Bluetooth: Add l2cap_chan_ops abstraction

Add an abstraction layer between L2CAP core and its users (only
l2cap_sock.c now). The first function implemented is new_connection() that
replaces calls to l2cap_sock_alloc() in l2cap_core.c

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

1 files changed, 27 insertions, 2 deletions

diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index 2f4fd5751a46..4050edeaf78b 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -31,6 +31,8 @@
 #include <net/bluetooth/l2cap.h>
 
 static const struct proto_ops l2cap_sock_ops;
+static void l2cap_sock_init(struct sock *sk, struct sock *parent);
+static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio);
 
 static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
 {
@@ -773,6 +775,25 @@ static int l2cap_sock_release(struct socket *sock)
         return err;
 }
 
+static struct l2cap_chan *l2cap_sock_new_connection_cb(void *data)
+{
+        struct sock *sk, *parent = data;
+
+        sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP,
+                                                                GFP_ATOMIC);
+        if (!sk)
+                return NULL;
+
+        l2cap_sock_init(sk, parent);
+
+        return l2cap_pi(sk)->chan;
+}
+
+static struct l2cap_ops l2cap_chan_ops = {
+        .name           = "L2CAP Socket Interface",
+        .new_connection = l2cap_sock_new_connection_cb,
+};
+
 static void l2cap_sock_destruct(struct sock *sk)
 {
         BT_DBG("sk %p", sk);
@@ -781,7 +802,7 @@ static void l2cap_sock_destruct(struct sock *sk)
         skb_queue_purge(&sk->sk_write_queue);
 }
 
-void l2cap_sock_init(struct sock *sk, struct sock *parent)
+static void l2cap_sock_init(struct sock *sk, struct sock *parent)
 {
         struct l2cap_pinfo *pi = l2cap_pi(sk);
         struct l2cap_chan *chan = pi->chan;
@@ -838,10 +859,14 @@ void l2cap_sock_init(struct sock *sk, struct sock *parent)
                 chan->force_reliable = 0;
                 chan->flushable = BT_FLUSHABLE_OFF;
                 chan->force_active = BT_POWER_FORCE_ACTIVE_ON;
+
         }
 
         /* Default config options */
         chan->flush_to = L2CAP_DEFAULT_FLUSH_TO;
+
+        chan->data = sk;
+        chan->ops = &l2cap_chan_ops;
 }
 
 static struct proto l2cap_proto = {
@@ -850,7 +875,7 @@ static struct proto l2cap_proto = {
         .obj_size       = sizeof(struct l2cap_pinfo)
 };
 
-struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio)
+static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio)
 {
         struct sock *sk;
         struct l2cap_chan *chan;