Re: IMA: kernel reading files opened with O_DIRECT

Pavel Machek
2014-07-11T20:10:59Z

On Wed 2014-07-02 11:40:50, Christoph Hellwig wrote:
> On Wed, Jul 02, 2014 at 11:55:41AM -0400, Jeff Moyer wrote:
> > It's acceptable.
>
> It's not because it will then also affect other reads going on at the
> same time.
>
> The whole concept of ima is just broken, and if you want to do these
> sort of verification they need to happen inside the filesystem and not
> above it.

...and doing it at filesystem layer would also permit verification of
per-block (64KB? 1MB?) hashes. Reading entire iso image when I run
"file foo.iso" is anti-social..
Pavel
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