/* $OpenBSD: disksubr.c,v 1.70 2007/07/01 19:06:58 miod Exp $ */
/* $NetBSD: disksubr.c,v 1.16 1996/04/28 20:25:59 thorpej Exp $ */
/*
* Copyright (c) 1994, 1995 Gordon W. Ross
* Copyright (c) 1994 Theo de Raadt
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/ioccom.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/disk.h>
#include <sys/dkbad.h>
#include <machine/cpu.h>
#include <machine/autoconf.h>
#include <dev/sun/disklabel.h>
#if defined(SUN4)
#include <machine/oldmon.h>
#endif
#include "cd.h"
static char *disklabel_sun_to_bsd(struct sun_disklabel *, struct disklabel *);
static int disklabel_bsd_to_sun(struct disklabel *, struct sun_disklabel *);
static __inline u_int sun_extended_sum(struct sun_disklabel *, void *);
#if NCD > 0
extern void cdstrategy(struct buf *);
#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, 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.
*
* Return buffer for use in signalling errors if requested.
*
* Returns null on success and an error string on failure.
*/
char *
readdisklabel(dev_t dev, void (*strat)(struct buf *),
struct disklabel *lp, int spoofonly)
{
struct sun_disklabel *slp;
struct buf *bp = NULL;
char *msg;
if ((msg = initdisklabel(lp)))
goto done;
/*
* On sparc64 we check for a CD label first, because our
* CD install media contains both sparc & sparc64 labels.
* We want the sparc64 machine to find the "CD label", not
* the SunOS label, for loading it's kernel.
*/
#if NCD > 0
if (strat == cdstrategy) {
#if defined(CD9660)
if (iso_disklabelspoof(dev, strat, lp) == 0)
goto done;
#endif
#if defined(UDF)
if (udf_disklabelspoof(dev, strat, lp) == 0)
goto done;
#endif
}
#endif /* NCD > 0 */
/* get a buffer and initialize it */
bp = geteblk((int)lp->d_secsize);
bp->b_dev = dev;
if (spoofonly)
goto doslabel;
bp->b_blkno = LABELSECTOR;
bp->b_bcount = lp->d_secsize;
bp->b_flags = B_BUSY | B_READ;
(*strat)(bp);
if (biowait(bp)) {
msg = "disk label read error";
goto done;
}
slp = (struct sun_disklabel *)bp->b_data;
if (slp->sl_magic == SUN_DKMAGIC) {
msg = disklabel_sun_to_bsd(slp, lp);
goto done;
}
msg = checkdisklabel(bp->b_data + LABELOFFSET, lp);
if (msg == NULL)
goto done;
doslabel:
msg = readdoslabel(bp, strat, lp, NULL, spoofonly);
if (msg == NULL)
goto done;
/* A CD9660/UDF label may be on a non-CD drive, so recheck */
#if defined(CD9660)
if (iso_disklabelspoof(dev, strat, lp) == 0) {
msg = NULL;
goto done;
}
#endif
#if defined(UDF)
if (udf_disklabelspoof(dev, strat, lp) == 0) {
msg = NULL;
goto done;
}
#endif
done:
if (bp) {
bp->b_flags |= B_INVAL;
brelse(bp);
}
return (msg);
}
/*
* Write disk label back to device after modification.
*/
int
writedisklabel(dev_t dev, void (*strat)(struct buf *), struct disklabel *lp)
{
struct buf *bp = NULL;
int error;
/* get a buffer and initialize it */
bp = geteblk((int)lp->d_secsize);
bp->b_dev = dev;
error = disklabel_bsd_to_sun(lp, (struct sun_disklabel *)bp->b_data);
if (error)
goto done;
/* Write out the updated label. */
bp->b_blkno = LABELSECTOR;
bp->b_bcount = lp->d_secsize;
bp->b_flags = B_BUSY | B_WRITE;
(*strat)(bp);
error = biowait(bp);
done:
if (bp) {
bp->b_flags |= B_INVAL;
brelse(bp);
}
return (error);
}
/************************************************************************
*
* The rest of this was taken from arch/sparc/scsi/sun_disklabel.c
* and then substantially rewritten by Gordon W. Ross
*
************************************************************************/
/* What partition types to assume for Sun disklabels: */
static u_char
sun_fstypes[16] = {
FS_BSDFFS, /* a */
FS_SWAP, /* b */
FS_UNUSED, /* c - whole disk */
FS_BSDFFS, /* d */
FS_BSDFFS, /* e */
FS_BSDFFS, /* f */
FS_BSDFFS, /* g */
FS_BSDFFS, /* h */
FS_BSDFFS, /* i */
FS_BSDFFS, /* j */
FS_BSDFFS, /* k */
FS_BSDFFS, /* l */
FS_BSDFFS, /* m */
FS_BSDFFS, /* n */
FS_BSDFFS, /* o */
FS_BSDFFS /* p */
};
/*
* Given a struct sun_disklabel, assume it has an extended partition
* table and compute the correct value for sl_xpsum.
