const char *optstr)
{
QemuOpts *opts;
- char buf[32];
opts = drive_def(optstr);
if (!opts) {
return NULL;
}
if (type != IF_DEFAULT) {
- qemu_opt_set(opts, "if", if_name[type]);
+ qemu_opt_set(opts, "if", if_name[type], &error_abort);
}
if (index >= 0) {
- snprintf(buf, sizeof(buf), "%d", index);
- qemu_opt_set(opts, "index", buf);
+ qemu_opt_set_number(opts, "index", index, &error_abort);
}
if (file)
- qemu_opt_set(opts, "file", file);
+ qemu_opt_set(opts, "file", file, &error_abort);
return opts;
}
ThrottleConfig cfg;
int snapshot = 0;
bool copy_on_read;
- int ret;
Error *error = NULL;
QemuOpts *opts;
const char *id;
bool has_driver_specific_opts;
BlockdevDetectZeroesOptions detect_zeroes;
- BlockDriver *drv = NULL;
/* Check common options by copying from bs_opts to opts, all other options
* stay in bs_opts for processing by bdrv_open(). */
goto early_err;
}
- drv = bdrv_find_format(buf);
- if (!drv) {
- error_setg(errp, "'%s' invalid format", buf);
+ if (qdict_haskey(bs_opts, "driver")) {
+ error_setg(errp, "Cannot specify both 'driver' and 'format'");
goto early_err;
}
+ qdict_put(bs_opts, "driver", qstring_from_str(buf));
}
/* disk I/O throttling */
}
/* init */
- blk = blk_new_with_bs(qemu_opts_id(opts), errp);
- if (!blk) {
- goto early_err;
- }
- bs = blk_bs(blk);
- bs->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
- bs->read_only = ro;
- bs->detect_zeroes = detect_zeroes;
+ if ((!file || !*file) && !has_driver_specific_opts) {
+ blk = blk_new_with_bs(qemu_opts_id(opts), errp);
+ if (!blk) {
+ goto early_err;
+ }
- bdrv_set_on_error(bs, on_read_error, on_write_error);
+ bs = blk_bs(blk);
+ bs->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
+ bs->read_only = ro;
- /* disk I/O throttling */
- if (throttle_enabled(&cfg)) {
- bdrv_io_limits_enable(bs);
- bdrv_set_io_limits(bs, &cfg);
- }
-
- if (!file || !*file) {
- if (has_driver_specific_opts) {
+ QDECREF(bs_opts);
+ } else {
+ if (file && !*file) {
file = NULL;
- } else {
- QDECREF(bs_opts);
- qemu_opts_del(opts);
- return blk;
}
- }
- if (snapshot) {
- /* always use cache=unsafe with snapshot */
- bdrv_flags &= ~BDRV_O_CACHE_MASK;
- bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
- }
- if (copy_on_read) {
- bdrv_flags |= BDRV_O_COPY_ON_READ;
- }
+ if (snapshot) {
+ /* always use cache=unsafe with snapshot */
+ bdrv_flags &= ~BDRV_O_CACHE_MASK;
+ bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
+ }
- if (runstate_check(RUN_STATE_INMIGRATE)) {
- bdrv_flags |= BDRV_O_INCOMING;
+ if (copy_on_read) {
+ bdrv_flags |= BDRV_O_COPY_ON_READ;
+ }
+
+ if (runstate_check(RUN_STATE_INMIGRATE)) {
+ bdrv_flags |= BDRV_O_INCOMING;
+ }
+
+ bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
+
+ blk = blk_new_open(qemu_opts_id(opts), file, NULL, bs_opts, bdrv_flags,
+ errp);
+ if (!blk) {
+ goto err_no_bs_opts;
+ }
+ bs = blk_bs(blk);
}
- bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
+ bs->detect_zeroes = detect_zeroes;
- QINCREF(bs_opts);
- ret = bdrv_open(&bs, file, NULL, bs_opts, bdrv_flags, drv, &error);
- assert(bs == blk_bs(blk));
+ bdrv_set_on_error(bs, on_read_error, on_write_error);
- if (ret < 0) {
- error_setg(errp, "could not open disk image %s: %s",
- file ?: blk_name(blk), error_get_pretty(error));
- error_free(error);
- goto err;
+ /* disk I/O throttling */
+ if (throttle_enabled(&cfg)) {
+ bdrv_io_limits_enable(bs);
+ bdrv_set_io_limits(bs, &cfg);
}
if (bdrv_key_required(bs)) {
autostart = 0;
}
- QDECREF(bs_opts);
+err_no_bs_opts:
qemu_opts_del(opts);
-
return blk;
-err:
- blk_unref(blk);
early_err:
qemu_opts_del(opts);
err_no_opts:
