/* INCLUDES *****************************************************************/
-#define NDEBUG
#include "vfat.h"
+#define NDEBUG
+#include <debug.h>
+
+extern VFAT_DISPATCH FatXDispatch;
+extern VFAT_DISPATCH FatDispatch;
+
/* FUNCTIONS ****************************************************************/
#define CACHEPAGESIZE(pDeviceExt) ((pDeviceExt)->FatInfo.BytesPerCluster > PAGE_SIZE ? \
(pDeviceExt)->FatInfo.BytesPerCluster : PAGE_SIZE)
-static NTSTATUS
-VfatHasFileSystem(PDEVICE_OBJECT DeviceToMount,
- PBOOLEAN RecognizedFS,
- PFATINFO pFatInfo)
+static
+NTSTATUS
+VfatHasFileSystem(
+ PDEVICE_OBJECT DeviceToMount,
+ PBOOLEAN RecognizedFS,
+ PFATINFO pFatInfo,
+ BOOLEAN Override)
{
- NTSTATUS Status;
- PARTITION_INFORMATION PartitionInfo;
- DISK_GEOMETRY DiskGeometry;
- FATINFO FatInfo;
- ULONG Size;
- ULONG Sectors;
- LARGE_INTEGER Offset;
- struct _BootSector* Boot;
- struct _BootSectorFatX* BootFatX;
- BOOLEAN PartitionInfoIsValid = FALSE;
-
- DPRINT("VfatHasFileSystem\n");
-
- *RecognizedFS = FALSE;
-
- Size = sizeof(DISK_GEOMETRY);
- Status = VfatBlockDeviceIoControl(DeviceToMount,
- IOCTL_DISK_GET_DRIVE_GEOMETRY,
- NULL,
- 0,
- &DiskGeometry,
- &Size,
- FALSE);
- if (!NT_SUCCESS(Status))
- {
- DPRINT("VfatBlockDeviceIoControl faild (%x)\n", Status);
- return Status;
- }
- FatInfo.FixedMedia = DiskGeometry.MediaType == FixedMedia ? TRUE : FALSE;
- if (DiskGeometry.MediaType == FixedMedia || DiskGeometry.MediaType == RemovableMedia)
- {
- // We have found a hard disk
- Size = sizeof(PARTITION_INFORMATION);
- Status = VfatBlockDeviceIoControl(DeviceToMount,
- IOCTL_DISK_GET_PARTITION_INFO,
- NULL,
- 0,
- &PartitionInfo,
- &Size,
- FALSE);
- if (!NT_SUCCESS(Status))
- {
- DPRINT("VfatBlockDeviceIoControl faild (%x)\n", Status);
- return Status;
- }
- PartitionInfoIsValid = TRUE;
- DPRINT("Partition Information:\n");
- DPRINT("StartingOffset %I64u\n", PartitionInfo.StartingOffset.QuadPart / 512);
- DPRINT("PartitionLength %I64u\n", PartitionInfo.PartitionLength.QuadPart / 512);
- DPRINT("HiddenSectors %u\n", PartitionInfo.HiddenSectors);
- DPRINT("PartitionNumber %u\n", PartitionInfo.PartitionNumber);
- DPRINT("PartitionType %u\n", PartitionInfo.PartitionType);
- DPRINT("BootIndicator %u\n", PartitionInfo.BootIndicator);
- DPRINT("RecognizedPartition %u\n", PartitionInfo.RecognizedPartition);
- DPRINT("RewritePartition %u\n", PartitionInfo.RewritePartition);
- if (PartitionInfo.PartitionType)
- {
- if (PartitionInfo.PartitionType == PARTITION_FAT_12 ||
- PartitionInfo.PartitionType == PARTITION_FAT_16 ||
- PartitionInfo.PartitionType == PARTITION_HUGE ||
- PartitionInfo.PartitionType == PARTITION_FAT32 ||
- PartitionInfo.PartitionType == PARTITION_FAT32_XINT13 ||
- PartitionInfo.PartitionType == PARTITION_XINT13)
- {
+ NTSTATUS Status;
+ PARTITION_INFORMATION PartitionInfo;
+ DISK_GEOMETRY DiskGeometry;
+ FATINFO FatInfo;
+ ULONG Size;
+ ULONG Sectors;
+ LARGE_INTEGER Offset;
+ struct _BootSector* Boot;
+ struct _BootSectorFatX* BootFatX;
+ BOOLEAN PartitionInfoIsValid = FALSE;
+
+ DPRINT("VfatHasFileSystem\n");
+
+ *RecognizedFS = FALSE;
+
+ Size = sizeof(DISK_GEOMETRY);
+ Status = VfatBlockDeviceIoControl(DeviceToMount,
+ IOCTL_DISK_GET_DRIVE_GEOMETRY,
+ NULL,
+ 0,
+ &DiskGeometry,
+ &Size,
+ Override);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT("VfatBlockDeviceIoControl failed (%x)\n", Status);
+ return Status;
+ }
+
