1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 *   32bit -> 64bit ioctl wrapper for hwdep API
 4 *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
 5 */
 6
 7/* This file is included from hwdep.c */
 8
 9#include <linux/compat.h>
10
11struct snd_hwdep_dsp_image32 {
12	u32 index;
13	unsigned char name[64];
14	u32 image;	/* pointer */
15	u32 length;
16	u32 driver_data;
17} /* don't set packed attribute here */;
18
19static int snd_hwdep_dsp_load_compat(struct snd_hwdep *hw,
20				     struct snd_hwdep_dsp_image32 __user *src)
21{
22	struct snd_hwdep_dsp_image __user *dst;
23	compat_caddr_t ptr;
24	u32 val;
25
26	dst = compat_alloc_user_space(sizeof(*dst));
27
28	/* index and name */
29	if (copy_in_user(dst, src, 4 + 64))
30		return -EFAULT;
31	if (get_user(ptr, &src->image) ||
32	    put_user(compat_ptr(ptr), &dst->image))
33		return -EFAULT;
34	if (get_user(val, &src->length) ||
35	    put_user(val, &dst->length))
36		return -EFAULT;
37	if (get_user(val, &src->driver_data) ||
38	    put_user(val, &dst->driver_data))
39		return -EFAULT;
40
41	return snd_hwdep_dsp_load(hw, dst);
42}
43
44enum {
45	SNDRV_HWDEP_IOCTL_DSP_LOAD32   = _IOW('H', 0x03, struct snd_hwdep_dsp_image32)
46};
47
48static long snd_hwdep_ioctl_compat(struct file * file, unsigned int cmd,
49				   unsigned long arg)
50{
51	struct snd_hwdep *hw = file->private_data;
52	void __user *argp = compat_ptr(arg);
53	switch (cmd) {
54	case SNDRV_HWDEP_IOCTL_PVERSION:
55	case SNDRV_HWDEP_IOCTL_INFO:
56	case SNDRV_HWDEP_IOCTL_DSP_STATUS:
57		return snd_hwdep_ioctl(file, cmd, (unsigned long)argp);
58	case SNDRV_HWDEP_IOCTL_DSP_LOAD32:
59		return snd_hwdep_dsp_load_compat(hw, argp);
60	}
61	if (hw->ops.ioctl_compat)
62		return hw->ops.ioctl_compat(hw, file, cmd, arg);
63	return -ENOIOCTLCMD;
64}

 1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 *   32bit -> 64bit ioctl wrapper for hwdep API
 4 *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
 5 */
 6
 7/* This file is included from hwdep.c */
 8
 9#include <linux/compat.h>
10
11struct snd_hwdep_dsp_image32 {
12	u32 index;
13	unsigned char name[64];
14	u32 image;	/* pointer */
15	u32 length;
16	u32 driver_data;
17} /* don't set packed attribute here */;
18
19static int snd_hwdep_dsp_load_compat(struct snd_hwdep *hw,
20				     struct snd_hwdep_dsp_image32 __user *src)
21{
22	struct snd_hwdep_dsp_image __user *dst;
23	compat_caddr_t ptr;
24	u32 val;
25
26	dst = compat_alloc_user_space(sizeof(*dst));
27
28	/* index and name */
29	if (copy_in_user(dst, src, 4 + 64))
30		return -EFAULT;
31	if (get_user(ptr, &src->image) ||
32	    put_user(compat_ptr(ptr), &dst->image))
33		return -EFAULT;
34	if (get_user(val, &src->length) ||
35	    put_user(val, &dst->length))
36		return -EFAULT;
37	if (get_user(val, &src->driver_data) ||
38	    put_user(val, &dst->driver_data))
39		return -EFAULT;
40
41	return snd_hwdep_dsp_load(hw, dst);
42}
43
44enum {
45	SNDRV_HWDEP_IOCTL_DSP_LOAD32   = _IOW('H', 0x03, struct snd_hwdep_dsp_image32)
46};
47
48static long snd_hwdep_ioctl_compat(struct file * file, unsigned int cmd,
49				   unsigned long arg)
50{
51	struct snd_hwdep *hw = file->private_data;
52	void __user *argp = compat_ptr(arg);
53	switch (cmd) {
54	case SNDRV_HWDEP_IOCTL_PVERSION:
55	case SNDRV_HWDEP_IOCTL_INFO:
56	case SNDRV_HWDEP_IOCTL_DSP_STATUS:
57		return snd_hwdep_ioctl(file, cmd, (unsigned long)argp);
58	case SNDRV_HWDEP_IOCTL_DSP_LOAD32:
59		return snd_hwdep_dsp_load_compat(hw, argp);
60	}
61	if (hw->ops.ioctl_compat)
62		return hw->ops.ioctl_compat(hw, file, cmd, arg);
63	return -ENOIOCTLCMD;
64}