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, 2018 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, Intel Corporation.
  29  * Copyright (c) 2019 Datto Inc.
  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 #include <sys/zio_priority.h>
  39
  40 #ifdef  __cplusplus
  41 extern "C" {
  42 #endif
  43
  44 /*
  45  * Types and constants shared between userland and the kernel.
  46  */
  47
  48 /*
  49  * Each dataset can be one of the following types.  These constants can be
  50  * combined into masks that can be passed to various functions.
  51  */
  52 typedef enum {
  53         ZFS_TYPE_FILESYSTEM     = (1 << 0),
  54         ZFS_TYPE_SNAPSHOT       = (1 << 1),
  55         ZFS_TYPE_VOLUME         = (1 << 2),
  56         ZFS_TYPE_POOL           = (1 << 3),
  57         ZFS_TYPE_BOOKMARK       = (1 << 4)
  58 } zfs_type_t;
  59
  60 /*
  61  * NB: lzc_dataset_type should be updated whenever a new objset type is added,
  62  * if it represents a real type of a dataset that can be created from userland.
  63  */
  64 typedef enum dmu_objset_type {
  65         DMU_OST_NONE,
  66         DMU_OST_META,
  67         DMU_OST_ZFS,
  68         DMU_OST_ZVOL,
  69         DMU_OST_OTHER,                  /* For testing only! */
  70         DMU_OST_ANY,                    /* Be careful! */
  71         DMU_OST_NUMTYPES
  72 } dmu_objset_type_t;
  73
  74 #define ZFS_TYPE_DATASET        \
  75         (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME | ZFS_TYPE_SNAPSHOT)
  76
  77 /*
  78  * All of these include the terminating NUL byte.
  79  */
  80 #define ZAP_MAXNAMELEN 256
  81 #define ZAP_MAXVALUELEN (1024 * 8)
  82 #define ZAP_OLDMAXVALUELEN 1024
  83 #define ZFS_MAX_DATASET_NAME_LEN 256
  84
  85 /*
  86  * Dataset properties are identified by these constants and must be added to
  87  * the end of this list to ensure that external consumers are not affected
  88  * by the change. If you make any changes to this list, be sure to update
  89  * the property table in module/zcommon/zfs_prop.c.
  90  */
  91 typedef enum {
  92         ZPROP_CONT = -2,
  93         ZPROP_INVAL = -1,
  94         ZFS_PROP_TYPE = 0,
  95         ZFS_PROP_CREATION,
  96         ZFS_PROP_USED,
  97         ZFS_PROP_AVAILABLE,
  98         ZFS_PROP_REFERENCED,
  99         ZFS_PROP_COMPRESSRATIO,
 100         ZFS_PROP_MOUNTED,
 101         ZFS_PROP_ORIGIN,
 102         ZFS_PROP_QUOTA,
 103         ZFS_PROP_RESERVATION,
 104         ZFS_PROP_VOLSIZE,
 105         ZFS_PROP_VOLBLOCKSIZE,
 106         ZFS_PROP_RECORDSIZE,
 107         ZFS_PROP_MOUNTPOINT,
 108         ZFS_PROP_SHARENFS,
 109         ZFS_PROP_CHECKSUM,
 110         ZFS_PROP_COMPRESSION,
 111         ZFS_PROP_ATIME,
 112         ZFS_PROP_DEVICES,
 113         ZFS_PROP_EXEC,
 114         ZFS_PROP_SETUID,
 115         ZFS_PROP_READONLY,
 116         ZFS_PROP_ZONED,
 117         ZFS_PROP_SNAPDIR,
 118         ZFS_PROP_PRIVATE,               /* not exposed to user, temporary */
 119         ZFS_PROP_ACLINHERIT,
 120         ZFS_PROP_CREATETXG,
 121         ZFS_PROP_NAME,                  /* not exposed to the user */
 122         ZFS_PROP_CANMOUNT,
 123         ZFS_PROP_ISCSIOPTIONS,          /* not exposed to the user */
 124         ZFS_PROP_XATTR,
 125         ZFS_PROP_NUMCLONES,             /* not exposed to the user */
 126         ZFS_PROP_COPIES,
 127         ZFS_PROP_VERSION,
 128         ZFS_PROP_UTF8ONLY,
 129         ZFS_PROP_NORMALIZE,
 130         ZFS_PROP_CASE,
 131         ZFS_PROP_VSCAN,
 132         ZFS_PROP_NBMAND,
 133         ZFS_PROP_SHARESMB,
 134         ZFS_PROP_REFQUOTA,
 135         ZFS_PROP_REFRESERVATION,
 136         ZFS_PROP_GUID,
 137         ZFS_PROP_PRIMARYCACHE,
 138         ZFS_PROP_SECONDARYCACHE,
 139         ZFS_PROP_USEDSNAP,
 140         ZFS_PROP_USEDDS,
 141         ZFS_PROP_USEDCHILD,
 142         ZFS_PROP_USEDREFRESERV,
 143         ZFS_PROP_USERACCOUNTING,        /* not exposed to the user */
 144         ZFS_PROP_STMF_SHAREINFO,        /* not exposed to the user */
 145         ZFS_PROP_DEFER_DESTROY,
 146         ZFS_PROP_USERREFS,
 147         ZFS_PROP_LOGBIAS,
 148         ZFS_PROP_UNIQUE,                /* not exposed to the user */
 149         ZFS_PROP_OBJSETID,
 150         ZFS_PROP_DEDUP,
 151         ZFS_PROP_MLSLABEL,
 152         ZFS_PROP_SYNC,
 153         ZFS_PROP_DNODESIZE,
 154         ZFS_PROP_REFRATIO,
 155         ZFS_PROP_WRITTEN,
 156         ZFS_PROP_CLONES,
 157         ZFS_PROP_LOGICALUSED,
 158         ZFS_PROP_LOGICALREFERENCED,
 159         ZFS_PROP_INCONSISTENT,          /* not exposed to the user */
 160         ZFS_PROP_VOLMODE,
 161         ZFS_PROP_FILESYSTEM_LIMIT,
 162         ZFS_PROP_SNAPSHOT_LIMIT,
 163         ZFS_PROP_FILESYSTEM_COUNT,
 164         ZFS_PROP_SNAPSHOT_COUNT,
 165         ZFS_PROP_SNAPDEV,
 166         ZFS_PROP_ACLTYPE,
 167         ZFS_PROP_SELINUX_CONTEXT,
 168         ZFS_PROP_SELINUX_FSCONTEXT,
 169         ZFS_PROP_SELINUX_DEFCONTEXT,
 170         ZFS_PROP_SELINUX_ROOTCONTEXT,
 171         ZFS_PROP_RELATIME,
 172         ZFS_PROP_REDUNDANT_METADATA,
 173         ZFS_PROP_OVERLAY,
 174         ZFS_PROP_PREV_SNAP,
 175         ZFS_PROP_RECEIVE_RESUME_TOKEN,
 176         ZFS_PROP_ENCRYPTION,
 177         ZFS_PROP_KEYLOCATION,
 178         ZFS_PROP_KEYFORMAT,
 179         ZFS_PROP_PBKDF2_SALT,
 180         ZFS_PROP_PBKDF2_ITERS,
 181         ZFS_PROP_ENCRYPTION_ROOT,
 182         ZFS_PROP_KEY_GUID,
 183         ZFS_PROP_KEYSTATUS,
 184         ZFS_PROP_REMAPTXG,              /* not exposed to the user */
 185         ZFS_PROP_SPECIAL_SMALL_BLOCKS,
 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 module/zcommon/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_ASHIFT,
 236         ZPOOL_PROP_COMMENT,
 237         ZPOOL_PROP_EXPANDSZ,
 238         ZPOOL_PROP_FREEING,
 239         ZPOOL_PROP_FRAGMENTATION,
 240         ZPOOL_PROP_LEAKED,
 241         ZPOOL_PROP_MAXBLOCKSIZE,
 242         ZPOOL_PROP_TNAME,
 243         ZPOOL_PROP_MAXDNODESIZE,
 244         ZPOOL_PROP_MULTIHOST,
 245         ZPOOL_PROP_CHECKPOINT,
 246         ZPOOL_PROP_LOAD_GUID,
 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(1M). */
 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  "$recvd"
 269 #define ZPROP_N_MORE_ERRORS     "N_MORE_ERRORS"
 270
 271 /*
 272  * Dataset flag implemented as a special entry in the props zap object
 273  * indicating that the dataset has received properties on or after
 274  * SPA_VERSION_RECVD_PROPS. The first such receive blows away local properties
 275  * just as it did in earlier versions, and thereafter, local properties are
 276  * preserved.
 277  */
 278 #define ZPROP_HAS_RECVD         "$hasrecvd"
 279
 280 typedef enum {
 281         ZPROP_ERR_NOCLEAR = 0x1, /* failure to clear existing props */
 282         ZPROP_ERR_NORESTORE = 0x2 /* failure to restore props on error */
 283 } zprop_errflags_t;
 284
 285 typedef int (*zprop_func)(int, void *);
 286
 287 /*
 288  * Properties to be set on the root file system of a new pool
 289  * are stuffed into their own nvlist, which is then included in
 290  * the properties nvlist with the pool properties.
 291  */
 292 #define ZPOOL_ROOTFS_PROPS      "root-props-nvl"
 293
 294 /*
 295  * Length of 'written@' and 'written#'
 296  */
 297 #define ZFS_WRITTEN_PROP_PREFIX_LEN     8
 298
 299 /*
 300  * Dataset property functions shared between libzfs and kernel.
