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 */ 21fa9e4066Sahrens /* 229842588bSGeorge Wilson * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23fa9e4066Sahrens */ 24fa9e4066Sahrens 25fa9e4066Sahrens #include <sys/zfs_context.h> 26fa9e4066Sahrens #include <sys/spa_impl.h> 27fa9e4066Sahrens #include <sys/zio.h> 28fa9e4066Sahrens #include <sys/zio_checksum.h> 29fa9e4066Sahrens #include <sys/zio_compress.h> 30fa9e4066Sahrens #include <sys/dmu.h> 31fa9e4066Sahrens #include <sys/dmu_tx.h> 32fa9e4066Sahrens #include <sys/zap.h> 33fa9e4066Sahrens #include <sys/zil.h> 34fa9e4066Sahrens #include <sys/vdev_impl.h> 35fa9e4066Sahrens #include <sys/metaslab.h> 36fa9e4066Sahrens #include <sys/uberblock_impl.h> 37fa9e4066Sahrens #include <sys/txg.h> 38fa9e4066Sahrens #include <sys/avl.h> 39fa9e4066Sahrens #include <sys/unique.h> 40fa9e4066Sahrens #include <sys/dsl_pool.h> 41fa9e4066Sahrens #include <sys/dsl_dir.h> 42fa9e4066Sahrens #include <sys/dsl_prop.h> 433f9d6ad7SLin Ling #include <sys/dsl_scan.h> 44fa9e4066Sahrens #include <sys/fs/zfs.h> 456ce0521aSperrin #include <sys/metaslab_impl.h> 46e14bb325SJeff Bonwick #include <sys/arc.h> 47485bbbf5SGeorge Wilson #include <sys/ddt.h> 4891ebeef5Sahrens #include "zfs_prop.h" 49fa9e4066Sahrens 50fa9e4066Sahrens /* 51fa9e4066Sahrens * SPA locking 52fa9e4066Sahrens * 53fa9e4066Sahrens * There are four basic locks for managing spa_t structures: 54fa9e4066Sahrens * 55fa9e4066Sahrens * spa_namespace_lock (global mutex) 56fa9e4066Sahrens * 5744cd46caSbillm * This lock must be acquired to do any of the following: 58fa9e4066Sahrens * 5944cd46caSbillm * - Lookup a spa_t by name 6044cd46caSbillm * - Add or remove a spa_t from the namespace 6144cd46caSbillm * - Increase spa_refcount from non-zero 6244cd46caSbillm * - Check if spa_refcount is zero 6344cd46caSbillm * - Rename a spa_t 64ea8dc4b6Seschrock * - add/remove/attach/detach devices 6544cd46caSbillm * - Held for the duration of create/destroy/import/export 66fa9e4066Sahrens * 6744cd46caSbillm * It does not need to handle recursion. A create or destroy may 6844cd46caSbillm * reference objects (files or zvols) in other pools, but by 6944cd46caSbillm * definition they must have an existing reference, and will never need 7044cd46caSbillm * to lookup a spa_t by name. 71fa9e4066Sahrens * 72fa9e4066Sahrens * spa_refcount (per-spa refcount_t protected by mutex) 73fa9e4066Sahrens * 7444cd46caSbillm * This reference count keep track of any active users of the spa_t. The 7544cd46caSbillm * spa_t cannot be destroyed or freed while this is non-zero. Internally, 7644cd46caSbillm * the refcount is never really 'zero' - opening a pool implicitly keeps 77088f3894Sahrens * some references in the DMU. Internally we check against spa_minref, but 7844cd46caSbillm * present the image of a zero/non-zero value to consumers. 79fa9e4066Sahrens * 80e14bb325SJeff Bonwick * spa_config_lock[] (per-spa array of rwlocks) 81fa9e4066Sahrens * 8291ebeef5Sahrens * This protects the spa_t from config changes, and must be held in 8391ebeef5Sahrens * the following circumstances: 84fa9e4066Sahrens * 8544cd46caSbillm * - RW_READER to perform I/O to the spa 8644cd46caSbillm * - RW_WRITER to change the vdev config 87fa9e4066Sahrens * 88fa9e4066Sahrens * The locking order is fairly straightforward: 89fa9e4066Sahrens * 9044cd46caSbillm * spa_namespace_lock -> spa_refcount 91fa9e4066Sahrens * 9244cd46caSbillm * The namespace lock must be acquired to increase the refcount from 0 9344cd46caSbillm * or to check if it is zero. 94fa9e4066Sahrens * 95e14bb325SJeff Bonwick * spa_refcount -> spa_config_lock[] 96fa9e4066Sahrens * 9744cd46caSbillm * There must be at least one valid reference on the spa_t to acquire 9844cd46caSbillm * the config lock. 99fa9e4066Sahrens * 100e14bb325SJeff Bonwick * spa_namespace_lock -> spa_config_lock[] 101fa9e4066Sahrens * 10244cd46caSbillm * The namespace lock must always be taken before the config lock. 103fa9e4066Sahrens * 104fa9e4066Sahrens * 105e14bb325SJeff Bonwick * The spa_namespace_lock can be acquired directly and is globally visible. 106fa9e4066Sahrens * 107e14bb325SJeff Bonwick * The namespace is manipulated using the following functions, all of which 108e14bb325SJeff Bonwick * require the spa_namespace_lock to be held. 109fa9e4066Sahrens * 11044cd46caSbillm * spa_lookup() Lookup a spa_t by name. 111fa9e4066Sahrens * 11244cd46caSbillm * spa_add() Create a new spa_t in the namespace. 113fa9e4066Sahrens * 11444cd46caSbillm * spa_remove() Remove a spa_t from the namespace. This also 11544cd46caSbillm * frees up any memory associated with the spa_t. 116fa9e4066Sahrens * 11744cd46caSbillm * spa_next() Returns the next spa_t in the system, or the 11844cd46caSbillm * first if NULL is passed. 119fa9e4066Sahrens * 12044cd46caSbillm * spa_evict_all() Shutdown and remove all spa_t structures in 12144cd46caSbillm * the system. 122fa9e4066Sahrens * 123ea8dc4b6Seschrock * spa_guid_exists() Determine whether a pool/device guid exists. 124fa9e4066Sahrens * 125fa9e4066Sahrens * The spa_refcount is manipulated using the following functions: 126fa9e4066Sahrens * 12744cd46caSbillm * spa_open_ref() Adds a reference to the given spa_t. Must be 12844cd46caSbillm * called with spa_namespace_lock held if the 12944cd46caSbillm * refcount is currently zero. 130fa9e4066Sahrens * 13144cd46caSbillm * spa_close() Remove a reference from the spa_t. This will 13244cd46caSbillm * not free the spa_t or remove it from the 13344cd46caSbillm * namespace. No locking is required. 134fa9e4066Sahrens * 13544cd46caSbillm * spa_refcount_zero() Returns true if the refcount is currently 13644cd46caSbillm * zero. Must be called with spa_namespace_lock 13744cd46caSbillm * held. 138fa9e4066Sahrens * 139e14bb325SJeff Bonwick * The spa_config_lock[] is an array of rwlocks, ordered as follows: 140e14bb325SJeff Bonwick * SCL_CONFIG > SCL_STATE > SCL_ALLOC > SCL_ZIO > SCL_FREE > SCL_VDEV. 141e14bb325SJeff Bonwick * spa_config_lock[] is manipulated with spa_config_{enter,exit,held}(). 142e14bb325SJeff Bonwick * 143e14bb325SJeff Bonwick * To read the configuration, it suffices to hold one of these locks as reader. 144e14bb325SJeff Bonwick * To modify the configuration, you must hold all locks as writer. To modify 145e14bb325SJeff Bonwick * vdev state without altering the vdev tree's topology (e.g. online/offline), 146e14bb325SJeff Bonwick * you must hold SCL_STATE and SCL_ZIO as writer. 147e14bb325SJeff Bonwick * 148e14bb325SJeff Bonwick * We use these distinct config locks to avoid recursive lock entry. 149e14bb325SJeff Bonwick * For example, spa_sync() (which holds SCL_CONFIG as reader) induces 150e14bb325SJeff Bonwick * block allocations (SCL_ALLOC), which may require reading space maps 151e14bb325SJeff Bonwick * from disk (dmu_read() -> zio_read() -> SCL_ZIO). 152e14bb325SJeff Bonwick * 153e14bb325SJeff Bonwick * The spa config locks cannot be normal rwlocks because we need the 154e14bb325SJeff Bonwick * ability to hand off ownership. For example, SCL_ZIO is acquired 155e14bb325SJeff Bonwick * by the issuing thread and later released by an interrupt thread. 156e14bb325SJeff Bonwick * They do, however, obey the usual write-wanted semantics to prevent 157e14bb325SJeff Bonwick * writer (i.e. system administrator) starvation. 158e14bb325SJeff Bonwick * 159e14bb325SJeff Bonwick * The lock acquisition rules are as follows: 160e14bb325SJeff Bonwick * 161e14bb325SJeff Bonwick * SCL_CONFIG 162e14bb325SJeff Bonwick * Protects changes to the vdev tree topology, such as vdev 163e14bb325SJeff Bonwick * add/remove/attach/detach. Protects the dirty config list 164e14bb325SJeff Bonwick * (spa_config_dirty_list) and the set of spares and l2arc devices. 165e14bb325SJeff Bonwick * 166e14bb325SJeff Bonwick * SCL_STATE 167e14bb325SJeff Bonwick * Protects changes to pool state and vdev state, such as vdev 168e14bb325SJeff Bonwick * online/offline/fault/degrade/clear. Protects the dirty state list 169e14bb325SJeff Bonwick * (spa_state_dirty_list) and global pool state (spa_state). 170e14bb325SJeff Bonwick * 171e14bb325SJeff Bonwick * SCL_ALLOC 172e14bb325SJeff Bonwick * Protects changes to metaslab groups and classes. 173e14bb325SJeff Bonwick * Held as reader by metaslab_alloc() and metaslab_claim(). 174e14bb325SJeff Bonwick * 175e14bb325SJeff Bonwick * SCL_ZIO 176e14bb325SJeff Bonwick * Held by bp-level zios (those which have no io_vd upon entry) 177e14bb325SJeff Bonwick * to prevent changes to the vdev tree. The bp-level zio implicitly 178e14bb325SJeff Bonwick * protects all of its vdev child zios, which do not hold SCL_ZIO. 179e14bb325SJeff Bonwick * 180e14bb325SJeff Bonwick * SCL_FREE 181e14bb325SJeff Bonwick * Protects changes to metaslab groups and classes. 182e14bb325SJeff Bonwick * Held as reader by metaslab_free(). SCL_FREE is distinct from 183e14bb325SJeff Bonwick * SCL_ALLOC, and lower than SCL_ZIO, so that we can safely free 184e14bb325SJeff Bonwick * blocks in zio_done() while another i/o that holds either 185e14bb325SJeff Bonwick * SCL_ALLOC or SCL_ZIO is waiting for this i/o to complete. 