/* rename all items in opts */
while ((value = qemu_opt_get(opts, from))) {
- qemu_opt_set(opts, to, value);
+ qemu_opt_set(opts, to, value, &error_abort);
qemu_opt_unset(opts, from);
}
}
qemu_opt_rename(all_opts, opt_renames[i].from, opt_renames[i].to,
&local_err);
if (local_err) {
- error_report("%s", error_get_pretty(local_err));
- error_free(local_err);
+ error_report_err(local_err);
return NULL;
}
}
/* Specific options take precedence */
if (!qemu_opt_get(all_opts, "cache.writeback")) {
qemu_opt_set_bool(all_opts, "cache.writeback",
- !!(flags & BDRV_O_CACHE_WB));
+ !!(flags & BDRV_O_CACHE_WB), &error_abort);
}
if (!qemu_opt_get(all_opts, "cache.direct")) {
qemu_opt_set_bool(all_opts, "cache.direct",
- !!(flags & BDRV_O_NOCACHE));
+ !!(flags & BDRV_O_NOCACHE), &error_abort);
}
if (!qemu_opt_get(all_opts, "cache.no-flush")) {
qemu_opt_set_bool(all_opts, "cache.no-flush",
- !!(flags & BDRV_O_NO_FLUSH));
+ !!(flags & BDRV_O_NO_FLUSH), &error_abort);
}
qemu_opt_unset(all_opts, "cache");
}
&error_abort);
qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err);
if (local_err) {
- error_report("%s", error_get_pretty(local_err));
- error_free(local_err);
+ error_report_err(local_err);
goto fail;
}
devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
&error_abort);
if (arch_type == QEMU_ARCH_S390X) {
- qemu_opt_set(devopts, "driver", "virtio-blk-s390");
+ qemu_opt_set(devopts, "driver", "virtio-blk-s390", &error_abort);
} else {
- qemu_opt_set(devopts, "driver", "virtio-blk-pci");
+ qemu_opt_set(devopts, "driver", "virtio-blk-pci", &error_abort);
}
- qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"));
+ qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"),
+ &error_abort);
if (devaddr) {
- qemu_opt_set(devopts, "addr", devaddr);
+ qemu_opt_set(devopts, "addr", devaddr, &error_abort);
}
}
bs_opts = NULL;
if (!blk) {
if (local_err) {
- error_report("%s", error_get_pretty(local_err));
- error_free(local_err);
+ error_report_err(local_err);
}
goto fail;
} else {
return dinfo;
}
-void do_commit(Monitor *mon, const QDict *qdict)
+void hmp_commit(Monitor *mon, const QDict *qdict)
{
const char *device = qdict_get_str(qdict, "device");
- BlockDriverState *bs;
+ BlockBackend *blk;
int ret;
if (!strcmp(device, "all")) {
ret = bdrv_commit_all();
} else {
- bs = bdrv_find(device);
- if (!bs) {
+ blk = blk_by_name(device);
+ if (!blk) {
monitor_printf(mon, "Device '%s' not found\n", device);
return;
}
- ret = bdrv_commit(bs);
+ ret = bdrv_commit(blk_bs(blk));
}
if (ret < 0) {
monitor_printf(mon, "'commit' error for '%s': %s\n", device,
const char *name,
Error **errp)
{
- BlockDriverState *bs = bdrv_find(device);
+ BlockDriverState *bs;
+ BlockBackend *blk;
+ AioContext *aio_context;
QEMUSnapshotInfo sn;
Error *local_err = NULL;
SnapshotInfo *info = NULL;
int ret;
- if (!bs) {
+ blk = blk_by_name(device);
+ if (!blk) {
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
return NULL;
}
+ bs = blk_bs(blk);
if (!has_id) {
id = NULL;
return NULL;
}
+ aio_context = bdrv_get_aio_context(bs);
+ aio_context_acquire(aio_context);
+
+ if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, errp)) {
+ goto out_aio_context;
+ }
+
ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err);
if (local_err) {
error_propagate(errp, local_err);
- return NULL;
+ goto out_aio_context;
}
if (!ret) {
error_setg(errp,
"Snapshot with id '%s' and name '%s' does not exist on "
"device '%s'",
STR_OR_NULL(id), STR_OR_NULL(name), device);
- return NULL;
+ goto out_aio_context;
}
bdrv_snapshot_delete(bs, id, name, &local_err);
if (local_err) {
error_propagate(errp, local_err);
