When OVN is linked with an appropriate plugging implementation,
CMS can request OVN to plug individual lports into the local
Open vSwitch instance.

The port and instance record will be maintained during the lifetime
of the lport and it will be removed on release of lport.

Signed-off-by: Frode Nordahl <frode.nord...@canonical.com>
---
 controller/binding.c    | 247 ++++++++++++++++++++++++++++++++++++++--
 tests/ovn-controller.at |  31 +++++
 tests/ovn-macros.at     |   2 +-
 3 files changed, 272 insertions(+), 8 deletions(-)

diff --git a/controller/binding.c b/controller/binding.c
index 938e1d81d..ae67ee3fc 100644
--- a/controller/binding.c
+++ b/controller/binding.c
@@ -35,7 +35,9 @@
 #include "local_data.h"
 #include "lport.h"
 #include "ovn-controller.h"
+#include "ovsport.h"
 #include "patch.h"
+#include "plug.h"
 
 VLOG_DEFINE_THIS_MODULE(binding);
 
@@ -45,6 +47,8 @@ VLOG_DEFINE_THIS_MODULE(binding);
  */
 #define OVN_INSTALLED_EXT_ID "ovn-installed"
 
+#define OVN_PLUGGED_EXT_ID "ovn-plugged"
+
 #define OVN_QOS_TYPE "linux-htb"
 
 struct qos_queue {
@@ -71,10 +75,13 @@ binding_register_ovs_idl(struct ovsdb_idl *ovs_idl)
 
     ovsdb_idl_add_table(ovs_idl, &ovsrec_table_interface);
     ovsdb_idl_track_add_column(ovs_idl, &ovsrec_interface_col_name);
+    ovsdb_idl_track_add_column(ovs_idl, &ovsrec_interface_col_type);
     ovsdb_idl_track_add_column(ovs_idl, &ovsrec_interface_col_external_ids);
     ovsdb_idl_track_add_column(ovs_idl, &ovsrec_interface_col_bfd);
     ovsdb_idl_track_add_column(ovs_idl, &ovsrec_interface_col_bfd_status);
     ovsdb_idl_track_add_column(ovs_idl, &ovsrec_interface_col_status);
+    ovsdb_idl_track_add_column(ovs_idl, &ovsrec_interface_col_options);
+    ovsdb_idl_track_add_column(ovs_idl, &ovsrec_interface_col_mtu_request);
 
     ovsdb_idl_add_table(ovs_idl, &ovsrec_table_qos);
     ovsdb_idl_add_column(ovs_idl, &ovsrec_qos_col_type);
@@ -1090,6 +1097,51 @@ release_binding_lport(const struct sbrec_chassis 
*chassis_rec,
     return true;
 }
 
