1168404Spjd/* 2168404Spjd * CDDL HEADER START 3168404Spjd * 4168404Spjd * The contents of this file are subject to the terms of the 5168404Spjd * Common Development and Distribution License (the "License"). 6168404Spjd * You may not use this file except in compliance with the License. 7168404Spjd * 8168404Spjd * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9168404Spjd * or http://www.opensolaris.org/os/licensing. 10168404Spjd * See the License for the specific language governing permissions 11168404Spjd * and limitations under the License. 12168404Spjd * 13168404Spjd * When distributing Covered Code, include this CDDL HEADER in each 14168404Spjd * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15168404Spjd * If applicable, add the following below this CDDL HEADER, with the 16168404Spjd * fields enclosed by brackets "[]" replaced with your own identifying 17168404Spjd * information: Portions Copyright [yyyy] [name of copyright owner] 18168404Spjd * 19168404Spjd * CDDL HEADER END 20168404Spjd */ 21168404Spjd/* 22219089Spjd * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23285001Savg * Copyright (c) 2011, 2015 by Delphix. All rights reserved. 24228103Smm * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 25247265Smm * Copyright 2013 Martin Matuska <mm@FreeBSD.org>. All rights reserved. 26288549Smav * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 27290757Smav * Copyright 2013 Saso Kiselkov. All rights reserved. 28168404Spjd */ 29168404Spjd 30168404Spjd#include <sys/zfs_context.h> 31168404Spjd#include <sys/spa_impl.h> 32247265Smm#include <sys/spa_boot.h> 33168404Spjd#include <sys/zio.h> 34168404Spjd#include <sys/zio_checksum.h> 35168404Spjd#include <sys/zio_compress.h> 36168404Spjd#include <sys/dmu.h> 37168404Spjd#include <sys/dmu_tx.h> 38168404Spjd#include <sys/zap.h> 39168404Spjd#include <sys/zil.h> 40168404Spjd#include <sys/vdev_impl.h> 41168404Spjd#include <sys/metaslab.h> 42168404Spjd#include <sys/uberblock_impl.h> 43168404Spjd#include <sys/txg.h> 44168404Spjd#include <sys/avl.h> 45168404Spjd#include <sys/unique.h> 46168404Spjd#include <sys/dsl_pool.h> 47168404Spjd#include <sys/dsl_dir.h> 48168404Spjd#include <sys/dsl_prop.h> 49219089Spjd#include <sys/dsl_scan.h> 50168404Spjd#include <sys/fs/zfs.h> 51185029Spjd#include <sys/metaslab_impl.h> 52185029Spjd#include <sys/arc.h> 53219089Spjd#include <sys/ddt.h> 54185029Spjd#include "zfs_prop.h" 55290757Smav#include <sys/zfeature.h> 56168404Spjd 57168404Spjd/* 58168404Spjd * SPA locking 59168404Spjd * 60168404Spjd * There are four basic locks for managing spa_t structures: 61168404Spjd * 62168404Spjd * spa_namespace_lock (global mutex) 63168404Spjd * 64168404Spjd * This lock must be acquired to do any of the following: 65168404Spjd * 66168404Spjd * - Lookup a spa_t by name 67168404Spjd * - Add or remove a spa_t from the namespace 68168404Spjd * - Increase spa_refcount from non-zero 69168404Spjd * - Check if spa_refcount is zero 70168404Spjd * - Rename a spa_t 71168404Spjd * - add/remove/attach/detach devices 72168404Spjd * - Held for the duration of create/destroy/import/export 73168404Spjd * 74168404Spjd * It does not need to handle recursion. A create or destroy may 75168404Spjd * reference objects (files or zvols) in other pools, but by 76168404Spjd * definition they must have an existing reference, and will never need 77168404Spjd * to lookup a spa_t by name. 78168404Spjd * 79168404Spjd * spa_refcount (per-spa refcount_t protected by mutex) 80168404Spjd * 81168404Spjd * This reference count keep track of any active users of the spa_t. The 82168404Spjd * spa_t cannot be destroyed or freed while this is non-zero. Internally, 83168404Spjd * the refcount is never really 'zero' - opening a pool implicitly keeps 84185029Spjd * some references in the DMU. Internally we check against spa_minref, but 85168404Spjd * present the image of a zero/non-zero value to consumers. 86168404Spjd * 87185029Spjd * spa_config_lock[] (per-spa array of rwlocks) 88168404Spjd * 89185029Spjd * This protects the spa_t from config changes, and must be held in 90185029Spjd * the following circumstances: 91168404Spjd * 92168404Spjd * - RW_READER to perform I/O to the spa 93168404Spjd * - RW_WRITER to change the vdev config 94168404Spjd * 95168404Spjd * The locking order is fairly straightforward: 96168404Spjd * 97168404Spjd * spa_namespace_lock -> spa_refcount 98168404Spjd * 99168404Spjd * The namespace lock must be acquired to increase the refcount from 0 100168404Spjd * or to check if it is zero. 101168404Spjd * 102185029Spjd * spa_refcount -> spa_config_lock[] 103168404Spjd * 104168404Spjd * There must be at least one valid reference on the spa_t to acquire 105168404Spjd * the config lock. 106168404Spjd * 107185029Spjd * spa_namespace_lock -> spa_config_lock[] 108168404Spjd * 109168404Spjd * The namespace lock must always be taken before the config lock. 110168404Spjd * 111168404Spjd * 112185029Spjd * The spa_namespace_lock can be acquired directly and is globally visible. 113168404Spjd * 114185029Spjd * The namespace is manipulated using the following functions, all of which 115185029Spjd * require the spa_namespace_lock to be held. 116168404Spjd * 117168404Spjd * spa_lookup() Lookup a spa_t by name. 118168404Spjd * 119168404Spjd * spa_add() Create a new spa_t in the namespace. 120168404Spjd * 121168404Spjd * spa_remove() Remove a spa_t from the namespace. This also 122168404Spjd * frees up any memory associated with the spa_t. 123168404Spjd * 124168404Spjd * spa_next() Returns the next spa_t in the system, or the 125168404Spjd * first if NULL is passed. 126168404Spjd * 127168404Spjd * spa_evict_all() Shutdown and remove all spa_t structures in 128168404Spjd * the system. 129168404Spjd * 130168404Spjd * spa_guid_exists() Determine whether a pool/device guid exists. 131168404Spjd * 132168404Spjd * The spa_refcount is manipulated using the following functions: 133168404Spjd * 134168404Spjd * spa_open_ref() Adds a reference to the given spa_t. Must be 135168404Spjd * called with spa_namespace_lock held if the 136168404Spjd * refcount is currently zero. 137168404Spjd * 138168404Spjd * spa_close() Remove a reference from the spa_t. This will 139168404Spjd * not free the spa_t or remove it from the 140168404Spjd * namespace. No locking is required. 141168404Spjd * 142168404Spjd * spa_refcount_zero() Returns true if the refcount is currently 143168404Spjd * zero. Must be called with spa_namespace_lock 144168404Spjd * held. 145168404Spjd * 146185029Spjd * The spa_config_lock[] is an array of rwlocks, ordered as follows: 147185029Spjd * SCL_CONFIG > SCL_STATE > SCL_ALLOC > SCL_ZIO > SCL_FREE > SCL_VDEV. 148185029Spjd * spa_config_lock[] is manipulated with spa_config_{enter,exit,held}(). 149168404Spjd * 150185029Spjd * To read the configuration, it suffices to hold one of these locks as reader. 151185029Spjd * To modify the configuration, you must hold all locks as writer. To modify 152185029Spjd * vdev state without altering the vdev tree's topology (e.g. online/offline), 153185029Spjd * you must hold SCL_STATE and SCL_ZIO as writer. 154168404Spjd * 155185029Spjd * We use these distinct config locks to avoid recursive lock entry. 156185029Spjd * For example, spa_sync() (which holds SCL_CONFIG as reader) induces 157185029Spjd * block allocations (SCL_ALLOC), which may require reading space maps 158185029Spjd * from disk (dmu_read() -> zio_read() -> SCL_ZIO). 159168404Spjd * 160185029Spjd * The spa config locks cannot be normal rwlocks because we need the 161185029Spjd * ability to hand off ownership. For example, SCL_ZIO is acquired 162185029Spjd * by the issuing thread and later released by an interrupt thread. 163185029Spjd * They do, however, obey the usual write-wanted semantics to prevent 164185029Spjd * writer (i.e. system administrator) starvation. 165168404Spjd * 166185029Spjd * The lock acquisition rules are as follows: 167185029Spjd * 168185029Spjd * SCL_CONFIG 169185029Spjd * Protects changes to the vdev tree topology, such as vdev 170185029Spjd * add/remove/attach/detach. Protects the dirty config list 171185029Spjd * (spa_config_dirty_list) and the set of spares and l2arc devices. 172185029Spjd * 173185029Spjd * SCL_STATE 174185029Spjd * Protects changes to pool state and vdev state, such as vdev 175185029Spjd * online/offline/fault/degrade/clear. Protects the dirty state list 176185029Spjd * (spa_state_dirty_list) and global pool state (spa_state). 177185029Spjd * 178185029Spjd * SCL_ALLOC 179185029Spjd * Protects changes to metaslab groups and classes. 180185029Spjd * Held as reader by metaslab_alloc() and metaslab_claim(). 181185029Spjd * 182185029Spjd * SCL_ZIO 183185029Spjd * Held by bp-level zios (those which have no io_vd upon entry) 184185029Spjd * to prevent changes to the vdev tree. The bp-level zio implicitly 185185029Spjd * protects all of its vdev child zios, which do not hold SCL_ZIO. 186185029Spjd * 187185029Spjd * SCL_FREE 188185029Spjd * Protects changes to metaslab groups and classes. 189185029Spjd * Held as reader by metaslab_free(). SCL_FREE is distinct from 190185029Spjd * SCL_ALLOC, and lower than SCL_ZIO, so that we can safely free 191185029Spjd * blocks in zio_done() while another i/o that holds either 192185029Spjd * SCL_ALLOC or SCL_ZIO is waiting for this i/o to complete. 193185029Spjd * 194185029Spjd * SCL_VDEV 195185029Spjd * Held as reader to prevent changes to the vdev tree during trivial 196219089Spjd * inquiries such as bp_get_dsize(). SCL_VDEV is distinct from the 197185029Spjd * other locks, and lower than all of them, to ensure that it's safe 198185029Spjd * to acquire regardless of caller context. 199185029Spjd * 200185029Spjd * In addition, the following rules apply: 201185029Spjd * 202185029Spjd * (a) spa_props_lock protects pool properties, spa_config and spa_config_list. 203185029Spjd * The lock ordering is SCL_CONFIG > spa_props_lock. 204185029Spjd * 205185029Spjd * (b) I/O operations on leaf vdevs. For any zio operation that takes 206185029Spjd * an explicit vdev_t argument -- such as zio_ioctl(), zio_read_phys(), 207185029Spjd * or zio_write_phys() -- the caller must ensure that the config cannot 208185029Spjd * cannot change in the interim, and that the vdev cannot be reopened. 