Add support for DHCP on bridges (#125259, original patch by Anders Kaseorg

<anders@kaseorg.com>):
- rc.d/init.d/network: Initialize bridges after bridged interfaces,
  deinitialize them before bridged interfaces
- sysconfig/network-scripts/ifdown-eth: Destroy bridges lazily when the last
  bridged interface is stopped
- sysconfig/network-scripts/ifup-eth:
  * Handle bridges before checking for module presence or wireless devices
  * Add bridges lazily when the first bridged interface is started

1 files changed, 4 insertions, 5 deletions

diff --git a/sysconfig/network-scripts/ifdown-eth b/sysconfig/network-scripts/ifdown-eth
index 55c02fbd..6651c93f 100755
--- a/sysconfig/network-scripts/ifdown-eth
+++ b/sysconfig/network-scripts/ifdown-eth
@@ -26,8 +26,11 @@ if [ -n "${BRIDGE}" -a -x /usr/sbin/brctl ]; then
       # Upon removing a device from a bridge,
       # it's necessary to make radvd reload its config
       [ -r /var/run/radvd/radvd.pid ] && kill -HUP `cat /var/run/radvd/radvd.pid`
+      if LC_ALL=C /usr/sbin/brctl show | LC_ALL=C grep -q "^${BRIDGE}	.*can't get port info"; then
+	  /usr/sbin/brctl delbr ${BRIDGE}
+      fi
       exit 0
-fi 
+fi
 
 . /etc/sysconfig/network
 
@@ -108,10 +111,6 @@ if [ "$retcode" = 0 ] ; then
     # the interface went down.
 fi
 
-if [ "$TYPE" = "Bridge" -a -x /usr/sbin/brctl ]; then
-    /usr/sbin/brctl delbr ${DEVICE}
-fi
-
 if [ -n "$VLAN" -a -x /sbin/vconfig ]; then
     # 802.1q VLAN
     if echo ${DEVICE} | LANG=C egrep -v '(:)' | LANG=C egrep -q '(eth|bond)[0-9][0-9]*\.[0-9][0-9]?[0-9]?[0-9]?' \