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Suppress spurious warning on 1022 cylinder LBA partition and optimise a bit

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git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/branches/UNSTABLE@1110 6ac86273-5f31-0410-b378-82cca8765d1b
This commit is contained in:
Luchezar Georgiev 2005-02-02 07:47:34 +00:00
parent 304aaa1428
commit 30ac4c1a01
1 changed files with 45 additions and 78 deletions
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113
kernel/initdisk.c
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@ -348,6 +348,13 @@ void printCHS(char *title, struct CHS *chs)
printf("%s%4u-%u-%u", title, chs->Cylinder, chs->Head, chs->Sector);
}
STATIC VOID printStartEnd(struct CHS *chs, struct CHS *end)
{
printCHS(" start ", chs);
printCHS(", end ", end);
printf("\n");
}
/*
reason for this modules existence:
@ -807,66 +814,45 @@ BOOL ConvPartTableEntryToIntern(struct PartTableEntry * pEntry,
return TRUE;
}
BOOL is_suspect(struct CHS *chs, struct CHS *pEntry_chs)
{
/* Valid entry:
entry == chs || // partition entry equal to computed values
(chs->Cylinder > 1023 && // or LBA partition
(entry->Cylinder == 1023 ||
entry->Cylinder == (0x3FF & chs->Cylinder)))
*/
return !((pEntry_chs->Cylinder == chs->Cylinder &&
pEntry_chs->Head == chs->Head &&
pEntry_chs->Sector == chs->Sector) ||
chs->Cylinder > 1023u &&
(pEntry_chs->Cylinder == 1023 ||
pEntry_chs->Cylinder == (0x3ff & chs->Cylinder)));
}
void print_warning_suspect(char *partitionName, UBYTE fs, struct CHS *chs,
STATIC void warning_suspect(char *partitionName, struct CHS *chs,
struct CHS *pEntry_chs)
{
printf("WARNING: using suspect partition %s FS %02x:", partitionName, fs);
printCHS(" with calculated values ", chs);
printCHS(" instead of ", pEntry_chs);
if (pEntry_chs->Cylinder != (chs->Cylinder & 0x3FF)
|| pEntry_chs->Head != chs->Head
|| pEntry_chs->Sector != chs->Sector)
{
printf("WARNING: %s", partitionName);
printCHS(" has CHS=", chs);
printCHS(", not ", pEntry_chs);
printf("\n");
memcpy(pEntry_chs, chs, sizeof(struct CHS));
}
}
BOOL ScanForPrimaryPartitions(struct DriveParamS * driveParam, int scan_type,
int ScanForPrimaryPartitions(struct DriveParamS * driveParam, int scan_type,
struct PartTableEntry * pEntry, ULONG startSector,
int partitionsToIgnore, int extendedPartNo)
{
int i;
struct CHS chs, end;
ULONG partitionStart;
char partitionName[12];
char partitionName[28];
for (i = 0; i < 4; i++, pEntry++)
{
if (pEntry->FileSystem == 0)
continue;
if (partitionsToIgnore & (1 << i))
continue;
if (IsExtPartition(pEntry->FileSystem))
continue;
if (scan_type == SCAN_PRIMARYBOOT && !pEntry->Bootable)
if (pEntry->FileSystem == 0
|| partitionsToIgnore & (1 << i)
|| IsExtPartition(pEntry->FileSystem)
|| scan_type == SCAN_PRIMARYBOOT && !pEntry->Bootable
|| !IsFATPartition(pEntry->FileSystem))
continue;
partitionStart = startSector + pEntry->RelSect;
if (!IsFATPartition(pEntry->FileSystem))
{
continue;
}
if (extendedPartNo)
sprintf(partitionName, "Ext:%d", extendedPartNo);
else
sprintf(partitionName, "Pri:%d", i + 1);
sprintf(partitionName, "partition %s:%d FS %02x",
extendedPartNo ? "Ext" : "Pri",
extendedPartNo ? extendedPartNo : i + 1,
pEntry->FileSystem);
/*
some sanity checks, that partition
@ -876,39 +862,25 @@ BOOL ScanForPrimaryPartitions(struct DriveParamS * driveParam, int scan_type,
LBA_to_CHS(&end, partitionStart + pEntry->NumSect - 1, driveParam);
/* some FDISK's enter for partitions
> 8 GB cyl = 1023, other (cyl&1023)
> 8 GB cyl = 1022 or 1023, other (cyl&1023)
*/
if (is_suspect(&chs, &pEntry->Begin))
if (!IsLBAPartition(pEntry->FileSystem))
{
print_warning_suspect(partitionName, pEntry->FileSystem, &chs,
&pEntry->Begin);
warning_suspect(partitionName, &chs, &pEntry->Begin);
warning_suspect(partitionName, &end, &pEntry->End);
}
if (is_suspect(&end, &pEntry->End))
{
if (pEntry->NumSect == 0)
{
printf("Not using partition %s with 0 sectors\n", partitionName);
printf("Not using %s with 0 sectors\n", partitionName);
continue;
}
print_warning_suspect(partitionName, pEntry->FileSystem, &end,
&pEntry->End);
}
if (chs.Cylinder > 1023 || end.Cylinder > 1023)
{
if (!(driveParam->descflags & DF_LBA))
{
printf
("can't use LBA partition without LBA support - part %s FS %02x",
partitionName, pEntry->FileSystem);
printCHS(" start ", &chs);
printCHS(", end ", &end);
printf("\n");
printf("Can't use LBA %s without LBA support", partitionName);
printStartEnd(&chs, &end);
continue;
}
@ -916,13 +888,10 @@ BOOL ScanForPrimaryPartitions(struct DriveParamS * driveParam, int scan_type,
&& !IsLBAPartition(pEntry->FileSystem))
{
printf
("WARNING: Partition ID does not suggest LBA - part %s FS %02x.\n"
("WARNING: %s is not LBA\n"
"Please run FDISK to correct this - using LBA to access partition.\n",
partitionName, pEntry->FileSystem);
printCHS(" start ", &chs);
printCHS(", end ", &end);
printf("\n");
partitionName);
printStartEnd(&chs, &end);
pEntry->FileSystem = (pEntry->FileSystem == FAT12 ? FAT12_LBA :
pEntry->FileSystem == FAT32 ? FAT32_LBA :
/* pEntry->FileSystem == FAT16 ? */
@ -931,11 +900,9 @@ BOOL ScanForPrimaryPartitions(struct DriveParamS * driveParam, int scan_type,
/* else its a diagnostic message only */
#ifdef DEBUG
printf("found and using LBA partition %s FS %02x",
partitionName, pEntry->FileSystem);
printCHS(" start ", &chs);
printCHS(", end ", &end);
printf("\n");
printf("found and using LBA %s",
partitionName);
printStartEnd(&chs, &end);
#endif
}