linux-kernel - [PATCH net-next v2 6/6] Documentation/tcp-ao: Add a few lines on tracepoints

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Message-Id: <20240605-tcp_ao-tracepoints-v2-6-e91e161282ef@gmail.com>
Date: Wed, 05 Jun 2024 03:20:07 +0100
From: Dmitry Safonov via B4 Relay <devnull+0x7f454c46.gmail.com@...nel.org>
To: Eric Dumazet <edumazet@...gle.com>, 
 "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
 Paolo Abeni <pabeni@...hat.com>, David Ahern <dsahern@...nel.org>, 
 Steven Rostedt <rostedt@...dmis.org>, 
 Masami Hiramatsu <mhiramat@...nel.org>, 
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, 
 Jonathan Corbet <corbet@....net>
Cc: Mohammad Nassiri <mnassiri@...na.com>, Simon Horman <horms@...nel.org>, 
 netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-trace-kernel@...r.kernel.org, linux-doc@...r.kernel.org, 
 Dmitry Safonov <0x7f454c46@...il.com>
Subject: [PATCH net-next v2 6/6] Documentation/tcp-ao: Add a few lines on
 tracepoints

From: Dmitry Safonov <0x7f454c46@...il.com>

Signed-off-by: Dmitry Safonov <0x7f454c46@...il.com>
---
 Documentation/networking/tcp_ao.rst | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/networking/tcp_ao.rst b/Documentation/networking/tcp_ao.rst
index 8a58321acce7..e96e62d1dab3 100644
--- a/Documentation/networking/tcp_ao.rst
+++ b/Documentation/networking/tcp_ao.rst
@@ -337,6 +337,15 @@ TCP-AO per-socket counters are also duplicated with per-netns counters,
 exposed with SNMP. Those are ``TCPAOGood``, ``TCPAOBad``, ``TCPAOKeyNotFound``,
 ``TCPAORequired`` and ``TCPAODroppedIcmps``.

+For monitoring purposes, there are following TCP-AO trace events:
+``tcp_hash_bad_header``, ``tcp_hash_ao_required``, ``tcp_ao_handshake_failure``,
+``tcp_ao_wrong_maclen``, ``tcp_ao_wrong_maclen``, ``tcp_ao_key_not_found``,
+``tcp_ao_rnext_request``, ``tcp_ao_synack_no_key``, ``tcp_ao_snd_sne_update``,
+``tcp_ao_rcv_sne_update``. It's possible to separately enable any of them and
+one can filter them by net-namespace, 4-tuple, family, L3 index, and TCP header
+flags. If a segment has a TCP-AO header, the filters may also include
+keyid, rnext, and maclen. SNE updates include the rolled-over numbers.
+
 RFC 5925 very permissively specifies how TCP port matching can be done for
 MKTs::

-- 
2.42.0