amr_linux.c revision 280258 
1/*-
2 * Copyright (c) 2005 Paul Saab
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD: stable/10/sys/dev/amr/amr_linux.c 280258 2015-03-19 13:37:36Z rwatson $");
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/capsicum.h>
34#include <sys/conf.h>
35#include <sys/kernel.h>
36#include <sys/module.h>
37#include <sys/file.h>
38#include <sys/proc.h>
39
40#if defined(__amd64__) /* Assume amd64 wants 32 bit Linux */
41#include <machine/../linux32/linux.h>
42#include <machine/../linux32/linux32_proto.h>
43#else
44#include <machine/../linux/linux.h>
45#include <machine/../linux/linux_proto.h>
46#endif
47#include <compat/linux/linux_ioctl.h>
48
49/* There are multiple ioctl number ranges that need to be handled */
50#define AMR_LINUX_IOCTL_MIN  0x6d00
51#define AMR_LINUX_IOCTL_MAX  0x6d01
52
53static linux_ioctl_function_t amr_linux_ioctl;
54static struct linux_ioctl_handler amr_linux_handler = {amr_linux_ioctl,
55						       AMR_LINUX_IOCTL_MIN,
56						       AMR_LINUX_IOCTL_MAX};
57
58SYSINIT  (amr_register,   SI_SUB_KLD, SI_ORDER_MIDDLE,
59	  linux_ioctl_register_handler, &amr_linux_handler);
60SYSUNINIT(amr_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
61	  linux_ioctl_unregister_handler, &amr_linux_handler);
62
63static int
64amr_linux_modevent(module_t mod, int cmd, void *data)
65{
66	return (0);
67}
68
69DEV_MODULE(amr_linux, amr_linux_modevent, NULL);
70MODULE_DEPEND(amr, linux, 1, 1, 1);
71
72static int
73amr_linux_ioctl(struct thread *p, struct linux_ioctl_args *args)
74{
75	cap_rights_t rights;
76	struct file *fp;
77	int error;
78
79	error = fget(p, args->fd, cap_rights_init(&rights, CAP_IOCTL), &fp);
80	if (error != 0)
81		return (error);
82	error = fo_ioctl(fp, args->cmd, (caddr_t)args->arg, p->td_ucred, p);
83	fdrop(fp, p);
84	return (error);
85}
86