1145516Sdarrenr/* 2145516Sdarrenr * CDDL HEADER START 3145516Sdarrenr * 4255332Scy * The contents of this file are subject to the terms of the 5145516Sdarrenr * Common Development and Distribution License (the "License"). 6145516Sdarrenr * You may not use this file except in compliance with the License. 7145516Sdarrenr * 8145516Sdarrenr * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9145516Sdarrenr * or http://www.opensolaris.org/os/licensing. 10255332Scy * See the License for the specific language governing permissions 11145516Sdarrenr * and limitations under the License. 12145516Sdarrenr * 13145516Sdarrenr * When distributing Covered Code, include this CDDL HEADER in each 14145516Sdarrenr * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15145516Sdarrenr * If applicable, add the following below this CDDL HEADER, with the 16145516Sdarrenr * fields enclosed by brackets "[]" replaced with your own identifying 17145516Sdarrenr * information: Portions Copyright [yyyy] [name of copyright owner] 18145516Sdarrenr * 19145516Sdarrenr * CDDL HEADER END 20145516Sdarrenr */ 21145516Sdarrenr 22145516Sdarrenr/* 23145516Sdarrenr * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24145516Sdarrenr * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 25145516Sdarrenr * Copyright (c) 2013 by Delphix. All rights reserved. 26145516Sdarrenr */ 27145516Sdarrenr 28145516Sdarrenr#include <sys/zfs_context.h> 29145516Sdarrenr#include <sys/spa.h> 30145516Sdarrenr#include <sys/fm/fs/zfs.h> 31145516Sdarrenr#include <sys/spa_impl.h> 32145516Sdarrenr#include <sys/nvpair.h> 33145516Sdarrenr#include <sys/uio.h> 34145516Sdarrenr#include <sys/fs/zfs.h> 35145516Sdarrenr#include <sys/vdev_impl.h> 36255332Scy#include <sys/zfs_ioctl.h> 37255332Scy#include <sys/utsname.h> 38145516Sdarrenr#include <sys/sunddi.h> 39145516Sdarrenr#include <sys/zfeature.h> 40145516Sdarrenr#ifdef _KERNEL 41145516Sdarrenr#include <sys/kobj.h> 42170268Sdarrenr#include <sys/zone.h> 43195699Srwatson#endif 44145516Sdarrenr 45145516Sdarrenr/* 46145516Sdarrenr * Pool configuration repository. 47170268Sdarrenr * 48145516Sdarrenr * Pool configuration is stored as a packed nvlist on the filesystem. By 49145516Sdarrenr * default, all pools are stored in /etc/zfs/zpool.cache and loaded on boot 50145516Sdarrenr * (when the ZFS module is loaded). Pools can also have the 'cachefile' 51145516Sdarrenr * property set that allows them to be stored in an alternate location until 52145516Sdarrenr * the control of external software. 53145516Sdarrenr * 54145516Sdarrenr * For each cache file, we have a single nvlist which holds all the 55145516Sdarrenr * configuration information. When the module loads, we read this information 56145516Sdarrenr * from /etc/zfs/zpool.cache and populate the SPA namespace. This namespace is 57145516Sdarrenr * maintained independently in spa.c. Whenever the namespace is modified, or 58145516Sdarrenr * the configuration of a pool is changed, we call spa_config_sync(), which 59145516Sdarrenr * walks through all the active pools and writes the configuration to disk. 60145516Sdarrenr */ 61145516Sdarrenr 62145516Sdarrenrstatic uint64_t spa_config_generation = 1; 63145516Sdarrenr 64145516Sdarrenr/* 65145516Sdarrenr * This can be overridden in userland to preserve an alternate namespace for 66145516Sdarrenr * userland pools when doing testing. 