26 */
27
28#ifdef _KERNEL
29#include <sys/systm.h>
30#else
31#include <errno.h>
32#include <string.h>
33#endif
34#include <sys/debug.h>
35#include <sys/fs/zfs.h>
36#include <sys/types.h>
37#include "zfeature_common.h"
38
39/*
40 * Set to disable all feature checks while opening pools, allowing pools with
41 * unsupported features to be opened. Set for testing only.
42 */
43boolean_t zfeature_checks_disable = B_FALSE;
44
45zfeature_info_t spa_feature_table[SPA_FEATURES];
46
47/*
48 * Valid characters for feature guids. This list is mainly for aesthetic
49 * purposes and could be expanded in the future. There are different allowed
50 * characters in the guids reverse dns portion (before the colon) and its
51 * short name (after the colon).
52 */
53static int
54valid_char(char c, boolean_t after_colon)
55{
56 return ((c >= 'a' && c <= 'z') ||
57 (c >= '0' && c <= '9') ||
58 c == (after_colon ? '_' : '.'));
59}
60
61/*
62 * Every feature guid must contain exactly one colon which separates a reverse
63 * dns organization name from the feature's "short" name (e.g.
64 * "com.company:feature_name").
65 */
66boolean_t
67zfeature_is_valid_guid(const char *name)
68{
69 int i;
70 boolean_t has_colon = B_FALSE;
71
72 i = 0;
73 while (name[i] != '\0') {
74 char c = name[i++];
75 if (c == ':') {
76 if (has_colon)
77 return (B_FALSE);
78 has_colon = B_TRUE;
79 continue;
80 }
81 if (!valid_char(c, has_colon))
82 return (B_FALSE);
83 }
84
85 return (has_colon);
86}
87
88boolean_t
89zfeature_is_supported(const char *guid)
90{
91 if (zfeature_checks_disable)
92 return (B_TRUE);
93
94 for (spa_feature_t i = 0; i < SPA_FEATURES; i++) {
95 zfeature_info_t *feature = &spa_feature_table[i];
96 if (strcmp(guid, feature->fi_guid) == 0)
97 return (B_TRUE);
98 }
99 return (B_FALSE);
100}
101
102int
103zfeature_lookup_name(const char *name, spa_feature_t *res)
104{
105 for (spa_feature_t i = 0; i < SPA_FEATURES; i++) {
106 zfeature_info_t *feature = &spa_feature_table[i];
107 if (strcmp(name, feature->fi_uname) == 0) {
108 if (res != NULL)
109 *res = i;
110 return (0);
111 }
112 }
113
114 return (ENOENT);
115}
116
117boolean_t
118zfeature_depends_on(spa_feature_t fid, spa_feature_t check) {
119 zfeature_info_t *feature = &spa_feature_table[fid];
120
121 for (int i = 0; feature->fi_depends[i] != SPA_FEATURE_NONE; i++) {
122 if (feature->fi_depends[i] == check)
123 return (B_TRUE);
124 }
125 return (B_FALSE);
126}
127
128static void
129zfeature_register(spa_feature_t fid, const char *guid, const char *name,
130 const char *desc, boolean_t readonly, boolean_t mos,
131 boolean_t activate_on_enable, const spa_feature_t *deps)
132{
133 zfeature_info_t *feature = &spa_feature_table[fid];
134 static spa_feature_t nodeps[] = { SPA_FEATURE_NONE };
135
136 ASSERT(name != NULL);
137 ASSERT(desc != NULL);
138 ASSERT(!readonly || !mos);
139 ASSERT3U(fid, <, SPA_FEATURES);
140 ASSERT(zfeature_is_valid_guid(guid));
141
142 if (deps == NULL)
143 deps = nodeps;
144
145 feature->fi_feature = fid;
146 feature->fi_guid = guid;
147 feature->fi_uname = name;
148 feature->fi_desc = desc;
149 feature->fi_can_readonly = readonly;
150 feature->fi_mos = mos;
151 feature->fi_activate_on_enable = activate_on_enable;
152 feature->fi_depends = deps;
153}
154
155void
156zpool_feature_init(void)
157{
158 zfeature_register(SPA_FEATURE_ASYNC_DESTROY,
159 "com.delphix:async_destroy", "async_destroy",
160 "Destroy filesystems asynchronously.", B_TRUE, B_FALSE,
161 B_FALSE, NULL);
162
163 zfeature_register(SPA_FEATURE_EMPTY_BPOBJ,
164 "com.delphix:empty_bpobj", "empty_bpobj",
165 "Snapshots use less space.", B_TRUE, B_FALSE,
166 B_FALSE, NULL);
167
168 zfeature_register(SPA_FEATURE_LZ4_COMPRESS,
169 "org.illumos:lz4_compress", "lz4_compress",
170 "LZ4 compression algorithm support.", B_FALSE, B_FALSE,
| 27 */
28
29#ifdef _KERNEL
30#include <sys/systm.h>
31#else
32#include <errno.h>
33#include <string.h>
34#endif
35#include <sys/debug.h>
36#include <sys/fs/zfs.h>
37#include <sys/types.h>
38#include "zfeature_common.h"
39
40/*
41 * Set to disable all feature checks while opening pools, allowing pools with
42 * unsupported features to be opened. Set for testing only.
