1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5ea8dc4b6Seschrock * Common Development and Distribution License (the "License"). 6ea8dc4b6Seschrock * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 2199653d4eSeschrock 22fa9e4066Sahrens /* 233f9d6ad7SLin Ling * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 248704186eSDan McDonald * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 2511f6a968SSerapheim Dimitropoulos * Copyright (c) 2011, 2018 by Delphix. All rights reserved. 26ce1577b0SDave Eddy * Copyright 2017 Joyent, Inc. 27fa9e4066Sahrens */ 28fa9e4066Sahrens 29fa9e4066Sahrens #include <sys/spa.h> 303cb69f73SWill Andrews #include <sys/fm/fs/zfs.h> 31fa9e4066Sahrens #include <sys/spa_impl.h> 32fa9e4066Sahrens #include <sys/nvpair.h> 33fa9e4066Sahrens #include <sys/uio.h> 34fa9e4066Sahrens #include <sys/fs/zfs.h> 35fa9e4066Sahrens #include <sys/vdev_impl.h> 36fa9e4066Sahrens #include <sys/zfs_ioctl.h> 3795173954Sek #include <sys/utsname.h> 3895173954Sek #include <sys/systeminfo.h> 3995173954Sek #include <sys/sunddi.h> 40ad135b5dSChristopher Siden #include <sys/zfeature.h> 41ea8dc4b6Seschrock #ifdef _KERNEL 42ea8dc4b6Seschrock #include <sys/kobj.h> 435679c89fSjv #include <sys/zone.h> 44ea8dc4b6Seschrock #endif 45ea8dc4b6Seschrock 46fa9e4066Sahrens /* 47fa9e4066Sahrens * Pool configuration repository. 48fa9e4066Sahrens * 492f8aaab3Seschrock * Pool configuration is stored as a packed nvlist on the filesystem. By 502f8aaab3Seschrock * default, all pools are stored in /etc/zfs/zpool.cache and loaded on boot 512f8aaab3Seschrock * (when the ZFS module is loaded). Pools can also have the 'cachefile' 522f8aaab3Seschrock * property set that allows them to be stored in an alternate location until 532f8aaab3Seschrock * the control of external software. 54fa9e4066Sahrens * 552f8aaab3Seschrock * For each cache file, we have a single nvlist which holds all the 562f8aaab3Seschrock * configuration information. When the module loads, we read this information 572f8aaab3Seschrock * from /etc/zfs/zpool.cache and populate the SPA namespace. This namespace is 582f8aaab3Seschrock * maintained independently in spa.c. Whenever the namespace is modified, or 595cabbc6bSPrashanth Sreenivasa * the configuration of a pool is changed, we call spa_write_cachefile(), which 602f8aaab3Seschrock * walks through all the active pools and writes the configuration to disk. 61fa9e4066Sahrens */ 62fa9e4066Sahrens 63fa9e4066Sahrens static uint64_t spa_config_generation = 1; 64fa9e4066Sahrens 65fa9e4066Sahrens /* 66fa9e4066Sahrens * This can be overridden in userland to preserve an alternate namespace for 67fa9e4066Sahrens * userland pools when doing testing. 68fa9e4066Sahrens */ 69c5904d13Seschrock const char *spa_config_path = ZPOOL_CACHE; 70fa9e4066Sahrens 71fa9e4066Sahrens /* 72fa9e4066Sahrens * Called when the module is first loaded, this routine loads the configuration 73fa9e4066Sahrens * file into the SPA namespace. It does not actually open or load the pools; it 74fa9e4066Sahrens * only populates the namespace. 