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) 2013 by Delphix. All rights reserved.
  25  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  26  * Copyright (c) 2012, Joyent, Inc. All rights reserved.
  27  */
  28
  29 /* Portions Copyright 2010 Robert Milkowski */
  30
  31 #ifndef _SYS_FS_ZFS_H
  32 #define _SYS_FS_ZFS_H
  33
  34 #include <sys/time.h>
  35
  36 #ifdef  __cplusplus
  37 extern "C" {
  38 #endif
  39
  40 /*
  41  * Types and constants shared between userland and the kernel.
  42  */
  43
  44 /*
  45  * Each dataset can be one of the following types.  These constants can be
  46  * combined into masks that can be passed to various functions.
  47  */
  48 typedef enum {
  49         ZFS_TYPE_FILESYSTEM     = 0x1,
  50         ZFS_TYPE_SNAPSHOT       = 0x2,
  51         ZFS_TYPE_VOLUME         = 0x4,
  52         ZFS_TYPE_POOL           = 0x8
  53 } zfs_type_t;
  54
  55 typedef enum dmu_objset_type {
  56         DMU_OST_NONE,
  57         DMU_OST_META,
  58         DMU_OST_ZFS,
  59         DMU_OST_ZVOL,
  60         DMU_OST_OTHER,                  /* For testing only! */
  61         DMU_OST_ANY,                    /* Be careful! */
  62         DMU_OST_NUMTYPES
  63 } dmu_objset_type_t;
  64
  65 #define ZFS_TYPE_DATASET        \
  66         (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME | ZFS_TYPE_SNAPSHOT)
  67
  68 #define ZAP_MAXNAMELEN 256
  69 #define ZAP_MAXVALUELEN (1024 * 8)
  70 #define ZAP_OLDMAXVALUELEN 1024
  71
  72 /*
  73  * Dataset properties are identified by these constants and must be added to
  74  * the end of this list to ensure that external consumers are not affected
  75  * by the change. If you make any changes to this list, be sure to update
  76  * the property table in module/zcommon/zfs_prop.c.
  77  */
  78 typedef enum {
  79         ZFS_PROP_TYPE,
  80         ZFS_PROP_CREATION,
  81         ZFS_PROP_USED,
  82         ZFS_PROP_AVAILABLE,
  83         ZFS_PROP_REFERENCED,
  84         ZFS_PROP_COMPRESSRATIO,
  85         ZFS_PROP_MOUNTED,
  86         ZFS_PROP_ORIGIN,
  87         ZFS_PROP_QUOTA,
  88         ZFS_PROP_RESERVATION,
  89         ZFS_PROP_VOLSIZE,
  90         ZFS_PROP_VOLBLOCKSIZE,
  91         ZFS_PROP_RECORDSIZE,
  92         ZFS_PROP_MOUNTPOINT,
  93         ZFS_PROP_SHARENFS,
  94         ZFS_PROP_CHECKSUM,
  95         ZFS_PROP_COMPRESSION,
  96         ZFS_PROP_ATIME,
  97         ZFS_PROP_DEVICES,
  98         ZFS_PROP_EXEC,
  99         ZFS_PROP_SETUID,
 100         ZFS_PROP_READONLY,
 101         ZFS_PROP_ZONED,
 102         ZFS_PROP_SNAPDIR,
 103         ZFS_PROP_PRIVATE,               /* not exposed to user, temporary */
 104         ZFS_PROP_ACLINHERIT,
 105         ZFS_PROP_CREATETXG,             /* not exposed to the user */
 106         ZFS_PROP_NAME,                  /* not exposed to the user */
 107         ZFS_PROP_CANMOUNT,
 108         ZFS_PROP_ISCSIOPTIONS,          /* not exposed to the user */
 109         ZFS_PROP_XATTR,
 110         ZFS_PROP_NUMCLONES,             /* not exposed to the user */
 111         ZFS_PROP_COPIES,
 112         ZFS_PROP_VERSION,
 113         ZFS_PROP_UTF8ONLY,
 114         ZFS_PROP_NORMALIZE,
 115         ZFS_PROP_CASE,
 116         ZFS_PROP_VSCAN,
 117         ZFS_PROP_NBMAND,
 118         ZFS_PROP_SHARESMB,
 119         ZFS_PROP_REFQUOTA,
 120         ZFS_PROP_REFRESERVATION,
 121         ZFS_PROP_GUID,
 122         ZFS_PROP_PRIMARYCACHE,
 123         ZFS_PROP_SECONDARYCACHE,
 124         ZFS_PROP_USEDSNAP,
 125         ZFS_PROP_USEDDS,
 126         ZFS_PROP_USEDCHILD,
 127         ZFS_PROP_USEDREFRESERV,
 128         ZFS_PROP_USERACCOUNTING,        /* not exposed to the user */
 129         ZFS_PROP_STMF_SHAREINFO,        /* not exposed to the user */
 130         ZFS_PROP_DEFER_DESTROY,
 131         ZFS_PROP_USERREFS,
 132         ZFS_PROP_LOGBIAS,
 133         ZFS_PROP_UNIQUE,                /* not exposed to the user */
 134         ZFS_PROP_OBJSETID,              /* not exposed to the user */
 135         ZFS_PROP_DEDUP,
 136         ZFS_PROP_MLSLABEL,
 137         ZFS_PROP_SYNC,
 138         ZFS_PROP_REFRATIO,
 139         ZFS_PROP_WRITTEN,
 140         ZFS_PROP_CLONES,
 141         ZFS_PROP_LOGICALUSED,
 142         ZFS_PROP_LOGICALREFERENCED,
 143         ZFS_PROP_INCONSISTENT,          /* not exposed to the user */
 144         ZFS_PROP_SNAPDEV,
 145         ZFS_PROP_ACLTYPE,
 146         ZFS_PROP_SELINUX_CONTEXT,
 147         ZFS_PROP_SELINUX_FSCONTEXT,
 148         ZFS_PROP_SELINUX_DEFCONTEXT,
 149         ZFS_PROP_SELINUX_ROOTCONTEXT,
 150         ZFS_PROP_RELATIME,
 151         ZFS_NUM_PROPS
 152 } zfs_prop_t;
 153
 154 typedef enum {
 155         ZFS_PROP_USERUSED,
 156         ZFS_PROP_USERQUOTA,
 157         ZFS_PROP_GROUPUSED,
 158         ZFS_PROP_GROUPQUOTA,
 159         ZFS_NUM_USERQUOTA_PROPS
 160 } zfs_userquota_prop_t;
 161
 162 extern const char *zfs_userquota_prop_prefixes[ZFS_NUM_USERQUOTA_PROPS];
 163
 164 /*
 165  * Pool properties are identified by these constants and must be added to the
 166  * end of this list to ensure that external consumers are not affected
 167  * by the change. If you make any changes to this list, be sure to update
 168  * the property table in module/zcommon/zpool_prop.c.
