[PATCH mptcp-next v4 0/5] implement psock_update_sk_prot

[Geliang Tang <geliang@kernel.org>]

From: Geliang Tang <tanggeliang@kylinos.cn>

v4:
 - Address Mat's comments: implement .read_skb to make the selftests run.
 - Move mptcp_bpf_update_proto() from protocol.c to bpf.c.
 - Include the "implement .splice_eof" patches in this series, as they
   both modify mptcp_prot, mptcp_stream_ops and mptcp_v6_stream_ops.

v3:
 - Address the comments by ai review.
   - use WRITE_ONCE to set sk->sk_write_space.
   - update the selftest, set a new key for client socket.
 - Fix line length warnings.
 - https://patchwork.kernel.org/project/mptcp/cover/cover.1773826662.git.tanggeliang@kylinos.cn/

RESEND:
 - rebased.
 - to trigger ai review.

v2:
 - Include mptcp_bpf_update_proto within CONFIG_BPF_SYSCALL to fix the
compilation errors reported by the kernel test robot.
 - Add checks for IS_ENABLED(CONFIG_MPTCP_IPV6).

Implement psock_update_sk_prot, for basic MPTCP BPF SOCKMAP support.

Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/521

Geliang Tang (5):
  mptcp: implement .splice_eof
  selftests: mptcp: connect: trigger splice_eof
  mptcp: implement read_skb for sockmap stream verdict
  mptcp: implement psock_update_sk_prot
  selftests/bpf: Update sockmap tests for MPTCP

 net/mptcp/bpf.c                               | 106 ++++++++++++++++++
 net/mptcp/protocol.c                          |  73 +++++++++++-
 net/mptcp/protocol.h                          |   9 ++
 .../testing/selftests/bpf/prog_tests/mptcp.c  |  42 ++++---
 .../selftests/net/mptcp/mptcp_connect.c       |   5 +-
 5 files changed, 212 insertions(+), 23 deletions(-)

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2.53.0