include/sys/fs/zfs.h

   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, 2017 by Delphix. All rights reserved.
  25  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  26  * Copyright (c) 2013, 2017 Joyent, Inc. All rights reserved.
  27  * Copyright (c) 2014 Integros [integros.com]
  28  * Copyright (c) 2017 Datto Inc.
  29  */
  30
  31 /* Portions Copyright 2010 Robert Milkowski */
  32
  33 #ifndef _SYS_FS_ZFS_H
  34 #define _SYS_FS_ZFS_H
  35
  36 #include <sys/time.h>
  37 #include <sys/zio_priority.h>
  38
  39 #ifdef  __cplusplus
  40 extern "C" {
  41 #endif
  42
  43 /*
  44  * Types and constants shared between userland and the kernel.
  45  */
  46
  47 /*
  48  * Each dataset can be one of the following types.  These constants can be
  49  * combined into masks that can be passed to various functions.
  50  */
  51 typedef enum {
  52         ZFS_TYPE_FILESYSTEM     = (1 << 0),
  53         ZFS_TYPE_SNAPSHOT       = (1 << 1),
  54         ZFS_TYPE_VOLUME         = (1 << 2),
  55         ZFS_TYPE_POOL           = (1 << 3),
  56         ZFS_TYPE_BOOKMARK       = (1 << 4)
  57 } zfs_type_t;
  58
  59 /*
  60  * NB: lzc_dataset_type should be updated whenever a new objset type is added,
  61  * if it represents a real type of a dataset that can be created from userland.
  62  */
  63 typedef enum dmu_objset_type {
  64         DMU_OST_NONE,
  65         DMU_OST_META,
  66         DMU_OST_ZFS,
  67         DMU_OST_ZVOL,
  68         DMU_OST_OTHER,                  /* For testing only! */
  69         DMU_OST_ANY,                    /* Be careful! */
  70         DMU_OST_NUMTYPES
  71 } dmu_objset_type_t;
  72
  73 #define ZFS_TYPE_DATASET        \
  74         (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME | ZFS_TYPE_SNAPSHOT)
  75
  76 /*
  77  * All of these include the terminating NUL byte.
  78  */
  79 #define ZAP_MAXNAMELEN 256
  80 #define ZAP_MAXVALUELEN (1024 * 8)
  81 #define ZAP_OLDMAXVALUELEN 1024
  82 #define ZFS_MAX_DATASET_NAME_LEN 256
  83
  84 /*
  85  * Dataset properties are identified by these constants and must be added to
  86  * the end of this list to ensure that external consumers are not affected
  87  * by the change. If you make any changes to this list, be sure to update
  88  * the property table in module/zcommon/zfs_prop.c.
  89  */
  90 typedef enum {
  91         ZPROP_CONT = -2,
  92         ZPROP_INVAL = -1,
  93         ZFS_PROP_TYPE = 0,
  94         ZFS_PROP_CREATION,
  95         ZFS_PROP_USED,
  96         ZFS_PROP_AVAILABLE,
  97         ZFS_PROP_REFERENCED,
  98         ZFS_PROP_COMPRESSRATIO,
  99         ZFS_PROP_MOUNTED,
 100         ZFS_PROP_ORIGIN,
 101         ZFS_PROP_QUOTA,
 102         ZFS_PROP_RESERVATION,
 103         ZFS_PROP_VOLSIZE,
 104         ZFS_PROP_VOLBLOCKSIZE,
 105         ZFS_PROP_RECORDSIZE,
 106         ZFS_PROP_MOUNTPOINT,
 107         ZFS_PROP_SHARENFS,
 108         ZFS_PROP_CHECKSUM,
 109         ZFS_PROP_COMPRESSION,
 110         ZFS_PROP_ATIME,
 111         ZFS_PROP_DEVICES,
 112         ZFS_PROP_EXEC,
 113         ZFS_PROP_SETUID,
 114         ZFS_PROP_READONLY,
 115         ZFS_PROP_ZONED,
 116         ZFS_PROP_SNAPDIR,
 117         ZFS_PROP_PRIVATE,               /* not exposed to user, temporary */
 118         ZFS_PROP_ACLINHERIT,
 119         ZFS_PROP_CREATETXG,
 120         ZFS_PROP_NAME,                  /* not exposed to the user */
 121         ZFS_PROP_CANMOUNT,
 122         ZFS_PROP_ISCSIOPTIONS,          /* not exposed to the user */
 123         ZFS_PROP_XATTR,
 124         ZFS_PROP_NUMCLONES,             /* not exposed to the user */
 125         ZFS_PROP_COPIES,
 126         ZFS_PROP_VERSION,
 127         ZFS_PROP_UTF8ONLY,
 128         ZFS_PROP_NORMALIZE,
 129         ZFS_PROP_CASE,
 130         ZFS_PROP_VSCAN,
 131         ZFS_PROP_NBMAND,
 132         ZFS_PROP_SHARESMB,
 133         ZFS_PROP_REFQUOTA,
 134         ZFS_PROP_REFRESERVATION,
 135         ZFS_PROP_GUID,
 136         ZFS_PROP_PRIMARYCACHE,
 137         ZFS_PROP_SECONDARYCACHE,
 138         ZFS_PROP_USEDSNAP,
 139         ZFS_PROP_USEDDS,
 140         ZFS_PROP_USEDCHILD,
 141         ZFS_PROP_USEDREFRESERV,
 142         ZFS_PROP_USERACCOUNTING,        /* not exposed to the user */
 143         ZFS_PROP_STMF_SHAREINFO,        /* not exposed to the user */
 144         ZFS_PROP_DEFER_DESTROY,
 145         ZFS_PROP_USERREFS,
 146         ZFS_PROP_LOGBIAS,
 147         ZFS_PROP_UNIQUE,                /* not exposed to the user */
 148         ZFS_PROP_OBJSETID,
 149         ZFS_PROP_DEDUP,
 150         ZFS_PROP_MLSLABEL,
 151         ZFS_PROP_SYNC,
 152         ZFS_PROP_DNODESIZE,
 153         ZFS_PROP_REFRATIO,
 154         ZFS_PROP_WRITTEN,
 155         ZFS_PROP_CLONES,
 156         ZFS_PROP_LOGICALUSED,
 157         ZFS_PROP_LOGICALREFERENCED,
 158         ZFS_PROP_INCONSISTENT,          /* not exposed to the user */
 159         ZFS_PROP_VOLMODE,
 160         ZFS_PROP_FILESYSTEM_LIMIT,
 161         ZFS_PROP_SNAPSHOT_LIMIT,
 162         ZFS_PROP_FILESYSTEM_COUNT,
 163         ZFS_PROP_SNAPSHOT_COUNT,
 164         ZFS_PROP_SNAPDEV,
 165         ZFS_PROP_ACLTYPE,
 166         ZFS_PROP_SELINUX_CONTEXT,
 167         ZFS_PROP_SELINUX_FSCONTEXT,
 168         ZFS_PROP_SELINUX_DEFCONTEXT,
 169         ZFS_PROP_SELINUX_ROOTCONTEXT,
 170         ZFS_PROP_RELATIME,
 171         ZFS_PROP_REDUNDANT_METADATA,
 172         ZFS_PROP_OVERLAY,
 173         ZFS_PROP_PREV_SNAP,
 174         ZFS_PROP_RECEIVE_RESUME_TOKEN,
 175         ZFS_PROP_ENCRYPTION,
 176         ZFS_PROP_KEYLOCATION,
 177         ZFS_PROP_KEYFORMAT,
 178         ZFS_PROP_PBKDF2_SALT,
 179         ZFS_PROP_PBKDF2_ITERS,
 180         ZFS_PROP_ENCRYPTION_ROOT,
 181         ZFS_PROP_KEY_GUID,
 182         ZFS_PROP_KEYSTATUS,
 183         ZFS_PROP_REMAPTXG,              /* not exposed to the user */
 184         ZFS_NUM_PROPS
 185 } zfs_prop_t;
 186
 187 typedef enum {
 188         ZFS_PROP_USERUSED,
 189         ZFS_PROP_USERQUOTA,
 190         ZFS_PROP_GROUPUSED,
 191         ZFS_PROP_GROUPQUOTA,
 192         ZFS_PROP_USEROBJUSED,
 193         ZFS_PROP_USEROBJQUOTA,
 194         ZFS_PROP_GROUPOBJUSED,
 195         ZFS_PROP_GROUPOBJQUOTA,
 196         ZFS_PROP_PROJECTUSED,
 197         ZFS_PROP_PROJECTQUOTA,
 198         ZFS_PROP_PROJECTOBJUSED,
 199         ZFS_PROP_PROJECTOBJQUOTA,
 200         ZFS_NUM_USERQUOTA_PROPS
 201 } zfs_userquota_prop_t;
 202
 203 extern const char *zfs_userquota_prop_prefixes[ZFS_NUM_USERQUOTA_PROPS];
 204
 205 /*
 206  * Pool properties are identified by these constants and must be added to the
 207  * end of this list to ensure that external consumers are not affected
 208  * by the change. If you make any changes to this list, be sure to update
 209  * the property table in module/zcommon/zpool_prop.c.
