platform: expose GUdevDevice instance for platform links

src/devices/nm-device-ethernet.c

@@ -52,6 +52,7 @@
 #include "nm-connection-provider.h"
 #include "nm-device-factory.h"
 #include "nm-core-internal.h"
+#include "NetworkManagerUtils.h"
 
 #include "nm-device-ethernet-glue.h"
 
@@ -151,28 +152,21 @@ static void
 _update_s390_subchannels (NMDeviceEthernet *self)
 {
 	NMDeviceEthernetPrivate *priv = NM_DEVICE_ETHERNET_GET_PRIVATE (self);
-	GUdevClient *client;
 	GUdevDevice *dev;
 	GUdevDevice *parent = NULL;
 	const char *parent_path, *item, *driver;
-	const char *subsystems[] = { "net", NULL };
-	const char *iface;
+	int ifindex;
 	GDir *dir;
 	GError *error = NULL;
 
-	client = g_udev_client_new (subsystems);
-	if (!client) {
-		_LOGW (LOGD_DEVICE | LOGD_HW, "failed to initialize GUdev client");
-		return;
-	}
-
-	iface = nm_device_get_iface (NM_DEVICE (self));
-	dev = iface ? g_udev_client_query_by_subsystem_and_name (client, "net", iface) : NULL;
+	ifindex = nm_device_get_ifindex (NM_DEVICE (self));
+	dev = (GUdevDevice *) nm_platform_link_get_udev_device (NM_PLATFORM_GET, ifindex);
 	if (!dev) {
-		_LOGW (LOGD_DEVICE | LOGD_HW, "failed to find device '%s' with udev",
-		       iface ? iface : "(null)");
+		_LOGW (LOGD_DEVICE | LOGD_HW, "failed to find device %d '%s' with udev",
+		       ifindex, str_if_set (nm_device_get_iface (NM_DEVICE (self)), "(null)"));
 		goto out;
 	}
+	g_object_ref (dev);
 
 	/* Try for the "ccwgroup" parent */
 	parent = g_udev_device_get_parent_with_subsystem (dev, "ccwgroup", NULL);
@@ -244,7 +238,6 @@ out:
 		g_object_unref (parent);
 	if (dev)
 		g_object_unref (dev);
-	g_object_unref (client);
 }
 
 static GObject*

src/platform/nm-linux-platform.c

@@ -2969,6 +2969,20 @@ link_get_udi (NMPlatform *platform, int ifindex)
 	return g_udev_device_get_sysfs_path (obj->_link.udev.device);
 }
 
+static GObject *
+link_get_udev_device (NMPlatform *platform, int ifindex)
+{
+	const NMPObject *obj_cache;
+
+	/* we don't use cache_lookup_link() because this would return NULL
+	 * if the link is not visible in libnl. For link_get_udev_device()
+	 * we want to return whatever we have, even if the link itself
+	 * appears invisible via other platform functions. */
+
+	obj_cache = nmp_cache_lookup_link (NM_LINUX_PLATFORM_GET_PRIVATE (platform)->cache, ifindex);
+	return obj_cache ? (GObject *) obj_cache->_link.udev.device : NULL;
+}
+
 static gboolean
 link_get_user_ipv6ll_enabled (NMPlatform *platform, int ifindex)
 {
@@ -4999,6 +5013,7 @@ nm_linux_platform_class_init (NMLinuxPlatformClass *klass)
 	platform_class->link_uses_arp = link_uses_arp;
 
 	platform_class->link_get_udi = link_get_udi;
+	platform_class->link_get_udev_device = link_get_udev_device;
 	platform_class->link_get_ipv6_token = link_get_ipv6_token;
 
 	platform_class->link_get_user_ipv6ll_enabled = link_get_user_ipv6ll_enabled;

src/platform/nm-platform.c

@@ -928,6 +928,19 @@ nm_platform_link_get_udi (NMPlatform *self, int ifindex)
 	return NULL;
 }
 
+GObject *
+nm_platform_link_get_udev_device (NMPlatform *self, int ifindex)
+{
+	_CHECK_SELF (self, klass, FALSE);
+	reset_error (self);
+
+	g_return_val_if_fail (ifindex >= 0, NULL);
+
+	if (klass->link_get_udev_device)
+		return klass->link_get_udev_device (self, ifindex);
+	return NULL;
+}
+
 /**
  * nm_platform_link_get_user_ip6vll_enabled:
  * @self: platform instance

src/platform/nm-platform.h

@@ -433,6 +433,7 @@ typedef struct {
 	gboolean (*link_uses_arp) (NMPlatform *, int ifindex);
 
 	const char *(*link_get_udi) (NMPlatform *self, int ifindex);
+	GObject *(*link_get_udev_device) (NMPlatform *self, int ifindex);
 	gboolean (*link_get_ipv6_token) (NMPlatform *, int ifindex, NMUtilsIPv6IfaceId *iid);
 
 	gboolean (*link_get_user_ipv6ll_enabled) (NMPlatform *, int ifindex);
@@ -624,6 +625,8 @@ gboolean nm_platform_link_uses_arp (NMPlatform *self, int ifindex);
 gboolean nm_platform_link_get_ipv6_token (NMPlatform *self, int ifindex, NMUtilsIPv6IfaceId *iid);
 const char *nm_platform_link_get_udi (NMPlatform *self, int ifindex);
 
+GObject *nm_platform_link_get_udev_device (NMPlatform *self, int ifindex);
+
 gboolean nm_platform_link_get_user_ipv6ll_enabled (NMPlatform *self, int ifindex);
 gboolean nm_platform_link_set_user_ipv6ll_enabled (NMPlatform *self, int ifindex, gboolean enabled);