mdioctl.h revision 330897 
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 * 4. 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 * $FreeBSD: stable/11/sys/sys/mdioctl.h 330897 2018-03-14 03:19:51Z eadler $
43 */
44
45#ifndef _SYS_MDIOCTL_H_
46#define _SYS_MDIOCTL_H_
47
48enum md_types {MD_MALLOC, MD_PRELOAD, MD_VNODE, MD_SWAP, MD_NULL};
49
50/*
51 * Ioctl definitions for memory disk pseudo-device.
52 */
53
54#define MDNPAD		97
55struct md_ioctl {
56	unsigned	md_version;	/* Structure layout version */
57	unsigned	md_unit;	/* unit number */
58	enum md_types	md_type ;	/* type of disk */
59	char		*md_file;	/* pathname of file to mount */
60	off_t		md_mediasize;	/* size of disk in bytes */
61	unsigned	md_sectorsize;	/* sectorsize */
62	unsigned	md_options;	/* options */
63	u_int64_t	md_base;	/* base address */
64	int		md_fwheads;	/* firmware heads */
65	int		md_fwsectors;	/* firmware sectors */
66	int		md_pad[MDNPAD];	/* padding for future ideas */
67};
68
69#define MD_NAME		"md"
70#define MDCTL_NAME	"mdctl"
71#define MDIOVERSION	0
72
73/*
74 * Before you can use a unit, it must be configured with MDIOCSET.
75 * The configuration persists across opens and closes of the device;
76 * an MDIOCCLR must be used to reset a configuration.  An attempt to
77 * MDIOCSET an already active unit will return EBUSY.
78 */
79
80#define MDIOCATTACH	_IOWR('m', 0, struct md_ioctl)	/* attach disk */
81#define MDIOCDETACH	_IOWR('m', 1, struct md_ioctl)	/* detach disk */
82#define MDIOCQUERY	_IOWR('m', 2, struct md_ioctl)	/* query status */
83#define MDIOCLIST	_IOWR('m', 3, struct md_ioctl)	/* query status */
84#define MDIOCRESIZE	_IOWR('m', 4, struct md_ioctl)	/* resize disk */
85
86#define MD_CLUSTER	0x01	/* Don't cluster */
87#define MD_RESERVE	0x02	/* Pre-reserve swap */
88#define MD_AUTOUNIT	0x04	/* Assign next free unit */
89#define MD_READONLY	0x08	/* Readonly mode */
90#define MD_COMPRESS	0x10	/* Compression mode */
91#define MD_FORCE	0x20	/* Don't try to prevent foot-shooting */
92#define MD_ASYNC	0x40	/* Asynchronous mode */
93
94#endif	/* _SYS_MDIOCTL_H_*/
95