Specifying datapath with "dpctl/flush-conntrack" didn't
work as expected and caused error:
ovs-dpctl: field system@ovs-system missing value (Invalid argument)

To prevent that check if we have datapath as first argument
and use it accordingly.

Signed-off-by: Ales Musil <[email protected]>
---
v2: Add test case.
---
 lib/dpctl.c             | 17 ++++++++---------
 tests/system-traffic.at |  2 ++
 2 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/lib/dpctl.c b/lib/dpctl.c
index c501a0cd7..a7a4d8ee8 100644
--- a/lib/dpctl.c
+++ b/lib/dpctl.c
@@ -1717,10 +1717,16 @@ dpctl_flush_conntrack(int argc, const char *argv[],
     uint16_t zone, *pzone = NULL;
     int error;
     int args = argc - 1;
+    int zone_pos = 1;
+
+    if (dp_arg_exists(argc, argv)) {
+        args--;
+        zone_pos = 2;
+    }
 
     /* Parse zone. */
-    if (args && !strncmp(argv[1], "zone=", 5)) {
-        if (!ovs_scan(argv[1], "zone=%"SCNu16, &zone)) {
+    if (args && !strncmp(argv[zone_pos], "zone=", 5)) {
+        if (!ovs_scan(argv[zone_pos], "zone=%"SCNu16, &zone)) {
             ds_put_cstr(&ds, "failed to parse zone");
             error = EINVAL;
             goto error;
@@ -1747,13 +1753,6 @@ dpctl_flush_conntrack(int argc, const char *argv[],
         args--;
     }
 
-    /* Report error if there is more than one unparsed argument. */
-    if (args > 1) {
-        ds_put_cstr(&ds, "invalid arguments");
-        error = EINVAL;
-        goto error;
-    }
-
     error = opt_dpif_open(argc, argv, dpctl_p, 5, &dpif);
     if (error) {
         dpctl_error(dpctl_p, error, "Cannot open dpif");
diff --git a/tests/system-traffic.at b/tests/system-traffic.at
index 380372430..c6ec61dba 100644
--- a/tests/system-traffic.at
+++ b/tests/system-traffic.at
@@ -2360,8 +2360,10 @@ priority=100,in_port=2,icmp,action=ct(zone=5,commit),1
 ])
 
 AT_CHECK([ovs-ofctl --bundle add-flows br0 flows.txt])
+dp=$(ovs-appctl dpctl/dump-dps)
 
 m4_foreach([FLUSH_CMD], [[ovs-appctl dpctl/flush-conntrack],
+                         [ovs-appctl dpctl/flush-conntrack $dp],
                          [ovs-ofctl ct-flush br0]], [
 AS_BOX([Testing with FLUSH_CMD])
 
-- 
2.39.2

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