+ FatInfo.FixedMedia = DiskGeometry.MediaType == FixedMedia ? TRUE : FALSE;
+ if (DiskGeometry.MediaType == FixedMedia || DiskGeometry.MediaType == RemovableMedia)
+ {
+ // We have found a hard disk
+ Size = sizeof(PARTITION_INFORMATION);
+ Status = VfatBlockDeviceIoControl(DeviceToMount,
+ IOCTL_DISK_GET_PARTITION_INFO,
+ NULL,
+ 0,
+ &PartitionInfo,
+ &Size,
+ Override);
+ if (!NT_SUCCESS(Status))
+ {
+ DPRINT("VfatBlockDeviceIoControl failed (%x)\n", Status);
+ return Status;
+ }
+
+ DPRINT("Partition Information:\n");
+ DPRINT("StartingOffset %I64x\n", PartitionInfo.StartingOffset.QuadPart / 512);
+ DPRINT("PartitionLength %I64x\n", PartitionInfo.PartitionLength.QuadPart / 512);
+ DPRINT("HiddenSectors %u\n", PartitionInfo.HiddenSectors);
+ DPRINT("PartitionNumber %u\n", PartitionInfo.PartitionNumber);
+ DPRINT("PartitionType %u\n", PartitionInfo.PartitionType);
+ DPRINT("BootIndicator %u\n", PartitionInfo.BootIndicator);
+ DPRINT("RecognizedPartition %u\n", PartitionInfo.RecognizedPartition);
+ DPRINT("RewritePartition %u\n", PartitionInfo.RewritePartition);
+ if (PartitionInfo.PartitionType)
+ {
+ if (PartitionInfo.PartitionType == PARTITION_FAT_12 ||
+ PartitionInfo.PartitionType == PARTITION_FAT_16 ||
+ PartitionInfo.PartitionType == PARTITION_HUGE ||
+ PartitionInfo.PartitionType == PARTITION_FAT32 ||
+ PartitionInfo.PartitionType == PARTITION_FAT32_XINT13 ||
+ PartitionInfo.PartitionType == PARTITION_XINT13)
+ {
+ PartitionInfoIsValid = TRUE;
+ *RecognizedFS = TRUE;
+ }
+ }
+ else if (DiskGeometry.MediaType == RemovableMedia &&
+ PartitionInfo.PartitionNumber > 0 &&
+ PartitionInfo.StartingOffset.QuadPart == 0 &&
+ PartitionInfo.PartitionLength.QuadPart > 0)
+ {
+ /* This is possible a removable media formated as super floppy */
+ PartitionInfoIsValid = TRUE;
*RecognizedFS = TRUE;
- }
- }
- else if (DiskGeometry.MediaType == RemovableMedia &&
- PartitionInfo.PartitionNumber > 0 &&
- PartitionInfo.StartingOffset.QuadPart == 0 &&
- PartitionInfo.PartitionLength.QuadPart > 0)
- {
- /* This is possible a removable media formated as super floppy */
- *RecognizedFS = TRUE;
- }
- }
- else if (DiskGeometry.MediaType == Unknown)
- {
- /*
- * Floppy disk driver can return Unknown as media type if it
- * doesn't know yet what floppy in the drive really is. This is
- * perfectly correct to do under Windows.
- */
- *RecognizedFS = TRUE;
- DiskGeometry.BytesPerSector = 512;
- }
- else
- {
- *RecognizedFS = TRUE;
- }
- if (*RecognizedFS)
- {
-
- Boot = ExAllocatePoolWithTag(NonPagedPool, DiskGeometry.BytesPerSector, TAG_VFAT);
- if (Boot == NULL)
- {
- return STATUS_INSUFFICIENT_RESOURCES;
- }
-
- Offset.QuadPart = 0;
-
- /* Try to recognize FAT12/FAT16/FAT32 partitions */
- Status = VfatReadDisk(DeviceToMount, &Offset, DiskGeometry.BytesPerSector, (PUCHAR) Boot, FALSE);
- if (NT_SUCCESS(Status))
- {
- if (Boot->Signatur1 != 0xaa55)
- {
- *RecognizedFS = FALSE;
- }
- if (*RecognizedFS &&
- Boot->BytesPerSector != 512 &&
- Boot->BytesPerSector != 1024 &&
- Boot->BytesPerSector != 2048 &&
- Boot->BytesPerSector != 4096)
- {
- DPRINT1("BytesPerSector %d\n", Boot->BytesPerSector);
- *RecognizedFS = FALSE;
- }
-
- if (*RecognizedFS &&
- Boot->FATCount != 1 &&
- Boot->FATCount != 2)
- {
- DPRINT1("FATCount %d\n", Boot->FATCount);
- *RecognizedFS = FALSE;
- }
-
- if (*RecognizedFS &&
- Boot->Media != 0xf0 &&
- Boot->Media != 0xf8 &&
- Boot->Media != 0xf9 &&
- Boot->Media != 0xfa &&
