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Fixed from Carl Nettelblad

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svn path=/trunk/; revision=1653
This commit is contained in:
David Welch 2001-03-01 07:48:17 +00:00
parent c9a6908fb9
commit a2329a46e9
2 changed files with 99 additions and 36 deletions
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109
reactos/drivers/fs/vfat/fat.c
View file

@ -1,5 +1,5 @@
/* /*
* $Id: fat.c,v 1.18 2001/02/06 20:17:35 dwelch Exp $ * $Id: fat.c,v 1.19 2001/03/01 07:48:17 dwelch Exp $
* *
* COPYRIGHT: See COPYING in the top level directory * COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel * PROJECT: ReactOS kernel
@ -15,7 +15,7 @@
#include <wchar.h> #include <wchar.h>
#include <ntos/minmax.h> #include <ntos/minmax.h>
#define NDEBUG #define NDEBUGN
#include <debug.h> #include <debug.h>
#include "vfat.h" #include "vfat.h"
@ -75,8 +75,7 @@ Fat16GetNextCluster (PDEVICE_EXTENSION DeviceExt,
ULONG CurrentCluster, ULONG CurrentCluster,
PULONG NextCluster) PULONG NextCluster)
/* /*
* FUNCTION: Retrieve the next FAT16 cluster from the FAT table from the * FUNCTION: Retrieve the next FAT16 cluster from the FAT table
* in-memory FAT
*/ */
{ {
PVOID BaseAddress; PVOID BaseAddress;
@ -169,10 +168,10 @@ Fat12GetNextCluster (PDEVICE_EXTENSION DeviceExt,
Entry = (CBlock[FATOffset] >> 4); Entry = (CBlock[FATOffset] >> 4);
Entry |= (CBlock[FATOffset+1] << 4); Entry |= (CBlock[FATOffset+1] << 4);
} }
DPRINT("Entry %x\n",Entry); // DPRINT("Entry %x\n",Entry);
if (Entry >= 0xff8 && Entry <= 0xfff) if (Entry >= 0xff8 && Entry <= 0xfff)
Entry = 0xffffffff; Entry = 0xffffffff;
DPRINT("Returning %x\n",Entry); // DPRINT("Returning %x\n",Entry);
*NextCluster = Entry; *NextCluster = Entry;
CcReleaseCacheSegment(DeviceExt->Fat12StorageBcb, CacheSeg, TRUE); CcReleaseCacheSegment(DeviceExt->Fat12StorageBcb, CacheSeg, TRUE);
return(STATUS_SUCCESS); return(STATUS_SUCCESS);
@ -256,6 +255,7 @@ FAT12FindAvailableCluster (PDEVICE_EXTENSION DeviceExt, PULONG Cluster)
BOOLEAN Valid; BOOLEAN Valid;
PCACHE_SEGMENT CacheSeg; PCACHE_SEGMENT CacheSeg;
NTSTATUS Status; NTSTATUS Status;
ULONG numberofclusters;
*Cluster = 0; *Cluster = 0;
@ -282,7 +282,9 @@ FAT12FindAvailableCluster (PDEVICE_EXTENSION DeviceExt, PULONG Cluster)
} }
CBlock = (PUCHAR)BaseAddress; CBlock = (PUCHAR)BaseAddress;
for (i = 2; i < ((DeviceExt->Boot->FATSectors * 512 * 8) / 12); i++) numberofclusters = ((DeviceExt->Boot->Sectors ? DeviceExt->Boot->Sectors : DeviceExt->Boot->SectorsHuge)-DeviceExt->dataStart)/DeviceExt->Boot->SectorsPerCluster+2;
for (i = 2; i < numberofclusters; i++)
{ {
FATOffset = (i * 12) / 8; FATOffset = (i * 12) / 8;
if ((i % 2) == 0) if ((i % 2) == 0)
@ -299,11 +301,11 @@ FAT12FindAvailableCluster (PDEVICE_EXTENSION DeviceExt, PULONG Cluster)
{ {
DPRINT("Found available cluster 0x%x\n", i); DPRINT("Found available cluster 0x%x\n", i);
*Cluster = i; *Cluster = i;
