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 2010 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_DMU_OBJSET_H 27 #define _SYS_DMU_OBJSET_H 28 29 #include <sys/spa.h> 30 #include <sys/arc.h> 31 #include <sys/txg.h> 32 #include <sys/zfs_context.h> 33 #include <sys/dnode.h> 34 #include <sys/zio.h> 35 #include <sys/zil.h> 36 #include <sys/sa.h> 37 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 struct dsl_dataset; 43 struct dmu_tx; 44 45 #define OBJSET_PHYS_SIZE 2048 46 #define OBJSET_OLD_PHYS_SIZE 1024 47 48 #define OBJSET_FLAG_USERACCOUNTING_COMPLETE (1ULL<<0) 49 50 typedef struct objset_phys { 51 dnode_phys_t os_meta_dnode; 52 zil_header_t os_zil_header; 53 uint64_t os_type; 54 uint64_t os_flags; 55 char os_pad[OBJSET_PHYS_SIZE - sizeof (dnode_phys_t)*3 - 56 sizeof (zil_header_t) - sizeof (uint64_t)*2]; 57 dnode_phys_t os_userused_dnode; 58 dnode_phys_t os_groupused_dnode; 59 } objset_phys_t; 60 61 struct objset { 62 /* Immutable: */ 63 struct dsl_dataset *os_dsl_dataset; 64 spa_t *os_spa; 65 arc_buf_t *os_phys_buf; 66 objset_phys_t *os_phys; 67 dnode_t *os_meta_dnode; 68 dnode_t *os_userused_dnode; 69 dnode_t *os_groupused_dnode; 70 zilog_t *os_zil; 71 72 /* can change, under dsl_dir's locks: */ 73 uint8_t os_checksum; 74 uint8_t os_compress; 75 uint8_t os_copies; 76 uint8_t os_dedup_checksum; 77 uint8_t os_dedup_verify; 78 uint8_t os_logbias; 79 uint8_t os_primary_cache; 80 uint8_t os_secondary_cache; 81 82 /* no lock needed: */ 83 struct dmu_tx *os_synctx; /* XXX sketchy */ 84 blkptr_t *os_rootbp; 85 zil_header_t os_zil_header; 86 list_t os_synced_dnodes; 87 uint64_t os_flags; 88 89 /* Protected by os_obj_lock */ 90 kmutex_t os_obj_lock; 91 uint64_t os_obj_next; 92 93 /* Protected by os_lock */ 94 kmutex_t os_lock; 95 list_t os_dirty_dnodes[TXG_SIZE]; 96 list_t os_free_dnodes[TXG_SIZE]; 97 list_t os_dnodes; 98 list_t os_downgraded_dbufs; 99 100 /* stuff we store for the user */ 101 kmutex_t os_user_ptr_lock; 102 void *os_user_ptr; 103 104 /* SA layout/attribute registration */ 105 sa_os_t *os_sa; 106 }; 107 108 #define DMU_META_OBJSET 0 109 #define DMU_META_DNODE_OBJECT 0 110 #define DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0) 111 112 #define DMU_OS_IS_L2CACHEABLE(os) \ 113 ((os)->os_secondary_cache == ZFS_CACHE_ALL || \ 114 (os)->os_secondary_cache == ZFS_CACHE_METADATA) 115 116 /* called from zpl */ 117 int dmu_objset_hold(const char *name, void *tag, objset_t **osp); 118 int dmu_objset_own(const char *name, dmu_objset_type_t type, 119 boolean_t readonly, void *tag, objset_t **osp); 120 void dmu_objset_rele(objset_t *os, void *tag); 121 void dmu_objset_disown(objset_t *os, void *tag); 122 int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp); 123 124 int dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags, 125 void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg); 126 int dmu_objset_clone(const char *name, struct dsl_dataset *clone_origin, 127 uint64_t flags); 128 int dmu_objset_destroy(const char *name, boolean_t defer); 129 int dmu_objset_snapshot(char *fsname, char *snapname, nvlist_t *props, 130 boolean_t recursive); 131 void dmu_objset_stats(objset_t *os, nvlist_t *nv); 132 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat); 133 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 134 uint64_t *usedobjsp, uint64_t *availobjsp); 135 uint64_t dmu_objset_fsid_guid(objset_t *os); 136 int dmu_objset_find(char *name, int func(const char *, void *), void *arg, 137 int flags); 138 int dmu_objset_find_spa(spa_t *spa, const char *name, 139 int func(spa_t *, uint64_t, const char *, void *), void *arg, int flags); 140 int dmu_objset_prefetch(const char *name, void *arg); 141 void dmu_objset_byteswap(void *buf, size_t size); 142 int dmu_objset_evict_dbufs(objset_t *os); 143 timestruc_t dmu_objset_snap_cmtime(objset_t *os); 144 145 /* called from dsl */ 146 void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx); 147 boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg); 148 objset_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds, 149 blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx); 150 int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp, 151 objset_t **osp); 152 void dmu_objset_evict(objset_t *os); 153 void dmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx); 154 void dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before); 155 boolean_t dmu_objset_userused_enabled(objset_t *os); 156 int dmu_objset_userspace_upgrade(objset_t *os); 157 boolean_t dmu_objset_userspace_present(objset_t *os); 158 159 #ifdef __cplusplus 160 } 161 #endif 162 163 #endif /* _SYS_DMU_OBJSET_H */ 164