xref: /titanic_51/usr/src/uts/common/sys/fs/zfs.h (revision e764248d4606662e466d4ee282fa5ef20e3dc578)
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, 2014 by Delphix. All rights reserved.
25  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
26  * Copyright (c) 2013, Joyent, Inc. All rights reserved.
27  * Copyright (c) 2014 Integros [integros.com]
28  */
29 
30 /* Portions Copyright 2010 Robert Milkowski */
31 
32 #ifndef	_SYS_FS_ZFS_H
33 #define	_SYS_FS_ZFS_H
34 
35 #include <sys/time.h>
36 
37 #ifdef	__cplusplus
38 extern "C" {
39 #endif
40 
41 /*
42  * Types and constants shared between userland and the kernel.
43  */
44 
45 /*
46  * Each dataset can be one of the following types.  These constants can be
47  * combined into masks that can be passed to various functions.
48  */
49 typedef enum {
50 	ZFS_TYPE_FILESYSTEM	= (1 << 0),
51 	ZFS_TYPE_SNAPSHOT	= (1 << 1),
52 	ZFS_TYPE_VOLUME		= (1 << 2),
53 	ZFS_TYPE_POOL		= (1 << 3),
54 	ZFS_TYPE_BOOKMARK	= (1 << 4)
55 } zfs_type_t;
56 
57 typedef enum dmu_objset_type {
58 	DMU_OST_NONE,
59 	DMU_OST_META,
60 	DMU_OST_ZFS,
61 	DMU_OST_ZVOL,
62 	DMU_OST_OTHER,			/* For testing only! */
63 	DMU_OST_ANY,			/* Be careful! */
64 	DMU_OST_NUMTYPES
65 } dmu_objset_type_t;
66 
67 #define	ZFS_TYPE_DATASET	\
68 	(ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME | ZFS_TYPE_SNAPSHOT)
69 
70 /*
71  * All of these include the terminating NUL byte.
72  */
73 #define	ZAP_MAXNAMELEN 256
74 #define	ZAP_MAXVALUELEN (1024 * 8)
75 #define	ZAP_OLDMAXVALUELEN 1024
76 #define	ZFS_MAX_DATASET_NAME_LEN 256
77 
78 /*
79  * Dataset properties are identified by these constants and must be added to
80  * the end of this list to ensure that external consumers are not affected
81  * by the change. If you make any changes to this list, be sure to update
82  * the property table in usr/src/common/zfs/zfs_prop.c.
83  */
84 typedef enum {
85 	ZFS_PROP_BAD = -1,
86 	ZFS_PROP_TYPE = 0,
87 	ZFS_PROP_CREATION,
88 	ZFS_PROP_USED,
89 	ZFS_PROP_AVAILABLE,
90 	ZFS_PROP_REFERENCED,
91 	ZFS_PROP_COMPRESSRATIO,
92 	ZFS_PROP_MOUNTED,
93 	ZFS_PROP_ORIGIN,
94 	ZFS_PROP_QUOTA,
95 	ZFS_PROP_RESERVATION,
96 	ZFS_PROP_VOLSIZE,
97 	ZFS_PROP_VOLBLOCKSIZE,
98 	ZFS_PROP_RECORDSIZE,
99 	ZFS_PROP_MOUNTPOINT,
100 	ZFS_PROP_SHARENFS,
101 	ZFS_PROP_CHECKSUM,
102 	ZFS_PROP_COMPRESSION,
103 	ZFS_PROP_ATIME,
104 	ZFS_PROP_DEVICES,
105 	ZFS_PROP_EXEC,
106 	ZFS_PROP_SETUID,
107 	ZFS_PROP_READONLY,
108 	ZFS_PROP_ZONED,
109 	ZFS_PROP_SNAPDIR,
110 	ZFS_PROP_ACLMODE,
111 	ZFS_PROP_ACLINHERIT,
112 	ZFS_PROP_CREATETXG,		/* not exposed to the user */
113 	ZFS_PROP_NAME,			/* not exposed to the user */
114 	ZFS_PROP_CANMOUNT,
115 	ZFS_PROP_ISCSIOPTIONS,		/* not exposed to the user */
116 	ZFS_PROP_XATTR,
117 	ZFS_PROP_NUMCLONES,		/* not exposed to the user */
118 	ZFS_PROP_COPIES,
119 	ZFS_PROP_VERSION,
120 	ZFS_PROP_UTF8ONLY,
121 	ZFS_PROP_NORMALIZE,
122 	ZFS_PROP_CASE,
123 	ZFS_PROP_VSCAN,
124 	ZFS_PROP_NBMAND,
125 	ZFS_PROP_SHARESMB,
126 	ZFS_PROP_REFQUOTA,
127 	ZFS_PROP_REFRESERVATION,
128 	ZFS_PROP_GUID,
129 	ZFS_PROP_PRIMARYCACHE,
130 	ZFS_PROP_SECONDARYCACHE,
131 	ZFS_PROP_USEDSNAP,
132 	ZFS_PROP_USEDDS,
133 	ZFS_PROP_USEDCHILD,
134 	ZFS_PROP_USEDREFRESERV,
135 	ZFS_PROP_USERACCOUNTING,	/* not exposed to the user */
136 	ZFS_PROP_STMF_SHAREINFO,	/* not exposed to the user */
137 	ZFS_PROP_DEFER_DESTROY,
138 	ZFS_PROP_USERREFS,
139 	ZFS_PROP_LOGBIAS,
140 	ZFS_PROP_UNIQUE,		/* not exposed to the user */
141 	ZFS_PROP_OBJSETID,		/* not exposed to the user */
142 	ZFS_PROP_DEDUP,
143 	ZFS_PROP_MLSLABEL,
144 	ZFS_PROP_SYNC,
145 	ZFS_PROP_REFRATIO,
146 	ZFS_PROP_WRITTEN,
147 	ZFS_PROP_CLONES,
148 	ZFS_PROP_LOGICALUSED,
149 	ZFS_PROP_LOGICALREFERENCED,
150 	ZFS_PROP_INCONSISTENT,		/* not exposed to the user */
151 	ZFS_PROP_FILESYSTEM_LIMIT,
152 	ZFS_PROP_SNAPSHOT_LIMIT,
153 	ZFS_PROP_FILESYSTEM_COUNT,
154 	ZFS_PROP_SNAPSHOT_COUNT,
155 	ZFS_PROP_REDUNDANT_METADATA,
156 	ZFS_PROP_PREV_SNAP,
157 	ZFS_PROP_RECEIVE_RESUME_TOKEN,
158 	ZFS_PROP_FOLLOW,
159 	ZFS_NUM_PROPS
160 } zfs_prop_t;
161 
162 typedef enum {
163 	ZFS_PROP_USERUSED,
164 	ZFS_PROP_USERQUOTA,
165 	ZFS_PROP_GROUPUSED,
166 	ZFS_PROP_GROUPQUOTA,
167 	ZFS_NUM_USERQUOTA_PROPS
168 } zfs_userquota_prop_t;
169 
170 extern const char *zfs_userquota_prop_prefixes[ZFS_NUM_USERQUOTA_PROPS];
171 
172 /*
173  * Pool properties are identified by these constants and must be added to the
174  * end of this list to ensure that external consumers are not affected
175  * by the change. If you make any changes to this list, be sure to update
176  * the property table in usr/src/common/zfs/zpool_prop.c.
