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- #include <linux/compat.h>
- struct snd_rawmidi_params32 {
- s32 stream;
- u32 buffer_size;
- u32 avail_min;
- unsigned int no_active_sensing;
- unsigned char reserved[16];
- } __attribute__((packed));
- static int snd_rawmidi_ioctl_params_compat(struct snd_rawmidi_file *rfile,
- struct snd_rawmidi_params32 __user *src)
- {
- struct snd_rawmidi_params params;
- unsigned int val;
- if (rfile->output == NULL)
- return -EINVAL;
- if (get_user(params.stream, &src->stream) ||
- get_user(params.buffer_size, &src->buffer_size) ||
- get_user(params.avail_min, &src->avail_min) ||
- get_user(val, &src->no_active_sensing))
- return -EFAULT;
- params.no_active_sensing = val;
- switch (params.stream) {
- case SNDRV_RAWMIDI_STREAM_OUTPUT:
- return snd_rawmidi_output_params(rfile->output, ¶ms);
- case SNDRV_RAWMIDI_STREAM_INPUT:
- return snd_rawmidi_input_params(rfile->input, ¶ms);
- }
- return -EINVAL;
- }
- struct snd_rawmidi_status32 {
- s32 stream;
- struct compat_timespec tstamp;
- u32 avail;
- u32 xruns;
- unsigned char reserved[16];
- } __attribute__((packed));
- static int snd_rawmidi_ioctl_status_compat(struct snd_rawmidi_file *rfile,
- struct snd_rawmidi_status32 __user *src)
- {
- int err;
- struct snd_rawmidi_status status;
- if (rfile->output == NULL)
- return -EINVAL;
- if (get_user(status.stream, &src->stream))
- return -EFAULT;
- switch (status.stream) {
- case SNDRV_RAWMIDI_STREAM_OUTPUT:
- err = snd_rawmidi_output_status(rfile->output, &status);
- break;
- case SNDRV_RAWMIDI_STREAM_INPUT:
- err = snd_rawmidi_input_status(rfile->input, &status);
- break;
- default:
- return -EINVAL;
- }
- if (err < 0)
- return err;
- if (put_user(status.tstamp.tv_sec, &src->tstamp.tv_sec) ||
- put_user(status.tstamp.tv_nsec, &src->tstamp.tv_nsec) ||
- put_user(status.avail, &src->avail) ||
- put_user(status.xruns, &src->xruns))
- return -EFAULT;
- return 0;
- }
- enum {
- SNDRV_RAWMIDI_IOCTL_PARAMS32 = _IOWR('W', 0x10, struct snd_rawmidi_params32),
- SNDRV_RAWMIDI_IOCTL_STATUS32 = _IOWR('W', 0x20, struct snd_rawmidi_status32),
- };
- static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
- {
- struct snd_rawmidi_file *rfile;
- void __user *argp = compat_ptr(arg);
- rfile = file->private_data;
- switch (cmd) {
- case SNDRV_RAWMIDI_IOCTL_PVERSION:
- case SNDRV_RAWMIDI_IOCTL_INFO:
- case SNDRV_RAWMIDI_IOCTL_DROP:
- case SNDRV_RAWMIDI_IOCTL_DRAIN:
- return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp);
- case SNDRV_RAWMIDI_IOCTL_PARAMS32:
- return snd_rawmidi_ioctl_params_compat(rfile, argp);
- case SNDRV_RAWMIDI_IOCTL_STATUS32:
- return snd_rawmidi_ioctl_status_compat(rfile, argp);
- }
- return -ENOIOCTLCMD;
- }
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