From 3ae37eafd36694bb2d3227f60ac98fbf602470a2 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Wed, 23 Sep 2026 20:46:18 +0200 Subject: netfilter: flowtable: restore ieee80211 forward path Before commit 871df5007eda ("netfilter: flowtable: bail out if forward path cannot be discovered"), there was a fallback to set up a forward path in case .ndo_fill_forward_path fails or DEV_PATH_MTK_WDMA was used. Such fallback was used by commit d787a3e38f01 ("mac80211: add support for .ndo_fill_forward_path"). One possibility is to handle DEV_PATH_MTK_WDMA from the flowtable forward path discovery. However, this is only used internally by drivers to retrieve mtk_wdma information to set up hardware offload. Felix decided to use the .fill_forward_path interface for this purpose due to the lack of a better interface at that time. Add a new DEV_PATH_IEEE80211 path which is offered if the new ieee80211 flag is set on in the struct net_device_path_ctx to restore the flowtable with a ieee80211 netdevice. Handle this new DEV_PATH_IEEE80211 path just like DEV_PATH_ETHERNET and DEV_PATH_DSA, ie. this is the last netdevice in the stack. This new ieee80211 flag is implicitly unset for mtk_ppe and airoha which call dev_fill_forward_path() to retrieve a DEV_PATH_MTK_WDMA path. Fixes: 871df5007eda ("netfilter: flowtable: bail out if forward path cannot be discovered") Signed-off-by: Pablo Neira Ayuso --- include/linux/netdevice.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 87cafc932e9e..3cff2174dc03 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -887,6 +887,7 @@ enum net_device_path_type { DEV_PATH_DSA, DEV_PATH_MTK_WDMA, DEV_PATH_TUN, + DEV_PATH_IEEE80211, }; struct net_device_path { @@ -953,6 +954,8 @@ struct net_device_path_ctx { u16 id; __be16 proto; } vlan[NET_DEVICE_PATH_VLAN_MAX]; + + bool ieee80211; }; enum tc_setup_type { -- cgit v1.2.3