75fa9e4066Sahrens */ 76fa9e4066Sahrens void 77fa9e4066Sahrens spa_config_load(void) 78fa9e4066Sahrens { 79fa9e4066Sahrens void *buf = NULL; 80fa9e4066Sahrens nvlist_t *nvlist, *child; 81fa9e4066Sahrens nvpair_t *nvpair; 82e14bb325SJeff Bonwick char *pathname; 83ea8dc4b6Seschrock struct _buf *file; 84b1b8ab34Slling uint64_t fsize; 85fa9e4066Sahrens 86fa9e4066Sahrens /* 87fa9e4066Sahrens * Open the configuration file. 88fa9e4066Sahrens */ 89e14bb325SJeff Bonwick pathname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 90e14bb325SJeff Bonwick 91e14bb325SJeff Bonwick (void) snprintf(pathname, MAXPATHLEN, "%s%s", 92c5904d13Seschrock (rootdir != NULL) ? "./" : "", spa_config_path); 93ea8dc4b6Seschrock 94ea8dc4b6Seschrock file = kobj_open_file(pathname); 95e14bb325SJeff Bonwick 96e14bb325SJeff Bonwick kmem_free(pathname, MAXPATHLEN); 97e14bb325SJeff Bonwick 98ea8dc4b6Seschrock if (file == (struct _buf *)-1) 99fa9e4066Sahrens return; 100fa9e4066Sahrens 101b1b8ab34Slling if (kobj_get_filesize(file, &fsize) != 0) 102fa9e4066Sahrens goto out; 103fa9e4066Sahrens 104b1b8ab34Slling buf = kmem_alloc(fsize, KM_SLEEP); 105fa9e4066Sahrens 106ea8dc4b6Seschrock /* 107ea8dc4b6Seschrock * Read the nvlist from the file. 108ea8dc4b6Seschrock */ 109b1b8ab34Slling if (kobj_read_file(file, buf, fsize, 0) < 0) 110fa9e4066Sahrens goto out; 111fa9e4066Sahrens 112fa9e4066Sahrens /* 113fa9e4066Sahrens * Unpack the nvlist. 114fa9e4066Sahrens */ 115b1b8ab34Slling if (nvlist_unpack(buf, fsize, &nvlist, KM_SLEEP) != 0) 116fa9e4066Sahrens goto out; 117fa9e4066Sahrens 118fa9e4066Sahrens /* 119fa9e4066Sahrens * Iterate over all elements in the nvlist, creating a new spa_t for 120fa9e4066Sahrens * each one with the specified configuration. 121fa9e4066Sahrens */ 122fa9e4066Sahrens mutex_enter(&spa_namespace_lock); 123fa9e4066Sahrens nvpair = NULL; 124fa9e4066Sahrens while ((nvpair = nvlist_next_nvpair(nvlist, nvpair)) != NULL) { 125fa9e4066Sahrens if (nvpair_type(nvpair) != DATA_TYPE_NVLIST) 126fa9e4066Sahrens continue; 127fa9e4066Sahrens 128215198a6SJoe Stein child = fnvpair_value_nvlist(nvpair); 129fa9e4066Sahrens 130fa9e4066Sahrens if (spa_lookup(nvpair_name(nvpair)) != NULL) 131fa9e4066Sahrens continue; 132468c413aSTim Haley (void) spa_add(nvpair_name(nvpair), child, NULL); 133fa9e4066Sahrens } 134fa9e4066Sahrens mutex_exit(&spa_namespace_lock); 135fa9e4066Sahrens 136fa9e4066Sahrens nvlist_free(nvlist); 137fa9e4066Sahrens 138fa9e4066Sahrens out: 139fa9e4066Sahrens if (buf != NULL) 140b1b8ab34Slling kmem_free(buf, fsize); 141fa9e4066Sahrens 142ea8dc4b6Seschrock kobj_close_file(file); 143fa9e4066Sahrens } 144fa9e4066Sahrens 1453cb69f73SWill Andrews static int 146c5904d13Seschrock spa_config_write(spa_config_dirent_t *dp, nvlist_t *nvl) 1472f8aaab3Seschrock { 1482f8aaab3Seschrock size_t buflen; 1492f8aaab3Seschrock char *buf; 1502f8aaab3Seschrock vnode_t *vp; 1512f8aaab3Seschrock int oflags = FWRITE | FTRUNC | FCREAT | FOFFMAX; 152e14bb325SJeff Bonwick char *temp; 1533cb69f73SWill Andrews int err; 154c5904d13Seschrock 155c5904d13Seschrock /* 156c5904d13Seschrock * If the nvlist is empty (NULL), then remove the old cachefile. 157c5904d13Seschrock */ 158c5904d13Seschrock if (nvl == NULL) { 1593cb69f73SWill Andrews err = vn_remove(dp->scd_path, UIO_SYSSPACE, RMFILE); 1603cb69f73SWill Andrews return (err); 161c5904d13Seschrock } 1622f8aaab3Seschrock 163fa9e4066Sahrens /* 164fa9e4066Sahrens * Pack the configuration into a buffer. 