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authorMarcel Holtmann <marcel@holtmann.org>2008-07-14 18:13:51 (GMT)
committerMarcel Holtmann <marcel@holtmann.org>2008-07-14 18:13:51 (GMT)
commit43cbeee9f9b26300275e4e2d55ed1607f8c5f760 (patch)
tree42ca68acb1043291df2015be01b81c09eeb5fb80 /net/bluetooth
parent3241ad820dbb172021e0268b5611031991431626 (diff)
downloadlinux-43cbeee9f9b26300275e4e2d55ed1607f8c5f760.tar.xz
[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: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/bluetooth')
-rw-r--r--net/bluetooth/af_bluetooth.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/net/bluetooth/af_bluetooth.c b/net/bluetooth/af_bluetooth.c
index 88afe25..77fe9b8 100644
--- a/net/bluetooth/af_bluetooth.c
+++ b/net/bluetooth/af_bluetooth.c
@@ -335,11 +335,34 @@ EXPORT_SYMBOL(bt_sock_poll);
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;