11a59d1b8SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 21da177e4SLinus Torvalds /* 31da177e4SLinus Torvalds * 32bit -> 64bit ioctl wrapper for raw MIDI API 41da177e4SLinus Torvalds * Copyright (c) by Takashi Iwai <tiwai@suse.de> 51da177e4SLinus Torvalds */ 61da177e4SLinus Torvalds 71da177e4SLinus Torvalds /* This file included from rawmidi.c */ 81da177e4SLinus Torvalds 91da177e4SLinus Torvalds #include <linux/compat.h> 101da177e4SLinus Torvalds 1148c9d417STakashi Iwai struct snd_rawmidi_params32 { 121da177e4SLinus Torvalds s32 stream; 131da177e4SLinus Torvalds u32 buffer_size; 141da177e4SLinus Torvalds u32 avail_min; 151da177e4SLinus Torvalds unsigned int no_active_sensing; /* avoid bit-field */ 161da177e4SLinus Torvalds unsigned char reserved[16]; 171da177e4SLinus Torvalds } __attribute__((packed)); 181da177e4SLinus Torvalds 1948c9d417STakashi Iwai static int snd_rawmidi_ioctl_params_compat(struct snd_rawmidi_file *rfile, 2048c9d417STakashi Iwai struct snd_rawmidi_params32 __user *src) 211da177e4SLinus Torvalds { 2248c9d417STakashi Iwai struct snd_rawmidi_params params; 231da177e4SLinus Torvalds unsigned int val; 241da177e4SLinus Torvalds 251da177e4SLinus Torvalds if (get_user(params.stream, &src->stream) || 261da177e4SLinus Torvalds get_user(params.buffer_size, &src->buffer_size) || 271da177e4SLinus Torvalds get_user(params.avail_min, &src->avail_min) || 281da177e4SLinus Torvalds get_user(val, &src->no_active_sensing)) 291da177e4SLinus Torvalds return -EFAULT; 301da177e4SLinus Torvalds params.no_active_sensing = val; 311da177e4SLinus Torvalds switch (params.stream) { 321da177e4SLinus Torvalds case SNDRV_RAWMIDI_STREAM_OUTPUT: 338a56ef4fSTakashi Iwai if (!rfile->output) 348a56ef4fSTakashi Iwai return -EINVAL; 351da177e4SLinus Torvalds return snd_rawmidi_output_params(rfile->output, ¶ms); 361da177e4SLinus Torvalds case SNDRV_RAWMIDI_STREAM_INPUT: 378a56ef4fSTakashi Iwai if (!rfile->input) 388a56ef4fSTakashi Iwai return -EINVAL; 391da177e4SLinus Torvalds return snd_rawmidi_input_params(rfile->input, ¶ms); 401da177e4SLinus Torvalds } 411da177e4SLinus Torvalds return -EINVAL; 421da177e4SLinus Torvalds } 431da177e4SLinus Torvalds 44d9e5582cSBaolin Wang struct compat_snd_rawmidi_status64 { 451da177e4SLinus Torvalds s32 stream; 46d9e5582cSBaolin Wang u8 rsvd[4]; /* alignment */ 47d9e5582cSBaolin Wang s64 tstamp_sec; 48d9e5582cSBaolin Wang s64 tstamp_nsec; 491da177e4SLinus Torvalds u32 avail; 501da177e4SLinus Torvalds u32 xruns; 511da177e4SLinus Torvalds unsigned char reserved[16]; 521da177e4SLinus Torvalds } __attribute__((packed)); 531da177e4SLinus Torvalds 54d9e5582cSBaolin Wang static int snd_rawmidi_ioctl_status_compat64(struct snd_rawmidi_file *rfile, 55d9e5582cSBaolin Wang struct compat_snd_rawmidi_status64 __user *src) 561da177e4SLinus Torvalds { 571da177e4SLinus Torvalds int err; 58d9e5582cSBaolin Wang struct snd_rawmidi_status64 status; 59d9e5582cSBaolin Wang struct compat_snd_rawmidi_status64 compat_status; 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds if (get_user(status.stream, &src->stream)) 621da177e4SLinus Torvalds return -EFAULT; 631da177e4SLinus