static void do_drive_backup(const char *job_id, const char *device, const char *target, bool has_format, const char *format, enum MirrorSyncMode sync, bool has_mode, enum NewImageMode mode, bool has_speed, int64_t speed, bool has_bitmap, const char *bitmap, bool has_on_source_error, BlockdevOnError on_source_error, bool has_on_target_error, BlockdevOnError on_target_error, BlockJobTxn *txn, Error **errp) { BlockBackend *blk; BlockDriverState *bs; BlockDriverState *target_bs; BlockDriverState *source = NULL; BdrvDirtyBitmap *bmap = NULL; AioContext *aio_context; QDict *options = NULL; Error *local_err = NULL; int flags; int64_t size; 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; } if (!has_mode) { mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; } blk = blk_by_name(device); if (!blk) { error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, "Device '%s' not found", device); return; } aio_context = blk_get_aio_context(blk); 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 (!blk_is_available(blk)) { error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); goto out; } bs = blk_bs(blk); if (!has_format) { format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : 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 (sync == MIRROR_SYNC_MODE_TOP) { source = backing_bs(bs); if (!source) { sync = MIRROR_SYNC_MODE_FULL; } } if (sync == MIRROR_SYNC_MODE_NONE) { source = bs; } size = bdrv_getlength(bs); if (size < 0) { error_setg_errno(errp, -size, "bdrv_getlength failed"); goto out; } if (mode != NEW_IMAGE_MODE_EXISTING) { assert(format); if (source) { bdrv_img_create(target, format, source->filename, source->drv->format_name, NULL, size, flags, &local_err, false); } else { bdrv_img_create(target, format, NULL, NULL, NULL, size, flags, &local_err, false); } } if (local_err) { error_propagate(errp, local_err); goto out; } if (format) { options = qdict_new(); qdict_put(options, "driver", qstring_from_str(format)); } target_bs = bdrv_open(target, NULL, options, flags, errp); if (!target_bs) { goto out; } bdrv_set_aio_context(target_bs, aio_context); if (has_bitmap) { bmap = bdrv_find_dirty_bitmap(bs, bitmap); if (!bmap) { error_setg(errp, "Bitmap '%s' could not be found", bitmap); bdrv_unref(target_bs); goto out; } } backup_start(job_id, bs, target_bs, speed, sync, bmap, on_source_error, on_target_error, block_job_cb, bs, txn, &local_err); bdrv_unref(target_bs); if (local_err != NULL) { error_propagate(errp, local_err); goto out; } out: aio_context_release(aio_context); }