include/sys/fs/zfs.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Copyright (c) 2011, 2014 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     = (1 << 0),
  50         ZFS_TYPE_SNAPSHOT       = (1 << 1),
  51         ZFS_TYPE_VOLUME         = (1 << 2),
  52         ZFS_TYPE_POOL           = (1 << 3),
  53         ZFS_TYPE_BOOKMARK       = (1 << 4)
  54 } zfs_type_t;
  55
  56 typedef enum dmu_objset_type {
  57         DMU_OST_NONE,
  58         DMU_OST_META,
  59         DMU_OST_ZFS,
  60         DMU_OST_ZVOL,
  61         DMU_OST_OTHER,                  /* For testing only! */
  62         DMU_OST_ANY,                    /* Be careful! */
  63         DMU_OST_NUMTYPES
  64 } dmu_objset_type_t;
  65
  66 #define ZFS_TYPE_DATASET        \
  67         (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME | ZFS_TYPE_SNAPSHOT)
  68
  69 #define ZAP_MAXNAMELEN 256
  70 #define ZAP_MAXVALUELEN (1024 * 8)
  71 #define ZAP_OLDMAXVALUELEN 1024
  72
  73 /*
  74  * Dataset properties are identified by these constants and must be added to
  75  * the end of this list to ensure that external consumers are not affected
  76  * by the change. If you make any changes to this list, be sure to update
  77  * the property table in module/zcommon/zfs_prop.c.
  78  */
  79 typedef enum {
  80         ZFS_PROP_TYPE,
  81         ZFS_PROP_CREATION,
  82         ZFS_PROP_USED,
  83         ZFS_PROP_AVAILABLE,
  84         ZFS_PROP_REFERENCED,
  85         ZFS_PROP_COMPRESSRATIO,
  86         ZFS_PROP_MOUNTED,
  87         ZFS_PROP_ORIGIN,
  88         ZFS_PROP_QUOTA,
  89         ZFS_PROP_RESERVATION,
  90         ZFS_PROP_VOLSIZE,
  91         ZFS_PROP_VOLBLOCKSIZE,
  92         ZFS_PROP_RECORDSIZE,
  93         ZFS_PROP_MOUNTPOINT,
  94         ZFS_PROP_SHARENFS,
  95         ZFS_PROP_CHECKSUM,
  96         ZFS_PROP_COMPRESSION,
  97         ZFS_PROP_ATIME,
  98         ZFS_PROP_DEVICES,
  99         ZFS_PROP_EXEC,
 100         ZFS_PROP_SETUID,
 101         ZFS_PROP_READONLY,
 102         ZFS_PROP_ZONED,
 103         ZFS_PROP_SNAPDIR,
 104         ZFS_PROP_PRIVATE,               /* not exposed to user, temporary */
 105         ZFS_PROP_ACLINHERIT,
 106         ZFS_PROP_CREATETXG,             /* not exposed to the user */
 107         ZFS_PROP_NAME,                  /* not exposed to the user */
 108         ZFS_PROP_CANMOUNT,
 109         ZFS_PROP_ISCSIOPTIONS,          /* not exposed to the user */
 110         ZFS_PROP_XATTR,
 111         ZFS_PROP_NUMCLONES,             /* not exposed to the user */
 112         ZFS_PROP_COPIES,
 113         ZFS_PROP_VERSION,
 114         ZFS_PROP_UTF8ONLY,
 115         ZFS_PROP_NORMALIZE,
 116         ZFS_PROP_CASE,
 117         ZFS_PROP_VSCAN,
 118         ZFS_PROP_NBMAND,
 119         ZFS_PROP_SHARESMB,
 120         ZFS_PROP_REFQUOTA,
 121         ZFS_PROP_REFRESERVATION,
 122         ZFS_PROP_GUID,
 123         ZFS_PROP_PRIMARYCACHE,
 124         ZFS_PROP_SECONDARYCACHE,
 125         ZFS_PROP_USEDSNAP,
 126         ZFS_PROP_USEDDS,
 127         ZFS_PROP_USEDCHILD,
 128         ZFS_PROP_USEDREFRESERV,
 129         ZFS_PROP_USERACCOUNTING,        /* not exposed to the user */
 130         ZFS_PROP_STMF_SHAREINFO,        /* not exposed to the user */
 131         ZFS_PROP_DEFER_DESTROY,
 132         ZFS_PROP_USERREFS,
 133         ZFS_PROP_LOGBIAS,
 134         ZFS_PROP_UNIQUE,                /* not exposed to the user */
 135         ZFS_PROP_OBJSETID,              /* not exposed to the user */
 136         ZFS_PROP_DEDUP,
 137         ZFS_PROP_MLSLABEL,
 138         ZFS_PROP_SYNC,
 139         ZFS_PROP_REFRATIO,
 140         ZFS_PROP_WRITTEN,
 141         ZFS_PROP_CLONES,
 142         ZFS_PROP_LOGICALUSED,
 143         ZFS_PROP_LOGICALREFERENCED,
 144         ZFS_PROP_INCONSISTENT,          /* not exposed to the user */
 145         ZFS_PROP_SNAPDEV,
 146         ZFS_PROP_ACLTYPE,
 147         ZFS_PROP_SELINUX_CONTEXT,
 148         ZFS_PROP_SELINUX_FSCONTEXT,
 149         ZFS_PROP_SELINUX_DEFCONTEXT,
 150         ZFS_PROP_SELINUX_ROOTCONTEXT,
 151         ZFS_PROP_RELATIME,
 152         ZFS_PROP_REDUNDANT_METADATA,
 153         ZFS_NUM_PROPS
 154 } zfs_prop_t;
 155
 156 typedef enum {
 157         ZFS_PROP_USERUSED,
 158         ZFS_PROP_USERQUOTA,
 159         ZFS_PROP_GROUPUSED,
 160         ZFS_PROP_GROUPQUOTA,
 161         ZFS_NUM_USERQUOTA_PROPS
 162 } zfs_userquota_prop_t;
 163
 164 extern const char *zfs_userquota_prop_prefixes[ZFS_NUM_USERQUOTA_PROPS];
 165
 166 /*
 167  * Pool properties are identified by these constants and must be added to the
 168  * end of this list to ensure that external consumers are not affected
 169  * by the change. If you make any changes to this list, be sure to update
 170  * the property table in module/zcommon/zpool_prop.c.
