/** * qemuBlockJobUpdate: * @driver: qemu driver * @vm: domain * @disk: domain disk * @error: error (output parameter) * * Update disk's mirror state in response to a block job event stored in * blockJobStatus by qemuProcessHandleBlockJob event handler. * * Returns the block job event processed or -1 if there was no pending event. */ int qemuBlockJobUpdate(virQEMUDriverPtr driver, virDomainObjPtr vm, qemuDomainAsyncJob asyncJob, virDomainDiskDefPtr disk, char **error) { qemuDomainDiskPrivatePtr diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk); int status = diskPriv->blockJobStatus; if (error) *error = NULL; if (status != -1) { qemuBlockJobEventProcess(driver, vm, disk, asyncJob, diskPriv->blockJobType, diskPriv->blockJobStatus); diskPriv->blockJobStatus = -1; if (error) VIR_STEAL_PTR(*error, diskPriv->blockJobError); else VIR_FREE(diskPriv->blockJobError); } return status; }
/** * qemuBlockJobSyncBegin: * @disk: domain disk * * Begin a new synchronous block job for @disk. The synchronous * block job is ended by a call to qemuBlockJobSyncEnd, or by * the guest quitting. * * During a synchronous block job, a block job event for @disk * will not be processed asynchronously. Instead, it will be * processed only when qemuBlockJobUpdate or qemuBlockJobSyncEnd * is called. */ void qemuBlockJobSyncBegin(virDomainDiskDefPtr disk) { qemuDomainDiskPrivatePtr diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk); VIR_DEBUG("disk=%s", disk->dst); diskPriv->blockJobSync = true; diskPriv->blockJobStatus = -1; }
qemuBlockJobDataPtr qemuBlockJobGetByDisk(virDomainDiskDefPtr disk) { qemuBlockJobDataPtr job = QEMU_DOMAIN_DISK_PRIVATE(disk)->blockjob; if (!job) return NULL; return virObjectRef(job); }
/** * qemuBlockJobSyncEnd: * @driver: qemu driver * @vm: domain * @disk: domain disk * * End a synchronous block job for @disk. Any pending block job event * for the disk is processed. */ void qemuBlockJobSyncEnd(virQEMUDriverPtr driver, virDomainObjPtr vm, qemuDomainAsyncJob asyncJob, virDomainDiskDefPtr disk) { VIR_DEBUG("disk=%s", disk->dst); qemuBlockJobUpdate(driver, vm, asyncJob, disk, NULL); QEMU_DOMAIN_DISK_PRIVATE(disk)->blockJobSync = false; }
static void qemuBlockJobTerminate(qemuBlockJobDataPtr job) { qemuDomainDiskPrivatePtr diskPriv; if (job->disk) { diskPriv = QEMU_DOMAIN_DISK_PRIVATE(job->disk); if (job == diskPriv->blockjob) { virObjectUnref(diskPriv->blockjob); diskPriv->blockjob = NULL; } } }
/** * qemuBlockJobDiskNew: * @disk: disk definition * * Start/associate a new blockjob with @disk. * * Returns 0 on success and -1 on failure. */ qemuBlockJobDataPtr qemuBlockJobDiskNew(virDomainDiskDefPtr disk, qemuBlockJobType type, const char *jobname) { qemuBlockJobDataPtr job = NULL; if (!(job = qemuBlockJobDataNew(type, jobname))) return NULL; job->disk = disk; if (disk) QEMU_DOMAIN_DISK_PRIVATE(disk)->blockjob = virObjectRef(job); return job; }
/** * qemuBlockJobEventProcess: * @driver: qemu driver * @vm: domain * @disk: domain disk * @type: block job type * @status: block job status * * Update disk's mirror state in response to a block job event * from QEMU. For mirror state's that must survive libvirt * restart, also update the domain's status XML. */ void qemuBlockJobEventProcess(virQEMUDriverPtr driver, virDomainObjPtr vm, virDomainDiskDefPtr disk, qemuDomainAsyncJob asyncJob, int type, int status) { virObjectEventPtr event = NULL; virObjectEventPtr event2 = NULL; const char *path; virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver); virDomainDiskDefPtr persistDisk = NULL; qemuDomainDiskPrivatePtr diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk); VIR_DEBUG("disk=%s, mirrorState=%s, type=%d, status=%d", disk->dst, NULLSTR(virDomainDiskMirrorStateTypeToString(disk->mirrorState)), type, status); /* Have to generate two variants of the event for old vs. new * client callbacks */ if (type == VIR_DOMAIN_BLOCK_JOB_TYPE_COMMIT && disk->mirrorJob == VIR_DOMAIN_BLOCK_JOB_TYPE_ACTIVE_COMMIT) type = disk->mirrorJob; path = virDomainDiskGetSource(disk); event = virDomainEventBlockJobNewFromObj(vm, path, type, status); event2 = virDomainEventBlockJob2NewFromObj(vm, disk->dst, type, status); /* If we completed a block pull or commit, then update the XML * to match. */ switch ((virConnectDomainEventBlockJobStatus) status) { case VIR_DOMAIN_BLOCK_JOB_COMPLETED: if (disk->mirrorState == VIR_DOMAIN_DISK_MIRROR_STATE_PIVOT) { if (vm->newDef) { virStorageSourcePtr copy = NULL; if ((persistDisk = virDomainDiskByName(vm->newDef, disk->dst, false))) { copy = virStorageSourceCopy(disk->mirror, false); if (!copy || virStorageSourceInitChainElement(copy, persistDisk->src, true) < 0) { VIR_WARN("Unable to update persistent definition " "on vm %s after block job", vm->def->name); virStorageSourceFree(copy); copy = NULL; persistDisk = NULL; } } if (copy) { virStorageSourceFree(persistDisk->src); persistDisk->src = copy; } } /* XXX We want to revoke security labels as well as audit that * revocation, before dropping the original source. But it gets * tricky if both source and mirror share common backing files (we * want to only revoke the non-shared portion of the chain); so for * now, we leak the access to the original. */ virDomainLockImageDetach(driver->lockManager, vm, disk->src); virStorageSourceFree(disk->src); disk->src = disk->mirror; } else { if (disk->mirror) { virDomainLockImageDetach(driver->lockManager, vm, disk->mirror); virStorageSourceFree(disk->mirror); } } /* Recompute the cached backing chain to match our * updates. Better would be storing the chain ourselves * rather than reprobing, but we haven't quite completed * that conversion to use our XML tracking. */ disk->mirror = NULL; disk->mirrorState = VIR_DOMAIN_DISK_MIRROR_STATE_NONE; disk->mirrorJob = VIR_DOMAIN_BLOCK_JOB_TYPE_UNKNOWN; disk->src->id = 0; ignore_value(qemuDomainDetermineDiskChain(driver, vm, disk, true, true)); ignore_value(qemuBlockNodeNamesDetect(driver, vm, asyncJob)); diskPriv->blockjob = false; break; case VIR_DOMAIN_BLOCK_JOB_READY: disk->mirrorState = VIR_DOMAIN_DISK_MIRROR_STATE_READY; break; case VIR_DOMAIN_BLOCK_JOB_FAILED: case VIR_DOMAIN_BLOCK_JOB_CANCELED: if (disk->mirror) { virDomainLockImageDetach(driver->lockManager, vm, disk->mirror); virStorageSourceFree(disk->mirror); disk->mirror = NULL; } disk->mirrorState = VIR_DOMAIN_DISK_MIRROR_STATE_NONE; disk->mirrorJob = VIR_DOMAIN_BLOCK_JOB_TYPE_UNKNOWN; diskPriv->blockjob = false; break; case VIR_DOMAIN_BLOCK_JOB_LAST: break; } if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm, driver->caps) < 0) VIR_WARN("Unable to save status on vm %s after block job", vm->def->name); if (status == VIR_DOMAIN_BLOCK_JOB_COMPLETED && vm->newDef) { if (virDomainSaveConfig(cfg->configDir, driver->caps, vm->newDef) < 0) VIR_WARN("Unable to update persistent definition on vm %s " "after block job", vm->def->name); } qemuDomainEventQueue(driver, event); qemuDomainEventQueue(driver, event2); virObjectUnref(cfg); }