udev: net_id - skip stacked network devices

diff --git a/src/udev/udev-builtin-net_id.c b/src/udev/udev-builtin-net_id.c
index d5db762e80cfa0264f319a6b36a86f5ecba38419..1975c6d62c5af6e7db918a4ca45d817f47fef4ea 100644 (file)
--- a/src/udev/udev-builtin-net_id.c
+++ b/src/udev/udev-builtin-net_id.c
@@ -366,6 +366,7 @@ static int ieee_oui(struct udev_device *dev, struct netnames *names, bool test)
 
 static int builtin_net_id(struct udev_device *dev, int argc, char *argv[], bool test) {
         const char *s;
+        const char *p;
         unsigned int i;
         const char *devtype;
         const char *prefix = "en";
@@ -380,6 +381,16 @@ static int builtin_net_id(struct udev_device *dev, int argc, char *argv[], bool
         if (i != 1)
                 return 0;
 
+        /* skip stacked devices, like VLANs, ... */
+        s = udev_device_get_sysattr_value(dev, "ifindex");
+        if (!s)
+                return EXIT_FAILURE;
+        p = udev_device_get_sysattr_value(dev, "iflink");
+        if (!p)
+                return EXIT_FAILURE;
+        if (strcmp(s, p) != 0)
+                return 0;
+
         devtype = udev_device_get_devtype(dev);
         if (devtype) {
                 if (streq("wlan", devtype))