samba - Mar 2025 - Samba 4.22 breaks Time Machine

Time Machine on macOS relies on fruit:posix_rename (in particular to rename the
.sparsebundle file). Samba 4.22 removed this feature, thus breaking Time
Machine.

Perhaps this feature could be restored (perhaps only on a per-share basis)?

I also think it should be restored, but perhaps disabled by default and a note
added to the man page for possible issues with Windows. There are Mac-only
environments where it could be enabled safely on all shares, not just Time
Machine.

> On 9. Mar 2025, at 6.14, jdistler-samba--- via samba <samba at
lists.samba.org> wrote:
> 
> Time Machine on macOS relies on fruit:posix_rename (in particular to rename
the .sparsebundle file). Samba 4.22 removed this feature, thus breaking Time
Machine.
> 
> Perhaps this feature could be restored (perhaps only on a per-share basis)?
> 
> 
> 
> 
> -- 
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On 3/9/25 5:14 AM, jdistler-samba--- via samba wrote:
> Time Machine on macOS relies on fruit:posix_rename (in particular to
> rename the .sparsebundle file). Samba 4.22 removed this feature,
> thus breaking Time Machine.
sorry, but this option was removed as a) it could result in data loss 
for Windows clients and b) it was putting a unbearable burden on 
development.

The correct fix for this would be getting Apple to implement and use 
SMB3 POSIX Extensions which would cover this case correctly.

Sorry!
-slow
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