From patchwork Sat Aug 21 00:20:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kumar Kartikeya Dwivedi X-Patchwork-Id: 12450739 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=-15.8 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 2C47EC4338F for ; Sat, 21 Aug 2021 00:21:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0A39A61154 for ; Sat, 21 Aug 2021 00:21:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241079AbhHUAV5 (ORCPT ); Fri, 20 Aug 2021 20:21:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58058 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240968AbhHUAVv (ORCPT ); Fri, 20 Aug 2021 20:21:51 -0400 Received: from mail-pl1-x644.google.com (mail-pl1-x644.google.com [IPv6:2607:f8b0:4864:20::644]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 051B3C061764; Fri, 20 Aug 2021 17:21:13 -0700 (PDT) Received: by mail-pl1-x644.google.com with SMTP id e15so6880665plh.8; Fri, 20 Aug 2021 17:21:13 -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 :mime-version:content-transfer-encoding; bh=Bbj3hMWqVFxHWHurPDx/HXFQmItgMiISOwmdaCBwlh4=; b=UO1s5BstOKigWQrvWOk9k648KRbDRBHniF6UTL/HDWe36JQTbFImYxRvHyVk6hP904 KzwDfyk9Oayb/yOK5zPHMBYmMpKyNLaVtUFzYZuBJpQyQYiNubSUJOMWVxdq8vMTwG5K 99uR9ZFYOCsfqVwwBZ/AbmuZnMI5QFXMM+krXXFkNO20HouUAyikfWppCFFi/Mkgppq2 F8yVkZKDIxMwZ2oxiaoyyJ4V9MphXx7Paza3wfq8j5PVIJKP8YC1HGKoJYM6OU/9R6gR FJeGbszPFq8DAtSC1Xgh02AkrSARi82DV9pRCBR4saTrzG8SfKq/qi43GTHETWJH23sG uajw== 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:mime-version:content-transfer-encoding; bh=Bbj3hMWqVFxHWHurPDx/HXFQmItgMiISOwmdaCBwlh4=; b=eC4HwKkSDP1nqFOke/4Ae+7+mjYmwEMEpSFCYrZbzd8mT7r2gg7mqUzaE1qdUr+HGa ammyghjF+qiQ1263jQI4UWcLIJBOJjQVPrqiDBbBO288x72hAD0InT93kaj+St0+qkrq xQeDV4HkNBylQKCDj6Fx001WMD58QvVHdPrISN3z1tYpmd9/f+XOxeN4BP6adq6N/3QG wKoxzBAvPc1Ugv+Dz+xnF8TJPoanC+5YY12hqNvelFAN+hWtQJHuQutJXViEks5hvm4F AbRIgIrwhQ6WYTz0AYagQQkNBjymEmn1lVAAkgS+RoWOAl+B1ROE80FG05Q/qzqAGhto xrZA== X-Gm-Message-State: AOAM533Af2h54Ie/eXCNkCAP1cDVihtUth8+c7+PsbLBEJUSeObZTaGQ Z3fIdsaCy5pkyPpQP97F8EFnnlmWWpc= X-Google-Smtp-Source: ABdhPJzDJZcnXwl+7tQE16i3KUnlYA2tP5HwPdUqkq9vUcsiKGBzYyXp9GQOzxn7AL8DwDraFJ38Sw== X-Received: by 2002:a17:90a:d686:: with SMTP id x6mr7268503pju.8.1629505272356; Fri, 20 Aug 2021 17:21:12 -0700 (PDT) Received: from localhost ([2405:201:6014:d820:9cc6:d37f:c2fd:dc6]) by smtp.gmail.com with ESMTPSA id fh2sm7298915pjb.12.2021.08.20.17.21.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Aug 2021 17:21:12 -0700 (PDT) From: Kumar Kartikeya Dwivedi To: bpf@vger.kernel.org Cc: Kumar Kartikeya Dwivedi , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Jesper Dangaard Brouer , =?utf-8?q?Toke_H=C3=B8iland-J?= =?utf-8?q?=C3=B8rgensen?= , netdev@vger.kernel.org Subject: [PATCH bpf-next v4 19/22] samples: bpf: Convert xdp_redirect_map_kern.o to XDP samples helper Date: Sat, 21 Aug 2021 05:50:07 +0530 Message-Id: <20210821002010.845777-20-memxor@gmail.