From patchwork Wed May 19 09:07:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Hangbin Liu X-Patchwork-Id: 443068 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, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 E2322C433B4 for ; Wed, 19 May 2021 09:10:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BBE0C6135F for ; Wed, 19 May 2021 09:10:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344750AbhESJLn (ORCPT ); Wed, 19 May 2021 05:11:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52604 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344715AbhESJJx (ORCPT ); Wed, 19 May 2021 05:09:53 -0400 Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7DF8FC06138E; Wed, 19 May 2021 02:08:25 -0700 (PDT) Received: by mail-pl1-x62d.google.com with SMTP id a11so6663383plh.3; Wed, 19 May 2021 02:08:25 -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=AFsv6ieJry9nJN+layFGZr00vGImCztWWaA8fjj1554=; b=rfPE2Wzy6rwIWHHsdKVKOgyrIAemXEi8BTIXEex3aQaGUtlNLN2H2UWCmkkPD999RE bNdGqkpDbv3XdA8LXMeZhiuJtmIs+J3G7L+c/q4S3UGdlIANDL8t35Li3aqJAJzAkHC4 AgYpU6Pn3b4o7+9HdSIM+REfBaxV54WJLS55kehpMlK4mUc8BE1bdiT9URcss+MuLPsz bx5mzeOwkAVFrxbTZMIEAQgwy3FSyvFf/fVITxqSr6TBL+9lquhzgxW7uLdE7tIVOmb/ u5OWmU9hnnNbBlRa29jKJOyL0hK4D5NJFAN6s8pSsVbaxfcDFsfNmQq1PqwQrhi6d7rK 9f4w== 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=AFsv6ieJry9nJN+layFGZr00vGImCztWWaA8fjj1554=; b=BqciklN+lrLdWCNJjHhx82xHZlbQ3+zP2GG2X44rZH/ny2/5Trhh2ClvcnKzA6O27X Rk/BIbM5aWFN1kwYpEphO5ixggCM5ept/vSJYDAjDVclb5cNGI0OJhRC3dP9+Tu7EtYE ++s+PGAXhCfs1yRLcumqpfj5comguIB1yHRPmLJFxif4E8sR8QDtGHh8BsQHDhfp86vo NNrZpK6uW4UXYnyAEgGbumG1d8TTvw4fxYImY72yxd8FIWs7BjoPpjbxe+ufGBPxnqnY FdIFVt0s/eluygdQNgmI1gq9sB+y0WumLm+w7JXaOs2tpf98Bb7ZTkZg9sCSRvOj/ol0 mdVA== X-Gm-Message-State: AOAM530epDiIDb5IFFIUt0CatAMNyCS4mG5I52hNVGVUBd3IKxyI9iFz 4fuv6u6OOfmbAZFmNc2JQiWY+mAnevjiYQ== X-Google-Smtp-Source: ABdhPJxGBtj/s8viomjh5prvThUHendv+jJwJ09P2MBcm+Jj9/jlFxHz/qJOCObiMbEjxkCewae2AQ== X-Received: by 2002:a17:90b:3796:: with SMTP id mz22mr10128880pjb.80.1621415305045; Wed, 19 May 2021 02:08:25 -0700 (PDT) Received: from Leo-laptop-t470s.redhat.com ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id s6sm14701848pgv.48.2021.05.19.02.08.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 May 2021 02:08:24 -0700 (PDT) From: Hangbin Liu To: bpf@vger.kernel.org Cc: netdev@vger.kernel.org, =?utf-8?q?Toke_H=C3=B8iland-J=C3=B8rgensen?= , Jiri Benc , Jesper Dangaard Brouer , Eelco Chaudron , ast@kernel.org, Daniel Borkmann , Lorenzo Bianconi , David Ahern , Andrii Nakryiko , Alexei Starovoitov , John Fastabend , Maciej Fijalkowski , =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= , Martin KaFai Lau , Hangbin Liu Subject: [PATCH v12 bpf-next 4/4] selftests/bpf: add xdp_redirect_multi test Date: Wed, 19 May 2021 17:07:47 +0800 Message-Id: <20210519090747.1655268-5-liuhangbin@gmail.com> X-Mailer: git-send-email 2.26.3 In-Reply-To: <20210519090747.1655268-1-liuhangbin@gmail.com> References: <20210519090747.1655268-1-liuhangbin@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Add a bpf selftest for new helper xdp_redirect_map_multi(). In this test there are 3 forward groups and 1 exclude group. The test will redirect each interface's packets to all the interfaces in the forward group, and exclude the interface