 210  */
 211 typedef enum {
 212         ZPOOL_PROP_INVAL = -1,
 213         ZPOOL_PROP_NAME,
 214         ZPOOL_PROP_SIZE,
 215         ZPOOL_PROP_CAPACITY,
 216         ZPOOL_PROP_ALTROOT,
 217         ZPOOL_PROP_HEALTH,
 218         ZPOOL_PROP_GUID,
 219         ZPOOL_PROP_VERSION,
 220         ZPOOL_PROP_BOOTFS,
 221         ZPOOL_PROP_DELEGATION,
 222         ZPOOL_PROP_AUTOREPLACE,
 223         ZPOOL_PROP_CACHEFILE,
 224         ZPOOL_PROP_FAILUREMODE,
 225         ZPOOL_PROP_LISTSNAPS,
 226         ZPOOL_PROP_AUTOEXPAND,
 227         ZPOOL_PROP_DEDUPDITTO,
 228         ZPOOL_PROP_DEDUPRATIO,
 229         ZPOOL_PROP_FREE,
 230         ZPOOL_PROP_ALLOCATED,
 231         ZPOOL_PROP_READONLY,
 232         ZPOOL_PROP_ASHIFT,
 233         ZPOOL_PROP_COMMENT,
 234         ZPOOL_PROP_EXPANDSZ,
 235         ZPOOL_PROP_FREEING,
 236         ZPOOL_PROP_FRAGMENTATION,
 237         ZPOOL_PROP_LEAKED,
 238         ZPOOL_PROP_MAXBLOCKSIZE,
 239         ZPOOL_PROP_TNAME,
 240         ZPOOL_PROP_MAXDNODESIZE,
 241         ZPOOL_PROP_MULTIHOST,
 242         ZPOOL_PROP_CHECKPOINT,
 243         ZPOOL_PROP_LOAD_GUID,
 244         ZPOOL_NUM_PROPS
 245 } zpool_prop_t;
 246
 247 /* Small enough to not hog a whole line of printout in zpool(1M). */
 248 #define ZPROP_MAX_COMMENT       32
 249
 250 #define ZPROP_VALUE             "value"
 251 #define ZPROP_SOURCE            "source"
 252
 253 typedef enum {
 254         ZPROP_SRC_NONE = 0x1,
 255         ZPROP_SRC_DEFAULT = 0x2,
 256         ZPROP_SRC_TEMPORARY = 0x4,
 257         ZPROP_SRC_LOCAL = 0x8,
 258         ZPROP_SRC_INHERITED = 0x10,
 259         ZPROP_SRC_RECEIVED = 0x20
 260 } zprop_source_t;
 261
 262 #define ZPROP_SRC_ALL   0x3f
 263
 264 #define ZPROP_SOURCE_VAL_RECVD  "$recvd"
 265 #define ZPROP_N_MORE_ERRORS     "N_MORE_ERRORS"
 266
 267 /*
 268  * Dataset flag implemented as a special entry in the props zap object
 269  * indicating that the dataset has received properties on or after
 270  * SPA_VERSION_RECVD_PROPS. The first such receive blows away local properties
 271  * just as it did in earlier versions, and thereafter, local properties are
 272  * preserved.
 273  */
 274 #define ZPROP_HAS_RECVD         "$hasrecvd"
 275
 276 typedef enum {
 277         ZPROP_ERR_NOCLEAR = 0x1, /* failure to clear existing props */
 278         ZPROP_ERR_NORESTORE = 0x2 /* failure to restore props on error */
 279 } zprop_errflags_t;
 280
 281 typedef int (*zprop_func)(int, void *);
 282
 283 /*
 284  * Properties to be set on the root file system of a new pool
 285  * are stuffed into their own nvlist, which is then included in
 286  * the properties nvlist with the pool properties.
 287  */
 288 #define ZPOOL_ROOTFS_PROPS      "root-props-nvl"
 289
 290 /*
 291  * Length of 'written@' and 'written#'
 292  */
 293 #define ZFS_WRITTEN_PROP_PREFIX_LEN     8
 294
 295 /*
 296  * Dataset property functions shared between libzfs and kernel.
 297  */
 298 const char *zfs_prop_default_string(zfs_prop_t);
 299 uint64_t zfs_prop_default_numeric(zfs_prop_t);
 300 boolean_t zfs_prop_readonly(zfs_prop_t);
 301 boolean_t zfs_prop_visible(zfs_prop_t prop);
 302 boolean_t zfs_prop_inheritable(zfs_prop_t);
 303 boolean_t zfs_prop_setonce(zfs_prop_t);
 304 boolean_t zfs_prop_encryption_key_param(zfs_prop_t);
 305 boolean_t zfs_prop_valid_keylocation(const char *, boolean_t);
 306 const char *zfs_prop_to_name(zfs_prop_t);
 307 zfs_prop_t zfs_name_to_prop(const char *);
 308 boolean_t zfs_prop_user(const char *);
 309 boolean_t zfs_prop_userquota(const char *);
 310 boolean_t zfs_prop_written(const char *);
 311 int zfs_prop_index_to_string(zfs_prop_t, uint64_t, const char **);
 312 int zfs_prop_string_to_index(zfs_prop_t, const char *, uint64_t *);
 313 uint64_t zfs_prop_random_value(zfs_prop_t, uint64_t seed);
 314 boolean_t zfs_prop_valid_for_type(int, zfs_type_t, boolean_t);
 315
 316 /*
 317  * Pool property functions shared between libzfs and kernel.
 318  */
 319 zpool_prop_t zpool_name_to_prop(const char *);
 320 const char *zpool_prop_to_name(zpool_prop_t);
 321 const char *zpool_prop_default_string(zpool_prop_t);
 322 uint64_t zpool_prop_default_numeric(zpool_prop_t);
 323 boolean_t zpool_prop_readonly(zpool_prop_t);
 324 boolean_t zpool_prop_setonce(zpool_prop_t);
 325 boolean_t zpool_prop_feature(const char *);
 326 boolean_t zpool_prop_unsupported(const char *);
 327 int zpool_prop_index_to_string(zpool_prop_t, uint64_t, const char **);
 328 int zpool_prop_string_to_index(zpool_prop_t, const char *, uint64_t *);
 329 uint64_t zpool_prop_random_value(zpool_prop_t, uint64_t seed);
 330
 331 /*
 332  * Definitions for the Delegation.
 333  */
 334 typedef enum {
 335         ZFS_DELEG_WHO_UNKNOWN = 0,
 336         ZFS_DELEG_USER = 'u',
 337         ZFS_DELEG_USER_SETS = 'U',
 338         ZFS_DELEG_GROUP = 'g',
 339         ZFS_DELEG_GROUP_SETS = 'G',
 340         ZFS_DELEG_EVERYONE = 'e',
 341         ZFS_DELEG_EVERYONE_SETS = 'E',
 342         ZFS_DELEG_CREATE = 'c',
 343         ZFS_DELEG_CREATE_SETS = 'C',
 344         ZFS_DELEG_NAMED_SET = 's',
 345         ZFS_DELEG_NAMED_SET_SETS = 'S'
 346 } zfs_deleg_who_type_t;
 347
 348 typedef enum {
 349         ZFS_DELEG_NONE = 0,
 350         ZFS_DELEG_PERM_LOCAL = 1,
 351         ZFS_DELEG_PERM_DESCENDENT = 2,
 352         ZFS_DELEG_PERM_LOCALDESCENDENT = 3,
 353         ZFS_DELEG_PERM_CREATE = 4
 354 } zfs_deleg_inherit_t;
 355
 356 #define ZFS_DELEG_PERM_UID      "uid"
 357 #define ZFS_DELEG_PERM_GID      "gid"
 358 #define ZFS_DELEG_PERM_GROUPS   "groups"
 359
 360 #define ZFS_MLSLABEL_DEFAULT    "none"
 361
 362 #define ZFS_SMB_ACL_SRC         "src"
 363 #define ZFS_SMB_ACL_TARGET      "target"
 364
 365 typedef enum {
 366         ZFS_CANMOUNT_OFF = 0,
 367         ZFS_CANMOUNT_ON = 1,
 368         ZFS_CANMOUNT_NOAUTO = 2
 369 } zfs_canmount_type_t;
 370
 371 typedef enum {
 372         ZFS_LOGBIAS_LATENCY = 0,
 373         ZFS_LOGBIAS_THROUGHPUT = 1
 374 } zfs_logbias_op_t;
 375
 376 typedef enum zfs_share_op {
 377         ZFS_SHARE_NFS = 0,
 378         ZFS_UNSHARE_NFS = 1,
 379         ZFS_SHARE_SMB = 2,
 380         ZFS_UNSHARE_SMB = 3
 381 } zfs_share_op_t;
 382
 383 typedef enum zfs_smb_acl_op {
 384         ZFS_SMB_ACL_ADD,
 385         ZFS_SMB_ACL_REMOVE,
 386         ZFS_SMB_ACL_RENAME,
 387         ZFS_SMB_ACL_PURGE
 388 } zfs_smb_acl_op_t;
 389
 390 typedef enum zfs_cache_type {
 391         ZFS_CACHE_NONE = 0,
 392         ZFS_CACHE_METADATA = 1,
 393         ZFS_CACHE_ALL = 2
 394 } zfs_cache_type_t;
 395
 396 typedef enum {
 397         ZFS_SYNC_STANDARD = 0,
 398         ZFS_SYNC_ALWAYS = 1,
 399         ZFS_SYNC_DISABLED = 2
 400 } zfs_sync_type_t;
 401
 402 typedef enum {
 403         ZFS_XATTR_OFF = 0,
 404         ZFS_XATTR_DIR = 1,
 405         ZFS_XATTR_SA = 2
 406 } zfs_xattr_type_t;
 407
 408 typedef enum {
 409         ZFS_DNSIZE_LEGACY = 0,
 410         ZFS_DNSIZE_AUTO = 1,
 411         ZFS_DNSIZE_1K = 1024,
 412         ZFS_DNSIZE_2K = 2048,
 413         ZFS_DNSIZE_4K = 4096,
 414         ZFS_DNSIZE_8K = 8192,
 415         ZFS_DNSIZE_16K = 16384
 416 } zfs_dnsize_type_t;
 417
 418 typedef enum {
 419         ZFS_REDUNDANT_METADATA_ALL,
 420         ZFS_REDUNDANT_METADATA_MOST
 421 } zfs_redundant_metadata_type_t;
 422
 423 typedef enum {
 424         ZFS_VOLMODE_DEFAULT = 0,
 425         ZFS_VOLMODE_GEOM = 1,
 426         ZFS_VOLMODE_DEV = 2,
 427         ZFS_VOLMODE_NONE = 3
 428 } zfs_volmode_t;
 429
 430 typedef enum zfs_keystatus {
 431         ZFS_KEYSTATUS_NONE = 0,
 432         ZFS_KEYSTATUS_UNAVAILABLE,
 433         ZFS_KEYSTATUS_AVAILABLE,
 434 } zfs_keystatus_t;
 435
 436 typedef enum zfs_keyformat {
 437         ZFS_KEYFORMAT_NONE = 0,
 438         ZFS_KEYFORMAT_RAW,
 439         ZFS_KEYFORMAT_HEX,
 440         ZFS_KEYFORMAT_PASSPHRASE,
 441         ZFS_KEYFORMAT_FORMATS
 442 } zfs_keyformat_t;
 443
 444 typedef enum zfs_key_location {
 445         ZFS_KEYLOCATION_NONE = 0,
 446         ZFS_KEYLOCATION_PROMPT,
 447         ZFS_KEYLOCATION_URI,
 448         ZFS_KEYLOCATION_LOCATIONS
 449 } zfs_keylocation_t;
 450
 451 #define DEFAULT_PBKDF2_ITERATIONS 350000
 452 #define MIN_PBKDF2_ITERATIONS 100000
 453
 454 /*
 455  * On-disk version number.
