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) 2013, 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 #include <sys/zio_priority.h>
  36
  37 #ifdef  __cplusplus
  38 extern "C" {
  39 #endif
  40
  41 /*
  42  * Types and constants shared between userland and the kernel.
  43  */
  44
  45 /*
  46  * Each dataset can be one of the following types.  These constants can be
  47  * combined into masks that can be passed to various functions.
  48  */
  49 typedef enum {
  50         ZFS_TYPE_FILESYSTEM     = (1 << 0),
  51         ZFS_TYPE_SNAPSHOT       = (1 << 1),
  52         ZFS_TYPE_VOLUME         = (1 << 2),
  53         ZFS_TYPE_POOL           = (1 << 3),
  54         ZFS_TYPE_BOOKMARK       = (1 << 4)
  55 } zfs_type_t;
  56
  57 typedef enum dmu_objset_type {
  58         DMU_OST_NONE,
  59         DMU_OST_META,
  60         DMU_OST_ZFS,
  61         DMU_OST_ZVOL,
  62         DMU_OST_OTHER,                  /* For testing only! */
  63         DMU_OST_ANY,                    /* Be careful! */
  64         DMU_OST_NUMTYPES
  65 } dmu_objset_type_t;
  66
  67 #define ZFS_TYPE_DATASET        \
  68         (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME | ZFS_TYPE_SNAPSHOT)
  69
  70 /*
  71  * All of these include the terminating NUL byte.
  72  */
  73 #define ZAP_MAXNAMELEN 256
  74 #define ZAP_MAXVALUELEN (1024 * 8)
  75 #define ZAP_OLDMAXVALUELEN 1024
  76 #define ZFS_MAX_DATASET_NAME_LEN 256
  77
  78 /*
  79  * Dataset properties are identified by these constants and must be added to
  80  * the end of this list to ensure that external consumers are not affected
  81  * by the change. If you make any changes to this list, be sure to update
  82  * the property table in module/zcommon/zfs_prop.c.
  83  */
  84 typedef enum {
  85         ZFS_PROP_BAD = -1,
  86         ZFS_PROP_TYPE = 0,
  87         ZFS_PROP_CREATION,
  88         ZFS_PROP_USED,
  89         ZFS_PROP_AVAILABLE,
  90         ZFS_PROP_REFERENCED,
  91         ZFS_PROP_COMPRESSRATIO,
  92         ZFS_PROP_MOUNTED,
  93         ZFS_PROP_ORIGIN,
  94         ZFS_PROP_QUOTA,
  95         ZFS_PROP_RESERVATION,
  96         ZFS_PROP_VOLSIZE,
  97         ZFS_PROP_VOLBLOCKSIZE,
  98         ZFS_PROP_RECORDSIZE,
  99         ZFS_PROP_MOUNTPOINT,
 100         ZFS_PROP_SHARENFS,
 101         ZFS_PROP_CHECKSUM,
 102         ZFS_PROP_COMPRESSION,
 103         ZFS_PROP_ATIME,
 104         ZFS_PROP_DEVICES,
 105         ZFS_PROP_EXEC,
 106         ZFS_PROP_SETUID,
 107         ZFS_PROP_READONLY,
 108         ZFS_PROP_ZONED,
 109         ZFS_PROP_SNAPDIR,
 110         ZFS_PROP_PRIVATE,               /* not exposed to user, temporary */
 111         ZFS_PROP_ACLINHERIT,
 112         ZFS_PROP_CREATETXG,             /* not exposed to the user */
 113         ZFS_PROP_NAME,                  /* not exposed to the user */
 114         ZFS_PROP_CANMOUNT,
 115         ZFS_PROP_ISCSIOPTIONS,          /* not exposed to the user */
 116         ZFS_PROP_XATTR,
 117         ZFS_PROP_NUMCLONES,             /* not exposed to the user */
 118         ZFS_PROP_COPIES,
 119         ZFS_PROP_VERSION,
 120         ZFS_PROP_UTF8ONLY,
 121         ZFS_PROP_NORMALIZE,
 122         ZFS_PROP_CASE,
 123         ZFS_PROP_VSCAN,
 124         ZFS_PROP_NBMAND,
 125         ZFS_PROP_SHARESMB,
 126         ZFS_PROP_REFQUOTA,
 127         ZFS_PROP_REFRESERVATION,
 128         ZFS_PROP_GUID,
 129         ZFS_PROP_PRIMARYCACHE,
 130         ZFS_PROP_SECONDARYCACHE,
 131         ZFS_PROP_USEDSNAP,
 132         ZFS_PROP_USEDDS,
 133         ZFS_PROP_USEDCHILD,
 134         ZFS_PROP_USEDREFRESERV,
 135         ZFS_PROP_USERACCOUNTING,        /* not exposed to the user */
 136         ZFS_PROP_STMF_SHAREINFO,        /* not exposed to the user */
 137         ZFS_PROP_DEFER_DESTROY,
 138         ZFS_PROP_USERREFS,
 139         ZFS_PROP_LOGBIAS,
 140         ZFS_PROP_UNIQUE,                /* not exposed to the user */
 141         ZFS_PROP_OBJSETID,              /* not exposed to the user */
 142         ZFS_PROP_DEDUP,
 143         ZFS_PROP_MLSLABEL,
 144         ZFS_PROP_SYNC,
 145         ZFS_PROP_DNODESIZE,
 146         ZFS_PROP_REFRATIO,
 147         ZFS_PROP_WRITTEN,
 148         ZFS_PROP_CLONES,
 149         ZFS_PROP_LOGICALUSED,
 150         ZFS_PROP_LOGICALREFERENCED,
 151         ZFS_PROP_INCONSISTENT,          /* not exposed to the user */
 152         ZFS_PROP_FILESYSTEM_LIMIT,
 153         ZFS_PROP_SNAPSHOT_LIMIT,
 154         ZFS_PROP_FILESYSTEM_COUNT,
 155         ZFS_PROP_SNAPSHOT_COUNT,
 156         ZFS_PROP_SNAPDEV,
 157         ZFS_PROP_ACLTYPE,
 158         ZFS_PROP_SELINUX_CONTEXT,
 159         ZFS_PROP_SELINUX_FSCONTEXT,
 160         ZFS_PROP_SELINUX_DEFCONTEXT,
 161         ZFS_PROP_SELINUX_ROOTCONTEXT,
 162         ZFS_PROP_RELATIME,
 163         ZFS_PROP_REDUNDANT_METADATA,
 164         ZFS_PROP_OVERLAY,
 165         ZFS_PROP_PREV_SNAP,
 166         ZFS_PROP_RECEIVE_RESUME_TOKEN,
 167         ZFS_NUM_PROPS
 168 } zfs_prop_t;
 169
 170 typedef enum {
 171         ZFS_PROP_USERUSED,
 172         ZFS_PROP_USERQUOTA,
 173         ZFS_PROP_GROUPUSED,
 174         ZFS_PROP_GROUPQUOTA,
 175         ZFS_PROP_USEROBJUSED,
 176         ZFS_PROP_USEROBJQUOTA,
 177         ZFS_PROP_GROUPOBJUSED,
 178         ZFS_PROP_GROUPOBJQUOTA,
 179         ZFS_NUM_USERQUOTA_PROPS
 180 } zfs_userquota_prop_t;
 181
 182 extern const char *zfs_userquota_prop_prefixes[ZFS_NUM_USERQUOTA_PROPS];
 183
 184 /*
 185  * Pool properties are identified by these constants and must be added to the
 186  * end of this list to ensure that external consumers are not affected
 187  * by the change. If you make any changes to this list, be sure to update
 188  * the property table in module/zcommon/zpool_prop.c.
