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. 23*94c2d0ebSMatthew Ahrens * Copyright (c) 2011, 2017 by Delphix. All rights reserved. 24e495b6e6SSaso Kiselkov * Copyright 2015 Nexenta Systems, Inc. All rights reserved. 25bc9014e6SJustin Gibbs * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 2645818ee1SMatthew Ahrens * Copyright 2013 Saso Kiselkov. All rights reserved. 27c3d26abcSMatthew Ahrens * Copyright (c) 2014 Integros [integros.com] 28fa9e4066Sahrens */ 29fa9e4066Sahrens 30fa9e4066Sahrens #include <sys/zfs_context.h> 31fa9e4066Sahrens #include <sys/spa_impl.h> 32283b8460SGeorge.Wilson #include <sys/spa_boot.h> 33fa9e4066Sahrens #include <sys/zio.h> 34fa9e4066Sahrens #include <sys/zio_checksum.h> 35fa9e4066Sahrens #include <sys/zio_compress.h> 36fa9e4066Sahrens #include <sys/dmu.h> 37fa9e4066Sahrens #include <sys/dmu_tx.h> 38fa9e4066Sahrens #include <sys/zap.h> 39fa9e4066Sahrens #include <sys/zil.h> 40fa9e4066Sahrens #include <sys/vdev_impl.h> 41fa9e4066Sahrens #include <sys/metaslab.h> 42fa9e4066Sahrens #include <sys/uberblock_impl.h> 43fa9e4066Sahrens #include <sys/txg.h> 44fa9e4066Sahrens #include <sys/avl.h> 45fa9e4066Sahrens #include <sys/unique.h> 46fa9e4066Sahrens #include <sys/dsl_pool.h> 47fa9e4066Sahrens #include <sys/dsl_dir.h> 48fa9e4066Sahrens #include <sys/dsl_prop.h> 493f9d6ad7SLin Ling #include <sys/dsl_scan.h> 50fa9e4066Sahrens #include <sys/fs/zfs.h> 516ce0521aSperrin #include <sys/metaslab_impl.h> 52e14bb325SJeff Bonwick #include <sys/arc.h> 53485bbbf5SGeorge Wilson #include <sys/ddt.h> 5491ebeef5Sahrens #include "zfs_prop.h" 5545818ee1SMatthew Ahrens #include <sys/zfeature.h> 56fa9e4066Sahrens 57fa9e4066Sahrens /* 58fa9e4066Sahrens * SPA locking 59fa9e4066Sahrens * 60fa9e4066Sahrens * There are four basic locks for managing spa_t structures: 61fa9e4066Sahrens * 62fa9e4066Sahrens * spa_namespace_lock (global mutex) 63fa9e4066Sahrens * 6444cd46caSbillm * This lock must be acquired to do any of the following: 65fa9e4066Sahrens * 6644cd46caSbillm * - Lookup a spa_t by name 6744cd46caSbillm * - Add or remove a spa_t from the namespace 6844cd46caSbillm * - Increase spa_refcount from non-zero 6944cd46caSbillm * - Check if spa_refcount is zero 7044cd46caSbillm * - Rename a spa_t 71ea8dc4b6Seschrock * - add/remove/attach/detach devices 7244cd46caSbillm * - Held for the duration of create/destroy/import/export 73fa9e4066Sahrens * 7444cd46caSbillm * It does not need to handle recursion. A create or destroy may 7544cd46caSbillm * reference objects (files or zvols) in other pools, but by 7644cd46caSbillm * definition they must have an existing reference, and will never need 7744cd46caSbillm * to lookup a spa_t by name. 78fa9e4066Sahrens * 79fa9e4066Sahrens * spa_refcount (per-spa refcount_t protected by mutex) 80fa9e4066Sahrens * 8144cd46caSbillm * This reference count keep track of any active users of the spa_t. The 8244cd46caSbillm * spa_t cannot be destroyed or freed while this is non-zero. Internally, 8344cd46caSbillm * the refcount is never really 'zero' - opening a pool implicitly keeps 84088f3894Sahrens * some references in the DMU. Internally we check against spa_minref, but 8544cd46caSbillm * present the image of a zero/non-zero value to consumers. 86fa9e4066Sahrens * 87e14bb325SJeff Bonwick * spa_config_lock[] (per-spa array of rwlocks) 88fa9e4066Sahrens * 8991ebeef5Sahrens * This protects the spa_t from config changes, and must be held in 9091ebeef5Sahrens * the following circumstances: 91fa9e4066Sahrens * 9244cd46caSbillm * - RW_READER to perform I/O to the spa 9344cd46caSbillm * - RW_WRITER to change the vdev config 94fa9e4066Sahrens * 95fa9e4066Sahrens * The locking order is fairly straightforward: 96fa9e4066Sahrens * 9744cd46caSbillm * spa_namespace_lock -> spa_refcount 98fa9e4066Sahrens * 9944cd46caSbillm * The namespace lock must be acquired to increase the refcount from 0 10044cd46caSbillm * or to check if it is zero. 101fa9e4066Sahrens * 102e14bb325SJeff Bonwick * spa_refcount -> spa_config_lock[] 103fa9e4066Sahrens * 10444cd46caSbillm * There must be at least one valid reference on the spa_t to acquire 10544cd46caSbillm * the config lock. 106fa9e4066Sahrens * 107e14bb325SJeff Bonwick * spa_namespace_lock -> spa_config_lock[] 108fa9e4066Sahrens * 10944cd46caSbillm * The namespace lock must always be taken before the config lock. 110fa9e4066Sahrens * 111fa9e4066Sahrens * 112e14bb325SJeff Bonwick * The spa_namespace_lock can be acquired directly and is globally visible. 113fa9e4066Sahrens * 114e14bb325SJeff Bonwick * The namespace is manipulated using the following functions, all of which 115e14bb325SJeff Bonwick * require the spa_namespace_lock to be held. 116fa9e4066Sahrens * 11744cd46caSbillm * spa_lookup() Lookup a spa_t by name. 118fa9e4066Sahrens * 11944cd46caSbillm * spa_add() Create a new spa_t in the namespace. 120fa9e4066Sahrens * 12144cd46caSbillm * spa_remove() Remove a spa_t from the namespace. This also 12244cd46caSbillm * frees up any memory associated with the spa_t. 123fa9e4066Sahrens * 12444cd46caSbillm * spa_next() Returns the next spa_t in the system, or the 12544cd46caSbillm * first if NULL is passed. 126fa9e4066Sahrens * 12744cd46caSbillm * spa_evict_all() Shutdown and remove all spa_t structures in 12844cd46caSbillm * the system. 129fa9e4066Sahrens * 130ea8dc4b6Seschrock * spa_guid_exists() Determine whether a pool/device guid exists. 131fa9e4066Sahrens * 132fa9e4066Sahrens * The spa_refcount is manipulated using the following functions: 133fa9e4066Sahrens * 13444cd46caSbillm * spa_open_ref() Adds a reference to the given spa_t. Must be 13544cd46caSbillm * called with spa_namespace_lock held if the 13644cd46caSbillm * refcount is currently zero. 137fa9e4066Sahrens * 13844cd46caSbillm * spa_close() Remove a reference from the spa_t. This will 13944cd46caSbillm * not free the spa_t or remove it from the 14044cd46caSbillm * namespace. No locking is required. 141fa9e4066Sahrens * 14244cd46caSbillm * spa_refcount_zero() Returns true if the refcount is currently 14344cd46caSbillm * zero. Must be called with spa_namespace_lock 14444cd46caSbillm * held. 145fa9e4066Sahrens * 146e14bb325SJeff Bonwick * The spa_config_lock[] is an array of rwlocks, ordered as follows: 147e14bb325SJeff Bonwick * SCL_CONFIG > SCL_STATE > SCL_ALLOC > SCL_ZIO > SCL_FREE > SCL_VDEV. 148e14bb325SJeff Bonwick * spa_config_lock[] is manipulated with spa_config_{enter,exit,held}(). 149e14bb325SJeff Bonwick * 150e14bb325SJeff Bonwick * To read the configuration, it suffices to hold one of these locks as reader. 151e14bb325SJeff Bonwick * To modify the configuration, you must hold all locks as writer. To modify 152e14bb325SJeff Bonwick * vdev state without altering the vdev tree's topology (e.g. online/offline), 153e14bb325SJeff Bonwick * you must hold SCL_STATE and SCL_ZIO as writer. 154e14bb325SJeff Bonwick * 155e14bb325SJeff Bonwick * We use these distinct config locks to avoid recursive lock entry. 156e14bb325SJeff Bonwick * For example, spa_sync() (which holds SCL_CONFIG as reader) induces 157e14bb325SJeff Bonwick * block allocations (SCL_ALLOC), which may require reading space maps 158e14bb325SJeff Bonwick * from disk (dmu_read() -> zio_read() -> SCL_ZIO). 159e14bb325SJeff Bonwick * 160e14bb325SJeff Bonwick * The spa config locks cannot be normal rwlocks because we need the 161e14bb325SJeff Bonwick * ability to hand off ownership. For example, SCL_ZIO is acquired 162e14bb325SJeff Bonwick * by the issuing thread and later released by an interrupt thread. 163e14bb325SJeff Bonwick * They do, however, obey the usual write-wanted semantics to prevent 164e14bb325SJeff Bonwick * writer (i.e. system administrator) starvation. 165e14bb325SJeff Bonwick * 166e14bb325SJeff Bonwick * The lock acquisition rules are as follows: 167e14bb325SJeff Bonwick * 168e14bb325SJeff Bonwick * SCL_CONFIG 169e14bb325SJeff Bonwick * Protects changes to the vdev tree topology, such as vdev 170e14bb325SJeff Bonwick * add/remove/attach/detach. Protects the dirty config list 171e14bb325SJeff Bonwick * (spa_config_dirty_list) and the set of spares and l2arc devices. 172e14bb325SJeff Bonwick * 173e14bb325SJeff Bonwick * SCL_STATE 174e14bb325SJeff Bonwick * Protects changes to pool state and vdev state, such as vdev 175e14bb325SJeff Bonwick * online/offline/fault/degrade/clear. Protects the dirty state list 176e14bb325SJeff Bonwick * (spa_state_dirty_list) and global pool state (spa_state). 177e14bb325SJeff Bonwick * 178e14bb325SJeff Bonwick * SCL_ALLOC 179e14bb325SJeff Bonwick * Protects changes to metaslab groups and classes. 180e14bb325SJeff Bonwick * Held as reader by metaslab_alloc() and metaslab_claim(). 181e14bb325SJeff Bonwick * 182e14bb325SJeff Bonwick * SCL_ZIO 183e14bb325SJeff Bonwick * Held by bp-level zios (those which have no io_vd upon entry) 184e14bb325SJeff Bonwick * to prevent changes to the vdev tree. The bp-level zio implicitly 185e14bb325SJeff Bonwick * protects all of its vdev child zios, which do not hold SCL_ZIO. 186e14bb325SJeff Bonwick * 187e14bb325SJeff Bonwick * SCL_FREE 188e14bb325SJeff Bonwick * Protects changes to metaslab groups and classes. 189e14bb325SJeff Bonwick * Held as reader by metaslab_free(). SCL_FREE is distinct from 190e14bb325SJeff Bonwick * SCL_ALLOC, and lower than SCL_ZIO, so that we can safely free 191e14bb325SJeff Bonwick * blocks in zio_done() while another i/o that holds either 192e14bb325SJeff Bonwick * SCL_ALLOC or SCL_ZIO is waiting for this i/o to complete. 193e14bb325SJeff Bonwick * 194e14bb325SJeff Bonwick * SCL_VDEV 195e14bb325SJeff Bonwick * Held as reader to prevent changes to the vdev tree during trivial 196b24ab676SJeff Bonwick * inquiries such as bp_get_dsize(). SCL_VDEV is distinct from the 197e14bb325SJeff Bonwick * other locks, and lower than all of them, to ensure that it's safe 198e14bb325SJeff Bonwick * to acquire regardless of caller context. 199e14bb325SJeff Bonwick * 200e14bb325SJeff Bonwick * In addition, the following rules apply: 201e14bb325SJeff Bonwick * 202e14bb325SJeff Bonwick * (a) spa_props_lock protects pool properties, spa_config and spa_config_list. 203e14bb325SJeff Bonwick * The lock ordering is SCL_CONFIG > spa_props_lock. 204e14bb325SJeff Bonwick * 205e14bb325SJeff Bonwick * (b) I/O operations on leaf vdevs. For any zio operation that takes 206e14bb325SJeff Bonwick * an explicit vdev_t argument -- such as zio_ioctl(), zio_read_phys(), 207e14bb325SJeff Bonwick * or zio_write_phys() -- the caller must ensure that the config cannot 208e14bb325SJeff Bonwick * cannot change in the interim, and that the vdev cannot be reopened. 209e14bb325SJeff Bonwick * SCL_STATE as reader suffices for both. 210fa9e4066Sahrens * 211ea8dc4b6Seschrock * The vdev configuration is protected by spa_vdev_enter() / spa_vdev_exit(). 212fa9e4066Sahrens * 21344cd46caSbillm * spa_vdev_enter() Acquire the namespace lock and the config lock 214ea8dc4b6Seschrock * for writing. 215fa9e4066Sahrens * 21644cd46caSbillm * spa_vdev_exit() Release the config lock, wait for all I/O 21744cd46caSbillm * to complete, sync the updated configs to the 218ea8dc4b6Seschrock * cache, and release the namespace lock. 219fa9e4066Sahrens * 220e14bb325SJeff Bonwick * vdev state is protected by spa_vdev_state_enter() / spa_vdev_state_exit(). 221e14bb325SJeff Bonwick * Like spa_vdev_enter/exit, these are convenience wrappers -- the actual 222e14bb325SJeff Bonwick * locking is, always, based on spa_namespace_lock and spa_config_lock[]. 223e14bb325SJeff Bonwick * 224ad135b5dSChristopher Siden * spa_rename() is also implemented within this file since it requires 225e14bb325SJeff Bonwick * manipulation of the namespace. 