1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or https://opensource.org/licenses/CDDL-1.0. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright (c) 2011, 2024 by Delphix. All rights reserved. 24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 25 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 26 * Copyright 2013 Saso Kiselkov. All rights reserved. 27 * Copyright (c) 2016 Actifio, Inc. All rights reserved. 28 * Copyright (c) 2017, Intel Corporation. 29 * Copyright (c) 2019 Datto Inc. 30 */ 31 32 #ifndef _SYS_SPA_IMPL_H 33 #define _SYS_SPA_IMPL_H 34 35 #include <sys/spa.h> 36 #include <sys/spa_checkpoint.h> 37 #include <sys/spa_log_spacemap.h> 38 #include <sys/vdev.h> 39 #include <sys/vdev_rebuild.h> 40 #include <sys/vdev_removal.h> 41 #include <sys/vdev_raidz.h> 42 #include <sys/metaslab.h> 43 #include <sys/dmu.h> 44 #include <sys/dsl_pool.h> 45 #include <sys/uberblock_impl.h> 46 #include <sys/zfs_context.h> 47 #include <sys/avl.h> 48 #include <sys/zfs_refcount.h> 49 #include <sys/bplist.h> 50 #include <sys/bpobj.h> 51 #include <sys/dsl_crypt.h> 52 #include <sys/zfeature.h> 53 #include <sys/zthr.h> 54 #include <sys/dsl_deadlist.h> 55 #include <zfeature_common.h> 56 57 #ifdef __cplusplus 58 extern "C" { 59 #endif 60 61 typedef struct spa_alloc { 62 kmutex_t spaa_lock; 63 avl_tree_t spaa_tree; 64 } ____cacheline_aligned spa_alloc_t; 65 66 typedef struct spa_allocs_use { 67 kmutex_t sau_lock; 68 uint_t sau_rotor; 69 boolean_t sau_inuse[]; 70 } spa_allocs_use_t; 71 72 typedef struct spa_error_entry { 73 zbookmark_phys_t se_bookmark; 74 char *se_name; 75 avl_node_t se_avl; 76 zbookmark_err_phys_t se_zep; /* not accounted in avl_find */ 77 } spa_error_entry_t; 78 79 typedef struct spa_history_phys { 80 uint64_t sh_pool_create_len; /* ending offset of zpool create */ 81 uint64_t sh_phys_max_off; /* physical EOF */ 82 uint64_t sh_bof; /* logical BOF */ 83 uint64_t sh_eof; /* logical EOF */ 84 uint64_t sh_records_lost; /* num of records overwritten */ 85 } spa_history_phys_t; 86 87 /* 88 * All members must be uint64_t, for byteswap purposes. 89 */ 90 typedef struct spa_removing_phys { 91 uint64_t sr_state; /* dsl_scan_state_t */ 92 93 /* 94 * The vdev ID that we most recently attempted to remove, 95 * or -1 if no removal has been attempted. 96 */ 97 uint64_t sr_removing_vdev; 98 99 /* 100 * The vdev ID that we most recently successfully removed, 101 * or -1 if no devices have been removed. 102 */ 103 uint64_t sr_prev_indirect_vdev; 104 105 uint64_t sr_start_time; 106 uint64_t sr_end_time; 107 108 /* 109 * Note that we can not use the space map's or indirect mapping's 110 * accounting as a substitute for these values, because we need to 111 * count frees of not-yet-copied data as though it did the copy. 112 * Otherwise, we could get into a situation where copied > to_copy, 113 * or we complete before copied == to_copy. 114 */ 115 uint64_t sr_to_copy; /* bytes that need to be copied */ 116 uint64_t sr_copied; /* bytes that have been copied or freed */ 117 } spa_removing_phys_t; 118 119 /* 120 * This struct is stored as an entry in the DMU_POOL_DIRECTORY_OBJECT 121 * (with key DMU_POOL_CONDENSING_INDIRECT). It is present if a condense 122 * of an indirect vdev's mapping object is in progress. 123 */ 124 typedef struct spa_condensing_indirect_phys { 125 /* 126 * The vdev ID of the indirect vdev whose indirect mapping is 127 * being condensed. 