 301  */
 302 const char *zfs_prop_default_string(zfs_prop_t);
 303 uint64_t zfs_prop_default_numeric(zfs_prop_t);
 304 boolean_t zfs_prop_readonly(zfs_prop_t);
 305 boolean_t zfs_prop_visible(zfs_prop_t prop);
 306 boolean_t zfs_prop_inheritable(zfs_prop_t);
 307 boolean_t zfs_prop_setonce(zfs_prop_t);
 308 boolean_t zfs_prop_encryption_key_param(zfs_prop_t);
 309 boolean_t zfs_prop_valid_keylocation(const char *, boolean_t);
 310 const char *zfs_prop_to_name(zfs_prop_t);
 311 zfs_prop_t zfs_name_to_prop(const char *);
 312 boolean_t zfs_prop_user(const char *);
 313 boolean_t zfs_prop_userquota(const char *);
 314 boolean_t zfs_prop_written(const char *);
 315 int zfs_prop_index_to_string(zfs_prop_t, uint64_t, const char **);
 316 int zfs_prop_string_to_index(zfs_prop_t, const char *, uint64_t *);
 317 uint64_t zfs_prop_random_value(zfs_prop_t, uint64_t seed);
 318 boolean_t zfs_prop_valid_for_type(int, zfs_type_t, boolean_t);
 319
 320 /*
 321  * Pool property functions shared between libzfs and kernel.
 322  */
 323 zpool_prop_t zpool_name_to_prop(const char *);
 324 const char *zpool_prop_to_name(zpool_prop_t);
 325 const char *zpool_prop_default_string(zpool_prop_t);
 326 uint64_t zpool_prop_default_numeric(zpool_prop_t);
 327 boolean_t zpool_prop_readonly(zpool_prop_t);
 328 boolean_t zpool_prop_setonce(zpool_prop_t);
 329 boolean_t zpool_prop_feature(const char *);
 330 boolean_t zpool_prop_unsupported(const char *);
 331 int zpool_prop_index_to_string(zpool_prop_t, uint64_t, const char **);
 332 int zpool_prop_string_to_index(zpool_prop_t, const char *, uint64_t *);
 333 uint64_t zpool_prop_random_value(zpool_prop_t, uint64_t seed);
 334
 335 /*
 336  * Definitions for the Delegation.
 337  */
 338 typedef enum {
 339         ZFS_DELEG_WHO_UNKNOWN = 0,
 340         ZFS_DELEG_USER = 'u',
 341         ZFS_DELEG_USER_SETS = 'U',
 342         ZFS_DELEG_GROUP = 'g',
 343         ZFS_DELEG_GROUP_SETS = 'G',
 344         ZFS_DELEG_EVERYONE = 'e',
 345         ZFS_DELEG_EVERYONE_SETS = 'E',
 346         ZFS_DELEG_CREATE = 'c',
 347         ZFS_DELEG_CREATE_SETS = 'C',
 348         ZFS_DELEG_NAMED_SET = 's',
 349         ZFS_DELEG_NAMED_SET_SETS = 'S'
 350 } zfs_deleg_who_type_t;
 351
 352 typedef enum {
 353         ZFS_DELEG_NONE = 0,
 354         ZFS_DELEG_PERM_LOCAL = 1,
 355         ZFS_DELEG_PERM_DESCENDENT = 2,
 356         ZFS_DELEG_PERM_LOCALDESCENDENT = 3,
 357         ZFS_DELEG_PERM_CREATE = 4
 358 } zfs_deleg_inherit_t;
 359
 360 #define ZFS_DELEG_PERM_UID      "uid"
 361 #define ZFS_DELEG_PERM_GID      "gid"
 362 #define ZFS_DELEG_PERM_GROUPS   "groups"
 363
 364 #define ZFS_MLSLABEL_DEFAULT    "none"
 365
 366 #define ZFS_SMB_ACL_SRC         "src"
 367 #define ZFS_SMB_ACL_TARGET      "target"
 368
 369 typedef enum {
 370         ZFS_CANMOUNT_OFF = 0,
 371         ZFS_CANMOUNT_ON = 1,
 372         ZFS_CANMOUNT_NOAUTO = 2
 373 } zfs_canmount_type_t;
 374
 375 typedef enum {
 376         ZFS_LOGBIAS_LATENCY = 0,
 377         ZFS_LOGBIAS_THROUGHPUT = 1
 378 } zfs_logbias_op_t;
 379
 380 typedef enum zfs_share_op {
 381         ZFS_SHARE_NFS = 0,
 382         ZFS_UNSHARE_NFS = 1,
 383         ZFS_SHARE_SMB = 2,
 384         ZFS_UNSHARE_SMB = 3
 385 } zfs_share_op_t;
 386
 387 typedef enum zfs_smb_acl_op {
 388         ZFS_SMB_ACL_ADD,
 389         ZFS_SMB_ACL_REMOVE,
 390         ZFS_SMB_ACL_RENAME,
 391         ZFS_SMB_ACL_PURGE
 392 } zfs_smb_acl_op_t;
 393
 394 typedef enum zfs_cache_type {
 395         ZFS_CACHE_NONE = 0,
 396         ZFS_CACHE_METADATA = 1,
 397         ZFS_CACHE_ALL = 2
 398 } zfs_cache_type_t;
 399
 400 typedef enum {
 401         ZFS_SYNC_STANDARD = 0,
 402         ZFS_SYNC_ALWAYS = 1,
 403         ZFS_SYNC_DISABLED = 2
 404 } zfs_sync_type_t;
 405
 406 typedef enum {
 407         ZFS_XATTR_OFF = 0,
 408         ZFS_XATTR_DIR = 1,
 409         ZFS_XATTR_SA = 2
 410 } zfs_xattr_type_t;
 411
 412 typedef enum {
 413         ZFS_DNSIZE_LEGACY = 0,
 414         ZFS_DNSIZE_AUTO = 1,
 415         ZFS_DNSIZE_1K = 1024,
 416         ZFS_DNSIZE_2K = 2048,
 417         ZFS_DNSIZE_4K = 4096,
 418         ZFS_DNSIZE_8K = 8192,
 419         ZFS_DNSIZE_16K = 16384
 420 } zfs_dnsize_type_t;
 421
 422 typedef enum {
 423         ZFS_REDUNDANT_METADATA_ALL,
 424         ZFS_REDUNDANT_METADATA_MOST
 425 } zfs_redundant_metadata_type_t;
 426
 427 typedef enum {
 428         ZFS_VOLMODE_DEFAULT = 0,
 429         ZFS_VOLMODE_GEOM = 1,
 430         ZFS_VOLMODE_DEV = 2,
 431         ZFS_VOLMODE_NONE = 3
 432 } zfs_volmode_t;
 433
 434 typedef enum zfs_keystatus {
 435         ZFS_KEYSTATUS_NONE = 0,
 436         ZFS_KEYSTATUS_UNAVAILABLE,
 437         ZFS_KEYSTATUS_AVAILABLE,
 438 } zfs_keystatus_t;
 439
 440 typedef enum zfs_keyformat {
 441         ZFS_KEYFORMAT_NONE = 0,
 442         ZFS_KEYFORMAT_RAW,
 443         ZFS_KEYFORMAT_HEX,
 444         ZFS_KEYFORMAT_PASSPHRASE,
 445         ZFS_KEYFORMAT_FORMATS
 446 } zfs_keyformat_t;
 447
 448 typedef enum zfs_key_location {
 449         ZFS_KEYLOCATION_NONE = 0,
 450         ZFS_KEYLOCATION_PROMPT,
 451         ZFS_KEYLOCATION_URI,
 452         ZFS_KEYLOCATION_LOCATIONS
 453 } zfs_keylocation_t;
 454
 455 #define DEFAULT_PBKDF2_ITERATIONS 350000
 456 #define MIN_PBKDF2_ITERATIONS 100000
 457
 458 /*
 459  * On-disk version number.
 460  */
 461 #define SPA_VERSION_1                   1ULL
 462 #define SPA_VERSION_2                   2ULL
 463 #define SPA_VERSION_3                   3ULL
 464 #define SPA_VERSION_4                   4ULL
 465 #define SPA_VERSION_5                   5ULL
 466 #define SPA_VERSION_6                   6ULL
 467 #define SPA_VERSION_7                   7ULL
 468 #define SPA_VERSION_8                   8ULL
 469 #define SPA_VERSION_9                   9ULL
 470 #define SPA_VERSION_10                  10ULL
 471 #define SPA_VERSION_11                  11ULL
 472 #define SPA_VERSION_12                  12ULL
 473 #define SPA_VERSION_13                  13ULL
 474 #define SPA_VERSION_14                  14ULL
 475 #define SPA_VERSION_15                  15ULL
 476 #define SPA_VERSION_16                  16ULL
 477 #define SPA_VERSION_17                  17ULL
 478 #define SPA_VERSION_18                  18ULL
 479 #define SPA_VERSION_19                  19ULL
 480 #define SPA_VERSION_20                  20ULL
 481 #define SPA_VERSION_21                  21ULL
 482 #define SPA_VERSION_22                  22ULL
 483 #define SPA_VERSION_23                  23ULL
 484 #define SPA_VERSION_24                  24ULL
 485 #define SPA_VERSION_25                  25ULL
 486 #define SPA_VERSION_26                  26ULL
 487 #define SPA_VERSION_27                  27ULL
 488 #define SPA_VERSION_28                  28ULL
 489 #define SPA_VERSION_5000                5000ULL
 490
 491 #define SPA_VERSION                     SPA_VERSION_5000
 492 #define SPA_VERSION_STRING              "5000"
 493
 494 /*
 495  * Symbolic names for the changes that caused a SPA_VERSION switch.
 496  * Used in the code when checking for presence or absence of a feature.
 497  * Feel free to define multiple symbolic names for each version if there
 498  * were multiple changes to on-disk structures during that version.
 499  *
 500  * NOTE: When checking the current SPA_VERSION in your code, be sure
 501  *       to use spa_version() since it reports the version of the
 502  *       last synced uberblock.  Checking the in-flight version can
 503  *       be dangerous in some cases.