 169  */
 170 typedef enum {
 171         ZPOOL_PROP_NAME,
 172         ZPOOL_PROP_SIZE,
 173         ZPOOL_PROP_CAPACITY,
 174         ZPOOL_PROP_ALTROOT,
 175         ZPOOL_PROP_HEALTH,
 176         ZPOOL_PROP_GUID,
 177         ZPOOL_PROP_VERSION,
 178         ZPOOL_PROP_BOOTFS,
 179         ZPOOL_PROP_DELEGATION,
 180         ZPOOL_PROP_AUTOREPLACE,
 181         ZPOOL_PROP_CACHEFILE,
 182         ZPOOL_PROP_FAILUREMODE,
 183         ZPOOL_PROP_LISTSNAPS,
 184         ZPOOL_PROP_AUTOEXPAND,
 185         ZPOOL_PROP_DEDUPDITTO,
 186         ZPOOL_PROP_DEDUPRATIO,
 187         ZPOOL_PROP_FREE,
 188         ZPOOL_PROP_ALLOCATED,
 189         ZPOOL_PROP_READONLY,
 190         ZPOOL_PROP_ASHIFT,
 191         ZPOOL_PROP_COMMENT,
 192         ZPOOL_PROP_EXPANDSZ,
 193         ZPOOL_PROP_FREEING,
 194         ZPOOL_NUM_PROPS
 195 } zpool_prop_t;
 196
 197 /* Small enough to not hog a whole line of printout in zpool(1M). */
 198 #define ZPROP_MAX_COMMENT       32
 199
 200 #define ZPROP_CONT              -2
 201 #define ZPROP_INVAL             -1
 202
 203 #define ZPROP_VALUE             "value"
 204 #define ZPROP_SOURCE            "source"
 205
 206 typedef enum {
 207         ZPROP_SRC_NONE = 0x1,
 208         ZPROP_SRC_DEFAULT = 0x2,
 209         ZPROP_SRC_TEMPORARY = 0x4,
 210         ZPROP_SRC_LOCAL = 0x8,
 211         ZPROP_SRC_INHERITED = 0x10,
 212         ZPROP_SRC_RECEIVED = 0x20
 213 } zprop_source_t;
 214
 215 #define ZPROP_SRC_ALL   0x3f
 216
 217 #define ZPROP_SOURCE_VAL_RECVD  "$recvd"
 218 #define ZPROP_N_MORE_ERRORS     "N_MORE_ERRORS"
 219 /*
 220  * Dataset flag implemented as a special entry in the props zap object
 221  * indicating that the dataset has received properties on or after
 222  * SPA_VERSION_RECVD_PROPS. The first such receive blows away local properties
 223  * just as it did in earlier versions, and thereafter, local properties are
 224  * preserved.
 225  */
 226 #define ZPROP_HAS_RECVD         "$hasrecvd"
 227
 228 typedef enum {
 229         ZPROP_ERR_NOCLEAR = 0x1, /* failure to clear existing props */
 230         ZPROP_ERR_NORESTORE = 0x2 /* failure to restore props on error */
 231 } zprop_errflags_t;
 232
 233 typedef int (*zprop_func)(int, void *);
 234
 235 /*
 236  * Properties to be set on the root file system of a new pool
 237  * are stuffed into their own nvlist, which is then included in
 238  * the properties nvlist with the pool properties.
 239  */
 240 #define ZPOOL_ROOTFS_PROPS      "root-props-nvl"
 241
 242 /*
 243  * Dataset property functions shared between libzfs and kernel.
 244  */
 245 const char *zfs_prop_default_string(zfs_prop_t);
 246 uint64_t zfs_prop_default_numeric(zfs_prop_t);
 247 boolean_t zfs_prop_readonly(zfs_prop_t);
 248 boolean_t zfs_prop_inheritable(zfs_prop_t);
 249 boolean_t zfs_prop_setonce(zfs_prop_t);
 250 const char *zfs_prop_to_name(zfs_prop_t);
 251 zfs_prop_t zfs_name_to_prop(const char *);
 252 boolean_t zfs_prop_user(const char *);
 253 boolean_t zfs_prop_userquota(const char *);
 254 boolean_t zfs_prop_written(const char *);
 255 int zfs_prop_index_to_string(zfs_prop_t, uint64_t, const char **);
 256 int zfs_prop_string_to_index(zfs_prop_t, const char *, uint64_t *);
 257 uint64_t zfs_prop_random_value(zfs_prop_t, uint64_t seed);
 258 boolean_t zfs_prop_valid_for_type(int, zfs_type_t);
 259
 260 /*
 261  * Pool property functions shared between libzfs and kernel.
 262  */
 263 zpool_prop_t zpool_name_to_prop(const char *);
 264 const char *zpool_prop_to_name(zpool_prop_t);
 265 const char *zpool_prop_default_string(zpool_prop_t);
 266 uint64_t zpool_prop_default_numeric(zpool_prop_t);
 267 boolean_t zpool_prop_readonly(zpool_prop_t);
 268 boolean_t zpool_prop_feature(const char *);
 269 boolean_t zpool_prop_unsupported(const char *);
 270 int zpool_prop_index_to_string(zpool_prop_t, uint64_t, const char **);
 271 int zpool_prop_string_to_index(zpool_prop_t, const char *, uint64_t *);
 272 uint64_t zpool_prop_random_value(zpool_prop_t, uint64_t seed);
 273
 274 /*
 275  * Definitions for the Delegation.
