1/*-
 2 * SPDX-License-Identifier: BSD-3-Clause
 3 *
 4 * Copyright (c) 1988 University of Utah.
 5 * Copyright (c) 1990, 1993
 6 *	The Regents of the University of California.  All rights reserved.
 7 *
 8 * This code is derived from software contributed to Berkeley by
 9 * the Systems Programming Group of the University of Utah Computer
10 * Science Department.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: Utah $Hdr: fdioctl.h 1.1 90/07/09$
37 *
38 *	@(#)vnioctl.h	8.1 (Berkeley) 6/10/93
39 *
40 * From: src/sys/sys/vnioctl.h,v 1.4
41 */
42
43#ifndef _SYS_MDIOCTL_H_
44#define _SYS_MDIOCTL_H_
45
46enum md_types {MD_MALLOC, MD_PRELOAD, MD_VNODE, MD_SWAP, MD_NULL};
47
48/*
49 * Ioctl definitions for memory disk pseudo-device.
50 */
51
52#define MDNPAD		96
53struct md_ioctl {
54	unsigned	md_version;	/* Structure layout version */
55	unsigned	md_unit;	/* unit number */
56	enum md_types	md_type ;	/* type of disk */
57	char		*md_file;	/* pathname of file to mount */
58	off_t		md_mediasize;	/* size of disk in bytes */
59	unsigned	md_sectorsize;	/* sectorsize */
60	unsigned	md_options;	/* options */
61	u_int64_t	md_base;	/* base address */
62	int		md_fwheads;	/* firmware heads */
63	int		md_fwsectors;	/* firmware sectors */
64	char		*md_label;	/* label of the device */
65	int		md_pad[MDNPAD];	/* padding */
66};
67
68#define MD_NAME		"md"
69#define MDCTL_NAME	"mdctl"
70#define MDIOVERSION	0
71
72/*
73 * Before you can use a unit, it must be configured with MDIOCSET.
74 * The configuration persists across opens and closes of the device;
75 * an MDIOCCLR must be used to reset a configuration.  An attempt to
76 * MDIOCSET an already active unit will return EBUSY.
77 */
78
79#define MDIOCATTACH	_IOWR('m', 0, struct md_ioctl)	/* attach disk */
80#define MDIOCDETACH	_IOWR('m', 1, struct md_ioctl)	/* detach disk */
81#define MDIOCQUERY	_IOWR('m', 2, struct md_ioctl)	/* query status */
82#define MDIOCRESIZE	_IOWR('m', 4, struct md_ioctl)	/* resize disk */
83
84#define MD_CLUSTER	0x01	/* Don't cluster */
85#define MD_RESERVE	0x02	/* Pre-reserve swap */
86#define MD_AUTOUNIT	0x04	/* Assign next free unit */
87#define MD_READONLY	0x08	/* Readonly mode */
88#define MD_COMPRESS	0x10	/* Compression mode */
89#define MD_FORCE	0x20	/* Don't try to prevent foot-shooting */
90#define MD_ASYNC	0x40	/* Asynchronous mode */
91#define MD_VERIFY	0x80	/* Open file with O_VERIFY (vnode only) */
92#define	MD_CACHE	0x100	/* Cache vnode data */
93#define	MD_MUSTDEALLOC	0x200	/* BIO_DELETE only if dealloc is available */
94
95#endif	/* _SYS_MDIOCTL_H_*/