xen_unified.c 34.3 KB
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/*
 * xen_unified.c: Unified Xen driver.
 *
 * Copyright (C) 2007 Red Hat, Inc.
 *
 * See COPYING.LIB for the License of this software
 *
 * Richard W.M. Jones <rjones@redhat.com>
 */

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#include "config.h"

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#ifdef WITH_XEN

/* Note:
 *
 * This driver provides a unified interface to the five
 * separate underlying Xen drivers (xen_internal, proxy_internal,
 * xend_internal, xs_internal and xm_internal).  Historically
 * the body of libvirt.c handled the five Xen drivers,
 * and contained Xen-specific code.
 */

#include <stdint.h>
#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/types.h>
#include <xen/dom0_ops.h>
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#include <libxml/uri.h>
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#include "internal.h"

#include "xen_unified.h"

#include "xen_internal.h"
#include "proxy_internal.h"
#include "xend_internal.h"
#include "xs_internal.h"
#include "xm_internal.h"
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#include "xml.h"
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#define DEBUG(fmt,...) VIR_DEBUG(__FILE__, fmt,__VA_ARGS__)

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static int
xenUnifiedNodeGetInfo (virConnectPtr conn, virNodeInfoPtr info);
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static int
xenUnifiedDomainGetMaxVcpus (virDomainPtr dom);
static int
xenUnifiedDomainGetVcpus (virDomainPtr dom,
                          virVcpuInfoPtr info, int maxinfo,
                          unsigned char *cpumaps, int maplen);
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/* The five Xen drivers below us. */
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static struct xenUnifiedDriver *drivers[XEN_UNIFIED_NR_DRIVERS] = {
    [XEN_UNIFIED_HYPERVISOR_OFFSET] = &xenHypervisorDriver,
    [XEN_UNIFIED_PROXY_OFFSET] = &xenProxyDriver,
    [XEN_UNIFIED_XEND_OFFSET] = &xenDaemonDriver,
    [XEN_UNIFIED_XS_OFFSET] = &xenStoreDriver,
    [XEN_UNIFIED_XM_OFFSET] = &xenXMDriver,
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};

/**
 * xenUnifiedError:
 * @conn: the connection
 * @error: the error number
 * @info: extra information string
 *
 * Handle an error at the xend daemon interface
 */
static void
xenUnifiedError (virConnectPtr conn, virErrorNumber error, const char *info)
{
    const char *errmsg;

    errmsg = __virErrorMsg (error, info);
    __virRaiseError (conn, NULL, NULL, VIR_FROM_XEN, error, VIR_ERR_ERROR,
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                     errmsg, info, NULL, 0, 0, errmsg, info);
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}

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/*
 * Helper functions currently used in the NUMA code
 * Those variables should not be accessed directly but through helper 
 * functions xenNbCells() and xenNbCpu() available to all Xen backends 
 */
static int nbNodeCells = -1;
static int nbNodeCpus = -1;

/**
 * xenNumaInit:
 * @conn: pointer to the hypervisor connection
 *
 * Initializer for previous variables. We currently assume that
 * the number of physical CPU and the numebr of NUMA cell is fixed
 * until reboot which might be false in future Xen implementations.
 */
static void
xenNumaInit(virConnectPtr conn) {
    virNodeInfo nodeInfo;
    int ret;

    ret = xenUnifiedNodeGetInfo(conn, &nodeInfo);
    if (ret < 0)
        return;
    nbNodeCells = nodeInfo.nodes;
    nbNodeCpus = nodeInfo.cpus;
}

/**
 * xenNbCells:
 * @conn: pointer to the hypervisor connection
 *
 * Number of NUMa cells present in the actual Node
 *
 * Returns the number of NUMA cells available on that Node
 */
int xenNbCells(virConnectPtr conn) {
    if (nbNodeCells < 0)
        xenNumaInit(conn);
    return(nbNodeCells);
}

/**
 * xenNbCpus:
 * @conn: pointer to the hypervisor connection
 *
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 * Number of CPUs present in the actual Node
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 *
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 * Returns the number of CPUs available on that Node
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 */
int xenNbCpus(virConnectPtr conn) {
    if (nbNodeCpus < 0)
        xenNumaInit(conn);
    return(nbNodeCpus);
}

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/**
 * xenDomainUsedCpus:
 * @dom: the domain
 *
 * Analyze which set of CPUs are used by the domain and
 * return a string providing the ranges.
 *
 * Returns the string which needs to be freed by the caller or
 *         NULL if the domain uses all CPU or in case of error.
 */
char *
xenDomainUsedCpus(virDomainPtr dom)
{
    char *res = NULL;
    int nb_cpu, ncpus;
    int nb_vcpu;
    char *cpulist = NULL;
    unsigned char *cpumap = NULL;
    size_t cpumaplen;
    int nb = 0;
    int n, m;
    virVcpuInfoPtr cpuinfo = NULL;
    virNodeInfo nodeinfo;

    if (!VIR_IS_CONNECTED_DOMAIN(dom))
        return (NULL);

    nb_cpu = xenNbCpus(dom->conn);
    if (nb_cpu <= 0)
        return(NULL);
    nb_vcpu = xenUnifiedDomainGetMaxVcpus(dom);
    if (nb_vcpu <= 0)
        return(NULL);
    if (xenUnifiedNodeGetInfo(dom->conn, &nodeinfo) < 0)
        return(NULL);