 504  */
 505 #define SPA_VERSION_INITIAL             SPA_VERSION_1
 506 #define SPA_VERSION_DITTO_BLOCKS        SPA_VERSION_2
 507 #define SPA_VERSION_SPARES              SPA_VERSION_3
 508 #define SPA_VERSION_RAIDZ2              SPA_VERSION_3
 509 #define SPA_VERSION_BPOBJ_ACCOUNT       SPA_VERSION_3
 510 #define SPA_VERSION_RAIDZ_DEFLATE       SPA_VERSION_3
 511 #define SPA_VERSION_DNODE_BYTES         SPA_VERSION_3
 512 #define SPA_VERSION_ZPOOL_HISTORY       SPA_VERSION_4
 513 #define SPA_VERSION_GZIP_COMPRESSION    SPA_VERSION_5
 514 #define SPA_VERSION_BOOTFS              SPA_VERSION_6
 515 #define SPA_VERSION_SLOGS               SPA_VERSION_7
 516 #define SPA_VERSION_DELEGATED_PERMS     SPA_VERSION_8
 517 #define SPA_VERSION_FUID                SPA_VERSION_9
 518 #define SPA_VERSION_REFRESERVATION      SPA_VERSION_9
 519 #define SPA_VERSION_REFQUOTA            SPA_VERSION_9
 520 #define SPA_VERSION_UNIQUE_ACCURATE     SPA_VERSION_9
 521 #define SPA_VERSION_L2CACHE             SPA_VERSION_10
 522 #define SPA_VERSION_NEXT_CLONES         SPA_VERSION_11
 523 #define SPA_VERSION_ORIGIN              SPA_VERSION_11
 524 #define SPA_VERSION_DSL_SCRUB           SPA_VERSION_11
 525 #define SPA_VERSION_SNAP_PROPS          SPA_VERSION_12
 526 #define SPA_VERSION_USED_BREAKDOWN      SPA_VERSION_13
 527 #define SPA_VERSION_PASSTHROUGH_X       SPA_VERSION_14
 528 #define SPA_VERSION_USERSPACE           SPA_VERSION_15
 529 #define SPA_VERSION_STMF_PROP           SPA_VERSION_16
 530 #define SPA_VERSION_RAIDZ3              SPA_VERSION_17
 531 #define SPA_VERSION_USERREFS            SPA_VERSION_18
 532 #define SPA_VERSION_HOLES               SPA_VERSION_19
 533 #define SPA_VERSION_ZLE_COMPRESSION     SPA_VERSION_20
 534 #define SPA_VERSION_DEDUP               SPA_VERSION_21
 535 #define SPA_VERSION_RECVD_PROPS         SPA_VERSION_22
 536 #define SPA_VERSION_SLIM_ZIL            SPA_VERSION_23
 537 #define SPA_VERSION_SA                  SPA_VERSION_24
 538 #define SPA_VERSION_SCAN                SPA_VERSION_25
 539 #define SPA_VERSION_DIR_CLONES          SPA_VERSION_26
 540 #define SPA_VERSION_DEADLISTS           SPA_VERSION_26
 541 #define SPA_VERSION_FAST_SNAP           SPA_VERSION_27
 542 #define SPA_VERSION_MULTI_REPLACE       SPA_VERSION_28
 543 #define SPA_VERSION_BEFORE_FEATURES     SPA_VERSION_28
 544 #define SPA_VERSION_FEATURES            SPA_VERSION_5000
 545
 546 #define SPA_VERSION_IS_SUPPORTED(v) \
 547         (((v) >= SPA_VERSION_INITIAL && (v) <= SPA_VERSION_BEFORE_FEATURES) || \
 548         ((v) >= SPA_VERSION_FEATURES && (v) <= SPA_VERSION))
 549
 550 /*
 551  * ZPL version - rev'd whenever an incompatible on-disk format change
 552  * occurs.  This is independent of SPA/DMU/ZAP versioning.  You must
 553  * also update the version_table[] and help message in zfs_prop.c.
 554  */
 555 #define ZPL_VERSION_1                   1ULL
 556 #define ZPL_VERSION_2                   2ULL
 557 #define ZPL_VERSION_3                   3ULL
 558 #define ZPL_VERSION_4                   4ULL
 559 #define ZPL_VERSION_5                   5ULL
 560 #define ZPL_VERSION                     ZPL_VERSION_5
 561 #define ZPL_VERSION_STRING              "5"
 562
 563 #define ZPL_VERSION_INITIAL             ZPL_VERSION_1
 564 #define ZPL_VERSION_DIRENT_TYPE         ZPL_VERSION_2
 565 #define ZPL_VERSION_FUID                ZPL_VERSION_3
 566 #define ZPL_VERSION_NORMALIZATION       ZPL_VERSION_3
 567 #define ZPL_VERSION_SYSATTR             ZPL_VERSION_3
 568 #define ZPL_VERSION_USERSPACE           ZPL_VERSION_4
 569 #define ZPL_VERSION_SA                  ZPL_VERSION_5
 570
 571 /* Rewind policy information */
 572 #define ZPOOL_NO_REWIND         1  /* No policy - default behavior */
 573 #define ZPOOL_NEVER_REWIND      2  /* Do not search for best txg or rewind */
 574 #define ZPOOL_TRY_REWIND        4  /* Search for best txg, but do not rewind */
 575 #define ZPOOL_DO_REWIND         8  /* Rewind to best txg w/in deferred frees */
 576 #define ZPOOL_EXTREME_REWIND    16 /* Allow extreme measures to find best txg */
 577 #define ZPOOL_REWIND_MASK       28 /* All the possible rewind bits */
 578 #define ZPOOL_REWIND_POLICIES   31 /* All the possible policy bits */
 579
 580 typedef struct zpool_load_policy {
 581         uint32_t        zlp_rewind;     /* rewind policy requested */
 582         uint64_t        zlp_maxmeta;    /* max acceptable meta-data errors */
 583         uint64_t        zlp_maxdata;    /* max acceptable data errors */
 584         uint64_t        zlp_txg;        /* specific txg to load */
 585 } zpool_load_policy_t;
 586
 587 /*
 588  * The following are configuration names used in the nvlist describing a pool's
 589  * configuration.  New on-disk names should be prefixed with "<reverse-DNS>:"
 590  * (e.g. "org.open-zfs:") to avoid conflicting names being developed
 591  * independently.
 592  */
 593 #define ZPOOL_CONFIG_VERSION            "version"
 594 #define ZPOOL_CONFIG_POOL_NAME          "name"
 595 #define ZPOOL_CONFIG_POOL_STATE         "state"
 596 #define ZPOOL_CONFIG_POOL_TXG           "txg"
 597 #define ZPOOL_CONFIG_POOL_GUID          "pool_guid"
 598 #define ZPOOL_CONFIG_CREATE_TXG         "create_txg"
 599 #define ZPOOL_CONFIG_TOP_GUID           "top_guid"
 600 #define ZPOOL_CONFIG_VDEV_TREE          "vdev_tree"
 601 #define ZPOOL_CONFIG_TYPE               "type"
 602 #define ZPOOL_CONFIG_CHILDREN           "children"
 603 #define ZPOOL_CONFIG_ID                 "id"
 604 #define ZPOOL_CONFIG_GUID               "guid"
 605 #define ZPOOL_CONFIG_INDIRECT_OBJECT    "com.delphix:indirect_object"
 606 #define ZPOOL_CONFIG_INDIRECT_BIRTHS    "com.delphix:indirect_births"
 607 #define ZPOOL_CONFIG_PREV_INDIRECT_VDEV "com.delphix:prev_indirect_vdev"
 608 #define ZPOOL_CONFIG_PATH               "path"
 609 #define ZPOOL_CONFIG_DEVID              "devid"
 610 #define ZPOOL_CONFIG_METASLAB_ARRAY     "metaslab_array"
 611 #define ZPOOL_CONFIG_METASLAB_SHIFT     "metaslab_shift"
 612 #define ZPOOL_CONFIG_ASHIFT             "ashift"
 613 #define ZPOOL_CONFIG_ASIZE              "asize"
 614 #define ZPOOL_CONFIG_DTL                "DTL"
 615 #define ZPOOL_CONFIG_SCAN_STATS         "scan_stats"    /* not stored on disk */
 616 #define ZPOOL_CONFIG_REMOVAL_STATS      "removal_stats" /* not stored on disk */
 617 #define ZPOOL_CONFIG_CHECKPOINT_STATS   "checkpoint_stats" /* not on disk */
 618 #define ZPOOL_CONFIG_VDEV_STATS         "vdev_stats"    /* not stored on disk */
 619 #define ZPOOL_CONFIG_INDIRECT_SIZE      "indirect_size" /* not stored on disk */
 620
 621 /* container nvlist of extended stats */
 622 #define ZPOOL_CONFIG_VDEV_STATS_EX      "vdev_stats_ex"
 623
 624 /* Active queue read/write stats */
 625 #define ZPOOL_CONFIG_VDEV_SYNC_R_ACTIVE_QUEUE   "vdev_sync_r_active_queue"
