mptcp: add and use mptcp_data_ready helper

allows us to schedule the work queue to drain the ssk receive queue in
a followup patch.

This is needed to avoid sending all-to-pessimistic mptcp-level
acknowledgements.  At this time, the ack_seq is what was last read by
userspace instead of the highest in-sequence number queued for reading.

Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/net/mptcp/protocol.h b/net/mptcp/protocol.h
index 9f8663b30456..67895a7c1e5b 100644
--- a/net/mptcp/protocol.h
+++ b/net/mptcp/protocol.h
@@ -201,6 +201,7 @@ void mptcp_get_options(const struct sk_buff *skb,
 		       struct tcp_options_received *opt_rx);
 
 void mptcp_finish_connect(struct sock *sk);
+void mptcp_data_ready(struct sock *sk);
 
 int mptcp_token_new_request(struct request_sock *req);
 void mptcp_token_destroy_request(u32 token);