209185029Spjd * SCL_STATE as reader suffices for both. 210185029Spjd * 211168404Spjd * The vdev configuration is protected by spa_vdev_enter() / spa_vdev_exit(). 212168404Spjd * 213168404Spjd * spa_vdev_enter() Acquire the namespace lock and the config lock 214168404Spjd * for writing. 215168404Spjd * 216168404Spjd * spa_vdev_exit() Release the config lock, wait for all I/O 217168404Spjd * to complete, sync the updated configs to the 218168404Spjd * cache, and release the namespace lock. 219168404Spjd * 220185029Spjd * vdev state is protected by spa_vdev_state_enter() / spa_vdev_state_exit(). 221185029Spjd * Like spa_vdev_enter/exit, these are convenience wrappers -- the actual 222185029Spjd * locking is, always, based on spa_namespace_lock and spa_config_lock[]. 223185029Spjd * 224236884Smm * spa_rename() is also implemented within this file since it requires 225185029Spjd * manipulation of the namespace. 226168404Spjd */ 227168404Spjd 228168404Spjdstatic avl_tree_t spa_namespace_avl; 229168404Spjdkmutex_t spa_namespace_lock; 230168404Spjdstatic kcondvar_t spa_namespace_cv; 231168404Spjdstatic int spa_active_count; 232168404Spjdint spa_max_replication_override = SPA_DVAS_PER_BP; 233168404Spjd 234168404Spjdstatic kmutex_t spa_spare_lock; 235168404Spjdstatic avl_tree_t spa_spare_avl; 236185029Spjdstatic kmutex_t spa_l2cache_lock; 237185029Spjdstatic avl_tree_t spa_l2cache_avl; 238168404Spjd 239168404Spjdkmem_cache_t *spa_buffer_pool; 240209962Smmint spa_mode_global; 241168404Spjd 242168404Spjd#ifdef ZFS_DEBUG 243248571Smm/* Everything except dprintf and spa is on by default in debug builds */ 244248571Smmint zfs_flags = ~(ZFS_DEBUG_DPRINTF | ZFS_DEBUG_SPA); 245168404Spjd#else 246168404Spjdint zfs_flags = 0; 247168404Spjd#endif 248260731SavgSYSCTL_DECL(_debug); 249260731SavgTUNABLE_INT("debug.zfs_flags", &zfs_flags); 250260731SavgSYSCTL_INT(_debug, OID_AUTO, zfs_flags, CTLFLAG_RWTUN, &zfs_flags, 0, 251260731Savg "ZFS debug flags."); 252168404Spjd 253168404Spjd/* 254168404Spjd * zfs_recover can be set to nonzero to attempt to recover from 255168404Spjd * otherwise-fatal errors, typically caused by on-disk corruption. When 256168404Spjd * set, calls to zfs_panic_recover() will turn into warning messages. 257262120Savg * This should only be used as a last resort, as it typically results 258262120Savg * in leaked space, or worse. 259168404Spjd */ 260268650Sdelphijboolean_t zfs_recover = B_FALSE; 261168583SpjdSYSCTL_DECL(_vfs_zfs); 262168583SpjdTUNABLE_INT("vfs.zfs.recover", &zfs_recover); 263290712SsmhSYSCTL_INT(_vfs_zfs, OID_AUTO, recover, CTLFLAG_RWTUN, &zfs_recover, 0, 264168583Spjd "Try to recover from otherwise-fatal errors."); 265168404Spjd 266260763Savg/* 267268650Sdelphij * If destroy encounters an EIO while reading metadata (e.g. indirect 268268650Sdelphij * blocks), space referenced by the missing metadata can not be freed. 269268650Sdelphij * Normally this causes the background destroy to become "stalled", as 270268650Sdelphij * it is unable to make forward progress. While in this stalled state, 271268650Sdelphij * all remaining space to free from the error-encountering filesystem is 272268650Sdelphij * "temporarily leaked". Set this flag to cause it to ignore the EIO, 273268650Sdelphij * permanently leak the space from indirect blocks that can not be read, 274268650Sdelphij * and continue to free everything else that it can. 275268650Sdelphij * 276268650Sdelphij * The default, "stalling" behavior is useful if the storage partially 277268650Sdelphij * fails (i.e. some but not all i/os fail), and then later recovers. In 278268650Sdelphij * this case, we will be able to continue pool operations while it is 279268650Sdelphij * partially failed, and when it recovers, we can continue to free the 280268650Sdelphij * space, with no leaks. However, note that this case is actually 281268650Sdelphij * fairly rare. 282268650Sdelphij * 283268650Sdelphij * Typically pools either (a) fail completely (but perhaps temporarily, 284268650Sdelphij * e.g. a top-level vdev going offline), or (b) have localized, 285268650Sdelphij * permanent errors (e.g. disk returns the wrong data due to bit flip or 286268650Sdelphij * firmware bug). In case (a), this setting does not matter because the 287268650Sdelphij * pool will be suspended and the sync thread will not be able to make 288268650Sdelphij * forward progress regardless. In case (b), because the error is 289268650Sdelphij * permanent, the best we can do is leak the minimum amount of space, 290268650Sdelphij * which is what setting this flag will do. Therefore, it is reasonable 291268650Sdelphij * for this flag to normally be set, but we chose the more conservative 292268650Sdelphij * approach of not setting it, so that there is no possibility of 293268650Sdelphij * leaking space in the "partial temporary" failure case. 294268650Sdelphij */ 295268650Sdelphijboolean_t zfs_free_leak_on_eio = B_FALSE; 296268650Sdelphij 297268650Sdelphij/* 298260763Savg * Expiration time in milliseconds. This value has two meanings. First it is 299260763Savg * used to determine when the spa_deadman() logic should fire. By default the 300260763Savg * spa_deadman() will fire if spa_sync() has not completed in 1000 seconds. 301260763Savg * Secondly, the value determines if an I/O is considered "hung". Any I/O that 302260763Savg * has not completed in zfs_deadman_synctime_ms is considered "hung" resulting 303260763Savg * in a system panic. 304260763Savg */ 305260763Savguint64_t zfs_deadman_synctime_ms = 1000000ULL; 306260763SavgTUNABLE_QUAD("vfs.zfs.deadman_synctime_ms", &zfs_deadman_synctime_ms); 307260763SavgSYSCTL_UQUAD(_vfs_zfs, OID_AUTO, deadman_synctime_ms, CTLFLAG_RDTUN, 308260763Savg &zfs_deadman_synctime_ms, 0, 309260763Savg "Stalled ZFS I/O expiration time in milliseconds"); 310168404Spjd 311168404Spjd/* 312260763Savg * Check time in milliseconds. This defines the frequency at which we check 313260763Savg * for hung I/O. 314247265Smm */ 315260763Savguint64_t zfs_deadman_checktime_ms = 5000ULL; 316260763SavgTUNABLE_QUAD("vfs.zfs.deadman_checktime_ms", &zfs_deadman_checktime_ms); 317260763SavgSYSCTL_UQUAD(_vfs_zfs, OID_AUTO, deadman_checktime_ms, CTLFLAG_RDTUN, 318260763Savg &zfs_deadman_checktime_ms, 0, 319260763Savg "Period of checks for stalled ZFS I/O in milliseconds"); 320247265Smm 321247265Smm/* 322247265Smm * Default value of -1 for zfs_deadman_enabled is resolved in 323247265Smm * zfs_deadman_init() 324247265Smm */ 325247265Smmint zfs_deadman_enabled = -1; 326247265SmmTUNABLE_INT("vfs.zfs.deadman_enabled", &zfs_deadman_enabled); 327247265SmmSYSCTL_INT(_vfs_zfs, OID_AUTO, deadman_enabled, CTLFLAG_RDTUN, 328247265Smm &zfs_deadman_enabled, 0, "Kernel panic on stalled ZFS I/O"); 329247265Smm 330260763Savg/* 331260763Savg * The worst case is single-sector max-parity RAID-Z blocks, in which 332260763Savg * case the space requirement is exactly (VDEV_RAIDZ_MAXPARITY + 1) 333260763Savg * times the size; so just assume that. Add to this the fact that 334260763Savg * we can have up to 3 DVAs per bp, and one more factor of 2 because 335260763Savg * the block may be dittoed with up to 3 DVAs by ddt_sync(). All together, 336260763Savg * the worst case is: 337260763Savg * (VDEV_RAIDZ_MAXPARITY + 1) * SPA_DVAS_PER_BP * 2 == 24 338260763Savg */ 339260763Savgint spa_asize_inflation = 24; 340262179SavgTUNABLE_INT("vfs.zfs.spa_asize_inflation", &spa_asize_inflation); 341262179SavgSYSCTL_INT(_vfs_zfs, OID_AUTO, spa_asize_inflation, CTLFLAG_RWTUN, 342262179Savg &spa_asize_inflation, 0, "Worst case inflation factor for single sector writes"); 343260763Savg 344247265Smm#ifndef illumos 345247265Smm#ifdef _KERNEL 346247265Smmstatic void 347247265Smmzfs_deadman_init() 348247265Smm{ 349247265Smm /* 350247265Smm * If we are not i386 or amd64 or in a virtual machine, 351247265Smm * disable ZFS deadman thread by default 352247265Smm */ 353247265Smm if (zfs_deadman_enabled == -1) { 354247265Smm#if defined(__amd64__) || defined(__i386__) 355247265Smm zfs_deadman_enabled = (vm_guest == VM_GUEST_NO) ? 1 : 0; 356247265Smm#else 357247265Smm zfs_deadman_enabled = 0; 358247265Smm#endif 359247265Smm } 360247265Smm} 361247265Smm#endif /* _KERNEL */ 362247265Smm#endif /* !illumos */ 363247265Smm 364247265Smm/* 365269006Sdelphij * Normally, we don't allow the last 3.2% (1/(2^spa_slop_shift)) of space in 366269006Sdelphij * the pool to be consumed. This ensures that we don't run the pool 367269006Sdelphij * completely out of space, due to unaccounted changes (e.g. to the MOS). 368269006Sdelphij * It also limits the worst-case time to allocate space. If we have 369269006Sdelphij * less than this amount of free space, most ZPL operations (e.g. write, 370269006Sdelphij * create) will return ENOSPC. 371269006Sdelphij * 372269006Sdelphij * Certain operations (e.g. file removal, most administrative actions) can 373269006Sdelphij * use half the slop space. They will only return ENOSPC if less than half 374269006Sdelphij * the slop space is free. Typically, once the pool has less than the slop 375269006Sdelphij * space free, the user will use these operations to free up space in the pool. 376269006Sdelphij * These are the operations that call dsl_pool_adjustedsize() with the netfree 377269006Sdelphij * argument set to TRUE. 378269006Sdelphij * 379269006Sdelphij * A very restricted set of operations are always permitted, regardless of 380269006Sdelphij * the amount of free space. These are the operations that call 381269006Sdelphij * dsl_sync_task(ZFS_SPACE_CHECK_NONE), e.g. "zfs destroy". If these 382269006Sdelphij * operations result in a net increase in the amount of space used, 383269006Sdelphij * it is possible to run the pool completely out of space, causing it to 384269006Sdelphij * be permanently read-only. 385269006Sdelphij * 386269006Sdelphij * See also the comments in zfs_space_check_t. 387269006Sdelphij */ 388269006Sdelphijint spa_slop_shift = 5; 389275490SdelphijSYSCTL_INT(_vfs_zfs, OID_AUTO, spa_slop_shift, CTLFLAG_RWTUN, 390275490Sdelphij &spa_slop_shift, 0, 391275490Sdelphij "Shift value of reserved space (1/(2^spa_slop_shift))."); 392269006Sdelphij 393269006Sdelphij/* 394168404Spjd * ========================================================================== 395185029Spjd * SPA config locking 396185029Spjd * ========================================================================== 397185029Spjd */ 398185029Spjdstatic void 399185029Spjdspa_config_lock_init(spa_t *spa) 400185029Spjd{ 401185029Spjd for (int i = 0; i < SCL_LOCKS; i++) { 402185029Spjd spa_config_lock_t *scl = &spa->spa_config_lock[i]; 403185029Spjd mutex_init(&scl->scl_lock, NULL, MUTEX_DEFAULT, NULL); 404185029Spjd cv_init(&scl->scl_cv, NULL, CV_DEFAULT, NULL); 405248571Smm refcount_create_untracked(&scl->scl_count); 406185029Spjd scl->scl_writer = NULL; 407185029Spjd scl->scl_write_wanted = 0; 408185029Spjd } 409185029Spjd} 410185029Spjd 411185029Spjdstatic void 412185029Spjdspa_config_lock_destroy(spa_t *spa) 413185029Spjd{ 414185029Spjd for (int i = 0; i < SCL_LOCKS; i++) { 415185029Spjd spa_config_lock_t *scl = &spa->spa_config_lock[i]; 416185029Spjd mutex_destroy(&scl->scl_lock); 417185029Spjd cv_destroy(&scl->scl_cv); 418185029Spjd refcount_destroy(&scl->scl_count); 419185029Spjd ASSERT(scl->scl_writer == NULL); 420185029Spjd ASSERT(scl->scl_write_wanted == 0); 421185029Spjd } 422185029Spjd} 423185029Spjd 424185029Spjdint 425185029Spjdspa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw) 426185029Spjd{ 427185029Spjd for (int i = 0; i < SCL_LOCKS; i++) { 428185029Spjd spa_config_lock_t *scl = &spa->spa_config_lock[i]; 429185029Spjd if (!