- Boot->Media != 0xfb &&
- Boot->Media != 0xfc &&
- Boot->Media != 0xfd &&
- Boot->Media != 0xfe &&
- Boot->Media != 0xff)
- {
- DPRINT1("Media %02x\n", Boot->Media);
- *RecognizedFS = FALSE;
- }
-
- if (*RecognizedFS &&
- Boot->SectorsPerCluster != 1 &&
- Boot->SectorsPerCluster != 2 &&
- Boot->SectorsPerCluster != 4 &&
- Boot->SectorsPerCluster != 8 &&
- Boot->SectorsPerCluster != 16 &&
- Boot->SectorsPerCluster != 32 &&
- Boot->SectorsPerCluster != 64 &&
- Boot->SectorsPerCluster != 128)
- {
- DPRINT1("SectorsPerCluster %02x\n", Boot->SectorsPerCluster);
- *RecognizedFS = FALSE;
- }
-
- if (*RecognizedFS &&
- Boot->BytesPerSector * Boot->SectorsPerCluster > 32 * 1024)
- {
- DPRINT1("ClusterSize %dx\n", Boot->BytesPerSector * Boot->SectorsPerCluster);
- *RecognizedFS = FALSE;
- }
-
- if (*RecognizedFS)
- {
- FatInfo.VolumeID = Boot->VolumeID;
- FatInfo.FATStart = Boot->ReservedSectors;
- FatInfo.FATCount = Boot->FATCount;
- FatInfo.FATSectors = Boot->FATSectors ? Boot->FATSectors : ((struct _BootSector32*) Boot)->FATSectors32;
- FatInfo.BytesPerSector = Boot->BytesPerSector;
- FatInfo.SectorsPerCluster = Boot->SectorsPerCluster;
- FatInfo.BytesPerCluster = FatInfo.BytesPerSector * FatInfo.SectorsPerCluster;
- FatInfo.rootDirectorySectors = ((Boot->RootEntries * 32) + Boot->BytesPerSector - 1) / Boot->BytesPerSector;
- FatInfo.rootStart = FatInfo.FATStart + FatInfo.FATCount * FatInfo.FATSectors;
- FatInfo.dataStart = FatInfo.rootStart + FatInfo.rootDirectorySectors;
- FatInfo.Sectors = Sectors = Boot->Sectors ? Boot->Sectors : Boot->SectorsHuge;
- Sectors -= Boot->ReservedSectors + FatInfo.FATCount * FatInfo.FATSectors + FatInfo.rootDirectorySectors;
- FatInfo.NumberOfClusters = Sectors / Boot->SectorsPerCluster;
- if (FatInfo.NumberOfClusters < 4085)
+ }
+ }
+ else
+ {
+ *RecognizedFS = TRUE;
+ }
+
+ if (*RecognizedFS)
+ {
+ Boot = ExAllocatePoolWithTag(NonPagedPool, DiskGeometry.BytesPerSector, TAG_VFAT);
+ if (Boot == NULL)
+ {
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ Offset.QuadPart = 0;
+
+ /* Try to recognize FAT12/FAT16/FAT32 partitions */
+ Status = VfatReadDisk(DeviceToMount, &Offset, DiskGeometry.BytesPerSector, (PUCHAR) Boot, Override);
+ if (NT_SUCCESS(Status))
+ {
+ if (Boot->Signatur1 != 0xaa55)
{
- DPRINT("FAT12\n");
- FatInfo.FatType = FAT12;
- FatInfo.RootCluster = (FatInfo.rootStart - 1) / FatInfo.SectorsPerCluster;
+ *RecognizedFS = FALSE;
}
- else if (FatInfo.NumberOfClusters >= 65525)
+
+ if (*RecognizedFS &&
+ Boot->BytesPerSector != 512 &&
+ Boot->BytesPerSector != 1024 &&
+ Boot->BytesPerSector != 2048 &&
+ Boot->BytesPerSector != 4096)
{
- DPRINT("FAT32\n");
- FatInfo.FatType = FAT32;
- FatInfo.RootCluster = ((struct _BootSector32*) Boot)->RootCluster;
- FatInfo.rootStart = FatInfo.dataStart + ((FatInfo.RootCluster - 2) * FatInfo.SectorsPerCluster);
- FatInfo.VolumeID = ((struct _BootSector32*) Boot)->VolumeID;
+ DPRINT1("BytesPerSector %u\n", Boot->BytesPerSector);
+ *RecognizedFS = FALSE;
}
- else
+
+ if (*RecognizedFS &&
+ Boot->FATCount != 1 &&
+ Boot->FATCount != 2)
{
- DPRINT("FAT16\n");
- FatInfo.FatType = FAT16;
- FatInfo.RootCluster = FatInfo.rootStart / FatInfo.SectorsPerCluster;
+ DPRINT1("FATCount %u\n", Boot->FATCount);
+ *RecognizedFS = FALSE;
}
- if (PartitionInfoIsValid &&
- FatInfo.Sectors > PartitionInfo.PartitionLength.QuadPart / FatInfo.BytesPerSector)
+
+ if (*RecognizedFS &&
+ Boot->Media != 0xf0 &&
