From ef3e622dc86cf8c23cb643a3c1850ca8edaec27a Mon Sep 17 00:00:00 2001
From: Holger Levsen <holger@layer-acht.org>
Date: Thu, 30 Mar 2017 16:27:23 +0200
Subject: reproducible Debian: set eth's MTU to 1500 on boot, if it's not set
 to 1500

Signed-off-by: Holger Levsen <holger@layer-acht.org>
---
 hosts/wbd0-armhf-rb/etc/rc.local | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'hosts/wbd0-armhf-rb/etc/rc.local')

diff --git a/hosts/wbd0-armhf-rb/etc/rc.local b/hosts/wbd0-armhf-rb/etc/rc.local
index 7a3ac282..9248a7a7 100755
--- a/hosts/wbd0-armhf-rb/etc/rc.local
+++ b/hosts/wbd0-armhf-rb/etc/rc.local
@@ -42,6 +42,16 @@ fixup_shm() {
 	chmod 1777 /dev/shm
 }
 
+fixup_mtu() {
+	# only act on systems which have eth0
+	if ip link show eth0 >/dev/null 2>&1 ; then
+		# if MTU != 1500 set it to 1500
+		if [ "$(ip link show eth0 | sed -n '/LOOPBACK\|NOARP/!s/.* mtu \([0-9]*\) .*/\1/p' )" != "1500" ] ; then
+			ip link set dev eth0 mtu 1500
+		fi
+	fi
+}
+
 #
 # init, notify about reboots
 #
@@ -78,6 +88,10 @@ esac
 #
 fixup_shm
 
+#
+# fixup eth0's MTU if needed
+fixup_mtu
+
 #
 # put schroots on tmpfs for non debian hosts
 #
-- 
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