67145516Sdarrenr */ 68145516Sdarrenrconst char *spa_config_path = ZPOOL_CACHE; 69145516Sdarrenr 70145516Sdarrenr/* 71145516Sdarrenr * Called when the module is first loaded, this routine loads the configuration 72255332Scy * file into the SPA namespace. It does not actually open or load the pools; it 73255332Scy * only populates the namespace. 74145516Sdarrenr */ 75145516Sdarrenrvoid 76145516Sdarrenrspa_config_load(void) 77145516Sdarrenr{ 78145516Sdarrenr void *buf = NULL; 79145516Sdarrenr nvlist_t *nvlist, *child; 80145516Sdarrenr nvpair_t *nvpair; 81145516Sdarrenr char *pathname; 82145516Sdarrenr struct _buf *file; 83145516Sdarrenr uint64_t fsize; 84145516Sdarrenr 85145516Sdarrenr /* 86145516Sdarrenr * Open the configuration file. 87151897Srwatson */ 88145516Sdarrenr pathname = kmem_alloc(MAXPATHLEN, KM_SLEEP); 89145516Sdarrenr 90145516Sdarrenr (void) snprintf(pathname, MAXPATHLEN, "%s", spa_config_path); 91255332Scy 92255332Scy file = kobj_open_file(pathname); 93255332Scy 94255332Scy kmem_free(pathname, MAXPATHLEN); 95145516Sdarrenr 96145516Sdarrenr if (file == (struct _buf *)-1) 97255332Scy return; 98145516Sdarrenr 99145516Sdarrenr if (kobj_get_filesize(file, &fsize) != 0) 100145516Sdarrenr goto out; 101145516Sdarrenr 102255332Scy buf = kmem_alloc(fsize, KM_SLEEP); 103145516Sdarrenr 104255332Scy /* 105145516Sdarrenr * Read the nvlist from the file. 106255332Scy */ 107145516Sdarrenr if (kobj_read_file(file, buf, fsize, 0) < 0) 108145516Sdarrenr goto out; 109153876Sguido 110153876Sguido /* 111153876Sguido * Unpack the nvlist. 112153876Sguido */ 113153876Sguido if (nvlist_unpack(buf, fsize, &nvlist, KM_SLEEP) != 0) 114255332Scy goto out; 115153876Sguido 116255332Scy /* 117153876Sguido * Iterate over all elements in the nvlist, creating a new spa_t for 118153876Sguido * each one with the specified configuration. 119153876Sguido */ 120145516Sdarrenr mutex_enter(&spa_namespace_lock); 121145516Sdarrenr nvpair = NULL; 122255332Scy while ((nvpair = nvlist_next_nvpair(nvlist, nvpair)) != NULL) { 123145516Sdarrenr if (nvpair_type(nvpair) != DATA_TYPE_NVLIST) 124145516Sdarrenr continue; 125255332Scy 126255332Scy VERIFY(nvpair_value_nvlist(nvpair, &child) == 0); 127255332Scy 128255332Scy if (spa_lookup(nvpair_name(nvpair)) != NULL) 129255332Scy continue; 130255332Scy (void) spa_add(nvpair_name(nvpair), child, NULL); 131255332Scy } 132255332Scy mutex_exit(&spa_namespace_lock); 133255332Scy 134255332Scy nvlist_free(nvlist); 135255332Scy 136255332Scyout: 137255332Scy if (buf != NULL) 138255332Scy kmem_free(buf, fsize); 139255332Scy 140255332Scy kobj_close_file(file); 141255332Scy} 142255332Scy 143255332Scystatic int 144145516Sdarrenrspa_config_write(spa_config_dirent_t *dp, nvlist_t *nvl) 145145516Sdarrenr{ 146145516Sdarrenr size_t buflen; 147145516Sdarrenr char *buf; 148145516Sdarrenr vnode_t *vp; 149145516Sdarrenr int oflags = FWRITE | FTRUNC | FCREAT | FOFFMAX; 150255332Scy char *temp; 151145516Sdarrenr int err; 152255332Scy 153255332Scy /* 154145516Sdarrenr * If the nvlist is empty (NULL), then remove the old cachefile. 155145516Sdarrenr */ 156145516Sdarrenr if (nvl == NULL) { 157255332Scy err = vn_remove(dp->scd_path, UIO_SYSSPACE, RMFILE); 158255332Scy return (err); 159145516Sdarrenr } 160145516Sdarrenr 161145516Sdarrenr /* 162145516Sdarrenr * Pack the configuration into a buffer. 