sys/cddl/contrib/opensolaris/uts/common/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, 2016 by Delphix. All rights reserved.
  25  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  26  * Copyright (c) 2012, Martin Matuska <mm@FreeBSD.org>. All rights reserved.
  27  * Copyright (c) 2014 Integros [integros.com]
  28  * Copyright 2017 Joyent, Inc.
  29  * Copyright (c) 2019 Datto Inc.
  30  * Copyright (c) 2017, Intel Corporation.
  31  */
  32
  33 /* Portions Copyright 2010 Robert Milkowski */
  34
  35 #ifndef _SYS_FS_ZFS_H
  36 #define _SYS_FS_ZFS_H
  37
  38 #include <sys/types.h>
  39 #include <sys/ioccom.h>
  40 #include <sys/time.h>
  41
  42 #ifdef  __cplusplus
  43 extern "C" {
  44 #endif
  45
  46 /*
  47  * Types and constants shared between userland and the kernel.
  48  */
  49
  50 /*
  51  * Each dataset can be one of the following types.  These constants can be
  52  * combined into masks that can be passed to various functions.
  53  */
  54 typedef enum {
  55         ZFS_TYPE_FILESYSTEM     = (1 << 0),
  56         ZFS_TYPE_SNAPSHOT       = (1 << 1),
  57         ZFS_TYPE_VOLUME         = (1 << 2),
  58         ZFS_TYPE_POOL           = (1 << 3),
  59         ZFS_TYPE_BOOKMARK       = (1 << 4)
  60 } zfs_type_t;
  61
  62 /*
  63  * NB: lzc_dataset_type should be updated whenever a new objset type is added,
  64  * if it represents a real type of a dataset that can be created from userland.
  65  */
  66 typedef enum dmu_objset_type {
  67         DMU_OST_NONE,
  68         DMU_OST_META,
  69         DMU_OST_ZFS,
  70         DMU_OST_ZVOL,
  71         DMU_OST_OTHER,                  /* For testing only! */
  72         DMU_OST_ANY,                    /* Be careful! */
  73         DMU_OST_NUMTYPES
  74 } dmu_objset_type_t;
  75
  76 #define ZFS_TYPE_DATASET        \
  77         (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME | ZFS_TYPE_SNAPSHOT)
  78
  79 /*
  80  * All of these include the terminating NUL byte.
  81  */
  82 #define ZAP_MAXNAMELEN 256
  83 #define ZAP_MAXVALUELEN (1024 * 8)
  84 #define ZAP_OLDMAXVALUELEN 1024
  85 #define ZFS_MAX_DATASET_NAME_LEN 256
  86
  87 /*
  88  * Dataset properties are identified by these constants and must be added to
  89  * the end of this list to ensure that external consumers are not affected
  90  * by the change. If you make any changes to this list, be sure to update
  91  * the property table in usr/src/common/zfs/zfs_prop.c.
  92  */
  93 typedef enum {
  94         ZPROP_CONT = -2,
  95         ZPROP_INVAL = -1,
  96         ZFS_PROP_TYPE = 0,
  97         ZFS_PROP_CREATION,
  98         ZFS_PROP_USED,
  99         ZFS_PROP_AVAILABLE,
 100         ZFS_PROP_REFERENCED,
 101         ZFS_PROP_COMPRESSRATIO,
 102         ZFS_PROP_MOUNTED,
 103         ZFS_PROP_ORIGIN,
 104         ZFS_PROP_QUOTA,
 105         ZFS_PROP_RESERVATION,
 106         ZFS_PROP_VOLSIZE,
 107         ZFS_PROP_VOLBLOCKSIZE,
 108         ZFS_PROP_RECORDSIZE,
 109         ZFS_PROP_MOUNTPOINT,
 110         ZFS_PROP_SHARENFS,
 111         ZFS_PROP_CHECKSUM,
 112         ZFS_PROP_COMPRESSION,
 113         ZFS_PROP_ATIME,
 114         ZFS_PROP_DEVICES,
 115         ZFS_PROP_EXEC,
 116         ZFS_PROP_SETUID,
 117         ZFS_PROP_READONLY,
 118         ZFS_PROP_ZONED,
 119         ZFS_PROP_SNAPDIR,
 120         ZFS_PROP_ACLMODE,
 121         ZFS_PROP_ACLINHERIT,
 122         ZFS_PROP_CREATETXG,
 123         ZFS_PROP_NAME,                  /* not exposed to the user */
 124         ZFS_PROP_CANMOUNT,
 125         ZFS_PROP_ISCSIOPTIONS,          /* not exposed to the user */
 126         ZFS_PROP_XATTR,
 127         ZFS_PROP_NUMCLONES,             /* not exposed to the user */
 128         ZFS_PROP_COPIES,
 129         ZFS_PROP_VERSION,
 130         ZFS_PROP_UTF8ONLY,
 131         ZFS_PROP_NORMALIZE,
 132         ZFS_PROP_CASE,
 133         ZFS_PROP_VSCAN,
 134         ZFS_PROP_NBMAND,
 135         ZFS_PROP_SHARESMB,
 136         ZFS_PROP_REFQUOTA,
 137         ZFS_PROP_REFRESERVATION,
 138         ZFS_PROP_GUID,
 139         ZFS_PROP_PRIMARYCACHE,
 140         ZFS_PROP_SECONDARYCACHE,
 141         ZFS_PROP_USEDSNAP,
 142         ZFS_PROP_USEDDS,
 143         ZFS_PROP_USEDCHILD,
 144         ZFS_PROP_USEDREFRESERV,
 145         ZFS_PROP_USERACCOUNTING,        /* not exposed to the user */
 146         ZFS_PROP_STMF_SHAREINFO,        /* not exposed to the user */
 147         ZFS_PROP_DEFER_DESTROY,
 148         ZFS_PROP_USERREFS,
 149         ZFS_PROP_LOGBIAS,
 150         ZFS_PROP_UNIQUE,                /* not exposed to the user */
 151         ZFS_PROP_OBJSETID,
 152         ZFS_PROP_DEDUP,
 153         ZFS_PROP_MLSLABEL,
 154         ZFS_PROP_SYNC,
 155         ZFS_PROP_DNODESIZE,
 156         ZFS_PROP_REFRATIO,
 157         ZFS_PROP_WRITTEN,
 158         ZFS_PROP_CLONES,
 159         ZFS_PROP_LOGICALUSED,
 160         ZFS_PROP_LOGICALREFERENCED,
 161         ZFS_PROP_INCONSISTENT,          /* not exposed to the user */
 162         ZFS_PROP_VOLMODE,
 163         ZFS_PROP_FILESYSTEM_LIMIT,
 164         ZFS_PROP_SNAPSHOT_LIMIT,
 165         ZFS_PROP_FILESYSTEM_COUNT,
 166         ZFS_PROP_SNAPSHOT_COUNT,
 167         ZFS_PROP_REDUNDANT_METADATA,
 168         ZFS_PROP_PREV_SNAP,
 169         ZFS_PROP_RECEIVE_RESUME_TOKEN,
 170         ZFS_PROP_REMAPTXG,              /* not exposed to the user */
 171         ZFS_PROP_SPECIAL_SMALL_BLOCKS,
 172         ZFS_NUM_PROPS
 173 } zfs_prop_t;
 174
 175 typedef enum {
 176         ZFS_PROP_USERUSED,
 177         ZFS_PROP_USERQUOTA,
 178         ZFS_PROP_GROUPUSED,
 179         ZFS_PROP_GROUPQUOTA,
 180         ZFS_NUM_USERQUOTA_PROPS
 181 } zfs_userquota_prop_t;
 182
 183 extern const char *zfs_userquota_prop_prefixes[ZFS_NUM_USERQUOTA_PROPS];
 184
 185 /*
 186  * Pool properties are identified by these constants and must be added to the
 187  * end of this list to ensure that external consumers are not affected
 188  * by the change. If you make any changes to this list, be sure to update
 189  * the property table in usr/src/common/zfs/zpool_prop.c.
