On Mon, Feb 03, 2025 at 02:33:07PM +0100, Dumitru Ceara wrote:
> On 1/29/25 12:15 PM, Felix Huettner via dev wrote:
> > We now learn all routes inside the vrfs we also advertise routes on.
> > The routes are then placed in the southbound database for processing by
> > northd.
> >
> > Routes are only selected if matching the following rules:
> > 1. must not be a route advertised by us
> > 2. must not be a local connected route (as we want to not learn transfer
> > networks)
> > 3. the prefix must not be a link local address
> >
> > However we can not reliably determine over which link we learned the
> > route in case we have two LRPs of the same LR on the same chassis.
> > For now we just assume the routes on both links are identical.
> > Future commits will refine this.
> >
> > Signed-off-by: Felix Huettner <[email protected]>
> > ---
>
> Hi Felix,
>
> I have a few more (mostly minor) comments on this version.
Hi Dumitru,
thanks for the review.
The smaller things are addressed in the next version.
>
> > v3->v4:
> > - addressed review comments.
> > v2->v3:
> > * Set monitor conditions on sb Learned_Route table.
> > * Do not learn routes if Learned_Route table does not exist (upgrades).
> >
> > controller/ovn-controller.c | 64 +++++++++++--
> > controller/route-exchange-netlink.c | 38 +++++++-
> > controller/route-exchange-netlink.h | 15 ++-
> > controller/route-exchange.c | 138 +++++++++++++++++++++++++++-
> > controller/route-exchange.h | 3 +
> > lib/ovn-util.c | 10 ++
> > lib/ovn-util.h | 1 +
> > tests/system-ovn.at | 21 +++++
> > 8 files changed, 277 insertions(+), 13 deletions(-)
> >
> > diff --git a/controller/ovn-controller.c b/controller/ovn-controller.c
> > index 1eb8d39d1..5b31f6fd2 100644
> > --- a/controller/ovn-controller.c
> > +++ b/controller/ovn-controller.c
> > @@ -233,7 +233,7 @@ update_sb_monitors(struct ovsdb_idl *ovnsb_idl,
> > *
> > * Monitor Template_Var for local chassis.
> > *
> > - * Monitor Advertised_Route for local datapaths.
> > + * Monitor Advertised/Learned_Route for local datapaths.
> > *
> > * We always monitor patch ports because they allow us to see the
> > linkages
> > * between related logical datapaths. That way, when we know that we
> > have
> > @@ -252,6 +252,7 @@ update_sb_monitors(struct ovsdb_idl *ovnsb_idl,
> > struct ovsdb_idl_condition chprv = OVSDB_IDL_CONDITION_INIT(&chprv);
> > struct ovsdb_idl_condition tv = OVSDB_IDL_CONDITION_INIT(&tv);
> > struct ovsdb_idl_condition ar = OVSDB_IDL_CONDITION_INIT(&ar);
> > + struct ovsdb_idl_condition lr = OVSDB_IDL_CONDITION_INIT(&lr);
> >
> > /* Always monitor all logical datapath groups. Otherwise, DPG updates
> > may
> > * be received *after* the lflows using it are seen by ovn-controller.
> > @@ -277,6 +278,7 @@ update_sb_monitors(struct ovsdb_idl *ovnsb_idl,
> > ovsdb_idl_condition_add_clause_true(&chprv);
> > ovsdb_idl_condition_add_clause_true(&tv);
> > ovsdb_idl_condition_add_clause_true(&ar);
> > + ovsdb_idl_condition_add_clause_true(&lr);
>
> Same comment as for advertised routes in the previous patch. We might
> be able to move this under if (!chassis) {...}.
