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libvirt/src/xen_unified.c

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/*
* xen_unified.c: Unified Xen driver.
*
* Copyright (C) 2007, 2008 Red Hat, Inc.
*
* See COPYING.LIB for the License of this software
*
* Richard W.M. Jones <rjones@redhat.com>
*/
#include <config.h>
/* 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>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <xen/dom0_ops.h>
#include <libxml/uri.h>
#include "virterror_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"
#include "xml.h"
#include "util.h"
#include "memory.h"
static int
xenUnifiedNodeGetInfo (virConnectPtr conn, virNodeInfoPtr info);
static int
xenUnifiedDomainGetMaxVcpus (virDomainPtr dom);
static int
xenUnifiedDomainGetVcpus (virDomainPtr dom,
virVcpuInfoPtr info, int maxinfo,
unsigned char *cpumaps, int maplen);
/* The five Xen drivers below us. */
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,
};
#define xenUnifiedError(conn, code, fmt...) \
virReportErrorHelper(conn, VIR_FROM_XEN, code, __FILE__, \
__FUNCTION__, __LINE__, fmt)
/*
* 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 number 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
*
* Number of CPUs present in the actual Node
*
* Returns the number of CPUs available on that Node
*/
int xenNbCpus(virConnectPtr conn) {
if (nbNodeCpus < 0)
xenNumaInit(conn);
return(nbNodeCpus);
}
/**
* 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);
if (VIR_ALLOC_N(cpulist, nb_cpu) < 0)
goto done;
if (VIR_ALLOC_N(cpuinfo, nb_vcpu) < 0)
goto done;
cpumaplen = VIR_CPU_MAPLEN(VIR_NODEINFO_MAXCPUS(nodeinfo));
if (xalloc_oversized(nb_vcpu, cpumaplen) ||
VIR_ALLOC_N(cpumap, nb_vcpu * cpumaplen) < 0)
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 = virDomainCpuSetFormat(dom->conn, cpulist, nb_cpu);
}
done:
VIR_FREE(cpulist);
VIR_FREE(cpumap);
VIR_FREE(cpuinfo);
return(res);
}
/*----- 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 const char *
xenUnifiedProbe (void)
{
#ifdef __linux__
if (virFileExists("/proc/xen"))
return("xen:///");
#endif
#ifdef __sun__
FILE *fh;
if (fh = fopen("/dev/xen/domcaps", "r")) {
fclose(fh);
return("xen:///");
}
#endif
return(NULL);
}
static int
xenUnifiedOpen (virConnectPtr conn, xmlURIPtr uri, virConnectAuthPtr auth, int flags)
{
int i, ret = VIR_DRV_OPEN_DECLINED;
xenUnifiedPrivatePtr priv;
/* Refuse any scheme which isn't "xen://" or "http://". */
if (uri->scheme &&
STRCASENEQ(uri->scheme, "xen") &&
STRCASENEQ(uri->scheme, "http"))
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.
*/
if (!uri->scheme && (!uri->path || uri->path[0] != '/'))
return VIR_DRV_OPEN_DECLINED;
/* Refuse any xen:// URI with a server specified - allow remote to do it */
if (uri->scheme && STRCASEEQ(uri->scheme, "xen") && uri->server)
return VIR_DRV_OPEN_DECLINED;
/* Allocate per-connection private data. */
if (VIR_ALLOC(priv) < 0) {
xenUnifiedError (NULL, VIR_ERR_NO_MEMORY, "allocating private data");
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;
/* Hypervisor is only run as root & required to succeed */
if (getuid() == 0) {
DEBUG0("Trying hypervisor sub-driver");
if (drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->open(conn, uri, auth, flags) ==
VIR_DRV_OPEN_SUCCESS) {
DEBUG0("Activated hypervisor sub-driver");
priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET] = 1;
}
}
/* XenD is required to suceed if root.
