xref: /illumos-gate/usr/src/uts/common/sys/fs/zfs.h (revision 4c2bdae20e15dfc656ce2c87808008f4da4fc3f0)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24  * Copyright (c) 2011, 2020 by Delphix. All rights reserved.
25  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
26  * Copyright (c) 2014 Integros [integros.com]
27  * Copyright 2020 Joyent, Inc.
28  * Copyright (c) 2017 Datto Inc.
29  * Copyright (c) 2017, Intel Corporation.
30  */
31 
32 /* Portions Copyright 2010 Robert Milkowski */
33 
34 #ifndef	_SYS_FS_ZFS_H
35 #define	_SYS_FS_ZFS_H
36 
37 #include <sys/time.h>
38 /*
39  * In OpenZFS we include sys/zio_priority.h to get the enum value of
40  * ZIO_PRIORITY_NUM_QUEUEABLE, which is used for the various array sizes in
41  * the structure definitions below. However, in illumos zio_priority.h is not
42  * readily available to the userland code where we have a very large number of
43  * files including sys/zfs.h. Thus, we define ZIO_PRIORITY_N_QUEUEABLE here and
44  * this should be kept in sync if ZIO_PRIORITY_NUM_QUEUEABLE changes.
45  */
46 #define	ZIO_PRIORITY_N_QUEUEABLE	8
47 
48 #ifdef	__cplusplus
49 extern "C" {
50 #endif
51 
52 /*
53  * Types and constants shared between userland and the kernel.
54  */
55 
56 /*
57  * Each dataset can be one of the following types.  These constants can be
58  * combined into masks that can be passed to various functions.
59  */
60 typedef enum {
61 	ZFS_TYPE_FILESYSTEM	= (1 << 0),
62 	ZFS_TYPE_SNAPSHOT	= (1 << 1),
63 	ZFS_TYPE_VOLUME		= (1 << 2),
64 	ZFS_TYPE_POOL		= (1 << 3),
65 	ZFS_TYPE_BOOKMARK	= (1 << 4)
66 } zfs_type_t;
67 
68 /*
69  * NB: lzc_dataset_type should be updated whenever a new objset type is added,
70  * if it represents a real type of a dataset that can be created from userland.
71  */
72 typedef enum dmu_objset_type {
73 	DMU_OST_NONE,
74 	DMU_OST_META,
75 	DMU_OST_ZFS,
76 	DMU_OST_ZVOL,
77 	DMU_OST_OTHER,			/* For testing only! */
78 	DMU_OST_ANY,			/* Be careful! */
79 	DMU_OST_NUMTYPES
80 } dmu_objset_type_t;
81 
82 #define	ZFS_TYPE_DATASET	\
83 	(ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME | ZFS_TYPE_SNAPSHOT)
84 
85 /*
86  * All of these include the terminating NUL byte.
87  */
88 #define	ZAP_MAXNAMELEN 256
89 #define	ZAP_MAXVALUELEN (1024 * 8)
90 #define	ZAP_OLDMAXVALUELEN 1024
91 #define	ZFS_MAX_DATASET_NAME_LEN 256
92 
93 /*
94  * Dataset properties are identified by these constants and must be added to
95  * the end of this list to ensure that external consumers are not affected
96  * by the change. If you make any changes to this list, be sure to update
97  * the property table in usr/src/common/zfs/zfs_prop.c.
98  */
99 typedef enum {
100 	ZPROP_CONT = -2,
101 	ZPROP_INVAL = -1,
102 	ZFS_PROP_TYPE = 0,
103 	ZFS_PROP_CREATION,
104 	ZFS_PROP_USED,
105 	ZFS_PROP_AVAILABLE,
106 	ZFS_PROP_REFERENCED,
107 	ZFS_PROP_COMPRESSRATIO,
108 	ZFS_PROP_MOUNTED,
109 	ZFS_PROP_ORIGIN,
110 	ZFS_PROP_QUOTA,
111 	ZFS_PROP_RESERVATION,
112 	ZFS_PROP_VOLSIZE,
113 	ZFS_PROP_VOLBLOCKSIZE,
114 	ZFS_PROP_RECORDSIZE,
115 	ZFS_PROP_MOUNTPOINT,
116 	ZFS_PROP_SHARENFS,
117 	ZFS_PROP_CHECKSUM,
118 	ZFS_PROP_COMPRESSION,
119 	ZFS_PROP_ATIME,
120 	ZFS_PROP_DEVICES,
121 	ZFS_PROP_EXEC,
122 	ZFS_PROP_SETUID,
123 	ZFS_PROP_READONLY,
124 	ZFS_PROP_ZONED,
125 	ZFS_PROP_SNAPDIR,
126 	ZFS_PROP_ACLMODE,
127 	ZFS_PROP_ACLINHERIT,
128 	ZFS_PROP_ACLIMPLICIT,	/* ACL Implicit Owner Rights (RackTop) */
129 	ZFS_PROP_CREATETXG,
130 	ZFS_PROP_NAME,			/* not exposed to the user */
131 	ZFS_PROP_CANMOUNT,
132 	ZFS_PROP_ISCSIOPTIONS,		/* not exposed to the user */
133 	ZFS_PROP_XATTR,
134 	ZFS_PROP_NUMCLONES,		/* not exposed to the user */
135 	ZFS_PROP_COPIES,
136 	ZFS_PROP_VERSION,
137 	ZFS_PROP_UTF8ONLY,
138 	ZFS_PROP_NORMALIZE,
139 	ZFS_PROP_CASE,
140 	ZFS_PROP_VSCAN,
141 	ZFS_PROP_NBMAND,
142 	ZFS_PROP_SHARESMB,
143 	ZFS_PROP_REFQUOTA,
144 	ZFS_PROP_REFRESERVATION,
145 	ZFS_PROP_GUID,
146 	ZFS_PROP_PRIMARYCACHE,
147 	ZFS_PROP_SECONDARYCACHE,
148 	ZFS_PROP_USEDSNAP,
149 	ZFS_PROP_USEDDS,
150 	ZFS_PROP_USEDCHILD,
151 	ZFS_PROP_USEDREFRESERV,
152 	ZFS_PROP_USERACCOUNTING,	/* not exposed to the user */
153 	ZFS_PROP_STMF_SHAREINFO,	/* not exposed to the user */
154 	ZFS_PROP_DEFER_DESTROY,
155 	ZFS_PROP_USERREFS,
156 	ZFS_PROP_LOGBIAS,
157 	ZFS_PROP_UNIQUE,		/* not exposed to the user */
158 	ZFS_PROP_OBJSETID,		/* not exposed to the user */
159 	ZFS_PROP_DEDUP,
160 	ZFS_PROP_MLSLABEL,
161 	ZFS_PROP_SYNC,
162 	ZFS_PROP_DNODESIZE,
163 	ZFS_PROP_REFRATIO,
164 	ZFS_PROP_WRITTEN,
165 	ZFS_PROP_CLONES,
166 	ZFS_PROP_LOGICALUSED,
167 	ZFS_PROP_LOGICALREFERENCED,
168 	ZFS_PROP_INCONSISTENT,		/* not exposed to the user */
169 	ZFS_PROP_FILESYSTEM_LIMIT,
170 	ZFS_PROP_SNAPSHOT_LIMIT,
171 	ZFS_PROP_FILESYSTEM_COUNT,
172 	ZFS_PROP_SNAPSHOT_COUNT,
173 	ZFS_PROP_REDUNDANT_METADATA,
174 	ZFS_PROP_PREV_SNAP,
175 	ZFS_PROP_RECEIVE_RESUME_TOKEN,
176 	ZFS_PROP_REMAPTXG,		/* not exposed to the user */
177 	ZFS_PROP_SPECIAL_SMALL_BLOCKS,
178 	ZFS_PROP_ENCRYPTION,
179 	ZFS_PROP_KEYLOCATION,
180 	ZFS_PROP_KEYFORMAT,
181 	ZFS_PROP_PBKDF2_SALT,
182 	ZFS_PROP_PBKDF2_ITERS,
183 	ZFS_PROP_ENCRYPTION_ROOT,
184 	ZFS_PROP_KEY_GUID,
185 	ZFS_PROP_KEYSTATUS,
186 	ZFS_PROP_IVSET_GUID,		/* not exposed to the user */
187 	ZFS_NUM_PROPS
188 } zfs_prop_t;
189 
190 typedef enum {
191 	ZFS_PROP_USERUSED,
192 	ZFS_PROP_USERQUOTA,
193 	ZFS_PROP_GROUPUSED,
194 	ZFS_PROP_GROUPQUOTA,
195 	ZFS_PROP_USEROBJUSED,
196 	ZFS_PROP_USEROBJQUOTA,
197 	ZFS_PROP_GROUPOBJUSED,
198 	ZFS_PROP_GROUPOBJQUOTA,
199 	ZFS_PROP_PROJECTUSED,
200 	ZFS_PROP_PROJECTQUOTA,
201 	ZFS_PROP_PROJECTOBJUSED,
202 	ZFS_PROP_PROJECTOBJQUOTA,
203 	ZFS_NUM_USERQUOTA_PROPS
204 } zfs_userquota_prop_t;
205 
206 extern const char *zfs_userquota_prop_prefixes[ZFS_NUM_USERQUOTA_PROPS];
207 
208 /*
209  * Pool properties are identified by these constants and must be added to the
210  * end of this list to ensure that external consumers are not affected
211  * by the change. If you make any changes to this list, be sure to update
212  * the property table in usr/src/common/zfs/zpool_prop.c.
