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1/*
2 * 32bit -> 64bit ioctl wrapper for raw MIDI 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 included from rawmidi.c */
22
23#include <linux/compat.h>
24
25struct snd_rawmidi_params32 {
26 s32 stream;
27 u32 buffer_size;
28 u32 avail_min;
29 unsigned int no_active_sensing; /* avoid bit-field */
30 unsigned char reserved[16];
31} __attribute__((packed));
32
33static int snd_rawmidi_ioctl_params_compat(struct snd_rawmidi_file *rfile,
34 struct snd_rawmidi_params32 __user *src)
35{
36 struct snd_rawmidi_params params;
37 unsigned int val;
38
39 if (rfile->output == NULL)
40 return -EINVAL;
41 if (get_user(params.stream, &src->stream) ||
42 get_user(params.buffer_size, &src->buffer_size) ||
43 get_user(params.avail_min, &src->avail_min) ||
44 get_user(val, &src->no_active_sensing))
45 return -EFAULT;
46 params.no_active_sensing = val;
47 switch (params.stream) {
48 case SNDRV_RAWMIDI_STREAM_OUTPUT:
49 return snd_rawmidi_output_params(rfile->output, ¶ms);
50 case SNDRV_RAWMIDI_STREAM_INPUT:
51 return snd_rawmidi_input_params(rfile->input, ¶ms);
52 }
53 return -EINVAL;
54}
55
56struct snd_rawmidi_status32 {
57 s32 stream;
58 struct compat_timespec tstamp;
59 u32 avail;
60 u32 xruns;
61 unsigned char reserved[16];
62} __attribute__((packed));
63
64static int snd_rawmidi_ioctl_status_compat(struct snd_rawmidi_file *rfile,
65 struct snd_rawmidi_status32 __user *src)
66{
67 int err;
68 struct snd_rawmidi_status status;
69
70 if (rfile->output == NULL)
71 return -EINVAL;
72 if (get_user(status.stream, &src->stream))
73 return -EFAULT;
74
75 switch (status.stream) {
76 case SNDRV_RAWMIDI_STREAM_OUTPUT:
77 err = snd_rawmidi_output_status(rfile->output, &status);
78 break;
79 case SNDRV_RAWMIDI_STREAM_INPUT:
80 err = snd_rawmidi_input_status(rfile->input, &status);
81 break;
82 default:
83 return -EINVAL;
84 }
85 if (err < 0)
86 return err;
87
88 if (put_user(status.tstamp.tv_sec, &src->tstamp.tv_sec) ||
89 put_user(status.tstamp.tv_nsec, &src->tstamp.tv_nsec) ||
90 put_user(status.avail, &src->avail) ||
91 put_user(status.xruns, &src->xruns))
92 return -EFAULT;
93
94 return 0;
95}
96
97enum {
98 SNDRV_RAWMIDI_IOCTL_PARAMS32 = _IOWR('W', 0x10, struct snd_rawmidi_params32),
99 SNDRV_RAWMIDI_IOCTL_STATUS32 = _IOWR('W', 0x20, struct snd_rawmidi_status32),
100};
101
102static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
103{
104 struct snd_rawmidi_file *rfile;
105 void __user *argp = compat_ptr(arg);
106
107 rfile = file->private_data;
108 switch (cmd) {
109 case SNDRV_RAWMIDI_IOCTL_PVERSION:
110 case SNDRV_RAWMIDI_IOCTL_INFO:
111 case SNDRV_RAWMIDI_IOCTL_DROP:
112 case SNDRV_RAWMIDI_IOCTL_DRAIN:
113 return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp);
114 case SNDRV_RAWMIDI_IOCTL_PARAMS32:
115 return snd_rawmidi_ioctl_params_compat(rfile, argp);
116 case SNDRV_RAWMIDI_IOCTL_STATUS32:
117 return snd_rawmidi_ioctl_status_compat(rfile, argp);
118 }
119 return -ENOIOCTLCMD;
120}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * 32bit -> 64bit ioctl wrapper for raw MIDI API
4 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
5 */
6
7/* This file included from rawmidi.c */
8
9#include <linux/compat.h>
10
11struct snd_rawmidi_params32 {
12 s32 stream;
