Bluetooth: Add chan->ops->set_shutdown()

We need to remove all direct access of struct sock from L2CAP core.
This change is pretty simple and just add a new L2CAP channel callback to
do the work in the L2CAP socket side.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h
index 9c6be72..ae3a99b 100644 (file)
--- a/include/net/bluetooth/l2cap.h
+++ b/include/net/bluetooth/l2cap.h
@@ -555,6 +555,7 @@ struct l2cap_ops {
        void                    (*ready) (struct l2cap_chan *chan);
        void                    (*defer) (struct l2cap_chan *chan);
        void                    (*resume) (struct l2cap_chan *chan);
+       void                    (*set_shutdown) (struct l2cap_chan *chan);
        long                    (*get_sndtimeo) (struct l2cap_chan *chan);
        struct sk_buff          *(*alloc_skb) (struct l2cap_chan *chan,
                                               unsigned long len, int nb);
@@ -796,6 +797,10 @@ static inline void l2cap_chan_no_defer(struct l2cap_chan *chan)
 {
 }
 
+static inline void l2cap_chan_no_set_shutdown(struct l2cap_chan *chan)
+{
+}
+
 static inline long l2cap_chan_no_get_sndtimeo(struct l2cap_chan *chan)
 {
        return 0;

diff --git a/net/bluetooth/a2mp.c b/net/bluetooth/a2mp.c
index 1e99210..74c1477 100644 (file)
--- a/net/bluetooth/a2mp.c
+++ b/net/bluetooth/a2mp.c
@@ -710,6 +710,7 @@ static struct l2cap_ops a2mp_chan_ops = {
        .teardown = l2cap_chan_no_teardown,
        .ready = l2cap_chan_no_ready,
        .defer = l2cap_chan_no_defer,
+       .set_shutdown = l2cap_chan_no_set_shutdown,
        .get_sndtimeo = l2cap_chan_no_get_sndtimeo,
 };
 

diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index c6334fc..634781a 100644 (file)
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -4241,7 +4241,6 @@ static inline int l2cap_disconnect_req(struct l2cap_conn *conn,
        struct l2cap_disconn_rsp rsp;
        u16 dcid, scid;
        struct l2cap_chan *chan;
-       struct sock *sk;
 
        if (cmd_len != sizeof(*req))
                return -EPROTO;
@@ -4261,15 +4260,11 @@ static inline int l2cap_disconnect_req(struct l2cap_conn *conn,
 
        l2cap_chan_lock(chan);
 
-       sk = chan->sk;
-
        rsp.dcid = cpu_to_le16(chan->scid);
        rsp.scid = cpu_to_le16(chan->dcid);
        l2cap_send_cmd(conn, cmd->ident, L2CAP_DISCONN_RSP, sizeof(rsp), &rsp);
 
-       lock_sock(sk);
-       sk->sk_shutdown = SHUTDOWN_MASK;
-       release_sock(sk);
+       chan->ops->set_shutdown(chan);
 
        l2cap_chan_hold(chan);
        l2cap_chan_del(chan, ECONNRESET);

diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index ffa78d3..301f25b 100644 (file)
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -1136,6 +1136,15 @@ static void l2cap_sock_resume_cb(struct l2cap_chan *chan)
        sk->sk_state_change(sk);
 }
 
+static void l2cap_sock_set_shutdown_cb(struct l2cap_chan *chan)
+{
+       struct sock *sk = chan->data;
+
+       lock_sock(sk);
+       sk->sk_shutdown = SHUTDOWN_MASK;
+       release_sock(sk);
+}
+
 static long l2cap_sock_get_sndtimeo_cb(struct l2cap_chan *chan)
 {
        struct sock *sk = chan->data;
@@ -1153,6 +1162,7 @@ static struct l2cap_ops l2cap_chan_ops = {
        .ready          = l2cap_sock_ready_cb,
        .defer          = l2cap_sock_defer_cb,
        .resume         = l2cap_sock_resume_cb,
+       .set_shutdown   = l2cap_sock_set_shutdown_cb,
        .get_sndtimeo   = l2cap_sock_get_sndtimeo_cb,
        .alloc_skb      = l2cap_sock_alloc_skb_cb,
 };