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 * Copyright 2013 Saso Kiselkov. All rights reserved. 27 * Copyright (c) 2017 Datto Inc. 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 #ifdef __cplusplus 48 extern "C" { 49 #endif 50 51 typedef struct spa_error_entry { 52 zbookmark_phys_t se_bookmark; 53 char *se_name; 54 avl_node_t se_avl; 55 } spa_error_entry_t; 56 57 typedef struct spa_history_phys { 58 uint64_t sh_pool_create_len; /* ending offset of zpool create */ 59 uint64_t sh_phys_max_off; /* physical EOF */ 60 uint64_t sh_bof; /* logical BOF */ 61 uint64_t sh_eof; /* logical EOF */ 62 uint64_t sh_records_lost; /* num of records overwritten */ 63 } spa_history_phys_t; 64 65 struct spa_aux_vdev { 66 uint64_t sav_object; /* MOS object for device list */ 67 nvlist_t *sav_config; /* cached device config */ 68 vdev_t **sav_vdevs; /* devices */ 69 int sav_count; /* number devices */ 70 boolean_t sav_sync; /* sync the device list */ 71 nvlist_t **sav_pending; /* pending device additions */ 72 uint_t sav_npending; /* # pending devices */ 73 }; 74 75 typedef struct spa_config_lock { 76 kmutex_t scl_lock; 77 kthread_t *scl_writer; 78 int scl_write_wanted; 79 kcondvar_t scl_cv; 80 refcount_t scl_count; 81 } spa_config_lock_t; 82 83 typedef struct spa_config_dirent { 84 list_node_t scd_link; 85 char *scd_path; 86 } spa_config_dirent_t; 87 88 typedef enum zio_taskq_type { 89 ZIO_TASKQ_ISSUE = 0, 90 ZIO_TASKQ_ISSUE_HIGH, 91 ZIO_TASKQ_INTERRUPT, 92 ZIO_TASKQ_INTERRUPT_HIGH, 93 ZIO_TASKQ_TYPES 94 } zio_taskq_type_t; 95 96 /* 97 * State machine for the zpool-poolname process. The states transitions 98 * are done as follows: 99 * 100 * From To Routine 101 * PROC_NONE -> PROC_CREATED spa_activate() 102 * PROC_CREATED -> PROC_ACTIVE spa_thread() 103 * PROC_ACTIVE -> PROC_DEACTIVATE spa_deactivate() 104 * PROC_DEACTIVATE -> PROC_GONE spa_thread() 105 * PROC_GONE -> PROC_NONE spa_deactivate() 106 */ 107 typedef enum spa_proc_state { 108 SPA_PROC_NONE, /* spa_proc = &p0, no process created */ 109 SPA_PROC_CREATED, /* spa_activate() has proc, is waiting */ 110 SPA_PROC_ACTIVE, /* taskqs created, spa_proc set */ 111 SPA_PROC_DEACTIVATE, /* spa_deactivate() requests process exit */ 112 SPA_PROC_GONE /* spa_thread() is exiting, spa_proc = &p0 */ 113 } spa_proc_state_t; 114 115 typedef struct spa_taskqs { 116 uint_t stqs_count; 117 taskq_t **stqs_taskq; 118 } spa_taskqs_t; 119 120 typedef enum spa_all_vdev_zap_action { 121 AVZ_ACTION_NONE = 0, 122 AVZ_ACTION_DESTROY, /* Destroy all per-vdev ZAPs and the AVZ. */ 123 AVZ_ACTION_REBUILD, /* Populate the new AVZ, see spa_avz_rebuild */ 124 AVZ_ACTION_INITIALIZE 125 } spa_avz_action_t; 126 127 struct spa { 128 /* 129 * Fields protected by spa_namespace_lock. 130 */ 131 char spa_name[ZFS_MAX_DATASET_NAME_LEN]; /* pool name */ 132 char *spa_comment; /* comment */ 133 avl_node_t spa_avl; /* node in spa_namespace_avl */ 134 nvlist_t *spa_config; /* last synced config */ 135 nvlist_t *spa_config_syncing; /* currently syncing config */ 136 nvlist_t *spa_config_splitting; /* config for splitting */ 137 nvlist_t *spa_load_info; /* info and errors from load */ 138 uint64_t spa_config_txg; /* txg of last config change */ 139 int spa_sync_pass; /* iterate-to-convergence */ 140 pool_state_t spa_state; /* pool state */ 141 int spa_inject_ref; /* injection references */ 142 uint8_t spa_sync_on; /* sync threads are running */ 143 spa_load_state_t spa_load_state; /* current load operation */ 144 uint64_t spa_import_flags; /* import specific flags */ 145 spa_taskqs_t spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES]; 146 dsl_pool_t *spa_dsl_pool; 147 boolean_t spa_is_initializing; /* true while opening pool */ 148 metaslab_class_t *spa_normal_class; /* normal data class */ 149 metaslab_class_t *spa_log_class; /* intent log data class */ 150 uint64_t spa_first_txg; /* first txg after spa_open() */ 151 uint64_t spa_final_txg; /* txg