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 http://www.opensolaris.org/os/licensing. 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, 2018 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) 2017 Datto Inc. 28 * Copyright (c) 2017, Intel Corporation. 29 */ 30 31 #ifndef _SYS_SPA_IMPL_H 32 #define _SYS_SPA_IMPL_H 33 34 #include <sys/spa.h> 35 #include <sys/spa_checkpoint.h> 36 #include <sys/vdev.h> 37 #include <sys/vdev_removal.h> 38 #include <sys/metaslab.h> 39 #include <sys/dmu.h> 40 #include <sys/dsl_pool.h> 41 #include <sys/uberblock_impl.h> 42 #include <sys/zfs_context.h> 43 #include <sys/avl.h> 44 #include <sys/refcount.h> 45 #include <sys/bplist.h> 46 #include <sys/bpobj.h> 47 #include <sys/zfeature.h> 48 #include <sys/zthr.h> 49 #include <zfeature_common.h> 50 51 #ifdef __cplusplus 52 extern "C" { 53 #endif 54 55 typedef struct spa_error_entry { 56 zbookmark_phys_t se_bookmark; 57 char *se_name; 58 avl_node_t se_avl; 59 } spa_error_entry_t; 60 61 typedef struct spa_history_phys { 62 uint64_t sh_pool_create_len; /* ending offset of zpool create */ 63 uint64_t sh_phys_max_off; /* physical EOF */ 64 uint64_t sh_bof; /* logical BOF */ 65 uint64_t sh_eof; /* logical EOF */ 66 uint64_t sh_records_lost; /* num of records overwritten */ 67 } spa_history_phys_t; 68 69 /* 70 * All members must be uint64_t, for byteswap purposes. 71 */ 72 typedef struct spa_removing_phys { 73 uint64_t sr_state; /* dsl_scan_state_t */ 74 75 /* 76 * The vdev ID that we most recently attempted to remove, 77 * or -1 if no removal has been attempted. 78 */ 79 uint64_t sr_removing_vdev; 80 81 /* 82 * The vdev ID that we most recently successfully removed, 83 * or -1 if no devices have been removed. 84 */ 85 uint64_t sr_prev_indirect_vdev; 86 87 uint64_t sr_start_time; 88 uint64_t sr_end_time; 89 90 /* 91 * Note that we can not use the space map's or indirect mapping's 92 * accounting as a substitute for these values, because we need to 93 * count frees of not-yet-copied data as though it did the copy. 94 * Otherwise, we could get into a situation where copied > to_copy, 95 * or we complete before copied == to_copy. 96 */ 97 uint64_t sr_to_copy; /* bytes that need to be copied */ 98 uint64_t sr_copied; /* bytes that have been copied or freed */ 99 } spa_removing_phys_t; 100 101 /* 102 * This struct is stored as an entry in the DMU_POOL_DIRECTORY_OBJECT 103 * (with key DMU_POOL_CONDENSING_INDIRECT). It is present if a condense 104 * of an indirect vdev's mapping object is in progress. 105 */ 106 typedef struct spa_condensing_indirect_phys { 107 /* 108 * The vdev ID of the indirect vdev whose indirect mapping is 109 * being condensed. 110 */ 111 uint64_t scip_vdev; 112 113 /* 114 * The vdev's old obsolete spacemap. This spacemap's contents are 115 * being integrated into the new mapping. 116 */ 117 uint64_t scip_prev_obsolete_sm_object; 118 119 /* 120 * The new mapping object that is being created. 