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TOMOYO Linux Cross Reference
Linux/sound/core/hwdep_compat.c

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  1 /*
  2  *   32bit -> 64bit ioctl wrapper for hwdep API
  3  *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
  4  *
  5  *   This program is free software; you can redistribute it and/or modify
  6  *   it under the terms of the GNU General Public License as published by
  7  *   the Free Software Foundation; either version 2 of the License, or
  8  *   (at your option) any later version.
  9  *
 10  *   This program is distributed in the hope that it will be useful,
 11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 13  *   GNU General Public License for more details.
 14  *
 15  *   You should have received a copy of the GNU General Public License
 16  *   along with this program; if not, write to the Free Software
 17  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 18  *
 19  */
 20 
 21 /* This file is included from hwdep.c */
 22 
 23 #include <linux/compat.h>
 24 
 25 struct snd_hwdep_dsp_image32 {
 26         u32 index;
 27         unsigned char name[64];
 28         u32 image;      /* pointer */
 29         u32 length;
 30         u32 driver_data;
 31 } /* don't set packed attribute here */;
 32 
 33 static int snd_hwdep_dsp_load_compat(struct snd_hwdep *hw,
 34                                      struct snd_hwdep_dsp_image32 __user *src)
 35 {
 36         struct snd_hwdep_dsp_image __user *dst;
 37         compat_caddr_t ptr;
 38         u32 val;
 39 
 40         dst = compat_alloc_user_space(sizeof(*dst));
 41 
 42         /* index and name */
 43         if (copy_in_user(dst, src, 4 + 64))
 44                 return -EFAULT;
 45         if (get_user(ptr, &src->image) ||
 46             put_user(compat_ptr(ptr), &dst->image))
 47                 return -EFAULT;
 48         if (get_user(val, &src->length) ||
 49             put_user(val, &dst->length))
 50                 return -EFAULT;
 51         if (get_user(val, &src->driver_data) ||
 52             put_user(val, &dst->driver_data))
 53                 return -EFAULT;
 54 
 55         return snd_hwdep_dsp_load(hw, dst);
 56 }
 57 
 58 enum {
 59         SNDRV_HWDEP_IOCTL_DSP_LOAD32   = _IOW('H', 0x03, struct snd_hwdep_dsp_image32)
 60 };
 61 
 62 static long snd_hwdep_ioctl_compat(struct file * file, unsigned int cmd,
 63                                    unsigned long arg)
 64 {
 65         struct snd_hwdep *hw = file->private_data;
 66         void __user *argp = compat_ptr(arg);
 67         switch (cmd) {
 68         case SNDRV_HWDEP_IOCTL_PVERSION:
 69         case SNDRV_HWDEP_IOCTL_INFO:
 70         case SNDRV_HWDEP_IOCTL_DSP_STATUS:
 71                 return snd_hwdep_ioctl(file, cmd, (unsigned long)argp);
 72         case SNDRV_HWDEP_IOCTL_DSP_LOAD32:
 73                 return snd_hwdep_dsp_load_compat(hw, argp);
 74         }
 75         if (hw->ops.ioctl_compat)
 76                 return hw->ops.ioctl_compat(hw, file, cmd, arg);
 77         return -ENOIOCTLCMD;
 78 }
 79 

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