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libvirt/src/libxl/libxl_domain.c
Peter Krempa 185d13b1b0 conf: refactor checking for unsupported memory devices 
Introduce a helper to check supported device and domain config and move
the memory hotplug checks to it.

The advantage of this approach is that by default all new features are
considered unsupported by all hypervisors unless specifically changed
rather than the previous approach where every hypervisor would need to
declare that a given feature is unsupported.
2016-03-09 10:09:16 +01:00

1190 lines
36 KiB
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/*
* libxl_domain.c: libxl domain object private state
*
* Copyright (C) 2011-2015 SUSE LINUX Products GmbH, Nuernberg, Germany.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
* Authors:
* Jim Fehlig <jfehlig@suse.com>
*/
#include <config.h>
#include <fcntl.h>
#include "libxl_domain.h"
#include "viralloc.h"
#include "viratomic.h"
#include "virfile.h"
#include "virerror.h"
#include "virlog.h"
#include "virstring.h"
#include "virtime.h"
#include "locking/domain_lock.h"
#include "xen_common.h"
#define VIR_FROM_THIS VIR_FROM_LIBXL
VIR_LOG_INIT("libxl.libxl_domain");
VIR_ENUM_IMPL(libxlDomainJob, LIBXL_JOB_LAST,
"none",
"query",
"destroy",
"modify",
);
static virClassPtr libxlDomainObjPrivateClass;
static void
libxlDomainObjPrivateDispose(void *obj);
static int
libxlDomainObjPrivateOnceInit(void)
{
if (!(libxlDomainObjPrivateClass = virClassNew(virClassForObjectLockable(),
"libxlDomainObjPrivate",
sizeof(libxlDomainObjPrivate),
libxlDomainObjPrivateDispose)))
return -1;
return 0;
}
VIR_ONCE_GLOBAL_INIT(libxlDomainObjPrivate)
static int
libxlDomainObjInitJob(libxlDomainObjPrivatePtr priv)
{
memset(&priv->job, 0, sizeof(priv->job));
if (virCondInit(&priv->job.cond) < 0)
return -1;
if (VIR_ALLOC(priv->job.current) < 0)
return -1;
return 0;
}
static void
libxlDomainObjResetJob(libxlDomainObjPrivatePtr priv)
{
struct libxlDomainJobObj *job = &priv->job;
job->active = LIBXL_JOB_NONE;
job->owner = 0;
}
static void
libxlDomainObjFreeJob(libxlDomainObjPrivatePtr priv)
{
ignore_value(virCondDestroy(&priv->job.cond));
VIR_FREE(priv->job.current);
}
/* Give up waiting for mutex after 30 seconds */
#define LIBXL_JOB_WAIT_TIME (1000ull * 30)
/*
* obj must be locked before calling, libxlDriverPrivatePtr must NOT be locked
*
* This must be called by anything that will change the VM state
* in any way
*
* Upon successful return, the object will have its ref count increased,
* successful calls must be followed by EndJob eventually
*/
int
libxlDomainObjBeginJob(libxlDriverPrivatePtr driver ATTRIBUTE_UNUSED,
virDomainObjPtr obj,
enum libxlDomainJob job)
{
libxlDomainObjPrivatePtr priv = obj->privateData;
unsigned long long now;
unsigned long long then;
if (virTimeMillisNow(&now) < 0)
return -1;
then = now + LIBXL_JOB_WAIT_TIME;
virObjectRef(obj);
while (priv->job.active) {
VIR_DEBUG("Wait normal job condition for starting job: %s",
libxlDomainJobTypeToString(job));
if (virCondWaitUntil(&priv->job.cond, &obj->parent.lock, then) < 0)
goto error;
}
libxlDomainObjResetJob(priv);
VIR_DEBUG("Starting job: %s", libxlDomainJobTypeToString(job));
priv->job.active = job;
priv->job.owner = virThreadSelfID();
priv->job.started = now;
priv->job.current->type = VIR_DOMAIN_JOB_UNBOUNDED;
return 0;
error:
VIR_WARN("Cannot start job (%s) for domain %s;"
" current job is (%s) owned by (%d)",
libxlDomainJobTypeToString(job),
obj->def->name,
libxlDomainJobTypeToString(priv->job.active),
priv->job.owner);
if (errno == ETIMEDOUT)
virReportError(VIR_ERR_OPERATION_TIMEOUT,
"%s", _("cannot acquire state change lock"));
else
virReportSystemError(errno,
"%s", _("cannot acquire job mutex"));
virObjectUnref(obj);
return -1;
}
/*
* obj must be locked before calling
*
* To be called after completing the work associated with the
* earlier libxlDomainBeginJob() call
*
* Returns true if the remaining reference count on obj is
* non-zero, false if the reference count has dropped to zero
* and obj is disposed.
