Re: Linux kernel API about sector count

[Mihai DonÈu]

On Mon, 11 Nov 2013 20:31:14 +0800 éç wrote:
> Can you tell me the API about the count of sector in linux kernel?
> 
> which .h file and function?
> 

Looking at fdisk (util-linux) there are several ioctls:
 * HDIO_GETGEO  (linux/hdreg.h)
 * BLKGETSIZE64 (linux/fs.h), sector size is assumed 512

The HDIO interface *seems* to be legacy:
http://www.mjmwired.net/kernel/Documentation/ioctl/hdio.txt

Also see:
https://git.kernel.org/cgit/utils/util-linux/util-linux.git/tree/fdisks/fdisk.c

I hope this helps a bit.

-- 
Mihai DonÈu
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