summaryrefslogtreecommitdiffstats
path: root/include/sys/fs/zfs.h
blob: 45b6d4981bcaf8dc2df14dceb2caaddfc056fdb6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2011, 2014 by Delphix. All rights reserved.
 * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
 * Copyright (c) 2013, Joyent, Inc. All rights reserved.
 */

/* Portions Copyright 2010 Robert Milkowski */

#ifndef	_SYS_FS_ZFS_H
#define	_SYS_FS_ZFS_H

#include <sys/time.h>
#include <sys/zio_priority.h>

#ifdef	__cplusplus
extern "C" {
#endif

/*
 * Types and constants shared between userland and the kernel.
 */

/*
 * Each dataset can be one of the following types.  These constants can be
 * combined into masks that can be passed to various functions.
 */
typedef enum {
	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 {
	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;

#define	ZFS_TYPE_DATASET	\
	(ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME | ZFS_TYPE_SNAPSHOT)

/*
 * All of these include the terminating NUL byte.
 */
#define	ZAP_MAXNAMELEN 256
#define	ZAP_MAXVALUELEN (1024 * 8)
#define	ZAP_OLDMAXVALUELEN 1024
#define	ZFS_MAX_DATASET_NAME_LEN 256

/*
 * Dataset properties are identified by these constants and must be added to
 * the end of this list to ensure that external consumers are not affected
 * by the change. If you make any changes to this list, be sure to update
 * the property table in module/zcommon/zfs_prop.c.
 */
typedef enum {
	ZFS_PROP_TYPE,
	ZFS_PROP_CREATION,
	ZFS_PROP_USED,
	ZFS_PROP_AVAILABLE,
	ZFS_PROP_REFERENCED,
	ZFS_PROP_COMPRESSRATIO,
	ZFS_PROP_MOUNTED,
	ZFS_PROP_ORIGIN,
	ZFS_PROP_QUOTA,
	ZFS_PROP_RESERVATION,
	ZFS_PROP_VOLSIZE,
	ZFS_PROP_VOLBLOCKSIZE,
	ZFS_PROP_RECORDSIZE,
	ZFS_PROP_MOUNTPOINT,
	ZFS_PROP_SHARENFS,
	ZFS_PROP_CHECKSUM,
	ZFS_PROP_COMPRESSION,
	ZFS_PROP_ATIME,
	ZFS_PROP_DEVICES,
	ZFS_PROP_EXEC,
	ZFS_PROP_SETUID,
	ZFS_PROP_READONLY,
	ZFS_PROP_ZONED,
	ZFS_PROP_SNAPDIR,
	ZFS_PROP_PRIVATE,		/* not exposed to user, temporary */
	ZFS_PROP_ACLINHERIT,
	ZFS_PROP_CREATETXG,		/* not exposed to the user */
	ZFS_PROP_NAME,			/* not exposed to the user */
	ZFS_PROP_CANMOUNT,
	ZFS_PROP_ISCSIOPTIONS,		/* not exposed to the user */
	ZFS_PROP_XATTR,
	ZFS_PROP_NUMCLONES,		/* not exposed to the user */
	ZFS_PROP_COPIES,
	ZFS_PROP_VERSION,
	ZFS_PROP_UTF8ONLY,
	ZFS_PROP_NORMALIZE,
	ZFS_PROP_CASE,
	ZFS_PROP_VSCAN,
	ZFS_PROP_NBMAND,
	ZFS_PROP_SHARESMB,
	ZFS_PROP_REFQUOTA,
	ZFS_PROP_REFRESERVATION,
	ZFS_PROP_GUID,
	ZFS_PROP_PRIMARYCACHE,
	ZFS_PROP_SECONDARYCACHE,
	ZFS_PROP_USEDSNAP,
	ZFS_PROP_USEDDS,
	ZFS_PROP_USEDCHILD,
	ZFS_PROP_USEDREFRESERV,
	ZFS_PROP_USERACCOUNTING,	/* not exposed to the user */
	ZFS_PROP_STMF_SHAREINFO,	/* not exposed to the user */
	ZFS_PROP_DEFER_DESTROY,
	ZFS_PROP_USERREFS,
	ZFS_PROP_LOGBIAS,
	ZFS_PROP_UNIQUE,		/* not exposed to the user */
	ZFS_PROP_OBJSETID,		/* not exposed to the user */
	ZFS_PROP_DEDUP,
	ZFS_PROP_MLSLABEL,
	ZFS_PROP_SYNC,
	ZFS_PROP_DNODESIZE,
	ZFS_PROP_REFRATIO,
	ZFS_PROP_WRITTEN,
	ZFS_PROP_CLONES,
	ZFS_PROP_LOGICALUSED,
	ZFS_PROP_LOGICALREFERENCED,
	ZFS_PROP_INCONSISTENT,		/* not exposed to the user */
	ZFS_PROP_FILESYSTEM_LIMIT,
	ZFS_PROP_SNAPSHOT_LIMIT,
	ZFS_PROP_FILESYSTEM_COUNT,
	ZFS_PROP_SNAPSHOT_COUNT,
	ZFS_PROP_SNAPDEV,
	ZFS_PROP_ACLTYPE,
	ZFS_PROP_SELINUX_CONTEXT,
	ZFS_PROP_SELINUX_FSCONTEXT,
	ZFS_PROP_SELINUX_DEFCONTEXT,
	ZFS_PROP_SELINUX_ROOTCONTEXT,
	ZFS_PROP_RELATIME,
	ZFS_PROP_REDUNDANT_METADATA,
	ZFS_PROP_OVERLAY,
	ZFS_PROP_PREV_SNAP,
	ZFS_PROP_RECEIVE_RESUME_TOKEN,
	ZFS_NUM_PROPS
} zfs_prop_t;

typedef enum {
	ZFS_PROP_USERUSED,
	ZFS_PROP_USERQUOTA,
	ZFS_PROP_GROUPUSED,
	ZFS_PROP_GROUPQUOTA,
	ZFS_PROP_USEROBJUSED,
	ZFS_PROP_USEROBJQUOTA,
	ZFS_PROP_GROUPOBJUSED,
	ZFS_PROP_GROUPOBJQUOTA,
	ZFS_NUM_USERQUOTA_PROPS
} zfs_userquota_prop_t;

extern const char *zfs_userquota_prop_prefixes[ZFS_NUM_USERQUOTA_PROPS];