226fa9e4066Sahrens */ 227fa9e4066Sahrens 228fa9e4066Sahrens static avl_tree_t spa_namespace_avl; 229fa9e4066Sahrens kmutex_t spa_namespace_lock; 230fa9e4066Sahrens static kcondvar_t spa_namespace_cv; 2310373e76bSbonwick static int spa_active_count; 232416e0cd8Sek int spa_max_replication_override = SPA_DVAS_PER_BP; 233fa9e4066Sahrens 23499653d4eSeschrock static kmutex_t spa_spare_lock; 23539c23413Seschrock static avl_tree_t spa_spare_avl; 236fa94a07fSbrendan static kmutex_t spa_l2cache_lock; 237fa94a07fSbrendan static avl_tree_t spa_l2cache_avl; 23899653d4eSeschrock 239fa9e4066Sahrens kmem_cache_t *spa_buffer_pool; 2408ad4d6ddSJeff Bonwick int spa_mode_global; 241fa9e4066Sahrens 242fa9e4066Sahrens #ifdef ZFS_DEBUG 2433b2aab18SMatthew Ahrens /* Everything except dprintf and spa is on by default in debug builds */ 2443b2aab18SMatthew Ahrens int zfs_flags = ~(ZFS_DEBUG_DPRINTF | ZFS_DEBUG_SPA); 245fa9e4066Sahrens #else 246fa9e4066Sahrens int zfs_flags = 0; 247fa9e4066Sahrens #endif 248fa9e4066Sahrens 2490125049cSahrens /* 2500125049cSahrens * zfs_recover can be set to nonzero to attempt to recover from 2510125049cSahrens * otherwise-fatal errors, typically caused by on-disk corruption. When 2520125049cSahrens * set, calls to zfs_panic_recover() will turn into warning messages. 2538b36997aSMatthew Ahrens * This should only be used as a last resort, as it typically results 2548b36997aSMatthew Ahrens * in leaked space, or worse. 2550125049cSahrens */ 2567fd05ac4SMatthew Ahrens boolean_t zfs_recover = B_FALSE; 2577fd05ac4SMatthew Ahrens 2587fd05ac4SMatthew Ahrens /* 2597fd05ac4SMatthew Ahrens * If destroy encounters an EIO while reading metadata (e.g. indirect 2607fd05ac4SMatthew Ahrens * blocks), space referenced by the missing metadata can not be freed. 2617fd05ac4SMatthew Ahrens * Normally this causes the background destroy to become "stalled", as 2627fd05ac4SMatthew Ahrens * it is unable to make forward progress. While in this stalled state, 2637fd05ac4SMatthew Ahrens * all remaining space to free from the error-encountering filesystem is 2647fd05ac4SMatthew Ahrens * "temporarily leaked". Set this flag to cause it to ignore the EIO, 2657fd05ac4SMatthew Ahrens * permanently leak the space from indirect blocks that can not be read, 2667fd05ac4SMatthew Ahrens * and continue to free everything else that it can. 2677fd05ac4SMatthew Ahrens * 2687fd05ac4SMatthew Ahrens * The default, "stalling" behavior is useful if the storage partially 2697fd05ac4SMatthew Ahrens * fails (i.e. some but not all i/os fail), and then later recovers. In 2707fd05ac4SMatthew Ahrens * this case, we will be able to continue pool operations while it is 2717fd05ac4SMatthew Ahrens * partially failed, and when it recovers, we can continue to free the 2727fd05ac4SMatthew Ahrens * space, with no leaks. However, note that this case is actually 2737fd05ac4SMatthew Ahrens * fairly rare. 2747fd05ac4SMatthew Ahrens * 2757fd05ac4SMatthew Ahrens * Typically pools either (a) fail completely (but perhaps temporarily, 2767fd05ac4SMatthew Ahrens * e.g. a top-level vdev going offline), or (b) have localized, 2777fd05ac4SMatthew Ahrens * permanent errors (e.g. disk returns the wrong data due to bit flip or 2787fd05ac4SMatthew Ahrens * firmware bug). In case (a), this setting does not matter because the 2797fd05ac4SMatthew Ahrens * pool will be suspended and the sync thread will not be able to make 2807fd05ac4SMatthew Ahrens * forward progress regardless. In case (b), because the error is 2817fd05ac4SMatthew Ahrens * permanent, the best we can do is leak the minimum amount of space, 2827fd05ac4SMatthew Ahrens * which is what setting this flag will do. Therefore, it is reasonable 2837fd05ac4SMatthew Ahrens * for this flag to normally be set, but we chose the more conservative 2847fd05ac4SMatthew Ahrens * approach of not setting it, so that there is no possibility of 2857fd05ac4SMatthew Ahrens * leaking space in the "partial temporary" failure case. 2867fd05ac4SMatthew Ahrens */ 2877fd05ac4SMatthew Ahrens boolean_t zfs_free_leak_on_eio = B_FALSE; 2880125049cSahrens 28969962b56SMatthew Ahrens /* 29069962b56SMatthew Ahrens * Expiration time in milliseconds. This value has two meanings. First it is 29169962b56SMatthew Ahrens * used to determine when the spa_deadman() logic should fire. By default the 29269962b56SMatthew Ahrens * spa_deadman() will fire if spa_sync() has not completed in 1000 seconds. 29369962b56SMatthew Ahrens * Secondly, the value determines if an I/O is considered "hung". Any I/O that 29469962b56SMatthew Ahrens * has not completed in zfs_deadman_synctime_ms is considered "hung" resulting 29569962b56SMatthew Ahrens * in a system panic. 29669962b56SMatthew Ahrens */ 29769962b56SMatthew Ahrens uint64_t zfs_deadman_synctime_ms = 1000000ULL; 298283b8460SGeorge.Wilson 299283b8460SGeorge.Wilson /* 30069962b56SMatthew Ahrens * Check time in milliseconds. This defines the frequency at which we check 30169962b56SMatthew Ahrens * for hung I/O. 302283b8460SGeorge.Wilson */ 30369962b56SMatthew Ahrens uint64_t zfs_deadman_checktime_ms = 5000ULL; 304283b8460SGeorge.Wilson 305283b8460SGeorge.Wilson /* 306283b8460SGeorge.Wilson * Override the zfs deadman behavior via /etc/system. By default the 307283b8460SGeorge.Wilson * deadman is enabled except on VMware and sparc deployments. 308283b8460SGeorge.Wilson */ 309283b8460SGeorge.Wilson int zfs_deadman_enabled = -1; 310283b8460SGeorge.Wilson 31169962b56SMatthew Ahrens /* 31269962b56SMatthew Ahrens * The worst case is single-sector max-parity RAID-Z blocks, in which 31369962b56SMatthew Ahrens * case the space requirement is exactly (VDEV_RAIDZ_MAXPARITY + 1) 31469962b56SMatthew Ahrens * times the size; so just assume that. Add to this the fact that 31569962b56SMatthew Ahrens * we can have up to 3 DVAs per bp, and one more factor of 2 because 31669962b56SMatthew Ahrens * the block may be dittoed with up to 3 DVAs by ddt_sync(). All together, 31769962b56SMatthew Ahrens * the worst case is: 31869962b56SMatthew Ahrens * (VDEV_RAIDZ_MAXPARITY + 1) * SPA_DVAS_PER_BP * 2 == 24 31969962b56SMatthew Ahrens */ 32069962b56SMatthew Ahrens int spa_asize_inflation = 24; 321fa9e4066Sahrens 3227d46dc6cSMatthew Ahrens /* 3237d46dc6cSMatthew Ahrens * Normally, we don't allow the last 3.2% (1/(2^spa_slop_shift)) of space in 3247d46dc6cSMatthew Ahrens * the pool to be consumed. This ensures that we don't run the pool 3257d46dc6cSMatthew Ahrens * completely out of space, due to unaccounted changes (e.g. to the MOS). 3267d46dc6cSMatthew Ahrens * It also limits the worst-case time to allocate space. If we have 3277d46dc6cSMatthew Ahrens * less than this amount of free space, most ZPL operations (e.g. write, 3287d46dc6cSMatthew Ahrens * create) will return ENOSPC. 3297d46dc6cSMatthew Ahrens * 3307d46dc6cSMatthew Ahrens * Certain operations (e.g. file removal, most administrative actions) can 3317d46dc6cSMatthew Ahrens * use half the slop space. They will only return ENOSPC if less than half 3327d46dc6cSMatthew Ahrens * the slop space is free. Typically, once the pool has less than the slop 3337d46dc6cSMatthew Ahrens * space free, the user will use these operations to free up space in the pool. 3347d46dc6cSMatthew Ahrens * These are the operations that call dsl_pool_adjustedsize() with the netfree 3357d46dc6cSMatthew Ahrens * argument set to TRUE. 3367d46dc6cSMatthew Ahrens * 3377d46dc6cSMatthew Ahrens * A very restricted set of operations are always permitted, regardless of 3387d46dc6cSMatthew Ahrens * the amount of free space. These are the operations that call 3397d46dc6cSMatthew Ahrens * dsl_sync_task(ZFS_SPACE_CHECK_NONE), e.g. "zfs destroy". If these 3407d46dc6cSMatthew Ahrens * operations result in a net increase in the amount of space used, 3417d46dc6cSMatthew Ahrens * it is possible to run the pool completely out of space, causing it to 3427d46dc6cSMatthew Ahrens * be permanently read-only. 3437d46dc6cSMatthew Ahrens * 3444b5c8e93SMatthew Ahrens * Note that on very small pools, the slop space will be larger than 3454b5c8e93SMatthew Ahrens * 3.2%, in an effort to have it be at least spa_min_slop (128MB), 3464b5c8e93SMatthew Ahrens * but we never allow it to be more than half the pool size. 3474b5c8e93SMatthew Ahrens * 3487d46dc6cSMatthew Ahrens * See also the comments in zfs_space_check_t. 3497d46dc6cSMatthew Ahrens */ 3507d46dc6cSMatthew Ahrens int spa_slop_shift = 5; 3514b5c8e93SMatthew Ahrens uint64_t spa_min_slop = 128 * 1024 * 1024; 3527d46dc6cSMatthew Ahrens 353e05725b1Sbonwick /* 354e05725b1Sbonwick * ========================================================================== 355e05725b1Sbonwick * SPA config locking 356e05725b1Sbonwick * ========================================================================== 357e05725b1Sbonwick */ 358e05725b1Sbonwick static void 359e14bb325SJeff Bonwick spa_config_lock_init(spa_t *spa) 360e14bb325SJeff Bonwick { 361e14bb325SJeff Bonwick for (int i = 0; i < SCL_LOCKS; i++) { 362e14bb325SJeff Bonwick spa_config_lock_t *scl = &spa->spa_config_lock[i]; 363e14bb325SJeff Bonwick mutex_init(&scl->scl_lock, NULL, MUTEX_DEFAULT, NULL); 364e14bb325SJeff Bonwick cv_init(&scl->scl_cv, NULL, CV_DEFAULT, NULL); 3653b2aab18SMatthew Ahrens refcount_create_untracked(&scl->scl_count); 366e14bb325SJeff Bonwick scl->scl_writer = NULL; 367e14bb325SJeff Bonwick scl->scl_write_wanted = 0; 368e14bb325SJeff Bonwick } 369e05725b1Sbonwick } 370e05725b1Sbonwick 371e05725b1Sbonwick static void 372e14bb325SJeff Bonwick spa_config_lock_destroy(spa_t *spa) 373e14bb325SJeff Bonwick { 374e14bb325SJeff Bonwick for (int i = 0; i < SCL_LOCKS; i++) { 375e14bb325SJeff Bonwick spa_config_lock_t *scl = &spa->spa_config_lock[i]; 376e14bb325SJeff Bonwick mutex_destroy(&scl->scl_lock); 377e14bb325SJeff Bonwick cv_destroy(&scl->scl_cv); 378e14bb325SJeff Bonwick refcount_destroy(&scl->scl_count); 379e14bb325SJeff Bonwick ASSERT(scl->scl_writer == NULL); 380e14bb325SJeff Bonwick ASSERT(scl->scl_write_wanted == 0); 381e14bb325SJeff Bonwick } 382e14bb325SJeff Bonwick } 383e14bb325SJeff Bonwick 384e14bb325SJeff Bonwick int 385e14bb325SJeff Bonwick spa_config_tryenter(spa_t *spa, int locks, void *tag, krw_t rw) 386e05725b1Sbonwick { 387e14bb325SJeff Bonwick for (int i = 0; i < SCL_LOCKS; i++) { 388e14bb325SJeff Bonwick spa_config_lock_t *scl = &spa->spa_config_lock[i]; 389e14bb325SJeff Bonwick if (!(locks & (1 << i))) 390e14bb325SJeff Bonwick continue; 391e14bb325SJeff Bonwick mutex_enter(&scl->scl_lock); 392e14bb325SJeff Bonwick if (rw == RW_READER) { 393e14bb325SJeff Bonwick if (scl->scl_writer || scl->scl_write_wanted) { 394e14bb325SJeff Bonwick mutex_exit(&scl->scl_lock); 395e495b6e6SSaso Kiselkov spa_config_exit(spa, locks & ((1 << i) - 1), 396e495b6e6SSaso Kiselkov tag); 397e14bb325SJeff Bonwick return (0); 398e14bb325SJeff Bonwick } 399e14bb325SJeff Bonwick } else { 400e14bb325SJeff Bonwick ASSERT(scl->scl_writer != curthread); 401e14bb325SJeff Bonwick if (!refcount_is_zero(&scl->scl_count)) { 402e14bb325SJeff Bonwick mutex_exit(&scl->scl_lock); 403e495b6e6SSaso Kiselkov spa_config_exit(spa, locks & ((1 << i) - 1), 404e495b6e6SSaso Kiselkov tag); 405e14bb325SJeff Bonwick return (0); 406e14bb325SJeff Bonwick } 407e14bb325SJeff Bonwick scl->scl_writer = curthread; 408e14bb325SJeff Bonwick } 409e14bb325SJeff Bonwick (void) refcount_add(&scl->scl_count, tag); 410e14bb325SJeff Bonwick mutex_exit(&scl->scl_lock); 411e14bb325SJeff Bonwick } 412e14bb325SJeff Bonwick return (1); 413e05725b1Sbonwick } 414e05725b1Sbonwick 415e05725b1Sbonwick void 416e14bb325SJeff Bonwick spa_config_enter(spa_t *spa, int locks, void *tag, krw_t rw) 417e05725b1Sbonwick { 418f64c0e34SEric Taylor int wlocks_held = 0; 419f64c0e34SEric Taylor 4203b2aab18SMatthew Ahrens ASSERT3U(SCL_LOCKS, <, sizeof (wlocks_held) * NBBY); 4213b2aab18SMatthew Ahrens 422e14bb325SJeff Bonwick for (int i = 0; i < SCL_LOCKS; i++) { 423e14bb325SJeff Bonwick spa_config_lock_t *scl = &spa->spa_config_lock[i]; 424f64c0e34SEric Taylor if (scl->scl_writer == curthread) 425f64c0e34SEric Taylor wlocks_held |= (1 << i); 426e14bb325SJeff Bonwick if (!