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 */ 26 27 #ifndef _SYS_SPA_IMPL_H 28 #define _SYS_SPA_IMPL_H 29 30 #include <sys/spa.h> 31 #include <sys/vdev.h> 32 #include <sys/metaslab.h> 33 #include <sys/dmu.h> 34 #include <sys/dsl_pool.h> 35 #include <sys/uberblock_impl.h> 36 #include <sys/zfs_context.h> 37 #include <sys/avl.h> 38 #include <sys/refcount.h> 39 #include <sys/bplist.h> 40 #include <sys/bpobj.h> 41 #include <zfeature_common.h> 42 43 #ifdef __cplusplus 44 extern "C" { 45 #endif 46 47 typedef struct spa_error_entry { 48 zbookmark_t se_bookmark; 49 char *se_name; 50 avl_node_t se_avl; 51 } spa_error_entry_t; 52 53 typedef struct spa_history_phys { 54 uint64_t sh_pool_create_len; /* ending offset of zpool create */ 55 uint64_t sh_phys_max_off; /* physical EOF */ 56 uint64_t sh_bof; /* logical BOF */ 57 uint64_t sh_eof; /* logical EOF */ 58 uint64_t sh_records_lost; /* num of records overwritten */ 59 } spa_history_phys_t; 60 61 struct spa_aux_vdev { 62 uint64_t sav_object; /* MOS object for device list */ 63 nvlist_t *sav_config; /* cached device config */ 64 vdev_t **sav_vdevs; /* devices */ 65 int sav_count; /* number devices */ 66 boolean_t sav_sync; /* sync the device list */ 67 nvlist_t **sav_pending; /* pending device additions */ 68 uint_t sav_npending; /* # pending devices */ 69 }; 70 71 typedef struct spa_config_lock { 72 kmutex_t scl_lock; 73 kthread_t *scl_writer; 74 int scl_write_wanted; 75 kcondvar_t scl_cv; 76 refcount_t scl_count; 77 } spa_config_lock_t; 78 79 typedef struct spa_config_dirent { 80 list_node_t scd_link; 81 char *scd_path; 82 } spa_config_dirent_t; 83 84 typedef enum zio_taskq_type { 85 ZIO_TASKQ_ISSUE = 0, 86 ZIO_TASKQ_ISSUE_HIGH, 87 ZIO_TASKQ_INTERRUPT, 88 ZIO_TASKQ_INTERRUPT_HIGH, 89 ZIO_TASKQ_TYPES 90 } zio_taskq_type_t; 91 92 /* 93 * State machine for the zpool-poolname process. The states transitions 94 * are done as follows: 95 * 96 * From To Routine 97 * PROC_NONE -> PROC_CREATED spa_activate() 98 * PROC_CREATED -> PROC_ACTIVE spa_thread() 99 * PROC_ACTIVE -> PROC_DEACTIVATE spa_deactivate() 100 * PROC_DEACTIVATE -> PROC_GONE spa_thread() 101 * PROC_GONE -> PROC_NONE spa_deactivate() 102 */ 103 typedef enum spa_proc_state { 104 SPA_PROC_NONE, /* spa_proc = &p0, no process created */ 105 SPA_PROC_CREATED, /* spa_activate() has proc, is waiting */ 106 SPA_PROC_ACTIVE, /* taskqs created, spa_proc set */ 107 SPA_PROC_DEACTIVATE, /* spa_deactivate() requests process exit */ 108 SPA_PROC_GONE /* spa_thread() is exiting, spa_proc = &p0 */ 109 } spa_proc_state_t; 110 111 typedef struct spa_taskqs { 112 uint_t stqs_count; 113 taskq_t **stqs_taskq; 114 } spa_taskqs_t; 115 116 struct spa { 117 /* 118 * Fields protected by spa_namespace_lock. 119 */ 120 char spa_name[MAXNAMELEN]; /* pool name */ 121 char *spa_comment; /* comment */ 122 avl_node_t spa_avl; /* node in spa_namespace_avl */ 123 nvlist_t *spa_config; /* last synced config */ 124 nvlist_t *spa_config_syncing; /* currently syncing config */ 125 nvlist_t *spa_config_splitting; /* config for splitting */ 126 nvlist_t *spa_load_info; /* info and errors from load */ 127 uint64_t spa_config_txg; /* txg of last config change */ 128 int spa_sync_pass; /* iterate-to-convergence */ 129 pool_state_t spa_state; /* pool state */ 130 int spa_inject_ref; /* injection references */ 131 uint8_t spa_sync_on; /* sync threads are running */ 132 spa_load_state_t spa_load_state; /* current load operation */ 133 uint64_t spa_import_flags; /* import specific flags */ 134 spa_taskqs_t spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES]; 135 dsl_pool_t *spa_dsl_pool; 136 