NFSv4: Send unmapped uid/gids to the server when using auth_sys

[linux-2.6-block.git] / fs / nfs / client.c

diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 6dd50ac5b545c21d31954165df0c919ccac9539c..139be9647d80ed9c95a13c83d147a7355befd51b 100644 (file)
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -81,6 +81,11 @@ retry:
 }
 #endif /* CONFIG_NFS_V4 */
 
+/*
+ * Turn off NFSv4 uid/gid mapping when using AUTH_SYS
+ */
+static int nfs4_disable_idmapping = 0;
+
 /*
  * RPC cruft for NFS
  */
@@ -1567,6 +1572,13 @@ static int nfs4_init_server(struct nfs_server *server,
        if (error < 0)
                goto error;
 
+       /*
+        * Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower
+        * authentication.
+        */
+       if (nfs4_disable_idmapping && data->auth_flavors[0] == RPC_AUTH_UNIX)
+               server->caps |= NFS_CAP_UIDGID_NOMAP;
+
        if (data->rsize)
                server->rsize = nfs_block_size(data->rsize, NULL);
        if (data->wsize)
@@ -1984,3 +1996,7 @@ void nfs_fs_proc_exit(void)
 }
 
 #endif /* CONFIG_PROC_FS */
+
+module_param(nfs4_disable_idmapping, bool, 0644);
+MODULE_PARM_DESC(nfs4_disable_idmapping,
+               "Turn off NFSv4 idmapping when using 'sec=sys'");