spa_impl.h revision 288549
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 */ 28 29#ifndef _SYS_SPA_IMPL_H 30#define _SYS_SPA_IMPL_H 31 32#include <sys/spa.h> 33#include <sys/vdev.h> 34#include <sys/metaslab.h> 35#include <sys/dmu.h> 36#include <sys/dsl_pool.h> 37#include <sys/uberblock_impl.h> 38#include <sys/zfs_context.h> 39#include <sys/avl.h> 40#include <sys/refcount.h> 41#include <sys/bplist.h> 42#include <sys/bpobj.h> 43#include <sys/zfeature.h> 44#include <zfeature_common.h> 45 46#ifdef __cplusplus 47extern "C" { 48#endif 49 50typedef struct spa_error_entry { 51 zbookmark_phys_t se_bookmark; 52 char *se_name; 53 avl_node_t se_avl; 54} spa_error_entry_t; 55 56typedef struct spa_history_phys { 57 uint64_t sh_pool_create_len; /* ending offset of zpool create */ 58 uint64_t sh_phys_max_off; /* physical EOF */ 59 uint64_t sh_bof; /* logical BOF */ 60 uint64_t sh_eof; /* logical EOF */ 61 uint64_t sh_records_lost; /* num of records overwritten */ 62} spa_history_phys_t; 63 64struct spa_aux_vdev { 65 uint64_t sav_object; /* MOS object for device list */ 66 nvlist_t *sav_config; /* cached device config */ 67 vdev_t **sav_vdevs; /* devices */ 68 int sav_count; /* number devices */ 69 boolean_t sav_sync; /* sync the device list */ 70 nvlist_t **sav_pending; /* pending device additions */ 71 uint_t sav_npending; /* # pending devices */ 72}; 73 74typedef struct spa_config_lock { 75 kmutex_t scl_lock; 76 kthread_t *scl_writer; 77 int scl_write_wanted; 78 kcondvar_t scl_cv; 79 refcount_t scl_count; 80} spa_config_lock_t; 81 82typedef struct spa_config_dirent { 83 list_node_t scd_link; 84 char *scd_path; 85} spa_config_dirent_t; 86 87typedef enum zio_taskq_type { 88 ZIO_TASKQ_ISSUE = 0, 89 ZIO_TASKQ_ISSUE_HIGH, 90 ZIO_TASKQ_INTERRUPT, 91 ZIO_TASKQ_INTERRUPT_HIGH, 92 ZIO_TASKQ_TYPES 93} zio_taskq_type_t; 94 95/* 96 * State machine for the zpool-poolname process. The states transitions 97 * are done as follows: 98 * 99 * From To Routine 100 * PROC_NONE -> PROC_CREATED spa_activate() 101 * PROC_CREATED -> PROC_ACTIVE spa_thread() 102 * PROC_ACTIVE -> PROC_DEACTIVATE spa_deactivate() 103 * PROC_DEACTIVATE -> PROC_GONE spa_thread() 104 * PROC_GONE -> PROC_NONE spa_deactivate() 105 */ 106typedef enum spa_proc_state { 107 SPA_PROC_NONE, /* spa_proc = &p0, no process created */ 108 SPA_PROC_CREATED, /* spa_activate() has proc, is waiting */ 109 SPA_PROC_ACTIVE, /* taskqs created, spa_proc set */ 110 SPA_PROC_DEACTIVATE, /* spa_deactivate() requests process exit */ 111 SPA_PROC_GONE /* spa_thread() is exiting, spa_proc = &p0 */ 112} spa_proc_state_t; 113 114typedef struct spa_taskqs { 115 uint_t stqs_count; 116 taskq_t **stqs_taskq; 117} spa_taskqs_t; 118 119struct spa { 120 /* 121 * Fields protected by spa_namespace_lock. 122 */ 123 char spa_name[MAXNAMELEN]; /* pool name */ 124 char *spa_comment; /* comment */ 125 avl_node_t spa_avl; /* node in spa_namespace_avl */ 126 nvlist_t *spa_config; /* last synced config */ 127 nvlist_t *spa_config_syncing; /* currently syncing config */ 128 nvlist_t *spa_config_splitting; /* config for splitting */ 129 nvlist_t *spa_load_info; /* info and errors from load */ 130 uint64_t spa_config_txg; /* txg of last config change */ 131 int spa_sync_pass; /* iterate-to-convergence */ 132 pool_state_t spa_state; /* pool state */ 133 int spa_inject_ref; /* injection references */ 134 uint8_t spa_sync_on; /* sync threads are running */ 135 spa_load_state_t spa_load_state; /* current load operation */ 136 uint64_t spa_import_flags; /* import specific flags */ 137 spa_taskqs_t spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES]; 138 dsl_pool_t *spa_dsl_pool; 139 boolean_t spa_is_initializing; /* true while opening pool */ 140 metaslab_class_t *spa_normal_class; /* normal data class */ 141 metaslab_class_t *spa_log_class; /* intent log data class */ 142 uint64_t spa_first_txg; /* first txg after spa_open() */ 143 uint64_t