+ /* Can't move across subvolumes, unless it's a subvolume root: */
+ if (src_dir.subvol != dst_dir.subvol &&
+ (!src_inode_u->bi_subvol ||
+ (dst_inum.inum && !dst_inode_u->bi_subvol))) {
+ ret = -EXDEV;
+ goto err;
+ }
+
+ if (src_inode_u->bi_parent_subvol)
+ src_inode_u->bi_parent_subvol = dst_dir.subvol;
+
+ if ((mode == BCH_RENAME_EXCHANGE) &&
+ dst_inode_u->bi_parent_subvol)
+ dst_inode_u->bi_parent_subvol = src_dir.subvol;
+