+ Boot->Media != 0xf8 &&
+ Boot->Media != 0xf9 &&
+ Boot->Media != 0xfa &&
+ Boot->Media != 0xfb &&
+ Boot->Media != 0xfc &&
+ Boot->Media != 0xfd &&
+ Boot->Media != 0xfe &&
+ Boot->Media != 0xff)
{
- *RecognizedFS = FALSE;
+ DPRINT1("Media %02x\n", Boot->Media);
+ *RecognizedFS = FALSE;
}
- if (pFatInfo && *RecognizedFS)
+ if (*RecognizedFS &&
+ Boot->SectorsPerCluster != 1 &&
+ Boot->SectorsPerCluster != 2 &&
+ Boot->SectorsPerCluster != 4 &&
+ Boot->SectorsPerCluster != 8 &&
+ Boot->SectorsPerCluster != 16 &&
+ Boot->SectorsPerCluster != 32 &&
+ Boot->SectorsPerCluster != 64 &&
+ Boot->SectorsPerCluster != 128)
{
- *pFatInfo = FatInfo;
+ DPRINT1("SectorsPerCluster %02x\n", Boot->SectorsPerCluster);
+ *RecognizedFS = FALSE;
}
- }
- }
-
- ExFreePool(Boot);
- }
-
- if (!*RecognizedFS && PartitionInfoIsValid)
- {
- BootFatX = ExAllocatePoolWithTag(NonPagedPool, sizeof(struct _BootSectorFatX), TAG_VFAT);
- if (BootFatX == NULL)
- {
- *RecognizedFS=FALSE;
- return STATUS_INSUFFICIENT_RESOURCES;
- }
-
- Offset.QuadPart = 0;
-
- /* Try to recognize FATX16/FATX32 partitions (Xbox) */
- Status = VfatReadDisk(DeviceToMount, &Offset, sizeof(struct _BootSectorFatX), (PUCHAR) BootFatX, FALSE);
- if (NT_SUCCESS(Status))
- {
- *RecognizedFS = TRUE;
- if (BootFatX->SysType[0] != 'F' ||
- BootFatX->SysType[1] != 'A' ||
- BootFatX->SysType[2] != 'T' ||
- BootFatX->SysType[3] != 'X')
- {
- DPRINT1("SysType %c%c%c%c\n", BootFatX->SysType[0], BootFatX->SysType[1], BootFatX->SysType[2], BootFatX->SysType[3]);
- *RecognizedFS=FALSE;
- }
-
- if (*RecognizedFS &&
- BootFatX->SectorsPerCluster != 1 &&
- BootFatX->SectorsPerCluster != 2 &&
- BootFatX->SectorsPerCluster != 4 &&
- BootFatX->SectorsPerCluster != 8 &&
- BootFatX->SectorsPerCluster != 16 &&
- BootFatX->SectorsPerCluster != 32 &&
- BootFatX->SectorsPerCluster != 64 &&
- BootFatX->SectorsPerCluster != 128)
- {
- DPRINT1("SectorsPerCluster %lu\n", BootFatX->SectorsPerCluster);
+
+ if (*RecognizedFS &&
+ Boot->BytesPerSector * Boot->SectorsPerCluster > 32 * 1024)
+ {
+ DPRINT1("ClusterSize %dx\n", Boot->BytesPerSector * Boot->SectorsPerCluster);
+ *RecognizedFS = FALSE;
+ }
+
+ if (*RecognizedFS)
+ {
+ FatInfo.VolumeID = Boot->VolumeID;
+ FatInfo.FATStart = Boot->ReservedSectors;
+ FatInfo.FATCount = Boot->FATCount;
+ FatInfo.FATSectors = Boot->FATSectors ? Boot->FATSectors : ((struct _BootSector32*) Boot)->FATSectors32;
+ FatInfo.BytesPerSector = Boot->BytesPerSector;
+ FatInfo.SectorsPerCluster = Boot->SectorsPerCluster;
+ FatInfo.BytesPerCluster = FatInfo.BytesPerSector * FatInfo.SectorsPerCluster;
+ FatInfo.rootDirectorySectors = ((Boot->RootEntries * 32) + Boot->BytesPerSector - 1) / Boot->BytesPerSector;
+ FatInfo.rootStart = FatInfo.FATStart + FatInfo.FATCount * FatInfo.FATSectors;
+ FatInfo.dataStart = FatInfo.rootStart + FatInfo.rootDirectorySectors;
+ FatInfo.Sectors = Sectors = Boot->Sectors ? Boot->Sectors : Boot->SectorsHuge;
+ Sectors -= Boot->ReservedSectors + FatInfo.FATCount * FatInfo.FATSectors + FatInfo.rootDirectorySectors;
+ FatInfo.NumberOfClusters = Sectors / Boot->SectorsPerCluster;
+ if (FatInfo.NumberOfClusters < 4085)
+ {
+ DPRINT("FAT12\n");
+ FatInfo.FatType = FAT12;
+ FatInfo.RootCluster = (FatInfo.rootStart - 1) / FatInfo.SectorsPerCluster;
+ RtlCopyMemory(&FatInfo.VolumeLabel, &Boot->VolumeLabel, sizeof(FatInfo.VolumeLabel));
+ }
+ else if (FatInfo.NumberOfClusters >= 65525)
+ {
+ DPRINT("FAT32\n");