 276  */
 277 typedef enum {
 278         ZFS_DELEG_WHO_UNKNOWN = 0,
 279         ZFS_DELEG_USER = 'u',
 280         ZFS_DELEG_USER_SETS = 'U',
 281         ZFS_DELEG_GROUP = 'g',
 282         ZFS_DELEG_GROUP_SETS = 'G',
 283         ZFS_DELEG_EVERYONE = 'e',
 284         ZFS_DELEG_EVERYONE_SETS = 'E',
 285         ZFS_DELEG_CREATE = 'c',
 286         ZFS_DELEG_CREATE_SETS = 'C',
 287         ZFS_DELEG_NAMED_SET = 's',
 288         ZFS_DELEG_NAMED_SET_SETS = 'S'
 289 } zfs_deleg_who_type_t;
 290
 291 typedef enum {
 292         ZFS_DELEG_NONE = 0,
 293         ZFS_DELEG_PERM_LOCAL = 1,
 294         ZFS_DELEG_PERM_DESCENDENT = 2,
 295         ZFS_DELEG_PERM_LOCALDESCENDENT = 3,
 296         ZFS_DELEG_PERM_CREATE = 4
 297 } zfs_deleg_inherit_t;
 298
 299 #define ZFS_DELEG_PERM_UID      "uid"
 300 #define ZFS_DELEG_PERM_GID      "gid"
 301 #define ZFS_DELEG_PERM_GROUPS   "groups"
 302
 303 #define ZFS_MLSLABEL_DEFAULT    "none"
 304
 305 #define ZFS_SMB_ACL_SRC         "src"
 306 #define ZFS_SMB_ACL_TARGET      "target"
 307
 308 typedef enum {
 309         ZFS_CANMOUNT_OFF = 0,
 310         ZFS_CANMOUNT_ON = 1,
 311         ZFS_CANMOUNT_NOAUTO = 2
 312 } zfs_canmount_type_t;
 313
 314 typedef enum {
 315         ZFS_LOGBIAS_LATENCY = 0,
 316         ZFS_LOGBIAS_THROUGHPUT = 1
 317 } zfs_logbias_op_t;
 318
 319 typedef enum zfs_share_op {
 320         ZFS_SHARE_NFS = 0,
 321         ZFS_UNSHARE_NFS = 1,
 322         ZFS_SHARE_SMB = 2,
 323         ZFS_UNSHARE_SMB = 3
 324 } zfs_share_op_t;
 325
 326 typedef enum zfs_smb_acl_op {
 327         ZFS_SMB_ACL_ADD,
 328         ZFS_SMB_ACL_REMOVE,
 329         ZFS_SMB_ACL_RENAME,
 330         ZFS_SMB_ACL_PURGE
 331 } zfs_smb_acl_op_t;
 332
 333 typedef enum zfs_cache_type {
 334         ZFS_CACHE_NONE = 0,
 335         ZFS_CACHE_METADATA = 1,
 336         ZFS_CACHE_ALL = 2
 337 } zfs_cache_type_t;
 338
 339 typedef enum {
 340         ZFS_SYNC_STANDARD = 0,
 341         ZFS_SYNC_ALWAYS = 1,
 342         ZFS_SYNC_DISABLED = 2
 343 } zfs_sync_type_t;
 344
 345 typedef enum {
 346         ZFS_XATTR_OFF = 0,
 347         ZFS_XATTR_DIR = 1,
 348         ZFS_XATTR_SA = 2
 349 } zfs_xattr_type_t;
 350
 351 /*
 352  * On-disk version number.
 353  */
 354 #define SPA_VERSION_1                   1ULL
 355 #define SPA_VERSION_2                   2ULL
 356 #define SPA_VERSION_3                   3ULL
 357 #define SPA_VERSION_4                   4ULL
 358 #define SPA_VERSION_5                   5ULL
 359 #define SPA_VERSION_6                   6ULL
 360 #define SPA_VERSION_7                   7ULL
 361 #define SPA_VERSION_8                   8ULL
 362 #define SPA_VERSION_9                   9ULL
 363 #define SPA_VERSION_10                  10ULL
 364 #define SPA_VERSION_11                  11ULL
 365 #define SPA_VERSION_12                  12ULL
 366 #define SPA_VERSION_13                  13ULL
 367 #define SPA_VERSION_14                  14ULL
 368 #define SPA_VERSION_15                  15ULL
 369 #define SPA_VERSION_16                  16ULL
 370 #define SPA_VERSION_17                  17ULL
 371 #define SPA_VERSION_18                  18ULL
 372 #define SPA_VERSION_19                  19ULL
 373 #define SPA_VERSION_20                  20ULL
 374 #define SPA_VERSION_21                  21ULL
 375 #define SPA_VERSION_22                  22ULL
 376 #define SPA_VERSION_23                  23ULL
 377 #define SPA_VERSION_24                  24ULL
 378 #define SPA_VERSION_25                  25ULL
 379 #define SPA_VERSION_26                  26ULL
 380 #define SPA_VERSION_27                  27ULL
 381 #define SPA_VERSION_28                  28ULL
 382 #define SPA_VERSION_5000                5000ULL
 383
 384 /*
 385  * When bumping up SPA_VERSION, make sure GRUB ZFS understands the on-disk
 386  * format change. Go to usr/src/grub/grub-0.97/stage2/{zfs-include/, fsys_zfs*},
 387  * and do the appropriate changes.  Also bump the version number in
 388  * usr/src/grub/capability.
 389  */
 390 #define SPA_VERSION                     SPA_VERSION_5000
 391 #define SPA_VERSION_STRING              "5000"
 392
 393 /*
 394  * Symbolic names for the changes that caused a SPA_VERSION switch.
 395  * Used in the code when checking for presence or absence of a feature.
 396  * Feel free to define multiple symbolic names for each version if there
 397  * were multiple changes to on-disk structures during that version.
 398  *
 399  * NOTE: When checking the current SPA_VERSION in your code, be sure
 400  *       to use spa_version() since it reports the version of the
 401  *       last synced uberblock.  Checking the in-flight version can
 402  *       be dangerous in some cases.
