grub patch

*** 16,25 ****
--- 16,28 ----
   *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
   */
   /*
    * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
    */
+ /*
+  *  Copyright 2012, Daniil Lunev
+  */
  
  #ifndef GRUB_ZFS_HEADER
  #define GRUB_ZFS_HEADER 1
  
  #include <grub/err.h>
*** 35,44 ****
--- 38,48 ----
  
  /*
   * On-disk version number.
   */
  #define SPA_VERSION                     33ULL
+ #define SPA_FEATURE_VERSION             5000ULL
  
  /*
   * The following are configuration names used in the nvlist describing a pool's
   * configuration.
   */
*** 132,141 ****
--- 136,147 ----
  grub_err_t
  grub_zfs_add_key (grub_uint8_t *key_in,
                    grub_size_t keylen,
                    int passphrase);
  
+ grub_err_t
+ get_default_bootfs_obj(grub_device_t dev, char * path, grub_uint64_t * mdnobj);
  extern grub_err_t (*grub_zfs_decrypt) (grub_crypto_cipher_handle_t cipher,
                                         grub_uint64_t algo,
                                         void *nonce,
                                         char *buf, grub_size_t size,
                                         const grub_uint32_t *expected_mac,