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_DSL_POOL_H 26 #define _SYS_DSL_POOL_H 27 28 #include <sys/spa.h> 29 #include <sys/txg.h> 30 #include <sys/txg_impl.h> 31 #include <sys/zfs_context.h> 32 #include <sys/zio.h> 33 #include <sys/dnode.h> 34 #include <sys/ddt.h> 35 #include <sys/arc.h> 36 #include <sys/bpobj.h> 37 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 struct objset; 43 struct dsl_dir; 44 struct dsl_dataset; 45 struct dsl_pool; 46 struct dmu_tx; 47 struct dsl_scan; 48 49 /* These macros are for indexing into the zfs_all_blkstats_t. */ 50 #define DMU_OT_DEFERRED DMU_OT_NONE 51 #define DMU_OT_TOTAL DMU_OT_NUMTYPES 52 53 typedef struct zfs_blkstat { 54 uint64_t zb_count; 55 uint64_t zb_asize; 56 uint64_t zb_lsize; 57 uint64_t zb_psize; 58 uint64_t zb_gangs; 59 uint64_t zb_ditto_2_of_2_samevdev; 60 uint64_t zb_ditto_2_of_3_samevdev; 61 uint64_t zb_ditto_3_of_3_samevdev; 62 } zfs_blkstat_t; 63 64 typedef struct zfs_all_blkstats { 65 zfs_blkstat_t zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1]; 66 } zfs_all_blkstats_t; 67 68 69 typedef struct dsl_pool { 70 /* Immutable */ 71 spa_t *dp_spa; 72 struct objset *dp_meta_objset; 73 struct dsl_dir *dp_root_dir; 74 struct dsl_dir *dp_mos_dir; 75 struct dsl_dir *dp_free_dir; 76 struct dsl_dataset *dp_origin_snap; 77 uint64_t dp_root_dir_obj; 78 struct taskq *dp_vnrele_taskq; 79 80 /* No lock needed - sync context only */ 81 blkptr_t dp_meta_rootbp; 82 list_t dp_synced_datasets; 83 hrtime_t dp_read_overhead; 84 uint64_t dp_throughput; /* bytes per millisec */ 85 uint64_t dp_write_limit; 86 uint64_t dp_tmp_userrefs_obj; 87 bpobj_t dp_free_bpobj; 88 89 struct dsl_scan *dp_scan; 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 /* Has its own locking */ 97 tx_state_t dp_tx; 98 txg_list_t dp_dirty_datasets; 99 txg_list_t dp_dirty_dirs; 100 txg_list_t dp_sync_tasks; 101 102 /* 103 * Protects administrative changes (properties, namespace) 104 * It is only held for write in syncing context. Therefore 105 * syncing context does not need to ever have it for read, since 106 * nobody else could possibly have it for write. 107 */ 108 krwlock_t dp_config_rwlock; 109 110 zfs_all_blkstats_t *dp_blkstats; 111 } dsl_pool_t; 112 113 int dsl_pool_open(spa_t *spa, uint64_t txg, dsl_pool_t **dpp); 114 void dsl_pool_close(dsl_pool_t *dp); 115 dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg); 116 void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg); 117 void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg); 118 int dsl_pool_sync_context(dsl_pool_t *dp); 119 uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree); 120 uint64_t dsl_pool_adjustedfree(dsl_pool_t *dp, boolean_t netfree); 121 int dsl_pool_tempreserve_space(dsl_pool_t *dp, uint64_t space, dmu_tx_t *tx); 122 void dsl_pool_tempreserve_clear(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx); 123 void dsl_pool_memory_pressure(dsl_pool_t *dp); 124 void dsl_pool_willuse_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx); 125 void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp); 126 void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg, 127 const blkptr_t *bpp); 128 int dsl_read(zio_t *pio, spa_t *spa, const blkptr_t *bpp, arc_buf_t *pbuf, 129 arc_done_func_t *done, void *private, int priority, int zio_flags, 130 uint32_t *arc_flags, const zbookmark_t *zb); 131 int dsl_read_nolock(zio_t *pio, spa_t *spa, const blkptr_t *bpp, 132 arc_done_func_t *done, void *private, int priority, int zio_flags, 133 uint32_t *arc_flags, const zbookmark_t *zb); 134 void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx); 135 void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx); 136 void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx); 137 138 taskq_t *dsl_pool_vnrele_taskq(dsl_pool_t *dp); 139 140 extern int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj, 141 const char *tag, uint64_t *now, dmu_tx_t *tx); 142 extern int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj, 143 const char *tag, dmu_tx_t *tx); 144 extern void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp); 145 int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **); 146 147 #ifdef __cplusplus 148 } 149 #endif 150 151 #endif /* _SYS_DSL_POOL_H */ 152