sys/contrib/openzfs/module/zcommon/zfeature_common.c

   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) 2011, 2018 by Delphix. All rights reserved.
  24  * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
  25  * Copyright (c) 2013, Joyent, Inc. All rights reserved.
  26  * Copyright (c) 2014, Nexenta Systems, Inc. All rights reserved.
  27  * Copyright (c) 2017, Intel Corporation.
  28  * Copyright (c) 2019, Klara Inc.
  29  * Copyright (c) 2019, Allan Jude
  30  */
  31
  32 #ifndef _KERNEL
  33 #include <errno.h>
  34 #include <string.h>
  35 #include <dirent.h>
  36 #include <search.h>
  37 #include <sys/stat.h>
  38 #endif
  39 #include <sys/debug.h>
  40 #include <sys/fs/zfs.h>
  41 #include <sys/inttypes.h>
  42 #include <sys/types.h>
  43 #include <sys/param.h>
  44 #include <sys/zfs_sysfs.h>
  45 #include "zfeature_common.h"
  46
  47 /*
  48  * Set to disable all feature checks while opening pools, allowing pools with
  49  * unsupported features to be opened. Set for testing only.
  50  */
  51 boolean_t zfeature_checks_disable = B_FALSE;
  52
  53 zfeature_info_t spa_feature_table[SPA_FEATURES];
  54
  55 /*
  56  * Valid characters for feature guids. This list is mainly for aesthetic
  57  * purposes and could be expanded in the future. There are different allowed
  58  * characters in the guids reverse dns portion (before the colon) and its
  59  * short name (after the colon).
  60  */
  61 static int
  62 valid_char(char c, boolean_t after_colon)
  63 {
  64         return ((c >= 'a' && c <= 'z') ||
  65             (c >= '0' && c <= '9') ||
  66             (after_colon && c == '_') ||
  67             (!after_colon && (c == '.' || c == '-')));
  68 }
  69
  70 /*
  71  * Every feature guid must contain exactly one colon which separates a reverse
  72  * dns organization name from the feature's "short" name (e.g.
  73  * "com.company:feature_name").
  74  */
  75 boolean_t
  76 zfeature_is_valid_guid(const char *name)
  77 {
  78         int i;
  79         boolean_t has_colon = B_FALSE;
  80
  81         i = 0;
  82         while (name[i] != '\0') {
  83                 char c = name[i++];
  84                 if (c == ':') {
  85                         if (has_colon)
  86                                 return (B_FALSE);
  87                         has_colon = B_TRUE;
  88                         continue;
  89                 }
  90                 if (!valid_char(c, has_colon))
  91                         return (B_FALSE);
  92         }
  93
  94         return (has_colon);
  95 }
  96
  97 boolean_t
  98 zfeature_is_supported(const char *guid)
  99 {
 100         if (zfeature_checks_disable)
 101                 return (B_TRUE);
 102
 103         for (spa_feature_t i = 0; i < SPA_FEATURES; i++) {
 104                 zfeature_info_t *feature = &spa_feature_table[i];
 105                 if (!feature->fi_zfs_mod_supported)
 106                         continue;
 107                 if (strcmp(guid, feature->fi_guid) == 0)
 108                         return (B_TRUE);
 109         }
 110         return (B_FALSE);
 111 }
 112
 113 int
 114 zfeature_lookup_guid(const char *guid, spa_feature_t *res)
 115 {
 116         for (spa_feature_t i = 0; i < SPA_FEATURES; i++) {
 117                 zfeature_info_t *feature = &spa_feature_table[i];
 118                 if (!feature->fi_zfs_mod_supported)
 119                         continue;
 120                 if (strcmp(guid, feature->fi_guid) == 0) {
 121                         if (res != NULL)
 122                                 *res = i;
 123                         return (0);
 124                 }
 125         }
 126
 127         return (ENOENT);
 128 }
 129
 130 int
 131 zfeature_lookup_name(const char *name, spa_feature_t *res)
 132 {
 133         for (spa_feature_t i = 0; i < SPA_FEATURES; i++) {
 134                 zfeature_info_t *feature = &spa_feature_table[i];
 135                 if (!feature->fi_zfs_mod_supported)
 136                         continue;
 137                 if (strcmp(name, feature->fi_uname) == 0) {
 138                         if (res != NULL)
 139                                 *res = i;
 140                         return (0);
 141                 }
 142         }
 143
 144         return (ENOENT);
 145 }
 146
 147 boolean_t
 148 zfeature_depends_on(spa_feature_t fid, spa_feature_t check)