- return NULL;
+ goto out_aio_context;
}
+ aio_context_release(aio_context);
+
info = g_new0(SnapshotInfo, 1);
info->id = g_strdup(sn.id_str);
info->name = g_strdup(sn.name);
info->vm_clock_sec = sn.vm_clock_nsec / 1000000000;
return info;
+
+out_aio_context:
+ aio_context_release(aio_context);
+ return NULL;
}
-/* New and old BlockDriverState structs for group snapshots */
+/* New and old BlockDriverState structs for atomic group operations */
typedef struct BlkTransactionState BlkTransactionState;
typedef struct InternalSnapshotState {
BlkTransactionState common;
BlockDriverState *bs;
+ AioContext *aio_context;
QEMUSnapshotInfo sn;
} InternalSnapshotState;
Error *local_err = NULL;
const char *device;
const char *name;
+ BlockBackend *blk;
BlockDriverState *bs;
QEMUSnapshotInfo old_sn, *sn;
bool ret;
name = internal->name;
/* 2. check for validation */
- bs = bdrv_find(device);
- if (!bs) {
+ blk = blk_by_name(device);
+ if (!blk) {
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
return;
}
+ bs = blk_bs(blk);
+
+ /* AioContext is released in .clean() */
+ state->aio_context = bdrv_get_aio_context(bs);
+ aio_context_acquire(state->aio_context);
if (!bdrv_is_inserted(bs)) {
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
return;
}
+ if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, errp)) {
+ return;
+ }
+
if (bdrv_is_read_only(bs)) {
error_set(errp, QERR_DEVICE_IS_READ_ONLY, device);
return;
}
}
+static void internal_snapshot_clean(BlkTransactionState *common)
+{
+ InternalSnapshotState *state = DO_UPCAST(InternalSnapshotState,
+ common, common);
+
+ if (state->aio_context) {
+ aio_context_release(state->aio_context);
+ }
+}
+
/* external snapshot private data */
typedef struct ExternalSnapshotState {
BlkTransactionState common;
BlockDriverState *old_bs;
BlockDriverState *new_bs;
+ AioContext *aio_context;
} ExternalSnapshotState;
static void external_snapshot_prepare(BlkTransactionState *common,
return;
}
+ /* Acquire AioContext now so any threads operating on old_bs stop */
+ state->aio_context = bdrv_get_aio_context(state->old_bs);
+ aio_context_acquire(state->aio_context);
+
if (!bdrv_is_inserted(state->old_bs)) {
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
return;
ExternalSnapshotState *state =
DO_UPCAST(ExternalSnapshotState, common, common);
+ bdrv_set_aio_context(state->new_bs, state->aio_context);
+
/* This removes our old bs and adds the new bs */
bdrv_append(state->new_bs, state->old_bs);
/* We don't need (or want) to use the transactional
* don't want to abort all of them if one of them fails the reopen */
bdrv_reopen(state->new_bs, state->new_bs->open_flags & ~BDRV_O_RDWR,
NULL);
+
+ aio_context_release(state->aio_context);
}
static void external_snapshot_abort(BlkTransactionState *common)
if (state->new_bs) {
bdrv_unref(state->new_bs);
}
+ if (state->aio_context) {
+ aio_context_release(state->aio_context);
+ }
}
typedef struct DriveBackupState {
BlkTransactionState common;
BlockDriverState *bs;
+ AioContext *aio_context;
BlockJob *job;
} DriveBackupState;
static void drive_backup_prepare(BlkTransactionState *common, Error **errp)
{
DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
+ BlockDriverState *bs;
+ BlockBackend *blk;
DriveBackup *backup;
Error *local_err = NULL;
assert(common->action->kind == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
backup = common->action->drive_backup;
+ blk = blk_by_name(backup->device);
+ if (!blk) {
+ error_set(errp, QERR_DEVICE_NOT_FOUND, backup->device);
+ return;
+ }
+ bs = blk_bs(blk);
+
+ /* AioContext is released in .clean() */
