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 <sys/stat.h> 36 #endif 37 #include <sys/debug.h> 38 #include <sys/fs/zfs.h> 39 #include <sys/inttypes.h> 40 #include <sys/types.h> 41 #include <sys/param.h> 42 #include <sys/zfs_sysfs.h> 43 #include "zfeature_common.h" 44 45 /* 46 * Set to disable all feature checks while opening pools, allowing pools with 47 * unsupported features to be opened. Set for testing only. 48 */ 49 boolean_t zfeature_checks_disable = B_FALSE; 50 51 zfeature_info_t spa_feature_table[SPA_FEATURES]; 52 53 /* 54 * Valid characters for feature guids. This list is mainly for aesthetic 55 * purposes and could be expanded in the future. There are different allowed 56 * characters in the guids reverse dns portion (before the colon) and its 57 * short name (after the colon). 58 */ 59 static int 60 valid_char(char c, boolean_t after_colon) 61 { 62 return ((c >= 'a' && c <= 'z') || 63 (c >= '0' && c <= '9') || 64 (after_colon && c == '_') || 65 (!after_colon && (c == '.' || c == '-'))); 66 } 67 68 /* 69 * Every feature guid must contain exactly one colon which separates a reverse 70 * dns organization name from the feature's "short" name (e.g. 71 * "com.company:feature_name"). 72 */ 73 boolean_t 74 zfeature_is_valid_guid(const char *name) 75 { 76 int i; 77 boolean_t has_colon = B_FALSE; 78 79 i = 0; 80 while (name[i] != '\0') { 81 char c = name[i++]; 82 if (c == ':') { 83 if (has_colon) 84 return (B_FALSE); 85 has_colon = B_TRUE; 86 continue; 87 } 88 if (!valid_char(c, has_colon)) 89 return (B_FALSE); 90 } 91 92 return (has_colon); 93 } 94 95 boolean_t 96 zfeature_is_supported(const char *guid) 97 { 98 if (zfeature_checks_disable) 99 return (B_TRUE); 100 101 for (spa_feature_t i = 0; i < SPA_FEATURES; i++) { 102 zfeature_info_t *feature = &spa_feature_table[i]; 103 if (!feature->fi_zfs_mod_supported) 104 continue; 105 if (strcmp(guid, feature->fi_guid) == 0) 106 return (B_TRUE); 107 } 108 return (B_FALSE); 109 } 110 111 int 112 zfeature_lookup_guid(const char *guid, spa_feature_t *res) 113 { 114 for (spa_feature_t i = 0; i < SPA_FEATURES; i++) { 115 zfeature_info_t *feature = &spa_feature_table[i]; 116 if (!feature->fi_zfs_mod_supported) 117 continue; 118 if (strcmp(guid, feature->fi_guid) == 0) { 119 if (res != NULL) 120 *res = i; 121 return (0); 122 } 123 } 124 125 return (ENOENT); 126 } 127 128 int 129 zfeature_lookup_name(const char *name, spa_feature_t *res) 130 { 131 for (spa_feature_t i = 0; i < SPA_FEATURES; i++) { 132 zfeature_info_t *feature = &spa_feature_table[i]; 133 if (!feature->fi_zfs_mod_supported) 134 continue; 135 if (strcmp(name, feature->fi_uname) == 0) { 136 if (res != NULL) 137 *res = i; 138 return (0); 139 } 140 } 141 142 return (ENOENT); 143 } 144 145 boolean_t 146 zfeature_depends_on(spa_feature_t fid, spa_feature_t check) 147 { 148 zfeature_info_t *feature = &spa_feature_table[fid]; 149 150 for (int i = 0; feature->fi_depends[i] != SPA_FEATURE_NONE; i++) { 151 if (feature->fi_depends[i] == check) 152 return (B_TRUE); 153 } 154 return (B_FALSE); 