 149 {
 150         zfeature_info_t *feature = &spa_feature_table[fid];
 151
 152         for (int i = 0; feature->fi_depends[i] != SPA_FEATURE_NONE; i++) {
 153                 if (feature->fi_depends[i] == check)
 154                         return (B_TRUE);
 155         }
 156         return (B_FALSE);
 157 }
 158
 159 static boolean_t
 160 deps_contains_feature(const spa_feature_t *deps, const spa_feature_t feature)
 161 {
 162         for (int i = 0; deps[i] != SPA_FEATURE_NONE; i++)
 163                 if (deps[i] == feature)
 164                         return (B_TRUE);
 165
 166         return (B_FALSE);
 167 }
 168
 169 #define STRCMP ((int(*)(const void *, const void *))&strcmp)
 170 struct zfs_mod_supported_features {
 171         void *tree;
 172         boolean_t all_features;
 173 };
 174
 175 struct zfs_mod_supported_features *
 176 zfs_mod_list_supported(const char *scope)
 177 {
 178 #if defined(__FreeBSD__) || defined(_KERNEL) || defined(LIB_ZPOOL_BUILD)
 179         (void) scope;
 180         return (NULL);
 181 #else
 182         struct zfs_mod_supported_features *ret = calloc(1, sizeof (*ret));
 183         if (ret == NULL)
 184                 return (NULL);
 185
 186         DIR *sysfs_dir = NULL;
 187         char path[128];
 188
 189         if (snprintf(path, sizeof (path), "%s/%s",
 190             ZFS_SYSFS_DIR, scope) < sizeof (path))
 191                 sysfs_dir = opendir(path);
 192         if (sysfs_dir == NULL && errno == ENOENT) {
 193                 if (snprintf(path, sizeof (path), "%s/%s",
 194                     ZFS_SYSFS_ALT_DIR, scope) < sizeof (path))
 195                         sysfs_dir = opendir(path);
 196         }
 197         if (sysfs_dir == NULL) {
 198                 ret->all_features = errno == ENOENT &&
 199                     (access(ZFS_SYSFS_DIR, F_OK) == 0 ||
 200                     access(ZFS_SYSFS_ALT_DIR, F_OK) == 0);
 201                 return (ret);
 202         }
 203
 204         struct dirent *node;
 205         while ((node = readdir(sysfs_dir)) != NULL) {
 206                 if (strcmp(node->d_name, ".") == 0 ||
 207                     strcmp(node->d_name, "..") == 0)
 208                         continue;
 209
 210                 char *name = strdup(node->d_name);
 211                 if (name == NULL) {
 212                         goto nomem;
 213                 }
 214
 215                 if (tsearch(name, &ret->tree, STRCMP) == NULL) {
 216                         /*
 217                          * Don't bother checking for duplicate entries:
 218                          * we're iterating a single directory.
 219                          */
 220                         free(name);
 221                         goto nomem;
 222                 }
 223         }
 224
 225 end:
 226         closedir(sysfs_dir);
 227         return (ret);
 228
 229 nomem:
 230         zfs_mod_list_supported_free(ret);
 231         ret = NULL;
 232         goto end;
 233 #endif
 234 }
 235
 236 void
 237 zfs_mod_list_supported_free(struct zfs_mod_supported_features *list)
 238 {
 239 #if !defined(__FreeBSD__) && !defined(_KERNEL) && !defined(LIB_ZPOOL_BUILD)
 240         if (list) {
 241                 tdestroy(list->tree, free);
 242                 free(list);
 243         }
 244 #else
 245         (void) list;
 246 #endif
 247 }
 248
 249 #if !defined(_KERNEL) && !defined(LIB_ZPOOL_BUILD)
 250 static boolean_t
 251 zfs_mod_supported_impl(const char *scope, const char *name, const char *sysfs)
 252 {
 253         char path[128];
 254         if (snprintf(path, sizeof (path), "%s%s%s%s%s", sysfs,
 255             scope == NULL ? "" : "/", scope ?: "",
 256             name == NULL ? "" : "/", name ?: "") < sizeof (path))
 257                 return (access(path, F_OK) == 0);
 258         else
 259                 return (B_FALSE);
 260 }
 261
 262 boolean_t
 263 zfs_mod_supported(const char *scope, const char *name,
 264     const struct zfs_mod_supported_features *sfeatures)
 265 {
 266         boolean_t supported;
 267
 268         if (sfeatures != NULL)
 269                 return (sfeatures->all_features ||
 270                     tfind(name, &sfeatures->tree, STRCMP));
 271
 272         /*
 273          * Check both the primary and alternate sysfs locations to determine
 274          * if the required functionality is supported.
