xen_unified.c 34.4 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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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);

    cpulist = (char *) calloc(nb_cpu, sizeof(char));
    if (cpulist == NULL)
        goto done;
    cpuinfo = malloc(sizeof(virVcpuInfo) * nb_vcpu);
    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:
    if (cpulist != NULL)
        free(cpulist);
    if (cpumap != NULL)
        free(cpumap);
    if (cpuinfo != NULL)
        free(cpuinfo);
    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, 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) {
#ifdef ENABLE_DEBUG
            fprintf (stderr, "libvirt: xenUnifiedOpen: trying Xen sub-driver %d\n", i);
#endif
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            if (drivers[i]->open (conn, uri, flags) == VIR_DRV_OPEN_SUCCESS)
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                priv->opened[i] = 1;
#ifdef ENABLE_DEBUG
            fprintf (stderr, "libvirt: xenUnifiedOpen: Xen sub-driver %d open %s\n",
                     i, priv->opened[i] ? "ok" : "failed");
#endif
        }
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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] &&
703 704
        drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->domainDestroy &&
        drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->domainDestroy (dom) == 0)
705
        return 0;
706

707
    return -1;
708 709 710 711 712
}

static char *
xenUnifiedDomainGetOSType (virDomainPtr dom)
{
713
    GET_PRIVATE(dom->conn);
714 715
    int i;
    char *ret;
716

717 718
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->domainGetOSType) {
719 720 721
            ret = drivers[i]->domainGetOSType (dom);
            if (ret) return ret;
        }
722

723
    return NULL;
724 725 726 727 728
}

static unsigned long
xenUnifiedDomainGetMaxMemory (virDomainPtr dom)
{
729
    GET_PRIVATE(dom->conn);
730 731
    int i;
    unsigned long ret;
732

733 734
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->domainGetMaxMemory) {
735 736 737
            ret = drivers[i]->domainGetMaxMemory (dom);
            if (ret != 0) return ret;
        }
738

739
    return 0;
740 741 742 743 744
}

static int
xenUnifiedDomainSetMaxMemory (virDomainPtr dom, unsigned long memory)
{
745
    GET_PRIVATE(dom->conn);
746
    int i;
747

748 749 750
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] &&
            drivers[i]->domainSetMaxMemory &&
751 752
            drivers[i]->domainSetMaxMemory (dom, memory) == 0)
            return 0;
753

754
    return -1;
755 756 757 758 759
}

static int
xenUnifiedDomainSetMemory (virDomainPtr dom, unsigned long memory)
{
760
    GET_PRIVATE(dom->conn);
761
    int i;
762

763 764 765
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] &&
            drivers[i]->domainSetMemory &&
766 767
            drivers[i]->domainSetMemory (dom, memory) == 0)
            return 0;
768

769
    return -1;
770 771 772 773 774
}

static int
xenUnifiedDomainGetInfo (virDomainPtr dom, virDomainInfoPtr info)
{
775
    GET_PRIVATE(dom->conn);
776
    int i;
777

778 779 780
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] &&
            drivers[i]->domainGetInfo &&
781 782
            drivers[i]->domainGetInfo (dom, info) == 0)
            return 0;
783

784
    return -1;
785 786 787 788 789
}

static int
xenUnifiedDomainSave (virDomainPtr dom, const char *to)
{
790
    GET_PRIVATE(dom->conn);
791
    int i;
792

793 794 795
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] &&
            drivers[i]->domainSave &&
796 797
            drivers[i]->domainSave (dom, to) == 0)
            return 0;
798

799
    return -1;
800 801 802 803 804
}

static int
xenUnifiedDomainRestore (virConnectPtr conn, const char *from)
{
805
    GET_PRIVATE(conn);
806
    int i;
807

808 809 810
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] &&
            drivers[i]->domainRestore &&
811 812
            drivers[i]->domainRestore (conn, from) == 0)
            return 0;
813

814
    return -1;
815 816 817 818 819
}

static int
xenUnifiedDomainCoreDump (virDomainPtr dom, const char *to, int flags)
{
820
    GET_PRIVATE(dom->conn);
821
    int i;
822

823 824 825
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] &&
            drivers[i]->domainCoreDump &&
826 827
            drivers[i]->domainCoreDump (dom, to, flags) == 0)
            return 0;
828

