}
btrfs_wait_ordered_roots(fs_info, U64_MAX, 0, (u64)-1);
- trans = btrfs_start_transaction(root, 0);
- if (IS_ERR(trans)) {
- mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);
- return PTR_ERR(trans);
+ /*
+ * We have to use this loop approach because at this point src_device
+ * has to be available for transaction commit to complete, yet new
+ * chunks shouldn't be allocated on the device.
+ */
+ while (1) {
+ trans = btrfs_start_transaction(root, 0);
+ if (IS_ERR(trans)) {
+ mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);
+ return PTR_ERR(trans);
+ }
+ ret = btrfs_commit_transaction(trans);
+ WARN_ON(ret);
+
+ /* Prevent write_all_supers() during the finishing procedure */
+ mutex_lock(&fs_info->fs_devices->device_list_mutex);
+ /* Prevent new chunks being allocated on the source device */
+ mutex_lock(&fs_info->chunk_mutex);
+
+ if (!list_empty(&src_device->post_commit_list)) {
+ mutex_unlock(&fs_info->fs_devices->device_list_mutex);
+ mutex_unlock(&fs_info->chunk_mutex);
+ } else {
+ break;
+ }
}
- ret = btrfs_commit_transaction(trans);
- WARN_ON(ret);
- /* keep away write_all_supers() during the finishing procedure */
- mutex_lock(&fs_info->fs_devices->device_list_mutex);
- mutex_lock(&fs_info->chunk_mutex);
down_write(&dev_replace->rwsem);
dev_replace->replace_state =
scrub_ret ? BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED
btrfs_device_set_disk_total_bytes(tgt_device,
src_device->disk_total_bytes);
btrfs_device_set_bytes_used(tgt_device, src_device->bytes_used);
- ASSERT(list_empty(&src_device->post_commit_list));
tgt_device->commit_total_bytes = src_device->commit_total_bytes;
tgt_device->commit_bytes_used = src_device->bytes_used;