netdev - [PATCH bpf-next v2 0/2] Atomic flow dissector updates

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Date:   Thu, 10 Oct 2019 20:17:48 +0200
From:   Jakub Sitnicki <jakub@...udflare.com>
To:     bpf@...r.kernel.org
Cc:     netdev@...r.kernel.org, kernel-team@...udflare.com,
        Stanislav Fomichev <sdf@...ichev.me>
Subject: [PATCH bpf-next v2 0/2] Atomic flow dissector updates

This patch set changes how bpf(BPF_PROG_ATTACH) operates on flow dissector
hook when there is already a program attached. After this change the user
is allowed to update the program in a single syscall. Please see the first
patch for rationale.

v1 -> v2:

- Don't use CHECK macro which expects BPF program run duration, which we
  don't track in attach/detach tests. Suggested by Stanislav Fomichev.

- Test re-attaching flow dissector in both root and non-root network
  namespace. Suggested by Stanislav Fomichev.


Jakub Sitnicki (2):
  flow_dissector: Allow updating the flow dissector program atomically
  selftests/bpf: Check that flow dissector can be re-attached

 net/core/flow_dissector.c                     |  10 +-
 .../bpf/prog_tests/flow_dissector_reattach.c  | 127 ++++++++++++++++++
 2 files changed, 134 insertions(+), 3 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/prog_tests/flow_dissector_reattach.c

-- 
2.20.1