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, 2017 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 <string.h> 34 #endif 35 36 #include <sys/types.h> 37 #include <sys/fs/zfs.h> 38 #include <sys/nvpair.h> 39 #include "zfs_comutil.h" 40 #include <sys/zfs_ratelimit.h> 41 42 /* 43 * Are there allocatable vdevs? 44 */ 45 boolean_t 46 zfs_allocatable_devs(nvlist_t *nv) 47 { 48 uint64_t is_log; 49 uint_t c; 50 nvlist_t **child; 51 uint_t children; 52 53 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, 54 &child, &children) != 0) { 55 return (B_FALSE); 56 } 57 for (c = 0; c < children; c++) { 58 is_log = 0; 59 (void) nvlist_lookup_uint64(child[c], ZPOOL_CONFIG_IS_LOG, 60 &is_log); 61 if (!is_log) 62 return (B_TRUE); 63 } 64 return (B_FALSE); 65 } 66 67 /* 68 * Are there special vdevs? 69 */ 70 boolean_t 71 zfs_special_devs(nvlist_t *nv, char *type) 72 { 73 char *bias; 74 uint_t c; 75 nvlist_t **child; 76 uint_t children; 77 78 if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, 79 &child, &children) != 0) { 80 return (B_FALSE); 81 } 82 for (c = 0; c < children; c++) { 83 if (nvlist_lookup_string(child[c], ZPOOL_CONFIG_ALLOCATION_BIAS, 84 &bias) == 0) { 85 if (strcmp(bias, VDEV_ALLOC_BIAS_SPECIAL) == 0 || 86 strcmp(bias, VDEV_ALLOC_BIAS_DEDUP) == 0) { 87 if (type != NULL && strcmp(bias, type) == 0) { 88 return (B_TRUE); 89 } else if (type == NULL) { 90 return (B_TRUE); 91 } 92 } 93 } 94 } 95 return (B_FALSE); 96 } 97 98 void 99 zpool_get_load_policy(nvlist_t *nvl, zpool_load_policy_t *zlpp) 100 { 101 nvlist_t *policy; 102 nvpair_t *elem; 103 char *nm; 104 105 /* Defaults */ 106 zlpp->zlp_rewind = ZPOOL_NO_REWIND; 107 zlpp->zlp_maxmeta = 0; 108 zlpp->zlp_maxdata = UINT64_MAX; 109 zlpp->zlp_txg = UINT64_MAX; 110 111 if (nvl == NULL) 112 return; 113 114 elem = NULL; 115 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { 116 nm = nvpair_name(elem); 117 if (strcmp(nm, ZPOOL_LOAD_POLICY) == 0) { 118 if (nvpair_value_nvlist(elem, &policy) == 0) 119 zpool_get_load_policy(policy, zlpp); 120 return; 121 } else if (strcmp(nm, ZPOOL_LOAD_REWIND_POLICY) == 0) { 122 if (nvpair_value_uint32(elem, &zlpp->zlp_rewind) == 0) 123 if (zlpp->zlp_rewind & ~ZPOOL_REWIND_POLICIES) 124 zlpp->zlp_rewind = ZPOOL_NO_REWIND; 125 } else if (strcmp(nm, ZPOOL_LOAD_REQUEST_TXG) == 0) { 126 (void) nvpair_value_uint64(elem, &zlpp->zlp_txg); 127 } else if (strcmp(nm, ZPOOL_LOAD_META_THRESH) == 0) { 128 (void) nvpair_value_uint64(elem, &zlpp->zlp_maxmeta); 129 } else if (strcmp(nm, ZPOOL_LOAD_DATA_THRESH) == 0) { 130 (void) nvpair_value_uint64(elem, &zlpp->zlp_maxdata); 131 } 132 } 133 if (zlpp->zlp_rewind == 0) 134 zlpp->zlp_rewind = ZPOOL_NO_REWIND; 135 } 136 137 typedef struct zfs_version_spa_map { 138 int version_zpl; 139 int version_spa; 140 } zfs_version_spa_map_t; 141 142 /* 143 * Keep this table in monotonically increasing version number order. 