 626 #define ZPOOL_CONFIG_VDEV_SYNC_W_ACTIVE_QUEUE   "vdev_sync_w_active_queue"
 627 #define ZPOOL_CONFIG_VDEV_ASYNC_R_ACTIVE_QUEUE  "vdev_async_r_active_queue"
 628 #define ZPOOL_CONFIG_VDEV_ASYNC_W_ACTIVE_QUEUE  "vdev_async_w_active_queue"
 629 #define ZPOOL_CONFIG_VDEV_SCRUB_ACTIVE_QUEUE    "vdev_async_scrub_active_queue"
 630 #define ZPOOL_CONFIG_VDEV_TRIM_ACTIVE_QUEUE     "vdev_async_trim_active_queue"
 631
 632 /* Queue sizes */
 633 #define ZPOOL_CONFIG_VDEV_SYNC_R_PEND_QUEUE     "vdev_sync_r_pend_queue"
 634 #define ZPOOL_CONFIG_VDEV_SYNC_W_PEND_QUEUE     "vdev_sync_w_pend_queue"
 635 #define ZPOOL_CONFIG_VDEV_ASYNC_R_PEND_QUEUE    "vdev_async_r_pend_queue"
 636 #define ZPOOL_CONFIG_VDEV_ASYNC_W_PEND_QUEUE    "vdev_async_w_pend_queue"
 637 #define ZPOOL_CONFIG_VDEV_SCRUB_PEND_QUEUE      "vdev_async_scrub_pend_queue"
 638 #define ZPOOL_CONFIG_VDEV_TRIM_PEND_QUEUE       "vdev_async_trim_pend_queue"
 639
 640 /* Latency read/write histogram stats */
 641 #define ZPOOL_CONFIG_VDEV_TOT_R_LAT_HISTO       "vdev_tot_r_lat_histo"
 642 #define ZPOOL_CONFIG_VDEV_TOT_W_LAT_HISTO       "vdev_tot_w_lat_histo"
 643 #define ZPOOL_CONFIG_VDEV_DISK_R_LAT_HISTO      "vdev_disk_r_lat_histo"
 644 #define ZPOOL_CONFIG_VDEV_DISK_W_LAT_HISTO      "vdev_disk_w_lat_histo"
 645 #define ZPOOL_CONFIG_VDEV_SYNC_R_LAT_HISTO      "vdev_sync_r_lat_histo"
 646 #define ZPOOL_CONFIG_VDEV_SYNC_W_LAT_HISTO      "vdev_sync_w_lat_histo"
 647 #define ZPOOL_CONFIG_VDEV_ASYNC_R_LAT_HISTO     "vdev_async_r_lat_histo"
 648 #define ZPOOL_CONFIG_VDEV_ASYNC_W_LAT_HISTO     "vdev_async_w_lat_histo"
 649 #define ZPOOL_CONFIG_VDEV_SCRUB_LAT_HISTO       "vdev_scrub_histo"
 650 #define ZPOOL_CONFIG_VDEV_TRIM_LAT_HISTO        "vdev_trim_histo"
 651
 652 /* Request size histograms */
 653 #define ZPOOL_CONFIG_VDEV_SYNC_IND_R_HISTO      "vdev_sync_ind_r_histo"
 654 #define ZPOOL_CONFIG_VDEV_SYNC_IND_W_HISTO      "vdev_sync_ind_w_histo"
 655 #define ZPOOL_CONFIG_VDEV_ASYNC_IND_R_HISTO     "vdev_async_ind_r_histo"
 656 #define ZPOOL_CONFIG_VDEV_ASYNC_IND_W_HISTO     "vdev_async_ind_w_histo"
 657 #define ZPOOL_CONFIG_VDEV_IND_SCRUB_HISTO       "vdev_ind_scrub_histo"
 658 #define ZPOOL_CONFIG_VDEV_IND_TRIM_HISTO        "vdev_ind_trim_histo"
 659 #define ZPOOL_CONFIG_VDEV_SYNC_AGG_R_HISTO      "vdev_sync_agg_r_histo"
 660 #define ZPOOL_CONFIG_VDEV_SYNC_AGG_W_HISTO      "vdev_sync_agg_w_histo"
 661 #define ZPOOL_CONFIG_VDEV_ASYNC_AGG_R_HISTO     "vdev_async_agg_r_histo"
 662 #define ZPOOL_CONFIG_VDEV_ASYNC_AGG_W_HISTO     "vdev_async_agg_w_histo"
 663 #define ZPOOL_CONFIG_VDEV_AGG_SCRUB_HISTO       "vdev_agg_scrub_histo"
 664 #define ZPOOL_CONFIG_VDEV_AGG_TRIM_HISTO        "vdev_agg_trim_histo"
 665
 666 /* Number of slow IOs */
 667 #define ZPOOL_CONFIG_VDEV_SLOW_IOS              "vdev_slow_ios"
 668
 669 /* vdev enclosure sysfs path */
 670 #define ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH        "vdev_enc_sysfs_path"
 671
 672 #define ZPOOL_CONFIG_WHOLE_DISK         "whole_disk"
 673 #define ZPOOL_CONFIG_ERRCOUNT           "error_count"
 674 #define ZPOOL_CONFIG_NOT_PRESENT        "not_present"
 675 #define ZPOOL_CONFIG_SPARES             "spares"
 676 #define ZPOOL_CONFIG_IS_SPARE           "is_spare"
 677 #define ZPOOL_CONFIG_NPARITY            "nparity"
 678 #define ZPOOL_CONFIG_HOSTID             "hostid"
 679 #define ZPOOL_CONFIG_HOSTNAME           "hostname"
 680 #define ZPOOL_CONFIG_LOADED_TIME        "initial_load_time"
 681 #define ZPOOL_CONFIG_UNSPARE            "unspare"
 682 #define ZPOOL_CONFIG_PHYS_PATH          "phys_path"
 683 #define ZPOOL_CONFIG_IS_LOG             "is_log"
 684 #define ZPOOL_CONFIG_L2CACHE            "l2cache"
 685 #define ZPOOL_CONFIG_HOLE_ARRAY         "hole_array"
 686 #define ZPOOL_CONFIG_VDEV_CHILDREN      "vdev_children"
 687 #define ZPOOL_CONFIG_IS_HOLE            "is_hole"
 688 #define ZPOOL_CONFIG_DDT_HISTOGRAM      "ddt_histogram"
 689 #define ZPOOL_CONFIG_DDT_OBJ_STATS      "ddt_object_stats"
 690 #define ZPOOL_CONFIG_DDT_STATS          "ddt_stats"
 691 #define ZPOOL_CONFIG_SPLIT              "splitcfg"
 692 #define ZPOOL_CONFIG_ORIG_GUID          "orig_guid"
 693 #define ZPOOL_CONFIG_SPLIT_GUID         "split_guid"
 694 #define ZPOOL_CONFIG_SPLIT_LIST         "guid_list"
 695 #define ZPOOL_CONFIG_REMOVING           "removing"
 696 #define ZPOOL_CONFIG_RESILVER_TXG       "resilver_txg"
 697 #define ZPOOL_CONFIG_COMMENT            "comment"
 698 #define ZPOOL_CONFIG_SUSPENDED          "suspended"     /* not stored on disk */
 699 #define ZPOOL_CONFIG_SUSPENDED_REASON   "suspended_reason"      /* not stored */
 700 #define ZPOOL_CONFIG_TIMESTAMP          "timestamp"     /* not stored on disk */
 701 #define ZPOOL_CONFIG_BOOTFS             "bootfs"        /* not stored on disk */
 702 #define ZPOOL_CONFIG_MISSING_DEVICES    "missing_vdevs" /* not stored on disk */
 703 #define ZPOOL_CONFIG_LOAD_INFO          "load_info"     /* not stored on disk */
 704 #define ZPOOL_CONFIG_REWIND_INFO        "rewind_info"   /* not stored on disk */
 705 #define ZPOOL_CONFIG_UNSUP_FEAT         "unsup_feat"    /* not stored on disk */
 706 #define ZPOOL_CONFIG_ENABLED_FEAT       "enabled_feat"  /* not stored on disk */
 707 #define ZPOOL_CONFIG_CAN_RDONLY         "can_rdonly"    /* not stored on disk */
 708 #define ZPOOL_CONFIG_FEATURES_FOR_READ  "features_for_read"
 709 #define ZPOOL_CONFIG_FEATURE_STATS      "feature_stats" /* not stored on disk */
 710 #define ZPOOL_CONFIG_ERRATA             "errata"        /* not stored on disk */
 711 #define ZPOOL_CONFIG_VDEV_TOP_ZAP       "com.delphix:vdev_zap_top"
 712 #define ZPOOL_CONFIG_VDEV_LEAF_ZAP      "com.delphix:vdev_zap_leaf"
 713 #define ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS  "com.delphix:has_per_vdev_zaps"
 714 #define ZPOOL_CONFIG_RESILVER_DEFER     "com.datto:resilver_defer"
 715 #define ZPOOL_CONFIG_CACHEFILE          "cachefile"     /* not stored on disk */
 716 #define ZPOOL_CONFIG_MMP_STATE          "mmp_state"     /* not stored on disk */
 717 #define ZPOOL_CONFIG_MMP_TXG            "mmp_txg"       /* not stored on disk */
 718 #define ZPOOL_CONFIG_MMP_SEQ            "mmp_seq"       /* not stored on disk */
 719 #define ZPOOL_CONFIG_MMP_HOSTNAME       "mmp_hostname"  /* not stored on disk */
 720 #define ZPOOL_CONFIG_MMP_HOSTID         "mmp_hostid"    /* not stored on disk */
 721 #define ZPOOL_CONFIG_ALLOCATION_BIAS    "alloc_bias"    /* not stored on disk */
 722 #define ZPOOL_CONFIG_EXPANSION_TIME     "expansion_time"        /* not stored */
 723
 724 /*
 725  * The persistent vdev state is stored as separate values rather than a single
 726  * 'vdev_state' entry.  This is because a device can be in multiple states, such
 727  * as offline and degraded.
