[PATCH net-next 5/6] tcp: add tracepoint trace_tcp_destroy_sock

[Song Liu]

This patch adds trace event trace_tcp_destroy_sock.

Signed-off-by: Song Liu <songliubrav...@fb.com>
---
 include/trace/events/tcp.h | 7 +++++++
 net/ipv4/tcp_ipv4.c        | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/include/trace/events/tcp.h b/include/trace/events/tcp.h
index c83c711..1724c12 100644
--- a/include/trace/events/tcp.h
+++ b/include/trace/events/tcp.h
@@ -154,6 +154,13 @@ DEFINE_EVENT(tcp_event_sk, tcp_receive_reset,
        TP_ARGS(sk)
 );
 
+DEFINE_EVENT(tcp_event_sk, tcp_destroy_sock,
+
+       TP_PROTO(const struct sock *sk),
+
+       TP_ARGS(sk)
+);
+
 #endif /* _TRACE_TCP_H */
 
 /* This part must be outside protection */
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index aa99d9d..736753a 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1865,6 +1865,8 @@ void tcp_v4_destroy_sock(struct sock *sk)
 {
        struct tcp_sock *tp = tcp_sk(sk);
 
+       trace_tcp_destroy_sock(sk);
+
        tcp_clear_xmit_timers(sk);
 
        tcp_cleanup_congestion_control(sk);
-- 
2.9.5