 456  */
 457 #define SPA_VERSION_1                   1ULL
 458 #define SPA_VERSION_2                   2ULL
 459 #define SPA_VERSION_3                   3ULL
 460 #define SPA_VERSION_4                   4ULL
 461 #define SPA_VERSION_5                   5ULL
 462 #define SPA_VERSION_6                   6ULL
 463 #define SPA_VERSION_7                   7ULL
 464 #define SPA_VERSION_8                   8ULL
 465 #define SPA_VERSION_9                   9ULL
 466 #define SPA_VERSION_10                  10ULL
 467 #define SPA_VERSION_11                  11ULL
 468 #define SPA_VERSION_12                  12ULL
 469 #define SPA_VERSION_13                  13ULL
 470 #define SPA_VERSION_14                  14ULL
 471 #define SPA_VERSION_15                  15ULL
 472 #define SPA_VERSION_16                  16ULL
 473 #define SPA_VERSION_17                  17ULL
 474 #define SPA_VERSION_18                  18ULL
 475 #define SPA_VERSION_19                  19ULL
 476 #define SPA_VERSION_20                  20ULL
 477 #define SPA_VERSION_21                  21ULL
 478 #define SPA_VERSION_22                  22ULL
 479 #define SPA_VERSION_23                  23ULL
 480 #define SPA_VERSION_24                  24ULL
 481 #define SPA_VERSION_25                  25ULL
 482 #define SPA_VERSION_26                  26ULL
 483 #define SPA_VERSION_27                  27ULL
 484 #define SPA_VERSION_28                  28ULL
 485 #define SPA_VERSION_5000                5000ULL
 486
 487 /*
 488  * When bumping up SPA_VERSION, make sure GRUB ZFS understands the on-disk
 489  * format change. Go to usr/src/grub/grub-0.97/stage2/{zfs-include/, fsys_zfs*},
 490  * and do the appropriate changes.  Also bump the version number in
 491  * usr/src/grub/capability.
 492  */
 493 #define SPA_VERSION                     SPA_VERSION_5000
 494 #define SPA_VERSION_STRING              "5000"
 495
 496 /*
 497  * Symbolic names for the changes that caused a SPA_VERSION switch.
 498  * Used in the code when checking for presence or absence of a feature.
 499  * Feel free to define multiple symbolic names for each version if there
 500  * were multiple changes to on-disk structures during that version.
 501  *
 502  * NOTE: When checking the current SPA_VERSION in your code, be sure
 503  *       to use spa_version() since it reports the version of the
 504  *       last synced uberblock.  Checking the in-flight version can
 505  *       be dangerous in some cases.
 506  */
 507 #define SPA_VERSION_INITIAL             SPA_VERSION_1
 508 #define SPA_VERSION_DITTO_BLOCKS        SPA_VERSION_2
 509 #define SPA_VERSION_SPARES              SPA_VERSION_3
 510 #define SPA_VERSION_RAIDZ2              SPA_VERSION_3
 511 #define SPA_VERSION_BPOBJ_ACCOUNT       SPA_VERSION_3
 512 #define SPA_VERSION_RAIDZ_DEFLATE       SPA_VERSION_3
 513 #define SPA_VERSION_DNODE_BYTES         SPA_VERSION_3
 514 #define SPA_VERSION_ZPOOL_HISTORY       SPA_VERSION_4
 515 #define SPA_VERSION_GZIP_COMPRESSION    SPA_VERSION_5
 516 #define SPA_VERSION_BOOTFS              SPA_VERSION_6
 517 #define SPA_VERSION_SLOGS               SPA_VERSION_7
 518 #define SPA_VERSION_DELEGATED_PERMS     SPA_VERSION_8
 519 #define SPA_VERSION_FUID                SPA_VERSION_9
 520 #define SPA_VERSION_REFRESERVATION      SPA_VERSION_9
 521 #define SPA_VERSION_REFQUOTA            SPA_VERSION_9
 522 #define SPA_VERSION_UNIQUE_ACCURATE     SPA_VERSION_9
 523 #define SPA_VERSION_L2CACHE             SPA_VERSION_10
 524 #define SPA_VERSION_NEXT_CLONES         SPA_VERSION_11
 525 #define SPA_VERSION_ORIGIN              SPA_VERSION_11
 526 #define SPA_VERSION_DSL_SCRUB           SPA_VERSION_11
 527 #define SPA_VERSION_SNAP_PROPS          SPA_VERSION_12
 528 #define SPA_VERSION_USED_BREAKDOWN      SPA_VERSION_13
 529 #define SPA_VERSION_PASSTHROUGH_X       SPA_VERSION_14
 530 #define SPA_VERSION_USERSPACE           SPA_VERSION_15
 531 #define SPA_VERSION_STMF_PROP           SPA_VERSION_16
 532 #define SPA_VERSION_RAIDZ3              SPA_VERSION_17
 533 #define SPA_VERSION_USERREFS            SPA_VERSION_18
 534 #define SPA_VERSION_HOLES               SPA_VERSION_19
 535 #define SPA_VERSION_ZLE_COMPRESSION     SPA_VERSION_20
 536 #define SPA_VERSION_DEDUP               SPA_VERSION_21
 537 #define SPA_VERSION_RECVD_PROPS         SPA_VERSION_22
 538 #define SPA_VERSION_SLIM_ZIL            SPA_VERSION_23
 539 #define SPA_VERSION_SA                  SPA_VERSION_24
 540 #define SPA_VERSION_SCAN                SPA_VERSION_25
 541 #define SPA_VERSION_DIR_CLONES          SPA_VERSION_26
 542 #define SPA_VERSION_DEADLISTS           SPA_VERSION_26
 543 #define SPA_VERSION_FAST_SNAP           SPA_VERSION_27
 544 #define SPA_VERSION_MULTI_REPLACE       SPA_VERSION_28
 545 #define SPA_VERSION_BEFORE_FEATURES     SPA_VERSION_28
 546 #define SPA_VERSION_FEATURES            SPA_VERSION_5000
 547
 548 #define SPA_VERSION_IS_SUPPORTED(v) \
 549         (((v) >= SPA_VERSION_INITIAL && (v) <= SPA_VERSION_BEFORE_FEATURES) || \
 550         ((v) >= SPA_VERSION_FEATURES && (v) <= SPA_VERSION))
 551
 552 /*
 553  * ZPL version - rev'd whenever an incompatible on-disk format change
 554  * occurs.  This is independent of SPA/DMU/ZAP versioning.  You must
 555  * also update the version_table[] and help message in zfs_prop.c.
 556  *
 557  * When changing, be sure to teach GRUB how to read the new format!