CcReleaseCacheSegment(DeviceExt->StorageBcb, CacheSeg, TRUE); CcReleaseCacheSegment(DeviceExt->Fat12StorageBcb, CacheSeg, TRUE);
return(STATUS_SUCCESS); return(STATUS_SUCCESS);
} }
} }
CcReleaseCacheSegment(DeviceExt->StorageBcb, CacheSeg, TRUE); CcReleaseCacheSegment(DeviceExt->Fat12StorageBcb, CacheSeg, TRUE);
return (STATUS_DISK_FULL); return (STATUS_DISK_FULL);
} }
@ -315,21 +317,36 @@ FAT32FindAvailableCluster (PDEVICE_EXTENSION DeviceExt, PULONG Cluster)
{ {
ULONG sector; ULONG sector;
PULONG Block; PULONG Block;
int i; int i,forto;
ULONG numberofclusters;
NTSTATUS Status;
Block = ExAllocatePool (NonPagedPool, BLOCKSIZE); Block = ExAllocatePool (NonPagedPool, BLOCKSIZE);
*Cluster = 0; *Cluster = 0;
numberofclusters = ((DeviceExt->Boot->Sectors ? DeviceExt->Boot->Sectors : DeviceExt->Boot->SectorsHuge)-DeviceExt->dataStart)/DeviceExt->Boot->SectorsPerCluster+2;
numberofclusters %= 128;
for (sector = 0; for (sector = 0;
sector < ((struct _BootSector32 *) (DeviceExt->Boot))->FATSectors32; sector < ((struct _BootSector32 *) (DeviceExt->Boot))->FATSectors32;
sector++) sector++)
{ {
/* FIXME: Check status */ Status = VfatReadSectors (DeviceExt->StorageDevice,
VfatReadSectors (DeviceExt->StorageDevice,
(ULONG) (DeviceExt->FATStart + sector), 1, (ULONG) (DeviceExt->FATStart + sector), 1,
(UCHAR *) Block); (UCHAR *) Block);
for (i = 0; i < 512; i++) if (!NT_SUCCESS(Status))
{
ExFreePool (Block);
return(Status);
}
if (sector==((struct _BootSector32 *) (DeviceExt->Boot))->FATSectors32-1)
forto=numberofclusters;
else
forto=128;
for (i = 0; i < forto; i++)
{ {
if (Block[i] == 0) if (Block[i] == 0)
{ {
@ -344,7 +361,7 @@ FAT32FindAvailableCluster (PDEVICE_EXTENSION DeviceExt, PULONG Cluster)
return (STATUS_DISK_FULL); return (STATUS_DISK_FULL);
} }
#if 0
ULONG ULONG
FAT12CountAvailableClusters (PDEVICE_EXTENSION DeviceExt) FAT12CountAvailableClusters (PDEVICE_EXTENSION DeviceExt)
/* /*
@ -353,13 +370,43 @@ FAT12CountAvailableClusters (PDEVICE_EXTENSION DeviceExt)
{ {
ULONG FATOffset; ULONG FATOffset;
ULONG Entry; ULONG Entry;
PUCHAR CBlock = DeviceExt->FAT; PUCHAR CBlock;
ULONG ulCount = 0; ULONG ulCount = 0;
ULONG i; ULONG i;
PVOID BaseAddress;
BOOLEAN Valid;
PCACHE_SEGMENT CacheSeg;
NTSTATUS Status;
ULONG numberofclusters;
ExAcquireResourceSharedLite (&DeviceExt->FatResource, TRUE); ExAcquireResourceSharedLite (&DeviceExt->FatResource, TRUE);
Status = CcRequestCacheSegment(DeviceExt->Fat12StorageBcb,
0,
&BaseAddress,
&Valid,
&CacheSeg);
if (!NT_SUCCESS(Status))
{
ExReleaseResourceLite (&DeviceExt->FatResource);
return 0; // Will the caller understand NTSTATUS values?
}
if (!Valid)
{
Status = VfatReadSectors(DeviceExt->StorageDevice,
DeviceExt->FATStart,
DeviceExt->Boot->FATSectors,
BaseAddress);
if (!NT_SUCCESS(Status))
{
CcReleaseCacheSegment(DeviceExt->Fat12StorageBcb, CacheSeg, FALSE);
ExReleaseResourceLite (&DeviceExt->FatResource);
return 0; // Will the caller understand NTSTATUS values?
