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4101 metaslab_debug should allow for fine-grained control
4102 space_maps should store more information about themselves
4103 space map object blocksize should be increased
4104 ::spa_space no longer works
4105 removing a mirrored log device results in a leaked object
4106 asynchronously load metaslab
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Sebastien Roy <seb@delphix.com>
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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 *
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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 - * Copyright (c) 2012 by Delphix. All rights reserved.
23 + * Copyright (c) 2013 by Delphix. All rights reserved.
24 24 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
25 25 * Copyright (c) 2013, Joyent, Inc. All rights reserved.
26 26 */
27 27
28 28 #ifdef _KERNEL
29 29 #include <sys/systm.h>
30 30 #else
31 31 #include <errno.h>
32 32 #include <string.h>
33 33 #endif
34 34 #include <sys/debug.h>
35 35 #include <sys/fs/zfs.h>
36 36 #include <sys/inttypes.h>
37 37 #include <sys/types.h>
38 38 #include "zfeature_common.h"
39 39
40 40 /*
41 41 * Set to disable all feature checks while opening pools, allowing pools with
42 42 * unsupported features to be opened. Set for testing only.
43 43 */
44 44 boolean_t zfeature_checks_disable = B_FALSE;
45 45
46 46 zfeature_info_t spa_feature_table[SPA_FEATURES];
47 47
48 48 /*
49 49 * Valid characters for feature guids. This list is mainly for aesthetic
50 50 * purposes and could be expanded in the future. There are different allowed
51 51 * characters in the guids reverse dns portion (before the colon) and its
52 52 * short name (after the colon).
53 53 */
54 54 static int
55 55 valid_char(char c, boolean_t after_colon)
56 56 {
57 57 return ((c >= 'a' && c <= 'z') ||
58 58 (c >= '0' && c <= '9') ||
59 59 c == (after_colon ? '_' : '.'));
60 60 }
61 61
62 62 /*
63 63 * Every feature guid must contain exactly one colon which separates a reverse
64 64 * dns organization name from the feature's "short" name (e.g.
65 65 * "com.company:feature_name").
66 66 */
67 67 boolean_t
68 68 zfeature_is_valid_guid(const char *name)
69 69 {
70 70 int i;
71 71 boolean_t has_colon = B_FALSE;
72 72
73 73 i = 0;
74 74 while (name[i] != '\0') {
75 75 char c = name[i++];
76 76 if (c == ':') {
77 77 if (has_colon)
78 78 return (B_FALSE);
79 79 has_colon = B_TRUE;
80 80 continue;
81 81 }
82 82 if (!valid_char(c, has_colon))
83 83 return (B_FALSE);
84 84 }
85 85
86 86 return (has_colon);
87 87 }
88 88
89 89 boolean_t
90 90 zfeature_is_supported(const char *guid)
91 91 {
92 92 if (zfeature_checks_disable)
93 93 return (B_TRUE);
94 94
95 95 return (0 == zfeature_lookup_guid(guid, NULL));
96 96 }
97 97
98 98 int
99 99 zfeature_lookup_guid(const char *guid, zfeature_info_t **res)
100 100 {
101 101 for (int i = 0; i < SPA_FEATURES; i++) {
102 102 zfeature_info_t *feature = &spa_feature_table[i];
103 103 if (strcmp(guid, feature->fi_guid) == 0) {
104 104 if (res != NULL)
105 105 *res = feature;
106 106 return (0);
107 107 }
108 108 }
109 109
110 110 return (ENOENT);
111 111 }
112 112
113 113 int
114 114 zfeature_lookup_name(const char *name, zfeature_info_t **res)
115 115 {
116 116 for (int i = 0; i < SPA_FEATURES; i++) {
117 117 zfeature_info_t *feature = &spa_feature_table[i];
118 118 if (strcmp(name, feature->fi_uname) == 0) {
119 119 if (res != NULL)
120 120 *res = feature;
121 121 return (0);
122 122 }
123 123 }
124 124
125 125 return (ENOENT);
126 126 }
127 127
128 128 static void
129 129 zfeature_register(int fid, const char *guid, const char *name, const char *desc,
130 130 boolean_t readonly, boolean_t mos, zfeature_info_t **deps)
131 131 {
132 132 zfeature_info_t *feature = &spa_feature_table[fid];
133 133 static zfeature_info_t *nodeps[] = { NULL };
134 134
135 135 ASSERT(name != NULL);
136 136 ASSERT(desc != NULL);
137 137 ASSERT(!readonly || !mos);
138 138 ASSERT3U(fid, <, SPA_FEATURES);
139 139 ASSERT(zfeature_is_valid_guid(guid));
140 140
141 141 if (deps == NULL)
142 142 deps = nodeps;
143 143
144 144 feature->fi_guid = guid;
145 145 feature->fi_uname = name;
146 146 feature->fi_desc = desc;
147 147 feature->fi_can_readonly = readonly;
148 148 feature->fi_mos = mos;
149 149 feature->fi_depends = deps;
150 150 }
151 151
152 152 void
153 153 zpool_feature_init(void)
154 154 {
155 155 zfeature_register(SPA_FEATURE_ASYNC_DESTROY,
156 156 "com.delphix:async_destroy", "async_destroy",
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157 157 "Destroy filesystems asynchronously.", B_TRUE, B_FALSE, NULL);
158 158 zfeature_register(SPA_FEATURE_EMPTY_BPOBJ,
159 159 "com.delphix:empty_bpobj", "empty_bpobj",
160 160 "Snapshots use less space.", B_TRUE, B_FALSE, NULL);
161 161 zfeature_register(SPA_FEATURE_LZ4_COMPRESS,
162 162 "org.illumos:lz4_compress", "lz4_compress",
163 163 "LZ4 compression algorithm support.", B_FALSE, B_FALSE, NULL);
164 164 zfeature_register(SPA_FEATURE_MULTI_VDEV_CRASH_DUMP,
165 165 "com.joyent:multi_vdev_crash_dump", "multi_vdev_crash_dump",
166 166 "Crash dumps to multiple vdev pools.", B_FALSE, B_FALSE, NULL);
167 + zfeature_register(SPA_FEATURE_SPACEMAP_HISTOGRAM,
168 + "com.delphix:spacemap_histogram", "spacemap_histogram",
169 + "Spacemaps maintain space histograms.", B_TRUE, B_FALSE, NULL);
167 170 }
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