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 2010 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_DSL_POOL_H 27 #define _SYS_DSL_POOL_H 28 29 #include <sys/spa.h> 30 #include <sys/txg.h> 31 #include <sys/txg_impl.h> 32 #include <sys/zfs_context.h> 33 #include <sys/zio.h> 34 #include <sys/dnode.h> 35 #include <sys/ddt.h> 36 37 #ifdef __cplusplus 38 extern "C" { 39 #endif 40 41 struct objset; 42 struct dsl_dir; 43 struct dsl_dataset; 44 struct dsl_pool; 45 struct dmu_tx; 46 47 enum scrub_func { 48 SCRUB_FUNC_NONE, 49 SCRUB_FUNC_CLEAN, 50 SCRUB_FUNC_NUMFUNCS 51 }; 52 53 /* These macros are for indexing into the zfs_all_blkstats_t. */ 54 #define DMU_OT_DEFERRED DMU_OT_NONE 55 #define DMU_OT_TOTAL DMU_OT_NUMTYPES 56 57 typedef struct zfs_blkstat { 58 uint64_t zb_count; 59 uint64_t zb_asize; 60 uint64_t zb_lsize; 61 uint64_t zb_psize; 62 uint64_t zb_gangs; 63 uint64_t zb_ditto_2_of_2_samevdev; 64 uint64_t zb_ditto_2_of_3_samevdev; 65 uint64_t zb_ditto_3_of_3_samevdev; 66 } zfs_blkstat_t; 67 68 typedef struct zfs_all_blkstats { 69 zfs_blkstat_t zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1]; 70 } zfs_all_blkstats_t; 71 72 73 typedef struct dsl_pool { 74 /* Immutable */ 75 spa_t *dp_spa; 76 struct objset *dp_meta_objset; 77 struct dsl_dir *dp_root_dir; 78 struct dsl_dir *dp_mos_dir; 79 struct dsl_dataset *dp_origin_snap; 80 uint64_t dp_root_dir_obj; 81 struct taskq *dp_vnrele_taskq; 82 83 /* No lock needed - sync context only */ 84 blkptr_t dp_meta_rootbp; 85 list_t dp_synced_datasets; 86 hrtime_t dp_read_overhead; 87 uint64_t dp_throughput; /* bytes per millisec */ 88 uint64_t dp_write_limit; 89 uint64_t dp_tmp_userrefs_obj; 90 91 /* Uses dp_lock */ 92 kmutex_t dp_lock; 93 uint64_t dp_space_towrite[TXG_SIZE]; 94 uint64_t dp_tempreserved[TXG_SIZE]; 95 96 enum scrub_func dp_scrub_func; 97 uint64_t dp_scrub_queue_obj; 98 uint64_t dp_scrub_min_txg; 99 uint64_t dp_scrub_max_txg; 100 uint64_t dp_scrub_start_time; 101 uint64_t dp_scrub_ddt_class_max; 102 zbookmark_t dp_scrub_bookmark; 103 ddt_bookmark_t dp_scrub_ddt_bookmark; 104 boolean_t dp_scrub_pausing; 105 boolean_t dp_scrub_isresilver; 106 boolean_t dp_scrub_restart; 107 kmutex_t dp_scrub_cancel_lock; /* protects dp_scrub_restart */ 108 zio_t *dp_scrub_prefetch_zio_root; 109 110 /* Has its own locking */ 111 tx_state_t dp_tx; 112 txg_list_t dp_dirty_datasets; 113 txg_list_t dp_dirty_dirs; 114 txg_list_t dp_sync_tasks; 115 116 /* 117 * Protects administrative changes (properties, namespace) 118 * It is only held for write in syncing context. Therefore 119 * syncing context does not need to ever have it for read, since 120 * nobody else could possibly have it for write. 121 */ 122 krwlock_t dp_config_rwlock; 123 124 zfs_all_blkstats_t *dp_blkstats; 125 } dsl_pool_t; 126 127 int dsl_pool_open(spa_t *spa, uint64_t txg, dsl_pool_t **dpp); 128 void dsl_pool_close(dsl_pool_t *dp); 129 dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg); 130 void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg); 131 void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg); 132 int dsl_pool_sync_context(dsl_pool_t *dp); 133 uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree); 134 uint64_t dsl_pool_adjustedfree(dsl_pool_t *dp, boolean_t netfree); 135 int dsl_pool_tempreserve_space(dsl_pool_t *dp, uint64_t space, dmu_tx_t *tx); 136 void dsl_pool_tempreserve_clear(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx); 137 void dsl_pool_memory_pressure(dsl_pool_t *dp); 138 void dsl_pool_willuse_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx); 139 void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp); 140 void dsl_pool_ds_destroyed(struct dsl_dataset *ds, struct dmu_tx *tx); 141 void dsl_pool_ds_snapshotted(struct dsl_dataset *ds, struct dmu_tx *tx); 142 void dsl_pool_ds_clone_swapped(struct dsl_dataset *ds1, struct dsl_dataset *ds2, 143 struct dmu_tx *tx); 144 void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx); 145 void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx); 146 147 int dsl_pool_scrub_cancel(dsl_pool_t *dp); 148 int dsl_pool_scrub_clean(dsl_pool_t *dp); 149 void dsl_pool_scrub_sync(dsl_pool_t *dp, dmu_tx_t *tx); 150 void dsl_pool_scrub_restart(dsl_pool_t *dp); 151 void dsl_pool_scrub_ddt_entry(dsl_pool_t *dp, enum zio_checksum checksum, 152 const ddt_entry_t *dde); 153 154 taskq_t *dsl_pool_vnrele_taskq(dsl_pool_t *dp); 155 156 extern int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj, 157 const char *tag, uint64_t *now, dmu_tx_t *tx); 158 extern int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj, 159 const char *tag, dmu_tx_t *tx); 160 extern void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp); 161 162 #ifdef __cplusplus 163 } 164 #endif 165 166 #endif /* _SYS_DSL_POOL_H */ 167