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This patch enables chains that have a known prefix in their name. Known prefixes are: 'ipv4', 'ipv6', 'arp', 'rarp'. All prefixes are also protocols that can be evaluated on the ebtables level. Following the prefix they will be automatically connected to an interface's 'root' chain and jumped into following the protocol they evaluate, i.e., a table 'arp-xyz' will be accessed from the root table using ebtables -t nat -A <iface root table> -p arp -j I-<ifname>-arp-xyz thus generating a 'root' chain like this one here: Bridge chain: libvirt-O-vnet0, entries: 5, policy: ACCEPT -p IPv4 -j O-vnet0-ipv4 -p ARP -j O-vnet0-arp -p 0x8035 -j O-vnet0-rarp -p ARP -j O-vnet0-arp-xyz -j DROP where the chain 'arp-xyz' is accessed for filtering of ARP packets. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>