This patch adds conntrack zone flush when port binding is released.
system-test is added to test this functionality.

Reported-at: 
https://mail.openvswitch.org/pipermail/ovs-dev/2022-September/397524.html
Signed-off-by: Vladislav Odintsov <[email protected]>
---
 controller/ovn-controller.c |  4 +-
 tests/system-ovn.at         | 77 +++++++++++++++++++++++++++++++++++++
 2 files changed, 79 insertions(+), 2 deletions(-)

diff --git a/controller/ovn-controller.c b/controller/ovn-controller.c
index 89a495a04..fb81d143c 100644
--- a/controller/ovn-controller.c
+++ b/controller/ovn-controller.c
@@ -692,7 +692,7 @@ update_ct_zones(const struct shash *binding_lports,
             VLOG_DBG("removing ct zone %"PRId32" for '%s'",
                      ct_zone->data, ct_zone->name);
 
-            add_pending_ct_zone_entry(pending_ct_zones, CT_ZONE_DB_QUEUED,
+            add_pending_ct_zone_entry(pending_ct_zones, CT_ZONE_OF_QUEUED,
                                       ct_zone->data, false, ct_zone->name);
 
             bitmap_set0(ct_zone_bitmap, ct_zone->data);
@@ -2223,7 +2223,7 @@ ct_zones_runtime_data_handler(struct engine_node *node, 
void *data)
                                t_lport->pb->logical_port);
                 if (ct_zone) {
                     add_pending_ct_zone_entry(
-                        &ct_zones_data->pending, CT_ZONE_DB_QUEUED,
+                        &ct_zones_data->pending, CT_ZONE_OF_QUEUED,
                         ct_zone->data, false, ct_zone->name);
 
                     bitmap_set0(ct_zones_data->bitmap, ct_zone->data);
diff --git a/tests/system-ovn.at b/tests/system-ovn.at
index 992813614..8acfb3e39 100644
--- a/tests/system-ovn.at
+++ b/tests/system-ovn.at
@@ -4144,6 +4144,83 @@ OVS_TRAFFIC_VSWITCHD_STOP(["/failed to query port 
patch-.*/d
 AT_CLEANUP
 ])
 
+OVN_FOR_EACH_NORTHD([
+AT_SETUP([conntrack zone flush after port binding release])
+
+CHECK_CONNTRACK()
+ovn_start
+OVS_TRAFFIC_VSWITCHD_START()
+ADD_BR([br-int])
+
+# Set external-ids in br-int needed for ovn-controller
+ovs-vsctl \
+        -- set Open_vSwitch . external-ids:system-id=hv1 \
+        -- set Open_vSwitch . 
external-ids:ovn-remote=unix:$ovs_base/ovn-sb/ovn-sb.sock \
+        -- set Open_vSwitch . external-ids:ovn-encap-type=geneve \
+        -- set Open_vSwitch . external-ids:ovn-encap-ip=169.0.0.1 \
+        -- set bridge br-int fail-mode=secure other-config:disable-in-band=true
+
+# Start ovn-controller
+start_daemon ovn-controller
+
+# Logical network:
+# One LS ls1 with two lports p1 and p2.
+# Stateful ACL is added to ls1.
+#
+#    foo -- R1 -- alice
+#           |
+#    bar ----
+
+check ovn-nbctl ls-add ls1
+check ovn-nbctl acl-add ls1 from-lport 1 1 allow-related
+
+# Logical port 'p1' in switch 'ls1'.
+ADD_NAMESPACES(p1)
+ADD_VETH(p1, p1, br-int, "192.168.1.10/24", "00:00:00:00:00:10")
+ovn-nbctl lsp-add ls1 p1 \
+-- lsp-set-addresses p1 "00:00:00:00:00:10 192.168.1.10"
+
+# Logical port 'p2' in switch 'ls1'.
+ovn-nbctl lsp-add ls1 p2 \
+-- lsp-set-addresses p2 "00:00:00:00:00:20 192.168.1.20"
+
+ovn-nbctl --wait=hv sync
+
+zone_id=$(ovn-appctl -t ovn-controller ct-zone-list | grep p1 | cut -d ' ' -f2)
+
+# ping from p1 to p2
+NS_CHECK_EXEC([p1], [ping -q -c 1 -w1 192.168.1.20 > /dev/null], [1])
+
+# check conntrack zone has icmp entry
+AT_CHECK([ovs-appctl dpctl/dump-conntrack zone=$zone_id | \
+FORMAT_CT(192.168.1.10) | \
+sed -e 's/zone=[[0-9]]*/zone=<cleared>/'], [0], [dnl
+icmp,orig=(src=192.168.1.10,dst=192.168.1.20,id=<cleared>,type=8,code=0),reply=(src=192.168.1.20,dst=192.168.1.10,id=<cleared>,type=0,code=0),zone=<cleared>
+])
+
+# release port binding
+check ovs-vsctl clear interface ovs-p1 external_ids
+
+# check conntrack zone is flushed
+check ovs-appctl dpctl/dump-conntrack zone=$zone_id
+
+OVS_APP_EXIT_AND_WAIT([ovn-controller])
+
+as ovn-sb
+OVS_APP_EXIT_AND_WAIT([ovsdb-server])
+
+as ovn-nb
+OVS_APP_EXIT_AND_WAIT([ovsdb-server])
+
+as northd
+OVS_APP_EXIT_AND_WAIT([NORTHD_TYPE])
+
+as
+OVS_TRAFFIC_VSWITCHD_STOP(["/failed to query port patch-.*/d
+/connection dropped.*/d"])
+AT_CLEANUP
+])
+
 OVN_FOR_EACH_NORTHD([
 AT_SETUP([2 LSs IGMP and MLD])
 AT_SKIP_IF([test $HAVE_TCPDUMP = no])
-- 
2.36.1

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