[MPTCP] [PATCH v2 1/4] mptcp: add and use subflow_write_space

This will be used to unblock tasks waiting for POLLOUT event once mptcp_poll is altered to not wait for each subflow anymore. Signed-off-by: Florian Westphal <fw(a)strlen.de&gt; --- net/mptcp/subflow.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c index 991198466c13..1f27a96d0439 100644 --- a/net/mptcp/subflow.c +++ b/net/mptcp/subflow.c @@ -610,6 +610,16 @@ static void subflow_data_ready(struct sock *sk) } } +static void subflow_write_space(struct sock *sk) +{ + struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk); + struct sock *parent = subflow->conn; + + sk_stream_write_space(sk); + if (parent) + sk_stream_write_space(parent); +} + int mptcp_subflow_connect(struct sock *sk, struct sockaddr *local, struct sockaddr *remote, u8 remote_id) { @@ -739,6 +749,7 @@ static int subflow_ulp_init(struct sock *sk) icsk->icsk_af_ops = &subflow_specific; ctx->tcp_sk_data_ready = sk->sk_data_ready; sk->sk_data_ready = subflow_data_ready; + sk->sk_write_space = subflow_write_space; out: return err; } -- 2.21.0