+ state->aio_context = bdrv_get_aio_context(bs);
+ aio_context_acquire(state->aio_context);
+
qmp_drive_backup(backup->device, backup->target,
backup->has_format, backup->format,
backup->sync,
&local_err);
if (local_err) {
error_propagate(errp, local_err);
- state->bs = NULL;
- state->job = NULL;
return;
}
- state->bs = bdrv_find(backup->device);
+ state->bs = bs;
state->job = state->bs->job;
}
}
}
+static void drive_backup_clean(BlkTransactionState *common)
+{
+ DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
+
+ if (state->aio_context) {
+ aio_context_release(state->aio_context);
+ }
+}
+
+typedef struct BlockdevBackupState {
+ BlkTransactionState common;
+ BlockDriverState *bs;
+ BlockJob *job;
+ AioContext *aio_context;
+} BlockdevBackupState;
+
+static void blockdev_backup_prepare(BlkTransactionState *common, Error **errp)
+{
+ BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
+ BlockdevBackup *backup;
+ BlockDriverState *bs, *target;
+ BlockBackend *blk;
+ Error *local_err = NULL;
+
+ assert(common->action->kind == TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP);
+ backup = common->action->blockdev_backup;
+
+ blk = blk_by_name(backup->device);
+ if (!blk) {
+ error_setg(errp, "Device '%s' not found", backup->device);
+ return;
+ }
+ bs = blk_bs(blk);
+
+ blk = blk_by_name(backup->target);
+ if (!blk) {
+ error_setg(errp, "Device '%s' not found", backup->target);
+ return;
+ }
+ target = blk_bs(blk);
+
+ /* AioContext is released in .clean() */
+ state->aio_context = bdrv_get_aio_context(bs);
+ if (state->aio_context != bdrv_get_aio_context(target)) {
+ state->aio_context = NULL;
+ error_setg(errp, "Backup between two IO threads is not implemented");
+ return;
+ }
+ aio_context_acquire(state->aio_context);
+
+ qmp_blockdev_backup(backup->device, backup->target,
+ backup->sync,
+ backup->has_speed, backup->speed,
+ backup->has_on_source_error, backup->on_source_error,
+ backup->has_on_target_error, backup->on_target_error,
+ &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+
+ state->bs = bs;
+ state->job = state->bs->job;
+}
+
+static void blockdev_backup_abort(BlkTransactionState *common)
+{
+ BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
+ BlockDriverState *bs = state->bs;
+
+ /* Only cancel if it's the job we started */
+ if (bs && bs->job && bs->job == state->job) {
+ block_job_cancel_sync(bs->job);
+ }
+}
+
+static void blockdev_backup_clean(BlkTransactionState *common)
+{
+ BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
+
+ if (state->aio_context) {
+ aio_context_release(state->aio_context);
+ }
+}
+
static void abort_prepare(BlkTransactionState *common, Error **errp)
{
error_setg(errp, "Transaction aborted using Abort action");
.instance_size = sizeof(DriveBackupState),
.prepare = drive_backup_prepare,
.abort = drive_backup_abort,
+ .clean = drive_backup_clean,
+ },
+ [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP] = {
+ .instance_size = sizeof(BlockdevBackupState),
+ .prepare = blockdev_backup_prepare,
+ .abort = blockdev_backup_abort,
+ .clean = blockdev_backup_clean,
},
[TRANSACTION_ACTION_KIND_ABORT] = {
.instance_size = sizeof(BlkTransactionState),
.instance_size = sizeof(InternalSnapshotState),
.prepare = internal_snapshot_prepare,
.abort = internal_snapshot_abort,
+ .clean = internal_snapshot_clean,
},
};
/*
- * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
- * then we do not pivot any of the devices in the group, and abandon the
- * snapshots
+ * 'Atomic' group operations. The operations are performed as a set, and if
+ * any fail then we roll back all operations in the group.
