netdev - [PATCH bpf-next 0/7] selftests/bpf: Remove unnecessary mount/umount dance

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Date:   Mon, 28 Nov 2022 23:08:53 -0800
From:   Martin KaFai Lau <martin.lau@...ux.dev>
To:     bpf@...r.kernel.org
Cc:     'Alexei Starovoitov ' <ast@...nel.org>,
        'Andrii Nakryiko ' <andrii@...nel.org>,
        'Daniel Borkmann ' <daniel@...earbox.net>,
        netdev@...r.kernel.org, kernel-team@...a.com
Subject: [PATCH bpf-next 0/7] selftests/bpf: Remove unnecessary mount/umount dance

From: Martin KaFai Lau <martin.lau@...nel.org>

Some of the tests do mount/umount dance when switching netns.
It is error-prone like https://lore.kernel.org/bpf/20221123200829.2226254-1-sdf@google.com/

Another issue is, there are many left over after running some of the tests:
#> mount | egrep sysfs | wc -l
19

Instead of further debugging this dance,  this set is to avoid the needs to
do this remounting altogether.  It will then allow those tests to be run
in parallel again.

Martin KaFai Lau (7):
  selftests/bpf: Use if_nametoindex instead of reading the
    /sys/net/class/*/ifindex
  selftests/bpf: Avoid pinning bpf prog in the tc_redirect_dtime test
  selftests/bpf: Avoid pinning bpf prog in the tc_redirect_peer_l3 test
  selftests/bpf: Avoid pinning bpf prog in the netns_load_bpf() callers
  selftests/bpf: Remove the "/sys" mount and umount dance in
    {open,close}_netns
  selftests/bpf: Remove serial from tests using {open,close}_netns
  selftests/bpf: Avoid pinning prog when attaching to tc ingress in
    btf_skc_cls_ingress

 tools/testing/selftests/bpf/network_helpers.c |  51 +--
 .../bpf/prog_tests/btf_skc_cls_ingress.c      |  25 +-
 .../selftests/bpf/prog_tests/empty_skb.c      |   2 +-
 .../selftests/bpf/prog_tests/tc_redirect.c    | 314 +++++++++---------
 .../selftests/bpf/prog_tests/test_tunnel.c    |   2 +-
 .../bpf/prog_tests/xdp_do_redirect.c          |   2 +-
 .../selftests/bpf/prog_tests/xdp_synproxy.c   |   2 +-
 7 files changed, 178 insertions(+), 220 deletions(-)

-- 
2.30.2