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210821002010.845777-1-memxor@gmail.com> References: <20210821002010.845777-1-memxor@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net Also update it to use consistent SEC("xdp") and SEC("xdp_devmap") naming, and use global variable instead of BPF map for copying the mac address. Signed-off-by: Kumar Kartikeya Dwivedi --- samples/bpf/Makefile | 6 +- ...rect_map_kern.c => xdp_redirect_map.bpf.c} | 89 +++++-------------- 2 files changed, 25 insertions(+), 70 deletions(-) rename samples/bpf/{xdp_redirect_map_kern.c => xdp_redirect_map.bpf.c} (57%) diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 43d3e52a8659..8faef4bcead4 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -163,7 +163,6 @@ always-y += tcp_clamp_kern.o always-y += tcp_basertt_kern.o always-y += tcp_tos_reflect_kern.o always-y += tcp_dumpstats_kern.o -always-y += xdp_redirect_map_kern.o always-y += xdp_redirect_map_multi_kern.o always-y += xdp_rxq_info_kern.o always-y += xdp2skb_meta_kern.o @@ -357,6 +356,7 @@ endef CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG)) $(obj)/xdp_redirect_cpu.bpf.o: $(obj)/xdp_sample.bpf.o +$(obj)/xdp_redirect_map.bpf.o: $(obj)/xdp_sample.bpf.o $(obj)/xdp_redirect.bpf.o: $(obj)/xdp_sample.bpf.o $(obj)/xdp_monitor.bpf.o: $(obj)/xdp_sample.bpf.o @@ -368,10 +368,12 @@ $(obj)/%.bpf.o: $(src)/%.bpf.c $(obj)/vmlinux.h $(src)/xdp_sample.bpf.h $(src)/x -I$(srctree)/tools/lib $(CLANG_SYS_INCLUDES) \ -c $(filter %.bpf.c,$^) -o $@ -LINKED_SKELS := xdp_redirect_cpu.skel.h xdp_redirect.skel.h xdp_monitor.skel.h +LINKED_SKELS := xdp_redirect_cpu.skel.h xdp_redirect_map.skel.h \ + xdp_redirect.skel.h xdp_monitor.skel.h clean-files += $(LINKED_SKELS) xdp_redirect_cpu.skel.h-deps := xdp_redirect_cpu.bpf.o xdp_sample.bpf.o +xdp_redirect_map.skel.h-deps := xdp_redirect_map.bpf.o xdp_sample.bpf.o xdp_redirect.skel.h-deps := xdp_redirect.bpf.o xdp_sample.bpf.o xdp_monitor.skel.h-deps := xdp_monitor.bpf.o xdp_sample.bpf.o diff --git a/samples/bpf/xdp_redirect_map_kern.c b/samples/bpf/xdp_redirect_map.bpf.c similarity index 57% rename from samples/bpf/xdp_redirect_map_kern.c rename to samples/bpf/xdp_redirect_map.bpf.c index a92b8e567bdd..59efd656e1b2 100644 --- a/samples/bpf/xdp_redirect_map_kern.c +++ b/samples/bpf/xdp_redirect_map.bpf.c @@ -10,14 +10,10 @@ * General Public License for more details. */ #define KBUILD_MODNAME "foo" -#include -#include -#include -#include -#include -#include -#include -#include + +#include "vmlinux.h" +#include "xdp_sample.bpf.h" +#include "xdp_sample_shared.h" /* The 2nd xdp prog on egress does not support skb mode, so we define two * maps, tx_port_general and tx_port_native. @@ -26,114 +22,71 @@ struct { __uint(type, BPF_MAP_TYPE_DEVMAP); __uint(key_size, sizeof(int)); __uint(value_size, sizeof(int)); - __uint(max_entries, 100); + __uint(max_entries, 