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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 (compat_put_timespec(&status.tstamp, &src->tstamp) ||
89 put_user(status.avail, &src->avail) ||
90 put_user(status.xruns, &src->xruns))
91 return -EFAULT;
92
93 return 0;
94}
95
96#ifdef CONFIG_X86_X32
97/* X32 ABI has 64bit timespec and 64bit alignment */
98struct snd_rawmidi_status_x32 {
99 s32 stream;
100 u32 rsvd; /* alignment */
101 struct timespec tstamp;
102 u32 avail;
103 u32 xruns;
104 unsigned char reserved[16];
105} __attribute__((packed));
106
107#define put_timespec(src, dst) copy_to_user(dst, src, sizeof(*dst))
108
109static int snd_rawmidi_ioctl_status_x32(struct snd_rawmidi_file *rfile,
110 struct snd_rawmidi_status_x32 __user *src)
111{
112 int err;
113 struct snd_rawmidi_status status;
114
115 if (rfile->output == NULL)
116 return -EINVAL;
117 if (get_user(status.stream, &src->stream))
118 return -EFAULT;
119
120 switch (status.stream) {
121 case SNDRV_RAWMIDI_STREAM_OUTPUT:
122 err = snd_rawmidi_output_status(rfile->output, &status);
123 break;
124 case SNDRV_RAWMIDI_STREAM_INPUT:
125 err = snd_rawmidi_input_status(rfile->input, &status);
126 break;
127 default:
128 return -EINVAL;
129 }
130 if (err < 0)
131 return err;
132
133 if (put_timespec(&status.tstamp, &src->tstamp) ||
134 put_user(status.avail, &src->avail) ||
135 put_user(status.xruns, &src->xruns))
136 return -EFAULT;
137
138 return 0;
139}
140#endif /* CONFIG_X86_X32 */
141
142enum {
143 SNDRV_RAWMIDI_IOCTL_PARAMS32 = _IOWR('W', 0x10, struct snd_rawmidi_params32),
144 SNDRV_RAWMIDI_IOCTL_STATUS32 = _IOWR('W', 0x20, struct snd_rawmidi_status32),
145#ifdef CONFIG_X86_X32
146 SNDRV_RAWMIDI_IOCTL_STATUS_X32 = _IOWR('W', 0x20, struct snd_rawmidi_status_x32),
147#endif /* CONFIG_X86_X32 */
148};
149
150static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
151{
152 struct snd_rawmidi_file *rfile;
153 void __user *argp = compat_ptr(arg);
154
155 rfile = file->private_data;
156 switch (cmd) {
157 case SNDRV_RAWMIDI_IOCTL_PVERSION:
158 case SNDRV_RAWMIDI_IOCTL_INFO:
159 case SNDRV_RAWMIDI_IOCTL_DROP:
160 case SNDRV_RAWMIDI_IOCTL_DRAIN:
161 return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp);
162 case SNDRV_RAWMIDI_IOCTL_PARAMS32:
163 return snd_rawmidi_ioctl_params_compat(rfile, argp);
164 case SNDRV_RAWMIDI_IOCTL_STATUS32:
165 return snd_rawmidi_ioctl_status_compat(rfile, argp);
166#ifdef CONFIG_X86_X32
167 case SNDRV_RAWMIDI_IOCTL_STATUS_X32:
168 return snd_rawmidi_ioctl_status_x32(rfile, argp);
169#endif /* CONFIG_X86_X32 */
170 }
171 return -ENOIOCTLCMD;
172}
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 int mode;
17 unsigned char reserved[12];
18} __attribute__((packed));
19
20static int snd_rawmidi_ioctl_params_compat(struct snd_rawmidi_file *rfile,
21 struct snd_rawmidi_params32 __user *src)
22{
23 struct snd_rawmidi_params params;
24 unsigned int val;
25
26 if (get_user(params.stream, &src->stream) ||
27 get_user(params.buffer_size, &src->buffer_size) ||
28 get_user(params.avail_min, &src->avail_min) ||
29 get_user(params.mode, &src->mode) ||
30 get_user(val, &src->no_active_sensing))
31 return -EFAULT;
32 params.no_active_sensing = val;
33 switch (params.stream) {
34 case SNDRV_RAWMIDI_STREAM_OUTPUT:
35 if (!rfile->output)
36 return -EINVAL;
37 return snd_rawmidi_output_params(rfile->output, ¶ms);
38 case SNDRV_RAWMIDI_STREAM_INPUT:
39 if (!rfile->input)
40 return -EINVAL;
41 return snd_rawmidi_input_params(rfile->input, ¶ms);
42 }
43 return -EINVAL;
44}
45
46struct compat_snd_rawmidi_status64 {
47 s32 stream;
48 u8 rsvd[4]; /* alignment */
49 s64 tstamp_sec;
50 s64 tstamp_nsec;
51 u32 avail;
52 u32 xruns;
53 unsigned char reserved[16];
54} __attribute__((packed));
55
56static int snd_rawmidi_ioctl_status_compat64(struct snd_rawmidi_file *rfile,
57 struct compat_snd_rawmidi_status64 __user *src)
58{
59 int err;
60 struct snd_rawmidi_status64 status;
61 struct compat_snd_rawmidi_status64 compat_status;
62
63 if (get_user(status.stream, &src->stream))
64 return -EFAULT;
65
66 switch (status.stream) {
67 case SNDRV_RAWMIDI_STREAM_OUTPUT:
68 if (!rfile->output)
69 return -EINVAL;
70 err = snd_rawmidi_output_status(rfile->output, &status);
71 break;
72 case SNDRV_RAWMIDI_STREAM_INPUT:
73 if (!rfile->input)
74 return -EINVAL;
75 err = snd_rawmidi_input_status(rfile->input, &status);
76 break;
77 default:
78 return -EINVAL;
79 }
80 if (err < 0)
81 return err;
82
83 compat_status = (struct compat_snd_rawmidi_status64) {
84 .stream = status.stream,
85 .tstamp_sec = status.tstamp_sec,
86 .tstamp_nsec = status.tstamp_nsec,
87 .avail = status.avail,
88 .xruns = status.xruns,
89 };
90
91 if (copy_to_user(src, &compat_status, sizeof(*src)))
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_STATUS_COMPAT32 = _IOWR('W', 0x20, struct snd_rawmidi_status32),
100 SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT64 = _IOWR('W', 0x20, struct compat_snd_rawmidi_status64),
101};
102
103static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
104{
105 struct snd_rawmidi_file *rfile;
106 void __user *argp = compat_ptr(arg);
107
108 rfile = file->private_data;
109 switch (cmd) {
110 case SNDRV_RAWMIDI_IOCTL_PVERSION:
111 case SNDRV_RAWMIDI_IOCTL_INFO:
112 case SNDRV_RAWMIDI_IOCTL_DROP:
113 case SNDRV_RAWMIDI_IOCTL_DRAIN:
114 return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp);
115 case SNDRV_RAWMIDI_IOCTL_PARAMS32:
116 return snd_rawmidi_ioctl_params_compat(rfile, argp);
117 case SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT32:
118 return snd_rawmidi_ioctl_status32(rfile, argp);
119 case SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT64:
120 return snd_rawmidi_ioctl_status_compat64(rfile, argp);
121 }
122 return -ENOIOCTLCMD;
123}