netdev - Re: [PATCH net-next v3 2/6] net: dcb: add new common function for set/del of app/rewr entries

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Date:   Thu, 19 Jan 2023 10:21:31 +0100
From:   Petr Machata <petrm@...dia.com>
To:     Daniel Machon <daniel.machon@...rochip.com>
CC:     <netdev@...r.kernel.org>, <davem@...emloft.net>,
        <edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
        <lars.povlsen@...rochip.com>, <Steen.Hegelund@...rochip.com>,
        <UNGLinuxDriver@...rochip.com>, <joe@...ches.com>,
        <error27@...il.com>, <horatiu.vultur@...rochip.com>,
        <Julia.Lawall@...ia.fr>, <petrm@...dia.com>,
        <vladimir.oltean@....com>, <maxime.chevallier@...tlin.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next v3 2/6] net: dcb: add new common function for
 set/del of app/rewr entries


Daniel Machon <daniel.machon@...rochip.com> writes:

> In preparation for DCB rewrite. Add a new function for setting and
> deleting both app and rewrite entries. Moving this into a separate
> function reduces duplicate code, as both type of entries requires the
> same set of checks. The function will now iterate through a configurable
> nested attribute (app or rewrite attr), validate each attribute and call
> the appropriate set- or delete function.
>
> Note that this function always checks for nla_len(attr_itr) <
> sizeof(struct dcb_app), which was only done in dcbnl_ieee_set and not in
> dcbnl_ieee_del prior to this patch. This means, that any userspace tool
> that used to shove in data < sizeof(struct dcb_app) would now receive
> -ERANGE.
>
> Signed-off-by: Daniel Machon <daniel.machon@...rochip.com>

Reviewed-by: Petr Machata <petrm@...dia.com>