On Tue, Dec 15, 2020 at 12:28:28PM +0100, Eelco Chaudron wrote:
> Hi Martin,
> 
> See below some small documentation comments.
> 
> The code itself looks good and tested fine.
> 
> //Eelco
> 
> 
> On 14 Dec 2020, at 13:40, Martin Varghese wrote:
> 
> > From: Martin Varghese <martin.vargh...@nokia.com>
> > 
> > There are various L3 encapsulation standards using UDP being discussed
> > to
> > leverage the UDP based load balancing capability of different networks.
> > MPLSoUDP (__ https://tools.ietf.org/html/rfc7510) is one among them.
> > 
> > The Bareudp tunnel provides a generic L3 encapsulation support for
> > tunnelling different L3 protocols like MPLS, IP, NSH etc. inside a UDP
> > tunnel.
> > 
> > An example to create bareudp device to tunnel MPLS traffic is
> > given
> > 
> > $ ovs-vsctl add-port br_mpls udp_port -- set interface udp_port \
> >              type=bareudp options:remote_ip=2.1.1.3
> >              options:local_ip=2.1.1.2 \
> >              options:payload_type=0x8847 options:dst_port=6635
> > 
> > The bareudp device supports special handling for MPLS & IP as
> > they can have multiple ethertypes. MPLS procotcol can have ethertypes
> > ETH_P_MPLS_UC (unicast) & ETH_P_MPLS_MC (multicast). IP protocol can
> > have
> > ethertypes ETH_P_IP (v4) & ETH_P_IPV6 (v6).
> > 
> > The bareudp device to tunnel L3 traffic with multiple ethertypes
> > (MPLS & IP) can be created by passing the L3 protocol name as string in
> > the field payload_type. An example to create bareudp device to tunnel
> > MPLS unicast & multicast traffic is given below.::
> > 
> > $ ovs-vsctl add-port  br_mpls udp_port -- set interface
> >             udp_port \
> >             type=bareudp options:remote_ip=2.1.1.3
> >             options:local_ip=2.1.1.2 \
> >             options:payload_type=mpls options:dst_port=6635
> > 
> > Signed-off-by: Martin Varghese <martin.vargh...@nokia.com>
> > Acked-By: Greg Rose <gvrose8...@gmail.com>
> > Tested-by: Greg Rose <gvrose8...@gmail.com>
> > ---
> > Changes in v2:
> >     - Removed vport-bareudp module.
> > 
> > Changes in v3:
> >     - Added net-next upstream commit id and message to commit message.
> > 
> > Changes in v4:
> >     - Removed kernel datapath changes.
> > 
> > Changes in v5:
> >     - Fixed release notes errors.
> >     - Fixed coding errors in dpif-nelink-rtnl.c.
> > 
> > Changes in v6:
> >     - Added code to enable rx metadata collection in the kernel device.
> >     - Added version history.
> > 
> > Changes in v7:
> >     - Fixed release notes errors.
> >     - Added Skip tests for older kernels.
> >     - Changes bareudp ovs_vport_type to 111.
> >     - Added Acked-by & tested by from gvrose8...@gmail.com
> > 
> > Changes in v8:
> >     - The code added in v6 to enable rx metadata collection in
> >       the kernel device is removed. This flag was never added to any of
> >       the kernel release. The rx metadata collection is always enabled
> > in
> >       kernel bareudp module.
> > 
> > Changes in v9:
> >     - Fixed documentation errors.
> >     - Added example usage to create bareudp device for tunnelling IP.
> >     - Added tests for tunnelling IP.
> >     - Check to restrict configuratoin of starting source port range as
> >       ephemeral port for MPLS alone is removed.
> >     - Fixed errors in the handling of input string for the argument
> >       payload_type.