>
> > goto out;
> > }
> >
> > @@ -365,7 +367,6 @@ update_sb_monitors(struct ovsdb_idl *ovnsb_idl,
> > sbrec_dns_add_clause_datapaths(&dns, OVSDB_F_INCLUDES, &uuid,
> > 1);
> > sbrec_ip_multicast_add_clause_datapath(&ip_mcast, OVSDB_F_EQ,
> > uuid);
> > - sbrec_advertised_route_add_clause_datapath(&ar, OVSDB_F_EQ,
> > uuid);
> > }
> >
> > /* Datapath groups are immutable, which means a new group record is
> > @@ -379,6 +380,14 @@ update_sb_monitors(struct ovsdb_idl *ovnsb_idl,
> > sbrec_logical_flow_add_clause_logical_dp_group(&lf, OVSDB_F_NE,
> > NULL);
> > }
> >
> > + /* When the ports are getting bound to the chassis e.g incase of
> > + * restart, at that moment we don't have the local datapaths, to avoid
> > + * removing the existing advertised routes from the vrf or removing
> > + * learned routes to the SB, we set condition to monitor all.
> > + */
> > + ovsdb_idl_condition_add_clause_true(&ar);
> > + ovsdb_idl_condition_add_clause_true(&lr);
> > +
> > out:;
> > unsigned int cond_seqnos[] = {
> > sb_table_set_req_mon_condition(ovnsb_idl, port_binding, &pb),
> > @@ -394,6 +403,7 @@ out:;
> > sb_table_set_req_mon_condition(ovnsb_idl, chassis_private, &chprv),
> > sb_table_set_opt_mon_condition(ovnsb_idl, chassis_template_var,
> > &tv),
> > sb_table_set_opt_mon_condition(ovnsb_idl, advertised_route, &ar),
> > + sb_table_set_opt_mon_condition(ovnsb_idl, learned_route, &lr),
> > };
> >
> > unsigned int expected_cond_seqno = 0;
> > @@ -414,6 +424,7 @@ out:;
> > ovsdb_idl_condition_destroy(&chprv);
> > ovsdb_idl_condition_destroy(&tv);
> > ovsdb_idl_condition_destroy(&ar);
> > + ovsdb_idl_condition_destroy(&lr);
> > return expected_cond_seqno;
> > }
> >
> > @@ -880,7 +891,8 @@ ctrl_register_ovs_idl(struct ovsdb_idl *ovs_idl)
> > SB_NODE(meter, "meter") \
> > SB_NODE(static_mac_binding, "static_mac_binding") \
> > SB_NODE(chassis_template_var, "chassis_template_var") \
> > - SB_NODE(advertised_route, "advertised_route")
> > + SB_NODE(advertised_route, "advertised_route") \
> > + SB_NODE(learned_route, "learned_route")
> >
> > enum sb_engine_node {
> > #define SB_NODE(NAME, NAME_STR) SB_##NAME,
> > @@ -5001,13 +5013,40 @@ route_sb_advertised_route_data_handler(struct
> > engine_node *node, void *data)
> > return true;
> > }
> >
> > +struct ed_type_route_exchange {
> > + /* We need the idl to check if a table exists. */
> > + struct ovsdb_idl *sb_idl;
> > +};
> > +
> > static void
> > -en_route_exchange_run(struct engine_node *node, void *data OVS_UNUSED)
> > +en_route_exchange_run(struct engine_node *node, void *data)
> > {
> > + struct ed_type_route_exchange *re = data;
> > +
> > + struct ovsdb_idl_index *sbrec_learned_route_by_datapath =
> > + engine_ovsdb_node_get_index(
> > + engine_get_input("SB_learned_route", node),
> > + "datapath");
> > +
> > + struct ovsdb_idl_index *sbrec_port_binding_by_name =
> > + engine_ovsdb_node_get_index(
> > + engine_get_input("SB_port_binding", node),
> > + "name");
> > +
> > struct ed_type_route *route_data =
> > engine_get_input_data("route", node);
> >
> > + /* There can not actually be any routes to advertise unless we also
> > have
> > + * the Learned_Route table, since they where introduced in the same
> > + * release. */
> > + if (!sbrec_server_has_learned_route_table(re->sb_idl)) {
> > + return;
> > + }
> > +
> > struct route_exchange_ctx_in r_ctx_in = {
> > + .ovnsb_idl_txn = engine_get_context()->ovnsb_idl_txn,