155 } 156 157 static boolean_t 158 deps_contains_feature(const spa_feature_t *deps, const spa_feature_t feature) 159 { 160 for (int i = 0; deps[i] != SPA_FEATURE_NONE; i++) 161 if (deps[i] == feature) 162 return (B_TRUE); 163 164 return (B_FALSE); 165 } 166 167 #if !defined(_KERNEL) && !defined(LIB_ZPOOL_BUILD) 168 static boolean_t 169 zfs_mod_supported_impl(const char *scope, const char *name, const char *sysfs) 170 { 171 boolean_t supported = B_FALSE; 172 char *path; 173 174 int len = asprintf(&path, "%s%s%s%s%s", sysfs, 175 scope == NULL ? "" : "/", scope == NULL ? "" : scope, 176 name == NULL ? "" : "/", name == NULL ? "" : name); 177 if (len > 0) { 178 struct stat64 statbuf; 179 supported = !!(stat64(path, &statbuf) == 0); 180 free(path); 181 } 182 183 return (supported); 184 } 185 186 boolean_t 187 zfs_mod_supported(const char *scope, const char *name) 188 { 189 boolean_t supported; 190 191 /* 192 * Check both the primary and alternate sysfs locations to determine 193 * if the required functionality is supported. 194 */ 195 supported = (zfs_mod_supported_impl(scope, name, ZFS_SYSFS_DIR) || 196 zfs_mod_supported_impl(scope, name, ZFS_SYSFS_ALT_DIR)); 197 198 /* 199 * For backwards compatibility with kernel modules that predate 200 * supported feature/property checking. Report the feature/property 201 * as supported if the kernel module is loaded but the requested 202 * scope directory does not exist. 203 */ 204 if (supported == B_FALSE) { 205 struct stat64 statbuf; 206 if ((stat64(ZFS_SYSFS_DIR, &statbuf) == 0) && 207 !zfs_mod_supported_impl(scope, NULL, ZFS_SYSFS_DIR) && 208 !zfs_mod_supported_impl(scope, NULL, ZFS_SYSFS_ALT_DIR)) { 209 supported = B_TRUE; 210 } 211 } 212 213 return (supported); 214 } 215 #endif 216 217 static boolean_t 218 zfs_mod_supported_feature(const char *name) 219 { 220 /* 221 * The zfs module spa_feature_table[], whether in-kernel or in 222 * libzpool, always supports all the features. libzfs needs to 223 * query the running module, via sysfs, to determine which 224 * features are supported. 225 * 226 * The equivalent _can_ be done on FreeBSD by way of the sysctl 227 * tree, but this has not been done yet. Therefore, we return 228 * that all features are supported. 229 */ 230 231 #if defined(_KERNEL) || defined(LIB_ZPOOL_BUILD) || defined(__FreeBSD__) 232 (void) name; 233 return (B_TRUE); 234 #else 235 return (zfs_mod_supported(ZFS_SYSFS_POOL_FEATURES, name)); 236 #endif 237 } 238 239 static void 240 zfeature_register(spa_feature_t fid, const char *guid, const char *name, 241 const char *desc, zfeature_flags_t flags, zfeature_type_t type, 242 const spa_feature_t *deps) 243 { 244 zfeature_info_t *feature = &spa_feature_table[fid]; 245 static spa_feature_t nodeps[] = { SPA_FEATURE_NONE }; 246 247 ASSERT(name != NULL); 248 ASSERT(desc != NULL); 249 ASSERT((flags & ZFEATURE_FLAG_READONLY_COMPAT) == 0 || 250 (flags & ZFEATURE_FLAG_MOS) == 0); 251 ASSERT3U(fid, <, SPA_FEATURES); 252 ASSERT(zfeature_is_valid_guid(guid)); 253 254 if (deps == NULL) 255 deps = nodeps; 