213  */
214 typedef enum {
215 	ZPOOL_PROP_INVAL = -1,
216 	ZPOOL_PROP_NAME,
217 	ZPOOL_PROP_SIZE,
218 	ZPOOL_PROP_CAPACITY,
219 	ZPOOL_PROP_ALTROOT,
220 	ZPOOL_PROP_HEALTH,
221 	ZPOOL_PROP_GUID,
222 	ZPOOL_PROP_VERSION,
223 	ZPOOL_PROP_BOOTFS,
224 	ZPOOL_PROP_DELEGATION,
225 	ZPOOL_PROP_AUTOREPLACE,
226 	ZPOOL_PROP_CACHEFILE,
227 	ZPOOL_PROP_FAILUREMODE,
228 	ZPOOL_PROP_LISTSNAPS,
229 	ZPOOL_PROP_AUTOEXPAND,
230 	ZPOOL_PROP_DEDUPDITTO,
231 	ZPOOL_PROP_DEDUPRATIO,
232 	ZPOOL_PROP_FREE,
233 	ZPOOL_PROP_ALLOCATED,
234 	ZPOOL_PROP_READONLY,
235 	ZPOOL_PROP_COMMENT,
236 	ZPOOL_PROP_EXPANDSZ,
237 	ZPOOL_PROP_FREEING,
238 	ZPOOL_PROP_FRAGMENTATION,
239 	ZPOOL_PROP_LEAKED,
240 	ZPOOL_PROP_MAXBLOCKSIZE,
241 	ZPOOL_PROP_BOOTSIZE,
242 	ZPOOL_PROP_CHECKPOINT,
243 	ZPOOL_PROP_TNAME,
244 	ZPOOL_PROP_MAXDNODESIZE,
245 	ZPOOL_PROP_MULTIHOST,
246 	ZPOOL_PROP_ASHIFT,
247 	ZPOOL_PROP_AUTOTRIM,
248 	ZPOOL_NUM_PROPS
249 } zpool_prop_t;
250 
251 /* Small enough to not hog a whole line of printout in zpool(8). */
252 #define	ZPROP_MAX_COMMENT	32
253 
254 #define	ZPROP_VALUE		"value"
255 #define	ZPROP_SOURCE		"source"
256 
257 typedef enum {
258 	ZPROP_SRC_NONE = 0x1,
259 	ZPROP_SRC_DEFAULT = 0x2,
260 	ZPROP_SRC_TEMPORARY = 0x4,
261 	ZPROP_SRC_LOCAL = 0x8,
262 	ZPROP_SRC_INHERITED = 0x10,
263 	ZPROP_SRC_RECEIVED = 0x20
264 } zprop_source_t;
265 
266 #define	ZPROP_SRC_ALL	0x3f
267 
268 #define	ZPROP_SOURCE_VAL_RECVD	"$recvd"
269 #define	ZPROP_N_MORE_ERRORS	"N_MORE_ERRORS"
270 /*
271  * Dataset flag implemented as a special entry in the props zap object
272  * indicating that the dataset has received properties on or after
273  * SPA_VERSION_RECVD_PROPS. The first such receive blows away local properties
274  * just as it did in earlier versions, and thereafter, local properties are
275  * preserved.
276  */
277 #define	ZPROP_HAS_RECVD		"$hasrecvd"
278 
279 typedef enum {
280 	ZPROP_ERR_NOCLEAR = 0x1, /* failure to clear existing props */
281 	ZPROP_ERR_NORESTORE = 0x2 /* failure to restore props on error */
282 } zprop_errflags_t;
283 
284 typedef int (*zprop_func)(int, void *);
285 
286 /*
287  * Properties to be set on the root file system of a new pool
288  * are stuffed into their own nvlist, which is then included in
289  * the properties nvlist with the pool properties.
290  */
291 #define	ZPOOL_ROOTFS_PROPS	"root-props-nvl"
292 
293 /*
294  * Length of 'written@' and 'written#'
295  */
296 #define	ZFS_WRITTEN_PROP_PREFIX_LEN	8
297 
298 /*
299  * Dataset property functions shared between libzfs and kernel.
300  */
301 const char *zfs_prop_default_string(zfs_prop_t);
302 uint64_t zfs_prop_default_numeric(zfs_prop_t);
303 boolean_t zfs_prop_readonly(zfs_prop_t);
304 boolean_t zfs_prop_visible(zfs_prop_t prop);
305 boolean_t zfs_prop_inheritable(zfs_prop_t);
306 boolean_t zfs_prop_setonce(zfs_prop_t);
307 boolean_t zfs_prop_encryption_key_param(zfs_prop_t);
308 boolean_t zfs_prop_valid_keylocation(const char *, boolean_t);
309 const char *zfs_prop_to_name(zfs_prop_t);
310 zfs_prop_t zfs_name_to_prop(const char *);
311 boolean_t zfs_prop_user(const char *);
312 boolean_t zfs_prop_userquota(const char *);
313 boolean_t zfs_prop_written(const char *);
314 int zfs_prop_index_to_string(zfs_prop_t, uint64_t, const char **);
315 int zfs_prop_string_to_index(zfs_prop_t, const char *, uint64_t *);
316 uint64_t zfs_prop_random_value(zfs_prop_t, uint64_t seed);
317 boolean_t zfs_prop_valid_for_type(int, zfs_type_t, boolean_t);
318 
319 /*
320  * Pool property functions shared between libzfs and kernel.
321  */
322 zpool_prop_t zpool_name_to_prop(const char *);
323 const char *zpool_prop_to_name(zpool_prop_t);
324 const char *zpool_prop_default_string(zpool_prop_t);
325 uint64_t zpool_prop_default_numeric(zpool_prop_t);
326 boolean_t zpool_prop_readonly(zpool_prop_t);
327 boolean_t zpool_prop_feature(const char *);
328 boolean_t zpool_prop_unsupported(const char *name);
329 int zpool_prop_index_to_string(zpool_prop_t, uint64_t, const char **);
330 int zpool_prop_string_to_index(zpool_prop_t, const char *, uint64_t *);
331 uint64_t zpool_prop_random_value(zpool_prop_t, uint64_t seed);
332 
333 /*
334  * Definitions for the Delegation.
335  */
336 typedef enum {
337 	ZFS_DELEG_WHO_UNKNOWN = 0,
338 	ZFS_DELEG_USER = 'u',
339 	ZFS_DELEG_USER_SETS = 'U',
340 	ZFS_DELEG_GROUP = 'g',
341 	ZFS_DELEG_GROUP_SETS = 'G',
342 	ZFS_DELEG_EVERYONE = 'e',
343 	ZFS_DELEG_EVERYONE_SETS = 'E',
344 	ZFS_DELEG_CREATE = 'c',
345 	ZFS_DELEG_CREATE_SETS = 'C',
346 	ZFS_DELEG_NAMED_SET = 's',
347 	ZFS_DELEG_NAMED_SET_SETS = 'S'
348 } zfs_deleg_who_type_t;
349 
350 typedef enum {
351 	ZFS_DELEG_NONE = 0,
352 	ZFS_DELEG_PERM_LOCAL = 1,
353 	ZFS_DELEG_PERM_DESCENDENT = 2,
354 	ZFS_DELEG_PERM_LOCALDESCENDENT = 3,
355 	ZFS_DELEG_PERM_CREATE = 4
356 } zfs_deleg_inherit_t;
357 
358 #define	ZFS_DELEG_PERM_UID	"uid"
359 #define	ZFS_DELEG_PERM_GID	"gid"
360 #define	ZFS_DELEG_PERM_GROUPS	"groups"
361 
362 #define	ZFS_MLSLABEL_DEFAULT	"none"
363 
364 #define	ZFS_SMB_ACL_SRC		"src"
365 #define	ZFS_SMB_ACL_TARGET	"target"
366 
367 typedef enum {
368 	ZFS_CANMOUNT_OFF = 0,
369 	ZFS_CANMOUNT_ON = 1,
370 	ZFS_CANMOUNT_NOAUTO = 2
371 } zfs_canmount_type_t;
372 
373 typedef enum {
374 	ZFS_LOGBIAS_LATENCY = 0,
375 	ZFS_LOGBIAS_THROUGHPUT = 1
376 } zfs_logbias_op_t;
377 
378 typedef enum zfs_share_op {
379 	ZFS_SHARE_NFS = 0,
380 	ZFS_UNSHARE_NFS = 1,
381 	ZFS_SHARE_SMB = 2,
382 	ZFS_UNSHARE_SMB = 3
383 } zfs_share_op_t;
384 
385 typedef enum zfs_smb_acl_op {
386 	ZFS_SMB_ACL_ADD,
387 	ZFS_SMB_ACL_REMOVE,
388 	ZFS_SMB_ACL_RENAME,
389 	ZFS_SMB_ACL_PURGE
390 } zfs_smb_acl_op_t;
391 
392 typedef enum zfs_cache_type {
393 	ZFS_CACHE_NONE = 0,
394 	ZFS_CACHE_METADATA = 1,
395 	ZFS_CACHE_ALL = 2
396 } zfs_cache_type_t;
397 
398 typedef enum {
399 	ZFS_SYNC_STANDARD = 0,
400 	ZFS_SYNC_ALWAYS = 1,
401 	ZFS_SYNC_DISABLED = 2
402 } zfs_sync_type_t;
403 
404 typedef enum {
405 	ZFS_DNSIZE_LEGACY = 0,
406 	ZFS_DNSIZE_AUTO = 1,
407 	ZFS_DNSIZE_1K = 1024,
408 	ZFS_DNSIZE_2K = 2048,
409 	ZFS_DNSIZE_4K = 4096,
410 	ZFS_DNSIZE_8K = 8192,
411 	ZFS_DNSIZE_16K = 16384
412 } zfs_dnsize_type_t;
413 
414 typedef enum {
415 	ZFS_REDUNDANT_METADATA_ALL,
416 	ZFS_REDUNDANT_METADATA_MOST
417 } zfs_redundant_metadata_type_t;
418 
419 typedef enum zfs_keystatus {
420 	ZFS_KEYSTATUS_NONE = 0,
421 	ZFS_KEYSTATUS_UNAVAILABLE,
422 	ZFS_KEYSTATUS_AVAILABLE
423 } zfs_keystatus_t;
424 
425 typedef enum zfs_keyformat {
426 	ZFS_KEYFORMAT_NONE = 0,
427 	ZFS_KEYFORMAT_RAW,
428 	ZFS_KEYFORMAT_HEX,
429 	ZFS_KEYFORMAT_PASSPHRASE,
430 	ZFS_KEYFORMAT_FORMATS
431 } zfs_keyformat_t;
432 
433 typedef enum zfs_key_location {
434 	ZFS_KEYLOCATION_NONE = 0,
435 	ZFS_KEYLOCATION_PROMPT,
436 	ZFS_KEYLOCATION_URI,
437 	ZFS_KEYLOCATION_LOCATIONS
438 } zfs_keylocation_t;
439 
440 #define	DEFAULT_PBKDF2_ITERATIONS 350000
441 #define	MIN_PBKDF2_ITERATIONS 100000
442 
443 /*
444  * On-disk version number.
445  */
446 #define	SPA_VERSION_1			1ULL
447 #define	SPA_VERSION_2			2ULL
448 #define	SPA_VERSION_3			3ULL
449 #define	SPA_VERSION_4			4ULL
450 #define	SPA_VERSION_5			5ULL
451 #define	SPA_VERSION_6			6ULL
452 #define	SPA_VERSION_7			7ULL
453 #define	SPA_VERSION_8			8ULL
454 #define	SPA_VERSION_9			9ULL
455 #define	SPA_VERSION_10			10ULL
456 #define	SPA_VERSION_11			11ULL
457 #define	SPA_VERSION_12			12ULL
458 #define	SPA_VERSION_13			13ULL
459 #define	SPA_VERSION_14			14ULL
460 #define	SPA_VERSION_15			15ULL
461 #define	SPA_VERSION_16			16ULL
462 #define	SPA_VERSION_17			17ULL
463 #define	SPA_VERSION_18			18ULL
464 #define	SPA_VERSION_19			19ULL
465 #define	SPA_VERSION_20			20ULL
466 #define	SPA_VERSION_21			21ULL
467 #define	SPA_VERSION_22			22ULL
468 #define	SPA_VERSION_23			23ULL
469 #define	SPA_VERSION_24			24ULL
470 #define	SPA_VERSION_25			25ULL
471 #define	SPA_VERSION_26			26ULL
472 #define	SPA_VERSION_27			27ULL
473 #define	SPA_VERSION_28			28ULL
474 #define	SPA_VERSION_5000		5000ULL
475 
476 /*
477  * When bumping up SPA_VERSION, make sure GRUB ZFS understands the on-disk
478  * format change. Go to usr/src/grub/grub-0.97/stage2/{zfs-include/, fsys_zfs*},
479  * and do the appropriate changes.  Also bump the version number in
480  * usr/src/grub/capability.