* If it fails as non-root, then the proxy driver may take over
*/
DEBUG0("Trying XenD sub-driver");
if (drivers[XEN_UNIFIED_XEND_OFFSET]->open(conn, uri, auth, flags) ==
VIR_DRV_OPEN_SUCCESS) {
DEBUG0("Activated XenD sub-driver");
priv->opened[XEN_UNIFIED_XEND_OFFSET] = 1;
/* XenD is active, so try the xm & xs drivers too, both requird to
* succeed if root, optional otherwise */
if (priv->xendConfigVersion <= 2) {
DEBUG0("Trying XM sub-driver");
if (drivers[XEN_UNIFIED_XM_OFFSET]->open(conn, uri, auth, flags) ==
VIR_DRV_OPEN_SUCCESS) {
DEBUG0("Activated XM sub-driver");
priv->opened[XEN_UNIFIED_XM_OFFSET] = 1;
}
}
DEBUG0("Trying XS sub-driver");
if (drivers[XEN_UNIFIED_XS_OFFSET]->open(conn, uri, auth, flags) ==
VIR_DRV_OPEN_SUCCESS) {
DEBUG0("Activated XS sub-driver");
priv->opened[XEN_UNIFIED_XS_OFFSET] = 1;
} else {
if (getuid() == 0)
goto fail; /* XS is mandatory as root */
}
} else {
if (getuid() == 0) {
goto fail; /* XenD is mandatory as root */
} else {
#if WITH_PROXY
DEBUG0("Trying proxy sub-driver");
if (drivers[XEN_UNIFIED_PROXY_OFFSET]->open(conn, uri, auth, flags) ==
VIR_DRV_OPEN_SUCCESS) {
DEBUG0("Activated proxy sub-driver");
priv->opened[XEN_UNIFIED_PROXY_OFFSET] = 1;
} else {
goto fail; /* Proxy is mandatory if XenD failed */
}
#else
DEBUG0("Handing off for remote driver");
ret = VIR_DRV_OPEN_DECLINED; /* Let remote_driver try instead */
goto clean;
#endif
}
}
if (!(priv->caps = xenHypervisorMakeCapabilities(conn))) {
DEBUG0("Failed to make capabilities");
goto fail;
}
return VIR_DRV_OPEN_SUCCESS;
fail:
ret = VIR_DRV_OPEN_ERROR;
#ifndef WITH_PROXY
clean:
#endif
DEBUG0("Failed to activate a mandatory sub-driver");
for (i = 0 ; i < XEN_UNIFIED_NR_DRIVERS ; i++)
if (priv->opened[i]) drivers[i]->close(conn);
VIR_FREE(priv);
return ret;
}
#define GET_PRIVATE(conn) \
xenUnifiedPrivatePtr priv = (xenUnifiedPrivatePtr) (conn)->privateData
static int
xenUnifiedClose (virConnectPtr conn)
{
GET_PRIVATE(conn);
int i;
virCapabilitiesFree(priv->caps);
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->close)
(void) drivers[i]->close (conn);
free (conn->privateData);
conn->privateData = NULL;
return 0;
}
static const char *
xenUnifiedType (virConnectPtr conn)
{
GET_PRIVATE(conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i])
return "Xen";
return NULL;
}
/* 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;
}
}
static int
xenUnifiedVersion (virConnectPtr conn, unsigned long *hvVer)
{
GET_PRIVATE(conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->version &&
drivers[i]->version (conn, hvVer) == 0)
return 0;
return -1;
}
/* 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, "%s", strerror(errno));
return NULL;
}
str = strdup (hostname);
if (str == NULL) {
xenUnifiedError (conn, VIR_ERR_SYSTEM_ERROR, "%s", strerror(errno));
return NULL;
}
return str;
}
static int
xenUnifiedGetMaxVcpus (virConnectPtr conn, const char *type)
{
GET_PRIVATE(conn);
if (type && STRCASENEQ (type, "Xen")) {
xenUnifiedError (conn, VIR_ERR_INVALID_ARG, __FUNCTION__);
return -1;
}
if (priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET])
return xenHypervisorGetMaxVcpus (conn, type);
else {
xenUnifiedError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
return -1;
}
}
static int
xenUnifiedNodeGetInfo (virConnectPtr conn, virNodeInfoPtr info)
{
GET_PRIVATE(conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->nodeGetInfo &&
drivers[i]->nodeGetInfo (conn, info) == 0)
return 0;
return -1;
}
static char *
xenUnifiedGetCapabilities (virConnectPtr conn)
{
GET_PRIVATE(conn);
int i;
char *ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->getCapabilities) {
ret = drivers[i]->getCapabilities (conn);
if (ret) return ret;
}
return NULL;
}
static int
xenUnifiedListDomains (virConnectPtr conn, int *ids, int maxids)
{
GET_PRIVATE(conn);
int i, ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->listDomains) {
ret = drivers[i]->listDomains (conn, ids, maxids);
if (ret >= 0) return ret;
}
return -1;
}
static int
xenUnifiedNumOfDomains (virConnectPtr conn)
{
GET_PRIVATE(conn);
int i, ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->numOfDomains) {
ret = drivers[i]->numOfDomains (conn);
if (ret >= 0) return ret;
}
return -1;
}
static virDomainPtr
xenUnifiedDomainCreateXML (virConnectPtr conn,
const char *xmlDesc, unsigned int flags)
{
GET_PRIVATE(conn);
int i;
virDomainPtr ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainCreateXML) {
ret = drivers[i]->domainCreateXML (conn, xmlDesc, flags);
if (ret) return ret;
}
return NULL;
}
/* 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.