829
    return -1;
830 831 832 833 834
}

static int
xenUnifiedDomainSetVcpus (virDomainPtr dom, unsigned int nvcpus)
{
835
    GET_PRIVATE(dom->conn);
836
    int i;
837

838 839 840
    /* Try non-hypervisor methods first, then hypervisor direct method
     * as a last resort.
     */
841
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
842
        if (i != XEN_UNIFIED_HYPERVISOR_OFFSET &&
843
            priv->opened[i] &&
844 845 846
            drivers[i]->domainSetVcpus &&
            drivers[i]->domainSetVcpus (dom, nvcpus) == 0)
            return 0;
847

848 849 850
    if (priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET] &&
        drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->domainSetVcpus &&
        drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->domainSetVcpus (dom, nvcpus) == 0)
851
        return 0;
852

853
    return -1;
854 855 856 857
}

static int
xenUnifiedDomainPinVcpu (virDomainPtr dom, unsigned int vcpu,
858
                         unsigned char *cpumap, int maplen)
859
{
860
    GET_PRIVATE(dom->conn);
861
    int i;
862

863 864 865
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] &&
            drivers[i]->domainPinVcpu &&
866 867
            drivers[i]->domainPinVcpu (dom, vcpu, cpumap, maplen) == 0)
            return 0;
868

869
    return -1;
870 871 872 873
}

static int
xenUnifiedDomainGetVcpus (virDomainPtr dom,
874 875
                          virVcpuInfoPtr info, int maxinfo,
                          unsigned char *cpumaps, int maplen)
876
{
877
    GET_PRIVATE(dom->conn);
878
    int i, ret;
879

880 881
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->domainGetVcpus) {
882 883 884 885
            ret = drivers[i]->domainGetVcpus (dom, info, maxinfo, cpumaps, maplen);
            if (ret > 0)
                return ret;
        }
886
    return -1;
887 888 889 890 891
}

static int
xenUnifiedDomainGetMaxVcpus (virDomainPtr dom)
{
892
    GET_PRIVATE(dom->conn);
893
    int i, ret;
894

895 896
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->domainGetMaxVcpus) {
897 898 899
            ret = drivers[i]->domainGetMaxVcpus (dom);
            if (ret != 0) return ret;
        }
900

901
    return -1;
902 903 904 905 906
}

static char *
xenUnifiedDomainDumpXML (virDomainPtr dom, int flags)
{
907
    GET_PRIVATE(dom->conn);
908

909 910 911 912 913 914 915 916 917 918 919
    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);
	    if (cpus != NULL)
	        free(cpus);
	    return(res);
920
        }
921 922 923
        if (priv->opened[XEN_UNIFIED_PROXY_OFFSET])
            return xenProxyDomainDumpXML(dom, flags);
    } 
924

925
    xenUnifiedError (dom->conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
926
    return NULL;
927 928
}

929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979
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);
}

980 981
static int
xenUnifiedListDefinedDomains (virConnectPtr conn, char **const names,
982
                              int maxnames)
983
{
984
    GET_PRIVATE(conn);
985 986
    int i;
    int ret;
987

988 989
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->listDefinedDomains) {
990 991 992
            ret = drivers[i]->listDefinedDomains (conn, names, maxnames);
            if (ret >= 0) return ret;
        }
993

994
    return -1;
995 996 997 998 999
}

static int
xenUnifiedNumOfDefinedDomains (virConnectPtr conn)
{
1000
    GET_PRIVATE(conn);
1001 1002
    int i;
    int ret;
1003

1004 1005
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->numOfDefinedDomains) {
1006 1007 1008
            ret = drivers[i]->numOfDefinedDomains (conn);
            if (ret >= 0) return ret;
        }
1009

1010
    return -1;
1011 1012 1013 1014 1015
}

static int
xenUnifiedDomainCreate (virDomainPtr dom)
{
1016
    GET_PRIVATE(dom->conn);
1017
    int i;
1018

1019 1020
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->domainCreate &&
1021 1022
            drivers[i]->domainCreate (dom) == 0)
            return 0;
1023

1024
    return -1;
1025 1026 1027 1028 1029
}

static virDomainPtr
xenUnifiedDomainDefineXML (virConnectPtr conn, const char *xml)
{
1030
    GET_PRIVATE(conn);
1031 1032
    int i;
    virDomainPtr ret;
1033