481  */
482 #define	SPA_VERSION			SPA_VERSION_5000
483 #define	SPA_VERSION_STRING		"5000"
484 
485 /*
486  * Symbolic names for the changes that caused a SPA_VERSION switch.
487  * Used in the code when checking for presence or absence of a feature.
488  * Feel free to define multiple symbolic names for each version if there
489  * were multiple changes to on-disk structures during that version.
490  *
491  * NOTE: When checking the current SPA_VERSION in your code, be sure
492  *       to use spa_version() since it reports the version of the
493  *       last synced uberblock.  Checking the in-flight version can
494  *       be dangerous in some cases.
495  */
496 #define	SPA_VERSION_INITIAL		SPA_VERSION_1
497 #define	SPA_VERSION_DITTO_BLOCKS	SPA_VERSION_2
498 #define	SPA_VERSION_SPARES		SPA_VERSION_3
499 #define	SPA_VERSION_RAIDZ2		SPA_VERSION_3
500 #define	SPA_VERSION_BPOBJ_ACCOUNT	SPA_VERSION_3
501 #define	SPA_VERSION_RAIDZ_DEFLATE	SPA_VERSION_3
502 #define	SPA_VERSION_DNODE_BYTES		SPA_VERSION_3
503 #define	SPA_VERSION_ZPOOL_HISTORY	SPA_VERSION_4
504 #define	SPA_VERSION_GZIP_COMPRESSION	SPA_VERSION_5
505 #define	SPA_VERSION_BOOTFS		SPA_VERSION_6
506 #define	SPA_VERSION_SLOGS		SPA_VERSION_7
507 #define	SPA_VERSION_DELEGATED_PERMS	SPA_VERSION_8
508 #define	SPA_VERSION_FUID		SPA_VERSION_9
509 #define	SPA_VERSION_REFRESERVATION	SPA_VERSION_9
510 #define	SPA_VERSION_REFQUOTA		SPA_VERSION_9
511 #define	SPA_VERSION_UNIQUE_ACCURATE	SPA_VERSION_9
512 #define	SPA_VERSION_L2CACHE		SPA_VERSION_10
513 #define	SPA_VERSION_NEXT_CLONES		SPA_VERSION_11
514 #define	SPA_VERSION_ORIGIN		SPA_VERSION_11
515 #define	SPA_VERSION_DSL_SCRUB		SPA_VERSION_11
516 #define	SPA_VERSION_SNAP_PROPS		SPA_VERSION_12
517 #define	SPA_VERSION_USED_BREAKDOWN	SPA_VERSION_13
518 #define	SPA_VERSION_PASSTHROUGH_X	SPA_VERSION_14
519 #define	SPA_VERSION_USERSPACE		SPA_VERSION_15
520 #define	SPA_VERSION_STMF_PROP		SPA_VERSION_16
521 #define	SPA_VERSION_RAIDZ3		SPA_VERSION_17
522 #define	SPA_VERSION_USERREFS		SPA_VERSION_18
523 #define	SPA_VERSION_HOLES		SPA_VERSION_19
524 #define	SPA_VERSION_ZLE_COMPRESSION	SPA_VERSION_20
525 #define	SPA_VERSION_DEDUP		SPA_VERSION_21
526 #define	SPA_VERSION_RECVD_PROPS		SPA_VERSION_22
527 #define	SPA_VERSION_SLIM_ZIL		SPA_VERSION_23
528 #define	SPA_VERSION_SA			SPA_VERSION_24
529 #define	SPA_VERSION_SCAN		SPA_VERSION_25
530 #define	SPA_VERSION_DIR_CLONES		SPA_VERSION_26
531 #define	SPA_VERSION_DEADLISTS		SPA_VERSION_26
532 #define	SPA_VERSION_FAST_SNAP		SPA_VERSION_27
533 #define	SPA_VERSION_MULTI_REPLACE	SPA_VERSION_28
534 #define	SPA_VERSION_BEFORE_FEATURES	SPA_VERSION_28
535 #define	SPA_VERSION_FEATURES		SPA_VERSION_5000
536 
537 #define	SPA_VERSION_IS_SUPPORTED(v) \
538 	(((v) >= SPA_VERSION_INITIAL && (v) <= SPA_VERSION_BEFORE_FEATURES) || \
539 	((v) >= SPA_VERSION_FEATURES && (v) <= SPA_VERSION))
540 
541 /*
542  * ZPL version - rev'd whenever an incompatible on-disk format change
543  * occurs.  This is independent of SPA/DMU/ZAP versioning.  You must
544  * also update the version_table[] and help message in zfs_prop.c.
545  *
546  * When changing, be sure to teach GRUB how to read the new format!
547  * See usr/src/grub/grub-0.97/stage2/{zfs-include/,fsys_zfs*}
548  */
549 #define	ZPL_VERSION_1			1ULL
550 #define	ZPL_VERSION_2			2ULL
551 #define	ZPL_VERSION_3			3ULL
552 #define	ZPL_VERSION_4			4ULL
553 #define	ZPL_VERSION_5			5ULL
554 #define	ZPL_VERSION			ZPL_VERSION_5
555 #define	ZPL_VERSION_STRING		"5"
556 
557 #define	ZPL_VERSION_INITIAL		ZPL_VERSION_1
558 #define	ZPL_VERSION_DIRENT_TYPE		ZPL_VERSION_2
559 #define	ZPL_VERSION_FUID		ZPL_VERSION_3
560 #define	ZPL_VERSION_NORMALIZATION	ZPL_VERSION_3
561 #define	ZPL_VERSION_SYSATTR		ZPL_VERSION_3
562 #define	ZPL_VERSION_USERSPACE		ZPL_VERSION_4
563 #define	ZPL_VERSION_SA			ZPL_VERSION_5
564 
565 /* Persistent L2ARC version */
566 #define	L2ARC_PERSISTENT_VERSION_1	1ULL
567 #define	L2ARC_PERSISTENT_VERSION	L2ARC_PERSISTENT_VERSION_1
568 #define	L2ARC_PERSISTENT_VERSION_STRING	"1"
569 
570 /* Rewind policy information */
571 #define	ZPOOL_NO_REWIND		1  /* No policy - default behavior */
572 #define	ZPOOL_NEVER_REWIND	2  /* Do not search for best txg or rewind */
573 #define	ZPOOL_TRY_REWIND	4  /* Search for best txg, but do not rewind */
574 #define	ZPOOL_DO_REWIND		8  /* Rewind to best txg w/in deferred frees */
575 #define	ZPOOL_EXTREME_REWIND	16 /* Allow extreme measures to find best txg */
576 #define	ZPOOL_REWIND_MASK	28 /* All the possible rewind bits */
577 #define	ZPOOL_REWIND_POLICIES	31 /* All the possible policy bits */
578 
579 typedef struct zpool_load_policy {
580 	uint32_t	zlp_rewind;	/* rewind policy requested */
581 	uint64_t	zlp_maxmeta;	/* max acceptable meta-data errors */
582 	uint64_t	zlp_maxdata;	/* max acceptable data errors */
583 	uint64_t	zlp_txg;	/* specific txg to load */
584 } zpool_load_policy_t;
585 
586 /*
587  * The following are configuration names used in the nvlist describing a pool's
588  * configuration.  New on-disk names should be prefixed with "<reverse-DNS>:"
589  * (e.g. "org.open-zfs:") to avoid conflicting names being developed
590  * independently.
