5498 5499 5500 5501 5502 5503 5504 5505 5506 5507 5508 5509 5510 5511 5512 5513 5514 5515 5516 5517 5518 5519 5520 5521 5522 5523 5524 5525 5526 5527 5528 5529 5530 5531 5532 5533 5534 5535 5536 5537 5538 5539 5540 5541 5542 5543 5544 5545
        goto error;
    }
    conn = dom->conn;

    if (conn->driver->domainBlockStats) {
        if (conn->driver->domainBlockStats(dom, disk, &stats2) == -1)
            goto error;

        memcpy(stats, &stats2, size);
        return 0;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainBlockStatsFlags:
 * @dom: pointer to domain object
 * @disk: path to the block device, or device shorthand
 * @params: pointer to block stats parameter object
 *          (return value, allocated by the caller)
 * @nparams: pointer to number of block stats; input and output
 * @flags: bitwise-OR of virTypedParameterFlags
 *
 * This function is to get block stats parameters for block
 * devices attached to the domain.
 *
 * The @disk parameter is either the device target shorthand (the
 * <target dev='...'/> sub-element, such as "vda"), or (since 0.9.8)
 * an unambiguous source name of the block device (the <source
 * file='...'/> sub-element, such as "/path/to/image").  Valid names
 * can be found by calling virDomainGetXMLDesc() and inspecting
 * elements within //domain/devices/disk. Some drivers might also
 * accept the empty string for the @disk parameter, and then yield
 * summary stats for the entire domain.
 *
 * Domains may have more than one block device.  To get stats for
 * each you should make multiple calls to this function.
 *
 * On input, @nparams gives the size of the @params array; on output,
 * @nparams gives how many slots were filled with parameter
 * information, which might be less but will not exceed the input
 * value.
 *
 * As a special case, calling with @params as NULL and @nparams as 0 on
 * input will cause @nparams on output to contain the number of parameters
 * supported by the hypervisor. (Note that block devices of different types
 * might support different parameters, so it might be necessary to compute
 * @nparams for each block device). The caller should then allocate @params
 * array, i.e. (sizeof(@virTypedParameter) * @nparams) bytes and call the API
 * again. See virDomainGetMemoryParameters() for more details.
 *
 * Returns -1 in case of error, 0 in case of success.
 */
int
virDomainBlockStatsFlags(virDomainPtr dom,
                         const char *disk,
                         virTypedParameterPtr params,
                         int *nparams,
                         unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(dom, "disk=%s, params=%p, nparams=%d, flags=%x",
                     disk, params, nparams ? *nparams : -1, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    virCheckNonNullArgGoto(disk, error);
    virCheckNonNullArgGoto(nparams, error);
    virCheckNonNegativeArgGoto(*nparams, error);
    if (*nparams != 0)
        virCheckNonNullArgGoto(params, error);

    if (VIR_DRV_SUPPORTS_FEATURE(dom->conn->driver, dom->conn,
                                 VIR_DRV_FEATURE_TYPED_PARAM_STRING))
        flags |= VIR_TYPED_PARAM_STRING_OKAY;
    conn = dom->conn;

    if (conn->driver->domainBlockStatsFlags) {
        int ret;
        ret = conn->driver->domainBlockStatsFlags(dom, disk, params, nparams, flags);
        if (ret < 0)
            goto error;
        return ret;
    }
    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainInterfaceStats:
 * @dom: pointer to the domain object
 * @path: path to the interface
 * @stats: network interface stats (returned)
 * @size: size of stats structure
 *
 * This function returns network interface stats for interfaces
 * attached to the domain.
 *
 * The path parameter is the name of the network interface.
 *
 * Domains may have more than one network interface.  To get stats for
 * each you should make multiple calls to this function.
 *
 * Individual fields within the stats structure may be returned
 * as -1, which indicates that the hypervisor does not support
 * that particular statistic.
 *
 * Returns: 0 in case of success or -1 in case of failure.
 */
int
virDomainInterfaceStats(virDomainPtr dom, const char *path,
                        virDomainInterfaceStatsPtr stats, size_t size)
{
    virConnectPtr conn;
    virDomainInterfaceStatsStruct stats2 = { -1, -1, -1, -1,
                                             -1, -1, -1, -1 };

    VIR_DOMAIN_DEBUG(dom, "path=%s, stats=%p, size=%zi",
                     path, stats, size);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    virCheckNonNullArgGoto(path, error);
    virCheckNonNullArgGoto(stats, error);
    if (size > sizeof(stats2)) {
        virReportInvalidArg(size,
5546 5547
                            _("size must not exceed %zu"),
                            sizeof(stats2));
5548 5549 5550 5551 5552 5553 5554 5555 5556 5557 5558 5559 5560 5561 5562 5563 5564 5565 5566 5567 5568 5569 5570 5571 5572 5573 5574 5575 5576 5577 5578 5579 5580 5581 5582 5583 5584 5585 5586 5587 5588 5589 5590 5591 5592 5593 5594 5595 5596 5597 5598 5599 5600 5601 5602 5603 5604 5605 5606 5607 5608 5609 5610 5611 5612 5613 5614 5615 5616 5617 5618 5619 5620 5621 5622 5623 5624 5625 5626 5627 5628 5629 5630 5631 5632 5633 5634 5635 5636 5637 5638 5639 5640 5641 5642 5643 5644 5645 5646 5647 5648 5649 5650 5651 5652 5653 5654 5655 5656 5657 5658 5659 5660 5661 5662 5663 5664 5665 5666 5667 5668 5669 5670 5671 5672 5673 5674 5675 5676 5677 5678 5679 5680 5681 5682 5683 5684 5685 5686 5687 5688 5689 5690 5691 5692 5693 5694 5695 5696 5697 5698 5699 5700 5701 5702 5703 5704 5705 5706 5707 5708 5709 5710 5711 5712 5713 5714 5715 5716 5717 5718 5719 5720 5721 5722 5723 5724
        goto error;
    }

    conn = dom->conn;

    if (conn->driver->domainInterfaceStats) {
        if (conn->driver->domainInterfaceStats(dom, path, &stats2) == -1)
            goto error;

        memcpy(stats, &stats2, size);
        return 0;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainSetInterfaceParameters:
 * @domain: pointer to domain object
 * @device: the interface name or mac address
 * @params: pointer to interface parameter objects
 * @nparams: number of interface parameter (this value can be the same or
 *          less than the number of parameters supported)
 * @flags: bitwise-OR of virDomainModificationImpact
 *
 * Change a subset or all parameters of interface; currently this
 * includes bandwidth parameters.  The value of @flags should be
 * either VIR_DOMAIN_AFFECT_CURRENT, or a bitwise-or of values
 * VIR_DOMAIN_AFFECT_LIVE and VIR_DOMAIN_AFFECT_CONFIG, although
 * hypervisors vary in which flags are supported.
 *
 * This function may require privileged access to the hypervisor.
 *
 * Returns -1 in case of error, 0 in case of success.
 */
int
virDomainSetInterfaceParameters(virDomainPtr domain,
                                const char *device,
                                virTypedParameterPtr params,
                                int nparams, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "device=%s, params=%p, nparams=%d, flags=%x",
                     device, params, nparams, flags);
    VIR_TYPED_PARAMS_DEBUG(params, nparams);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(params, error);
    virCheckPositiveArgGoto(nparams, error);

    if (virTypedParameterValidateSet(conn, params, nparams) < 0)
        goto error;

    if (conn->driver->domainSetInterfaceParameters) {
        int ret;
        ret = conn->driver->domainSetInterfaceParameters(domain, device,
                                                         params, nparams,
                                                         flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetInterfaceParameters:
 * @domain: pointer to domain object
 * @device: the interface name or mac address
 * @params: pointer to interface parameter objects
 *          (return value, allocated by the caller)
 * @nparams: pointer to number of interface parameter; input and output
 * @flags: bitwise-OR of virDomainModificationImpact and virTypedParameterFlags
 *
 * Get all interface parameters. On input, @nparams gives the size of
 * the @params array; on output, @nparams gives how many slots were
 * filled with parameter information, which might be less but will not
 * exceed the input value.
 *
 * As a special case, calling with @params as NULL and @nparams as 0 on
 * input will cause @nparams on output to contain the number of parameters
 * supported by the hypervisor. The caller should then allocate @params
 * array, i.e. (sizeof(@virTypedParameter) * @nparams) bytes and call the
 * API again. See virDomainGetMemoryParameters() for an equivalent usage
 * example.
 *
 * This function may require privileged access to the hypervisor. This function
 * expects the caller to allocate the @params.
 *
 * Returns -1 in case of error, 0 in case of success.
 */
int
virDomainGetInterfaceParameters(virDomainPtr domain,
                                const char *device,
                                virTypedParameterPtr params,
                                int *nparams, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "device=%s, params=%p, nparams=%d, flags=%x",
                     device, params, (nparams) ? *nparams : -1, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    virCheckNonNullArgGoto(nparams, error);
    virCheckNonNegativeArgGoto(*nparams, error);
    if (*nparams != 0)
        virCheckNonNullArgGoto(params, error);

    if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                 VIR_DRV_FEATURE_TYPED_PARAM_STRING))
        flags |= VIR_TYPED_PARAM_STRING_OKAY;

    conn = domain->conn;

    if (conn->driver->domainGetInterfaceParameters) {
        int ret;
        ret = conn->driver->domainGetInterfaceParameters(domain, device,
                                                         params, nparams,
                                                         flags);
        if (ret < 0)
            goto error;
        return ret;
    }
    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainMemoryStats:
 * @dom: pointer to the domain object
 * @stats: nr_stats-sized array of stat structures (returned)
 * @nr_stats: number of memory statistics requested
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * This function provides memory statistics for the domain.
 *
 * Up to 'nr_stats' elements of 'stats' will be populated with memory statistics
 * from the domain.  Only statistics supported by the domain, the driver, and
 * this version of libvirt will be returned.
 *
 * Memory Statistics:
 *
 * VIR_DOMAIN_MEMORY_STAT_SWAP_IN:
 *     The total amount of data read from swap space (in kb).
 * VIR_DOMAIN_MEMORY_STAT_SWAP_OUT:
 *     The total amount of memory written out to swap space (in kb).
 * VIR_DOMAIN_MEMORY_STAT_MAJOR_FAULT:
 *     The number of page faults that required disk IO to service.
 * VIR_DOMAIN_MEMORY_STAT_MINOR_FAULT:
 *     The number of page faults serviced without disk IO.
 * VIR_DOMAIN_MEMORY_STAT_UNUSED:
 *     The amount of memory which is not being used for any purpose (in kb).
 * VIR_DOMAIN_MEMORY_STAT_AVAILABLE:
 *     The total amount of memory available to the domain's OS (in kb).
5725
 * VIR_DOMAIN_MEMORY_STAT_USABLE:
5726
 *     How much the balloon can be inflated without pushing the guest system
5727
 *     to swap, corresponds to 'Available' in /proc/meminfo
5728 5729
 * VIR_DOMAIN_MEMORY_STAT_ACTUAL_BALLOON:
 *     Current balloon value (in kb).
5730 5731
 * VIR_DOMAIN_MEMORY_STAT_LAST_UPDATE
 *     Timestamp of the last statistic
5732 5733 5734 5735 5736 5737 5738 5739 5740 5741 5742 5743 5744 5745 5746 5747 5748 5749 5750 5751 5752 5753 5754 5755 5756 5757 5758 5759 5760 5761 5762 5763 5764 5765 5766 5767 5768 5769 5770 5771 5772 5773 5774 5775 5776 5777 5778 5779 5780 5781 5782 5783 5784 5785 5786 5787 5788 5789 5790 5791 5792 5793 5794 5795 5796 5797 5798 5799 5800 5801 5802 5803 5804 5805 5806 5807 5808 5809 5810 5811 5812 5813 5814 5815 5816 5817 5818
 *
 * Returns: The number of stats provided or -1 in case of failure.
 */
int
virDomainMemoryStats(virDomainPtr dom, virDomainMemoryStatPtr stats,
                     unsigned int nr_stats, unsigned int flags)
{
    virConnectPtr conn;
    unsigned long nr_stats_ret = 0;

    VIR_DOMAIN_DEBUG(dom, "stats=%p, nr_stats=%u, flags=%x",
                     stats, nr_stats, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);

    if (!stats || nr_stats == 0)
        return 0;

    if (nr_stats > VIR_DOMAIN_MEMORY_STAT_NR)
        nr_stats = VIR_DOMAIN_MEMORY_STAT_NR;

    conn = dom->conn;
    if (conn->driver->domainMemoryStats) {
        nr_stats_ret = conn->driver->domainMemoryStats(dom, stats, nr_stats,
                                                       flags);
        if (nr_stats_ret == -1)
            goto error;
        return nr_stats_ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainBlockPeek:
 * @dom: pointer to the domain object
 * @disk: path to the block device, or device shorthand
 * @offset: offset within block device
 * @size: size to read
 * @buffer: return buffer (must be at least size bytes)
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * This function allows you to read the contents of a domain's
 * disk device.
 *
 * Typical uses for this are to determine if the domain has
 * written a Master Boot Record (indicating that the domain
 * has completed installation), or to try to work out the state
 * of the domain's filesystems.
 *
 * (Note that in the local case you might try to open the
 * block device or file directly, but that won't work in the
 * remote case, nor if you don't have sufficient permission.
 * Hence the need for this call).
 *
 * The @disk parameter is either an unambiguous source name of the
 * block device (the <source file='...'/> sub-element, such as
 * "/path/to/image"), or (since 0.9.5) the device target shorthand
 * (the <target dev='...'/> sub-element, such as "vda").  Valid names
 * can be found by calling virDomainGetXMLDesc() and inspecting
 * elements within //domain/devices/disk.
 *
 * 'offset' and 'size' represent an area which must lie entirely
 * within the device or file.  'size' may be 0 to test if the
 * call would succeed.
 *
 * 'buffer' is the return buffer and must be at least 'size' bytes.
 *
 * NB. The remote driver imposes a 64K byte limit on 'size'.
 * For your program to be able to work reliably over a remote
 * connection you should split large requests to <= 65536 bytes.
 * However, with 0.9.13 this RPC limit has been raised to 1M byte.
 * Starting with version 1.0.6 the RPC limit has been raised again.
 * Now large requests up to 16M byte are supported.
 *
 * Returns: 0 in case of success or -1 in case of failure.
 */
int
virDomainBlockPeek(virDomainPtr dom,
                   const char *disk,
5819
                   unsigned long long offset,
5820 5821 5822 5823 5824 5825 5826 5827 5828 5829 5830 5831 5832 5833 5834
                   size_t size,
                   void *buffer,
                   unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(dom, "disk=%s, offset=%lld, size=%zi, buffer=%p, flags=%x",
                     disk, offset, size, buffer, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    conn = dom->conn;

    virCheckReadOnlyGoto(conn->flags, error);
5835
    virCheckNonEmptyStringArgGoto(disk, error);
5836 5837 5838 5839 5840 5841 5842 5843 5844 5845 5846 5847 5848 5849 5850 5851 5852 5853 5854 5855 5856 5857 5858 5859 5860 5861 5862 5863 5864 5865 5866 5867 5868 5869 5870 5871 5872 5873 5874 5875 5876 5877 5878 5879 5880 5881 5882 5883 5884 5885 5886 5887 5888 5889 5890 5891 5892 5893 5894 5895 5896 5897 5898 5899 5900 5901 5902 5903 5904 5905 5906 5907 5908 5909 5910 5911 5912 5913 5914 5915 5916 5917 5918 5919 5920 5921 5922 5923 5924 5925 5926 5927 5928 5929 5930 5931 5932 5933 5934 5935 5936 5937 5938 5939 5940 5941 5942 5943 5944 5945 5946 5947 5948 5949 5950 5951 5952 5953 5954

    /* Allow size == 0 as an access test. */
    if (size > 0)
        virCheckNonNullArgGoto(buffer, error);

    if (conn->driver->domainBlockPeek) {
        int ret;
        ret = conn->driver->domainBlockPeek(dom, disk, offset, size,
                                            buffer, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainBlockResize:
 * @dom: pointer to the domain object
 * @disk: path to the block image, or shorthand
 * @size: new size of the block image, see below for unit
 * @flags: bitwise-OR of virDomainBlockResizeFlags
 *
 * Resize a block device of domain while the domain is running.  If
 * @flags is 0, then @size is in kibibytes (blocks of 1024 bytes);
 * since 0.9.11, if @flags includes VIR_DOMAIN_BLOCK_RESIZE_BYTES,
 * @size is in bytes instead.  @size is taken directly as the new
 * size.  Depending on the file format, the hypervisor may round up
 * to the next alignment boundary.
 *
 * The @disk parameter is either an unambiguous source name of the
 * block device (the <source file='...'/> sub-element, such as
 * "/path/to/image"), or (since 0.9.5) the device target shorthand
 * (the <target dev='...'/> sub-element, such as "vda").  Valid names
 * can be found by calling virDomainGetXMLDesc() and inspecting
 * elements within //domain/devices/disk.
 *
 * Note that this call may fail if the underlying virtualization hypervisor
 * does not support it; this call requires privileged access to the
 * hypervisor.
 *
 * Returns: 0 in case of success or -1 in case of failure.
 */
int
virDomainBlockResize(virDomainPtr dom,
                     const char *disk,
                     unsigned long long size,
                     unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(dom, "disk=%s, size=%llu, flags=%x", disk, size, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    conn = dom->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(disk, error);

    if (conn->driver->domainBlockResize) {
        int ret;
        ret = conn->driver->domainBlockResize(dom, disk, size, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainMemoryPeek:
 * @dom: pointer to the domain object
 * @start: start of memory to peek
 * @size: size of memory to peek
 * @buffer: return buffer (must be at least size bytes)
 * @flags: bitwise-OR of virDomainMemoryFlags
 *
 * This function allows you to read the contents of a domain's
 * memory.
 *
 * The memory which is read is controlled by the 'start', 'size'
 * and 'flags' parameters.
 *
 * If 'flags' is VIR_MEMORY_VIRTUAL then the 'start' and 'size'
 * parameters are interpreted as virtual memory addresses for
 * whichever task happens to be running on the domain at the
 * moment.  Although this sounds haphazard it is in fact what
 * you want in order to read Linux kernel state, because it
 * ensures that pointers in the kernel image can be interpreted
 * coherently.
 *
 * 'buffer' is the return buffer and must be at least 'size' bytes.
 * 'size' may be 0 to test if the call would succeed.
 *
 * NB. The remote driver imposes a 64K byte limit on 'size'.
 * For your program to be able to work reliably over a remote
 * connection you should split large requests to <= 65536 bytes.
 * However, with 0.9.13 this RPC limit has been raised to 1M byte.
 * Starting with version 1.0.6 the RPC limit has been raised again.
 * Now large requests up to 16M byte are supported.
 *
 * Returns: 0 in case of success or -1 in case of failure.
 */
int
virDomainMemoryPeek(virDomainPtr dom,
5955
                    unsigned long long start,
5956 5957 5958 5959 5960 5961 5962 5963 5964 5965 5966 5967 5968 5969 5970 5971 5972 5973 5974 5975 5976 5977 5978 5979 5980 5981 5982 5983 5984 5985 5986 5987 5988 5989 5990 5991 5992 5993 5994
                    size_t size,
                    void *buffer,
                    unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(dom, "start=%lld, size=%zi, buffer=%p, flags=%x",
                     start, size, buffer, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    conn = dom->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    /* Note on access to physical memory: A VIR_MEMORY_PHYSICAL flag is
     * a possibility.  However it isn't really useful unless the caller
     * can also access registers, particularly CR3 on x86 in order to
     * get the Page Table Directory.  Since registers are different on
     * every architecture, that would imply another call to get the
     * machine registers.
     *
     * The QEMU driver handles VIR_MEMORY_VIRTUAL, mapping it
     * to the qemu 'memsave' command which does the virtual to physical
     * mapping inside qemu.
     *
     * The QEMU driver also handles VIR_MEMORY_PHYSICAL, mapping it
     * to the qemu 'pmemsave' command.
     *
     * At time of writing there is no Xen driver.  However the Xen
     * hypervisor only lets you map physical pages from other domains,
     * and so the Xen driver would have to do the virtual to physical
     * mapping by chasing 2, 3 or 4-level page tables from the PTD.
     * There is example code in libxc (xc_translate_foreign_address)
     * which does this, although we cannot copy this code directly
     * because of incompatible licensing.
     */

5995
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_MEMORY_VIRTUAL, VIR_MEMORY_PHYSICAL, error);
5996 5997 5998 5999 6000 6001 6002 6003 6004 6005 6006 6007 6008 6009 6010 6011 6012 6013 6014 6015 6016 6017 6018 6019 6020 6021 6022 6023 6024 6025 6026 6027 6028 6029 6030 6031 6032 6033 6034 6035 6036 6037 6038 6039 6040 6041 6042 6043 6044 6045 6046 6047 6048 6049 6050 6051 6052 6053 6054 6055 6056 6057 6058 6059 6060 6061 6062 6063 6064 6065 6066 6067 6068 6069 6070 6071 6072 6073 6074 6075 6076 6077 6078 6079 6080 6081 6082 6083 6084 6085 6086 6087 6088 6089 6090 6091 6092 6093 6094 6095 6096 6097 6098 6099 6100 6101 6102

    /* Allow size == 0 as an access test. */
    if (size > 0)
        virCheckNonNullArgGoto(buffer, error);

    if (conn->driver->domainMemoryPeek) {
        int ret;
        ret = conn->driver->domainMemoryPeek(dom, start, size,
                                             buffer, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainGetBlockInfo:
 * @domain: a domain object
 * @disk: path to the block device, or device shorthand
 * @info: pointer to a virDomainBlockInfo structure allocated by the user
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Extract information about a domain's block device.
 *
 * The @disk parameter is either an unambiguous source name of the
 * block device (the <source file='...'/> sub-element, such as
 * "/path/to/image"), or (since 0.9.5) the device target shorthand
 * (the <target dev='...'/> sub-element, such as "vda").  Valid names
 * can be found by calling virDomainGetXMLDesc() and inspecting
 * elements within //domain/devices/disk.
 *
 * For QEMU domains, the allocation and physical virDomainBlockInfo
 * values returned will generally be the same, except when using a
 * non raw, block backing device, such as qcow2 for an active domain.
 * When the persistent domain is not active, QEMU will return the
 * default which is the same value for allocation and physical.
 *
 * Active QEMU domains can return an allocation value which is more
 * representative of the currently used blocks by the device compared
 * to the physical size of the device. Applications can use/monitor
 * the allocation value with the understanding that if the domain
 * becomes inactive during an attempt to get the value, the default
 * values will be returned. Thus, the application should check
 * after the call for the domain being inactive if the values are
 * the same. Optionally, the application could be watching for a
 * shutdown event and then ignore any values received afterwards.
 * This can be an issue when a domain is being migrated and the
 * exact timing of the domain being made inactive and check of
 * the allocation value results the default being returned. For
 * a transient domain in the similar situation, this call will return
 * -1 and an error message indicating the "domain is not running".
 *
 * The following is some pseudo code illustrating the call sequence:
 *
 *   ...
 *   virDomainPtr dom;
 *   virDomainBlockInfo info;
 *   char *device;
 *   ...
 *   // Either get a list of all domains or a specific domain
 *   // via a virDomainLookupBy*() call.
 *   //
 *   // It's also required to fill in the device pointer, but that's
 *   // specific to the implementation. For the purposes of this example
 *   // a qcow2 backed device name string would need to be provided.
 *   ...
 *   // If the following call is made on a persistent domain with a
 *   // qcow2 block backed block device, then it's possible the returned
 *   // allocation equals the physical value. In that case, the domain
 *   // that may have been active prior to calling has become inactive,
 *   // such as is the case during a domain migration. Thus once we
 *   // get data returned, check for active domain when the values are
 *   // the same.
 *   if (virDomainGetBlockInfo(dom, device, &info, 0) < 0)
 *       goto failure;
 *   if (info.allocation == info.physical) {
 *       // If the domain is no longer active,
 *       // then the defaults are being returned.
 *       if (!virDomainIsActive())
 *               goto ignore_return;
 *   }
 *   // Do something with the allocation and physical values
 *   ...
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainGetBlockInfo(virDomainPtr domain, const char *disk,
                      virDomainBlockInfoPtr info, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "info=%p, flags=%x", info, flags);

    virResetLastError();

    if (info)
        memset(info, 0, sizeof(*info));

    virCheckDomainReturn(domain, -1);
6103
    virCheckNonEmptyStringArgGoto(disk, error);
6104 6105 6106 6107 6108 6109 6110 6111 6112 6113 6114 6115 6116 6117 6118 6119 6120 6121 6122 6123 6124 6125 6126 6127 6128 6129 6130 6131 6132 6133 6134 6135 6136 6137 6138 6139 6140 6141 6142 6143 6144 6145 6146
    virCheckNonNullArgGoto(info, error);

    conn = domain->conn;

    if (conn->driver->domainGetBlockInfo) {
        int ret;
        ret = conn->driver->domainGetBlockInfo(domain, disk, info, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainDefineXML:
 * @conn: pointer to the hypervisor connection
 * @xml: the XML description for the domain, preferably in UTF-8
 *
 * Define a domain, but does not start it.
 * This definition is persistent, until explicitly undefined with
 * virDomainUndefine(). A previous definition for this domain would be
 * overridden if it already exists.
 *
 * Some hypervisors may prevent this operation if there is a current
 * block copy operation on a transient domain with the same id as the
 * domain being defined; in that case, use virDomainBlockJobAbort() to
 * stop the block copy first.
 *
 * virDomainFree should be used to free the resources after the
 * domain object is no longer needed.
 *
 * Returns NULL in case of error, a pointer to the domain otherwise
 */
virDomainPtr
virDomainDefineXML(virConnectPtr conn, const char *xml)
{
6147
    VIR_DEBUG("conn=%p, xml=%s", conn, NULLSTR(xml));
6148 6149 6150 6151 6152 6153 6154 6155 6156 6157 6158 6159 6160 6161 6162 6163 6164 6165 6166 6167 6168 6169 6170

    virResetLastError();

    virCheckConnectReturn(conn, NULL);
    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(xml, error);

    if (conn->driver->domainDefineXML) {
        virDomainPtr ret;
        ret = conn->driver->domainDefineXML(conn, xml);
        if (!ret)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return NULL;
}


6171 6172 6173 6174
/**
 * virDomainDefineXMLFlags:
 * @conn: pointer to the hypervisor connection
 * @xml: the XML description for the domain, preferably in UTF-8
6175
 * @flags: bitwise OR of the virDomainDefineFlags constants
6176 6177 6178 6179 6180 6181 6182 6183 6184 6185 6186 6187 6188 6189 6190 6191 6192 6193 6194
 *
 * Defines a domain, but does not start it.
 * This definition is persistent, until explicitly undefined with
 * virDomainUndefine(). A previous definition for this domain would be
 * overridden if it already exists.
 *
 * Some hypervisors may prevent this operation if there is a current
 * block copy operation on a transient domain with the same id as the
 * domain being defined; in that case, use virDomainBlockJobAbort() to
 * stop the block copy first.
 *
 * virDomainFree should be used to free the resources after the
 * domain object is no longer needed.
 *
 * Returns NULL in case of error, a pointer to the domain otherwise
 */
virDomainPtr
virDomainDefineXMLFlags(virConnectPtr conn, const char *xml, unsigned int flags)
{
6195
    VIR_DEBUG("conn=%p, xml=%s flags=%x", conn, NULLSTR(xml), flags);
6196 6197 6198 6199 6200 6201 6202 6203 6204 6205 6206 6207 6208 6209 6210 6211 6212 6213 6214 6215 6216 6217 6218

    virResetLastError();

    virCheckConnectReturn(conn, NULL);
    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(xml, error);

    if (conn->driver->domainDefineXMLFlags) {
        virDomainPtr ret;
        ret = conn->driver->domainDefineXMLFlags(conn, xml, flags);
        if (!ret)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return NULL;
}


