From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41206) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aQB0U-0002zZ-1A for qemu-devel@nongnu.org; Mon, 01 Feb 2016 04:42:54 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aQB0Q-00012A-Qq for qemu-devel@nongnu.org; Mon, 01 Feb 2016 04:42:49 -0500 Received: from [59.151.112.132] (port=3088 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aQB0Q-0000zD-6C for qemu-devel@nongnu.org; Mon, 01 Feb 2016 04:42:46 -0500 References: <1453862428-25570-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> <56A9AAC8.4010803@redhat.com> <56AAC2A2.9020204@cn.fujitsu.com> <56AEC986.2000500@redhat.com> <56AF0E35.8000905@cn.fujitsu.com> <20160201091156.GB2486@work-vm> From: Li Zhijian Message-ID: <56AF288C.4000108@cn.fujitsu.com> Date: Mon, 1 Feb 2016 17:42:36 +0800 MIME-Version: 1.0 In-Reply-To: <20160201091156.GB2486@work-vm> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: [Qemu-devel] [PATCH V2] net/traffic-mirror:Add traffic-mirror List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Dr. David Alan Gilbert" Cc: zhanghailiang , Zhang Chen , Gui jianfeng , Jason Wang , "eddie.dong" , qemu devel , Yang Hongyang On 02/01/2016 05:11 PM, Dr. David Alan Gilbert wrote: > * Li Zhijian (lizhijian@cn.fujitsu.com) wrote: >> >> >> On 02/01/2016 10:57 AM, Jason Wang wrote: >>> >>> >>> On 01/29/2016 09:38 AM, Li Zhijian wrote: >>>> >>>> >>>> On 01/28/2016 01:44 PM, Jason Wang wrote: >>>>> >>>>> >>>>> On 01/27/2016 10:40 AM, Zhang Chen wrote: >>>>>> From: ZhangChen >>>>>> >>>>>> Traffic-mirror is a netfilter plugin. >>>>>> It gives qemu the ability to copy and mirror guest's >>>>>> net packet. we output packet to chardev. >>>>>> >>>>>> usage: >>>>>> >>>>>> -netdev tap,id=hn0 >>>>>> -chardev socket,id=mirror0,host=ip_primary,port=X,server,nowait >>>>>> -traffic-mirror,id=m0,netdev=hn0,queue=tx/rx/all,outdev=mirror0 >>>>>> >>>>>> Signed-off-by: ZhangChen >>>>>> Signed-off-by: Wen Congyang >>>>>> Reviewed-by: Yang Hongyang >>>>> >>>>> Thanks for the patch. Several questions: >>>>> >>>>> - I'm curious about how the patch was tested? Simple setup e.g: >>>>> >>>>> -netdev tap,id=hn0 -device virtio-net-pci,netdev=hn0 -chardev >>>>> socket,id=c0,host=localhost,port=4444,server,nowait -object >>>>> traffic-mirror,netdev=hn0,outdev=c0,id=f0 -netdev >>>>> socket,id=s0,connect=127.0.0.1:4444 -device e1000,netdev=s0 >>>>> >> >> a strange thing is about "host=localhost", connection is refused at SUSE 11.3 but >> connection is connected successfully at Ubuntu 15.10 if i launch qemu with the >> command line above. >> I try to launch qemu at three physical machines installed with SUSE 11.3, they all >> connect failed. But when I specified "host=127.0.0.1", the connection is OK. >> >> I have comfirmed that: >> - "localhost have pointed to 127.0.0.1 if I "ping localhost" at SUSE >> - "telnet localhost 4444" works at SUSE > > My guess is that it's IPv6 related; check the /etc/hosts so see if there's > a ::1 entry for localhost; I've seen some weird behaviour on rhel in the > same way but in other uses. Thank you Dave, As you said, there are 2 entry record (ipv4 and ipv6) for "localhost" at my /etc/hosts after removing the ipv6 entry, the whole world become fine ^_^ Thanks Li Zhijian > > Dave > >> >>>>> does not works for me. >>>> Hi， Jason >>>> >>>> I just test the mirror using the command line above, it don't work too. >>>> I am looking to it, and find that seems because the -net socket >>>> problem that >>>> I have ever post a patch try to fix（refer to ↓） >>>> [Qemu-devel] [PATCH] report a error message if -net socket can not >>>> connect to server >>>> https://lists.gnu.org/archive/html/qemu-devel/2015-12/msg00758.html >>> >>> Will have a look at this. >>> >>>> >>>> after applying this patch, the qemu monitor tell me following message: >>>> (qemu) qemu-system-x86_64: net socket is not connected Connection refused >>> >>> Maybe two issues. Have you tired to start the mirror on one VM and then >>> using socket backend to connect it from another VM? >> >> Yes, if i connect the mirror on VM1 using socket backend from another VM2, the connection >> is established successfully. But on VM2 guest, I can't dump any packet using 'tcpdump' >> That's because in current version code, mirror is not compatible with socket backend and >> we will fix it in next version. >> >> >> Best regards. >> Li Zhijian >> >>> >>>> >>>> >>>> Thanks >>>> Li Zhijian >>>> >>>> >>>> >>> >>> >>> >>> . >>> >> >> > -- > Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK > > > . > -- Best regards. Li Zhijian (8555)