in exclude map. Two maps (DEVMAP, DEVMAP_HASH) and two xdp modes (generic, drive) will be tested. XDP egress program will also be tested by setting pkt src MAC to egress interface's MAC address. For more test details, you can find it in the test script. Here is the test result. ]# time ./test_xdp_redirect_multi.sh Pass: xdpgeneric arp(F_BROADCAST) ns1-1 Pass: xdpgeneric arp(F_BROADCAST) ns1-2 Pass: xdpgeneric arp(F_BROADCAST) ns1-3 Pass: xdpgeneric IPv4 (F_BROADCAST|F_EXCLUDE_INGRESS) ns1-1 Pass: xdpgeneric IPv4 (F_BROADCAST|F_EXCLUDE_INGRESS) ns1-2 Pass: xdpgeneric IPv4 (F_BROADCAST|F_EXCLUDE_INGRESS) ns1-3 Pass: xdpgeneric IPv6 (no flags) ns1-1 Pass: xdpgeneric IPv6 (no flags) ns1-2 Pass: xdpdrv arp(F_BROADCAST) ns1-1 Pass: xdpdrv arp(F_BROADCAST) ns1-2 Pass: xdpdrv arp(F_BROADCAST) ns1-3 Pass: xdpdrv IPv4 (F_BROADCAST|F_EXCLUDE_INGRESS) ns1-1 Pass: xdpdrv IPv4 (F_BROADCAST|F_EXCLUDE_INGRESS) ns1-2 Pass: xdpdrv IPv4 (F_BROADCAST|F_EXCLUDE_INGRESS) ns1-3 Pass: xdpdrv IPv6 (no flags) ns1-1 Pass: xdpdrv IPv6 (no flags) ns1-2 Pass: xdpegress mac ns1-2 Pass: xdpegress mac ns1-3 Summary: PASS 18, FAIL 0 real 1m18.321s user 0m0.123s sys 0m0.350s Acked-by: Toke Høiland-Jørgensen Signed-off-by: Hangbin Liu --- v11: remove some sleeps to reduce the testing time. Re-struct the test and make clear what flags we are testing. v2-v10: no update v2: add a IPv6 test to validates that single redirect still works after multicast redirect. --- tools/testing/selftests/bpf/Makefile | 3 +- .../bpf/progs/xdp_redirect_multi_kern.c | 94 ++++++++ .../selftests/bpf/test_xdp_redirect_multi.sh | 204 ++++++++++++++++ .../selftests/bpf/xdp_redirect_multi.c | 226 ++++++++++++++++++ 4 files changed, 526 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/bpf/progs/xdp_redirect_multi_kern.c create mode 100755 tools/testing/selftests/bpf/test_xdp_redirect_multi.sh create mode 100644 tools/testing/selftests/bpf/xdp_redirect_multi.c diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index 525e4b3fb514..f405b20c1e6c 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -54,6 +54,7 @@ TEST_FILES = xsk_prereqs.sh \ # Order correspond to 'make run_tests' order TEST_PROGS := test_kmod.sh \ test_xdp_redirect.sh \ + test_xdp_redirect_multi.sh \ test_xdp_meta.sh \ test_xdp_veth.sh \ test_offload.py \ @@ -84,7 +85,7 @@ TEST_PROGS_EXTENDED := with_addr.sh \ TEST_GEN_PROGS_EXTENDED = test_sock_addr test_skb_cgroup_id_user \ flow_dissector_load test_flow_dissector test_tcp_check_syncookie_user \ test_lirc_mode2_user xdping test_cpp runqslower bench bpf_testmod.ko \ - xdpxceiver + xdpxceiver xdp_redirect_multi TEST_CUSTOM_PROGS = $(OUTPUT)/urandom_read diff --git a/tools/testing/selftests/bpf/progs/xdp_redirect_multi_kern.c b/tools/testing/selftests/bpf/progs/xdp_redirect_multi_kern.c new file mode 100644 index 000000000000..880debcbcd65 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/xdp_redirect_multi_kern.c @@ -0,0 +1,94 @@ +// SPDX-License-Identifier: GPL-2.0 +#define KBUILD_MODNAME "foo" +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +/* One map use devmap, another one use devmap_hash for testing */ +struct { + __uint(type, BPF_MAP_TYPE_DEVMAP); + __uint(key_size, sizeof(int)); + __uint(value_size, sizeof(int)); + __uint(max_entries, 1024); +} map_all SEC(".maps"); + +struct { + __uint(type, BPF_MAP_TYPE_DEVMAP_HASH); + __uint(key_size, sizeof(int)); + __uint(value_size, sizeof(struct bpf_devmap_val)); + __uint(max_entries, 128); +} map_egress SEC(".maps"); + +/* map to store egress interfaces mac addresses */ +struct { + __uint(type, BPF_MAP_TYPE_HASH); + __type(key, __u32); + __type(value, __be64); + __uint(max_entries, 128); +} mac_map SEC(".maps"); + +SEC("xdp_redirect_map_multi") +int xdp_redirect_map_multi_prog(struct xdp_md *ctx) +{ + void *data_end = (void *)(long)ctx->data_end; + void *data = (void *)(long)ctx->data; + int if_index = ctx->ingress_ifindex; + struct ethhdr *eth = data; + __u16 h_proto; + __u64 nh_off; + + nh_off = sizeof(*eth); + if (data + nh_off > data_end) + return XDP_DROP; + + h_proto = eth->h_proto; + + /* Using IPv4 for (BPF_F_BROADCAST | BPF_F_EXCLUDE_INGRESS) testing */ + if (h_proto == bpf_htons(ETH_P_IP)) + return bpf_redirect_map(&map_all, 0, + BPF_F_BROADCAST | BPF_F_EXCLUDE_INGRESS); + /* Using IPv6 for none flag testing */ + else if (h_proto == bpf_htons(ETH_P_IPV6)) + return bpf_redirect_map(&map_all, if_index, 0); + /* All others for BPF_F_BROADCAST testing */ + else + return bpf_redirect_map(&map_all, 0, BPF_F_BROADCAST); +} + +/* The following 2 progs are for 2nd devmap prog testing */ +SEC("xdp_redirect_map_ingress") +int xdp_redirect_map_all_prog(struct xdp_md *ctx) +{ + return bpf_redirect_map(&map_egress, 0, + BPF_F_BROADCAST | BPF_F_EXCLUDE_INGRESS); +} + +SEC("xdp_devmap/map_prog") +int xdp_devmap_prog(struct xdp_md *ctx) +{ + void *data_end = (void *)(long)ctx->data_end; + void *data = (void *)(long)ctx->data; + __u32 key = ctx->egress_ifindex; + struct ethhdr *eth = data; + __u64 nh_off; + __be64 *mac; + + nh_off = sizeof(*eth); + if (data + nh_off > data_end) + return XDP_DROP; + + mac = bpf_map_lookup_elem(&mac_map, &key); + if (mac) + __builtin_memcpy(eth->h_source, mac, ETH_ALEN); + + return XDP_PASS; +} + +char _license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/test_xdp_redirect_multi.sh b/tools/testing/selftests/bpf/test_xdp_redirect_multi.sh new file mode 100755 index 000000000000..1538373157e3 --- /dev/null +++ b/tools/testing/selftests/bpf/test_xdp_redirect_multi.sh @@ -0,0 +1,204 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Test topology: +# - - - - - - - - - - - - - - - - - - - - - - - - - +# | veth1 veth2 veth3 | ... init net +# - -| - - - - - - | - - - - - - | - - +# --------- --------- --------- +# | veth0 | | veth0 | | veth0 | ... +# --------- --------- --------- +# ns1 ns2 ns3 +# +# Test modules: +# XDP modes: generic, native, native + egress_prog +# +# Test cases: +# ARP: Testing BPF_F_BROADCAST, the ingress interface also should receive +# the redirects. +# ns1 -> gw: ns1, ns2, ns3, should receive the arp request +# IPv4: Testing BPF_F_BROADCAST | BPF_F_EXCLUDE_INGRESS, the ingress +# interface should not receive the redirects. +# ns1 -> gw: ns1 should not receive, ns2, ns3 should receive redirects. +# IPv6: Testing none flag, all the pkts should be redirected back +# ping test: ns1 -> ns2 (block), echo requests will be redirect back +# egress_prog: +# all src mac should be egress interface's mac + +# netns numbers +NUM=3 +IFACES="" +DRV_MODE="xdpgeneric xdpdrv xdpegress" +PASS=0 +FAIL=0 + +test_pass() +{ + echo "Pass: $@" + PASS=$((PASS + 1)) +} + +test_fail() +{ + echo "fail: $@" + FAIL=$((FAIL + 1)) +} + +clean_up() +{ + for i in $(seq $NUM); do + ip link del veth$i 2> /dev/null + ip netns del ns$i 2> /dev/null + done +} + +# Kselftest framework requirement - SKIP code is 4. +check_env() +{ + ip link set dev lo xdpgeneric off &>/dev/null + if [ $? -ne 0 ];then + echo "selftests: [SKIP] Could not run test without the ip xdpgeneric support" + exit 4 + fi + + which tcpdump &>/dev/null + if [ $? -ne 0 ];then + echo "selftests: [SKIP] Could not run test without tcpdump" + exit 4 + fi +} + +setup_ns() +{ + local mode=$1 + IFACES="" + + if [ "$mode" = "xdpegress" ]; then + mode="xdpdrv" + fi + + for i in $(seq $NUM); do + ip netns add ns$i + ip link add veth$i type veth peer name veth0 netns ns$i + ip link set veth$i up + ip -n ns$i link set veth0 up + + ip -n ns$i addr add 192.0.2.$i/24 dev veth0 + ip -n ns$i addr add 2001:db8::$i/64 dev veth0 + # Add a neigh entry for IPv4 ping test + ip -n ns$i neigh add 192.0.2.253 lladdr 00:00:00:00:00:01 dev veth0 + ip -n ns$i link set veth0 $mode obj \ + xdp_dummy.o sec xdp_dummy &> /dev/null || \ + { test_fail "Unable to load dummy xdp" && exit 1; } + IFACES="$IFACES veth$i" + veth_mac[$i]=$(ip link show veth$i | awk '/link\/ether/ {print $2}') + done +} + +do_egress_tests() +{ + local mode=$1 + + # mac test + ip netns exec ns2 tcpdump -e -i veth0 -nn -l -e &> mac_ns1-2_${mode}.log & + ip netns exec ns3 tcpdump -e -i veth0 -nn -l -e &> mac_ns1-3_${mode}.log & + sleep 0.5 + ip netns exec ns1 ping 192.0.2.254 -i 0.1 -c 4 &> /dev/null + sleep 0.5 + pkill -9 tcpdump + + # mac check + grep -q "${veth_mac[2]} > ff:ff:ff:ff:ff:ff" mac_ns1-2_${mode}.log && \ + test_pass "$mode mac ns1-2" || test_fail "$mode mac ns1-2" + grep -q "${veth_mac[3]} > ff:ff:ff:ff:ff:ff" mac_ns1-3_${mode}.log && \ + test_pass "$mode mac ns1-3" || test_fail "$mode mac ns1-3" +} + +do_ping_tests() +{ + local mode=$1 + + # ping6 test: echo request should be redirect back to itself, not others + ip netns exec ns1 ip neigh add 2001:db8::2 dev veth0 lladdr 00:00:00:00:00:02 + + ip netns exec ns1 tcpdump -i veth0 -nn -l -e &> ns1-1_${mode}.log & + ip netns exec ns2 tcpdump -i veth0 -nn -l -e &> ns1-2_${mode}.log & + ip netns exec ns3 tcpdump -i veth0 -nn -l -e &> ns1-3_${mode}.log & + sleep 0.5 + # ARP test + ip netns exec ns1 ping 192.0.2.254 -i 0.1 -c 4 &> /dev/null + # IPv4 test + ip netns exec ns1 ping 192.0.2.253 -i 0.1 -c 4 &> /dev/null + # IPv6 test + ip netns exec ns1 ping6 2001:db8::2 -i 0.1 -c 2 &> /dev/null + sleep 0.5 + pkill -9 tcpdump + + # All netns should receive the redirect arp requests + [ $(grep -c "who-has 192.0.2.254" ns1-1_${mode}.log) -gt 4 ] && \ + test_pass "$mode arp(F_BROADCAST) ns1-1" || \ + test_fail "$mode arp(F_BROADCAST) ns1-1" + [ $(grep -c "who-has 192.0.2.254" ns1-2_${mode}.log) -le 4 ] && \ + test_pass "$mode arp(F_BROADCAST) ns1-2" || \ + test_fail "$mode arp(F_BROADCAST) ns1-2" + [ $(grep -c "who-has 192.0.2.254" ns1-3_${mode}.log) -le 4 ] && \ + test_pass "$mode arp(F_BROADCAST) ns1-3" || \ + test_fail "$mode arp(F_BROADCAST) ns1-3" + + # ns1 should not receive the redirect echo request, others should + [ $(grep -c "ICMP echo request" ns1-1_${mode}.log) -eq 4 ] && \ + test_pass "$mode IPv4 (F_BROADCAST|F_EXCLUDE_INGRESS) ns1-1" || \ + test_fail "$mode IPv4 (F_BROADCAST|F_EXCLUDE_INGRESS) ns1-1" + [ $(grep -c "ICMP echo request" ns1-2_${mode}.log) -eq 4 ] && \ + test_pass "$mode IPv4 (F_BROADCAST|F_EXCLUDE_INGRESS) ns1-2" || \ + test_fail "$mode IPv4 (F_BROADCAST|F_EXCLUDE_INGRESS) ns1-2" + [ $(grep -c "ICMP echo request" ns1-3_${mode}.log) -eq 4 ] && \ + test_pass "$mode IPv4 (F_BROADCAST|F_EXCLUDE_INGRESS) ns1-3" || \ + test_fail "$mode IPv4 (F_BROADCAST|F_EXCLUDE_INGRESS) ns1-3" + + # ns1 should receive the echo request, ns2 should not + [ $(grep -c "ICMP6, echo request" ns1-1_${mode}.log) -eq 4 ] && \ + test_pass "$mode IPv6 (no flags) ns1-1" || \ + test_fail "$mode IPv6 (no flags) ns1-1" + [ $(grep -c "ICMP6, echo request" ns1-2_${mode}.log) -eq 0 ] && \ + test_pass "$mode IPv6 (no flags) ns1-2" || \ + test_fail "$mode IPv6 (no flags) ns1-2" +} + +do_tests() +{ + local mode=$1 + local drv_p + + case ${mode} in + xdpdrv) drv_p="-N";; + xdpegress) drv_p="-X";; + xdpgeneric) drv_p="-S";; + esac + + ./xdp_redirect_multi $drv_p $IFACES &> xdp_redirect_${mode}.log & + xdp_pid=$! + sleep 1 + + if [ "$mode" = "xdpegress" ]; then + do_egress_tests $mode + else + do_ping_tests $mode + fi + + kill $xdp_pid +} + +trap clean_up 0 2 3 6 9 + +check_env +rm -f xdp_redirect_*.log ns*.log mac_ns*.log + +for mode in ${DRV_MODE}; do + setup_ns $mode + do_tests $mode + clean_up +done + +echo "Summary: PASS $PASS, FAIL $FAIL" +[ $FAIL -eq 0 ] && exit 0 || exit 1 diff --git a/tools/testing/selftests/bpf/xdp_redirect_multi.c b/tools/testing/selftests/bpf/xdp_redirect_multi.c new file mode 100644 index 000000000000..3696a8f32c23 --- /dev/null +++ b/tools/testing/selftests/bpf/xdp_redirect_multi.c @@ -0,0 +1,226 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "bpf_util.h" +#include +#include + +#define MAX_IFACE_NUM 32 +#define MAX_INDEX_NUM 1024 + +static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST; +static int ifaces[MAX_IFACE_NUM] = {}; + +static void int_exit(int sig) +{ + __u32 prog_id = 0; + int i; + + for (i = 0; ifaces[i] > 0; i++) { + if (bpf_get_link_xdp_id(ifaces[i], &prog_id, xdp_flags)) { + printf("bpf_get_link_xdp_id failed\n"); + exit(1); + } + if (prog_id) + bpf_set_link_xdp_fd(ifaces[i], -1, xdp_flags); + } + + exit(0); +} + +static int get_mac_addr(unsigned int ifindex, void *mac_addr) +{ + char ifname[IF_NAMESIZE]; + struct ifreq ifr; + int fd, ret = -1; + + fd = socket(AF_INET, SOCK_DGRAM, 0); + if (fd < 0) + return ret; + + if (!if_indextoname(ifindex, ifname)) + goto err_out; + + strcpy(ifr.ifr_name, ifname); + + if (ioctl(fd, SIOCGIFHWADDR, &ifr) != 0) + goto err_out; + + memcpy(mac_addr, ifr.ifr_hwaddr.sa_data, 6 * sizeof(char)); + ret = 0; + +err_out: + close(fd); + return ret; +} + +static void usage(const char *prog) +{ + fprintf(stderr, + "usage: %s [OPTS] ...\n" + "OPTS:\n" + " -S use skb-mode\n" + " -N enforce native mode\n" + " -F force loading prog\n" + " -X load xdp program on egress\n", + prog); +} + +int main(int argc, char **argv) +{ + int prog_fd, group_all, mac_map; + struct bpf_program *ingress_prog, *egress_prog; + struct bpf_prog_load_attr prog_load_attr = { + .prog_type = BPF_PROG_TYPE_UNSPEC, + }; + int i, ret, opt, egress_prog_fd = 0; + struct bpf_devmap_val devmap_val; + bool attach_egress_prog = false; + unsigned char mac_addr[6]; + char ifname[IF_NAMESIZE]; + struct bpf_object *obj; + unsigned int ifindex; + char filename[256]; + + while ((opt = getopt(argc, argv, "SNFX")) != -1) { + switch (opt) { + case 'S': + xdp_flags |= XDP_FLAGS_SKB_MODE; + break; + case 'N': + /* default, set below */ + break; + case 'F': + xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; + break; + case 'X': + attach_egress_prog = true; + break; + default: + usage(basename(argv[0])); + return 1; + } + } + + if (!