*/
static __inline u_int
sun_extended_sum(struct sun_disklabel *sl, void *end)
{
u_int sum, *xp, *ep;
xp = (u_int *)&sl->sl_xpmag;
ep = (u_int *)end;
sum = 0;
for (; xp < ep; xp++)
sum += *xp;
return (sum);
}
/*
* Given a SunOS disk label, set lp to a BSD disk label.
* Returns NULL on success, else an error string.
*
* The BSD label is cleared out before this is called.
*/
char *
disklabel_sun_to_bsd(struct sun_disklabel *sl, struct disklabel *lp)
{
struct partition *npp;
struct sun_dkpart *spp;
int i, secpercyl;
u_short cksum = 0, *sp1, *sp2;
/* Verify the XOR check. */
sp1 = (u_short *)sl;
sp2 = (u_short *)(sl + 1);
while (sp1 < sp2)
cksum ^= *sp1++;
if (cksum != 0)
return ("SunOS disk label, bad checksum");
/* Format conversion. */
lp->d_magic = DISKMAGIC;
lp->d_magic2 = DISKMAGIC;
lp->d_flags = D_VENDOR;
memcpy(lp->d_packname, sl->sl_text, sizeof(lp->d_packname));
lp->d_secsize = 512;
lp->d_nsectors = sl->sl_nsectors;
lp->d_ntracks = sl->sl_ntracks;
lp->d_ncylinders = sl->sl_ncylinders;
secpercyl = sl->sl_nsectors * sl->sl_ntracks;
lp->d_secpercyl = secpercyl;
if (DL_GETDSIZE(lp) == 0)
DL_SETDSIZE(lp, (daddr64_t)secpercyl * sl->sl_ncylinders);
lp->d_version = 1;
lp->d_sparespercyl = sl->sl_sparespercyl;
lp->d_acylinders = sl->sl_acylinders;
lp->d_rpm = sl->sl_rpm;
lp->d_interleave = sl->sl_interleave;
lp->d_npartitions = MAXPARTITIONS;
/* These are as defined in <ufs/ffs/fs.h> */
lp->d_bbsize = 8192; /* XXX */
lp->d_sbsize = 8192; /* XXX */
for (i = 0; i < 8; i++) {
spp = &sl->sl_part[i];
npp = &lp->d_partitions[i];
DL_SETPOFFSET(npp, spp->sdkp_cyloffset * secpercyl);
DL_SETPSIZE(npp, spp->sdkp_nsectors);
if (DL_GETPSIZE(npp) == 0) {
npp->p_fstype = FS_UNUSED;
} else {
npp->p_fstype = sun_fstypes[i];
if (npp->p_fstype == FS_BSDFFS) {
/*
* The sun label does not store the FFS fields,
* so just set them with default values here.
*/
npp->p_fragblock =
DISKLABELV1_FFS_FRAGBLOCK(2048, 8);
npp->p_cpg = 16;
}
}
}
/* Clear "extended" partition info, tentatively */
for (i = 0; i < SUNXPART; i++) {
npp = &lp->d_partitions[i+8];
DL_SETPOFFSET(npp, 0);
DL_SETPSIZE(npp, 0);
npp->p_fstype = FS_UNUSED;
}
/* Check to see if there's an "extended" partition table
* SL_XPMAG partitions had checksums up to just before the
* (new) sl_types variable, while SL_XPMAGTYP partitions have
* checksums up to the just before the (new) sl_xxx1 variable.
*/
if ((sl->sl_xpmag == SL_XPMAG &&
sun_extended_sum(sl, &sl->sl_types) == sl->sl_xpsum) ||
(sl->sl_xpmag == SL_XPMAGTYP &&
sun_extended_sum(sl, &sl->sl_xxx1) == sl->sl_xpsum)) {
/*
* There is. Copy over the "extended" partitions.
* This code parallels the loop for partitions a-h.
