/* -*- c -*-

 * linux/include/linux/auto_fs4.h

 *

 * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org>

 *

 * 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_FS4_H

#define _LINUX_AUTO_FS4_H

/* Include common v3 definitions */

#include <linux/types.h>

#include <linux/auto_fs.h>

/* autofs v4 definitions */

#undef AUTOFS_PROTO_VERSION

#undef AUTOFS_MIN_PROTO_VERSION

#undef AUTOFS_MAX_PROTO_VERSION

#define AUTOFS_PROTO_VERSION		5

#define AUTOFS_MIN_PROTO_VERSION	3

#define AUTOFS_MAX_PROTO_VERSION	5

#define AUTOFS_PROTO_SUBVERSION		2

/* Mask for expire behaviour */

#define AUTOFS_EXP_IMMEDIATE		1

#define AUTOFS_EXP_LEAVES		2

#define AUTOFS_TYPE_ANY			0U

#define AUTOFS_TYPE_INDIRECT		1U

#define AUTOFS_TYPE_DIRECT		2U

#define AUTOFS_TYPE_OFFSET		4U

static inline void set_autofs_type_indirect(unsigned int *type)

{

	*type = AUTOFS_TYPE_INDIRECT;

	return;

}

static inline unsigned int autofs_type_indirect(unsigned int type)

{

	return (type == AUTOFS_TYPE_INDIRECT);

}

static inline void set_autofs_type_direct(unsigned int *type)

{

	*type = AUTOFS_TYPE_DIRECT;

	return;

}

static inline unsigned int autofs_type_direct(unsigned int type)

{

	return (type == AUTOFS_TYPE_DIRECT);

}

static inline void set_autofs_type_offset(unsigned int *type)

{

	*type = AUTOFS_TYPE_OFFSET;

	return;

}

static inline unsigned int autofs_type_offset(unsigned int type)

{

	return (type == AUTOFS_TYPE_OFFSET);

}

static inline unsigned int autofs_type_trigger(unsigned int type)

{

	return (type == AUTOFS_TYPE_DIRECT || type == AUTOFS_TYPE_OFFSET);

}

/*

 * This isn't really a type as we use it to say "no type set" to

 * indicate we want to search for "any" mount in the

 * autofs_dev_ioctl_ismountpoint() device ioctl function.

 */

static inline void set_autofs_type_any(unsigned int *type)

{

	*type = AUTOFS_TYPE_ANY;

	return;

}

static inline unsigned int autofs_type_any(unsigned int type)

{

	return (type == AUTOFS_TYPE_ANY);

}

/* Daemon notification packet types */

enum autofs_notify {

	NFY_NONE,

	NFY_MOUNT,

	NFY_EXPIRE

};

/* Kernel protocol version 4 packet types */

/* Expire entry (umount request) */

#define autofs_ptype_expire_multi	2

/* Kernel protocol version 5 packet types */

/* Indirect mount missing and expire requests. */

#define autofs_ptype_missing_indirect	3

#define autofs_ptype_expire_indirect	4

/* Direct mount missing and expire requests */

#define autofs_ptype_missing_direct	5

#define autofs_ptype_expire_direct	6

/* v4 multi expire (via pipe) */

struct autofs_packet_expire_multi {

	struct autofs_packet_hdr hdr;

        autofs_wqt_t wait_queue_token;

	int len;

	char name[NAME_MAX+1];

};

union autofs_packet_union {

	struct autofs_packet_hdr hdr;

	struct autofs_packet_missing missing;

	struct autofs_packet_expire expire;

	struct autofs_packet_expire_multi expire_multi;

};

/* autofs v5 common packet struct */

struct autofs_v5_packet {

	struct autofs_packet_hdr hdr;

	autofs_wqt_t wait_queue_token;

	__u32 dev;

	__u64 ino;

	__u32 uid;

	__u32 gid;

	__u32 pid;

	__u32 tgid;

	__u32 len;

	char name[NAME_MAX+1];

};

typedef struct autofs_v5_packet autofs_packet_missing_indirect_t;

typedef struct autofs_v5_packet autofs_packet_expire_indirect_t;

typedef struct autofs_v5_packet autofs_packet_missing_direct_t;

typedef struct autofs_v5_packet autofs_packet_expire_direct_t;

union autofs_v5_packet_union {

	struct autofs_packet_hdr hdr;

	struct autofs_v5_packet v5_packet;

	autofs_packet_missing_indirect_t missing_indirect;

	autofs_packet_expire_indirect_t expire_indirect;

	autofs_packet_missing_direct_t missing_direct;

	autofs_packet_expire_direct_t expire_direct;

};

#define AUTOFS_IOC_EXPIRE_MULTI		_IOW(0x93,0x66,int)

#define AUTOFS_IOC_EXPIRE_INDIRECT	AUTOFS_IOC_EXPIRE_MULTI

#define AUTOFS_IOC_EXPIRE_DIRECT	AUTOFS_IOC_EXPIRE_MULTI

#define AUTOFS_IOC_PROTOSUBVER		_IOR(0x93,0x67,int)

#define AUTOFS_IOC_ASKUMOUNT		_IOR(0x93,0x70,int)

#endif /* _LINUX_AUTO_FS4_H */