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When working on the rp_filter problem, I didn't realise that disabling
it on the network devices didn't cover all cases: rp_filter could also
be enabled globally in the namespace, in which case it would drop
packets, even if the net device has rp_filter=0.
Fixes: 1ccd58331f6f ("selftests: disable rp_filter when testing bareudp")
Fixes: bbbc7aa45eef ("selftests: add test script for bareudp tunnels")
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Link: https://lore.kernel.org/r/f2d459346471f163b239aa9d63ce3e2ba9c62895.1605107012.git.gnault@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Some systems have rp_filter=1 as default configuration. This breaks
bareudp.sh as the intermediate namespaces handle part of the routing
with regular IPv4 routes but the reverse path is done with tc
(flower/tunnel_key/mirred).
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Link: https://lore.kernel.org/r/28140b7d20161e4f766b558018fe2718f9bc1117.1604767577.git.gnault@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Test different encapsulation modes of the bareudp module:
* Unicast MPLS,
* IPv4 only,
* IPv4 in multiproto mode (that is, IPv4 and IPv6),
* IPv6.
Each mode is tested with both an IPv4 and an IPv6 underlay.
v2:
* Add build dependencies in config file (Willem de Bruijn).
* The MPLS test now uses its own IP addresses. This minimises
the amount of cleanup between tests and simplifies the script.
* Verify that iproute2 supports bareudp tunnels before running the
script (and other minor usability improvements).
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Link: https://lore.kernel.org/r/8abc0e58f8a7eeb404f82466505a73110bc43ab8.1604088587.git.gnault@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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