On 2/4/25 11:04 AM, Felix Huettner wrote:
> On Tue, Feb 04, 2025 at 10:35:25AM +0100, Felix Huettner via dev wrote:
>> 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 <felix.huettner@stackit.cloud>
>>>> ---
>>>
>>> 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) {...}.
>
> Hi Dumitru,
>
> actually we can not do this (but i just noticed that).
>
> Assume we get a new LRP on a chassis of a running ovn-controller. That
> LRP belongs to a LR that has route-exchange set. The VRF belonging to
> that LR has already been created on the chassis and contains routes that
> ovn-controller should learn.
>
> In this case ovn-controller will in one iteration (at least if i
> understood it correctly):
> 1. claim the port
> 2. add the LR to local_datapaths
> 3. try to learn routes from the VRF
> 4. update monitoring conditions
>
> If we do only monitor learned routes for all local_datapaths then at the
> point where we learn the routes we did not yet call update_sb_monitors.
> So we would try to add a entry to Learned_Route that already exists
> there.
>
> In my understanding the options are:
> 1. monitor all Learned_Route entries
> 2. only try to learn routes after the monitoring condition has been
> updated.
>
> If you would prefer option 2, i would need some hint how to know if we
> have a monitoring condition set.
We could decide to switch from monitoring all Learned_Routes to
monitoring a subset based on daemon_started_recently(). We do something
similar and delay deleting patch ports as long as ovn-controller has
"recently started" in the hope that we won't have to re-add them soon.
Could that work?
Regards,
Dumitru
>
> Thanks a lot,
> Felix
>
>>>
>>>> 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
>>>
>> _______________________________________________
>> dev mailing list
>> d...@openvswitch.org
>> https://mail.openvswitch.org/mailman/listinfo/ovs-dev
>
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