1 files changed, 25 insertions, 17 deletions

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index b7352bc4c815..e5dc41b10ebb 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -3017,7 +3017,7 @@ xfs_rename(
 	struct xfs_trans	*tp;
 	struct xfs_inode	*wip = NULL;		/* whiteout inode */
 	struct xfs_inode	*inodes[__XFS_SORT_INODES];
-	struct xfs_buf		*agibp;
+	int			i;
 	int			num_inodes = __XFS_SORT_INODES;
 	bool			new_parent = (src_dp != target_dp);
 	bool			src_is_directory = S_ISDIR(VFS_I(src_ip)->i_mode);
@@ -3131,6 +3131,30 @@ xfs_rename(
 	}
 
 	/*
+	 * Lock the AGI buffers we need to handle bumping the nlink of the
+	 * whiteout inode off the unlinked list and to handle dropping the
+	 * nlink of the target inode.  Per locking order rules, do this in
+	 * increasing AG order and before directory block allocation tries to
+	 * grab AGFs because we grab AGIs before AGFs.
+	 *
+	 * The (vfs) caller must ensure that if src is a directory then
+	 * target_ip is either null or an empty directory.
+	 */
+	for (i = 0; i < num_inodes && inodes[i] != NULL; i++) {
+		if (inodes[i] == wip ||
+		    (inodes[i] == target_ip &&
+		     (VFS_I(target_ip)->i_nlink == 1 || src_is_directory))) {
+			struct xfs_buf	*bp;
+			xfs_agnumber_t	agno;
+
+			agno = XFS_INO_TO_AGNO(mp, inodes[i]->i_ino);
+			error = xfs_read_agi(mp, tp, agno, &bp);
+			if (error)
+				goto out_trans_cancel;
+		}
+	}
+
+	/*
 	 * Directory entry creation below may acquire the AGF. Remove
 	 * the whiteout from the unlinked list first to preserve correct
 	 * AGI/AGF locking order. This dirties the transaction so failures
@@ -3182,22 +3206,6 @@ xfs_rename(
 		 * In case there is already an entry with the same
 		 * name at the destination directory, remove it first.
 		 */
-
-		/*
-		 * Check whether the replace operation will need to allocate
-		 * blocks.  This happens when the shortform directory lacks
-		 * space and we have to convert it to a block format directory.
-		 * When more blocks are necessary, we must lock the AGI first
-		 * to preserve locking order (AGI -> AGF).
-		 */
-		if (xfs_dir2_sf_replace_needblock(target_dp, src_ip->i_ino)) {
-			error = xfs_read_agi(mp, tp,
-					XFS_INO_TO_AGNO(mp, target_ip->i_ino),
-					&agibp);
-			if (error)
-				goto out_trans_cancel;
-		}
-
 		error = xfs_dir_replace(tp, target_dp, target_name,
 					src_ip->i_ino, spaceres);
 		if (error)