netdev - Re: [PATCH net] net_sched: do not broadcast RTM

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Date:   Mon, 10 Oct 2016 09:16:05 -0400
From:   Jamal Hadi Salim <jhs@...atatu.com>
To:     Eric Dumazet <eric.dumazet@...il.com>,
        David Miller <davem@...emloft.net>
Cc:     netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net] net_sched: do not broadcast RTM_GETTFILTER result

On 16-10-09 11:25 PM, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@...gle.com>
>
> There are two ways to get tc filters from kernel to user space.
>
> 1) Full dump (tc_dump_tfilter())
> 2) RTM_GETTFILTER to get one precise filter, reducing overhead.
>
> The second operation is unfortunately broadcasting its result,
> polluting "tc monitor" users.
>
> This patch makes sure only the requester gets the result, using
> netlink_unicast() instead of rtnetlink_send()
>
> Jamal cooked an iproute2 patch to implement "tc filter get" operation,
> but other user space libraries already use RTM_GETTFILTER when a single
> filter is queried, instead of dumping all filters.
>
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Acked-by: Jamal Hadi Salim <jhs@...atatu.com>

I will send the iproute2 patch

cheers,
jamal