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 https://opensource.org/licenses/CDDL-1.0.
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 */
51boolean_t zfeature_checks_disable = B_FALSE;
52
53zfeature_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 */
61static int
62valid_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 */
75boolean_t
76zfeature_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
97boolean_t
98zfeature_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
113int
114zfeature_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
130int
131zfeature_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
147boolean_t
148zfeature_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
159static boolean_t
160deps_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)
170struct zfs_mod_supported_features {
171	void *tree;
172	boolean_t all_features;
173};
174
175struct zfs_mod_supported_features *
176zfs_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
225end:
226	closedir(sysfs_dir);
227	return (ret);
228
229nomem:
230	zfs_mod_list_supported_free(ret);
231	ret = NULL;
232	goto end;
233#endif
234}
235
236void
237zfs_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)
250static boolean_t
251zfs_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
262boolean_t
263zfs_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
298static boolean_t
299zfs_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
321static void
322zfeature_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 */
367void
368zpool_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	zfeature_register(SPA_FEATURE_HEAD_ERRLOG,
711	    "com.delphix:head_errlog", "head_errlog",
712	    "Support for per-dataset on-disk error logs.",
713	    ZFEATURE_FLAG_ACTIVATE_ON_ENABLE, ZFEATURE_TYPE_BOOLEAN, NULL,
714	    sfeatures);
715
716	{
717		static const spa_feature_t blake3_deps[] = {
718			SPA_FEATURE_EXTENSIBLE_DATASET,
719			SPA_FEATURE_NONE
720		};
721		zfeature_register(SPA_FEATURE_BLAKE3,
722		    "org.openzfs:blake3", "blake3",
723		    "BLAKE3 hash algorithm.",
724		    ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
725		    blake3_deps, sfeatures);
726	}
727
728	zfeature_register(SPA_FEATURE_BLOCK_CLONING,
729	    "com.fudosecurity:block_cloning", "block_cloning",
730	    "Support for block cloning via Block Reference Table.",
731	    ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL,
732	    sfeatures);
733
734	zfeature_register(SPA_FEATURE_AVZ_V2,
735	    "com.klarasystems:vdev_zaps_v2", "vdev_zaps_v2",
736	    "Support for root vdev ZAP.",
737	    ZFEATURE_FLAG_MOS, ZFEATURE_TYPE_BOOLEAN, NULL,
738	    sfeatures);
739
740	{
741		static const spa_feature_t redact_list_spill_deps[] = {
742			SPA_FEATURE_REDACTION_BOOKMARKS,
743			SPA_FEATURE_NONE
744		};
745		zfeature_register(SPA_FEATURE_REDACTION_LIST_SPILL,
746		    "com.delphix:redaction_list_spill", "redaction_list_spill",
747		    "Support for increased number of redaction_snapshot "
748		    "arguments in zfs redact.", 0, ZFEATURE_TYPE_BOOLEAN,
749		    redact_list_spill_deps, sfeatures);
750	}
751
752	zfeature_register(SPA_FEATURE_RAIDZ_EXPANSION,
753	    "org.openzfs:raidz_expansion", "raidz_expansion",
754	    "Support for raidz expansion",
755	    ZFEATURE_FLAG_MOS, ZFEATURE_TYPE_BOOLEAN, NULL, sfeatures);
756
757	zfs_mod_list_supported_free(sfeatures);
758}
759
760#if defined(_KERNEL)
761EXPORT_SYMBOL(zfeature_lookup_guid);
762EXPORT_SYMBOL(zfeature_lookup_name);
763EXPORT_SYMBOL(zfeature_is_supported);
764EXPORT_SYMBOL(zfeature_is_valid_guid);
765EXPORT_SYMBOL(zfeature_depends_on);
766EXPORT_SYMBOL(zpool_feature_init);
767EXPORT_SYMBOL(spa_feature_table);
768#endif
769