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    cpulist = calloc(nb_cpu, sizeof(*cpulist));
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    if (cpulist == NULL)
        goto done;
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    cpuinfo = malloc(sizeof(*cpuinfo) * nb_vcpu);
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    if (cpuinfo == NULL)
        goto done;
    cpumaplen = VIR_CPU_MAPLEN(VIR_NODEINFO_MAXCPUS(nodeinfo));
    cpumap = (unsigned char *) calloc(nb_vcpu, cpumaplen);
    if (cpumap == NULL)
        goto done;

    if ((ncpus = xenUnifiedDomainGetVcpus(dom, cpuinfo, nb_vcpu,
                                          cpumap, cpumaplen)) >= 0) {
	for (n = 0 ; n < ncpus ; n++) {
	    for (m = 0 ; m < nb_cpu; m++) {
	        if ((cpulist[m] == 0) &&
	 	    (VIR_CPU_USABLE(cpumap, cpumaplen, n, m))) {
		    cpulist[m] = 1;
		    nb++;
		    /* if all CPU are used just return NULL */
		    if (nb == nb_cpu) 
		        goto done;
		        
		}
	    }
	}
        res = virSaveCpuSet(dom->conn, cpulist, nb_cpu);
    }

done:
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    free(cpulist);
    free(cpumap);
    free(cpuinfo);
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    return(res);
}

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/*----- Dispatch functions. -----*/

/* These dispatch functions follow the model used historically
 * by libvirt.c -- trying each low-level Xen driver in turn
 * until one succeeds.  However since we know what low-level
 * drivers can perform which functions, it is probably better
 * in future to optimise these dispatch functions to just call
 * the single function (or small number of appropriate functions)
 * in the low level drivers directly.
 */

static int
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xenUnifiedOpen (virConnectPtr conn, xmlURIPtr uri, virConnectAuthPtr auth, int flags)
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{
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    int i, j;
    xenUnifiedPrivatePtr priv;
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    /* Refuse any scheme which isn't "xen://" or "http://". */
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    if (uri->scheme &&
        strcasecmp(uri->scheme, "xen") != 0 &&
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        strcasecmp(uri->scheme, "http") != 0)
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        return VIR_DRV_OPEN_DECLINED;

    /* xmlParseURI will parse a naked string like "foo" as a URI with
     * a NULL scheme.  That's not useful for us because we want to only
     * allow full pathnames (eg. ///var/lib/xen/xend-socket).  Decline
     * anything else.
     */
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    if (!uri->scheme && (!uri->path || uri->path[0] != '/'))
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        return VIR_DRV_OPEN_DECLINED;
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    /* Refuse any xen:// URI with a server specified - allow remote to do it */
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    if (uri->scheme && strcasecmp(uri->scheme, "xen") == 0 && uri->server)
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        return VIR_DRV_OPEN_DECLINED;
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    /* Allocate per-connection private data. */
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    priv = calloc (1, sizeof *priv);
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    if (!priv) {
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        xenUnifiedError (NULL, VIR_ERR_NO_MEMORY, "allocating private data");
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        return VIR_DRV_OPEN_ERROR;
    }
    conn->privateData = priv;

    priv->handle = -1;
    priv->xendConfigVersion = -1;
    priv->type = -1;
    priv->len = -1;
    priv->addr = NULL;
    priv->xshandle = NULL;
    priv->proxy = -1;

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    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i) {
        priv->opened[i] = 0;
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        /* Only use XM driver for Xen <= 3.0.3 (ie xendConfigVersion <= 2) */
        if (drivers[i] == &xenXMDriver &&
            priv->xendConfigVersion > 2)
            continue;

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        /* Ignore proxy for root */
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        if (i == XEN_UNIFIED_PROXY_OFFSET && getuid() == 0)
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            continue;

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        if (drivers[i]->open) {
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            DEBUG("trying Xen sub-driver %d", i);
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            if (drivers[i]->open (conn, uri, auth, flags) == VIR_DRV_OPEN_SUCCESS)
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                priv->opened[i] = 1;
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            DEBUG("Xen sub-driver %d open %s\n",
                  i, priv->opened[i] ? "ok" : "failed");
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        }
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        /* If as root, then all drivers must succeed.
           If non-root, then only proxy must succeed */
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        if (!priv->opened[i] &&
            (getuid() == 0 || i == XEN_UNIFIED_PROXY_OFFSET)) {
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            for (j = 0; j < i; ++j)
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                if (priv->opened[j]) drivers[j]->close (conn);
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            free (priv);
            /* The assumption is that one of the underlying drivers
             * has set virterror already.
             */
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            return VIR_DRV_OPEN_ERROR;
        }
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    }

