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libvirt/src/qemu/qemu_domain.c
Pavel Hrdina acc83afe33 vnc: add support for listen type 'socket' 
VNC graphics already supports sockets but only via 'socket' attribute.
This patch coverts that attribute into listen type 'socket'.

For backward compatibility we need to handle listen type 'socket' and 'socket'
attribute properly to support old XMLs and new XMLs.  If both are provided they
have to match, if only one of them is provided we need to be able to parse that
configuration too.

To not break migration back to old libvirt if the socket is provided by user we
need to generate migratable XML without the listen element and use only 'socket'
attribute.

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
2016-06-09 14:42:48 +02:00

5578 lines
171 KiB
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/*
* qemu_domain.c: QEMU domain private state
*
* Copyright (C) 2006-2016 Red Hat, Inc.
* Copyright (C) 2006 Daniel P. Berrange
*
* 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/>.
*
* Author: Daniel P. Berrange <berrange@redhat.com>
*/
#include <config.h>
#include "qemu_domain.h"
#include "qemu_alias.h"
#include "qemu_cgroup.h"
#include "qemu_command.h"
#include "qemu_parse_command.h"
#include "qemu_capabilities.h"
#include "qemu_migration.h"
#include "viralloc.h"
#include "virlog.h"
#include "virerror.h"
#include "c-ctype.h"
#include "cpu/cpu.h"
#include "viruuid.h"
#include "virfile.h"
#include "domain_addr.h"
#include "domain_event.h"
#include "virtime.h"
#include "virstoragefile.h"
#include "virstring.h"
#include "virthreadjob.h"
#include "viratomic.h"
#include "virprocess.h"
#include "vircrypto.h"
#include "secret_util.h"
#include "logging/log_manager.h"
#include "locking/domain_lock.h"
#include "storage/storage_driver.h"
#include <sys/time.h>
#include <fcntl.h>
#include <libxml/xpathInternals.h>
#define VIR_FROM_THIS VIR_FROM_QEMU
VIR_LOG_INIT("qemu.qemu_domain");
#define QEMU_NAMESPACE_HREF "http://libvirt.org/schemas/domain/qemu/1.0"
VIR_ENUM_IMPL(qemuDomainJob, QEMU_JOB_LAST,
"none",
"query",
"destroy",
"suspend",
"modify",
"abort",
"migration operation",
"none", /* async job is never stored in job.active */
"async nested",
);
VIR_ENUM_IMPL(qemuDomainAsyncJob, QEMU_ASYNC_JOB_LAST,
"none",
"migration out",
"migration in",
"save",
"dump",
"snapshot",
"start",
);
struct _qemuDomainLogContext {
int refs;
int writefd;
int readfd; /* Only used if manager == NULL */
off_t pos;
ino_t inode; /* Only used if manager != NULL */
char *path;
virLogManagerPtr manager;
};
const char *
qemuDomainAsyncJobPhaseToString(qemuDomainAsyncJob job,
int phase ATTRIBUTE_UNUSED)
{
switch (job) {
case QEMU_ASYNC_JOB_MIGRATION_OUT:
case QEMU_ASYNC_JOB_MIGRATION_IN:
return qemuMigrationJobPhaseTypeToString(phase);
case QEMU_ASYNC_JOB_SAVE:
case QEMU_ASYNC_JOB_DUMP:
case QEMU_ASYNC_JOB_SNAPSHOT:
case QEMU_ASYNC_JOB_START:
case QEMU_ASYNC_JOB_NONE:
case QEMU_ASYNC_JOB_LAST:
; /* fall through */
}
return "none";
}
int
qemuDomainAsyncJobPhaseFromString(qemuDomainAsyncJob job,
const char *phase)
{
if (!phase)
return 0;
switch (job) {
case QEMU_ASYNC_JOB_MIGRATION_OUT:
case QEMU_ASYNC_JOB_MIGRATION_IN:
return qemuMigrationJobPhaseTypeFromString(phase);
case QEMU_ASYNC_JOB_SAVE:
case QEMU_ASYNC_JOB_DUMP:
case QEMU_ASYNC_JOB_SNAPSHOT:
case QEMU_ASYNC_JOB_START:
case QEMU_ASYNC_JOB_NONE:
case QEMU_ASYNC_JOB_LAST:
; /* fall through */
}
if (STREQ(phase, "none"))
return 0;
else
return -1;
}
void qemuDomainEventQueue(virQEMUDriverPtr driver,
virObjectEventPtr event)
{
if (event)
virObjectEventStateQueue(driver->domainEventState, event);
}
void
qemuDomainEventEmitJobCompleted(virQEMUDriverPtr driver,
virDomainObjPtr vm)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
virObjectEventPtr event;
virTypedParameterPtr params = NULL;
int nparams = 0;
int type;
if (!priv->job.completed)
return;
if (qemuDomainJobInfoToParams(priv->job.completed, &type,
&params, &nparams) < 0) {
VIR_WARN("Could not get stats for completed job; domain %s",
vm->def->name);
}
event = virDomainEventJobCompletedNewFromObj(vm, params, nparams);
qemuDomainEventQueue(driver, event);
}
static int
qemuDomainObjInitJob(qemuDomainObjPrivatePtr priv)
{
memset(&priv->job, 0, sizeof(priv->job));
if (virCondInit(&priv->job.cond) < 0)
return -1;
if (virCondInit(&priv->job.asyncCond) < 0) {
virCondDestroy(&priv->job.cond);
return -1;
}
return 0;
}
static void
qemuDomainObjResetJob(qemuDomainObjPrivatePtr priv)
{
struct qemuDomainJobObj *job = &priv->job;
job->active = QEMU_JOB_NONE;
job->owner = 0;
job->ownerAPI = NULL;
job->started = 0;
}
static void
qemuDomainObjResetAsyncJob(qemuDomainObjPrivatePtr priv)
{
struct qemuDomainJobObj *job = &priv->job;
job->asyncJob = QEMU_ASYNC_JOB_NONE;
job->asyncOwner = 0;
job->asyncOwnerAPI = NULL;
job->asyncStarted = 0;
job->phase = 0;
job->mask = QEMU_JOB_DEFAULT_MASK;
job->dump_memory_only = false;
job->abortJob = false;
job->spiceMigrated = false;
job->postcopyEnabled = false;
VIR_FREE(job->current);
}
void
qemuDomainObjRestoreJob(virDomainObjPtr obj,
struct qemuDomainJobObj *job)
{
qemuDomainObjPrivatePtr priv = obj->privateData;
memset(job, 0, sizeof(*job));
job->active = priv->job.active;
job->owner = priv->job.owner;
job->asyncJob = priv->job.asyncJob;
job->asyncOwner = priv->job.asyncOwner;
job->phase = priv->job.phase;
qemuDomainObjResetJob(priv);
qemuDomainObjResetAsyncJob(priv);
}
static void
qemuDomainObjFreeJob(qemuDomainObjPrivatePtr priv)
{
VIR_FREE(priv->job.current);
VIR_FREE(priv->job.completed);
virCondDestroy(&priv->job.cond);
virCondDestroy(&priv->job.asyncCond);
}
static bool
qemuDomainTrackJob(qemuDomainJob job)
{
return (QEMU_DOMAIN_TRACK_JOBS & JOB_MASK(job)) != 0;
}
int
qemuDomainJobInfoUpdateTime(qemuDomainJobInfoPtr jobInfo)
{
unsigned long long now;
if (!jobInfo->started)
return 0;
if (virTimeMillisNow(&now) < 0)
return -1;
if (now < jobInfo->started) {
VIR_WARN("Async job starts in the future");
jobInfo->started = 0;
return 0;
}
jobInfo->timeElapsed = now - jobInfo->started;
return 0;
}
int
qemuDomainJobInfoUpdateDowntime(qemuDomainJobInfoPtr jobInfo)
{
unsigned long long now;
if (!jobInfo->stopped)
return 0;
if (virTimeMillisNow(&now) < 0)
return -1;
if (now < jobInfo->stopped) {
VIR_WARN("Guest's CPUs stopped in the future");
jobInfo->stopped = 0;
return 0;
}
jobInfo->stats.downtime = now - jobInfo->stopped;
jobInfo->stats.downtime_set = true;
return 0;
}
int
qemuDomainJobInfoToInfo(qemuDomainJobInfoPtr jobInfo,
virDomainJobInfoPtr info)
{
info->type = jobInfo->type;
info->timeElapsed = jobInfo->timeElapsed;
info->timeRemaining = jobInfo->timeRemaining;
info->memTotal = jobInfo->stats.ram_total;
info->memRemaining = jobInfo->stats.ram_remaining;
info->memProcessed = jobInfo->stats.ram_transferred;
info->fileTotal = jobInfo->stats.disk_total;
info->fileRemaining = jobInfo->stats.disk_remaining;
info->fileProcessed = jobInfo->stats.disk_transferred;
info->dataTotal = info->memTotal + info->fileTotal;
info->dataRemaining = info->memRemaining + info->fileRemaining;
info->dataProcessed = info->memProcessed + info->fileProcessed;
return 0;
}
int
qemuDomainJobInfoToParams(qemuDomainJobInfoPtr jobInfo,
int *type,
virTypedParameterPtr *params,
int *nparams)
{
qemuMonitorMigrationStats *stats = &jobInfo->stats;
virTypedParameterPtr par = NULL;
int maxpar = 0;
int npar = 0;
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_TIME_ELAPSED,
jobInfo->timeElapsed) < 0)
goto error;
if (jobInfo->timeDeltaSet &&
jobInfo->timeElapsed > jobInfo->timeDelta &&
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_TIME_ELAPSED_NET,
jobInfo->timeElapsed - jobInfo->timeDelta) < 0)
goto error;
if (jobInfo->type == VIR_DOMAIN_JOB_BOUNDED &&
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_TIME_REMAINING,
jobInfo->timeRemaining) < 0)
goto error;
if (stats->downtime_set &&
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DOWNTIME,
stats->downtime) < 0)
goto error;
if (stats->downtime_set &&
jobInfo->timeDeltaSet &&
stats->downtime > jobInfo->timeDelta &&
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DOWNTIME_NET,
stats->downtime - jobInfo->timeDelta) < 0)
goto error;
if (stats->setup_time_set &&
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_SETUP_TIME,
stats->setup_time) < 0)
goto error;
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DATA_TOTAL,
stats->ram_total +
stats->disk_total) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DATA_PROCESSED,
stats->ram_transferred +
stats->disk_transferred) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DATA_REMAINING,
stats->ram_remaining +
stats->disk_remaining) < 0)
goto error;
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_TOTAL,
stats->ram_total) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_PROCESSED,
stats->ram_transferred) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_REMAINING,
stats->ram_remaining) < 0)
goto error;
if (stats->ram_bps &&
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_BPS,
stats->ram_bps) < 0)
goto error;
if (stats->ram_duplicate_set) {
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_CONSTANT,
stats->ram_duplicate) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_NORMAL,
stats->ram_normal) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_NORMAL_BYTES,
stats->ram_normal_bytes) < 0)
goto error;
}
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_DIRTY_RATE,
stats->ram_dirty_rate) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_MEMORY_ITERATION,
stats->ram_iteration) < 0)
goto error;
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DISK_TOTAL,
stats->disk_total) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DISK_PROCESSED,
stats->disk_transferred) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DISK_REMAINING,
stats->disk_remaining) < 0)
goto error;
if (stats->disk_bps &&
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_DISK_BPS,
stats->disk_bps) < 0)
goto error;
if (stats->xbzrle_set) {
if (virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_COMPRESSION_CACHE,
stats->xbzrle_cache_size) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_COMPRESSION_BYTES,
stats->xbzrle_bytes) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_COMPRESSION_PAGES,
stats->xbzrle_pages) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_COMPRESSION_CACHE_MISSES,
stats->xbzrle_cache_miss) < 0 ||
virTypedParamsAddULLong(&par, &npar, &maxpar,
VIR_DOMAIN_JOB_COMPRESSION_OVERFLOW,
stats->xbzrle_overflow) < 0)
goto error;
}
*type = jobInfo->type;
*params = par;
*nparams = npar;
return 0;
error:
virTypedParamsFree(par, npar);
return -1;
}
/* qemuDomainGetMasterKeyFilePath:
* @libDir: Directory path to domain lib files
*
* Generate a path to the domain master key file for libDir.
* It's up to the caller to handle checking if path exists.
*
* Returns path to memory containing the name of the file. It is up to the
* caller to free; otherwise, NULL on failure.
*/
char *
qemuDomainGetMasterKeyFilePath(const char *libDir)
{
if (!libDir) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("invalid path for master key file"));
return NULL;
}
return virFileBuildPath(libDir, "master-key.aes", NULL);
}
/* qemuDomainWriteMasterKeyFile:
* @driver: qemu driver data
* @vm: Pointer to the vm object
*
* Get the desired path to the masterKey file and store it in the path.
*
* Returns 0 on success, -1 on failure with error message indicating failure
*/
int
qemuDomainWriteMasterKeyFile(virQEMUDriverPtr driver,
virDomainObjPtr vm)
{
char *path;
int fd = -1;
int ret = -1;
qemuDomainObjPrivatePtr priv = vm->privateData;
/* Only gets filled in if we have the capability */
if (!priv->masterKey)
return 0;
if (!(path = qemuDomainGetMasterKeyFilePath(priv->libDir)))
return -1;
if ((fd = open(path, O_WRONLY|O_TRUNC|O_CREAT, 0600)) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to open domain master key file for write"));
goto cleanup;
}
if (safewrite(fd, priv->masterKey, priv->masterKeyLen) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to write master key file for domain"));
goto cleanup;
}
if (virSecurityManagerDomainSetPathLabel(driver->securityManager,
vm->def, path) < 0)
goto cleanup;
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
VIR_FREE(path);
return ret;
}
/* qemuDomainMasterKeyReadFile:
* @priv: pointer to domain private object
*
* Expected to be called during qemuProcessReconnect once the domain
* libDir has been generated through qemuStateInitialize calling
* virDomainObjListLoadAllConfigs which will restore the libDir path
* to the domain private object.
*
* This function will get the path to the master key file and if it
* exists, it will read the contents of the file saving it in priv->masterKey.
*
* Once the file exists, the validity checks may cause failures; however,
* if the file doesn't exist or the capability doesn't exist, we just
* return (mostly) quietly.
*
* Returns 0 on success or lack of capability
* -1 on failure with error message indicating failure
*/
int
qemuDomainMasterKeyReadFile(qemuDomainObjPrivatePtr priv)
{
char *path;
int fd = -1;
uint8_t *masterKey = NULL;
ssize_t masterKeyLen = 0;
/* If we don't have the capability, then do nothing. */
if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_OBJECT_SECRET))
return 0;
if (!(path = qemuDomainGetMasterKeyFilePath(priv->libDir)))
return -1;
if (!virFileExists(path)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("domain master key file doesn't exist in %s"),
priv->libDir);
goto error;
}
if ((fd = open(path, O_RDONLY)) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to open domain master key file for read"));
goto error;
}
if (VIR_ALLOC_N(masterKey, 1024) < 0)
goto error;
if ((masterKeyLen = saferead(fd, masterKey, 1024)) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("unable to read domain master key file"));
goto error;
}
if (masterKeyLen != QEMU_DOMAIN_MASTER_KEY_LEN) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("invalid master key read, size=%zd"), masterKeyLen);
goto error;
}
ignore_value(VIR_REALLOC_N_QUIET(masterKey, masterKeyLen));
priv->masterKey = masterKey;
priv->masterKeyLen = masterKeyLen;
VIR_FORCE_CLOSE(fd);
VIR_FREE(path);
return 0;
error:
if (masterKeyLen > 0)
memset(masterKey, 0, masterKeyLen);
VIR_FREE(masterKey);
VIR_FORCE_CLOSE(fd);
VIR_FREE(path);
return -1;
}
/* qemuDomainMasterKeyRemove:
* @priv: Pointer to the domain private object
*
* Remove the traces of the master key, clear the heap, clear the file,
* delete the file.
*/
void
qemuDomainMasterKeyRemove(qemuDomainObjPrivatePtr priv)
{
char *path = NULL;
if (!priv->masterKey)
return;
/* Clear the contents */
memset(priv->masterKey, 0, priv->masterKeyLen);
VIR_FREE(priv->masterKey);
priv->masterKeyLen = 0;
/* Delete the master key file */
path = qemuDomainGetMasterKeyFilePath(priv->libDir);
unlink(path);
VIR_FREE(path);
}
/* qemuDomainMasterKeyCreate:
* @vm: Pointer to the domain object
*
* As long as the underlying qemu has the secret capability,
* generate and store 'raw' in a file a random 32-byte key to
* be used as a secret shared with qemu to share sensitive data.