+ FatInfo.FatType = FAT32;
+ FatInfo.RootCluster = ((struct _BootSector32*) Boot)->RootCluster;
+ FatInfo.rootStart = FatInfo.dataStart + ((FatInfo.RootCluster - 2) * FatInfo.SectorsPerCluster);
+ FatInfo.VolumeID = ((struct _BootSector32*) Boot)->VolumeID;
+ FatInfo.FSInfoSector = ((struct _BootSector32*) Boot)->FSInfoSector;
+ RtlCopyMemory(&FatInfo.VolumeLabel, &((struct _BootSector32*)Boot)->VolumeLabel, sizeof(FatInfo.VolumeLabel));
+ }
+ else
+ {
+ DPRINT("FAT16\n");
+ FatInfo.FatType = FAT16;
+ FatInfo.RootCluster = FatInfo.rootStart / FatInfo.SectorsPerCluster;
+ RtlCopyMemory(&FatInfo.VolumeLabel, &Boot->VolumeLabel, sizeof(FatInfo.VolumeLabel));
+ }
+
+ if (PartitionInfoIsValid &&
+ FatInfo.Sectors > PartitionInfo.PartitionLength.QuadPart / FatInfo.BytesPerSector)
+ {
+ *RecognizedFS = FALSE;
+ }
+
+ if (pFatInfo && *RecognizedFS)
+ {
+ *pFatInfo = FatInfo;
+ }
+ }
+ }
+
+ ExFreePool(Boot);
+ }
+
+ if (!*RecognizedFS && PartitionInfoIsValid)
+ {
+ BootFatX = ExAllocatePoolWithTag(NonPagedPool, sizeof(struct _BootSectorFatX), TAG_VFAT);
+ if (BootFatX == NULL)
+ {
*RecognizedFS=FALSE;
- }
-
- if (*RecognizedFS)
- {
- FatInfo.BytesPerSector = DiskGeometry.BytesPerSector;
- FatInfo.SectorsPerCluster = BootFatX->SectorsPerCluster;
- FatInfo.rootDirectorySectors = BootFatX->SectorsPerCluster;
- FatInfo.BytesPerCluster = BootFatX->SectorsPerCluster * DiskGeometry.BytesPerSector;
- FatInfo.Sectors = (ULONG)(PartitionInfo.PartitionLength.QuadPart / DiskGeometry.BytesPerSector);
- if (FatInfo.Sectors / FatInfo.SectorsPerCluster < 65525)
+ return STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ Offset.QuadPart = 0;
+
+ /* Try to recognize FATX16/FATX32 partitions (Xbox) */
+ Status = VfatReadDisk(DeviceToMount, &Offset, sizeof(struct _BootSectorFatX), (PUCHAR) BootFatX, Override);
+ if (NT_SUCCESS(Status))
+ {
+ *RecognizedFS = TRUE;
+ if (BootFatX->SysType[0] != 'F' ||
+ BootFatX->SysType[1] != 'A' ||
+ BootFatX->SysType[2] != 'T' ||
+ BootFatX->SysType[3] != 'X')
{
- DPRINT("FATX16\n");
- FatInfo.FatType = FATX16;
+ DPRINT1("SysType %c%c%c%c\n", BootFatX->SysType[0], BootFatX->SysType[1], BootFatX->SysType[2], BootFatX->SysType[3]);
+ *RecognizedFS=FALSE;
}
- else
+
+ if (*RecognizedFS &&
+ BootFatX->SectorsPerCluster != 1 &&
+ BootFatX->SectorsPerCluster != 2 &&
+ BootFatX->SectorsPerCluster != 4 &&
+ BootFatX->SectorsPerCluster != 8 &&
+ BootFatX->SectorsPerCluster != 16 &&
+ BootFatX->SectorsPerCluster != 32 &&
+ BootFatX->SectorsPerCluster != 64 &&
+ BootFatX->SectorsPerCluster != 128)
{
- DPRINT("FATX32\n");
- FatInfo.FatType = FATX32;
+ DPRINT1("SectorsPerCluster %lu\n", BootFatX->SectorsPerCluster);
+ *RecognizedFS=FALSE;
}
- FatInfo.VolumeID = BootFatX->VolumeID;
- FatInfo.FATStart = sizeof(struct _BootSectorFatX) / DiskGeometry.BytesPerSector;
- FatInfo.FATCount = BootFatX->FATCount;
- FatInfo.FATSectors =
- ROUND_UP(FatInfo.Sectors / FatInfo.SectorsPerCluster * (FatInfo.FatType == FATX16 ? 2 : 4), 4096) /
- FatInfo.BytesPerSector;
- FatInfo.rootStart = FatInfo.FATStart + FatInfo.FATCount * FatInfo.FATSectors;
- FatInfo.RootCluster = (FatInfo.rootStart - 1) / FatInfo.SectorsPerCluster;
- FatInfo.dataStart = FatInfo.rootStart + FatInfo.rootDirectorySectors;
- FatInfo.NumberOfClusters = (FatInfo.Sectors - FatInfo.dataStart) / FatInfo.SectorsPerCluster;
-
- if (pFatInfo && *RecognizedFS)
+
+ if (*RecognizedFS)
{
- *pFatInfo = FatInfo;
