samba - Nov 2017 - Error copying files with extended attributes to Windows clients

When copying files to a Windows 10 client, an error is thrown if the
file has extended attributes. In this case, the files were all created
by an OS X client with netatalk.

I'm using Samba from the Ubuntu 16.04 repository, which is currently
4.3.11+dfsg-0ubuntu0.16.04.11.

In my smb.conf:

# Netatalk configuration
vfs objects = catia fruit streams_xattr
fruit:encoding = native
streams_xattr:store_stream_type = no
streams_xattr:prefix = user.

ea support = Yes

Windows Explorer initially copies the file data, but throws "Element not
found" at the end.

On the server:

[2017/10/01 10:10:09.695888,  0] ../source3/smbd/open.c:1202(open_file)
  Error doing fstat on open file Ekahau
  Heatmapper-Setup.exe:com.apple.metadata"kMDItemWhereFroms (No data
  available)

$ getfattr Ekahau\ Heatmapper-Setup.exe
# file: Ekahau Heatmapper-Setup.exe
user.com.apple.metadata:kMDItemDownloadedDate
user.com.apple.metadata:kMDItemWhereFroms
user.com.apple.quarantine
user.org.netatalk.Metadata

If I remove the extended attributes, or turn off 'ea support', I can
copy the file as expected. Is this expected? I assumed that either
extended attributes would be copied to the client, or they would be
removed automatically if they aren't. Or, is this just a Windows 10 bug?

Thanks,

-- 
  Andrew Berry

On Sun, Oct 01, 2017 at 10:18:00AM -0400, Andrew Berry via samba
wrote:
> When copying files to a Windows 10 client, an error is thrown if the
> file has extended attributes. In this case, the files were all created
> by an OS X client with netatalk.
> 
> I'm using Samba from the Ubuntu 16.04 repository, which is currently
> 4.3.11+dfsg-0ubuntu0.16.04.11.
> 
> In my smb.conf:
> 
> # Netatalk configuration
> vfs objects = catia fruit streams_xattr
> fruit:encoding = native
> streams_xattr:store_stream_type = no
> streams_xattr:prefix = user.
this combination is not use much, so there's a good chance there's a bug
somewhere.

Can you test with a later release please? There's a chance that it might
work
there. If not, please file a bugreport so we can track this.

-slow

-- 
Ralph Boehme, Samba Team       https://samba.org/
Samba Developer, SerNet GmbH   https://sernet.de/en/samba/

I just upgraded to 4.7.1 to fix an unrelated bug with deleting
directories for OS X clients, and it looks like this bug has been fixed
too. I re-enabled ea support, and copies work. It does look like some
attrs are lost in the process, but that's probably because they are
larger than some NTFS limit?

 getfattr vlc-2.2.2.dmg
# file: vlc-2.2.2.dmg
user.com.apple.diskimages.fsck
user.com.apple.diskimages.recentcksum
user.com.apple.metadata:kMDItemDownloadedDate
user.com.apple.metadata:kMDItemWhereFroms
user.com.apple.quarantine
user.org.netatalk.Metadata

# Copied the file off the share and back with Windows 10 Explorer

$ getfattr vlc-2.2.2-copied.dmg
# file: vlc-2.2.2-copied.dmg
user.COM.APPLE.DISKIMAGES.FSCK
user.COM.APPLE.DISKIMAGES.RECENTCKSUM
user.COM.APPLE.QUARANTINE
user.ORG.NETATALK.METADATA

-- 
  Andrew Berry

On Sun, Nov 5, 2017, at 07:01 AM, Andrew Berry wrote:
> I just upgraded to 4.7.1 to fix an unrelated bug with deleting
> directories for OS X clients, and it looks like this bug has been fixed
> too. I re-enabled ea support, and copies work. It does look like some
> attrs are lost in the process, but that's probably because they are
> larger than some NTFS limit?
> 
>  getfattr vlc-2.2.2.dmg
> # file: vlc-2.2.2.dmg
> user.com.apple.diskimages.fsck
> user.com.apple.diskimages.recentcksum
> user.com.apple.metadata:kMDItemDownloadedDate
> user.com.apple.metadata:kMDItemWhereFroms
> user.com.apple.quarantine
> user.org.netatalk.Metadata
> 
> # Copied the file off the share and back with Windows 10 Explorer
> 
> $ getfattr vlc-2.2.2-copied.dmg
> # file: vlc-2.2.2-copied.dmg
> user.COM.APPLE.DISKIMAGES.FSCK
> user.COM.APPLE.DISKIMAGES.RECENTCKSUM
> user.COM.APPLE.QUARANTINE
> user.ORG.NETATALK.METADATA
> 
> -- 
>   Andrew Berry
> 
> On Sun, Nov 5, 2017, at 04:15 AM, Ralph Böhme wrote:
> > On Sun, Oct 01, 2017 at 10:18:00AM -0400, Andrew Berry via samba
wrote:
> > > When copying files to a Windows 10 client, an error is thrown if
the
> > > file has extended attributes. In this case, the files were all
created
> > > by an OS X client with netatalk.
> > > 
> > > I'm using Samba from the Ubuntu 16.04 repository, which is
currently
> > > 4.3.11+dfsg-0ubuntu0.16.04.11.
> > > 
> > > In my smb.conf:
> > > 
> > > # Netatalk configuration
> > > vfs objects = catia fruit streams_xattr
> > > fruit:encoding = native
> > > streams_xattr:store_stream_type = no
> > > streams_xattr:prefix = user.
> > 
> > this combination is not use much, so there's a good chance
there's a bug
> > somewhere.
> > 
> > Can you test with a later release please? There's a chance that it
might
> > work
> > there. If not, please file a bugreport so we can track this.
> > 
> > -slow
> > 
> > -- 
> > Ralph Boehme, Samba Team       https://samba.org/
> > Samba Developer, SerNet GmbH   https://sernet.de/en/samba/

On Sun, Nov 05, 2017 at 07:03:28AM -0500, Andrew Berry
wrote:
> I just upgraded to 4.7.1 to fix an unrelated bug with deleting
> directories for OS X clients, and it looks like this bug has been fixed
> too. I re-enabled ea support, and copies work. It does look like some
> attrs are lost in the process, but that's probably because they are
> larger than some NTFS limit?
> 
>  getfattr vlc-2.2.2.dmg
> # file: vlc-2.2.2.dmg
> user.com.apple.diskimages.fsck
> user.com.apple.diskimages.recentcksum
> user.com.apple.metadata:kMDItemDownloadedDate
> user.com.apple.metadata:kMDItemWhereFroms
> user.com.apple.quarantine
> user.org.netatalk.Metadata
> 
> # Copied the file off the share and back with Windows 10 Explorer
> 
> $ getfattr vlc-2.2.2-copied.dmg
> # file: vlc-2.2.2-copied.dmg
> user.COM.APPLE.DISKIMAGES.FSCK
> user.COM.APPLE.DISKIMAGES.RECENTCKSUM
> user.COM.APPLE.QUARANTINE
> user.ORG.NETATALK.METADATA
looks like it's now silently skipping xattrs with a colon in their name
instead
of erroring out.

Also, why on earth are the parts of the xattr names after the user namespace
prefix all uppercased?

-slow

-- 
Ralph Boehme, Samba Team       https://samba.org/
Samba Developer, SerNet GmbH   https://sernet.de/en/samba/