Bluetooth: Add RFCOMM option to use L2CAP ERTM mode

By default the RFCOMM layer would still use L2CAP basic mode. For testing
purposes this option enables RFCOMM to select enhanced retransmission
mode.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/net/bluetooth/rfcomm/core.c b/net/bluetooth/rfcomm/core.c
index 25692bc0a3423bb78058a9bde2b8e2479eee5b3e..fc5ee3296e224f4144a08ddc2ba0f01bb6b31895 100644 (file)
--- a/net/bluetooth/rfcomm/core.c
+++ b/net/bluetooth/rfcomm/core.c
@@ -51,6 +51,7 @@
 static int disable_cfc = 0;
 static int channel_mtu = -1;
 static unsigned int l2cap_mtu = RFCOMM_MAX_L2CAP_MTU;
+static int l2cap_ertm = 0;
 
 static struct task_struct *rfcomm_thread;
 
@@ -702,6 +703,8 @@ static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src, bdaddr_t *dst
        sk = sock->sk;
        lock_sock(sk);
        l2cap_pi(sk)->imtu = l2cap_mtu;
+       if (l2cap_ertm)
+               l2cap_pi(sk)->mode = L2CAP_MODE_ERTM;
        release_sock(sk);
 
        s = rfcomm_session_add(sock, BT_BOUND);
@@ -2185,6 +2188,9 @@ MODULE_PARM_DESC(channel_mtu, "Default MTU for the RFCOMM channel");
 module_param(l2cap_mtu, uint, 0644);
 MODULE_PARM_DESC(l2cap_mtu, "Default MTU for the L2CAP connection");
 
+module_param(l2cap_ertm, bool, 0644);
+MODULE_PARM_DESC(l2cap_ertm, "Use L2CAP ERTM mode for connection");
+
 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>");
 MODULE_DESCRIPTION("Bluetooth RFCOMM ver " VERSION);
 MODULE_VERSION(VERSION);