netdev - [PATCH net-next v4 07/13] flow_dissector: set encapsulated control flags from tun

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Message-ID: <20240713021911.1631517-8-ast@fiberby.net>
Date: Sat, 13 Jul 2024 02:19:04 +0000
From: Asbjørn Sloth Tønnesen <ast@...erby.net>
To: netdev@...r.kernel.org
Cc: Asbjørn Sloth Tønnesen <ast@...erby.net>,
	Davide Caratti <dcaratti@...hat.com>,
	Ilya Maximets <i.maximets@....org>,
	Jamal Hadi Salim <jhs@...atatu.com>,
	Cong Wang <xiyou.wangcong@...il.com>,
	Jiri Pirko <jiri@...nulli.us>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	David Ahern <dsahern@...nel.org>,
	Simon Horman <horms@...nel.org>,
	Ratheesh Kannoth <rkannoth@...vell.com>,
	Florian Westphal <fw@...len.de>,
	Alexander Lobakin <aleksander.lobakin@...el.com>,
	Donald Hunter <donald.hunter@...il.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH net-next v4 07/13] flow_dissector: set encapsulated control flags from tun_flags

Set the new FLOW_DIS_F_TUNNEL_* encapsulated control flags, based
on if their counter-part is set in tun_flags.

These flags are not userspace visible yet, as the code to dump
encapsulated control flags will first be added, and later activated
in the following patches.

Signed-off-by: Asbjørn Sloth Tønnesen <ast@...erby.net>
Tested-by: Davide Caratti <dcaratti@...hat.com>
Reviewed-by: Davide Caratti <dcaratti@...hat.com>
---
 net/core/flow_dissector.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c
index 1614c6708ea7c..a0263a4c5489e 100644
--- a/net/core/flow_dissector.c
+++ b/net/core/flow_dissector.c
@@ -396,6 +396,15 @@ skb_flow_dissect_tunnel_info(const struct sk_buff *skb,
 
 	key = &info->key;
 
+	if (test_bit(IP_TUNNEL_CSUM_BIT, key->tun_flags))
+		ctrl_flags |= FLOW_DIS_F_TUNNEL_CSUM;
+	if (test_bit(IP_TUNNEL_DONT_FRAGMENT_BIT, key->tun_flags))
+		ctrl_flags |= FLOW_DIS_F_TUNNEL_DONT_FRAGMENT;
+	if (test_bit(IP_TUNNEL_OAM_BIT, key->tun_flags))
+		ctrl_flags |= FLOW_DIS_F_TUNNEL_OAM;
+	if (test_bit(IP_TUNNEL_CRIT_OPT_BIT, key->tun_flags))
+		ctrl_flags |= FLOW_DIS_F_TUNNEL_CRIT_OPT;
+
 	switch (ip_tunnel_info_af(info)) {
 	case AF_INET:
 		skb_flow_dissect_set_enc_control(FLOW_DISSECTOR_KEY_IPV4_ADDRS,
-- 
2.45.2