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    return VIR_DRV_OPEN_SUCCESS;
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}

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#define GET_PRIVATE(conn) \
    xenUnifiedPrivatePtr priv = (xenUnifiedPrivatePtr) (conn)->privateData

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static int
xenUnifiedClose (virConnectPtr conn)
{
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    GET_PRIVATE(conn);
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    int i;
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    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->close)
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            (void) drivers[i]->close (conn);
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    free (conn->privateData);
    conn->privateData = NULL;
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    return 0;
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}

static const char *
xenUnifiedType (virConnectPtr conn)
{
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    GET_PRIVATE(conn);
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    int i;
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    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
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        if (priv->opened[i])
            return "Xen";
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    return NULL;
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}

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/* Which features are supported by this driver? */
static int
xenUnifiedSupportsFeature (virConnectPtr conn ATTRIBUTE_UNUSED, int feature)
{
    switch (feature) {
    case VIR_DRV_FEATURE_MIGRATION_V1: return 1;
    default: return 0;
    }
}

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static int
xenUnifiedVersion (virConnectPtr conn, unsigned long *hvVer)
{
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    GET_PRIVATE(conn);
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    int i;
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    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] &&
            drivers[i]->version &&
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            drivers[i]->version (conn, hvVer) == 0)
            return 0;
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    return -1;
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}

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/* NB: Even if connected to the proxy, we're still on the
 * same machine.
 */
static char *
xenUnifiedGetHostname (virConnectPtr conn)
{
    int r;
    char hostname [HOST_NAME_MAX+1], *str;

    r = gethostname (hostname, HOST_NAME_MAX+1);
    if (r == -1) {
        xenUnifiedError (conn, VIR_ERR_SYSTEM_ERROR, strerror (errno));
        return NULL;
    }
    str = strdup (hostname);
    if (str == NULL) {
        xenUnifiedError (conn, VIR_ERR_SYSTEM_ERROR, strerror (errno));
        return NULL;
    }
    return str;
}

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static int
xenUnifiedGetMaxVcpus (virConnectPtr conn, const char *type)
{
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    GET_PRIVATE(conn);
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    if (type && STRCASENEQ (type, "Xen")) {
        xenUnifiedError (conn, VIR_ERR_INVALID_ARG, __FUNCTION__);
        return -1;
    }
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    if (priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET])
        return xenHypervisorGetMaxVcpus (conn, type);
    else {
        xenUnifiedError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
        return -1;
    }
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}

static int
xenUnifiedNodeGetInfo (virConnectPtr conn, virNodeInfoPtr info)
{
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    GET_PRIVATE(conn);
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    int i;
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    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] &&
            drivers[i]->nodeGetInfo &&
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            drivers[i]->nodeGetInfo (conn, info) == 0)
            return 0;
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    return -1;
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}

static char *
xenUnifiedGetCapabilities (virConnectPtr conn)
{
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    GET_PRIVATE(conn);
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    int i;
    char *ret;
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    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->getCapabilities) {
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            ret = drivers[i]->getCapabilities (conn);
            if (ret) return ret;
        }
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    return NULL;
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}

static int
xenUnifiedListDomains (virConnectPtr conn, int *ids, int maxids)
{
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    GET_PRIVATE(conn);
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    int i, ret;
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    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->listDomains) {
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            ret = drivers[i]->listDomains (conn, ids, maxids);
            if (ret >= 0) return ret;
        }
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    return -1;
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}

static int
xenUnifiedNumOfDomains (virConnectPtr conn)
{
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    GET_PRIVATE(conn);
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    int i, ret;
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    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->numOfDomains) {
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            ret = drivers[i]->numOfDomains (conn);
            if (ret >= 0) return ret;
        }
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    return -1;
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}

static virDomainPtr
xenUnifiedDomainCreateLinux (virConnectPtr conn,
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                             const char *xmlDesc, unsigned int flags)
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{
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    GET_PRIVATE(conn);
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    int i;
    virDomainPtr ret;
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    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->domainCreateLinux) {
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            ret = drivers[i]->domainCreateLinux (conn, xmlDesc, flags);
            if (ret) return ret;
        }
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    return NULL;
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}

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/* Assumption made in underlying drivers:
 * If the domain is "not found" and there is no other error, then
 * the Lookup* functions return a NULL but do not set virterror.
 */
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static virDomainPtr
xenUnifiedDomainLookupByID (virConnectPtr conn, int id)
{
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    GET_PRIVATE(conn);
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    virDomainPtr ret;
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    /* Reset any connection-level errors in virterror first, in case
     * there is one hanging around from a previous call.
     */
    virConnResetLastError (conn);

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    /* Try hypervisor/xenstore combo. */
    if (priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET]) {
        ret = xenHypervisorLookupDomainByID (conn, id);
        if (ret || conn->err.code != VIR_ERR_OK)
            return ret;
    }

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    /* Try proxy. */
    if (priv->opened[XEN_UNIFIED_PROXY_OFFSET]) {
        ret = xenProxyLookupByID (conn, id);
        if (ret || conn->err.code != VIR_ERR_OK)
            return ret;
    }

