[PATCH iproute2-next v2 0/6] Support devlink port add delete

[Parav Pandit <parav@nvidia.com>]

This patchset implements devlink port add, delete and function state
management commands.

An example sequence for a PCI SF:

Set the device in switchdev mode:
$ devlink dev eswitch set pci/0000:06:00.0 mode switchdev

View ports in switchdev mode:
$ devlink port show
pci/0000:06:00.0/65535: type eth netdev ens2f0np0 flavour physical port 0 splittable false

Add a subfunction port for PCI PF 0 with sfnumber 88:
$ devlink port add pci/0000:06:00.0 flavour pcisf pfnum 0 sfnum 88
pci/0000:08:00.0/32768: type eth netdev eth6 flavour pcisf controller 0 pfnum 0 sfnum 88 splittable false
  function:
    hw_addr 00:00:00:00:00:00 state inactive opstate detached

Show a newly added port:
$ devlink port show pci/0000:06:00.0/32768
pci/0000:06:00.0/32768: type eth netdev ens2f0npf0sf88 flavour pcisf controller 0 pfnum 0 sfnum 88 splittable false
  function:
    hw_addr 00:00:00:00:00:00 state inactive opstate detached

Set the function state to active:
$ devlink port function set pci/0000:06:00.0/32768 hw_addr 00:00:00:00:88:88 state active

Show the port in JSON format:
$ devlink port show pci/0000:06:00.0/32768 -jp
{
    "port": {
        "pci/0000:06:00.0/32768": {
            "type": "eth",
            "netdev": "ens2f0npf0sf88",
            "flavour": "pcisf",
            "controller": 0,
            "pfnum": 0,
            "sfnum": 88,
            "splittable": false,
            "function": {
                "hw_addr": "00:00:00:00:88:88",
                "state": "active",
                "opstate": "attached"
            }
        }
    }
}

Set the function state to active:
$ devlink port function set pci/0000:06:00.0/32768 state inactive

Delete the port after use:
$ devlink port del pci/0000:06:00.0/32768

Patch summary:
Patch-1 updates kernel headers
Patch-2 introduces string to number map helper and uses it for port
flavour
Patch-3 shows PCI SF port attributes
Patch-4 adds devlink commands to add and delete a port along with man
page
Patch-5 shows function state and operational state to user
Patch-6 enables user to set function state and adds man page
documentation


Parav Pandit (6):
  devlink: Update kernel headers
  devlink: Introduce and use string to number mapper
  devlink: Introduce PCI SF port flavour and attribute
  devlink: Supporting add and delete of devlink port
  devlink: Support get port function state
  devlink: Support set of port function state

 devlink/devlink.c            | 260 ++++++++++++++++++++++++++++++-----
 include/uapi/linux/devlink.h |  25 ++++
 include/utils.h              |   9 ++
 lib/utils.c                  |  41 ++++++
 man/man8/devlink-port.8      | 127 +++++++++++++++++
 5 files changed, 429 insertions(+), 33 deletions(-)

-- 
2.26.2