device: always assume default-route for generate-assumed-connections

Commit d51975e changed, that we treat assumed and non-assumed
connections the same with respect to the default route. This is
certainly wrong, if we have an nm-generated-assumed connection
at hand. In this case, NM just generated a connection based on what
was configured on the system. Looking at that result and re-enforcing
the default-route is wrong.

We want to manage the default-route for assumed, persistent connections.
If the connection was assumed and generated, we do not.

This commit reverts d51975ed for nm-generated-assumed connection and
restores the previous behavior.

https://bugzilla.redhat.com/show_bug.cgi?id=1244483

Fixes: d51975ed921a5876b76e081b8f3df4e2ca1f1ca9
(cherry picked from commit bebeff69e89de04fdd53e21a0edb5d1fbfbfcf0b)

1 files changed, 20 insertions, 12 deletions

diff --git a/src/devices/nm-device.c b/src/devices/nm-device.c
index 5eeccbe61c..a0aaf03158 100644
--- a/src/devices/nm-device.c
+++ b/src/devices/nm-device.c
@@ -3307,12 +3307,21 @@ ip4_config_merge_and_apply (NMDevice *self,
 		goto END_ADD_DEFAULT_ROUTE;
 	}
 
+	if (nm_device_uses_generated_assumed_connection (self)) {
+		/* a generate-assumed-connection always detects the default route from platform */
+		goto END_ADD_DEFAULT_ROUTE;
+	}
+
+	/* At this point, we treat assumed and non-assumed connections alike.
+	 * For assumed connections we do that because we still manage RA and DHCP
+	 * leases for them, so we must extend/update the default route on commits.
+	 */
+
 	connection_has_default_route
 	    = nm_default_route_manager_ip4_connection_has_default_route (nm_default_route_manager_get (),
 	                                                                 connection, &connection_is_never_default);
 
 	if (   !priv->v4_commit_first_time
-	    && !nm_device_uses_assumed_connection (self)
 	    && connection_is_never_default) {
 		/* If the connection is explicitly configured as never-default, we enforce the (absense of the)
 		 * default-route only once. That allows the user to configure a connection as never-default,
@@ -3320,11 +3329,6 @@ ip4_config_merge_and_apply (NMDevice *self,
 		goto END_ADD_DEFAULT_ROUTE;
 	}
 
-	/* At this point, we treat assumed and non-assumed connections alike.
-	 * For assumed connections we do that because we still manage RA and DHCP
-	 * leases for them, so we must extend/update the default route on commits.
-	 */
-
 	/* we are about to commit (for a non-assumed connection). Enforce whatever we have
 	 * configured. */
 	priv->default_route.v4_is_assumed = FALSE;
@@ -3927,12 +3931,21 @@ ip6_config_merge_and_apply (NMDevice *self,
 		goto END_ADD_DEFAULT_ROUTE;
 	}
 
+	if (nm_device_uses_generated_assumed_connection (self)) {
+		/* a generate-assumed-connection always detects the default route from platform */
+		goto END_ADD_DEFAULT_ROUTE;
+	}
+
+	/* At this point, we treat assumed and non-assumed connections alike.
+	 * For assumed connections we do that because we still manage RA and DHCP
+	 * leases for them, so we must extend/update the default route on commits.
+	 */
+
 	connection_has_default_route
 	    = nm_default_route_manager_ip6_connection_has_default_route (nm_default_route_manager_get (),
 	                                                                 connection, &connection_is_never_default);
 
 	if (   !priv->v6_commit_first_time
-	    && !nm_device_uses_assumed_connection (self)
 	    && connection_is_never_default) {
 		/* If the connection is explicitly configured as never-default, we enforce the (absence of the)
 		 * default-route only once. That allows the user to configure a connection as never-default,
@@ -3940,11 +3953,6 @@ ip6_config_merge_and_apply (NMDevice *self,
 		goto END_ADD_DEFAULT_ROUTE;
 	}
 
-	/* At this point, we treat assumed and non-assumed connections alike.
-	 * For assumed connections we do that because we still manage RA and DHCP
-	 * leases for them, so we must extend/update the default route on commits.
-	 */
-
 	/* we are about to commit (for a non-assumed connection). Enforce whatever we have
 	 * configured. */
 	priv->default_route.v6_is_assumed = FALSE;