Re: [RFC] ubi: tmp hack for lstat

[Artem Bityutskiy <dedekind@infradead.org>]

On Sun, 2008-10-19 at 15:21 +0200, Sebastian Andrzej Siewior wrote:
> lstat() on /dev/ubi%d_%d returns 0 in the st_size field. This hack
> allows to get the correct file size (as long as nobody updates the volume
> in the meantime).
> 
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
> ---
> I have userpsace programs which stat() the file and process the
> returned number bytes. The other work around is to copy the file
> somewhere and use this file instead of /dev/ubi.
> Artem, do you thing it is possible to implement this functionality
> properly or would it be reasonable not to use stat() at all on ubi
> volumes?

Hi,

I've tried to stat various files in my /dev/ and all of them have size
0. Why UBI should be different? Indeed, stat should return size of the
inode, that is normal semantics. You suggest making stat on UBI volume
character devices return volume size. It might help your application,
but it'll confuse other applications - for example 'du', which uses stat
to calculate directory size. So am not sure it is good idea.

-- 
Best regards,
Artem Bityutskiy (Битюцкий Артём)