 403  */
 404 #define SPA_VERSION_INITIAL             SPA_VERSION_1
 405 #define SPA_VERSION_DITTO_BLOCKS        SPA_VERSION_2
 406 #define SPA_VERSION_SPARES              SPA_VERSION_3
 407 #define SPA_VERSION_RAIDZ2              SPA_VERSION_3
 408 #define SPA_VERSION_BPOBJ_ACCOUNT       SPA_VERSION_3
 409 #define SPA_VERSION_RAIDZ_DEFLATE       SPA_VERSION_3
 410 #define SPA_VERSION_DNODE_BYTES         SPA_VERSION_3
 411 #define SPA_VERSION_ZPOOL_HISTORY       SPA_VERSION_4
 412 #define SPA_VERSION_GZIP_COMPRESSION    SPA_VERSION_5
 413 #define SPA_VERSION_BOOTFS              SPA_VERSION_6
 414 #define SPA_VERSION_SLOGS               SPA_VERSION_7
 415 #define SPA_VERSION_DELEGATED_PERMS     SPA_VERSION_8
 416 #define SPA_VERSION_FUID                SPA_VERSION_9
 417 #define SPA_VERSION_REFRESERVATION      SPA_VERSION_9
 418 #define SPA_VERSION_REFQUOTA            SPA_VERSION_9
 419 #define SPA_VERSION_UNIQUE_ACCURATE     SPA_VERSION_9
 420 #define SPA_VERSION_L2CACHE             SPA_VERSION_10
 421 #define SPA_VERSION_NEXT_CLONES         SPA_VERSION_11
 422 #define SPA_VERSION_ORIGIN              SPA_VERSION_11
 423 #define SPA_VERSION_DSL_SCRUB           SPA_VERSION_11
 424 #define SPA_VERSION_SNAP_PROPS          SPA_VERSION_12
 425 #define SPA_VERSION_USED_BREAKDOWN      SPA_VERSION_13
 426 #define SPA_VERSION_PASSTHROUGH_X       SPA_VERSION_14
 427 #define SPA_VERSION_USERSPACE           SPA_VERSION_15
 428 #define SPA_VERSION_STMF_PROP           SPA_VERSION_16
 429 #define SPA_VERSION_RAIDZ3              SPA_VERSION_17
 430 #define SPA_VERSION_USERREFS            SPA_VERSION_18
 431 #define SPA_VERSION_HOLES               SPA_VERSION_19
 432 #define SPA_VERSION_ZLE_COMPRESSION     SPA_VERSION_20
 433 #define SPA_VERSION_DEDUP               SPA_VERSION_21
 434 #define SPA_VERSION_RECVD_PROPS         SPA_VERSION_22
 435 #define SPA_VERSION_SLIM_ZIL            SPA_VERSION_23
 436 #define SPA_VERSION_SA                  SPA_VERSION_24
 437 #define SPA_VERSION_SCAN                SPA_VERSION_25
 438 #define SPA_VERSION_DIR_CLONES          SPA_VERSION_26
 439 #define SPA_VERSION_DEADLISTS           SPA_VERSION_26
 440 #define SPA_VERSION_FAST_SNAP           SPA_VERSION_27
 441 #define SPA_VERSION_MULTI_REPLACE       SPA_VERSION_28
 442 #define SPA_VERSION_BEFORE_FEATURES     SPA_VERSION_28
 443 #define SPA_VERSION_FEATURES            SPA_VERSION_5000
 444
 445 #define SPA_VERSION_IS_SUPPORTED(v) \
 446         (((v) >= SPA_VERSION_INITIAL && (v) <= SPA_VERSION_BEFORE_FEATURES) || \
 447         ((v) >= SPA_VERSION_FEATURES && (v) <= SPA_VERSION))
 448
 449 /*
 450  * ZPL version - rev'd whenever an incompatible on-disk format change
 451  * occurs.  This is independent of SPA/DMU/ZAP versioning.  You must
 452  * also update the version_table[] and help message in zfs_prop.c.
 453  *
 454  * When changing, be sure to teach GRUB how to read the new format!
 455  * See usr/src/grub/grub-0.97/stage2/{zfs-include/,fsys_zfs*}
 456  */
 457 #define ZPL_VERSION_1                   1ULL
 458 #define ZPL_VERSION_2                   2ULL
 459 #define ZPL_VERSION_3                   3ULL
 460 #define ZPL_VERSION_4                   4ULL
 461 #define ZPL_VERSION_5                   5ULL
 462 #define ZPL_VERSION                     ZPL_VERSION_5
 463 #define ZPL_VERSION_STRING              "5"
 464
 465 #define ZPL_VERSION_INITIAL             ZPL_VERSION_1
 466 #define ZPL_VERSION_DIRENT_TYPE         ZPL_VERSION_2
 467 #define ZPL_VERSION_FUID                ZPL_VERSION_3
 468 #define ZPL_VERSION_NORMALIZATION       ZPL_VERSION_3
 469 #define ZPL_VERSION_SYSATTR             ZPL_VERSION_3
 470 #define ZPL_VERSION_USERSPACE           ZPL_VERSION_4
 471 #define ZPL_VERSION_SA                  ZPL_VERSION_5
 472
 473 /* Rewind request information */
 474 #define ZPOOL_NO_REWIND         1  /* No policy - default behavior */
 475 #define ZPOOL_NEVER_REWIND      2  /* Do not search for best txg or rewind */
 476 #define ZPOOL_TRY_REWIND        4  /* Search for best txg, but do not rewind */
 477 #define ZPOOL_DO_REWIND         8  /* Rewind to best txg w/in deferred frees */
 478 #define ZPOOL_EXTREME_REWIND    16 /* Allow extreme measures to find best txg */
 479 #define ZPOOL_REWIND_MASK       28 /* All the possible rewind bits */
 480 #define ZPOOL_REWIND_POLICIES   31 /* All the possible policy bits */
 481
 482 typedef struct zpool_rewind_policy {
 483         uint32_t        zrp_request;    /* rewind behavior requested */
 484         uint64_t        zrp_maxmeta;    /* max acceptable meta-data errors */
 485         uint64_t        zrp_maxdata;    /* max acceptable data errors */
 486         uint64_t        zrp_txg;        /* specific txg to load */
 487 } zpool_rewind_policy_t;
 488
 489 /*
 490  * The following are configuration names used in the nvlist describing a pool's
 491  * configuration.
