netdev - [patch net-next 5/6] selftests: forwarding: add wait_for

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Message-ID: <20240412151314.3365034-6-jiri@resnulli.us>
Date: Fri, 12 Apr 2024 17:13:13 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: netdev@...r.kernel.org
Cc: kuba@...nel.org,
	pabeni@...hat.com,
	davem@...emloft.net,
	edumazet@...gle.com,
	parav@...dia.com,
	mst@...hat.com,
	jasowang@...hat.com,
	xuanzhuo@...ux.alibaba.com,
	shuah@...nel.org,
	petrm@...dia.com,
	liuhangbin@...il.com,
	vladimir.oltean@....com,
	bpoirier@...dia.com,
	idosch@...dia.com,
	virtualization@...ts.linux.dev
Subject: [patch net-next 5/6] selftests: forwarding: add wait_for_dev() helper

From: Jiri Pirko <jiri@...dia.com>

The existing setup_wait*() helper family check the status of the
interface to be up. Introduce wait_for_dev() to wait for the netdevice
to appear, for example after test script does manual device bind.

Signed-off-by: Jiri Pirko <jiri@...dia.com>
---
 tools/testing/selftests/net/forwarding/lib.sh | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh
index 959183b516ce..74859f969997 100644
--- a/tools/testing/selftests/net/forwarding/lib.sh
+++ b/tools/testing/selftests/net/forwarding/lib.sh
@@ -746,6 +746,25 @@ setup_wait()
 	sleep $WAIT_TIME
 }
 
+wait_for_dev()
+{
+	local dev=$1; shift
+	local timeout=${1:-$WAIT_TIMEOUT}; shift
+	local max_iterations=$(($timeout * 10))
+
+	for ((i = 1; i <= $max_iterations; ++i)); do
+		ip link show dev $dev up &> /dev/null
+		if [[ $? -ne 0 ]]; then
+			sleep 0.1
+		else
+			return 0
+		fi
+	done
+
+	log_test wait_for_dev ": Interface $dev did not appear."
+	exit 1
+}
+
 cmd_jq()
 {
 	local cmd=$1
-- 
2.44.0