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, 2014 by Delphix. All rights reserved.
24 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
25 */
26
27 /* Portions Copyright 2010 Robert Milkowski */
28
29 #ifndef _SYS_DMU_OBJSET_H
30 #define _SYS_DMU_OBJSET_H
31
32 #include <sys/spa.h>
33 #include <sys/arc.h>
34 #include <sys/txg.h>
35 #include <sys/zfs_context.h>
36 #include <sys/dnode.h>
37 #include <sys/zio.h>
38 #include <sys/zil.h>
39 #include <sys/sa.h>
40
41 #ifdef __cplusplus
42 extern "C" {
43 #endif
44
45 extern krwlock_t os_lock;
46
47 struct dsl_pool;
48 struct dsl_dataset;
49 struct dmu_tx;
50
51 #define OBJSET_PHYS_SIZE 2048
52 #define OBJSET_OLD_PHYS_SIZE 1024
53
54 #define OBJSET_BUF_HAS_USERUSED(buf) \
55 (arc_buf_size(buf) > OBJSET_OLD_PHYS_SIZE)
56
57 #define OBJSET_FLAG_USERACCOUNTING_COMPLETE (1ULL<<0)
58
59 typedef struct objset_phys {
60 dnode_phys_t os_meta_dnode;
61 zil_header_t os_zil_header;
62 uint64_t os_type;
63 uint64_t os_flags;
64 char os_pad[OBJSET_PHYS_SIZE - sizeof (dnode_phys_t)*3 -
65 sizeof (zil_header_t) - sizeof (uint64_t)*2];
66 dnode_phys_t os_userused_dnode;
67 dnode_phys_t os_groupused_dnode;
68 } objset_phys_t;
69
70 struct objset {
71 /* Immutable: */
72 struct dsl_dataset *os_dsl_dataset;
73 spa_t *os_spa;
74 arc_buf_t *os_phys_buf;
75 objset_phys_t *os_phys;
76 /*
77 * The following "special" dnodes have no parent and are exempt from
78 * dnode_move(), but they root their descendents in this objset using
79 * handles anyway, so that all access to dnodes from dbufs consistently
80 * uses handles.
81 */
82 dnode_handle_t os_meta_dnode;
83 dnode_handle_t os_userused_dnode;
84 dnode_handle_t os_groupused_dnode;
85 zilog_t *os_zil;
86
87 /* can change, under dsl_dir's locks: */
88 enum zio_checksum os_checksum;
89 enum zio_compress os_compress;
90 uint8_t os_copies;
91 enum zio_checksum os_dedup_checksum;
92 boolean_t os_dedup_verify;
93 zfs_logbias_op_t os_logbias;
94 zfs_cache_type_t os_primary_cache;
95 zfs_cache_type_t os_secondary_cache;
96 zfs_sync_type_t os_sync;
97 zfs_redundant_metadata_type_t os_redundant_metadata;
98
99 /* no lock needed: */
100 struct dmu_tx *os_synctx; /* XXX sketchy */
101 blkptr_t *os_rootbp;
102 zil_header_t os_zil_header;
103 list_t os_synced_dnodes;
104 uint64_t os_flags;
105
106 /* Protected by os_obj_lock */
107 kmutex_t os_obj_lock;
108 uint64_t os_obj_next;
109
110 /* Protected by os_lock */
111 kmutex_t os_lock;
112 list_t os_dirty_dnodes[TXG_SIZE];
113 list_t os_free_dnodes[TXG_SIZE];
114 list_t os_dnodes;
115 list_t os_downgraded_dbufs;
116
117 /* stuff we store for the user */
118 kmutex_t os_user_ptr_lock;
119 void *os_user_ptr;
120 sa_os_t *os_sa;
121 };
122
123 #define DMU_META_OBJSET 0
124 #define DMU_META_DNODE_OBJECT 0
125 #define DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0)
126 #define DMU_META_DNODE(os) ((os)->os_meta_dnode.dnh_dnode)
127 #define DMU_USERUSED_DNODE(os) ((os)->os_userused_dnode.dnh_dnode)
128 #define DMU_GROUPUSED_DNODE(os) ((os)->os_groupused_dnode.dnh_dnode)
129
130 #define DMU_OS_IS_L2CACHEABLE(os) \
131 ((os)->os_secondary_cache == ZFS_CACHE_ALL || \
132 (os)->os_secondary_cache == ZFS_CACHE_METADATA)
133
134 #define DMU_OS_IS_L2COMPRESSIBLE(os) (zfs_mdcomp_disable == B_FALSE)
135
136 /* called from zpl */
137 int dmu_objset_hold(const char *name, void *tag, objset_t **osp);
138 int dmu_objset_own(const char *name, dmu_objset_type_t type,
139 boolean_t readonly, void *tag, objset_t **osp);
140 void dmu_objset_refresh_ownership(objset_t *os, void *tag);
141 void dmu_objset_rele(objset_t *os, void *tag);
142 void dmu_objset_disown(objset_t *os, void *tag);
143 int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp);
144
145 void dmu_objset_stats(objset_t *os, nvlist_t *nv);
146 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat);
147 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
148 uint64_t *usedobjsp, uint64_t *availobjsp);
149 uint64_t dmu_objset_fsid_guid(objset_t *os);
150 int dmu_objset_find_dp(struct dsl_pool *dp, uint64_t ddobj,
151 int func(struct dsl_pool *, struct dsl_dataset *, void *),
152 void *arg, int flags);
153 int dmu_objset_prefetch(const char *name, void *arg);
154 void dmu_objset_evict_dbufs(objset_t *os);
155 timestruc_t dmu_objset_snap_cmtime(objset_t *os);
156
157 /* called from dsl */
158 void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx);
159 boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg);
160 objset_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds,
161 blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx);
162 int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp,
163 objset_t **osp);
164 void dmu_objset_evict(objset_t *os);
165 void dmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx);
166 void dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx);
167 boolean_t dmu_objset_userused_enabled(objset_t *os);
168 int dmu_objset_userspace_upgrade(objset_t *os);
169 boolean_t dmu_objset_userspace_present(objset_t *os);
170 int dmu_fsname(const char *snapname, char *buf);
171
172 void dmu_objset_init(void);
173 void dmu_objset_fini(void);
174
175 #ifdef __cplusplus
176 }
177 #endif
178
179 #endif /* _SYS_DMU_OBJSET_H */