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Date: Wed, 29 Jul 2015 08:56:08 -0400 (EDT)
From: Thomas Huth <thuth@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH 00/12] For QEMU 2.5: Add a netfilter object
 and netbuffer filter
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To: Yang Hongyang <yanghy@cn.fujitsu.com>
Cc: zhang zhanghailiang <zhang.zhanghailiang@huawei.com>, jasowang@redhat.com, qemu-devel@nongnu.org, mrhines@linux.vnet.ibm.com, stefanha@redhat.com

On Wednesday, July 29, 2015 12:51:44 PM,
"Yang Hongyang" <yanghy@cn.fujitsu.com> wrote:
> 
> I do not take this as v2 because the design of this has been changed,
> and code is rewritten. according to thread:
> http://lists.nongnu.org/archive/html/qemu-devel/2015-07/msg05445.html
> 
> This patch add a new object netfilter, capture all network packets.
> Also implement a netbuffer based on this object.
> the "buffer" netfilter could be used by VM FT solutions like
> Macrocheckpointing, to buffer/release packets. Or to simulate
> packet delay.
> 
> Usage:
>  -netdev tap,id=bn0
>  -netfilter buffer,id=f0,netdev=bn0,interval=1000
>  -device e1000,netdev=bn0

What if I want to use multiple filters at once? Is there a way to
determine the order in which the filters are run through?

> dynamically add/remove netfilters:
>  netfilter_add buffer,id=f0,netdev=bn0,interval=1000
>  netfilter_del f0

Same here ... let's assume there are already two filters - can I
somehow add a third filter inbetween the two?

 Thomas