[PATCH mptcp-next 0/9] mptcp: refactor first subflow init

[Paolo Abeni <pabeni@redhat.com>]

This is the needed refactor for the selinux fixes, as discussed on
the ML.

The main change, introduced by patch 6/9 consist in moving the first
subflow initialization from the msk init callback into the mptcp
syscall needing such data (namely: bind, listen, connect). 

Patch 4 and 5 allow making such change smaller.

Patches 7, 8, 9 are not strictly needed, but are some nice to have
follow-up, cleaning-up the related code.

Specifically patch 8 closes issues/290, but requires some additional
pre-req (patches 1-3), which in turn are also nice to have IMHO.

Sharing after little testing to get feedback and let the bot massage
the new code: patch 1 and 7 can have subtle effect, I would like to
have syzkaller digest them for a while.

I'll rebase the selinux patches on top and share them soon.

Paolo Abeni (9):
  mptcp: refactor passive socket initialization.
  mptcp: drop unneeded argument
  mptcp: drop legacy code.
  mptcp: avoid unneeded __mptcp_nmpc_socket() usage
  mptcp: move fastopen subflow check inside mptcp_sendmsg_fastopen()
  mptcp: move first subflow allocation at mpc access time
  mptcp: do not keep around the first subflow after disconnect.
  mptcp: fastclose msk when cleaning unaccepted sockets
  mptcp: refactor mptcp_stream_accept()

 net/mptcp/options.c    |   9 +--
 net/mptcp/pm.c         |   4 +-
 net/mptcp/pm_netlink.c |   4 +-
 net/mptcp/protocol.c   | 159 ++++++++++++++++++++++-------------------
 net/mptcp/protocol.h   |   4 +-
 net/mptcp/sockopt.c    |  18 ++---
 net/mptcp/subflow.c    |  40 +++++++----
 7 files changed, 132 insertions(+), 106 deletions(-)

-- 
2.38.1