/*
* 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.
*
* We would like to check if each MBR has a valid DOSMBR_SIGNATURE, but
* we cannot because it doesn't always exist. So.. we assume the
* MBR is valid.
*/
int
readdisklabel(dev_t dev, void (*strat)(struct buf *),
struct disklabel *lp, int spoofonly)
{
bios_diskinfo_t *pdi;
struct buf *bp = NULL;
dev_t devno;
int error;
if ((error = initdisklabel(lp)))
goto done;
/* Look for any BIOS geometry information we should honour. */
devno = chrtoblk(dev);
if (devno == NODEV)
devno = dev;
pdi = bios_getdiskinfo(MAKEBOOTDEV(major(devno), 0, 0, DISKUNIT(devno),
RAW_PART));
if (pdi != NULL && pdi->bios_heads > 0 && pdi->bios_sectors > 0) {
#ifdef DEBUG
printf("Disk GEOM %u/%u/%u -> BIOS GEOM %u/%u/%u\n",
lp->d_ntracks, lp->d_nsectors, lp->d_ncylinders,
pdi->bios_heads, pdi->bios_sectors,
DL_GETDSIZE(lp) / (pdi->bios_heads * pdi->bios_sectors));
#endif
lp->d_ntracks = pdi->bios_heads;
lp->d_nsectors = pdi->bios_sectors;
lp->d_secpercyl = pdi->bios_sectors * pdi->bios_heads;
lp->d_ncylinders = DL_GETDSIZE(lp) / lp->d_secpercyl;
}
/* get a buffer and initialize it */
bp = geteblk((int)lp->d_secsize);
bp->b_dev = dev;
error = readdoslabel(bp, strat, lp, NULL, spoofonly);
if (error == 0)
goto done;
#if defined(CD9660)
error = iso_disklabelspoof(dev, strat, lp);
if (error == 0)
goto done;
#endif
#if defined(UDF)
error = udf_disklabelspoof(dev, strat, lp);
if (error == 0)
goto done;
#endif
done:
if (bp) {
bp->b_flags |= B_INVAL;
brelse(bp);
}
disk_change = 1;
return (error);
}
/*
* 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.
*/
int
readdisklabel(dev_t dev, void (*strat)(struct buf *),
struct disklabel *lp, int spoofonly)
{
struct buf *bp = NULL;
int error;
if ((error = initdisklabel(lp)))
goto done;
/* 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;
CLR(bp->b_flags, B_READ | B_WRITE | B_DONE);
SET(bp->b_flags, B_BUSY | B_READ | B_RAW);
(*strat)(bp);
if (biowait(bp)) {
error = bp->b_error;
goto done;
}
error = checkdisklabel(bp->b_data + LABELOFFSET, lp, 0,
DL_GETDSIZE(lp));
if (error == 0)
goto done;
doslabel:
error = readdoslabel(bp, strat, lp, NULL, spoofonly);
if (error == 0)
goto done;
#if defined(CD9660)
error = iso_disklabelspoof(dev, strat, lp);
if (error == 0)
goto done;
#endif
#if defined(UDF)
error = udf_disklabelspoof(dev, strat, lp);
if (error == 0)
goto done;
#endif
done:
if (bp) {
bp->b_flags |= B_INVAL;
brelse(bp);
}
disk_change = 1;
return (error);
}
/*
* 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.
*/
int
readdisklabel(dev_t dev, void (*strat)(struct buf *),
struct disklabel *lp, int spoofonly)
{
struct sun_disklabel *slp;
struct buf *bp = NULL;
int error;
if ((error = initdisklabel(lp)))
goto done;
lp->d_flags |= D_VENDOR;
/* get a buffer and initialize it */
bp = geteblk((int)lp->d_secsize);
bp->b_dev = dev;
if (spoofonly)
goto done;
error = readdisksector(bp, strat, lp, DL_BLKTOSEC(lp, LABELSECTOR));
if (error)
goto done;
slp = (struct sun_disklabel *)bp->b_data;
if (slp->sl_magic == SUN_DKMAGIC) {
error = disklabel_om_to_bsd(slp, lp);
goto done;
}
error = checkdisklabel(bp->b_data + LABELOFFSET, lp, 0,
DL_GETDSIZE(lp));
if (error == 0)
goto done;
#if defined(CD9660)
error = iso_disklabelspoof(dev, strat, lp);
if (error == 0)
goto done;
#endif
#if defined(UDF)
error = udf_disklabelspoof(dev, strat, lp);
if (error == 0)
goto done;
#endif
done:
if (bp) {
bp->b_flags |= B_INVAL;
brelse(bp);
}
disk_change = 1;
return (error);
}
/*
* 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.
*/
int
readdisklabel(dev_t dev, void (*strat)(struct buf *),
struct disklabel *lp, int spoofonly)
{
struct buf *bp = NULL;
int error;
if ((error = initdisklabel(lp)))
goto done;
/* get a buffer and initialize it */
bp = geteblk((int)lp->d_secsize);
bp->b_dev = dev;
/* don't read the on-disk label if we are in spoofed-only mode */
if (spoofonly)
goto done;
bp->b_blkno = LABELSECTOR;
bp->b_bcount = lp->d_secsize;
CLR(bp->b_flags, B_READ | B_WRITE | B_DONE);
SET(bp->b_flags, B_BUSY | B_READ | B_RAW);
(*strat)(bp);
if (biowait(bp)) {
error = bp->b_error;
goto done;
}
error = cputobsdlabel(lp, (struct mvmedisklabel *)bp->b_data);
if (error == 0)
goto done;
#if defined(CD9660)
error = iso_disklabelspoof(dev, strat, lp);
if (error == 0)
goto done;
#endif
#if defined(UDF)
error = udf_disklabelspoof(dev, strat, lp);
if (error == 0)
goto done;
#endif
done:
if (bp) {
bp->b_flags |= B_INVAL;
brelse(bp);
}
disk_change = 1;
return (error);
}
/*
* 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.