 190  */
 191 typedef enum {
 192         ZPOOL_PROP_INVAL = -1,
 193         ZPOOL_PROP_NAME,
 194         ZPOOL_PROP_SIZE,
 195         ZPOOL_PROP_CAPACITY,
 196         ZPOOL_PROP_ALTROOT,
 197         ZPOOL_PROP_HEALTH,
 198         ZPOOL_PROP_GUID,
 199         ZPOOL_PROP_VERSION,
 200         ZPOOL_PROP_BOOTFS,
 201         ZPOOL_PROP_DELEGATION,
 202         ZPOOL_PROP_AUTOREPLACE,
 203         ZPOOL_PROP_CACHEFILE,
 204         ZPOOL_PROP_FAILUREMODE,
 205         ZPOOL_PROP_LISTSNAPS,
 206         ZPOOL_PROP_AUTOEXPAND,
 207         ZPOOL_PROP_DEDUPDITTO,
 208         ZPOOL_PROP_DEDUPRATIO,
 209         ZPOOL_PROP_FREE,
 210         ZPOOL_PROP_ALLOCATED,
 211         ZPOOL_PROP_READONLY,
 212         ZPOOL_PROP_COMMENT,
 213         ZPOOL_PROP_EXPANDSZ,
 214         ZPOOL_PROP_FREEING,
 215         ZPOOL_PROP_FRAGMENTATION,
 216         ZPOOL_PROP_LEAKED,
 217         ZPOOL_PROP_MAXBLOCKSIZE,
 218         ZPOOL_PROP_BOOTSIZE,
 219         ZPOOL_PROP_CHECKPOINT,
 220         ZPOOL_PROP_TNAME,
 221         ZPOOL_PROP_MAXDNODESIZE,
 222         ZPOOL_PROP_MULTIHOST,
 223         ZPOOL_PROP_LOAD_GUID,
 224         ZPOOL_NUM_PROPS
 225 } zpool_prop_t;
 226
 227 /* Small enough to not hog a whole line of printout in zpool(1M). */
 228 #define ZPROP_MAX_COMMENT       32
 229
 230 #define ZPROP_VALUE             "value"
 231 #define ZPROP_SOURCE            "source"
 232
 233 typedef enum {
 234         ZPROP_SRC_NONE = 0x1,
 235         ZPROP_SRC_DEFAULT = 0x2,
 236         ZPROP_SRC_TEMPORARY = 0x4,
 237         ZPROP_SRC_LOCAL = 0x8,
 238         ZPROP_SRC_INHERITED = 0x10,
 239         ZPROP_SRC_RECEIVED = 0x20
 240 } zprop_source_t;
 241
 242 #define ZPROP_SRC_ALL   0x3f
 243
 244 #define ZPROP_SOURCE_VAL_RECVD  "$recvd"
 245 #define ZPROP_N_MORE_ERRORS     "N_MORE_ERRORS"
 246 /*
 247  * Dataset flag implemented as a special entry in the props zap object
 248  * indicating that the dataset has received properties on or after
 249  * SPA_VERSION_RECVD_PROPS. The first such receive blows away local properties
 250  * just as it did in earlier versions, and thereafter, local properties are
 251  * preserved.
 252  */
 253 #define ZPROP_HAS_RECVD         "$hasrecvd"
 254
 255 typedef enum {
 256         ZPROP_ERR_NOCLEAR = 0x1, /* failure to clear existing props */
 257         ZPROP_ERR_NORESTORE = 0x2 /* failure to restore props on error */
 258 } zprop_errflags_t;
 259
 260 typedef int (*zprop_func)(int, void *);
 261
 262 /*
 263  * Properties to be set on the root file system of a new pool
 264  * are stuffed into their own nvlist, which is then included in
 265  * the properties nvlist with the pool properties.
 266  */
 267 #define ZPOOL_ROOTFS_PROPS      "root-props-nvl"
 268
 269 /*
 270  * Length of 'written@' and 'written#'
 271  */
 272 #define ZFS_WRITTEN_PROP_PREFIX_LEN     8
 273
 274 /*
 275  * Dataset property functions shared between libzfs and kernel.
 276  */
 277 const char *zfs_prop_default_string(zfs_prop_t);
 278 uint64_t zfs_prop_default_numeric(zfs_prop_t);
 279 boolean_t zfs_prop_readonly(zfs_prop_t);
 280 boolean_t zfs_prop_visible(zfs_prop_t prop);
 281 boolean_t zfs_prop_inheritable(zfs_prop_t);
 282 boolean_t zfs_prop_setonce(zfs_prop_t);
 283 const char *zfs_prop_to_name(zfs_prop_t);
 284 zfs_prop_t zfs_name_to_prop(const char *);
 285 boolean_t zfs_prop_user(const char *);
 286 boolean_t zfs_prop_userquota(const char *);
 287 int zfs_prop_index_to_string(zfs_prop_t, uint64_t, const char **);
 288 int zfs_prop_string_to_index(zfs_prop_t, const char *, uint64_t *);
 289 uint64_t zfs_prop_random_value(zfs_prop_t, uint64_t seed);
 290 boolean_t zfs_prop_valid_for_type(int, zfs_type_t);
 291
 292 /*
 293  * Pool property functions shared between libzfs and kernel.
 294  */
 295 zpool_prop_t zpool_name_to_prop(const char *);
 296 const char *zpool_prop_to_name(zpool_prop_t);
 297 const char *zpool_prop_default_string(zpool_prop_t);
 298 uint64_t zpool_prop_default_numeric(zpool_prop_t);
 299 boolean_t zpool_prop_readonly(zpool_prop_t);
 300 boolean_t zpool_prop_feature(const char *);
 301 boolean_t zpool_prop_unsupported(const char *name);
 302 int zpool_prop_index_to_string(zpool_prop_t, uint64_t, const char **);
 303 int zpool_prop_string_to_index(zpool_prop_t, const char *, uint64_t *);
 304 uint64_t zpool_prop_random_value(zpool_prop_t, uint64_t seed);
 305
 306 /*
 307  * Definitions for the Delegation.
 308  */
 309 typedef enum {
 310         ZFS_DELEG_WHO_UNKNOWN = 0,
 311         ZFS_DELEG_USER = 'u',
 312         ZFS_DELEG_USER_SETS = 'U',
 313         ZFS_DELEG_GROUP = 'g',
 314         ZFS_DELEG_GROUP_SETS = 'G',
 315         ZFS_DELEG_EVERYONE = 'e',
 316         ZFS_DELEG_EVERYONE_SETS = 'E',
 317         ZFS_DELEG_CREATE = 'c',
 318         ZFS_DELEG_CREATE_SETS = 'C',
 319         ZFS_DELEG_NAMED_SET = 's',
 320         ZFS_DELEG_NAMED_SET_SETS = 'S'
 321 } zfs_deleg_who_type_t;
 322
 323 typedef enum {
 324         ZFS_DELEG_NONE = 0,
 325         ZFS_DELEG_PERM_LOCAL = 1,
 326         ZFS_DELEG_PERM_DESCENDENT = 2,
 327         ZFS_DELEG_PERM_LOCALDESCENDENT = 3,
 328         ZFS_DELEG_PERM_CREATE = 4
 329 } zfs_deleg_inherit_t;
 330
 331 #define ZFS_DELEG_PERM_UID      "uid"
 332 #define ZFS_DELEG_PERM_GID      "gid"
 333 #define ZFS_DELEG_PERM_GROUPS   "groups"
 334
 335 #define ZFS_MLSLABEL_DEFAULT    "none"
 336
 337 #define ZFS_SMB_ACL_SRC         "src"
 338 #define ZFS_SMB_ACL_TARGET      "target"
 339
 340 typedef enum {
 341         ZFS_CANMOUNT_OFF = 0,
 342         ZFS_CANMOUNT_ON = 1,
 343         ZFS_CANMOUNT_NOAUTO = 2
 344 } zfs_canmount_type_t;
 345
 346 typedef enum {
 347         ZFS_LOGBIAS_LATENCY = 0,
 348         ZFS_LOGBIAS_THROUGHPUT = 1
 349 } zfs_logbias_op_t;
 350
 351 typedef enum zfs_share_op {
 352         ZFS_SHARE_NFS = 0,
 353         ZFS_UNSHARE_NFS = 1,
 354         ZFS_SHARE_SMB = 2,
 355         ZFS_UNSHARE_SMB = 3
 356 } zfs_share_op_t;
 357
 358 typedef enum zfs_smb_acl_op {
 359         ZFS_SMB_ACL_ADD,
 360         ZFS_SMB_ACL_REMOVE,
 361         ZFS_SMB_ACL_RENAME,
 362         ZFS_SMB_ACL_PURGE
 363 } zfs_smb_acl_op_t;
 364
 365 typedef enum zfs_cache_type {
 366         ZFS_CACHE_NONE = 0,
 367         ZFS_CACHE_METADATA = 1,
 368         ZFS_CACHE_ALL = 2
 369 } zfs_cache_type_t;
 370
 371 typedef enum {
 372         ZFS_SYNC_STANDARD = 0,
 373         ZFS_SYNC_ALWAYS = 1,
 374         ZFS_SYNC_DISABLED = 2
 375 } zfs_sync_type_t;
 376
 377 typedef enum {
 378         ZFS_VOLMODE_DEFAULT = 0,
 379         ZFS_VOLMODE_GEOM = 1,
 380         ZFS_VOLMODE_DEV = 2,
 381         ZFS_VOLMODE_NONE = 3
 382 } zfs_volmode_t;
 383
 384 typedef enum {
 385         ZFS_DNSIZE_LEGACY = 0,
 386         ZFS_DNSIZE_AUTO = 1,
 387         ZFS_DNSIZE_1K = 1024,
 388         ZFS_DNSIZE_2K = 2048,
 389         ZFS_DNSIZE_4K = 4096,
 390         ZFS_DNSIZE_8K = 8192,
 391         ZFS_DNSIZE_16K = 16384
 392 } zfs_dnsize_type_t;
 393
 394 typedef enum {
 395         ZFS_REDUNDANT_METADATA_ALL,
 396         ZFS_REDUNDANT_METADATA_MOST
 397 } zfs_redundant_metadata_type_t;
 398
 399 /*
 400  * On-disk version number.