591  */
592 #define	ZPOOL_CONFIG_VERSION		"version"
593 #define	ZPOOL_CONFIG_POOL_NAME		"name"
594 #define	ZPOOL_CONFIG_POOL_STATE		"state"
595 #define	ZPOOL_CONFIG_POOL_TXG		"txg"
596 #define	ZPOOL_CONFIG_POOL_GUID		"pool_guid"
597 #define	ZPOOL_CONFIG_CREATE_TXG		"create_txg"
598 #define	ZPOOL_CONFIG_TOP_GUID		"top_guid"
599 #define	ZPOOL_CONFIG_VDEV_TREE		"vdev_tree"
600 #define	ZPOOL_CONFIG_TYPE		"type"
601 #define	ZPOOL_CONFIG_CHILDREN		"children"
602 #define	ZPOOL_CONFIG_ID			"id"
603 #define	ZPOOL_CONFIG_GUID		"guid"
604 #define	ZPOOL_CONFIG_INDIRECT_OBJECT	"com.delphix:indirect_object"
605 #define	ZPOOL_CONFIG_INDIRECT_BIRTHS	"com.delphix:indirect_births"
606 #define	ZPOOL_CONFIG_PREV_INDIRECT_VDEV	"com.delphix:prev_indirect_vdev"
607 #define	ZPOOL_CONFIG_PATH		"path"
608 #define	ZPOOL_CONFIG_DEVID		"devid"
609 #define	ZPOOL_CONFIG_METASLAB_ARRAY	"metaslab_array"
610 #define	ZPOOL_CONFIG_METASLAB_SHIFT	"metaslab_shift"
611 #define	ZPOOL_CONFIG_ASHIFT		"ashift"
612 #define	ZPOOL_CONFIG_ASIZE		"asize"
613 #define	ZPOOL_CONFIG_DTL		"DTL"
614 #define	ZPOOL_CONFIG_SCAN_STATS		"scan_stats"	/* not stored on disk */
615 #define	ZPOOL_CONFIG_REMOVAL_STATS	"removal_stats"	/* not stored on disk */
616 #define	ZPOOL_CONFIG_CHECKPOINT_STATS	"checkpoint_stats" /* not on disk */
617 #define	ZPOOL_CONFIG_VDEV_STATS		"vdev_stats"	/* not stored on disk */
618 #define	ZPOOL_CONFIG_INDIRECT_SIZE	"indirect_size"	/* not stored on disk */
619 
620 /* container nvlist of extended stats */
621 #define	ZPOOL_CONFIG_VDEV_STATS_EX	"vdev_stats_ex"
622 
623 /* Active queue read/write stats */
624 #define	ZPOOL_CONFIG_VDEV_SYNC_R_ACTIVE_QUEUE	"vdev_sync_r_active_queue"
625 #define	ZPOOL_CONFIG_VDEV_SYNC_W_ACTIVE_QUEUE	"vdev_sync_w_active_queue"
626 #define	ZPOOL_CONFIG_VDEV_ASYNC_R_ACTIVE_QUEUE	"vdev_async_r_active_queue"
627 #define	ZPOOL_CONFIG_VDEV_ASYNC_W_ACTIVE_QUEUE	"vdev_async_w_active_queue"
628 #define	ZPOOL_CONFIG_VDEV_SCRUB_ACTIVE_QUEUE	"vdev_async_scrub_active_queue"
629 #define	ZPOOL_CONFIG_VDEV_TRIM_ACTIVE_QUEUE	"vdev_async_trim_active_queue"
630 
631 /* Queue sizes */
632 #define	ZPOOL_CONFIG_VDEV_SYNC_R_PEND_QUEUE	"vdev_sync_r_pend_queue"
633 #define	ZPOOL_CONFIG_VDEV_SYNC_W_PEND_QUEUE	"vdev_sync_w_pend_queue"
634 #define	ZPOOL_CONFIG_VDEV_ASYNC_R_PEND_QUEUE	"vdev_async_r_pend_queue"
635 #define	ZPOOL_CONFIG_VDEV_ASYNC_W_PEND_QUEUE	"vdev_async_w_pend_queue"
636 #define	ZPOOL_CONFIG_VDEV_SCRUB_PEND_QUEUE	"vdev_async_scrub_pend_queue"
637 #define	ZPOOL_CONFIG_VDEV_TRIM_PEND_QUEUE	"vdev_async_trim_pend_queue"
638 
639 /* Latency read/write histogram stats */
640 #define	ZPOOL_CONFIG_VDEV_TOT_R_LAT_HISTO	"vdev_tot_r_lat_histo"
641 #define	ZPOOL_CONFIG_VDEV_TOT_W_LAT_HISTO	"vdev_tot_w_lat_histo"
642 #define	ZPOOL_CONFIG_VDEV_DISK_R_LAT_HISTO	"vdev_disk_r_lat_histo"
643 #define	ZPOOL_CONFIG_VDEV_DISK_W_LAT_HISTO	"vdev_disk_w_lat_histo"
644 #define	ZPOOL_CONFIG_VDEV_SYNC_R_LAT_HISTO	"vdev_sync_r_lat_histo"
645 #define	ZPOOL_CONFIG_VDEV_SYNC_W_LAT_HISTO	"vdev_sync_w_lat_histo"
646 #define	ZPOOL_CONFIG_VDEV_ASYNC_R_LAT_HISTO	"vdev_async_r_lat_histo"
647 #define	ZPOOL_CONFIG_VDEV_ASYNC_W_LAT_HISTO	"vdev_async_w_lat_histo"
648 #define	ZPOOL_CONFIG_VDEV_SCRUB_LAT_HISTO	"vdev_scrub_histo"
649 #define	ZPOOL_CONFIG_VDEV_TRIM_LAT_HISTO	"vdev_trim_histo"
650 
651 /* Request size histograms */
652 #define	ZPOOL_CONFIG_VDEV_SYNC_IND_R_HISTO	"vdev_sync_ind_r_histo"
653 #define	ZPOOL_CONFIG_VDEV_SYNC_IND_W_HISTO	"vdev_sync_ind_w_histo"
654 #define	ZPOOL_CONFIG_VDEV_ASYNC_IND_R_HISTO	"vdev_async_ind_r_histo"
655 #define	ZPOOL_CONFIG_VDEV_ASYNC_IND_W_HISTO	"vdev_async_ind_w_histo"
656 #define	ZPOOL_CONFIG_VDEV_IND_SCRUB_HISTO	"vdev_ind_scrub_histo"
657 #define	ZPOOL_CONFIG_VDEV_IND_TRIM_HISTO	"vdev_ind_trim_histo"
658 #define	ZPOOL_CONFIG_VDEV_SYNC_AGG_R_HISTO	"vdev_sync_agg_r_histo"
659 #define	ZPOOL_CONFIG_VDEV_SYNC_AGG_W_HISTO	"vdev_sync_agg_w_histo"
660 #define	ZPOOL_CONFIG_VDEV_ASYNC_AGG_R_HISTO	"vdev_async_agg_r_histo"
661 #define	ZPOOL_CONFIG_VDEV_ASYNC_AGG_W_HISTO	"vdev_async_agg_w_histo"
662 #define	ZPOOL_CONFIG_VDEV_AGG_SCRUB_HISTO	"vdev_agg_scrub_histo"
663 #define	ZPOOL_CONFIG_VDEV_AGG_TRIM_HISTO	"vdev_agg_trim_histo"
664 
665 /* Number of slow IOs */
666 #define	ZPOOL_CONFIG_VDEV_SLOW_IOS		"vdev_slow_ios"
667 
668 #define	ZPOOL_CONFIG_WHOLE_DISK		"whole_disk"
669 #define	ZPOOL_CONFIG_ERRCOUNT		"error_count"
670 #define	ZPOOL_CONFIG_NOT_PRESENT	"not_present"
671 #define	ZPOOL_CONFIG_SPARES		"spares"
672 #define	ZPOOL_CONFIG_IS_SPARE		"is_spare"
673 #define	ZPOOL_CONFIG_NPARITY		"nparity"
674 #define	ZPOOL_CONFIG_HOSTID		"hostid"
675 #define	ZPOOL_CONFIG_HOSTNAME		"hostname"
676 #define	ZPOOL_CONFIG_LOADED_TIME	"initial_load_time"
677 #define	ZPOOL_CONFIG_UNSPARE		"unspare"
678 #define	ZPOOL_CONFIG_PHYS_PATH		"phys_path"
679 #define	ZPOOL_CONFIG_IS_LOG		"is_log"
680 #define	ZPOOL_CONFIG_L2CACHE		"l2cache"
681 #define	ZPOOL_CONFIG_HOLE_ARRAY		"hole_array"
682 #define	ZPOOL_CONFIG_VDEV_CHILDREN	"vdev_children"
683 #define	ZPOOL_CONFIG_IS_HOLE		"is_hole"
684 #define	ZPOOL_CONFIG_DDT_HISTOGRAM	"ddt_histogram"
685 #define	ZPOOL_CONFIG_DDT_OBJ_STATS	"ddt_object_stats"
686 #define	ZPOOL_CONFIG_DDT_STATS		"ddt_stats"
687 #define	ZPOOL_CONFIG_SPLIT		"splitcfg"
688 #define	ZPOOL_CONFIG_ORIG_GUID		"orig_guid"
689 #define	ZPOOL_CONFIG_SPLIT_GUID		"split_guid"
690 #define	ZPOOL_CONFIG_SPLIT_LIST		"guid_list"
691 #define	ZPOOL_CONFIG_REMOVING		"removing"
692 #define	ZPOOL_CONFIG_RESILVER_TXG	"resilver_txg"
693 #define	ZPOOL_CONFIG_COMMENT		"comment"
694 #define	ZPOOL_CONFIG_SUSPENDED		"suspended"	/* not stored on disk */
695 #define	ZPOOL_CONFIG_SUSPENDED_REASON	"suspended_reason"	/* not stored */
696 #define	ZPOOL_CONFIG_TIMESTAMP		"timestamp"	/* not stored on disk */
697 #define	ZPOOL_CONFIG_BOOTFS		"bootfs"	/* not stored on disk */
698 #define	ZPOOL_CONFIG_MISSING_DEVICES	"missing_vdevs"	/* not stored on disk */
699 #define	ZPOOL_CONFIG_LOAD_INFO		"load_info"	/* not stored on disk */
700 #define	ZPOOL_CONFIG_REWIND_INFO	"rewind_info"	/* not stored on disk */
701 #define	ZPOOL_CONFIG_UNSUP_FEAT		"unsup_feat"	/* not stored on disk */
702 #define	ZPOOL_CONFIG_ENABLED_FEAT	"enabled_feat"	/* not stored on disk */
703 #define	ZPOOL_CONFIG_CAN_RDONLY		"can_rdonly"	/* not stored on disk */
704 #define	ZPOOL_CONFIG_FEATURES_FOR_READ	"features_for_read"
705 #define	ZPOOL_CONFIG_FEATURE_STATS	"feature_stats"	/* not stored on disk */
706 #define	ZPOOL_CONFIG_ERRATA		"errata"	/* not stored on disk */
707 #define	ZPOOL_CONFIG_VDEV_TOP_ZAP	"com.delphix:vdev_zap_top"
708 #define	ZPOOL_CONFIG_VDEV_LEAF_ZAP	"com.delphix:vdev_zap_leaf"
709 #define	ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS	"com.delphix:has_per_vdev_zaps"
710 #define	ZPOOL_CONFIG_RESILVER_DEFER	"com.datto:resilver_defer"
711 #define	ZPOOL_CONFIG_CACHEFILE		"cachefile"	/* not stored on disk */
712 #define	ZPOOL_CONFIG_MMP_STATE		"mmp_state"	/* not stored on disk */
713 #define	ZPOOL_CONFIG_MMP_TXG		"mmp_txg"	/* not stored on disk */
714 #define	ZPOOL_CONFIG_MMP_SEQ		"mmp_seq"	/* not stored on disk */
715 #define	ZPOOL_CONFIG_MMP_HOSTNAME	"mmp_hostname"	/* not stored on disk */
716 #define	ZPOOL_CONFIG_MMP_HOSTID		"mmp_hostid"	/* not stored on disk */
717 #define	ZPOOL_CONFIG_ALLOCATION_BIAS	"alloc_bias"	/* not stored on disk */
718 
719 /*
720  * The persistent vdev state is stored as separate values rather than a single
721  * 'vdev_state' entry.  This is because a device can be in multiple states, such
722  * as offline and degraded.
