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 * Copyright (c) 2013 by Delphix. All rights reserved. 24 * Copyright (c) 2014, Joyent, Inc. All rights reserved. 25 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 26 */ 27 28 #ifndef _SYS_DSL_DIR_H 29 #define _SYS_DSL_DIR_H 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 /* 44 * DD_FIELD_* are strings that are used in the "extensified" dsl_dir zap object. 45 * They should be of the format <reverse-dns>:<field>. 46 */ 47 48 #define DD_FIELD_FILESYSTEM_COUNT "com.joyent:filesystem_count" 49 #define DD_FIELD_SNAPSHOT_COUNT "com.joyent:snapshot_count" 50 51 typedef enum dd_used { 52 DD_USED_HEAD, 53 DD_USED_SNAP, 54 DD_USED_CHILD, 55 DD_USED_CHILD_RSRV, 56 DD_USED_REFRSRV, 57 DD_USED_NUM 58 } dd_used_t; 59 60 #define DD_FLAG_USED_BREAKDOWN (1<<0) 61 62 typedef struct dsl_dir_phys { 63 uint64_t dd_creation_time; /* not actually used */ 64 uint64_t dd_head_dataset_obj; 65 uint64_t dd_parent_obj; 66 uint64_t dd_origin_obj; 67 uint64_t dd_child_dir_zapobj; 68 /* 69 * how much space our children are accounting for; for leaf 70 * datasets, == physical space used by fs + snaps 71 */ 72 uint64_t dd_used_bytes; 73 uint64_t dd_compressed_bytes; 74 uint64_t dd_uncompressed_bytes; 75 /* Administrative quota setting */ 76 uint64_t dd_quota; 77 /* Administrative reservation setting */ 78 uint64_t dd_reserved; 79 uint64_t dd_props_zapobj; 80 uint64_t dd_deleg_zapobj; /* dataset delegation permissions */ 81 uint64_t dd_flags; 82 uint64_t dd_used_breakdown[DD_USED_NUM]; 83 uint64_t dd_clones; /* dsl_dir objects */ 84 uint64_t dd_pad[13]; /* pad out to 256 bytes for good measure */ 85 } dsl_dir_phys_t; 86 87 struct dsl_dir { 88 dmu_buf_user_t dd_dbu; 89 90 /* These are immutable; no lock needed: */ 91 uint64_t dd_object; 92 dsl_pool_t *dd_pool; 93 94 /* Stable until user eviction; no lock needed: */ 95 dmu_buf_t *dd_dbuf; 96 97 /* protected by lock on pool's dp_dirty_dirs list */ 98 txg_node_t dd_dirty_link; 99 100 /* protected by dp_config_rwlock */ 101 dsl_dir_t *dd_parent; 102 103 /* Protected by dd_lock */ 104 kmutex_t dd_lock; 105 list_t dd_props; /* list of dsl_prop_record_t's */ 106 timestruc_t dd_snap_cmtime; /* last time snapshot namespace changed */ 107 uint64_t dd_origin_txg; 108 109 /* gross estimate of space used by in-flight tx's */ 110 uint64_t dd_tempreserved[TXG_SIZE]; 111 /* amount of space we expect to write; == amount of dirty data */ 112 int64_t dd_space_towrite[TXG_SIZE]; 113 114 /* protected by dd_lock; keep at end of struct for better locality */ 115 char dd_myname[ZFS_MAX_DATASET_NAME_LEN]; 116 }; 117 118 inline dsl_dir_phys_t * 119 dsl_dir_phys(dsl_dir_t *dd) 120 { 121 return (dd->dd_dbuf->db_data); 122 } 123 124 void dsl_dir_rele(dsl_dir_t *dd, void *tag); 125 void dsl_dir_async_rele(dsl_dir_t *dd, void *tag); 126 int dsl_dir_hold(dsl_pool_t *dp, const char *name, void *tag, 127 dsl_dir_t **, const char **tail); 128 int