 401  */
 402 #define SPA_VERSION_1                   1ULL
 403 #define SPA_VERSION_2                   2ULL
 404 #define SPA_VERSION_3                   3ULL
 405 #define SPA_VERSION_4                   4ULL
 406 #define SPA_VERSION_5                   5ULL
 407 #define SPA_VERSION_6                   6ULL
 408 #define SPA_VERSION_7                   7ULL
 409 #define SPA_VERSION_8                   8ULL
 410 #define SPA_VERSION_9                   9ULL
 411 #define SPA_VERSION_10                  10ULL
 412 #define SPA_VERSION_11                  11ULL
 413 #define SPA_VERSION_12                  12ULL
 414 #define SPA_VERSION_13                  13ULL
 415 #define SPA_VERSION_14                  14ULL
 416 #define SPA_VERSION_15                  15ULL
 417 #define SPA_VERSION_16                  16ULL
 418 #define SPA_VERSION_17                  17ULL
 419 #define SPA_VERSION_18                  18ULL
 420 #define SPA_VERSION_19                  19ULL
 421 #define SPA_VERSION_20                  20ULL
 422 #define SPA_VERSION_21                  21ULL
 423 #define SPA_VERSION_22                  22ULL
 424 #define SPA_VERSION_23                  23ULL
 425 #define SPA_VERSION_24                  24ULL
 426 #define SPA_VERSION_25                  25ULL
 427 #define SPA_VERSION_26                  26ULL
 428 #define SPA_VERSION_27                  27ULL
 429 #define SPA_VERSION_28                  28ULL
 430 #define SPA_VERSION_5000                5000ULL
 431
 432 /*
 433  * When bumping up SPA_VERSION, make sure GRUB ZFS understands the on-disk
 434  * format change. Go to usr/src/grub/grub-0.97/stage2/{zfs-include/, fsys_zfs*},
 435  * and do the appropriate changes.  Also bump the version number in
 436  * usr/src/grub/capability.
 437  */
 438 #define SPA_VERSION                     SPA_VERSION_5000
 439 #define SPA_VERSION_STRING              "5000"
 440
 441 /*
 442  * Symbolic names for the changes that caused a SPA_VERSION switch.
 443  * Used in the code when checking for presence or absence of a feature.
 444  * Feel free to define multiple symbolic names for each version if there
 445  * were multiple changes to on-disk structures during that version.
 446  *
 447  * NOTE: When checking the current SPA_VERSION in your code, be sure
 448  *       to use spa_version() since it reports the version of the
 449  *       last synced uberblock.  Checking the in-flight version can
 450  *       be dangerous in some cases.
 451  */
 452 #define SPA_VERSION_INITIAL             SPA_VERSION_1
 453 #define SPA_VERSION_DITTO_BLOCKS        SPA_VERSION_2
 454 #define SPA_VERSION_SPARES              SPA_VERSION_3
 455 #define SPA_VERSION_RAIDZ2              SPA_VERSION_3
 456 #define SPA_VERSION_BPOBJ_ACCOUNT       SPA_VERSION_3
 457 #define SPA_VERSION_RAIDZ_DEFLATE       SPA_VERSION_3
 458 #define SPA_VERSION_DNODE_BYTES         SPA_VERSION_3
 459 #define SPA_VERSION_ZPOOL_HISTORY       SPA_VERSION_4
 460 #define SPA_VERSION_GZIP_COMPRESSION    SPA_VERSION_5
 461 #define SPA_VERSION_BOOTFS              SPA_VERSION_6
 462 #define SPA_VERSION_SLOGS               SPA_VERSION_7
 463 #define SPA_VERSION_DELEGATED_PERMS     SPA_VERSION_8
 464 #define SPA_VERSION_FUID                SPA_VERSION_9
 465 #define SPA_VERSION_REFRESERVATION      SPA_VERSION_9
 466 #define SPA_VERSION_REFQUOTA            SPA_VERSION_9
 467 #define SPA_VERSION_UNIQUE_ACCURATE     SPA_VERSION_9
 468 #define SPA_VERSION_L2CACHE             SPA_VERSION_10
 469 #define SPA_VERSION_NEXT_CLONES         SPA_VERSION_11
 470 #define SPA_VERSION_ORIGIN              SPA_VERSION_11
 471 #define SPA_VERSION_DSL_SCRUB           SPA_VERSION_11
 472 #define SPA_VERSION_SNAP_PROPS          SPA_VERSION_12
 473 #define SPA_VERSION_USED_BREAKDOWN      SPA_VERSION_13
 474 #define SPA_VERSION_PASSTHROUGH_X       SPA_VERSION_14
 475 #define SPA_VERSION_USERSPACE           SPA_VERSION_15
 476 #define SPA_VERSION_STMF_PROP           SPA_VERSION_16
 477 #define SPA_VERSION_RAIDZ3              SPA_VERSION_17
 478 #define SPA_VERSION_USERREFS            SPA_VERSION_18
 479 #define SPA_VERSION_HOLES               SPA_VERSION_19
 480 #define SPA_VERSION_ZLE_COMPRESSION     SPA_VERSION_20
 481 #define SPA_VERSION_DEDUP               SPA_VERSION_21
 482 #define SPA_VERSION_RECVD_PROPS         SPA_VERSION_22
 483 #define SPA_VERSION_SLIM_ZIL            SPA_VERSION_23
 484 #define SPA_VERSION_SA                  SPA_VERSION_24
 485 #define SPA_VERSION_SCAN                SPA_VERSION_25
 486 #define SPA_VERSION_DIR_CLONES          SPA_VERSION_26
 487 #define SPA_VERSION_DEADLISTS           SPA_VERSION_26
 488 #define SPA_VERSION_FAST_SNAP           SPA_VERSION_27
 489 #define SPA_VERSION_MULTI_REPLACE       SPA_VERSION_28
 490 #define SPA_VERSION_BEFORE_FEATURES     SPA_VERSION_28
 491 #define SPA_VERSION_FEATURES            SPA_VERSION_5000
 492
 493 #define SPA_VERSION_IS_SUPPORTED(v) \
 494         (((v) >= SPA_VERSION_INITIAL && (v) <= SPA_VERSION_BEFORE_FEATURES) || \
 495         ((v) >= SPA_VERSION_FEATURES && (v) <= SPA_VERSION))
 496
 497 /*
 498  * ZPL version - rev'd whenever an incompatible on-disk format change
 499  * occurs.  This is independent of SPA/DMU/ZAP versioning.  You must
 500  * also update the version_table[] and help message in zfs_prop.c.
 501  *
 502  * When changing, be sure to teach GRUB how to read the new format!
