X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Fnetdev-provider.h;h=22b00f72866cf00a6198271bf0b295d376a95b51;hb=14622f22abd93ca464c9be1b6b58d6f0fb2bb186;hp=b8f65291927c2d334d988c4788c96f31d9dac288;hpb=9b02078077b62e4277e84c7f39382ce09986cf6b;p=sliver-openvswitch.git

diff --git a/lib/netdev-provider.h b/lib/netdev-provider.h
index b8f652919..22b00f728 100644
--- a/lib/netdev-provider.h
+++ b/lib/netdev-provider.h
@@ -248,13 +248,15 @@ struct netdev_class {
      * bytes for Ethernet devices.
      *
      * If 'netdev' does not have an MTU (e.g. as some tunnels do not), then
-     * this function should return EOPNOTSUPP. */
+     * this function should return EOPNOTSUPP.  This function may be set to
+     * null if it would always return EOPNOTSUPP. */
     int (*get_mtu)(const struct netdev *netdev, int *mtup);
 
     /* Sets 'netdev''s MTU to 'mtu'.
      *
      * If 'netdev' does not have an MTU (e.g. as some tunnels do not), then
-     * this function should return EOPNOTSUPP. */
+     * this function should return EOPNOTSUPP.  This function may be set to
+     * null if it would always return EOPNOTSUPP. */
     int (*set_mtu)(const struct netdev *netdev, int mtu);
 
     /* Returns the ifindex of 'netdev', if successful, as a positive number.