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 4
34 struct ocfs2_meta_lvb {
41 __be64 lvb_iatime_packed;
42 __be64 lvb_ictime_packed;
43 __be64 lvb_imtime_packed;
48 __be32 lvb_igeneration;
52 /* ocfs2_meta_lock_full() and ocfs2_data_lock_full() 'arg_flags' flags */
53 /* don't wait on recovery. */
54 #define OCFS2_META_LOCK_RECOVERY (0x01)
55 /* Instruct the dlm not to queue ourselves on the other node. */
56 #define OCFS2_META_LOCK_NOQUEUE (0x02)
57 /* don't block waiting for the vote thread, instead return -EAGAIN */
58 #define OCFS2_LOCK_NONBLOCK (0x04)
60 int ocfs2_dlm_init(struct ocfs2_super *osb);
61 void ocfs2_dlm_shutdown(struct ocfs2_super *osb);
62 void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res);
63 void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res,
64 enum ocfs2_lock_type type,
65 unsigned int generation,
67 void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl,
68 u64 parent, struct inode *inode);
69 void ocfs2_lock_res_free(struct ocfs2_lock_res *res);
70 int ocfs2_create_new_inode_locks(struct inode *inode);
71 int ocfs2_drop_inode_locks(struct inode *inode);
72 int ocfs2_data_lock_full(struct inode *inode,
75 #define ocfs2_data_lock(inode, write) ocfs2_data_lock_full(inode, write, 0)
76 int ocfs2_data_lock_with_page(struct inode *inode,
79 void ocfs2_data_unlock(struct inode *inode,
81 int ocfs2_rw_lock(struct inode *inode, int write);
82 void ocfs2_rw_unlock(struct inode *inode, int write);
83 int ocfs2_open_lock(struct inode *inode);
84 int ocfs2_try_open_lock(struct inode *inode, int write);
85 void ocfs2_open_unlock(struct inode *inode);
86 int ocfs2_meta_lock_atime(struct inode *inode,
87 struct vfsmount *vfsmnt,
89 int ocfs2_meta_lock_full(struct inode *inode,
90 struct buffer_head **ret_bh,
93 int ocfs2_meta_lock_with_page(struct inode *inode,
94 struct buffer_head **ret_bh,
97 /* 99% of the time we don't want to supply any additional flags --
98 * those are for very specific cases only. */
99 #define ocfs2_meta_lock(i, b, e) ocfs2_meta_lock_full(i, b, e, 0)
100 void ocfs2_meta_unlock(struct inode *inode,
102 int ocfs2_super_lock(struct ocfs2_super *osb,
104 void ocfs2_super_unlock(struct ocfs2_super *osb,
106 int ocfs2_rename_lock(struct ocfs2_super *osb);
107 void ocfs2_rename_unlock(struct ocfs2_super *osb);
108 int ocfs2_dentry_lock(struct dentry *dentry, int ex);
109 void ocfs2_dentry_unlock(struct dentry *dentry, int ex);
111 void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres);
112 void ocfs2_simple_drop_lockres(struct ocfs2_super *osb,
113 struct ocfs2_lock_res *lockres);
115 /* for the vote thread */
116 void ocfs2_process_blocked_lock(struct ocfs2_super *osb,
117 struct ocfs2_lock_res *lockres);
119 struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void);
120 void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug);
122 /* aids in debugging and tracking lvbs */
123 void ocfs2_dump_meta_lvb_info(u64 level,
124 const char *function,
126 struct ocfs2_lock_res *lockres);
127 #define mlog_meta_lvb(__level, __lockres) ocfs2_dump_meta_lvb_info(__level, __PRETTY_FUNCTION__, __LINE__, __lockres)
129 #endif /* DLMGLUE_H */