(locks & (1 << i))) 430185029Spjd continue; 431185029Spjd mutex_enter(&scl->scl_lock); 432185029Spjd if (rw == RW_READER) { 433185029Spjd if (scl->scl_writer || scl->scl_write_wanted) { 434185029Spjd mutex_exit(&scl->scl_lock); 435185029Spjd spa_config_exit(spa, locks ^ (1 << i), tag); 436185029Spjd return (0); 437185029Spjd } 438185029Spjd } else { 439185029Spjd ASSERT(scl->scl_writer != curthread); 440185029Spjd if (!refcount_is_zero(&scl->scl_count)) { 441185029Spjd mutex_exit(&scl->scl_lock); 442185029Spjd spa_config_exit(spa, locks ^ (1 << i), tag); 443185029Spjd return (0); 444185029Spjd } 445185029Spjd scl->scl_writer = curthread; 446185029Spjd } 447185029Spjd (void) refcount_add(&scl->scl_count, tag); 448185029Spjd mutex_exit(&scl->scl_lock); 449185029Spjd } 450185029Spjd return (1); 451185029Spjd} 452185029Spjd 453185029Spjdvoid 454185029Spjdspa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw) 455185029Spjd{ 456219089Spjd int wlocks_held = 0; 457219089Spjd 458248571Smm ASSERT3U(SCL_LOCKS, <, sizeof (wlocks_held) * NBBY); 459248571Smm 460185029Spjd for (int i = 0; i < SCL_LOCKS; i++) { 461185029Spjd spa_config_lock_t *scl = &spa->spa_config_lock[i]; 462219089Spjd if (scl->scl_writer == curthread) 463219089Spjd wlocks_held |= (1 << i); 464185029Spjd if (!(locks & (1 << i))) 465185029Spjd continue; 466185029Spjd mutex_enter(&scl->scl_lock); 467185029Spjd if (rw == RW_READER) { 468185029Spjd while (scl->scl_writer || scl->scl_write_wanted) { 469185029Spjd cv_wait(&scl->scl_cv, &scl->scl_lock); 470185029Spjd } 471185029Spjd } else { 472185029Spjd ASSERT(scl->scl_writer != curthread); 473185029Spjd while (!refcount_is_zero(&scl->scl_count)) { 474185029Spjd scl->scl_write_wanted++; 475185029Spjd cv_wait(&scl->scl_cv, &scl->scl_lock); 476185029Spjd scl->scl_write_wanted--; 477185029Spjd } 478185029Spjd scl->scl_writer = curthread; 479185029Spjd } 480185029Spjd (void) refcount_add(&scl->scl_count, tag); 481185029Spjd mutex_exit(&scl->scl_lock); 482185029Spjd } 483219089Spjd ASSERT(wlocks_held <= locks); 484185029Spjd} 485185029Spjd 486185029Spjdvoid 487185029Spjdspa_config_exit(spa_t *spa, int locks, void *tag) 488185029Spjd{ 489185029Spjd for (int i = SCL_LOCKS - 1; i >= 0; i--) { 490185029Spjd spa_config_lock_t *scl = &spa->spa_config_lock[i]; 491185029Spjd if (!(locks & (1 << i))) 492185029Spjd continue; 493185029Spjd mutex_enter(&scl->scl_lock); 494185029Spjd ASSERT(!refcount_is_zero(&scl->scl_count)); 495185029Spjd if (refcount_remove(&scl->scl_count, tag) == 0) { 496185029Spjd ASSERT(scl->scl_writer == NULL || 497185029Spjd scl->scl_writer == curthread); 498185029Spjd scl->scl_writer = NULL; /* OK in either case */ 499185029Spjd cv_broadcast(&scl->scl_cv); 500185029Spjd } 501185029Spjd mutex_exit(&scl->scl_lock); 502185029Spjd } 503185029Spjd} 504185029Spjd 505185029Spjdint 506185029Spjdspa_config_held(spa_t *spa, int locks, krw_t rw) 507185029Spjd{ 508185029Spjd int locks_held = 0; 509185029Spjd 510185029Spjd for (int i = 0; i < SCL_LOCKS; i++) { 511185029Spjd spa_config_lock_t *scl = &spa->spa_config_lock[i]; 512185029Spjd if (!(locks & (1 << i))) 513185029Spjd continue; 514185029Spjd if ((rw == RW_READER && !refcount_is_zero(&scl->scl_count)) || 515185029Spjd (rw == RW_WRITER && scl->scl_writer == curthread)) 516185029Spjd locks_held |= 1 << i; 517185029Spjd } 518185029Spjd 519185029Spjd return (locks_held); 520185029Spjd} 521185029Spjd 522185029Spjd/* 523185029Spjd * ========================================================================== 524168404Spjd * SPA namespace functions 525168404Spjd * ========================================================================== 526168404Spjd */ 527168404Spjd 528168404Spjd/* 529168404Spjd * Lookup the named spa_t in the AVL tree. The spa_namespace_lock must be held. 530168404Spjd * Returns NULL if no matching spa_t is found. 531168404Spjd */ 532168404Spjdspa_t * 533168404Spjdspa_lookup(const char *name) 534168404Spjd{ 535185029Spjd static spa_t search; /* spa_t is large; don't allocate on stack */ 536185029Spjd spa_t *spa; 537168404Spjd avl_index_t where; 538185029Spjd char *cp; 539168404Spjd 540168404Spjd ASSERT(MUTEX_HELD(&spa_namespace_lock)); 541168404Spjd 542248571Smm (void) strlcpy(search.spa_name, name, sizeof (search.spa_name)); 543248571Smm 544185029Spjd /* 545185029Spjd * If it's a full dataset name, figure out the pool name and 546185029Spjd * just use that. 547185029Spjd */ 548263407Sdelphij cp = strpbrk(search.spa_name, "/@#"); 549248571Smm if (cp != NULL) 550185029Spjd *cp = '\0'; 551185029Spjd 552168404Spjd spa = avl_find(&spa_namespace_avl, &search, &where); 553168404Spjd 554168404Spjd return (spa); 555168404Spjd} 556168404Spjd 557168404Spjd/* 558247265Smm * Fires when spa_sync has not completed within zfs_deadman_synctime_ms. 559247265Smm * If the zfs_deadman_enabled flag is set then it inspects all vdev queues 560247265Smm * looking for potentially hung I/Os. 561247265Smm */ 562247265Smmvoid 563247265Smmspa_deadman(void *arg) 564247265Smm{ 565247265Smm spa_t *spa = arg; 566247265Smm 567262093Savg /* 568262093Savg * Disable the deadman timer if the pool is suspended. 569262093Savg */ 570262093Savg if (spa_suspended(spa)) { 571262093Savg#ifdef illumos 572262093Savg VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, CY_INFINITY)); 573262093Savg#else 574262093Savg /* Nothing. just don't schedule any future callouts. */ 575262093Savg#endif 576262093Savg return; 577262093Savg } 578262093Savg 579247265Smm zfs_dbgmsg("slow spa_sync: started %llu seconds ago, calls %llu", 580247265Smm (gethrtime() - spa->spa_sync_starttime) / NANOSEC, 581247265Smm ++spa->spa_deadman_calls); 582247265Smm if (zfs_deadman_enabled) 583247265Smm vdev_deadman(spa->spa_root_vdev); 584247265Smm} 585247265Smm 586247265Smm/* 587168404Spjd * Create an uninitialized spa_t with the given name. Requires 588168404Spjd * spa_namespace_lock. The caller must ensure that the spa_t doesn't already 589168404Spjd * exist by calling spa_lookup() first. 590168404Spjd */ 591168404Spjdspa_t * 592219089Spjdspa_add(const char *name, nvlist_t *config, const char *altroot) 593168404Spjd{ 594168404Spjd spa_t *spa; 595185029Spjd spa_config_dirent_t *dp; 596247265Smm#ifdef illumos 597247265Smm cyc_handler_t hdlr; 598247265Smm cyc_time_t when; 599247265Smm#endif 600168404Spjd 601168404Spjd ASSERT(MUTEX_HELD(&spa_namespace_lock)); 602168404Spjd 603168404Spjd spa = kmem_zalloc(sizeof (spa_t), KM_SLEEP); 604168404Spjd 605168404Spjd mutex_init(&spa->spa_async_lock, NULL, MUTEX_DEFAULT, NULL); 606219089Spjd mutex_init(&spa->spa_errlist_lock, NULL, MUTEX_DEFAULT, NULL); 607185029Spjd mutex_init(&spa->spa_errlog_lock, NULL, MUTEX_DEFAULT, NULL); 608288549Smav mutex_init(&spa->spa_evicting_os_lock, NULL, MUTEX_DEFAULT, NULL); 609185029Spjd mutex_init(&spa->spa_history_lock, NULL, MUTEX_DEFAULT, NULL); 610219089Spjd mutex_init(&spa->spa_proc_lock, NULL, MUTEX_DEFAULT, NULL); 611185029Spjd mutex_init(&spa->spa_props_lock, NULL, MUTEX_DEFAULT, NULL); 612290757Smav mutex_init(&spa->spa_cksum_tmpls_lock, NULL, MUTEX_DEFAULT, NULL); 613219089Spjd mutex_init(&spa->spa_scrub_lock, NULL, MUTEX_DEFAULT, NULL); 614219089Spjd mutex_init(&spa->spa_suspend_lock, NULL, MUTEX_DEFAULT, NULL); 615219089Spjd mutex_init(&spa->spa_vdev_top_lock, NULL, MUTEX_DEFAULT, NULL); 616168404Spjd 617185029Spjd cv_init(&spa->spa_async_cv, NULL, CV_DEFAULT, NULL); 618288549Smav cv_init(&spa->spa_evicting_os_cv, NULL, CV_DEFAULT, NULL); 619219089Spjd cv_init(&spa->spa_proc_cv, NULL, CV_DEFAULT, NULL); 620168404Spjd cv_init(&spa->spa_scrub_io_cv, NULL, CV_DEFAULT, NULL); 621185029Spjd cv_init(&spa->spa_suspend_cv, NULL, CV_DEFAULT, NULL); 622168404Spjd 623219089Spjd for (int t = 0; t < TXG_SIZE; t++) 624219089Spjd bplist_create(&spa->spa_free_bplist[t]); 625219089Spjd 626185029Spjd (void) strlcpy(spa->spa_name, name, sizeof (spa->spa_name)); 627185029Spjd spa->spa_state = POOL_STATE_UNINITIALIZED; 628185029Spjd spa->spa_freeze_txg = UINT64_MAX; 629185029Spjd spa->spa_final_txg = UINT64_MAX; 630219089Spjd spa->spa_load_max_txg = UINT64_MAX; 631219089Spjd spa->spa_proc = &p0; 632219089Spjd spa->spa_proc_state = SPA_PROC_NONE; 633185029Spjd 634247265Smm#ifdef illumos 635247265Smm hdlr.cyh_func = spa_deadman; 636247265Smm hdlr.cyh_arg = spa; 637247265Smm hdlr.cyh_level = CY_LOW_LEVEL; 638247265Smm#endif 639247265Smm 640260763Savg spa->spa_deadman_synctime = MSEC2NSEC(zfs_deadman_synctime_ms); 641247265Smm 642247265Smm#ifdef illumos 643247265Smm /* 644247265Smm * This determines how often we need to check for hung I/Os after 645247265Smm * the cyclic has already fired. Since checking for hung I/Os is 646247265Smm * an expensive operation we don't want to check too frequently. 647260763Savg * Instead wait for 5 seconds before checking again. 