/*
 * Pool properties are identified by these constants and must be added to the
 * end of this list to ensure that external consumers are not affected
 * by the change. If you make any changes to this list, be sure to update
 * the property table in module/zcommon/zpool_prop.c.
 */
typedef enum {
	ZPOOL_PROP_NAME,
	ZPOOL_PROP_SIZE,
	ZPOOL_PROP_CAPACITY,
	ZPOOL_PROP_ALTROOT,
	ZPOOL_PROP_HEALTH,
	ZPOOL_PROP_GUID,
	ZPOOL_PROP_VERSION,
	ZPOOL_PROP_BOOTFS,
	ZPOOL_PROP_DELEGATION,
	ZPOOL_PROP_AUTOREPLACE,
	ZPOOL_PROP_CACHEFILE,
	ZPOOL_PROP_FAILUREMODE,
	ZPOOL_PROP_LISTSNAPS,
	ZPOOL_PROP_AUTOEXPAND,
	ZPOOL_PROP_DEDUPDITTO,
	ZPOOL_PROP_DEDUPRATIO,
	ZPOOL_PROP_FREE,
	ZPOOL_PROP_ALLOCATED,
	ZPOOL_PROP_READONLY,
	ZPOOL_PROP_ASHIFT,
	ZPOOL_PROP_COMMENT,
	ZPOOL_PROP_EXPANDSZ,
	ZPOOL_PROP_FREEING,
	ZPOOL_PROP_FRAGMENTATION,
	ZPOOL_PROP_LEAKED,
	ZPOOL_PROP_MAXBLOCKSIZE,
	ZPOOL_PROP_TNAME,
	ZPOOL_PROP_MAXDNODESIZE,
	ZPOOL_NUM_PROPS
} zpool_prop_t;

/* Small enough to not hog a whole line of printout in zpool(1M). */
#define	ZPROP_MAX_COMMENT	32

#define	ZPROP_CONT		-2
#define	ZPROP_INVAL		-1

#define	ZPROP_VALUE		"value"
#define	ZPROP_SOURCE		"source"

typedef enum {
	ZPROP_SRC_NONE = 0x1,
	ZPROP_SRC_DEFAULT = 0x2,
	ZPROP_SRC_TEMPORARY = 0x4,
	ZPROP_SRC_LOCAL = 0x8,
	ZPROP_SRC_INHERITED = 0x10,
	ZPROP_SRC_RECEIVED = 0x20
} zprop_source_t;

#define	ZPROP_SRC_ALL	0x3f

#define	ZPROP_SOURCE_VAL_RECVD	"$recvd"
#define	ZPROP_N_MORE_ERRORS	"N_MORE_ERRORS"

/*
 * Dataset flag implemented as a special entry in the props zap object
 * indicating that the dataset has received properties on or after
 * SPA_VERSION_RECVD_PROPS. The first such receive blows away local properties
 * just as it did in earlier versions, and thereafter, local properties are
 * preserved.
 */
#define	ZPROP_HAS_RECVD		"$hasrecvd"

typedef enum {
	ZPROP_ERR_NOCLEAR = 0x1, /* failure to clear existing props */
	ZPROP_ERR_NORESTORE = 0x2 /* failure to restore props on error */
} zprop_errflags_t;

typedef int (*zprop_func)(int, void *);

/*
 * Properties to be set on the root file system of a new pool
 * are stuffed into their own nvlist, which is then included in
 * the properties nvlist with the pool properties.
 */
#define	ZPOOL_ROOTFS_PROPS	"root-props-nvl"

/*
 * Dataset property functions shared between libzfs and kernel.
 */
const char *zfs_prop_default_string(zfs_prop_t);
uint64_t zfs_prop_default_numeric(zfs_prop_t);
boolean_t zfs_prop_readonly(zfs_prop_t);
boolean_t zfs_prop_inheritable(zfs_prop_t);
boolean_t zfs_prop_setonce(zfs_prop_t);
const char *zfs_prop_to_name(zfs_prop_t);
zfs_prop_t zfs_name_to_prop(const char *);
boolean_t zfs_prop_user(const char *);
boolean_t zfs_prop_userquota(const char *);
boolean_t zfs_prop_written(const char *);
int zfs_prop_index_to_string(zfs_prop_t, uint64_t, const char **);
int zfs_prop_string_to_index(zfs_prop_t, const char *, uint64_t *);
uint64_t zfs_prop_random_value(zfs_prop_t, uint64_t seed);
boolean_t zfs_prop_valid_for_type(int, zfs_type_t, boolean_t);

/*
 * Pool property functions shared between libzfs and kernel.
 */
zpool_prop_t zpool_name_to_prop(const char *);
const char *zpool_prop_to_name(zpool_prop_t);
const char *zpool_prop_default_string(zpool_prop_t);
uint64_t zpool_prop_default_numeric(zpool_prop_t);
boolean_t zpool_prop_readonly(zpool_prop_t);
boolean_t zpool_prop_feature(const char *);
boolean_t zpool_prop_unsupported(const char *);
int zpool_prop_index_to_string(zpool_prop_t, uint64_t, const char **);
int zpool_prop_string_to_index(zpool_prop_t, const char *, uint64_t *);
uint64_t zpool_prop_random_value(zpool_prop_t, uint64_t seed);

/*
 * Definitions for the Delegation.
 */
typedef enum {
	ZFS_DELEG_WHO_UNKNOWN = 0,
	ZFS_DELEG_USER = 'u',
	ZFS_DELEG_USER_SETS = 'U',
	ZFS_DELEG_GROUP = 'g',
	ZFS_DELEG_GROUP_SETS = 'G',
	ZFS_DELEG_EVERYONE = 'e',
	ZFS_DELEG_EVERYONE_SETS = 'E',
	ZFS_DELEG_CREATE = 'c',
	ZFS_DELEG_CREATE_SETS = 'C',
	ZFS_DELEG_NAMED_SET = 's',
	ZFS_DELEG_NAMED_SET_SETS = 'S'
} zfs_deleg_who_type_t;

typedef enum {
	ZFS_DELEG_NONE = 0,
	ZFS_DELEG_PERM_LOCAL = 1,
	ZFS_DELEG_PERM_DESCENDENT = 2,
	ZFS_DELEG_PERM_LOCALDESCENDENT = 3,
	ZFS_DELEG_PERM_CREATE = 4
} zfs_deleg_inherit_t;

#define	ZFS_DELEG_PERM_UID	"uid"
#define	ZFS_DELEG_PERM_GID	"gid"
#define	ZFS_DELEG_PERM_GROUPS	"groups"

#define	ZFS_MLSLABEL_DEFAULT	"none"

