[GFS2] gfs2 knows of directories which it chooses not to display

This is for Red Hat bugzilla bug bz #222302:

Moving a virtual IP from node to node between two NFS-over-GFS2
servers was causing one of the GFS2 servers to become confused and
reference a deleted inode.  The problem was due to vfs dentries that did
not reference the gfs2_dops and therefore didn't call the gfs2 revalidate
code to revalidate a dentry after a directory had been deleted & recreated.
This patch is a crosswrite from a RHEL4 bug found in GFS1 as
bz #190756 and it is against the latest -nmw git tree.
Signed-off-by: NRobert Peterson <rpeterso@redhat.com>
Signed-off-by: NSteven Whitehouse <swhiteho@redhat.com>

fs/gfs2/ops_export.c

@@ -22,6 +22,7 @@
 #include "glock.h"
 #include "glops.h"
 #include "inode.h"
+#include "ops_dentry.h"
 #include "ops_export.h"
 #include "rgrp.h"
 #include "util.h"
@@ -189,6 +190,7 @@ static struct dentry *gfs2_get_parent(struct dentry *child)
 		return ERR_PTR(-ENOMEM);
 	}
 
+	dentry->d_op = &gfs2_dops;
 	return dentry;
 }
 
@@ -269,6 +271,7 @@ static struct dentry *gfs2_get_dentry(struct super_block *sb, void *inum_obj)
 		return ERR_PTR(-ENOMEM);
 	}
 
+	dentry->d_op = &gfs2_dops;
 	return dentry;
 
 fail_rgd: