[PATCH 093/119] xfs: swap inode reflink flags when swapping inode extents

Darrick J. Wong
2016-06-17T01:27:59Z

When we're swapping the extents of two inodes, be sure to swap the
reflink inode flag too.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
fs/xfs/xfs_bmap_util.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)

diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index 3d71a17..a5f5515 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -1735,6 +1735,8 @@ xfs_swap_extents(
int taforkblks = 0;
__uint64_t tmp;
int lock_flags;
+ struct xfs_ifork *cowfp;
+ __uint64_t f;

/* XXX: we can't do this with rmap, will fix later */
if (xfs_sb_version_hasrmapbt(&mp->m_sb))
@@ -1948,6 +1950,19 @@ xfs_swap_extents(
break;
}

+ /* Do we have to swap reflink flags? */
+ if ((ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK) ^
+ (tip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK)) {
+ f = ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK;
+ ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
+ ip->i_d.di_flags2 |= tip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK;
+ tip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
+ tip->i_d.di_flags2 |= f & XFS_DIFLAG2_REFLINK;
+ cowfp = ip->i_cowfp;
+ ip->i_cowfp = tip->i_cowfp;
+ tip->i_cowfp = cowfp;
+ }
+
xfs_trans_log_inode(tp, ip, src_log_flags);
xfs_trans_log_inode(tp, tip, target_log_flags);