 171  */
 172 typedef enum {
 173         ZPOOL_PROP_NAME,
 174         ZPOOL_PROP_SIZE,
 175         ZPOOL_PROP_CAPACITY,
 176         ZPOOL_PROP_ALTROOT,
 177         ZPOOL_PROP_HEALTH,
 178         ZPOOL_PROP_GUID,
 179         ZPOOL_PROP_VERSION,
 180         ZPOOL_PROP_BOOTFS,
 181         ZPOOL_PROP_DELEGATION,
 182         ZPOOL_PROP_AUTOREPLACE,
 183         ZPOOL_PROP_CACHEFILE,
 184         ZPOOL_PROP_FAILUREMODE,
 185         ZPOOL_PROP_LISTSNAPS,
 186         ZPOOL_PROP_AUTOEXPAND,
 187         ZPOOL_PROP_DEDUPDITTO,
 188         ZPOOL_PROP_DEDUPRATIO,
 189         ZPOOL_PROP_FREE,
 190         ZPOOL_PROP_ALLOCATED,
 191         ZPOOL_PROP_READONLY,
 192         ZPOOL_PROP_ASHIFT,
 193         ZPOOL_PROP_COMMENT,
 194         ZPOOL_PROP_EXPANDSZ,
 195         ZPOOL_PROP_FREEING,
 196         ZPOOL_NUM_PROPS
 197 } zpool_prop_t;
 198
 199 /* Small enough to not hog a whole line of printout in zpool(1M). */
 200 #define ZPROP_MAX_COMMENT       32
 201
 202 #define ZPROP_CONT              -2
 203 #define ZPROP_INVAL             -1
 204
 205 #define ZPROP_VALUE             "value"
 206 #define ZPROP_SOURCE            "source"
 207
 208 typedef enum {
 209         ZPROP_SRC_NONE = 0x1,
 210         ZPROP_SRC_DEFAULT = 0x2,
 211         ZPROP_SRC_TEMPORARY = 0x4,
 212         ZPROP_SRC_LOCAL = 0x8,
 213         ZPROP_SRC_INHERITED = 0x10,
 214         ZPROP_SRC_RECEIVED = 0x20
 215 } zprop_source_t;
 216
 217 #define ZPROP_SRC_ALL   0x3f
 218
 219 #define ZPROP_SOURCE_VAL_RECVD  "$recvd"
 220 #define ZPROP_N_MORE_ERRORS     "N_MORE_ERRORS"
 221 /*
 222  * Dataset flag implemented as a special entry in the props zap object
 223  * indicating that the dataset has received properties on or after
 224  * SPA_VERSION_RECVD_PROPS. The first such receive blows away local properties
 225  * just as it did in earlier versions, and thereafter, local properties are
 226  * preserved.
 227  */
 228 #define ZPROP_HAS_RECVD         "$hasrecvd"
 229
 230 typedef enum {
 231         ZPROP_ERR_NOCLEAR = 0x1, /* failure to clear existing props */
 232         ZPROP_ERR_NORESTORE = 0x2 /* failure to restore props on error */
 233 } zprop_errflags_t;
 234
 235 typedef int (*zprop_func)(int, void *);
 236
 237 /*
 238  * Properties to be set on the root file system of a new pool
 239  * are stuffed into their own nvlist, which is then included in
 240  * the properties nvlist with the pool properties.
 241  */
 242 #define ZPOOL_ROOTFS_PROPS      "root-props-nvl"
 243
 244 /*
 245  * Dataset property functions shared between libzfs and kernel.
 246  */
 247 const char *zfs_prop_default_string(zfs_prop_t);
 248 uint64_t zfs_prop_default_numeric(zfs_prop_t);
 249 boolean_t zfs_prop_readonly(zfs_prop_t);
 250 boolean_t zfs_prop_inheritable(zfs_prop_t);
 251 boolean_t zfs_prop_setonce(zfs_prop_t);
 252 const char *zfs_prop_to_name(zfs_prop_t);
 253 zfs_prop_t zfs_name_to_prop(const char *);
 254 boolean_t zfs_prop_user(const char *);
 255 boolean_t zfs_prop_userquota(const char *);
 256 boolean_t zfs_prop_written(const char *);
 257 int zfs_prop_index_to_string(zfs_prop_t, uint64_t, const char **);
 258 int zfs_prop_string_to_index(zfs_prop_t, const char *, uint64_t *);
 259 uint64_t zfs_prop_random_value(zfs_prop_t, uint64_t seed);
 260 boolean_t zfs_prop_valid_for_type(int, zfs_type_t, boolean_t);
 261
 262 /*
 263  * Pool property functions shared between libzfs and kernel.
 264  */
 265 zpool_prop_t zpool_name_to_prop(const char *);
 266 const char *zpool_prop_to_name(zpool_prop_t);
 267 const char *zpool_prop_default_string(zpool_prop_t);
 268 uint64_t zpool_prop_default_numeric(zpool_prop_t);
 269 boolean_t zpool_prop_readonly(zpool_prop_t);
 270 boolean_t zpool_prop_feature(const char *);
 271 boolean_t zpool_prop_unsupported(const char *);
 272 int zpool_prop_index_to_string(zpool_prop_t, uint64_t, const char **);
 273 int zpool_prop_string_to_index(zpool_prop_t, const char *, uint64_t *);
 274 uint64_t zpool_prop_random_value(zpool_prop_t, uint64_t seed);
 275
 276 /*
 277  * Definitions for the Delegation.