of export/destroy */ 152 uint64_t spa_freeze_txg; /* freeze pool at this txg */ 153 uint64_t spa_load_max_txg; /* best initial ub_txg */ 154 uint64_t spa_claim_max_txg; /* highest claimed birth txg */ 155 timespec_t spa_loaded_ts; /* 1st successful open time */ 156 objset_t *spa_meta_objset; /* copy of dp->dp_meta_objset */ 157 kmutex_t spa_evicting_os_lock; /* Evicting objset list lock */ 158 list_t spa_evicting_os_list; /* Objsets being evicted. */ 159 kcondvar_t spa_evicting_os_cv; /* Objset Eviction Completion */ 160 txg_list_t spa_vdev_txg_list; /* per-txg dirty vdev list */ 161 vdev_t *spa_root_vdev; /* top-level vdev container */ 162 int spa_min_ashift; /* of vdevs in normal class */ 163 int spa_max_ashift; /* of vdevs in normal class */ 164 uint64_t spa_config_guid; /* config pool guid */ 165 uint64_t spa_load_guid; /* spa_load initialized guid */ 166 uint64_t spa_last_synced_guid; /* last synced guid */ 167 list_t spa_config_dirty_list; /* vdevs with dirty config */ 168 list_t spa_state_dirty_list; /* vdevs with dirty state */ 169 kmutex_t spa_alloc_lock; 170 avl_tree_t spa_alloc_tree; 171 spa_aux_vdev_t spa_spares; /* hot spares */ 172 spa_aux_vdev_t spa_l2cache; /* L2ARC cache devices */ 173 nvlist_t *spa_label_features; /* Features for reading MOS */ 174 uint64_t spa_config_object; /* MOS object for pool config */ 175 uint64_t spa_config_generation; /* config generation number */ 176 uint64_t spa_syncing_txg; /* txg currently syncing */ 177 bpobj_t spa_deferred_bpobj; /* deferred-free bplist */ 178 bplist_t spa_free_bplist[TXG_SIZE]; /* bplist of stuff to free */ 179 zio_cksum_salt_t spa_cksum_salt; /* secret salt for cksum */ 180 /* checksum context templates */ 181 kmutex_t spa_cksum_tmpls_lock; 182 void *spa_cksum_tmpls[ZIO_CHECKSUM_FUNCTIONS]; 183 uberblock_t spa_ubsync; /* last synced uberblock */ 184 uberblock_t spa_uberblock; /* current uberblock */ 185 boolean_t spa_extreme_rewind; /* rewind past deferred frees */ 186 uint64_t spa_last_io; /* lbolt of last non-scan I/O */ 187 kmutex_t spa_scrub_lock; /* resilver/scrub lock */ 188 uint64_t spa_scrub_inflight; /* in-flight scrub I/Os */ 189 kcondvar_t spa_scrub_io_cv; /* scrub I/O completion */ 190 uint8_t spa_scrub_active; /* active or suspended? */ 191 uint8_t spa_scrub_type; /* type of scrub we're doing */ 192 uint8_t spa_scrub_finished; /* indicator to rotate logs */ 193 uint8_t spa_scrub_started; /* started since last boot */ 194 uint8_t spa_scrub_reopen; /* scrub doing vdev_reopen */ 195 uint64_t spa_scan_pass_start; /* start time per pass/reboot */ 196 uint64_t spa_scan_pass_scrub_pause; /* scrub pause time */ 197 uint64_t spa_scan_pass_scrub_spent_paused; /* total paused */ 198 uint64_t spa_scan_pass_exam; /* examined bytes per pass */ 199 kmutex_t spa_async_lock; /* protect async state */ 200 kthread_t *spa_async_thread; /* thread doing async task */ 201 int spa_async_suspended; /* async tasks suspended */ 202 kcondvar_t spa_async_cv; /* wait for thread_exit() */ 203 uint16_t spa_async_tasks; /* async task mask */ 204 char *spa_root; /* alternate root directory */ 205 uint64_t spa_ena; /* spa-wide ereport ENA */ 206 int spa_last_open_failed; /* error if last open failed */ 207 uint64_t spa_last_ubsync_txg; /* "best" uberblock txg */ 208 uint64_t spa_last_ubsync_txg_ts; /* timestamp from that ub */ 209 uint64_t spa_load_txg; /* ub txg that loaded */ 210 uint64_t spa_load_txg_ts; /* timestamp from that ub */ 211 uint64_t spa_load_meta_errors; /* verify metadata err count */ 212 uint64_t spa_load_data_errors; /* verify data err count */ 213 uint64_t spa_verify_min_txg; /* start txg of verify scrub */ 214 kmutex_t spa_errlog_lock; /* error log lock */ 215 uint64_t spa_errlog_last; /* last error log object */ 216 uint64_t spa_errlog_scrub; /* scrub error log object */ 217 kmutex_t spa_errlist_lock; /* error list/ereport lock */ 218 avl_tree_t spa_errlist_last; /* last error list */ 219 