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