[PATCH net-next 3/3] devlink: Show controller number of a devlink port

[Parav Pandit]

Show the controller number of the devlink port whenever kernel reports
it.

Example of a PCI VF port for an external controller number 1:

$ devlink port show pci/0000:06:00.0/2
pci/0000:06:00.0/2: type eth netdev ens2f0c1pf0vf1 flavour pcivf controller 1 
pfnum 0 vfnum 1 external true splittable false
  function:
    hw_addr 00:00:00:00:00:00

$ devlink port show pci/0000:06:00.0/2 -jp
{
    "port": {
        "pci/0000:06:00.0/2": {
            "type": "eth",
            "netdev": "ens2f0c1pf0vf1",
            "flavour": "pcivf",
            "controller": 1,
            "pfnum": 0,
            "vfnum": 1,
            "external": true,
            "splittable": false,
            "function": {
                "hw_addr": "00:00:00:00:00:00"
            }
        }
    }
}

Signed-off-by: Parav Pandit <pa...@nvidia.com>
Reviewed-by: Jiri Pirko <j...@nvidia.com>
---
 devlink/devlink.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/devlink/devlink.c b/devlink/devlink.c
index 9f99c031..0374175e 100644
--- a/devlink/devlink.c
+++ b/devlink/devlink.c
@@ -3343,6 +3343,9 @@ static void pr_out_port_pfvf_num(struct dl *dl, struct 
nlattr **tb)
 {
        uint16_t fn_num;
 
+       if (tb[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER])
+               print_uint(PRINT_ANY, "controller", " controller %u",
+                          
mnl_attr_get_u32(tb[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]));
        if (tb[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]) {
                fn_num = mnl_attr_get_u16(tb[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]);
                print_uint(PRINT_ANY, "pfnum", " pfnum %u", fn_num);
-- 
2.26.2