Re: [PATCH 0/5] ext4/overlayfs: fiemap related fixes

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On Mon, Apr 27, 2020 at 01:15:22PM +0300, Amir Goldstein wrote:
> On Mon, Apr 27, 2020 at 9:28 AM Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:
> >
> > On Sat, Apr 25, 2020 at 01:49:43PM +0300, Amir Goldstein wrote:
> > > I would use as generic helper name generic_fiemap_checks()
> > > akin to generic_write_checks() and generic_remap_file_range_prep() =>
> > > generic_remap_checks().
> >
> > None of the other fiemap helpers use the redundant generic_ prefix.
> 
> Fine. I still don't like the name _validate() so much because it implies
> yes or no, not length truncating.
> 
> What's more, if we decide that FIEMAP_FLAG_SYNC handling should
> be done inside this generic helper, we would definitely need to rename it
> again. So how about going for something a bit more abstract like
> fiemap_prep() or whatever.

Ok, I'll rename it to fiemap_prep.

> 
> What is your take about FIEMAP_FLAG_SYNC handling btw?

Oh, I hadn't really noticed that mess.  Taking it into fiemap_prep
might make most sense, so that it nominally is under fs control for
e.g. locking purposes.



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