Re: [PATCH bpf-next v5 15/15] selftests/bpf: Tests for BPF_SK_LOOKUP attach point

On Wed, Jul 29, 2020 at 10:57 AM CEST, Jakub Sitnicki wrote:

On Tue, Jul 28, 2020 at 10:13 PM CEST, Andrii Nakryiko wrote:

[...]

quoted

We are getting this failure in Travis CI when syncing libbpf [0]:

ip: either "local" is duplicate, or "nodad" is garbage

switch_netns:PASS:unshare 0 nsec

switch_netns:FAIL:system failed

(/home/travis/build/libbpf/libbpf/travis-ci/vmtest/bpf-next/tools/testing/selftests/bpf/prog_tests/sk_lookup.c:1310:
errno: No such file or directory) system(ip -6 addr add dev lo
fd00::1/128 nodad)

#73 sk_lookup:FAIL

Can you please help fix it so that it works in a Travis CI environment
as well? For now I disabled sk_lookup selftests altogether. You can
try to repro it locally by forking https://github.com/libbpf/libbpf
and enabling Travis CI for your account. See [1] for the PR that
disabled sk_lookup.

[...]

Once this fix-up finds its way to bpf-next, we will be able to re-enable
sk_loookup tests:

  https://lore.kernel.org/bpf/20200730125325.1869363-1-jakub@cloudflare.com/ (local)

And I now know that I need to test shell commands against BusyBox 'ip'
command implementation, that libbpf project uses in CI env.