648247265Smm */ 649260763Savg when.cyt_interval = MSEC2NSEC(zfs_deadman_checktime_ms); 650247265Smm when.cyt_when = CY_INFINITY; 651247265Smm mutex_enter(&cpu_lock); 652247265Smm spa->spa_deadman_cycid = cyclic_add(&hdlr, &when); 653247265Smm mutex_exit(&cpu_lock); 654247265Smm#else /* !illumos */ 655247265Smm#ifdef _KERNEL 656247265Smm callout_init(&spa->spa_deadman_cycid, CALLOUT_MPSAFE); 657247265Smm#endif 658247265Smm#endif 659168404Spjd refcount_create(&spa->spa_refcount); 660185029Spjd spa_config_lock_init(spa); 661168404Spjd 662168404Spjd avl_add(&spa_namespace_avl, spa); 663168404Spjd 664168404Spjd /* 665168404Spjd * Set the alternate root, if there is one. 666168404Spjd */ 667168404Spjd if (altroot) { 668168404Spjd spa->spa_root = spa_strdup(altroot); 669168404Spjd spa_active_count++; 670168404Spjd } 671168404Spjd 672185029Spjd /* 673185029Spjd * Every pool starts with the default cachefile 674185029Spjd */ 675185029Spjd list_create(&spa->spa_config_list, sizeof (spa_config_dirent_t), 676185029Spjd offsetof(spa_config_dirent_t, scd_link)); 677185029Spjd 678185029Spjd dp = kmem_zalloc(sizeof (spa_config_dirent_t), KM_SLEEP); 679219089Spjd dp->scd_path = altroot ? NULL : spa_strdup(spa_config_path); 680185029Spjd list_insert_head(&spa->spa_config_list, dp); 681185029Spjd 682219089Spjd VERIFY(nvlist_alloc(&spa->spa_load_info, NV_UNIQUE_NAME, 683219089Spjd KM_SLEEP) == 0); 684219089Spjd 685236884Smm if (config != NULL) { 686236884Smm nvlist_t *features; 687236884Smm 688236884Smm if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_FEATURES_FOR_READ, 689236884Smm &features) == 0) { 690236884Smm VERIFY(nvlist_dup(features, &spa->spa_label_features, 691236884Smm 0) == 0); 692236884Smm } 693236884Smm 694219089Spjd VERIFY(nvlist_dup(config, &spa->spa_config, 0) == 0); 695236884Smm } 696219089Spjd 697236884Smm if (spa->spa_label_features == NULL) { 698236884Smm VERIFY(nvlist_alloc(&spa->spa_label_features, NV_UNIQUE_NAME, 699236884Smm KM_SLEEP) == 0); 700236884Smm } 701236884Smm 702248571Smm spa->spa_debug = ((zfs_flags & ZFS_DEBUG_SPA) != 0); 703248571Smm 704285001Savg spa->spa_min_ashift = INT_MAX; 705285001Savg spa->spa_max_ashift = 0; 706285001Savg 707263397Sdelphij /* 708263397Sdelphij * As a pool is being created, treat all features as disabled by 709263397Sdelphij * setting SPA_FEATURE_DISABLED for all entries in the feature 710263397Sdelphij * refcount cache. 711263397Sdelphij */ 712263397Sdelphij for (int i = 0; i < SPA_FEATURES; i++) { 713263397Sdelphij spa->spa_feat_refcount_cache[i] = SPA_FEATURE_DISABLED; 714263397Sdelphij } 715263397Sdelphij 716168404Spjd return (spa); 717168404Spjd} 718168404Spjd 719168404Spjd/* 720168404Spjd * Removes a spa_t from the namespace, freeing up any memory used. Requires 721168404Spjd * spa_namespace_lock. This is called only after the spa_t has been closed and 722168404Spjd * deactivated. 723168404Spjd */ 724168404Spjdvoid 725168404Spjdspa_remove(spa_t *spa) 726168404Spjd{ 727185029Spjd spa_config_dirent_t *dp; 728185029Spjd 729168404Spjd ASSERT(MUTEX_HELD(&spa_namespace_lock)); 730168404Spjd ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); 731288549Smav ASSERT3U(refcount_count(&spa->spa_refcount), ==, 0); 732168404Spjd 733219089Spjd nvlist_free(spa->spa_config_splitting); 734219089Spjd 735168404Spjd avl_remove(&spa_namespace_avl, spa); 736168404Spjd cv_broadcast(&spa_namespace_cv); 737168404Spjd 738168404Spjd if (spa->spa_root) { 739168404Spjd spa_strfree(spa->spa_root); 740168404Spjd spa_active_count--; 741168404Spjd } 742168404Spjd 743185029Spjd while ((dp = list_head(&spa->spa_config_list)) != NULL) { 744185029Spjd list_remove(&spa->spa_config_list, dp); 745185029Spjd if (dp->scd_path != NULL) 746185029Spjd spa_strfree(dp->scd_path); 747185029Spjd kmem_free(dp, sizeof (spa_config_dirent_t)); 748185029Spjd } 749168404Spjd 750185029Spjd list_destroy(&spa->spa_config_list); 751185029Spjd 752236884Smm nvlist_free(spa->spa_label_features); 753219089Spjd nvlist_free(spa->spa_load_info); 754168404Spjd spa_config_set(spa, NULL); 755168404Spjd 756247265Smm#ifdef illumos 757247265Smm mutex_enter(&cpu_lock); 758247265Smm if (spa->spa_deadman_cycid != CYCLIC_NONE) 759247265Smm cyclic_remove(spa->spa_deadman_cycid); 760247265Smm mutex_exit(&cpu_lock); 761247265Smm spa->spa_deadman_cycid = CYCLIC_NONE; 762247265Smm#else /* !illumos */ 763247265Smm#ifdef _KERNEL 764247265Smm callout_drain(&spa->spa_deadman_cycid); 765247265Smm#endif 766247265Smm#endif 767247265Smm 768168404Spjd refcount_destroy(&spa->spa_refcount); 769168404Spjd 770185029Spjd spa_config_lock_destroy(spa); 771185029Spjd 772219089Spjd for (int t = 0; t < TXG_SIZE; t++) 773219089Spjd bplist_destroy(&spa->spa_free_bplist[t]); 774219089Spjd 775290757Smav zio_checksum_templates_free(spa); 776290757Smav 777168404Spjd cv_destroy(&spa->spa_async_cv); 778288549Smav cv_destroy(&spa->spa_evicting_os_cv); 779219089Spjd cv_destroy(&spa->spa_proc_cv); 780168404Spjd cv_destroy(&spa->spa_scrub_io_cv); 781185029Spjd cv_destroy(&spa->spa_suspend_cv); 782168404Spjd 783185029Spjd mutex_destroy(&spa->spa_async_lock); 784219089Spjd mutex_destroy(&spa->spa_errlist_lock); 785185029Spjd mutex_destroy(&spa->spa_errlog_lock); 786288549Smav mutex_destroy(&spa->spa_evicting_os_lock); 787185029Spjd mutex_destroy(&spa->spa_history_lock); 788219089Spjd mutex_destroy(&spa->spa_proc_lock); 789185029Spjd mutex_destroy(&spa->spa_props_lock); 790290757Smav mutex_destroy(&spa->spa_cksum_tmpls_lock); 791219089Spjd mutex_destroy(&spa->spa_scrub_lock); 792185029Spjd mutex_destroy(&spa->spa_suspend_lock); 793219089Spjd mutex_destroy(&spa->spa_vdev_top_lock); 794168404Spjd 795168404Spjd kmem_free(spa, sizeof (spa_t)); 796168404Spjd} 797168404Spjd 798168404Spjd/* 799168404Spjd * Given a pool, return the next pool in the namespace, or NULL if there is 800168404Spjd * none. If 'prev' is NULL, return the first pool. 801168404Spjd */ 802168404Spjdspa_t * 803168404Spjdspa_next(spa_t *prev) 804168404Spjd{ 805168404Spjd ASSERT(MUTEX_HELD(&spa_namespace_lock)); 806168404Spjd 807168404Spjd if (prev) 808168404Spjd return (AVL_NEXT(&spa_namespace_avl, prev)); 809168404Spjd else 810168404Spjd return (avl_first(&spa_namespace_avl)); 811168404Spjd} 812168404Spjd 813168404Spjd/* 814168404Spjd * ========================================================================== 815168404Spjd * SPA refcount functions 816168404Spjd * ========================================================================== 817168404Spjd */ 818168404Spjd 819168404Spjd/* 820168404Spjd * Add a reference to the given spa_t. Must have at least one reference, or 821168404Spjd * have the namespace lock held. 822168404Spjd */ 823168404Spjdvoid 824168404Spjdspa_open_ref(spa_t *spa, void *tag) 825168404Spjd{ 826185029Spjd ASSERT(refcount_count(&spa->spa_refcount) >= spa->spa_minref || 827168404Spjd MUTEX_HELD(&spa_namespace_lock)); 828168404Spjd (void) refcount_add(&spa->spa_refcount, tag); 829168404Spjd} 830168404Spjd 831168404Spjd/* 832168404Spjd * Remove a reference to the given spa_t. Must have at least one reference, or 833168404Spjd * have the namespace lock held. 834168404Spjd */ 835168404Spjdvoid 836168404Spjdspa_close(spa_t *spa, void *tag) 837168404Spjd{ 838185029Spjd ASSERT(refcount_count(&spa->spa_refcount) > spa->spa_minref || 839168404Spjd MUTEX_HELD(&spa_namespace_lock)); 840168404Spjd (void) refcount_remove(&spa->spa_refcount, tag); 841168404Spjd} 842168404Spjd 843168404Spjd/* 844288549Smav * Remove a reference to the given spa_t held by a dsl dir that is 845288549Smav * being asynchronously released. Async releases occur from a taskq 846288549Smav * performing eviction of dsl datasets and dirs. The namespace lock 847288549Smav * isn't held and the hold by the object being evicted may contribute to 848288549Smav * spa_minref (e.g. dataset or directory released during pool export), 849288549Smav * so the asserts in spa_close() do not apply. 850288549Smav */ 851288549Smavvoid 852288549Smavspa_async_close(spa_t *spa, void *tag) 853288549Smav{ 854288549Smav (void) refcount_remove(&spa->spa_refcount, tag); 855288549Smav} 856288549Smav 857288549Smav/* 858168404Spjd * Check to see if the spa refcount is zero. Must be called with 859185029Spjd * spa_namespace_lock held. We really compare against spa_minref, which is the 860168404Spjd * number of references acquired when opening a pool 861168404Spjd */ 862168404Spjdboolean_t 863168404Spjdspa_refcount_zero(spa_t *spa) 864168404Spjd{ 865168404Spjd ASSERT(MUTEX_HELD(&spa_namespace_lock)); 866168404Spjd 867185029Spjd return (refcount_count(&spa->spa_refcount) == spa->spa_minref); 868168404Spjd} 869168404Spjd 870168404Spjd/* 871168404Spjd * ========================================================================== 872185029Spjd * SPA spare and l2cache tracking 873168404Spjd * ========================================================================== 874168404Spjd */ 875168404Spjd 876168404Spjd/* 877185029Spjd * Hot spares and cache devices are tracked using the same code below, 878185029Spjd * for 'auxiliary' devices. 879185029Spjd */ 880185029Spjd 881185029Spjdtypedef struct spa_aux { 882185029Spjd uint64_t aux_guid; 883185029Spjd uint64_t aux_pool; 884185029Spjd avl_node_t aux_avl; 885185029Spjd int aux_count; 886185029Spjd} spa_aux_t; 887185029Spjd 888185029Spjdstatic int 889185029Spjdspa_aux_compare(const void *a, const void *b) 890185029Spjd{ 891185029Spjd const spa_aux_t *sa = a; 892185029Spjd const spa_aux_t *sb = b; 893185029Spjd 894185029Spjd if (sa->aux_guid < sb->aux_guid) 895185029Spjd return (-1); 896185029Spjd else if (sa->aux_guid > sb->aux_guid) 897185029Spjd return (1); 898185029Spjd else 899185029Spjd return (0); 900185029Spjd} 901185029Spjd 902185029Spjdvoid 903185029Spjdspa_aux_add(vdev_t *vd, avl_tree_t *avl) 904185029Spjd{ 905185029Spjd avl_index_t where; 906185029Spjd spa_aux_t search; 907185029Spjd spa_aux_t *aux; 908185029Spjd 909185029Spjd search.aux_guid = vd->vdev_guid; 910185029Spjd if ((aux = avl_find(avl, &search, &where)) != NULL) { 911185029Spjd aux->aux_count++; 912185029Spjd } else { 913185029Spjd aux = kmem_zalloc(sizeof (spa_aux_t), KM_SLEEP); 914185029Spjd aux->aux_guid = vd->vdev_guid; 915185029Spjd aux->aux_count = 1; 916185029Spjd avl_insert(avl, aux, where); 917185029Spjd } 918185029Spjd} 919185029Spjd 920185029Spjdvoid 921185029Spjdspa_aux_remove(vdev_t *vd, avl_tree_t *avl) 922185029Spjd{ 923185029Spjd spa_aux_t search; 924185029Spjd spa_aux_t *aux; 925185029Spjd avl_index_t where; 926185029Spjd 927185029Spjd search.aux_guid = vd->vdev_guid; 928185029Spjd aux = avl_find(avl, &search, &where); 929185029Spjd 930185029Spjd