[PATCH net v2 05/17] selftests: forwarding: Set default IPv6 traceroute utility

[Ido Schimmel <idosch@nvidia.com>]

The test uses the 'TROUTE6' environment variable to encode the name of
the IPv6 traceroute utility. By default (without a configuration file),
this variable is not set, resulting in failures:

 # ./ip6_forward_instats_vrf.sh
 TEST: ping6                                                         [ OK ]
 TEST: Ip6InTooBigErrors                                             [ OK ]
 TEST: Ip6InHdrErrors                                                [FAIL]
 TEST: Ip6InAddrErrors                                               [ OK ]
 TEST: Ip6InDiscards                                                 [ OK ]

Fix by setting a default utility name and skip the test if the utility
is not present.

Fixes: 0857d6f8c759 ("ipv6: When forwarding count rx stats on the orig netdev")
Reported-by: Mirsad Todorovac <mirsad.todorovac@alu.unizg.hr>
Closes: https://lore.kernel.org/netdev/adc5e40d-d040-a65e-eb26-edf47dac5b02@alu.unizg.hr/
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Tested-by: Mirsad Todorovac <mirsad.todorovac@alu.unizg.hr>
---
Cc: ssuryaextr@gmail.com
---
 .../testing/selftests/net/forwarding/ip6_forward_instats_vrf.sh | 2 ++
 tools/testing/selftests/net/forwarding/lib.sh                   | 1 +
 2 files changed, 3 insertions(+)

diff --git a/tools/testing/selftests/net/forwarding/ip6_forward_instats_vrf.sh b/tools/testing/selftests/net/forwarding/ip6_forward_instats_vrf.sh
index 9f5b3e2e5e95..49fa94b53a1c 100755
--- a/tools/testing/selftests/net/forwarding/ip6_forward_instats_vrf.sh
+++ b/tools/testing/selftests/net/forwarding/ip6_forward_instats_vrf.sh
@@ -14,6 +14,8 @@ ALL_TESTS="
 NUM_NETIFS=4
 source lib.sh
 
+require_command $TROUTE6
+
 h1_create()
 {
 	simple_if_init $h1 2001:1:1::2/64
diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh
index 975fc5168c63..40a8c1541b7f 100755
--- a/tools/testing/selftests/net/forwarding/lib.sh
+++ b/tools/testing/selftests/net/forwarding/lib.sh
@@ -30,6 +30,7 @@ REQUIRE_MZ=${REQUIRE_MZ:=yes}
 REQUIRE_MTOOLS=${REQUIRE_MTOOLS:=no}
 STABLE_MAC_ADDRS=${STABLE_MAC_ADDRS:=no}
 TCPDUMP_EXTRA_FLAGS=${TCPDUMP_EXTRA_FLAGS:=}
+TROUTE6=${TROUTE6:=traceroute6}
 
 relative_path="${BASH_SOURCE%/*}"
 if [[ "$relative_path" == "${BASH_SOURCE}" ]]; then
-- 
2.40.1