6219 6220 6221 6222 6223 6224 6225 6226 6227 6228 6229 6230 6231 6232 6233 6234 6235 6236 6237 6238 6239 6240 6241 6242 6243 6244 6245 6246 6247 6248 6249 6250 6251 6252 6253 6254 6255 6256 6257 6258 6259 6260 6261 6262 6263 6264 6265 6266 6267 6268 6269 6270 6271 6272 6273 6274 6275 6276 6277 6278 6279 6280 6281 6282 6283 6284 6285
/**
 * virDomainUndefine:
 * @domain: pointer to a defined domain
 *
 * Undefine a domain. If the domain is running, it's converted to
 * transient domain, without stopping it. If the domain is inactive,
 * the domain configuration is removed.
 *
 * If the domain has a managed save image (see
 * virDomainHasManagedSaveImage()), or if it is inactive and has any
 * snapshot metadata (see virDomainSnapshotNum()), then the undefine will
 * fail. See virDomainUndefineFlags() for more control.
 *
 * Returns 0 in case of success, -1 in case of error
 */
int
virDomainUndefine(virDomainPtr domain)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainUndefine) {
        int ret;
        ret = conn->driver->domainUndefine(domain);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainUndefineFlags:
 * @domain: pointer to a defined domain
 * @flags: bitwise-OR of supported virDomainUndefineFlagsValues
 *
 * Undefine a domain. If the domain is running, it's converted to
 * transient domain, without stopping it. If the domain is inactive,
 * the domain configuration is removed.
 *
 * If the domain has a managed save image (see virDomainHasManagedSaveImage()),
 * then including VIR_DOMAIN_UNDEFINE_MANAGED_SAVE in @flags will also remove
 * that file, and omitting the flag will cause the undefine process to fail.
 *
 * If the domain is inactive and has any snapshot metadata (see
 * virDomainSnapshotNum()), then including
 * VIR_DOMAIN_UNDEFINE_SNAPSHOTS_METADATA in @flags will also remove
 * that metadata.  Omitting the flag will cause the undefine of an
 * inactive domain to fail.  Active snapshots will retain snapshot
 * metadata until the (now-transient) domain halts, regardless of
 * whether this flag is present.  On hypervisors where snapshots do
 * not use libvirt metadata, this flag has no effect.
 *
6286 6287 6288
 * If the domain has any nvram specified, the undefine process will fail
 * unless VIR_DOMAIN_UNDEFINE_KEEP_NVRAM is specified, or if
 * VIR_DOMAIN_UNDEFINE_NVRAM is specified to remove the nvram file.
6289 6290 6291 6292 6293 6294 6295 6296 6297 6298 6299 6300 6301 6302 6303 6304 6305 6306 6307 6308 6309 6310 6311 6312 6313 6314 6315 6316 6317 6318 6319 6320 6321 6322 6323 6324 6325 6326 6327 6328 6329 6330 6331 6332 6333 6334 6335 6336 6337 6338 6339 6340 6341 6342 6343 6344 6345 6346 6347 6348 6349 6350 6351 6352 6353 6354 6355 6356 6357 6358 6359 6360 6361 6362 6363 6364 6365 6366 6367 6368 6369 6370 6371 6372 6373 6374 6375 6376 6377 6378 6379 6380 6381 6382 6383 6384 6385 6386 6387 6388 6389 6390 6391 6392 6393 6394 6395 6396 6397 6398 6399 6400 6401 6402 6403 6404 6405 6406 6407 6408 6409 6410 6411 6412 6413 6414 6415 6416 6417 6418 6419 6420 6421 6422 6423 6424 6425 6426 6427 6428 6429 6430 6431 6432 6433 6434 6435 6436 6437 6438 6439 6440 6441 6442 6443 6444 6445 6446 6447 6448 6449 6450 6451 6452 6453 6454 6455 6456 6457 6458 6459 6460 6461 6462 6463 6464 6465 6466 6467 6468 6469 6470 6471 6472 6473 6474 6475 6476 6477 6478 6479 6480 6481 6482 6483 6484 6485 6486 6487 6488 6489 6490 6491 6492 6493 6494 6495 6496 6497 6498 6499 6500 6501 6502 6503 6504 6505 6506 6507 6508 6509 6510 6511 6512 6513 6514 6515 6516 6517 6518 6519 6520 6521 6522 6523 6524 6525 6526 6527 6528 6529 6530 6531 6532 6533 6534 6535 6536 6537 6538 6539 6540 6541 6542 6543 6544 6545 6546 6547 6548 6549 6550 6551 6552 6553 6554 6555 6556 6557 6558 6559 6560 6561 6562 6563 6564 6565 6566 6567 6568 6569 6570 6571 6572 6573 6574 6575 6576 6577 6578 6579 6580 6581 6582 6583 6584 6585 6586 6587 6588 6589 6590 6591 6592 6593 6594 6595 6596 6597 6598 6599 6600 6601 6602 6603 6604 6605 6606 6607 6608 6609 6610 6611 6612 6613 6614 6615 6616 6617 6618 6619 6620 6621 6622 6623 6624 6625 6626 6627 6628 6629 6630 6631 6632 6633 6634 6635 6636 6637 6638 6639 6640 6641 6642 6643 6644 6645 6646 6647 6648 6649 6650 6651 6652 6653 6654 6655 6656 6657 6658 6659 6660 6661 6662 6663 6664 6665 6666 6667 6668 6669 6670 6671 6672 6673 6674 6675 6676 6677 6678 6679 6680 6681 6682 6683 6684 6685 6686 6687 6688 6689 6690 6691 6692 6693 6694 6695 6696 6697 6698 6699 6700 6701 6702 6703 6704 6705 6706 6707 6708 6709 6710 6711 6712 6713 6714 6715 6716 6717 6718 6719 6720 6721 6722 6723 6724 6725 6726 6727 6728 6729 6730 6731 6732 6733 6734 6735 6736 6737 6738 6739 6740 6741 6742 6743 6744 6745 6746 6747 6748 6749 6750 6751 6752 6753 6754 6755 6756 6757 6758 6759 6760 6761 6762 6763 6764 6765 6766 6767 6768 6769 6770 6771 6772 6773 6774 6775 6776 6777 6778 6779 6780 6781 6782 6783 6784 6785 6786 6787 6788 6789 6790 6791 6792 6793 6794 6795 6796 6797 6798 6799 6800 6801 6802 6803 6804 6805 6806 6807 6808 6809 6810 6811 6812 6813 6814 6815 6816 6817 6818 6819 6820 6821 6822 6823 6824 6825 6826 6827 6828 6829 6830 6831 6832 6833 6834 6835 6836 6837
 *
 * Returns 0 in case of success, -1 in case of error
 */
int
virDomainUndefineFlags(virDomainPtr domain,
                       unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainUndefineFlags) {
        int ret;
        ret = conn->driver->domainUndefineFlags(domain, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virConnectNumOfDefinedDomains:
 * @conn: pointer to the hypervisor connection
 *
 * Provides the number of defined but inactive domains.
 *
 * Returns the number of domain found or -1 in case of error
 */
int
virConnectNumOfDefinedDomains(virConnectPtr conn)
{
    VIR_DEBUG("conn=%p", conn);

    virResetLastError();

    virCheckConnectReturn(conn, -1);

    if (conn->driver->connectNumOfDefinedDomains) {
        int ret;
        ret = conn->driver->connectNumOfDefinedDomains(conn);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virConnectListDefinedDomains:
 * @conn: pointer to the hypervisor connection
 * @names: pointer to an array to store the names
 * @maxnames: size of the array
 *
 * list the defined but inactive domains, stores the pointers to the names
 * in @names
 *
 * For active domains, see virConnectListDomains().  For more control over
 * the results, see virConnectListAllDomains().
 *
 * Returns the number of names provided in the array or -1 in case of error.
 * Note that this command is inherently racy; a domain can be defined between
 * a call to virConnectNumOfDefinedDomains() and this call; you are only
 * guaranteed that all currently defined domains were listed if the return
 * is less than @maxids.  The client must call free() on each returned name.
 */
int
virConnectListDefinedDomains(virConnectPtr conn, char **const names,
                             int maxnames)
{
    VIR_DEBUG("conn=%p, names=%p, maxnames=%d", conn, names, maxnames);

    virResetLastError();

    virCheckConnectReturn(conn, -1);
    virCheckNonNullArgGoto(names, error);
    virCheckNonNegativeArgGoto(maxnames, error);

    if (conn->driver->connectListDefinedDomains) {
        int ret;
        ret = conn->driver->connectListDefinedDomains(conn, names, maxnames);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virConnectListAllDomains:
 * @conn: Pointer to the hypervisor connection.
 * @domains: Pointer to a variable to store the array containing domain objects
 *           or NULL if the list is not required (just returns number of guests).
 * @flags: bitwise-OR of virConnectListAllDomainsFlags
 *
 * Collect a possibly-filtered list of all domains, and return an allocated
 * array of information for each.  This API solves the race inherent in
 * virConnectListDomains() and virConnectListDefinedDomains().
 *
 * Normally, all domains are returned; however, @flags can be used to
 * filter the results for a smaller list of targeted domains.  The valid
 * flags are divided into groups, where each group contains bits that
 * describe mutually exclusive attributes of a domain, and where all bits
 * within a group describe all possible domains.  Some hypervisors might
 * reject explicit bits from a group where the hypervisor cannot make a
 * distinction (for example, not all hypervisors can tell whether domains
 * have snapshots).  For a group supported by a given hypervisor, the
 * behavior when no bits of a group are set is identical to the behavior
 * when all bits in that group are set.  When setting bits from more than
 * one group, it is possible to select an impossible combination (such
 * as an inactive transient domain), in that case a hypervisor may return
 * either 0 or an error.
 *
 * The first group of @flags is VIR_CONNECT_LIST_DOMAINS_ACTIVE (online
 * domains) and VIR_CONNECT_LIST_DOMAINS_INACTIVE (offline domains).
 *
 * The next group of @flags is VIR_CONNECT_LIST_DOMAINS_PERSISTENT (defined
 * domains) and VIR_CONNECT_LIST_DOMAINS_TRANSIENT (running but not defined).
 *
 * The next group of @flags covers various domain states:
 * VIR_CONNECT_LIST_DOMAINS_RUNNING, VIR_CONNECT_LIST_DOMAINS_PAUSED,
 * VIR_CONNECT_LIST_DOMAINS_SHUTOFF, and a catch-all for all other states
 * (such as crashed, this catch-all covers the possibility of adding new
 * states).
 *
 * The remaining groups cover boolean attributes commonly asked about
 * domains; they include VIR_CONNECT_LIST_DOMAINS_MANAGEDSAVE and
 * VIR_CONNECT_LIST_DOMAINS_NO_MANAGEDSAVE, for filtering based on whether
 * a managed save image exists; VIR_CONNECT_LIST_DOMAINS_AUTOSTART and
 * VIR_CONNECT_LIST_DOMAINS_NO_AUTOSTART, for filtering based on autostart;
 * VIR_CONNECT_LIST_DOMAINS_HAS_SNAPSHOT and
 * VIR_CONNECT_LIST_DOMAINS_NO_SNAPSHOT, for filtering based on whether
 * a domain has snapshots.
 *
 * Example of usage:
 *
 *   virDomainPtr *domains;
 *   size_t i;
 *   int ret;
 *   unsigned int flags = VIR_CONNECT_LIST_DOMAINS_RUNNING |
 *                        VIR_CONNECT_LIST_DOMAINS_PERSISTENT;
 *   ret = virConnectListAllDomains(conn, &domains, flags);
 *   if (ret < 0)
 *       error();
 *   for (i = 0; i < ret; i++) {
 *        do_something_with_domain(domains[i]);
 *        //here or in a separate loop if needed
 *        virDomainFree(domains[i]);
 *   }
 *   free(domains);
 *
 * Returns the number of domains found or -1 and sets domains to NULL in case of
 * error.  On success, the array stored into @domains is guaranteed to have an
 * extra allocated element set to NULL but not included in the return count, to
 * make iteration easier. The caller is responsible for calling virDomainFree()
 * on each array element, then calling free() on @domains.
 */
int
virConnectListAllDomains(virConnectPtr conn,
                         virDomainPtr **domains,
                         unsigned int flags)
{
    VIR_DEBUG("conn=%p, domains=%p, flags=%x", conn, domains, flags);

    virResetLastError();

    if (domains)
        *domains = NULL;

    virCheckConnectReturn(conn, -1);

    if (conn->driver->connectListAllDomains) {
        int ret;
        ret = conn->driver->connectListAllDomains(conn, domains, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virDomainCreate:
 * @domain: pointer to a defined domain
 *
 * Launch a defined domain. If the call succeeds the domain moves from the
 * defined to the running domains pools.  The domain will be paused only
 * if restoring from managed state created from a paused domain.  For more
 * control, see virDomainCreateWithFlags().
 *
 * Returns 0 in case of success, -1 in case of error
 */
int
virDomainCreate(virDomainPtr domain)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainCreate) {
        int ret;
        ret = conn->driver->domainCreate(domain);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainCreateWithFlags:
 * @domain: pointer to a defined domain
 * @flags: bitwise-OR of supported virDomainCreateFlags
 *
 * Launch a defined domain. If the call succeeds the domain moves from the
 * defined to the running domains pools.
 *
 * If the VIR_DOMAIN_START_PAUSED flag is set, or if the guest domain
 * has a managed save image that requested paused state (see
 * virDomainManagedSave()) the guest domain will be started, but its
 * CPUs will remain paused. The CPUs can later be manually started
 * using virDomainResume().  In all other cases, the guest domain will
 * be running.
 *
 * If the VIR_DOMAIN_START_AUTODESTROY flag is set, the guest
 * domain will be automatically destroyed when the virConnectPtr
 * object is finally released. This will also happen if the
 * client application crashes / loses its connection to the
 * libvirtd daemon. Any domains marked for auto destroy will
 * block attempts at migration, save-to-file, or snapshots.
 *
 * If the VIR_DOMAIN_START_BYPASS_CACHE flag is set, and there is a
 * managed save file for this domain (created by virDomainManagedSave()),
 * then libvirt will attempt to bypass the file system cache while restoring
 * the file, or fail if it cannot do so for the given system; this can allow
 * less pressure on file system cache, but also risks slowing loads from NFS.
 *
 * If the VIR_DOMAIN_START_FORCE_BOOT flag is set, then any managed save
 * file for this domain is discarded, and the domain boots from scratch.
 *
 * Returns 0 in case of success, -1 in case of error
 */
int
virDomainCreateWithFlags(virDomainPtr domain, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainCreateWithFlags) {
        int ret;
        ret = conn->driver->domainCreateWithFlags(domain, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainCreateWithFiles:
 * @domain: pointer to a defined domain
 * @nfiles: number of file descriptors passed
 * @files: list of file descriptors passed
 * @flags: bitwise-OR of supported virDomainCreateFlags
 *
 * Launch a defined domain. If the call succeeds the domain moves from the
 * defined to the running domains pools.
 *
 * @files provides an array of file descriptors which will be
 * made available to the 'init' process of the guest. The file
 * handles exposed to the guest will be renumbered to start
 * from 3 (ie immediately following stderr). This is only
 * supported for guests which use container based virtualization
 * technology.
 *
 * If the VIR_DOMAIN_START_PAUSED flag is set, or if the guest domain
 * has a managed save image that requested paused state (see
 * virDomainManagedSave()) the guest domain will be started, but its
 * CPUs will remain paused. The CPUs can later be manually started
 * using virDomainResume().  In all other cases, the guest domain will
 * be running.
 *
 * If the VIR_DOMAIN_START_AUTODESTROY flag is set, the guest
 * domain will be automatically destroyed when the virConnectPtr
 * object is finally released. This will also happen if the
 * client application crashes / loses its connection to the
 * libvirtd daemon. Any domains marked for auto destroy will
 * block attempts at migration, save-to-file, or snapshots.
 *
 * If the VIR_DOMAIN_START_BYPASS_CACHE flag is set, and there is a
 * managed save file for this domain (created by virDomainManagedSave()),
 * then libvirt will attempt to bypass the file system cache while restoring
 * the file, or fail if it cannot do so for the given system; this can allow
 * less pressure on file system cache, but also risks slowing loads from NFS.
 *
 * If the VIR_DOMAIN_START_FORCE_BOOT flag is set, then any managed save
 * file for this domain is discarded, and the domain boots from scratch.
 *
 * Returns 0 in case of success, -1 in case of error
 */
int
virDomainCreateWithFiles(virDomainPtr domain, unsigned int nfiles,
                         int *files, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "nfiles=%u, files=%p, flags=%x",
                     nfiles, files, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainCreateWithFiles) {
        int ret;
        ret = conn->driver->domainCreateWithFiles(domain,
                                                  nfiles, files,
                                                  flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetAutostart:
 * @domain: a domain object
 * @autostart: the value returned
 *
 * Provides a boolean value indicating whether the domain
 * configured to be automatically started when the host
 * machine boots.
 *
 * Returns -1 in case of error, 0 in case of success
 */
int
virDomainGetAutostart(virDomainPtr domain,
                      int *autostart)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "autostart=%p", autostart);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    virCheckNonNullArgGoto(autostart, error);

    conn = domain->conn;

    if (conn->driver->domainGetAutostart) {
        int ret;
        ret = conn->driver->domainGetAutostart(domain, autostart);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainSetAutostart:
 * @domain: a domain object
 * @autostart: whether the domain should be automatically started 0 or 1
 *
 * Configure the domain to be automatically started
 * when the host machine boots.
 *
 * Returns -1 in case of error, 0 in case of success
 */
int
virDomainSetAutostart(virDomainPtr domain,
                      int autostart)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "autostart=%d", autostart);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainSetAutostart) {
        int ret;
        ret = conn->driver->domainSetAutostart(domain, autostart);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainInjectNMI:
 * @domain: pointer to domain object, or NULL for Domain0
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Send NMI to the guest
 *
 * Returns 0 in case of success, -1 in case of failure.
 */
int
virDomainInjectNMI(virDomainPtr domain, unsigned int flags)
{
    virConnectPtr conn;
    VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainInjectNMI) {
        int ret;
        ret = conn->driver->domainInjectNMI(domain, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainSendKey:
 * @domain:    pointer to domain object, or NULL for Domain0
 * @codeset:   the code set of keycodes, from virKeycodeSet
 * @holdtime:  the duration (in milliseconds) that the keys will be held
 * @keycodes:  array of keycodes
 * @nkeycodes: number of keycodes, up to VIR_DOMAIN_SEND_KEY_MAX_KEYS
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Send key(s) to the guest.
 *
 * Returns 0 in case of success, -1 in case of failure.
 */
int
virDomainSendKey(virDomainPtr domain,
                 unsigned int codeset,
                 unsigned int holdtime,
                 unsigned int *keycodes,
                 int nkeycodes,
                 unsigned int flags)
{
    virConnectPtr conn;
    VIR_DOMAIN_DEBUG(domain, "codeset=%u, holdtime=%u, nkeycodes=%u, flags=%x",
                     codeset, holdtime, nkeycodes, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(keycodes, error);
    virCheckPositiveArgGoto(nkeycodes, error);

    if (nkeycodes > VIR_DOMAIN_SEND_KEY_MAX_KEYS) {
        virReportInvalidArg(nkeycodes,
6838 6839
                            _("nkeycodes must be <= %d"),
                            VIR_DOMAIN_SEND_KEY_MAX_KEYS);
6840 6841 6842 6843 6844 6845 6846 6847 6848 6849 6850 6851 6852 6853 6854 6855 6856 6857 6858 6859 6860 6861 6862 6863 6864
        goto error;
    }

    if (conn->driver->domainSendKey) {
        int ret;
        ret = conn->driver->domainSendKey(domain, codeset, holdtime,
                                          keycodes, nkeycodes, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainSendProcessSignal:
 * @domain: pointer to domain object
 * @pid_value: a positive integer process ID, or negative integer process group ID
 * @signum: a signal from the virDomainProcessSignal enum
6865
 * @flags: currently unused, pass 0
6866 6867 6868 6869 6870 6871 6872 6873 6874 6875 6876 6877 6878 6879 6880 6881 6882 6883 6884 6885 6886 6887 6888 6889 6890 6891 6892 6893 6894 6895 6896 6897 6898 6899 6900 6901 6902 6903 6904 6905 6906 6907 6908 6909 6910 6911 6912 6913 6914 6915 6916 6917 6918 6919 6920 6921 6922 6923 6924 6925 6926 6927 6928 6929 6930 6931 6932 6933 6934 6935 6936 6937 6938 6939 6940 6941 6942 6943 6944 6945 6946 6947 6948 6949 6950 6951 6952 6953 6954 6955 6956 6957 6958 6959 6960 6961 6962 6963 6964 6965 6966 6967 6968 6969 6970 6971 6972 6973 6974 6975 6976 6977 6978 6979 6980 6981 6982 6983 6984 6985 6986 6987 6988 6989 6990 6991 6992 6993 6994 6995 6996 6997 6998 6999 7000 7001 7002 7003 7004 7005 7006 7007 7008
 *
 * Send a signal to the designated process in the guest
 *
 * The signal numbers must be taken from the virDomainProcessSignal
 * enum. These will be translated to the corresponding signal
 * number for the guest OS, by the guest agent delivering the
 * signal. If there is no mapping from virDomainProcessSignal to
 * the native OS signals, this API will report an error.
 *
 * If @pid_value is an integer greater than zero, it is
 * treated as a process ID. If @pid_value is an integer
 * less than zero, it is treated as a process group ID.
 * All the @pid_value numbers are from the container/guest
 * namespace. The value zero is not valid.
 *
 * Not all hypervisors will support sending signals to
 * arbitrary processes or process groups. If this API is
 * implemented the minimum requirement is to be able to
 * use @pid_value == 1 (i.e. kill init). No other value is
 * required to be supported.
 *
 * If the @signum is VIR_DOMAIN_PROCESS_SIGNAL_NOP then this
 * API will simply report whether the process is running in
 * the container/guest.
 *
 * Returns 0 in case of success, -1 in case of failure.
 */
int
virDomainSendProcessSignal(virDomainPtr domain,
                           long long pid_value,
                           unsigned int signum,
                           unsigned int flags)
{
    virConnectPtr conn;
    VIR_DOMAIN_DEBUG(domain, "pid=%lld, signum=%u flags=%x",
                     pid_value, signum, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckNonZeroArgGoto(pid_value, error);
    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainSendProcessSignal) {
        int ret;
        ret = conn->driver->domainSendProcessSignal(domain,
                                                    pid_value,
                                                    signum,
                                                    flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainSetVcpus:
 * @domain: pointer to domain object, or NULL for Domain0
 * @nvcpus: the new number of virtual CPUs for this domain
 *
 * Dynamically change the number of virtual CPUs used by the domain.
 * Note that this call may fail if the underlying virtualization hypervisor
 * does not support it or if growing the number is arbitrarily limited.
 * This function may require privileged access to the hypervisor.
 *
 * Note that if this call is executed before the guest has finished booting,
 * the guest may fail to process the change.
 *
 * This command only changes the runtime configuration of the domain,
 * so can only be called on an active domain.  It is hypervisor-dependent
 * whether it also affects persistent configuration; for more control,
 * use virDomainSetVcpusFlags().
 *
 * Returns 0 in case of success, -1 in case of failure.
 */
int
virDomainSetVcpus(virDomainPtr domain, unsigned int nvcpus)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "nvcpus=%u", nvcpus);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonZeroArgGoto(nvcpus, error);

    if (conn->driver->domainSetVcpus) {
        int ret;
        ret = conn->driver->domainSetVcpus(domain, nvcpus);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainSetVcpusFlags:
 * @domain: pointer to domain object, or NULL for Domain0
 * @nvcpus: the new number of virtual CPUs for this domain, must be at least 1
 * @flags: bitwise-OR of virDomainVcpuFlags
 *
 * Dynamically change the number of virtual CPUs used by the domain.
 * Note that this call may fail if the underlying virtualization hypervisor
 * does not support it or if growing the number is arbitrarily limited.
 * This function may require privileged access to the hypervisor.
 *
 * @flags may include VIR_DOMAIN_AFFECT_LIVE to affect a running
 * domain (which may fail if domain is not active), or
 * VIR_DOMAIN_AFFECT_CONFIG to affect the next boot via the XML
 * description of the domain.  Both flags may be set.
 * If neither flag is specified (that is, @flags is VIR_DOMAIN_AFFECT_CURRENT),
 * then an inactive domain modifies persistent setup, while an active domain
 * is hypervisor-dependent on whether just live or both live and persistent
 * state is changed.
 *
 * Note that if this call is executed before the guest has finished booting,
 * the guest may fail to process the change.
 *
 * If @flags includes VIR_DOMAIN_VCPU_MAXIMUM, then
 * VIR_DOMAIN_AFFECT_LIVE must be clear, and only the maximum virtual
 * CPU limit is altered; generally, this value must be less than or
 * equal to virConnectGetMaxVcpus().  Otherwise, this call affects the
 * current virtual CPU limit, which must be less than or equal to the
7009 7010
 * maximum limit. Note that hypervisors may not allow changing the maximum
 * vcpu count if processor topology is specified.
7011 7012 7013 7014 7015 7016 7017 7018 7019 7020 7021 7022 7023 7024 7025 7026 7027 7028 7029 7030 7031 7032 7033
 *
 * If @flags includes VIR_DOMAIN_VCPU_GUEST, then the state of processors is
 * modified inside the guest instead of the hypervisor. This flag can only
 * be used with live guests and is incompatible with VIR_DOMAIN_VCPU_MAXIMUM.
 * The usage of this flag may require a guest agent configured.
 *
 * Not all hypervisors can support all flag combinations.
 *
 * Returns 0 in case of success, -1 in case of failure.
 */
int
virDomainSetVcpusFlags(virDomainPtr domain, unsigned int nvcpus,
                       unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "nvcpus=%u, flags=%x", nvcpus, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    virCheckReadOnlyGoto(domain->conn->flags, error);

7034 7035 7036 7037
    VIR_REQUIRE_FLAG_GOTO(VIR_DOMAIN_VCPU_MAXIMUM,
                          VIR_DOMAIN_AFFECT_CONFIG,
                          error);

7038
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_VCPU_GUEST,
7039
                             VIR_DOMAIN_AFFECT_CONFIG,
7040
                             error);
7041 7042 7043 7044 7045 7046 7047 7048 7049 7050 7051 7052 7053 7054 7055 7056 7057 7058 7059 7060 7061 7062 7063 7064 7065 7066 7067 7068 7069 7070 7071 7072 7073 7074 7075 7076 7077 7078 7079 7080 7081 7082 7083 7084 7085 7086 7087 7088 7089 7090 7091 7092 7093 7094 7095 7096 7097 7098 7099 7100 7101 7102 7103 7104

    virCheckNonZeroArgGoto(nvcpus, error);

    conn = domain->conn;

    if (conn->driver->domainSetVcpusFlags) {
        int ret;
        ret = conn->driver->domainSetVcpusFlags(domain, nvcpus, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetVcpusFlags:
 * @domain: pointer to domain object, or NULL for Domain0
 * @flags: bitwise-OR of virDomainVcpuFlags
 *
 * Query the number of virtual CPUs used by the domain.  Note that
 * this call may fail if the underlying virtualization hypervisor does
 * not support it.  This function may require privileged access to the
 * hypervisor.
 *
 * If @flags includes VIR_DOMAIN_AFFECT_LIVE, this will query a
 * running domain (which will fail if domain is not active); if
 * it includes VIR_DOMAIN_AFFECT_CONFIG, this will query the XML
 * description of the domain.  It is an error to set both flags.
 * If neither flag is set (that is, VIR_DOMAIN_AFFECT_CURRENT),
 * then the configuration queried depends on whether the domain
 * is currently running.
 *
 * If @flags includes VIR_DOMAIN_VCPU_MAXIMUM, then the maximum
 * virtual CPU limit is queried.  Otherwise, this call queries the
 * current virtual CPU count.
 *
 * If @flags includes VIR_DOMAIN_VCPU_GUEST, then the state of the processors
 * is queried in the guest instead of the hypervisor. This flag is only usable
 * on live domains. Guest agent may be needed for this flag to be available.
 *
 * Returns the number of vCPUs in case of success, -1 in case of failure.
 */
int
virDomainGetVcpusFlags(virDomainPtr domain, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    if (flags & VIR_DOMAIN_VCPU_GUEST)
        virCheckReadOnlyGoto(conn->flags, error);