> > + .sbrec_learned_route_by_datapath = sbrec_learned_route_by_datapath,
> > + .sbrec_port_binding_by_name = sbrec_port_binding_by_name,
> > .announce_routes = &route_data->announce_routes,
> > };
> >
> > @@ -5022,9 +5061,11 @@ en_route_exchange_run(struct engine_node *node, void
> > *data OVS_UNUSED)
> >
> > static void *
> > en_route_exchange_init(struct engine_node *node OVS_UNUSED,
> > - struct engine_arg *arg OVS_UNUSED)
> > + struct engine_arg *arg)
> > {
> > - return NULL;
> > + struct ed_type_route_exchange *re = xzalloc(sizeof(*re));
> > + re->sb_idl = arg->sb_idl;
> > + return re;
> > }
> >
> > static void
> > @@ -5239,6 +5280,9 @@ main(int argc, char *argv[])
> > struct ovsdb_idl_index *sbrec_chassis_template_var_index_by_chassis
> > = ovsdb_idl_index_create1(ovnsb_idl_loop.idl,
> > &sbrec_chassis_template_var_col_chassis);
> > + struct ovsdb_idl_index *sbrec_learned_route_index_by_datapath
> > + = ovsdb_idl_index_create1(ovnsb_idl_loop.idl,
> > + &sbrec_learned_route_col_datapath);
> >
> > ovsdb_idl_track_add_all(ovnsb_idl_loop.idl);
> > ovsdb_idl_omit_alert(ovnsb_idl_loop.idl,
> > @@ -5265,6 +5309,8 @@ main(int argc, char *argv[])
> > &sbrec_ha_chassis_group_col_external_ids);
> > ovsdb_idl_omit(ovnsb_idl_loop.idl,
> > &sbrec_advertised_route_col_external_ids);
> > + ovsdb_idl_omit(ovnsb_idl_loop.idl,
> > + &sbrec_learned_route_col_external_ids);
> >
> > /* We don't want to monitor Connection table at all. So omit all the
> > * columns. */
> > @@ -5358,6 +5404,10 @@ main(int argc, char *argv[])
> > route_sb_advertised_route_data_handler);
> >
> > engine_add_input(&en_route_exchange, &en_route, NULL);
> > + engine_add_input(&en_route_exchange, &en_sb_learned_route,
> > + engine_noop_handler);
> > + engine_add_input(&en_route_exchange, &en_sb_port_binding,
> > + engine_noop_handler);
> >
> > engine_add_input(&en_addr_sets, &en_sb_address_set,
> > addr_sets_sb_address_set_handler);
> > @@ -5576,6 +5626,8 @@ main(int argc, char *argv[])
> > sbrec_static_mac_binding_by_datapath);
> > engine_ovsdb_node_add_index(&en_sb_chassis_template_var, "chassis",
> >
> > sbrec_chassis_template_var_index_by_chassis);
> > + engine_ovsdb_node_add_index(&en_sb_learned_route, "datapath",
> > + sbrec_learned_route_index_by_datapath);
> > engine_ovsdb_node_add_index(&en_ovs_flow_sample_collector_set, "id",
> > ovsrec_flow_sample_collector_set_by_id);
> > engine_ovsdb_node_add_index(&en_ovs_port, "qos", ovsrec_port_by_qos);
> > diff --git a/controller/route-exchange-netlink.c
> > b/controller/route-exchange-netlink.c
> > index 4ba21ecaa..74741a3fd 100644
> > --- a/controller/route-exchange-netlink.c
> > +++ b/controller/route-exchange-netlink.c
> > @@ -196,8 +196,19 @@ re_nl_delete_route(uint32_t table_id, const struct
> > in6_addr *dst,
> > return modify_route(RTM_DELROUTE, 0, table_id, dst, plen);
> > }
> >
> > +void
> > +re_nl_learned_routes_destroy(struct ovs_list *learned_routes)
> > +{
> > + struct re_nl_received_route_node *rr;
> > + LIST_FOR_EACH_POP (rr, list_node, learned_routes) {
> > + free(rr);
> > + }
> > +}
> > +
> > struct route_msg_handle_data {
> > struct hmapx *routes_to_advertise;
> > + struct ovs_list *learned_routes;
> > + const struct sbrec_datapath_binding *db;
>
> Nit: this would become reverse xmas tree if we move the 'db' field at
> the top. It also kind of makes sense because it's per datapath binding.