43 */
44boolean_t zfeature_checks_disable = B_FALSE;
45
46zfeature_info_t spa_feature_table[SPA_FEATURES];
47
48/*
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).
53 */
54static int
55valid_char(char c, boolean_t after_colon)
56{
57 return ((c >= 'a' && c <= 'z') ||
58 (c >= '0' && c <= '9') ||
59 c == (after_colon ? '_' : '.'));
60}
61
62/*
63 * Every feature guid must contain exactly one colon which separates a reverse
64 * dns organization name from the feature's "short" name (e.g.
65 * "com.company:feature_name").
66 */
67boolean_t
68zfeature_is_valid_guid(const char *name)
69{
70 int i;
71 boolean_t has_colon = B_FALSE;
72
73 i = 0;
74 while (name[i] != '\0') {
75 char c = name[i++];
76 if (c == ':') {
77 if (has_colon)
78 return (B_FALSE);
79 has_colon = B_TRUE;
80 continue;
81 }
82 if (!valid_char(c, has_colon))
83 return (B_FALSE);
84 }
85
86 return (has_colon);
87}
88
89boolean_t
90zfeature_is_supported(const char *guid)
91{
92 if (zfeature_checks_disable)
93 return (B_TRUE);
94
95 for (spa_feature_t i = 0; i < SPA_FEATURES; i++) {
96 zfeature_info_t *feature = &spa_feature_table[i];
97 if (strcmp(guid, feature->fi_guid) == 0)
98 return (B_TRUE);
99 }
100 return (B_FALSE);
101}
102
103int
104zfeature_lookup_name(const char *name, spa_feature_t *res)
105{
106 for (spa_feature_t i = 0; i < SPA_FEATURES; i++) {
107 zfeature_info_t *feature = &spa_feature_table[i];
108 if (strcmp(name, feature->fi_uname) == 0) {
109 if (res != NULL)
110 *res = i;
111 return (0);
112 }
113 }
114
115 return (ENOENT);
116}
117
118boolean_t
119zfeature_depends_on(spa_feature_t fid, spa_feature_t check) {
120 zfeature_info_t *feature = &spa_feature_table[fid];
121
122 for (int i = 0; feature->fi_depends[i] != SPA_FEATURE_NONE; i++) {
123 if (feature->fi_depends[i] == check)
124 return (B_TRUE);
125 }
126 return (B_FALSE);
127}
128
129static void
130zfeature_register(spa_feature_t fid, const char *guid, const char *name,
131 const char *desc, boolean_t readonly, boolean_t mos,
132 boolean_t activate_on_enable, const spa_feature_t *deps)
133{
134 zfeature_info_t *feature = &spa_feature_table[fid];
135 static spa_feature_t nodeps[] = { SPA_FEATURE_NONE };
136
137 ASSERT(name != NULL);
138 ASSERT(desc != NULL);
139 ASSERT(!readonly || !mos);
140 ASSERT3U(fid, <, SPA_FEATURES);
141 ASSERT(zfeature_is_valid_guid(guid));
142
143 if (deps == NULL)
144 deps = nodeps;
145
146 feature->fi_feature = fid;
147 feature->fi_guid = guid;
148 feature->fi_uname = name;
149 feature->fi_desc = desc;
150 feature->fi_can_readonly = readonly;
151 feature->fi_mos = mos;
152 feature->fi_activate_on_enable = activate_on_enable;
153 feature->fi_depends = deps;
154}
155
156void
157zpool_feature_init(void)
158{
159 zfeature_register(SPA_FEATURE_ASYNC_DESTROY,
160 "com.delphix:async_destroy", "async_destroy",
161 "Destroy filesystems asynchronously.", B_TRUE, B_FALSE,
162 B_FALSE, NULL);
163
164 zfeature_register(SPA_FEATURE_EMPTY_BPOBJ,
165 "com.delphix:empty_bpobj", "empty_bpobj",
166 "Snapshots use less space.", B_TRUE, B_FALSE,
167 B_FALSE, NULL);
168
169 zfeature_register(SPA_FEATURE_LZ4_COMPRESS,
170 "org.illumos:lz4_compress", "lz4_compress",
171 "LZ4 compression algorithm support.", B_FALSE, B_FALSE,
|
172
173 zfeature_register(SPA_FEATURE_MULTI_VDEV_CRASH_DUMP,
174 "com.joyent:multi_vdev_crash_dump", "multi_vdev_crash_dump",
175 "Crash dumps to multiple vdev pools.", B_FALSE, B_FALSE,
176 B_FALSE, NULL);
