[PATCH net-next 02/10] selftests: forwarding: lib.sh: Validate NETIFS

[Petr Machata]

The variable should contain at least NUM_NETIFS interfaces, stored
as keys named "p$i", for i in `seq $NUM_NETIFS`.

Signed-off-by: Petr Machata <pe...@nvidia.com>
Reviewed-by: Benjamin Poirier <bpoir...@nvidia.com>
---
 tools/testing/selftests/net/forwarding/lib.sh | 22 ++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/tools/testing/selftests/net/forwarding/lib.sh 
b/tools/testing/selftests/net/forwarding/lib.sh
index 658e4e7bf4b9..3cbbc2fd4d7d 100644
--- a/tools/testing/selftests/net/forwarding/lib.sh
+++ b/tools/testing/selftests/net/forwarding/lib.sh
@@ -273,11 +273,6 @@ if [[ "$REQUIRE_MTOOLS" = "yes" ]]; then
        require_command mreceive
 fi
 
-if [[ ! -v NUM_NETIFS ]]; then
-       echo "SKIP: importer does not define \"NUM_NETIFS\""
-       exit $ksft_skip
-fi
-
 ##############################################################################
 # Command line options handling
 
@@ -296,6 +291,23 @@ done
 ##############################################################################
 # Network interfaces configuration
 
+if [[ ! -v NUM_NETIFS ]]; then
+       echo "SKIP: importer does not define \"NUM_NETIFS\""
+       exit $ksft_skip
+fi
+
+if (( NUM_NETIFS > ${#NETIFS[@]} )); then
+       echo "SKIP: Importer requires $NUM_NETIFS NETIFS, but only 
${#NETIFS[@]} are defined (${NETIFS[@]})"
+       exit $ksft_skip
+fi
+
+for i in $(seq ${#NETIFS[@]}); do
+       if [[ ! ${NETIFS[p$i]} ]]; then
+               echo "SKIP: NETIFS[p$i] not given"
+               exit $ksft_skip
+       fi
+done
+
 create_netif_veth()
 {
        local i
-- 
2.43.0