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) 2013, Joyent, Inc. All rights reserved.
26 * Copyright (c) 2014, Nexenta Systems, Inc. All rights reserved.
30 #include <sys/systm.h>
35 #include <sys/debug.h>
36 #include <sys/fs/zfs.h>
37 #include <sys/inttypes.h>
38 #include <sys/types.h>
39 #include "zfeature_common.h"
42 * Set to disable all feature checks while opening pools, allowing pools with
43 * unsupported features to be opened. Set for testing only.
45 boolean_t zfeature_checks_disable
= B_FALSE
;
47 zfeature_info_t spa_feature_table
[SPA_FEATURES
];
50 * Valid characters for feature guids. This list is mainly for aesthetic
51 * purposes and could be expanded in the future. There are different allowed
52 * characters in the guids reverse dns portion (before the colon) and its
53 * short name (after the colon).
56 valid_char(char c
, boolean_t after_colon
)
58 return ((c
>= 'a' && c
<= 'z') ||
59 (c
>= '0' && c
<= '9') ||
60 (after_colon
&& c
== '_') ||
61 (!after_colon
&& (c
== '.' || c
== '-')));
65 * Every feature guid must contain exactly one colon which separates a reverse
66 * dns organization name from the feature's "short" name (e.g.
67 * "com.company:feature_name").
70 zfeature_is_valid_guid(const char *name
)
73 boolean_t has_colon
= B_FALSE
;
76 while (name
[i
] != '\0') {
84 if (!valid_char(c
, has_colon
))
92 zfeature_is_supported(const char *guid
)
94 if (zfeature_checks_disable
)
97 for (spa_feature_t i
= 0; i
< SPA_FEATURES
; i
++) {
98 zfeature_info_t
*feature
= &spa_feature_table
[i
];
99 if (strcmp(guid
, feature
->fi_guid
) == 0)
106 zfeature_lookup_name(const char *name
, spa_feature_t
*res
)
108 for (spa_feature_t i
= 0; i
< SPA_FEATURES
; i
++) {
109 zfeature_info_t
*feature
= &spa_feature_table
[i
];
110 if (strcmp(name
, feature
->fi_uname
) == 0) {
121 zfeature_depends_on(spa_feature_t fid
, spa_feature_t check
) {
122 zfeature_info_t
*feature
= &spa_feature_table
[fid
];
124 for (int i
= 0; feature
->fi_depends
[i
] != SPA_FEATURE_NONE
; i
++) {
125 if (feature
->fi_depends
[i
] == check
)
132 zfeature_register(spa_feature_t fid
, const char *guid
, const char *name
,
133 const char *desc
, zfeature_flags_t flags
, const spa_feature_t
*deps
)
135 zfeature_info_t
*feature
= &spa_feature_table
[fid
];
136 static spa_feature_t nodeps
[] = { SPA_FEATURE_NONE
};
138 ASSERT(name
!= NULL
);
139 ASSERT(desc
!= NULL
);
140 ASSERT((flags
& ZFEATURE_FLAG_READONLY_COMPAT
) == 0 ||
141 (flags
& ZFEATURE_FLAG_MOS
) == 0);
142 ASSERT3U(fid
, <, SPA_FEATURES
);
143 ASSERT(zfeature_is_valid_guid(guid
));
148 feature
->fi_feature
= fid
;
149 feature
->fi_guid
= guid
;
150 feature
->fi_uname
= name
;
151 feature
->fi_desc
= desc
;
152 feature
->fi_flags
= flags
;
153 feature
->fi_depends
= deps
;
157 zpool_feature_init(void)
159 zfeature_register(SPA_FEATURE_ASYNC_DESTROY
,
160 "com.delphix:async_destroy", "async_destroy",
161 "Destroy filesystems asynchronously.",
162 ZFEATURE_FLAG_READONLY_COMPAT
, NULL
);
164 zfeature_register(SPA_FEATURE_EMPTY_BPOBJ
,
165 "com.delphix:empty_bpobj", "empty_bpobj",
166 "Snapshots use less space.",
167 ZFEATURE_FLAG_READONLY_COMPAT
, NULL
);
169 zfeature_register(SPA_FEATURE_LZ4_COMPRESS
,
170 "org.illumos:lz4_compress", "lz4_compress",
171 "LZ4 compression algorithm support.",
172 ZFEATURE_FLAG_ACTIVATE_ON_ENABLE
, NULL
);
174 zfeature_register(SPA_FEATURE_MULTI_VDEV_CRASH_DUMP
,
175 "com.joyent:multi_vdev_crash_dump", "multi_vdev_crash_dump",
176 "Crash dumps to multiple vdev pools.",
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
);
189 static spa_feature_t hole_birth_deps
[] = { SPA_FEATURE_ENABLED_TXG
,
191 zfeature_register(SPA_FEATURE_HOLE_BIRTH
,
192 "com.delphix:hole_birth", "hole_birth",
193 "Retain hole birth txg for more precise zfs send",
194 ZFEATURE_FLAG_MOS
| ZFEATURE_FLAG_ACTIVATE_ON_ENABLE
,
197 zfeature_register(SPA_FEATURE_EXTENSIBLE_DATASET
,
198 "com.delphix:extensible_dataset", "extensible_dataset",
199 "Enhanced dataset functionality, used by other features.",
202 static const spa_feature_t bookmarks_deps
[] = {
203 SPA_FEATURE_EXTENSIBLE_DATASET
,
206 zfeature_register(SPA_FEATURE_BOOKMARKS
,
207 "com.delphix:bookmarks", "bookmarks",
208 "\"zfs bookmark\" command",
209 ZFEATURE_FLAG_READONLY_COMPAT
, bookmarks_deps
);
211 static const spa_feature_t filesystem_limits_deps
[] = {
212 SPA_FEATURE_EXTENSIBLE_DATASET
,
215 zfeature_register(SPA_FEATURE_FS_SS_LIMIT
,
216 "com.joyent:filesystem_limits", "filesystem_limits",
217 "Filesystem and snapshot limits.",
218 ZFEATURE_FLAG_READONLY_COMPAT
, filesystem_limits_deps
);
220 zfeature_register(SPA_FEATURE_EMBEDDED_DATA
,
221 "com.delphix:embedded_data", "embedded_data",
222 "Blocks which compress very well use even less space.",
223 ZFEATURE_FLAG_MOS
| ZFEATURE_FLAG_ACTIVATE_ON_ENABLE
,
226 static const spa_feature_t large_blocks_deps
[] = {
227 SPA_FEATURE_EXTENSIBLE_DATASET
,
230 zfeature_register(SPA_FEATURE_LARGE_BLOCKS
,
231 "org.open-zfs:large_blocks", "large_blocks",
232 "Support for blocks larger than 128KB.",
233 ZFEATURE_FLAG_PER_DATASET
, large_blocks_deps
);
235 zfeature_register(SPA_FEATURE_SHA512
,
236 "org.illumos:sha512", "sha512",
237 "SHA-512/256 hash algorithm.",
238 ZFEATURE_FLAG_PER_DATASET
, NULL
);
239 zfeature_register(SPA_FEATURE_SKEIN
,
240 "org.illumos:skein", "skein",
241 "Skein hash algorithm.",
242 ZFEATURE_FLAG_PER_DATASET
, NULL
);
243 zfeature_register(SPA_FEATURE_EDONR
,
244 "org.illumos:edonr", "edonr",
245 "Edon-R hash algorithm.",
246 ZFEATURE_FLAG_PER_DATASET
, NULL
);