Re: Raw access to block devices

[Roy S.C. Ho]

Hi Peter, thanks for your help. I found that the
control device is only for GETBIND or SETBIND. It
seems that the binded devices still have to be char
devices. Is there a way to change this?
Your help is much appreciated. Thanks.

--- "Peter T. Breuer" <[e-mail]> wrote:
> "A month of sundays ago Roy S.C. Ho wrote:"
> > I would like to write a driver for a block device
> that
> > is better to be accessed directly without going
> > through the buffer cache. I read the source code
> raw.c
> > and learnt that linux does have raw I/O support.
> > However, it seems to me that the support only
> provides
> > a character device interface to users. Is there a
> 
> I think that's the control device. You can work out
> how to use it
> by looking at the ioctls in raw.c. But, yes, sure,
> if you get some
> "official" news on how to work it, let me know too
> and I'll use the
> info like a shot!
> 
> > simple way to maintain the block device interface
> to
> > user programs / other parts of the kernel, while
> > bypassing the buffer cache system?
> 
> Peter
> -

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