165fa9e4066Sahrens */ 166215198a6SJoe Stein buf = fnvlist_pack(nvl, &buflen); 167e14bb325SJeff Bonwick temp = kmem_zalloc(MAXPATHLEN, KM_SLEEP); 168fa9e4066Sahrens 169fa9e4066Sahrens /* 170fa9e4066Sahrens * Write the configuration to disk. We need to do the traditional 171fa9e4066Sahrens * 'write to temporary file, sync, move over original' to make sure we 172fa9e4066Sahrens * always have a consistent view of the data. 173fa9e4066Sahrens */ 174e14bb325SJeff Bonwick (void) snprintf(temp, MAXPATHLEN, "%s.tmp", dp->scd_path); 175fa9e4066Sahrens 1763cb69f73SWill Andrews err = vn_open(temp, UIO_SYSSPACE, oflags, 0644, &vp, CRCREAT, 0); 1773cb69f73SWill Andrews if (err == 0) { 1783cb69f73SWill Andrews err = vn_rdwr(UIO_WRITE, vp, buf, buflen, 0, UIO_SYSSPACE, 1793cb69f73SWill Andrews 0, RLIM64_INFINITY, kcred, NULL); 1803cb69f73SWill Andrews if (err == 0) 1813cb69f73SWill Andrews err = VOP_FSYNC(vp, FSYNC, kcred, NULL); 1823cb69f73SWill Andrews if (err == 0) 1833cb69f73SWill Andrews err = vn_rename(temp, dp->scd_path, UIO_SYSSPACE); 184e14bb325SJeff Bonwick (void) VOP_CLOSE(vp, oflags, 1, 0, kcred, NULL); 185e14bb325SJeff Bonwick VN_RELE(vp); 186fa9e4066Sahrens } 187fa9e4066Sahrens 188e14bb325SJeff Bonwick (void) vn_remove(temp, UIO_SYSSPACE, RMFILE); 189fa9e4066Sahrens 190215198a6SJoe Stein fnvlist_pack_free(buf, buflen); 191e14bb325SJeff Bonwick kmem_free(temp, MAXPATHLEN); 1923cb69f73SWill Andrews return (err); 1932f8aaab3Seschrock } 1942f8aaab3Seschrock 1952f8aaab3Seschrock /* 196c5904d13Seschrock * Synchronize pool configuration to disk. This must be called with the 197b4952e17SGeorge Wilson * namespace lock held. Synchronizing the pool cache is typically done after 198b4952e17SGeorge Wilson * the configuration has been synced to the MOS. This exposes a window where 199b4952e17SGeorge Wilson * the MOS config will have been updated but the cache file has not. If 200b4952e17SGeorge Wilson * the system were to crash at that instant then the cached config may not 2015cabbc6bSPrashanth Sreenivasa * contain the correct information to open the pool and an explicit import 202b4952e17SGeorge Wilson * would be required. 2032f8aaab3Seschrock */ 2042f8aaab3Seschrock void 2055cabbc6bSPrashanth Sreenivasa spa_write_cachefile(spa_t *target, boolean_t removing, boolean_t postsysevent) 2062f8aaab3Seschrock { 207c5904d13Seschrock spa_config_dirent_t *dp, *tdp; 208c5904d13Seschrock nvlist_t *nvl; 2093cb69f73SWill Andrews boolean_t ccw_failure; 2103cb69f73SWill Andrews int error; 21104e56356SAndriy Gapon char *pool_name; 2122f8aaab3Seschrock 2132f8aaab3Seschrock ASSERT(MUTEX_HELD(&spa_namespace_lock)); 2142f8aaab3Seschrock 2154f0f5e5bSVictor Latushkin if (rootdir == NULL || !(spa_mode_global & FWRITE)) 2169fddc96aSGeorge Wilson return; 2179fddc96aSGeorge Wilson 218c5904d13Seschrock /* 219c5904d13Seschrock * Iterate over all cachefiles for the pool, past or present. When the 220c5904d13Seschrock * cachefile is changed, the new one is pushed onto this list, allowing 221c5904d13Seschrock * us to update previous cachefiles that no longer contain this pool. 222c5904d13Seschrock */ 2233cb69f73SWill Andrews ccw_failure = B_FALSE; 224c5904d13Seschrock for (dp = list_head(&target->spa_config_list); dp != NULL; 225c5904d13Seschrock dp = list_next(&target->spa_config_list, dp)) { 226e14bb325SJeff Bonwick spa_t *spa = NULL; 227c5904d13Seschrock if (dp->scd_path == NULL) 228c5904d13Seschrock continue; 229c5904d13Seschrock 230c5904d13Seschrock /* 231c5904d13Seschrock * Iterate over all pools, adding any matching pools to 'nvl'. 