+ FatInfo.BytesPerSector = DiskGeometry.BytesPerSector;
+ FatInfo.SectorsPerCluster = BootFatX->SectorsPerCluster;
+ FatInfo.rootDirectorySectors = BootFatX->SectorsPerCluster;
+ FatInfo.BytesPerCluster = BootFatX->SectorsPerCluster * DiskGeometry.BytesPerSector;
+ FatInfo.Sectors = (ULONG)(PartitionInfo.PartitionLength.QuadPart / DiskGeometry.BytesPerSector);
+ if (FatInfo.Sectors / FatInfo.SectorsPerCluster < 65525)
+ {
+ DPRINT("FATX16\n");
+ FatInfo.FatType = FATX16;
+ }
+ else
+ {
+ DPRINT("FATX32\n");
+ FatInfo.FatType = FATX32;
+ }
+ FatInfo.VolumeID = BootFatX->VolumeID;
+ FatInfo.FATStart = sizeof(struct _BootSectorFatX) / DiskGeometry.BytesPerSector;
+ FatInfo.FATCount = BootFatX->FATCount;
+ FatInfo.FATSectors =
+ ROUND_UP(FatInfo.Sectors / FatInfo.SectorsPerCluster * (FatInfo.FatType == FATX16 ? 2 : 4), 4096) /
+ FatInfo.BytesPerSector;
+ FatInfo.rootStart = FatInfo.FATStart + FatInfo.FATCount * FatInfo.FATSectors;
+ FatInfo.RootCluster = (FatInfo.rootStart - 1) / FatInfo.SectorsPerCluster;
+ FatInfo.dataStart = FatInfo.rootStart + FatInfo.rootDirectorySectors;
+ FatInfo.NumberOfClusters = (FatInfo.Sectors - FatInfo.dataStart) / FatInfo.SectorsPerCluster;
+
+ if (pFatInfo && *RecognizedFS)
+ {
+ *pFatInfo = FatInfo;
+ }
}
- }
- }
- ExFreePool(BootFatX);
- }
+ }
+ ExFreePool(BootFatX);
+ }
- DPRINT("VfatHasFileSystem done\n");
- return Status;
+ DPRINT("VfatHasFileSystem done\n");
+ return Status;
}
-static NTSTATUS
-VfatMountDevice(PDEVICE_EXTENSION DeviceExt,
- PDEVICE_OBJECT DeviceToMount)
/*
- * FUNCTION: Mounts the device
+ * FUNCTION: Read the volume label
+ * WARNING: Read this comment carefully before using it (and using it wrong)
+ * Device parameter is expected to be the lower DO is start isn't 0
+ * otherwise, it is expected to be the VCB is start is 0
+ * Start parameter is expected to be, in bytes, the beginning of the root start.
+ * Set it to 0 if you wish to use the associated FCB with caching.
+ * In that specific case, Device parameter is expected to be the VCB!
+ * VolumeLabel parameter is expected to be a preallocated UNICODE_STRING (ie, with buffer)
+ * Its buffer has to be able to contain MAXIMUM_VOLUME_LABEL_LENGTH bytes
*/
+static
+NTSTATUS
+ReadVolumeLabel(
+ PVOID Device,
+ ULONG Start,
+ BOOLEAN IsFatX,
+ PUNICODE_STRING VolumeLabel)
{
- NTSTATUS Status;
- BOOLEAN RecognizedFS;
+ PDEVICE_EXTENSION DeviceExt;
+ PDEVICE_OBJECT DeviceObject;
+ PVOID Context = NULL;
+ ULONG DirIndex = 0;
+ PDIR_ENTRY Entry;
+ PVFATFCB pFcb;
+ LARGE_INTEGER FileOffset;
+ ULONG SizeDirEntry;
+ ULONG EntriesPerPage;
+ OEM_STRING StringO;
+ BOOLEAN NoCache = (Start != 0);
+ PVOID Buffer;
+ NTSTATUS Status = STATUS_SUCCESS;
+
+ if (IsFatX)
+ {
+ SizeDirEntry = sizeof(FATX_DIR_ENTRY);
+ EntriesPerPage = FATX_ENTRIES_PER_PAGE;
+ }
+ else
+ {
+ SizeDirEntry = sizeof(FAT_DIR_ENTRY);
+ EntriesPerPage = FAT_ENTRIES_PER_PAGE;
+ }
- DPRINT("Mounting VFAT device...\n");
+ FileOffset.QuadPart = Start;
+ if (!NoCache)
+ {
+ DeviceExt = Device;
+
+ /* FIXME: Check we really have a VCB
+ ASSERT();
+ */
+
+ ExAcquireResourceExclusiveLite(&DeviceExt->DirResource, TRUE);
+ pFcb = vfatOpenRootFCB(DeviceExt);
+ ExReleaseResourceLite(&DeviceExt->DirResource);
- Status = VfatHasFileSystem(DeviceToMount, &RecognizedFS, &DeviceExt->FatInfo);
- if (!NT_SUCCESS(Status))
- {
- return(Status);
- }
- DPRINT("MountVfatdev %d, PAGE_SIZE = %d\n", DeviceExt->FatInfo.BytesPerCluster, PAGE_SIZE);
