xfs: set buf types when converting extent formats

Conversion from local to extent format does not set the buffer type
correctly on the new extent buffer when a symlink data is moved out
of line.

Fix the symlink code and leave a comment in the generic bmap code
reminding us that the format-specific data copy needs to set the
destination buffer type appropriately.

cc: <stable@vger.kernel.org> # 3.10 to current
Tested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

2 files changed, 7 insertions, 1 deletions

diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index b5eb4743f75a..4e20fe7497b3 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -973,7 +973,11 @@ xfs_bmap_local_to_extents(
         *firstblock = args.fsbno;
         bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0);
 
-        /* initialise the block and copy the data */
+        /*
+         * Initialise the block and copy the data
+         *
+         * Note: init_fn must set the buffer log item type correctly!
+         */
         init_fn(tp, bp, ip, ifp);
 
         /* account for the change in fork size and log everything */
diff --git a/fs/xfs/libxfs/xfs_symlink_remote.c b/fs/xfs/libxfs/xfs_symlink_remote.c
index c80c5236c3da..e7e26bd6468f 100644
--- a/fs/xfs/libxfs/xfs_symlink_remote.c
+++ b/fs/xfs/libxfs/xfs_symlink_remote.c
@@ -178,6 +178,8 @@ xfs_symlink_local_to_remote(
         struct xfs_mount        *mp = ip->i_mount;
         char                    *buf;
 
+        xfs_trans_buf_set_type(tp, bp, XFS_BLFT_SYMLINK_BUF);
+
         if (!xfs_sb_version_hascrc(&mp->m_sb)) {
                 bp->b_ops = NULL;
                 memcpy(bp->b_addr, ifp->if_u1.if_data, ifp->if_bytes);