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) 2012 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 42 #ifdef __cplusplus 43 extern "C" { 44 #endif 45 46 typedef struct spa_error_entry { 47 zbookmark_t se_bookmark; 48 char *se_name; 49 avl_node_t se_avl; 50 } spa_error_entry_t; 51 52 typedef struct spa_history_phys { 53 uint64_t sh_pool_create_len; /* ending offset of zpool create */ 54 uint64_t sh_phys_max_off; /* physical EOF */ 55 uint64_t sh_bof; /* logical BOF */ 56 uint64_t sh_eof; /* logical EOF */ 57 uint64_t sh_records_lost; /* num of records overwritten */ 58 } spa_history_phys_t; 59 60 struct spa_aux_vdev { 61 uint64_t sav_object; /* MOS object for device list */ 62 nvlist_t *sav_config; /* cached device config */ 63 vdev_t **sav_vdevs; /* devices */ 64 int sav_count; /* number devices */ 65 boolean_t sav_sync; /* sync the device list */ 66 nvlist_t **sav_pending; /* pending device additions */ 67 uint_t sav_npending; /* # pending devices */ 68 }; 69 70 typedef struct spa_config_lock { 71 kmutex_t scl_lock; 72 kthread_t *scl_writer; 73 int scl_write_wanted; 74 kcondvar_t scl_cv; 75 refcount_t scl_count; 76 } spa_config_lock_t; 77 78 typedef struct spa_config_dirent { 79 list_node_t scd_link; 80 char *scd_path; 81 } spa_config_dirent_t; 82 83 typedef enum zio_taskq_type { 84 ZIO_TASKQ_ISSUE = 0, 85 ZIO_TASKQ_ISSUE_HIGH, 86 ZIO_TASKQ_INTERRUPT, 87 ZIO_TASKQ_INTERRUPT_HIGH, 88 ZIO_TASKQ_TYPES 89 } zio_taskq_type_t; 90 91 /* 92 * State machine for the zpool-poolname process. The states transitions 93 * are done as follows: 94 * 95 * From To Routine 96 * PROC_NONE -> PROC_CREATED spa_activate() 97 * PROC_CREATED -> PROC_ACTIVE spa_thread() 98 * PROC_ACTIVE -> PROC_DEACTIVATE spa_deactivate() 99 * PROC_DEACTIVATE -> PROC_GONE spa_thread() 100 * PROC_GONE -> PROC_NONE spa_deactivate() 101 */ 102 typedef enum spa_proc_state { 103 SPA_PROC_NONE, /* spa_proc = &p0, no process created */ 104 SPA_PROC_CREATED, /* spa_activate() has proc, is waiting */ 105 SPA_PROC_ACTIVE, /* taskqs created, spa_proc set */ 106 SPA_PROC_DEACTIVATE, /* spa_deactivate() requests process exit */ 107 SPA_PROC_GONE /* spa_thread() is exiting, spa_proc = &p0 */ 108 } spa_proc_state_t; 109 110 typedef struct spa_taskqs { 111 uint_t stqs_count; 112 taskq_t **stqs_taskq; 113 } spa_taskqs_t; 114 115 struct spa { 116 /* 117 * Fields protected by spa_namespace_lock. 118 */ 119 char spa_name[MAXNAMELEN]; /* pool name */ 120 char *spa_comment; /* comment */ 121 avl_node_t spa_avl; /* node in spa_namespace_avl */ 122 nvlist_t *spa_config; /* last synced config */ 123 nvlist_t *spa_config_syncing; /* currently syncing config */ 124 nvlist_t *spa_config_splitting; /* config for splitting */ 125 nvlist_t *spa_load_info; /* info and errors from load */ 126 uint64_t spa_config_txg; /* txg of last config change */ 127 int spa_sync_pass; /* iterate-to-convergence */ 128 pool_state_t spa_state; /* pool state */ 129 int spa_inject_ref; /* injection references */ 130 uint8_t spa_sync_on; /* sync threads are running */ 131 spa_load_state_t spa_load_state; /* current load operation */ 132 uint64_t spa_import_flags; /* import specific flags */ 133 spa_taskqs_t spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES]; 134 dsl_pool_t *spa_dsl_pool; 135 boolean_t spa_is_initializing; /* true while opening pool */ 136 metaslab_class_t *spa_normal_class; /* normal