+int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ struct sock *sk = sock->sk;
+ struct sk_buff *skb;
+ long amount;
+ int err;
+
+ BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg);
+
+ switch (cmd) {
+ case TIOCOUTQ:
+ if (sk->sk_state == BT_LISTEN)
+ return -EINVAL;
+
+ amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);
+ if (amount < 0)
+ amount = 0;
+ err = put_user(amount, (int __user *) arg);
+ break;
+
+ case TIOCINQ:
+ if (sk->sk_state == BT_LISTEN)
+ return -EINVAL;
+
+ lock_sock(sk);
+ skb = skb_peek(&sk->sk_receive_queue);
+ amount = skb ? skb->len : 0;
+ release_sock(sk);
+ err = put_user(amount, (int __user *) arg);
+ break;
+
+ case SIOCGSTAMP:
+ err = sock_get_timestamp(sk, (struct timeval __user *) arg);
+ break;
+
+ case SIOCGSTAMPNS:
+ err = sock_get_timestampns(sk, (struct timespec __user *) arg);
+ break;
+
+ default:
+ err = -ENOIOCTLCMD;
+ break;
+ }
+
+ return err;
+}
+EXPORT_SYMBOL(bt_sock_ioctl);
+