*/
int
readdisklabel(dev_t dev, void (*strat)(struct buf *), struct disklabel *lp,
int spoofonly)
{
struct buf *bp = NULL;
int error;
if ((error = initdisklabel(lp)))
goto done;
bp = geteblk((int)lp->d_secsize);
bp->b_dev = dev;
/*
* Check for a VDIT or native-in-VDM label first.
* If a valid VDM signature is found, but neither a VDIT nor a
* native label are found, do not attempt to check for any other
* label scheme.
*/
error = readvdmlabel(bp, strat, lp, NULL, spoofonly);
if (error == 0)
goto done;
if (error == ENOENT) {
error = EINVAL;
goto done;
}
error = readdoslabel(bp, strat, lp, NULL, spoofonly);
if (error == 0)
goto done;
#if defined(CD9660)
error = iso_disklabelspoof(dev, strat, lp);
if (error == 0)
goto done;
#endif
#if defined(UDF)
error = udf_disklabelspoof(dev, strat, lp);
if (error == 0)
goto done;
#endif
done:
if (bp) {
bp->b_flags |= B_INVAL;
brelse(bp);
}
disk_change = 1;
return (error);
}
/*
* 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.
*
* Returns null on success and an error string on failure.
*/
const char *
readdisklabel(dev_t dev, void (*strat)(struct buf *), struct disklabel *lp,
struct cpu_disklabel *osdep)
{
int spoofonly = 0;
struct buf *bp = NULL;
const char *msg = "no disk label";
int i;
struct disklabel fallbacklabel;
/* minimal requirements for archetypal disk label */
if (lp->d_secsize == 0)
lp->d_secsize = DEV_BSIZE;
if (lp->d_secperunit == 0)
lp->d_secperunit = 0x1fffffff;
if (lp->d_secpercyl == 0)
return "invalid geometry";
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;
fallbacklabel = *lp;
/* get a buffer and initialize it */
bp = geteblk((int)lp->d_secsize);
bp->b_dev = dev;
msg = readliflabel(bp, strat, lp, osdep, 0, 0, spoofonly);
#if defined(CD9660)
if (msg && iso_disklabelspoof(dev, strat, lp) == 0)
msg = NULL;
#endif
/* If there was an error, still provide a decent fake one. */
if (msg)
*lp = fallbacklabel;
if (bp) {
brelse(bp, BC_INVAL);
}
return (msg);
}
/*
* 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.
*/
int
readdisklabel(dev_t dev, void (*strat)(struct buf *),
struct disklabel *lp, int spoofonly)
{
struct buf *bp = NULL;
int error;
if ((error = initdisklabel(lp)))
goto done;
lp->d_flags |= D_VENDOR;
/* get a buffer and initialize it */
bp = geteblk((int)lp->d_secsize);
bp->b_dev = dev;
error = readsgilabel(bp, strat, lp, NULL, spoofonly);
if (error == 0)
goto done;
error = readdoslabel(bp, strat, lp, NULL, spoofonly);
if (error == 0)
goto done;
#if defined(CD9660)
error = iso_disklabelspoof(dev, strat, lp);
if (error == 0)
goto done;
#endif
#if defined(UDF)
error = udf_disklabelspoof(dev, strat, lp);
if (error == 0)
goto done;
#endif
done:
if (bp) {
bp->b_flags |= B_INVAL;
brelse(bp);
}
disk_change = 1;
return (error);
}
/*
* 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.
*/
int
readdisklabel(dev_t dev, void (*strat)(struct buf *),
struct disklabel *lp, int spoofonly)
{
struct sun_disklabel *slp;
struct buf *bp = NULL;
int error;
if ((error = initdisklabel(lp)))
goto done;
lp->d_flags |= D_VENDOR;
/*
* 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 its 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 buffer and initialize it */
bp = geteblk((int)lp->d_secsize);
bp->b_dev = dev;
if (spoofonly)
goto doslabel;
error = readdisksector(bp, strat, lp, DL_BLKTOSEC(lp, LABELSECTOR));
if (error)
goto done;
slp = (struct sun_disklabel *)bp->b_data;
if (slp->sl_magic == SUN_DKMAGIC) {
error = disklabel_sun_to_bsd(slp, lp);
goto done;
}
error = checkdisklabel(bp->b_data + LABELOFFSET, lp, 0, DL_GETDSIZE(lp));
if (error == 0)
goto done;
doslabel:
error = readdoslabel(bp, strat, lp, NULL, spoofonly);
if (error == 0)
goto done;
/* A CD9660/UDF label may be on a non-CD drive, so recheck */
#if defined(CD9660)
error = iso_disklabelspoof(dev, strat, lp);
if (error == 0)
goto done;
#endif
#if defined(UDF)
error = udf_disklabelspoof(dev, strat, lp);
if (error == 0)
goto done;
#endif
done:
if (bp) {
bp->b_flags |= B_INVAL;
brelse(bp);
}
disk_change = 1;
return (error);
}
