xfs: don't allow reflink + realtime filesystems

We don't support realtime filesystems with reflink either, so fail
those mounts.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Bill O'Donnell <billodo@redhat.com>

diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 0505605..96388fb 100644 (file)
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1684,6 +1684,13 @@ xfs_fs_fill_super(
                }
        }
 
+       if (xfs_sb_version_hasreflink(&mp->m_sb) && mp->m_sb.sb_rblocks) {
+               xfs_alert(mp,
+       "reflink not compatible with realtime device!");
+               error = -EINVAL;
+               goto out_filestream_unmount;
+       }
+
        if (xfs_sb_version_hasrmapbt(&mp->m_sb)) {
                if (mp->m_sb.sb_rblocks) {
                        xfs_alert(mp,