qemu:virtio-net: Add additional MACs via a filter table (Alex Williamson)

Create a filter table and allow the guest to populate it with the
MAC class control commands.  We manage the size and usage of the
filter table including enabling promiscuous and all-multi modes
as necessary.  The guest should therefore assume the table is
infinite.  Eventually this might allow us to bind directly to a
hardware NIC and manipulate a physical MAC filter.

The specifics of the TABLE_SET command are documented in
virtio-net.h.  Separate buffers in the same command are used
for unicaste and multicast addresses for priority and
sychronization.  With this we can export the VIRTIO_NET_F_CTRL_RX
feature bit.

Signed-off-by: Alex Williamson <alex.williamson@hp.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6539 c046a42c-6fe2-441c-8c8c-71466251a162

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