+static void
+consider_unplug_lport(const struct sbrec_port_binding *pb,
+                      struct binding_ctx_in *b_ctx_in,
+                      struct local_binding *lbinding)
+{
+    const char *plug_type = NULL;
+    if (lbinding && lbinding->iface) {
+        plug_type = smap_get(&lbinding->iface->external_ids,
+                             OVN_PLUGGED_EXT_ID);
+    }
+
+    if (plug_type) {
+        const struct ovsrec_port *port = ovsport_lookup_by_interface(
+                b_ctx_in->ovsrec_port_by_interfaces,
+                (struct ovsrec_interface *) lbinding->iface);
+        if (port) {
+            const struct plug_class *plug;
+            if (!(plug = plug_get_provider(plug_type))) {
+                static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1);
+                VLOG_WARN_RL(&rl,
+                             "Unable to open plug provider for "
+                             "plug-type: '%s' lport %s",
+                             plug_type, pb->logical_port);
+                return;
+            }
+            const struct plug_port_ctx_in plug_ctx_in = {
+                    .op_type = PLUG_OP_REMOVE,
+                    .ovs_table = b_ctx_in->ovs_table,
+                    .br_int = b_ctx_in->br_int,
+                    .lport_name = (const char *)pb->logical_port,
+                    .lport_options = (const struct smap *)&pb->options,
+                    .iface_name = lbinding->iface->name,
+                    .iface_type = lbinding->iface->type,
+                    .iface_options = &lbinding->iface->options,
+            };
+            plug_port_prepare(plug, &plug_ctx_in, NULL);
+            VLOG_INFO("Unplugging port %s from %s for lport %s on this "
+                      "chassis.",
+                      port->name, b_ctx_in->br_int->name, pb->logical_port);
+            ovsport_remove(b_ctx_in->br_int, port);
+            plug_port_finish(plug, &plug_ctx_in, NULL);
+        }
+    }
+}
+
 static bool
 consider_vif_lport_(const struct sbrec_port_binding *pb,
                     bool can_bind,
@@ -1141,15 +1193,184 @@ consider_vif_lport_(const struct sbrec_port_binding 
*pb,
     if (pb->chassis == b_ctx_in->chassis_rec) {
         /* Release the lport if there is no lbinding. */
         if (!lbinding_set || !can_bind) {
-            return release_lport(pb, !b_ctx_in->ovnsb_idl_txn,
-                                 b_ctx_out->tracked_dp_bindings,
-                                 b_ctx_out->if_mgr);
+            bool handled = release_lport(pb, !b_ctx_in->ovnsb_idl_txn,
+                                         b_ctx_out->tracked_dp_bindings,
+                                         b_ctx_out->if_mgr);
+            if (handled && b_lport && b_lport->lbinding) {
+                consider_unplug_lport(pb, b_ctx_in, b_lport->lbinding);
+            }
+            return handled;
         }
     }
 
