From patchwork Mon Sep 28 14:38:51 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Borkmann X-Patchwork-Id: 11803921 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 993116CB for ; Mon, 28 Sep 2020 14:39:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8825B21974 for ; Mon, 28 Sep 2020 14:39:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726513AbgI1OjD (ORCPT ); Mon, 28 Sep 2020 10:39:03 -0400 Received: from www62.your-server.de ([213.133.104.62]:59206 "EHLO www62.your-server.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726465AbgI1OjD (ORCPT ); Mon, 28 Sep 2020 10:39:03 -0400 Received: from 75.57.196.178.dynamic.wline.res.cust.swisscom.ch ([178.196.57.75] helo=localhost) by www62.your-server.de with esmtpsa (TLSv1.2:DHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89_1) (envelope-from ) id 1kMuIv-0002dJ-CU; Mon, 28 Sep 2020 16:39:01 +0200 From: Daniel Borkmann To: ast@kernel.org Cc: daniel@iogearbox.net, john.fastabend@gmail.com, netdev@vger.kernel.org, bpf@vger.kernel.org Subject: [PATCH bpf-next v2 0/6] Various BPF helper improvements Date: Mon, 28 Sep 2020 16:38:51 +0200 Message-Id: X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 X-Authenticated-Sender: daniel@iogearbox.net X-Virus-Scanned: Clear (ClamAV 0.102.4/25940/Sun Sep 27 15:51:36 2020) Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org This series adds two BPF helpers, that is, one for retrieving the classid of an skb and another one to redirect via the neigh subsystem, and improves also the cookie helpers by removing the atomic counter. I've also added the bpf_tail_call_static() helper to the libbpf API that we've been using in Cilium for a while now, and last but not least the series adds a few selftests. For details, please check individual patches, thanks! v1 -> v2: - Rework cookie generator to support nested contexts (Eric) - Use ip_neigh_gw6() and container_of() (David) - Rename __throw_build_bug() and improve comments (Andrii) - Use bpf_tail_call_static() also in BPF samples (Maciej) Daniel Borkmann (6): bpf: add classid helper only based on skb->sk bpf, net: rework cookie generator as per-cpu one bpf: add redirect_neigh helper as redirect drop-in bpf, libbpf: add bpf_tail_call_static helper for bpf programs bpf, selftests: use bpf_tail_call_static where appropriate bpf, selftests: add redirect_neigh selftest include/linux/cookie.h | 50 +++ include/linux/skbuff.h | 5 + include/linux/sock_diag.h | 14 +- include/net/net_namespace.h | 2 +- include/uapi/linux/bpf.h | 24 ++ kernel/bpf/reuseport_array.c | 2 +- net/core/filter.c | 286 ++++++++++++++++-- net/core/net_namespace.c | 9 +- net/core/sock_diag.c | 9 +- net/core/sock_map.c | 4 +- samples/bpf/sockex3_kern.c | 20 +- tools/include/uapi/linux/bpf.h | 24 ++ tools/lib/bpf/bpf_helpers.h | 46 +++ tools/testing/selftests/bpf/progs/bpf_flow.c | 12 +- tools/testing/selftests/bpf/progs/tailcall1.c | 28 +- tools/testing/selftests/bpf/progs/tailcall2.c | 14 +- tools/testing/selftests/bpf/progs/tailcall3.c | 4 +- .../selftests/bpf/progs/tailcall_bpf2bpf1.c | 4 +- .../selftests/bpf/progs/tailcall_bpf2bpf2.c | 6 +- .../selftests/bpf/progs/tailcall_bpf2bpf3.c | 6 +- .../selftests/bpf/progs/tailcall_bpf2bpf4.c | 6 +- .../selftests/bpf/progs/test_tc_neigh.c | 144 +++++++++ tools/testing/selftests/bpf/test_tc_neigh.sh | 168 ++++++++++ 23 files changed, 807 insertions(+), 80 deletions(-) create mode 100644 include/linux/cookie.h create mode 100644 tools/testing/selftests/bpf/progs/test_tc_neigh.c create mode 100755 tools/testing/selftests/bpf/test_tc_neigh.sh