Bluetooth: Split sending for HCI raw and control sockets

The sending functions for HCI raw and control sockets have nothing in
common except that they iterate over the socket list. Split them into
two so they can do their job more efficient. In addition the code becomes
more readable.

Signed-off-by: Marcel Holtmann <[e-mail]>
Signed-off-by: Johan Hedberg <[e-mail]>

include/net/bluetooth/hci_core.h

···
 void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data);
 
 /* ----- HCI Sockets ----- */
-void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb,
-							struct sock *skip_sk);
+void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb);
+void hci_send_to_control(struct sk_buff *skb, struct sock *skip_sk);
 
 /* Management interface */
 #define MGMT_ADDR_BREDR			0x00

net/bluetooth/hci_core.c

···
 		/* Time stamp */
 		__net_timestamp(skb);
 
-		hci_send_to_sock(hdev, skb, NULL);
+		hci_send_to_sock(hdev, skb);
 	}
 
 	/* Get rid of skb owner, prior to sending to the driver. */
···
 	while ((skb = skb_dequeue(&hdev->rx_q))) {
 		if (atomic_read(&hdev->promisc)) {
 			/* Send copy to the sockets */
-			hci_send_to_sock(hdev, skb, NULL);
+			hci_send_to_sock(hdev, skb);
 		}
 
 		if (test_bit(HCI_RAW, &hdev->flags)) {

net/bluetooth/hci_event.c

···
 
 	bt_cb(skb)->pkt_type = HCI_EVENT_PKT;
 	skb->dev = (void *) hdev;
-	hci_send_to_sock(hdev, skb, NULL);
+	hci_send_to_sock(hdev, skb);
 	kfree_skb(skb);
 }
 

net/bluetooth/hci_sock.c

···
 };
 
 /* Send frame to RAW socket */
-void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb,
-							struct sock *skip_sk)
+void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb)
 {
 	struct sock *sk;
 	struct hlist_node *node;
···
 	BT_DBG("hdev %p len %d", hdev, skb->len);
 
 	read_lock(&hci_sk_list.lock);
+
 	sk_for_each(sk, node, &hci_sk_list.head) {
 		struct hci_filter *flt;
 		struct sk_buff *nskb;
-
-		if (sk == skip_sk)
-			continue;
 
 		if (sk->sk_state != BT_BOUND || hci_pi(sk)->hdev != hdev)
 			continue;
···
 		if (skb->sk == sk)
 			continue;
 
-		if (bt_cb(skb)->channel != hci_pi(sk)->channel)
+		if (hci_pi(sk)->channel != HCI_CHANNEL_RAW)
 			continue;
-
-		if (bt_cb(skb)->channel == HCI_CHANNEL_CONTROL)
-			goto clone;
 
 		/* Apply filter */
 		flt = &hci_pi(sk)->filter;
···
 				continue;
 		}
 
-clone:
 		nskb = skb_clone(skb, GFP_ATOMIC);
 		if (!nskb)
 			continue;
 
 		/* Put type byte before the data */
-		if (bt_cb(skb)->channel == HCI_CHANNEL_RAW)
-			memcpy(skb_push(nskb, 1), &bt_cb(nskb)->pkt_type, 1);
+		memcpy(skb_push(nskb, 1), &bt_cb(nskb)->pkt_type, 1);
 
 		if (sock_queue_rcv_skb(sk, nskb))
 			kfree_skb(nskb);
 	}
+
+	read_unlock(&hci_sk_list.lock);
+}
+
+/* Send frame to control socket */
+void hci_send_to_control(struct sk_buff *skb, struct sock *skip_sk)
+{
+	struct sock *sk;
+	struct hlist_node *node;
+
+	BT_DBG("len %d", skb->len);
+
+	read_lock(&hci_sk_list.lock);
+
+	sk_for_each(sk, node, &hci_sk_list.head) {
+		struct sk_buff *nskb;
+
+		/* Skip the original socket */
+		if (sk == skip_sk)
+			continue;
+
+		if (sk->sk_state != BT_BOUND)
+			continue;
+
+		if (hci_pi(sk)->channel != HCI_CHANNEL_CONTROL)
+			continue;
+
+		nskb = skb_clone(skb, GFP_ATOMIC);
+		if (!nskb)
+			continue;
+
+		if (sock_queue_rcv_skb(sk, nskb))
+			kfree_skb(nskb);
+	}
+
 	read_unlock(&hci_sk_list.lock);
 }
 

net/bluetooth/mgmt.c

···
 	if (data)
 		memcpy(skb_put(skb, data_len), data, data_len);
 
-	hci_send_to_sock(NULL, skb, skip_sk);
+	hci_send_to_control(skb, skip_sk);
 	kfree_skb(skb);
 
 	return 0;