linux-kernel - [net PATCH 1/2] selftests: net: lib: fix broken ping with coreutils ping util

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Message-ID: <20241130113314.6488-1-ansuelsmth@gmail.com>
Date: Sat, 30 Nov 2024 12:33:09 +0100
From: Christian Marangi <ansuelsmth@...il.com>
To: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Shuah Khan <shuah@...nel.org>,
	Petr Machata <petrm@...dia.com>,
	Benjamin Poirier <bpoirier@...dia.com>,
	Hangbin Liu <liuhangbin@...il.com>,
	Jiri Pirko <jiri@...nulli.us>,
	Vladimir Oltean <vladimir.oltean@....com>,
	Christian Marangi <ansuelsmth@...il.com>,
	Ido Schimmel <idosch@...dia.com>,
	netdev@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: stable@...r.kernel.org
Subject: [net PATCH 1/2] selftests: net: lib: fix broken ping with coreutils ping util

If the coreutils variant of ping is used instead of the busybox one, the
ping_do() command is broken. This comes by the fact that for coreutils
ping, the ping IP needs to be the very last elements.

To handle this, reorder the ping args and make $dip last element.

The use of coreutils ping might be useful for case where busybox is not
compiled with float interval support and ping command doesn't support
0.1 interval. (in such case a dedicated ping utility is installed
instead)

Cc: stable@...r.kernel.org
Fixes: 73bae6736b6b ("selftests: forwarding: Add initial testing framework")
Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
---
 tools/testing/selftests/net/forwarding/lib.sh | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh
index c992e385159c..2060f95d5c62 100644
--- a/tools/testing/selftests/net/forwarding/lib.sh
+++ b/tools/testing/selftests/net/forwarding/lib.sh
@@ -1473,8 +1473,8 @@ ping_do()
 
 	vrf_name=$(master_name_get $if_name)
 	ip vrf exec $vrf_name \
-		$PING $args $dip -c $PING_COUNT -i 0.1 \
-		-w $PING_TIMEOUT &> /dev/null
+		$PING $args -c $PING_COUNT -i 0.1 \
+		-w $PING_TIMEOUT $dip &> /dev/null
 }
 
 ping_test()
@@ -1504,8 +1504,8 @@ ping6_do()
 
 	vrf_name=$(master_name_get $if_name)
 	ip vrf exec $vrf_name \
-		$PING6 $args $dip -c $PING_COUNT -i 0.1 \
-		-w $PING_TIMEOUT &> /dev/null
+		$PING6 $args -c $PING_COUNT -i 0.1 \
+		-w $PING_TIMEOUT $dip &> /dev/null
 }
 
 ping6_test()
-- 
2.45.2