dsl_dir_hold_obj(dsl_pool_t *dp, uint64_t ddobj, 129 const char *tail, void *tag, dsl_dir_t **); 130 void dsl_dir_name(dsl_dir_t *dd, char *buf); 131 int dsl_dir_namelen(dsl_dir_t *dd); 132 uint64_t dsl_dir_create_sync(dsl_pool_t *dp, dsl_dir_t *pds, 133 const char *name, dmu_tx_t *tx); 134 void dsl_dir_stats(dsl_dir_t *dd, nvlist_t *nv); 135 uint64_t dsl_dir_space_available(dsl_dir_t *dd, 136 dsl_dir_t *ancestor, int64_t delta, int ondiskonly); 137 void dsl_dir_dirty(dsl_dir_t *dd, dmu_tx_t *tx); 138 void dsl_dir_sync(dsl_dir_t *dd, dmu_tx_t *tx); 139 int dsl_dir_tempreserve_space(dsl_dir_t *dd, uint64_t mem, 140 uint64_t asize, uint64_t fsize, uint64_t usize, void **tr_cookiep, 141 dmu_tx_t *tx); 142 void dsl_dir_tempreserve_clear(void *tr_cookie, dmu_tx_t *tx); 143 void dsl_dir_willuse_space(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx); 144 void dsl_dir_diduse_space(dsl_dir_t *dd, dd_used_t type, 145 int64_t used, int64_t compressed, int64_t uncompressed, dmu_tx_t *tx); 146 void dsl_dir_transfer_space(dsl_dir_t *dd, int64_t delta, 147 dd_used_t oldtype, dd_used_t newtype, dmu_tx_t *tx); 148 int dsl_dir_set_quota(const char *ddname, zprop_source_t source, 149 uint64_t quota); 150 int dsl_dir_set_reservation(const char *ddname, zprop_source_t source, 151 uint64_t reservation); 152 int dsl_dir_activate_fs_ss_limit(const char *); 153 int dsl_fs_ss_limit_check(dsl_dir_t *, uint64_t, zfs_prop_t, dsl_dir_t *, 154 cred_t *); 155 void dsl_fs_ss_count_adjust(dsl_dir_t *, int64_t, const char *, dmu_tx_t *); 156 int dsl_dir_rename(const char *oldname, const char *newname); 157 int dsl_dir_transfer_possible(dsl_dir_t *sdd, dsl_dir_t *tdd, 158 uint64_t fs_cnt, uint64_t ss_cnt, uint64_t space, cred_t *); 159 boolean_t dsl_dir_is_clone(dsl_dir_t *dd); 160 void dsl_dir_new_refreservation(dsl_dir_t *dd, struct dsl_dataset *ds, 161 uint64_t reservation, cred_t *cr, dmu_tx_t *tx); 162 void dsl_dir_snap_cmtime_update(dsl_dir_t *dd); 163 timestruc_t dsl_dir_snap_cmtime(dsl_dir_t *dd); 164 void dsl_dir_set_reservation_sync_impl(dsl_dir_t *dd, uint64_t value, 165 dmu_tx_t *tx); 166 void dsl_dir_zapify(dsl_dir_t *dd, dmu_tx_t *tx); 167 boolean_t dsl_dir_is_zapified(dsl_dir_t *dd); 168 169 /* internal reserved dir name */ 170 #define MOS_DIR_NAME "$MOS" 171 #define ORIGIN_DIR_NAME "$ORIGIN" 172 #define XLATION_DIR_NAME "$XLATION" 173 #define FREE_DIR_NAME "$FREE" 174 #define LEAK_DIR_NAME "$LEAK" 175 176 #ifdef ZFS_DEBUG 177 #define dprintf_dd(dd, fmt, ...) do { \ 178 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ 179 char *__ds_name = kmem_alloc(ZFS_MAX_DATASET_NAME_LEN, KM_SLEEP); \ 180 dsl_dir_name(dd, __ds_name); \ 181 dprintf("dd=%s " fmt, __ds_name, __VA_ARGS__); \ 182 kmem_free(__ds_name, ZFS_MAX_DATASET_NAME_LEN); \ 183 } \ 184 _NOTE(CONSTCOND) } while (0) 185 #else 186 #define dprintf_dd(dd, fmt, ...) 187 #endif 188 189 #ifdef __cplusplus 190 } 191 #endif 192 193 #endif /* _SYS_DSL_DIR_H */ 194