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 */
17 unsigned char reserved[12];
18 } __attribute__((packed));
20 static int snd_rawmidi_ioctl_params_compat(struct snd_rawmidi_file *rfile,
21 struct snd_rawmidi_params32 __user *src)
23 struct snd_rawmidi_params params;
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))
32 params.no_active_sensing = val;
33 switch (params.stream) {
34 case SNDRV_RAWMIDI_STREAM_OUTPUT:
37 return snd_rawmidi_output_params(rfile->output, ¶ms);
38 case SNDRV_RAWMIDI_STREAM_INPUT:
41 return snd_rawmidi_input_params(rfile->input, ¶ms);
46 struct compat_snd_rawmidi_status64 {
48 u8 rsvd[4]; /* alignment */
53 unsigned char reserved[16];
54 } __attribute__((packed));
56 static int snd_rawmidi_ioctl_status_compat64(struct snd_rawmidi_file *rfile,
57 struct compat_snd_rawmidi_status64 __user *src)
60 struct snd_rawmidi_status64 status;
61 struct compat_snd_rawmidi_status64 compat_status;
63 if (get_user(status.stream, &src->stream))
66 switch (status.stream) {
67 case SNDRV_RAWMIDI_STREAM_OUTPUT:
70 err = snd_rawmidi_output_status(rfile->output, &status);
72 case SNDRV_RAWMIDI_STREAM_INPUT:
75 err = snd_rawmidi_input_status(rfile->input, &status);
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,
91 if (copy_to_user(src, &compat_status, sizeof(*src)))
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),
103 static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
105 struct snd_rawmidi_file *rfile;
106 void __user *argp = compat_ptr(arg);
108 rfile = file->private_data;
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 #if IS_ENABLED(CONFIG_SND_UMP)
115 case SNDRV_UMP_IOCTL_ENDPOINT_INFO:
116 case SNDRV_UMP_IOCTL_BLOCK_INFO:
118 return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp);
119 case SNDRV_RAWMIDI_IOCTL_PARAMS32:
120 return snd_rawmidi_ioctl_params_compat(rfile, argp);
121 case SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT32:
122 return snd_rawmidi_ioctl_status32(rfile, argp);
123 case SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT64:
124 return snd_rawmidi_ioctl_status_compat64(rfile, argp);