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, 2015 by Delphix. All rights reserved. 24 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 25 * Copyright 2013 Martin Matuska <mm@FreeBSD.org>. All rights reserved. 26 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 27 * Copyright 2013 Saso Kiselkov. All rights reserved. 28 */ 29 30 #ifndef _SYS_SPA_IMPL_H 31 #define _SYS_SPA_IMPL_H 32 33 #include <sys/spa.h> 34 #include <sys/vdev.h> 35 #include <sys/metaslab.h> 36 #include <sys/dmu.h> 37 #include <sys/dsl_pool.h> 38 #include <sys/uberblock_impl.h> 39 #include <sys/zfs_context.h> 40 #include <sys/avl.h> 41 #include <sys/refcount.h> 42 #include <sys/bplist.h> 43 #include <sys/bpobj.h> 44 #include <sys/zfeature.h> 45 #include <zfeature_common.h> 46 47 #if defined(__NetBSD__) && defined(_KERNEL) 48 #include <sys/workqueue.h> 49 #endif 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 struct spa_aux_vdev { 70 uint64_t sav_object; /* MOS object for device list */ 71 nvlist_t *sav_config; /* cached device config */ 72 vdev_t **sav_vdevs; /* devices */ 73 int sav_count; /* number devices */ 74 boolean_t sav_sync; /* sync the device list */ 75 nvlist_t **sav_pending; /* pending device additions */ 76 uint_t sav_npending; /* # pending devices */ 77 }; 78 79 typedef struct spa_config_lock { 80 kmutex_t scl_lock; 81 kthread_t *scl_writer; 82 int scl_write_wanted; 83 kcondvar_t scl_cv; 84 refcount_t scl_count; 85 } spa_config_lock_t; 86 87 typedef struct spa_config_dirent { 88 list_node_t scd_link; 89 char *scd_path; 90 } spa_config_dirent_t; 91 92 typedef enum zio_taskq_type { 93 ZIO_TASKQ_ISSUE = 0, 94 ZIO_TASKQ_ISSUE_HIGH, 95 ZIO_TASKQ_INTERRUPT, 96 ZIO_TASKQ_INTERRUPT_HIGH, 97 ZIO_TASKQ_TYPES 98 } zio_taskq_type_t; 99 100 /* 101 * State machine for the zpool-poolname process. The states transitions 102 * are done as follows: 103 * 104 * From To Routine 105 * PROC_NONE -> PROC_CREATED spa_activate() 106 * PROC_CREATED -> PROC_ACTIVE spa_thread() 107 * PROC_ACTIVE -> PROC_DEACTIVATE spa_deactivate() 108 * PROC_DEACTIVATE -> PROC_GONE spa_thread() 109 * PROC_GONE -> PROC_NONE spa_deactivate() 110 */ 111 typedef enum spa_proc_state { 112 SPA_PROC_NONE, /* spa_proc = &p0, no process created */ 113 SPA_PROC_CREATED, /* spa_activate() has proc, is waiting */ 114 SPA_PROC_ACTIVE, /* taskqs created, spa_proc set */ 115 SPA_PROC_DEACTIVATE, /* spa_deactivate() requests process exit */ 116 SPA_PROC_GONE /* spa_thread() is exiting, spa_proc = &p0 */ 117 } spa_proc_state_t; 118 119 typedef struct spa_taskqs { 120 uint_t stqs_count; 121 taskq_t **stqs_taskq; 122 } spa_taskqs_t; 123 124 typedef enum spa_all_vdev_zap_action { 125 AVZ_ACTION_NONE = 0, 126 AVZ_ACTION_DESTROY, /* Destroy all per-vdev ZAPs and the AVZ. */ 127 AVZ_ACTION_REBUILD /* Populate the new AVZ, see spa_avz_rebuild */ 128 } spa_avz_action_t; 129 130 struct spa { 131 /* 132 * Fields protected by spa_namespace_lock. 133 */ 134 char spa_name[ZFS_MAX_DATASET_NAME_LEN]; /* pool name */ 135 char *spa_comment; /* comment */ 136 avl_node_t spa_avl; /* node in spa_namespace_avl */ 137 nvlist_t *spa_config; /* last synced config */ 138 nvlist_t *spa_config_syncing; /* currently syncing config */ 139 nvlist_t *spa_config_splitting; /* config for splitting */ 140 nvlist_t *spa_load_info; /* info and errors from load */ 141 uint64_t spa_config_txg; /* txg of last config change */ 142 int spa_sync_pass; /* iterate-to-convergence */ 143 pool_state_t spa_state; /* pool state */ 144 int spa_inject_ref; /* injection references */ 145 uint8_t spa_sync_on; /* sync threads are running */ 146 spa_load_state_t spa_load_state; /* current load operation */ 147 uint64_t spa_import_flags; /* import specific flags */ 148 spa_taskqs_t spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES]; 149 dsl_pool_t *spa_dsl_pool; 150 boolean_t spa_is_initializing; /* true while opening pool */ 151 metaslab_class_t *spa_normal_class; /* normal data class */ 152 metaslab_class_t *spa_log_class; /* intent log data class */ 153 uint64_t spa_first_txg; /* first txg after spa_open() */ 154 uint64_t spa_final_txg; /* txg of export/destroy */ 155 uint64_t spa_freeze_txg; /* freeze pool at this txg */ 156 uint64_t spa_load_max_txg; /* best initial ub_txg */ 157 uint64_t spa_claim_max_txg; /* highest claimed birth txg */ 158 timespec_t spa_loaded_ts; /* 1st successful open time */ 159 objset_t *spa_meta_objset; /* copy of dp->dp_meta_objset */ 160 kmutex_t spa_evicting_os_lock; /* Evicting objset list lock */ 161 list_t spa_evicting_os_list; /* Objsets being evicted. */ 162 kcondvar_t spa_evicting_os_cv; /* Objset Eviction Completion */ 163 txg_list_t spa_vdev_txg_list; /* per-txg dirty vdev list */ 164 vdev_t *spa_root_vdev; /* top-level vdev container */ 165 int spa_min_ashift; /* of vdevs in normal class */ 166 int spa_max_ashift; /* of vdevs in normal class */ 167 uint64_t spa_config_guid; /* config pool guid */ 168 uint64_t spa_load_guid; /* spa_load initialized guid */ 169 uint64_t spa_last_synced_guid; /* last synced guid */ 170 list_t spa_config_dirty_list; /* vdevs with dirty config */ 171 list_t spa_state_dirty_list; /* vdevs with dirty state */ 172 kmutex_t spa_alloc_lock; 173 avl_tree_t spa_alloc_tree; 174 spa_aux_vdev_t spa_spares; /* hot spares */ 175 spa_aux_vdev_t spa_l2cache; /* L2ARC cache devices */ 176 nvlist_t *spa_label_features; /* Features for reading MOS */ 177 uint64_t spa_config_object; /* MOS object for pool config */ 178 uint64_t spa_config_generation; /* config generation number */ 179 uint64_t spa_syncing_txg; /* txg currently syncing */ 180 bpobj_t spa_deferred_bpobj; /* deferred-free bplist */ 181 bplist_t spa_free_bplist[TXG_SIZE]; /* bplist of stuff to free */ 182 zio_cksum_salt_t spa_cksum_salt; /* secret salt for cksum */ 183 /* checksum context templates */ 184 kmutex_t spa_cksum_tmpls_lock; 185 void *spa_cksum_tmpls[ZIO_CHECKSUM_FUNCTIONS]; 186 uberblock_t spa_ubsync; /* last synced uberblock */ 187 uberblock_t spa_uberblock; /* current uberblock */ 188 boolean_t spa_extreme_rewind; /* rewind past deferred frees */ 189 uint64_t spa_last_io; /* lbolt of last non-scan I/O */ 190 kmutex_t spa_scrub_lock; /* resilver/scrub lock */ 191 uint64_t spa_scrub_inflight; /* in-flight scrub I/Os */ 192 kcondvar_t