 558  * See usr/src/grub/grub-0.97/stage2/{zfs-include/,fsys_zfs*}
 559  */
 560 #define ZPL_VERSION_1                   1ULL
 561 #define ZPL_VERSION_2                   2ULL
 562 #define ZPL_VERSION_3                   3ULL
 563 #define ZPL_VERSION_4                   4ULL
 564 #define ZPL_VERSION_5                   5ULL
 565 #define ZPL_VERSION                     ZPL_VERSION_5
 566 #define ZPL_VERSION_STRING              "5"
 567
 568 #define ZPL_VERSION_INITIAL             ZPL_VERSION_1
 569 #define ZPL_VERSION_DIRENT_TYPE         ZPL_VERSION_2
 570 #define ZPL_VERSION_FUID                ZPL_VERSION_3
 571 #define ZPL_VERSION_NORMALIZATION       ZPL_VERSION_3
 572 #define ZPL_VERSION_SYSATTR             ZPL_VERSION_3
 573 #define ZPL_VERSION_USERSPACE           ZPL_VERSION_4
 574 #define ZPL_VERSION_SA                  ZPL_VERSION_5
 575
 576 /* Rewind policy information */
 577 #define ZPOOL_NO_REWIND         1  /* No policy - default behavior */
 578 #define ZPOOL_NEVER_REWIND      2  /* Do not search for best txg or rewind */
 579 #define ZPOOL_TRY_REWIND        4  /* Search for best txg, but do not rewind */
 580 #define ZPOOL_DO_REWIND         8  /* Rewind to best txg w/in deferred frees */
 581 #define ZPOOL_EXTREME_REWIND    16 /* Allow extreme measures to find best txg */
 582 #define ZPOOL_REWIND_MASK       28 /* All the possible rewind bits */
 583 #define ZPOOL_REWIND_POLICIES   31 /* All the possible policy bits */
 584
 585 typedef struct zpool_load_policy {
 586         uint32_t        zlp_rewind;     /* rewind policy requested */
 587         uint64_t        zlp_maxmeta;    /* max acceptable meta-data errors */
 588         uint64_t        zlp_maxdata;    /* max acceptable data errors */
 589         uint64_t        zlp_txg;        /* specific txg to load */
 590 } zpool_load_policy_t;
 591
 592 /*
 593  * The following are configuration names used in the nvlist describing a pool's
 594  * configuration.  New on-disk names should be prefixed with "<reverse-DNS>:"
 595  * (e.g. "org.open-zfs:") to avoid conflicting names being developed
 596  * independently.
 597  */
 598 #define ZPOOL_CONFIG_VERSION            "version"
 599 #define ZPOOL_CONFIG_POOL_NAME          "name"
 600 #define ZPOOL_CONFIG_POOL_STATE         "state"
 601 #define ZPOOL_CONFIG_POOL_TXG           "txg"
 602 #define ZPOOL_CONFIG_POOL_GUID          "pool_guid"
 603 #define ZPOOL_CONFIG_CREATE_TXG         "create_txg"
 604 #define ZPOOL_CONFIG_TOP_GUID           "top_guid"
 605 #define ZPOOL_CONFIG_VDEV_TREE          "vdev_tree"
 606 #define ZPOOL_CONFIG_TYPE               "type"
 607 #define ZPOOL_CONFIG_CHILDREN           "children"
 608 #define ZPOOL_CONFIG_ID                 "id"
 609 #define ZPOOL_CONFIG_GUID               "guid"
 610 #define ZPOOL_CONFIG_INDIRECT_OBJECT    "com.delphix:indirect_object"
 611 #define ZPOOL_CONFIG_INDIRECT_BIRTHS    "com.delphix:indirect_births"
 612 #define ZPOOL_CONFIG_PREV_INDIRECT_VDEV "com.delphix:prev_indirect_vdev"
 613 #define ZPOOL_CONFIG_PATH               "path"
 614 #define ZPOOL_CONFIG_DEVID              "devid"
 615 #define ZPOOL_CONFIG_METASLAB_ARRAY     "metaslab_array"
 616 #define ZPOOL_CONFIG_METASLAB_SHIFT     "metaslab_shift"
 617 #define ZPOOL_CONFIG_ASHIFT             "ashift"
 618 #define ZPOOL_CONFIG_ASIZE              "asize"
 619 #define ZPOOL_CONFIG_DTL                "DTL"
 620 #define ZPOOL_CONFIG_SCAN_STATS         "scan_stats"    /* not stored on disk */
 621 #define ZPOOL_CONFIG_REMOVAL_STATS      "removal_stats" /* not stored on disk */
 622 #define ZPOOL_CONFIG_CHECKPOINT_STATS   "checkpoint_stats" /* not on disk */
 623 #define ZPOOL_CONFIG_VDEV_STATS         "vdev_stats"    /* not stored on disk */
 624 #define ZPOOL_CONFIG_INDIRECT_SIZE      "indirect_size" /* not stored on disk */
 625
 626 /* container nvlist of extended stats */
 627 #define ZPOOL_CONFIG_VDEV_STATS_EX      "vdev_stats_ex"
 628
 629 /* Active queue read/write stats */
 630 #define ZPOOL_CONFIG_VDEV_SYNC_R_ACTIVE_QUEUE   "vdev_sync_r_active_queue"
 631 #define ZPOOL_CONFIG_VDEV_SYNC_W_ACTIVE_QUEUE   "vdev_sync_w_active_queue"
 632 #define ZPOOL_CONFIG_VDEV_ASYNC_R_ACTIVE_QUEUE  "vdev_async_r_active_queue"
 633 #define ZPOOL_CONFIG_VDEV_ASYNC_W_ACTIVE_QUEUE  "vdev_async_w_active_queue"
 634 #define ZPOOL_CONFIG_VDEV_SCRUB_ACTIVE_QUEUE    "vdev_async_scrub_active_queue"
 635
 636 /* Queue sizes */
 637 #define ZPOOL_CONFIG_VDEV_SYNC_R_PEND_QUEUE     "vdev_sync_r_pend_queue"
 638 #define ZPOOL_CONFIG_VDEV_SYNC_W_PEND_QUEUE     "vdev_sync_w_pend_queue"
 639 #define ZPOOL_CONFIG_VDEV_ASYNC_R_PEND_QUEUE    "vdev_async_r_pend_queue"
 640 #define ZPOOL_CONFIG_VDEV_ASYNC_W_PEND_QUEUE    "vdev_async_w_pend_queue"
 641 #define ZPOOL_CONFIG_VDEV_SCRUB_PEND_QUEUE      "vdev_async_scrub_pend_queue"
 642
 643 /* Latency read/write histogram stats */
 644 #define ZPOOL_CONFIG_VDEV_TOT_R_LAT_HISTO       "vdev_tot_r_lat_histo"
 645 #define ZPOOL_CONFIG_VDEV_TOT_W_LAT_HISTO       "vdev_tot_w_lat_histo"
 646 #define ZPOOL_CONFIG_VDEV_DISK_R_LAT_HISTO      "vdev_disk_r_lat_histo"
 647 #define ZPOOL_CONFIG_VDEV_DISK_W_LAT_HISTO      "vdev_disk_w_lat_histo"
 648 #define ZPOOL_CONFIG_VDEV_SYNC_R_LAT_HISTO      "vdev_sync_r_lat_histo"
 649 #define ZPOOL_CONFIG_VDEV_SYNC_W_LAT_HISTO      "vdev_sync_w_lat_histo"
 650 #define ZPOOL_CONFIG_VDEV_ASYNC_R_LAT_HISTO     "vdev_async_r_lat_histo"
 651 #define ZPOOL_CONFIG_VDEV_ASYNC_W_LAT_HISTO     "vdev_async_w_lat_histo"
 652 #define ZPOOL_CONFIG_VDEV_SCRUB_LAT_HISTO       "vdev_scrub_histo"
 653
 654 /* Request size histograms */
 655 #define ZPOOL_CONFIG_VDEV_SYNC_IND_R_HISTO      "vdev_sync_ind_r_histo"
 656 #define ZPOOL_CONFIG_VDEV_SYNC_IND_W_HISTO      "vdev_sync_ind_w_histo"
 657 #define ZPOOL_CONFIG_VDEV_ASYNC_IND_R_HISTO     "vdev_async_ind_r_histo"
 658 #define ZPOOL_CONFIG_VDEV_ASYNC_IND_W_HISTO     "vdev_async_ind_w_histo"
 659 #define ZPOOL_CONFIG_VDEV_IND_SCRUB_HISTO       "vdev_ind_scrub_histo"
 660 #define ZPOOL_CONFIG_VDEV_SYNC_AGG_R_HISTO      "vdev_sync_agg_r_histo"
 661 #define ZPOOL_CONFIG_VDEV_SYNC_AGG_W_HISTO      "vdev_sync_agg_w_histo"
 662 #define ZPOOL_CONFIG_VDEV_ASYNC_AGG_R_HISTO     "vdev_async_agg_r_histo"
 663 #define ZPOOL_CONFIG_VDEV_ASYNC_AGG_W_HISTO     "vdev_async_agg_w_histo"
 664 #define ZPOOL_CONFIG_VDEV_AGG_SCRUB_HISTO       "vdev_agg_scrub_histo"
 665
 666 /* vdev enclosure sysfs path */
 667 #define ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH        "vdev_enc_sysfs_path"
 668
 669 #define ZPOOL_CONFIG_WHOLE_DISK         "whole_disk"
 670 #define ZPOOL_CONFIG_ERRCOUNT           "error_count"
 671 #define ZPOOL_CONFIG_NOT_PRESENT        "not_present"
 672 #define ZPOOL_CONFIG_SPARES             "spares"
 673 #define ZPOOL_CONFIG_IS_SPARE           "is_spare"
 674 #define ZPOOL_CONFIG_NPARITY            "nparity"
 675 #define ZPOOL_CONFIG_HOSTID             "hostid"
 676 #define ZPOOL_CONFIG_HOSTNAME           "hostname"
 677 #define ZPOOL_CONFIG_LOADED_TIME        "initial_load_time"
 678 #define ZPOOL_CONFIG_UNSPARE            "unspare"
 679 #define ZPOOL_CONFIG_PHYS_PATH          "phys_path"
 680 #define ZPOOL_CONFIG_IS_LOG             "is_log"
 681 #define ZPOOL_CONFIG_L2CACHE            "l2cache"
 682 #define ZPOOL_CONFIG_HOLE_ARRAY         "hole_array"
 683 #define ZPOOL_CONFIG_VDEV_CHILDREN      "vdev_children"
 684 #define ZPOOL_CONFIG_IS_HOLE            "is_hole"
 685 #define ZPOOL_CONFIG_DDT_HISTOGRAM      "ddt_histogram"
 686 #define ZPOOL_CONFIG_DDT_OBJ_STATS      "ddt_object_stats"
 687 #define ZPOOL_CONFIG_DDT_STATS          "ddt_stats"
 688 #define ZPOOL_CONFIG_SPLIT              "splitcfg"
