[PATCH mptcp-next v11 0/7] add skc_to_mptcp_sock

[Geliang Tang <geliang.tang@suse.com>]

v11:
 - merge "check more values from mptcp_sock" series into this series.
 - patch 2:
   - rebased.
 - patch 3:
   - rebased.
   - add 'Copyright' entry as Matt suggested in v9:
   https://patchwork.kernel.org/project/mptcp/patch/d6d33be9899118c5f542a6ce43f868d4e9e2766b.1646745228.git.geliang.tang@suse.com/
 - patch 4:
   - add test__start_subtest.
   - add some 'Copyright' entries.
 - patch 5:
   - change monitor_log_path to static
   - drop bpf_trace_printk()
 - patch 6:
   - use TCP_CA_NAME_MAX instead of strlen(val.ca_name) in strncmp().
   - use 'sysctl -b net.ipv4.tcp_congestion_control' to get ca_name.

v10:
 - merge the squash-to patch.
 - update patch 3 as Matt suggested.
 - add sync() in get_msk_token() before read().
 - add a comment for get_msk_token().
 - update subjects and commit logs.

v9:
 - update progs/mptcp.c in patch 4 and 5

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 (7):
  Revert "selftests: bpf: add bpf_mptcp_sock() verifier tests"
  Revert "bpf: add 'bpf_mptcp_sock' structure and helper"
  bpf: add bpf_skc_to_mptcp_sock_proto
  Squash to "selftests: bpf: add MPTCP test base"
  selftests: bpf: test bpf_skc_to_mptcp_sock
  selftests: bpf: verify ca_name of struct mptcp_sock
  selftests: bpf: verify first subflow of mptcp_sock

 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                             |  22 ++-
 net/mptcp/bpf.c                               |  64 +------
 scripts/bpf_doc.py                            |   4 +-
 tools/include/uapi/linux/bpf.h                |  14 +-
 tools/testing/selftests/bpf/bpf_tcp_helpers.h |  12 ++
 .../testing/selftests/bpf/prog_tests/mptcp.c  | 159 ++++++++++++++++--
 tools/testing/selftests/bpf/progs/mptcp.c     |  44 ++++-
 tools/testing/selftests/bpf/verifier/sock.c   |  63 -------
 12 files changed, 229 insertions(+), 221 deletions(-)

-- 
2.34.1