256 257 VERIFY(((flags & ZFEATURE_FLAG_PER_DATASET) == 0) || 258 (deps_contains_feature(deps, SPA_FEATURE_EXTENSIBLE_DATASET))); 259 260 feature->fi_feature = fid; 261 feature->fi_guid = guid; 262 feature->fi_uname = name; 263 feature->fi_desc = desc; 264 feature->fi_flags = flags; 265 feature->fi_type = type; 266 feature->fi_depends = deps; 267 feature->fi_zfs_mod_supported = zfs_mod_supported_feature(guid); 268 } 269 270 /* 271 * Every feature has a GUID of the form com.example:feature_name. The 272 * reversed DNS name ensures that the feature's GUID is unique across all ZFS 273 * implementations. This allows companies to independently develop and 274 * release features. Examples include org.delphix and org.datto. Previously, 275 * features developed on one implementation have used that implementation's 276 * domain name (e.g. org.illumos and org.zfsonlinux). Use of the org.openzfs 277 * domain name is recommended for new features which are developed by the 278 * OpenZFS community and its platforms. This domain may optionally be used by 279 * companies developing features for initial release through an OpenZFS 280 * implementation. Use of the org.openzfs domain requires reserving the 281 * feature name in advance with the OpenZFS project. 282 */ 283 void 284 zpool_feature_init(void) 285 { 286 zfeature_register(SPA_FEATURE_ASYNC_DESTROY, 287 "com.delphix:async_destroy", "async_destroy", 288 "Destroy filesystems asynchronously.", 289 ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL); 290 291 zfeature_register(SPA_FEATURE_EMPTY_BPOBJ, 292 "com.delphix:empty_bpobj", "empty_bpobj", 293 "Snapshots use less space.", 294 ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL); 295 296 zfeature_register(SPA_FEATURE_LZ4_COMPRESS, 297 "org.illumos:lz4_compress", "lz4_compress", 298 "LZ4 compression algorithm support.", 299 ZFEATURE_FLAG_ACTIVATE_ON_ENABLE, ZFEATURE_TYPE_BOOLEAN, NULL); 300 301 zfeature_register(SPA_FEATURE_MULTI_VDEV_CRASH_DUMP, 302 "com.joyent:multi_vdev_crash_dump", "multi_vdev_crash_dump", 303 "Crash dumps to multiple vdev pools.", 304 0, ZFEATURE_TYPE_BOOLEAN, NULL); 305 306 zfeature_register(SPA_FEATURE_SPACEMAP_HISTOGRAM, 307 "com.delphix:spacemap_histogram", "spacemap_histogram", 308 "Spacemaps maintain space histograms.", 309 ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL); 310 311 zfeature_register(SPA_FEATURE_ENABLED_TXG, 312 "com.delphix:enabled_txg", "enabled_txg", 313 "Record txg at which a feature is enabled", 314 ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL); 315 316 { 317 static const spa_feature_t hole_birth_deps[] = { 318 SPA_FEATURE_ENABLED_TXG, 319 SPA_FEATURE_NONE 320 }; 321 zfeature_register(SPA_FEATURE_HOLE_BIRTH, 322 "com.delphix:hole_birth", "hole_birth", 323 "Retain hole birth txg for more precise zfs send", 324 ZFEATURE_FLAG_MOS | ZFEATURE_FLAG_ACTIVATE_ON_ENABLE, 325 ZFEATURE_TYPE_BOOLEAN, hole_birth_deps); 326 } 327 328 zfeature_register(SPA_FEATURE_POOL_CHECKPOINT, 329 "com.delphix:zpool_checkpoint", "zpool_checkpoint", 