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
) {
126 zfeature_info_t
*feature
= &spa_feature_table
[fid
];
129 for (i
= 0; feature
->fi_depends
[i
] != SPA_FEATURE_NONE
; i
++) {
130 if (feature
->fi_depends
[i
] == check
)
137 zfeature_register(spa_feature_t fid
, const char *guid
, const char *name
,
138 const char *desc
, zfeature_flags_t flags
, const spa_feature_t
*deps
)
140 zfeature_info_t
*feature
= &spa_feature_table
[fid
];
141 static spa_feature_t nodeps
[] = { SPA_FEATURE_NONE
};
143 ASSERT(name
!= NULL
);
144 ASSERT(desc
!= NULL
);
145 ASSERT((flags
& ZFEATURE_FLAG_READONLY_COMPAT
) == 0 ||
146 (flags
& ZFEATURE_FLAG_MOS
) == 0);
147 ASSERT3U(fid
, <, SPA_FEATURES
);
148 ASSERT(zfeature_is_valid_guid(guid
));
153 feature
->fi_feature
= fid
;
154 feature
->fi_guid
= guid
;
155 feature
->fi_uname
= name
;
156 feature
->fi_desc
= desc
;
157 feature
->fi_flags
= flags
;
158 feature
->fi_depends
= deps
;
162 zpool_feature_init(void)
164 zfeature_register(SPA_FEATURE_ASYNC_DESTROY
,
165 "com.delphix:async_destroy", "async_destroy",
166 "Destroy filesystems asynchronously.",
167 ZFEATURE_FLAG_READONLY_COMPAT
, NULL
);
169 zfeature_register(SPA_FEATURE_EMPTY_BPOBJ
,
170 "com.delphix:empty_bpobj", "empty_bpobj",
171 "Snapshots use less space.",
172 ZFEATURE_FLAG_READONLY_COMPAT
, NULL
);
174 zfeature_register(SPA_FEATURE_LZ4_COMPRESS
,
175 "org.illumos:lz4_compress", "lz4_compress",
176 "LZ4 compression algorithm support.",
177 ZFEATURE_FLAG_ACTIVATE_ON_ENABLE
, NULL
);
179 zfeature_register(SPA_FEATURE_SPACEMAP_HISTOGRAM
,
180 "com.delphix:spacemap_histogram", "spacemap_histogram",
181 "Spacemaps maintain space histograms.",
182 ZFEATURE_FLAG_READONLY_COMPAT
, NULL
);
184 zfeature_register(SPA_FEATURE_ENABLED_TXG
,
185 "com.delphix:enabled_txg", "enabled_txg",
186 "Record txg at which a feature is enabled",
187 ZFEATURE_FLAG_READONLY_COMPAT
, NULL
);
190 static const spa_feature_t hole_birth_deps
[] = {
191 SPA_FEATURE_ENABLED_TXG
,
194 zfeature_register(SPA_FEATURE_HOLE_BIRTH
,
195 "com.delphix:hole_birth", "hole_birth",
196 "Retain hole birth txg for more precise zfs send",
197 ZFEATURE_FLAG_MOS
| ZFEATURE_FLAG_ACTIVATE_ON_ENABLE
,
201 zfeature_register(SPA_FEATURE_EXTENSIBLE_DATASET
,
202 "com.delphix:extensible_dataset", "extensible_dataset",
203 "Enhanced dataset functionality, used by other features.",
207 static const spa_feature_t bookmarks_deps
[] = {
208 SPA_FEATURE_EXTENSIBLE_DATASET
,
212 zfeature_register(SPA_FEATURE_BOOKMARKS
,
213 "com.delphix:bookmarks", "bookmarks",
214 "\"zfs bookmark\" command",
215 ZFEATURE_FLAG_READONLY_COMPAT
, bookmarks_deps
);
219 static const spa_feature_t filesystem_limits_deps
[] = {
220 SPA_FEATURE_EXTENSIBLE_DATASET
,
223 zfeature_register(SPA_FEATURE_FS_SS_LIMIT
,
224 "com.joyent:filesystem_limits", "filesystem_limits",
225 "Filesystem and snapshot limits.",
226 ZFEATURE_FLAG_READONLY_COMPAT
, filesystem_limits_deps
);
229 zfeature_register(SPA_FEATURE_EMBEDDED_DATA
,
230 "com.delphix:embedded_data", "embedded_data",
231 "Blocks which compress very well use even less space.",
232 ZFEATURE_FLAG_MOS
| ZFEATURE_FLAG_ACTIVATE_ON_ENABLE
,
236 static const spa_feature_t large_blocks_deps
[] = {
237 SPA_FEATURE_EXTENSIBLE_DATASET
,
240 zfeature_register(SPA_FEATURE_LARGE_BLOCKS
,
241 "org.open-zfs:large_blocks", "large_blocks",
242 "Support for blocks larger than 128KB.",
243 ZFEATURE_FLAG_PER_DATASET
, large_blocks_deps
);
247 static const spa_feature_t large_dnode_deps
[] = {
248 SPA_FEATURE_EXTENSIBLE_DATASET
,
251 zfeature_register(SPA_FEATURE_LARGE_DNODE
,
252 "org.zfsonlinux:large_dnode", "large_dnode",
253 "Variable on-disk size of dnodes.",
254 ZFEATURE_FLAG_PER_DATASET
, large_dnode_deps
);
258 static const spa_feature_t sha512_deps
[] = {
259 SPA_FEATURE_EXTENSIBLE_DATASET
,
262 zfeature_register(SPA_FEATURE_SHA512
,
263 "org.illumos:sha512", "sha512",
264 "SHA-512/256 hash algorithm.",
265 ZFEATURE_FLAG_PER_DATASET
, sha512_deps
);
268 static const spa_feature_t skein_deps
[] = {
269 SPA_FEATURE_EXTENSIBLE_DATASET
,
272 zfeature_register(SPA_FEATURE_SKEIN
,
273 "org.illumos:skein", "skein",
274 "Skein hash algorithm.",
275 ZFEATURE_FLAG_PER_DATASET
, skein_deps
);
279 static const spa_feature_t edonr_deps
[] = {
280 SPA_FEATURE_EXTENSIBLE_DATASET
,
283 zfeature_register(SPA_FEATURE_EDONR
,
284 "org.illumos:edonr", "edonr",
285 "Edon-R hash algorithm.",
286 ZFEATURE_FLAG_PER_DATASET
, edonr_deps
);
289 static const spa_feature_t userobj_accounting_deps
[] = {
290 SPA_FEATURE_EXTENSIBLE_DATASET
,
293 zfeature_register(SPA_FEATURE_USEROBJ_ACCOUNTING
,
294 "org.zfsonlinux:userobj_accounting", "userobj_accounting",
295 "User/Group object accounting.",
296 ZFEATURE_FLAG_READONLY_COMPAT
| ZFEATURE_FLAG_PER_DATASET
,
297 userobj_accounting_deps
);