 728  */
 729 #define ZPOOL_CONFIG_OFFLINE            "offline"
 730 #define ZPOOL_CONFIG_FAULTED            "faulted"
 731 #define ZPOOL_CONFIG_DEGRADED           "degraded"
 732 #define ZPOOL_CONFIG_REMOVED            "removed"
 733 #define ZPOOL_CONFIG_FRU                "fru"
 734 #define ZPOOL_CONFIG_AUX_STATE          "aux_state"
 735
 736 /* Pool load policy parameters */
 737 #define ZPOOL_LOAD_POLICY               "load-policy"
 738 #define ZPOOL_LOAD_REWIND_POLICY        "load-rewind-policy"
 739 #define ZPOOL_LOAD_REQUEST_TXG          "load-request-txg"
 740 #define ZPOOL_LOAD_META_THRESH          "load-meta-thresh"
 741 #define ZPOOL_LOAD_DATA_THRESH          "load-data-thresh"
 742
 743 /* Rewind data discovered */
 744 #define ZPOOL_CONFIG_LOAD_TIME          "rewind_txg_ts"
 745 #define ZPOOL_CONFIG_LOAD_DATA_ERRORS   "verify_data_errors"
 746 #define ZPOOL_CONFIG_REWIND_TIME        "seconds_of_rewind"
 747
 748 #define VDEV_TYPE_ROOT                  "root"
 749 #define VDEV_TYPE_MIRROR                "mirror"
 750 #define VDEV_TYPE_REPLACING             "replacing"
 751 #define VDEV_TYPE_RAIDZ                 "raidz"
 752 #define VDEV_TYPE_DISK                  "disk"
 753 #define VDEV_TYPE_FILE                  "file"
 754 #define VDEV_TYPE_MISSING               "missing"
 755 #define VDEV_TYPE_HOLE                  "hole"
 756 #define VDEV_TYPE_SPARE                 "spare"
 757 #define VDEV_TYPE_LOG                   "log"
 758 #define VDEV_TYPE_L2CACHE               "l2cache"
 759 #define VDEV_TYPE_INDIRECT              "indirect"
 760
 761 /* VDEV_TOP_ZAP_* are used in top-level vdev ZAP objects. */
 762 #define VDEV_TOP_ZAP_INDIRECT_OBSOLETE_SM \
 763         "com.delphix:indirect_obsolete_sm"
 764 #define VDEV_TOP_ZAP_OBSOLETE_COUNTS_ARE_PRECISE \
 765         "com.delphix:obsolete_counts_are_precise"
 766 #define VDEV_TOP_ZAP_POOL_CHECKPOINT_SM \
 767         "com.delphix:pool_checkpoint_sm"
 768
 769 #define VDEV_TOP_ZAP_ALLOCATION_BIAS \
 770         "org.zfsonlinux:allocation_bias"
 771
 772 /* vdev metaslab allocation bias */
 773 #define VDEV_ALLOC_BIAS_LOG             "log"
 774 #define VDEV_ALLOC_BIAS_SPECIAL         "special"
 775 #define VDEV_ALLOC_BIAS_DEDUP           "dedup"
 776
 777 /* vdev initialize state */
 778 #define VDEV_LEAF_ZAP_INITIALIZE_LAST_OFFSET    \
 779         "com.delphix:next_offset_to_initialize"
 780 #define VDEV_LEAF_ZAP_INITIALIZE_STATE  \
 781         "com.delphix:vdev_initialize_state"
 782 #define VDEV_LEAF_ZAP_INITIALIZE_ACTION_TIME    \
 783         "com.delphix:vdev_initialize_action_time"
 784
 785 /* vdev TRIM state */
 786 #define VDEV_LEAF_ZAP_TRIM_LAST_OFFSET  \
 787         "org.zfsonlinux:next_offset_to_trim"
 788 #define VDEV_LEAF_ZAP_TRIM_STATE        \
 789         "org.zfsonlinux:vdev_trim_state"
 790 #define VDEV_LEAF_ZAP_TRIM_ACTION_TIME  \
 791         "org.zfsonlinux:vdev_trim_action_time"
 792 #define VDEV_LEAF_ZAP_TRIM_RATE         \
 793         "org.zfsonlinux:vdev_trim_rate"
 794 #define VDEV_LEAF_ZAP_TRIM_PARTIAL      \
 795         "org.zfsonlinux:vdev_trim_partial"
 796 #define VDEV_LEAF_ZAP_TRIM_SECURE       \
 797         "org.zfsonlinux:vdev_trim_secure"
 798
 799 /*
 800  * This is needed in userland to report the minimum necessary device size.
 801  */
 802 #define SPA_MINDEVSIZE          (64ULL << 20)
 803
 804 /*
 805  * Set if the fragmentation has not yet been calculated. This can happen
 806  * because the space maps have not been upgraded or the histogram feature
 807  * is not enabled.
 808  */
 809 #define ZFS_FRAG_INVALID        UINT64_MAX
 810
 811 /*
 812  * The location of the pool configuration repository, shared between kernel and
 813  * userland.
 814  */
 815 #define ZPOOL_CACHE             "/etc/zfs/zpool.cache"
 816
 817 /*
 818  * vdev states are ordered from least to most healthy.
 819  * A vdev that's CANT_OPEN or below is considered unusable.
 820  */
 821 typedef enum vdev_state {
 822         VDEV_STATE_UNKNOWN = 0, /* Uninitialized vdev                   */
 823         VDEV_STATE_CLOSED,      /* Not currently open                   */
 824         VDEV_STATE_OFFLINE,     /* Not allowed to open                  */
 825         VDEV_STATE_REMOVED,     /* Explicitly removed from system       */
 826         VDEV_STATE_CANT_OPEN,   /* Tried to open, but failed            */
 827         VDEV_STATE_FAULTED,     /* External request to fault device     */
 828         VDEV_STATE_DEGRADED,    /* Replicated vdev with unhealthy kids  */
 829         VDEV_STATE_HEALTHY      /* Presumed good                        */
 830 } vdev_state_t;
 831
 832 #define VDEV_STATE_ONLINE       VDEV_STATE_HEALTHY
 833
 834 /*
 835  * vdev aux states.  When a vdev is in the CANT_OPEN state, the aux field
 836  * of the vdev stats structure uses these constants to distinguish why.
 837  */
 838 typedef enum vdev_aux {
 839         VDEV_AUX_NONE,          /* no error                             */
 840         VDEV_AUX_OPEN_FAILED,   /* ldi_open_*() or vn_open() failed     */
 841         VDEV_AUX_CORRUPT_DATA,  /* bad label or disk contents           */
 842         VDEV_AUX_NO_REPLICAS,   /* insufficient number of replicas      */
 843         VDEV_AUX_BAD_GUID_SUM,  /* vdev guid sum doesn't match          */
 844         VDEV_AUX_TOO_SMALL,     /* vdev size is too small               */
 845         VDEV_AUX_BAD_LABEL,     /* the label is OK but invalid          */
 846         VDEV_AUX_VERSION_NEWER, /* on-disk version is too new           */
 847         VDEV_AUX_VERSION_OLDER, /* on-disk version is too old           */
 848         VDEV_AUX_UNSUP_FEAT,    /* unsupported features                 */
 849         VDEV_AUX_SPARED,        /* hot spare used in another pool       */
 850         VDEV_AUX_ERR_EXCEEDED,  /* too many errors                      */
 851         VDEV_AUX_IO_FAILURE,    /* experienced I/O failure              */
 852         VDEV_AUX_BAD_LOG,       /* cannot read log chain(s)             */
 853         VDEV_AUX_EXTERNAL,      /* external diagnosis or forced fault   */
 854         VDEV_AUX_SPLIT_POOL,    /* vdev was split off into another pool */
 855         VDEV_AUX_BAD_ASHIFT,    /* vdev ashift is invalid               */
 856         VDEV_AUX_EXTERNAL_PERSIST,      /* persistent forced fault      */
 857         VDEV_AUX_ACTIVE,        /* vdev active on a different host      */
 858         VDEV_AUX_CHILDREN_OFFLINE, /* all children are offline          */
 859 } vdev_aux_t;
 860
 861 /*
 862  * pool state.  The following states are written to disk as part of the normal
 863  * SPA lifecycle: ACTIVE, EXPORTED, DESTROYED, SPARE, L2CACHE.  The remaining
 864  * states are software abstractions used at various levels to communicate
 865  * pool state.
 866  */
 867 typedef enum pool_state {
 868         POOL_STATE_ACTIVE = 0,          /* In active use                */
 869         POOL_STATE_EXPORTED,            /* Explicitly exported          */
 870         POOL_STATE_DESTROYED,           /* Explicitly destroyed         */
 871         POOL_STATE_SPARE,               /* Reserved for hot spare use   */
 872         POOL_STATE_L2CACHE,             /* Level 2 ARC device           */
 873         POOL_STATE_UNINITIALIZED,       /* Internal spa_t state         */
 874         POOL_STATE_UNAVAIL,             /* Internal libzfs state        */
 875         POOL_STATE_POTENTIALLY_ACTIVE   /* Internal libzfs state        */
 876 } pool_state_t;
 877
 878 /*
 879  * mmp state. The following states provide additional detail describing
 880  * why a pool couldn't be safely imported.
 881  */
 882 typedef enum mmp_state {
 883         MMP_STATE_ACTIVE = 0,           /* In active use                */
 884         MMP_STATE_INACTIVE,             /* Inactive and safe to import  */
 885         MMP_STATE_NO_HOSTID             /* System hostid is not set     */
 886 } mmp_state_t;
 887
 888 /*
 889  * Scan Functions.
 890  */
 891 typedef enum pool_scan_func {
 892         POOL_SCAN_NONE,
 893         POOL_SCAN_SCRUB,
 894         POOL_SCAN_RESILVER,
 895         POOL_SCAN_FUNCS
 896 } pool_scan_func_t;
 897
 898 /*
 899  * Used to control scrub pause and resume.
 900  */
 901 typedef enum pool_scrub_cmd {
 902         POOL_SCRUB_NORMAL = 0,
 903         POOL_SCRUB_PAUSE,
 904         POOL_SCRUB_FLAGS_END
 905 } pool_scrub_cmd_t;
 906
 907 typedef enum {
 908         CS_NONE,
 909         CS_CHECKPOINT_EXISTS,
 910         CS_CHECKPOINT_DISCARDING,
 911         CS_NUM_STATES
 912 } checkpoint_state_t;
 913
 914 typedef struct pool_checkpoint_stat {
 915         uint64_t pcs_state;             /* checkpoint_state_t */
 916         uint64_t pcs_start_time;        /* time checkpoint/discard started */
 917         uint64_t pcs_space;             /* checkpointed space */
 918 } pool_checkpoint_stat_t;
 919
 920 /*
 921  * ZIO types.  Needed to interpret vdev statistics below.
 922  */
 923 typedef enum zio_type {
 924         ZIO_TYPE_NULL = 0,
 925         ZIO_TYPE_READ,
 926         ZIO_TYPE_WRITE,
 927         ZIO_TYPE_FREE,
 928         ZIO_TYPE_CLAIM,
 929         ZIO_TYPE_IOCTL,
 930         ZIO_TYPE_TRIM,
 931         ZIO_TYPES
 932 } zio_type_t;
 933
 934 /*
 935  * Pool statistics.  Note: all fields should be 64-bit because this
 936  * is passed between kernel and userland as an nvlist uint64 array.