 503  * See usr/src/grub/grub-0.97/stage2/{zfs-include/,fsys_zfs*}
 504  */
 505 #define ZPL_VERSION_1                   1ULL
 506 #define ZPL_VERSION_2                   2ULL
 507 #define ZPL_VERSION_3                   3ULL
 508 #define ZPL_VERSION_4                   4ULL
 509 #define ZPL_VERSION_5                   5ULL
 510 #define ZPL_VERSION                     ZPL_VERSION_5
 511 #define ZPL_VERSION_STRING              "5"
 512
 513 #define ZPL_VERSION_INITIAL             ZPL_VERSION_1
 514 #define ZPL_VERSION_DIRENT_TYPE         ZPL_VERSION_2
 515 #define ZPL_VERSION_FUID                ZPL_VERSION_3
 516 #define ZPL_VERSION_NORMALIZATION       ZPL_VERSION_3
 517 #define ZPL_VERSION_SYSATTR             ZPL_VERSION_3
 518 #define ZPL_VERSION_USERSPACE           ZPL_VERSION_4
 519 #define ZPL_VERSION_SA                  ZPL_VERSION_5
 520
 521 /* Rewind policy information */
 522 #define ZPOOL_NO_REWIND         1  /* No policy - default behavior */
 523 #define ZPOOL_NEVER_REWIND      2  /* Do not search for best txg or rewind */
 524 #define ZPOOL_TRY_REWIND        4  /* Search for best txg, but do not rewind */
 525 #define ZPOOL_DO_REWIND         8  /* Rewind to best txg w/in deferred frees */
 526 #define ZPOOL_EXTREME_REWIND    16 /* Allow extreme measures to find best txg */
 527 #define ZPOOL_REWIND_MASK       28 /* All the possible rewind bits */
 528 #define ZPOOL_REWIND_POLICIES   31 /* All the possible policy bits */
 529
 530 typedef struct zpool_load_policy {
 531         uint32_t        zlp_rewind;     /* rewind policy requested */
 532         uint64_t        zlp_maxmeta;    /* max acceptable meta-data errors */
 533         uint64_t        zlp_maxdata;    /* max acceptable data errors */
 534         uint64_t        zlp_txg;        /* specific txg to load */
 535 } zpool_load_policy_t;
 536
 537 /*
 538  * The following are configuration names used in the nvlist describing a pool's
 539  * configuration.  New on-disk names should be prefixed with "<reverse-DNS>:"
 540  * (e.g. "org.open-zfs:") to avoid conflicting names being developed
 541  * independently.
 542  */
 543 #define ZPOOL_CONFIG_VERSION            "version"
 544 #define ZPOOL_CONFIG_POOL_NAME          "name"
 545 #define ZPOOL_CONFIG_POOL_STATE         "state"
 546 #define ZPOOL_CONFIG_POOL_TXG           "txg"
 547 #define ZPOOL_CONFIG_POOL_GUID          "pool_guid"
 548 #define ZPOOL_CONFIG_CREATE_TXG         "create_txg"
 549 #define ZPOOL_CONFIG_TOP_GUID           "top_guid"
 550 #define ZPOOL_CONFIG_VDEV_TREE          "vdev_tree"
 551 #define ZPOOL_CONFIG_TYPE               "type"
 552 #define ZPOOL_CONFIG_CHILDREN           "children"
 553 #define ZPOOL_CONFIG_ID                 "id"
 554 #define ZPOOL_CONFIG_GUID               "guid"
 555 #define ZPOOL_CONFIG_INDIRECT_OBJECT    "com.delphix:indirect_object"
 556 #define ZPOOL_CONFIG_INDIRECT_BIRTHS    "com.delphix:indirect_births"
 557 #define ZPOOL_CONFIG_PREV_INDIRECT_VDEV "com.delphix:prev_indirect_vdev"
 558 #define ZPOOL_CONFIG_PATH               "path"
 559 #define ZPOOL_CONFIG_DEVID              "devid"
 560 #define ZPOOL_CONFIG_METASLAB_ARRAY     "metaslab_array"
 561 #define ZPOOL_CONFIG_METASLAB_SHIFT     "metaslab_shift"
 562 #define ZPOOL_CONFIG_ASHIFT             "ashift"
 563 #define ZPOOL_CONFIG_ASIZE              "asize"
 564 #define ZPOOL_CONFIG_DTL                "DTL"
 565 #define ZPOOL_CONFIG_SCAN_STATS         "scan_stats"    /* not stored on disk */
 566 #define ZPOOL_CONFIG_REMOVAL_STATS      "removal_stats" /* not stored on disk */
 567 #define ZPOOL_CONFIG_CHECKPOINT_STATS   "checkpoint_stats" /* not on disk */
 568 #define ZPOOL_CONFIG_VDEV_STATS         "vdev_stats"    /* not stored on disk */
 569 #define ZPOOL_CONFIG_INDIRECT_SIZE      "indirect_size" /* not stored on disk */
 570 #define ZPOOL_CONFIG_WHOLE_DISK         "whole_disk"
 571 #define ZPOOL_CONFIG_ERRCOUNT           "error_count"
 572 #define ZPOOL_CONFIG_NOT_PRESENT        "not_present"
 573 #define ZPOOL_CONFIG_SPARES             "spares"
 574 #define ZPOOL_CONFIG_IS_SPARE           "is_spare"
 575 #define ZPOOL_CONFIG_NPARITY            "nparity"
 576 #define ZPOOL_CONFIG_HOSTID             "hostid"
 577 #define ZPOOL_CONFIG_HOSTNAME           "hostname"
 578 #define ZPOOL_CONFIG_LOADED_TIME        "initial_load_time"
 579 #define ZPOOL_CONFIG_UNSPARE            "unspare"
 580 #define ZPOOL_CONFIG_PHYS_PATH          "phys_path"
 581 #define ZPOOL_CONFIG_IS_LOG             "is_log"
 582 #define ZPOOL_CONFIG_L2CACHE            "l2cache"
 583 #define ZPOOL_CONFIG_HOLE_ARRAY         "hole_array"
 584 #define ZPOOL_CONFIG_VDEV_CHILDREN      "vdev_children"
 585 #define ZPOOL_CONFIG_IS_HOLE            "is_hole"
 586 #define ZPOOL_CONFIG_DDT_HISTOGRAM      "ddt_histogram"
 587 #define ZPOOL_CONFIG_DDT_OBJ_STATS      "ddt_object_stats"
 588 #define ZPOOL_CONFIG_DDT_STATS          "ddt_stats"
 589 #define ZPOOL_CONFIG_SPLIT              "splitcfg"
 590 #define ZPOOL_CONFIG_ORIG_GUID          "orig_guid"
 591 #define ZPOOL_CONFIG_SPLIT_GUID         "split_guid"
 592 #define ZPOOL_CONFIG_SPLIT_LIST         "guid_list"
 593 #define ZPOOL_CONFIG_REMOVING           "removing"
 594 #define ZPOOL_CONFIG_RESILVER_TXG       "resilver_txg"
 595 #define ZPOOL_CONFIG_COMMENT            "comment"
 596 #define ZPOOL_CONFIG_SUSPENDED          "suspended"     /* not stored on disk */
 597 #define ZPOOL_CONFIG_SUSPENDED_REASON   "suspended_reason"      /* not stored */
 598 #define ZPOOL_CONFIG_TIMESTAMP          "timestamp"     /* not stored on disk */
 599 #define ZPOOL_CONFIG_BOOTFS             "bootfs"        /* not stored on disk */
 600 #define ZPOOL_CONFIG_MISSING_DEVICES    "missing_vdevs" /* not stored on disk */
 601 #define ZPOOL_CONFIG_LOAD_INFO          "load_info"     /* not stored on disk */
 602 #define ZPOOL_CONFIG_REWIND_INFO        "rewind_info"   /* not stored on disk */
 603 #define ZPOOL_CONFIG_UNSUP_FEAT         "unsup_feat"    /* not stored on disk */
 604 #define ZPOOL_CONFIG_ENABLED_FEAT       "enabled_feat"  /* not stored on disk */
 605 #define ZPOOL_CONFIG_CAN_RDONLY         "can_rdonly"    /* not stored on disk */
 606 #define ZPOOL_CONFIG_FEATURES_FOR_READ  "features_for_read"
 607 #define ZPOOL_CONFIG_FEATURE_STATS      "feature_stats" /* not stored on disk */
 608 #define ZPOOL_CONFIG_VDEV_TOP_ZAP       "com.delphix:vdev_zap_top"
 609 #define ZPOOL_CONFIG_VDEV_LEAF_ZAP      "com.delphix:vdev_zap_leaf"
 610 #define ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS  "com.delphix:has_per_vdev_zaps"
 611 #define ZPOOL_CONFIG_CACHEFILE          "cachefile"     /* not stored on disk */
 612 #define ZPOOL_CONFIG_MMP_STATE          "mmp_state"     /* not stored on disk */
 613 #define ZPOOL_CONFIG_MMP_TXG            "mmp_txg"       /* not stored on disk */
 614 #define ZPOOL_CONFIG_MMP_SEQ            "mmp_seq"       /* not stored on disk */
 615 #define ZPOOL_CONFIG_MMP_HOSTNAME       "mmp_hostname"  /* not stored on disk */
 616 #define ZPOOL_CONFIG_MMP_HOSTID         "mmp_hostid"    /* not stored on disk */
 617 #define ZPOOL_CONFIG_ALLOCATION_BIAS    "alloc_bias"    /* not stored on disk */
 618
 619 /*
 620  * The persistent vdev state is stored as separate values rather than a single
 621  * 'vdev_state' entry.  This is because a device can be in multiple states, such
 622  * as offline and degraded.