>
> > };
> >
> > static void
> > @@ -208,8 +219,25 @@ handle_route_msg(const struct route_table_msg *msg,
> > void *data)
> > struct advertise_route_entry *ar;
> > int err;
> >
> > - /* This route is not from us, we should not touch it. */
> > + /* This route is not from us, so we learn it. */
> > if (rd->rtm_protocol != RTPROT_OVN) {
> > + if (prefix_is_link_local(&rd->rta_dst, rd->rtm_dst_len)) {
> > + return;
> > + }
> > + struct route_data_nexthop *nexthop;
> > + LIST_FOR_EACH (nexthop, nexthop_node, &rd->nexthops) {
> > + if (ipv6_is_zero(&nexthop->addr)) {
> > + /* This is most likely an address on the local link.
> > + * As we just want to learn remote routes we do not need
> > it.*/
> > + continue;
> > + }
> > + struct re_nl_received_route_node *rr = xzalloc(sizeof *rr);
>
> Nit: xmalloc() is good enough.
>
> > + ovs_list_push_back(handle_data->learned_routes,
> > &rr->list_node);
>
> Nit: I'd push this to the list after it is fully initialized.
>
> > + rr->db = handle_data->db;
> > + rr->addr = rd->rta_dst;
> > + rr->plen = rd->rtm_dst_len;
> > + rr->nexthop = nexthop->addr;
> > + }
> > return;
> > }
> >
> > @@ -236,7 +264,9 @@ handle_route_msg(const struct route_table_msg *msg,
> > void *data)
> > }
> >
> > void
> > -re_nl_sync_routes(uint32_t table_id, const struct hmap *routes)
> > +re_nl_sync_routes(uint32_t table_id, const struct hmap *routes,
> > + struct ovs_list *learned_routes,
> > + const struct sbrec_datapath_binding *db)
> > {
> > struct hmapx routes_to_advertise =
> > HMAPX_INITIALIZER(&routes_to_advertise);
> > struct advertise_route_entry *ar;
> > @@ -249,11 +279,13 @@ re_nl_sync_routes(uint32_t table_id, const struct
> > hmap *routes)
> > * in the system. */
> > struct route_msg_handle_data data = {
> > .routes_to_advertise = &routes_to_advertise,
> > + .learned_routes = learned_routes,
> > + .db = db,
> > };
> > route_table_dump_one_table(table_id, handle_route_msg,
> > &data);
> >
> > - /* Add any remaining routes in the host_routes hmap to the system
> > routing
> > + /* Add any remaining routes in the routes hmap to the system routing
> > * table. */
> > struct hmapx_node *hn;
> > HMAPX_FOR_EACH (hn, &routes_to_advertise) {
> > diff --git a/controller/route-exchange-netlink.h
> > b/controller/route-exchange-netlink.h
> > index 93b593ad2..bc77504ae 100644
> > --- a/controller/route-exchange-netlink.h
> > +++ b/controller/route-exchange-netlink.h
> > @@ -19,6 +19,8 @@
> > #define ROUTE_EXCHANGE_NETLINK_H 1
> >
> > #include <stdint.h>
> > +#include "openvswitch/list.h"
> > +#include <netinet/in.h>
> >
> > /* This value is arbitrary but currently unused.