13 u32 buffer_size;
14 u32 avail_min;
15 unsigned int no_active_sensing; /* avoid bit-field */
16 unsigned char reserved[16];
17} __attribute__((packed));
18
19static int snd_rawmidi_ioctl_params_compat(struct snd_rawmidi_file *rfile,
20 struct snd_rawmidi_params32 __user *src)
21{
22 struct snd_rawmidi_params params;
23 unsigned int val;
24
25 if (get_user(params.stream, &src->stream) ||
26 get_user(params.buffer_size, &src->buffer_size) ||
27 get_user(params.avail_min, &src->avail_min) ||
28 get_user(val, &src->no_active_sensing))
29 return -EFAULT;
30 params.no_active_sensing = val;
31 switch (params.stream) {
32 case SNDRV_RAWMIDI_STREAM_OUTPUT:
33 if (!rfile->output)
34 return -EINVAL;
35 return snd_rawmidi_output_params(rfile->output, ¶ms);
36 case SNDRV_RAWMIDI_STREAM_INPUT:
37 if (!rfile->input)
38 return -EINVAL;
39 return snd_rawmidi_input_params(rfile->input, ¶ms);
40 }
41 return -EINVAL;
42}
43
44struct compat_snd_rawmidi_status64 {
45 s32 stream;
46 u8 rsvd[4]; /* alignment */
47 s64 tstamp_sec;
48 s64 tstamp_nsec;
49 u32 avail;
50 u32 xruns;
51 unsigned char reserved[16];
52} __attribute__((packed));
53
54static int snd_rawmidi_ioctl_status_compat64(struct snd_rawmidi_file *rfile,
55 struct compat_snd_rawmidi_status64 __user *src)
56{
57 int err;
58 struct snd_rawmidi_status64 status;
59 struct compat_snd_rawmidi_status64 compat_status;
60
61 if (get_user(status.stream, &src->stream))
62 return -EFAULT;
63
64 switch (status.stream) {
65 case SNDRV_RAWMIDI_STREAM_OUTPUT:
66 if (!rfile->output)
67 return -EINVAL;
68 err = snd_rawmidi_output_status(rfile->output, &status);
69 break;
70 case SNDRV_RAWMIDI_STREAM_INPUT:
71 if (!rfile->input)
72 return -EINVAL;
73 err = snd_rawmidi_input_status(rfile->input, &status);
74 break;
75 default:
76 return -EINVAL;
77 }
78 if (err < 0)
79 return err;
80
81 compat_status = (struct compat_snd_rawmidi_status64) {
82 .stream = status.stream,
83 .tstamp_sec = status.tstamp_sec,
84 .tstamp_nsec = status.tstamp_nsec,
85 .avail = status.avail,
86 .xruns = status.xruns,
87 };
88
89 if (copy_to_user(src, &compat_status, sizeof(*src)))
90 return -EFAULT;
91
92 return 0;
93}
94
95enum {
96 SNDRV_RAWMIDI_IOCTL_PARAMS32 = _IOWR('W', 0x10, struct snd_rawmidi_params32),
97 SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT32 = _IOWR('W', 0x20, struct snd_rawmidi_status32),
98 SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT64 = _IOWR('W', 0x20, struct compat_snd_rawmidi_status64),
99};
100
101static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
102{
103 struct snd_rawmidi_file *rfile;
104 void __user *argp = compat_ptr(arg);
105
106 rfile = file->private_data;
107 switch (cmd) {
108 case SNDRV_RAWMIDI_IOCTL_PVERSION:
109 case SNDRV_RAWMIDI_IOCTL_INFO:
110 case SNDRV_RAWMIDI_IOCTL_DROP:
111 case SNDRV_RAWMIDI_IOCTL_DRAIN:
112 return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp);
113 case SNDRV_RAWMIDI_IOCTL_PARAMS32:
114 return snd_rawmidi_ioctl_params_compat(rfile, argp);
115 case SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT32:
116 return snd_rawmidi_ioctl_status32(rfile, argp);
117 case SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT64:
118 return snd_rawmidi_ioctl_status_compat64(rfile, argp);
119 }
120 return -ENOIOCTLCMD;
121}