[LTP] How to convert TFAIL into TCONF for netns_*

[Jan Stancek]

----- Original Message -----
> Hello everyone,
> 
> While running containers' tests we got failures on all netns_xxx
> tests with different errors but the main one is:
> 
> unable to create veth pair devices

Checking the output of 'ip' could be one way:

# ip link add ve_A type veth peer name ve_B
RTNETLINK answers: Operation not supported

If there's "Operation not supported" -> TCONF, else TBROK.

> 
> It is because we currently do not have CONFIG_VETH enabled.
> There are also some tests failing because we again do not have the
> correct configuration such as CONFIG_TUN for netns_link tests:
> https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/containers/netns/netns_netlink.c#L142

Similar here, but check for ENODEV.

Other than that I can only think of grepping /proc/kallsyms,
which could break if symbols change name.

Regards,
Jan

> 
> We would like to convert all these TFAIL tests into TCONF but we
> are not sure how to implement that in a proper way. The readme of this
> test indicates the kernel's configurations needed but we would like
> to test the kernel that we currently have without any modification.
> 
> What do you think about that?
> What should we do to convert these TBROK into TCONF?
> 
> Thank you in advance,
> Best regards,
> 
> --
> Mylène Josserand, Bootlin (formerly Free Electrons)
> Embedded Linux and Kernel engineering
> https://bootlin.com
> 
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