177  */
178 typedef enum {
179 	ZPOOL_PROP_NAME,
180 	ZPOOL_PROP_SIZE,
181 	ZPOOL_PROP_CAPACITY,
182 	ZPOOL_PROP_ALTROOT,
183 	ZPOOL_PROP_HEALTH,
184 	ZPOOL_PROP_GUID,
185 	ZPOOL_PROP_VERSION,
186 	ZPOOL_PROP_BOOTFS,
187 	ZPOOL_PROP_DELEGATION,
188 	ZPOOL_PROP_AUTOREPLACE,
189 	ZPOOL_PROP_CACHEFILE,
190 	ZPOOL_PROP_FAILUREMODE,
191 	ZPOOL_PROP_LISTSNAPS,
192 	ZPOOL_PROP_AUTOEXPAND,
193 	ZPOOL_PROP_DEDUPDITTO,
194 	ZPOOL_PROP_DEDUPRATIO,
195 	ZPOOL_PROP_FREE,
196 	ZPOOL_PROP_ALLOCATED,
197 	ZPOOL_PROP_READONLY,
198 	ZPOOL_PROP_COMMENT,
199 	ZPOOL_PROP_EXPANDSZ,
200 	ZPOOL_PROP_FREEING,
201 	ZPOOL_PROP_FRAGMENTATION,
202 	ZPOOL_PROP_LEAKED,
203 	ZPOOL_PROP_MAXBLOCKSIZE,
204 	ZPOOL_NUM_PROPS
205 } zpool_prop_t;
206 
207 /* Small enough to not hog a whole line of printout in zpool(1M). */
208 #define	ZPROP_MAX_COMMENT	32
209 
210 #define	ZPROP_CONT		-2
211 #define	ZPROP_INVAL		-1
212 
213 #define	ZPROP_VALUE		"value"
214 #define	ZPROP_SOURCE		"source"
215 
216 typedef enum {
217 	ZPROP_SRC_NONE = 0x1,
218 	ZPROP_SRC_DEFAULT = 0x2,
219 	ZPROP_SRC_TEMPORARY = 0x4,
220 	ZPROP_SRC_LOCAL = 0x8,
221 	ZPROP_SRC_INHERITED = 0x10,
222 	ZPROP_SRC_RECEIVED = 0x20
223 } zprop_source_t;
224 
225 #define	ZPROP_SRC_ALL	0x3f
226 
227 #define	ZPROP_SOURCE_VAL_RECVD	"$recvd"
228 #define	ZPROP_N_MORE_ERRORS	"N_MORE_ERRORS"
229 /*
230  * Dataset flag implemented as a special entry in the props zap object
231  * indicating that the dataset has received properties on or after
232  * SPA_VERSION_RECVD_PROPS. The first such receive blows away local properties
233  * just as it did in earlier versions, and thereafter, local properties are
234  * preserved.
235  */
236 #define	ZPROP_HAS_RECVD		"$hasrecvd"
237 
238 typedef enum {
239 	ZPROP_ERR_NOCLEAR = 0x1, /* failure to clear existing props */
240 	ZPROP_ERR_NORESTORE = 0x2 /* failure to restore props on error */
241 } zprop_errflags_t;
242 
243 typedef int (*zprop_func)(int, void *);
244 
245 /*
246  * Properties to be set on the root file system of a new pool
247  * are stuffed into their own nvlist, which is then included in
248  * the properties nvlist with the pool properties.
249  */
250 #define	ZPOOL_ROOTFS_PROPS	"root-props-nvl"
251 
252 /*
253  * Dataset property functions shared between libzfs and kernel.
254  */
255 const char *zfs_prop_default_string(zfs_prop_t);
256 uint64_t zfs_prop_default_numeric(zfs_prop_t);
257 boolean_t zfs_prop_readonly(zfs_prop_t);
258 boolean_t zfs_prop_inheritable(zfs_prop_t);
259 boolean_t zfs_prop_setonce(zfs_prop_t);
260 const char *zfs_prop_to_name(zfs_prop_t);
261 zfs_prop_t zfs_name_to_prop(const char *);
262 boolean_t zfs_prop_user(const char *);
263 boolean_t zfs_prop_userquota(const char *);
264 boolean_t zfs_prop_written(const char *);
265 int zfs_prop_index_to_string(zfs_prop_t, uint64_t, const char **);
266 int zfs_prop_string_to_index(zfs_prop_t, const char *, uint64_t *);
267 uint64_t zfs_prop_random_value(zfs_prop_t, uint64_t seed);
268 boolean_t zfs_prop_valid_for_type(int, zfs_type_t);
269 
270 /*
271  * Pool property functions shared between libzfs and kernel.
272  */
273 zpool_prop_t zpool_name_to_prop(const char *);
274 const char *zpool_prop_to_name(zpool_prop_t);
275 const char *zpool_prop_default_string(zpool_prop_t);
276 uint64_t zpool_prop_default_numeric(zpool_prop_t);
277 boolean_t zpool_prop_readonly(zpool_prop_t);
278 boolean_t zpool_prop_feature(const char *);
279 boolean_t zpool_prop_unsupported(const char *name);
280 int zpool_prop_index_to_string(zpool_prop_t, uint64_t, const char **);
281 int zpool_prop_string_to_index(zpool_prop_t, const char *, uint64_t *);
282 uint64_t zpool_prop_random_value(zpool_prop_t, uint64_t seed);
283 
284 /*
285  * Definitions for the Delegation.