*/
bool
libxlDomainObjEndJob(libxlDriverPrivatePtr driver ATTRIBUTE_UNUSED,
virDomainObjPtr obj)
{
libxlDomainObjPrivatePtr priv = obj->privateData;
enum libxlDomainJob job = priv->job.active;
VIR_DEBUG("Stopping job: %s",
libxlDomainJobTypeToString(job));
libxlDomainObjResetJob(priv);
virCondSignal(&priv->job.cond);
return virObjectUnref(obj);
}
int
libxlDomainJobUpdateTime(struct libxlDomainJobObj *job)
{
virDomainJobInfoPtr jobInfo = job->current;
unsigned long long now;
if (!job->started)
return 0;
if (virTimeMillisNow(&now) < 0)
return -1;
if (now < job->started) {
job->started = 0;
return 0;
}
jobInfo->timeElapsed = now - job->started;
return 0;
}
static void *
libxlDomainObjPrivateAlloc(void)
{
libxlDomainObjPrivatePtr priv;
if (libxlDomainObjPrivateInitialize() < 0)
return NULL;
if (!(priv = virObjectLockableNew(libxlDomainObjPrivateClass)))
return NULL;
if (!(priv->devs = virChrdevAlloc())) {
virObjectUnref(priv);
return NULL;
}
if (libxlDomainObjInitJob(priv) < 0) {
virChrdevFree(priv->devs);
virObjectUnref(priv);
return NULL;
}
return priv;
}
static void
libxlDomainObjPrivateDispose(void *obj)
{
libxlDomainObjPrivatePtr priv = obj;
libxlDomainObjFreeJob(priv);
virChrdevFree(priv->devs);
}
static void
libxlDomainObjPrivateFree(void *data)
{
libxlDomainObjPrivatePtr priv = data;
VIR_FREE(priv->lockState);
virObjectUnref(priv);
}
static int
libxlDomainObjPrivateXMLParse(xmlXPathContextPtr ctxt,
virDomainObjPtr vm,
virDomainDefParserConfigPtr config ATTRIBUTE_UNUSED)
{
libxlDomainObjPrivatePtr priv = vm->privateData;
priv->lockState = virXPathString("string(./lockstate)", ctxt);
return 0;
}
static int
libxlDomainObjPrivateXMLFormat(virBufferPtr buf,
virDomainObjPtr vm)
{
libxlDomainObjPrivatePtr priv = vm->privateData;
if (priv->lockState)
virBufferAsprintf(buf, "<lockstate>%s</lockstate>\n", priv->lockState);
return 0;
}
virDomainXMLPrivateDataCallbacks libxlDomainXMLPrivateDataCallbacks = {
.alloc = libxlDomainObjPrivateAlloc,
.free = libxlDomainObjPrivateFree,
.parse = libxlDomainObjPrivateXMLParse,
.format = libxlDomainObjPrivateXMLFormat,
};
static int
libxlDomainDeviceDefPostParse(virDomainDeviceDefPtr dev,
const virDomainDef *def,
virCapsPtr caps ATTRIBUTE_UNUSED,
unsigned int parseFlags ATTRIBUTE_UNUSED,
void *opaque ATTRIBUTE_UNUSED)
{
if (dev->type == VIR_DOMAIN_DEVICE_CHR &&
dev->data.chr->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_CONSOLE &&
dev->data.chr->targetType == VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_NONE &&
def->os.type != VIR_DOMAIN_OSTYPE_HVM)
dev->data.chr->targetType = VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_XEN;
if (dev->type == VIR_DOMAIN_DEVICE_NET &&
(dev->data.net->type == VIR_DOMAIN_NET_TYPE_BRIDGE ||
dev->data.net->type == VIR_DOMAIN_NET_TYPE_ETHERNET ||
dev->data.net->type == VIR_DOMAIN_NET_TYPE_NETWORK)) {
if (dev->data.net->nips > 1) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("multiple IP addresses not supported on device type %s"),
virDomainNetTypeToString(dev->data.net->type));
return -1;
}
}
if (dev->type == VIR_DOMAIN_DEVICE_HOSTDEV ||
(dev->type == VIR_DOMAIN_DEVICE_NET &&
dev->data.net->type == VIR_DOMAIN_NET_TYPE_HOSTDEV)) {
virDomainHostdevDefPtr hostdev;
virDomainHostdevSubsysPCIPtr pcisrc;
if (dev->type == VIR_DOMAIN_DEVICE_NET)
hostdev = &dev->data.net->data.hostdev.def;
else
hostdev = dev->data.hostdev;
pcisrc = &hostdev->source.subsys.u.pci;
/* forbid capabilities mode hostdev in this kind of hypervisor */
