1 files changed, 18 insertions, 7 deletions

diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
index d8b8d56266cb..77b00684894d 100644
--- a/fs/nfs/namespace.c
+++ b/fs/nfs/namespace.c
@@ -2,6 +2,7 @@
  * linux/fs/nfs/namespace.c
  *
  * Copyright (C) 2005 Trond Myklebust <Trond.Myklebust@netapp.com>
+ * - Modified by David Howells <dhowells@redhat.com>
  *
  * NFS namespace
  */
@@ -28,6 +29,7 @@ int nfs_mountpoint_expiry_timeout = 500 * HZ;
 /*
  * nfs_path - reconstruct the path given an arbitrary dentry
  * @base - arbitrary string to prepend to the path
+ * @droot - pointer to root dentry for mountpoint
  * @dentry - pointer to dentry
  * @buffer - result buffer
  * @buflen - length of buffer
@@ -38,7 +40,9 @@ int nfs_mountpoint_expiry_timeout = 500 * HZ;
  * This is mainly for use in figuring out the path on the
  * server side when automounting on top of an existing partition.
  */
-char *nfs_path(const char *base, const struct dentry *dentry,
+char *nfs_path(const char *base,
+               const struct dentry *droot,
+               const struct dentry *dentry,
                char *buffer, ssize_t buflen)
 {
         char *end = buffer+buflen;
@@ -47,7 +51,7 @@ char *nfs_path(const char *base, const struct dentry *dentry,
         *--end = '\0';
         buflen--;
         spin_lock(&dcache_lock);
-        while (!IS_ROOT(dentry)) {
+        while (!IS_ROOT(dentry) && dentry != droot) {
                 namelen = dentry->d_name.len;
                 buflen -= namelen + 1;
                 if (buflen < 0)
@@ -96,12 +100,13 @@ static void * nfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd)
         struct nfs_fattr fattr;
         int err;
 
+        dprintk("--> nfs_follow_mountpoint()\n");
+
         BUG_ON(IS_ROOT(dentry));
         dprintk("%s: enter\n", __FUNCTION__);
         dput(nd->dentry);
         nd->dentry = dget(dentry);
-        if (d_mountpoint(nd->dentry))
-                goto out_follow;
+
         /* Look it up again */
         parent = dget_parent(nd->dentry);
         err = server->nfs_client->rpc_ops->lookup(parent->d_inode,
@@ -134,6 +139,8 @@ static void * nfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd)
         schedule_delayed_work(&nfs_automount_task, nfs_mountpoint_expiry_timeout);
 out:
         dprintk("%s: done, returned %d\n", __FUNCTION__, err);
+
+        dprintk("<-- nfs_follow_mountpoint() = %d\n", err);
         return ERR_PTR(err);
 out_err:
         path_release(nd);
@@ -183,14 +190,14 @@ static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server,
         switch (server->nfs_client->cl_nfsversion) {
                 case 2:
                 case 3:
-                        mnt = vfs_kern_mount(&clone_nfs_fs_type, 0, devname, mountdata);
+                        mnt = vfs_kern_mount(&nfs_xdev_fs_type, 0, devname, mountdata);
                         break;
                 case 4:
-                        mnt = vfs_kern_mount(&clone_nfs4_fs_type, 0, devname, mountdata);
+                        mnt = vfs_kern_mount(&nfs4_xdev_fs_type, 0, devname, mountdata);
         }
         return mnt;
 #else
-        return vfs_kern_mount(&clone_nfs_fs_type, 0, devname, mountdata);
+        return vfs_kern_mount(&nfs_xdev_fs_type, 0, devname, mountdata);
 #endif
 }
 
@@ -216,6 +223,8 @@ struct vfsmount *nfs_do_submount(const struct vfsmount *mnt_parent,
         char *page = (char *) __get_free_page(GFP_USER);
         char *devname;
 
+        dprintk("--> nfs_do_submount()\n");
+
         dprintk("%s: submounting on %s/%s\n", __FUNCTION__,
                         dentry->d_parent->d_name.name,
                         dentry->d_name.name);
@@ -230,5 +239,7 @@ free_page:
         free_page((unsigned long)page);
 out:
         dprintk("%s: done\n", __FUNCTION__);
+
+        dprintk("<-- nfs_do_submount() = %p\n", mnt);
         return mnt;
 }