/* Write */
static ssize_t tun_chr_write(struct file * file, const char * buf,
size_t count, loff_t *pos)
{
struct tun_struct *tun = (struct tun_struct *)file->private_data;
DBG(KERN_INFO "%s: tun_chr_write %d\n", tun->name, count);
if (!(tun->flags & TUN_IFF_SET))
return -EBUSY;
if (verify_area(VERIFY_READ, buf, count))
return -EFAULT;
return tun_get_user(tun, buf, count);
}
/* Writev */
static ssize_t tun_chr_writev(struct file * file, const struct iovec *iv,
unsigned long count, loff_t *pos)
{
struct tun_struct *tun = (struct tun_struct *)file->private_data;
unsigned long i;
size_t len;
if (!tun)
return -EBADFD;
DBG(KERN_INFO "%s: tun_chr_write %d\n", tun->name, count);
for (i = 0, len = 0; i < count; i++) {
if (verify_area(VERIFY_READ, iv[i].iov_base, iv[i].iov_len))
return -EFAULT;
len += iv[i].iov_len;
}
return tun_get_user(tun, (struct iovec *) iv, len);
}
