diff options
Diffstat (limited to 'blockdev.c')
-rw-r--r-- | blockdev.c | 224 |
1 files changed, 100 insertions, 124 deletions
diff --git a/blockdev.c b/blockdev.c index 553e315972..5e85fc042e 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) |