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>

*** 42,51 ****
--- 42,52 ----
  #include <sys/inttypes.h>
  #include <sys/types.h>
  #include <sys/param.h>
  #include <sys/cred.h>
  #include <sys/time.h>
+ #include <sys/fs/zfs.h>
  
  #ifdef  __cplusplus
  extern "C" {
  #endif
  
*** 214,233 ****
          DMU_OTN_UINT64_METADATA = DMU_OT(DMU_BSWAP_UINT64, B_TRUE),
          DMU_OTN_ZAP_DATA = DMU_OT(DMU_BSWAP_ZAP, B_FALSE),
          DMU_OTN_ZAP_METADATA = DMU_OT(DMU_BSWAP_ZAP, B_TRUE),
  } dmu_object_type_t;
  
- typedef enum dmu_objset_type {
-         DMU_OST_NONE,
-         DMU_OST_META,
-         DMU_OST_ZFS,
-         DMU_OST_ZVOL,
-         DMU_OST_OTHER,                  /* For testing only! */
-         DMU_OST_ANY,                    /* Be careful! */
-         DMU_OST_NUMTYPES
- } dmu_objset_type_t;
- 
  void byteswap_uint64_array(void *buf, size_t size);
  void byteswap_uint32_array(void *buf, size_t size);
  void byteswap_uint16_array(void *buf, size_t size);
  void byteswap_uint8_array(void *buf, size_t size);
  void zap_byteswap(void *buf, size_t size);
--- 215,224 ----
*** 268,280 ****
  int dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags,
      void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg);
  int dmu_objset_clone(const char *name, struct dsl_dataset *clone_origin,
      uint64_t flags);
  int dmu_objset_destroy(const char *name, boolean_t defer);
! int dmu_snapshots_destroy_nvl(struct nvlist *snaps, boolean_t defer, char *);
! int dmu_objset_snapshot(char *fsname, char *snapname, char *tag,
!     struct nvlist *props, boolean_t recursive, boolean_t temporary, int fd);
  int dmu_objset_rename(const char *name, const char *newname,
      boolean_t recursive);
  int dmu_objset_find(char *name, int func(const char *, void *), void *arg,
      int flags);
  void dmu_objset_byteswap(void *buf, size_t size);
--- 259,273 ----
  int dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags,
      void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg);
  int dmu_objset_clone(const char *name, struct dsl_dataset *clone_origin,
      uint64_t flags);
  int dmu_objset_destroy(const char *name, boolean_t defer);
! int dmu_snapshots_destroy_nvl(struct nvlist *snaps, boolean_t defer,
!     struct nvlist *errlist);
! int dmu_objset_snapshot(struct nvlist *snaps, struct nvlist *, struct nvlist *);
! int dmu_objset_snapshot_one(const char *fsname, const char *snapname);
! int dmu_objset_snapshot_tmp(const char *, const char *, int);
  int dmu_objset_rename(const char *name, const char *newname,
      boolean_t recursive);
  int dmu_objset_find(char *name, int func(const char *, void *), void *arg,
      int flags);
  void dmu_objset_byteswap(void *buf, size_t size);
*** 787,800 ****
  typedef void (*dmu_traverse_cb_t)(objset_t *os, void *arg, struct blkptr *bp,
      uint64_t object, uint64_t offset, int len);
  void dmu_traverse_objset(objset_t *os, uint64_t txg_start,
      dmu_traverse_cb_t cb, void *arg);
  
! int dmu_send(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin,
      int outfd, struct vnode *vp, offset_t *off);
! int dmu_send_estimate(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorign,
!     uint64_t *sizep);
  
  typedef struct dmu_recv_cookie {
          /*
           * This structure is opaque!
           *
--- 780,792 ----
  typedef void (*dmu_traverse_cb_t)(objset_t *os, void *arg, struct blkptr *bp,
      uint64_t object, uint64_t offset, int len);
  void dmu_traverse_objset(objset_t *os, uint64_t txg_start,
      dmu_traverse_cb_t cb, void *arg);
  
! int dmu_send(objset_t *tosnap, objset_t *fromsnap,
      int outfd, struct vnode *vp, offset_t *off);
! int dmu_send_estimate(objset_t *tosnap, objset_t *fromsnap, uint64_t *sizep);
  
  typedef struct dmu_recv_cookie {
          /*
           * This structure is opaque!
           *