boolean_t spa_is_initializing; /* true while opening pool */ 137 metaslab_class_t *spa_normal_class; /* normal data class */ 138 metaslab_class_t *spa_log_class; /* intent log data class */ 139 uint64_t spa_first_txg; /* first txg after spa_open() */ 140 uint64_t spa_final_txg; /* txg of export/destroy */ 141 uint64_t spa_freeze_txg; /* freeze pool at this txg */ 142 uint64_t spa_load_max_txg; /* best initial ub_txg */ 143 uint64_t spa_claim_max_txg; /* highest claimed birth txg */ 144 timespec_t spa_loaded_ts; /* 1st successful open time */ 145 objset_t *spa_meta_objset; /* copy of dp->dp_meta_objset */ 146 txg_list_t spa_vdev_txg_list; /* per-txg dirty vdev list */ 147 vdev_t *spa_root_vdev; /* top-level vdev container */ 148 uint64_t spa_config_guid; /* config pool guid */ 149 uint64_t spa_load_guid; /* spa_load initialized guid */ 150 uint64_t spa_last_synced_guid; /* last synced guid */ 151 list_t spa_config_dirty_list; /* vdevs with dirty config */ 152 list_t spa_state_dirty_list; /* vdevs with dirty state */ 153 spa_aux_vdev_t spa_spares; /* hot spares */ 154 spa_aux_vdev_t spa_l2cache; /* L2ARC cache devices */ 155 nvlist_t *spa_label_features; /* Features for reading MOS */ 156 uint64_t spa_config_object; /* MOS object for pool config */ 157 uint64_t spa_config_generation; /* config generation number */ 158 uint64_t spa_syncing_txg; /* txg currently syncing */ 159 bpobj_t spa_deferred_bpobj; /* deferred-free bplist */ 160 bplist_t spa_free_bplist[TXG_SIZE]; /* bplist of stuff to free */ 161 uberblock_t spa_ubsync; /* last synced uberblock */ 162 uberblock_t spa_uberblock; /* current uberblock */ 163 boolean_t spa_extreme_rewind; /* rewind past deferred frees */ 164 uint64_t spa_last_io; /* lbolt of last non-scan I/O */ 165 kmutex_t spa_scrub_lock; /* resilver/scrub lock */ 166 uint64_t spa_scrub_inflight; /* in-flight scrub I/Os */ 167 kcondvar_t spa_scrub_io_cv; /* scrub I/O completion */ 168 uint8_t spa_scrub_active; /* active or suspended? */ 169 uint8_t spa_scrub_type; /* type of scrub we're doing */ 170 uint8_t spa_scrub_finished; /* indicator to rotate logs */ 171 uint8_t spa_scrub_started; /* started since last boot */ 172 uint8_t spa_scrub_reopen; /* scrub doing vdev_reopen */ 173 uint64_t spa_scan_pass_start; /* start time per pass/reboot */ 174 uint64_t spa_scan_pass_exam; /* examined bytes per pass */ 175 kmutex_t spa_async_lock; /* protect async state */ 176 kthread_t *spa_async_thread; /* thread doing async task */ 177 int spa_async_suspended; /* async tasks suspended */ 178 kcondvar_t spa_async_cv; /* wait for thread_exit() */ 179 uint16_t spa_async_tasks; /* async task mask */ 180 char *spa_root; /* alternate root directory */ 181 uint64_t spa_ena; /* spa-wide ereport ENA */ 182 int spa_last_open_failed; /* error if last open failed */ 183 uint64_t spa_last_ubsync_txg; /* "best" uberblock txg */ 184 uint64_t spa_last_ubsync_txg_ts; /* timestamp from that ub */ 185 uint64_t spa_load_txg; /* ub txg that loaded */ 186 uint64_t spa_load_txg_ts; /* timestamp from that ub */ 187 uint64_t spa_load_meta_errors; /* verify metadata err count */ 188 uint64_t spa_load_data_errors; /* verify data err count */ 189 uint64_t spa_verify_min_txg; /* start txg of verify scrub */ 190 kmutex_t spa_errlog_lock; /* error log lock */ 191 uint64_t spa_errlog_last; /* last error log object */ 192 uint64_t spa_errlog_scrub; /* scrub error log object */ 193 kmutex_t spa_errlist_lock; /* error list/ereport lock */ 194 avl_tree_t spa_errlist_last; /* last error list */ 195 avl_tree_t spa_errlist_scrub; /* scrub error list */ 196 uint64_t spa_deflate; /* should we deflate? */ 