dmu_objset.h revision 1.1.1.2
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 2009 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 37#ifdef __cplusplus 38extern "C" { 39#endif 40 41struct dsl_dataset; 42struct dmu_tx; 43 44#define OBJSET_PHYS_SIZE 2048 45#define OBJSET_OLD_PHYS_SIZE 1024 46 47#define OBJSET_FLAG_USERACCOUNTING_COMPLETE (1ULL<<0) 48 49typedef struct objset_phys { 50 dnode_phys_t os_meta_dnode; 51 zil_header_t os_zil_header; 52 uint64_t os_type; 53 uint64_t os_flags; 54 char os_pad[OBJSET_PHYS_SIZE - sizeof (dnode_phys_t)*3 - 55 sizeof (zil_header_t) - sizeof (uint64_t)*2]; 56 dnode_phys_t os_userused_dnode; 57 dnode_phys_t os_groupused_dnode; 58} objset_phys_t; 59 60struct objset { 61 /* Immutable: */ 62 struct dsl_dataset *os_dsl_dataset; 63 spa_t *os_spa; 64 arc_buf_t *os_phys_buf; 65 objset_phys_t *os_phys; 66 dnode_t *os_meta_dnode; 67 dnode_t *os_userused_dnode; 68 dnode_t *os_groupused_dnode; 69 zilog_t *os_zil; 70 71 /* can change, under dsl_dir's locks: */ 72 uint8_t os_checksum; 73 uint8_t os_compress; 74 uint8_t os_copies; 75 uint8_t os_dedup_checksum; 76 uint8_t os_dedup_verify; 77 uint8_t os_logbias; 78 uint8_t os_primary_cache; 79 uint8_t os_secondary_cache; 80 81 /* no lock needed: */ 82 struct dmu_tx *os_synctx; /* XXX sketchy */ 83 blkptr_t *os_rootbp; 84 zil_header_t os_zil_header; 85 list_t os_synced_dnodes; 86 uint64_t os_flags; 87 88 /* Protected by os_obj_lock */ 89 kmutex_t os_obj_lock; 90 uint64_t os_obj_next; 91 92 /* Protected by os_lock */ 93 kmutex_t os_lock; 94 list_t os_dirty_dnodes[TXG_SIZE]; 95 list_t os_free_dnodes[TXG_SIZE]; 96 list_t os_dnodes; 97 list_t os_downgraded_dbufs; 98 99 /* stuff we store for the user */ 100 kmutex_t os_user_ptr_lock; 101 void *os_user_ptr; 102}; 103 104#define DMU_META_OBJSET 0 105#define DMU_META_DNODE_OBJECT 0 106#define DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0) 107 108#define DMU_OS_IS_L2CACHEABLE(os) \ 109 ((os)->os_secondary_cache == ZFS_CACHE_ALL || \ 110 (os)->os_secondary_cache == ZFS_CACHE_METADATA) 111 112/* called from zpl */ 113int dmu_objset_hold(const char *name, void *tag, objset_t **osp); 114int dmu_objset_own(const char *name, dmu_objset_type_t type, 115 boolean_t readonly, void *tag, objset_t **osp); 116void dmu_objset_rele(objset_t *os, void *tag); 117void dmu_objset_disown(objset_t *os, void *tag); 118int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp); 119 120int dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags, 121 void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg); 122int dmu_objset_clone(const char *name, struct dsl_dataset *clone_origin, 123 uint64_t flags); 124int dmu_objset_destroy(const char *name, boolean_t defer); 125int dmu_objset_snapshot(char *fsname, char *snapname, nvlist_t *props, 126 boolean_t recursive); 127void dmu_objset_stats(objset_t *os, nvlist_t *nv); 128void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat); 129void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 130 uint64_t *usedobjsp, uint64_t *availobjsp); 131uint64_t dmu_objset_fsid_guid(objset_t *os); 132int dmu_objset_find(char *name, int func(const char *, void *), void *arg, 133 int flags); 134int dmu_objset_find_spa(spa_t *spa, const char *name, 135 int func(spa_t *, uint64_t, const char *, void *), void *arg, int flags); 136int dmu_objset_prefetch(const char *name, void *arg); 137void dmu_objset_byteswap(void *buf, size_t size); 138int dmu_objset_evict_dbufs(objset_t *os); 139timestruc_t dmu_objset_snap_cmtime(objset_t *os); 140 141/* called from dsl */ 142void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx); 143boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg); 144objset_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds, 145 blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx); 146int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp, 147 objset_t **osp); 148void dmu_objset_evict(objset_t *os); 149void dmu_objset_do_userquota_callbacks(objset_t *os, dmu_tx_t *tx); 150boolean_t dmu_objset_userused_enabled(objset_t *os); 151int dmu_objset_userspace_upgrade(objset_t *os); 152boolean_t dmu_objset_userspace_present(objset_t *os); 153 154#ifdef __cplusplus 155} 156#endif 157 158#endif /* _SYS_DMU_OBJSET_H */ 159