ASSERT(aux != NULL); 931185029Spjd 932185029Spjd if (--aux->aux_count == 0) { 933185029Spjd avl_remove(avl, aux); 934185029Spjd kmem_free(aux, sizeof (spa_aux_t)); 935185029Spjd } else if (aux->aux_pool == spa_guid(vd->vdev_spa)) { 936185029Spjd aux->aux_pool = 0ULL; 937185029Spjd } 938185029Spjd} 939185029Spjd 940185029Spjdboolean_t 941185029Spjdspa_aux_exists(uint64_t guid, uint64_t *pool, int *refcnt, avl_tree_t *avl) 942185029Spjd{ 943185029Spjd spa_aux_t search, *found; 944185029Spjd 945185029Spjd search.aux_guid = guid; 946185029Spjd found = avl_find(avl, &search, NULL); 947185029Spjd 948185029Spjd if (pool) { 949185029Spjd if (found) 950185029Spjd *pool = found->aux_pool; 951185029Spjd else 952185029Spjd *pool = 0ULL; 953185029Spjd } 954185029Spjd 955185029Spjd if (refcnt) { 956185029Spjd if (found) 957185029Spjd *refcnt = found->aux_count; 958185029Spjd else 959185029Spjd *refcnt = 0; 960185029Spjd } 961185029Spjd 962185029Spjd return (found != NULL); 963185029Spjd} 964185029Spjd 965185029Spjdvoid 966185029Spjdspa_aux_activate(vdev_t *vd, avl_tree_t *avl) 967185029Spjd{ 968185029Spjd spa_aux_t search, *found; 969185029Spjd avl_index_t where; 970185029Spjd 971185029Spjd search.aux_guid = vd->vdev_guid; 972185029Spjd found = avl_find(avl, &search, &where); 973185029Spjd ASSERT(found != NULL); 974185029Spjd ASSERT(found->aux_pool == 0ULL); 975185029Spjd 976185029Spjd found->aux_pool = spa_guid(vd->vdev_spa); 977185029Spjd} 978185029Spjd 979185029Spjd/* 980168404Spjd * Spares are tracked globally due to the following constraints: 981168404Spjd * 982168404Spjd * - A spare may be part of multiple pools. 983168404Spjd * - A spare may be added to a pool even if it's actively in use within 984168404Spjd * another pool. 985168404Spjd * - A spare in use in any pool can only be the source of a replacement if 986168404Spjd * the target is a spare in the same pool. 987168404Spjd * 988168404Spjd * We keep track of all spares on the system through the use of a reference 989168404Spjd * counted AVL tree. When a vdev is added as a spare, or used as a replacement 990168404Spjd * spare, then we bump the reference count in the AVL tree. In addition, we set 991168404Spjd * the 'vdev_isspare' member to indicate that the device is a spare (active or 992168404Spjd * inactive). When a spare is made active (used to replace a device in the 993168404Spjd * pool), we also keep track of which pool its been made a part of. 994168404Spjd * 995168404Spjd * The 'spa_spare_lock' protects the AVL tree. These functions are normally 996168404Spjd * called under the spa_namespace lock as part of vdev reconfiguration. The 997168404Spjd * separate spare lock exists for the status query path, which does not need to 998168404Spjd * be completely consistent with respect to other vdev configuration changes. 999168404Spjd */ 1000168404Spjd 1001168404Spjdstatic int 1002168404Spjdspa_spare_compare(const void *a, const void *b) 1003168404Spjd{ 1004185029Spjd return (spa_aux_compare(a, b)); 1005168404Spjd} 1006168404Spjd 1007168404Spjdvoid 1008168404Spjdspa_spare_add(vdev_t *vd) 1009168404Spjd{ 1010168404Spjd mutex_enter(&spa_spare_lock); 1011168404Spjd ASSERT(!vd->vdev_isspare); 1012185029Spjd spa_aux_add(vd, &spa_spare_avl); 1013168404Spjd vd->vdev_isspare = B_TRUE; 1014168404Spjd mutex_exit(&spa_spare_lock); 1015168404Spjd} 1016168404Spjd 1017168404Spjdvoid 1018168404Spjdspa_spare_remove(vdev_t *vd) 1019168404Spjd{ 1020168404Spjd mutex_enter(&spa_spare_lock); 1021168404Spjd ASSERT(vd->vdev_isspare); 1022185029Spjd spa_aux_remove(vd, &spa_spare_avl); 1023168404Spjd vd->vdev_isspare = B_FALSE; 1024168404Spjd mutex_exit(&spa_spare_lock); 1025168404Spjd} 1026168404Spjd 1027168404Spjdboolean_t 1028185029Spjdspa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt) 1029168404Spjd{ 1030185029Spjd boolean_t found; 1031168404Spjd 1032168404Spjd mutex_enter(&spa_spare_lock); 1033185029Spjd found = spa_aux_exists(guid, pool, refcnt, &spa_spare_avl); 1034168404Spjd mutex_exit(&spa_spare_lock); 1035168404Spjd 1036185029Spjd return (found); 1037168404Spjd} 1038168404Spjd 1039168404Spjdvoid 1040168404Spjdspa_spare_activate(vdev_t *vd) 1041168404Spjd{ 1042168404Spjd mutex_enter(&spa_spare_lock); 1043168404Spjd ASSERT(vd->vdev_isspare); 1044185029Spjd spa_aux_activate(vd, &spa_spare_avl); 1045168404Spjd mutex_exit(&spa_spare_lock); 1046168404Spjd} 1047168404Spjd 1048168404Spjd/* 1049185029Spjd * Level 2 ARC devices are tracked globally for the same reasons as spares. 1050185029Spjd * Cache devices currently only support one pool per cache device, and so 1051185029Spjd * for these devices the aux reference count is currently unused beyond 1. 1052168404Spjd */ 1053168404Spjd 1054185029Spjdstatic int 1055185029Spjdspa_l2cache_compare(const void *a, const void *b) 1056185029Spjd{ 1057185029Spjd return (spa_aux_compare(a, b)); 1058185029Spjd} 1059185029Spjd 1060168404Spjdvoid 1061185029Spjdspa_l2cache_add(vdev_t *vd) 1062168404Spjd{ 1063185029Spjd mutex_enter(&spa_l2cache_lock); 1064185029Spjd ASSERT(!vd->vdev_isl2cache); 1065185029Spjd spa_aux_add(vd, &spa_l2cache_avl); 1066185029Spjd vd->vdev_isl2cache = B_TRUE; 1067185029Spjd mutex_exit(&spa_l2cache_lock); 1068185029Spjd} 1069168404Spjd 1070185029Spjdvoid 1071185029Spjdspa_l2cache_remove(vdev_t *vd) 1072185029Spjd{ 1073185029Spjd mutex_enter(&spa_l2cache_lock); 1074185029Spjd ASSERT(vd->vdev_isl2cache); 1075185029Spjd spa_aux_remove(vd, &spa_l2cache_avl); 1076185029Spjd vd->vdev_isl2cache = B_FALSE; 1077185029Spjd mutex_exit(&spa_l2cache_lock); 1078185029Spjd} 1079168404Spjd 1080185029Spjdboolean_t 1081185029Spjdspa_l2cache_exists(uint64_t guid, uint64_t *pool) 1082185029Spjd{ 1083185029Spjd boolean_t found; 1084168404Spjd 1085185029Spjd mutex_enter(&spa_l2cache_lock); 1086185029Spjd found = spa_aux_exists(guid, pool, NULL, &spa_l2cache_avl); 1087185029Spjd mutex_exit(&spa_l2cache_lock); 1088168404Spjd 1089185029Spjd return (found); 1090168404Spjd} 1091168404Spjd 1092168404Spjdvoid 1093185029Spjdspa_l2cache_activate(vdev_t *vd) 1094168404Spjd{ 1095185029Spjd mutex_enter(&spa_l2cache_lock); 1096185029Spjd ASSERT(vd->vdev_isl2cache); 1097185029Spjd spa_aux_activate(vd, &spa_l2cache_avl); 1098185029Spjd mutex_exit(&spa_l2cache_lock); 1099168404Spjd} 1100168404Spjd 1101168404Spjd/* 1102168404Spjd * ========================================================================== 1103168404Spjd * SPA vdev locking 1104168404Spjd * ========================================================================== 1105168404Spjd */ 1106168404Spjd 1107168404Spjd/* 1108168404Spjd * Lock the given spa_t for the purpose of adding or removing a vdev. 1109168404Spjd * Grabs the global spa_namespace_lock plus the spa config lock for writing. 1110168404Spjd * It returns the next transaction group for the spa_t. 1111168404Spjd */ 1112168404Spjduint64_t 1113168404Spjdspa_vdev_enter(spa_t *spa) 1114168404Spjd{ 1115219089Spjd mutex_enter(&spa->spa_vdev_top_lock); 1116168404Spjd mutex_enter(&spa_namespace_lock); 1117219089Spjd return (spa_vdev_config_enter(spa)); 1118219089Spjd} 1119168404Spjd 1120219089Spjd/* 1121219089Spjd * Internal implementation for spa_vdev_enter(). Used when a vdev 1122219089Spjd * operation requires multiple syncs (i.e. removing a device) while 1123219089Spjd * keeping the spa_namespace_lock held. 1124219089Spjd */ 1125219089Spjduint64_t 1126219089Spjdspa_vdev_config_enter(spa_t *spa) 1127219089Spjd{ 1128219089Spjd ASSERT(MUTEX_HELD(&spa_namespace_lock)); 1129219089Spjd 1130185029Spjd spa_config_enter(spa, SCL_ALL, spa, RW_WRITER); 1131168404Spjd 1132168404Spjd return (spa_last_synced_txg(spa) + 1); 1133168404Spjd} 1134168404Spjd 1135168404Spjd/* 1136219089Spjd * Used in combination with spa_vdev_config_enter() to allow the syncing 1137219089Spjd * of multiple transactions without releasing the spa_namespace_lock. 1138168404Spjd */ 1139219089Spjdvoid 1140219089Spjdspa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error, char *tag) 1141168404Spjd{ 1142219089Spjd ASSERT(MUTEX_HELD(&spa_namespace_lock)); 1143219089Spjd 1144168404Spjd int config_changed = B_FALSE; 1145168404Spjd 1146168404Spjd ASSERT(txg > spa_last_synced_txg(spa)); 1147168404Spjd 1148185029Spjd spa->spa_pending_vdev = NULL; 1149185029Spjd 1150168404Spjd /* 1151168404Spjd * Reassess the DTLs. 1152168404Spjd */ 1153168404Spjd vdev_dtl_reassess(spa->spa_root_vdev, 0, 0, B_FALSE); 1154168404Spjd 1155185029Spjd if (error == 0 && !list_is_empty(&spa->spa_config_dirty_list)) { 1156168404Spjd config_changed = B_TRUE; 1157219089Spjd spa->spa_config_generation++; 1158168404Spjd } 1159168404Spjd 1160219089Spjd /* 1161219089Spjd * Verify the metaslab classes. 1162219089Spjd */ 1163219089Spjd ASSERT(metaslab_class_validate(spa_normal_class(spa)) == 0); 1164219089Spjd ASSERT(metaslab_class_validate(spa_log_class(spa)) == 0); 1165219089Spjd 1166185029Spjd spa_config_exit(spa, SCL_ALL, spa); 1167168404Spjd 1168168404Spjd /* 1169219089Spjd * Panic the system if the specified tag requires it. This 1170219089Spjd * is useful for ensuring that configurations are updated 1171219089Spjd * transactionally. 1172219089Spjd */ 1173219089Spjd if (zio_injection_enabled) 1174219089Spjd zio_handle_panic_injection(spa, tag, 0); 1175219089Spjd 1176219089Spjd /* 1177168404Spjd * Note: this txg_wait_synced() is important because it ensures 1178168404Spjd * that there won't be more than one config change per txg. 1179168404Spjd * This allows us to use the txg as the generation number. 1180168404Spjd */ 1181168404Spjd if (error == 0) 1182168404Spjd txg_wait_synced(spa->spa_dsl_pool, txg); 1183168404Spjd 1184168404Spjd if (vd != NULL) { 1185262093Savg ASSERT(!vd->vdev_detached || vd->vdev_dtl_sm == NULL); 1186209962Smm spa_config_enter(spa, SCL_ALL, spa, RW_WRITER); 1187168404Spjd vdev_free(vd); 1188209962Smm spa_config_exit(spa, SCL_ALL, spa); 1189168404Spjd } 1190168404Spjd 1191168404Spjd /* 1192168404Spjd * If the config changed, update the config cache. 1193168404Spjd */ 1194168404Spjd if (config_changed) 1195185029Spjd spa_config_sync(spa, B_FALSE, B_TRUE); 1196219089Spjd} 1197168404Spjd 1198219089Spjd/* 1199219089Spjd * Unlock the spa_t after adding or removing a vdev. Besides undoing the 1200219089Spjd * locking of spa_vdev_enter(), we also want make sure the transactions have 1201219089Spjd * synced to disk, and then update the global configuration cache with the new 1202219089Spjd * information. 