    /* Try xend. */
    if (priv->opened[XEN_UNIFIED_XEND_OFFSET]) {
        ret = xenDaemonLookupByID (conn, id);
        if (ret || conn->err.code != VIR_ERR_OK)
            return ret;
    }
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    /* Not found. */
    xenUnifiedError (conn, VIR_ERR_NO_DOMAIN, __FUNCTION__);
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    return NULL;
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}

static virDomainPtr
xenUnifiedDomainLookupByUUID (virConnectPtr conn,
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                              const unsigned char *uuid)
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{
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    GET_PRIVATE(conn);
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    virDomainPtr ret;
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    /* Reset any connection-level errors in virterror first, in case
     * there is one hanging around from a previous call.
     */
    virConnResetLastError (conn);

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    /* Try hypervisor/xenstore combo. */
    if (priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET]) {
        ret = xenHypervisorLookupDomainByUUID (conn, uuid);
        if (ret || conn->err.code != VIR_ERR_OK)
            return ret;
    }

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    /* Try proxy. */
    if (priv->opened[XEN_UNIFIED_PROXY_OFFSET]) {
        ret = xenProxyLookupByUUID (conn, uuid);
        if (ret || conn->err.code != VIR_ERR_OK)
            return ret;
    }

    /* Try xend. */
    if (priv->opened[XEN_UNIFIED_XEND_OFFSET]) {
        ret = xenDaemonLookupByUUID (conn, uuid);
        if (ret || conn->err.code != VIR_ERR_OK)
            return ret;
    }
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    /* Try XM for inactive domains. */
    if (priv->opened[XEN_UNIFIED_XM_OFFSET]) {
        ret = xenXMDomainLookupByUUID (conn, uuid);
        if (ret || conn->err.code != VIR_ERR_OK)
            return ret;
    }

    /* Not found. */
    xenUnifiedError (conn, VIR_ERR_NO_DOMAIN, __FUNCTION__);
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    return NULL;
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}

static virDomainPtr
xenUnifiedDomainLookupByName (virConnectPtr conn,
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                              const char *name)
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{
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    GET_PRIVATE(conn);
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    virDomainPtr ret;
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    /* Reset any connection-level errors in virterror first, in case
     * there is one hanging around from a previous call.
     */
    virConnResetLastError (conn);

    /* Try proxy. */
    if (priv->opened[XEN_UNIFIED_PROXY_OFFSET]) {
        ret = xenProxyLookupByName (conn, name);
        if (ret || conn->err.code != VIR_ERR_OK)
            return ret;
    }

    /* Try xend. */
    if (priv->opened[XEN_UNIFIED_XEND_OFFSET]) {
        ret = xenDaemonLookupByName (conn, name);
        if (ret || conn->err.code != VIR_ERR_OK)
            return ret;
    }

    /* Try xenstore for inactive domains. */
    if (priv->opened[XEN_UNIFIED_XS_OFFSET]) {
        ret = xenStoreLookupByName (conn, name);
        if (ret || conn->err.code != VIR_ERR_OK)
            return ret;
    }

    /* Try XM for inactive domains. */
    if (priv->opened[XEN_UNIFIED_XM_OFFSET]) {
        ret = xenXMDomainLookupByName (conn, name);
        if (ret || conn->err.code != VIR_ERR_OK)
            return ret;
    }
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    /* Not found. */
    xenUnifiedError (conn, VIR_ERR_NO_DOMAIN, __FUNCTION__);
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    return NULL;
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}

static int
xenUnifiedDomainSuspend (virDomainPtr dom)
{
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    GET_PRIVATE(dom->conn);
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    int i;
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    /* Try non-hypervisor methods first, then hypervisor direct method
     * as a last resort.
     */
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    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
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        if (i != XEN_UNIFIED_HYPERVISOR_OFFSET &&
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            priv->opened[i] &&
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            drivers[i]->domainSuspend &&
            drivers[i]->domainSuspend (dom) == 0)
            return 0;
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    if (priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET] &&
        drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->domainSuspend &&
        drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->domainSuspend (dom) == 0)
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        return 0;
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    return -1;
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}

static int
xenUnifiedDomainResume (virDomainPtr dom)
{
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    GET_PRIVATE(dom->conn);
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    int i;
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    /* Try non-hypervisor methods first, then hypervisor direct method
     * as a last resort.
     */
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    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
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        if (i != XEN_UNIFIED_HYPERVISOR_OFFSET &&
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            priv->opened[i] &&
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            drivers[i]->domainResume &&
            drivers[i]->domainResume (dom) == 0)
            return 0;
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    if (priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET] &&
        drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->domainResume &&
        drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->domainResume (dom) == 0)
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        return 0;
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    return -1;
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}

static int
xenUnifiedDomainShutdown (virDomainPtr dom)
{
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    GET_PRIVATE(dom->conn);
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    int i;
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    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] &&
            drivers[i]->domainShutdown &&
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            drivers[i]->domainShutdown (dom) == 0)
            return 0;
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    return -1;
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}