128 */ 129 uint64_t scip_vdev; 130 131 /* 132 * The vdev's old obsolete spacemap. This spacemap's contents are 133 * being integrated into the new mapping. 134 */ 135 uint64_t scip_prev_obsolete_sm_object; 136 137 /* 138 * The new mapping object that is being created. 139 */ 140 uint64_t scip_next_mapping_object; 141 } spa_condensing_indirect_phys_t; 142 143 struct spa_aux_vdev { 144 uint64_t sav_object; /* MOS object for device list */ 145 nvlist_t *sav_config; /* cached device config */ 146 vdev_t **sav_vdevs; /* devices */ 147 int sav_count; /* number devices */ 148 boolean_t sav_sync; /* sync the device list */ 149 nvlist_t **sav_pending; /* pending device additions */ 150 uint_t sav_npending; /* # pending devices */ 151 }; 152 153 typedef struct spa_config_lock { 154 kmutex_t scl_lock; 155 kthread_t *scl_writer; 156 int scl_write_wanted; 157 int scl_count; 158 kcondvar_t scl_cv; 159 } ____cacheline_aligned spa_config_lock_t; 160 161 typedef struct spa_config_dirent { 162 list_node_t scd_link; 163 char *scd_path; 164 } spa_config_dirent_t; 165 166 typedef enum zio_taskq_type { 167 ZIO_TASKQ_ISSUE = 0, 168 ZIO_TASKQ_ISSUE_HIGH, 169 ZIO_TASKQ_INTERRUPT, 170 ZIO_TASKQ_INTERRUPT_HIGH, 171 ZIO_TASKQ_TYPES 172 } zio_taskq_type_t; 173 174 /* 175 * State machine for the zpool-poolname process. The states transitions 176 * are done as follows: 177 * 178 * From To Routine 179 * PROC_NONE -> PROC_CREATED spa_activate() 180 * PROC_CREATED -> PROC_ACTIVE spa_thread() 181 * PROC_ACTIVE -> PROC_DEACTIVATE spa_deactivate() 182 * PROC_DEACTIVATE -> PROC_GONE spa_thread() 183 * PROC_GONE -> PROC_NONE spa_deactivate() 184 */ 185 typedef enum spa_proc_state { 186 SPA_PROC_NONE, /* spa_proc = &p0, no process created */ 187 SPA_PROC_CREATED, /* spa_activate() has proc, is waiting */ 188 SPA_PROC_ACTIVE, /* taskqs created, spa_proc set */ 189 SPA_PROC_DEACTIVATE, /* spa_deactivate() requests process exit */ 190 SPA_PROC_GONE /* spa_thread() is exiting, spa_proc = &p0 */ 191 } spa_proc_state_t; 192 193 typedef struct spa_taskqs { 194 uint_t stqs_count; 195 taskq_t **stqs_taskq; 196 } spa_taskqs_t; 197 198 /* one for each thread in the spa sync taskq */ 199 typedef struct spa_syncthread_info { 200 kthread_t *sti_thread; 201 uint_t sti_allocator; 202 } spa_syncthread_info_t; 203 204 typedef enum spa_all_vdev_zap_action { 205 AVZ_ACTION_NONE = 0, 206 AVZ_ACTION_DESTROY, /* Destroy all per-vdev ZAPs and the AVZ. */ 207 AVZ_ACTION_REBUILD, /* Populate the new AVZ, see spa_avz_rebuild */ 208 AVZ_ACTION_INITIALIZE 209 } spa_avz_action_t; 210 211 typedef enum spa_config_source { 212 SPA_CONFIG_SRC_NONE = 0, 213 SPA_CONFIG_SRC_SCAN, /* scan of path (default: /dev/dsk) */ 214 SPA_CONFIG_SRC_CACHEFILE, /* any cachefile */ 215 SPA_CONFIG_SRC_TRYIMPORT, /* returned from call to tryimport */ 216 SPA_CONFIG_SRC_SPLIT, /* new pool in a pool split */ 217 SPA_CONFIG_SRC_MOS /* MOS, but not always from right txg */ 218 } spa_config_source_t; 219 220 struct spa { 221 /* 222 * Fields protected by spa_namespace_lock. 223 */ 224 char spa_name[ZFS_MAX_DATASET_NAME_LEN]; /* pool name */ 225 char *spa_comment; /* comment */ 226 avl_node_t spa_avl; /* node in spa_namespace_avl */ 227 nvlist_t *spa_config; /* last synced config */ 228 nvlist_t *spa_config_syncing; /* currently syncing config */ 229 nvlist_t *spa_config_splitting; /* config for splitting */ 230 nvlist_t *spa_load_info; /* info and errors from load */ 231 uint64_t spa_config_txg; /* txg of last config change */ 232 