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) 2012 by Delphix. All rights reserved.
  25  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  26  */
  27
  28 /* Portions Copyright 2010 Robert Milkowski */
  29
  30 #ifndef _SYS_FS_ZFS_H
  31 #define _SYS_FS_ZFS_H
  32
  33 #include <sys/time.h>
  34
  35 #ifdef  __cplusplus
  36 extern "C" {
  37 #endif
  38
  39 /*
  40  * Types and constants shared between userland and the kernel.
  41  */
  42
  43 /*
  44  * Each dataset can be one of the following types.  These constants can be
  45  * combined into masks that can be passed to various functions.
  46  */
  47 typedef enum {
  48         ZFS_TYPE_FILESYSTEM     = 0x1,
  49         ZFS_TYPE_SNAPSHOT       = 0x2,
  50         ZFS_TYPE_VOLUME         = 0x4,
  51         ZFS_TYPE_POOL           = 0x8
  52 } zfs_type_t;
  53
  54 #define ZFS_TYPE_DATASET        \
  55         (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME | ZFS_TYPE_SNAPSHOT)
  56
  57 #define ZAP_MAXNAMELEN 256
  58 #define ZAP_MAXVALUELEN (1024 * 8)
  59 #define ZAP_OLDMAXVALUELEN 1024
  60
  61 /*
  62  * Dataset properties are identified by these constants and must be added to
  63  * the end of this list to ensure that external consumers are not affected
  64  * by the change. If you make any changes to this list, be sure to update
  65  * the property table in usr/src/common/zfs/zfs_prop.c.
  66  */
  67 typedef enum {
  68         ZFS_PROP_TYPE,
  69         ZFS_PROP_CREATION,
  70         ZFS_PROP_USED,
  71         ZFS_PROP_AVAILABLE,
  72         ZFS_PROP_REFERENCED,
  73         ZFS_PROP_COMPRESSRATIO,
  74         ZFS_PROP_MOUNTED,
  75         ZFS_PROP_ORIGIN,
  76         ZFS_PROP_QUOTA,
  77         ZFS_PROP_RESERVATION,
  78         ZFS_PROP_VOLSIZE,
  79         ZFS_PROP_VOLBLOCKSIZE,
  80         ZFS_PROP_RECORDSIZE,
  81         ZFS_PROP_MOUNTPOINT,
  82         ZFS_PROP_SHARENFS,
  83         ZFS_PROP_CHECKSUM,
  84         ZFS_PROP_COMPRESSION,
  85         ZFS_PROP_ATIME,
  86         ZFS_PROP_DEVICES,
  87         ZFS_PROP_EXEC,
  88         ZFS_PROP_SETUID,
  89         ZFS_PROP_READONLY,
  90         ZFS_PROP_ZONED,
  91         ZFS_PROP_SNAPDIR,
  92         ZFS_PROP_PRIVATE,               /* not exposed to user, temporary */
  93         ZFS_PROP_ACLINHERIT,
  94         ZFS_PROP_CREATETXG,             /* not exposed to the user */
  95         ZFS_PROP_NAME,                  /* not exposed to the user */
  96         ZFS_PROP_CANMOUNT,
  97         ZFS_PROP_ISCSIOPTIONS,          /* not exposed to the user */
  98         ZFS_PROP_XATTR,
  99         ZFS_PROP_NUMCLONES,             /* not exposed to the user */
 100         ZFS_PROP_COPIES,
 101         ZFS_PROP_VERSION,
 102         ZFS_PROP_UTF8ONLY,
 103         ZFS_PROP_NORMALIZE,
 104         ZFS_PROP_CASE,
 105         ZFS_PROP_VSCAN,
 106         ZFS_PROP_NBMAND,
 107         ZFS_PROP_SHARESMB,
 108         ZFS_PROP_REFQUOTA,
 109         ZFS_PROP_REFRESERVATION,
 110         ZFS_PROP_GUID,
 111         ZFS_PROP_PRIMARYCACHE,
 112         ZFS_PROP_SECONDARYCACHE,
 113         ZFS_PROP_USEDSNAP,
 114         ZFS_PROP_USEDDS,
 115         ZFS_PROP_USEDCHILD,
 116         ZFS_PROP_USEDREFRESERV,
 117         ZFS_PROP_USERACCOUNTING,        /* not exposed to the user */
 118         ZFS_PROP_STMF_SHAREINFO,        /* not exposed to the user */
 119         ZFS_PROP_DEFER_DESTROY,
 120         ZFS_PROP_USERREFS,
 121         ZFS_PROP_LOGBIAS,
 122         ZFS_PROP_UNIQUE,                /* not exposed to the user */
 123         ZFS_PROP_OBJSETID,              /* not exposed to the user */
 124         ZFS_PROP_DEDUP,
 125         ZFS_PROP_MLSLABEL,
 126         ZFS_PROP_SYNC,
 127         ZFS_PROP_REFRATIO,
 128         ZFS_PROP_WRITTEN,
 129         ZFS_PROP_CLONES,
 130         ZFS_NUM_PROPS
 131 } zfs_prop_t;
 132
 133 typedef enum {
 134         ZFS_PROP_USERUSED,
 135         ZFS_PROP_USERQUOTA,
 136         ZFS_PROP_GROUPUSED,
 137         ZFS_PROP_GROUPQUOTA,
 138         ZFS_NUM_USERQUOTA_PROPS
 139 } zfs_userquota_prop_t;
 140
 141 extern const char *zfs_userquota_prop_prefixes[ZFS_NUM_USERQUOTA_PROPS];
 142
 143 /*
 144  * Pool properties are identified by these constants and must be added to the
 145  * end of this list to ensure that external consumers are not affected
 146  * by the change. If you make any changes to this list, be sure to update
 147  * the property table in usr/src/common/zfs/zpool_prop.c.