 689 #define ZPOOL_CONFIG_ORIG_GUID          "orig_guid"
 690 #define ZPOOL_CONFIG_SPLIT_GUID         "split_guid"
 691 #define ZPOOL_CONFIG_SPLIT_LIST         "guid_list"
 692 #define ZPOOL_CONFIG_REMOVING           "removing"
 693 #define ZPOOL_CONFIG_RESILVER_TXG       "resilver_txg"
 694 #define ZPOOL_CONFIG_COMMENT            "comment"
 695 #define ZPOOL_CONFIG_SUSPENDED          "suspended"     /* not stored on disk */
 696 #define ZPOOL_CONFIG_SUSPENDED_REASON   "suspended_reason"      /* not stored */
 697 #define ZPOOL_CONFIG_TIMESTAMP          "timestamp"     /* not stored on disk */
 698 #define ZPOOL_CONFIG_BOOTFS             "bootfs"        /* not stored on disk */
 699 #define ZPOOL_CONFIG_MISSING_DEVICES    "missing_vdevs" /* not stored on disk */
 700 #define ZPOOL_CONFIG_LOAD_INFO          "load_info"     /* not stored on disk */
 701 #define ZPOOL_CONFIG_REWIND_INFO        "rewind_info"   /* not stored on disk */
 702 #define ZPOOL_CONFIG_UNSUP_FEAT         "unsup_feat"    /* not stored on disk */
 703 #define ZPOOL_CONFIG_ENABLED_FEAT       "enabled_feat"  /* not stored on disk */
 704 #define ZPOOL_CONFIG_CAN_RDONLY         "can_rdonly"    /* not stored on disk */
 705 #define ZPOOL_CONFIG_FEATURES_FOR_READ  "features_for_read"
 706 #define ZPOOL_CONFIG_FEATURE_STATS      "feature_stats" /* not stored on disk */
 707 #define ZPOOL_CONFIG_ERRATA             "errata"        /* not stored on disk */
 708 #define ZPOOL_CONFIG_VDEV_TOP_ZAP       "com.delphix:vdev_zap_top"
 709 #define ZPOOL_CONFIG_VDEV_LEAF_ZAP      "com.delphix:vdev_zap_leaf"
 710 #define ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS  "com.delphix:has_per_vdev_zaps"
 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_HOSTNAME       "mmp_hostname"  /* not stored on disk */
 715 #define ZPOOL_CONFIG_MMP_HOSTID         "mmp_hostid"    /* not stored on disk */
 716
 717 /*
 718  * The persistent vdev state is stored as separate values rather than a single
 719  * 'vdev_state' entry.  This is because a device can be in multiple states, such
 720  * as offline and degraded.
 721  */
 722 #define ZPOOL_CONFIG_OFFLINE            "offline"
 723 #define ZPOOL_CONFIG_FAULTED            "faulted"
 724 #define ZPOOL_CONFIG_DEGRADED           "degraded"
 725 #define ZPOOL_CONFIG_REMOVED            "removed"
 726 #define ZPOOL_CONFIG_FRU                "fru"
 727 #define ZPOOL_CONFIG_AUX_STATE          "aux_state"
 728
 729 /* Pool load policy parameters */
 730 #define ZPOOL_LOAD_POLICY               "load-policy"
 731 #define ZPOOL_LOAD_REWIND_POLICY        "load-rewind-policy"
 732 #define ZPOOL_LOAD_REQUEST_TXG          "load-request-txg"
 733 #define ZPOOL_LOAD_META_THRESH          "load-meta-thresh"
 734 #define ZPOOL_LOAD_DATA_THRESH          "load-data-thresh"
 735
 736 /* Rewind data discovered */
 737 #define ZPOOL_CONFIG_LOAD_TIME          "rewind_txg_ts"
 738 #define ZPOOL_CONFIG_LOAD_DATA_ERRORS   "verify_data_errors"
 739 #define ZPOOL_CONFIG_REWIND_TIME        "seconds_of_rewind"
 740
 741 #define VDEV_TYPE_ROOT                  "root"
 742 #define VDEV_TYPE_MIRROR                "mirror"
 743 #define VDEV_TYPE_REPLACING             "replacing"
 744 #define VDEV_TYPE_RAIDZ                 "raidz"
 745 #define VDEV_TYPE_DISK                  "disk"
 746 #define VDEV_TYPE_FILE                  "file"
 747 #define VDEV_TYPE_MISSING               "missing"
 748 #define VDEV_TYPE_HOLE                  "hole"
 749 #define VDEV_TYPE_SPARE                 "spare"
 750 #define VDEV_TYPE_LOG                   "log"
 751 #define VDEV_TYPE_L2CACHE               "l2cache"
 752 #define VDEV_TYPE_INDIRECT              "indirect"
 753
 754 /* VDEV_TOP_ZAP_* are used in top-level vdev ZAP objects. */
 755 #define VDEV_TOP_ZAP_INDIRECT_OBSOLETE_SM \
 756         "com.delphix:indirect_obsolete_sm"
 757 #define VDEV_TOP_ZAP_OBSOLETE_COUNTS_ARE_PRECISE \
 758         "com.delphix:obsolete_counts_are_precise"
 759 #define VDEV_TOP_ZAP_POOL_CHECKPOINT_SM \
 760         "com.delphix:pool_checkpoint_sm"
 761
 762 /*
 763  * This is needed in userland to report the minimum necessary device size.
 764  */
 765 #define SPA_MINDEVSIZE          (64ULL << 20)
 766
 767 /*
 768  * Set if the fragmentation has not yet been calculated. This can happen
 769  * because the space maps have not been upgraded or the histogram feature
 770  * is not enabled.
 771  */
 772 #define ZFS_FRAG_INVALID        UINT64_MAX
 773
 774 /*
 775  * The location of the pool configuration repository, shared between kernel and
 776  * userland.
 777  */
 778 #define ZPOOL_CACHE             "/etc/zfs/zpool.cache"
 779
 780 /*
 781  * vdev states are ordered from least to most healthy.
 782  * A vdev that's CANT_OPEN or below is considered unusable.
 783  */
 784 typedef enum vdev_state {
 785         VDEV_STATE_UNKNOWN = 0, /* Uninitialized vdev                   */
 786         VDEV_STATE_CLOSED,      /* Not currently open                   */
 787         VDEV_STATE_OFFLINE,     /* Not allowed to open                  */
 788         VDEV_STATE_REMOVED,     /* Explicitly removed from system       */
 789         VDEV_STATE_CANT_OPEN,   /* Tried to open, but failed            */
 790         VDEV_STATE_FAULTED,     /* External request to fault device     */
 791         VDEV_STATE_DEGRADED,    /* Replicated vdev with unhealthy kids  */
 792         VDEV_STATE_HEALTHY      /* Presumed good                        */
 793 } vdev_state_t;
 794
 795 #define VDEV_STATE_ONLINE       VDEV_STATE_HEALTHY
 796
 797 /*
 798  * vdev aux states.  When a vdev is in the CANT_OPEN state, the aux field
 799  * of the vdev stats structure uses these constants to distinguish why.
 800  */
 801 typedef enum vdev_aux {
 802         VDEV_AUX_NONE,          /* no error                             */
 803         VDEV_AUX_OPEN_FAILED,   /* ldi_open_*() or vn_open() failed     */
 804         VDEV_AUX_CORRUPT_DATA,  /* bad label or disk contents           */
 805         VDEV_AUX_NO_REPLICAS,   /* insufficient number of replicas      */
 806         VDEV_AUX_BAD_GUID_SUM,  /* vdev guid sum doesn't match          */
 807         VDEV_AUX_TOO_SMALL,     /* vdev size is too small               */
 808         VDEV_AUX_BAD_LABEL,     /* the label is OK but invalid          */
 809         VDEV_AUX_VERSION_NEWER, /* on-disk version is too new           */
 810         VDEV_AUX_VERSION_OLDER, /* on-disk version is too old           */
 811         VDEV_AUX_UNSUP_FEAT,    /* unsupported features                 */
 812         VDEV_AUX_SPARED,        /* hot spare used in another pool       */
 813         VDEV_AUX_ERR_EXCEEDED,  /* too many errors                      */
 814         VDEV_AUX_IO_FAILURE,    /* experienced I/O failure              */
 815         VDEV_AUX_BAD_LOG,       /* cannot read log chain(s)             */
 816         VDEV_AUX_EXTERNAL,      /* external diagnosis or forced fault   */
 817         VDEV_AUX_SPLIT_POOL,    /* vdev was split off into another pool */
 818         VDEV_AUX_BAD_ASHIFT,    /* vdev ashift is invalid               */
 819         VDEV_AUX_EXTERNAL_PERSIST,      /* persistent forced fault      */
 820         VDEV_AUX_ACTIVE,        /* vdev active on a different host      */
 821         VDEV_AUX_CHILDREN_OFFLINE, /* all children are offline          */
 822 } vdev_aux_t;
 823
 824 /*
 825  * pool state.  The following states are written to disk as part of the normal
 826  * SPA lifecycle: ACTIVE, EXPORTED, DESTROYED, SPARE, L2CACHE.  The remaining
 827  * states are software abstractions used at various levels to communicate
 828  * pool state.
