67812eacd7
lockmgr locks. This commit should be functionally equivalent to the old semantics. That is, all buffer locking is done with LK_EXCLUSIVE requests. Changes to take advantage of LK_SHARED and LK_RECURSIVE will be done in future commits.
446 lines
13 KiB
C
446 lines
13 KiB
C
/*-
|
|
* Copyright (c) 1994 Bruce D. Evans.
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* from: @(#)ufs_disksubr.c 7.16 (Berkeley) 5/4/91
|
|
* from: ufs_disksubr.c,v 1.8 1994/06/07 01:21:39 phk Exp $
|
|
* $Id: diskslice_machdep.c,v 1.34 1999/05/11 19:54:10 phk Exp $
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/buf.h>
|
|
#include <sys/conf.h>
|
|
#include <sys/disklabel.h>
|
|
#define DOSPTYP_EXTENDED 5
|
|
#define DOSPTYP_EXTENDEDX 15
|
|
#define DOSPTYP_ONTRACK 84
|
|
#include <sys/diskslice.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/syslog.h>
|
|
|
|
#define TRACE(str) do { if (dsi_debug) printf str; } while (0)
|
|
|
|
static volatile u_char dsi_debug;
|
|
|
|
static struct dos_partition historical_bogus_partition_table[NDOSPART] = {
|
|
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
|
|
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
|
|
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
|
|
{ 0x80, 0, 1, 0, DOSPTYP_386BSD, 255, 255, 255, 0, 50000, },
|
|
};
|
|
|
|
static int check_part __P((char *sname, struct dos_partition *dp,
|
|
u_long offset, int nsectors, int ntracks,
|
|
u_long mbr_offset));
|
|
static void extended __P((char *dname, dev_t dev, d_strategy_t *strat,
|
|
struct disklabel *lp, struct diskslices *ssp,
|
|
u_long ext_offset, u_long ext_size,
|
|
u_long base_ext_offset, int nsectors, int ntracks,
|
|
u_long mbr_offset));
|
|
|
|
static int
|
|
check_part(sname, dp, offset, nsectors, ntracks, mbr_offset )
|
|
char *sname;
|
|
struct dos_partition *dp;
|
|
u_long offset;
|
|
int nsectors;
|
|
int ntracks;
|
|
u_long mbr_offset;
|
|
{
|
|
int chs_ecyl;
|
|
int chs_esect;
|
|
int chs_scyl;
|
|
int chs_ssect;
|
|
int error;
|
|
u_long esector;
|
|
u_long esector1;
|
|
u_long secpercyl;
|
|
u_long ssector;
|
|
u_long ssector1;
|
|
|
|
secpercyl = (u_long)nsectors * ntracks;
|
|
chs_scyl = DPCYL(dp->dp_scyl, dp->dp_ssect);
|
|
chs_ssect = DPSECT(dp->dp_ssect);
|
|
ssector = chs_ssect - 1 + dp->dp_shd * nsectors + chs_scyl * secpercyl
|
|
+ mbr_offset;
|
|
ssector1 = offset + dp->dp_start;
|
|
|
|
/*
|
|
* If ssector1 is on a cylinder >= 1024, then ssector can't be right.
|
|
* Allow the C/H/S for it to be 1023/ntracks-1/nsectors, or correct
|
|
* apart from the cylinder being reduced modulo 1024. Always allow
|
|
* 1023/255/63.