 148  */
 149 typedef enum {
 150         ZPOOL_PROP_NAME,
 151         ZPOOL_PROP_SIZE,
 152         ZPOOL_PROP_CAPACITY,
 153         ZPOOL_PROP_ALTROOT,
 154         ZPOOL_PROP_HEALTH,
 155         ZPOOL_PROP_GUID,
 156         ZPOOL_PROP_VERSION,
 157         ZPOOL_PROP_BOOTFS,
 158         ZPOOL_PROP_DELEGATION,
 159         ZPOOL_PROP_AUTOREPLACE,
 160         ZPOOL_PROP_CACHEFILE,
 161         ZPOOL_PROP_FAILUREMODE,
 162         ZPOOL_PROP_LISTSNAPS,
 163         ZPOOL_PROP_AUTOEXPAND,
 164         ZPOOL_PROP_DEDUPDITTO,
 165         ZPOOL_PROP_DEDUPRATIO,
 166         ZPOOL_PROP_FREE,
 167         ZPOOL_PROP_ALLOCATED,
 168         ZPOOL_PROP_READONLY,
 169         ZPOOL_PROP_ASHIFT,
 170         ZPOOL_PROP_COMMENT,
 171         ZPOOL_PROP_EXPANDSZ,
 172         ZPOOL_NUM_PROPS
 173 } zpool_prop_t;
 174
 175 /* Small enough to not hog a whole line of printout in zpool(1M). */
 176 #define ZPROP_MAX_COMMENT       32
 177
 178 #define ZPROP_CONT              -2
 179 #define ZPROP_INVAL             -1
 180
 181 #define ZPROP_VALUE             "value"
 182 #define ZPROP_SOURCE            "source"
 183
 184 typedef enum {
 185         ZPROP_SRC_NONE = 0x1,
 186         ZPROP_SRC_DEFAULT = 0x2,
 187         ZPROP_SRC_TEMPORARY = 0x4,
 188         ZPROP_SRC_LOCAL = 0x8,
 189         ZPROP_SRC_INHERITED = 0x10,
 190         ZPROP_SRC_RECEIVED = 0x20
 191 } zprop_source_t;
 192
 193 #define ZPROP_SRC_ALL   0x3f
 194
 195 #define ZPROP_SOURCE_VAL_RECVD  "$recvd"
 196 #define ZPROP_N_MORE_ERRORS     "N_MORE_ERRORS"
 197 /*
 198  * Dataset flag implemented as a special entry in the props zap object
 199  * indicating that the dataset has received properties on or after
 200  * SPA_VERSION_RECVD_PROPS. The first such receive blows away local properties
 201  * just as it did in earlier versions, and thereafter, local properties are
 202  * preserved.
 203  */
 204 #define ZPROP_HAS_RECVD         "$hasrecvd"
 205
 206 typedef enum {
 207         ZPROP_ERR_NOCLEAR = 0x1, /* failure to clear existing props */
 208         ZPROP_ERR_NORESTORE = 0x2 /* failure to restore props on error */
 209 } zprop_errflags_t;
 210
 211 typedef int (*zprop_func)(int, void *);
 212
 213 /*
 214  * Properties to be set on the root file system of a new pool
 215  * are stuffed into their own nvlist, which is then included in
 216  * the properties nvlist with the pool properties.
 217  */
 218 #define ZPOOL_ROOTFS_PROPS      "root-props-nvl"
 219
 220 /*
 221  * Dataset property functions shared between libzfs and kernel.
 222  */
 223 const char *zfs_prop_default_string(zfs_prop_t);
 224 uint64_t zfs_prop_default_numeric(zfs_prop_t);
 225 boolean_t zfs_prop_readonly(zfs_prop_t);
 226 boolean_t zfs_prop_inheritable(zfs_prop_t);
 227 boolean_t zfs_prop_setonce(zfs_prop_t);
 228 const char *zfs_prop_to_name(zfs_prop_t);
 229 zfs_prop_t zfs_name_to_prop(const char *);
 230 boolean_t zfs_prop_user(const char *);
 231 boolean_t zfs_prop_userquota(const char *);
 232 boolean_t zfs_prop_written(const char *);
 233 int zfs_prop_index_to_string(zfs_prop_t, uint64_t, const char **);
 234 int zfs_prop_string_to_index(zfs_prop_t, const char *, uint64_t *);
 235 uint64_t zfs_prop_random_value(zfs_prop_t, uint64_t seed);
 236 boolean_t zfs_prop_valid_for_type(int, zfs_type_t);
 237
 238 /*
 239  * Pool property functions shared between libzfs and kernel.
 240  */
 241 zpool_prop_t zpool_name_to_prop(const char *);
 242 const char *zpool_prop_to_name(zpool_prop_t);
 243 const char *zpool_prop_default_string(zpool_prop_t);
 244 uint64_t zpool_prop_default_numeric(zpool_prop_t);
 245 boolean_t zpool_prop_readonly(zpool_prop_t);
 246 int zpool_prop_index_to_string(zpool_prop_t, uint64_t, const char **);
 247 int zpool_prop_string_to_index(zpool_prop_t, const char *, uint64_t *);
 248 uint64_t zpool_prop_random_value(zpool_prop_t, uint64_t seed);
 249
 250 /*
 251  * Definitions for the Delegation.