 829  */
 830 typedef enum pool_state {
 831         POOL_STATE_ACTIVE = 0,          /* In active use                */
 832         POOL_STATE_EXPORTED,            /* Explicitly exported          */
 833         POOL_STATE_DESTROYED,           /* Explicitly destroyed         */
 834         POOL_STATE_SPARE,               /* Reserved for hot spare use   */
 835         POOL_STATE_L2CACHE,             /* Level 2 ARC device           */
 836         POOL_STATE_UNINITIALIZED,       /* Internal spa_t state         */
 837         POOL_STATE_UNAVAIL,             /* Internal libzfs state        */
 838         POOL_STATE_POTENTIALLY_ACTIVE   /* Internal libzfs state        */
 839 } pool_state_t;
 840
 841 /*
 842  * mmp state. The following states provide additional detail describing
 843  * why a pool couldn't be safely imported.
 844  */
 845 typedef enum mmp_state {
 846         MMP_STATE_ACTIVE = 0,           /* In active use                */
 847         MMP_STATE_INACTIVE,             /* Inactive and safe to import  */
 848         MMP_STATE_NO_HOSTID             /* System hostid is not set     */
 849 } mmp_state_t;
 850
 851 /*
 852  * Scan Functions.
 853  */
 854 typedef enum pool_scan_func {
 855         POOL_SCAN_NONE,
 856         POOL_SCAN_SCRUB,
 857         POOL_SCAN_RESILVER,
 858         POOL_SCAN_FUNCS
 859 } pool_scan_func_t;
 860
 861 /*
 862  * Used to control scrub pause and resume.
 863  */
 864 typedef enum pool_scrub_cmd {
 865         POOL_SCRUB_NORMAL = 0,
 866         POOL_SCRUB_PAUSE,
 867         POOL_SCRUB_FLAGS_END
 868 } pool_scrub_cmd_t;
 869
 870 typedef enum {
 871         CS_NONE,
 872         CS_CHECKPOINT_EXISTS,
 873         CS_CHECKPOINT_DISCARDING,
 874         CS_NUM_STATES
 875 } checkpoint_state_t;
 876
 877 typedef struct pool_checkpoint_stat {
 878         uint64_t pcs_state;             /* checkpoint_state_t */
 879         uint64_t pcs_start_time;        /* time checkpoint/discard started */
 880         uint64_t pcs_space;             /* checkpointed space */
 881 } pool_checkpoint_stat_t;
 882
 883 /*
 884  * ZIO types.  Needed to interpret vdev statistics below.
 885  */
 886 typedef enum zio_type {
 887         ZIO_TYPE_NULL = 0,
 888         ZIO_TYPE_READ,
 889         ZIO_TYPE_WRITE,
 890         ZIO_TYPE_FREE,
 891         ZIO_TYPE_CLAIM,
 892         ZIO_TYPE_IOCTL,
 893         ZIO_TYPES
 894 } zio_type_t;
 895
 896 /*
 897  * Pool statistics.  Note: all fields should be 64-bit because this
 898  * is passed between kernel and userland as an nvlist uint64 array.
 899  */
 900 typedef struct pool_scan_stat {
 901         /* values stored on disk */
 902         uint64_t        pss_func;       /* pool_scan_func_t */
 903         uint64_t        pss_state;      /* dsl_scan_state_t */
 904         uint64_t        pss_start_time; /* scan start time */
 905         uint64_t        pss_end_time;   /* scan end time */
 906         uint64_t        pss_to_examine; /* total bytes to scan */
 907         uint64_t        pss_examined;   /* total bytes located by scanner */
 908         uint64_t        pss_to_process; /* total bytes to process */
 909         uint64_t        pss_processed;  /* total processed bytes */
 910         uint64_t        pss_errors;     /* scan errors  */
 911
 912         /* values not stored on disk */
 913         uint64_t        pss_pass_exam; /* examined bytes per scan pass */
 914         uint64_t        pss_pass_start; /* start time of a scan pass */
 915         uint64_t        pss_pass_scrub_pause; /* pause time of a scurb pass */
 916         /* cumulative time scrub spent paused, needed for rate calculation */
 917         uint64_t        pss_pass_scrub_spent_paused;
 918         uint64_t        pss_pass_issued; /* issued bytes per scan pass */
 919         uint64_t        pss_issued;     /* total bytes checked by scanner */
 920 } pool_scan_stat_t;
 921
 922 typedef struct pool_removal_stat {
 923         uint64_t prs_state; /* dsl_scan_state_t */
 924         uint64_t prs_removing_vdev;
 925         uint64_t prs_start_time;
 926         uint64_t prs_end_time;
 927         uint64_t prs_to_copy; /* bytes that need to be copied */
 928         uint64_t prs_copied; /* bytes copied so far */
 929         /*
 930          * bytes of memory used for indirect mappings.
 931          * This includes all removed vdevs.
 932          */
 933         uint64_t prs_mapping_memory;
 934 } pool_removal_stat_t;
 935
 936 typedef enum dsl_scan_state {
 937         DSS_NONE,
 938         DSS_SCANNING,
 939         DSS_FINISHED,
 940         DSS_CANCELED,
 941         DSS_NUM_STATES
 942 } dsl_scan_state_t;
 943
 944 /*
 945  * Errata described by http://zfsonlinux.org/msg/ZFS-8000-ER.  The ordering
 946  * of this enum must be maintained to ensure the errata identifiers map to
 947  * the correct documentation.  New errata may only be appended to the list
 948  * and must contain corresponding documentation at the above link.
 949  */
 950 typedef enum zpool_errata {
 951         ZPOOL_ERRATA_NONE,
 952         ZPOOL_ERRATA_ZOL_2094_SCRUB,
 953         ZPOOL_ERRATA_ZOL_2094_ASYNC_DESTROY,
 954         ZPOOL_ERRATA_ZOL_6845_ENCRYPTION,
 955 } zpool_errata_t;
 956
 957 /*
 958  * Vdev statistics.  Note: all fields should be 64-bit because this
 959  * is passed between kernel and userland as an nvlist uint64 array.
 960  */
 961 typedef struct vdev_stat {
 962         hrtime_t        vs_timestamp;           /* time since vdev load */
 963         uint64_t        vs_state;               /* vdev state           */
 964         uint64_t        vs_aux;                 /* see vdev_aux_t       */
 965         uint64_t        vs_alloc;               /* space allocated      */
 966         uint64_t        vs_space;               /* total capacity       */
 967         uint64_t        vs_dspace;              /* deflated capacity    */
 968         uint64_t        vs_rsize;               /* replaceable dev size */
 969         uint64_t        vs_esize;               /* expandable dev size */
 970         uint64_t        vs_ops[ZIO_TYPES];      /* operation count      */
 971         uint64_t        vs_bytes[ZIO_TYPES];    /* bytes read/written   */
 972         uint64_t        vs_read_errors;         /* read errors          */
 973         uint64_t        vs_write_errors;        /* write errors         */
 974         uint64_t        vs_checksum_errors;     /* checksum errors      */
 975         uint64_t        vs_self_healed;         /* self-healed bytes    */
 976         uint64_t        vs_scan_removing;       /* removing?    */
 977         uint64_t        vs_scan_processed;      /* scan processed bytes */
 978         uint64_t        vs_fragmentation;       /* device fragmentation */
 979         uint64_t        vs_checkpoint_space;    /* checkpoint-consumed space */
 980 } vdev_stat_t;
 981
 982 /*
 983  * Extended stats
 984  *
 985  * These are stats which aren't included in the original iostat output.  For
 986  * convenience, they are grouped together in vdev_stat_ex, although each stat
 987  * is individually exported as an nvlist.
 988  */
 989 typedef struct vdev_stat_ex {
 990         /* Number of ZIOs issued to disk and waiting to finish */
 991         uint64_t vsx_active_queue[ZIO_PRIORITY_NUM_QUEUEABLE];
 992
 993         /* Number of ZIOs pending to be issued to disk */
 994         uint64_t vsx_pend_queue[ZIO_PRIORITY_NUM_QUEUEABLE];
 995
 996         /*
 997          * Below are the histograms for various latencies. Buckets are in
 998          * units of nanoseconds.
 999          */
1000
1001         /*
1002          * 2^37 nanoseconds = 134s. Timeouts will probably start kicking in
1003          * before this.
