Commit f2b50f17 authored by Kal Conley's avatar Kal Conley Committed by Martin KaFai Lau
Browse files

selftests: xsk: Disable IPv6 on VETH1 



This change fixes flakiness in the BIDIRECTIONAL test:

    # [is_pkt_valid] expected length [60], got length [90]
    not ok 1 FAIL: SKB BUSY-POLL BIDIRECTIONAL

When IPv6 is enabled, the interface will periodically send MLDv1 and
MLDv2 packets. These packets can cause the BIDIRECTIONAL test to fail
since it uses VETH0 for RX.

For other tests, this was not a problem since they only receive on VETH1
and IPv6 was already disabled on VETH0.

Fixes: a8905257 ("selftests/bpf: Xsk selftests framework")
Signed-off-by: default avatarKal Conley <kal.conley@dectris.com>
Link: https://lore.kernel.org/r/20230405082905.6303-1-kal.conley@dectris.com


Signed-off-by: default avatarMartin KaFai Lau <martin.lau@kernel.org>
parent 756aaf2a

tools/testing/selftests/bpf/test_xsk.sh

+1 −0
Original line number Diff line number Diff line
@@ -116,6 +116,7 @@ setup_vethPairs() { 
	ip link add ${VETH0} numtxqueues 4 numrxqueues 4 type veth peer name ${VETH1} numtxqueues 4 numrxqueues 4

	if [ -f /proc/net/if_inet6 ]; then

		echo 1 > /proc/sys/net/ipv6/conf/${VETH0}/disable_ipv6

		echo 1 > /proc/sys/net/ipv6/conf/${VETH1}/disable_ipv6

	fi

	if [[ $verbose -eq 1 ]]; then

	        echo "setting up ${VETH1}"