286  */
287 typedef enum {
288 	ZFS_DELEG_WHO_UNKNOWN = 0,
289 	ZFS_DELEG_USER = 'u',
290 	ZFS_DELEG_USER_SETS = 'U',
291 	ZFS_DELEG_GROUP = 'g',
292 	ZFS_DELEG_GROUP_SETS = 'G',
293 	ZFS_DELEG_EVERYONE = 'e',
294 	ZFS_DELEG_EVERYONE_SETS = 'E',
295 	ZFS_DELEG_CREATE = 'c',
296 	ZFS_DELEG_CREATE_SETS = 'C',
297 	ZFS_DELEG_NAMED_SET = 's',
298 	ZFS_DELEG_NAMED_SET_SETS = 'S'
299 } zfs_deleg_who_type_t;
300 
301 typedef enum {
302 	ZFS_DELEG_NONE = 0,
303 	ZFS_DELEG_PERM_LOCAL = 1,
304 	ZFS_DELEG_PERM_DESCENDENT = 2,
305 	ZFS_DELEG_PERM_LOCALDESCENDENT = 3,
306 	ZFS_DELEG_PERM_CREATE = 4
307 } zfs_deleg_inherit_t;
308 
309 #define	ZFS_DELEG_PERM_UID	"uid"
310 #define	ZFS_DELEG_PERM_GID	"gid"
311 #define	ZFS_DELEG_PERM_GROUPS	"groups"
312 
313 #define	ZFS_MLSLABEL_DEFAULT	"none"
314 
315 #define	ZFS_SMB_ACL_SRC		"src"
316 #define	ZFS_SMB_ACL_TARGET	"target"
317 
318 typedef enum {
319 	ZFS_CANMOUNT_OFF = 0,
320 	ZFS_CANMOUNT_ON = 1,
321 	ZFS_CANMOUNT_NOAUTO = 2
322 } zfs_canmount_type_t;
323 
324 typedef enum {
325 	ZFS_LOGBIAS_LATENCY = 0,
326 	ZFS_LOGBIAS_THROUGHPUT = 1
327 } zfs_logbias_op_t;
328 
329 typedef enum zfs_share_op {
330 	ZFS_SHARE_NFS = 0,
331 	ZFS_UNSHARE_NFS = 1,
332 	ZFS_SHARE_SMB = 2,
333 	ZFS_UNSHARE_SMB = 3
334 } zfs_share_op_t;
335 
336 typedef enum zfs_smb_acl_op {
337 	ZFS_SMB_ACL_ADD,
338 	ZFS_SMB_ACL_REMOVE,
339 	ZFS_SMB_ACL_RENAME,
340 	ZFS_SMB_ACL_PURGE
341 } zfs_smb_acl_op_t;
342 
343 typedef enum zfs_cache_type {
344 	ZFS_CACHE_NONE = 0,
345 	ZFS_CACHE_METADATA = 1,
346 	ZFS_CACHE_ALL = 2
347 } zfs_cache_type_t;
348 
349 typedef enum {
350 	ZFS_SYNC_STANDARD = 0,
351 	ZFS_SYNC_ALWAYS = 1,
352 	ZFS_SYNC_DISABLED = 2
353 } zfs_sync_type_t;
354 
355 typedef enum {
356 	ZFS_REDUNDANT_METADATA_ALL,
357 	ZFS_REDUNDANT_METADATA_MOST
358 } zfs_redundant_metadata_type_t;
359 
360 /*
361  * On-disk version number.
362  */
363 #define	SPA_VERSION_1			1ULL
364 #define	SPA_VERSION_2			2ULL
365 #define	SPA_VERSION_3			3ULL
366 #define	SPA_VERSION_4			4ULL
367 #define	SPA_VERSION_5			5ULL
368 #define	SPA_VERSION_6			6ULL
369 #define	SPA_VERSION_7			7ULL
370 #define	SPA_VERSION_8			8ULL
371 #define	SPA_VERSION_9			9ULL
372 #define	SPA_VERSION_10			10ULL
373 #define	SPA_VERSION_11			11ULL
374 #define	SPA_VERSION_12			12ULL
375 #define	SPA_VERSION_13			13ULL
376 #define	SPA_VERSION_14			14ULL
377 #define	SPA_VERSION_15			15ULL
378 #define	SPA_VERSION_16			16ULL
379 #define	SPA_VERSION_17			17ULL
380 #define	SPA_VERSION_18			18ULL
381 #define	SPA_VERSION_19			19ULL
382 #define	SPA_VERSION_20			20ULL
383 #define	SPA_VERSION_21			21ULL
384 #define	SPA_VERSION_22			22ULL
385 #define	SPA_VERSION_23			23ULL
386 #define	SPA_VERSION_24			24ULL
387 #define	SPA_VERSION_25			25ULL
388 #define	SPA_VERSION_26			26ULL
389 #define	SPA_VERSION_27			27ULL
390 #define	SPA_VERSION_28			28ULL
391 #define	SPA_VERSION_5000		5000ULL
392 
393 /*
394  * When bumping up SPA_VERSION, make sure GRUB ZFS understands the on-disk
395  * format change. Go to usr/src/grub/grub-0.97/stage2/{zfs-include/, fsys_zfs*},
396  * and do the appropriate changes.  Also bump the version number in
397  * usr/src/grub/capability.
398  */
399 #define	SPA_VERSION			SPA_VERSION_5000
400 #define	SPA_VERSION_STRING		"5000"
401 
402 /*
403  * Symbolic names for the changes that caused a SPA_VERSION switch.
404  * Used in the code when checking for presence or absence of a feature.
405  * Feel free to define multiple symbolic names for each version if there
406  * were multiple changes to on-disk structures during that version.
407  *
408  * NOTE: When checking the current SPA_VERSION in your code, be sure
409  *       to use spa_version() since it reports the version of the
410  *       last synced uberblock.  Checking the in-flight version can
411  *       be dangerous in some cases.
