NFSv4: Don't require that NFSv4 mount paths begin with '/'

Addresses the regression noted in
  http://bugzilla.linux-nfs.org/show_bug.cgi?id=134

Also mark a couple of other regressions as requiring fixing.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 6 insertions, 5 deletions

diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c
index 8391bd7a83ce..6ef268f7c300 100644
--- a/fs/nfs/getroot.c
+++ b/fs/nfs/getroot.c
@@ -135,17 +135,15 @@ int nfs4_path_walk(struct nfs_server *server,
         struct nfs_fh lastfh;
         struct qstr name;
         int ret;
-        //int referral_count = 0;
 
         dprintk("--> nfs4_path_walk(,,%s)\n", path);
 
         fsinfo.fattr = &fattr;
         nfs_fattr_init(&fattr);
 
-        if (*path++ != '/') {
-                dprintk("nfs4_get_root: Path does not begin with a slash\n");
-                return -EINVAL;
-        }
+        /* Eat leading slashes */
+        while (*path == '/')
+                path++;
 
         /* Start by getting the root filehandle from the server */
         ret = server->nfs_client->rpc_ops->getroot(server, mntfh, &fsinfo);
@@ -160,6 +158,7 @@ int nfs4_path_walk(struct nfs_server *server,
                 return -ENOTDIR;
         }
 
+        /* FIXME: It is quite valid for the server to return a referral here */
         if (fattr.valid & NFS_ATTR_FATTR_V4_REFERRAL) {
                 printk(KERN_ERR "nfs4_get_root:"
                        " getroot obtained referral\n");
@@ -187,6 +186,7 @@ eat_dot_dir:
                 goto eat_dot_dir;
         }
 
+        /* FIXME: Why shouldn't the user be able to use ".." in the path? */
         if (path[0] == '.' && path[1] == '.' && (path[2] == '/' || !path[2])
             ) {
                 printk(KERN_ERR "nfs4_get_root:"
@@ -212,6 +212,7 @@ eat_dot_dir:
                 return -ENOTDIR;
         }
 
+        /* FIXME: Referrals are quite valid here too */
         if (fattr.valid & NFS_ATTR_FATTR_V4_REFERRAL) {
                 printk(KERN_ERR "nfs4_get_root:"
                        " lookupfh obtained referral\n");