File 0017-ifup-bridge-apply-stp-contstrains-when-STP-is-on.patch of Package sysconfig.openSUSE_12.1_Update

From 9f819dc649a92cb192abc5c0e7f29bb0fa89ae19 Mon Sep 17 00:00:00 2001
From: Marius Tomaschewski <mt@suse.com>
Date: Wed, 4 Apr 2012 17:33:08 +0200
Subject: [PATCH] ifup-bridge: apply stp contstrains when STP is on
 (bnc#753387)

---
 scripts/ifup-bridge |   29 +++++++++++++++++++++++++++++
 1 files changed, 29 insertions(+), 0 deletions(-)

diff --git a/scripts/ifup-bridge b/scripts/ifup-bridge
index e2e7c8f..ec04e49 100755
--- a/scripts/ifup-bridge
+++ b/scripts/ifup-bridge
@@ -89,6 +89,28 @@ test -f ./ifcfg-$CONFIG && . ./ifcfg-$CONFIG
 SYSFS="/sys/class/net"
 
 ######################################################################
+apply_constraints()
+{
+	local var=$1
+	local -i min=$(($2))
+	local -i max=$(($3))
+	local    def=$4
+
+	test -n "${!var}" || return
+	if   test $((${!var})) -lt $min ; then
+		def=${def:-$min}
+		message_if_not_run_from_rc \
+			"Warning: Correcting $var from ${!var} to $def"
+		eval "${var}=$def"
+	elif test $((${!var})) -gt $max ; then
+		def=${def:-$max}
+		message_if_not_run_from_rc \
+			"Warning: Correcting $var from ${!var} to $def"
+		eval "${var}=$def"
+	fi
+}
+
+######################################################################
 case $ACTION in
 up)
 
@@ -175,6 +197,13 @@ up)
 	# Set flags
 	[ -n "$BRIDGE_AGEINGTIME"   ] && brctl setageing     "$INTERFACE" "$BRIDGE_AGEINGTIME"
 	[ -n "$BRIDGE_STP"          ] && brctl stp           "$INTERFACE" "$BRIDGE_STP"
+	case $BRIDGE_STP in
+	on)
+		apply_constraints BRIDGE_FORWARDDELAY 4 30
+		apply_constraints BRIDGE_HELLOTIME    1  6
+		apply_constraints BRIDGE_MAXAGE       6 40
+	;;
+	esac
 	[ -n "$BRIDGE_PRIORITY"     ] && brctl setbridgeprio "$INTERFACE" "$BRIDGE_PRIORITY"
 	[ -n "$BRIDGE_FORWARDDELAY" ] && brctl setfd         "$INTERFACE" "$BRIDGE_FORWARDDELAY"
 	[ -n "$BRIDGE_HELLOTIME"    ] && brctl sethello      "$INTERFACE" "$BRIDGE_HELLOTIME"
-- 
1.7.7