186e14bb325SJeff Bonwick * 187e14bb325SJeff Bonwick * SCL_VDEV 188e14bb325SJeff Bonwick * Held as reader to prevent changes to the vdev tree during trivial 189b24ab676SJeff Bonwick * inquiries such as bp_get_dsize(). SCL_VDEV is distinct from the 190e14bb325SJeff Bonwick * other locks, and lower than all of them, to ensure that it's safe 191e14bb325SJeff Bonwick * to acquire regardless of caller context. 192e14bb325SJeff Bonwick * 193e14bb325SJeff Bonwick * In addition, the following rules apply: 194e14bb325SJeff Bonwick * 195e14bb325SJeff Bonwick * (a) spa_props_lock protects pool properties, spa_config and spa_config_list. 196e14bb325SJeff Bonwick * The lock ordering is SCL_CONFIG > spa_props_lock. 197e14bb325SJeff Bonwick * 198e14bb325SJeff Bonwick * (b) I/O operations on leaf vdevs. For any zio operation that takes 199e14bb325SJeff Bonwick * an explicit vdev_t argument -- such as zio_ioctl(), zio_read_phys(), 200e14bb325SJeff Bonwick * or zio_write_phys() -- the caller must ensure that the config cannot 201e14bb325SJeff Bonwick * cannot change in the interim, and that the vdev cannot be reopened. 202e14bb325SJeff Bonwick * SCL_STATE as reader suffices for both. 203fa9e4066Sahrens * 204ea8dc4b6Seschrock * The vdev configuration is protected by spa_vdev_enter() / spa_vdev_exit(). 205fa9e4066Sahrens * 20644cd46caSbillm * spa_vdev_enter() Acquire the namespace lock and the config lock 207ea8dc4b6Seschrock * for writing. 208fa9e4066Sahrens * 20944cd46caSbillm * spa_vdev_exit() Release the config lock, wait for all I/O 21044cd46caSbillm * to complete, sync the updated configs to the 211ea8dc4b6Seschrock * cache, and release the namespace lock. 212fa9e4066Sahrens * 213e14bb325SJeff Bonwick * vdev state is protected by spa_vdev_state_enter() / spa_vdev_state_exit(). 214e14bb325SJeff Bonwick * Like spa_vdev_enter/exit, these are convenience wrappers -- the actual 215e14bb325SJeff Bonwick * locking is, always, based on spa_namespace_lock and spa_config_lock[]. 216e14bb325SJeff Bonwick * 217e14bb325SJeff Bonwick * spa_rename() is also implemented within this file since is requires 218e14bb325SJeff Bonwick * manipulation of the namespace. 219fa9e4066Sahrens */ 220fa9e4066Sahrens 221fa9e4066Sahrens static avl_tree_t spa_namespace_avl; 222fa9e4066Sahrens kmutex_t spa_namespace_lock; 223fa9e4066Sahrens static kcondvar_t spa_namespace_cv; 2240373e76bSbonwick static int spa_active_count; 225416e0cd8Sek int spa_max_replication_override = SPA_DVAS_PER_BP; 226fa9e4066Sahrens 22799653d4eSeschrock static kmutex_t spa_spare_lock; 22839c23413Seschrock static avl_tree_t spa_spare_avl; 229fa94a07fSbrendan static kmutex_t spa_l2cache_lock; 230fa94a07fSbrendan static avl_tree_t spa_l2cache_avl; 23199653d4eSeschrock 232fa9e4066Sahrens kmem_cache_t *spa_buffer_pool; 2338ad4d6ddSJeff Bonwick int spa_mode_global; 234fa9e4066Sahrens 235fa9e4066Sahrens #ifdef ZFS_DEBUG 23640feaa91Sahrens /* Everything except dprintf is on by default in debug builds */ 23740feaa91Sahrens int zfs_flags = ~ZFS_DEBUG_DPRINTF; 238fa9e4066Sahrens #else 239fa9e4066Sahrens int zfs_flags = 0; 240fa9e4066Sahrens #endif 241fa9e4066Sahrens 2420125049cSahrens /* 2430125049cSahrens * zfs_recover can be set to nonzero to attempt to recover from 2440125049cSahrens * otherwise-fatal errors, typically caused by on-disk corruption. When 2450125049cSahrens * set, calls to zfs_panic_recover() will turn into warning messages. 2460125049cSahrens */ 2470125049cSahrens int zfs_recover = 0; 2480125049cSahrens 249fa9e4066Sahrens 250e05725b1Sbonwick /* 251e05725b1Sbonwick * ========================================================================== 252e05725b1Sbonwick * SPA config locking 253e05725b1Sbonwick * ========================================================================== 254e05725b1Sbonwick */ 255e05725b1Sbonwick static void 256e14bb325SJeff Bonwick spa_config_lock_init(spa_t *spa) 257e14bb325SJeff Bonwick { 258e14bb325SJeff Bonwick for (int i = 0; i < SCL_LOCKS; i++) { 259e14bb325SJeff Bonwick spa_config_lock_t *scl = &spa->spa_config_lock[i]; 260e14bb325SJeff Bonwick mutex_init(&scl->scl_lock, NULL, MUTEX_DEFAULT, NULL); 261e14bb325SJeff Bonwick cv_init(&scl->scl_cv, NULL, CV_DEFAULT, NULL); 262e14bb325SJeff Bonwick refcount_create(&scl->scl_count); 263e14bb325SJeff Bonwick scl->scl_writer = NULL; 264e14bb325SJeff Bonwick scl->scl_write_wanted = 0; 265e14bb325SJeff Bonwick } 266e05725b1Sbonwick } 267e05725b1Sbonwick 268e05725b1Sbonwick static void 269e14bb325SJeff Bonwick spa_config_lock_destroy(spa_t *spa) 270e14bb325SJeff Bonwick { 271e14bb325SJeff Bonwick for (int i = 0; i < SCL_LOCKS; i++) { 272e14bb325SJeff Bonwick spa_config_lock_t *scl = &spa->spa_config_lock[i]; 273e14bb325SJeff Bonwick mutex_destroy(&scl->scl_lock); 274e14bb325SJeff Bonwick cv_destroy(&scl->scl_cv); 275e14bb325SJeff Bonwick refcount_destroy(&scl->scl_count); 276e14bb325SJeff Bonwick ASSERT(scl->scl_writer == NULL); 277e14bb325SJeff Bonwick ASSERT(scl->scl_write_wanted == 0); 278e14bb325SJeff Bonwick } 279e14bb325SJeff Bonwick } 280e14bb325SJeff Bonwick 281e14bb325SJeff Bonwick int 282e14bb325SJeff Bonwick spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw) 283e05725b1Sbonwick { 284e14bb325SJeff Bonwick for (int i = 0; i < SCL_LOCKS; i++) { 285e14bb325SJeff Bonwick spa_config_lock_t *scl = &spa->spa_config_lock[i]; 286e14bb325SJeff Bonwick if (!(locks & (1 << i))) 287e14bb325SJeff Bonwick continue; 288e14bb325SJeff Bonwick mutex_enter(&scl->scl_lock); 289e14bb325SJeff Bonwick if (rw == RW_READER) { 290e14bb325SJeff Bonwick if (scl->scl_writer || scl->scl_write_wanted) { 291e14bb325SJeff Bonwick mutex_exit(&scl->scl_lock); 292e14bb325SJeff Bonwick spa_config_exit(spa, locks ^ (1 << i), tag); 293e14bb325SJeff Bonwick return (0); 294e14bb325SJeff Bonwick } 295e14bb325SJeff Bonwick } else { 296e14bb325SJeff Bonwick ASSERT(scl->scl_writer != curthread); 297e14bb325SJeff Bonwick if (!refcount_is_zero(&scl->scl_count)) { 298e14bb325SJeff Bonwick mutex_exit(&scl->scl_lock); 299e14bb325SJeff Bonwick spa_config_exit(spa, locks ^ (1 << i), tag); 300e14bb325SJeff Bonwick return (0); 301e14bb325SJeff Bonwick } 302e14bb325SJeff Bonwick scl->scl_writer = curthread; 303e14bb325SJeff Bonwick } 304e14bb325SJeff Bonwick (void) refcount_add(&scl->scl_count, tag); 305e14bb325SJeff Bonwick mutex_exit(&scl->scl_lock); 306e14bb325SJeff Bonwick } 307e14bb325SJeff Bonwick return (1); 308e05725b1Sbonwick } 309e05725b1Sbonwick 310e05725b1Sbonwick void 311e14bb325SJeff Bonwick spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw) 312e05725b1Sbonwick { 313f64c0e34SEric Taylor int wlocks_held = 0; 314f64c0e34SEric Taylor 315e14bb325SJeff Bonwick for (int i = 0; i < SCL_LOCKS; i++) { 316e14bb325SJeff Bonwick spa_config_lock_t *scl = &spa->spa_config_lock[i]; 317f64c0e34SEric Taylor if (scl->scl_writer == curthread) 318f64c0e34SEric Taylor wlocks_held |= (1 << i); 319e14bb325SJeff Bonwick if (!(locks & (1 << i))) 320e14bb325SJeff Bonwick continue; 321e14bb325SJeff Bonwick mutex_enter(&scl->scl_lock); 322e14bb325SJeff Bonwick if (rw == RW_READER) { 323e14bb325SJeff Bonwick while (scl->scl_writer || scl->scl_write_wanted) { 324e14bb325SJeff Bonwick cv_wait(&scl->scl_cv, &scl->scl_lock); 325e14bb325SJeff Bonwick } 326e14bb325SJeff Bonwick } else { 327e14bb325SJeff Bonwick ASSERT(scl->scl_writer != curthread); 328e14bb325SJeff Bonwick while (!refcount_is_zero(&scl->scl_count)) { 329e14bb325SJeff Bonwick scl->scl_write_wanted++; 330e14bb325SJeff Bonwick cv_wait(&scl->scl_cv, &scl->scl_lock); 331e14bb325SJeff Bonwick scl->scl_write_wanted--; 332e14bb325SJeff Bonwick } 333e14bb325SJeff Bonwick scl->scl_writer = curthread; 334e14bb325SJeff Bonwick } 335e14bb325SJeff Bonwick (void) refcount_add(&scl->scl_count, tag); 336e14bb325SJeff Bonwick mutex_exit(&scl->scl_lock); 337e05725b1Sbonwick } 338f64c0e34SEric Taylor ASSERT(wlocks_held <= locks); 339e05725b1Sbonwick } 340e05725b1Sbonwick 341e05725b1Sbonwick void 342e14bb325SJeff Bonwick spa_config_exit(spa_t *spa, int locks, void *tag) 343e05725b1Sbonwick { 344e14bb325SJeff Bonwick for (int i = SCL_LOCKS - 1; i >= 0; i--) { 345e14bb325SJeff Bonwick spa_config_lock_t *scl = &spa->spa_config_lock[i]; 346e14bb325SJeff Bonwick if (!(locks & (1 << i))) 347e14bb325SJeff Bonwick continue; 348e14bb325SJeff Bonwick mutex_enter(&scl->scl_lock); 349e14bb325SJeff Bonwick ASSERT(!refcount_is_zero(&scl->scl_count)); 350e14bb325SJeff Bonwick if (refcount_remove(&scl->scl_count, tag) == 0) { 351e14bb325SJeff Bonwick ASSERT(scl->scl_writer == NULL || 352e14bb325SJeff Bonwick scl->scl_writer == curthread); 353e14bb325SJeff Bonwick scl->scl_writer = NULL; /* OK in either case */ 354e14bb325SJeff Bonwick cv_broadcast(&scl->scl_cv); 355e14bb325SJeff Bonwick } 356e14bb325SJeff Bonwick mutex_exit(&scl->scl_lock); 357e05725b1Sbonwick } 358e05725b1Sbonwick } 359e05725b1Sbonwick 360e14bb325SJeff Bonwick int 361e14bb325SJeff Bonwick spa_config_held(spa_t *spa, int locks, krw_t rw) 362e05725b1Sbonwick { 363e14bb325SJeff Bonwick int locks_held = 0; 364e05725b1Sbonwick 365e14bb325SJeff Bonwick for (int i = 0; i < SCL_LOCKS; i++) { 366e14bb325SJeff Bonwick spa_config_lock_t *scl = &spa->spa_config_lock[i]; 367e14bb325SJeff Bonwick if (!