btrfs: skip log replay on orphaned roots

		wc.replay_dest = btrfs_read_fs_root_no_name(fs_info, &tmp_key);

		if (IS_ERR(wc.replay_dest)) {

			ret = PTR_ERR(wc.replay_dest);

			/*

			 * We didn't find the subvol, likely because it was

			 * deleted.  This is ok, simply skip this log and go to

			 * the next one.

			 *

			 * We need to exclude the root because we can't have

			 * other log replays overwriting this log as we'll read

			 * it back in a few more times.  This will keep our

			 * block from being modified, and we'll just bail for

			 * each subsequent pass.

			 */

			if (ret == -ENOENT)

				ret = btrfs_pin_extent_for_log_replay(fs_info,

							log->node->start,

							log->node->len);

			free_extent_buffer(log->node);

			free_extent_buffer(log->commit_root);

			kfree(log);

			if (!ret)

				goto next;

			btrfs_handle_fs_error(fs_info, ret,

				"Couldn't read target root for tree log recovery.");

			goto error;

						  &root->highest_objectid);

		}

		key.offset = found_key.offset - 1;

		wc.replay_dest->log_root = NULL;

		free_extent_buffer(log->node);

		free_extent_buffer(log->commit_root);

		if (ret)

			goto error;

next:

		if (found_key.offset == 0)

			break;

		key.offset = found_key.offset - 1;

	}

	btrfs_release_path(path);