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