 275          */
 276         supported = (zfs_mod_supported_impl(scope, name, ZFS_SYSFS_DIR) ||
 277             zfs_mod_supported_impl(scope, name, ZFS_SYSFS_ALT_DIR));
 278
 279         /*
 280          * For backwards compatibility with kernel modules that predate
 281          * supported feature/property checking.  Report the feature/property
 282          * as supported if the kernel module is loaded but the requested
 283          * scope directory does not exist.
 284          */
 285         if (supported == B_FALSE) {
 286                 if ((access(ZFS_SYSFS_DIR, F_OK) == 0 &&
 287                     !zfs_mod_supported_impl(scope, NULL, ZFS_SYSFS_DIR)) ||
 288                     (access(ZFS_SYSFS_ALT_DIR, F_OK) == 0 &&
 289                     !zfs_mod_supported_impl(scope, NULL, ZFS_SYSFS_ALT_DIR))) {
 290                         supported = B_TRUE;
 291                 }
 292         }
 293
 294         return (supported);
 295 }
 296 #endif
 297
 298 static boolean_t
 299 zfs_mod_supported_feature(const char *name,
 300     const struct zfs_mod_supported_features *sfeatures)
 301 {
 302         /*
 303          * The zfs module spa_feature_table[], whether in-kernel or in
 304          * libzpool, always supports all the features. libzfs needs to
 305          * query the running module, via sysfs, to determine which
 306          * features are supported.
 307          *
 308          * The equivalent _can_ be done on FreeBSD by way of the sysctl
 309          * tree, but this has not been done yet.  Therefore, we return
 310          * that all features are supported.
 311          */
 312
 313 #if defined(_KERNEL) || defined(LIB_ZPOOL_BUILD) || defined(__FreeBSD__)
 314         (void) name, (void) sfeatures;
 315         return (B_TRUE);
 316 #else
 317         return (zfs_mod_supported(ZFS_SYSFS_POOL_FEATURES, name, sfeatures));
 318 #endif
 319 }
 320
 321 static void
 322 zfeature_register(spa_feature_t fid, const char *guid, const char *name,
 323     const char *desc, zfeature_flags_t flags, zfeature_type_t type,
 324     const spa_feature_t *deps,
 325     const struct zfs_mod_supported_features *sfeatures)
 326 {
 327         zfeature_info_t *feature = &spa_feature_table[fid];
 328         static const spa_feature_t nodeps[] = { SPA_FEATURE_NONE };
 329
 330         ASSERT(name != NULL);
 331         ASSERT(desc != NULL);
 332         ASSERT((flags & ZFEATURE_FLAG_READONLY_COMPAT) == 0 ||
 333             (flags & ZFEATURE_FLAG_MOS) == 0);
 334         ASSERT3U(fid, <, SPA_FEATURES);
 335         ASSERT(zfeature_is_valid_guid(guid));
 336
 337         if (deps == NULL)
 338                 deps = nodeps;
 339
 340         VERIFY(((flags & ZFEATURE_FLAG_PER_DATASET) == 0) ||
 341             (deps_contains_feature(deps, SPA_FEATURE_EXTENSIBLE_DATASET)));
 342
 343         feature->fi_feature = fid;
 344         feature->fi_guid = guid;
 345         feature->fi_uname = name;
 346         feature->fi_desc = desc;
 347         feature->fi_flags = flags;
 348         feature->fi_type = type;
 349         feature->fi_depends = deps;
 350         feature->fi_zfs_mod_supported =
 351             zfs_mod_supported_feature(guid, sfeatures);
 352 }
 353
 354 /*
 355  * Every feature has a GUID of the form com.example:feature_name.  The
 356  * reversed DNS name ensures that the feature's GUID is unique across all ZFS
 357  * implementations.  This allows companies to independently develop and
 358  * release features.  Examples include org.delphix and org.datto.  Previously,
 359  * features developed on one implementation have used that implementation's
 360  * domain name (e.g. org.illumos and org.zfsonlinux).  Use of the org.openzfs
 361  * domain name is recommended for new features which are developed by the
 362  * OpenZFS community and its platforms.  This domain may optionally be used by
 363  * companies developing features for initial release through an OpenZFS
 364  * implementation.  Use of the org.openzfs domain requires reserving the
 365  * feature name in advance with the OpenZFS project.
