[dpdk-dev] [RFC] A REST API based daemon of dpdk-devbind.py

[Muhammad Ahmad <muhammad.ahmad@emumba.com>]

Hi,
I have observed that the dpdk-devbind.py is an interactive tool and
not quite useful for automated testing in CI/CD. We are planning to
create “dpdk-usertools-server” for making it streamlined.
The idea is to create a separate application, which provides REST interface to:
    - Query the current status of devices and drivers
    - Bind and unbind devices to different drivers

Future extensions will be to make dpdk-pmdinfo.py, cpu_layout.py and
dpdk-setup.sh more automation friendly.
=================Details of API====================
-Query Status of devices:
    Fetch the status of all devices or of a given group, supported
groups are: network, crypto, event and mempool devices.
        URL: /devices
        Method:GET
        URL Params: type=[all|net|baseband|crypto|event|mempool|compress]
        Sample call: curl http://127.0.0.1:5000/devices?type=crypto&type=net
        Success Response:
            HTTP response code: 200
            Content:
            [
             {
             "pci":"0000:b7:00.3",
             "type":"net",
             "infoString":"Ethernet Connection X722 for 10GbE SFP+ 37d0",
             "interface":"eno8",
             "driver":"i40e",
             "unusedDriver":"igb_uio",
             "active":false
             }
           ]
       Error response:
           HTTP Code: 400 BAD REQUEST
           Content:
           {
            "code": 1,
            "message": "invalid type"
           }


-Bind/Unbind device with a driver:
    Bind the PCI devices to the given driver or “none” to unbind
        URL:/devices/<pci>
        Method: PUT
        URL Prams: PCI=[PCI address]
        Sample call: curl http://127.0.0.1:5000/devices/0000:b7:00.3
--header "Content-Type: application/json" --request PUT --data
'{driver:"igb_uio", force: false}'
        Success Response:
            HTTP response code: 200
            Content:
            {
             "pci":"0000:b7:00.3",
             "type":"net",
             "infoString":"Ethernet Connection X722 for 10GbE SFP+ 37d0",
             "interface":"",
             "driver":"igb_uio",
             "unusedDriver":"i40e",
             "active":false
             }
       Error response:
           Code: 400 BAD REQUEST
           Content:
          {
           "code": 1,
           "message": "invalid id"
          }

                 OR
          Code: 400 BAD REQUEST
          Content:
          {
          "code": 2,
          "message": "invalid driver"
         }

                 OR
         Code: 405 METHOD NOT ALLOWED
         Content:
         {
          "code": 3,
           "message": "PCI Device active run with force=TRUE"
          }

=================++++++++====================

Signed-off-by: Muhammad Ahmad <muhammad.ahmad@emumba.com>