+ _SEH2_TRY
+ {
+ CcMapData(pFcb->FileObject, &FileOffset, SizeDirEntry, MAP_WAIT, &Context, (PVOID*)&Entry);
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
+ Status = _SEH2_GetExceptionCode();
+ }
+ _SEH2_END;
+ }
+ else
+ {
+ DeviceObject = Device;
+
+ ASSERT(DeviceObject->Type == 3);
+
+ Buffer = ExAllocatePoolWithTag(NonPagedPool, PAGE_SIZE, TAG_VFAT);
+ if (Buffer != NULL)
+ {
+ Status = VfatReadDisk(DeviceObject, &FileOffset, PAGE_SIZE, (PUCHAR)Buffer, TRUE);
+ if (!NT_SUCCESS(Status))
+ {
+ ExFreePoolWithTag(Buffer, TAG_VFAT);
+ }
+ else
+ {
+ Entry = Buffer;
+ }
+ }
+ else
+ {
+ Status = STATUS_INSUFFICIENT_RESOURCES;
+ }
+ }
+
+ if (NT_SUCCESS(Status))
+ {
+ while (TRUE)
+ {
+ if (ENTRY_VOLUME(IsFatX, Entry))
+ {
+ /* copy volume label */
+ if (IsFatX)
+ {
+ StringO.Buffer = (PCHAR)Entry->FatX.Filename;
+ StringO.MaximumLength = StringO.Length = Entry->FatX.FilenameLength;
+ RtlOemStringToUnicodeString(VolumeLabel, &StringO, FALSE);
+ }
+ else
+ {
+ vfat8Dot3ToString(&Entry->Fat, VolumeLabel);
+ }
+ break;
+ }
+ if (ENTRY_END(IsFatX, Entry))
+ {
+ break;
+ }
+ DirIndex++;
+ Entry = (PDIR_ENTRY)((ULONG_PTR)Entry + SizeDirEntry);
+ if ((DirIndex % EntriesPerPage) == 0)
+ {
+ FileOffset.u.LowPart += PAGE_SIZE;
+
+ if (!NoCache)
+ {
+ CcUnpinData(Context);
+
+ _SEH2_TRY
+ {
+ CcMapData(pFcb->FileObject, &FileOffset, SizeDirEntry, MAP_WAIT, &Context, (PVOID*)&Entry);
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
+ Status = _SEH2_GetExceptionCode();
+ }
+ _SEH2_END;
+ if (!NT_SUCCESS(Status))
+ {
+ Context = NULL;
+ break;
+ }
+ }
+ else
+ {
+ Status = VfatReadDisk(DeviceObject, &FileOffset, PAGE_SIZE, (PUCHAR)Buffer, TRUE);
+ if (!NT_SUCCESS(Status))
+ {
+ break;
+ }
+ Entry = Buffer;
+ }
+ }
+ }
+ if (Context)
+ {
+ CcUnpinData(Context);
+ }
+ else if (NoCache)
+ {
+ ExFreePoolWithTag(Buffer, TAG_VFAT);
+ }
+ }
+ if (!NoCache)
+ {
+ ExAcquireResourceExclusiveLite(&DeviceExt->DirResource, TRUE);
+ vfatReleaseFCB(DeviceExt, pFcb);
+ ExReleaseResourceLite(&DeviceExt->DirResource);
+ }
- return(STATUS_SUCCESS);
+ return STATUS_SUCCESS;
}
-static NTSTATUS
-VfatMount (PVFAT_IRP_CONTEXT IrpContext)
/*
* FUNCTION: Mount the filesystem
*/
+static
+NTSTATUS
+VfatMount(
+ PVFAT_IRP_CONTEXT IrpContext)
{
- PDEVICE_OBJECT DeviceObject = NULL;
- PDEVICE_EXTENSION DeviceExt = NULL;
- BOOLEAN RecognizedFS;
- NTSTATUS Status;
- PVFATFCB Fcb = NULL;
- PVFATFCB VolumeFcb = NULL;
- PVFATCCB Ccb = NULL;
- PDEVICE_OBJECT DeviceToMount;
- PVPB Vpb;
- UNICODE_STRING NameU = RTL_CONSTANT_STRING(L"\\$$Fat$$");
- UNICODE_STRING VolumeNameU = RTL_CONSTANT_STRING(L"\\$$Volume$$");
- ULONG HashTableSize;
- ULONG eocMark;
- FATINFO FatInfo;
-
- DPRINT("VfatMount(IrpContext %p)\n", IrpContext);
-
- ASSERT(IrpContext);
-
- if (IrpContext->DeviceObject != VfatGlobalData->DeviceObject)
- {
- Status = STATUS_INVALID_DEVICE_REQUEST;
- goto ByeBye;
- }
-
- DeviceToMount = IrpContext->Stack->Parameters.MountVolume.DeviceObject;
- Vpb = IrpContext->Stack->Parameters.MountVolume.Vpb;
-
- Status = VfatHasFileSystem (DeviceToMount, &RecognizedFS, &FatInfo);
- if (!NT_SUCCESS(Status))
- {
- goto ByeBye;
- }
-
- if (RecognizedFS == FALSE)
- {
- DPRINT("VFAT: Unrecognized Volume\n");
- Status = STATUS_UNRECOGNIZED_VOLUME;
- goto ByeBye;
- }
-
- /* Use prime numbers for the table size */
- if (FatInfo.FatType == FAT12)
- {
- HashTableSize = 4099; // 4096 = 4 * 1024
- }
