[GFS2] Fix for root inode ref count bug

Umount is now working correctly again. The bug was due to
not getting an extra ref count when mounting the fs. We
should have bumped it by two (once for the internal pointer
to the root inode from the super block and once for the
inode hanging off the dcache entry for root).

Also this patch tidys up the code dealing with looking up
and creating inodes. We now pass Linux inodes (with gfs2_inodes
attached) rather than the other way around and this reduces code
duplication in various places.

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

1 files changed, 1 insertions, 8 deletions

diff --git a/fs/gfs2/ops_export.c b/fs/gfs2/ops_export.c
index 335448d3be21..8389f771d28b 100644
--- a/fs/gfs2/ops_export.c
+++ b/fs/gfs2/ops_export.c
@@ -169,23 +169,16 @@ static struct dentry *gfs2_get_parent(struct dentry *child)
 {
         struct gfs2_inode *dip = get_v2ip(child->d_inode);
         struct qstr dotdot = { .name = "..", .len = 2 };
-        struct gfs2_inode *ip;
         struct inode *inode;
         struct dentry *dentry;
         int error;
 
         atomic_inc(&dip->i_sbd->sd_ops_export);
 
-        error = gfs2_lookupi(dip, &dotdot, 1, &ip);
+        error = gfs2_lookupi(child->d_inode, &dotdot, 1, &inode);
         if (error)
                 return ERR_PTR(error);
 
-        inode = gfs2_ip2v(ip);
-        gfs2_inode_put(ip);
-
-        if (!inode)
-                return ERR_PTR(-ENOMEM);
-
         dentry = d_alloc_anon(inode);
         if (!dentry) {
                 iput(inode);