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 /* 235679c89fSjv * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24fa9e4066Sahrens * Use is subject to license terms. 25fa9e4066Sahrens */ 26fa9e4066Sahrens 27fa9e4066Sahrens #include <sys/spa.h> 28fa9e4066Sahrens #include <sys/spa_impl.h> 29fa9e4066Sahrens #include <sys/nvpair.h> 30fa9e4066Sahrens #include <sys/uio.h> 31fa9e4066Sahrens #include <sys/fs/zfs.h> 32fa9e4066Sahrens #include <sys/vdev_impl.h> 33fa9e4066Sahrens #include <sys/zfs_ioctl.h> 3495173954Sek #include <sys/utsname.h> 3595173954Sek #include <sys/systeminfo.h> 3695173954Sek #include <sys/sunddi.h> 37ea8dc4b6Seschrock #ifdef _KERNEL 38ea8dc4b6Seschrock #include <sys/kobj.h> 395679c89fSjv #include <sys/zone.h> 40ea8dc4b6Seschrock #endif 41ea8dc4b6Seschrock 42fa9e4066Sahrens /* 43fa9e4066Sahrens * Pool configuration repository. 44fa9e4066Sahrens * 452f8aaab3Seschrock * Pool configuration is stored as a packed nvlist on the filesystem. By 462f8aaab3Seschrock * default, all pools are stored in /etc/zfs/zpool.cache and loaded on boot 472f8aaab3Seschrock * (when the ZFS module is loaded). Pools can also have the 'cachefile' 482f8aaab3Seschrock * property set that allows them to be stored in an alternate location until 492f8aaab3Seschrock * the control of external software. 50fa9e4066Sahrens * 512f8aaab3Seschrock * For each cache file, we have a single nvlist which holds all the 522f8aaab3Seschrock * configuration information. When the module loads, we read this information 532f8aaab3Seschrock * from /etc/zfs/zpool.cache and populate the SPA namespace. This namespace is 542f8aaab3Seschrock * maintained independently in spa.c. Whenever the namespace is modified, or 552f8aaab3Seschrock * the configuration of a pool is changed, we call spa_config_sync(), which 562f8aaab3Seschrock * walks through all the active pools and writes the configuration to disk. 57fa9e4066Sahrens */ 58fa9e4066Sahrens 59fa9e4066Sahrens static uint64_t spa_config_generation = 1; 60fa9e4066Sahrens 61fa9e4066Sahrens /* 62fa9e4066Sahrens * This can be overridden in userland to preserve an alternate namespace for 63fa9e4066Sahrens * userland pools when doing testing. 64fa9e4066Sahrens */ 65c5904d13Seschrock const char *spa_config_path = ZPOOL_CACHE; 66fa9e4066Sahrens 67fa9e4066Sahrens /* 68fa9e4066Sahrens * Called when the module is first loaded, this routine loads the configuration 69fa9e4066Sahrens * file into the SPA namespace. It does not actually open or load the pools; it 70fa9e4066Sahrens * only populates the namespace. 71fa9e4066Sahrens */ 72fa9e4066Sahrens void 73fa9e4066Sahrens spa_config_load(void) 74fa9e4066Sahrens { 75fa9e4066Sahrens void *buf = NULL; 76fa9e4066Sahrens nvlist_t *nvlist, *child; 77fa9e4066Sahrens nvpair_t *nvpair; 78fa9e4066Sahrens spa_t *spa; 79e14bb325SJeff Bonwick char *pathname; 80ea8dc4b6Seschrock struct _buf *file; 81b1b8ab34Slling uint64_t fsize; 82fa9e4066Sahrens 83fa9e4066Sahrens /* 84fa9e4066Sahrens * Open the configuration file. 85fa9e4066Sahrens */ 86e14bb325SJeff Bonwick pathname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 87e14bb325SJeff Bonwick 88e14bb325SJeff Bonwick (void) snprintf(pathname, MAXPATHLEN, "%s%s", 89c5904d13Seschrock (rootdir != NULL) ? "./" : "", spa_config_path); 