[MPTCP] [RFC v3 00/15] TCP Extra-option framework for TCP-MD5 and SMC

[Christoph Paasch <cpaasch at apple.com>]

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3rd version of the set.

Now, fully tested and bugs fixed.

There are a two rather big changes (most of it is commented on in the notes):

* Made the tcp_option_list and RCU-protected hlist. We need RCU-protection
  because listener sockets are lockless nowadays.
* Previously, in tcp_v4_send_reset, we would lookup the MD5-signature and
  if there was one, go look for the listening-socket (if sk == NULL) to see
  if there is an MD5-key.
  Nowadays, we can't do this anymore because extra-options are only parsed when
  we actually have a socket. However, this shouldn't have an impact as far as
  I can see. Because, if there is a listening-socket, __inet_lookup_skb will
  match on it and when we then send a RST when coming from tcp_rcv_state_process
  we have the pointer to the listening socket.
  The only scenario wherer tcp_v4_send_reset() gets called with a NULL sk is
  when coming straight from tcp_v4_rcv.


If there are no major comments, I would like to go to netdev as a next step.

Christoph Paasch (14):
  tcp md5sig: Use skb's saddr when replying to an incoming segment
  tcp: Write options after the header has been fully done
  tcp: Pass sock and skb to tcp_options_write
  tcp: Allow tcp_fast_parse_options to drop segments
  tcp: Make smc_parse_options return 1 on success
  tcp_smc: Make SMC use TCP extra-option framework
  tcp_md5: Don't pass along md5-key
  tcp_md5: Detect key inside tcp_v4_send_ack instead of passing it as an
    argument
  tcp_md5: Detect key inside tcp_v6_send_response instead of passing it
    as an argument
  tcp_md5: Check for TCP_MD5 after TCP Timestamps in
    tcp_established_options
  tcp_md5: Move TCP-MD5 code out of TCP itself
  tcp_md5: Use tcp_extra_options in output path
  tcp_md5: Cleanup TCP-code
  tcp_md5: Use TCP extra-options on the input path

Mat Martineau (1):
  tcp: Register handlers for extra TCP options

 drivers/infiniband/hw/cxgb4/cm.c |    2 +-
 include/linux/inet_diag.h        |    1 +
 include/linux/tcp.h              |   43 +-
 include/linux/tcp_md5.h          |   39 ++
 include/net/inet_sock.h          |    3 +-
 include/net/tcp.h                |  209 +++---
 net/ipv4/Makefile                |    1 +
 net/ipv4/syncookies.c            |    6 +-
 net/ipv4/tcp.c                   |  399 +++++++++---
 net/ipv4/tcp_diag.c              |   81 +--
 net/ipv4/tcp_input.c             |  140 ++--
 net/ipv4/tcp_ipv4.c              |  545 ++--------------
 net/ipv4/tcp_md5.c               | 1340 ++++++++++++++++++++++++++++++++++++++
 net/ipv4/tcp_minisocks.c         |   75 +--
 net/ipv4/tcp_output.c            |  179 +----
 net/ipv6/syncookies.c            |    6 +-
 net/ipv6/tcp_ipv6.c              |  382 +----------
 net/smc/af_smc.c                 |  175 ++++-
 18 files changed, 2181 insertions(+), 1445 deletions(-)
 create mode 100644 include/linux/tcp_md5.h
 create mode 100644 net/ipv4/tcp_md5.c

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2.15.0