#define	ZFS_SMB_ACL_SRC		"src"
#define	ZFS_SMB_ACL_TARGET	"target"

typedef enum {
	ZFS_CANMOUNT_OFF = 0,
	ZFS_CANMOUNT_ON = 1,
	ZFS_CANMOUNT_NOAUTO = 2
} zfs_canmount_type_t;

typedef enum {
	ZFS_LOGBIAS_LATENCY = 0,
	ZFS_LOGBIAS_THROUGHPUT = 1
} zfs_logbias_op_t;

typedef enum zfs_share_op {
	ZFS_SHARE_NFS = 0,
	ZFS_UNSHARE_NFS = 1,
	ZFS_SHARE_SMB = 2,
	ZFS_UNSHARE_SMB = 3
} zfs_share_op_t;

typedef enum zfs_smb_acl_op {
	ZFS_SMB_ACL_ADD,
	ZFS_SMB_ACL_REMOVE,
	ZFS_SMB_ACL_RENAME,
	ZFS_SMB_ACL_PURGE
} zfs_smb_acl_op_t;

typedef enum zfs_cache_type {
	ZFS_CACHE_NONE = 0,
	ZFS_CACHE_METADATA = 1,
	ZFS_CACHE_ALL = 2
} zfs_cache_type_t;

typedef enum {
	ZFS_SYNC_STANDARD = 0,
	ZFS_SYNC_ALWAYS = 1,
	ZFS_SYNC_DISABLED = 2
} zfs_sync_type_t;

typedef enum {
	ZFS_XATTR_OFF = 0,
	ZFS_XATTR_DIR = 1,
	ZFS_XATTR_SA = 2
} zfs_xattr_type_t;

typedef enum {
	ZFS_DNSIZE_LEGACY = 0,
	ZFS_DNSIZE_AUTO = 1,
	ZFS_DNSIZE_1K = 1024,
	ZFS_DNSIZE_2K = 2048,
	ZFS_DNSIZE_4K = 4096,
	ZFS_DNSIZE_8K = 8192,
	ZFS_DNSIZE_16K = 16384
} zfs_dnsize_type_t;

typedef enum {
	ZFS_REDUNDANT_METADATA_ALL,
	ZFS_REDUNDANT_METADATA_MOST
} zfs_redundant_metadata_type_t;

/*
 * On-disk version number.
 */
#define	SPA_VERSION_1			1ULL
#define	SPA_VERSION_2			2ULL
#define	SPA_VERSION_3			3ULL
#define	SPA_VERSION_4			4ULL
#define	SPA_VERSION_5			5ULL
#define	SPA_VERSION_6			6ULL
#define	SPA_VERSION_7			7ULL
#define	SPA_VERSION_8			8ULL
#define	SPA_VERSION_9			9ULL
#define	SPA_VERSION_10			10ULL
#define	SPA_VERSION_11			11ULL
#define	SPA_VERSION_12			12ULL
#define	SPA_VERSION_13			13ULL
#define	SPA_VERSION_14			14ULL
#define	SPA_VERSION_15			15ULL
#define	SPA_VERSION_16			16ULL
#define	SPA_VERSION_17			17ULL
#define	SPA_VERSION_18			18ULL
#define	SPA_VERSION_19			19ULL
#define	SPA_VERSION_20			20ULL
#define	SPA_VERSION_21			21ULL
#define	SPA_VERSION_22			22ULL
#define	SPA_VERSION_23			23ULL
#define	SPA_VERSION_24			24ULL
#define	SPA_VERSION_25			25ULL
#define	SPA_VERSION_26			26ULL
#define	SPA_VERSION_27			27ULL
#define	SPA_VERSION_28			28ULL
#define	SPA_VERSION_5000		5000ULL

/*
 * When bumping up SPA_VERSION, make sure GRUB ZFS understands the on-disk
 * format change. Go to usr/src/grub/grub-0.97/stage2/{zfs-include/, fsys_zfs*},
 * and do the appropriate changes.  Also bump the version number in
 * usr/src/grub/capability.
 */
#define	SPA_VERSION			SPA_VERSION_5000
#define	SPA_VERSION_STRING		"5000"

/*
 * Symbolic names for the changes that caused a SPA_VERSION switch.
 * Used in the code when checking for presence or absence of a feature.
 * Feel free to define multiple symbolic names for each version if there
 * were multiple changes to on-disk structures during that version.
 *
 * NOTE: When checking the current SPA_VERSION in your code, be sure
 *       to use spa_version() since it reports the version of the
 *       last synced uberblock.  Checking the in-flight version can
 *       be dangerous in some cases.
 */
#define	SPA_VERSION_INITIAL		SPA_VERSION_1
#define	SPA_VERSION_DITTO_BLOCKS	SPA_VERSION_2
#define	SPA_VERSION_SPARES		SPA_VERSION_3
#define	SPA_VERSION_RAIDZ2		SPA_VERSION_3
#define	SPA_VERSION_BPOBJ_ACCOUNT	SPA_VERSION_3
#define	SPA_VERSION_RAIDZ_DEFLATE	SPA_VERSION_3
#define	SPA_VERSION_DNODE_BYTES		SPA_VERSION_3
#define	SPA_VERSION_ZPOOL_HISTORY	SPA_VERSION_4
#define	SPA_VERSION_GZIP_COMPRESSION	SPA_VERSION_5
#define	SPA_VERSION_BOOTFS		SPA_VERSION_6
#define	SPA_VERSION_SLOGS		SPA_VERSION_7
#define	SPA_VERSION_DELEGATED_PERMS	SPA_VERSION_8
#define	SPA_VERSION_FUID		SPA_VERSION_9
#define	SPA_VERSION_REFRESERVATION	SPA_VERSION_9
#define	SPA_VERSION_REFQUOTA		SPA_VERSION_9
#define	SPA_VERSION_UNIQUE_ACCURATE	SPA_VERSION_9
#define	SPA_VERSION_L2CACHE		SPA_VERSION_10
#define	SPA_VERSION_NEXT_CLONES		SPA_VERSION_11
#define	SPA_VERSION_ORIGIN		SPA_VERSION_11
#define	SPA_VERSION_DSL_SCRUB		SPA_VERSION_11
#define	SPA_VERSION_SNAP_PROPS		SPA_VERSION_12
#define	SPA_VERSION_USED_BREAKDOWN	SPA_VERSION_13
#define	SPA_VERSION_PASSTHROUGH_X	SPA_VERSION_14
#define	SPA_VERSION_USERSPACE		SPA_VERSION_15
#define	SPA_VERSION_STMF_PROP		SPA_VERSION_16
#define	SPA_VERSION_RAIDZ3		SPA_VERSION_17
#define	SPA_VERSION_USERREFS		SPA_VERSION_18
#define	SPA_VERSION_HOLES		SPA_VERSION_19
#define	SPA_VERSION_ZLE_COMPRESSION	SPA_VERSION_20
#define	SPA_VERSION_DEDUP		SPA_VERSION_21
#define	SPA_VERSION_RECVD_PROPS		SPA_VERSION_22
#define	SPA_VERSION_SLIM_ZIL		SPA_VERSION_23
#define	SPA_VERSION_SA			SPA_VERSION_24
#define	SPA_VERSION_SCAN		SPA_VERSION_25
#define	SPA_VERSION_DIR_CLONES		SPA_VERSION_26
#define	SPA_VERSION_DEADLISTS		SPA_VERSION_26
#define	SPA_VERSION_FAST_SNAP		SPA_VERSION_27
#define	SPA_VERSION_MULTI_REPLACE	SPA_VERSION_28
#define	SPA_VERSION_BEFORE_FEATURES	SPA_VERSION_28
#define	SPA_VERSION_FEATURES		SPA_VERSION_5000

#define	SPA_VERSION_IS_SUPPORTED(v) \
	(((v) >= SPA_VERSION_INITIAL && (v) <= SPA_VERSION_BEFORE_FEATURES) || \
	((v) >= SPA_VERSION_FEATURES && (v) <= SPA_VERSION))

