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 2008 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/arc.h> 33 #include <sys/txg.h> 34 #include <sys/zfs_context.h> 35 #include <sys/dnode.h> 36 #include <sys/zio.h> 37 #include <sys/zil.h> 38 39 #ifdef __cplusplus 40 extern "C" { 41 #endif 42 43 struct dsl_dataset; 44 struct dmu_tx; 45 struct objset_impl; 46 47 typedef struct objset_phys { 48 dnode_phys_t os_meta_dnode; 49 zil_header_t os_zil_header; 50 uint64_t os_type; 51 char os_pad[1024 - sizeof (dnode_phys_t) - sizeof (zil_header_t) - 52 sizeof (uint64_t)]; 53 } objset_phys_t; 54 55 struct objset { 56 struct objset_impl *os; 57 int os_mode; 58 }; 59 60 typedef struct objset_impl { 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 zilog_t *os_zil; 68 objset_t os; 69 uint8_t os_checksum; /* can change, under dsl_dir's locks */ 70 uint8_t os_compress; /* can change, under dsl_dir's locks */ 71 uint8_t os_copies; /* can change, under dsl_dir's locks */ 72 uint8_t os_primary_cache; /* can change, under dsl_dir's locks */ 73 uint8_t os_secondary_cache; /* can change, under dsl_dir's locks */ 74 75 /* no lock needed: */ 76 struct dmu_tx *os_synctx; /* XXX sketchy */ 77 blkptr_t *os_rootbp; 78 zil_header_t os_zil_header; 79 80 /* Protected by os_obj_lock */ 81 kmutex_t os_obj_lock; 82 uint64_t os_obj_next; 83 84 /* Protected by os_lock */ 85 kmutex_t os_lock; 86 list_t os_dirty_dnodes[TXG_SIZE]; 87 list_t os_free_dnodes[TXG_SIZE]; 88 list_t os_dnodes; 89 list_t os_downgraded_dbufs; 90 91 /* stuff we store for the user */ 92 kmutex_t os_user_ptr_lock; 93 void *os_user_ptr; 94 } objset_impl_t; 95 96 #define DMU_META_DNODE_OBJECT 0 97 98 #define DMU_OS_IS_L2CACHEABLE(os) \ 99 ((os)->os_secondary_cache == ZFS_CACHE_ALL || \ 100 (os)->os_secondary_cache == ZFS_CACHE_METADATA) 101 102 /* called from zpl */ 103 int dmu_objset_open(const char *name, dmu_objset_type_t type, int mode, 104 objset_t **osp); 105 void dmu_objset_close(objset_t *os); 106 int dmu_objset_create(const char *name, dmu_objset_type_t type, 107 objset_t *clone_parent, uint64_t flags, 108 void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg); 109 int dmu_objset_destroy(const char *name); 110 int dmu_objset_rollback(objset_t *os); 111 int dmu_objset_snapshot(char *fsname, char *snapname, boolean_t recursive); 112 void dmu_objset_stats(objset_t *os, nvlist_t *nv); 113 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat); 114 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 115 uint64_t *usedobjsp, uint64_t *availobjsp); 116 uint64_t dmu_objset_fsid_guid(objset_t *os); 117 int dmu_objset_find(char *name, int func(char *, void *), void *arg, 118 int flags); 119 int dmu_objset_find_spa(spa_t *spa, const char *name, 120 int func(spa_t *, uint64_t, const char *, void *), void *arg, int flags); 121 void dmu_objset_byteswap(void *buf, size_t size); 122 int dmu_objset_evict_dbufs(objset_t *os); 123 124 /* called from dsl */ 125 void dmu_objset_sync(objset_impl_t *os, zio_t *zio, dmu_tx_t *tx); 126 objset_impl_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds, 127 blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx); 128 int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp, 129 objset_impl_t **osip); 130 void dmu_objset_evict(struct dsl_dataset *ds, void *arg); 131 132 #ifdef __cplusplus 133 } 134 #endif 135 136 #endif /* _SYS_DMU_OBJSET_H */ 137