 189  */
 190 typedef enum {
 191         ZPOOL_PROP_NAME,
 192         ZPOOL_PROP_SIZE,
 193         ZPOOL_PROP_CAPACITY,
 194         ZPOOL_PROP_ALTROOT,
 195         ZPOOL_PROP_HEALTH,
 196         ZPOOL_PROP_GUID,
 197         ZPOOL_PROP_VERSION,
 198         ZPOOL_PROP_BOOTFS,
 199         ZPOOL_PROP_DELEGATION,
 200         ZPOOL_PROP_AUTOREPLACE,
 201         ZPOOL_PROP_CACHEFILE,
 202         ZPOOL_PROP_FAILUREMODE,
 203         ZPOOL_PROP_LISTSNAPS,
 204         ZPOOL_PROP_AUTOEXPAND,
 205         ZPOOL_PROP_DEDUPDITTO,
 206         ZPOOL_PROP_DEDUPRATIO,
 207         ZPOOL_PROP_FREE,
 208         ZPOOL_PROP_ALLOCATED,
 209         ZPOOL_PROP_READONLY,
 210         ZPOOL_PROP_ASHIFT,
 211         ZPOOL_PROP_COMMENT,
 212         ZPOOL_PROP_EXPANDSZ,
 213         ZPOOL_PROP_FREEING,
 214         ZPOOL_PROP_FRAGMENTATION,
 215         ZPOOL_PROP_LEAKED,
 216         ZPOOL_PROP_MAXBLOCKSIZE,
 217         ZPOOL_PROP_TNAME,
 218         ZPOOL_PROP_MAXDNODESIZE,
 219         ZPOOL_NUM_PROPS
 220 } zpool_prop_t;
 221
 222 /* Small enough to not hog a whole line of printout in zpool(1M). */
 223 #define ZPROP_MAX_COMMENT       32
 224
 225 #define ZPROP_CONT              -2
 226 #define ZPROP_INVAL             -1
 227
 228 #define ZPROP_VALUE             "value"
 229 #define ZPROP_SOURCE            "source"
 230
 231 typedef enum {
 232         ZPROP_SRC_NONE = 0x1,
 233         ZPROP_SRC_DEFAULT = 0x2,
 234         ZPROP_SRC_TEMPORARY = 0x4,
 235         ZPROP_SRC_LOCAL = 0x8,
 236         ZPROP_SRC_INHERITED = 0x10,
 237         ZPROP_SRC_RECEIVED = 0x20
 238 } zprop_source_t;
 239
 240 #define ZPROP_SRC_ALL   0x3f
 241
 242 #define ZPROP_SOURCE_VAL_RECVD  "$recvd"
 243 #define ZPROP_N_MORE_ERRORS     "N_MORE_ERRORS"
 244
 245 /*
 246  * Dataset flag implemented as a special entry in the props zap object
 247  * indicating that the dataset has received properties on or after
 248  * SPA_VERSION_RECVD_PROPS. The first such receive blows away local properties
 249  * just as it did in earlier versions, and thereafter, local properties are
 250  * preserved.
 251  */
 252 #define ZPROP_HAS_RECVD         "$hasrecvd"
 253
 254 typedef enum {
 255         ZPROP_ERR_NOCLEAR = 0x1, /* failure to clear existing props */
 256         ZPROP_ERR_NORESTORE = 0x2 /* failure to restore props on error */
 257 } zprop_errflags_t;
 258
 259 typedef int (*zprop_func)(int, void *);
 260
 261 /*
 262  * Properties to be set on the root file system of a new pool
 263  * are stuffed into their own nvlist, which is then included in
 264  * the properties nvlist with the pool properties.
 265  */
 266 #define ZPOOL_ROOTFS_PROPS      "root-props-nvl"
 267
 268 /*
 269  * Dataset property functions shared between libzfs and kernel.
 270  */
 271 const char *zfs_prop_default_string(zfs_prop_t);
 272 uint64_t zfs_prop_default_numeric(zfs_prop_t);
 273 boolean_t zfs_prop_readonly(zfs_prop_t);
 274 boolean_t zfs_prop_inheritable(zfs_prop_t);
 275 boolean_t zfs_prop_setonce(zfs_prop_t);
 276 const char *zfs_prop_to_name(zfs_prop_t);
 277 zfs_prop_t zfs_name_to_prop(const char *);
 278 boolean_t zfs_prop_user(const char *);
 279 boolean_t zfs_prop_userquota(const char *);
 280 boolean_t zfs_prop_written(const char *);
 281 int zfs_prop_index_to_string(zfs_prop_t, uint64_t, const char **);
 282 int zfs_prop_string_to_index(zfs_prop_t, const char *, uint64_t *);
 283 uint64_t zfs_prop_random_value(zfs_prop_t, uint64_t seed);
 284 boolean_t zfs_prop_valid_for_type(int, zfs_type_t, boolean_t);
 285
 286 /*
 287  * Pool property functions shared between libzfs and kernel.
 288  */
 289 zpool_prop_t zpool_name_to_prop(const char *);
 290 const char *zpool_prop_to_name(zpool_prop_t);
 291 const char *zpool_prop_default_string(zpool_prop_t);
 292 uint64_t zpool_prop_default_numeric(zpool_prop_t);
 293 boolean_t zpool_prop_readonly(zpool_prop_t);
 294 boolean_t zpool_prop_feature(const char *);
 295 boolean_t zpool_prop_unsupported(const char *);
 296 int zpool_prop_index_to_string(zpool_prop_t, uint64_t, const char **);
 297 int zpool_prop_string_to_index(zpool_prop_t, const char *, uint64_t *);
 298 uint64_t zpool_prop_random_value(zpool_prop_t, uint64_t seed);
 299
 300 /*
 301  * Definitions for the Delegation.
 302  */
 303 typedef enum {
 304         ZFS_DELEG_WHO_UNKNOWN = 0,
 305         ZFS_DELEG_USER = 'u',
 306         ZFS_DELEG_USER_SETS = 'U',
 307         ZFS_DELEG_GROUP = 'g',
 308         ZFS_DELEG_GROUP_SETS = 'G',
 309         ZFS_DELEG_EVERYONE = 'e',
 310         ZFS_DELEG_EVERYONE_SETS = 'E',
 311         ZFS_DELEG_CREATE = 'c',
 312         ZFS_DELEG_CREATE_SETS = 'C',
 313         ZFS_DELEG_NAMED_SET = 's',
 314         ZFS_DELEG_NAMED_SET_SETS = 'S'
 315 } zfs_deleg_who_type_t;
 316
 317 typedef enum {
 318         ZFS_DELEG_NONE = 0,
 319         ZFS_DELEG_PERM_LOCAL = 1,
 320         ZFS_DELEG_PERM_DESCENDENT = 2,
 321         ZFS_DELEG_PERM_LOCALDESCENDENT = 3,
 322         ZFS_DELEG_PERM_CREATE = 4
 323 } zfs_deleg_inherit_t;
 324
 325 #define ZFS_DELEG_PERM_UID      "uid"
 326 #define ZFS_DELEG_PERM_GID      "gid"
 327 #define ZFS_DELEG_PERM_GROUPS   "groups"
 328
 329 #define ZFS_MLSLABEL_DEFAULT    "none"
 330
 331 #define ZFS_SMB_ACL_SRC         "src"
 332 #define ZFS_SMB_ACL_TARGET      "target"
 333
 334 typedef enum {
 335         ZFS_CANMOUNT_OFF = 0,
 336         ZFS_CANMOUNT_ON = 1,
 337         ZFS_CANMOUNT_NOAUTO = 2
 338 } zfs_canmount_type_t;
 339
 340 typedef enum {
 341         ZFS_LOGBIAS_LATENCY = 0,
 342         ZFS_LOGBIAS_THROUGHPUT = 1
 343 } zfs_logbias_op_t;
 344
 345 typedef enum zfs_share_op {
 346         ZFS_SHARE_NFS = 0,
 347         ZFS_UNSHARE_NFS = 1,
 348         ZFS_SHARE_SMB = 2,
 349         ZFS_UNSHARE_SMB = 3
 350 } zfs_share_op_t;
 351
 352 typedef enum zfs_smb_acl_op {
 353         ZFS_SMB_ACL_ADD,
 354         ZFS_SMB_ACL_REMOVE,
 355         ZFS_SMB_ACL_RENAME,
 356         ZFS_SMB_ACL_PURGE
 357 } zfs_smb_acl_op_t;
 358
 359 typedef enum zfs_cache_type {
 360         ZFS_CACHE_NONE = 0,
 361         ZFS_CACHE_METADATA = 1,
 362         ZFS_CACHE_ALL = 2
 363 } zfs_cache_type_t;
 364
 365 typedef enum {
 366         ZFS_SYNC_STANDARD = 0,
 367         ZFS_SYNC_ALWAYS = 1,
 368         ZFS_SYNC_DISABLED = 2
 369 } zfs_sync_type_t;
 370
 371 typedef enum {
 372         ZFS_XATTR_OFF = 0,
 373         ZFS_XATTR_DIR = 1,
 374         ZFS_XATTR_SA = 2
 375 } zfs_xattr_type_t;
 376
 377 typedef enum {
 378         ZFS_DNSIZE_LEGACY = 0,
 379         ZFS_DNSIZE_AUTO = 1,
 380         ZFS_DNSIZE_1K = 1024,
 381         ZFS_DNSIZE_2K = 2048,
 382         ZFS_DNSIZE_4K = 4096,
 383         ZFS_DNSIZE_8K = 8192,
 384         ZFS_DNSIZE_16K = 16384
 385 } zfs_dnsize_type_t;
 386
 387 typedef enum {
 388         ZFS_REDUNDANT_METADATA_ALL,
 389         ZFS_REDUNDANT_METADATA_MOST
 390 } zfs_redundant_metadata_type_t;
 391
 392 /*
 393  * On-disk version number.