static int
xenUnifiedDomainReboot (virDomainPtr dom, unsigned int flags)
{
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    GET_PRIVATE(dom->conn);
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    int i;
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    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] &&
            drivers[i]->domainReboot &&
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            drivers[i]->domainReboot (dom, flags) == 0)
            return 0;
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    return -1;
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}

static int
xenUnifiedDomainDestroy (virDomainPtr dom)
{
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    GET_PRIVATE(dom->conn);
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    int i;
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    /* Try non-hypervisor methods first, then hypervisor direct method
     * as a last resort.
     */
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    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
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        if (i != XEN_UNIFIED_HYPERVISOR_OFFSET &&
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            priv->opened[i] &&
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            drivers[i]->domainDestroy &&
            drivers[i]->domainDestroy (dom) == 0)
            return 0;
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    if (priv->opened[i] &&
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        drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->domainDestroy &&
        drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->domainDestroy (dom) == 0)
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        return 0;
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    return -1;
703 704 705 706 707
}

static char *
xenUnifiedDomainGetOSType (virDomainPtr dom)
{
708
    GET_PRIVATE(dom->conn);
709 710
    int i;
    char *ret;
711

712 713
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->domainGetOSType) {
714 715 716
            ret = drivers[i]->domainGetOSType (dom);
            if (ret) return ret;
        }
717

718
    return NULL;
719 720 721 722 723
}

static unsigned long
xenUnifiedDomainGetMaxMemory (virDomainPtr dom)
{
724
    GET_PRIVATE(dom->conn);
725 726
    int i;
    unsigned long ret;
727

728 729
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->domainGetMaxMemory) {
730 731 732
            ret = drivers[i]->domainGetMaxMemory (dom);
            if (ret != 0) return ret;
        }
733

734
    return 0;
735 736 737 738 739
}

static int
xenUnifiedDomainSetMaxMemory (virDomainPtr dom, unsigned long memory)
{
740
    GET_PRIVATE(dom->conn);
741
    int i;
742

743 744 745
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] &&
            drivers[i]->domainSetMaxMemory &&
746 747
            drivers[i]->domainSetMaxMemory (dom, memory) == 0)
            return 0;
748

749
    return -1;
750 751 752 753 754
}

static int
xenUnifiedDomainSetMemory (virDomainPtr dom, unsigned long memory)
{
755
    GET_PRIVATE(dom->conn);
756
    int i;
757

758 759 760
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] &&
            drivers[i]->domainSetMemory &&
761 762
            drivers[i]->domainSetMemory (dom, memory) == 0)
            return 0;
763

764
    return -1;
765 766 767 768 769
}

static int
xenUnifiedDomainGetInfo (virDomainPtr dom, virDomainInfoPtr info)
{
770
    GET_PRIVATE(dom->conn);
771
    int i;
772

773 774 775
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] &&
            drivers[i]->domainGetInfo &&
776 777
            drivers[i]->domainGetInfo (dom, info) == 0)
            return 0;
778

779
    return -1;
780 781 782 783 784
}

static int
xenUnifiedDomainSave (virDomainPtr dom, const char *to)
{
785
    GET_PRIVATE(dom->conn);
786
    int i;
787

788 789 790
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] &&
            drivers[i]->domainSave &&
791 792
            drivers[i]->domainSave (dom, to) == 0)
            return 0;
793

794
    return -1;
795 796 797 798 799
}

static int
xenUnifiedDomainRestore (virConnectPtr conn, const char *from)
{
800
    GET_PRIVATE(conn);
801
    int i;
802

803 804 805
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] &&
            drivers[i]->domainRestore &&
806 807
            drivers[i]->domainRestore (conn, from) == 0)
            return 0;
808

809
    return -1;
810 811 812 813 814
}

static int
xenUnifiedDomainCoreDump (virDomainPtr dom, const char *to, int flags)
{
815
    GET_PRIVATE(dom->conn);
816
    int i;
817

818 819 820
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] &&
            drivers[i]->domainCoreDump &&
821 822
            drivers[i]->domainCoreDump (dom, to, flags) == 0)
            return 0;
823

824
    return -1;
825 826 827 828 829
}

static int
xenUnifiedDomainSetVcpus (virDomainPtr dom, unsigned int nvcpus)
{
830
    GET_PRIVATE(dom->conn);
831
    int i;
832

833 834 835
    /* Try non-hypervisor methods first, then hypervisor direct method
     * as a last resort.
     */
836
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
837
        if (i != XEN_UNIFIED_HYPERVISOR_OFFSET &&
838
            priv->opened[i] &&
839 840 841
            drivers[i]->domainSetVcpus &&
            drivers[i]->domainSetVcpus (dom, nvcpus) == 0)
            return 0;
842

843 844 845
    if (priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET] &&
        drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->domainSetVcpus &&
        drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->domainSetVcpus (dom, nvcpus) == 0)
846
        return 0;
847