723  */
724 #define	ZPOOL_CONFIG_OFFLINE		"offline"
725 #define	ZPOOL_CONFIG_FAULTED		"faulted"
726 #define	ZPOOL_CONFIG_DEGRADED		"degraded"
727 #define	ZPOOL_CONFIG_REMOVED		"removed"
728 #define	ZPOOL_CONFIG_FRU		"fru"
729 #define	ZPOOL_CONFIG_AUX_STATE		"aux_state"
730 
731 /* Pool load policy parameters */
732 #define	ZPOOL_LOAD_POLICY		"load-policy"
733 #define	ZPOOL_LOAD_REWIND_POLICY	"load-rewind-policy"
734 #define	ZPOOL_LOAD_REQUEST_TXG		"load-request-txg"
735 #define	ZPOOL_LOAD_META_THRESH		"load-meta-thresh"
736 #define	ZPOOL_LOAD_DATA_THRESH		"load-data-thresh"
737 
738 /* Rewind data discovered */
739 #define	ZPOOL_CONFIG_LOAD_TIME		"rewind_txg_ts"
740 #define	ZPOOL_CONFIG_LOAD_DATA_ERRORS	"verify_data_errors"
741 #define	ZPOOL_CONFIG_REWIND_TIME	"seconds_of_rewind"
742 
743 #define	VDEV_TYPE_ROOT			"root"
744 #define	VDEV_TYPE_MIRROR		"mirror"
745 #define	VDEV_TYPE_REPLACING		"replacing"
746 #define	VDEV_TYPE_RAIDZ			"raidz"
747 #define	VDEV_TYPE_DISK			"disk"
748 #define	VDEV_TYPE_FILE			"file"
749 #define	VDEV_TYPE_MISSING		"missing"
750 #define	VDEV_TYPE_HOLE			"hole"
751 #define	VDEV_TYPE_SPARE			"spare"
752 #define	VDEV_TYPE_LOG			"log"
753 #define	VDEV_TYPE_L2CACHE		"l2cache"
754 #define	VDEV_TYPE_INDIRECT		"indirect"
755 
756 /* VDEV_TOP_ZAP_* are used in top-level vdev ZAP objects. */
757 #define	VDEV_TOP_ZAP_INDIRECT_OBSOLETE_SM \
758 	"com.delphix:indirect_obsolete_sm"
759 #define	VDEV_TOP_ZAP_OBSOLETE_COUNTS_ARE_PRECISE \
760 	"com.delphix:obsolete_counts_are_precise"
761 #define	VDEV_TOP_ZAP_POOL_CHECKPOINT_SM \
762 	"com.delphix:pool_checkpoint_sm"
763 #define	VDEV_TOP_ZAP_MS_UNFLUSHED_PHYS_TXGS \
764 	"com.delphix:ms_unflushed_phys_txgs"
765 
766 #define	VDEV_TOP_ZAP_ALLOCATION_BIAS \
767 	"org.zfsonlinux:allocation_bias"
768 
769 /* vdev metaslab allocation bias */
770 #define	VDEV_ALLOC_BIAS_LOG		"log"
771 #define	VDEV_ALLOC_BIAS_SPECIAL		"special"
772 #define	VDEV_ALLOC_BIAS_DEDUP		"dedup"
773 
774 /* vdev initialize state */
775 #define	VDEV_LEAF_ZAP_INITIALIZE_LAST_OFFSET	\
776 	"com.delphix:next_offset_to_initialize"
777 #define	VDEV_LEAF_ZAP_INITIALIZE_STATE	\
778 	"com.delphix:vdev_initialize_state"
779 #define	VDEV_LEAF_ZAP_INITIALIZE_ACTION_TIME	\
780 	"com.delphix:vdev_initialize_action_time"
781 
782 /* vdev TRIM state */
783 #define	VDEV_LEAF_ZAP_TRIM_LAST_OFFSET	\
784 	"org.zfsonlinux:next_offset_to_trim"
785 #define	VDEV_LEAF_ZAP_TRIM_STATE	\
786 	"org.zfsonlinux:vdev_trim_state"
787 #define	VDEV_LEAF_ZAP_TRIM_ACTION_TIME	\
788 	"org.zfsonlinux:vdev_trim_action_time"
789 #define	VDEV_LEAF_ZAP_TRIM_RATE		\
790 	"org.zfsonlinux:vdev_trim_rate"
791 #define	VDEV_LEAF_ZAP_TRIM_PARTIAL	\
792 	"org.zfsonlinux:vdev_trim_partial"
793 #define	VDEV_LEAF_ZAP_TRIM_SECURE	\
794 	"org.zfsonlinux:vdev_trim_secure"
795 
796 /*
797  * This is needed in userland to report the minimum necessary device size.
798  *
799  * Note that the zfs test suite uses 64MB vdevs.
800  */
801 #define	SPA_MINDEVSIZE		(64ULL << 20)
802 
803 /*
804  * Set if the fragmentation has not yet been calculated. This can happen
805  * because the space maps have not been upgraded or the histogram feature
806  * is not enabled.
807  */
808 #define	ZFS_FRAG_INVALID	UINT64_MAX
809 
810 /*
811  * The location of the pool configuration repository, shared between kernel and
812  * userland.
813  */
814 #define	ZPOOL_CACHE		"/etc/zfs/zpool.cache"
815 
816 /*
817  * vdev states are ordered from least to most healthy.
818  * A vdev that's CANT_OPEN or below is considered unusable.
819  */
820 typedef enum vdev_state {
821 	VDEV_STATE_UNKNOWN = 0,	/* Uninitialized vdev			*/
822 	VDEV_STATE_CLOSED,	/* Not currently open			*/
823 	VDEV_STATE_OFFLINE,	/* Not allowed to open			*/
824 	VDEV_STATE_REMOVED,	/* Explicitly removed from system	*/
825 	VDEV_STATE_CANT_OPEN,	/* Tried to open, but failed		*/
826 	VDEV_STATE_FAULTED,	/* External request to fault device	*/
827 	VDEV_STATE_DEGRADED,	/* Replicated vdev with unhealthy kids	*/
828 	VDEV_STATE_HEALTHY	/* Presumed good			*/
829 } vdev_state_t;
830 
831 #define	VDEV_STATE_ONLINE	VDEV_STATE_HEALTHY
832 
833 /*
834  * vdev aux states.  When a vdev is in the CANT_OPEN state, the aux field
835  * of the vdev stats structure uses these constants to distinguish why.
836  */
837 typedef enum vdev_aux {
838 	VDEV_AUX_NONE,		/* no error				*/
839 	VDEV_AUX_OPEN_FAILED,	/* ldi_open_*() or vn_open() failed	*/
840 	VDEV_AUX_CORRUPT_DATA,	/* bad label or disk contents		*/
841 	VDEV_AUX_NO_REPLICAS,	/* insufficient number of replicas	*/
842 	VDEV_AUX_BAD_GUID_SUM,	/* vdev guid sum doesn't match		*/
843 	VDEV_AUX_TOO_SMALL,	/* vdev size is too small		*/
844 	VDEV_AUX_BAD_LABEL,	/* the label is OK but invalid		*/
845 	VDEV_AUX_VERSION_NEWER,	/* on-disk version is too new		*/
846 	VDEV_AUX_VERSION_OLDER,	/* on-disk version is too old		*/
847 	VDEV_AUX_UNSUP_FEAT,	/* unsupported features			*/
848 	VDEV_AUX_SPARED,	/* hot spare used in another pool	*/
849 	VDEV_AUX_ERR_EXCEEDED,	/* too many errors			*/
850 	VDEV_AUX_IO_FAILURE,	/* experienced I/O failure		*/
851 	VDEV_AUX_BAD_LOG,	/* cannot read log chain(s)		*/
852 	VDEV_AUX_EXTERNAL,	/* external diagnosis			*/
853 	VDEV_AUX_SPLIT_POOL,	/* vdev was split off into another pool	*/
854 	VDEV_AUX_ACTIVE,	/* vdev active on a different host	*/
855 	VDEV_AUX_CHILDREN_OFFLINE, /* all children are offline		*/
856 	VDEV_AUX_BAD_ASHIFT	/* vdev ashift is invalid		*/
857 } vdev_aux_t;
858 
859 /*
860  * pool state.  The following states are written to disk as part of the normal
861  * SPA lifecycle: ACTIVE, EXPORTED, DESTROYED, SPARE, L2CACHE.  The remaining
862  * states are software abstractions used at various levels to communicate
863  * pool state.
864  */
865 typedef enum pool_state {
866 	POOL_STATE_ACTIVE = 0,		/* In active use		*/
867 	POOL_STATE_EXPORTED,		/* Explicitly exported		*/
868 	POOL_STATE_DESTROYED,		/* Explicitly destroyed		*/
869 	POOL_STATE_SPARE,		/* Reserved for hot spare use	*/
870 	POOL_STATE_L2CACHE,		/* Level 2 ARC device		*/
871 	POOL_STATE_UNINITIALIZED,	/* Internal spa_t state		*/
872 	POOL_STATE_UNAVAIL,		/* Internal libzfs state	*/
873 	POOL_STATE_POTENTIALLY_ACTIVE	/* Internal libzfs state	*/
874 } pool_state_t;
875 
876 /*
877  * mmp state. The following states provide additional detail describing
878  * why a pool couldn't be safely imported.
879  */
880 typedef enum mmp_state {
881 	MMP_STATE_ACTIVE = 0,		/* In active use		*/
882 	MMP_STATE_INACTIVE,		/* Inactive and safe to import	*/
883 	MMP_STATE_NO_HOSTID		/* System hostid is not set	*/
884 } mmp_state_t;
885 
886 /*
887  * Scan Functions.
888  */
889 typedef enum pool_scan_func {
890 	POOL_SCAN_NONE,
891 	POOL_SCAN_SCRUB,
892 	POOL_SCAN_RESILVER,
893 	POOL_SCAN_FUNCS
894 } pool_scan_func_t;
895 
896 /*
897  * Used to control scrub pause and resume.
898  */
899 typedef enum pool_scrub_cmd {
900 	POOL_SCRUB_NORMAL = 0,
901 	POOL_SCRUB_PAUSE,
902 	POOL_SCRUB_FLAGS_END
903 } pool_scrub_cmd_t;
904 
905 /*
906  * Initialize functions.
907  */
908 typedef enum pool_initialize_func {
909 	POOL_INITIALIZE_START,
910 	POOL_INITIALIZE_CANCEL,
911 	POOL_INITIALIZE_SUSPEND,
912 	POOL_INITIALIZE_FUNCS
913 } pool_initialize_func_t;
914 
915 /*
916  * TRIM functions.
917  */
918 typedef enum pool_trim_func {
919 	POOL_TRIM_START,
920 	POOL_TRIM_CANCEL,
921 	POOL_TRIM_SUSPEND,
922 	POOL_TRIM_FUNCS
923 } pool_trim_func_t;
924 
925 /*
926  * ZIO types.  Needed to interpret vdev statistics below.
927  */
928 typedef enum zio_type {
929 	ZIO_TYPE_NULL = 0,
930 	ZIO_TYPE_READ,
931 	ZIO_TYPE_WRITE,
932 	ZIO_TYPE_FREE,
933 	ZIO_TYPE_CLAIM,
934 	ZIO_TYPE_IOCTL,
935 	ZIO_TYPE_TRIM,
936 	ZIO_TYPES
937 } zio_type_t;
938 
939 /*
940  * Pool statistics.  Note: all fields should be 64-bit because this
941  * is passed between kernel and userland as an nvlist uint64 array.