 623  */
 624 #define ZPOOL_CONFIG_OFFLINE            "offline"
 625 #define ZPOOL_CONFIG_FAULTED            "faulted"
 626 #define ZPOOL_CONFIG_DEGRADED           "degraded"
 627 #define ZPOOL_CONFIG_REMOVED            "removed"
 628 #define ZPOOL_CONFIG_FRU                "fru"
 629 #define ZPOOL_CONFIG_AUX_STATE          "aux_state"
 630
 631 /* Pool load policy parameters */
 632 #define ZPOOL_LOAD_POLICY               "load-policy"
 633 #define ZPOOL_LOAD_REWIND_POLICY        "load-rewind-policy"
 634 #define ZPOOL_LOAD_REQUEST_TXG          "load-request-txg"
 635 #define ZPOOL_LOAD_META_THRESH          "load-meta-thresh"
 636 #define ZPOOL_LOAD_DATA_THRESH          "load-data-thresh"
 637
 638 /* Rewind data discovered */
 639 #define ZPOOL_CONFIG_LOAD_TIME          "rewind_txg_ts"
 640 #define ZPOOL_CONFIG_LOAD_DATA_ERRORS   "verify_data_errors"
 641 #define ZPOOL_CONFIG_REWIND_TIME        "seconds_of_rewind"
 642
 643 #define VDEV_TYPE_ROOT                  "root"
 644 #define VDEV_TYPE_MIRROR                "mirror"
 645 #define VDEV_TYPE_REPLACING             "replacing"
 646 #define VDEV_TYPE_RAIDZ                 "raidz"
 647 #define VDEV_TYPE_DISK                  "disk"
 648 #define VDEV_TYPE_FILE                  "file"
 649 #define VDEV_TYPE_MISSING               "missing"
 650 #define VDEV_TYPE_HOLE                  "hole"
 651 #define VDEV_TYPE_SPARE                 "spare"
 652 #define VDEV_TYPE_LOG                   "log"
 653 #define VDEV_TYPE_L2CACHE               "l2cache"
 654 #define VDEV_TYPE_INDIRECT              "indirect"
 655
 656 /* VDEV_TOP_ZAP_* are used in top-level vdev ZAP objects. */
 657 #define VDEV_TOP_ZAP_INDIRECT_OBSOLETE_SM \
 658         "com.delphix:indirect_obsolete_sm"
 659 #define VDEV_TOP_ZAP_OBSOLETE_COUNTS_ARE_PRECISE \
 660         "com.delphix:obsolete_counts_are_precise"
 661 #define VDEV_TOP_ZAP_POOL_CHECKPOINT_SM \
 662         "com.delphix:pool_checkpoint_sm"
 663
 664 #define VDEV_TOP_ZAP_ALLOCATION_BIAS \
 665         "org.zfsonlinux:allocation_bias"
 666
 667 /* vdev metaslab allocation bias */
 668 #define VDEV_ALLOC_BIAS_LOG             "log"
 669 #define VDEV_ALLOC_BIAS_SPECIAL         "special"
 670 #define VDEV_ALLOC_BIAS_DEDUP           "dedup"
 671
 672 #define VDEV_LEAF_ZAP_INITIALIZE_LAST_OFFSET    \
 673         "com.delphix:next_offset_to_initialize"
 674 #define VDEV_LEAF_ZAP_INITIALIZE_STATE  \
 675         "com.delphix:vdev_initialize_state"
 676 #define VDEV_LEAF_ZAP_INITIALIZE_ACTION_TIME    \
 677         "com.delphix:vdev_initialize_action_time"
 678
 679 /*
 680  * This is needed in userland to report the minimum necessary device size.
 681  *
 682  * Note that the zfs test suite uses 64MB vdevs.
 683  */
 684 #define SPA_MINDEVSIZE          (64ULL << 20)
 685
 686 /*
 687  * Set if the fragmentation has not yet been calculated. This can happen
 688  * because the space maps have not been upgraded or the histogram feature
 689  * is not enabled.
 690  */
 691 #define ZFS_FRAG_INVALID        UINT64_MAX
 692
 693 /*
 694  * The location of the pool configuration repository, shared between kernel and
 695  * userland.
 696  */
 697 #define ZPOOL_CACHE             "/boot/zfs/zpool.cache"
 698
 699 /*
 700  * vdev states are ordered from least to most healthy.
 701  * A vdev that's CANT_OPEN or below is considered unusable.
 702  */
 703 typedef enum vdev_state {
 704         VDEV_STATE_UNKNOWN = 0, /* Uninitialized vdev                   */
 705         VDEV_STATE_CLOSED,      /* Not currently open                   */
 706         VDEV_STATE_OFFLINE,     /* Not allowed to open                  */
 707         VDEV_STATE_REMOVED,     /* Explicitly removed from system       */
 708         VDEV_STATE_CANT_OPEN,   /* Tried to open, but failed            */
 709         VDEV_STATE_FAULTED,     /* External request to fault device     */
 710         VDEV_STATE_DEGRADED,    /* Replicated vdev with unhealthy kids  */
 711         VDEV_STATE_HEALTHY      /* Presumed good                        */
 712 } vdev_state_t;
 713
 714 #define VDEV_STATE_ONLINE       VDEV_STATE_HEALTHY
 715
 716 /*
 717  * vdev aux states.  When a vdev is in the CANT_OPEN state, the aux field
 718  * of the vdev stats structure uses these constants to distinguish why.
 719  */
 720 typedef enum vdev_aux {
 721         VDEV_AUX_NONE,          /* no error                             */
 722         VDEV_AUX_OPEN_FAILED,   /* ldi_open_*() or vn_open() failed     */
 723         VDEV_AUX_CORRUPT_DATA,  /* bad label or disk contents           */
 724         VDEV_AUX_NO_REPLICAS,   /* insufficient number of replicas      */
 725         VDEV_AUX_BAD_GUID_SUM,  /* vdev guid sum doesn't match          */
 726         VDEV_AUX_TOO_SMALL,     /* vdev size is too small               */
 727         VDEV_AUX_BAD_LABEL,     /* the label is OK but invalid          */
 728         VDEV_AUX_VERSION_NEWER, /* on-disk version is too new           */
 729         VDEV_AUX_VERSION_OLDER, /* on-disk version is too old           */
 730         VDEV_AUX_UNSUP_FEAT,    /* unsupported features                 */
 731         VDEV_AUX_SPARED,        /* hot spare used in another pool       */
 732         VDEV_AUX_ERR_EXCEEDED,  /* too many errors                      */
 733         VDEV_AUX_IO_FAILURE,    /* experienced I/O failure              */
 734         VDEV_AUX_BAD_LOG,       /* cannot read log chain(s)             */
 735         VDEV_AUX_EXTERNAL,      /* external diagnosis                   */
 736         VDEV_AUX_SPLIT_POOL,    /* vdev was split off into another pool */
 737         VDEV_AUX_ASHIFT_TOO_BIG, /* vdev's min block size is too large   */
 738         VDEV_AUX_CHILDREN_OFFLINE, /* all children are offline          */
 739         VDEV_AUX_ACTIVE         /* vdev active on a different host      */
 740 } vdev_aux_t;
 741
 742 /*
 743  * pool state.  The following states are written to disk as part of the normal
 744  * SPA lifecycle: ACTIVE, EXPORTED, DESTROYED, SPARE, L2CACHE.  The remaining
 745  * states are software abstractions used at various levels to communicate
 746  * pool state.
