[net-next,v8,00/24] Introducing OpenVPN Data Channel Offload

This is the 8th version of the ovpn patchset.

Thanks Sergey for arguing regarding splitting PEER_SET into SET and NEW.
I decided to follow this suggestion as it makes the API and its return
value easier to work with.

Thanks Donald for the suggestions regarding the NL API - they have all
been implemented (unless I forgot some, but hopefully I did not).

Notable changes from v7:

* Netlink API adjustments:
** renamed NL API from OP_OBJ to OBJ_OP (i.e. from SET_PEER to PEER_SET)
** split PEER_SET from PEER_NEW for better clarity in case of error
** renamed NL API from NEW/DEL_IFACE to DEV_NEW/DEL
** converted all underscores to dashes in YML NL spec
** split sockaddr_remote attr into ipv4/6, port and v6_scope_id attrs
** split local_ip attr into local_ipv4 and local_ipv6 attrs
** turned keyconf into a root attribute (it was nested in peer before)
** made key_swap use a keyconf object rather than a peer for consistency
   with key mgmt API
** created specific op for peer_del notification (peer_del_ntf)
** created specific op for key_swap notification (key_swap_ntf)
** allow user to update VPN IPv4/6 (peer is now rehashable)
** converted port attrs from u32 to u16 for better consistency with
   userspace code
* added rtnl_ops .dellink implementation
* removed patch 2 as it's not needed anymore thanks to the point
  above
* moved rtnl_ops .kind initialization to first patch
* updated MAINTAINERS file with Github tree and selftest folder
* wrapped long lines in selftest scripts

BONUS: used b4 for the first time to prepare the patchset and send it

Please note that patches previously reviewed by Andrew Lunn have
retained the Reviewed-by tag as they have been simply rebased without
any modification.

The latest code can also be found at:

https://github.com/OpenVPN/linux-kernel-ovpn

Thanks a lot!
Best Regards,

Antonio Quartulli
OpenVPN Inc.

---
Antonio Quartulli (24):
      netlink: add NLA_POLICY_MAX_LEN macro
      net: introduce OpenVPN Data Channel Offload (ovpn)
      ovpn: add basic netlink support
      ovpn: add basic interface creation/destruction/management routines
      ovpn: implement interface creation/destruction via netlink
      ovpn: keep carrier always on
      ovpn: introduce the ovpn_peer object
      ovpn: introduce the ovpn_socket object
      ovpn: implement basic TX path (UDP)
      ovpn: implement basic RX path (UDP)
      ovpn: implement packet processing
      ovpn: store tunnel and transport statistics
      ovpn: implement TCP transport
      ovpn: implement multi-peer support
      ovpn: implement peer lookup logic
      ovpn: implement keepalive mechanism
      ovpn: add support for updating local UDP endpoint
      ovpn: add support for peer floating
      ovpn: implement peer add/dump/delete via netlink
      ovpn: implement key add/del/swap via netlink
      ovpn: kill key and notify userspace in case of IV exhaustion
      ovpn: notify userspace when a peer is deleted
      ovpn: add basic ethtool support
      testing/selftest: add test tool and scripts for ovpn module

 Documentation/netlink/specs/ovpn.yaml             |  387 +++++
 MAINTAINERS                                       |   11 +
 drivers/net/Kconfig                               |   15 +
 drivers/net/Makefile                              |    1 +
 drivers/net/ovpn/Makefile                         |   22 +
 drivers/net/ovpn/bind.c                           |   54 +
 drivers/net/ovpn/bind.h                           |  117 ++
 drivers/net/ovpn/crypto.c                         |  172 ++
 drivers/net/ovpn/crypto.h                         |  138 ++
 drivers/net/ovpn/crypto_aead.c                    |  356 ++++
 drivers/net/ovpn/crypto_aead.h                    |   31 +
 drivers/net/ovpn/io.c                             |  459 ++++++
 drivers/net/ovpn/io.h                             |   25 +
 drivers/net/ovpn/main.c                           |  363 ++++
 drivers/net/ovpn/main.h                           |   29 +
 drivers/net/ovpn/netlink-gen.c                    |  224 +++
 drivers/net/ovpn/netlink-gen.h                    |   42 +
 drivers/net/ovpn/netlink.c                        | 1099 +++++++++++++
 drivers/net/ovpn/netlink.h                        |   18 +
 drivers/net/ovpn/ovpnstruct.h                     |   60 +
 drivers/net/ovpn/packet.h                         |   40 +
 drivers/net/ovpn/peer.c                           | 1207 ++++++++++++++
 drivers/net/ovpn/peer.h                           |  172 ++
 drivers/net/ovpn/pktid.c                          |  130 ++
 drivers/net/ovpn/pktid.h                          |   87 +
 drivers/net/ovpn/proto.h                          |  104 ++
 drivers/net/ovpn/skb.h                            |   61 +
 drivers/net/ovpn/socket.c                         |  165 ++
 drivers/net/ovpn/socket.h                         |   53 +
 drivers/net/ovpn/stats.c                          |   21 +
 drivers/net/ovpn/stats.h                          |   47 +
 drivers/net/ovpn/tcp.c                            |  506 ++++++
 drivers/net/ovpn/tcp.h                            |   43 +
 drivers/net/ovpn/udp.c                            |  406 +++++
 drivers/net/ovpn/udp.h                            |   26 +
 include/net/netlink.h                             |    1 +
 include/uapi/linux/ovpn.h                         |  116 ++
 include/uapi/linux/udp.h                          |    1 +
 tools/net/ynl/ynl-gen-c.py                        |    2 +
 tools/testing/selftests/Makefile                  |    1 +
 tools/testing/selftests/net/ovpn/.gitignore       |    2 +
 tools/testing/selftests/net/ovpn/Makefile         |   18 +
 tools/testing/selftests/net/ovpn/config           |    8 +
 tools/testing/selftests/net/ovpn/data-test-tcp.sh |    9 +
 tools/testing/selftests/net/ovpn/data-test.sh     |  153 ++
 tools/testing/selftests/net/ovpn/data64.key       |    5 +
 tools/testing/selftests/net/ovpn/float-test.sh    |  118 ++
 tools/testing/selftests/net/ovpn/ovpn-cli.c       | 1822 +++++++++++++++++++++
 tools/testing/selftests/net/ovpn/tcp_peers.txt    |    5 +
 tools/testing/selftests/net/ovpn/udp_peers.txt    |    5 +
 50 files changed, 8957 insertions(+)
---
base-commit: 44badc908f2c85711cb18e45e13119c10ad3a05f
change-id: 20241002-b4-ovpn-eeee35c694a2

Best regards,