From patchwork Thu Jun 24 09:18:43 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jussi Maki X-Patchwork-Id: 12341623 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C0A89C49EA6 for ; Thu, 24 Jun 2021 09:19:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A9BBA613E8 for ; Thu, 24 Jun 2021 09:19:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231668AbhFXJVV (ORCPT ); Thu, 24 Jun 2021 05:21:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57798 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231656AbhFXJVT (ORCPT ); Thu, 24 Jun 2021 05:21:19 -0400 Received: from mail-wr1-x42f.google.com (mail-wr1-x42f.google.com [IPv6:2a00:1450:4864:20::42f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6C21EC061760; Thu, 24 Jun 2021 02:19:00 -0700 (PDT) Received: by mail-wr1-x42f.google.com with SMTP id j1so5801720wrn.9; Thu, 24 Jun 2021 02:19:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=DuciXB8pC/S/cafIAkU7rNe3wfMQWIg6ua/o3EYWQgk=; b=YirveEKm5nW9Advs2EgBG4r4bLB00qOAjhdq6hMtC7BZOACkjyZTPKaPgF0Tmo5smE 01A334WlLy6ddUAGtMgaOi5dqZKCjXEruCAiBN0rqV9bcHE0c3q6QMMj4DzLDbZe3vNc ++qslY10Lw9MwojPhKgB38LjEJpjBGZomcH793J79lJVW0uMkHS/wkczqjkPW9nuVIQ9 EZe+5ofEYj2vYtbbWqvdow/nDz0Hj74YsYmBDdDTkWDAnd/Ul7rLG9EZUj7t+YvkX2DA OE4vndkwKu3s0z/VPLy+kahTJ0yHwjVCFt1ohxCiRII0DAR9aCnk28BWgfRfc5rZdvbb ZLvQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=DuciXB8pC/S/cafIAkU7rNe3wfMQWIg6ua/o3EYWQgk=; b=E4RJ5wY32DewtX/6ZVzt4bkgFNgB/Cd/PpK7XL7Cyso2tnNiY+gmBYDkporRs9sbb1 UQi/Ju6dY3DvRMV5EtCvzeTgaycMy1lb6myHTdnpbpXI7sOp56GKSLQdFQjTK8nSRr08 7RchqKBGV6oD8aeCJ7Do8wwThlX7e+BkOx07QwB8/N0zCG+72p052A2HVA8IOYO20oow Q5eZLiXFheaN054XgCp4rVitnSexGHqQ4OB0Qt9iezXck41SAvahNH4hXBss92UCy3B3 PutHNvmVLrzPJ1G3wy6JkmGFdW2KzssjQH0CSmglWdidCOV45oV9Nj3vObsmvY36CSM/ fFBQ== X-Gm-Message-State: AOAM5336M13UghnKNhnSNv7djsOKz7unl7xvuN0LorGAJvOXRskYD802 TRpwxtgS+cQ2d+m0RRG8/Q2YH06YCg9bZr4= X-Google-Smtp-Source: ABdhPJzIhL8DwCPWubiRYfU6YG5cV/d3+8cp6149ytNIu3E1a91PUCgAWwjLTXTkIK7Z7wff2p+iug== X-Received: by 2002:a5d:69c3:: with SMTP id s3mr3323656wrw.235.1624526338829; Thu, 24 Jun 2021 02:18:58 -0700 (PDT) Received: from localhost.localdomain (212-51-151-130.fiber7.init7.net. [212.51.151.130]) by smtp.gmail.com with ESMTPSA id r1sm2456216wmh.32.2021.06.24.02.18.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Jun 2021 02:18:58 -0700 (PDT) From: joamaki@gmail.com To: bpf@vger.kernel.org Cc: netdev@vger.kernel.org, daniel@iogearbox.net, j.vosburgh@gmail.com, andy@greyhouse.net, vfalico@gmail.com, andrii@kernel.org, maciej.fijalkowski@intel.com, magnus.karlsson@intel.com, Jussi Maki Subject: [PATCH bpf-next v2 4/4] devmap: Exclude XDP broadcast to master device Date: Thu, 24 Jun 2021 09:18:43 +0000 Message-Id: <20210624091843.5151-5-joamaki@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210624091843.5151-1-joamaki@gmail.com> References: <20210609135537.1460244-1-joamaki@gmail.com> <20210624091843.5151-1-joamaki@gmail.com> Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net From: Jussi Maki If the ingress device is bond slave, do not broadcast back through it or the bond master. Signed-off-by: Jussi Maki --- kernel/bpf/devmap.c | 34 ++++++++++++++++++++++++++++------ 1 file changed, 28 insertions(+), 6 deletions(-) diff --git a/kernel/bpf/devmap.c b/kernel/bpf/devmap.c index 2a75e6c2d27d..0864fb28c8b5 100644 --- a/kernel/bpf/devmap.c +++ b/kernel/bpf/devmap.c @@ -514,9 +514,11 @@ int dev_map_enqueue(struct bpf_dtab_netdev *dst, struct xdp_buff *xdp, } static bool is_valid_dst(struct bpf_dtab_netdev *obj, struct xdp_buff *xdp, - int exclude_ifindex) + int exclude_ifindex, int exclude_ifindex_master) { - if (!obj || obj->dev->ifindex == exclude_ifindex || + if (!obj || + obj->dev->ifindex == exclude_ifindex || + obj->dev->ifindex == exclude_ifindex_master || !obj->dev->netdev_ops->ndo_xdp_xmit) return false; @@ -546,12 +548,19 @@ int dev_map_enqueue_multi(struct xdp_buff *xdp, struct net_device *dev_rx, { struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map); int exclude_ifindex = exclude_ingress ? dev_rx->ifindex : 0; + int exclude_ifindex_master = 0; struct bpf_dtab_netdev *dst, *last_dst = NULL; struct hlist_head *head; struct xdp_frame *xdpf; unsigned int i; int err; + if (static_branch_unlikely(&bpf_master_redirect_enabled_key)) { + struct net_device *master = netdev_master_upper_dev_get_rcu(dev_rx); + + exclude_ifindex_master = (master && exclude_ingress) ? master->ifindex : 0; + } + xdpf = xdp_convert_buff_to_frame(xdp); if (unlikely(!xdpf)) return -EOVERFLOW; @@ -559,7 +568,7 @@ int dev_map_enqueue_multi(struct xdp_buff *xdp, struct net_device *dev_rx, if (map->map_type == BPF_MAP_TYPE_DEVMAP) { for (i = 0; i < map->max_entries; i++) { dst = READ_ONCE(dtab->netdev_map[i]); - if (!is_valid_dst(dst, xdp, exclude_ifindex)) + if (!is_valid_dst(dst, xdp, exclude_ifindex, exclude_ifindex_master)) continue; /* we only need n-1 clones; last_dst enqueued below */ @@ -579,7 +588,9 @@ int dev_map_enqueue_multi(struct xdp_buff *xdp, struct net_device *dev_rx, head = dev_map_index_hash(dtab, i); hlist_for_each_entry_rcu(dst, head, index_hlist, lockdep_is_held(&dtab->index_lock)) { - if (!is_valid_dst(dst, xdp, exclude_ifindex)) + if (!is_valid_dst(dst, xdp, + exclude_ifindex, + exclude_ifindex_master)) continue; /* we only need n-1 clones; last_dst enqueued below */ @@ -646,16 +657,25 @@ int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb, { struct bpf_dtab *dtab = container_of(map, struct bpf_dtab, map); int exclude_ifindex = exclude_ingress ? dev->ifindex : 0; + int exclude_ifindex_master = 0; struct bpf_dtab_netdev *dst, *last_dst = NULL; struct hlist_head *head; struct hlist_node *next; unsigned int i; int err; + if (static_branch_unlikely(&bpf_master_redirect_enabled_key)) { + struct net_device *master = netdev_master_upper_dev_get_rcu(dev); + + exclude_ifindex_master = (master && exclude_ingress) ? master->ifindex : 0; + } + if (map->map_type == BPF_MAP_TYPE_DEVMAP) { for (i = 0; i < map->max_entries; i++) { dst = READ_ONCE(dtab->netdev_map[i]); - if (!dst || dst->dev->ifindex == exclude_ifindex) + if (!dst || + dst->dev->ifindex == exclude_ifindex || + dst->dev->ifindex == exclude_ifindex_master) continue; /* we only need n-1 clones; last_dst enqueued below */ @@ -674,7 +694,9 @@ int dev_map_redirect_multi(struct net_device *dev, struct sk_buff *skb, for (i = 0; i < dtab->n_buckets; i++) { head = dev_map_index_hash(dtab, i); hlist_for_each_entry_safe(dst, next, head, index_hlist) { - if (!dst || dst->dev->ifindex == exclude_ifindex) + if (!dst || + dst->dev->ifindex == exclude_ifindex || + dst->dev->ifindex == exclude_ifindex_master) continue; /* we only need n-1 clones; last_dst enqueued below */