centos man page for netdev_master_upper_dev_link

NETDEV_MASTER_UPPER_(9) 				      Network device support					   NETDEV_MASTER_UPPER_(9)

NAME
       netdev_master_upper_dev_link - Add a master link to the upper device

SYNOPSIS
       int netdev_master_upper_dev_link(struct net_device * dev, struct net_device * upper_dev);

ARGUMENTS
       dev
	   device

       upper_dev
	   new upper device

DESCRIPTION
       Adds a link to device which is upper to this one. In this case, only one master upper device can be linked, although other non-master
       devices might be linked as well. The caller must hold the RTNL lock. On a failure a negative errno code is returned. On success the
       reference counts are adjusted and the function returns zero.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   NETDEV_MASTER_UPPER_(9)