netdev - Re: [PATCHv5 bpf-next 4/5] selftests: bpf: add test for sk

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Date:   Wed, 1 Apr 2020 16:19:41 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Joe Stringer <joe@...d.net.nz>
Cc:     bpf <bpf@...r.kernel.org>, Lorenz Bauer <lmb@...udflare.com>,
        Networking <netdev@...r.kernel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Eric Dumazet <eric.dumazet@...il.com>,
        Martin Lau <kafai@...com>
Subject: Re: [PATCHv5 bpf-next 4/5] selftests: bpf: add test for sk_assign

On Sun, Mar 29, 2020 at 3:58 PM Joe Stringer <joe@...d.net.nz> wrote:
>
> From: Lorenz Bauer <lmb@...udflare.com>
>
> Attach a tc direct-action classifier to lo in a fresh network
> namespace, and rewrite all connection attempts to localhost:4321
> to localhost:1234 (for port tests) and connections to unreachable
> IPv4/IPv6 IPs to the local socket (for address tests). Includes
> implementations for both TCP and UDP.
>
> Keep in mind that both client to server and server to client traffic
> passes the classifier.
>
> Signed-off-by: Lorenz Bauer <lmb@...udflare.com>
> Co-authored-by: Joe Stringer <joe@...d.net.nz>
> Signed-off-by: Joe Stringer <joe@...d.net.nz>
> Acked-by: Martin KaFai Lau <kafai@...com>
> ---
> v5: No change
> v4: Add acks
> v3: Add tests for UDP socket assign
>     Fix switching back to original netns after test
>     Avoid using signals to timeout connections
>     Refactor to iterate through test cases
> v2: Rebase onto test_progs infrastructure
> v1: Initial commit
> ---

Hey Joe!

When syncing libbpf to Github, this selftest is now failing with the
follow errors:

tc: command line is not complete, try "help"
configure_stack:FAIL:46
configure_stack: Interrupted system call
#49 sk_assign:FAIL

We are probably missing some packages or something like that. Could
you please help figuring out how we need to adjust libbpf Travis CI
environment to accomodate this? Thanks!
You can find one of the failed runs at [0]

  [0] https://travis-ci.com/github/anakryiko/libbpf/jobs/311759005