samba - Jun 2020 - Extended attributes not working on mac

I worked with Netatalk for years and want to switch to Samba now. Currently i
use Ubuntu 20.04. and Debian 9 before, i had no issues with netatalk at all.
As soon as i try to add a color tag (e.g. yellow) with Mac OS 10.15.5, the tag
appears shortly but hides one second later. The file system is ZFS with no
special options configured.

I tried the Ubuntu package but also the builds from source (4.12.1, 4.12.2,
4.12.3). Every attempt failed, i also tried every configuration combination
which made sense to me. Finally i spent days with figuring out the problem but i
have no glue at all.

The current config is basically the example from
https://wiki.samba.org/index.php/Configure_Samba_to_Work_Better_with_Mac_OS_X:

[Global]
min protocol = SMB2
vfs objects = catia fruit streams_xattr
fruit:metadata = stream
fruit:model = MacSamba
fruit:posix_rename = yes
fruit:veto_appledouble = no
fruit:wipe_intentionally_left_blank_rfork = yes
fruit:delete_empty_adfiles = yes

[Buchhaltung]
vfs objects = catia fruit streams_xattr
path = /home/buchhaltung
read only = No
valid users = martin

---------------------------------------------------------

Maybe it is related to the xattr binary (also tried different versions) which
tells me a unicode issue:
Traceback (most recent call last):
  File "/usr/local/bin/xattr", line 11, in <module>
    load_entry_point('xattr==0.9.7', 'console_scripts',
'xattr')()
  File
"/usr/local/lib/python3.8/dist-packages/xattr-0.9.7-py3.8-linux-x86_64.egg/xattr/tool.py",
line 196, in main
    attr_value = attr_value.decode('utf-8')
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x9a in position
33: invalid start byte

Please help - thank you in advance!
Martin

I changed the configuration and raised the log level, in my opion samba tries to
access the non existent double files.
Samba is now probably writing the data in a netatalk compliant way in the
extended attributes of the file but is not reading it.

new configuration:

[Global]
min protocol = SMB2
vfs objects = catia fruit streams_xattr
fruit:metadata = stream
fruit:resource = stream
fruit:encoding = native
fruit:model = MacSamba
fruit:posix_rename = yes
fruit:veto_appledouble = no
fruit:wipe_intentionally_left_blank_rfork = yes
fruit:delete_empty_adfiles = yes
streams_xattr:prefix = 
streams_xattr:store_stream_type = no
dos charset = CP932
log level = 3 vfs:5

[Buchhaltung]
vfs objects = catia fruit streams_xattr
path = /home/buchhaltung
read only = No
valid users = martin
fruit:resource = stream
fruit:metadata = stream
fruit:encoding = native
streams_xattr:prefix = 
streams_xattr:store_stream_type = no

------------------------------------------

Xattr binary is not working, so i used attr:

attr -g "com.apple.metadata:_kMDItemUserTags" test.numbers
Attribute "com.apple.metadata:_kMDItemUserTags" had a 54 byte value
for test.numbers:
bplist00?XOrange
7

------------------------------------------

xattr on my mac tells nothing, but when i try i get the following error in the
samba log on the ubuntu server:

[2020/05/30 19:54:27.887673,  3]
../../source3/smbd/smb2_server.c:3264(smbd_smb2_request_error_ex)
 smbd_smb2_request_error_ex: smbd_smb2_request_error_ex: idx[5]
status[NT_STATUS_NO_SUCH_FILE] || at
../../source3/smbd/smb2_query_directory.c:159

I?m not sure if this is related, but there was a regression a while back in
handling resource forks in folder icons. It was supposed to be fixed in 4.10.13
but I don?t think it quite works yet and I haven?t had the time to test it
further yet.

-Perttu
> On 30 May 2020, at 21.00, Martin Steiner / 3MF GmbH via samba <samba at
lists.samba.org> wrote:
> 
> I changed the configuration and raised the log level, in my opion samba
tries to access the non existent double files.
> Samba is now probably writing the data in a netatalk compliant way in the
extended attributes of the file but is not reading it.
> 
> new configuration:
> 
> [Global]
> min protocol = SMB2
> vfs objects = catia fruit streams_xattr
> fruit:metadata = stream
> fruit:resource = stream
> fruit:encoding = native
> fruit:model = MacSamba
> fruit:posix_rename = yes
> fruit:veto_appledouble = no
> fruit:wipe_intentionally_left_blank_rfork = yes
> fruit:delete_empty_adfiles = yes
> streams_xattr:prefix = 
> streams_xattr:store_stream_type = no
> dos charset = CP932
> log level = 3 vfs:5
> 
> [Buchhaltung]
> vfs objects = catia fruit streams_xattr
> path = /home/buchhaltung
> read only = No
> valid users = martin
> fruit:resource = stream
> fruit:metadata = stream
> fruit:encoding = native
> streams_xattr:prefix = 
> streams_xattr:store_stream_type = no
> 
> ------------------------------------------
> 
> Xattr binary is not working, so i used attr:
> 
> attr -g "com.apple.metadata:_kMDItemUserTags" test.numbers
> Attribute "com.apple.metadata:_kMDItemUserTags" had a 54 byte
value for test.numbers:
> bplist00?XOrange
> 7
> 
> ------------------------------------------
> 
> xattr on my mac tells nothing, but when i try i get the following error in
the samba log on the ubuntu server:
> 
> [2020/05/30 19:54:27.887673,  3]
../../source3/smbd/smb2_server.c:3264(smbd_smb2_request_error_ex)
> smbd_smb2_request_error_ex: smbd_smb2_request_error_ex: idx[5]
status[NT_STATUS_NO_SUCH_FILE] || at
../../source3/smbd/smb2_query_directory.c:159
> 
> -- 
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> instructions:  https://lists.samba.org/mailman/options/samba

Am 5/30/20 um 8:00 PM schrieb Martin Steiner / 3MF GmbH via
samba:
> I changed the configuration and raised the log level, in my opion samba
tries to access the non existent double files.
> Samba is now probably writing the data in a netatalk compliant way in the
extended attributes of the file but is not reading it.
> 
> new configuration:
> 
> [Global]
> min protocol = SMB2
> vfs objects = catia fruit streams_xattr
> fruit:metadata = stream
> fruit:resource = stream
this last line is long, remove it. Cf man vfs_fruit.

-slow

-- 
Ralph Boehme, Samba Team                https://samba.org/
Samba Developer, SerNet GmbH   https://sernet.de/en/samba/
GPG-Fingerprint   FAE2C6088A24252051C559E4AA1E9B7126399E46

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