/*
 * ZPL version - rev'd whenever an incompatible on-disk format change
 * occurs.  This is independent of SPA/DMU/ZAP versioning.  You must
 * also update the version_table[] and help message in zfs_prop.c.
 *
 * When changing, be sure to teach GRUB how to read the new format!
 * See usr/src/grub/grub-0.97/stage2/{zfs-include/,fsys_zfs*}
 */
#define	ZPL_VERSION_1			1ULL
#define	ZPL_VERSION_2			2ULL
#define	ZPL_VERSION_3			3ULL
#define	ZPL_VERSION_4			4ULL
#define	ZPL_VERSION_5			5ULL
#define	ZPL_VERSION			ZPL_VERSION_5
#define	ZPL_VERSION_STRING		"5"

#define	ZPL_VERSION_INITIAL		ZPL_VERSION_1
#define	ZPL_VERSION_DIRENT_TYPE		ZPL_VERSION_2
#define	ZPL_VERSION_FUID		ZPL_VERSION_3
#define	ZPL_VERSION_NORMALIZATION	ZPL_VERSION_3
#define	ZPL_VERSION_SYSATTR		ZPL_VERSION_3
#define	ZPL_VERSION_USERSPACE		ZPL_VERSION_4
#define	ZPL_VERSION_SA			ZPL_VERSION_5

/* Rewind request information */
#define	ZPOOL_NO_REWIND		1  /* No policy - default behavior */
#define	ZPOOL_NEVER_REWIND	2  /* Do not search for best txg or rewind */
#define	ZPOOL_TRY_REWIND	4  /* Search for best txg, but do not rewind */
#define	ZPOOL_DO_REWIND		8  /* Rewind to best txg w/in deferred frees */
#define	ZPOOL_EXTREME_REWIND	16 /* Allow extreme measures to find best txg */
#define	ZPOOL_REWIND_MASK	28 /* All the possible rewind bits */
#define	ZPOOL_REWIND_POLICIES	31 /* All the possible policy bits */

typedef struct zpool_rewind_policy {
	uint32_t	zrp_request;	/* rewind behavior requested */
	uint64_t	zrp_maxmeta;	/* max acceptable meta-data errors */
	uint64_t	zrp_maxdata;	/* max acceptable data errors */
	uint64_t	zrp_txg;	/* specific txg to load */
} zpool_rewind_policy_t;

/*
 * The following are configuration names used in the nvlist describing a pool's
 * configuration.
 */
#define	ZPOOL_CONFIG_VERSION		"version"
#define	ZPOOL_CONFIG_POOL_NAME		"name"
#define	ZPOOL_CONFIG_POOL_STATE		"state"
#define	ZPOOL_CONFIG_POOL_TXG		"txg"
#define	ZPOOL_CONFIG_POOL_GUID		"pool_guid"
#define	ZPOOL_CONFIG_CREATE_TXG		"create_txg"
#define	ZPOOL_CONFIG_TOP_GUID		"top_guid"
#define	ZPOOL_CONFIG_VDEV_TREE		"vdev_tree"
#define	ZPOOL_CONFIG_TYPE		"type"
#define	ZPOOL_CONFIG_CHILDREN		"children"
#define	ZPOOL_CONFIG_ID			"id"
#define	ZPOOL_CONFIG_GUID		"guid"
#define	ZPOOL_CONFIG_PATH		"path"
#define	ZPOOL_CONFIG_DEVID		"devid"
#define	ZPOOL_CONFIG_METASLAB_ARRAY	"metaslab_array"
#define	ZPOOL_CONFIG_METASLAB_SHIFT	"metaslab_shift"
#define	ZPOOL_CONFIG_ASHIFT		"ashift"
#define	ZPOOL_CONFIG_ASIZE		"asize"
#define	ZPOOL_CONFIG_DTL		"DTL"
#define	ZPOOL_CONFIG_SCAN_STATS		"scan_stats"	/* not stored on disk */
#define	ZPOOL_CONFIG_VDEV_STATS		"vdev_stats"	/* not stored on disk */

/* container nvlist of extended stats */
#define	ZPOOL_CONFIG_VDEV_STATS_EX	"vdev_stats_ex"

/* Active queue read/write stats */
#define	ZPOOL_CONFIG_VDEV_SYNC_R_ACTIVE_QUEUE	"vdev_sync_r_active_queue"
#define	ZPOOL_CONFIG_VDEV_SYNC_W_ACTIVE_QUEUE	"vdev_sync_w_active_queue"
#define	ZPOOL_CONFIG_VDEV_ASYNC_R_ACTIVE_QUEUE	"vdev_async_r_active_queue"
#define	ZPOOL_CONFIG_VDEV_ASYNC_W_ACTIVE_QUEUE	"vdev_async_w_active_queue"
#define	ZPOOL_CONFIG_VDEV_SCRUB_ACTIVE_QUEUE	"vdev_async_scrub_active_queue"

/* Queue sizes */
#define	ZPOOL_CONFIG_VDEV_SYNC_R_PEND_QUEUE	"vdev_sync_r_pend_queue"
#define	ZPOOL_CONFIG_VDEV_SYNC_W_PEND_QUEUE	"vdev_sync_w_pend_queue"
#define	ZPOOL_CONFIG_VDEV_ASYNC_R_PEND_QUEUE	"vdev_async_r_pend_queue"
#define	ZPOOL_CONFIG_VDEV_ASYNC_W_PEND_QUEUE	"vdev_async_w_pend_queue"
#define	ZPOOL_CONFIG_VDEV_SCRUB_PEND_QUEUE	"vdev_async_scrub_pend_queue"

/* Latency read/write histogram stats */
#define	ZPOOL_CONFIG_VDEV_TOT_R_LAT_HISTO	"vdev_tot_r_lat_histo"
#define	ZPOOL_CONFIG_VDEV_TOT_W_LAT_HISTO	"vdev_tot_w_lat_histo"
#define	ZPOOL_CONFIG_VDEV_DISK_R_LAT_HISTO	"vdev_disk_r_lat_histo"
#define	ZPOOL_CONFIG_VDEV_DISK_W_LAT_HISTO	"vdev_disk_w_lat_histo"
#define	ZPOOL_CONFIG_VDEV_SYNC_R_LAT_HISTO	"vdev_sync_r_lat_histo"
#define	ZPOOL_CONFIG_VDEV_SYNC_W_LAT_HISTO	"vdev_sync_w_lat_histo"
#define	ZPOOL_CONFIG_VDEV_ASYNC_R_LAT_HISTO	"vdev_async_r_lat_histo"
#define	ZPOOL_CONFIG_VDEV_ASYNC_W_LAT_HISTO	"vdev_async_w_lat_histo"
#define	ZPOOL_CONFIG_VDEV_SCRUB_LAT_HISTO	"vdev_scrub_histo"