 937  */
 938 typedef struct pool_scan_stat {
 939         /* values stored on disk */
 940         uint64_t        pss_func;       /* pool_scan_func_t */
 941         uint64_t        pss_state;      /* dsl_scan_state_t */
 942         uint64_t        pss_start_time; /* scan start time */
 943         uint64_t        pss_end_time;   /* scan end time */
 944         uint64_t        pss_to_examine; /* total bytes to scan */
 945         uint64_t        pss_examined;   /* total bytes located by scanner */
 946         uint64_t        pss_to_process; /* total bytes to process */
 947         uint64_t        pss_processed;  /* total processed bytes */
 948         uint64_t        pss_errors;     /* scan errors  */
 949
 950         /* values not stored on disk */
 951         uint64_t        pss_pass_exam; /* examined bytes per scan pass */
 952         uint64_t        pss_pass_start; /* start time of a scan pass */
 953         uint64_t        pss_pass_scrub_pause; /* pause time of a scurb pass */
 954         /* cumulative time scrub spent paused, needed for rate calculation */
 955         uint64_t        pss_pass_scrub_spent_paused;
 956         uint64_t        pss_pass_issued; /* issued bytes per scan pass */
 957         uint64_t        pss_issued;     /* total bytes checked by scanner */
 958 } pool_scan_stat_t;
 959
 960 typedef struct pool_removal_stat {
 961         uint64_t prs_state; /* dsl_scan_state_t */
 962         uint64_t prs_removing_vdev;
 963         uint64_t prs_start_time;
 964         uint64_t prs_end_time;
 965         uint64_t prs_to_copy; /* bytes that need to be copied */
 966         uint64_t prs_copied; /* bytes copied so far */
 967         /*
 968          * bytes of memory used for indirect mappings.
 969          * This includes all removed vdevs.
 970          */
 971         uint64_t prs_mapping_memory;
 972 } pool_removal_stat_t;
 973
 974 typedef enum dsl_scan_state {
 975         DSS_NONE,
 976         DSS_SCANNING,
 977         DSS_FINISHED,
 978         DSS_CANCELED,
 979         DSS_NUM_STATES
 980 } dsl_scan_state_t;
 981
 982 /*
 983  * Errata described by http://zfsonlinux.org/msg/ZFS-8000-ER.  The ordering
 984  * of this enum must be maintained to ensure the errata identifiers map to
 985  * the correct documentation.  New errata may only be appended to the list
 986  * and must contain corresponding documentation at the above link.
 987  */
 988 typedef enum zpool_errata {
 989         ZPOOL_ERRATA_NONE,
 990         ZPOOL_ERRATA_ZOL_2094_SCRUB,
 991         ZPOOL_ERRATA_ZOL_2094_ASYNC_DESTROY,
 992         ZPOOL_ERRATA_ZOL_6845_ENCRYPTION,
 993         ZPOOL_ERRATA_ZOL_8308_ENCRYPTION,
 994 } zpool_errata_t;
 995
 996 /*
 997  * Vdev statistics.  Note: all fields should be 64-bit because this
 998  * is passed between kernel and user land as an nvlist uint64 array.
 999  *
1000  * The vs_ops[] and vs_bytes[] arrays must always be an array size of 6 in
1001  * order to keep subsequent members at their known fixed offsets.  When
1002  * adding a new field it must be added to the end the structure.
1003  */
1004 #define VS_ZIO_TYPES    6
1005
1006 typedef struct vdev_stat {
1007         hrtime_t        vs_timestamp;           /* time since vdev load */
1008         uint64_t        vs_state;               /* vdev state           */
1009         uint64_t        vs_aux;                 /* see vdev_aux_t       */
1010         uint64_t        vs_alloc;               /* space allocated      */
1011         uint64_t        vs_space;               /* total capacity       */
1012         uint64_t        vs_dspace;              /* deflated capacity    */
1013         uint64_t        vs_rsize;               /* replaceable dev size */
1014         uint64_t        vs_esize;               /* expandable dev size */
1015         uint64_t        vs_ops[VS_ZIO_TYPES];   /* operation count      */
1016         uint64_t        vs_bytes[VS_ZIO_TYPES]; /* bytes read/written   */
1017         uint64_t        vs_read_errors;         /* read errors          */
1018         uint64_t        vs_write_errors;        /* write errors         */
1019         uint64_t        vs_checksum_errors;     /* checksum errors      */
1020         uint64_t        vs_initialize_errors;   /* initializing errors  */
1021         uint64_t        vs_self_healed;         /* self-healed bytes    */
1022         uint64_t        vs_scan_removing;       /* removing?    */
1023         uint64_t        vs_scan_processed;      /* scan processed bytes */
1024         uint64_t        vs_fragmentation;       /* device fragmentation */
1025         uint64_t        vs_initialize_bytes_done; /* bytes initialized */
1026         uint64_t        vs_initialize_bytes_est; /* total bytes to initialize */
1027         uint64_t        vs_initialize_state;    /* vdev_initialzing_state_t */
1028         uint64_t        vs_initialize_action_time; /* time_t */
1029         uint64_t        vs_checkpoint_space;    /* checkpoint-consumed space */
1030         uint64_t        vs_resilver_deferred;   /* resilver deferred    */
1031         uint64_t        vs_slow_ios;            /* slow IOs */
1032         uint64_t        vs_trim_errors;         /* trimming errors      */
1033         uint64_t        vs_trim_notsup;         /* supported by device */
1034         uint64_t        vs_trim_bytes_done;     /* bytes trimmed */
1035         uint64_t        vs_trim_bytes_est;      /* total bytes to trim */
1036         uint64_t        vs_trim_state;          /* vdev_trim_state_t */
1037         uint64_t        vs_trim_action_time;    /* time_t */
1038 } vdev_stat_t;
1039
1040 /*
1041  * Extended stats
1042  *
1043  * These are stats which aren't included in the original iostat output.  For
1044  * convenience, they are grouped together in vdev_stat_ex, although each stat
1045  * is individually exported as an nvlist.
1046  */
1047 typedef struct vdev_stat_ex {
1048         /* Number of ZIOs issued to disk and waiting to finish */
1049         uint64_t vsx_active_queue[ZIO_PRIORITY_NUM_QUEUEABLE];
1050
1051         /* Number of ZIOs pending to be issued to disk */
1052         uint64_t vsx_pend_queue[ZIO_PRIORITY_NUM_QUEUEABLE];
1053
1054         /*
1055          * Below are the histograms for various latencies. Buckets are in
1056          * units of nanoseconds.
1057          */
1058
1059         /*
1060          * 2^37 nanoseconds = 134s. Timeouts will probably start kicking in
1061          * before this.
1062          */
1063 #define VDEV_L_HISTO_BUCKETS 37         /* Latency histo buckets */
1064 #define VDEV_RQ_HISTO_BUCKETS 25        /* Request size histo buckets */
1065
1066         /* Amount of time in ZIO queue (ns) */
1067         uint64_t vsx_queue_histo[ZIO_PRIORITY_NUM_QUEUEABLE]
1068             [VDEV_L_HISTO_BUCKETS];
1069
1070         /* Total ZIO latency (ns).  Includes queuing and disk access time */
1071         uint64_t vsx_total_histo[ZIO_TYPES][VDEV_L_HISTO_BUCKETS];
1072
1073         /* Amount of time to read/write the disk (ns) */
1074         uint64_t vsx_disk_histo[ZIO_TYPES][VDEV_L_HISTO_BUCKETS];
1075
1076         /* "lookup the bucket for a value" histogram macros */
1077 #define HISTO(val, buckets) (val != 0 ? MIN(highbit64(val) - 1, \
1078             buckets - 1) : 0)
1079 #define L_HISTO(a) HISTO(a, VDEV_L_HISTO_BUCKETS)
1080 #define RQ_HISTO(a) HISTO(a, VDEV_RQ_HISTO_BUCKETS)
1081
1082         /* Physical IO histogram */
1083         uint64_t vsx_ind_histo[ZIO_PRIORITY_NUM_QUEUEABLE]
1084             [VDEV_RQ_HISTO_BUCKETS];
1085
1086         /* Delegated (aggregated) physical IO histogram */
1087         uint64_t vsx_agg_histo[ZIO_PRIORITY_NUM_QUEUEABLE]
1088             [VDEV_RQ_HISTO_BUCKETS];
1089
1090 } vdev_stat_ex_t;
1091
1092 /*
1093  * Initialize functions.
1094  */
1095 typedef enum pool_initialize_func {
1096         POOL_INITIALIZE_START,
1097         POOL_INITIALIZE_CANCEL,
1098         POOL_INITIALIZE_SUSPEND,
1099         POOL_INITIALIZE_FUNCS
1100 } pool_initialize_func_t;
1101
1102 /*
1103  * TRIM functions.
1104  */
1105 typedef enum pool_trim_func {
1106         POOL_TRIM_START,
1107         POOL_TRIM_CANCEL,
1108         POOL_TRIM_SUSPEND,
1109         POOL_TRIM_FUNCS
1110 } pool_trim_func_t;
1111
1112 /*
1113  * DDT statistics.  Note: all fields should be 64-bit because this
1114  * is passed between kernel and userland as an nvlist uint64 array.
1115  */
1116 typedef struct ddt_object {
1117         uint64_t        ddo_count;      /* number of elements in ddt    */
1118         uint64_t        ddo_dspace;     /* size of ddt on disk          */
1119         uint64_t        ddo_mspace;     /* size of ddt in-core          */
1120 } ddt_object_t;
1121
1122 typedef struct ddt_stat {
1123         uint64_t        dds_blocks;     /* blocks                       */
1124         uint64_t        dds_lsize;      /* logical size                 */
1125         uint64_t        dds_psize;      /* physical size                */
1126         uint64_t        dds_dsize;      /* deflated allocated size      */
1127         uint64_t        dds_ref_blocks; /* referenced blocks            */
1128         uint64_t        dds_ref_lsize;  /* referenced lsize * refcnt    */
1129         uint64_t        dds_ref_psize;  /* referenced psize * refcnt    */
1130         uint64_t        dds_ref_dsize;  /* referenced dsize * refcnt    */
1131 } ddt_stat_t;
1132
1133 typedef struct ddt_histogram {
1134         ddt_stat_t      ddh_stat[64];   /* power-of-two histogram buckets */
1135 } ddt_histogram_t;
1136
1137 #define ZVOL_DRIVER     "zvol"
1138 #define ZFS_DRIVER      "zfs"
1139 #define ZFS_DEV         "/dev/zfs"
1140 #define ZFS_SHARETAB    "/etc/dfs/sharetab"
1141
1142 #define ZFS_SUPER_MAGIC 0x2fc12fc1
1143
1144 /* general zvol path */
1145 #define ZVOL_DIR        "/dev"
1146
1147 #define ZVOL_MAJOR              230
1148 #define ZVOL_MINOR_BITS         4
1149 #define ZVOL_MINOR_MASK         ((1U << ZVOL_MINOR_BITS) - 1)
1150 #define ZVOL_MINORS             (1 << 4)
1151 #define ZVOL_DEV_NAME           "zd"
1152
1153 #define ZVOL_PROP_NAME          "name"
1154 #define ZVOL_DEFAULT_BLOCKSIZE  8192
1155
1156 typedef enum {
1157         VDEV_INITIALIZE_NONE,
1158         VDEV_INITIALIZE_ACTIVE,
1159         VDEV_INITIALIZE_CANCELED,
1160         VDEV_INITIALIZE_SUSPENDED,
1161         VDEV_INITIALIZE_COMPLETE
1162 } vdev_initializing_state_t;
1163
1164 typedef enum {
1165         VDEV_TRIM_NONE,
1166         VDEV_TRIM_ACTIVE,
1167         VDEV_TRIM_CANCELED,
1168         VDEV_TRIM_SUSPENDED,
1169         VDEV_TRIM_COMPLETE,
1170 } vdev_trim_state_t;
1171
1172 /*
1173  * nvlist name constants. Facilitate restricting snapshot iteration range for
1174  * the "list next snapshot" ioctl
1175  */
1176 #define SNAP_ITER_MIN_TXG       "snap_iter_min_txg"
1177 #define SNAP_ITER_MAX_TXG       "snap_iter_max_txg"
1178
1179 /*
1180  * /dev/zfs ioctl numbers.