163145516Sdarrenr */ 164145516Sdarrenr VERIFY(nvlist_size(nvl, &buflen, NV_ENCODE_XDR) == 0); 165145516Sdarrenr 166145516Sdarrenr buf = kmem_alloc(buflen, KM_SLEEP); 167255332Scy temp = kmem_zalloc(MAXPATHLEN, KM_SLEEP); 168255332Scy 169255332Scy VERIFY(nvlist_pack(nvl, &buf, &buflen, NV_ENCODE_XDR, 170145516Sdarrenr KM_SLEEP) == 0); 171255332Scy 172255332Scy /* 173255332Scy * Write the configuration to disk. We need to do the traditional 174255332Scy * 'write to temporary file, sync, move over original' to make sure we 175255332Scy * always have a consistent view of the data. 176255332Scy */ 177255332Scy (void) snprintf(temp, MAXPATHLEN, "%s.tmp", dp->scd_path); 178255332Scy 179255332Scy err = vn_open(temp, UIO_SYSSPACE, oflags, 0644, &vp, CRCREAT, 0); 180255332Scy if (err == 0) { 181255332Scy err = vn_rdwr(UIO_WRITE, vp, buf, buflen, 0, UIO_SYSSPACE, 182255332Scy 0, RLIM64_INFINITY, kcred, NULL); 183255332Scy if (err == 0) 184255332Scy err = VOP_FSYNC(vp, FSYNC, kcred, NULL); 185255332Scy if (err == 0) 186255332Scy err = vn_rename(temp, dp->scd_path, UIO_SYSSPACE); 187255332Scy (void) VOP_CLOSE(vp, oflags, 1, 0, kcred, NULL); 188255332Scy } 189255332Scy 190255332Scy (void) vn_remove(temp, UIO_SYSSPACE, RMFILE); 191255332Scy 192255332Scy kmem_free(buf, buflen); 193255332Scy kmem_free(temp, MAXPATHLEN); 194255332Scy return (err); 195255332Scy} 196145516Sdarrenr 197145516Sdarrenr/* 198145516Sdarrenr * Synchronize pool configuration to disk. This must be called with the 199145516Sdarrenr * namespace lock held. Synchronizing the pool cache is typically done after 200145516Sdarrenr * the configuration has been synced to the MOS. This exposes a window where 201255332Scy * the MOS config will have been updated but the cache file has not. If 202145516Sdarrenr * the system were to crash at that instant then the cached config may not 203145516Sdarrenr * contain the correct information to open the pool and an explicity import 204145516Sdarrenr * would be required. 205145516Sdarrenr */ 206255332Scyvoid 207145516Sdarrenrspa_config_sync(spa_t *target, boolean_t removing, boolean_t postsysevent) 208145516Sdarrenr{ 209145516Sdarrenr spa_config_dirent_t *dp, *tdp; 210145516Sdarrenr nvlist_t *nvl; 211145516Sdarrenr boolean_t ccw_failure; 212255332Scy int error; 213255332Scy 214255332Scy ASSERT(MUTEX_HELD(&spa_namespace_lock)); 215145516Sdarrenr 216145516Sdarrenr if (rootdir == NULL || !(spa_mode_global & FWRITE)) 217255332Scy return; 218255332Scy 219145516Sdarrenr /* 220255332Scy * Iterate over all cachefiles for the pool, past or present. When the 221181803Sbz * cachefile is changed, the new one is pushed onto this list, allowing 222145516Sdarrenr * us to update previous cachefiles that no longer contain this pool. 223255332Scy */ 224255332Scy ccw_failure = B_FALSE; 225145516Sdarrenr for (dp = list_head(&target->spa_config_list); dp != NULL; 226255332Scy dp = list_next(&target->spa_config_list, dp)) { 227255332Scy spa_t *spa = NULL; 228145516Sdarrenr if (dp->scd_path == NULL) 229145516Sdarrenr continue; 230145516Sdarrenr 231145516Sdarrenr /* 232145516Sdarrenr * Iterate over all pools, adding any matching pools to 'nvl'. 