[ovs-build] Errored: openvswitch/ovs#7155 (master - 22e506d)
Travis CI
builds at travis-ci.org
Thu Oct 11 19:03:09 UTC 2018
Build Update for openvswitch/ovs
-------------------------------------
Build: #7155
Status: Errored
Duration: 52 mins and 16 secs
Commit: 22e506d (master)
Author: Numan Siddique
Message: ovn: Fix IPv6 DAD failure for container ports
When a container port is created inside a VM, the below kernel message
is seen and IPv6 doesn't work on that interface.
[ 138.000753] IPv6: vlan4: IPv6 duplicate address <IPv6 LLA> detected!
When a container port sends a ethernet broadcast packet, OVN delivers the same
packet back to the child port (and hence the DAD check fails).
This is because
- 'MLF_ALLOW_LOOPBACK_BIT' is set in REG10 in table 0 for the packets received
from any child port.
- for ethernet broadcast packets, Table 33 (OFTABLE_LOCAL_OUTPUT) clones the
packet for every local port 'P' which belongs to the same datapath i.e
'P'->REG15, resubmit(,34)
- If REG14 and REG15 are same, Table 34 (OFTABLE_CHECK_LOOPBACK) drops the packet
if 'MLF_ALLOW_LOOPBACK_BIT' is not set.
- But in the case of container ports, this bit will be set and hence doesn't gets
dropped and eventually gets delivered to the source container port.
- The VM's kernel thinks its a DAD packet. The latest kernels (4.19) implements
the RFC -7527 (enhanced DAD), but it is still a problem for older kernels.
This patch fixes the issue by using a new register bit (MLF_NESTED_CONTAINER_BIT)
instead of 'MLF_ALLOW_LOOPBACK_BIT' and sets it in REG10 for the packets received
from child ports so that Table 34 drops the packet for the source port.
Signed-off-by: Numan Siddique <nusiddiq at redhat.com>
Signed-off-by: Gurucharan Shetty <guru at ovn.org>
View the changeset: https://github.com/openvswitch/ovs/compare/3d737c13872c...22e506d3b686
View the full build log and details: https://travis-ci.org/openvswitch/ovs/builds/440272536?utm_medium=notification&utm_source=email
--
You can unsubscribe from build emails from the openvswitch/ovs repository going to https://travis-ci.org/account/preferences/unsubscribe?repository=2143550&utm_medium=notification&utm_source=email.
Or unsubscribe from *all* email updating your settings at https://travis-ci.org/account/preferences/unsubscribe?utm_medium=notification&utm_source=email.
Or configure specific recipients for build notifications in your .travis.yml file. See https://docs.travis-ci.com/user/notifications.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.openvswitch.org/pipermail/ovs-build/attachments/20181011/272bd523/attachment.html>
More information about the build
mailing list