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>

*** 22,31 ****
--- 22,32 ----
   * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
   *
   * Portions Copyright 2010 Robert Milkowski
   *
   * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
+  * Copyright (c) 2012 by Delphix. All rights reserved.
   */
  
  /*
   * ZFS volume emulation driver.
   *
*** 133,143 ****
   * zvol maximum transfer in one DMU tx.
   */
  int zvol_maxphys = DMU_MAX_ACCESS/2;
  
  extern int zfs_set_prop_nvlist(const char *, zprop_source_t,
!     nvlist_t *, nvlist_t **);
  static int zvol_remove_zv(zvol_state_t *);
  static int zvol_get_data(void *arg, lr_write_t *lr, char *buf, zio_t *zio);
  static int zvol_dumpify(zvol_state_t *zv);
  static int zvol_dump_fini(zvol_state_t *zv);
  static int zvol_dump_init(zvol_state_t *zv, boolean_t resize);
--- 134,144 ----
   * zvol maximum transfer in one DMU tx.
   */
  int zvol_maxphys = DMU_MAX_ACCESS/2;
  
  extern int zfs_set_prop_nvlist(const char *, zprop_source_t,
!     nvlist_t *, nvlist_t *);
  static int zvol_remove_zv(zvol_state_t *);
  static int zvol_get_data(void *arg, lr_write_t *lr, char *buf, zio_t *zio);
  static int zvol_dumpify(zvol_state_t *zv);
  static int zvol_dump_fini(zvol_state_t *zv);
  static int zvol_dump_init(zvol_state_t *zv, boolean_t resize);
*** 1883,1893 ****
          if (zv->zv_flags & ZVOL_RDONLY)
                  return (EROFS);
  
          if (zap_lookup(zv->zv_objset, ZVOL_ZAP_OBJ, ZVOL_DUMPSIZE,
              8, 1, &dumpsize) != 0 || dumpsize != zv->zv_volsize) {
!                 boolean_t resize = (dumpsize > 0) ? B_TRUE : B_FALSE;
  
                  if ((error = zvol_dump_init(zv, resize)) != 0) {
                          (void) zvol_dump_fini(zv);
                          return (error);
                  }
--- 1884,1894 ----
          if (zv->zv_flags & ZVOL_RDONLY)
                  return (EROFS);
  
          if (zap_lookup(zv->zv_objset, ZVOL_ZAP_OBJ, ZVOL_DUMPSIZE,
              8, 1, &dumpsize) != 0 || dumpsize != zv->zv_volsize) {
!                 boolean_t resize = (dumpsize > 0);
  
                  if ((error = zvol_dump_init(zv, resize)) != 0) {
                          (void) zvol_dump_fini(zv);
                          return (error);
                  }