(locks & (1 << i))) 427e14bb325SJeff Bonwick continue; 428e14bb325SJeff Bonwick mutex_enter(&scl->scl_lock); 429e14bb325SJeff Bonwick if (rw == RW_READER) { 430e14bb325SJeff Bonwick while (scl->scl_writer || scl->scl_write_wanted) { 431e14bb325SJeff Bonwick cv_wait(&scl->scl_cv, &scl->scl_lock); 432e14bb325SJeff Bonwick } 433e14bb325SJeff Bonwick } else { 434e14bb325SJeff Bonwick ASSERT(scl->scl_writer != curthread); 435e14bb325SJeff Bonwick while (!refcount_is_zero(&scl->scl_count)) { 436e14bb325SJeff Bonwick scl->scl_write_wanted++; 437e14bb325SJeff Bonwick cv_wait(&scl->scl_cv, &scl->scl_lock); 438e14bb325SJeff Bonwick scl->scl_write_wanted--; 439e14bb325SJeff Bonwick } 440e14bb325SJeff Bonwick scl->scl_writer = curthread; 441e14bb325SJeff Bonwick } 442e14bb325SJeff Bonwick (void) refcount_add(&scl->scl_count, tag); 443e14bb325SJeff Bonwick mutex_exit(&scl->scl_lock); 444e05725b1Sbonwick } 445f64c0e34SEric Taylor ASSERT(wlocks_held <= locks); 446e05725b1Sbonwick } 447e05725b1Sbonwick 448e05725b1Sbonwick void 449e14bb325SJeff Bonwick spa_config_exit(spa_t *spa, int locks, void *tag) 450e05725b1Sbonwick { 451e14bb325SJeff Bonwick for (int i = SCL_LOCKS - 1; i >= 0; i--) { 452e14bb325SJeff Bonwick spa_config_lock_t *scl = &spa->spa_config_lock[i]; 453e14bb325SJeff Bonwick if (!(locks & (1 << i))) 454e14bb325SJeff Bonwick continue; 455e14bb325SJeff Bonwick mutex_enter(&scl->scl_lock); 456e14bb325SJeff Bonwick ASSERT(!refcount_is_zero(&scl->scl_count)); 457e14bb325SJeff Bonwick if (refcount_remove(&scl->scl_count, tag) == 0) { 458e14bb325SJeff Bonwick ASSERT(scl->scl_writer == NULL || 459e14bb325SJeff Bonwick scl->scl_writer == curthread); 460e14bb325SJeff Bonwick scl->scl_writer = NULL; /* OK in either case */ 461e14bb325SJeff Bonwick cv_broadcast(&scl->scl_cv); 462e14bb325SJeff Bonwick } 463e14bb325SJeff Bonwick mutex_exit(&scl->scl_lock); 464e05725b1Sbonwick } 465e05725b1Sbonwick } 466e05725b1Sbonwick 467e14bb325SJeff Bonwick int 468e14bb325SJeff Bonwick spa_config_held(spa_t *spa, int locks, krw_t rw) 469e05725b1Sbonwick { 470e14bb325SJeff Bonwick int locks_held = 0; 471e05725b1Sbonwick 472e14bb325SJeff Bonwick for (int i = 0; i < SCL_LOCKS; i++) { 473e14bb325SJeff Bonwick spa_config_lock_t *scl = &spa->spa_config_lock[i]; 474e14bb325SJeff Bonwick if (!(locks & (1 << i))) 475e14bb325SJeff Bonwick continue; 476e14bb325SJeff Bonwick if ((rw == RW_READER && !refcount_is_zero(&scl->scl_count)) || 477e14bb325SJeff Bonwick (rw == RW_WRITER && scl->scl_writer == curthread)) 478e14bb325SJeff Bonwick locks_held |= 1 << i; 479e14bb325SJeff Bonwick } 480e14bb325SJeff Bonwick 481e14bb325SJeff Bonwick return (locks_held); 482e05725b1Sbonwick } 483e05725b1Sbonwick 484fa9e4066Sahrens /* 485fa9e4066Sahrens * ========================================================================== 486fa9e4066Sahrens * SPA namespace functions 487fa9e4066Sahrens * ========================================================================== 488fa9e4066Sahrens */ 489fa9e4066Sahrens 490fa9e4066Sahrens /* 491fa9e4066Sahrens * Lookup the named spa_t in the AVL tree. The spa_namespace_lock must be held. 492fa9e4066Sahrens * Returns NULL if no matching spa_t is found. 493fa9e4066Sahrens */ 494fa9e4066Sahrens spa_t * 495fa9e4066Sahrens spa_lookup(const char *name) 496fa9e4066Sahrens { 497e14bb325SJeff Bonwick static spa_t search; /* spa_t is large; don't allocate on stack */ 498e14bb325SJeff Bonwick spa_t *spa; 499fa9e4066Sahrens avl_index_t where; 50040feaa91Sahrens char *cp; 501fa9e4066Sahrens 502fa9e4066Sahrens ASSERT(MUTEX_HELD(&spa_namespace_lock)); 503fa9e4066Sahrens 5043b2aab18SMatthew Ahrens (void) strlcpy(search.spa_name, name, sizeof (search.spa_name)); 5053b2aab18SMatthew Ahrens 50640feaa91Sahrens /* 50740feaa91Sahrens * If it's a full dataset name, figure out the pool name and 50840feaa91Sahrens * just use that. 50940feaa91Sahrens */ 51078f17100SMatthew Ahrens cp = strpbrk(search.spa_name, "/@#"); 5113b2aab18SMatthew Ahrens if (cp != NULL) 51240feaa91Sahrens *cp = '\0'; 51340feaa91Sahrens 514fa9e4066Sahrens spa = avl_find(&spa_namespace_avl, &search, &where); 515fa9e4066Sahrens 516fa9e4066Sahrens return (spa); 517fa9e4066Sahrens } 518fa9e4066Sahrens 519283b8460SGeorge.Wilson /* 520283b8460SGeorge.Wilson * Fires when spa_sync has not completed within zfs_deadman_synctime_ms. 521283b8460SGeorge.Wilson * If the zfs_deadman_enabled flag is set then it inspects all vdev queues 522283b8460SGeorge.Wilson * looking for potentially hung I/Os. 523283b8460SGeorge.Wilson */ 524283b8460SGeorge.Wilson void 525283b8460SGeorge.Wilson spa_deadman(void *arg) 526283b8460SGeorge.Wilson { 527283b8460SGeorge.Wilson spa_t *spa = arg; 528283b8460SGeorge.Wilson 5290713e232SGeorge Wilson /* 5300713e232SGeorge Wilson * Disable the deadman timer if the pool is suspended. 5310713e232SGeorge Wilson */ 5320713e232SGeorge Wilson if (spa_suspended(spa)) { 5330713e232SGeorge Wilson VERIFY(cyclic_reprogram(spa->spa_deadman_cycid, CY_INFINITY)); 5340713e232SGeorge Wilson return; 5350713e232SGeorge Wilson } 5360713e232SGeorge Wilson 537283b8460SGeorge.Wilson zfs_dbgmsg("slow spa_sync: started %llu seconds ago, calls %llu", 538283b8460SGeorge.Wilson (gethrtime() - spa->spa_sync_starttime) / NANOSEC, 539283b8460SGeorge.Wilson ++spa->spa_deadman_calls); 540283b8460SGeorge.Wilson if (zfs_deadman_enabled) 541283b8460SGeorge.Wilson vdev_deadman(spa->spa_root_vdev); 542283b8460SGeorge.Wilson } 543283b8460SGeorge.Wilson 544fa9e4066Sahrens /* 545fa9e4066Sahrens * Create an uninitialized spa_t with the given name. Requires 546fa9e4066Sahrens * spa_namespace_lock. The caller must ensure that the spa_t doesn't already 547fa9e4066Sahrens * exist by calling spa_lookup() first. 548fa9e4066Sahrens */ 549fa9e4066Sahrens spa_t * 550468c413aSTim Haley spa_add(const char *name, nvlist_t *config, const char *altroot) 551fa9e4066Sahrens { 552fa9e4066Sahrens spa_t *spa; 553c5904d13Seschrock spa_config_dirent_t *dp; 554283b8460SGeorge.Wilson cyc_handler_t hdlr; 555283b8460SGeorge.Wilson cyc_time_t when; 556fa9e4066Sahrens 557fa9e4066Sahrens ASSERT(MUTEX_HELD(&spa_namespace_lock)); 558fa9e4066Sahrens 559fa9e4066Sahrens spa = kmem_zalloc(sizeof (spa_t), KM_SLEEP); 560fa9e4066Sahrens 561c25056deSgw mutex_init(&spa->spa_async_lock, NULL, MUTEX_DEFAULT, NULL); 562c25056deSgw mutex_init(&spa->spa_errlist_lock, NULL, MUTEX_DEFAULT, NULL); 56335a5a358SJonathan Adams mutex_init(&spa->spa_errlog_lock, NULL, MUTEX_DEFAULT, NULL); 564bc9014e6SJustin Gibbs mutex_init(&spa->spa_evicting_os_lock, NULL, MUTEX_DEFAULT, NULL); 565c25056deSgw mutex_init(&spa->spa_history_lock, NULL, MUTEX_DEFAULT, NULL); 56635a5a358SJonathan Adams mutex_init(&spa->spa_proc_lock, NULL, MUTEX_DEFAULT, NULL); 567c25056deSgw mutex_init(&spa->spa_props_lock, NULL, MUTEX_DEFAULT, NULL); 56845818ee1SMatthew Ahrens mutex_init(&spa->spa_cksum_tmpls_lock, NULL, MUTEX_DEFAULT, NULL); 56935a5a358SJonathan Adams mutex_init(&spa->spa_scrub_lock, NULL, MUTEX_DEFAULT, NULL); 570a1521560SJeff Bonwick mutex_init(&spa->spa_suspend_lock, NULL, MUTEX_DEFAULT, NULL); 571a1521560SJeff Bonwick mutex_init(&spa->spa_vdev_top_lock, NULL, MUTEX_DEFAULT, NULL); 572c3a66015SMatthew Ahrens mutex_init(&spa->spa_iokstat_lock, NULL, MUTEX_DEFAULT, NULL); 5730f7643c7SGeorge Wilson mutex_init(&spa->spa_alloc_lock, NULL, MUTEX_DEFAULT, NULL); 574c25056deSgw 575c25056deSgw cv_init(&spa->spa_async_cv, NULL, CV_DEFAULT, NULL); 576bc9014e6SJustin Gibbs cv_init(&spa->spa_evicting_os_cv, NULL, CV_DEFAULT, NULL); 57735a5a358SJonathan Adams cv_init(&spa->spa_proc_cv, NULL, CV_DEFAULT, NULL); 578c25056deSgw cv_init(&spa->spa_scrub_io_cv, NULL, CV_DEFAULT, NULL); 579e14bb325SJeff Bonwick cv_init(&spa->spa_suspend_cv, NULL, CV_DEFAULT, NULL); 580c25056deSgw 581b24ab676SJeff Bonwick for (int t = 0; t < TXG_SIZE; t++) 582cde58dbcSMatthew Ahrens bplist_create(&spa->spa_free_bplist[t]); 583b24ab676SJeff Bonwick 584e14bb325SJeff Bonwick (void) strlcpy(spa->spa_name, name, sizeof (spa->spa_name)); 585fa9e4066Sahrens spa->spa_state = POOL_STATE_UNINITIALIZED; 586fa9e4066Sahrens spa->spa_freeze_txg = UINT64_MAX; 5870373e76bSbonwick spa->spa_final_txg = UINT64_MAX; 588468c413aSTim Haley spa->spa_load_max_txg = UINT64_MAX; 58935a5a358SJonathan Adams spa->spa_proc = &p0; 59035a5a358SJonathan Adams spa->spa_proc_state = SPA_PROC_NONE; 591fa9e4066Sahrens 592283b8460SGeorge.Wilson hdlr.cyh_func = spa_deadman; 593283b8460SGeorge.Wilson hdlr.cyh_arg = spa; 594283b8460SGeorge.Wilson hdlr.cyh_level = CY_LOW_LEVEL; 595283b8460SGeorge.Wilson 59669962b56SMatthew Ahrens spa->spa_deadman_synctime = MSEC2NSEC(zfs_deadman_synctime_ms); 597283b8460SGeorge.Wilson 598283b8460SGeorge.Wilson /* 599283b8460SGeorge.Wilson * This determines how often we need to check for hung I/Os after 600283b8460SGeorge.Wilson * the cyclic has already fired. Since checking for hung I/Os is 601283b8460SGeorge.Wilson * an expensive operation we don't want to check too frequently. 60269962b56SMatthew Ahrens * Instead wait for 5 seconds before checking again. 603283b8460SGeorge.Wilson */ 60469962b56SMatthew Ahrens when.cyt_interval = MSEC2NSEC(zfs_deadman_checktime_ms); 605283b8460SGeorge.Wilson when.cyt_when = CY_INFINITY; 606283b8460SGeorge.Wilson mutex_enter(&cpu_lock); 607283b8460SGeorge.Wilson spa->spa_deadman_cycid = cyclic_add(&hdlr, &when); 608283b8460SGeorge.Wilson mutex_exit(&cpu_lock); 609283b8460SGeorge.Wilson 610fa9e4066Sahrens refcount_create(&spa->spa_refcount); 611e14bb325SJeff Bonwick spa_config_lock_init(spa); 612fa9e4066Sahrens 613fa9e4066Sahrens avl_add(&spa_namespace_avl, spa); 614fa9e4066Sahrens 6150373e76bSbonwick /* 6160373e76bSbonwick * Set the alternate root, if there is one. 6170373e76bSbonwick */ 6180373e76bSbonwick if (altroot) { 6190373e76bSbonwick spa->spa_root = spa_strdup(altroot); 6200373e76bSbonwick spa_active_count++; 6210373e76bSbonwick } 6220373e76bSbonwick 623*94c2d0ebSMatthew Ahrens avl_create(&spa->spa_alloc_tree, zio_bookmark_compare, 6240f7643c7SGeorge Wilson sizeof (zio_t), offsetof(zio_t, io_alloc_node)); 6250f7643c7SGeorge Wilson 626c5904d13Seschrock /* 627c5904d13Seschrock * Every pool starts with the default cachefile 628c5904d13Seschrock */ 629c5904d13Seschrock list_create(&spa->spa_config_list, sizeof (spa_config_dirent_t), 630c5904d13Seschrock offsetof(spa_config_dirent_t, scd_link)); 631c5904d13Seschrock 632c5904d13Seschrock dp = kmem_zalloc(sizeof (spa_config_dirent_t), KM_SLEEP); 633ef912c80STim Haley dp->scd_path = altroot ? NULL : spa_strdup(spa_config_path); 634c5904d13Seschrock list_insert_head(&spa->spa_config_list, dp); 635c5904d13Seschrock 6364b964adaSGeorge Wilson VERIFY(nvlist_alloc(&spa->spa_load_info, NV_UNIQUE_NAME, 6374b964adaSGeorge Wilson KM_SLEEP) == 0); 6384b964adaSGeorge Wilson 639ad135b5dSChristopher Siden if (config != NULL) { 640ad135b5dSChristopher Siden nvlist_t *features; 641ad135b5dSChristopher Siden 642ad135b5dSChristopher Siden if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_FEATURES_FOR_READ, 643ad135b5dSChristopher Siden &features) == 0) { 644ad135b5dSChristopher Siden VERIFY(nvlist_dup(features, &spa->spa_label_features, 645ad135b5dSChristopher Siden 0) == 0); 646ad135b5dSChristopher Siden } 647ad135b5dSChristopher Siden 648468c413aSTim Haley VERIFY(nvlist_dup(config, &spa->spa_config, 0) == 0); 649ad135b5dSChristopher Siden } 650ad135b5dSChristopher Siden 651ad135b5dSChristopher Siden if (spa->spa_label_features == NULL) { 652ad135b5dSChristopher Siden VERIFY(nvlist_alloc(&spa->spa_label_features, NV_UNIQUE_NAME, 653ad135b5dSChristopher Siden KM_SLEEP) == 0); 654ad135b5dSChristopher Siden } 655468c413aSTim Haley 656c3a66015SMatthew Ahrens spa->spa_iokstat = kstat_create("zfs", 0, name, 657c3a66015SMatthew Ahrens "disk", KSTAT_TYPE_IO, 1, 0); 658c3a66015SMatthew Ahrens if (spa->spa_iokstat) { 659c3a66015SMatthew Ahrens spa->spa_iokstat->ks_lock = &spa->spa_iokstat_lock; 660c3a66015SMatthew Ahrens kstat_install(spa->spa_iokstat); 661c3a66015SMatthew Ahrens } 662c3a66015SMatthew Ahrens 6633b2aab18SMatthew Ahrens spa->spa_debug = ((zfs_flags & ZFS_DEBUG_SPA) != 0); 6643b2aab18SMatthew Ahrens 66581cd5c55SMatthew Ahrens spa->spa_min_ashift = INT_MAX; 66681cd5c55SMatthew Ahrens spa->spa_max_ashift = 0; 66781cd5c55SMatthew Ahrens 66843466aaeSMax Grossman /* 66943466aaeSMax Grossman * As a pool is being created, treat all features as disabled by 67043466aaeSMax Grossman * setting SPA_FEATURE_DISABLED for all entries in the feature 67143466aaeSMax Grossman * refcount cache. 