centos man page for bio_sector_offset

BIO_SECTOR_OFFSET(9)						   The Linux VFS					      BIO_SECTOR_OFFSET(9)

NAME
       bio_sector_offset - Find hardware sector offset in bio

SYNOPSIS
       sector_t bio_sector_offset(struct bio * bio, unsigned short index, unsigned int offset);

ARGUMENTS
       bio
	   bio to inspect

       index
	   bio_vec index

       offset
	   offset in bv_page

DESCRIPTION
       Return the number of hardware sectors between beginning of bio and an end point indicated by a bio_vec index and an offset within that
       vector's page.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						      BIO_SECTOR_OFFSET(9)