 747  */
 748 typedef enum pool_state {
 749         POOL_STATE_ACTIVE = 0,          /* In active use                */
 750         POOL_STATE_EXPORTED,            /* Explicitly exported          */
 751         POOL_STATE_DESTROYED,           /* Explicitly destroyed         */
 752         POOL_STATE_SPARE,               /* Reserved for hot spare use   */
 753         POOL_STATE_L2CACHE,             /* Level 2 ARC device           */
 754         POOL_STATE_UNINITIALIZED,       /* Internal spa_t state         */
 755         POOL_STATE_UNAVAIL,             /* Internal libzfs state        */
 756         POOL_STATE_POTENTIALLY_ACTIVE   /* Internal libzfs state        */
 757 } pool_state_t;
 758
 759 /*
 760  * mmp state. The following states provide additional detail describing
 761  * why a pool couldn't be safely imported.
 762  */
 763 typedef enum mmp_state {
 764         MMP_STATE_ACTIVE = 0,           /* In active use                */
 765         MMP_STATE_INACTIVE,             /* Inactive and safe to import  */
 766         MMP_STATE_NO_HOSTID             /* System hostid is not set     */
 767 } mmp_state_t;
 768
 769 /*
 770  * Scan Functions.
 771  */
 772 typedef enum pool_scan_func {
 773         POOL_SCAN_NONE,
 774         POOL_SCAN_SCRUB,
 775         POOL_SCAN_RESILVER,
 776         POOL_SCAN_FUNCS
 777 } pool_scan_func_t;
 778
 779 /*
 780  * Used to control scrub pause and resume.
 781  */
 782 typedef enum pool_scrub_cmd {
 783         POOL_SCRUB_NORMAL = 0,
 784         POOL_SCRUB_PAUSE,
 785         POOL_SCRUB_FLAGS_END
 786 } pool_scrub_cmd_t;
 787
 788 /*
 789  * Initialize functions.
 790  */
 791 typedef enum pool_initialize_func {
 792         POOL_INITIALIZE_DO,
 793         POOL_INITIALIZE_CANCEL,
 794         POOL_INITIALIZE_SUSPEND,
 795         POOL_INITIALIZE_FUNCS
 796 } pool_initialize_func_t;
 797
 798 /*
 799  * ZIO types.  Needed to interpret vdev statistics below.
 800  */
 801 typedef enum zio_type {
 802         ZIO_TYPE_NULL = 0,
 803         ZIO_TYPE_READ,
 804         ZIO_TYPE_WRITE,
 805         ZIO_TYPE_FREE,
 806         ZIO_TYPE_CLAIM,
 807         ZIO_TYPE_IOCTL,
 808         ZIO_TYPES
 809 } zio_type_t;
 810
 811 /*
 812  * Pool statistics.  Note: all fields should be 64-bit because this
 813  * is passed between kernel and userland as an nvlist uint64 array.
 814  */
 815 typedef struct pool_scan_stat {
 816         /* values stored on disk */
 817         uint64_t        pss_func;       /* pool_scan_func_t */
 818         uint64_t        pss_state;      /* dsl_scan_state_t */
 819         uint64_t        pss_start_time; /* scan start time */
 820         uint64_t        pss_end_time;   /* scan end time */
 821         uint64_t        pss_to_examine; /* total bytes to scan */
 822         uint64_t        pss_examined;   /* total bytes located by scanner */
 823         uint64_t        pss_to_process; /* total bytes to process */
 824         uint64_t        pss_processed;  /* total processed bytes */
 825         uint64_t        pss_errors;     /* scan errors  */
 826
 827         /* values not stored on disk */
 828         uint64_t        pss_pass_exam;  /* examined bytes per scan pass */
 829         uint64_t        pss_pass_start; /* start time of a scan pass */
 830         uint64_t        pss_pass_scrub_pause; /* pause time of a scurb pass */
 831         /* cumulative time scrub spent paused, needed for rate calculation */
 832         uint64_t        pss_pass_scrub_spent_paused;
 833
 834         /* Sorted scrubbing new fields */
 835         /* Stored on disk */
 836         uint64_t        pss_issued;     /* total bytes checked by scanner */
 837         /* Not stored on disk */
 838         uint64_t        pss_pass_issued;        /* issued bytes per scan pass */
 839 } pool_scan_stat_t;
 840
 841 typedef struct pool_removal_stat {
 842         uint64_t prs_state; /* dsl_scan_state_t */
 843         uint64_t prs_removing_vdev;
 844         uint64_t prs_start_time;
 845         uint64_t prs_end_time;
 846         uint64_t prs_to_copy; /* bytes that need to be copied */
 847         uint64_t prs_copied; /* bytes copied so far */
 848         /*
 849          * bytes of memory used for indirect mappings.
 850          * This includes all removed vdevs.
 851          */
 852         uint64_t prs_mapping_memory;
 853 } pool_removal_stat_t;
 854
 855 typedef enum dsl_scan_state {
 856         DSS_NONE,
 857         DSS_SCANNING,
 858         DSS_FINISHED,
 859         DSS_CANCELED,
 860         DSS_NUM_STATES
 861 } dsl_scan_state_t;
 862
 863 typedef enum {
 864         CS_NONE,
 865         CS_CHECKPOINT_EXISTS,
 866         CS_CHECKPOINT_DISCARDING,
 867         CS_NUM_STATES
 868 } checkpoint_state_t;
 869
 870 typedef struct pool_checkpoint_stat {
 871         uint64_t pcs_state;             /* checkpoint_state_t */
 872         uint64_t pcs_start_time;        /* time checkpoint/discard started */
 873         uint64_t pcs_space;             /* checkpointed space */
 874 } pool_checkpoint_stat_t;
 875
 876 typedef enum {
 877         VDEV_INITIALIZE_NONE,
 878         VDEV_INITIALIZE_ACTIVE,
 879         VDEV_INITIALIZE_CANCELED,
 880         VDEV_INITIALIZE_SUSPENDED,
 881         VDEV_INITIALIZE_COMPLETE
 882 } vdev_initializing_state_t;
 883
 884 /*
 885  * nvlist name constants. Facilitate restricting snapshot iteration range for
 886  * the "list next snapshot" ioctl
 887  */
 888 #define SNAP_ITER_MIN_TXG       "snap_iter_min_txg"
 889 #define SNAP_ITER_MAX_TXG       "snap_iter_max_txg"
 890
 891 /*
 892  * Vdev statistics.  Note: all fields should be 64-bit because this
 893  * is passed between kernel and userland as an nvlist uint64 array.
 894  */
 895 typedef struct vdev_stat {
 896         hrtime_t        vs_timestamp;           /* time since vdev load */
 897         uint64_t        vs_state;               /* vdev state           */
 898         uint64_t        vs_aux;                 /* see vdev_aux_t       */
 899         uint64_t        vs_alloc;               /* space allocated      */
 900         uint64_t        vs_space;               /* total capacity       */
 901         uint64_t        vs_dspace;              /* deflated capacity    */
 902         uint64_t        vs_rsize;               /* replaceable dev size */
 903         uint64_t        vs_esize;               /* expandable dev size */
 904         uint64_t        vs_ops[ZIO_TYPES];      /* operation count      */
 905         uint64_t        vs_bytes[ZIO_TYPES];    /* bytes read/written   */
 906         uint64_t        vs_read_errors;         /* read errors          */
 907         uint64_t        vs_write_errors;        /* write errors         */
 908         uint64_t        vs_checksum_errors;     /* checksum errors      */
 909         uint64_t        vs_self_healed;         /* self-healed bytes    */
 910         uint64_t        vs_scan_removing;       /* removing?    */
 911         uint64_t        vs_scan_processed;      /* scan processed bytes */
 912         uint64_t        vs_configured_ashift;   /* TLV vdev_ashift      */
 913         uint64_t        vs_logical_ashift;      /* vdev_logical_ashift  */
 914         uint64_t        vs_physical_ashift;     /* vdev_physical_ashift */
 915         uint64_t        vs_fragmentation;       /* device fragmentation */
 916         uint64_t        vs_checkpoint_space;    /* checkpoint-consumed space */
 917         uint64_t        vs_initialize_errors;   /* initializing errors  */
 918         uint64_t        vs_initialize_bytes_done; /* bytes initialized */
 919         uint64_t        vs_initialize_bytes_est; /* total bytes to initialize */
 920         uint64_t        vs_initialize_state;    /* vdev_initialzing_state_t */
 921         uint64_t        vs_initialize_action_time; /* time_t */
 922 } vdev_stat_t;
 923 #define VDEV_STAT_VALID(field, uint64_t_field_count) \
 924     ((uint64_t_field_count * sizeof(uint64_t)) >= \
 925      (offsetof(vdev_stat_t, field) + sizeof(((vdev_stat_t *)NULL)->field)))
 926
 927 /*
 928  * DDT statistics.  Note: all fields should be 64-bit because this
 929  * is passed between kernel and userland as an nvlist uint64 array.