(locks & (1 << i))) 368e14bb325SJeff Bonwick continue; 369e14bb325SJeff Bonwick if ((rw == RW_READER && !refcount_is_zero(&scl->scl_count)) || 370e14bb325SJeff Bonwick (rw == RW_WRITER && scl->scl_writer == curthread)) 371e14bb325SJeff Bonwick locks_held |= 1 << i; 372e14bb325SJeff Bonwick } 373e14bb325SJeff Bonwick 374e14bb325SJeff Bonwick return (locks_held); 375e05725b1Sbonwick } 376e05725b1Sbonwick 377fa9e4066Sahrens /* 378fa9e4066Sahrens * ========================================================================== 379fa9e4066Sahrens * SPA namespace functions 380fa9e4066Sahrens * ========================================================================== 381fa9e4066Sahrens */ 382fa9e4066Sahrens 383fa9e4066Sahrens /* 384fa9e4066Sahrens * Lookup the named spa_t in the AVL tree. The spa_namespace_lock must be held. 385fa9e4066Sahrens * Returns NULL if no matching spa_t is found. 386fa9e4066Sahrens */ 387fa9e4066Sahrens spa_t * 388fa9e4066Sahrens spa_lookup(const char *name) 389fa9e4066Sahrens { 390e14bb325SJeff Bonwick static spa_t search; /* spa_t is large; don't allocate on stack */ 391e14bb325SJeff Bonwick spa_t *spa; 392fa9e4066Sahrens avl_index_t where; 39340feaa91Sahrens char c; 39440feaa91Sahrens char *cp; 395fa9e4066Sahrens 396fa9e4066Sahrens ASSERT(MUTEX_HELD(&spa_namespace_lock)); 397fa9e4066Sahrens 39840feaa91Sahrens /* 39940feaa91Sahrens * If it's a full dataset name, figure out the pool name and 40040feaa91Sahrens * just use that. 40140feaa91Sahrens */ 40240feaa91Sahrens cp = strpbrk(name, "/@"); 40340feaa91Sahrens if (cp) { 40440feaa91Sahrens c = *cp; 40540feaa91Sahrens *cp = '\0'; 40640feaa91Sahrens } 40740feaa91Sahrens 408e14bb325SJeff Bonwick (void) strlcpy(search.spa_name, name, sizeof (search.spa_name)); 409fa9e4066Sahrens spa = avl_find(&spa_namespace_avl, &search, &where); 410fa9e4066Sahrens 41140feaa91Sahrens if (cp) 41240feaa91Sahrens *cp = c; 41340feaa91Sahrens 414fa9e4066Sahrens return (spa); 415fa9e4066Sahrens } 416fa9e4066Sahrens 417fa9e4066Sahrens /* 418fa9e4066Sahrens * Create an uninitialized spa_t with the given name. Requires 419fa9e4066Sahrens * spa_namespace_lock. The caller must ensure that the spa_t doesn't already 420fa9e4066Sahrens * exist by calling spa_lookup() first. 421fa9e4066Sahrens */ 422fa9e4066Sahrens spa_t * 423468c413aSTim Haley spa_add(const char *name, nvlist_t *config, const char *altroot) 424fa9e4066Sahrens { 425fa9e4066Sahrens spa_t *spa; 426c5904d13Seschrock spa_config_dirent_t *dp; 427fa9e4066Sahrens 428fa9e4066Sahrens ASSERT(MUTEX_HELD(&spa_namespace_lock)); 429fa9e4066Sahrens 430fa9e4066Sahrens spa = kmem_zalloc(sizeof (spa_t), KM_SLEEP); 431fa9e4066Sahrens 432c25056deSgw mutex_init(&spa->spa_async_lock, NULL, MUTEX_DEFAULT, NULL); 433c25056deSgw mutex_init(&spa->spa_errlist_lock, NULL, MUTEX_DEFAULT, NULL); 43435a5a358SJonathan Adams mutex_init(&spa->spa_errlog_lock, NULL, MUTEX_DEFAULT, NULL); 435c25056deSgw mutex_init(&spa->spa_history_lock, NULL, MUTEX_DEFAULT, NULL); 43635a5a358SJonathan Adams mutex_init(&spa->spa_proc_lock, NULL, MUTEX_DEFAULT, NULL); 437c25056deSgw mutex_init(&spa->spa_props_lock, NULL, MUTEX_DEFAULT, NULL); 43835a5a358SJonathan Adams mutex_init(&spa->spa_scrub_lock, NULL, MUTEX_DEFAULT, NULL); 439a1521560SJeff Bonwick mutex_init(&spa->spa_suspend_lock, NULL, MUTEX_DEFAULT, NULL); 440a1521560SJeff Bonwick mutex_init(&spa->spa_vdev_top_lock, NULL, MUTEX_DEFAULT, NULL); 441c25056deSgw 442c25056deSgw cv_init(&spa->spa_async_cv, NULL, CV_DEFAULT, NULL); 44335a5a358SJonathan Adams cv_init(&spa->spa_proc_cv, NULL, CV_DEFAULT, NULL); 444c25056deSgw cv_init(&spa->spa_scrub_io_cv, NULL, CV_DEFAULT, NULL); 445e14bb325SJeff Bonwick cv_init(&spa->spa_suspend_cv, NULL, CV_DEFAULT, NULL); 446c25056deSgw 447b24ab676SJeff Bonwick for (int t = 0; t < TXG_SIZE; t++) 448*cde58dbcSMatthew Ahrens bplist_create(&spa->spa_free_bplist[t]); 449b24ab676SJeff Bonwick 450e14bb325SJeff Bonwick (void) strlcpy(spa->spa_name, name, sizeof (spa->spa_name)); 451fa9e4066Sahrens spa->spa_state = POOL_STATE_UNINITIALIZED; 452fa9e4066Sahrens spa->spa_freeze_txg = UINT64_MAX; 4530373e76bSbonwick spa->spa_final_txg = UINT64_MAX; 454468c413aSTim Haley spa->spa_load_max_txg = UINT64_MAX; 45535a5a358SJonathan Adams spa->spa_proc = &p0; 45635a5a358SJonathan Adams spa->spa_proc_state = SPA_PROC_NONE; 457fa9e4066Sahrens 458fa9e4066Sahrens refcount_create(&spa->spa_refcount); 459e14bb325SJeff Bonwick spa_config_lock_init(spa); 460fa9e4066Sahrens 461fa9e4066Sahrens avl_add(&spa_namespace_avl, spa); 462fa9e4066Sahrens 4630373e76bSbonwick /* 4640373e76bSbonwick * Set the alternate root, if there is one. 4650373e76bSbonwick */ 4660373e76bSbonwick if (altroot) { 4670373e76bSbonwick spa->spa_root = spa_strdup(altroot); 4680373e76bSbonwick spa_active_count++; 4690373e76bSbonwick } 4700373e76bSbonwick 471c5904d13Seschrock /* 472c5904d13Seschrock * Every pool starts with the default cachefile 473c5904d13Seschrock */ 474c5904d13Seschrock list_create(&spa->spa_config_list, sizeof (spa_config_dirent_t), 475c5904d13Seschrock offsetof(spa_config_dirent_t, scd_link)); 476c5904d13Seschrock 477c5904d13Seschrock dp = kmem_zalloc(sizeof (spa_config_dirent_t), KM_SLEEP); 478ef912c80STim Haley dp->scd_path = altroot ? NULL : spa_strdup(spa_config_path); 479c5904d13Seschrock list_insert_head(&spa->spa_config_list, dp); 480c5904d13Seschrock 481468c413aSTim Haley if (config != NULL) 482468c413aSTim Haley VERIFY(nvlist_dup(config, &spa->spa_config, 0) == 0); 483468c413aSTim Haley 484fa9e4066Sahrens return (spa); 485fa9e4066Sahrens } 486fa9e4066Sahrens 487fa9e4066Sahrens /* 488fa9e4066Sahrens * Removes a spa_t from the namespace, freeing up any memory used. Requires 489fa9e4066Sahrens * spa_namespace_lock. This is called only after the spa_t has been closed and 490fa9e4066Sahrens * deactivated. 491fa9e4066Sahrens */ 492fa9e4066Sahrens void 493fa9e4066Sahrens spa_remove(spa_t *spa) 494fa9e4066Sahrens { 495c5904d13Seschrock spa_config_dirent_t *dp; 496c5904d13Seschrock 497fa9e4066Sahrens ASSERT(MUTEX_HELD(&spa_namespace_lock)); 498fa9e4066Sahrens ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); 499fa9e4066Sahrens 5001195e687SMark J Musante nvlist_free(spa->spa_config_splitting); 5011195e687SMark J Musante 502fa9e4066Sahrens avl_remove(&spa_namespace_avl, spa); 503fa9e4066Sahrens cv_broadcast(&spa_namespace_cv); 504fa9e4066Sahrens 5050373e76bSbonwick if (spa->spa_root) { 506fa9e4066Sahrens spa_strfree(spa->spa_root); 5070373e76bSbonwick spa_active_count--; 5080373e76bSbonwick } 509fa9e4066Sahrens 510c5904d13Seschrock while ((dp = list_head(&spa->spa_config_list)) != NULL) { 511c5904d13Seschrock list_remove(&spa->spa_config_list, dp); 512c5904d13Seschrock if (dp->scd_path != NULL) 513c5904d13Seschrock spa_strfree(dp->scd_path); 514c5904d13Seschrock kmem_free(dp, sizeof (spa_config_dirent_t)); 515c5904d13Seschrock } 516c5904d13Seschrock 517c5904d13Seschrock list_destroy(&spa->spa_config_list); 5182f8aaab3Seschrock 519fa9e4066Sahrens spa_config_set(spa, NULL); 520fa9e4066Sahrens 521fa9e4066Sahrens refcount_destroy(&spa->spa_refcount); 52291ebeef5Sahrens 523e14bb325SJeff Bonwick spa_config_lock_destroy(spa); 524fa9e4066Sahrens 525b24ab676SJeff Bonwick for (int t = 0; t < TXG_SIZE; t++) 526*cde58dbcSMatthew Ahrens bplist_destroy(&spa->spa_free_bplist[t]); 527b24ab676SJeff Bonwick 528c25056deSgw cv_destroy(&spa->spa_async_cv); 52935a5a358SJonathan Adams cv_destroy(&spa->spa_proc_cv); 530c25056deSgw cv_destroy(&spa->spa_scrub_io_cv); 531e14bb325SJeff Bonwick cv_destroy(&spa->spa_suspend_cv); 532c25056deSgw 5335ad82045Snd mutex_destroy(&spa->spa_async_lock); 534c25056deSgw mutex_destroy(&spa->spa_errlist_lock); 53535a5a358SJonathan Adams mutex_destroy(&spa->spa_errlog_lock); 53606eeb2adSek mutex_destroy(&spa->spa_history_lock); 53735a5a358SJonathan Adams mutex_destroy(&spa->spa_proc_lock); 538b1b8ab34Slling mutex_destroy(&spa->spa_props_lock); 53935a5a358SJonathan Adams mutex_destroy(&spa->spa_scrub_lock); 540e14bb325SJeff Bonwick mutex_destroy(&spa->spa_suspend_lock); 541a1521560SJeff Bonwick mutex_destroy(&spa->spa_vdev_top_lock); 5425ad82045Snd 543fa9e4066Sahrens kmem_free(spa, sizeof (spa_t)); 544fa9e4066Sahrens } 545fa9e4066Sahrens 546fa9e4066Sahrens /* 547fa9e4066Sahrens * Given a pool, return the next pool in the namespace, or NULL if there is 548fa9e4066Sahrens * none. If 'prev' is NULL, return the first pool. 549fa9e4066Sahrens */ 550fa9e4066Sahrens spa_t * 551fa9e4066Sahrens spa_next(spa_t *prev) 552fa9e4066Sahrens { 553fa9e4066Sahrens ASSERT(MUTEX_HELD(&spa_namespace_lock)); 554fa9e4066Sahrens 555fa9e4066Sahrens if (prev) 556fa9e4066Sahrens return (AVL_NEXT(&spa_namespace_avl, prev)); 557fa9e4066Sahrens else 558fa9e4066Sahrens return (avl_first(&spa_namespace_avl)); 559fa9e4066Sahrens } 560fa9e4066Sahrens 561fa9e4066Sahrens /* 562fa9e4066Sahrens * ========================================================================== 563fa9e4066Sahrens * SPA refcount functions 564fa9e4066Sahrens * ========================================================================== 565fa9e4066Sahrens */ 566fa9e4066Sahrens 567fa9e4066Sahrens /* 568fa9e4066Sahrens * Add a reference to the given spa_t. Must have at least one reference, or 569fa9e4066Sahrens * have the namespace lock held. 570fa9e4066Sahrens */ 571fa9e4066Sahrens void 572fa9e4066Sahrens spa_open_ref(spa_t *spa, void *tag) 573fa9e4066Sahrens { 574088f3894Sahrens ASSERT(refcount_count(&spa->spa_refcount) >= spa->spa_minref || 575fa9e4066Sahrens MUTEX_HELD(&spa_namespace_lock)); 576fa9e4066Sahrens (void) refcount_add(&spa->spa_refcount, tag); 577fa9e4066Sahrens } 578fa9e4066Sahrens 579fa9e4066Sahrens /* 580fa9e4066Sahrens * Remove a reference to the given spa_t. Must have at least one reference, or 581fa9e4066Sahrens * have the namespace lock held. 582fa9e4066Sahrens */ 583fa9e4066Sahrens void 584fa9e4066Sahrens spa_close(spa_t *spa, void *tag) 585fa9e4066Sahrens { 586088f3894Sahrens ASSERT(refcount_count(&spa->spa_refcount) > spa->spa_minref || 587fa9e4066Sahrens MUTEX_HELD(&spa_namespace_lock)); 588fa9e4066Sahrens (void) refcount_remove(&spa->spa_refcount, tag); 589fa9e4066Sahrens } 590fa9e4066Sahrens 591fa9e4066Sahrens /* 592fa9e4066Sahrens * Check to see if the spa refcount is zero. Must be called with 593088f3894Sahrens * spa_namespace_lock held. We really compare against spa_minref, which is the 594fa9e4066Sahrens * number of references acquired when opening a pool 595fa9e4066Sahrens */ 596fa9e4066Sahrens boolean_t 597fa9e4066Sahrens spa_refcount_zero(spa_t *spa) 598fa9e4066Sahrens { 599fa9e4066Sahrens ASSERT(MUTEX_HELD(&spa_namespace_lock)); 600fa9e4066Sahrens 601088f3894Sahrens return (refcount_count(&spa->spa_refcount) == spa->spa_minref); 602fa9e4066Sahrens } 603fa9e4066Sahrens 60499653d4eSeschrock /* 60599653d4eSeschrock * ========================================================================== 606fa94a07fSbrendan * SPA spare and l2cache tracking 60799653d4eSeschrock * ========================================================================== 60899653d4eSeschrock */ 60999653d4eSeschrock 610fa94a07fSbrendan /* 611fa94a07fSbrendan * Hot spares and cache devices are tracked using the same code below, 612fa94a07fSbrendan * for 'auxiliary' devices. 613fa94a07fSbrendan */ 614fa94a07fSbrendan 615fa94a07fSbrendan typedef struct spa_aux { 616fa94a07fSbrendan uint64_t aux_guid; 617fa94a07fSbrendan uint64_t aux_pool; 618fa94a07fSbrendan avl_node_t aux_avl; 619fa94a07fSbrendan int aux_count; 620fa94a07fSbrendan } spa_aux_t; 621fa94a07fSbrendan 622fa94a07fSbrendan static int 623fa94a07fSbrendan spa_aux_compare(const void *a, const void *b) 624fa94a07fSbrendan { 625fa94a07fSbrendan const spa_aux_t *sa = a; 626fa94a07fSbrendan const spa_aux_t *sb = b; 627fa94a07fSbrendan 628fa94a07fSbrendan if (sa->aux_guid < sb->aux_guid) 629fa94a07fSbrendan return (-1); 630fa94a07fSbrendan else if (sa->aux_guid > sb->aux_guid) 631fa94a07fSbrendan return (1); 632fa94a07fSbrendan else 633fa94a07fSbrendan return (0); 634fa94a07fSbrendan } 635fa94a07fSbrendan 636fa94a07fSbrendan void 637fa94a07fSbrendan spa_aux_add(vdev_t *vd, avl_tree_t *avl) 638fa94a07fSbrendan { 639fa94a07fSbrendan avl_index_t where; 640fa94a07fSbrendan spa_aux_t search; 641fa94a07fSbrendan spa_aux_t *aux; 642fa94a07fSbrendan 643fa94a07fSbrendan search.aux_guid = vd->vdev_guid; 644fa94a07fSbrendan if ((aux = avl_find(avl, &search, &where)) != NULL) { 645fa94a07fSbrendan aux->aux_count++; 646fa94a07fSbrendan } else { 647fa94a07fSbrendan aux = kmem_zalloc(sizeof (spa_aux_t), KM_SLEEP); 648fa94a07fSbrendan aux->aux_guid = vd->vdev_guid; 649fa94a07fSbrendan aux->aux_count = 1; 650fa94a07fSbrendan avl_insert(avl, aux, where); 651fa94a07fSbrendan } 652fa94a07fSbrendan } 653fa94a07fSbrendan 654fa94a07fSbrendan void 655fa94a07fSbrendan spa_aux_remove(vdev_t *vd, avl_tree_t *avl) 656fa94a07fSbrendan { 657fa94a07fSbrendan spa_aux_t search; 658fa94a07fSbrendan spa_aux_t *aux; 659fa94a07fSbrendan avl_index_t where; 660fa94a07fSbrendan 661fa94a07fSbrendan search.aux_guid = vd->vdev_guid; 662fa94a07fSbrendan aux = avl_find(avl, &search, &where); 663fa94a07fSbrendan 664fa94a07fSbrendan ASSERT(aux != NULL); 665fa94a07fSbrendan 666fa94a07fSbrendan if (--aux->aux_count == 0) { 667fa94a07fSbrendan avl_remove(avl, aux); 668fa94a07fSbrendan kmem_free(aux, sizeof (spa_aux_t)); 669fa94a07fSbrendan } else if (aux->aux_pool == spa_guid(vd->vdev_spa)) { 670fa94a07fSbrendan aux->aux_pool = 0ULL; 671fa94a07fSbrendan } 672fa94a07fSbrendan } 673fa94a07fSbrendan 674fa94a07fSbrendan boolean_t 67589a89ebfSlling spa_aux_exists(uint64_t guid, uint64_t *pool, int *refcnt, avl_tree_t *avl) 676fa94a07fSbrendan { 677fa94a07fSbrendan spa_aux_t search, *found; 678fa94a07fSbrendan 679fa94a07fSbrendan search.aux_guid = guid; 68089a89ebfSlling found = avl_find(avl, &search, NULL); 681fa94a07fSbrendan 682fa94a07fSbrendan if (pool) { 683fa94a07fSbrendan if (found) 684fa94a07fSbrendan *pool = found->aux_pool; 685fa94a07fSbrendan else 686fa94a07fSbrendan *pool = 0ULL; 687fa94a07fSbrendan } 688fa94a07fSbrendan 68989a89ebfSlling if (refcnt) { 69089a89ebfSlling if (found) 69189a89ebfSlling *refcnt = found->aux_count; 69289a89ebfSlling else 69389a89ebfSlling *refcnt = 0; 69489a89ebfSlling } 69589a89ebfSlling 696fa94a07fSbrendan return (found != NULL); 697fa94a07fSbrendan } 698fa94a07fSbrendan 699fa94a07fSbrendan void 700fa94a07fSbrendan spa_aux_activate(vdev_t *vd, avl_tree_t *avl) 701fa94a07fSbrendan { 702fa94a07fSbrendan spa_aux_t search, *found; 703fa94a07fSbrendan avl_index_t where; 704fa94a07fSbrendan 705fa94a07fSbrendan search.aux_guid = vd->vdev_guid; 706fa94a07fSbrendan found = avl_find(avl, &search, &where); 707fa94a07fSbrendan ASSERT(found != NULL); 708fa94a07fSbrendan ASSERT(found->aux_pool == 0ULL); 709fa94a07fSbrendan 710fa94a07fSbrendan found->aux_pool = spa_guid(vd->vdev_spa); 711fa94a07fSbrendan } 712fa94a07fSbrendan 71399653d4eSeschrock /* 71439c23413Seschrock * Spares are tracked globally due to the following constraints: 71539c23413Seschrock * 71639c23413Seschrock * - A spare may be part of multiple pools. 71739c23413Seschrock * - A spare may be added to a pool even if it's actively in use within 71839c23413Seschrock * another pool. 71939c23413Seschrock * - A spare in use in any pool can only be the source of a replacement if 72039c23413Seschrock * the target is a spare in the same pool. 72139c23413Seschrock * 72239c23413Seschrock * We keep track of all spares on the system through the use of a reference 72339c23413Seschrock * counted AVL tree. When a vdev is added as a spare, or used as a replacement 72439c23413Seschrock * spare, then we bump the reference count in the AVL tree. In addition, we set 72539c23413Seschrock * the 'vdev_isspare' member to indicate that the device is a spare (active or 72639c23413Seschrock * inactive). When a spare is made active (used to replace a device in the 72739c23413Seschrock * pool), we also keep track of which pool its been made a part of. 72839c23413Seschrock * 72939c23413Seschrock * The 'spa_spare_lock' protects the AVL tree. These functions are normally 73039c23413Seschrock * called under the spa_namespace lock as part of vdev reconfiguration. The 73139c23413Seschrock * separate spare lock exists for the status query path, which does not need to 73239c23413Seschrock * be completely consistent with respect to other vdev configuration changes. 73399653d4eSeschrock */ 73439c23413Seschrock 73599653d4eSeschrock static int 73699653d4eSeschrock spa_spare_compare(const void *a, const void *b) 73799653d4eSeschrock { 738fa94a07fSbrendan return (spa_aux_compare(a, b)); 73999653d4eSeschrock } 74099653d4eSeschrock 74199653d4eSeschrock void 74239c23413Seschrock spa_spare_add(vdev_t *vd) 74399653d4eSeschrock { 74499653d4eSeschrock mutex_enter(&spa_spare_lock); 74539c23413Seschrock ASSERT(!vd->vdev_isspare); 746fa94a07fSbrendan spa_aux_add(vd, &spa_spare_avl); 74739c23413Seschrock vd->vdev_isspare = B_TRUE; 74899653d4eSeschrock mutex_exit(&spa_spare_lock); 74999653d4eSeschrock } 75099653d4eSeschrock 75199653d4eSeschrock void 75239c23413Seschrock spa_spare_remove(vdev_t *vd) 75399653d4eSeschrock { 75499653d4eSeschrock mutex_enter(&spa_spare_lock); 75539c23413Seschrock ASSERT(vd->vdev_isspare); 756fa94a07fSbrendan spa_aux_remove(vd, &spa_spare_avl); 75739c23413Seschrock vd->vdev_isspare = B_FALSE; 75899653d4eSeschrock mutex_exit(&spa_spare_lock); 75999653d4eSeschrock } 76099653d4eSeschrock 76199653d4eSeschrock boolean_t 76289a89ebfSlling spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt) 76399653d4eSeschrock { 764fa94a07fSbrendan boolean_t found; 76599653d4eSeschrock 76699653d4eSeschrock mutex_enter(&spa_spare_lock); 76789a89ebfSlling found = spa_aux_exists(guid, pool, refcnt, &spa_spare_avl); 76899653d4eSeschrock mutex_exit(&spa_spare_lock); 76999653d4eSeschrock 770fa94a07fSbrendan return (found); 77139c23413Seschrock } 77239c23413Seschrock 77339c23413Seschrock void 77439c23413Seschrock spa_spare_activate(vdev_t *vd) 77539c23413Seschrock { 77639c23413Seschrock mutex_enter(&spa_spare_lock); 77739c23413Seschrock ASSERT(vd->vdev_isspare); 778fa94a07fSbrendan spa_aux_activate(vd, &spa_spare_avl); 779fa94a07fSbrendan mutex_exit(&spa_spare_lock); 780fa94a07fSbrendan } 78139c23413Seschrock 782fa94a07fSbrendan /* 783fa94a07fSbrendan * Level 2 ARC devices are tracked globally for the same reasons as spares. 784fa94a07fSbrendan * Cache devices currently only support one pool per cache device, and so 785fa94a07fSbrendan * for these devices the aux reference count is currently unused beyond 1. 