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 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved. 26 */ 27 28 /* Portions Copyright 2010 Robert Milkowski */ 29 30 #ifndef _SYS_DMU_OBJSET_H 31 #define _SYS_DMU_OBJSET_H 32 33 #include <sys/spa.h> 34 #include <sys/arc.h> 35 #include <sys/txg.h> 36 #include <sys/zfs_context.h> 37 #include <sys/dnode.h> 38 #include <sys/zio.h> 39 #include <sys/zil.h> 40 #include <sys/sa.h> 41 42 #ifdef __cplusplus 43 extern "C" { 44 #endif 45 46 extern krwlock_t os_lock; 47 48 struct dsl_pool; 49 struct dsl_dataset; 50 struct dmu_tx; 51 52 #define OBJSET_PHYS_SIZE 2048 53 #define OBJSET_OLD_PHYS_SIZE 1024 54 55 #define OBJSET_BUF_HAS_USERUSED(buf) \ 56 (arc_buf_size(buf) > OBJSET_OLD_PHYS_SIZE) 57 58 #define OBJSET_FLAG_USERACCOUNTING_COMPLETE (1ULL<<0) 59 60 typedef struct objset_phys { 61 dnode_phys_t os_meta_dnode; 62 zil_header_t os_zil_header; 63 uint64_t os_type; 64 uint64_t os_flags; 65 char os_pad[OBJSET_PHYS_SIZE - sizeof (dnode_phys_t)*3 - 66 sizeof (zil_header_t) - sizeof (uint64_t)*2]; 67 dnode_phys_t os_userused_dnode; 68 dnode_phys_t os_groupused_dnode; 69 } objset_phys_t; 70 71 struct objset { 72 /* Immutable: */ 73 struct dsl_dataset *os_dsl_dataset; 74 spa_t *os_spa; 75 arc_buf_t *os_phys_buf; 76 objset_phys_t *os_phys; 77 /* 78 * The following "special" dnodes have no parent, are exempt 79 * from dnode_move(), and are not recorded in os_dnodes, but they 80 * root their descendents in this objset using handles anyway, so 81 * that all access to dnodes from dbufs consistently uses handles. 82 */ 83 dnode_handle_t os_meta_dnode; 84 dnode_handle_t os_userused_dnode; 85 dnode_handle_t os_groupused_dnode; 86 zilog_t *os_zil; 87 88 list_node_t os_evicting_node; 89 90 /* can change, under dsl_dir's locks: */ 91 enum zio_checksum os_checksum; 92 enum zio_compress os_compress; 93 uint8_t os_copies; 94 enum zio_checksum os_dedup_checksum; 95 boolean_t os_dedup_verify; 96 boolean_t os_evicting; 97 zfs_logbias_op_t os_logbias; 98 zfs_cache_type_t os_primary_cache; 99 zfs_cache_type_t os_secondary_cache; 100 zfs_sync_type_t os_sync; 101 zfs_redundant_metadata_type_t os_redundant_metadata; 102 int os_recordsize; 103 104 /* no lock needed: */ 105 struct dmu_tx *os_synctx; /* XXX sketchy */ 106 blkptr_t *os_rootbp; 107 zil_header_t os_zil_header; 108 list_t os_synced_dnodes; 109 uint64_t os_flags; 110 111 /* Protected by os_obj_lock */ 112 kmutex_t os_obj_lock; 113 uint64_t os_obj_next; 114 115 /* Protected by os_lock */ 116 kmutex_t os_lock; 117 list_t os_dirty_dnodes[TXG_SIZE]; 118 list_t os_free_dnodes[TXG_SIZE]; 119 list_t os_dnodes; 120 list_t os_downgraded_dbufs; 121 122 /* stuff we store for the user */ 123 kmutex_t os_user_ptr_lock; 124 void *os_user_ptr; 125 sa_os_t *os_sa; 126 }; 127 128 #define DMU_META_OBJSET 0 129 #define DMU_META_DNODE_OBJECT 0 130 #define DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0) 131 #define DMU_META_DNODE(os) ((os)->os_meta_dnode.dnh_dnode) 132 #define DMU_USERUSED_DNODE(os) ((os)->os_userused_dnode.dnh_dnode) 133 #define DMU_GROUPUSED_DNODE(os) ((os)->os_groupused_dnode.dnh_dnode) 134 135 #define DMU_OS_IS_L2CACHEABLE(os) \ 136 ((os)->os_secondary_cache == ZFS_CACHE_ALL || \ 137 (os)->os_secondary_cache == ZFS_CACHE_METADATA) 138 139 #define DMU_OS_IS_L2COMPRESSIBLE(os) (zfs_mdcomp_disable == B_FALSE) 140 141 /* called from zpl */ 142 int dmu_objset_hold(const char *name, void *tag, objset_t **osp); 143 int dmu_objset_own(const char *name, dmu_objset_type_t type, 144 boolean_t readonly, void *tag, objset_t **osp); 145 void dmu_objset_refresh_ownership(objset_t *os, void *tag); 146 void dmu_objset_rele(objset_t *os, void *tag); 147 void dmu_objset_disown(objset_t *os, void *tag); 148 int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp); 149 150 void dmu_objset_stats(objset_t *os, nvlist_t *nv); 151 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat); 152 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 153 uint64_t *usedobjsp, uint64_t *availobjsp); 154 uint64_t dmu_objset_fsid_guid(objset_t *os); 155 int dmu_objset_find_dp(struct dsl_pool *dp, uint64_t ddobj, 156 int func(struct dsl_pool *, struct dsl_dataset *, void *), 157 void *arg, int flags); 158 int dmu_objset_prefetch(const char *name, void *arg); 159 void dmu_objset_evict_dbufs(objset_t *os); 160 timestruc_t dmu_objset_snap_cmtime(objset_t *os); 161 162 /* called from dsl */ 163 void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx); 164 boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg); 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 int dmu_fsname(const char *snapname, char *buf); 176 177 void dmu_objset_evict_done(objset_t *os); 178 179 void dmu_objset_init(void); 180 void dmu_objset_fini(void); 181 182 #ifdef __cplusplus 183 } 184 #endif 185 186 #endif /* _SYS_DMU_OBJSET_H */ 187