 252  */
 253 typedef enum {
 254         ZFS_DELEG_WHO_UNKNOWN = 0,
 255         ZFS_DELEG_USER = 'u',
 256         ZFS_DELEG_USER_SETS = 'U',
 257         ZFS_DELEG_GROUP = 'g',
 258         ZFS_DELEG_GROUP_SETS = 'G',
 259         ZFS_DELEG_EVERYONE = 'e',
 260         ZFS_DELEG_EVERYONE_SETS = 'E',
 261         ZFS_DELEG_CREATE = 'c',
 262         ZFS_DELEG_CREATE_SETS = 'C',
 263         ZFS_DELEG_NAMED_SET = 's',
 264         ZFS_DELEG_NAMED_SET_SETS = 'S'
 265 } zfs_deleg_who_type_t;
 266
 267 typedef enum {
 268         ZFS_DELEG_NONE = 0,
 269         ZFS_DELEG_PERM_LOCAL = 1,
 270         ZFS_DELEG_PERM_DESCENDENT = 2,
 271         ZFS_DELEG_PERM_LOCALDESCENDENT = 3,
 272         ZFS_DELEG_PERM_CREATE = 4
 273 } zfs_deleg_inherit_t;
 274
 275 #define ZFS_DELEG_PERM_UID      "uid"
 276 #define ZFS_DELEG_PERM_GID      "gid"
 277 #define ZFS_DELEG_PERM_GROUPS   "groups"
 278
 279 #define ZFS_MLSLABEL_DEFAULT    "none"
 280
 281 #define ZFS_SMB_ACL_SRC         "src"
 282 #define ZFS_SMB_ACL_TARGET      "target"
 283
 284 typedef enum {
 285         ZFS_CANMOUNT_OFF = 0,
 286         ZFS_CANMOUNT_ON = 1,
 287         ZFS_CANMOUNT_NOAUTO = 2
 288 } zfs_canmount_type_t;
 289
 290 typedef enum {
 291         ZFS_LOGBIAS_LATENCY = 0,
 292         ZFS_LOGBIAS_THROUGHPUT = 1
 293 } zfs_logbias_op_t;
 294
 295 typedef enum zfs_share_op {
 296         ZFS_SHARE_NFS = 0,
 297         ZFS_UNSHARE_NFS = 1,
 298         ZFS_SHARE_SMB = 2,
 299         ZFS_UNSHARE_SMB = 3
 300 } zfs_share_op_t;
 301
 302 typedef enum zfs_smb_acl_op {
 303         ZFS_SMB_ACL_ADD,
 304         ZFS_SMB_ACL_REMOVE,
 305         ZFS_SMB_ACL_RENAME,
 306         ZFS_SMB_ACL_PURGE
 307 } zfs_smb_acl_op_t;
 308
 309 typedef enum zfs_cache_type {
 310         ZFS_CACHE_NONE = 0,
 311         ZFS_CACHE_METADATA = 1,
 312         ZFS_CACHE_ALL = 2
 313 } zfs_cache_type_t;
 314
 315 typedef enum {
 316         ZFS_SYNC_STANDARD = 0,
 317         ZFS_SYNC_ALWAYS = 1,
 318         ZFS_SYNC_DISABLED = 2
 319 } zfs_sync_type_t;
 320
 321 typedef enum {
 322         ZFS_XATTR_OFF = 0,
 323         ZFS_XATTR_DIR = 1,
 324         ZFS_XATTR_SA = 2
 325 } zfs_xattr_type_t;
 326
 327 /*
 328  * On-disk version number.
 329  */
 330 #define SPA_VERSION_1                   1ULL
 331 #define SPA_VERSION_2                   2ULL
 332 #define SPA_VERSION_3                   3ULL
 333 #define SPA_VERSION_4                   4ULL
 334 #define SPA_VERSION_5                   5ULL
 335 #define SPA_VERSION_6                   6ULL
 336 #define SPA_VERSION_7                   7ULL
 337 #define SPA_VERSION_8                   8ULL
 338 #define SPA_VERSION_9                   9ULL
 339 #define SPA_VERSION_10                  10ULL
 340 #define SPA_VERSION_11                  11ULL
 341 #define SPA_VERSION_12                  12ULL
 342 #define SPA_VERSION_13                  13ULL
 343 #define SPA_VERSION_14                  14ULL
 344 #define SPA_VERSION_15                  15ULL
 345 #define SPA_VERSION_16                  16ULL
 346 #define SPA_VERSION_17                  17ULL
 347 #define SPA_VERSION_18                  18ULL
 348 #define SPA_VERSION_19                  19ULL
 349 #define SPA_VERSION_20                  20ULL
 350 #define SPA_VERSION_21                  21ULL
 351 #define SPA_VERSION_22                  22ULL
 352 #define SPA_VERSION_23                  23ULL
 353 #define SPA_VERSION_24                  24ULL
 354 #define SPA_VERSION_25                  25ULL
 355 #define SPA_VERSION_26                  26ULL
 356 #define SPA_VERSION_27                  27ULL
 357 #define SPA_VERSION_28                  28ULL
 358
 359 /*
 360  * When bumping up SPA_VERSION, make sure GRUB ZFS understands the on-disk
 361  * format change. Go to usr/src/grub/grub-0.97/stage2/{zfs-include/, fsys_zfs*},
 362  * and do the appropriate changes.  Also bump the version number in
 363  * usr/src/grub/capability.
 364  */
 365 #define SPA_VERSION                     SPA_VERSION_28
 366 #define SPA_VERSION_STRING              "28"
 367
 368 /*
 369  * Symbolic names for the changes that caused a SPA_VERSION switch.
 370  * Used in the code when checking for presence or absence of a feature.
 371  * Feel free to define multiple symbolic names for each version if there
 372  * were multiple changes to on-disk structures during that version.
 373  *
 374  * NOTE: When checking the current SPA_VERSION in your code, be sure
 375  *       to use spa_version() since it reports the version of the
 376  *       last synced uberblock.  Checking the in-flight version can
 377  *       be dangerous in some cases.