/* Request size histograms */
#define	ZPOOL_CONFIG_VDEV_SYNC_IND_R_HISTO	"vdev_sync_ind_r_histo"
#define	ZPOOL_CONFIG_VDEV_SYNC_IND_W_HISTO	"vdev_sync_ind_w_histo"
#define	ZPOOL_CONFIG_VDEV_ASYNC_IND_R_HISTO	"vdev_async_ind_r_histo"
#define	ZPOOL_CONFIG_VDEV_ASYNC_IND_W_HISTO	"vdev_async_ind_w_histo"
#define	ZPOOL_CONFIG_VDEV_IND_SCRUB_HISTO	"vdev_ind_scrub_histo"
#define	ZPOOL_CONFIG_VDEV_SYNC_AGG_R_HISTO	"vdev_sync_agg_r_histo"
#define	ZPOOL_CONFIG_VDEV_SYNC_AGG_W_HISTO	"vdev_sync_agg_w_histo"
#define	ZPOOL_CONFIG_VDEV_ASYNC_AGG_R_HISTO	"vdev_async_agg_r_histo"
#define	ZPOOL_CONFIG_VDEV_ASYNC_AGG_W_HISTO	"vdev_async_agg_w_histo"
#define	ZPOOL_CONFIG_VDEV_AGG_SCRUB_HISTO	"vdev_agg_scrub_histo"

/* vdev enclosure sysfs path */
#define	ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH	"vdev_enc_sysfs_path"

#define	ZPOOL_CONFIG_WHOLE_DISK		"whole_disk"
#define	ZPOOL_CONFIG_ERRCOUNT		"error_count"
#define	ZPOOL_CONFIG_NOT_PRESENT	"not_present"
#define	ZPOOL_CONFIG_SPARES		"spares"
#define	ZPOOL_CONFIG_IS_SPARE		"is_spare"
#define	ZPOOL_CONFIG_NPARITY		"nparity"
#define	ZPOOL_CONFIG_HOSTID		"hostid"
#define	ZPOOL_CONFIG_HOSTNAME		"hostname"
#define	ZPOOL_CONFIG_LOADED_TIME	"initial_load_time"
#define	ZPOOL_CONFIG_UNSPARE		"unspare"
#define	ZPOOL_CONFIG_PHYS_PATH		"phys_path"
#define	ZPOOL_CONFIG_IS_LOG		"is_log"
#define	ZPOOL_CONFIG_L2CACHE		"l2cache"
#define	ZPOOL_CONFIG_HOLE_ARRAY		"hole_array"
#define	ZPOOL_CONFIG_VDEV_CHILDREN	"vdev_children"
#define	ZPOOL_CONFIG_IS_HOLE		"is_hole"
#define	ZPOOL_CONFIG_DDT_HISTOGRAM	"ddt_histogram"
#define	ZPOOL_CONFIG_DDT_OBJ_STATS	"ddt_object_stats"
#define	ZPOOL_CONFIG_DDT_STATS		"ddt_stats"
#define	ZPOOL_CONFIG_SPLIT		"splitcfg"
#define	ZPOOL_CONFIG_ORIG_GUID		"orig_guid"
#define	ZPOOL_CONFIG_SPLIT_GUID		"split_guid"
#define	ZPOOL_CONFIG_SPLIT_LIST		"guid_list"
#define	ZPOOL_CONFIG_REMOVING		"removing"
#define	ZPOOL_CONFIG_RESILVER_TXG	"resilver_txg"
#define	ZPOOL_CONFIG_COMMENT		"comment"
#define	ZPOOL_CONFIG_SUSPENDED		"suspended"	/* not stored on disk */
#define	ZPOOL_CONFIG_TIMESTAMP		"timestamp"	/* not stored on disk */
#define	ZPOOL_CONFIG_BOOTFS		"bootfs"	/* not stored on disk */
#define	ZPOOL_CONFIG_MISSING_DEVICES	"missing_vdevs"	/* not stored on disk */
#define	ZPOOL_CONFIG_LOAD_INFO		"load_info"	/* not stored on disk */
#define	ZPOOL_CONFIG_REWIND_INFO	"rewind_info"	/* not stored on disk */
#define	ZPOOL_CONFIG_UNSUP_FEAT		"unsup_feat"	/* not stored on disk */
#define	ZPOOL_CONFIG_ENABLED_FEAT	"enabled_feat"	/* not stored on disk */
#define	ZPOOL_CONFIG_CAN_RDONLY		"can_rdonly"	/* not stored on disk */
#define	ZPOOL_CONFIG_FEATURES_FOR_READ	"features_for_read"
#define	ZPOOL_CONFIG_FEATURE_STATS	"feature_stats"	/* not stored on disk */
#define	ZPOOL_CONFIG_ERRATA		"errata"	/* not stored on disk */
#define	ZPOOL_CONFIG_VDEV_TOP_ZAP	"com.delphix:vdev_zap_top"
#define	ZPOOL_CONFIG_VDEV_LEAF_ZAP	"com.delphix:vdev_zap_leaf"
#define	ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS	"com.delphix:has_per_vdev_zaps"
/*
 * The persistent vdev state is stored as separate values rather than a single
 * 'vdev_state' entry.  This is because a device can be in multiple states, such
 * as offline and degraded.
 */
#define	ZPOOL_CONFIG_OFFLINE		"offline"
#define	ZPOOL_CONFIG_FAULTED		"faulted"
#define	ZPOOL_CONFIG_DEGRADED		"degraded"
#define	ZPOOL_CONFIG_REMOVED		"removed"
#define	ZPOOL_CONFIG_FRU		"fru"
#define	ZPOOL_CONFIG_AUX_STATE		"aux_state"

/* Rewind policy parameters */
#define	ZPOOL_REWIND_POLICY		"rewind-policy"
#define	ZPOOL_REWIND_REQUEST		"rewind-request"
#define	ZPOOL_REWIND_REQUEST_TXG	"rewind-request-txg"
#define	ZPOOL_REWIND_META_THRESH	"rewind-meta-thresh"
#define	ZPOOL_REWIND_DATA_THRESH	"rewind-data-thresh"

/* Rewind data discovered */
#define	ZPOOL_CONFIG_LOAD_TIME		"rewind_txg_ts"
#define	ZPOOL_CONFIG_LOAD_DATA_ERRORS	"verify_data_errors"
#define	ZPOOL_CONFIG_REWIND_TIME	"seconds_of_rewind"

#define	VDEV_TYPE_ROOT			"root"
#define	VDEV_TYPE_MIRROR		"mirror"
#define	VDEV_TYPE_REPLACING		"replacing"
#define	VDEV_TYPE_RAIDZ			"raidz"
#define	VDEV_TYPE_DISK			"disk"
#define	VDEV_TYPE_FILE			"file"
#define	VDEV_TYPE_MISSING		"missing"
#define	VDEV_TYPE_HOLE			"hole"
#define	VDEV_TYPE_SPARE			"spare"
#define	VDEV_TYPE_LOG			"log"
#define	VDEV_TYPE_L2CACHE		"l2cache"

/*
 * This is needed in userland to report the minimum necessary device size.
 */
#define	SPA_MINDEVSIZE		(64ULL << 20)