spa_scrub_io_cv; /* scrub I/O completion */ 193 uint8_t spa_scrub_active; /* active or suspended? */ 194 uint8_t spa_scrub_type; /* type of scrub we're doing */ 195 uint8_t spa_scrub_finished; /* indicator to rotate logs */ 196 uint8_t spa_scrub_started; /* started since last boot */ 197 uint8_t spa_scrub_reopen; /* scrub doing vdev_reopen */ 198 uint64_t spa_scan_pass_start; /* start time per pass/reboot */ 199 uint64_t spa_scan_pass_exam; /* examined bytes per pass */ 200 kmutex_t spa_async_lock; /* protect async state */ 201 kthread_t *spa_async_thread; /* thread doing async task */ 202 kthread_t *spa_async_thread_vd; /* thread doing vd async task */ 203 int spa_async_suspended; /* async tasks suspended */ 204 kcondvar_t spa_async_cv; /* wait for thread_exit() */ 205 uint16_t spa_async_tasks; /* async task mask */ 206 char *spa_root; /* alternate root directory */ 207 uint64_t spa_ena; /* spa-wide ereport ENA */ 208 int spa_last_open_failed; /* error if last open failed */ 209 uint64_t spa_last_ubsync_txg; /* "best" uberblock txg */ 210 uint64_t spa_last_ubsync_txg_ts; /* timestamp from that ub */ 211 uint64_t spa_load_txg; /* ub txg that loaded */ 212 uint64_t spa_load_txg_ts; /* timestamp from that ub */ 213 uint64_t spa_load_meta_errors; /* verify metadata err count */ 214 uint64_t spa_load_data_errors; /* verify data err count */ 215 uint64_t spa_verify_min_txg; /* start txg of verify scrub */ 216 kmutex_t spa_errlog_lock; /* error log lock */ 217 uint64_t spa_errlog_last; /* last error log object */ 218 uint64_t spa_errlog_scrub; /* scrub error log object */ 219 kmutex_t spa_errlist_lock; /* error list/ereport lock */ 220 avl_tree_t spa_errlist_last; /* last error list */ 221 avl_tree_t spa_errlist_scrub; /* scrub error list */ 222 uint64_t spa_deflate; /* should we deflate? */ 223 uint64_t spa_history; /* history object */ 224 kmutex_t spa_history_lock; /* history lock */ 225 vdev_t *spa_pending_vdev; /* pending vdev additions */ 226 kmutex_t spa_props_lock; /* property lock */ 227 uint64_t spa_pool_props_object; /* object for properties */ 228 uint64_t spa_bootfs; /* default boot filesystem */ 229 uint64_t spa_failmode; /* failure mode for the pool */ 230 uint64_t spa_delegation; /* delegation on/off */ 231 list_t spa_config_list; /* previous cache file(s) */ 232 /* per-CPU array of root of async I/O: */ 233 zio_t **spa_async_zio_root; 234 zio_t *spa_suspend_zio_root; /* root of all suspended I/O */ 235 kmutex_t spa_suspend_lock; /* protects suspend_zio_root */ 236 kcondvar_t spa_suspend_cv; /* notification of resume */ 237 uint8_t spa_suspended; /* pool is suspended */ 238 uint8_t spa_claiming; /* pool is doing zil_claim() */ 239 boolean_t spa_debug; /* debug enabled? */ 240 boolean_t spa_is_root; /* pool is root */ 241 int spa_minref; /* num refs when first opened */ 242 int spa_mode; /* FREAD | FWRITE */ 243 spa_log_state_t spa_log_state; /* log state */ 244 uint64_t spa_autoexpand; /* lun expansion on/off */ 245 ddt_t *spa_ddt[ZIO_CHECKSUM_FUNCTIONS]; /* in-core DDTs */ 246 uint64_t spa_ddt_stat_object; /* DDT statistics */ 247 uint64_t spa_dedup_ditto; /* dedup ditto