412  */
413 #define	SPA_VERSION_INITIAL		SPA_VERSION_1
414 #define	SPA_VERSION_DITTO_BLOCKS	SPA_VERSION_2
415 #define	SPA_VERSION_SPARES		SPA_VERSION_3
416 #define	SPA_VERSION_RAIDZ2		SPA_VERSION_3
417 #define	SPA_VERSION_BPOBJ_ACCOUNT	SPA_VERSION_3
418 #define	SPA_VERSION_RAIDZ_DEFLATE	SPA_VERSION_3
419 #define	SPA_VERSION_DNODE_BYTES		SPA_VERSION_3
420 #define	SPA_VERSION_ZPOOL_HISTORY	SPA_VERSION_4
421 #define	SPA_VERSION_GZIP_COMPRESSION	SPA_VERSION_5
422 #define	SPA_VERSION_BOOTFS		SPA_VERSION_6
423 #define	SPA_VERSION_SLOGS		SPA_VERSION_7
424 #define	SPA_VERSION_DELEGATED_PERMS	SPA_VERSION_8
425 #define	SPA_VERSION_FUID		SPA_VERSION_9
426 #define	SPA_VERSION_REFRESERVATION	SPA_VERSION_9
427 #define	SPA_VERSION_REFQUOTA		SPA_VERSION_9
428 #define	SPA_VERSION_UNIQUE_ACCURATE	SPA_VERSION_9
429 #define	SPA_VERSION_L2CACHE		SPA_VERSION_10
430 #define	SPA_VERSION_NEXT_CLONES		SPA_VERSION_11
431 #define	SPA_VERSION_ORIGIN		SPA_VERSION_11
432 #define	SPA_VERSION_DSL_SCRUB		SPA_VERSION_11
433 #define	SPA_VERSION_SNAP_PROPS		SPA_VERSION_12
434 #define	SPA_VERSION_USED_BREAKDOWN	SPA_VERSION_13
435 #define	SPA_VERSION_PASSTHROUGH_X	SPA_VERSION_14
436 #define	SPA_VERSION_USERSPACE		SPA_VERSION_15
437 #define	SPA_VERSION_STMF_PROP		SPA_VERSION_16
438 #define	SPA_VERSION_RAIDZ3		SPA_VERSION_17
439 #define	SPA_VERSION_USERREFS		SPA_VERSION_18
440 #define	SPA_VERSION_HOLES		SPA_VERSION_19
441 #define	SPA_VERSION_ZLE_COMPRESSION	SPA_VERSION_20
442 #define	SPA_VERSION_DEDUP		SPA_VERSION_21
443 #define	SPA_VERSION_RECVD_PROPS		SPA_VERSION_22
444 #define	SPA_VERSION_SLIM_ZIL		SPA_VERSION_23
445 #define	SPA_VERSION_SA			SPA_VERSION_24
446 #define	SPA_VERSION_SCAN		SPA_VERSION_25
447 #define	SPA_VERSION_DIR_CLONES		SPA_VERSION_26
448 #define	SPA_VERSION_DEADLISTS		SPA_VERSION_26
449 #define	SPA_VERSION_FAST_SNAP		SPA_VERSION_27
450 #define	SPA_VERSION_MULTI_REPLACE	SPA_VERSION_28
451 #define	SPA_VERSION_BEFORE_FEATURES	SPA_VERSION_28
452 #define	SPA_VERSION_FEATURES		SPA_VERSION_5000
453 
454 #define	SPA_VERSION_IS_SUPPORTED(v) \
455 	(((v) >= SPA_VERSION_INITIAL && (v) <= SPA_VERSION_BEFORE_FEATURES) || \
456 	((v) >= SPA_VERSION_FEATURES && (v) <= SPA_VERSION))
457 
458 /*
459  * ZPL version - rev'd whenever an incompatible on-disk format change
460  * occurs.  This is independent of SPA/DMU/ZAP versioning.  You must
461  * also update the version_table[] and help message in zfs_prop.c.
462  *
463  * When changing, be sure to teach GRUB how to read the new format!
464  * See usr/src/grub/grub-0.97/stage2/{zfs-include/,fsys_zfs*}
465  */
466 #define	ZPL_VERSION_1			1ULL
467 #define	ZPL_VERSION_2			2ULL
468 #define	ZPL_VERSION_3			3ULL
469 #define	ZPL_VERSION_4			4ULL
470 #define	ZPL_VERSION_5			5ULL
471 #define	ZPL_VERSION			ZPL_VERSION_5
472 #define	ZPL_VERSION_STRING		"5"
473 
474 #define	ZPL_VERSION_INITIAL		ZPL_VERSION_1
475 #define	ZPL_VERSION_DIRENT_TYPE		ZPL_VERSION_2
476 #define	ZPL_VERSION_FUID		ZPL_VERSION_3
477 #define	ZPL_VERSION_NORMALIZATION	ZPL_VERSION_3
478 #define	ZPL_VERSION_SYSATTR		ZPL_VERSION_3
479 #define	ZPL_VERSION_USERSPACE		ZPL_VERSION_4
480 #define	ZPL_VERSION_SA			ZPL_VERSION_5
481 
482 /* Rewind request information */
483 #define	ZPOOL_NO_REWIND		1  /* No policy - default behavior */
484 #define	ZPOOL_NEVER_REWIND	2  /* Do not search for best txg or rewind */
485 #define	ZPOOL_TRY_REWIND	4  /* Search for best txg, but do not rewind */
486 #define	ZPOOL_DO_REWIND		8  /* Rewind to best txg w/in deferred frees */
487 #define	ZPOOL_EXTREME_REWIND	16 /* Allow extreme measures to find best txg */
488 #define	ZPOOL_REWIND_MASK	28 /* All the possible rewind bits */
489 #define	ZPOOL_REWIND_POLICIES	31 /* All the possible policy bits */
490 
491 typedef struct zpool_rewind_policy {
492 	uint32_t	zrp_request;	/* rewind behavior requested */
493 	uint64_t	zrp_maxmeta;	/* max acceptable meta-data errors */
494 	uint64_t	zrp_maxdata;	/* max acceptable data errors */
495 	uint64_t	zrp_txg;	/* specific txg to load */
496 } zpool_rewind_policy_t;
497 
498 /*
499  * The following are configuration names used in the nvlist describing a pool's
500  * configuration.