 278  */
 279 typedef enum {
 280         ZFS_DELEG_WHO_UNKNOWN = 0,
 281         ZFS_DELEG_USER = 'u',
 282         ZFS_DELEG_USER_SETS = 'U',
 283         ZFS_DELEG_GROUP = 'g',
 284         ZFS_DELEG_GROUP_SETS = 'G',
 285         ZFS_DELEG_EVERYONE = 'e',
 286         ZFS_DELEG_EVERYONE_SETS = 'E',
 287         ZFS_DELEG_CREATE = 'c',
 288         ZFS_DELEG_CREATE_SETS = 'C',
 289         ZFS_DELEG_NAMED_SET = 's',
 290         ZFS_DELEG_NAMED_SET_SETS = 'S'
 291 } zfs_deleg_who_type_t;
 292
 293 typedef enum {
 294         ZFS_DELEG_NONE = 0,
 295         ZFS_DELEG_PERM_LOCAL = 1,
 296         ZFS_DELEG_PERM_DESCENDENT = 2,
 297         ZFS_DELEG_PERM_LOCALDESCENDENT = 3,
 298         ZFS_DELEG_PERM_CREATE = 4
 299 } zfs_deleg_inherit_t;
 300
 301 #define ZFS_DELEG_PERM_UID      "uid"
 302 #define ZFS_DELEG_PERM_GID      "gid"
 303 #define ZFS_DELEG_PERM_GROUPS   "groups"
 304
 305 #define ZFS_MLSLABEL_DEFAULT    "none"
 306
 307 #define ZFS_SMB_ACL_SRC         "src"
 308 #define ZFS_SMB_ACL_TARGET      "target"
 309
 310 typedef enum {
 311         ZFS_CANMOUNT_OFF = 0,
 312         ZFS_CANMOUNT_ON = 1,
 313         ZFS_CANMOUNT_NOAUTO = 2
 314 } zfs_canmount_type_t;
 315
 316 typedef enum {
 317         ZFS_LOGBIAS_LATENCY = 0,
 318         ZFS_LOGBIAS_THROUGHPUT = 1
 319 } zfs_logbias_op_t;
 320
 321 typedef enum zfs_share_op {
 322         ZFS_SHARE_NFS = 0,
 323         ZFS_UNSHARE_NFS = 1,
 324         ZFS_SHARE_SMB = 2,
 325         ZFS_UNSHARE_SMB = 3
 326 } zfs_share_op_t;
 327
 328 typedef enum zfs_smb_acl_op {
 329         ZFS_SMB_ACL_ADD,
 330         ZFS_SMB_ACL_REMOVE,
 331         ZFS_SMB_ACL_RENAME,
 332         ZFS_SMB_ACL_PURGE
 333 } zfs_smb_acl_op_t;
 334
 335 typedef enum zfs_cache_type {
 336         ZFS_CACHE_NONE = 0,
 337         ZFS_CACHE_METADATA = 1,
 338         ZFS_CACHE_ALL = 2
 339 } zfs_cache_type_t;
 340
 341 typedef enum {
 342         ZFS_SYNC_STANDARD = 0,
 343         ZFS_SYNC_ALWAYS = 1,
 344         ZFS_SYNC_DISABLED = 2
 345 } zfs_sync_type_t;
 346
 347 typedef enum {
 348         ZFS_XATTR_OFF = 0,
 349         ZFS_XATTR_DIR = 1,
 350         ZFS_XATTR_SA = 2
 351 } zfs_xattr_type_t;
 352
 353 typedef enum {
 354         ZFS_REDUNDANT_METADATA_ALL,
 355         ZFS_REDUNDANT_METADATA_MOST
 356 } zfs_redundant_metadata_type_t;
 357
 358 /*
 359  * On-disk version number.
 360  */
 361 #define SPA_VERSION_1                   1ULL
 362 #define SPA_VERSION_2                   2ULL
 363 #define SPA_VERSION_3                   3ULL
 364 #define SPA_VERSION_4                   4ULL
 365 #define SPA_VERSION_5                   5ULL
 366 #define SPA_VERSION_6                   6ULL
 367 #define SPA_VERSION_7                   7ULL
 368 #define SPA_VERSION_8                   8ULL
 369 #define SPA_VERSION_9                   9ULL
 370 #define SPA_VERSION_10                  10ULL
 371 #define SPA_VERSION_11                  11ULL
 372 #define SPA_VERSION_12                  12ULL
 373 #define SPA_VERSION_13                  13ULL
 374 #define SPA_VERSION_14                  14ULL
 375 #define SPA_VERSION_15                  15ULL
 376 #define SPA_VERSION_16                  16ULL
 377 #define SPA_VERSION_17                  17ULL
 378 #define SPA_VERSION_18                  18ULL
 379 #define SPA_VERSION_19                  19ULL
 380 #define SPA_VERSION_20                  20ULL
 381 #define SPA_VERSION_21                  21ULL
 382 #define SPA_VERSION_22                  22ULL
 383 #define SPA_VERSION_23                  23ULL
 384 #define SPA_VERSION_24                  24ULL
 385 #define SPA_VERSION_25                  25ULL
 386 #define SPA_VERSION_26                  26ULL
 387 #define SPA_VERSION_27                  27ULL
 388 #define SPA_VERSION_28                  28ULL
 389 #define SPA_VERSION_5000                5000ULL
 390
 391 /*
 392  * When bumping up SPA_VERSION, make sure GRUB ZFS understands the on-disk
 393  * format change. Go to usr/src/grub/grub-0.97/stage2/{zfs-include/, fsys_zfs*},
 394  * and do the appropriate changes.  Also bump the version number in
 395  * usr/src/grub/capability.
 396  */
 397 #define SPA_VERSION                     SPA_VERSION_5000
 398 #define SPA_VERSION_STRING              "5000"
 399
 400 /*
 401  * Symbolic names for the changes that caused a SPA_VERSION switch.
 402  * Used in the code when checking for presence or absence of a feature.
 403  * Feel free to define multiple symbolic names for each version if there
 404  * were multiple changes to on-disk structures during that version.
 405  *
 406  * NOTE: When checking the current SPA_VERSION in your code, be sure
 407  *       to use spa_version() since it reports the version of the
 408  *       last synced uberblock.  Checking the in-flight version can
 409  *       be dangerous in some cases.