     return true;
 }
 
+static int64_t
+get_plug_mtu_request(const struct smap *lport_options)
+{
+    return smap_get_int(lport_options, "plug-mtu-request", 0);
+}
+
+static bool
+consider_plug_lport_create__(const struct plug_class *plug,
+                             const struct smap *iface_external_ids,
+                             const struct sbrec_port_binding *pb,
+                             struct binding_ctx_in *b_ctx_in)
+{
+    if (!b_ctx_in->chassis_rec || !b_ctx_in->br_int || !b_ctx_in->ovs_idl_txn)
+    {
+        /* Some of our prerequisites are not available, ask for a recompute. */
+        return false;
+    }
+
+    bool ret = true;
+    struct plug_port_ctx_in plug_ctx_in = {
+            .op_type = PLUG_OP_CREATE,
+            .ovs_table = b_ctx_in->ovs_table,
+            .br_int = b_ctx_in->br_int,
+            .lport_name = (const char *)pb->logical_port,
+            .lport_options = (const struct smap *)&pb->options,
+    };
+    struct plug_port_ctx_out plug_ctx_out;
+
+    if (!plug_port_prepare(plug, &plug_ctx_in, &plug_ctx_out)) {
+        static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1);
+        VLOG_INFO_RL(&rl,
+                     "Not plugging lport %s on direction from plugging "
+                     "library.",
+                     pb->logical_port);
+        ret = false;
+        goto out;
+    }
+
+    VLOG_INFO("Plugging port %s into %s for lport %s on this "
+              "chassis.",
+              plug_ctx_out.name, b_ctx_in->br_int->name,
+              pb->logical_port);
+    ovsport_create(b_ctx_in->ovs_idl_txn, b_ctx_in->br_int,
+                   plug_ctx_out.name, plug_ctx_out.type,
+                   NULL, iface_external_ids,
+                   plug_ctx_out.iface_options,
+                   get_plug_mtu_request(&pb->options));
+
+    plug_port_finish(plug, &plug_ctx_in, &plug_ctx_out);
+
+out:
+    plug_port_ctx_destroy(plug, &plug_ctx_in, &plug_ctx_out);
+
+    return ret;
+}
+
+static bool
+consider_plug_lport_update__(const struct plug_class *plug,
+                             const struct smap *iface_external_ids,
+                             const struct sbrec_port_binding *pb,
+                             struct binding_ctx_in *b_ctx_in,
+                             struct local_binding *lbinding)
+{
+    if (!b_ctx_in->chassis_rec || !b_ctx_in->br_int || !b_ctx_in->ovs_idl_txn)
+    {
+        /* Some of our prerequisites are not available, ask for a recompute. */
+        return false;
+    }
+
+    bool ret = true;
+    struct plug_port_ctx_in plug_ctx_in = {
+            .op_type = PLUG_OP_CREATE,
+            .ovs_table = b_ctx_in->ovs_table,
+            .br_int = b_ctx_in->br_int,
+            .lport_name = (const char *)pb->logical_port,
+            .lport_options = (const struct smap *)&pb->options,
+            .iface_name = lbinding->iface->name,
+            .iface_type = lbinding->iface->type,
+            .iface_options = &lbinding->iface->options,
+    };
+    struct plug_port_ctx_out plug_ctx_out;
+
+    if (!plug_port_prepare(plug, &plug_ctx_in, &plug_ctx_out)) {
+        static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1);
+        VLOG_INFO_RL(&rl,
+                     "Not updating lport %s on direction from plugging "
+                     "library.",
+                     pb->logical_port);
+        ret = false;
+        goto out;
+    }
+
+    if (strcmp(lbinding->iface->name, plug_ctx_out.name)) {
+        VLOG_WARN("Attempt of incompatible change to existing "
+                  "port detected, please recreate port: %s",
+                   pb->logical_port);
+        ret = false;
+        goto out;
+    }
+    VLOG_DBG("updating iface for: %s", pb->logical_port);
+    ovsport_update_iface(lbinding->iface, plug_ctx_out.type,
+                         iface_external_ids,
+                         NULL,
+                         plug_ctx_out.iface_options,
+                         plug_get_maintained_iface_options(plug),
+                         get_plug_mtu_request(&pb->options));
+
+    plug_port_finish(plug, &plug_ctx_in, &plug_ctx_out);
+out:
+    plug_port_ctx_destroy(plug, &plug_ctx_in, &plug_ctx_out);
+
+    return ret;
+}
+
+static bool
+consider_plug_lport(const struct sbrec_port_binding *pb,
+                    struct binding_ctx_in *b_ctx_in,
+                    struct local_binding *lbinding)
+{
+    bool ret = true;
+    if (can_bind_on_this_chassis(b_ctx_in->chassis_rec, pb)) {
+        const char *plug_type = smap_get(&pb->options, "plug-type");
+        if (!plug_type) {
+            /* Nothing for us to do and we don't need a recompute. */
+            return true;
+        }
+
+        static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1);
+        const struct plug_class *plug;
+        if (!(plug = plug_get_provider(plug_type))) {
+            VLOG_WARN_RL(&rl,
+                         "Unable to open plug provider for plug-type: '%s' "
+                         "lport %s",
+                         plug_type, pb->logical_port);
+            /* While we are unable to handle this, asking for a recompute will
+             * not change that fact. */
+            return true;
+        }
+        const struct smap iface_external_ids = SMAP_CONST2(
+                &iface_external_ids,
+                OVN_PLUGGED_EXT_ID, plug_type,
+                "iface-id", pb->logical_port);
+        if (lbinding && lbinding->iface) {
+            if (!smap_get(&lbinding->iface->external_ids,
+                          OVN_PLUGGED_EXT_ID))
+            {
+                VLOG_WARN_RL(&rl,
+                             "CMS requested plugging of lport %s, but a port "
+                             "that is not maintained by OVN already exsist "
+                             "in local vSwitch: "UUID_FMT,
+                             pb->logical_port,
+                             UUID_ARGS(&lbinding->iface->header_.uuid));
+                return false;
+            }
+            ret = consider_plug_lport_update__(plug, &iface_external_ids, pb,
+                                               b_ctx_in, lbinding);
+        } else {
+            ret = consider_plug_lport_create__(plug, &iface_external_ids, pb,
+                                               b_ctx_in);
+        }
+    }
+
+    return ret;
+}
+
 static bool
 consider_vif_lport(const struct sbrec_port_binding *pb,
                    struct binding_ctx_in *b_ctx_in,
@@ -1187,8 +1408,13 @@ consider_vif_lport(const struct sbrec_port_binding *pb,
         }
     }
 