90ea8dc4b6Seschrock 91ea8dc4b6Seschrock file = kobj_open_file(pathname); 92e14bb325SJeff Bonwick 93e14bb325SJeff Bonwick kmem_free(pathname, MAXPATHLEN); 94e14bb325SJeff Bonwick 95ea8dc4b6Seschrock if (file == (struct _buf *)-1) 96fa9e4066Sahrens return; 97fa9e4066Sahrens 98b1b8ab34Slling if (kobj_get_filesize(file, &fsize) != 0) 99fa9e4066Sahrens goto out; 100fa9e4066Sahrens 101b1b8ab34Slling buf = kmem_alloc(fsize, KM_SLEEP); 102fa9e4066Sahrens 103ea8dc4b6Seschrock /* 104ea8dc4b6Seschrock * Read the nvlist from the file. 105ea8dc4b6Seschrock */ 106b1b8ab34Slling if (kobj_read_file(file, buf, fsize, 0) < 0) 107fa9e4066Sahrens goto out; 108fa9e4066Sahrens 109fa9e4066Sahrens /* 110fa9e4066Sahrens * Unpack the nvlist. 111fa9e4066Sahrens */ 112b1b8ab34Slling if (nvlist_unpack(buf, fsize, &nvlist, KM_SLEEP) != 0) 113fa9e4066Sahrens goto out; 114fa9e4066Sahrens 115fa9e4066Sahrens /* 116fa9e4066Sahrens * Iterate over all elements in the nvlist, creating a new spa_t for 117fa9e4066Sahrens * each one with the specified configuration. 118fa9e4066Sahrens */ 119fa9e4066Sahrens mutex_enter(&spa_namespace_lock); 120fa9e4066Sahrens nvpair = NULL; 121fa9e4066Sahrens while ((nvpair = nvlist_next_nvpair(nvlist, nvpair)) != NULL) { 122fa9e4066Sahrens 123fa9e4066Sahrens if (nvpair_type(nvpair) != DATA_TYPE_NVLIST) 124fa9e4066Sahrens continue; 125fa9e4066Sahrens 126fa9e4066Sahrens VERIFY(nvpair_value_nvlist(nvpair, &child) == 0); 127fa9e4066Sahrens 128fa9e4066Sahrens if (spa_lookup(nvpair_name(nvpair)) != NULL) 129fa9e4066Sahrens continue; 1300373e76bSbonwick spa = spa_add(nvpair_name(nvpair), NULL); 131fa9e4066Sahrens 132fa9e4066Sahrens /* 133fa9e4066Sahrens * We blindly duplicate the configuration here. If it's 134fa9e4066Sahrens * invalid, we will catch it when the pool is first opened. 135fa9e4066Sahrens */ 136fa9e4066Sahrens VERIFY(nvlist_dup(child, &spa->spa_config, 0) == 0); 137fa9e4066Sahrens } 138fa9e4066Sahrens mutex_exit(&spa_namespace_lock); 139fa9e4066Sahrens 140fa9e4066Sahrens nvlist_free(nvlist); 141fa9e4066Sahrens 142fa9e4066Sahrens out: 143fa9e4066Sahrens if (buf != NULL) 144b1b8ab34Slling kmem_free(buf, fsize); 145fa9e4066Sahrens 146ea8dc4b6Seschrock kobj_close_file(file); 147fa9e4066Sahrens } 148fa9e4066Sahrens 1492f8aaab3Seschrock static void 150c5904d13Seschrock spa_config_write(spa_config_dirent_t *dp, nvlist_t *nvl) 1512f8aaab3Seschrock { 1522f8aaab3Seschrock size_t buflen; 1532f8aaab3Seschrock char *buf; 1542f8aaab3Seschrock vnode_t *vp; 1552f8aaab3Seschrock int oflags = FWRITE | FTRUNC | FCREAT | FOFFMAX; 156e14bb325SJeff Bonwick char *temp; 157c5904d13Seschrock 158c5904d13Seschrock /* 159c5904d13Seschrock * If the nvlist is empty (NULL), then remove the old cachefile. 160c5904d13Seschrock */ 161c5904d13Seschrock if (nvl == NULL) { 162c5904d13Seschrock (void) vn_remove(dp->scd_path, UIO_SYSSPACE, RMFILE); 163c5904d13Seschrock return; 164c5904d13Seschrock } 1652f8aaab3Seschrock 166fa9e4066Sahrens /* 167fa9e4066Sahrens * Pack the configuration into a buffer. 