*/
void qmp_transaction(TransactionActionList *dev_list, Error **errp)
{
QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionState) snap_bdrv_states;
QSIMPLEQ_INIT(&snap_bdrv_states);
- /* drain all i/o before any snapshots */
+ /* drain all i/o before any operations */
bdrv_drain_all();
- /* We don't do anything in this loop that commits us to the snapshot */
+ /* We don't do anything in this loop that commits us to the operations */
while (NULL != dev_entry) {
TransactionAction *dev_info = NULL;
const BdrvActionOps *ops;
goto exit;
delete_and_fail:
- /*
- * failure, and it is all-or-none; abandon each new bs, and keep using
- * the original bs for all images
- */
+ /* failure, and it is all-or-none; roll back all operations */
QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
if (state->ops->abort) {
state->ops->abort(state);
static void eject_device(BlockBackend *blk, int force, Error **errp)
{
BlockDriverState *bs = blk_bs(blk);
+ AioContext *aio_context;
+
+ aio_context = bdrv_get_aio_context(bs);
+ aio_context_acquire(aio_context);
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_EJECT, errp)) {
- return;
+ goto out;
}
if (!blk_dev_has_removable_media(blk)) {
error_setg(errp, "Device '%s' is not removable",
bdrv_get_device_name(bs));
- return;
+ goto out;
}
if (blk_dev_is_medium_locked(blk) && !blk_dev_is_tray_open(blk)) {
if (!force) {
error_setg(errp, "Device '%s' is locked",
bdrv_get_device_name(bs));
- return;
+ goto out;
}
}
bdrv_close(bs);
+
+out:
+ aio_context_release(aio_context);
}
void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
{
Error *local_err = NULL;
BlockDriverState *bs;
- int err;
+ AioContext *aio_context;
bs = bdrv_lookup_bs(has_device ? device : NULL,
has_node_name ? node_name : NULL,
return;
}
- err = bdrv_set_key(bs, password);
- if (err == -EINVAL) {
- error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
- return;
- } else if (err < 0) {
- error_set(errp, QERR_INVALID_PASSWORD);
- return;
- }
+ aio_context = bdrv_get_aio_context(bs);
+ aio_context_acquire(aio_context);
+
+ bdrv_add_key(bs, password, errp);
+
+ aio_context_release(aio_context);
}
+/* Assumes AioContext is held */
static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename,
int bdrv_flags, BlockDriver *drv,
const char *password, Error **errp)
return;
}
- if (bdrv_key_required(bs)) {
- if (password) {
- if (bdrv_set_key(bs, password) < 0) {
- error_set(errp, QERR_INVALID_PASSWORD);
- }
- } else {
- error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs),
- bdrv_get_encrypted_filename(bs));
- }
- } else if (password) {
- error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
- }
+ bdrv_add_key(bs, password, errp);
}
void qmp_change_blockdev(const char *device, const char *filename,
{
BlockBackend *blk;
BlockDriverState *bs;
+ AioContext *aio_context;
BlockDriver *drv = NULL;
int bdrv_flags;
Error *err = NULL;
}
bs = blk_bs(blk);
+ aio_context = bdrv_get_aio_context(bs);
+ aio_context_acquire(aio_context);
+
if (format) {
drv = bdrv_find_whitelisted_format(format, bs->read_only);
if (!drv) {
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
- return;
+ goto out;
}
}
eject_device(blk, 0, &err);
if (err) {
error_propagate(errp, err);
- return;
+ goto out;
}
bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
+
+out:
+ aio_context_release(aio_context);
}
/* throttling disk I/O limits */
{
ThrottleConfig cfg;
BlockDriverState *bs;
+ BlockBackend *blk;
AioContext *aio_context;
- bs = bdrv_find(device);
- if (!bs) {
+ blk = blk_by_name(device);
+ if (!blk) {
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
return;
}
+ bs = blk_bs(blk);
memset(&cfg, 0, sizeof(cfg));
cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps;
aio_context_release(aio_context);
}
-int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
+int hmp_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
{
const char *id = qdict_get_str(qdict, "id");
BlockBackend *blk;
aio_context_acquire(aio_context);
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) {
- error_report("%s", error_get_pretty(local_err));
- error_free(local_err);
+ error_report_err(local_err);
aio_context_release(aio_context);
return -1;
}
* then we can just get rid of the block driver state right here.