942  */
943 typedef struct pool_scan_stat {
944 	/* values stored on disk */
945 	uint64_t	pss_func;	/* pool_scan_func_t */
946 	uint64_t	pss_state;	/* dsl_scan_state_t */
947 	uint64_t	pss_start_time;	/* scan start time */
948 	uint64_t	pss_end_time;	/* scan end time */
949 	uint64_t	pss_to_examine;	/* total bytes to scan */
950 	uint64_t	pss_examined;	/* total bytes located by scanner */
951 	uint64_t	pss_to_process; /* total bytes to process */
952 	uint64_t	pss_processed;	/* total processed bytes */
953 	uint64_t	pss_errors;	/* scan errors	*/
954 
955 	/* values not stored on disk */
956 	uint64_t	pss_pass_exam;	/* examined bytes per scan pass */
957 	uint64_t	pss_pass_issued; /* issued bytes per scan pass */
958 	uint64_t	pss_pass_start;	/* start time of a scan pass */
959 	uint64_t	pss_pass_scrub_pause; /* pause time of a scurb pass */
960 	/* cumulative time scrub spent paused, needed for rate calculation */
961 	uint64_t	pss_pass_scrub_spent_paused;
962 
963 	/* Sorted scrubbing new fields */
964 	/* Stored on disk */
965 	uint64_t	pss_issued;	/* total bytes checked by scanner */
966 } pool_scan_stat_t;
967 
968 /*
969  * Errata described by http://zfsonlinux.org/msg/ZFS-8000-ER.  The ordering
970  * of this enum must be maintained to ensure the errata identifiers map to
971  * the correct documentation.  New errata may only be appended to the list
972  * and must contain corresponding documentation at the above link.
973  */
974 typedef enum zpool_errata {
975 	ZPOOL_ERRATA_NONE,
976 	ZPOOL_ERRATA_ZOL_2094_SCRUB,
977 	ZPOOL_ERRATA_ZOL_2094_ASYNC_DESTROY,
978 	ZPOOL_ERRATA_ZOL_6845_ENCRYPTION,
979 	ZPOOL_ERRATA_ZOL_8308_ENCRYPTION,
980 } zpool_errata_t;
981 
982 typedef struct pool_removal_stat {
983 	uint64_t prs_state; /* dsl_scan_state_t */
984 	uint64_t prs_removing_vdev;
985 	uint64_t prs_start_time;
986 	uint64_t prs_end_time;
987 	uint64_t prs_to_copy; /* bytes that need to be copied */
988 	uint64_t prs_copied; /* bytes copied so far */
989 	/*
990 	 * bytes of memory used for indirect mappings.
991 	 * This includes all removed vdevs.
992 	 */
993 	uint64_t prs_mapping_memory;
994 } pool_removal_stat_t;
995 
996 typedef enum dsl_scan_state {
997 	DSS_NONE,
998 	DSS_SCANNING,
999 	DSS_FINISHED,
1000 	DSS_CANCELED,
1001 	DSS_NUM_STATES
1002 } dsl_scan_state_t;
1003 
1004 typedef enum {
1005 	CS_NONE,
1006 	CS_CHECKPOINT_EXISTS,
1007 	CS_CHECKPOINT_DISCARDING,
1008 	CS_NUM_STATES
1009 } checkpoint_state_t;
1010 
1011 typedef struct pool_checkpoint_stat {
1012 	uint64_t pcs_state;		/* checkpoint_state_t */
1013 	uint64_t pcs_start_time;	/* time checkpoint/discard started */
1014 	uint64_t pcs_space;		/* checkpointed space */
1015 } pool_checkpoint_stat_t;
1016 
1017 typedef enum {
1018 	VDEV_INITIALIZE_NONE,
1019 	VDEV_INITIALIZE_ACTIVE,
1020 	VDEV_INITIALIZE_CANCELED,
1021 	VDEV_INITIALIZE_SUSPENDED,
1022 	VDEV_INITIALIZE_COMPLETE
1023 } vdev_initializing_state_t;
1024 
1025 typedef enum {
1026 	VDEV_TRIM_NONE,
1027 	VDEV_TRIM_ACTIVE,
1028 	VDEV_TRIM_CANCELED,
1029 	VDEV_TRIM_SUSPENDED,
1030 	VDEV_TRIM_COMPLETE,
1031 } vdev_trim_state_t;
1032 
1033 /*
1034  * Vdev statistics.  Note: all fields should be 64-bit because this
1035  * is passed between kernel and user land as an nvlist uint64 array.
1036  *
1037  * The vs_ops[] and vs_bytes[] arrays must always be an array size of 6 in
1038  * order to keep subsequent members at their known fixed offsets.  When
1039  * adding a new field it must be added to the end the structure.
1040  */
1041 #define	VS_ZIO_TYPES	6
1042 
1043 typedef struct vdev_stat {
1044 	hrtime_t	vs_timestamp;		/* time since vdev load	*/
1045 	uint64_t	vs_state;		/* vdev state		*/
1046 	uint64_t	vs_aux;			/* see vdev_aux_t	*/
1047 	uint64_t	vs_alloc;		/* space allocated	*/
1048 	uint64_t	vs_space;		/* total capacity	*/
1049 	uint64_t	vs_dspace;		/* deflated capacity	*/
1050 	uint64_t	vs_rsize;		/* replaceable dev size */
1051 	uint64_t	vs_esize;		/* expandable dev size */
1052 	uint64_t	vs_ops[VS_ZIO_TYPES];	/* operation count	*/
1053 	uint64_t	vs_bytes[VS_ZIO_TYPES];	/* bytes read/written	*/
1054 	uint64_t	vs_read_errors;		/* read errors		*/
1055 	uint64_t	vs_write_errors;	/* write errors		*/
1056 	uint64_t	vs_checksum_errors;	/* checksum errors	*/
1057 	uint64_t	vs_initialize_errors;	/* initializing errors	*/
1058 	uint64_t	vs_self_healed;		/* self-healed bytes	*/
1059 	uint64_t	vs_scan_removing;	/* removing?	*/
1060 	uint64_t	vs_scan_processed;	/* scan processed bytes	*/
1061 	uint64_t	vs_fragmentation;	/* device fragmentation */
1062 	uint64_t	vs_initialize_bytes_done; /* bytes initialized */
1063 	uint64_t	vs_initialize_bytes_est; /* total bytes to initialize */
1064 	uint64_t	vs_initialize_state;	/* vdev_initialzing_state_t */
1065 	uint64_t	vs_initialize_action_time; /* time_t */
1066 	uint64_t	vs_checkpoint_space;    /* checkpoint-consumed space */
1067 	uint64_t	vs_resilver_deferred;	/* resilver deferred	*/
1068 	uint64_t	vs_slow_ios;		/* slow IOs */
1069 	uint64_t	vs_trim_errors;		/* trimming errors	*/
1070 	uint64_t	vs_trim_notsup;		/* supported by device */
1071 	uint64_t	vs_trim_bytes_done;	/* bytes trimmed */
1072 	uint64_t	vs_trim_bytes_est;	/* total bytes to trim */
1073 	uint64_t	vs_trim_state;		/* vdev_trim_state_t */
1074 	uint64_t	vs_trim_action_time;	/* time_t */
1075 } vdev_stat_t;
1076 
1077 /*
1078  * Extended stats
1079  *
1080  * These are stats which aren't included in the original iostat output.  For
1081  * convenience, they are grouped together in vdev_stat_ex, although each stat
1082  * is individually exported as a nvlist.
1083  */
1084 typedef struct vdev_stat_ex {
1085 	/* Number of ZIOs issued to disk and waiting to finish */
1086 	uint64_t vsx_active_queue[ZIO_PRIORITY_N_QUEUEABLE];
1087 
1088 	/* Number of ZIOs pending to be issued to disk */
1089 	uint64_t vsx_pend_queue[ZIO_PRIORITY_N_QUEUEABLE];
1090 
1091 	/*
1092 	 * Below are the histograms for various latencies. Buckets are in
1093 	 * units of nanoseconds.
1094 	 */
1095 
1096 	/*
1097 	 * 2^37 nanoseconds = 134s. Timeouts will probably start kicking in
1098 	 * before this.
1099 	 */
1100 #define	VDEV_L_HISTO_BUCKETS	37	/* Latency histo buckets */
1101 #define	VDEV_RQ_HISTO_BUCKETS	25	/* Request size histo buckets */
1102 
1103 	/* Amount of time in ZIO queue (ns) */
1104 	uint64_t vsx_queue_histo[ZIO_PRIORITY_N_QUEUEABLE]
1105 	    [VDEV_L_HISTO_BUCKETS];
1106 
1107 	/* Total ZIO latency (ns).  Includes queuing and disk access time */
1108 	uint64_t vsx_total_histo[ZIO_TYPES][VDEV_L_HISTO_BUCKETS];
1109 
1110 	/* Amount of time to read/write the disk (ns) */
1111 	uint64_t vsx_disk_histo[ZIO_TYPES][VDEV_L_HISTO_BUCKETS];
1112 
1113 	/* "lookup the bucket for a value" macro */
1114 #define	HISTO(val, buckets)	(val != 0 ? MIN(highbit64(val) - 1, \
1115 	    buckets - 1) : 0)
1116 #define	L_HISTO(a)	HISTO(a, VDEV_L_HISTO_BUCKETS)
1117 #define	RQ_HISTO(a)	HISTO(a, VDEV_RQ_HISTO_BUCKETS)
1118 
1119 	/* Physical IO histogram */
1120 	uint64_t vsx_ind_histo[ZIO_PRIORITY_N_QUEUEABLE]
1121 	    [VDEV_RQ_HISTO_BUCKETS];
1122 
1123 	/* Delegated (aggregated) physical IO histogram */
1124 	uint64_t vsx_agg_histo[ZIO_PRIORITY_N_QUEUEABLE]
1125 	    [VDEV_RQ_HISTO_BUCKETS];
1126 
1127 } vdev_stat_ex_t;
1128 
1129 /*
1130  * DDT statistics.  Note: all fields should be 64-bit because this
1131  * is passed between kernel and userland as an nvlist uint64 array.