uint32_t spa_sync_pass; /* iterate-to-convergence */ 233 pool_state_t spa_state; /* pool state */ 234 int spa_inject_ref; /* injection references */ 235 uint8_t spa_sync_on; /* sync threads are running */ 236 spa_load_state_t spa_load_state; /* current load operation */ 237 boolean_t spa_indirect_vdevs_loaded; /* mappings loaded? */ 238 boolean_t spa_trust_config; /* do we trust vdev tree? */ 239 boolean_t spa_is_splitting; /* in the middle of a split? */ 240 spa_config_source_t spa_config_source; /* where config comes from? */ 241 uint64_t spa_import_flags; /* import specific flags */ 242 spa_taskqs_t spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES]; 243 dsl_pool_t *spa_dsl_pool; 244 boolean_t spa_is_initializing; /* true while opening pool */ 245 boolean_t spa_is_exporting; /* true while exporting pool */ 246 kthread_t *spa_load_thread; /* loading, no namespace lock */ 247 metaslab_class_t *spa_normal_class; /* normal data class */ 248 metaslab_class_t *spa_log_class; /* intent log data class */ 249 metaslab_class_t *spa_embedded_log_class; /* log on normal vdevs */ 250 metaslab_class_t *spa_special_class; /* special allocation class */ 251 metaslab_class_t *spa_dedup_class; /* dedup allocation class */ 252 uint64_t spa_first_txg; /* first txg after spa_open() */ 253 uint64_t spa_final_txg; /* txg of export/destroy */ 254 uint64_t spa_freeze_txg; /* freeze pool at this txg */ 255 uint64_t spa_load_max_txg; /* best initial ub_txg */ 256 uint64_t spa_claim_max_txg; /* highest claimed birth txg */ 257 inode_timespec_t spa_loaded_ts; /* 1st successful open time */ 258 objset_t *spa_meta_objset; /* copy of dp->dp_meta_objset */ 259 kmutex_t spa_evicting_os_lock; /* Evicting objset list lock */ 260 list_t spa_evicting_os_list; /* Objsets being evicted. */ 261 kcondvar_t spa_evicting_os_cv; /* Objset Eviction Completion */ 262 txg_list_t spa_vdev_txg_list; /* per-txg dirty vdev list */ 263 vdev_t *spa_root_vdev; /* top-level vdev container */ 264 uint64_t spa_min_ashift; /* of vdevs in normal class */ 265 uint64_t spa_max_ashift; /* of vdevs in normal class */ 266 uint64_t spa_min_alloc; /* of vdevs in normal class */ 267 uint64_t spa_gcd_alloc; /* of vdevs in normal class */ 268 uint64_t spa_config_guid; /* config pool guid */ 269 uint64_t spa_load_guid; /* spa_load initialized guid */ 270 uint64_t spa_last_synced_guid; /* last synced guid */ 271 list_t spa_config_dirty_list; /* vdevs with dirty config */ 272 list_t spa_state_dirty_list; /* vdevs with dirty state */ 273 /* 274 * spa_allocs is an array, whose lengths is stored in spa_alloc_count. 275 * There is one tree and one lock for each allocator, to help improve 276 * allocation performance in write-heavy workloads. 277 */ 278 spa_alloc_t *spa_allocs; 279 spa_allocs_use_t *spa_allocs_use; 280 int spa_alloc_count; 281 int spa_active_allocator; /* selectable allocator */ 282 283 /* per-allocator sync thread taskqs */ 284 taskq_t *spa_sync_tq; 285 spa_syncthread_info_t *spa_syncthreads; 286 287 spa_aux_vdev_t spa_spares; /* hot spares */ 288 spa_aux_vdev_t spa_l2cache; /* L2ARC cache devices */ 289 boolean_t spa_aux_sync_uber; /* need to sync aux uber */ 290 nvlist_t *spa_label_features; /* Features for reading MOS */ 291 uint64_t spa_config_object; /* MOS object for pool config */ 292 uint64_t spa_config_generation; /* config generation number */ 293 uint64_t spa_syncing_txg; /* txg currently syncing */ 294 bpobj_t