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[src/trunk]: src/sys/arch/cobalt Use MI subr_disk_mbr.c for proper MBR and bi...
details: https://anonhg.NetBSD.org/src/rev/fe1679128f67
branches: trunk
changeset: 1023338:fe1679128f67
user: tsutsui <tsutsui%NetBSD.org@localhost>
date: Sat Sep 04 02:24:26 2021 +0000
description:
Use MI subr_disk_mbr.c for proper MBR and bi-endian supprot.
No special MD handling in previous. Briefly tested on gxemul 0.6.3.
diffstat:
sys/arch/cobalt/cobalt/disksubr.c | 337 --------------------------------------
sys/arch/cobalt/conf/files.cobalt | 5 +-
2 files changed, 3 insertions(+), 339 deletions(-)
diffs (truncated from 363 to 300 lines):
diff -r c45501521bbb -r fe1679128f67 sys/arch/cobalt/cobalt/disksubr.c
--- a/sys/arch/cobalt/cobalt/disksubr.c Sat Sep 04 02:19:56 2021 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,337 +0,0 @@
-/* $NetBSD: disksubr.c,v 1.26 2019/04/03 22:10:50 christos Exp $ */
-
-/*
- * Copyright (c) 1982, 1986, 1988 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: disksubr.c,v 1.26 2019/04/03 22:10:50 christos Exp $");
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/buf.h>
-#include <sys/disklabel.h>
-#include <sys/disk.h>
-#include <sys/syslog.h>
-
-#define NO_MBR_SIGNATURE ((struct mbr_partition *) -1)
-
-static struct mbr_partition *
-mbr_findslice(struct mbr_partition* dp, struct buf *bp);
-
-/*
- * Scan MBR for NetBSD partittion. Return NO_MBR_SIGNATURE if no MBR found
- * Otherwise, copy valid MBR partition-table into dp, and if a NetBSD
- * partition is found, return a pointer to it; else return NULL.
- */
-static struct mbr_partition *
-mbr_findslice(struct mbr_partition *dp, struct buf *bp)
-{
- struct mbr_partition *ourdp = NULL;
- uint16_t *mbrmagicp;
- int i;
-
- /* Note: Magic number is little-endian. */
- mbrmagicp = (uint16_t *)((char *)bp->b_data + MBR_MAGIC_OFFSET);
- if (*mbrmagicp != MBR_MAGIC)
- return NO_MBR_SIGNATURE;
-
- /* XXX how do we check veracity/bounds of this? */
- memcpy(dp, (char *)bp->b_data + MBR_PART_OFFSET,
- MBR_PART_COUNT * sizeof(*dp));
-
- /* look for NetBSD partition */
- for (i = 0; i < MBR_PART_COUNT; i++) {
- if (dp[i].mbrp_type == MBR_PTYPE_NETBSD) {
- ourdp = &dp[i];
- break;
- }
- }
-
- return ourdp;
-}
-
-
-/*
- * Attempt to read a disk label from a device
- * using the indicated strategy routine.
- * The label must be partly set up before this:
- * secpercyl, secsize and anything required for a block i/o read
- * operation in the driver's strategy/start routines
- * must be filled in before calling us.
- *
- * If dos partition table requested, attempt to load it and
- * find disklabel inside a DOS partition. Also, if bad block
- * table needed, attempt to extract it as well. Return buffer
- * for use in signalling errors if requested.
- *
- * Returns null on success and an error string on failure.
- */
-const char *
-readdisklabel(dev_t dev, void (*strat)(struct buf *), struct disklabel *lp,
- struct cpu_disklabel *osdep)
-{
- struct mbr_partition *dp;
- struct partition *pp;
- struct dkbad *bdp;
- struct buf *bp;
- struct disklabel *dlp;
- const char *msg = NULL;
- int dospartoff, cyl, i;
-
- /* minimal requirements for archtypal disk label */
- if (lp->d_secsize == 0)
- lp->d_secsize = DEV_BSIZE;
- if (lp->d_secperunit == 0)
- lp->d_secperunit = 0x1fffffff;
-#if 0
- if (lp->d_ncylinders == 16383) {
- printf("disklabel: Disk > 8G ... readjusting chs %d/%d/%d to ",
- lp->d_ncylinders, lp->d_ntracks, lp->d_nsectors);
- lp->d_ncylinders =
- lp->d_secperunit / lp->d_ntracks / lp->d_nsectors;
- printf("%d/%d/%d\n",
- lp->d_ncylinders, lp->d_ntracks, lp->d_nsectors);
- }
-#endif
- lp->d_npartitions = RAW_PART + 1;
- for (i = 0; i < RAW_PART; i++) {
- lp->d_partitions[i].p_size = 0;
- lp->d_partitions[i].p_offset = 0;
- }
- if (lp->d_partitions[i].p_size == 0)
- lp->d_partitions[i].p_size = 0x1fffffff;
- lp->d_partitions[i].p_offset = 0;
-
- /* get a buffer and initialize it */
- bp = geteblk((int)lp->d_secsize);
- bp->b_dev = dev;
-
