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From: Eric Biggers <ebiggers@google.com>
To: Dave Chinner <david@fromorbit.com>
Cc: fstests@vger.kernel.org, linux-ext4@vger.kernel.org,
	"Theodore Y . Ts'o" <tytso@mit.edu>,
	Jaegeuk Kim <jaegeuk@kernel.org>,
	Richard Weinberger <richard@nod.at>,
	David Gstir <david@sigma-star.at>
Subject: Re: [PATCH 4/4] generic: test locking when setting encryption policy
Date: Mon, 21 Nov 2016 11:25:19 -0800	[thread overview]
Message-ID: <20161121192519.GE30672@google.com> (raw)
In-Reply-To: <20161120223536.GL28177@dastard>

On Mon, Nov 21, 2016 at 09:35:36AM +1100, Dave Chinner wrote:
> On Thu, Nov 17, 2016 at 11:47:07AM -0800, Eric Biggers wrote:
> > This test tries to reproduce (with a moderate chance of success on ext4)
> > a race condition where a file could be created in a directory
> > concurrently to an encryption policy being set on that directory,
> > causing the directory to become corrupted.
> 
> Why can't this be done with shell loops rather than requiring a
> helper application?
> 
> Cheers,
> 
> Dave.
> -- 
> Dave Chinner
> david@fromorbit.com

That's what I tried originally, but the race was too difficult to hit with the
overhead of execing a program for every mkdir and ioctl syscall.

Eric

  reply	other threads:[~2016-11-21 19:25 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-17 19:47 [PATCH 0/4] Add filesystem-level encryption tests Eric Biggers
2016-11-17 19:47 ` [PATCH 1/4] generic: add utilities for testing filesystem encryption Eric Biggers
2016-11-20 21:33   ` Dave Chinner
2016-11-21 18:40     ` Eric Biggers
2016-11-21 21:08       ` Dave Chinner
2016-11-17 19:47 ` [PATCH 2/4] generic: test setting and getting encryption policies Eric Biggers
2016-11-20 22:07   ` Dave Chinner
2016-11-21 19:11     ` Eric Biggers
2016-11-21 21:21       ` Dave Chinner
2016-11-17 19:47 ` [PATCH 3/4] generic: test encrypted file access Eric Biggers
2016-11-20 22:31   ` Dave Chinner
2016-11-21 19:23     ` Eric Biggers
2016-11-21 21:23       ` Dave Chinner
2016-11-17 19:47 ` [PATCH 4/4] generic: test locking when setting encryption policy Eric Biggers
2016-11-20 22:35   ` Dave Chinner
2016-11-21 19:25     ` Eric Biggers [this message]
2016-11-21 21:32       ` Dave Chinner
2016-11-21 23:41         ` Eric Biggers
2016-11-24 23:26           ` Dave Chinner

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