*
* Returns: 0 on success, -1 w/ error message on failure
*/
int
qemuDomainMasterKeyCreate(virDomainObjPtr vm)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
/* If we don't have the capability, then do nothing. */
if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_OBJECT_SECRET))
return 0;
if (!(priv->masterKey =
virCryptoGenerateRandom(QEMU_DOMAIN_MASTER_KEY_LEN)))
return -1;
priv->masterKeyLen = QEMU_DOMAIN_MASTER_KEY_LEN;
return 0;
}
static void
qemuDomainSecretPlainClear(qemuDomainSecretPlain secret)
{
VIR_FREE(secret.username);
VIR_DISPOSE_N(secret.secret, secret.secretlen);
}
static void
qemuDomainSecretAESClear(qemuDomainSecretAES secret)
{
VIR_FREE(secret.username);
VIR_FREE(secret.alias);
VIR_FREE(secret.iv);
VIR_FREE(secret.ciphertext);
}
static void
qemuDomainSecretInfoFree(qemuDomainSecretInfoPtr *secinfo)
{
if (!*secinfo)
return;
switch ((qemuDomainSecretInfoType) (*secinfo)->type) {
case VIR_DOMAIN_SECRET_INFO_TYPE_PLAIN:
qemuDomainSecretPlainClear((*secinfo)->s.plain);
break;
case VIR_DOMAIN_SECRET_INFO_TYPE_AES:
qemuDomainSecretAESClear((*secinfo)->s.aes);
break;
case VIR_DOMAIN_SECRET_INFO_TYPE_LAST:
break;
}
VIR_FREE(*secinfo);
}
static virClassPtr qemuDomainDiskPrivateClass;
static void qemuDomainDiskPrivateDispose(void *obj);
static int
qemuDomainDiskPrivateOnceInit(void)
{
qemuDomainDiskPrivateClass = virClassNew(virClassForObject(),
"qemuDomainDiskPrivate",
sizeof(qemuDomainDiskPrivate),
qemuDomainDiskPrivateDispose);
if (!qemuDomainDiskPrivateClass)
return -1;
else
return 0;
}
VIR_ONCE_GLOBAL_INIT(qemuDomainDiskPrivate)
static virObjectPtr
qemuDomainDiskPrivateNew(void)
{
qemuDomainDiskPrivatePtr priv;
if (qemuDomainDiskPrivateInitialize() < 0)
return NULL;
if (!(priv = virObjectNew(qemuDomainDiskPrivateClass)))
return NULL;
return (virObjectPtr) priv;
}
static void
qemuDomainDiskPrivateDispose(void *obj)
{
qemuDomainDiskPrivatePtr priv = obj;
qemuDomainSecretInfoFree(&priv->secinfo);
}
static virClassPtr qemuDomainHostdevPrivateClass;
static void qemuDomainHostdevPrivateDispose(void *obj);
static int
qemuDomainHostdevPrivateOnceInit(void)
{
qemuDomainHostdevPrivateClass =
virClassNew(virClassForObject(),
"qemuDomainHostdevPrivate",
sizeof(qemuDomainHostdevPrivate),
qemuDomainHostdevPrivateDispose);
if (!qemuDomainHostdevPrivateClass)
return -1;
else
return 0;
}
VIR_ONCE_GLOBAL_INIT(qemuDomainHostdevPrivate)
static virObjectPtr
qemuDomainHostdevPrivateNew(void)
{
qemuDomainHostdevPrivatePtr priv;
if (qemuDomainHostdevPrivateInitialize() < 0)
return NULL;
if (!(priv = virObjectNew(qemuDomainHostdevPrivateClass)))
return NULL;
return (virObjectPtr) priv;
}
static void
qemuDomainHostdevPrivateDispose(void *obj)
{
qemuDomainHostdevPrivatePtr priv = obj;
qemuDomainSecretInfoFree(&priv->secinfo);
}
/* qemuDomainSecretPlainSetup:
* @conn: Pointer to connection
* @secinfo: Pointer to secret info
* @protocol: Protocol for secret
* @authdef: Pointer to auth data
*
* Taking a secinfo, fill in the plaintext information
*
* Returns 0 on success, -1 on failure with error message
*/
static int
qemuDomainSecretPlainSetup(virConnectPtr conn,
qemuDomainSecretInfoPtr secinfo,
virStorageNetProtocol protocol,
virStorageAuthDefPtr authdef)
{
int secretType = VIR_SECRET_USAGE_TYPE_ISCSI;
secinfo->type = VIR_DOMAIN_SECRET_INFO_TYPE_PLAIN;
if (VIR_STRDUP(secinfo->s.plain.username, authdef->username) < 0)
return -1;
if (protocol == VIR_STORAGE_NET_PROTOCOL_RBD)
secretType = VIR_SECRET_USAGE_TYPE_CEPH;
return virSecretGetSecretString(conn, authdef, secretType,
&secinfo->s.plain.secret,
&secinfo->s.plain.secretlen);
}
/* qemuDomainSecretAESSetup:
* @conn: Pointer to connection
* @priv: pointer to domain private object
* @secinfo: Pointer to secret info
* @srcalias: Alias of the disk/hostdev used to generate the secret alias
* @protocol: Protocol for secret
* @authdef: Pointer to auth data
*
* Taking a secinfo, fill in the AES specific information using the
*
* Returns 0 on success, -1 on failure with error message
*/
static int
qemuDomainSecretAESSetup(virConnectPtr conn,
qemuDomainObjPrivatePtr priv,
qemuDomainSecretInfoPtr secinfo,
const char *srcalias,
virStorageNetProtocol protocol,
virStorageAuthDefPtr authdef)
{
int ret = -1;
uint8_t *raw_iv = NULL;
size_t ivlen = QEMU_DOMAIN_AES_IV_LEN;
uint8_t *secret = NULL;
size_t secretlen = 0;
uint8_t *ciphertext = NULL;
size_t ciphertextlen = 0;
int secretType = VIR_SECRET_USAGE_TYPE_NONE;
secinfo->type = VIR_DOMAIN_SECRET_INFO_TYPE_AES;
if (VIR_STRDUP(secinfo->s.aes.username, authdef->username) < 0)
return -1;
switch ((virStorageNetProtocol)protocol) {
case VIR_STORAGE_NET_PROTOCOL_RBD:
secretType = VIR_SECRET_USAGE_TYPE_CEPH;
break;
case VIR_STORAGE_NET_PROTOCOL_NONE:
case VIR_STORAGE_NET_PROTOCOL_NBD:
case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
case VIR_STORAGE_NET_PROTOCOL_ISCSI:
case VIR_STORAGE_NET_PROTOCOL_HTTP:
case VIR_STORAGE_NET_PROTOCOL_HTTPS:
case VIR_STORAGE_NET_PROTOCOL_FTP:
case VIR_STORAGE_NET_PROTOCOL_FTPS:
case VIR_STORAGE_NET_PROTOCOL_TFTP:
case VIR_STORAGE_NET_PROTOCOL_LAST:
virReportError(VIR_ERR_INTERNAL_ERROR,
_("protocol '%s' cannot be used for encrypted secrets"),
virStorageNetProtocolTypeToString(protocol));
return -1;
}
if (!(secinfo->s.aes.alias = qemuDomainGetSecretAESAlias(srcalias)))
return -1;
/* Create a random initialization vector */
if (!(raw_iv = virCryptoGenerateRandom(ivlen)))
return -1;
/* Encode the IV and save that since qemu will need it */
if (!(secinfo->s.aes.iv = virStringEncodeBase64(raw_iv, ivlen)))
goto cleanup;
/* Grab the unencoded secret */
if (virSecretGetSecretString(conn, authdef, secretType,
&secret, &secretlen) < 0)
goto cleanup;
if (virCryptoEncryptData(VIR_CRYPTO_CIPHER_AES256CBC,
priv->masterKey, QEMU_DOMAIN_MASTER_KEY_LEN,
raw_iv, ivlen, secret, secretlen,
&ciphertext, &ciphertextlen) < 0)
goto cleanup;
/* Clear out the secret */
memset(secret, 0, secretlen);
/* Now encode the ciphertext and store to be passed to qemu */
if (!(secinfo->s.aes.ciphertext = virStringEncodeBase64(ciphertext,
ciphertextlen)))
goto cleanup;
ret = 0;
cleanup:
VIR_DISPOSE_N(raw_iv, ivlen);
VIR_DISPOSE_N(secret, secretlen);
VIR_DISPOSE_N(ciphertext, ciphertextlen);
return ret;
}
/* qemuDomainSecretSetup:
* @conn: Pointer to connection
* @priv: pointer to domain private object
* @secinfo: Pointer to secret info
* @srcalias: Alias of the disk/hostdev used to generate the secret alias
* @protocol: Protocol for secret
* @authdef: Pointer to auth data
*
* If we have the encryption API present and can support a secret object, then
* build the AES secret; otherwise, build the Plain secret. This is the magic
* decision point for utilizing the AES secrets for an RBD disk. For now iSCSI
* disks and hostdevs will not be able to utilize this mechanism.
*
* Returns 0 on success, -1 on failure
*/
static int
qemuDomainSecretSetup(virConnectPtr conn,
qemuDomainObjPrivatePtr priv,
qemuDomainSecretInfoPtr secinfo,
const char *srcalias,
virStorageNetProtocol protocol,
virStorageAuthDefPtr authdef)
{
if (virCryptoHaveCipher(VIR_CRYPTO_CIPHER_AES256CBC) &&
virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_OBJECT_SECRET) &&
protocol == VIR_STORAGE_NET_PROTOCOL_RBD) {
if (qemuDomainSecretAESSetup(conn, priv, secinfo,
srcalias, protocol, authdef) < 0)
return -1;
} else {
if (qemuDomainSecretPlainSetup(conn, secinfo, protocol, authdef) < 0)
return -1;
}
return 0;
}
/* qemuDomainSecretDiskDestroy:
* @disk: Pointer to a disk definition
*
* Clear and destroy memory associated with the secret
*/
void
qemuDomainSecretDiskDestroy(virDomainDiskDefPtr disk)
{
qemuDomainDiskPrivatePtr diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk);
if (!diskPriv || !diskPriv->secinfo)
return;
qemuDomainSecretInfoFree(&diskPriv->secinfo);
}
/* qemuDomainSecretDiskPrepare:
* @conn: Pointer to connection
* @priv: pointer to domain private object
* @disk: Pointer to a disk definition
*
* For the right disk, generate the qemuDomainSecretInfo structure.
*
* Returns 0 on success, -1 on failure
*/
int
qemuDomainSecretDiskPrepare(virConnectPtr conn,
qemuDomainObjPrivatePtr priv,
virDomainDiskDefPtr disk)
{
virStorageSourcePtr src = disk->src;
qemuDomainSecretInfoPtr secinfo = NULL;
if (conn && !virStorageSourceIsEmpty(src) &&
virStorageSourceGetActualType(src) == VIR_STORAGE_TYPE_NETWORK &&
src->auth &&
(src->protocol == VIR_STORAGE_NET_PROTOCOL_ISCSI ||
src->protocol == VIR_STORAGE_NET_PROTOCOL_RBD)) {
qemuDomainDiskPrivatePtr diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk);
if (VIR_ALLOC(secinfo) < 0)
return -1;
if (qemuDomainSecretSetup(conn, priv, secinfo, disk->info.alias,
src->protocol, src->auth) < 0)
goto error;
diskPriv->secinfo = secinfo;
}
return 0;
error:
qemuDomainSecretInfoFree(&secinfo);
return -1;
}
/* qemuDomainSecretHostdevDestroy:
* @disk: Pointer to a hostdev definition
*
* Clear and destroy memory associated with the secret
*/
void
qemuDomainSecretHostdevDestroy(virDomainHostdevDefPtr hostdev)
{
qemuDomainHostdevPrivatePtr hostdevPriv =
QEMU_DOMAIN_HOSTDEV_PRIVATE(hostdev);
if (!hostdevPriv || !hostdevPriv->secinfo)
return;
qemuDomainSecretInfoFree(&hostdevPriv->secinfo);
}
/* qemuDomainSecretHostdevPrepare:
* @conn: Pointer to connection
* @priv: pointer to domain private object
* @hostdev: Pointer to a hostdev definition
*
* For the right host device, generate the qemuDomainSecretInfo structure.
*
* Returns 0 on success, -1 on failure
*/
int
qemuDomainSecretHostdevPrepare(virConnectPtr conn,
qemuDomainObjPrivatePtr priv,
virDomainHostdevDefPtr hostdev)
{
virDomainHostdevSubsysPtr subsys = &hostdev->source.subsys;
qemuDomainSecretInfoPtr secinfo = NULL;
if (conn && hostdev->mode == VIR_DOMAIN_HOSTDEV_MODE_SUBSYS &&
subsys->type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI) {
virDomainHostdevSubsysSCSIPtr scsisrc = &hostdev->source.subsys.u.scsi;
virDomainHostdevSubsysSCSIiSCSIPtr iscsisrc = &scsisrc->u.iscsi;
if (scsisrc->protocol == VIR_DOMAIN_HOSTDEV_SCSI_PROTOCOL_TYPE_ISCSI &&
iscsisrc->auth) {
qemuDomainHostdevPrivatePtr hostdevPriv =
QEMU_DOMAIN_HOSTDEV_PRIVATE(hostdev);
if (VIR_ALLOC(secinfo) < 0)
return -1;
if (qemuDomainSecretSetup(conn, priv, secinfo, hostdev->info->alias,
VIR_STORAGE_NET_PROTOCOL_ISCSI,
iscsisrc->auth) < 0)
goto error;
hostdevPriv->secinfo = secinfo;
}
}
return 0;
error:
qemuDomainSecretInfoFree(&secinfo);
return -1;
}
/* qemuDomainSecretDestroy:
* @vm: Domain object
*
* Once completed with the generation of the command line it is
* expect to remove the secrets
*/
void
qemuDomainSecretDestroy(virDomainObjPtr vm)
{
size_t i;
for (i = 0; i < vm->def->ndisks; i++)
qemuDomainSecretDiskDestroy(vm->def->disks[i]);
for (i = 0; i < vm->def->nhostdevs; i++)
qemuDomainSecretHostdevDestroy(vm->def->hostdevs[i]);
}
/* qemuDomainSecretPrepare:
* @conn: Pointer to connection
* @vm: Domain object
*
* For any objects that may require an auth/secret setup, create a
* qemuDomainSecretInfo and save it in the approriate place within
* the private structures. This will be used by command line build
* code in order to pass the secret along to qemu in order to provide
* the necessary authentication data.
*
* Returns 0 on success, -1 on failure with error message set
*/
int
qemuDomainSecretPrepare(virConnectPtr conn,
virDomainObjPtr vm)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
size_t i;
for (i = 0; i < vm->def->ndisks; i++) {
if (qemuDomainSecretDiskPrepare(conn, priv, vm->def->disks[i]) < 0)
return -1;
}
for (i = 0; i < vm->def->nhostdevs; i++) {
if (qemuDomainSecretHostdevPrepare(conn, priv,
vm->def->hostdevs[i]) < 0)
return -1;
}
return 0;
}
/* This is the old way of setting up per-domain directories */
static int
qemuDomainSetPrivatePathsOld(virQEMUDriverPtr driver,
virDomainObjPtr vm)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
int ret = -1;
if (!priv->libDir &&
virAsprintf(&priv->libDir, "%s/domain-%s",
cfg->libDir, vm->def->name) < 0)
goto cleanup;
if (!priv->channelTargetDir &&
virAsprintf(&priv->channelTargetDir, "%s/domain-%s",
cfg->channelTargetDir, vm->def->name) < 0)
goto cleanup;
ret = 0;
cleanup:
virObjectUnref(cfg);
return ret;
}
int
qemuDomainSetPrivatePaths(virQEMUDriverPtr driver,
virDomainObjPtr vm)
{
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
qemuDomainObjPrivatePtr priv = vm->privateData;
char *domname = virDomainObjGetShortName(vm);
int ret = -1;
if (!domname)
goto cleanup;
if (!priv->libDir &&
virAsprintf(&priv->libDir, "%s/domain-%s", cfg->libDir, domname) < 0)
goto cleanup;
if (!priv->channelTargetDir &&
virAsprintf(&priv->channelTargetDir, "%s/domain-%s",
cfg->channelTargetDir, domname) < 0)
goto cleanup;
ret = 0;
cleanup:
virObjectUnref(cfg);
VIR_FREE(domname);
return ret;
}
void
qemuDomainClearPrivatePaths(virDomainObjPtr vm)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
VIR_FREE(priv->libDir);
VIR_FREE(priv->channelTargetDir);
}
static void *
qemuDomainObjPrivateAlloc(void)
{
qemuDomainObjPrivatePtr priv;
if (VIR_ALLOC(priv) < 0)
return NULL;
if (qemuDomainObjInitJob(priv) < 0) {
virReportSystemError(errno, "%s",
_("Unable to init qemu driver mutexes"));
goto error;
}
if (!(priv->devs = virChrdevAlloc()))
goto error;
priv->migMaxBandwidth = QEMU_DOMAIN_MIG_BANDWIDTH_MAX;
return priv;
error:
VIR_FREE(priv);
return NULL;
}
static void
qemuDomainObjPrivateFree(void *data)
{
qemuDomainObjPrivatePtr priv = data;
virObjectUnref(priv->qemuCaps);
virCgroupFree(&priv->cgroup);
virDomainPCIAddressSetFree(priv->pciaddrs);
virDomainCCWAddressSetFree(priv->ccwaddrs);
virDomainVirtioSerialAddrSetFree(priv->vioserialaddrs);
virDomainChrSourceDefFree(priv->monConfig);
qemuDomainObjFreeJob(priv);
VIR_FREE(priv->vcpupids);
VIR_FREE(priv->lockState);
VIR_FREE(priv->origname);
virStringFreeList(priv->qemuDevices);
virChrdevFree(priv->devs);
/* This should never be non-NULL if we get here, but just in case... */
if (priv->mon) {
VIR_ERROR(_("Unexpected QEMU monitor still active during domain deletion"));
qemuMonitorClose(priv->mon);
}
if (priv->agent) {
VIR_ERROR(_("Unexpected QEMU agent still active during domain deletion"));
qemuAgentClose(priv->agent);
}
VIR_FREE(priv->cleanupCallbacks);
virBitmapFree(priv->autoNodeset);
virBitmapFree(priv->autoCpuset);
VIR_FREE(priv->libDir);
VIR_FREE(priv->channelTargetDir);
VIR_FREE(priv);
}
static int
qemuDomainObjPrivateXMLFormat(virBufferPtr buf,
virDomainObjPtr vm)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
const char *monitorpath;
qemuDomainJob job;
/* priv->monitor_chr is set only for qemu */
if (priv->monConfig) {
switch (priv->monConfig->type) {
case VIR_DOMAIN_CHR_TYPE_UNIX:
monitorpath = priv->monConfig->data.nix.path;
break;
default:
case VIR_DOMAIN_CHR_TYPE_PTY:
monitorpath = priv->monConfig->data.file.path;
break;
}
virBufferEscapeString(buf, "<monitor path='%s'", monitorpath);
if (priv->monJSON)
virBufferAddLit(buf, " json='1'");
virBufferAsprintf(buf, " type='%s'/>\n",
virDomainChrTypeToString(priv->monConfig->type));
}
if (priv->nvcpupids) {
size_t i;
virBufferAddLit(buf, "<vcpus>\n");
virBufferAdjustIndent(buf, 2);
for (i = 0; i < priv->nvcpupids; i++)
virBufferAsprintf(buf, "<vcpu pid='%d'/>\n", priv->vcpupids[i]);
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</vcpus>\n");
}
if (priv->qemuCaps) {
size_t i;
virBufferAddLit(buf, "<qemuCaps>\n");
virBufferAdjustIndent(buf, 2);
for (i = 0; i < QEMU_CAPS_LAST; i++) {
if (virQEMUCapsGet(priv->qemuCaps, i)) {
virBufferAsprintf(buf, "<flag name='%s'/>\n",
virQEMUCapsTypeToString(i));
}
}
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</qemuCaps>\n");
}
if (priv->lockState)
virBufferAsprintf(buf, "<lockstate>%s</lockstate>\n", priv->lockState);
job = priv->job.active;
if (!qemuDomainTrackJob(job))
priv->job.active = QEMU_JOB_NONE;
if (priv->job.active || priv->job.asyncJob) {
virBufferAsprintf(buf, "<job type='%s' async='%s'",
qemuDomainJobTypeToString(priv->job.active),
qemuDomainAsyncJobTypeToString(priv->job.asyncJob));
if (priv->job.phase) {
virBufferAsprintf(buf, " phase='%s'",