7105 7106 7107
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_AFFECT_LIVE,
                             VIR_DOMAIN_AFFECT_CONFIG,
                             error);
7108 7109 7110 7111 7112 7113 7114 7115 7116 7117 7118 7119 7120 7121 7122 7123 7124 7125 7126 7127 7128 7129 7130 7131 7132 7133 7134 7135 7136 7137 7138 7139 7140 7141 7142 7143 7144 7145 7146 7147 7148 7149 7150 7151 7152 7153 7154 7155 7156 7157 7158 7159 7160 7161 7162 7163 7164 7165 7166 7167 7168 7169 7170 7171 7172 7173 7174 7175 7176 7177 7178 7179 7180 7181 7182 7183 7184 7185 7186 7187 7188 7189 7190 7191 7192 7193 7194 7195 7196 7197 7198 7199 7200 7201 7202 7203 7204 7205 7206 7207 7208 7209 7210 7211 7212 7213 7214 7215 7216 7217 7218 7219 7220 7221 7222 7223 7224 7225 7226 7227 7228 7229 7230 7231 7232 7233 7234 7235 7236 7237 7238 7239 7240 7241 7242 7243 7244 7245 7246 7247 7248 7249 7250 7251 7252 7253 7254 7255 7256 7257 7258 7259 7260 7261 7262 7263 7264 7265 7266 7267 7268 7269 7270 7271 7272 7273 7274 7275 7276 7277 7278 7279 7280 7281 7282 7283 7284 7285 7286 7287 7288 7289 7290 7291 7292 7293 7294

    if (conn->driver->domainGetVcpusFlags) {
        int ret;
        ret = conn->driver->domainGetVcpusFlags(domain, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainPinVcpu:
 * @domain: pointer to domain object, or NULL for Domain0
 * @vcpu: virtual CPU number
 * @cpumap: pointer to a bit map of real CPUs (in 8-bit bytes) (IN)
 *      Each bit set to 1 means that corresponding CPU is usable.
 *      Bytes are stored in little-endian order: CPU0-7, 8-15...
 *      In each byte, lowest CPU number is least significant bit.
 * @maplen: number of bytes in cpumap, from 1 up to size of CPU map in
 *      underlying virtualization system (Xen...).
 *      If maplen < size, missing bytes are set to zero.
 *      If maplen > size, failure code is returned.
 *
 * Dynamically change the real CPUs which can be allocated to a virtual CPU.
 * This function may require privileged access to the hypervisor.
 *
 * This command only changes the runtime configuration of the domain,
 * so can only be called on an active domain.
 *
 * Returns 0 in case of success, -1 in case of failure.
 */
int
virDomainPinVcpu(virDomainPtr domain, unsigned int vcpu,
                 unsigned char *cpumap, int maplen)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "vcpu=%u, cpumap=%p, maplen=%d",
                     vcpu, cpumap, maplen);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(cpumap, error);
    virCheckPositiveArgGoto(maplen, error);

    if (conn->driver->domainPinVcpu) {
        int ret;
        ret = conn->driver->domainPinVcpu(domain, vcpu, cpumap, maplen);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainPinVcpuFlags:
 * @domain: pointer to domain object, or NULL for Domain0
 * @vcpu: virtual CPU number
 * @cpumap: pointer to a bit map of real CPUs (in 8-bit bytes) (IN)
 *      Each bit set to 1 means that corresponding CPU is usable.
 *      Bytes are stored in little-endian order: CPU0-7, 8-15...
 *      In each byte, lowest CPU number is least significant bit.
 * @maplen: number of bytes in cpumap, from 1 up to size of CPU map in
 *      underlying virtualization system (Xen...).
 *      If maplen < size, missing bytes are set to zero.
 *      If maplen > size, failure code is returned.
 * @flags: bitwise-OR of virDomainModificationImpact
 *
 * Dynamically change the real CPUs which can be allocated to a virtual CPU.
 * This function may require privileged access to the hypervisor.
 *
 * @flags may include VIR_DOMAIN_AFFECT_LIVE or VIR_DOMAIN_AFFECT_CONFIG.
 * Both flags may be set.
 * If VIR_DOMAIN_AFFECT_LIVE is set, the change affects a running domain
 * and may fail if domain is not alive.
 * If VIR_DOMAIN_AFFECT_CONFIG is set, the change affects persistent state,
 * and will fail for transient domains. If neither flag is specified (that is,
 * @flags is VIR_DOMAIN_AFFECT_CURRENT), then an inactive domain modifies
 * persistent setup, while an active domain is hypervisor-dependent on whether
 * just live or both live and persistent state is changed.
 * Not all hypervisors can support all flag combinations.
 *
 * See also virDomainGetVcpuPinInfo for querying this information.
 *
 * Returns 0 in case of success, -1 in case of failure.
 *
 */
int
virDomainPinVcpuFlags(virDomainPtr domain, unsigned int vcpu,
                      unsigned char *cpumap, int maplen, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "vcpu=%u, cpumap=%p, maplen=%d, flags=%x",
                     vcpu, cpumap, maplen, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(cpumap, error);
    virCheckPositiveArgGoto(maplen, error);

    if (conn->driver->domainPinVcpuFlags) {
        int ret;
        ret = conn->driver->domainPinVcpuFlags(domain, vcpu, cpumap, maplen, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetVcpuPinInfo:
 * @domain: pointer to domain object, or NULL for Domain0
 * @ncpumaps: the number of cpumap (listed first to match virDomainGetVcpus)
 * @cpumaps: pointer to a bit map of real CPUs for all vcpus of this
 *     domain (in 8-bit bytes) (OUT)
 *     It's assumed there is <ncpumaps> cpumap in cpumaps array.
 *     The memory allocated to cpumaps must be (ncpumaps * maplen) bytes
 *     (ie: calloc(ncpumaps, maplen)).
 *     One cpumap inside cpumaps has the format described in
 *     virDomainPinVcpu() API.
 *     Must not be NULL.
 * @maplen: the number of bytes in one cpumap, from 1 up to size of CPU map.
 *     Must be positive.
 * @flags: bitwise-OR of virDomainModificationImpact
 *     Must not be VIR_DOMAIN_AFFECT_LIVE and
 *     VIR_DOMAIN_AFFECT_CONFIG concurrently.
 *
 * Query the CPU affinity setting of all virtual CPUs of domain, store it
 * in cpumaps.
 *
 * Returns the number of virtual CPUs in case of success,
 * -1 in case of failure.
 */
int
virDomainGetVcpuPinInfo(virDomainPtr domain, int ncpumaps,
                        unsigned char *cpumaps, int maplen, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "ncpumaps=%d, cpumaps=%p, maplen=%d, flags=%x",
                     ncpumaps, cpumaps, maplen, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckNonNullArgGoto(cpumaps, error);
    virCheckPositiveArgGoto(ncpumaps, error);
    virCheckPositiveArgGoto(maplen, error);

    if (INT_MULTIPLY_OVERFLOW(ncpumaps, maplen)) {
        virReportError(VIR_ERR_OVERFLOW, _("input too large: %d * %d"),
                       ncpumaps, maplen);
        goto error;
    }

7295 7296 7297
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_AFFECT_LIVE,
                             VIR_DOMAIN_AFFECT_CONFIG,
                             error);
7298 7299 7300 7301 7302 7303 7304 7305 7306 7307 7308 7309 7310 7311 7312 7313 7314 7315 7316 7317 7318 7319 7320 7321 7322 7323 7324 7325 7326 7327 7328 7329 7330 7331 7332 7333 7334 7335 7336 7337 7338 7339 7340 7341 7342 7343 7344 7345 7346 7347 7348 7349 7350 7351 7352 7353 7354 7355 7356 7357 7358 7359 7360 7361 7362 7363 7364 7365 7366 7367 7368 7369 7370 7371 7372 7373 7374 7375 7376 7377 7378 7379 7380 7381 7382 7383 7384 7385 7386 7387 7388 7389 7390 7391 7392 7393 7394 7395 7396 7397 7398 7399 7400 7401 7402 7403 7404 7405 7406 7407 7408 7409 7410 7411 7412 7413 7414 7415 7416 7417 7418

    if (conn->driver->domainGetVcpuPinInfo) {
        int ret;
        ret = conn->driver->domainGetVcpuPinInfo(domain, ncpumaps,
                                                 cpumaps, maplen, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainPinEmulator:
 * @domain: pointer to domain object, or NULL for Domain0
 * @cpumap: pointer to a bit map of real CPUs (in 8-bit bytes) (IN)
 *      Each bit set to 1 means that corresponding CPU is usable.
 *      Bytes are stored in little-endian order: CPU0-7, 8-15...
 *      In each byte, lowest CPU number is least significant bit.
 * @maplen: number of bytes in cpumap, from 1 up to size of CPU map in
 *      underlying virtualization system (Xen...).
 *      If maplen < size, missing bytes are set to zero.
 *      If maplen > size, failure code is returned.
 * @flags: bitwise-OR of virDomainModificationImpact
 *
 * Dynamically change the real CPUs which can be allocated to all emulator
 * threads. This function may require privileged access to the hypervisor.
 *
 * @flags may include VIR_DOMAIN_AFFECT_LIVE or VIR_DOMAIN_AFFECT_CONFIG.
 * Both flags may be set.
 * If VIR_DOMAIN_AFFECT_LIVE is set, the change affects a running domain
 * and may fail if domain is not alive.
 * If VIR_DOMAIN_AFFECT_CONFIG is set, the change affects persistent state,
 * and will fail for transient domains. If neither flag is specified (that is,
 * @flags is VIR_DOMAIN_AFFECT_CURRENT), then an inactive domain modifies
 * persistent setup, while an active domain is hypervisor-dependent on whether
 * just live or both live and persistent state is changed.
 * Not all hypervisors can support all flag combinations.
 *
 * See also virDomainGetEmulatorPinInfo for querying this information.
 *
 * Returns 0 in case of success, -1 in case of failure.
 *
 */
int
virDomainPinEmulator(virDomainPtr domain, unsigned char *cpumap,
                     int maplen, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "cpumap=%p, maplen=%d, flags=%x",
                     cpumap, maplen, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    virCheckNonNullArgGoto(cpumap, error);
    virCheckPositiveArgGoto(maplen, error);

    if (conn->driver->domainPinEmulator) {
        int ret;
        ret = conn->driver->domainPinEmulator(domain, cpumap, maplen, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetEmulatorPinInfo:
 * @domain: pointer to domain object, or NULL for Domain0
 * @cpumap: pointer to a bit map of real CPUs for all emulator threads of
 *     this domain (in 8-bit bytes) (OUT)
 *     There is only one cpumap for all emulator threads.
 *     Must not be NULL.
 * @maplen: the number of bytes in one cpumap, from 1 up to size of CPU map.
 *     Must be positive.
 * @flags: bitwise-OR of virDomainModificationImpact
 *     Must not be VIR_DOMAIN_AFFECT_LIVE and
 *     VIR_DOMAIN_AFFECT_CONFIG concurrently.
 *
 * Query the CPU affinity setting of all emulator threads of domain, store
 * it in cpumap.
 *
 * Returns 1 in case of success,
 * 0 in case of no emulator threads are pined to pcpus,
 * -1 in case of failure.
 */
int
virDomainGetEmulatorPinInfo(virDomainPtr domain, unsigned char *cpumap,
                            int maplen, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "cpumap=%p, maplen=%d, flags=%x",
                     cpumap, maplen, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);

    virCheckNonNullArgGoto(cpumap, error);
    virCheckPositiveArgGoto(maplen, error);

7419 7420 7421 7422
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_AFFECT_LIVE,
                             VIR_DOMAIN_AFFECT_CONFIG,
                             error);

7423 7424 7425 7426 7427 7428 7429 7430 7431 7432 7433 7434 7435 7436 7437 7438 7439 7440 7441 7442 7443 7444 7445 7446 7447 7448 7449 7450 7451 7452 7453 7454 7455 7456 7457 7458 7459 7460 7461 7462 7463 7464 7465 7466 7467 7468 7469 7470 7471 7472 7473 7474 7475 7476 7477 7478 7479 7480 7481 7482 7483 7484 7485 7486 7487 7488 7489 7490 7491 7492 7493 7494 7495 7496 7497 7498 7499 7500 7501 7502 7503 7504 7505 7506 7507 7508 7509 7510 7511 7512 7513 7514 7515 7516 7517 7518 7519 7520 7521 7522 7523 7524 7525 7526 7527 7528 7529 7530 7531 7532 7533 7534 7535 7536 7537 7538 7539 7540 7541 7542 7543 7544 7545 7546 7547 7548 7549 7550 7551 7552 7553 7554
    conn = domain->conn;

    if (conn->driver->domainGetEmulatorPinInfo) {
        int ret;
        ret = conn->driver->domainGetEmulatorPinInfo(domain, cpumap,
                                                     maplen, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetVcpus:
 * @domain: pointer to domain object, or NULL for Domain0
 * @info: pointer to an array of virVcpuInfo structures (OUT)
 * @maxinfo: number of structures in info array
 * @cpumaps: pointer to a bit map of real CPUs for all vcpus of this
 *      domain (in 8-bit bytes) (OUT)
 *      If cpumaps is NULL, then no cpumap information is returned by the API.
 *      It's assumed there is <maxinfo> cpumap in cpumaps array.
 *      The memory allocated to cpumaps must be (maxinfo * maplen) bytes
 *      (ie: calloc(maxinfo, maplen)).
 *      One cpumap inside cpumaps has the format described in
 *      virDomainPinVcpu() API.
 * @maplen: number of bytes in one cpumap, from 1 up to size of CPU map in
 *      underlying virtualization system (Xen...).
 *      Must be zero when cpumaps is NULL and positive when it is non-NULL.
 *
 * Extract information about virtual CPUs of domain, store it in info array
 * and also in cpumaps if this pointer isn't NULL.  This call may fail
 * on an inactive domain.
 *
 * See also virDomainGetVcpuPinInfo for querying just cpumaps, including on
 * an inactive domain.
 *
 * Returns the number of info filled in case of success, -1 in case of failure.
 */
int
virDomainGetVcpus(virDomainPtr domain, virVcpuInfoPtr info, int maxinfo,
                  unsigned char *cpumaps, int maplen)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "info=%p, maxinfo=%d, cpumaps=%p, maplen=%d",
                     info, maxinfo, cpumaps, maplen);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    virCheckNonNullArgGoto(info, error);
    virCheckPositiveArgGoto(maxinfo, error);

    /* Ensure that domainGetVcpus (aka remoteDomainGetVcpus) does not
       try to memcpy anything into a NULL pointer.  */
    if (cpumaps)
        virCheckPositiveArgGoto(maplen, error);
    else
        virCheckZeroArgGoto(maplen, error);

    if (cpumaps && INT_MULTIPLY_OVERFLOW(maxinfo, maplen)) {
        virReportError(VIR_ERR_OVERFLOW, _("input too large: %d * %d"),
                       maxinfo, maplen);
        goto error;
    }

    conn = domain->conn;

    if (conn->driver->domainGetVcpus) {
        int ret;
        ret = conn->driver->domainGetVcpus(domain, info, maxinfo,
                                           cpumaps, maplen);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetMaxVcpus:
 * @domain: pointer to domain object
 *
 * Provides the maximum number of virtual CPUs supported for
 * the guest VM. If the guest is inactive, this is basically
 * the same as virConnectGetMaxVcpus(). If the guest is running
 * this will reflect the maximum number of virtual CPUs the
 * guest was booted with.  For more details, see virDomainGetVcpusFlags().
 *
 * Returns the maximum of virtual CPU or -1 in case of error.
 */
int
virDomainGetMaxVcpus(virDomainPtr domain)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    if (conn->driver->domainGetMaxVcpus) {
        int ret;
        ret = conn->driver->domainGetMaxVcpus(domain);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


7555
/**
7556
 * virDomainGetIOThreadInfo:
7557 7558 7559 7560 7561 7562 7563 7564 7565 7566 7567
 * @dom: a domain object
 * @info: pointer to an array of virDomainIOThreadInfo structures (OUT)
 * @flags: bitwise-OR of virDomainModificationImpact
 *     Must not be VIR_DOMAIN_AFFECT_LIVE and
 *     VIR_DOMAIN_AFFECT_CONFIG concurrently.
 *
 * Fetch IOThreads of an active domain including the cpumap information to
 * determine on which CPU the IOThread has affinity to run.
 *
 * Returns the number of IOThreads or -1 in case of error.
 * On success, the array of information is stored into @info. The caller is
7568
 * responsible for calling virDomainIOThreadInfoFree() on each array element,
7569 7570 7571
 * then calling free() on @info. On error, @info is set to NULL.
 */
int
7572 7573 7574
virDomainGetIOThreadInfo(virDomainPtr dom,
                         virDomainIOThreadInfoPtr **info,
                         unsigned int flags)
7575 7576 7577 7578 7579 7580 7581 7582 7583
{
    VIR_DOMAIN_DEBUG(dom, "info=%p flags=%x", info, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    virCheckNonNullArgGoto(info, error);
    *info = NULL;

7584 7585 7586
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_AFFECT_LIVE,
                             VIR_DOMAIN_AFFECT_CONFIG,
                             error);
7587

7588
    if (dom->conn->driver->domainGetIOThreadInfo) {
7589
        int ret;
7590
        ret = dom->conn->driver->domainGetIOThreadInfo(dom, info, flags);
7591 7592 7593 7594 7595 7596 7597 7598 7599 7600 7601 7602 7603 7604
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
7605
 * virDomainIOThreadInfoFree:
7606 7607 7608 7609 7610
 * @info: pointer to a virDomainIOThreadInfo object
 *
 * Frees the memory used by @info.
 */
void
7611
virDomainIOThreadInfoFree(virDomainIOThreadInfoPtr info)
7612 7613 7614 7615 7616 7617 7618 7619 7620
{
    if (!info)
        return;

    VIR_FREE(info->cpumap);
    VIR_FREE(info);
}


7621 7622 7623 7624 7625 7626 7627 7628 7629 7630 7631 7632 7633 7634 7635 7636 7637 7638 7639 7640 7641 7642 7643 7644 7645 7646 7647 7648
/**
 * virDomainPinIOThread:
 * @domain: a domain object
 * @iothread_id: the IOThread ID to set the CPU affinity
 * @cpumap: pointer to a bit map of real CPUs (in 8-bit bytes) (IN)
 *      Each bit set to 1 means that corresponding CPU is usable.
 *      Bytes are stored in little-endian order: CPU0-7, 8-15...
 *      In each byte, lowest CPU number is least significant bit.
 * @maplen: number of bytes in cpumap, from 1 up to size of CPU map in
 *      underlying virtualization system (Xen...).
 *      If maplen < size, missing bytes are set to zero.
 *      If maplen > size, failure code is returned.
 * @flags: bitwise-OR of virDomainModificationImpact
 *
 * Dynamically change the real CPUs which can be allocated to an IOThread.
 * This function may require privileged access to the hypervisor.
 *
 * @flags may include VIR_DOMAIN_AFFECT_LIVE or VIR_DOMAIN_AFFECT_CONFIG.
 * Both flags may be set.
 * If VIR_DOMAIN_AFFECT_LIVE is set, the change affects a running domain
 * and may fail if domain is not alive.
 * If VIR_DOMAIN_AFFECT_CONFIG is set, the change affects persistent state,
 * and will fail for transient domains. If neither flag is specified (that is,
 * @flags is VIR_DOMAIN_AFFECT_CURRENT), then an inactive domain modifies
 * persistent setup, while an active domain is hypervisor-dependent on whether
 * just live or both live and persistent state is changed.
 * Not all hypervisors can support all flag combinations.
 *
7649
 * See also virDomainGetIOThreadInfo for querying this information.
7650 7651 7652 7653 7654 7655 7656 7657 7658 7659 7660 7661 7662 7663 7664 7665 7666 7667 7668 7669 7670 7671 7672 7673 7674 7675 7676 7677 7678 7679
 *
 * Returns 0 in case of success, -1 in case of failure.
 */
int
virDomainPinIOThread(virDomainPtr domain,
                     unsigned int iothread_id,
                     unsigned char *cpumap,
                     int maplen,
                     unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "iothread_id=%u, cpumap=%p, maplen=%d",
                     iothread_id, cpumap, maplen);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(cpumap, error);
    virCheckPositiveArgGoto(maplen, error);

    if (conn->driver->domainPinIOThread) {
        int ret;
        ret = conn->driver->domainPinIOThread(domain, iothread_id,
                                              cpumap, maplen, flags);
        if (ret < 0)
            goto error;
7680 7681 7682 7683 7684 7685 7686 7687 7688 7689 7690 7691 7692 7693 7694 7695 7696
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainAddIOThread:
 * @domain: a domain object
 * @iothread_id: the specific IOThread ID value to add
 * @flags: bitwise-OR of virDomainModificationImpact
 *
7697 7698 7699
 * Dynamically add an IOThread to the domain. It is left up to the
 * underlying virtual hypervisor to determine the valid range for an
 * @iothread_id and determining whether the @iothread_id already exists.
7700 7701 7702 7703 7704 7705 7706 7707 7708 7709 7710 7711 7712 7713 7714 7715 7716 7717 7718 7719 7720 7721 7722 7723 7724 7725 7726 7727 7728 7729 7730 7731 7732 7733 7734 7735 7736 7737 7738 7739 7740 7741 7742 7743 7744 7745 7746 7747 7748 7749 7750 7751 7752 7753 7754 7755 7756 7757 7758 7759 7760 7761 7762 7763 7764 7765 7766 7767 7768 7769 7770 7771 7772 7773 7774 7775 7776 7777 7778 7779 7780 7781 7782 7783 7784 7785 7786 7787 7788 7789 7790 7791 7792 7793 7794 7795 7796 7797
 *
 * Note that this call can fail if the underlying virtualization hypervisor
 * does not support it or if growing the number is arbitrarily limited.
 * This function requires privileged access to the hypervisor.
 *
 * @flags may include VIR_DOMAIN_AFFECT_LIVE or VIR_DOMAIN_AFFECT_CONFIG.
 * Both flags may be set.
 * If VIR_DOMAIN_AFFECT_LIVE is set, the change affects a running domain
 * and may fail if domain is not alive.
 * If VIR_DOMAIN_AFFECT_CONFIG is set, the change affects persistent state,
 * and will fail for transient domains. If neither flag is specified (that is,
 * @flags is VIR_DOMAIN_AFFECT_CURRENT), then an inactive domain modifies
 * persistent setup, while an active domain is hypervisor-dependent on whether
 * just live or both live and persistent state is changed.
 *
 * Returns 0 in case of success, -1 in case of failure.
 */
int
virDomainAddIOThread(virDomainPtr domain,
                     unsigned int iothread_id,
                     unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "iothread_id=%u, flags=%x",
                     iothread_id, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    virCheckReadOnlyGoto(domain->conn->flags, error);

    conn = domain->conn;

    if (conn->driver->domainAddIOThread) {
        int ret;
        ret = conn->driver->domainAddIOThread(domain, iothread_id, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainDelIOThread:
 * @domain: a domain object
 * @iothread_id: the specific IOThread ID value to delete
 * @flags: bitwise-OR of virDomainModificationImpact
 *
 * Dynamically delete an IOThread from the domain. The @iothread_id to be
 * deleted must not have a resource associated with it and can be any of
 * the currently valid IOThread ID's.
 *
 * Note that this call can fail if the underlying virtualization hypervisor
 * does not support it or if reducing the number is arbitrarily limited.
 * This function requires privileged access to the hypervisor.
 *
 * @flags may include VIR_DOMAIN_AFFECT_LIVE or VIR_DOMAIN_AFFECT_CONFIG.
 * Both flags may be set.
 * If VIR_DOMAIN_AFFECT_LIVE is set, the change affects a running domain
 * and may fail if domain is not alive.
 * If VIR_DOMAIN_AFFECT_CONFIG is set, the change affects persistent state,
 * and will fail for transient domains. If neither flag is specified (that is,
 * @flags is VIR_DOMAIN_AFFECT_CURRENT), then an inactive domain modifies
 * persistent setup, while an active domain is hypervisor-dependent on whether
 * just live or both live and persistent state is changed.
 *
 * Returns 0 in case of success, -1 in case of failure.
 */
int
virDomainDelIOThread(virDomainPtr domain,
                     unsigned int iothread_id,
                     unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "iothread_id=%u, flags=%x", iothread_id, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    virCheckReadOnlyGoto(domain->conn->flags, error);
    virCheckNonZeroArgGoto(iothread_id, error);

    conn = domain->conn;

    if (conn->driver->domainDelIOThread) {
        int ret;
        ret = conn->driver->domainDelIOThread(domain, iothread_id, flags);
        if (ret < 0)
            goto error;
7798 7799 7800 7801 7802 7803 7804 7805 7806 7807 7808
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


7809 7810 7811 7812 7813 7814 7815 7816 7817 7818 7819 7820 7821 7822 7823 7824 7825 7826 7827 7828 7829 7830 7831 7832 7833 7834 7835 7836 7837 7838 7839 7840 7841 7842 7843 7844 7845 7846 7847 7848 7849 7850 7851 7852 7853 7854 7855 7856 7857 7858 7859 7860 7861 7862 7863 7864 7865 7866 7867 7868 7869 7870 7871 7872 7873 7874 7875 7876 7877 7878 7879 7880 7881 7882 7883 7884 7885 7886 7887 7888 7889 7890 7891 7892 7893 7894 7895 7896 7897 7898 7899 7900 7901 7902 7903 7904 7905 7906 7907 7908 7909 7910 7911 7912 7913 7914 7915 7916 7917 7918 7919 7920 7921 7922 7923 7924 7925 7926 7927 7928 7929 7930 7931 7932 7933 7934 7935 7936 7937 7938 7939 7940 7941 7942 7943 7944 7945 7946 7947 7948
/**
 * virDomainGetSecurityLabel:
 * @domain: a domain object
 * @seclabel: pointer to a virSecurityLabel structure
 *
 * Extract security label of an active domain. The 'label' field
 * in the @seclabel argument will be initialized to the empty
 * string if the domain is not running under a security model.
 *
 * Returns 0 in case of success, -1 in case of failure
 */
int
virDomainGetSecurityLabel(virDomainPtr domain, virSecurityLabelPtr seclabel)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "seclabel=%p", seclabel);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckNonNullArgGoto(seclabel, error);

    if (conn->driver->domainGetSecurityLabel) {
        int ret;
        ret = conn->driver->domainGetSecurityLabel(domain, seclabel);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetSecurityLabelList:
 * @domain: a domain object
 * @seclabels: will be auto-allocated and filled with domains' security labels.
 * Caller must free memory on return.
 *
 * Extract the security labels of an active domain. The 'label' field
 * in the @seclabels argument will be initialized to the empty
 * string if the domain is not running under a security model.
 *
 * Returns number of elemnets in @seclabels on success, -1 in case of failure.
 */
int
virDomainGetSecurityLabelList(virDomainPtr domain,
                              virSecurityLabelPtr* seclabels)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "seclabels=%p", seclabels);

    virResetLastError();

    virCheckDomainReturn(domain, -1);

    virCheckNonNullArgGoto(seclabels, error);

    conn = domain->conn;

    if (conn->driver->domainGetSecurityLabelList) {
        int ret;
        ret = conn->driver->domainGetSecurityLabelList(domain, seclabels);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainSetMetadata:
 * @domain: a domain object
 * @type: type of metadata, from virDomainMetadataType
 * @metadata: new metadata text
 * @key: XML namespace key, or NULL
 * @uri: XML namespace URI, or NULL
 * @flags: bitwise-OR of virDomainModificationImpact
 *
 * Sets the appropriate domain element given by @type to the
 * value of @metadata.  A @type of VIR_DOMAIN_METADATA_DESCRIPTION
 * is free-form text; VIR_DOMAIN_METADATA_TITLE is free-form, but no
 * newlines are permitted, and should be short (although the length is
 * not enforced). For these two options @key and @uri are irrelevant and
 * must be set to NULL.
 *
 * For type VIR_DOMAIN_METADATA_ELEMENT @metadata  must be well-formed
 * XML belonging to namespace defined by @uri with local name @key.
 *
 * Passing NULL for @metadata says to remove that element from the
 * domain XML (passing the empty string leaves the element present).
 *
 * The resulting metadata will be present in virDomainGetXMLDesc(),
 * as well as quick access through virDomainGetMetadata().
 *
 * @flags controls whether the live domain, persistent configuration,
 * or both will be modified.
 *
 * Returns 0 on success, -1 in case of failure.
 */
int
virDomainSetMetadata(virDomainPtr domain,
                     int type,
                     const char *metadata,
                     const char *key,
                     const char *uri,
                     unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain,
                     "type=%d, metadata='%s', key='%s', uri='%s', flags=%x",
                     type, NULLSTR(metadata), NULLSTR(key), NULLSTR(uri),
                     flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    switch (type) {
    case VIR_DOMAIN_METADATA_TITLE:
        if (metadata && strchr(metadata, '\n')) {
7949 7950 7951
            virReportInvalidArg(metadata, "%s",
                                _("metadata title can't contain "
                                  "newlines"));
7952 7953
            goto error;
        }
M
Marc Hartmayer 已提交
7954
        ATTRIBUTE_FALLTHROUGH;
7955 7956 7957 7958 7959 7960 7961 7962 7963 7964 7965 7966 7967 7968 7969 7970 7971 7972 7973 7974 7975 7976 7977 7978 7979 7980 7981 7982 7983 7984 7985 7986 7987 7988 7989 7990 7991 7992 7993 7994 7995 7996 7997 7998 7999 8000 8001 8002 8003 8004 8005 8006 8007 8008 8009 8010 8011 8012 8013 8014 8015 8016 8017 8018 8019 8020 8021 8022 8023
    case VIR_DOMAIN_METADATA_DESCRIPTION:
        virCheckNullArgGoto(uri, error);
        virCheckNullArgGoto(key, error);
        break;
    case VIR_DOMAIN_METADATA_ELEMENT:
        virCheckNonNullArgGoto(uri, error);
        if (metadata)
            virCheckNonNullArgGoto(key, error);
        break;
    default:
        /* For future expansion */
        break;
    }

    if (conn->driver->domainSetMetadata) {
        int ret;
        ret = conn->driver->domainSetMetadata(domain, type, metadata, key, uri,
                                              flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetMetadata:
 * @domain: a domain object
 * @type: type of metadata, from virDomainMetadataType
 * @uri: XML namespace identifier
 * @flags: bitwise-OR of virDomainModificationImpact
 *
 * Retrieves the appropriate domain element given by @type.
 * If VIR_DOMAIN_METADATA_ELEMENT is requested parameter @uri
 * must be set to the name of the namespace the requested elements
 * belong to, otherwise must be NULL.
 *
 * If an element of the domain XML is not present, the resulting
 * error will be VIR_ERR_NO_DOMAIN_METADATA.  This method forms
 * a shortcut for seeing information from virDomainSetMetadata()
 * without having to go through virDomainGetXMLDesc().
 *
 * @flags controls whether the live domain or persistent
 * configuration will be queried.
 *
 * Returns the metadata string on success (caller must free),
 * or NULL in case of failure.
 */
char *
virDomainGetMetadata(virDomainPtr domain,
                     int type,
                     const char *uri,
                     unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "type=%d, uri='%s', flags=%x",
                     type, NULLSTR(uri), flags);

    virResetLastError();

    virCheckDomainReturn(domain, NULL);