848
    return -1;
849 850 851 852
}

static int
xenUnifiedDomainPinVcpu (virDomainPtr dom, unsigned int vcpu,
853
                         unsigned char *cpumap, int maplen)
854
{
855
    GET_PRIVATE(dom->conn);
856
    int i;
857

858 859 860
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] &&
            drivers[i]->domainPinVcpu &&
861 862
            drivers[i]->domainPinVcpu (dom, vcpu, cpumap, maplen) == 0)
            return 0;
863

864
    return -1;
865 866 867 868
}

static int
xenUnifiedDomainGetVcpus (virDomainPtr dom,
869 870
                          virVcpuInfoPtr info, int maxinfo,
                          unsigned char *cpumaps, int maplen)
871
{
872
    GET_PRIVATE(dom->conn);
873
    int i, ret;
874

875 876
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->domainGetVcpus) {
877 878 879 880
            ret = drivers[i]->domainGetVcpus (dom, info, maxinfo, cpumaps, maplen);
            if (ret > 0)
                return ret;
        }
881
    return -1;
882 883 884 885 886
}

static int
xenUnifiedDomainGetMaxVcpus (virDomainPtr dom)
{
887
    GET_PRIVATE(dom->conn);
888
    int i, ret;
889

890 891
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->domainGetMaxVcpus) {
892 893 894
            ret = drivers[i]->domainGetMaxVcpus (dom);
            if (ret != 0) return ret;
        }
895

896
    return -1;
897 898 899 900 901
}

static char *
xenUnifiedDomainDumpXML (virDomainPtr dom, int flags)
{
902
    GET_PRIVATE(dom->conn);
903

904 905 906 907 908 909 910 911 912
    if (dom->id == -1 && priv->xendConfigVersion < 3 ) {
        if (priv->opened[XEN_UNIFIED_XM_OFFSET])
            return xenXMDomainDumpXML(dom, flags);
    } else {
        if (priv->opened[XEN_UNIFIED_XEND_OFFSET]) {
            char *cpus, *res;
            cpus = xenDomainUsedCpus(dom);
            res = xenDaemonDomainDumpXML(dom, flags, cpus);
	        free(cpus);
913
            return(res);
914
        }
915 916 917
        if (priv->opened[XEN_UNIFIED_PROXY_OFFSET])
            return xenProxyDomainDumpXML(dom, flags);
    } 
918

919
    xenUnifiedError (dom->conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
920
    return NULL;
921 922
}

923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973
static int
xenUnifiedDomainMigratePrepare (virConnectPtr dconn,
                                char **cookie,
                                int *cookielen,
                                const char *uri_in,
                                char **uri_out,
                                unsigned long flags,
                                const char *dname,
                                unsigned long resource)
{
    GET_PRIVATE(dconn);

    if (priv->opened[XEN_UNIFIED_XEND_OFFSET])
        return xenDaemonDomainMigratePrepare (dconn, cookie, cookielen,
                                              uri_in, uri_out,
                                              flags, dname, resource);

    xenUnifiedError (dconn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
    return -1;
}

static int
xenUnifiedDomainMigratePerform (virDomainPtr dom,
                                const char *cookie,
                                int cookielen,
                                const char *uri,
                                unsigned long flags,
                                const char *dname,
                                unsigned long resource)
{
    GET_PRIVATE(dom->conn);

    if (priv->opened[XEN_UNIFIED_XEND_OFFSET])
        return xenDaemonDomainMigratePerform (dom, cookie, cookielen, uri,
                                              flags, dname, resource);

    xenUnifiedError (dom->conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
    return -1;
}

static virDomainPtr
xenUnifiedDomainMigrateFinish (virConnectPtr dconn,
                               const char *dname,
                               const char *cookie ATTRIBUTE_UNUSED,
                               int cookielen ATTRIBUTE_UNUSED,
                               const char *uri ATTRIBUTE_UNUSED,
                               unsigned long flags ATTRIBUTE_UNUSED)
{
    return xenUnifiedDomainLookupByName (dconn, dname);
}

974 975
static int
xenUnifiedListDefinedDomains (virConnectPtr conn, char **const names,
976
                              int maxnames)
977
{
978
    GET_PRIVATE(conn);
979 980
    int i;
    int ret;
981

982 983
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->listDefinedDomains) {
984 985 986
            ret = drivers[i]->listDefinedDomains (conn, names, maxnames);
            if (ret >= 0) return ret;
        }
987

988
    return -1;
989 990 991 992 993
}

static int
xenUnifiedNumOfDefinedDomains (virConnectPtr conn)
{
994
    GET_PRIVATE(conn);
995 996
    int i;
    int ret;
997

998 999
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->numOfDefinedDomains) {
1000 1001 1002
            ret = drivers[i]->numOfDefinedDomains (conn);
            if (ret >= 0) return ret;
        }
1003

1004
    return -1;
1005 1006 1007 1008 1009
}

static int
xenUnifiedDomainCreate (virDomainPtr dom)
{
1010
    GET_PRIVATE(dom->conn);
1011
    int i;
1012

1013 1014
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->domainCreate &&
1015 1016
            drivers[i]->domainCreate (dom) == 0)
            return 0;
1017

