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 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_DSL_DIR_H 27 #define _SYS_DSL_DIR_H 28 29 #include <sys/dmu.h> 30 #include <sys/dsl_pool.h> 31 #include <sys/dsl_synctask.h> 32 #include <sys/refcount.h> 33 #include <sys/zfs_context.h> 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 struct dsl_dataset; 40 41 typedef enum dd_used { 42 DD_USED_HEAD, 43 DD_USED_SNAP, 44 DD_USED_CHILD, 45 DD_USED_CHILD_RSRV, 46 DD_USED_REFRSRV, 47 DD_USED_NUM 48 } dd_used_t; 49 50 #define DD_FLAG_USED_BREAKDOWN (1<<0) 51 52 typedef struct dsl_dir_phys { 53 uint64_t dd_creation_time; /* not actually used */ 54 uint64_t dd_head_dataset_obj; 55 uint64_t dd_parent_obj; 56 uint64_t dd_origin_obj; 57 uint64_t dd_child_dir_zapobj; 58 /* 59 * how much space our children are accounting for; for leaf 60 * datasets, == physical space used by fs + snaps 61 */ 62 uint64_t dd_used_bytes; 63 uint64_t dd_compressed_bytes; 64 uint64_t dd_uncompressed_bytes; 65 /* Administrative quota setting */ 66 uint64_t dd_quota; 67 /* Administrative reservation setting */ 68 uint64_t dd_reserved; 69 uint64_t dd_props_zapobj; 70 uint64_t dd_deleg_zapobj; /* dataset delegation permissions */ 71 uint64_t dd_flags; 72 uint64_t dd_used_breakdown[DD_USED_NUM]; 73 uint64_t dd_pad[14]; /* 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 93 /* gross estimate of space used by in-flight tx's */ 94 uint64_t dd_tempreserved[TXG_SIZE]; 95 /* amount of space we expect to write; == amount of dirty data */ 96 int64_t dd_space_towrite[TXG_SIZE]; 97 98 /* protected by dd_lock; keep at end of struct for better locality */ 99 char dd_myname[MAXNAMELEN]; 100 }; 101 102 void dsl_dir_close(dsl_dir_t *dd, void *tag); 103 int dsl_dir_open(const char *name, void *tag, dsl_dir_t **, const char **tail); 104 int dsl_dir_open_spa(spa_t *spa, const char *name, void *tag, dsl_dir_t **, 105 const char **tailp); 106 int dsl_dir_open_obj(dsl_pool_t *dp, uint64_t ddobj, 107 const char *tail, void *tag, dsl_dir_t **); 108 void dsl_dir_name(dsl_dir_t *dd, char *buf); 109 int dsl_dir_namelen(dsl_dir_t *dd); 110 int dsl_dir_is_private(dsl_dir_t *dd); 111 uint64_t dsl_dir_create_sync(dsl_pool_t *dp, dsl_dir_t *pds, 112 const char *name, dmu_tx_t *tx); 113 dsl_checkfunc_t dsl_dir_destroy_check; 114 dsl_syncfunc_t dsl_dir_destroy_sync; 115 void dsl_dir_stats(dsl_dir_t *dd, nvlist_t *nv); 116 uint64_t dsl_dir_space_available(dsl_dir_t *dd, 117 dsl_dir_t *ancestor, int64_t delta, int ondiskonly); 118 void dsl_dir_dirty(dsl_dir_t *dd, dmu_tx_t *tx); 119 void dsl_dir_sync(dsl_dir_t *dd, dmu_tx_t *tx); 120 int dsl_dir_tempreserve_space(dsl_dir_t *dd, uint64_t mem, 121 uint64_t asize, uint64_t fsize, uint64_t usize, void **tr_cookiep, 122 dmu_tx_t *tx); 123 void dsl_dir_tempreserve_clear(void *tr_cookie, dmu_tx_t *tx); 124 void dsl_dir_willuse_space(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx); 125 void dsl_dir_diduse_space(dsl_dir_t *dd, dd_used_t type, 126 int64_t used, int64_t compressed, int64_t uncompressed, dmu_tx_t *tx); 127 void dsl_dir_transfer_space(dsl_dir_t *dd, int64_t delta, 128 dd_used_t oldtype, dd_used_t newtype, dmu_tx_t *tx); 129 int dsl_dir_set_quota(const char *ddname, uint64_t quota); 130 int dsl_dir_set_reservation(const char *ddname, uint64_t reservation); 131 int dsl_dir_rename(dsl_dir_t *dd, const char *newname); 132 int dsl_dir_transfer_possible(dsl_dir_t *sdd, dsl_dir_t *tdd, uint64_t space); 133 int dsl_dir_set_reservation_check(void *arg1, void *arg2, dmu_tx_t *tx); 134 boolean_t dsl_dir_is_clone(dsl_dir_t *dd); 135 void dsl_dir_new_refreservation(dsl_dir_t *dd, struct dsl_dataset *ds, 136 uint64_t reservation, cred_t *cr, dmu_tx_t *tx); 137 138 /* internal reserved dir name */ 139 #define MOS_DIR_NAME "$MOS" 140 #define ORIGIN_DIR_NAME "$ORIGIN" 141 142 #ifdef ZFS_DEBUG 143 #define dprintf_dd(dd, fmt, ...) do { \ 144 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ 145 char *__ds_name = kmem_alloc(MAXNAMELEN + strlen(MOS_DIR_NAME) + 1, \ 146 KM_SLEEP); \ 147 dsl_dir_name(dd, __ds_name); \ 148 dprintf("dd=%s " fmt, __ds_name, __VA_ARGS__); \ 149 kmem_free(__ds_name, MAXNAMELEN + strlen(MOS_DIR_NAME) + 1); \ 150 } \ 151 _NOTE(CONSTCOND) } while (0) 152 #else 153 #define dprintf_dd(dd, fmt, ...) 154 #endif 155 156 #ifdef __cplusplus 157 } 158 #endif 159 160 #endif /* _SYS_DSL_DIR_H */ 161