> > 
> >  Documentation/automake.mk                     |  1 +
> >  Documentation/faq/bareudp.rst                 | 83 ++++++++++++++++
> >  Documentation/faq/index.rst                   |  1 +
> >  Documentation/faq/releases.rst                |  1 +
> >  NEWS                                          |  5 +-
> >  .../linux/compat/include/linux/openvswitch.h  |  9 ++
> >  lib/dpif-netlink-rtnl.c                       | 50 ++++++++++
> >  lib/dpif-netlink.c                            |  5 +
> >  lib/netdev-vport.c                            | 35 ++++++-
> >  lib/netdev.h                                  |  1 +
> >  ofproto/ofproto-dpif-xlate.c                  |  1 +
> >  tests/system-layer3-tunnels.at                | 96 +++++++++++++++++++
> >  vswitchd/vswitch.xml                          | 20 ++++
> >  13 files changed, 305 insertions(+), 3 deletions(-)
> >  create mode 100644 Documentation/faq/bareudp.rst
> > 
> > diff --git a/Documentation/automake.mk b/Documentation/automake.mk
> > index f85c4320e..ea3475f35 100644
> > --- a/Documentation/automake.mk
> > +++ b/Documentation/automake.mk
> > @@ -88,6 +88,7 @@ DOC_SOURCE = \
> >     Documentation/faq/terminology.rst \
> >     Documentation/faq/vlan.rst \
> >     Documentation/faq/vxlan.rst \
> > +   Documentation/faq/bareudp.rst \
> >     Documentation/internals/index.rst \
> >     Documentation/internals/authors.rst \
> >     Documentation/internals/bugs.rst \
> > diff --git a/Documentation/faq/bareudp.rst
> > b/Documentation/faq/bareudp.rst
> > new file mode 100644
> > index 000000000..0e58a3b8e
> > --- /dev/null
> > +++ b/Documentation/faq/bareudp.rst
> > @@ -0,0 +1,83 @@
> > +..
> > +      Licensed under the Apache License, Version 2.0 (the "License");
> > you may
> > +      not use this file except in compliance with the License. You may
> > obtain
> > +      a copy of the License at
> > +
> > +          http://www.apache.org/licenses/LICENSE-2.0
> > +
> > +      Unless required by applicable law or agreed to in writing,
> > software
> > +      distributed under the License is distributed on an "AS IS" BASIS,
> > WITHOUT
> > +      WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
> > See the
> > +      License for the specific language governing permissions and
> > limitations
> > +      under the License.
> > +
> > +      Convention for heading levels in Open vSwitch documentation:
> > +
> > +      =======  Heading 0 (reserved for the title in a document)
> > +      -------  Heading 1
> > +      ~~~~~~~  Heading 2
> > +      +++++++  Heading 3
> > +      '''''''  Heading 4
> > +
> > +      Avoid deeper levels because they do not render well.
> > +
> > +=======
> > +Bareudp
> > +=======
> > +
> > +Q: What is Bareudp?
> > +
> > +    A: There are various L3 encapsulation standards using UDP being
> > discussed
> > +       to leverage the UDP based load balancing capability of different
> > +       networks. MPLSoUDP (__ https://tools.ietf.org/html/rfc7510) is
> > one among
> > +       them.
> > +
> > +       The Bareudp tunnel provides a generic L3 encapsulation support
> > for
> > +       tunnelling different L3 protocols like MPLS, IP, NSH etc. inside
> > a UDP
> > +       tunnel.
> > +
> > +       An example to create bareudp device to tunnel MPLS
> > unicasttraffic is
> > +       given below.::
> > +
> > +           $ ovs-vsctl add-port br0 mpls_udp_port -- set interface
> > udp_port \
> > +             type=bareudp options:remote_ip=2.1.1.3
> > options:local_ip=2.1.1.2 \
> > +             options:payload_type=0x8847 options:dst_port=6635
> > +
> > +       The option payload_type specifies the ethertype of the l3
> > protocol which
> > +       the bareudp device will be tunnelling.
> > +
> > +       The bareudp device supports special handling for MPLS & IP as
> > they can
> > +       have multiple ethertypes.
> > +       MPLS procotcol can have ethertypes ETH_P_MPLS_UC (unicast) &
> > +       ETH_P_MPLS_MC (multicast). IP protocol can have ethertypes
> > ETH_P_IP (v4)
> > +       & ETH_P_IPV6 (v6).
> > +
> > +       The bareudp device to tunnel L3 traffic with multiple ethertypes
> > +       (MPLS & IP) can be created by passing the L3 protocol name as
> > string in
> > +       the field payload_type.
> > +
> > +       An example to create bareudp device to tunnel
> > +       MPLS unicast & multicast traffic is given below.::
> > +
> > +           $ ovs-vsctl add-port  br0 mpls_udp_port -- set interface
> > udp_port \
> > +             type=bareudp options:remote_ip=2.1.1.3
> > options:local_ip=2.1.1.2 \
> > +             options:payload_type=mpls options:dst_port=6635
> > +
> > +       An example to create bareudp device to tunnel
> > +       IPv4 & IPv6 traffic is given below.::
> > +
> > +           $ ovs-vsctl add-port  br0 ip_udp_port -- set interface
> > udp_port \
> > +             type=bareudp options:remote_ip=2.1.1.3
> > options:local_ip=2.1.1.2 \
> > +             options:payload_type=IP options:dst_port=6636
> 
> Small nit, maybe put the flow example below, above the IP examples.