121 */ 122 uint64_t scip_next_mapping_object; 123 } spa_condensing_indirect_phys_t; 124 125 struct spa_aux_vdev { 126 uint64_t sav_object; /* MOS object for device list */ 127 nvlist_t *sav_config; /* cached device config */ 128 vdev_t **sav_vdevs; /* devices */ 129 int sav_count; /* number devices */ 130 boolean_t sav_sync; /* sync the device list */ 131 nvlist_t **sav_pending; /* pending device additions */ 132 uint_t sav_npending; /* # pending devices */ 133 }; 134 135 typedef struct spa_config_lock { 136 kmutex_t scl_lock; 137 kthread_t *scl_writer; 138 int scl_write_wanted; 139 kcondvar_t scl_cv; 140 zfs_refcount_t scl_count; 141 } spa_config_lock_t; 142 143 typedef struct spa_config_dirent { 144 list_node_t scd_link; 145 char *scd_path; 146 } spa_config_dirent_t; 147 148 typedef enum zio_taskq_type { 149 ZIO_TASKQ_ISSUE = 0, 150 ZIO_TASKQ_ISSUE_HIGH, 151 ZIO_TASKQ_INTERRUPT, 152 ZIO_TASKQ_INTERRUPT_HIGH, 153 ZIO_TASKQ_TYPES 154 } zio_taskq_type_t; 155 156 /* 157 * State machine for the zpool-poolname process. The states transitions 158 * are done as follows: 159 * 160 * From To Routine 161 * PROC_NONE -> PROC_CREATED spa_activate() 162 * PROC_CREATED -> PROC_ACTIVE spa_thread() 163 * PROC_ACTIVE -> PROC_DEACTIVATE spa_deactivate() 164 * PROC_DEACTIVATE -> PROC_GONE spa_thread() 165 * PROC_GONE -> PROC_NONE spa_deactivate() 166 */ 167 typedef enum spa_proc_state { 168 SPA_PROC_NONE, /* spa_proc = &p0, no process created */ 169 SPA_PROC_CREATED, /* spa_activate() has proc, is waiting */ 170 SPA_PROC_ACTIVE, /* taskqs created, spa_proc set */ 171 SPA_PROC_DEACTIVATE, /* spa_deactivate() requests process exit */ 172 SPA_PROC_GONE /* spa_thread() is exiting, spa_proc = &p0 */ 173 } spa_proc_state_t; 174 175 typedef struct spa_taskqs { 176 uint_t stqs_count; 177 taskq_t **stqs_taskq; 178 } spa_taskqs_t; 179 180 typedef enum spa_all_vdev_zap_action { 181 AVZ_ACTION_NONE = 0, 182 AVZ_ACTION_DESTROY, /* Destroy all per-vdev ZAPs and the AVZ. */ 183 AVZ_ACTION_REBUILD, /* Populate the new AVZ, see spa_avz_rebuild */ 184 AVZ_ACTION_INITIALIZE 185 } spa_avz_action_t; 186 187 typedef enum spa_config_source { 188 SPA_CONFIG_SRC_NONE = 0, 189 SPA_CONFIG_SRC_SCAN, /* scan of path (default: /dev/dsk) */ 190 SPA_CONFIG_SRC_CACHEFILE, /* any cachefile */ 191 SPA_CONFIG_SRC_TRYIMPORT, /* returned from call to tryimport */ 192 SPA_CONFIG_SRC_SPLIT, /* new pool in a pool split */ 193 SPA_CONFIG_SRC_MOS /* MOS, but not always from right txg */ 194 } spa_config_source_t; 195 196 struct spa { 197 /* 198 * Fields protected by spa_namespace_lock. 199 */ 200 char spa_name[ZFS_MAX_DATASET_NAME_LEN]; /* pool name */ 201 char *spa_comment; /* comment */ 202 avl_node_t spa_avl; /* node in spa_namespace_avl */ 203 nvlist_t *spa_config; /* last synced config */ 204 nvlist_t *spa_config_syncing; /* currently syncing config */ 205 nvlist_t *spa_config_splitting; /* config for splitting */ 206 nvlist_t *spa_load_info; /* info and errors from load */ 207 uint64_t spa_config_txg; /* txg of last config change */ 208 int spa_sync_pass; /* iterate-to-convergence */ 209 pool_state_t spa_state; /* pool state */ 210 int spa_inject_ref; /* injection references */ 211 uint8_t spa_sync_on; /* sync threads are running */ 212 spa_load_state_t spa_load_state; /* current load operation */ 213 boolean_t spa_indirect_vdevs_loaded; /* mappings loaded? */ 214 boolean_t spa_trust_config; /* do we trust vdev tree? */ 215 spa_config_source_t spa_config_source; /* where config comes from? */ 216 uint64_t spa_import_flags; /* import specific flags */ 217 spa_taskqs_t spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES]; 