67243466aaeSMax Grossman */ 67343466aaeSMax Grossman for (int i = 0; i < SPA_FEATURES; i++) { 67443466aaeSMax Grossman spa->spa_feat_refcount_cache[i] = SPA_FEATURE_DISABLED; 67543466aaeSMax Grossman } 67643466aaeSMax Grossman 677fa9e4066Sahrens return (spa); 678fa9e4066Sahrens } 679fa9e4066Sahrens 680fa9e4066Sahrens /* 681fa9e4066Sahrens * Removes a spa_t from the namespace, freeing up any memory used. Requires 682fa9e4066Sahrens * spa_namespace_lock. This is called only after the spa_t has been closed and 683fa9e4066Sahrens * deactivated. 684fa9e4066Sahrens */ 685fa9e4066Sahrens void 686fa9e4066Sahrens spa_remove(spa_t *spa) 687fa9e4066Sahrens { 688c5904d13Seschrock spa_config_dirent_t *dp; 689c5904d13Seschrock 690fa9e4066Sahrens ASSERT(MUTEX_HELD(&spa_namespace_lock)); 691fa9e4066Sahrens ASSERT(spa->spa_state == POOL_STATE_UNINITIALIZED); 692bc9014e6SJustin Gibbs ASSERT3U(refcount_count(&spa->spa_refcount), ==, 0); 693fa9e4066Sahrens 6941195e687SMark J Musante nvlist_free(spa->spa_config_splitting); 6951195e687SMark J Musante 696fa9e4066Sahrens avl_remove(&spa_namespace_avl, spa); 697fa9e4066Sahrens cv_broadcast(&spa_namespace_cv); 698fa9e4066Sahrens 6990373e76bSbonwick if (spa->spa_root) { 700fa9e4066Sahrens spa_strfree(spa->spa_root); 7010373e76bSbonwick spa_active_count--; 7020373e76bSbonwick } 703fa9e4066Sahrens 704c5904d13Seschrock while ((dp = list_head(&spa->spa_config_list)) != NULL) { 705c5904d13Seschrock list_remove(&spa->spa_config_list, dp); 706c5904d13Seschrock if (dp->scd_path != NULL) 707c5904d13Seschrock spa_strfree(dp->scd_path); 708c5904d13Seschrock kmem_free(dp, sizeof (spa_config_dirent_t)); 709c5904d13Seschrock } 710c5904d13Seschrock 7110f7643c7SGeorge Wilson avl_destroy(&spa->spa_alloc_tree); 712c5904d13Seschrock list_destroy(&spa->spa_config_list); 7132f8aaab3Seschrock 714ad135b5dSChristopher Siden nvlist_free(spa->spa_label_features); 7154b964adaSGeorge Wilson nvlist_free(spa->spa_load_info); 716fa9e4066Sahrens spa_config_set(spa, NULL); 717fa9e4066Sahrens 718283b8460SGeorge.Wilson mutex_enter(&cpu_lock); 719283b8460SGeorge.Wilson if (spa->spa_deadman_cycid != CYCLIC_NONE) 720283b8460SGeorge.Wilson cyclic_remove(spa->spa_deadman_cycid); 721283b8460SGeorge.Wilson mutex_exit(&cpu_lock); 722283b8460SGeorge.Wilson spa->spa_deadman_cycid = CYCLIC_NONE; 723283b8460SGeorge.Wilson 724fa9e4066Sahrens refcount_destroy(&spa->spa_refcount); 72591ebeef5Sahrens 726e14bb325SJeff Bonwick spa_config_lock_destroy(spa); 727fa9e4066Sahrens 728c3a66015SMatthew Ahrens kstat_delete(spa->spa_iokstat); 729c3a66015SMatthew Ahrens spa->spa_iokstat = NULL; 730c3a66015SMatthew Ahrens 731b24ab676SJeff Bonwick for (int t = 0; t < TXG_SIZE; t++) 732cde58dbcSMatthew Ahrens bplist_destroy(&spa->spa_free_bplist[t]); 733b24ab676SJeff Bonwick 73445818ee1SMatthew Ahrens zio_checksum_templates_free(spa); 73545818ee1SMatthew Ahrens 736c25056deSgw cv_destroy(&spa->spa_async_cv); 737bc9014e6SJustin Gibbs cv_destroy(&spa->spa_evicting_os_cv); 73835a5a358SJonathan Adams cv_destroy(&spa->spa_proc_cv); 739c25056deSgw cv_destroy(&spa->spa_scrub_io_cv); 740e14bb325SJeff Bonwick cv_destroy(&spa->spa_suspend_cv); 741c25056deSgw 7420f7643c7SGeorge Wilson mutex_destroy(&spa->spa_alloc_lock); 7435ad82045Snd mutex_destroy(&spa->spa_async_lock); 744c25056deSgw mutex_destroy(&spa->spa_errlist_lock); 74535a5a358SJonathan Adams mutex_destroy(&spa->spa_errlog_lock); 746bc9014e6SJustin Gibbs mutex_destroy(&spa->spa_evicting_os_lock); 74706eeb2adSek mutex_destroy(&spa->spa_history_lock); 74835a5a358SJonathan Adams mutex_destroy(&spa->spa_proc_lock); 749b1b8ab34Slling mutex_destroy(&spa->spa_props_lock); 75045818ee1SMatthew Ahrens mutex_destroy(&spa->spa_cksum_tmpls_lock); 75135a5a358SJonathan Adams mutex_destroy(&spa->spa_scrub_lock); 752e14bb325SJeff Bonwick mutex_destroy(&spa->spa_suspend_lock); 753a1521560SJeff Bonwick mutex_destroy(&spa->spa_vdev_top_lock); 754c3a66015SMatthew Ahrens mutex_destroy(&spa->spa_iokstat_lock); 7555ad82045Snd 756fa9e4066Sahrens kmem_free(spa, sizeof (spa_t)); 757fa9e4066Sahrens } 758fa9e4066Sahrens 759fa9e4066Sahrens /* 760fa9e4066Sahrens * Given a pool, return the next pool in the namespace, or NULL if there is 761fa9e4066Sahrens * none. If 'prev' is NULL, return the first pool. 762fa9e4066Sahrens */ 763fa9e4066Sahrens spa_t * 764fa9e4066Sahrens spa_next(spa_t *prev) 765fa9e4066Sahrens { 766fa9e4066Sahrens ASSERT(MUTEX_HELD(&spa_namespace_lock)); 767fa9e4066Sahrens 768fa9e4066Sahrens if (prev) 769fa9e4066Sahrens return (AVL_NEXT(&spa_namespace_avl, prev)); 770fa9e4066Sahrens else 771fa9e4066Sahrens return (avl_first(&spa_namespace_avl)); 772fa9e4066Sahrens } 773fa9e4066Sahrens 774fa9e4066Sahrens /* 775fa9e4066Sahrens * ========================================================================== 776fa9e4066Sahrens * SPA refcount functions 777fa9e4066Sahrens * ========================================================================== 778fa9e4066Sahrens */ 779fa9e4066Sahrens 780fa9e4066Sahrens /* 781fa9e4066Sahrens * Add a reference to the given spa_t. Must have at least one reference, or 782fa9e4066Sahrens * have the namespace lock held. 783fa9e4066Sahrens */ 784fa9e4066Sahrens void 785fa9e4066Sahrens spa_open_ref(spa_t *spa, void *tag) 786fa9e4066Sahrens { 787088f3894Sahrens ASSERT(refcount_count(&spa->spa_refcount) >= spa->spa_minref || 788fa9e4066Sahrens MUTEX_HELD(&spa_namespace_lock)); 789fa9e4066Sahrens (void) refcount_add(&spa->spa_refcount, tag); 790fa9e4066Sahrens } 791fa9e4066Sahrens 792fa9e4066Sahrens /* 793fa9e4066Sahrens * Remove a reference to the given spa_t. Must have at least one reference, or 794fa9e4066Sahrens * have the namespace lock held. 795fa9e4066Sahrens */ 796fa9e4066Sahrens void 797fa9e4066Sahrens spa_close(spa_t *spa, void *tag) 798fa9e4066Sahrens { 799088f3894Sahrens ASSERT(refcount_count(&spa->spa_refcount) > spa->spa_minref || 800fa9e4066Sahrens MUTEX_HELD(&spa_namespace_lock)); 801fa9e4066Sahrens (void) refcount_remove(&spa->spa_refcount, tag); 802fa9e4066Sahrens } 803fa9e4066Sahrens 804bc9014e6SJustin Gibbs /* 805bc9014e6SJustin Gibbs * Remove a reference to the given spa_t held by a dsl dir that is 806bc9014e6SJustin Gibbs * being asynchronously released. Async releases occur from a taskq 807bc9014e6SJustin Gibbs * performing eviction of dsl datasets and dirs. The namespace lock 808bc9014e6SJustin Gibbs * isn't held and the hold by the object being evicted may contribute to 809bc9014e6SJustin Gibbs * spa_minref (e.g. dataset or directory released during pool export), 810bc9014e6SJustin Gibbs * so the asserts in spa_close() do not apply. 811bc9014e6SJustin Gibbs */ 812bc9014e6SJustin Gibbs void 813bc9014e6SJustin Gibbs spa_async_close(spa_t *spa, void *tag) 814bc9014e6SJustin Gibbs { 815bc9014e6SJustin Gibbs (void) refcount_remove(&spa->spa_refcount, tag); 816bc9014e6SJustin Gibbs } 817bc9014e6SJustin Gibbs 818fa9e4066Sahrens /* 819fa9e4066Sahrens * Check to see if the spa refcount is zero. Must be called with 820088f3894Sahrens * spa_namespace_lock held. We really compare against spa_minref, which is the 821fa9e4066Sahrens * number of references acquired when opening a pool 822fa9e4066Sahrens */ 823fa9e4066Sahrens boolean_t 824fa9e4066Sahrens spa_refcount_zero(spa_t *spa) 825fa9e4066Sahrens { 826fa9e4066Sahrens ASSERT(MUTEX_HELD(&spa_namespace_lock)); 827fa9e4066Sahrens 828088f3894Sahrens return (refcount_count(&spa->spa_refcount) == spa->spa_minref); 829fa9e4066Sahrens } 830fa9e4066Sahrens 83199653d4eSeschrock /* 83299653d4eSeschrock * ========================================================================== 833fa94a07fSbrendan * SPA spare and l2cache tracking 83499653d4eSeschrock * ========================================================================== 83599653d4eSeschrock */ 83699653d4eSeschrock 837fa94a07fSbrendan /* 838fa94a07fSbrendan * Hot spares and cache devices are tracked using the same code below, 839fa94a07fSbrendan * for 'auxiliary' devices. 840fa94a07fSbrendan */ 841fa94a07fSbrendan 842fa94a07fSbrendan typedef struct spa_aux { 843fa94a07fSbrendan uint64_t aux_guid; 844fa94a07fSbrendan uint64_t aux_pool; 845fa94a07fSbrendan avl_node_t aux_avl; 846fa94a07fSbrendan int aux_count; 847fa94a07fSbrendan } spa_aux_t; 848fa94a07fSbrendan 849fa94a07fSbrendan static int 850fa94a07fSbrendan spa_aux_compare(const void *a, const void *b) 851fa94a07fSbrendan { 852fa94a07fSbrendan const spa_aux_t *sa = a; 853fa94a07fSbrendan const spa_aux_t *sb = b; 854fa94a07fSbrendan 855fa94a07fSbrendan if (sa->aux_guid < sb->aux_guid) 856fa94a07fSbrendan return (-1); 857fa94a07fSbrendan else if (sa->aux_guid > sb->aux_guid) 858fa94a07fSbrendan return (1); 859fa94a07fSbrendan else 860fa94a07fSbrendan return (0); 861fa94a07fSbrendan } 862fa94a07fSbrendan 863fa94a07fSbrendan void 864fa94a07fSbrendan spa_aux_add(vdev_t *vd, avl_tree_t *avl) 865fa94a07fSbrendan { 866fa94a07fSbrendan avl_index_t where; 867fa94a07fSbrendan spa_aux_t search; 868fa94a07fSbrendan spa_aux_t *aux; 869fa94a07fSbrendan 870fa94a07fSbrendan search.aux_guid = vd->vdev_guid; 871fa94a07fSbrendan if ((aux = avl_find(avl, &search, &where)) != NULL) { 872fa94a07fSbrendan aux->aux_count++; 873fa94a07fSbrendan } else { 874fa94a07fSbrendan aux = kmem_zalloc(sizeof (spa_aux_t), KM_SLEEP); 875fa94a07fSbrendan aux->aux_guid = vd->vdev_guid; 876fa94a07fSbrendan aux->aux_count = 1; 877fa94a07fSbrendan avl_insert(avl, aux, where); 878fa94a07fSbrendan } 879fa94a07fSbrendan } 880fa94a07fSbrendan 881fa94a07fSbrendan void 882fa94a07fSbrendan spa_aux_remove(vdev_t *vd, avl_tree_t *avl) 883fa94a07fSbrendan { 884fa94a07fSbrendan spa_aux_t search; 885fa94a07fSbrendan spa_aux_t *aux; 886fa94a07fSbrendan avl_index_t where; 887fa94a07fSbrendan 888fa94a07fSbrendan search.aux_guid = vd->vdev_guid; 889fa94a07fSbrendan aux = avl_find(avl, &search, &where); 890fa94a07fSbrendan 891fa94a07fSbrendan ASSERT(aux != NULL); 892fa94a07fSbrendan 893fa94a07fSbrendan if (--aux->aux_count == 0) { 894fa94a07fSbrendan avl_remove(avl, aux); 895fa94a07fSbrendan kmem_free(aux, sizeof (spa_aux_t)); 896fa94a07fSbrendan } else if (aux->aux_pool == spa_guid(vd->vdev_spa)) { 897fa94a07fSbrendan aux->aux_pool = 0ULL; 898fa94a07fSbrendan } 899fa94a07fSbrendan } 900fa94a07fSbrendan 901fa94a07fSbrendan boolean_t 90289a89ebfSlling spa_aux_exists(uint64_t guid, uint64_t *pool, int *refcnt, avl_tree_t *avl) 903fa94a07fSbrendan { 904fa94a07fSbrendan spa_aux_t search, *found; 905fa94a07fSbrendan 906fa94a07fSbrendan search.aux_guid = guid; 90789a89ebfSlling found = avl_find(avl, &search, NULL); 908fa94a07fSbrendan 909fa94a07fSbrendan if (pool) { 910fa94a07fSbrendan if (found) 911fa94a07fSbrendan *pool = found->aux_pool; 912fa94a07fSbrendan else 913fa94a07fSbrendan *pool = 0ULL; 914fa94a07fSbrendan } 915fa94a07fSbrendan 91689a89ebfSlling if (refcnt) { 91789a89ebfSlling if (found) 91889a89ebfSlling *refcnt = found->aux_count; 91989a89ebfSlling else 92089a89ebfSlling *refcnt = 0; 92189a89ebfSlling } 92289a89ebfSlling 923fa94a07fSbrendan return (found != NULL); 924fa94a07fSbrendan } 925fa94a07fSbrendan 926fa94a07fSbrendan void 927fa94a07fSbrendan spa_aux_activate(vdev_t *vd, avl_tree_t *avl) 928fa94a07fSbrendan { 929fa94a07fSbrendan spa_aux_t search, *found; 930fa94a07fSbrendan avl_index_t where; 931fa94a07fSbrendan 932fa94a07fSbrendan search.aux_guid = vd->vdev_guid; 933fa94a07fSbrendan found = avl_find(avl, &search, &where); 934fa94a07fSbrendan ASSERT(found != NULL); 935fa94a07fSbrendan ASSERT(found->aux_pool == 0ULL); 936fa94a07fSbrendan 937fa94a07fSbrendan found->aux_pool = spa_guid(vd->vdev_spa); 938fa94a07fSbrendan } 939fa94a07fSbrendan 94099653d4eSeschrock /* 94139c23413Seschrock * Spares are tracked globally due to the following constraints: 94239c23413Seschrock * 94339c23413Seschrock * - A spare may be part of multiple pools. 