[OpenIndiana-discuss] CIFS Alias/Multiple connections

Fri Oct 21 19:43:13 UTC 2011

Was the message to me?

I would, you know assuming I'm capable of carrying out the fix :)  CIFS
going down isn't the end of the world, I can snapshot/create a boot
environment to revert anyways.

On Fri, Oct 21, 2011 at 12:40 PM, Gordon Ross <gordon.w.ross at gmail.com>wrote:

> I've been wanting to fix this for a while, but it rarely pops up.
> I just filed: https://www.illumos.org/issues/1676
>  Connections to CIFS service via DNS alias kills other sessions
>
> If I attach a proposed fix to that issue, could one of you test it?
>
> Thanks,
> Gordon
>
> On Fri, Oct 21, 2011 at 8:17 AM, John McEntee
> <jmcentee at stirling-dynamics.com> wrote:
> > 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
> >>>
> >>> _______________________________________________
> >>> OpenIndiana-discuss mailing list
> >>> OpenIndiana-discuss at openindiana.org
> >>> http://openindiana.org/mailman/listinfo/openindiana-discuss
> >>>
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