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Diffstat (limited to 'blockdev.c')
-rw-r--r--blockdev.c224
1 files changed, 100 insertions, 124 deletions
diff --git a/blockdev.c b/blockdev.c
index 553e315..5e85fc0 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -1761,39 +1761,128 @@ typedef struct DriveBackupState {
BlockJob *job;
} DriveBackupState;
-static BlockJob *do_drive_backup(DriveBackup *backup, JobTxn *txn,
- Error **errp);
+static BlockJob *do_backup_common(BackupCommon *backup,
+ BlockDriverState *bs,
+ BlockDriverState *target_bs,
+ AioContext *aio_context,
+ JobTxn *txn, Error **errp);
static void drive_backup_prepare(BlkActionState *common, Error **errp)
{
DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
- BlockDriverState *bs;
DriveBackup *backup;
+ BlockDriverState *bs;
+ BlockDriverState *target_bs;
+ BlockDriverState *source = NULL;
AioContext *aio_context;
+ QDict *options;
Error *local_err = NULL;
+ int flags;
+ int64_t size;
+ bool set_backing_hd = false;
assert(common->action->type == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
backup = common->action->u.drive_backup.data;
+ if (!backup->has_mode) {
+ backup->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
+ }
+
bs = bdrv_lookup_bs(backup->device, backup->device, errp);
if (!bs) {
return;
}
+ if (!bs->drv) {
+ error_setg(errp, "Device has no medium");
+ return;
+ }
+
aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
/* Paired with .clean() */
bdrv_drained_begin(bs);
- state->bs = bs;
+ if (!backup->has_format) {
+ backup->format = backup->mode == NEW_IMAGE_MODE_EXISTING ?
+ NULL : (char *) bs->drv->format_name;
+ }
+
+ /* Early check to avoid creating target */
+ if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
+ goto out;
+ }
+
+ flags = bs->open_flags | BDRV_O_RDWR;
+
+ /*
+ * See if we have a backing HD we can use to create our new image
+ * on top of.
+ */
+ if (backup->sync == MIRROR_SYNC_MODE_TOP) {
+ source = backing_bs(bs);
+ if (!source) {
+ backup->sync = MIRROR_SYNC_MODE_FULL;
+ }
+ }
+ if (backup->sync == MIRROR_SYNC_MODE_NONE) {
+ source = bs;
+ flags |= BDRV_O_NO_BACKING;
+ set_backing_hd = true;
+ }
+
+ size = bdrv_getlength(bs);
+ if (size < 0) {
+ error_setg_errno(errp, -size, "bdrv_getlength failed");
+ goto out;
+ }
+
+ if (backup->mode != NEW_IMAGE_MODE_EXISTING) {
+ assert(backup->format);
+ if (source) {
+ bdrv_refresh_filename(source);
+ bdrv_img_create(backup->target, backup->format, source->filename,
+ source->drv->format_name, NULL,
+ size, flags, false, &local_err);
+ } else {
+ bdrv_img_create(backup->target, backup->format, NULL, NULL, NULL,
+ size, flags, false, &local_err);
+ }
+ }
- state->job = do_drive_backup(backup, common->block_job_txn, &local_err);
if (local_err) {
error_propagate(errp, local_err);
goto out;
}
+ options = qdict_new();
+ qdict_put_str(options, "discard", "unmap");
+ qdict_put_str(options, "detect-zeroes", "unmap");
+ if (backup->format) {
+ qdict_put_str(options, "driver", backup->format);
+ }
+
+ target_bs = bdrv_open(backup->target, NULL, options, flags, errp);
+ if (!target_bs) {
+ goto out;
+ }
+
+ if (set_backing_hd) {
+ bdrv_set_backing_hd(target_bs, source, &local_err);
+ if (local_err) {
+ goto unref;
+ }
+ }
+
+ state->bs = bs;
+
