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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2012 by Delphix. All rights reserved.
24 */
25
26 /* Portions Copyright 2010 Robert Milkowski */
27
28 #ifndef _SYS_DMU_OBJSET_H
29 #define _SYS_DMU_OBJSET_H
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 #include <sys/sa.h>
39
40 #ifdef __cplusplus
41 extern "C" {
42 #endif
43
44 extern krwlock_t os_lock;
45
46 struct dsl_dataset;
47 struct dmu_tx;
48
49 #define OBJSET_PHYS_SIZE 2048
50 #define OBJSET_OLD_PHYS_SIZE 1024
51
52 #define OBJSET_BUF_HAS_USERUSED(buf) \
53 (arc_buf_size(buf) > OBJSET_OLD_PHYS_SIZE)
54
55 #define OBJSET_FLAG_USERACCOUNTING_COMPLETE (1ULL<<0)
56
57 typedef struct objset_phys {
58 dnode_phys_t os_meta_dnode;
59 zil_header_t os_zil_header;
60 uint64_t os_type;
61 uint64_t os_flags;
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;
66 } objset_phys_t;
67
68 struct objset {
69 /* Immutable: */
70 struct dsl_dataset *os_dsl_dataset;
71 spa_t *os_spa;
72 arc_buf_t *os_phys_buf;
73 objset_phys_t *os_phys;
74 /*
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
78 * uses handles.
79 */
80 dnode_handle_t os_meta_dnode;
81 dnode_handle_t os_userused_dnode;
82 dnode_handle_t os_groupused_dnode;
83 zilog_t *os_zil;
84
85 /* can change, under dsl_dir's locks: */
86 uint8_t os_checksum;
87 uint8_t os_compress;
88 uint8_t os_copies;
89 uint8_t os_dedup_checksum;
90 uint8_t os_dedup_verify;
91 uint8_t os_logbias;
92 uint8_t os_primary_cache;
93 uint8_t os_secondary_cache;
94 uint8_t os_sync;
95
96 /* no lock needed: */
97 struct dmu_tx *os_synctx; /* XXX sketchy */
98 blkptr_t *os_rootbp;
99 zil_header_t os_zil_header;
100 list_t os_synced_dnodes;
101 uint64_t os_flags;
102
103 /* Protected by os_obj_lock */
104 kmutex_t os_obj_lock;
105 uint64_t os_obj_next;
106
107 /* Protected by os_lock */
108 kmutex_t os_lock;
109 list_t os_dirty_dnodes[TXG_SIZE];
110 list_t os_free_dnodes[TXG_SIZE];
111 list_t os_dnodes;
112 list_t os_downgraded_dbufs;
113
114 /* stuff we store for the user */
115 kmutex_t os_user_ptr_lock;
116 void *os_user_ptr;
117
118 /* SA layout/attribute registration */
119 sa_os_t *os_sa;
120 };
121
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)
128
129 #define DMU_OS_IS_L2CACHEABLE(os) \
130 ((os)->os_secondary_cache == ZFS_CACHE_ALL || \
131 (os)->os_secondary_cache == ZFS_CACHE_METADATA)
132
133 /* called from zpl */
134 int dmu_objset_hold(const char *name, void *tag, objset_t **osp);
135 int dmu_objset_own(const char *name, dmu_objset_type_t type,
136 boolean_t readonly, void *tag, objset_t **osp);
137 void dmu_objset_rele(objset_t *os, void *tag);
138 void dmu_objset_disown(objset_t *os, void *tag);
139 int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp);
140
141 void dmu_objset_stats(objset_t *os, nvlist_t *nv);
142 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat);
143 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
144 uint64_t *usedobjsp, uint64_t *availobjsp);
145 uint64_t dmu_objset_fsid_guid(objset_t *os);
146 int dmu_objset_find_spa(spa_t *spa, const char *name,
147 int func(spa_t *, uint64_t, const char *, void *), void *arg, int flags);
148 int dmu_objset_prefetch(const char *name, void *arg);
149 int dmu_objset_evict_dbufs(objset_t *os);
150 timestruc_t dmu_objset_snap_cmtime(objset_t *os);
151
152 /* called from dsl */
153 void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx);
154 boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg);
155 boolean_t dmu_objset_is_dirty_anywhere(objset_t *os);
156 objset_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds,
157 blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx);
158 int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp,
159 objset_t **osp);
160 void dmu_objset_evict(objset_t *os);
161 void dmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx);
162 void dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx);
163 boolean_t dmu_objset_userused_enabled(objset_t *os);
164 int dmu_objset_userspace_upgrade(objset_t *os);
165 boolean_t dmu_objset_userspace_present(objset_t *os);
166
167 void dmu_objset_init(void);
168 void dmu_objset_fini(void);
169
170 #ifdef __cplusplus
171 }
172 #endif
173
174 #endif /* _SYS_DMU_OBJSET_H */