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SPDX-License-Identifier: GPL-2.0 # Uncomment to see generated bytecode #VERBOSE=verbose NS1=lwt_ns1 NS2=lwt_ns2 VETH0=tst_lwt1a VETH1=tst_lwt1b VETH2=tst_lwt2a VETH3=tst_lwt2b IPVETH0="192.168.254.1" IPVETH1="192.168.254.2" IPVETH1b="192.168.254.3" IPVETH2="192.168.111.1" IPVETH3="192.168.111.2" IP_LOCAL="192.168.99.1" TRACE_ROOT=/sys/kernel/debug/tracing function lookup_mac() { set +x if [ ! -z "$2" ]; then MAC=$(ip netns exec $2 ip link show $1 | grep ether | awk '{print $2}') else MAC=$(ip link show $1 | grep ether | awk '{print $2}') fi MAC="${MAC//:/}" echo "0x${MAC:10:2}${MAC:8:2}${MAC:6:2}${MAC:4:2}${MAC:2:2}${MAC:0:2}" set -x } function cleanup { set +ex rm test_lwt_bpf.o 2> /dev/null ip link del $VETH0 2> /dev/null ip link del $VETH1 2> /dev/null ip link del $VETH2 2> /dev/null ip link del $VETH3 2> /dev/null ip netns exec $NS1 killall netserver ip netns delete $NS1 2> /dev/null ip netns delete $NS2 2> /dev/null set -ex } function setup_one_veth { ip netns add $1 ip link add $2 type veth peer name $3 ip link set dev $2 up ip addr add $4/24 dev $2 ip link set $3 netns $1 ip netns exec $1 ip link set dev $3 up ip netns exec $1 ip addr add $5/24 dev $3 if [ "$6" ]; then ip netns exec $1 ip addr add $6/32 dev $3 fi } function get_trace { set +x cat ${TRACE_ROOT}/trace | grep -v '^#' set -x } function cleanup_routes { ip route del ${IPVETH1}/32 dev $VETH0 2> /dev/null || true ip route del table local local ${IP_LOCAL}/32 dev lo 2> /dev/null || true } function install_test { cleanup_routes cp /dev/null ${TRACE_ROOT}/trace OPTS="encap bpf headroom 14 $1 obj test_lwt_bpf.o section $2 $VERBOSE" if [ "$1" == "in" ]; then ip route add table local local ${IP_LOCAL}/32 $OPTS dev lo else ip route add ${IPVETH1}/32 $OPTS dev $VETH0 fi } function remove_prog { if [ "$1" == "in" ]; then ip route del table local local ${IP_LOCAL}/32 dev lo else ip route del ${IPVETH1}/32 dev $VETH0 fi } function filter_trace { # Add newline to allow starting EXPECT= variables on newline NL=$'\n' echo "${NL}$*" | sed -e 's/^.*: : //g' } function expect_fail { set +x echo "FAIL:" echo "Expected: $1" echo "Got: $2" set -x exit 1 } function match_trace { set +x RET=0 TRACE=$1 EXPECT=$2 GOT="$(filter_trace "$TRACE")" [ "$GOT" != "$EXPECT" ] && { expect_fail "$EXPECT" "$GOT" RET=1 } set -x return $RET } function test_start { set +x echo "----------------------------------------------------------------" echo "Starting test: $*" echo "----------------------------------------------------------------" set -x } function failure { get_trace echo "FAIL: $*" exit 1 } function test_ctx_xmit { test_start "test_ctx on lwt xmit" install_test xmit test_ctx ping -c 3 $IPVETH1 || { failure "test_ctx xmit: packets are dropped" } match_trace "$(get_trace)" " len 84 hash 0 protocol 8 cb 1234 ingress_ifindex 0 ifindex $DST_IFINDEX len 84 hash 0 protocol 8 cb 1234 ingress_ifindex 0 ifindex $DST_IFINDEX len 84 hash 0 protocol 8 cb 