501  */
502 #define	ZPOOL_CONFIG_VERSION		"version"
503 #define	ZPOOL_CONFIG_POOL_NAME		"name"
504 #define	ZPOOL_CONFIG_POOL_STATE		"state"
505 #define	ZPOOL_CONFIG_POOL_TXG		"txg"
506 #define	ZPOOL_CONFIG_POOL_GUID		"pool_guid"
507 #define	ZPOOL_CONFIG_CREATE_TXG		"create_txg"
508 #define	ZPOOL_CONFIG_TOP_GUID		"top_guid"
509 #define	ZPOOL_CONFIG_VDEV_TREE		"vdev_tree"
510 #define	ZPOOL_CONFIG_TYPE		"type"
511 #define	ZPOOL_CONFIG_CHILDREN		"children"
512 #define	ZPOOL_CONFIG_ID			"id"
513 #define	ZPOOL_CONFIG_GUID		"guid"
514 #define	ZPOOL_CONFIG_PATH		"path"
515 #define	ZPOOL_CONFIG_DEVID		"devid"
516 #define	ZPOOL_CONFIG_METASLAB_ARRAY	"metaslab_array"
517 #define	ZPOOL_CONFIG_METASLAB_SHIFT	"metaslab_shift"
518 #define	ZPOOL_CONFIG_ASHIFT		"ashift"
519 #define	ZPOOL_CONFIG_ASIZE		"asize"
520 #define	ZPOOL_CONFIG_DTL		"DTL"
521 #define	ZPOOL_CONFIG_SCAN_STATS		"scan_stats"	/* not stored on disk */
522 #define	ZPOOL_CONFIG_VDEV_STATS		"vdev_stats"	/* not stored on disk */
523 #define	ZPOOL_CONFIG_WHOLE_DISK		"whole_disk"
524 #define	ZPOOL_CONFIG_ERRCOUNT		"error_count"
525 #define	ZPOOL_CONFIG_NOT_PRESENT	"not_present"
526 #define	ZPOOL_CONFIG_SPARES		"spares"
527 #define	ZPOOL_CONFIG_IS_SPARE		"is_spare"
528 #define	ZPOOL_CONFIG_NPARITY		"nparity"
529 #define	ZPOOL_CONFIG_HOSTID		"hostid"
530 #define	ZPOOL_CONFIG_HOSTNAME		"hostname"
531 #define	ZPOOL_CONFIG_LOADED_TIME	"initial_load_time"
532 #define	ZPOOL_CONFIG_UNSPARE		"unspare"
533 #define	ZPOOL_CONFIG_PHYS_PATH		"phys_path"
534 #define	ZPOOL_CONFIG_IS_LOG		"is_log"
535 #define	ZPOOL_CONFIG_L2CACHE		"l2cache"
536 #define	ZPOOL_CONFIG_HOLE_ARRAY		"hole_array"
537 #define	ZPOOL_CONFIG_VDEV_CHILDREN	"vdev_children"
538 #define	ZPOOL_CONFIG_IS_HOLE		"is_hole"
539 #define	ZPOOL_CONFIG_DDT_HISTOGRAM	"ddt_histogram"
540 #define	ZPOOL_CONFIG_DDT_OBJ_STATS	"ddt_object_stats"
541 #define	ZPOOL_CONFIG_DDT_STATS		"ddt_stats"
542 #define	ZPOOL_CONFIG_SPLIT		"splitcfg"
543 #define	ZPOOL_CONFIG_ORIG_GUID		"orig_guid"
544 #define	ZPOOL_CONFIG_SPLIT_GUID		"split_guid"
545 #define	ZPOOL_CONFIG_SPLIT_LIST		"guid_list"
546 #define	ZPOOL_CONFIG_REMOVING		"removing"
547 #define	ZPOOL_CONFIG_RESILVER_TXG	"resilver_txg"
548 #define	ZPOOL_CONFIG_COMMENT		"comment"
549 #define	ZPOOL_CONFIG_SUSPENDED		"suspended"	/* not stored on disk */
550 #define	ZPOOL_CONFIG_TIMESTAMP		"timestamp"	/* not stored on disk */
551 #define	ZPOOL_CONFIG_BOOTFS		"bootfs"	/* not stored on disk */
552 #define	ZPOOL_CONFIG_MISSING_DEVICES	"missing_vdevs"	/* not stored on disk */
553 #define	ZPOOL_CONFIG_LOAD_INFO		"load_info"	/* not stored on disk */
554 #define	ZPOOL_CONFIG_REWIND_INFO	"rewind_info"	/* not stored on disk */
555 #define	ZPOOL_CONFIG_UNSUP_FEAT		"unsup_feat"	/* not stored on disk */
556 #define	ZPOOL_CONFIG_ENABLED_FEAT	"enabled_feat"	/* not stored on disk */
557 #define	ZPOOL_CONFIG_CAN_RDONLY		"can_rdonly"	/* not stored on disk */
558 #define	ZPOOL_CONFIG_FEATURES_FOR_READ	"features_for_read"
559 #define	ZPOOL_CONFIG_FEATURE_STATS	"feature_stats"	/* not stored on disk */
560 /*
561  * The persistent vdev state is stored as separate values rather than a single
562  * 'vdev_state' entry.  This is because a device can be in multiple states, such
563  * as offline and degraded.
564  */
565 #define	ZPOOL_CONFIG_OFFLINE		"offline"
566 #define	ZPOOL_CONFIG_FAULTED		"faulted"
567 #define	ZPOOL_CONFIG_DEGRADED		"degraded"
568 #define	ZPOOL_CONFIG_REMOVED		"removed"
569 #define	ZPOOL_CONFIG_FRU		"fru"
570 #define	ZPOOL_CONFIG_AUX_STATE		"aux_state"
571 
572 /* Rewind policy parameters */
573 #define	ZPOOL_REWIND_POLICY		"rewind-policy"
574 #define	ZPOOL_REWIND_REQUEST		"rewind-request"
575 #define	ZPOOL_REWIND_REQUEST_TXG	"rewind-request-txg"
576 #define	ZPOOL_REWIND_META_THRESH	"rewind-meta-thresh"
577 #define	ZPOOL_REWIND_DATA_THRESH	"rewind-data-thresh"
578 
579 /* Rewind data discovered */
580 #define	ZPOOL_CONFIG_LOAD_TIME		"rewind_txg_ts"
581 #define	ZPOOL_CONFIG_LOAD_DATA_ERRORS	"verify_data_errors"
582 #define	ZPOOL_CONFIG_REWIND_TIME	"seconds_of_rewind"
583 
584 #define	VDEV_TYPE_ROOT			"root"
585 #define	VDEV_TYPE_MIRROR		"mirror"
586 #define	VDEV_TYPE_REPLACING		"replacing"
587 #define	VDEV_TYPE_RAIDZ			"raidz"
588 #define	VDEV_TYPE_DISK			"disk"
589 #define	VDEV_TYPE_FILE			"file"
590 #define	VDEV_TYPE_MISSING		"missing"
591 #define	VDEV_TYPE_HOLE			"hole"
592 #define	VDEV_TYPE_SPARE			"spare"
593 #define	VDEV_TYPE_LOG			"log"
594 #define	VDEV_TYPE_L2CACHE		"l2cache"
595 
596 /*
597  * This is needed in userland to report the minimum necessary device size.
