NetBSD-5.0.2/sys/arch/luna68k/luna68k/disksubr.c
/* $NetBSD: disksubr.c,v 1.23 2007/10/17 19:55:04 garbled 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.
*
* Credits:
* This file was based mostly on the i386/disksubr.c file:
* @(#)ufs_disksubr.c 7.16 (Berkeley) 5/4/91
* The functions: disklabel_sun_to_bsd, disklabel_bsd_to_sun
* were originally taken from arch/sparc/scsi/sun_disklabel.c
* (which was written by Theo de Raadt) and then substantially
* rewritten by 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.
*
*/
/*
* Copyright (c) 1994, 1995 Gordon W. Ross
*
* 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.
*
* Credits:
* This file was based mostly on the i386/disksubr.c file:
* @(#)ufs_disksubr.c 7.16 (Berkeley) 5/4/91
* The functions: disklabel_sun_to_bsd, disklabel_bsd_to_sun
* were originally taken from arch/sparc/scsi/sun_disklabel.c
* (which was written by Theo de Raadt) and then substantially
* rewritten by Gordon W. Ross.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: disksubr.c,v 1.23 2007/10/17 19:55:04 garbled Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/disk.h>
#include <sys/dkbad.h>
#include <dev/sun/disklabel.h>
/*
* UniOS disklabel (== ISI disklabel) is very similar to SunOS.
* SunOS UniOS/ISI
* text 128 128
* (pad) 292 294
* rpm 2 -
* pcyl 2 badchk 2
* sparecyl 2 maxblk 4
* (pad) 4 dtype 2
* interleave 2 ndisk 2
* ncyl 2 2
* acyl 2 2
* ntrack 2 2
* nsect 2 2
* (pad) 4 bhead 2
* - ppart 2
* dkpart[8] 64 64
* magic 2 2
* cksum 2 2
*
* Magic number value and checksum calculation are identical. Subtle
* difference is partition start address; UniOS/ISI maintains sector
* numbers while SunOS label has cylinder number.
*
* It is found that LUNA Mach2.5 has BSD label embedded at offset 64
* retaining UniOS/ISI label at the end of label block. LUNA Mach
* manipulates BSD disklabel in the same manner as 4.4BSD. It's
* uncertain LUNA Mach can create a disklabel on fresh disks since
* Mach writedisklabel logic seems to fail when no BSD label is found.
*
* Kernel handles disklabel in this way;
* - searchs BSD label at offset 64
* - if not found, searchs UniOS/ISI label at the end of block
* - kernel can distinguish whether it was SunOS label or UniOS/ISI
* label and understand both
* - kernel writes UniOS/ISI label combined with BSD label to update
* the label block
*/
#if LABELSECTOR != 0
#error "Default value of LABELSECTOR no longer zero?"
#endif
static const char *disklabel_om_to_bsd __P((char *, struct disklabel *));
static int disklabel_bsd_to_om __P((struct disklabel *, char *));
/*
* 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.
*/
const char *
readdisklabel(dev, strat, lp, clp)
dev_t dev;
void (*strat) __P((struct buf *));
struct disklabel *lp;
struct cpu_disklabel *clp;
{
struct buf *bp;
struct disklabel *dlp;
struct sun_disklabel *slp;
int error;
/* minimal requirements for archtypal disk label */
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;
/* obtain buffer to probe drive with */
bp = geteblk((int)lp->d_secsize);
/* next, dig out disk label */
bp->b_dev = dev;
bp->b_blkno = LABELSECTOR;
bp->b_cylinder = 0;
bp->b_bcount = lp->d_secsize;
bp->b_flags |= B_READ;
(*strat)(bp);
/* if successful, locate disk label within block and validate */
error = biowait(bp);
if (!error) {
/* Save the whole block in case it has info we need. */
bcopy(bp->b_data, clp->cd_block, sizeof(clp->cd_block));
}
brelse(bp, 0);
if (error)
return ("disk label read error");
/* Check for a NetBSD disk label first. */
dlp = (struct disklabel *)(clp->cd_block + LABELOFFSET);
if (dlp->d_magic == DISKMAGIC && dlp->d_magic2 == DISKMAGIC) {
if (dkcksum(dlp) == 0) {
*lp = *dlp; /* struct assignment */
return (NULL);
}
printf("NetBSD disk label corrupted");
}
/* Check for a UniOS/ISI disk label. */
slp = (struct sun_disklabel *)clp->cd_block;
if (slp->sl_magic == SUN_DKMAGIC) {
return (disklabel_om_to_bsd(clp->cd_block, lp));
}
memset(clp->cd_block, 0, sizeof(clp->cd_block));
return ("no disk label");
}
/*
* Check new disk label for sensibility
* before setting it.
*/
int
setdisklabel(olp, nlp, openmask, clp)
struct disklabel *olp, *nlp;
u_long openmask;
struct cpu_disklabel *clp;
{
struct partition *opp, *npp;
int i;
/* sanity clause */
if ((nlp->d_secpercyl == 0) || (nlp->d_secsize == 0) ||
(nlp->d_secsize % DEV_BSIZE) != 0)
return (EINVAL);
/* special case to allow disklabel to be invalidated */
if (nlp->d_magic == 0xffffffff) {
*olp = *nlp;
return (0);
}
if (nlp->d_magic != DISKMAGIC ||
nlp->d_magic2 != DISKMAGIC ||
dkcksum(nlp) != 0)
return (EINVAL);
while (openmask != 0) {
i = ffs(openmask) - 1;
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);
}
/* We did not modify the new label, so the checksum is OK. */
*olp = *nlp;
return (0);
}
/*
* Write disk label back to device after modification.