 366  */
 367 void
 368 zpool_feature_init(void)
 369 {
 370         struct zfs_mod_supported_features *sfeatures =
 371             zfs_mod_list_supported(ZFS_SYSFS_POOL_FEATURES);
 372
 373         zfeature_register(SPA_FEATURE_ASYNC_DESTROY,
 374             "com.delphix:async_destroy", "async_destroy",
 375             "Destroy filesystems asynchronously.",
 376             ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL,
 377             sfeatures);
 378
 379         zfeature_register(SPA_FEATURE_EMPTY_BPOBJ,
 380             "com.delphix:empty_bpobj", "empty_bpobj",
 381             "Snapshots use less space.",
 382             ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL,
 383             sfeatures);
 384
 385         zfeature_register(SPA_FEATURE_LZ4_COMPRESS,
 386             "org.illumos:lz4_compress", "lz4_compress",
 387             "LZ4 compression algorithm support.",
 388             ZFEATURE_FLAG_ACTIVATE_ON_ENABLE, ZFEATURE_TYPE_BOOLEAN, NULL,
 389             sfeatures);
 390
 391         zfeature_register(SPA_FEATURE_MULTI_VDEV_CRASH_DUMP,
 392             "com.joyent:multi_vdev_crash_dump", "multi_vdev_crash_dump",
 393             "Crash dumps to multiple vdev pools.",
 394             0, ZFEATURE_TYPE_BOOLEAN, NULL, sfeatures);
 395
 396         zfeature_register(SPA_FEATURE_SPACEMAP_HISTOGRAM,
 397             "com.delphix:spacemap_histogram", "spacemap_histogram",
 398             "Spacemaps maintain space histograms.",
 399             ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL,
 400             sfeatures);
 401
 402         zfeature_register(SPA_FEATURE_ENABLED_TXG,
 403             "com.delphix:enabled_txg", "enabled_txg",
 404             "Record txg at which a feature is enabled",
 405             ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL,
 406             sfeatures);
 407
 408         {
 409                 static const spa_feature_t hole_birth_deps[] = {
 410                         SPA_FEATURE_ENABLED_TXG,
 411                         SPA_FEATURE_NONE
 412                 };
 413                 zfeature_register(SPA_FEATURE_HOLE_BIRTH,
 414                     "com.delphix:hole_birth", "hole_birth",
 415                     "Retain hole birth txg for more precise zfs send",
 416                     ZFEATURE_FLAG_MOS | ZFEATURE_FLAG_ACTIVATE_ON_ENABLE,
 417                     ZFEATURE_TYPE_BOOLEAN, hole_birth_deps, sfeatures);
 418         }
 419
 420         zfeature_register(SPA_FEATURE_POOL_CHECKPOINT,
 421             "com.delphix:zpool_checkpoint", "zpool_checkpoint",
 422             "Pool state can be checkpointed, allowing rewind later.",
 423             ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL,
 424             sfeatures);
 425
 426         zfeature_register(SPA_FEATURE_SPACEMAP_V2,
 427             "com.delphix:spacemap_v2", "spacemap_v2",
 428             "Space maps representing large segments are more efficient.",
 429             ZFEATURE_FLAG_READONLY_COMPAT | ZFEATURE_FLAG_ACTIVATE_ON_ENABLE,
 430             ZFEATURE_TYPE_BOOLEAN, NULL, sfeatures);
 431
 432         zfeature_register(SPA_FEATURE_EXTENSIBLE_DATASET,
 433             "com.delphix:extensible_dataset", "extensible_dataset",
 434             "Enhanced dataset functionality, used by other features.",
 435             0, ZFEATURE_TYPE_BOOLEAN, NULL, sfeatures);
 436
 437         {
 438                 static const spa_feature_t bookmarks_deps[] = {
 439                         SPA_FEATURE_EXTENSIBLE_DATASET,
 440                         SPA_FEATURE_NONE
 441                 };
 442
 443                 zfeature_register(SPA_FEATURE_BOOKMARKS,
 444                     "com.delphix:bookmarks", "bookmarks",
 445                     "\"zfs bookmark\" command",
 446                     ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN,
 447                     bookmarks_deps, sfeatures);
 448         }
 449
 450         {
 451                 static const spa_feature_t filesystem_limits_deps[] = {
 452                         SPA_FEATURE_EXTENSIBLE_DATASET,
 453                         SPA_FEATURE_NONE
 454                 };
 455                 zfeature_register(SPA_FEATURE_FS_SS_LIMIT,