*/
static virDomainPtr
xenUnifiedDomainLookupByID (virConnectPtr conn, int id)
{
GET_PRIVATE(conn);
virDomainPtr ret;
/* Reset any connection-level errors in virterror first, in case
* there is one hanging around from a previous call.
*/
virConnResetLastError (conn);
/* 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;
}
/* 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;
}
/* Not found. */
xenUnifiedError (conn, VIR_ERR_NO_DOMAIN, __FUNCTION__);
return NULL;
}
static virDomainPtr
xenUnifiedDomainLookupByUUID (virConnectPtr conn,
const unsigned char *uuid)
{
GET_PRIVATE(conn);
virDomainPtr ret;
/* Reset any connection-level errors in virterror first, in case
* there is one hanging around from a previous call.
*/
virConnResetLastError (conn);
/* 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;
}
/* 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;
}
/* 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__);
return NULL;
}
static virDomainPtr
xenUnifiedDomainLookupByName (virConnectPtr conn,
const char *name)
{
GET_PRIVATE(conn);
virDomainPtr ret;
/* 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;
}
/* Not found. */
xenUnifiedError (conn, VIR_ERR_NO_DOMAIN, __FUNCTION__);
return NULL;
}
static int
xenUnifiedDomainSuspend (virDomainPtr dom)
{
GET_PRIVATE(dom->conn);
int i;
/* Try non-hypervisor methods first, then hypervisor direct method
* as a last resort.
*/
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (i != XEN_UNIFIED_HYPERVISOR_OFFSET &&
priv->opened[i] &&
drivers[i]->domainSuspend &&
drivers[i]->domainSuspend (dom) == 0)
return 0;
if (priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET] &&
drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->domainSuspend &&
drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->domainSuspend (dom) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainResume (virDomainPtr dom)
{
GET_PRIVATE(dom->conn);
int i;
/* Try non-hypervisor methods first, then hypervisor direct method
* as a last resort.
*/
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (i != XEN_UNIFIED_HYPERVISOR_OFFSET &&
priv->opened[i] &&
drivers[i]->domainResume &&
drivers[i]->domainResume (dom) == 0)
return 0;
if (priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET] &&
drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->domainResume &&
drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->domainResume (dom) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainShutdown (virDomainPtr dom)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->domainShutdown &&
drivers[i]->domainShutdown (dom) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainReboot (virDomainPtr dom, unsigned int flags)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->domainReboot &&
drivers[i]->domainReboot (dom, flags) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainDestroy (virDomainPtr dom)
{
GET_PRIVATE(dom->conn);
int i;
/* Try non-hypervisor methods first, then hypervisor direct method
* as a last resort.
