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 by Delphix. All rights reserved. 24 */ 25 26 #ifndef _SYS_SPA_IMPL_H 27 #define _SYS_SPA_IMPL_H 28 29 #include <sys/spa.h> 30 #include <sys/vdev.h> 31 #include <sys/metaslab.h> 32 #include <sys/dmu.h> 33 #include <sys/dsl_pool.h> 34 #include <sys/uberblock_impl.h> 35 #include <sys/zfs_context.h> 36 #include <sys/avl.h> 37 #include <sys/refcount.h> 38 #include <sys/bplist.h> 39 #include <sys/bpobj.h> 40 41 #ifdef __cplusplus 42 extern "C" { 43 #endif 44 45 typedef struct spa_error_entry { 46 zbookmark_t se_bookmark; 47 char *se_name; 48 avl_node_t se_avl; 49 } spa_error_entry_t; 50 51 typedef struct spa_history_phys { 52 uint64_t sh_pool_create_len; /* ending offset of zpool create */ 53 uint64_t sh_phys_max_off; /* physical EOF */ 54 uint64_t sh_bof; /* logical BOF */ 55 uint64_t sh_eof; /* logical EOF */ 56 uint64_t sh_records_lost; /* num of records overwritten */ 57 } spa_history_phys_t; 58 59 struct spa_aux_vdev { 60 uint64_t sav_object; /* MOS object for device list */ 61 nvlist_t *sav_config; /* cached device config */ 62 vdev_t **sav_vdevs; /* devices */ 63 int sav_count; /* number devices */ 64 boolean_t sav_sync; /* sync the device list */ 65 nvlist_t **sav_pending; /* pending device additions */ 66 uint_t sav_npending; /* # pending devices */ 67 }; 68 69 typedef struct spa_config_lock { 70 kmutex_t scl_lock; 71 kthread_t *scl_writer; 72 int scl_write_wanted; 73 kcondvar_t scl_cv; 74 refcount_t scl_count; 75 } spa_config_lock_t; 76 77 typedef struct spa_config_dirent { 78 list_node_t scd_link; 79 char *scd_path; 80 } spa_config_dirent_t; 81 82 enum zio_taskq_type { 83 ZIO_TASKQ_ISSUE = 0, 84 ZIO_TASKQ_ISSUE_HIGH, 85 ZIO_TASKQ_INTERRUPT, 86 ZIO_TASKQ_INTERRUPT_HIGH, 87 ZIO_TASKQ_TYPES 88 }; 89 90 /* 91 * State machine for the zpool-pooname process. The states transitions 92 * are done as follows: 93 * 94 * From To Routine 95 * PROC_NONE -> PROC_CREATED spa_activate() 96 * PROC_CREATED -> PROC_ACTIVE spa_thread() 97 * PROC_ACTIVE -> PROC_DEACTIVATE spa_deactivate() 98 * PROC_DEACTIVATE -> PROC_GONE spa_thread() 99 * PROC_GONE -> PROC_NONE spa_deactivate() 100 */ 101 typedef enum spa_proc_state { 102 SPA_PROC_NONE, /* spa_proc = &p0, no process created */ 103 SPA_PROC_CREATED, /* spa_activate() has proc, is waiting */ 104 SPA_PROC_ACTIVE, /* taskqs created, spa_proc set */ 105 SPA_PROC_DEACTIVATE, /* spa_deactivate() requests process exit */ 106 SPA_PROC_GONE /* spa_thread() is exiting, spa_proc = &p0 */ 107 } spa_proc_state_t; 108 109 struct spa { 110 /* 111 * Fields protected by spa_namespace_lock. 112 */ 113 char spa_name[MAXNAMELEN]; /* pool name */ 114 avl_node_t spa_avl; /* node in spa_namespace_avl */ 115 nvlist_t *spa_config; /* last synced config */ 116 nvlist_t *spa_config_syncing; /* currently syncing config */ 117 nvlist_t *spa_config_splitting; /* config for splitting */ 118 nvlist_t *spa_load_info; /* info and errors from load */ 119 uint64_t spa_config_txg; /* txg of last config change */ 120 int spa_sync_pass; /* iterate-to-convergence */ 121 pool_state_t spa_state; /* pool state */ 