*/
if (blk_get_attached_dev(blk)) {
- blk_hide_on_behalf_of_do_drive_del(blk);
+ blk_hide_on_behalf_of_hmp_drive_del(blk);
/* Further I/O must not pause the guest */
bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT,
BLOCKDEV_ON_ERROR_REPORT);
bool has_on_error, BlockdevOnError on_error,
Error **errp)
{
+ BlockBackend *blk;
BlockDriverState *bs;
BlockDriverState *base_bs = NULL;
+ AioContext *aio_context;
Error *local_err = NULL;
const char *base_name = NULL;
on_error = BLOCKDEV_ON_ERROR_REPORT;
}
- bs = bdrv_find(device);
- if (!bs) {
+ blk = blk_by_name(device);
+ if (!blk) {
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
return;
}
+ bs = blk_bs(blk);
+
+ aio_context = bdrv_get_aio_context(bs);
+ aio_context_acquire(aio_context);
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_STREAM, errp)) {
- return;
+ goto out;
}
if (has_base) {
base_bs = bdrv_find_backing_image(bs, base);
if (base_bs == NULL) {
error_set(errp, QERR_BASE_NOT_FOUND, base);
- return;
+ goto out;
}
+ assert(bdrv_get_aio_context(base_bs) == aio_context);
base_name = base;
}
if (base_bs == NULL && has_backing_file) {
error_setg(errp, "backing file specified, but streaming the "
"entire chain");
- return;
+ goto out;
}
/* backing_file string overrides base bs filename */
on_error, block_job_cb, bs, &local_err);
if (local_err) {
error_propagate(errp, local_err);
- return;
+ goto out;
}
trace_qmp_block_stream(bs, bs->job);
+
+out:
+ aio_context_release(aio_context);
}
void qmp_block_commit(const char *device,
bool has_speed, int64_t speed,
Error **errp)
{
+ BlockBackend *blk;
BlockDriverState *bs;
BlockDriverState *base_bs, *top_bs;
+ AioContext *aio_context;
Error *local_err = NULL;
/* This will be part of the QMP command, if/when the
* BlockdevOnError change for blkmirror makes it in
speed = 0;
}
- /* drain all i/o before commits */
- bdrv_drain_all();
-
/* Important Note:
* libvirt relies on the DeviceNotFound error class in order to probe for
* live commit feature versions; for this to work, we must make sure to
* perform the device lookup before any generic errors that may occur in a
* scenario in which all optional arguments are omitted. */
- bs = bdrv_find(device);
- if (!bs) {
+ blk = blk_by_name(device);
+ if (!blk) {
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
return;
}
+ bs = blk_bs(blk);
- if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT, errp)) {
- return;
+ aio_context = bdrv_get_aio_context(bs);
+ aio_context_acquire(aio_context);
+
+ /* drain all i/o before commits */
+ bdrv_drain_all();
+
+ if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, errp)) {
+ goto out;
}
/* default top_bs is the active layer */
if (top_bs == NULL) {
error_setg(errp, "Top image file %s not found", top ? top : "NULL");
- return;
+ goto out;
}
+ assert(bdrv_get_aio_context(top_bs) == aio_context);
+
if (has_base && base) {
base_bs = bdrv_find_backing_image(top_bs, base);
} else {
if (base_bs == NULL) {
error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
- return;
+ goto out;
+ }
+
+ assert(bdrv_get_aio_context(base_bs) == aio_context);
+
+ if (bdrv_op_is_blocked(base_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
+ goto out;
}
/* Do not allow attempts to commit an image into itself */
if (top_bs == base_bs) {
error_setg(errp, "cannot commit an image into itself");
- return;
+ goto out;
}
if (top_bs == bs) {
if (has_backing_file) {
error_setg(errp, "'backing-file' specified,"
" but 'top' is the active layer");
- return;
+ goto out;
}
commit_active_start(bs, base_bs, speed, on_error, block_job_cb,
bs, &local_err);
}
if (local_err != NULL) {
error_propagate(errp, local_err);
- return;
+ goto out;
}
+
+out:
+ aio_context_release(aio_context);
}
void qmp_drive_backup(const char *device, const char *target,
bool has_on_target_error, BlockdevOnError on_target_error,
Error **errp)
{
+ BlockBackend *blk;
BlockDriverState *bs;
BlockDriverState *target_bs;
BlockDriverState *source = NULL;
+ AioContext *aio_context;
BlockDriver *drv = NULL;
Error *local_err = NULL;
int flags;
mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
}
- bs = bdrv_find(device);
- if (!bs) {
+ blk = blk_by_name(device);
+ if (!blk) {
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
return;
}
+ bs = blk_bs(blk);
+
+ aio_context = bdrv_get_aio_context(bs);
+ aio_context_acquire(aio_context);
+ /* Although backup_run has this check too, we need to use bs->drv below, so
+ * do an early check redundantly. */
if (!bdrv_is_inserted(bs)) {
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
