From: Dmitry Kasatkin <dmitry.kasatkin@gmail.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: Christoph Hellwig <hch@infradead.org>,
Jeff Moyer <jmoyer@redhat.com>,
Dmitry Kasatkin <d.kasatkin@samsung.com>,
linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
akpm@linux-foundation.org, Al Viro <viro@zeniv.linux.org.uk>,
Mimi Zohar <zohar@linux.vnet.ibm.com>,
linux-security-module <linux-security-module@vger.kernel.org>,
Greg KH <gregkh@linuxfoundation.org>
Subject: Re: IMA: kernel reading files opened with O_DIRECT
Date: Sat, 12 Jul 2014 01:22:04 +0300 [thread overview]
Message-ID: <CACE9dm8TW1+7bq6hJiOmoAw+w+ZD8Ma=Sf6a5ZM2HZ5X1Lcifw@mail.gmail.com> (raw)
In-Reply-To: <20140711201054.GB18033@amd.pavel.ucw.cz>
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
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next prev parent reply other threads:[~2014-07-11 22:22 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-02 9:40 Dmitry Kasatkin
2014-07-02 15:55 ` Jeff Moyer
2014-07-02 18:12 ` Dmitry Kasatkin
2014-07-02 18:40 ` Christoph Hellwig
2014-07-02 18:45 ` Jeff Moyer
2014-07-02 19:07 ` Dmitry Kasatkin
2014-07-11 20:10 ` Pavel Machek
2014-07-11 22:22 ` Dmitry Kasatkin [this message]
2014-07-15 13:03 ` Pavel Machek
2014-07-16 12:48 ` Mimi Zohar
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