Re: [PATCH v3 2/3] fs: fuse: add backing_files control file

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On Fri, 9 May 2025 at 17:11, Chen Linxuan <chenlinxuan@xxxxxxxxxxxxx> wrote:
>
> On Fri, May 9, 2025 at 10:59 PM Miklos Szeredi <miklos@xxxxxxxxxx> wrote:
>
> > And that has limitations, since fdinfo lacks a hierarchy.  E.g.
> > recursively retrieving "hidden files" info is impractical.
>
> What does "recursively" refer to in this context?
> I am not entirely sure what kind of situation it implies.
> Do you mean, for example, when a fixed file is a FUSE fd and it has a
> backing file?

Yeah.  I don't see any practical relevance today, but allowing to
retrieve any attribute of these hidden files (fdinfo and hidden files
included) is a good thing that the flat nature of the current fdinfo
inteface makes difficult.

I'd argue that many current uses of fdinfo could be enabled with the
listxattr/getxattr inteface and would improve usablility (no need to
parse the fdinfo file to skip unneeded info).

Thanks,
Miklos
>
> Thanks,
> Chen Linxuan





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