1132  */
1133 typedef struct ddt_object {
1134 	uint64_t	ddo_count;	/* number of elments in ddt	*/
1135 	uint64_t	ddo_dspace;	/* size of ddt on disk		*/
1136 	uint64_t	ddo_mspace;	/* size of ddt in-core		*/
1137 } ddt_object_t;
1138 
1139 typedef struct ddt_stat {
1140 	uint64_t	dds_blocks;	/* blocks			*/
1141 	uint64_t	dds_lsize;	/* logical size			*/
1142 	uint64_t	dds_psize;	/* physical size		*/
1143 	uint64_t	dds_dsize;	/* deflated allocated size	*/
1144 	uint64_t	dds_ref_blocks;	/* referenced blocks		*/
1145 	uint64_t	dds_ref_lsize;	/* referenced lsize * refcnt	*/
1146 	uint64_t	dds_ref_psize;	/* referenced psize * refcnt	*/
1147 	uint64_t	dds_ref_dsize;	/* referenced dsize * refcnt	*/
1148 } ddt_stat_t;
1149 
1150 typedef struct ddt_histogram {
1151 	ddt_stat_t	ddh_stat[64];	/* power-of-two histogram buckets */
1152 } ddt_histogram_t;
1153 
1154 #define	ZVOL_DRIVER	"zvol"
1155 #define	ZFS_DRIVER	"zfs"
1156 #define	ZFS_DEV		"/dev/zfs"
1157 #define	ZFS_DISK_ROOT	"/dev/dsk"
1158 #define	ZFS_DISK_ROOTD	ZFS_DISK_ROOT "/"
1159 #define	ZFS_RDISK_ROOT	"/dev/rdsk"
1160 #define	ZFS_RDISK_ROOTD	ZFS_RDISK_ROOT "/"
1161 
1162 /* general zvol path */
1163 #define	ZVOL_DIR		"/dev/zvol"
1164 /* expansion */
1165 #define	ZVOL_PSEUDO_DEV		"/devices/pseudo/zfs@0:"
1166 /* for dump and swap */
1167 #define	ZVOL_FULL_DEV_DIR	ZVOL_DIR "/dsk/"
1168 #define	ZVOL_FULL_RDEV_DIR	ZVOL_DIR "/rdsk/"
1169 
1170 #define	ZVOL_PROP_NAME		"name"
1171 #define	ZVOL_DEFAULT_BLOCKSIZE	8192
1172 
1173 /*
1174  * /dev/zfs ioctl numbers.
1175  */
1176 typedef enum zfs_ioc {
1177 	/*
1178 	 * Core features - 81/128 numbers reserved.
1179 	 */
1180 #ifdef __FreeBSD__
1181 	ZFS_IOC_FIRST = 0,
1182 #else
1183 	ZFS_IOC_FIRST =	('Z' << 8),
1184 #endif
1185 	ZFS_IOC = ZFS_IOC_FIRST,
1186 	ZFS_IOC_POOL_CREATE = ZFS_IOC_FIRST,	/* 0x5a00 */
1187 	ZFS_IOC_POOL_DESTROY,			/* 0x5a01 */
1188 	ZFS_IOC_POOL_IMPORT,			/* 0x5a02 */
1189 	ZFS_IOC_POOL_EXPORT,			/* 0x5a03 */
1190 	ZFS_IOC_POOL_CONFIGS,			/* 0x5a04 */
1191 	ZFS_IOC_POOL_STATS,			/* 0x5a05 */
1192 	ZFS_IOC_POOL_TRYIMPORT,			/* 0x5a06 */
1193 	ZFS_IOC_POOL_SCAN,			/* 0x5a07 */
1194 	ZFS_IOC_POOL_FREEZE,			/* 0x5a08 */
1195 	ZFS_IOC_POOL_UPGRADE,			/* 0x5a09 */
1196 	ZFS_IOC_POOL_GET_HISTORY,		/* 0x5a0a */
1197 	ZFS_IOC_VDEV_ADD,			/* 0x5a0b */
1198 	ZFS_IOC_VDEV_REMOVE,			/* 0x5a0c */
1199 	ZFS_IOC_VDEV_SET_STATE,			/* 0x5a0d */
1200 	ZFS_IOC_VDEV_ATTACH,			/* 0x5a0e */
1201 	ZFS_IOC_VDEV_DETACH,			/* 0x5a0f */
1202 	ZFS_IOC_VDEV_SETPATH,			/* 0x5a10 */
1203 	ZFS_IOC_VDEV_SETFRU,			/* 0x5a11 */
1204 	ZFS_IOC_OBJSET_STATS,			/* 0x5a12 */
1205 	ZFS_IOC_OBJSET_ZPLPROPS,		/* 0x5a13 */
1206 	ZFS_IOC_DATASET_LIST_NEXT,		/* 0x5a14 */
1207 	ZFS_IOC_SNAPSHOT_LIST_NEXT,		/* 0x5a15 */
1208 	ZFS_IOC_SET_PROP,			/* 0x5a16 */
1209 	ZFS_IOC_CREATE,				/* 0x5a17 */
1210 	ZFS_IOC_DESTROY,			/* 0x5a18 */
1211 	ZFS_IOC_ROLLBACK,			/* 0x5a19 */
1212 	ZFS_IOC_RENAME,				/* 0x5a1a */
1213 	ZFS_IOC_RECV,				/* 0x5a1b */
1214 	ZFS_IOC_SEND,				/* 0x5a1c */
1215 	ZFS_IOC_INJECT_FAULT,			/* 0x5a1d */
1216 	ZFS_IOC_CLEAR_FAULT,			/* 0x5a1e */
1217 	ZFS_IOC_INJECT_LIST_NEXT,		/* 0x5a1f */
1218 	ZFS_IOC_ERROR_LOG,			/* 0x5a20 */
1219 	ZFS_IOC_CLEAR,				/* 0x5a21 */
1220 	ZFS_IOC_PROMOTE,			/* 0x5a22 */
1221 	ZFS_IOC_SNAPSHOT,			/* 0x5a23 */
1222 	ZFS_IOC_DSOBJ_TO_DSNAME,		/* 0x5a24 */
1223 	ZFS_IOC_OBJ_TO_PATH,			/* 0x5a25 */
1224 	ZFS_IOC_POOL_SET_PROPS,			/* 0x5a26 */
1225 	ZFS_IOC_POOL_GET_PROPS,			/* 0x5a27 */
1226 	ZFS_IOC_SET_FSACL,			/* 0x5a28 */
1227 	ZFS_IOC_GET_FSACL,			/* 0x5a29 */
1228 	ZFS_IOC_SHARE,				/* 0x5a2a */
1229 	ZFS_IOC_INHERIT_PROP,			/* 0x5a2b */
1230 	ZFS_IOC_SMB_ACL,			/* 0x5a2c */
1231 	ZFS_IOC_USERSPACE_ONE,			/* 0x5a2d */
1232 	ZFS_IOC_USERSPACE_MANY,			/* 0x5a2e */
1233 	ZFS_IOC_USERSPACE_UPGRADE,		/* 0x5a2f */
1234 	ZFS_IOC_HOLD,				/* 0x5a30 */
1235 	ZFS_IOC_RELEASE,			/* 0x5a31 */
1236 	ZFS_IOC_GET_HOLDS,			/* 0x5a32 */
1237 	ZFS_IOC_OBJSET_RECVD_PROPS,		/* 0x5a33 */
1238 	ZFS_IOC_VDEV_SPLIT,			/* 0x5a34 */
1239 	ZFS_IOC_NEXT_OBJ,			/* 0x5a35 */
1240 	ZFS_IOC_DIFF,				/* 0x5a36 */
1241 	ZFS_IOC_TMP_SNAPSHOT,			/* 0x5a37 */
1242 	ZFS_IOC_OBJ_TO_STATS,			/* 0x5a38 */
1243 	ZFS_IOC_SPACE_WRITTEN,			/* 0x5a39 */
1244 	ZFS_IOC_SPACE_SNAPS,			/* 0x5a3a */
1245 	ZFS_IOC_DESTROY_SNAPS,			/* 0x5a3b */
1246 	ZFS_IOC_POOL_REGUID,			/* 0x5a3c */
1247 	ZFS_IOC_POOL_REOPEN,			/* 0x5a3d */
1248 	ZFS_IOC_SEND_PROGRESS,			/* 0x5a3e */
1249 	ZFS_IOC_LOG_HISTORY,			/* 0x5a3f */
1250 	ZFS_IOC_SEND_NEW,			/* 0x5a40 */
1251 	ZFS_IOC_SEND_SPACE,			/* 0x5a41 */
1252 	ZFS_IOC_CLONE,				/* 0x5a42 */
1253 	ZFS_IOC_BOOKMARK,			/* 0x5a43 */
1254 	ZFS_IOC_GET_BOOKMARKS,			/* 0x5a44 */
1255 	ZFS_IOC_DESTROY_BOOKMARKS,		/* 0x5a45 */
1256 	ZFS_IOC_POOL_SYNC,			/* 0x5a47 */
1257 	ZFS_IOC_CHANNEL_PROGRAM,		/* 0x5a48 */
1258 	ZFS_IOC_LOAD_KEY,			/* 0x5a49 */
1259 	ZFS_IOC_UNLOAD_KEY,			/* 0x5a4a */
1260 	ZFS_IOC_CHANGE_KEY,			/* 0x5a4b */
1261 	ZFS_IOC_REMAP,				/* 0x5a4c */
1262 	ZFS_IOC_POOL_CHECKPOINT,		/* 0x5a4d */
1263 	ZFS_IOC_POOL_DISCARD_CHECKPOINT,	/* 0x5a4e */
1264 	ZFS_IOC_POOL_INITIALIZE,		/* 0x5a4f */
1265 	ZFS_IOC_POOL_TRIM,			/* 0x5a50 */
1266 	ZFS_IOC_REDACT,				/* 0x5a51 */
1267 	ZFS_IOC_GET_BOOKMARK_PROPS,		/* 0x5a52 */
1268 
1269 	/*
1270 	 * Per-platform (Optional) - 8/128 numbers reserved.
1271 	 */
1272 	ZFS_IOC_PLATFORM = ZFS_IOC_FIRST + 0x80,
1273 	ZFS_IOC_EVENTS_NEXT,			/* 0x81 (Linux) */
1274 	ZFS_IOC_EVENTS_CLEAR,			/* 0x82 (Linux) */
1275 	ZFS_IOC_EVENTS_SEEK,			/* 0x83 (Linux) */
1276 	ZFS_IOC_NEXTBOOT,			/* 0x84 (FreeBSD) */
1277 	ZFS_IOC_JAIL,				/* 0x85 (FreeBSD) */
1278 	ZFS_IOC_UNJAIL,				/* 0x86 (FreeBSD) */
1279 	ZFS_IOC_SET_BOOTENV,			/* 0x87 */
1280 	ZFS_IOC_GET_BOOTENV,			/* 0x88 */
1281 	ZFS_IOC_LAST
1282 } zfs_ioc_t;
1283 
1284 /*
1285  * ZFS-specific error codes used for returning descriptive errors
1286  * to the userland through zfs ioctls.
1287  *
1288  * The enum implicitly includes all the error codes from errno.h.
1289  * New code should use and extend this enum for errors that are
1290  * not described precisely by generic errno codes.
1291  */
1292 typedef enum {
1293 	ZFS_ERR_CHECKPOINT_EXISTS = 1024,
1294 	ZFS_ERR_DISCARDING_CHECKPOINT,
1295 	ZFS_ERR_NO_CHECKPOINT,
1296 	ZFS_ERR_DEVRM_IN_PROGRESS,
1297 	ZFS_ERR_VDEV_TOO_BIG,
1298 	ZFS_ERR_FROM_IVSET_GUID_MISSING,
1299 	ZFS_ERR_FROM_IVSET_GUID_MISMATCH,
1300 	ZFS_ERR_SPILL_BLOCK_FLAG_MISSING,
1301 	ZFS_ERR_UNKNOWN_SEND_STREAM_FEATURE,
1302 	ZFS_ERR_IOC_CMD_UNAVAIL,
1303 	ZFS_ERR_IOC_ARG_UNAVAIL,
1304 	ZFS_ERR_IOC_ARG_REQUIRED,
1305 	ZFS_ERR_IOC_ARG_BADTYPE,
1306 } zfs_errno_t;
1307 
1308 /*
1309  * Internal SPA load state.  Used by FMA diagnosis engine.