218 dsl_pool_t *spa_dsl_pool; 219 boolean_t spa_is_initializing; /* true while opening pool */ 220 metaslab_class_t *spa_normal_class; /* normal data class */ 221 metaslab_class_t *spa_log_class; /* intent log data class */ 222 metaslab_class_t *spa_special_class; /* special allocation class */ 223 metaslab_class_t *spa_dedup_class; /* dedup allocation class */ 224 uint64_t spa_first_txg; /* first txg after spa_open() */ 225 uint64_t spa_final_txg; /* txg of export/destroy */ 226 uint64_t spa_freeze_txg; /* freeze pool at this txg */ 227 uint64_t spa_load_max_txg; /* best initial ub_txg */ 228 uint64_t spa_claim_max_txg; /* highest claimed birth txg */ 229 timespec_t spa_loaded_ts; /* 1st successful open time */ 230 objset_t *spa_meta_objset; /* copy of dp->dp_meta_objset */ 231 kmutex_t spa_evicting_os_lock; /* Evicting objset list lock */ 232 list_t spa_evicting_os_list; /* Objsets being evicted. */ 233 kcondvar_t spa_evicting_os_cv; /* Objset Eviction Completion */ 234 txg_list_t spa_vdev_txg_list; /* per-txg dirty vdev list */ 235 vdev_t *spa_root_vdev; /* top-level vdev container */ 236 int spa_min_ashift; /* of vdevs in normal class */ 237 int spa_max_ashift; /* of vdevs in normal class */ 238 uint64_t spa_config_guid; /* config pool guid */ 239 uint64_t spa_load_guid; /* spa_load initialized guid */ 240 uint64_t spa_last_synced_guid; /* last synced guid */ 241 list_t spa_config_dirty_list; /* vdevs with dirty config */ 242 list_t spa_state_dirty_list; /* vdevs with dirty state */ 243 /* 244 * spa_alloc_locks and spa_alloc_trees are arrays, whose lengths are 245 * stored in spa_alloc_count. There is one tree and one lock for each 246 * allocator, to help improve allocation performance in write-heavy 247 * workloads. 248 */ 249 kmutex_t *spa_alloc_locks; 250 avl_tree_t *spa_alloc_trees; 251 int spa_alloc_count; 252 253 spa_aux_vdev_t spa_spares; /* hot spares */ 254 spa_aux_vdev_t spa_l2cache; /* L2ARC cache devices */ 255 nvlist_t *spa_label_features; /* Features for reading MOS */ 256 uint64_t spa_config_object; /* MOS object for pool config */ 257 uint64_t spa_config_generation; /* config generation number */ 258 uint64_t spa_syncing_txg; /* txg currently syncing */ 259 bpobj_t spa_deferred_bpobj; /* deferred-free bplist */ 260 bplist_t spa_free_bplist[TXG_SIZE]; /* bplist of stuff to free */ 261 zio_cksum_salt_t spa_cksum_salt; /* secret salt for cksum */ 262 /* checksum context templates */ 263 kmutex_t spa_cksum_tmpls_lock; 264 void *spa_cksum_tmpls[ZIO_CHECKSUM_FUNCTIONS]; 265 uberblock_t spa_ubsync; /* last synced uberblock */ 266 uberblock_t spa_uberblock; /* current uberblock */ 267 boolean_t spa_extreme_rewind; /* rewind past deferred frees */ 268 uint64_t spa_last_io; /* lbolt of last non-scan I/O */ 269 kmutex_t spa_scrub_lock; /* resilver/scrub lock */ 270 uint64_t spa_scrub_inflight; /* in-flight scrub I/Os */ 271 kcondvar_t spa_scrub_io_cv; /* scrub I/O completion */ 272 uint8_t spa_scrub_active; /* active or suspended? */ 273 uint8_t spa_scrub_type; /* type of scrub we're doing */ 274 uint8_t spa_scrub_finished; /* indicator to rotate logs */ 275 uint8_t spa_scrub_started; /* started since last boot */ 276 uint8_t spa_scrub_reopen; /* scrub doing vdev_reopen */ 277 uint64_t