1181  *
1182  * These numbers cannot change over time. New ioctl numbers must be appended.
1183  */
1184 typedef enum zfs_ioc {
1185         /*
1186          * illumos - 81/128 numbers reserved.
1187          */
1188         ZFS_IOC_FIRST = ('Z' << 8),
1189         ZFS_IOC = ZFS_IOC_FIRST,
1190         ZFS_IOC_POOL_CREATE = ZFS_IOC_FIRST,    /* 0x5a00 */
1191         ZFS_IOC_POOL_DESTROY,                   /* 0x5a01 */
1192         ZFS_IOC_POOL_IMPORT,                    /* 0x5a02 */
1193         ZFS_IOC_POOL_EXPORT,                    /* 0x5a03 */
1194         ZFS_IOC_POOL_CONFIGS,                   /* 0x5a04 */
1195         ZFS_IOC_POOL_STATS,                     /* 0x5a05 */
1196         ZFS_IOC_POOL_TRYIMPORT,                 /* 0x5a06 */
1197         ZFS_IOC_POOL_SCAN,                      /* 0x5a07 */
1198         ZFS_IOC_POOL_FREEZE,                    /* 0x5a08 */
1199         ZFS_IOC_POOL_UPGRADE,                   /* 0x5a09 */
1200         ZFS_IOC_POOL_GET_HISTORY,               /* 0x5a0a */
1201         ZFS_IOC_VDEV_ADD,                       /* 0x5a0b */
1202         ZFS_IOC_VDEV_REMOVE,                    /* 0x5a0c */
1203         ZFS_IOC_VDEV_SET_STATE,                 /* 0x5a0d */
1204         ZFS_IOC_VDEV_ATTACH,                    /* 0x5a0e */
1205         ZFS_IOC_VDEV_DETACH,                    /* 0x5a0f */
1206         ZFS_IOC_VDEV_SETPATH,                   /* 0x5a10 */
1207         ZFS_IOC_VDEV_SETFRU,                    /* 0x5a11 */
1208         ZFS_IOC_OBJSET_STATS,                   /* 0x5a12 */
1209         ZFS_IOC_OBJSET_ZPLPROPS,                /* 0x5a13 */
1210         ZFS_IOC_DATASET_LIST_NEXT,              /* 0x5a14 */
1211         ZFS_IOC_SNAPSHOT_LIST_NEXT,             /* 0x5a15 */
1212         ZFS_IOC_SET_PROP,                       /* 0x5a16 */
1213         ZFS_IOC_CREATE,                         /* 0x5a17 */
1214         ZFS_IOC_DESTROY,                        /* 0x5a18 */
1215         ZFS_IOC_ROLLBACK,                       /* 0x5a19 */
1216         ZFS_IOC_RENAME,                         /* 0x5a1a */
1217         ZFS_IOC_RECV,                           /* 0x5a1b */
1218         ZFS_IOC_SEND,                           /* 0x5a1c */
1219         ZFS_IOC_INJECT_FAULT,                   /* 0x5a1d */
1220         ZFS_IOC_CLEAR_FAULT,                    /* 0x5a1e */
1221         ZFS_IOC_INJECT_LIST_NEXT,               /* 0x5a1f */
1222         ZFS_IOC_ERROR_LOG,                      /* 0x5a20 */
1223         ZFS_IOC_CLEAR,                          /* 0x5a21 */
1224         ZFS_IOC_PROMOTE,                        /* 0x5a22 */
1225         ZFS_IOC_SNAPSHOT,                       /* 0x5a23 */
1226         ZFS_IOC_DSOBJ_TO_DSNAME,                /* 0x5a24 */
1227         ZFS_IOC_OBJ_TO_PATH,                    /* 0x5a25 */
1228         ZFS_IOC_POOL_SET_PROPS,                 /* 0x5a26 */
1229         ZFS_IOC_POOL_GET_PROPS,                 /* 0x5a27 */
1230         ZFS_IOC_SET_FSACL,                      /* 0x5a28 */
1231         ZFS_IOC_GET_FSACL,                      /* 0x5a29 */
1232         ZFS_IOC_SHARE,                          /* 0x5a2a */
1233         ZFS_IOC_INHERIT_PROP,                   /* 0x5a2b */
1234         ZFS_IOC_SMB_ACL,                        /* 0x5a2c */
1235         ZFS_IOC_USERSPACE_ONE,                  /* 0x5a2d */
1236         ZFS_IOC_USERSPACE_MANY,                 /* 0x5a2e */
1237         ZFS_IOC_USERSPACE_UPGRADE,              /* 0x5a2f */
1238         ZFS_IOC_HOLD,                           /* 0x5a30 */
1239         ZFS_IOC_RELEASE,                        /* 0x5a31 */
1240         ZFS_IOC_GET_HOLDS,                      /* 0x5a32 */
1241         ZFS_IOC_OBJSET_RECVD_PROPS,             /* 0x5a33 */
1242         ZFS_IOC_VDEV_SPLIT,                     /* 0x5a34 */
1243         ZFS_IOC_NEXT_OBJ,                       /* 0x5a35 */
1244         ZFS_IOC_DIFF,                           /* 0x5a36 */
1245         ZFS_IOC_TMP_SNAPSHOT,                   /* 0x5a37 */
1246         ZFS_IOC_OBJ_TO_STATS,                   /* 0x5a38 */
1247         ZFS_IOC_SPACE_WRITTEN,                  /* 0x5a39 */
1248         ZFS_IOC_SPACE_SNAPS,                    /* 0x5a3a */
1249         ZFS_IOC_DESTROY_SNAPS,                  /* 0x5a3b */
1250         ZFS_IOC_POOL_REGUID,                    /* 0x5a3c */
1251         ZFS_IOC_POOL_REOPEN,                    /* 0x5a3d */
1252         ZFS_IOC_SEND_PROGRESS,                  /* 0x5a3e */
1253         ZFS_IOC_LOG_HISTORY,                    /* 0x5a3f */
1254         ZFS_IOC_SEND_NEW,                       /* 0x5a40 */
1255         ZFS_IOC_SEND_SPACE,                     /* 0x5a41 */
1256         ZFS_IOC_CLONE,                          /* 0x5a42 */
1257         ZFS_IOC_BOOKMARK,                       /* 0x5a43 */
1258         ZFS_IOC_GET_BOOKMARKS,                  /* 0x5a44 */
1259         ZFS_IOC_DESTROY_BOOKMARKS,              /* 0x5a45 */
1260         ZFS_IOC_RECV_NEW,                       /* 0x5a46 */
1261         ZFS_IOC_POOL_SYNC,                      /* 0x5a47 */
1262         ZFS_IOC_CHANNEL_PROGRAM,                /* 0x5a48 */
1263         ZFS_IOC_LOAD_KEY,                       /* 0x5a49 */
1264         ZFS_IOC_UNLOAD_KEY,                     /* 0x5a4a */
1265         ZFS_IOC_CHANGE_KEY,                     /* 0x5a4b */
1266         ZFS_IOC_REMAP,                          /* 0x5a4c */
1267         ZFS_IOC_POOL_CHECKPOINT,                /* 0x5a4d */
1268         ZFS_IOC_POOL_DISCARD_CHECKPOINT,        /* 0x5a4e */
1269         ZFS_IOC_POOL_INITIALIZE,                /* 0x5a4f */
1270         ZFS_IOC_POOL_TRIM,                      /* 0x5a50 */
1271
1272         /*
1273          * Linux - 3/64 numbers reserved.
1274          */
1275         ZFS_IOC_LINUX = ('Z' << 8) + 0x80,
1276         ZFS_IOC_EVENTS_NEXT,                    /* 0x5a81 */
1277         ZFS_IOC_EVENTS_CLEAR,                   /* 0x5a82 */
1278         ZFS_IOC_EVENTS_SEEK,                    /* 0x5a83 */
1279
1280         /*
1281          * FreeBSD - 1/64 numbers reserved.
1282          */
1283         ZFS_IOC_FREEBSD = ('Z' << 8) + 0xC0,
1284
1285         ZFS_IOC_LAST
1286 } zfs_ioc_t;
1287
1288 /*
1289  * zvol ioctl to get dataset name
1290  */
1291 #define BLKZNAME                _IOR(0x12, 125, char[ZFS_MAX_DATASET_NAME_LEN])
1292
1293 /*
1294  * ZFS-specific error codes used for returning descriptive errors
1295  * to the userland through zfs ioctls.
1296  *
1297  * The enum implicitly includes all the error codes from errno.h.
1298  * New code should use and extend this enum for errors that are
1299  * not described precisely by generic errno codes.
1300  *
1301  * These numbers should not change over time. New entries should be appended.