 394  */
 395 #define SPA_VERSION_1                   1ULL
 396 #define SPA_VERSION_2                   2ULL
 397 #define SPA_VERSION_3                   3ULL
 398 #define SPA_VERSION_4                   4ULL
 399 #define SPA_VERSION_5                   5ULL
 400 #define SPA_VERSION_6                   6ULL
 401 #define SPA_VERSION_7                   7ULL
 402 #define SPA_VERSION_8                   8ULL
 403 #define SPA_VERSION_9                   9ULL
 404 #define SPA_VERSION_10                  10ULL
 405 #define SPA_VERSION_11                  11ULL
 406 #define SPA_VERSION_12                  12ULL
 407 #define SPA_VERSION_13                  13ULL
 408 #define SPA_VERSION_14                  14ULL
 409 #define SPA_VERSION_15                  15ULL
 410 #define SPA_VERSION_16                  16ULL
 411 #define SPA_VERSION_17                  17ULL
 412 #define SPA_VERSION_18                  18ULL
 413 #define SPA_VERSION_19                  19ULL
 414 #define SPA_VERSION_20                  20ULL
 415 #define SPA_VERSION_21                  21ULL
 416 #define SPA_VERSION_22                  22ULL
 417 #define SPA_VERSION_23                  23ULL
 418 #define SPA_VERSION_24                  24ULL
 419 #define SPA_VERSION_25                  25ULL
 420 #define SPA_VERSION_26                  26ULL
 421 #define SPA_VERSION_27                  27ULL
 422 #define SPA_VERSION_28                  28ULL
 423 #define SPA_VERSION_5000                5000ULL
 424
 425 /*
 426  * When bumping up SPA_VERSION, make sure GRUB ZFS understands the on-disk
 427  * format change. Go to usr/src/grub/grub-0.97/stage2/{zfs-include/, fsys_zfs*},
 428  * and do the appropriate changes.  Also bump the version number in
 429  * usr/src/grub/capability.
 430  */
 431 #define SPA_VERSION                     SPA_VERSION_5000
 432 #define SPA_VERSION_STRING              "5000"
 433
 434 /*
 435  * Symbolic names for the changes that caused a SPA_VERSION switch.
 436  * Used in the code when checking for presence or absence of a feature.
 437  * Feel free to define multiple symbolic names for each version if there
 438  * were multiple changes to on-disk structures during that version.
 439  *
 440  * NOTE: When checking the current SPA_VERSION in your code, be sure
 441  *       to use spa_version() since it reports the version of the
 442  *       last synced uberblock.  Checking the in-flight version can
 443  *       be dangerous in some cases.
 444  */
 445 #define SPA_VERSION_INITIAL             SPA_VERSION_1
 446 #define SPA_VERSION_DITTO_BLOCKS        SPA_VERSION_2
 447 #define SPA_VERSION_SPARES              SPA_VERSION_3
 448 #define SPA_VERSION_RAIDZ2              SPA_VERSION_3
 449 #define SPA_VERSION_BPOBJ_ACCOUNT       SPA_VERSION_3
 450 #define SPA_VERSION_RAIDZ_DEFLATE       SPA_VERSION_3
 451 #define SPA_VERSION_DNODE_BYTES         SPA_VERSION_3
 452 #define SPA_VERSION_ZPOOL_HISTORY       SPA_VERSION_4
 453 #define SPA_VERSION_GZIP_COMPRESSION    SPA_VERSION_5
 454 #define SPA_VERSION_BOOTFS              SPA_VERSION_6
 455 #define SPA_VERSION_SLOGS               SPA_VERSION_7
 456 #define SPA_VERSION_DELEGATED_PERMS     SPA_VERSION_8
 457 #define SPA_VERSION_FUID                SPA_VERSION_9
 458 #define SPA_VERSION_REFRESERVATION      SPA_VERSION_9
 459 #define SPA_VERSION_REFQUOTA            SPA_VERSION_9
 460 #define SPA_VERSION_UNIQUE_ACCURATE     SPA_VERSION_9
 461 #define SPA_VERSION_L2CACHE             SPA_VERSION_10
 462 #define SPA_VERSION_NEXT_CLONES         SPA_VERSION_11
 463 #define SPA_VERSION_ORIGIN              SPA_VERSION_11
 464 #define SPA_VERSION_DSL_SCRUB           SPA_VERSION_11
 465 #define SPA_VERSION_SNAP_PROPS          SPA_VERSION_12
 466 #define SPA_VERSION_USED_BREAKDOWN      SPA_VERSION_13
 467 #define SPA_VERSION_PASSTHROUGH_X       SPA_VERSION_14
 468 #define SPA_VERSION_USERSPACE           SPA_VERSION_15
 469 #define SPA_VERSION_STMF_PROP           SPA_VERSION_16
 470 #define SPA_VERSION_RAIDZ3              SPA_VERSION_17
 471 #define SPA_VERSION_USERREFS            SPA_VERSION_18
 472 #define SPA_VERSION_HOLES               SPA_VERSION_19
 473 #define SPA_VERSION_ZLE_COMPRESSION     SPA_VERSION_20
 474 #define SPA_VERSION_DEDUP               SPA_VERSION_21
 475 #define SPA_VERSION_RECVD_PROPS         SPA_VERSION_22
 476 #define SPA_VERSION_SLIM_ZIL            SPA_VERSION_23
 477 #define SPA_VERSION_SA                  SPA_VERSION_24
 478 #define SPA_VERSION_SCAN                SPA_VERSION_25
 479 #define SPA_VERSION_DIR_CLONES          SPA_VERSION_26
 480 #define SPA_VERSION_DEADLISTS           SPA_VERSION_26
 481 #define SPA_VERSION_FAST_SNAP           SPA_VERSION_27
 482 #define SPA_VERSION_MULTI_REPLACE       SPA_VERSION_28
 483 #define SPA_VERSION_BEFORE_FEATURES     SPA_VERSION_28
 484 #define SPA_VERSION_FEATURES            SPA_VERSION_5000
 485
 486 #define SPA_VERSION_IS_SUPPORTED(v) \
 487         (((v) >= SPA_VERSION_INITIAL && (v) <= SPA_VERSION_BEFORE_FEATURES) || \
 488         ((v) >= SPA_VERSION_FEATURES && (v) <= SPA_VERSION))
 489
 490 /*
 491  * ZPL version - rev'd whenever an incompatible on-disk format change
 492  * occurs.  This is independent of SPA/DMU/ZAP versioning.  You must
 493  * also update the version_table[] and help message in zfs_prop.c.