168fa9e4066Sahrens */ 169c5904d13Seschrock VERIFY(nvlist_size(nvl, &buflen, NV_ENCODE_XDR) == 0); 170fa9e4066Sahrens 171fa9e4066Sahrens buf = kmem_alloc(buflen, KM_SLEEP); 172e14bb325SJeff Bonwick temp = kmem_zalloc(MAXPATHLEN, KM_SLEEP); 173fa9e4066Sahrens 174c5904d13Seschrock VERIFY(nvlist_pack(nvl, &buf, &buflen, NV_ENCODE_XDR, 175ea8dc4b6Seschrock KM_SLEEP) == 0); 176fa9e4066Sahrens 177fa9e4066Sahrens /* 178fa9e4066Sahrens * Write the configuration to disk. We need to do the traditional 179fa9e4066Sahrens * 'write to temporary file, sync, move over original' to make sure we 180fa9e4066Sahrens * always have a consistent view of the data. 181fa9e4066Sahrens */ 182e14bb325SJeff Bonwick (void) snprintf(temp, MAXPATHLEN, "%s.tmp", dp->scd_path); 183fa9e4066Sahrens 184e14bb325SJeff Bonwick if (vn_open(temp, UIO_SYSSPACE, oflags, 0644, &vp, CRCREAT, 0) == 0) { 185e14bb325SJeff Bonwick if (vn_rdwr(UIO_WRITE, vp, buf, buflen, 0, UIO_SYSSPACE, 186e14bb325SJeff Bonwick 0, RLIM64_INFINITY, kcred, NULL) == 0 && 187e14bb325SJeff Bonwick VOP_FSYNC(vp, FSYNC, kcred, NULL) == 0) { 188e14bb325SJeff Bonwick (void) vn_rename(temp, dp->scd_path, UIO_SYSSPACE); 189e14bb325SJeff Bonwick } 190e14bb325SJeff Bonwick (void) VOP_CLOSE(vp, oflags, 1, 0, kcred, NULL); 191e14bb325SJeff Bonwick VN_RELE(vp); 192fa9e4066Sahrens } 193fa9e4066Sahrens 194e14bb325SJeff Bonwick (void) vn_remove(temp, UIO_SYSSPACE, RMFILE); 195fa9e4066Sahrens 196fa9e4066Sahrens kmem_free(buf, buflen); 197e14bb325SJeff Bonwick kmem_free(temp, MAXPATHLEN); 1982f8aaab3Seschrock } 1992f8aaab3Seschrock 2002f8aaab3Seschrock /* 201c5904d13Seschrock * Synchronize pool configuration to disk. This must be called with the 202c5904d13Seschrock * namespace lock held. 2032f8aaab3Seschrock */ 2042f8aaab3Seschrock void 205c5904d13Seschrock spa_config_sync(spa_t *target, boolean_t removing, boolean_t postsysevent) 2062f8aaab3Seschrock { 207c5904d13Seschrock spa_config_dirent_t *dp, *tdp; 208c5904d13Seschrock nvlist_t *nvl; 2092f8aaab3Seschrock 2102f8aaab3Seschrock ASSERT(MUTEX_HELD(&spa_namespace_lock)); 2112f8aaab3Seschrock 2129fddc96aSGeorge Wilson if (rootdir == NULL) 2139fddc96aSGeorge Wilson return; 2149fddc96aSGeorge Wilson 215c5904d13Seschrock /* 216c5904d13Seschrock * Iterate over all cachefiles for the pool, past or present. When the 217c5904d13Seschrock * cachefile is changed, the new one is pushed onto this list, allowing 218c5904d13Seschrock * us to update previous cachefiles that no longer contain this pool. 219c5904d13Seschrock */ 220c5904d13Seschrock for (dp = list_head(&target->spa_config_list); dp != NULL; 221c5904d13Seschrock dp = list_next(&target->spa_config_list, dp)) { 222e14bb325SJeff Bonwick spa_t *spa = NULL; 223c5904d13Seschrock if (dp->scd_path == NULL) 224c5904d13Seschrock continue; 225c5904d13Seschrock 226c5904d13Seschrock /* 227c5904d13Seschrock * Iterate over all pools, adding any matching pools to 'nvl'. 228c5904d13Seschrock */ 229c5904d13Seschrock nvl = NULL; 230c5904d13Seschrock while ((spa = spa_next(spa)) != NULL) { 231c5904d13Seschrock if (spa == target && removing) 232c5904d13Seschrock continue; 233c5904d13Seschrock 234e14bb325SJeff Bonwick mutex_enter(&spa->spa_props_lock); 235c5904d13Seschrock tdp = list_head(&spa->spa_config_list); 236e14bb325SJeff Bonwick if (spa->spa_config == NULL || 237e14bb325SJeff Bonwick tdp->scd_path == NULL || 238e14bb325SJeff Bonwick strcmp(tdp->scd_path, dp->scd_path) != 0) { 239e14bb325SJeff Bonwick mutex_exit(&spa->spa_props_lock); 240c5904d13Seschrock continue; 