On Tue, Oct 1, 2019 at 11:44 AM Stephen Hemminger <[email protected]> wrote: > > On Mon, 30 Sep 2019 11:16:14 -0400 > Willem de Bruijn <[email protected]> wrote: > > > On Mon, Sep 30, 2019 at 1:24 AM Sriram Krishnan <[email protected]> wrote: > > > > > > When an application sends with AF_PACKET and places a vlan header on > > > the raw packet; then the AF_PACKET needs to move the tag into the skb > > > so that it gets processed normally through the rest of the transmit > > > path. > > > > > > This is particularly a problem on Hyper-V where the host only allows > > > vlan in the offload info. > > > > This sounds like behavior that needs to be addressed in the driver, instead? > > This was what we did first, but the problem was more general. > For example, many filtering functions assume that vlan tag is in > skb meta data, not the packet data itself.
Out of curiosity, can you share an example? > Therefore AF_PACKET would > get around any filter rules. Packet sockets are not the only way to inject packets into the kernel. This probably also affects tap.
