Re: [PATCH bpf-next 2/3] bpf: Add support for writing to nf_conn:mark

[Toke Høiland-Jørgensen]

Daniel Xu <dxu@xxxxxxxxx> writes:

> Support direct writes to nf_conn:mark from TC and XDP prog types. This
> is useful when applications want to store per-connection metadata. This
> is also particularly useful for applications that run both bpf and
> iptables/nftables because the latter can trivially access this metadata.
>
> One example use case would be if a bpf prog is responsible for advanced
> packet classification and iptables/nftables is later used for routing
> due to pre-existing/legacy code.
>
> Signed-off-by: Daniel Xu <dxu@xxxxxxxxx>

Didn't we agree the last time around that all field access should be
using helper kfuncs instead of allowing direct writes to struct nf_conn?

-Toke