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) 2012, 2016 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 #define DD_FIELD_LAST_REMAP_TXG "com.delphix:last_remap_txg" 51 52 typedef enum dd_used { 53 DD_USED_HEAD, 54 DD_USED_SNAP, 55 DD_USED_CHILD, 56 DD_USED_CHILD_RSRV, 57 DD_USED_REFRSRV, 58 DD_USED_NUM 59 } dd_used_t; 60 61 #define DD_FLAG_USED_BREAKDOWN (1<<0) 62 63 typedef struct dsl_dir_phys { 64 uint64_t dd_creation_time; /* not actually used */ 65 uint64_t dd_head_dataset_obj; 66 uint64_t dd_parent_obj; 67 uint64_t dd_origin_obj; 68 uint64_t dd_child_dir_zapobj; 69 /* 70 * how much space our children are accounting for; for leaf 71 * datasets, == physical space used by fs + snaps 72 */ 73 uint64_t dd_used_bytes; 74 uint64_t dd_compressed_bytes; 75 uint64_t dd_uncompressed_bytes; 76 /* Administrative quota setting */ 77 uint64_t dd_quota; 78 /* Administrative reservation setting */ 79 uint64_t dd_reserved; 80 uint64_t dd_props_zapobj; 81 uint64_t dd_deleg_zapobj; /* dataset delegation permissions */ 82 uint64_t dd_flags; 83 uint64_t dd_used_breakdown[DD_USED_NUM]; 84 uint64_t dd_clones; /* dsl_dir objects */ 85 uint64_t dd_pad[13]; /* pad out to 256 bytes for good measure */ 86 } dsl_dir_phys_t; 87 88 struct dsl_dir { 89 dmu_buf_user_t dd_dbu; 90 91 /* These are immutable; no lock needed: */ 92 uint64_t dd_object; 93 dsl_pool_t *dd_pool; 94 95 /* Stable until user eviction; no lock needed: */ 96 dmu_buf_t *dd_dbuf; 97 98 /* protected by lock on pool's dp_dirty_dirs list */ 99 txg_node_t dd_dirty_link; 100 101 /* protected by dp_config_rwlock */ 102 dsl_dir_t *dd_parent; 103 104 /* Protected by dd_lock */ 105 kmutex_t dd_lock; 106 list_t dd_props; /* list of dsl_prop_record_t's */ 107 timestruc_t dd_snap_cmtime; /* last time snapshot namespace changed */ 108 uint64_t dd_origin_txg; 109 110 /* gross estimate of space used by in-flight tx's */ 111 uint64_t dd_tempreserved[TXG_SIZE]; 112 /* amount of space we expect to write; == amount of dirty data */ 113 int64_t dd_space_towrite[TXG_SIZE]; 114 115 /* protected by dd_lock; keep at end of struct for better locality */ 116 char dd_myname[ZFS_MAX_DATASET_NAME_LEN]; 117 }; 118 119 inline dsl_dir_phys_t * 120 dsl_dir_phys(dsl_dir_t *dd) 121 { 122 return (dd->dd_dbuf->db_data); 123 } 124 125 void dsl_dir_rele(dsl_dir_t *dd, void *tag); 126 void dsl_dir_async_rele(dsl_dir_t *dd, void *tag); 127 int dsl_dir_hold(dsl_pool_t *dp, const char *name, void *tag, 128 dsl_dir_t **, const char **tail); 129 int dsl_dir_hold_obj(dsl_pool_t *dp, uint64_t ddobj, 130 const char *tail, void *tag, dsl_dir_t **); 131 void dsl_dir_name(dsl_dir_t *dd, char *buf); 132 int dsl_dir_namelen(dsl_dir_t *dd); 133 uint64_t dsl_dir_create_sync(dsl_pool_t *dp, dsl_dir_t *pds, 134 const char *name, dmu_tx_t *tx); 135 136 uint64_t dsl_dir_get_used(dsl_dir_t *dd); 137 uint64_t dsl_dir_get_quota(dsl_dir_t *dd); 138 uint64_t dsl_dir_get_reservation(dsl_dir_t *dd); 139 uint64_t dsl_dir_get_compressratio(dsl_dir_t *dd); 140 uint64_t dsl_dir_get_logicalused(dsl_dir_t *dd); 141 uint64_t dsl_dir_get_usedsnap(dsl_dir_t *dd); 142 uint64_t dsl_dir_get_usedds(dsl_dir_t *dd); 143 uint64_t dsl_dir_get_usedrefreserv(dsl_dir_t *dd); 144 uint64_t dsl_dir_get_usedchild(dsl_dir_t *dd); 145 void dsl_dir_get_origin(dsl_dir_t *dd, char *buf); 146 int dsl_dir_get_filesystem_count(dsl_dir_t *dd, uint64_t *count); 147 int dsl_dir_get_snapshot_count(dsl_dir_t *dd, uint64_t *count); 148 int dsl_dir_get_remaptxg(dsl_dir_t *dd, uint64_t *count); 149 150 void dsl_dir_stats(dsl_dir_t *dd, nvlist_t *nv); 151 uint64_t dsl_dir_space_available(dsl_dir_t *dd, 152 dsl_dir_t *ancestor, int64_t delta, int ondiskonly); 153 void dsl_dir_dirty(dsl_dir_t *dd, dmu_tx_t *tx); 154 void dsl_dir_sync(dsl_dir_t *dd, dmu_tx_t *tx); 155 int dsl_dir_tempreserve_space(dsl_dir_t *dd, uint64_t mem, 156 uint64_t asize, boolean_t netfree, void **tr_cookiep, dmu_tx_t *tx); 157 void dsl_dir_tempreserve_clear(void *tr_cookie, dmu_tx_t *tx); 158 void dsl_dir_willuse_space(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx); 159 void dsl_dir_diduse_space(dsl_dir_t *dd, dd_used_t type, 160 int64_t used, int64_t compressed, int64_t uncompressed, dmu_tx_t *tx); 161 void dsl_dir_transfer_space(dsl_dir_t *dd, int64_t delta, 162 dd_used_t oldtype, dd_used_t newtype, dmu_tx_t *tx); 163 int dsl_dir_set_quota(const char *ddname, zprop_source_t source, 164 uint64_t quota); 165 int dsl_dir_set_reservation(const char *ddname, zprop_source_t source, 166 uint64_t reservation); 167 int dsl_dir_activate_fs_ss_limit(const char *); 168 int dsl_fs_ss_limit_check(dsl_dir_t *, uint64_t, zfs_prop_t, dsl_dir_t *, 169 cred_t *); 170 void dsl_fs_ss_count_adjust(dsl_dir_t *, int64_t, const char *, dmu_tx_t *); 171 int dsl_dir_update_last_remap_txg(dsl_dir_t *, uint64_t); 172 int dsl_dir_rename(const char *oldname, const char *newname); 173 int dsl_dir_transfer_possible(dsl_dir_t *sdd, dsl_dir_t *tdd, 174 uint64_t fs_cnt, uint64_t ss_cnt, uint64_t space, cred_t *); 175 boolean_t dsl_dir_is_clone(dsl_dir_t *dd); 176 void dsl_dir_new_refreservation(dsl_dir_t *dd, struct dsl_dataset *ds, 177 uint64_t reservation, cred_t *cr, dmu_tx_t *tx); 178 void dsl_dir_snap_cmtime_update(dsl_dir_t *dd); 179 timestruc_t dsl_dir_snap_cmtime(dsl_dir_t *dd); 180 void dsl_dir_set_reservation_sync_impl(dsl_dir_t *dd, uint64_t value, 181 dmu_tx_t *tx); 182 void dsl_dir_zapify(dsl_dir_t *dd, dmu_tx_t *tx); 183 boolean_t dsl_dir_is_zapified(dsl_dir_t *dd); 184 185 /* internal reserved dir name */ 186 #define MOS_DIR_NAME "$MOS" 187 #define ORIGIN_DIR_NAME "$ORIGIN" 188 #define FREE_DIR_NAME "$FREE" 189 #define LEAK_DIR_NAME "$LEAK" 190 191 #ifdef ZFS_DEBUG 192 #define dprintf_dd(dd, fmt, ...) do { \ 193 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ 194 char *__ds_name = kmem_alloc(ZFS_MAX_DATASET_NAME_LEN, KM_SLEEP); \ 195 dsl_dir_name(dd, __ds_name); \ 196 dprintf("dd=%s " fmt, __ds_name, __VA_ARGS__); \ 197 kmem_free(__ds_name, ZFS_MAX_DATASET_NAME_LEN); \ 198 } \ 199 _NOTE(CONSTCOND) } while (0) 200 #else 201 #define dprintf_dd(dd, fmt, ...) 202 #endif 203 204 #ifdef __cplusplus 205 } 206 #endif 207 208 #endif /* _SYS_DSL_DIR_H */ 209