8024 8025 8026
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_AFFECT_LIVE,
                             VIR_DOMAIN_AFFECT_CONFIG,
                             error);
8027 8028 8029 8030 8031 8032 8033 8034 8035 8036 8037 8038 8039 8040 8041 8042 8043 8044 8045 8046 8047 8048 8049 8050 8051 8052 8053 8054 8055 8056 8057 8058 8059 8060 8061 8062 8063 8064 8065 8066 8067 8068 8069 8070 8071 8072 8073 8074 8075 8076 8077 8078 8079 8080 8081 8082 8083 8084 8085 8086 8087 8088 8089 8090 8091 8092 8093 8094 8095 8096 8097 8098 8099 8100 8101 8102 8103 8104 8105 8106 8107 8108 8109 8110 8111 8112 8113 8114 8115 8116 8117 8118 8119 8120 8121 8122 8123 8124 8125 8126 8127 8128 8129 8130 8131 8132 8133 8134 8135 8136 8137 8138 8139 8140 8141 8142 8143 8144 8145 8146 8147 8148 8149 8150 8151 8152 8153 8154 8155 8156 8157 8158 8159 8160 8161 8162 8163 8164 8165 8166 8167 8168 8169 8170 8171

    switch (type) {
    case VIR_DOMAIN_METADATA_TITLE:
    case VIR_DOMAIN_METADATA_DESCRIPTION:
        virCheckNullArgGoto(uri, error);
        break;
    case VIR_DOMAIN_METADATA_ELEMENT:
        virCheckNonNullArgGoto(uri, error);
        break;
    default:
        /* For future expansion */
        break;
    }

    conn = domain->conn;

    if (conn->driver->domainGetMetadata) {
        char *ret;
        if (!(ret = conn->driver->domainGetMetadata(domain, type, uri, flags)))
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return NULL;
}


/**
 * virDomainAttachDevice:
 * @domain: pointer to domain object
 * @xml: pointer to XML description of one device
 *
 * Create a virtual device attachment to backend.  This function,
 * having hotplug semantics, is only allowed on an active domain.
 *
 * For compatibility, this method can also be used to change the media
 * in an existing CDROM/Floppy device, however, applications are
 * recommended to use the virDomainUpdateDeviceFlag method instead.
 *
 * Be aware that hotplug changes might not persist across a domain going
 * into S4 state (also known as hibernation) unless you also modify the
 * persistent domain definition.
 *
 * Returns 0 in case of success, -1 in case of failure.
 */
int
virDomainAttachDevice(virDomainPtr domain, const char *xml)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "xml=%s", xml);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckNonNullArgGoto(xml, error);
    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainAttachDevice) {
       int ret;
       ret = conn->driver->domainAttachDevice(domain, xml);
       if (ret < 0)
          goto error;
       return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainAttachDeviceFlags:
 * @domain: pointer to domain object
 * @xml: pointer to XML description of one device
 * @flags: bitwise-OR of virDomainDeviceModifyFlags
 *
 * Attach a virtual device to a domain, using the flags parameter
 * to control how the device is attached.  VIR_DOMAIN_AFFECT_CURRENT
 * specifies that the device allocation is made based on current domain
 * state.  VIR_DOMAIN_AFFECT_LIVE specifies that the device shall be
 * allocated to the active domain instance only and is not added to the
 * persisted domain configuration.  VIR_DOMAIN_AFFECT_CONFIG
 * specifies that the device shall be allocated to the persisted domain
 * configuration only.  Note that the target hypervisor must return an
 * error if unable to satisfy flags.  E.g. the hypervisor driver will
 * return failure if LIVE is specified but it only supports modifying the
 * persisted device allocation.
 *
 * For compatibility, this method can also be used to change the media
 * in an existing CDROM/Floppy device, however, applications are
 * recommended to use the virDomainUpdateDeviceFlag method instead.
 *
 * Be aware that hotplug changes might not persist across a domain going
 * into S4 state (also known as hibernation) unless you also modify the
 * persistent domain definition.
 *
 * Returns 0 in case of success, -1 in case of failure.
 */
int
virDomainAttachDeviceFlags(virDomainPtr domain,
                           const char *xml, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "xml=%s, flags=%x", xml, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckNonNullArgGoto(xml, error);
    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainAttachDeviceFlags) {
        int ret;
        ret = conn->driver->domainAttachDeviceFlags(domain, xml, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainDetachDevice:
 * @domain: pointer to domain object
 * @xml: pointer to XML description of one device
 *
8172 8173
 * This is an equivalent of virDomainDetachDeviceFlags() when called with
 * @flags parameter set to VIR_DOMAIN_AFFECT_LIVE.
8174
 *
8175
 * See virDomainDetachDeviceFlags() for more details.
8176
 *
8177 8178 8179 8180 8181 8182 8183 8184 8185 8186 8187 8188 8189 8190 8191 8192 8193 8194 8195 8196 8197 8198 8199 8200 8201 8202 8203 8204 8205 8206 8207 8208 8209 8210 8211 8212 8213 8214 8215 8216 8217 8218 8219 8220 8221 8222 8223 8224 8225 8226 8227 8228 8229 8230 8231 8232 8233 8234 8235 8236 8237 8238 8239
 * Returns 0 in case of success, -1 in case of failure.
 */
int
virDomainDetachDevice(virDomainPtr domain, const char *xml)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "xml=%s", xml);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckNonNullArgGoto(xml, error);
    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainDetachDevice) {
        int ret;
        ret = conn->driver->domainDetachDevice(domain, xml);
         if (ret < 0)
             goto error;
         return ret;
     }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainDetachDeviceFlags:
 * @domain: pointer to domain object
 * @xml: pointer to XML description of one device
 * @flags: bitwise-OR of virDomainDeviceModifyFlags
 *
 * Detach a virtual device from a domain, using the flags parameter
 * to control how the device is detached.  VIR_DOMAIN_AFFECT_CURRENT
 * specifies that the device allocation is removed based on current domain
 * state.  VIR_DOMAIN_AFFECT_LIVE specifies that the device shall be
 * deallocated from the active domain instance only and is not from the
 * persisted domain configuration.  VIR_DOMAIN_AFFECT_CONFIG
 * specifies that the device shall be deallocated from the persisted domain
 * configuration only.  Note that the target hypervisor must return an
 * error if unable to satisfy flags.  E.g. the hypervisor driver will
 * return failure if LIVE is specified but it only supports removing the
 * persisted device allocation.
 *
 * Some hypervisors may prevent this operation if there is a current
 * block copy operation on the device being detached; in that case,
 * use virDomainBlockJobAbort() to stop the block copy first.
 *
 * Beware that depending on the hypervisor and device type, detaching a device
 * from a running domain may be asynchronous. That is, calling
 * virDomainDetachDeviceFlags may just request device removal while the device
 * is actually removed later (in cooperation with a guest OS). Previously,
 * this fact was ignored and the device could have been removed from domain
 * configuration before it was actually removed by the hypervisor causing
 * various failures on subsequent operations. To check whether the device was
 * successfully removed, either recheck domain configuration using
8240
 * virDomainGetXMLDesc() or add a handler for the VIR_DOMAIN_EVENT_ID_DEVICE_REMOVED
8241 8242 8243 8244 8245 8246 8247 8248 8249 8250 8251
 * event. In case the device is already gone when virDomainDetachDeviceFlags
 * returns, the event is delivered before this API call ends. To help existing
 * clients work better in most cases, this API will try to transform an
 * asynchronous device removal that finishes shortly after the request into
 * a synchronous removal. In other words, this API may wait a bit for the
 * removal to complete in case it was not synchronous.
 *
 * Be aware that hotplug changes might not persist across a domain going
 * into S4 state (also known as hibernation) unless you also modify the
 * persistent domain definition.
 *
8252 8253 8254 8255 8256 8257 8258
 * The supplied XML description of the device should be as specific
 * as its definition in the domain XML. The set of attributes used
 * to match the device are internal to the drivers. Using a partial definition,
 * or attempting to detach a device that is not present in the domain XML,
 * but shares some specific attributes with one that is present,
 * may lead to unexpected results.
 *
8259 8260 8261 8262 8263 8264 8265 8266 8267 8268 8269 8270 8271 8272 8273 8274 8275 8276 8277 8278 8279 8280 8281 8282 8283 8284 8285 8286 8287 8288 8289 8290 8291 8292 8293 8294 8295 8296 8297 8298 8299 8300 8301 8302 8303 8304 8305 8306 8307 8308 8309 8310 8311 8312 8313 8314 8315 8316 8317 8318 8319 8320 8321 8322 8323 8324 8325 8326 8327 8328 8329 8330 8331 8332 8333 8334 8335 8336 8337 8338 8339 8340 8341 8342 8343 8344 8345 8346 8347 8348 8349 8350 8351 8352 8353 8354 8355 8356 8357 8358 8359 8360 8361 8362 8363 8364 8365 8366 8367 8368 8369 8370 8371 8372 8373 8374 8375 8376 8377 8378 8379 8380 8381 8382 8383 8384 8385 8386 8387 8388 8389 8390 8391 8392 8393 8394 8395 8396 8397 8398 8399 8400 8401 8402 8403 8404 8405 8406 8407 8408 8409 8410 8411 8412 8413 8414 8415 8416 8417 8418 8419 8420 8421 8422 8423 8424 8425 8426 8427 8428 8429 8430 8431 8432 8433 8434 8435 8436 8437 8438 8439 8440 8441 8442 8443 8444 8445 8446 8447 8448 8449 8450 8451 8452 8453 8454 8455 8456 8457 8458 8459 8460 8461 8462 8463 8464 8465 8466 8467 8468 8469 8470 8471 8472 8473 8474 8475 8476 8477 8478 8479 8480 8481 8482 8483 8484 8485 8486 8487 8488 8489 8490 8491 8492 8493 8494 8495 8496 8497 8498 8499 8500 8501 8502 8503 8504 8505 8506 8507 8508
 * Returns 0 in case of success, -1 in case of failure.
 */
int
virDomainDetachDeviceFlags(virDomainPtr domain,
                           const char *xml, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "xml=%s, flags=%x", xml, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckNonNullArgGoto(xml, error);
    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainDetachDeviceFlags) {
        int ret;
        ret = conn->driver->domainDetachDeviceFlags(domain, xml, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainUpdateDeviceFlags:
 * @domain: pointer to domain object
 * @xml: pointer to XML description of one device
 * @flags: bitwise-OR of virDomainDeviceModifyFlags
 *
 * Change a virtual device on a domain, using the flags parameter
 * to control how the device is changed.  VIR_DOMAIN_AFFECT_CURRENT
 * specifies that the device change is made based on current domain
 * state.  VIR_DOMAIN_AFFECT_LIVE specifies that the device shall be
 * changed on the active domain instance only and is not added to the
 * persisted domain configuration. VIR_DOMAIN_AFFECT_CONFIG
 * specifies that the device shall be changed on the persisted domain
 * configuration only.  Note that the target hypervisor must return an
 * error if unable to satisfy flags.  E.g. the hypervisor driver will
 * return failure if LIVE is specified but it only supports modifying the
 * persisted device allocation.
 *
 * This method is used for actions such changing CDROM/Floppy device
 * media, altering the graphics configuration such as password,
 * reconfiguring the NIC device backend connectivity, etc.
 *
 * Returns 0 in case of success, -1 in case of failure.
 */
int
virDomainUpdateDeviceFlags(virDomainPtr domain,
                           const char *xml, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "xml=%s, flags=%x", xml, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckNonNullArgGoto(xml, error);
    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainUpdateDeviceFlags) {
        int ret;
        ret = conn->driver->domainUpdateDeviceFlags(domain, xml, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virConnectDomainEventRegister:
 * @conn: pointer to the connection
 * @cb: callback to the function handling domain events
 * @opaque: opaque data to pass on to the callback
 * @freecb: optional function to deallocate opaque when not used anymore
 *
 * Adds a callback to receive notifications of domain lifecycle events
 * occurring on a connection.  This function requires that an event loop
 * has been previously registered with virEventRegisterImpl() or
 * virEventRegisterDefaultImpl().
 *
 * Use of this method is no longer recommended. Instead applications
 * should try virConnectDomainEventRegisterAny() which has a more flexible
 * API contract.
 *
 * The virDomainPtr object handle passed into the callback upon delivery
 * of an event is only valid for the duration of execution of the callback.
 * If the callback wishes to keep the domain object after the callback returns,
 * it shall take a reference to it, by calling virDomainRef.
 * The reference can be released once the object is no longer required
 * by calling virDomainFree.
 *
 * Returns 0 on success, -1 on failure.  Older versions of some hypervisors
 * sometimes returned a positive number on success, but without any reliable
 * semantics on what that number represents.
 */
int
virConnectDomainEventRegister(virConnectPtr conn,
                              virConnectDomainEventCallback cb,
                              void *opaque,
                              virFreeCallback freecb)
{
    VIR_DEBUG("conn=%p, cb=%p, opaque=%p, freecb=%p", conn, cb, opaque, freecb);
    virResetLastError();

    virCheckConnectReturn(conn, -1);
    virCheckNonNullArgGoto(cb, error);

    if (conn->driver && conn->driver->connectDomainEventRegister) {
        int ret;
        ret = conn->driver->connectDomainEventRegister(conn, cb, opaque, freecb);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();
 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virConnectDomainEventDeregister:
 * @conn: pointer to the connection
 * @cb: callback to the function handling domain events
 *
 * Removes a callback previously registered with the
 * virConnectDomainEventRegister() function.
 *
 * Use of this method is no longer recommended. Instead applications
 * should try virConnectDomainEventDeregisterAny() which has a more flexible
 * API contract
 *
 * Returns 0 on success, -1 on failure.  Older versions of some hypervisors
 * sometimes returned a positive number on success, but without any reliable
 * semantics on what that number represents.
 */
int
virConnectDomainEventDeregister(virConnectPtr conn,
                                virConnectDomainEventCallback cb)
{
    VIR_DEBUG("conn=%p, cb=%p", conn, cb);

    virResetLastError();

    virCheckConnectReturn(conn, -1);
    virCheckNonNullArgGoto(cb, error);

    if (conn->driver && conn->driver->connectDomainEventDeregister) {
        int ret;
        ret = conn->driver->connectDomainEventDeregister(conn, cb);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();
 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virDomainIsActive:
 * @dom: pointer to the domain object
 *
 * Determine if the domain is currently running
 *
 * Returns 1 if running, 0 if inactive, -1 on error
 */
int
virDomainIsActive(virDomainPtr dom)
{
    VIR_DEBUG("dom=%p", dom);

    virResetLastError();

    virCheckDomainReturn(dom, -1);

    if (dom->conn->driver->domainIsActive) {
        int ret;
        ret = dom->conn->driver->domainIsActive(dom);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();
 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainIsPersistent:
 * @dom: pointer to the domain object
 *
 * Determine if the domain has a persistent configuration
 * which means it will still exist after shutting down
 *
 * Returns 1 if persistent, 0 if transient, -1 on error
 */
int
virDomainIsPersistent(virDomainPtr dom)
{
    VIR_DOMAIN_DEBUG(dom);

    virResetLastError();

    virCheckDomainReturn(dom, -1);

    if (dom->conn->driver->domainIsPersistent) {
        int ret;
        ret = dom->conn->driver->domainIsPersistent(dom);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();
 error:
    virDispatchError(dom->conn);
    return -1;
}

T
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/**
 * virDomainRename:
 * @dom: pointer to the domain object
 * @new_name: new domain name
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Rename a domain. New domain name is specified in the second
 * argument. Depending on each driver implementation it may be
 * required that domain is in a specific state.
 *
8519 8520 8521 8522 8523
 * There might be some attributes and/or elements in domain XML that if no
 * value provided at XML defining time, libvirt will derive their value from
 * the domain name. These are not updated by this API. Users are strongly
 * advised to change these after the rename was successful.
 *
T
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 * Returns 0 if successfully renamed, -1 on error
 */
int
virDomainRename(virDomainPtr dom,
                const char *new_name,
                unsigned int flags)
{
    VIR_DEBUG("dom=%p, new_name=%s", dom, NULLSTR(new_name));

    virResetLastError();
    virCheckDomainReturn(dom, -1);
8535
    virCheckNonEmptyStringArgGoto(new_name, error);
8536
    virCheckReadOnlyGoto(dom->conn->flags, error);
T
Tomas Meszaros 已提交
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    if (dom->conn->driver->domainRename) {
        int ret = dom->conn->driver->domainRename(dom, new_name, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();
 error:
    virDispatchError(dom->conn);
    return -1;
}
8550 8551 8552 8553 8554 8555 8556 8557 8558 8559 8560 8561 8562 8563 8564 8565 8566 8567 8568 8569 8570 8571 8572 8573 8574 8575 8576 8577 8578 8579 8580 8581 8582 8583 8584 8585 8586 8587 8588 8589 8590 8591 8592 8593 8594 8595 8596 8597 8598 8599 8600 8601 8602 8603 8604 8605 8606 8607 8608 8609 8610 8611 8612 8613 8614 8615 8616 8617 8618 8619 8620 8621 8622 8623 8624 8625 8626 8627 8628 8629 8630 8631 8632 8633 8634 8635 8636 8637 8638 8639 8640 8641 8642 8643 8644 8645 8646

/**
 * virDomainIsUpdated:
 * @dom: pointer to the domain object
 *
 * Determine if the domain has been updated.
 *
 * Returns 1 if updated, 0 if not, -1 on error
 */
int
virDomainIsUpdated(virDomainPtr dom)
{
    VIR_DOMAIN_DEBUG(dom);

    virResetLastError();

    virCheckDomainReturn(dom, -1);

    if (dom->conn->driver->domainIsUpdated) {
        int ret;
        ret = dom->conn->driver->domainIsUpdated(dom);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();
 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainGetJobInfo:
 * @domain: a domain object
 * @info: pointer to a virDomainJobInfo structure allocated by the user
 *
 * Extract information about progress of a background job on a domain.
 * Will return an error if the domain is not active.
 *
 * This function returns a limited amount of information in comparison
 * to virDomainGetJobStats().
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainGetJobInfo(virDomainPtr domain, virDomainJobInfoPtr info)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "info=%p", info);

    virResetLastError();

    if (info)
        memset(info, 0, sizeof(*info));

    virCheckDomainReturn(domain, -1);
    virCheckNonNullArgGoto(info, error);

    conn = domain->conn;

    if (conn->driver->domainGetJobInfo) {
        int ret;
        ret = conn->driver->domainGetJobInfo(domain, info);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetJobStats:
 * @domain: a domain object
 * @type: where to store the job type (one of virDomainJobType)
 * @params: where to store job statistics
 * @nparams: number of items in @params
 * @flags: bitwise-OR of virDomainGetJobStatsFlags
 *
 * Extract information about progress of a background job on a domain.
 * Will return an error if the domain is not active. The function returns
 * a superset of progress information provided by virDomainGetJobInfo.
 * Possible fields returned in @params are defined by VIR_DOMAIN_JOB_*
 * macros and new fields will likely be introduced in the future so callers
 * may receive fields that they do not understand in case they talk to a
 * newer server.
 *
 * When @flags contains VIR_DOMAIN_JOB_STATS_COMPLETED, the function will
 * return statistics about a recently completed job. Specifically, this
8647 8648 8649 8650 8651 8652 8653 8654 8655
 * flag may be used to query statistics of a completed incoming pre-copy
 * migration (statistics for post-copy migration are only available on the
 * source hsot). Statistics of a completed job are automatically destroyed
 * once read or when libvirtd is restarted. Note that time information
 * returned for completed migrations may be completely irrelevant unless both
 * source and destination hosts have synchronized time (i.e., NTP daemon is
 * running on both of them). The statistics of a completed job can also be
 * obtained by listening to a VIR_DOMAIN_EVENT_ID_JOB_COMPLETED event (on the
 * source host in case of a migration job).
8656 8657 8658 8659 8660 8661 8662 8663 8664 8665 8666 8667 8668 8669 8670 8671 8672 8673 8674 8675 8676 8677 8678 8679 8680 8681 8682 8683 8684 8685 8686 8687 8688 8689 8690 8691 8692 8693 8694 8695 8696 8697 8698 8699 8700 8701
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainGetJobStats(virDomainPtr domain,
                     int *type,
                     virTypedParameterPtr *params,
                     int *nparams,
                     unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "type=%p, params=%p, nparams=%p, flags=%x",
                     type, params, nparams, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    virCheckNonNullArgGoto(type, error);
    virCheckNonNullArgGoto(params, error);
    virCheckNonNullArgGoto(nparams, error);

    conn = domain->conn;

    if (conn->driver->domainGetJobStats) {
        int ret;
        ret = conn->driver->domainGetJobStats(domain, type, params,
                                              nparams, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainAbortJob:
 * @domain: a domain object
 *
 * Requests that the current background job be aborted at the
8702 8703 8704
 * soonest opportunity. In case the job is a migration in a post-copy mode,
 * virDomainAbortJob will report an error (see virDomainMigrateStartPostCopy
 * for more details).
8705 8706 8707 8708 8709 8710 8711 8712 8713 8714 8715 8716 8717 8718 8719 8720 8721 8722 8723 8724 8725 8726 8727 8728 8729 8730 8731 8732 8733 8734 8735 8736 8737 8738 8739 8740 8741 8742 8743 8744 8745 8746 8747 8748 8749 8750 8751 8752 8753 8754 8755 8756 8757 8758 8759 8760 8761 8762 8763 8764 8765 8766 8767 8768 8769 8770 8771 8772 8773 8774 8775 8776 8777 8778
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainAbortJob(virDomainPtr domain)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainAbortJob) {
        int ret;
        ret = conn->driver->domainAbortJob(domain);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virDomainMigrateSetMaxDowntime:
 * @domain: a domain object
 * @downtime: maximum tolerable downtime for live migration, in milliseconds
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Sets maximum tolerable time for which the domain is allowed to be paused
 * at the end of live migration. It's supposed to be called while the domain is
 * being live-migrated as a reaction to migration progress.
 *
 * Returns 0 in case of success, -1 otherwise.
 */
int
virDomainMigrateSetMaxDowntime(virDomainPtr domain,
                               unsigned long long downtime,
                               unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "downtime=%llu, flags=%x", downtime, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainMigrateSetMaxDowntime) {
        if (conn->driver->domainMigrateSetMaxDowntime(domain, downtime, flags) < 0)
            goto error;
        return 0;
    }

    virReportUnsupportedError();
 error:
    virDispatchError(conn);
    return -1;
}


8779 8780 8781 8782 8783 8784 8785 8786 8787 8788 8789 8790 8791 8792 8793 8794 8795 8796 8797 8798 8799 8800 8801 8802 8803 8804 8805 8806 8807 8808 8809 8810 8811 8812 8813 8814 8815 8816 8817 8818 8819
/**
 * virDomainMigrateGetMaxDowntime:
 * @domain: a domain object
 * @downtime: return value of the maximum tolerable downtime for live
 *            migration, in milliseconds
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Gets current maximum tolerable time for which the domain may be paused
 * at the end of live migration.
 *
 * Returns 0 in case of success, -1 otherwise.
 */
int
virDomainMigrateGetMaxDowntime(virDomainPtr domain,
                               unsigned long long *downtime,
                               unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "downtime = %p, flags=%x", downtime, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckNonNullArgGoto(downtime, error);

    if (conn->driver->domainMigrateGetMaxDowntime) {
        if (conn->driver->domainMigrateGetMaxDowntime(domain, downtime, flags) < 0)
            goto error;
        return 0;
    }

    virReportUnsupportedError();
 error:
    virDispatchError(conn);
    return -1;
}


8820 8821 8822 8823 8824 8825 8826 8827 8828 8829 8830 8831 8832 8833 8834 8835 8836 8837 8838 8839 8840 8841 8842 8843 8844 8845 8846 8847 8848 8849 8850 8851 8852 8853 8854 8855 8856 8857 8858 8859 8860 8861 8862 8863 8864 8865 8866 8867 8868 8869 8870 8871 8872 8873 8874 8875 8876 8877 8878 8879 8880 8881 8882 8883 8884 8885 8886 8887 8888 8889 8890 8891 8892 8893 8894 8895 8896 8897 8898 8899 8900 8901 8902 8903 8904 8905 8906 8907 8908 8909 8910 8911 8912 8913 8914 8915 8916 8917 8918 8919 8920 8921 8922 8923 8924 8925 8926 8927 8928 8929 8930 8931 8932 8933 8934 8935 8936 8937 8938 8939 8940 8941 8942 8943 8944 8945 8946 8947 8948 8949 8950 8951 8952 8953 8954 8955 8956 8957 8958 8959 8960 8961 8962 8963 8964 8965 8966 8967 8968 8969 8970 8971 8972 8973 8974 8975 8976 8977 8978 8979 8980 8981 8982 8983 8984 8985 8986
/**
 * virDomainMigrateGetCompressionCache:
 * @domain: a domain object
 * @cacheSize: return value of current size of the cache (in bytes)
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Gets current size of the cache (in bytes) used for compressing repeatedly
 * transferred memory pages during live migration.
 *
 * Returns 0 in case of success, -1 otherwise.
 */
int
virDomainMigrateGetCompressionCache(virDomainPtr domain,
                                    unsigned long long *cacheSize,
                                    unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "cacheSize=%p, flags=%x", cacheSize, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckNonNullArgGoto(cacheSize, error);

    if (conn->driver->domainMigrateGetCompressionCache) {
        if (conn->driver->domainMigrateGetCompressionCache(domain, cacheSize,
                                                           flags) < 0)
            goto error;
        return 0;
    }

    virReportUnsupportedError();
 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virDomainMigrateSetCompressionCache:
 * @domain: a domain object
 * @cacheSize: size of the cache (in bytes) used for compression
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Sets size of the cache (in bytes) used for compressing repeatedly
 * transferred memory pages during live migration. It's supposed to be called
 * while the domain is being live-migrated as a reaction to migration progress
 * and increasing number of compression cache misses obtained from
 * virDomainGetJobStats.
 *
 * Returns 0 in case of success, -1 otherwise.
 */
int
virDomainMigrateSetCompressionCache(virDomainPtr domain,
                                    unsigned long long cacheSize,
                                    unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "cacheSize=%llu, flags=%x", cacheSize, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainMigrateSetCompressionCache) {
        if (conn->driver->domainMigrateSetCompressionCache(domain, cacheSize,
                                                           flags) < 0)
            goto error;
        return 0;
    }

    virReportUnsupportedError();
 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virDomainMigrateSetMaxSpeed:
 * @domain: a domain object
 * @bandwidth: migration bandwidth limit in MiB/s
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * The maximum bandwidth (in MiB/s) that will be used to do migration
 * can be specified with the bandwidth parameter. Not all hypervisors
 * will support a bandwidth cap
 *
 * Returns 0 in case of success, -1 otherwise.
 */
int
virDomainMigrateSetMaxSpeed(virDomainPtr domain,
                            unsigned long bandwidth,
                            unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "bandwidth=%lu, flags=%x", bandwidth, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainMigrateSetMaxSpeed) {
        if (conn->driver->domainMigrateSetMaxSpeed(domain, bandwidth, flags) < 0)
            goto error;
        return 0;
    }

    virReportUnsupportedError();
 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virDomainMigrateGetMaxSpeed:
 * @domain: a domain object
 * @bandwidth: return value of current migration bandwidth limit in MiB/s
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Get the current maximum bandwidth (in MiB/s) that will be used if the
 * domain is migrated.  Not all hypervisors will support a bandwidth limit.
 *
 * Returns 0 in case of success, -1 otherwise.
 */
int
virDomainMigrateGetMaxSpeed(virDomainPtr domain,
                            unsigned long *bandwidth,
                            unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "bandwidth = %p, flags=%x", bandwidth, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckNonNullArgGoto(bandwidth, error);
    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainMigrateGetMaxSpeed) {
        if (conn->driver->domainMigrateGetMaxSpeed(domain, bandwidth, flags) < 0)
            goto error;
        return 0;
    }

    virReportUnsupportedError();
 error:
    virDispatchError(conn);
    return -1;
}