233145516Sdarrenr */ 234145516Sdarrenr nvl = NULL; 235145516Sdarrenr while ((spa = spa_next(spa)) != NULL) { 236255332Scy /* 237255332Scy * Skip over our own pool if we're about to remove 238255332Scy * ourselves from the spa namespace or any pool that 239145516Sdarrenr * is readonly. Since we cannot guarantee that a 240145516Sdarrenr * readonly pool would successfully import upon reboot, 241145516Sdarrenr * we don't allow them to be written to the cache file. 242145516Sdarrenr */ 243255332Scy if ((spa == target && removing) || 244255332Scy !spa_writeable(spa)) 245181803Sbz continue; 246145516Sdarrenr 247145516Sdarrenr mutex_enter(&spa->spa_props_lock); 248145516Sdarrenr tdp = list_head(&spa->spa_config_list); 249255332Scy if (spa->spa_config == NULL || 250255332Scy tdp->scd_path == NULL || 251255332Scy strcmp(tdp->scd_path, dp->scd_path) != 0) { 252145516Sdarrenr mutex_exit(&spa->spa_props_lock); 253145516Sdarrenr continue; 254255332Scy } 255255332Scy 256255332Scy if (nvl == NULL) 257145516Sdarrenr VERIFY(nvlist_alloc(&nvl, NV_UNIQUE_NAME, 258145516Sdarrenr KM_SLEEP) == 0); 259255332Scy 260145516Sdarrenr VERIFY(nvlist_add_nvlist(nvl, spa->spa_name, 261255332Scy spa->spa_config) == 0); 262145516Sdarrenr mutex_exit(&spa->spa_props_lock); 263145516Sdarrenr } 264145516Sdarrenr 265145516Sdarrenr error = spa_config_write(dp, nvl); 266145516Sdarrenr if (error != 0) 267145516Sdarrenr ccw_failure = B_TRUE; 268145516Sdarrenr nvlist_free(nvl); 269145516Sdarrenr } 270145516Sdarrenr 271145516Sdarrenr if (ccw_failure) { 272255332Scy /* 273255332Scy * Keep trying so that configuration data is 274145516Sdarrenr * written if/when any temporary filesystem 275255332Scy * resource issues are resolved. 276192895Sjamie */ 277170268Sdarrenr if (target->spa_ccw_fail_time == 0) { 278255332Scy zfs_ereport_post(FM_EREPORT_ZFS_CONFIG_CACHE_WRITE, 279255332Scy target, NULL, NULL, 0, 0); 280255332Scy } 281255332Scy target->spa_ccw_fail_time = gethrtime(); 282145516Sdarrenr spa_async_request(target, SPA_ASYNC_CONFIG_UPDATE); 283170268Sdarrenr } else { 284170268Sdarrenr /* 285145516Sdarrenr * Do not rate limit future attempts to update 286255332Scy * the config cache. 287255332Scy */ 288255332Scy target->spa_ccw_fail_time = 0; 289255332Scy } 290145516Sdarrenr 291255332Scy /* 292145516Sdarrenr * Remove any config entries older than the current one. 293145516Sdarrenr */ 294145516Sdarrenr dp = list_head(&target->spa_config_list); 295255332Scy while ((tdp = list_next(&target->spa_config_list, dp)) != NULL) { 296255332Scy list_remove(&target->spa_config_list, tdp); 297145516Sdarrenr if (tdp->scd_path != NULL) 298255332Scy spa_strfree(tdp->scd_path); 299145516Sdarrenr kmem_free(tdp, sizeof (spa_config_dirent_t)); 300255332Scy } 301255332Scy 302255332Scy spa_config_generation++; 303145516Sdarrenr 304255332Scy if (postsysevent) 305145516Sdarrenr spa_event_notify(target, NULL, ESC_ZFS_CONFIG_SYNC); 306173181Sdarrenr} 307255332Scy 308255332Scy/* 309255332Scy * Sigh. Inside a local zone, we don't have access to /etc/zfs/zpool.cache, 310145516Sdarrenr * and we don't want to allow the local zone to see all the pools anyway. 