94439c23413Seschrock * - A spare may be added to a pool even if it's actively in use within 94539c23413Seschrock * another pool. 94639c23413Seschrock * - A spare in use in any pool can only be the source of a replacement if 94739c23413Seschrock * the target is a spare in the same pool. 94839c23413Seschrock * 94939c23413Seschrock * We keep track of all spares on the system through the use of a reference 95039c23413Seschrock * counted AVL tree. When a vdev is added as a spare, or used as a replacement 95139c23413Seschrock * spare, then we bump the reference count in the AVL tree. In addition, we set 95239c23413Seschrock * the 'vdev_isspare' member to indicate that the device is a spare (active or 95339c23413Seschrock * inactive). When a spare is made active (used to replace a device in the 95439c23413Seschrock * pool), we also keep track of which pool its been made a part of. 95539c23413Seschrock * 95639c23413Seschrock * The 'spa_spare_lock' protects the AVL tree. These functions are normally 95739c23413Seschrock * called under the spa_namespace lock as part of vdev reconfiguration. The 95839c23413Seschrock * separate spare lock exists for the status query path, which does not need to 95939c23413Seschrock * be completely consistent with respect to other vdev configuration changes. 96099653d4eSeschrock */ 96139c23413Seschrock 96299653d4eSeschrock static int 96399653d4eSeschrock spa_spare_compare(const void *a, const void *b) 96499653d4eSeschrock { 965fa94a07fSbrendan return (spa_aux_compare(a, b)); 96699653d4eSeschrock } 96799653d4eSeschrock 96899653d4eSeschrock void 96939c23413Seschrock spa_spare_add(vdev_t *vd) 97099653d4eSeschrock { 97199653d4eSeschrock mutex_enter(&spa_spare_lock); 97239c23413Seschrock ASSERT(!vd->vdev_isspare); 973fa94a07fSbrendan spa_aux_add(vd, &spa_spare_avl); 97439c23413Seschrock vd->vdev_isspare = B_TRUE; 97599653d4eSeschrock mutex_exit(&spa_spare_lock); 97699653d4eSeschrock } 97799653d4eSeschrock 97899653d4eSeschrock void 97939c23413Seschrock spa_spare_remove(vdev_t *vd) 98099653d4eSeschrock { 98199653d4eSeschrock mutex_enter(&spa_spare_lock); 98239c23413Seschrock ASSERT(vd->vdev_isspare); 983fa94a07fSbrendan spa_aux_remove(vd, &spa_spare_avl); 98439c23413Seschrock vd->vdev_isspare = B_FALSE; 98599653d4eSeschrock mutex_exit(&spa_spare_lock); 98699653d4eSeschrock } 98799653d4eSeschrock 98899653d4eSeschrock boolean_t 98989a89ebfSlling spa_spare_exists(uint64_t guid, uint64_t *pool, int *refcnt) 99099653d4eSeschrock { 991fa94a07fSbrendan boolean_t found; 99299653d4eSeschrock 99399653d4eSeschrock mutex_enter(&spa_spare_lock); 99489a89ebfSlling found = spa_aux_exists(guid, pool, refcnt, &spa_spare_avl); 99599653d4eSeschrock mutex_exit(&spa_spare_lock); 99699653d4eSeschrock 997fa94a07fSbrendan return (found); 99839c23413Seschrock } 99939c23413Seschrock 100039c23413Seschrock void 100139c23413Seschrock spa_spare_activate(vdev_t *vd) 100239c23413Seschrock { 100339c23413Seschrock mutex_enter(&spa_spare_lock); 100439c23413Seschrock ASSERT(vd->vdev_isspare); 1005fa94a07fSbrendan spa_aux_activate(vd, &spa_spare_avl); 1006fa94a07fSbrendan mutex_exit(&spa_spare_lock); 1007fa94a07fSbrendan } 100839c23413Seschrock 1009fa94a07fSbrendan /* 1010fa94a07fSbrendan * Level 2 ARC devices are tracked globally for the same reasons as spares. 1011fa94a07fSbrendan * Cache devices currently only support one pool per cache device, and so 1012fa94a07fSbrendan * for these devices the aux reference count is currently unused beyond 1. 1013fa94a07fSbrendan */ 101439c23413Seschrock 1015fa94a07fSbrendan static int 1016fa94a07fSbrendan spa_l2cache_compare(const void *a, const void *b) 1017fa94a07fSbrendan { 1018fa94a07fSbrendan return (spa_aux_compare(a, b)); 1019fa94a07fSbrendan } 1020fa94a07fSbrendan 1021fa94a07fSbrendan void 1022fa94a07fSbrendan spa_l2cache_add(vdev_t *vd) 1023fa94a07fSbrendan { 1024fa94a07fSbrendan mutex_enter(&spa_l2cache_lock); 1025fa94a07fSbrendan ASSERT(!vd->vdev_isl2cache); 1026fa94a07fSbrendan spa_aux_add(vd, &spa_l2cache_avl); 1027fa94a07fSbrendan vd->vdev_isl2cache = B_TRUE; 1028fa94a07fSbrendan mutex_exit(&spa_l2cache_lock); 1029fa94a07fSbrendan } 1030fa94a07fSbrendan 1031fa94a07fSbrendan void 1032fa94a07fSbrendan spa_l2cache_remove(vdev_t *vd) 1033fa94a07fSbrendan { 1034fa94a07fSbrendan mutex_enter(&spa_l2cache_lock); 1035fa94a07fSbrendan ASSERT(vd->vdev_isl2cache); 1036fa94a07fSbrendan spa_aux_remove(vd, &spa_l2cache_avl); 1037fa94a07fSbrendan vd->vdev_isl2cache = B_FALSE; 1038fa94a07fSbrendan mutex_exit(&spa_l2cache_lock); 1039fa94a07fSbrendan } 1040fa94a07fSbrendan 1041fa94a07fSbrendan boolean_t 1042fa94a07fSbrendan spa_l2cache_exists(uint64_t guid, uint64_t *pool) 1043fa94a07fSbrendan { 1044fa94a07fSbrendan boolean_t found; 1045fa94a07fSbrendan 1046fa94a07fSbrendan mutex_enter(&spa_l2cache_lock); 104789a89ebfSlling found = spa_aux_exists(guid, pool, NULL, &spa_l2cache_avl); 1048fa94a07fSbrendan mutex_exit(&spa_l2cache_lock); 1049fa94a07fSbrendan 1050fa94a07fSbrendan return (found); 1051fa94a07fSbrendan } 1052fa94a07fSbrendan 1053fa94a07fSbrendan void 1054fa94a07fSbrendan spa_l2cache_activate(vdev_t *vd) 1055fa94a07fSbrendan { 1056fa94a07fSbrendan mutex_enter(&spa_l2cache_lock); 1057fa94a07fSbrendan ASSERT(vd->vdev_isl2cache); 1058fa94a07fSbrendan spa_aux_activate(vd, &spa_l2cache_avl); 1059fa94a07fSbrendan mutex_exit(&spa_l2cache_lock); 1060fa94a07fSbrendan } 1061fa94a07fSbrendan 1062fa9e4066Sahrens /* 1063fa9e4066Sahrens * ========================================================================== 1064fa9e4066Sahrens * SPA vdev locking 1065fa9e4066Sahrens * ========================================================================== 1066fa9e4066Sahrens */ 1067fa9e4066Sahrens 1068fa9e4066Sahrens /* 1069ea8dc4b6Seschrock * Lock the given spa_t for the purpose of adding or removing a vdev. 1070ea8dc4b6Seschrock * Grabs the global spa_namespace_lock plus the spa config lock for writing. 1071fa9e4066Sahrens * It returns the next transaction group for the spa_t. 1072fa9e4066Sahrens */ 1073fa9e4066Sahrens uint64_t 1074fa9e4066Sahrens spa_vdev_enter(spa_t *spa) 1075fa9e4066Sahrens { 1076a1521560SJeff Bonwick mutex_enter(&spa->spa_vdev_top_lock); 1077bbfd46c4SJeff Bonwick mutex_enter(&spa_namespace_lock); 107888ecc943SGeorge Wilson return (spa_vdev_config_enter(spa)); 107988ecc943SGeorge Wilson } 108088ecc943SGeorge Wilson 108188ecc943SGeorge Wilson /* 108288ecc943SGeorge Wilson * Internal implementation for spa_vdev_enter(). Used when a vdev 108388ecc943SGeorge Wilson * operation requires multiple syncs (i.e. removing a device) while 108488ecc943SGeorge Wilson * keeping the spa_namespace_lock held. 108588ecc943SGeorge Wilson */ 108688ecc943SGeorge Wilson uint64_t 108788ecc943SGeorge Wilson spa_vdev_config_enter(spa_t *spa) 108888ecc943SGeorge Wilson { 108988ecc943SGeorge Wilson ASSERT(MUTEX_HELD(&spa_namespace_lock)); 10903d7072f8Seschrock 1091e14bb325SJeff Bonwick spa_config_enter(spa, SCL_ALL, spa, RW_WRITER); 1092fa9e4066Sahrens 1093fa9e4066Sahrens return (spa_last_synced_txg(spa) + 1); 1094fa9e4066Sahrens } 1095fa9e4066Sahrens 1096fa9e4066Sahrens /* 109788ecc943SGeorge Wilson * Used in combination with spa_vdev_config_enter() to allow the syncing 109888ecc943SGeorge Wilson * of multiple transactions without releasing the spa_namespace_lock. 1099fa9e4066Sahrens */ 110088ecc943SGeorge Wilson void 110188ecc943SGeorge Wilson spa_vdev_config_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error, char *tag) 1102fa9e4066Sahrens { 110388ecc943SGeorge Wilson ASSERT(MUTEX_HELD(&spa_namespace_lock)); 110488ecc943SGeorge Wilson 11050e34b6a7Sbonwick int config_changed = B_FALSE; 1106ea8dc4b6Seschrock 11070373e76bSbonwick ASSERT(txg > spa_last_synced_txg(spa)); 11080e34b6a7Sbonwick 1109e14bb325SJeff Bonwick spa->spa_pending_vdev = NULL; 1110e14bb325SJeff Bonwick 11110e34b6a7Sbonwick /* 11120e34b6a7Sbonwick * Reassess the DTLs. 11130e34b6a7Sbonwick */ 11140373e76bSbonwick vdev_dtl_reassess(spa->spa_root_vdev, 0, 0, B_FALSE); 11150e34b6a7Sbonwick 1116e14bb325SJeff Bonwick if (error == 0 && !list_is_empty(&spa->spa_config_dirty_list)) { 11170e34b6a7Sbonwick config_changed = B_TRUE; 11188f18d1faSGeorge Wilson spa->spa_config_generation++; 11190e34b6a7Sbonwick } 1120ea8dc4b6Seschrock 112188ecc943SGeorge Wilson /* 112288ecc943SGeorge Wilson * Verify the metaslab classes. 112388ecc943SGeorge Wilson */ 1124b24ab676SJeff Bonwick ASSERT(metaslab_class_validate(spa_normal_class(spa)) == 0); 1125b24ab676SJeff Bonwick ASSERT(metaslab_class_validate(spa_log_class(spa)) == 0); 112688ecc943SGeorge Wilson 1127e14bb325SJeff Bonwick spa_config_exit(spa, SCL_ALL, spa); 1128fa9e4066Sahrens 112988ecc943SGeorge Wilson /* 113088ecc943SGeorge Wilson * Panic the system if the specified tag requires it. This 113188ecc943SGeorge Wilson * is useful for ensuring that configurations are updated 113288ecc943SGeorge Wilson * transactionally. 113388ecc943SGeorge Wilson */ 113488ecc943SGeorge Wilson if (zio_injection_enabled) 11351195e687SMark J Musante zio_handle_panic_injection(spa, tag, 0); 113688ecc943SGeorge Wilson 1137fa9e4066Sahrens /* 1138fa9e4066Sahrens * Note: this txg_wait_synced() is important because it ensures 1139fa9e4066Sahrens * that there won't be more than one config change per txg. 1140fa9e4066Sahrens * This allows us to use the txg as the generation number. 1141fa9e4066Sahrens */ 1142fa9e4066Sahrens if (error == 0) 1143fa9e4066Sahrens txg_wait_synced(spa->spa_dsl_pool, txg); 1144fa9e4066Sahrens 1145fa9e4066Sahrens if (vd != NULL) { 11460713e232SGeorge Wilson ASSERT(!vd->vdev_detached || vd->vdev_dtl_sm == NULL); 11478ad4d6ddSJeff Bonwick spa_config_enter(spa, SCL_ALL, spa, RW_WRITER); 1148fa9e4066Sahrens vdev_free(vd); 11498ad4d6ddSJeff Bonwick spa_config_exit(spa, SCL_ALL, spa); 1150fa9e4066Sahrens } 1151fa9e4066Sahrens 1152fa9e4066Sahrens /* 11530e34b6a7Sbonwick * If the config changed, update the config cache. 1154fa9e4066Sahrens */ 11550e34b6a7Sbonwick if (config_changed) 1156c5904d13Seschrock spa_config_sync(spa, B_FALSE, B_TRUE); 115788ecc943SGeorge Wilson } 1158ea8dc4b6Seschrock 115988ecc943SGeorge Wilson /* 116088ecc943SGeorge Wilson * Unlock the spa_t after adding or removing a vdev. Besides undoing the 116188ecc943SGeorge Wilson * locking of spa_vdev_enter(), we also want make sure the transactions have 116288ecc943SGeorge Wilson * synced to disk, and then update the global configuration cache with the new 116388ecc943SGeorge Wilson * information. 116488ecc943SGeorge Wilson */ 116588ecc943SGeorge Wilson int 116688ecc943SGeorge Wilson spa_vdev_exit(spa_t *spa, vdev_t *vd, uint64_t txg, int error) 116788ecc943SGeorge Wilson { 116888ecc943SGeorge Wilson spa_vdev_config_exit(spa, vd, txg, error, FTAG); 1169ea8dc4b6Seschrock mutex_exit(&spa_namespace_lock); 1170bbfd46c4SJeff Bonwick mutex_exit(&spa->spa_vdev_top_lock); 1171fa9e4066Sahrens 1172fa9e4066Sahrens return (error); 1173fa9e4066Sahrens } 1174fa9e4066Sahrens 1175e14bb325SJeff Bonwick /* 1176e14bb325SJeff Bonwick * Lock the given spa_t for the purpose of changing vdev state. 