 410  */
 411 #define SPA_VERSION_INITIAL             SPA_VERSION_1
 412 #define SPA_VERSION_DITTO_BLOCKS        SPA_VERSION_2
 413 #define SPA_VERSION_SPARES              SPA_VERSION_3
 414 #define SPA_VERSION_RAIDZ2              SPA_VERSION_3
 415 #define SPA_VERSION_BPOBJ_ACCOUNT       SPA_VERSION_3
 416 #define SPA_VERSION_RAIDZ_DEFLATE       SPA_VERSION_3
 417 #define SPA_VERSION_DNODE_BYTES         SPA_VERSION_3
 418 #define SPA_VERSION_ZPOOL_HISTORY       SPA_VERSION_4
 419 #define SPA_VERSION_GZIP_COMPRESSION    SPA_VERSION_5
 420 #define SPA_VERSION_BOOTFS              SPA_VERSION_6
 421 #define SPA_VERSION_SLOGS               SPA_VERSION_7
 422 #define SPA_VERSION_DELEGATED_PERMS     SPA_VERSION_8
 423 #define SPA_VERSION_FUID                SPA_VERSION_9
 424 #define SPA_VERSION_REFRESERVATION      SPA_VERSION_9
 425 #define SPA_VERSION_REFQUOTA            SPA_VERSION_9
 426 #define SPA_VERSION_UNIQUE_ACCURATE     SPA_VERSION_9
 427 #define SPA_VERSION_L2CACHE             SPA_VERSION_10
 428 #define SPA_VERSION_NEXT_CLONES         SPA_VERSION_11
 429 #define SPA_VERSION_ORIGIN              SPA_VERSION_11
 430 #define SPA_VERSION_DSL_SCRUB           SPA_VERSION_11
 431 #define SPA_VERSION_SNAP_PROPS          SPA_VERSION_12
 432 #define SPA_VERSION_USED_BREAKDOWN      SPA_VERSION_13
 433 #define SPA_VERSION_PASSTHROUGH_X       SPA_VERSION_14
 434 #define SPA_VERSION_USERSPACE           SPA_VERSION_15
 435 #define SPA_VERSION_STMF_PROP           SPA_VERSION_16
 436 #define SPA_VERSION_RAIDZ3              SPA_VERSION_17
 437 #define SPA_VERSION_USERREFS            SPA_VERSION_18
 438 #define SPA_VERSION_HOLES               SPA_VERSION_19
 439 #define SPA_VERSION_ZLE_COMPRESSION     SPA_VERSION_20
 440 #define SPA_VERSION_DEDUP               SPA_VERSION_21
 441 #define SPA_VERSION_RECVD_PROPS         SPA_VERSION_22
 442 #define SPA_VERSION_SLIM_ZIL            SPA_VERSION_23
 443 #define SPA_VERSION_SA                  SPA_VERSION_24
 444 #define SPA_VERSION_SCAN                SPA_VERSION_25
 445 #define SPA_VERSION_DIR_CLONES          SPA_VERSION_26
 446 #define SPA_VERSION_DEADLISTS           SPA_VERSION_26
 447 #define SPA_VERSION_FAST_SNAP           SPA_VERSION_27
 448 #define SPA_VERSION_MULTI_REPLACE       SPA_VERSION_28
 449 #define SPA_VERSION_BEFORE_FEATURES     SPA_VERSION_28
 450 #define SPA_VERSION_FEATURES            SPA_VERSION_5000
 451
 452 #define SPA_VERSION_IS_SUPPORTED(v) \
 453         (((v) >= SPA_VERSION_INITIAL && (v) <= SPA_VERSION_BEFORE_FEATURES) || \
 454         ((v) >= SPA_VERSION_FEATURES && (v) <= SPA_VERSION))
 455
 456 /*
 457  * ZPL version - rev'd whenever an incompatible on-disk format change
 458  * occurs.  This is independent of SPA/DMU/ZAP versioning.  You must
 459  * also update the version_table[] and help message in zfs_prop.c.
 460  *
 461  * When changing, be sure to teach GRUB how to read the new format!
 462  * See usr/src/grub/grub-0.97/stage2/{zfs-include/,fsys_zfs*}
 463  */
 464 #define ZPL_VERSION_1                   1ULL
 465 #define ZPL_VERSION_2                   2ULL
 466 #define ZPL_VERSION_3                   3ULL
 467 #define ZPL_VERSION_4                   4ULL
 468 #define ZPL_VERSION_5                   5ULL
 469 #define ZPL_VERSION                     ZPL_VERSION_5
 470 #define ZPL_VERSION_STRING              "5"
 471
 472 #define ZPL_VERSION_INITIAL             ZPL_VERSION_1
 473 #define ZPL_VERSION_DIRENT_TYPE         ZPL_VERSION_2
 474 #define ZPL_VERSION_FUID                ZPL_VERSION_3
 475 #define ZPL_VERSION_NORMALIZATION       ZPL_VERSION_3
 476 #define ZPL_VERSION_SYSATTR             ZPL_VERSION_3
 477 #define ZPL_VERSION_USERSPACE           ZPL_VERSION_4
 478 #define ZPL_VERSION_SA                  ZPL_VERSION_5
 479
 480 /* Rewind request information */
 481 #define ZPOOL_NO_REWIND         1  /* No policy - default behavior */
 482 #define ZPOOL_NEVER_REWIND      2  /* Do not search for best txg or rewind */
 483 #define ZPOOL_TRY_REWIND        4  /* Search for best txg, but do not rewind */
 484 #define ZPOOL_DO_REWIND         8  /* Rewind to best txg w/in deferred frees */
 485 #define ZPOOL_EXTREME_REWIND    16 /* Allow extreme measures to find best txg */
 486 #define ZPOOL_REWIND_MASK       28 /* All the possible rewind bits */
 487 #define ZPOOL_REWIND_POLICIES   31 /* All the possible policy bits */
 488
 489 typedef struct zpool_rewind_policy {
 490         uint32_t        zrp_request;    /* rewind behavior requested */
 491         uint64_t        zrp_maxmeta;    /* max acceptable meta-data errors */
 492         uint64_t        zrp_maxdata;    /* max acceptable data errors */
 493         uint64_t        zrp_txg;        /* specific txg to load */
 494 } zpool_rewind_policy_t;
 495
 496 /*
 497  * The following are configuration names used in the nvlist describing a pool's
 498  * configuration.
