[dpdk-dev] [PATCH v2 0/3] Support setting link up and link down

[Cao, Waterman]

Tested-by: Waterman Cao <waterman.cao at intel.com>

This patch is used to fix bug, and has been tested by Intel.
We verified API by testpmd, it passed.
Please see test steps as the following:
1. In the host machine, set the DPDK environment as usual and start testpmd:
  ./app/test-pmd/testpmd -c f -n 4 -- -i
2. Start packet forwarding on both ports.
3. In the tester/traffic generator, send the packet with destine MAC to any port on host.
4. Then launch testpmd on host, use the following command to set link up/down to the port:
   testpmd> set link-up port 0(or 1)
   testpmd> set link-down port 0(or 1)
5. Then check port status

See test environment information as the following:
  Fedora 20 x86_64, Linux Kernel 3.13.9-200, GCC 4.8.2
  Intel Xeon CPU E5-2680 v2 @ 2.80GHz
  NIC: Intel Niantic 82599, Intel i350, Intel 82580 and Intel 82576