[Patch net-next 08/13] ipv4: introduce tracepoint trace_ip_local_deliver_finish()
From: Cong Wang <hidden>
Date: 2021-08-05 18:58:09
Subsystem:
networking [general], networking [ipv4/ipv6], the rest, tracing · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Ahern, Ido Schimmel, Linus Torvalds, Steven Rostedt, Masami Hiramatsu
From: Qitao Xu <redacted> Tracepoint trace_ip_local_deliver_finish() is introduced to trace skb at the exit of IP layer on RX side. Reviewed-by: Cong Wang <redacted> Signed-off-by: Qitao Xu <redacted> --- include/trace/events/ip.h | 17 +++++++++++++++++ net/ipv4/ip_input.c | 7 ++++++- 2 files changed, 23 insertions(+), 1 deletion(-)
diff --git a/include/trace/events/ip.h b/include/trace/events/ip.h
index 6cd0907728ce..9653bc3c7fa0 100644
--- a/include/trace/events/ip.h
+++ b/include/trace/events/ip.h@@ -117,6 +117,23 @@ TRACE_EVENT(ipv6_rcv, ); #endif +TRACE_EVENT(ip_local_deliver_finish, + + 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 /* _TRACE_IP_H */ /* This part must be outside protection */
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index 2eb7a0cbc0d3..31c5c6903fff 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c@@ -244,15 +244,20 @@ int ip_local_deliver(struct sk_buff *skb) * Reassemble IP fragments. */ struct net *net = dev_net(skb->dev); + int ret; if (ip_is_fragment(ip_hdr(skb))) { if (ip_defrag(net, skb, IP_DEFRAG_LOCAL_DELIVER)) return 0; } - return NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_IN, + ret = NF_HOOK(NFPROTO_IPV4, NF_INET_LOCAL_IN, net, NULL, skb, skb->dev, NULL, ip_local_deliver_finish); + if (!ret) + trace_ip_local_deliver_finish(skb); + return ret; + } EXPORT_SYMBOL(ip_local_deliver);
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2.27.0