|
|
*/
|
|
if ((ssector < ssector1
|
|
&& ((chs_ssect == nsectors && dp->dp_shd == ntracks - 1
|
|
&& chs_scyl == 1023)
|
|
|| (secpercyl != 0
|
|
&& (ssector1 - ssector) % (1024 * secpercyl) == 0)))
|
|
|| (dp->dp_scyl == 255 && dp->dp_shd == 255
|
|
&& dp->dp_ssect == 255)) {
|
|
TRACE(("%s: C/H/S start %d/%d/%d, start %lu: allow\n",
|
|
sname, chs_scyl, dp->dp_shd, chs_ssect, ssector1));
|
|
ssector = ssector1;
|
|
}
|
|
|
|
chs_ecyl = DPCYL(dp->dp_ecyl, dp->dp_esect);
|
|
chs_esect = DPSECT(dp->dp_esect);
|
|
esector = chs_esect - 1 + dp->dp_ehd * nsectors + chs_ecyl * secpercyl
|
|
+ mbr_offset;
|
|
esector1 = ssector1 + dp->dp_size - 1;
|
|
|
|
/* Allow certain bogus C/H/S values for esector, as above. */
|
|
if ((esector < esector1
|
|
&& ((chs_esect == nsectors && dp->dp_ehd == ntracks - 1
|
|
&& chs_ecyl == 1023)
|
|
|| (secpercyl != 0
|
|
&& (esector1 - esector) % (1024 * secpercyl) == 0)))
|
|
|| (dp->dp_ecyl == 255 && dp->dp_ehd == 255
|
|
&& dp->dp_esect == 255)) {
|
|
TRACE(("%s: C/H/S end %d/%d/%d, end %lu: allow\n",
|
|
sname, chs_ecyl, dp->dp_ehd, chs_esect, esector1));
|
|
esector = esector1;
|
|
}
|
|
|
|
error = (ssector == ssector1 && esector == esector1) ? 0 : EINVAL;
|
|
if (bootverbose)
|
|
printf("%s: type 0x%x, start %lu, end = %lu, size %lu %s\n",
|
|
sname, dp->dp_typ, ssector1, esector1,
|
|
(u_long)dp->dp_size, error ? "" : ": OK");
|
|
if (ssector != ssector1 && bootverbose)
|
|
printf("%s: C/H/S start %d/%d/%d (%lu) != start %lu: invalid\n",
|
|
sname, chs_scyl, dp->dp_shd, chs_ssect,
|
|
ssector, ssector1);
|
|
if (esector != esector1 && bootverbose)
|
|
printf("%s: C/H/S end %d/%d/%d (%lu) != end %lu: invalid\n",
|
|
sname, chs_ecyl, dp->dp_ehd, chs_esect,
|
|
esector, esector1);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
dsinit(dname, dev, strat, lp, sspp)
|
|
char *dname;
|
|
dev_t dev;
|
|
d_strategy_t *strat;
|
|
struct disklabel *lp;
|
|
struct diskslices **sspp;
|
|
{
|
|
struct buf *bp;
|
|
u_char *cp;
|
|
int dospart;
|
|
struct dos_partition *dp;
|
|
struct dos_partition *dp0;
|
|
int error;
|
|
int max_ncyls;
|
|
int max_nsectors;
|
|
int max_ntracks;
|
|
u_long mbr_offset;
|
|
char partname[2];
|
|
u_long secpercyl;
|
|
char *sname;
|
|
struct diskslice *sp;
|
|
struct diskslices *ssp;
|
|
|
|
mbr_offset = DOSBBSECTOR;
|
|
reread_mbr:
|
|
/* Read master boot record. */
|
|
bp = geteblk((int)lp->d_secsize);
|
|
bp->b_dev = dkmodpart(dkmodslice(dev, WHOLE_DISK_SLICE), RAW_PART);
|
|
bp->b_blkno = mbr_offset;
|
|
bp->b_bcount = lp->d_secsize;
|
|
bp->b_flags |= B_READ;
|
|
(*strat)(bp);
|
|
if (biowait(bp) != 0) {
|
|
diskerr(bp, dname, "error reading primary partition table",
|
|
LOG_PRINTF, 0, (struct disklabel *)NULL);
|
|
printf("\n");
|
|
error = EIO;
|
|
goto done;
|
|
}
|
|
|
|
/* Weakly verify it. */
|
|
cp = bp->b_data;
|
|
sname = dsname(dname, dkunit(dev), WHOLE_DISK_SLICE, RAW_PART,
|
|
partname);
|
|
if (cp[0x1FE] != 0x55 || cp[0x1FF] != 0xAA) {
|
|
if (bootverbose)
|
|
printf("%s: invalid primary partition table: no magic\n",
|
|
sname);
|
|
error = EINVAL;
|
|
goto done;
|
|
}
|
|
dp0 = (struct dos_partition *)(cp + DOSPARTOFF);
|
|
|
|
/* Check for "Ontrack Diskmanager". */
|
|
for (dospart = 0, dp = dp0; dospart < NDOSPART; dospart++, dp++) {
|
|
if (dp->dp_typ == DOSPTYP_ONTRACK) {
|
|
if (bootverbose)
|
|
printf(
|
|
"%s: Found \"Ontrack Disk Manager\" on this disk.\n", sname);
|
|
bp->b_flags |= B_INVAL | B_AGE;
|
|
brelse(bp);
|
|
mbr_offset = 63;
|
|
goto reread_mbr;
|
|
}
|
|
}
|
|
|
|
if (bcmp(dp0, historical_bogus_partition_table,
|
|
sizeof historical_bogus_partition_table) == 0) {
|
|
TRACE(("%s: invalid primary partition table: historical\n",
|
|
sname));
|
|
error = EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
/* Guess the geometry. */
|
|
/*
|
|
* TODO:
|
|
* Perhaps skip entries with 0 size.
|
|
* Perhaps only look at entries of type DOSPTYP_386BSD.