if (hostdev->mode == VIR_DOMAIN_HOSTDEV_MODE_CAPABILITIES) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("hostdev mode 'capabilities' is not "
"supported in %s"),
virDomainVirtTypeToString(def->virtType));
return -1;
}
if (hostdev->mode == VIR_DOMAIN_HOSTDEV_MODE_SUBSYS &&
hostdev->source.subsys.type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI &&
pcisrc->backend == VIR_DOMAIN_HOSTDEV_PCI_BACKEND_DEFAULT)
pcisrc->backend = VIR_DOMAIN_HOSTDEV_PCI_BACKEND_XEN;
}
if (dev->type == VIR_DOMAIN_DEVICE_VIDEO && def->os.type == VIR_DOMAIN_OSTYPE_HVM) {
int dm_type = libxlDomainGetEmulatorType(def);
switch (dev->data.video->type) {
case VIR_DOMAIN_VIDEO_TYPE_VGA:
case VIR_DOMAIN_VIDEO_TYPE_XEN:
if (dev->data.video->vram == 0) {
if (dm_type == LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN)
dev->data.video->vram = 16 * 1024;
else
dev->data.video->vram = 8 * 1024;
}
break;
case VIR_DOMAIN_VIDEO_TYPE_CIRRUS:
if (dev->data.video->vram == 0) {
if (dm_type == LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN)
dev->data.video->vram = 8 * 1024;
else
dev->data.video->vram = 4 * 1024;
}
break;
case VIR_DOMAIN_VIDEO_TYPE_QXL:
if (dev->data.video->vram == 0)
dev->data.video->vram = 128 * 1024;
break;
}
}
return 0;
}
static int
libxlDomainDefPostParse(virDomainDefPtr def,
virCapsPtr caps ATTRIBUTE_UNUSED,
unsigned int parseFlags ATTRIBUTE_UNUSED,
void *opaque ATTRIBUTE_UNUSED)
{
/* Xen PV domains always have a PV console, so add one to the domain config
* via post-parse callback if not explicitly specified in the XML. */
if (def->os.type != VIR_DOMAIN_OSTYPE_HVM && def->nconsoles == 0) {
virDomainChrDefPtr chrdef;
if (!(chrdef = virDomainChrDefNew()))
return -1;
chrdef->source.type = VIR_DOMAIN_CHR_TYPE_PTY;
chrdef->deviceType = VIR_DOMAIN_CHR_DEVICE_TYPE_CONSOLE;
chrdef->target.port = 0;
chrdef->targetType = VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_XEN;
if (VIR_ALLOC_N(def->consoles, 1) < 0) {
virDomainChrDefFree(chrdef);
return -1;
}
def->nconsoles = 1;
def->consoles[0] = chrdef;
}
/* add implicit input devices */
if (xenDomainDefAddImplicitInputDevice(def) < 0)
return -1;
return 0;
}
virDomainDefParserConfig libxlDomainDefParserConfig = {
.macPrefix = { 0x00, 0x16, 0x3e },
.devicesPostParseCallback = libxlDomainDeviceDefPostParse,
.domainPostParseCallback = libxlDomainDefPostParse,
};
struct libxlShutdownThreadInfo
{
libxlDriverPrivatePtr driver;
virDomainObjPtr vm;
libxl_event *event;
};
static void
libxlDomainShutdownThread(void *opaque)
{
struct libxlShutdownThreadInfo *shutdown_info = opaque;
virDomainObjPtr vm = shutdown_info->vm;
libxl_event *ev = shutdown_info->event;
libxlDriverPrivatePtr driver = shutdown_info->driver;
virObjectEventPtr dom_event = NULL;
libxl_shutdown_reason xl_reason = ev->u.domain_shutdown.shutdown_reason;
libxlDriverConfigPtr cfg;
cfg = libxlDriverConfigGet(driver);
if (libxlDomainObjBeginJob(driver, vm, LIBXL_JOB_MODIFY) < 0)
goto cleanup;
if (xl_reason == LIBXL_SHUTDOWN_REASON_POWEROFF) {
virDomainObjSetState(vm, VIR_DOMAIN_SHUTOFF,
VIR_DOMAIN_SHUTOFF_SHUTDOWN);
dom_event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_SHUTDOWN);
switch ((virDomainLifecycleAction) vm->def->onPoweroff) {
case VIR_DOMAIN_LIFECYCLE_DESTROY:
goto destroy;
case VIR_DOMAIN_LIFECYCLE_RESTART:
case VIR_DOMAIN_LIFECYCLE_RESTART_RENAME:
goto restart;
case VIR_DOMAIN_LIFECYCLE_PRESERVE:
case VIR_DOMAIN_LIFECYCLE_LAST:
goto endjob;
