From: Darrick J. Wong <darrick.wong@oracle.com>
Date: Thu, 1 Feb 2018 00:38:18 +0000 (-0800)
Subject: xfs: don't allow reflink + realtime filesystems
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=c14632ddac98dca7ab1740461fae330d09909560;p=openwrt%2Fstaging%2Fblogic.git

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 0505605e25c1..96388fb9adff 100644
--- 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,