241e14bb325SJeff Bonwick } 242c5904d13Seschrock 243c5904d13Seschrock if (nvl == NULL) 244c5904d13Seschrock VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, 245c5904d13Seschrock KM_SLEEP) == 0); 246c5904d13Seschrock 247c5904d13Seschrock VERIFY(nvlist_add_nvlist(nvl, spa->spa_name, 248c5904d13Seschrock spa->spa_config) == 0); 249e14bb325SJeff Bonwick mutex_exit(&spa->spa_props_lock); 250c5904d13Seschrock } 251c5904d13Seschrock 252c5904d13Seschrock spa_config_write(dp, nvl); 253c5904d13Seschrock nvlist_free(nvl); 254c5904d13Seschrock } 2552f8aaab3Seschrock 2562f8aaab3Seschrock /* 257c5904d13Seschrock * Remove any config entries older than the current one. 2582f8aaab3Seschrock */ 259c5904d13Seschrock dp = list_head(&target->spa_config_list); 260c5904d13Seschrock while ((tdp = list_next(&target->spa_config_list, dp)) != NULL) { 261c5904d13Seschrock list_remove(&target->spa_config_list, tdp); 262c5904d13Seschrock if (tdp->scd_path != NULL) 263c5904d13Seschrock spa_strfree(tdp->scd_path); 264c5904d13Seschrock kmem_free(tdp, sizeof (spa_config_dirent_t)); 2652f8aaab3Seschrock } 2662f8aaab3Seschrock 2672f8aaab3Seschrock spa_config_generation++; 268c5904d13Seschrock 269c5904d13Seschrock if (postsysevent) 270c5904d13Seschrock spa_event_notify(target, NULL, ESC_ZFS_CONFIG_SYNC); 271fa9e4066Sahrens } 272fa9e4066Sahrens 273fa9e4066Sahrens /* 2740373e76bSbonwick * Sigh. Inside a local zone, we don't have access to /etc/zfs/zpool.cache, 275fa9e4066Sahrens * and we don't want to allow the local zone to see all the pools anyway. 276fa9e4066Sahrens * So we have to invent the ZFS_IOC_CONFIG ioctl to grab the configuration 277fa9e4066Sahrens * information for all pool visible within the zone. 278fa9e4066Sahrens */ 279fa9e4066Sahrens nvlist_t * 280fa9e4066Sahrens spa_all_configs(uint64_t *generation) 281fa9e4066Sahrens { 282fa9e4066Sahrens nvlist_t *pools; 283e14bb325SJeff Bonwick spa_t *spa = NULL; 284fa9e4066Sahrens 285fa9e4066Sahrens if (*generation == spa_config_generation) 286fa9e4066Sahrens return (NULL); 287fa9e4066Sahrens 288ea8dc4b6Seschrock VERIFY(nvlist_alloc(&pools, NV_UNIQUE_NAME, KM_SLEEP) == 0); 289fa9e4066Sahrens 290fa9e4066Sahrens mutex_enter(&spa_namespace_lock); 291fa9e4066Sahrens while ((spa = spa_next(spa)) != NULL) { 292fa9e4066Sahrens if (INGLOBALZONE(curproc) || 293fa9e4066Sahrens zone_dataset_visible(spa_name(spa), NULL)) { 294e14bb325SJeff Bonwick mutex_enter(&spa->spa_props_lock); 295fa9e4066Sahrens VERIFY(nvlist_add_nvlist(pools, spa_name(spa), 296fa9e4066Sahrens spa->spa_config) == 0); 297e14bb325SJeff Bonwick mutex_exit(&spa->spa_props_lock); 298fa9e4066Sahrens } 299fa9e4066Sahrens } 300fa9e4066Sahrens *generation = spa_config_generation; 301e14bb325SJeff Bonwick mutex_exit(&spa_namespace_lock); 302fa9e4066Sahrens 303fa9e4066Sahrens return (pools); 304fa9e4066Sahrens } 305fa9e4066Sahrens 306fa9e4066Sahrens void 307fa9e4066Sahrens spa_config_set(spa_t *spa, nvlist_t *config) 308fa9e4066Sahrens { 309e14bb325SJeff Bonwick mutex_enter(&spa->spa_props_lock); 310fa9e4066Sahrens if (spa->spa_config != NULL) 311fa9e4066Sahrens nvlist_free(spa->spa_config); 312fa9e4066Sahrens spa->spa_config = config; 313e14bb325SJeff Bonwick mutex_exit(&spa->spa_props_lock); 314fa9e4066Sahrens } 315fa9e4066Sahrens 316fa9e4066Sahrens /* 317fa9e4066Sahrens * Generate the pool's configuration based on the current in-core state. 