1177e14bb325SJeff Bonwick */ 1178e14bb325SJeff Bonwick void 11798f18d1faSGeorge Wilson spa_vdev_state_enter(spa_t *spa, int oplocks) 1180e14bb325SJeff Bonwick { 11818f18d1faSGeorge Wilson int locks = SCL_STATE_ALL | oplocks; 11828f18d1faSGeorge Wilson 1183dcba9f3fSGeorge Wilson /* 1184dcba9f3fSGeorge Wilson * Root pools may need to read of the underlying devfs filesystem 1185dcba9f3fSGeorge Wilson * when opening up a vdev. Unfortunately if we're holding the 1186dcba9f3fSGeorge Wilson * SCL_ZIO lock it will result in a deadlock when we try to issue 1187dcba9f3fSGeorge Wilson * the read from the root filesystem. Instead we "prefetch" 1188dcba9f3fSGeorge Wilson * the associated vnodes that we need prior to opening the 1189dcba9f3fSGeorge Wilson * underlying devices and cache them so that we can prevent 1190dcba9f3fSGeorge Wilson * any I/O when we are doing the actual open. 1191dcba9f3fSGeorge Wilson */ 1192dcba9f3fSGeorge Wilson if (spa_is_root(spa)) { 11939842588bSGeorge Wilson int low = locks & ~(SCL_ZIO - 1); 11949842588bSGeorge Wilson int high = locks & ~low; 11959842588bSGeorge Wilson 11969842588bSGeorge Wilson spa_config_enter(spa, high, spa, RW_WRITER); 1197dcba9f3fSGeorge Wilson vdev_hold(spa->spa_root_vdev); 11989842588bSGeorge Wilson spa_config_enter(spa, low, spa, RW_WRITER); 1199dcba9f3fSGeorge Wilson } else { 1200dcba9f3fSGeorge Wilson spa_config_enter(spa, locks, spa, RW_WRITER); 1201dcba9f3fSGeorge Wilson } 12028f18d1faSGeorge Wilson spa->spa_vdev_locks = locks; 1203e14bb325SJeff Bonwick } 1204e14bb325SJeff Bonwick 1205e14bb325SJeff Bonwick int 1206e14bb325SJeff Bonwick spa_vdev_state_exit(spa_t *spa, vdev_t *vd, int error) 1207e14bb325SJeff Bonwick { 1208c6065d0fSGeorge Wilson boolean_t config_changed = B_FALSE; 1209c6065d0fSGeorge Wilson 1210b24ab676SJeff Bonwick if (vd != NULL || error == 0) 1211b24ab676SJeff Bonwick vdev_dtl_reassess(vd ? vd->vdev_top : spa->spa_root_vdev, 1212b24ab676SJeff Bonwick 0, 0, B_FALSE); 1213b24ab676SJeff Bonwick 12148f18d1faSGeorge Wilson if (vd != NULL) { 1215e14bb325SJeff Bonwick vdev_state_dirty(vd->vdev_top); 1216c6065d0fSGeorge Wilson config_changed = B_TRUE; 12178f18d1faSGeorge Wilson spa->spa_config_generation++; 12188f18d1faSGeorge Wilson } 1219e14bb325SJeff Bonwick 1220dcba9f3fSGeorge Wilson if (spa_is_root(spa)) 1221dcba9f3fSGeorge Wilson vdev_rele(spa->spa_root_vdev); 1222dcba9f3fSGeorge Wilson 12238f18d1faSGeorge Wilson ASSERT3U(spa->spa_vdev_locks, >=, SCL_STATE_ALL); 12248f18d1faSGeorge Wilson spa_config_exit(spa, spa->spa_vdev_locks, spa); 1225e14bb325SJeff Bonwick 12268ad4d6ddSJeff Bonwick /* 12278ad4d6ddSJeff Bonwick * If anything changed, wait for it to sync. This ensures that, 12288ad4d6ddSJeff Bonwick * from the system administrator's perspective, zpool(1M) commands 12298ad4d6ddSJeff Bonwick * are synchronous. This is important for things like zpool offline: 12308ad4d6ddSJeff Bonwick * when the command completes, you expect no further I/O from ZFS. 12318ad4d6ddSJeff Bonwick */ 12328ad4d6ddSJeff Bonwick if (vd != NULL) 12338ad4d6ddSJeff Bonwick txg_wait_synced(spa->spa_dsl_pool, 0); 12348ad4d6ddSJeff Bonwick 1235c6065d0fSGeorge Wilson /* 1236c6065d0fSGeorge Wilson * If the config changed, update the config cache. 1237c6065d0fSGeorge Wilson */ 1238c6065d0fSGeorge Wilson if (config_changed) { 1239c6065d0fSGeorge Wilson mutex_enter(&spa_namespace_lock); 1240c6065d0fSGeorge Wilson spa_config_sync(spa, B_FALSE, B_TRUE); 1241c6065d0fSGeorge Wilson mutex_exit(&spa_namespace_lock); 1242c6065d0fSGeorge Wilson } 1243c6065d0fSGeorge Wilson 1244e14bb325SJeff Bonwick return (error); 1245e14bb325SJeff Bonwick } 1246e14bb325SJeff Bonwick 1247fa9e4066Sahrens /* 1248fa9e4066Sahrens * ========================================================================== 1249fa9e4066Sahrens * Miscellaneous functions 1250fa9e4066Sahrens * ========================================================================== 1251fa9e4066Sahrens */ 1252fa9e4066Sahrens 1253ad135b5dSChristopher Siden void 125443466aaeSMax Grossman spa_activate_mos_feature(spa_t *spa, const char *feature, dmu_tx_t *tx) 1255ad135b5dSChristopher Siden { 12562acef22dSMatthew Ahrens if (!nvlist_exists(spa->spa_label_features, feature)) { 12572acef22dSMatthew Ahrens fnvlist_add_boolean(spa->spa_label_features, feature); 125843466aaeSMax Grossman /* 125943466aaeSMax Grossman * When we are creating the pool (tx_txg==TXG_INITIAL), we can't 126043466aaeSMax Grossman * dirty the vdev config because lock SCL_CONFIG is not held. 126143466aaeSMax Grossman * Thankfully, in this case we don't need to dirty the config 126243466aaeSMax Grossman * because it will be written out anyway when we finish 126343466aaeSMax Grossman * creating the pool. 126443466aaeSMax Grossman */ 126543466aaeSMax Grossman if (tx->tx_txg != TXG_INITIAL) 126643466aaeSMax Grossman vdev_config_dirty(spa->spa_root_vdev); 12672acef22dSMatthew Ahrens } 1268ad135b5dSChristopher Siden } 1269ad135b5dSChristopher Siden 1270ad135b5dSChristopher Siden void 1271ad135b5dSChristopher Siden spa_deactivate_mos_feature(spa_t *spa, const char *feature) 1272ad135b5dSChristopher Siden { 12732acef22dSMatthew Ahrens if (nvlist_remove_all(spa->spa_label_features, feature) == 0) 12742acef22dSMatthew Ahrens vdev_config_dirty(spa->spa_root_vdev); 1275ad135b5dSChristopher Siden } 1276ad135b5dSChristopher Siden 1277fa9e4066Sahrens /* 1278fa9e4066Sahrens * Rename a spa_t. 1279fa9e4066Sahrens */ 1280fa9e4066Sahrens int 1281fa9e4066Sahrens spa_rename(const char *name, const char *newname) 1282fa9e4066Sahrens { 1283fa9e4066Sahrens spa_t *spa; 1284fa9e4066Sahrens int err; 1285fa9e4066Sahrens 1286fa9e4066Sahrens /* 1287fa9e4066Sahrens * Lookup the spa_t and grab the config lock for writing. We need to 1288fa9e4066Sahrens * actually open the pool so that we can sync out the necessary labels. 1289fa9e4066Sahrens * It's OK to call spa_open() with the namespace lock held because we 1290ea8dc4b6Seschrock * allow recursive calls for other reasons. 1291fa9e4066Sahrens */ 1292fa9e4066Sahrens mutex_enter(&spa_namespace_lock); 1293fa9e4066Sahrens if ((err = spa_open(name, &spa, FTAG)) != 0) { 1294fa9e4066Sahrens mutex_exit(&spa_namespace_lock); 1295fa9e4066Sahrens return (err); 1296fa9e4066Sahrens } 1297fa9e4066Sahrens 1298e14bb325SJeff Bonwick spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1299fa9e4066Sahrens 1300fa9e4066Sahrens avl_remove(&spa_namespace_avl, spa); 1301e14bb325SJeff Bonwick (void) strlcpy(spa->spa_name, newname, sizeof (spa->spa_name)); 1302fa9e4066Sahrens avl_add(&spa_namespace_avl, spa); 1303fa9e4066Sahrens 1304fa9e4066Sahrens /* 1305fa9e4066Sahrens * Sync all labels to disk with the new names by marking the root vdev 1306fa9e4066Sahrens * dirty and waiting for it to sync. It will pick up the new pool name 1307fa9e4066Sahrens * during the sync. 1308fa9e4066Sahrens */ 1309fa9e4066Sahrens vdev_config_dirty(spa->spa_root_vdev); 1310fa9e4066Sahrens 1311e14bb325SJeff Bonwick spa_config_exit(spa, SCL_ALL, FTAG); 1312fa9e4066Sahrens 13130373e76bSbonwick txg_wait_synced(spa->spa_dsl_pool, 0); 1314fa9e4066Sahrens 1315fa9e4066Sahrens /* 1316fa9e4066Sahrens * Sync the updated config cache. 1317fa9e4066Sahrens */ 1318c5904d13Seschrock spa_config_sync(spa, B_FALSE, B_TRUE); 1319fa9e4066Sahrens 1320fa9e4066Sahrens spa_close(spa, FTAG); 1321fa9e4066Sahrens 1322fa9e4066Sahrens mutex_exit(&spa_namespace_lock); 1323fa9e4066Sahrens 1324fa9e4066Sahrens return (0); 1325fa9e4066Sahrens } 1326fa9e4066Sahrens 1327fa9e4066Sahrens /* 1328f9af39baSGeorge Wilson * Return the spa_t associated with given pool_guid, if it exists. If 1329f9af39baSGeorge Wilson * device_guid is non-zero, determine whether the pool exists *and* contains 1330f9af39baSGeorge Wilson * a device with the specified device_guid. 1331fa9e4066Sahrens */ 1332f9af39baSGeorge Wilson spa_t * 1333f9af39baSGeorge Wilson spa_by_guid(uint64_t pool_guid, uint64_t device_guid) 1334fa9e4066Sahrens { 1335fa9e4066Sahrens spa_t *spa; 1336fa9e4066Sahrens avl_tree_t *t = &spa_namespace_avl; 1337fa9e4066Sahrens 1338ea8dc4b6Seschrock ASSERT(MUTEX_HELD(&spa_namespace_lock)); 1339fa9e4066Sahrens 1340fa9e4066Sahrens for (spa = avl_first(t); spa != NULL; spa = AVL_NEXT(t, spa)) { 1341fa9e4066Sahrens if (spa->spa_state == POOL_STATE_UNINITIALIZED) 1342fa9e4066Sahrens continue; 1343fa9e4066Sahrens if (spa->spa_root_vdev == NULL) 1344fa9e4066Sahrens continue; 134539c23413Seschrock if (spa_guid(spa) == pool_guid) { 134639c23413Seschrock if (device_guid == 0) 134739c23413Seschrock break; 134839c23413Seschrock 134939c23413Seschrock if (vdev_lookup_by_guid(spa->spa_root_vdev, 135039c23413Seschrock device_guid) != NULL) 135139c23413Seschrock break; 135239c23413Seschrock 135339c23413Seschrock /* 13548654d025Sperrin * Check any devices we may be in the process of adding. 135539c23413Seschrock */ 135639c23413Seschrock if (spa->spa_pending_vdev) { 135739c23413Seschrock if (vdev_lookup_by_guid(spa->spa_pending_vdev, 135839c23413Seschrock device_guid) != NULL) 135939c23413Seschrock break; 136039c23413Seschrock } 136139c23413Seschrock } 1362fa9e4066Sahrens } 1363fa9e4066Sahrens 1364f9af39baSGeorge Wilson return (spa); 1365f9af39baSGeorge Wilson } 1366f9af39baSGeorge Wilson 1367f9af39baSGeorge Wilson /* 1368f9af39baSGeorge Wilson * Determine whether a pool with the given pool_guid exists. 1369f9af39baSGeorge Wilson */ 1370f9af39baSGeorge Wilson boolean_t 1371f9af39baSGeorge Wilson spa_guid_exists(uint64_t pool_guid, uint64_t device_guid) 1372f9af39baSGeorge Wilson { 1373f9af39baSGeorge Wilson return (spa_by_guid(pool_guid, device_guid) != NULL); 1374fa9e4066Sahrens } 1375fa9e4066Sahrens 1376fa9e4066Sahrens char * 1377fa9e4066Sahrens spa_strdup(const char *s) 1378fa9e4066Sahrens { 1379fa9e4066Sahrens size_t len; 1380fa9e4066Sahrens char *new; 1381fa9e4066Sahrens 1382fa9e4066Sahrens len = strlen(s); 1383fa9e4066Sahrens new = kmem_alloc(len + 1, KM_SLEEP); 1384fa9e4066Sahrens bcopy(s, new, len); 1385fa9e4066Sahrens new[len] = '\0'; 1386fa9e4066Sahrens 1387fa9e4066Sahrens return (new); 1388fa9e4066Sahrens } 1389fa9e4066Sahrens 1390fa9e4066Sahrens void 1391fa9e4066Sahrens spa_strfree(char *s) 1392fa9e4066Sahrens { 1393fa9e4066Sahrens kmem_free(s, strlen(s) + 1); 1394fa9e4066Sahrens } 1395fa9e4066Sahrens 1396fa9e4066Sahrens uint64_t 1397fa9e4066Sahrens spa_get_random(uint64_t range) 1398fa9e4066Sahrens { 1399fa9e4066Sahrens uint64_t r; 1400fa9e4066Sahrens 1401fa9e4066Sahrens ASSERT(range != 0); 1402fa9e4066Sahrens 1403fa9e4066Sahrens (void) random_get_pseudo_bytes((void *)&r, sizeof (uint64_t)); 1404fa9e4066Sahrens 1405fa9e4066Sahrens return (r % range); 1406fa9e4066Sahrens } 1407fa9e4066Sahrens 14081195e687SMark J Musante uint64_t 14091195e687SMark J Musante spa_generate_guid(spa_t *spa) 14101195e687SMark J Musante { 14111195e687SMark J Musante uint64_t guid = spa_get_random(-1ULL); 14121195e687SMark J Musante 14131195e687SMark J Musante if (spa != NULL) { 14141195e687SMark J Musante while (guid == 0 || spa_guid_exists(spa_guid(spa), guid)) 14151195e687SMark J Musante guid = spa_get_random(-1ULL); 14161195e687SMark J Musante } else { 14171195e687SMark J Musante while (guid == 0 || spa_guid_exists(guid, 0)) 14181195e687SMark J Musante guid = spa_get_random(-1ULL); 14191195e687SMark J Musante } 14201195e687SMark J Musante 14211195e687SMark J Musante return (guid); 14221195e687SMark J Musante } 14231195e687SMark J Musante 1424fa9e4066Sahrens void 142543466aaeSMax Grossman snprintf_blkptr(char *buf, size_t buflen, const blkptr_t *bp) 1426fa9e4066Sahrens { 1427ad135b5dSChristopher Siden char type[256]; 1428f0ba89beSJeff Bonwick char *checksum = NULL; 1429f0ba89beSJeff Bonwick char *compress = NULL; 1430f0ba89beSJeff Bonwick 1431f0ba89beSJeff Bonwick if (bp != NULL) { 1432ad135b5dSChristopher Siden if (BP_GET_TYPE(bp) & DMU_OT_NEWTYPE) { 1433ad135b5dSChristopher Siden dmu_object_byteswap_t bswap = 1434ad135b5dSChristopher Siden DMU_OT_BYTESWAP(BP_GET_TYPE(bp)); 1435ad135b5dSChristopher Siden (void) snprintf(type, sizeof (type), "bswap %s %s", 1436ad135b5dSChristopher Siden DMU_OT_IS_METADATA(BP_GET_TYPE(bp)) ? 1437ad135b5dSChristopher Siden "metadata" : "data", 1438ad135b5dSChristopher Siden dmu_ot_byteswap[bswap].ob_name); 1439ad135b5dSChristopher Siden } else { 1440ad135b5dSChristopher Siden (void) strlcpy(type, dmu_ot[BP_GET_TYPE(bp)].ot_name, 1441ad135b5dSChristopher Siden sizeof (type)); 1442ad135b5dSChristopher Siden } 14435d7b4d43SMatthew Ahrens if (!BP_IS_EMBEDDED(bp)) { 14445d7b4d43SMatthew Ahrens checksum = 14455d7b4d43SMatthew Ahrens zio_checksum_table[BP_GET_CHECKSUM(bp)].ci_name; 14465d7b4d43SMatthew Ahrens } 1447f0ba89beSJeff Bonwick compress = zio_compress_table[BP_GET_COMPRESS(bp)].ci_name; 1448f0ba89beSJeff Bonwick } 1449fa9e4066Sahrens 145043466aaeSMax Grossman SNPRINTF_BLKPTR(snprintf, ' ', buf, buflen, bp, type, checksum, 145143466aaeSMax Grossman compress); 1452fa9e4066Sahrens } 1453fa9e4066Sahrens 1454fa9e4066Sahrens void 1455fa9e4066Sahrens spa_freeze(spa_t *spa) 1456fa9e4066Sahrens { 1457fa9e4066Sahrens uint64_t freeze_txg = 0; 1458fa9e4066Sahrens 1459e14bb325SJeff Bonwick spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 1460fa9e4066Sahrens if (spa->spa_freeze_txg == UINT64_MAX) { 1461fa9e4066Sahrens freeze_txg = spa_last_synced_txg(spa) + TXG_SIZE; 1462fa9e4066Sahrens spa->spa_freeze_txg = freeze_txg; 1463fa9e4066Sahrens } 1464e14bb325SJeff Bonwick spa_config_exit(spa, SCL_ALL, FTAG); 1465fa9e4066Sahrens if (freeze_txg != 0) 1466fa9e4066Sahrens txg_wait_synced(spa_get_dsl(spa), freeze_txg); 1467fa9e4066Sahrens } 1468fa9e4066Sahrens 14690125049cSahrens void 14700125049cSahrens zfs_panic_recover(const char *fmt, ...) 