8987 8988 8989 8990 8991 8992 8993 8994 8995 8996 8997 8998 8999 9000 9001 9002 9003 9004 9005 9006 9007 9008 9009 9010 9011 9012 9013 9014 9015 9016 9017 9018
/**
 * virDomainMigrateStartPostCopy:
 * @domain: a domain object
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Starts post-copy migration. This function has to be called while
 * migration (initiated with VIR_MIGRATE_POSTCOPY flag) is in progress.
 *
 * Traditional pre-copy migration iteratively walks through guest memory
 * pages and migrates those that changed since the previous iteration. The
 * iterative phase stops when the number of dirty pages is low enough so that
 * the virtual CPUs can be paused, all dirty pages transferred to the
 * destination, where the virtual CPUs are unpaused, and all this can happen
 * within a predefined downtime period. It's clear that this process may never
 * converge if downtime is too short and/or the guest keeps changing a lot of
 * memory pages.
 *
 * When migration is switched to post-copy mode, the virtual CPUs are paused
 * immediately, only a minimum set of pages is transferred, and the CPUs are
 * unpaused on destination. The source keeps sending all remaining memory pages
 * to the destination while the guest is already running there. Whenever the
 * guest tries to read a memory page which has not been migrated yet, the
 * hypervisor has to tell the source to transfer that page in a priority
 * channel. To minimize such page faults, it is a good idea to run at least one
 * iteration of pre-copy migration before switching to post-copy.
 *
 * Post-copy migration is guaranteed to converge since each page is transferred
 * at most once no matter how fast it changes. On the other hand once the
 * guest is running on the destination host, the migration can no longer be
 * rolled back because none of the hosts has complete state. If this happens,
 * libvirt will leave the domain paused on both hosts with
 * VIR_DOMAIN_PAUSED_POSTCOPY_FAILED reason. It's up to the upper layer to
9019 9020
 * decide what to do in such case. Because of this, libvirt will refuse to
 * cancel post-copy migration via virDomainAbortJob.
9021 9022 9023 9024 9025 9026 9027 9028 9029 9030 9031 9032 9033 9034 9035 9036 9037 9038 9039 9040 9041 9042 9043 9044 9045 9046 9047 9048 9049 9050 9051 9052 9053 9054 9055 9056 9057 9058 9059 9060 9061 9062 9063 9064 9065 9066 9067 9068 9069 9070 9071 9072 9073 9074 9075 9076 9077
 *
 * The following domain life cycle events are emitted during post-copy
 * migration:
 *  VIR_DOMAIN_EVENT_SUSPENDED_POSTCOPY (on the source) -- migration entered
 *      post-copy mode.
 *  VIR_DOMAIN_EVENT_RESUMED_POSTCOPY (on the destination) -- the guest is
 *      running on the destination host while some of its memory pages still
 *      remain on the source host; neither the source nor the destination host
 *      contain a complete guest state from this point until migration
 *      finishes.
 *  VIR_DOMAIN_EVENT_RESUMED_MIGRATED (on the destination),
 *  VIR_DOMAIN_EVENT_STOPPED_MIGRATED (on the source) -- migration finished
 *      successfully and the destination host holds a complete guest state.
 *  VIR_DOMAIN_EVENT_SUSPENDED_POSTCOPY_FAILED (on the destination) -- emitted
 *      when migration fails in post-copy mode and it's unclear whether any
 *      of the hosts has a complete guest state.
 *
 * The progress of a post-copy migration can be monitored normally using
 * virDomainGetJobStats on the source host. Fetching statistics of a completed
 * post-copy migration can also be done on the source host (by calling
 * virDomainGetJobStats or listening to VIR_DOMAIN_EVENT_ID_JOB_COMPLETED
 * event, but (in contrast to pre-copy migration) the statistics are not
 * available on the destination host. Thus, VIR_DOMAIN_EVENT_ID_JOB_COMPLETED
 * event is the only way of getting statistics of a completed post-copy
 * migration of a transient domain (because the domain is removed after
 * migration and there's no domain to run virDomainGetJobStats on).
 *
 * Returns 0 in case of success, -1 otherwise.
 */
int
virDomainMigrateStartPostCopy(virDomainPtr domain,
                              unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainMigrateStartPostCopy) {
        if (conn->driver->domainMigrateStartPostCopy(domain, flags) < 0)
            goto error;
        return 0;
    }

    virReportUnsupportedError();
 error:
    virDispatchError(conn);
    return -1;
}


9078 9079 9080 9081 9082 9083 9084 9085 9086 9087 9088 9089 9090 9091 9092 9093 9094 9095 9096 9097 9098 9099 9100 9101 9102 9103 9104 9105 9106 9107 9108 9109 9110 9111 9112 9113 9114 9115 9116 9117 9118 9119 9120 9121 9122 9123 9124 9125 9126 9127 9128 9129 9130
/**
 * virConnectDomainEventRegisterAny:
 * @conn: pointer to the connection
 * @dom: pointer to the domain
 * @eventID: the event type to receive
 * @cb: callback to the function handling domain events
 * @opaque: opaque data to pass on to the callback
 * @freecb: optional function to deallocate opaque when not used anymore
 *
 * Adds a callback to receive notifications of arbitrary domain events
 * occurring on a domain.  This function requires that an event loop
 * has been previously registered with virEventRegisterImpl() or
 * virEventRegisterDefaultImpl().
 *
 * If @dom is NULL, then events will be monitored for any domain. If @dom
 * is non-NULL, then only the specific domain will be monitored.
 *
 * Most types of event have a callback providing a custom set of parameters
 * for the event. When registering an event, it is thus necessary to use
 * the VIR_DOMAIN_EVENT_CALLBACK() macro to cast the supplied function pointer
 * to match the signature of this method.
 *
 * The virDomainPtr object handle passed into the callback upon delivery
 * of an event is only valid for the duration of execution of the callback.
 * If the callback wishes to keep the domain object after the callback returns,
 * it shall take a reference to it, by calling virDomainRef().
 * The reference can be released once the object is no longer required
 * by calling virDomainFree().
 *
 * The return value from this method is a positive integer identifier
 * for the callback. To unregister a callback, this callback ID should
 * be passed to the virConnectDomainEventDeregisterAny() method.
 *
 * Returns a callback identifier on success, -1 on failure.
 */
int
virConnectDomainEventRegisterAny(virConnectPtr conn,
                                 virDomainPtr dom,
                                 int eventID,
                                 virConnectDomainEventGenericCallback cb,
                                 void *opaque,
                                 virFreeCallback freecb)
{
    VIR_DOMAIN_DEBUG(dom, "conn=%p, eventID=%d, cb=%p, opaque=%p, freecb=%p",
                     conn, eventID, cb, opaque, freecb);

    virResetLastError();

    virCheckConnectReturn(conn, -1);
    if (dom) {
        virCheckDomainGoto(dom, error);
        if (dom->conn != conn) {
            virReportInvalidArg(dom,
9131 9132
                                _("domain '%s' must match connection"),
                                dom->name);
9133 9134 9135 9136 9137 9138 9139
            goto error;
        }
    }
    virCheckNonNullArgGoto(cb, error);
    virCheckNonNegativeArgGoto(eventID, error);
    if (eventID >= VIR_DOMAIN_EVENT_ID_LAST) {
        virReportInvalidArg(eventID,
9140 9141
                            _("eventID must be less than %d"),
                            VIR_DOMAIN_EVENT_ID_LAST);
9142 9143 9144 9145 9146 9147 9148 9149 9150 9151 9152 9153 9154 9155 9156 9157 9158 9159 9160 9161 9162 9163 9164 9165 9166 9167 9168 9169 9170 9171 9172 9173 9174 9175 9176 9177 9178 9179 9180 9181 9182 9183 9184 9185 9186 9187 9188 9189 9190 9191 9192 9193 9194 9195 9196 9197 9198 9199 9200 9201 9202 9203 9204 9205 9206 9207 9208 9209 9210 9211 9212 9213 9214 9215 9216 9217 9218 9219 9220 9221 9222 9223 9224 9225 9226 9227 9228 9229 9230 9231 9232 9233 9234 9235 9236 9237 9238 9239
        goto error;
    }

    if (conn->driver && conn->driver->connectDomainEventRegisterAny) {
        int ret;
        ret = conn->driver->connectDomainEventRegisterAny(conn, dom, eventID, cb, opaque, freecb);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();
 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virConnectDomainEventDeregisterAny:
 * @conn: pointer to the connection
 * @callbackID: the callback identifier
 *
 * Removes an event callback. The callbackID parameter should be the
 * value obtained from a previous virConnectDomainEventRegisterAny() method.
 *
 * Returns 0 on success, -1 on failure.  Older versions of some hypervisors
 * sometimes returned a positive number on success, but without any reliable
 * semantics on what that number represents. */
int
virConnectDomainEventDeregisterAny(virConnectPtr conn,
                                   int callbackID)
{
    VIR_DEBUG("conn=%p, callbackID=%d", conn, callbackID);

    virResetLastError();

    virCheckConnectReturn(conn, -1);
    virCheckNonNegativeArgGoto(callbackID, error);

    if (conn->driver && conn->driver->connectDomainEventDeregisterAny) {
        int ret;
        ret = conn->driver->connectDomainEventDeregisterAny(conn, callbackID);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();
 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virDomainManagedSave:
 * @dom: pointer to the domain
 * @flags: bitwise-OR of virDomainSaveRestoreFlags
 *
 * This method will suspend a domain and save its memory contents to
 * a file on disk. After the call, if successful, the domain is not
 * listed as running anymore.
 * The difference from virDomainSave() is that libvirt is keeping track of
 * the saved state itself, and will reuse it once the domain is being
 * restarted (automatically or via an explicit libvirt call).
 * As a result any running domain is sure to not have a managed saved image.
 * This also implies that managed save only works on persistent domains,
 * since the domain must still exist in order to use virDomainCreate() to
 * restart it.
 *
 * If @flags includes VIR_DOMAIN_SAVE_BYPASS_CACHE, then libvirt will
 * attempt to bypass the file system cache while creating the file, or
 * fail if it cannot do so for the given system; this can allow less
 * pressure on file system cache, but also risks slowing saves to NFS.
 *
 * Normally, the managed saved state will remember whether the domain
 * was running or paused, and start will resume to the same state.
 * Specifying VIR_DOMAIN_SAVE_RUNNING or VIR_DOMAIN_SAVE_PAUSED in
 * @flags will override the default saved into the file.  These two
 * flags are mutually exclusive.
 *
 * Returns 0 in case of success or -1 in case of failure
 */
int
virDomainManagedSave(virDomainPtr dom, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(dom, "flags=%x", flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    conn = dom->conn;

    virCheckReadOnlyGoto(conn->flags, error);

9240 9241 9242
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_SAVE_RUNNING,
                             VIR_DOMAIN_SAVE_PAUSED,
                             error);
9243 9244 9245 9246 9247 9248 9249 9250 9251 9252 9253 9254 9255 9256 9257 9258 9259 9260 9261 9262 9263 9264 9265 9266 9267 9268 9269 9270 9271 9272 9273 9274 9275 9276 9277 9278 9279 9280 9281 9282 9283 9284 9285 9286 9287 9288 9289 9290 9291 9292 9293 9294 9295 9296 9297 9298 9299 9300 9301 9302 9303 9304 9305 9306 9307 9308 9309 9310 9311 9312 9313 9314 9315 9316 9317 9318 9319 9320 9321 9322 9323 9324 9325 9326 9327 9328 9329 9330 9331 9332 9333 9334 9335 9336 9337 9338 9339 9340 9341

    if (conn->driver->domainManagedSave) {
        int ret;

        ret = conn->driver->domainManagedSave(dom, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virDomainHasManagedSaveImage:
 * @dom: pointer to the domain
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Check if a domain has a managed save image as created by
 * virDomainManagedSave(). Note that any running domain should not have
 * such an image, as it should have been removed on restart.
 *
 * Returns 0 if no image is present, 1 if an image is present, and
 *         -1 in case of error
 */
int
virDomainHasManagedSaveImage(virDomainPtr dom, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(dom, "flags=%x", flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    conn = dom->conn;

    if (conn->driver->domainHasManagedSaveImage) {
        int ret;

        ret = conn->driver->domainHasManagedSaveImage(dom, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virDomainManagedSaveRemove:
 * @dom: pointer to the domain
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Remove any managed save image for this domain.
 *
 * Returns 0 in case of success, and -1 in case of error
 */
int
virDomainManagedSaveRemove(virDomainPtr dom, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(dom, "flags=%x", flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    conn = dom->conn;

    virCheckReadOnlyGoto(conn->flags, error);

    if (conn->driver->domainManagedSaveRemove) {
        int ret;

        ret = conn->driver->domainManagedSaveRemove(dom, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return -1;
}


9342 9343 9344 9345 9346 9347 9348 9349 9350 9351 9352 9353 9354 9355 9356 9357 9358 9359 9360 9361 9362 9363 9364 9365 9366 9367 9368 9369 9370 9371 9372 9373 9374 9375 9376 9377 9378 9379 9380 9381 9382 9383 9384 9385 9386 9387 9388 9389 9390
/**
 * virDomainManagedSaveGetXMLDesc:
 * @domain: a domain object
 * @flags: bitwise-OR of subset of virDomainXMLFlags
 *
 * This method will extract the XML description of the managed save
 * state file of a domain.
 *
 * No security-sensitive data will be included unless @flags contains
 * VIR_DOMAIN_XML_SECURE; this flag is rejected on read-only
 * connections.  For this API, @flags should not contain either
 * VIR_DOMAIN_XML_INACTIVE or VIR_DOMAIN_XML_UPDATE_CPU.
 *
 * Returns a 0 terminated UTF-8 encoded XML instance, or NULL in case of
 * error.  The caller must free() the returned value.
 */
char *
virDomainManagedSaveGetXMLDesc(virDomainPtr domain, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);

    virResetLastError();

    virCheckDomainReturn(domain, NULL);
    conn = domain->conn;

    if ((conn->flags & VIR_CONNECT_RO) && (flags & VIR_DOMAIN_XML_SECURE)) {
        virReportError(VIR_ERR_OPERATION_DENIED, "%s",
                       _("virDomainManagedSaveGetXMLDesc with secure flag"));
        goto error;
    }

    if (conn->driver->domainManagedSaveGetXMLDesc) {
        char *ret;
        ret = conn->driver->domainManagedSaveGetXMLDesc(domain, flags);
        if (!ret)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return NULL;
}

9391

9392 9393 9394 9395 9396 9397 9398 9399 9400 9401 9402 9403 9404 9405 9406 9407 9408 9409 9410 9411 9412 9413 9414 9415 9416 9417 9418 9419 9420 9421 9422 9423 9424 9425 9426 9427 9428 9429 9430 9431 9432 9433 9434 9435 9436 9437 9438 9439 9440 9441 9442 9443 9444 9445 9446 9447 9448
/**
 * virDomainManagedSaveDefineXML:
 * @domain: a domain object
 * @dxml: XML config for adjusting guest xml used on restore
 * @flags: bitwise-OR of virDomainSaveRestoreFlags
 *
 * This updates the definition of a domain stored in a saved state
 * file.
 *
 * @dxml can be used to alter host-specific portions of the domain XML
 * that will be used on the next start of the domain. For example, it is
 * possible to alter the backing filename that is associated with a
 * disk device.
 *
 * Normally, the saved state file will remember whether the domain was
 * running or paused, and restore defaults to the same state.
 * Specifying VIR_DOMAIN_SAVE_RUNNING or VIR_DOMAIN_SAVE_PAUSED in
 * @flags will override the default saved into the file; omitting both
 * leaves the file's default unchanged.  These two flags are mutually
 * exclusive.
 *
 * Returns 0 in case of success and -1 in case of failure.
 */
int
virDomainManagedSaveDefineXML(virDomainPtr domain, const char *dxml,
                              unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);

    virResetLastError();

    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_SAVE_RUNNING,
                             VIR_DOMAIN_SAVE_PAUSED,
                             error);

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    if (conn->driver->domainManagedSaveDefineXML) {
        int ret;
        ret = conn->driver->domainManagedSaveDefineXML(domain, dxml, flags);

        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


9449 9450 9451 9452 9453 9454 9455 9456 9457 9458 9459 9460 9461 9462 9463 9464 9465 9466 9467 9468 9469 9470 9471 9472 9473 9474 9475 9476 9477 9478 9479 9480 9481 9482 9483 9484 9485 9486 9487 9488 9489 9490 9491 9492 9493 9494 9495 9496 9497 9498 9499
/**
 * virDomainOpenConsole:
 * @dom: a domain object
 * @dev_name: the console, serial or parallel port device alias, or NULL
 * @st: a stream to associate with the console
 * @flags: bitwise-OR of virDomainConsoleFlags
 *
 * This opens the backend associated with a console, serial or
 * parallel port device on a guest, if the backend is supported.
 * If the @dev_name is omitted, then the first console or serial
 * device is opened. The console is associated with the passed
 * in @st stream, which should have been opened in non-blocking
 * mode for bi-directional I/O.
 *
 * By default, when @flags is 0, the open will fail if libvirt
 * detects that the console is already in use by another client;
 * passing VIR_DOMAIN_CONSOLE_FORCE will cause libvirt to forcefully
 * remove the other client prior to opening this console.
 *
 * If flag VIR_DOMAIN_CONSOLE_SAFE the console is opened only in the
 * case where the hypervisor driver supports safe (mutually exclusive)
 * console handling.
 *
 * Older servers did not support either flag, and also did not forbid
 * simultaneous clients on a console, with potentially confusing results.
 * When passing @flags of 0 in order to support a wider range of server
 * versions, it is up to the client to ensure mutual exclusion.
 *
 * Returns 0 if the console was opened, -1 on error
 */
int
virDomainOpenConsole(virDomainPtr dom,
                     const char *dev_name,
                     virStreamPtr st,
                     unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(dom, "dev_name=%s, st=%p, flags=%x",
                     NULLSTR(dev_name), st, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    conn = dom->conn;

    virCheckStreamGoto(st, error);
    virCheckReadOnlyGoto(conn->flags, error);

    if (conn != st->conn) {
        virReportInvalidArg(st,
9500 9501
                            _("stream must match connection of domain '%s'"),
                            dom->name);
9502 9503 9504 9505 9506 9507 9508 9509 9510 9511 9512 9513 9514 9515 9516 9517 9518 9519 9520 9521 9522 9523 9524 9525 9526 9527 9528 9529 9530 9531 9532 9533 9534 9535 9536 9537 9538 9539 9540 9541 9542 9543 9544 9545 9546 9547 9548 9549 9550 9551 9552 9553 9554 9555 9556 9557 9558 9559 9560 9561 9562 9563
        goto error;
    }

    if (conn->driver->domainOpenConsole) {
        int ret;
        ret = conn->driver->domainOpenConsole(dom, dev_name, st, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return -1;
}


/**
 * virDomainOpenChannel:
 * @dom: a domain object
 * @name: the channel name, or NULL
 * @st: a stream to associate with the channel
 * @flags: bitwise-OR of virDomainChannelFlags
 *
 * This opens the host interface associated with a channel device on a
 * guest, if the host interface is supported.  If @name is given, it
 * can match either the device alias (e.g. "channel0"), or the virtio
 * target name (e.g. "org.qemu.guest_agent.0").  If @name is omitted,
 * then the first channel is opened. The channel is associated with
 * the passed in @st stream, which should have been opened in
 * non-blocking mode for bi-directional I/O.
 *
 * By default, when @flags is 0, the open will fail if libvirt detects
 * that the channel is already in use by another client; passing
 * VIR_DOMAIN_CHANNEL_FORCE will cause libvirt to forcefully remove the
 * other client prior to opening this channel.
 *
 * Returns 0 if the channel was opened, -1 on error
 */
int
virDomainOpenChannel(virDomainPtr dom,
                     const char *name,
                     virStreamPtr st,
                     unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(dom, "name=%s, st=%p, flags=%x",
                     NULLSTR(name), st, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    conn = dom->conn;

    virCheckStreamGoto(st, error);
    virCheckReadOnlyGoto(conn->flags, error);

    if (conn != st->conn) {
        virReportInvalidArg(st,
9564 9565
                            _("stream must match connection of domain '%s'"),
                            dom->name);
9566 9567 9568 9569 9570 9571 9572 9573 9574 9575 9576 9577 9578 9579 9580 9581 9582 9583 9584
        goto error;
    }

    if (conn->driver->domainOpenChannel) {
        int ret;
        ret = conn->driver->domainOpenChannel(dom, name, st, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return -1;
}


9585 9586 9587 9588 9589
/**
 * virDomainGetPerfEvents:
 * @domain: a domain object
 * @params: where to store perf events setting
 * @nparams: number of items in @params
9590 9591 9592 9593 9594
 * @flags: bitwise-OR of virDomainModificationImpact
 *
 * Get all Linux perf events setting. Possible fields returned in
 * @params are defined by VIR_PERF_EVENT_* macros and new fields
 * will likely be introduced in the future.
9595
 *
9596
 * Linux perf events are performance analyzing tool in Linux.
9597 9598 9599 9600 9601
 *
 * Returns -1 in case of failure, 0 in case of success.
 */
int virDomainGetPerfEvents(virDomainPtr domain,
                           virTypedParameterPtr *params,
9602 9603
                           int *nparams,
                           unsigned int flags)
9604 9605 9606
{
    virConnectPtr conn;

9607 9608
    VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%p flags=%x",
                     params, nparams, flags);
9609 9610 9611 9612 9613 9614 9615 9616 9617 9618 9619

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    virCheckNonNullArgGoto(params, error);
    virCheckNonNullArgGoto(nparams, error);

    conn = domain->conn;

    if (conn->driver->domainGetPerfEvents) {
        int ret;
9620 9621
        ret = conn->driver->domainGetPerfEvents(domain, params,
                                                nparams, flags);
9622 9623 9624 9625 9626 9627 9628 9629 9630 9631 9632 9633 9634 9635 9636 9637 9638 9639
        if (ret < 0)
            goto error;
        return ret;
    }
    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainSetPerfEvents:
 * @domain: a domain object
 * @params: pointer to perf events parameter object
 * @nparams: number of perf event parameters (this value can be the same
 *           less than the number of parameters supported)
9640 9641 9642 9643 9644
 * @flags: bitwise-OR of virDomainModificationImpact
 *
 * Enable or disable the particular list of Linux perf events you
 * care about. The @params argument should contain any subset of
 * VIR_PERF_EVENT_ macros.
9645
 *
9646
 * Linux perf events are performance analyzing tool in Linux.
9647 9648 9649 9650 9651
 *
 * Returns -1 in case of error, 0 in case of success.
 */
int virDomainSetPerfEvents(virDomainPtr domain,
                           virTypedParameterPtr params,
9652 9653
                           int nparams,
                           unsigned int flags)
9654 9655 9656
{
    virConnectPtr conn;

9657 9658
    VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%d flags=%x",
                     params, nparams, flags);
9659 9660 9661 9662 9663 9664 9665 9666 9667 9668 9669 9670 9671 9672 9673 9674
    VIR_TYPED_PARAMS_DEBUG(params, nparams);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(params, error);
    virCheckPositiveArgGoto(nparams, error);

    if (virTypedParameterValidateSet(conn, params, nparams) < 0)
        goto error;

    if (conn->driver->domainSetPerfEvents) {
        int ret;
9675 9676
        ret = conn->driver->domainSetPerfEvents(domain, params,
                                                nparams, flags);
9677 9678 9679 9680 9681 9682 9683 9684 9685 9686 9687 9688 9689
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


9690 9691 9692 9693 9694 9695 9696 9697 9698 9699 9700 9701 9702 9703 9704 9705 9706 9707 9708 9709 9710 9711 9712 9713 9714 9715 9716 9717 9718 9719 9720 9721 9722 9723 9724 9725 9726 9727 9728 9729 9730 9731 9732 9733 9734 9735 9736 9737 9738 9739 9740 9741 9742 9743 9744 9745 9746 9747 9748 9749 9750 9751 9752 9753 9754 9755 9756 9757 9758 9759 9760 9761 9762 9763 9764 9765 9766 9767 9768 9769 9770 9771 9772 9773 9774 9775 9776 9777 9778 9779 9780 9781 9782 9783 9784 9785
/**
 * virDomainBlockJobAbort:
 * @dom: pointer to domain object
 * @disk: path to the block device, or device shorthand
 * @flags: bitwise-OR of virDomainBlockJobAbortFlags
 *
 * Cancel the active block job on the given disk.
 *
 * The @disk parameter is either an unambiguous source name of the
 * block device (the <source file='...'/> sub-element, such as
 * "/path/to/image"), or (since 0.9.5) the device target shorthand
 * (the <target dev='...'/> sub-element, such as "vda").  Valid names
 * can be found by calling virDomainGetXMLDesc() and inspecting
 * elements within //domain/devices/disk.
 *
 * If the current block job for @disk is VIR_DOMAIN_BLOCK_JOB_TYPE_PULL, then
 * by default, this function performs a synchronous operation and the caller
 * may assume that the operation has completed when 0 is returned.  However,
 * BlockJob operations may take a long time to cancel, and during this time
 * further domain interactions may be unresponsive.  To avoid this problem,
 * pass VIR_DOMAIN_BLOCK_JOB_ABORT_ASYNC in the @flags argument to enable
 * asynchronous behavior, returning as soon as possible.  When the job has
 * been canceled, a BlockJob event will be emitted, with status
 * VIR_DOMAIN_BLOCK_JOB_CANCELED (even if the ABORT_ASYNC flag was not
 * used); it is also possible to poll virDomainBlockJobInfo() to see if
 * the job cancellation is still pending.  This type of job can be restarted
 * to pick up from where it left off.
 *
 * If the current block job for @disk is VIR_DOMAIN_BLOCK_JOB_TYPE_COPY, then
 * the default is to abort the mirroring and revert to the source disk;
 * likewise, if the current job is VIR_DOMAIN_BLOCK_JOB_TYPE_ACTIVE_COMMIT,
 * the default is to abort without changing the active layer of @disk.
 * Adding @flags of VIR_DOMAIN_BLOCK_JOB_ABORT_PIVOT causes this call to
 * fail with VIR_ERR_BLOCK_COPY_ACTIVE if the copy or commit is not yet
 * ready; otherwise it will swap the disk over to the new active image
 * to end the mirroring or active commit.  An event will be issued when the
 * job is ended, and it is possible to use VIR_DOMAIN_BLOCK_JOB_ABORT_ASYNC
 * to control whether this command waits for the completion of the job.
 * Restarting a copy or active commit job requires starting over from the
 * beginning of the first phase.
 *
 * Returns -1 in case of failure, 0 when successful.
 */
int
virDomainBlockJobAbort(virDomainPtr dom, const char *disk,
                       unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(dom, "disk=%s, flags=%x", disk, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    conn = dom->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(disk, error);

    if (conn->driver->domainBlockJobAbort) {
        int ret;
        ret = conn->driver->domainBlockJobAbort(dom, disk, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainGetBlockJobInfo:
 * @dom: pointer to domain object
 * @disk: path to the block device, or device shorthand
 * @info: pointer to a virDomainBlockJobInfo structure
 * @flags: bitwise-OR of virDomainBlockJobInfoFlags
 *
 * Request block job information for the given disk.  If an operation is active
 * @info will be updated with the current progress.  The units used for the
 * bandwidth field of @info depends on @flags.  If @flags includes
 * VIR_DOMAIN_BLOCK_JOB_INFO_BANDWIDTH_BYTES, bandwidth is in bytes/second
 * (although this mode can risk failure due to overflow, depending on both
 * client and server word size); otherwise, the value is rounded up to MiB/s.
 *
 * The @disk parameter is either an unambiguous source name of the
 * block device (the <source file='...'/> sub-element, such as
 * "/path/to/image"), or (since 0.9.5) the device target shorthand
 * (the <target dev='...'/> sub-element, such as "vda").  Valid names
 * can be found by calling virDomainGetXMLDesc() and inspecting
 * elements within //domain/devices/disk.
 *
9786 9787 9788 9789 9790 9791 9792
 * As a corner case underlying hypervisor may report cur == 0 and
 * end == 0 when the block job hasn't been started yet. In this
 * case libvirt reports cur = 0 and end = 1. However, hypervisor
 * may return cur == 0 and end == 0 if the block job has finished
 * and was no-op. In this case libvirt reports cur = 1 and end = 1.
 * Since 2.3.0.
 *
9793 9794 9795 9796 9797 9798 9799 9800 9801 9802 9803 9804 9805 9806 9807 9808 9809 9810 9811 9812 9813 9814 9815 9816 9817 9818 9819 9820 9821 9822 9823 9824 9825 9826 9827 9828 9829 9830 9831 9832 9833 9834 9835 9836 9837 9838 9839 9840 9841 9842 9843 9844 9845 9846 9847 9848 9849 9850 9851 9852 9853 9854 9855 9856 9857 9858 9859 9860 9861 9862 9863 9864 9865 9866 9867 9868 9869 9870 9871 9872 9873 9874 9875 9876 9877 9878 9879 9880 9881 9882 9883 9884 9885 9886 9887 9888 9889 9890 9891 9892 9893 9894 9895 9896 9897 9898 9899 9900 9901 9902 9903 9904 9905 9906 9907 9908 9909 9910 9911 9912 9913 9914 9915 9916 9917 9918 9919 9920 9921 9922 9923 9924 9925 9926 9927 9928 9929 9930 9931 9932 9933 9934 9935 9936 9937 9938 9939 9940 9941 9942 9943 9944 9945 9946 9947 9948 9949 9950 9951 9952 9953 9954 9955 9956 9957 9958 9959 9960 9961 9962 9963 9964 9965 9966 9967 9968 9969 9970 9971 9972 9973 9974 9975 9976 9977 9978 9979 9980 9981 9982 9983 9984 9985 9986 9987 9988 9989 9990 9991 9992 9993 9994 9995 9996 9997 9998 9999 10000 10001 10002 10003 10004 10005 10006 10007 10008 10009 10010 10011 10012 10013 10014 10015 10016 10017 10018 10019 10020 10021 10022 10023 10024 10025 10026 10027 10028 10029 10030 10031 10032 10033 10034 10035 10036 10037 10038 10039 10040 10041 10042 10043 10044 10045 10046 10047 10048 10049 10050 10051 10052 10053 10054 10055 10056 10057 10058 10059 10060 10061 10062 10063 10064 10065 10066 10067 10068 10069 10070 10071 10072 10073 10074 10075 10076 10077 10078 10079 10080 10081 10082 10083 10084 10085 10086 10087 10088 10089 10090 10091 10092 10093 10094 10095 10096 10097 10098 10099
 * Returns -1 in case of failure, 0 when nothing found, 1 when info was found.
 */
int
virDomainGetBlockJobInfo(virDomainPtr dom, const char *disk,
                         virDomainBlockJobInfoPtr info, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(dom, "disk=%s, info=%p, flags=%x", disk, info, flags);

    virResetLastError();

    if (info)
        memset(info, 0, sizeof(*info));

    virCheckDomainReturn(dom, -1);
    conn = dom->conn;

    virCheckNonNullArgGoto(disk, error);
    virCheckNonNullArgGoto(info, error);