330 "Pool state can be checkpointed, allowing rewind later.", 331 ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL); 332 333 zfeature_register(SPA_FEATURE_SPACEMAP_V2, 334 "com.delphix:spacemap_v2", "spacemap_v2", 335 "Space maps representing large segments are more efficient.", 336 ZFEATURE_FLAG_READONLY_COMPAT | ZFEATURE_FLAG_ACTIVATE_ON_ENABLE, 337 ZFEATURE_TYPE_BOOLEAN, NULL); 338 339 zfeature_register(SPA_FEATURE_EXTENSIBLE_DATASET, 340 "com.delphix:extensible_dataset", "extensible_dataset", 341 "Enhanced dataset functionality, used by other features.", 342 0, ZFEATURE_TYPE_BOOLEAN, NULL); 343 344 { 345 static const spa_feature_t bookmarks_deps[] = { 346 SPA_FEATURE_EXTENSIBLE_DATASET, 347 SPA_FEATURE_NONE 348 }; 349 350 zfeature_register(SPA_FEATURE_BOOKMARKS, 351 "com.delphix:bookmarks", "bookmarks", 352 "\"zfs bookmark\" command", 353 ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, 354 bookmarks_deps); 355 } 356 357 { 358 static const spa_feature_t filesystem_limits_deps[] = { 359 SPA_FEATURE_EXTENSIBLE_DATASET, 360 SPA_FEATURE_NONE 361 }; 362 zfeature_register(SPA_FEATURE_FS_SS_LIMIT, 363 "com.joyent:filesystem_limits", "filesystem_limits", 364 "Filesystem and snapshot limits.", 365 ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, 366 filesystem_limits_deps); 367 } 368 369 zfeature_register(SPA_FEATURE_EMBEDDED_DATA, 370 "com.delphix:embedded_data", "embedded_data", 371 "Blocks which compress very well use even less space.", 372 ZFEATURE_FLAG_MOS | ZFEATURE_FLAG_ACTIVATE_ON_ENABLE, 373 ZFEATURE_TYPE_BOOLEAN, NULL); 374 375 { 376 static const spa_feature_t livelist_deps[] = { 377 SPA_FEATURE_EXTENSIBLE_DATASET, 378 SPA_FEATURE_NONE 379 }; 380 zfeature_register(SPA_FEATURE_LIVELIST, 381 "com.delphix:livelist", "livelist", 382 "Improved clone deletion performance.", 383 ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, 384 livelist_deps); 385 } 386 387 { 388 static const spa_feature_t log_spacemap_deps[] = { 389 SPA_FEATURE_SPACEMAP_V2, 390 SPA_FEATURE_NONE 391 }; 392 zfeature_register(SPA_FEATURE_LOG_SPACEMAP, 393 "com.delphix:log_spacemap", "log_spacemap", 394 "Log metaslab changes on a single spacemap and " 395 "flush them periodically.", 396 ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, 397 log_spacemap_deps); 398 } 399 400 { 401 static const spa_feature_t large_blocks_deps[] = { 402 SPA_FEATURE_EXTENSIBLE_DATASET, 403 SPA_FEATURE_NONE 404 }; 405 zfeature_register(SPA_FEATURE_LARGE_BLOCKS, 406 "org.open-zfs:large_blocks", "large_blocks", 407 "Support for blocks larger than 128KB.", 408 ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN, 409 large_blocks_deps); 410 } 411 412 { 413 static const spa_feature_t large_dnode_deps[] = { 414 SPA_FEATURE_EXTENSIBLE_DATASET, 415 SPA_FEATURE_NONE 416 }; 417 zfeature_register(SPA_FEATURE_LARGE_DNODE, 418 "org.zfsonlinux:large_dnode", "large_dnode", 419 "Variable on-disk size of dnodes.", 420 ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN, 421 large_dnode_deps); 422 } 423 424 { 425 static const