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>

*** 50,59 ****
--- 50,60 ----
  typedef struct zilog zilog_t;
  typedef struct spa_aux_vdev spa_aux_vdev_t;
  typedef struct ddt ddt_t;
  typedef struct ddt_entry ddt_entry_t;
  struct dsl_pool;
+ struct dsl_dataset;
  
  /*
   * General-purpose 32-bit and 64-bit bitfield encodings.
   */
  #define BF32_DECODE(x, low, len)        P2PHASE((x) >> (low), 1U << (len))
*** 416,426 ****
  extern int spa_open_rewind(const char *pool, spa_t **, void *tag,
      nvlist_t *policy, nvlist_t **config);
  extern int spa_get_stats(const char *pool, nvlist_t **config, char *altroot,
      size_t buflen);
  extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props,
!     const char *history_str, nvlist_t *zplprops);
  extern int spa_import_rootpool(char *devpath, char *devid);
  extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props,
      uint64_t flags);
  extern nvlist_t *spa_tryimport(nvlist_t *tryconfig);
  extern int spa_destroy(char *pool);
--- 417,427 ----
  extern int spa_open_rewind(const char *pool, spa_t **, void *tag,
      nvlist_t *policy, nvlist_t **config);
  extern int spa_get_stats(const char *pool, nvlist_t **config, char *altroot,
      size_t buflen);
  extern int spa_create(const char *pool, nvlist_t *config, nvlist_t *props,
!     nvlist_t *zplprops);
  extern int spa_import_rootpool(char *devpath, char *devid);
  extern int spa_import(const char *pool, nvlist_t *config, nvlist_t *props,
      uint64_t flags);
  extern nvlist_t *spa_tryimport(nvlist_t *tryconfig);
  extern int spa_destroy(char *pool);
*** 630,664 ****
  extern boolean_t spa_writeable(spa_t *spa);
  
  extern int spa_mode(spa_t *spa);
  extern uint64_t strtonum(const char *str, char **nptr);
  
- /* history logging */
- typedef enum history_log_type {
-         LOG_CMD_POOL_CREATE,
-         LOG_CMD_NORMAL,
-         LOG_INTERNAL
- } history_log_type_t;
- 
- typedef struct history_arg {
-         char *ha_history_str;
-         history_log_type_t ha_log_type;
-         history_internal_events_t ha_event;
-         char *ha_zone;
-         uid_t ha_uid;
- } history_arg_t;
- 
  extern char *spa_his_ievent_table[];
  
  extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx);
  extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read,
      char *his_buf);
! extern int spa_history_log(spa_t *spa, const char *his_buf,
!     history_log_type_t what);
! extern void spa_history_log_internal(history_internal_events_t event,
!     spa_t *spa, dmu_tx_t *tx, const char *fmt, ...);
! extern void spa_history_log_version(spa_t *spa, history_internal_events_t evt);
  
  /* error handling */
  struct zbookmark;
  extern void spa_log_error(spa_t *spa, zio_t *zio);
  extern void zfs_ereport_post(const char *class, spa_t *spa, vdev_t *vd,
--- 631,654 ----
  extern boolean_t spa_writeable(spa_t *spa);
  
  extern int spa_mode(spa_t *spa);
  extern uint64_t strtonum(const char *str, char **nptr);
  
  extern char *spa_his_ievent_table[];
  
  extern void spa_history_create_obj(spa_t *spa, dmu_tx_t *tx);
  extern int spa_history_get(spa_t *spa, uint64_t *offset, uint64_t *len_read,
      char *his_buf);
! extern int spa_history_log(spa_t *spa, const char *his_buf);
! extern int spa_history_log_nvl(spa_t *spa, nvlist_t *nvl);
! extern void spa_history_log_version(spa_t *spa, const char *operation);
! extern void spa_history_log_internal(spa_t *spa, const char *operation,
!     dmu_tx_t *tx, const char *fmt, ...);
! extern void spa_history_log_internal_ds(struct dsl_dataset *ds, const char *op,
!     dmu_tx_t *tx, const char *fmt, ...);
! extern void spa_history_log_internal_dd(dsl_dir_t *dd, const char *operation,
!     dmu_tx_t *tx, const char *fmt, ...);
  
  /* error handling */
  struct zbookmark;
  extern void spa_log_error(spa_t *spa, zio_t *zio);
  extern void zfs_ereport_post(const char *class, spa_t *spa, vdev_t *vd,