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) 2012, 2015 by Delphix. All rights reserved.
24 * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
25 * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
26 * Copyright (c) 2014 Integros [integros.com]
29 /* Portions Copyright 2010 Robert Milkowski */
31 #ifndef _SYS_DMU_OBJSET_H
32 #define _SYS_DMU_OBJSET_H
37 #include <sys/zfs_context.h>
38 #include <sys/dnode.h>
47 extern krwlock_t os_lock;
53 #define OBJSET_PHYS_SIZE 2048
54 #define OBJSET_OLD_PHYS_SIZE 1024
56 #define OBJSET_BUF_HAS_USERUSED(buf) \
57 (arc_buf_size(buf) > OBJSET_OLD_PHYS_SIZE)
59 #define OBJSET_FLAG_USERACCOUNTING_COMPLETE (1ULL<<0)
61 typedef struct objset_phys {
62 dnode_phys_t os_meta_dnode;
63 zil_header_t os_zil_header;
66 char os_pad[OBJSET_PHYS_SIZE - sizeof (dnode_phys_t)*3 -
67 sizeof (zil_header_t) - sizeof (uint64_t)*2];
68 dnode_phys_t os_userused_dnode;
69 dnode_phys_t os_groupused_dnode;
74 struct dsl_dataset *os_dsl_dataset;
76 arc_buf_t *os_phys_buf;
77 objset_phys_t *os_phys;
79 * The following "special" dnodes have no parent, are exempt
80 * from dnode_move(), and are not recorded in os_dnodes, but they
81 * root their descendents in this objset using handles anyway, so
82 * that all access to dnodes from dbufs consistently uses handles.
84 dnode_handle_t os_meta_dnode;
85 dnode_handle_t os_userused_dnode;
86 dnode_handle_t os_groupused_dnode;
89 list_node_t os_evicting_node;
91 /* can change, under dsl_dir's locks: */
92 enum zio_checksum os_checksum;
93 enum zio_compress os_compress;
95 enum zio_checksum os_dedup_checksum;
96 boolean_t os_dedup_verify;
97 zfs_logbias_op_t os_logbias;
98 zfs_cache_type_t os_primary_cache;
99 zfs_cache_type_t os_secondary_cache;
100 zfs_sync_type_t os_sync;
101 zfs_redundant_metadata_type_t os_redundant_metadata;
105 * Pointer is constant; the blkptr it points to is protected by
106 * os_dsl_dataset->ds_bp_rwlock
110 /* no lock needed: */
111 struct dmu_tx *os_synctx; /* XXX sketchy */
112 zil_header_t os_zil_header;
113 list_t os_synced_dnodes;
116 /* Protected by os_obj_lock */
117 kmutex_t os_obj_lock;
118 uint64_t os_obj_next;
120 /* Protected by os_lock */
122 list_t os_dirty_dnodes[TXG_SIZE];
123 list_t os_free_dnodes[TXG_SIZE];
125 list_t os_downgraded_dbufs;
127 /* stuff we store for the user */
128 kmutex_t os_user_ptr_lock;
133 #define DMU_META_OBJSET 0
134 #define DMU_META_DNODE_OBJECT 0
135 #define DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0)
136 #define DMU_META_DNODE(os) ((os)->os_meta_dnode.dnh_dnode)
137 #define DMU_USERUSED_DNODE(os) ((os)->os_userused_dnode.dnh_dnode)
138 #define DMU_GROUPUSED_DNODE(os) ((os)->os_groupused_dnode.dnh_dnode)
140 #define DMU_OS_IS_L2CACHEABLE(os) \
141 ((os)->os_secondary_cache == ZFS_CACHE_ALL || \
142 (os)->os_secondary_cache == ZFS_CACHE_METADATA)
144 #define DMU_OS_IS_L2COMPRESSIBLE(os) (zfs_mdcomp_disable == B_FALSE)
146 /* called from zpl */
147 int dmu_objset_hold(const char *name, void *tag, objset_t **osp);
148 int dmu_objset_own(const char *name, dmu_objset_type_t type,
149 boolean_t readonly, void *tag, objset_t **osp);
150 int dmu_objset_own_obj(struct dsl_pool *dp, uint64_t obj,
151 dmu_objset_type_t type, boolean_t readonly, void *tag, objset_t **osp);
152 void dmu_objset_refresh_ownership(objset_t *os, void *tag);
153 void dmu_objset_rele(objset_t *os, void *tag);
154 void dmu_objset_disown(objset_t *os, void *tag);
155 int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp);
157 void dmu_objset_stats(objset_t *os, nvlist_t *nv);
158 void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat);
159 void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
160 uint64_t *usedobjsp, uint64_t *availobjsp);
161 uint64_t dmu_objset_fsid_guid(objset_t *os);
162 int dmu_objset_find_dp(struct dsl_pool *dp, uint64_t ddobj,
163 int func(struct dsl_pool *, struct dsl_dataset *, void *),
164 void *arg, int flags);
165 int dmu_objset_prefetch(const char *name, void *arg);
166 void dmu_objset_evict_dbufs(objset_t *os);
167 timestruc_t dmu_objset_snap_cmtime(objset_t *os);
169 /* called from dsl */
170 void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx);
171 boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg);
172 objset_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds,
173 blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx);
174 int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp,
176 void dmu_objset_evict(objset_t *os);
177 void dmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx);
178 void dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx);
179 boolean_t dmu_objset_userused_enabled(objset_t *os);
180 int dmu_objset_userspace_upgrade(objset_t *os);
181 boolean_t dmu_objset_userspace_present(objset_t *os);
182 int dmu_fsname(const char *snapname, char *buf);
184 void dmu_objset_evict_done(objset_t *os);
186 void dmu_objset_init(void);
187 void dmu_objset_fini(void);
193 #endif /* _SYS_DMU_OBJSET_H */