 378  */
 379 #define SPA_VERSION_INITIAL             SPA_VERSION_1
 380 #define SPA_VERSION_DITTO_BLOCKS        SPA_VERSION_2
 381 #define SPA_VERSION_SPARES              SPA_VERSION_3
 382 #define SPA_VERSION_RAIDZ2              SPA_VERSION_3
 383 #define SPA_VERSION_BPOBJ_ACCOUNT       SPA_VERSION_3
 384 #define SPA_VERSION_RAIDZ_DEFLATE       SPA_VERSION_3
 385 #define SPA_VERSION_DNODE_BYTES         SPA_VERSION_3
 386 #define SPA_VERSION_ZPOOL_HISTORY       SPA_VERSION_4
 387 #define SPA_VERSION_GZIP_COMPRESSION    SPA_VERSION_5
 388 #define SPA_VERSION_BOOTFS              SPA_VERSION_6
 389 #define SPA_VERSION_SLOGS               SPA_VERSION_7
 390 #define SPA_VERSION_DELEGATED_PERMS     SPA_VERSION_8
 391 #define SPA_VERSION_FUID                SPA_VERSION_9
 392 #define SPA_VERSION_REFRESERVATION      SPA_VERSION_9
 393 #define SPA_VERSION_REFQUOTA            SPA_VERSION_9
 394 #define SPA_VERSION_UNIQUE_ACCURATE     SPA_VERSION_9
 395 #define SPA_VERSION_L2CACHE             SPA_VERSION_10
 396 #define SPA_VERSION_NEXT_CLONES         SPA_VERSION_11
 397 #define SPA_VERSION_ORIGIN              SPA_VERSION_11
 398 #define SPA_VERSION_DSL_SCRUB           SPA_VERSION_11
 399 #define SPA_VERSION_SNAP_PROPS          SPA_VERSION_12
 400 #define SPA_VERSION_USED_BREAKDOWN      SPA_VERSION_13
 401 #define SPA_VERSION_PASSTHROUGH_X       SPA_VERSION_14
 402 #define SPA_VERSION_USERSPACE           SPA_VERSION_15
 403 #define SPA_VERSION_STMF_PROP           SPA_VERSION_16
 404 #define SPA_VERSION_RAIDZ3              SPA_VERSION_17
 405 #define SPA_VERSION_USERREFS            SPA_VERSION_18
 406 #define SPA_VERSION_HOLES               SPA_VERSION_19
 407 #define SPA_VERSION_ZLE_COMPRESSION     SPA_VERSION_20
 408 #define SPA_VERSION_DEDUP               SPA_VERSION_21
 409 #define SPA_VERSION_RECVD_PROPS         SPA_VERSION_22
 410 #define SPA_VERSION_SLIM_ZIL            SPA_VERSION_23
 411 #define SPA_VERSION_SA                  SPA_VERSION_24
 412 #define SPA_VERSION_SCAN                SPA_VERSION_25
 413 #define SPA_VERSION_DIR_CLONES          SPA_VERSION_26
 414 #define SPA_VERSION_DEADLISTS           SPA_VERSION_26
 415 #define SPA_VERSION_FAST_SNAP           SPA_VERSION_27
 416 #define SPA_VERSION_MULTI_REPLACE       SPA_VERSION_28
 417
 418 /*
 419  * ZPL version - rev'd whenever an incompatible on-disk format change
 420  * occurs.  This is independent of SPA/DMU/ZAP versioning.  You must
 421  * also update the version_table[] and help message in zfs_prop.c.
 422  *
 423  * When changing, be sure to teach GRUB how to read the new format!
 424  * See usr/src/grub/grub-0.97/stage2/{zfs-include/,fsys_zfs*}
 425  */
 426 #define ZPL_VERSION_1                   1ULL
 427 #define ZPL_VERSION_2                   2ULL
 428 #define ZPL_VERSION_3                   3ULL
 429 #define ZPL_VERSION_4                   4ULL
 430 #define ZPL_VERSION_5                   5ULL
 431 #define ZPL_VERSION                     ZPL_VERSION_5
 432 #define ZPL_VERSION_STRING              "5"
 433
 434 #define ZPL_VERSION_INITIAL             ZPL_VERSION_1
 435 #define ZPL_VERSION_DIRENT_TYPE         ZPL_VERSION_2
 436 #define ZPL_VERSION_FUID                ZPL_VERSION_3
 437 #define ZPL_VERSION_NORMALIZATION       ZPL_VERSION_3
 438 #define ZPL_VERSION_SYSATTR             ZPL_VERSION_3
 439 #define ZPL_VERSION_USERSPACE           ZPL_VERSION_4
 440 #define ZPL_VERSION_SA                  ZPL_VERSION_5
 441
 442 /* Rewind request information */
 443 #define ZPOOL_NO_REWIND         1  /* No policy - default behavior */
 444 #define ZPOOL_NEVER_REWIND      2  /* Do not search for best txg or rewind */
 445 #define ZPOOL_TRY_REWIND        4  /* Search for best txg, but do not rewind */
 446 #define ZPOOL_DO_REWIND         8  /* Rewind to best txg w/in deferred frees */
 447 #define ZPOOL_EXTREME_REWIND    16 /* Allow extreme measures to find best txg */
 448 #define ZPOOL_REWIND_MASK       28 /* All the possible rewind bits */
 449 #define ZPOOL_REWIND_POLICIES   31 /* All the possible policy bits */
 450
 451 typedef struct zpool_rewind_policy {
 452         uint32_t        zrp_request;    /* rewind behavior requested */
 453         uint64_t        zrp_maxmeta;    /* max acceptable meta-data errors */
 454         uint64_t        zrp_maxdata;    /* max acceptable data errors */
 455         uint64_t        zrp_txg;        /* specific txg to load */
 456 } zpool_rewind_policy_t;
 457
 458 /*
 459  * The following are configuration names used in the nvlist describing a pool's
 460  * configuration.
 461  */
 462 #define ZPOOL_CONFIG_VERSION            "version"
 463 #define ZPOOL_CONFIG_POOL_NAME          "name"
 464 #define ZPOOL_CONFIG_POOL_STATE         "state"
 465 #define ZPOOL_CONFIG_POOL_TXG           "txg"
 466 #define ZPOOL_CONFIG_POOL_GUID          "pool_guid"
 467 #define ZPOOL_CONFIG_CREATE_TXG         "create_txg"
 468 #define ZPOOL_CONFIG_TOP_GUID           "top_guid"
 469 #define ZPOOL_CONFIG_VDEV_TREE          "vdev_tree"
 470 #define ZPOOL_CONFIG_TYPE               "type"
 471 #define ZPOOL_CONFIG_CHILDREN           "children"
 472 #define ZPOOL_CONFIG_ID                 "id"
 473 #define ZPOOL_CONFIG_GUID               "guid"
 474 #define ZPOOL_CONFIG_PATH               "path"
 475 #define ZPOOL_CONFIG_DEVID              "devid"
 476 #define ZPOOL_CONFIG_METASLAB_ARRAY     "metaslab_array"
 477 #define ZPOOL_CONFIG_METASLAB_SHIFT     "metaslab_shift"