|
|
*/
|
|
max_ncyls = 0;
|
|
max_nsectors = 0;
|
|
max_ntracks = 0;
|
|
for (dospart = 0, dp = dp0; dospart < NDOSPART; dospart++, dp++) {
|
|
int ncyls;
|
|
int nsectors;
|
|
int ntracks;
|
|
|
|
ncyls = DPCYL(dp->dp_ecyl, dp->dp_esect) + 1;
|
|
if (max_ncyls < ncyls)
|
|
max_ncyls = ncyls;
|
|
nsectors = DPSECT(dp->dp_esect);
|
|
if (max_nsectors < nsectors)
|
|
max_nsectors = nsectors;
|
|
ntracks = dp->dp_ehd + 1;
|
|
if (max_ntracks < ntracks)
|
|
max_ntracks = ntracks;
|
|
}
|
|
|
|
/*
|
|
* Check that we have guessed the geometry right by checking the
|
|
* partition entries.
|
|
*/
|
|
/*
|
|
* TODO:
|
|
* As above.
|
|
* Check for overlaps.
|
|
* Check against d_secperunit if the latter is reliable.
|
|
*/
|
|
error = 0;
|
|
for (dospart = 0, dp = dp0; dospart < NDOSPART; dospart++, dp++) {
|
|
if (dp->dp_scyl == 0 && dp->dp_shd == 0 && dp->dp_ssect == 0
|
|
&& dp->dp_start == 0 && dp->dp_size == 0)
|
|
continue;
|
|
sname = dsname(dname, dkunit(dev), BASE_SLICE + dospart,
|
|
RAW_PART, partname);
|
|
|
|
/*
|
|
* Temporarily ignore errors from this check. We could
|
|
* simplify things by accepting the table eariler if we
|
|
* always ignore errors here. Perhaps we should always
|
|
* accept the table if the magic is right but not let
|
|
* bad entries affect the geometry.
|
|
*/
|
|
check_part(sname, dp, mbr_offset, max_nsectors, max_ntracks,
|
|
mbr_offset);
|
|
}
|
|
if (error != 0)
|
|
goto done;
|
|
|
|
/*
|
|
* Accept the DOS partition table.
|
|
* First adjust the label (we have been careful not to change it
|
|
* before we can guarantee success).
|
|
*/
|
|
secpercyl = (u_long)max_nsectors * max_ntracks;
|
|
if (secpercyl != 0) {
|
|
u_long secperunit;
|
|
|
|
lp->d_nsectors = max_nsectors;
|
|
lp->d_ntracks = max_ntracks;
|
|
lp->d_secpercyl = secpercyl;
|
|
secperunit = secpercyl * max_ncyls;
|
|
if (lp->d_secperunit < secperunit)
|
|
lp->d_secperunit = secperunit;
|
|
lp->d_ncylinders = lp->d_secperunit / secpercyl;
|
|
}
|
|
|
|
/*
|
|
* We are passed a pointer to a suitably initialized minimal
|
|
* slices "struct" with no dangling pointers in it. Replace it
|
|
* by a maximal one. This usually oversizes the "struct", but
|
|
* enlarging it while searching for logical drives would be
|
|
* inconvenient.
|
|
*/
|
|
free(*sspp, M_DEVBUF);
|
|
ssp = dsmakeslicestruct(MAX_SLICES, lp);
|
|
*sspp = ssp;
|
|
|
|
/* Initialize normal slices. */
|
|
sp = &ssp->dss_slices[BASE_SLICE];
|
|
for (dospart = 0, dp = dp0; dospart < NDOSPART; dospart++, dp++, sp++) {
|
|
sp->ds_offset = mbr_offset + dp->dp_start;
|
|
sp->ds_size = dp->dp_size;
|
|
sp->ds_type = dp->dp_typ;
|
|
#if 0
|
|
lp->d_subtype |= (lp->d_subtype & 3) | dospart
|
|
| DSTYPE_INDOSPART;
|
|
#endif
|
|
}
|
|
ssp->dss_nslices = BASE_SLICE + NDOSPART;
|
|
|
|
/* Handle extended partitions. */
|
|
sp -= NDOSPART;
|
|
for (dospart = 0; dospart < NDOSPART; dospart++, sp++)
|
|
if (sp->ds_type == DOSPTYP_EXTENDED ||
|
|
sp->ds_type == DOSPTYP_EXTENDEDX)
|
|
extended(dname, bp->b_dev, strat, lp, ssp,
|
|
sp->ds_offset, sp->ds_size, sp->ds_offset,
|
|