spa_scan_pass_start; /* start time per pass/reboot */ 278 uint64_t spa_scan_pass_scrub_pause; /* scrub pause time */ 279 uint64_t spa_scan_pass_scrub_spent_paused; /* total paused */ 280 uint64_t spa_scan_pass_exam; /* examined bytes per pass */ 281 kmutex_t spa_async_lock; /* protect async state */ 282 kthread_t *spa_async_thread; /* thread doing async task */ 283 int spa_async_suspended; /* async tasks suspended */ 284 kcondvar_t spa_async_cv; /* wait for thread_exit() */ 285 uint16_t spa_async_tasks; /* async task mask */ 286 uint64_t spa_missing_tvds; /* unopenable tvds on load */ 287 uint64_t spa_missing_tvds_allowed; /* allow loading spa? */ 288 289 spa_removing_phys_t spa_removing_phys; 290 spa_vdev_removal_t *spa_vdev_removal; 291 292 spa_condensing_indirect_phys_t spa_condensing_indirect_phys; 293 spa_condensing_indirect_t *spa_condensing_indirect; 294 zthr_t *spa_condense_zthr; /* zthr doing condense. */ 295 296 uint64_t spa_checkpoint_txg; /* the txg of the checkpoint */ 297 spa_checkpoint_info_t spa_checkpoint_info; /* checkpoint accounting */ 298 zthr_t *spa_checkpoint_discard_zthr; 299 300 char *spa_root; /* alternate root directory */ 301 uint64_t spa_ena; /* spa-wide ereport ENA */ 302 int spa_last_open_failed; /* error if last open failed */ 303 uint64_t spa_last_ubsync_txg; /* "best" uberblock txg */ 304 uint64_t spa_last_ubsync_txg_ts; /* timestamp from that ub */ 305 uint64_t spa_load_txg; /* ub txg that loaded */ 306 uint64_t spa_load_txg_ts; /* timestamp from that ub */ 307 uint64_t spa_load_meta_errors; /* verify metadata err count */ 308 uint64_t spa_load_data_errors; /* verify data err count */ 309 uint64_t spa_verify_min_txg; /* start txg of verify scrub */ 310 kmutex_t spa_errlog_lock; /* error log lock */ 311 uint64_t spa_errlog_last; /* last error log object */ 312 uint64_t spa_errlog_scrub; /* scrub error log object */ 313 kmutex_t spa_errlist_lock; /* error list/ereport lock */ 314 avl_tree_t spa_errlist_last; /* last error list */ 315 avl_tree_t spa_errlist_scrub; /* scrub error list */ 316 uint64_t spa_deflate; /* should we deflate? */ 317 uint64_t spa_history; /* history object */ 318 kmutex_t spa_history_lock; /* history lock */ 319 vdev_t *spa_pending_vdev; /* pending vdev additions */ 320 kmutex_t spa_props_lock; /* property lock */ 321 uint64_t spa_pool_props_object; /* object for properties */ 322 uint64_t spa_bootfs; /* default boot filesystem */ 323 uint64_t spa_failmode; /* failure mode for the pool */ 324 uint64_t spa_delegation; /* delegation on/off */ 325 list_t spa_config_list; /* previous cache file(s) */ 326 /* per-CPU array of root of async I/O: */ 327 zio_t **spa_async_zio_root; 328 zio_t *spa_suspend_zio_root; /* root of all suspended I/O */ 329 zio_t *spa_txg_zio[TXG_SIZE]; /* spa_sync() waits for this */ 330 kmutex_t spa_suspend_lock; /* protects suspend_zio_root */ 331 kcondvar_t spa_suspend_cv; /* notification of resume */ 332 zio_suspend_reason_t spa_suspended; /* pool is suspended */ 333 uint8_t spa_claiming; /* pool is doing zil_claim() */ 334 boolean_t spa_is_root; /* pool is root */ 335 int spa_minref; /* num refs when first opened */ 336 int spa_mode; /* FREAD | FWRITE */ 337 spa_log_state_t spa_log_state; /* log state */ 338 uint64_t spa_autoexpand; /* lun