From 8550f328f45db6d37981eb2041bc465810245c03 Mon Sep 17 00:00:00 2001 From: Lawrence Brakmo Date: Fri, 30 Jun 2017 20:02:42 -0700 Subject: bpf: Support for per connection SYN/SYN-ACK RTOs This patch adds support for setting a per connection SYN and SYN_ACK RTOs from within a BPF_SOCK_OPS program. For example, to set small RTOs when it is known both hosts are within a datacenter. Signed-off-by: Lawrence Brakmo Signed-off-by: David S. Miller --- include/net/tcp.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include/net/tcp.h') diff --git a/include/net/tcp.h b/include/net/tcp.h index e58500825006..564af2dee236 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -2057,4 +2057,15 @@ static inline int tcp_call_bpf(struct sock *sk, int op) } #endif +static inline u32 tcp_timeout_init(struct sock *sk) +{ + int timeout; + + timeout = tcp_call_bpf(sk, BPF_SOCK_OPS_TIMEOUT_INIT); + + if (timeout <= 0) + timeout = TCP_TIMEOUT_INIT; + return timeout; +} + #endif /* _TCP_H */ -- cgit v1.2.3