 478 #define ZPOOL_CONFIG_ASHIFT             "ashift"
 479 #define ZPOOL_CONFIG_ASIZE              "asize"
 480 #define ZPOOL_CONFIG_DTL                "DTL"
 481 #define ZPOOL_CONFIG_SCAN_STATS         "scan_stats"    /* not stored on disk */
 482 #define ZPOOL_CONFIG_VDEV_STATS         "vdev_stats"    /* not stored on disk */
 483 #define ZPOOL_CONFIG_WHOLE_DISK         "whole_disk"
 484 #define ZPOOL_CONFIG_ERRCOUNT           "error_count"
 485 #define ZPOOL_CONFIG_NOT_PRESENT        "not_present"
 486 #define ZPOOL_CONFIG_SPARES             "spares"
 487 #define ZPOOL_CONFIG_IS_SPARE           "is_spare"
 488 #define ZPOOL_CONFIG_NPARITY            "nparity"
 489 #define ZPOOL_CONFIG_HOSTID             "hostid"
 490 #define ZPOOL_CONFIG_HOSTNAME           "hostname"
 491 #define ZPOOL_CONFIG_LOADED_TIME        "initial_load_time"
 492 #define ZPOOL_CONFIG_UNSPARE            "unspare"
 493 #define ZPOOL_CONFIG_PHYS_PATH          "phys_path"
 494 #define ZPOOL_CONFIG_IS_LOG             "is_log"
 495 #define ZPOOL_CONFIG_L2CACHE            "l2cache"
 496 #define ZPOOL_CONFIG_HOLE_ARRAY         "hole_array"
 497 #define ZPOOL_CONFIG_VDEV_CHILDREN      "vdev_children"
 498 #define ZPOOL_CONFIG_IS_HOLE            "is_hole"
 499 #define ZPOOL_CONFIG_DDT_HISTOGRAM      "ddt_histogram"
 500 #define ZPOOL_CONFIG_DDT_OBJ_STATS      "ddt_object_stats"
 501 #define ZPOOL_CONFIG_DDT_STATS          "ddt_stats"
 502 #define ZPOOL_CONFIG_SPLIT              "splitcfg"
 503 #define ZPOOL_CONFIG_ORIG_GUID          "orig_guid"
 504 #define ZPOOL_CONFIG_SPLIT_GUID         "split_guid"
 505 #define ZPOOL_CONFIG_SPLIT_LIST         "guid_list"
 506 #define ZPOOL_CONFIG_REMOVING           "removing"
 507 #define ZPOOL_CONFIG_RESILVERING        "resilvering"
 508 #define ZPOOL_CONFIG_COMMENT            "comment"
 509 #define ZPOOL_CONFIG_SUSPENDED          "suspended"     /* not stored on disk */
 510 #define ZPOOL_CONFIG_TIMESTAMP          "timestamp"     /* not stored on disk */
 511 #define ZPOOL_CONFIG_BOOTFS             "bootfs"        /* not stored on disk */
 512 #define ZPOOL_CONFIG_MISSING_DEVICES    "missing_vdevs" /* not stored on disk */
 513 #define ZPOOL_CONFIG_LOAD_INFO          "load_info"     /* not stored on disk */
 514 /*
 515  * The persistent vdev state is stored as separate values rather than a single
 516  * 'vdev_state' entry.  This is because a device can be in multiple states, such
 517  * as offline and degraded.
 518  */
 519 #define ZPOOL_CONFIG_OFFLINE            "offline"
 520 #define ZPOOL_CONFIG_FAULTED            "faulted"
 521 #define ZPOOL_CONFIG_DEGRADED           "degraded"
 522 #define ZPOOL_CONFIG_REMOVED            "removed"
 523 #define ZPOOL_CONFIG_FRU                "fru"
 524 #define ZPOOL_CONFIG_AUX_STATE          "aux_state"
 525
 526 /* Rewind policy parameters */
 527 #define ZPOOL_REWIND_POLICY             "rewind-policy"
 528 #define ZPOOL_REWIND_REQUEST            "rewind-request"
 529 #define ZPOOL_REWIND_REQUEST_TXG        "rewind-request-txg"
 530 #define ZPOOL_REWIND_META_THRESH        "rewind-meta-thresh"
 531 #define ZPOOL_REWIND_DATA_THRESH        "rewind-data-thresh"
 532
 533 /* Rewind data discovered */
 534 #define ZPOOL_CONFIG_LOAD_TIME          "rewind_txg_ts"
 535 #define ZPOOL_CONFIG_LOAD_DATA_ERRORS   "verify_data_errors"
 536 #define ZPOOL_CONFIG_REWIND_TIME        "seconds_of_rewind"
 537
 538 #define VDEV_TYPE_ROOT                  "root"
 539 #define VDEV_TYPE_MIRROR                "mirror"
 540 #define VDEV_TYPE_REPLACING             "replacing"
 541 #define VDEV_TYPE_RAIDZ                 "raidz"
 542 #define VDEV_TYPE_DISK                  "disk"
 543 #define VDEV_TYPE_FILE                  "file"
 544 #define VDEV_TYPE_MISSING               "missing"
 545 #define VDEV_TYPE_HOLE                  "hole"
 546 #define VDEV_TYPE_SPARE                 "spare"
 547 #define VDEV_TYPE_LOG                   "log"
 548 #define VDEV_TYPE_L2CACHE               "l2cache"
 549
 550 /*
 551  * This is needed in userland to report the minimum necessary device size.
 552  */
 553 #define SPA_MINDEVSIZE          (64ULL << 20)
 554
 555 /*
 556  * The location of the pool configuration repository, shared between kernel and
 557  * userland.
 558  */
 559 #define ZPOOL_CACHE             "/etc/zfs/zpool.cache"
 560
 561 /*
 562  * vdev states are ordered from least to most healthy.
 563  * A vdev that's CANT_OPEN or below is considered unusable.
 564  */
 565 typedef enum vdev_state {
 566         VDEV_STATE_UNKNOWN = 0, /* Uninitialized vdev                   */
 567         VDEV_STATE_CLOSED,      /* Not currently open                   */
 568         VDEV_STATE_OFFLINE,     /* Not allowed to open                  */
 569         VDEV_STATE_REMOVED,     /* Explicitly removed from system       */
 570         VDEV_STATE_CANT_OPEN,   /* Tried to open, but failed            */
 571         VDEV_STATE_FAULTED,     /* External request to fault device     */
 572         VDEV_STATE_DEGRADED,    /* Replicated vdev with unhealthy kids  */
 573         VDEV_STATE_HEALTHY      /* Presumed good                        */
 574 } vdev_state_t;
 575
 576 #define VDEV_STATE_ONLINE       VDEV_STATE_HEALTHY
 577
 578 /*
 579  * vdev aux states.  When a vdev is in the CANT_OPEN state, the aux field
 580  * of the vdev stats structure uses these constants to distinguish why.