+ state->job = do_backup_common(qapi_DriveBackup_base(backup),
+ bs, target_bs, aio_context,
+ common->block_job_txn, errp);
+
+unref:
+ bdrv_unref(target_bs);
out:
aio_context_release(aio_context);
}
@@ -3587,126 +3676,13 @@ static BlockJob *do_backup_common(BackupCommon *backup,
return job;
}
-static BlockJob *do_drive_backup(DriveBackup *backup, JobTxn *txn,
- Error **errp)
-{
- BlockDriverState *bs;
- BlockDriverState *target_bs;
- BlockDriverState *source = NULL;
- BlockJob *job = NULL;
- AioContext *aio_context;
- QDict *options;
- Error *local_err = NULL;
- int flags;
- int64_t size;
- bool set_backing_hd = false;
-
- if (!backup->has_mode) {
- backup->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
- }
-
- bs = bdrv_lookup_bs(backup->device, backup->device, errp);
- if (!bs) {
- return NULL;
- }
-
- if (!bs->drv) {
- error_setg(errp, "Device has no medium");
- return NULL;
- }
-
- aio_context = bdrv_get_aio_context(bs);
- aio_context_acquire(aio_context);
-
- if (!backup->has_format) {
- backup->format = backup->mode == NEW_IMAGE_MODE_EXISTING ?
- NULL : (char *) bs->drv->format_name;
- }
-
- /* Early check to avoid creating target */
- if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
- goto out;
- }
-
- flags = bs->open_flags | BDRV_O_RDWR;
-
- /*
- * See if we have a backing HD we can use to create our new image
- * on top of.
- */
- if (backup->sync == MIRROR_SYNC_MODE_TOP) {
- source = backing_bs(bs);
- if (!source) {
- backup->sync = MIRROR_SYNC_MODE_FULL;
- }
- }
- if (backup->sync == MIRROR_SYNC_MODE_NONE) {
- source = bs;
- flags |= BDRV_O_NO_BACKING;
- set_backing_hd = true;
- }
-
- size = bdrv_getlength(bs);
- if (size < 0) {
- error_setg_errno(errp, -size, "bdrv_getlength failed");
- goto out;
- }
-
- if (backup->mode != NEW_IMAGE_MODE_EXISTING) {
- assert(backup->format);
- if (source) {
- bdrv_refresh_filename(source);
- bdrv_img_create(backup->target, backup->format, source->filename,
- source->drv->format_name, NULL,
- size, flags, false, &local_err);
- } else {
- bdrv_img_create(backup->target, backup->format, NULL, NULL, NULL,
- size, flags, false, &local_err);
- }
- }
-
- if (local_err) {
- error_propagate(errp, local_err);
- goto out;
- }
-
- options = qdict_new();
- qdict_put_str(options, "discard", "unmap");
- qdict_put_str(options, "detect-zeroes", "unmap");
- if (backup->format) {
- qdict_put_str(options, "driver", backup->format);
- }
-
- target_bs = bdrv_open(backup->target, NULL, options, flags, errp);
- if (!target_bs) {
- goto out;
- }
-
- if (set_backing_hd) {
- bdrv_set_backing_hd(target_bs, source, &local_err);
- if (local_err) {
- goto unref;
- }
- }
-
- job = do_backup_common(qapi_DriveBackup_base(backup),
- bs, target_bs, aio_context, txn, errp);
-
-unref:
- bdrv_unref(target_bs);
-out:
- aio_context_release(aio_context);
- return job;
-}
-
-void qmp_drive_backup(DriveBackup *arg, Error **errp)
+void qmp_drive_backup(DriveBackup *backup, Error **errp)
{
-
- BlockJob *job;
- job = do_drive_backup(arg, NULL, errp);
- if (job) {
- job_start(&job->job);
- }
+ TransactionAction action = {
+ .type = TRANSACTION_ACTION_KIND_DRIVE_BACKUP,
+ .u.drive_backup.data = backup,
+ };
+ blockdev_do_action(&action, errp);
}
BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp)
generated by cgit v1.1 at 2024-12-23 23:47:35 +0000