232c5904d13Seschrock */ 233c5904d13Seschrock nvl = NULL; 234c5904d13Seschrock while ((spa = spa_next(spa)) != NULL) { 235fb02ae02SGeorge Wilson /* 236fb02ae02SGeorge Wilson * Skip over our own pool if we're about to remove 237fb02ae02SGeorge Wilson * ourselves from the spa namespace or any pool that 238fb02ae02SGeorge Wilson * is readonly. Since we cannot guarantee that a 239fb02ae02SGeorge Wilson * readonly pool would successfully import upon reboot, 240fb02ae02SGeorge Wilson * we don't allow them to be written to the cache file. 241fb02ae02SGeorge Wilson */ 242fb02ae02SGeorge Wilson if ((spa == target && removing) || 243fb02ae02SGeorge Wilson !spa_writeable(spa)) 244c5904d13Seschrock continue; 245c5904d13Seschrock 246e14bb325SJeff Bonwick mutex_enter(&spa->spa_props_lock); 247c5904d13Seschrock tdp = list_head(&spa->spa_config_list); 248e14bb325SJeff Bonwick if (spa->spa_config == NULL || 249e14bb325SJeff Bonwick tdp->scd_path == NULL || 250e14bb325SJeff Bonwick strcmp(tdp->scd_path, dp->scd_path) != 0) { 251e14bb325SJeff Bonwick mutex_exit(&spa->spa_props_lock); 252c5904d13Seschrock continue; 253e14bb325SJeff Bonwick } 254c5904d13Seschrock 255c5904d13Seschrock if (nvl == NULL) 256215198a6SJoe Stein nvl = fnvlist_alloc(); 257c5904d13Seschrock 25804e56356SAndriy Gapon if (spa->spa_import_flags & ZFS_IMPORT_TEMP_NAME) { 25904e56356SAndriy Gapon pool_name = fnvlist_lookup_string( 26004e56356SAndriy Gapon spa->spa_config, ZPOOL_CONFIG_POOL_NAME); 26104e56356SAndriy Gapon } else { 26204e56356SAndriy Gapon pool_name = spa_name(spa); 26304e56356SAndriy Gapon } 26404e56356SAndriy Gapon 26504e56356SAndriy Gapon fnvlist_add_nvlist(nvl, pool_name, 266215198a6SJoe Stein spa->spa_config); 267e14bb325SJeff Bonwick mutex_exit(&spa->spa_props_lock); 268c5904d13Seschrock } 269c5904d13Seschrock 2703cb69f73SWill Andrews error = spa_config_write(dp, nvl); 2713cb69f73SWill Andrews if (error != 0) 2723cb69f73SWill Andrews ccw_failure = B_TRUE; 273c5904d13Seschrock nvlist_free(nvl); 274c5904d13Seschrock } 2752f8aaab3Seschrock 2763cb69f73SWill Andrews if (ccw_failure) { 2773cb69f73SWill Andrews /* 2783cb69f73SWill Andrews * Keep trying so that configuration data is 2793cb69f73SWill Andrews * written if/when any temporary filesystem 2803cb69f73SWill Andrews * resource issues are resolved. 2813cb69f73SWill Andrews */ 2823cb69f73SWill Andrews if (target->spa_ccw_fail_time == 0) { 2833cb69f73SWill Andrews zfs_ereport_post(FM_EREPORT_ZFS_CONFIG_CACHE_WRITE, 284*eb633035STom Caputi target, NULL, NULL, NULL, 0, 0); 2853cb69f73SWill Andrews } 2863cb69f73SWill Andrews target->spa_ccw_fail_time = gethrtime(); 2873cb69f73SWill Andrews spa_async_request(target, SPA_ASYNC_CONFIG_UPDATE); 2883cb69f73SWill Andrews } else { 2893cb69f73SWill Andrews /* 2903cb69f73SWill Andrews * Do not rate limit future attempts to update 2913cb69f73SWill Andrews * the config cache. 2923cb69f73SWill Andrews */ 2933cb69f73SWill Andrews target->spa_ccw_fail_time = 0; 2943cb69f73SWill Andrews } 2953cb69f73SWill Andrews 2962f8aaab3Seschrock /* 297c5904d13Seschrock * Remove any config entries older than the current one. 2982f8aaab3Seschrock */ 299c5904d13Seschrock dp = list_head(&target->spa_config_list); 300c5904d13Seschrock while ((tdp = list_next(&target->spa_config_list, dp)) != NULL) { 301c5904d13Seschrock list_remove(&target->spa_config_list, tdp); 302c5904d13Seschrock if (tdp->scd_path != NULL) 303c5904d13Seschrock spa_strfree(tdp->scd_path); 304c5904d13Seschrock kmem_free(tdp, sizeof (spa_config_dirent_t)); 3052f8aaab3Seschrock } 3062f8aaab3Seschrock 3072f8aaab3Seschrock spa_config_generation++; 308c5904d13Seschrock 309c5904d13Seschrock if (postsysevent) 310ce1577b0SDave Eddy spa_event_notify(target, NULL, NULL, ESC_ZFS_CONFIG_SYNC); 311fa9e4066Sahrens } 312fa9e4066Sahrens 313fa9e4066Sahrens /* 3140373e76bSbonwick * Sigh. Inside a local zone, we don't have access to /etc/zfs/zpool.cache, 315fa9e4066Sahrens * and we don't want to allow the local zone to see all the pools anyway. 316fa9e4066Sahrens * So we have to invent the ZFS_IOC_CONFIG ioctl to grab the configuration 317fa9e4066Sahrens * information for all pool visible within the zone. 318fa9e4066Sahrens */ 319fa9e4066Sahrens nvlist_t * 320fa9e4066Sahrens spa_all_configs(uint64_t *generation) 321fa9e4066Sahrens { 322fa9e4066Sahrens nvlist_t *pools; 323e14bb325SJeff Bonwick spa_t *spa = NULL; 324fa9e4066Sahrens 325fa9e4066Sahrens if (*generation == spa_config_generation) 326fa9e4066Sahrens return (NULL); 327fa9e4066Sahrens 328215198a6SJoe Stein pools = fnvlist_alloc(); 329fa9e4066Sahrens 330fa9e4066Sahrens mutex_enter(&spa_namespace_lock); 331fa9e4066Sahrens while ((spa = spa_next(spa)) != NULL) { 332fa9e4066Sahrens if (INGLOBALZONE(curproc) || 333fa9e4066Sahrens zone_dataset_visible(spa_name(spa), NULL)) { 334e14bb325SJeff Bonwick mutex_enter(&spa->spa_props_lock); 335215198a6SJoe Stein fnvlist_add_nvlist(pools, spa_name(spa), 336215198a6SJoe Stein spa->spa_config); 337e14bb325SJeff Bonwick mutex_exit(&spa->spa_props_lock); 338fa9e4066Sahrens } 339fa9e4066Sahrens } 340fa9e4066Sahrens *generation = spa_config_generation; 341e14bb325SJeff Bonwick mutex_exit(&spa_namespace_lock); 342fa9e4066Sahrens 343fa9e4066Sahrens return (pools); 344fa9e4066Sahrens } 345fa9e4066Sahrens 346fa9e4066Sahrens void 347fa9e4066Sahrens spa_config_set(spa_t *spa, nvlist_t *config) 348fa9e4066Sahrens { 349e14bb325SJeff Bonwick mutex_enter(&spa->spa_props_lock); 3506f793812SPavel Zakharov if (spa->spa_config != NULL && spa->spa_config != config) 3516f793812SPavel Zakharov nvlist_free(spa->spa_config); 352fa9e4066Sahrens spa->spa_config = config; 353e14bb325SJeff Bonwick mutex_exit(&spa->spa_props_lock); 354fa9e4066Sahrens } 355fa9e4066Sahrens 356fa9e4066Sahrens /* 357fa9e4066Sahrens * Generate the pool's configuration based on the current in-core state. 358f7170741SWill Andrews * 359fa9e4066Sahrens * We infer whether to generate a complete config or just one top-level config 360fa9e4066Sahrens * based on whether vd is the root vdev. 361fa9e4066Sahrens */ 362fa9e4066Sahrens nvlist_t * 363fa9e4066Sahrens spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg, int getstats) 364fa9e4066Sahrens { 365fa9e4066Sahrens nvlist_t *config, *nvroot; 366fa9e4066Sahrens vdev_t *rvd = spa->spa_root_vdev; 36795173954Sek unsigned long hostid = 0; 368e14bb325SJeff Bonwick boolean_t locked = B_FALSE; 3691195e687SMark J Musante uint64_t split_guid; 37004e56356SAndriy Gapon char *pool_name; 371fa9e4066Sahrens 372e14bb325SJeff Bonwick if (vd == NULL) { 373fa9e4066Sahrens vd = rvd; 374e14bb325SJeff Bonwick locked = B_TRUE; 375e14bb325SJeff Bonwick spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); 376e14bb325SJeff Bonwick } 377e14bb325SJeff Bonwick 378e14bb325SJeff Bonwick ASSERT(spa_config_held(spa, SCL_CONFIG | SCL_STATE, RW_READER) == 379e14bb325SJeff Bonwick (SCL_CONFIG | SCL_STATE)); 