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 by Delphix. All rights reserved. 24 */ 25 26 /* Portions Copyright 2010 Robert Milkowski */ 27 28 #ifndef _SYS_DMU_OBJSET_H 29 #define _SYS_DMU_OBJSET_H 30 31 #include <sys/spa.h> 32 #include <sys/arc.h> 33 #include <sys/txg.h> 34 #include <sys/zfs_context.h> 35 #include <sys/dnode.h> 36 #include <sys/zio.h> 37 #include <sys/zil.h> 38 #include <sys/sa.h> 39 40 #ifdef __cplusplus 41 extern "C" { 42 #endif 43 44 extern krwlock_t os_lock; 45 46 struct dsl_pool; 47 struct dsl_dataset; 48 struct dmu_tx; 49 50 #define OBJSET_PHYS_SIZE 2048 51 #define OBJSET_OLD_PHYS_SIZE 1024 52 53 #define OBJSET_BUF_HAS_USERUSED(buf) \ 54 (arc_buf_size(buf) > OBJSET_OLD_PHYS_SIZE) 55 56 #define OBJSET_FLAG_USERACCOUNTING_COMPLETE (1ULL<<0) 57 58 typedef struct objset_phys { 59 dnode_phys_t os_meta_dnode; 60 zil_header_t os_zil_header; 61 uint64_t os_type; 62 uint64_t os_flags; 63 char os_pad[OBJSET_PHYS_SIZE - sizeof (dnode_phys_t)*3 - 64 sizeof (zil_header_t) - sizeof (uint64_t)*2]; 65 dnode_phys_t os_userused_dnode; 66 dnode_phys_t os_groupused_dnode; 67 } objset_phys_t; 68 69 struct objset { 70 /* Immutable: */ 71 struct dsl_dataset *os_dsl_dataset; 72 spa_t *os_spa; 73 arc_buf_t *os_phys_buf; 74 objset_phys_t *os_phys; 75 /* 76 * The following "special" dnodes have no parent and are exempt from 77 * dnode_move(), but they root their descendents in this objset using 78 * handles anyway, so that all access to dnodes from dbufs consistently 79 * uses handles. 80 */ 81 dnode_handle_t os_meta_dnode; 82 dnode_handle_t os_userused_dnode; 83 dnode_handle_t os_groupused_dnode; 84 zilog_t *os_zil; 85 86 /* can change, under dsl_dir's locks: */ 87 uint8_t os_checksum; 88 uint8_t os_compress; 89 uint8_t os_copies; 90 uint8_t os_dedup_checksum; 91 uint8_t os_dedup_verify; 92 uint8_t os_logbias; 93 uint8_t os_primary_cache; 94 uint8_t os_secondary_cache; 95 uint8_t os_sync; 96 97 /* no lock needed: */ 98 struct dmu_tx *os_synctx; /* XXX sketchy */ 99 blkptr_t *os_rootbp; 100 zil_header_t os_zil_header; 101 list_t os_synced_dnodes; 102 uint64_t os_flags; 103 104 /* Protected by os_obj_lock */ 105 kmutex_t os_obj_lock; 106 uint64_t os_obj_next; 107 108 /* Protected by os_lock */ 109 kmutex_t os_lock; 110 list_t os_dirty_dnodes[TXG_SIZE]; 111 list_t os_free_dnodes[TXG_SIZE]; 112 list_t os_dnodes; 113 list_t os_downgraded_dbufs; 114 115 /* stuff we store for the user */ 116 kmutex_t os_user_ptr_lock; 117 void *os_user_ptr; 118 sa_os_t *os_sa; 119 }; 120 121 #define DMU_META_OBJSET 0 122 #define DMU_META_DNODE_OBJECT 0 123 #define DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0) 124 #define DMU_META_DNODE(os) ((os)->os_meta_dnode.dnh_dnode) 125 #define DMU_USERUSED_DNODE(os) ((os)->os_userused_dnode.dnh_dnode) 126 #define DMU_GROUPUSED_DNODE(os) ((os)->os_groupused_dnode.dnh_dnode) 127 128 #define DMU_OS_IS_L2CACHEABLE(os) \ 129 ((os)->os_secondary_cache == ZFS_CACHE_ALL || \ 130 (os)->os_secondary_cache == ZFS_CACHE_METADATA) 131 132 /* called from zpl */ 133 int dmu_objset_hold(const char *name, void *tag, objset_t **osp); 134 int dmu_objset_own(const char *name, dmu_objset_type_t type, 135 boolean_t readonly, void *tag, objset_t **osp); 136 void dmu_objset_rele(objset_t *os, void *tag); 137 void dmu_objset_disown(objset_t *os, void *tag); 138 int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp); 139 140 void dmu_objset_stats(objset_t *os, nvlist_t *nv); 141 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat); 142 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 143 uint64_t *usedobjsp, uint64_t *availobjsp); 144 uint64_t dmu_objset_fsid_guid(objset_t *os); 145 int dmu_objset_find_dp(struct dsl_pool *dp, uint64_t ddobj, 146 int func(struct dsl_pool *, struct dsl_dataset *, void *), 147 void *arg, int flags); 148 int dmu_objset_prefetch(const char *name, void *arg); 149 void dmu_objset_evict_dbufs(objset_t *os); 150 timestruc_t dmu_objset_snap_cmtime(objset_t *os); 151 152 /* called from dsl */ 153 void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx); 154 boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg); 155 objset_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds, 156 blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx); 157 int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp, 158 objset_t **osp); 159 void dmu_objset_evict(objset_t *os); 160 void dmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx); 161 void dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx); 162 boolean_t dmu_objset_userused_enabled(objset_t *os); 163 int dmu_objset_userspace_upgrade(objset_t *os); 164 boolean_t dmu_objset_userspace_present(objset_t *os); 165 int dmu_fsname(const char *snapname, char *buf); 166 167 void dmu_objset_init(void); 168 void dmu_objset_fini(void); 169 170 #ifdef __cplusplus 171 } 172 #endif 173 174 #endif /* _SYS_DMU_OBJSET_H */ 175