[PATCH mptcp-next v5 0/5] Squash to "Add mptcp_subflow bpf_iter support"

[Geliang Tang <geliang@kernel.org>]

From: Geliang Tang <tanggeliang@kylinos.cn>

v5:
 - update subjects and commit logs as Matt suggested (thanks).
 - avoid repeating checks in patch 1.
 - do stricter checks on subflows in patch 3.

v4:
 - CI reports the following BUILD_BUG_ON fails on i386:

 BUILD_BUG_ON(sizeof(struct bpf_iter_mptcp_subflow_kern) !=
 	      sizeof(struct bpf_iter_mptcp_subflow))

 Just like in bpf_iter_task_new(), change this "!=" to ">".

v3:
 - check sock_owned_by_user_nocheck(sk)/spin_is_locked(&sk->sk_lock.slock),
   instead of lockdep_sock_is_held(sk).
 - add "sizeof" and "alignof" checks.
 - drop bpf_mptcp_sk() and bpf_mptcp_subflow_tcp_sock() definitions. Use
   bpf_skc_to_mptcp_sock() and mptcp_subflow_tcp_sock() in mptcp_subflow
   bpf_iter selftests instead.

v2:
 - add CONFIG_LOCKDEP check in patch 2 to fix the build error reported
   by CI.

Address Martin's comments in v1.

Geliang Tang (5):
  bpf: Extend bpf_skc_to_mptcp_sock to MPTCP sock
  bpf: Allow use of skc_to_mptcp_sock in cg_sockopt
  Squash to "bpf: Register mptcp common kfunc set"
  Squash to "bpf: Add mptcp_subflow bpf_iter"
  Squash to "selftests/bpf: Add mptcp_subflow bpf_iter subtest"

 include/net/mptcp.h                           |  4 +-
 kernel/bpf/cgroup.c                           |  2 +
 net/core/filter.c                             |  2 +-
 net/mptcp/bpf.c                               | 41 +++++++++++--------
 tools/testing/selftests/bpf/progs/mptcp_bpf.h |  1 -
 .../selftests/bpf/progs/mptcp_bpf_iters.c     | 11 +++--
 6 files changed, 33 insertions(+), 28 deletions(-)

-- 
2.45.2