data class */ 137 metaslab_class_t *spa_log_class; /* intent log data class */ 138 uint64_t spa_first_txg; /* first txg after spa_open() */ 139 uint64_t spa_final_txg; /* txg of export/destroy */ 140 uint64_t spa_freeze_txg; /* freeze pool at this txg */ 141 uint64_t spa_load_max_txg; /* best initial ub_txg */ 142 uint64_t spa_claim_max_txg; /* highest claimed birth txg */ 143 timespec_t spa_loaded_ts; /* 1st successful open time */ 144 objset_t *spa_meta_objset; /* copy of dp->dp_meta_objset */ 145 txg_list_t spa_vdev_txg_list; /* per-txg dirty vdev list */ 146 vdev_t *spa_root_vdev; /* top-level vdev container */ 147 uint64_t spa_config_guid; /* config pool guid */ 148 uint64_t spa_load_guid; /* spa_load initialized guid */ 149 uint64_t spa_last_synced_guid; /* last synced guid */ 150 list_t spa_config_dirty_list; /* vdevs with dirty config */ 151 list_t spa_state_dirty_list; /* vdevs with dirty state */ 152 spa_aux_vdev_t spa_spares; /* hot spares */ 153 spa_aux_vdev_t spa_l2cache; /* L2ARC cache devices */ 154 nvlist_t *spa_label_features; /* Features for reading MOS */ 155 uint64_t spa_config_object; /* MOS object for pool config */ 156 uint64_t spa_config_generation; /* config generation number */ 157 uint64_t spa_syncing_txg; /* txg currently syncing */ 158 bpobj_t spa_deferred_bpobj; /* deferred-free bplist */ 159 bplist_t spa_free_bplist[TXG_SIZE]; /* bplist of stuff to free */ 160 uberblock_t spa_ubsync; /* last synced uberblock */ 161 uberblock_t spa_uberblock; /* current uberblock */ 162 boolean_t spa_extreme_rewind; /* rewind past deferred frees */ 163 uint64_t spa_last_io; /* lbolt of last non-scan I/O */ 164 kmutex_t spa_scrub_lock; /* resilver/scrub lock */ 165 uint64_t spa_scrub_inflight; /* in-flight scrub I/Os */ 166 kcondvar_t spa_scrub_io_cv; /* scrub I/O completion */ 167 uint8_t spa_scrub_active; /* active or suspended? */ 168 uint8_t spa_scrub_type; /* type of scrub we're doing */ 169 uint8_t spa_scrub_finished; /* indicator to rotate logs */ 170 uint8_t spa_scrub_started; /* started since last boot */ 171 uint8_t spa_scrub_reopen; /* scrub doing vdev_reopen */ 172 uint64_t spa_scan_pass_start; /* start time per pass/reboot */ 173 uint64_t spa_scan_pass_exam; /* examined bytes per pass */ 174 kmutex_t spa_async_lock; /* protect async state */ 175 kthread_t *spa_async_thread; /* thread doing async task */ 176 int spa_async_suspended; /* async tasks suspended */ 177 kcondvar_t spa_async_cv; /* wait for thread_exit() */ 178 uint16_t spa_async_tasks; /* async task mask */ 179 char *spa_root; /* alternate root directory */ 180 uint64_t spa_ena; /* spa-wide ereport ENA */ 181 int spa_last_open_failed; /* error if last open failed */ 182 uint64_t spa_last_ubsync_txg; /* "best" uberblock txg */ 183 uint64_t spa_last_ubsync_txg_ts; /* timestamp from that ub */ 184 uint64_t spa_load_txg; /* ub txg that loaded */ 185 uint64_t spa_load_txg_ts; /* timestamp from that ub */ 186 uint64_t spa_load_meta_errors; /* verify metadata err count */ 187 uint64_t spa_load_data_errors; /* verify data err count */ 188 uint64_t spa_verify_min_txg; /* start txg of verify scrub */ 189 kmutex_t spa_errlog_lock; /* error log lock */ 190 uint64_t spa_errlog_last; /* last error log object */ 191 uint64_t spa_errlog_scrub; /* scrub error log object */ 192 kmutex_t spa_errlist_lock; /* error list/ereport lock */ 193 