netdev - Re: [PATCH net-next v2 2/6] net: dcb: add new common function for set/del of app/rewr entries

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Message-ID: <874jsow1b6.fsf@nvidia.com>
Date:   Wed, 18 Jan 2023 12:03:17 +0100
From:   Petr Machata <petrm@...dia.com>
To:     Petr Machata <petrm@...dia.com>
CC:     Daniel Machon <daniel.machon@...rochip.com>,
        <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>, <vladimir.oltean@....com>,
        <maxime.chevallier@...tlin.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next v2 2/6] net: dcb: add new common function for
 set/del of app/rewr entries


Petr Machata <petrm@...dia.com> writes:

> 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>

... though, now that I found some issues in 3/6, if you would somehow
reformat the ?: expression that's now awkwardly split to two unaligned
lines, that would placate my OCD:

+		err = dcbnl_app_table_setdel(ieee[DCB_ATTR_IEEE_APP_TABLE],
+					     netdev, ops->ieee_setapp ?:
+					     dcb_ieee_setapp);

(and the one other).