 492  */
 493 #define ZPOOL_CONFIG_VERSION            "version"
 494 #define ZPOOL_CONFIG_POOL_NAME          "name"
 495 #define ZPOOL_CONFIG_POOL_STATE         "state"
 496 #define ZPOOL_CONFIG_POOL_TXG           "txg"
 497 #define ZPOOL_CONFIG_POOL_GUID          "pool_guid"
 498 #define ZPOOL_CONFIG_CREATE_TXG         "create_txg"
 499 #define ZPOOL_CONFIG_TOP_GUID           "top_guid"
 500 #define ZPOOL_CONFIG_VDEV_TREE          "vdev_tree"
 501 #define ZPOOL_CONFIG_TYPE               "type"
 502 #define ZPOOL_CONFIG_CHILDREN           "children"
 503 #define ZPOOL_CONFIG_ID                 "id"
 504 #define ZPOOL_CONFIG_GUID               "guid"
 505 #define ZPOOL_CONFIG_PATH               "path"
 506 #define ZPOOL_CONFIG_DEVID              "devid"
 507 #define ZPOOL_CONFIG_METASLAB_ARRAY     "metaslab_array"
 508 #define ZPOOL_CONFIG_METASLAB_SHIFT     "metaslab_shift"
 509 #define ZPOOL_CONFIG_ASHIFT             "ashift"
 510 #define ZPOOL_CONFIG_ASIZE              "asize"
 511 #define ZPOOL_CONFIG_DTL                "DTL"
 512 #define ZPOOL_CONFIG_SCAN_STATS         "scan_stats"    /* not stored on disk */
 513 #define ZPOOL_CONFIG_VDEV_STATS         "vdev_stats"    /* not stored on disk */
 514 #define ZPOOL_CONFIG_WHOLE_DISK         "whole_disk"
 515 #define ZPOOL_CONFIG_ERRCOUNT           "error_count"
 516 #define ZPOOL_CONFIG_NOT_PRESENT        "not_present"
 517 #define ZPOOL_CONFIG_SPARES             "spares"
 518 #define ZPOOL_CONFIG_IS_SPARE           "is_spare"
 519 #define ZPOOL_CONFIG_NPARITY            "nparity"
 520 #define ZPOOL_CONFIG_HOSTID             "hostid"
 521 #define ZPOOL_CONFIG_HOSTNAME           "hostname"
 522 #define ZPOOL_CONFIG_LOADED_TIME        "initial_load_time"
 523 #define ZPOOL_CONFIG_UNSPARE            "unspare"
 524 #define ZPOOL_CONFIG_PHYS_PATH          "phys_path"
 525 #define ZPOOL_CONFIG_IS_LOG             "is_log"
 526 #define ZPOOL_CONFIG_L2CACHE            "l2cache"
 527 #define ZPOOL_CONFIG_HOLE_ARRAY         "hole_array"
 528 #define ZPOOL_CONFIG_VDEV_CHILDREN      "vdev_children"
 529 #define ZPOOL_CONFIG_IS_HOLE            "is_hole"
 530 #define ZPOOL_CONFIG_DDT_HISTOGRAM      "ddt_histogram"
 531 #define ZPOOL_CONFIG_DDT_OBJ_STATS      "ddt_object_stats"
 532 #define ZPOOL_CONFIG_DDT_STATS          "ddt_stats"
 533 #define ZPOOL_CONFIG_SPLIT              "splitcfg"
 534 #define ZPOOL_CONFIG_ORIG_GUID          "orig_guid"
 535 #define ZPOOL_CONFIG_SPLIT_GUID         "split_guid"
 536 #define ZPOOL_CONFIG_SPLIT_LIST         "guid_list"
 537 #define ZPOOL_CONFIG_REMOVING           "removing"
 538 #define ZPOOL_CONFIG_RESILVER_TXG       "resilver_txg"
 539 #define ZPOOL_CONFIG_COMMENT            "comment"
 540 #define ZPOOL_CONFIG_SUSPENDED          "suspended"     /* not stored on disk */
 541 #define ZPOOL_CONFIG_TIMESTAMP          "timestamp"     /* not stored on disk */
 542 #define ZPOOL_CONFIG_BOOTFS             "bootfs"        /* not stored on disk */
 543 #define ZPOOL_CONFIG_MISSING_DEVICES    "missing_vdevs" /* not stored on disk */
 544 #define ZPOOL_CONFIG_LOAD_INFO          "load_info"     /* not stored on disk */
 545 #define ZPOOL_CONFIG_REWIND_INFO        "rewind_info"   /* not stored on disk */
 546 #define ZPOOL_CONFIG_UNSUP_FEAT         "unsup_feat"    /* not stored on disk */
 547 #define ZPOOL_CONFIG_ENABLED_FEAT       "enabled_feat"  /* not stored on disk */
 548 #define ZPOOL_CONFIG_CAN_RDONLY         "can_rdonly"    /* not stored on disk */
 549 #define ZPOOL_CONFIG_FEATURES_FOR_READ  "features_for_read"
 550 #define ZPOOL_CONFIG_FEATURE_STATS      "feature_stats" /* not stored on disk */
 551 #define ZPOOL_CONFIG_ERRATA             "errata"        /* not stored on disk */
 552 /*
 553  * The persistent vdev state is stored as separate values rather than a single
 554  * 'vdev_state' entry.  This is because a device can be in multiple states, such
 555  * as offline and degraded.
 556  */
 557 #define ZPOOL_CONFIG_OFFLINE            "offline"
 558 #define ZPOOL_CONFIG_FAULTED            "faulted"
 559 #define ZPOOL_CONFIG_DEGRADED           "degraded"
 560 #define ZPOOL_CONFIG_REMOVED            "removed"
 561 #define ZPOOL_CONFIG_FRU                "fru"
 562 #define ZPOOL_CONFIG_AUX_STATE          "aux_state"
 563
 564 /* Rewind policy parameters */
 565 #define ZPOOL_REWIND_POLICY             "rewind-policy"
 566 #define ZPOOL_REWIND_REQUEST            "rewind-request"
 567 #define ZPOOL_REWIND_REQUEST_TXG        "rewind-request-txg"
 568 #define ZPOOL_REWIND_META_THRESH        "rewind-meta-thresh"
 569 #define ZPOOL_REWIND_DATA_THRESH        "rewind-data-thresh"
 570
 571 /* Rewind data discovered */
 572 #define ZPOOL_CONFIG_LOAD_TIME          "rewind_txg_ts"
 573 #define ZPOOL_CONFIG_LOAD_DATA_ERRORS   "verify_data_errors"
 574 #define ZPOOL_CONFIG_REWIND_TIME        "seconds_of_rewind"
 575
 576 #define VDEV_TYPE_ROOT                  "root"
 577 #define VDEV_TYPE_MIRROR                "mirror"
 578 #define VDEV_TYPE_REPLACING             "replacing"
 579 #define VDEV_TYPE_RAIDZ                 "raidz"
 580 #define VDEV_TYPE_DISK                  "disk"
 581 #define VDEV_TYPE_FILE                  "file"
 582 #define VDEV_TYPE_MISSING               "missing"
 583 #define VDEV_TYPE_HOLE                  "hole"
 584 #define VDEV_TYPE_SPARE                 "spare"
 585 #define VDEV_TYPE_LOG                   "log"
 586 #define VDEV_TYPE_L2CACHE               "l2cache"
 587
 588 /*
 589  * This is needed in userland to report the minimum necessary device size.
 590  */
 591 #define SPA_MINDEVSIZE          (64ULL << 20)
 592
 593 /*
 594  * The location of the pool configuration repository, shared between kernel and
 595  * userland.
