[MPTCP] [PATCH v2 00/13] mptcp: support for queuing data at mptcp-level

[Paolo Abeni <pabeni at redhat.com>]

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This is necessary to cope correctly with large sendbuffer (larger then snd wnd)
while respecting the MPTCP level snd window.

A major rework of both xmit and shudown path is required to support this
feature (patches 8 and 9). To try to keep the related patches as small as
possible, a bunch of new helpers is created by patches 3-7.
Note that patch 5 can stand for it's own merit and possibly be upstreamed soon.

Finally patch 10 uses the MPTCP equivalent of tcp_push_pending_frames(), to
spool queued data ad MPTCP level, as soon as the windows allow that.

This iteration includes a few additional fixes (patches 1,2,13) which make the
self-tests much more stable, even if likely some bug is still there.

Note that patches 1 and 2 are bugfixes for the current upstream tree will
target -net/-net-next soon.

Patch 13 is possibly a bit too aggressive, perhaps it could be left staging
in export branch for a while.  

Not strictily related to this series: we currently send DATA_FIN ack only once
- the behaviour is not change here. If that is dropped, we will never
retransmit, and the peer will be stuck.

Florian Westphal (2):
  mptcp: rework poll+nospace handling
  mptcp: keep track of advertised windows right edge

Paolo Abeni (11):
  mptcp: more DATA FIN fixes
  mptcp: don't skip needed ack
  tcp: factor out __tcp_close() helper
  mptcp: introduce mptcp_schedule_work
  mptcp: reduce the arguments of mptcp_sendmsg_frag
  mptcp: add accounting for pending data
  mptcp: introduce MPTCP snd_nxt
  mptcp: refactor shutdown and close
  mptcp: move page frag allocation in mptcp_sendmsg()
  mptcp: try to push pending data on snd una updates
  mptcp: send explicit ack on delayed ack_seq incr

 include/net/tcp.h    |   1 +
 net/ipv4/tcp.c       |   9 +-
 net/mptcp/options.c  |  34 +-
 net/mptcp/pm.c       |   4 +-
 net/mptcp/protocol.c | 908 +++++++++++++++++++++++++------------------
 net/mptcp/protocol.h |  69 +++-
 net/mptcp/subflow.c  |  34 +-
 7 files changed, 644 insertions(+), 415 deletions(-)

-- 
2.26.2