qemuDomainAsyncJobPhaseToString(
priv->job.asyncJob, priv->job.phase));
}
if (priv->job.asyncJob != QEMU_ASYNC_JOB_MIGRATION_OUT) {
virBufferAddLit(buf, "/>\n");
} else {
size_t i;
virDomainDiskDefPtr disk;
qemuDomainDiskPrivatePtr diskPriv;
virBufferAddLit(buf, ">\n");
virBufferAdjustIndent(buf, 2);
for (i = 0; i < vm->def->ndisks; i++) {
disk = vm->def->disks[i];
diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk);
virBufferAsprintf(buf, "<disk dev='%s' migrating='%s'/>\n",
disk->dst,
diskPriv->migrating ? "yes" : "no");
}
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</job>\n");
}
}
priv->job.active = job;
if (priv->fakeReboot)
virBufferAddLit(buf, "<fakereboot/>\n");
if (priv->qemuDevices && *priv->qemuDevices) {
char **tmp = priv->qemuDevices;
virBufferAddLit(buf, "<devices>\n");
virBufferAdjustIndent(buf, 2);
while (*tmp) {
virBufferAsprintf(buf, "<device alias='%s'/>\n", *tmp);
tmp++;
}
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</devices>\n");
}
if (priv->autoNodeset) {
char *nodeset = virBitmapFormat(priv->autoNodeset);
if (!nodeset)
return -1;
virBufferAsprintf(buf, "<numad nodeset='%s'/>\n", nodeset);
VIR_FREE(nodeset);
}
/* Various per-domain paths */
virBufferEscapeString(buf, "<libDir path='%s'/>\n", priv->libDir);
virBufferEscapeString(buf, "<channelTargetDir path='%s'/>\n",
priv->channelTargetDir);
return 0;
}
static int
qemuDomainObjPrivateXMLParse(xmlXPathContextPtr ctxt,
virDomainObjPtr vm,
virDomainDefParserConfigPtr config)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
virQEMUDriverPtr driver = config->priv;
char *monitorpath;
char *tmp = NULL;
int n;
size_t i;
xmlNodePtr *nodes = NULL;
virQEMUCapsPtr qemuCaps = NULL;
virCapsPtr caps = NULL;
if (VIR_ALLOC(priv->monConfig) < 0)
goto error;
if (!(monitorpath =
virXPathString("string(./monitor[1]/@path)", ctxt))) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("no monitor path"));
goto error;
}
tmp = virXPathString("string(./monitor[1]/@type)", ctxt);
if (tmp)
priv->monConfig->type = virDomainChrTypeFromString(tmp);
else
priv->monConfig->type = VIR_DOMAIN_CHR_TYPE_PTY;
VIR_FREE(tmp);
priv->monJSON = virXPathBoolean("count(./monitor[@json = '1']) > 0",
ctxt) > 0;
switch (priv->monConfig->type) {
case VIR_DOMAIN_CHR_TYPE_PTY:
priv->monConfig->data.file.path = monitorpath;
break;
case VIR_DOMAIN_CHR_TYPE_UNIX:
priv->monConfig->data.nix.path = monitorpath;
break;
default:
VIR_FREE(monitorpath);
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unsupported monitor type '%s'"),
virDomainChrTypeToString(priv->monConfig->type));
goto error;
}
n = virXPathNodeSet("./vcpus/vcpu", ctxt, &nodes);
if (n < 0)
goto error;
if (n) {
priv->nvcpupids = n;
if (VIR_REALLOC_N(priv->vcpupids, priv->nvcpupids) < 0)
goto error;
for (i = 0; i < n; i++) {
char *pidstr = virXMLPropString(nodes[i], "pid");
if (!pidstr)
goto error;
if (virStrToLong_i(pidstr, NULL, 10, &(priv->vcpupids[i])) < 0) {
VIR_FREE(pidstr);
goto error;
}
VIR_FREE(pidstr);
}
VIR_FREE(nodes);
}
if ((n = virXPathNodeSet("./qemuCaps/flag", ctxt, &nodes)) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("failed to parse qemu capabilities flags"));
goto error;
}
if (n > 0) {
if (!(qemuCaps = virQEMUCapsNew()))
goto error;
for (i = 0; i < n; i++) {
char *str = virXMLPropString(nodes[i], "name");
if (str) {
int flag = virQEMUCapsTypeFromString(str);
if (flag < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unknown qemu capabilities flag %s"), str);
VIR_FREE(str);
goto error;
}
VIR_FREE(str);
virQEMUCapsSet(qemuCaps, flag);
}
}
priv->qemuCaps = qemuCaps;
qemuCaps = NULL;
}
VIR_FREE(nodes);
priv->lockState = virXPathString("string(./lockstate)", ctxt);
if ((tmp = virXPathString("string(./job[1]/@type)", ctxt))) {
int type;
if ((type = qemuDomainJobTypeFromString(tmp)) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unknown job type %s"), tmp);
VIR_FREE(tmp);
goto error;
}
VIR_FREE(tmp);
priv->job.active = type;
}
if ((tmp = virXPathString("string(./job[1]/@async)", ctxt))) {
int async;
if ((async = qemuDomainAsyncJobTypeFromString(tmp)) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unknown async job type %s"), tmp);
VIR_FREE(tmp);
goto error;
}
VIR_FREE(tmp);
priv->job.asyncJob = async;
if ((tmp = virXPathString("string(./job[1]/@phase)", ctxt))) {
priv->job.phase = qemuDomainAsyncJobPhaseFromString(async, tmp);
if (priv->job.phase < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unknown job phase %s"), tmp);
VIR_FREE(tmp);
goto error;
}
VIR_FREE(tmp);
}
}
if ((n = virXPathNodeSet("./job[1]/disk[@migrating='yes']",
ctxt, &nodes)) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to parse list of disks marked for migration"));
goto error;
}
if (n > 0) {
if (priv->job.asyncJob != QEMU_ASYNC_JOB_MIGRATION_OUT) {
VIR_WARN("Found disks marked for migration but we were not "
"migrating");
n = 0;
}
for (i = 0; i < n; i++) {
char *dst = virXMLPropString(nodes[i], "dev");
virDomainDiskDefPtr disk;
if (dst && (disk = virDomainDiskByName(vm->def, dst, false)))
QEMU_DOMAIN_DISK_PRIVATE(disk)->migrating = true;
VIR_FREE(dst);
}
}
VIR_FREE(nodes);
priv->fakeReboot = virXPathBoolean("boolean(./fakereboot)", ctxt) == 1;
if ((n = virXPathNodeSet("./devices/device", ctxt, &nodes)) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to parse qemu device list"));
goto error;
}
if (n > 0) {
/* NULL-terminated list */
if (VIR_ALLOC_N(priv->qemuDevices, n + 1) < 0)
goto error;
for (i = 0; i < n; i++) {
priv->qemuDevices[i] = virXMLPropString(nodes[i], "alias");
if (!priv->qemuDevices[i]) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to parse qemu device list"));
goto error;
}
}
}
VIR_FREE(nodes);
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto error;
if ((tmp = virXPathString("string(./numad/@nodeset)", ctxt))) {
if (virBitmapParse(tmp, 0, &priv->autoNodeset,
caps->host.nnumaCell_max) < 0)
goto error;
if (!(priv->autoCpuset = virCapabilitiesGetCpusForNodemask(caps,
priv->autoNodeset)))
goto error;
}
virObjectUnref(caps);
VIR_FREE(tmp);
if ((tmp = virXPathString("string(./libDir/@path)", ctxt)))
priv->libDir = tmp;
if ((tmp = virXPathString("string(./channelTargetDir/@path)", ctxt)))
priv->channelTargetDir = tmp;
tmp = NULL;
if (qemuDomainSetPrivatePathsOld(driver, vm) < 0)
goto error;
return 0;
error:
virDomainChrSourceDefFree(priv->monConfig);
priv->monConfig = NULL;
VIR_FREE(nodes);
VIR_FREE(tmp);
virStringFreeList(priv->qemuDevices);
priv->qemuDevices = NULL;
virObjectUnref(qemuCaps);
virObjectUnref(caps);
return -1;
}
virDomainXMLPrivateDataCallbacks virQEMUDriverPrivateDataCallbacks = {
.alloc = qemuDomainObjPrivateAlloc,
.free = qemuDomainObjPrivateFree,
.diskNew = qemuDomainDiskPrivateNew,
.hostdevNew = qemuDomainHostdevPrivateNew,
.parse = qemuDomainObjPrivateXMLParse,
.format = qemuDomainObjPrivateXMLFormat,
};
static void
qemuDomainDefNamespaceFree(void *nsdata)
{
qemuDomainCmdlineDefPtr cmd = nsdata;
qemuDomainCmdlineDefFree(cmd);
}
static int
qemuDomainDefNamespaceParse(xmlDocPtr xml ATTRIBUTE_UNUSED,
xmlNodePtr root ATTRIBUTE_UNUSED,
xmlXPathContextPtr ctxt,
void **data)
{
qemuDomainCmdlineDefPtr cmd = NULL;
bool uses_qemu_ns = false;
xmlNodePtr *nodes = NULL;
int n;
size_t i;
if (xmlXPathRegisterNs(ctxt, BAD_CAST "qemu", BAD_CAST QEMU_NAMESPACE_HREF) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to register xml namespace '%s'"),
QEMU_NAMESPACE_HREF);
return -1;
}
if (VIR_ALLOC(cmd) < 0)
return -1;
/* first handle the extra command-line arguments */
n = virXPathNodeSet("./qemu:commandline/qemu:arg", ctxt, &nodes);
if (n < 0)
goto error;
uses_qemu_ns |= n > 0;
if (n && VIR_ALLOC_N(cmd->args, n) < 0)
goto error;
for (i = 0; i < n; i++) {
cmd->args[cmd->num_args] = virXMLPropString(nodes[i], "value");
if (cmd->args[cmd->num_args] == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("No qemu command-line argument specified"));
goto error;
}
cmd->num_args++;
}
VIR_FREE(nodes);
/* now handle the extra environment variables */
n = virXPathNodeSet("./qemu:commandline/qemu:env", ctxt, &nodes);
if (n < 0)
goto error;
uses_qemu_ns |= n > 0;
if (n && VIR_ALLOC_N(cmd->env_name, n) < 0)
goto error;
if (n && VIR_ALLOC_N(cmd->env_value, n) < 0)
goto error;
for (i = 0; i < n; i++) {
char *tmp;
tmp = virXMLPropString(nodes[i], "name");
if (tmp == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("No qemu environment name specified"));
goto error;
}
if (tmp[0] == '\0') {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Empty qemu environment name specified"));
goto error;
}
if (!c_isalpha(tmp[0]) && tmp[0] != '_') {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Invalid environment name, it must begin with a letter or underscore"));
goto error;
}
if (strspn(tmp, "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_") != strlen(tmp)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("Invalid environment name, it must contain only alphanumerics and underscore"));
goto error;
}
cmd->env_name[cmd->num_env] = tmp;
cmd->env_value[cmd->num_env] = virXMLPropString(nodes[i], "value");
/* a NULL value for command is allowed, since it might be empty */
cmd->num_env++;
}
VIR_FREE(nodes);
if (uses_qemu_ns)
*data = cmd;
else
VIR_FREE(cmd);
return 0;
error:
VIR_FREE(nodes);
qemuDomainDefNamespaceFree(cmd);
return -1;
}
static int
qemuDomainDefNamespaceFormatXML(virBufferPtr buf,
void *nsdata)
{
qemuDomainCmdlineDefPtr cmd = nsdata;
size_t i;
if (!cmd->num_args && !cmd->num_env)
return 0;
virBufferAddLit(buf, "<qemu:commandline>\n");
virBufferAdjustIndent(buf, 2);
for (i = 0; i < cmd->num_args; i++)
virBufferEscapeString(buf, "<qemu:arg value='%s'/>\n",
cmd->args[i]);
for (i = 0; i < cmd->num_env; i++) {
virBufferAsprintf(buf, "<qemu:env name='%s'", cmd->env_name[i]);
if (cmd->env_value[i])
virBufferEscapeString(buf, " value='%s'", cmd->env_value[i]);
virBufferAddLit(buf, "/>\n");
}
virBufferAdjustIndent(buf, -2);
virBufferAddLit(buf, "</qemu:commandline>\n");
return 0;
}
static const char *
qemuDomainDefNamespaceHref(void)
{
return "xmlns:qemu='" QEMU_NAMESPACE_HREF "'";
}
virDomainXMLNamespace virQEMUDriverDomainXMLNamespace = {
.parse = qemuDomainDefNamespaceParse,
.free = qemuDomainDefNamespaceFree,
.format = qemuDomainDefNamespaceFormatXML,
.href = qemuDomainDefNamespaceHref,
};
static int
qemuDomainDefAddImplicitInputDevice(virDomainDef *def)
{
if (ARCH_IS_X86(def->os.arch)) {
if (virDomainDefMaybeAddInput(def,
VIR_DOMAIN_INPUT_TYPE_MOUSE,
VIR_DOMAIN_INPUT_BUS_PS2) < 0)
return -1;
if (virDomainDefMaybeAddInput(def,
VIR_DOMAIN_INPUT_TYPE_KBD,
VIR_DOMAIN_INPUT_BUS_PS2) < 0)
return -1;
}
return 0;
}
static int
qemuDomainDefAddDefaultDevices(virDomainDefPtr def,
virQEMUCapsPtr qemuCaps)
{
bool addDefaultUSB = true;
int usbModel = -1; /* "default for machinetype" */
int pciRoot; /* index within def->controllers */
bool addImplicitSATA = false;
bool addPCIRoot = false;
bool addPCIeRoot = false;
bool addDefaultMemballoon = true;
bool addDefaultUSBKBD = false;
bool addDefaultUSBMouse = false;
bool addPanicDevice = false;
int ret = -1;
/* add implicit input devices */
if (qemuDomainDefAddImplicitInputDevice(def) < 0)
goto cleanup;
/* Add implicit PCI root controller if the machine has one */
switch (def->os.arch) {
case VIR_ARCH_I686:
case VIR_ARCH_X86_64:
if (STREQ(def->os.machine, "isapc")) {
addDefaultUSB = false;
break;
}
if (qemuDomainMachineIsQ35(def)) {
addPCIeRoot = true;
addImplicitSATA = true;
/* add a USB2 controller set, but only if the
* ich9-usb-ehci1 device is supported
*/
if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_ICH9_USB_EHCI1))
usbModel = VIR_DOMAIN_CONTROLLER_MODEL_USB_ICH9_EHCI1;
else
addDefaultUSB = false;
break;
}
if (qemuDomainMachineIsI440FX(def))
addPCIRoot = true;
break;
case VIR_ARCH_ARMV7L:
case VIR_ARCH_AARCH64:
addDefaultUSB = false;
addDefaultMemballoon = false;
if (qemuDomainMachineIsVirt(def))
addPCIeRoot = virQEMUCapsGet(qemuCaps, QEMU_CAPS_OBJECT_GPEX);
break;
case VIR_ARCH_PPC64:
case VIR_ARCH_PPC64LE:
addPCIRoot = true;
addDefaultUSBKBD = true;
addDefaultUSBMouse = true;
/* For pSeries guests, the firmware provides the same
* functionality as the pvpanic device, so automatically
* add the definition if not already present */
if (STRPREFIX(def->os.machine, "pseries"))
addPanicDevice = true;
break;
case VIR_ARCH_ALPHA:
case VIR_ARCH_PPC:
case VIR_ARCH_PPCEMB:
case VIR_ARCH_SH4:
case VIR_ARCH_SH4EB:
addPCIRoot = true;
break;
case VIR_ARCH_S390:
case VIR_ARCH_S390X:
addDefaultUSB = false;
addPanicDevice = true;
break;
case VIR_ARCH_SPARC:
case VIR_ARCH_SPARC64:
addPCIRoot = true;
break;
default:
break;
}
if (addDefaultUSB &&
virDomainControllerFind(def, VIR_DOMAIN_CONTROLLER_TYPE_USB, 0) < 0 &&
virDomainDefAddUSBController(def, 0, usbModel) < 0)
goto cleanup;
if (addImplicitSATA &&
virDomainDefMaybeAddController(
def, VIR_DOMAIN_CONTROLLER_TYPE_SATA, 0, -1) < 0)
goto cleanup;
pciRoot = virDomainControllerFind(def, VIR_DOMAIN_CONTROLLER_TYPE_PCI, 0);
/* NB: any machine that sets addPCIRoot to true must also return
* true from the function qemuDomainSupportsPCI().
*/
if (addPCIRoot) {
if (pciRoot >= 0) {
if (def->controllers[pciRoot]->model != VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT) {
virReportError(VIR_ERR_XML_ERROR,
_("The PCI controller with index='0' must be "
"model='pci-root' for this machine type, "
"but model='%s' was found instead"),
virDomainControllerModelPCITypeToString(def->controllers[pciRoot]->model));
goto cleanup;
}
} else if (!virDomainDefAddController(def, VIR_DOMAIN_CONTROLLER_TYPE_PCI, 0,
VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT)) {
goto cleanup;
}
}
/* When a machine has a pcie-root, make sure that there is always
* a dmi-to-pci-bridge controller added as bus 1, and a pci-bridge
* as bus 2, so that standard PCI devices can be connected
*
* NB: any machine that sets addPCIeRoot to true must also return
* true from the function qemuDomainSupportsPCI().
*/
if (addPCIeRoot) {
if (pciRoot >= 0) {
if (def->controllers[pciRoot]->model != VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT) {
virReportError(VIR_ERR_XML_ERROR,
_("The PCI controller with index='0' must be "
"model='pcie-root' for this machine type, "
"but model='%s' was found instead"),
virDomainControllerModelPCITypeToString(def->controllers[pciRoot]->model));
goto cleanup;
}
} else if (!virDomainDefAddController(def, VIR_DOMAIN_CONTROLLER_TYPE_PCI, 0,
VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT)) {
goto cleanup;
}
if (virDomainDefMaybeAddController(
def, VIR_DOMAIN_CONTROLLER_TYPE_PCI, 1,
VIR_DOMAIN_CONTROLLER_MODEL_DMI_TO_PCI_BRIDGE) < 0 ||
virDomainDefMaybeAddController(
def, VIR_DOMAIN_CONTROLLER_TYPE_PCI, 2,
VIR_DOMAIN_CONTROLLER_MODEL_PCI_BRIDGE) < 0) {
goto cleanup;
}
}
if (addDefaultMemballoon && !def->memballoon) {
virDomainMemballoonDefPtr memballoon;
if (VIR_ALLOC(memballoon) < 0)
goto cleanup;
memballoon->model = VIR_DOMAIN_MEMBALLOON_MODEL_VIRTIO;
def->memballoon = memballoon;
}
if (addDefaultUSBKBD &&
def->ngraphics > 0 &&
virDomainDefMaybeAddInput(def,
VIR_DOMAIN_INPUT_TYPE_KBD,
VIR_DOMAIN_INPUT_BUS_USB) < 0)
goto cleanup;
if (addDefaultUSBMouse &&
def->ngraphics > 0 &&
virDomainDefMaybeAddInput(def,
VIR_DOMAIN_INPUT_TYPE_MOUSE,
VIR_DOMAIN_INPUT_BUS_USB) < 0)
goto cleanup;
if (addPanicDevice) {
size_t j;
for (j = 0; j < def->npanics; j++) {
if (def->panics[j]->model == VIR_DOMAIN_PANIC_MODEL_DEFAULT ||
(ARCH_IS_PPC64(def->os.arch) &&
def->panics[j]->model == VIR_DOMAIN_PANIC_MODEL_PSERIES) ||
(ARCH_IS_S390(def->os.arch) &&
def->panics[j]->model == VIR_DOMAIN_PANIC_MODEL_S390))
break;
}
if (j == def->npanics) {
virDomainPanicDefPtr panic;
if (VIR_ALLOC(panic) < 0 ||
VIR_APPEND_ELEMENT_COPY(def->panics,
def->npanics, panic) < 0) {
VIR_FREE(panic);
goto cleanup;
}
}
}
ret = 0;
cleanup:
return ret;
}
/**
* qemuDomainDefEnableDefaultFeatures:
* @def: domain definition
* @qemuCaps: QEMU capabilities
*
* Make sure that features that should be enabled by default are actually
* enabled and configure default values related to those features.
