network: wait for interfaces to come up, before proceeding

modules.d/40network/dhclient-script

@@ -17,6 +17,7 @@ setup_interface() {
 	echo ip link set $netif down
 	echo ip link set $netif mtu $mtu
 	echo ip link set $netif up
+	echo wait_for_if_up $netif
     fi > /tmp/net.$netif.up
 
     echo ip addr add $ip${mask:+/$mask} ${bcast:+broadcast $bcast} dev $netif >> /tmp/net.$netif.up
@@ -52,6 +53,7 @@ netif=$interface
 case $reason in
     PREINIT)
 	ip link set $netif up
+	wait_for_if_up $netif
 	;;
     BOUND)
 	setup_interface 

modules.d/40network/ifup

@@ -32,8 +32,9 @@ do_dhcp() {
 
 # Handle static ip configuration
 do_static() {
-{
+    {
 	echo ip link set $netif up 
+	echo wait_for_if_up $netif
 	echo ip addr flush dev $netif
 	echo ip addr add $ip/$mask dev $netif
     } > /tmp/net.$netif.up
@@ -89,6 +90,7 @@ fi
 # start bridge if necessary
 if [ "$netif" = "$bridgename" ] && [ ! -e /tmp/net.$bridgename.up ]; then
     ip link set $ethname up
+    wait_for_if_up $ethname
     # Create bridge and add eth to bridge
     brctl addbr $bridgename
     brctl setfd $bridgename 0

modules.d/99base/dracut-lib.sh

@@ -152,4 +152,13 @@ udevproperty() {
     fi
 }
 
-
+wait_for_if_up() {
+    local cnt=0
+    while [ $cnt -lt 20 ]; do 
+	li=$(ip link show $1)
+	[ -z "${li##*state UP*}" ] && return 0
+	sleep 0.1
+	cnt=$[cnt+1]
+    done 
+    return 1
+}