mptcp: add mib for token creation fallback
If the MPTCP protocol is unable to create a new token,
the socket fallback to plain TCP, let's keep track
of such events via a specific MIB.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 171b775..3b50e8c 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -3224,8 +3224,10 @@ static int mptcp_stream_connect(struct socket *sock, struct sockaddr *uaddr,
if (rcu_access_pointer(tcp_sk(ssock->sk)->md5sig_info))
mptcp_subflow_early_fallback(msk, subflow);
#endif
- if (subflow->request_mptcp && mptcp_token_new_connect(ssock->sk))
+ if (subflow->request_mptcp && mptcp_token_new_connect(ssock->sk)) {
+ MPTCP_INC_STATS(sock_net(ssock->sk), MPTCP_MIB_TOKENFALLBACKINIT);
mptcp_subflow_early_fallback(msk, subflow);
+ }
do_connect:
err = ssock->ops->connect(ssock, uaddr, addr_len, flags);