 581  */
 582 typedef enum vdev_aux {
 583         VDEV_AUX_NONE,          /* no error                             */
 584         VDEV_AUX_OPEN_FAILED,   /* ldi_open_*() or vn_open() failed     */
 585         VDEV_AUX_CORRUPT_DATA,  /* bad label or disk contents           */
 586         VDEV_AUX_NO_REPLICAS,   /* insufficient number of replicas      */
 587         VDEV_AUX_BAD_GUID_SUM,  /* vdev guid sum doesn't match          */
 588         VDEV_AUX_TOO_SMALL,     /* vdev size is too small               */
 589         VDEV_AUX_BAD_LABEL,     /* the label is OK but invalid          */
 590         VDEV_AUX_VERSION_NEWER, /* on-disk version is too new           */
 591         VDEV_AUX_VERSION_OLDER, /* on-disk version is too old           */
 592         VDEV_AUX_SPARED,        /* hot spare used in another pool       */
 593         VDEV_AUX_ERR_EXCEEDED,  /* too many errors                      */
 594         VDEV_AUX_IO_FAILURE,    /* experienced I/O failure              */
 595         VDEV_AUX_BAD_LOG,       /* cannot read log chain(s)             */
 596         VDEV_AUX_EXTERNAL,      /* external diagnosis                   */
 597         VDEV_AUX_SPLIT_POOL     /* vdev was split off into another pool */
 598 } vdev_aux_t;
 599
 600 /*
 601  * pool state.  The following states are written to disk as part of the normal
 602  * SPA lifecycle: ACTIVE, EXPORTED, DESTROYED, SPARE, L2CACHE.  The remaining
 603  * states are software abstractions used at various levels to communicate
 604  * pool state.
 605  */
 606 typedef enum pool_state {
 607         POOL_STATE_ACTIVE = 0,          /* In active use                */
 608         POOL_STATE_EXPORTED,            /* Explicitly exported          */
 609         POOL_STATE_DESTROYED,           /* Explicitly destroyed         */
 610         POOL_STATE_SPARE,               /* Reserved for hot spare use   */
 611         POOL_STATE_L2CACHE,             /* Level 2 ARC device           */
 612         POOL_STATE_UNINITIALIZED,       /* Internal spa_t state         */
 613         POOL_STATE_UNAVAIL,             /* Internal libzfs state        */
 614         POOL_STATE_POTENTIALLY_ACTIVE   /* Internal libzfs state        */
 615 } pool_state_t;
 616
 617 /*
 618  * Scan Functions.
 619  */
 620 typedef enum pool_scan_func {
 621         POOL_SCAN_NONE,
 622         POOL_SCAN_SCRUB,
 623         POOL_SCAN_RESILVER,
 624         POOL_SCAN_FUNCS
 625 } pool_scan_func_t;
 626
 627 /*
 628  * ZIO types.  Needed to interpret vdev statistics below.
 629  */
 630 typedef enum zio_type {
 631         ZIO_TYPE_NULL = 0,
 632         ZIO_TYPE_READ,
 633         ZIO_TYPE_WRITE,
 634         ZIO_TYPE_FREE,
 635         ZIO_TYPE_CLAIM,
 636         ZIO_TYPE_IOCTL,
 637         ZIO_TYPES
 638 } zio_type_t;
 639
 640 /*
 641  * Pool statistics.  Note: all fields should be 64-bit because this
 642  * is passed between kernel and userland as an nvlist uint64 array.
 643  */
 644 typedef struct pool_scan_stat {
 645         /* values stored on disk */
 646         uint64_t        pss_func;       /* pool_scan_func_t */
 647         uint64_t        pss_state;      /* dsl_scan_state_t */
 648         uint64_t        pss_start_time; /* scan start time */
 649         uint64_t        pss_end_time;   /* scan end time */
 650         uint64_t        pss_to_examine; /* total bytes to scan */
 651         uint64_t        pss_examined;   /* total examined bytes */
 652         uint64_t        pss_to_process; /* total bytes to process */
 653         uint64_t        pss_processed;  /* total processed bytes */
 654         uint64_t        pss_errors;     /* scan errors  */
 655
 656         /* values not stored on disk */
 657         uint64_t        pss_pass_exam;  /* examined bytes per scan pass */
 658         uint64_t        pss_pass_start; /* start time of a scan pass */
 659 } pool_scan_stat_t;
 660
 661 typedef enum dsl_scan_state {
 662         DSS_NONE,
 663         DSS_SCANNING,
 664         DSS_FINISHED,
 665         DSS_CANCELED,
 666         DSS_NUM_STATES
 667 } dsl_scan_state_t;
 668
 669
 670 /*
 671  * Vdev statistics.  Note: all fields should be 64-bit because this
 672  * is passed between kernel and userland as an nvlist uint64 array.
 673  */
 674 typedef struct vdev_stat {
 675         hrtime_t        vs_timestamp;           /* time since vdev load */
 676         uint64_t        vs_state;               /* vdev state           */
 677         uint64_t        vs_aux;                 /* see vdev_aux_t       */
 678         uint64_t        vs_alloc;               /* space allocated      */
 679         uint64_t        vs_space;               /* total capacity       */
 680         uint64_t        vs_dspace;              /* deflated capacity    */
 681         uint64_t        vs_rsize;               /* replaceable dev size */
 682         uint64_t        vs_esize;               /* expandable dev size */
 683         uint64_t        vs_ops[ZIO_TYPES];      /* operation count      */
 684         uint64_t        vs_bytes[ZIO_TYPES];    /* bytes read/written   */
 685         uint64_t        vs_read_errors;         /* read errors          */
 686         uint64_t        vs_write_errors;        /* write errors         */
 687         uint64_t        vs_checksum_errors;     /* checksum errors      */
 688         uint64_t        vs_self_healed;         /* self-healed bytes    */
 689         uint64_t        vs_scan_removing;       /* removing?    */
 690         uint64_t        vs_scan_processed;      /* scan processed bytes */
 691 } vdev_stat_t;
 692
 693 /*
 694  * DDT statistics.  Note: all fields should be 64-bit because this
 695  * is passed between kernel and userland as an nvlist uint64 array.
