• Steven Whitehouse's avatar
    GFS2: Fix metafs mounts · 9b8df98f
    Steven Whitehouse authored
    This patch is intended to fix the issues reported in bz #457798. Instead
    of having the metafs as a separate filesystem, it becomes a second root
    of gfs2. As a result it will appear as type gfs2 in /proc/mounts, but it
    is still possible (for backwards compatibility purposes) to mount it as
    type gfs2meta. A new mount flag "meta" is introduced so that its possible
    to tell the two cases apart in /proc/mounts.
    
    As a result it becomes possible to mount type gfs2 with -o meta and
    get the same result as mounting type gfs2meta. So it is possible to
    mount just the metafs on its own. Currently if you do this, its then
    impossible to mount the "normal" root of the gfs2 filesystem without
    first unmounting the metafs root. I'm not sure if thats a feature or
    a bug :-)
    
    Either way, this is a great improvement on the previous scheme and I've
    verified that it works ok with bind mounts on both the "normal" root
    and the metafs root in various combinations.
    
    There were also a bunch of functions in super.c which didn't belong there,
    so this moves them into ops_fstype.c where they can be static. Hopefully
    the mount/umount sequence is now more obvious as a result.
    Signed-off-by: default avatarSteven Whitehouse <swhiteho@redhat.com>
    Cc: Alexander Viro <aviro@redhat.com>
    9b8df98f
super.h 1.58 KB