tree 9036b363f2b5e255ab40770773312531a0637a00
parent 86e39e04482b0aadf3ee3ed5fcf2d63816559d36
author Paolo Abeni <pabeni@redhat.com> 1641514823 -0800
committer David S. Miller <davem@davemloft.net> 1641554827 +0000

mptcp: do not block subflows creation on errors

If the MPTCP configuration allows for multiple subflows
creation, and the first additional subflows never reach
the fully established status - e.g. due to packets drop or
reset - the in kernel path manager do not move to the
next subflow.

This patch introduces a new PM helper to cope with MPJ
subflow creation failure and delay and hook it where appropriate.

Such helper triggers additional subflow creation, as needed
and updates the PM subflow counter, if the current one is
closing.

Additionally start all the needed additional subflows
as soon as the MPTCP socket is fully established, so we don't
have to cope with slow MPJ handshake blocking the next subflow
creation.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>