> > * See
> > https://github.com/iproute2/iproute2/blob/main/etc/iproute2/rt_protos */
> > @@ -27,6 +29,14 @@
> > struct in6_addr;
> > struct hmap;
> >
> > +struct re_nl_received_route_node {
> > + struct ovs_list list_node;
> > + const struct sbrec_datapath_binding *db;
>
> Nit: I think it might look "slightly better" if we move this field one
> line above.
>
> > + struct in6_addr addr;
>
> Nit: maybe 'prefix' is more descriptive?
>
> > + unsigned int plen;
> > + struct in6_addr nexthop;
> > +};
> > +
> > int re_nl_create_vrf(const char *ifname, uint32_t table_id);
> > int re_nl_delete_vrf(const char *ifname);
> >
> > @@ -37,6 +47,9 @@ int re_nl_delete_route(uint32_t table_id, const struct
> > in6_addr *dst,
> >
> > void re_nl_dump(uint32_t table_id);
> >
> > -void re_nl_sync_routes(uint32_t table_id, const struct hmap *routes);
> > +void re_nl_learned_routes_destroy(struct ovs_list *learned_routes);
> > +void re_nl_sync_routes(uint32_t table_id, const struct hmap *routes,
> > + struct ovs_list *learned_routes,
> > + const struct sbrec_datapath_binding *db);
> >
> > #endif /* route-exchange-netlink.h */
> > diff --git a/controller/route-exchange.c b/controller/route-exchange.c
> > index 0942780e2..a163968a7 100644
> > --- a/controller/route-exchange.c
> > +++ b/controller/route-exchange.c
> > @@ -21,6 +21,7 @@
> > #include <net/if.h>
> >
> > #include "openvswitch/vlog.h"
> > +#include "openvswitch/list.h"
> >
> > #include "lib/ovn-sb-idl.h"
> >
> > @@ -37,6 +38,127 @@ static struct vlog_rate_limit rl =
> > VLOG_RATE_LIMIT_INIT(5, 20);
> >
> > static struct sset _maintained_vrfs = SSET_INITIALIZER(&_maintained_vrfs);
> >
> > +struct route_entry {
> > + struct hmap_node hmap_node;
> > +
> > + const struct sbrec_learned_route *sb_route;
> > +};
> > +
> > +static struct route_entry *
>
> We never use the return value, we might as well make this "void".
>
> > +route_alloc_entry(struct hmap *routes,
>
> route_insert_entry() or route_add_entry() would be more accurate. In
> sb_sync_learned_routes() we end a loop iteration with:
>
> route_e = route_alloc_entry(&sync_routes, sb_route);
> }
>
> Which made me wonder if we leak memory. We don't because
> route_alloc_entry() inserts into the routes map too.
>
> > + const struct sbrec_learned_route *sb_route)
> > +{
> > + struct route_entry *route_e = xzalloc(sizeof *route_e);
>
> Nit: xmalloc() is fine here.
>
> > +
> > + route_e->sb_route = sb_route;
>
> Nit: I'd move the newline from the line above here.
