linux-kernel - Re: [PATCH v6] ice: Add get/set hw address for VFs using devlink commands

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Date: Tue, 26 Mar 2024 14:08:22 +0000
From: Simon Horman <horms@...nel.org>
To: Karthik Sundaravel <ksundara@...hat.com>
Cc: jesse.brandeburg@...el.com, wojciech.drewek@...el.com,
	sumang@...vell.com, jacob.e.keller@...el.com,
	anthony.l.nguyen@...el.com, davem@...emloft.net,
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
	intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, pmenzel@...gen.mpg.de,
	jiri@...nulli.us, michal.swiatkowski@...ux.intel.com,
	rjarry@...hat.com, aharivel@...hat.com, vchundur@...hat.com,
	cfontain@...hat.com
Subject: Re: [PATCH v6] ice: Add get/set hw address for VFs using devlink
 commands

On Thu, Mar 21, 2024 at 01:46:25PM +0530, Karthik Sundaravel wrote:
> Changing the MAC address of the VFs is currently unsupported via devlink.
> Add the function handlers to set and get the HW address for the VFs.
> 
> Signed-off-by: Karthik Sundaravel <ksundara@...hat.com>
> ---
>  drivers/net/ethernet/intel/ice/ice_devlink.c | 66 +++++++++++++++++++-
>  drivers/net/ethernet/intel/ice/ice_sriov.c   | 62 ++++++++++++++++++
>  drivers/net/ethernet/intel/ice/ice_sriov.h   |  8 +++
>  3 files changed, 135 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/intel/ice/ice_devlink.c b/drivers/net/ethernet/intel/ice/ice_devlink.c
> index 80dc5445b50d..35c7cfc8ce9a 100644
> --- a/drivers/net/ethernet/intel/ice/ice_devlink.c
> +++ b/drivers/net/ethernet/intel/ice/ice_devlink.c
> @@ -1576,6 +1576,69 @@ void ice_devlink_destroy_pf_port(struct ice_pf *pf)
>  	devlink_port_unregister(&pf->devlink_port);
>  }
>  
> +/**
> + * ice_devlink_port_get_vf_fn_mac - .port_fn_hw_addr_get devlink handler
> + * @port: devlink port structure
> + * @hw_addr: MAC address of the port
> + * @hw_addr_len: length of MAC address
> + * @extack: extended netdev ack structure
> + *
> + * Callback for the devlink .port_fn_hw_addr_get operation
> + * Return: zero on success or an error code on failure.
> + */
> +
> +static int ice_devlink_port_get_vf_fn_mac(struct devlink_port *port,
> +					  u8 *hw_addr, int *hw_addr_len,
> +					  struct netlink_ext_ack *extack)
> +{
> +	struct ice_vf *vf = container_of(port, struct ice_vf, devlink_port);

nit: blank line here please.

Flagged by checkpatch.

> +	if (!vf) {

Given the way that container_of works, I don't think vf can be NULL.

Flagged by Smatch.

> +		NL_SET_ERR_MSG_MOD(extack, "Unable to get the vf");
> +		return -EINVAL;
> +	}
> +	ether_addr_copy(hw_addr, vf->dev_lan_addr);
> +	*hw_addr_len = ETH_ALEN;
> +
> +	return 0;
> +}

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