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

*******************************************************************************

**

**  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.

**

*******************************************************************************

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

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

 * interface.

 */

#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 0

/* 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

/* Arbitrary length restriction */

#define MAX_LS_NAME_LEN 64

/* Lockspace flags */

#define DLM_USER_LSFLG_AUTOFREE   1

#define DLM_USER_LSFLG_FORCEFREE  2