}
} else if (xl_reason == LIBXL_SHUTDOWN_REASON_CRASH) {
virDomainObjSetState(vm, VIR_DOMAIN_SHUTOFF,
VIR_DOMAIN_SHUTOFF_CRASHED);
dom_event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_CRASHED);
switch ((virDomainLifecycleCrashAction) vm->def->onCrash) {
case VIR_DOMAIN_LIFECYCLE_CRASH_DESTROY:
goto destroy;
case VIR_DOMAIN_LIFECYCLE_CRASH_RESTART:
case VIR_DOMAIN_LIFECYCLE_CRASH_RESTART_RENAME:
goto restart;
case VIR_DOMAIN_LIFECYCLE_CRASH_PRESERVE:
case VIR_DOMAIN_LIFECYCLE_CRASH_LAST:
goto endjob;
case VIR_DOMAIN_LIFECYCLE_CRASH_COREDUMP_DESTROY:
libxlDomainAutoCoreDump(driver, vm);
goto destroy;
case VIR_DOMAIN_LIFECYCLE_CRASH_COREDUMP_RESTART:
libxlDomainAutoCoreDump(driver, vm);
goto restart;
}
} else if (xl_reason == LIBXL_SHUTDOWN_REASON_REBOOT) {
virDomainObjSetState(vm, VIR_DOMAIN_SHUTOFF,
VIR_DOMAIN_SHUTOFF_SHUTDOWN);
dom_event = virDomainEventLifecycleNewFromObj(vm,
VIR_DOMAIN_EVENT_STOPPED,
VIR_DOMAIN_EVENT_STOPPED_SHUTDOWN);
switch ((virDomainLifecycleAction) vm->def->onReboot) {
case VIR_DOMAIN_LIFECYCLE_DESTROY:
goto destroy;
case VIR_DOMAIN_LIFECYCLE_RESTART:
case VIR_DOMAIN_LIFECYCLE_RESTART_RENAME:
goto restart;
case VIR_DOMAIN_LIFECYCLE_PRESERVE:
case VIR_DOMAIN_LIFECYCLE_LAST:
goto endjob;
}
} else {
VIR_INFO("Unhandled shutdown_reason %d", xl_reason);
goto endjob;
}
destroy:
if (dom_event) {
libxlDomainEventQueue(driver, dom_event);
dom_event = NULL;
}
libxlDomainDestroyInternal(driver, vm);
libxlDomainCleanup(driver, vm);
if (!vm->persistent)
virDomainObjListRemove(driver->domains, vm);
goto endjob;
restart:
if (dom_event) {
libxlDomainEventQueue(driver, dom_event);
dom_event = NULL;
}
libxlDomainDestroyInternal(driver, vm);
libxlDomainCleanup(driver, vm);
if (libxlDomainStart(driver, vm, false, -1) < 0) {
virErrorPtr err = virGetLastError();
VIR_ERROR(_("Failed to restart VM '%s': %s"),
vm->def->name, err ? err->message : _("unknown error"));
}
endjob:
if (!libxlDomainObjEndJob(driver, vm))
vm = NULL;
cleanup:
if (vm)
virObjectUnlock(vm);
if (dom_event)
libxlDomainEventQueue(driver, dom_event);
libxl_event_free(cfg->ctx, ev);
VIR_FREE(shutdown_info);
virObjectUnref(cfg);
}
/*
* Handle previously registered domain event notification from libxenlight.
*/
void
libxlDomainEventHandler(void *data, VIR_LIBXL_EVENT_CONST libxl_event *event)
{
libxlDriverPrivatePtr driver = data;
virDomainObjPtr vm = NULL;
libxl_shutdown_reason xl_reason = event->u.domain_shutdown.shutdown_reason;
struct libxlShutdownThreadInfo *shutdown_info = NULL;
virThread thread;
libxlDriverConfigPtr cfg;
if (event->type != LIBXL_EVENT_TYPE_DOMAIN_SHUTDOWN) {
VIR_INFO("Unhandled event type %d", event->type);
goto error;
}
/*
* Similar to the xl implementation, ignore SUSPEND. Any actions needed
* after calling libxl_domain_suspend() are handled by its callers.
*/
if (xl_reason == LIBXL_SHUTDOWN_REASON_SUSPEND)
goto error;
vm = virDomainObjListFindByID(driver->domains, event->domid);
if (!vm) {
VIR_INFO("Received event for unknown domain ID %d", event->domid);
goto error;
}
/*
* Start a thread to handle shutdown. We don't want to be tying up
* libxl's event machinery by doing a potentially lengthy shutdown.
*/
if (VIR_ALLOC(shutdown_info) < 0)
goto error;
shutdown_info->driver = driver;
shutdown_info->vm = vm;
shutdown_info->event = (libxl_event *)event;
if (virThreadCreate(&thread, false, libxlDomainShutdownThread,
shutdown_info) < 0) {
/*
* Not much we can do on error here except log it.
