This patch set adds BPF iterator support for UNIX domain socket.  The first
patch implements it and the second adds a selftest.


Changelog:
  v3:
  - Export some functions for CONFIG_UNIX=m

  v2:
  https://lore.kernel.org/netdev/20210803011110.21205-1-kuniyu@amazon.co.jp/ (local)
  - Implement bpf_iter specific seq_ops->stop()
  - Add bpf_iter__unix in bpf_iter.h
  - Move common definitions in selftest to bpf_tracing_net.h
  - Include the code for abstract UNIX domain socket as comment in selftest
  - Use ASSERT_OK_PTR() instead of CHECK()
  - Make ternary operators on single line

  v1:
  https://lore.kernel.org/netdev/20210729233645.4869-1-kuniyu@amazon.co.jp/ (local)


Kuniyuki Iwashima (2):
  bpf: af_unix: Implement BPF iterator for UNIX domain socket.
  selftest/bpf: Implement sample UNIX domain socket iterator program.

 fs/proc/proc_net.c                            |  2 +
 include/linux/btf_ids.h                       |  3 +-
 kernel/bpf/bpf_iter.c                         |  3 +
 net/core/filter.c                             |  1 +
 net/unix/af_unix.c                            | 93 +++++++++++++++++++
 .../selftests/bpf/prog_tests/bpf_iter.c       | 16 ++++
 tools/testing/selftests/bpf/progs/bpf_iter.h  |  8 ++
 .../selftests/bpf/progs/bpf_iter_unix.c       | 86 +++++++++++++++++
 .../selftests/bpf/progs/bpf_tracing_net.h     |  4 +
 9 files changed, 215 insertions(+), 1 deletion(-)
 create mode 100644 tools/testing/selftests/bpf/progs/bpf_iter_unix.c

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2.30.2