tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * 32bit -> 64bit ioctl wrapper for hwdep API
3 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 *
19 */
20
21/* This file is included from hwdep.c */
22
23#include <linux/compat.h>
24
25struct sndrv_hwdep_dsp_image32 {
26 u32 index;
27 unsigned char name[64];
28 u32 image; /* pointer */
29 u32 length;
30 u32 driver_data;
31} /* don't set packed attribute here */;
32
33static int snd_hwdep_dsp_load_compat(snd_hwdep_t *hw,
34 struct sndrv_hwdep_dsp_image32 __user *src)
35{
36 struct sndrv_hwdep_dsp_image *dst;
37 compat_caddr_t ptr;
38 u32 val;
39
40 dst = compat_alloc_user_space(sizeof(*dst));
41
42 /* index and name */
43 if (copy_in_user(dst, src, 4 + 64))
44 return -EFAULT;
45 if (get_user(ptr, &src->image) ||
46 put_user(compat_ptr(ptr), &dst->image))
47 return -EFAULT;
48 if (get_user(val, &src->length) ||
49 put_user(val, &dst->length))
50 return -EFAULT;
51 if (get_user(val, &src->driver_data) ||
52 put_user(val, &dst->driver_data))
53 return -EFAULT;
54
55 return snd_hwdep_dsp_load(hw, dst);
56}
57
58enum {
59 SNDRV_HWDEP_IOCTL_DSP_LOAD32 = _IOW('H', 0x03, struct sndrv_hwdep_dsp_image32)
60};
61
62static long snd_hwdep_ioctl_compat(struct file * file, unsigned int cmd, unsigned long arg)
63{
64 snd_hwdep_t *hw = file->private_data;
65 void __user *argp = compat_ptr(arg);
66 switch (cmd) {
67 case SNDRV_HWDEP_IOCTL_PVERSION:
68 case SNDRV_HWDEP_IOCTL_INFO:
69 case SNDRV_HWDEP_IOCTL_DSP_STATUS:
70 return snd_hwdep_ioctl(file, cmd, (unsigned long)argp);
71 case SNDRV_HWDEP_IOCTL_DSP_LOAD32:
72 return snd_hwdep_dsp_load_compat(hw, argp);
73 }
74 if (hw->ops.ioctl_compat)
75 return hw->ops.ioctl_compat(hw, file, cmd, arg);
76 return -ENOIOCTLCMD;
77}