1004          */
1005 #define VDEV_L_HISTO_BUCKETS 37         /* Latency histo buckets */
1006 #define VDEV_RQ_HISTO_BUCKETS 25        /* Request size histo buckets */
1007
1008
1009         /* Amount of time in ZIO queue (ns) */
1010         uint64_t vsx_queue_histo[ZIO_PRIORITY_NUM_QUEUEABLE]
1011             [VDEV_L_HISTO_BUCKETS];
1012
1013         /* Total ZIO latency (ns).  Includes queuing and disk access time */
1014         uint64_t vsx_total_histo[ZIO_TYPES][VDEV_L_HISTO_BUCKETS];
1015
1016         /* Amount of time to read/write the disk (ns) */
1017         uint64_t vsx_disk_histo[ZIO_TYPES][VDEV_L_HISTO_BUCKETS];
1018
1019         /* "lookup the bucket for a value" histogram macros */
1020 #define HISTO(val, buckets) (val != 0 ? MIN(highbit64(val) - 1, \
1021             buckets - 1) : 0)
1022 #define L_HISTO(a) HISTO(a, VDEV_L_HISTO_BUCKETS)
1023 #define RQ_HISTO(a) HISTO(a, VDEV_RQ_HISTO_BUCKETS)
1024
1025         /* Physical IO histogram */
1026         uint64_t vsx_ind_histo[ZIO_PRIORITY_NUM_QUEUEABLE]
1027             [VDEV_RQ_HISTO_BUCKETS];
1028
1029         /* Delegated (aggregated) physical IO histogram */
1030         uint64_t vsx_agg_histo[ZIO_PRIORITY_NUM_QUEUEABLE]
1031             [VDEV_RQ_HISTO_BUCKETS];
1032
1033 } vdev_stat_ex_t;
1034
1035 /*
1036  * DDT statistics.  Note: all fields should be 64-bit because this
1037  * is passed between kernel and userland as an nvlist uint64 array.
1038  */
1039 typedef struct ddt_object {
1040         uint64_t        ddo_count;      /* number of elements in ddt    */
1041         uint64_t        ddo_dspace;     /* size of ddt on disk          */
1042         uint64_t        ddo_mspace;     /* size of ddt in-core          */
1043 } ddt_object_t;
1044
1045 typedef struct ddt_stat {
1046         uint64_t        dds_blocks;     /* blocks                       */
1047         uint64_t        dds_lsize;      /* logical size                 */
1048         uint64_t        dds_psize;      /* physical size                */
1049         uint64_t        dds_dsize;      /* deflated allocated size      */
1050         uint64_t        dds_ref_blocks; /* referenced blocks            */
1051         uint64_t        dds_ref_lsize;  /* referenced lsize * refcnt    */
1052         uint64_t        dds_ref_psize;  /* referenced psize * refcnt    */
1053         uint64_t        dds_ref_dsize;  /* referenced dsize * refcnt    */
1054 } ddt_stat_t;
1055
1056 typedef struct ddt_histogram {
1057         ddt_stat_t      ddh_stat[64];   /* power-of-two histogram buckets */
1058 } ddt_histogram_t;
1059
1060 #define ZVOL_DRIVER     "zvol"
1061 #define ZFS_DRIVER      "zfs"
1062 #define ZFS_DEV         "/dev/zfs"
1063 #define ZFS_SHARETAB    "/etc/dfs/sharetab"
1064
1065 #define ZFS_SUPER_MAGIC 0x2fc12fc1
1066
1067 /* general zvol path */
1068 #define ZVOL_DIR        "/dev"
1069
1070 #define ZVOL_MAJOR              230
1071 #define ZVOL_MINOR_BITS         4
1072 #define ZVOL_MINOR_MASK         ((1U << ZVOL_MINOR_BITS) - 1)
1073 #define ZVOL_MINORS             (1 << 4)
1074 #define ZVOL_DEV_NAME           "zd"
1075
1076 #define ZVOL_PROP_NAME          "name"
1077 #define ZVOL_DEFAULT_BLOCKSIZE  8192
1078
1079 /*
1080  * /dev/zfs ioctl numbers.
1081  */
1082 typedef enum zfs_ioc {
1083         /*
1084          * Illumos - 71/128 numbers reserved.
1085          */
1086         ZFS_IOC_FIRST = ('Z' << 8),
1087         ZFS_IOC = ZFS_IOC_FIRST,
1088         ZFS_IOC_POOL_CREATE = ZFS_IOC_FIRST,
1089         ZFS_IOC_POOL_DESTROY,
1090         ZFS_IOC_POOL_IMPORT,
1091         ZFS_IOC_POOL_EXPORT,
1092         ZFS_IOC_POOL_CONFIGS,
1093         ZFS_IOC_POOL_STATS,
1094         ZFS_IOC_POOL_TRYIMPORT,
1095         ZFS_IOC_POOL_SCAN,
1096         ZFS_IOC_POOL_FREEZE,
1097         ZFS_IOC_POOL_UPGRADE,
1098         ZFS_IOC_POOL_GET_HISTORY,
1099         ZFS_IOC_VDEV_ADD,
1100         ZFS_IOC_VDEV_REMOVE,
1101         ZFS_IOC_VDEV_SET_STATE,
1102         ZFS_IOC_VDEV_ATTACH,
1103         ZFS_IOC_VDEV_DETACH,
1104         ZFS_IOC_VDEV_SETPATH,
1105         ZFS_IOC_VDEV_SETFRU,
1106         ZFS_IOC_OBJSET_STATS,
1107         ZFS_IOC_OBJSET_ZPLPROPS,
1108         ZFS_IOC_DATASET_LIST_NEXT,
1109         ZFS_IOC_SNAPSHOT_LIST_NEXT,
1110         ZFS_IOC_SET_PROP,
1111         ZFS_IOC_CREATE,
1112         ZFS_IOC_DESTROY,
1113         ZFS_IOC_ROLLBACK,
1114         ZFS_IOC_RENAME,
1115         ZFS_IOC_RECV,
1116         ZFS_IOC_SEND,
1117         ZFS_IOC_INJECT_FAULT,
1118         ZFS_IOC_CLEAR_FAULT,
1119         ZFS_IOC_INJECT_LIST_NEXT,
1120         ZFS_IOC_ERROR_LOG,
1121         ZFS_IOC_CLEAR,
1122         ZFS_IOC_PROMOTE,
1123         ZFS_IOC_SNAPSHOT,
1124         ZFS_IOC_DSOBJ_TO_DSNAME,
1125         ZFS_IOC_OBJ_TO_PATH,
1126         ZFS_IOC_POOL_SET_PROPS,
1127         ZFS_IOC_POOL_GET_PROPS,
1128         ZFS_IOC_SET_FSACL,
1129         ZFS_IOC_GET_FSACL,
1130         ZFS_IOC_SHARE,
1131         ZFS_IOC_INHERIT_PROP,
1132         ZFS_IOC_SMB_ACL,
1133         ZFS_IOC_USERSPACE_ONE,
1134         ZFS_IOC_USERSPACE_MANY,
1135         ZFS_IOC_USERSPACE_UPGRADE,
1136         ZFS_IOC_HOLD,
1137         ZFS_IOC_RELEASE,
1138         ZFS_IOC_GET_HOLDS,
1139         ZFS_IOC_OBJSET_RECVD_PROPS,
1140         ZFS_IOC_VDEV_SPLIT,
1141         ZFS_IOC_NEXT_OBJ,
1142         ZFS_IOC_DIFF,
1143         ZFS_IOC_TMP_SNAPSHOT,
1144         ZFS_IOC_OBJ_TO_STATS,
1145         ZFS_IOC_SPACE_WRITTEN,
1146         ZFS_IOC_SPACE_SNAPS,
1147         ZFS_IOC_DESTROY_SNAPS,
1148         ZFS_IOC_POOL_REGUID,
1149         ZFS_IOC_POOL_REOPEN,
1150         ZFS_IOC_SEND_PROGRESS,
1151         ZFS_IOC_LOG_HISTORY,
1152         ZFS_IOC_SEND_NEW,
1153         ZFS_IOC_SEND_SPACE,
1154         ZFS_IOC_CLONE,
1155         ZFS_IOC_BOOKMARK,
1156         ZFS_IOC_GET_BOOKMARKS,
1157         ZFS_IOC_DESTROY_BOOKMARKS,
1158         ZFS_IOC_CHANNEL_PROGRAM,
1159         ZFS_IOC_RECV_NEW,
1160         ZFS_IOC_POOL_SYNC,
1161         ZFS_IOC_LOAD_KEY,
1162         ZFS_IOC_UNLOAD_KEY,
1163         ZFS_IOC_CHANGE_KEY,
1164         ZFS_IOC_REMAP,
1165         ZFS_IOC_POOL_CHECKPOINT,
1166         ZFS_IOC_POOL_DISCARD_CHECKPOINT,
1167
1168         /*
1169          * Linux - 3/64 numbers reserved.
1170          */
1171         ZFS_IOC_LINUX = ('Z' << 8) + 0x80,
1172         ZFS_IOC_EVENTS_NEXT,
1173         ZFS_IOC_EVENTS_CLEAR,
1174         ZFS_IOC_EVENTS_SEEK,
1175
1176         /*
1177          * FreeBSD - 1/64 numbers reserved.
1178          */
1179         ZFS_IOC_FREEBSD = ('Z' << 8) + 0xC0,
1180
1181         ZFS_IOC_LAST
1182 } zfs_ioc_t;
1183
1184 /*
1185  * zvol ioctl to get dataset name
1186  */
1187 #define BLKZNAME                _IOR(0x12, 125, char[ZFS_MAX_DATASET_NAME_LEN])
1188
1189 /*
1190  * ZFS-specific error codes used for returning descriptive errors
1191  * to the userland through zfs ioctls.