> 
will rearrange.
> > +       The below example ovs rule shows how a bareudp tunnel port is
> > used to
> > +       tunnel an MPLS packet inside a UDP tunnel.::
> > +
> > +          $ ovs-ofctl -O OpenFlow13 add-flow br0
> > "in_port=10,dl_type=0x0800,\
> > +            actions=push_mpls:0x8847,set_field:13->mpls_label,\
> 
> Can you change 13 above to 3, as 13 is a reserved label that will mess up
> the packet decodes (on Wireshark for example)?
>
Will change
> > +            output:mpls_udp_port"
> > +
> > +       This rule does MPLS encapsulation on IP packets and sends the l3
> > MPLS
> > +       packets on a bareudp tunnel port which has its payload_type
> > configured
> > +       to 0x8847.
> > +
> > diff --git a/Documentation/faq/index.rst b/Documentation/faq/index.rst
> > index 334b828b2..1dd29986a 100644
> > --- a/Documentation/faq/index.rst
> > +++ b/Documentation/faq/index.rst
> > @@ -30,6 +30,7 @@ Open vSwitch FAQ
> >  .. toctree::
> >     :maxdepth: 2
> > 
> > +   bareudp
> >     configuration
> >     contributing
> >     design
> > diff --git a/Documentation/faq/releases.rst
> > b/Documentation/faq/releases.rst
> > index 3623e3f40..68cbf1dbc 100644
> > --- a/Documentation/faq/releases.rst
> > +++ b/Documentation/faq/releases.rst
> > @@ -138,6 +138,7 @@ Q: Are all features available with all datapaths?
> >      Tunnel - ERSPAN                 4.18           2.10         2.10
> > NO
> >      Tunnel - ERSPAN-IPv6            4.18           2.10         2.10
> > NO
> >      Tunnel - GTP-U                  NO             NO           2.14
> > NO
> > +    Tunnel - Bareudp                5.7            NO           NO
> > NO
> >      QoS - Policing                  YES            1.1          2.6
> > NO
> >      QoS - Shaping                   YES            1.1          NO
> > NO
> >      sFlow                           YES            1.0          1.0
> > NO
> > diff --git a/NEWS b/NEWS
> > index 7e291a180..e3bc34a3f 100644
> > --- a/NEWS
> > +++ b/NEWS
> > @@ -75,7 +75,10 @@ v2.14.0 - 17 Aug 2020
> >     - GTP-U Tunnel Protocol
> >       * Add two new fields: tun_gtpu_flags, tun_gtpu_msgtype.
> >       * Only support for userspace datapath.
> > -
> > +   - Bareudp Tunnel
> > +     * Bareudp device support is present in linux kernel from version
> > 5.7
> > +     * Kernel bareudp device is not backported to ovs tree.
> > +     * Userspace datapath support is not added
> > 
> >  v2.13.0 - 14 Feb 2020
> >  ---------------------
> > diff --git a/datapath/linux/compat/include/linux/openvswitch.h
> > b/datapath/linux/compat/include/linux/openvswitch.h
> > index 2d884312f..53d4225ec 100644
> > --- a/datapath/linux/compat/include/linux/openvswitch.h
> > +++ b/datapath/linux/compat/include/linux/openvswitch.h
> > @@ -246,6 +246,7 @@ enum ovs_vport_type {
> >     OVS_VPORT_TYPE_IP6ERSPAN = 108, /* ERSPAN tunnel. */
> >     OVS_VPORT_TYPE_IP6GRE = 109,
> >     OVS_VPORT_TYPE_GTPU = 110,
> > +   OVS_VPORT_TYPE_BAREUDP = 111,  /* Bareudp tunnel. */
> >     __OVS_VPORT_TYPE_MAX
> >  };
> > 
> > @@ -308,6 +309,14 @@ enum {
> > 
> >  #define OVS_VXLAN_EXT_MAX (__OVS_VXLAN_EXT_MAX - 1)
> > 
> > +enum {
> > +        OVS_BAREUDP_EXT_UNSPEC,
> > +        OVS_BAREUDP_EXT_MULTIPROTO_MODE,
> > +        __OVS_BAREUDP_EXT_MAX,
> > +};
> > +
> > +#define OVS_BAREUDP_EXT_MAX (__OVS_BAREUDP_EXT_MAX - 1)
> > +
> >  /* OVS_VPORT_ATTR_OPTIONS attributes for tunnels.
