[PATCH mptcp-net 0/2] mptcp: pm: in-kernel: fullmesh: re-add of the initial subflow endp

[Abdul Wasey <w453y.me@gmail.com>]

With fullmesh endpoints, removing and re-adding the endpoint used by the
initial subflow never creates a new subflow from it: the closed initial
subflow stays in the conn_list with the local ID 0, and marks the remote
ID as used.

Patch 1 fixes that, patch 2 adds a test for it.

Found with a router flapping one of its links: the link carrying the
initial subflow never rejoined the existing connections. Tested on top
of the export branch (they also apply on export-net): the new test fails
without patch 1, and the whole mptcp_join.sh passes with it.

Abdul Wasey (2):
  mptcp: pm: in-kernel: fullmesh: skip closed subflows
  selftests: mptcp: join: re-add the initial subflow endp with fullmesh

 net/mptcp/pm_kernel.c                         | 10 ++++++-
 .../testing/selftests/net/mptcp/mptcp_join.sh | 30 +++++++++++++++++++
 2 files changed, 39 insertions(+), 1 deletion(-)

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2.43.0