aac_linux.c revision 280258 
1/*-
2 * Copyright (c) 2002 Scott Long
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#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: stable/10/sys/dev/aac/aac_linux.c 280258 2015-03-19 13:37:36Z rwatson $");
29
30/*
31 * Linux ioctl handler for the aac device driver
32 */
33
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/capsicum.h>
37#include <sys/conf.h>
38#include <sys/kernel.h>
39#include <sys/module.h>
40#include <sys/file.h>
41#include <sys/proc.h>
42#ifdef __amd64__
43#include <machine/../linux32/linux.h>
44#include <machine/../linux32/linux32_proto.h>
45#else
46#include <machine/../linux/linux.h>
47#include <machine/../linux/linux_proto.h>
48#endif
49#include <compat/linux/linux_ioctl.h>
50
51/* There are multiple ioctl number ranges that need to be handled */
52#define AAC_LINUX_IOCTL_MIN  0x0000
53#define AAC_LINUX_IOCTL_MAX  0x21ff
54
55static linux_ioctl_function_t aac_linux_ioctl;
56static struct linux_ioctl_handler aac_linux_handler = {aac_linux_ioctl,
57						       AAC_LINUX_IOCTL_MIN,
58						       AAC_LINUX_IOCTL_MAX};
59
60SYSINIT  (aac_linux_register,   SI_SUB_KLD, SI_ORDER_MIDDLE,
61	  linux_ioctl_register_handler, &aac_linux_handler);
62SYSUNINIT(aac_linux_unregister, SI_SUB_KLD, SI_ORDER_MIDDLE,
63	  linux_ioctl_unregister_handler, &aac_linux_handler);
64
65static int
66aac_linux_modevent(module_t mod, int type, void *data)
67{
68	/* Do we care about any specific load/unload actions? */
69	return (0);
70}
71
72DEV_MODULE(aac_linux, aac_linux_modevent, NULL);
73MODULE_DEPEND(aac_linux, linux, 1, 1, 1);
74
75static int
76aac_linux_ioctl(struct thread *td, struct linux_ioctl_args *args)
77{
78	cap_rights_t rights;
79	struct file *fp;
80	u_long cmd;
81	int error;
82
83	error = fget(td, args->fd, cap_rights_init(&rights, CAP_IOCTL), &fp);
84	if (error != 0)
85		return (error);
86	cmd = args->cmd;
87
88	/*
89	 * Pass the ioctl off to our standard handler.
90	 */
91	error = (fo_ioctl(fp, cmd, (caddr_t)args->arg, td->td_ucred, td));
92	fdrop(fp, td);
93	return (error);
94}
95