V_irtualize the if_clone framework, thus allowing for clonable ifnets

to optionally have overlapping unit numbers if attached in different
vnets.

At this stage if_loop is the only clonable ifnet class that has been
extended to allow for such overlapping allocation of unit numbers, i.e.
in each vnet it is possible to have a lo0 interface.  Other clonable ifnet
classes remain to operate with traditional semantics, i.e. each instance
of a clonable ifnet will be assigned a globally unique unit number,
regardless in which vnet such an ifnet becomes instantiated.

While here, garbage collect unused _lo_list field in struct vnet_net,
as well as improve indentation for #defines in sys/net/vnet.h.

The layout of struct vnet_net has changed, therefore bump
__FreeBSD_version.

This change has no functional impact on nooptions VIMAGE kernel builds.

Reviewed by:	bz, brooks
Approved by:	julian (mentor)

1 files changed, 5 insertions, 0 deletions

diff --git a/UPDATING b/UPDATING
index 8ef1991..85a005a 100644
--- a/UPDATING
+++ b/UPDATING
@@ -23,6 +23,11 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 8.x IS SLOW:
 	ln -s aj /etc/malloc.conf.)
 
 20090523:
+	The layout of struct vnet_net has changed, therefore modules
+	need to be rebuilt.
+	Bump __FreeBSD_version to 800090.
+
+20090523:
 	The newly imported zic(8) produces a new format in the
 	output. Please run tzsetup(8) to install the newly created
 	data to /etc/localtime.