786fa94a07fSbrendan */ 78739c23413Seschrock 788fa94a07fSbrendan static int 789fa94a07fSbrendan spa_l2cache_compare(const void *a, const void *b) 790fa94a07fSbrendan { 791fa94a07fSbrendan return (spa_aux_compare(a, b)); 792fa94a07fSbrendan } 793fa94a07fSbrendan 794fa94a07fSbrendan void 795fa94a07fSbrendan spa_l2cache_add(vdev_t *vd) 796fa94a07fSbrendan { 797fa94a07fSbrendan mutex_enter(&spa_l2cache_lock); 798fa94a07fSbrendan ASSERT(!vd->vdev_isl2cache); 799fa94a07fSbrendan spa_aux_add(vd, &spa_l2cache_avl); 800fa94a07fSbrendan vd->vdev_isl2cache = B_TRUE; 801fa94a07fSbrendan mutex_exit(&spa_l2cache_lock); 802fa94a07fSbrendan } 803fa94a07fSbrendan 804fa94a07fSbrendan void 805fa94a07fSbrendan spa_l2cache_remove(vdev_t *vd) 806fa94a07fSbrendan { 807fa94a07fSbrendan mutex_enter(&spa_l2cache_lock); 808fa94a07fSbrendan ASSERT(vd->vdev_isl2cache); 809fa94a07fSbrendan spa_aux_remove(vd, &spa_l2cache_avl); 810fa94a07fSbrendan vd->vdev_isl2cache = B_FALSE; 811fa94a07fSbrendan mutex_exit(&spa_l2cache_lock); 812fa94a07fSbrendan } 813fa94a07fSbrendan 814fa94a07fSbrendan boolean_t 815fa94a07fSbrendan spa_l2cache_exists(uint64_t guid, uint64_t *pool) 816fa94a07fSbrendan { 817fa94a07fSbrendan boolean_t found; 818fa94a07fSbrendan 819fa94a07fSbrendan mutex_enter(&spa_l2cache_lock); 82089a89ebfSlling found = spa_aux_exists(guid, pool, NULL, &spa_l2cache_avl); 821fa94a07fSbrendan mutex_exit(&spa_l2cache_lock); 822fa94a07fSbrendan 823fa94a07fSbrendan return (found); 824fa94a07fSbrendan } 825fa94a07fSbrendan 826fa94a07fSbrendan void 827fa94a07fSbrendan spa_l2cache_activate(vdev_t *vd) 828fa94a07fSbrendan { 829fa94a07fSbrendan mutex_enter(&spa_l2cache_lock); 830fa94a07fSbrendan ASSERT(vd->vdev_isl2cache); 831fa94a07fSbrendan spa_aux_activate(vd, &spa_l2cache_avl); 832fa94a07fSbrendan mutex_exit(&spa_l2cache_lock); 833fa94a07fSbrendan } 834fa94a07fSbrendan 835fa9e4066Sahrens /* 836fa9e4066Sahrens * ========================================================================== 837fa9e4066Sahrens * SPA vdev locking 838fa9e4066Sahrens * ========================================================================== 839fa9e4066Sahrens */ 840fa9e4066Sahrens 841fa9e4066Sahrens /* 842ea8dc4b6Seschrock * Lock the given spa_t for the purpose of adding or removing a vdev. 843ea8dc4b6Seschrock * Grabs the global spa_namespace_lock plus the spa config lock for writing. 844fa9e4066Sahrens * It returns the next transaction group for the spa_t. 845fa9e4066Sahrens */ 846fa9e4066Sahrens uint64_t 847fa9e4066Sahrens spa_vdev_enter(spa_t *spa) 848fa9e4066Sahrens { 849a1521560SJeff Bonwick mutex_enter(&spa->spa_vdev_top_lock); 850bbfd46c4SJeff Bonwick mutex_enter(&spa_namespace_lock); 85188ecc943SGeorge Wilson return (spa_vdev_config_enter(spa)); 85288ecc943SGeorge Wilson } 85388ecc943SGeorge Wilson 85488ecc943SGeorge Wilson /* 85588ecc943SGeorge Wilson * Internal implementation for spa_vdev_enter(). Used when a vdev 85688ecc943SGeorge Wilson * operation requires multiple syncs (i.e. removing a device) while 85788ecc943SGeorge Wilson * keeping the spa_namespace_lock held. 85888ecc943SGeorge Wilson */ 85988ecc943SGeorge Wilson uint64_t 86088ecc943SGeorge Wilson spa_vdev_config_enter(spa_t *spa) 86188ecc943SGeorge Wilson { 86288ecc943SGeorge Wilson ASSERT(MUTEX_HELD(&spa_namespace_lock)); 8633d7072f8Seschrock 864e14bb325SJeff Bonwick spa_config_enter(spa, SCL_ALL, spa, RW_WRITER); 865fa9e4066Sahrens 866fa9e4066Sahrens return (spa_last_synced_txg(spa) + 1); 867fa9e4066Sahrens } 868fa9e4066Sahrens 869fa9e4066Sahrens /* 87088ecc943SGeorge Wilson * Used in combination with spa_vdev_config_enter() to allow the syncing 87188ecc943SGeorge Wilson * of multiple transactions without releasing the spa_namespace_lock. 872fa9e4066Sahrens */ 87388ecc943SGeorge Wilson void 87488ecc943SGeorge Wilson spa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error, char *tag) 875fa9e4066Sahrens { 87688ecc943SGeorge Wilson ASSERT(MUTEX_HELD(&spa_namespace_lock)); 87788ecc943SGeorge Wilson 8780e34b6a7Sbonwick int config_changed = B_FALSE; 879ea8dc4b6Seschrock 8800373e76bSbonwick ASSERT(txg > spa_last_synced_txg(spa)); 8810e34b6a7Sbonwick 882e14bb325SJeff Bonwick spa->spa_pending_vdev = NULL; 883e14bb325SJeff Bonwick 8840e34b6a7Sbonwick /* 8850e34b6a7Sbonwick * Reassess the DTLs. 8860e34b6a7Sbonwick */ 8870373e76bSbonwick vdev_dtl_reassess(spa->spa_root_vdev, 0, 0, B_FALSE); 8880e34b6a7Sbonwick 8890e34b6a7Sbonwick /* 8903f9d6ad7SLin Ling * If the config changed, notify the scrub that it must restart. 8913f9d6ad7SLin Ling * This will initiate a resilver if needed. 8920e34b6a7Sbonwick */ 893e14bb325SJeff Bonwick if (error == 0 && !list_is_empty(&spa->spa_config_dirty_list)) { 8940e34b6a7Sbonwick config_changed = B_TRUE; 8958f18d1faSGeorge Wilson spa->spa_config_generation++; 8960e34b6a7Sbonwick } 897ea8dc4b6Seschrock 89888ecc943SGeorge Wilson /* 89988ecc943SGeorge Wilson * Verify the metaslab classes. 90088ecc943SGeorge Wilson */ 901b24ab676SJeff Bonwick ASSERT(metaslab_class_validate(spa_normal_class(spa)) == 0); 902b24ab676SJeff Bonwick ASSERT(metaslab_class_validate(spa_log_class(spa)) == 0); 90388ecc943SGeorge Wilson 904e14bb325SJeff Bonwick spa_config_exit(spa, SCL_ALL, spa); 905fa9e4066Sahrens 90688ecc943SGeorge Wilson /* 90788ecc943SGeorge Wilson * Panic the system if the specified tag requires it. This 90888ecc943SGeorge Wilson * is useful for ensuring that configurations are updated 90988ecc943SGeorge Wilson * transactionally. 91088ecc943SGeorge Wilson */ 91188ecc943SGeorge Wilson if (zio_injection_enabled) 9121195e687SMark J Musante zio_handle_panic_injection(spa, tag, 0); 91388ecc943SGeorge Wilson 914fa9e4066Sahrens /* 915fa9e4066Sahrens * Note: this txg_wait_synced() is important because it ensures 916fa9e4066Sahrens * that there won't be more than one config change per txg. 917fa9e4066Sahrens * This allows us to use the txg as the generation number. 918fa9e4066Sahrens */ 919fa9e4066Sahrens if (error == 0) 920fa9e4066Sahrens txg_wait_synced(spa->spa_dsl_pool, txg); 921fa9e4066Sahrens 922fa9e4066Sahrens if (vd != NULL) { 9238ad4d6ddSJeff Bonwick ASSERT(!vd->vdev_detached || vd->vdev_dtl_smo.smo_object == 0); 9248ad4d6ddSJeff Bonwick spa_config_enter(spa, SCL_ALL, spa, RW_WRITER); 925fa9e4066Sahrens vdev_free(vd); 9268ad4d6ddSJeff Bonwick spa_config_exit(spa, SCL_ALL, spa); 927fa9e4066Sahrens } 928fa9e4066Sahrens 929fa9e4066Sahrens /* 9300e34b6a7Sbonwick * If the config changed, update the config cache. 931fa9e4066Sahrens */ 9320e34b6a7Sbonwick if (config_changed) 933c5904d13Seschrock spa_config_sync(spa, B_FALSE, B_TRUE); 93488ecc943SGeorge Wilson } 935ea8dc4b6Seschrock 93688ecc943SGeorge Wilson /* 93788ecc943SGeorge Wilson * Unlock the spa_t after adding or removing a vdev. Besides undoing the 93888ecc943SGeorge Wilson * locking of spa_vdev_enter(), we also want make sure the transactions have 93988ecc943SGeorge Wilson * synced to disk, and then update the global configuration cache with the new 94088ecc943SGeorge Wilson * information. 94188ecc943SGeorge Wilson */ 94288ecc943SGeorge Wilson int 94388ecc943SGeorge Wilson spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error) 94488ecc943SGeorge Wilson { 94588ecc943SGeorge Wilson spa_vdev_config_exit(spa, vd, txg, error, FTAG); 946ea8dc4b6Seschrock mutex_exit(&spa_namespace_lock); 947bbfd46c4SJeff Bonwick mutex_exit(&spa->spa_vdev_top_lock); 948fa9e4066Sahrens 949fa9e4066Sahrens return (error); 950fa9e4066Sahrens } 951fa9e4066Sahrens 952e14bb325SJeff Bonwick /* 953e14bb325SJeff Bonwick * Lock the given spa_t for the purpose of changing vdev state. 954e14bb325SJeff Bonwick */ 955e14bb325SJeff Bonwick void 9568f18d1faSGeorge Wilson spa_vdev_state_enter(spa_t *spa, int oplocks) 957e14bb325SJeff Bonwick { 9588f18d1faSGeorge Wilson int locks = SCL_STATE_ALL | oplocks; 9598f18d1faSGeorge Wilson 960dcba9f3fSGeorge Wilson /* 961dcba9f3fSGeorge Wilson * Root pools may need to read of the underlying devfs filesystem 962dcba9f3fSGeorge Wilson * when opening up a vdev. Unfortunately if we're holding the 963dcba9f3fSGeorge Wilson * SCL_ZIO lock it will result in a deadlock when we try to issue 964dcba9f3fSGeorge Wilson * the read from the root filesystem. Instead we "prefetch" 965dcba9f3fSGeorge Wilson * the associated vnodes that we need prior to opening the 966dcba9f3fSGeorge Wilson * underlying devices and cache them so that we can prevent 967dcba9f3fSGeorge Wilson * any I/O when we are doing the actual open. 968dcba9f3fSGeorge Wilson */ 969dcba9f3fSGeorge Wilson if (spa_is_root(spa)) { 9709842588bSGeorge Wilson int low = locks & ~(SCL_ZIO - 1); 9719842588bSGeorge Wilson int high = locks & ~low; 9729842588bSGeorge Wilson 9739842588bSGeorge Wilson spa_config_enter(spa, high, spa, RW_WRITER); 974dcba9f3fSGeorge Wilson vdev_hold(spa->spa_root_vdev); 9759842588bSGeorge Wilson spa_config_enter(spa, low, spa, RW_WRITER); 976dcba9f3fSGeorge Wilson } else { 977dcba9f3fSGeorge Wilson spa_config_enter(spa, locks, spa, RW_WRITER); 978dcba9f3fSGeorge Wilson } 9798f18d1faSGeorge Wilson spa->spa_vdev_locks = locks; 980e14bb325SJeff Bonwick } 981e14bb325SJeff Bonwick 982e14bb325SJeff Bonwick int 983e14bb325SJeff Bonwick spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error) 984e14bb325SJeff Bonwick { 985c6065d0fSGeorge Wilson boolean_t config_changed = B_FALSE; 986c6065d0fSGeorge Wilson 987b24ab676SJeff Bonwick if (vd != NULL || error == 0) 988b24ab676SJeff Bonwick vdev_dtl_reassess(vd ? vd->vdev_top : spa->spa_root_vdev, 989b24ab676SJeff Bonwick 0, 0, B_FALSE); 990b24ab676SJeff Bonwick 9918f18d1faSGeorge Wilson if (vd != NULL) { 992e14bb325SJeff Bonwick vdev_state_dirty(vd->vdev_top); 993c6065d0fSGeorge Wilson config_changed = B_TRUE; 9948f18d1faSGeorge Wilson spa->spa_config_generation++; 9958f18d1faSGeorge Wilson } 996e14bb325SJeff Bonwick 997dcba9f3fSGeorge Wilson if (spa_is_root(spa)) 998dcba9f3fSGeorge Wilson vdev_rele(spa->spa_root_vdev); 999dcba9f3fSGeorge Wilson 10008f18d1faSGeorge Wilson ASSERT3U(spa->spa_vdev_locks, >=, SCL_STATE_ALL); 10018f18d1faSGeorge Wilson spa_config_exit(spa, spa->spa_vdev_locks, spa); 1002e14bb325SJeff Bonwick 10038ad4d6ddSJeff Bonwick /* 10048ad4d6ddSJeff Bonwick * If anything changed, wait for it to sync. This ensures that, 10058ad4d6ddSJeff Bonwick * from the system administrator's perspective, zpool(1M) commands 10068ad4d6ddSJeff Bonwick * are synchronous. This is important for things like zpool offline: 10078ad4d6ddSJeff Bonwick * when the command completes, you expect no further I/O from ZFS. 10088ad4d6ddSJeff Bonwick */ 10098ad4d6ddSJeff Bonwick if (vd != NULL) 10108ad4d6ddSJeff Bonwick txg_wait_synced(spa->spa_dsl_pool, 0); 10118ad4d6ddSJeff Bonwick 1012c6065d0fSGeorge Wilson /* 1013c6065d0fSGeorge Wilson * If the config changed, update the config cache. 1014c6065d0fSGeorge Wilson */ 1015c6065d0fSGeorge Wilson if (config_changed) { 1016c6065d0fSGeorge Wilson mutex_enter(&spa_namespace_lock); 1017c6065d0fSGeorge Wilson spa_config_sync(spa, B_FALSE, B_TRUE); 1018c6065d0fSGeorge Wilson mutex_exit(&spa_namespace_lock); 1019c6065d0fSGeorge Wilson } 1020c6065d0fSGeorge Wilson 1021e14bb325SJeff Bonwick return (error); 1022e14bb325SJeff Bonwick } 1023e14bb325SJeff Bonwick 1024fa9e4066Sahrens /* 1025fa9e4066Sahrens * ========================================================================== 1026fa9e4066Sahrens * Miscellaneous functions 1027fa9e4066Sahrens * ========================================================================== 1028fa9e4066Sahrens */ 1029fa9e4066Sahrens 1030fa9e4066Sahrens /* 1031fa9e4066Sahrens * Rename a spa_t. 1032fa9e4066Sahrens */ 1033fa9e4066Sahrens int 1034fa9e4066Sahrens spa_rename(const char *name, const char *newname) 1035fa9e4066Sahrens { 1036fa9e4066Sahrens spa_t *spa; 1037fa9e4066Sahrens int err; 1038fa9e4066Sahrens 1039fa9e4066Sahrens /* 1040fa9e4066Sahrens * Lookup the spa_t and grab the config lock for writing. We need to 1041fa9e4066Sahrens * actually open the pool so that we can sync out the necessary labels. 1042fa9e4066Sahrens * It's OK to call spa_open() with the namespace lock held because we 1043ea8dc4b6Seschrock * allow recursive calls for other reasons. 1044fa9e4066Sahrens */ 1045fa9e4066Sahrens mutex_enter(&spa_namespace_lock); 1046fa9e4066Sahrens if ((err = spa_open(name, &spa, FTAG)) != 0) { 1047fa9e4066Sahrens mutex_exit(&spa_namespace_lock); 1048fa9e4066Sahrens return (err); 1049fa9e4066Sahrens } 1050fa9e4066Sahrens 1051e14bb325SJeff Bonwick spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1052fa9e4066Sahrens 1053fa9e4066Sahrens avl_remove(&spa_namespace_avl, spa); 1054e14bb325SJeff Bonwick (void) strlcpy(spa->spa_name, newname, sizeof (spa->spa_name)); 1055fa9e4066Sahrens avl_add(&spa_namespace_avl, spa); 1056fa9e4066Sahrens 1057fa9e4066Sahrens /* 1058fa9e4066Sahrens * Sync all labels to disk with the new names by marking the root vdev 1059fa9e4066Sahrens * dirty and waiting for it to sync. It will pick up the new pool name 1060fa9e4066Sahrens * during the sync. 1061fa9e4066Sahrens */ 1062fa9e4066Sahrens vdev_config_dirty(spa->spa_root_vdev); 1063fa9e4066Sahrens 1064e14bb325SJeff Bonwick spa_config_exit(spa, SCL_ALL, FTAG); 1065fa9e4066Sahrens 10660373e76bSbonwick txg_wait_synced(spa->spa_dsl_pool, 0); 1067fa9e4066Sahrens 1068fa9e4066Sahrens /* 1069fa9e4066Sahrens * Sync the updated config cache. 1070fa9e4066Sahrens */ 1071c5904d13Seschrock spa_config_sync(spa, B_FALSE, B_TRUE); 1072fa9e4066Sahrens 1073fa9e4066Sahrens spa_close(spa, FTAG); 1074fa9e4066Sahrens 1075fa9e4066Sahrens mutex_exit(&spa_namespace_lock); 1076fa9e4066Sahrens 1077fa9e4066Sahrens return (0); 1078fa9e4066Sahrens } 1079fa9e4066Sahrens 1080fa9e4066Sahrens /* 1081fa9e4066Sahrens * Determine whether a pool with given pool_guid exists. If device_guid is 1082fa9e4066Sahrens * non-zero, determine whether the pool exists *and* contains a device with the 1083fa9e4066Sahrens * specified device_guid. 1084fa9e4066Sahrens */ 1085fa9e4066Sahrens boolean_t 1086fa9e4066Sahrens spa_guid_exists(uint64_t pool_guid, uint64_t device_guid) 1087fa9e4066Sahrens { 1088fa9e4066Sahrens spa_t *spa; 1089fa9e4066Sahrens avl_tree_t *t = &spa_namespace_avl; 1090fa9e4066Sahrens 1091ea8dc4b6Seschrock ASSERT(MUTEX_HELD(&spa_namespace_lock)); 1092fa9e4066Sahrens 1093fa9e4066Sahrens for (spa = avl_first(t); spa != NULL; spa = AVL_NEXT(t, spa)) { 1094fa9e4066Sahrens if (spa->spa_state == POOL_STATE_UNINITIALIZED) 1095fa9e4066Sahrens continue; 1096fa9e4066Sahrens if (spa->spa_root_vdev == NULL) 1097fa9e4066Sahrens continue; 109839c23413Seschrock if (spa_guid(spa) == pool_guid) { 109939c23413Seschrock if (device_guid == 0) 110039c23413Seschrock break; 110139c23413Seschrock 110239c23413Seschrock if (vdev_lookup_by_guid(spa->spa_root_vdev, 110339c23413Seschrock device_guid) != NULL) 110439c23413Seschrock break; 110539c23413Seschrock 110639c23413Seschrock /* 11078654d025Sperrin * Check any devices we may be in the process of adding. 110839c23413Seschrock */ 110939c23413Seschrock if (spa->spa_pending_vdev) { 111039c23413Seschrock if (vdev_lookup_by_guid(spa->spa_pending_vdev, 111139c23413Seschrock device_guid) != NULL) 111239c23413Seschrock break; 111339c23413Seschrock } 111439c23413Seschrock } 1115fa9e4066Sahrens } 1116fa9e4066Sahrens 1117fa9e4066Sahrens return (spa != NULL); 1118fa9e4066Sahrens } 1119fa9e4066Sahrens 1120fa9e4066Sahrens char * 1121fa9e4066Sahrens spa_strdup(const char *s) 1122fa9e4066Sahrens { 1123fa9e4066Sahrens size_t len; 1124fa9e4066Sahrens char *new; 1125fa9e4066Sahrens 1126fa9e4066Sahrens len = strlen(s); 1127fa9e4066Sahrens new = kmem_alloc(len + 1, KM_SLEEP); 1128fa9e4066Sahrens bcopy(s, new, len); 1129fa9e4066Sahrens new[len] = '\0'; 1130fa9e4066Sahrens 1131fa9e4066Sahrens return (new); 1132fa9e4066Sahrens } 1133fa9e4066Sahrens 1134fa9e4066Sahrens void 1135fa9e4066Sahrens spa_strfree(char *s) 1136fa9e4066Sahrens { 1137fa9e4066Sahrens kmem_free(s, strlen(s) + 1); 1138fa9e4066Sahrens } 1139fa9e4066Sahrens 1140fa9e4066Sahrens uint64_t 1141fa9e4066Sahrens spa_get_random(uint64_t range) 1142fa9e4066Sahrens { 1143fa9e4066Sahrens uint64_t r; 1144fa9e4066Sahrens 1145fa9e4066Sahrens ASSERT(range != 0); 1146fa9e4066Sahrens 1147fa9e4066Sahrens (void) random_get_pseudo_bytes((void *)&r, sizeof (uint64_t)); 1148fa9e4066Sahrens 1149fa9e4066Sahrens return (r % range); 1150fa9e4066Sahrens } 1151fa9e4066Sahrens 11521195e687SMark J Musante uint64_t 11531195e687SMark J Musante spa_generate_guid(spa_t *spa) 11541195e687SMark J Musante { 11551195e687SMark J Musante uint64_t guid = spa_get_random(-1ULL); 11561195e687SMark J Musante 11571195e687SMark J Musante if (spa != NULL) { 11581195e687SMark J Musante while (guid == 0 || spa_guid_exists(spa_guid(spa), guid)) 11591195e687SMark J Musante guid = spa_get_random(-1ULL); 11601195e687SMark J Musante } else { 11611195e687SMark J Musante while (guid == 0 || spa_guid_exists(guid, 0)) 11621195e687SMark J Musante guid = spa_get_random(-1ULL); 11631195e687SMark J Musante } 11641195e687SMark J Musante 11651195e687SMark J Musante return (guid); 11661195e687SMark J Musante } 11671195e687SMark J Musante 1168fa9e4066Sahrens void 1169b24ab676SJeff Bonwick sprintf_blkptr(char *buf, const blkptr_t *bp) 1170fa9e4066Sahrens { 1171f0ba89beSJeff Bonwick char *type = NULL; 1172f0ba89beSJeff Bonwick char *checksum = NULL; 1173f0ba89beSJeff Bonwick char *compress = NULL; 1174f0ba89beSJeff Bonwick 1175f0ba89beSJeff Bonwick if (bp != NULL) { 1176f0ba89beSJeff Bonwick type = dmu_ot[BP_GET_TYPE(bp)].ot_name; 1177f0ba89beSJeff Bonwick checksum = zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_name; 1178f0ba89beSJeff Bonwick compress = zio_compress_table[BP_GET_COMPRESS(bp)].ci_name; 1179f0ba89beSJeff Bonwick } 1180fa9e4066Sahrens 1181b24ab676SJeff Bonwick SPRINTF_BLKPTR(snprintf, ' ', buf, bp, type, checksum, compress); 1182fa9e4066Sahrens } 1183fa9e4066Sahrens 1184fa9e4066Sahrens void 1185fa9e4066Sahrens spa_freeze(spa_t *spa) 1186fa9e4066Sahrens { 1187fa9e4066Sahrens uint64_t freeze_txg = 0; 1188fa9e4066Sahrens 1189e14bb325SJeff Bonwick spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1190fa9e4066Sahrens if (spa->spa_freeze_txg == UINT64_MAX) { 1191fa9e4066Sahrens freeze_txg = spa_last_synced_txg(spa) + TXG_SIZE; 1192fa9e4066Sahrens spa->spa_freeze_txg = freeze_txg; 1193fa9e4066Sahrens } 1194e14bb325SJeff Bonwick spa_config_exit(spa, SCL_ALL, FTAG); 1195fa9e4066Sahrens if (freeze_txg != 0) 1196fa9e4066Sahrens txg_wait_synced(spa_get_dsl(spa), freeze_txg); 1197fa9e4066Sahrens } 1198fa9e4066Sahrens 11990125049cSahrens void 12000125049cSahrens zfs_panic_recover(const char *fmt, ...) 