1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
32 #define OCFS2_LVB_VERSION 5
34 struct ocfs2_meta_lvb
{
37 __be16 lvb_idynfeatures
;
41 __be64 lvb_iatime_packed
;
42 __be64 lvb_ictime_packed
;
43 __be64 lvb_imtime_packed
;
48 __be32 lvb_igeneration
;
52 #define OCFS2_QINFO_LVB_VERSION 1
54 struct ocfs2_qinfo_lvb
{
62 __be32 lvb_free_entry
;
65 #define OCFS2_ORPHAN_LVB_VERSION 1
67 struct ocfs2_orphan_scan_lvb
{
73 /* ocfs2_inode_lock_full() 'arg_flags' flags */
74 /* don't wait on recovery. */
75 #define OCFS2_META_LOCK_RECOVERY (0x01)
76 /* Instruct the dlm not to queue ourselves on the other node. */
77 #define OCFS2_META_LOCK_NOQUEUE (0x02)
78 /* don't block waiting for the downconvert thread, instead return -EAGAIN */
79 #define OCFS2_LOCK_NONBLOCK (0x04)
81 /* Locking subclasses of inode cluster lock */
90 int ocfs2_dlm_init(struct ocfs2_super
*osb
);
91 void ocfs2_dlm_shutdown(struct ocfs2_super
*osb
, int hangup_pending
);
92 void ocfs2_lock_res_init_once(struct ocfs2_lock_res
*res
);
93 void ocfs2_inode_lock_res_init(struct ocfs2_lock_res
*res
,
94 enum ocfs2_lock_type type
,
95 unsigned int generation
,
97 void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock
*dl
,
98 u64 parent
, struct inode
*inode
);
99 struct ocfs2_file_private
;
100 void ocfs2_file_lock_res_init(struct ocfs2_lock_res
*lockres
,
101 struct ocfs2_file_private
*fp
);
102 struct ocfs2_mem_dqinfo
;
103 void ocfs2_qinfo_lock_res_init(struct ocfs2_lock_res
*lockres
,
104 struct ocfs2_mem_dqinfo
*info
);
105 void ocfs2_refcount_lock_res_init(struct ocfs2_lock_res
*lockres
,
106 struct ocfs2_super
*osb
, u64 ref_blkno
,
107 unsigned int generation
);
108 void ocfs2_lock_res_free(struct ocfs2_lock_res
*res
);
109 int ocfs2_create_new_inode_locks(struct inode
*inode
);
110 int ocfs2_drop_inode_locks(struct inode
*inode
);
111 int ocfs2_rw_lock(struct inode
*inode
, int write
);
112 void ocfs2_rw_unlock(struct inode
*inode
, int write
);
113 int ocfs2_open_lock(struct inode
*inode
);
114 int ocfs2_try_open_lock(struct inode
*inode
, int write
);
115 void ocfs2_open_unlock(struct inode
*inode
);
116 int ocfs2_inode_lock_atime(struct inode
*inode
,
117 struct vfsmount
*vfsmnt
,
119 int ocfs2_inode_lock_full_nested(struct inode
*inode
,
120 struct buffer_head
**ret_bh
,
124 int ocfs2_inode_lock_with_page(struct inode
*inode
,
125 struct buffer_head
**ret_bh
,
128 /* Variants without special locking class or flags */
129 #define ocfs2_inode_lock_full(i, r, e, f)\
130 ocfs2_inode_lock_full_nested(i, r, e, f, OI_LS_NORMAL)
131 #define ocfs2_inode_lock_nested(i, b, e, s)\
132 ocfs2_inode_lock_full_nested(i, b, e, 0, s)
133 /* 99% of the time we don't want to supply any additional flags --
134 * those are for very specific cases only. */
135 #define ocfs2_inode_lock(i, b, e) ocfs2_inode_lock_full_nested(i, b, e, 0, OI_LS_NORMAL)
136 void ocfs2_inode_unlock(struct inode
*inode
,
138 int ocfs2_super_lock(struct ocfs2_super
*osb
,
140 void ocfs2_super_unlock(struct ocfs2_super
*osb
,
142 int ocfs2_orphan_scan_lock(struct ocfs2_super
*osb
, u32
*seqno
);
143 void ocfs2_orphan_scan_unlock(struct ocfs2_super
*osb
, u32 seqno
);
145 int ocfs2_rename_lock(struct ocfs2_super
*osb
);
146 void ocfs2_rename_unlock(struct ocfs2_super
*osb
);
147 int ocfs2_nfs_sync_lock(struct ocfs2_super
*osb
, int ex
);
148 void ocfs2_nfs_sync_unlock(struct ocfs2_super
*osb
, int ex
);
149 int ocfs2_dentry_lock(struct dentry
*dentry
, int ex
);
150 void ocfs2_dentry_unlock(struct dentry
*dentry
, int ex
);
151 int ocfs2_file_lock(struct file
*file
, int ex
, int trylock
);
152 void ocfs2_file_unlock(struct file
*file
);
153 int ocfs2_qinfo_lock(struct ocfs2_mem_dqinfo
*oinfo
, int ex
);
154 void ocfs2_qinfo_unlock(struct ocfs2_mem_dqinfo
*oinfo
, int ex
);
155 struct ocfs2_refcount_tree
;
156 int ocfs2_refcount_lock(struct ocfs2_refcount_tree
*ref_tree
, int ex
);
157 void ocfs2_refcount_unlock(struct ocfs2_refcount_tree
*ref_tree
, int ex
);
160 void ocfs2_mark_lockres_freeing(struct ocfs2_super
*osb
,
161 struct ocfs2_lock_res
*lockres
);
162 void ocfs2_simple_drop_lockres(struct ocfs2_super
*osb
,
163 struct ocfs2_lock_res
*lockres
);
165 /* for the downconvert thread */
166 void ocfs2_wake_downconvert_thread(struct ocfs2_super
*osb
);
168 struct ocfs2_dlm_debug
*ocfs2_new_dlm_debug(void);
169 void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug
*dlm_debug
);
171 /* To set the locking protocol on module initialization */
172 void ocfs2_set_locking_protocol(void);
173 #endif /* DLMGLUE_H */
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