 696  */
 697 typedef struct ddt_object {
 698         uint64_t        ddo_count;      /* number of elments in ddt     */
 699         uint64_t        ddo_dspace;     /* size of ddt on disk          */
 700         uint64_t        ddo_mspace;     /* size of ddt in-core          */
 701 } ddt_object_t;
 702
 703 typedef struct ddt_stat {
 704         uint64_t        dds_blocks;     /* blocks                       */
 705         uint64_t        dds_lsize;      /* logical size                 */
 706         uint64_t        dds_psize;      /* physical size                */
 707         uint64_t        dds_dsize;      /* deflated allocated size      */
 708         uint64_t        dds_ref_blocks; /* referenced blocks            */
 709         uint64_t        dds_ref_lsize;  /* referenced lsize * refcnt    */
 710         uint64_t        dds_ref_psize;  /* referenced psize * refcnt    */
 711         uint64_t        dds_ref_dsize;  /* referenced dsize * refcnt    */
 712 } ddt_stat_t;
 713
 714 typedef struct ddt_histogram {
 715         ddt_stat_t      ddh_stat[64];   /* power-of-two histogram buckets */
 716 } ddt_histogram_t;
 717
 718 #define ZVOL_DRIVER     "zvol"
 719 #define ZFS_DRIVER      "zfs"
 720 #define ZFS_DEV         "/dev/zfs"
 721
 722 /* general zvol path */
 723 #define ZVOL_DIR        "/dev"
 724
 725 #define ZVOL_MAJOR              230
 726 #define ZVOL_MINOR_BITS         4
 727 #define ZVOL_MINOR_MASK         ((1U << ZVOL_MINOR_BITS) - 1)
 728 #define ZVOL_MINORS             (1 << 4)
 729 #define ZVOL_DEV_NAME           "zd"
 730
 731 #define ZVOL_PROP_NAME          "name"
 732 #define ZVOL_DEFAULT_BLOCKSIZE  8192
 733
 734 /*
 735  * /dev/zfs ioctl numbers.
 736  */
 737 #define ZFS_IOC         ('Z' << 8)
 738
 739 typedef enum zfs_ioc {
 740         ZFS_IOC_POOL_CREATE = ZFS_IOC,
 741         ZFS_IOC_POOL_DESTROY,
 742         ZFS_IOC_POOL_IMPORT,
 743         ZFS_IOC_POOL_EXPORT,
 744         ZFS_IOC_POOL_CONFIGS,
 745         ZFS_IOC_POOL_STATS,
 746         ZFS_IOC_POOL_TRYIMPORT,
 747         ZFS_IOC_POOL_SCAN,
 748         ZFS_IOC_POOL_FREEZE,
 749         ZFS_IOC_POOL_UPGRADE,
 750         ZFS_IOC_POOL_GET_HISTORY,
 751         ZFS_IOC_VDEV_ADD,
 752         ZFS_IOC_VDEV_REMOVE,
 753         ZFS_IOC_VDEV_SET_STATE,
 754         ZFS_IOC_VDEV_ATTACH,
 755         ZFS_IOC_VDEV_DETACH,
 756         ZFS_IOC_VDEV_SETPATH,
 757         ZFS_IOC_VDEV_SETFRU,
 758         ZFS_IOC_OBJSET_STATS,
 759         ZFS_IOC_OBJSET_ZPLPROPS,
 760         ZFS_IOC_DATASET_LIST_NEXT,
 761         ZFS_IOC_SNAPSHOT_LIST_NEXT,
 762         ZFS_IOC_SET_PROP,
 763         ZFS_IOC_CREATE_MINOR,
 764         ZFS_IOC_REMOVE_MINOR,
 765         ZFS_IOC_CREATE,
 766         ZFS_IOC_DESTROY,
 767         ZFS_IOC_ROLLBACK,
 768         ZFS_IOC_RENAME,
 769         ZFS_IOC_RECV,
 770         ZFS_IOC_SEND,
 771         ZFS_IOC_INJECT_FAULT,
 772         ZFS_IOC_CLEAR_FAULT,
 773         ZFS_IOC_INJECT_LIST_NEXT,
 774         ZFS_IOC_ERROR_LOG,
 775         ZFS_IOC_CLEAR,
 776         ZFS_IOC_PROMOTE,
 777         ZFS_IOC_DESTROY_SNAPS_NVL,
 778         ZFS_IOC_SNAPSHOT,
 779         ZFS_IOC_DSOBJ_TO_DSNAME,
 780         ZFS_IOC_OBJ_TO_PATH,
 781         ZFS_IOC_POOL_SET_PROPS,
 782         ZFS_IOC_POOL_GET_PROPS,
 783         ZFS_IOC_SET_FSACL,
 784         ZFS_IOC_GET_FSACL,
 785         ZFS_IOC_SHARE,
 786         ZFS_IOC_INHERIT_PROP,
 787         ZFS_IOC_SMB_ACL,
 788         ZFS_IOC_USERSPACE_ONE,
 789         ZFS_IOC_USERSPACE_MANY,
 790         ZFS_IOC_USERSPACE_UPGRADE,
 791         ZFS_IOC_HOLD,
 792         ZFS_IOC_RELEASE,
 793         ZFS_IOC_GET_HOLDS,
 794         ZFS_IOC_OBJSET_RECVD_PROPS,
 795         ZFS_IOC_VDEV_SPLIT,
 796         ZFS_IOC_NEXT_OBJ,
 797         ZFS_IOC_DIFF,
 798         ZFS_IOC_TMP_SNAPSHOT,
 799         ZFS_IOC_OBJ_TO_STATS,
 800         ZFS_IOC_EVENTS_NEXT,
 801         ZFS_IOC_EVENTS_CLEAR,
 802         ZFS_IOC_POOL_REGUID,
 803         ZFS_IOC_SPACE_WRITTEN,
 804         ZFS_IOC_SPACE_SNAPS,
 805         ZFS_IOC_POOL_REOPEN,
 806 } zfs_ioc_t;
 807
 808 /*
 809  * zvol ioctl to get dataset name
 810  */
 811 #define BLKZNAME                _IOR(0x12,125,char[ZFS_MAXNAMELEN])
 812
 813 /*
 814  * Internal SPA load state.  Used by FMA diagnosis engine.
