svn commit: r208213 - head/etc

[John Baldwin]

Author: jhb
Date: Mon May 17 19:51:34 2010
New Revision: 208213
URL: http://svn.freebsd.org/changeset/base/208213

Log:
  Prevent unloading a kld for a driver that has subinterfaces (vlan and/or
  wlan interfaces) from being automatically reloaded via devd shutdown
  event handlers.
  - Revert part of my previous changes to call ifn_stop on subinterfaces
    when an interface is detached.  It is better to destroy the interfaces
    first so that an 'ifconfig foo0.blah down' doesn't result in ifconfig
    auto-loading if_foo.ko.  The ifconfig command will not be invoked if
    foo0.blah is gone when ifn_stop() is called.  Furthermore, it is not
    necessary to explicitly invoke ifn_stop() after the subinterface is
    destroyed as devd will already do that.
  - Pass -n to ifconfig when destroying interfaces so that destroying a
    cloned interface does not kldload any drivers.
  
  Reviewed by:	dougb
  MFC after:	4 days

Modified:
  head/etc/network.subr

Modified: head/etc/network.subr
==============================================================================
--- head/etc/network.subr	Mon May 17 19:36:56 2010	(r208212)
+++ head/etc/network.subr	Mon May 17 19:51:34 2010	(r208213)
@@ -917,7 +917,7 @@ clone_down()
 	_list=
 
 	for ifn in ${cloned_interfaces}; do
-		ifconfig ${ifn} destroy
+		ifconfig -n ${ifn} destroy
 		if [ $? -eq 0 ]; then
 			_list="${_list}${_prefix}${ifn}"
 			[ -z "$_prefix" ] && _prefix=' '
@@ -1002,10 +1002,7 @@ childif_destroy()
 		if ! ifexists $child; then
 			continue
 		fi
-		if autoif $child; then
-			ifn_stop $child
-		fi
-		ifconfig $child destroy && cfg=0
+		ifconfig -n $child destroy && cfg=0
 	done
 
 	child_vlans=`get_if_var $ifn vlans_IF`
@@ -1016,10 +1013,7 @@ childif_destroy()
 		if ! ifexists $child; then
 			continue
 		fi
-		if autoif $child; then
-			ifn_stop $child
-		fi
-		ifconfig $child destroy && cfg=0
+		ifconfig -n $child destroy && cfg=0
 	done
 
 	return ${cfg}