netdev: Fix carrier status for down interfaces.

[sliver-openvswitch.git] / lib / netdev-provider.h

diff --git a/lib/netdev-provider.h b/lib/netdev-provider.h
index 52f440f..fb610d7 100644 (file)
--- a/lib/netdev-provider.h
+++ b/lib/netdev-provider.h
@@ -40,7 +40,7 @@ struct arg {
  * implementations. */
 struct netdev_dev {
     char *name;                         /* Name of network device. */
-    const struct netdev_class *netdev_class; /* Functions to control 
+    const struct netdev_class *netdev_class; /* Functions to control
                                                 this device. */
     int ref_cnt;                        /* Times this devices was opened. */
     struct shash_node *node;            /* Pointer to element in global map. */
@@ -259,7 +259,11 @@ struct netdev_class {
     int (*get_ifindex)(const struct netdev *netdev);
 
     /* Sets 'carrier' to true if carrier is active (link light is on) on
-     * 'netdev'. */
+     * 'netdev'.
+     *
+     * May be null if device does not provide carrier status (will be always
+     * up as long as device is up).
+     */
     int (*get_carrier)(const struct netdev *netdev, bool *carrier);
 
     /* Retrieves current device stats for 'netdev' into 'stats'.
@@ -550,6 +554,7 @@ extern const struct netdev_class netdev_linux_class;
 extern const struct netdev_class netdev_tap_class;
 extern const struct netdev_class netdev_patch_class;
 extern const struct netdev_class netdev_gre_class;
+extern const struct netdev_class netdev_capwap_class;
 
 #ifdef  __cplusplus
 }