예제 #1
0
파일: qemu_conf.c 프로젝트: Lantame/libvirt
/**
 * virQEMUDriverGetCapabilities:
 *
 * Get a reference to the virCapsPtr instance for the
 * driver. If @refresh is true, the capabilities will be
 * rebuilt first
 *
 * The caller must release the reference with virObjetUnref
 *
 * Returns: a reference to a virCapsPtr instance or NULL
 */
virCapsPtr virQEMUDriverGetCapabilities(virQEMUDriverPtr driver,
                                        bool refresh)
{
    virCapsPtr ret = NULL;
    if (refresh) {
        virCapsPtr caps = NULL;
        if ((caps = virQEMUDriverCreateCapabilities(driver)) == NULL)
            return NULL;

        qemuDriverLock(driver);
        virObjectUnref(driver->caps);
        driver->caps = caps;
    } else {
        qemuDriverLock(driver);
    }

    if (driver->caps->nguests == 0 && !refresh) {
        VIR_DEBUG("Capabilities didn't detect any guests. Forcing a "
            "refresh.");
        qemuDriverUnlock(driver);
        return virQEMUDriverGetCapabilities(driver, true);
    }

    ret = virObjectRef(driver->caps);
    qemuDriverUnlock(driver);
    return ret;
}
예제 #2
0
파일: qemu_conf.c 프로젝트: Lantame/libvirt
virQEMUDriverConfigPtr virQEMUDriverGetConfig(virQEMUDriverPtr driver)
{
    virQEMUDriverConfigPtr conf;
    qemuDriverLock(driver);
    conf = virObjectRef(driver->config);
    qemuDriverUnlock(driver);
    return conf;
}
예제 #3
0
/**
 * virQEMUDriverGetCapabilities:
 *
 * Get a reference to the virCapsPtr instance for the
 * driver. If @refresh is true, the capabilities will be
 * rebuilt first
 *
 * The caller must release the reference with virObjetUnref
 *
 * Returns: a reference to a virCapsPtr instance or NULL
 */
virCapsPtr virQEMUDriverGetCapabilities(virQEMUDriverPtr driver,
                                        bool refresh)
{
    virCapsPtr ret = NULL;
    if (refresh) {
        virCapsPtr caps = NULL;
        if ((caps = virQEMUDriverCreateCapabilities(driver)) == NULL)
            return NULL;

        qemuDriverLock(driver);
        virObjectUnref(driver->caps);
        driver->caps = caps;
    } else {
        qemuDriverLock(driver);
    }

    ret = virObjectRef(driver->caps);
    qemuDriverUnlock(driver);
    return ret;
}
예제 #4
0
int
qemuMigrationWaitForCompletion(struct qemud_driver *driver, virDomainObjPtr vm)
{
    int ret = -1;
    int status;
    unsigned long long memProcessed;
    unsigned long long memRemaining;
    unsigned long long memTotal;
    qemuDomainObjPrivatePtr priv = vm->privateData;

    priv->jobInfo.type = VIR_DOMAIN_JOB_UNBOUNDED;

    while (priv->jobInfo.type == VIR_DOMAIN_JOB_UNBOUNDED) {
        /* Poll every 50ms for progress & to allow cancellation */
        struct timespec ts = { .tv_sec = 0, .tv_nsec = 50 * 1000 * 1000ull };
        struct timeval now;
        int rc;
        const char *job;

        switch (priv->jobActive) {
            case QEMU_JOB_MIGRATION_OUT:
                job = _("migration job");
                break;
            case QEMU_JOB_SAVE:
                job = _("domain save job");
                break;
            case QEMU_JOB_DUMP:
                job = _("domain core dump job");
                break;
            default:
                job = _("job");
        }


        if (!virDomainObjIsActive(vm)) {
            qemuReportError(VIR_ERR_INTERNAL_ERROR, _("%s: %s"),
                            job, _("guest unexpectedly quit"));
            goto cleanup;
        }

        if (priv->jobSignals & QEMU_JOB_SIGNAL_CANCEL) {
            priv->jobSignals ^= QEMU_JOB_SIGNAL_CANCEL;
            VIR_DEBUG0("Cancelling job at client request");
            qemuDomainObjEnterMonitorWithDriver(driver, vm);
            rc = qemuMonitorMigrateCancel(priv->mon);
            qemuDomainObjExitMonitorWithDriver(driver, vm);
            if (rc < 0) {
                VIR_WARN0("Unable to cancel job");
            }
        } else if (priv->jobSignals & QEMU_JOB_SIGNAL_SUSPEND) {
            priv->jobSignals ^= QEMU_JOB_SIGNAL_SUSPEND;
            VIR_DEBUG0("Pausing domain for non-live migration");
            if (qemuMigrationSetOffline(driver, vm) < 0)
                VIR_WARN0("Unable to pause domain");
        } else if (priv->jobSignals & QEMU_JOB_SIGNAL_MIGRATE_DOWNTIME) {
            unsigned long long ms = priv->jobSignalsData.migrateDowntime;