spa_final_txg; /* txg of export/destroy */ 144 uint64_t spa_freeze_txg; /* freeze pool at this txg */ 145 uint64_t spa_load_max_txg; /* best initial ub_txg */ 146 uint64_t spa_claim_max_txg; /* highest claimed birth txg */ 147 timespec_t spa_loaded_ts; /* 1st successful open time */ 148 objset_t *spa_meta_objset; /* copy of dp->dp_meta_objset */ 149 kmutex_t spa_evicting_os_lock; /* Evicting objset list lock */ 150 list_t spa_evicting_os_list; /* Objsets being evicted. */ 151 kcondvar_t spa_evicting_os_cv; /* Objset Eviction Completion */ 152 txg_list_t spa_vdev_txg_list; /* per-txg dirty vdev list */ 153 vdev_t *spa_root_vdev; /* top-level vdev container */ 154 int spa_min_ashift; /* of vdevs in normal class */ 155 int spa_max_ashift; /* of vdevs in normal class */ 156 uint64_t spa_config_guid; /* config pool guid */ 157 uint64_t spa_load_guid; /* spa_load initialized guid */ 158 uint64_t spa_last_synced_guid; /* last synced guid */ 159 list_t spa_config_dirty_list; /* vdevs with dirty config */ 160 list_t spa_state_dirty_list; /* vdevs with dirty state */ 161 spa_aux_vdev_t spa_spares; /* hot spares */ 162 spa_aux_vdev_t spa_l2cache; /* L2ARC cache devices */ 163 nvlist_t *spa_label_features; /* Features for reading MOS */ 164 uint64_t spa_config_object; /* MOS object for pool config */ 165 uint64_t spa_config_generation; /* config generation number */ 166 uint64_t spa_syncing_txg; /* txg currently syncing */ 167 bpobj_t spa_deferred_bpobj; /* deferred-free bplist */ 168 bplist_t spa_free_bplist[TXG_SIZE]; /* bplist of stuff to free */ 169 uberblock_t spa_ubsync; /* last synced uberblock */ 170 uberblock_t spa_uberblock; /* current uberblock */ 171 boolean_t spa_extreme_rewind; /* rewind past deferred frees */ 172 uint64_t spa_last_io; /* lbolt of last non-scan I/O */ 173 kmutex_t spa_scrub_lock; /* resilver/scrub lock */ 174 uint64_t spa_scrub_inflight; /* in-flight scrub I/Os */ 175 kcondvar_t spa_scrub_io_cv; /* scrub I/O completion */ 176 uint8_t spa_scrub_active; /* active or suspended? */ 177 uint8_t spa_scrub_type; /* type of scrub we're doing */ 178 uint8_t spa_scrub_finished; /* indicator to rotate logs */ 179 uint8_t spa_scrub_started; /* started since last boot */ 180 uint8_t spa_scrub_reopen; /* scrub doing vdev_reopen */ 181 uint64_t spa_scan_pass_start; /* start time per pass/reboot */ 182 uint64_t spa_scan_pass_exam; /* examined bytes per pass */ 183 kmutex_t spa_async_lock; /* protect async state */ 184 kthread_t *spa_async_thread; /* thread doing async task */ 185 kthread_t *spa_async_thread_vd; /* thread doing vd async task */ 186 int spa_async_suspended; /* async tasks suspended */ 187 kcondvar_t spa_async_cv; /* wait for thread_exit() */ 188 uint16_t spa_async_tasks; /* async task mask */ 189 char *spa_root; /* alternate root directory */ 190 uint64_t spa_ena; /* spa-wide ereport ENA */ 191 int spa_last_open_failed; /* error if last open failed */ 192 uint64_t spa_last_ubsync_txg; /* "best" uberblock txg */ 193 uint64_t spa_last_ubsync_txg_ts; /* timestamp from that ub */ 194 uint64_t spa_load_txg; /* ub txg that loaded */ 195 uint64_t spa_load_txg_ts; /* timestamp from that ub */ 196 uint64_t spa_load_meta_errors; /* verify metadata err count */ 197 uint64_t spa_load_data_errors; /* verify data err count */ 198 uint64_t spa_verify_min_txg; /* start txg of verify scrub */ 199 kmutex_t spa_errlog_lock; /* error log lock */ 200 uint64_t spa_errlog_last; /* last error log object */ 201 uint64_t spa_errlog_scrub; /* scrub error log object */ 202 kmutex_t spa_errlist_lock; /* error list/ereport lock */ 203 avl_tree_t spa_errlist_last; /* last error list */ 204 avl_tree_t spa_errlist_scrub; /* scrub error list */ 205 uint64_t spa_deflate; /* should we deflate? */ 206 uint64_t spa_history; /* history object */ 207 kmutex_t spa_history_lock; /* history lock */ 208 vdev_t *spa_pending_vdev; /* pending vdev additions */ 209 