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Don't restrict MBR sectorsize to 512 bytes.

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Test data provided by:	Andrey Koklin <aka@veco.ru>
This commit is contained in:
Poul-Henning Kamp 2003-01-11 12:30:51 +00:00
parent 81d89781bd
commit 78b9d70000
1 changed files with 23 additions and 20 deletions
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43
sys/geom/geom_mbr.c
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@ -70,6 +70,17 @@ static struct dos_partition historical_bogus_partition_table_fixed[NDOSPART] = {
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
{ 0x80, 0, 1, 0, DOSPTYP_386BSD, 254, 255, 255, 0, 50000, },
};
static void
g_mbr_print(int i, struct dos_partition *dp)
{
printf("[%d] f:%02x typ:%d", i, dp->dp_flag, dp->dp_typ);
printf(" s(CHS):%d/%d/%d", dp->dp_scyl, dp->dp_shd, dp->dp_ssect);
printf(" e(CHS):%d/%d/%d", dp->dp_ecyl, dp->dp_ehd, dp->dp_esect);
printf(" s:%d l:%d\n", dp->dp_start, dp->dp_size);
}
static void
g_dec_dos_partition(u_char *ptr, struct dos_partition *d)
{
@ -106,6 +117,7 @@ g_enc_dos_partition(u_char *ptr, struct dos_partition *d)
struct g_mbr_softc {
int type [NDOSPART];
u_int sectorsize;
u_char sec0[512];
};
@ -122,10 +134,13 @@ g_mbr_modify(struct g_geom *gp, struct g_mbr_softc *ms, u_char *sec0)
return (EBUSY);
dp = ndp;
for (i = 0; i < NDOSPART; i++)
for (i = 0; i < NDOSPART; i++) {
g_dec_dos_partition(
sec0 + DOSPARTOFF + i * sizeof(struct dos_partition),
dp + i);
if (bootverbose)
g_mbr_print(i, dp + i);
}
if ((!bcmp(dp, historical_bogus_partition_table,
sizeof historical_bogus_partition_table)) ||
(!bcmp(dp, historical_bogus_partition_table_fixed,
@ -158,18 +173,18 @@ g_mbr_modify(struct g_geom *gp, struct g_mbr_softc *ms, u_char *sec0)
else if (dp[i].dp_typ == 0)
l[i] = 0;
else
l[i] = (off_t)dp[i].dp_size << 9ULL;
l[i] = (off_t)dp[i].dp_size * ms->sectorsize;
error = g_slice_config(gp, i, G_SLICE_CONFIG_CHECK,
(off_t)dp[i].dp_start << 9ULL, l[i], 512,
"%ss%d", gp->name, 1 + i);
(off_t)dp[i].dp_start * ms->sectorsize, l[i],
ms->sectorsize, "%ss%d", gp->name, 1 + i);
if (error)
return (error);
}
for (i = 0; i < NDOSPART; i++) {
ms->type[i] = dp[i].dp_typ;
g_slice_config(gp, i, G_SLICE_CONFIG_SET,
(off_t)dp[i].dp_start << 9ULL, l[i], 512,
"%ss%d", gp->name, 1 + i);
(off_t)dp[i].dp_start * ms->sectorsize, l[i],
ms->sectorsize, "%ss%d", gp->name, 1 + i);
}
bcopy(sec0, ms->sec0, 512);
return (0);
@ -285,19 +300,6 @@ g_mbr_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g_
}
}
static void
g_mbr_print(int i, struct dos_partition *dp)
{
g_hexdump(dp, sizeof(dp[0]));
printf("[%d] f:%02x typ:%d", i, dp->dp_flag, dp->dp_typ);
printf(" s(CHS):%d/%d/%d", dp->dp_scyl, dp->dp_shd, dp->dp_ssect);
printf(" e(CHS):%d/%d/%d", dp->dp_ecyl, dp->dp_ehd, dp->dp_esect);
printf(" s:%d l:%d\n", dp->dp_start, dp->dp_size);
}
static struct g_geom *
g_mbr_taste(struct g_class *mp, struct g_provider *pp, int insist)
{
@ -324,8 +326,9 @@ g_mbr_taste(struct g_class *mp, struct g_provider *pp, int insist)
if (error)
fwsectors = 17;
sectorsize = cp->provider->sectorsize;
if (sectorsize != 512)
if (sectorsize < 512)
break;
ms->sectorsize = sectorsize;
gsp->frontstuff = sectorsize * fwsectors;
buf = g_read_data(cp, 0, sectorsize, &error);
if (buf == NULL || error != 0)