122 int spa_inject_ref; /* injection references */ 123 uint8_t spa_sync_on; /* sync threads are running */ 124 spa_load_state_t spa_load_state; /* current load operation */ 125 uint64_t spa_import_flags; /* import specific flags */ 126 taskq_t *spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES]; 127 dsl_pool_t *spa_dsl_pool; 128 metaslab_class_t *spa_normal_class; /* normal data class */ 129 metaslab_class_t *spa_log_class; /* intent log data class */ 130 uint64_t spa_first_txg; /* first txg after spa_open() */ 131 uint64_t spa_final_txg; /* txg of export/destroy */ 132 uint64_t spa_freeze_txg; /* freeze pool at this txg */ 133 uint64_t spa_load_max_txg; /* best initial ub_txg */ 134 uint64_t spa_claim_max_txg; /* highest claimed birth txg */ 135 timespec_t spa_loaded_ts; /* 1st successful open time */ 136 objset_t *spa_meta_objset; /* copy of dp->dp_meta_objset */ 137 txg_list_t spa_vdev_txg_list; /* per-txg dirty vdev list */ 138 vdev_t *spa_root_vdev; /* top-level vdev container */ 139 uint64_t spa_load_guid; /* initial guid for spa_load */ 140 list_t spa_config_dirty_list; /* vdevs with dirty config */ 141 list_t spa_state_dirty_list; /* vdevs with dirty state */ 142 spa_aux_vdev_t spa_spares; /* hot spares */ 143 spa_aux_vdev_t spa_l2cache; /* L2ARC cache devices */ 144 uint64_t spa_config_object; /* MOS object for pool config */ 145 uint64_t spa_config_generation; /* config generation number */ 146 uint64_t spa_syncing_txg; /* txg currently syncing */ 147 bpobj_t spa_deferred_bpobj; /* deferred-free bplist */ 148 bplist_t spa_free_bplist[TXG_SIZE]; /* bplist of stuff to free */ 149 uberblock_t spa_ubsync; /* last synced uberblock */ 150 uberblock_t spa_uberblock; /* current uberblock */ 151 boolean_t spa_extreme_rewind; /* rewind past deferred frees */ 152 uint64_t spa_last_io; /* lbolt of last non-scan I/O */ 153 kmutex_t spa_scrub_lock; /* resilver/scrub lock */ 154 uint64_t spa_scrub_inflight; /* in-flight scrub I/Os */ 155 kcondvar_t spa_scrub_io_cv; /* scrub I/O completion */ 156 uint8_t spa_scrub_active; /* active or suspended? */ 157 uint8_t spa_scrub_type; /* type of scrub we're doing */ 158 uint8_t spa_scrub_finished; /* indicator to rotate logs */ 159 uint8_t spa_scrub_started; /* started since last boot */ 160 uint8_t spa_scrub_reopen; /* scrub doing vdev_reopen */ 161 uint64_t spa_scan_pass_start; /* start time per pass/reboot */ 162 uint64_t spa_scan_pass_exam; /* examined bytes per pass */ 163 kmutex_t spa_async_lock; /* protect async state */ 164 kthread_t *spa_async_thread; /* thread doing async task */ 165 int spa_async_suspended; /* async tasks suspended */ 166 kcondvar_t spa_async_cv; /* wait for thread_exit() */ 167 uint16_t spa_async_tasks; /* async task mask */ 168 char *spa_root; /* alternate root directory */ 169 uint64_t spa_ena; /* spa-wide ereport ENA */ 170 int spa_last_open_failed; /* error if last open failed */ 171 uint64_t spa_last_ubsync_txg; /* "best" uberblock txg */ 172 uint64_t spa_last_ubsync_txg_ts; /* timestamp from that ub */ 173 uint64_t spa_load_txg; /* ub txg that loaded */ 174 uint64_t