selftests: devlink_lib: add check for devlink device existence

If user passes devlink handle over DEVLINK_DEV variable, check if the
device exists.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20210527105515.790330-1-jiri@resnulli.us
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/tools/testing/selftests/net/forwarding/devlink_lib.sh b/tools/testing/selftests/net/forwarding/devlink_lib.sh
index 9c12c4f..c19e001 100644 (file)
--- a/tools/testing/selftests/net/forwarding/devlink_lib.sh
+++ b/tools/testing/selftests/net/forwarding/devlink_lib.sh
@@ -18,6 +18,12 @@ if [[ ! -v DEVLINK_DEV ]]; then
 
        DEVLINK_VIDDID=$(lspci -s $(echo $DEVLINK_DEV | cut -d"/" -f2) \
                         -n | cut -d" " -f3)
+else
+       devlink dev show $DEVLINK_DEV &> /dev/null
+       if [ $? -ne 0 ]; then
+               echo "SKIP: devlink device \"$DEVLINK_DEV\" not found"
+               exit 1
+       fi
 fi
 
 ##############################################################################