 596  */
 597 #define ZPOOL_CACHE             "/etc/zfs/zpool.cache"
 598
 599 /*
 600  * vdev states are ordered from least to most healthy.
 601  * A vdev that's CANT_OPEN or below is considered unusable.
 602  */
 603 typedef enum vdev_state {
 604         VDEV_STATE_UNKNOWN = 0, /* Uninitialized vdev                   */
 605         VDEV_STATE_CLOSED,      /* Not currently open                   */
 606         VDEV_STATE_OFFLINE,     /* Not allowed to open                  */
 607         VDEV_STATE_REMOVED,     /* Explicitly removed from system       */
 608         VDEV_STATE_CANT_OPEN,   /* Tried to open, but failed            */
 609         VDEV_STATE_FAULTED,     /* External request to fault device     */
 610         VDEV_STATE_DEGRADED,    /* Replicated vdev with unhealthy kids  */
 611         VDEV_STATE_HEALTHY      /* Presumed good                        */
 612 } vdev_state_t;
 613
 614 #define VDEV_STATE_ONLINE       VDEV_STATE_HEALTHY
 615
 616 /*
 617  * vdev aux states.  When a vdev is in the CANT_OPEN state, the aux field
 618  * of the vdev stats structure uses these constants to distinguish why.
 619  */
 620 typedef enum vdev_aux {
 621         VDEV_AUX_NONE,          /* no error                             */
 622         VDEV_AUX_OPEN_FAILED,   /* ldi_open_*() or vn_open() failed     */
 623         VDEV_AUX_CORRUPT_DATA,  /* bad label or disk contents           */
 624         VDEV_AUX_NO_REPLICAS,   /* insufficient number of replicas      */
 625         VDEV_AUX_BAD_GUID_SUM,  /* vdev guid sum doesn't match          */
 626         VDEV_AUX_TOO_SMALL,     /* vdev size is too small               */
 627         VDEV_AUX_BAD_LABEL,     /* the label is OK but invalid          */
 628         VDEV_AUX_VERSION_NEWER, /* on-disk version is too new           */
 629         VDEV_AUX_VERSION_OLDER, /* on-disk version is too old           */
 630         VDEV_AUX_UNSUP_FEAT,    /* unsupported features                 */
 631         VDEV_AUX_SPARED,        /* hot spare used in another pool       */
 632         VDEV_AUX_ERR_EXCEEDED,  /* too many errors                      */
 633         VDEV_AUX_IO_FAILURE,    /* experienced I/O failure              */
 634         VDEV_AUX_BAD_LOG,       /* cannot read log chain(s)             */
 635         VDEV_AUX_EXTERNAL,      /* external diagnosis                   */
 636         VDEV_AUX_SPLIT_POOL     /* vdev was split off into another pool */
 637 } vdev_aux_t;
 638
 639 /*
 640  * pool state.  The following states are written to disk as part of the normal
 641  * SPA lifecycle: ACTIVE, EXPORTED, DESTROYED, SPARE, L2CACHE.  The remaining
 642  * states are software abstractions used at various levels to communicate
 643  * pool state.
 644  */
 645 typedef enum pool_state {
 646         POOL_STATE_ACTIVE = 0,          /* In active use                */
 647         POOL_STATE_EXPORTED,            /* Explicitly exported          */
 648         POOL_STATE_DESTROYED,           /* Explicitly destroyed         */
 649         POOL_STATE_SPARE,               /* Reserved for hot spare use   */
 650         POOL_STATE_L2CACHE,             /* Level 2 ARC device           */
 651         POOL_STATE_UNINITIALIZED,       /* Internal spa_t state         */
 652         POOL_STATE_UNAVAIL,             /* Internal libzfs state        */
 653         POOL_STATE_POTENTIALLY_ACTIVE   /* Internal libzfs state        */
 654 } pool_state_t;
 655
 656 /*
 657  * Scan Functions.
 658  */
 659 typedef enum pool_scan_func {
 660         POOL_SCAN_NONE,
 661         POOL_SCAN_SCRUB,
 662         POOL_SCAN_RESILVER,
 663         POOL_SCAN_FUNCS
 664 } pool_scan_func_t;
 665
 666 /*
 667  * ZIO types.  Needed to interpret vdev statistics below.
 668  */
 669 typedef enum zio_type {
 670         ZIO_TYPE_NULL = 0,
 671         ZIO_TYPE_READ,
 672         ZIO_TYPE_WRITE,
 673         ZIO_TYPE_FREE,
 674         ZIO_TYPE_CLAIM,
 675         ZIO_TYPE_IOCTL,
 676         ZIO_TYPES
 677 } zio_type_t;
 678
 679 /*
 680  * Pool statistics.  Note: all fields should be 64-bit because this
 681  * is passed between kernel and userland as an nvlist uint64 array.
 682  */
 683 typedef struct pool_scan_stat {
 684         /* values stored on disk */
 685         uint64_t        pss_func;       /* pool_scan_func_t */
 686         uint64_t        pss_state;      /* dsl_scan_state_t */
 687         uint64_t        pss_start_time; /* scan start time */
 688         uint64_t        pss_end_time;   /* scan end time */
 689         uint64_t        pss_to_examine; /* total bytes to scan */
 690         uint64_t        pss_examined;   /* total examined bytes */
 691         uint64_t        pss_to_process; /* total bytes to process */
 692         uint64_t        pss_processed;  /* total processed bytes */
 693         uint64_t        pss_errors;     /* scan errors  */
 694
 695         /* values not stored on disk */
 696         uint64_t        pss_pass_exam;  /* examined bytes per scan pass */
 697         uint64_t        pss_pass_start; /* start time of a scan pass */
 698 } pool_scan_stat_t;
 699
 700 typedef enum dsl_scan_state {
 701         DSS_NONE,
 702         DSS_SCANNING,
 703         DSS_FINISHED,
 704         DSS_CANCELED,
 705         DSS_NUM_STATES
 706 } dsl_scan_state_t;
 707
 708 /*
 709  * Errata described by http://zfsonlinux.org/msg/ZFS-8000-ER.  The ordering
 710  * of this enum must be maintained to ensure the errata identifiers map to
 711  * the correct documentation.  New errata may only be appended to the list
 712  * and must contain corresponding documentation at the above link.
 713  */
 714 typedef enum zpool_errata {
 715         ZPOOL_ERRATA_NONE,
 716 } zpool_errata_t;
 717
 718 /*
 719  * Vdev statistics.  Note: all fields should be 64-bit because this
 720  * is passed between kernel and userland as an nvlist uint64 array.
