Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/include/sys/dsl_pool.h
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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 https://opensource.org/licenses/CDDL-1.0. 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, 2018 by Delphix. All rights reserved. 24 * Copyright 2016 Nexenta Systems, Inc. All rights reserved. 25 */ 26 27 #ifndef _SYS_DSL_POOL_H 28 #define _SYS_DSL_POOL_H 29 30 #include <sys/spa.h> 31 #include <sys/txg.h> 32 #include <sys/txg_impl.h> 33 #include <sys/zfs_context.h> 34 #include <sys/zio.h> 35 #include <sys/dnode.h> 36 #include <sys/ddt.h> 37 #include <sys/arc.h> 38 #include <sys/bpobj.h> 39 #include <sys/bptree.h> 40 #include <sys/rrwlock.h> 41 #include <sys/dsl_synctask.h> 42 #include <sys/mmp.h> 43 #include <sys/aggsum.h> 44 45 #ifdef __cplusplus 46 extern "C" { 47 #endif 48 49 extern int zfs_txg_synctime_ms; 50 51 struct objset; 52 struct dsl_dir; 53 struct dsl_dataset; 54 struct dsl_pool; 55 struct dmu_tx; 56 struct dsl_scan; 57 struct dsl_crypto_params; 58 struct dsl_deadlist; 59 60 extern uint64_t zfs_dirty_data_max; 61 extern uint64_t zfs_dirty_data_max_max; 62 extern uint64_t zfs_wrlog_data_max; 63 extern uint_t zfs_dirty_data_max_percent; 64 extern uint_t zfs_dirty_data_max_max_percent; 65 extern uint_t zfs_delay_min_dirty_percent; 66 extern uint64_t zfs_delay_scale; 67 68 /* These macros are for indexing into the zfs_all_blkstats_t. */ 69 #define DMU_OT_DEFERRED DMU_OT_NONE 70 #define DMU_OT_OTHER DMU_OT_NUMTYPES /* place holder for DMU_OT() types */ 71 #define DMU_OT_TOTAL (DMU_OT_NUMTYPES + 1) 72 73 typedef struct zfs_blkstat { 74 uint64_t zb_count; 75 uint64_t zb_asize; 76 uint64_t zb_lsize; 77 uint64_t zb_psize; 78 uint64_t zb_gangs; 79 uint64_t zb_ditto_2_of_2_samevdev; 80 uint64_t zb_ditto_2_of_3_samevdev; 81 uint64_t zb_ditto_3_of_3_samevdev; 82 } zfs_blkstat_t; 83 84 typedef struct zfs_all_blkstats { 85 zfs_blkstat_t zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1]; 86 } zfs_all_blkstats_t; 87 88 89 typedef struct dsl_pool { 90 /* Immutable */ 91 spa_t *dp_spa; 92 struct objset *dp_meta_objset; 93 struct dsl_dir *dp_root_dir; 94 struct dsl_dir *dp_mos_dir; 95 struct dsl_dir *dp_free_dir; 96 struct dsl_dir *dp_leak_dir; 97 struct dsl_dataset *dp_origin_snap; 98 uint64_t dp_root_dir_obj; 99 struct taskq *dp_zrele_taskq; 100 struct taskq *dp_unlinked_drain_taskq; 101 102 /* No lock needed - sync context only */ 103 blkptr_t dp_meta_rootbp; 104 uint64_t dp_tmp_userrefs_obj; 105 bpobj_t dp_free_bpobj; 106 uint64_t dp_bptree_obj; 107 uint64_t dp_empty_bpobj; 108 bpobj_t dp_obsolete_bpobj; 109 110 struct dsl_scan *dp_scan; 111 112 /* Uses dp_lock */ 113 kmutex_t dp_lock; 114 kcondvar_t dp_spaceavail_cv; 115 uint64_t dp_dirty_pertxg[TXG_SIZE]; 116 uint64_t dp_dirty_total; 117 uint64_t dp_long_free_dirty_pertxg[TXG_SIZE]; 118 uint64_t dp_mos_used_delta; 119 uint64_t dp_mos_compressed_delta; 120 uint64_t dp_mos_uncompressed_delta; 121 122 aggsum_t dp_wrlog_pertxg[TXG_SIZE]; 123 aggsum_t dp_wrlog_total; 124 125 /* 126 * Time of most recently scheduled (furthest in the future) 127 * wakeup for delayed transactions. 