 494  *
 495  * When changing, be sure to teach GRUB how to read the new format!
 496  * See usr/src/grub/grub-0.97/stage2/{zfs-include/,fsys_zfs*}
 497  */
 498 #define ZPL_VERSION_1                   1ULL
 499 #define ZPL_VERSION_2                   2ULL
 500 #define ZPL_VERSION_3                   3ULL
 501 #define ZPL_VERSION_4                   4ULL
 502 #define ZPL_VERSION_5                   5ULL
 503 #define ZPL_VERSION                     ZPL_VERSION_5
 504 #define ZPL_VERSION_STRING              "5"
 505
 506 #define ZPL_VERSION_INITIAL             ZPL_VERSION_1
 507 #define ZPL_VERSION_DIRENT_TYPE         ZPL_VERSION_2
 508 #define ZPL_VERSION_FUID                ZPL_VERSION_3
 509 #define ZPL_VERSION_NORMALIZATION       ZPL_VERSION_3
 510 #define ZPL_VERSION_SYSATTR             ZPL_VERSION_3
 511 #define ZPL_VERSION_USERSPACE           ZPL_VERSION_4
 512 #define ZPL_VERSION_SA                  ZPL_VERSION_5
 513
 514 /* Rewind request information */
 515 #define ZPOOL_NO_REWIND         1  /* No policy - default behavior */
 516 #define ZPOOL_NEVER_REWIND      2  /* Do not search for best txg or rewind */
 517 #define ZPOOL_TRY_REWIND        4  /* Search for best txg, but do not rewind */
 518 #define ZPOOL_DO_REWIND         8  /* Rewind to best txg w/in deferred frees */
 519 #define ZPOOL_EXTREME_REWIND    16 /* Allow extreme measures to find best txg */
 520 #define ZPOOL_REWIND_MASK       28 /* All the possible rewind bits */
 521 #define ZPOOL_REWIND_POLICIES   31 /* All the possible policy bits */
 522
 523 typedef struct zpool_rewind_policy {
 524         uint32_t        zrp_request;    /* rewind behavior requested */
 525         uint64_t        zrp_maxmeta;    /* max acceptable meta-data errors */
 526         uint64_t        zrp_maxdata;    /* max acceptable data errors */
 527         uint64_t        zrp_txg;        /* specific txg to load */
 528 } zpool_rewind_policy_t;
 529
 530 /*
 531  * The following are configuration names used in the nvlist describing a pool's
 532  * configuration.
 533  */
 534 #define ZPOOL_CONFIG_VERSION            "version"
 535 #define ZPOOL_CONFIG_POOL_NAME          "name"
 536 #define ZPOOL_CONFIG_POOL_STATE         "state"
 537 #define ZPOOL_CONFIG_POOL_TXG           "txg"
 538 #define ZPOOL_CONFIG_POOL_GUID          "pool_guid"
 539 #define ZPOOL_CONFIG_CREATE_TXG         "create_txg"
 540 #define ZPOOL_CONFIG_TOP_GUID           "top_guid"
 541 #define ZPOOL_CONFIG_VDEV_TREE          "vdev_tree"
 542 #define ZPOOL_CONFIG_TYPE               "type"
 543 #define ZPOOL_CONFIG_CHILDREN           "children"
 544 #define ZPOOL_CONFIG_ID                 "id"
 545 #define ZPOOL_CONFIG_GUID               "guid"
 546 #define ZPOOL_CONFIG_PATH               "path"
 547 #define ZPOOL_CONFIG_DEVID              "devid"
 548 #define ZPOOL_CONFIG_METASLAB_ARRAY     "metaslab_array"
 549 #define ZPOOL_CONFIG_METASLAB_SHIFT     "metaslab_shift"
 550 #define ZPOOL_CONFIG_ASHIFT             "ashift"
 551 #define ZPOOL_CONFIG_ASIZE              "asize"
 552 #define ZPOOL_CONFIG_DTL                "DTL"
 553 #define ZPOOL_CONFIG_SCAN_STATS         "scan_stats"    /* not stored on disk */
 554 #define ZPOOL_CONFIG_VDEV_STATS         "vdev_stats"    /* not stored on disk */
 555
 556 /* container nvlist of extended stats */
 557 #define ZPOOL_CONFIG_VDEV_STATS_EX      "vdev_stats_ex"
 558
 559 /* Active queue read/write stats */
 560 #define ZPOOL_CONFIG_VDEV_SYNC_R_ACTIVE_QUEUE   "vdev_sync_r_active_queue"
 561 #define ZPOOL_CONFIG_VDEV_SYNC_W_ACTIVE_QUEUE   "vdev_sync_w_active_queue"
 562 #define ZPOOL_CONFIG_VDEV_ASYNC_R_ACTIVE_QUEUE  "vdev_async_r_active_queue"
 563 #define ZPOOL_CONFIG_VDEV_ASYNC_W_ACTIVE_QUEUE  "vdev_async_w_active_queue"
 564 #define ZPOOL_CONFIG_VDEV_SCRUB_ACTIVE_QUEUE    "vdev_async_scrub_active_queue"
 565
 566 /* Queue sizes */
 567 #define ZPOOL_CONFIG_VDEV_SYNC_R_PEND_QUEUE     "vdev_sync_r_pend_queue"
 568 #define ZPOOL_CONFIG_VDEV_SYNC_W_PEND_QUEUE     "vdev_sync_w_pend_queue"
 569 #define ZPOOL_CONFIG_VDEV_ASYNC_R_PEND_QUEUE    "vdev_async_r_pend_queue"
 570 #define ZPOOL_CONFIG_VDEV_ASYNC_W_PEND_QUEUE    "vdev_async_w_pend_queue"
 571 #define ZPOOL_CONFIG_VDEV_SCRUB_PEND_QUEUE      "vdev_async_scrub_pend_queue"
 572
 573 /* Latency read/write histogram stats */
 574 #define ZPOOL_CONFIG_VDEV_TOT_R_LAT_HISTO       "vdev_tot_r_lat_histo"
 575 #define ZPOOL_CONFIG_VDEV_TOT_W_LAT_HISTO       "vdev_tot_w_lat_histo"
 576 #define ZPOOL_CONFIG_VDEV_DISK_R_LAT_HISTO      "vdev_disk_r_lat_histo"
 577 #define ZPOOL_CONFIG_VDEV_DISK_W_LAT_HISTO      "vdev_disk_w_lat_histo"
 578 #define ZPOOL_CONFIG_VDEV_SYNC_R_LAT_HISTO      "vdev_sync_r_lat_histo"
 579 #define ZPOOL_CONFIG_VDEV_SYNC_W_LAT_HISTO      "vdev_sync_w_lat_histo"
 580 #define ZPOOL_CONFIG_VDEV_ASYNC_R_LAT_HISTO     "vdev_async_r_lat_histo"
 581 #define ZPOOL_CONFIG_VDEV_ASYNC_W_LAT_HISTO     "vdev_async_w_lat_histo"
 582 #define ZPOOL_CONFIG_VDEV_SCRUB_LAT_HISTO       "vdev_scrub_histo"
 583
 584 /* Request size histograms */
 585 #define ZPOOL_CONFIG_VDEV_SYNC_IND_R_HISTO      "vdev_sync_ind_r_histo"
 586 #define ZPOOL_CONFIG_VDEV_SYNC_IND_W_HISTO      "vdev_sync_ind_w_histo"
 587 #define ZPOOL_CONFIG_VDEV_ASYNC_IND_R_HISTO     "vdev_async_ind_r_histo"