spa_deferred_bpobj; /* deferred-free bplist */ 295 bplist_t spa_free_bplist[TXG_SIZE]; /* bplist of stuff to free */ 296 zio_cksum_salt_t spa_cksum_salt; /* secret salt for cksum */ 297 /* checksum context templates */ 298 kmutex_t spa_cksum_tmpls_lock; 299 void *spa_cksum_tmpls[ZIO_CHECKSUM_FUNCTIONS]; 300 uberblock_t spa_ubsync; /* last synced uberblock */ 301 uberblock_t spa_uberblock; /* current uberblock */ 302 boolean_t spa_extreme_rewind; /* rewind past deferred frees */ 303 kmutex_t spa_scrub_lock; /* resilver/scrub lock */ 304 uint64_t spa_scrub_inflight; /* in-flight scrub bytes */ 305 306 /* in-flight verification bytes */ 307 uint64_t spa_load_verify_bytes; 308 kcondvar_t spa_scrub_io_cv; /* scrub I/O completion */ 309 uint8_t spa_scrub_active; /* active or suspended? */ 310 uint8_t spa_scrub_type; /* type of scrub we're doing */ 311 uint8_t spa_scrub_finished; /* indicator to rotate logs */ 312 uint8_t spa_scrub_started; /* started since last boot */ 313 uint8_t spa_scrub_reopen; /* scrub doing vdev_reopen */ 314 uint64_t spa_scan_pass_start; /* start time per pass/reboot */ 315 uint64_t spa_scan_pass_scrub_pause; /* scrub pause time */ 316 uint64_t spa_scan_pass_scrub_spent_paused; /* total paused */ 317 uint64_t spa_scan_pass_exam; /* examined bytes per pass */ 318 uint64_t spa_scan_pass_issued; /* issued bytes per pass */ 319 320 /* error scrub pause time in milliseconds */ 321 uint64_t spa_scan_pass_errorscrub_pause; 322 /* total error scrub paused time in milliseconds */ 323 uint64_t spa_scan_pass_errorscrub_spent_paused; 324 /* 325 * We are in the middle of a resilver, and another resilver 326 * is needed once this one completes. This is set iff any 327 * vdev_resilver_deferred is set. 328 */ 329 boolean_t spa_resilver_deferred; 330 kmutex_t spa_async_lock; /* protect async state */ 331 kthread_t *spa_async_thread; /* thread doing async task */ 332 int spa_async_suspended; /* async tasks suspended */ 333 kcondvar_t spa_async_cv; /* wait for thread_exit() */ 334 uint16_t spa_async_tasks; /* async task mask */ 335 uint64_t spa_missing_tvds; /* unopenable tvds on load */ 336 uint64_t spa_missing_tvds_allowed; /* allow loading spa? */ 337 338 uint64_t spa_nonallocating_dspace; 339 spa_removing_phys_t spa_removing_phys; 340 spa_vdev_removal_t *spa_vdev_removal; 341 342 spa_condensing_indirect_phys_t spa_condensing_indirect_phys; 343 spa_condensing_indirect_t *spa_condensing_indirect; 344 zthr_t *spa_condense_zthr; /* zthr doing condense. */ 345 346 vdev_raidz_expand_t *spa_raidz_expand; 347 zthr_t *spa_raidz_expand_zthr; 348 349 uint64_t spa_checkpoint_txg; /* the txg of the checkpoint */ 350 spa_checkpoint_info_t spa_checkpoint_info; /* checkpoint accounting */ 351 zthr_t *spa_checkpoint_discard_zthr; 352 353 space_map_t *spa_syncing_log_sm; /* current log space map */ 354 avl_tree_t spa_sm_logs_by_txg; 355 kmutex_t spa_flushed_ms_lock; /* for metaslabs_by_flushed */ 356 avl_tree_t spa_metaslabs_by_flushed; 357 spa_unflushed_stats_t spa_unflushed_stats; 358 list_t spa_log_summary; 359 uint64_t spa_log_flushall_txg; 360 361 zthr_t *spa_livelist_delete_zthr; /* deleting livelists */ 362 zthr_t *spa_livelist_condense_zthr; /* condensing livelists */ 363 uint64_t spa_livelists_to_delete; /* set of livelists to free */ 364 livelist_condense_entry_t spa_to_condense; /* next to condense */ 365 366 char *spa_root; /* alternate root directory */ 367 uint64_t spa_ena; /* spa-wide ereport ENA */ 368 int