On Fri, 22 May 2020 14:08:05 +0200 Jesper Dangaard Brouer <bro...@redhat.com> wrote:
> On Thu, 21 May 2020 19:05:23 -0600 > David Ahern <dsah...@kernel.org> wrote: > > > Add support to DEVMAP and DEVMAP_HASH to support 8-byte values as a > > <device index, program id> pair. To do this, a new struct is needed in > > bpf_dtab_netdev to hold the values to return on lookup. > > I would like to see us leverage BTF instead of checking on the size > attr->value_size. E.g do the sanity check based on BTF. > Given I don't know the exact details on how this should be done, I will > look into it... I already promised Lorenzo, as we have already > discussed this on IRC. > > So, you can Lorenzo can go ahead with this approach, and test the > use-case. And I'll try to figure out if-and-how we can leverage BTF > here. Input from BTF experts will be much appreciated. Published my current notes here: https://github.com/xdp-project/xdp-project/blob/BTF01-notes.public/areas/core/BTF_01_notes.org And created PR that people can GitHub "subscribe" to, if you are interested: https://github.com/xdp-project/xdp-project/pull/36 -- Best regards, Jesper Dangaard Brouer MSc.CS, Principal Kernel Engineer at Red Hat LinkedIn: http://www.linkedin.com/in/brouer
