Re: [RFC PATCH] fs: Plumb case sensitivity bits into statx

[Gabriel Krisman Bertazi <gabriel@krisman.be>]

Chuck Lever <cel@kernel.org> writes:

> On 10/3/25 4:43 PM, Gabriel Krisman Bertazi wrote:
>> Chuck Lever <cel@kernel.org> writes:
>> 
>>> On 10/3/25 11:24 AM, Gabriel Krisman Bertazi wrote:
>
>>>> Does the protocol care about unicode version?  For userspace, it would
>>>> be very relevant to expose it, as well as other details such as
>>>> decomposition type.
>>>
>>> For the purposes of indicating case sensitivity and preservation, the
>>> NFS protocol does not currently care about unicode version.
>>>
>>> But this is a very flexible proposal right now. Please recommend what
>>> you'd like to see here. I hope I've given enough leeway that a unicode
>>> version could be provided for other API consumers.
>> 
>> But also, encoding version information is filesystem-wide, so it would
>> fit statfs.
>
> ext4 appears to have the ability to set the case folding behavior
> on each directory, that's why I started with statx.

Yes. casefold is set per directory, but the unicode version and
casefolding semantics used by those casefolded directories are defined
for the entire filesystem.

-- 
Gabriel Krisman Bertazi