spa_impl.h revision 263397
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) 2013 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 */ 27 28#ifndef _SYS_SPA_IMPL_H 29#define _SYS_SPA_IMPL_H 30 31#include <sys/spa.h> 32#include <sys/vdev.h> 33#include <sys/metaslab.h> 34#include <sys/dmu.h> 35#include <sys/dsl_pool.h> 36#include <sys/uberblock_impl.h> 37#include <sys/zfs_context.h> 38#include <sys/avl.h> 39#include <sys/refcount.h> 40#include <sys/bplist.h> 41#include <sys/bpobj.h> 42#include <zfeature_common.h> 43 44#ifdef __cplusplus 45extern "C" { 46#endif 47 48typedef struct spa_error_entry { 49 zbookmark_t se_bookmark; 50 char *se_name; 51 avl_node_t se_avl; 52} spa_error_entry_t; 53 54typedef struct spa_history_phys { 55 uint64_t sh_pool_create_len; /* ending offset of zpool create */ 56 uint64_t sh_phys_max_off; /* physical EOF */ 57 uint64_t sh_bof; /* logical BOF */ 58 uint64_t sh_eof; /* logical EOF */ 59 uint64_t sh_records_lost; /* num of records overwritten */ 60} spa_history_phys_t; 61 62struct spa_aux_vdev { 63 uint64_t sav_object; /* MOS object for device list */ 64 nvlist_t *sav_config; /* cached device config */ 65 vdev_t **sav_vdevs; /* devices */ 66 int sav_count; /* number devices */ 67 boolean_t sav_sync; /* sync the device list */ 68 nvlist_t **sav_pending; /* pending device additions */ 69 uint_t sav_npending; /* # pending devices */ 70}; 71 72typedef struct spa_config_lock { 73 kmutex_t scl_lock; 74 kthread_t *scl_writer; 75 int scl_write_wanted; 76 kcondvar_t scl_cv; 77 refcount_t scl_count; 78} spa_config_lock_t; 79 80typedef struct spa_config_dirent { 81 list_node_t scd_link; 82 char *scd_path; 83} spa_config_dirent_t; 84 85typedef enum zio_taskq_type { 86 ZIO_TASKQ_ISSUE = 0, 87 ZIO_TASKQ_ISSUE_HIGH, 88 ZIO_TASKQ_INTERRUPT, 89 ZIO_TASKQ_INTERRUPT_HIGH, 90 ZIO_TASKQ_TYPES 91} zio_taskq_type_t; 92 93/* 94 * State machine for the zpool-poolname process. The states transitions 95 * are done as follows: 96 * 97 * From To Routine 98 * PROC_NONE -> PROC_CREATED spa_activate() 99 * PROC_CREATED -> PROC_ACTIVE spa_thread() 100 * PROC_ACTIVE -> PROC_DEACTIVATE spa_deactivate() 101 * PROC_DEACTIVATE -> PROC_GONE spa_thread() 102 * PROC_GONE -> PROC_NONE spa_deactivate() 103 */ 104typedef enum spa_proc_state { 105 SPA_PROC_NONE, /* spa_proc = &p0, no process created */ 106 SPA_PROC_CREATED, /* spa_activate() has proc, is waiting */ 107 SPA_PROC_ACTIVE, /* taskqs created, spa_proc set */ 108 SPA_PROC_DEACTIVATE, /* spa_deactivate() requests process exit */ 109 SPA_PROC_GONE /* spa_thread() is exiting, spa_proc = &p0 */ 110} spa_proc_state_t; 111 112typedef struct spa_taskqs { 113 uint_t stqs_count; 114 taskq_t **stqs_taskq; 115} spa_taskqs_t; 116 117struct spa { 118 /* 119 * Fields protected by spa_namespace_lock. 120 */ 121 char spa_name[MAXNAMELEN]; /* pool name */ 122 char *spa_comment; /* comment */ 123 avl_node_t spa_avl; /* node in spa_namespace_avl */ 124 nvlist_t *spa_config; /* last synced config */ 125 nvlist_t *spa_config_syncing; /* currently syncing config */ 126 nvlist_t *spa_config_splitting; /* config for splitting */ 127 nvlist_t *spa_load_info; /* info and errors from load */ 128 uint64_t spa_config_txg; /* txg of last config change */ 129 int spa_sync_pass; /* iterate-to-convergence */ 130 pool_state_t spa_state; /* pool state */ 131 int spa_inject_ref; /* injection references */ 132 uint8_t spa_sync_on; /* sync threads are running */ 133 spa_load_state_t spa_load_state; /* current load operation */ 134 uint64_t spa_import_flags; /* import specific flags */ 135 spa_taskqs_t spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES]; 136 dsl_pool_t *spa_dsl_pool; 137 boolean_t spa_is_initializing; /* true while opening pool */ 138 metaslab_class_t *spa_normal_class; /* normal data class */ 139 