netns_sysfs from containers test suite in LTP failed with KVM kernel

[Po-Hsu Lin]

<<<test_start>>>
tag=netns_sysfs stime=1559024934
cmdline="netns_sysfs.sh"
contacts=""
analysis=exit
<<<test_output>>>
incrementing stop
RTNETLINK answers: Operation not supported
netns_sysfs 1 TBROK: failed to add a new (host) dummy device
<<<execution_status>>>
initiation_status="ok"
duration=0 termination_type=exited termination_id=2 corefile=no
cutime=1 cstime=0
<<<test_end>>>

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-1035-kvm 4.15.0-1035.35
ProcVersionSignature: User Name 4.15.0-1035.35-kvm 4.15.18
Uname: Linux 4.15.0-1035-kvm x86_64
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
Date: Tue May 28 06:22:51 2019
SourcePackage: linux-kvm
UpgradeStatus: No upgrade log present (probably fresh install)

[Po-Hsu Lin (cypressyew)]

This is failing because it needs CONFIG_DUMMY to be enabled.

[Po-Hsu Lin (cypressyew)]

This should be fixed from the test case side.

[Po-Hsu Lin (cypressyew)]

Didn't see this with 4.15.0-1086.88-kvm on node crdvm1

[Po-Hsu Lin (cypressyew)]

We have config_dummy enabled for newer KVM kernels. And the test is capable of detecting missing config now. https://github.com/linux-test-project/ltp/commit/5059889abdb61a53d2598cd0e52147af22e3d2c3