}
}
CBlock = (PUCHAR)BaseAddress;
numberofclusters = ((DeviceExt->Boot->Sectors ? DeviceExt->Boot->Sectors : DeviceExt->Boot->SectorsHuge)-DeviceExt->dataStart)/DeviceExt->Boot->SectorsPerCluster+2;
for (i = 2; i < ((DeviceExt->Boot->FATSectors * 512 * 8) / 12); i++) for (i = 2; i < numberofclusters; i++)
{ {
FATOffset = (i * 12) / 8; FATOffset = (i * 12) / 8;
if ((i % 2) == 0) if ((i % 2) == 0)
@ -376,11 +423,13 @@ FAT12CountAvailableClusters (PDEVICE_EXTENSION DeviceExt)
ulCount++; ulCount++;
} }
CcReleaseCacheSegment(DeviceExt->Fat12StorageBcb, CacheSeg, FALSE);
ExReleaseResourceLite (&DeviceExt->FatResource); ExReleaseResourceLite (&DeviceExt->FatResource);
return ulCount; return ulCount;
} }
#if 0
ULONG ULONG
FAT16CountAvailableClusters (PDEVICE_EXTENSION DeviceExt) FAT16CountAvailableClusters (PDEVICE_EXTENSION DeviceExt)
/* /*
@ -415,11 +464,16 @@ FAT32CountAvailableClusters (PDEVICE_EXTENSION DeviceExt)
ULONG sector; ULONG sector;
PULONG Block; PULONG Block;
ULONG ulCount = 0; ULONG ulCount = 0;
ULONG i; ULONG i,forto;
ULONG numberofclusters;
ExAcquireResourceSharedLite (&DeviceExt->FatResource, TRUE); ExAcquireResourceSharedLite (&DeviceExt->FatResource, TRUE);
Block = ExAllocatePool (NonPagedPool, BLOCKSIZE); Block = ExAllocatePool (NonPagedPool, BLOCKSIZE);
numberofclusters = ((DeviceExt->Boot->Sectors ? DeviceExt->Boot->Sectors : DeviceExt->Boot->SectorsHuge)-DeviceExt->dataStart)/DeviceExt->Boot->SectorsPerCluster+2;
numberofclusters %= 128;
for (sector = 0; for (sector = 0;
sector < ((struct _BootSector32 *) (DeviceExt->Boot))->FATSectors32; sector < ((struct _BootSector32 *) (DeviceExt->Boot))->FATSectors32;
sector++) sector++)
@ -429,13 +483,16 @@ FAT32CountAvailableClusters (PDEVICE_EXTENSION DeviceExt)
(ULONG) (DeviceExt->FATStart + sector), 1, (ULONG) (DeviceExt->FATStart + sector), 1,
(UCHAR *) Block); (UCHAR *) Block);
for (i = 0; i < 512; i++) if (sector==((struct _BootSector32 *) (DeviceExt->Boot))->FATSectors32-1)
forto=numberofclusters;
else
forto=128;
for (i = 0; i < forto; i++)
{ {
if (Block[i] == 0) if (Block[i] == 0)
ulCount++; ulCount++;
} }
} }
/* Give an error message (out of disk space) if we reach here) */
ExFreePool (Block); ExFreePool (Block);
ExReleaseResourceLite (&DeviceExt->FatResource); ExReleaseResourceLite (&DeviceExt->FatResource);
return ulCount; return ulCount;
@ -516,7 +573,7 @@ FAT12WriteCluster (PDEVICE_EXTENSION DeviceExt, ULONG ClusterToWrite,
1, CBlock + FATsector * 512); 1, CBlock + FATsector * 512);
} }
} }
CcReleaseCacheSegment(DeviceExt->StorageBcb, CacheSeg, TRUE); CcReleaseCacheSegment(DeviceExt->Fat12StorageBcb, CacheSeg, TRUE);
return(STATUS_SUCCESS); return(STATUS_SUCCESS);
} }
@ -729,8 +786,8 @@ GetNextCluster (PDEVICE_EXTENSION DeviceExt,
{ {
NTSTATUS Status; NTSTATUS Status;
DPRINT ("GetNextCluster(DeviceExt %x, CurrentCluster %x)\n", // DPRINT ("GetNextCluster(DeviceExt %x, CurrentCluster %x)\n",
DeviceExt, CurrentCluster); // DeviceExt, CurrentCluster);
if (Extend) if (Extend)
{ {
@ -760,6 +817,10 @@ GetNextCluster (PDEVICE_EXTENSION DeviceExt,
