/******************************************************************************
*******************************************************************************
**
** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
** Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
**
** This copyrighted material is made available to anyone wishing to use,
** modify, copy, or redistribute it subject to the terms and conditions
** of the GNU General Public License v.2.
**
*******************************************************************************
******************************************************************************/

#ifndef _LINUX_DLM_DEVICE_H
#define _LINUX_DLM_DEVICE_H

/* This is the device interface for dlm, most users will use a library
* interface.
*/

#include <linux/dlm.h>
#include <linux/types.h>

#define DLM_USER_LVB_LEN 32

/* Version of the device interface */
#define DLM_DEVICE_VERSION_MAJOR 6
#define DLM_DEVICE_VERSION_MINOR 0
#define DLM_DEVICE_VERSION_PATCH 1

/* struct passed to the lock write */
struct dlm_lock_params {
__u8 mode;
__u8 namelen;
__u16 unused;
__u32 flags;
__u32 lkid;
__u32 parent;
__u64 xid;
__u64 timeout;
void __user *castparam;
void __user *castaddr;
void __user *bastparam;
void __user *bastaddr;
struct dlm_lksb __user *lksb;
char lvb[DLM_USER_LVB_LEN];
char name[0];
};

struct dlm_lspace_params {
__u32 flags;
__u32 minor;
char name[0];
};

struct dlm_purge_params {
__u32 nodeid;
__u32 pid;
};

struct dlm_write_request {
__u32 version[3];
__u8 cmd;
__u8 is64bit;
__u8 unused[2];

union {
struct dlm_lock_params lock;
struct dlm_lspace_params lspace;
struct dlm_purge_params purge;
} i;
};

struct dlm_device_version {
__u32 version[3];
};

/* struct read from the "device" fd,
consists mainly of userspace pointers for the library to use */

struct dlm_lock_result {
__u32 version[3];
__u32 length;
void __user * user_astaddr;
void __user * user_astparam;
struct dlm_lksb __user * user_lksb;
struct dlm_lksb lksb;
__u8 bast_mode;
__u8 unused[3];
/* Offsets may be zero if no data is present */
__u32 lvb_offset;
};

/* Commands passed to the device */
#define DLM_USER_LOCK 1
#define DLM_USER_UNLOCK 2
#define DLM_USER_QUERY 3
#define DLM_USER_CREATE_LOCKSPACE 4
#define DLM_USER_REMOVE_LOCKSPACE 5
#define DLM_USER_PURGE 6
#define DLM_USER_DEADLOCK 7

/* Lockspace flags */
#define DLM_USER_LSFLG_AUTOFREE 1
#define DLM_USER_LSFLG_FORCEFREE 2

#endif