[ovs-dev] [PATCH v2 ovn] ovn-nbctl: dump next-hop for router policies

[Lorenzo Bianconi]

Commit 35b00c7e79 ('northd: Add ECMP support to router policies.')
introduced 'nexthops' column in the Logical_Router_Policy table to
support ECMP for router policies however print_routing_policy() still
dumps legacy 'nexthop' column as policy next hop.
Fix the issue dumping 'nexthops' columns.

Fixes: 35b00c7e79 ('northd: Add ECMP support to router policies.')
Acked-by: Mark Michelson <mmichels at redhat.com>
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi at redhat.com>
---
Changes since v1:
- remove typo in ovn-northd.at
---
 tests/ovn-northd.at   |  7 +++++++
 utilities/ovn-nbctl.c | 14 +++++++++-----
 2 files changed, 16 insertions(+), 5 deletions(-)

diff --git a/tests/ovn-northd.at b/tests/ovn-northd.at
index eef360802..6ece56d6f 100644
--- a/tests/ovn-northd.at
+++ b/tests/ovn-northd.at
@@ -2485,6 +2485,13 @@ check ovn-nbctl lsp-set-options public-lr0 router-port=lr0-public
 
 check ovn-nbctl --wait=sb lr-policy-add lr0  10 "ip4.src == 10.0.0.3" reroute 172.168.0.101,172.168.0.102
 
+ovn-nbctl lr-policy-list lr0 > policy-list
+AT_CAPTURE_FILE([policy-list])
+AT_CHECK([cat policy-list], [0], [dnl
+Routing Policies
+        10                                ip4.src == 10.0.0.3         reroute             172.168.0.101, 172.168.0.102
+])
+
 ovn-sbctl dump-flows lr0 > lr0flows3
 AT_CAPTURE_FILE([lr0flows3])
 
diff --git a/utilities/ovn-nbctl.c b/utilities/ovn-nbctl.c
index 184058356..042c21002 100644
--- a/utilities/ovn-nbctl.c
+++ b/utilities/ovn-nbctl.c
@@ -3865,11 +3865,15 @@ static void
 print_routing_policy(const struct nbrec_logical_router_policy *policy,
                      struct ds *s)
 {
-    if (policy->nexthop != NULL) {
-        char *next_hop = normalize_prefix_str(policy->nexthop);
-        ds_put_format(s, "%10"PRId64" %50s %15s %25s", policy->priority,
-                      policy->match, policy->action, next_hop);
-        free(next_hop);
+    if (policy->n_nexthops) {
+        ds_put_format(s, "%10"PRId64" %50s %15s", policy->priority,
+                      policy->match, policy->action);
+        for (int i = 0; i < policy->n_nexthops; i++) {
+            char *next_hop = normalize_prefix_str(policy->nexthops[i]);
+            char *fmt = i ? ", %s" : " %25s";
+            ds_put_format(s, fmt, next_hop);
+            free(next_hop);
+        }
     } else {
         ds_put_format(s, "%10"PRId64" %50s %15s", policy->priority,
                       policy->match, policy->action);
-- 
2.30.2