Illumos 4368, 4369.

4369 implement zfs bookmarks
4368 zfs send filesystems from readonly pools
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Approved by: Garrett D'Amore <garrett@damore.org>

References:
  https://www.illumos.org/issues/4369
  https://www.illumos.org/issues/4368
  https://github.com/illumos/illumos-gate/commit/78f1710

Ported by: Tim Chase <tim@chase2k.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2530

include/sys/fs/zfs.h

@@ -46,10 +46,11 @@ extern "C" {
  * combined into masks that can be passed to various functions.
  */
 typedef enum {
-	ZFS_TYPE_FILESYSTEM	= 0x1,
-	ZFS_TYPE_SNAPSHOT	= 0x2,
-	ZFS_TYPE_VOLUME		= 0x4,
-	ZFS_TYPE_POOL		= 0x8
+	ZFS_TYPE_FILESYSTEM	= (1 << 0),
+	ZFS_TYPE_SNAPSHOT	= (1 << 1),
+	ZFS_TYPE_VOLUME		= (1 << 2),
+	ZFS_TYPE_POOL		= (1 << 3),
+	ZFS_TYPE_BOOKMARK	= (1 << 4)
 } zfs_type_t;
 
 typedef enum dmu_objset_type {
@@ -786,7 +787,7 @@ typedef struct ddt_histogram {
  */
 typedef enum zfs_ioc {
 	/*
-	 * Illumos - 69/128 numbers reserved.
+	 * Illumos - 70/128 numbers reserved.
 	 */
 	ZFS_IOC_FIRST =	('Z' << 8),
 	ZFS_IOC = ZFS_IOC_FIRST,
@@ -857,6 +858,9 @@ typedef enum zfs_ioc {
 	ZFS_IOC_SEND_NEW,
 	ZFS_IOC_SEND_SPACE,
 	ZFS_IOC_CLONE,
+	ZFS_IOC_BOOKMARK,
+	ZFS_IOC_GET_BOOKMARKS,
+	ZFS_IOC_DESTROY_BOOKMARKS,
 
 	/*
 	 * Linux - 3/64 numbers reserved.