1); } tx_port_general SEC(".maps"); struct { __uint(type, BPF_MAP_TYPE_DEVMAP); __uint(key_size, sizeof(int)); __uint(value_size, sizeof(struct bpf_devmap_val)); - __uint(max_entries, 100); -} tx_port_native SEC(".maps"); - -/* Count RX packets, as XDP bpf_prog doesn't get direct TX-success - * feedback. Redirect TX errors can be caught via a tracepoint. - */ -struct { - __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); - __type(key, u32); - __type(value, long); - __uint(max_entries, 1); -} rxcnt SEC(".maps"); - -/* map to store egress interface mac address */ -struct { - __uint(type, BPF_MAP_TYPE_ARRAY); - __type(key, u32); - __type(value, __be64); __uint(max_entries, 1); -} tx_mac SEC(".maps"); - -static void swap_src_dst_mac(void *data) -{ - unsigned short *p = data; - unsigned short dst[3]; +} tx_port_native SEC(".maps"); - dst[0] = p[0]; - dst[1] = p[1]; - dst[2] = p[2]; - p[0] = p[3]; - p[1] = p[4]; - p[2] = p[5]; - p[3] = dst[0]; - p[4] = dst[1]; - p[5] = dst[2]; -} +/* store egress interface mac address */ +const volatile char tx_mac_addr[ETH_ALEN]; static __always_inline int xdp_redirect_map(struct xdp_md *ctx, void *redirect_map) { void *data_end = (void *)(long)ctx->data_end; void *data = (void *)(long)ctx->data; + u32 key = bpf_get_smp_processor_id(); struct ethhdr *eth = data; - int rc = XDP_DROP; - long *value; - u32 key = 0; + struct datarec *rec; u64 nh_off; - int vport; nh_off = sizeof(*eth); if (data + nh_off > data_end) - return rc; - - /* constant virtual port */ - vport = 0; - - /* count packet in global counter */ - value = bpf_map_lookup_elem(&rxcnt, &key); - if (value) - *value += 1; + return XDP_DROP; + rec = bpf_map_lookup_elem(&rx_cnt, &key); + if (!rec) + return XDP_PASS; + NO_TEAR_INC(rec->processed); swap_src_dst_mac(data); - - /* send packet out physical port */ - return bpf_redirect_map(redirect_map, vport, 0); + return bpf_redirect_map(redirect_map, 0, 0); } -SEC("xdp_redirect_general") +SEC("xdp") int xdp_redirect_map_general(struct xdp_md *ctx) { return xdp_redirect_map(ctx, &tx_port_general); } -SEC("xdp_redirect_native") +SEC("xdp") int xdp_redirect_map_native(struct xdp_md *ctx) { return xdp_redirect_map(ctx, &tx_port_native); } -SEC("xdp_devmap/map_prog") +SEC("xdp_devmap/egress") int xdp_redirect_map_egress(struct xdp_md *ctx) { void *data_end = (void *)(long)ctx->data_end; void *data = (void *)(long)ctx->data; struct ethhdr *eth = data; - __be64 *mac; - u32 key = 0; u64 nh_off; nh_off = sizeof(*eth); if (data + nh_off > data_end) return XDP_DROP; - mac = bpf_map_lookup_elem(&tx_mac, &key); - if (mac) - __builtin_memcpy(eth->h_source, mac, ETH_ALEN); + __builtin_memcpy(eth->h_source, (const char *)tx_mac_addr, ETH_ALEN); return XDP_PASS; } /* Redirect require an XDP bpf_prog loaded on the TX device */ -SEC("xdp_redirect_dummy") +SEC("xdp") int xdp_redirect_dummy_prog(struct xdp_md *ctx) { return XDP_PASS;