598  */
599 #define	SPA_MINDEVSIZE		(64ULL << 20)
600 
601 /*
602  * Set if the fragmentation has not yet been calculated. This can happen
603  * because the space maps have not been upgraded or the histogram feature
604  * is not enabled.
605  */
606 #define	ZFS_FRAG_INVALID	UINT64_MAX
607 
608 /*
609  * The location of the pool configuration repository, shared between kernel and
610  * userland.
611  */
612 #define	ZPOOL_CACHE		"/etc/zfs/zpool.cache"
613 
614 /*
615  * vdev states are ordered from least to most healthy.
616  * A vdev that's CANT_OPEN or below is considered unusable.
617  */
618 typedef enum vdev_state {
619 	VDEV_STATE_UNKNOWN = 0,	/* Uninitialized vdev			*/
620 	VDEV_STATE_CLOSED,	/* Not currently open			*/
621 	VDEV_STATE_OFFLINE,	/* Not allowed to open			*/
622 	VDEV_STATE_REMOVED,	/* Explicitly removed from system	*/
623 	VDEV_STATE_CANT_OPEN,	/* Tried to open, but failed		*/
624 	VDEV_STATE_FAULTED,	/* External request to fault device	*/
625 	VDEV_STATE_DEGRADED,	/* Replicated vdev with unhealthy kids	*/
626 	VDEV_STATE_HEALTHY	/* Presumed good			*/
627 } vdev_state_t;
628 
629 #define	VDEV_STATE_ONLINE	VDEV_STATE_HEALTHY
630 
631 /*
632  * vdev aux states.  When a vdev is in the CANT_OPEN state, the aux field
633  * of the vdev stats structure uses these constants to distinguish why.
634  */
635 typedef enum vdev_aux {
636 	VDEV_AUX_NONE,		/* no error				*/
637 	VDEV_AUX_OPEN_FAILED,	/* ldi_open_*() or vn_open() failed	*/
638 	VDEV_AUX_CORRUPT_DATA,	/* bad label or disk contents		*/
639 	VDEV_AUX_NO_REPLICAS,	/* insufficient number of replicas	*/
640 	VDEV_AUX_BAD_GUID_SUM,	/* vdev guid sum doesn't match		*/
641 	VDEV_AUX_TOO_SMALL,	/* vdev size is too small		*/
642 	VDEV_AUX_BAD_LABEL,	/* the label is OK but invalid		*/
643 	VDEV_AUX_VERSION_NEWER,	/* on-disk version is too new		*/
644 	VDEV_AUX_VERSION_OLDER,	/* on-disk version is too old		*/
645 	VDEV_AUX_UNSUP_FEAT,	/* unsupported features			*/
646 	VDEV_AUX_SPARED,	/* hot spare used in another pool	*/
647 	VDEV_AUX_ERR_EXCEEDED,	/* too many errors			*/
648 	VDEV_AUX_IO_FAILURE,	/* experienced I/O failure		*/
649 	VDEV_AUX_BAD_LOG,	/* cannot read log chain(s)		*/
650 	VDEV_AUX_EXTERNAL,	/* external diagnosis			*/
651 	VDEV_AUX_SPLIT_POOL	/* vdev was split off into another pool	*/
652 } vdev_aux_t;
653 
654 /*
655  * pool state.  The following states are written to disk as part of the normal
656  * SPA lifecycle: ACTIVE, EXPORTED, DESTROYED, SPARE, L2CACHE.  The remaining
657  * states are software abstractions used at various levels to communicate
658  * pool state.
659  */
660 typedef enum pool_state {
661 	POOL_STATE_ACTIVE = 0,		/* In active use		*/
662 	POOL_STATE_EXPORTED,		/* Explicitly exported		*/
663 	POOL_STATE_DESTROYED,		/* Explicitly destroyed		*/
664 	POOL_STATE_SPARE,		/* Reserved for hot spare use	*/
665 	POOL_STATE_L2CACHE,		/* Level 2 ARC device		*/
666 	POOL_STATE_UNINITIALIZED,	/* Internal spa_t state		*/
667 	POOL_STATE_UNAVAIL,		/* Internal libzfs state	*/
668 	POOL_STATE_POTENTIALLY_ACTIVE	/* Internal libzfs state	*/
669 } pool_state_t;
670 
671 /*
672  * Scan Functions.
673  */
674 typedef enum pool_scan_func {
675 	POOL_SCAN_NONE,
676 	POOL_SCAN_SCRUB,
677 	POOL_SCAN_RESILVER,
678 	POOL_SCAN_FUNCS
679 } pool_scan_func_t;
680 
681 /*
682  * ZIO types.  Needed to interpret vdev statistics below.
683  */
684 typedef enum zio_type {
685 	ZIO_TYPE_NULL = 0,
686 	ZIO_TYPE_READ,
687 	ZIO_TYPE_WRITE,
688 	ZIO_TYPE_FREE,
689 	ZIO_TYPE_CLAIM,
690 	ZIO_TYPE_IOCTL,
691 	ZIO_TYPES
692 } zio_type_t;
693 
694 /*
695  * Pool statistics.  Note: all fields should be 64-bit because this
696  * is passed between kernel and userland as an nvlist uint64 array.
697  */
698 typedef struct pool_scan_stat {
699 	/* values stored on disk */
700 	uint64_t	pss_func;	/* pool_scan_func_t */
701 	uint64_t	pss_state;	/* dsl_scan_state_t */
702 	uint64_t	pss_start_time;	/* scan start time */
703 	uint64_t	pss_end_time;	/* scan end time */
704 	uint64_t	pss_to_examine;	/* total bytes to scan */
705 	uint64_t	pss_examined;	/* total examined bytes	*/
706 	uint64_t	pss_to_process; /* total bytes to process */
707 	uint64_t	pss_processed;	/* total processed bytes */
708 	uint64_t	pss_errors;	/* scan errors	*/
709 
710 	/* values not stored on disk */
711 	uint64_t	pss_pass_exam;	/* examined bytes per scan pass */
712 	uint64_t	pss_pass_start;	/* start time of a scan pass */
713 } pool_scan_stat_t;
714 
715 typedef enum dsl_scan_state {
716 	DSS_NONE,
717 	DSS_SCANNING,
718 	DSS_FINISHED,
719 	DSS_CANCELED,
720 	DSS_NUM_STATES
721 } dsl_scan_state_t;
722 
723 
724 /*
725  * Vdev statistics.  Note: all fields should be 64-bit because this
726  * is passed between kernel and userland as an nvlist uint64 array.
