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From: Li Zhijian <lizhijian@cn.fujitsu.com>
Message-ID: <56DFA5FE.8030503@cn.fujitsu.com>
Date: Wed, 9 Mar 2016 12:26:38 +0800
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Subject: Re: [Qemu-devel] [PULL 00/14] Net patches
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To: Wen Congyang <wency@cn.fujitsu.com>, Peter Maydell <peter.maydell@linaro.org>, Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
Cc: Jason Wang <jasowang@redhat.com>, QEMU Developers <qemu-devel@nongnu.org>



On 03/09/2016 09:36 AM, Wen Congyang wrote:
> On 03/08/2016 05:54 PM, Peter Maydell wrote:
>> On 8 March 2016 at 16:06, Zhang Chen <zhangchen.fnst@cn.fujitsu.com> wrote:
>>> I found the reason for this problem is that
>>> unix_connect() have not connect to sock_path before iov_send().
>>> It need time to establish connection. so can we fix it with usleep()
>>> like this:
>>>
>>>      recv_sock = unix_connect(sock_path, NULL);
>>>      g_assert_cmpint(recv_sock, !=, -1);
>>> +    usleep(1000);
>>>
>>>      ret = iov_send(send_sock[0], iov, 2, 0, sizeof(size) +
>>> sizeof(send_buf));
>>>      g_assert_cmpint(ret, ==, sizeof(send_buf) + sizeof(size));
>>>      close(send_sock[0]);
>>>
>>>      ret = qemu_recv(recv_sock, &len, sizeof(len), 0);
>>
>> I would prefer it if we could find a way to fix this race
>> reliably rather than just inserting a delay and hoping it
>> is sufficient. Otherwise the test is likely to be unreliable
>> if run on a heavily loaded or slow machine.
>
> Yes, but there is no way to know when tcp_chr_accept() is called. Add a event
> to notify it?
>
> Thanks
> Wen Congyang
>

Hi, Jason, PMM
As Congyang said that this is a bug of testcase instead of filter-mirror.
Maybe we should re-wrok the testcase, for example
- using -chardev pipe instead of -chardev socket, because we are
   intend to test the packet mirror fuction instead of -chardev socket

How about that ?


>>
>> thanks
>> -- PMM
>>
>>
>>
>
>
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>
>