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 38 extern "C" { 39 #endif 40 41 struct dsl_dataset; 42 struct dmu_tx; 43 struct objset_impl; 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 struct objset_impl *os; 63 int os_mode; 64 }; 65 66 typedef struct objset_impl { 67 /* Immutable: */ 68 struct dsl_dataset *os_dsl_dataset; 69 spa_t *os_spa; 70 arc_buf_t *os_phys_buf; 71 objset_phys_t *os_phys; 72 dnode_t *os_meta_dnode; 73 dnode_t *os_userused_dnode; 74 dnode_t *os_groupused_dnode; 75 zilog_t *os_zil; 76 objset_t os; 77 uint8_t os_checksum; /* can change, under dsl_dir's locks */ 78 uint8_t os_compress; /* can change, under dsl_dir's locks */ 79 uint8_t os_copies; /* can change, under dsl_dir's locks */ 80 uint8_t os_primary_cache; /* can change, under dsl_dir's locks */ 81 uint8_t os_secondary_cache; /* can change, under dsl_dir's locks */ 82 83 /* no lock needed: */ 84 struct dmu_tx *os_synctx; /* XXX sketchy */ 85 blkptr_t *os_rootbp; 86 zil_header_t os_zil_header; 87 list_t os_synced_dnodes; 88 uint64_t os_flags; 89 90 /* Protected by os_obj_lock */ 91 kmutex_t os_obj_lock; 92 uint64_t os_obj_next; 93 94 /* Protected by os_lock */ 95 kmutex_t os_lock; 96 list_t os_dirty_dnodes[TXG_SIZE]; 97 list_t os_free_dnodes[TXG_SIZE]; 98 list_t os_dnodes; 99 list_t os_downgraded_dbufs; 100 101 /* stuff we store for the user */ 102 kmutex_t os_user_ptr_lock; 103 void *os_user_ptr; 104 } objset_impl_t; 105 106 #define DMU_META_DNODE_OBJECT 0 107 #define DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0) 108 109 #define DMU_OS_IS_L2CACHEABLE(os) \ 110 ((os)->os_secondary_cache == ZFS_CACHE_ALL || \ 111 (os)->os_secondary_cache == ZFS_CACHE_METADATA) 112 113 /* called from zpl */ 114 int dmu_objset_open(const char *name, dmu_objset_type_t type, int mode, 115 objset_t **osp); 116 void dmu_objset_close(objset_t *os); 117 int dmu_objset_create(const char *name, dmu_objset_type_t type, 118 objset_t *clone_parent, uint64_t flags, 119 void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg); 120 int dmu_objset_destroy(const char *name, boolean_t defer); 121 int dmu_objset_rollback(objset_t *os); 122 int dmu_objset_snapshot(char *fsname, char *snapname, nvlist_t *props, 123 boolean_t recursive); 124 void dmu_objset_stats(objset_t *os, nvlist_t *nv); 125 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat); 126 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 127 uint64_t *usedobjsp, uint64_t *availobjsp); 128 uint64_t dmu_objset_fsid_guid(objset_t *os); 129 int dmu_objset_find(char *name, int func(char *, void *), void *arg, 130 int flags); 131 int dmu_objset_find_spa(spa_t *spa, const char *name, 132 int func(spa_t *, uint64_t, const char *, void *), void *arg, int flags); 133 int dmu_objset_prefetch(char *name, void *arg); 134 void dmu_objset_byteswap(void *buf, size_t size); 135 int dmu_objset_evict_dbufs(objset_t *os); 136 137 /* called from dsl */ 138 void dmu_objset_sync(objset_impl_t *os, zio_t *zio, dmu_tx_t *tx); 139 objset_impl_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds, 140 blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx); 141 int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp, 142 objset_impl_t **osip); 143 void dmu_objset_evict(struct dsl_dataset *ds, void *arg); 144 void dmu_objset_do_userquota_callbacks(objset_impl_t *os, dmu_tx_t *tx); 145 boolean_t dmu_objset_userused_enabled(objset_impl_t *os); 146 int dmu_objset_userspace_upgrade(objset_t *os); 147 boolean_t dmu_objset_userspace_present(objset_t *os); 148 149 #ifdef __cplusplus 150 } 151 #endif 152 153 #endif /* _SYS_DMU_OBJSET_H */ 154