[PATCH v21 00/24] Introducing OpenVPN Data Channel Offload

[Antonio Quartulli <antonio@openvpn.net>]

Notable changes since v20:
* removed newline at the end of message in NL_SET_ERR_MSG_FMT_MOD
* dropped udp_init() and related build_protos() and directly use
  .encap_destroy [instead of overriding sk->close()]
* defered peer_del() call to worker in case of transport errors, as
  we may be in non-sleepable context
* used kfree() instead of kfree_rcu() when releasing socket as we
  just invoked synchronize_rcu()
* fix comment in ovpn_tcp_parse()
* invoked peer->tcp.sk_cb.prot->release_cb instead of explicitly
  calling tcp_release_cb. This way we don't need to export it again
* moved call to peer_put() after call to peer->tcp.sk_cb.prot->close
* moved switch(mode) inside ovpn_peers_free()
* simplified skip logic in ovpn_peers_free()
* fixed check to avoid passing a negative delay to keepalive's
  schedule_work()

Please note that some patches were already reviewed/tested by a few
people. These patches have retained the tags as they have hardly been
touched.

The latest code can also be found at:

https://github.com/OpenVPN/ovpn-net-next

Thanks a lot!
Best Regards,

Antonio Quartulli
OpenVPN Inc.

To: netdev@vger.kernel.org
To: Eric Dumazet <edumazet@google.com>
To: Jakub Kicinski <kuba@kernel.org>
To: Paolo Abeni <pabeni@redhat.com>
To: Donald Hunter <donald.hunter@gmail.com>
To: Antonio Quartulli <antonio@openvpn.net>
To: Shuah Khan <shuah@kernel.org>
To: sd@queasysnail.net
To: ryazanov.s.a@gmail.com
To: Andrew Lunn <andrew+netdev@lunn.ch>
Cc: Simon Horman <horms@kernel.org>
Cc: linux-kernel@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Cc: Xiao Liang <shaw.leon@gmail.com>

Signed-off-by: Antonio Quartulli <antonio@openvpn.net>
---
Antonio Quartulli (24):
      net: introduce OpenVPN Data Channel Offload (ovpn)
      ovpn: add basic netlink support
      ovpn: add basic interface creation/destruction/management routines
      ovpn: keep carrier always on for MP interfaces
      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
      skb: implement skb_send_sock_locked_with_flags()
      ovpn: add support for MSG_NOSIGNAL in tcp_sendmsg
      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/get/dump/delete via netlink
      ovpn: implement key add/get/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/selftests: add test tool and scripts for ovpn module

 Documentation/netlink/specs/ovpn.yaml              |  371 +++
 Documentation/netlink/specs/rt_link.yaml           |   16 +
 MAINTAINERS                                        |   11 +
 drivers/net/Kconfig                                |   15 +
 drivers/net/Makefile                               |    1 +
 drivers/net/ovpn/Makefile                          |   22 +
 drivers/net/ovpn/bind.c                            |   55 +
 drivers/net/ovpn/bind.h                            |  101 +
 drivers/net/ovpn/crypto.c                          |  211 ++
 drivers/net/ovpn/crypto.h                          |  145 ++
 drivers/net/ovpn/crypto_aead.c                     |  408 ++++
 drivers/net/ovpn/crypto_aead.h                     |   33 +
 drivers/net/ovpn/io.c                              |  462 ++++
 drivers/net/ovpn/io.h                              |   34 +
 drivers/net/ovpn/main.c                            |  339 +++
 drivers/net/ovpn/main.h                            |   14 +
 drivers/net/ovpn/netlink-gen.c                     |  213 ++
 drivers/net/ovpn/netlink-gen.h                     |   41 +
 drivers/net/ovpn/netlink.c                         | 1249 ++++++++++
 drivers/net/ovpn/netlink.h                         |   18 +
 drivers/net/ovpn/ovpnpriv.h                        |   57 +
 drivers/net/ovpn/peer.c                            | 1352 +++++++++++
 drivers/net/ovpn/peer.h                            |  163 ++
 drivers/net/ovpn/pktid.c                           |  129 ++
 drivers/net/ovpn/pktid.h                           |   87 +
 drivers/net/ovpn/proto.h                           |  118 +
 drivers/net/ovpn/skb.h                             |   61 +
 drivers/net/ovpn/socket.c                          |  244 ++
 drivers/net/ovpn/socket.h                          |   49 +
 drivers/net/ovpn/stats.c                           |   21 +
 drivers/net/ovpn/stats.h                           |   47 +
 drivers/net/ovpn/tcp.c                             |  592 +++++
 drivers/net/ovpn/tcp.h                             |   36 +
 drivers/net/ovpn/udp.c                             |  442 ++++
 drivers/net/ovpn/udp.h                             |   25 +
 include/linux/skbuff.h                             |    2 +
 include/uapi/linux/if_link.h                       |   15 +
 include/uapi/linux/ovpn.h                          |  110 +
 include/uapi/linux/udp.h                           |    1 +
 net/core/skbuff.c                                  |   18 +-
 net/ipv6/af_inet6.c                                |    1 +
 net/ipv6/udp.c                                     |    1 +
 tools/testing/selftests/Makefile                   |    1 +
 tools/testing/selftests/net/ovpn/.gitignore        |    2 +
 tools/testing/selftests/net/ovpn/Makefile          |   31 +
 tools/testing/selftests/net/ovpn/common.sh         |   92 +
 tools/testing/selftests/net/ovpn/config            |   10 +
 tools/testing/selftests/net/ovpn/data64.key        |    5 +
 tools/testing/selftests/net/ovpn/ovpn-cli.c        | 2395 ++++++++++++++++++++
 tools/testing/selftests/net/ovpn/tcp_peers.txt     |    5 +
 .../testing/selftests/net/ovpn/test-chachapoly.sh  |    9 +
 .../selftests/net/ovpn/test-close-socket-tcp.sh    |    9 +
 .../selftests/net/ovpn/test-close-socket.sh        |   45 +
 tools/testing/selftests/net/ovpn/test-float.sh     |    9 +
 tools/testing/selftests/net/ovpn/test-tcp.sh       |    9 +
 tools/testing/selftests/net/ovpn/test.sh           |  113 +
 tools/testing/selftests/net/ovpn/udp_peers.txt     |    5 +
 57 files changed, 10065 insertions(+), 5 deletions(-)
---
base-commit: fb05579a176f7bccc8d279665fc0e46dfed43dfb
change-id: 20250304-b4-ovpn-tmp-153379e78603

Best regards,
-- 
Antonio Quartulli <antonio@openvpn.net>