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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 <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Marcel Holtmann 2012-02-20 14:50:30 +01:00 committed by Johan Hedberg
parent 48c7aba91f
commit 470fe1b540
5 changed files with 45 additions and 18 deletions
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4
include/net/bluetooth/hci_core.h
View File

@ -953,8 +953,8 @@ void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
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

4
net/bluetooth/hci_core.c
View File

@ -2131,7 +2131,7 @@ static int hci_send_frame(struct sk_buff *skb)
/* 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. */
@ -2818,7 +2818,7 @@ static void hci_rx_work(struct work_struct *work)
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)) {

2
net/bluetooth/hci_event.c
View File

@ -3571,7 +3571,7 @@ void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data)
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);
}

51
net/bluetooth/hci_sock.c
View File

@ -85,8 +85,7 @@ static struct bt_sock_list hci_sk_list = {
};
/* 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;
@ -94,13 +93,11 @@ void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb,
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;
@ -108,12 +105,9 @@ void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb,
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;
@ -137,18 +131,51 @@ void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb,
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);
}

2
net/bluetooth/mgmt.c
View File

@ -924,7 +924,7 @@ static int mgmt_event(u16 event, struct hci_dev *hdev, void *data,
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;