727  */
728 typedef struct vdev_stat {
729 	hrtime_t	vs_timestamp;		/* time since vdev load	*/
730 	uint64_t	vs_state;		/* vdev state		*/
731 	uint64_t	vs_aux;			/* see vdev_aux_t	*/
732 	uint64_t	vs_alloc;		/* space allocated	*/
733 	uint64_t	vs_space;		/* total capacity	*/
734 	uint64_t	vs_dspace;		/* deflated capacity	*/
735 	uint64_t	vs_rsize;		/* replaceable dev size */
736 	uint64_t	vs_esize;		/* expandable dev size */
737 	uint64_t	vs_ops[ZIO_TYPES];	/* operation count	*/
738 	uint64_t	vs_bytes[ZIO_TYPES];	/* bytes read/written	*/
739 	uint64_t	vs_read_errors;		/* read errors		*/
740 	uint64_t	vs_write_errors;	/* write errors		*/
741 	uint64_t	vs_checksum_errors;	/* checksum errors	*/
742 	uint64_t	vs_self_healed;		/* self-healed bytes	*/
743 	uint64_t	vs_scan_removing;	/* removing?	*/
744 	uint64_t	vs_scan_processed;	/* scan processed bytes	*/
745 	uint64_t	vs_fragmentation;	/* device fragmentation */
746 } vdev_stat_t;
747 
748 /*
749  * DDT statistics.  Note: all fields should be 64-bit because this
750  * is passed between kernel and userland as an nvlist uint64 array.
751  */
752 typedef struct ddt_object {
753 	uint64_t	ddo_count;	/* number of elments in ddt 	*/
754 	uint64_t	ddo_dspace;	/* size of ddt on disk		*/
755 	uint64_t	ddo_mspace;	/* size of ddt in-core		*/
756 } ddt_object_t;
757 
758 typedef struct ddt_stat {
759 	uint64_t	dds_blocks;	/* blocks			*/
760 	uint64_t	dds_lsize;	/* logical size			*/
761 	uint64_t	dds_psize;	/* physical size		*/
762 	uint64_t	dds_dsize;	/* deflated allocated size	*/
763 	uint64_t	dds_ref_blocks;	/* referenced blocks		*/
764 	uint64_t	dds_ref_lsize;	/* referenced lsize * refcnt	*/
765 	uint64_t	dds_ref_psize;	/* referenced psize * refcnt	*/
766 	uint64_t	dds_ref_dsize;	/* referenced dsize * refcnt	*/
767 } ddt_stat_t;
768 
769 typedef struct ddt_histogram {
770 	ddt_stat_t	ddh_stat[64];	/* power-of-two histogram buckets */
771 } ddt_histogram_t;
772 
773 #define	ZVOL_DRIVER	"zvol"
774 #define	ZFS_DRIVER	"zfs"
775 #define	ZFS_DEV		"/dev/zfs"
776 
777 /* general zvol path */
778 #define	ZVOL_DIR		"/dev/zvol"
779 /* expansion */
780 #define	ZVOL_PSEUDO_DEV		"/devices/pseudo/zfs@0:"
781 /* for dump and swap */
782 #define	ZVOL_FULL_DEV_DIR	ZVOL_DIR "/dsk/"
783 #define	ZVOL_FULL_RDEV_DIR	ZVOL_DIR "/rdsk/"
784 
785 #define	ZVOL_PROP_NAME		"name"
786 #define	ZVOL_DEFAULT_BLOCKSIZE	8192
787 
788 /*
789  * /dev/zfs ioctl numbers.
790  */
791 typedef enum zfs_ioc {
792 	ZFS_IOC_FIRST =	('Z' << 8),
793 	ZFS_IOC = ZFS_IOC_FIRST,
794 	ZFS_IOC_POOL_CREATE = ZFS_IOC_FIRST,
795 	ZFS_IOC_POOL_DESTROY,
796 	ZFS_IOC_POOL_IMPORT,
797 	ZFS_IOC_POOL_EXPORT,
798 	ZFS_IOC_POOL_CONFIGS,
799 	ZFS_IOC_POOL_STATS,
800 	ZFS_IOC_POOL_TRYIMPORT,
801 	ZFS_IOC_POOL_SCAN,
802 	ZFS_IOC_POOL_FREEZE,
803 	ZFS_IOC_POOL_UPGRADE,
804 	ZFS_IOC_POOL_GET_HISTORY,
805 	ZFS_IOC_VDEV_ADD,
806 	ZFS_IOC_VDEV_REMOVE,
807 	ZFS_IOC_VDEV_SET_STATE,
808 	ZFS_IOC_VDEV_ATTACH,
809 	ZFS_IOC_VDEV_DETACH,
810 	ZFS_IOC_VDEV_SETPATH,
811 	ZFS_IOC_VDEV_SETFRU,
812 	ZFS_IOC_OBJSET_STATS,
813 	ZFS_IOC_OBJSET_ZPLPROPS,
814 	ZFS_IOC_DATASET_LIST_NEXT,
815 	ZFS_IOC_SNAPSHOT_LIST_NEXT,
816 	ZFS_IOC_SET_PROP,
817 	ZFS_IOC_CREATE,
818 	ZFS_IOC_DESTROY,
819 	ZFS_IOC_ROLLBACK,
820 	ZFS_IOC_RENAME,
821 	ZFS_IOC_RECV,
822 	ZFS_IOC_SEND,
823 	ZFS_IOC_INJECT_FAULT,
824 	ZFS_IOC_CLEAR_FAULT,
825 	ZFS_IOC_INJECT_LIST_NEXT,
826 	ZFS_IOC_ERROR_LOG,
827 	ZFS_IOC_CLEAR,
828 	ZFS_IOC_PROMOTE,
829 	ZFS_IOC_SNAPSHOT,
830 	ZFS_IOC_DSOBJ_TO_DSNAME,
831 	ZFS_IOC_OBJ_TO_PATH,
832 	ZFS_IOC_POOL_SET_PROPS,
833 	ZFS_IOC_POOL_GET_PROPS,
834 	ZFS_IOC_SET_FSACL,
835 	ZFS_IOC_GET_FSACL,
