Re: how to acheive the synchronization in between the How to acheive the synchronization between existing driver and new kernel module.


sudip05@xxxxxxxxxxxx wrote:
Nutty wrote:
Hello to all !!!!

I m working on the Hard disk drive on the linux - 2.4.20. I would like
to do raw read and write form the Hard disk. For that i have written
the small kernel module. My existing block driver is there. But now the
main concern is how to acheive the synchronization in between the
existing driver and my new kernel module.
Like all other applications accessing the sector for read/write gose
through the existing driver while my application goes through the my
new module. In that case suppose i m accessing the perticular sector
from my application, then i want that no other application can access
the same sector.

Is there any way to acheive the same??

Thanks and Regards,
-NUTTY


This is tricky...try to find out whats the lock its used to access the
sector and then u can use it in ur module. Havent worked on disk
drivers earlier, so culdnt give more insight..

Ciao


Ciao,
Thanks a lot!!!

The challenge we are facing is the
synchronization with the existing ide driver. The kernel module that we
have written directly accesses the ide controller registers. The
restriction is that we cannot make any changes in the currently running
ide driver.
But how to make sure that while my module is writing into a particular
sector, the existing driver does not interfere?
Is there a way to temporarily shutdown the
running IDE interface and resume it once the diagnostics is done?

Thanks & Regards,
-Nutty

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