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 2006 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 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <sys/spa.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 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 struct dsl_dataset; 43 struct dmu_tx; 44 struct objset_impl; 45 46 typedef struct objset_phys { 47 dnode_phys_t os_meta_dnode; 48 zil_header_t os_zil_header; 49 uint64_t os_type; 50 char os_pad[1024 - sizeof (dnode_phys_t) - sizeof (zil_header_t) - 51 sizeof (uint64_t)]; 52 } objset_phys_t; 53 54 struct objset { 55 struct objset_impl *os; 56 int os_mode; 57 }; 58 59 typedef struct objset_impl { 60 /* Immutable: */ 61 struct dsl_dataset *os_dsl_dataset; 62 spa_t *os_spa; 63 objset_phys_t *os_phys; 64 dnode_t *os_meta_dnode; 65 zilog_t *os_zil; 66 objset_t os; 67 uint8_t os_checksum; /* can change, under dsl_dir's locks */ 68 uint8_t os_compress; /* can change, under dsl_dir's locks */ 69 uint8_t os_md_checksum; 70 uint8_t os_md_compress; 71 72 /* no lock needed: */ 73 struct dmu_tx *os_synctx; /* XXX sketchy */ 74 blkptr_t os_rootbp; 75 76 /* Protected by os_obj_lock */ 77 kmutex_t os_obj_lock; 78 uint64_t os_obj_next; 79 80 /* Protected by os_lock */ 81 kmutex_t os_lock; 82 list_t os_dirty_dnodes[TXG_SIZE]; 83 list_t os_free_dnodes[TXG_SIZE]; 84 list_t os_dnodes; 85 list_t os_downgraded_dbufs; 86 } objset_impl_t; 87 88 #define DMU_META_DNODE_OBJECT 0 89 90 /* called from zpl */ 91 int dmu_objset_open(const char *name, dmu_objset_type_t type, int mode, 92 objset_t **osp); 93 void dmu_objset_close(objset_t *os); 94 int dmu_objset_create(const char *name, dmu_objset_type_t type, 95 objset_t *clone_parent, 96 void (*func)(objset_t *os, void *arg, dmu_tx_t *tx), void *arg); 97 int dmu_objset_destroy(const char *name); 98 int dmu_objset_rollback(const char *name); 99 int dmu_objset_snapshot(char *fsname, char *snapname, boolean_t recursive); 100 void dmu_objset_stats(objset_t *os, nvlist_t *nv); 101 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat); 102 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 103 uint64_t *usedobjsp, uint64_t *availobjsp); 104 uint64_t dmu_objset_fsid_guid(objset_t *os); 105 int dmu_objset_find(char *name, int func(char *, void *), void *arg, 106 int flags); 107 void dmu_objset_byteswap(void *buf, size_t size); 108 int dmu_objset_evict_dbufs(objset_t *os, int try); 109 110 /* called from dsl */ 111 void dmu_objset_sync(objset_impl_t *os, dmu_tx_t *tx); 112 objset_impl_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds, 113 dmu_objset_type_t type, dmu_tx_t *tx); 114 int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp, 115 objset_impl_t **osip); 116 void dmu_objset_evict(struct dsl_dataset *ds, void *arg); 117 118 #ifdef __cplusplus 119 } 120 #endif 121 122 #endif /* _SYS_DMU_OBJSET_H */ 123