spa_last_open_failed; /* error if last open failed */ 369 uint64_t spa_last_ubsync_txg; /* "best" uberblock txg */ 370 uint64_t spa_last_ubsync_txg_ts; /* timestamp from that ub */ 371 uint64_t spa_load_txg; /* ub txg that loaded */ 372 uint64_t spa_load_txg_ts; /* timestamp from that ub */ 373 uint64_t spa_load_meta_errors; /* verify metadata err count */ 374 uint64_t spa_load_data_errors; /* verify data err count */ 375 uint64_t spa_verify_min_txg; /* start txg of verify scrub */ 376 kmutex_t spa_errlog_lock; /* error log lock */ 377 uint64_t spa_errlog_last; /* last error log object */ 378 uint64_t spa_errlog_scrub; /* scrub error log object */ 379 kmutex_t spa_errlist_lock; /* error list/ereport lock */ 380 avl_tree_t spa_errlist_last; /* last error list */ 381 avl_tree_t spa_errlist_scrub; /* scrub error list */ 382 avl_tree_t spa_errlist_healed; /* list of healed blocks */ 383 uint64_t spa_deflate; /* should we deflate? */ 384 uint64_t spa_history; /* history object */ 385 kmutex_t spa_history_lock; /* history lock */ 386 vdev_t *spa_pending_vdev; /* pending vdev additions */ 387 kmutex_t spa_props_lock; /* property lock */ 388 uint64_t spa_pool_props_object; /* object for properties */ 389 uint64_t spa_bootfs; /* default boot filesystem */ 390 uint64_t spa_failmode; /* failure mode for the pool */ 391 uint64_t spa_deadman_failmode; /* failure mode for deadman */ 392 uint64_t spa_delegation; /* delegation on/off */ 393 list_t spa_config_list; /* previous cache file(s) */ 394 /* per-CPU array of root of async I/O: */ 395 zio_t **spa_async_zio_root; 396 zio_t *spa_suspend_zio_root; /* root of all suspended I/O */ 397 zio_t *spa_txg_zio[TXG_SIZE]; /* spa_sync() waits for this */ 398 kmutex_t spa_suspend_lock; /* protects suspend_zio_root */ 399 kcondvar_t spa_suspend_cv; /* notification of resume */ 400 zio_suspend_reason_t spa_suspended; /* pool is suspended */ 401 uint8_t spa_claiming; /* pool is doing zil_claim() */ 402 boolean_t spa_is_root; /* pool is root */ 403 int spa_minref; /* num refs when first opened */ 404 spa_mode_t spa_mode; /* SPA_MODE_{READ|WRITE} */ 405 boolean_t spa_read_spacemaps; /* spacemaps available if ro */ 406 spa_log_state_t spa_log_state; /* log state */ 407 uint64_t spa_autoexpand; /* lun expansion on/off */ 408 ddt_t *spa_ddt[ZIO_CHECKSUM_FUNCTIONS]; /* in-core DDTs */ 409 uint64_t spa_ddt_stat_object; /* DDT statistics */ 410 uint64_t spa_dedup_dspace; /* Cache get_dedup_dspace() */ 411 uint64_t spa_dedup_checksum; /* default dedup checksum */ 412 uint64_t spa_dspace; /* dspace in normal class */ 413 struct brt *spa_brt; /* in-core BRT */ 414 kmutex_t spa_vdev_top_lock; /* dueling offline/remove */ 415 kmutex_t spa_proc_lock; /* protects spa_proc* */ 416 kcondvar_t spa_proc_cv; /* spa_proc_state transitions */ 417 spa_proc_state_t spa_proc_state; /* see definition */ 418 proc_t *spa_proc; /* "zpool-poolname" process */ 419 uintptr_t spa_did; /* if procp != p0, did of t1 */ 420 boolean_t spa_autoreplace; /* autoreplace set in open */ 421 int spa_vdev_locks; /* locks grabbed */ 422 uint64_t spa_creation_version; /* version at pool creation */ 423 uint64_t spa_prev_software_version; /* See ub_software_version */ 424 uint64_t spa_feat_for_write_obj; /* required to write to pool */ 425 uint64_t spa_feat_for_read_obj; /* required to read from pool */ 426 uint64_t spa_feat_desc_obj; /* Feature descriptions */ 427 uint64_t spa_feat_enabled_txg_obj; /* Feature enabled