1018
    return -1;
1019 1020 1021 1022 1023
}

static virDomainPtr
xenUnifiedDomainDefineXML (virConnectPtr conn, const char *xml)
{
1024
    GET_PRIVATE(conn);
1025 1026
    int i;
    virDomainPtr ret;
1027

1028 1029
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->domainDefineXML) {
1030 1031 1032
            ret = drivers[i]->domainDefineXML (conn, xml);
            if (ret) return ret;
        }
1033

1034
    return NULL;
1035 1036 1037 1038 1039
}

static int
xenUnifiedDomainUndefine (virDomainPtr dom)
{
1040
    GET_PRIVATE(dom->conn);
1041
    int i;
1042

1043 1044
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->domainUndefine &&
1045 1046
            drivers[i]->domainUndefine (dom) == 0)
            return 0;
1047

1048
    return -1;
1049 1050 1051
}

static int
1052
xenUnifiedDomainAttachDevice (virDomainPtr dom, const char *xml)
1053
{
1054
    GET_PRIVATE(dom->conn);
1055
    int i;
1056

1057 1058
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->domainAttachDevice &&
1059 1060
            drivers[i]->domainAttachDevice (dom, xml) == 0)
            return 0;
1061

1062
    return -1;
1063 1064 1065
}

static int
1066
xenUnifiedDomainDetachDevice (virDomainPtr dom, const char *xml)
1067
{
1068
    GET_PRIVATE(dom->conn);
1069
    int i;
1070

1071 1072
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->domainDetachDevice &&
1073 1074
            drivers[i]->domainDetachDevice (dom, xml) == 0)
            return 0;
1075

1076
    return -1;
1077 1078
}

1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 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
static char *
xenUnifiedDomainGetSchedulerType (virDomainPtr dom, int *nparams)
{
    GET_PRIVATE(dom->conn);
    int i;
    char *schedulertype;

    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; i++) {
        if (priv->opened[i] && drivers[i]->domainGetSchedulerType) {
            schedulertype = drivers[i]->domainGetSchedulerType (dom, nparams);
	    if (schedulertype != NULL)
		return(schedulertype); 
        }
    }
    return(NULL);
}

static int
xenUnifiedDomainGetSchedulerParameters (virDomainPtr dom,
                    virSchedParameterPtr params, int *nparams)
{
    GET_PRIVATE(dom->conn);
    int i, ret;

    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i) {
        if (priv->opened[i] && drivers[i]->domainGetSchedulerParameters) {
           ret = drivers[i]->domainGetSchedulerParameters(dom, params, nparams);
	   if (ret == 0)
	       return(0);
	}
    }
    return(-1);
}

static int
xenUnifiedDomainSetSchedulerParameters (virDomainPtr dom,
                    virSchedParameterPtr params, int nparams)
{
    GET_PRIVATE(dom->conn);
    int i, ret;

    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i) {
        if (priv->opened[i] && drivers[i]->domainSetSchedulerParameters) {
           ret = drivers[i]->domainSetSchedulerParameters(dom, params, nparams);
	   if (ret == 0)
	       return 0;
	}
    }

    return(-1);
}

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
static int
xenUnifiedDomainBlockStats (virDomainPtr dom, const char *path,
                            struct _virDomainBlockStats *stats)
{
    GET_PRIVATE (dom->conn);

    if (priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET])
        return xenHypervisorDomainBlockStats (dom, path, stats);

    xenUnifiedError (dom->conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
    return -1;
}

static int
xenUnifiedDomainInterfaceStats (virDomainPtr dom, const char *path,
                                struct _virDomainInterfaceStats *stats)
{
    GET_PRIVATE (dom->conn);

    if (priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET])
        return xenHypervisorDomainInterfaceStats (dom, path, stats);

    xenUnifiedError (dom->conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
    return -1;
}

1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170
static int
xenUnifiedNodeGetCellsFreeMemory (virConnectPtr conn, unsigned long long *freeMems,
                                  int startCell, int maxCells)
{
    GET_PRIVATE (conn);

    if (priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET])
        return xenHypervisorNodeGetCellsFreeMemory (conn, freeMems, 
                                                    startCell, maxCells);

    xenUnifiedError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
    return -1;
}

1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189
static unsigned long long
xenUnifiedNodeGetFreeMemory (virConnectPtr conn)
{
    unsigned long long freeMem = 0;
    int ret;
    GET_PRIVATE (conn);

    if (priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET]) {
        ret = xenHypervisorNodeGetCellsFreeMemory (conn, &freeMem, 
                                                    -1, 1);
	if (ret != 1)
	    return (0);
	return(freeMem);
    }

    xenUnifiedError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
    return(0);
}

1190 1191
/*----- Register with libvirt.c, and initialise Xen drivers. -----*/

1192 1193 1194
#define HV_VERSION ((DOM0_INTERFACE_VERSION >> 24) * 1000000 +         \
                    ((DOM0_INTERFACE_VERSION >> 16) & 0xFF) * 1000 +   \
                    (DOM0_INTERFACE_VERSION & 0xFFFF))
1195 1196 1197

