netdev - Re: [PATCH net-next v5 2/6] net: dcb: add new apptrust attribute

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Date:   Mon, 31 Oct 2022 11:40:42 +0100
From:   Steen Hegelund <steen.hegelund@...rochip.com>
To:     Daniel Machon <daniel.machon@...rochip.com>,
        <netdev@...r.kernel.org>
CC:     <UNGLinuxDriver@...rochip.com>
Subject: Re: [PATCH net-next v5 2/6] net: dcb: add new apptrust attribute

Hi Daniel,

On Fri, 2022-10-28 at 15:13 +0200, Daniel Machon wrote:
> Add new apptrust extension attributes to the 8021Qaz APP managed object.
> 
> Two new attributes, DCB_ATTR_DCB_APP_TRUST_TABLE and
> DCB_ATTR_DCB_APP_TRUST, has been added. Trusted selectors are passed in
> the nested attribute DCB_ATTR_DCB_APP_TRUST, in order of precedence.
> 
> The new attributes are meant to allow drivers, whose hw supports the
> notion of trust, to be able to set whether a particular app selector is
> trusted - and in which order.
> 
> Signed-off-by: Daniel Machon <daniel.machon@...rochip.com>
> ---

...snip...

> @ -1185,6 +1186,29 @@ static int dcbnl_ieee_fill(struct sk_buff *skb, struct net_device *netdev)
>         spin_unlock_bh(&dcb_lock);
>         nla_nest_end(skb, app);
>  
> +       if (ops->dcbnl_getapptrust) {
> +               u8 selectors[IEEE_8021QAZ_APP_SEL_MAX + 1] = {0};
> +               int nselectors, i;
> +
> +               apptrust = nla_nest_start(skb, DCB_ATTR_DCB_APP_TRUST_TABLE);
> +               if (!app)

apptrust?

> +                       return -EMSGSIZE;
> +
> +               err = ops->dcbnl_getapptrust(netdev, selectors, &nselectors);
> +               if (!err) {
> +                       for (i = 0; i < nselectors; i++) {
> +                               err = nla_put_u8(skb, DCB_ATTR_DCB_APP_TRUST,
> +                                                selectors[i]);
> +                               if (err) {
> +                                       nla_nest_cancel(skb, apptrust);
> +                                       return err;
> +                               }
> +                       }
> +               }
> +
> +               nla_nest_end(skb, apptrust);
> +       }
> +
> 

...snip...

>  err:
>         err = nla_put_u8(skb, DCB_ATTR_IEEE, err);
>         dcbnl_ieee_notify(netdev, RTM_SETDCB, DCB_CMD_IEEE_SET, seq, 0);

BR
Steen