netdev - Re: [patch net-next 3/6] net_sched: cls_bpf: remove faulty use of list_for_each_entry

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Date:	Wed, 03 Dec 2014 09:37:46 -0500
From:	Jamal Hadi Salim <jhs@...atatu.com>
To:	Jiri Pirko <jiri@...nulli.us>
CC:	netdev@...r.kernel.org, davem@...emloft.net
Subject: Re: [patch net-next 3/6] net_sched: cls_bpf: remove faulty use of
 list_for_each_entry_rcu

On 12/03/14 08:26, Jiri Pirko wrote:
> Wed, Dec 03, 2014 at 01:51:15PM CET, jhs@...atatu.com wrote:

>> I think this may be problematic. Doesnt a flush operation also use the
>> walker?
>
> I don't believe so. Just look at tc_dump_tfilter.
>

Actually we cant flush filters (we could actions).

> But even if that would the the case, _rcu variant is wrong (yep, it
> would have to be replaced by _safe variant then).
>

Sorry, still humping on the get part:
that gets invoked for del for a filter that may be in use in the
datapath. del uses rcu - should get not use rcu in such a case?

cheers,
jamal
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