*/
VIR_ERROR(_("Failed to create thread to handle domain shutdown"));
goto error;
}
/*
* VM is unlocked and libxl_event freed in shutdown thread
*/
return;
error:
cfg = libxlDriverConfigGet(driver);
/* Cast away any const */
libxl_event_free(cfg->ctx, (libxl_event *)event);
virObjectUnref(cfg);
if (vm)
virObjectUnlock(vm);
VIR_FREE(shutdown_info);
}
void
libxlDomainEventQueue(libxlDriverPrivatePtr driver, virObjectEventPtr event)
{
virObjectEventStateQueue(driver->domainEventState, event);
}
char *
libxlDomainManagedSavePath(libxlDriverPrivatePtr driver, virDomainObjPtr vm)
{
char *ret;
libxlDriverConfigPtr cfg = libxlDriverConfigGet(driver);
ignore_value(virAsprintf(&ret, "%s/%s.save", cfg->saveDir, vm->def->name));
virObjectUnref(cfg);
return ret;
}
/*
* Open a saved image file and initialize domain definition from the header.
*
* Returns the opened fd on success, -1 on failure.
*/
int
libxlDomainSaveImageOpen(libxlDriverPrivatePtr driver,
libxlDriverConfigPtr cfg,
const char *from,
virDomainDefPtr *ret_def,
libxlSavefileHeaderPtr ret_hdr)
{
int fd;
virDomainDefPtr def = NULL;
libxlSavefileHeader hdr;
char *xml = NULL;
if ((fd = virFileOpenAs(from, O_RDONLY, 0, -1, -1, 0)) < 0) {
virReportSystemError(-fd,
_("Failed to open domain image file '%s'"), from);
goto error;
}
if (saferead(fd, &hdr, sizeof(hdr)) != sizeof(hdr)) {
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("failed to read libxl header"));
goto error;
}
if (memcmp(hdr.magic, LIBXL_SAVE_MAGIC, sizeof(hdr.magic))) {
virReportError(VIR_ERR_INVALID_ARG, "%s", _("image magic is incorrect"));
goto error;
}
if (hdr.version > LIBXL_SAVE_VERSION) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("image version is not supported (%d > %d)"),
hdr.version, LIBXL_SAVE_VERSION);
goto error;
}
if (hdr.xmlLen <= 0) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("invalid XML length: %d"), hdr.xmlLen);
goto error;
}
if (VIR_ALLOC_N(xml, hdr.xmlLen) < 0)
goto error;
if (saferead(fd, xml, hdr.xmlLen) != hdr.xmlLen) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s", _("failed to read XML"));
goto error;
}
if (!(def = virDomainDefParseString(xml, cfg->caps, driver->xmlopt,
VIR_DOMAIN_DEF_PARSE_INACTIVE)))
goto error;
VIR_FREE(xml);
*ret_def = def;
*ret_hdr = hdr;
return fd;
error:
VIR_FREE(xml);
virDomainDefFree(def);
VIR_FORCE_CLOSE(fd);
return -1;
}
/*
* Internal domain destroy function.
*
* virDomainObjPtr must be locked on invocation
*/
int
libxlDomainDestroyInternal(libxlDriverPrivatePtr driver,
virDomainObjPtr vm)
{
libxlDriverConfigPtr cfg = libxlDriverConfigGet(driver);
int ret = -1;
/* Unlock virDomainObj during destroy, which can take considerable
* time on large memory domains.
*/
virObjectUnlock(vm);
ret = libxl_domain_destroy(cfg->ctx, vm->def->id, NULL);
virObjectLock(vm);
virObjectUnref(cfg);
return ret;
}
/*
* Cleanup function for domain that has reached shutoff state.
