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>

*** 226,236 ****
          scn->scn_phys.scn_queue_obj = zap_create(dp->dp_meta_objset,
              ot ? ot : DMU_OT_SCAN_QUEUE, DMU_OT_NONE, 0, tx);
  
          dsl_scan_sync_state(scn, tx);
  
!         spa_history_log_internal(LOG_POOL_SCAN, spa, tx,
              "func=%u mintxg=%llu maxtxg=%llu",
              *funcp, scn->scn_phys.scn_min_txg, scn->scn_phys.scn_max_txg);
  }
  
  /* ARGSUSED */
--- 226,236 ----
          scn->scn_phys.scn_queue_obj = zap_create(dp->dp_meta_objset,
              ot ? ot : DMU_OT_SCAN_QUEUE, DMU_OT_NONE, 0, tx);
  
          dsl_scan_sync_state(scn, tx);
  
!         spa_history_log_internal(spa, "scan setup", tx,
              "func=%u mintxg=%llu maxtxg=%llu",
              *funcp, scn->scn_phys.scn_min_txg, scn->scn_phys.scn_max_txg);
  }
  
  /* ARGSUSED */
*** 275,285 ****
          if (complete)
                  scn->scn_phys.scn_state = DSS_FINISHED;
          else
                  scn->scn_phys.scn_state = DSS_CANCELED;
  
!         spa_history_log_internal(LOG_POOL_SCAN_DONE, spa, tx,
              "complete=%u", complete);
  
          if (DSL_SCAN_IS_SCRUB_RESILVER(scn)) {
                  mutex_enter(&spa->spa_scrub_lock);
                  while (spa->spa_scrub_inflight > 0) {
--- 275,285 ----
          if (complete)
                  scn->scn_phys.scn_state = DSS_FINISHED;
          else
                  scn->scn_phys.scn_state = DSS_CANCELED;
  
!         spa_history_log_internal(spa, "scan done", tx,
              "complete=%u", complete);
  
          if (DSL_SCAN_IS_SCRUB_RESILVER(scn)) {
                  mutex_enter(&spa->spa_scrub_lock);
                  while (spa->spa_scrub_inflight > 0) {