*/
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (i != XEN_UNIFIED_HYPERVISOR_OFFSET &&
priv->opened[i] &&
drivers[i]->domainDestroy &&
drivers[i]->domainDestroy (dom) == 0)
return 0;
if (priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET] &&
drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->domainDestroy &&
drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->domainDestroy (dom) == 0)
return 0;
return -1;
}
static char *
xenUnifiedDomainGetOSType (virDomainPtr dom)
{
GET_PRIVATE(dom->conn);
int i;
char *ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainGetOSType) {
ret = drivers[i]->domainGetOSType (dom);
if (ret) return ret;
}
return NULL;
}
static unsigned long
xenUnifiedDomainGetMaxMemory (virDomainPtr dom)
{
GET_PRIVATE(dom->conn);
int i;
unsigned long ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainGetMaxMemory) {
ret = drivers[i]->domainGetMaxMemory (dom);
if (ret != 0) return ret;
}
return 0;
}
static int
xenUnifiedDomainSetMaxMemory (virDomainPtr dom, unsigned long memory)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->domainSetMaxMemory &&
drivers[i]->domainSetMaxMemory (dom, memory) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainSetMemory (virDomainPtr dom, unsigned long memory)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->domainSetMemory &&
drivers[i]->domainSetMemory (dom, memory) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainGetInfo (virDomainPtr dom, virDomainInfoPtr info)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->domainGetInfo &&
drivers[i]->domainGetInfo (dom, info) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainSave (virDomainPtr dom, const char *to)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->domainSave &&
drivers[i]->domainSave (dom, to) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainRestore (virConnectPtr conn, const char *from)
{
GET_PRIVATE(conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->domainRestore &&
drivers[i]->domainRestore (conn, from) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainCoreDump (virDomainPtr dom, const char *to, int flags)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->domainCoreDump &&
drivers[i]->domainCoreDump (dom, to, flags) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainSetVcpus (virDomainPtr dom, unsigned int nvcpus)
{
GET_PRIVATE(dom->conn);
int i;
/* Try non-hypervisor methods first, then hypervisor direct method
* as a last resort.
*/
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (i != XEN_UNIFIED_HYPERVISOR_OFFSET &&
priv->opened[i] &&
drivers[i]->domainSetVcpus &&
drivers[i]->domainSetVcpus (dom, nvcpus) == 0)
return 0;
if (priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET] &&
drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->domainSetVcpus &&
drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->domainSetVcpus (dom, nvcpus) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainPinVcpu (virDomainPtr dom, unsigned int vcpu,
unsigned char *cpumap, int maplen)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] &&
drivers[i]->domainPinVcpu &&
drivers[i]->domainPinVcpu (dom, vcpu, cpumap, maplen) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainGetVcpus (virDomainPtr dom,
virVcpuInfoPtr info, int maxinfo,
unsigned char *cpumaps, int maplen)
{
GET_PRIVATE(dom->conn);
int i, ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainGetVcpus) {
ret = drivers[i]->domainGetVcpus (dom, info, maxinfo, cpumaps, maplen);
if (ret > 0)
return ret;
}
return -1;
}
static int
xenUnifiedDomainGetMaxVcpus (virDomainPtr dom)
{
GET_PRIVATE(dom->conn);
int i, ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainGetMaxVcpus) {
ret = drivers[i]->domainGetMaxVcpus (dom);
if (ret != 0) return ret;
}
return -1;
}
static char *
xenUnifiedDomainDumpXML (virDomainPtr dom, int flags)
{
GET_PRIVATE(dom->conn);
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);
VIR_FREE(cpus);
return(res);
}
if (priv->opened[XEN_UNIFIED_PROXY_OFFSET])
return xenProxyDomainDumpXML(dom, flags);
}
xenUnifiedError (dom->conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
return NULL;
}
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);
}
static int
xenUnifiedListDefinedDomains (virConnectPtr conn, char **const names,
int maxnames)
{
GET_PRIVATE(conn);
int i;
int ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->listDefinedDomains) {
ret = drivers[i]->listDefinedDomains (conn, names, maxnames);
if (ret >= 0) return ret;
}
return -1;
}
static int
xenUnifiedNumOfDefinedDomains (virConnectPtr conn)
{
