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

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

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@xxxxxxxxxx>
---
 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);