spa_feature_t sha512_deps[] = { 426 SPA_FEATURE_EXTENSIBLE_DATASET, 427 SPA_FEATURE_NONE 428 }; 429 zfeature_register(SPA_FEATURE_SHA512, 430 "org.illumos:sha512", "sha512", 431 "SHA-512/256 hash algorithm.", 432 ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN, 433 sha512_deps); 434 } 435 436 { 437 static const spa_feature_t skein_deps[] = { 438 SPA_FEATURE_EXTENSIBLE_DATASET, 439 SPA_FEATURE_NONE 440 }; 441 zfeature_register(SPA_FEATURE_SKEIN, 442 "org.illumos:skein", "skein", 443 "Skein hash algorithm.", 444 ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN, 445 skein_deps); 446 } 447 448 { 449 static const spa_feature_t edonr_deps[] = { 450 SPA_FEATURE_EXTENSIBLE_DATASET, 451 SPA_FEATURE_NONE 452 }; 453 zfeature_register(SPA_FEATURE_EDONR, 454 "org.illumos:edonr", "edonr", 455 "Edon-R hash algorithm.", 456 ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN, 457 edonr_deps); 458 } 459 460 { 461 static const spa_feature_t redact_books_deps[] = { 462 SPA_FEATURE_BOOKMARK_V2, 463 SPA_FEATURE_EXTENSIBLE_DATASET, 464 SPA_FEATURE_BOOKMARKS, 465 SPA_FEATURE_NONE 466 }; 467 zfeature_register(SPA_FEATURE_REDACTION_BOOKMARKS, 468 "com.delphix:redaction_bookmarks", "redaction_bookmarks", 469 "Support for bookmarks which store redaction lists for zfs " 470 "redacted send/recv.", 0, ZFEATURE_TYPE_BOOLEAN, 471 redact_books_deps); 472 } 473 474 { 475 static const spa_feature_t redact_datasets_deps[] = { 476 SPA_FEATURE_EXTENSIBLE_DATASET, 477 SPA_FEATURE_NONE 478 }; 479 zfeature_register(SPA_FEATURE_REDACTED_DATASETS, 480 "com.delphix:redacted_datasets", "redacted_datasets", "Support for " 481 "redacted datasets, produced by receiving a redacted zfs send " 482 "stream.", ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_UINT64_ARRAY, 483 redact_datasets_deps); 484 } 485 486 { 487 static const spa_feature_t bookmark_written_deps[] = { 488 SPA_FEATURE_BOOKMARK_V2, 489 SPA_FEATURE_EXTENSIBLE_DATASET, 490 SPA_FEATURE_BOOKMARKS, 491 SPA_FEATURE_NONE 492 }; 493 zfeature_register(SPA_FEATURE_BOOKMARK_WRITTEN, 494 "com.delphix:bookmark_written", "bookmark_written", 495 "Additional accounting, enabling the written#<bookmark> property" 496 "(space written since a bookmark), and estimates of send stream " 497 "sizes for incrementals from bookmarks.", 498 0, ZFEATURE_TYPE_BOOLEAN, bookmark_written_deps); 499 } 500 501 zfeature_register(SPA_FEATURE_DEVICE_REMOVAL, 502 "com.delphix:device_removal", "device_removal", 503 "Top-level vdevs can be removed, reducing logical pool size.", 504 ZFEATURE_FLAG_MOS, ZFEATURE_TYPE_BOOLEAN, NULL); 505 506 { 507 static const spa_feature_t obsolete_counts_deps[] = { 508 SPA_FEATURE_EXTENSIBLE_DATASET, 509 SPA_FEATURE_DEVICE_REMOVAL, 510 SPA_FEATURE_NONE 511 }; 512 zfeature_register(SPA_FEATURE_OBSOLETE_COUNTS, 513 "com.delphix:obsolete_counts", "obsolete_counts", 514 "Reduce memory used by removed devices when their blocks are " 515 "freed or remapped.", 516 ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, 517 obsolete_counts_deps); 518 } 519 520 { 521 static