netdev - [PATCH net-next v3 0/2] Add IP/port information to UDP drop tracepoint

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Message-Id: <cover.1711356377.git.balazs.scheidler@axoflow.com>
Date: Mon, 25 Mar 2024 11:29:16 +0100
From: Balazs Scheidler <bazsi77@...il.com>
To: kerneljasonxing@...il.com,
	kuniyu@...zon.com,
	netdev@...r.kernel.org
Cc: Balazs Scheidler <balazs.scheidler@...flow.com>
Subject: [PATCH net-next v3 0/2] Add IP/port information to UDP drop tracepoint

Hi,

In our use-case we would like to recover the properties of dropped UDP
packets. Unfortunately the current udp_fail_queue_rcv_skb tracepoint
only exposes the port number of the receiving socket.

This patch-set will add the source/dest ip/port to the tracepoint, while 
keeping the socket's local port as well for compatibility.

Thanks for the review comments by Jason and Kuniyuki, they helped me a lot
and I tried to address all of their comments in this new iteration.

v3 updates:
  * Dropped "lport" as suggested by Jason Xing <kerneljasonxing@...il.com>
  * Clear saddr/daddr fields using memset() before populating the fields as
    suggested by Jason Xing.

v2 updates:
  * Addressed review notes by Kuniyuki Iwashima <kuniyu@...zon.com>

Balazs Scheidler (2):
  net: port TP_STORE_ADDR_PORTS_SKB macro to be tcp/udp independent
  net: udp: add IP/port data to the tracepoint
    udp/udp_fail_queue_rcv_skb

 include/trace/events/net_probe_common.h | 41 ++++++++++++++++++++++
 include/trace/events/tcp.h              | 45 ++-----------------------
 include/trace/events/udp.h              | 29 +++++++++++++---
 net/ipv4/udp.c                          |  2 +-
 net/ipv6/udp.c                          |  3 +-
 5 files changed, 70 insertions(+), 50 deletions(-)

-- 
2.40.1