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 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 struct dsl_scan; 47 48 /* These macros are for indexing into the zfs_all_blkstats_t. */ 49 #define DMU_OT_DEFERRED DMU_OT_NONE 50 #define DMU_OT_TOTAL DMU_OT_NUMTYPES 51 52 typedef struct zfs_blkstat { 53 uint64_t zb_count; 54 uint64_t zb_asize; 55 uint64_t zb_lsize; 56 uint64_t zb_psize; 57 uint64_t zb_gangs; 58 uint64_t zb_ditto_2_of_2_samevdev; 59 uint64_t zb_ditto_2_of_3_samevdev; 60 uint64_t zb_ditto_3_of_3_samevdev; 61 } zfs_blkstat_t; 62 63 typedef struct zfs_all_blkstats { 64 zfs_blkstat_t zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1]; 65 } zfs_all_blkstats_t; 66 67 68 typedef struct dsl_pool { 69 /* Immutable */ 70 spa_t *dp_spa; 71 struct objset *dp_meta_objset; 72 struct dsl_dir *dp_root_dir; 73 struct dsl_dir *dp_mos_dir; 74 struct dsl_dataset *dp_origin_snap; 75 uint64_t dp_root_dir_obj; 76 struct taskq *dp_vnrele_taskq; 77 78 /* No lock needed - sync context only */ 79 blkptr_t dp_meta_rootbp; 80 list_t dp_synced_datasets; 81 hrtime_t dp_read_overhead; 82 uint64_t dp_throughput; /* bytes per millisec */ 83 uint64_t dp_write_limit; 84 uint64_t dp_tmp_userrefs_obj; 85 86 struct dsl_scan *dp_scan; 87 88 /* Uses dp_lock */ 89 kmutex_t dp_lock; 90 uint64_t dp_space_towrite[TXG_SIZE]; 91 uint64_t dp_tempreserved[TXG_SIZE]; 92 93 /* Has its own locking */ 94 tx_state_t dp_tx; 95 txg_list_t dp_dirty_datasets; 96 txg_list_t dp_dirty_dirs; 97 txg_list_t dp_sync_tasks; 98 99 /* 100 * Protects administrative changes (properties, namespace) 101 * It is only held for write in syncing context. Therefore 102 * syncing context does not need to ever have it for read, since 103 * nobody else could possibly have it for write. 104 */ 105 krwlock_t dp_config_rwlock; 106 107 zfs_all_blkstats_t *dp_blkstats; 108 } dsl_pool_t; 109 110 int dsl_pool_open(spa_t *spa, uint64_t txg, dsl_pool_t **dpp); 111 void dsl_pool_close(dsl_pool_t *dp); 112 dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg); 113 void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg); 114 void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg); 115 int dsl_pool_sync_context(dsl_pool_t *dp); 116 uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree); 117 uint64_t dsl_pool_adjustedfree(dsl_pool_t *dp, boolean_t netfree); 118 int dsl_pool_tempreserve_space(dsl_pool_t *dp, uint64_t space, dmu_tx_t *tx); 119 void dsl_pool_tempreserve_clear(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx); 120 void dsl_pool_memory_pressure(dsl_pool_t *dp); 121 void dsl_pool_willuse_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx); 122 void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp); 123 void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg, 124 const blkptr_t *bpp); 125 int dsl_read(zio_t *pio, spa_t *spa, const blkptr_t *bpp, arc_buf_t *pbuf, 126 arc_done_func_t *done, void *private, int priority, int zio_flags, 127 uint32_t *arc_flags, const zbookmark_t *zb); 128 int dsl_read_nolock(zio_t *pio, spa_t *spa, const blkptr_t *bpp, 129 arc_done_func_t *done, void *private, int priority, int zio_flags, 130 uint32_t *arc_flags, const zbookmark_t *zb); 131 void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx); 132 void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx); 133 134 taskq_t *dsl_pool_vnrele_taskq(dsl_pool_t *dp); 135 136 extern int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj, 137 const char *tag, uint64_t *now, dmu_tx_t *tx); 138 extern int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj, 139 const char *tag, dmu_tx_t *tx); 140 extern void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp); 141 int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **); 142 143 #ifdef __cplusplus 144 } 145 #endif 146 147 #endif /* _SYS_DSL_POOL_H */ 148