 499  */
 500 #define ZPOOL_CONFIG_VERSION            "version"
 501 #define ZPOOL_CONFIG_POOL_NAME          "name"
 502 #define ZPOOL_CONFIG_POOL_STATE         "state"
 503 #define ZPOOL_CONFIG_POOL_TXG           "txg"
 504 #define ZPOOL_CONFIG_POOL_GUID          "pool_guid"
 505 #define ZPOOL_CONFIG_CREATE_TXG         "create_txg"
 506 #define ZPOOL_CONFIG_TOP_GUID           "top_guid"
 507 #define ZPOOL_CONFIG_VDEV_TREE          "vdev_tree"
 508 #define ZPOOL_CONFIG_TYPE               "type"
 509 #define ZPOOL_CONFIG_CHILDREN           "children"
 510 #define ZPOOL_CONFIG_ID                 "id"
 511 #define ZPOOL_CONFIG_GUID               "guid"
 512 #define ZPOOL_CONFIG_PATH               "path"
 513 #define ZPOOL_CONFIG_DEVID              "devid"
 514 #define ZPOOL_CONFIG_METASLAB_ARRAY     "metaslab_array"
 515 #define ZPOOL_CONFIG_METASLAB_SHIFT     "metaslab_shift"
 516 #define ZPOOL_CONFIG_ASHIFT             "ashift"
 517 #define ZPOOL_CONFIG_ASIZE              "asize"
 518 #define ZPOOL_CONFIG_DTL                "DTL"
 519 #define ZPOOL_CONFIG_SCAN_STATS         "scan_stats"    /* not stored on disk */
 520 #define ZPOOL_CONFIG_VDEV_STATS         "vdev_stats"    /* not stored on disk */
 521 #define ZPOOL_CONFIG_WHOLE_DISK         "whole_disk"
 522 #define ZPOOL_CONFIG_ERRCOUNT           "error_count"
 523 #define ZPOOL_CONFIG_NOT_PRESENT        "not_present"
 524 #define ZPOOL_CONFIG_SPARES             "spares"
 525 #define ZPOOL_CONFIG_IS_SPARE           "is_spare"
 526 #define ZPOOL_CONFIG_NPARITY            "nparity"
 527 #define ZPOOL_CONFIG_HOSTID             "hostid"
 528 #define ZPOOL_CONFIG_HOSTNAME           "hostname"
 529 #define ZPOOL_CONFIG_LOADED_TIME        "initial_load_time"
 530 #define ZPOOL_CONFIG_UNSPARE            "unspare"
 531 #define ZPOOL_CONFIG_PHYS_PATH          "phys_path"
 532 #define ZPOOL_CONFIG_IS_LOG             "is_log"
 533 #define ZPOOL_CONFIG_L2CACHE            "l2cache"
 534 #define ZPOOL_CONFIG_HOLE_ARRAY         "hole_array"
 535 #define ZPOOL_CONFIG_VDEV_CHILDREN      "vdev_children"
 536 #define ZPOOL_CONFIG_IS_HOLE            "is_hole"
 537 #define ZPOOL_CONFIG_DDT_HISTOGRAM      "ddt_histogram"
 538 #define ZPOOL_CONFIG_DDT_OBJ_STATS      "ddt_object_stats"
 539 #define ZPOOL_CONFIG_DDT_STATS          "ddt_stats"
 540 #define ZPOOL_CONFIG_SPLIT              "splitcfg"
 541 #define ZPOOL_CONFIG_ORIG_GUID          "orig_guid"
 542 #define ZPOOL_CONFIG_SPLIT_GUID         "split_guid"
 543 #define ZPOOL_CONFIG_SPLIT_LIST         "guid_list"
 544 #define ZPOOL_CONFIG_REMOVING           "removing"
 545 #define ZPOOL_CONFIG_RESILVER_TXG       "resilver_txg"
 546 #define ZPOOL_CONFIG_COMMENT            "comment"
 547 #define ZPOOL_CONFIG_SUSPENDED          "suspended"     /* not stored on disk */
 548 #define ZPOOL_CONFIG_TIMESTAMP          "timestamp"     /* not stored on disk */
 549 #define ZPOOL_CONFIG_BOOTFS             "bootfs"        /* not stored on disk */
 550 #define ZPOOL_CONFIG_MISSING_DEVICES    "missing_vdevs" /* not stored on disk */
 551 #define ZPOOL_CONFIG_LOAD_INFO          "load_info"     /* not stored on disk */
 552 #define ZPOOL_CONFIG_REWIND_INFO        "rewind_info"   /* not stored on disk */
 553 #define ZPOOL_CONFIG_UNSUP_FEAT         "unsup_feat"    /* not stored on disk */
 554 #define ZPOOL_CONFIG_ENABLED_FEAT       "enabled_feat"  /* not stored on disk */
 555 #define ZPOOL_CONFIG_CAN_RDONLY         "can_rdonly"    /* not stored on disk */
 556 #define ZPOOL_CONFIG_FEATURES_FOR_READ  "features_for_read"
 557 #define ZPOOL_CONFIG_FEATURE_STATS      "feature_stats" /* not stored on disk */
 558 #define ZPOOL_CONFIG_ERRATA             "errata"        /* not stored on disk */
 559 /*
 560  * The persistent vdev state is stored as separate values rather than a single
 561  * 'vdev_state' entry.  This is because a device can be in multiple states, such
 562  * as offline and degraded.
 563  */
 564 #define ZPOOL_CONFIG_OFFLINE            "offline"
 565 #define ZPOOL_CONFIG_FAULTED            "faulted"
 566 #define ZPOOL_CONFIG_DEGRADED           "degraded"
 567 #define ZPOOL_CONFIG_REMOVED            "removed"
 568 #define ZPOOL_CONFIG_FRU                "fru"
 569 #define ZPOOL_CONFIG_AUX_STATE          "aux_state"
 570
 571 /* Rewind policy parameters */
 572 #define ZPOOL_REWIND_POLICY             "rewind-policy"
 573 #define ZPOOL_REWIND_REQUEST            "rewind-request"
 574 #define ZPOOL_REWIND_REQUEST_TXG        "rewind-request-txg"
 575 #define ZPOOL_REWIND_META_THRESH        "rewind-meta-thresh"
 576 #define ZPOOL_REWIND_DATA_THRESH        "rewind-data-thresh"
 577
 578 /* Rewind data discovered */
 579 #define ZPOOL_CONFIG_LOAD_TIME          "rewind_txg_ts"
 580 #define ZPOOL_CONFIG_LOAD_DATA_ERRORS   "verify_data_errors"
 581 #define ZPOOL_CONFIG_REWIND_TIME        "seconds_of_rewind"
 582
 583 #define VDEV_TYPE_ROOT                  "root"
 584 #define VDEV_TYPE_MIRROR                "mirror"
 585 #define VDEV_TYPE_REPLACING             "replacing"
 586 #define VDEV_TYPE_RAIDZ                 "raidz"
 587 #define VDEV_TYPE_DISK                  "disk"
 588 #define VDEV_TYPE_FILE                  "file"
 589 #define VDEV_TYPE_MISSING               "missing"
 590 #define VDEV_TYPE_HOLE                  "hole"
 591 #define VDEV_TYPE_SPARE                 "spare"
 592 #define VDEV_TYPE_LOG                   "log"
 593 #define VDEV_TYPE_L2CACHE               "l2cache"
 594
 595 /*
 596  * This is needed in userland to report the minimum necessary device size.
 597  */
 598 #define SPA_MINDEVSIZE          (64ULL << 20)
 599
 600 /*
 601  * The location of the pool configuration repository, shared between kernel and
 602  * userland.
 603  */
 604 #define ZPOOL_CACHE             "/etc/zfs/zpool.cache"
 605
 606 /*
 607  * vdev states are ordered from least to most healthy.
 608  * A vdev that's CANT_OPEN or below is considered unusable.
