File:  [CSRG BSD Unix] / 40BSD / sys / dev / dkleave.c
Revision 1.1.1.1 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 16:12:53 2018 UTC (8 years, 1 month ago) by root
Branches: MAIN, BSD
CVS tags: HEAD, BSD40
BSD 4.0

/*	dkleave.c	4.1	11/9/80	*/

#ifdef INTRLVE
#include "../h/param.h"
#include "../h/buf.h"

daddr_t
dkblock(bp)
register struct buf *bp;
{
	register int dminor;

	if (((dminor=minor(bp->b_dev))&0100) == 0)
		return(bp->b_blkno);
	dminor >>= 3;
	dminor &= 07;
	dminor++;
	return(bp->b_blkno/dminor);
}

dkunit(bp)
register struct buf *bp;
{
	register int dminor;

	dminor = minor(bp->b_dev) >> 3;
	if ((dminor&010) == 0)
		return(dminor);
	dminor &= 07;
	dminor++;
	return(bp->b_blkno%dminor);
}
#endif

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