[PATCH] smb/server: check destination is open when renaming

[Ralph Boehme]

For POSIX the relevant piece is POSIX-FSA 2.1.4.2 "Server Requests 
Closing an Open".

The important nuance being treating "POSIX opens" different from 
non-POSIX opens, basically:

- allow rename if there are only other POSIX opens
- fail the rename if there's one or more non-POSIX opens

For SMB3 POSIX we're not planning to use FileRenameInformationEx, as 
there's no need for it, the above piece of the spec nicely achieves the 
desired behaviour.

Cheers!
-slow


On 8/4/26 10:28 AM, ChenXiaoSong wrote:
> According to MS-FSA 2.1.5.15.12, level 10 (FileRenameInformation), an 
> overwrite rename must fail with STATUS_ACCESS_DENIED if the existing 
> target still has an open.
> 
> MS-FSA 2.1.5.15.12 FileRenameInformation: https://learn.microsoft.com/ 
> en-us/openspecs/windows_protocols/ms- 
> fsa/87f86c9b-6c2a-4803-84b7-131a74a434fa
> 
> On 8/4/26 15:53, Namjae Jeon wrote:
>> Okay. We can implement this in ksmbd and cifs.ko to pass generic/035 
>> test.
>>
>> Thanks for sharing it.
> 

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