*/
static void
qemuDomainDefEnableDefaultFeatures(virDomainDefPtr def,
virQEMUCapsPtr qemuCaps)
{
virGICVersion version;
/* The virt machine type always uses GIC: if the relevant element
* was not included in the domain XML, we need to choose a suitable
* GIC version ourselves */
if (def->features[VIR_DOMAIN_FEATURE_GIC] == VIR_TRISTATE_SWITCH_ABSENT &&
(def->os.arch == VIR_ARCH_ARMV7L || def->os.arch == VIR_ARCH_AARCH64) &&
qemuDomainMachineIsVirt(def)) {
VIR_DEBUG("Looking for usable GIC version in domain capabilities");
for (version = VIR_GIC_VERSION_LAST - 1;
version > VIR_GIC_VERSION_NONE;
version--) {
if (virQEMUCapsSupportsGICVersion(qemuCaps,
def->virtType,
version)) {
VIR_DEBUG("Using GIC version %s",
virGICVersionTypeToString(version));
def->gic_version = version;
break;
}
}
/* Even if we haven't found a usable GIC version in the domain
* capabilities, we still want to enable this */
def->features[VIR_DOMAIN_FEATURE_GIC] = VIR_TRISTATE_SWITCH_ON;
}
/* Use the default GIC version if no version was specified */
if (def->features[VIR_DOMAIN_FEATURE_GIC] == VIR_TRISTATE_SWITCH_ON &&
def->gic_version == VIR_GIC_VERSION_NONE)
def->gic_version = VIR_GIC_VERSION_DEFAULT;
}
static int
qemuCanonicalizeMachine(virDomainDefPtr def, virQEMUCapsPtr qemuCaps)
{
const char *canon;
if (!(canon = virQEMUCapsGetCanonicalMachine(qemuCaps, def->os.machine)))
return 0;
if (STRNEQ(canon, def->os.machine)) {
char *tmp;
if (VIR_STRDUP(tmp, canon) < 0)
return -1;
VIR_FREE(def->os.machine);
def->os.machine = tmp;
}
return 0;
}
static int
qemuDomainRecheckInternalPaths(virDomainDefPtr def,
virQEMUDriverConfigPtr cfg,
unsigned int flags)
{
size_t i = 0;
size_t j = 0;
for (i = 0; i < def->ngraphics; ++i) {
virDomainGraphicsDefPtr graphics = def->graphics[i];
for (j = 0; j < graphics->nListens; ++j) {
virDomainGraphicsListenDefPtr glisten = &graphics->listens[j];
/* This will happen only if we parse XML from old libvirts where
* unix socket was available only for VNC graphics. In this
* particular case we should follow the behavior and if we remove
* the auto-generated socket base on config option from qemu.conf
* we need to change the listen type to address. */
if (graphics->type == VIR_DOMAIN_GRAPHICS_TYPE_VNC &&
glisten->type == VIR_DOMAIN_GRAPHICS_LISTEN_TYPE_SOCKET &&
glisten->socket &&
STRPREFIX(glisten->socket, cfg->libDir)) {
if (flags & VIR_DOMAIN_DEF_PARSE_INACTIVE) {
VIR_FREE(glisten->socket);
glisten->type = VIR_DOMAIN_GRAPHICS_LISTEN_TYPE_ADDRESS;
} else {
glisten->fromConfig = true;
}
}
}
}
return 0;
}
static int
qemuDomainDefPostParse(virDomainDefPtr def,
virCapsPtr caps,
unsigned int parseFlags,
void *opaque)
{
virQEMUDriverPtr driver = opaque;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
virQEMUCapsPtr qemuCaps = NULL;
int ret = -1;
if (def->os.bootloader || def->os.bootloaderArgs) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("bootloader is not supported by QEMU"));
return ret;
}
if (!def->os.machine) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("missing machine type"));
return ret;
}
if (def->os.loader &&
def->os.loader->type == VIR_DOMAIN_LOADER_TYPE_PFLASH &&
def->os.loader->readonly == VIR_TRISTATE_SWITCH_ON &&
!def->os.loader->nvram) {
if (virAsprintf(&def->os.loader->nvram, "%s/%s_VARS.fd",
cfg->nvramDir, def->name) < 0)
goto cleanup;
}
/* check for emulator and create a default one if needed */
if (!def->emulator &&
!(def->emulator = virDomainDefGetDefaultEmulator(def, caps)))
return ret;
if (!(qemuCaps = virQEMUCapsCacheLookup(driver->qemuCapsCache,
def->emulator)))
goto cleanup;
if (qemuDomainDefAddDefaultDevices(def, qemuCaps) < 0)
goto cleanup;
if (qemuCanonicalizeMachine(def, qemuCaps) < 0)
goto cleanup;
qemuDomainDefEnableDefaultFeatures(def, qemuCaps);
if (qemuDomainRecheckInternalPaths(def, cfg, parseFlags) < 0)
goto cleanup;
if (virSecurityManagerVerify(driver->securityManager, def) < 0)
goto cleanup;
ret = 0;
cleanup:
virObjectUnref(qemuCaps);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainDefValidate(const virDomainDef *def,
virCapsPtr caps ATTRIBUTE_UNUSED,
void *opaque ATTRIBUTE_UNUSED)
{
if (def->mem.min_guarantee) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("Parameter 'min_guarantee' not supported by QEMU."));
return -1;
}
return 0;
}
static const char *
qemuDomainDefaultNetModel(const virDomainDef *def,
virQEMUCapsPtr qemuCaps)
{
if (ARCH_IS_S390(def->os.arch))
return "virtio";
if (def->os.arch == VIR_ARCH_ARMV7L ||
def->os.arch == VIR_ARCH_AARCH64) {
if (STREQ(def->os.machine, "versatilepb"))
return "smc91c111";
if (qemuDomainMachineIsVirt(def))
return "virtio";
/* Incomplete. vexpress (and a few others) use this, but not all
* arm boards */
return "lan9118";
}
/* Try several network devices in turn; each of these devices is
* less likely be supported out-of-the-box by the guest operating
* system than the previous one */
if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_RTL8139))
return "rtl8139";
else if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_E1000))
return "e1000";
else if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_VIRTIO_NET))
return "virtio";
/* We've had no luck detecting support for any network device,
* but we have to return something: might as well be rtl8139 */
return "rtl8139";
}
static int
qemuDomainDeviceDefPostParse(virDomainDeviceDefPtr dev,
const virDomainDef *def,
virCapsPtr caps ATTRIBUTE_UNUSED,
unsigned int parseFlags,
void *opaque)
{
virQEMUDriverPtr driver = opaque;
virQEMUCapsPtr qemuCaps = NULL;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
int ret = -1;
qemuCaps = virQEMUCapsCacheLookup(driver->qemuCapsCache, def->emulator);
if (dev->type == VIR_DOMAIN_DEVICE_NET &&
dev->data.net->type != VIR_DOMAIN_NET_TYPE_HOSTDEV &&
!dev->data.net->model) {
if (VIR_STRDUP(dev->data.net->model,
qemuDomainDefaultNetModel(def, qemuCaps)) < 0)
goto cleanup;
}
/* set default disk types and drivers */
if (dev->type == VIR_DOMAIN_DEVICE_DISK) {
virDomainDiskDefPtr disk = dev->data.disk;
/* assign default storage format and driver according to config */
if (cfg->allowDiskFormatProbing) {
/* default disk format for drives */
if (virDomainDiskGetFormat(disk) == VIR_STORAGE_FILE_NONE &&
(virDomainDiskGetType(disk) == VIR_STORAGE_TYPE_FILE ||
virDomainDiskGetType(disk) == VIR_STORAGE_TYPE_BLOCK))
virDomainDiskSetFormat(disk, VIR_STORAGE_FILE_AUTO);
/* default disk format for mirrored drive */
if (disk->mirror &&
disk->mirror->format == VIR_STORAGE_FILE_NONE)
disk->mirror->format = VIR_STORAGE_FILE_AUTO;
} else {
/* default driver if probing is forbidden */
if (!virDomainDiskGetDriver(disk) &&
virDomainDiskSetDriver(disk, "qemu") < 0)
goto cleanup;
/* default disk format for drives */
if (virDomainDiskGetFormat(disk) == VIR_STORAGE_FILE_NONE &&
(virDomainDiskGetType(disk) == VIR_STORAGE_TYPE_FILE ||
virDomainDiskGetType(disk) == VIR_STORAGE_TYPE_BLOCK))
virDomainDiskSetFormat(disk, VIR_STORAGE_FILE_RAW);
/* default disk format for mirrored drive */
if (disk->mirror &&
disk->mirror->format == VIR_STORAGE_FILE_NONE)
disk->mirror->format = VIR_STORAGE_FILE_RAW;
}
}
/* set the default console type for S390 arches */
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 &&
ARCH_IS_S390(def->os.arch))
dev->data.chr->targetType = VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_VIRTIO;
/* set the default USB model to none for s390 unless an address is found */
if (dev->type == VIR_DOMAIN_DEVICE_CONTROLLER &&
dev->data.controller->type == VIR_DOMAIN_CONTROLLER_TYPE_USB &&
dev->data.controller->model == -1 &&
dev->data.controller->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE &&
ARCH_IS_S390(def->os.arch))
dev->data.controller->model = VIR_DOMAIN_CONTROLLER_MODEL_USB_NONE;
/* set the default SCSI controller model for S390 arches */
if (dev->type == VIR_DOMAIN_DEVICE_CONTROLLER &&
dev->data.controller->type == VIR_DOMAIN_CONTROLLER_TYPE_SCSI &&
dev->data.controller->model == -1 &&
ARCH_IS_S390(def->os.arch))
dev->data.controller->model = VIR_DOMAIN_CONTROLLER_MODEL_SCSI_VIRTIO_SCSI;
/* clear auto generated unix socket path for inactive definitions */
if ((parseFlags & VIR_DOMAIN_DEF_PARSE_INACTIVE) &&
dev->type == VIR_DOMAIN_DEVICE_CHR &&
dev->data.chr->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_CHANNEL &&
dev->data.chr->targetType == VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_VIRTIO &&
dev->data.chr->source.type == VIR_DOMAIN_CHR_TYPE_UNIX &&
dev->data.chr->source.data.nix.path &&
STRPREFIX(dev->data.chr->source.data.nix.path, cfg->channelTargetDir)) {
/*
* If the address is generated by us (starts with our
* channel dir), we should not keep it in the persistent
* XML. If libvirt is the one who generated it, users
* shouldn't care about that. If they do, they are
* supposed to set it themselves.
*/
VIR_FREE(dev->data.chr->source.data.nix.path);
}
/* forbid capabilities mode hostdev in this kind of hypervisor */
if (dev->type == VIR_DOMAIN_DEVICE_HOSTDEV &&
dev->data.hostdev->mode == VIR_DOMAIN_HOSTDEV_MODE_CAPABILITIES) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("hostdev mode 'capabilities' is not "
"supported in %s"),
virDomainVirtTypeToString(def->virtType));
goto cleanup;
}
if (dev->type == VIR_DOMAIN_DEVICE_VIDEO &&
dev->data.video->type == VIR_DOMAIN_VIDEO_TYPE_QXL) {
if (dev->data.video->vgamem) {
if (dev->data.video->vgamem < 1024) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("value for 'vgamem' must be at least 1 MiB "
"(1024 KiB)"));
goto cleanup;
}
if (dev->data.video->vgamem != VIR_ROUND_UP_POWER_OF_TWO(dev->data.video->vgamem)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("value for 'vgamem' must be power of two"));
goto cleanup;
}
} else {
dev->data.video->vgamem = QEMU_QXL_VGAMEM_DEFAULT;
}
}
if (dev->type == VIR_DOMAIN_DEVICE_PANIC &&
dev->data.panic->model == VIR_DOMAIN_PANIC_MODEL_DEFAULT) {
if (ARCH_IS_PPC64(def->os.arch) &&
STRPREFIX(def->os.machine, "pseries"))
dev->data.panic->model = VIR_DOMAIN_PANIC_MODEL_PSERIES;
else if (ARCH_IS_S390(def->os.arch))
dev->data.panic->model = VIR_DOMAIN_PANIC_MODEL_S390;
else
dev->data.panic->model = VIR_DOMAIN_PANIC_MODEL_ISA;
}
if (dev->type == VIR_DOMAIN_DEVICE_CONTROLLER) {
virDomainControllerDefPtr cont = dev->data.controller;
if (cont->type == VIR_DOMAIN_CONTROLLER_TYPE_PCI) {
if (cont->model == VIR_DOMAIN_CONTROLLER_MODEL_PCI_EXPANDER_BUS &&
!qemuDomainMachineIsI440FX(def)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("pci-expander-bus controllers are only supported "
"on 440fx-based machinetypes"));
goto cleanup;
}
if (cont->model == VIR_DOMAIN_CONTROLLER_MODEL_PCIE_EXPANDER_BUS &&
!qemuDomainMachineIsQ35(def)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("pcie-expander-bus controllers are only supported "
"on q35-based machinetypes"));
goto cleanup;
}
/* if a PCI expander bus has a NUMA node set, make sure
* that NUMA node is configured in the guest <cpu><numa>
* array. NUMA cell id's in this array are numbered
* from 0 .. size-1.
*/
if ((cont->model == VIR_DOMAIN_CONTROLLER_MODEL_PCI_EXPANDER_BUS ||
cont->model == VIR_DOMAIN_CONTROLLER_MODEL_PCIE_EXPANDER_BUS) &&
(int) virDomainNumaGetNodeCount(def->numa)
<= cont->opts.pciopts.numaNode) {
virReportError(VIR_ERR_XML_ERROR,
_("%s with index %d is "
"configured for a NUMA node (%d) "
"not present in the domain's "
"<cpu><numa> array (%zu)"),
virDomainControllerModelPCITypeToString(cont->model),
cont->idx, cont->opts.pciopts.numaNode,
virDomainNumaGetNodeCount(def->numa));
goto cleanup;
}
}
}
ret = 0;
cleanup:
virObjectUnref(qemuCaps);
virObjectUnref(cfg);
return ret;
}
static int
qemuDomainDefAssignAddresses(virDomainDef *def,
virCapsPtr caps ATTRIBUTE_UNUSED,
unsigned int parseFlags ATTRIBUTE_UNUSED,
void *opaque)
{
virQEMUDriverPtr driver = opaque;
virQEMUCapsPtr qemuCaps = NULL;
int ret = -1;
if (!(qemuCaps = virQEMUCapsCacheLookup(driver->qemuCapsCache,
def->emulator)))
goto cleanup;
if (qemuDomainAssignAddresses(def, qemuCaps, NULL) < 0)
goto cleanup;
ret = 0;
cleanup:
virObjectUnref(qemuCaps);
return ret;
}
virDomainDefParserConfig virQEMUDriverDomainDefParserConfig = {
.devicesPostParseCallback = qemuDomainDeviceDefPostParse,
.domainPostParseCallback = qemuDomainDefPostParse,
.assignAddressesCallback = qemuDomainDefAssignAddresses,
.domainValidateCallback = qemuDomainDefValidate,
.features = VIR_DOMAIN_DEF_FEATURE_MEMORY_HOTPLUG |
VIR_DOMAIN_DEF_FEATURE_OFFLINE_VCPUPIN
};
static void
qemuDomainObjSaveJob(virQEMUDriverPtr driver, virDomainObjPtr obj)
{
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
if (virDomainObjIsActive(obj)) {
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, obj, driver->caps) < 0)
VIR_WARN("Failed to save status on vm %s", obj->def->name);
}
virObjectUnref(cfg);
}
void
qemuDomainObjSetJobPhase(virQEMUDriverPtr driver,
virDomainObjPtr obj,
int phase)
{
qemuDomainObjPrivatePtr priv = obj->privateData;
unsigned long long me = virThreadSelfID();
if (!priv->job.asyncJob)
return;
VIR_DEBUG("Setting '%s' phase to '%s'",
qemuDomainAsyncJobTypeToString(priv->job.asyncJob),
qemuDomainAsyncJobPhaseToString(priv->job.asyncJob, phase));
if (priv->job.asyncOwner && me != priv->job.asyncOwner) {
VIR_WARN("'%s' async job is owned by thread %llu",
qemuDomainAsyncJobTypeToString(priv->job.asyncJob),
priv->job.asyncOwner);
}
priv->job.phase = phase;
priv->job.asyncOwner = me;
qemuDomainObjSaveJob(driver, obj);
}
void
qemuDomainObjSetAsyncJobMask(virDomainObjPtr obj,
unsigned long long allowedJobs)
{
qemuDomainObjPrivatePtr priv = obj->privateData;
if (!priv->job.asyncJob)
return;
priv->job.mask = allowedJobs | JOB_MASK(QEMU_JOB_DESTROY);
}
void
qemuDomainObjDiscardAsyncJob(virQEMUDriverPtr driver, virDomainObjPtr obj)
{
qemuDomainObjPrivatePtr priv = obj->privateData;
if (priv->job.active == QEMU_JOB_ASYNC_NESTED)
qemuDomainObjResetJob(priv);
qemuDomainObjResetAsyncJob(priv);
qemuDomainObjSaveJob(driver, obj);
}
void
qemuDomainObjReleaseAsyncJob(virDomainObjPtr obj)
{
qemuDomainObjPrivatePtr priv = obj->privateData;
VIR_DEBUG("Releasing ownership of '%s' async job",
qemuDomainAsyncJobTypeToString(priv->job.asyncJob));
if (priv->job.asyncOwner != virThreadSelfID()) {
VIR_WARN("'%s' async job is owned by thread %llu",
qemuDomainAsyncJobTypeToString(priv->job.asyncJob),
priv->job.asyncOwner);
}
priv->job.asyncOwner = 0;
}
static bool
qemuDomainNestedJobAllowed(qemuDomainObjPrivatePtr priv, qemuDomainJob job)
{
return !priv->job.asyncJob || (priv->job.mask & JOB_MASK(job)) != 0;
}
bool
qemuDomainJobAllowed(qemuDomainObjPrivatePtr priv, qemuDomainJob job)
{
return !priv->job.active && qemuDomainNestedJobAllowed(priv, job);
}
/* Give up waiting for mutex after 30 seconds */
#define QEMU_JOB_WAIT_TIME (1000ull * 30)
/*
* obj must be locked before calling
*/
static int ATTRIBUTE_NONNULL(1)
qemuDomainObjBeginJobInternal(virQEMUDriverPtr driver,
virDomainObjPtr obj,
qemuDomainJob job,
qemuDomainAsyncJob asyncJob)
{
qemuDomainObjPrivatePtr priv = obj->privateData;
unsigned long long now;
unsigned long long then;
bool nested = job == QEMU_JOB_ASYNC_NESTED;
bool async = job == QEMU_JOB_ASYNC;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
const char *blocker = NULL;
int ret = -1;
unsigned long long duration = 0;
unsigned long long asyncDuration = 0;
const char *jobStr;
if (async)
jobStr = qemuDomainAsyncJobTypeToString(asyncJob);
else
jobStr = qemuDomainJobTypeToString(job);
VIR_DEBUG("Starting %s: %s (vm=%p name=%s, current job=%s async=%s)",
async ? "async job" : "job", jobStr, obj, obj->def->name,
qemuDomainJobTypeToString(priv->job.active),
qemuDomainAsyncJobTypeToString(priv->job.asyncJob));
if (virTimeMillisNow(&now) < 0) {
virObjectUnref(cfg);
return -1;
}
priv->jobs_queued++;
then = now + QEMU_JOB_WAIT_TIME;
retry:
if (cfg->maxQueuedJobs &&
priv->jobs_queued > cfg->maxQueuedJobs) {
goto error;
}
while (!nested && !qemuDomainNestedJobAllowed(priv, job)) {
VIR_DEBUG("Waiting for async job (vm=%p name=%s)", obj, obj->def->name);
if (virCondWaitUntil(&priv->job.asyncCond, &obj->parent.lock, then) < 0)
goto error;
}
while (priv->job.active) {
VIR_DEBUG("Waiting for job (vm=%p name=%s)", obj, obj->def->name);
if (virCondWaitUntil(&priv->job.cond, &obj->parent.lock, then) < 0)
goto error;
}
/* No job is active but a new async job could have been started while obj
* was unlocked, so we need to recheck it. */
if (!nested && !qemuDomainNestedJobAllowed(priv, job))
goto retry;
qemuDomainObjResetJob(priv);
ignore_value(virTimeMillisNow(&now));
if (job != QEMU_JOB_ASYNC) {
VIR_DEBUG("Started job: %s (async=%s vm=%p name=%s)",
qemuDomainJobTypeToString(job),
qemuDomainAsyncJobTypeToString(priv->job.asyncJob),
obj, obj->def->name);
priv->job.active = job;
priv->job.owner = virThreadSelfID();
priv->job.ownerAPI = virThreadJobGet();
priv->job.started = now;
} else {
VIR_DEBUG("Started async job: %s (vm=%p name=%s)",
qemuDomainAsyncJobTypeToString(asyncJob),
obj, obj->def->name);
qemuDomainObjResetAsyncJob(priv);
if (VIR_ALLOC(priv->job.current) < 0)
goto cleanup;
priv->job.asyncJob = asyncJob;
priv->job.asyncOwner = virThreadSelfID();
priv->job.asyncOwnerAPI = virThreadJobGet();
priv->job.asyncStarted = now;
priv->job.current->started = now;
}
if (qemuDomainTrackJob(job))
qemuDomainObjSaveJob(driver, obj);
virObjectUnref(cfg);
return 0;
error:
ignore_value(virTimeMillisNow(&now));
if (priv->job.active && priv->job.started)
duration = now - priv->job.started;
if (priv->job.asyncJob && priv->job.asyncStarted)
asyncDuration = now - priv->job.asyncStarted;
VIR_WARN("Cannot start job (%s, %s) for domain %s; "
"current job is (%s, %s) owned by (%llu %s, %llu %s) "
"for (%llus, %llus)",
qemuDomainJobTypeToString(job),
qemuDomainAsyncJobTypeToString(asyncJob),
obj->def->name,
qemuDomainJobTypeToString(priv->job.active),
qemuDomainAsyncJobTypeToString(priv->job.asyncJob),
priv->job.owner, NULLSTR(priv->job.ownerAPI),
priv->job.asyncOwner, NULLSTR(priv->job.asyncOwnerAPI),
duration / 1000, asyncDuration / 1000);
if (nested || qemuDomainNestedJobAllowed(priv, job))
blocker = priv->job.ownerAPI;
else
blocker = priv->job.asyncOwnerAPI;
ret = -1;
if (errno == ETIMEDOUT) {
if (blocker) {
virReportError(VIR_ERR_OPERATION_TIMEOUT,
_("cannot acquire state change lock (held by %s)"),
blocker);
} else {
virReportError(VIR_ERR_OPERATION_TIMEOUT, "%s",
_("cannot acquire state change lock"));
}
ret = -2;
} else if (cfg->maxQueuedJobs &&
priv->jobs_queued > cfg->maxQueuedJobs) {
if (blocker) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("cannot acquire state change lock (held by %s) "
"due to max_queued limit"),
blocker);
} else {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("cannot acquire state change lock "
"due to max_queued limit"));
}
ret = -2;
} else {
virReportSystemError(errno, "%s", _("cannot acquire job mutex"));
}
cleanup:
priv->jobs_queued--;
virObjectUnref(cfg);
return ret;
}
/*
* obj must be locked before calling
*
* This must be called by anything that will change the VM state
* in any way, or anything that will use the QEMU monitor.