318fa9e4066Sahrens * We infer whether to generate a complete config or just one top-level config 319fa9e4066Sahrens * based on whether vd is the root vdev. 320fa9e4066Sahrens */ 321fa9e4066Sahrens nvlist_t * 322fa9e4066Sahrens spa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg, int getstats) 323fa9e4066Sahrens { 324fa9e4066Sahrens nvlist_t *config, *nvroot; 325fa9e4066Sahrens vdev_t *rvd = spa->spa_root_vdev; 32695173954Sek unsigned long hostid = 0; 327e14bb325SJeff Bonwick boolean_t locked = B_FALSE; 328fa9e4066Sahrens 329e14bb325SJeff Bonwick if (vd == NULL) { 330fa9e4066Sahrens vd = rvd; 331e14bb325SJeff Bonwick locked = B_TRUE; 332e14bb325SJeff Bonwick spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); 333e14bb325SJeff Bonwick } 334e14bb325SJeff Bonwick 335e14bb325SJeff Bonwick ASSERT(spa_config_held(spa, SCL_CONFIG | SCL_STATE, RW_READER) == 336e14bb325SJeff Bonwick (SCL_CONFIG | SCL_STATE)); 337fa9e4066Sahrens 338fa9e4066Sahrens /* 339fa9e4066Sahrens * If txg is -1, report the current value of spa->spa_config_txg. 340fa9e4066Sahrens */ 341fa9e4066Sahrens if (txg == -1ULL) 342fa9e4066Sahrens txg = spa->spa_config_txg; 343fa9e4066Sahrens 344ea8dc4b6Seschrock VERIFY(nvlist_alloc(&config, NV_UNIQUE_NAME, KM_SLEEP) == 0); 345fa9e4066Sahrens 346fa9e4066Sahrens VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 34799653d4eSeschrock spa_version(spa)) == 0); 348fa9e4066Sahrens VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, 349fa9e4066Sahrens spa_name(spa)) == 0); 350fa9e4066Sahrens VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 351fa9e4066Sahrens spa_state(spa)) == 0); 352fa9e4066Sahrens VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG, 353fa9e4066Sahrens txg) == 0); 354fa9e4066Sahrens VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID, 355fa9e4066Sahrens spa_guid(spa)) == 0); 3565679c89fSjv #ifdef _KERNEL 3575679c89fSjv hostid = zone_get_hostid(NULL); 3585679c89fSjv #else /* _KERNEL */ 3595679c89fSjv /* 3605679c89fSjv * We're emulating the system's hostid in userland, so we can't use 3615679c89fSjv * zone_get_hostid(). 3625679c89fSjv */ 36395173954Sek (void) ddi_strtoul(hw_serial, NULL, 10, &hostid); 3645679c89fSjv #endif /* _KERNEL */ 36517194a52Slling if (hostid != 0) { 36617194a52Slling VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_HOSTID, 3678654d025Sperrin hostid) == 0); 36817194a52Slling } 36995173954Sek VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_HOSTNAME, 37095173954Sek utsname.nodename) == 0); 371fa9e4066Sahrens 372fa9e4066Sahrens if (vd != rvd) { 373fa9e4066Sahrens VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TOP_GUID, 374fa9e4066Sahrens vd->vdev_top->vdev_guid) == 0); 375fa9e4066Sahrens VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_GUID, 376fa9e4066Sahrens vd->vdev_guid) == 0); 37799653d4eSeschrock if (vd->vdev_isspare) 37899653d4eSeschrock VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_IS_SPARE, 37999653d4eSeschrock 1ULL) == 0); 3808654d025Sperrin if (vd->vdev_islog) 3818654d025Sperrin VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_IS_LOG, 3828654d025Sperrin 1ULL) == 0); 383fa9e4066Sahrens vd = vd->vdev_top; /* label