/*
 * Set if the fragmentation has not yet been calculated. This can happen
 * because the space maps have not been upgraded or the histogram feature
 * is not enabled.
 */
#define	ZFS_FRAG_INVALID	UINT64_MAX

/*
 * The location of the pool configuration repository, shared between kernel and
 * userland.
 */
#define	ZPOOL_CACHE		"/etc/zfs/zpool.cache"

/*
 * vdev states are ordered from least to most healthy.
 * A vdev that's CANT_OPEN or below is considered unusable.
 */
typedef enum vdev_state {
	VDEV_STATE_UNKNOWN = 0,	/* Uninitialized vdev			*/
	VDEV_STATE_CLOSED,	/* Not currently open			*/
	VDEV_STATE_OFFLINE,	/* Not allowed to open			*/
	VDEV_STATE_REMOVED,	/* Explicitly removed from system	*/
	VDEV_STATE_CANT_OPEN,	/* Tried to open, but failed		*/
	VDEV_STATE_FAULTED,	/* External request to fault device	*/
	VDEV_STATE_DEGRADED,	/* Replicated vdev with unhealthy kids	*/
	VDEV_STATE_HEALTHY	/* Presumed good			*/
} vdev_state_t;

#define	VDEV_STATE_ONLINE	VDEV_STATE_HEALTHY

/*
 * vdev aux states.  When a vdev is in the CANT_OPEN state, the aux field
 * of the vdev stats structure uses these constants to distinguish why.
 */
typedef enum vdev_aux {
	VDEV_AUX_NONE,		/* no error				*/
	VDEV_AUX_OPEN_FAILED,	/* ldi_open_*() or vn_open() failed	*/
	VDEV_AUX_CORRUPT_DATA,	/* bad label or disk contents		*/
	VDEV_AUX_NO_REPLICAS,	/* insufficient number of replicas	*/
	VDEV_AUX_BAD_GUID_SUM,	/* vdev guid sum doesn't match		*/
	VDEV_AUX_TOO_SMALL,	/* vdev size is too small		*/
	VDEV_AUX_BAD_LABEL,	/* the label is OK but invalid		*/
	VDEV_AUX_VERSION_NEWER,	/* on-disk version is too new		*/
	VDEV_AUX_VERSION_OLDER,	/* on-disk version is too old		*/
	VDEV_AUX_UNSUP_FEAT,	/* unsupported features			*/
	VDEV_AUX_SPARED,	/* hot spare used in another pool	*/
	VDEV_AUX_ERR_EXCEEDED,	/* too many errors			*/
	VDEV_AUX_IO_FAILURE,	/* experienced I/O failure		*/
	VDEV_AUX_BAD_LOG,	/* cannot read log chain(s)		*/
	VDEV_AUX_EXTERNAL,	/* external diagnosis			*/
	VDEV_AUX_SPLIT_POOL	/* vdev was split off into another pool	*/
} vdev_aux_t;

/*
 * pool state.  The following states are written to disk as part of the normal
 * SPA lifecycle: ACTIVE, EXPORTED, DESTROYED, SPARE, L2CACHE.  The remaining
 * states are software abstractions used at various levels to communicate
 * pool state.
 */
typedef enum pool_state {
	POOL_STATE_ACTIVE = 0,		/* In active use		*/
	POOL_STATE_EXPORTED,		/* Explicitly exported		*/
	POOL_STATE_DESTROYED,		/* Explicitly destroyed		*/
	POOL_STATE_SPARE,		/* Reserved for hot spare use	*/
	POOL_STATE_L2CACHE,		/* Level 2 ARC device		*/
	POOL_STATE_UNINITIALIZED,	/* Internal spa_t state		*/
	POOL_STATE_UNAVAIL,		/* Internal libzfs state	*/
	POOL_STATE_POTENTIALLY_ACTIVE	/* Internal libzfs state	*/
} pool_state_t;

/*
 * Scan Functions.
 */
typedef enum pool_scan_func {
	POOL_SCAN_NONE,
	POOL_SCAN_SCRUB,
	POOL_SCAN_RESILVER,
	POOL_SCAN_FUNCS
} pool_scan_func_t;

/*
 * ZIO types.  Needed to interpret vdev statistics below.
 */
typedef enum zio_type {
	ZIO_TYPE_NULL = 0,
	ZIO_TYPE_READ,
	ZIO_TYPE_WRITE,
	ZIO_TYPE_FREE,
	ZIO_TYPE_CLAIM,
	ZIO_TYPE_IOCTL,
	ZIO_TYPES
} zio_type_t;

/*
 * Pool statistics.  Note: all fields should be 64-bit because this
 * is passed between kernel and userland as an nvlist uint64 array.
 */
typedef struct pool_scan_stat {
	/* values stored on disk */
	uint64_t	pss_func;	/* pool_scan_func_t */
	uint64_t	pss_state;	/* dsl_scan_state_t */
	uint64_t	pss_start_time;	/* scan start time */
	uint64_t	pss_end_time;	/* scan end time */
	uint64_t	pss_to_examine;	/* total bytes to scan */
	uint64_t	pss_examined;	/* total examined bytes	*/
	uint64_t	pss_to_process; /* total bytes to process */
	uint64_t	pss_processed;	/* total processed bytes */
	uint64_t	pss_errors;	/* scan errors	*/

	/* values not stored on disk */
	uint64_t	pss_pass_exam;	/* examined bytes per scan pass */
	uint64_t	pss_pass_start;	/* start time of a scan pass */
} pool_scan_stat_t;

typedef enum dsl_scan_state {
	DSS_NONE,
	DSS_SCANNING,
	DSS_FINISHED,
	DSS_CANCELED,
	DSS_NUM_STATES
} dsl_scan_state_t;

/*
 * Errata described by http://zfsonlinux.org/msg/ZFS-8000-ER.  The ordering
 * of this enum must be maintained to ensure the errata identifiers map to
 * the correct documentation.  New errata may only be appended to the list
 * and must contain corresponding documentation at the above link.
 */
typedef enum zpool_errata {
	ZPOOL_ERRATA_NONE,
	ZPOOL_ERRATA_ZOL_2094_SCRUB,
	ZPOOL_ERRATA_ZOL_2094_ASYNC_DESTROY,
} zpool_errata_t;

/*
 * Vdev statistics.  Note: all fields should be 64-bit because this
 * is passed between kernel and userland as an nvlist uint64 array.
 */
typedef struct vdev_stat {
	hrtime_t	vs_timestamp;		/* time since vdev load	*/
	uint64_t	vs_state;		/* vdev state		*/
	uint64_t	vs_aux;			/* see vdev_aux_t	*/
	uint64_t	vs_alloc;		/* space allocated	*/
	uint64_t	vs_space;		/* total capacity	*/
	uint64_t	vs_dspace;		/* deflated capacity	*/
	uint64_t	vs_rsize;		/* replaceable dev size */
	uint64_t	vs_esize;		/* expandable dev size */
	uint64_t	vs_ops[ZIO_TYPES];	/* operation count	*/
	uint64_t	vs_bytes[ZIO_TYPES];	/* bytes read/written	*/
	uint64_t	vs_read_errors;		/* read errors		*/
	uint64_t	vs_write_errors;	/* write errors		*/
	uint64_t	vs_checksum_errors;	/* checksum errors	*/
	uint64_t	vs_self_healed;		/* self-healed bytes	*/
	uint64_t	vs_scan_removing;	/* removing?	*/
	uint64_t	vs_scan_processed;	/* scan processed bytes	*/
	uint64_t	vs_fragmentation;	/* device fragmentation */