 930  */
 931 typedef struct ddt_object {
 932         uint64_t        ddo_count;      /* number of elments in ddt     */
 933         uint64_t        ddo_dspace;     /* size of ddt on disk          */
 934         uint64_t        ddo_mspace;     /* size of ddt in-core          */
 935 } ddt_object_t;
 936
 937 typedef struct ddt_stat {
 938         uint64_t        dds_blocks;     /* blocks                       */
 939         uint64_t        dds_lsize;      /* logical size                 */
 940         uint64_t        dds_psize;      /* physical size                */
 941         uint64_t        dds_dsize;      /* deflated allocated size      */
 942         uint64_t        dds_ref_blocks; /* referenced blocks            */
 943         uint64_t        dds_ref_lsize;  /* referenced lsize * refcnt    */
 944         uint64_t        dds_ref_psize;  /* referenced psize * refcnt    */
 945         uint64_t        dds_ref_dsize;  /* referenced dsize * refcnt    */
 946 } ddt_stat_t;
 947
 948 typedef struct ddt_histogram {
 949         ddt_stat_t      ddh_stat[64];   /* power-of-two histogram buckets */
 950 } ddt_histogram_t;
 951
 952 #define ZVOL_DRIVER     "zvol"
 953 #define ZFS_DRIVER      "zfs"
 954 #define ZFS_DEV_NAME    "zfs"
 955 #define ZFS_DEV         "/dev/" ZFS_DEV_NAME
 956 #define ZFS_DISK_ROOT   "/dev/dsk"
 957 #define ZFS_DISK_ROOTD  ZFS_DISK_ROOT "/"
 958 #define ZFS_RDISK_ROOT  "/dev/rdsk"
 959 #define ZFS_RDISK_ROOTD ZFS_RDISK_ROOT "/"
 960
 961 /* general zvol path */
 962 #define ZVOL_DIR                "/dev/zvol"
 963 /* expansion */
 964 #define ZVOL_PSEUDO_DEV         "/devices/pseudo/zfs@0:"
 965 /* for dump and swap */
 966 #define ZVOL_FULL_DEV_DIR       ZVOL_DIR "/dsk/"
 967 #define ZVOL_FULL_RDEV_DIR      ZVOL_DIR "/rdsk/"
 968
 969 #define ZVOL_PROP_NAME          "name"
 970 #define ZVOL_DEFAULT_BLOCKSIZE  8192
 971
 972 /*
 973  * /dev/zfs ioctl numbers.
 974  */
 975 typedef enum zfs_ioc {
 976         ZFS_IOC_FIRST = 0,
 977         ZFS_IOC_POOL_CREATE = ZFS_IOC_FIRST,
 978         ZFS_IOC_POOL_DESTROY,
 979         ZFS_IOC_POOL_IMPORT,
 980         ZFS_IOC_POOL_EXPORT,
 981         ZFS_IOC_POOL_CONFIGS,
 982         ZFS_IOC_POOL_STATS,
 983         ZFS_IOC_POOL_TRYIMPORT,
 984         ZFS_IOC_POOL_SCAN,
 985         ZFS_IOC_POOL_FREEZE,
 986         ZFS_IOC_POOL_UPGRADE,
 987         ZFS_IOC_POOL_GET_HISTORY,
 988         ZFS_IOC_VDEV_ADD,
 989         ZFS_IOC_VDEV_REMOVE,
 990         ZFS_IOC_VDEV_SET_STATE,
 991         ZFS_IOC_VDEV_ATTACH,
 992         ZFS_IOC_VDEV_DETACH,
 993         ZFS_IOC_VDEV_SETPATH,
 994         ZFS_IOC_VDEV_SETFRU,
 995         ZFS_IOC_OBJSET_STATS,
 996         ZFS_IOC_OBJSET_ZPLPROPS,
 997         ZFS_IOC_DATASET_LIST_NEXT,
 998         ZFS_IOC_SNAPSHOT_LIST_NEXT,
 999         ZFS_IOC_SET_PROP,
1000         ZFS_IOC_CREATE,
1001         ZFS_IOC_DESTROY,
1002         ZFS_IOC_ROLLBACK,
1003         ZFS_IOC_RENAME,
1004         ZFS_IOC_RECV,
1005         ZFS_IOC_SEND,
1006         ZFS_IOC_INJECT_FAULT,
1007         ZFS_IOC_CLEAR_FAULT,
1008         ZFS_IOC_INJECT_LIST_NEXT,
1009         ZFS_IOC_ERROR_LOG,
1010         ZFS_IOC_CLEAR,
1011         ZFS_IOC_PROMOTE,
1012         ZFS_IOC_DESTROY_SNAPS,
1013         ZFS_IOC_SNAPSHOT,
1014         ZFS_IOC_DSOBJ_TO_DSNAME,
1015         ZFS_IOC_OBJ_TO_PATH,
1016         ZFS_IOC_POOL_SET_PROPS,
1017         ZFS_IOC_POOL_GET_PROPS,
1018         ZFS_IOC_SET_FSACL,
1019         ZFS_IOC_GET_FSACL,
1020         ZFS_IOC_SHARE,
1021         ZFS_IOC_INHERIT_PROP,
1022         ZFS_IOC_SMB_ACL,
1023         ZFS_IOC_USERSPACE_ONE,
1024         ZFS_IOC_USERSPACE_MANY,
1025         ZFS_IOC_USERSPACE_UPGRADE,
1026         ZFS_IOC_HOLD,
1027         ZFS_IOC_RELEASE,
1028         ZFS_IOC_GET_HOLDS,
1029         ZFS_IOC_OBJSET_RECVD_PROPS,
1030         ZFS_IOC_VDEV_SPLIT,
1031         ZFS_IOC_NEXT_OBJ,
1032         ZFS_IOC_DIFF,
1033         ZFS_IOC_TMP_SNAPSHOT,
1034         ZFS_IOC_OBJ_TO_STATS,
1035         ZFS_IOC_JAIL,
1036         ZFS_IOC_UNJAIL,
1037         ZFS_IOC_POOL_REGUID,
1038         ZFS_IOC_SPACE_WRITTEN,
1039         ZFS_IOC_SPACE_SNAPS,
1040         ZFS_IOC_SEND_PROGRESS,
1041         ZFS_IOC_POOL_REOPEN,
1042         ZFS_IOC_LOG_HISTORY,
1043         ZFS_IOC_SEND_NEW,
1044         ZFS_IOC_SEND_SPACE,
1045         ZFS_IOC_CLONE,
1046         ZFS_IOC_BOOKMARK,
1047         ZFS_IOC_GET_BOOKMARKS,
1048         ZFS_IOC_DESTROY_BOOKMARKS,
1049 #ifdef __FreeBSD__
1050         ZFS_IOC_NEXTBOOT,
1051 #endif
1052         ZFS_IOC_CHANNEL_PROGRAM,
1053         ZFS_IOC_REMAP,
1054         ZFS_IOC_POOL_CHECKPOINT,
1055         ZFS_IOC_POOL_DISCARD_CHECKPOINT,
1056         ZFS_IOC_POOL_INITIALIZE,
1057         ZFS_IOC_POOL_SYNC,
1058         ZFS_IOC_LAST
1059 } zfs_ioc_t;
1060
1061 /*
1062  * ZFS-specific error codes used for returning descriptive errors
1063  * to the userland through zfs ioctls.
1064  *
1065  * The enum implicitly includes all the error codes from errno.h.
1066  * New code should use and extend this enum for errors that are
1067  * not described precisely by generic errno codes.
1068  */
1069 typedef enum {
1070         ZFS_ERR_CHECKPOINT_EXISTS = 1024,
1071         ZFS_ERR_DISCARDING_CHECKPOINT,
1072         ZFS_ERR_NO_CHECKPOINT,
1073         ZFS_ERR_DEVRM_IN_PROGRESS,
1074         ZFS_ERR_VDEV_TOO_BIG,
1075         ZFS_ERR_WRONG_PARENT,
1076 } zfs_errno_t;
1077
1078 /*
1079  * Internal SPA load state.  Used by FMA diagnosis engine.
1080  */
1081 typedef enum {
1082         SPA_LOAD_NONE,          /* no load in progress  */
1083         SPA_LOAD_OPEN,          /* normal open          */
1084         SPA_LOAD_IMPORT,        /* import in progress   */
1085         SPA_LOAD_TRYIMPORT,     /* tryimport in progress */
1086         SPA_LOAD_RECOVER,       /* recovery requested   */
1087         SPA_LOAD_ERROR,         /* load failed          */
1088         SPA_LOAD_CREATE         /* creation in progress */
1089 } spa_load_state_t;
1090
1091 /*
1092  * Bookmark name values.