12010125049cSahrens { 12020125049cSahrens va_list adx; 12030125049cSahrens 12040125049cSahrens va_start(adx, fmt); 12050125049cSahrens vcmn_err(zfs_recover ? CE_WARN : CE_PANIC, fmt, adx); 12060125049cSahrens va_end(adx); 12070125049cSahrens } 12080125049cSahrens 12093f9d6ad7SLin Ling /* 12103f9d6ad7SLin Ling * This is a stripped-down version of strtoull, suitable only for converting 12113f9d6ad7SLin Ling * lowercase hexidecimal numbers that don't overflow. 12123f9d6ad7SLin Ling */ 12133f9d6ad7SLin Ling uint64_t 12143f9d6ad7SLin Ling strtonum(const char *str, char **nptr) 12153f9d6ad7SLin Ling { 12163f9d6ad7SLin Ling uint64_t val = 0; 12173f9d6ad7SLin Ling char c; 12183f9d6ad7SLin Ling int digit; 12193f9d6ad7SLin Ling 12203f9d6ad7SLin Ling while ((c = *str) != '\0') { 12213f9d6ad7SLin Ling if (c >= '0' && c <= '9') 12223f9d6ad7SLin Ling digit = c - '0'; 12233f9d6ad7SLin Ling else if (c >= 'a' && c <= 'f') 12243f9d6ad7SLin Ling digit = 10 + c - 'a'; 12253f9d6ad7SLin Ling else 12263f9d6ad7SLin Ling break; 12273f9d6ad7SLin Ling 12283f9d6ad7SLin Ling val *= 16; 12293f9d6ad7SLin Ling val += digit; 12303f9d6ad7SLin Ling 12313f9d6ad7SLin Ling str++; 12323f9d6ad7SLin Ling } 12333f9d6ad7SLin Ling 12343f9d6ad7SLin Ling if (nptr) 12353f9d6ad7SLin Ling *nptr = (char *)str; 12363f9d6ad7SLin Ling 12373f9d6ad7SLin Ling return (val); 12383f9d6ad7SLin Ling } 12393f9d6ad7SLin Ling 1240fa9e4066Sahrens /* 1241fa9e4066Sahrens * ========================================================================== 1242fa9e4066Sahrens * Accessor functions 1243fa9e4066Sahrens * ========================================================================== 1244fa9e4066Sahrens */ 1245fa9e4066Sahrens 1246088f3894Sahrens boolean_t 124788b7b0f2SMatthew Ahrens spa_shutting_down(spa_t *spa) 1248fa9e4066Sahrens { 124988b7b0f2SMatthew Ahrens return (spa->spa_async_suspended); 1250fa9e4066Sahrens } 1251fa9e4066Sahrens 1252fa9e4066Sahrens dsl_pool_t * 1253fa9e4066Sahrens spa_get_dsl(spa_t *spa) 1254fa9e4066Sahrens { 1255fa9e4066Sahrens return (spa->spa_dsl_pool); 1256fa9e4066Sahrens } 1257fa9e4066Sahrens 1258fa9e4066Sahrens blkptr_t * 1259fa9e4066Sahrens spa_get_rootblkptr(spa_t *spa) 1260fa9e4066Sahrens { 1261fa9e4066Sahrens return (&spa->spa_ubsync.ub_rootbp); 1262fa9e4066Sahrens } 1263fa9e4066Sahrens 1264fa9e4066Sahrens void 1265fa9e4066Sahrens spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp) 1266fa9e4066Sahrens { 1267fa9e4066Sahrens spa->spa_uberblock.ub_rootbp = *bp; 1268fa9e4066Sahrens } 1269fa9e4066Sahrens 1270fa9e4066Sahrens void 1271fa9e4066Sahrens spa_altroot(spa_t *spa, char *buf, size_t buflen) 1272fa9e4066Sahrens { 1273fa9e4066Sahrens if (spa->spa_root == NULL) 1274fa9e4066Sahrens buf[0] = '\0'; 1275fa9e4066Sahrens else 1276fa9e4066Sahrens (void) strncpy(buf, spa->spa_root, buflen); 1277fa9e4066Sahrens } 1278fa9e4066Sahrens 1279fa9e4066Sahrens int 1280fa9e4066Sahrens spa_sync_pass(spa_t *spa) 1281fa9e4066Sahrens { 1282fa9e4066Sahrens return (spa->spa_sync_pass); 1283fa9e4066Sahrens } 1284fa9e4066Sahrens 1285fa9e4066Sahrens char * 1286fa9e4066Sahrens spa_name(spa_t *spa) 1287fa9e4066Sahrens { 1288fa9e4066Sahrens return (spa->spa_name); 1289fa9e4066Sahrens } 1290fa9e4066Sahrens 1291fa9e4066Sahrens uint64_t 1292fa9e4066Sahrens spa_guid(spa_t *spa) 1293fa9e4066Sahrens { 1294b5989ec7Seschrock /* 1295b5989ec7Seschrock * If we fail to parse the config during spa_load(), we can go through 1296b5989ec7Seschrock * the error path (which posts an ereport) and end up here with no root 1297b5989ec7Seschrock * vdev. We stash the original pool guid in 'spa_load_guid' to handle 1298b5989ec7Seschrock * this case. 1299b5989ec7Seschrock */ 1300b5989ec7Seschrock if (spa->spa_root_vdev != NULL) 1301b5989ec7Seschrock return (spa->spa_root_vdev->vdev_guid); 1302b5989ec7Seschrock else 1303b5989ec7Seschrock return (spa->spa_load_guid); 1304fa9e4066Sahrens } 1305fa9e4066Sahrens 1306fa9e4066Sahrens uint64_t 1307fa9e4066Sahrens spa_last_synced_txg(spa_t *spa) 1308fa9e4066Sahrens { 1309fa9e4066Sahrens return (spa->spa_ubsync.ub_txg); 1310fa9e4066Sahrens } 1311fa9e4066Sahrens 1312fa9e4066Sahrens uint64_t 1313fa9e4066Sahrens spa_first_txg(spa_t *spa) 1314fa9e4066Sahrens { 1315fa9e4066Sahrens return (spa->spa_first_txg); 1316fa9e4066Sahrens } 1317fa9e4066Sahrens 1318b24ab676SJeff Bonwick uint64_t 1319b24ab676SJeff Bonwick spa_syncing_txg(spa_t *spa) 1320b24ab676SJeff Bonwick { 1321b24ab676SJeff Bonwick return (spa->spa_syncing_txg); 1322b24ab676SJeff Bonwick } 1323b24ab676SJeff Bonwick 132488b7b0f2SMatthew Ahrens pool_state_t 1325fa9e4066Sahrens spa_state(spa_t *spa) 1326fa9e4066Sahrens { 1327fa9e4066Sahrens return (spa->spa_state); 1328fa9e4066Sahrens } 1329fa9e4066Sahrens 1330b16da2e2SGeorge Wilson spa_load_state_t 1331b16da2e2SGeorge Wilson spa_load_state(spa_t *spa) 1332b16da2e2SGeorge Wilson { 1333b16da2e2SGeorge Wilson return (spa->spa_load_state); 1334b16da2e2SGeorge Wilson } 1335b16da2e2SGeorge Wilson 1336fa9e4066Sahrens uint64_t 1337fa9e4066Sahrens spa_freeze_txg(spa_t *spa) 1338fa9e4066Sahrens { 1339fa9e4066Sahrens return (spa->spa_freeze_txg); 1340fa9e4066Sahrens } 1341fa9e4066Sahrens 1342fa9e4066Sahrens /* ARGSUSED */ 1343fa9e4066Sahrens uint64_t 1344fa9e4066Sahrens spa_get_asize(spa_t *spa, uint64_t lsize) 1345fa9e4066Sahrens { 1346fa9e4066Sahrens /* 1347b24ab676SJeff Bonwick * The worst case is single-sector max-parity RAID-Z blocks, in which 1348b24ab676SJeff Bonwick * case the space requirement is exactly (VDEV_RAIDZ_MAXPARITY + 1) 1349b24ab676SJeff Bonwick * times the size; so just assume that. Add to this the fact that 1350b24ab676SJeff Bonwick * we can have up to 3 DVAs per bp, and one more factor of 2 because 1351b24ab676SJeff Bonwick * the block may be dittoed with up to 3 DVAs by ddt_sync(). 135244cd46caSbillm */ 1353b24ab676SJeff Bonwick return (lsize * (VDEV_RAIDZ_MAXPARITY + 1) * SPA_DVAS_PER_BP * 2); 135444cd46caSbillm } 135544cd46caSbillm 1356485bbbf5SGeorge Wilson uint64_t 1357485bbbf5SGeorge Wilson spa_get_dspace(spa_t *spa) 1358485bbbf5SGeorge Wilson { 1359485bbbf5SGeorge Wilson return (spa->spa_dspace); 1360485bbbf5SGeorge Wilson } 1361485bbbf5SGeorge Wilson 1362485bbbf5SGeorge Wilson void 1363485bbbf5SGeorge Wilson spa_update_dspace(spa_t *spa) 1364485bbbf5SGeorge Wilson { 1365485bbbf5SGeorge Wilson spa->spa_dspace = metaslab_class_get_dspace(spa_normal_class(spa)) + 1366485bbbf5SGeorge Wilson ddt_get_dedup_dspace(spa); 1367485bbbf5SGeorge Wilson } 1368485bbbf5SGeorge Wilson 13690a4e9518Sgw /* 13700a4e9518Sgw * Return the failure mode that has been set to this pool. The default 13710a4e9518Sgw * behavior will be to block all I/Os when a complete failure occurs. 13720a4e9518Sgw */ 13730a4e9518Sgw uint8_t 13740a4e9518Sgw spa_get_failmode(spa_t *spa) 13750a4e9518Sgw { 13760a4e9518Sgw return (spa->spa_failmode); 13770a4e9518Sgw } 13780a4e9518Sgw 1379e14bb325SJeff Bonwick boolean_t 1380e14bb325SJeff Bonwick spa_suspended(spa_t *spa) 1381e14bb325SJeff Bonwick { 1382e14bb325SJeff Bonwick return (spa->spa_suspended); 1383e14bb325SJeff Bonwick } 1384e14bb325SJeff Bonwick 138544cd46caSbillm uint64_t 138644cd46caSbillm spa_version(spa_t *spa) 138744cd46caSbillm { 138844cd46caSbillm return (spa->spa_ubsync.ub_version); 138944cd46caSbillm } 139044cd46caSbillm 1391b24ab676SJeff Bonwick boolean_t 1392b24ab676SJeff Bonwick spa_deflate(spa_t *spa) 1393b24ab676SJeff Bonwick { 1394b24ab676SJeff Bonwick return (spa->spa_deflate); 1395b24ab676SJeff Bonwick } 1396b24ab676SJeff Bonwick 1397b24ab676SJeff Bonwick metaslab_class_t * 1398b24ab676SJeff Bonwick spa_normal_class(spa_t *spa) 1399b24ab676SJeff Bonwick { 1400b24ab676SJeff Bonwick return (spa->spa_normal_class); 1401b24ab676SJeff Bonwick } 1402b24ab676SJeff Bonwick 1403b24ab676SJeff Bonwick metaslab_class_t * 1404b24ab676SJeff Bonwick spa_log_class(spa_t *spa) 1405b24ab676SJeff Bonwick { 1406b24ab676SJeff Bonwick return (spa->spa_log_class); 1407b24ab676SJeff Bonwick } 1408b24ab676SJeff Bonwick 140944cd46caSbillm int 141044cd46caSbillm spa_max_replication(spa_t *spa) 141144cd46caSbillm { 141244cd46caSbillm /* 1413e7437265Sahrens * As of SPA_VERSION == SPA_VERSION_DITTO_BLOCKS, we are able to 141444cd46caSbillm * handle BPs with more than one DVA allocated. Set our max 141544cd46caSbillm * replication level accordingly. 