*
* Successful calls must be followed by EndJob eventually
*/
int qemuDomainObjBeginJob(virQEMUDriverPtr driver,
virDomainObjPtr obj,
qemuDomainJob job)
{
if (qemuDomainObjBeginJobInternal(driver, obj, job,
QEMU_ASYNC_JOB_NONE) < 0)
return -1;
else
return 0;
}
int qemuDomainObjBeginAsyncJob(virQEMUDriverPtr driver,
virDomainObjPtr obj,
qemuDomainAsyncJob asyncJob)
{
if (qemuDomainObjBeginJobInternal(driver, obj, QEMU_JOB_ASYNC,
asyncJob) < 0)
return -1;
else
return 0;
}
int
qemuDomainObjBeginNestedJob(virQEMUDriverPtr driver,
virDomainObjPtr obj,
qemuDomainAsyncJob asyncJob)
{
qemuDomainObjPrivatePtr priv = obj->privateData;
if (asyncJob != priv->job.asyncJob) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unexpected async job %d"), asyncJob);
return -1;
}
if (priv->job.asyncOwner != virThreadSelfID()) {
VIR_WARN("This thread doesn't seem to be the async job owner: %llu",
priv->job.asyncOwner);
}
return qemuDomainObjBeginJobInternal(driver, obj,
QEMU_JOB_ASYNC_NESTED,
QEMU_ASYNC_JOB_NONE);
}
/*
* obj must be locked and have a reference before calling
*
* To be called after completing the work associated with the
* earlier qemuDomainBeginJob() call
*/
void
qemuDomainObjEndJob(virQEMUDriverPtr driver, virDomainObjPtr obj)
{
qemuDomainObjPrivatePtr priv = obj->privateData;
qemuDomainJob job = priv->job.active;
priv->jobs_queued--;
VIR_DEBUG("Stopping job: %s (async=%s vm=%p name=%s)",
qemuDomainJobTypeToString(job),
qemuDomainAsyncJobTypeToString(priv->job.asyncJob),
obj, obj->def->name);
qemuDomainObjResetJob(priv);
if (qemuDomainTrackJob(job))
qemuDomainObjSaveJob(driver, obj);
virCondSignal(&priv->job.cond);
}
void
qemuDomainObjEndAsyncJob(virQEMUDriverPtr driver, virDomainObjPtr obj)
{
qemuDomainObjPrivatePtr priv = obj->privateData;
priv->jobs_queued--;
VIR_DEBUG("Stopping async job: %s (vm=%p name=%s)",
qemuDomainAsyncJobTypeToString(priv->job.asyncJob),
obj, obj->def->name);
qemuDomainObjResetAsyncJob(priv);
qemuDomainObjSaveJob(driver, obj);
virCondBroadcast(&priv->job.asyncCond);
}
void
qemuDomainObjAbortAsyncJob(virDomainObjPtr obj)
{
qemuDomainObjPrivatePtr priv = obj->privateData;
VIR_DEBUG("Requesting abort of async job: %s (vm=%p name=%s)",
qemuDomainAsyncJobTypeToString(priv->job.asyncJob),
obj, obj->def->name);
priv->job.abortJob = true;
virDomainObjBroadcast(obj);
}
/*
* obj must be locked before calling
*
* To be called immediately before any QEMU monitor API call
* Must have already either called qemuDomainObjBeginJob() and checked
* that the VM is still active; may not be used for nested async jobs.
*
* To be followed with qemuDomainObjExitMonitor() once complete
*/
static int
qemuDomainObjEnterMonitorInternal(virQEMUDriverPtr driver,
virDomainObjPtr obj,
qemuDomainAsyncJob asyncJob)
{
qemuDomainObjPrivatePtr priv = obj->privateData;
if (asyncJob != QEMU_ASYNC_JOB_NONE) {
int ret;
if ((ret = qemuDomainObjBeginNestedJob(driver, obj, asyncJob)) < 0)
return ret;
if (!virDomainObjIsActive(obj)) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("domain is no longer running"));
qemuDomainObjEndJob(driver, obj);
return -1;
}
} else if (priv->job.asyncOwner == virThreadSelfID()) {
VIR_WARN("This thread seems to be the async job owner; entering"
" monitor without asking for a nested job is dangerous");
}
VIR_DEBUG("Entering monitor (mon=%p vm=%p name=%s)",
priv->mon, obj, obj->def->name);
virObjectLock(priv->mon);
virObjectRef(priv->mon);
ignore_value(virTimeMillisNow(&priv->monStart));
virObjectUnlock(obj);
return 0;
}
static void ATTRIBUTE_NONNULL(1)
qemuDomainObjExitMonitorInternal(virQEMUDriverPtr driver,
virDomainObjPtr obj)
{
qemuDomainObjPrivatePtr priv = obj->privateData;
bool hasRefs;
hasRefs = virObjectUnref(priv->mon);
if (hasRefs)
virObjectUnlock(priv->mon);
virObjectLock(obj);
VIR_DEBUG("Exited monitor (mon=%p vm=%p name=%s)",
priv->mon, obj, obj->def->name);
priv->monStart = 0;
if (!hasRefs)
priv->mon = NULL;
if (priv->job.active == QEMU_JOB_ASYNC_NESTED)
qemuDomainObjEndJob(driver, obj);
}
void qemuDomainObjEnterMonitor(virQEMUDriverPtr driver,
virDomainObjPtr obj)
{
ignore_value(qemuDomainObjEnterMonitorInternal(driver, obj,
QEMU_ASYNC_JOB_NONE));
}
/* obj must NOT be locked before calling
*
* Should be paired with an earlier qemuDomainObjEnterMonitor() call
*
* Returns -1 if the domain is no longer alive after exiting the monitor.
* In that case, the caller should be careful when using obj's data,
* e.g. the live definition in vm->def has been freed by qemuProcessStop
* and replaced by the persistent definition, so pointers stolen
* from the live definition could no longer be valid.
*/
int qemuDomainObjExitMonitor(virQEMUDriverPtr driver,
virDomainObjPtr obj)
{
qemuDomainObjExitMonitorInternal(driver, obj);
if (!virDomainObjIsActive(obj)) {
if (!virGetLastError())
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("domain is no longer running"));
return -1;
}
return 0;
}
/*
* obj must be locked before calling
*
* To be called immediately before any QEMU monitor API call.
* Must have already either called qemuDomainObjBeginJob()
* and checked that the VM is still active, with asyncJob of
* QEMU_ASYNC_JOB_NONE; or already called qemuDomainObjBeginAsyncJob,
* with the same asyncJob.
*
* Returns 0 if job was started, in which case this must be followed with
* qemuDomainObjExitMonitor(); -2 if waiting for the nested job times out;
* or -1 if the job could not be started (probably because the vm exited
* in the meantime).
*/
int
qemuDomainObjEnterMonitorAsync(virQEMUDriverPtr driver,
virDomainObjPtr obj,
qemuDomainAsyncJob asyncJob)
{
return qemuDomainObjEnterMonitorInternal(driver, obj, asyncJob);
}
/**
* qemuDomainGetAgent:
* @vm: domain object
*
* Returns the agent pointer of @vm;
*/
qemuAgentPtr
qemuDomainGetAgent(virDomainObjPtr vm)
{
return (((qemuDomainObjPrivatePtr)(vm->privateData))->agent);
}
/*
* obj must be locked before calling
*
* To be called immediately before any QEMU agent API call.
* Must have already called qemuDomainObjBeginJob() and checked
* that the VM is still active.
*
* To be followed with qemuDomainObjExitAgent() once complete
*/
void
qemuDomainObjEnterAgent(virDomainObjPtr obj)
{
qemuDomainObjPrivatePtr priv = obj->privateData;
VIR_DEBUG("Entering agent (agent=%p vm=%p name=%s)",
priv->agent, obj, obj->def->name);
virObjectLock(priv->agent);
virObjectRef(priv->agent);
ignore_value(virTimeMillisNow(&priv->agentStart));
virObjectUnlock(obj);
}
/* obj must NOT be locked before calling
*
* Should be paired with an earlier qemuDomainObjEnterAgent() call
*/
void
qemuDomainObjExitAgent(virDomainObjPtr obj)
{
qemuDomainObjPrivatePtr priv = obj->privateData;
bool hasRefs;
hasRefs = virObjectUnref(priv->agent);
if (hasRefs)
virObjectUnlock(priv->agent);
virObjectLock(obj);
VIR_DEBUG("Exited agent (agent=%p vm=%p name=%s)",
priv->agent, obj, obj->def->name);
priv->agentStart = 0;
if (!hasRefs)
priv->agent = NULL;
}
void qemuDomainObjEnterRemote(virDomainObjPtr obj)
{
VIR_DEBUG("Entering remote (vm=%p name=%s)",
obj, obj->def->name);
virObjectUnlock(obj);
}
void qemuDomainObjExitRemote(virDomainObjPtr obj)
{
virObjectLock(obj);
VIR_DEBUG("Exited remote (vm=%p name=%s)",
obj, obj->def->name);
}
virDomainDefPtr
qemuDomainDefCopy(virQEMUDriverPtr driver,
virDomainDefPtr src,
unsigned int flags)
{
virBuffer buf = VIR_BUFFER_INITIALIZER;
virDomainDefPtr ret = NULL;
virCapsPtr caps = NULL;
char *xml = NULL;
if (qemuDomainDefFormatBuf(driver, src, flags, &buf) < 0)
goto cleanup;
xml = virBufferContentAndReset(&buf);
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
if (!(ret = virDomainDefParseString(xml, caps, driver->xmlopt,
VIR_DOMAIN_DEF_PARSE_INACTIVE |
VIR_DOMAIN_DEF_PARSE_SKIP_VALIDATE)))
goto cleanup;
cleanup:
VIR_FREE(xml);
virObjectUnref(caps);
return ret;
}
int
qemuDomainDefFormatBuf(virQEMUDriverPtr driver,
virDomainDefPtr def,
unsigned int flags,
virBuffer *buf)
{
int ret = -1;
virCPUDefPtr cpu = NULL;
virCPUDefPtr def_cpu = def->cpu;
virDomainControllerDefPtr *controllers = NULL;
int ncontrollers = 0;
virCapsPtr caps = NULL;
if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
goto cleanup;
/* Update guest CPU requirements according to host CPU */
if ((flags & VIR_DOMAIN_XML_UPDATE_CPU) &&
def_cpu &&
(def_cpu->mode != VIR_CPU_MODE_CUSTOM || def_cpu->model)) {
if (!caps->host.cpu ||
!caps->host.cpu->model) {
virReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("cannot get host CPU capabilities"));
goto cleanup;
}
if (!(cpu = virCPUDefCopy(def_cpu)) ||
cpuUpdate(cpu, caps->host.cpu) < 0)
goto cleanup;
def->cpu = cpu;
}
if ((flags & VIR_DOMAIN_XML_MIGRATABLE)) {
size_t i;
int toremove = 0;
virDomainControllerDefPtr usb = NULL, pci = NULL;
/* If only the default USB controller is present, we can remove it
* and make the XML compatible with older versions of libvirt which
* didn't support USB controllers in the XML but always added the
* default one to qemu anyway.
*/
for (i = 0; i < def->ncontrollers; i++) {
if (def->controllers[i]->type == VIR_DOMAIN_CONTROLLER_TYPE_USB) {
if (usb) {
usb = NULL;
break;
}
usb = def->controllers[i];
}
}
/* The original purpose of the check was the migration compatibility
* with libvirt <= 0.9.4. Limitation doesn't apply to other archs
* and can cause problems on PPC64.
*/
if (ARCH_IS_X86(def->os.arch) && qemuDomainMachineIsI440FX(def) &&
usb && usb->idx == 0 && usb->model == -1) {
VIR_DEBUG("Removing default USB controller from domain '%s'"
" for migration compatibility", def->name);
toremove++;
} else {
usb = NULL;
}
/* Remove the default PCI controller if there is only one present
* and its model is pci-root */
for (i = 0; i < def->ncontrollers; i++) {
if (def->controllers[i]->type == VIR_DOMAIN_CONTROLLER_TYPE_PCI) {
if (pci) {
pci = NULL;
break;
}
pci = def->controllers[i];
}
}
if (pci && pci->idx == 0 &&
pci->model == VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT) {
VIR_DEBUG("Removing default pci-root from domain '%s'"
" for migration compatibility", def->name);
toremove++;
} else {
pci = NULL;
}
if (toremove) {
controllers = def->controllers;
ncontrollers = def->ncontrollers;
if (VIR_ALLOC_N(def->controllers, ncontrollers - toremove) < 0) {
controllers = NULL;
goto cleanup;
}
def->ncontrollers = 0;
for (i = 0; i < ncontrollers; i++) {
if (controllers[i] != usb && controllers[i] != pci)
def->controllers[def->ncontrollers++] = controllers[i];
}
}
}
ret = virDomainDefFormatInternal(def, driver->caps,
virDomainDefFormatConvertXMLFlags(flags),
buf);
cleanup:
def->cpu = def_cpu;
virCPUDefFree(cpu);
if (controllers) {
VIR_FREE(def->controllers);
def->controllers = controllers;
def->ncontrollers = ncontrollers;
}
virObjectUnref(caps);
return ret;
}
char *qemuDomainDefFormatXML(virQEMUDriverPtr driver,
virDomainDefPtr def,
unsigned int flags)
{
virBuffer buf = VIR_BUFFER_INITIALIZER;
if (qemuDomainDefFormatBuf(driver, def, flags, &buf) < 0) {
virBufferFreeAndReset(&buf);
return NULL;
}
if (virBufferError(&buf)) {
virReportOOMError();
virBufferFreeAndReset(&buf);
return NULL;
}
return virBufferContentAndReset(&buf);
}
char *qemuDomainFormatXML(virQEMUDriverPtr driver,
virDomainObjPtr vm,
unsigned int flags)
{
virDomainDefPtr def;
if ((flags & VIR_DOMAIN_XML_INACTIVE) && vm->newDef)
def = vm->newDef;
else
def = vm->def;
return qemuDomainDefFormatXML(driver, def, flags);
}
char *
qemuDomainDefFormatLive(virQEMUDriverPtr driver,
virDomainDefPtr def,
bool inactive,
bool compatible)
{
unsigned int flags = QEMU_DOMAIN_FORMAT_LIVE_FLAGS;
if (inactive)
flags |= VIR_DOMAIN_XML_INACTIVE;
if (compatible)
flags |= VIR_DOMAIN_XML_MIGRATABLE;
return qemuDomainDefFormatXML(driver, def, flags);
}
void qemuDomainObjTaint(virQEMUDriverPtr driver,
virDomainObjPtr obj,
virDomainTaintFlags taint,
qemuDomainLogContextPtr logCtxt)
{
virErrorPtr orig_err = NULL;
bool closeLog = false;
if (virDomainObjTaint(obj, taint)) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(obj->def->uuid, uuidstr);
VIR_WARN("Domain id=%d name='%s' uuid=%s is tainted: %s",
obj->def->id,
obj->def->name,
uuidstr,
virDomainTaintTypeToString(taint));
/* We don't care about errors logging taint info, so
* preserve original error, and clear any error that
* is raised */
orig_err = virSaveLastError();
if (logCtxt == NULL) {
logCtxt = qemuDomainLogContextNew(driver, obj,
QEMU_DOMAIN_LOG_CONTEXT_MODE_ATTACH);
if (!logCtxt) {
if (orig_err) {
virSetError(orig_err);
virFreeError(orig_err);
}
VIR_WARN("Unable to open domainlog");
return;
}
closeLog = true;
}
if (qemuDomainLogContextWrite(logCtxt,
"Domain id=%d is tainted: %s\n",
obj->def->id,
virDomainTaintTypeToString(taint)) < 0)
virResetLastError();
if (closeLog)
qemuDomainLogContextFree(logCtxt);
if (orig_err) {
virSetError(orig_err);
virFreeError(orig_err);
}
}
}
void qemuDomainObjCheckTaint(virQEMUDriverPtr driver,
virDomainObjPtr obj,
qemuDomainLogContextPtr logCtxt)
{
size_t i;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
qemuDomainObjPrivatePtr priv = obj->privateData;
if (virQEMUDriverIsPrivileged(driver) &&
(!cfg->clearEmulatorCapabilities ||
cfg->user == 0 ||
cfg->group == 0))
qemuDomainObjTaint(driver, obj, VIR_DOMAIN_TAINT_HIGH_PRIVILEGES, logCtxt);
if (priv->hookRun)
qemuDomainObjTaint(driver, obj, VIR_DOMAIN_TAINT_HOOK, logCtxt);
if (obj->def->namespaceData) {
qemuDomainCmdlineDefPtr qemucmd = obj->def->namespaceData;
if (qemucmd->num_args || qemucmd->num_env)
qemuDomainObjTaint(driver, obj, VIR_DOMAIN_TAINT_CUSTOM_ARGV, logCtxt);
}
if (obj->def->cpu && obj->def->cpu->mode == VIR_CPU_MODE_HOST_PASSTHROUGH)
qemuDomainObjTaint(driver, obj, VIR_DOMAIN_TAINT_HOST_CPU, logCtxt);
for (i = 0; i < obj->def->ndisks; i++)
qemuDomainObjCheckDiskTaint(driver, obj, obj->def->disks[i], logCtxt);
for (i = 0; i < obj->def->nhostdevs; i++)
qemuDomainObjCheckHostdevTaint(driver, obj, obj->def->hostdevs[i],
logCtxt);
for (i = 0; i < obj->def->nnets; i++)
qemuDomainObjCheckNetTaint(driver, obj, obj->def->nets[i], logCtxt);
if (obj->def->os.dtb)
qemuDomainObjTaint(driver, obj, VIR_DOMAIN_TAINT_CUSTOM_DTB, logCtxt);
virObjectUnref(cfg);
}
void qemuDomainObjCheckDiskTaint(virQEMUDriverPtr driver,
virDomainObjPtr obj,
virDomainDiskDefPtr disk,
qemuDomainLogContextPtr logCtxt)
{
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
int format = virDomainDiskGetFormat(disk);
if ((!format || format == VIR_STORAGE_FILE_AUTO) &&
cfg->allowDiskFormatProbing)
qemuDomainObjTaint(driver, obj, VIR_DOMAIN_TAINT_DISK_PROBING, logCtxt);
if (disk->rawio == VIR_TRISTATE_BOOL_YES)
qemuDomainObjTaint(driver, obj, VIR_DOMAIN_TAINT_HIGH_PRIVILEGES,
logCtxt);
if (disk->device == VIR_DOMAIN_DISK_DEVICE_CDROM &&
virStorageSourceGetActualType(disk->src) == VIR_STORAGE_TYPE_BLOCK &&
disk->src->path)
qemuDomainObjTaint(driver, obj, VIR_DOMAIN_TAINT_CDROM_PASSTHROUGH,
logCtxt);
virObjectUnref(cfg);
}
void qemuDomainObjCheckHostdevTaint(virQEMUDriverPtr driver,
virDomainObjPtr obj,
virDomainHostdevDefPtr hostdev,
qemuDomainLogContextPtr logCtxt)
{
virDomainHostdevSubsysSCSIPtr scsisrc = &hostdev->source.subsys.u.scsi;
if (hostdev->source.subsys.type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI &&
scsisrc->rawio == VIR_TRISTATE_BOOL_YES)
qemuDomainObjTaint(driver, obj, VIR_DOMAIN_TAINT_HIGH_PRIVILEGES,
logCtxt);
}
void qemuDomainObjCheckNetTaint(virQEMUDriverPtr driver,
virDomainObjPtr obj,
virDomainNetDefPtr net,
qemuDomainLogContextPtr logCtxt)
{
/* script is only useful for NET_TYPE_ETHERNET (qemu) and
* NET_TYPE_BRIDGE (xen), but could be (incorrectly) specified for
* any interface type. In any case, it's adding user sauce into
* the soup, so it should taint the domain.
