cregit-Linux how code gets into the kernel

Release 4.8 sound/core/rawmidi_compat.c

Directory: sound/core
/*
 *   32bit -> 64bit ioctl wrapper for raw MIDI API
 *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

/* This file included from rawmidi.c */

#include <linux/compat.h>


struct snd_rawmidi_params32 {
	
s32 stream;
	
u32 buffer_size;
	
u32 avail_min;
	
unsigned int no_active_sensing; /* avoid bit-field */
	
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, &params); case SNDRV_RAWMIDI_STREAM_INPUT: return snd_rawmidi_input_params(rfile->input, &params); } return -EINVAL; }

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jaroslav kyselajaroslav kysela13096.30%150.00%
takashi iwaitakashi iwai53.70%150.00%
Total135100.00%2100.00%

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 (compat_put_timespec(&status.tstamp, &src->tstamp) || put_user(status.avail, &src->avail) || put_user(status.xruns, &src->xruns)) return -EFAULT; return 0; }

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jaroslav kyselajaroslav kysela14896.10%133.33%
takashi iwaitakashi iwai63.90%266.67%
Total154100.00%3100.00%

#ifdef CONFIG_X86_X32 /* X32 ABI has 64bit timespec and 64bit alignment */ struct snd_rawmidi_status_x32 { s32 stream; u32 rsvd; /* alignment */ struct timespec tstamp; u32 avail; u32 xruns; unsigned char reserved[16]; } __attribute__((packed)); #define put_timespec(src, dst) copy_to_user(dst, src, sizeof(*dst))
static int snd_rawmidi_ioctl_status_x32(struct snd_rawmidi_file *rfile, struct snd_rawmidi_status_x32 __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_timespec(&status.tstamp, &src->tstamp) || put_user(status.avail, &src->avail) || put_user(status.xruns, &src->xruns)) return -EFAULT; return 0; }

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takashi iwaitakashi iwai154100.00%1100.00%
Total154100.00%1100.00%

#endif /* CONFIG_X86_X32 */ enum { SNDRV_RAWMIDI_IOCTL_PARAMS32 = _IOWR('W', 0x10, struct snd_rawmidi_params32), SNDRV_RAWMIDI_IOCTL_STATUS32 = _IOWR('W', 0x20, struct snd_rawmidi_status32), #ifdef CONFIG_X86_X32 SNDRV_RAWMIDI_IOCTL_STATUS_X32 = _IOWR('W', 0x20, struct snd_rawmidi_status_x32), #endif /* CONFIG_X86_X32 */ };
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); #ifdef CONFIG_X86_X32 case SNDRV_RAWMIDI_IOCTL_STATUS_X32: return snd_rawmidi_ioctl_status_x32(rfile, argp); #endif /* CONFIG_X86_X32 */ } return -ENOIOCTLCMD; }

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jaroslav kyselajaroslav kysela9683.48%133.33%
takashi iwaitakashi iwai1916.52%266.67%
Total115100.00%3100.00%


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jaroslav kyselajaroslav kysela46464.18%125.00%
takashi iwaitakashi iwai25935.82%375.00%
Total723100.00%4100.00%
Directory: sound/core
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