 456                     "com.joyent:filesystem_limits", "filesystem_limits",
 457                     "Filesystem and snapshot limits.",
 458                     ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN,
 459                     filesystem_limits_deps, sfeatures);
 460         }
 461
 462         zfeature_register(SPA_FEATURE_EMBEDDED_DATA,
 463             "com.delphix:embedded_data", "embedded_data",
 464             "Blocks which compress very well use even less space.",
 465             ZFEATURE_FLAG_MOS | ZFEATURE_FLAG_ACTIVATE_ON_ENABLE,
 466             ZFEATURE_TYPE_BOOLEAN, NULL, sfeatures);
 467
 468         {
 469                 static const spa_feature_t livelist_deps[] = {
 470                         SPA_FEATURE_EXTENSIBLE_DATASET,
 471                         SPA_FEATURE_NONE
 472                 };
 473                 zfeature_register(SPA_FEATURE_LIVELIST,
 474                     "com.delphix:livelist", "livelist",
 475                     "Improved clone deletion performance.",
 476                     ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN,
 477                     livelist_deps, sfeatures);
 478         }
 479
 480         {
 481                 static const spa_feature_t log_spacemap_deps[] = {
 482                         SPA_FEATURE_SPACEMAP_V2,
 483                         SPA_FEATURE_NONE
 484                 };
 485                 zfeature_register(SPA_FEATURE_LOG_SPACEMAP,
 486                     "com.delphix:log_spacemap", "log_spacemap",
 487                     "Log metaslab changes on a single spacemap and "
 488                     "flush them periodically.",
 489                     ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN,
 490                     log_spacemap_deps, sfeatures);
 491         }
 492
 493         {
 494                 static const spa_feature_t large_blocks_deps[] = {
 495                         SPA_FEATURE_EXTENSIBLE_DATASET,
 496                         SPA_FEATURE_NONE
 497                 };
 498                 zfeature_register(SPA_FEATURE_LARGE_BLOCKS,
 499                     "org.open-zfs:large_blocks", "large_blocks",
 500                     "Support for blocks larger than 128KB.",
 501                     ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
 502                     large_blocks_deps, sfeatures);
 503         }
 504
 505         {
 506                 static const spa_feature_t large_dnode_deps[] = {
 507                         SPA_FEATURE_EXTENSIBLE_DATASET,
 508                         SPA_FEATURE_NONE
 509                 };
 510                 zfeature_register(SPA_FEATURE_LARGE_DNODE,
 511                     "org.zfsonlinux:large_dnode", "large_dnode",
 512                     "Variable on-disk size of dnodes.",
 513                     ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
 514                     large_dnode_deps, sfeatures);
 515         }
 516
 517         {
 518                 static const spa_feature_t sha512_deps[] = {
 519                         SPA_FEATURE_EXTENSIBLE_DATASET,
 520                         SPA_FEATURE_NONE
 521                 };
 522                 zfeature_register(SPA_FEATURE_SHA512,
 523                     "org.illumos:sha512", "sha512",
 524                     "SHA-512/256 hash algorithm.",
 525                     ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
 526                     sha512_deps, sfeatures);
 527         }
 528
 529         {
 530                 static const spa_feature_t skein_deps[] = {
 531                         SPA_FEATURE_EXTENSIBLE_DATASET,
 532                         SPA_FEATURE_NONE
 533                 };
 534                 zfeature_register(SPA_FEATURE_SKEIN,
 535                     "org.illumos:skein", "skein",
 536                     "Skein hash algorithm.",
 537                     ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
 538                     skein_deps, sfeatures);
 539         }
 540
 541         {
 542                 static const spa_feature_t edonr_deps[] = {
 543                         SPA_FEATURE_EXTENSIBLE_DATASET,
 544                         SPA_FEATURE_NONE
 545                 };
 546                 zfeature_register(SPA_FEATURE_EDONR,
