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 (c) 2014 Spectra Logic Corporation, 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 <sys/zfeature.h> 43 #include <zfeature_common.h> 44 45 #ifdef __cplusplus 46 extern "C" { 47 #endif 48 49 typedef struct spa_error_entry { 50 zbookmark_phys_t se_bookmark; 51 char *se_name; 52 avl_node_t se_avl; 53 } spa_error_entry_t; 54 55 typedef struct spa_history_phys { 56 uint64_t sh_pool_create_len; /* ending offset of zpool create */ 57 uint64_t sh_phys_max_off; /* physical EOF */ 58 uint64_t sh_bof; /* logical BOF */ 59 uint64_t sh_eof; /* logical EOF */ 60 uint64_t sh_records_lost; /* num of records overwritten */ 61 } spa_history_phys_t; 62 63 struct spa_aux_vdev { 64 uint64_t sav_object; /* MOS object for device list */ 65 nvlist_t *sav_config; /* cached device config */ 66 vdev_t **sav_vdevs; /* devices */ 67 int sav_count; /* number devices */ 68 boolean_t sav_sync; /* sync the device list */ 69 nvlist_t **sav_pending; /* pending device additions */ 70 uint_t sav_npending; /* # pending devices */ 71 }; 72 73 typedef struct spa_config_lock { 74 kmutex_t scl_lock; 75 kthread_t *scl_writer; 76 int scl_write_wanted; 77 kcondvar_t scl_cv; 78 refcount_t scl_count; 79 } spa_config_lock_t; 80 81 typedef struct spa_config_dirent { 82 list_node_t scd_link; 83 char *scd_path; 84 } spa_config_dirent_t; 85 86 typedef enum zio_taskq_type { 87 ZIO_TASKQ_ISSUE = 0, 88 ZIO_TASKQ_ISSUE_HIGH, 89 ZIO_TASKQ_INTERRUPT, 90 ZIO_TASKQ_INTERRUPT_HIGH, 91 ZIO_TASKQ_TYPES 92 } zio_taskq_type_t; 93 94 /* 95 * State machine for the zpool-poolname process. The states transitions 96 * are done as follows: 97 * 98 * From To Routine 99 * PROC_NONE -> PROC_CREATED spa_activate() 100 * PROC_CREATED -> PROC_ACTIVE spa_thread() 101 * PROC_ACTIVE -> PROC_DEACTIVATE spa_deactivate() 102 * PROC_DEACTIVATE -> PROC_GONE spa_thread() 103 * PROC_GONE -> PROC_NONE spa_deactivate() 104 */ 105 typedef enum spa_proc_state { 106 SPA_PROC_NONE, /* spa_proc = &p0, no process created */ 107 SPA_PROC_CREATED, /* spa_activate() has proc, is waiting */ 108 SPA_PROC_ACTIVE, /* taskqs created, spa_proc set */ 109 SPA_PROC_DEACTIVATE, /* spa_deactivate() requests process exit */ 110 SPA_PROC_GONE /* spa_thread() is exiting, spa_proc = &p0 */ 111 } spa_proc_state_t; 112 113 typedef struct spa_taskqs { 114 uint_t stqs_count; 115 taskq_t **stqs_taskq; 116 } spa_taskqs_t; 117 118 struct spa { 119 /* 120 * Fields protected by spa_namespace_lock. 121 */ 122 char spa_name[ZFS_MAX_DATASET_NAME_LEN]; /* pool name */ 123 char *spa_comment; /* comment */ 124 avl_node_t spa_avl; /* node in spa_namespace_avl */ 125 nvlist_t *spa_config; /* last synced config */ 126 nvlist_t *spa_config_syncing; /* currently syncing config */ 127 nvlist_t *spa_config_splitting; /* config for splitting */ 128 nvlist_t *spa_load_info; /* info and errors from load */ 129 uint64_t spa_config_txg; /* txg of last config change */ 130 int spa_sync_pass; /* iterate-to-convergence */ 131 pool_state_t spa_state; /* pool state */ 132 int spa_inject_ref; /* injection references */ 133 uint8_t spa_sync_on; /* sync threads are running */ 134 spa_load_state_t spa_load_state; /* current load operation */ 135 uint64_t spa_import_flags; /* import specific flags */ 136 spa_taskqs_t spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES]; 137 dsl_pool_t *spa_dsl_pool; 138 boolean_t spa_is_initializing; /* true while opening pool */ 139 metaslab_class_t *spa_normal_class; /* normal data class */ 140 metaslab_class_t *spa_log_class; /* intent log data class */ 141 uint64_t spa_first_txg; /* first txg after spa_open() */ 142 uint64_t