Bluetooth: Create generic queue_monitor_skb helper function

The hci_send_to_monitor function contains generic code for queueing the
packet into the receive queue of every monitor client. To avoid code
duplication, create a generic queue_monitor_skb function to interate
over all monitor sockets.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

net/bluetooth/hci_sock.c

@@ -216,10 +216,37 @@ void hci_send_to_control(struct sk_buff *skb, struct sock *skip_sk)
 	read_unlock(&hci_sk_list.lock);
 }
 
+static void queue_monitor_skb(struct sk_buff *skb)
+{
+	struct sock *sk;
+
+	BT_DBG("len %d", skb->len);
+
+	read_lock(&hci_sk_list.lock);
+
+	sk_for_each(sk, &hci_sk_list.head) {
+		struct sk_buff *nskb;
+
+		if (sk->sk_state != BT_BOUND)
+			continue;
+
+		if (hci_pi(sk)->channel != HCI_CHANNEL_MONITOR)
+			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);
+}
+
 /* Send frame to monitor socket */
 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb)
 {
-	struct sock *sk;
 	struct sk_buff *skb_copy = NULL;
 	struct hci_mon_hdr *hdr;
 	__le16 opcode;
@@ -263,27 +290,7 @@ void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb)
 	hdr->index = cpu_to_le16(hdev->id);
 	hdr->len = cpu_to_le16(skb->len);
 
-	read_lock(&hci_sk_list.lock);
-
-	sk_for_each(sk, &hci_sk_list.head) {
-		struct sk_buff *nskb;
-
-		if (sk->sk_state != BT_BOUND)
-			continue;
-
-		if (hci_pi(sk)->channel != HCI_CHANNEL_MONITOR)
-			continue;
-
-		nskb = skb_clone(skb_copy, GFP_ATOMIC);
-		if (!nskb)
-			continue;
-
-		if (sock_queue_rcv_skb(sk, nskb))
-			kfree_skb(nskb);
-	}
-
-	read_unlock(&hci_sk_list.lock);
-
+	queue_monitor_skb(skb_copy);
 	kfree_skb(skb_copy);
 }