[PATCH 49/58] xfs: clear inode reflink flag when freeing blocks

["Darrick J. Wong" <darrick.wong@xxxxxxxxxx>]

Clear the inode reflink flag when freeing or truncating all blocks
in a file.

Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
 fs/xfs/xfs_bmap_util.c |    8 ++++++++
 fs/xfs/xfs_inode.c     |    6 ++++++
 2 files changed, 14 insertions(+)


diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index b054b28..b20d136 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -1338,6 +1338,14 @@ xfs_free_file_space(
                }
 
                /*
+                * Clear the reflink flag if we freed everything.
+                */
+               if (ip->i_d.di_nblocks == 0 && xfs_is_reflink_inode(ip)) {
+                       ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
+                       xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+               }
+
+               /*
                 * complete the transaction
                 */
                error = xfs_bmap_finish(&tp, &free_list, &committed);
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index dc40a6d..61a468b 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1613,6 +1613,12 @@ xfs_itruncate_extents(
        }
 
        /*
+        * Clear the reflink flag if we truncated everything.
+        */
+       if (ip->i_d.di_nblocks == 0 && xfs_is_reflink_inode(ip))
+               ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
+
+       /*
         * Always re-log the inode so that our permanent transaction can keep
         * on rolling it forward in the log.
         */