diff mbox series

[net-next,06/13] ipv4: introduce tracepoint trace_ip_rcv()

Message ID 20210805185750.4522-7-xiyou.wangcong@gmail.com (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series net: add more tracepoints to TCP/IP stack | expand

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Context Check Description
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netdev/cc_maintainers warning 6 maintainers not CCed: mingo@redhat.com dsahern@kernel.org davem@davemloft.net rostedt@goodmis.org kuba@kernel.org yoshfuji@linux-ipv6.org
netdev/source_inline success Was 0 now: 0
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netdev/module_param success Was 0 now: 0
netdev/build_32bit success Errors and warnings before: 3 this patch: 3
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/verify_fixes success Link
netdev/checkpatch warning CHECK: Alignment should match open parenthesis CHECK: Lines should not end with a '(' WARNING: Using vsprintf specifier '%px' potentially exposes the kernel memory layout, if you don't really need the address please consider using '%p'.
netdev/build_allmodconfig_warn success Errors and warnings before: 3 this patch: 3
netdev/header_inline success Link

Commit Message

Cong Wang Aug. 5, 2021, 6:57 p.m. UTC 
From: Qitao Xu <qitao.xu@bytedance.com>

Tracepoint trace_ip_rcv() is introduced to trace skb at the
entrance of IP layer on RX side.

Reviewed-by: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: Qitao Xu <qitao.xu@bytedance.com>
---
 include/trace/events/ip.h | 16 ++++++++++++++++
 net/ipv4/ip_input.c       |  2 ++
 2 files changed, 18 insertions(+)
diff mbox series

Patch

diff --git a/include/trace/events/ip.h b/include/trace/events/ip.h
index 553ae7276732..20ee1a81405c 100644
--- a/include/trace/events/ip.h
+++ b/include/trace/events/ip.h
@@ -83,6 +83,22 @@  TRACE_EVENT(ip_queue_xmit,
 		  __entry->saddr_v6, __entry->daddr_v6, __entry->skbaddr)
 );
 
+TRACE_EVENT(ip_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 /* _TRACE_IP_H */
 
 /* This part must be outside protection */
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index 3a025c011971..2eb7a0cbc0d3 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -141,6 +141,7 @@ 
 #include <linux/mroute.h>
 #include <linux/netlink.h>
 #include <net/dst_metadata.h>
+#include <trace/events/ip.h>
 
 /*
  *	Process Router Attention IP option (RFC 2113)
@@ -400,6 +401,7 @@  static int ip_rcv_finish_core(struct net *net, struct sock *sk,
 			goto drop;
 	}
 
+	trace_ip_rcv(skb);
 	return NET_RX_SUCCESS;
 
 drop: