[PATCHv4 net-next 0/5] sctp: update from rfc7829

SCTP-PF was implemented based on a Internet-Draft in 2012:

  https://tools.ietf.org/html/draft-nishida-tsvwg-sctp-failover-05

It's been updated quite a few by rfc7829 in 2016.

This patchset adds the following features:

  1. add SCTP_ADDR_POTENTIALLY_FAILED notification
  2. add pf_expose per netns/sock/asoc
  3. add SCTP_EXPOSE_POTENTIALLY_FAILED_STATE sockopt
  4. add ps_retrans per netns/sock/asoc/transport
     (Primary Path Switchover)
  5. add spt_pathcpthld for SCTP_PEER_ADDR_THLDS sockopt

v1->v2:
  - See Patch 2/5 and Patch 5/5.
v2->v3:
  - See Patch 1/5, 2/5 and 3/5.
v3->v4:
  - See Patch 1/5, 2/5, 3/5 and 4/5.

Xin Long (5):
  sctp: add pf_expose per netns and sock and asoc
  sctp: add SCTP_ADDR_POTENTIALLY_FAILED notification
  sctp: add SCTP_EXPOSE_POTENTIALLY_FAILED_STATE sockopt
  sctp: add support for Primary Path Switchover
  sctp: add SCTP_PEER_ADDR_THLDS_V2 sockopt

 Documentation/networking/ip-sysctl.txt |  34 ++++++++
 include/net/netns/sctp.h               |  14 ++++
 include/net/sctp/constants.h           |  12 +++
 include/net/sctp/structs.h             |  13 ++-
 include/uapi/linux/sctp.h              |  15 ++++
 net/sctp/associola.c                   |  36 ++++----
 net/sctp/protocol.c                    |   6 ++
 net/sctp/sm_sideeffect.c               |   5 ++
 net/sctp/socket.c                      | 147 +++++++++++++++++++++++++++++----
 net/sctp/sysctl.c                      |  22 ++++-
 10 files changed, 266 insertions(+), 38 deletions(-)

-- 
2.1.0