1302  */
1303 typedef enum {
1304         ZFS_ERR_CHECKPOINT_EXISTS = 1024,
1305         ZFS_ERR_DISCARDING_CHECKPOINT,
1306         ZFS_ERR_NO_CHECKPOINT,
1307         ZFS_ERR_DEVRM_IN_PROGRESS,
1308         ZFS_ERR_VDEV_TOO_BIG,
1309         ZFS_ERR_IOC_CMD_UNAVAIL,
1310         ZFS_ERR_IOC_ARG_UNAVAIL,
1311         ZFS_ERR_IOC_ARG_REQUIRED,
1312         ZFS_ERR_IOC_ARG_BADTYPE,
1313         ZFS_ERR_WRONG_PARENT,
1314         ZFS_ERR_FROM_IVSET_GUID_MISSING,
1315         ZFS_ERR_FROM_IVSET_GUID_MISMATCH,
1316 } zfs_errno_t;
1317
1318 /*
1319  * Internal SPA load state.  Used by FMA diagnosis engine.
1320  */
1321 typedef enum {
1322         SPA_LOAD_NONE,          /* no load in progress  */
1323         SPA_LOAD_OPEN,          /* normal open          */
1324         SPA_LOAD_IMPORT,        /* import in progress   */
1325         SPA_LOAD_TRYIMPORT,     /* tryimport in progress */
1326         SPA_LOAD_RECOVER,       /* recovery requested   */
1327         SPA_LOAD_ERROR,         /* load failed          */
1328         SPA_LOAD_CREATE         /* creation in progress */
1329 } spa_load_state_t;
1330
1331 /*
1332  * Bookmark name values.
1333  */
1334 #define ZPOOL_ERR_LIST          "error list"
1335 #define ZPOOL_ERR_DATASET       "dataset"
1336 #define ZPOOL_ERR_OBJECT        "object"
1337
1338 #define HIS_MAX_RECORD_LEN      (MAXPATHLEN + MAXPATHLEN + 1)
1339
1340 /*
1341  * The following are names used in the nvlist describing
1342  * the pool's history log.
1343  */
1344 #define ZPOOL_HIST_RECORD       "history record"
1345 #define ZPOOL_HIST_TIME         "history time"
1346 #define ZPOOL_HIST_CMD          "history command"
1347 #define ZPOOL_HIST_WHO          "history who"
1348 #define ZPOOL_HIST_ZONE         "history zone"
1349 #define ZPOOL_HIST_HOST         "history hostname"
1350 #define ZPOOL_HIST_TXG          "history txg"
1351 #define ZPOOL_HIST_INT_EVENT    "history internal event"
1352 #define ZPOOL_HIST_INT_STR      "history internal str"
1353 #define ZPOOL_HIST_INT_NAME     "internal_name"
1354 #define ZPOOL_HIST_IOCTL        "ioctl"
1355 #define ZPOOL_HIST_INPUT_NVL    "in_nvl"
1356 #define ZPOOL_HIST_OUTPUT_NVL   "out_nvl"
1357 #define ZPOOL_HIST_DSNAME       "dsname"
1358 #define ZPOOL_HIST_DSID         "dsid"
1359 #define ZPOOL_HIST_ERRNO        "errno"
1360
1361 /*
1362  * Special nvlist name that will not have its args recorded in the pool's
1363  * history log.
1364  */
1365 #define ZPOOL_HIDDEN_ARGS       "hidden_args"
1366
1367 /*
1368  * The following are names used when invoking ZFS_IOC_POOL_INITIALIZE.
1369  */
1370 #define ZPOOL_INITIALIZE_COMMAND        "initialize_command"
1371 #define ZPOOL_INITIALIZE_VDEVS          "initialize_vdevs"
1372
1373 /*
1374  * The following are names used when invoking ZFS_IOC_POOL_TRIM.
1375  */
1376 #define ZPOOL_TRIM_COMMAND              "trim_command"
1377 #define ZPOOL_TRIM_VDEVS                "trim_vdevs"
1378 #define ZPOOL_TRIM_RATE                 "trim_rate"
1379 #define ZPOOL_TRIM_SECURE               "trim_secure"
1380
1381 /*
1382  * Flags for ZFS_IOC_VDEV_SET_STATE
1383  */
1384 #define ZFS_ONLINE_CHECKREMOVE  0x1
1385 #define ZFS_ONLINE_UNSPARE      0x2
1386 #define ZFS_ONLINE_FORCEFAULT   0x4
1387 #define ZFS_ONLINE_EXPAND       0x8
1388 #define ZFS_OFFLINE_TEMPORARY   0x1
1389
1390 /*
1391  * Flags for ZFS_IOC_POOL_IMPORT
1392  */
1393 #define ZFS_IMPORT_NORMAL       0x0
1394 #define ZFS_IMPORT_VERBATIM     0x1
1395 #define ZFS_IMPORT_ANY_HOST     0x2
1396 #define ZFS_IMPORT_MISSING_LOG  0x4
1397 #define ZFS_IMPORT_ONLY         0x8
1398 #define ZFS_IMPORT_TEMP_NAME    0x10
1399 #define ZFS_IMPORT_SKIP_MMP     0x20
1400 #define ZFS_IMPORT_LOAD_KEYS    0x40
1401 #define ZFS_IMPORT_CHECKPOINT   0x80
1402
1403 /*
1404  * Channel program argument/return nvlist keys and defaults.
1405  */
1406 #define ZCP_ARG_PROGRAM         "program"
1407 #define ZCP_ARG_ARGLIST         "arg"
1408 #define ZCP_ARG_SYNC            "sync"
1409 #define ZCP_ARG_INSTRLIMIT      "instrlimit"
1410 #define ZCP_ARG_MEMLIMIT        "memlimit"
1411
1412 #define ZCP_ARG_CLIARGV         "argv"
1413
1414 #define ZCP_RET_ERROR           "error"
1415 #define ZCP_RET_RETURN          "return"
1416
1417 #define ZCP_DEFAULT_INSTRLIMIT  (10 * 1000 * 1000)
1418 #define ZCP_MAX_INSTRLIMIT      (10 * ZCP_DEFAULT_INSTRLIMIT)
1419 #define ZCP_DEFAULT_MEMLIMIT    (10 * 1024 * 1024)
1420 #define ZCP_MAX_MEMLIMIT        (10 * ZCP_DEFAULT_MEMLIMIT)
1421
1422 /*
1423  * Sysevent payload members.  ZFS will generate the following sysevents with the
1424  * given payloads:
1425  *
1426  *      ESC_ZFS_RESILVER_START
1427  *      ESC_ZFS_RESILVER_END
1428  *      ESC_ZFS_POOL_DESTROY
1429  *      ESC_ZFS_POOL_REGUID
1430  *
1431  *              ZFS_EV_POOL_NAME        DATA_TYPE_STRING
1432  *              ZFS_EV_POOL_GUID        DATA_TYPE_UINT64
1433  *
1434  *      ESC_ZFS_VDEV_REMOVE
1435  *      ESC_ZFS_VDEV_CLEAR
1436  *      ESC_ZFS_VDEV_CHECK
1437  *
1438  *              ZFS_EV_POOL_NAME        DATA_TYPE_STRING
1439  *              ZFS_EV_POOL_GUID        DATA_TYPE_UINT64
1440  *              ZFS_EV_VDEV_PATH        DATA_TYPE_STRING        (optional)
1441  *              ZFS_EV_VDEV_GUID        DATA_TYPE_UINT64
1442  *
1443  *      ESC_ZFS_HISTORY_EVENT
1444  *
1445  *              ZFS_EV_POOL_NAME        DATA_TYPE_STRING
1446  *              ZFS_EV_POOL_GUID        DATA_TYPE_UINT64
1447  *              ZFS_EV_HIST_TIME        DATA_TYPE_UINT64        (optional)
1448  *              ZFS_EV_HIST_CMD         DATA_TYPE_STRING        (optional)
1449  *              ZFS_EV_HIST_WHO         DATA_TYPE_UINT64        (optional)
1450  *              ZFS_EV_HIST_ZONE        DATA_TYPE_STRING        (optional)
1451  *              ZFS_EV_HIST_HOST        DATA_TYPE_STRING        (optional)
1452  *              ZFS_EV_HIST_TXG         DATA_TYPE_UINT64        (optional)
1453  *              ZFS_EV_HIST_INT_EVENT   DATA_TYPE_UINT64        (optional)
1454  *              ZFS_EV_HIST_INT_STR     DATA_TYPE_STRING        (optional)
1455  *              ZFS_EV_HIST_INT_NAME    DATA_TYPE_STRING        (optional)
1456  *              ZFS_EV_HIST_IOCTL       DATA_TYPE_STRING        (optional)
1457  *              ZFS_EV_HIST_DSNAME      DATA_TYPE_STRING        (optional)
1458  *              ZFS_EV_HIST_DSID        DATA_TYPE_UINT64        (optional)
1459  *
1460  * The ZFS_EV_HIST_* members will correspond to the ZPOOL_HIST_* members in the
1461  * history log nvlist.  The keynames will be free of any spaces or other
1462  * characters that could be potentially unexpected to consumers of the
1463  * sysevents.
1464  */
1465 #define ZFS_EV_POOL_NAME        "pool_name"
1466 #define ZFS_EV_POOL_GUID        "pool_guid"
1467 #define ZFS_EV_VDEV_PATH        "vdev_path"
1468 #define ZFS_EV_VDEV_GUID        "vdev_guid"
1469 #define ZFS_EV_HIST_TIME        "history_time"
1470 #define ZFS_EV_HIST_CMD         "history_command"
1471 #define ZFS_EV_HIST_WHO         "history_who"
1472 #define ZFS_EV_HIST_ZONE        "history_zone"
1473 #define ZFS_EV_HIST_HOST        "history_hostname"
1474 #define ZFS_EV_HIST_TXG         "history_txg"
1475 #define ZFS_EV_HIST_INT_EVENT   "history_internal_event"
1476 #define ZFS_EV_HIST_INT_STR     "history_internal_str"
1477 #define ZFS_EV_HIST_INT_NAME    "history_internal_name"
1478 #define ZFS_EV_HIST_IOCTL       "history_ioctl"
1479 #define ZFS_EV_HIST_DSNAME      "history_dsname"
1480 #define ZFS_EV_HIST_DSID        "history_dsid"
1481
1482 #ifdef  __cplusplus
1483 }
1484 #endif
1485
1486 #endif  /* _SYS_FS_ZFS_H */