From: Song Liu <songliubrav...@fb.com> Date: Mon, 30 Oct 2017 14:41:35 -0700
> This tracepoint can be used to trace synack retransmits. It maintains > pointer to struct request_sock. > > We cannot simply reuse trace_tcp_retransmit_skb() here, because the > sk here is the LISTEN socket. The IP addresses and ports should be > extracted from struct request_sock. > > Note that, like many other tracepoints, this patch uses IS_ENABLED > in TP_fast_assign macro, which triggers sparse warning like: > > ./include/trace/events/tcp.h:274:1: error: directive in argument list > ./include/trace/events/tcp.h:281:1: error: directive in argument list > > However, there is no good solution to avoid these warnings. To the > best of our knowledge, these warnings are harmless. > > Signed-off-by: Song Liu <songliubrav...@fb.com> > Acked-by: Alexei Starovoitov <a...@kernel.org> > Acked-by: Martin KaFai Lau <ka...@fb.com> Applied.