 609  */
 610 typedef enum vdev_state {
 611         VDEV_STATE_UNKNOWN = 0, /* Uninitialized vdev                   */
 612         VDEV_STATE_CLOSED,      /* Not currently open                   */
 613         VDEV_STATE_OFFLINE,     /* Not allowed to open                  */
 614         VDEV_STATE_REMOVED,     /* Explicitly removed from system       */
 615         VDEV_STATE_CANT_OPEN,   /* Tried to open, but failed            */
 616         VDEV_STATE_FAULTED,     /* External request to fault device     */
 617         VDEV_STATE_DEGRADED,    /* Replicated vdev with unhealthy kids  */
 618         VDEV_STATE_HEALTHY      /* Presumed good                        */
 619 } vdev_state_t;
 620
 621 #define VDEV_STATE_ONLINE       VDEV_STATE_HEALTHY
 622
 623 /*
 624  * vdev aux states.  When a vdev is in the CANT_OPEN state, the aux field
 625  * of the vdev stats structure uses these constants to distinguish why.
 626  */
 627 typedef enum vdev_aux {
 628         VDEV_AUX_NONE,          /* no error                             */
 629         VDEV_AUX_OPEN_FAILED,   /* ldi_open_*() or vn_open() failed     */
 630         VDEV_AUX_CORRUPT_DATA,  /* bad label or disk contents           */
 631         VDEV_AUX_NO_REPLICAS,   /* insufficient number of replicas      */
 632         VDEV_AUX_BAD_GUID_SUM,  /* vdev guid sum doesn't match          */
 633         VDEV_AUX_TOO_SMALL,     /* vdev size is too small               */
 634         VDEV_AUX_BAD_LABEL,     /* the label is OK but invalid          */
 635         VDEV_AUX_VERSION_NEWER, /* on-disk version is too new           */
 636         VDEV_AUX_VERSION_OLDER, /* on-disk version is too old           */
 637         VDEV_AUX_UNSUP_FEAT,    /* unsupported features                 */
 638         VDEV_AUX_SPARED,        /* hot spare used in another pool       */
 639         VDEV_AUX_ERR_EXCEEDED,  /* too many errors                      */
 640         VDEV_AUX_IO_FAILURE,    /* experienced I/O failure              */
 641         VDEV_AUX_BAD_LOG,       /* cannot read log chain(s)             */
 642         VDEV_AUX_EXTERNAL,      /* external diagnosis                   */
 643         VDEV_AUX_SPLIT_POOL     /* vdev was split off into another pool */
 644 } vdev_aux_t;
 645
 646 /*
 647  * pool state.  The following states are written to disk as part of the normal
 648  * SPA lifecycle: ACTIVE, EXPORTED, DESTROYED, SPARE, L2CACHE.  The remaining
 649  * states are software abstractions used at various levels to communicate
 650  * pool state.
 651  */
 652 typedef enum pool_state {
 653         POOL_STATE_ACTIVE = 0,          /* In active use                */
 654         POOL_STATE_EXPORTED,            /* Explicitly exported          */
 655         POOL_STATE_DESTROYED,           /* Explicitly destroyed         */
 656         POOL_STATE_SPARE,               /* Reserved for hot spare use   */
 657         POOL_STATE_L2CACHE,             /* Level 2 ARC device           */
 658         POOL_STATE_UNINITIALIZED,       /* Internal spa_t state         */
 659         POOL_STATE_UNAVAIL,             /* Internal libzfs state        */
 660         POOL_STATE_POTENTIALLY_ACTIVE   /* Internal libzfs state        */
 661 } pool_state_t;
 662
 663 /*
 664  * Scan Functions.
 665  */
 666 typedef enum pool_scan_func {
 667         POOL_SCAN_NONE,
 668         POOL_SCAN_SCRUB,
 669         POOL_SCAN_RESILVER,
 670         POOL_SCAN_FUNCS
 671 } pool_scan_func_t;
 672
 673 /*
 674  * ZIO types.  Needed to interpret vdev statistics below.
 675  */
 676 typedef enum zio_type {
 677         ZIO_TYPE_NULL = 0,
 678         ZIO_TYPE_READ,
 679         ZIO_TYPE_WRITE,
 680         ZIO_TYPE_FREE,
 681         ZIO_TYPE_CLAIM,
 682         ZIO_TYPE_IOCTL,
 683         ZIO_TYPES
 684 } zio_type_t;
 685
 686 /*
 687  * Pool statistics.  Note: all fields should be 64-bit because this
 688  * is passed between kernel and userland as an nvlist uint64 array.
 689  */
 690 typedef struct pool_scan_stat {
 691         /* values stored on disk */
 692         uint64_t        pss_func;       /* pool_scan_func_t */
 693         uint64_t        pss_state;      /* dsl_scan_state_t */
 694         uint64_t        pss_start_time; /* scan start time */
 695         uint64_t        pss_end_time;   /* scan end time */
 696         uint64_t        pss_to_examine; /* total bytes to scan */
 697         uint64_t        pss_examined;   /* total examined bytes */
 698         uint64_t        pss_to_process; /* total bytes to process */
 699         uint64_t        pss_processed;  /* total processed bytes */
 700         uint64_t        pss_errors;     /* scan errors  */
 701
 702         /* values not stored on disk */
 703         uint64_t        pss_pass_exam;  /* examined bytes per scan pass */
 704         uint64_t        pss_pass_start; /* start time of a scan pass */
 705 } pool_scan_stat_t;
 706
 707 typedef enum dsl_scan_state {
 708         DSS_NONE,
 709         DSS_SCANNING,
 710         DSS_FINISHED,
 711         DSS_CANCELED,
 712         DSS_NUM_STATES
 713 } dsl_scan_state_t;
 714
 715 /*
 716  * Errata described by http://zfsonlinux.org/msg/ZFS-8000-ER.  The ordering
 717  * of this enum must be maintained to ensure the errata identifiers map to
 718  * the correct documentation.  New errata may only be appended to the list
 719  * and must contain corresponding documentation at the above link.
 720  */
 721 typedef enum zpool_errata {
 722         ZPOOL_ERRATA_NONE,
 723         ZPOOL_ERRATA_ZOL_2094_SCRUB,
 724         ZPOOL_ERRATA_ZOL_2094_ASYNC_DESTROY,
 725 } zpool_errata_t;
 726
 727 /*
 728  * Vdev statistics.  Note: all fields should be 64-bit because this
 729  * is passed between kernel and userland as an nvlist uint64 array.
