netdev - Re: [PATCH net-next v7 5/6] flow_offload: support get multi-subsystem block

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Date:   Mon, 19 Aug 2019 13:27:57 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     Vlad Buslov <vladbu@...lanox.com>
Cc:     wenxu <wenxu@...oud.cn>, David Miller <davem@...emloft.net>,
        Jiri Pirko <jiri@...nulli.us>,
        "pablo@...filter.org" <pablo@...filter.org>,
        "netfilter-devel@...r.kernel.org" <netfilter-devel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next v7 5/6] flow_offload: support get
 multi-subsystem block

On Mon, 19 Aug 2019 07:26:07 +0000, Vlad Buslov wrote:
> On Fri 16 Aug 2019 at 20:56, Jakub Kicinski <jakub.kicinski@...ronome.com> wrote:
> > Hi Vlad!
> >
> > While looking into this, would you mind also add the missing
> > flow_block_cb_is_busy() calls in the indirect handlers in the drivers?
> >
> > LMK if you're too busy, I don't want this to get forgotten :)  
> 
> Hi Jakub,
> 
> I've checked the code and it looks like only nfp driver is affected:
> 
> - I added check in nfp to lookup cb_priv with
>   nfp_flower_indr_block_cb_priv_lookup() and call
>   flow_block_cb_is_busy() if cb_priv exists.
> 
> - In mlx5 en_rep.c there is already a check that indr_priv exists, so
>   trying to lookup block_cb->cb_indent==indr_priv is redundant.
> 
> - Switch drivers (mlxsw and ocelot) take reference to block_cb on
>   FLOW_BLOCK_BIND, so they should not require any modifications.
> 
> Tell me if I missed anything. Sending the patch for nfp.

Ah, that sounds plausible, I've only checked the nfp driver.