NetBSD-5.0.2/sys/arch/pmax/pmax/disksubr.c
/* $NetBSD: disksubr.c,v 1.48 2008/01/02 11:48:27 ad 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.
*
* @(#)ufs_disksubr.c 7.16 (Berkeley) 5/4/91
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: disksubr.c,v 1.48 2008/01/02 11:48:27 ad Exp $");
#include "opt_compat_ultrix.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/disk.h>
#include <sys/disklabel.h>
#ifdef COMPAT_ULTRIX
#include <dev/dec/dec_boot.h>
#include <ufs/ufs/dinode.h> /* XXX for fs.h */
#include <ufs/ffs/fs.h> /* XXX for BBSIZE & SBSIZE */
const char *compat_label __P((dev_t dev, void (*strat) __P((struct buf *bp)),
struct disklabel *lp, struct cpu_disklabel *osdep)); /* XXX */
#endif
/*
* Attempt to read a disk label from a device
* using the indicated strategy routine.
* The label must be partly set up before this:
* secpercyl and anything required in the strategy routine
* (e.g., sector size) must be filled in before calling us.
* Returns null on success and an error string on failure.
*/
const char *
readdisklabel(dev, strat, lp, osdep)
dev_t dev;
void (*strat) __P((struct buf *bp));
struct disklabel *lp;
struct cpu_disklabel *osdep;
{
struct buf *bp;
struct disklabel *dlp;
const char *msg = NULL;
if (lp->d_secperunit == 0)
lp->d_secperunit = 0x1fffffff;
lp->d_npartitions = 1;
if (lp->d_partitions[0].p_size == 0)
lp->d_partitions[0].p_size = 0x1fffffff;
lp->d_partitions[0].p_offset = 0;
bp = geteblk((int)lp->d_secsize);
bp->b_dev = dev;
bp->b_blkno = LABELSECTOR;
bp->b_bcount = lp->d_secsize;
bp->b_flags |= B_READ;
bp->b_cylinder = LABELSECTOR / lp->d_secpercyl;
(*strat)(bp);
if (biowait(bp)) {
msg = "I/O error";
} else for (dlp = (struct disklabel *)bp->b_data;
dlp <= (struct disklabel *)
((char *)bp->b_data + DEV_BSIZE - 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;
}
}
brelse(bp, 0);
#ifdef COMPAT_ULTRIX
/*
* If no NetBSD label was found, check for an Ultrix label and
* construct tne incore label from the Ultrix partition information.
*/
if (msg != NULL) {
msg = compat_label(dev, strat, lp, osdep);
if (msg == NULL) {
printf("WARNING: using Ultrix partition information\n");
/* set geometry? */
}
}
#endif
/* XXX If no NetBSD label or Ultrix label found, generate default label here */
return (msg);
}
#ifdef COMPAT_ULTRIX
/*
* Given a buffer bp, try and interpret it as an Ultrix disk label,
* putting the partition info into a native NetBSD label
*/
const char *
compat_label(dev, strat, lp, osdep)
dev_t dev;
void (*strat) __P((struct buf *bp));
struct disklabel *lp;
struct cpu_disklabel *osdep;
{
dec_disklabel *dlp;
struct buf *bp = NULL;
const char *msg = NULL;
bp = geteblk((int)lp->d_secsize);
bp->b_dev = dev;
bp->b_blkno = DEC_LABEL_SECTOR;
bp->b_bcount = lp->d_secsize;
bp->b_flags |= B_READ;
bp->b_cylinder = DEC_LABEL_SECTOR / lp->d_secpercyl;
(*strat)(bp);
if (biowait(bp)) {
msg = "I/O error";
goto done;
}
for (dlp = (dec_disklabel *)bp->b_data;
dlp <= (dec_disklabel *)
((char *)bp->b_data + DEV_BSIZE - sizeof(*dlp));
dlp = (dec_disklabel *)((char *)dlp + sizeof(long))) {
int part;
if (dlp->magic != DEC_LABEL_MAGIC) {
printf("label: %x\n",dlp->magic);
msg = ((msg != NULL) ? msg: "no disk label");
goto done;
}
#ifdef DIAGNOSTIC
/*XXX*/ printf("Interpreting Ultrix label\n");
#endif
lp->d_magic = DEC_LABEL_MAGIC;
lp->d_npartitions = 0;
strncpy(lp->d_packname, "Ultrix label", 16);
lp->d_rpm = 3600;
lp->d_interleave = 1;
lp->d_flags = 0;
lp->d_bbsize = BBSIZE;
lp->d_sbsize = SBLOCKSIZE;
for (part = 0;
part <((MAXPARTITIONS<DEC_NUM_DISK_PARTS) ?
