Re: set blksize of block device

[Lei Yang <lya755@ece.northwestern.edu>]

Denis Vlasenko wrote:

>On Thursday 28 October 2004 05:25, Lei Yang wrote:
>  
>
>>Or in other words, is there generic routines for block devices such that 
>>we could:
>>
>>get (set) block size of a block device;
>>read an existing block (e.g. block 4);
>>write an existing block (e.g. block 5);
>>    
>>
>
>Can you stick to "reply below quote" style please?
>  
>
OK

>  
>
>>>If nobody could answer this question, what about another one? Is there 
>>>a system call or a kernel interface that would allow me to write a 
>>>      
>>>
>
>Can you use read, write and seek system calls?
>--
>vda
>
>
>  
>
Not really, as I've explained, I want to do all these stuff in kernel 
space. More specifically, I want to write a newbie kernel module. In 
this module, I'll do something with a raw block device (with no 
filesystem). For example, I want to do block I/O operations on ramdisk, 
and I want to set the block size of ramdisk to whatever value I want 
(power of 2 of course).

Any comments?

Thanks,
Lei