> >   */
> >  enum {
> > diff --git a/lib/dpif-netlink-rtnl.c b/lib/dpif-netlink-rtnl.c
> > index fd157ce2d..6e1243ae7 100644
> > --- a/lib/dpif-netlink-rtnl.c
> > +++ b/lib/dpif-netlink-rtnl.c
> > @@ -58,6 +58,18 @@ VLOG_DEFINE_THIS_MODULE(dpif_netlink_rtnl);
> >  #define IFLA_GENEVE_UDP_ZERO_CSUM6_RX 10
> >  #endif
> > 
> > +#ifndef __IFLA_BAREUDP_MAX
> > +#define IFLA_BAREUDP_MAX 0
> > +#endif
> > +#if IFLA_BAREUDP_MAX < 4
> > +#define IFLA_BAREUDP_PORT 1
> > +#define IFLA_BAREUDP_ETHERTYPE 2
> > +#define IFLA_BAREUDP_SRCPORT_MIN 3
> > +#define IFLA_BAREUDP_MULTIPROTO_MODE 4
> > +#endif
> > +
> > +#define BAREUDP_EPHEMERAL_SRCPORT_MIN 49153
> 
> Not sure if ephemeral makes sense here, as the stream could be very
> long-lived?
> Why not just cap it BAREUDP_SRCPORT_MIN?
> 
ok
> > +
> >  static const struct nl_policy rtlink_policy[] = {
> >      [IFLA_LINKINFO] = { .type = NL_A_NESTED },
> >  };
> > @@ -81,6 +93,10 @@ static const struct nl_policy geneve_policy[] = {
> >      [IFLA_GENEVE_UDP_ZERO_CSUM6_RX] = { .type = NL_A_U8 },
> >      [IFLA_GENEVE_PORT] = { .type = NL_A_U16 },
> >  };
> > +static const struct nl_policy bareudp_policy[] = {
> > +    [IFLA_BAREUDP_PORT] = { .type = NL_A_U16 },
> > +    [IFLA_BAREUDP_ETHERTYPE] = { .type = NL_A_U16 },
> > +};
> > 
> >  static const char *
> >  vport_type_to_kind(enum ovs_vport_type type,
> > @@ -113,6 +129,8 @@ vport_type_to_kind(enum ovs_vport_type type,
> >          }
> >      case OVS_VPORT_TYPE_GTPU:
> >          return NULL;
> > +    case OVS_VPORT_TYPE_BAREUDP:
> > +        return "bareudp";
> >      case OVS_VPORT_TYPE_NETDEV:
> >      case OVS_VPORT_TYPE_INTERNAL:
> >      case OVS_VPORT_TYPE_LISP:
> > @@ -243,6 +261,24 @@ dpif_netlink_rtnl_geneve_verify(const struct
> > netdev_tunnel_config *tnl_cfg,
> > 
> >      return err;
> >  }
> > +static int
> > +dpif_netlink_rtnl_bareudp_verify(const struct netdev_tunnel_config
> > *tnl_cfg,
> > +                                const char *kind, struct ofpbuf *reply)
> > +{
> > +    struct nlattr *bareudp[ARRAY_SIZE(bareudp_policy)];
> > +    int err;
> > +
> > +    err = rtnl_policy_parse(kind, reply, bareudp_policy, bareudp,
> > +                            ARRAY_SIZE(bareudp_policy));
> > +    if (!err) {
> > +        if ((tnl_cfg->dst_port !=
> > nl_attr_get_be16(bareudp[IFLA_BAREUDP_PORT]))
> > +            || (tnl_cfg->payload_ethertype
> > +                != nl_attr_get_be16(bareudp[IFLA_BAREUDP_ETHERTYPE])))
> > {
> > +            err = EINVAL;
> > +        }
> > +    }
> > +    return err;
> > +}
> > 
> >  static int
> >  dpif_netlink_rtnl_verify(const struct netdev_tunnel_config *tnl_cfg,
> > @@ -275,6 +311,9 @@ dpif_netlink_rtnl_verify(const struct
> > netdev_tunnel_config *tnl_cfg,
> >      case OVS_VPORT_TYPE_GENEVE:
> >          err = dpif_netlink_rtnl_geneve_verify(tnl_cfg, kind, reply);
> >          break;
> > +    case OVS_VPORT_TYPE_BAREUDP:
> > +        err = dpif_netlink_rtnl_bareudp_verify(tnl_cfg, kind, reply);
> > +        break;
> >      case OVS_VPORT_TYPE_NETDEV:
> >      case OVS_VPORT_TYPE_INTERNAL:
> >      case OVS_VPORT_TYPE_LISP:
> > @@ -357,6 +396,16 @@ dpif_netlink_rtnl_create(const struct
> > netdev_tunnel_config *tnl_cfg,
> >          nl_msg_put_u8(&request, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, 1);