threshold */ 248 uint64_t spa_dedup_checksum; /* default dedup checksum */ 249 uint64_t spa_dspace; /* dspace in normal class */ 250 kmutex_t spa_vdev_top_lock; /* dueling offline/remove */ 251 kmutex_t spa_proc_lock; /* protects spa_proc* */ 252 kcondvar_t spa_proc_cv; /* spa_proc_state transitions */ 253 spa_proc_state_t spa_proc_state; /* see definition */ 254 struct proc *spa_proc; /* "zpool-poolname" process */ 255 uint64_t spa_did; /* if procp != p0, did of t1 */ 256 kthread_t *spa_trim_thread; /* thread sending TRIM I/Os */ 257 kmutex_t spa_trim_lock; /* protects spa_trim_cv */ 258 kcondvar_t spa_trim_cv; /* used to notify TRIM thread */ 259 boolean_t spa_autoreplace; /* autoreplace set in open */ 260 int spa_vdev_locks; /* locks grabbed */ 261 uint64_t spa_creation_version; /* version at pool creation */ 262 uint64_t spa_prev_software_version; /* See ub_software_version */ 263 uint64_t spa_feat_for_write_obj; /* required to write to pool */ 264 uint64_t spa_feat_for_read_obj; /* required to read from pool */ 265 uint64_t spa_feat_desc_obj; /* Feature descriptions */ 266 uint64_t spa_feat_enabled_txg_obj; /* Feature enabled txg */ 267 /* cache feature refcounts */ 268 uint64_t spa_feat_refcount_cache[SPA_FEATURES]; 269 #ifdef illumos 270 cyclic_id_t spa_deadman_cycid; /* cyclic id */ 271 #endif /* illumos */ 272 #ifdef __FreeBSD__ 273 #ifdef _KERNEL 274 struct callout spa_deadman_cycid; /* callout id */ 275 struct task spa_deadman_task; 276 #endif 277 #endif /* __FreeBSD__ */ 278 #ifdef __NetBSD__ 279 #ifdef _KERNEL 280 struct callout spa_deadman_cycid; /* callout id */ 281 struct work spa_deadman_work; 282 #endif 283 #endif /* __NetBSD__ */ 284 uint64_t spa_deadman_calls; /* number of deadman calls */ 285 hrtime_t spa_sync_starttime; /* starting time fo spa_sync */ 286 uint64_t spa_deadman_synctime; /* deadman expiration timer */ 287 uint64_t spa_all_vdev_zaps; /* ZAP of per-vd ZAP obj #s */ 288 spa_avz_action_t spa_avz_action; /* destroy/rebuild AVZ? */ 289 290 #ifdef illumos 291 /* 292 * spa_iokstat_lock protects spa_iokstat and 293 * spa_queue_stats[]. 294 */ 295 kmutex_t spa_iokstat_lock; 296 struct kstat *spa_iokstat; /* kstat of io to this pool */ 297 struct { 298 int spa_active; 299 int spa_queued; 300 } spa_queue_stats[ZIO_PRIORITY_NUM_QUEUEABLE]; 301 #endif 302 hrtime_t spa_ccw_fail_time; /* Conf cache write fail time */ 303 304 /* 305 * spa_refcount & spa_config_lock must be the last elements 306 * because refcount_t changes size based on compilation options. 307 * In order for the MDB module to function correctly, the other 308 * fields must remain in the same location. 309 */ 310 spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */ 311 refcount_t spa_refcount; /* number of opens */ 312 #ifndef illumos 313 boolean_t spa_splitting_newspa; /* creating new spa in split */ 314 #endif 315 }; 316 317 extern const char *spa_config_path; 318 319 extern void spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q, 320 task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent); 321 322 #ifdef __cplusplus 323 } 324 #endif 325 326 #endif /* _SYS_SPA_IMPL_H */ 327