[OpenIndiana-discuss] CIFS Alias/Multiple connections

[John McEntee]

The thread I saw on opensolaris is here
http://opensolaris.org/jive/thread.jspa?threadID=139077&tstart=0

But the description is below.

I can't speak to why you don't see this problem with build 134, but I
believe it's covered by
7012679 Configurable bypass for vcnumber zero
which is fixed in build 162.

The problem is that when a client makes a connection to what it thinks is a
new server, the first thing that it does is to tell the server to shut down
any previous connections from that client, presumably to clean up anything
that might be left over from before a crash. In this case, that mechanism
kills the connection that was using the other alias.

It appears that Microsoft has realized that this is a problem with the
definition of the protocol, and has suggested a workaround: that there be
a configuration option that causes the server to ignore this special
cleanup request. We've implemented that workaround.

>From my perspective here deep in Development and far from the product
delivery process, I'm afraid I have absolutely no idea when or how a build
with this fix in place might be made available.



-----Original Message-----
From: Gordon Ross [mailto:gordon.w.ross at gmail.com] 
Sent: 21 October 2011 03:54
To: Discussion list for OpenIndiana
Subject: Re: [OpenIndiana-discuss] CIFS Alias/Multiple connections

Oh!  I might have a guess what this is - but your captures will verify.
You can also turn on debug logging.  I think you may see that the
"vc==0" feature is causing the new connection to kill the prior ones.


On Thu, Oct 20, 2011 at 6:13 PM, Jonathan Leafty
<jleafty+openindianadiscuss at gmail.com> wrote:
> No network captures yet, I was kind of waiting for the fqdn to be fixed as
I
> was thinking it was related.  I think I'll have time to do it this
weekend,
> I'll load Wireshark on a Windows 7 VM and report back.
>
> Also, I can open two different Explorer Windows (though if you quickly
> navigate against both you may notice it) with two different aliases, what
> matters is data transfer.  If I'm copying/reading data on alias1 and I
start
> another on alias2, alias1 gets disconnected.  Same with writes.  I can
> positively say, this never occurred with OS b129-134.  I first noticed it
in
> b134a, then Solaris 11 Express, and now OpenIndiana b151a.
>
> Its probably related to the various SMB changes with Windows 7/2K8 so I'll
> try to spin an XP VM up too (I don't have a physical XP box anymore)
>
> On Thu, Oct 20, 2011 at 11:31 AM, Gordon Ross
<gordon.w.ross at gmail.com>wrote:
>
>> On Thu, Oct 20, 2011 at 12:48 PM, Jonathan Leafty
>> <jleafty+openindianadiscuss at gmail.com> wrote:
>> > No they're just set up in DNS.  After b134 (any flavor, OpenSolaris,
>> Solaris
>> > 11 Express) it won't accept CIFS connections to DNS aliases.
>> >
>> > Windows 2008 is the same way, but you can flip a registry setting to
let
>> SMB
>> > Connections come in on DNS Aliases even if its not set as a SPN alias
>> (the
>> > more proper way).
>> >
>> > Which brings me to another problem.  I can't authenticate against the
>> actual
>> > AD SPN/Hostname, I get access denied.  But I believe I've seen a bug
>> report
>> > about it.  I can go to \\hostname, but not \\hostname.fqdn  if I had a
>> DNS
>> > alias as a SPN alias, it will do the same.  I haven't packet sniffed
yet,
>> as
>> > its not a huge issue and since there was a bug report.
>>
>> Yes, here's the issue for that:  https://www.illumos.org/issues/1087
>>  Unable to connect to the CIFS server using \\servername.fqdn
>> We have someone working on it.
>>
>> Perhaps your alias problem is related.
>>
>> Do you have network captures for the failure?
>> Is it the session setup that fails? Tree connect?
>>
>> Thanks,
>> Gordon
>>
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>> OpenIndiana-discuss at openindiana.org
>> http://openindiana.org/mailman/listinfo/openindiana-discuss
>>
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