txg */ 428 kmutex_t spa_feat_stats_lock; /* protects spa_feat_stats */ 429 nvlist_t *spa_feat_stats; /* Cache of enabled features */ 430 /* cache feature refcounts */ 431 uint64_t spa_feat_refcount_cache[SPA_FEATURES]; 432 taskqid_t spa_deadman_tqid; /* Task id */ 433 uint64_t spa_deadman_calls; /* number of deadman calls */ 434 hrtime_t spa_sync_starttime; /* starting time of spa_sync */ 435 uint64_t spa_deadman_synctime; /* deadman sync expiration */ 436 uint64_t spa_deadman_ziotime; /* deadman zio expiration */ 437 uint64_t spa_all_vdev_zaps; /* ZAP of per-vd ZAP obj #s */ 438 spa_avz_action_t spa_avz_action; /* destroy/rebuild AVZ? */ 439 uint64_t spa_autotrim; /* automatic background trim? */ 440 uint64_t spa_errata; /* errata issues detected */ 441 spa_stats_t spa_stats; /* assorted spa statistics */ 442 spa_keystore_t spa_keystore; /* loaded crypto keys */ 443 444 /* arc_memory_throttle() parameters during low memory condition */ 445 uint64_t spa_lowmem_page_load; /* memory load during txg */ 446 uint64_t spa_lowmem_last_txg; /* txg window start */ 447 448 hrtime_t spa_ccw_fail_time; /* Conf cache write fail time */ 449 taskq_t *spa_zvol_taskq; /* Taskq for minor management */ 450 taskq_t *spa_metaslab_taskq; /* Taskq for metaslab preload */ 451 taskq_t *spa_prefetch_taskq; /* Taskq for prefetch threads */ 452 taskq_t *spa_upgrade_taskq; /* Taskq for upgrade jobs */ 453 uint64_t spa_multihost; /* multihost aware (mmp) */ 454 mmp_thread_t spa_mmp; /* multihost mmp thread */ 455 list_t spa_leaf_list; /* list of leaf vdevs */ 456 uint64_t spa_leaf_list_gen; /* track leaf_list changes */ 457 uint32_t spa_hostid; /* cached system hostid */ 458 459 /* synchronization for threads in spa_wait */ 460 kmutex_t spa_activities_lock; 461 kcondvar_t spa_activities_cv; 462 kcondvar_t spa_waiters_cv; 463 int spa_waiters; /* number of waiting threads */ 464 boolean_t spa_waiters_cancel; /* waiters should return */ 465 466 char *spa_compatibility; /* compatibility file(s) */ 467 468 /* 469 * spa_refcount & spa_config_lock must be the last elements 470 * because zfs_refcount_t changes size based on compilation options. 471 * In order for the MDB module to function correctly, the other 472 * fields must remain in the same location. 473 */ 474 spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */ 475 zfs_refcount_t spa_refcount; /* number of opens */ 476 }; 477 478 extern char *spa_config_path; 479 extern const char *zfs_deadman_failmode; 480 extern uint_t spa_slop_shift; 481 extern void spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q, 482 task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent, zio_t *zio); 483 extern void spa_taskq_dispatch_sync(spa_t *, zio_type_t t, zio_taskq_type_t q, 484 task_func_t *func, void *arg, uint_t flags); 485 extern void spa_load_spares(spa_t *spa); 486 extern void spa_load_l2cache(spa_t *spa); 487 extern sysevent_t *spa_event_create(spa_t *spa, vdev_t *vd, nvlist_t *hist_nvl, 488 const char *name); 489 extern void spa_event_post(sysevent_t *ev); 490 extern int param_set_deadman_failmode_common(const char *val); 491 extern void spa_set_deadman_synctime(hrtime_t ns); 492 extern void spa_set_deadman_ziotime(hrtime_t ns); 493 extern const char *spa_history_zone(void); 494 extern const char *zfs_active_allocator; 495 extern int param_set_active_allocator_common(const char *val); 496 497 #ifdef __cplusplus 498 } 499 #endif 500 501 #endif /* _SYS_SPA_IMPL_H */ 502