1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * 32bit -> 64bit ioctl wrapper for raw MIDI API
4 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
7 /* This file included from rawmidi.c */
9 #include <linux/compat.h>
11 struct snd_rawmidi_params32 {
15 unsigned int no_active_sensing; /* avoid bit-field */
16 unsigned char reserved[16];
17 } __attribute__((packed));
19 static int snd_rawmidi_ioctl_params_compat(struct snd_rawmidi_file *rfile,
20 struct snd_rawmidi_params32 __user *src)
22 struct snd_rawmidi_params params;
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))
30 params.no_active_sensing = val;
31 switch (params.stream) {
32 case SNDRV_RAWMIDI_STREAM_OUTPUT:
35 return snd_rawmidi_output_params(rfile->output, ¶ms);
36 case SNDRV_RAWMIDI_STREAM_INPUT:
39 return snd_rawmidi_input_params(rfile->input, ¶ms);
44 struct compat_snd_rawmidi_status64 {
46 u8 rsvd[4]; /* alignment */
51 unsigned char reserved[16];
52 } __attribute__((packed));
54 static int snd_rawmidi_ioctl_status_compat64(struct snd_rawmidi_file *rfile,
55 struct compat_snd_rawmidi_status64 __user *src)
58 struct snd_rawmidi_status64 status;
59 struct compat_snd_rawmidi_status64 compat_status;
61 if (get_user(status.stream, &src->stream))
64 switch (status.stream) {
65 case SNDRV_RAWMIDI_STREAM_OUTPUT:
68 err = snd_rawmidi_output_status(rfile->output, &status);
70 case SNDRV_RAWMIDI_STREAM_INPUT:
73 err = snd_rawmidi_input_status(rfile->input, &status);
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,
89 if (copy_to_user(src, &compat_status, sizeof(*src)))
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),
101 static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
103 struct snd_rawmidi_file *rfile;
104 void __user *argp = compat_ptr(arg);
106 rfile = file->private_data;
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);