1234 ingress_ifindex 0 ifindex $DST_IFINDEX" || exit 1 remove_prog xmit } function test_ctx_out { test_start "test_ctx on lwt out" install_test out test_ctx ping -c 3 $IPVETH1 || { failure "test_ctx out: packets are dropped" } match_trace "$(get_trace)" " len 84 hash 0 protocol 0 cb 1234 ingress_ifindex 0 ifindex 0 len 84 hash 0 protocol 0 cb 1234 ingress_ifindex 0 ifindex 0 len 84 hash 0 protocol 0 cb 1234 ingress_ifindex 0 ifindex 0" || exit 1 remove_prog out } function test_ctx_in { test_start "test_ctx on lwt in" install_test in test_ctx ping -c 3 $IP_LOCAL || { failure "test_ctx out: packets are dropped" } # We will both request & reply packets as the packets will # be from $IP_LOCAL => $IP_LOCAL match_trace "$(get_trace)" " len 84 hash 0 protocol 8 cb 1234 ingress_ifindex 1 ifindex 1 len 84 hash 0 protocol 8 cb 1234 ingress_ifindex 1 ifindex 1 len 84 hash 0 protocol 8 cb 1234 ingress_ifindex 1 ifindex 1 len 84 hash 0 protocol 8 cb 1234 ingress_ifindex 1 ifindex 1 len 84 hash 0 protocol 8 cb 1234 ingress_ifindex 1 ifindex 1 len 84 hash 0 protocol 8 cb 1234 ingress_ifindex 1 ifindex 1" || exit 1 remove_prog in } function test_data { test_start "test_data on lwt $1" install_test $1 test_data ping -c 3 $IPVETH1 || { failure "test_data ${1}: packets are dropped" } match_trace "$(get_trace)" " src: 1fea8c0 dst: 2fea8c0 src: 1fea8c0 dst: 2fea8c0 src: 1fea8c0 dst: 2fea8c0" || exit 1 remove_prog $1 } function test_data_in { test_start "test_data on lwt in" install_test in test_data ping -c 3 $IP_LOCAL || { failure "test_data in: packets are dropped" } # We will both request & reply packets as the packets will # be from $IP_LOCAL => $IP_LOCAL match_trace "$(get_trace)" " src: 163a8c0 dst: 163a8c0 src: 163a8c0 dst: 163a8c0 src: 163a8c0 dst: 163a8c0 src: 163a8c0 dst: 163a8c0 src: 163a8c0 dst: 163a8c0 src: 163a8c0 dst: 163a8c0" || exit 1 remove_prog in } function test_cb { test_start "test_cb on lwt $1" install_test $1 test_cb ping -c 3 $IPVETH1 || { failure "test_cb ${1}: packets are dropped" } match_trace "$(get_trace)" " cb0: 0 cb1: 0 cb2: 0 cb3: 0 cb4: 0 cb0: 0 cb1: 0 cb2: 0 cb3: 0 cb4: 0 cb0: 0 cb1: 0 cb2: 0 cb3: 0 cb4: 0" || exit 1 remove_prog $1 } function test_cb_in { test_start "test_cb on lwt in" install_test in test_cb ping -c 3 $IP_LOCAL || { failure "test_cb in: packets are dropped" } # We will both request & reply packets as the packets will # be from $IP_LOCAL => $IP_LOCAL match_trace "$(get_trace)" " cb0: 0 cb1: 0 cb2: 0 cb3: 0 cb4: 0 cb0: 0 cb1: 0 cb2: 0 cb3: 0 cb4: 0 cb0: 0 cb1: 0 cb2: 0 cb3: 0 cb4: 0 cb0: 0 cb1: 0 cb2: 0 cb3: 0 cb4: 0 cb0: 0 cb1: 0 cb2: 0 cb3: 0 cb4: 0 cb0: 0 cb1: 0 cb2: 0 cb3: 0 cb4: 0" || exit 1 remove_prog in } function test_drop_all { test_start "test_drop_all on lwt $1" install_test $1 drop_all ping -c 3 $IPVETH1 && { failure "test_drop_all ${1}: Unexpected success of ping" } match_trace "$(get_trace)" " dropping with: 2 dropping with: 2 dropping with: 2" || exit 1 remove_prog $1 } function