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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 Fasheh15b1e362007-09-07 13:58:15 -070032#define OCFS2_LVB_VERSION 5
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;
Mark Fasheh15b1e362007-09-07 13:58:15 -070037 __be16 lvb_idynfeatures;
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
Mark Fashehe63aecb62007-10-18 15:30:42 -070052/* ocfs2_inode_lock_full() 'arg_flags' flags */
Mark Fashehccd979b2005-12-15 14:31:24 -080053/* 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)
Mark Fasheh34d024f2007-09-24 15:56:19 -070057/* don't block waiting for the downconvert thread, instead return -EAGAIN */
Mark Fashehccd979b2005-12-15 14:31:24 -080058#define OCFS2_LOCK_NONBLOCK (0x04)
59
60int ocfs2_dlm_init(struct ocfs2_super *osb);
Joel Becker286eaa92008-02-01 15:03:57 -080061void ocfs2_dlm_shutdown(struct ocfs2_super *osb, int hangup_pending);
Mark Fashehccd979b2005-12-15 14:31:24 -080062void 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 Fashehcf8e06f2007-12-20 16:43:10 -080069struct ocfs2_file_private;
70void ocfs2_file_lock_res_init(struct ocfs2_lock_res *lockres,
71 struct ocfs2_file_private *fp);
Mark Fashehccd979b2005-12-15 14:31:24 -080072void ocfs2_lock_res_free(struct ocfs2_lock_res *res);
73int ocfs2_create_new_inode_locks(struct inode *inode);
74int ocfs2_drop_inode_locks(struct inode *inode);
Mark Fashehccd979b2005-12-15 14:31:24 -080075int ocfs2_rw_lock(struct inode *inode, int write);
76void ocfs2_rw_unlock(struct inode *inode, int write);
Tiger Yang50008632007-03-20 16:01:38 -070077int ocfs2_open_lock(struct inode *inode);
78int ocfs2_try_open_lock(struct inode *inode, int write);
79void ocfs2_open_unlock(struct inode *inode);
Mark Fashehe63aecb62007-10-18 15:30:42 -070080int ocfs2_inode_lock_atime(struct inode *inode,
Tiger Yang7f1a37e2006-11-15 15:48:42 +080081 struct vfsmount *vfsmnt,
82 int *level);
Mark Fashehe63aecb62007-10-18 15:30:42 -070083int ocfs2_inode_lock_full(struct inode *inode,
Mark Fashehccd979b2005-12-15 14:31:24 -080084 struct buffer_head **ret_bh,
85 int ex,
86 int arg_flags);
Mark Fashehe63aecb62007-10-18 15:30:42 -070087int ocfs2_inode_lock_with_page(struct inode *inode,
Mark Fashehccd979b2005-12-15 14:31:24 -080088 struct buffer_head **ret_bh,
89 int ex,
90 struct page *page);
91/* 99% of the time we don't want to supply any additional flags --
92 * those are for very specific cases only. */
Mark Fashehe63aecb62007-10-18 15:30:42 -070093#define ocfs2_inode_lock(i, b, e) ocfs2_inode_lock_full(i, b, e, 0)
94void ocfs2_inode_unlock(struct inode *inode,
Mark Fashehccd979b2005-12-15 14:31:24 -080095 int ex);
96int ocfs2_super_lock(struct ocfs2_super *osb,
97 int ex);
98void ocfs2_super_unlock(struct ocfs2_super *osb,
99 int ex);
100int ocfs2_rename_lock(struct ocfs2_super *osb);
101void ocfs2_rename_unlock(struct ocfs2_super *osb);
Mark Fashehd680efe2006-09-08 14:14:34 -0700102int ocfs2_dentry_lock(struct dentry *dentry, int ex);
103void ocfs2_dentry_unlock(struct dentry *dentry, int ex);
Mark Fashehcf8e06f2007-12-20 16:43:10 -0800104int ocfs2_file_lock(struct file *file, int ex, int trylock);
105void ocfs2_file_unlock(struct file *file);
Mark Fashehd680efe2006-09-08 14:14:34 -0700106
Mark Fashehccd979b2005-12-15 14:31:24 -0800107void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres);
Mark Fashehd680efe2006-09-08 14:14:34 -0700108void ocfs2_simple_drop_lockres(struct ocfs2_super *osb,
109 struct ocfs2_lock_res *lockres);
Mark Fashehccd979b2005-12-15 14:31:24 -0800110
Mark Fasheh34d024f2007-09-24 15:56:19 -0700111/* for the downconvert thread */
Mark Fasheh34d024f2007-09-24 15:56:19 -0700112void ocfs2_wake_downconvert_thread(struct ocfs2_super *osb);
Mark Fashehccd979b2005-12-15 14:31:24 -0800113
114struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void);
115void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug);
116
Joel Becker63e0c482008-01-30 16:58:36 -0800117/* To set the locking protocol on module initialization */
118void ocfs2_set_locking_protocol(void);
Mark Fashehccd979b2005-12-15 14:31:24 -0800119#endif /* DLMGLUE_H */