[PATCH mptcp-next RFC 0/3] mptcp: reset fully_estab after fallback & reject MPJ earlier

Here is a small RFC series to present my idea: it seems better with some
code than describing it.

I suggest bailing out early when we can: reset the fully established
when a fallback is done, then reject the MPJ earlier, and finally stop
processing connections early with the in-kernel PM.

I didn't check if any of those should be backported, probably not.

Only very lightly tested.

@Chenguang / @Gang: feel free to take over this series if you want to
extend it, or if fixes are needed.

Signed-off-by: Matthieu Baerts (NGI0) <[email protected]>
---
Matthieu Baerts (NGI0) (3):
      mptcp: no longer fully_established after a fallback
      mptcp: reject MP_JOIN earlier
      mptcp: pm: kernel: skip operating on closing connections

 net/mptcp/mib.c                                 |  1 +
 net/mptcp/mib.h                                 |  1 +
 net/mptcp/pm_kernel.c                           | 16 +++++++++++-----
 net/mptcp/protocol.c                            |  1 +
 net/mptcp/subflow.c                             | 19 ++++++++++++++++---
 tools/testing/selftests/net/mptcp/mptcp_join.sh | 25 +++++++++++++++++--------
 6 files changed, 47 insertions(+), 16 deletions(-)
---
base-commit: d536472a82d18356d323227213acb5603bb9050c
change-id: 20260814-mptcp-reset-mpj-early-dcc7d4d92df9

Best regards,
--  
Matthieu Baerts (NGI0) <[email protected]>