/******************************************************************************
  *******************************************************************************
  **
  **  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