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Commit 43cbeee9 authored by Marcel Holtmann's avatar Marcel Holtmann
Browse files

[Bluetooth] Add support for TIOCOUTQ and TIOCINQ ioctls 



Almost every protocol family supports the TIOCOUTQ and TIOCINQ ioctls
and even Bluetooth could make use of them. When implementing audio
streaming and integration with GStreamer or PulseAudio they will allow
a better timing and synchronization.

Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 3241ad82

net/bluetooth/af_bluetooth.c

+23 −0
Original line number Original line Diff line number Diff line
@@ -335,11 +335,34 @@ EXPORT_SYMBOL(bt_sock_poll); 
int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)

int bt_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)

{

{

	struct sock *sk = sock->sk;

	struct sock *sk = sock->sk;

	struct sk_buff *skb;

	long amount;

	int err;

	int err;





	BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg);

	BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg);





	switch (cmd) {

	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:

	case SIOCGSTAMP:

		err = sock_get_timestamp(sk, (struct timeval __user *) arg);

		err = sock_get_timestamp(sk, (struct timeval __user *) arg);

		break;

		break;