SR-IOV enabler

This script creates SR-IOV virtual functions on specified interface and creates
a network in libvirt which will later expand to various virtual functions. It
was written specically for interfaces drived by igb mod(Intel 82575/6, 82580,
I350, and I210/211-Based Gigabit Network Connections, full list at [1]). But
with a little revise you can adapt it to your interface with a different
driver.  For revising, see [2], [3].

Usage: sr-iov-enable.sh <physical function>

[1]: https://downloadcenter.intel.com/download/13663/Network-Adapter-Driver-for-82575-6-82580-I350-and-I210-211-Based-Gigabit-Network-Connections-for-Linux-

[2]: http://wiki.libvirt.org/page/Networking#Assignment_with_.3Cinterface_type.3D.27hostdev.27.3E_.28SRIOV_devices_only.29

[3]: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization_Host_Configuration_and_Guest_Installation_Guide/sect-Virtualization_Host_Configuration_and_Guest_Installation_Guide-SR_IOV-How_SR_IOV_Libvirt_Works.html