311255332Scy * So we have to invent the ZFS_IOC_CONFIG ioctl to grab the configuration 312145516Sdarrenr * information for all pool visible within the zone. 313145516Sdarrenr */ 314145516Sdarrenrnvlist_t * 315145516Sdarrenrspa_all_configs(uint64_t *generation) 316255332Scy{ 317145516Sdarrenr nvlist_t *pools; 318145516Sdarrenr spa_t *spa = NULL; 319145516Sdarrenr 320145516Sdarrenr if (*generation == spa_config_generation) 321145516Sdarrenr return (NULL); 322145516Sdarrenr 323161356Sguido VERIFY(nvlist_alloc(&pools, NV_UNIQUE_NAME, KM_SLEEP) == 0); 324145516Sdarrenr 325145516Sdarrenr mutex_enter(&spa_namespace_lock); 326145516Sdarrenr while ((spa = spa_next(spa)) != NULL) { 327145516Sdarrenr if (INGLOBALZONE(curthread) || 328145516Sdarrenr zone_dataset_visible(spa_name(spa), NULL)) { 329255332Scy mutex_enter(&spa->spa_props_lock); 330145516Sdarrenr VERIFY(nvlist_add_nvlist(pools, spa_name(spa), 331145516Sdarrenr spa->spa_config) == 0); 332255332Scy mutex_exit(&spa->spa_props_lock); 333255332Scy } 334255332Scy } 335145516Sdarrenr *generation = spa_config_generation; 336145516Sdarrenr mutex_exit(&spa_namespace_lock); 337145516Sdarrenr 338145516Sdarrenr return (pools); 339145516Sdarrenr} 340145516Sdarrenr 341145516Sdarrenrvoid 342145516Sdarrenrspa_config_set(spa_t *spa, nvlist_t *config) 343145516Sdarrenr{ 344145516Sdarrenr mutex_enter(&spa->spa_props_lock); 345145516Sdarrenr if (spa->spa_config != NULL) 346145516Sdarrenr nvlist_free(spa->spa_config); 347145516Sdarrenr spa->spa_config = config; 348255332Scy mutex_exit(&spa->spa_props_lock); 349145516Sdarrenr} 350145516Sdarrenr 351145516Sdarrenr/* 352145516Sdarrenr * Generate the pool's configuration based on the current in-core state. 353145516Sdarrenr * 354145516Sdarrenr * We infer whether to generate a complete config or just one top-level config 355145516Sdarrenr * based on whether vd is the root vdev. 356145516Sdarrenr */ 357145516Sdarrenrnvlist_t * 358145516Sdarrenrspa_config_generate(spa_t *spa, vdev_t *vd, uint64_t txg, int getstats) 359145516Sdarrenr{ 360145516Sdarrenr nvlist_t *config, *nvroot; 361145516Sdarrenr vdev_t *rvd = spa->spa_root_vdev; 362145516Sdarrenr unsigned long hostid = 0; 363145516Sdarrenr boolean_t locked = B_FALSE; 364145516Sdarrenr uint64_t split_guid; 365145516Sdarrenr 366145516Sdarrenr if (vd == NULL) { 367145516Sdarrenr vd = rvd; 368145516Sdarrenr locked = B_TRUE; 369145516Sdarrenr spa_config_enter(spa, SCL_CONFIG | SCL_STATE, FTAG, RW_READER); 370145516Sdarrenr } 371145516Sdarrenr 372145516Sdarrenr ASSERT(spa_config_held(spa, SCL_CONFIG | SCL_STATE, RW_READER) == 373145516Sdarrenr (SCL_CONFIG | SCL_STATE)); 374145516Sdarrenr 375145516Sdarrenr /* 376145516Sdarrenr * If txg is -1, report the current value of spa->spa_config_txg. 377145516Sdarrenr */ 378145516Sdarrenr if (txg == -1ULL) 379145516Sdarrenr txg = spa->spa_config_txg; 380145516Sdarrenr 381145516Sdarrenr VERIFY(nvlist_alloc(&config, NV_UNIQUE_NAME, KM_SLEEP) == 0); 382145516Sdarrenr 383145516Sdarrenr VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_VERSION, 384145516Sdarrenr spa_version(spa)) == 0); 385145516Sdarrenr VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_POOL_NAME, 386145516Sdarrenr spa_name(spa)) == 0); 387145516Sdarrenr VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_STATE, 388145516Sdarrenr spa_state(spa)) == 0); 389145516Sdarrenr VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_TXG, 390145516Sdarrenr txg) == 0); 391145516Sdarrenr VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_POOL_GUID, 392145516Sdarrenr spa_guid(spa)) == 0); 393145516Sdarrenr VERIFY(spa->spa_comment == NULL || nvlist_add_string(config, 394145516Sdarrenr ZPOOL_CONFIG_COMMENT, spa->spa_comment) == 0); 395145516Sdarrenr 396145516Sdarrenr 397145516Sdarrenr#ifdef _KERNEL 398145516Sdarrenr hostid = zone_get_hostid(NULL); 399145516Sdarrenr#else /* _KERNEL */ 400145516Sdarrenr /* 401145516Sdarrenr * We're emulating the system's hostid in userland, so we can't use 402145516Sdarrenr * zone_get_hostid(). 