1203219089Spjd */ 1204219089Spjdint 1205219089Spjdspa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error) 1206219089Spjd{ 1207219089Spjd spa_vdev_config_exit(spa, vd, txg, error, FTAG); 1208168404Spjd mutex_exit(&spa_namespace_lock); 1209219089Spjd mutex_exit(&spa->spa_vdev_top_lock); 1210168404Spjd 1211168404Spjd return (error); 1212168404Spjd} 1213168404Spjd 1214168404Spjd/* 1215185029Spjd * Lock the given spa_t for the purpose of changing vdev state. 1216185029Spjd */ 1217185029Spjdvoid 1218219089Spjdspa_vdev_state_enter(spa_t *spa, int oplocks) 1219185029Spjd{ 1220219089Spjd int locks = SCL_STATE_ALL | oplocks; 1221219089Spjd 1222219089Spjd /* 1223219089Spjd * Root pools may need to read of the underlying devfs filesystem 1224219089Spjd * when opening up a vdev. Unfortunately if we're holding the 1225219089Spjd * SCL_ZIO lock it will result in a deadlock when we try to issue 1226219089Spjd * the read from the root filesystem. Instead we "prefetch" 1227219089Spjd * the associated vnodes that we need prior to opening the 1228219089Spjd * underlying devices and cache them so that we can prevent 1229219089Spjd * any I/O when we are doing the actual open. 1230219089Spjd */ 1231219089Spjd if (spa_is_root(spa)) { 1232219089Spjd int low = locks & ~(SCL_ZIO - 1); 1233219089Spjd int high = locks & ~low; 1234219089Spjd 1235219089Spjd spa_config_enter(spa, high, spa, RW_WRITER); 1236219089Spjd vdev_hold(spa->spa_root_vdev); 1237219089Spjd spa_config_enter(spa, low, spa, RW_WRITER); 1238219089Spjd } else { 1239219089Spjd spa_config_enter(spa, locks, spa, RW_WRITER); 1240219089Spjd } 1241219089Spjd spa->spa_vdev_locks = locks; 1242185029Spjd} 1243185029Spjd 1244185029Spjdint 1245185029Spjdspa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error) 1246185029Spjd{ 1247219089Spjd boolean_t config_changed = B_FALSE; 1248219089Spjd 1249219089Spjd if (vd != NULL || error == 0) 1250219089Spjd vdev_dtl_reassess(vd ? vd->vdev_top : spa->spa_root_vdev, 1251219089Spjd 0, 0, B_FALSE); 1252219089Spjd 1253219089Spjd if (vd != NULL) { 1254185029Spjd vdev_state_dirty(vd->vdev_top); 1255219089Spjd config_changed = B_TRUE; 1256219089Spjd spa->spa_config_generation++; 1257219089Spjd } 1258185029Spjd 1259219089Spjd if (spa_is_root(spa)) 1260219089Spjd vdev_rele(spa->spa_root_vdev); 1261185029Spjd 1262219089Spjd ASSERT3U(spa->spa_vdev_locks, >=, SCL_STATE_ALL); 1263219089Spjd spa_config_exit(spa, spa->spa_vdev_locks, spa); 1264219089Spjd 1265209962Smm /* 1266209962Smm * If anything changed, wait for it to sync. This ensures that, 1267209962Smm * from the system administrator's perspective, zpool(1M) commands 1268209962Smm * are synchronous. This is important for things like zpool offline: 1269209962Smm * when the command completes, you expect no further I/O from ZFS. 1270209962Smm */ 1271209962Smm if (vd != NULL) 1272209962Smm txg_wait_synced(spa->spa_dsl_pool, 0); 1273209962Smm 1274219089Spjd /* 1275219089Spjd * If the config changed, update the config cache. 1276219089Spjd */ 1277219089Spjd if (config_changed) { 1278219089Spjd mutex_enter(&spa_namespace_lock); 1279219089Spjd spa_config_sync(spa, B_FALSE, B_TRUE); 1280219089Spjd mutex_exit(&spa_namespace_lock); 1281219089Spjd } 1282219089Spjd 1283185029Spjd return (error); 1284185029Spjd} 1285185029Spjd 1286185029Spjd/* 1287168404Spjd * ========================================================================== 1288168404Spjd * Miscellaneous functions 1289168404Spjd * ========================================================================== 1290168404Spjd */ 1291168404Spjd 1292236884Smmvoid 1293263397Sdelphijspa_activate_mos_feature(spa_t *spa, const char *feature, dmu_tx_t *tx) 1294236884Smm{ 1295263390Sdelphij if (!nvlist_exists(spa->spa_label_features, feature)) { 1296263390Sdelphij fnvlist_add_boolean(spa->spa_label_features, feature); 1297263397Sdelphij /* 1298263397Sdelphij * When we are creating the pool (tx_txg==TXG_INITIAL), we can't 1299263397Sdelphij * dirty the vdev config because lock SCL_CONFIG is not held. 1300263397Sdelphij * Thankfully, in this case we don't need to dirty the config 1301263397Sdelphij * because it will be written out anyway when we finish 1302263397Sdelphij * creating the pool. 1303263397Sdelphij */ 1304263397Sdelphij if (tx->tx_txg != TXG_INITIAL) 1305263397Sdelphij vdev_config_dirty(spa->spa_root_vdev); 1306263390Sdelphij } 1307236884Smm} 1308236884Smm 1309236884Smmvoid 1310236884Smmspa_deactivate_mos_feature(spa_t *spa, const char *feature) 1311236884Smm{ 1312263390Sdelphij if (nvlist_remove_all(spa->spa_label_features, feature) == 0) 1313263390Sdelphij vdev_config_dirty(spa->spa_root_vdev); 1314236884Smm} 1315236884Smm 1316168404Spjd/* 1317168404Spjd * Rename a spa_t. 1318168404Spjd */ 1319168404Spjdint 1320168404Spjdspa_rename(const char *name, const char *newname) 1321168404Spjd{ 1322168404Spjd spa_t *spa; 1323168404Spjd int err; 1324168404Spjd 1325168404Spjd /* 1326168404Spjd * Lookup the spa_t and grab the config lock for writing. We need to 1327168404Spjd * actually open the pool so that we can sync out the necessary labels. 1328168404Spjd * It's OK to call spa_open() with the namespace lock held because we 1329168404Spjd * allow recursive calls for other reasons. 1330168404Spjd */ 1331168404Spjd mutex_enter(&spa_namespace_lock); 1332168404Spjd if ((err = spa_open(name, &spa, FTAG)) != 0) { 1333168404Spjd mutex_exit(&spa_namespace_lock); 1334168404Spjd return (err); 1335168404Spjd } 1336168404Spjd 1337185029Spjd spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1338168404Spjd 1339168404Spjd avl_remove(&spa_namespace_avl, spa); 1340185029Spjd (void) strlcpy(spa->spa_name, newname, sizeof (spa->spa_name)); 1341168404Spjd avl_add(&spa_namespace_avl, spa); 1342168404Spjd 1343168404Spjd /* 1344168404Spjd * Sync all labels to disk with the new names by marking the root vdev 1345168404Spjd * dirty and waiting for it to sync. It will pick up the new pool name 1346168404Spjd * during the sync. 1347168404Spjd */ 1348168404Spjd vdev_config_dirty(spa->spa_root_vdev); 1349168404Spjd 1350185029Spjd spa_config_exit(spa, SCL_ALL, FTAG); 1351168404Spjd 1352168404Spjd txg_wait_synced(spa->spa_dsl_pool, 0); 1353168404Spjd 1354168404Spjd /* 1355168404Spjd * Sync the updated config cache. 1356168404Spjd */ 1357185029Spjd spa_config_sync(spa, B_FALSE, B_TRUE); 1358168404Spjd 1359168404Spjd spa_close(spa, FTAG); 1360168404Spjd 1361168404Spjd mutex_exit(&spa_namespace_lock); 1362168404Spjd 1363168404Spjd return (0); 1364168404Spjd} 1365168404Spjd 1366168404Spjd/* 1367219089Spjd * Return the spa_t associated with given pool_guid, if it exists. If 1368219089Spjd * device_guid is non-zero, determine whether the pool exists *and* contains 1369219089Spjd * a device with the specified device_guid. 1370168404Spjd */ 1371219089Spjdspa_t * 1372219089Spjdspa_by_guid(uint64_t pool_guid, uint64_t device_guid) 1373168404Spjd{ 1374168404Spjd spa_t *spa; 1375168404Spjd avl_tree_t *t = &spa_namespace_avl; 1376168404Spjd 1377168404Spjd ASSERT(MUTEX_HELD(&spa_namespace_lock)); 1378168404Spjd 1379168404Spjd for (spa = avl_first(t); spa != NULL; spa = AVL_NEXT(t, spa)) { 1380168404Spjd if (spa->spa_state == POOL_STATE_UNINITIALIZED) 1381168404Spjd continue; 1382168404Spjd if (spa->spa_root_vdev == NULL) 1383168404Spjd continue; 1384168404Spjd if (spa_guid(spa) == pool_guid) { 1385168404Spjd if (device_guid == 0) 1386168404Spjd break; 1387168404Spjd 1388168404Spjd if (vdev_lookup_by_guid(spa->spa_root_vdev, 1389168404Spjd device_guid) != NULL) 1390168404Spjd break; 1391168404Spjd 1392168404Spjd /* 1393185029Spjd * Check any devices we may be in the process of adding. 1394168404Spjd */ 1395168404Spjd if (spa->spa_pending_vdev) { 1396168404Spjd if (vdev_lookup_by_guid(spa->spa_pending_vdev, 1397168404Spjd device_guid) != NULL) 1398168404Spjd break; 1399168404Spjd } 1400168404Spjd } 1401168404Spjd } 1402168404Spjd 1403219089Spjd return (spa); 1404168404Spjd} 1405168404Spjd 1406219089Spjd/* 1407219089Spjd * Determine whether a pool with the given pool_guid exists. 1408219089Spjd */ 1409219089Spjdboolean_t 1410219089Spjdspa_guid_exists(uint64_t pool_guid, uint64_t device_guid) 1411219089Spjd{ 1412219089Spjd return (spa_by_guid(pool_guid, device_guid) != NULL); 1413219089Spjd} 1414219089Spjd 1415168404Spjdchar * 1416168404Spjdspa_strdup(const char *s) 1417168404Spjd{ 1418168404Spjd size_t len; 1419168404Spjd char *new; 1420168404Spjd 1421168404Spjd len = strlen(s); 1422168404Spjd new = kmem_alloc(len + 1, KM_SLEEP); 1423168404Spjd bcopy(s, new, len); 1424168404Spjd new[len] = '\0'; 1425168404Spjd 1426168404Spjd return (new); 1427168404Spjd} 1428168404Spjd 1429168404Spjdvoid 1430168404Spjdspa_strfree(char *s) 1431168404Spjd{ 1432168404Spjd kmem_free(s, strlen(s) + 1); 1433168404Spjd} 1434168404Spjd 1435168404Spjduint64_t 1436168404Spjdspa_get_random(uint64_t range) 1437168404Spjd{ 1438168404Spjd uint64_t r; 1439168404Spjd 1440168404Spjd ASSERT(range != 0); 1441168404Spjd 1442168404Spjd (void) random_get_pseudo_bytes((void *)&r, sizeof (uint64_t)); 1443168404Spjd 1444168404Spjd return (r % range); 1445168404Spjd} 1446168404Spjd 1447219089Spjduint64_t 1448219089Spjdspa_generate_guid(spa_t *spa) 1449168404Spjd{ 1450219089Spjd uint64_t guid = spa_get_random(-1ULL); 1451168404Spjd 1452219089Spjd if (spa != NULL) { 1453219089Spjd while (guid == 0 || spa_guid_exists(spa_guid(spa), guid)) 1454219089Spjd guid = spa_get_random(-1ULL); 1455219089Spjd } else { 1456219089Spjd while (guid == 0 || spa_guid_exists(guid, 0)) 1457219089Spjd guid = spa_get_random(-1ULL); 1458168404Spjd } 1459168404Spjd 1460219089Spjd return (guid); 1461219089Spjd} 1462168404Spjd 1463219089Spjdvoid 1464263397Sdelphijsnprintf_blkptr(char *buf, size_t buflen, const blkptr_t *bp) 1465219089Spjd{ 1466236884Smm char type[256]; 1467219089Spjd char *checksum = NULL; 1468219089Spjd char *compress = NULL; 1469168404Spjd 1470219089Spjd if (bp != NULL) { 1471236884Smm if (BP_GET_TYPE(bp) & DMU_OT_NEWTYPE) { 1472236884Smm dmu_object_byteswap_t bswap = 1473236884Smm DMU_OT_BYTESWAP(BP_GET_TYPE(bp)); 1474236884Smm (void) snprintf(type, sizeof (type), "bswap %s %s", 1475236884Smm DMU_OT_IS_METADATA(BP_GET_TYPE(bp)) ? 