spa_load_txg_ts; /* timestamp from that ub */ 175 uint64_t spa_load_meta_errors; /* verify metadata err count */ 176 uint64_t spa_load_data_errors; /* verify data err count */ 177 uint64_t spa_verify_min_txg; /* start txg of verify scrub */ 178 kmutex_t spa_errlog_lock; /* error log lock */ 179 uint64_t spa_errlog_last; /* last error log object */ 180 uint64_t spa_errlog_scrub; /* scrub error log object */ 181 kmutex_t spa_errlist_lock; /* error list/ereport lock */ 182 avl_tree_t spa_errlist_last; /* last error list */ 183 avl_tree_t spa_errlist_scrub; /* scrub error list */ 184 uint64_t spa_deflate; /* should we deflate? */ 185 uint64_t spa_history; /* history object */ 186 kmutex_t spa_history_lock; /* history lock */ 187 vdev_t *spa_pending_vdev; /* pending vdev additions */ 188 kmutex_t spa_props_lock; /* property lock */ 189 uint64_t spa_pool_props_object; /* object for properties */ 190 uint64_t spa_bootfs; /* default boot filesystem */ 191 uint64_t spa_failmode; /* failure mode for the pool */ 192 uint64_t spa_delegation; /* delegation on/off */ 193 list_t spa_config_list; /* previous cache file(s) */ 194 zio_t *spa_async_zio_root; /* root of all async I/O */ 195 zio_t *spa_suspend_zio_root; /* root of all suspended I/O */ 196 kmutex_t spa_suspend_lock; /* protects suspend_zio_root */ 197 kcondvar_t spa_suspend_cv; /* notification of resume */ 198 uint8_t spa_suspended; /* pool is suspended */ 199 uint8_t spa_claiming; /* pool is doing zil_claim() */ 200 boolean_t spa_debug; /* debug enabled? */ 201 boolean_t spa_is_root; /* pool is root */ 202 int spa_minref; /* num refs when first opened */ 203 int spa_mode; /* FREAD | FWRITE */ 204 spa_log_state_t spa_log_state; /* log state */ 205 uint64_t spa_autoexpand; /* lun expansion on/off */ 206 ddt_t *spa_ddt[ZIO_CHECKSUM_FUNCTIONS]; /* in-core DDTs */ 207 uint64_t spa_ddt_stat_object; /* DDT statistics */ 208 uint64_t spa_dedup_ditto; /* dedup ditto threshold */ 209 uint64_t spa_dedup_checksum; /* default dedup checksum */ 210 uint64_t spa_dspace; /* dspace in normal class */ 211 kmutex_t spa_vdev_top_lock; /* dueling offline/remove */ 212 kmutex_t spa_proc_lock; /* protects spa_proc* */ 213 kcondvar_t spa_proc_cv; /* spa_proc_state transitions */ 214 spa_proc_state_t spa_proc_state; /* see definition */ 215 struct proc *spa_proc; /* "zpool-poolname" process */ 216 uint64_t spa_did; /* if procp != p0, did of t1 */ 217 boolean_t spa_autoreplace; /* autoreplace set in open */ 218 int spa_vdev_locks; /* locks grabbed */ 219 uint64_t spa_creation_version; /* version at pool creation */ 220 uint64_t spa_prev_software_version; 221 /* 222 * spa_refcnt & spa_config_lock must be the last elements 223 * because refcount_t changes size based on compilation options. 224 * In order for the MDB module to function correctly, the other 225 * fields must remain in the same location. 226 */ 227 spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */ 228 refcount_t spa_refcount; /* number of opens */ 229 }; 230 231 extern const char *spa_config_path; 232 233 #ifdef __cplusplus 234 } 235 #endif 236 237 #endif /* _SYS_SPA_IMPL_H */ 238