spa_final_txg; /* txg of export/destroy */ 143 uint64_t spa_freeze_txg; /* freeze pool at this txg */ 144 uint64_t spa_load_max_txg; /* best initial ub_txg */ 145 uint64_t spa_claim_max_txg; /* highest claimed birth txg */ 146 timespec_t spa_loaded_ts; /* 1st successful open time */ 147 objset_t *spa_meta_objset; /* copy of dp->dp_meta_objset */ 148 kmutex_t spa_evicting_os_lock; /* Evicting objset list lock */ 149 list_t spa_evicting_os_list; /* Objsets being evicted. */ 150 kcondvar_t spa_evicting_os_cv; /* Objset Eviction Completion */ 151 txg_list_t spa_vdev_txg_list; /* per-txg dirty vdev list */ 152 vdev_t *spa_root_vdev; /* top-level vdev container */ 153 int spa_min_ashift; /* of vdevs in normal class */ 154 int spa_max_ashift; /* of vdevs in normal class */ 155 uint64_t spa_config_guid; /* config pool guid */ 156 uint64_t spa_load_guid; /* spa_load initialized guid */ 157 uint64_t spa_last_synced_guid; /* last synced guid */ 158 list_t spa_config_dirty_list; /* vdevs with dirty config */ 159 list_t spa_state_dirty_list; /* vdevs with dirty state */ 160 spa_aux_vdev_t spa_spares; /* hot spares */ 161 spa_aux_vdev_t spa_l2cache; /* L2ARC cache devices */ 162 nvlist_t *spa_label_features; /* Features for reading MOS */ 163 uint64_t spa_config_object; /* MOS object for pool config */ 164 uint64_t spa_config_generation; /* config generation number */ 165 uint64_t spa_syncing_txg; /* txg currently syncing */ 166 bpobj_t spa_deferred_bpobj; /* deferred-free bplist */ 167 bplist_t spa_free_bplist[TXG_SIZE]; /* bplist of stuff to free */ 168 uberblock_t spa_ubsync; /* last synced uberblock */ 169 uberblock_t spa_uberblock; /* current uberblock */ 170 boolean_t spa_extreme_rewind; /* rewind past deferred frees */ 171 uint64_t spa_last_io; /* lbolt of last non-scan I/O */ 172 kmutex_t spa_scrub_lock; /* resilver/scrub lock */ 173 uint64_t spa_scrub_inflight; /* in-flight scrub I/Os */ 174 kcondvar_t spa_scrub_io_cv; /* scrub I/O completion */ 175 uint8_t spa_scrub_active; /* active or suspended? */ 176 uint8_t spa_scrub_type; /* type of scrub we're doing */ 177 uint8_t spa_scrub_finished; /* indicator to rotate logs */ 178 uint8_t spa_scrub_started; /* started since last boot */ 179 uint8_t spa_scrub_reopen; /* scrub doing vdev_reopen */ 180 uint64_t spa_scan_pass_start; /* start time per pass/reboot */ 181 uint64_t spa_scan_pass_exam; /* examined bytes per pass */ 182 kmutex_t spa_async_lock; /* protect async state */ 183 kthread_t *spa_async_thread; /* thread doing async task */ 184 int spa_async_suspended; /* async tasks suspended */ 185 kcondvar_t spa_async_cv; /* wait for thread_exit() */ 186 uint16_t spa_async_tasks; /* async task mask */ 187 char *spa_root; /* alternate root directory */ 188 uint64_t spa_ena; /* spa-wide ereport ENA */ 189 int spa_last_open_failed; /* error if last open failed */ 190 uint64_t spa_last_ubsync_txg; /* "best" uberblock txg */ 191 uint64_t spa_last_ubsync_txg_ts; /* timestamp from that ub */ 192 uint64_t spa_load_txg; /* ub txg that loaded */ 193 uint64_t spa_load_txg_ts; /* timestamp from that ub */ 194 uint64_t spa_load_meta_errors; /* verify metadata err count */ 195 uint64_t spa_load_data_errors; /* verify data err count */ 196 uint64_t spa_verify_min_txg; /* start txg of verify scrub */ 197 kmutex_t spa_errlog_lock; /* error log lock */ 198 uint64_t spa_errlog_last; /* last error log object */ 199 uint64_t spa_errlog_scrub; /* scrub error log object */ 200 kmutex_t spa_errlist_lock; /* error list/ereport lock */ 201 avl_tree_t spa_errlist_last; /* last error list */ 202 avl_tree_t spa_errlist_scrub; /* scrub error list */ 203 uint64_t spa_deflate; /* should