v8:
 - update as Matt suggested.

v7:
 - parse msk token from the output of 'ip mptcp monitor'.
 - add Nicolas and Matt's SoB tags.

v6:
 - add skc_to_mptcp_sock helper and test

RESEND:
 - fix the CI Build Failure.
v5:
 - fix incorrect token value
 - verify the token in selftest

v4:
 - define bpf_mptcp_sock_proto as a static function, no longer export
   it in linux/bpf.h

v3:
 - use RET_PTR_TO_BTF_ID_OR_NULL instead of RET_PTR_TO_MPTCP_SOCK_OR_NULL
 - add a new bpf_id BTF_SOCK_TYPE_MPTCP

v2:
 - keep RET_PTR_TO_MPTCP_SOCK_OR_NULL. If we use RET_PTR_TO_BTF_ID_OR_NULL
instead of RET_PTR_TO_MPTCP_SOCK_OR_NULL as Alexei suggested, the
"userspace" tests developed by Nicolas will break.

Geliang Tang (5):
  Revert "selftests: bpf: add bpf_mptcp_sock() verifier tests"
  Revert "bpf: add 'bpf_mptcp_sock' structure and helper"
  bpf: add skc_to_mptcp_sock helper
  Squash to "selftests: bpf: add MPTCP test base"
  selftests: bpf: add skc_to_mptcp_sock test

 include/linux/bpf.h                           |  31 +----
 include/linux/btf_ids.h                       |   3 +-
 include/uapi/linux/bpf.h                      |  14 +--
 kernel/bpf/verifier.c                         |  20 ----
 net/core/filter.c                             |  21 +++-
 net/mptcp/bpf.c                               |  62 +---------
 scripts/bpf_doc.py                            |   4 +-
 tools/include/uapi/linux/bpf.h                |  14 +--
 tools/testing/selftests/bpf/bpf_tcp_helpers.h |   6 +
 .../testing/selftests/bpf/prog_tests/mptcp.c  | 108 +++++++++++++++---
 tools/testing/selftests/bpf/progs/mptcp.c     |  22 ++++
 tools/testing/selftests/bpf/verifier/sock.c   |  63 ----------
 12 files changed, 157 insertions(+), 211 deletions(-)

-- 
2.34.1