            priv->jobSignals ^= QEMU_JOB_SIGNAL_MIGRATE_DOWNTIME;
            priv->jobSignalsData.migrateDowntime = 0;
            VIR_DEBUG("Setting migration downtime to %llums", ms);
            qemuDomainObjEnterMonitorWithDriver(driver, vm);
            rc = qemuMonitorSetMigrationDowntime(priv->mon, ms);
            qemuDomainObjExitMonitorWithDriver(driver, vm);
            if (rc < 0)
                VIR_WARN0("Unable to set migration downtime");
        } else if (priv->jobSignals & QEMU_JOB_SIGNAL_MIGRATE_SPEED) {
            unsigned long bandwidth = priv->jobSignalsData.migrateBandwidth;

            priv->jobSignals ^= QEMU_JOB_SIGNAL_MIGRATE_SPEED;
            priv->jobSignalsData.migrateBandwidth = 0;
            VIR_DEBUG("Setting migration bandwidth to %luMbs", bandwidth);
            qemuDomainObjEnterMonitorWithDriver(driver, vm);
            rc = qemuMonitorSetMigrationSpeed(priv->mon, bandwidth);
            qemuDomainObjExitMonitorWithDriver(driver, vm);
            if (rc < 0)
                VIR_WARN0("Unable to set migration speed");
        }

        /* Repeat check because the job signals might have caused
         * guest to die
         */
        if (!virDomainObjIsActive(vm)) {
            qemuReportError(VIR_ERR_INTERNAL_ERROR, _("%s: %s"),
                            job, _("guest unexpectedly quit"));
            goto cleanup;
        }

        qemuDomainObjEnterMonitorWithDriver(driver, vm);
        rc = qemuMonitorGetMigrationStatus(priv->mon,
                                           &status,
                                           &memProcessed,
                                           &memRemaining,
                                           &memTotal);
        qemuDomainObjExitMonitorWithDriver(driver, vm);

        if (rc < 0) {
            priv->jobInfo.type = VIR_DOMAIN_JOB_FAILED;
            goto cleanup;
        }

        if (gettimeofday(&now, NULL) < 0) {
            priv->jobInfo.type = VIR_DOMAIN_JOB_FAILED;
            virReportSystemError(errno, "%s",
                                 _("cannot get time of day"));
            goto cleanup;
        }
        priv->jobInfo.timeElapsed = timeval_to_ms(now) - priv->jobStart;

        switch (status) {
        case QEMU_MONITOR_MIGRATION_STATUS_INACTIVE:
            priv->jobInfo.type = VIR_DOMAIN_JOB_NONE;
            qemuReportError(VIR_ERR_OPERATION_FAILED,
                            _("%s: %s"), job, _("is not active"));
            break;

        case QEMU_MONITOR_MIGRATION_STATUS_ACTIVE:
            priv->jobInfo.dataTotal = memTotal;
            priv->jobInfo.dataRemaining = memRemaining;
            priv->jobInfo.dataProcessed = memProcessed;

            priv->jobInfo.memTotal = memTotal;
            priv->jobInfo.memRemaining = memRemaining;
            priv->jobInfo.memProcessed = memProcessed;
            break;

        case QEMU_MONITOR_MIGRATION_STATUS_COMPLETED:
            priv->jobInfo.type = VIR_DOMAIN_JOB_COMPLETED;
            ret = 0;
            break;

        case QEMU_MONITOR_MIGRATION_STATUS_ERROR:
            priv->jobInfo.type = VIR_DOMAIN_JOB_FAILED;
            qemuReportError(VIR_ERR_OPERATION_FAILED,
                            _("%s: %s"), job, _("unexpectedly failed"));
            break;

        case QEMU_MONITOR_MIGRATION_STATUS_CANCELLED:
            priv->jobInfo.type = VIR_DOMAIN_JOB_CANCELLED;
            qemuReportError(VIR_ERR_OPERATION_FAILED,
                            _("%s: %s"), job, _("canceled by client"));
            break;
        }

        virDomainObjUnlock(vm);
        qemuDriverUnlock(driver);

        nanosleep(&ts, NULL);

        qemuDriverLock(driver);
        virDomainObjLock(vm);
    }

cleanup:
    return ret;
}


/* Prepare is the first step, and it runs on the destination host.
 *
 * This version starts an empty VM listening on a localhost TCP port, and
 * sets up the corresponding virStream to handle the incoming data.
 */
int
qemuMigrationPrepareTunnel(struct qemud_driver *driver,
                           virConnectPtr dconn,
                           virStreamPtr st,
                           const char *dname,
                           const char *dom_xml)
{
    virDomainDefPtr def = NULL;
    virDomainObjPtr vm = NULL;
    virDomainEventPtr event = NULL;
    int ret = -1;
    int internalret;
    int dataFD[2] = { -1, -1 };
    virBitmapPtr qemuCaps = NULL;
    qemuDomainObjPrivatePtr priv = NULL;
    struct timeval now;

    if (gettimeofday(&now, NULL) < 0) {
        virReportSystemError(errno, "%s",
                             _("cannot get time of day"));
        return -1;
    }