metaslab_class_t *spa_log_class; /* intent log data class */ 140 uint64_t spa_first_txg; /* first txg after spa_open() */ 141 uint64_t spa_final_txg; /* txg of export/destroy */ 142 uint64_t spa_freeze_txg; /* freeze pool at this txg */ 143 uint64_t spa_load_max_txg; /* best initial ub_txg */ 144 uint64_t spa_claim_max_txg; /* highest claimed birth txg */ 145 timespec_t spa_loaded_ts; /* 1st successful open time */ 146 objset_t *spa_meta_objset; /* copy of dp->dp_meta_objset */ 147 txg_list_t spa_vdev_txg_list; /* per-txg dirty vdev list */ 148 vdev_t *spa_root_vdev; /* top-level vdev container */ 149 uint64_t spa_config_guid; /* config pool guid */ 150 uint64_t spa_load_guid; /* spa_load initialized guid */ 151 uint64_t spa_last_synced_guid; /* last synced guid */ 152 list_t spa_config_dirty_list; /* vdevs with dirty config */ 153 list_t spa_state_dirty_list; /* vdevs with dirty state */ 154 spa_aux_vdev_t spa_spares; /* hot spares */ 155 spa_aux_vdev_t spa_l2cache; /* L2ARC cache devices */ 156 nvlist_t *spa_label_features; /* Features for reading MOS */ 157 uint64_t spa_config_object; /* MOS object for pool config */ 158 uint64_t spa_config_generation; /* config generation number */ 159 uint64_t spa_syncing_txg; /* txg currently syncing */ 160 bpobj_t spa_deferred_bpobj; /* deferred-free bplist */ 161 bplist_t spa_free_bplist[TXG_SIZE]; /* bplist of stuff to free */ 162 uberblock_t spa_ubsync; /* last synced uberblock */ 163 uberblock_t spa_uberblock; /* current uberblock */ 164 boolean_t spa_extreme_rewind; /* rewind past deferred frees */ 165 uint64_t spa_last_io; /* lbolt of last non-scan I/O */ 166 kmutex_t spa_scrub_lock; /* resilver/scrub lock */ 167 uint64_t spa_scrub_inflight; /* in-flight scrub I/Os */ 168 kcondvar_t spa_scrub_io_cv; /* scrub I/O completion */ 169 uint8_t spa_scrub_active; /* active or suspended? */ 170 uint8_t spa_scrub_type; /* type of scrub we're doing */ 171 uint8_t spa_scrub_finished; /* indicator to rotate logs */ 172 uint8_t spa_scrub_started; /* started since last boot */ 173 uint8_t spa_scrub_reopen; /* scrub doing vdev_reopen */ 174 uint64_t spa_scan_pass_start; /* start time per pass/reboot */ 175 uint64_t spa_scan_pass_exam; /* examined bytes per pass */ 176 kmutex_t spa_async_lock; /* protect async state */ 177 kthread_t *spa_async_thread; /* thread doing async task */ 178 kthread_t *spa_async_thread_vd; /* thread doing vd async task */ 179 int spa_async_suspended; /* async tasks suspended */ 180 kcondvar_t spa_async_cv; /* wait for thread_exit() */ 181 uint16_t spa_async_tasks; /* async task mask */ 182 char *spa_root; /* alternate root directory */ 183 uint64_t spa_ena; /* spa-wide ereport ENA */ 184 int spa_last_open_failed; /* error if last open failed */ 185 uint64_t spa_last_ubsync_txg; /* "best" uberblock txg */ 186 uint64_t spa_last_ubsync_txg_ts; /* timestamp from that ub */ 187 uint64_t spa_load_txg; /* ub txg that loaded */ 188 uint64_t spa_load_txg_ts; /* timestamp from that ub */ 189 uint64_t spa_load_meta_errors; /* verify metadata err count */ 190 uint64_t spa_load_data_errors; /* verify data err count */ 191 uint64_t spa_verify_min_txg; /* start txg of verify scrub */ 192 kmutex_t spa_errlog_lock; /* error log lock */ 193 uint64_t spa_errlog_last; /* last error log object */ 194 uint64_t spa_errlog_scrub; /* scrub error log object */ 195 kmutex_t spa_errlist_lock; /* error list/ereport lock */ 196 avl_tree_t spa_errlist_last; /* last error list */ 197 avl_tree_t spa_errlist_scrub; /* scrub error list */ 198 uint64_t spa_deflate; /* should we deflate? */ 199 uint64_t spa_history; /* history object */ 200 kmutex_t spa_history_lock; /* history lock */ 201 vdev_t *spa_pending_vdev; /* pending vdev additions */ 202 kmutex_t spa_props_lock; /* property lock */ 203 uint64_t spa_pool_props_object; /* object