v2:
 - split into more small patches.
 - change all parameters of mptcp_sched_ops from sk to msk:
       void (*init)(struct mptcp_sock *msk);
       void (*release)(struct mptcp_sock *msk);
       struct sock *   (*get_subflow)(struct mptcp_sock *msk);
 - add tests in bpf_tcp_ca.c, instead of adding a new one.

Depends on the bpf patches queued in the patchwork:

c42b1c51caa4 selftests: bpf: add bpf_first test
49747d1d690e selftests: bpf: add bpf_first scheduler
857cc219d855 mptcp: add bpf_mptcp_sched_ops
287b994479ea mptcp: add mptcp_get_subflow wrapper
a626e160359a mptcp: add sched for struct mptcp_sock
7613acc6e70e mptcp: add a new sysctl scheduler
70ff4322bee0 mptcp: register default scheduler
50a302c839de mptcp: add struct mptcp_sched_ops
2b41b6b9a948 selftests: bpf: verify first subflow of mptcp_sock
91e52c32a832 selftests: bpf: verify ca_name of struct mptcp_sock
07a66e354126 Squash to "selftests: bpf: test bpf_skc_to_mptcp_sock"
168ee1d1a118 selftests: bpf: test bpf_skc_to_mptcp_sock
7a773e6af914 Squash to "selftests: bpf: add MPTCP test base"
a1933407b912 bpf: add bpf_skc_to_mptcp_sock_proto
0095d8ca9a67 Revert "bpf: add 'bpf_mptcp_sock' structure and helper"
2856d8c8020a Revert "selftests: bpf: add bpf_mptcp_sock() verifier tests"
df0e2a4c394f (origin/export, origin/HEAD) DO-NOT-MERGE: mptcp: enabled by default

v1:

Addressed to the commends in the RFC version:
https://patchwork.kernel.org/project/mptcp/cover/cover.1631011068.git.geliangtang@xiaomi.com/

Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/75

Geliang Tang (8):
  mptcp: add struct mptcp_sched_ops
  mptcp: register default scheduler
  mptcp: add a new sysctl scheduler
  mptcp: add sched for struct mptcp_sock
  mptcp: add mptcp_get_subflow wrapper
  mptcp: add bpf_mptcp_sched_ops
  selftests: bpf: add bpf_first scheduler
  selftests: bpf: add bpf_first test

 Documentation/networking/mptcp-sysctl.rst     |   8 ++
 include/net/mptcp.h                           |  13 +++
 kernel/bpf/bpf_struct_ops_types.h             |   4 +
 net/mptcp/Makefile                            |   2 +-
 net/mptcp/bpf.c                               | 102 ++++++++++++++++++
 net/mptcp/ctrl.c                              |  14 +++
 net/mptcp/protocol.c                          |  12 ++-
 net/mptcp/protocol.h                          |   9 ++
 net/mptcp/sched.c                             |  89 +++++++++++++++
 tools/testing/selftests/bpf/bpf_tcp_helpers.h |  12 +++
 .../selftests/bpf/prog_tests/bpf_tcp_ca.c     |  42 +++++++-
 tools/testing/selftests/bpf/progs/bpf_first.c |  24 +++++
 12 files changed, 322 insertions(+), 9 deletions(-)
 create mode 100644 net/mptcp/sched.c
 create mode 100644 tools/testing/selftests/bpf/progs/bpf_first.c

-- 
2.34.1