(xdp_flags & XDP_FLAGS_SKB_MODE)) { + xdp_flags |= XDP_FLAGS_DRV_MODE; + } else if (attach_egress_prog) { + printf("Load xdp program on egress with SKB mode not supported yet\n"); + goto err_out; + } + + if (optind == argc) { + printf("usage: %s ...\n", argv[0]); + goto err_out; + } + + printf("Get interfaces"); + for (i = 0; i < MAX_IFACE_NUM && argv[optind + i]; i++) { + ifaces[i] = if_nametoindex(argv[optind + i]); + if (!ifaces[i]) + ifaces[i] = strtoul(argv[optind + i], NULL, 0); + if (!if_indextoname(ifaces[i], ifname)) { + perror("Invalid interface name or i"); + goto err_out; + } + if (ifaces[i] > MAX_INDEX_NUM) { + printf("Interface index to large\n"); + goto err_out; + } + printf(" %d", ifaces[i]); + } + printf("\n"); + + snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); + prog_load_attr.file = filename; + + if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd)) + goto err_out; + + if (attach_egress_prog) + group_all = bpf_object__find_map_fd_by_name(obj, "map_egress"); + else + group_all = bpf_object__find_map_fd_by_name(obj, "map_all"); + mac_map = bpf_object__find_map_fd_by_name(obj, "mac_map"); + + if (group_all < 0 || mac_map < 0) { + printf("bpf_object__find_map_fd_by_name failed\n"); + goto err_out; + } + + if (attach_egress_prog) { + /* Find ingress/egress prog for 2nd xdp prog */ + ingress_prog = bpf_object__find_program_by_name(obj, "xdp_redirect_map_all_prog"); + egress_prog = bpf_object__find_program_by_name(obj, "xdp_devmap_prog"); + if (!ingress_prog || !egress_prog) { + printf("finding ingress/egress_prog in obj file failed\n"); + goto err_out; + } + prog_fd = bpf_program__fd(ingress_prog); + egress_prog_fd = bpf_program__fd(egress_prog); + if (prog_fd < 0 || egress_prog_fd < 0) { + printf("find egress_prog fd failed\n"); + goto err_out; + } + } + + signal(SIGINT, int_exit); + signal(SIGTERM, int_exit); + + /* Init forward multicast groups and exclude group */ + for (i = 0; ifaces[i] > 0; i++) { + ifindex = ifaces[i]; + + if (attach_egress_prog) { + ret = get_mac_addr(ifindex, mac_addr); + if (ret < 0) { + printf("get interface %d mac failed\n", ifindex); + goto err_out; + } + ret = bpf_map_update_elem(mac_map, &ifindex, mac_addr, 0); + if (ret) { + perror("bpf_update_elem mac_map failed\n"); + goto err_out; + } + } + + /* Add all the interfaces to group all */ + devmap_val.ifindex = ifindex; + devmap_val.bpf_prog.fd = egress_prog_fd; + ret = bpf_map_update_elem(group_all, &ifindex, &devmap_val, 0); + if (ret) { + perror("bpf_map_update_elem"); + goto err_out; + } + + /* bind prog_fd to each interface */ + ret = bpf_set_link_xdp_fd(ifindex, prog_fd, xdp_flags); + if (ret) { + printf("Set xdp fd failed on %d\n", ifindex); + goto err_out; + } + } + + /* sleep some time for testing */ + sleep(999); + + return 0; + +err_out: + return 1; +}