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 struct dsl_dataset; 44 struct dmu_tx; 45 46 #define OBJSET_PHYS_SIZE 2048 47 #define OBJSET_OLD_PHYS_SIZE 1024 48 49 #define OBJSET_BUF_HAS_USERUSED(buf) \ 50 (arc_buf_size(buf) > OBJSET_OLD_PHYS_SIZE) 51 52 #define OBJSET_FLAG_USERACCOUNTING_COMPLETE (1ULL<<0) 53 54 typedef struct objset_phys { 55 dnode_phys_t os_meta_dnode; 56 zil_header_t os_zil_header; 57 uint64_t os_type; 58 uint64_t os_flags; 59 char os_pad[OBJSET_PHYS_SIZE - sizeof (dnode_phys_t)*3 - 60 sizeof (zil_header_t) - sizeof (uint64_t)*2]; 61 dnode_phys_t os_userused_dnode; 62 dnode_phys_t os_groupused_dnode; 63 } objset_phys_t; 64 65 struct objset { 66 /* Immutable: */ 67 struct dsl_dataset *os_dsl_dataset; 68 spa_t *os_spa; 69 arc_buf_t *os_phys_buf; 70 objset_phys_t *os_phys; 71 dnode_t *os_meta_dnode; 72 dnode_t *os_userused_dnode; 73 dnode_t *os_groupused_dnode; 74 zilog_t *os_zil; 75 76 /* can change, under dsl_dir's locks: */ 77 uint8_t os_checksum; 78 uint8_t os_compress; 79 uint8_t os_copies; 80 uint8_t os_dedup_checksum; 81 uint8_t os_dedup_verify; 82 uint8_t os_logbias; 83 uint8_t os_primary_cache; 84 uint8_t os_secondary_cache; 85 uint8_t os_sync; 86 87 /* no lock needed: */ 88 struct dmu_tx *os_synctx; /* XXX sketchy */ 89 blkptr_t *os_rootbp; 90 zil_header_t os_zil_header; 91 list_t os_synced_dnodes; 92 uint64_t os_flags; 93 94 /* Protected by os_obj_lock */ 95 kmutex_t os_obj_lock; 96 uint64_t os_obj_next; 97 98 /* Protected by os_lock */ 99 kmutex_t os_lock; 100 list_t os_dirty_dnodes[TXG_SIZE]; 101 list_t os_free_dnodes[TXG_SIZE]; 102 list_t os_dnodes; 103 list_t os_downgraded_dbufs; 104 105 /* stuff we store for the user */ 106 kmutex_t os_user_ptr_lock; 107 void *os_user_ptr; 108 109 /* SA layout/attribute registration */ 110 sa_os_t *os_sa; 111 }; 112 113 #define DMU_META_OBJSET 0 114 #define DMU_META_DNODE_OBJECT 0 115 #define DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0) 116 117 #define DMU_OS_IS_L2CACHEABLE(os) \ 118 ((os)->os_secondary_cache == ZFS_CACHE_ALL || \ 119 (os)->os_secondary_cache == ZFS_CACHE_METADATA) 120 121 /* called from zpl */ 122 int dmu_objset_hold(const char *name, void *tag, objset_t **osp); 123 int dmu_objset_own(const char *name, dmu_objset_type_t type, 124 boolean_t readonly, void *tag, objset_t **osp); 125 void dmu_objset_rele(objset_t *os, void *tag); 126 void dmu_objset_disown(objset_t *os, void *tag); 127 int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp); 128 129 int dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags, 130 void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg); 131 int dmu_objset_clone(const char *name, struct dsl_dataset *clone_origin, 132 uint64_t flags); 133 int dmu_objset_destroy(const char *name, boolean_t defer); 134 int dmu_objset_snapshot(char *fsname, char *snapname, nvlist_t *props, 135 boolean_t recursive); 136 void dmu_objset_stats(objset_t *os, nvlist_t *nv); 137 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat); 138 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 139 uint64_t *usedobjsp, uint64_t *availobjsp); 140 uint64_t dmu_objset_fsid_guid(objset_t *os); 141 int dmu_objset_find(char *name, int func(const char *, void *), void *arg, 142 int flags); 143 int dmu_objset_find_spa(spa_t *spa, const char *name, 144 int func(spa_t *, uint64_t, const char *, void *), void *arg, int flags); 145 int dmu_objset_prefetch(const char *name, void *arg); 146 void dmu_objset_byteswap(void *buf, size_t size); 147 int dmu_objset_evict_dbufs(objset_t *os); 148 timestruc_t dmu_objset_snap_cmtime(objset_t *os); 149 150 /* called from dsl */ 151 void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx); 152 boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg); 153 objset_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds, 154 blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx); 155 int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp, 156 objset_t **osp); 157 void dmu_objset_evict(objset_t *os); 158 void dmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx); 159 void dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx); 160 boolean_t dmu_objset_userused_enabled(objset_t *os); 161 int dmu_objset_userspace_upgrade(objset_t *os); 162 boolean_t dmu_objset_userspace_present(objset_t *os); 163 164 #ifdef __cplusplus 165 } 166 #endif 167 168 #endif /* _SYS_DMU_OBJSET_H */ 169