- /* do dos partitions in the process of getting disklabel? */
- dospartoff = 0;
- cyl = LABELSECTOR / lp->d_secpercyl;
- if (!osdep)
- goto nombrpart;
- dp = osdep->mbrparts;
-
- /* read master boot record */
- bp->b_blkno = MBR_BBSECTOR;
- bp->b_bcount = lp->d_secsize;
- bp->b_flags |= B_READ;
- bp->b_cylinder = MBR_BBSECTOR / lp->d_secpercyl;
- (*strat)(bp);
-
- /* if successful, wander through dos partition table */
- if (biowait(bp)) {
- msg = "dos partition I/O error";
- goto done;
- } else {
- struct mbr_partition *ourdp = NULL;
-
- ourdp = mbr_findslice(dp, bp);
- if (ourdp == NO_MBR_SIGNATURE)
- goto nombrpart;
-
- for (i = 0; i < MBR_PART_COUNT; i++, dp++) {
- /* Install in partition e, f, g, or h. */
- pp = &lp->d_partitions[RAW_PART + 1 + i];
- pp->p_offset = dp->mbrp_start;
- pp->p_size = dp->mbrp_size;
- pp->p_fstype = xlat_mbr_fstype(dp->mbrp_type);
-
- /* is this ours? */
- if (dp == ourdp) {
- /* need sector address for SCSI/IDE,
- cylinder for ESDI/ST506/RLL */
- dospartoff = dp->mbrp_start;
- cyl = MBR_PCYL(dp->mbrp_scyl, dp->mbrp_ssect);
-
- /* update disklabel with details */
- lp->d_partitions[2].p_size =
- dp->mbrp_size;
- lp->d_partitions[2].p_offset =
- dp->mbrp_start;
- }
- }
- lp->d_npartitions = RAW_PART + 1 + i;
- }
-
- nombrpart:
- /* next, dig out disk label */
- bp->b_blkno = dospartoff + LABELSECTOR;
- bp->b_cylinder = cyl;
- bp->b_bcount = lp->d_secsize;
- bp->b_oflags &= ~(BO_DONE);
- bp->b_flags |= B_READ;
- (*strat)(bp);
-
- /* if successful, locate disk label within block and validate */
- if (biowait(bp)) {
- msg = "disk label I/O error";
- goto done;
- }
- for (dlp = (struct disklabel *)bp->b_data;
- dlp <= (struct disklabel *)((char *)bp->b_data + lp->d_secsize -
- sizeof(*dlp));
- dlp = (struct disklabel *)((char *)dlp + sizeof(long))) {
- if (dlp->d_magic != DISKMAGIC || dlp->d_magic2 != DISKMAGIC) {
- if (msg == NULL)
- msg = "no disk label";
- } else if (dlp->d_npartitions > MAXPARTITIONS ||
- dkcksum(dlp) != 0)
- msg = "disk label corrupted";
- else {
- *lp = *dlp;
- msg = NULL;
- break;
- }
- }
-
- if (msg)
- goto done;
-
- /* obtain bad sector table if requested and present */
- if (osdep && (lp->d_flags & D_BADSECT)) {
- struct dkbad *db;
-
- bdp = &osdep->bad;
- i = 0;
- do {
- /* read a bad sector table */
- bp->b_oflags &= ~(BO_DONE);
- bp->b_flags |= B_READ;
- bp->b_blkno = lp->d_secperunit - lp->d_nsectors + i;
- if (lp->d_secsize > DEV_BSIZE)
- bp->b_blkno *= lp->d_secsize / DEV_BSIZE;
- else
- bp->b_blkno /= DEV_BSIZE / lp->d_secsize;
- bp->b_bcount = lp->d_secsize;
- bp->b_cylinder = lp->d_ncylinders - 1;
- (*strat)(bp);
-
- /* if successful, validate, otherwise try another */
- if (biowait(bp)) {
- msg = "bad sector table I/O error";
- } else {
- db = (struct dkbad *)(bp->b_data);
-#define DKBAD_MAGIC 0x4321
- if (db->bt_mbz == 0
- && db->bt_flag == DKBAD_MAGIC) {
- msg = NULL;
- *bdp = *db;
- break;
- } else
- msg = "bad sector table corrupted";
- }
- } while (bp->b_error != 0 && (i += 2) < 10 &&
- i < lp->d_nsectors);
- }
-
-done:
- brelse(bp, 0);
- return msg;
-}
-
-/*
- * Write disk label back to device after modification.
- */
-int
-writedisklabel(dev_t dev, void (*strat)(struct buf *), struct disklabel *lp,
- struct cpu_disklabel *osdep)
-{
- struct mbr_partition *dp;
- struct buf *bp;
- struct disklabel *dlp;
- int error, dospartoff, cyl;
-
- /* get a buffer and initialize it */
- bp = geteblk((int)lp->d_secsize);
- bp->b_dev = dev;
-
- /* do dos partitions in the process of getting disklabel? */
- dospartoff = 0;
- cyl = LABELSECTOR / lp->d_secpercyl;
- if (!osdep)
- goto nombrpart;
- dp = osdep->mbrparts;
-
- /* read master boot record */
- bp->b_blkno = MBR_BBSECTOR;
- bp->b_bcount = lp->d_secsize;
- bp->b_flags |= B_READ;
- bp->b_cylinder = MBR_BBSECTOR / lp->d_secpercyl;
- (*strat)(bp);
-
- if ((error = biowait(bp)) == 0) {
- struct mbr_partition *ourdp = NULL;
-
- ourdp = mbr_findslice(dp, bp);
- if (ourdp == NO_MBR_SIGNATURE)
- goto nombrpart;
-
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