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Mark Fashehccd979b2005-12-15 14:31:24 -08001/* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * dlmglue.h
5 *
6 * description here
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
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.
14 *
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.
19 *
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.
24 */
25
26
27#ifndef DLMGLUE_H
28#define DLMGLUE_H
29
Mark Fashehd680efe2006-09-08 14:14:34 -070030#include "dcache.h"
31
Mark Fashehf9e2d822006-09-12 15:35:49 -070032#define OCFS2_LVB_VERSION 4
Mark Fashehccd979b2005-12-15 14:31:24 -080033
34struct ocfs2_meta_lvb {
Mark Fasheh4d3b83f2006-09-12 15:22:18 -070035 __u8 lvb_version;
Mark Fasheh24c19ef2006-09-22 17:28:19 -070036 __u8 lvb_reserved0;
37 __be16 lvb_reserved1;
Mark Fashehccd979b2005-12-15 14:31:24 -080038 __be32 lvb_iclusters;
39 __be32 lvb_iuid;
40 __be32 lvb_igid;
41 __be64 lvb_iatime_packed;
42 __be64 lvb_ictime_packed;
43 __be64 lvb_imtime_packed;
44 __be64 lvb_isize;
45 __be16 lvb_imode;
46 __be16 lvb_inlink;
Herbert Poetzlca4d1472006-07-03 17:27:12 -070047 __be32 lvb_iattr;
Mark Fashehf9e2d822006-09-12 15:35:49 -070048 __be32 lvb_igeneration;
49 __be32 lvb_reserved2;
Mark Fashehccd979b2005-12-15 14:31:24 -080050};
51
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)
59
60int ocfs2_dlm_init(struct ocfs2_super *osb);
61void ocfs2_dlm_shutdown(struct ocfs2_super *osb);
62void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res);
63void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res,
64 enum ocfs2_lock_type type,
Mark Fasheh24c19ef2006-09-22 17:28:19 -070065 unsigned int generation,
Mark Fashehccd979b2005-12-15 14:31:24 -080066 struct inode *inode);
Mark Fashehd680efe2006-09-08 14:14:34 -070067void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl,
68 u64 parent, struct inode *inode);
Mark Fashehccd979b2005-12-15 14:31:24 -080069void ocfs2_lock_res_free(struct ocfs2_lock_res *res);
70int ocfs2_create_new_inode_locks(struct inode *inode);
71int ocfs2_drop_inode_locks(struct inode *inode);
72int ocfs2_data_lock_full(struct inode *inode,
73 int write,
74 int arg_flags);
75#define ocfs2_data_lock(inode, write) ocfs2_data_lock_full(inode, write, 0)
76int ocfs2_data_lock_with_page(struct inode *inode,
77 int write,
78 struct page *page);
79void ocfs2_data_unlock(struct inode *inode,
80 int write);
81int ocfs2_rw_lock(struct inode *inode, int write);
82void ocfs2_rw_unlock(struct inode *inode, int write);
Tiger Yang7f1a37e2006-11-15 15:48:42 +080083int ocfs2_meta_lock_atime(struct inode *inode,
84 struct vfsmount *vfsmnt,
85 int *level);
Mark Fashehccd979b2005-12-15 14:31:24 -080086int ocfs2_meta_lock_full(struct inode *inode,
Mark Fashehccd979b2005-12-15 14:31:24 -080087 struct buffer_head **ret_bh,
88 int ex,
89 int arg_flags);
90int ocfs2_meta_lock_with_page(struct inode *inode,
Mark Fashehccd979b2005-12-15 14:31:24 -080091 struct buffer_head **ret_bh,
92 int ex,
93 struct page *page);
94/* 99% of the time we don't want to supply any additional flags --
95 * those are for very specific cases only. */
Mark Fasheh4bcec182006-10-09 16:02:40 -070096#define ocfs2_meta_lock(i, b, e) ocfs2_meta_lock_full(i, b, e, 0)
Mark Fashehccd979b2005-12-15 14:31:24 -080097void ocfs2_meta_unlock(struct inode *inode,
98 int ex);
99int ocfs2_super_lock(struct ocfs2_super *osb,
100 int ex);
101void ocfs2_super_unlock(struct ocfs2_super *osb,
102 int ex);
103int ocfs2_rename_lock(struct ocfs2_super *osb);
104void ocfs2_rename_unlock(struct ocfs2_super *osb);
Mark Fashehd680efe2006-09-08 14:14:34 -0700105int ocfs2_dentry_lock(struct dentry *dentry, int ex);
106void ocfs2_dentry_unlock(struct dentry *dentry, int ex);
107
Mark Fashehccd979b2005-12-15 14:31:24 -0800108void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres);
Mark Fashehd680efe2006-09-08 14:14:34 -0700109void ocfs2_simple_drop_lockres(struct ocfs2_super *osb,
110 struct ocfs2_lock_res *lockres);
Mark Fashehccd979b2005-12-15 14:31:24 -0800111
112/* for the vote thread */
113void ocfs2_process_blocked_lock(struct ocfs2_super *osb,
114 struct ocfs2_lock_res *lockres);
115
116struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void);
117void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug);
118
119/* aids in debugging and tracking lvbs */
120void ocfs2_dump_meta_lvb_info(u64 level,
121 const char *function,
122 unsigned int line,
123 struct ocfs2_lock_res *lockres);
124#define mlog_meta_lvb(__level, __lockres) ocfs2_dump_meta_lvb_info(__level, __PRETTY_FUNCTION__, __LINE__, __lockres)
125
126#endif /* DLMGLUE_H */