    if (conn->driver->domainGetBlockJobInfo) {
        int ret;
        ret = conn->driver->domainGetBlockJobInfo(dom, disk, info, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainBlockJobSetSpeed:
 * @dom: pointer to domain object
 * @disk: path to the block device, or device shorthand
 * @bandwidth: specify bandwidth limit; flags determine the unit
 * @flags: bitwise-OR of virDomainBlockJobSetSpeedFlags
 *
 * Set the maximimum allowable bandwidth that a block job may consume.  If
 * bandwidth is 0, the limit will revert to the hypervisor default of
 * unlimited.
 *
 * If @flags contains VIR_DOMAIN_BLOCK_JOB_SPEED_BANDWIDTH_BYTES, @bandwidth
 * is in bytes/second; otherwise, it is in MiB/second.  Values larger than
 * 2^52 bytes/sec may be rejected due to overflow considerations based on
 * the word size of both client and server, and values larger than 2^31
 * bytes/sec may cause overflow problems if later queried by
 * virDomainGetBlockJobInfo() without scaling.  Hypervisors may further
 * restrict the range of valid bandwidth values.
 *
 * The @disk parameter is either an unambiguous source name of the
 * block device (the <source file='...'/> sub-element, such as
 * "/path/to/image"), or (since 0.9.5) the device target shorthand
 * (the <target dev='...'/> sub-element, such as "vda").  Valid names
 * can be found by calling virDomainGetXMLDesc() and inspecting
 * elements within //domain/devices/disk.
 *
 * Returns -1 in case of failure, 0 when successful.
 */
int
virDomainBlockJobSetSpeed(virDomainPtr dom, const char *disk,
                          unsigned long bandwidth, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(dom, "disk=%s, bandwidth=%lu, flags=%x",
                     disk, bandwidth, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    conn = dom->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(disk, error);

    if (conn->driver->domainBlockJobSetSpeed) {
        int ret;
        ret = conn->driver->domainBlockJobSetSpeed(dom, disk, bandwidth, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainBlockPull:
 * @dom: pointer to domain object
 * @disk: path to the block device, or device shorthand
 * @bandwidth: (optional) specify bandwidth limit; flags determine the unit
 * @flags: bitwise-OR of virDomainBlockPullFlags
 *
 * Populate a disk image with data from its backing image.  Once all data from
 * its backing image has been pulled, the disk no longer depends on a backing
 * image.  This function pulls data for the entire device in the background.
 * Progress of the operation can be checked with virDomainGetBlockJobInfo() and
 * the operation can be aborted with virDomainBlockJobAbort().  When finished,
 * an asynchronous event is raised to indicate the final status.  To move
 * data in the opposite direction, see virDomainBlockCommit().
 *
 * The @disk parameter is either an unambiguous source name of the
 * block device (the <source file='...'/> sub-element, such as
 * "/path/to/image"), or (since 0.9.5) the device target shorthand
 * (the <target dev='...'/> sub-element, such as "vda").  Valid names
 * can be found by calling virDomainGetXMLDesc() and inspecting
 * elements within //domain/devices/disk.
 *
 * The maximum bandwidth that will be used to do the copy can be
 * specified with the @bandwidth parameter.  If set to 0, there is no
 * limit.  If @flags includes VIR_DOMAIN_BLOCK_PULL_BANDWIDTH_BYTES,
 * @bandwidth is in bytes/second; otherwise, it is in MiB/second.
 * Values larger than 2^52 bytes/sec may be rejected due to overflow
 * considerations based on the word size of both client and server,
 * and values larger than 2^31 bytes/sec may cause overflow problems
 * if later queried by virDomainGetBlockJobInfo() without scaling.
 * Hypervisors may further restrict the range of valid bandwidth
 * values.  Some hypervisors do not support this feature and will
 * return an error if bandwidth is not 0; in this case, it might still
 * be possible for a later call to virDomainBlockJobSetSpeed() to
 * succeed.  The actual speed can be determined with
 * virDomainGetBlockJobInfo().
 *
 * This is shorthand for virDomainBlockRebase() with a NULL base.
 *
 * Returns 0 if the operation has started, -1 on failure.
 */
int
virDomainBlockPull(virDomainPtr dom, const char *disk,
                   unsigned long bandwidth, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(dom, "disk=%s, bandwidth=%lu, flags=%x",
                     disk, bandwidth, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    conn = dom->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(disk, error);

    if (conn->driver->domainBlockPull) {
        int ret;
        ret = conn->driver->domainBlockPull(dom, disk, bandwidth, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainBlockRebase:
 * @dom: pointer to domain object
 * @disk: path to the block device, or device shorthand
 * @base: path to backing file to keep, or device shorthand,
 *        or NULL for no backing file
 * @bandwidth: (optional) specify bandwidth limit; flags determine the unit
 * @flags: bitwise-OR of virDomainBlockRebaseFlags
 *
 * Populate a disk image with data from its backing image chain, and
 * setting the backing image to @base, or alternatively copy an entire
 * backing chain to a new file @base.
 *
 * When @flags is 0, this starts a pull, where @base must be the absolute
 * path of one of the backing images further up the chain, or NULL to
 * convert the disk image so that it has no backing image.  Once all
 * data from its backing image chain has been pulled, the disk no
 * longer depends on those intermediate backing images.  This function
 * pulls data for the entire device in the background.  Progress of
 * the operation can be checked with virDomainGetBlockJobInfo() with a
 * job type of VIR_DOMAIN_BLOCK_JOB_TYPE_PULL, and the operation can be
 * aborted with virDomainBlockJobAbort().  When finished, an asynchronous
 * event is raised to indicate the final status, and the job no longer
 * exists.  If the job is aborted, a new one can be started later to
 * resume from the same point.
 *
 * If @flags contains VIR_DOMAIN_BLOCK_REBASE_RELATIVE, the name recorded
 * into the active disk as the location for @base will be kept relative.
 * The operation will fail if libvirt can't infer the name.
 *
 * When @flags includes VIR_DOMAIN_BLOCK_REBASE_COPY, this starts a copy,
 * where @base must be the name of a new file to copy the chain to.  By
 * default, the copy will pull the entire source chain into the destination
 * file, but if @flags also contains VIR_DOMAIN_BLOCK_REBASE_SHALLOW, then
 * only the top of the source chain will be copied (the source and
 * destination have a common backing file).  By default, @base will be
 * created with the same file format as the source, but this can be altered
 * by adding VIR_DOMAIN_BLOCK_REBASE_COPY_RAW to force the copy to be raw
 * (does not make sense with the shallow flag unless the source is also raw),
 * or by using VIR_DOMAIN_BLOCK_REBASE_REUSE_EXT to reuse an existing file
 * which was pre-created with the correct format and metadata and sufficient
 * size to hold the copy. In case the VIR_DOMAIN_BLOCK_REBASE_SHALLOW flag
 * is used the pre-created file has to exhibit the same guest visible contents
 * as the backing file of the original image. This allows a management app to
 * pre-create files with relative backing file names, rather than the default
 * of absolute backing file names; as a security precaution, you should
 * generally only use reuse_ext with the shallow flag and a non-raw
 * destination file.  By default, the copy destination will be treated as
 * type='file', but using VIR_DOMAIN_BLOCK_REBASE_COPY_DEV treats the
 * destination as type='block' (affecting how virDomainGetBlockInfo() will
 * report allocation after pivoting).
 *
 * A copy job has two parts; in the first phase, the @bandwidth parameter
 * affects how fast the source is pulled into the destination, and the job
 * can only be canceled by reverting to the source file; progress in this
 * phase can be tracked via the virDomainBlockJobInfo() command, with a
 * job type of VIR_DOMAIN_BLOCK_JOB_TYPE_COPY.  The job transitions to the
 * second phase when the job info states cur == end, and remains alive to
 * mirror all further changes to both source and destination.  The user
 * must call virDomainBlockJobAbort() to end the mirroring while choosing
 * whether to revert to source or pivot to the destination.  An event is
 * issued when the job ends, and depending on the hypervisor, an event may
 * also be issued when the job transitions from pulling to mirroring.  If
 * the job is aborted, a new job will have to start over from the beginning
 * of the first phase.
 *
 * Some hypervisors will restrict certain actions, such as virDomainSave()
 * or virDomainDetachDevice(), while a copy job is active; they may
 * also restrict a copy job to transient domains.
 *
 * The @disk parameter is either an unambiguous source name of the
 * block device (the <source file='...'/> sub-element, such as
 * "/path/to/image"), or the device target shorthand (the
 * <target dev='...'/> sub-element, such as "vda").  Valid names
 * can be found by calling virDomainGetXMLDesc() and inspecting
 * elements within //domain/devices/disk.
 *
 * The @base parameter can be either a path to a file within the backing
 * chain, or the device target shorthand (the <target dev='...'/>
 * sub-element, such as "vda") followed by an index to the backing chain
 * enclosed in square brackets. Backing chain indexes can be found by
 * inspecting //disk//backingStore/@index in the domain XML. Thus, for
 * example, "vda[3]" refers to the backing store with index equal to "3"
 * in the chain of disk "vda".
 *
 * The maximum bandwidth that will be used to do the copy can be
 * specified with the @bandwidth parameter.  If set to 0, there is no
 * limit.  If @flags includes VIR_DOMAIN_BLOCK_REBASE_BANDWIDTH_BYTES,
 * @bandwidth is in bytes/second; otherwise, it is in MiB/second.
 * Values larger than 2^52 bytes/sec may be rejected due to overflow
 * considerations based on the word size of both client and server,
 * and values larger than 2^31 bytes/sec may cause overflow problems
 * if later queried by virDomainGetBlockJobInfo() without scaling.
 * Hypervisors may further restrict the range of valid bandwidth
 * values.  Some hypervisors do not support this feature and will
 * return an error if bandwidth is not 0; in this case, it might still
 * be possible for a later call to virDomainBlockJobSetSpeed() to
 * succeed.  The actual speed can be determined with
 * virDomainGetBlockJobInfo().
 *
 * When @base is NULL and @flags is 0, this is identical to
 * virDomainBlockPull().  When @flags contains VIR_DOMAIN_BLOCK_REBASE_COPY,
 * this command is shorthand for virDomainBlockCopy() where the destination
 * XML encodes @base as a <disk type='file'>, @bandwidth is properly scaled
 * and passed as a typed parameter, the shallow and reuse external flags
 * are preserved, and remaining flags control whether the XML encodes a
 * destination format of raw instead of leaving the destination identical
 * to the source format or probed from the reused file.
 *
 * Returns 0 if the operation has started, -1 on failure.
 */
int
virDomainBlockRebase(virDomainPtr dom, const char *disk,
                     const char *base, unsigned long bandwidth,
                     unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(dom, "disk=%s, base=%s, bandwidth=%lu, flags=%x",
                     disk, NULLSTR(base), bandwidth, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    conn = dom->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(disk, error);

    if (flags & VIR_DOMAIN_BLOCK_REBASE_COPY) {
        virCheckNonNullArgGoto(base, error);
    } else if (flags & (VIR_DOMAIN_BLOCK_REBASE_SHALLOW |
                        VIR_DOMAIN_BLOCK_REBASE_REUSE_EXT |
                        VIR_DOMAIN_BLOCK_REBASE_COPY_RAW |
                        VIR_DOMAIN_BLOCK_REBASE_COPY_DEV)) {
10100 10101
        virReportInvalidArg(flags, "%s",
                            _("use of flags requires a copy job"));
10102 10103 10104 10105 10106 10107 10108 10109 10110 10111 10112 10113 10114 10115 10116 10117 10118 10119 10120 10121 10122 10123 10124 10125 10126 10127 10128 10129 10130 10131 10132 10133 10134 10135 10136 10137 10138 10139 10140 10141 10142 10143 10144 10145 10146 10147 10148 10149 10150 10151 10152 10153 10154 10155 10156 10157 10158 10159 10160 10161 10162 10163 10164 10165 10166 10167 10168 10169 10170 10171 10172
        goto error;
    }

    if (conn->driver->domainBlockRebase) {
        int ret;
        ret = conn->driver->domainBlockRebase(dom, disk, base, bandwidth,
                                              flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainBlockCopy:
 * @dom: pointer to domain object
 * @disk: path to the block device, or device shorthand
 * @destxml: XML description of the copy destination
 * @params: Pointer to block copy parameter objects, or NULL
 * @nparams: Number of block copy parameters (this value can be the same or
 *           less than the number of parameters supported)
 * @flags: bitwise-OR of virDomainBlockCopyFlags
 *
 * Copy the guest-visible contents of a disk image to a new file described
 * by @destxml.  The destination XML has a top-level element of <disk>, and
 * resembles what is used when hot-plugging a disk via virDomainAttachDevice(),
 * except that only sub-elements related to describing the new host resource
 * are necessary (sub-elements related to the guest view, such as <target>,
 * are ignored).  It is strongly recommended to include a <driver type='...'/>
 * format designation for the destination, to avoid the potential of any
 * security problem that might be caused by probing a file for its format.
 *
 * This command starts a long-running copy.  By default, the copy will pull
 * the entire source chain into the destination file, but if @flags also
 * contains VIR_DOMAIN_BLOCK_COPY_SHALLOW, then only the top of the source
 * chain will be copied (the source and destination have a common backing
 * file).  The format of the destination file is controlled by the <driver>
 * sub-element of the XML.  The destination will be created unless the
 * VIR_DOMAIN_BLOCK_COPY_REUSE_EXT flag is present stating that the file
 * was pre-created with the correct format and metadata and sufficient
 * size to hold the copy. In case the VIR_DOMAIN_BLOCK_COPY_SHALLOW flag
 * is used the pre-created file has to exhibit the same guest visible contents
 * as the backing file of the original image. This allows a management app to
 * pre-create files with relative backing file names, rather than the default
 * of absolute backing file names.
 *
 * A copy job has two parts; in the first phase, the source is copied into
 * the destination, and the job can only be canceled by reverting to the
 * source file; progress in this phase can be tracked via the
 * virDomainBlockJobInfo() command, with a job type of
 * VIR_DOMAIN_BLOCK_JOB_TYPE_COPY.  The job transitions to the second
 * phase when the job info states cur == end, and remains alive to mirror
 * all further changes to both source and destination.  The user must
 * call virDomainBlockJobAbort() to end the mirroring while choosing
 * whether to revert to source or pivot to the destination.  An event is
 * issued when the job ends, and depending on the hypervisor, an event may
 * also be issued when the job transitions from pulling to mirroring.  If
 * the job is aborted, a new job will have to start over from the beginning
 * of the first phase.
 *
 * Some hypervisors will restrict certain actions, such as virDomainSave()
 * or virDomainDetachDevice(), while a copy job is active; they may
 * also restrict a copy job to transient domains.
 *
10173 10174 10175 10176
 * If @flags contains VIR_DOMAIN_BLOCK_COPY_TRANSIENT_JOB the job will not be
 * recoverable if the VM is turned off while job is active. This flag will
 * remove the restriction of copy jobs to transient domains.
 *
10177 10178 10179 10180 10181 10182 10183 10184 10185 10186 10187 10188 10189 10190 10191 10192 10193 10194 10195 10196 10197 10198 10199 10200 10201 10202 10203 10204 10205 10206 10207 10208 10209 10210 10211 10212 10213 10214 10215 10216 10217 10218 10219 10220 10221 10222 10223 10224 10225 10226 10227 10228 10229 10230 10231 10232 10233 10234 10235 10236 10237 10238 10239 10240 10241 10242 10243 10244 10245 10246 10247 10248 10249 10250 10251 10252 10253 10254 10255 10256 10257 10258 10259 10260 10261 10262 10263 10264 10265 10266 10267 10268 10269 10270 10271 10272 10273 10274 10275 10276 10277 10278 10279 10280 10281 10282 10283 10284 10285 10286 10287 10288 10289 10290 10291 10292 10293 10294 10295 10296 10297 10298 10299 10300 10301 10302 10303 10304 10305 10306 10307 10308 10309 10310 10311 10312 10313 10314 10315 10316 10317 10318 10319 10320 10321 10322 10323 10324 10325 10326 10327 10328 10329 10330 10331 10332 10333 10334 10335 10336 10337 10338 10339 10340 10341 10342 10343 10344 10345 10346 10347 10348 10349 10350 10351 10352 10353 10354 10355 10356 10357 10358 10359 10360 10361 10362 10363 10364 10365 10366 10367 10368 10369 10370 10371 10372 10373 10374 10375 10376 10377 10378 10379 10380 10381 10382 10383 10384 10385 10386 10387 10388 10389 10390 10391 10392 10393 10394 10395 10396 10397 10398 10399 10400 10401 10402 10403 10404 10405 10406 10407 10408 10409 10410 10411 10412 10413 10414 10415 10416 10417 10418 10419 10420 10421 10422 10423 10424
 * The @disk parameter is either an unambiguous source name of the
 * block device (the <source file='...'/> sub-element, such as
 * "/path/to/image"), or the device target shorthand (the
 * <target dev='...'/> sub-element, such as "vda").  Valid names
 * can be found by calling virDomainGetXMLDesc() and inspecting
 * elements within //domain/devices/disk.
 *
 * The @params and @nparams arguments can be used to set hypervisor-specific
 * tuning parameters, such as maximum bandwidth or granularity.  For a
 * parameter that the hypervisor understands, explicitly specifying 0
 * behaves the same as omitting the parameter, to use the hypervisor
 * default; however, omitting a parameter is less likely to fail.
 *
 * This command is a superset of the older virDomainBlockRebase() when used
 * with the VIR_DOMAIN_BLOCK_REBASE_COPY flag, and offers better control
 * over the destination format, the ability to copy to a destination that
 * is not a local file, and the possibility of additional tuning parameters.
 *
 * Returns 0 if the operation has started, -1 on failure.
 */
int
virDomainBlockCopy(virDomainPtr dom, const char *disk,
                   const char *destxml,
                   virTypedParameterPtr params,
                   int nparams,
                   unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(dom,
                     "disk=%s, destxml=%s, params=%p, nparams=%d, flags=%x",
                     disk, destxml, params, nparams, flags);
    VIR_TYPED_PARAMS_DEBUG(params, nparams);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    conn = dom->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(disk, error);
    virCheckNonNullArgGoto(destxml, error);
    virCheckNonNegativeArgGoto(nparams, error);
    if (nparams)
        virCheckNonNullArgGoto(params, error);

    if (conn->driver->domainBlockCopy) {
        int ret;
        ret = conn->driver->domainBlockCopy(dom, disk, destxml,
                                            params, nparams, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainBlockCommit:
 * @dom: pointer to domain object
 * @disk: path to the block device, or device shorthand
 * @base: path to backing file to merge into, or device shorthand,
 *        or NULL for default
 * @top: path to file within backing chain that contains data to be merged,
 *       or device shorthand, or NULL to merge all possible data
 * @bandwidth: (optional) specify bandwidth limit; flags determine the unit
 * @flags: bitwise-OR of virDomainBlockCommitFlags
 *
 * Commit changes that were made to temporary top-level files within a disk
 * image backing file chain into a lower-level base file.  In other words,
 * take all the difference between @base and @top, and update @base to contain
 * that difference; after the commit, any portion of the chain that previously
 * depended on @top will now depend on @base, and all files after @base up
 * to and including @top will now be invalidated.  A typical use of this
 * command is to reduce the length of a backing file chain after taking an
 * external disk snapshot.  To move data in the opposite direction, see
 * virDomainBlockPull().
 *
 * This command starts a long-running commit block job, whose status may
 * be tracked by virDomainBlockJobInfo() with a job type of
 * VIR_DOMAIN_BLOCK_JOB_TYPE_COMMIT, and the operation can be aborted with
 * virDomainBlockJobAbort().  When finished, an asynchronous event is
 * raised to indicate the final status, and the job no longer exists.  If
 * the job is aborted, it is up to the hypervisor whether starting a new
 * job will resume from the same point, or start over.
 *
 * As a special case, if @top is the active image (or NULL), and @flags
 * includes VIR_DOMAIN_BLOCK_COMMIT_ACTIVE, the block job will have a type
 * of VIR_DOMAIN_BLOCK_JOB_TYPE_ACTIVE_COMMIT, and operates in two phases.
 * In the first phase, the contents are being committed into @base, and the
 * job can only be canceled.  The job transitions to the second phase when
 * the job info states cur == end, and remains alive to keep all further
 * changes to @top synchronized into @base; an event with status
 * VIR_DOMAIN_BLOCK_JOB_READY is also issued to mark the job transition.
 * Once in the second phase, the user must choose whether to cancel the job
 * (keeping @top as the active image, but now containing only the changes
 * since the time the job ended) or to pivot the job (adjusting to @base as
 * the active image, and invalidating @top).
 *
 * Be aware that this command may invalidate files even if it is aborted;
 * the user is cautioned against relying on the contents of invalidated
 * intermediate files such as @top (when @top is not the active image)
 * without manually rebasing those files to use a backing file of a
 * read-only copy of @base prior to the point where the commit operation
 * was started (and such a rebase cannot be safely done until the commit
 * has successfully completed).  However, the domain itself will not have
 * any issues; the active layer remains valid throughout the entire commit
 * operation.
 *
 * Some hypervisors may support a shortcut where if @flags contains
 * VIR_DOMAIN_BLOCK_COMMIT_DELETE, then this command will unlink all files
 * that were invalidated, after the commit successfully completes.
 *
 * If @flags contains VIR_DOMAIN_BLOCK_COMMIT_RELATIVE, the name recorded
 * into the overlay of the @top image (if there is such image) as the
 * path to the new backing file will be kept relative to other images.
 * The operation will fail if libvirt can't infer the name.
 *
 * By default, if @base is NULL, the commit target will be the bottom of
 * the backing chain; if @flags contains VIR_DOMAIN_BLOCK_COMMIT_SHALLOW,
 * then the immediate backing file of @top will be used instead.  If @top
 * is NULL, the active image at the top of the chain will be used.  Some
 * hypervisors place restrictions on how much can be committed, and might
 * fail if @base is not the immediate backing file of @top, or if @top is
 * the active layer in use by a running domain but @flags did not include
 * VIR_DOMAIN_BLOCK_COMMIT_ACTIVE, or if @top is not the top-most file;
 * restrictions may differ for online vs. offline domains.
 *
 * The @disk parameter is either an unambiguous source name of the
 * block device (the <source file='...'/> sub-element, such as
 * "/path/to/image"), or the device target shorthand (the
 * <target dev='...'/> sub-element, such as "vda").  Valid names
 * can be found by calling virDomainGetXMLDesc() and inspecting
 * elements within //domain/devices/disk.
 *
 * The @base and @top parameters can be either paths to files within the
 * backing chain, or the device target shorthand (the <target dev='...'/>
 * sub-element, such as "vda") followed by an index to the backing chain
 * enclosed in square brackets. Backing chain indexes can be found by
 * inspecting //disk//backingStore/@index in the domain XML. Thus, for
 * example, "vda[3]" refers to the backing store with index equal to "3"
 * in the chain of disk "vda".
 *
 * The maximum bandwidth that will be used to do the commit can be
 * specified with the @bandwidth parameter.  If set to 0, there is no
 * limit.  If @flags includes VIR_DOMAIN_BLOCK_COMMIT_BANDWIDTH_BYTES,
 * @bandwidth is in bytes/second; otherwise, it is in MiB/second.
 * Values larger than 2^52 bytes/sec may be rejected due to overflow
 * considerations based on the word size of both client and server,
 * and values larger than 2^31 bytes/sec may cause overflow problems
 * if later queried by virDomainGetBlockJobInfo() without scaling.
 * Hypervisors may further restrict the range of valid bandwidth
 * values.  Some hypervisors do not support this feature and will
 * return an error if bandwidth is not 0; in this case, it might still
 * be possible for a later call to virDomainBlockJobSetSpeed() to
 * succeed.  The actual speed can be determined with
 * virDomainGetBlockJobInfo().
 *
 * Returns 0 if the operation has started, -1 on failure.
 */
int
virDomainBlockCommit(virDomainPtr dom, const char *disk,
                     const char *base, const char *top,
                     unsigned long bandwidth, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(dom, "disk=%s, base=%s, top=%s, bandwidth=%lu, flags=%x",
                     disk, NULLSTR(base), NULLSTR(top), bandwidth, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    conn = dom->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(disk, error);

    if (conn->driver->domainBlockCommit) {
        int ret;
        ret = conn->driver->domainBlockCommit(dom, disk, base, top, bandwidth,
                                              flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainOpenGraphics:
 * @dom: pointer to domain object
 * @idx: index of graphics config to open
 * @fd: file descriptor to attach graphics to
 * @flags: bitwise-OR of virDomainOpenGraphicsFlags
 *
 * This will attempt to connect the file descriptor @fd, to
 * the graphics backend of @dom. If @dom has multiple graphics
 * backends configured, then @idx will determine which one is
 * opened, starting from @idx 0.
 *
 * To disable any authentication, pass the VIR_DOMAIN_OPEN_GRAPHICS_SKIPAUTH
 * constant for @flags.
 *
 * The caller should use an anonymous socketpair to open
 * @fd before invocation.
 *
 * This method can only be used when connected to a local
 * libvirt hypervisor, over a UNIX domain socket. Attempts
 * to use this method over a TCP connection will always fail
 *
 * Returns 0 on success, -1 on failure
 */
int
virDomainOpenGraphics(virDomainPtr dom,
                      unsigned int idx,
                      int fd,
                      unsigned int flags)
{
    struct stat sb;
    VIR_DOMAIN_DEBUG(dom, "idx=%u, fd=%d, flags=%x",
                     idx, fd, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    virCheckNonNegativeArgGoto(fd, error);

    if (fstat(fd, &sb) < 0) {
        virReportSystemError(errno,
                             _("Unable to access file descriptor %d"), fd);
        goto error;
    }

    if (!S_ISSOCK(sb.st_mode)) {
        virReportInvalidArg(fd,
10425 10426
                            _("fd %d must be a socket"),
                            fd);
10427 10428 10429 10430 10431 10432 10433 10434 10435 10436 10437 10438 10439 10440 10441 10442 10443 10444 10445 10446 10447 10448 10449 10450 10451 10452 10453 10454 10455 10456 10457 10458 10459 10460 10461 10462 10463 10464 10465 10466 10467 10468 10469 10470 10471 10472 10473 10474 10475 10476 10477 10478 10479 10480 10481 10482 10483 10484 10485 10486 10487 10488 10489 10490 10491 10492 10493 10494 10495 10496 10497 10498 10499 10500 10501 10502 10503 10504 10505 10506 10507 10508 10509 10510 10511 10512 10513 10514 10515 10516 10517 10518 10519 10520 10521 10522 10523 10524 10525 10526 10527 10528 10529 10530 10531 10532 10533 10534 10535 10536 10537 10538 10539 10540 10541 10542 10543 10544 10545 10546 10547 10548 10549 10550 10551 10552 10553 10554 10555 10556 10557 10558 10559 10560 10561 10562 10563 10564 10565 10566 10567 10568 10569 10570 10571 10572 10573 10574 10575 10576 10577 10578 10579 10580 10581 10582 10583 10584 10585 10586 10587 10588 10589 10590 10591 10592 10593 10594 10595 10596 10597 10598 10599 10600 10601 10602 10603 10604 10605 10606 10607 10608 10609 10610 10611 10612 10613 10614 10615 10616 10617 10618 10619 10620 10621 10622 10623 10624 10625 10626 10627 10628 10629 10630 10631 10632 10633
        goto error;
    }

    virCheckReadOnlyGoto(dom->conn->flags, error);

    if (!VIR_DRV_SUPPORTS_FEATURE(dom->conn->driver, dom->conn,
                                  VIR_DRV_FEATURE_FD_PASSING)) {
        virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                       _("fd passing is not supported by this connection"));
        goto error;
    }

    if (dom->conn->driver->domainOpenGraphics) {
        int ret;
        ret = dom->conn->driver->domainOpenGraphics(dom, idx, fd, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainOpenGraphicsFD:
 * @dom: pointer to domain object
 * @idx: index of graphics config to open
 * @flags: bitwise-OR of virDomainOpenGraphicsFlags
 *
 * This will create a socket pair connected to the graphics backend of @dom.
 * One end of the socket will be returned on success, and the other end is
 * handed to the hypervisor.
 * If @dom has multiple graphics backends configured, then @idx will determine
 * which one is opened, starting from @idx 0.
 *
 * To disable any authentication, pass the VIR_DOMAIN_OPEN_GRAPHICS_SKIPAUTH
 * constant for @flags.
 *
 * This method can only be used when connected to a local
 * libvirt hypervisor, over a UNIX domain socket. Attempts
 * to use this method over a TCP connection will always fail.
 *
 * Returns an fd on success, -1 on failure
 */
int
virDomainOpenGraphicsFD(virDomainPtr dom,
                        unsigned int idx,
                        unsigned int flags)
{
    VIR_DOMAIN_DEBUG(dom, "idx=%u, flags=%x", idx, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);

    virCheckReadOnlyGoto(dom->conn->flags, error);

    if (!VIR_DRV_SUPPORTS_FEATURE(dom->conn->driver, dom->conn,
                                  VIR_DRV_FEATURE_FD_PASSING)) {
        virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                       _("fd passing is not supported by this connection"));
        goto error;
    }

    if (dom->conn->driver->domainOpenGraphicsFD) {
        int ret;
        ret = dom->conn->driver->domainOpenGraphicsFD(dom, idx, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainSetBlockIoTune:
 * @dom: pointer to domain object
 * @disk: path to the block device, or device shorthand
 * @params: Pointer to blkio parameter objects
 * @nparams: Number of blkio parameters (this value can be the same or
 *           less than the number of parameters supported)
 * @flags: bitwise-OR of virDomainModificationImpact
 *
 * Change all or a subset of the per-device block IO tunables.
 *
 * The @disk parameter is either an unambiguous source name of the
 * block device (the <source file='...'/> sub-element, such as
 * "/path/to/image"), or the device target shorthand (the <target
 * dev='...'/> sub-element, such as "xvda").  Valid names can be found
 * by calling virDomainGetXMLDesc() and inspecting elements
 * within //domain/devices/disk.
 *
 * Returns -1 in case of error, 0 in case of success.
 */
int
virDomainSetBlockIoTune(virDomainPtr dom,
                        const char *disk,
                        virTypedParameterPtr params,
                        int nparams,
                        unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(dom, "disk=%s, params=%p, nparams=%d, flags=%x",
                     disk, params, nparams, flags);
    VIR_TYPED_PARAMS_DEBUG(params, nparams);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    conn = dom->conn;

    virCheckReadOnlyGoto(conn->flags, error);
    virCheckNonNullArgGoto(disk, error);
    virCheckPositiveArgGoto(nparams, error);
    virCheckNonNullArgGoto(params, error);

    if (virTypedParameterValidateSet(dom->conn, params, nparams) < 0)
        goto error;

    if (conn->driver->domainSetBlockIoTune) {
        int ret;
        ret = conn->driver->domainSetBlockIoTune(dom, disk, params, nparams, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainGetBlockIoTune:
 * @dom: pointer to domain object
 * @disk: path to the block device, or device shorthand
 * @params: Pointer to blkio parameter object
 *          (return value, allocated by the caller)
 * @nparams: Pointer to number of blkio parameters
 * @flags: bitwise-OR of virDomainModificationImpact and virTypedParameterFlags
 *
 * Get all block IO tunable parameters for a given device.  On input,
 * @nparams gives the size of the @params array; on output, @nparams
 * gives how many slots were filled with parameter information, which
 * might be less but will not exceed the input value.
 *
 * As a special case, calling with @params as NULL and @nparams as 0
 * on input will cause @nparams on output to contain the number of
 * parameters supported by the hypervisor, either for the given @disk
 * (note that block devices of different types might support different
 * parameters), or if @disk is NULL, for all possible disks. The
 * caller should then allocate @params array,
 * i.e. (sizeof(@virTypedParameter) * @nparams) bytes and call the API
 * again.  See virDomainGetMemoryParameters() for more details.
 *
 * The @disk parameter is either an unambiguous source name of the
 * block device (the <source file='...'/> sub-element, such as
 * "/path/to/image"), or the device target shorthand (the <target
 * dev='...'/> sub-element, such as "xvda").  Valid names can be found
 * by calling virDomainGetXMLDesc() and inspecting elements
 * within //domain/devices/disk.  This parameter cannot be NULL
 * unless @nparams is 0 on input.
 *
 * Returns -1 in case of error, 0 in case of success.
 */
int
virDomainGetBlockIoTune(virDomainPtr dom,
                        const char *disk,
                        virTypedParameterPtr params,
                        int *nparams,
                        unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(dom, "disk=%s, params=%p, nparams=%d, flags=%x",
                     NULLSTR(disk), params, (nparams) ? *nparams : -1, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);

    virCheckNonNullArgGoto(nparams, error);
    virCheckNonNegativeArgGoto(*nparams, error);
    if (*nparams != 0) {
        virCheckNonNullArgGoto(params, error);
        virCheckNonNullArgGoto(disk, error);
    }

    if (VIR_DRV_SUPPORTS_FEATURE(dom->conn->driver, dom->conn,
                                 VIR_DRV_FEATURE_TYPED_PARAM_STRING))
        flags |= VIR_TYPED_PARAM_STRING_OKAY;

