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 */ 24 25 /* Portions Copyright 2010 Robert Milkowski */ 26 27 #ifndef _SYS_DMU_OBJSET_H 28 #define _SYS_DMU_OBJSET_H 29 30 #include <sys/spa.h> 31 #include <sys/arc.h> 32 #include <sys/txg.h> 33 #include <sys/zfs_context.h> 34 #include <sys/dnode.h> 35 #include <sys/zio.h> 36 #include <sys/zil.h> 37 #include <sys/sa.h> 38 39 #ifdef __cplusplus 40 extern "C" { 41 #endif 42 43 extern krwlock_t os_lock; 44 45 struct dsl_dataset; 46 struct dmu_tx; 47 48 #define OBJSET_PHYS_SIZE 2048 49 #define OBJSET_OLD_PHYS_SIZE 1024 50 51 #define OBJSET_BUF_HAS_USERUSED(buf) \ 52 (arc_buf_size(buf) > OBJSET_OLD_PHYS_SIZE) 53 54 #define OBJSET_FLAG_USERACCOUNTING_COMPLETE (1ULL<<0) 55 56 typedef struct objset_phys { 57 dnode_phys_t os_meta_dnode; 58 zil_header_t os_zil_header; 59 uint64_t os_type; 60 uint64_t os_flags; 61 char os_pad[OBJSET_PHYS_SIZE - sizeof (dnode_phys_t)*3 - 62 sizeof (zil_header_t) - sizeof (uint64_t)*2]; 63 dnode_phys_t os_userused_dnode; 64 dnode_phys_t os_groupused_dnode; 65 } objset_phys_t; 66 67 struct objset { 68 /* Immutable: */ 69 struct dsl_dataset *os_dsl_dataset; 70 spa_t *os_spa; 71 arc_buf_t *os_phys_buf; 72 objset_phys_t *os_phys; 73 /* 74 * The following "special" dnodes have no parent and are exempt from 75 * dnode_move(), but they root their descendents in this objset using 76 * handles anyway, so that all access to dnodes from dbufs consistently 77 * uses handles. 78 */ 79 dnode_handle_t os_meta_dnode; 80 dnode_handle_t os_userused_dnode; 81 dnode_handle_t os_groupused_dnode; 82 zilog_t *os_zil; 83 84 /* can change, under dsl_dir's locks: */ 85 uint8_t os_checksum; 86 uint8_t os_compress; 87 uint8_t os_copies; 88 uint8_t os_dedup_checksum; 89 uint8_t os_dedup_verify; 90 uint8_t os_logbias; 91 uint8_t os_primary_cache; 92 uint8_t os_secondary_cache; 93 uint8_t os_sync; 94 95 /* no lock needed: */ 96 struct dmu_tx *os_synctx; /* XXX sketchy */ 97 blkptr_t *os_rootbp; 98 zil_header_t os_zil_header; 99 list_t os_synced_dnodes; 100 uint64_t os_flags; 101 102 /* Protected by os_obj_lock */ 103 kmutex_t os_obj_lock; 104 uint64_t os_obj_next; 105 106 /* Protected by os_lock */ 107 kmutex_t os_lock; 108 list_t os_dirty_dnodes[TXG_SIZE]; 109 list_t os_free_dnodes[TXG_SIZE]; 110 list_t os_dnodes; 111 list_t os_downgraded_dbufs; 112 113 /* stuff we store for the user */ 114 kmutex_t os_user_ptr_lock; 115 void *os_user_ptr; 116 117 /* SA layout/attribute registration */ 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 int dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags, 141 void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg); 142 int dmu_objset_clone(const char *name, struct dsl_dataset *clone_origin, 143 uint64_t flags); 144 int dmu_objset_destroy(const char *name, boolean_t defer); 145 int dmu_objset_snapshot(char *fsname, char *snapname, char *tag, 146 struct nvlist *props, boolean_t recursive, boolean_t temporary, int fd); 147 void dmu_objset_stats(objset_t *os, nvlist_t *nv); 148 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat); 149 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 150 uint64_t *usedobjsp, uint64_t *availobjsp); 151 uint64_t dmu_objset_fsid_guid(objset_t *os); 152 int dmu_objset_find(char *name, int func(const char *, void *), void *arg, 153 int flags); 154 int dmu_objset_find_spa(spa_t *spa, const char *name, 155 int func(spa_t *, uint64_t, const char *, void *), void *arg, int flags); 156 int dmu_objset_prefetch(const char *name, void *arg); 157 void dmu_objset_byteswap(void *buf, size_t size); 158 int dmu_objset_evict_dbufs(objset_t *os); 159 timestruc_t dmu_objset_snap_cmtime(objset_t *os); 160 161 /* called from dsl */ 162 void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx); 163 boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg); 164 boolean_t dmu_objset_is_dirty_anywhere(objset_t *os); 165 objset_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds, 166 blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx); 167 int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp, 168 objset_t **osp); 169 void dmu_objset_evict(objset_t *os); 170 void dmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx); 171 void dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx); 172 boolean_t dmu_objset_userused_enabled(objset_t *os); 173 int dmu_objset_userspace_upgrade(objset_t *os); 174 boolean_t dmu_objset_userspace_present(objset_t *os); 175 176 void dmu_objset_init(void); 177 void dmu_objset_fini(void); 178 179 #ifdef __cplusplus 180 } 181 #endif 182 183 #endif /* _SYS_DMU_OBJSET_H */ 184