linux/samples/bpf/test_cgrp2_sock.sh
David Ahern ad2805dc79 samples: bpf: add userspace example for modifying sk_bound_dev_if
Add a simple program to demonstrate the ability to attach a bpf program
to a cgroup that sets sk_bound_dev_if for AF_INET{6} sockets when they
are created.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-02 13:46:08 -05:00

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#!/bin/bash
function config_device {
ip netns add at_ns0
ip link add veth0 type veth peer name veth0b
ip link set veth0b up
ip link set veth0 netns at_ns0
ip netns exec at_ns0 ip addr add 172.16.1.100/24 dev veth0
ip netns exec at_ns0 ip addr add 2401:db00::1/64 dev veth0 nodad
ip netns exec at_ns0 ip link set dev veth0 up
ip link add foo type vrf table 1234
ip link set foo up
ip addr add 172.16.1.101/24 dev veth0b
ip addr add 2401:db00::2/64 dev veth0b nodad
ip link set veth0b master foo
}
function attach_bpf {
rm -rf /tmp/cgroupv2
mkdir -p /tmp/cgroupv2
mount -t cgroup2 none /tmp/cgroupv2
mkdir -p /tmp/cgroupv2/foo
test_cgrp2_sock /tmp/cgroupv2/foo foo
echo $$ >> /tmp/cgroupv2/foo/cgroup.procs
}
function cleanup {
set +ex
ip netns delete at_ns0
ip link del veth0
ip link del foo
umount /tmp/cgroupv2
rm -rf /tmp/cgroupv2
set -ex
}
function do_test {
ping -c1 -w1 172.16.1.100
ping6 -c1 -w1 2401:db00::1
}
cleanup 2>/dev/null
config_device
attach_bpf
do_test
cleanup
echo "*** PASS ***"