avl_tree_t spa_errlist_scrub; /* scrub error list */ 220 uint64_t spa_deflate; /* should we deflate? */ 221 uint64_t spa_history; /* history object */ 222 kmutex_t spa_history_lock; /* history lock */ 223 vdev_t *spa_pending_vdev; /* pending vdev additions */ 224 kmutex_t spa_props_lock; /* property lock */ 225 uint64_t spa_pool_props_object; /* object for properties */ 226 uint64_t spa_bootfs; /* default boot filesystem */ 227 uint64_t spa_failmode; /* failure mode for the pool */ 228 uint64_t spa_delegation; /* delegation on/off */ 229 list_t spa_config_list; /* previous cache file(s) */ 230 /* per-CPU array of root of async I/O: */ 231 zio_t **spa_async_zio_root; 232 zio_t *spa_suspend_zio_root; /* root of all suspended I/O */ 233 kmutex_t spa_suspend_lock; /* protects suspend_zio_root */ 234 kcondvar_t spa_suspend_cv; /* notification of resume */ 235 uint8_t spa_suspended; /* pool is suspended */ 236 uint8_t spa_claiming; /* pool is doing zil_claim() */ 237 boolean_t spa_debug; /* debug enabled? */ 238 boolean_t spa_is_root; /* pool is root */ 239 int spa_minref; /* num refs when first opened */ 240 int spa_mode; /* FREAD | FWRITE */ 241 spa_log_state_t spa_log_state; /* log state */ 242 uint64_t spa_autoexpand; /* lun expansion on/off */ 243 uint64_t spa_bootsize; /* efi system partition size */ 244 ddt_t *spa_ddt[ZIO_CHECKSUM_FUNCTIONS]; /* in-core DDTs */ 245 uint64_t spa_ddt_stat_object; /* DDT statistics */ 246 uint64_t spa_dedup_ditto; /* dedup ditto threshold */ 247 uint64_t spa_dedup_checksum; /* default dedup checksum */ 248 uint64_t spa_dspace; /* dspace in normal class */ 249 kmutex_t spa_vdev_top_lock; /* dueling offline/remove */ 250 kmutex_t spa_proc_lock; /* protects spa_proc* */ 251 kcondvar_t spa_proc_cv; /* spa_proc_state transitions */ 252 spa_proc_state_t spa_proc_state; /* see definition */ 253 struct proc *spa_proc; /* "zpool-poolname" process */ 254 uint64_t spa_did; /* if procp != p0, did of t1 */ 255 boolean_t spa_autoreplace; /* autoreplace set in open */ 256 int spa_vdev_locks; /* locks grabbed */ 257 uint64_t spa_creation_version; /* version at pool creation */ 258 uint64_t spa_prev_software_version; /* See ub_software_version */ 259 uint64_t spa_feat_for_write_obj; /* required to write to pool */ 260 uint64_t spa_feat_for_read_obj; /* required to read from pool */ 261 uint64_t spa_feat_desc_obj; /* Feature descriptions */ 262 uint64_t spa_feat_enabled_txg_obj; /* Feature enabled txg */ 263 /* cache feature refcounts */ 264 uint64_t spa_feat_refcount_cache[SPA_FEATURES]; 265 cyclic_id_t spa_deadman_cycid; /* cyclic id */ 266 uint64_t spa_deadman_calls; /* number of deadman calls */ 267 hrtime_t spa_sync_starttime; /* starting time fo spa_sync */ 268 uint64_t spa_deadman_synctime; /* deadman expiration timer */ 269 uint64_t spa_all_vdev_zaps; /* ZAP of per-vd ZAP obj #s */ 270 spa_avz_action_t spa_avz_action; /* destroy/rebuild AVZ? */ 271 272 /* 273 * spa_iokstat_lock protects spa_iokstat and 274 * spa_queue_stats[]. 275 */ 276 kmutex_t spa_iokstat_lock; 277 struct kstat *spa_iokstat; /* kstat of io to this pool */ 278 struct { 279 int spa_active; 280 int spa_queued; 281 } spa_queue_stats[ZIO_PRIORITY_NUM_QUEUEABLE]; 282 283 hrtime_t spa_ccw_fail_time; /* Conf cache write fail time */ 284 285 /* 286 * spa_refcount & spa_config_lock must be the last elements 287 * because refcount_t changes size based on compilation options. 288 * In order for the MDB module to function correctly, the other 289 * fields must remain in the same location. 290 */ 291 spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */ 292 refcount_t spa_refcount; /* number of opens */ 293 }; 294 295 extern const char *spa_config_path; 296 297 extern void spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q, 298 task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent); 299 300 #ifdef __cplusplus 301 } 302 #endif 303 304 #endif /* _SYS_SPA_IMPL_H */ 305