Many sub-modules like HIDP get l2cap sockets as input from user-space but
need access to the hci_conn to properly track the connection. This helper
returns a reference to the current hci_conn of a given l2cap-socket. If
the socket is not connected, NULL is returned.
Signed-off-by: David Herrmann <dh.herrmann@xxxxxxxxx>
---
include/net/bluetooth/l2cap.h | 1 +
net/bluetooth/l2cap_sock.c | 21 +++++++++++++++++++++
2 files changed, 22 insertions(+)
diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h
index db6694f..f0f9875 100644
--- a/include/net/bluetooth/l2cap.h
+++ b/include/net/bluetooth/l2cap.h
@@ -788,6 +788,7 @@ extern bool disable_ertm;
int l2cap_init_sockets(void);
void l2cap_cleanup_sockets(void);
bool l2cap_is_socket(struct socket *sock);
+struct hci_conn *l2cap_sock_get_hci_conn(struct socket *sock);
void __l2cap_connect_rsp_defer(struct l2cap_chan *chan);
int __l2cap_wait_ack(struct sock *sk);
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index 461e8bc..75de59f 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -49,6 +49,27 @@ bool l2cap_is_socket(struct socket *sock)
}
EXPORT_SYMBOL(l2cap_is_socket);
+struct hci_conn *l2cap_sock_get_hci_conn(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+ struct l2cap_chan *chan = l2cap_pi(sk)->chan;
+ struct hci_conn *hcon;
+
+ l2cap_chan_lock(chan);
+
+ if (chan->conn) {
+ hcon = chan->conn->hcon;
+ hci_conn_get(hcon);
+ } else {
+ hcon = NULL;
+ }
+
+ l2cap_chan_unlock(chan);
+
+ return hcon;
+}
+EXPORT_SYMBOL(l2cap_sock_get_hci_conn);
+
static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
{
struct sock *sk = sock->sk;
--
1.8.2
--
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