    /* Parse the domain XML. */
    if (!(def = virDomainDefParseString(driver->caps, dom_xml,
                                        VIR_DOMAIN_XML_INACTIVE)))
        goto cleanup;

    if (!qemuMigrationIsAllowed(def))
        goto cleanup;

    /* Target domain name, maybe renamed. */
    if (dname) {
        VIR_FREE(def->name);
        def->name = strdup(dname);
        if (def->name == NULL)
            goto cleanup;
    }

    if (virDomainObjIsDuplicate(&driver->domains, def, 1) < 0)
        goto cleanup;

    if (!(vm = virDomainAssignDef(driver->caps,
                                  &driver->domains,
                                  def, true))) {
        /* virDomainAssignDef already set the error */
        goto cleanup;
    }
    def = NULL;
    priv = vm->privateData;

    if (qemuDomainObjBeginJobWithDriver(driver, vm) < 0)
        goto cleanup;
    priv->jobActive = QEMU_JOB_MIGRATION_OUT;

    /* Domain starts inactive, even if the domain XML had an id field. */
    vm->def->id = -1;

    if (pipe(dataFD) < 0 ||
        virSetCloseExec(dataFD[0]) < 0) {
        virReportSystemError(errno, "%s",
                             _("cannot create pipe for tunnelled migration"));
        goto endjob;
    }

    /* check that this qemu version supports the interactive exec */
    if (qemuCapsExtractVersionInfo(vm->def->emulator, vm->def->os.arch,
                                   NULL, &qemuCaps) < 0) {
        qemuReportError(VIR_ERR_INTERNAL_ERROR,
                        _("Cannot determine QEMU argv syntax %s"),
                        vm->def->emulator);
        goto endjob;
    }
    /* Start the QEMU daemon, with the same command-line arguments plus
     * -incoming stdin (which qemu_command might convert to exec:cat or fd:n)
     */
    internalret = qemuProcessStart(dconn, driver, vm, "stdin", true, dataFD[1],
                                   NULL, VIR_VM_OP_MIGRATE_IN_START);
    if (internalret < 0) {
        qemuAuditDomainStart(vm, "migrated", false);
        /* Note that we don't set an error here because qemuProcessStart
         * should have already done that.
         */
        if (!vm->persistent) {
            virDomainRemoveInactive(&driver->domains, vm);
            vm = NULL;
        }
        goto endjob;
    }

    if (virFDStreamOpen(st, dataFD[0]) < 0) {
        qemuAuditDomainStart(vm, "migrated", false);
        qemuProcessStop(driver, vm, 0);
        if (!vm->persistent) {
            if (qemuDomainObjEndJob(vm) > 0)
                virDomainRemoveInactive(&driver->domains, vm);
            vm = NULL;
        }
        virReportSystemError(errno, "%s",
                             _("cannot pass pipe for tunnelled migration"));
        goto endjob;
    }

    qemuAuditDomainStart(vm, "migrated", true);

    event = virDomainEventNewFromObj(vm,
                                     VIR_DOMAIN_EVENT_STARTED,
                                     VIR_DOMAIN_EVENT_STARTED_MIGRATED);
    ret = 0;

endjob:
    if (vm &&
        qemuDomainObjEndJob(vm) == 0)
        vm = NULL;

    /* We set a fake job active which is held across
     * API calls until the finish() call. This prevents
     * any other APIs being invoked while incoming
     * migration is taking place
     */
    if (vm &&
        virDomainObjIsActive(vm)) {
        priv->jobActive = QEMU_JOB_MIGRATION_IN;
        priv->jobInfo.type = VIR_DOMAIN_JOB_UNBOUNDED;
        priv->jobStart = timeval_to_ms(now);
    }

cleanup:
    qemuCapsFree(qemuCaps);
    virDomainDefFree(def);
    VIR_FORCE_CLOSE(dataFD[0]);
    VIR_FORCE_CLOSE(dataFD[1]);
    if (vm)
        virDomainObjUnlock(vm);
    if (event)
        qemuDomainEventQueue(driver, event);
    qemuDriverUnlock(driver);
    return ret;
}