MAXPARTITIONS : DEC_NUM_DISK_PARTS);
part++) {
lp->d_partitions[part].p_size = dlp->map[part].num_blocks;
lp->d_partitions[part].p_offset = dlp->map[part].start_block;
lp->d_partitions[part].p_fsize = 1024;
lp->d_partitions[part].p_fstype =
(part==1) ? FS_SWAP : FS_BSDFFS;
lp->d_npartitions += 1;
#ifdef DIAGNOSTIC
printf(" Ultrix label rz%d%c: start %d len %d\n",
DISKUNIT(dev), "abcdefgh"[part],
lp->d_partitions[part].p_offset,
lp->d_partitions[part].p_size);
#endif
}
break;
}
done:
brelse(bp, 0);
return (msg);
}
#endif /* COMPAT_ULTRIX */
/*
* Check new disk label for sensibility
* before setting it.
*/
int
setdisklabel(olp, nlp, openmask, osdep)
struct disklabel *olp, *nlp;
u_long openmask;
struct cpu_disklabel *osdep;
{
int i;
struct partition *opp, *npp;
if (nlp->d_magic != DISKMAGIC || nlp->d_magic2 != DISKMAGIC ||
dkcksum(nlp) != 0)
return (EINVAL);
while ((i = ffs(openmask)) != 0) {
i--;
openmask &= ~(1 << i);
if (nlp->d_npartitions <= i)
return (EBUSY);
opp = &olp->d_partitions[i];
npp = &nlp->d_partitions[i];
if (npp->p_offset != opp->p_offset || npp->p_size < opp->p_size)
return (EBUSY);
/*
* Copy internally-set partition information
* if new label doesn't include it. XXX
*/
if (npp->p_fstype == FS_UNUSED && opp->p_fstype != FS_UNUSED) {
npp->p_fstype = opp->p_fstype;
npp->p_fsize = opp->p_fsize;
npp->p_frag = opp->p_frag;
npp->p_cpg = opp->p_cpg;
}
}
nlp->d_checksum = 0;
nlp->d_checksum = dkcksum(nlp);
*olp = *nlp;
return (0);
}
/*
* Write disk label back to device after modification.
*/
int
writedisklabel(dev, strat, lp, osdep)
dev_t dev;
void (*strat) __P((struct buf *bp));
struct disklabel *lp;
struct cpu_disklabel *osdep;
{
struct buf *bp;
struct disklabel *dlp;
int labelpart;
int error = 0;
labelpart = DISKPART(dev);
if (lp->d_partitions[labelpart].p_offset != 0) {
if (lp->d_partitions[0].p_offset != 0)
return (EXDEV); /* not quite right */
labelpart = 0;
}
bp = geteblk((int)lp->d_secsize);
bp->b_dev = makedev(major(dev), DISKMINOR(DISKUNIT(dev), labelpart));
bp->b_blkno = LABELSECTOR;
bp->b_bcount = lp->d_secsize;
bp->b_flags |= B_READ;
(*strat)(bp);
if ((error = biowait(bp)) != 0)
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 &&
dkcksum(dlp) == 0) {
*dlp = *lp;
bp->b_oflags &= ~(BO_DONE);
bp->b_flags &= ~(B_READ);
bp->b_flags |= B_WRITE;
(*strat)(bp);
error = biowait(bp);
goto done;
}
}
error = ESRCH;
done:
brelse(bp, 0);
return (error);
}