> >          nl_msg_put_be16(&request, IFLA_GENEVE_PORT, tnl_cfg->dst_port);
> >          break;
> > +    case OVS_VPORT_TYPE_BAREUDP:
> > +        nl_msg_put_be16(&request, IFLA_BAREUDP_ETHERTYPE,
> > +                        tnl_cfg->payload_ethertype);
> > +        nl_msg_put_u16(&request, IFLA_BAREUDP_SRCPORT_MIN,
> > +                       BAREUDP_EPHEMERAL_SRCPORT_MIN);
> > +        nl_msg_put_be16(&request, IFLA_BAREUDP_PORT,
> > tnl_cfg->dst_port);
> > +        if (tnl_cfg->exts & (1 << OVS_BAREUDP_EXT_MULTIPROTO_MODE)) {
> > +            nl_msg_put_flag(&request, IFLA_BAREUDP_MULTIPROTO_MODE);
> > +        }
> > +        break;
> >      case OVS_VPORT_TYPE_NETDEV:
> >      case OVS_VPORT_TYPE_INTERNAL:
> >      case OVS_VPORT_TYPE_LISP:
> > @@ -470,6 +519,7 @@ dpif_netlink_rtnl_port_destroy(const char *name,
> > const char *type)
> >      case OVS_VPORT_TYPE_ERSPAN:
> >      case OVS_VPORT_TYPE_IP6ERSPAN:
> >      case OVS_VPORT_TYPE_IP6GRE:
> > +    case OVS_VPORT_TYPE_BAREUDP:
> >          return dpif_netlink_rtnl_destroy(name);
> >      case OVS_VPORT_TYPE_NETDEV:
> >      case OVS_VPORT_TYPE_INTERNAL:
> > diff --git a/lib/dpif-netlink.c b/lib/dpif-netlink.c
> > index 6858ba612..d1a1cc723 100644
> > --- a/lib/dpif-netlink.c
> > +++ b/lib/dpif-netlink.c
> > @@ -752,6 +752,9 @@ get_vport_type(const struct dpif_netlink_vport
> > *vport)
> >      case OVS_VPORT_TYPE_GTPU:
> >          return "gtpu";
> > 
> > +    case OVS_VPORT_TYPE_BAREUDP:
> > +        return "bareudp";
> > +
> >      case OVS_VPORT_TYPE_UNSPEC:
> >      case __OVS_VPORT_TYPE_MAX:
> >          break;
> > @@ -787,6 +790,8 @@ netdev_to_ovs_vport_type(const char *type)
> >          return OVS_VPORT_TYPE_GRE;
> >      } else if (!strcmp(type, "gtpu")) {
> >          return OVS_VPORT_TYPE_GTPU;
> > +    } else if (!strcmp(type, "bareudp")) {
> > +        return OVS_VPORT_TYPE_BAREUDP;
> >      } else {
> >          return OVS_VPORT_TYPE_UNSPEC;
> >      }
> > diff --git a/lib/netdev-vport.c b/lib/netdev-vport.c
> > index 0252b61de..15567e524 100644
> > --- a/lib/netdev-vport.c
> > +++ b/lib/netdev-vport.c
> > @@ -47,6 +47,7 @@
> >  #include "unaligned.h"
> >  #include "unixctl.h"
> >  #include "openvswitch/vlog.h"
> > +#include "openvswitch/ofp-parse.h"
> >  #ifdef __linux__
> >  #include "netdev-linux.h"
> >  #endif
> > @@ -112,7 +113,7 @@ netdev_vport_needs_dst_port(const struct netdev
> > *dev)
> >      return (class->get_config == get_tunnel_config &&
> >              (!strcmp("geneve", type) || !strcmp("vxlan", type) ||
> >               !strcmp("lisp", type) || !strcmp("stt", type) ||
> > -             !strcmp("gtpu", type)));
> > +             !strcmp("gtpu", type) || !strcmp("bareudp",type)));
> >  }
> > 
> >  const char *
> > @@ -219,6 +220,8 @@ netdev_vport_construct(struct netdev *netdev_)
> >          dev->tnl_cfg.dst_port = port ? htons(port) :
> > htons(STT_DST_PORT);
> >      } else if (!strcmp(type, "gtpu")) {
> >          dev->tnl_cfg.dst_port = port ? htons(port) :
> > htons(GTPU_DST_PORT);
> > +    } else if (!strcmp(type, "bareudp")) {
> > +        dev->tnl_cfg.dst_port = htons(port);
> >      }
> > 
> >      dev->tnl_cfg.dont_fragment = true;
> > @@ -438,6 +441,8 @@ tunnel_supported_layers(const char *type,
> >          return TNL_L2 | TNL_L3;
