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selftests: icmp_redirect: IPv6 PMTU info should be cleared after redirect

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[ Upstream commit 0e02bf5de4 ]

After redirecting, it's already a new path. So the old PMTU info should
be cleared. The IPv6 test "mtu exception plus redirect" should only
has redirect info without old PMTU.

The IPv4 test can not be changed because of legacy.

Fixes: ec81053528 ("selftests: Add redirect tests")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Hangbin Liu 2021-07-07 16:15:30 +08:00 • committed by Greg Kroah-Hartman
commit f1edbcc47f
1 changed files with 3 additions and 2 deletions
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5
tools/testing/selftests/net/icmp_redirect.sh
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@ -309,9 +309,10 @@ check_exception()
fi
log_test $? 0 "IPv4: ${desc}"
if [ "$with_redirect" = "yes" ]; then
# No PMTU info for test "redirect" and "mtu exception plus redirect"
if [ "$with_redirect" = "yes" ] && [ "$desc" != "redirect exception plus mtu" ]; then
ip -netns h1 -6 ro get ${H1_VRF_ARG} ${H2_N2_IP6} | \
grep -q "${H2_N2_IP6} .*via ${R2_LLADDR} dev br0.*${mtu}"
grep -v "mtu" | grep -q "${H2_N2_IP6} .*via ${R2_LLADDR} dev br0"
elif [ -n "${mtu}" ]; then
ip -netns h1 -6 ro get ${H1_VRF_ARG} ${H2_N2_IP6} | \
grep -q "${mtu}"