-    return consider_vif_lport_(pb, can_bind, b_ctx_in, b_ctx_out,
-                               b_lport, qos_map);
+    /* Consider if we should create or update local port/interface record for
+     * this lport.  Note that a newly created port/interface will get its flows
+     * installed on the next loop iteration as we won't wait for OVS vSwitchd
+     * to configure and assign a ofport to the interface. */
+    return consider_plug_lport(pb, b_ctx_in, lbinding)
+           & consider_vif_lport_(pb, can_bind, b_ctx_in, b_ctx_out,
+                                 b_lport, qos_map);
 }
 
 static bool
@@ -2111,8 +2337,11 @@ handle_deleted_vif_lport(const struct sbrec_port_binding 
*pb,
         lbinding = b_lport->lbinding;
         bound = is_binding_lport_this_chassis(b_lport, b_ctx_in->chassis_rec);
 
-         /* Remove b_lport from local_binding. */
-         binding_lport_delete(binding_lports, b_lport);
+        if (b_lport->lbinding) {
+            consider_unplug_lport(pb, b_ctx_in, b_lport->lbinding);
+        }
+        /* Remove b_lport from local_binding. */
+        binding_lport_delete(binding_lports, b_lport);
     }
 
     if (bound && lbinding && lport_type == LP_VIF) {
@@ -2690,6 +2919,10 @@ local_binding_handle_stale_binding_lports(struct 
local_binding *lbinding,
             handled = release_binding_lport(b_ctx_in->chassis_rec, b_lport,
                                             !b_ctx_in->ovnsb_idl_txn,
                                             b_ctx_out);
+            if (handled && b_lport && b_lport->lbinding) {
+                consider_unplug_lport(b_lport->pb, b_ctx_in,
+                                      b_lport->lbinding);
+            }
             binding_lport_delete(&b_ctx_out->lbinding_data->lports,
                                  b_lport);
         }
diff --git a/tests/ovn-controller.at b/tests/ovn-controller.at
index 4ae218ed6..a38884374 100644
--- a/tests/ovn-controller.at
+++ b/tests/ovn-controller.at
@@ -723,3 +723,34 @@ AT_CHECK([as hv1 ovs-ofctl dump-flows br-int | grep 
controller | grep userdata=0
 OVN_CLEANUP([hv1])
 AT_CLEANUP
 ])
+
+OVN_FOR_EACH_NORTHD([
+AT_SETUP([ovn-controller - plugging])
+AT_KEYWORDS([plugging])
+
+ovn_start
+
+net_add n1
+sim_add hv1
+ovs-vsctl add-br br-phys
+ovn_attach n1 br-phys 192.168.0.1
+
+check ovn-nbctl ls-add lsw0
+check ovn-nbctl lsp-add lsw0 lsp1
+check ovn-nbctl lsp-set-addresses lsp1 "f0:00:00:00:00:01 172.16.0.100"
+check ovn-nbctl --wait=sb set Logical_Switch_Port lsp1 \
+    options:requested-chassis=hv1 \
+    options:plug-type=dummy \
+    options:plug-mtu-request=42
+
+wait_column "true" Port_Binding up logical_port=lsp1
+
+as hv1
+
+AT_CHECK([as hv1 ovs-vsctl find interface name=lsp1 
options:plug-dummy-option=value | grep -q "options.*value"])
+AT_CHECK([as hv1 ovs-vsctl find interface name=lsp1 mtu_request=42 | grep -q 
"mtu_request.*42"])
+
+OVN_CLEANUP([hv1])
+AT_CLEANUP
+])
+
diff --git a/tests/ovn-macros.at b/tests/ovn-macros.at
index f06f2e68e..b3c2d72fa 100644
--- a/tests/ovn-macros.at
+++ b/tests/ovn-macros.at
@@ -327,7 +327,7 @@ ovn_az_attach() {
         -- --may-exist add-br br-int \
         -- set bridge br-int fail-mode=secure 
other-config:disable-in-band=true \
         || return 1
-    start_daemon ovn-controller || return 1
+    start_daemon ovn-controller --enable-dummy-plug || return 1
 }
 
 # ovn_attach NETWORK BRIDGE IP [MASKLEN]
-- 
2.32.0

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