[Bug debuginfod/30221] Negative cache should differentiate failure types

[vi at endrift dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30221

--- Comment #5 from Vicki Pfau <vi at endrift dot com> ---
I have a proof of concept patch that I can attach here or submit to the mailing
list if you think the xattrs approach is a good way to go. Alternatively, a
metadata directory could be added under each buildid for per-file info, which
would work in the absence of functional xattrs, but be slightly more
complex.(In reply to Frank Ch. Eigler from comment #4)
> (In reply to Vicki Pfau from comment #3)
> > I have a proof of concept patch that I can attach here or submit to the
> > mailing list if you think the xattrs approach is a good way to go.
> > Alternatively, a metadata directory could be added under each buildid for
> > per-file info, which would work in the absence of functional xattrs, but be
> > slightly more complex.
> 
> Have you considered the idea of encoding the retention deadline in the
> boring inode mtime or ctime?

I did, and in comment 2 I already explained why I think it's a bad idea.

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