>
> > + uint32_t hash = uuid_hash(&sb_route->datapath->header_.uuid);
> > + hash = hash_string(sb_route->logical_port->logical_port, hash);
> > + hash = hash_string(sb_route->ip_prefix, hash);
> > + hmap_insert(routes, &route_e->hmap_node, hash);
> > +
> > + return route_e;
> > +}
> > +
> > +static struct route_entry *
> > +route_lookup(struct hmap *route_map,
> > + const struct sbrec_datapath_binding *sb_db,
> > + const struct sbrec_port_binding *logical_port,
> > + const char *ip_prefix, const char *nexthop)
> > +{
> > + struct route_entry *route_e;
> > + uint32_t hash;
> > +
> > + hash = uuid_hash(&sb_db->header_.uuid);
> > + hash = hash_string(logical_port->logical_port, hash);
> > + hash = hash_string(ip_prefix, hash);
> > + HMAP_FOR_EACH_WITH_HASH (route_e, hmap_node, hash, route_map) {
> > + if (route_e->sb_route->datapath != sb_db) {
> > + continue;
> > + }
> > +
> > + if (route_e->sb_route->logical_port != logical_port) {
> > + continue;
> > + }
> > +
> > + if (strcmp(route_e->sb_route->ip_prefix, ip_prefix)) {
> > + continue;
> > + }
> > +
> > + if (strcmp(route_e->sb_route->nexthop, nexthop)) {
> > + continue;
> > + }
> > +
> > + return route_e;
> > + }
> > +
> > + return NULL;
> > +}
> > +
> > +static void
> > +sb_sync_learned_routes(const struct ovs_list *learned_routes,
> > + const struct sbrec_datapath_binding *datapath,
> > + const struct sset *bound_ports,
> > + struct ovsdb_idl_txn *ovnsb_idl_txn,
> > + struct ovsdb_idl_index *sbrec_port_binding_by_name,
> > + struct ovsdb_idl_index
> > *sbrec_learned_route_by_datapath)
> > +{
> > + struct hmap sync_routes = HMAP_INITIALIZER(&sync_routes);
> > + struct route_entry *route_e;
>
> This can be moved inside the second loop below.
It is still used at HMAP_FOR_EACH_POP, so i would leave it here.
The rest will be in the next version.
Thanks a lot,
Felix
>
> > + const struct sbrec_learned_route *sb_route;
> > +
> > + struct sbrec_learned_route *filter =
> > +
> > sbrec_learned_route_index_init_row(sbrec_learned_route_by_datapath);
> > + sbrec_learned_route_index_set_datapath(filter, datapath);
> > + SBREC_LEARNED_ROUTE_FOR_EACH_EQUAL (sb_route, filter,
> > + sbrec_learned_route_by_datapath) {
> > + /* If the port is not local we don't care about it.
> > + * Some other ovn-controller will handle it. */
> > + if (!sset_contains(bound_ports,
> > + sb_route->logical_port->logical_port)) {
> > + continue;
> > + }
> > + route_e = route_alloc_entry(&sync_routes, sb_route);
>
> Unused 'route_e'. As commented above, this is an actual "insert" in the
> hmap.
>
> > + }
> > + sbrec_learned_route_index_destroy_row(filter);
> > +
> > + struct re_nl_received_route_node *learned_route;
> > + LIST_FOR_EACH (learned_route, list_node, learned_routes) {
> > + char *ip_prefix = normalize_v46_prefix(&learned_route->addr,
> > + learned_route->plen);
> > + char *nexthop = normalize_v46(&learned_route->nexthop);
> > +
> > + const char *logical_port_name;
> > + SSET_FOR_EACH (logical_port_name, bound_ports) {
> > + const struct sbrec_port_binding *logical_port =
> > + lport_lookup_by_name(sbrec_port_binding_by_name,
> > + logical_port_name);
> > + if (!logical_port) {
> > + continue;
> > + }
> > + route_e = route_lookup(&sync_routes, datapath,
> > + logical_port, ip_prefix, nexthop);
> > + if (route_e) {
> > + hmap_remove(&sync_routes, &route_e->hmap_node);
> > + free(route_e);
> > + } else {
> > + sb_route = sbrec_learned_route_insert(ovnsb_idl_txn);
> > + sbrec_learned_route_set_datapath(sb_route, datapath);