else if (DeviceExt->FatType == FAT32) else if (DeviceExt->FatType == FAT32)
{ {
Status = FAT32FindAvailableCluster (DeviceExt, &NewCluster); Status = FAT32FindAvailableCluster (DeviceExt, &NewCluster);
if (!NT_SUCCESS(Status))
{
return(Status);
}
} }
else else
{ {
@ -810,6 +871,10 @@ GetNextCluster (PDEVICE_EXTENSION DeviceExt,
else if (DeviceExt->FatType == FAT32) else if (DeviceExt->FatType == FAT32)
{ {
Status = FAT32FindAvailableCluster (DeviceExt, &NewCluster); Status = FAT32FindAvailableCluster (DeviceExt, &NewCluster);
if (!NT_SUCCESS(Status))
{
return(Status);
}
} }
else else
{ {

24
reactos/drivers/fs/vfat/volume.c
View file

@ -1,4 +1,4 @@
/* $Id: volume.c,v 1.6 2001/01/12 21:00:08 dwelch Exp $ /* $Id: volume.c,v 1.7 2001/03/01 07:48:17 dwelch Exp $
* *
* COPYRIGHT: See COPYING in the top level directory * COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel * PROJECT: ReactOS kernel
@ -83,13 +83,11 @@ FsdGetFsSizeInformation (PDEVICE_OBJECT DeviceObject,
struct _BootSector32 *BootSect = struct _BootSector32 *BootSect =
(struct _BootSector32 *) DeviceExt->Boot; (struct _BootSector32 *) DeviceExt->Boot;
if (BootSect->Sectors) FsSizeInfo->TotalAllocationUnits.QuadPart = ((BootSect->Sectors ? BootSect->Sectors : BootSect->SectorsHuge)-DeviceExt->dataStart)/BootSect->SectorsPerCluster;
FsSizeInfo->TotalAllocationUnits.QuadPart = BootSect->Sectors;
else
FsSizeInfo->TotalAllocationUnits.QuadPart = BootSect->SectorsHuge;
/* FsSizeInfo->AvailableAllocationUnits.QuadPart =
FAT32CountAvailableClusters (DeviceExt); */
FsSizeInfo->AvailableAllocationUnits.QuadPart = FAT32CountAvailableClusters (DeviceExt);
FsSizeInfo->SectorsPerAllocationUnit = BootSect->SectorsPerCluster; FsSizeInfo->SectorsPerAllocationUnit = BootSect->SectorsPerCluster;
FsSizeInfo->BytesPerSector = BootSect->BytesPerSector; FsSizeInfo->BytesPerSector = BootSect->BytesPerSector;
@ -98,18 +96,18 @@ FsdGetFsSizeInformation (PDEVICE_OBJECT DeviceObject,
{ {
struct _BootSector *BootSect = (struct _BootSector *) DeviceExt->Boot; struct _BootSector *BootSect = (struct _BootSector *) DeviceExt->Boot;
if (BootSect->Sectors) FsSizeInfo->TotalAllocationUnits.QuadPart = ((BootSect->Sectors ? BootSect->Sectors : BootSect->SectorsHuge)-DeviceExt->dataStart)/BootSect->SectorsPerCluster;
FsSizeInfo->TotalAllocationUnits.QuadPart = BootSect->Sectors;
else
FsSizeInfo->TotalAllocationUnits.QuadPart = BootSect->SectorsHuge;
/*
if (DeviceExt->FatType == FAT16) if (DeviceExt->FatType == FAT16)
FsSizeInfo->AvailableAllocationUnits.QuadPart = FsSizeInfo->AvailableAllocationUnits.QuadPart =
#if 0
FAT16CountAvailableClusters (DeviceExt); FAT16CountAvailableClusters (DeviceExt);
#else
0;
#endif
else else
FsSizeInfo->AvailableAllocationUnits.QuadPart = FsSizeInfo->AvailableAllocationUnits.QuadPart =
FAT12CountAvailableClusters (DeviceExt); FAT12CountAvailableClusters (DeviceExt);
*/
FsSizeInfo->SectorsPerAllocationUnit = BootSect->SectorsPerCluster; FsSizeInfo->SectorsPerAllocationUnit = BootSect->SectorsPerCluster;
FsSizeInfo->BytesPerSector = BootSect->BytesPerSector; FsSizeInfo->BytesPerSector = BootSect->BytesPerSector;
} }