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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 snd_rawmidi_status32 {
45 s32 stream;
46 struct compat_timespec tstamp;
47 u32 avail;
48 u32 xruns;
49 unsigned char reserved[16];
50} __attribute__((packed));
51
52static int snd_rawmidi_ioctl_status_compat(struct snd_rawmidi_file *rfile,
53 struct snd_rawmidi_status32 __user *src)
54{
55 int err;
56 struct snd_rawmidi_status status;
57
58 if (get_user(status.stream, &src->stream))
59 return -EFAULT;
60
61 switch (status.stream) {
62 case SNDRV_RAWMIDI_STREAM_OUTPUT:
63 if (!rfile->output)
64 return -EINVAL;
65 err = snd_rawmidi_output_status(rfile->output, &status);
66 break;
67 case SNDRV_RAWMIDI_STREAM_INPUT:
68 if (!rfile->input)
69 return -EINVAL;
70 err = snd_rawmidi_input_status(rfile->input, &status);
71 break;
72 default:
73 return -EINVAL;
74 }
75 if (err < 0)
76 return err;
77
78 if (compat_put_timespec(&status.tstamp, &src->tstamp) ||
79 put_user(status.avail, &src->avail) ||
80 put_user(status.xruns, &src->xruns))
81 return -EFAULT;
82
83 return 0;
84}
85
86#ifdef CONFIG_X86_X32
87/* X32 ABI has 64bit timespec and 64bit alignment */
88struct snd_rawmidi_status_x32 {
89 s32 stream;
90 u32 rsvd; /* alignment */
91 struct timespec tstamp;
92 u32 avail;
93 u32 xruns;
94 unsigned char reserved[16];
95} __attribute__((packed));
96
97#define put_timespec(src, dst) copy_to_user(dst, src, sizeof(*dst))
98
99static int snd_rawmidi_ioctl_status_x32(struct snd_rawmidi_file *rfile,
100 struct snd_rawmidi_status_x32 __user *src)
101{
102 int err;
103 struct snd_rawmidi_status status;
104
105 if (get_user(status.stream, &src->stream))
106 return -EFAULT;
107
108 switch (status.stream) {
109 case SNDRV_RAWMIDI_STREAM_OUTPUT:
110 if (!rfile->output)
111 return -EINVAL;
112 err = snd_rawmidi_output_status(rfile->output, &status);
113 break;
114 case SNDRV_RAWMIDI_STREAM_INPUT:
115 if (!rfile->input)
116 return -EINVAL;
117 err = snd_rawmidi_input_status(rfile->input, &status);
118 break;
119 default:
120 return -EINVAL;
121 }
122 if (err < 0)
123 return err;
124
125 if (put_timespec(&status.tstamp, &src->tstamp) ||
126 put_user(status.avail, &src->avail) ||
127 put_user(status.xruns, &src->xruns))
128 return -EFAULT;
129
130 return 0;
131}
132#endif /* CONFIG_X86_X32 */
133
134enum {
135 SNDRV_RAWMIDI_IOCTL_PARAMS32 = _IOWR('W', 0x10, struct snd_rawmidi_params32),
136 SNDRV_RAWMIDI_IOCTL_STATUS32 = _IOWR('W', 0x20, struct snd_rawmidi_status32),
137#ifdef CONFIG_X86_X32
138 SNDRV_RAWMIDI_IOCTL_STATUS_X32 = _IOWR('W', 0x20, struct snd_rawmidi_status_x32),
139#endif /* CONFIG_X86_X32 */
140};
141
142static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
143{
144 struct snd_rawmidi_file *rfile;
145 void __user *argp = compat_ptr(arg);
146
147 rfile = file->private_data;
148 switch (cmd) {
149 case SNDRV_RAWMIDI_IOCTL_PVERSION:
150 case SNDRV_RAWMIDI_IOCTL_INFO:
151 case SNDRV_RAWMIDI_IOCTL_DROP:
152 case SNDRV_RAWMIDI_IOCTL_DRAIN:
153 return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp);
154 case SNDRV_RAWMIDI_IOCTL_PARAMS32:
155 return snd_rawmidi_ioctl_params_compat(rfile, argp);
156 case SNDRV_RAWMIDI_IOCTL_STATUS32:
157 return snd_rawmidi_ioctl_status_compat(rfile, argp);
158#ifdef CONFIG_X86_X32
159 case SNDRV_RAWMIDI_IOCTL_STATUS_X32:
160 return snd_rawmidi_ioctl_status_x32(rfile, argp);
161#endif /* CONFIG_X86_X32 */
162 }
163 return -ENOIOCTLCMD;
164}
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}