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 */ 26 27 #ifndef _SYS_DSL_DIR_H 28 #define _SYS_DSL_DIR_H 29 30 #include <sys/dmu.h> 31 #include <sys/dsl_pool.h> 32 #include <sys/dsl_synctask.h> 33 #include <sys/refcount.h> 34 #include <sys/zfs_context.h> 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 struct dsl_dataset; 41 42 /* 43 * DD_FIELD_* are strings that are used in the "extensified" dsl_dir zap object. 44 * They should be of the format <reverse-dns>:<field>. 45 */ 46 47 #define DD_FIELD_FILESYSTEM_COUNT "com.joyent:filesystem_count" 48 #define DD_FIELD_SNAPSHOT_COUNT "com.joyent:snapshot_count" 49 50 typedef enum dd_used { 51 DD_USED_HEAD, 52 DD_USED_SNAP, 53 DD_USED_CHILD, 54 DD_USED_CHILD_RSRV, 55 DD_USED_REFRSRV, 56 DD_USED_NUM 57 } dd_used_t; 58 59 #define DD_FLAG_USED_BREAKDOWN (1<<0) 60 61 typedef struct dsl_dir_phys { 62 uint64_t dd_creation_time; /* not actually used */ 63 uint64_t dd_head_dataset_obj; 64 uint64_t dd_parent_obj; 65 uint64_t dd_origin_obj; 66 uint64_t dd_child_dir_zapobj; 67 /* 68 * how much space our children are accounting for; for leaf 69 * datasets, == physical space used by fs + snaps 70 */ 71 uint64_t dd_used_bytes; 72 uint64_t dd_compressed_bytes; 73 uint64_t dd_uncompressed_bytes; 74 /* Administrative quota setting */ 75 uint64_t dd_quota; 76 /* Administrative reservation setting */ 77 uint64_t dd_reserved; 78 uint64_t dd_props_zapobj; 79 uint64_t dd_deleg_zapobj; /* dataset delegation permissions */ 80 uint64_t dd_flags; 81 uint64_t dd_used_breakdown[DD_USED_NUM]; 82 uint64_t dd_clones; /* dsl_dir objects */ 83 uint64_t dd_pad[13]; /* pad out to 256 bytes for good measure */ 84 } dsl_dir_phys_t; 85 86 struct dsl_dir { 87 /* These are immutable; no lock needed: */ 88 uint64_t dd_object; 89 dsl_dir_phys_t *dd_phys; 90 dmu_buf_t *dd_dbuf; 91 dsl_pool_t *dd_pool; 92 93 /* protected by lock on pool's dp_dirty_dirs list */ 94 txg_node_t dd_dirty_link; 95 96 /* protected by dp_config_rwlock */ 97 dsl_dir_t *dd_parent; 98 99 /* Protected by dd_lock */ 100 kmutex_t dd_lock; 101 list_t dd_prop_cbs; /* list of dsl_prop_cb_record_t's */ 102 timestruc_t dd_snap_cmtime; /* last time snapshot namespace changed */ 103 uint64_t dd_origin_txg; 104 105 /* gross estimate of space used by in-flight tx's */ 106 uint64_t dd_tempreserved[TXG_SIZE]; 107 /* amount of space we expect to write; == amount of dirty data */ 108 int64_t dd_space_towrite[TXG_SIZE]; 109 110 /* protected by dd_lock; keep at end of struct for better locality */ 111 char dd_myname[MAXNAMELEN]; 112 }; 113 114 void dsl_dir_rele(dsl_dir_t *dd, void *tag); 115 int dsl_dir_hold(dsl_pool_t *dp, const char *name, void *tag, 116 dsl_dir_t **, const char **tail); 117 int dsl_dir_hold_obj(dsl_pool_t *dp, uint64_t ddobj, 118 const char *tail, void *tag, dsl_dir_t **); 119 void dsl_dir_name(dsl_dir_t *dd, char *buf); 120 int dsl_dir_namelen(dsl_dir_t *dd); 121 uint64_t dsl_dir_create_sync(dsl_pool_t *dp, dsl_dir_t *pds, 122 const char *name, dmu_tx_t *tx); 123 void dsl_dir_stats(dsl_dir_t *dd, nvlist_t *nv); 124 uint64_t dsl_dir_space_available(dsl_dir_t *dd, 125 dsl_dir_t *ancestor, int64_t delta, int ondiskonly); 126 void dsl_dir_dirty(dsl_dir_t *dd, dmu_tx_t *tx); 127 void dsl_dir_sync(dsl_dir_t *dd, dmu_tx_t *tx); 128 int dsl_dir_tempreserve_space(dsl_dir_t *dd, uint64_t mem, 129 uint64_t asize, uint64_t fsize, uint64_t usize, void **tr_cookiep, 130 dmu_tx_t *tx); 131 void dsl_dir_tempreserve_clear(void *tr_cookie, dmu_tx_t *tx); 132 void dsl_dir_willuse_space(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx); 133 void dsl_dir_diduse_space(dsl_dir_t *dd, dd_used_t type, 134 int64_t used, int64_t compressed, int64_t uncompressed, dmu_tx_t *tx); 135 void dsl_dir_transfer_space(dsl_dir_t *dd, int64_t delta, 136 dd_used_t oldtype, dd_used_t newtype, dmu_tx_t *tx); 137 int dsl_dir_set_quota(const char *ddname, zprop_source_t source, 138 uint64_t quota); 139 int dsl_dir_set_reservation(const char *ddname, zprop_source_t source, 140 uint64_t reservation); 141 int dsl_dir_activate_fs_ss_limit(const char *); 142 int dsl_fs_ss_limit_check(dsl_dir_t *, uint64_t, zfs_prop_t, dsl_dir_t *, 143 cred_t *); 144 void dsl_fs_ss_count_adjust(dsl_dir_t *, int64_t, const char *, dmu_tx_t *); 145 int dsl_dir_rename(const char *oldname, const char *newname); 146 int dsl_dir_transfer_possible(dsl_dir_t *sdd, dsl_dir_t *tdd, 147 uint64_t fs_cnt, uint64_t ss_cnt, uint64_t space, cred_t *); 148 boolean_t dsl_dir_is_clone(dsl_dir_t *dd); 149 void dsl_dir_new_refreservation(dsl_dir_t *dd, struct dsl_dataset *ds, 150 uint64_t reservation, cred_t *cr, dmu_tx_t *tx); 151 void dsl_dir_snap_cmtime_update(dsl_dir_t *dd); 152 timestruc_t dsl_dir_snap_cmtime(dsl_dir_t *dd); 153 void dsl_dir_set_reservation_sync_impl(dsl_dir_t *dd, uint64_t value, 154 dmu_tx_t *tx); 155 void dsl_dir_zapify(dsl_dir_t *dd, dmu_tx_t *tx); 156 boolean_t dsl_dir_is_zapified(dsl_dir_t *dd); 157 158 /* internal reserved dir name */ 159 #define MOS_DIR_NAME "$MOS" 160 #define ORIGIN_DIR_NAME "$ORIGIN" 161 #define XLATION_DIR_NAME "$XLATION" 162 #define FREE_DIR_NAME "$FREE" 163 #define LEAK_DIR_NAME "$LEAK" 164 165 #ifdef ZFS_DEBUG 166 #define dprintf_dd(dd, fmt, ...) do { \ 167 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ 168 char *__ds_name = kmem_alloc(MAXNAMELEN + strlen(MOS_DIR_NAME) + 1, \ 169 KM_SLEEP); \ 170 dsl_dir_name(dd, __ds_name); \ 171 dprintf("dd=%s " fmt, __ds_name, __VA_ARGS__); \ 172 kmem_free(__ds_name, MAXNAMELEN + strlen(MOS_DIR_NAME) + 1); \ 173 } \ 174 _NOTE(CONSTCOND) } while (0) 175 #else 176 #define dprintf_dd(dd, fmt, ...) 177 #endif 178 179 #ifdef __cplusplus 180 } 181 #endif 182 183 #endif /* _SYS_DSL_DIR_H */ 184