Release 4.7 include/uapi/linux/dlm_device.h

/******************************************************************************
*******************************************************************************
**
**  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 2

/* 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

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