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Joachim Wiberg
ddc57ed6ae
When a veth pair has one end in a container and the other in the host
namespace, removing it failed: the container end's teardown deleted the
whole pair, so the host end's own delete then failed ("Cannot find
device") and aborted the teardown, leaving the interface behind.
The host-namespace delete added for the both-ends-in-container case was
emitted for every container veth end. Restrict it to the primary end,
which for a host/container pair is the host end that already deletes the
pair itself.
Extend the container veth tests to remove the pair and verify it is gone,
covering both the single-end (regression) and both-ends teardown paths.
Fixes: #1546
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>