dsl_dir.h revision 277585
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 37extern "C" { 38#endif 39 40struct 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 50typedef 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 61typedef 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 86struct dsl_dir { 87 /* These are immutable; no lock needed: */ 88 uint64_t dd_object; 89 dsl_pool_t *dd_pool; 90 91 /* Stable until user eviction; no lock needed: */ 92 dmu_buf_t *dd_dbuf; 93 94 /* protected by lock on pool's dp_dirty_dirs list */ 95 txg_node_t dd_dirty_link; 96 97 /* protected by dp_config_rwlock */ 98 dsl_dir_t *dd_parent; 99 100 /* Protected by dd_lock */ 101 kmutex_t dd_lock; 102 list_t dd_prop_cbs; /* list of dsl_prop_cb_record_t's */ 103 timestruc_t dd_snap_cmtime; /* last time snapshot namespace changed */ 104 uint64_t dd_origin_txg; 105 106 /* gross estimate of space used by in-flight tx's */ 107 uint64_t dd_tempreserved[TXG_SIZE]; 108 /* amount of space we expect to write; == amount of dirty data */ 109 int64_t dd_space_towrite[TXG_SIZE]; 110 111 /* protected by dd_lock; keep at end of struct for better locality */ 112 char dd_myname[MAXNAMELEN]; 113}; 114 115inline dsl_dir_phys_t * 116dsl_dir_phys(dsl_dir_t *dd) 117{ 118 return (dd->dd_dbuf->db_data); 119} 120 121void dsl_dir_rele(dsl_dir_t *dd, void *tag); 122int dsl_dir_hold(dsl_pool_t *dp, const char *name, void *tag, 123 dsl_dir_t **, const char **tail); 124int dsl_dir_hold_obj(dsl_pool_t *dp, uint64_t ddobj, 125 const char *tail, void *tag, dsl_dir_t **); 126void dsl_dir_name(dsl_dir_t *dd, char *buf); 127int dsl_dir_namelen(dsl_dir_t *dd); 128uint64_t dsl_dir_create_sync(dsl_pool_t *dp, dsl_dir_t *pds, 129 const char *name, dmu_tx_t *tx); 130void dsl_dir_stats(dsl_dir_t *dd, nvlist_t *nv); 131uint64_t dsl_dir_space_available(dsl_dir_t *dd, 132 dsl_dir_t *ancestor, int64_t delta, int ondiskonly); 133void dsl_dir_dirty(dsl_dir_t *dd, dmu_tx_t *tx); 134void dsl_dir_sync(dsl_dir_t *dd, dmu_tx_t *tx); 135int dsl_dir_tempreserve_space(dsl_dir_t *dd, uint64_t mem, 136 uint64_t asize, uint64_t fsize, uint64_t usize, void **tr_cookiep, 137 dmu_tx_t *tx); 138void dsl_dir_tempreserve_clear(void *tr_cookie, dmu_tx_t *tx); 139void dsl_dir_willuse_space(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx); 140void dsl_dir_diduse_space(dsl_dir_t *dd, dd_used_t type, 141 int64_t used, int64_t compressed, int64_t uncompressed, dmu_tx_t *tx); 142void dsl_dir_transfer_space(dsl_dir_t *dd, int64_t delta, 143 dd_used_t oldtype, dd_used_t newtype, dmu_tx_t *tx); 144int dsl_dir_set_quota(const char *ddname, zprop_source_t source, 145 uint64_t quota); 146int dsl_dir_set_reservation(const char *ddname, zprop_source_t source, 147 uint64_t reservation); 148int dsl_dir_activate_fs_ss_limit(const char *); 149int dsl_fs_ss_limit_check(dsl_dir_t *, uint64_t, zfs_prop_t, dsl_dir_t *, 150 cred_t *); 151void dsl_fs_ss_count_adjust(dsl_dir_t *, int64_t, const char *, dmu_tx_t *); 152int dsl_dir_rename(const char *oldname, const char *newname); 153int dsl_dir_transfer_possible(dsl_dir_t *sdd, dsl_dir_t *tdd, 154 uint64_t fs_cnt, uint64_t ss_cnt, uint64_t space, cred_t *); 155boolean_t dsl_dir_is_clone(dsl_dir_t *dd); 156void dsl_dir_new_refreservation(dsl_dir_t *dd, struct dsl_dataset *ds, 157 uint64_t reservation, cred_t *cr, dmu_tx_t *tx); 158void dsl_dir_snap_cmtime_update(dsl_dir_t *dd); 159timestruc_t dsl_dir_snap_cmtime(dsl_dir_t *dd); 160void dsl_dir_set_reservation_sync_impl(dsl_dir_t *dd, uint64_t value, 161 dmu_tx_t *tx); 162void dsl_dir_zapify(dsl_dir_t *dd, dmu_tx_t *tx); 163boolean_t dsl_dir_is_zapified(dsl_dir_t *dd); 164 165/* internal reserved dir name */ 166#define MOS_DIR_NAME "$MOS" 167#define ORIGIN_DIR_NAME "$ORIGIN" 168#define XLATION_DIR_NAME "$XLATION" 169#define FREE_DIR_NAME "$FREE" 170#define LEAK_DIR_NAME "$LEAK" 171 172#ifdef ZFS_DEBUG 173#define dprintf_dd(dd, fmt, ...) do { \ 174 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ 175 char *__ds_name = kmem_alloc(MAXNAMELEN + strlen(MOS_DIR_NAME) + 1, \ 176 KM_SLEEP); \ 177 dsl_dir_name(dd, __ds_name); \ 178 dprintf("dd=%s " fmt, __ds_name, __VA_ARGS__); \ 179 kmem_free(__ds_name, MAXNAMELEN + strlen(MOS_DIR_NAME) + 1); \ 180 } \ 181_NOTE(CONSTCOND) } while (0) 182#else 183#define dprintf_dd(dd, fmt, ...) 184#endif 185 186#ifdef __cplusplus 187} 188#endif 189 190#endif /* _SYS_DSL_DIR_H */ 191