3996 want a libzfs_core API to rollback to latest snapshot
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>

*** 18,28 ****
   *
   * CDDL HEADER END
   */
  
  /*
!  * Copyright (c) 2012 by Delphix. All rights reserved.
   */
  
  #ifndef _LIBZFS_CORE_H
  #define _LIBZFS_CORE_H
  
--- 18,28 ----
   *
   * CDDL HEADER END
   */
  
  /*
!  * Copyright (c) 2013 by Delphix. All rights reserved.
   */
  
  #ifndef _LIBZFS_CORE_H
  #define _LIBZFS_CORE_H
  
*** 56,65 ****
--- 56,66 ----
  int lzc_send_space(const char *snapname, const char *fromsnap,
      uint64_t *result);
  
  boolean_t lzc_exists(const char *dataset);
  
+ int lzc_rollback(const char *fsname, char *snapnamebuf, int snapnamelen);
  
  #ifdef  __cplusplus
  }
  #endif