 588 #define ZPOOL_CONFIG_VDEV_ASYNC_IND_W_HISTO     "vdev_async_ind_w_histo"
 589 #define ZPOOL_CONFIG_VDEV_IND_SCRUB_HISTO       "vdev_ind_scrub_histo"
 590 #define ZPOOL_CONFIG_VDEV_SYNC_AGG_R_HISTO      "vdev_sync_agg_r_histo"
 591 #define ZPOOL_CONFIG_VDEV_SYNC_AGG_W_HISTO      "vdev_sync_agg_w_histo"
 592 #define ZPOOL_CONFIG_VDEV_ASYNC_AGG_R_HISTO     "vdev_async_agg_r_histo"
 593 #define ZPOOL_CONFIG_VDEV_ASYNC_AGG_W_HISTO     "vdev_async_agg_w_histo"
 594 #define ZPOOL_CONFIG_VDEV_AGG_SCRUB_HISTO       "vdev_agg_scrub_histo"
 595
 596 /* vdev enclosure sysfs path */
 597 #define ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH        "vdev_enc_sysfs_path"
 598
 599 #define ZPOOL_CONFIG_WHOLE_DISK         "whole_disk"
 600 #define ZPOOL_CONFIG_ERRCOUNT           "error_count"
 601 #define ZPOOL_CONFIG_NOT_PRESENT        "not_present"
 602 #define ZPOOL_CONFIG_SPARES             "spares"
 603 #define ZPOOL_CONFIG_IS_SPARE           "is_spare"
 604 #define ZPOOL_CONFIG_NPARITY            "nparity"
 605 #define ZPOOL_CONFIG_HOSTID             "hostid"
 606 #define ZPOOL_CONFIG_HOSTNAME           "hostname"
 607 #define ZPOOL_CONFIG_LOADED_TIME        "initial_load_time"
 608 #define ZPOOL_CONFIG_UNSPARE            "unspare"
 609 #define ZPOOL_CONFIG_PHYS_PATH          "phys_path"
 610 #define ZPOOL_CONFIG_IS_LOG             "is_log"
 611 #define ZPOOL_CONFIG_L2CACHE            "l2cache"
 612 #define ZPOOL_CONFIG_HOLE_ARRAY         "hole_array"
 613 #define ZPOOL_CONFIG_VDEV_CHILDREN      "vdev_children"
 614 #define ZPOOL_CONFIG_IS_HOLE            "is_hole"
 615 #define ZPOOL_CONFIG_DDT_HISTOGRAM      "ddt_histogram"
 616 #define ZPOOL_CONFIG_DDT_OBJ_STATS      "ddt_object_stats"
 617 #define ZPOOL_CONFIG_DDT_STATS          "ddt_stats"
 618 #define ZPOOL_CONFIG_SPLIT              "splitcfg"
 619 #define ZPOOL_CONFIG_ORIG_GUID          "orig_guid"
 620 #define ZPOOL_CONFIG_SPLIT_GUID         "split_guid"
 621 #define ZPOOL_CONFIG_SPLIT_LIST         "guid_list"
 622 #define ZPOOL_CONFIG_REMOVING           "removing"
 623 #define ZPOOL_CONFIG_RESILVER_TXG       "resilver_txg"
 624 #define ZPOOL_CONFIG_COMMENT            "comment"
 625 #define ZPOOL_CONFIG_SUSPENDED          "suspended"     /* not stored on disk */
 626 #define ZPOOL_CONFIG_TIMESTAMP          "timestamp"     /* not stored on disk */
 627 #define ZPOOL_CONFIG_BOOTFS             "bootfs"        /* not stored on disk */
 628 #define ZPOOL_CONFIG_MISSING_DEVICES    "missing_vdevs" /* not stored on disk */
 629 #define ZPOOL_CONFIG_LOAD_INFO          "load_info"     /* not stored on disk */
 630 #define ZPOOL_CONFIG_REWIND_INFO        "rewind_info"   /* not stored on disk */
 631 #define ZPOOL_CONFIG_UNSUP_FEAT         "unsup_feat"    /* not stored on disk */
 632 #define ZPOOL_CONFIG_ENABLED_FEAT       "enabled_feat"  /* not stored on disk */
 633 #define ZPOOL_CONFIG_CAN_RDONLY         "can_rdonly"    /* not stored on disk */
 634 #define ZPOOL_CONFIG_FEATURES_FOR_READ  "features_for_read"
 635 #define ZPOOL_CONFIG_FEATURE_STATS      "feature_stats" /* not stored on disk */
 636 #define ZPOOL_CONFIG_ERRATA             "errata"        /* not stored on disk */
 637 #define ZPOOL_CONFIG_VDEV_TOP_ZAP       "com.delphix:vdev_zap_top"
 638 #define ZPOOL_CONFIG_VDEV_LEAF_ZAP      "com.delphix:vdev_zap_leaf"
 639 #define ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS  "com.delphix:has_per_vdev_zaps"
 640 /*
 641  * The persistent vdev state is stored as separate values rather than a single
 642  * 'vdev_state' entry.  This is because a device can be in multiple states, such
 643  * as offline and degraded.
 644  */
 645 #define ZPOOL_CONFIG_OFFLINE            "offline"
 646 #define ZPOOL_CONFIG_FAULTED            "faulted"
 647 #define ZPOOL_CONFIG_DEGRADED           "degraded"
 648 #define ZPOOL_CONFIG_REMOVED            "removed"
 649 #define ZPOOL_CONFIG_FRU                "fru"
 650 #define ZPOOL_CONFIG_AUX_STATE          "aux_state"
 651
 652 /* Rewind policy parameters */
 653 #define ZPOOL_REWIND_POLICY             "rewind-policy"
 654 #define ZPOOL_REWIND_REQUEST            "rewind-request"
 655 #define ZPOOL_REWIND_REQUEST_TXG        "rewind-request-txg"
 656 #define ZPOOL_REWIND_META_THRESH        "rewind-meta-thresh"
 657 #define ZPOOL_REWIND_DATA_THRESH        "rewind-data-thresh"
 658
 659 /* Rewind data discovered */
 660 #define ZPOOL_CONFIG_LOAD_TIME          "rewind_txg_ts"
 661 #define ZPOOL_CONFIG_LOAD_DATA_ERRORS   "verify_data_errors"
 662 #define ZPOOL_CONFIG_REWIND_TIME        "seconds_of_rewind"
 663
 664 #define VDEV_TYPE_ROOT                  "root"
 665 #define VDEV_TYPE_MIRROR                "mirror"
 666 #define VDEV_TYPE_REPLACING             "replacing"
 667 #define VDEV_TYPE_RAIDZ                 "raidz"
 668 #define VDEV_TYPE_DISK                  "disk"
 669 #define VDEV_TYPE_FILE                  "file"
 670 #define VDEV_TYPE_MISSING               "missing"
 671 #define VDEV_TYPE_HOLE                  "hole"
 672 #define VDEV_TYPE_SPARE                 "spare"
 673 #define VDEV_TYPE_LOG                   "log"
 674 #define VDEV_TYPE_L2CACHE               "l2cache"
 675
 676 /*
 677  * This is needed in userland to report the minimum necessary device size.