128 */ 129 hrtime_t dp_last_wakeup; 130 131 /* Has its own locking */ 132 tx_state_t dp_tx; 133 txg_list_t dp_dirty_datasets; 134 txg_list_t dp_dirty_zilogs; 135 txg_list_t dp_dirty_dirs; 136 txg_list_t dp_sync_tasks; 137 txg_list_t dp_early_sync_tasks; 138 taskq_t *dp_sync_taskq; 139 taskq_t *dp_zil_clean_taskq; 140 141 /* 142 * Protects administrative changes (properties, namespace) 143 * 144 * It is only held for write in syncing context. Therefore 145 * syncing context does not need to ever have it for read, since 146 * nobody else could possibly have it for write. 147 */ 148 rrwlock_t dp_config_rwlock; 149 150 zfs_all_blkstats_t *dp_blkstats; 151 } dsl_pool_t; 152 153 int dsl_pool_init(spa_t *spa, uint64_t txg, dsl_pool_t **dpp); 154 int dsl_pool_open(dsl_pool_t *dp); 155 void dsl_pool_close(dsl_pool_t *dp); 156 dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops, 157 struct dsl_crypto_params *dcp, uint64_t txg); 158 void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg); 159 void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg); 160 int dsl_pool_sync_context(dsl_pool_t *dp); 161 uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, zfs_space_check_t slop_policy); 162 uint64_t dsl_pool_unreserved_space(dsl_pool_t *dp, 163 zfs_space_check_t slop_policy); 164 uint64_t dsl_pool_deferred_space(dsl_pool_t *dp); 165 void dsl_pool_wrlog_count(dsl_pool_t *dp, int64_t size, uint64_t txg); 166 boolean_t dsl_pool_need_wrlog_delay(dsl_pool_t *dp); 167 void dsl_pool_dirty_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx); 168 void dsl_pool_undirty_space(dsl_pool_t *dp, int64_t space, uint64_t txg); 169 void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp); 170 void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg, 171 const blkptr_t *bpp); 172 void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx); 173 void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx); 174 void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx); 175 void dsl_pool_mos_diduse_space(dsl_pool_t *dp, 176 int64_t used, int64_t comp, int64_t uncomp); 177 void dsl_pool_ckpoint_diduse_space(dsl_pool_t *dp, 178 int64_t used, int64_t comp, int64_t uncomp); 179 boolean_t dsl_pool_need_dirty_delay(dsl_pool_t *dp); 180 void dsl_pool_config_enter(dsl_pool_t *dp, const void *tag); 181 void dsl_pool_config_enter_prio(dsl_pool_t *dp, const void *tag); 182 void dsl_pool_config_exit(dsl_pool_t *dp, const void *tag); 183 boolean_t dsl_pool_config_held(dsl_pool_t *dp); 184 boolean_t dsl_pool_config_held_writer(dsl_pool_t *dp); 185 186 taskq_t *dsl_pool_zrele_taskq(dsl_pool_t *dp); 187 taskq_t *dsl_pool_unlinked_drain_taskq(dsl_pool_t *dp); 188 189 int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj, 190 const char *tag, uint64_t now, dmu_tx_t *tx); 191 int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj, 192 const char *tag, dmu_tx_t *tx); 193 void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp); 194 int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **); 195 int dsl_pool_hold(const char *name, const void *tag, dsl_pool_t **dp); 196 void dsl_pool_rele(dsl_pool_t *dp, const void *tag); 197 198 void dsl_pool_create_obsolete_bpobj(dsl_pool_t *dp, dmu_tx_t *tx); 199 void dsl_pool_destroy_obsolete_bpobj(dsl_pool_t *dp, dmu_tx_t *tx); 200 201 #ifdef __cplusplus 202 } 203 #endif 204 205 #endif /* _SYS_DSL_POOL_H */
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