On 25 June 2018 at 12:07, Sameeh Jubran <sam...@daynix.com> wrote: > From: Sameeh Jubran <sjub...@redhat.com> > > The Berkeley Packet Filter has been in the kernel for a while now and I > think it is time that it is introduced to Qemu. This patch is an > infrastructure for any future usage of the BPF in Qemu. > > It is important to note that the tun driver had started supporting using > BPF programs through ioctls (TUNSETSTEERINGEBPF and TUNSETFILTEREBPF). > My plan is to use the bpf support from within virtio-net in order to set > a bpf steering program to the tun device which would allow virtio-net to > support RSS feature > https://lists.oasis-open.org/archives/virtio-dev/201805/msg00024.html > > Difference from v1: > * Used libbpf library provided by linux > * Added a configure option > * Added a sample patch with demonstrates how to use the libbpf library > from within virtio-net. This patch should not be applied! It is for > demonstration purposes only > > The libbpf can be manually installed from the Linux source tree by running > make > tools/bpf and make tools/bpf_install from the top level directory.
I'm afraid this series still doesn't have a real use case for the library, which is what we would need to be able to review whether using BPF is a sensible design for whatever the underlying feature to be implemented is. That is, what you should be sending is "here is a patchset to implement RSS in virtio-net (and it happens to be implemented using BPF)", not "here is a patchset which links QEMU with libbpf and does nothing else". thanks -- PMM