 678  */
 679 #define SPA_MINDEVSIZE          (64ULL << 20)
 680
 681 /*
 682  * Set if the fragmentation has not yet been calculated. This can happen
 683  * because the space maps have not been upgraded or the histogram feature
 684  * is not enabled.
 685  */
 686 #define ZFS_FRAG_INVALID        UINT64_MAX
 687
 688 /*
 689  * The location of the pool configuration repository, shared between kernel and
 690  * userland.
 691  */
 692 #define ZPOOL_CACHE             "/etc/zfs/zpool.cache"
 693
 694 /*
 695  * vdev states are ordered from least to most healthy.
 696  * A vdev that's CANT_OPEN or below is considered unusable.
 697  */
 698 typedef enum vdev_state {
 699         VDEV_STATE_UNKNOWN = 0, /* Uninitialized vdev                   */
 700         VDEV_STATE_CLOSED,      /* Not currently open                   */
 701         VDEV_STATE_OFFLINE,     /* Not allowed to open                  */
 702         VDEV_STATE_REMOVED,     /* Explicitly removed from system       */
 703         VDEV_STATE_CANT_OPEN,   /* Tried to open, but failed            */
 704         VDEV_STATE_FAULTED,     /* External request to fault device     */
 705         VDEV_STATE_DEGRADED,    /* Replicated vdev with unhealthy kids  */
 706         VDEV_STATE_HEALTHY      /* Presumed good                        */
 707 } vdev_state_t;
 708
 709 #define VDEV_STATE_ONLINE       VDEV_STATE_HEALTHY
 710
 711 /*
 712  * vdev aux states.  When a vdev is in the CANT_OPEN state, the aux field
 713  * of the vdev stats structure uses these constants to distinguish why.
 714  */
 715 typedef enum vdev_aux {
 716         VDEV_AUX_NONE,          /* no error                             */
 717         VDEV_AUX_OPEN_FAILED,   /* ldi_open_*() or vn_open() failed     */
 718         VDEV_AUX_CORRUPT_DATA,  /* bad label or disk contents           */
 719         VDEV_AUX_NO_REPLICAS,   /* insufficient number of replicas      */
 720         VDEV_AUX_BAD_GUID_SUM,  /* vdev guid sum doesn't match          */
 721         VDEV_AUX_TOO_SMALL,     /* vdev size is too small               */
 722         VDEV_AUX_BAD_LABEL,     /* the label is OK but invalid          */
 723         VDEV_AUX_VERSION_NEWER, /* on-disk version is too new           */
 724         VDEV_AUX_VERSION_OLDER, /* on-disk version is too old           */
 725         VDEV_AUX_UNSUP_FEAT,    /* unsupported features                 */
 726         VDEV_AUX_SPARED,        /* hot spare used in another pool       */
 727         VDEV_AUX_ERR_EXCEEDED,  /* too many errors                      */
 728         VDEV_AUX_IO_FAILURE,    /* experienced I/O failure              */
 729         VDEV_AUX_BAD_LOG,       /* cannot read log chain(s)             */
 730         VDEV_AUX_EXTERNAL,      /* external diagnosis                   */
 731         VDEV_AUX_SPLIT_POOL     /* vdev was split off into another pool */
 732 } vdev_aux_t;
 733
 734 /*
 735  * pool state.  The following states are written to disk as part of the normal
 736  * SPA lifecycle: ACTIVE, EXPORTED, DESTROYED, SPARE, L2CACHE.  The remaining
 737  * states are software abstractions used at various levels to communicate
 738  * pool state.
 739  */
 740 typedef enum pool_state {
 741         POOL_STATE_ACTIVE = 0,          /* In active use                */
 742         POOL_STATE_EXPORTED,            /* Explicitly exported          */
 743         POOL_STATE_DESTROYED,           /* Explicitly destroyed         */
 744         POOL_STATE_SPARE,               /* Reserved for hot spare use   */
 745         POOL_STATE_L2CACHE,             /* Level 2 ARC device           */
 746         POOL_STATE_UNINITIALIZED,       /* Internal spa_t state         */
 747         POOL_STATE_UNAVAIL,             /* Internal libzfs state        */
 748         POOL_STATE_POTENTIALLY_ACTIVE   /* Internal libzfs state        */
 749 } pool_state_t;
 750
 751 /*
 752  * Scan Functions.
 753  */
 754 typedef enum pool_scan_func {
 755         POOL_SCAN_NONE,
 756         POOL_SCAN_SCRUB,
 757         POOL_SCAN_RESILVER,
 758         POOL_SCAN_FUNCS
 759 } pool_scan_func_t;
 760
 761 /*
 762  * ZIO types.  Needed to interpret vdev statistics below.
 763  */
 764 typedef enum zio_type {
 765         ZIO_TYPE_NULL = 0,
 766         ZIO_TYPE_READ,
 767         ZIO_TYPE_WRITE,
 768         ZIO_TYPE_FREE,
 769         ZIO_TYPE_CLAIM,
 770         ZIO_TYPE_IOCTL,
 771         ZIO_TYPES
 772 } zio_type_t;
 773
 774 /*
 775  * Pool statistics.  Note: all fields should be 64-bit because this
 776  * is passed between kernel and userland as an nvlist uint64 array.
 777  */
 778 typedef struct pool_scan_stat {
 779         /* values stored on disk */
 780         uint64_t        pss_func;       /* pool_scan_func_t */
 781         uint64_t        pss_state;      /* dsl_scan_state_t */
 782         uint64_t        pss_start_time; /* scan start time */
 783         uint64_t        pss_end_time;   /* scan end time */
 784         uint64_t        pss_to_examine; /* total bytes to scan */
 785         uint64_t        pss_examined;   /* total examined bytes */
 786         uint64_t        pss_to_process; /* total bytes to process */
 787         uint64_t        pss_processed;  /* total processed bytes */
 788         uint64_t        pss_errors;     /* scan errors  */
 789
 790         /* values not stored on disk */
 791         uint64_t        pss_pass_exam;  /* examined bytes per scan pass */
 792         uint64_t        pss_pass_start; /* start time of a scan pass */
 793 } pool_scan_stat_t;
 794
 795 typedef enum dsl_scan_state {
 796         DSS_NONE,
 797         DSS_SCANNING,
 798         DSS_FINISHED,
 799         DSS_CANCELED,
 800         DSS_NUM_STATES
 801 } dsl_scan_state_t;
 802
 803 /*
 804  * Errata described by http://zfsonlinux.org/msg/ZFS-8000-ER.  The ordering
 805  * of this enum must be maintained to ensure the errata identifiers map to
 806  * the correct documentation.  New errata may only be appended to the list
 807  * and must contain corresponding documentation at the above link.
 808  */
 809 typedef enum zpool_errata {
 810         ZPOOL_ERRATA_NONE,
 811         ZPOOL_ERRATA_ZOL_2094_SCRUB,
 812         ZPOOL_ERRATA_ZOL_2094_ASYNC_DESTROY,
 813 } zpool_errata_t;
 814
 815 /*
 816  * Vdev statistics.  Note: all fields should be 64-bit because this
 817  * is passed between kernel and userland as an nvlist uint64 array.
