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.
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.
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]
23 * Copyright (c) 2011, 2015 by Delphix. All rights reserved.
24 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
25 * Copyright (c) 2014, Nexenta Systems, Inc. All rights reserved.
29 #include <sys/systm.h>
34 #include <sys/debug.h>
35 #include <sys/fs/zfs.h>
36 #include <sys/inttypes.h>
37 #include <sys/types.h>
38 #include "zfeature_common.h"
41 * Set to disable all feature checks while opening pools, allowing pools with
42 * unsupported features to be opened. Set for testing only.
44 boolean_t zfeature_checks_disable = B_FALSE;
46 zfeature_info_t spa_feature_table[SPA_FEATURES];
49 * Valid characters for feature guids. This list is mainly for aesthetic
50 * purposes and could be expanded in the future. There are different allowed
51 * characters in the guids reverse dns portion (before the colon) and its
52 * short name (after the colon).
55 valid_char(char c, boolean_t after_colon)
57 return ((c >= 'a' && c <= 'z') ||
58 (c >= '0' && c <= '9') ||
59 (after_colon && c == '_') ||
60 (!after_colon && (c == '.' || c == '-')));
64 * Every feature guid must contain exactly one colon which separates a reverse
65 * dns organization name from the feature's "short" name (e.g.
66 * "com.company:feature_name").
69 zfeature_is_valid_guid(const char *name)
72 boolean_t has_colon = B_FALSE;
75 while (name[i] != '\0') {
83 if (!valid_char(c, has_colon))
91 zfeature_is_supported(const char *guid)
95 if (zfeature_checks_disable)
98 for (i = 0; i < SPA_FEATURES; i++) {
99 zfeature_info_t *feature = &spa_feature_table[i];
100 if (strcmp(guid, feature->fi_guid) == 0)
108 zfeature_lookup_name(const char *name, spa_feature_t *res)
112 for (i = 0; i < SPA_FEATURES; i++) {
113 zfeature_info_t *feature = &spa_feature_table[i];
114 if (strcmp(name, feature->fi_uname) == 0) {
125 zfeature_depends_on(spa_feature_t fid, spa_feature_t check)
127 zfeature_info_t *feature = &spa_feature_table[fid];
130 for (i = 0; feature->fi_depends[i] != SPA_FEATURE_NONE; i++) {
131 if (feature->fi_depends[i] == check)
138 deps_contains_feature(const spa_feature_t *deps, const spa_feature_t feature)
142 for (i = 0; deps[i] != SPA_FEATURE_NONE; i++)
143 if (deps[i] == feature)
150 zfeature_register(spa_feature_t fid, const char *guid, const char *name,
151 const char *desc, zfeature_flags_t flags, const spa_feature_t *deps)
153 zfeature_info_t *feature = &spa_feature_table[fid];
154 static spa_feature_t nodeps[] = { SPA_FEATURE_NONE };
156 ASSERT(name != NULL);
157 ASSERT(desc != NULL);
158 ASSERT((flags & ZFEATURE_FLAG_READONLY_COMPAT) == 0 ||
159 (flags & ZFEATURE_FLAG_MOS) == 0);
160 ASSERT3U(fid, <, SPA_FEATURES);
161 ASSERT(zfeature_is_valid_guid(guid));
166 VERIFY(((flags & ZFEATURE_FLAG_PER_DATASET) == 0) ||
167 (deps_contains_feature(deps, SPA_FEATURE_EXTENSIBLE_DATASET)));
169 feature->fi_feature = fid;
170 feature->fi_guid = guid;
171 feature->fi_uname = name;
172 feature->fi_desc = desc;
173 feature->fi_flags = flags;
174 feature->fi_depends = deps;
178 zpool_feature_init(void)
180 zfeature_register(SPA_FEATURE_ASYNC_DESTROY,
181 "com.delphix:async_destroy", "async_destroy",
182 "Destroy filesystems asynchronously.",
183 ZFEATURE_FLAG_READONLY_COMPAT, NULL);
185 zfeature_register(SPA_FEATURE_EMPTY_BPOBJ,
186 "com.delphix:empty_bpobj", "empty_bpobj",
187 "Snapshots use less space.",