> >      } else if (!strcmp(type, "gtpu")) {
> >          return TNL_L3;
> > +    } else if (!strcmp(type, "bareudp")) {
> > +        return TNL_L3;
> >      } else {
> >          return TNL_L2;
> >      }
> > @@ -745,6 +750,23 @@ set_tunnel_config(struct netdev *dev_, const struct
> > smap *args, char **errp)
> >                      goto out;
> >                  }
> >              }
> > +        } else if (!strcmp(node->key, "payload_type")) {
> > +            if (!strcmp(node->value, "mpls")) {
> > +                 tnl_cfg.payload_ethertype = htons(ETH_TYPE_MPLS);
> > +                 tnl_cfg.exts |= (1 <<
> > OVS_BAREUDP_EXT_MULTIPROTO_MODE);
> > +            } else if (!strcmp(node->value, "ip")) {
> > +                 tnl_cfg.payload_ethertype = htons(ETH_TYPE_IP);
> > +                 tnl_cfg.exts |= (1 <<
> > OVS_BAREUDP_EXT_MULTIPROTO_MODE);
> > +            } else {
> > +                 uint16_t payload_ethertype;
> > +
> > +                 if (str_to_u16(node->value, "payload_type",
> > +                                &payload_ethertype)) {
> > +                     err = EINVAL;
> > +                     goto out;
> > +                 }
> > +                 tnl_cfg.payload_ethertype = htons(payload_ethertype);
> > +            }
> >          } else {
> >              ds_put_format(&errors, "%s: unknown %s argument '%s'\n",
> > name,
> >                            type, node->key);
> > @@ -917,7 +939,8 @@ get_tunnel_config(const struct netdev *dev, struct
> > smap *args)
> >              (!strcmp("vxlan", type) && dst_port != VXLAN_DST_PORT) ||
> >              (!strcmp("lisp", type) && dst_port != LISP_DST_PORT) ||
> >              (!strcmp("stt", type) && dst_port != STT_DST_PORT) ||
> > -            (!strcmp("gtpu", type) && dst_port != GTPU_DST_PORT)) {
> > +            (!strcmp("gtpu", type) && dst_port != GTPU_DST_PORT) ||
> > +            !strcmp("bareudp", type)) {
> >              smap_add_format(args, "dst_port", "%d", dst_port);
> >          }
> >      }
> > @@ -1243,6 +1266,14 @@ netdev_vport_tunnel_register(void)
> >            },
> >            {{NULL, NULL, 0, 0}}
> >          },
> > +        { "udp_sys",
> > +          {
> > +              TUNNEL_FUNCTIONS_COMMON,
> > +              .type = "bareudp",
> > +              .get_ifindex = NETDEV_VPORT_GET_IFINDEX,
> > +          },
> > +          {{NULL, NULL, 0, 0}}
> > +        },
> > 
> >      };
> >      static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER;
> > diff --git a/lib/netdev.h b/lib/netdev.h
> > index fb5073056..b705a9e56 100644
> > --- a/lib/netdev.h
> > +++ b/lib/netdev.h
> > @@ -107,6 +107,7 @@ struct netdev_tunnel_config {
> >      bool out_key_flow;
> >      ovs_be64 out_key;
> > 
> > +    ovs_be16 payload_ethertype;
> >      ovs_be16 dst_port;
> > 
> >      bool ip_src_flow;
> > diff --git a/ofproto/ofproto-dpif-xlate.c b/ofproto/ofproto-dpif-xlate.c
> > index 11aa20754..7eeff14f6 100644
> > --- a/ofproto/ofproto-dpif-xlate.c
> > +++ b/ofproto/ofproto-dpif-xlate.c
> > @@ -3573,6 +3573,7 @@ propagate_tunnel_data_to_flow(struct xlate_ctx
> > *ctx, struct eth_addr dmac,
> >      case OVS_VPORT_TYPE_VXLAN:
> >      case OVS_VPORT_TYPE_GENEVE:
> >      case OVS_VPORT_TYPE_GTPU:
> > +    case OVS_VPORT_TYPE_BAREUDP:
> >          nw_proto = IPPROTO_UDP;
> >          break;
> >      case OVS_VPORT_TYPE_LISP:
> > diff --git a/tests/system-layer3-tunnels.at
> > b/tests/system-layer3-tunnels.at
> > index 1232964bb..d21fd777d 100644
> > --- a/tests/system-layer3-tunnels.at
> > +++ b/tests/system-layer3-tunnels.at
> > @@ -152,3 +152,99 @@ AT_CHECK([tail -1 stdout], [0],
> > 
> >  OVS_VSWITCHD_STOP
> >  AT_CLEANUP
> > +
> > +AT_SETUP([layer3 - ping over MPLS Bareudp])
> > +OVS_CHECK_MIN_KERNEL(5, 7)
> > +OVS_TRAFFIC_VSWITCHD_START([_ADD_BR([br1])])
> > +ADD_NAMESPACES(at_ns0, at_ns1)
> > +
> > +ADD_VETH(p0, at_ns0, br0, "10.1.1.1/24", "36:b1:ee:7c:01:01")
> > +ADD_VETH(p1, at_ns1, br1, "10.1.1.2/24", "36:b1:ee:7c:01:02")
> > +
> > +ADD_OVS_TUNNEL([bareudp], [br0], [at_bareudp0], [8.1.1.3],
> > [8.1.1.2/24],
> > +               [ options:local_ip=8.1.1.2
> > options:packet_type="legacy_l3" options:payload_type=mpls
> > options:dst_port=6635])
> > +
> > +ADD_OVS_TUNNEL([bareudp], [br1], [at_bareudp1], [8.1.1.2],
> > [8.1.1.3/24],
> > +               [options:local_ip=8.1.1.3
> > options:packet_type="legacy_l3" options:payload_type=mpls
> > options:dst_port=6635])
> > +
> > +AT_DATA([flows0.txt], [dnl
> > +table=0,priority=100,dl_type=0x0800
> > actions=push_mpls:0x8847,set_mpls_label:3,output:at_bareudp0
> > +table=0,priority=100,dl_type=0x8847 in_port=at_bareudp0 
> > actions=pop_mpls:0x0800,set_field:36:b1:ee:7c:01:01->dl_dst,set_field:36:b1:ee:7c:01:02->dl_src,output:ovs-p0
> > +table=0,priority=10 actions=normal
> > +])
> > +
> > +AT_DATA([flows1.txt], [dnl
> > +table=0,priority=100,dl_type=0x0800
> > actions=push_mpls:0x8847,set_mpls_label:3,output:at_bareudp1
> > +table=0,priority=100,dl_type=0x8847 in_port=at_bareudp1 
> > actions=pop_mpls:0x0800,set_field:36:b1:ee:7c:01:02->dl_dst,set_field:36:b1:ee:7c:01:01->dl_src,output:ovs-p1
> > +table=0,priority=10 actions=normal
> > +])
> > +
> > +AT_CHECK([ip link add patch0 type veth peer name patch1])
> > +on_exit 'ip link del patch0'
> > +
> > +AT_CHECK([ip link set dev patch0 up])
> > +AT_CHECK([ip link set dev patch1 up])
> > +AT_CHECK([ovs-vsctl add-port br0 patch0])
> > +AT_CHECK([ovs-vsctl add-port br1 patch1])
> > +
> > +
> > +AT_CHECK([ovs-ofctl -O OpenFlow13 add-flows br0 flows0.txt])
> > +AT_CHECK([ovs-ofctl -O OpenFlow13 add-flows br1 flows1.txt])
> > +
> > +NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 10.1.1.2 |
> > FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +NS_CHECK_EXEC([at_ns1], [ping -q -c 3 -i 0.3 -w 2 10.1.1.1 |
> > FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > +
> > +AT_SETUP([layer3 - ping over Bareudp])
> > +OVS_CHECK_MIN_KERNEL(5, 7)
> > +OVS_TRAFFIC_VSWITCHD_START([_ADD_BR([br1])])
> > +ADD_NAMESPACES(at_ns0, at_ns1)
> > +
> > +ADD_VETH(p0, at_ns0, br0, "10.1.1.1/24", "36:b1:ee:7c:01:01")
> > +ADD_VETH(p1, at_ns1, br1, "10.1.1.2/24", "36:b1:ee:7c:01:02")
> > +
> > +ADD_OVS_TUNNEL([bareudp], [br0], [at_bareudp0], [8.1.1.3],
> > [8.1.1.2/24],
> > +               [ options:local_ip=8.1.1.2
> > options:packet_type="legacy_l3" options:payload_type=ip
> > options:dst_port=6636])
> > +
> > +ADD_OVS_TUNNEL([bareudp], [br1], [at_bareudp1], [8.1.1.2],
> > [8.1.1.3/24],
> > +               [options:local_ip=8.1.1.3
> > options:packet_type="legacy_l3" options:payload_type=ip