 818  */
 819 typedef struct vdev_stat {
 820         hrtime_t        vs_timestamp;           /* time since vdev load */
 821         uint64_t        vs_state;               /* vdev state           */
 822         uint64_t        vs_aux;                 /* see vdev_aux_t       */
 823         uint64_t        vs_alloc;               /* space allocated      */
 824         uint64_t        vs_space;               /* total capacity       */
 825         uint64_t        vs_dspace;              /* deflated capacity    */
 826         uint64_t        vs_rsize;               /* replaceable dev size */
 827         uint64_t        vs_esize;               /* expandable dev size */
 828         uint64_t        vs_ops[ZIO_TYPES];      /* operation count      */
 829         uint64_t        vs_bytes[ZIO_TYPES];    /* bytes read/written   */
 830         uint64_t        vs_read_errors;         /* read errors          */
 831         uint64_t        vs_write_errors;        /* write errors         */
 832         uint64_t        vs_checksum_errors;     /* checksum errors      */
 833         uint64_t        vs_self_healed;         /* self-healed bytes    */
 834         uint64_t        vs_scan_removing;       /* removing?    */
 835         uint64_t        vs_scan_processed;      /* scan processed bytes */
 836         uint64_t        vs_fragmentation;       /* device fragmentation */
 837
 838 } vdev_stat_t;
 839
 840 /*
 841  * Extended stats
 842  *
 843  * These are stats which aren't included in the original iostat output.  For
 844  * convenience, they are grouped together in vdev_stat_ex, although each stat
 845  * is individually exported as an nvlist.
 846  */
 847 typedef struct vdev_stat_ex {
 848         /* Number of ZIOs issued to disk and waiting to finish */
 849         uint64_t vsx_active_queue[ZIO_PRIORITY_NUM_QUEUEABLE];
 850
 851         /* Number of ZIOs pending to be issued to disk */
 852         uint64_t vsx_pend_queue[ZIO_PRIORITY_NUM_QUEUEABLE];
 853
 854         /*
 855          * Below are the histograms for various latencies. Buckets are in
 856          * units of nanoseconds.
 857          */
 858
 859         /*
 860          * 2^37 nanoseconds = 134s. Timeouts will probably start kicking in
 861          * before this.
 862          */
 863 #define VDEV_L_HISTO_BUCKETS 37         /* Latency histo buckets */
 864 #define VDEV_RQ_HISTO_BUCKETS 25        /* Request size histo buckets */
 865
 866
 867         /* Amount of time in ZIO queue (ns) */
 868         uint64_t vsx_queue_histo[ZIO_PRIORITY_NUM_QUEUEABLE]
 869             [VDEV_L_HISTO_BUCKETS];
 870
 871         /* Total ZIO latency (ns).  Includes queuing and disk access time */
 872         uint64_t vsx_total_histo[ZIO_TYPES][VDEV_L_HISTO_BUCKETS];
 873
 874         /* Amount of time to read/write the disk (ns) */
 875         uint64_t vsx_disk_histo[ZIO_TYPES][VDEV_L_HISTO_BUCKETS];
 876
 877         /* "lookup the bucket for a value" histogram macros */
 878 #define HISTO(val, buckets) (val != 0 ? MIN(highbit64(val) - 1, \
 879             buckets - 1) : 0)
 880 #define L_HISTO(a) HISTO(a, VDEV_L_HISTO_BUCKETS)
 881 #define RQ_HISTO(a) HISTO(a, VDEV_RQ_HISTO_BUCKETS)
 882
 883         /* Physical IO histogram */
 884         uint64_t vsx_ind_histo[ZIO_PRIORITY_NUM_QUEUEABLE]
 885             [VDEV_RQ_HISTO_BUCKETS];
 886
 887         /* Delegated (aggregated) physical IO histogram */
 888         uint64_t vsx_agg_histo[ZIO_PRIORITY_NUM_QUEUEABLE]
 889             [VDEV_RQ_HISTO_BUCKETS];
 890
 891 } vdev_stat_ex_t;
 892
 893 /*
 894  * DDT statistics.  Note: all fields should be 64-bit because this
 895  * is passed between kernel and userland as an nvlist uint64 array.
 896  */
 897 typedef struct ddt_object {
 898         uint64_t        ddo_count;      /* number of elements in ddt    */
 899         uint64_t        ddo_dspace;     /* size of ddt on disk          */
 900         uint64_t        ddo_mspace;     /* size of ddt in-core          */
 901 } ddt_object_t;
 902
 903 typedef struct ddt_stat {
 904         uint64_t        dds_blocks;     /* blocks                       */
 905         uint64_t        dds_lsize;      /* logical size                 */
 906         uint64_t        dds_psize;      /* physical size                */
 907         uint64_t        dds_dsize;      /* deflated allocated size      */
 908         uint64_t        dds_ref_blocks; /* referenced blocks            */
 909         uint64_t        dds_ref_lsize;  /* referenced lsize * refcnt    */
 910         uint64_t        dds_ref_psize;  /* referenced psize * refcnt    */
 911         uint64_t        dds_ref_dsize;  /* referenced dsize * refcnt    */
 912 } ddt_stat_t;
 913
 914 typedef struct ddt_histogram {
 915         ddt_stat_t      ddh_stat[64];   /* power-of-two histogram buckets */
 916 } ddt_histogram_t;
 917
 918 #define ZVOL_DRIVER     "zvol"
 919 #define ZFS_DRIVER      "zfs"
 920 #define ZFS_DEV         "/dev/zfs"
 921 #define ZFS_SHARETAB    "/etc/dfs/sharetab"
 922
 923 /* general zvol path */
 924 #define ZVOL_DIR        "/dev"
 925
 926 #define ZVOL_MAJOR              230
 927 #define ZVOL_MINOR_BITS         4
 928 #define ZVOL_MINOR_MASK         ((1U << ZVOL_MINOR_BITS) - 1)
 929 #define ZVOL_MINORS             (1 << 4)
 930 #define ZVOL_DEV_NAME           "zd"
 931
 932 #define ZVOL_PROP_NAME          "name"
 933 #define ZVOL_DEFAULT_BLOCKSIZE  8192
 934
 935 /*
 936  * /dev/zfs ioctl numbers.
 937  */
 938 typedef enum zfs_ioc {
 939         /*
 940          * Illumos - 71/128 numbers reserved.