> > + sbrec_learned_route_set_logical_port(sb_route,
> > logical_port);
> > + sbrec_learned_route_set_ip_prefix(sb_route, ip_prefix);
> > + sbrec_learned_route_set_nexthop(sb_route, nexthop);
> > + }
> > + }
> > + free(ip_prefix);
> > + free(nexthop);
> > + }
> > +
> > + HMAP_FOR_EACH_POP (route_e, hmap_node, &sync_routes) {
> > + sbrec_learned_route_delete(route_e->sb_route);
> > + free(route_e);
> > + }
> > + hmap_destroy(&sync_routes);
> > +}
> > +
> > void
> > route_exchange_run(struct route_exchange_ctx_in *r_ctx_in,
> > struct route_exchange_ctx_out *r_ctx_out OVS_UNUSED)
> > @@ -46,8 +168,6 @@ route_exchange_run(struct route_exchange_ctx_in
> > *r_ctx_in,
> >
> > const struct advertise_datapath_entry *ad;
> > HMAP_FOR_EACH (ad, node, r_ctx_in->announce_routes) {
> > - struct hmap received_routes
> > - = HMAP_INITIALIZER(&received_routes);
> > uint32_t table_id = ad->db->tunnel_key;
> > char vrf_name[IFNAMSIZ + 1];
> > snprintf(vrf_name, sizeof vrf_name, "ovnvrf%"PRIi32, table_id);
> > @@ -72,9 +192,21 @@ route_exchange_run(struct route_exchange_ctx_in
> > *r_ctx_in,
> > sset_find_and_delete(&old_maintained_vrfs, vrf_name);
> > }
> >
> > - re_nl_sync_routes(ad->db->tunnel_key, &ad->routes);
> > + struct ovs_list received_routes = OVS_LIST_INITIALIZER(
> > + &received_routes);
> > +
> > + re_nl_sync_routes(ad->db->tunnel_key, &ad->routes,
> > + &received_routes, ad->db);
> > +
> > + sb_sync_learned_routes(&received_routes, ad->db,
> > + &ad->bound_ports, r_ctx_in->ovnsb_idl_txn,
> > + r_ctx_in->sbrec_port_binding_by_name,
> > + r_ctx_in->sbrec_learned_route_by_datapath);
> > +
> > + re_nl_learned_routes_destroy(&received_routes);
> > }
> >
> > +
>
> Nit: unrelated newline.
>
> > /* Remove VRFs previously maintained by us not found in the above
> > loop. */
> > const char *vrf_name;
> > SSET_FOR_EACH_SAFE (vrf_name, &old_maintained_vrfs) {
> > diff --git a/controller/route-exchange.h b/controller/route-exchange.h
> > index 65520242b..d23bb37a2 100644
> > --- a/controller/route-exchange.h
> > +++ b/controller/route-exchange.h
> > @@ -19,6 +19,9 @@
> > #define ROUTE_EXCHANGE_H 1
> >
> > struct route_exchange_ctx_in {
> > + struct ovsdb_idl_txn *ovnsb_idl_txn;
> > + struct ovsdb_idl_index *sbrec_port_binding_by_name;
> > + struct ovsdb_idl_index *sbrec_learned_route_by_datapath;
> > /* Contains struct advertise_datapath_entry */
> > const struct hmap *announce_routes;
> > };
> > diff --git a/lib/ovn-util.c b/lib/ovn-util.c
> > index ed847517a..507847280 100644
> > --- a/lib/ovn-util.c
> > +++ b/lib/ovn-util.c
> > @@ -822,6 +822,16 @@ normalize_v46_prefix(const struct in6_addr *prefix,
> > unsigned int plen)
> > }
> > }
> >
> > +char *
> > +normalize_v46(const struct in6_addr *prefix)
> > +{
> > + if (IN6_IS_ADDR_V4MAPPED(prefix)) {
> > + return normalize_ipv4_prefix(in6_addr_get_mapped_ipv4(prefix), 32);
> > + } else {
> > + return normalize_ipv6_prefix(prefix, 128);
> > + }
> > +}
> > +
> > char *
> > str_tolower(const char *orig)
> > {
> > diff --git a/lib/ovn-util.h b/lib/ovn-util.h
> > index 31c2c68df..8d8fd989b 100644
> > --- a/lib/ovn-util.h
> > +++ b/lib/ovn-util.h
> > @@ -207,6 +207,7 @@ bool ip46_parse(const char *ip_str, struct in6_addr
> > *ip);
> > char *normalize_ipv4_prefix(ovs_be32 ipv4, unsigned int plen);
> > char *normalize_ipv6_prefix(const struct in6_addr *ipv6, unsigned int
> > plen);
> > char *normalize_v46_prefix(const struct in6_addr *prefix, unsigned int
> > plen);
> > +char *normalize_v46(const struct in6_addr *prefix);
> >
> > /* Returns a lowercase copy of orig.
