SMB Share and failed write from macOS

Routers
1

Hi Team, read works, but write fails, I get this error in the logs

Wed May 29 16:14:00 2024 daemon.err smbd[14486]: [2024/05/29 16:14:00.472911, 0] ../../source3/modules/vfs_fruit.c:2576(fruit_pwrite_meta_netatalk)
Wed May 29 16:14:00 2024 daemon.err smbd[14486]: fruit_pwrite_meta_netatalk: ad_pwrite [pubkey.txt:AFP_AfpInfo] failed

Seems something related to extra metadata that macOS is trying to write ?
Any fix for this ?

GL-MT2500 with v4.5.16 firmware in bridged network mode.
USB Drive has exFAT filesystem.

2

exFAT does not support macOS metadata, I would assume this is the issue.

3

What filesystem do you suggest then ?
I have tested the USB stick on a Mac and no issues, I can write files.
Has the SMB server been tested from a Mac and if so what is the recommended setup in terms of filesystem, partition type, size, etc ?

I have reformatted the USB stick, reset the router firmware and setup Network Share again.
I get same error copying from Finder, but I also tested in commandline and it appeared to be working, but then at the end I get an error

could not copy extended attributes to /Volumes/shared/dvd.iso: Attribute not found

4

We have tested on Windows, iOS, Android, Linux (Ubuntu, etc.), and they all work ok.

Mac also based on Linux, but it depends on its Samba client with own developed codes: samba/source3/modules/vfs_fruit.c at master · samba-team/samba · GitHub

Probably 'vfs' compatibility not very well, please try:
go to GL router smb server configuration on command line, group 'global', add this one option (original is yes):

fruit:nfs_aces = no

(source: Creating a directory in Samba share from OSX client always has ACL "mask:r-x" - Unix & Linux Stack Exchange)

1 Like
5

Hi Bruce, I just check the file /etc/samba/smb.conf.template it has the following set by default;

    fruit:nfs_aces = no
    fruit:aapl = yes
    vfs objects = catia fruit streams_xattr

I find this file gets overwritten when setting up a samba share again. I edited the /var/etc/smb.conf file instead and re-started SMB service to test again with these settings;

    fruit:nfs_aces = yes
    fruit:aapl = yes
    vfs objects = catia fruit streams_xattr

Now I can create multiple folders in finder and that works, but copying files fails again in finder, creating a zero byte file.
The operation can’t be completed because an unexpected error occurred (error code -50).

Testing from command line on Mac to copy does copy the file, but again shows extended attributes error on completion.

6

Re-formatted the USB to ext4 and tested again, working as expected now.
Basically, can't user exFAT on Samba share to a Mac, exFAT does not support extended attributes (xattrs), which are needed for vfs_streams_xattr to function properly

1 Like