1416fa9e4066Sahrens */ 1417e7437265Sahrens if (spa_version(spa) < SPA_VERSION_DITTO_BLOCKS) 141844cd46caSbillm return (1); 141944cd46caSbillm return (MIN(SPA_DVAS_PER_BP, spa_max_replication_override)); 1420fa9e4066Sahrens } 1421fa9e4066Sahrens 14223f9d6ad7SLin Ling int 14233f9d6ad7SLin Ling spa_prev_software_version(spa_t *spa) 14243f9d6ad7SLin Ling { 14253f9d6ad7SLin Ling return (spa->spa_prev_software_version); 14263f9d6ad7SLin Ling } 14273f9d6ad7SLin Ling 142899653d4eSeschrock uint64_t 1429b24ab676SJeff Bonwick dva_get_dsize_sync(spa_t *spa, const dva_t *dva) 143099653d4eSeschrock { 1431b24ab676SJeff Bonwick uint64_t asize = DVA_GET_ASIZE(dva); 1432b24ab676SJeff Bonwick uint64_t dsize = asize; 143399653d4eSeschrock 1434b24ab676SJeff Bonwick ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); 143599653d4eSeschrock 1436b24ab676SJeff Bonwick if (asize != 0 && spa->spa_deflate) { 1437b24ab676SJeff Bonwick vdev_t *vd = vdev_lookup_top(spa, DVA_GET_VDEV(dva)); 1438b24ab676SJeff Bonwick dsize = (asize >> SPA_MINBLOCKSHIFT) * vd->vdev_deflate_ratio; 143999653d4eSeschrock } 1440b24ab676SJeff Bonwick 1441b24ab676SJeff Bonwick return (dsize); 1442b24ab676SJeff Bonwick } 1443b24ab676SJeff Bonwick 1444b24ab676SJeff Bonwick uint64_t 1445b24ab676SJeff Bonwick bp_get_dsize_sync(spa_t *spa, const blkptr_t *bp) 1446b24ab676SJeff Bonwick { 1447b24ab676SJeff Bonwick uint64_t dsize = 0; 1448b24ab676SJeff Bonwick 1449b24ab676SJeff Bonwick for (int d = 0; d < SPA_DVAS_PER_BP; d++) 1450b24ab676SJeff Bonwick dsize += dva_get_dsize_sync(spa, &bp->blk_dva[d]); 1451b24ab676SJeff Bonwick 1452b24ab676SJeff Bonwick return (dsize); 1453b24ab676SJeff Bonwick } 1454b24ab676SJeff Bonwick 1455b24ab676SJeff Bonwick uint64_t 1456b24ab676SJeff Bonwick bp_get_dsize(spa_t *spa, const blkptr_t *bp) 1457b24ab676SJeff Bonwick { 1458b24ab676SJeff Bonwick uint64_t dsize = 0; 1459b24ab676SJeff Bonwick 1460b24ab676SJeff Bonwick spa_config_enter(spa, SCL_VDEV, FTAG, RW_READER); 1461b24ab676SJeff Bonwick 1462b24ab676SJeff Bonwick for (int d = 0; d < SPA_DVAS_PER_BP; d++) 1463b24ab676SJeff Bonwick dsize += dva_get_dsize_sync(spa, &bp->blk_dva[d]); 1464b24ab676SJeff Bonwick 1465e14bb325SJeff Bonwick spa_config_exit(spa, SCL_VDEV, FTAG); 1466b24ab676SJeff Bonwick 1467b24ab676SJeff Bonwick return (dsize); 146899653d4eSeschrock } 146999653d4eSeschrock 1470fa9e4066Sahrens /* 1471fa9e4066Sahrens * ========================================================================== 1472fa9e4066Sahrens * Initialization and Termination 1473fa9e4066Sahrens * ========================================================================== 1474fa9e4066Sahrens */ 1475fa9e4066Sahrens 1476fa9e4066Sahrens static int 1477fa9e4066Sahrens spa_name_compare(const void *a1, const void *a2) 1478fa9e4066Sahrens { 1479fa9e4066Sahrens const spa_t *s1 = a1; 1480fa9e4066Sahrens const spa_t *s2 = a2; 1481fa9e4066Sahrens int s; 1482fa9e4066Sahrens 1483fa9e4066Sahrens s = strcmp(s1->spa_name, s2->spa_name); 1484fa9e4066Sahrens if (s > 0) 1485fa9e4066Sahrens return (1); 1486fa9e4066Sahrens if (s < 0) 1487fa9e4066Sahrens return (-1); 1488fa9e4066Sahrens return (0); 1489fa9e4066Sahrens } 1490fa9e4066Sahrens 14910373e76bSbonwick int 14920373e76bSbonwick spa_busy(void) 14930373e76bSbonwick { 14940373e76bSbonwick return (spa_active_count); 14950373e76bSbonwick } 14960373e76bSbonwick 1497e7cbe64fSgw void 1498e7cbe64fSgw spa_boot_init() 1499e7cbe64fSgw { 1500e7cbe64fSgw spa_config_load(); 1501e7cbe64fSgw } 1502e7cbe64fSgw 1503fa9e4066Sahrens void 1504fa9e4066Sahrens spa_init(int mode) 1505fa9e4066Sahrens { 1506fa9e4066Sahrens mutex_init(&spa_namespace_lock, NULL, MUTEX_DEFAULT, NULL); 1507c25056deSgw mutex_init(&spa_spare_lock, NULL, MUTEX_DEFAULT, NULL); 1508fa94a07fSbrendan mutex_init(&spa_l2cache_lock, NULL, MUTEX_DEFAULT, NULL); 1509fa9e4066Sahrens cv_init(&spa_namespace_cv, NULL, CV_DEFAULT, NULL); 1510fa9e4066Sahrens 1511fa9e4066Sahrens avl_create(&spa_namespace_avl, spa_name_compare, sizeof (spa_t), 1512fa9e4066Sahrens offsetof(spa_t, spa_avl)); 1513fa9e4066Sahrens 1514fa94a07fSbrendan avl_create(&spa_spare_avl, spa_spare_compare, sizeof (spa_aux_t), 1515fa94a07fSbrendan offsetof(spa_aux_t, aux_avl)); 1516fa94a07fSbrendan 1517fa94a07fSbrendan avl_create(&spa_l2cache_avl, spa_l2cache_compare, sizeof (spa_aux_t), 1518fa94a07fSbrendan offsetof(spa_aux_t, aux_avl)); 151999653d4eSeschrock 15208ad4d6ddSJeff Bonwick spa_mode_global = mode; 1521fa9e4066Sahrens 1522fa9e4066Sahrens refcount_init(); 1523fa9e4066Sahrens unique_init(); 1524fa9e4066Sahrens zio_init(); 1525fa9e4066Sahrens dmu_init(); 1526fa9e4066Sahrens zil_init(); 152787db74c1Sek vdev_cache_stat_init(); 152891ebeef5Sahrens zfs_prop_init(); 1529990b4856Slling zpool_prop_init(); 1530fa9e4066Sahrens spa_config_load(); 1531e14bb325SJeff Bonwick l2arc_start(); 1532fa9e4066Sahrens } 1533fa9e4066Sahrens 1534fa9e4066Sahrens void 1535fa9e4066Sahrens spa_fini(void) 1536fa9e4066Sahrens { 1537e14bb325SJeff Bonwick l2arc_stop(); 1538e14bb325SJeff Bonwick 1539fa9e4066Sahrens spa_evict_all(); 1540fa9e4066Sahrens 154187db74c1Sek vdev_cache_stat_fini(); 1542fa9e4066Sahrens zil_fini(); 1543fa9e4066Sahrens dmu_fini(); 1544fa9e4066Sahrens zio_fini(); 154591ebeef5Sahrens unique_fini(); 1546fa9e4066Sahrens refcount_fini(); 1547fa9e4066Sahrens 1548fa9e4066Sahrens avl_destroy(&spa_namespace_avl); 154999653d4eSeschrock avl_destroy(&spa_spare_avl); 1550fa94a07fSbrendan avl_destroy(&spa_l2cache_avl); 1551fa9e4066Sahrens 1552fa9e4066Sahrens cv_destroy(&spa_namespace_cv); 1553fa9e4066Sahrens mutex_destroy(&spa_namespace_lock); 1554c25056deSgw mutex_destroy(&spa_spare_lock); 1555fa94a07fSbrendan mutex_destroy(&spa_l2cache_lock); 1556fa9e4066Sahrens } 15576ce0521aSperrin 15586ce0521aSperrin /* 15596ce0521aSperrin * Return whether this pool has slogs. No locking needed. 15606ce0521aSperrin * It's not a problem if the wrong answer is returned as it's only for 15616ce0521aSperrin * performance and not correctness 15626ce0521aSperrin */ 15636ce0521aSperrin boolean_t 15646ce0521aSperrin spa_has_slogs(spa_t *spa) 15656ce0521aSperrin { 15666ce0521aSperrin return (spa->spa_log_class->mc_rotor != NULL); 15676ce0521aSperrin } 1568bf82a41bSeschrock 1569b24ab676SJeff Bonwick spa_log_state_t 1570b24ab676SJeff Bonwick spa_get_log_state(spa_t *spa) 1571b24ab676SJeff Bonwick { 1572b24ab676SJeff Bonwick return (spa->spa_log_state); 1573b24ab676SJeff Bonwick } 1574b24ab676SJeff Bonwick 1575b24ab676SJeff Bonwick void 1576b24ab676SJeff Bonwick spa_set_log_state(spa_t *spa, spa_log_state_t state) 1577b24ab676SJeff Bonwick { 1578b24ab676SJeff Bonwick spa->spa_log_state = state; 1579b24ab676SJeff Bonwick } 1580b24ab676SJeff Bonwick 1581bf82a41bSeschrock boolean_t 1582bf82a41bSeschrock spa_is_root(spa_t *spa) 1583bf82a41bSeschrock { 1584bf82a41bSeschrock return (spa->spa_is_root); 1585bf82a41bSeschrock } 15868ad4d6ddSJeff Bonwick 15878ad4d6ddSJeff Bonwick boolean_t 15888ad4d6ddSJeff Bonwick spa_writeable(spa_t *spa) 15898ad4d6ddSJeff Bonwick { 15908ad4d6ddSJeff Bonwick return (!!(spa->spa_mode & FWRITE)); 15918ad4d6ddSJeff Bonwick } 15928ad4d6ddSJeff Bonwick 15938ad4d6ddSJeff Bonwick int 15948ad4d6ddSJeff Bonwick spa_mode(spa_t *spa) 15958ad4d6ddSJeff Bonwick { 15968ad4d6ddSJeff Bonwick return (spa->spa_mode); 15978ad4d6ddSJeff Bonwick } 1598b24ab676SJeff Bonwick 1599b24ab676SJeff Bonwick uint64_t 1600b24ab676SJeff Bonwick spa_bootfs(spa_t *spa) 1601b24ab676SJeff Bonwick { 1602b24ab676SJeff Bonwick return (spa->spa_bootfs); 1603b24ab676SJeff Bonwick } 1604b24ab676SJeff Bonwick 1605b24ab676SJeff Bonwick uint64_t 1606b24ab676SJeff Bonwick spa_delegation(spa_t *spa) 1607b24ab676SJeff Bonwick { 1608b24ab676SJeff Bonwick return (spa->spa_delegation); 1609b24ab676SJeff Bonwick } 1610b24ab676SJeff Bonwick 1611b24ab676SJeff Bonwick objset_t * 1612b24ab676SJeff Bonwick spa_meta_objset(spa_t *spa) 1613b24ab676SJeff Bonwick { 1614b24ab676SJeff Bonwick return (spa->spa_meta_objset); 1615b24ab676SJeff Bonwick } 1616b24ab676SJeff Bonwick 1617b24ab676SJeff Bonwick enum zio_checksum 1618b24ab676SJeff Bonwick spa_dedup_checksum(spa_t *spa) 1619b24ab676SJeff Bonwick { 1620b24ab676SJeff Bonwick return (spa->spa_dedup_checksum); 1621b24ab676SJeff Bonwick } 16223f9d6ad7SLin Ling 16233f9d6ad7SLin Ling /* 16243f9d6ad7SLin Ling * Reset pool scan stat per scan pass (or reboot). 16253f9d6ad7SLin Ling */ 16263f9d6ad7SLin Ling void 16273f9d6ad7SLin Ling spa_scan_stat_init(spa_t *spa) 16283f9d6ad7SLin Ling { 16293f9d6ad7SLin Ling /* data not stored on disk */ 16303f9d6ad7SLin Ling spa->spa_scan_pass_start = gethrestime_sec(); 16313f9d6ad7SLin Ling spa->spa_scan_pass_exam = 0; 16323f9d6ad7SLin Ling vdev_scan_stat_init(spa->spa_root_vdev); 16333f9d6ad7SLin Ling } 16343f9d6ad7SLin Ling 16353f9d6ad7SLin Ling /* 16363f9d6ad7SLin Ling * Get scan stats for zpool status reports 16373f9d6ad7SLin Ling */ 16383f9d6ad7SLin Ling int 16393f9d6ad7SLin Ling spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps) 16403f9d6ad7SLin Ling { 16413f9d6ad7SLin Ling dsl_scan_t *scn = spa->spa_dsl_pool ? spa->spa_dsl_pool->dp_scan : NULL; 16423f9d6ad7SLin Ling 16433f9d6ad7SLin Ling if (scn == NULL || scn->scn_phys.scn_func == POOL_SCAN_NONE) 16443f9d6ad7SLin Ling return (ENOENT); 16453f9d6ad7SLin Ling bzero(ps, sizeof (pool_scan_stat_t)); 16463f9d6ad7SLin Ling 16473f9d6ad7SLin Ling /* data stored on disk */ 16483f9d6ad7SLin Ling ps->pss_func = scn->scn_phys.scn_func; 16493f9d6ad7SLin Ling ps->pss_start_time = scn->scn_phys.scn_start_time; 16503f9d6ad7SLin Ling ps->pss_end_time = scn->scn_phys.scn_end_time; 16513f9d6ad7SLin Ling ps->pss_to_examine = scn->scn_phys.scn_to_examine; 16523f9d6ad7SLin Ling ps->pss_examined = scn->scn_phys.scn_examined; 16533f9d6ad7SLin Ling ps->pss_to_process = scn->scn_phys.scn_to_process; 16543f9d6ad7SLin Ling ps->pss_processed = scn->scn_phys.scn_processed; 16553f9d6ad7SLin Ling ps->pss_errors = scn->scn_phys.scn_errors; 16563f9d6ad7SLin Ling ps->pss_state = scn->scn_phys.scn_state; 16573f9d6ad7SLin Ling 16583f9d6ad7SLin Ling /* data not stored on disk */ 16593f9d6ad7SLin Ling ps->pss_pass_start = spa->spa_scan_pass_start; 16603f9d6ad7SLin Ling ps->pss_pass_exam = spa->spa_scan_pass_exam; 16613f9d6ad7SLin Ling 16623f9d6ad7SLin Ling return (0); 16633f9d6ad7SLin Ling } 1664