Re: Re: accessing the scsi disk from a kernel module

[Karthik Sarangan <karthiks@cdac.in>]

Fawad Lateef wrote:

>On 9/30/05, Karthik Sarangan <karthiks@cdac.in> wrote:
>  
>
>>what do I write in a kernel module for accessing a scsi disk device?
>>
>>    
>>
>
>What do u mean by this ??? Are you writing a driver for SCSI Disk or
>Want to do read/write on it using its own driver ??? For read/write
>using its own driver you can use/call generic_make_request (function
>from block/ll_rw_blk.c) from your kernel module to send requests to
>any block device available on the system and kernel will do the
>creating and sending request to correct block device whether that will
>be a SCSI disk or any disk .... And if you want directly to use the
>SCSI device then you have to make requests using SCSI protocol .....
>
>--
>Fawad Lateef
>
>  
>
I dont want the buffer cache of the block device interfering.

Basically I require to read/write data (without being cached or copied into
intermediate kernel buffers) to scsi disk from a kernel module.

Hope this make my meaning clearer.

Karthik Sarangan