ipv4: fix validate_source for VRF setup

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David reported breakages of VRF scenarios due to the
commit 6e617de84e ("net: avoid a full fib lookup when rp_filter is
disabled."): the local addresses based test is too strict when VRFs
are in place.

With this change we fall-back to a full lookup when custom fib rules
are in place; so that we address the VRF use case and possibly other
similar issues in non trivial setups.

v1 -> v2:
 - fix build breakage when CONFIG_IP_MULTIPLE_TABLES is not defined,
   reported by the kbuild test robot

Reported-by: David Ahern <dsahern@gmail.com>
Fixes: 6e617de84e ("net: avoid a full fib lookup when rp_filter is disabled.")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Paolo Abeni 2017-10-31 14:32:38 +01:00 • committed by David S. Miller

parent dc82673f0c

commit 032a480202

1 changed files with 15 additions and 3 deletions

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18

net/ipv4/fib_frontend.c

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