1310  */
1311 typedef enum {
1312 	SPA_LOAD_NONE,		/* no load in progress	*/
1313 	SPA_LOAD_OPEN,		/* normal open		*/
1314 	SPA_LOAD_IMPORT,	/* import in progress	*/
1315 	SPA_LOAD_TRYIMPORT,	/* tryimport in progress */
1316 	SPA_LOAD_RECOVER,	/* recovery requested	*/
1317 	SPA_LOAD_ERROR,		/* load failed		*/
1318 	SPA_LOAD_CREATE		/* creation in progress */
1319 } spa_load_state_t;
1320 
1321 /* supported encryption algorithms */
1322 enum zio_encrypt {
1323 	ZIO_CRYPT_INHERIT = 0,
1324 	ZIO_CRYPT_ON,
1325 	ZIO_CRYPT_OFF,
1326 	ZIO_CRYPT_AES_128_CCM,
1327 	ZIO_CRYPT_AES_192_CCM,
1328 	ZIO_CRYPT_AES_256_CCM,
1329 	ZIO_CRYPT_AES_128_GCM,
1330 	ZIO_CRYPT_AES_192_GCM,
1331 	ZIO_CRYPT_AES_256_GCM,
1332 	ZIO_CRYPT_FUNCTIONS
1333 };
1334 
1335 /*
1336  * Bookmark name values.
1337  */
1338 #define	ZPOOL_ERR_LIST		"error list"
1339 #define	ZPOOL_ERR_DATASET	"dataset"
1340 #define	ZPOOL_ERR_OBJECT	"object"
1341 
1342 #define	HIS_MAX_RECORD_LEN	(MAXPATHLEN + MAXPATHLEN + 1)
1343 
1344 /*
1345  * The following are names used in the nvlist describing
1346  * the pool's history log.
1347  */
1348 #define	ZPOOL_HIST_RECORD	"history record"
1349 #define	ZPOOL_HIST_TIME		"history time"
1350 #define	ZPOOL_HIST_CMD		"history command"
1351 #define	ZPOOL_HIST_WHO		"history who"
1352 #define	ZPOOL_HIST_ZONE		"history zone"
1353 #define	ZPOOL_HIST_HOST		"history hostname"
1354 #define	ZPOOL_HIST_TXG		"history txg"
1355 #define	ZPOOL_HIST_INT_EVENT	"history internal event"
1356 #define	ZPOOL_HIST_INT_STR	"history internal str"
1357 #define	ZPOOL_HIST_INT_NAME	"internal_name"
1358 #define	ZPOOL_HIST_IOCTL	"ioctl"
1359 #define	ZPOOL_HIST_INPUT_NVL	"in_nvl"
1360 #define	ZPOOL_HIST_OUTPUT_NVL	"out_nvl"
1361 #define	ZPOOL_HIST_DSNAME	"dsname"
1362 #define	ZPOOL_HIST_DSID		"dsid"
1363 #define	ZPOOL_HIST_ERRNO	"errno"
1364 
1365 /*
1366  * The following are names used when invoking ZFS_IOC_POOL_INITIALIZE.
1367  */
1368 #define	ZPOOL_INITIALIZE_COMMAND	"initialize_command"
1369 #define	ZPOOL_INITIALIZE_VDEVS		"initialize_vdevs"
1370 
1371 /*
1372  * Special nvlist name that will not have its args recorded in the pool's
1373  * history log.
1374  */
1375 #define	ZPOOL_HIDDEN_ARGS	"hidden_args"
1376 
1377 /*
1378  * The following are names used when invoking ZFS_IOC_POOL_TRIM.
1379  */
1380 #define	ZPOOL_TRIM_COMMAND		"trim_command"
1381 #define	ZPOOL_TRIM_VDEVS		"trim_vdevs"
1382 #define	ZPOOL_TRIM_RATE			"trim_rate"
1383 #define	ZPOOL_TRIM_SECURE		"trim_secure"
1384 
1385 /*
1386  * Flags for ZFS_IOC_VDEV_SET_STATE
1387  */
1388 #define	ZFS_ONLINE_CHECKREMOVE	0x1
1389 #define	ZFS_ONLINE_UNSPARE	0x2
1390 #define	ZFS_ONLINE_FORCEFAULT	0x4
1391 #define	ZFS_ONLINE_EXPAND	0x8
1392 #define	ZFS_OFFLINE_TEMPORARY	0x1
1393 
1394 /*
1395  * Flags for ZFS_IOC_POOL_IMPORT
1396  */
1397 #define	ZFS_IMPORT_NORMAL	0x0
1398 #define	ZFS_IMPORT_VERBATIM	0x1
1399 #define	ZFS_IMPORT_ANY_HOST	0x2
1400 #define	ZFS_IMPORT_MISSING_LOG	0x4
1401 #define	ZFS_IMPORT_ONLY		0x8
1402 #define	ZFS_IMPORT_CHECKPOINT	0x10
1403 #define	ZFS_IMPORT_TEMP_NAME	0x20
1404 #define	ZFS_IMPORT_SKIP_MMP	0x40
1405 #define	ZFS_IMPORT_LOAD_KEYS	0x80
1406 
1407 /*
1408  * Channel program argument/return nvlist keys and defaults.
1409  */
1410 #define	ZCP_ARG_PROGRAM		"program"
1411 #define	ZCP_ARG_ARGLIST		"arg"
1412 #define	ZCP_ARG_SYNC		"sync"
1413 #define	ZCP_ARG_INSTRLIMIT	"instrlimit"
1414 #define	ZCP_ARG_MEMLIMIT	"memlimit"
1415 
1416 #define	ZCP_ARG_CLIARGV		"argv"
1417 
1418 #define	ZCP_RET_ERROR		"error"
1419 #define	ZCP_RET_RETURN		"return"
1420 
1421 #define	ZCP_DEFAULT_INSTRLIMIT	(10 * 1000 * 1000)
1422 #define	ZCP_MAX_INSTRLIMIT	(10 * ZCP_DEFAULT_INSTRLIMIT)
1423 #define	ZCP_DEFAULT_MEMLIMIT	(10 * 1024 * 1024)
1424 #define	ZCP_MAX_MEMLIMIT	(10 * ZCP_DEFAULT_MEMLIMIT)
1425 
1426 /*
1427  * Sysevent payload members.  ZFS will generate the following sysevents with the
1428  * given payloads:
1429  *
1430  *	ESC_ZFS_RESILVER_START
1431  *	ESC_ZFS_RESILVER_END
1432  *	ESC_ZFS_POOL_DESTROY
1433  *	ESC_ZFS_POOL_REGUID
1434  *
1435  *		ZFS_EV_POOL_NAME	DATA_TYPE_STRING
1436  *		ZFS_EV_POOL_GUID	DATA_TYPE_UINT64
1437  *
1438  *	ESC_ZFS_VDEV_REMOVE
1439  *	ESC_ZFS_VDEV_CLEAR
1440  *	ESC_ZFS_VDEV_CHECK
1441  *
1442  *		ZFS_EV_POOL_NAME	DATA_TYPE_STRING
1443  *		ZFS_EV_POOL_GUID	DATA_TYPE_UINT64
1444  *		ZFS_EV_VDEV_PATH	DATA_TYPE_STRING	(optional)
1445  *		ZFS_EV_VDEV_GUID	DATA_TYPE_UINT64
1446  *
1447  *	ESC_ZFS_HISTORY_EVENT
1448  *
1449  *		ZFS_EV_POOL_NAME	DATA_TYPE_STRING
1450  *		ZFS_EV_POOL_GUID	DATA_TYPE_UINT64
1451  *		ZFS_EV_HIST_TIME	DATA_TYPE_UINT64	(optional)
1452  *		ZFS_EV_HIST_CMD		DATA_TYPE_STRING	(optional)
1453  *		ZFS_EV_HIST_WHO		DATA_TYPE_UINT64	(optional)
1454  *		ZFS_EV_HIST_ZONE	DATA_TYPE_STRING	(optional)
1455  *		ZFS_EV_HIST_HOST	DATA_TYPE_STRING	(optional)
1456  *		ZFS_EV_HIST_TXG		DATA_TYPE_UINT64	(optional)
1457  *		ZFS_EV_HIST_INT_EVENT	DATA_TYPE_UINT64	(optional)
1458  *		ZFS_EV_HIST_INT_STR	DATA_TYPE_STRING	(optional)
1459  *		ZFS_EV_HIST_INT_NAME	DATA_TYPE_STRING	(optional)
1460  *		ZFS_EV_HIST_IOCTL	DATA_TYPE_STRING	(optional)
1461  *		ZFS_EV_HIST_DSNAME	DATA_TYPE_STRING	(optional)
1462  *		ZFS_EV_HIST_DSID	DATA_TYPE_UINT64	(optional)
1463  *
1464  * The ZFS_EV_HIST_* members will correspond to the ZPOOL_HIST_* members in the
1465  * history log nvlist.  The keynames will be free of any spaces or other
1466  * characters that could be potentially unexpected to consumers of the
1467  * sysevents.
1468  */
1469 #define	ZFS_EV_POOL_NAME	"pool_name"
1470 #define	ZFS_EV_POOL_GUID	"pool_guid"
1471 #define	ZFS_EV_VDEV_PATH	"vdev_path"
1472 #define	ZFS_EV_VDEV_GUID	"vdev_guid"
1473 #define	ZFS_EV_HIST_TIME	"history_time"
1474 #define	ZFS_EV_HIST_CMD		"history_command"
1475 #define	ZFS_EV_HIST_WHO		"history_who"
1476 #define	ZFS_EV_HIST_ZONE	"history_zone"
1477 #define	ZFS_EV_HIST_HOST	"history_hostname"
1478 #define	ZFS_EV_HIST_TXG		"history_txg"
1479 #define	ZFS_EV_HIST_INT_EVENT	"history_internal_event"
1480 #define	ZFS_EV_HIST_INT_STR	"history_internal_str"
1481 #define	ZFS_EV_HIST_INT_NAME	"history_internal_name"
1482 #define	ZFS_EV_HIST_IOCTL	"history_ioctl"
1483 #define	ZFS_EV_HIST_DSNAME	"history_dsname"
1484 #define	ZFS_EV_HIST_DSID	"history_dsid"
1485 
1486 #ifdef	__cplusplus
1487 }
1488 #endif
1489 
1490 #endif	/* _SYS_FS_ZFS_H */
1491