- return;
+ goto out;
}
if (!has_format) {
drv = bdrv_find_format(format);
if (!drv) {
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
- return;
+ goto out;
}
}
+ /* Early check to avoid creating target */
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
- return;
+ goto out;
}
flags = bs->open_flags | BDRV_O_RDWR;
size = bdrv_getlength(bs);
if (size < 0) {
error_setg_errno(errp, -size, "bdrv_getlength failed");
- return;
+ goto out;
}
if (mode != NEW_IMAGE_MODE_EXISTING) {
if (local_err) {
error_propagate(errp, local_err);
- return;
+ goto out;
}
target_bs = NULL;
ret = bdrv_open(&target_bs, target, NULL, NULL, flags, drv, &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
- return;
+ goto out;
}
+ bdrv_set_aio_context(target_bs, aio_context);
+
backup_start(bs, target_bs, speed, sync, on_source_error, on_target_error,
block_job_cb, bs, &local_err);
if (local_err != NULL) {
bdrv_unref(target_bs);
error_propagate(errp, local_err);
- return;
+ goto out;
}
+
+out:
+ aio_context_release(aio_context);
}
BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp)
return bdrv_named_nodes_list();
}
+void qmp_blockdev_backup(const char *device, const char *target,
+ enum MirrorSyncMode sync,
+ bool has_speed, int64_t speed,
+ bool has_on_source_error,
+ BlockdevOnError on_source_error,
+ bool has_on_target_error,
+ BlockdevOnError on_target_error,
+ Error **errp)
+{
+ BlockBackend *blk;
+ BlockDriverState *bs;
+ BlockDriverState *target_bs;
+ Error *local_err = NULL;
+ AioContext *aio_context;
+
+ if (!has_speed) {
+ speed = 0;
+ }
+ if (!has_on_source_error) {
+ on_source_error = BLOCKDEV_ON_ERROR_REPORT;
+ }
+ if (!has_on_target_error) {
+ on_target_error = BLOCKDEV_ON_ERROR_REPORT;
+ }
+
+ blk = blk_by_name(device);
+ if (!blk) {
+ error_setg(errp, "Device '%s' not found", device);
+ return;
+ }
+ bs = blk_bs(blk);
+
+ aio_context = bdrv_get_aio_context(bs);
+ aio_context_acquire(aio_context);
+
+ blk = blk_by_name(target);
+ if (!blk) {
+ error_setg(errp, "Device '%s' not found", target);
+ goto out;
+ }
+ target_bs = blk_bs(blk);
+
+ bdrv_ref(target_bs);
+ bdrv_set_aio_context(target_bs, aio_context);
+ backup_start(bs, target_bs, speed, sync, on_source_error, on_target_error,
+ block_job_cb, bs, &local_err);
+ if (local_err != NULL) {
+ bdrv_unref(target_bs);
+ error_propagate(errp, local_err);
+ }
+out:
+ aio_context_release(aio_context);
+}
+
#define DEFAULT_MIRROR_BUF_SIZE (10 << 20)
void qmp_drive_mirror(const char *device, const char *target,
bool has_on_target_error, BlockdevOnError on_target_error,
Error **errp)
{
+ BlockBackend *blk;
BlockDriverState *bs;
BlockDriverState *source, *target_bs;
+ AioContext *aio_context;
BlockDriver *drv = NULL;
Error *local_err = NULL;
QDict *options = NULL;
return;
}
- bs = bdrv_find(device);
- if (!bs) {
+ blk = blk_by_name(device);
+ if (!blk) {
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
return;
}
+ bs = blk_bs(blk);
+
+ aio_context = bdrv_get_aio_context(bs);
+ aio_context_acquire(aio_context);
if (!bdrv_is_inserted(bs)) {
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
- return;
+ goto out;
}
if (!has_format) {
drv = bdrv_find_format(format);
if (!drv) {
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
- return;
+ goto out;
}
}
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR, errp)) {
- return;
+ goto out;
}
flags = bs->open_flags | BDRV_O_RDWR;
size = bdrv_getlength(bs);
if (size < 0) {
error_setg_errno(errp, -size, "bdrv_getlength failed");
- return;
+ goto out;
}
if (has_replaces) {
BlockDriverState *to_replace_bs;
+ AioContext *replace_aio_context;
+ int64_t replace_size;
if (!has_node_name) {
error_setg(errp, "a node-name must be provided when replacing a"
" named node of the graph");
- return;
+ goto out;
}
to_replace_bs = check_to_replace_node(replaces, &local_err);
if (!to_replace_bs) {
error_propagate(errp, local_err);
- return;
+ goto out;
}
- if (size != bdrv_getlength(to_replace_bs)) {
+ replace_aio_context = bdrv_get_aio_context(to_replace_bs);
+ aio_context_acquire(replace_aio_context);
+ replace_size = bdrv_getlength(to_replace_bs);
+ aio_context_release(replace_aio_context);
+
+ if (size != replace_size) {
error_setg(errp, "cannot replace image with a mirror image of "
"different size");
- return;
+ goto out;
}
}
if (local_err) {
error_propagate(errp, local_err);
- return;
+ goto out;
}
if (has_node_name) {
flags | BDRV_O_NO_BACKING, drv, &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
- return;
+ goto out;
}
