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[net-next,2/3] selftests: mlxsw: lib.sh: Add wait for dev with timeout

Message ID 20190610084045.6029-3-idosch@idosch.org
State Changes Requested
Delegated to: David Miller
Headers show
Series mlxsw: Add speed and auto-negotiation test | expand

Commit Message

Ido Schimmel June 10, 2019, 8:40 a.m. UTC 
From: Amit Cohen <amitc@mellanox.com>

Add a function that waits for device with maximum number of iterations.
It enables to limit the waiting and prevent infinite loop.

This will be used by the subsequent patch which will set two ports to
different speeds in order to make sure they cannot negotiate a link.

Signed-off-by: Amit Cohen <amitc@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
---
 tools/testing/selftests/net/forwarding/lib.sh | 28 +++++++++++++++++--
 1 file changed, 25 insertions(+), 3 deletions(-)
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Patch

diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh
index 9385dc971269..cd362d14d6c6 100644
--- a/tools/testing/selftests/net/forwarding/lib.sh
+++ b/tools/testing/selftests/net/forwarding/lib.sh
@@ -18,6 +18,7 @@  NETIF_CREATE=${NETIF_CREATE:=yes}
 MCD=${MCD:=smcrouted}
 MC_CLI=${MC_CLI:=smcroutectl}
 PING_TIMEOUT=${PING_TIMEOUT:=5}
+WAIT_TIMEOUT=${WAIT_TIMEOUT:=20}
 
 relative_path="${BASH_SOURCE%/*}"
 if [[ "$relative_path" == "${BASH_SOURCE}" ]]; then
@@ -226,24 +227,45 @@  log_info()
 setup_wait_dev()
 {
 	local dev=$1; shift
+	local wait_time=${1:-$WAIT_TIME}; shift
 
-	while true; do
+	setup_wait_dev_with_timeout "$dev" 600 $wait_time
+
+	if (($?)); then
+		check_err 1
+		log_test setup_wait_dev ": Interface $dev does not come up."
+		exit 0
+	fi
+}
+
+setup_wait_dev_with_timeout()
+{
+	local dev=$1; shift
+	local max_iterations=${1:-$WAIT_TIMEOUT}; shift
+	local wait_time=${1:-$WAIT_TIME}; shift
+	local i
+
+	for ((i = 1; i <= $max_iterations; ++i)); do
 		ip link show dev $dev up \
 			| grep 'state UP' &> /dev/null
 		if [[ $? -ne 0 ]]; then
 			sleep 1
 		else
-			break
+			sleep $wait_time
+			return 0
 		fi
 	done
+
+	return 1
 }
 
 setup_wait()
 {
 	local num_netifs=${1:-$NUM_NETIFS}
+	local i
 
 	for ((i = 1; i <= num_netifs; ++i)); do
-		setup_wait_dev ${NETIFS[p$i]}
+		setup_wait_dev ${NETIFS[p$i]} 0
 	done
 
 	# Make sure links are ready.