[Patch net-next 10/13] ipv6: introduce tracepoint trace_udpv6_rcv()
From: Cong Wang <hidden>
Date: 2021-08-05 18:58:12
Subsystem:
networking [general], the rest, tracing, user datagram protocol (udp) · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Steven Rostedt, Masami Hiramatsu, Willem de Bruijn
From: Qitao Xu <redacted> Tracepoint trace_udpv6_rcv() is introduced to trace skb at the entrance of UDPv6 layer on RX side. Reviewed-by: Cong Wang <redacted> Signed-off-by: Qitao Xu <redacted> --- include/trace/events/udp.h | 17 +++++++++++++++++ net/core/net-traces.c | 1 + net/ipv6/udp.c | 7 ++++++- 3 files changed, 24 insertions(+), 1 deletion(-)
diff --git a/include/trace/events/udp.h b/include/trace/events/udp.h
index 5008bdd546e8..01e026a3f542 100644
--- a/include/trace/events/udp.h
+++ b/include/trace/events/udp.h@@ -82,6 +82,23 @@ TRACE_EVENT(udp_v6_send_skb, TP_printk("skaddr=%px, skbaddr=%px", __entry->skaddr, __entry->skbaddr) ); + +TRACE_EVENT(udpv6_rcv, + + TP_PROTO(const struct sk_buff *skb), + + TP_ARGS(skb), + + TP_STRUCT__entry( + __field(const void *, skbaddr) + ), + + TP_fast_assign( + __entry->skbaddr = skb; + ), + + TP_printk("skbaddr=%px", __entry->skbaddr) +); #endif #endif /* _TRACE_UDP_H */
diff --git a/net/core/net-traces.c b/net/core/net-traces.c
index de5a13ae933c..83df315708ba 100644
--- a/net/core/net-traces.c
+++ b/net/core/net-traces.c@@ -65,4 +65,5 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(tcp_bad_csum); #if IS_ENABLED(CONFIG_IPV6) EXPORT_TRACEPOINT_SYMBOL_GPL(udp_v6_send_skb); EXPORT_TRACEPOINT_SYMBOL_GPL(ipv6_rcv); +EXPORT_TRACEPOINT_SYMBOL_GPL(udpv6_rcv); #endif
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 84895ca40e5c..1c8b36fe7218 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c@@ -1085,7 +1085,12 @@ INDIRECT_CALLABLE_SCOPE void udp_v6_early_demux(struct sk_buff *skb) INDIRECT_CALLABLE_SCOPE int udpv6_rcv(struct sk_buff *skb) { - return __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); + int ret; + + ret = __udp6_lib_rcv(skb, &udp_table, IPPROTO_UDP); + if (!ret) + trace_udpv6_rcv(skb); + return ret; } /*
--
2.27.0