*/
if (net->script != NULL)
qemuDomainObjTaint(driver, obj, VIR_DOMAIN_TAINT_SHELL_SCRIPTS, logCtxt);
}
qemuDomainLogContextPtr qemuDomainLogContextNew(virQEMUDriverPtr driver,
virDomainObjPtr vm,
qemuDomainLogContextMode mode)
{
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
qemuDomainLogContextPtr ctxt = NULL;
if (VIR_ALLOC(ctxt) < 0)
goto error;
VIR_DEBUG("Context new %p stdioLogD=%d", ctxt, cfg->stdioLogD);
ctxt->writefd = -1;
ctxt->readfd = -1;
virAtomicIntSet(&ctxt->refs, 1);
if (virAsprintf(&ctxt->path, "%s/%s.log", cfg->logDir, vm->def->name) < 0)
goto error;
if (cfg->stdioLogD) {
ctxt->manager = virLogManagerNew(virQEMUDriverIsPrivileged(driver));
if (!ctxt->manager)
goto error;
ctxt->writefd = virLogManagerDomainOpenLogFile(ctxt->manager,
"qemu",
vm->def->uuid,
vm->def->name,
ctxt->path,
0,
&ctxt->inode,
&ctxt->pos);
if (ctxt->writefd < 0)
goto error;
} else {
if ((ctxt->writefd = open(ctxt->path, O_WRONLY | O_CREAT | O_APPEND, S_IRUSR | S_IWUSR)) < 0) {
virReportSystemError(errno, _("failed to create logfile %s"),
ctxt->path);
goto error;
}
if (virSetCloseExec(ctxt->writefd) < 0) {
virReportSystemError(errno, _("failed to set close-on-exec flag on %s"),
ctxt->path);
goto error;
}
/* For unprivileged startup we must truncate the file since
* we can't rely on logrotate. We don't use O_TRUNC since
* it is better for SELinux policy if we truncate afterwards */
if (mode == QEMU_DOMAIN_LOG_CONTEXT_MODE_START &&
!virQEMUDriverIsPrivileged(driver) &&
ftruncate(ctxt->writefd, 0) < 0) {
virReportSystemError(errno, _("failed to truncate %s"),
ctxt->path);
goto error;
}
if (mode == QEMU_DOMAIN_LOG_CONTEXT_MODE_START) {
if ((ctxt->readfd = open(ctxt->path, O_RDONLY, S_IRUSR | S_IWUSR)) < 0) {
virReportSystemError(errno, _("failed to open logfile %s"),
ctxt->path);
goto error;
}
if (virSetCloseExec(ctxt->readfd) < 0) {
virReportSystemError(errno, _("failed to set close-on-exec flag on %s"),
ctxt->path);
goto error;
}
}
if ((ctxt->pos = lseek(ctxt->writefd, 0, SEEK_END)) < 0) {
virReportSystemError(errno, _("failed to seek in log file %s"),
ctxt->path);
goto error;
}
}
cleanup:
virObjectUnref(cfg);
return ctxt;
error:
qemuDomainLogContextFree(ctxt);
ctxt = NULL;
goto cleanup;
}
int qemuDomainLogContextWrite(qemuDomainLogContextPtr ctxt,
const char *fmt, ...)
{
va_list argptr;
char *message = NULL;
int ret = -1;
va_start(argptr, fmt);
if (virVasprintf(&message, fmt, argptr) < 0)
goto cleanup;
if (!ctxt->manager &&
lseek(ctxt->writefd, 0, SEEK_END) < 0) {
virReportSystemError(errno, "%s",
_("Unable to seek to end of domain logfile"));
goto cleanup;
}
if (safewrite(ctxt->writefd, message, strlen(message)) < 0) {
virReportSystemError(errno, "%s",
_("Unable to write to domain logfile"));
goto cleanup;
}
ret = 0;
cleanup:
va_end(argptr);
VIR_FREE(message);
return ret;
}
ssize_t qemuDomainLogContextRead(qemuDomainLogContextPtr ctxt,
char **msg)
{
VIR_DEBUG("Context read %p manager=%p inode=%llu pos=%llu",
ctxt, ctxt->manager,
(unsigned long long)ctxt->inode,
(unsigned long long)ctxt->pos);
char *buf;
size_t buflen;
if (ctxt->manager) {
buf = virLogManagerDomainReadLogFile(ctxt->manager,
ctxt->path,
ctxt->inode,
ctxt->pos,
1024 * 128,
0);
if (!buf)
return -1;
buflen = strlen(buf);
} else {
ssize_t got;
buflen = 1024 * 128;
/* Best effort jump to start of messages */
ignore_value(lseek(ctxt->readfd, ctxt->pos, SEEK_SET));
if (VIR_ALLOC_N(buf, buflen) < 0)
return -1;
got = saferead(ctxt->readfd, buf, buflen - 1);
if (got < 0) {
VIR_FREE(buf);
virReportSystemError(errno, "%s",
_("Unable to read from log file"));
return -1;
}
buf[got] = '\0';
ignore_value(VIR_REALLOC_N_QUIET(buf, got + 1));
buflen = got;
}
*msg = buf;
return buflen;
}
/**
* qemuDomainLogAppendMessage:
*
* This is a best-effort attempt to add a log message to the qemu log file
* either by using virtlogd or the legacy approach */
int
qemuDomainLogAppendMessage(virQEMUDriverPtr driver,
virDomainObjPtr vm,
const char *fmt,
...)
{
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
virLogManagerPtr manager = NULL;
va_list ap;
char *path = NULL;
int writefd = -1;
char *message = NULL;
int ret = -1;
va_start(ap, fmt);
if (virVasprintf(&message, fmt, ap) < 0)
goto cleanup;
VIR_DEBUG("Append log message (vm='%s' message='%s) stdioLogD=%d",
vm->def->name, message, cfg->stdioLogD);
if (virAsprintf(&path, "%s/%s.log", cfg->logDir, vm->def->name) < 0)
goto cleanup;
if (cfg->stdioLogD) {
if (!(manager = virLogManagerNew(virQEMUDriverIsPrivileged(driver))))
goto cleanup;
if (virLogManagerDomainAppendMessage(manager, "qemu", vm->def->uuid,
vm->def->name, path, message, 0) < 0)
goto cleanup;
} else {
if ((writefd = open(path, O_WRONLY | O_CREAT | O_APPEND, S_IRUSR | S_IWUSR)) < 0) {
virReportSystemError(errno, _("failed to create logfile %s"),
path);
goto cleanup;
}
if (safewrite(writefd, message, strlen(message)) < 0)
goto cleanup;
}
ret = 0;
cleanup:
va_end(ap);
VIR_FREE(message);
VIR_FORCE_CLOSE(writefd);
virLogManagerFree(manager);
virObjectUnref(cfg);
VIR_FREE(path);
return ret;
}
int qemuDomainLogContextGetWriteFD(qemuDomainLogContextPtr ctxt)
{
return ctxt->writefd;
}
void qemuDomainLogContextMarkPosition(qemuDomainLogContextPtr ctxt)
{
if (ctxt->manager)
virLogManagerDomainGetLogFilePosition(ctxt->manager,
ctxt->path,
0,
&ctxt->inode,
&ctxt->pos);
else
ctxt->pos = lseek(ctxt->writefd, 0, SEEK_END);
}
void qemuDomainLogContextRef(qemuDomainLogContextPtr ctxt)
{
VIR_DEBUG("Context ref %p", ctxt);
virAtomicIntInc(&ctxt->refs);
}
virLogManagerPtr qemuDomainLogContextGetManager(qemuDomainLogContextPtr ctxt)
{
return ctxt->manager;
}
void qemuDomainLogContextFree(qemuDomainLogContextPtr ctxt)
{
bool lastRef;
if (!ctxt)
return;
lastRef = virAtomicIntDecAndTest(&ctxt->refs);
VIR_DEBUG("Context free %p lastref=%d", ctxt, lastRef);
if (!lastRef)
return;
virLogManagerFree(ctxt->manager);
VIR_FREE(ctxt->path);
VIR_FORCE_CLOSE(ctxt->writefd);
VIR_FORCE_CLOSE(ctxt->readfd);
VIR_FREE(ctxt);
}
/* Locate an appropriate 'qemu-img' binary. */
const char *
qemuFindQemuImgBinary(virQEMUDriverPtr driver)
{
if (!driver->qemuImgBinary)
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("unable to find qemu-img"));
return driver->qemuImgBinary;
}
int
qemuDomainSnapshotWriteMetadata(virDomainObjPtr vm,
virDomainSnapshotObjPtr snapshot,
virCapsPtr caps,
char *snapshotDir)
{
char *newxml = NULL;
int ret = -1;
char *snapDir = NULL;
char *snapFile = NULL;
char uuidstr[VIR_UUID_STRING_BUFLEN];
virUUIDFormat(vm->def->uuid, uuidstr);
newxml = virDomainSnapshotDefFormat(
uuidstr, snapshot->def, caps,
virDomainDefFormatConvertXMLFlags(QEMU_DOMAIN_FORMAT_LIVE_FLAGS),
1);
if (newxml == NULL)
return -1;
if (virAsprintf(&snapDir, "%s/%s", snapshotDir, vm->def->name) < 0)
goto cleanup;
if (virFileMakePath(snapDir) < 0) {
virReportSystemError(errno, _("cannot create snapshot directory '%s'"),
snapDir);
goto cleanup;
}
if (virAsprintf(&snapFile, "%s/%s.xml", snapDir, snapshot->def->name) < 0)
goto cleanup;
ret = virXMLSaveFile(snapFile, NULL, "snapshot-edit", newxml);
cleanup:
VIR_FREE(snapFile);
VIR_FREE(snapDir);
VIR_FREE(newxml);
return ret;
}
/* The domain is expected to be locked and inactive. Return -1 on normal
* failure, 1 if we skipped a disk due to try_all. */
static int
qemuDomainSnapshotForEachQcow2Raw(virQEMUDriverPtr driver,
virDomainDefPtr def,
const char *name,
const char *op,
bool try_all,
int ndisks)
{
const char *qemuimgarg[] = { NULL, "snapshot", NULL, NULL, NULL, NULL };
size_t i;
bool skipped = false;
qemuimgarg[0] = qemuFindQemuImgBinary(driver);
if (qemuimgarg[0] == NULL) {
/* qemuFindQemuImgBinary set the error */
return -1;
}
qemuimgarg[2] = op;
qemuimgarg[3] = name;
for (i = 0; i < ndisks; i++) {
/* FIXME: we also need to handle LVM here */
if (def->disks[i]->device == VIR_DOMAIN_DISK_DEVICE_DISK) {
int format = virDomainDiskGetFormat(def->disks[i]);
if (format > 0 && format != VIR_STORAGE_FILE_QCOW2) {
if (try_all) {
/* Continue on even in the face of error, since other
* disks in this VM may have the same snapshot name.
*/
VIR_WARN("skipping snapshot action on %s",
def->disks[i]->dst);
skipped = true;
continue;
} else if (STREQ(op, "-c") && i) {
/* We must roll back partial creation by deleting
* all earlier snapshots. */
qemuDomainSnapshotForEachQcow2Raw(driver, def, name,
"-d", false, i);
}
virReportError(VIR_ERR_OPERATION_INVALID,
_("Disk device '%s' does not support"
" snapshotting"),
def->disks[i]->dst);
return -1;
}
qemuimgarg[4] = virDomainDiskGetSource(def->disks[i]);
if (virRun(qemuimgarg, NULL) < 0) {
if (try_all) {
VIR_WARN("skipping snapshot action on %s",
def->disks[i]->dst);
skipped = true;
continue;
} else if (STREQ(op, "-c") && i) {
/* We must roll back partial creation by deleting
* all earlier snapshots. */
qemuDomainSnapshotForEachQcow2Raw(driver, def, name,
"-d", false, i);
}
return -1;
}
}
}
return skipped ? 1 : 0;
}
/* The domain is expected to be locked and inactive. Return -1 on normal
* failure, 1 if we skipped a disk due to try_all. */
int
qemuDomainSnapshotForEachQcow2(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainSnapshotObjPtr snap,
const char *op,
bool try_all)
{
/* Prefer action on the disks in use at the time the snapshot was
* created; but fall back to current definition if dealing with a
* snapshot created prior to libvirt 0.9.5. */
virDomainDefPtr def = snap->def->dom;
if (!def)
def = vm->def;
return qemuDomainSnapshotForEachQcow2Raw(driver, def, snap->def->name,
op, try_all, def->ndisks);
}
/* Discard one snapshot (or its metadata), without reparenting any children. */
int
qemuDomainSnapshotDiscard(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainSnapshotObjPtr snap,
bool update_current,
bool metadata_only)
{
char *snapFile = NULL;
int ret = -1;
qemuDomainObjPrivatePtr priv;
virDomainSnapshotObjPtr parentsnap = NULL;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
if (!metadata_only) {
if (!virDomainObjIsActive(vm)) {
/* Ignore any skipped disks */
if (qemuDomainSnapshotForEachQcow2(driver, vm, snap, "-d",
true) < 0)
goto cleanup;
} else {
priv = vm->privateData;
qemuDomainObjEnterMonitor(driver, vm);
/* we continue on even in the face of error */
qemuMonitorDeleteSnapshot(priv->mon, snap->def->name);
ignore_value(qemuDomainObjExitMonitor(driver, vm));
}
}
if (virAsprintf(&snapFile, "%s/%s/%s.xml", cfg->snapshotDir,
vm->def->name, snap->def->name) < 0)
goto cleanup;
if (snap == vm->current_snapshot) {
if (update_current && snap->def->parent) {
parentsnap = virDomainSnapshotFindByName(vm->snapshots,
snap->def->parent);
if (!parentsnap) {
VIR_WARN("missing parent snapshot matching name '%s'",
snap->def->parent);
} else {
parentsnap->def->current = true;
if (qemuDomainSnapshotWriteMetadata(vm, parentsnap, driver->caps,
cfg->snapshotDir) < 0) {
VIR_WARN("failed to set parent snapshot '%s' as current",
snap->def->parent);
parentsnap->def->current = false;
parentsnap = NULL;
}
}
}
vm->current_snapshot = parentsnap;
}
if (unlink(snapFile) < 0)
VIR_WARN("Failed to unlink %s", snapFile);
virDomainSnapshotObjListRemove(vm->snapshots, snap);
ret = 0;
cleanup:
VIR_FREE(snapFile);
virObjectUnref(cfg);
return ret;
}
/* Hash iterator callback to discard multiple snapshots. */
int qemuDomainSnapshotDiscardAll(void *payload,
const void *name ATTRIBUTE_UNUSED,
void *data)
{
virDomainSnapshotObjPtr snap = payload;
virQEMUSnapRemovePtr curr = data;
int err;
if (snap->def->current)
curr->current = true;
err = qemuDomainSnapshotDiscard(curr->driver, curr->vm, snap, false,
curr->metadata_only);
if (err && !curr->err)
curr->err = err;
return 0;
}
int
qemuDomainSnapshotDiscardAllMetadata(virQEMUDriverPtr driver,
virDomainObjPtr vm)
{
virQEMUSnapRemove rem;
rem.driver = driver;
rem.vm = vm;
rem.metadata_only = true;
rem.err = 0;
virDomainSnapshotForEach(vm->snapshots, qemuDomainSnapshotDiscardAll,
&rem);
return rem.err;
}
/*
* The caller must hold a lock the vm.
*/
void
qemuDomainRemoveInactive(virQEMUDriverPtr driver,
virDomainObjPtr vm)
{
bool haveJob = true;
char *snapDir;
virQEMUDriverConfigPtr cfg;
if (vm->persistent) {
/* Short-circuit, we don't want to remove a persistent domain */
return;
}
cfg = virQEMUDriverGetConfig(driver);
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
haveJob = false;
/* Remove any snapshot metadata prior to removing the domain */
if (qemuDomainSnapshotDiscardAllMetadata(driver, vm) < 0) {
VIR_WARN("unable to remove all snapshots for domain %s",
vm->def->name);
}
else if (virAsprintf(&snapDir, "%s/%s", cfg->snapshotDir,
vm->def->name) < 0) {
VIR_WARN("unable to remove snapshot directory %s/%s",
cfg->snapshotDir, vm->def->name);
} else {
if (rmdir(snapDir) < 0 && errno != ENOENT)
VIR_WARN("unable to remove snapshot directory %s", snapDir);
VIR_FREE(snapDir);
}
virObjectRef(vm);
virDomainObjListRemove(driver->domains, vm);
/*
* virDomainObjListRemove() leaves the domain unlocked so it can
* be unref'd for other drivers that depend on that, but we still
* need to reset a job and we have a reference from the API that
* called this function. So we need to lock it back. This is
* just a workaround for the qemu driver.
*
* XXX: Ideally, the global handling of domain objects and object
* lists would be refactored so we don't need hacks like
* this, but since that requires refactor of all drivers,
* it's a work for another day.
*/
virObjectLock(vm);
virObjectUnref(cfg);
if (haveJob)
qemuDomainObjEndJob(driver, vm);
virObjectUnref(vm);
}
void
qemuDomainSetFakeReboot(virQEMUDriverPtr driver,
virDomainObjPtr vm,
bool value)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
if (priv->fakeReboot == value)
goto cleanup;
priv->fakeReboot = value;
if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0)
VIR_WARN("Failed to save status on vm %s", vm->def->name);
cleanup:
virObjectUnref(cfg);
}
static void
qemuDomainCheckRemoveOptionalDisk(virQEMUDriverPtr driver,
virDomainObjPtr vm,
size_t diskIndex)
{
char uuid[VIR_UUID_STRING_BUFLEN];
virObjectEventPtr event = NULL;
virDomainDiskDefPtr disk = vm->def->disks[diskIndex];
const char *src = virDomainDiskGetSource(disk);
virUUIDFormat(vm->def->uuid, uuid);
VIR_DEBUG("Dropping disk '%s' on domain '%s' (UUID '%s') "
"due to inaccessible source '%s'",
disk->dst, vm->def->name, uuid, src);
if (disk->device == VIR_DOMAIN_DISK_DEVICE_CDROM ||
disk->device == VIR_DOMAIN_DISK_DEVICE_FLOPPY) {
event = virDomainEventDiskChangeNewFromObj(vm, src, NULL,
disk->info.alias,
VIR_DOMAIN_EVENT_DISK_CHANGE_MISSING_ON_START);
ignore_value(virDomainDiskSetSource(disk, NULL));
} else {
event = virDomainEventDiskChangeNewFromObj(vm, src, NULL,
disk->info.alias,
VIR_DOMAIN_EVENT_DISK_DROP_MISSING_ON_START);
virDomainDiskRemove(vm->def, diskIndex);
virDomainDiskDefFree(disk);
}
qemuDomainEventQueue(driver, event);
}
static int
qemuDomainCheckDiskStartupPolicy(virQEMUDriverPtr driver,
virDomainObjPtr vm,
size_t diskIndex,
bool cold_boot)
{
int startupPolicy = vm->def->disks[diskIndex]->startupPolicy;
int device = vm->def->disks[diskIndex]->device;
switch ((virDomainStartupPolicy) startupPolicy) {
case VIR_DOMAIN_STARTUP_POLICY_OPTIONAL:
/* Once started with an optional disk, qemu saves its section
* in the migration stream, so later, when restoring from it
* we must make sure the sections match. */
if (!cold_boot &&
device != VIR_DOMAIN_DISK_DEVICE_FLOPPY &&
device != VIR_DOMAIN_DISK_DEVICE_CDROM)
return -1;
break;
case VIR_DOMAIN_STARTUP_POLICY_MANDATORY:
return -1;
case VIR_DOMAIN_STARTUP_POLICY_REQUISITE:
if (cold_boot)
return -1;
break;
case VIR_DOMAIN_STARTUP_POLICY_DEFAULT:
case VIR_DOMAIN_STARTUP_POLICY_LAST:
/* this should never happen */
break;
}
qemuDomainCheckRemoveOptionalDisk(driver, vm, diskIndex);
return 0;
}
int
qemuDomainCheckDiskPresence(virQEMUDriverPtr driver,
virDomainObjPtr vm,
bool cold_boot)
{
int ret = -1;
size_t i;
VIR_DEBUG("Checking for disk presence");
for (i = vm->def->ndisks; i > 0; i--) {
size_t idx = i - 1;
virDomainDiskDefPtr disk = vm->def->disks[idx];
virStorageFileFormat format = virDomainDiskGetFormat(disk);
if (virStorageSourceIsEmpty(disk->src))
continue;
/* There is no need to check the backing chain for disks
* without backing support, the fact that the file exists is
* more than enough */
if (virStorageSourceIsLocalStorage(disk->src) &&
format > VIR_STORAGE_FILE_NONE &&
format < VIR_STORAGE_FILE_BACKING &&
virFileExists(virDomainDiskGetSource(disk)))
continue;
if (qemuDomainDetermineDiskChain(driver, vm, disk, true, true) >= 0)
continue;
if (disk->startupPolicy &&
qemuDomainCheckDiskStartupPolicy(driver, vm, idx,
cold_boot) >= 0) {
virResetLastError();
continue;
}
goto error;
}
ret = 0;
error:
return ret;
}
/*
* The vm must be locked when any of the following cleanup functions is
* called.