1093  */
1094 #define ZPOOL_ERR_LIST          "error list"
1095 #define ZPOOL_ERR_DATASET       "dataset"
1096 #define ZPOOL_ERR_OBJECT        "object"
1097
1098 #define HIS_MAX_RECORD_LEN      (MAXPATHLEN + MAXPATHLEN + 1)
1099
1100 /*
1101  * The following are names used in the nvlist describing
1102  * the pool's history log.
1103  */
1104 #define ZPOOL_HIST_RECORD       "history record"
1105 #define ZPOOL_HIST_TIME         "history time"
1106 #define ZPOOL_HIST_CMD          "history command"
1107 #define ZPOOL_HIST_WHO          "history who"
1108 #define ZPOOL_HIST_ZONE         "history zone"
1109 #define ZPOOL_HIST_HOST         "history hostname"
1110 #define ZPOOL_HIST_TXG          "history txg"
1111 #define ZPOOL_HIST_INT_EVENT    "history internal event"
1112 #define ZPOOL_HIST_INT_STR      "history internal str"
1113 #define ZPOOL_HIST_INT_NAME     "internal_name"
1114 #define ZPOOL_HIST_IOCTL        "ioctl"
1115 #define ZPOOL_HIST_INPUT_NVL    "in_nvl"
1116 #define ZPOOL_HIST_OUTPUT_NVL   "out_nvl"
1117 #define ZPOOL_HIST_DSNAME       "dsname"
1118 #define ZPOOL_HIST_DSID         "dsid"
1119 #define ZPOOL_HIST_ERRNO        "errno"
1120
1121 /*
1122  * The following are names used when invoking ZFS_IOC_POOL_INITIALIZE.
1123  */
1124 #define ZPOOL_INITIALIZE_COMMAND        "initialize_command"
1125 #define ZPOOL_INITIALIZE_VDEVS          "initialize_vdevs"
1126
1127 /*
1128  * Flags for ZFS_IOC_VDEV_SET_STATE
1129  */
1130 #define ZFS_ONLINE_CHECKREMOVE  0x1
1131 #define ZFS_ONLINE_UNSPARE      0x2
1132 #define ZFS_ONLINE_FORCEFAULT   0x4
1133 #define ZFS_ONLINE_EXPAND       0x8
1134 #define ZFS_OFFLINE_TEMPORARY   0x1
1135
1136 /*
1137  * Flags for ZFS_IOC_POOL_IMPORT
1138  */
1139 #define ZFS_IMPORT_NORMAL       0x0
1140 #define ZFS_IMPORT_VERBATIM     0x1
1141 #define ZFS_IMPORT_ANY_HOST     0x2
1142 #define ZFS_IMPORT_MISSING_LOG  0x4
1143 #define ZFS_IMPORT_ONLY         0x8
1144 #define ZFS_IMPORT_CHECKPOINT   0x10
1145 #define ZFS_IMPORT_TEMP_NAME    0x20
1146 #define ZFS_IMPORT_SKIP_MMP     0x40
1147
1148 /*
1149  * Channel program argument/return nvlist keys and defaults.
1150  */
1151 #define ZCP_ARG_PROGRAM         "program"
1152 #define ZCP_ARG_ARGLIST         "arg"
1153 #define ZCP_ARG_SYNC            "sync"
1154 #define ZCP_ARG_INSTRLIMIT      "instrlimit"
1155 #define ZCP_ARG_MEMLIMIT        "memlimit"
1156
1157 #define ZCP_ARG_CLIARGV         "argv"
1158
1159 #define ZCP_RET_ERROR           "error"
1160 #define ZCP_RET_RETURN          "return"
1161
1162 #define ZCP_DEFAULT_INSTRLIMIT  (10 * 1000 * 1000)
1163 #define ZCP_MAX_INSTRLIMIT      (10 * ZCP_DEFAULT_INSTRLIMIT)
1164 #define ZCP_DEFAULT_MEMLIMIT    (10 * 1024 * 1024)
1165 #define ZCP_MAX_MEMLIMIT        (10 * ZCP_DEFAULT_MEMLIMIT)
1166
1167 /*
1168  * Sysevent payload members.  ZFS will generate the following sysevents with the
1169  * given payloads:
1170  *
1171  *      ESC_ZFS_RESILVER_START
1172  *      ESC_ZFS_RESILVER_END
1173  *      ESC_ZFS_POOL_DESTROY
1174  *      ESC_ZFS_POOL_REGUID
1175  *
1176  *              ZFS_EV_POOL_NAME        DATA_TYPE_STRING
1177  *              ZFS_EV_POOL_GUID        DATA_TYPE_UINT64
1178  *
1179  *      ESC_ZFS_VDEV_REMOVE
1180  *      ESC_ZFS_VDEV_CLEAR
1181  *      ESC_ZFS_VDEV_CHECK
1182  *
1183  *              ZFS_EV_POOL_NAME        DATA_TYPE_STRING
1184  *              ZFS_EV_POOL_GUID        DATA_TYPE_UINT64
1185  *              ZFS_EV_VDEV_PATH        DATA_TYPE_STRING        (optional)
1186  *              ZFS_EV_VDEV_GUID        DATA_TYPE_UINT64
1187  *
1188  *      ESC_ZFS_HISTORY_EVENT
1189  *
1190  *              ZFS_EV_POOL_NAME        DATA_TYPE_STRING
1191  *              ZFS_EV_POOL_GUID        DATA_TYPE_UINT64
1192  *              ZFS_EV_HIST_TIME        DATA_TYPE_UINT64        (optional)
1193  *              ZFS_EV_HIST_CMD         DATA_TYPE_STRING        (optional)
1194  *              ZFS_EV_HIST_WHO         DATA_TYPE_UINT64        (optional)
1195  *              ZFS_EV_HIST_ZONE        DATA_TYPE_STRING        (optional)
1196  *              ZFS_EV_HIST_HOST        DATA_TYPE_STRING        (optional)
1197  *              ZFS_EV_HIST_TXG         DATA_TYPE_UINT64        (optional)
1198  *              ZFS_EV_HIST_INT_EVENT   DATA_TYPE_UINT64        (optional)
1199  *              ZFS_EV_HIST_INT_STR     DATA_TYPE_STRING        (optional)
1200  *              ZFS_EV_HIST_INT_NAME    DATA_TYPE_STRING        (optional)
1201  *              ZFS_EV_HIST_IOCTL       DATA_TYPE_STRING        (optional)
1202  *              ZFS_EV_HIST_DSNAME      DATA_TYPE_STRING        (optional)
1203  *              ZFS_EV_HIST_DSID        DATA_TYPE_UINT64        (optional)
1204  *
1205  * The ZFS_EV_HIST_* members will correspond to the ZPOOL_HIST_* members in the
1206  * history log nvlist.  The keynames will be free of any spaces or other
1207  * characters that could be potentially unexpected to consumers of the
1208  * sysevents.
1209  */
1210 #define ZFS_EV_POOL_NAME        "pool_name"
1211 #define ZFS_EV_POOL_GUID        "pool_guid"
1212 #define ZFS_EV_VDEV_PATH        "vdev_path"
1213 #define ZFS_EV_VDEV_GUID        "vdev_guid"
1214 #define ZFS_EV_HIST_TIME        "history_time"
1215 #define ZFS_EV_HIST_CMD         "history_command"
1216 #define ZFS_EV_HIST_WHO         "history_who"
1217 #define ZFS_EV_HIST_ZONE        "history_zone"
1218 #define ZFS_EV_HIST_HOST        "history_hostname"
1219 #define ZFS_EV_HIST_TXG         "history_txg"
1220 #define ZFS_EV_HIST_INT_EVENT   "history_internal_event"
1221 #define ZFS_EV_HIST_INT_STR     "history_internal_str"
1222 #define ZFS_EV_HIST_INT_NAME    "history_internal_name"
1223 #define ZFS_EV_HIST_IOCTL       "history_ioctl"
1224 #define ZFS_EV_HIST_DSNAME      "history_dsname"
1225 #define ZFS_EV_HIST_DSID        "history_dsid"
1226
1227 #ifdef  __cplusplus
1228 }
1229 #endif
1230
1231 #endif  /* _SYS_FS_ZFS_H */