 815  */
 816 typedef enum {
 817         SPA_LOAD_NONE,          /* no load in progress  */
 818         SPA_LOAD_OPEN,          /* normal open          */
 819         SPA_LOAD_IMPORT,        /* import in progress   */
 820         SPA_LOAD_TRYIMPORT,     /* tryimport in progress */
 821         SPA_LOAD_RECOVER,       /* recovery requested   */
 822         SPA_LOAD_ERROR          /* load failed          */
 823 } spa_load_state_t;
 824
 825 /*
 826  * Bookmark name values.
 827  */
 828 #define ZPOOL_ERR_LIST          "error list"
 829 #define ZPOOL_ERR_DATASET       "dataset"
 830 #define ZPOOL_ERR_OBJECT        "object"
 831
 832 #define HIS_MAX_RECORD_LEN      (MAXPATHLEN + MAXPATHLEN + 1)
 833
 834 /*
 835  * The following are names used in the nvlist describing
 836  * the pool's history log.
 837  */
 838 #define ZPOOL_HIST_RECORD       "history record"
 839 #define ZPOOL_HIST_TIME         "history time"
 840 #define ZPOOL_HIST_CMD          "history command"
 841 #define ZPOOL_HIST_WHO          "history who"
 842 #define ZPOOL_HIST_ZONE         "history zone"
 843 #define ZPOOL_HIST_HOST         "history hostname"
 844 #define ZPOOL_HIST_TXG          "history txg"
 845 #define ZPOOL_HIST_INT_EVENT    "history internal event"
 846 #define ZPOOL_HIST_INT_STR      "history internal str"
 847
 848 /*
 849  * Flags for ZFS_IOC_VDEV_SET_STATE
 850  */
 851 #define ZFS_ONLINE_CHECKREMOVE  0x1
 852 #define ZFS_ONLINE_UNSPARE      0x2
 853 #define ZFS_ONLINE_FORCEFAULT   0x4
 854 #define ZFS_ONLINE_EXPAND       0x8
 855 #define ZFS_OFFLINE_TEMPORARY   0x1
 856
 857 /*
 858  * Flags for ZFS_IOC_POOL_IMPORT
 859  */
 860 #define ZFS_IMPORT_NORMAL       0x0
 861 #define ZFS_IMPORT_VERBATIM     0x1
 862 #define ZFS_IMPORT_ANY_HOST     0x2
 863 #define ZFS_IMPORT_MISSING_LOG  0x4
 864 #define ZFS_IMPORT_ONLY         0x8
 865
 866 /*
 867  * Sysevent payload members.  ZFS will generate the following sysevents with the
 868  * given payloads:
 869  *
 870  *      ESC_ZFS_RESILVER_START
 871  *      ESC_ZFS_RESILVER_END
 872  *      ESC_ZFS_POOL_DESTROY
 873  *      ESC_ZFS_POOL_REGUID
 874  *
 875  *              ZFS_EV_POOL_NAME        DATA_TYPE_STRING
 876  *              ZFS_EV_POOL_GUID        DATA_TYPE_UINT64
 877  *
 878  *      ESC_ZFS_VDEV_REMOVE
 879  *      ESC_ZFS_VDEV_CLEAR
 880  *      ESC_ZFS_VDEV_CHECK
 881  *
 882  *              ZFS_EV_POOL_NAME        DATA_TYPE_STRING
 883  *              ZFS_EV_POOL_GUID        DATA_TYPE_UINT64
 884  *              ZFS_EV_VDEV_PATH        DATA_TYPE_STRING        (optional)
 885  *              ZFS_EV_VDEV_GUID        DATA_TYPE_UINT64
 886  */
 887 #define ZFS_EV_POOL_NAME        "pool_name"
 888 #define ZFS_EV_POOL_GUID        "pool_guid"
 889 #define ZFS_EV_VDEV_PATH        "vdev_path"
 890 #define ZFS_EV_VDEV_GUID        "vdev_guid"
 891
 892 /*
 893  * Note: This is encoded on-disk, so new events must be added to the
 894  * end, and unused events can not be removed.  Be sure to edit
 895  * libzfs_pool.c: hist_event_table[].
 896  */
 897 typedef enum history_internal_events {
 898         LOG_NO_EVENT = 0,
 899         LOG_POOL_CREATE,
 900         LOG_POOL_VDEV_ADD,
 901         LOG_POOL_REMOVE,
 902         LOG_POOL_DESTROY,
 903         LOG_POOL_EXPORT,
 904         LOG_POOL_IMPORT,
 905         LOG_POOL_VDEV_ATTACH,
 906         LOG_POOL_VDEV_REPLACE,
 907         LOG_POOL_VDEV_DETACH,
 908         LOG_POOL_VDEV_ONLINE,
 909         LOG_POOL_VDEV_OFFLINE,
 910         LOG_POOL_UPGRADE,
 911         LOG_POOL_CLEAR,
 912         LOG_POOL_SCAN,
 913         LOG_POOL_PROPSET,
 914         LOG_DS_CREATE,
 915         LOG_DS_CLONE,
 916         LOG_DS_DESTROY,
 917         LOG_DS_DESTROY_BEGIN,
 918         LOG_DS_INHERIT,
 919         LOG_DS_PROPSET,
 920         LOG_DS_QUOTA,
 921         LOG_DS_PERM_UPDATE,
 922         LOG_DS_PERM_REMOVE,
 923         LOG_DS_PERM_WHO_REMOVE,
 924         LOG_DS_PROMOTE,
 925         LOG_DS_RECEIVE,
 926         LOG_DS_RENAME,
 927         LOG_DS_RESERVATION,
 928         LOG_DS_REPLAY_INC_SYNC,
 929         LOG_DS_REPLAY_FULL_SYNC,
 930         LOG_DS_ROLLBACK,
 931         LOG_DS_SNAPSHOT,
 932         LOG_DS_UPGRADE,
 933         LOG_DS_REFQUOTA,
 934         LOG_DS_REFRESERV,
 935         LOG_POOL_SCAN_DONE,
 936         LOG_DS_USER_HOLD,
 937         LOG_DS_USER_RELEASE,
 938         LOG_POOL_SPLIT,
 939         LOG_END
 940 } history_internal_events_t;
 941
 942 #ifdef  __cplusplus
 943 }
 944 #endif
 945
 946 #endif  /* _SYS_FS_ZFS_H */