netdev - [PATCH net-next v2] net: add net cookie for trace_net_dev_xmit

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Message-Id: <20251024121853.94199-1-tonghao@bamaicloud.com>
Date: Fri, 24 Oct 2025 20:18:53 +0800
From: Tonghao Zhang <tonghao@...aicloud.com>
To: netdev@...r.kernel.org
Cc: Tonghao Zhang <tonghao@...aicloud.com>,
	Eran Ben Elisha <eranbe@...lanox.com>,
	Jiri Pirko <jiri@...lanox.com>,
	Cong Wang <xiyou.wangcong@...il.com>,
	Ido Schimmel <idosch@...sch.org>,
	Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH net-next v2] net: add net cookie for trace_net_dev_xmit_timeout

In a multi-network card or container environment, provide more information.

[002] ..s1.  1838.311662: net_dev_xmit_timeout: dev=eth0 driver=virtio_net queue=10 net_cookie=3
[007] ..s1.  1839.335650: net_dev_xmit_timeout: dev=eth4 driver=virtio_net queue=10 net_cookie=4100
[007] ..s1.  1844.455659: net_dev_xmit_timeout: dev=eth0 driver=virtio_net queue=10 net_cookie=3
[007] ..s1.  1845.479663: net_dev_xmit_timeout: dev=eth4 driver=virtio_net queue=10 net_cookie=4100
[002] ..s1.  1850.087647: net_dev_xmit_timeout: dev=eth0 driver=virtio_net queue=10 net_cookie=3

Cc: Eran Ben Elisha <eranbe@...lanox.com>
Cc: Jiri Pirko <jiri@...lanox.com>
Cc: Cong Wang <xiyou.wangcong@...il.com>
Cc: Ido Schimmel <idosch@...sch.org>
Cc: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Tonghao Zhang <tonghao@...aicloud.com>
---
v2: use net cookie instead of ifindex.
---
 include/trace/events/net.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/include/trace/events/net.h b/include/trace/events/net.h
index d55162c12f90..8d064bf1ae7f 100644
--- a/include/trace/events/net.h
+++ b/include/trace/events/net.h
@@ -107,16 +107,20 @@ TRACE_EVENT(net_dev_xmit_timeout,
 		__string(	name,		dev->name	)
 		__string(	driver,		netdev_drivername(dev))
 		__field(	int,		queue_index	)
+		__field(	u64,		net_cookie	)
 	),
 
 	TP_fast_assign(
 		__assign_str(name);
 		__assign_str(driver);
 		__entry->queue_index = queue_index;
+		__entry->net_cookie = dev_net(dev)->net_cookie;
 	),
 
-	TP_printk("dev=%s driver=%s queue=%d",
-		__get_str(name), __get_str(driver), __entry->queue_index)
+	TP_printk("dev=%s driver=%s queue=%d net_cookie=%llu",
+		__get_str(name), __get_str(driver),
+		__entry->queue_index,
+		__entry->net_cookie)
 );
 
 DECLARE_EVENT_CLASS(net_dev_template,
-- 
2.34.1