+ bdrv_set_aio_context(target_bs, aio_context);
+
/* pass the node name to replace to mirror start since it's loose coupling
* and will allow to check whether the node still exist at mirror completion
*/
if (local_err != NULL) {
bdrv_unref(target_bs);
error_propagate(errp, local_err);
- return;
+ goto out;
}
+
+out:
+ aio_context_release(aio_context);
}
/* Get the block job for a given device name and acquire its AioContext */
-static BlockJob *find_block_job(const char *device, AioContext **aio_context)
+static BlockJob *find_block_job(const char *device, AioContext **aio_context,
+ Error **errp)
{
+ BlockBackend *blk;
BlockDriverState *bs;
- bs = bdrv_find(device);
- if (!bs) {
+ blk = blk_by_name(device);
+ if (!blk) {
goto notfound;
}
+ bs = blk_bs(blk);
*aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(*aio_context);
return bs->job;
notfound:
+ error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE,
+ "No active block job on device '%s'", device);
*aio_context = NULL;
return NULL;
}
void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
{
AioContext *aio_context;
- BlockJob *job = find_block_job(device, &aio_context);
+ BlockJob *job = find_block_job(device, &aio_context, errp);
if (!job) {
- error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
return;
}
bool has_force, bool force, Error **errp)
{
AioContext *aio_context;
- BlockJob *job = find_block_job(device, &aio_context);
+ BlockJob *job = find_block_job(device, &aio_context, errp);
if (!job) {
- error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
return;
}
force = false;
}
- if (job->paused && !force) {
+ if (job->user_paused && !force) {
error_setg(errp, "The block job for device '%s' is currently paused",
device);
goto out;
void qmp_block_job_pause(const char *device, Error **errp)
{
AioContext *aio_context;
- BlockJob *job = find_block_job(device, &aio_context);
+ BlockJob *job = find_block_job(device, &aio_context, errp);
- if (!job) {
- error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
+ if (!job || job->user_paused) {
return;
}
+ job->user_paused = true;
trace_qmp_block_job_pause(job);
block_job_pause(job);
aio_context_release(aio_context);
void qmp_block_job_resume(const char *device, Error **errp)
{
AioContext *aio_context;
- BlockJob *job = find_block_job(device, &aio_context);
+ BlockJob *job = find_block_job(device, &aio_context, errp);
- if (!job) {
- error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
+ if (!job || !job->user_paused) {
return;
}
+ job->user_paused = false;
trace_qmp_block_job_resume(job);
block_job_resume(job);
aio_context_release(aio_context);
void qmp_block_job_complete(const char *device, Error **errp)
{
AioContext *aio_context;
- BlockJob *job = find_block_job(device, &aio_context);
+ BlockJob *job = find_block_job(device, &aio_context, errp);
if (!job) {
- error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
return;
}
const char *backing_file,
Error **errp)
{
+ BlockBackend *blk;
BlockDriverState *bs = NULL;
+ AioContext *aio_context;
BlockDriverState *image_bs = NULL;
Error *local_err = NULL;
bool ro;
int open_flags;
int ret;
- /* find the top layer BDS of the chain */
- bs = bdrv_find(device);
- if (!bs) {
+ blk = blk_by_name(device);
+ if (!blk) {
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
return;
}
+ bs = blk_bs(blk);
+
+ aio_context = bdrv_get_aio_context(bs);
+ aio_context_acquire(aio_context);
image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err);
if (local_err) {
error_propagate(errp, local_err);
- return;
+ goto out;
}
if (!image_bs) {
error_setg(errp, "image file not found");
- return;
+ goto out;
}
if (bdrv_find_base(image_bs) == image_bs) {
error_setg(errp, "not allowing backing file change on an image "
"without a backing file");
- return;
+ goto out;
}
/* even though we are not necessarily operating on bs, we need it to
* determine if block ops are currently prohibited on the chain */
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) {
- return;
+ goto out;
}
/* final sanity check */
if (!bdrv_chain_contains(bs, image_bs)) {
error_setg(errp, "'%s' and image file are not in the same chain",
device);
- return;
+ goto out;
}
/* if not r/w, reopen to make r/w */
bdrv_reopen(image_bs, open_flags | BDRV_O_RDWR, &local_err);
if (local_err) {
error_propagate(errp, local_err);
- return;
+ goto out;
}
}
error_propagate(errp, local_err); /* will preserve prior errp */
}
}
+
+out:
+ aio_context_release(aio_context);
}
void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
projects / qemu.git / blobdiff