1192  *
1193  * The enum implicitly includes all the error codes from errno.h.
1194  * New code should use and extend this enum for errors that are
1195  * not described precisely by generic errno codes.
1196  */
1197 typedef enum {
1198         ZFS_ERR_CHECKPOINT_EXISTS = 1024,
1199         ZFS_ERR_DISCARDING_CHECKPOINT,
1200         ZFS_ERR_NO_CHECKPOINT,
1201         ZFS_ERR_DEVRM_IN_PROGRESS,
1202         ZFS_ERR_VDEV_TOO_BIG
1203 } zfs_errno_t;
1204
1205 /*
1206  * Internal SPA load state.  Used by FMA diagnosis engine.
1207  */
1208 typedef enum {
1209         SPA_LOAD_NONE,          /* no load in progress  */
1210         SPA_LOAD_OPEN,          /* normal open          */
1211         SPA_LOAD_IMPORT,        /* import in progress   */
1212         SPA_LOAD_TRYIMPORT,     /* tryimport in progress */
1213         SPA_LOAD_RECOVER,       /* recovery requested   */
1214         SPA_LOAD_ERROR,         /* load failed          */
1215         SPA_LOAD_CREATE         /* creation in progress */
1216 } spa_load_state_t;
1217
1218 /*
1219  * Bookmark name values.
1220  */
1221 #define ZPOOL_ERR_LIST          "error list"
1222 #define ZPOOL_ERR_DATASET       "dataset"
1223 #define ZPOOL_ERR_OBJECT        "object"
1224
1225 #define HIS_MAX_RECORD_LEN      (MAXPATHLEN + MAXPATHLEN + 1)
1226
1227 /*
1228  * The following are names used in the nvlist describing
1229  * the pool's history log.
1230  */
1231 #define ZPOOL_HIST_RECORD       "history record"
1232 #define ZPOOL_HIST_TIME         "history time"
1233 #define ZPOOL_HIST_CMD          "history command"
1234 #define ZPOOL_HIST_WHO          "history who"
1235 #define ZPOOL_HIST_ZONE         "history zone"
1236 #define ZPOOL_HIST_HOST         "history hostname"
1237 #define ZPOOL_HIST_TXG          "history txg"
1238 #define ZPOOL_HIST_INT_EVENT    "history internal event"
1239 #define ZPOOL_HIST_INT_STR      "history internal str"
1240 #define ZPOOL_HIST_INT_NAME     "internal_name"
1241 #define ZPOOL_HIST_IOCTL        "ioctl"
1242 #define ZPOOL_HIST_INPUT_NVL    "in_nvl"
1243 #define ZPOOL_HIST_OUTPUT_NVL   "out_nvl"
1244 #define ZPOOL_HIST_DSNAME       "dsname"
1245 #define ZPOOL_HIST_DSID         "dsid"
1246 #define ZPOOL_HIST_ERRNO        "errno"
1247
1248 /*
1249  * Special nvlist name that will not have its args recorded in the pool's
1250  * history log.
1251  */
1252 #define ZPOOL_HIDDEN_ARGS       "hidden_args"
1253
1254 /*
1255  * Flags for ZFS_IOC_VDEV_SET_STATE
1256  */
1257 #define ZFS_ONLINE_CHECKREMOVE  0x1
1258 #define ZFS_ONLINE_UNSPARE      0x2
1259 #define ZFS_ONLINE_FORCEFAULT   0x4
1260 #define ZFS_ONLINE_EXPAND       0x8
1261 #define ZFS_OFFLINE_TEMPORARY   0x1
1262
1263 /*
1264  * Flags for ZFS_IOC_POOL_IMPORT
1265  */
1266 #define ZFS_IMPORT_NORMAL       0x0
1267 #define ZFS_IMPORT_VERBATIM     0x1
1268 #define ZFS_IMPORT_ANY_HOST     0x2
1269 #define ZFS_IMPORT_MISSING_LOG  0x4
1270 #define ZFS_IMPORT_ONLY         0x8
1271 #define ZFS_IMPORT_TEMP_NAME    0x10
1272 #define ZFS_IMPORT_SKIP_MMP     0x20
1273 #define ZFS_IMPORT_LOAD_KEYS    0x40
1274 #define ZFS_IMPORT_CHECKPOINT   0x80
1275
1276 /*
1277  * Channel program argument/return nvlist keys and defaults.
1278  */
1279 #define ZCP_ARG_PROGRAM         "program"
1280 #define ZCP_ARG_ARGLIST         "arg"
1281 #define ZCP_ARG_SYNC            "sync"
1282 #define ZCP_ARG_INSTRLIMIT      "instrlimit"
1283 #define ZCP_ARG_MEMLIMIT        "memlimit"
1284
1285 #define ZCP_ARG_CLIARGV         "argv"
1286
1287 #define ZCP_RET_ERROR           "error"
1288 #define ZCP_RET_RETURN          "return"
1289
1290 #define ZCP_DEFAULT_INSTRLIMIT  (10 * 1000 * 1000)
1291 #define ZCP_MAX_INSTRLIMIT      (10 * ZCP_DEFAULT_INSTRLIMIT)
1292 #define ZCP_DEFAULT_MEMLIMIT    (10 * 1024 * 1024)
1293 #define ZCP_MAX_MEMLIMIT        (10 * ZCP_DEFAULT_MEMLIMIT)
1294
1295 /*
1296  * Sysevent payload members.  ZFS will generate the following sysevents with the
1297  * given payloads:
1298  *
1299  *      ESC_ZFS_RESILVER_START
1300  *      ESC_ZFS_RESILVER_END
1301  *      ESC_ZFS_POOL_DESTROY
1302  *      ESC_ZFS_POOL_REGUID
1303  *
1304  *              ZFS_EV_POOL_NAME        DATA_TYPE_STRING
1305  *              ZFS_EV_POOL_GUID        DATA_TYPE_UINT64
1306  *
1307  *      ESC_ZFS_VDEV_REMOVE
1308  *      ESC_ZFS_VDEV_CLEAR
1309  *      ESC_ZFS_VDEV_CHECK
1310  *
1311  *              ZFS_EV_POOL_NAME        DATA_TYPE_STRING
1312  *              ZFS_EV_POOL_GUID        DATA_TYPE_UINT64
1313  *              ZFS_EV_VDEV_PATH        DATA_TYPE_STRING        (optional)
1314  *              ZFS_EV_VDEV_GUID        DATA_TYPE_UINT64
1315  *
1316  *      ESC_ZFS_HISTORY_EVENT
1317  *
1318  *              ZFS_EV_POOL_NAME        DATA_TYPE_STRING
1319  *              ZFS_EV_POOL_GUID        DATA_TYPE_UINT64
1320  *              ZFS_EV_HIST_TIME        DATA_TYPE_UINT64        (optional)
1321  *              ZFS_EV_HIST_CMD         DATA_TYPE_STRING        (optional)
1322  *              ZFS_EV_HIST_WHO         DATA_TYPE_UINT64        (optional)
1323  *              ZFS_EV_HIST_ZONE        DATA_TYPE_STRING        (optional)
1324  *              ZFS_EV_HIST_HOST        DATA_TYPE_STRING        (optional)
1325  *              ZFS_EV_HIST_TXG         DATA_TYPE_UINT64        (optional)
1326  *              ZFS_EV_HIST_INT_EVENT   DATA_TYPE_UINT64        (optional)
1327  *              ZFS_EV_HIST_INT_STR     DATA_TYPE_STRING        (optional)
1328  *              ZFS_EV_HIST_INT_NAME    DATA_TYPE_STRING        (optional)
1329  *              ZFS_EV_HIST_IOCTL       DATA_TYPE_STRING        (optional)
1330  *              ZFS_EV_HIST_DSNAME      DATA_TYPE_STRING        (optional)
1331  *              ZFS_EV_HIST_DSID        DATA_TYPE_UINT64        (optional)
1332  *
1333  * The ZFS_EV_HIST_* members will correspond to the ZPOOL_HIST_* members in the
1334  * history log nvlist.  The keynames will be free of any spaces or other
1335  * characters that could be potentially unexpected to consumers of the
1336  * sysevents.
1337  */
1338 #define ZFS_EV_POOL_NAME        "pool_name"
1339 #define ZFS_EV_POOL_GUID        "pool_guid"
1340 #define ZFS_EV_VDEV_PATH        "vdev_path"
1341 #define ZFS_EV_VDEV_GUID        "vdev_guid"
1342 #define ZFS_EV_HIST_TIME        "history_time"
1343 #define ZFS_EV_HIST_CMD         "history_command"
1344 #define ZFS_EV_HIST_WHO         "history_who"
1345 #define ZFS_EV_HIST_ZONE        "history_zone"
1346 #define ZFS_EV_HIST_HOST        "history_hostname"
1347 #define ZFS_EV_HIST_TXG         "history_txg"
1348 #define ZFS_EV_HIST_INT_EVENT   "history_internal_event"
1349 #define ZFS_EV_HIST_INT_STR     "history_internal_str"
1350 #define ZFS_EV_HIST_INT_NAME    "history_internal_name"
1351 #define ZFS_EV_HIST_IOCTL       "history_ioctl"
1352 #define ZFS_EV_HIST_DSNAME      "history_dsname"
1353 #define ZFS_EV_HIST_DSID        "history_dsid"
1354
1355 #ifdef  __cplusplus
1356 }
1357 #endif
1358
1359 #endif  /* _SYS_FS_ZFS_H */