[POWERPC] spufs: add mode= mount option

Add a 'mode=' option to spufs mount arguments. This allows more
control over access to the top-level spufs directory.

Tested on Cell.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>

1 files changed, 10 insertions, 4 deletions

diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c
index 6b52dfabaeef..8f6cd8763306 100644
--- a/arch/powerpc/platforms/cell/spufs/inode.c
+++ b/arch/powerpc/platforms/cell/spufs/inode.c
@@ -521,13 +521,14 @@ out:
 
 /* File system initialization */
 enum {
-        Opt_uid, Opt_gid, Opt_err,
+        Opt_uid, Opt_gid, Opt_mode, Opt_err,
 };
 
 static match_table_t spufs_tokens = {
-        { Opt_uid, "uid=%d" },
-        { Opt_gid, "gid=%d" },
-        { Opt_err, NULL  },
+        { Opt_uid,  "uid=%d" },
+        { Opt_gid,  "gid=%d" },
+        { Opt_mode, "mode=%o" },
+        { Opt_err,   NULL  },
 };
 
 static int
@@ -554,6 +555,11 @@ spufs_parse_options(char *options, struct inode *root)
                                 return 0;
                         root->i_gid = option;
                         break;
+                case Opt_mode:
+                        if (match_octal(&args[0], &option))
+                                return 0;
+                        root->i_mode = option | S_IFDIR;
+                        break;
                 default:
                         return 0;
                 }