linux-kernel - [PATCH RFC v3 net-next 10/13] netfilter: nft_flow_offload: No ingress

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Message-ID: <20241210094501.3069-11-ericwouds@gmail.com>
Date: Tue, 10 Dec 2024 10:44:58 +0100
From: Eric Woudstra <ericwouds@...il.com>
To: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	Pablo Neira Ayuso <pablo@...filter.org>,
	Jozsef Kadlecsik <kadlec@...filter.org>,
	Jiri Pirko <jiri@...nulli.us>,
	Ivan Vecera <ivecera@...hat.com>,
	Roopa Prabhu <roopa@...dia.com>,
	Nikolay Aleksandrov <razor@...ckwall.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	David Ahern <dsahern@...nel.org>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Lorenzo Bianconi <lorenzo@...nel.org>,
	Joe Damato <jdamato@...tly.com>,
	Alexander Lobakin <aleksander.lobakin@...el.com>,
	Vladimir Oltean <olteanv@...il.com>,
	"Frank Wunderlich" <frank-w@...lic-files.de>,
	Daniel Golle <daniel@...rotopia.org>
Cc: netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	netfilter-devel@...r.kernel.org,
	coreteam@...filter.org,
	bridge@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	Eric Woudstra <ericwouds@...il.com>
Subject: [PATCH RFC v3 net-next 10/13] netfilter: nft_flow_offload: No ingress_vlan forward info for dsa user port

The bitfield info->ingress_vlans and correcponding vlan encap are used for
a switchdev user port. However, they should not be set for a dsa user port.

Signed-off-by: Eric Woudstra <ericwouds@...il.com>
---
 net/netfilter/nft_flow_offload.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/netfilter/nft_flow_offload.c b/net/netfilter/nft_flow_offload.c
index f7c2692ff3f2..387e5574c31f 100644
--- a/net/netfilter/nft_flow_offload.c
+++ b/net/netfilter/nft_flow_offload.c
@@ -117,6 +117,11 @@ static void nft_dev_path_info(const struct net_device_path_stack *stack,
 				break;
 			if (path->type == DEV_PATH_DSA) {
 				i = stack->num_paths;
+				if (!info->num_encaps ||
+				    !(info->ingress_vlans & BIT(info->num_encaps - 1)))
+					break;
+				info->num_encaps--;
+				info->ingress_vlans &= ~BIT(info->num_encaps - 1);
 				break;
 			}
 			if (path->type == DEV_PATH_MTK_WDMA) {
-- 
2.47.1