Re: [PATCH bpf-next 0/5] Extend libbpf to support shared umems and Rx|Tx-only sockets

[Alexei Starovoitov <alexei.starovoitov@gmail.com>]

On Thu, Nov 7, 2019 at 9:48 AM Magnus Karlsson
<magnus.karlsson@intel.com> wrote:
>
> This patch set extends libbpf and the xdpsock sample program to
> demonstrate the shared umem mode (XDP_SHARED_UMEM) as well as Rx-only
> and Tx-only sockets. This in order for users to have an example to use
> as a blue print and also so that these modes will be exercised more
> frequently.
>
> Note that the user needs to supply an XDP program with the
> XDP_SHARED_UMEM mode that distributes the packets over the sockets
> according to some policy. There is an example supplied with the
> xdpsock program, but there is no default one in libbpf similarly to
> when XDP_SHARED_UMEM is not used. The reason for this is that I felt
> that supplying one that would work for all users in this mode is
> futile. There are just tons of ways to distribute packets, so whatever
> I come up with and build into libbpf would be wrong in most cases.
>
> This patch has been applied against commit 30ee348c1267 ("Merge branch 'bpf-libbpf-fixes'")
>
> Structure of the patch set:
>
> Patch 1: Adds shared umem support to libbpf
> Patch 2: Shared umem support and example XPD program added to xdpsock sample
> Patch 3: Adds Rx-only and Tx-only support to libbpf
> Patch 4: Uses Rx-only sockets for rxdrop and Tx-only sockets for txpush in
>          the xdpsock sample
> Patch 5: Add documentation entries for these two features

Applied. Thanks