[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, 2 insertions, 0 deletions

diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 78d3cb511eb8..77f0903d2f3e 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -472,6 +472,7 @@ enum {
 
 struct gfs2_sbd {
         struct super_block *sd_vfs;
+        struct super_block *sd_vfs_meta;
         struct kobject sd_kobj;
         unsigned long sd_flags; /* SDF_... */
         struct gfs2_sb sd_sb;
@@ -652,6 +653,7 @@ struct gfs2_sbd {
         /* Debugging crud */
 
         unsigned long sd_last_warning;
+        struct vfsmount *sd_gfs2mnt;
 };
 
 #endif /* __INCORE_DOT_H__ */