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Integrated Edon-R hash function.
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--- old/usr/src/common/zfs/zfeature_common.c
+++ new/usr/src/common/zfs/zfeature_common.c
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21
22 22 /*
23 23 * Copyright (c) 2012 by Delphix. All rights reserved.
24 24 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
25 25 */
26 26
27 27 #ifdef _KERNEL
28 28 #include <sys/systm.h>
29 29 #else
30 30 #include <errno.h>
31 31 #include <string.h>
32 32 #endif
33 33 #include <sys/debug.h>
34 34 #include <sys/fs/zfs.h>
35 35 #include <sys/inttypes.h>
36 36 #include <sys/types.h>
37 37 #include "zfeature_common.h"
38 38
39 39 /*
40 40 * Set to disable all feature checks while opening pools, allowing pools with
41 41 * unsupported features to be opened. Set for testing only.
42 42 */
43 43 boolean_t zfeature_checks_disable = B_FALSE;
44 44
45 45 zfeature_info_t spa_feature_table[SPA_FEATURES];
46 46
47 47 /*
48 48 * Valid characters for feature guids. This list is mainly for aesthetic
49 49 * purposes and could be expanded in the future. There are different allowed
50 50 * characters in the guids reverse dns portion (before the colon) and its
51 51 * short name (after the colon).
52 52 */
53 53 static int
54 54 valid_char(char c, boolean_t after_colon)
55 55 {
56 56 return ((c >= 'a' && c <= 'z') ||
57 57 (c >= '0' && c <= '9') ||
58 58 c == (after_colon ? '_' : '.'));
59 59 }
60 60
61 61 /*
62 62 * Every feature guid must contain exactly one colon which separates a reverse
63 63 * dns organization name from the feature's "short" name (e.g.
64 64 * "com.company:feature_name").
65 65 */
66 66 boolean_t
67 67 zfeature_is_valid_guid(const char *name)
68 68 {
69 69 int i;
70 70 boolean_t has_colon = B_FALSE;
71 71
72 72 i = 0;
73 73 while (name[i] != '\0') {
74 74 char c = name[i++];
75 75 if (c == ':') {
76 76 if (has_colon)
77 77 return (B_FALSE);
78 78 has_colon = B_TRUE;
79 79 continue;
80 80 }
81 81 if (!valid_char(c, has_colon))
82 82 return (B_FALSE);
83 83 }
84 84
85 85 return (has_colon);
86 86 }
87 87
88 88 boolean_t
89 89 zfeature_is_supported(const char *guid)
90 90 {
91 91 if (zfeature_checks_disable)
92 92 return (B_TRUE);
93 93
94 94 return (0 == zfeature_lookup_guid(guid, NULL));
95 95 }
96 96
97 97 int
98 98 zfeature_lookup_guid(const char *guid, zfeature_info_t **res)
99 99 {
100 100 for (int i = 0; i < SPA_FEATURES; i++) {
101 101 zfeature_info_t *feature = &spa_feature_table[i];
102 102 if (strcmp(guid, feature->fi_guid) == 0) {
103 103 if (res != NULL)
104 104 *res = feature;
105 105 return (0);
106 106 }
107 107 }
108 108
109 109 return (ENOENT);
110 110 }
111 111
112 112 int
113 113 zfeature_lookup_name(const char *name, zfeature_info_t **res)
114 114 {
115 115 for (int i = 0; i < SPA_FEATURES; i++) {
116 116 zfeature_info_t *feature = &spa_feature_table[i];
117 117 if (strcmp(name, feature->fi_uname) == 0) {
118 118 if (res != NULL)
119 119 *res = feature;
120 120 return (0);
121 121 }
122 122 }
123 123
124 124 return (ENOENT);
125 125 }
126 126
127 127 static void
128 128 zfeature_register(int fid, const char *guid, const char *name, const char *desc,
129 129 boolean_t readonly, boolean_t mos, zfeature_info_t **deps)
130 130 {
131 131 zfeature_info_t *feature = &spa_feature_table[fid];
132 132 static zfeature_info_t *nodeps[] = { NULL };
133 133
134 134 ASSERT(name != NULL);
135 135 ASSERT(desc != NULL);
136 136 ASSERT(!readonly || !mos);
137 137 ASSERT3U(fid, <, SPA_FEATURES);
138 138 ASSERT(zfeature_is_valid_guid(guid));
139 139
140 140 if (deps == NULL)
141 141 deps = nodeps;
142 142
143 143 feature->fi_guid = guid;
144 144 feature->fi_uname = name;
145 145 feature->fi_desc = desc;
146 146 feature->fi_can_readonly = readonly;
147 147 feature->fi_mos = mos;
148 148 feature->fi_depends = deps;
149 149 }
150 150
151 151 void
152 152 zpool_feature_init(void)
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153 153 {
154 154 zfeature_register(SPA_FEATURE_ASYNC_DESTROY,
155 155 "com.delphix:async_destroy", "async_destroy",
156 156 "Destroy filesystems asynchronously.", B_TRUE, B_FALSE, NULL);
157 157 zfeature_register(SPA_FEATURE_EMPTY_BPOBJ,
158 158 "com.delphix:empty_bpobj", "empty_bpobj",
159 159 "Snapshots use less space.", B_TRUE, B_FALSE, NULL);
160 160 zfeature_register(SPA_FEATURE_LZ4_COMPRESS,
161 161 "org.illumos:lz4_compress", "lz4_compress",
162 162 "LZ4 compression algorithm support.", B_FALSE, B_FALSE, NULL);
163 + zfeature_register(SPA_FEATURE_EDONR_CKSUM,
164 + "org.illumos:edonr_cksum", "edonr_cksum",
165 + "Edon-R-512/256 checksum algorithm support.", B_FALSE, B_FALSE,
166 + NULL);
163 167 }
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