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[src/sommerfeld_i386mp_1]: src/sys/arch/i386/i386 strategy should have an 'r'...
details: https://anonhg.NetBSD.org/src/rev/ab59455b7099
branches: sommerfeld_i386mp_1
changeset: 482494:ab59455b7099
user: wiz <wiz%NetBSD.org@localhost>
date: Tue Feb 19 17:09:45 2002 +0000
description:
strategy should have an 'r'. Inspired by similar change in OpenBSD.
diffstat:
sys/arch/i386/i386/disksubr.c | 518 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 518 insertions(+), 0 deletions(-)
diffs (truncated from 522 to 300 lines):
diff -r 3d6545fbb5ac -r ab59455b7099 sys/arch/i386/i386/disksubr.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/i386/i386/disksubr.c Tue Feb 19 17:09:45 2002 +0000
@@ -0,0 +1,518 @@
+/* $NetBSD: disksubr.c,v 1.45.2.2 2002/02/19 17:09:45 wiz 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. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. 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.
+ *
+ * @(#)ufs_disksubr.c 7.16 (Berkeley) 5/4/91
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: disksubr.c,v 1.45.2.2 2002/02/19 17:09:45 wiz 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>
+
+#include "opt_mbr.h"
+
+int fat_types[] = { MBR_PTYPE_FAT12, MBR_PTYPE_FAT16S,
+ MBR_PTYPE_FAT16B, MBR_PTYPE_FAT32,
+ MBR_PTYPE_FAT32L, MBR_PTYPE_FAT16L,
+ -1 };
+
+#define NO_MBR_SIGNATURE ((struct mbr_partition *) -1)
+
+static struct mbr_partition *
+mbr_findslice __P((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(dp, bp)
+ struct mbr_partition *dp;
+ struct buf *bp;
+{
+ struct mbr_partition *ourdp = NULL;
+ u_int16_t *mbrmagicp;
+ int i;
+
+ /* Note: Magic number is little-endian. */
+ mbrmagicp = (u_int16_t *)(bp->b_data + MBR_MAGICOFF);
+ if (*mbrmagicp != MBR_MAGIC)
+ return (NO_MBR_SIGNATURE);
+
+ /* XXX how do we check veracity/bounds of this? */
+ memcpy(dp, bp->b_data + MBR_PARTOFF, NMBRPART * sizeof(*dp));
+
+ /* look for NetBSD partition */
+ for (i = 0; i < NMBRPART; i++) {
+ if (dp[i].mbrp_typ == MBR_PTYPE_NETBSD) {
+ ourdp = &dp[i];
+ break;
+ }
+ }
+
+#ifdef COMPAT_386BSD_MBRPART
+ /* didn't find it -- look for 386BSD partition */
+ if (!ourdp) {
+ for (i = 0; i < NMBRPART; i++) {
+ if (dp[i].mbrp_typ == MBR_PTYPE_386BSD) {
+ printf("WARNING: old BSD partition ID!\n");
+ ourdp = &dp[i];
+ /*
+ * If more than one matches, take last,
+ * as NetBSD install tool does.
+ */
+#if 0
+ break;
+#endif
+ }
+ }
+ }
+#endif /* COMPAT_386BSD_MBRPART */
+
+ 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.
+ */
+char *
+readdisklabel(dev, strat, lp, osdep)
+ dev_t dev;
+ void (*strat) __P((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;
+ char *msg = NULL;
+ int dospartoff, cyl, i, *ip;
+
+ /* 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->dosparts;
+
+ /* 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 < NMBRPART; 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;
+ for (ip = fat_types; *ip != -1; ip++) {
+ if (dp->mbrp_typ == *ip)
+ pp->p_fstype = FS_MSDOS;
+ }
+ if (dp->mbrp_typ == MBR_PTYPE_LNXEXT2)
+ pp->p_fstype = FS_EX2FS;
+
+ if (dp->mbrp_typ == MBR_PTYPE_NTFS)
+ pp->p_fstype = FS_NTFS;
+
+ /* 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;
+#if 0
+ if (lp->d_ntracks != dp->mbrp_ehd + 1 ||
+ lp->d_nsectors != DPSECT(dp->mbrp_esect)) {
+ printf("disklabel: BIOS sees chs %d/%d/%d as ",
+ lp->d_ncylinders, lp->d_ntracks,
+ lp->d_nsectors);
+ lp->d_ntracks = dp->mbrp_ehd + 1;
+ lp->d_nsectors = DPSECT(dp->mbrp_esect);
+ lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors;
+ lp->d_ncylinders = lp->d_secperunit / lp->d_secpercyl;
+ if (! lp->d_ncylinders)
+ lp->d_ncylinders = 1;
+ printf("%d/%d/%d\n",
+ lp->d_ncylinders, lp->d_ntracks,
+ lp->d_nsectors);
+ }
+#endif
+ }
+ }
+ 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_flags &= ~(B_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 *)(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_flags &= ~(B_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);
+
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