380fa9e4066Sahrens 381fa9e4066Sahrens /* 382fa9e4066Sahrens * If txg is -1, report the current value of spa->spa_config_txg. 383fa9e4066Sahrens */ 384fa9e4066Sahrens if (txg == -1ULL) 385fa9e4066Sahrens txg = spa->spa_config_txg; 386fa9e4066Sahrens 38704e56356SAndriy Gapon /* 38804e56356SAndriy Gapon * Originally, users had to handle spa namespace collisions by either 38904e56356SAndriy Gapon * exporting the already imported pool or by specifying a new name for 39004e56356SAndriy Gapon * the pool with a conflicting name. In the case of root pools from 39104e56356SAndriy Gapon * virtual guests, neither approach to collision resolution is 39204e56356SAndriy Gapon * reasonable. This is addressed by extending the new name syntax with 39304e56356SAndriy Gapon * an option to specify that the new name is temporary. When specified, 39404e56356SAndriy Gapon * ZFS_IMPORT_TEMP_NAME will be set in spa->spa_import_flags to tell us 39504e56356SAndriy Gapon * to use the previous name, which we do below. 39604e56356SAndriy Gapon */ 39704e56356SAndriy Gapon if (spa->spa_import_flags & ZFS_IMPORT_TEMP_NAME) { 39804e56356SAndriy Gapon pool_name = fnvlist_lookup_string(spa->spa_config, 39904e56356SAndriy Gapon ZPOOL_CONFIG_POOL_NAME); 40004e56356SAndriy Gapon } else { 40104e56356SAndriy Gapon pool_name = spa_name(spa); 40204e56356SAndriy Gapon } 40304e56356SAndriy Gapon 404215198a6SJoe Stein config = fnvlist_alloc(); 4058704186eSDan McDonald 406215198a6SJoe Stein fnvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, spa_version(spa)); 40704e56356SAndriy Gapon fnvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, pool_name); 408215198a6SJoe Stein fnvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, spa_state(spa)); 409215198a6SJoe Stein fnvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG, txg); 410215198a6SJoe Stein fnvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID, spa_guid(spa)); 411*eb633035STom Caputi fnvlist_add_uint64(config, ZPOOL_CONFIG_ERRATA, spa->spa_errata); 412215198a6SJoe Stein if (spa->spa_comment != NULL) { 413215198a6SJoe Stein fnvlist_add_string(config, ZPOOL_CONFIG_COMMENT, 414215198a6SJoe Stein spa->spa_comment); 415215198a6SJoe Stein } 4168704186eSDan McDonald 417e0f1c0afSOlaf Faaland hostid = spa_get_hostid(); 41817194a52Slling if (hostid != 0) { 419215198a6SJoe Stein fnvlist_add_uint64(config, ZPOOL_CONFIG_HOSTID, hostid); 42017194a52Slling } 421215198a6SJoe Stein fnvlist_add_string(config, ZPOOL_CONFIG_HOSTNAME, utsname.nodename); 422fa9e4066Sahrens 423215198a6SJoe Stein int config_gen_flags = 0; 424fa9e4066Sahrens if (vd != rvd) { 425215198a6SJoe Stein fnvlist_add_uint64(config, ZPOOL_CONFIG_TOP_GUID, 426215198a6SJoe Stein vd->vdev_top->vdev_guid); 427215198a6SJoe Stein fnvlist_add_uint64(config, ZPOOL_CONFIG_GUID, 428215198a6SJoe Stein vd->vdev_guid); 429215198a6SJoe Stein if (vd->vdev_isspare) { 430215198a6SJoe Stein fnvlist_add_uint64(config, 431215198a6SJoe Stein ZPOOL_CONFIG_IS_SPARE, 1ULL); 432215198a6SJoe Stein } 433215198a6SJoe Stein if (vd->vdev_islog) { 434215198a6SJoe Stein fnvlist_add_uint64(config, 435215198a6SJoe Stein ZPOOL_CONFIG_IS_LOG, 1ULL); 436215198a6SJoe Stein } 437fa9e4066Sahrens vd = vd->vdev_top; /* label contains top config */ 4381195e687SMark J Musante } else { 4391195e687SMark J Musante /* 4401195e687SMark J Musante * Only add the (potentially large) split information 