[unix-history] / usr / src / sys / dev / vnioctl.h

/*
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * the Systems Programming Group of the University of Utah Computer
 * Science Department.
 *
 * %sccs.include.redist.c%
 *
 * from: Utah $Hdr: fdioctl.h 1.1 90/07/09$
 *
 *	@(#)vnioctl.h	7.3 (Berkeley) %G%
 */

/*
 * Ioctl definitions for file (vnode) disk pseudo-device.
 */

#define FDISKFILE	"/etc/fdisks"	/* default config file */

struct vn_ioctl {
	char	*vn_file;	/* pathname of file to mount */
	int	vn_size;	/* (returned) size of disk */
};

/*
 * Before you can use a unit, it must be configured with VNIOCSET.
 * The configuration persists across opens and closes of the device;
 * an VNIOCCLR must be used to reset a configuration.  An attempt to
 * VNIOCSET an already active unit will return EBUSY.
 */
#define VNIOCSET	_IOWR('F', 0, struct vn_ioctl)	/* enable disk */
#define VNIOCCLR	_IOW('F', 1, struct vn_ioctl)	/* disable disk */
Commit	Line	Data
60f56dfc KM	1	/*
	2	* Copyright (c) 1988 University of Utah.
	3	* Copyright (c) 1990 The Regents of the University of California.
	4	* All rights reserved.
	5	*
	6	* This code is derived from software contributed to Berkeley by
	7	* the Systems Programming Group of the University of Utah Computer
	8	* Science Department.
	9	*
	10	* %sccs.include.redist.c%
	11	*
f7c89fbb	12	* from: Utah $Hdr: fdioctl.h 1.1 90/07/09$
60f56dfc	13	*
0c17d899	14	* @(#)vnioctl.h 7.3 (Berkeley) %G%
60f56dfc KM	15	*/
	16
	17	/*
	18	* Ioctl definitions for file (vnode) disk pseudo-device.
	19	*/
	20
	21	#define FDISKFILE "/etc/fdisks" /* default config file */
	22
0c17d899 MH	23	struct vn_ioctl {
	24	char vn_file; / pathname of file to mount */
	25	int vn_size; /* (returned) size of disk */
60f56dfc KM	26	};
	27
	28	/*
0c17d899	29	* Before you can use a unit, it must be configured with VNIOCSET.
60f56dfc	30	* The configuration persists across opens and closes of the device;
0c17d899 MH	31	* an VNIOCCLR must be used to reset a configuration. An attempt to
0c17d899 MH	32	* VNIOCSET an already active unit will return EBUSY.
60f56dfc	33	*/
0c17d899 MH	34	#define VNIOCSET _IOWR('F', 0, struct vn_ioctl) /* enable disk */
0c17d899 MH	35	#define VNIOCCLR _IOW('F', 1, struct vn_ioctl) /* disable disk */