188 ZFEATURE_FLAG_READONLY_COMPAT, NULL);
190 zfeature_register(SPA_FEATURE_LZ4_COMPRESS,
191 "org.illumos:lz4_compress", "lz4_compress",
192 "LZ4 compression algorithm support.",
193 ZFEATURE_FLAG_ACTIVATE_ON_ENABLE, NULL);
195 zfeature_register(SPA_FEATURE_SPACEMAP_HISTOGRAM,
196 "com.delphix:spacemap_histogram", "spacemap_histogram",
197 "Spacemaps maintain space histograms.",
198 ZFEATURE_FLAG_READONLY_COMPAT, NULL);
200 zfeature_register(SPA_FEATURE_ENABLED_TXG,
201 "com.delphix:enabled_txg", "enabled_txg",
202 "Record txg at which a feature is enabled",
203 ZFEATURE_FLAG_READONLY_COMPAT, NULL);
206 static const spa_feature_t hole_birth_deps[] = {
207 SPA_FEATURE_ENABLED_TXG,
210 zfeature_register(SPA_FEATURE_HOLE_BIRTH,
211 "com.delphix:hole_birth", "hole_birth",
212 "Retain hole birth txg for more precise zfs send",
213 ZFEATURE_FLAG_MOS | ZFEATURE_FLAG_ACTIVATE_ON_ENABLE,
217 zfeature_register(SPA_FEATURE_EXTENSIBLE_DATASET,
218 "com.delphix:extensible_dataset", "extensible_dataset",
219 "Enhanced dataset functionality, used by other features.",
223 static const spa_feature_t bookmarks_deps[] = {
224 SPA_FEATURE_EXTENSIBLE_DATASET,
228 zfeature_register(SPA_FEATURE_BOOKMARKS,
229 "com.delphix:bookmarks", "bookmarks",
230 "\"zfs bookmark\" command",
231 ZFEATURE_FLAG_READONLY_COMPAT, bookmarks_deps);
235 static const spa_feature_t filesystem_limits_deps[] = {
236 SPA_FEATURE_EXTENSIBLE_DATASET,
239 zfeature_register(SPA_FEATURE_FS_SS_LIMIT,
240 "com.joyent:filesystem_limits", "filesystem_limits",
241 "Filesystem and snapshot limits.",
242 ZFEATURE_FLAG_READONLY_COMPAT, filesystem_limits_deps);
245 zfeature_register(SPA_FEATURE_EMBEDDED_DATA,
246 "com.delphix:embedded_data", "embedded_data",
247 "Blocks which compress very well use even less space.",
248 ZFEATURE_FLAG_MOS | ZFEATURE_FLAG_ACTIVATE_ON_ENABLE,
252 static const spa_feature_t large_blocks_deps[] = {
253 SPA_FEATURE_EXTENSIBLE_DATASET,
256 zfeature_register(SPA_FEATURE_LARGE_BLOCKS,
257 "org.open-zfs:large_blocks", "large_blocks",
258 "Support for blocks larger than 128KB.",
259 ZFEATURE_FLAG_PER_DATASET, large_blocks_deps);
263 static const spa_feature_t large_dnode_deps[] = {
264 SPA_FEATURE_EXTENSIBLE_DATASET,
267 zfeature_register(SPA_FEATURE_LARGE_DNODE,
268 "org.zfsonlinux:large_dnode", "large_dnode",
269 "Variable on-disk size of dnodes.",
270 ZFEATURE_FLAG_PER_DATASET, large_dnode_deps);
274 static const spa_feature_t sha512_deps[] = {
275 SPA_FEATURE_EXTENSIBLE_DATASET,
278 zfeature_register(SPA_FEATURE_SHA512,
279 "org.illumos:sha512", "sha512",
280 "SHA-512/256 hash algorithm.",
281 ZFEATURE_FLAG_PER_DATASET, sha512_deps);
284 static const spa_feature_t skein_deps[] = {
285 SPA_FEATURE_EXTENSIBLE_DATASET,
288 zfeature_register(SPA_FEATURE_SKEIN,
289 "org.illumos:skein", "skein",
290 "Skein hash algorithm.",
291 ZFEATURE_FLAG_PER_DATASET, skein_deps);
295 static const spa_feature_t edonr_deps[] = {
296 SPA_FEATURE_EXTENSIBLE_DATASET,
299 zfeature_register(SPA_FEATURE_EDONR,
300 "org.illumos:edonr", "edonr",
301 "Edon-R hash algorithm.",
302 ZFEATURE_FLAG_PER_DATASET, edonr_deps);
305 static const spa_feature_t userobj_accounting_deps[] = {
306 SPA_FEATURE_EXTENSIBLE_DATASET,
309 zfeature_register(SPA_FEATURE_USEROBJ_ACCOUNTING,
310 "org.zfsonlinux:userobj_accounting", "userobj_accounting",
311 "User/Group object accounting.",
312 ZFEATURE_FLAG_READONLY_COMPAT | ZFEATURE_FLAG_PER_DATASET,
313 userobj_accounting_deps);