4411195e687SMark J Musante * in the mos config, and not in the vdev labels 4421195e687SMark J Musante */ 4431195e687SMark J Musante if (spa->spa_config_splitting != NULL) 444215198a6SJoe Stein fnvlist_add_nvlist(config, ZPOOL_CONFIG_SPLIT, 445215198a6SJoe Stein spa->spa_config_splitting); 446215198a6SJoe Stein fnvlist_add_boolean(config, 447215198a6SJoe Stein ZPOOL_CONFIG_HAS_PER_VDEV_ZAPS); 448215198a6SJoe Stein 449215198a6SJoe Stein config_gen_flags |= VDEV_CONFIG_MOS; 450fa9e4066Sahrens } 451fa9e4066Sahrens 45288ecc943SGeorge Wilson /* 45388ecc943SGeorge Wilson * Add the top-level config. We even add this on pools which 4544b964adaSGeorge Wilson * don't support holes in the namespace. 45588ecc943SGeorge Wilson */ 45688ecc943SGeorge Wilson vdev_top_config_generate(spa, config); 45788ecc943SGeorge Wilson 4581195e687SMark J Musante /* 4591195e687SMark J Musante * If we're splitting, record the original pool's guid. 4601195e687SMark J Musante */ 4611195e687SMark J Musante if (spa->spa_config_splitting != NULL && 4621195e687SMark J Musante nvlist_lookup_uint64(spa->spa_config_splitting, 4631195e687SMark J Musante ZPOOL_CONFIG_SPLIT_GUID, &split_guid) == 0) { 464215198a6SJoe Stein fnvlist_add_uint64(config, ZPOOL_CONFIG_SPLIT_GUID, 465215198a6SJoe Stein split_guid); 4661195e687SMark J Musante } 4671195e687SMark J Musante 468215198a6SJoe Stein nvroot = vdev_config_generate(spa, vd, getstats, config_gen_flags); 469215198a6SJoe Stein fnvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot); 470fa9e4066Sahrens nvlist_free(nvroot); 471fa9e4066Sahrens 472ad135b5dSChristopher Siden /* 473ad135b5dSChristopher Siden * Store what's necessary for reading the MOS in the label. 474ad135b5dSChristopher Siden */ 475215198a6SJoe Stein fnvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURES_FOR_READ, 476215198a6SJoe Stein spa->spa_label_features); 477ad135b5dSChristopher Siden 4789eb19f4dSGeorge Wilson if (getstats && spa_load_state(spa) == SPA_LOAD_NONE) { 4799eb19f4dSGeorge Wilson ddt_histogram_t *ddh; 4809eb19f4dSGeorge Wilson ddt_stat_t *dds; 4819eb19f4dSGeorge Wilson ddt_object_t *ddo; 4829eb19f4dSGeorge Wilson 4839eb19f4dSGeorge Wilson ddh = kmem_zalloc(sizeof (ddt_histogram_t), KM_SLEEP); 4849eb19f4dSGeorge Wilson ddt_get_dedup_histogram(spa, ddh); 485215198a6SJoe Stein fnvlist_add_uint64_array(config, 4869eb19f4dSGeorge Wilson ZPOOL_CONFIG_DDT_HISTOGRAM, 487215198a6SJoe Stein (uint64_t *)ddh, sizeof (*ddh) / sizeof (uint64_t)); 4889eb19f4dSGeorge Wilson kmem_free(ddh, sizeof (ddt_histogram_t)); 4899eb19f4dSGeorge Wilson 4909eb19f4dSGeorge Wilson ddo = kmem_zalloc(sizeof (ddt_object_t), KM_SLEEP); 4919eb19f4dSGeorge Wilson ddt_get_dedup_object_stats(spa, ddo); 492215198a6SJoe Stein fnvlist_add_uint64_array(config, 4939eb19f4dSGeorge Wilson ZPOOL_CONFIG_DDT_OBJ_STATS, 494215198a6SJoe Stein (uint64_t *)ddo, sizeof (*ddo) / sizeof (uint64_t)); 4959eb19f4dSGeorge Wilson kmem_free(ddo, sizeof (ddt_object_t)); 4969eb19f4dSGeorge Wilson 4979eb19f4dSGeorge Wilson dds = kmem_zalloc(sizeof (ddt_stat_t), KM_SLEEP); 4989eb19f4dSGeorge Wilson ddt_get_dedup_stats(spa, dds); 499215198a6SJoe Stein fnvlist_add_uint64_array(config, 5009eb19f4dSGeorge Wilson ZPOOL_CONFIG_DDT_STATS, 501215198a6SJoe Stein (uint64_t *)dds, sizeof (*dds) / sizeof (uint64_t)); 5029eb19f4dSGeorge Wilson kmem_free(dds, sizeof (ddt_stat_t)); 5039eb19f4dSGeorge Wilson } 5049eb19f4dSGeorge Wilson 505e14bb325SJeff Bonwick if (locked) 506e14bb325SJeff Bonwick spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 507e14bb325SJeff Bonwick 508fa9e4066Sahrens return (config); 509fa9e4066Sahrens } 5100373e76bSbonwick 511e7cbe64fSgw /* 512e7cbe64fSgw * Update all disk labels, generate a fresh config based on the current 513e7cbe64fSgw * in-core state, and sync the global config cache (do not sync the config 514e7cbe64fSgw * cache if this is a booting rootpool). 