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 https://opensource.org/licenses/CDDL-1.0. 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 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, const char *type) 72 { 73 const 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 || 88 (type != NULL && strcmp(bias, type) == 0)) 89 return (B_TRUE); 90 } 91 } 92 } 93 return (B_FALSE); 94 } 95 96 void 97 zpool_get_load_policy(nvlist_t *nvl, zpool_load_policy_t *zlpp) 98 { 99 nvlist_t *policy; 100 nvpair_t *elem; 101 const char *nm; 102 103 /* Defaults */ 104 zlpp->zlp_rewind = ZPOOL_NO_REWIND; 105 zlpp->zlp_maxmeta = 0; 106 zlpp->zlp_maxdata = UINT64_MAX; 107 zlpp->zlp_txg = UINT64_MAX; 108 109 if (nvl == NULL) 110 return; 111 112 elem = NULL; 113 while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) { 114 nm = nvpair_name(elem); 115 if (strcmp(nm, ZPOOL_LOAD_POLICY) == 0) { 116 if (nvpair_value_nvlist(elem, &policy) == 0) 117 zpool_get_load_policy(policy, zlpp); 118 return; 119 } else if (strcmp(nm, ZPOOL_LOAD_REWIND_POLICY) == 0) { 120 if (nvpair_value_uint32(elem, &zlpp->zlp_rewind) == 0) 121 if (zlpp->zlp_rewind & ~ZPOOL_REWIND_POLICIES) 122 zlpp->zlp_rewind = ZPOOL_NO_REWIND; 123 } else if (strcmp(nm, ZPOOL_LOAD_REQUEST_TXG) == 0) { 124 (void) nvpair_value_uint64(elem, &zlpp->zlp_txg); 125 } else if (strcmp(nm, ZPOOL_LOAD_META_THRESH) == 0) { 126 (void) nvpair_value_uint64(elem, &zlpp->zlp_maxmeta); 127 } else if (strcmp(nm, ZPOOL_LOAD_DATA_THRESH) == 0) { 128 (void) nvpair_value_uint64(elem, &zlpp->zlp_maxdata); 129 } 130 } 131 if (zlpp->zlp_rewind == 0) 132 zlpp->zlp_rewind = ZPOOL_NO_REWIND; 133 } 134 135 typedef struct zfs_version_spa_map { 136 int version_zpl; 137 int version_spa; 138 } zfs_version_spa_map_t; 139 140 /* 141 * Keep this table in monotonically increasing version number order. 142 */ 143 static zfs_version_spa_map_t zfs_version_table[] = { 144 {ZPL_VERSION_INITIAL, SPA_VERSION_INITIAL}, 145 {ZPL_VERSION_DIRENT_TYPE, SPA_VERSION_INITIAL}, 146 {ZPL_VERSION_FUID, SPA_VERSION_FUID}, 147 {ZPL_VERSION_USERSPACE, SPA_VERSION_USERSPACE}, 148 {ZPL_VERSION_SA, SPA_VERSION_SA}, 149 {0, 0} 150 }; 151 152 /* 153 * Return the max zpl version for a corresponding spa version 154 * -1 is returned if no mapping exists. 155 */ 156 int 157 zfs_zpl_version_map(int spa_version) 158 { 159 int version = -1; 160 161 for (int i = 0; zfs_version_table[i].version_spa; i++) 162 if (spa_version >= zfs_version_table[i].version_spa) 163 version = zfs_version_table[i].version_zpl; 164 165 return (version); 166 } 167 168 /* 169 * Return the min spa version for a corresponding spa version 170 * -1 is returned if no mapping exists. 171 */ 172 int 173 zfs_spa_version_map(int zpl_version) 174 { 175 for (int i = 0; zfs_version_table[i].version_zpl; i++) 176 if (zfs_version_table[i].version_zpl >= zpl_version) 177 return (zfs_version_table[i].version_spa); 178 179 return (-1); 180 } 181 182 /* 183 * This is the table of legacy internal event names; it should not be modified. 184 * The internal events are now stored in the history log as strings. 185 */ 186 const char *const zfs_history_event_names[ZFS_NUM_LEGACY_HISTORY_EVENTS] = { 187 "invalid event", 188 "pool create", 189 "vdev add", 190 "pool remove", 191 "pool destroy", 192 "pool export", 193 "pool import", 194 "vdev attach", 195 "vdev replace", 196 "vdev detach", 197 "vdev online", 198 "vdev offline", 199 "vdev upgrade", 200 "pool clear", 201 "pool scrub", 202 "pool property set", 203 "create", 204 "clone", 205 "destroy", 206 "destroy_begin_sync", 207 "inherit", 208 "property set", 209 "quota set", 210 "permission update", 211 "permission remove", 212 "permission who remove", 213 "promote", 214 "receive", 215 "rename", 216 "reservation set", 217 "replay_inc_sync", 218 "replay_full_sync", 219 "rollback", 220 "snapshot", 221 "filesystem version upgrade", 222 "refquota set", 223 "refreservation set", 224 "pool scrub done", 225 "user hold", 226 "user release", 227 "pool split", 228 }; 229 230 boolean_t 231 zfs_dataset_name_hidden(const char *name) 232 { 233 /* 234 * Skip over datasets that are not visible in this zone, 235 * internal datasets (which have a $ in their name), and 236 * temporary datasets (which have a % in their name). 237 */ 238 if (strpbrk(name, "$%") != NULL) 239 return (B_TRUE); 240 if (!INGLOBALZONE(curproc) && !zone_dataset_visible(name, NULL)) 241 return (B_TRUE); 242 return (B_FALSE); 243 } 244 245 #if defined(_KERNEL) 246 EXPORT_SYMBOL(zfs_allocatable_devs); 247 EXPORT_SYMBOL(zfs_special_devs); 248 EXPORT_SYMBOL(zpool_get_load_policy); 249 EXPORT_SYMBOL(zfs_zpl_version_map); 250 EXPORT_SYMBOL(zfs_spa_version_map); 251 EXPORT_SYMBOL(zfs_history_event_names); 252 EXPORT_SYMBOL(zfs_dataset_name_hidden); 253 #endif 254