Release 4.7 include/linux/auto_dev-ioctl.h

/*
 * 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>
#include <linux/string.h>


#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;
}

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/*
 * 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 */
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Directory: include/linux

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