device: drop capture_lease_config() during connection assumption

Drop capture_lease_config(). It was added by commit
0321073b3cb9060817c7743e1c203c6b72659dfe.

Note that it was only called by

  ...
  - manager:recheck_assume_connection()
    - manager:get_existing_connection()
      - nm_device_capture_initial_config()
        - update_ext_ip_config(addr_family=AF_INET, initial=TRUE)
          - capture_lease_config()

It had only effect when the device had IPv4 permanent addresses.
But then, capture_lease_config() would go on and iterate over
all connections (sorted by last-connect timestamp). It would
consider connection candidates that are compatible with the device,
and try to read the lease information from disk

It's really unclear what this means. For assuming (graceful take over),
do we need the lease information in the device? I don't think so,
because we will match an existing connection. The lease information
shall be read while activating (if necessary).

For external connections, we don't even have a matching connection
and we always generate a new one. It doesn't seem right to consider
leases from disk, for a different connection.

Just drop this. It's really ugly. If this causes an issue, it must be
fixed differently. We want to behave determinstically and well defined.
I don't even comprehend all the implications of what this had.

Also note that update_ext_ip_config() no longer clears
priv->dev_ip4_config.

1 files changed, 0 insertions, 118 deletions

diff --git a/src/devices/nm-device.c b/src/devices/nm-device.c
index 98085c9dca..968d7a3cf6 100644
--- a/src/devices/nm-device.c
+++ b/src/devices/nm-device.c
@@ -11264,116 +11264,6 @@ nm_device_get_firmware_missing (NMDevice *self)
 	return NM_DEVICE_GET_PRIVATE (self)->firmware_missing;
 }
 
-static NMIP4Config *
-find_ip4_lease_config (NMDevice *self,
-                       NMConnection *connection,
-                       NMIP4Config *ext_ip4_config)
-{
-	const char *ip_iface = nm_device_get_ip_iface (self);
-	int ip_ifindex = nm_device_get_ip_ifindex (self);
-	GSList *leases, *liter;
-	NMIP4Config *found = NULL;
-
-	g_return_val_if_fail (NM_IS_IP4_CONFIG (ext_ip4_config), NULL);
-	g_return_val_if_fail (NM_IS_CONNECTION (connection), NULL);
-
-	leases = nm_dhcp_manager_get_lease_ip_configs (nm_dhcp_manager_get (),
-	                                               nm_device_get_multi_index (self),
-	                                               AF_INET,
-	                                               ip_iface,
-	                                               ip_ifindex,
-	                                               nm_connection_get_uuid (connection),
-	                                               nm_device_get_route_table (self, AF_INET, TRUE),
-	                                               nm_device_get_route_metric (self, AF_INET));
-	for (liter = leases; liter && !found; liter = liter->next) {
-		NMIP4Config *lease_config = liter->data;
-		const NMPlatformIP4Address *address = nm_ip4_config_get_first_address (lease_config);
-		const NMPObject *gw1, *gw2;
-
-		g_assert (address);
-		if (!nm_ip4_config_address_exists (ext_ip4_config, address))
-			continue;
-		gw1 = nm_ip4_config_best_default_route_get (lease_config);
-		if (!gw1)
-			continue;
-		gw2 = nm_ip4_config_best_default_route_get (ext_ip4_config);
-		if (!gw2)
-			continue;
-		if (NMP_OBJECT_CAST_IP4_ROUTE (gw1)->gateway != NMP_OBJECT_CAST_IP4_ROUTE (gw2)->gateway)
-			continue;
-		found = g_object_ref (lease_config);
-	}
-
-	g_slist_free_full (leases, g_object_unref);
-	return found;
-}
-
-static void
-capture_lease_config (NMDevice *self,
-                      NMIP4Config *ext_ip4_config,
-                      NMIP4Config **out_ip4_config,
-                      NMIP6Config *ext_ip6_config,
-                      NMIP6Config **out_ip6_config)
-{
-	NMDevicePrivate *priv = NM_DEVICE_GET_PRIVATE (self);
-	NMSettingsConnection *const*connections;
-	guint i;
-	gboolean dhcp_used = FALSE;
-	NMDedupMultiIter ipconf_iter;
-
-	/* Ensure at least one address on the device has a non-infinite lifetime,
-	 * otherwise DHCP cannot possibly be active on the device right now.
-	 */
-	if (ext_ip4_config && out_ip4_config) {
-		const NMPlatformIP4Address *addr;
-
-		nm_ip_config_iter_ip4_address_for_each (&ipconf_iter, ext_ip4_config, &addr) {
-			if (addr->lifetime != NM_PLATFORM_LIFETIME_PERMANENT) {
-				dhcp_used = TRUE;
-				break;
-			}
-		}
-	} else if (ext_ip6_config && out_ip6_config) {
-		const NMPlatformIP6Address *addr;
-
-		nm_ip_config_iter_ip6_address_for_each (&ipconf_iter, ext_ip6_config, &addr) {
-			if (addr->lifetime != NM_PLATFORM_LIFETIME_PERMANENT) {
-				dhcp_used = TRUE;
-				break;
-			}
-		}
-	} else {
-		g_return_if_fail (   (ext_ip6_config && out_ip6_config)
-		                  || (ext_ip4_config && out_ip4_config));
-	}
-
-	if (!dhcp_used)
-		return;
-
-	connections = nm_settings_get_connections (priv->settings, NULL);
-	for (i = 0; connections[i]; i++) {
-		NMConnection *candidate = (NMConnection *) connections[i];
-		const char *method;
-
-		if (!nm_device_check_connection_compatible (self, candidate))
-			continue;
-
-		/* IPv4 leases */
-		method = nm_utils_get_ip_config_method (candidate, NM_TYPE_SETTING_IP4_CONFIG);
-		if (out_ip4_config && strcmp (method, NM_SETTING_IP4_CONFIG_METHOD_AUTO) == 0) {
-			*out_ip4_config = find_ip4_lease_config (self, candidate, ext_ip4_config);
-			if (*out_ip4_config)
-				return;
-		}
-
-		/* IPv6 leases */
-		method = nm_utils_get_ip_config_method (candidate, NM_TYPE_SETTING_IP6_CONFIG);
-		if (out_ip6_config && strcmp (method, NM_SETTING_IP6_CONFIG_METHOD_AUTO) == 0) {
-			/* FIXME: implement find_ip6_lease_config() */
-		}
-	}
-}
-
 static void
 intersect_ext_config (NMDevice *self, AppliedConfig *config)
 {
@@ -11425,14 +11315,6 @@ update_ext_ip_config (NMDevice *self, int addr_family, gboolean initial, gboolea
 		                                              ifindex,
 		                                              capture_resolv_conf);
 		if (priv->ext_ip4_config) {
-			if (initial) {
-				applied_config_clear (&priv->dev_ip4_config);
-				capture_lease_config (self,
-				                      priv->ext_ip4_config,
-				                      (NMIP4Config **) &priv->dev_ip4_config.orig,
-				                      NULL, NULL);
-			}
-
 			if (intersect_configs) {
 				/* This function was called upon external changes. Remove the configuration
 				 * (addresses,routes) that is no longer present externally from the internal