 721  */
 722 typedef struct vdev_stat {
 723         hrtime_t        vs_timestamp;           /* time since vdev load */
 724         uint64_t        vs_state;               /* vdev state           */
 725         uint64_t        vs_aux;                 /* see vdev_aux_t       */
 726         uint64_t        vs_alloc;               /* space allocated      */
 727         uint64_t        vs_space;               /* total capacity       */
 728         uint64_t        vs_dspace;              /* deflated capacity    */
 729         uint64_t        vs_rsize;               /* replaceable dev size */
 730         uint64_t        vs_esize;               /* expandable dev size */
 731         uint64_t        vs_ops[ZIO_TYPES];      /* operation count      */
 732         uint64_t        vs_bytes[ZIO_TYPES];    /* bytes read/written   */
 733         uint64_t        vs_read_errors;         /* read errors          */
 734         uint64_t        vs_write_errors;        /* write errors         */
 735         uint64_t        vs_checksum_errors;     /* checksum errors      */
 736         uint64_t        vs_self_healed;         /* self-healed bytes    */
 737         uint64_t        vs_scan_removing;       /* removing?    */
 738         uint64_t        vs_scan_processed;      /* scan processed bytes */
 739 } vdev_stat_t;
 740
 741 /*
 742  * DDT statistics.  Note: all fields should be 64-bit because this
 743  * is passed between kernel and userland as an nvlist uint64 array.
 744  */
 745 typedef struct ddt_object {
 746         uint64_t        ddo_count;      /* number of elments in ddt     */
 747         uint64_t        ddo_dspace;     /* size of ddt on disk          */
 748         uint64_t        ddo_mspace;     /* size of ddt in-core          */
 749 } ddt_object_t;
 750
 751 typedef struct ddt_stat {
 752         uint64_t        dds_blocks;     /* blocks                       */
 753         uint64_t        dds_lsize;      /* logical size                 */
 754         uint64_t        dds_psize;      /* physical size                */
 755         uint64_t        dds_dsize;      /* deflated allocated size      */
 756         uint64_t        dds_ref_blocks; /* referenced blocks            */
 757         uint64_t        dds_ref_lsize;  /* referenced lsize * refcnt    */
 758         uint64_t        dds_ref_psize;  /* referenced psize * refcnt    */
 759         uint64_t        dds_ref_dsize;  /* referenced dsize * refcnt    */
 760 } ddt_stat_t;
 761
 762 typedef struct ddt_histogram {
 763         ddt_stat_t      ddh_stat[64];   /* power-of-two histogram buckets */
 764 } ddt_histogram_t;
 765
 766 #define ZVOL_DRIVER     "zvol"
 767 #define ZFS_DRIVER      "zfs"
 768 #define ZFS_DEV         "/dev/zfs"
 769
 770 /* general zvol path */
 771 #define ZVOL_DIR        "/dev"
 772
 773 #define ZVOL_MAJOR              230
 774 #define ZVOL_MINOR_BITS         4
 775 #define ZVOL_MINOR_MASK         ((1U << ZVOL_MINOR_BITS) - 1)
 776 #define ZVOL_MINORS             (1 << 4)
 777 #define ZVOL_DEV_NAME           "zd"
 778
 779 #define ZVOL_PROP_NAME          "name"
 780 #define ZVOL_DEFAULT_BLOCKSIZE  8192
 781
 782 /*
 783  * /dev/zfs ioctl numbers.
 784  */
 785 typedef enum zfs_ioc {
 786         /*
 787          * Illumos - 69/128 numbers reserved.
 788          */
 789         ZFS_IOC_FIRST = ('Z' << 8),
 790         ZFS_IOC = ZFS_IOC_FIRST,
 791         ZFS_IOC_POOL_CREATE = ZFS_IOC_FIRST,
 792         ZFS_IOC_POOL_DESTROY,
 793         ZFS_IOC_POOL_IMPORT,
 794         ZFS_IOC_POOL_EXPORT,
 795         ZFS_IOC_POOL_CONFIGS,
 796         ZFS_IOC_POOL_STATS,
 797         ZFS_IOC_POOL_TRYIMPORT,
 798         ZFS_IOC_POOL_SCAN,
 799         ZFS_IOC_POOL_FREEZE,
 800         ZFS_IOC_POOL_UPGRADE,
 801         ZFS_IOC_POOL_GET_HISTORY,
 802         ZFS_IOC_VDEV_ADD,
 803         ZFS_IOC_VDEV_REMOVE,
 804         ZFS_IOC_VDEV_SET_STATE,
 805         ZFS_IOC_VDEV_ATTACH,
 806         ZFS_IOC_VDEV_DETACH,
 807         ZFS_IOC_VDEV_SETPATH,
 808         ZFS_IOC_VDEV_SETFRU,
 809         ZFS_IOC_OBJSET_STATS,
 810         ZFS_IOC_OBJSET_ZPLPROPS,
 811         ZFS_IOC_DATASET_LIST_NEXT,
 812         ZFS_IOC_SNAPSHOT_LIST_NEXT,
 813         ZFS_IOC_SET_PROP,
 814         ZFS_IOC_CREATE,
 815         ZFS_IOC_DESTROY,
 816         ZFS_IOC_ROLLBACK,
 817         ZFS_IOC_RENAME,
 818         ZFS_IOC_RECV,
 819         ZFS_IOC_SEND,
 820         ZFS_IOC_INJECT_FAULT,
 821         ZFS_IOC_CLEAR_FAULT,
 822         ZFS_IOC_INJECT_LIST_NEXT,
 823         ZFS_IOC_ERROR_LOG,
 824         ZFS_IOC_CLEAR,
 825         ZFS_IOC_PROMOTE,
 826         ZFS_IOC_SNAPSHOT,
 827         ZFS_IOC_DSOBJ_TO_DSNAME,
 828         ZFS_IOC_OBJ_TO_PATH,
 829         ZFS_IOC_POOL_SET_PROPS,
 830         ZFS_IOC_POOL_GET_PROPS,
 831         ZFS_IOC_SET_FSACL,
 832         ZFS_IOC_GET_FSACL,
 833         ZFS_IOC_SHARE,
 834         ZFS_IOC_INHERIT_PROP,
 835         ZFS_IOC_SMB_ACL,
 836         ZFS_IOC_USERSPACE_ONE,
 837         ZFS_IOC_USERSPACE_MANY,
 838         ZFS_IOC_USERSPACE_UPGRADE,
 839         ZFS_IOC_HOLD,
 840         ZFS_IOC_RELEASE,
 841         ZFS_IOC_GET_HOLDS,
 842         ZFS_IOC_OBJSET_RECVD_PROPS,
 843         ZFS_IOC_VDEV_SPLIT,
 844         ZFS_IOC_NEXT_OBJ,
 845         ZFS_IOC_DIFF,
 846         ZFS_IOC_TMP_SNAPSHOT,
 847         ZFS_IOC_OBJ_TO_STATS,
 848         ZFS_IOC_SPACE_WRITTEN,
 849         ZFS_IOC_SPACE_SNAPS,
 850         ZFS_IOC_DESTROY_SNAPS,
 851         ZFS_IOC_POOL_REGUID,
 852         ZFS_IOC_POOL_REOPEN,
 853         ZFS_IOC_SEND_PROGRESS,
 854         ZFS_IOC_LOG_HISTORY,
 855         ZFS_IOC_SEND_NEW,
 856         ZFS_IOC_SEND_SPACE,
 857         ZFS_IOC_CLONE,
 858
 859         /*
 860          * Linux - 3/64 numbers reserved.
