Re: [PATCH net-next 00/10 v2] selftests: pmtu: Add further vti/vti6 MTU and PMTU tests

On Sun, 18 Mar 2018 11:31:10 -0600
David Ahern [off-list ref] wrote:

On 3/16/18 7:31 PM, Stefano Brivio wrote:

quoted

Patches 5/10 to 10/10 add tests to verify default MTU assignment
for vti4 and vti6 interfaces, to check that MTU values set on new
link and link changes are properly taken and validated, and to
verify PMTU exceptions on vti4 interfaces.

Patch 1/10 reverses function return codes as suggested by David
Ahern.

Patch 2/10 fixes the helper to fetch exceptions MTU to run in the
passed namespace.

Patches 3/10 and 4/10 are preparation work to make it easier to
introduce those tests.

v2: Reverse return codes, and make output prettier in 4/9 by
    using padded printf, test descriptions and buffered error
    strings. Remove accidental output to /dev/kmsg from 10/10
    (was 9/9).  

pulling pmtu.sh from net-next I see log messages on console:

[  890.741117] ip netns exec ns-kFUQx6 ip link set vti6_a type vti6
remote fc00:1001::0 local fc00:1001::0
[  890.837569] ip netns exec ns-kFUQx6 ip link set vti6_a mtu 1280 type
vti6 remote fc00:1000::0 local fc00:1000::0

Thanks for checking. I accidentally left two more prints to kernel log
in 10/10, I'll send another patch to remove them.

-- 
Stefano