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
39#ifndef _SYS_MDIOCTL_H_
40#define _SYS_MDIOCTL_H_
41
42enum md_types {MD_MALLOC, MD_PRELOAD, MD_VNODE, MD_SWAP, MD_NULL};
43
44/*
45 * Ioctl definitions for memory disk pseudo-device.
46 */
47
48#define MDNPAD 96
49struct md_ioctl {
50 unsigned md_version; /* Structure layout version */
51 unsigned md_unit; /* unit number */
52 enum md_types md_type ; /* type of disk */
53 char *md_file; /* pathname of file to mount */
54 off_t md_mediasize; /* size of disk in bytes */
55 unsigned md_sectorsize; /* sectorsize */
56 unsigned md_options; /* options */
57 u_int64_t md_base; /* base address */
58 int md_fwheads; /* firmware heads */
59 int md_fwsectors; /* firmware sectors */
60 char *md_label; /* label of the device */
61 int md_pad[MDNPAD]; /* padding */
62};
63
64#define MD_NAME "md"
65#define MDCTL_NAME "mdctl"
66#define MDIOVERSION 0
67
68/*
69 * Before you can use a unit, it must be configured with MDIOCSET.
70 * The configuration persists across opens and closes of the device;
71 * an MDIOCCLR must be used to reset a configuration. An attempt to
72 * MDIOCSET an already active unit will return EBUSY.
73 */
74
75#define MDIOCATTACH _IOWR('m', 0, struct md_ioctl) /* attach disk */
76#define MDIOCDETACH _IOWR('m', 1, struct md_ioctl) /* detach disk */
77#define MDIOCQUERY _IOWR('m', 2, struct md_ioctl) /* query status */
78#define MDIOCRESIZE _IOWR('m', 4, struct md_ioctl) /* resize disk */
79
80#define MD_CLUSTER 0x01 /* Don't cluster */
81#define MD_RESERVE 0x02 /* Pre-reserve swap */
82#define MD_AUTOUNIT 0x04 /* Assign next free unit */
83#define MD_READONLY 0x08 /* Readonly mode */
84#define MD_COMPRESS 0x10 /* Compression mode */
85#define MD_FORCE 0x20 /* Don't try to prevent foot-shooting */
86#define MD_ASYNC 0x40 /* Asynchronous mode */
87#define MD_VERIFY 0x80 /* Open file with O_VERIFY (vnode only) */
88#define MD_CACHE 0x100 /* Cache vnode data */
89#define MD_MUSTDEALLOC 0x200 /* BIO_DELETE only if dealloc is available */
90
91#endif /* _SYS_MDIOCTL_H_*/