515e7cbe64fSgw */ 516e7cbe64fSgw void 517bc758434SLin Ling spa_config_update(spa_t *spa, int what) 5180373e76bSbonwick { 5190373e76bSbonwick vdev_t *rvd = spa->spa_root_vdev; 5200373e76bSbonwick uint64_t txg; 5210373e76bSbonwick int c; 5220373e76bSbonwick 5230373e76bSbonwick ASSERT(MUTEX_HELD(&spa_namespace_lock)); 5240373e76bSbonwick 525e14bb325SJeff Bonwick spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 5260373e76bSbonwick txg = spa_last_synced_txg(spa) + 1; 5270373e76bSbonwick if (what == SPA_CONFIG_UPDATE_POOL) { 5280373e76bSbonwick vdev_config_dirty(rvd); 5290373e76bSbonwick } else { 5300373e76bSbonwick /* 5310373e76bSbonwick * If we have top-level vdevs that were added but have 5320373e76bSbonwick * not yet been prepared for allocation, do that now. 5330373e76bSbonwick * (It's safe now because the config cache is up to date, 5340373e76bSbonwick * so it will be able to translate the new DVAs.) 5350373e76bSbonwick * See comments in spa_vdev_add() for full details. 5360373e76bSbonwick */ 5370373e76bSbonwick for (c = 0; c < rvd->vdev_children; c++) { 5380373e76bSbonwick vdev_t *tvd = rvd->vdev_child[c]; 53911f6a968SSerapheim Dimitropoulos 54011f6a968SSerapheim Dimitropoulos /* 54111f6a968SSerapheim Dimitropoulos * Explicitly skip vdevs that are indirect or 54211f6a968SSerapheim Dimitropoulos * log vdevs that are being removed. The reason 54311f6a968SSerapheim Dimitropoulos * is that both of those can have vdev_ms_array 54411f6a968SSerapheim Dimitropoulos * set to 0 and we wouldn't want to change their 54511f6a968SSerapheim Dimitropoulos * metaslab size nor call vdev_expand() on them. 54611f6a968SSerapheim Dimitropoulos */ 54711f6a968SSerapheim Dimitropoulos if (!vdev_is_concrete(tvd) || 54811f6a968SSerapheim Dimitropoulos (tvd->vdev_islog && tvd->vdev_removing)) 54911f6a968SSerapheim Dimitropoulos continue; 55011f6a968SSerapheim Dimitropoulos 551573ca77eSGeorge Wilson if (tvd->vdev_ms_array == 0) 552573ca77eSGeorge Wilson vdev_metaslab_set_size(tvd); 553573ca77eSGeorge Wilson vdev_expand(tvd, txg); 5540373e76bSbonwick } 5550373e76bSbonwick } 556e14bb325SJeff Bonwick spa_config_exit(spa, SCL_ALL, FTAG); 5570373e76bSbonwick 5580373e76bSbonwick /* 5590373e76bSbonwick * Wait for the mosconfig to be regenerated and synced. 5600373e76bSbonwick */ 5610373e76bSbonwick txg_wait_synced(spa->spa_dsl_pool, txg); 5620373e76bSbonwick 5630373e76bSbonwick /* 5640373e76bSbonwick * Update the global config cache to reflect the new mosconfig. 5650373e76bSbonwick */ 5665cabbc6bSPrashanth Sreenivasa if (!spa->spa_is_root) { 5675cabbc6bSPrashanth Sreenivasa spa_write_cachefile(spa, B_FALSE, 5685cabbc6bSPrashanth Sreenivasa what != SPA_CONFIG_UPDATE_POOL); 5695cabbc6bSPrashanth Sreenivasa } 5700373e76bSbonwick 5710373e76bSbonwick if (what == SPA_CONFIG_UPDATE_POOL) 572bc758434SLin Ling spa_config_update(spa, SPA_CONFIG_UPDATE_VDEVS); 5730373e76bSbonwick } 574