Bluetooth: Preparation for usage of SOL_BLUETOOTH

The socket option levels SOL_L2CAP, SOL_RFOMM and SOL_SCO are currently
in use by various Bluetooth applications. Going forward the common
option level SOL_BLUETOOTH should be used. This patch prepares the clean
split of the old and new option levels while keeping everything backward
compatibility.

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

1 files changed, 49 insertions, 2 deletions

diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c
index ce505f2a755..65dd7133d72 100644
--- a/net/bluetooth/rfcomm/sock.c
+++ b/net/bluetooth/rfcomm/sock.c
@@ -713,7 +713,7 @@ out:
 	return copied ? : err;
 }
 
-static int rfcomm_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen)
+static int rfcomm_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, int optlen)
 {
 	struct sock *sk = sock->sk;
 	int err = 0;
@@ -742,7 +742,29 @@ static int rfcomm_sock_setsockopt(struct socket *sock, int level, int optname, c
 	return err;
 }
 
-static int rfcomm_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
+static int rfcomm_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen)
+{
+	struct sock *sk = sock->sk;
+	int err = 0;
+
+	BT_DBG("sk %p", sk);
+
+	if (level == SOL_RFCOMM)
+		return rfcomm_sock_setsockopt_old(sock, optname, optval, optlen);
+
+	lock_sock(sk);
+
+	switch (optname) {
+	default:
+		err = -ENOPROTOOPT;
+		break;
+	}
+
+	release_sock(sk);
+	return err;
+}
+
+static int rfcomm_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen)
 {
 	struct sock *sk = sock->sk;
 	struct sock *l2cap_sk;
@@ -788,6 +810,31 @@ static int rfcomm_sock_getsockopt(struct socket *sock, int level, int optname, c
 	return err;
 }
 
+static int rfcomm_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
+{
+	struct sock *sk = sock->sk;
+	int len, err = 0;
+
+	BT_DBG("sk %p", sk);
+
+	if (level == SOL_RFCOMM)
+		return rfcomm_sock_getsockopt_old(sock, optname, optval, optlen);
+
+	if (get_user(len, optlen))
+		return -EFAULT;
+
+	lock_sock(sk);
+
+	switch (optname) {
+	default:
+		err = -ENOPROTOOPT;
+		break;
+	}
+
+	release_sock(sk);
+	return err;
+}
+
 static int rfcomm_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 {
 	struct sock *sk __maybe_unused = sock->sk;