static int tun_chr_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct tun_struct *tun = (struct tun_struct *)file->private_data;
DBG(KERN_INFO "%s: tun_chr_ioctl\n", tun->name);
switch (cmd) {
case TUNSETIFF:
return tun_set_iff(tun, arg);
case TUNSETNOCSUM:
/* Disable/Enable checksum on net iface */
if (arg)
tun->flags |= TUN_NOCHECKSUM;
else
tun->flags &= ~TUN_NOCHECKSUM;
DBG(KERN_INFO "%s: checksum %s\n",
tun->name, arg ? "disabled" : "enabled");
break;
#ifdef TUN_DEBUG
case TUNSETDEBUG:
tun->debug = arg;
break;
#endif
default:
return -EINVAL;
};
return 0;
}
static int tun_chr_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct tun_struct *tun = (struct tun_struct *)file->private_data;
if (cmd == TUNSETIFF && !tun) {
struct ifreq ifr;
int err;
if (copy_from_user(&ifr, (void *)arg, sizeof(ifr)))
return -EFAULT;
ifr.ifr_name[IFNAMSIZ-1] = '\0';
rtnl_lock();
err = tun_set_iff(file, &ifr);
rtnl_unlock();
if (err)
return err;
copy_to_user((void *)arg, &ifr, sizeof(ifr));
return 0;
}
if (!tun)
return -EBADFD;
DBG(KERN_INFO "%s: tun_chr_ioctl cmd %d\n", tun->name, cmd);
switch (cmd) {
case TUNSETNOCSUM:
/* Disable/Enable checksum */
if (arg)
tun->flags |= TUN_NOCHECKSUM;
else
tun->flags &= ~TUN_NOCHECKSUM;
DBG(KERN_INFO "%s: checksum %s\n",
tun->name, arg ? "disabled" : "enabled");
break;
case TUNSETPERSIST:
/* Disable/Enable persist mode */
if (arg)
tun->flags |= TUN_PERSIST;
else
tun->flags &= ~TUN_PERSIST;
DBG(KERN_INFO "%s: persist %s\n",
tun->name, arg ? "disabled" : "enabled");
break;
case TUNSETOWNER:
/* Set owner of the device */
tun->owner = (uid_t) arg;
DBG(KERN_INFO "%s: owner set to %d\n", tun->owner);
break;
#ifdef TUN_DEBUG
case TUNSETDEBUG:
tun->debug = arg;
break;
#endif
default:
return -EINVAL;
};
return 0;
}