Torvalds 641da177e4SLinus Torvalds switch (status.stream) { 651da177e4SLinus Torvalds case SNDRV_RAWMIDI_STREAM_OUTPUT: 668a56ef4fSTakashi Iwai if (!rfile->output) 678a56ef4fSTakashi Iwai return -EINVAL; 681da177e4SLinus Torvalds err = snd_rawmidi_output_status(rfile->output, &status); 691da177e4SLinus Torvalds break; 701da177e4SLinus Torvalds case SNDRV_RAWMIDI_STREAM_INPUT: 718a56ef4fSTakashi Iwai if (!rfile->input) 728a56ef4fSTakashi Iwai return -EINVAL; 731da177e4SLinus Torvalds err = snd_rawmidi_input_status(rfile->input, &status); 741da177e4SLinus Torvalds break; 751da177e4SLinus Torvalds default: 761da177e4SLinus Torvalds return -EINVAL; 771da177e4SLinus Torvalds } 781da177e4SLinus Torvalds if (err < 0) 791da177e4SLinus Torvalds return err; 801da177e4SLinus Torvalds 81d9e5582cSBaolin Wang compat_status = (struct compat_snd_rawmidi_status64) { 82d9e5582cSBaolin Wang .stream = status.stream, 83d9e5582cSBaolin Wang .tstamp_sec = status.tstamp_sec, 84d9e5582cSBaolin Wang .tstamp_nsec = status.tstamp_nsec, 85d9e5582cSBaolin Wang .avail = status.avail, 86d9e5582cSBaolin Wang .xruns = status.xruns, 87d9e5582cSBaolin Wang }; 88d9e5582cSBaolin Wang 89d9e5582cSBaolin Wang if (copy_to_user(src, &compat_status, sizeof(*src))) 901da177e4SLinus Torvalds return -EFAULT; 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds return 0; 931da177e4SLinus Torvalds } 941da177e4SLinus Torvalds 951da177e4SLinus Torvalds enum { 9648c9d417STakashi Iwai SNDRV_RAWMIDI_IOCTL_PARAMS32 = _IOWR('W', 0x10, struct snd_rawmidi_params32), 97d9e5582cSBaolin Wang SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT32 = _IOWR('W', 0x20, struct snd_rawmidi_status32), 98d9e5582cSBaolin Wang SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT64 = _IOWR('W', 0x20, struct compat_snd_rawmidi_status64), 991da177e4SLinus Torvalds }; 1001da177e4SLinus Torvalds 1011da177e4SLinus Torvalds static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg) 1021da177e4SLinus Torvalds { 10348c9d417STakashi Iwai struct snd_rawmidi_file *rfile; 1041da177e4SLinus Torvalds void __user *argp = compat_ptr(arg); 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds rfile = file->private_data; 1071da177e4SLinus Torvalds switch (cmd) { 1081da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_PVERSION: 1091da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_INFO: 1101da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_DROP: 1111da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_DRAIN: 1121da177e4SLinus Torvalds return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp); 1131da177e4SLinus Torvalds case SNDRV_RAWMIDI_IOCTL_PARAMS32: 1141da177e4SLinus Torvalds return snd_rawmidi_ioctl_params_compat(rfile, argp); 115d9e5582cSBaolin Wang case SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT32: 116d9e5582cSBaolin Wang return snd_rawmidi_ioctl_status32(rfile, argp); 117d9e5582cSBaolin Wang case SNDRV_RAWMIDI_IOCTL_STATUS_COMPAT64: 118d9e5582cSBaolin Wang return snd_rawmidi_ioctl_status_compat64(rfile, argp); 1191da177e4SLinus Torvalds } 1201da177e4SLinus Torvalds return -ENOIOCTLCMD; 1211da177e4SLinus Torvalds } 122