*
* virDomainObjPtr must be locked on invocation
*/
void
libxlDomainCleanup(libxlDriverPrivatePtr driver,
virDomainObjPtr vm)
{
libxlDomainObjPrivatePtr priv = vm->privateData;
libxlDriverConfigPtr cfg = libxlDriverConfigGet(driver);
int vnc_port;
char *file;
virHostdevManagerPtr hostdev_mgr = driver->hostdevMgr;
virHostdevReAttachDomainDevices(hostdev_mgr, LIBXL_DRIVER_NAME,
vm->def, VIR_HOSTDEV_SP_PCI, NULL);
VIR_FREE(priv->lockState);
if (virDomainLockProcessPause(driver->lockManager, vm, &priv->lockState) < 0)
VIR_WARN("Unable to release lease on %s", vm->def->name);
VIR_DEBUG("Preserving lock state '%s'", NULLSTR(priv->lockState));
vm->def->id = -1;
if (priv->deathW) {
libxl_evdisable_domain_death(cfg->ctx, priv->deathW);
priv->deathW = NULL;
}
if (virAtomicIntDecAndTest(&driver->nactive) && driver->inhibitCallback)
driver->inhibitCallback(false, driver->inhibitOpaque);
if ((vm->def->ngraphics == 1) &&
vm->def->graphics[0]->type == VIR_DOMAIN_GRAPHICS_TYPE_VNC &&
vm->def->graphics[0]->data.vnc.autoport) {
vnc_port = vm->def->graphics[0]->data.vnc.port;
if (vnc_port >= LIBXL_VNC_PORT_MIN) {
if (virPortAllocatorRelease(driver->reservedGraphicsPorts,
vnc_port) < 0)
VIR_DEBUG("Could not mark port %d as unused", vnc_port);
}
}
if ((vm->def->nnets)) {
size_t i;
for (i = 0; i < vm->def->nnets; i++) {
virDomainNetDefPtr net = vm->def->nets[i];
if (net->ifname &&
STRPREFIX(net->ifname, LIBXL_GENERATED_PREFIX_XEN))
VIR_FREE(net->ifname);
}
}
if (virAsprintf(&file, "%s/%s.xml", cfg->stateDir, vm->def->name) > 0) {
if (unlink(file) < 0 && errno != ENOENT && errno != ENOTDIR)
VIR_DEBUG("Failed to remove domain XML for %s", vm->def->name);
VIR_FREE(file);
}
if (vm->newDef) {
virDomainDefFree(vm->def);
vm->def = vm->newDef;
vm->def->id = -1;
vm->newDef = NULL;
}
virObjectUnref(cfg);
}
/*
* Core dump domain to default dump path.
*
* virDomainObjPtr must be locked on invocation
*/
int
libxlDomainAutoCoreDump(libxlDriverPrivatePtr driver,
virDomainObjPtr vm)
{
libxlDriverConfigPtr cfg = libxlDriverConfigGet(driver);
time_t curtime = time(NULL);
char timestr[100];
struct tm time_info;
char *dumpfile = NULL;
int ret = -1;
localtime_r(&curtime, &time_info);
strftime(timestr, sizeof(timestr), "%Y-%m-%d-%H:%M:%S", &time_info);
if (virAsprintf(&dumpfile, "%s/%s-%s",
cfg->autoDumpDir,
vm->def->name,
timestr) < 0)
goto cleanup;
/* Unlock virDomainObj while dumping core */
virObjectUnlock(vm);
libxl_domain_core_dump(cfg->ctx, vm->def->id, dumpfile, NULL);
virObjectLock(vm);
ret = 0;
cleanup:
VIR_FREE(dumpfile);
virObjectUnref(cfg);
return ret;
}
int
libxlDomainSetVcpuAffinities(libxlDriverPrivatePtr driver, virDomainObjPtr vm)
{
libxlDriverConfigPtr cfg = libxlDriverConfigGet(driver);
virDomainVcpuInfoPtr vcpu;
libxl_bitmap map;
virBitmapPtr cpumask = NULL;
size_t i;
int ret = -1;
libxl_bitmap_init(&map);
for (i = 0; i < virDomainDefGetVcpus(vm->def); ++i) {
vcpu = virDomainDefGetVcpu(vm->def, i);
if (!vcpu->online)
continue;
if (!(cpumask = vcpu->cpumask))
cpumask = vm->def->cpumask;
if (!cpumask)
continue;
if (virBitmapToData(cpumask, &map.map, (int *)&map.size) < 0)
goto cleanup;
if (libxl_set_vcpuaffinity(cfg->ctx, vm->def->id, i, &map) != 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to pin vcpu '%zu' with libxenlight"), i);
goto cleanup;
}
libxl_bitmap_dispose(&map); /* Also returns to freshly-init'd state */
}
ret = 0;
cleanup:
libxl_bitmap_dispose(&map);
virObjectUnref(cfg);
return ret;
}
static int
libxlDomainFreeMem(libxl_ctx *ctx, libxl_domain_config *d_config)
{
uint32_t needed_mem;
uint32_t free_mem;
int tries = 3;
int wait_secs = 10;
if (libxl_domain_need_memory(ctx, &d_config->b_info, &needed_mem) < 0)
goto error;
do {
if (libxl_get_free_memory(ctx, &free_mem) < 0)
goto error;
if (free_mem >= needed_mem)
return 0;
if (libxl_set_memory_target(ctx, 0, free_mem - needed_mem,
/* relative */ 1, 0) < 0)
goto error;
if (libxl_wait_for_memory_target(ctx, 0, wait_secs) < 0)
goto error;
tries--;
} while (tries > 0);
error:
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("Failed to balloon domain0 memory"));
return -1;
}
static void
libxlConsoleCallback(libxl_ctx *ctx, libxl_event *ev, void *for_callback)
{
virDomainObjPtr vm = for_callback;
size_t i;
virObjectLock(vm);
for (i = 0; i < vm->def->nconsoles; i++) {
virDomainChrDefPtr chr = vm->def->consoles[i];
if (chr && chr->source.type == VIR_DOMAIN_CHR_TYPE_PTY) {
libxl_console_type console_type;
char *console = NULL;
int ret;
console_type =
(chr->targetType == VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_SERIAL ?