144 */ 145 static zfs_version_spa_map_t zfs_version_table[] = { 146 {ZPL_VERSION_INITIAL, SPA_VERSION_INITIAL}, 147 {ZPL_VERSION_DIRENT_TYPE, SPA_VERSION_INITIAL}, 148 {ZPL_VERSION_FUID, SPA_VERSION_FUID}, 149 {ZPL_VERSION_USERSPACE, SPA_VERSION_USERSPACE}, 150 {ZPL_VERSION_SA, SPA_VERSION_SA}, 151 {0, 0} 152 }; 153 154 /* 155 * Return the max zpl version for a corresponding spa version 156 * -1 is returned if no mapping exists. 157 */ 158 int 159 zfs_zpl_version_map(int spa_version) 160 { 161 int i; 162 int version = -1; 163 164 for (i = 0; zfs_version_table[i].version_spa; i++) { 165 if (spa_version >= zfs_version_table[i].version_spa) 166 version = zfs_version_table[i].version_zpl; 167 } 168 169 return (version); 170 } 171 172 /* 173 * Return the min spa version for a corresponding spa version 174 * -1 is returned if no mapping exists. 175 */ 176 int 177 zfs_spa_version_map(int zpl_version) 178 { 179 int i; 180 int version = -1; 181 182 for (i = 0; zfs_version_table[i].version_zpl; i++) { 183 if (zfs_version_table[i].version_zpl >= zpl_version) 184 return (zfs_version_table[i].version_spa); 185 } 186 187 return (version); 188 } 189 190 /* 191 * This is the table of legacy internal event names; it should not be modified. 192 * The internal events are now stored in the history log as strings. 193 */ 194 const char *zfs_history_event_names[ZFS_NUM_LEGACY_HISTORY_EVENTS] = { 195 "invalid event", 196 "pool create", 197 "vdev add", 198 "pool remove", 199 "pool destroy", 200 "pool export", 201 "pool import", 202 "vdev attach", 203 "vdev replace", 204 "vdev detach", 205 "vdev online", 206 "vdev offline", 207 "vdev upgrade", 208 "pool clear", 209 "pool scrub", 210 "pool property set", 211 "create", 212 "clone", 213 "destroy", 214 "destroy_begin_sync", 215 "inherit", 216 "property set", 217 "quota set", 218 "permission update", 219 "permission remove", 220 "permission who remove", 221 "promote", 222 "receive", 223 "rename", 224 "reservation set", 225 "replay_inc_sync", 226 "replay_full_sync", 227 "rollback", 228 "snapshot", 229 "filesystem version upgrade", 230 "refquota set", 231 "refreservation set", 232 "pool scrub done", 233 "user hold", 234 "user release", 235 "pool split", 236 }; 237 238 boolean_t 239 zfs_dataset_name_hidden(const char *name) 240 { 241 /* 242 * Skip over datasets that are not visible in this zone, 243 * internal datasets (which have a $ in their name), and 244 * temporary datasets (which have a % in their name). 245 */ 246 if (strchr(name, '$') != NULL) 247 return (B_TRUE); 248 if (strchr(name, '%') != NULL) 249 return (B_TRUE); 250 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL)) 251 return (B_TRUE); 252 return (B_FALSE); 253 } 254 255 #if defined(_KERNEL) 256 EXPORT_SYMBOL(zfs_allocatable_devs); 257 EXPORT_SYMBOL(zfs_special_devs); 258 EXPORT_SYMBOL(zpool_get_load_policy); 259 EXPORT_SYMBOL(zfs_zpl_version_map); 260 EXPORT_SYMBOL(zfs_spa_version_map); 261 EXPORT_SYMBOL(zfs_history_event_names); 262 EXPORT_SYMBOL(zfs_dataset_name_hidden); 263 #endif 264