Re: IMA: kernel reading files opened with O_DIRECT

Dmitry Kasatkin
2014-07-11T22:22:10Z

On 11 July 2014 23:10, Pavel Machek <pavel@ucw.cz> wrote:
> 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.

Please design one single and the best universal filesystem which does it.

> Reading entire iso image when I run
> "file foo.iso" is anti-social..
> Pavel

Please make the policy which does not make anti-social.

It is all about use-case.

- Dmitry

> --
> (english) http://www.livejournal.com/~pavelmachek
> (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html