Merge tag 'xfs-4.16-merge-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull more xfs updates from Darrick Wong:
 "As promised, here's a (much smaller) second pull request for the
  second week of the merge cycle. This time around we have a couple
  patches shutting off unsupported fs configurations, and a couple of
  cleanups.

  Last, we turn off EXPERIMENTAL for the reverse mapping btree, since
  the primary downstream user of that information (online fsck) is now
  upstream and I haven't seen any major failures in a few kernel
  releases.

  Summary:

   - Print scrub build status in the xfs build info.

   - Explicitly call out the remaining two scenarios where we don't
     support reflink and never have.

   - Remove EXPERIMENTAL tag from reverse mapping btree!"

* tag 'xfs-4.16-merge-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: remove experimental tag for reverse mapping
  xfs: don't allow reflink + realtime filesystems
  xfs: don't allow DAX on reflink filesystems
  xfs: add scrub to XFS_BUILD_OPTIONS
  xfs: fix u32 type usage in sb validation function

1 files changed, 15 insertions, 9 deletions

diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index f3e0001f9992..7aba628dc527 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1666,9 +1666,12 @@ xfs_fs_fill_super(
 			"DAX unsupported by block device. Turning off DAX.");
 			mp->m_flags &= ~XFS_MOUNT_DAX;
 		}
-		if (xfs_sb_version_hasreflink(&mp->m_sb))
+		if (xfs_sb_version_hasreflink(&mp->m_sb)) {
 			xfs_alert(mp,
 		"DAX and reflink cannot be used together!");
+			error = -EINVAL;
+			goto out_filestream_unmount;
+		}
 	}
 
 	if (mp->m_flags & XFS_MOUNT_DISCARD) {
@@ -1681,15 +1684,18 @@ xfs_fs_fill_super(
 		}
 	}
 
-	if (xfs_sb_version_hasrmapbt(&mp->m_sb)) {
-		if (mp->m_sb.sb_rblocks) {
-			xfs_alert(mp,
-	"EXPERIMENTAL reverse mapping btree not compatible with realtime device!");
-			error = -EINVAL;
-			goto out_filestream_unmount;
-		}
+	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) && mp->m_sb.sb_rblocks) {
 		xfs_alert(mp,
-	"EXPERIMENTAL reverse mapping btree feature enabled. Use at your own risk!");
+	"reverse mapping btree not compatible with realtime device!");
+		error = -EINVAL;
+		goto out_filestream_unmount;
 	}
 
 	error = xfs_mountfs(mp);