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 2007 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 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <sys/dmu.h> 32 #include <sys/dsl_pool.h> 33 #include <sys/dsl_synctask.h> 34 #include <sys/refcount.h> 35 #include <sys/zfs_context.h> 36 37 #ifdef __cplusplus 38 extern "C" { 39 #endif 40 41 struct dsl_dataset; 42 43 typedef struct dsl_dir_phys { 44 uint64_t dd_creation_time; /* not actually used */ 45 uint64_t dd_head_dataset_obj; 46 uint64_t dd_parent_obj; 47 uint64_t dd_origin_obj; 48 uint64_t dd_child_dir_zapobj; 49 /* 50 * how much space our children are accounting for; for leaf 51 * datasets, == physical space used by fs + snaps 52 */ 53 uint64_t dd_used_bytes; 54 uint64_t dd_compressed_bytes; 55 uint64_t dd_uncompressed_bytes; 56 /* Administrative quota setting */ 57 uint64_t dd_quota; 58 /* Administrative reservation setting */ 59 uint64_t dd_reserved; 60 uint64_t dd_props_zapobj; 61 uint64_t dd_deleg_zapobj; /* dataset delegation permissions */ 62 uint64_t dd_pad[20]; /* pad out to 256 bytes for good measure */ 63 } dsl_dir_phys_t; 64 65 struct dsl_dir { 66 /* These are immutable; no lock needed: */ 67 uint64_t dd_object; 68 dsl_dir_phys_t *dd_phys; 69 dmu_buf_t *dd_dbuf; 70 dsl_pool_t *dd_pool; 71 72 /* protected by lock on pool's dp_dirty_dirs list */ 73 txg_node_t dd_dirty_link; 74 75 /* protected by dp_config_rwlock */ 76 dsl_dir_t *dd_parent; 77 78 /* Protected by dd_lock */ 79 kmutex_t dd_lock; 80 list_t dd_prop_cbs; /* list of dsl_prop_cb_record_t's */ 81 82 /* Accounting */ 83 /* reflects any changes to dd_phys->dd_used_bytes made this syncing */ 84 int64_t dd_used_bytes; 85 /* gross estimate of space used by in-flight tx's */ 86 uint64_t dd_tempreserved[TXG_SIZE]; 87 /* amount of space we expect to write; == amount of dirty data */ 88 int64_t dd_space_towrite[TXG_SIZE]; 89 90 /* protected by dd_lock; keep at end of struct for better locality */ 91 char dd_myname[MAXNAMELEN]; 92 }; 93 94 void dsl_dir_close(dsl_dir_t *dd, void *tag); 95 int dsl_dir_open(const char *name, void *tag, dsl_dir_t **, const char **tail); 96 int dsl_dir_open_spa(spa_t *spa, const char *name, void *tag, dsl_dir_t **, 97 const char **tailp); 98 int dsl_dir_open_obj(dsl_pool_t *dp, uint64_t ddobj, 99 const char *tail, void *tag, dsl_dir_t **); 100 void dsl_dir_name(dsl_dir_t *dd, char *buf); 101 int dsl_dir_namelen(dsl_dir_t *dd); 102 int dsl_dir_is_private(dsl_dir_t *dd); 103 uint64_t dsl_dir_create_sync(dsl_dir_t *pds, const char *name, dmu_tx_t *tx); 104 void dsl_dir_create_root(objset_t *mos, uint64_t *ddobjp, dmu_tx_t *tx); 105 dsl_checkfunc_t dsl_dir_destroy_check; 106 dsl_syncfunc_t dsl_dir_destroy_sync; 107 void dsl_dir_stats(dsl_dir_t *dd, nvlist_t *nv); 108 uint64_t dsl_dir_space_available(dsl_dir_t *dd, 109 dsl_dir_t *ancestor, int64_t delta, int ondiskonly); 110 void dsl_dir_dirty(dsl_dir_t *dd, dmu_tx_t *tx); 111 void dsl_dir_sync(dsl_dir_t *dd, dmu_tx_t *tx); 112 int dsl_dir_tempreserve_space(dsl_dir_t *dd, uint64_t mem, 113 uint64_t asize, uint64_t fsize, uint64_t usize, void **tr_cookiep, 114 dmu_tx_t *tx); 115 void dsl_dir_tempreserve_clear(void *tr_cookie, dmu_tx_t *tx); 116 void dsl_dir_willuse_space(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx); 117 void dsl_dir_diduse_space(dsl_dir_t *dd, 118 int64_t used, int64_t compressed, int64_t uncompressed, dmu_tx_t *tx); 119 int dsl_dir_set_quota(const char *ddname, uint64_t quota); 120 int dsl_dir_set_reservation(const char *ddname, uint64_t reservation); 121 int dsl_dir_rename(dsl_dir_t *dd, const char *newname); 122 int dsl_dir_transfer_possible(dsl_dir_t *sdd, dsl_dir_t *tdd, uint64_t space); 123 int dsl_dir_set_reservation_check(void *arg1, void *arg2, dmu_tx_t *tx); 124 125 /* internal reserved dir name */ 126 #define MOS_DIR_NAME "$MOS" 127 128 #ifdef ZFS_DEBUG 129 #define dprintf_dd(dd, fmt, ...) do { \ 130 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ 131 char *__ds_name = kmem_alloc(MAXNAMELEN + strlen(MOS_DIR_NAME) + 1, \ 132 KM_SLEEP); \ 133 dsl_dir_name(dd, __ds_name); \ 134 dprintf("dd=%s " fmt, __ds_name, __VA_ARGS__); \ 135 kmem_free(__ds_name, MAXNAMELEN + strlen(MOS_DIR_NAME) + 1); \ 136 } \ 137 _NOTE(CONSTCOND) } while (0) 138 #else 139 #define dprintf_dd(dd, fmt, ...) 140 #endif 141 142 #ifdef __cplusplus 143 } 144 #endif 145 146 #endif /* _SYS_DSL_DIR_H */ 147