Re: [Qemu-devel] [PATCH 00/12] For QEMU 2.5: Add a netfilter object and netbuffer filter

[Thomas Huth <thuth@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