netlink: Ignore routes to link-local addresses for selecting interface

Since f919dc7a4b1c ("conf, netlink: Don't require a default route to
start"), and since 639fdf06ede ("netlink: Fix selection of template
interface") less buggily, we haven't required a default route on the host
in order to operate.  Instead, if we lack a default route we'll pick an
interface with any route, as long as there's only one such interface.  If
there's more than one, we don't have a good criterion to pick, so we give
up with an informational message.

Paul Holzinger pointed out that this code considers it ambiguous even if
all but one of the interfaces has only routes to link-local addresses
(fe80::/10).  A route to link-local addresses isn't really useful from
pasta's point of view, so ignore them instead.  This removes a misleading
message in many cases, and a spurious failure in some cases.

Suggested-by: Paul Holzinger <pholzing@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

0 files changed, 0 insertions, 0 deletions