for properties */ 204 uint64_t spa_bootfs; /* default boot filesystem */ 205 uint64_t spa_failmode; /* failure mode for the pool */ 206 uint64_t spa_delegation; /* delegation on/off */ 207 list_t spa_config_list; /* previous cache file(s) */ 208 zio_t *spa_async_zio_root; /* root of all async I/O */ 209 zio_t *spa_suspend_zio_root; /* root of all suspended I/O */ 210 kmutex_t spa_suspend_lock; /* protects suspend_zio_root */ 211 kcondvar_t spa_suspend_cv; /* notification of resume */ 212 uint8_t spa_suspended; /* pool is suspended */ 213 uint8_t spa_claiming; /* pool is doing zil_claim() */ 214 boolean_t spa_debug; /* debug enabled? */ 215 boolean_t spa_is_root; /* pool is root */ 216 int spa_minref; /* num refs when first opened */ 217 int spa_mode; /* FREAD | FWRITE */ 218 spa_log_state_t spa_log_state; /* log state */ 219 uint64_t spa_autoexpand; /* lun expansion on/off */ 220 ddt_t *spa_ddt[ZIO_CHECKSUM_FUNCTIONS]; /* in-core DDTs */ 221 uint64_t spa_ddt_stat_object; /* DDT statistics */ 222 uint64_t spa_dedup_ditto; /* dedup ditto threshold */ 223 uint64_t spa_dedup_checksum; /* default dedup checksum */ 224 uint64_t spa_dspace; /* dspace in normal class */ 225 kmutex_t spa_vdev_top_lock; /* dueling offline/remove */ 226 kmutex_t spa_proc_lock; /* protects spa_proc* */ 227 kcondvar_t spa_proc_cv; /* spa_proc_state transitions */ 228 spa_proc_state_t spa_proc_state; /* see definition */ 229 struct proc *spa_proc; /* "zpool-poolname" process */ 230 uint64_t spa_did; /* if procp != p0, did of t1 */ 231 kthread_t *spa_trim_thread; /* thread sending TRIM I/Os */ 232 kmutex_t spa_trim_lock; /* protects spa_trim_cv */ 233 kcondvar_t spa_trim_cv; /* used to notify TRIM thread */ 234 boolean_t spa_autoreplace; /* autoreplace set in open */ 235 int spa_vdev_locks; /* locks grabbed */ 236 uint64_t spa_creation_version; /* version at pool creation */ 237 uint64_t spa_prev_software_version; /* See ub_software_version */ 238 uint64_t spa_feat_for_write_obj; /* required to write to pool */ 239 uint64_t spa_feat_for_read_obj; /* required to read from pool */ 240 uint64_t spa_feat_desc_obj; /* Feature descriptions */ 241 uint64_t spa_feat_enabled_txg_obj; /* Feature enabled txg */ 242 /* cache feature refcounts */ 243 uint64_t spa_feat_refcount_cache[SPA_FEATURES]; 244#ifdef illumos 245 cyclic_id_t spa_deadman_cycid; /* cyclic id */ 246#else /* FreeBSD */ 247#ifdef _KERNEL 248 struct callout spa_deadman_cycid; /* callout id */ 249#endif 250#endif /* illumos */ 251 uint64_t spa_deadman_calls; /* number of deadman calls */ 252 hrtime_t spa_sync_starttime; /* starting time fo spa_sync */ 253 uint64_t spa_deadman_synctime; /* deadman expiration timer */ 254#ifdef illumos 255 /* 256 * spa_iokstat_lock protects spa_iokstat and 257 * spa_queue_stats[]. 258 */ 259 kmutex_t spa_iokstat_lock; 260 struct kstat *spa_iokstat; /* kstat of io to this pool */ 261 struct { 262 int spa_active; 263 int spa_queued; 264 } spa_queue_stats[ZIO_PRIORITY_NUM_QUEUEABLE]; 265#endif 266 hrtime_t spa_ccw_fail_time; /* Conf cache write fail time */ 267 268 /* 269 * spa_refcount & spa_config_lock must be the last elements 270 * because refcount_t changes size based on compilation options. 271 * In order for the MDB module to function correctly, the other 272 * fields must remain in the same location. 273 */ 274 spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */ 275 refcount_t spa_refcount; /* number of opens */ 276#ifndef sun 277 boolean_t spa_splitting_newspa; /* creating new spa in split */ 278#endif 279}; 280 281extern const char *spa_config_path; 282 283extern void spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q, 284 task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent); 285 286#ifdef __cplusplus 287} 288#endif 289 290#endif /* _SYS_SPA_IMPL_H */ 291