14710125049cSahrens { 14720125049cSahrens va_list adx; 14730125049cSahrens 14740125049cSahrens va_start(adx, fmt); 14750125049cSahrens vcmn_err(zfs_recover ? CE_WARN : CE_PANIC, fmt, adx); 14760125049cSahrens va_end(adx); 14770125049cSahrens } 14780125049cSahrens 14793f9d6ad7SLin Ling /* 14803f9d6ad7SLin Ling * This is a stripped-down version of strtoull, suitable only for converting 1481f7170741SWill Andrews * lowercase hexadecimal numbers that don't overflow. 14823f9d6ad7SLin Ling */ 14833f9d6ad7SLin Ling uint64_t 14843f9d6ad7SLin Ling strtonum(const char *str, char **nptr) 14853f9d6ad7SLin Ling { 14863f9d6ad7SLin Ling uint64_t val = 0; 14873f9d6ad7SLin Ling char c; 14883f9d6ad7SLin Ling int digit; 14893f9d6ad7SLin Ling 14903f9d6ad7SLin Ling while ((c = *str) != '\0') { 14913f9d6ad7SLin Ling if (c >= '0' && c <= '9') 14923f9d6ad7SLin Ling digit = c - '0'; 14933f9d6ad7SLin Ling else if (c >= 'a' && c <= 'f') 14943f9d6ad7SLin Ling digit = 10 + c - 'a'; 14953f9d6ad7SLin Ling else 14963f9d6ad7SLin Ling break; 14973f9d6ad7SLin Ling 14983f9d6ad7SLin Ling val *= 16; 14993f9d6ad7SLin Ling val += digit; 15003f9d6ad7SLin Ling 15013f9d6ad7SLin Ling str++; 15023f9d6ad7SLin Ling } 15033f9d6ad7SLin Ling 15043f9d6ad7SLin Ling if (nptr) 15053f9d6ad7SLin Ling *nptr = (char *)str; 15063f9d6ad7SLin Ling 15073f9d6ad7SLin Ling return (val); 15083f9d6ad7SLin Ling } 15093f9d6ad7SLin Ling 1510fa9e4066Sahrens /* 1511fa9e4066Sahrens * ========================================================================== 1512fa9e4066Sahrens * Accessor functions 1513fa9e4066Sahrens * ========================================================================== 1514fa9e4066Sahrens */ 1515fa9e4066Sahrens 1516088f3894Sahrens boolean_t 151788b7b0f2SMatthew Ahrens spa_shutting_down(spa_t *spa) 1518fa9e4066Sahrens { 151988b7b0f2SMatthew Ahrens return (spa->spa_async_suspended); 1520fa9e4066Sahrens } 1521fa9e4066Sahrens 1522fa9e4066Sahrens dsl_pool_t * 1523fa9e4066Sahrens spa_get_dsl(spa_t *spa) 1524fa9e4066Sahrens { 1525fa9e4066Sahrens return (spa->spa_dsl_pool); 1526fa9e4066Sahrens } 1527fa9e4066Sahrens 1528ad135b5dSChristopher Siden boolean_t 1529ad135b5dSChristopher Siden spa_is_initializing(spa_t *spa) 1530ad135b5dSChristopher Siden { 1531ad135b5dSChristopher Siden return (spa->spa_is_initializing); 1532ad135b5dSChristopher Siden } 1533ad135b5dSChristopher Siden 1534fa9e4066Sahrens blkptr_t * 1535fa9e4066Sahrens spa_get_rootblkptr(spa_t *spa) 1536fa9e4066Sahrens { 1537fa9e4066Sahrens return (&spa->spa_ubsync.ub_rootbp); 1538fa9e4066Sahrens } 1539fa9e4066Sahrens 1540fa9e4066Sahrens void 1541fa9e4066Sahrens spa_set_rootblkptr(spa_t *spa, const blkptr_t *bp) 1542fa9e4066Sahrens { 1543fa9e4066Sahrens spa->spa_uberblock.ub_rootbp = *bp; 1544fa9e4066Sahrens } 1545fa9e4066Sahrens 1546fa9e4066Sahrens void 1547fa9e4066Sahrens spa_altroot(spa_t *spa, char *buf, size_t buflen) 1548fa9e4066Sahrens { 1549fa9e4066Sahrens if (spa->spa_root == NULL) 1550fa9e4066Sahrens buf[0] = '\0'; 1551fa9e4066Sahrens else 1552fa9e4066Sahrens (void) strncpy(buf, spa->spa_root, buflen); 1553fa9e4066Sahrens } 1554fa9e4066Sahrens 1555fa9e4066Sahrens int 1556fa9e4066Sahrens spa_sync_pass(spa_t *spa) 1557fa9e4066Sahrens { 1558fa9e4066Sahrens return (spa->spa_sync_pass); 1559fa9e4066Sahrens } 1560fa9e4066Sahrens 1561fa9e4066Sahrens char * 1562fa9e4066Sahrens spa_name(spa_t *spa) 1563fa9e4066Sahrens { 1564fa9e4066Sahrens return (spa->spa_name); 1565fa9e4066Sahrens } 1566fa9e4066Sahrens 1567fa9e4066Sahrens uint64_t 1568fa9e4066Sahrens spa_guid(spa_t *spa) 1569fa9e4066Sahrens { 1570dfbb9432SGeorge Wilson dsl_pool_t *dp = spa_get_dsl(spa); 1571dfbb9432SGeorge Wilson uint64_t guid; 1572dfbb9432SGeorge Wilson 1573b5989ec7Seschrock /* 1574b5989ec7Seschrock * If we fail to parse the config during spa_load(), we can go through 1575b5989ec7Seschrock * the error path (which posts an ereport) and end up here with no root 1576e9103aaeSGarrett D'Amore * vdev. We stash the original pool guid in 'spa_config_guid' to handle 1577b5989ec7Seschrock * this case. 1578b5989ec7Seschrock */ 1579dfbb9432SGeorge Wilson if (spa->spa_root_vdev == NULL) 1580dfbb9432SGeorge Wilson return (spa->spa_config_guid); 1581dfbb9432SGeorge Wilson 1582dfbb9432SGeorge Wilson guid = spa->spa_last_synced_guid != 0 ? 1583dfbb9432SGeorge Wilson spa->spa_last_synced_guid : spa->spa_root_vdev->vdev_guid; 1584dfbb9432SGeorge Wilson 1585dfbb9432SGeorge Wilson /* 1586dfbb9432SGeorge Wilson * Return the most recently synced out guid unless we're 1587dfbb9432SGeorge Wilson * in syncing context. 1588dfbb9432SGeorge Wilson */ 1589dfbb9432SGeorge Wilson if (dp && dsl_pool_sync_context(dp)) 1590b5989ec7Seschrock return (spa->spa_root_vdev->vdev_guid); 1591b5989ec7Seschrock else 1592dfbb9432SGeorge Wilson return (guid); 1593e9103aaeSGarrett D'Amore } 1594e9103aaeSGarrett D'Amore 1595e9103aaeSGarrett D'Amore uint64_t 1596e9103aaeSGarrett D'Amore spa_load_guid(spa_t *spa) 1597e9103aaeSGarrett D'Amore { 1598e9103aaeSGarrett D'Amore /* 1599e9103aaeSGarrett D'Amore * This is a GUID that exists solely as a reference for the 1600e9103aaeSGarrett D'Amore * purposes of the arc. It is generated at load time, and 1601e9103aaeSGarrett D'Amore * is never written to persistent storage. 1602e9103aaeSGarrett D'Amore */ 1603e9103aaeSGarrett D'Amore return (spa->spa_load_guid); 1604fa9e4066Sahrens } 1605fa9e4066Sahrens 1606fa9e4066Sahrens uint64_t 1607fa9e4066Sahrens spa_last_synced_txg(spa_t *spa) 1608fa9e4066Sahrens { 1609fa9e4066Sahrens return (spa->spa_ubsync.ub_txg); 1610fa9e4066Sahrens } 1611fa9e4066Sahrens 1612fa9e4066Sahrens uint64_t 1613fa9e4066Sahrens spa_first_txg(spa_t *spa) 1614fa9e4066Sahrens { 1615fa9e4066Sahrens return (spa->spa_first_txg); 1616fa9e4066Sahrens } 1617fa9e4066Sahrens 1618b24ab676SJeff Bonwick uint64_t 1619b24ab676SJeff Bonwick spa_syncing_txg(spa_t *spa) 1620b24ab676SJeff Bonwick { 1621b24ab676SJeff Bonwick return (spa->spa_syncing_txg); 1622b24ab676SJeff Bonwick } 1623b24ab676SJeff Bonwick 162488b7b0f2SMatthew Ahrens pool_state_t 1625fa9e4066Sahrens spa_state(spa_t *spa) 1626fa9e4066Sahrens { 1627fa9e4066Sahrens return (spa->spa_state); 1628fa9e4066Sahrens } 1629fa9e4066Sahrens 1630b16da2e2SGeorge Wilson spa_load_state_t 1631b16da2e2SGeorge Wilson spa_load_state(spa_t *spa) 1632b16da2e2SGeorge Wilson { 1633b16da2e2SGeorge Wilson return (spa->spa_load_state); 1634b16da2e2SGeorge Wilson } 1635b16da2e2SGeorge Wilson 1636fa9e4066Sahrens uint64_t 1637fa9e4066Sahrens spa_freeze_txg(spa_t *spa) 1638fa9e4066Sahrens { 1639fa9e4066Sahrens return (spa->spa_freeze_txg); 1640fa9e4066Sahrens } 1641fa9e4066Sahrens 1642fa9e4066Sahrens /* ARGSUSED */ 1643fa9e4066Sahrens uint64_t 164461e255ceSMatthew Ahrens spa_get_worst_case_asize(spa_t *spa, uint64_t lsize) 1645fa9e4066Sahrens { 164669962b56SMatthew Ahrens return (lsize * spa_asize_inflation); 164744cd46caSbillm } 164844cd46caSbillm 16497d46dc6cSMatthew Ahrens /* 16507d46dc6cSMatthew Ahrens * Return the amount of slop space in bytes. It is 1/32 of the pool (3.2%), 16514b5c8e93SMatthew Ahrens * or at least 128MB, unless that would cause it to be more than half the 16524b5c8e93SMatthew Ahrens * pool size. 16537d46dc6cSMatthew Ahrens * 16547d46dc6cSMatthew Ahrens * See the comment above spa_slop_shift for details. 16557d46dc6cSMatthew Ahrens */ 16567d46dc6cSMatthew Ahrens uint64_t 16574b5c8e93SMatthew Ahrens spa_get_slop_space(spa_t *spa) 16584b5c8e93SMatthew Ahrens { 16597d46dc6cSMatthew Ahrens uint64_t space = spa_get_dspace(spa); 16604b5c8e93SMatthew Ahrens return (MAX(space >> spa_slop_shift, MIN(space >> 1, spa_min_slop))); 16617d46dc6cSMatthew Ahrens } 16627d46dc6cSMatthew Ahrens 1663485bbbf5SGeorge Wilson uint64_t 1664485bbbf5SGeorge Wilson spa_get_dspace(spa_t *spa) 1665485bbbf5SGeorge Wilson { 1666485bbbf5SGeorge Wilson return (spa->spa_dspace); 1667485bbbf5SGeorge Wilson } 1668485bbbf5SGeorge Wilson 1669485bbbf5SGeorge Wilson void 1670485bbbf5SGeorge Wilson spa_update_dspace(spa_t *spa) 1671485bbbf5SGeorge Wilson { 1672485bbbf5SGeorge Wilson spa->spa_dspace = metaslab_class_get_dspace(spa_normal_class(spa)) + 1673485bbbf5SGeorge Wilson ddt_get_dedup_dspace(spa); 1674485bbbf5SGeorge Wilson } 1675485bbbf5SGeorge Wilson 16760a4e9518Sgw /* 16770a4e9518Sgw * Return the failure mode that has been set to this pool. The default 16780a4e9518Sgw * behavior will be to block all I/Os when a complete failure occurs. 16790a4e9518Sgw */ 16800a4e9518Sgw uint8_t 16810a4e9518Sgw spa_get_failmode(spa_t *spa) 16820a4e9518Sgw { 16830a4e9518Sgw return (spa->spa_failmode); 16840a4e9518Sgw } 16850a4e9518Sgw 1686e14bb325SJeff Bonwick boolean_t 1687e14bb325SJeff Bonwick spa_suspended(spa_t *spa) 1688e14bb325SJeff Bonwick { 1689e14bb325SJeff Bonwick return (spa->spa_suspended); 1690e14bb325SJeff Bonwick } 1691e14bb325SJeff Bonwick 169244cd46caSbillm uint64_t 169344cd46caSbillm spa_version(spa_t *spa) 169444cd46caSbillm { 169544cd46caSbillm return (spa->spa_ubsync.ub_version); 169644cd46caSbillm } 169744cd46caSbillm 1698b24ab676SJeff Bonwick boolean_t 1699b24ab676SJeff Bonwick spa_deflate(spa_t *spa) 1700b24ab676SJeff Bonwick { 1701b24ab676SJeff Bonwick return (spa->spa_deflate); 1702b24ab676SJeff Bonwick } 1703b24ab676SJeff Bonwick 1704b24ab676SJeff Bonwick metaslab_class_t * 1705b24ab676SJeff Bonwick spa_normal_class(spa_t *spa) 1706b24ab676SJeff Bonwick { 1707b24ab676SJeff Bonwick return (spa->spa_normal_class); 1708b24ab676SJeff Bonwick } 1709b24ab676SJeff Bonwick 1710b24ab676SJeff Bonwick metaslab_class_t * 1711b24ab676SJeff Bonwick spa_log_class(spa_t *spa) 1712b24ab676SJeff Bonwick { 1713b24ab676SJeff Bonwick return (spa->spa_log_class); 1714b24ab676SJeff Bonwick } 1715b24ab676SJeff Bonwick 1716bc9014e6SJustin Gibbs void 1717bc9014e6SJustin Gibbs spa_evicting_os_register(spa_t *spa, objset_t *os) 1718bc9014e6SJustin Gibbs { 1719bc9014e6SJustin Gibbs mutex_enter(&spa->spa_evicting_os_lock); 1720bc9014e6SJustin Gibbs list_insert_head(&spa->spa_evicting_os_list, os); 1721bc9014e6SJustin Gibbs mutex_exit(&spa->spa_evicting_os_lock); 1722bc9014e6SJustin Gibbs } 1723bc9014e6SJustin Gibbs 1724bc9014e6SJustin Gibbs void 1725bc9014e6SJustin Gibbs spa_evicting_os_deregister(spa_t *spa, objset_t *os) 1726bc9014e6SJustin Gibbs { 1727bc9014e6SJustin Gibbs mutex_enter(&spa->spa_evicting_os_lock); 1728bc9014e6SJustin Gibbs list_remove(&spa->spa_evicting_os_list, os); 1729bc9014e6SJustin Gibbs cv_broadcast(&spa->spa_evicting_os_cv); 1730bc9014e6SJustin Gibbs mutex_exit(&spa->spa_evicting_os_lock); 1731bc9014e6SJustin Gibbs } 1732bc9014e6SJustin Gibbs 1733bc9014e6SJustin Gibbs void 1734bc9014e6SJustin Gibbs spa_evicting_os_wait(spa_t *spa) 1735bc9014e6SJustin Gibbs { 1736bc9014e6SJustin Gibbs mutex_enter(&spa->spa_evicting_os_lock); 1737bc9014e6SJustin Gibbs while (!list_is_empty(&spa->spa_evicting_os_list)) 1738bc9014e6SJustin Gibbs cv_wait(&spa->spa_evicting_os_cv, &spa->spa_evicting_os_lock); 1739bc9014e6SJustin Gibbs mutex_exit(&spa->spa_evicting_os_lock); 1740bc9014e6SJustin Gibbs 1741bc9014e6SJustin Gibbs dmu_buf_user_evict_wait(); 1742bc9014e6SJustin Gibbs } 1743bc9014e6SJustin Gibbs 174444cd46caSbillm int 174544cd46caSbillm spa_max_replication(spa_t *spa) 174644cd46caSbillm { 174744cd46caSbillm /* 1748e7437265Sahrens * As of SPA_VERSION == SPA_VERSION_DITTO_BLOCKS, we are able to 174944cd46caSbillm * handle BPs with more than one DVA allocated. Set our max 175044cd46caSbillm * replication level accordingly. 