> > options:dst_port=6636])
> > +
> > +AT_DATA([flows0.txt], [dnl
> > +table=0,priority=100,dl_type=0x0800 in_port=ovs-p0,
> > actions=output:at_bareudp0
> > +table=0,priority=100,dl_type=0x0800 in_port=at_bareudp0 
> > actions=set_field:36:b1:ee:7c:01:01->dl_dst,set_field:36:b1:ee:7c:01:02->dl_src,output:ovs-p0
> > +table=0,priority=10 actions=normal
> > +])
> > +
> > +AT_DATA([flows1.txt], [dnl
> > +table=0,priority=100,dl_type=0x0800 in_port=ovs-p1
> > actions=output:at_bareudp1
> > +table=0,priority=100,dl_type=0x0800 in_port=at_bareudp1 
> > actions=set_field:36:b1:ee:7c:01:02->dl_dst,set_field:36:b1:ee:7c:01:01->dl_src,output:ovs-p1
> > +table=0,priority=10 actions=normal
> > +])
> > +
> > +AT_CHECK([ip link add patch0 type veth peer name patch1])
> > +on_exit 'ip link del patch0'
> > +
> > +AT_CHECK([ip link set dev patch0 up])
> > +AT_CHECK([ip link set dev patch1 up])
> > +AT_CHECK([ovs-vsctl add-port br0 patch0])
> > +AT_CHECK([ovs-vsctl add-port br1 patch1])
> > +
> > +
> > +AT_CHECK([ovs-ofctl -O OpenFlow13 add-flows br0 flows0.txt])
> > +AT_CHECK([ovs-ofctl -O OpenFlow13 add-flows br1 flows1.txt])
> > +
> > +NS_CHECK_EXEC([at_ns0], [ping -q -c 3 -i 0.3 -w 2 10.1.1.2 |
> > FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +
> > +NS_CHECK_EXEC([at_ns1], [ping -q -c 3 -i 0.3 -w 2 10.1.1.1 |
> > FORMAT_PING], [0], [dnl
> > +3 packets transmitted, 3 received, 0% packet loss, time 0ms
> > +])
> > +OVS_TRAFFIC_VSWITCHD_STOP
> > +AT_CLEANUP
> > diff --git a/vswitchd/vswitch.xml b/vswitchd/vswitch.xml
> > index 89a876796..75cc4263a 100644
> > --- a/vswitchd/vswitch.xml
> > +++ b/vswitchd/vswitch.xml
> > @@ -2694,6 +2694,15 @@
> >              </p>
> >            </dd>
> > 
> > +          <dt><code>Bareudp</code></dt>
> > +          <dd>
> > +            <p>
> > +            The Bareudp tunnel provides a generic L3 encapsulation
> > support for
> > +            tunnelling different L3 protocols like MPLS, IP, NSH etc.
> > inside a
> > +            UDP tunnel.
> > +            </p>
> > +          </dd>
> > +
> >          </dl>
> >        </column>
> >      </group>
> > @@ -3092,6 +3101,17 @@
> >        </column>
> >      </group>
> > 
> > +    <group title="Tunnel Options: Bareudp only">
> > +      <column name="options" key="payload_type">
> > +        <p>
> > +           Specifies the ethertype of the l3 protocol the bareudp
> > +           device is tunnelling. For the tunnels which supports
> > multiple
> > +           ethertypes of a l3 protocol (IP, MPLS) this field specifies
> > the
> > +           protocol name as a string.
> > +        </p>
> > +      </column>
> > +    </group>
> > +
> >      <group title="Patch Options">
> >        <p>
> >          These options apply only to <dfn>patch ports</dfn>, that is,
> > interfaces
> 
> The tunnel option group text needs updating as [in_|_out_]key options do not
> apply to bareudp.
Yes i will add a note
> Also, the individual global options that do not apply to bareudp might need
> a note.
Except the key option i see every options in the sections
Tunnels options & Tunnel options for gre,vlan,geneve is applicable for
bareudp also. Do you see anything obvious ?

I will add bareudp along vxlan,geneve etc in places relevant.

Thanks,
Martin

> 
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