Re: [PATCH v4 net-next 0/6] net/ipv6: Address checks need to consider the L3 domain

From: David Ahern <redacted>
Date: Tue, 13 Mar 2018 08:29:35 -0700

IPv6 prohibits a local address from being used as a gateway for a route.
However, it is ok for the gateway to be a local address in a different L3
domain (e.g., VRF). This allows, for example, veth pairs to connect VRFs.

ip6_route_info_create calls ipv6_chk_addr_and_flags for gateway addresses
to determine if the address is a local one, but ipv6_chk_addr_and_flags
does not currently consider L3 domains. As a result routes can not be
added in one VRF with a nexthop that points to a local address in a
second VRF.

Resolve by comparing the l3mdev for the passed in device and requiring an
l3mdev match with the device containing an address. The intent of checking
for an address on the specified device versus any device in the domain is
mantained by a new argument to skip the check between the passed in device
and the device with the address.

 ...

Series applied, thanks David.

I'd also like to echo Ido's sentiments on your commit log messages, their
attention to detail made this series that much easier to review.