 861          */
 862         ZFS_IOC_LINUX = ('Z' << 8) + 0x80,
 863         ZFS_IOC_EVENTS_NEXT,
 864         ZFS_IOC_EVENTS_CLEAR,
 865
 866         /*
 867          * FreeBSD - 1/64 numbers reserved.
 868          */
 869         ZFS_IOC_FREEBSD = ('Z' << 8) + 0xC0,
 870
 871         ZFS_IOC_LAST
 872 } zfs_ioc_t;
 873
 874 /*
 875  * zvol ioctl to get dataset name
 876  */
 877 #define BLKZNAME                _IOR(0x12, 125, char[ZFS_MAXNAMELEN])
 878
 879 /*
 880  * Internal SPA load state.  Used by FMA diagnosis engine.
 881  */
 882 typedef enum {
 883         SPA_LOAD_NONE,          /* no load in progress  */
 884         SPA_LOAD_OPEN,          /* normal open          */
 885         SPA_LOAD_IMPORT,        /* import in progress   */
 886         SPA_LOAD_TRYIMPORT,     /* tryimport in progress */
 887         SPA_LOAD_RECOVER,       /* recovery requested   */
 888         SPA_LOAD_ERROR          /* load failed          */
 889 } spa_load_state_t;
 890
 891 /*
 892  * Bookmark name values.
 893  */
 894 #define ZPOOL_ERR_LIST          "error list"
 895 #define ZPOOL_ERR_DATASET       "dataset"
 896 #define ZPOOL_ERR_OBJECT        "object"
 897
 898 #define HIS_MAX_RECORD_LEN      (MAXPATHLEN + MAXPATHLEN + 1)
 899
 900 /*
 901  * The following are names used in the nvlist describing
 902  * the pool's history log.
 903  */
 904 #define ZPOOL_HIST_RECORD       "history record"
 905 #define ZPOOL_HIST_TIME         "history time"
 906 #define ZPOOL_HIST_CMD          "history command"
 907 #define ZPOOL_HIST_WHO          "history who"
 908 #define ZPOOL_HIST_ZONE         "history zone"
 909 #define ZPOOL_HIST_HOST         "history hostname"
 910 #define ZPOOL_HIST_TXG          "history txg"
 911 #define ZPOOL_HIST_INT_EVENT    "history internal event"
 912 #define ZPOOL_HIST_INT_STR      "history internal str"
 913 #define ZPOOL_HIST_INT_NAME     "internal_name"
 914 #define ZPOOL_HIST_IOCTL        "ioctl"
 915 #define ZPOOL_HIST_INPUT_NVL    "in_nvl"
 916 #define ZPOOL_HIST_OUTPUT_NVL   "out_nvl"
 917 #define ZPOOL_HIST_DSNAME       "dsname"
 918 #define ZPOOL_HIST_DSID         "dsid"
 919
 920 /*
 921  * Flags for ZFS_IOC_VDEV_SET_STATE
 922  */
 923 #define ZFS_ONLINE_CHECKREMOVE  0x1
 924 #define ZFS_ONLINE_UNSPARE      0x2
 925 #define ZFS_ONLINE_FORCEFAULT   0x4
 926 #define ZFS_ONLINE_EXPAND       0x8
 927 #define ZFS_OFFLINE_TEMPORARY   0x1
 928
 929 /*
 930  * Flags for ZFS_IOC_POOL_IMPORT
 931  */
 932 #define ZFS_IMPORT_NORMAL       0x0
 933 #define ZFS_IMPORT_VERBATIM     0x1
 934 #define ZFS_IMPORT_ANY_HOST     0x2
 935 #define ZFS_IMPORT_MISSING_LOG  0x4
 936 #define ZFS_IMPORT_ONLY         0x8
 937
 938 /*
 939  * Sysevent payload members.  ZFS will generate the following sysevents with the
 940  * given payloads:
 941  *
 942  *      ESC_ZFS_RESILVER_START
 943  *      ESC_ZFS_RESILVER_END
 944  *      ESC_ZFS_POOL_DESTROY
 945  *      ESC_ZFS_POOL_REGUID
 946  *
 947  *              ZFS_EV_POOL_NAME        DATA_TYPE_STRING
 948  *              ZFS_EV_POOL_GUID        DATA_TYPE_UINT64
 949  *
 950  *      ESC_ZFS_VDEV_REMOVE
 951  *      ESC_ZFS_VDEV_CLEAR
 952  *      ESC_ZFS_VDEV_CHECK
 953  *
 954  *              ZFS_EV_POOL_NAME        DATA_TYPE_STRING
 955  *              ZFS_EV_POOL_GUID        DATA_TYPE_UINT64
 956  *              ZFS_EV_VDEV_PATH        DATA_TYPE_STRING        (optional)
 957  *              ZFS_EV_VDEV_GUID        DATA_TYPE_UINT64
 958  */
 959 #define ZFS_EV_POOL_NAME        "pool_name"
 960 #define ZFS_EV_POOL_GUID        "pool_guid"
 961 #define ZFS_EV_VDEV_PATH        "vdev_path"
 962 #define ZFS_EV_VDEV_GUID        "vdev_guid"
 963
 964 #ifdef  __cplusplus
 965 }
 966 #endif
 967
 968 #endif  /* _SYS_FS_ZFS_H */