*/
for (i = 0; i < SUNXPART; i++) {
spp = &sl->sl_xpart[i];
npp = &lp->d_partitions[i+8];
DL_SETPOFFSET(npp, spp->sdkp_cyloffset * secpercyl);
DL_SETPSIZE(npp, spp->sdkp_nsectors);
if (DL_GETPSIZE(npp) == 0) {
npp->p_fstype = FS_UNUSED;
continue;
}
npp->p_fstype = sun_fstypes[i+8];
if (npp->p_fstype == FS_BSDFFS) {
npp->p_fragblock =
DISKLABELV1_FFS_FRAGBLOCK(2048, 8);
npp->p_cpg = 16;
}
}
if (sl->sl_xpmag == SL_XPMAGTYP)
for (i = 0; i < MAXPARTITIONS; i++) {
npp = &lp->d_partitions[i];
npp->p_fstype = sl->sl_types[i];
npp->p_fragblock = sl->sl_fragblock[i];
npp->p_cpg = sl->sl_cpg[i];
}
}
lp->d_checksum = 0;
lp->d_checksum = dkcksum(lp);
return (NULL);
}
/*
* Given a BSD disk label, update the Sun disklabel
* pointed to by cp with the new info. Note that the
* Sun disklabel may have other info we need to keep.
* Returns zero or error code.
*/
static int
disklabel_bsd_to_sun(struct disklabel *lp, struct sun_disklabel *sl)
{
struct partition *npp;
struct sun_dkpart *spp;
int i, secpercyl;
u_short cksum, *sp1, *sp2;
/* Enforce preconditions */
if (lp->d_secsize != 512 || lp->d_nsectors == 0 || lp->d_ntracks == 0)
return (EINVAL);
/* Format conversion. */
memcpy(sl->sl_text, lp->d_packname, sizeof(lp->d_packname));
sl->sl_rpm = lp->d_rpm;
sl->sl_pcylinders = lp->d_ncylinders + lp->d_acylinders; /* XXX */
sl->sl_sparespercyl = lp->d_sparespercyl;
sl->sl_interleave = lp->d_interleave;
sl->sl_ncylinders = lp->d_ncylinders;
sl->sl_acylinders = lp->d_acylinders;
sl->sl_ntracks = lp->d_ntracks;
sl->sl_nsectors = lp->d_nsectors;
secpercyl = sl->sl_nsectors * sl->sl_ntracks;
for (i = 0; i < 8; i++) {
spp = &sl->sl_part[i];
npp = &lp->d_partitions[i];
if (DL_GETPOFFSET(npp) % secpercyl)
return (EINVAL);
spp->sdkp_cyloffset = DL_GETPOFFSET(npp) / secpercyl;
spp->sdkp_nsectors = DL_GETPSIZE(npp);
}
sl->sl_magic = SUN_DKMAGIC;
for (i = 0; i < SUNXPART; i++) {
if (DL_GETPOFFSET(&lp->d_partitions[i+8]) ||
DL_GETPSIZE(&lp->d_partitions[i+8]))
break;
}
for (i = 0; i < SUNXPART; i++) {
spp = &sl->sl_xpart[i];
npp = &lp->d_partitions[i+8];
if (DL_GETPOFFSET(npp) % secpercyl)
return (EINVAL);
sl->sl_xpart[i].sdkp_cyloffset =
DL_GETPOFFSET(npp) / secpercyl;
sl->sl_xpart[i].sdkp_nsectors = DL_GETPSIZE(npp);
}
for (i = 0; i < MAXPARTITIONS; i++) {
npp = &lp->d_partitions[i];
sl->sl_types[i] = npp->p_fstype;
sl->sl_fragblock[i] = npp->p_fragblock;
sl->sl_cpg[i] = npp->p_cpg;
}
sl->sl_xpmag = SL_XPMAGTYP;
sl->sl_xpsum = sun_extended_sum(sl, &sl->sl_xxx1);
/* Correct the XOR check. */
sp1 = (u_short *)sl;
sp2 = (u_short *)(sl + 1);
sl->sl_cksum = cksum = 0;
while (sp1 < sp2)
cksum ^= *sp1++;
sl->sl_cksum = cksum;
return (0);
}
/*
* Search the bad sector table looking for the specified sector.
* Return index if found.
* Return -1 if not found.
*/
int
isbad(struct dkbad *bt, int cyl, int trk, int sec)
{
int i;
long blk, bblk;
blk = ((long)cyl << 16) + (trk << 8) + sec;
for (i = 0; i < NBT_BAD; i++) {
bblk = ((long)bt->bt_bad[i].bt_cyl << 16) +
bt->bt_bad[i].bt_trksec;
if (blk == bblk)
return (i);
if (blk < bblk || bblk < 0)
break;
}
return (-1);
}