networkd: bridge - remove redundant state

We will not insist on getting the reply from rtnl that the bridge
was created before considering the bridge ready, as we will be
notified about that via udev. We will listen for the rtnl response
however, in case the creation of the bridge failed.

src/network/networkd-bridge.c

@@ -113,6 +113,9 @@ static int bridge_join_ready(Bridge *bridge, Link* link, sd_rtnl_message_handler
 static int bridge_enter_ready(Bridge *bridge) {
         bridge_join_callback *callback;
 
+        assert(bridge);
+        assert(bridge->name);
+
         bridge->state = BRIDGE_STATE_READY;
 
         log_info_bridge(bridge, "bridge ready");
@@ -130,7 +133,7 @@ static int bridge_create_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userda
         Bridge *bridge = userdata;
         int r;
 
-        assert(bridge->state == BRIDGE_STATE_CREATING);
+        assert(bridge->state != _BRIDGE_STATE_INVALID);
 
         r = sd_rtnl_message_get_errno(m);
         if (r < 0) {
@@ -140,11 +143,6 @@ static int bridge_create_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userda
                 return 1;
         }
 
-        if (bridge->link)
-                bridge_enter_ready(bridge);
-        else
-                bridge->state = BRIDGE_STATE_CREATED;
-
         return 1;
 }
 
@@ -234,18 +232,18 @@ int bridge_join(Bridge *bridge, Link *link, sd_rtnl_message_handler_t callback)
 
 int bridge_set_link(Manager *m, Link *link) {
         Bridge *bridge;
+        int r;
 
-        bridge = hashmap_get(m->bridges, link->ifname);
-        if (!bridge)
-                return -ENOENT;
+        r = bridge_get(m, link->ifname, &bridge);
+        if (r < 0)
+                return r;
 
         if (bridge->link && bridge->link != link)
                 return -EEXIST;
 
         bridge->link = link;
 
-        if (bridge->state == BRIDGE_STATE_CREATED)
-                bridge_enter_ready(bridge);
+        bridge_enter_ready(bridge);
 
         return 0;
 }

src/network/networkd.h

@@ -52,7 +52,6 @@ struct bridge_join_callback {
 typedef enum BridgeState {
         BRIDGE_STATE_FAILED,
         BRIDGE_STATE_CREATING,
-        BRIDGE_STATE_CREATED,
         BRIDGE_STATE_READY,
         _BRIDGE_STATE_MAX,
         _BRIDGE_STATE_INVALID = -1,