Michael Sternberg wrote:
Hi, I'm writing kernel module for 2.6 linux.
The purpose is to intercept all writes to disk devices and to notify
user mode application about sector/length of write.
I want to change function pointers of request_fn and make_request_fn to
my own routines.
Sounds like a horrible and racy plan. I'm sure there's a far better way.
The question is what is a difference between this two functions?
I did it for make_request_fn and checked with application that writes to
some sector on disk. But in kernel I got write to different location.
Make_request_fn gets bio as parameter so I got writes info from it, but
request_fn gets only queue as parameter.
AFAIK, make_request_fn is the function that produces the request queue = it queues requests for a device. request_fn is
the consumes the queue - it's the function where the driver reads the queue and handle the requests.
Gilad
--
Gilad Ben-Yossef <[EMAIL PROTECTED]>
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