avl_tree_t spa_errlist_last; /* last error list */ 194 avl_tree_t spa_errlist_scrub; /* scrub error list */ 195 uint64_t spa_deflate; /* should we deflate? */ 196 uint64_t spa_history; /* history object */ 197 kmutex_t spa_history_lock; /* history lock */ 198 vdev_t *spa_pending_vdev; /* pending vdev additions */ 199 kmutex_t spa_props_lock; /* property lock */ 200 uint64_t spa_pool_props_object; /* object for properties */ 201 uint64_t spa_bootfs; /* default boot filesystem */ 202 uint64_t spa_failmode; /* failure mode for the pool */ 203 uint64_t spa_delegation; /* delegation on/off */ 204 list_t spa_config_list; /* previous cache file(s) */ 205 zio_t *spa_async_zio_root; /* root of all async I/O */ 206 zio_t *spa_suspend_zio_root; /* root of all suspended I/O */ 207 kmutex_t spa_suspend_lock; /* protects suspend_zio_root */ 208 kcondvar_t spa_suspend_cv; /* notification of resume */ 209 uint8_t spa_suspended; /* pool is suspended */ 210 uint8_t spa_claiming; /* pool is doing zil_claim() */ 211 boolean_t spa_debug; /* debug enabled? */ 212 boolean_t spa_is_root; /* pool is root */ 213 int spa_minref; /* num refs when first opened */ 214 int spa_mode; /* FREAD | FWRITE */ 215 spa_log_state_t spa_log_state; /* log state */ 216 uint64_t spa_autoexpand; /* lun expansion on/off */ 217 ddt_t *spa_ddt[ZIO_CHECKSUM_FUNCTIONS]; /* in-core DDTs */ 218 uint64_t spa_ddt_stat_object; /* DDT statistics */ 219 uint64_t spa_dedup_ditto; /* dedup ditto threshold */ 220 uint64_t spa_dedup_checksum; /* default dedup checksum */ 221 uint64_t spa_dspace; /* dspace in normal class */ 222 kmutex_t spa_vdev_top_lock; /* dueling offline/remove */ 223 kmutex_t spa_proc_lock; /* protects spa_proc* */ 224 kcondvar_t spa_proc_cv; /* spa_proc_state transitions */ 225 spa_proc_state_t spa_proc_state; /* see definition */ 226 struct proc *spa_proc; /* "zpool-poolname" process */ 227 uint64_t spa_did; /* if procp != p0, did of t1 */ 228 boolean_t spa_autoreplace; /* autoreplace set in open */ 229 int spa_vdev_locks; /* locks grabbed */ 230 uint64_t spa_creation_version; /* version at pool creation */ 231 uint64_t spa_prev_software_version; /* See ub_software_version */ 232 uint64_t spa_feat_for_write_obj; /* required to write to pool */ 233 uint64_t spa_feat_for_read_obj; /* required to read from pool */ 234 uint64_t spa_feat_desc_obj; /* Feature descriptions */ 235 cyclic_id_t spa_deadman_cycid; /* cyclic id */ 236 uint64_t spa_deadman_calls; /* number of deadman calls */ 237 uint64_t spa_sync_starttime; /* starting time fo spa_sync */ 238 uint64_t spa_deadman_synctime; /* deadman expiration timer */ 239 kmutex_t spa_iokstat_lock; /* protects spa_iokstat_* */ 240 struct kstat *spa_iokstat; /* kstat of io to this pool */ 241 /* 242 * spa_refcnt & spa_config_lock must be the last elements 243 * because refcount_t changes size based on compilation options. 244 * In order for the MDB module to function correctly, the other 245 * fields must remain in the same location. 246 */ 247 spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */ 248 refcount_t spa_refcount; /* number of opens */ 249 }; 250 251 extern const char *spa_config_path; 252 253 extern void spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q, 254 task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent); 255 256 #ifdef __cplusplus 257 } 258 #endif 259 260 #endif /* _SYS_SPA_IMPL_H */