expansion on/off */ 339 uint64_t spa_bootsize; /* efi system partition size */ 340 ddt_t *spa_ddt[ZIO_CHECKSUM_FUNCTIONS]; /* in-core DDTs */ 341 uint64_t spa_ddt_stat_object; /* DDT statistics */ 342 uint64_t spa_dedup_ditto; /* dedup ditto threshold */ 343 uint64_t spa_dedup_checksum; /* default dedup checksum */ 344 uint64_t spa_dspace; /* dspace in normal class */ 345 kmutex_t spa_vdev_top_lock; /* dueling offline/remove */ 346 kmutex_t spa_proc_lock; /* protects spa_proc* */ 347 kcondvar_t spa_proc_cv; /* spa_proc_state transitions */ 348 spa_proc_state_t spa_proc_state; /* see definition */ 349 struct proc *spa_proc; /* "zpool-poolname" process */ 350 uint64_t spa_did; /* if procp != p0, did of t1 */ 351 boolean_t spa_autoreplace; /* autoreplace set in open */ 352 int spa_vdev_locks; /* locks grabbed */ 353 uint64_t spa_creation_version; /* version at pool creation */ 354 uint64_t spa_prev_software_version; /* See ub_software_version */ 355 uint64_t spa_feat_for_write_obj; /* required to write to pool */ 356 uint64_t spa_feat_for_read_obj; /* required to read from pool */ 357 uint64_t spa_feat_desc_obj; /* Feature descriptions */ 358 uint64_t spa_feat_enabled_txg_obj; /* Feature enabled txg */ 359 /* cache feature refcounts */ 360 uint64_t spa_feat_refcount_cache[SPA_FEATURES]; 361 cyclic_id_t spa_deadman_cycid; /* cyclic id */ 362 uint64_t spa_deadman_calls; /* number of deadman calls */ 363 hrtime_t spa_sync_starttime; /* starting time fo spa_sync */ 364 uint64_t spa_deadman_synctime; /* deadman expiration timer */ 365 uint64_t spa_all_vdev_zaps; /* ZAP of per-vd ZAP obj #s */ 366 spa_avz_action_t spa_avz_action; /* destroy/rebuild AVZ? */ 367 368 /* 369 * spa_iokstat_lock protects spa_iokstat and 370 * spa_queue_stats[]. 371 */ 372 kmutex_t spa_iokstat_lock; 373 struct kstat *spa_iokstat; /* kstat of io to this pool */ 374 struct { 375 int spa_active; 376 int spa_queued; 377 } spa_queue_stats[ZIO_PRIORITY_NUM_QUEUEABLE]; 378 379 /* arc_memory_throttle() parameters during low memory condition */ 380 uint64_t spa_lowmem_page_load; /* memory load during txg */ 381 uint64_t spa_lowmem_last_txg; /* txg window start */ 382 383 hrtime_t spa_ccw_fail_time; /* Conf cache write fail time */ 384 385 uint64_t spa_multihost; /* multihost aware (mmp) */ 386 mmp_thread_t spa_mmp; /* multihost mmp thread */ 387 list_t spa_leaf_list; /* list of leaf vdevs */ 388 uint64_t spa_leaf_list_gen; /* track leaf_list changes */ 389 390 /* 391 * spa_refcount & spa_config_lock must be the last elements 392 * because refcount_t changes size based on compilation options. 393 * because zfs_refcount_t changes size based on compilation options. 394 * In order for the MDB module to function correctly, the other 395 * fields must remain in the same location. 396 */ 397 spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */ 398 zfs_refcount_t spa_refcount; /* number of opens */ 399 }; 400 401 extern const char *spa_config_path; 402 403 extern void spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q, 404 task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent); 405 extern void spa_load_spares(spa_t *spa); 406 extern void spa_load_l2cache(spa_t *spa); 407 408 #ifdef __cplusplus 409 } 410 #endif 411 412 #endif /* _SYS_SPA_IMPL_H */ 413