} vdev_stat_t;

/*
 * Extended stats
 *
 * These are stats which aren't included in the original iostat output.  For
 * convenience, they are grouped together in vdev_stat_ex, although each stat
 * is individually exported as an nvlist.
 */
typedef struct vdev_stat_ex {
	/* Number of ZIOs issued to disk and waiting to finish */
	uint64_t vsx_active_queue[ZIO_PRIORITY_NUM_QUEUEABLE];

	/* Number of ZIOs pending to be issued to disk */
	uint64_t vsx_pend_queue[ZIO_PRIORITY_NUM_QUEUEABLE];

	/*
	 * Below are the histograms for various latencies. Buckets are in
	 * units of nanoseconds.
	 */

	/*
	 * 2^37 nanoseconds = 134s. Timeouts will probably start kicking in
	 * before this.
	 */
#define	VDEV_L_HISTO_BUCKETS 37		/* Latency histo buckets */
#define	VDEV_RQ_HISTO_BUCKETS 25	/* Request size histo buckets */


	/* Amount of time in ZIO queue (ns) */
	uint64_t vsx_queue_histo[ZIO_PRIORITY_NUM_QUEUEABLE]
	    [VDEV_L_HISTO_BUCKETS];

	/* Total ZIO latency (ns).  Includes queuing and disk access time */
	uint64_t vsx_total_histo[ZIO_TYPES][VDEV_L_HISTO_BUCKETS];

	/* Amount of time to read/write the disk (ns) */
	uint64_t vsx_disk_histo[ZIO_TYPES][VDEV_L_HISTO_BUCKETS];

	/* "lookup the bucket for a value" histogram macros */
#define	HISTO(val, buckets) (val != 0 ? MIN(highbit64(val) - 1, \
	    buckets - 1) : 0)
#define	L_HISTO(a) HISTO(a, VDEV_L_HISTO_BUCKETS)
#define	RQ_HISTO(a) HISTO(a, VDEV_RQ_HISTO_BUCKETS)

	/* Physical IO histogram */
	uint64_t vsx_ind_histo[ZIO_PRIORITY_NUM_QUEUEABLE]
	    [VDEV_RQ_HISTO_BUCKETS];

	/* Delegated (aggregated) physical IO histogram */
	uint64_t vsx_agg_histo[ZIO_PRIORITY_NUM_QUEUEABLE]
	    [VDEV_RQ_HISTO_BUCKETS];

} vdev_stat_ex_t;

/*
 * DDT statistics.  Note: all fields should be 64-bit because this
 * is passed between kernel and userland as an nvlist uint64 array.
 */
typedef struct ddt_object {
	uint64_t	ddo_count;	/* number of elements in ddt 	*/
	uint64_t	ddo_dspace;	/* size of ddt on disk		*/
	uint64_t	ddo_mspace;	/* size of ddt in-core		*/
} ddt_object_t;

typedef struct ddt_stat {
	uint64_t	dds_blocks;	/* blocks			*/
	uint64_t	dds_lsize;	/* logical size			*/
	uint64_t	dds_psize;	/* physical size		*/
	uint64_t	dds_dsize;	/* deflated allocated size	*/
	uint64_t	dds_ref_blocks;	/* referenced blocks		*/
	uint64_t	dds_ref_lsize;	/* referenced lsize * refcnt	*/
	uint64_t	dds_ref_psize;	/* referenced psize * refcnt	*/
	uint64_t	dds_ref_dsize;	/* referenced dsize * refcnt	*/
} ddt_stat_t;

typedef struct ddt_histogram {
	ddt_stat_t	ddh_stat[64];	/* power-of-two histogram buckets */
} ddt_histogram_t;

#define	ZVOL_DRIVER	"zvol"
#define	ZFS_DRIVER	"zfs"
#define	ZFS_DEV		"/dev/zfs"
#define	ZFS_SHARETAB	"/etc/dfs/sharetab"

/* general zvol path */
#define	ZVOL_DIR	"/dev"

#define	ZVOL_MAJOR		230
#define	ZVOL_MINOR_BITS		4
#define	ZVOL_MINOR_MASK		((1U << ZVOL_MINOR_BITS) - 1)
#define	ZVOL_MINORS		(1 << 4)
#define	ZVOL_DEV_NAME		"zd"