 547                     "org.illumos:edonr", "edonr",
 548                     "Edon-R hash algorithm.",
 549                     ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
 550                     edonr_deps, sfeatures);
 551         }
 552
 553         {
 554                 static const spa_feature_t redact_books_deps[] = {
 555                         SPA_FEATURE_BOOKMARK_V2,
 556                         SPA_FEATURE_EXTENSIBLE_DATASET,
 557                         SPA_FEATURE_BOOKMARKS,
 558                         SPA_FEATURE_NONE
 559                 };
 560                 zfeature_register(SPA_FEATURE_REDACTION_BOOKMARKS,
 561                     "com.delphix:redaction_bookmarks", "redaction_bookmarks",
 562                     "Support for bookmarks which store redaction lists for zfs "
 563                     "redacted send/recv.", 0, ZFEATURE_TYPE_BOOLEAN,
 564                     redact_books_deps, sfeatures);
 565         }
 566
 567         {
 568                 static const spa_feature_t redact_datasets_deps[] = {
 569                         SPA_FEATURE_EXTENSIBLE_DATASET,
 570                         SPA_FEATURE_NONE
 571                 };
 572                 zfeature_register(SPA_FEATURE_REDACTED_DATASETS,
 573                     "com.delphix:redacted_datasets", "redacted_datasets",
 574                     "Support for redacted datasets, produced by receiving "
 575                     "a redacted zfs send stream.",
 576                     ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_UINT64_ARRAY,
 577                     redact_datasets_deps, sfeatures);
 578         }
 579
 580         {
 581                 static const spa_feature_t bookmark_written_deps[] = {
 582                         SPA_FEATURE_BOOKMARK_V2,
 583                         SPA_FEATURE_EXTENSIBLE_DATASET,
 584                         SPA_FEATURE_BOOKMARKS,
 585                         SPA_FEATURE_NONE
 586                 };
 587                 zfeature_register(SPA_FEATURE_BOOKMARK_WRITTEN,
 588                     "com.delphix:bookmark_written", "bookmark_written",
 589                     "Additional accounting, enabling the written#<bookmark> "
 590                     "property (space written since a bookmark), "
 591                     "and estimates of send stream sizes for incrementals from "
 592                     "bookmarks.",
 593                     0, ZFEATURE_TYPE_BOOLEAN, bookmark_written_deps, sfeatures);
 594         }
 595
 596         zfeature_register(SPA_FEATURE_DEVICE_REMOVAL,
 597             "com.delphix:device_removal", "device_removal",
 598             "Top-level vdevs can be removed, reducing logical pool size.",
 599             ZFEATURE_FLAG_MOS, ZFEATURE_TYPE_BOOLEAN, NULL, sfeatures);
 600
 601         {
 602                 static const spa_feature_t obsolete_counts_deps[] = {
 603                         SPA_FEATURE_EXTENSIBLE_DATASET,
 604                         SPA_FEATURE_DEVICE_REMOVAL,
 605                         SPA_FEATURE_NONE
 606                 };
 607                 zfeature_register(SPA_FEATURE_OBSOLETE_COUNTS,
 608                     "com.delphix:obsolete_counts", "obsolete_counts",
 609                     "Reduce memory used by removed devices when their blocks "
 610                     "are freed or remapped.",
 611                     ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN,
 612                     obsolete_counts_deps, sfeatures);
 613         }
 614
 615         {
 616                 static const spa_feature_t userobj_accounting_deps[] = {
 617                         SPA_FEATURE_EXTENSIBLE_DATASET,
 618                         SPA_FEATURE_NONE
 619                 };
 620                 zfeature_register(SPA_FEATURE_USEROBJ_ACCOUNTING,
 621                     "org.zfsonlinux:userobj_accounting", "userobj_accounting",
 622                     "User/Group object accounting.",
 623                     ZFEATURE_FLAG_READONLY_COMPAT | ZFEATURE_FLAG_PER_DATASET,
 624                     ZFEATURE_TYPE_BOOLEAN, userobj_accounting_deps, sfeatures);
 625         }
 626
 627         {
 628                 static const spa_feature_t bookmark_v2_deps[] = {
 629                         SPA_FEATURE_EXTENSIBLE_DATASET,
