/*

 * Copyright 2008 Red Hat, Inc. All rights reserved.

 * Copyright 2008 Ian Kent <raven@themaw.net>

 *

 * 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_DEV_IOCTL_H

#define _LINUX_AUTO_DEV_IOCTL_H

#include <linux/auto_fs.h>

#ifdef __KERNEL__

#include <linux/string.h>

#else

#include <string.h>

#endif /* __KERNEL__ */

#define AUTOFS_DEVICE_NAME		"autofs"

#define AUTOFS_DEV_IOCTL_VERSION_MAJOR	1

#define AUTOFS_DEV_IOCTL_VERSION_MINOR	0

#define AUTOFS_DEVID_LEN		16

#define AUTOFS_DEV_IOCTL_SIZE		sizeof(struct autofs_dev_ioctl)

/*

 * An ioctl interface for autofs mount point control.

 */

struct args_protover {

	__u32	version;

};

struct args_protosubver {

	__u32	sub_version;

};

struct args_openmount {

	__u32	devid;

};

struct args_ready {

	__u32	token;

};

struct args_fail {

	__u32	token;

	__s32	status;

};

struct args_setpipefd {

	__s32	pipefd;

};

struct args_timeout {

	__u64	timeout;

};

struct args_requester {

	__u32	uid;

	__u32	gid;

};

struct args_expire {

	__u32	how;

};

struct args_askumount {

	__u32	may_umount;

};

struct args_ismountpoint {

	union {

		struct args_in {

			__u32	type;

		} in;

		struct args_out {

			__u32	devid;

			__u32	magic;

		} out;

	};

};

/*

 * All the ioctls use this structure.

 * When sending a path size must account for the total length

 * of the chunk of memory otherwise is is the size of the

 * structure.

 */

struct autofs_dev_ioctl {

	__u32 ver_major;

	__u32 ver_minor;

	__u32 size;		/* total size of data passed in

				 * including this struct */

	__s32 ioctlfd;		/* automount command fd */

	/* Command parameters */

	union {

		struct args_protover		protover;

		struct args_protosubver		protosubver;

		struct args_openmount		openmount;

		struct args_ready		ready;

		struct args_fail		fail;

		struct args_setpipefd		setpipefd;

		struct args_timeout		timeout;

		struct args_requester		requester;

		struct args_expire		expire;

		struct args_askumount		askumount;

		struct args_ismountpoint	ismountpoint;

	};

	char path[0];

};

static inline void init_autofs_dev_ioctl(struct autofs_dev_ioctl *in)

{

	memset(in, 0, sizeof(struct autofs_dev_ioctl));

	in->ver_major = AUTOFS_DEV_IOCTL_VERSION_MAJOR;

	in->ver_minor = AUTOFS_DEV_IOCTL_VERSION_MINOR;

	in->size = sizeof(struct autofs_dev_ioctl);

	in->ioctlfd = -1;

	return;

}

/*

 * If you change this make sure you make the corresponding change

 * to autofs-dev-ioctl.c:lookup_ioctl()

 */

enum {

	/* Get various version info */

	AUTOFS_DEV_IOCTL_VERSION_CMD = 0x71,

	AUTOFS_DEV_IOCTL_PROTOVER_CMD,

	AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD,

	/* Open mount ioctl fd */

	AUTOFS_DEV_IOCTL_OPENMOUNT_CMD,

	/* Close mount ioctl fd */

	AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD,

	/* Mount/expire status returns */

	AUTOFS_DEV_IOCTL_READY_CMD,

	AUTOFS_DEV_IOCTL_FAIL_CMD,

	/* Activate/deactivate autofs mount */

	AUTOFS_DEV_IOCTL_SETPIPEFD_CMD,

	AUTOFS_DEV_IOCTL_CATATONIC_CMD,

	/* Expiry timeout */

	AUTOFS_DEV_IOCTL_TIMEOUT_CMD,

	/* Get mount last requesting uid and gid */

	AUTOFS_DEV_IOCTL_REQUESTER_CMD,

	/* Check for eligible expire candidates */

	AUTOFS_DEV_IOCTL_EXPIRE_CMD,

	/* Request busy status */

	AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD,

	/* Check if path is a mountpoint */

	AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD,

};

#define AUTOFS_IOCTL 0x93

#define AUTOFS_DEV_IOCTL_VERSION \

	_IOWR(AUTOFS_IOCTL, \

	      AUTOFS_DEV_IOCTL_VERSION_CMD, struct autofs_dev_ioctl)

#define AUTOFS_DEV_IOCTL_PROTOVER \

	_IOWR(AUTOFS_IOCTL, \

	      AUTOFS_DEV_IOCTL_PROTOVER_CMD, struct autofs_dev_ioctl)

#define AUTOFS_DEV_IOCTL_PROTOSUBVER \

	_IOWR(AUTOFS_IOCTL, \

	      AUTOFS_DEV_IOCTL_PROTOSUBVER_CMD, struct autofs_dev_ioctl)

#define AUTOFS_DEV_IOCTL_OPENMOUNT \

	_IOWR(AUTOFS_IOCTL, \

	      AUTOFS_DEV_IOCTL_OPENMOUNT_CMD, struct autofs_dev_ioctl)

#define AUTOFS_DEV_IOCTL_CLOSEMOUNT \

	_IOWR(AUTOFS_IOCTL, \

	      AUTOFS_DEV_IOCTL_CLOSEMOUNT_CMD, struct autofs_dev_ioctl)

#define AUTOFS_DEV_IOCTL_READY \

	_IOWR(AUTOFS_IOCTL, \

	      AUTOFS_DEV_IOCTL_READY_CMD, struct autofs_dev_ioctl)

#define AUTOFS_DEV_IOCTL_FAIL \

	_IOWR(AUTOFS_IOCTL, \

	      AUTOFS_DEV_IOCTL_FAIL_CMD, struct autofs_dev_ioctl)

#define AUTOFS_DEV_IOCTL_SETPIPEFD \

	_IOWR(AUTOFS_IOCTL, \

	      AUTOFS_DEV_IOCTL_SETPIPEFD_CMD, struct autofs_dev_ioctl)

#define AUTOFS_DEV_IOCTL_CATATONIC \

	_IOWR(AUTOFS_IOCTL, \

	      AUTOFS_DEV_IOCTL_CATATONIC_CMD, struct autofs_dev_ioctl)

#define AUTOFS_DEV_IOCTL_TIMEOUT \

	_IOWR(AUTOFS_IOCTL, \

	      AUTOFS_DEV_IOCTL_TIMEOUT_CMD, struct autofs_dev_ioctl)

#define AUTOFS_DEV_IOCTL_REQUESTER \

	_IOWR(AUTOFS_IOCTL, \

	      AUTOFS_DEV_IOCTL_REQUESTER_CMD, struct autofs_dev_ioctl)

#define AUTOFS_DEV_IOCTL_EXPIRE \

	_IOWR(AUTOFS_IOCTL, \

	      AUTOFS_DEV_IOCTL_EXPIRE_CMD, struct autofs_dev_ioctl)

#define AUTOFS_DEV_IOCTL_ASKUMOUNT \

	_IOWR(AUTOFS_IOCTL, \

	      AUTOFS_DEV_IOCTL_ASKUMOUNT_CMD, struct autofs_dev_ioctl)

#define AUTOFS_DEV_IOCTL_ISMOUNTPOINT \

	_IOWR(AUTOFS_IOCTL, \

	      AUTOFS_DEV_IOCTL_ISMOUNTPOINT_CMD, struct autofs_dev_ioctl)

#endif	/* _LINUX_AUTO_DEV_IOCTL_H */