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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2018 Facebook
set -eu
wait_for_ip()
{
local _i
echo -n "Wait for testing link-local IP to become available "
for _i in $(seq ${MAX_PING_TRIES}); do
echo -n "."
if ping -6 -q -c 1 -W 1 ff02::1%${TEST_IF} >/dev/null 2>&1; then
echo " OK"
return
fi
sleep 1
done
echo 1>&2 "ERROR: Timeout waiting for test IP to become available."
exit 1
}
setup()
{
# Create testing interfaces not to interfere with current environment.
ip link add dev ${TEST_IF} type veth peer name ${TEST_IF_PEER}
ip link set ${TEST_IF} up
ip link set ${TEST_IF_PEER} up
wait_for_ip
tc qdisc add dev ${TEST_IF} clsact
tc filter add dev ${TEST_IF} egress bpf obj ${BPF_PROG_OBJ} \
sec ${BPF_PROG_SECTION} da
BPF_PROG_ID=$(tc filter show dev ${TEST_IF} egress | \
awk '/ id / {sub(/.* id /, "", $0); print($1)}')
}
cleanup()
{
ip link del ${TEST_IF} 2>/dev/null || :
ip link del ${TEST_IF_PEER} 2>/dev/null || :
}
main()
{
trap cleanup EXIT 2 3 6 15
setup
${PROG} ${TEST_IF} ${BPF_PROG_ID}
}
DIR=$(dirname $0)
TEST_IF="test_cgid_1"
TEST_IF_PEER="test_cgid_2"
MAX_PING_TRIES=5
BPF_PROG_OBJ="${DIR}/test_skb_cgroup_id_kern.o"
BPF_PROG_SECTION="cgroup_id_logger"
BPF_PROG_ID=0
PROG="${DIR}/test_skb_cgroup_id_user"
main
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