 730  */
 731 typedef struct vdev_stat {
 732         hrtime_t        vs_timestamp;           /* time since vdev load */
 733         uint64_t        vs_state;               /* vdev state           */
 734         uint64_t        vs_aux;                 /* see vdev_aux_t       */
 735         uint64_t        vs_alloc;               /* space allocated      */
 736         uint64_t        vs_space;               /* total capacity       */
 737         uint64_t        vs_dspace;              /* deflated capacity    */
 738         uint64_t        vs_rsize;               /* replaceable dev size */
 739         uint64_t        vs_esize;               /* expandable dev size */
 740         uint64_t        vs_ops[ZIO_TYPES];      /* operation count      */
 741         uint64_t        vs_bytes[ZIO_TYPES];    /* bytes read/written   */
 742         uint64_t        vs_read_errors;         /* read errors          */
 743         uint64_t        vs_write_errors;        /* write errors         */
 744         uint64_t        vs_checksum_errors;     /* checksum errors      */
 745         uint64_t        vs_self_healed;         /* self-healed bytes    */
 746         uint64_t        vs_scan_removing;       /* removing?    */
 747         uint64_t        vs_scan_processed;      /* scan processed bytes */
 748 } vdev_stat_t;
 749
 750 /*
 751  * DDT statistics.  Note: all fields should be 64-bit because this
 752  * is passed between kernel and userland as an nvlist uint64 array.
 753  */
 754 typedef struct ddt_object {
 755         uint64_t        ddo_count;      /* number of elments in ddt     */
 756         uint64_t        ddo_dspace;     /* size of ddt on disk          */
 757         uint64_t        ddo_mspace;     /* size of ddt in-core          */
 758 } ddt_object_t;
 759
 760 typedef struct ddt_stat {
 761         uint64_t        dds_blocks;     /* blocks                       */
 762         uint64_t        dds_lsize;      /* logical size                 */
 763         uint64_t        dds_psize;      /* physical size                */
 764         uint64_t        dds_dsize;      /* deflated allocated size      */
 765         uint64_t        dds_ref_blocks; /* referenced blocks            */
 766         uint64_t        dds_ref_lsize;  /* referenced lsize * refcnt    */
 767         uint64_t        dds_ref_psize;  /* referenced psize * refcnt    */
 768         uint64_t        dds_ref_dsize;  /* referenced dsize * refcnt    */
 769 } ddt_stat_t;
 770
 771 typedef struct ddt_histogram {
 772         ddt_stat_t      ddh_stat[64];   /* power-of-two histogram buckets */
 773 } ddt_histogram_t;
 774
 775 #define ZVOL_DRIVER     "zvol"
 776 #define ZFS_DRIVER      "zfs"
 777 #define ZFS_DEV         "/dev/zfs"
 778
 779 /* general zvol path */
 780 #define ZVOL_DIR        "/dev"
 781
 782 #define ZVOL_MAJOR              230
 783 #define ZVOL_MINOR_BITS         4
 784 #define ZVOL_MINOR_MASK         ((1U << ZVOL_MINOR_BITS) - 1)
 785 #define ZVOL_MINORS             (1 << 4)
 786 #define ZVOL_DEV_NAME           "zd"
 787
 788 #define ZVOL_PROP_NAME          "name"
 789 #define ZVOL_DEFAULT_BLOCKSIZE  8192
 790
 791 /*
 792  * /dev/zfs ioctl numbers.
 793  */
 794 typedef enum zfs_ioc {
 795         /*
 796          * Illumos - 70/128 numbers reserved.
 797          */
 798         ZFS_IOC_FIRST = ('Z' << 8),
 799         ZFS_IOC = ZFS_IOC_FIRST,
 800         ZFS_IOC_POOL_CREATE = ZFS_IOC_FIRST,
 801         ZFS_IOC_POOL_DESTROY,
 802         ZFS_IOC_POOL_IMPORT,
 803         ZFS_IOC_POOL_EXPORT,
 804         ZFS_IOC_POOL_CONFIGS,
 805         ZFS_IOC_POOL_STATS,
 806         ZFS_IOC_POOL_TRYIMPORT,
 807         ZFS_IOC_POOL_SCAN,
 808         ZFS_IOC_POOL_FREEZE,
 809         ZFS_IOC_POOL_UPGRADE,
 810         ZFS_IOC_POOL_GET_HISTORY,
 811         ZFS_IOC_VDEV_ADD,
 812         ZFS_IOC_VDEV_REMOVE,
 813         ZFS_IOC_VDEV_SET_STATE,
 814         ZFS_IOC_VDEV_ATTACH,
 815         ZFS_IOC_VDEV_DETACH,
 816         ZFS_IOC_VDEV_SETPATH,
 817         ZFS_IOC_VDEV_SETFRU,
 818         ZFS_IOC_OBJSET_STATS,
 819         ZFS_IOC_OBJSET_ZPLPROPS,
 820         ZFS_IOC_DATASET_LIST_NEXT,
 821         ZFS_IOC_SNAPSHOT_LIST_NEXT,
 822         ZFS_IOC_SET_PROP,
 823         ZFS_IOC_CREATE,
 824         ZFS_IOC_DESTROY,
 825         ZFS_IOC_ROLLBACK,
 826         ZFS_IOC_RENAME,
 827         ZFS_IOC_RECV,
 828         ZFS_IOC_SEND,
 829         ZFS_IOC_INJECT_FAULT,
 830         ZFS_IOC_CLEAR_FAULT,
 831         ZFS_IOC_INJECT_LIST_NEXT,
 832         ZFS_IOC_ERROR_LOG,
 833         ZFS_IOC_CLEAR,
 834         ZFS_IOC_PROMOTE,
 835         ZFS_IOC_SNAPSHOT,
 836         ZFS_IOC_DSOBJ_TO_DSNAME,
 837         ZFS_IOC_OBJ_TO_PATH,
 838         ZFS_IOC_POOL_SET_PROPS,
 839         ZFS_IOC_POOL_GET_PROPS,
 840         ZFS_IOC_SET_FSACL,
 841         ZFS_IOC_GET_FSACL,
 842         ZFS_IOC_SHARE,
 843         ZFS_IOC_INHERIT_PROP,
 844         ZFS_IOC_SMB_ACL,
 845         ZFS_IOC_USERSPACE_ONE,
 846         ZFS_IOC_USERSPACE_MANY,
 847         ZFS_IOC_USERSPACE_UPGRADE,
 848         ZFS_IOC_HOLD,
 849         ZFS_IOC_RELEASE,
 850         ZFS_IOC_GET_HOLDS,
 851         ZFS_IOC_OBJSET_RECVD_PROPS,
 852         ZFS_IOC_VDEV_SPLIT,
 853         ZFS_IOC_NEXT_OBJ,
 854         ZFS_IOC_DIFF,
 855         ZFS_IOC_TMP_SNAPSHOT,
 856         ZFS_IOC_OBJ_TO_STATS,
 857         ZFS_IOC_SPACE_WRITTEN,
 858         ZFS_IOC_SPACE_SNAPS,
 859         ZFS_IOC_DESTROY_SNAPS,
 860         ZFS_IOC_POOL_REGUID,
 861         ZFS_IOC_POOL_REOPEN,
 862         ZFS_IOC_SEND_PROGRESS,
 863         ZFS_IOC_LOG_HISTORY,
 864         ZFS_IOC_SEND_NEW,
 865         ZFS_IOC_SEND_SPACE,
 866         ZFS_IOC_CLONE,
 867         ZFS_IOC_BOOKMARK,
 868         ZFS_IOC_GET_BOOKMARKS,
 869         ZFS_IOC_DESTROY_BOOKMARKS,
 870
 871         /*
 872          * Linux - 3/64 numbers reserved.
