tree b07bfc656dc6be35ca783f55db254a5d9fda65bf
parent 46e967d187ed1693b34379ac4e27fd4e1fb40a45
author Paolo Abeni <pabeni@redhat.com> 1641514825 -0800
committer David S. Miller <davem@davemloft.net> 1641554827 +0000

mptcp: cleanup MPJ subflow list handling

We can simplify the join list handling leveraging the
mptcp_release_cb(): if we can acquire the msk socket
lock at mptcp_finish_join time, move the new subflow
directly into the conn_list, otherwise place it on join_list and
let the release_cb process such list.

Since pending MPJ connection are now always processed
in a timely way, we can avoid flushing the join list
every time we have to process all the current subflows.

Additionally we can now use the mptcp data lock to protect
the join_list, removing the additional spin lock.

Finally, the MPJ handshake is now always finalized under the
msk socket lock, we can drop the additional synchronization
between mptcp_finish_join() and mptcp_close().

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>