Re: [PATCH 3/5] tests: don't use unix socket path that matches auto-generated path

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On 08/30/2017 02:45 PM, Pavel Hrdina wrote:
> On Wed, Aug 30, 2017 at 02:33:00PM +0200, Michal Privoznik wrote:
>> On 08/30/2017 01:40 PM, Pavel Hrdina wrote:
>>> The test was introduced by 60135b22db6d.
>>>
>>> The auto-generated path is removed by post-parse callback which
>>> also changes the mode from "connect" to "bind" since the auto-generated
>>> path makes sense only for "bind" mode.
>>>
>>> Signed-off-by: Pavel Hrdina <phrdina@xxxxxxxxxx>
>>> ---
>>>  tests/qemuxml2argvdata/qemuxml2argv-chardev-reconnect.args | 6 ++----
>>>  tests/qemuxml2argvdata/qemuxml2argv-chardev-reconnect.xml  | 4 ++--
>>>  2 files changed, 4 insertions(+), 6 deletions(-)
>>>
>>
>>> diff --git a/tests/qemuxml2argvdata/qemuxml2argv-chardev-reconnect.xml b/tests/qemuxml2argvdata/qemuxml2argv-chardev-reconnect.xml
>>> index e0664b2a95..41ee248db3 100644
>>> --- a/tests/qemuxml2argvdata/qemuxml2argv-chardev-reconnect.xml
>>> +++ b/tests/qemuxml2argvdata/qemuxml2argv-chardev-reconnect.xml
>>> @@ -18,7 +18,7 @@
>>>        </source>
>>>      </redirdev>
>>>      <smartcard mode='passthrough' type='unix'>
>>> -      <source mode='connect' path='/tmp/channel/domain-oldname/asdf'>
>>> +      <source mode='connect' path='/tmp/channel/asdf'>
>>>          <reconnect enabled='yes' timeout='20'/>
>>>        </source>
>>>      </smartcard>
>>> @@ -29,7 +29,7 @@
>>>        <target type='virtio' name='asdf'/>
>>>      </channel>
>>>      <channel type='unix'>
>>> -      <source mode='connect' path='/tmp/channel/domain-oldname/fdsa'>
>>> +      <source mode='connect' path='/tmp/channel/fdsa'>
>>>          <reconnect enabled='no'/>
>>>        </source>
>>>        <target type='virtio' name='fdsa'/>
>>>
>>
>> This looks like it's fixing just a symptom not the cause. What if I have
>> a domain that has autogenerated path and I also set reconnect?
> 
> If you try to define a domain with this configuration the post-parse
> callback removes the path, see qemuDomainChrDefDropDefaultPath().  When
> the guest is started there is another function,
> see qemuDomainPrepareChannel(), where we generate a path in one is
> missing and also changes the mode to "bind".
> 
> So yes, this fixes the symptom but it's still a valid fix because the
> test XML is invalid, you should not use this generated path.

Ah, right. You really want to fix just the test here.

ACK then and safe for the freeze.

Michal

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