1 /*
2 * CDDL HEADER START
3 *
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.
7 *
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.
12 *
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]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2012 by Delphix. All rights reserved.
24 */
25
26 /*
27 * This file is intended for functions that ought to be common between user
28 * land (libzfs) and the kernel. When many common routines need to be shared
29 * then a separate file should to be created.
30 */
31
32 #if defined(_KERNEL)
33 #include <sys/systm.h>
34 #else
35 #include <string.h>
36 #endif
37
38 #include <sys/types.h>
39 #include <sys/fs/zfs.h>
40 #include <sys/int_limits.h>
41 #include <sys/nvpair.h>
42 #include "zfs_comutil.h"
43
44 /*
45 * Are there allocatable vdevs?
46 * Any pool must have at least one normal (metaslab) class vdev, which means:
47 * at least one that is simultaneously non-slog and non-special
48 */
49 boolean_t
50 zfs_allocatable_devs(nvlist_t *nv)
51 {
52 uint64_t is_log, is_special;
53 uint_t c;
54 nvlist_t **child;
55 uint_t children;
56
57 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
58 &child, &children) != 0) {
59 return (B_FALSE);
60 }
61 for (c = 0; c < children; c++) {
62 is_log = is_special = 0;
63 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG,
64 &is_log);
65 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_SPECIAL,
66 &is_special);
67 if (!is_log && !is_special)
68 return (B_TRUE);
69 }
70 return (B_FALSE);
71 }
72
73 void
74 zpool_get_rewind_policy(nvlist_t *nvl, zpool_rewind_policy_t *zrpp)
75 {
76 nvlist_t *policy;
77 nvpair_t *elem;
78 char *nm;
79
80 /* Defaults */
81 zrpp->zrp_request = ZPOOL_NO_REWIND;
82 zrpp->zrp_maxmeta = 0;
83 zrpp->zrp_maxdata = UINT64_MAX;
84 zrpp->zrp_txg = UINT64_MAX;
85
86 if (nvl == NULL)
87 return;
88
89 elem = NULL;
90 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
91 nm = nvpair_name(elem);
92 if (strcmp(nm, ZPOOL_REWIND_POLICY) == 0) {
93 if (nvpair_value_nvlist(elem, &policy) == 0)
94 zpool_get_rewind_policy(policy, zrpp);
95 return;
96 } else if (strcmp(nm, ZPOOL_REWIND_REQUEST) == 0) {
97 if (nvpair_value_uint32(elem, &zrpp->zrp_request) == 0)
98 if (zrpp->zrp_request & ~ZPOOL_REWIND_POLICIES)
99 zrpp->zrp_request = ZPOOL_NO_REWIND;
100 } else if (strcmp(nm, ZPOOL_REWIND_REQUEST_TXG) == 0) {
101 (void) nvpair_value_uint64(elem, &zrpp->zrp_txg);
102 } else if (strcmp(nm, ZPOOL_REWIND_META_THRESH) == 0) {
103 (void) nvpair_value_uint64(elem, &zrpp->zrp_maxmeta);
104 } else if (strcmp(nm, ZPOOL_REWIND_DATA_THRESH) == 0) {
105 (void) nvpair_value_uint64(elem, &zrpp->zrp_maxdata);
106 }
107 }
108 if (zrpp->zrp_request == 0)
109 zrpp->zrp_request = ZPOOL_NO_REWIND;
110 }
111
112 typedef struct zfs_version_spa_map {
113 int version_zpl;
114 int version_spa;
115 } zfs_version_spa_map_t;
116
117 /*
118 * Keep this table in monotonically increasing version number order.
119 */
120 static zfs_version_spa_map_t zfs_version_table[] = {
121 {ZPL_VERSION_INITIAL, SPA_VERSION_INITIAL},
122 {ZPL_VERSION_DIRENT_TYPE, SPA_VERSION_INITIAL},
123 {ZPL_VERSION_FUID, SPA_VERSION_FUID},
124 {ZPL_VERSION_USERSPACE, SPA_VERSION_USERSPACE},
125 {ZPL_VERSION_SA, SPA_VERSION_SA},
126 {0, 0}
127 };
128
129 /*
130 * Return the max zpl version for a corresponding spa version
131 * -1 is returned if no mapping exists.
132 */
133 int
134 zfs_zpl_version_map(int spa_version)
135 {
136 int i;
137 int version = -1;
138
139 for (i = 0; zfs_version_table[i].version_spa; i++) {
140 if (spa_version >= zfs_version_table[i].version_spa)
141 version = zfs_version_table[i].version_zpl;
142 }
143
144 return (version);
145 }
146
147 /*
148 * Return the min spa version for a corresponding spa version
149 * -1 is returned if no mapping exists.
150 */
151 int
152 zfs_spa_version_map(int zpl_version)
153 {
154 int i;
155 int version = -1;
156
157 for (i = 0; zfs_version_table[i].version_zpl; i++) {
158 if (zfs_version_table[i].version_zpl >= zpl_version)
159 return (zfs_version_table[i].version_spa);
160 }
161
162 return (version);
163 }
164
165 /*
166 * This is the table of legacy internal event names; it should not be modified.
167 * The internal events are now stored in the history log as strings.
168 */
169 const char *zfs_history_event_names[ZFS_NUM_LEGACY_HISTORY_EVENTS] = {
170 "invalid event",
171 "pool create",
172 "vdev add",
173 "pool remove",
174 "pool destroy",
175 "pool export",
176 "pool import",
177 "vdev attach",
178 "vdev replace",
179 "vdev detach",
180 "vdev online",
181 "vdev offline",
182 "vdev upgrade",
183 "pool clear",
184 "pool scrub",
185 "pool property set",
186 "create",
187 "clone",
188 "destroy",
189 "destroy_begin_sync",
190 "inherit",
191 "property set",
192 "quota set",
193 "permission update",
194 "permission remove",
195 "permission who remove",
196 "promote",
197 "receive",
198 "rename",
199 "reservation set",
200 "replay_inc_sync",
201 "replay_full_sync",
202 "rollback",
203 "snapshot",
204 "filesystem version upgrade",
205 "refquota set",
206 "refreservation set",
207 "pool scrub done",
208 "user hold",
209 "user release",
210 "pool split",
211 };