2882 implement libzfs_core
2883 changing "canmount" property to "on" should not always remount dataset
2900 "zfs snapshot" should be able to create multiple, arbitrary snapshots at once
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Chris Siden <christopher.siden@delphix.com>
Reviewed by: Garrett D'Amore <garrett@damore.org>
Reviewed by: Bill Pijewski <wdp@joyent.com>
Reviewed by: Dan Kruchinin <dan.kruchinin@gmail.com>

*** 18,28 ****
   *
   * CDDL HEADER END
   */
  /*
   * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
!  * Copyright (c) 2011 by Delphix. All rights reserved.
   */
  
  #ifndef _SYS_DSL_DELEG_H
  #define _SYS_DSL_DELEG_H
  
--- 18,28 ----
   *
   * CDDL HEADER END
   */
  /*
   * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
!  * Copyright (c) 2012 by Delphix. All rights reserved.
   */
  
  #ifndef _SYS_DSL_DELEG_H
  #define _SYS_DSL_DELEG_H
  
*** 63,74 ****
   */
  
  int dsl_deleg_get(const char *ddname, nvlist_t **nvp);
  int dsl_deleg_set(const char *ddname, nvlist_t *nvp, boolean_t unset);
  int dsl_deleg_access(const char *ddname, const char *perm, cred_t *cr);
! int dsl_deleg_access_impl(struct dsl_dataset *ds, boolean_t descendent,
!     const char *perm, cred_t *cr);
  void dsl_deleg_set_create_perms(dsl_dir_t *dd, dmu_tx_t *tx, cred_t *cr);
  int dsl_deleg_can_allow(char *ddname, nvlist_t *nvp, cred_t *cr);
  int dsl_deleg_can_unallow(char *ddname, nvlist_t *nvp, cred_t *cr);
  int dsl_deleg_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx);
  boolean_t dsl_delegation_on(objset_t *os);
--- 63,73 ----
   */
  
  int dsl_deleg_get(const char *ddname, nvlist_t **nvp);
  int dsl_deleg_set(const char *ddname, nvlist_t *nvp, boolean_t unset);
  int dsl_deleg_access(const char *ddname, const char *perm, cred_t *cr);
! int dsl_deleg_access_impl(struct dsl_dataset *ds, const char *perm, cred_t *cr);
  void dsl_deleg_set_create_perms(dsl_dir_t *dd, dmu_tx_t *tx, cred_t *cr);
  int dsl_deleg_can_allow(char *ddname, nvlist_t *nvp, cred_t *cr);
  int dsl_deleg_can_unallow(char *ddname, nvlist_t *nvp, cred_t *cr);
  int dsl_deleg_destroy(objset_t *os, uint64_t zapobj, dmu_tx_t *tx);
  boolean_t dsl_delegation_on(objset_t *os);