tg import create t/mptcp-do-not-block-subflows-creation-on-errors

.topmsg

@@ -1,4 +1,23 @@
-From: Matthieu Baerts <matthieu.baerts@tessares.net>
-Subject: [PATCH] t/mptcp-do-not-block-subflows-creation-on-errors
+From: Paolo Abeni <pabeni@redhat.com>
+Subject: [PATCH] mptcp: do not block subflows creation on errors
 
-Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
+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.
+
+Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
+Signed-off-by: Paolo Abeni <pabeni@redhat.com>