kmutex_t spa_props_lock; /* property lock */ 210 uint64_t spa_pool_props_object; /* object for properties */ 211 uint64_t spa_bootfs; /* default boot filesystem */ 212 uint64_t spa_failmode; /* failure mode for the pool */ 213 uint64_t spa_delegation; /* delegation on/off */ 214 list_t spa_config_list; /* previous cache file(s) */ 215 /* per-CPU array of root of async I/O: */ 216 zio_t **spa_async_zio_root; 217 zio_t *spa_suspend_zio_root; /* root of all suspended I/O */ 218 kmutex_t spa_suspend_lock; /* protects suspend_zio_root */ 219 kcondvar_t spa_suspend_cv; /* notification of resume */ 220 uint8_t spa_suspended; /* pool is suspended */ 221 uint8_t spa_claiming; /* pool is doing zil_claim() */ 222 boolean_t spa_debug; /* debug enabled? */ 223 boolean_t spa_is_root; /* pool is root */ 224 int spa_minref; /* num refs when first opened */ 225 int spa_mode; /* FREAD | FWRITE */ 226 spa_log_state_t spa_log_state; /* log state */ 227 uint64_t spa_autoexpand; /* lun expansion on/off */ 228 ddt_t *spa_ddt[ZIO_CHECKSUM_FUNCTIONS]; /* in-core DDTs */ 229 uint64_t spa_ddt_stat_object; /* DDT statistics */ 230 uint64_t spa_dedup_ditto; /* dedup ditto threshold */ 231 uint64_t spa_dedup_checksum; /* default dedup checksum */ 232 uint64_t spa_dspace; /* dspace in normal class */ 233 kmutex_t spa_vdev_top_lock; /* dueling offline/remove */ 234 kmutex_t spa_proc_lock; /* protects spa_proc* */ 235 kcondvar_t spa_proc_cv; /* spa_proc_state transitions */ 236 spa_proc_state_t spa_proc_state; /* see definition */ 237 struct proc *spa_proc; /* "zpool-poolname" process */ 238 uint64_t spa_did; /* if procp != p0, did of t1 */ 239 kthread_t *spa_trim_thread; /* thread sending TRIM I/Os */ 240 kmutex_t spa_trim_lock; /* protects spa_trim_cv */ 241 kcondvar_t spa_trim_cv; /* used to notify TRIM thread */ 242 boolean_t spa_autoreplace; /* autoreplace set in open */ 243 int spa_vdev_locks; /* locks grabbed */ 244 uint64_t spa_creation_version; /* version at pool creation */ 245 uint64_t spa_prev_software_version; /* See ub_software_version */ 246 uint64_t spa_feat_for_write_obj; /* required to write to pool */ 247 uint64_t spa_feat_for_read_obj; /* required to read from pool */ 248 uint64_t spa_feat_desc_obj; /* Feature descriptions */ 249 uint64_t spa_feat_enabled_txg_obj; /* Feature enabled txg */ 250 /* cache feature refcounts */ 251 uint64_t spa_feat_refcount_cache[SPA_FEATURES]; 252#ifdef illumos 253 cyclic_id_t spa_deadman_cycid; /* cyclic id */ 254#else /* FreeBSD */ 255#ifdef _KERNEL 256 struct callout spa_deadman_cycid; /* callout id */ 257#endif 258#endif /* illumos */ 259 uint64_t spa_deadman_calls; /* number of deadman calls */ 260 hrtime_t spa_sync_starttime; /* starting time fo spa_sync */ 261 uint64_t spa_deadman_synctime; /* deadman expiration timer */ 262#ifdef illumos 263 /* 264 * spa_iokstat_lock protects spa_iokstat and 265 * spa_queue_stats[]. 266 */ 267 kmutex_t spa_iokstat_lock; 268 struct kstat *spa_iokstat; /* kstat of io to this pool */ 269 struct { 270 int spa_active; 271 int spa_queued; 272 } spa_queue_stats[ZIO_PRIORITY_NUM_QUEUEABLE]; 273#endif 274 hrtime_t spa_ccw_fail_time; /* Conf cache write fail time */ 275 276 /* 277 * spa_refcount & spa_config_lock must be the last elements 278 * because refcount_t changes size based on compilation options. 279 * In order for the MDB module to function correctly, the other 280 * fields must remain in the same location. 281 */ 282 spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */ 283 refcount_t spa_refcount; /* number of opens */ 284#ifndef sun 285 boolean_t spa_splitting_newspa; /* creating new spa in split */ 286#endif 287}; 288 289extern const char *spa_config_path; 290 291extern void spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q, 292 task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent); 293 294#ifdef __cplusplus 295} 296#endif 297 298#endif /* _SYS_SPA_IMPL_H */ 299