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_DIR_H 26 #define _SYS_DSL_DIR_H 27 28 #include <sys/dmu.h> 29 #include <sys/dsl_pool.h> 30 #include <sys/dsl_synctask.h> 31 #include <sys/refcount.h> 32 #include <sys/zfs_context.h> 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 struct dsl_dataset; 39 40 typedef enum dd_used { 41 DD_USED_HEAD, 42 DD_USED_SNAP, 43 DD_USED_CHILD, 44 DD_USED_CHILD_RSRV, 45 DD_USED_REFRSRV, 46 DD_USED_NUM 47 } dd_used_t; 48 49 #define DD_FLAG_USED_BREAKDOWN (1<<0) 50 51 typedef struct dsl_dir_phys { 52 uint64_t dd_creation_time; /* not actually used */ 53 uint64_t dd_head_dataset_obj; 54 uint64_t dd_parent_obj; 55 uint64_t dd_origin_obj; 56 uint64_t dd_child_dir_zapobj; 57 /* 58 * how much space our children are accounting for; for leaf 59 * datasets, == physical space used by fs + snaps 60 */ 61 uint64_t dd_used_bytes; 62 uint64_t dd_compressed_bytes; 63 uint64_t dd_uncompressed_bytes; 64 /* Administrative quota setting */ 65 uint64_t dd_quota; 66 /* Administrative reservation setting */ 67 uint64_t dd_reserved; 68 uint64_t dd_props_zapobj; 69 uint64_t dd_deleg_zapobj; /* dataset delegation permissions */ 70 uint64_t dd_flags; 71 uint64_t dd_used_breakdown[DD_USED_NUM]; 72 uint64_t dd_clones; /* dsl_dir objects */ 73 uint64_t dd_pad[13]; /* pad out to 256 bytes for good measure */ 74 } dsl_dir_phys_t; 75 76 struct dsl_dir { 77 /* These are immutable; no lock needed: */ 78 uint64_t dd_object; 79 dsl_dir_phys_t *dd_phys; 80 dmu_buf_t *dd_dbuf; 81 dsl_pool_t *dd_pool; 82 83 /* protected by lock on pool's dp_dirty_dirs list */ 84 txg_node_t dd_dirty_link; 85 86 /* protected by dp_config_rwlock */ 87 dsl_dir_t *dd_parent; 88 89 /* Protected by dd_lock */ 90 kmutex_t dd_lock; 91 list_t dd_prop_cbs; /* list of dsl_prop_cb_record_t's */ 92 timestruc_t dd_snap_cmtime; /* last time snapshot namespace changed */ 93 uint64_t dd_origin_txg; 94 95 /* gross estimate of space used by in-flight tx's */ 96 uint64_t dd_tempreserved[TXG_SIZE]; 97 /* amount of space we expect to write; == amount of dirty data */ 98 int64_t dd_space_towrite[TXG_SIZE]; 99 100 /* protected by dd_lock; keep at end of struct for better locality */ 101 char dd_myname[MAXNAMELEN]; 102 }; 103 104 void dsl_dir_close(dsl_dir_t *dd, void *tag); 105 int dsl_dir_open(const char *name, void *tag, dsl_dir_t **, const char **tail); 106 int dsl_dir_open_spa(spa_t *spa, const char *name, void *tag, dsl_dir_t **, 107 const char **tailp); 108 int dsl_dir_open_obj(dsl_pool_t *dp, uint64_t ddobj, 109 const char *tail, void *tag, dsl_dir_t **); 110 void dsl_dir_name(dsl_dir_t *dd, char *buf); 111 int dsl_dir_namelen(dsl_dir_t *dd); 112 uint64_t dsl_dir_create_sync(dsl_pool_t *dp, dsl_dir_t *pds, 113 const char *name, dmu_tx_t *tx); 114 dsl_checkfunc_t dsl_dir_destroy_check; 115 dsl_syncfunc_t dsl_dir_destroy_sync; 116 void dsl_dir_stats(dsl_dir_t *dd, nvlist_t *nv); 117 uint64_t dsl_dir_space_available(dsl_dir_t *dd, 118 dsl_dir_t *ancestor, int64_t delta, int ondiskonly); 119 void dsl_dir_dirty(dsl_dir_t *dd, dmu_tx_t *tx); 120 void dsl_dir_sync(dsl_dir_t *dd, dmu_tx_t *tx); 121 int dsl_dir_tempreserve_space(dsl_dir_t *dd, uint64_t mem, 122 uint64_t asize, uint64_t fsize, uint64_t usize, void **tr_cookiep, 123 dmu_tx_t *tx); 124 void dsl_dir_tempreserve_clear(void *tr_cookie, dmu_tx_t *tx); 125 void dsl_dir_willuse_space(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx); 126 void dsl_dir_diduse_space(dsl_dir_t *dd, dd_used_t type, 127 int64_t used, int64_t compressed, int64_t uncompressed, dmu_tx_t *tx); 128 void dsl_dir_transfer_space(dsl_dir_t *dd, int64_t delta, 129 dd_used_t oldtype, dd_used_t newtype, dmu_tx_t *tx); 130 int dsl_dir_set_quota(const char *ddname, zprop_source_t source, 131 uint64_t quota); 132 int dsl_dir_set_reservation(const char *ddname, zprop_source_t source, 133 uint64_t reservation); 134 int dsl_dir_rename(dsl_dir_t *dd, const char *newname); 135 int dsl_dir_transfer_possible(dsl_dir_t *sdd, dsl_dir_t *tdd, uint64_t space); 136 int dsl_dir_set_reservation_check(void *arg1, void *arg2, dmu_tx_t *tx); 137 boolean_t dsl_dir_is_clone(dsl_dir_t *dd); 138 void dsl_dir_new_refreservation(dsl_dir_t *dd, struct dsl_dataset *ds, 139 uint64_t reservation, cred_t *cr, dmu_tx_t *tx); 140 void dsl_dir_snap_cmtime_update(dsl_dir_t *dd); 141 timestruc_t dsl_dir_snap_cmtime(dsl_dir_t *dd); 142 143 /* internal reserved dir name */ 144 #define MOS_DIR_NAME "$MOS" 145 #define ORIGIN_DIR_NAME "$ORIGIN" 146 #define XLATION_DIR_NAME "$XLATION" 147 #define FREE_DIR_NAME "$FREE" 148 149 #ifdef ZFS_DEBUG 150 #define dprintf_dd(dd, fmt, ...) do { \ 151 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ 152 char *__ds_name = kmem_alloc(MAXNAMELEN + strlen(MOS_DIR_NAME) + 1, \ 153 KM_SLEEP); \ 154 dsl_dir_name(dd, __ds_name); \ 155 dprintf("dd=%s " fmt, __ds_name, __VA_ARGS__); \ 156 kmem_free(__ds_name, MAXNAMELEN + strlen(MOS_DIR_NAME) + 1); \ 157 } \ 158 _NOTE(CONSTCOND) } while (0) 159 #else 160 #define dprintf_dd(dd, fmt, ...) 161 #endif 162 163 #ifdef __cplusplus 164 } 165 #endif 166 167 #endif /* _SYS_DSL_DIR_H */ 168