10634 10635 10636 10637
    VIR_EXCLUSIVE_FLAGS_GOTO(VIR_DOMAIN_AFFECT_LIVE,
                             VIR_DOMAIN_AFFECT_CONFIG,
                             error);

10638 10639 10640 10641 10642 10643 10644 10645 10646 10647 10648 10649 10650 10651 10652 10653 10654 10655 10656 10657 10658 10659 10660 10661 10662 10663 10664 10665 10666 10667 10668 10669 10670 10671 10672 10673 10674 10675 10676 10677 10678 10679 10680 10681 10682 10683 10684 10685 10686 10687 10688 10689 10690 10691 10692 10693 10694 10695 10696 10697 10698 10699 10700 10701 10702 10703 10704 10705 10706 10707 10708 10709
    conn = dom->conn;

    if (conn->driver->domainGetBlockIoTune) {
        int ret;
        ret = conn->driver->domainGetBlockIoTune(dom, disk, params, nparams, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainGetCPUStats:
 * @domain: domain to query
 * @params: array to populate on output
 * @nparams: number of parameters per cpu
 * @start_cpu: which cpu to start with, or -1 for summary
 * @ncpus: how many cpus to query
 * @flags: bitwise-OR of virTypedParameterFlags
 *
 * Get statistics relating to CPU usage attributable to a single
 * domain (in contrast to the statistics returned by
 * virNodeGetCPUStats() for all processes on the host).  @dom
 * must be running (an inactive domain has no attributable cpu
 * usage).  On input, @params must contain at least @nparams * @ncpus
 * entries, allocated by the caller.
 *
 * If @start_cpu is -1, then @ncpus must be 1, and the returned
 * results reflect the statistics attributable to the entire
 * domain (such as user and system time for the process as a
 * whole).  Otherwise, @start_cpu represents which cpu to start
 * with, and @ncpus represents how many consecutive processors to
 * query, with statistics attributable per processor (such as
 * per-cpu usage).  If @ncpus is larger than the number of cpus
 * available to query, then the trailing part of the array will
 * be unpopulated.
 *
 * The remote driver imposes a limit of 128 @ncpus and 16 @nparams;
 * the number of parameters per cpu should not exceed 16, but if you
 * have a host with more than 128 CPUs, your program should split
 * the request into multiple calls.
 *
 * As special cases, if @params is NULL and @nparams is 0 and
 * @ncpus is 1, and the return value will be how many
 * statistics are available for the given @start_cpu.  This number
 * may be different for @start_cpu of -1 than for any non-negative
 * value, but will be the same for all non-negative @start_cpu.
 * Likewise, if @params is NULL and @nparams is 0 and @ncpus is 0,
 * the number of cpus available to query is returned.  From the
 * host perspective, this would typically match the cpus member
 * of virNodeGetInfo(), but might be less due to host cpu hotplug.
 *
 * For now, @flags is unused, and the statistics all relate to the
 * usage from the host perspective.  It is possible that a future
 * version will support a flag that queries the cpu usage from the
 * guest's perspective, where the maximum cpu to query would be
 * related to virDomainGetVcpusFlags() rather than virNodeGetInfo().
 * An individual guest vcpu cannot be reliably mapped back to a
 * specific host cpu unless a single-processor vcpu pinning was used,
 * but when @start_cpu is -1, any difference in usage between a host
 * and guest perspective would serve as a measure of hypervisor overhead.
 *
 * Typical use sequence is below.
 *
 * getting total stats: set start_cpu as -1, ncpus 1
10710 10711 10712 10713
 *
 *   virDomainGetCPUStats(dom, NULL, 0, -1, 1, 0); // nparams
 *   params = calloc(nparams, sizeof(virTypedParameter))
 *   virDomainGetCPUStats(dom, params, nparams, -1, 1, 0); // total stats.
10714 10715
 *
 * getting per-cpu stats:
10716 10717 10718 10719 10720
 *
 *   virDomainGetCPUStats(dom, NULL, 0, 0, 0, 0); // ncpus
 *   virDomainGetCPUStats(dom, NULL, 0, 0, 1, 0); // nparams
 *   params = calloc(ncpus * nparams, sizeof(virTypedParameter));
 *   virDomainGetCPUStats(dom, params, nparams, 0, ncpus, 0); // per-cpu stats
10721 10722 10723 10724 10725 10726 10727 10728 10729 10730 10731 10732 10733 10734 10735 10736 10737 10738 10739 10740 10741 10742 10743 10744 10745 10746 10747 10748 10749 10750 10751 10752 10753 10754 10755 10756 10757 10758
 *
 * Returns -1 on failure, or the number of statistics that were
 * populated per cpu on success (this will be less than the total
 * number of populated @params, unless @ncpus was 1; and may be
 * less than @nparams).  The populated parameters start at each
 * stride of @nparams, which means the results may be discontiguous;
 * any unpopulated parameters will be zeroed on success (this includes
 * skipped elements if @nparams is too large, and tail elements if
 * @ncpus is too large).  The caller is responsible for freeing any
 * returned string parameters.
 */
int
virDomainGetCPUStats(virDomainPtr domain,
                     virTypedParameterPtr params,
                     unsigned int nparams,
                     int start_cpu,
                     unsigned int ncpus,
                     unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain,
                     "params=%p, nparams=%d, start_cpu=%d, ncpus=%u, flags=%x",
                     params, nparams, start_cpu, ncpus, flags);
    virResetLastError();

    virCheckDomainReturn(domain, -1);
    conn = domain->conn;

    /* Special cases:
     * start_cpu must be non-negative, or else -1
     * if start_cpu is -1, ncpus must be 1
     * params == NULL must match nparams == 0
     * ncpus must be non-zero unless params == NULL
     * nparams * ncpus must not overflow (RPC may restrict it even more)
     */
    if (start_cpu == -1) {
        if (ncpus != 1) {
10759 10760
            virReportInvalidArg(start_cpu, "%s",
                                _("ncpus must be 1 when start_cpu is -1"));
10761 10762 10763 10764 10765 10766 10767 10768 10769 10770 10771 10772 10773 10774 10775 10776 10777 10778 10779 10780 10781 10782 10783 10784 10785 10786 10787 10788 10789 10790 10791 10792 10793 10794 10795 10796 10797 10798 10799 10800 10801 10802 10803 10804 10805 10806 10807 10808 10809 10810 10811 10812 10813 10814 10815 10816 10817 10818 10819 10820 10821 10822 10823 10824 10825 10826 10827 10828 10829 10830 10831 10832 10833 10834 10835 10836 10837 10838 10839 10840 10841 10842 10843 10844 10845 10846 10847 10848 10849 10850 10851 10852 10853 10854 10855 10856 10857 10858 10859 10860 10861 10862 10863 10864 10865 10866 10867 10868 10869 10870 10871 10872 10873 10874 10875 10876 10877 10878 10879 10880 10881 10882 10883 10884 10885 10886 10887 10888 10889 10890 10891 10892 10893 10894 10895 10896 10897 10898 10899 10900 10901 10902 10903 10904 10905 10906 10907 10908 10909 10910 10911 10912 10913 10914 10915 10916 10917 10918 10919 10920 10921 10922 10923 10924 10925 10926 10927 10928 10929 10930 10931 10932 10933 10934 10935 10936 10937 10938 10939 10940 10941 10942 10943 10944 10945 10946 10947 10948 10949 10950 10951 10952 10953 10954 10955 10956 10957 10958 10959 10960 10961 10962 10963 10964 10965 10966 10967 10968 10969 10970 10971 10972 10973 10974 10975 10976 10977 10978 10979 10980 10981 10982 10983 10984 10985 10986 10987 10988 10989 10990 10991 10992 10993 10994 10995 10996 10997 10998 10999 11000 11001 11002 11003 11004 11005 11006 11007 11008 11009 11010 11011 11012 11013 11014 11015 11016 11017 11018 11019 11020 11021 11022 11023 11024 11025 11026 11027 11028 11029 11030 11031 11032 11033 11034 11035 11036 11037 11038 11039 11040 11041 11042 11043 11044 11045 11046 11047 11048 11049 11050 11051 11052 11053 11054 11055 11056 11057 11058 11059 11060 11061 11062 11063 11064 11065 11066 11067 11068 11069 11070 11071
            goto error;
        }
    } else {
        virCheckNonNegativeArgGoto(start_cpu, error);
    }
    if (nparams)
        virCheckNonNullArgGoto(params, error);
    else
        virCheckNullArgGoto(params, error);
    if (ncpus == 0)
        virCheckNullArgGoto(params, error);

    if (nparams && ncpus > UINT_MAX / nparams) {
        virReportError(VIR_ERR_OVERFLOW, _("input too large: %u * %u"),
                       nparams, ncpus);
        goto error;
    }
    if (VIR_DRV_SUPPORTS_FEATURE(domain->conn->driver, domain->conn,
                                 VIR_DRV_FEATURE_TYPED_PARAM_STRING))
        flags |= VIR_TYPED_PARAM_STRING_OKAY;

    if (conn->driver->domainGetCPUStats) {
        int ret;

        ret = conn->driver->domainGetCPUStats(domain, params, nparams,
                                              start_cpu, ncpus, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}


/**
 * virDomainGetDiskErrors:
 * @dom: a domain object
 * @errors: array to populate on output
 * @maxerrors: size of @errors array
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * The function populates @errors array with all disks that encountered an
 * I/O error.  Disks with no error will not be returned in the @errors array.
 * Each disk is identified by its target (the dev attribute of target
 * subelement in domain XML), such as "vda", and accompanied with the error
 * that was seen on it.  The caller is also responsible for calling free()
 * on each disk name returned.
 *
 * In a special case when @errors is NULL and @maxerrors is 0, the function
 * returns preferred size of @errors that the caller should use to get all
 * disk errors.
 *
 * Since calling virDomainGetDiskErrors(dom, NULL, 0, 0) to get preferred size
 * of @errors array and getting the errors are two separate operations, new
 * disks may be hotplugged to the domain and new errors may be encountered
 * between the two calls.  Thus, this function may not return all disk errors
 * because the supplied array is not large enough.  Such errors may, however,
 * be detected by listening to domain events.
 *
 * Returns number of disks with errors filled in the @errors array or -1 on
 * error.
 */
int
virDomainGetDiskErrors(virDomainPtr dom,
                       virDomainDiskErrorPtr errors,
                       unsigned int maxerrors,
                       unsigned int flags)
{
    VIR_DOMAIN_DEBUG(dom, "errors=%p, maxerrors=%u, flags=%x",
                     errors, maxerrors, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);

    if (maxerrors)
        virCheckNonNullArgGoto(errors, error);
    else
        virCheckNullArgGoto(errors, error);

    if (dom->conn->driver->domainGetDiskErrors) {
        int ret = dom->conn->driver->domainGetDiskErrors(dom, errors,
                                                         maxerrors, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainGetHostname:
 * @domain: a domain object
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Get the hostname for that domain.
 *
 * Dependent on hypervisor used, this may require a guest agent to be
 * available.
 *
 * Returns the hostname which must be freed by the caller, or
 * NULL if there was an error.
 */
char *
virDomainGetHostname(virDomainPtr domain, unsigned int flags)
{
    virConnectPtr conn;

    VIR_DOMAIN_DEBUG(domain, "flags=%x", flags);

    virResetLastError();

    virCheckDomainReturn(domain, NULL);
    conn = domain->conn;

    if (conn->driver->domainGetHostname) {
        char *ret;
        ret = conn->driver->domainGetHostname(domain, flags);
        if (!ret)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return NULL;
}


/**
 * virDomainFSTrim:
 * @dom: a domain object
 * @mountPoint: which mount point to trim
 * @minimum: Minimum contiguous free range to discard in bytes
 * @flags: extra flags, not used yet, so callers should always pass 0
 *
 * Calls FITRIM within the guest (hence guest agent may be
 * required depending on hypervisor used). Either call it on each
 * mounted filesystem (@mountPoint is NULL) or just on specified
 * @mountPoint. @minimum hints that free ranges smaller than this
 * may be ignored (this is a hint and the guest may not respect
 * it).  By increasing this value, the fstrim operation will
 * complete more quickly for filesystems with badly fragmented
 * free space, although not all blocks will be discarded.
 * If @minimum is not zero, the command may fail.
 *
 * Returns 0 on success, -1 otherwise.
 */
int
virDomainFSTrim(virDomainPtr dom,
                const char *mountPoint,
                unsigned long long minimum,
                unsigned int flags)
{
    VIR_DOMAIN_DEBUG(dom, "mountPoint=%s, minimum=%llu, flags=%x",
                     mountPoint, minimum, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    virCheckReadOnlyGoto(dom->conn->flags, error);

    if (dom->conn->driver->domainFSTrim) {
        int ret = dom->conn->driver->domainFSTrim(dom, mountPoint,
                                                  minimum, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}

/**
 * virDomainFSFreeze:
 * @dom: a domain object
 * @mountpoints: list of mount points to be frozen
 * @nmountpoints: the number of mount points specified in @mountpoints
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Freeze specified filesystems within the guest (hence guest agent
 * may be required depending on hypervisor used). If @mountpoints is NULL and
 * @nmountpoints is 0, every mounted filesystem on the guest is frozen.
 * In some environments (e.g. QEMU guest with guest agent which doesn't
 * support mountpoints argument), @mountpoints may need to be NULL.
 *
 * Returns the number of frozen filesystems on success, -1 otherwise.
 */
int
virDomainFSFreeze(virDomainPtr dom,
                  const char **mountpoints,
                  unsigned int nmountpoints,
                  unsigned int flags)
{
    VIR_DOMAIN_DEBUG(dom, "mountpoints=%p, nmountpoints=%d, flags=%x",
                     mountpoints, nmountpoints, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    virCheckReadOnlyGoto(dom->conn->flags, error);
    if (nmountpoints)
        virCheckNonNullArgGoto(mountpoints, error);
    else
        virCheckNullArgGoto(mountpoints, error);

    if (dom->conn->driver->domainFSFreeze) {
        int ret = dom->conn->driver->domainFSFreeze(
            dom, mountpoints, nmountpoints, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}

/**
 * virDomainFSThaw:
 * @dom: a domain object
 * @mountpoints: list of mount points to be thawed
 * @nmountpoints: the number of mount points specified in @mountpoints
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Thaw specified filesystems within the guest. If @mountpoints is NULL and
 * @nmountpoints is 0, every mounted filesystem on the guest is thawed.
 * In some drivers (e.g. QEMU driver), @mountpoints may need to be NULL.
 *
 * Returns the number of thawed filesystems on success, -1 otherwise.
 */
int
virDomainFSThaw(virDomainPtr dom,
                const char **mountpoints,
                unsigned int nmountpoints,
                unsigned int flags)
{
    VIR_DOMAIN_DEBUG(dom, "flags=%x", flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    virCheckReadOnlyGoto(dom->conn->flags, error);
    if (nmountpoints)
        virCheckNonNullArgGoto(mountpoints, error);
    else
        virCheckNullArgGoto(mountpoints, error);

    if (dom->conn->driver->domainFSThaw) {
        int ret = dom->conn->driver->domainFSThaw(
            dom, mountpoints, nmountpoints, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}

/**
 * virDomainGetTime:
 * @dom: a domain object
 * @seconds: domain's time in seconds
 * @nseconds: the nanoscond part of @seconds
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Extract information about guest time and store it into
 * @seconds and @nseconds. The @seconds represents the number of
 * seconds since the UNIX Epoch of 1970-01-01 00:00:00 in UTC.
 *
 * Please note that some hypervisors may require guest agent to
 * be configured and running in order to run this API.
 *
 * Returns 0 on success, -1 otherwise.
 */
int
virDomainGetTime(virDomainPtr dom,
                 long long *seconds,
                 unsigned int *nseconds,
                 unsigned int flags)
{
    VIR_DOMAIN_DEBUG(dom, "seconds=%p, nseconds=%p, flags=%x",
                     seconds, nseconds, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
11072
    virCheckReadOnlyGoto(dom->conn->flags, error);
11073 11074 11075 11076 11077 11078 11079 11080 11081 11082 11083 11084 11085 11086 11087 11088 11089 11090 11091 11092 11093 11094 11095 11096 11097 11098 11099 11100 11101 11102 11103 11104 11105 11106 11107 11108 11109 11110 11111 11112 11113 11114 11115 11116 11117 11118 11119 11120 11121 11122 11123 11124 11125 11126 11127 11128 11129 11130 11131 11132 11133 11134 11135 11136 11137 11138 11139

    if (dom->conn->driver->domainGetTime) {
        int ret = dom->conn->driver->domainGetTime(dom, seconds,
                                                   nseconds, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}

/**
 * virDomainSetTime:
 * @dom: a domain object
 * @seconds: time to set
 * @nseconds: the nanosecond part of @seconds
 * @flags: bitwise-OR of virDomainSetTimeFlags
 *
 * When a domain is suspended or restored from a file the
 * domain's OS has no idea that there was a big gap in the time.
 * Depending on how long the gap was, NTP might not be able to
 * resynchronize the guest.
 *
 * This API tries to set guest time to the given value. The time
 * to set (@seconds and @nseconds) should be in seconds relative
 * to the Epoch of 1970-01-01 00:00:00 in UTC.
 *
 * Please note that some hypervisors may require guest agent to
 * be configured and running in order to be able to run this API.
 *
 * Returns 0 on success, -1 otherwise.
 */
int
virDomainSetTime(virDomainPtr dom,
                 long long seconds,
                 unsigned int nseconds,
                 unsigned int flags)
{
    VIR_DOMAIN_DEBUG(dom, "seconds=%lld, nseconds=%u, flags=%x",
                     seconds, nseconds, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    virCheckReadOnlyGoto(dom->conn->flags, error);

    if (dom->conn->driver->domainSetTime) {
        int ret = dom->conn->driver->domainSetTime(dom, seconds,
                                                   nseconds, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


11140 11141 11142 11143 11144 11145 11146 11147 11148 11149 11150 11151 11152 11153 11154 11155 11156 11157 11158 11159 11160 11161 11162 11163 11164 11165 11166 11167 11168 11169 11170 11171 11172 11173 11174 11175 11176 11177 11178 11179 11180 11181 11182 11183 11184 11185 11186
/**
 * virDomainSetUserPassword:
 * @dom: a domain object
 * @user: the username that will get a new password
 * @password: the password to set
 * @flags: bitwise-OR of virDomainSetUserPasswordFlags
 *
 * Sets the @user password to the value specified by @password.
 * If @flags contain VIR_DOMAIN_PASSWORD_ENCRYPTED, the password
 * is assumed to be encrypted by the method required by the guest OS.
 *
 * Please note that some hypervisors may require guest agent to
 * be configured and running in order to be able to run this API.
 *
 * Returns 0 on success, -1 otherwise.
 */
int
virDomainSetUserPassword(virDomainPtr dom,
                         const char *user,
                         const char *password,
                         unsigned int flags)
{
    VIR_DOMAIN_DEBUG(dom, "user=%s, password=%s, flags=%x",
                     NULLSTR(user), NULLSTR(password), flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    virCheckReadOnlyGoto(dom->conn->flags, error);
    virCheckNonNullArgGoto(user, error);
    virCheckNonNullArgGoto(password, error);

    if (dom->conn->driver->domainSetUserPassword) {
        int ret = dom->conn->driver->domainSetUserPassword(dom, user, password,
                                                           flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}

11187 11188 11189 11190 11191 11192 11193 11194 11195 11196 11197 11198 11199 11200 11201 11202 11203 11204 11205 11206 11207 11208 11209 11210 11211 11212 11213 11214 11215 11216 11217 11218 11219 11220 11221 11222 11223 11224 11225 11226 11227 11228 11229 11230 11231 11232 11233 11234 11235 11236 11237 11238 11239 11240 11241 11242 11243 11244 11245 11246 11247 11248 11249 11250 11251 11252 11253 11254 11255 11256 11257 11258 11259 11260 11261

/**
 * virConnectGetDomainCapabilities:
 * @conn: pointer to the hypervisor connection
 * @emulatorbin: path to emulator
 * @arch: domain architecture
 * @machine: machine type
 * @virttype: virtualization type
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Prior creating a domain (for instance via virDomainCreateXML
 * or virDomainDefineXML) it may be suitable to know what the
 * underlying emulator and/or libvirt is capable of. For
 * instance, if host, libvirt and qemu is capable of VFIO
 * passthrough and so on.
 *
 * Returns NULL in case of error or an XML string
 * defining the capabilities.
 */
char *
virConnectGetDomainCapabilities(virConnectPtr conn,
                                const char *emulatorbin,
                                const char *arch,
                                const char *machine,
                                const char *virttype,
                                unsigned int flags)
{
    VIR_DEBUG("conn=%p, emulatorbin=%s, arch=%s, "
              "machine=%s, virttype=%s, flags=%x",
              conn, NULLSTR(emulatorbin), NULLSTR(arch),
              NULLSTR(machine), NULLSTR(virttype), flags);

    virResetLastError();

    virCheckConnectReturn(conn, NULL);

    if (conn->driver->connectGetDomainCapabilities) {
        char *ret;
        ret = conn->driver->connectGetDomainCapabilities(conn, emulatorbin,
                                                         arch, machine,
                                                         virttype, flags);
        if (!ret)
            goto error;
        VIR_DEBUG("conn=%p, ret=%s", conn, ret);
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(conn);
    return NULL;
}