we deflate? */ 204 uint64_t spa_history; /* history object */ 205 kmutex_t spa_history_lock; /* history lock */ 206 vdev_t *spa_pending_vdev; /* pending vdev additions */ 207 kmutex_t spa_props_lock; /* property lock */ 208 uint64_t spa_pool_props_object; /* object for properties */ 209 uint64_t spa_bootfs; /* default boot filesystem */ 210 uint64_t spa_failmode; /* failure mode for the pool */ 211 uint64_t spa_delegation; /* delegation on/off */ 212 list_t spa_config_list; /* previous cache file(s) */ 213 /* per-CPU array of root of async I/O: */ 214 zio_t **spa_async_zio_root; 215 zio_t *spa_suspend_zio_root; /* root of all suspended I/O */ 216 kmutex_t spa_suspend_lock; /* protects suspend_zio_root */ 217 kcondvar_t spa_suspend_cv; /* notification of resume */ 218 uint8_t spa_suspended; /* pool is suspended */ 219 uint8_t spa_claiming; /* pool is doing zil_claim() */ 220 boolean_t spa_debug; /* debug enabled? */ 221 boolean_t spa_is_root; /* pool is root */ 222 int spa_minref; /* num refs when first opened */ 223 int spa_mode; /* FREAD | FWRITE */ 224 spa_log_state_t spa_log_state; /* log state */ 225 uint64_t spa_autoexpand; /* lun expansion on/off */ 226 ddt_t *spa_ddt[ZIO_CHECKSUM_FUNCTIONS]; /* in-core DDTs */ 227 uint64_t spa_ddt_stat_object; /* DDT statistics */ 228 uint64_t spa_dedup_ditto; /* dedup ditto threshold */ 229 uint64_t spa_dedup_checksum; /* default dedup checksum */ 230 uint64_t spa_dspace; /* dspace in normal class */ 231 kmutex_t spa_vdev_top_lock; /* dueling offline/remove */ 232 kmutex_t spa_proc_lock; /* protects spa_proc* */ 233 kcondvar_t spa_proc_cv; /* spa_proc_state transitions */ 234 spa_proc_state_t spa_proc_state; /* see definition */ 235 struct proc *spa_proc; /* "zpool-poolname" process */ 236 uint64_t spa_did; /* if procp != p0, did of t1 */ 237 boolean_t spa_autoreplace; /* autoreplace set in open */ 238 int spa_vdev_locks; /* locks grabbed */ 239 uint64_t spa_creation_version; /* version at pool creation */ 240 uint64_t spa_prev_software_version; /* See ub_software_version */ 241 uint64_t spa_feat_for_write_obj; /* required to write to pool */ 242 uint64_t spa_feat_for_read_obj; /* required to read from pool */ 243 uint64_t spa_feat_desc_obj; /* Feature descriptions */ 244 uint64_t spa_feat_enabled_txg_obj; /* Feature enabled txg */ 245 /* cache feature refcounts */ 246 uint64_t spa_feat_refcount_cache[SPA_FEATURES]; 247 cyclic_id_t spa_deadman_cycid; /* cyclic id */ 248 uint64_t spa_deadman_calls; /* number of deadman calls */ 249 hrtime_t spa_sync_starttime; /* starting time fo spa_sync */ 250 uint64_t spa_deadman_synctime; /* deadman expiration timer */ 251 252 /* 253 * spa_iokstat_lock protects spa_iokstat and 254 * spa_queue_stats[]. 255 */ 256 kmutex_t spa_iokstat_lock; 257 struct kstat *spa_iokstat; /* kstat of io to this pool */ 258 struct { 259 int spa_active; 260 int spa_queued; 261 } spa_queue_stats[ZIO_PRIORITY_NUM_QUEUEABLE]; 262 263 hrtime_t spa_ccw_fail_time; /* Conf cache write fail time */ 264 265 /* 266 * spa_refcount & spa_config_lock must be the last elements 267 * because refcount_t changes size based on compilation options. 268 * In order for the MDB module to function correctly, the other 269 * fields must remain in the same location. 270 */ 271 spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */ 272 refcount_t spa_refcount; /* number of opens */ 273 }; 274 275 extern const char *spa_config_path; 276 277 extern void spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q, 278 task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent); 279 280 #ifdef __cplusplus 281 } 282 #endif 283 284 #endif /* _SYS_SPA_IMPL_H */ 285