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>

@@ -178,11 +178,11 @@
  */
 #define MAX_TAG_PREFIX_LEN      17
 
 struct dsl_ds_holdarg {
         dsl_sync_task_group_t *dstg;
-        char *htag;
+        const char *htag;
         char *snapname;
         boolean_t recursive;
         boolean_t gotone;
         boolean_t temphold;
         char failed[MAXPATHLEN];

@@ -213,16 +213,15 @@
 uint64_t dsl_dataset_create_sync(dsl_dir_t *pds, const char *lastname,
     dsl_dataset_t *origin, uint64_t flags, cred_t *, dmu_tx_t *);
 uint64_t dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin,
     uint64_t flags, dmu_tx_t *tx);
 int dsl_dataset_destroy(dsl_dataset_t *ds, void *tag, boolean_t defer);
-int dsl_snapshots_destroy(char *fsname, char *snapname, boolean_t defer);
 dsl_checkfunc_t dsl_dataset_destroy_check;
 dsl_syncfunc_t dsl_dataset_destroy_sync;
-dsl_checkfunc_t dsl_dataset_snapshot_check;
-dsl_syncfunc_t dsl_dataset_snapshot_sync;
 dsl_syncfunc_t dsl_dataset_user_hold_sync;
+int dsl_dataset_snapshot_check(dsl_dataset_t *ds, const char *, dmu_tx_t *tx);
+void dsl_dataset_snapshot_sync(dsl_dataset_t *ds, const char *, dmu_tx_t *tx);
 int dsl_dataset_rename(char *name, const char *newname, boolean_t recursive);
 int dsl_dataset_promote(const char *name, char *conflsnap);
 int dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head,
     boolean_t force);
 int dsl_dataset_user_hold(char *dsname, char *snapname, char *htag,