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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , netdev@vger.kernel.org Cc: Marcelo Ricardo Leitner , Xin Long , Ilya Maximets Subject: [PATCH net-next v2 1/2] flow_dissector: add support for tunnel control flags Date: Thu, 1 Feb 2024 17:51:43 +0100 Message-ID: <1e7f0f6ddf38d85d3b0eecdb0dc3389c27ea7d2a.1706805548.git.dcaratti@redhat.com> In-Reply-To: References: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.10 X-Patchwork-Delegate: kuba@kernel.org dissect [no]csum, [no]dontfrag, [no]oam flags on 'external' tunnels. This is a prerequisite for matching these control flags using TC flower. Suggested-by: Ilya Maximets Signed-off-by: Davide Caratti --- include/net/flow_dissector.h | 11 +++++++++++ net/core/flow_dissector.c | 13 ++++++++++++- 2 files changed, 23 insertions(+), 1 deletion(-) diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h index 1a7131d6cb0e..98a0050d5cc3 100644 --- a/include/net/flow_dissector.h +++ b/include/net/flow_dissector.h @@ -329,6 +329,16 @@ struct flow_dissector_key_cfm { #define FLOW_DIS_CFM_MDL_MASK GENMASK(7, 5) #define FLOW_DIS_CFM_MDL_MAX 7 +/** + * struct flow_dissector_key_enc_flags + * @flags: tunnel control flags + */ +struct flow_dissector_key_enc_flags { + __be16 flags; +}; + +#define TUNNEL_FLAGS_PRESENT (TUNNEL_CSUM | TUNNEL_DONT_FRAGMENT | TUNNEL_OAM) + enum flow_dissector_key_id { FLOW_DISSECTOR_KEY_CONTROL, /* struct flow_dissector_key_control */ FLOW_DISSECTOR_KEY_BASIC, /* struct flow_dissector_key_basic */ @@ -363,6 +373,7 @@ enum flow_dissector_key_id { FLOW_DISSECTOR_KEY_L2TPV3, /* struct flow_dissector_key_l2tpv3 */ FLOW_DISSECTOR_KEY_CFM, /* struct flow_dissector_key_cfm */ FLOW_DISSECTOR_KEY_IPSEC, /* struct flow_dissector_key_ipsec */ + FLOW_DISSECTOR_KEY_ENC_FLAGS, /* struct flow_dissector_key_enc_flags */ FLOW_DISSECTOR_KEY_MAX, }; diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c index 272f09251343..9099a5524d7c 100644 --- a/net/core/flow_dissector.c +++ b/net/core/flow_dissector.c @@ -382,7 +382,9 @@ skb_flow_dissect_tunnel_info(const struct sk_buff *skb, !dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_ENC_IP) && !dissector_uses_key(flow_dissector, - FLOW_DISSECTOR_KEY_ENC_OPTS)) + FLOW_DISSECTOR_KEY_ENC_OPTS) && + !dissector_uses_key(flow_dissector, + FLOW_DISSECTOR_KEY_ENC_FLAGS)) return; info = skb_tunnel_info(skb); @@ -467,6 +469,15 @@ skb_flow_dissect_tunnel_info(const struct sk_buff *skb, TUNNEL_OPTIONS_PRESENT; } } + + if (dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_ENC_FLAGS)) { + struct flow_dissector_key_enc_flags *enc_flags; + + enc_flags = skb_flow_dissector_target(flow_dissector, + FLOW_DISSECTOR_KEY_ENC_FLAGS, + target_container); + enc_flags->flags = info->key.tun_flags & TUNNEL_FLAGS_PRESENT; + } } EXPORT_SYMBOL(skb_flow_dissect_tunnel_info);