network/netdev: fix counter handling if request is cancelled

Follow-up for 1003093604661bd984574889167f2ff4dfd6209c.

If a netdev is detached for some reasons, then previously the request
was simply cancelled, and the underlying interface never enter the
configured state, as the 'stacked_netdevs_created' flag never set.

This makes the counter decremented manually by the function, and set the
flag. So, the underlying interface can eter the configured state.

diff --git a/src/network/netdev/netdev.c b/src/network/netdev/netdev.c
index 32050ecf60debaa1b326796f506fd1b056846b2b..6cce3838d1fe35618ff44964938605bd84046c9c 100644 (file)
--- a/src/network/netdev/netdev.c
+++ b/src/network/netdev/netdev.c
@@ -854,7 +854,7 @@ static int stacked_netdev_process_request(Request *req, Link *link, void *userda
         assert(link);
 
         if (!netdev_is_managed(netdev))
-                return 1; /* Already detached, due to e.g. reloading .netdev files, cancelling the request. */
+                goto cancelled; /* Already detached, due to e.g. reloading .netdev files, cancelling the request. */
 
         r = netdev_is_ready_to_create(netdev, link);
         if (r <= 0)
@@ -865,6 +865,18 @@ static int stacked_netdev_process_request(Request *req, Link *link, void *userda
                 return log_netdev_warning_errno(netdev, r, "Failed to create netdev: %m");
 
         return 1;
+
+cancelled:
+        assert_se(TAKE_PTR(req->counter) == &link->create_stacked_netdev_messages);
+        link->create_stacked_netdev_messages--;
+
+        if (link->create_stacked_netdev_messages == 0) {
+                link->stacked_netdevs_created = true;
+                log_link_debug(link, "Stacked netdevs created.");
+                link_check_ready(link);
+        }
+
+        return 1;
 }
 
 static int create_stacked_netdev_handler(sd_netlink *rtnl, sd_netlink_message *m, Request *req, Link *link, void *userdata) {