*/
int
qemuDomainCleanupAdd(virDomainObjPtr vm,
qemuDomainCleanupCallback cb)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
size_t i;
VIR_DEBUG("vm=%s, cb=%p", vm->def->name, cb);
for (i = 0; i < priv->ncleanupCallbacks; i++) {
if (priv->cleanupCallbacks[i] == cb)
return 0;
}
if (VIR_RESIZE_N(priv->cleanupCallbacks,
priv->ncleanupCallbacks_max,
priv->ncleanupCallbacks, 1) < 0)
return -1;
priv->cleanupCallbacks[priv->ncleanupCallbacks++] = cb;
return 0;
}
void
qemuDomainCleanupRemove(virDomainObjPtr vm,
qemuDomainCleanupCallback cb)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
size_t i;
VIR_DEBUG("vm=%s, cb=%p", vm->def->name, cb);
for (i = 0; i < priv->ncleanupCallbacks; i++) {
if (priv->cleanupCallbacks[i] == cb)
VIR_DELETE_ELEMENT_INPLACE(priv->cleanupCallbacks,
i, priv->ncleanupCallbacks);
}
VIR_SHRINK_N(priv->cleanupCallbacks,
priv->ncleanupCallbacks_max,
priv->ncleanupCallbacks_max - priv->ncleanupCallbacks);
}
void
qemuDomainCleanupRun(virQEMUDriverPtr driver,
virDomainObjPtr vm)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
size_t i;
VIR_DEBUG("driver=%p, vm=%s", driver, vm->def->name);
/* run cleanup callbacks in reverse order */
for (i = 0; i < priv->ncleanupCallbacks; i++) {
if (priv->cleanupCallbacks[priv->ncleanupCallbacks - (i + 1)])
priv->cleanupCallbacks[i](driver, vm);
}
VIR_FREE(priv->cleanupCallbacks);
priv->ncleanupCallbacks = 0;
priv->ncleanupCallbacks_max = 0;
}
static void
qemuDomainGetImageIds(virQEMUDriverConfigPtr cfg,
virDomainObjPtr vm,
virStorageSourcePtr src,
uid_t *uid, gid_t *gid)
{
virSecurityLabelDefPtr vmlabel;
virSecurityDeviceLabelDefPtr disklabel;
if (uid)
*uid = -1;
if (gid)
*gid = -1;
if (cfg) {
if (uid)
*uid = cfg->user;
if (gid)
*gid = cfg->group;
}
if (vm && (vmlabel = virDomainDefGetSecurityLabelDef(vm->def, "dac")) &&
vmlabel->label)
virParseOwnershipIds(vmlabel->label, uid, gid);
if ((disklabel = virStorageSourceGetSecurityLabelDef(src, "dac")) &&
disklabel->label)
virParseOwnershipIds(disklabel->label, uid, gid);
}
int
qemuDomainStorageFileInit(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virStorageSourcePtr src)
{
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
uid_t uid;
gid_t gid;
int ret = -1;
qemuDomainGetImageIds(cfg, vm, src, &uid, &gid);
if (virStorageFileInitAs(src, uid, gid) < 0)
goto cleanup;
ret = 0;
cleanup:
virObjectUnref(cfg);
return ret;
}
char *
qemuDomainStorageAlias(const char *device, int depth)
{
char *alias;
if (STRPREFIX(device, QEMU_DRIVE_HOST_PREFIX))
device += strlen(QEMU_DRIVE_HOST_PREFIX);
if (!depth)
ignore_value(VIR_STRDUP(alias, device));
else
ignore_value(virAsprintf(&alias, "%s.%d", device, depth));
return alias;
}
int
qemuDomainDetermineDiskChain(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainDiskDefPtr disk,
bool force_probe,
bool report_broken)
{
virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
int ret = 0;
uid_t uid;
gid_t gid;
if (virStorageSourceIsEmpty(disk->src))
goto cleanup;
if (disk->src->backingStore) {
if (force_probe)
virStorageSourceBackingStoreClear(disk->src);
else
goto cleanup;
}
qemuDomainGetImageIds(cfg, vm, disk->src, &uid, &gid);
if (virStorageFileGetMetadata(disk->src,
uid, gid,
cfg->allowDiskFormatProbing,
report_broken) < 0)
ret = -1;
cleanup:
virObjectUnref(cfg);
return ret;
}
/**
* qemuDomainDiskChainElementRevoke:
*
* Revoke access to a single backing chain element. This restores the labels,
* removes cgroup ACLs for devices and removes locks.
*/
void
qemuDomainDiskChainElementRevoke(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virStorageSourcePtr elem)
{
if (virSecurityManagerRestoreImageLabel(driver->securityManager,
vm->def, elem) < 0)
VIR_WARN("Unable to restore security label on %s", NULLSTR(elem->path));
if (qemuTeardownImageCgroup(vm, elem) < 0)
VIR_WARN("Failed to teardown cgroup for disk path %s",
NULLSTR(elem->path));
if (virDomainLockImageDetach(driver->lockManager, vm, elem) < 0)
VIR_WARN("Unable to release lock on %s", NULLSTR(elem->path));
}
/**
* qemuDomainDiskChainElementPrepare:
*
* Allow a VM access to a single element of a disk backing chain; this helper
* ensures that the lock manager, cgroup device controller, and security manager
* labelling are all aware of each new file before it is added to a chain */
int
qemuDomainDiskChainElementPrepare(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virStorageSourcePtr elem,
bool readonly)
{
bool was_readonly = elem->readonly;
virQEMUDriverConfigPtr cfg = NULL;
int ret = -1;
cfg = virQEMUDriverGetConfig(driver);
elem->readonly = readonly;
if (virDomainLockImageAttach(driver->lockManager, cfg->uri, vm, elem) < 0)
goto cleanup;
if (qemuSetupImageCgroup(vm, elem) < 0)
goto cleanup;
if (virSecurityManagerSetImageLabel(driver->securityManager, vm->def,
elem) < 0)
goto cleanup;
ret = 0;
cleanup:
elem->readonly = was_readonly;
virObjectUnref(cfg);
return ret;
}
bool
qemuDomainDiskSourceDiffers(virDomainDiskDefPtr disk,
virDomainDiskDefPtr origDisk)
{
char *diskSrc = NULL, *origDiskSrc = NULL;
bool diskEmpty, origDiskEmpty;
bool ret = true;
diskEmpty = virStorageSourceIsEmpty(disk->src);
origDiskEmpty = virStorageSourceIsEmpty(origDisk->src);
if (diskEmpty && origDiskEmpty)
return false;
if (diskEmpty ^ origDiskEmpty)
return true;
/* This won't be a network storage, so no need to get the diskPriv
* in order to fetch the secret, thus NULL for param2 */
if (qemuGetDriveSourceString(disk->src, NULL, &diskSrc) < 0 ||
qemuGetDriveSourceString(origDisk->src, NULL, &origDiskSrc) < 0)
goto cleanup;
/* So far in qemu disk sources are considered different
* if either path to disk or its format changes. */
ret = virDomainDiskGetFormat(disk) != virDomainDiskGetFormat(origDisk) ||
STRNEQ_NULLABLE(diskSrc, origDiskSrc);
cleanup:
VIR_FREE(diskSrc);
VIR_FREE(origDiskSrc);
return ret;
}
/*
* Makes sure the @disk differs from @orig_disk only by the source
* path and nothing else. Fields that are being checked and the
* information whether they are nullable (may not be specified) or is
* taken from the virDomainDiskDefFormat() code.
*/
bool
qemuDomainDiskChangeSupported(virDomainDiskDefPtr disk,
virDomainDiskDefPtr orig_disk)
{
#define CHECK_EQ(field, field_name, nullable) \
do { \
if (nullable && !disk->field) \
break; \
if (disk->field != orig_disk->field) { \
virReportError(VIR_ERR_OPERATION_UNSUPPORTED, \
_("cannot modify field '%s' of the disk"), \
field_name); \
return false; \
} \
} while (0)
CHECK_EQ(device, "device", false);
CHECK_EQ(bus, "bus", false);
if (STRNEQ(disk->dst, orig_disk->dst)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
_("cannot modify field '%s' of the disk"),
"target");
return false;
}
CHECK_EQ(tray_status, "tray", true);
CHECK_EQ(removable, "removable", true);
if (disk->geometry.cylinders &&
disk->geometry.heads &&
disk->geometry.sectors) {
CHECK_EQ(geometry.cylinders, "geometry cylinders", false);
CHECK_EQ(geometry.heads, "geometry heads", false);
CHECK_EQ(geometry.sectors, "geometry sectors", false);
CHECK_EQ(geometry.trans, "BIOS-translation-modus", true);
}
CHECK_EQ(blockio.logical_block_size,
"blockio logical_block_size", false);
CHECK_EQ(blockio.physical_block_size,
"blockio physical_block_size", false);
CHECK_EQ(blkdeviotune.total_bytes_sec,
"blkdeviotune total_bytes_sec",
true);
CHECK_EQ(blkdeviotune.read_bytes_sec,
"blkdeviotune read_bytes_sec",
true);
CHECK_EQ(blkdeviotune.write_bytes_sec,
"blkdeviotune write_bytes_sec",
true);
CHECK_EQ(blkdeviotune.total_iops_sec,
"blkdeviotune total_iops_sec",
true);
CHECK_EQ(blkdeviotune.read_iops_sec,
"blkdeviotune read_iops_sec",
true);
CHECK_EQ(blkdeviotune.write_iops_sec,
"blkdeviotune write_iops_sec",
true);
CHECK_EQ(blkdeviotune.total_bytes_sec_max,
"blkdeviotune total_bytes_sec_max",
true);
CHECK_EQ(blkdeviotune.read_bytes_sec_max,
"blkdeviotune read_bytes_sec_max",
true);
CHECK_EQ(blkdeviotune.write_bytes_sec_max,
"blkdeviotune write_bytes_sec_max",
true);
CHECK_EQ(blkdeviotune.total_iops_sec_max,
"blkdeviotune total_iops_sec_max",
true);
CHECK_EQ(blkdeviotune.read_iops_sec_max,
"blkdeviotune read_iops_sec_max",
true);
CHECK_EQ(blkdeviotune.write_iops_sec_max,
"blkdeviotune write_iops_sec_max",
true);
CHECK_EQ(blkdeviotune.size_iops_sec,
"blkdeviotune size_iops_sec",
true);
if (disk->serial && STRNEQ_NULLABLE(disk->serial, orig_disk->serial)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
_("cannot modify field '%s' of the disk"),
"serial");
return false;
}
if (disk->wwn && STRNEQ_NULLABLE(disk->wwn, orig_disk->wwn)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
_("cannot modify field '%s' of the disk"),
"wwn");
return false;
}
if (disk->vendor && STRNEQ_NULLABLE(disk->vendor, orig_disk->vendor)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
_("cannot modify field '%s' of the disk"),
"vendor");
return false;
}
if (disk->product && STRNEQ_NULLABLE(disk->product, orig_disk->product)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
_("cannot modify field '%s' of the disk"),
"product");
return false;
}
CHECK_EQ(cachemode, "cache", true);
CHECK_EQ(error_policy, "error_policy", true);
CHECK_EQ(rerror_policy, "rerror_policy", true);
CHECK_EQ(iomode, "io", true);
CHECK_EQ(ioeventfd, "ioeventfd", true);
CHECK_EQ(event_idx, "event_idx", true);
CHECK_EQ(copy_on_read, "copy_on_read", true);
/* "snapshot" is a libvirt internal field and thus can be changed */
/* startupPolicy is allowed to be updated. Therefore not checked here. */
CHECK_EQ(transient, "transient", true);
CHECK_EQ(info.bootIndex, "boot order", true);
CHECK_EQ(rawio, "rawio", true);
CHECK_EQ(sgio, "sgio", true);
CHECK_EQ(discard, "discard", true);
CHECK_EQ(iothread, "iothread", true);
if (disk->domain_name &&
STRNEQ_NULLABLE(disk->domain_name, orig_disk->domain_name)) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
_("cannot modify field '%s' of the disk"),
"backenddomain");
return false;
}
/* checks for fields stored in disk->src */
/* unfortunately 'readonly' and 'shared' can't be converted to tristate
* values thus we need to ignore the check if the new value is 'false' */
CHECK_EQ(src->readonly, "readonly", true);
CHECK_EQ(src->shared, "shared", true);
#undef CHECK_EQ
return true;
}
bool
qemuDomainDiskBlockJobIsActive(virDomainDiskDefPtr disk)
{
qemuDomainDiskPrivatePtr diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk);
if (disk->mirror) {
virReportError(VIR_ERR_BLOCK_COPY_ACTIVE,
_("disk '%s' already in active block job"),
disk->dst);
return true;
}
if (diskPriv->blockjob) {
virReportError(VIR_ERR_OPERATION_UNSUPPORTED,
_("disk '%s' already in active block job"),
disk->dst);
return true;
}
return false;
}
/**
* qemuDomainHasBlockjob:
* @vm: domain object
* @copy_only: Reject only block copy job
*
* Return true if @vm has at least one disk involved in a current block
* copy/commit/pull job. If @copy_only is true this returns true only if the
* disk is involved in a block copy.
* */
bool
qemuDomainHasBlockjob(virDomainObjPtr vm,
bool copy_only)
{
size_t i;
for (i = 0; i < vm->def->ndisks; i++) {
virDomainDiskDefPtr disk = vm->def->disks[i];
qemuDomainDiskPrivatePtr diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk);
if (!copy_only && diskPriv->blockjob)
return true;
if (disk->mirror && disk->mirrorJob == VIR_DOMAIN_BLOCK_JOB_TYPE_COPY)
return true;
}
return false;
}
int
qemuDomainUpdateDeviceList(virQEMUDriverPtr driver,
virDomainObjPtr vm,
int asyncJob)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
char **aliases;
int rc;
if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DEVICE_DEL_EVENT))
return 0;
if (qemuDomainObjEnterMonitorAsync(driver, vm, asyncJob) < 0)
return -1;
rc = qemuMonitorGetDeviceAliases(priv->mon, &aliases);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
return -1;
if (rc < 0)
return -1;
virStringFreeList(priv->qemuDevices);
priv->qemuDevices = aliases;
return 0;
}
int
qemuDomainUpdateMemoryDeviceInfo(virQEMUDriverPtr driver,
virDomainObjPtr vm,
int asyncJob)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
virHashTablePtr meminfo = NULL;
int rc;
size_t i;
if (vm->def->nmems == 0)
return 0;
if (qemuDomainObjEnterMonitorAsync(driver, vm, asyncJob) < 0)
return -1;
rc = qemuMonitorGetMemoryDeviceInfo(priv->mon, &meminfo);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
return -1;
/* if qemu doesn't support the info request, just carry on */
if (rc == -2)
return 0;
if (rc < 0)
return -1;
for (i = 0; i < vm->def->nmems; i++) {
virDomainMemoryDefPtr mem = vm->def->mems[i];
qemuMonitorMemoryDeviceInfoPtr dimm;
if (!mem->info.alias)
continue;
if (!(dimm = virHashLookup(meminfo, mem->info.alias)))
continue;
mem->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_DIMM;
mem->info.addr.dimm.slot = dimm->slot;
mem->info.addr.dimm.base = dimm->address;
}
virHashFree(meminfo);
return 0;
}
bool
qemuDomainDefCheckABIStability(virQEMUDriverPtr driver,
virDomainDefPtr src,
virDomainDefPtr dst)
{
virDomainDefPtr migratableDefSrc = NULL;
virDomainDefPtr migratableDefDst = NULL;
const int flags = VIR_DOMAIN_XML_SECURE | VIR_DOMAIN_XML_UPDATE_CPU | VIR_DOMAIN_XML_MIGRATABLE;
bool ret = false;
if (!(migratableDefSrc = qemuDomainDefCopy(driver, src, flags)) ||
!(migratableDefDst = qemuDomainDefCopy(driver, dst, flags)))
goto cleanup;
ret = virDomainDefCheckABIStability(migratableDefSrc, migratableDefDst);
cleanup:
virDomainDefFree(migratableDefSrc);
virDomainDefFree(migratableDefDst);
return ret;
}
bool
qemuDomainAgentAvailable(virDomainObjPtr vm,
bool reportError)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
if (virDomainObjGetState(vm, NULL) != VIR_DOMAIN_RUNNING) {
if (reportError) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
}
return false;
}
if (priv->agentError) {
if (reportError) {
virReportError(VIR_ERR_AGENT_UNRESPONSIVE, "%s",
_("QEMU guest agent is not "
"available due to an error"));
}
return false;
}
if (!priv->agent) {
if (qemuFindAgentConfig(vm->def)) {
if (reportError) {
virReportError(VIR_ERR_AGENT_UNRESPONSIVE, "%s",
_("QEMU guest agent is not connected"));
}
return false;
} else {
if (reportError) {
virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
_("QEMU guest agent is not configured"));
}
return false;
}
}
return true;
}
static unsigned long long
qemuDomainGetMemorySizeAlignment(virDomainDefPtr def)
{
/* PPC requires the memory sizes to be rounded to 256MiB increments, so
* round them to the size always. */
if (ARCH_IS_PPC64(def->os.arch))
return 256 * 1024;
/* Align memory size. QEMU requires rounding to next 4KiB block.
* We'll take the "traditional" path and round it to 1MiB*/
return 1024;
}
static unsigned long long
qemuDomainGetMemoryModuleSizeAlignment(const virDomainDef *def,
const virDomainMemoryDef *mem ATTRIBUTE_UNUSED)
{
/* PPC requires the memory sizes to be rounded to 256MiB increments, so
* round them to the size always. */
if (ARCH_IS_PPC64(def->os.arch))
return 256 * 1024;
/* dimm memory modules require 2MiB alignment rather than the 1MiB we are
* using elsewhere. */
return 2048;
}
int
qemuDomainAlignMemorySizes(virDomainDefPtr def)
{
unsigned long long maxmemkb = virMemoryMaxValue(false) >> 10;
unsigned long long maxmemcapped = virMemoryMaxValue(true) >> 10;
unsigned long long initialmem = 0;
unsigned long long mem;
unsigned long long align = qemuDomainGetMemorySizeAlignment(def);
size_t ncells = virDomainNumaGetNodeCount(def->numa);
size_t i;
/* align NUMA cell sizes if relevant */
for (i = 0; i < ncells; i++) {
mem = VIR_ROUND_UP(virDomainNumaGetNodeMemorySize(def->numa, i), align);
initialmem += mem;
if (mem > maxmemkb) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("memory size of NUMA node '%zu' overflowed after "
"alignment"), i);
return -1;
}
virDomainNumaSetNodeMemorySize(def->numa, i, mem);
}
/* align initial memory size, if NUMA is present calculate it as total of
* individual aligned NUMA node sizes */
if (initialmem == 0)
initialmem = VIR_ROUND_UP(virDomainDefGetMemoryInitial(def), align);
if (initialmem > maxmemcapped) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("initial memory size overflowed after alignment"));
return -1;
}
virDomainDefSetMemoryInitial(def, initialmem);
def->mem.max_memory = VIR_ROUND_UP(def->mem.max_memory, align);
if (def->mem.max_memory > maxmemkb) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("maximum memory size overflowed after alignment"));
return -1;
}
/* Align memory module sizes */
for (i = 0; i < def->nmems; i++) {
align = qemuDomainGetMemoryModuleSizeAlignment(def, def->mems[i]);
def->mems[i]->size = VIR_ROUND_UP(def->mems[i]->size, align);
if (def->mems[i]->size > maxmemkb) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("size of memory module '%zu' overflowed after "
"alignment"), i);
return -1;
}
}
return 0;
}
/**
* qemuDomainMemoryDeviceAlignSize:
* @mem: memory device definition object
*
* Aligns the size of the memory module as qemu enforces it. The size is updated
* inplace. Default rounding is now to 1 MiB (qemu requires rouding to page,
* size so this should be safe).
*/
void
qemuDomainMemoryDeviceAlignSize(virDomainDefPtr def,
virDomainMemoryDefPtr mem)
{
mem->size = VIR_ROUND_UP(mem->size, qemuDomainGetMemorySizeAlignment(def));
}
/**
* qemuDomainGetMonitor:
* @vm: domain object
*
* Returns the monitor pointer corresponding to the domain object @vm.
*/
qemuMonitorPtr
qemuDomainGetMonitor(virDomainObjPtr vm)
{
return ((qemuDomainObjPrivatePtr) vm->privateData)->mon;
}
/**
* qemuDomainSupportsBlockJobs:
* @vm: domain object
* @modern: pointer to bool that returns whether modern block jobs are supported
*
* Returns -1 in case when qemu does not support block jobs at all. Otherwise
* returns 0 and optionally fills @modern to denote that modern (async) block
* jobs are supported.
*/
int
qemuDomainSupportsBlockJobs(virDomainObjPtr vm,
bool *modern)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
bool asynchronous = virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCKJOB_ASYNC);
bool synchronous = virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BLOCKJOB_SYNC);
if (!synchronous && !asynchronous) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("block jobs not supported with this QEMU binary"));
return -1;
}
if (modern)
*modern = asynchronous;
return 0;
}
/**
* qemuFindAgentConfig:
* @def: domain definition
*
* Returns the pointer to the channel definition that is used to access the
* guest agent if the agent is configured or NULL otherwise.
