From 1536e2857bd38e3bcd19963fd6b3c3287b4747c4 Mon Sep 17 00:00:00 2001 From: Kenjiro Nakayama Date: Thu, 17 Apr 2014 01:25:01 +0900 Subject: [PATCH] tcp: Add a TCP_FASTOPEN socket option to get a max backlog on its listner This patch adds a TCP_FASTOPEN socket option to get a max backlog on its listener to getsockopt(). Signed-off-by: Kenjiro Nakayama Acked-by: Neal Cardwell Signed-off-by: David S. Miller --- net/ipv4/tcp.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 4bd6d52eeffb..eb1dde37e678 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -2916,6 +2916,14 @@ static int do_tcp_getsockopt(struct sock *sk, int level, case TCP_USER_TIMEOUT: val = jiffies_to_msecs(icsk->icsk_user_timeout); break; + + case TCP_FASTOPEN: + if (icsk->icsk_accept_queue.fastopenq != NULL) + val = icsk->icsk_accept_queue.fastopenq->max_qlen; + else + val = 0; + break; + case TCP_TIMESTAMP: val = tcp_time_stamp + tp->tsoffset; break; -- 2.11.0