Re: UBIFS recovery truncates file to zero size

From: Artem Bityutskiy <dedekind@infradead.org>
To: Iram Shahzad <iram.shahzad@jp.fujitsu.com>
Cc: linux-mtd@lists.infradead.org
Subject: Re: UBIFS recovery truncates file to zero size
Date: Thu, 12 Mar 2009 13:08:42 +0200	[thread overview]
Message-ID: <1236856122.21691.1.camel@localhost.localdomain> (raw)
In-Reply-To: <B2B24529967640E8A501ADADDE1E9908@sky>

On Thu, 2009-03-12 at 17:49 +0900, Iram Shahzad wrote:
> >> For the write back enabled case, I was expecting the
> >> following behaviour:
> >>     power went down before the file is sync-ed, so
> >>     on the next booting the file will be in its old state,
> >>     that is it will contain the contents which it had before
> >>     this write.
> >> 
> >> But instead of being in the old state, it becomes empty file.
> >> Is this really expected(correct) behaviour?
> > 
> > No.  How were you updating the file?
> 
> The file is updated by a Java application in the following way.
> 
> -----
> FileOutputStream str = new FileOutputStream(aFilename);
> // some write here
> str.flush();
> str.close();
> -----

Please, check whether str.flush()/str.close() cause fsync()/sync().

-- 
Best regards,
Artem Bityutskiy (Битюцкий Артём)