/**
 * virConnectGetAllDomainStats:
 * @conn: pointer to the hypervisor connection
 * @stats: stats to return, binary-OR of virDomainStatsTypes
 * @retStats: Pointer that will be filled with the array of returned stats
 * @flags: extra flags; binary-OR of virConnectGetAllDomainStatsFlags
 *
 * Query statistics for all domains on a given connection.
 *
 * Report statistics of various parameters for a running VM according to @stats
 * field. The statistics are returned as an array of structures for each queried
 * domain. The structure contains an array of typed parameters containing the
 * individual statistics. The typed parameter name for each statistic field
 * consists of a dot-separated string containing name of the requested group
 * followed by a group specific description of the statistic value.
 *
 * The statistic groups are enabled using the @stats parameter which is a
 * binary-OR of enum virDomainStatsTypes. The following groups are available
 * (although not necessarily implemented for each hypervisor):
 *
11262 11263 11264 11265 11266 11267 11268 11269 11270 11271 11272 11273 11274 11275 11276 11277 11278 11279 11280 11281 11282 11283 11284 11285 11286 11287 11288 11289 11290 11291 11292 11293 11294 11295 11296 11297 11298 11299 11300 11301 11302 11303 11304 11305 11306 11307 11308 11309 11310 11311 11312 11313 11314 11315 11316 11317 11318 11319 11320 11321 11322 11323 11324 11325 11326 11327 11328 11329 11330 11331 11332 11333 11334 11335 11336 11337 11338 11339 11340 11341 11342 11343 11344 11345 11346 11347 11348 11349 11350 11351 11352 11353 11354 11355 11356 11357 11358 11359
 * VIR_DOMAIN_STATS_STATE:
 *     Return domain state and reason for entering that state. The typed
 *     parameter keys are in this format:
 *
 *     "state.state" - state of the VM, returned as int from virDomainState enum
 *     "state.reason" - reason for entering given state, returned as int from
 *                      virDomain*Reason enum corresponding to given state.
 *
 * VIR_DOMAIN_STATS_CPU_TOTAL:
 *     Return CPU statistics and usage information. The typed parameter keys
 *     are in this format:
 *
 *     "cpu.time" - total cpu time spent for this domain in nanoseconds
 *                  as unsigned long long.
 *     "cpu.user" - user cpu time spent in nanoseconds as unsigned long long.
 *     "cpu.system" - system cpu time spent in nanoseconds as unsigned long
 *                    long.
 *
 * VIR_DOMAIN_STATS_BALLOON:
 *     Return memory balloon device information.
 *     The typed parameter keys are in this format:
 *
 *     "balloon.current" - the memory in kiB currently used
 *                         as unsigned long long.
 *     "balloon.maximum" - the maximum memory in kiB allowed
 *                         as unsigned long long.
 *
 * VIR_DOMAIN_STATS_VCPU:
 *     Return virtual CPU statistics.
 *     Due to VCPU hotplug, the vcpu.<num>.* array could be sparse.
 *     The actual size of the array corresponds to "vcpu.current".
 *     The array size will never exceed "vcpu.maximum".
 *     The typed parameter keys are in this format:
 *
 *     "vcpu.current" - current number of online virtual CPUs as unsigned int.
 *     "vcpu.maximum" - maximum number of online virtual CPUs as unsigned int.
 *     "vcpu.<num>.state" - state of the virtual CPU <num>, as int
 *                          from virVcpuState enum.
 *     "vcpu.<num>.time" - virtual cpu time spent by virtual CPU <num>
 *                         as unsigned long long.
 *
 * VIR_DOMAIN_STATS_INTERFACE:
 *     Return network interface statistics.
 *     The typed parameter keys are in this format:
 *
 *     "net.count" - number of network interfaces on this domain
 *                   as unsigned int.
 *     "net.<num>.name" - name of the interface <num> as string.
 *     "net.<num>.rx.bytes" - bytes received as unsigned long long.
 *     "net.<num>.rx.pkts" - packets received as unsigned long long.
 *     "net.<num>.rx.errs" - receive errors as unsigned long long.
 *     "net.<num>.rx.drop" - receive packets dropped as unsigned long long.
 *     "net.<num>.tx.bytes" - bytes transmitted as unsigned long long.
 *     "net.<num>.tx.pkts" - packets transmitted as unsigned long long.
 *     "net.<num>.tx.errs" - transmission errors as unsigned long long.
 *     "net.<num>.tx.drop" - transmit packets dropped as unsigned long long.
 *
 * VIR_DOMAIN_STATS_BLOCK:
 *     Return block devices statistics.  By default,
 *     this information is limited to the active layer of each <disk> of the
 *     domain (where block.count is equal to the number of disks), but adding
 *     VIR_CONNECT_GET_ALL_DOMAINS_STATS_BACKING to @flags will expand the
 *     array to cover backing chains (block.count corresponds to the number
 *     of host resources used together to provide the guest disks).
 *     The typed parameter keys are in this format:
 *
 *     "block.count" - number of block devices in the subsequent list,
 *                     as unsigned int.
 *     "block.<num>.name" - name of the block device <num> as string.
 *                          matches the target name (vda/sda/hda) of the
 *                          block device.  If the backing chain is listed,
 *                          this name is the same for all host resources tied
 *                          to the same guest device.
 *     "block.<num>.backingIndex" - unsigned int giving the <backingStore>
 *                                   index, only used when backing images
 *                                   are listed.
 *     "block.<num>.path" - string describing the source of block device <num>,
 *                          if it is a file or block device (omitted for network
 *                          sources and drives with no media inserted).
 *     "block.<num>.rd.reqs" - number of read requests as unsigned long long.
 *     "block.<num>.rd.bytes" - number of read bytes as unsigned long long.
 *     "block.<num>.rd.times" - total time (ns) spent on reads as
 *                              unsigned long long.
 *     "block.<num>.wr.reqs" - number of write requests as unsigned long long.
 *     "block.<num>.wr.bytes" - number of written bytes as unsigned long long.
 *     "block.<num>.wr.times" - total time (ns) spent on writes as
 *                              unsigned long long.
 *     "block.<num>.fl.reqs" - total flush requests as unsigned long long.
 *     "block.<num>.fl.times" - total time (ns) spent on cache flushing as
 *                              unsigned long long.
 *     "block.<num>.errors" - Xen only: the 'oo_req' value as
 *                            unsigned long long.
 *     "block.<num>.allocation" - offset of the highest written sector
 *                                as unsigned long long.
 *     "block.<num>.capacity" - logical size in bytes of the block device
 *                              backing image as unsigned long long.
 *     "block.<num>.physical" - physical size in bytes of the container of the
 *                              backing image as unsigned long long.
11360 11361 11362
 *     "block.<num>.threshold" - current threshold for delivering the
 *                               VIR_DOMAIN_EVENT_ID_BLOCK_THRESHOLD
 *                               event in bytes. See virDomainSetBlockThreshold.
11363 11364 11365 11366 11367 11368 11369 11370 11371 11372 11373 11374 11375 11376 11377
 *
 * VIR_DOMAIN_STATS_PERF:
 *     Return perf event statistics.
 *     The typed parameter keys are in this format:
 *
 *     "perf.cmt" - the usage of l3 cache (bytes) by applications running on
 *                  the platform as unsigned long long. It is produced by cmt
 *                  perf event.
 *     "perf.mbmt" - the total system bandwidth (bytes/s) from one level of
 *                   cache to another as unsigned long long. It is produced
 *                   by mbmt perf event.
 *     "perf.mbml" - the amount of data (bytes/s) sent through the memory
 *                   controller on the socket as unsigned long long. It is
 *                   produced by mbml perf event.
 *     "perf.cache_misses" - the count of cache misses as unsigned long long.
Q
Qiaowei Ren 已提交
11378
 *                           It is produced by cache_misses perf event.
11379 11380 11381
 *     "perf.cache_references" - the count of cache hits as unsigned long long.
 *                               It is produced by cache_references perf event.
 *     "perf.instructions" - The count of instructions as unsigned long long.
Q
Qiaowei Ren 已提交
11382
 *                           It is produced by instructions perf event.
11383 11384 11385
 *     "perf.cpu_cycles" - The count of cpu cycles (total/elapsed) as an
 *                         unsigned long long. It is produced by cpu_cycles
 *                         perf event.
11386 11387 11388
 *     "perf.branch_instructions" - The count of branch instructions as
 *                                  unsigned long long. It is produced by
 *                                  branch_instructions perf event.
11389 11390
 *     "perf.branch_misses" - The count of branch misses as unsigned long
 *                            long. It is produced by branch_misses perf event.
11391 11392
 *     "perf.bus_cycles" - The count of bus cycles as unsigned long
 *                         long. It is produced by bus_cycles perf event.
11393 11394 11395 11396 11397
 *     "perf.stalled_cycles_frontend" - The count of stalled cpu cycles in the
 *                                      frontend of the instruction processor
 *                                      pipeline as unsigned long long. It is
 *                                      produced by stalled_cycles_frontend
 *                                      perf event.
11398 11399 11400 11401 11402
 *     "perf.stalled_cycles_backend"  - The count of stalled cpu cycles in the
 *                                      backend of the instruction processor
 *                                      pipeline as unsigned long long. It is
 *                                      produced by stalled_cycles_backend
 *                                      perf event.
11403 11404 11405 11406
 *     "perf.ref_cpu_cycles" - The count of total cpu cycles not affected by
 *                             CPU frequency scaling by applications running
 *                             as unsigned long long. It is produced by the
 *                             ref_cpu_cycles perf event.
11407 11408
 *     "perf.cpu_clock" - The count of cpu clock time as unsigned long long.
 *                        It is produced by the cpu_clock perf event.
11409 11410
 *     "perf.task_clock" - The count of task clock time as unsigned long long.
 *                         It is produced by the task_clock perf event.
11411 11412
 *     "perf.page_faults" - The count of page faults as unsigned long long.
 *                          It is produced by the page_faults perf event
11413 11414 11415
 *     "perf.context_switches" - The count of context switches as unsigned long
 *                               long. It is produced by the context_switches
 *                               perf event.
11416 11417 11418 11419
 *     "perf.cpu_migrations" - The count of cpu migrations, from one logical
 *                             processor to another, as unsigned long
 *                             long. It is produced by the cpu_migrations
 *                             perf event.
11420 11421 11422
 *     "perf.page_faults_min" - The count of minor page faults as unsigned
 *                              long long. It is produced by the
 *                              page_faults_min perf event.
11423 11424 11425
 *     "perf.page_faults_maj" - The count of major page faults as unsigned
 *                              long long. It is produced by the
 *                              page_faults_maj perf event.
11426 11427 11428
 *     "perf.alignment_faults" - The count of alignment faults as unsigned
 *                               long long. It is produced by the
 *                               alignment_faults perf event
11429 11430 11431
 *     "perf.emulation_faults" - The count of emulation faults as unsigned
 *                               long long. It is produced by the
 *                               emulation_faults perf event
11432
 *
11433 11434 11435 11436 11437 11438 11439 11440 11441 11442
 * Note that entire stats groups or individual stat fields may be missing from
 * the output in case they are not supported by the given hypervisor, are not
 * applicable for the current state of the guest domain, or their retrieval
 * was not successful.
 *
 * Using 0 for @stats returns all stats groups supported by the given
 * hypervisor.
 *
 * Specifying VIR_CONNECT_GET_ALL_DOMAINS_STATS_ENFORCE_STATS as @flags makes
 * the function return error in case some of the stat types in @stats were
E
Eric Blake 已提交
11443 11444 11445 11446 11447
 * not recognized by the daemon.  However, even with this flag, a hypervisor
 * may omit individual fields within a known group if the information is not
 * available; as an extreme example, a supported group may produce zero
 * fields for offline domains if the statistics are meaningful only for a
 * running domain.
11448 11449 11450 11451 11452 11453 11454 11455 11456 11457 11458 11459 11460 11461 11462 11463 11464 11465 11466 11467 11468 11469 11470 11471 11472 11473 11474 11475 11476 11477 11478 11479 11480 11481 11482 11483 11484 11485 11486 11487 11488 11489 11490 11491 11492 11493 11494 11495 11496 11497 11498 11499 11500 11501 11502 11503 11504 11505 11506 11507 11508 11509 11510 11511 11512 11513 11514 11515 11516 11517 11518 11519 11520 11521 11522 11523 11524 11525 11526
 *
 * Similarly to virConnectListAllDomains, @flags can contain various flags to
 * filter the list of domains to provide stats for.
 *
 * VIR_CONNECT_GET_ALL_DOMAINS_STATS_ACTIVE selects online domains while
 * VIR_CONNECT_GET_ALL_DOMAINS_STATS_INACTIVE selects offline ones.
 *
 * VIR_CONNECT_GET_ALL_DOMAINS_STATS_PERSISTENT and
 * VIR_CONNECT_GET_ALL_DOMAINS_STATS_TRANSIENT allow to filter the list
 * according to their persistence.
 *
 * To filter the list of VMs by domain state @flags can contain
 * VIR_CONNECT_GET_ALL_DOMAINS_STATS_RUNNING,
 * VIR_CONNECT_GET_ALL_DOMAINS_STATS_PAUSED,
 * VIR_CONNECT_GET_ALL_DOMAINS_STATS_SHUTOFF and/or
 * VIR_CONNECT_GET_ALL_DOMAINS_STATS_OTHER for all other states.
 *
 * Returns the count of returned statistics structures on success, -1 on error.
 * The requested data are returned in the @retStats parameter. The returned
 * array should be freed by the caller. See virDomainStatsRecordListFree.
 */
int
virConnectGetAllDomainStats(virConnectPtr conn,
                            unsigned int stats,
                            virDomainStatsRecordPtr **retStats,
                            unsigned int flags)
{
    int ret = -1;

    VIR_DEBUG("conn=%p, stats=0x%x, retStats=%p, flags=0x%x",
              conn, stats, retStats, flags);

    virResetLastError();

    virCheckConnectReturn(conn, -1);
    virCheckNonNullArgGoto(retStats, cleanup);

    if (!conn->driver->connectGetAllDomainStats) {
        virReportUnsupportedError();
        goto cleanup;
    }

    ret = conn->driver->connectGetAllDomainStats(conn, NULL, 0, stats,
                                                 retStats, flags);

 cleanup:
    if (ret < 0)
        virDispatchError(conn);

    return ret;
}


/**
 * virDomainListGetStats:
 * @doms: NULL terminated array of domains
 * @stats: stats to return, binary-OR of virDomainStatsTypes
 * @retStats: Pointer that will be filled with the array of returned stats
 * @flags: extra flags; binary-OR of virConnectGetAllDomainStatsFlags
 *
 * Query statistics for domains provided by @doms. Note that all domains in
 * @doms must share the same connection.
 *
 * Report statistics of various parameters for a running VM according to @stats
 * field. The statistics are returned as an array of structures for each queried
 * domain. The structure contains an array of typed parameters containing the
 * individual statistics. The typed parameter name for each statistic field
 * consists of a dot-separated string containing name of the requested group
 * followed by a group specific description of the statistic value.
 *
 * The statistic groups are enabled using the @stats parameter which is a
 * binary-OR of enum virDomainStatsTypes. The stats groups are documented
 * in virConnectGetAllDomainStats.
 *
 * Using 0 for @stats returns all stats groups supported by the given
 * hypervisor.
 *
 * Specifying VIR_CONNECT_GET_ALL_DOMAINS_STATS_ENFORCE_STATS as @flags makes
 * the function return error in case some of the stat types in @stats were
E
Eric Blake 已提交
11527 11528 11529 11530 11531
 * not recognized by the daemon.  However, even with this flag, a hypervisor
 * may omit individual fields within a known group if the information is not
 * available; as an extreme example, a supported group may produce zero
 * fields for offline domains if the statistics are meaningful only for a
 * running domain.
11532
 *
E
Eric Blake 已提交
11533
 * Note that any of the domain list filtering flags in @flags may be rejected
11534 11535 11536 11537 11538 11539 11540 11541 11542 11543 11544 11545 11546 11547 11548 11549 11550 11551 11552 11553 11554 11555 11556 11557 11558 11559 11560 11561 11562 11563 11564 11565 11566 11567 11568 11569 11570 11571 11572 11573 11574 11575 11576 11577 11578 11579 11580 11581
 * by this function.
 *
 * Returns the count of returned statistics structures on success, -1 on error.
 * The requested data are returned in the @retStats parameter. The returned
 * array should be freed by the caller. See virDomainStatsRecordListFree.
 * Note that the count of returned stats may be less than the domain count
 * provided via @doms.
 */
int
virDomainListGetStats(virDomainPtr *doms,
                      unsigned int stats,
                      virDomainStatsRecordPtr **retStats,
                      unsigned int flags)
{
    virConnectPtr conn = NULL;
    virDomainPtr *nextdom = doms;
    unsigned int ndoms = 0;
    int ret = -1;

    VIR_DEBUG("doms=%p, stats=0x%x, retStats=%p, flags=0x%x",
              doms, stats, retStats, flags);

    virResetLastError();

    virCheckNonNullArgGoto(doms, cleanup);
    virCheckNonNullArgGoto(retStats, cleanup);

    if (!*doms) {
        virReportError(VIR_ERR_INVALID_ARG,
                       _("doms array in %s must contain at least one domain"),
                       __FUNCTION__);
        goto cleanup;
    }

    conn = doms[0]->conn;
    virCheckConnectReturn(conn, -1);

    if (!conn->driver->connectGetAllDomainStats) {
        virReportUnsupportedError();
        goto cleanup;
    }

    while (*nextdom) {
        virDomainPtr dom = *nextdom;

        virCheckDomainGoto(dom, cleanup);

        if (dom->conn != conn) {
11582
            virReportError(VIR_ERR_INVALID_ARG, "%s",
11583
                           _("domains in 'doms' array must belong to a "
11584
                             "single connection"));
11585 11586 11587 11588 11589 11590 11591 11592 11593 11594 11595 11596 11597 11598 11599 11600 11601 11602 11603 11604 11605 11606 11607 11608 11609 11610 11611 11612 11613 11614 11615 11616 11617 11618 11619 11620 11621 11622 11623 11624
            goto cleanup;
        }

        ndoms++;
        nextdom++;
    }

    ret = conn->driver->connectGetAllDomainStats(conn, doms, ndoms,
                                                 stats, retStats, flags);

 cleanup:
    if (ret < 0)
        virDispatchError(conn);
    return ret;
}


/**
 * virDomainStatsRecordListFree:
 * @stats: NULL terminated array of virDomainStatsRecords to free
 *
 * Convenience function to free a list of domain stats returned by
 * virDomainListGetStats and virConnectGetAllDomainStats.
 */
void
virDomainStatsRecordListFree(virDomainStatsRecordPtr *stats)
{
    virDomainStatsRecordPtr *next;

    if (!stats)
        return;

    for (next = stats; *next; next++) {
        virTypedParamsFree((*next)->params, (*next)->nparams);
        virDomainFree((*next)->dom);
        VIR_FREE(*next);
    }

    VIR_FREE(stats);
}
11625 11626 11627 11628 11629 11630 11631 11632 11633 11634 11635 11636 11637 11638 11639 11640 11641 11642 11643 11644 11645 11646 11647 11648 11649 11650 11651 11652 11653 11654 11655 11656 11657 11658 11659 11660 11661 11662 11663 11664 11665 11666 11667 11668 11669 11670 11671 11672 11673 11674 11675 11676 11677 11678 11679 11680 11681 11682 11683 11684 11685 11686 11687 11688 11689 11690


/**
 * virDomainGetFSInfo:
 * @dom: a domain object
 * @info: a pointer to a variable to store an array of mount points information
 * @flags: extra flags; not used yet, so callers should always pass 0
 *
 * Get a list of mapping information for each mounted file systems within the
 * specified guest and the disks.
 *
 * Returns the number of returned mount points, or -1 in case of error.
 * On success, the array of the information is stored into @info. The caller is
 * responsible for calling virDomainFSInfoFree() on each array element, then
 * calling free() on @info. On error, @info is set to NULL.
 */
int
virDomainGetFSInfo(virDomainPtr dom,
                   virDomainFSInfoPtr **info,
                   unsigned int flags)
{
    VIR_DOMAIN_DEBUG(dom, "info=%p, flags=%x", info, flags);

    virResetLastError();

    virCheckDomainReturn(dom, -1);
    virCheckReadOnlyGoto(dom->conn->flags, error);
    virCheckNonNullArgGoto(info, error);
    *info = NULL;

    if (dom->conn->driver->domainGetFSInfo) {
        int ret = dom->conn->driver->domainGetFSInfo(dom, info, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainFSInfoFree:
 * @info: pointer to a FSInfo object
 *
 * Frees all the memory occupied by @info.
 */
void
virDomainFSInfoFree(virDomainFSInfoPtr info)
{
    size_t i;

    if (!info)
        return;

    VIR_FREE(info->mountpoint);
    VIR_FREE(info->name);
    VIR_FREE(info->fstype);

    for (i = 0; i < info->ndevAlias; i++)
        VIR_FREE(info->devAlias[i]);
    VIR_FREE(info->devAlias);
11691 11692

    VIR_FREE(info);
11693
}
11694 11695 11696 11697 11698 11699 11700 11701 11702 11703 11704 11705 11706 11707 11708 11709 11710 11711 11712 11713 11714 11715 11716 11717 11718 11719 11720 11721 11722 11723 11724 11725

/**
 * virDomainInterfaceAddresses:
 * @dom: domain object
 * @ifaces: pointer to an array of pointers pointing to interface objects
 * @source: one of the virDomainInterfaceAddressesSource constants
 * @flags: currently unused, pass zero
 *
 * Return a pointer to the allocated array of pointers to interfaces
 * present in given domain along with their IP and MAC addresses. Note that
 * single interface can have multiple or even 0 IP addresses.
 *
 * This API dynamically allocates the virDomainInterfacePtr struct based on
 * how many interfaces domain @dom has, usually there's 1:1 correlation. The
 * count of the interfaces is returned as the return value.
 *
 * If @source is VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_LEASE, the DHCP lease
 * file associated with any virtual networks will be examined to obtain
 * the interface addresses. This only returns data for interfaces which
 * are connected to virtual networks managed by libvirt.
 *
 * If @source is VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_AGENT, a configured
 * guest agent is needed for successful return from this API. Moreover, if
 * guest agent is used then the interface name is the one seen by guest OS.
 * To match such interface with the one from @dom XML use MAC address or IP
 * range.
 *
 * @ifaces->name and @ifaces->hwaddr are never NULL.
 *
 * The caller *must* free @ifaces when no longer needed. Usual use case
 * looks like this:
 *
11726 11727 11728 11729
 *   virDomainInterfacePtr *ifaces = NULL;
 *   int ifaces_count = 0;
 *   size_t i, j;
 *   virDomainPtr dom = ... obtain a domain here ...;
11730
 *
11731 11732 11733
 *   if ((ifaces_count = virDomainInterfaceAddresses(dom, &ifaces,
 *            VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_LEASE)) < 0)
 *       goto cleanup;
11734 11735
 *
 *  ... do something with returned values, for example:
11736 11737 11738 11739 11740 11741 11742 11743 11744 11745 11746 11747 11748 11749 11750 11751 11752 11753 11754
 *
 *   for (i = 0; i < ifaces_count; i++) {
 *       printf("name: %s", ifaces[i]->name);
 *       if (ifaces[i]->hwaddr)
 *           printf(" hwaddr: %s", ifaces[i]->hwaddr);
 *
 *       for (j = 0; j < ifaces[i]->naddrs; j++) {
 *           virDomainIPAddressPtr ip_addr = ifaces[i]->addrs + j;
 *           printf("[addr: %s prefix: %d type: %d]",
 *                  ip_addr->addr, ip_addr->prefix, ip_addr->type);
 *       }
 *       printf("\n");
 *   }
 *
 *   cleanup:
 *       if (ifaces && ifaces_count > 0)
 *           for (i = 0; i < ifaces_count; i++)
 *               virDomainInterfaceFree(ifaces[i]);
 *       free(ifaces);
11755 11756 11757 11758 11759 11760 11761 11762 11763 11764 11765 11766 11767 11768 11769 11770 11771
 *
 * Returns the number of interfaces on success, -1 in case of error.
 */
int
virDomainInterfaceAddresses(virDomainPtr dom,
                            virDomainInterfacePtr **ifaces,
                            unsigned int source,
                            unsigned int flags)
{
    VIR_DOMAIN_DEBUG(dom, "ifaces=%p, source=%d, flags=%x", ifaces, source, flags);

    virResetLastError();

    if (ifaces)
        *ifaces = NULL;
    virCheckDomainReturn(dom, -1);
    virCheckNonNullArgGoto(ifaces, error);
11772 11773
    if (source == VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_AGENT)
        virCheckReadOnlyGoto(dom->conn->flags, error);
11774 11775 11776 11777 11778 11779 11780 11781 11782 11783 11784 11785 11786 11787 11788 11789 11790 11791 11792 11793 11794 11795 11796 11797 11798 11799 11800 11801 11802 11803 11804 11805 11806 11807 11808 11809 11810 11811 11812 11813 11814 11815

    if (dom->conn->driver->domainInterfaceAddresses) {
        int ret;
        ret = dom->conn->driver->domainInterfaceAddresses(dom, ifaces, source, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportError(VIR_ERR_NO_SUPPORT, __FUNCTION__);

 error:
    virDispatchError(dom->conn);
    return -1;
}


/**
 * virDomainInterfaceFree:
 * @iface: an interface object
 *
 * Free the interface object. The data structure is
 * freed and should not be used thereafter. If @iface
 * is NULL, then this method has no effect.
 */
void
virDomainInterfaceFree(virDomainInterfacePtr iface)
{
    size_t i;

    if (!iface)
        return;

    VIR_FREE(iface->name);
    VIR_FREE(iface->hwaddr);

    for (i = 0; i < iface->naddrs; i++)
        VIR_FREE(iface->addrs[i].addr);
    VIR_FREE(iface->addrs);

    VIR_FREE(iface);
}
11816 11817 11818 11819 11820 11821 11822 11823 11824 11825 11826 11827 11828 11829 11830 11831 11832 11833 11834 11835 11836 11837 11838 11839 11840 11841 11842 11843 11844 11845 11846 11847 11848 11849 11850 11851 11852 11853


/**
 * virDomainGetGuestVcpus:
 * @domain: pointer to domain object
 * @params: pointer that will be filled with an array of typed parameters
 * @nparams: pointer filled with number of elements in @params
 * @flags: currently unused, callers shall pass 0
 *
 * Queries the guest agent for state and information regarding vCPUs from
 * guest's perspective. The reported data depends on the guest agent
 * implementation.
 *
 * Reported fields stored in @params:
 * 'vcpus': string containing bitmap representing vCPU ids as reported by the
 *          guest
 * 'online': string containing bitmap representing online vCPUs as reported
 *           by the guest agent.
 * 'offlinable': string containing bitmap representing ids of vCPUs that can be
 *               offlined
 *
 * This API requires the VM to run. The caller is responsible for calling
 * virTypedParamsFree to free memory returned in @params.
 *
 * Returns 0 on success, -1 on error.
 */
int
virDomainGetGuestVcpus(virDomainPtr domain,
                       virTypedParameterPtr *params,
                       unsigned int *nparams,
                       unsigned int flags)
{
    VIR_DOMAIN_DEBUG(domain, "params=%p, nparams=%p, flags=%x",
                     params, nparams, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
11854 11855
    virCheckReadOnlyGoto(domain->conn->flags, error);

11856 11857 11858 11859 11860 11861 11862 11863 11864 11865 11866 11867 11868 11869 11870 11871 11872 11873
    virCheckNonNullArgGoto(params, error);
    virCheckNonNullArgGoto(nparams, error);

    if (domain->conn->driver->domainGetGuestVcpus) {
        int ret;
        ret = domain->conn->driver->domainGetGuestVcpus(domain, params, nparams,
                                                        flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}
11874 11875 11876 11877 11878 11879 11880 11881 11882 11883 11884 11885 11886 11887 11888 11889 11890 11891 11892 11893 11894 11895 11896 11897 11898 11899 11900 11901 11902 11903 11904 11905 11906 11907 11908 11909 11910 11911


/**
 * virDomainSetGuestVcpus:
 * @domain: pointer to domain object
 * @cpumap: text representation of a bitmap of vcpus to set
 * @state: 0 to disable/1 to enable cpus described by @cpumap
 * @flags: currently unused, callers shall pass 0
 *
 * Sets state of individual vcpus described by @cpumap via guest agent. Other
 * vcpus are not modified.
 *
 * This API requires the VM to run. Various hypervisors or guest agent
 * implementation may limit to operate on just 1 vCPU per call.
 *
 * @cpumap is a list of vCPU numbers. Its syntax is a comma separated list and
 * a special markup using '-' and '^' (ex. '0-4', '0-3,^2'). The '-' denotes
 * the range and the '^' denotes exclusive. The expression is sequentially
 * evaluated, so "0-15,^8" is identical to "9-14,0-7,15" but not identical to
 * "^8,0-15".
 *
 * Note that OSes (notably Linux) may require vCPU 0 to stay online to support
 * low-level features a S3 sleep.
 *
 * Returns 0 on success, -1 on error.
 */
int
virDomainSetGuestVcpus(virDomainPtr domain,
                       const char *cpumap,
                       int state,
                       unsigned int flags)
{
    VIR_DOMAIN_DEBUG(domain, "cpumap='%s' state=%x flags=%x",
                     NULLSTR(cpumap), state, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
11912 11913
    virCheckReadOnlyGoto(domain->conn->flags, error);

11914 11915 11916 11917 11918 11919 11920 11921 11922 11923 11924 11925 11926 11927 11928 11929 11930
    virCheckNonNullArgGoto(cpumap, error);

    if (domain->conn->driver->domainSetGuestVcpus) {
        int ret;
        ret = domain->conn->driver->domainSetGuestVcpus(domain, cpumap, state,
                                                        flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}
11931 11932 11933 11934 11935 11936 11937 11938 11939 11940 11941 11942 11943 11944 11945 11946 11947 11948 11949 11950 11951 11952 11953 11954 11955 11956 11957 11958 11959 11960 11961 11962 11963 11964 11965 11966 11967 11968 11969 11970 11971 11972 11973 11974 11975 11976 11977 11978


/**
 * virDomainSetVcpu:
 * @domain: pointer to domain object
 * @vcpumap: text representation of a bitmap of vcpus to set
 * @state: 0 to disable/1 to enable cpus described by @vcpumap
 * @flags: bitwise-OR of virDomainModificationImpact
 *
 * Enables/disables individual vcpus described by @vcpumap in the hypervisor.
 *
 * Various hypervisor implementations may limit to operate on just 1
 * hotpluggable entity (which may contain multiple vCPUs on certain platforms).
 *
 * Note that OSes and hypervisors may require vCPU 0 to stay online.
 *
 * Returns 0 on success, -1 on error.
 */
int
virDomainSetVcpu(virDomainPtr domain,
                 const char *vcpumap,
                 int state,
                 unsigned int flags)
{
    VIR_DOMAIN_DEBUG(domain, "vcpumap='%s' state=%i flags=%x",
                     NULLSTR(vcpumap), state, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    virCheckReadOnlyGoto(domain->conn->flags, error);

    virCheckNonNullArgGoto(vcpumap, error);

    if (domain->conn->driver->domainSetVcpu) {
        int ret;
        ret = domain->conn->driver->domainSetVcpu(domain, vcpumap, state, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}
11979 11980 11981 11982 11983 11984 11985 11986 11987 11988 11989 11990 11991 11992 11993 11994 11995 11996 11997 11998 11999 12000 12001 12002 12003 12004 12005 12006 12007 12008 12009 12010 12011 12012 12013 12014 12015 12016 12017 12018 12019 12020 12021 12022 12023 12024 12025 12026 12027 12028 12029 12030 12031 12032 12033 12034


/**
 * virDomainSetBlockThreshold:
 * @domain: pointer to domain object
 * @dev: string specifying the block device or backing chain element
 * @threshold: threshold in bytes when to fire the event
 * @flags: currently unused, callers should pass 0
 *
 * Set the threshold level for delivering the
 * VIR_DOMAIN_EVENT_ID_BLOCK_THRESHOLD if the device or backing chain element
 * described by @dev is written beyond the set threshold level. The threshold
 * level is unset once the event fires. The event might not be delivered at all
 * if libvirtd was not running at the moment when the threshold was reached.
 *
 * Hypervisors report the last written sector of an image in the bulk stats API
 * (virConnectGetAllDomainStats/virDomainListGetStats) as
 * "block.<num>.allocation" in the VIR_DOMAIN_STATS_BLOCK group. The current
 * threshold value is reported as "block.<num>.threshold".
 *
 * This event allows to use thin-provisioned storage which needs management
 * tools to grow it without the need for polling of the data.
 *
 * Returns 0 if the operation has started, -1 on failure.
 */
int
virDomainSetBlockThreshold(virDomainPtr domain,
                           const char *dev,
                           unsigned long long threshold,
                           unsigned int flags)
{
    VIR_DOMAIN_DEBUG(domain, "dev='%s' threshold=%llu flags=%x",
                     NULLSTR(dev), threshold, flags);

    virResetLastError();

    virCheckDomainReturn(domain, -1);
    virCheckReadOnlyGoto(domain->conn->flags, error);

    virCheckNonNullArgGoto(dev, error);

    if (domain->conn->driver->domainSetBlockThreshold) {
        int ret;
        ret = domain->conn->driver->domainSetBlockThreshold(domain, dev,
                                                            threshold, flags);
        if (ret < 0)
            goto error;
        return ret;
    }

    virReportUnsupportedError();

 error:
    virDispatchError(domain->conn);
    return -1;
}