[GFS2] Allow mounting of gfs2 and gfs2meta at the same time

This patch allows the simultaneous mounting of gfs2meta and gfs2
filesystems. A restriction however is that a gfs2meta fs may only be
mounted if its corresponding gfs2 filesystem is also mounted. Also, a
gfs2 filesystem cannot be unmounted before its gfs2meta filesystem.

Signed-off-by: Abhijith Das <adas@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/gfs2/ops_super.c b/fs/gfs2/ops_super.c
index 2e392c994ab1..18ed18c729e8 100644
--- a/fs/gfs2/ops_super.c
+++ b/fs/gfs2/ops_super.c
@@ -78,6 +78,9 @@ static void gfs2_put_super(struct super_block *sb)
         if (!sdp)
                 return;
 
+        if (!strncmp(sb->s_type->name, "gfs2meta", 8))
+                return; /* meta fs. don't do nothin' */
+
         /*  Unfreeze the filesystem, if we need to  */
 
         mutex_lock(&sdp->sd_freeze_lock);