403145516Sdarrenr */ 404145516Sdarrenr (void) ddi_strtoul(hw_serial, NULL, 10, &hostid); 405145516Sdarrenr#endif /* _KERNEL */ 406145516Sdarrenr if (hostid != 0) { 407145516Sdarrenr VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_HOSTID, 408145516Sdarrenr hostid) == 0); 409145516Sdarrenr } 410145516Sdarrenr VERIFY(nvlist_add_string(config, ZPOOL_CONFIG_HOSTNAME, 411145516Sdarrenr utsname.nodename) == 0); 412145516Sdarrenr 413255332Scy if (vd != rvd) { 414255332Scy VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_TOP_GUID, 415145516Sdarrenr vd->vdev_top->vdev_guid) == 0); 416145516Sdarrenr VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_GUID, 417255332Scy vd->vdev_guid) == 0); 418145516Sdarrenr if (vd->vdev_isspare) 419145516Sdarrenr VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_IS_SPARE, 420145516Sdarrenr 1ULL) == 0); 421145516Sdarrenr if (vd->vdev_islog) 422145516Sdarrenr VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_IS_LOG, 423145516Sdarrenr 1ULL) == 0); 424145516Sdarrenr vd = vd->vdev_top; /* label contains top config */ 425255332Scy } else { 426255332Scy /* 427145516Sdarrenr * Only add the (potentially large) split information 428145516Sdarrenr * in the mos config, and not in the vdev labels 429145516Sdarrenr */ 430255332Scy if (spa->spa_config_splitting != NULL) 431255332Scy VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_SPLIT, 432255332Scy spa->spa_config_splitting) == 0); 433255332Scy } 434255332Scy 435255332Scy /* 436255332Scy * Add the top-level config. We even add this on pools which 437145516Sdarrenr * don't support holes in the namespace. 438145516Sdarrenr */ 439145516Sdarrenr vdev_top_config_generate(spa, config); 440145516Sdarrenr 441145516Sdarrenr /* 442145516Sdarrenr * If we're splitting, record the original pool's guid. 443145516Sdarrenr */ 444255332Scy if (spa->spa_config_splitting != NULL && 445145516Sdarrenr nvlist_lookup_uint64(spa->spa_config_splitting, 446145516Sdarrenr ZPOOL_CONFIG_SPLIT_GUID, &split_guid) == 0) { 447145516Sdarrenr VERIFY(nvlist_add_uint64(config, ZPOOL_CONFIG_SPLIT_GUID, 448145516Sdarrenr split_guid) == 0); 449145516Sdarrenr } 450255332Scy 451255332Scy nvroot = vdev_config_generate(spa, vd, getstats, 0); 452145516Sdarrenr VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0); 453255332Scy nvlist_free(nvroot); 454255332Scy 455145516Sdarrenr /* 456145516Sdarrenr * Store what's necessary for reading the MOS in the label. 457145516Sdarrenr */ 458255332Scy VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_FEATURES_FOR_READ, 459255332Scy spa->spa_label_features) == 0); 460145516Sdarrenr 461145516Sdarrenr if (getstats && spa_load_state(spa) == SPA_LOAD_NONE) { 462145516Sdarrenr ddt_histogram_t *ddh; 463181803Sbz ddt_stat_t *dds; 464145516Sdarrenr ddt_object_t *ddo; 465145516Sdarrenr 466145516Sdarrenr ddh = kmem_zalloc(sizeof (ddt_histogram_t), KM_SLEEP); 467145516Sdarrenr ddt_get_dedup_histogram(spa, ddh); 468145516Sdarrenr VERIFY(nvlist_add_uint64_array(config, 