const spa_feature_t userobj_accounting_deps[] = { 522 SPA_FEATURE_EXTENSIBLE_DATASET, 523 SPA_FEATURE_NONE 524 }; 525 zfeature_register(SPA_FEATURE_USEROBJ_ACCOUNTING, 526 "org.zfsonlinux:userobj_accounting", "userobj_accounting", 527 "User/Group object accounting.", 528 ZFEATURE_FLAG_READONLY_COMPAT | ZFEATURE_FLAG_PER_DATASET, 529 ZFEATURE_TYPE_BOOLEAN, userobj_accounting_deps); 530 } 531 532 { 533 static const spa_feature_t bookmark_v2_deps[] = { 534 SPA_FEATURE_EXTENSIBLE_DATASET, 535 SPA_FEATURE_BOOKMARKS, 536 SPA_FEATURE_NONE 537 }; 538 zfeature_register(SPA_FEATURE_BOOKMARK_V2, 539 "com.datto:bookmark_v2", "bookmark_v2", 540 "Support for larger bookmarks", 541 0, ZFEATURE_TYPE_BOOLEAN, bookmark_v2_deps); 542 } 543 544 { 545 static const spa_feature_t encryption_deps[] = { 546 SPA_FEATURE_EXTENSIBLE_DATASET, 547 SPA_FEATURE_BOOKMARK_V2, 548 SPA_FEATURE_NONE 549 }; 550 zfeature_register(SPA_FEATURE_ENCRYPTION, 551 "com.datto:encryption", "encryption", 552 "Support for dataset level encryption", 553 ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN, 554 encryption_deps); 555 } 556 557 { 558 static const spa_feature_t project_quota_deps[] = { 559 SPA_FEATURE_EXTENSIBLE_DATASET, 560 SPA_FEATURE_NONE 561 }; 562 zfeature_register(SPA_FEATURE_PROJECT_QUOTA, 563 "org.zfsonlinux:project_quota", "project_quota", 564 "space/object accounting based on project ID.", 565 ZFEATURE_FLAG_READONLY_COMPAT | ZFEATURE_FLAG_PER_DATASET, 566 ZFEATURE_TYPE_BOOLEAN, project_quota_deps); 567 } 568 569 zfeature_register(SPA_FEATURE_ALLOCATION_CLASSES, 570 "org.zfsonlinux:allocation_classes", "allocation_classes", 571 "Support for separate allocation classes.", 572 ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL); 573 574 zfeature_register(SPA_FEATURE_RESILVER_DEFER, 575 "com.datto:resilver_defer", "resilver_defer", 576 "Support for deferring new resilvers when one is already running.", 577 ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL); 578 579 zfeature_register(SPA_FEATURE_DEVICE_REBUILD, 580 "org.openzfs:device_rebuild", "device_rebuild", 581 "Support for sequential mirror/dRAID device rebuilds", 582 ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL); 583 584 { 585 static const spa_feature_t zstd_deps[] = { 586 SPA_FEATURE_EXTENSIBLE_DATASET, 587 SPA_FEATURE_NONE 588 }; 589 zfeature_register(SPA_FEATURE_ZSTD_COMPRESS, 590 "org.freebsd:zstd_compress", "zstd_compress", 591 "zstd compression algorithm support.", 592 ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN, zstd_deps); 593 } 594 595 zfeature_register(SPA_FEATURE_DRAID, 596 "org.openzfs:draid", "draid", "Support for distributed spare RAID", 597 ZFEATURE_FLAG_MOS, ZFEATURE_TYPE_BOOLEAN, NULL); 598 } 599 600 #if defined(_KERNEL) 601 EXPORT_SYMBOL(zfeature_lookup_guid); 602 EXPORT_SYMBOL(zfeature_lookup_name); 603 EXPORT_SYMBOL(zfeature_is_supported); 604 EXPORT_SYMBOL(zfeature_is_valid_guid); 605 EXPORT_SYMBOL(zfeature_depends_on); 606 EXPORT_SYMBOL(zpool_feature_init); 607 EXPORT_SYMBOL(spa_feature_table); 608 #endif 609