1/*	$NetBSD: linux_blkio.c,v 1.18 2015/12/08 20:36:14 christos Exp $	*/
2
3/*
4 * Copyright (c) 2001 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Frank van der Linden for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *      This product includes software developed for the NetBSD Project by
20 *      Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 *    or promote products derived from this software without specific prior
23 *    written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <sys/cdefs.h>
39__KERNEL_RCSID(0, "$NetBSD: linux_blkio.c,v 1.18 2015/12/08 20:36:14 christos Exp $");
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/ioctl.h>
44#include <sys/file.h>
45#include <sys/filedesc.h>
46#include <sys/mount.h>
47#include <sys/proc.h>
48#include <sys/disklabel.h>
49
50#include <sys/syscallargs.h>
51
52#include <compat/linux/common/linux_types.h>
53#include <compat/linux/common/linux_ioctl.h>
54#include <compat/linux/common/linux_signal.h>
55#include <compat/linux/common/linux_util.h>
56#include <compat/linux/common/linux_blkio.h>
57#include <compat/linux/common/linux_ipc.h>
58#include <compat/linux/common/linux_sem.h>
59
60#include <compat/linux/linux_syscallargs.h>
61
62int
63linux_ioctl_blkio(struct lwp *l, const struct linux_sys_ioctl_args *uap,
64    register_t *retval)
65{
66	u_long com;
67	long size;
68	int error;
69	file_t *fp;
70	int (*ioctlf)(file_t *, u_long, void *);
71	struct partinfo pi;
72	struct disklabel label;
73
74	if ((fp = fd_getfile(SCARG(uap, fd))) == NULL)
75		return (EBADF);
76
77	error = 0;
78	ioctlf = fp->f_ops->fo_ioctl;
79	com = SCARG(uap, com);
80
81	switch (com) {
82	case LINUX_BLKGETSIZE:
83		/*
84		 * Try to get the partition size of this device. If that
85		 * fails, it may be a disk without label; try to get
86		 * the default label and compute the size from it.
87		 */
88		error = ioctlf(fp, DIOCGPARTINFO, &pi);
89		if (error != 0) {
90			error = ioctlf(fp, DIOCGDINFO, &label);
91			if (error != 0)
92				break;
93			size = label.d_nsectors * label.d_ntracks *
94			    label.d_ncylinders;
95		} else
96			size = pi.pi_size;
97		error = copyout(&size, SCARG(uap, data), sizeof size);
98		break;
99	case LINUX_BLKSECTGET:
100		error = ioctlf(fp, DIOCGDINFO, &label);
101		if (error != 0)
102			break;
103		error = copyout(&label.d_secsize, SCARG(uap, data),
104		    sizeof label.d_secsize);
105		break;
106	case LINUX_BLKROSET:
107	case LINUX_BLKROGET:
108	case LINUX_BLKRRPART:
109	case LINUX_BLKFLSBUF:
110	case LINUX_BLKRASET:
111	case LINUX_BLKRAGET:
112	case LINUX_BLKFRASET:
113	case LINUX_BLKFRAGET:
114	case LINUX_BLKSECTSET:
115	case LINUX_BLKSSZGET:
116	case LINUX_BLKPG:
117	default:
118		error = ENOTTY;
119	}
120
121	fd_putfile(SCARG(uap, fd));
122
123	return error;
124}
125