1034 1035
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->domainDefineXML) {
1036 1037 1038
            ret = drivers[i]->domainDefineXML (conn, xml);
            if (ret) return ret;
        }
1039

1040
    return NULL;
1041 1042 1043 1044 1045
}

static int
xenUnifiedDomainUndefine (virDomainPtr dom)
{
1046
    GET_PRIVATE(dom->conn);
1047
    int i;
1048

1049 1050
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->domainUndefine &&
1051 1052
            drivers[i]->domainUndefine (dom) == 0)
            return 0;
1053

1054
    return -1;
1055 1056 1057
}

static int
1058
xenUnifiedDomainAttachDevice (virDomainPtr dom, const char *xml)
1059
{
1060
    GET_PRIVATE(dom->conn);
1061
    int i;
1062

1063 1064
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->domainAttachDevice &&
1065 1066
            drivers[i]->domainAttachDevice (dom, xml) == 0)
            return 0;
1067

1068
    return -1;
1069 1070 1071
}

static int
1072
xenUnifiedDomainDetachDevice (virDomainPtr dom, const char *xml)
1073
{
1074
    GET_PRIVATE(dom->conn);
1075
    int i;
1076

1077 1078
    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
        if (priv->opened[i] && drivers[i]->domainDetachDevice &&
1079 1080
            drivers[i]->domainDetachDevice (dom, xml) == 0)
            return 0;
1081

1082
    return -1;
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 1131 1132 1133 1134 1135 1136
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);
}

1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162
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;
}

1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176
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;
}

1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195
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);
}

1196 1197
/*----- Register with libvirt.c, and initialise Xen drivers. -----*/

1198 1199 1200
#define HV_VERSION ((DOM0_INTERFACE_VERSION >> 24) * 1000000 +         \
                    ((DOM0_INTERFACE_VERSION >> 16) & 0xFF) * 1000 +   \
                    (DOM0_INTERFACE_VERSION & 0xFFFF))
1201 1202 1203

/* The interface which we export upwards to libvirt.c. */
static virDriver xenUnifiedDriver = {
1204
    .no = VIR_DRV_XEN_UNIFIED,
1205
    .name = "Xen",
1206
    .ver = HV_VERSION,
1207 1208
    .open 			= xenUnifiedOpen,
    .close 			= xenUnifiedClose,
1209
    .supports_feature   = xenUnifiedSupportsFeature,
1210 1211
    .type 			= xenUnifiedType,
    .version 			= xenUnifiedVersion,
1212
    .getHostname    = xenUnifiedGetHostname,
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 1245 1246
    .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,
1247 1248 1249
    .domainGetSchedulerType	= xenUnifiedDomainGetSchedulerType,
    .domainGetSchedulerParameters	= xenUnifiedDomainGetSchedulerParameters,
    .domainSetSchedulerParameters	= xenUnifiedDomainSetSchedulerParameters,
1250 1251 1252
    .domainMigratePrepare		= xenUnifiedDomainMigratePrepare,
    .domainMigratePerform		= xenUnifiedDomainMigratePerform,
    .domainMigrateFinish		= xenUnifiedDomainMigrateFinish,
1253 1254
    .domainBlockStats	= xenUnifiedDomainBlockStats,
    .domainInterfaceStats = xenUnifiedDomainInterfaceStats,
1255
    .nodeGetCellsFreeMemory = xenUnifiedNodeGetCellsFreeMemory,
1256
    .getFreeMemory = xenUnifiedNodeGetFreeMemory,
1257 1258
};

1259 1260 1261 1262 1263 1264 1265
/**
 * xenUnifiedRegister:
 *
 * Register xen related drivers
 *
 * Returns the driver priority or -1 in case of error.
 */
1266 1267 1268
int
xenUnifiedRegister (void)
{
1269 1270 1271 1272 1273 1274
    /* Ignore failures here. */
    (void) xenHypervisorInit ();
    (void) xenProxyInit ();
    (void) xenDaemonInit ();
    (void) xenStoreInit ();
    (void) xenXMInit ();
1275

1276
    return virRegisterDriver (&xenUnifiedDriver);
1277 1278 1279
}

#endif /* WITH_XEN */
1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293

/*
 * 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:
 */