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Revision 1.33, Mon Apr 25 17:10:09 2022 UTC (2 years, 1 month ago) by krw
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, OPENBSD_7_3_BASE, OPENBSD_7_3, OPENBSD_7_2_BASE, OPENBSD_7_2, HEAD
Changes since 1.32: +3 -4 lines 

Push DISK_[read|write]sectors() down to disk.c local functions
and expose new DISK_[read|write]bytes() functions.

Eliminates many bytes <-> sector i/o dances and makes the code
much easier to understand.

Be a bit more careful to consistently write only bytes that
checksums are calculated over.

No intentional functional change.

/*	$OpenBSD: disk.h,v 1.33 2022/04/25 17:10:09 krw Exp $	*/

/*
 * Copyright (c) 1997 Tobias Weingartner
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

struct disk {
	struct prt	 dk_bootprt;
	char		*dk_name;
	int		 dk_fd;
	uint32_t	 dk_cylinders;
	uint32_t	 dk_heads;
	uint32_t	 dk_sectors;
	uint32_t	 dk_size;
};

/* Align partition starts/sizes on 32K-byte boundaries. */
#define	BLOCKALIGNMENT	64

void		 DISK_open(const char *, const int);
void		 DISK_printgeometry(const char *);
int		 DISK_readbytes(void *, const uint64_t, const size_t);
int		 DISK_writebytes(const void *, const uint64_t, const size_t);

extern struct disk		disk;
extern struct disklabel		dl;