From: Petr Machata <petrm@mellanox.com>
Date: Thu, 3 May 2018 10:36:59 +0000 (+0200)
Subject: selftests: forwarding: lib: Add sysctl_set(), sysctl_restore()
X-Git-Tag: v4.19~872^2~317^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f5ae57784ba805d0e8b11db1a7b2c17c5a07dd70;p=platform%2Fkernel%2Flinux-rpi.git

selftests: forwarding: lib: Add sysctl_set(), sysctl_restore()

Add two helper functions: sysctl_set() to change the value of a given
sysctl setting, and sysctl_restore() to change it back to what it was.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh
index 061c87b..e49e78b 100644
--- a/tools/testing/selftests/net/forwarding/lib.sh
+++ b/tools/testing/selftests/net/forwarding/lib.sh
@@ -381,6 +381,23 @@ bridge_ageing_time_get()
 	echo $((ageing_time / 100))
 }
 
+declare -A SYSCTL_ORIG
+sysctl_set()
+{
+	local key=$1; shift
+	local value=$1; shift
+
+	SYSCTL_ORIG[$key]=$(sysctl -n $key)
+	sysctl -qw $key=$value
+}
+
+sysctl_restore()
+{
+	local key=$1; shift
+
+	sysctl -qw $key=${SYSCTL_ORIG["$key"]}
+}
+
 forwarding_enable()
 {
        ipv4_fwd=$(sysctl -n net.ipv4.conf.all.forwarding)