177
178 zfeature_register(SPA_FEATURE_SPACEMAP_HISTOGRAM,
179 "com.delphix:spacemap_histogram", "spacemap_histogram",
180 "Spacemaps maintain space histograms.", B_TRUE, B_FALSE,
181 B_FALSE, NULL);
182
183 zfeature_register(SPA_FEATURE_ENABLED_TXG,
184 "com.delphix:enabled_txg", "enabled_txg",
185 "Record txg at which a feature is enabled", B_TRUE, B_FALSE,
186 B_FALSE, NULL);
187
188 static spa_feature_t hole_birth_deps[] = { SPA_FEATURE_ENABLED_TXG,
189 SPA_FEATURE_NONE };
190 zfeature_register(SPA_FEATURE_HOLE_BIRTH,
191 "com.delphix:hole_birth", "hole_birth",
192 "Retain hole birth txg for more precise zfs send",
193 B_FALSE, B_TRUE, B_TRUE, hole_birth_deps);
194
195 zfeature_register(SPA_FEATURE_EXTENSIBLE_DATASET,
196 "com.delphix:extensible_dataset", "extensible_dataset",
197 "Enhanced dataset functionality, used by other features.",
198 B_FALSE, B_FALSE, B_FALSE, NULL);
199
200 static const spa_feature_t bookmarks_deps[] = {
201 SPA_FEATURE_EXTENSIBLE_DATASET,
202 SPA_FEATURE_NONE
203 };
204 zfeature_register(SPA_FEATURE_BOOKMARKS,
205 "com.delphix:bookmarks", "bookmarks",
206 "\"zfs bookmark\" command",
207 B_TRUE, B_FALSE, B_FALSE, bookmarks_deps);
208
209 static const spa_feature_t filesystem_limits_deps[] = {
210 SPA_FEATURE_EXTENSIBLE_DATASET,
211 SPA_FEATURE_NONE
212 };
213 zfeature_register(SPA_FEATURE_FS_SS_LIMIT,
214 "com.joyent:filesystem_limits", "filesystem_limits",
215 "Filesystem and snapshot limits.", B_TRUE, B_FALSE, B_FALSE,
216 filesystem_limits_deps);
217
218 zfeature_register(SPA_FEATURE_EMBEDDED_DATA,
219 "com.delphix:embedded_data", "embedded_data",
220 "Blocks which compress very well use even less space.",
221 B_FALSE, B_TRUE, B_TRUE, NULL);
222}
| 173
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.", B_FALSE, B_FALSE,
177 B_FALSE, NULL);
178
179 zfeature_register(SPA_FEATURE_SPACEMAP_HISTOGRAM,
180 "com.delphix:spacemap_histogram", "spacemap_histogram",
181 "Spacemaps maintain space histograms.", B_TRUE, B_FALSE,
182 B_FALSE, NULL);
183
184 zfeature_register(SPA_FEATURE_ENABLED_TXG,
185 "com.delphix:enabled_txg", "enabled_txg",
186 "Record txg at which a feature is enabled", B_TRUE, B_FALSE,
187 B_FALSE, NULL);
188
189 static spa_feature_t hole_birth_deps[] = { SPA_FEATURE_ENABLED_TXG,
190 SPA_FEATURE_NONE };
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 B_FALSE, B_TRUE, B_TRUE, hole_birth_deps);
195
196 zfeature_register(SPA_FEATURE_EXTENSIBLE_DATASET,
197 "com.delphix:extensible_dataset", "extensible_dataset",
198 "Enhanced dataset functionality, used by other features.",
199 B_FALSE, B_FALSE, B_FALSE, NULL);
200
201 static const spa_feature_t bookmarks_deps[] = {
202 SPA_FEATURE_EXTENSIBLE_DATASET,
203 SPA_FEATURE_NONE
204 };
205 zfeature_register(SPA_FEATURE_BOOKMARKS,
206 "com.delphix:bookmarks", "bookmarks",
207 "\"zfs bookmark\" command",
208 B_TRUE, B_FALSE, B_FALSE, bookmarks_deps);
209
210 static const spa_feature_t filesystem_limits_deps[] = {
211 SPA_FEATURE_EXTENSIBLE_DATASET,
212 SPA_FEATURE_NONE
213 };
214 zfeature_register(SPA_FEATURE_FS_SS_LIMIT,
215 "com.joyent:filesystem_limits", "filesystem_limits",
216 "Filesystem and snapshot limits.", B_TRUE, B_FALSE, B_FALSE,
217 filesystem_limits_deps);
218
219 zfeature_register(SPA_FEATURE_EMBEDDED_DATA,
220 "com.delphix:embedded_data", "embedded_data",
221 "Blocks which compress very well use even less space.",
222 B_FALSE, B_TRUE, B_TRUE, NULL);
223}
|