LIBXL_CONSOLE_TYPE_SERIAL : LIBXL_CONSOLE_TYPE_PV);
ret = libxl_console_get_tty(ctx, ev->domid,
chr->target.port, console_type,
&console);
if (!ret) {
VIR_FREE(chr->source.data.file.path);
if (console && console[0] != '\0') {
ignore_value(VIR_STRDUP(chr->source.data.file.path,
console));
}
}
VIR_FREE(console);
}
}
virObjectUnlock(vm);
libxl_event_free(ctx, ev);
}
/*
* Create interface names for the network devices in parameter def.
* Names are created with the pattern 'vif<domid>.<devid><suffix>'.
* devid is extracted from the network devices in the d_config
* parameter. User-provided interface names are skipped.
*/
static void
libxlDomainCreateIfaceNames(virDomainDefPtr def, libxl_domain_config *d_config)
{
size_t i;
for (i = 0; i < def->nnets && i < d_config->num_nics; i++) {
virDomainNetDefPtr net = def->nets[i];
libxl_device_nic *x_nic = &d_config->nics[i];
const char *suffix =
x_nic->nictype != LIBXL_NIC_TYPE_VIF ? "-emu" : "";
if (net->ifname)
continue;
ignore_value(virAsprintf(&net->ifname,
LIBXL_GENERATED_PREFIX_XEN "%d.%d%s",
def->id, x_nic->devid, suffix));
}
}
/*
* Start a domain through libxenlight.
*
* virDomainObjPtr must be locked and a job acquired on invocation
*/
int
libxlDomainStart(libxlDriverPrivatePtr driver, virDomainObjPtr vm,
bool start_paused, int restore_fd)
{
libxl_domain_config d_config;
virDomainDefPtr def = NULL;
virObjectEventPtr event = NULL;
libxlSavefileHeader hdr;
int ret = -1;
uint32_t domid = 0;
char *dom_xml = NULL;
char *managed_save_path = NULL;
int managed_save_fd = -1;
libxlDomainObjPrivatePtr priv = vm->privateData;
libxlDriverConfigPtr cfg;
#ifdef LIBXL_HAVE_DOMAIN_CREATE_RESTORE_PARAMS
libxl_domain_restore_params params;
#endif
virHostdevManagerPtr hostdev_mgr = driver->hostdevMgr;
libxl_asyncprogress_how aop_console_how;
libxl_domain_config_init(&d_config);
cfg = libxlDriverConfigGet(driver);
/* If there is a managed saved state restore it instead of starting
* from scratch. The old state is removed once the restoring succeeded. */
if (restore_fd < 0) {
managed_save_path = libxlDomainManagedSavePath(driver, vm);
if (managed_save_path == NULL)
goto cleanup;
if (virFileExists(managed_save_path)) {
managed_save_fd = libxlDomainSaveImageOpen(driver, cfg,
managed_save_path,
&def, &hdr);
if (managed_save_fd < 0)
goto cleanup;
restore_fd = managed_save_fd;
if (STRNEQ(vm->def->name, def->name) ||
memcmp(vm->def->uuid, def->uuid, VIR_UUID_BUFLEN)) {
char vm_uuidstr[VIR_UUID_STRING_BUFLEN];
char def_uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(vm->def->uuid, vm_uuidstr);
virUUIDFormat(def->uuid, def_uuidstr);
virReportError(VIR_ERR_OPERATION_FAILED,
_("cannot restore domain '%s' uuid %s from a file"
" which belongs to domain '%s' uuid %s"),
vm->def->name, vm_uuidstr, def->name, def_uuidstr);
goto cleanup;
}
virDomainObjAssignDef(vm, def, true, NULL);
def = NULL;
if (unlink(managed_save_path) < 0)
VIR_WARN("Failed to remove the managed state %s",
managed_save_path);
vm->hasManagedSave = false;
}
VIR_FREE(managed_save_path);
}
if (virDomainObjSetDefTransient(cfg->caps, driver->xmlopt,
vm, true) < 0)
goto cleanup;
if (libxlBuildDomainConfig(driver->reservedGraphicsPorts, vm->def,
cfg->ctx, &d_config) < 0)
goto cleanup;
if (cfg->autoballoon && libxlDomainFreeMem(cfg->ctx, &d_config) < 0)
goto cleanup;
if (virHostdevPrepareDomainDevices(hostdev_mgr, LIBXL_DRIVER_NAME,
vm->def, VIR_HOSTDEV_SP_PCI) < 0)
goto cleanup;
if (virDomainLockProcessStart(driver->lockManager,
"xen:///system",
vm,
true,
NULL) < 0)
goto cleanup;