1751fa9e4066Sahrens */ 1752e7437265Sahrens if (spa_version(spa) < SPA_VERSION_DITTO_BLOCKS) 175344cd46caSbillm return (1); 175444cd46caSbillm return (MIN(SPA_DVAS_PER_BP, spa_max_replication_override)); 1755fa9e4066Sahrens } 1756fa9e4066Sahrens 17573f9d6ad7SLin Ling int 17583f9d6ad7SLin Ling spa_prev_software_version(spa_t *spa) 17593f9d6ad7SLin Ling { 17603f9d6ad7SLin Ling return (spa->spa_prev_software_version); 17613f9d6ad7SLin Ling } 17623f9d6ad7SLin Ling 1763283b8460SGeorge.Wilson uint64_t 1764283b8460SGeorge.Wilson spa_deadman_synctime(spa_t *spa) 1765283b8460SGeorge.Wilson { 1766283b8460SGeorge.Wilson return (spa->spa_deadman_synctime); 1767283b8460SGeorge.Wilson } 1768283b8460SGeorge.Wilson 176999653d4eSeschrock uint64_t 1770b24ab676SJeff Bonwick dva_get_dsize_sync(spa_t *spa, const dva_t *dva) 177199653d4eSeschrock { 1772b24ab676SJeff Bonwick uint64_t asize = DVA_GET_ASIZE(dva); 1773b24ab676SJeff Bonwick uint64_t dsize = asize; 177499653d4eSeschrock 1775b24ab676SJeff Bonwick ASSERT(spa_config_held(spa, SCL_ALL, RW_READER) != 0); 177699653d4eSeschrock 1777b24ab676SJeff Bonwick if (asize != 0 && spa->spa_deflate) { 1778b24ab676SJeff Bonwick vdev_t *vd = vdev_lookup_top(spa, DVA_GET_VDEV(dva)); 1779b24ab676SJeff Bonwick dsize = (asize >> SPA_MINBLOCKSHIFT) * vd->vdev_deflate_ratio; 178099653d4eSeschrock } 1781b24ab676SJeff Bonwick 1782b24ab676SJeff Bonwick return (dsize); 1783b24ab676SJeff Bonwick } 1784b24ab676SJeff Bonwick 1785b24ab676SJeff Bonwick uint64_t 1786b24ab676SJeff Bonwick bp_get_dsize_sync(spa_t *spa, const blkptr_t *bp) 1787b24ab676SJeff Bonwick { 1788b24ab676SJeff Bonwick uint64_t dsize = 0; 1789b24ab676SJeff Bonwick 17905d7b4d43SMatthew Ahrens for (int d = 0; d < BP_GET_NDVAS(bp); d++) 1791b24ab676SJeff Bonwick dsize += dva_get_dsize_sync(spa, &bp->blk_dva[d]); 1792b24ab676SJeff Bonwick 1793b24ab676SJeff Bonwick return (dsize); 1794b24ab676SJeff Bonwick } 1795b24ab676SJeff Bonwick 1796b24ab676SJeff Bonwick uint64_t 1797b24ab676SJeff Bonwick bp_get_dsize(spa_t *spa, const blkptr_t *bp) 1798b24ab676SJeff Bonwick { 1799b24ab676SJeff Bonwick uint64_t dsize = 0; 1800b24ab676SJeff Bonwick 1801b24ab676SJeff Bonwick spa_config_enter(spa, SCL_VDEV, FTAG, RW_READER); 1802b24ab676SJeff Bonwick 18035d7b4d43SMatthew Ahrens for (int d = 0; d < BP_GET_NDVAS(bp); d++) 1804b24ab676SJeff Bonwick dsize += dva_get_dsize_sync(spa, &bp->blk_dva[d]); 1805b24ab676SJeff Bonwick 1806e14bb325SJeff Bonwick spa_config_exit(spa, SCL_VDEV, FTAG); 1807b24ab676SJeff Bonwick 1808b24ab676SJeff Bonwick return (dsize); 180999653d4eSeschrock } 181099653d4eSeschrock 1811fa9e4066Sahrens /* 1812fa9e4066Sahrens * ========================================================================== 1813fa9e4066Sahrens * Initialization and Termination 1814fa9e4066Sahrens * ========================================================================== 1815fa9e4066Sahrens */ 1816fa9e4066Sahrens 1817fa9e4066Sahrens static int 1818fa9e4066Sahrens spa_name_compare(const void *a1, const void *a2) 1819fa9e4066Sahrens { 1820fa9e4066Sahrens const spa_t *s1 = a1; 1821fa9e4066Sahrens const spa_t *s2 = a2; 1822fa9e4066Sahrens int s; 1823fa9e4066Sahrens 1824fa9e4066Sahrens s = strcmp(s1->spa_name, s2->spa_name); 1825fa9e4066Sahrens if (s > 0) 1826fa9e4066Sahrens return (1); 1827fa9e4066Sahrens if (s < 0) 1828fa9e4066Sahrens return (-1); 1829fa9e4066Sahrens return (0); 1830fa9e4066Sahrens } 1831fa9e4066Sahrens 18320373e76bSbonwick int 18330373e76bSbonwick spa_busy(void) 18340373e76bSbonwick { 18350373e76bSbonwick return (spa_active_count); 18360373e76bSbonwick } 18370373e76bSbonwick 1838e7cbe64fSgw void 1839e7cbe64fSgw spa_boot_init() 1840e7cbe64fSgw { 1841e7cbe64fSgw spa_config_load(); 1842e7cbe64fSgw } 1843e7cbe64fSgw 1844fa9e4066Sahrens void 1845fa9e4066Sahrens spa_init(int mode) 1846fa9e4066Sahrens { 1847fa9e4066Sahrens mutex_init(&spa_namespace_lock, NULL, MUTEX_DEFAULT, NULL); 1848c25056deSgw mutex_init(&spa_spare_lock, NULL, MUTEX_DEFAULT, NULL); 1849fa94a07fSbrendan mutex_init(&spa_l2cache_lock, NULL, MUTEX_DEFAULT, NULL); 1850fa9e4066Sahrens cv_init(&spa_namespace_cv, NULL, CV_DEFAULT, NULL); 1851fa9e4066Sahrens 1852fa9e4066Sahrens avl_create(&spa_namespace_avl, spa_name_compare, sizeof (spa_t), 1853fa9e4066Sahrens offsetof(spa_t, spa_avl)); 1854fa9e4066Sahrens 1855fa94a07fSbrendan avl_create(&spa_spare_avl, spa_spare_compare, sizeof (spa_aux_t), 1856fa94a07fSbrendan offsetof(spa_aux_t, aux_avl)); 1857fa94a07fSbrendan 1858fa94a07fSbrendan avl_create(&spa_l2cache_avl, spa_l2cache_compare, sizeof (spa_aux_t), 1859fa94a07fSbrendan offsetof(spa_aux_t, aux_avl)); 186099653d4eSeschrock 18618ad4d6ddSJeff Bonwick spa_mode_global = mode; 1862fa9e4066Sahrens 1863283b8460SGeorge.Wilson #ifdef _KERNEL 1864283b8460SGeorge.Wilson spa_arch_init(); 1865283b8460SGeorge.Wilson #else 1866cd1c8b85SMatthew Ahrens if (spa_mode_global != FREAD && dprintf_find_string("watch")) { 1867cd1c8b85SMatthew Ahrens arc_procfd = open("/proc/self/ctl", O_WRONLY); 1868cd1c8b85SMatthew Ahrens if (arc_procfd == -1) { 1869cd1c8b85SMatthew Ahrens perror("could not enable watchpoints: " 1870cd1c8b85SMatthew Ahrens "opening /proc/self/ctl failed: "); 1871cd1c8b85SMatthew Ahrens } else { 1872cd1c8b85SMatthew Ahrens arc_watch = B_TRUE; 1873cd1c8b85SMatthew Ahrens } 1874cd1c8b85SMatthew Ahrens } 1875cd1c8b85SMatthew Ahrens #endif 1876cd1c8b85SMatthew Ahrens 1877fa9e4066Sahrens refcount_init(); 1878fa9e4066Sahrens unique_init(); 18790713e232SGeorge Wilson range_tree_init(); 18808363e80aSGeorge Wilson metaslab_alloc_trace_init(); 1881fa9e4066Sahrens zio_init(); 1882fa9e4066Sahrens dmu_init(); 1883fa9e4066Sahrens zil_init(); 188487db74c1Sek vdev_cache_stat_init(); 188591ebeef5Sahrens zfs_prop_init(); 1886990b4856Slling zpool_prop_init(); 1887ad135b5dSChristopher Siden zpool_feature_init(); 1888fa9e4066Sahrens spa_config_load(); 1889e14bb325SJeff Bonwick l2arc_start(); 1890fa9e4066Sahrens } 1891fa9e4066Sahrens 1892fa9e4066Sahrens void 1893fa9e4066Sahrens spa_fini(void) 1894fa9e4066Sahrens { 1895e14bb325SJeff Bonwick l2arc_stop(); 1896e14bb325SJeff Bonwick 1897fa9e4066Sahrens spa_evict_all(); 1898fa9e4066Sahrens 189987db74c1Sek vdev_cache_stat_fini(); 1900fa9e4066Sahrens zil_fini(); 1901fa9e4066Sahrens dmu_fini(); 1902fa9e4066Sahrens zio_fini(); 19038363e80aSGeorge Wilson metaslab_alloc_trace_fini(); 19040713e232SGeorge Wilson range_tree_fini(); 190591ebeef5Sahrens unique_fini(); 1906fa9e4066Sahrens refcount_fini(); 1907fa9e4066Sahrens 1908fa9e4066Sahrens avl_destroy(&spa_namespace_avl); 190999653d4eSeschrock avl_destroy(&spa_spare_avl); 1910fa94a07fSbrendan avl_destroy(&spa_l2cache_avl); 1911fa9e4066Sahrens 1912fa9e4066Sahrens cv_destroy(&spa_namespace_cv); 1913fa9e4066Sahrens mutex_destroy(&spa_namespace_lock); 1914c25056deSgw mutex_destroy(&spa_spare_lock); 1915fa94a07fSbrendan mutex_destroy(&spa_l2cache_lock); 1916fa9e4066Sahrens } 19176ce0521aSperrin 19186ce0521aSperrin /* 19196ce0521aSperrin * Return whether this pool has slogs. No locking needed. 19206ce0521aSperrin * It's not a problem if the wrong answer is returned as it's only for 19216ce0521aSperrin * performance and not correctness 19226ce0521aSperrin */ 19236ce0521aSperrin boolean_t 19246ce0521aSperrin spa_has_slogs(spa_t *spa) 19256ce0521aSperrin { 19266ce0521aSperrin return (spa->spa_log_class->mc_rotor != NULL); 19276ce0521aSperrin } 1928bf82a41bSeschrock 1929b24ab676SJeff Bonwick spa_log_state_t 1930b24ab676SJeff Bonwick spa_get_log_state(spa_t *spa) 1931b24ab676SJeff Bonwick { 1932b24ab676SJeff Bonwick return (spa->spa_log_state); 1933b24ab676SJeff Bonwick } 1934b24ab676SJeff Bonwick 1935b24ab676SJeff Bonwick void 1936b24ab676SJeff Bonwick spa_set_log_state(spa_t *spa, spa_log_state_t state) 1937b24ab676SJeff Bonwick { 1938b24ab676SJeff Bonwick spa->spa_log_state = state; 1939b24ab676SJeff Bonwick } 1940b24ab676SJeff Bonwick 1941bf82a41bSeschrock boolean_t 1942bf82a41bSeschrock spa_is_root(spa_t *spa) 1943bf82a41bSeschrock { 1944bf82a41bSeschrock return (spa->spa_is_root); 1945bf82a41bSeschrock } 19468ad4d6ddSJeff Bonwick 19478ad4d6ddSJeff Bonwick boolean_t 19488ad4d6ddSJeff Bonwick spa_writeable(spa_t *spa) 19498ad4d6ddSJeff Bonwick { 19508ad4d6ddSJeff Bonwick return (!!(spa->spa_mode & FWRITE)); 19518ad4d6ddSJeff Bonwick } 19528ad4d6ddSJeff Bonwick 195373527f44SAlex Reece /* 195473527f44SAlex Reece * Returns true if there is a pending sync task in any of the current 195573527f44SAlex Reece * syncing txg, the current quiescing txg, or the current open txg. 195673527f44SAlex Reece */ 195773527f44SAlex Reece boolean_t 195873527f44SAlex Reece spa_has_pending_synctask(spa_t *spa) 195973527f44SAlex Reece { 196073527f44SAlex Reece return (!txg_all_lists_empty(&spa->spa_dsl_pool->dp_sync_tasks)); 196173527f44SAlex Reece } 196273527f44SAlex Reece 19638ad4d6ddSJeff Bonwick int 19648ad4d6ddSJeff Bonwick spa_mode(spa_t *spa) 19658ad4d6ddSJeff Bonwick { 19668ad4d6ddSJeff Bonwick return (spa->spa_mode); 19678ad4d6ddSJeff Bonwick } 1968b24ab676SJeff Bonwick 1969b24ab676SJeff Bonwick uint64_t 1970b24ab676SJeff Bonwick spa_bootfs(spa_t *spa) 1971b24ab676SJeff Bonwick { 1972b24ab676SJeff Bonwick return (spa->spa_bootfs); 1973b24ab676SJeff Bonwick } 1974b24ab676SJeff Bonwick 1975b24ab676SJeff Bonwick uint64_t 1976b24ab676SJeff Bonwick spa_delegation(spa_t *spa) 1977b24ab676SJeff Bonwick { 1978b24ab676SJeff Bonwick return (spa->spa_delegation); 1979b24ab676SJeff Bonwick } 1980b24ab676SJeff Bonwick 1981b24ab676SJeff Bonwick objset_t * 1982b24ab676SJeff Bonwick spa_meta_objset(spa_t *spa) 1983b24ab676SJeff Bonwick { 1984b24ab676SJeff Bonwick return (spa->spa_meta_objset); 1985b24ab676SJeff Bonwick } 1986b24ab676SJeff Bonwick 1987b24ab676SJeff Bonwick enum zio_checksum 1988b24ab676SJeff Bonwick spa_dedup_checksum(spa_t *spa) 1989b24ab676SJeff Bonwick { 1990b24ab676SJeff Bonwick return (spa->spa_dedup_checksum); 1991b24ab676SJeff Bonwick } 19923f9d6ad7SLin Ling 19933f9d6ad7SLin Ling /* 19943f9d6ad7SLin Ling * Reset pool scan stat per scan pass (or reboot). 19953f9d6ad7SLin Ling */ 19963f9d6ad7SLin Ling void 19973f9d6ad7SLin Ling spa_scan_stat_init(spa_t *spa) 19983f9d6ad7SLin Ling { 19993f9d6ad7SLin Ling /* data not stored on disk */ 20003f9d6ad7SLin Ling spa->spa_scan_pass_start = gethrestime_sec(); 20013f9d6ad7SLin Ling spa->spa_scan_pass_exam = 0; 20023f9d6ad7SLin Ling vdev_scan_stat_init(spa->spa_root_vdev); 20033f9d6ad7SLin Ling } 20043f9d6ad7SLin Ling 20053f9d6ad7SLin Ling /* 20063f9d6ad7SLin Ling * Get scan stats for zpool status reports 20073f9d6ad7SLin Ling */ 20083f9d6ad7SLin Ling int 20093f9d6ad7SLin Ling spa_scan_get_stats(spa_t *spa, pool_scan_stat_t *ps) 20103f9d6ad7SLin Ling { 20113f9d6ad7SLin Ling dsl_scan_t *scn = spa->spa_dsl_pool ? spa->spa_dsl_pool->dp_scan : NULL; 20123f9d6ad7SLin Ling 20133f9d6ad7SLin Ling if (scn == NULL || scn->scn_phys.scn_func == POOL_SCAN_NONE) 2014be6fd75aSMatthew Ahrens return (SET_ERROR(ENOENT)); 20153f9d6ad7SLin Ling bzero(ps, sizeof (pool_scan_stat_t)); 20163f9d6ad7SLin Ling 20173f9d6ad7SLin Ling /* data stored on disk */ 20183f9d6ad7SLin Ling ps->pss_func = scn->scn_phys.scn_func; 20193f9d6ad7SLin Ling ps->pss_start_time = scn->scn_phys.scn_start_time; 20203f9d6ad7SLin Ling ps->pss_end_time = scn->scn_phys.scn_end_time; 20213f9d6ad7SLin Ling ps->pss_to_examine = scn->scn_phys.scn_to_examine; 20223f9d6ad7SLin Ling ps->pss_examined = scn->scn_phys.scn_examined; 20233f9d6ad7SLin Ling ps->pss_to_process = scn->scn_phys.scn_to_process; 20243f9d6ad7SLin Ling ps->pss_processed = scn->scn_phys.scn_processed; 20253f9d6ad7SLin Ling ps->pss_errors = scn->scn_phys.scn_errors; 20263f9d6ad7SLin Ling ps->pss_state = scn->scn_phys.scn_state; 20273f9d6ad7SLin Ling 20283f9d6ad7SLin Ling /* data not stored on disk */ 20293f9d6ad7SLin Ling ps->pss_pass_start = spa->spa_scan_pass_start; 20303f9d6ad7SLin Ling ps->pss_pass_exam = spa->spa_scan_pass_exam; 20313f9d6ad7SLin Ling 20323f9d6ad7SLin Ling return (0); 20333f9d6ad7SLin Ling } 203409c9d376SGeorge Wilson 203509c9d376SGeorge Wilson boolean_t 203609c9d376SGeorge Wilson spa_debug_enabled(spa_t *spa) 203709c9d376SGeorge Wilson { 203809c9d376SGeorge Wilson return (spa->spa_debug); 203909c9d376SGeorge Wilson } 2040b5152584SMatthew Ahrens 2041b5152584SMatthew Ahrens int 2042b5152584SMatthew Ahrens spa_maxblocksize(spa_t *spa) 2043b5152584SMatthew Ahrens { 2044b5152584SMatthew Ahrens if (spa_feature_is_enabled(spa, SPA_FEATURE_LARGE_BLOCKS)) 2045b5152584SMatthew Ahrens return (SPA_MAXBLOCKSIZE); 2046b5152584SMatthew Ahrens else 2047b5152584SMatthew Ahrens return (SPA_OLD_MAXBLOCKSIZE); 2048b5152584SMatthew Ahrens } 2049