197 uint64_t spa_history; /* history object */ 198 kmutex_t spa_history_lock; /* history lock */ 199 vdev_t *spa_pending_vdev; /* pending vdev additions */ 200 kmutex_t spa_props_lock; /* property lock */ 201 uint64_t spa_pool_props_object; /* object for properties */ 202 uint64_t spa_bootfs; /* default boot filesystem */ 203 uint64_t spa_failmode; /* failure mode for the pool */ 204 uint64_t spa_delegation; /* delegation on/off */ 205 list_t spa_config_list; /* previous cache file(s) */ 206 zio_t *spa_async_zio_root; /* root of all async I/O */ 207 zio_t *spa_suspend_zio_root; /* root of all suspended I/O */ 208 kmutex_t spa_suspend_lock; /* protects suspend_zio_root */ 209 kcondvar_t spa_suspend_cv; /* notification of resume */ 210 uint8_t spa_suspended; /* pool is suspended */ 211 uint8_t spa_claiming; /* pool is doing zil_claim() */ 212 boolean_t spa_debug; /* debug enabled? */ 213 boolean_t spa_is_root; /* pool is root */ 214 int spa_minref; /* num refs when first opened */ 215 int spa_mode; /* FREAD | FWRITE */ 216 spa_log_state_t spa_log_state; /* log state */ 217 uint64_t spa_autoexpand; /* lun expansion on/off */ 218 ddt_t *spa_ddt[ZIO_CHECKSUM_FUNCTIONS]; /* in-core DDTs */ 219 uint64_t spa_ddt_stat_object; /* DDT statistics */ 220 uint64_t spa_dedup_ditto; /* dedup ditto threshold */ 221 uint64_t spa_dedup_checksum; /* default dedup checksum */ 222 uint64_t spa_dspace; /* dspace in normal class */ 223 kmutex_t spa_vdev_top_lock; /* dueling offline/remove */ 224 kmutex_t spa_proc_lock; /* protects spa_proc* */ 225 kcondvar_t spa_proc_cv; /* spa_proc_state transitions */ 226 spa_proc_state_t spa_proc_state; /* see definition */ 227 struct proc *spa_proc; /* "zpool-poolname" process */ 228 uint64_t spa_did; /* if procp != p0, did of t1 */ 229 boolean_t spa_autoreplace; /* autoreplace set in open */ 230 int spa_vdev_locks; /* locks grabbed */ 231 uint64_t spa_creation_version; /* version at pool creation */ 232 uint64_t spa_prev_software_version; /* See ub_software_version */ 233 uint64_t spa_feat_for_write_obj; /* required to write to pool */ 234 uint64_t spa_feat_for_read_obj; /* required to read from pool */ 235 uint64_t spa_feat_desc_obj; /* Feature descriptions */ 236 uint64_t spa_feat_enabled_txg_obj; /* Feature enabled txg */ 237 /* cache feature refcounts */ 238 uint64_t spa_feat_refcount_cache[SPA_FEATURES]; 239 cyclic_id_t spa_deadman_cycid; /* cyclic id */ 240 uint64_t spa_deadman_calls; /* number of deadman calls */ 241 hrtime_t spa_sync_starttime; /* starting time fo spa_sync */ 242 uint64_t spa_deadman_synctime; /* deadman expiration timer */ 243 244 /* 245 * spa_iokstat_lock protects spa_iokstat and 246 * spa_queue_stats[]. 247 */ 248 kmutex_t spa_iokstat_lock; 249 struct kstat *spa_iokstat; /* kstat of io to this pool */ 250 struct { 251 int spa_active; 252 int spa_queued; 253 } spa_queue_stats[ZIO_PRIORITY_NUM_QUEUEABLE]; 254 255 hrtime_t spa_ccw_fail_time; /* Conf cache write fail time */ 256 257 /* 258 * spa_refcount & spa_config_lock must be the last elements 259 * because refcount_t changes size based on compilation options. 260 * In order for the MDB module to function correctly, the other 261 * fields must remain in the same location. 262 */ 263 spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */ 264 refcount_t spa_refcount; /* number of opens */ 265 }; 266 267 extern const char *spa_config_path; 268 269 extern void spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q, 270 task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent); 271 272 #ifdef __cplusplus 273 } 274 #endif 275 276 #endif /* _SYS_SPA_IMPL_H */ 277