/* -*- linux-c -*- ------------------------------------------------------- *

 *   

 * linux/include/linux/auto_fs.h

 *

 *   Copyright 1997 Transmeta Corporation - All Rights Reserved

 *

 * This file is part of the Linux kernel and is made available under

 * the terms of the GNU General Public License, version 2, or at your

 * option, any later version, incorporated herein by reference.

 *

 * ----------------------------------------------------------------------- */

#ifndef _LINUX_AUTO_FS_H

#define _LINUX_AUTO_FS_H

#include <linux/types.h>

#ifndef __KERNEL__

#include <sys/ioctl.h>

#endif /* __KERNEL__ */

/* This file describes autofs v3 */

#define AUTOFS_PROTO_VERSION	3

/* Range of protocol versions defined */

#define AUTOFS_MAX_PROTO_VERSION	AUTOFS_PROTO_VERSION

#define AUTOFS_MIN_PROTO_VERSION	AUTOFS_PROTO_VERSION

/*

 * The wait_queue_token (autofs_wqt_t) is part of a structure which is passed

 * back to the kernel via ioctl from userspace. On architectures where 32- and

 * 64-bit userspace binaries can be executed it's important that the size of

 * autofs_wqt_t stays constant between 32- and 64-bit Linux kernels so that we

 * do not break the binary ABI interface by changing the structure size.

 */

#if defined(__ia64__) || defined(__alpha__) /* pure 64bit architectures */

typedef unsigned long autofs_wqt_t;

#else

typedef unsigned int autofs_wqt_t;

#endif

/* Packet types */

#define autofs_ptype_missing	0	/* Missing entry (mount request) */

#define autofs_ptype_expire	1	/* Expire entry (umount request) */

struct autofs_packet_hdr {

	int proto_version;		/* Protocol version */

	int type;			/* Type of packet */

};

/* v3 missing */

struct autofs_packet_missing {

	struct autofs_packet_hdr hdr;

        autofs_wqt_t wait_queue_token;

	int len;

	char name[NAME_MAX+1];

};	

/* v3 expire (via ioctl) */

struct autofs_packet_expire {

	struct autofs_packet_hdr hdr;

	int len;

	char name[NAME_MAX+1];

};

#define AUTOFS_IOC_READY      _IO(0x93,0x60)

#define AUTOFS_IOC_FAIL       _IO(0x93,0x61)

#define AUTOFS_IOC_CATATONIC  _IO(0x93,0x62)

#define AUTOFS_IOC_PROTOVER   _IOR(0x93,0x63,int)

#define AUTOFS_IOC_SETTIMEOUT32 _IOWR(0x93,0x64,compat_ulong_t)

#define AUTOFS_IOC_SETTIMEOUT _IOWR(0x93,0x64,unsigned long)

#define AUTOFS_IOC_EXPIRE     _IOR(0x93,0x65,struct autofs_packet_expire)

#endif /* _LINUX_AUTO_FS_H */