[net-next,v2,0/2] net: allow dissecting/matching tunnel control flags
Davide Caratti Feb. 1, 2024, 4:51 p.m. UTC
Ilya says: "for correct matching on decapsulated packets, we should match on not only tunnel id and headers, but also on tunnel configuration flags like TUNNEL_NO_CSUM and TUNNEL_DONT_FRAGMENT. This is done to distinguish similar tunnels with slightly different configs. And it is important since tunnel configuration is flow based, i.e. can be different for every packet, even though the main tunnel port is the same." 
- patch 1 extends the kernel's flow dissector to extract these flags    from the packet's tunnel metadata.  
- patch 2 extends TC flower to match on any combination of TUNNEL_NO_CSUM,    TUNNEL_OAM and TUNNEL_DONT_FRAGMENT.