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authorSteven Whitehouse <swhiteho@redhat.com>2008-08-08 13:45:13 +0100
committerSteven Whitehouse <swhiteho@redhat.com>2008-08-13 09:59:40 +0100
commit9b8df98fc8973ad1c5f0d7c4cf71c7fb84fe22c5 (patch)
tree6a0445afd83d0f7a63a301c2e146647abf59ad82 /fs/gfs2/mount.c
parentc1e817d03a7de57a963654c35e6e80af9a5dbff5 (diff)
GFS2: Fix metafs mounts
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: Steven Whitehouse <swhiteho@redhat.com> Cc: Alexander Viro <aviro@redhat.com>
Diffstat (limited to 'fs/gfs2/mount.c')
-rw-r--r--fs/gfs2/mount.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/gfs2/mount.c b/fs/gfs2/mount.c
index b941f9f9f958..df48333e6f01 100644
--- a/fs/gfs2/mount.c
+++ b/fs/gfs2/mount.c
@@ -42,6 +42,7 @@ enum {
Opt_nosuiddir,
Opt_data_writeback,
Opt_data_ordered,
+ Opt_meta,
Opt_err,
};
@@ -66,6 +67,7 @@ static match_table_t tokens = {
{Opt_nosuiddir, "nosuiddir"},
{Opt_data_writeback, "data=writeback"},
{Opt_data_ordered, "data=ordered"},
+ {Opt_meta, "meta"},
{Opt_err, NULL}
};
@@ -239,6 +241,11 @@ int gfs2_mount_args(struct gfs2_sbd *sdp, char *data_arg, int remount)
case Opt_data_ordered:
args->ar_data = GFS2_DATA_ORDERED;
break;
+ case Opt_meta:
+ if (remount && args->ar_meta != 1)
+ goto cant_remount;
+ args->ar_meta = 1;
+ break;
case Opt_err:
default:
fs_info(sdp, "unknown option: %s\n", o);