This patch tries to fix getPhysFn in macvtap.c to get the physical
function(PF) of the direct attach interface, if the interface is a SR-IOV VF.
It moves some of the sriov pci device handling code from node_device_driver
to src/util/pci.[ch].
This patch series implements the following
01/3 - pci: Move some pci sriov helper code out of node device driver to util/pci
02/3 - pci: Add helper functions for sriov devices
02/3 - interface: Add functions to get sriov PF/VF relationship of a net interface
03/3 - macvtap: Fix getPhysfn to get the PF of a direct attach network interface
Changelog:
----------
v1: RFC patch introduced new functions to get PF/VF relationship of SRIOV
net devices by comparing PF/VF sysfs device links. Also mentioned the
existance of some related code in node_device_driver. The feedback was to
move and use the node_device_driver code
v2: Moves sriov get_physical_function and get_virtual_functions from
node_device_driver to src/util/pci*. And reworks the rest of the patches
around the new code.
Signed-off-by: Roopa Prabhu <roprabhu(a)cisco.com>
Signed-off-by: Christian Benvenuti <benve(a)cisco.com>
Signed-off-by: David Wang <dwang2(a)cisco.com>