> > * Caller must free the returned string.
> > diff --git a/tests/system-ovn.at b/tests/system-ovn.at
> > index 760c97a5d..dc99d4c57 100644
> > --- a/tests/system-ovn.at
> > +++ b/tests/system-ovn.at
> > @@ -15048,6 +15048,16 @@ blackhole 192.0.2.3 proto 84
> > blackhole 192.0.2.10 proto 84
> > blackhole 198.51.100.0/24 proto 84])
> >
> > +# Now we test route learning.
> > +check_row_count Learned_Route 0
> > +check ip route add 233.252.0.0/24 via 192.168.10.10 dev lo onlink vrf
> > ovnvrf1337
> > +# For now we trigger a recompute as route watching is not yet implemented.
> > +check ovn-appctl -t ovn-controller inc-engine/recompute
> > +check ovn-nbctl --wait=hv sync
> > +check_row_count Learned_Route 1
> > +lp=$(fetch_column port_binding _uuid logical_port=internet-phys)
> > +check_row_count Learned_Route 1 logical_port=$lp ip_prefix=233.252.0.0/24
> > nexthop=192.168.10.10
> > +
> > OVS_APP_EXIT_AND_WAIT([ovn-controller])
> >
> > as ovn-sb
> > @@ -15209,6 +15219,7 @@ check ovn-nbctl lr-nat-add pr1 dnat_and_snat
> > 192.0.2.10 10.0.0.2
> > check ovn-nbctl lsp-add p2 vif2 \
> > -- lsp-set-addresses vif2 "00:00:ff:ff:ff:02 198.51.100.10"
> > check ovn-nbctl lr-route-add internet 198.51.100.0/24 192.0.2.3
> > + .ovnsb_idl = re->sb_idl,
> >
> > # Configure external connectivity.
> > check ovs-vsctl set Open_vSwitch .
> > external-ids:ovn-bridge-mappings=phynet:br-ext
> > @@ -15251,6 +15262,16 @@ blackhole 192.0.2.3 proto 84
> > blackhole 192.0.2.10 proto 84
> > blackhole 198.51.100.0/24 proto 84])
> >
> > +# Now we test route learning.
> > +check_row_count Learned_Route 0
> > +check ip route add 233.252.0.0/24 via 192.168.10.10 dev lo onlink vrf
> > ovnvrf1337
> > +# For now we trigger a recompute as route watching is not yet implemented.
> > +check ovn-appctl -t ovn-controller inc-engine/recompute
> > +check ovn-nbctl --wait=hv sync
> > +check_row_count Learned_Route 2
> > +lp=$(fetch_column port_binding _uuid logical_port=internet-phys)
> > +check_row_count Learned_Route 1 logical_port=$lp ip_prefix=233.252.0.0/24
> > nexthop=192.168.10.10
> > +
> > as ovn-sb
> > OVS_APP_EXIT_AND_WAIT([ovsdb-server])
> >
>
> Thanks,
> Dumitru
>
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