Re: [PATCH net-next v3 7/8] selftests: drv-net: add primary_rx_redirect support to NetDrvContEnv

[Stanislav Fomichev]

On 05/07, Bobby Eshleman wrote:
> From: Bobby Eshleman <bobbyeshleman@xxxxxxxx>
> 
> When sending from a namespace that has access to a netkit device with a
> leased queue, the nk primary in the host namespace needs to redirect its
> RX to the physical device. This patch adds that redirection bpf program
> and teaches the harness to install it.
> 
> Add primary_rx_redirect=False parameter to NetDrvContEnv.__init__().
> When enabled, _attach_primary_rx_redirect_bpf() attaches a new BPF TC
> program (nk_primary_rx_redirect.bpf.c) to the primary (host-side) netkit
> interface. The program redirects non-ICMPv6 IPv6 packets to the physical
> NIC via bpf_redirect_neigh(), with the physical ifindex configured via
> the .bss map. ICMPv6 is left on the host's netkit primary so IPv6
> neighbor discovery still work locally.
> 
> Extract _find_bss_map_id() from _attach_bpf() into a reusable helper so
> other BPF attachment methods can use it.
> 
> Signed-off-by: Bobby Eshleman <bobbyeshleman@xxxxxxxx>

Acked-by: Stanislav Fomichev <sdf@xxxxxxxxxxx>