* Current label is already in clp->cd_block[]
*/
int
writedisklabel(dev, strat, lp, clp)
dev_t dev;
void (*strat) __P((struct buf *));
struct disklabel *lp;
struct cpu_disklabel *clp;
{
struct buf *bp;
struct disklabel *dlp;
int error;
/* implant NetBSD disklabel at LABELOFFSET. */
dlp = (struct disklabel *)(clp->cd_block + LABELOFFSET);
*dlp = *lp; /* struct assignment */
error = disklabel_bsd_to_om(lp, clp->cd_block);
if (error)
return (error);
/* Get a buffer and copy the new label into it. */
bp = geteblk((int)lp->d_secsize);
bcopy(clp->cd_block, bp->b_data, sizeof(clp->cd_block));
/* Write out the updated label. */
bp->b_dev = dev;
bp->b_blkno = LABELSECTOR;
bp->b_cylinder = 0;
bp->b_bcount = lp->d_secsize;
bp->b_flags |= B_WRITE;
(*strat)(bp);
error = biowait(bp);
brelse(bp, 0);
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[8] = {
FS_BSDFFS, /* a */
FS_SWAP, /* b */
FS_OTHER, /* c - whole disk */
FS_BSDFFS, /* d */
FS_BSDFFS, /* e */
FS_BSDFFS, /* f */
FS_BSDFFS, /* g */
FS_BSDFFS, /* h */
};
/*
* Given a UniOS/ISI 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.
*/
static const char *
disklabel_om_to_bsd(cp, lp)
char *cp;
struct disklabel *lp;
{
struct sun_disklabel *sl;
struct partition *npp;
struct sun_dkpart *spp;
int i, secpercyl;
u_short cksum, *sp1, *sp2;
sl = (struct sun_disklabel *)cp;
/* Verify the XOR check. */
sp1 = (u_short *)sl;
sp2 = (u_short *)(sl + 1);
cksum = 0;
while (sp1 < sp2)
cksum ^= *sp1++;
if (cksum != 0)
return ("UniOS disk label, bad checksum");
memset((void *)lp, 0, sizeof(struct disklabel));
/* Format conversion. */
lp->d_magic = DISKMAGIC;
lp->d_magic2 = DISKMAGIC;
memcpy(lp->d_packname, sl->sl_text, sizeof(lp->d_packname));
lp->d_type = DTYPE_SCSI;
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;
lp->d_secperunit = secpercyl * sl->sl_ncylinders;
lp->d_sparespercyl = 0; /* no way to know */
lp->d_acylinders = sl->sl_acylinders;
lp->d_rpm = sl->sl_rpm; /* UniOS - (empty) */
lp->d_interleave = sl->sl_interleave; /* UniOS - ndisk */
if (sl->sl_rpm == 0) {
/* UniOS label has blkoffset, not cyloffset */
secpercyl = 1;
}
lp->d_npartitions = 8;
/* 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];
npp->p_offset = spp->sdkp_cyloffset * secpercyl;
npp->p_size = spp->sdkp_nsectors;
if (npp->p_size == 0)
npp->p_fstype = FS_UNUSED;
else {
/* Partition has non-zero size. Set type, etc. */
npp->p_fstype = sun_fstypes[i];
/*
* The sun label does not store the FFS fields,
* so just set them with default values here.
* XXX: This keeps newfs from trying to rewrite
* XXX: the disk label in the most common case.
* XXX: (Should remove that code from newfs...)
*/
if (npp->p_fstype == FS_BSDFFS) {
npp->p_fsize = 1024;
npp->p_frag = 8;
npp->p_cpg = 16;
}
}
}
/*
* XXX BandAid XXX
* UniOS rootfs sits on part c which don't begin at sect 0,
* and impossible to mount. Thus, make it usable as part b.
*/
if (sl->sl_rpm == 0 && lp->d_partitions[2].p_offset != 0) {
lp->d_partitions[1] = lp->d_partitions[2];
lp->d_partitions[1].p_fstype = FS_BSDFFS;
}
lp->d_checksum = dkcksum(lp);
return (NULL);
}
/*
* Given a BSD disk label, update the UniOS disklabel
* pointed to by cp with the new info. Note that the
* UniOS disklabel may have other info we need to keep.
* Returns zero or error code.
*/
static int
disklabel_bsd_to_om(lp, cp)
struct disklabel *lp;
char *cp;
{
struct sun_disklabel *sl;
struct partition *npp;
struct sun_dkpart *spp;
int i;
u_short cksum, *sp1, *sp2;
if (lp->d_secsize != 512)
return (EINVAL);
sl = (struct sun_disklabel *)cp;
/* Format conversion. */
memcpy(sl->sl_text, lp->d_packname, sizeof(lp->d_packname));
sl->sl_rpm = 0; /* UniOS */
#if 0 /* leave as was */
sl->sl_pcyl = lp->d_ncylinders + lp->d_acylinders; /* XXX */
sl->sl_sparespercyl = lp->d_sparespercyl;
#endif
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;
for (i = 0; i < 8; i++) {
spp = &sl->sl_part[i];
npp = &lp->d_partitions[i];
spp->sdkp_cyloffset = npp->p_offset; /* UniOS */
spp->sdkp_nsectors = npp->p_size;
}
sl->sl_magic = SUN_DKMAGIC;
/* 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);
}