From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Fastabend Subject: [net-next PATCH v2 0/5] XDP for virtio_net Date: Sat, 19 Nov 2016 18:49:03 -0800 Message-ID: <20161120024710.19187.31037.stgit@john-Precision-Tower-5810> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, bblanco@plumgrid.com, john.fastabend@gmail.com, john.r.fastabend@intel.com, brouer@redhat.com, tgraf@suug.ch To: daniel@iogearbox.net, eric.dumazet@gmail.com, mst@redhat.com, kubakici@wp.pl, shm@cumulusnetworks.com, davem@davemloft.net, alexei.starovoitov@gmail.com Return-path: Received: from mail-pg0-f68.google.com ([74.125.83.68]:35649 "EHLO mail-pg0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753004AbcKTCtc (ORCPT ); Sat, 19 Nov 2016 21:49:32 -0500 Received: by mail-pg0-f68.google.com with SMTP id p66so24713815pga.2 for ; Sat, 19 Nov 2016 18:49:32 -0800 (PST) Sender: netdev-owner@vger.kernel.org List-ID: This implements virtio_net for the mergeable buffers and big_packet modes. I tested this with vhost_net running on qemu and did not see any issues. There are some restrictions for XDP to be enabled (see patch 3) for more details. 1. LRO must be off 2. MTU must be less than PAGE_SIZE 3. queues must be available to dedicate to XDP 4. num_bufs received in mergeable buffers must be 1 5. big_packet mode must have all data on single page Please review any comments/feedback welcome as always. v2, fixes rcu usage throughout thanks to Eric and the use of num_online_cpus() usage thanks to Jakub. Thanks, John --- John Fastabend (4): net: virtio dynamically disable/enable LRO net: xdp: add invalid buffer warning virtio_net: add dedicated XDP transmit queues virtio_net: add XDP_TX support Shrijeet Mukherjee (1): virtio_net: Add XDP support drivers/net/virtio_net.c | 268 +++++++++++++++++++++++++++++++++++++++++++++- include/linux/filter.h | 1 net/core/filter.c | 6 + 3 files changed, 270 insertions(+), 5 deletions(-)