[PATCH 3.19 012/175] xfs: set buf types when converting extent formats

Greg Kroah-Hartman
2015-03-04T07:11:32Z

From: Dave Chinner <dchinner@redhat.com>

commit fe22d552b82d7cc7de1851233ae8bef579198637 upstream.

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.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
fs/xfs/libxfs/xfs_bmap.c | 6 +++++-
fs/xfs/libxfs/xfs_symlink_remote.c | 2 ++
2 files changed, 7 insertions(+), 1 deletion(-)

--- 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 */
--- 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);