1476236884Smm "metadata" : "data", 1477236884Smm dmu_ot_byteswap[bswap].ob_name); 1478236884Smm } else { 1479236884Smm (void) strlcpy(type, dmu_ot[BP_GET_TYPE(bp)].ot_name, 1480236884Smm sizeof (type)); 1481236884Smm } 1482268649Sdelphij if (!BP_IS_EMBEDDED(bp)) { 1483268649Sdelphij checksum = 1484268649Sdelphij zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_name; 1485268649Sdelphij } 1486219089Spjd compress = zio_compress_table[BP_GET_COMPRESS(bp)].ci_name; 1487168404Spjd } 1488168404Spjd 1489263397Sdelphij SNPRINTF_BLKPTR(snprintf, ' ', buf, buflen, bp, type, checksum, 1490263397Sdelphij compress); 1491168404Spjd} 1492168404Spjd 1493168404Spjdvoid 1494168404Spjdspa_freeze(spa_t *spa) 1495168404Spjd{ 1496168404Spjd uint64_t freeze_txg = 0; 1497168404Spjd 1498185029Spjd spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1499168404Spjd if (spa->spa_freeze_txg == UINT64_MAX) { 1500168404Spjd freeze_txg = spa_last_synced_txg(spa) + TXG_SIZE; 1501168404Spjd spa->spa_freeze_txg = freeze_txg; 1502168404Spjd } 1503185029Spjd spa_config_exit(spa, SCL_ALL, FTAG); 1504168404Spjd if (freeze_txg != 0) 1505168404Spjd txg_wait_synced(spa_get_dsl(spa), freeze_txg); 1506168404Spjd} 1507168404Spjd 1508168404Spjdvoid 1509168404Spjdzfs_panic_recover(const char *fmt, ...) 1510168404Spjd{ 1511168404Spjd va_list adx; 1512168404Spjd 1513168404Spjd va_start(adx, fmt); 1514168404Spjd vcmn_err(zfs_recover ? CE_WARN : CE_PANIC, fmt, adx); 1515168404Spjd va_end(adx); 1516168404Spjd} 1517168404Spjd 1518168404Spjd/* 1519209962Smm * This is a stripped-down version of strtoull, suitable only for converting 1520251631Sdelphij * lowercase hexadecimal numbers that don't overflow. 1521209962Smm */ 1522209962Smmuint64_t 1523209962Smmzfs_strtonum(const char *str, char **nptr) 1524209962Smm{ 1525209962Smm uint64_t val = 0; 1526209962Smm char c; 1527209962Smm int digit; 1528209962Smm 1529209962Smm while ((c = *str) != '\0') { 1530209962Smm if (c >= '0' && c <= '9') 1531209962Smm digit = c - '0'; 1532209962Smm else if (c >= 'a' && c <= 'f') 1533209962Smm digit = 10 + c - 'a'; 1534209962Smm else 1535209962Smm break; 1536209962Smm 1537209962Smm val *= 16; 1538209962Smm val += digit; 1539209962Smm 1540209962Smm str++; 1541209962Smm } 1542209962Smm 1543209962Smm if (nptr) 1544209962Smm *nptr = (char *)str; 1545209962Smm 1546209962Smm return (val); 1547209962Smm} 1548209962Smm 1549209962Smm/* 1550168404Spjd * ========================================================================== 1551168404Spjd * Accessor functions 1552168404Spjd * ========================================================================== 1553168404Spjd */ 1554168404Spjd 1555185029Spjdboolean_t 1556208047Smmspa_shutting_down(spa_t *spa) 1557168404Spjd{ 1558208047Smm return (spa->spa_async_suspended); 1559168404Spjd} 1560168404Spjd 1561168404Spjddsl_pool_t * 1562168404Spjdspa_get_dsl(spa_t *spa) 1563168404Spjd{ 1564168404Spjd return (spa->spa_dsl_pool); 1565168404Spjd} 1566168404Spjd 1567236884Smmboolean_t 1568236884Smmspa_is_initializing(spa_t *spa) 1569236884Smm{ 1570236884Smm return (spa->spa_is_initializing); 1571236884Smm} 1572236884Smm 1573168404Spjdblkptr_t * 1574168404Spjdspa_get_rootblkptr(spa_t *spa) 1575168404Spjd{ 1576168404Spjd return (&spa->spa_ubsync.ub_rootbp); 1577168404Spjd} 1578168404Spjd 1579168404Spjdvoid 1580168404Spjdspa_set_rootblkptr(spa_t *spa, const blkptr_t *bp) 1581168404Spjd{ 1582168404Spjd spa->spa_uberblock.ub_rootbp = *bp; 1583168404Spjd} 1584168404Spjd 1585168404Spjdvoid 1586168404Spjdspa_altroot(spa_t *spa, char *buf, size_t buflen) 1587168404Spjd{ 1588168404Spjd if (spa->spa_root == NULL) 1589168404Spjd buf[0] = '\0'; 1590168404Spjd else 1591168404Spjd (void) strncpy(buf, spa->spa_root, buflen); 1592168404Spjd} 1593168404Spjd 1594168404Spjdint 1595168404Spjdspa_sync_pass(spa_t *spa) 1596168404Spjd{ 1597168404Spjd return (spa->spa_sync_pass); 1598168404Spjd} 1599168404Spjd 1600168404Spjdchar * 1601168404Spjdspa_name(spa_t *spa) 1602168404Spjd{ 1603168404Spjd return (spa->spa_name); 1604168404Spjd} 1605168404Spjd 1606168404Spjduint64_t 1607168404Spjdspa_guid(spa_t *spa) 1608168404Spjd{ 1609239620Smm dsl_pool_t *dp = spa_get_dsl(spa); 1610239620Smm uint64_t guid; 1611239620Smm 1612168404Spjd /* 1613168404Spjd * If we fail to parse the config during spa_load(), we can go through 1614168404Spjd * the error path (which posts an ereport) and end up here with no root 1615228103Smm * vdev. We stash the original pool guid in 'spa_config_guid' to handle 1616168404Spjd * this case. 1617168404Spjd */ 1618239620Smm if (spa->spa_root_vdev == NULL) 1619239620Smm return (spa->spa_config_guid); 1620239620Smm 1621239620Smm guid = spa->spa_last_synced_guid != 0 ? 1622239620Smm spa->spa_last_synced_guid : spa->spa_root_vdev->vdev_guid; 1623239620Smm 1624239620Smm /* 1625239620Smm * Return the most recently synced out guid unless we're 1626239620Smm * in syncing context. 1627239620Smm */ 1628239620Smm if (dp && dsl_pool_sync_context(dp)) 1629168404Spjd return (spa->spa_root_vdev->vdev_guid); 1630168404Spjd else 1631239620Smm return (guid); 1632168404Spjd} 1633168404Spjd 1634168404Spjduint64_t 1635228103Smmspa_load_guid(spa_t *spa) 1636228103Smm{ 1637228103Smm /* 1638228103Smm * This is a GUID that exists solely as a reference for the 1639228103Smm * purposes of the arc. It is generated at load time, and 1640228103Smm * is never written to persistent storage. 1641228103Smm */ 1642228103Smm return (spa->spa_load_guid); 1643228103Smm} 1644228103Smm 1645228103Smmuint64_t 1646168404Spjdspa_last_synced_txg(spa_t *spa) 1647168404Spjd{ 1648168404Spjd return (spa->spa_ubsync.ub_txg); 1649168404Spjd} 1650168404Spjd 1651168404Spjduint64_t 1652168404Spjdspa_first_txg(spa_t *spa) 1653168404Spjd{ 1654168404Spjd return (spa->spa_first_txg); 1655168404Spjd} 1656168404Spjd 1657219089Spjduint64_t 1658219089Spjdspa_syncing_txg(spa_t *spa) 1659219089Spjd{ 1660219089Spjd return (spa->spa_syncing_txg); 1661219089Spjd} 1662219089Spjd 1663208047Smmpool_state_t 1664168404Spjdspa_state(spa_t *spa) 1665168404Spjd{ 1666168404Spjd return (spa->spa_state); 1667168404Spjd} 1668168404Spjd 1669219089Spjdspa_load_state_t 1670219089Spjdspa_load_state(spa_t *spa) 1671168404Spjd{ 1672219089Spjd return (spa->spa_load_state); 1673168404Spjd} 1674168404Spjd 1675168404Spjduint64_t 1676219089Spjdspa_freeze_txg(spa_t *spa) 1677168404Spjd{ 1678219089Spjd return (spa->spa_freeze_txg); 1679168404Spjd} 1680168404Spjd 1681219089Spjd/* ARGSUSED */ 1682168404Spjduint64_t 1683219089Spjdspa_get_asize(spa_t *spa, uint64_t lsize) 1684168404Spjd{ 1685260763Savg return (lsize * spa_asize_inflation); 1686168404Spjd} 1687168404Spjd 1688269006Sdelphij/* 1689269006Sdelphij * Return the amount of slop space in bytes. It is 1/32 of the pool (3.2%), 1690269006Sdelphij * or at least 32MB. 1691269006Sdelphij * 1692269006Sdelphij * See the comment above spa_slop_shift for details. 1693269006Sdelphij */ 1694168404Spjduint64_t 1695269006Sdelphijspa_get_slop_space(spa_t *spa) { 1696269006Sdelphij uint64_t space = spa_get_dspace(spa); 1697269006Sdelphij return (MAX(space >> spa_slop_shift, SPA_MINDEVSIZE >> 1)); 1698269006Sdelphij} 1699269006Sdelphij 1700269006Sdelphijuint64_t 1701168404Spjdspa_get_dspace(spa_t *spa) 1702168404Spjd{ 1703219089Spjd return (spa->spa_dspace); 1704168404Spjd} 1705168404Spjd 1706219089Spjdvoid 1707219089Spjdspa_update_dspace(spa_t *spa) 1708168404Spjd{ 1709219089Spjd spa->spa_dspace = metaslab_class_get_dspace(spa_normal_class(spa)) + 1710219089Spjd ddt_get_dedup_dspace(spa); 1711168404Spjd} 1712168404Spjd 1713185029Spjd/* 1714185029Spjd * Return the failure mode that has been set to this pool. The default 1715185029Spjd * behavior will be to block all I/Os when a complete failure occurs. 1716185029Spjd */ 1717185029Spjduint8_t 1718185029Spjdspa_get_failmode(spa_t *spa) 1719185029Spjd{ 1720185029Spjd return (spa->spa_failmode); 1721185029Spjd} 1722185029Spjd 1723185029Spjdboolean_t 1724185029Spjdspa_suspended(spa_t *spa) 1725185029Spjd{ 1726185029Spjd return (spa->spa_suspended); 1727185029Spjd} 1728185029Spjd 1729168404Spjduint64_t 1730168404Spjdspa_version(spa_t *spa) 1731168404Spjd{ 1732168404Spjd return (spa->spa_ubsync.ub_version); 1733168404Spjd} 1734168404Spjd 1735219089Spjdboolean_t 1736219089Spjdspa_deflate(spa_t *spa) 1737219089Spjd{ 1738219089Spjd return (spa->spa_deflate); 1739219089Spjd} 1740219089Spjd 1741219089Spjdmetaslab_class_t * 1742219089Spjdspa_normal_class(spa_t *spa) 1743219089Spjd{ 1744219089Spjd return (spa->spa_normal_class); 1745219089Spjd} 1746219089Spjd 1747219089Spjdmetaslab_class_t * 1748219089Spjdspa_log_class(spa_t *spa) 1749219089Spjd{ 1750219089Spjd return (spa->spa_log_class); 1751219089Spjd} 1752219089Spjd 1753288549Smavvoid 1754288549Smavspa_evicting_os_register(spa_t *spa, objset_t *os) 1755288549Smav{ 1756288549Smav mutex_enter(&spa->spa_evicting_os_lock); 1757288549Smav list_insert_head(&spa->spa_evicting_os_list, os); 1758288549Smav mutex_exit(&spa->spa_evicting_os_lock); 1759288549Smav} 1760288549Smav 1761288549Smavvoid 1762288549Smavspa_evicting_os_deregister(spa_t *spa, objset_t *os) 1763288549Smav{ 1764288549Smav mutex_enter(&spa->spa_evicting_os_lock); 1765288549Smav list_remove(&spa->spa_evicting_os_list, os); 1766288549Smav cv_broadcast(&spa->spa_evicting_os_cv); 1767288549Smav mutex_exit(&spa->spa_evicting_os_lock); 1768288549Smav} 1769288549Smav 1770288549Smavvoid 1771288549Smavspa_evicting_os_wait(spa_t *spa) 1772288549Smav{ 1773288549Smav mutex_enter(&spa->spa_evicting_os_lock); 1774288549Smav while (!list_is_empty(&spa->spa_evicting_os_list)) 1775288549Smav cv_wait(&spa->spa_evicting_os_cv, &spa->spa_evicting_os_lock); 1776288549Smav mutex_exit(&spa->spa_evicting_os_lock); 1777288549Smav 1778288549Smav dmu_buf_user_evict_wait(); 1779288549Smav} 1780288549Smav 1781168404Spjdint 1782168404Spjdspa_max_replication(spa_t *spa) 1783168404Spjd{ 1784168404Spjd /* 1785185029Spjd * As of SPA_VERSION == SPA_VERSION_DITTO_BLOCKS, we are able to 1786168404Spjd * handle BPs with more than one DVA allocated. Set our max 1787168404Spjd * replication level accordingly. 