net: Avoid extra wakeups of threads blocked in wait_for_packet()
[linux-2.6.git] / include / linux / dlm_plock.h
1 /*
2  * Copyright (C) 2005-2008 Red Hat, Inc.  All rights reserved.
3  *
4  * This copyrighted material is made available to anyone wishing to use,
5  * modify, copy, or redistribute it subject to the terms and conditions
6  * of the GNU General Public License v.2.
7  */
8
9 #ifndef __DLM_PLOCK_DOT_H__
10 #define __DLM_PLOCK_DOT_H__
11
12 #include <linux/types.h>
13
14 #define DLM_PLOCK_MISC_NAME             "dlm_plock"
15
16 #define DLM_PLOCK_VERSION_MAJOR 1
17 #define DLM_PLOCK_VERSION_MINOR 1
18 #define DLM_PLOCK_VERSION_PATCH 0
19
20 enum {
21         DLM_PLOCK_OP_LOCK = 1,
22         DLM_PLOCK_OP_UNLOCK,
23         DLM_PLOCK_OP_GET,
24 };
25
26 struct dlm_plock_info {
27         __u32 version[3];
28         __u8 optype;
29         __u8 ex;
30         __u8 wait;
31         __u8 pad;
32         __u32 pid;
33         __s32 nodeid;
34         __s32 rv;
35         __u32 fsid;
36         __u64 number;
37         __u64 start;
38         __u64 end;
39         __u64 owner;
40 };
41
42 #ifdef __KERNEL__
43 int dlm_posix_lock(dlm_lockspace_t *lockspace, u64 number, struct file *file,
44                 int cmd, struct file_lock *fl);
45 int dlm_posix_unlock(dlm_lockspace_t *lockspace, u64 number, struct file *file,
46                 struct file_lock *fl);
47 int dlm_posix_get(dlm_lockspace_t *lockspace, u64 number, struct file *file,
48                 struct file_lock *fl);
49 #endif /* __KERNEL__ */
50
51 #endif
52