*/
virDomainChrDefPtr
qemuFindAgentConfig(virDomainDefPtr def)
{
size_t i;
for (i = 0; i < def->nchannels; i++) {
virDomainChrDefPtr channel = def->channels[i];
if (channel->targetType != VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_VIRTIO)
continue;
if (STREQ_NULLABLE(channel->target.name, "org.qemu.guest_agent.0"))
return channel;
}
return NULL;
}
bool
qemuDomainMachineIsQ35(const virDomainDef *def)
{
return (STRPREFIX(def->os.machine, "pc-q35") ||
STREQ(def->os.machine, "q35"));
}
bool
qemuDomainMachineIsI440FX(const virDomainDef *def)
{
return (STREQ(def->os.machine, "pc") ||
STRPREFIX(def->os.machine, "pc-0.") ||
STRPREFIX(def->os.machine, "pc-1.") ||
STRPREFIX(def->os.machine, "pc-i440") ||
STRPREFIX(def->os.machine, "rhel"));
}
bool
qemuDomainMachineNeedsFDC(const virDomainDef *def)
{
char *p = STRSKIP(def->os.machine, "pc-q35-");
if (p) {
if (STRPREFIX(p, "1.") ||
STRPREFIX(p, "2.0") ||
STRPREFIX(p, "2.1") ||
STRPREFIX(p, "2.2") ||
STRPREFIX(p, "2.3"))
return false;
return true;
}
return false;
}
bool
qemuDomainMachineIsS390CCW(const virDomainDef *def)
{
return STRPREFIX(def->os.machine, "s390-ccw");
}
bool
qemuDomainMachineIsVirt(const virDomainDef *def)
{
return STREQ(def->os.machine, "virt") ||
STRPREFIX(def->os.machine, "virt-");
}
static bool
qemuCheckMemoryDimmConflict(const virDomainDef *def,
const virDomainMemoryDef *mem)
{
size_t i;
for (i = 0; i < def->nmems; i++) {
virDomainMemoryDefPtr tmp = def->mems[i];
if (tmp == mem ||
tmp->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_DIMM)
continue;
if (mem->info.addr.dimm.slot == tmp->info.addr.dimm.slot) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("memory device slot '%u' is already being "
"used by another memory device"),
mem->info.addr.dimm.slot);
return true;
}
if (mem->info.addr.dimm.base != 0 &&
mem->info.addr.dimm.base == tmp->info.addr.dimm.base) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("memory device base '0x%llx' is already being "
"used by another memory device"),
mem->info.addr.dimm.base);
return true;
}
}
return false;
}
static int
qemuDomainDefValidateMemoryHotplugDevice(const virDomainMemoryDef *mem,
const virDomainDef *def)
{
switch ((virDomainMemoryModel) mem->model) {
case VIR_DOMAIN_MEMORY_MODEL_DIMM:
if (mem->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_DIMM &&
mem->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("only 'dimm' addresses are supported for the "
"pc-dimm device"));
return -1;
}
if (virDomainNumaGetNodeCount(def->numa) != 0) {
if (mem->targetNode == -1) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("target NUMA node needs to be specified for "
"memory device"));
return -1;
}
}
if (mem->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_DIMM) {
if (mem->info.addr.dimm.slot >= def->mem.memory_slots) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("memory device slot '%u' exceeds slots "
"count '%u'"),
mem->info.addr.dimm.slot, def->mem.memory_slots);
return -1;
}
if (qemuCheckMemoryDimmConflict(def, mem))
return -1;
}
break;
case VIR_DOMAIN_MEMORY_MODEL_NONE:
case VIR_DOMAIN_MEMORY_MODEL_LAST:
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("invalid memory device type"));
return -1;
}
return 0;
}
/**
* qemuDomainDefValidateMemoryHotplug:
* @def: domain definition
* @qemuCaps: qemu capabilities object
* @mem: definition of memory device that is to be added to @def with hotplug,
* NULL in case of regular VM startup
*
* Validates that the domain definition and memory modules have valid
* configuration and are possibly able to accept @mem via hotplug if it's
* non-NULL.
*
* Returns 0 on success; -1 and a libvirt error on error.
*/
int
qemuDomainDefValidateMemoryHotplug(const virDomainDef *def,
virQEMUCapsPtr qemuCaps,
const virDomainMemoryDef *mem)
{
unsigned int nmems = def->nmems;
unsigned long long hotplugSpace;
unsigned long long hotplugMemory = 0;
size_t i;
hotplugSpace = def->mem.max_memory - virDomainDefGetMemoryInitial(def);
if (mem) {
nmems++;
hotplugMemory = mem->size;
if (qemuDomainDefValidateMemoryHotplugDevice(mem, def) < 0)
return -1;
}
if (!virDomainDefHasMemoryHotplug(def)) {
if (nmems) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("cannot use/hotplug a memory device when domain "
"'maxMemory' is not defined"));
return -1;
}
return 0;
}
if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_PC_DIMM)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("memory hotplug isn't supported by this QEMU binary"));
return -1;
}
if (!ARCH_IS_PPC64(def->os.arch)) {
/* due to guest support, qemu would silently enable NUMA with one node
* once the memory hotplug backend is enabled. To avoid possible
* confusion we will enforce user originated numa configuration along
* with memory hotplug. */
if (virDomainNumaGetNodeCount(def->numa) == 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("At least one numa node has to be configured when "
"enabling memory hotplug"));
return -1;
}
}
if (nmems > def->mem.memory_slots) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("memory device count '%u' exceeds slots count '%u'"),
nmems, def->mem.memory_slots);
return -1;
}
for (i = 0; i < def->nmems; i++) {
hotplugMemory += def->mems[i]->size;
/* already existing devices don't need to be checked on hotplug */
if (!mem &&
qemuDomainDefValidateMemoryHotplugDevice(def->mems[i], def) < 0)
return -1;
}
if (hotplugMemory > hotplugSpace) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("memory device total size exceeds hotplug space"));
return -1;
}
return 0;
}
bool
qemuDomainMachineHasBuiltinIDE(const virDomainDef *def)
{
return qemuDomainMachineIsI440FX(def) ||
STREQ(def->os.machine, "malta") ||
STREQ(def->os.machine, "sun4u") ||
STREQ(def->os.machine, "g3beige");
}
/**
* qemuDomainUpdateCurrentMemorySize:
*
* Updates the current balloon size from the monitor if necessary. In case when
* the balloon is not present for the domain, the function recalculates the
* maximum size to reflect possible changes.
*
* Returns 0 on success and updates vm->def->mem.cur_balloon if necessary, -1 on
* error and reports libvirt error.
*/
int
qemuDomainUpdateCurrentMemorySize(virQEMUDriverPtr driver,
virDomainObjPtr vm)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
unsigned long long balloon;
int ret = -1;
/* inactive domain doesn't need size update */
if (!virDomainObjIsActive(vm))
return 0;
/* if no balloning is available, the current size equals to the current
* full memory size */
if (!virDomainDefHasMemballoon(vm->def)) {
vm->def->mem.cur_balloon = virDomainDefGetMemoryActual(vm->def);
return 0;
}
/* current size is always automagically updated via the event */
if (virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_BALLOON_EVENT))
return 0;
/* here we need to ask the monitor */
/* Don't delay if someone's using the monitor, just use existing most
* recent data instead */
if (qemuDomainJobAllowed(priv, QEMU_JOB_QUERY)) {
if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
return -1;
if (!virDomainObjIsActive(vm)) {
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("domain is not running"));
goto endjob;
}
qemuDomainObjEnterMonitor(driver, vm);
ret = qemuMonitorGetBalloonInfo(priv->mon, &balloon);
if (qemuDomainObjExitMonitor(driver, vm) < 0)
ret = -1;
endjob:
qemuDomainObjEndJob(driver, vm);
if (ret < 0)
return -1;
vm->def->mem.cur_balloon = balloon;
}
return 0;
}
/**
* qemuDomainGetMemLockLimitBytes:
*
* @def: domain definition
*
* Returns the size of the memory in bytes that needs to be set as
* RLIMIT_MEMLOCK for the QEMU process.
* If a mem.hard_limit is set, then that value is preferred; otherwise, the
* value returned may depend upon the architecture or devices present.
*/
unsigned long long
qemuDomainGetMemLockLimitBytes(virDomainDefPtr def)
{
unsigned long long memKB;
/* prefer the hard limit */
if (virMemoryLimitIsSet(def->mem.hard_limit)) {
memKB = def->mem.hard_limit;
goto done;
}
if (ARCH_IS_PPC64(def->os.arch)) {
unsigned long long maxMemory;
unsigned long long memory;
unsigned long long baseLimit;
unsigned long long passthroughLimit;
size_t nPCIHostBridges;
size_t i;
bool usesVFIO = false;
/* TODO: Detect at runtime once we start using more than just
* the default PCI Host Bridge */
nPCIHostBridges = 1;
for (i = 0; i < def->nhostdevs; i++) {
virDomainHostdevDefPtr dev = def->hostdevs[i];
if (dev->mode == VIR_DOMAIN_HOSTDEV_MODE_SUBSYS &&
dev->source.subsys.type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI &&
dev->source.subsys.u.pci.backend == VIR_DOMAIN_HOSTDEV_PCI_BACKEND_VFIO) {
usesVFIO = true;
break;
}
}
memory = virDomainDefGetMemoryActual(def);
if (def->mem.max_memory)
maxMemory = def->mem.max_memory;
else
maxMemory = memory;
/* baseLimit := maxMemory / 128 (a)
* + 4 MiB * #PHBs + 8 MiB (b)
*
* (a) is the hash table
*
* (b) is accounting for the 32-bit DMA window - it could be either the
* KVM accelerated TCE tables for emulated devices, or the VFIO
* userspace view. The 4 MiB per-PHB (including the default one) covers
* a 2GiB DMA window: default is 1GiB, but it's possible it'll be
* increased to help performance. The 8 MiB extra should be plenty for
* the TCE table index for any reasonable number of PHBs and several
* spapr-vlan or spapr-vscsi devices (512kB + a tiny bit each) */
baseLimit = maxMemory / 128 +
4096 * nPCIHostBridges +
8192;
/* passthroughLimit := max( 2 GiB * #PHBs, (c)
* memory (d)
* + memory * 1/512 * #PHBs + 8 MiB ) (e)
*
* (c) is the pre-DDW VFIO DMA window accounting. We're allowing 2 GiB
* rather than 1 GiB
*
* (d) is the with-DDW (and memory pre-registration and related
* features) DMA window accounting - assuming that we only account RAM
* once, even if mapped to multiple PHBs
*
* (e) is the with-DDW userspace view and overhead for the 64-bit DMA
* window. This is based a bit on expected guest behaviour, but there
* really isn't a way to completely avoid that. We assume the guest
* requests a 64-bit DMA window (per PHB) just big enough to map all
* its RAM. 4 kiB page size gives the 1/512; it will be less with 64
* kiB pages, less still if the guest is mapped with hugepages (unlike
* the default 32-bit DMA window, DDW windows can use large IOMMU
* pages). 8 MiB is for second and further level overheads, like (b) */
passthroughLimit = MAX(2 * 1024 * 1024 * nPCIHostBridges,
memory +
memory / 512 * nPCIHostBridges + 8192);
if (usesVFIO)
memKB = baseLimit + passthroughLimit;
else
memKB = baseLimit;
goto done;
}
/* For device passthrough using VFIO the guest memory and MMIO memory
* regions need to be locked persistent in order to allow DMA.
*
* Currently the below limit is based on assumptions about the x86 platform.
*
* The chosen value of 1GiB below originates from x86 systems where it was
* used as space reserved for the MMIO region for the whole system.
*
* On x86_64 systems the MMIO regions of the IOMMU mapped devices don't
* count towards the locked memory limit since the memory is owned by the
* device. Emulated devices though do count, but the regions are usually
* small. Although it's not guaranteed that the limit will be enough for all
* configurations it didn't pose a problem for now.
*
* http://www.redhat.com/archives/libvir-list/2015-November/msg00329.html
*
* Note that this may not be valid for all platforms.
*/
memKB = virDomainDefGetMemoryActual(def) + 1024 * 1024;
done:
return memKB << 10;
}
/**
* @def: domain definition
*
* Returns true if the locked memory limit needs to be set or updated because
* of domain configuration, VFIO passthrough devices or architecture-specific
* requirements.
* */
bool
qemuDomainRequiresMemLock(virDomainDefPtr def)
{
size_t i;
if (def->mem.locked)
return true;
/* ppc64 domains need to lock some memory even when VFIO is not used */
if (ARCH_IS_PPC64(def->os.arch))
return true;
for (i = 0; i < def->nhostdevs; i++) {
virDomainHostdevDefPtr dev = def->hostdevs[i];
if (dev->mode == VIR_DOMAIN_HOSTDEV_MODE_SUBSYS &&
dev->source.subsys.type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI &&
dev->source.subsys.u.pci.backend == VIR_DOMAIN_HOSTDEV_PCI_BACKEND_VFIO)
return true;
}
return false;
}
/**
* qemuDomainAdjustMaxMemLock:
* @vm: domain
*
* Adjust the memory locking limit for the QEMU process associated to @vm, in
* order to comply with VFIO or architecture requirements.
*
* The limit will not be changed unless doing so is needed; the first time
* the limit is changed, the original (default) limit is stored in @vm and
* that value will be restored if qemuDomainAdjustMaxMemLock() is called once
* memory locking is no longer required.
*
* Returns: 0 on success, <0 on failure
*/
int
qemuDomainAdjustMaxMemLock(virDomainObjPtr vm)
{
unsigned long long bytes = 0;
int ret = -1;
if (qemuDomainRequiresMemLock(vm->def)) {
/* If this is the first time adjusting the limit, save the current
* value so that we can restore it once memory locking is no longer
* required. Failing to obtain the current limit is not a critical
* failure, it just means we'll be unable to lower it later */
if (!vm->original_memlock) {
if (virProcessGetMaxMemLock(vm->pid, &(vm->original_memlock)) < 0)
vm->original_memlock = 0;
}
bytes = qemuDomainGetMemLockLimitBytes(vm->def);
} else {
/* Once memory locking is no longer required, we can restore the
* original, usually very low, limit */
bytes = vm->original_memlock;
vm->original_memlock = 0;
}
/* Trying to set the memory locking limit to zero is a no-op */
if (virProcessSetMaxMemLock(vm->pid, bytes) < 0)
goto out;
ret = 0;
out:
return ret;
}
/**
* qemuDomainHasVcpuPids:
* @vm: Domain object
*
* Returns true if we were able to successfully detect vCPU pids for the VM.
*/
bool
qemuDomainHasVcpuPids(virDomainObjPtr vm)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
return priv->nvcpupids > 0;
}
/**
* qemuDomainGetVcpuPid:
* @vm: domain object
* @vcpu: cpu id
*
* Returns the vCPU pid. If @vcpu is offline or out of range 0 is returned.
*/
pid_t
qemuDomainGetVcpuPid(virDomainObjPtr vm,
unsigned int vcpu)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
if (vcpu >= priv->nvcpupids)
return 0;
return priv->vcpupids[vcpu];
}
/**
* qemuDomainDetectVcpuPids:
* @driver: qemu driver data
* @vm: domain object
* @asyncJob: current asynchronous job type
*
* Updates vCPU thread ids in the private data of @vm.
*
* Returns number of detected vCPU threads on success, -1 on error and reports
* an appropriate error, -2 if the domain doesn't exist any more.
*/
int
qemuDomainDetectVcpuPids(virQEMUDriverPtr driver,
virDomainObjPtr vm,
int asyncJob)
{
pid_t *cpupids = NULL;
int ncpupids = 0;
qemuDomainObjPrivatePtr priv = vm->privateData;
/*
* Current QEMU *can* report info about host threads mapped
* to vCPUs, but it is not in a manner we can correctly
* deal with. The TCG CPU emulation does have a separate vCPU
* thread, but it runs every vCPU in that same thread. So it
* is impossible to setup different affinity per thread.
*
* What's more the 'query-cpus' command returns bizarre
* data for the threads. It gives the TCG thread for the
* vCPU 0, but for vCPUs 1-> N, it actually replies with
* the main process thread ID.
*
* The result is that when we try to set affinity for
* vCPU 1, it will actually change the affinity of the
* emulator thread :-( When you try to set affinity for
* vCPUs 2, 3.... it will fail if the affinity was
* different from vCPU 1.
*
* We *could* allow vcpu pinning with TCG, if we made the
* restriction that all vCPUs had the same mask. This would
* at least let us separate emulator from vCPUs threads, as
* we do for KVM. It would need some changes to our cgroups
* CPU layout though, and error reporting for the config
* restrictions.
*
* Just disable CPU pinning with TCG until someone wants
* to try to do this hard work.
*/
if (vm->def->virtType == VIR_DOMAIN_VIRT_QEMU)
goto done;
if (qemuDomainObjEnterMonitorAsync(driver, vm, asyncJob) < 0)
return -1;
ncpupids = qemuMonitorGetCPUInfo(priv->mon, &cpupids);
if (qemuDomainObjExitMonitor(driver, vm) < 0) {
VIR_FREE(cpupids);
return -2;
}
/* failure to get the VCPU <-> PID mapping or to execute the query
* command will not be treated fatal as some versions of qemu don't
* support this command */
if (ncpupids <= 0) {
virResetLastError();
ncpupids = 0;
goto done;
}
if (ncpupids != virDomainDefGetVcpus(vm->def)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("got wrong number of vCPU pids from QEMU monitor. "
"got %d, wanted %d"),
ncpupids, virDomainDefGetVcpus(vm->def));
VIR_FREE(cpupids);
return -1;
}
done:
VIR_FREE(priv->vcpupids);
priv->nvcpupids = ncpupids;
priv->vcpupids = cpupids;
return ncpupids;
}
bool
qemuDomainSupportsNicdev(virDomainDefPtr def,
virDomainNetDefPtr net)
{
/* non-virtio ARM nics require legacy -net nic */
if (((def->os.arch == VIR_ARCH_ARMV7L) ||
(def->os.arch == VIR_ARCH_AARCH64)) &&
net->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_VIRTIO_MMIO &&
net->info.type != VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI)
return false;
return true;
}
bool
qemuDomainSupportsNetdev(virDomainDefPtr def,
virQEMUCapsPtr qemuCaps,
virDomainNetDefPtr net)
{
if (!qemuDomainSupportsNicdev(def, net))
return false;
return virQEMUCapsGet(qemuCaps, QEMU_CAPS_NETDEV);
}
int
qemuDomainNetVLAN(virDomainNetDefPtr def)
{
return qemuDomainDeviceAliasIndex(&def->info, "net");
}
virDomainDiskDefPtr
qemuDomainDiskByName(virDomainDefPtr def,
const char *name)
{
virDomainDiskDefPtr ret;
if (!(ret = virDomainDiskByName(def, name, true))) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
_("No device found for specified path"));
return NULL;
}
return ret;
}
/**
* qemuDomainDefValidateDiskLunSource:
* @src: disk source struct
*
* Validate whether the disk source is valid for disk device='lun'.
*
* Returns 0 if the configuration is valid -1 and a libvirt error if the soure
* is invalid.
*/
int
qemuDomainDefValidateDiskLunSource(const virStorageSource *src)
{
if (virStorageSourceGetActualType(src) == VIR_STORAGE_TYPE_NETWORK) {
if (src->protocol != VIR_STORAGE_NET_PROTOCOL_ISCSI) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("disk device='lun' is not supported "
"for protocol='%s'"),
virStorageNetProtocolTypeToString(src->protocol));
return -1;
}
} else if (!virStorageSourceIsBlockLocal(src)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("disk device='lun' is only valid for block "
"type disk source"));
return -1;
}
return 0;
}
int
qemuDomainPrepareChannel(virDomainChrDefPtr channel,
const char *domainChannelTargetDir)
{
if (channel->targetType == VIR_DOMAIN_CHR_CHANNEL_TARGET_TYPE_VIRTIO &&
channel->source.type == VIR_DOMAIN_CHR_TYPE_UNIX &&
!channel->source.data.nix.path) {
if (virAsprintf(&channel->source.data.nix.path,
"%s/%s", domainChannelTargetDir,
channel->target.name ? channel->target.name
: "unknown.sock") < 0)
return -1;
channel->source.data.nix.listen = true;
}
return 0;
}
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