469145516Sdarrenr ZPOOL_CONFIG_DDT_HISTOGRAM, 470145516Sdarrenr (uint64_t *)ddh, sizeof (*ddh) / sizeof (uint64_t)) == 0); 471145516Sdarrenr kmem_free(ddh, sizeof (ddt_histogram_t)); 472145516Sdarrenr 473145516Sdarrenr ddo = kmem_zalloc(sizeof (ddt_object_t), KM_SLEEP); 474255332Scy ddt_get_dedup_object_stats(spa, ddo); 475255332Scy VERIFY(nvlist_add_uint64_array(config, 476145516Sdarrenr ZPOOL_CONFIG_DDT_OBJ_STATS, 477255332Scy (uint64_t *)ddo, sizeof (*ddo) / sizeof (uint64_t)) == 0); 478145516Sdarrenr kmem_free(ddo, sizeof (ddt_object_t)); 479145516Sdarrenr 480145516Sdarrenr dds = kmem_zalloc(sizeof (ddt_stat_t), KM_SLEEP); 481145516Sdarrenr ddt_get_dedup_stats(spa, dds); 482145516Sdarrenr VERIFY(nvlist_add_uint64_array(config, 483145516Sdarrenr ZPOOL_CONFIG_DDT_STATS, 484145516Sdarrenr (uint64_t *)dds, sizeof (*dds) / sizeof (uint64_t)) == 0); 485145516Sdarrenr kmem_free(dds, sizeof (ddt_stat_t)); 486145516Sdarrenr } 487145516Sdarrenr 488145516Sdarrenr if (locked) 489145516Sdarrenr spa_config_exit(spa, SCL_CONFIG | SCL_STATE, FTAG); 490145516Sdarrenr 491145516Sdarrenr return (config); 492255332Scy} 493145516Sdarrenr 494145516Sdarrenr/* 495255332Scy * Update all disk labels, generate a fresh config based on the current 496145516Sdarrenr * in-core state, and sync the global config cache (do not sync the config 497255332Scy * cache if this is a booting rootpool). 498145516Sdarrenr */ 499145516Sdarrenrvoid 500145516Sdarrenrspa_config_update(spa_t *spa, int what) 501255332Scy{ 502255332Scy vdev_t *rvd = spa->spa_root_vdev; 503255332Scy uint64_t txg; 504255332Scy int c; 505255332Scy 506145516Sdarrenr ASSERT(MUTEX_HELD(&spa_namespace_lock)); 507145516Sdarrenr 508145516Sdarrenr spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 509145516Sdarrenr txg = spa_last_synced_txg(spa) + 1; 510145516Sdarrenr if (what == SPA_CONFIG_UPDATE_POOL) { 511255332Scy vdev_config_dirty(rvd); 512145516Sdarrenr } else { 513145516Sdarrenr /* 514145516Sdarrenr * If we have top-level vdevs that were added but have 515145516Sdarrenr * not yet been prepared for allocation, do that now. 516145516Sdarrenr * (It's safe now because the config cache is up to date, 517145516Sdarrenr * so it will be able to translate the new DVAs.) 518172776Sdarrenr * See comments in spa_vdev_add() for full details. 519145516Sdarrenr */ 520145516Sdarrenr for (c = 0; c < rvd->vdev_children; c++) { 521145516Sdarrenr vdev_t *tvd = rvd->vdev_child[c]; 522145516Sdarrenr if (tvd->vdev_ms_array == 0) { 523255332Scy vdev_ashift_optimize(tvd); 524255332Scy vdev_metaslab_set_size(tvd); 525255332Scy } 526255332Scy vdev_expand(tvd, txg); 527255332Scy } 528255332Scy } 529255332Scy spa_config_exit(spa, SCL_ALL, FTAG); 530145516Sdarrenr 531145516Sdarrenr /* 532145516Sdarrenr * Wait for the mosconfig to be regenerated and synced. 533255332Scy */ 534145516Sdarrenr txg_wait_synced(spa->spa_dsl_pool, txg); 535145516Sdarrenr 536145516Sdarrenr /* 537145516Sdarrenr * Update the global config cache to reflect the new mosconfig. 538145516Sdarrenr */ 539145516Sdarrenr if (!spa->spa_is_root) 540145516Sdarrenr spa_config_sync(spa, B_FALSE, what != SPA_CONFIG_UPDATE_POOL); 541145516Sdarrenr 542145516Sdarrenr if (what == SPA_CONFIG_UPDATE_POOL) 543145516Sdarrenr spa_config_update(spa, SPA_CONFIG_UPDATE_VDEVS); 544145516Sdarrenr} 545145516Sdarrenr