selftests: pmtu: Use namespace command prefix to fetch route mtu

In 7af137b72131 ("selftests: net: Introduce first PMTU test") I
accidentally assumed route_get_* helpers would run from a single
namespace. Make them a bit more generic, by passing the
namespace command prefix as a parameter instead.

Fixes: 7af137b72131 ("selftests: net: Introduce first PMTU test")
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/net/pmtu.sh b/tools/testing/selftests/net/pmtu.sh
index 65842a2..0d010f9 100755 (executable)
--- a/tools/testing/selftests/net/pmtu.sh
+++ b/tools/testing/selftests/net/pmtu.sh
@@ -98,15 +98,17 @@ mtu() {
 }
 
 route_get_dst_exception() {
-       dst="${1}"
+       ns_cmd="${1}"
+       dst="${2}"
 
-       ${ns_a} ip route get "${dst}"
+       ${ns_cmd} ip route get "${dst}"
 }
 
 route_get_dst_pmtu_from_exception() {
-       dst="${1}"
+       ns_cmd="${1}"
+       dst="${2}"
 
-       exception="$(route_get_dst_exception ${dst})"
+       exception="$(route_get_dst_exception "${ns_cmd}" ${dst})"
        next=0
        for i in ${exception}; do
                [ ${next} -eq 1 ] && echo "${i}" && return
@@ -125,7 +127,7 @@ test_pmtu_vti6_exception() {
        ${ns_a} ping6 -q -i 0.1 -w 2 -s 60000 ${vti6_b_addr} > /dev/null
 
        # Check that exception was created
-       if [ "$(route_get_dst_pmtu_from_exception ${vti6_b_addr})" = "" ]; then
+       if [ "$(route_get_dst_pmtu_from_exception "${ns_a}" ${vti6_b_addr})" = "" ]; then
                echo "FAIL: Tunnel exceeding link layer MTU didn't create route exception"
                exit 1
        fi
@@ -133,14 +135,14 @@ test_pmtu_vti6_exception() {
        # Decrease tunnel MTU, check for PMTU decrease in route exception
        mtu "${ns_a}" vti_a 3000
 
-       if [ "$(route_get_dst_pmtu_from_exception ${vti6_b_addr})" -ne 3000 ]; then
+       if [ "$(route_get_dst_pmtu_from_exception "${ns_a}" ${vti6_b_addr})" -ne 3000 ]; then
                echo "FAIL: Decreasing tunnel MTU didn't decrease route exception PMTU"
                exit 1
        fi
 
        # Increase tunnel MTU, check for PMTU increase in route exception
        mtu "${ns_a}" vti_a 9000
-       if [ "$(route_get_dst_pmtu_from_exception ${vti6_b_addr})" -ne 9000 ]; then
+       if [ "$(route_get_dst_pmtu_from_exception "${ns_a}" ${vti6_b_addr})" -ne 9000 ]; then
                echo "FAIL: Increasing tunnel MTU didn't increase route exception PMTU"
                exit 1
        fi