samba - Jan 2016 - Fwd: Change notify/Directory enumeration issue with two MAC OS X El Capitan accessing same folder

Hi Folks,

We are seeing an issues where two OS X El Capitan clients opened a folder
and one of them creates a "New Folder" (untitled folder) and renames
it, on
the other MAC client explorer the "unititled folder" remains same and
unable to access it.

Note: The samba version is 4.1.19 and we have not used the  vfs_fruit
module.

attached packet capture where the SMB2 Find responses are failing with
STATUS_OBJECT_NOT_FOUND for the find requests with "apple double"
search
pattern.

Please filter packets for  ip.addr == 192.168.200.171 and at last find
requests are having search pattern "._?" etc i.e "apple
double" after few
SMB2 notify responses.

So will this issues fixes by vfs_fruit module or  by latest SAMBA ?

Regards,
--Partha

On Fri, Jan 29, 2016 at 05:28:22PM -0800, Partha Sarathi
wrote:
> Hi Folks,
> 
> We are seeing an issues where two OS X El Capitan clients opened a folder
> and one of them creates a "New Folder" (untitled folder) and
renames it, on
> the other MAC client explorer the "unititled folder" remains same
and
> unable to access it.
> 
> Note: The samba version is 4.1.19 and we have not used the  vfs_fruit
> module.
> 
> attached packet capture where the SMB2 Find responses are failing with
> STATUS_OBJECT_NOT_FOUND for the find requests with "apple double"
search
> pattern.
> 
> Please filter packets for  ip.addr == 192.168.200.171 and at last find
> requests are having search pattern "._?" etc i.e "apple
double" after few
> SMB2 notify responses.
> 
> So will this issues fixes by vfs_fruit module or  by latest SAMBA ?
No attachment I'm afraid. Is the client watching
the directory getting a ChangeNotify reply after
the rename ?

The only way to determine if Ralph already fixed
this is to download master or v4.4 and give it
a local test.

This is the first report of problems so if you
can reproduce on master / 4.4 please log a bug
and we'll follow up.

Cheers,

	Jeremy.

Thanks Jeremy/Ralph, for the quick response.  Please see my in-line answers

On Sat, Jan 30, 2016 at 1:13 AM, Ralph Boehme <rb at sernet.de> wrote:
> Hi!
>
> On Sat, Jan 30, 2016 at 08:49:59AM +0100, Jeremy Allison wrote:
> > On Fri, Jan 29, 2016 at 05:28:22PM -0800, Partha Sarathi wrote:
> > > Hi Folks,
> > >
> > > We are seeing an issues where two OS X El Capitan clients opened
a
> folder
> > > and one of them creates a "New Folder" (untitled
folder) and renames
> it, on
> > > the other MAC client explorer the "unititled folder"
remains same and
> > > unable to access it.
> > >
> > > Note: The samba version is 4.1.19 and we have not used the 
vfs_fruit
> > > module.
> > >
> > > attached packet capture where the SMB2 Find responses are failing
with
> > > STATUS_OBJECT_NOT_FOUND for the find requests with "apple
double"
> search
> > > pattern.
> > >
> > > Please filter packets for  ip.addr == 192.168.200.171 and at last
find
> > > requests are having search pattern "._?" etc i.e
"apple double" after
> few
> > > SMB2 notify responses.
> > >
> > > So will this issues fixes by vfs_fruit module or  by latest SAMBA
?
> >
> > No attachment I'm afraid.
>
> it was attached in a resend.
>
> > Is the client watching the directory getting a ChangeNotify reply
> > after the rename ?
>
> Yes, the client is getting a proper ChangeNotify, from a quick check
> it looks like the server is behaving correctly.
>
> > The only way to determine if Ralph already fixed
> > this is to download master or v4.4 and give it
> > a local test.
>
> As he's not using fruit on his system and fruit doesn't deal with
> change notifies at all, if it's fixed in a later relase, I didn't
fix
> it. :)
>
> Anyway, Partha please test with a later release. If the problem
> persists, I'd check if you can reproduce the issue against a Windows
> server and if it works there, compare network traces bit by bit.
>

I tested against windows2k12R2 and it does not have this issue.

I will test against samba4.4 with/without fruit and will update my findings.
>
> Oh, and dropping samba-users list from cc.
>
> -Ralph
>
> --
> SerNet GmbH, Bahnhofsallee 1b, 37081 Göttingen
> phone: +49-551-370000-0, fax: +49-551-370000-9
> AG Göttingen, HRB 2816, GF: Dr. Johannes Loxen
> http://www.sernet.de,mailto:kontakt at sernet.de
>