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