1788168404Spjd */ 1789185029Spjd if (spa_version(spa) < SPA_VERSION_DITTO_BLOCKS) 1790168404Spjd return (1); 1791168404Spjd return (MIN(SPA_DVAS_PER_BP, spa_max_replication_override)); 1792168404Spjd} 1793168404Spjd 1794219089Spjdint 1795219089Spjdspa_prev_software_version(spa_t *spa) 1796219089Spjd{ 1797219089Spjd return (spa->spa_prev_software_version); 1798219089Spjd} 1799219089Spjd 1800168404Spjduint64_t 1801247265Smmspa_deadman_synctime(spa_t *spa) 1802247265Smm{ 1803247265Smm return (spa->spa_deadman_synctime); 1804247265Smm} 1805247265Smm 1806247265Smmuint64_t 1807219089Spjddva_get_dsize_sync(spa_t *spa, const dva_t *dva) 1808168404Spjd{ 1809219089Spjd uint64_t asize = DVA_GET_ASIZE(dva); 1810219089Spjd uint64_t dsize = asize; 1811168404Spjd 1812219089Spjd ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); 1813168404Spjd 1814219089Spjd if (asize != 0 && spa->spa_deflate) { 1815290713Ssmh uint64_t vdev = DVA_GET_VDEV(dva); 1816290713Ssmh vdev_t *vd = vdev_lookup_top(spa, vdev); 1817290713Ssmh if (vd == NULL) { 1818290713Ssmh panic( 1819290713Ssmh "dva_get_dsize_sync(): bad DVA %llu:%llu", 1820290713Ssmh (u_longlong_t)vdev, (u_longlong_t)asize); 1821290713Ssmh } 1822219089Spjd dsize = (asize >> SPA_MINBLOCKSHIFT) * vd->vdev_deflate_ratio; 1823219089Spjd } 1824219089Spjd 1825219089Spjd return (dsize); 1826219089Spjd} 1827219089Spjd 1828219089Spjduint64_t 1829219089Spjdbp_get_dsize_sync(spa_t *spa, const blkptr_t *bp) 1830219089Spjd{ 1831219089Spjd uint64_t dsize = 0; 1832219089Spjd 1833268649Sdelphij for (int d = 0; d < BP_GET_NDVAS(bp); d++) 1834219089Spjd dsize += dva_get_dsize_sync(spa, &bp->blk_dva[d]); 1835219089Spjd 1836219089Spjd return (dsize); 1837219089Spjd} 1838219089Spjd 1839219089Spjduint64_t 1840219089Spjdbp_get_dsize(spa_t *spa, const blkptr_t *bp) 1841219089Spjd{ 1842219089Spjd uint64_t dsize = 0; 1843219089Spjd 1844185029Spjd spa_config_enter(spa, SCL_VDEV, FTAG, RW_READER); 1845219089Spjd 1846268649Sdelphij for (int d = 0; d < BP_GET_NDVAS(bp); d++) 1847219089Spjd dsize += dva_get_dsize_sync(spa, &bp->blk_dva[d]); 1848219089Spjd 1849185029Spjd spa_config_exit(spa, SCL_VDEV, FTAG); 1850219089Spjd 1851219089Spjd return (dsize); 1852168404Spjd} 1853168404Spjd 1854168404Spjd/* 1855168404Spjd * ========================================================================== 1856168404Spjd * Initialization and Termination 1857168404Spjd * ========================================================================== 1858168404Spjd */ 1859168404Spjd 1860168404Spjdstatic int 1861168404Spjdspa_name_compare(const void *a1, const void *a2) 1862168404Spjd{ 1863168404Spjd const spa_t *s1 = a1; 1864168404Spjd const spa_t *s2 = a2; 1865168404Spjd int s; 1866168404Spjd 1867168404Spjd s = strcmp(s1->spa_name, s2->spa_name); 1868168404Spjd if (s > 0) 1869168404Spjd return (1); 1870168404Spjd if (s < 0) 1871168404Spjd return (-1); 1872168404Spjd return (0); 1873168404Spjd} 1874168404Spjd 1875168404Spjdint 1876168404Spjdspa_busy(void) 1877168404Spjd{ 1878168404Spjd return (spa_active_count); 1879168404Spjd} 1880168404Spjd 1881168404Spjdvoid 1882185029Spjdspa_boot_init() 1883185029Spjd{ 1884185029Spjd spa_config_load(); 1885185029Spjd} 1886185029Spjd 1887253070Savg#ifdef _KERNEL 1888253070SavgEVENTHANDLER_DEFINE(mountroot, spa_boot_init, NULL, 0); 1889253070Savg#endif 1890253070Savg 1891185029Spjdvoid 1892168404Spjdspa_init(int mode) 1893168404Spjd{ 1894168404Spjd mutex_init(&spa_namespace_lock, NULL, MUTEX_DEFAULT, NULL); 1895185029Spjd mutex_init(&spa_spare_lock, NULL, MUTEX_DEFAULT, NULL); 1896185029Spjd mutex_init(&spa_l2cache_lock, NULL, MUTEX_DEFAULT, NULL); 1897168404Spjd cv_init(&spa_namespace_cv, NULL, CV_DEFAULT, NULL); 1898168404Spjd 1899168404Spjd avl_create(&spa_namespace_avl, spa_name_compare, sizeof (spa_t), 1900168404Spjd offsetof(spa_t, spa_avl)); 1901168404Spjd 1902185029Spjd avl_create(&spa_spare_avl, spa_spare_compare, sizeof (spa_aux_t), 1903185029Spjd offsetof(spa_aux_t, aux_avl)); 1904168404Spjd 1905185029Spjd avl_create(&spa_l2cache_avl, spa_l2cache_compare, sizeof (spa_aux_t), 1906185029Spjd offsetof(spa_aux_t, aux_avl)); 1907168404Spjd 1908209962Smm spa_mode_global = mode; 1909168404Spjd 1910240133Smm#ifdef illumos 1911247265Smm#ifdef _KERNEL 1912247265Smm spa_arch_init(); 1913247265Smm#else 1914240133Smm if (spa_mode_global != FREAD && dprintf_find_string("watch")) { 1915240133Smm arc_procfd = open("/proc/self/ctl", O_WRONLY); 1916240133Smm if (arc_procfd == -1) { 1917240133Smm perror("could not enable watchpoints: " 1918240133Smm "opening /proc/self/ctl failed: "); 1919240133Smm } else { 1920240133Smm arc_watch = B_TRUE; 1921240133Smm } 1922240133Smm } 1923240133Smm#endif 1924240133Smm#endif /* illumos */ 1925179310Spjd refcount_sysinit(); 1926168404Spjd unique_init(); 1927262093Savg range_tree_init(); 1928168404Spjd zio_init(); 1929260337Smav lz4_init(); 1930168404Spjd dmu_init(); 1931168404Spjd zil_init(); 1932185029Spjd vdev_cache_stat_init(); 1933185029Spjd zfs_prop_init(); 1934185029Spjd zpool_prop_init(); 1935236884Smm zpool_feature_init(); 1936168404Spjd spa_config_load(); 1937185029Spjd l2arc_start(); 1938247265Smm#ifndef illumos 1939247265Smm#ifdef _KERNEL 1940247265Smm zfs_deadman_init(); 1941247265Smm#endif 1942247265Smm#endif /* !illumos */ 1943168404Spjd} 1944168404Spjd 1945168404Spjdvoid 1946168404Spjdspa_fini(void) 1947168404Spjd{ 1948185029Spjd l2arc_stop(); 1949185029Spjd 1950168404Spjd spa_evict_all(); 1951168404Spjd 1952185029Spjd vdev_cache_stat_fini(); 1953168404Spjd zil_fini(); 1954168404Spjd dmu_fini(); 1955260337Smav lz4_fini(); 1956168404Spjd zio_fini(); 1957262093Savg range_tree_fini(); 1958185029Spjd unique_fini(); 1959168404Spjd refcount_fini(); 1960168404Spjd 1961168404Spjd avl_destroy(&spa_namespace_avl); 1962168404Spjd avl_destroy(&spa_spare_avl); 1963185029Spjd avl_destroy(&spa_l2cache_avl); 1964168404Spjd 1965168404Spjd cv_destroy(&spa_namespace_cv); 1966168404Spjd mutex_destroy(&spa_namespace_lock); 1967168404Spjd mutex_destroy(&spa_spare_lock); 1968185029Spjd mutex_destroy(&spa_l2cache_lock); 1969168404Spjd} 1970185029Spjd 1971185029Spjd/* 1972185029Spjd * Return whether this pool has slogs. No locking needed. 1973185029Spjd * It's not a problem if the wrong answer is returned as it's only for 1974185029Spjd * performance and not correctness 1975185029Spjd */ 1976185029Spjdboolean_t 1977185029Spjdspa_has_slogs(spa_t *spa) 1978185029Spjd{ 1979185029Spjd return (spa->spa_log_class->mc_rotor != NULL); 1980185029Spjd} 1981185029Spjd 1982219089Spjdspa_log_state_t 1983219089Spjdspa_get_log_state(spa_t *spa) 1984219089Spjd{ 1985219089Spjd return (spa->spa_log_state); 1986219089Spjd} 1987219089Spjd 1988219089Spjdvoid 1989219089Spjdspa_set_log_state(spa_t *spa, spa_log_state_t state) 1990219089Spjd{ 1991219089Spjd spa->spa_log_state = state; 1992219089Spjd} 1993219089Spjd 1994185029Spjdboolean_t 1995185029Spjdspa_is_root(spa_t *spa) 1996185029Spjd{ 1997185029Spjd return (spa->spa_is_root); 1998185029Spjd} 1999209962Smm 2000209962Smmboolean_t 2001209962Smmspa_writeable(spa_t *spa) 2002209962Smm{ 2003209962Smm return (!!(spa->spa_mode & FWRITE)); 2004209962Smm} 2005209962Smm 2006269418Sdelphij/* 2007269418Sdelphij * Returns true if there is a pending sync task in any of the current 2008269418Sdelphij * syncing txg, the current quiescing txg, or the current open txg. 2009269418Sdelphij */ 2010269418Sdelphijboolean_t 2011269418Sdelphijspa_has_pending_synctask(spa_t *spa) 2012269418Sdelphij{ 2013269418Sdelphij return (!txg_all_lists_empty(&spa->spa_dsl_pool->dp_sync_tasks)); 2014269418Sdelphij} 2015269418Sdelphij 2016209962Smmint 2017209962Smmspa_mode(spa_t *spa) 2018209962Smm{ 2019209962Smm return (spa->spa_mode); 2020209962Smm} 2021219089Spjd 2022219089Spjduint64_t 2023219089Spjdspa_bootfs(spa_t *spa) 2024219089Spjd{ 2025219089Spjd return (spa->spa_bootfs); 2026219089Spjd} 2027219089Spjd 2028219089Spjduint64_t 2029219089Spjdspa_delegation(spa_t *spa) 2030219089Spjd{ 2031219089Spjd return (spa->spa_delegation); 2032219089Spjd} 2033219089Spjd 2034219089Spjdobjset_t * 2035219089Spjdspa_meta_objset(spa_t *spa) 2036219089Spjd{ 2037219089Spjd return (spa->spa_meta_objset); 2038219089Spjd} 2039219089Spjd 2040219089Spjdenum zio_checksum 2041219089Spjdspa_dedup_checksum(spa_t *spa) 2042219089Spjd{ 2043219089Spjd return (spa->spa_dedup_checksum); 2044219089Spjd} 2045219089Spjd 2046219089Spjd/* 2047219089Spjd * Reset pool scan stat per scan pass (or reboot). 2048219089Spjd */ 2049219089Spjdvoid 2050219089Spjdspa_scan_stat_init(spa_t *spa) 2051219089Spjd{ 2052219089Spjd /* data not stored on disk */ 2053219089Spjd spa->spa_scan_pass_start = gethrestime_sec(); 2054219089Spjd spa->spa_scan_pass_exam = 0; 2055219089Spjd vdev_scan_stat_init(spa->spa_root_vdev); 2056219089Spjd} 2057219089Spjd 2058219089Spjd/* 2059219089Spjd * Get scan stats for zpool status reports 2060219089Spjd */ 2061219089Spjdint 2062219089Spjdspa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps) 2063219089Spjd{ 2064219089Spjd dsl_scan_t *scn = spa->spa_dsl_pool ? spa->spa_dsl_pool->dp_scan : NULL; 2065219089Spjd 2066219089Spjd if (scn == NULL || scn->scn_phys.scn_func == POOL_SCAN_NONE) 2067249195Smm return (SET_ERROR(ENOENT)); 2068219089Spjd bzero(ps, sizeof (pool_scan_stat_t)); 2069219089Spjd 2070219089Spjd /* data stored on disk */ 2071219089Spjd ps->pss_func = scn->scn_phys.scn_func; 2072219089Spjd ps->pss_start_time = scn->scn_phys.scn_start_time; 2073219089Spjd ps->pss_end_time = scn->scn_phys.scn_end_time; 2074219089Spjd ps->pss_to_examine = scn->scn_phys.scn_to_examine; 2075219089Spjd ps->pss_examined = scn->scn_phys.scn_examined; 2076219089Spjd ps->pss_to_process = scn->scn_phys.scn_to_process; 2077219089Spjd ps->pss_processed = scn->scn_phys.scn_processed; 2078219089Spjd ps->pss_errors = scn->scn_phys.scn_errors; 2079219089Spjd ps->pss_state = scn->scn_phys.scn_state; 2080219089Spjd 2081219089Spjd /* data not stored on disk */ 2082219089Spjd ps->pss_pass_start = spa->spa_scan_pass_start; 2083219089Spjd ps->pss_pass_exam = spa->spa_scan_pass_exam; 2084219089Spjd 2085219089Spjd return (0); 2086219089Spjd} 2087224177Smm 2088224177Smmboolean_t 2089224177Smmspa_debug_enabled(spa_t *spa) 2090224177Smm{ 2091224177Smm return (spa->spa_debug); 2092224177Smm} 2093276081Sdelphij 2094276081Sdelphijint 2095276081Sdelphijspa_maxblocksize(spa_t *spa) 2096276081Sdelphij{ 2097276081Sdelphij if (spa_feature_is_enabled(spa, SPA_FEATURE_LARGE_BLOCKS)) 2098276081Sdelphij return (SPA_MAXBLOCKSIZE); 2099276081Sdelphij else 2100276081Sdelphij return (SPA_OLD_MAXBLOCKSIZE); 2101276081Sdelphij} 2102