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 */ 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_clones; /* dsl_dir objects */ 74 uint64_t dd_pad[13]; /* pad out to 256 bytes for good measure */ 75 } dsl_dir_phys_t; 76 77 struct dsl_dir { 78 /* These are immutable; no lock needed: */ 79 uint64_t dd_object; 80 dsl_dir_phys_t *dd_phys; 81 dmu_buf_t *dd_dbuf; 82 dsl_pool_t *dd_pool; 83 84 /* protected by lock on pool's dp_dirty_dirs list */ 85 txg_node_t dd_dirty_link; 86 87 /* protected by dp_config_rwlock */ 88 dsl_dir_t *dd_parent; 89 90 /* Protected by dd_lock */ 91 kmutex_t dd_lock; 92 list_t dd_prop_cbs; /* list of dsl_prop_cb_record_t's */ 93 timestruc_t dd_snap_cmtime; /* last time snapshot namespace changed */ 94 uint64_t dd_origin_txg; 95 96 /* gross estimate of space used by in-flight tx's */ 97 uint64_t dd_tempreserved[TXG_SIZE]; 98 /* amount of space we expect to write; == amount of dirty data */ 99 int64_t dd_space_towrite[TXG_SIZE]; 100 101 /* protected by dd_lock; keep at end of struct for better locality */ 102 char dd_myname[MAXNAMELEN]; 103 }; 104 105 void dsl_dir_rele(dsl_dir_t *dd, void *tag); 106 int dsl_dir_hold(dsl_pool_t *dp, const char *name, void *tag, 107 dsl_dir_t **, const char **tail); 108 int dsl_dir_hold_obj(dsl_pool_t *dp, uint64_t ddobj, 109 const char *tail, void *tag, dsl_dir_t **); 110 void dsl_dir_name(dsl_dir_t *dd, char *buf); 111 int dsl_dir_namelen(dsl_dir_t *dd); 112 uint64_t dsl_dir_create_sync(dsl_pool_t *dp, dsl_dir_t *pds, 113 const char *name, dmu_tx_t *tx); 114 void dsl_dir_stats(dsl_dir_t *dd, nvlist_t *nv); 115 uint64_t dsl_dir_space_available(dsl_dir_t *dd, 116 dsl_dir_t *ancestor, int64_t delta, int ondiskonly); 117 void dsl_dir_dirty(dsl_dir_t *dd, dmu_tx_t *tx); 118 void dsl_dir_sync(dsl_dir_t *dd, dmu_tx_t *tx); 119 int dsl_dir_tempreserve_space(dsl_dir_t *dd, uint64_t mem, 120 uint64_t asize, uint64_t fsize, uint64_t usize, void **tr_cookiep, 121 dmu_tx_t *tx); 122 void dsl_dir_tempreserve_clear(void *tr_cookie, dmu_tx_t *tx); 123 void dsl_dir_willuse_space(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx); 124 void dsl_dir_diduse_space(dsl_dir_t *dd, dd_used_t type, 125 int64_t used, int64_t compressed, int64_t uncompressed, dmu_tx_t *tx); 126 void dsl_dir_transfer_space(dsl_dir_t *dd, int64_t delta, 127 dd_used_t oldtype, dd_used_t newtype, dmu_tx_t *tx); 128 int dsl_dir_set_quota(const char *ddname, zprop_source_t source, 129 uint64_t quota); 130 int dsl_dir_set_reservation(const char *ddname, zprop_source_t source, 131 uint64_t reservation); 132 int dsl_dir_rename(const char *oldname, const char *newname); 133 int dsl_dir_transfer_possible(dsl_dir_t *sdd, dsl_dir_t *tdd, uint64_t space); 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 void dsl_dir_snap_cmtime_update(dsl_dir_t *dd); 138 timestruc_t dsl_dir_snap_cmtime(dsl_dir_t *dd); 139 void dsl_dir_set_reservation_sync_impl(dsl_dir_t *dd, uint64_t value, 140 dmu_tx_t *tx); 141 142 /* internal reserved dir name */ 143 #define MOS_DIR_NAME "$MOS" 144 #define ORIGIN_DIR_NAME "$ORIGIN" 145 #define XLATION_DIR_NAME "$XLATION" 146 #define FREE_DIR_NAME "$FREE" 147 148 #ifdef ZFS_DEBUG 149 #define dprintf_dd(dd, fmt, ...) do { \ 150 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ 151 char *__ds_name = kmem_alloc(MAXNAMELEN + strlen(MOS_DIR_NAME) + 1, \ 152 KM_SLEEP); \ 153 dsl_dir_name(dd, __ds_name); \ 154 dprintf("dd=%s " fmt, __ds_name, __VA_ARGS__); \ 155 kmem_free(__ds_name, MAXNAMELEN + strlen(MOS_DIR_NAME) + 1); \ 156 } \ 157 _NOTE(CONSTCOND) } while (0) 158 #else 159 #define dprintf_dd(dd, fmt, ...) 160 #endif 161 162 #ifdef __cplusplus 163 } 164 #endif 165 166 #endif /* _SYS_DSL_DIR_H */ 167