test_drop_all_in { test_start "test_drop_all on lwt in" install_test in drop_all ping -c 3 $IP_LOCAL && { failure "test_drop_all in: Unexpected success of ping" } match_trace "$(get_trace)" " dropping with: 2 dropping with: 2 dropping with: 2" || exit 1 remove_prog in } function test_push_ll_and_redirect { test_start "test_push_ll_and_redirect on lwt xmit" install_test xmit push_ll_and_redirect ping -c 3 $IPVETH1 || { failure "Redirected packets appear to be dropped" } match_trace "$(get_trace)" " redirected to $DST_IFINDEX redirected to $DST_IFINDEX redirected to $DST_IFINDEX" || exit 1 remove_prog xmit } function test_no_l2_and_redirect { test_start "test_no_l2_and_redirect on lwt xmit" install_test xmit fill_garbage_and_redirect ping -c 3 $IPVETH1 && { failure "Unexpected success despite lack of L2 header" } match_trace "$(get_trace)" " redirected to $DST_IFINDEX redirected to $DST_IFINDEX redirected to $DST_IFINDEX" || exit 1 remove_prog xmit } function test_rewrite { test_start "test_rewrite on lwt xmit" install_test xmit test_rewrite ping -c 3 $IPVETH1 || { failure "Rewritten packets appear to be dropped" } match_trace "$(get_trace)" " out: rewriting from 2fea8c0 to 3fea8c0 out: rewriting from 2fea8c0 to 3fea8c0 out: rewriting from 2fea8c0 to 3fea8c0" || exit 1 remove_prog out } function test_fill_garbage { test_start "test_fill_garbage on lwt xmit" install_test xmit fill_garbage ping -c 3 $IPVETH1 && { failure "test_drop_all ${1}: Unexpected success of ping" } match_trace "$(get_trace)" " Set initial 96 bytes of header to FF Set initial 96 bytes of header to FF Set initial 96 bytes of header to FF" || exit 1 remove_prog xmit } function test_netperf_nop { test_start "test_netperf_nop on lwt xmit" install_test xmit nop netperf -H $IPVETH1 -t TCP_STREAM || { failure "packets appear to be dropped" } match_trace "$(get_trace)" ""|| exit 1 remove_prog xmit } function test_netperf_redirect { test_start "test_netperf_redirect on lwt xmit" install_test xmit push_ll_and_redirect_silent netperf -H $IPVETH1 -t TCP_STREAM || { failure "Rewritten packets appear to be dropped" } match_trace "$(get_trace)" ""|| exit 1 remove_prog xmit } cleanup setup_one_veth $NS1 $VETH0 $VETH1 $IPVETH0 $IPVETH1 $IPVETH1b setup_one_veth $NS2 $VETH2 $VETH3 $IPVETH2 $IPVETH3 ip netns exec $NS1 netserver echo 1 > ${TRACE_ROOT}/tracing_on DST_MAC=$(lookup_mac $VETH1 $NS1) SRC_MAC=$(lookup_mac $VETH0) DST_IFINDEX=$(cat /sys/class/net/$VETH0/ifindex) CLANG_OPTS="-O2 -target bpf -I ../include/" CLANG_OPTS+=" -DSRC_MAC=$SRC_MAC -DDST_MAC=$DST_MAC -DDST_IFINDEX=$DST_IFINDEX" clang $CLANG_OPTS -c test_lwt_bpf.c -o test_lwt_bpf.o test_ctx_xmit test_ctx_out test_ctx_in test_data "xmit" test_data "out" test_data_in test_cb "xmit" test_cb "out" test_cb_in test_drop_all "xmit" test_drop_all "out" test_drop_all_in test_rewrite test_push_ll_and_redirect test_no_l2_and_redirect test_fill_garbage test_netperf_nop test_netperf_redirect cleanup echo 0 > ${TRACE_ROOT}/tracing_on exit 0