contains top config */ 384fa9e4066Sahrens } 385fa9e4066Sahrens 386fa94a07fSbrendan nvroot = vdev_config_generate(spa, vd, getstats, B_FALSE, B_FALSE); 387fa9e4066Sahrens VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); 388fa9e4066Sahrens nvlist_free(nvroot); 389fa9e4066Sahrens 390e14bb325SJeff Bonwick if (locked) 391e14bb325SJeff Bonwick spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 392e14bb325SJeff Bonwick 393fa9e4066Sahrens return (config); 394fa9e4066Sahrens } 3950373e76bSbonwick 3960373e76bSbonwick /* 397e7cbe64fSgw * For a pool that's not currently a booting rootpool, update all disk labels, 398e7cbe64fSgw * generate a fresh config based on the current in-core state, and sync the 399e7cbe64fSgw * global config cache. 4000373e76bSbonwick */ 4010373e76bSbonwick void 4020373e76bSbonwick spa_config_update(spa_t *spa, int what) 403e7cbe64fSgw { 404e7cbe64fSgw spa_config_update_common(spa, what, FALSE); 405e7cbe64fSgw } 406e7cbe64fSgw 407e7cbe64fSgw /* 408e7cbe64fSgw * Update all disk labels, generate a fresh config based on the current 409e7cbe64fSgw * in-core state, and sync the global config cache (do not sync the config 410e7cbe64fSgw * cache if this is a booting rootpool). 411e7cbe64fSgw */ 412e7cbe64fSgw void 413e7cbe64fSgw spa_config_update_common(spa_t *spa, int what, boolean_t isroot) 4140373e76bSbonwick { 4150373e76bSbonwick vdev_t *rvd = spa->spa_root_vdev; 4160373e76bSbonwick uint64_t txg; 4170373e76bSbonwick int c; 4180373e76bSbonwick 4190373e76bSbonwick ASSERT(MUTEX_HELD(&spa_namespace_lock)); 4200373e76bSbonwick 421e14bb325SJeff Bonwick spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 4220373e76bSbonwick txg = spa_last_synced_txg(spa) + 1; 4230373e76bSbonwick if (what == SPA_CONFIG_UPDATE_POOL) { 4240373e76bSbonwick vdev_config_dirty(rvd); 4250373e76bSbonwick } else { 4260373e76bSbonwick /* 4270373e76bSbonwick * If we have top-level vdevs that were added but have 4280373e76bSbonwick * not yet been prepared for allocation, do that now. 4290373e76bSbonwick * (It's safe now because the config cache is up to date, 4300373e76bSbonwick * so it will be able to translate the new DVAs.) 4310373e76bSbonwick * See comments in spa_vdev_add() for full details. 4320373e76bSbonwick */ 4330373e76bSbonwick for (c = 0; c < rvd->vdev_children; c++) { 4340373e76bSbonwick vdev_t *tvd = rvd->vdev_child[c]; 435*573ca77eSGeorge Wilson if (tvd->vdev_ms_array == 0) 436*573ca77eSGeorge Wilson vdev_metaslab_set_size(tvd); 437*573ca77eSGeorge Wilson vdev_expand(tvd, txg); 4380373e76bSbonwick } 4390373e76bSbonwick } 440e14bb325SJeff Bonwick spa_config_exit(spa, SCL_ALL, FTAG); 4410373e76bSbonwick 4420373e76bSbonwick /* 4430373e76bSbonwick * Wait for the mosconfig to be regenerated and synced. 4440373e76bSbonwick */ 4450373e76bSbonwick txg_wait_synced(spa->spa_dsl_pool, txg); 4460373e76bSbonwick 4470373e76bSbonwick /* 4480373e76bSbonwick * Update the global config cache to reflect the new mosconfig. 4490373e76bSbonwick */ 450e7cbe64fSgw if (!isroot) 451c5904d13Seschrock spa_config_sync(spa, B_FALSE, what != SPA_CONFIG_UPDATE_POOL); 4520373e76bSbonwick 4530373e76bSbonwick if (what == SPA_CONFIG_UPDATE_POOL) 454e7cbe64fSgw spa_config_update_common(spa, SPA_CONFIG_UPDATE_VDEVS, isroot); 4550373e76bSbonwick } 456