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selftests: pmtu: maximum MTU for vti4 is 2^16-1-20

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[ Upstream commit 902b5417f2 ]

Since commit 82612de1c9 ("ip_tunnel: restore binding to ifaces with a
large mtu"), the maximum MTU for vti4 is based on IP_MAX_MTU instead of
the mysterious constant 0xFFF8.  This makes this selftest fail.

Fixes: 82612de1c9 ("ip_tunnel: restore binding to ifaces with a large mtu")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Acked-by: Stefano Brivio <sbrivio@redhat.com>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sabrina Dubroca
2018-10-10 08:55:55 +02:00
committed by Greg Kroah-Hartman
parent d65d1dd8be
commit ec0029c2ac
1 changed files with 1 additions and 1 deletions
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tools/testing/selftests/net/pmtu.sh
+1 -1
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@@ -334,7 +334,7 @@ test_pmtu_vti4_link_add_mtu() {
fail=0
min=68
max=$((65528 - 20))
max=$((65535 - 20))
# Check invalid values first
for v in $((min - 1)) $((max + 1)); do
${ns_a} ip link add vti4_a mtu ${v} type vti local ${veth4_a_addr} remote ${veth4_b_addr} key 10 2>/dev/null