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 44 #define OBJSET_PHYS_SIZE 2048 45 #define OBJSET_OLD_PHYS_SIZE 1024 46 47 #define OBJSET_FLAG_USERACCOUNTING_COMPLETE (1ULL<<0) 48 49 typedef 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 60 struct 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 uint8_t os_checksum; /* can change, under dsl_dir's locks */ 71 uint8_t os_compress; /* can change, under dsl_dir's locks */ 72 uint8_t os_copies; /* can change, under dsl_dir's locks */ 73 uint8_t os_primary_cache; /* can change, under dsl_dir's locks */ 74 uint8_t os_secondary_cache; /* can change, under dsl_dir's locks */ 75 uint8_t os_logbias; /* can change, under dsl_dir's locks */ 76 77 /* no lock needed: */ 78 struct dmu_tx *os_synctx; /* XXX sketchy */ 79 blkptr_t *os_rootbp; 80 zil_header_t os_zil_header; 81 list_t os_synced_dnodes; 82 uint64_t os_flags; 83 84 /* Protected by os_obj_lock */ 85 kmutex_t os_obj_lock; 86 uint64_t os_obj_next; 87 88 /* Protected by os_lock */ 89 kmutex_t os_lock; 90 list_t os_dirty_dnodes[TXG_SIZE]; 91 list_t os_free_dnodes[TXG_SIZE]; 92 list_t os_dnodes; 93 list_t os_downgraded_dbufs; 94 95 /* stuff we store for the user */ 96 kmutex_t os_user_ptr_lock; 97 void *os_user_ptr; 98 }; 99 100 #define DMU_META_DNODE_OBJECT 0 101 #define DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0) 102 103 #define DMU_OS_IS_L2CACHEABLE(os) \ 104 ((os)->os_secondary_cache == ZFS_CACHE_ALL || \ 105 (os)->os_secondary_cache == ZFS_CACHE_METADATA) 106 107 /* called from zpl */ 108 int dmu_objset_hold(const char *name, void *tag, objset_t **osp); 109 int dmu_objset_own(const char *name, dmu_objset_type_t type, 110 boolean_t readonly, void *tag, objset_t **osp); 111 void dmu_objset_rele(objset_t *os, void *tag); 112 void dmu_objset_disown(objset_t *os, void *tag); 113 int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp); 114 115 int dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags, 116 void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg); 117 int dmu_objset_clone(const char *name, struct dsl_dataset *clone_origin, 118 uint64_t flags); 119 int dmu_objset_destroy(const char *name, boolean_t defer); 120 int dmu_objset_snapshot(char *fsname, char *snapname, nvlist_t *props, 121 boolean_t recursive); 122 void dmu_objset_stats(objset_t *os, nvlist_t *nv); 123 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat); 124 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp, 125 uint64_t *usedobjsp, uint64_t *availobjsp); 126 uint64_t dmu_objset_fsid_guid(objset_t *os); 127 int dmu_objset_find(char *name, int func(char *, void *), void *arg, 128 int flags); 129 int dmu_objset_find_spa(spa_t *spa, const char *name, 130 int func(spa_t *, uint64_t, const char *, void *), void *arg, int flags); 131 int dmu_objset_prefetch(char *name, void *arg); 132 void dmu_objset_byteswap(void *buf, size_t size); 133 int dmu_objset_evict_dbufs(objset_t *os); 134 timestruc_t dmu_objset_snap_cmtime(objset_t *os); 135 136 /* called from dsl */ 137 void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx); 138 objset_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds, 139 blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx); 140 int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp, 141 objset_t **osp); 142 void dmu_objset_evict(objset_t *os); 143 void dmu_objset_do_userquota_callbacks(objset_t *os, dmu_tx_t *tx); 144 boolean_t dmu_objset_userused_enabled(objset_t *os); 145 int dmu_objset_userspace_upgrade(objset_t *os); 146 boolean_t dmu_objset_userspace_present(objset_t *os); 147 148 #ifdef __cplusplus 149 } 150 #endif 151 152 #endif /* _SYS_DMU_OBJSET_H */ 153