[Patch net-next 12/13] ipv6: introduce tracepoint trace_tcp_v6_rcv()
flat view
STALE1892d
REVIEWED: 1 (0M)
From: Cong Wang <hidden>
Date: 2021-08-05 18:58:16
Subsystem:
networking [general], networking [tcp], the rest, tracing · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Neal Cardwell, Linus Torvalds, Steven Rostedt, Masami Hiramatsu
1 review trailer.
From: Qitao Xu <redacted> Tracepoint trace_tcp_v6_rcv() is introduced to trace skb at the entrance of TCPv6 on RX side. Reviewed-by: Cong Wang <redacted> Signed-off-by: Qitao Xu <redacted> --- include/trace/events/tcp.h | 9 +++++++++ net/core/net-traces.c | 1 + net/ipv6/tcp_ipv6.c | 3 +++ 3 files changed, 13 insertions(+)
diff --git a/include/trace/events/tcp.h b/include/trace/events/tcp.h
index adf84866dee9..f788ac43c4bf 100644
--- a/include/trace/events/tcp.h
+++ b/include/trace/events/tcp.h@@ -116,6 +116,15 @@ DEFINE_EVENT(tcp_event_sk_skb, tcp_v4_rcv, TP_ARGS(sk, skb) ); +#if IS_ENABLED(CONFIG_IPV6) +DEFINE_EVENT(tcp_event_sk_skb, tcp_v6_rcv, + + TP_PROTO(const struct sock *sk, const struct sk_buff *skb), + + TP_ARGS(sk, skb) +); +#endif + /* * skb of trace_tcp_send_reset is the skb that caused RST. In case of * active reset, skb should be NULL
diff --git a/net/core/net-traces.c b/net/core/net-traces.c
index 83df315708ba..e0840efe479a 100644
--- a/net/core/net-traces.c
+++ b/net/core/net-traces.c@@ -66,4 +66,5 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(tcp_bad_csum); EXPORT_TRACEPOINT_SYMBOL_GPL(udp_v6_send_skb); EXPORT_TRACEPOINT_SYMBOL_GPL(ipv6_rcv); EXPORT_TRACEPOINT_SYMBOL_GPL(udpv6_rcv); +EXPORT_TRACEPOINT_SYMBOL_GPL(tcp_v6_rcv); #endif
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 0ce52d46e4f8..eb9586d798b7 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c@@ -1765,6 +1765,9 @@ INDIRECT_CALLABLE_SCOPE int tcp_v6_rcv(struct sk_buff *skb) bh_unlock_sock(sk); if (skb_to_free) __kfree_skb(skb_to_free); + if (!ret) + trace_tcp_v6_rcv(sk, skb); + put_and_return: if (refcounted) sock_put(sk);
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2.27.0