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.
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.
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]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
26 /* Portions Copyright 2010 Robert Milkowski */
28 #ifndef _SYS_DMU_OBJSET_H
29 #define _SYS_DMU_OBJSET_H
34 #include <sys/zfs_context.h>
35 #include <sys/dnode.h>
44 extern krwlock_t os_lock;
49 #define OBJSET_PHYS_SIZE 2048
50 #define OBJSET_OLD_PHYS_SIZE 1024
52 #define OBJSET_BUF_HAS_USERUSED(buf) \
53 (arc_buf_size(buf) > OBJSET_OLD_PHYS_SIZE)
55 #define OBJSET_FLAG_USERACCOUNTING_COMPLETE (1ULL<<0)
57 typedef struct objset_phys {
58 dnode_phys_t os_meta_dnode;
59 zil_header_t os_zil_header;
62 char os_pad[OBJSET_PHYS_SIZE - sizeof (dnode_phys_t)*3 -
63 sizeof (zil_header_t) - sizeof (uint64_t)*2];
64 dnode_phys_t os_userused_dnode;
65 dnode_phys_t os_groupused_dnode;
70 struct dsl_dataset *os_dsl_dataset;
72 arc_buf_t *os_phys_buf;
73 objset_phys_t *os_phys;
75 * The following "special" dnodes have no parent and are exempt from
76 * dnode_move(), but they root their descendents in this objset using
77 * handles anyway, so that all access to dnodes from dbufs consistently
80 dnode_handle_t os_meta_dnode;
81 dnode_handle_t os_userused_dnode;
82 dnode_handle_t os_groupused_dnode;
85 /* can change, under dsl_dir's locks: */
89 uint8_t os_dedup_checksum;
90 uint8_t os_dedup_verify;
92 uint8_t os_primary_cache;
93 uint8_t os_secondary_cache;
97 struct dmu_tx *os_synctx; /* XXX sketchy */
99 zil_header_t os_zil_header;
100 list_t os_synced_dnodes;
103 /* Protected by os_obj_lock */
104 kmutex_t os_obj_lock;
105 uint64_t os_obj_next;
107 /* Protected by os_lock */
109 list_t os_dirty_dnodes[TXG_SIZE];
110 list_t os_free_dnodes[TXG_SIZE];
112 list_t os_downgraded_dbufs;
114 /* stuff we store for the user */
115 kmutex_t os_user_ptr_lock;
118 /* SA layout/attribute registration */
122 #define DMU_META_OBJSET 0
123 #define DMU_META_DNODE_OBJECT 0
124 #define DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0)
125 #define DMU_META_DNODE(os) ((os)->os_meta_dnode.dnh_dnode)
126 #define DMU_USERUSED_DNODE(os) ((os)->os_userused_dnode.dnh_dnode)
127 #define DMU_GROUPUSED_DNODE(os) ((os)->os_groupused_dnode.dnh_dnode)
129 #define DMU_OS_IS_L2CACHEABLE(os) \
130 ((os)->os_secondary_cache == ZFS_CACHE_ALL || \
131 (os)->os_secondary_cache == ZFS_CACHE_METADATA)
133 #define DMU_OS_IS_L2COMPRESSIBLE(os) (zfs_mdcomp_disable == B_FALSE)
135 /* called from zpl */
136 int dmu_objset_hold(const char *name, void *tag, objset_t **osp);
137 int dmu_objset_own(const char *name, dmu_objset_type_t type,
138 boolean_t readonly, void *tag, objset_t **osp);
139 void dmu_objset_rele(objset_t *os, void *tag);
140 void dmu_objset_disown(objset_t *os, void *tag);
141 int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp);
143 int dmu_objset_create(const char *name, dmu_objset_type_t type, uint64_t flags,
144 void (*func)(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx), void *arg);
145 int dmu_objset_clone(const char *name, struct dsl_dataset *clone_origin,
147 int dmu_objset_destroy(const char *name, boolean_t defer);
148 int dmu_objset_snapshot(char *fsname, char *snapname, char *tag,
149 struct nvlist *props, boolean_t recursive, boolean_t temporary, int fd);
150 void dmu_objset_stats(objset_t *os, nvlist_t *nv);
151 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat);
152 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
153 uint64_t *usedobjsp, uint64_t *availobjsp);
154 uint64_t dmu_objset_fsid_guid(objset_t *os);
155 int dmu_objset_find(char *name, int func(const char *, void *), void *arg,
157 int dmu_objset_find_spa(spa_t *spa, const char *name,
158 int func(spa_t *, uint64_t, const char *, void *), void *arg, int flags);
159 int dmu_objset_prefetch(const char *name, void *arg);
160 void dmu_objset_byteswap(void *buf, size_t size);
161 int dmu_objset_evict_dbufs(objset_t *os);
162 timestruc_t dmu_objset_snap_cmtime(objset_t *os);
164 /* called from dsl */
165 void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx);
166 boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg);
167 objset_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds,
168 blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx);
169 int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp,
171 void dmu_objset_evict(objset_t *os);
172 void dmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx);
173 void dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx);
174 boolean_t dmu_objset_userused_enabled(objset_t *os);
175 int dmu_objset_userspace_upgrade(objset_t *os);
176 boolean_t dmu_objset_userspace_present(objset_t *os);
178 void dmu_objset_init(void);
179 void dmu_objset_fini(void);
185 #endif /* _SYS_DMU_OBJSET_H */