 630                         SPA_FEATURE_BOOKMARKS,
 631                         SPA_FEATURE_NONE
 632                 };
 633                 zfeature_register(SPA_FEATURE_BOOKMARK_V2,
 634                     "com.datto:bookmark_v2", "bookmark_v2",
 635                     "Support for larger bookmarks",
 636                     0, ZFEATURE_TYPE_BOOLEAN, bookmark_v2_deps, sfeatures);
 637         }
 638
 639         {
 640                 static const spa_feature_t encryption_deps[] = {
 641                         SPA_FEATURE_EXTENSIBLE_DATASET,
 642                         SPA_FEATURE_BOOKMARK_V2,
 643                         SPA_FEATURE_NONE
 644                 };
 645                 zfeature_register(SPA_FEATURE_ENCRYPTION,
 646                     "com.datto:encryption", "encryption",
 647                     "Support for dataset level encryption",
 648                     ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
 649                     encryption_deps, sfeatures);
 650         }
 651
 652         {
 653                 static const spa_feature_t project_quota_deps[] = {
 654                         SPA_FEATURE_EXTENSIBLE_DATASET,
 655                         SPA_FEATURE_NONE
 656                 };
 657                 zfeature_register(SPA_FEATURE_PROJECT_QUOTA,
 658                     "org.zfsonlinux:project_quota", "project_quota",
 659                     "space/object accounting based on project ID.",
 660                     ZFEATURE_FLAG_READONLY_COMPAT | ZFEATURE_FLAG_PER_DATASET,
 661                     ZFEATURE_TYPE_BOOLEAN, project_quota_deps, sfeatures);
 662         }
 663
 664         zfeature_register(SPA_FEATURE_ALLOCATION_CLASSES,
 665             "org.zfsonlinux:allocation_classes", "allocation_classes",
 666             "Support for separate allocation classes.",
 667             ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL,
 668             sfeatures);
 669
 670         zfeature_register(SPA_FEATURE_RESILVER_DEFER,
 671             "com.datto:resilver_defer", "resilver_defer",
 672             "Support for deferring new resilvers when one is already running.",
 673             ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL,
 674             sfeatures);
 675
 676         zfeature_register(SPA_FEATURE_DEVICE_REBUILD,
 677             "org.openzfs:device_rebuild", "device_rebuild",
 678             "Support for sequential mirror/dRAID device rebuilds",
 679             ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL,
 680             sfeatures);
 681
 682         {
 683                 static const spa_feature_t zstd_deps[] = {
 684                         SPA_FEATURE_EXTENSIBLE_DATASET,
 685                         SPA_FEATURE_NONE
 686                 };
 687                 zfeature_register(SPA_FEATURE_ZSTD_COMPRESS,
 688                     "org.freebsd:zstd_compress", "zstd_compress",
 689                     "zstd compression algorithm support.",
 690                     ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN, zstd_deps,
 691                     sfeatures);
 692         }
 693
 694         zfeature_register(SPA_FEATURE_DRAID,
 695             "org.openzfs:draid", "draid", "Support for distributed spare RAID",
 696             ZFEATURE_FLAG_MOS, ZFEATURE_TYPE_BOOLEAN, NULL, sfeatures);
 697
 698         {
 699         static const spa_feature_t zilsaxattr_deps[] = {
 700                 SPA_FEATURE_EXTENSIBLE_DATASET,
 701                 SPA_FEATURE_NONE
 702         };
 703         zfeature_register(SPA_FEATURE_ZILSAXATTR,
 704             "org.openzfs:zilsaxattr", "zilsaxattr",
 705             "Support for xattr=sa extended attribute logging in ZIL.",
 706             ZFEATURE_FLAG_PER_DATASET | ZFEATURE_FLAG_READONLY_COMPAT,
 707             ZFEATURE_TYPE_BOOLEAN, zilsaxattr_deps, sfeatures);
 708         }
 709
 710         zfs_mod_list_supported_free(sfeatures);
 711 }
 712
 713 #if defined(_KERNEL)
 714 EXPORT_SYMBOL(zfeature_lookup_guid);
 715 EXPORT_SYMBOL(zfeature_lookup_name);
 716 EXPORT_SYMBOL(zfeature_is_supported);
 717 EXPORT_SYMBOL(zfeature_is_valid_guid);
 718 EXPORT_SYMBOL(zfeature_depends_on);
 719 EXPORT_SYMBOL(zpool_feature_init);
 720 EXPORT_SYMBOL(spa_feature_table);
 721 #endif