#define	ZVOL_PROP_NAME		"name"
#define	ZVOL_DEFAULT_BLOCKSIZE	8192

/*
 * /dev/zfs ioctl numbers.
 */
typedef enum zfs_ioc {
	/*
	 * Illumos - 71/128 numbers reserved.
	 */
	ZFS_IOC_FIRST =	('Z' << 8),
	ZFS_IOC = ZFS_IOC_FIRST,
	ZFS_IOC_POOL_CREATE = ZFS_IOC_FIRST,
	ZFS_IOC_POOL_DESTROY,
	ZFS_IOC_POOL_IMPORT,
	ZFS_IOC_POOL_EXPORT,
	ZFS_IOC_POOL_CONFIGS,
	ZFS_IOC_POOL_STATS,
	ZFS_IOC_POOL_TRYIMPORT,
	ZFS_IOC_POOL_SCAN,
	ZFS_IOC_POOL_FREEZE,
	ZFS_IOC_POOL_UPGRADE,
	ZFS_IOC_POOL_GET_HISTORY,
	ZFS_IOC_VDEV_ADD,
	ZFS_IOC_VDEV_REMOVE,
	ZFS_IOC_VDEV_SET_STATE,
	ZFS_IOC_VDEV_ATTACH,
	ZFS_IOC_VDEV_DETACH,
	ZFS_IOC_VDEV_SETPATH,
	ZFS_IOC_VDEV_SETFRU,
	ZFS_IOC_OBJSET_STATS,
	ZFS_IOC_OBJSET_ZPLPROPS,
	ZFS_IOC_DATASET_LIST_NEXT,
	ZFS_IOC_SNAPSHOT_LIST_NEXT,
	ZFS_IOC_SET_PROP,
	ZFS_IOC_CREATE,
	ZFS_IOC_DESTROY,
	ZFS_IOC_ROLLBACK,
	ZFS_IOC_RENAME,
	ZFS_IOC_RECV,
	ZFS_IOC_SEND,
	ZFS_IOC_INJECT_FAULT,
	ZFS_IOC_CLEAR_FAULT,
	ZFS_IOC_INJECT_LIST_NEXT,
	ZFS_IOC_ERROR_LOG,
	ZFS_IOC_CLEAR,
	ZFS_IOC_PROMOTE,
	ZFS_IOC_SNAPSHOT,
	ZFS_IOC_DSOBJ_TO_DSNAME,
	ZFS_IOC_OBJ_TO_PATH,
	ZFS_IOC_POOL_SET_PROPS,
	ZFS_IOC_POOL_GET_PROPS,
	ZFS_IOC_SET_FSACL,
	ZFS_IOC_GET_FSACL,
	ZFS_IOC_SHARE,
	ZFS_IOC_INHERIT_PROP,
	ZFS_IOC_SMB_ACL,
	ZFS_IOC_USERSPACE_ONE,
	ZFS_IOC_USERSPACE_MANY,
	ZFS_IOC_USERSPACE_UPGRADE,
	ZFS_IOC_HOLD,
	ZFS_IOC_RELEASE,
	ZFS_IOC_GET_HOLDS,
	ZFS_IOC_OBJSET_RECVD_PROPS,
	ZFS_IOC_VDEV_SPLIT,
	ZFS_IOC_NEXT_OBJ,
	ZFS_IOC_DIFF,
	ZFS_IOC_TMP_SNAPSHOT,
	ZFS_IOC_OBJ_TO_STATS,
	ZFS_IOC_SPACE_WRITTEN,
	ZFS_IOC_SPACE_SNAPS,
	ZFS_IOC_DESTROY_SNAPS,
	ZFS_IOC_POOL_REGUID,
	ZFS_IOC_POOL_REOPEN,
	ZFS_IOC_SEND_PROGRESS,
	ZFS_IOC_LOG_HISTORY,
	ZFS_IOC_SEND_NEW,
	ZFS_IOC_SEND_SPACE,
	ZFS_IOC_CLONE,
	ZFS_IOC_BOOKMARK,
	ZFS_IOC_GET_BOOKMARKS,
	ZFS_IOC_DESTROY_BOOKMARKS,
	ZFS_IOC_RECV_NEW,

	/*
	 * Linux - 3/64 numbers reserved.
	 */
	ZFS_IOC_LINUX = ('Z' << 8) + 0x80,
	ZFS_IOC_EVENTS_NEXT,
	ZFS_IOC_EVENTS_CLEAR,
	ZFS_IOC_EVENTS_SEEK,

	/*
	 * FreeBSD - 1/64 numbers reserved.
	 */
	ZFS_IOC_FREEBSD = ('Z' << 8) + 0xC0,

	ZFS_IOC_LAST
} zfs_ioc_t;

/*
 * zvol ioctl to get dataset name
 */
#define	BLKZNAME		_IOR(0x12, 125, char[ZFS_MAX_DATASET_NAME_LEN])

/*
 * Internal SPA load state.  Used by FMA diagnosis engine.
 */
typedef enum {
	SPA_LOAD_NONE,		/* no load in progress	*/
	SPA_LOAD_OPEN,		/* normal open		*/
	SPA_LOAD_IMPORT,	/* import in progress	*/
	SPA_LOAD_TRYIMPORT,	/* tryimport in progress */
	SPA_LOAD_RECOVER,	/* recovery requested	*/
	SPA_LOAD_ERROR,		/* load failed		*/
	SPA_LOAD_CREATE		/* creation in progress */
} spa_load_state_t;

/*
 * Bookmark name values.
 */
#define	ZPOOL_ERR_LIST		"error list"
#define	ZPOOL_ERR_DATASET	"dataset"
#define	ZPOOL_ERR_OBJECT	"object"

#define	HIS_MAX_RECORD_LEN	(MAXPATHLEN + MAXPATHLEN + 1)

/*
 * The following are names used in the nvlist describing
 * the pool's history log.
 */
#define	ZPOOL_HIST_RECORD	"history record"
#define	ZPOOL_HIST_TIME		"history time"
#define	ZPOOL_HIST_CMD		"history command"
#define	ZPOOL_HIST_WHO		"history who"
#define	ZPOOL_HIST_ZONE		"history zone"
#define	ZPOOL_HIST_HOST		"history hostname"
#define	ZPOOL_HIST_TXG		"history txg"
#define	ZPOOL_HIST_INT_EVENT	"history internal event"
#define	ZPOOL_HIST_INT_STR	"history internal str"
#define	ZPOOL_HIST_INT_NAME	"internal_name"
#define	ZPOOL_HIST_IOCTL	"ioctl"
#define	ZPOOL_HIST_INPUT_NVL	"in_nvl"
#define	ZPOOL_HIST_OUTPUT_NVL	"out_nvl"
#define	ZPOOL_HIST_DSNAME	"dsname"
#define	ZPOOL_HIST_DSID		"dsid"

/*
 * Flags for ZFS_IOC_VDEV_SET_STATE
 */
#define	ZFS_ONLINE_CHECKREMOVE	0x1
#define	ZFS_ONLINE_UNSPARE	0x2
#define	ZFS_ONLINE_FORCEFAULT	0x4
#define	ZFS_ONLINE_EXPAND	0x8
#define	ZFS_OFFLINE_TEMPORARY	0x1

/*
 * Flags for ZFS_IOC_POOL_IMPORT
 */
#define	ZFS_IMPORT_NORMAL	0x0
#define	ZFS_IMPORT_VERBATIM	0x1
#define	ZFS_IMPORT_ANY_HOST	0x2
#define	ZFS_IMPORT_MISSING_LOG	0x4
#define	ZFS_IMPORT_ONLY		0x8
#define	ZFS_IMPORT_TEMP_NAME	0x10

/*
 * Sysevent payload members.  ZFS will generate the following sysevents with the
 * given payloads:
 *
 *	ESC_ZFS_RESILVER_START
 *	ESC_ZFS_RESILVER_END
 *	ESC_ZFS_POOL_DESTROY
 *	ESC_ZFS_POOL_REGUID
 *
 *		ZFS_EV_POOL_NAME	DATA_TYPE_STRING
 *		ZFS_EV_POOL_GUID	DATA_TYPE_UINT64
 *
 *	ESC_ZFS_VDEV_REMOVE
 *	ESC_ZFS_VDEV_CLEAR
 *	ESC_ZFS_VDEV_CHECK
 *
 *		ZFS_EV_POOL_NAME	DATA_TYPE_STRING
 *		ZFS_EV_POOL_GUID	DATA_TYPE_UINT64
 *		ZFS_EV_VDEV_PATH	DATA_TYPE_STRING	(optional)
 *		ZFS_EV_VDEV_GUID	DATA_TYPE_UINT64
 */
#define	ZFS_EV_POOL_NAME	"pool_name"
#define	ZFS_EV_POOL_GUID	"pool_guid"
#define	ZFS_EV_VDEV_PATH	"vdev_path"
#define	ZFS_EV_VDEV_GUID	"vdev_guid"

#ifdef	__cplusplus
}
#endif

#endif	/* _SYS_FS_ZFS_H */