GET_PRIVATE(conn);
int i;
int ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->numOfDefinedDomains) {
ret = drivers[i]->numOfDefinedDomains (conn);
if (ret >= 0) return ret;
}
return -1;
}
static int
xenUnifiedDomainCreate (virDomainPtr dom)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainCreate &&
drivers[i]->domainCreate (dom) == 0)
return 0;
return -1;
}
static virDomainPtr
xenUnifiedDomainDefineXML (virConnectPtr conn, const char *xml)
{
GET_PRIVATE(conn);
int i;
virDomainPtr ret;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainDefineXML) {
ret = drivers[i]->domainDefineXML (conn, xml);
if (ret) return ret;
}
return NULL;
}
static int
xenUnifiedDomainUndefine (virDomainPtr dom)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainUndefine &&
drivers[i]->domainUndefine (dom) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainAttachDevice (virDomainPtr dom, const char *xml)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainAttachDevice &&
drivers[i]->domainAttachDevice (dom, xml) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainDetachDevice (virDomainPtr dom, const char *xml)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainDetachDevice &&
drivers[i]->domainDetachDevice (dom, xml) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainGetAutostart (virDomainPtr dom, int *autostart)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainGetAutostart &&
drivers[i]->domainGetAutostart (dom, autostart) == 0)
return 0;
return -1;
}
static int
xenUnifiedDomainSetAutostart (virDomainPtr dom, int autostart)
{
GET_PRIVATE(dom->conn);
int i;
for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
if (priv->opened[i] && drivers[i]->domainSetAutostart &&
drivers[i]->domainSetAutostart (dom, autostart) == 0)
return 0;
return -1;
}
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);
}
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;
}
static int
xenUnifiedDomainBlockPeek (virDomainPtr dom, const char *path,
unsigned long long offset, size_t size,
void *buffer, unsigned int flags ATTRIBUTE_UNUSED)
{
int r;
GET_PRIVATE (dom->conn);
if (priv->opened[XEN_UNIFIED_XEND_OFFSET]) {
r = xenDaemonDomainBlockPeek (dom, path, offset, size, buffer);
if (r != -2) return r;
/* r == -2 means declined, so fall through to XM driver ... */
}
if (priv->opened[XEN_UNIFIED_XM_OFFSET]) {
if (xenXMDomainBlockPeek (dom, path, offset, size, buffer) == 0)
return 0;
}
xenUnifiedError (dom->conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
return -1;
}
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;
}
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);
}
/*----- Register with libvirt.c, and initialise Xen drivers. -----*/
#define HV_VERSION ((DOM0_INTERFACE_VERSION >> 24) * 1000000 + \
((DOM0_INTERFACE_VERSION >> 16) & 0xFF) * 1000 + \
(DOM0_INTERFACE_VERSION & 0xFFFF))
/* The interface which we export upwards to libvirt.c. */
static virDriver xenUnifiedDriver = {
.no = VIR_DRV_XEN_UNIFIED,
.name = "Xen",
.ver = HV_VERSION,
.probe = xenUnifiedProbe,
.open = xenUnifiedOpen,
.close = xenUnifiedClose,
.supports_feature = xenUnifiedSupportsFeature,
.type = xenUnifiedType,
.version = xenUnifiedVersion,
.getHostname = xenUnifiedGetHostname,
.getMaxVcpus = xenUnifiedGetMaxVcpus,
.nodeGetInfo = xenUnifiedNodeGetInfo,
.getCapabilities = xenUnifiedGetCapabilities,
.listDomains = xenUnifiedListDomains,
.numOfDomains = xenUnifiedNumOfDomains,
.domainCreateXML = xenUnifiedDomainCreateXML,
.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,
.domainGetAutostart = xenUnifiedDomainGetAutostart,
.domainSetAutostart = xenUnifiedDomainSetAutostart,
.domainGetSchedulerType = xenUnifiedDomainGetSchedulerType,
.domainGetSchedulerParameters = xenUnifiedDomainGetSchedulerParameters,
.domainSetSchedulerParameters = xenUnifiedDomainSetSchedulerParameters,
.domainMigratePrepare = xenUnifiedDomainMigratePrepare,
.domainMigratePerform = xenUnifiedDomainMigratePerform,
.domainMigrateFinish = xenUnifiedDomainMigrateFinish,
.domainBlockStats = xenUnifiedDomainBlockStats,
.domainInterfaceStats = xenUnifiedDomainInterfaceStats,
.domainBlockPeek = xenUnifiedDomainBlockPeek,
.nodeGetCellsFreeMemory = xenUnifiedNodeGetCellsFreeMemory,
.getFreeMemory = xenUnifiedNodeGetFreeMemory,
};
/**
* xenUnifiedRegister:
*
* Register xen related drivers
*
* Returns the driver priority or -1 in case of error.
*/
int
xenUnifiedRegister (void)
{
/* Ignore failures here. */
(void) xenHypervisorInit ();
(void) xenXMInit ();
return virRegisterDriver (&xenUnifiedDriver);
}
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