i am not talking about any specific type of device driver.
What i want is a generic framework which can help me implementing any driver as a stack of modules (each module implementing a subset of complete functionality of driver), and ablility to insert and remove modules without doing any code change in rest of modules.
pankaj
On 4/11/06, Ming Zhang <mingz@xxxxxxxxxxx> wrote:
if u are talking about block device. then go and check device mapper.
ming
On Tue, 2006-04-11 at 14:54 +0530, Pankaj Chauhan wrote:
>
> hi all,
>
> Is there any framework available in linux kernel
> (2.6.x) to stack the modules (or device drivers to be
> specific). what i want is NETFILTER (which is
> available for network stack) kind of frame work for
> device drivers.
>
> Lets say i have a driver d1 for device D, d1
> implements very basic funtionality like configuration,
> read and write to device D. now i want some more
> complex funtions such as compression or encryption of
> data that is written to D, so i want that i write a
> driver d2 which sits on top of d1 and implement new
> funtionality. so we have a picture like
>
> d2 (compression / encryption)
> |
> d1 (basic functions)
> |
> D (device)
>
> I understand that it is possible to implement this
> stacking by code changes in d1 and d2, but tomorrow if
> i want to insert another funtionality implemented as
> d3 which should go between d2 and d1, i do'nt want to
> do any code changes to d1 and d2, i want that there
> should be a framework which allows me to implement
> this stacking without any code change in my driver.
>
> Thanks in advance.
>
> Pankaj Chauhan
>
>
>
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