selftests: fib_tests: Add test cases for netdev down

Check that IPv4 and IPv6 react the same when a netdev is being put
administratively down.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 141 insertions, 0 deletions

diff --git a/tools/testing/selftests/net/fib_tests.sh b/tools/testing/selftests/net/fib_tests.sh
index 767d2ab2385d..25ba74f8a37e 100755
--- a/tools/testing/selftests/net/fib_tests.sh
+++ b/tools/testing/selftests/net/fib_tests.sh
@@ -120,9 +120,150 @@ fib_unreg_test()
         fib_unreg_multipath_test
 }
 
+fib_down_unicast_test()
+{
+        ret=0
+
+        netns_create "testns"
+
+        ip netns exec testns ip link add dummy0 type dummy
+        ip netns exec testns ip link set dev dummy0 up
+
+        ip netns exec testns ip address add 198.51.100.1/24 dev dummy0
+        ip netns exec testns ip -6 address add 2001:db8:1::1/64 dev dummy0
+
+        ip netns exec testns ip route get fibmatch 198.51.100.2 &> /dev/null
+        check_err $?
+        ip netns exec testns ip -6 route get fibmatch 2001:db8:1::2 &> /dev/null
+        check_err $?
+
+        ip netns exec testns ip link set dev dummy0 down
+        check_err $?
+
+        ip netns exec testns ip route get fibmatch 198.51.100.2 &> /dev/null
+        check_fail $?
+        ip netns exec testns ip -6 route get fibmatch 2001:db8:1::2 &> /dev/null
+        check_fail $?
+
+        ip netns exec testns ip link del dev dummy0
+
+        ip netns del testns
+
+        if [ $ret -ne 0 ]; then
+                echo "FAIL: unicast route test"
+                return 1
+        fi
+        echo "PASS: unicast route test"
+}
+
+fib_down_multipath_test_do()
+{
+        local down_dev=$1
+        local up_dev=$2
+
+        ip netns exec testns ip route get fibmatch 203.0.113.1 \
+                oif $down_dev &> /dev/null
+        check_fail $?
+        ip netns exec testns ip -6 route get fibmatch 2001:db8:3::1 \
+                oif $down_dev &> /dev/null
+        check_fail $?
+
+        ip netns exec testns ip route get fibmatch 203.0.113.1 \
+                oif $up_dev &> /dev/null
+        check_err $?
+        ip netns exec testns ip -6 route get fibmatch 2001:db8:3::1 \
+                oif $up_dev &> /dev/null
+        check_err $?
+
+        ip netns exec testns ip route get fibmatch 203.0.113.1 | \
+                grep $down_dev | grep -q "dead linkdown"
+        check_err $?
+        ip netns exec testns ip -6 route get fibmatch 2001:db8:3::1 | \
+                grep $down_dev | grep -q "dead linkdown"
+        check_err $?
+
+        ip netns exec testns ip route get fibmatch 203.0.113.1 | \
+                grep $up_dev | grep -q "dead linkdown"
+        check_fail $?
+        ip netns exec testns ip -6 route get fibmatch 2001:db8:3::1 | \
+                grep $up_dev | grep -q "dead linkdown"
+        check_fail $?
+}
+
+fib_down_multipath_test()
+{
+        ret=0
+
+        netns_create "testns"
+
+        ip netns exec testns ip link add dummy0 type dummy
+        ip netns exec testns ip link set dev dummy0 up
+
+        ip netns exec testns ip link add dummy1 type dummy
+        ip netns exec testns ip link set dev dummy1 up
+
+        ip netns exec testns ip address add 198.51.100.1/24 dev dummy0
+        ip netns exec testns ip -6 address add 2001:db8:1::1/64 dev dummy0
+
+        ip netns exec testns ip address add 192.0.2.1/24 dev dummy1
+        ip netns exec testns ip -6 address add 2001:db8:2::1/64 dev dummy1
+
+        ip netns exec testns ip route add 203.0.113.0/24 \
+                nexthop via 198.51.100.2 dev dummy0 \
+                nexthop via 192.0.2.2 dev dummy1
+        ip netns exec testns ip -6 route add 2001:db8:3::/64 \
+                nexthop via 2001:db8:1::2 dev dummy0 \
+                nexthop via 2001:db8:2::2 dev dummy1
+
+        ip netns exec testns ip route get fibmatch 203.0.113.1 &> /dev/null
+        check_err $?
+        ip netns exec testns ip -6 route get fibmatch 2001:db8:3::1 &> /dev/null
+        check_err $?
+
+        ip netns exec testns ip link set dev dummy0 down
+        check_err $?
+
+        fib_down_multipath_test_do "dummy0" "dummy1"
+
+        ip netns exec testns ip link set dev dummy0 up
+        check_err $?
+        ip netns exec testns ip link set dev dummy1 down
+        check_err $?
+
+        fib_down_multipath_test_do "dummy1" "dummy0"
+
+        ip netns exec testns ip link set dev dummy0 down
+        check_err $?
+
+        ip netns exec testns ip route get fibmatch 203.0.113.1 &> /dev/null
+        check_fail $?
+        ip netns exec testns ip -6 route get fibmatch 2001:db8:3::1 &> /dev/null
+        check_fail $?
+
+        ip netns exec testns ip link del dev dummy1
+        ip netns exec testns ip link del dev dummy0
+
+        ip netns del testns
+
+        if [ $ret -ne 0 ]; then
+                echo "FAIL: multipath route test"
+                return 1
+        fi
+        echo "PASS: multipath route test"
+}
+
+fib_down_test()
+{
+        echo "Running netdev down tests"
+
+        fib_down_unicast_test
+        fib_down_multipath_test
+}
+
 fib_test()
 {
         fib_unreg_test
+        fib_down_test
 }
 
 if [ "$(id -u)" -ne 0 ];then