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, 2014 by Delphix. All rights reserved. 24 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved. 25 */ 26 27 /* Portions Copyright 2010 Robert Milkowski */ 28 29 #ifndef _SYS_DMU_OBJSET_H 30 #define _SYS_DMU_OBJSET_H 31 32 #include <sys/spa.h> 33 #include <sys/arc.h> 34 #include <sys/txg.h> 35 #include <sys/zfs_context.h> 36 #include <sys/dnode.h> 37 #include <sys/zio.h> 38 #include <sys/zil.h> 39 #include <sys/sa.h> 40 41 #ifdef __cplusplus 42 extern "C" { 43 #endif 44 45 extern krwlock_t os_lock; 46 47 struct dsl_pool; 48 struct dsl_dataset; 49 struct dmu_tx; 50 51 #define OBJSET_PHYS_SIZE 2048 52 #define OBJSET_OLD_PHYS_SIZE 1024 53 54 #define OBJSET_BUF_HAS_USERUSED(buf) \ 55 (arc_buf_size(buf) > OBJSET_OLD_PHYS_SIZE) 56 57 #define OBJSET_FLAG_USERACCOUNTING_COMPLETE (1ULL<<0) 58 59 typedef struct objset_phys { 60 dnode_phys_t os_meta_dnode; 61 zil_header_t os_zil_header; 62 uint64_t os_type; 63 uint64_t os_flags; 64 char os_pad[OBJSET_PHYS_SIZE - sizeof (dnode_phys_t)*3 - 65 sizeof (zil_header_t) - sizeof (uint64_t)*2]; 66 dnode_phys_t os_userused_dnode; 67 dnode_phys_t os_groupused_dnode; 68 } objset_phys_t; 69 70 struct objset { 71 /* Immutable: */ 72 struct dsl_dataset *os_dsl_dataset; 73 spa_t *os_spa; 74 arc_buf_t *os_phys_buf; 75 objset_phys_t *os_phys; 76 /* 77 * The following "special" dnodes have no parent and are exempt from 78 * dnode_move(), but they root their descendents in this objset using 79 * handles anyway, so that all access to dnodes from dbufs consistently 80 * uses handles. 81 */ 82 dnode_handle_t os_meta_dnode; 83 dnode_handle_t os_userused_dnode; 84 dnode_handle_t os_groupused_dnode; 85 zilog_t *os_zil; 86 87 /* can change, under dsl_dir's locks: */ 88 enum zio_checksum os_checksum; 89 enum zio_compress os_compress; 90 uint8_t os_copies; 91 enum zio_checksum os_dedup_checksum; 92 boolean_t os_dedup_verify; 93 zfs_logbias_op_t os_logbias; 94 zfs_cache_type_t os_primary_cache; 95 zfs_cache_type_t os_secondary_cache; 96 zfs_sync_type_t os_sync; 97 zfs_redundant_metadata_type_t os_redundant_metadata; 98 99 /* no lock needed: */ 100 struct dmu_tx *os_synctx; /* XXX sketchy */ 101 blkptr_t *os_rootbp; 102 zil_header_t os_zil_header; 103 list_t os_synced_dnodes; 104 uint64_t os_flags; 105 106 /* Protected by os_obj_lock */ 107 kmutex_t os_obj_lock; 108 uint64_t os_obj_next; 109 110 /* Protected by os_lock */ 111 kmutex_t os_lock; 112 list_t os_dirty_dnodes[TXG_SIZE]; 113 list_t os_free_dnodes[TXG_SIZE]; 114 list_t os_dnodes; 115 list_t os_downgraded_dbufs; 116 117 /* stuff we store for the user */ 118 kmutex_t os_user_ptr_lock; 119 void *os_user_ptr; 120 sa_os_t *os_sa; 121 }; 122 123 #define DMU_META_OBJSET 0 124 #define DMU_META_DNODE_OBJECT 0 125 #define DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0) 126 #define DMU_META_DNODE(os) ((os)->os_meta_dnode.dnh_dnode) 127 #define DMU_USERUSED_DNODE(os) ((os)->os_userused_dnode.dnh_dnode) 128 #define DMU_GROUPUSED_DNODE(os) ((os)->os_groupused_dnode.dnh_dnode) 129 130 #define DMU_OS_IS_L2CACHEABLE(os) \ 131 ((os)->os_secondary_cache == ZFS_CACHE_ALL || \ 132 (os)->os_secondary_cache == ZFS_CACHE_METADATA) 133 134 #define DMU_OS_IS_L2COMPRESSIBLE(os) (zfs_mdcomp_disable == B_FALSE) 135 136 /* called from zpl */ 137 int dmu_objset_hold(const char *name, void *tag, objset_t **osp); 138 int dmu_objset_own(const char *name, dmu_objset_type_t type, 139 boolean_t readonly, void *tag, objset_t **osp); 140 void dmu_objset_refresh_ownership(objset_t *os, void *tag); 141 void dmu_objset_rele(objset_t *os, void *tag); 142 void dmu_objset_disown(objset_t *os, void *tag); 143 int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp); 144 145 void dmu_objset_stats(objset_t *os, nvlist_t *nv); 146 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat); 147 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 148 uint64_t *usedobjsp, uint64_t *availobjsp); 149 uint64_t dmu_objset_fsid_guid(objset_t *os); 150 int dmu_objset_find_dp(struct dsl_pool *dp, uint64_t ddobj, 151 int func(struct dsl_pool *, struct dsl_dataset *, void *), 152 void *arg, int flags); 153 int dmu_objset_prefetch(const char *name, void *arg); 154 void dmu_objset_evict_dbufs(objset_t *os); 155 timestruc_t dmu_objset_snap_cmtime(objset_t *os); 156 157 /* called from dsl */ 158 void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx); 159 boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg); 160 objset_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds, 161 blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx); 162 int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp, 163 objset_t **osp); 164 void dmu_objset_evict(objset_t *os); 165 void dmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx); 166 void dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx); 167 boolean_t dmu_objset_userused_enabled(objset_t *os); 168 int dmu_objset_userspace_upgrade(objset_t *os); 169 boolean_t dmu_objset_userspace_present(objset_t *os); 170 int dmu_fsname(const char *snapname, char *buf); 171 172 void dmu_objset_init(void); 173 void dmu_objset_fini(void); 174 175 #ifdef __cplusplus 176 } 177 #endif 178 179 #endif /* _SYS_DMU_OBJSET_H */ 180