 941          */
 942         ZFS_IOC_FIRST = ('Z' << 8),
 943         ZFS_IOC = ZFS_IOC_FIRST,
 944         ZFS_IOC_POOL_CREATE = ZFS_IOC_FIRST,
 945         ZFS_IOC_POOL_DESTROY,
 946         ZFS_IOC_POOL_IMPORT,
 947         ZFS_IOC_POOL_EXPORT,
 948         ZFS_IOC_POOL_CONFIGS,
 949         ZFS_IOC_POOL_STATS,
 950         ZFS_IOC_POOL_TRYIMPORT,
 951         ZFS_IOC_POOL_SCAN,
 952         ZFS_IOC_POOL_FREEZE,
 953         ZFS_IOC_POOL_UPGRADE,
 954         ZFS_IOC_POOL_GET_HISTORY,
 955         ZFS_IOC_VDEV_ADD,
 956         ZFS_IOC_VDEV_REMOVE,
 957         ZFS_IOC_VDEV_SET_STATE,
 958         ZFS_IOC_VDEV_ATTACH,
 959         ZFS_IOC_VDEV_DETACH,
 960         ZFS_IOC_VDEV_SETPATH,
 961         ZFS_IOC_VDEV_SETFRU,
 962         ZFS_IOC_OBJSET_STATS,
 963         ZFS_IOC_OBJSET_ZPLPROPS,
 964         ZFS_IOC_DATASET_LIST_NEXT,
 965         ZFS_IOC_SNAPSHOT_LIST_NEXT,
 966         ZFS_IOC_SET_PROP,
 967         ZFS_IOC_CREATE,
 968         ZFS_IOC_DESTROY,
 969         ZFS_IOC_ROLLBACK,
 970         ZFS_IOC_RENAME,
 971         ZFS_IOC_RECV,
 972         ZFS_IOC_SEND,
 973         ZFS_IOC_INJECT_FAULT,
 974         ZFS_IOC_CLEAR_FAULT,
 975         ZFS_IOC_INJECT_LIST_NEXT,
 976         ZFS_IOC_ERROR_LOG,
 977         ZFS_IOC_CLEAR,
 978         ZFS_IOC_PROMOTE,
 979         ZFS_IOC_SNAPSHOT,
 980         ZFS_IOC_DSOBJ_TO_DSNAME,
 981         ZFS_IOC_OBJ_TO_PATH,
 982         ZFS_IOC_POOL_SET_PROPS,
 983         ZFS_IOC_POOL_GET_PROPS,
 984         ZFS_IOC_SET_FSACL,
 985         ZFS_IOC_GET_FSACL,
 986         ZFS_IOC_SHARE,
 987         ZFS_IOC_INHERIT_PROP,
 988         ZFS_IOC_SMB_ACL,
 989         ZFS_IOC_USERSPACE_ONE,
 990         ZFS_IOC_USERSPACE_MANY,
 991         ZFS_IOC_USERSPACE_UPGRADE,
 992         ZFS_IOC_HOLD,
 993         ZFS_IOC_RELEASE,
 994         ZFS_IOC_GET_HOLDS,
 995         ZFS_IOC_OBJSET_RECVD_PROPS,
 996         ZFS_IOC_VDEV_SPLIT,
 997         ZFS_IOC_NEXT_OBJ,
 998         ZFS_IOC_DIFF,
 999         ZFS_IOC_TMP_SNAPSHOT,
1000         ZFS_IOC_OBJ_TO_STATS,
1001         ZFS_IOC_SPACE_WRITTEN,
1002         ZFS_IOC_SPACE_SNAPS,
1003         ZFS_IOC_DESTROY_SNAPS,
1004         ZFS_IOC_POOL_REGUID,
1005         ZFS_IOC_POOL_REOPEN,
1006         ZFS_IOC_SEND_PROGRESS,
1007         ZFS_IOC_LOG_HISTORY,
1008         ZFS_IOC_SEND_NEW,
1009         ZFS_IOC_SEND_SPACE,
1010         ZFS_IOC_CLONE,
1011         ZFS_IOC_BOOKMARK,
1012         ZFS_IOC_GET_BOOKMARKS,
1013         ZFS_IOC_DESTROY_BOOKMARKS,
1014         ZFS_IOC_RECV_NEW,
1015
1016         /*
1017          * Linux - 3/64 numbers reserved.
1018          */
1019         ZFS_IOC_LINUX = ('Z' << 8) + 0x80,
1020         ZFS_IOC_EVENTS_NEXT,
1021         ZFS_IOC_EVENTS_CLEAR,
1022         ZFS_IOC_EVENTS_SEEK,
1023
1024         /*
1025          * FreeBSD - 1/64 numbers reserved.
1026          */
1027         ZFS_IOC_FREEBSD = ('Z' << 8) + 0xC0,
1028
1029         ZFS_IOC_LAST
1030 } zfs_ioc_t;
1031
1032 /*
1033  * zvol ioctl to get dataset name
1034  */
1035 #define BLKZNAME                _IOR(0x12, 125, char[ZFS_MAX_DATASET_NAME_LEN])
1036
1037 /*
1038  * Internal SPA load state.  Used by FMA diagnosis engine.
1039  */
1040 typedef enum {
1041         SPA_LOAD_NONE,          /* no load in progress  */
1042         SPA_LOAD_OPEN,          /* normal open          */
1043         SPA_LOAD_IMPORT,        /* import in progress   */
1044         SPA_LOAD_TRYIMPORT,     /* tryimport in progress */
1045         SPA_LOAD_RECOVER,       /* recovery requested   */
1046         SPA_LOAD_ERROR,         /* load failed          */
1047         SPA_LOAD_CREATE         /* creation in progress */
1048 } spa_load_state_t;
1049
1050 /*
1051  * Bookmark name values.
1052  */
1053 #define ZPOOL_ERR_LIST          "error list"
1054 #define ZPOOL_ERR_DATASET       "dataset"
1055 #define ZPOOL_ERR_OBJECT        "object"
1056
1057 #define HIS_MAX_RECORD_LEN      (MAXPATHLEN + MAXPATHLEN + 1)
1058
1059 /*
1060  * The following are names used in the nvlist describing
1061  * the pool's history log.
1062  */
1063 #define ZPOOL_HIST_RECORD       "history record"
1064 #define ZPOOL_HIST_TIME         "history time"
1065 #define ZPOOL_HIST_CMD          "history command"
1066 #define ZPOOL_HIST_WHO          "history who"
1067 #define ZPOOL_HIST_ZONE         "history zone"
1068 #define ZPOOL_HIST_HOST         "history hostname"
1069 #define ZPOOL_HIST_TXG          "history txg"
1070 #define ZPOOL_HIST_INT_EVENT    "history internal event"
1071 #define ZPOOL_HIST_INT_STR      "history internal str"
1072 #define ZPOOL_HIST_INT_NAME     "internal_name"
1073 #define ZPOOL_HIST_IOCTL        "ioctl"
1074 #define ZPOOL_HIST_INPUT_NVL    "in_nvl"
1075 #define ZPOOL_HIST_OUTPUT_NVL   "out_nvl"
1076 #define ZPOOL_HIST_DSNAME       "dsname"
1077 #define ZPOOL_HIST_DSID         "dsid"
1078
1079 /*
1080  * Flags for ZFS_IOC_VDEV_SET_STATE
1081  */
1082 #define ZFS_ONLINE_CHECKREMOVE  0x1
1083 #define ZFS_ONLINE_UNSPARE      0x2
1084 #define ZFS_ONLINE_FORCEFAULT   0x4
1085 #define ZFS_ONLINE_EXPAND       0x8
1086 #define ZFS_OFFLINE_TEMPORARY   0x1
1087
1088 /*
1089  * Flags for ZFS_IOC_POOL_IMPORT
1090  */
1091 #define ZFS_IMPORT_NORMAL       0x0
1092 #define ZFS_IMPORT_VERBATIM     0x1
1093 #define ZFS_IMPORT_ANY_HOST     0x2
1094 #define ZFS_IMPORT_MISSING_LOG  0x4
1095 #define ZFS_IMPORT_ONLY         0x8
1096 #define ZFS_IMPORT_TEMP_NAME    0x10
1097
1098 /*
1099  * Sysevent payload members.  ZFS will generate the following sysevents with the
1100  * given payloads:
1101  *
1102  *      ESC_ZFS_RESILVER_START
1103  *      ESC_ZFS_RESILVER_END
1104  *      ESC_ZFS_POOL_DESTROY
1105  *      ESC_ZFS_POOL_REGUID
1106  *
1107  *              ZFS_EV_POOL_NAME        DATA_TYPE_STRING
1108  *              ZFS_EV_POOL_GUID        DATA_TYPE_UINT64
1109  *
1110  *      ESC_ZFS_VDEV_REMOVE
1111  *      ESC_ZFS_VDEV_CLEAR
1112  *      ESC_ZFS_VDEV_CHECK
1113  *
1114  *              ZFS_EV_POOL_NAME        DATA_TYPE_STRING
1115  *              ZFS_EV_POOL_GUID        DATA_TYPE_UINT64
1116  *              ZFS_EV_VDEV_PATH        DATA_TYPE_STRING        (optional)
1117  *              ZFS_EV_VDEV_GUID        DATA_TYPE_UINT64
1118  */
1119 #define ZFS_EV_POOL_NAME        "pool_name"
1120 #define ZFS_EV_POOL_GUID        "pool_guid"
1121 #define ZFS_EV_VDEV_PATH        "vdev_path"
1122 #define ZFS_EV_VDEV_GUID        "vdev_guid"
1123
1124 #ifdef  __cplusplus
1125 }
1126 #endif
1127
1128 #endif  /* _SYS_FS_ZFS_H */