836 	ZFS_IOC_SHARE,
837 	ZFS_IOC_INHERIT_PROP,
838 	ZFS_IOC_SMB_ACL,
839 	ZFS_IOC_USERSPACE_ONE,
840 	ZFS_IOC_USERSPACE_MANY,
841 	ZFS_IOC_USERSPACE_UPGRADE,
842 	ZFS_IOC_HOLD,
843 	ZFS_IOC_RELEASE,
844 	ZFS_IOC_GET_HOLDS,
845 	ZFS_IOC_OBJSET_RECVD_PROPS,
846 	ZFS_IOC_VDEV_SPLIT,
847 	ZFS_IOC_NEXT_OBJ,
848 	ZFS_IOC_DIFF,
849 	ZFS_IOC_TMP_SNAPSHOT,
850 	ZFS_IOC_OBJ_TO_STATS,
851 	ZFS_IOC_SPACE_WRITTEN,
852 	ZFS_IOC_SPACE_SNAPS,
853 	ZFS_IOC_DESTROY_SNAPS,
854 	ZFS_IOC_POOL_REGUID,
855 	ZFS_IOC_POOL_REOPEN,
856 	ZFS_IOC_SEND_PROGRESS,
857 	ZFS_IOC_LOG_HISTORY,
858 	ZFS_IOC_SEND_NEW,
859 	ZFS_IOC_SEND_SPACE,
860 	ZFS_IOC_CLONE,
861 	ZFS_IOC_SET_ZEV_CALLBACKS,
862 	ZFS_IOC_UNSET_ZEV_CALLBACKS,
863 	ZFS_IOC_BOOKMARK,
864 	ZFS_IOC_GET_BOOKMARKS,
865 	ZFS_IOC_DESTROY_BOOKMARKS,
866 	ZFS_IOC_ARC_INFO,
867 	ZFS_IOC_LAST
868 } zfs_ioc_t;
869 
870 /*
871  * Internal SPA load state.  Used by FMA diagnosis engine.
872  */
873 typedef enum {
874 	SPA_LOAD_NONE,		/* no load in progress	*/
875 	SPA_LOAD_OPEN,		/* normal open		*/
876 	SPA_LOAD_IMPORT,	/* import in progress	*/
877 	SPA_LOAD_TRYIMPORT,	/* tryimport in progress */
878 	SPA_LOAD_RECOVER,	/* recovery requested	*/
879 	SPA_LOAD_ERROR		/* load failed		*/
880 } spa_load_state_t;
881 
882 /*
883  * Bookmark name values.
884  */
885 #define	ZPOOL_ERR_LIST		"error list"
886 #define	ZPOOL_ERR_DATASET	"dataset"
887 #define	ZPOOL_ERR_OBJECT	"object"
888 
889 #define	HIS_MAX_RECORD_LEN	(MAXPATHLEN + MAXPATHLEN + 1)
890 
891 /*
892  * The following are names used in the nvlist describing
893  * the pool's history log.
894  */
895 #define	ZPOOL_HIST_RECORD	"history record"
896 #define	ZPOOL_HIST_TIME		"history time"
897 #define	ZPOOL_HIST_CMD		"history command"
898 #define	ZPOOL_HIST_WHO		"history who"
899 #define	ZPOOL_HIST_ZONE		"history zone"
900 #define	ZPOOL_HIST_HOST		"history hostname"
901 #define	ZPOOL_HIST_TXG		"history txg"
902 #define	ZPOOL_HIST_INT_EVENT	"history internal event"
903 #define	ZPOOL_HIST_INT_STR	"history internal str"
904 #define	ZPOOL_HIST_INT_NAME	"internal_name"
905 #define	ZPOOL_HIST_IOCTL	"ioctl"
906 #define	ZPOOL_HIST_INPUT_NVL	"in_nvl"
907 #define	ZPOOL_HIST_OUTPUT_NVL	"out_nvl"
908 #define	ZPOOL_HIST_DSNAME	"dsname"
909 #define	ZPOOL_HIST_DSID		"dsid"
910 
911 /*
912  * Flags for ZFS_IOC_VDEV_SET_STATE
913  */
914 #define	ZFS_ONLINE_CHECKREMOVE	0x1
915 #define	ZFS_ONLINE_UNSPARE	0x2
916 #define	ZFS_ONLINE_FORCEFAULT	0x4
917 #define	ZFS_ONLINE_EXPAND	0x8
918 #define	ZFS_OFFLINE_TEMPORARY	0x1
919 
920 /*
921  * Flags for ZFS_IOC_POOL_IMPORT
922  */
923 #define	ZFS_IMPORT_NORMAL	0x0
924 #define	ZFS_IMPORT_VERBATIM	0x1
925 #define	ZFS_IMPORT_ANY_HOST	0x2
926 #define	ZFS_IMPORT_MISSING_LOG	0x4
927 #define	ZFS_IMPORT_ONLY		0x8
928 
929 /*
930  * Sysevent payload members.  ZFS will generate the following sysevents with the
931  * given payloads:
932  *
933  *	ESC_ZFS_RESILVER_START
934  *	ESC_ZFS_RESILVER_END
935  *	ESC_ZFS_POOL_DESTROY
936  *	ESC_ZFS_POOL_REGUID
937  *
938  *		ZFS_EV_POOL_NAME	DATA_TYPE_STRING
939  *		ZFS_EV_POOL_GUID	DATA_TYPE_UINT64
940  *
941  *	ESC_ZFS_VDEV_REMOVE
942  *	ESC_ZFS_VDEV_CLEAR
943  *	ESC_ZFS_VDEV_CHECK
944  *
945  *		ZFS_EV_POOL_NAME	DATA_TYPE_STRING
946  *		ZFS_EV_POOL_GUID	DATA_TYPE_UINT64
947  *		ZFS_EV_VDEV_PATH	DATA_TYPE_STRING	(optional)
948  *		ZFS_EV_VDEV_GUID	DATA_TYPE_UINT64
949  */
950 #define	ZFS_EV_POOL_NAME	"pool_name"
951 #define	ZFS_EV_POOL_GUID	"pool_guid"
952 #define	ZFS_EV_VDEV_PATH	"vdev_path"
953 #define	ZFS_EV_VDEV_GUID	"vdev_guid"
954 
955 #ifdef	__cplusplus
956 }
957 #endif
958 
959 #endif	/* _SYS_FS_ZFS_H */
960