 873          */
 874         ZFS_IOC_LINUX = ('Z' << 8) + 0x80,
 875         ZFS_IOC_EVENTS_NEXT,
 876         ZFS_IOC_EVENTS_CLEAR,
 877         ZFS_IOC_EVENTS_SEEK,
 878
 879         /*
 880          * FreeBSD - 1/64 numbers reserved.
 881          */
 882         ZFS_IOC_FREEBSD = ('Z' << 8) + 0xC0,
 883
 884         ZFS_IOC_LAST
 885 } zfs_ioc_t;
 886
 887 /*
 888  * zvol ioctl to get dataset name
 889  */
 890 #define BLKZNAME                _IOR(0x12, 125, char[ZFS_MAXNAMELEN])
 891
 892 /*
 893  * Internal SPA load state.  Used by FMA diagnosis engine.
 894  */
 895 typedef enum {
 896         SPA_LOAD_NONE,          /* no load in progress  */
 897         SPA_LOAD_OPEN,          /* normal open          */
 898         SPA_LOAD_IMPORT,        /* import in progress   */
 899         SPA_LOAD_TRYIMPORT,     /* tryimport in progress */
 900         SPA_LOAD_RECOVER,       /* recovery requested   */
 901         SPA_LOAD_ERROR          /* load failed          */
 902 } spa_load_state_t;
 903
 904 /*
 905  * Bookmark name values.
 906  */
 907 #define ZPOOL_ERR_LIST          "error list"
 908 #define ZPOOL_ERR_DATASET       "dataset"
 909 #define ZPOOL_ERR_OBJECT        "object"
 910
 911 #define HIS_MAX_RECORD_LEN      (MAXPATHLEN + MAXPATHLEN + 1)
 912
 913 /*
 914  * The following are names used in the nvlist describing
 915  * the pool's history log.
 916  */
 917 #define ZPOOL_HIST_RECORD       "history record"
 918 #define ZPOOL_HIST_TIME         "history time"
 919 #define ZPOOL_HIST_CMD          "history command"
 920 #define ZPOOL_HIST_WHO          "history who"
 921 #define ZPOOL_HIST_ZONE         "history zone"
 922 #define ZPOOL_HIST_HOST         "history hostname"
 923 #define ZPOOL_HIST_TXG          "history txg"
 924 #define ZPOOL_HIST_INT_EVENT    "history internal event"
 925 #define ZPOOL_HIST_INT_STR      "history internal str"
 926 #define ZPOOL_HIST_INT_NAME     "internal_name"
 927 #define ZPOOL_HIST_IOCTL        "ioctl"
 928 #define ZPOOL_HIST_INPUT_NVL    "in_nvl"
 929 #define ZPOOL_HIST_OUTPUT_NVL   "out_nvl"
 930 #define ZPOOL_HIST_DSNAME       "dsname"
 931 #define ZPOOL_HIST_DSID         "dsid"
 932
 933 /*
 934  * Flags for ZFS_IOC_VDEV_SET_STATE
 935  */
 936 #define ZFS_ONLINE_CHECKREMOVE  0x1
 937 #define ZFS_ONLINE_UNSPARE      0x2
 938 #define ZFS_ONLINE_FORCEFAULT   0x4
 939 #define ZFS_ONLINE_EXPAND       0x8
 940 #define ZFS_OFFLINE_TEMPORARY   0x1
 941
 942 /*
 943  * Flags for ZFS_IOC_POOL_IMPORT
 944  */
 945 #define ZFS_IMPORT_NORMAL       0x0
 946 #define ZFS_IMPORT_VERBATIM     0x1
 947 #define ZFS_IMPORT_ANY_HOST     0x2
 948 #define ZFS_IMPORT_MISSING_LOG  0x4
 949 #define ZFS_IMPORT_ONLY         0x8
 950 #define ZFS_IMPORT_TEMP_NAME    0x10
 951
 952 /*
 953  * Sysevent payload members.  ZFS will generate the following sysevents with the
 954  * given payloads:
 955  *
 956  *      ESC_ZFS_RESILVER_START
 957  *      ESC_ZFS_RESILVER_END
 958  *      ESC_ZFS_POOL_DESTROY
 959  *      ESC_ZFS_POOL_REGUID
 960  *
 961  *              ZFS_EV_POOL_NAME        DATA_TYPE_STRING
 962  *              ZFS_EV_POOL_GUID        DATA_TYPE_UINT64
 963  *
 964  *      ESC_ZFS_VDEV_REMOVE
 965  *      ESC_ZFS_VDEV_CLEAR
 966  *      ESC_ZFS_VDEV_CHECK
 967  *
 968  *              ZFS_EV_POOL_NAME        DATA_TYPE_STRING
 969  *              ZFS_EV_POOL_GUID        DATA_TYPE_UINT64
 970  *              ZFS_EV_VDEV_PATH        DATA_TYPE_STRING        (optional)
 971  *              ZFS_EV_VDEV_GUID        DATA_TYPE_UINT64
 972  */
 973 #define ZFS_EV_POOL_NAME        "pool_name"
 974 #define ZFS_EV_POOL_GUID        "pool_guid"
 975 #define ZFS_EV_VDEV_PATH        "vdev_path"
 976 #define ZFS_EV_VDEV_GUID        "vdev_guid"
 977
 978 #ifdef  __cplusplus
 979 }
 980 #endif
 981
 982 #endif  /* _SYS_FS_ZFS_H */