if (virDomainLockProcessResume(driver->lockManager,
"xen:///system",
vm,
priv->lockState) < 0)
goto cleanup;
VIR_FREE(priv->lockState);
/* Unlock virDomainObj while creating the domain */
virObjectUnlock(vm);
aop_console_how.for_callback = vm;
aop_console_how.callback = libxlConsoleCallback;
if (restore_fd < 0) {
ret = libxl_domain_create_new(cfg->ctx, &d_config,
&domid, NULL, &aop_console_how);
} else {
#ifdef LIBXL_HAVE_DOMAIN_CREATE_RESTORE_PARAMS
params.checkpointed_stream = 0;
ret = libxl_domain_create_restore(cfg->ctx, &d_config, &domid,
restore_fd, &params, NULL,
&aop_console_how);
#else
ret = libxl_domain_create_restore(cfg->ctx, &d_config, &domid,
restore_fd, NULL, &aop_console_how);
#endif
}
virObjectLock(vm);
if (ret) {
if (restore_fd < 0)
virReportError(VIR_ERR_INTERNAL_ERROR,
_("libxenlight failed to create new domain '%s'"),
d_config.c_info.name);
else
virReportError(VIR_ERR_INTERNAL_ERROR,
_("libxenlight failed to restore domain '%s'"),
d_config.c_info.name);
goto release_dom;
}
/*
* The domain has been successfully created with libxl, so it should
* be cleaned up if there are any subsequent failures.
*/
vm->def->id = domid;
/* Always enable domain death events */
if (libxl_evenable_domain_death(cfg->ctx, vm->def->id, 0, &priv->deathW))
goto cleanup_dom;
libxlDomainCreateIfaceNames(vm->def, &d_config);
if ((dom_xml = virDomainDefFormat(vm->def, cfg->caps, 0)) == NULL)
goto cleanup_dom;
if (libxl_userdata_store(cfg->ctx, domid, "libvirt-xml",
(uint8_t *)dom_xml, strlen(dom_xml) + 1)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("libxenlight failed to store userdata"));
goto cleanup_dom;
}
if (libxlDomainSetVcpuAffinities(driver, vm) < 0)
goto cleanup_dom;
if (!start_paused) {
libxl_domain_unpause(cfg->ctx, domid);
virDomainObjSetState(vm, VIR_DOMAIN_RUNNING, VIR_DOMAIN_RUNNING_BOOTED);
} else {
virDomainObjSetState(vm, VIR_DOMAIN_PAUSED, VIR_DOMAIN_PAUSED_USER);
}
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, cfg->caps) < 0)
goto cleanup_dom;
if (virAtomicIntInc(&driver->nactive) == 1 && driver->inhibitCallback)
driver->inhibitCallback(true, driver->inhibitOpaque);
event = virDomainEventLifecycleNewFromObj(vm, VIR_DOMAIN_EVENT_STARTED,
restore_fd < 0 ?
VIR_DOMAIN_EVENT_STARTED_BOOTED :
VIR_DOMAIN_EVENT_STARTED_RESTORED);
if (event)
libxlDomainEventQueue(driver, event);
ret = 0;
goto cleanup;
cleanup_dom:
ret = -1;
if (priv->deathW) {
libxl_evdisable_domain_death(cfg->ctx, priv->deathW);
priv->deathW = NULL;
}
libxlDomainDestroyInternal(driver, vm);
vm->def->id = -1;
virDomainObjSetState(vm, VIR_DOMAIN_SHUTOFF, VIR_DOMAIN_SHUTOFF_FAILED);
release_dom:
virDomainLockProcessPause(driver->lockManager, vm, &priv->lockState);
cleanup:
libxl_domain_config_dispose(&d_config);
VIR_FREE(dom_xml);
VIR_FREE(managed_save_path);
virDomainDefFree(def);
VIR_FORCE_CLOSE(managed_save_fd);
virObjectUnref(cfg);
return ret;
}
bool
libxlDomainDefCheckABIStability(libxlDriverPrivatePtr driver,
virDomainDefPtr src,
virDomainDefPtr dst)
{
virDomainDefPtr migratableDefSrc = NULL;
virDomainDefPtr migratableDefDst = NULL;
libxlDriverConfigPtr cfg = libxlDriverConfigGet(driver);
bool ret = false;
if (!(migratableDefSrc = virDomainDefCopy(src, cfg->caps, driver->xmlopt, true)) ||
!(migratableDefDst = virDomainDefCopy(dst, cfg->caps, driver->xmlopt, true)))
goto cleanup;
ret = virDomainDefCheckABIStability(migratableDefSrc, migratableDefDst);
cleanup:
virDomainDefFree(migratableDefSrc);
virDomainDefFree(migratableDefDst);
virObjectUnref(cfg);
return ret;
}
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