max_nsectors, max_ntracks, mbr_offset);
|
|
|
|
done:
|
|
bp->b_flags |= B_INVAL | B_AGE;
|
|
brelse(bp);
|
|
if (error == EINVAL)
|
|
error = 0;
|
|
return (error);
|
|
}
|
|
|
|
void
|
|
extended(dname, dev, strat, lp, ssp, ext_offset, ext_size, base_ext_offset,
|
|
nsectors, ntracks, mbr_offset)
|
|
char *dname;
|
|
dev_t dev;
|
|
struct disklabel *lp;
|
|
d_strategy_t *strat;
|
|
struct diskslices *ssp;
|
|
u_long ext_offset;
|
|
u_long ext_size;
|
|
u_long base_ext_offset;
|
|
int nsectors;
|
|
int ntracks;
|
|
u_long mbr_offset;
|
|
{
|
|
struct buf *bp;
|
|
u_char *cp;
|
|
int dospart;
|
|
struct dos_partition *dp;
|
|
u_long ext_offsets[NDOSPART];
|
|
u_long ext_sizes[NDOSPART];
|
|
char partname[2];
|
|
int slice;
|
|
char *sname;
|
|
struct diskslice *sp;
|
|
|
|
/* Read extended boot record. */
|
|
bp = geteblk((int)lp->d_secsize);
|
|
bp->b_dev = dev;
|
|
bp->b_blkno = ext_offset;
|
|
bp->b_bcount = lp->d_secsize;
|
|
bp->b_flags |= B_READ;
|
|
(*strat)(bp);
|
|
if (biowait(bp) != 0) {
|
|
diskerr(bp, dname, "error reading extended partition table",
|
|
LOG_PRINTF, 0, (struct disklabel *)NULL);
|
|
printf("\n");
|
|
goto done;
|
|
}
|
|
|
|
/* Weakly verify it. */
|
|
cp = bp->b_data;
|
|
if (cp[0x1FE] != 0x55 || cp[0x1FF] != 0xAA) {
|
|
sname = dsname(dname, dkunit(dev), WHOLE_DISK_SLICE, RAW_PART,
|
|
partname);
|
|
if (bootverbose)
|
|
printf("%s: invalid extended partition table: no magic\n",
|
|
sname);
|
|
goto done;
|
|
}
|
|
|
|
for (dospart = 0,
|
|
dp = (struct dos_partition *)(bp->b_data + DOSPARTOFF),
|
|
slice = ssp->dss_nslices, sp = &ssp->dss_slices[slice];
|
|
dospart < NDOSPART; dospart++, dp++) {
|
|
ext_sizes[dospart] = 0;
|
|
if (dp->dp_scyl == 0 && dp->dp_shd == 0 && dp->dp_ssect == 0
|
|
&& dp->dp_start == 0 && dp->dp_size == 0)
|
|
continue;
|
|
if (dp->dp_typ == DOSPTYP_EXTENDED ||
|
|
dp->dp_typ == DOSPTYP_EXTENDEDX) {
|
|
char buf[32];
|
|
|
|
sname = dsname(dname, dkunit(dev), WHOLE_DISK_SLICE,
|
|
RAW_PART, partname);
|
|
snprintf(buf, sizeof(buf), "%s", sname);
|
|
if (strlen(buf) < sizeof buf - 11)
|
|
strcat(buf, "<extended>");
|
|
check_part(buf, dp, base_ext_offset, nsectors,
|
|
ntracks, mbr_offset);
|
|
ext_offsets[dospart] = base_ext_offset + dp->dp_start;
|
|
ext_sizes[dospart] = dp->dp_size;
|
|
} else {
|
|
sname = dsname(dname, dkunit(dev), slice, RAW_PART,
|
|
partname);
|
|
check_part(sname, dp, ext_offset, nsectors, ntracks,
|
|
mbr_offset);
|
|
if (slice >= MAX_SLICES) {
|
|
printf("%s: too many slices\n", sname);
|
|
slice++;
|
|
continue;
|
|
}
|
|
sp->ds_offset = ext_offset + dp->dp_start;
|
|
sp->ds_size = dp->dp_size;
|
|
sp->ds_type = dp->dp_typ;
|
|
ssp->dss_nslices++;
|
|
slice++;
|
|
sp++;
|
|
}
|
|
}
|
|
|
|
/* If we found any more slices, recursively find all the subslices. */
|
|
for (dospart = 0; dospart < NDOSPART; dospart++)
|
|
if (ext_sizes[dospart] != 0)
|
|
extended(dname, dev, strat, lp, ssp,
|
|
ext_offsets[dospart], ext_sizes[dospart],
|
|
base_ext_offset, nsectors, ntracks,
|
|
mbr_offset);
|
|
|
|
done:
|
|
bp->b_flags |= B_INVAL | B_AGE;
|
|
brelse(bp);
|
|
}
|