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