netdev - Re: [PATCH bpf] selftests: bpf: fix test_tc

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Date:   Fri, 15 Nov 2019 17:05:42 -0500
From:   Willem de Bruijn <willemdebruijn.kernel@...il.com>
To:     Daniel Borkmann <daniel@...earbox.net>
Cc:     Jiri Benc <jbenc@...hat.com>, bpf <bpf@...r.kernel.org>,
        Network Development <netdev@...r.kernel.org>,
        Willem de Bruijn <willemb@...gle.com>
Subject: Re: [PATCH bpf] selftests: bpf: fix test_tc_tunnel hanging

On Fri, Nov 15, 2019 at 5:02 PM Daniel Borkmann <daniel@...earbox.net> wrote:
>
> On 11/15/19 1:43 PM, Jiri Benc wrote:
> > When run_kselftests.sh is run, it hangs after test_tc_tunnel.sh. The reason
> > is test_tc_tunnel.sh ensures the server ('nc -l') is run all the time,
> > starting it again every time it is expected to terminate. The exception is
> > the final client_connect: the server is not started anymore, which ensures
> > no process is kept running after the test is finished.
> >
> > For a sit test, though, the script is terminated prematurely without the
> > final client_connect and the 'nc' process keeps running. This in turn causes
> > the run_one function in kselftest/runner.sh to hang forever, waiting for the
> > runaway process to finish.
> >
> > Ensure a remaining server is terminated on cleanup.
> >
> > Fixes: f6ad6accaa9d ("selftests/bpf: expand test_tc_tunnel with SIT encap")
> > Cc: Willem de Bruijn <willemb@...gle.com>
> > Signed-off-by: Jiri Benc <jbenc@...hat.com>
>
> Looks like your Fixes tag is wrong:
>
> [...]
> Applying: selftests: bpf: Fix test_tc_tunnel hanging
> Switched to branch 'master'
> Your branch is up to date with 'origin/master'.
> Updating 808c9f7ebfff..e2090d0451c5
> Fast-forward
>   tools/testing/selftests/bpf/test_tc_tunnel.sh | 5 +++++
>   1 file changed, 5 insertions(+)
> Deleted branch mbox (was e2090d0451c5).
> Commit: e2090d0451c5 ("selftests: bpf: Fix test_tc_tunnel hanging")
>         Fixes tag: Fixes: f6ad6accaa9d ("selftests/bpf: expand test_tc_tunnel with SIT encap")
>         Has these problem(s):
>                 - Target SHA1 does not exist
> [...]

Ah, a typo. This is the SHA1 in my tree, note the aa9d --> aa99d

$ git fetch davem-net-next
$ git log -1 --oneline -- tools/testing/selftests/bpf/test_tc_tunnel.sh
f6ad6accaa99d selftests/bpf: expand test_tc_tunnel with SIT encap