netdev - [PATCH net-next 1/2] tcp: add tracing of skb/skaddr in tcp_event_sk

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Date: Fri,  1 Mar 2024 01:09:55 +0800
From: Jason Xing <kerneljasonxing@...il.com>
To: edumazet@...gle.com,
	mhiramat@...nel.org,
	mathieu.desnoyers@...icios.com,
	rostedt@...dmis.org
Cc: netdev@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org,
	kerneljasonxing@...il.com,
	Jason Xing <kernelxing@...cent.com>
Subject: [PATCH net-next 1/2] tcp: add tracing of skb/skaddr in tcp_event_sk_skb class

From: Jason Xing <kernelxing@...cent.com>

Prio to this patch, the trace function doesn't print addresses
which might be forgotten. As we can see, it already fetches
those, use it directly and it will print like below:

...tcp_retransmit_skb: skbaddr=XXX skaddr=XXX family=AF_INET...

Signed-off-by: Jason Xing <kernelxing@...cent.com>
---
 include/trace/events/tcp.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/trace/events/tcp.h b/include/trace/events/tcp.h
index 7b1ddffa3dfc..ac36067ae066 100644
--- a/include/trace/events/tcp.h
+++ b/include/trace/events/tcp.h
@@ -88,7 +88,8 @@ DECLARE_EVENT_CLASS(tcp_event_sk_skb,
 			      sk->sk_v6_rcv_saddr, sk->sk_v6_daddr);
 	),
 
-	TP_printk("family=%s sport=%hu dport=%hu saddr=%pI4 daddr=%pI4 saddrv6=%pI6c daddrv6=%pI6c state=%s",
+	TP_printk("skbaddr=%p skaddr=%p family=%s sport=%hu dport=%hu saddr=%pI4 daddr=%pI4 saddrv6=%pI6c daddrv6=%pI6c state=%s",
+		  __entry->skbaddr, __entry->skaddr,
 		  show_family_name(__entry->family),
 		  __entry->sport, __entry->dport, __entry->saddr, __entry->daddr,
 		  __entry->saddr_v6, __entry->daddr_v6,
-- 
2.37.3