From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wolfgang Denk <wd@denx.de>
Date: Tue, 28 May 2013 23:01:09 +0200
Subject: [U-Boot] dfu: dfu and UBI Volumes
In-Reply-To: <20130528172309.GF5829@bill-the-cat>
References: <20130527090254.5071e4fd@amdc308.digital.local>
	<7E1B5EF8-454B-4AD4-A49F-D5752EA7036C@antoniou-consulting.com>
	<20130527204127.GY17119@bill-the-cat>
	<20130527212552.C08F2380E6A@gemini.denx.de>
	<20130527233735.GZ17119@bill-the-cat>
	<20130528055046.4258C38116A@gemini.denx.de>
	<20130528150159.GC5829@bill-the-cat>
	<53FA5D9D-DA5D-409C-A262-0427569C250C@antoniou-consulting.com>
	<1905526685.1261642.1369758701313.JavaMail.root@advansee.com>
	<20130528172309.GF5829@bill-the-cat>
Message-ID: <20130528210109.1CC2B3831A2@gemini.denx.de>
List-Id: <u-boot.lists.denx.de>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
To: u-boot@lists.denx.de

Dear Tom,

In message <20130528172309.GF5829@bill-the-cat> you wrote:
> 
> > Of course this can't yet apply to writing files on file systems since the
> > current API in U-Boot misses the append feature, but this could be applied to
> > program raw memory partitions, including UBI images.
>
> Correct.  We can write a whole UBI image, today, of NAND size,
> regardless of DDR size.  But modifying UBI volumes (so UBIFS or your

I don't think so.  To write a UBI volume on an existing UBI device,
you would use the "ubi write" command.  This translates into a call of
ubi_volume_write(char *volume, void *buf, size_t size)  which means
the size must be known before you start writing; as far as I can tell
ubi_volume_write() does not support incremental write operations of
individual "parts" of a volume.


Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Its always easier short term to pee in the pond
than install a toilet - it's just not a good long term plan.
          - Alan Cox in <20100101145701.6432e7b7@lxorguk.ukuu.org.uk>