/* The interface which we export upwards to libvirt.c. */
static virDriver xenUnifiedDriver = {
1198
    .no = VIR_DRV_XEN_UNIFIED,
1199
    .name = "Xen",
1200
    .ver = HV_VERSION,
1201 1202
    .open 			= xenUnifiedOpen,
    .close 			= xenUnifiedClose,
1203
    .supports_feature   = xenUnifiedSupportsFeature,
1204 1205
    .type 			= xenUnifiedType,
    .version 			= xenUnifiedVersion,
1206
    .getHostname    = xenUnifiedGetHostname,
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
    .getMaxVcpus 			= xenUnifiedGetMaxVcpus,
    .nodeGetInfo 			= xenUnifiedNodeGetInfo,
    .getCapabilities 		= xenUnifiedGetCapabilities,
    .listDomains 			= xenUnifiedListDomains,
    .numOfDomains 		= xenUnifiedNumOfDomains,
    .domainCreateLinux 		= xenUnifiedDomainCreateLinux,
    .domainLookupByID 		= xenUnifiedDomainLookupByID,
    .domainLookupByUUID 		= xenUnifiedDomainLookupByUUID,
    .domainLookupByName 		= xenUnifiedDomainLookupByName,
    .domainSuspend 		= xenUnifiedDomainSuspend,
    .domainResume 		= xenUnifiedDomainResume,
    .domainShutdown 		= xenUnifiedDomainShutdown,
    .domainReboot 		= xenUnifiedDomainReboot,
    .domainDestroy 		= xenUnifiedDomainDestroy,
    .domainGetOSType 		= xenUnifiedDomainGetOSType,
    .domainGetMaxMemory 		= xenUnifiedDomainGetMaxMemory,
    .domainSetMaxMemory 		= xenUnifiedDomainSetMaxMemory,
    .domainSetMemory 		= xenUnifiedDomainSetMemory,
    .domainGetInfo 		= xenUnifiedDomainGetInfo,
    .domainSave 			= xenUnifiedDomainSave,
    .domainRestore 		= xenUnifiedDomainRestore,
    .domainCoreDump 		= xenUnifiedDomainCoreDump,
    .domainSetVcpus 		= xenUnifiedDomainSetVcpus,
    .domainPinVcpu 		= xenUnifiedDomainPinVcpu,
    .domainGetVcpus 		= xenUnifiedDomainGetVcpus,
    .domainGetMaxVcpus 		= xenUnifiedDomainGetMaxVcpus,
    .domainDumpXML 		= xenUnifiedDomainDumpXML,
    .listDefinedDomains 		= xenUnifiedListDefinedDomains,
    .numOfDefinedDomains 		= xenUnifiedNumOfDefinedDomains,
    .domainCreate 		= xenUnifiedDomainCreate,
    .domainDefineXML 		= xenUnifiedDomainDefineXML,
    .domainUndefine 		= xenUnifiedDomainUndefine,
    .domainAttachDevice 		= xenUnifiedDomainAttachDevice,
    .domainDetachDevice 		= xenUnifiedDomainDetachDevice,
1241 1242 1243
    .domainGetSchedulerType	= xenUnifiedDomainGetSchedulerType,
    .domainGetSchedulerParameters	= xenUnifiedDomainGetSchedulerParameters,
    .domainSetSchedulerParameters	= xenUnifiedDomainSetSchedulerParameters,
1244 1245 1246
    .domainMigratePrepare		= xenUnifiedDomainMigratePrepare,
    .domainMigratePerform		= xenUnifiedDomainMigratePerform,
    .domainMigrateFinish		= xenUnifiedDomainMigrateFinish,
1247 1248
    .domainBlockStats	= xenUnifiedDomainBlockStats,
    .domainInterfaceStats = xenUnifiedDomainInterfaceStats,
1249
    .nodeGetCellsFreeMemory = xenUnifiedNodeGetCellsFreeMemory,
1250
    .getFreeMemory = xenUnifiedNodeGetFreeMemory,
1251 1252
};

1253 1254 1255 1256 1257 1258 1259
/**
 * xenUnifiedRegister:
 *
 * Register xen related drivers
 *
 * Returns the driver priority or -1 in case of error.
 */
1260 1261 1262
int
xenUnifiedRegister (void)
{
1263 1264 1265 1266 1267 1268
    /* Ignore failures here. */
    (void) xenHypervisorInit ();
    (void) xenProxyInit ();
    (void) xenDaemonInit ();
    (void) xenStoreInit ();
    (void) xenXMInit ();
1269

1270
    return virRegisterDriver (&xenUnifiedDriver);
1271 1272 1273
}

#endif /* WITH_XEN */
1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287

/*
 * vim: set tabstop=4:
 * vim: set shiftwidth=4:
 * vim: set expandtab:
 */
/*
 * Local variables:
 *  indent-tabs-mode: nil
 *  c-indent-level: 4
 *  c-basic-offset: 4
 *  tab-width: 4
 * End:
 */