- else if (FatInfo.FatType == FAT16 ||
- FatInfo.FatType == FATX16)
- {
- HashTableSize = 16411; // 16384 = 16 * 1024
- }
- else
- {
- HashTableSize = 65537; // 65536 = 64 * 1024;
- }
- HashTableSize = FCB_HASH_TABLE_SIZE;
- DPRINT("VFAT: Recognized volume\n");
- Status = IoCreateDevice(VfatGlobalData->DriverObject,
- ROUND_UP(sizeof (DEVICE_EXTENSION), sizeof(ULONG)) + sizeof(HASHENTRY*) * HashTableSize,
- NULL,
- FILE_DEVICE_DISK_FILE_SYSTEM,
- DeviceToMount->Characteristics,
- FALSE,
- &DeviceObject);
- if (!NT_SUCCESS(Status))
- {
- goto ByeBye;
- }
-
- DeviceObject->Flags = DeviceObject->Flags | DO_DIRECT_IO;
- DeviceExt = (PVOID) DeviceObject->DeviceExtension;
- RtlZeroMemory(DeviceExt, ROUND_UP(sizeof(DEVICE_EXTENSION), sizeof(ULONG)) + sizeof(HASHENTRY*) * HashTableSize);
- DeviceExt->FcbHashTable = (HASHENTRY**)((ULONG_PTR)DeviceExt + ROUND_UP(sizeof(DEVICE_EXTENSION), sizeof(ULONG)));
- DeviceExt->HashTableSize = HashTableSize;
-
- /* use same vpb as device disk */
- DeviceObject->Vpb = Vpb;
- DeviceToMount->Vpb = Vpb;
-
- Status = VfatMountDevice(DeviceExt, DeviceToMount);
- if (!NT_SUCCESS(Status))
- {
- /* FIXME: delete device object */
- goto ByeBye;
- }
-
- DPRINT("BytesPerSector: %d\n", DeviceExt->FatInfo.BytesPerSector);
- DPRINT("SectorsPerCluster: %d\n", DeviceExt->FatInfo.SectorsPerCluster);
- DPRINT("FATCount: %d\n", DeviceExt->FatInfo.FATCount);
- DPRINT("FATSectors: %d\n", DeviceExt->FatInfo.FATSectors);
- DPRINT("RootStart: %d\n", DeviceExt->FatInfo.rootStart);
- DPRINT("DataStart: %d\n", DeviceExt->FatInfo.dataStart);
- if (DeviceExt->FatInfo.FatType == FAT32)
- {
- DPRINT("RootCluster: %d\n", DeviceExt->FatInfo.RootCluster);
- }
-
- switch (DeviceExt->FatInfo.FatType)
- {
- case FAT12:
- DeviceExt->GetNextCluster = FAT12GetNextCluster;
- DeviceExt->FindAndMarkAvailableCluster = FAT12FindAndMarkAvailableCluster;
- DeviceExt->WriteCluster = FAT12WriteCluster;
- DeviceExt->CleanShutBitMask = 0;
- break;
-
- case FAT16:
- case FATX16:
- DeviceExt->GetNextCluster = FAT16GetNextCluster;
- DeviceExt->FindAndMarkAvailableCluster = FAT16FindAndMarkAvailableCluster;
- DeviceExt->WriteCluster = FAT16WriteCluster;
- DeviceExt->CleanShutBitMask = 0x8000;
- break;
-
- case FAT32:
- case FATX32:
- DeviceExt->GetNextCluster = FAT32GetNextCluster;
- DeviceExt->FindAndMarkAvailableCluster = FAT32FindAndMarkAvailableCluster;
- DeviceExt->WriteCluster = FAT32WriteCluster;
- DeviceExt->CleanShutBitMask = 0x80000000;
- break;
- }
-
- if (DeviceExt->FatInfo.FatType == FATX16
- || DeviceExt->FatInfo.FatType == FATX32)
- {
- DeviceExt->Flags |= VCB_IS_FATX;
- DeviceExt->GetNextDirEntry = FATXGetNextDirEntry;
- DeviceExt->BaseDateYear = 2000;
- }
- else
- {
- DeviceExt->GetNextDirEntry = FATGetNextDirEntry;
- DeviceExt->BaseDateYear = 1980;
- }
-
- DeviceExt->StorageDevice = DeviceToMount;
- DeviceExt->StorageDevice->Vpb->DeviceObject = DeviceObject;
- DeviceExt->StorageDevice->Vpb->RealDevice = DeviceExt->StorageDevice;
- DeviceExt->StorageDevice->Vpb->Flags |= VPB_MOUNTED;
- DeviceObject->StackSize = DeviceExt->StorageDevice->StackSize + 1;
- DeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
-
- DPRINT("FsDeviceObject %p\n", DeviceObject);
-
- /* Initialize this resource early ... it's used in VfatCleanup */
- ExInitializeResourceLite(&DeviceExt->DirResource);
-
- DeviceExt->FATFileObject = IoCreateStreamFileObject(NULL, DeviceExt->StorageDevice);
- Fcb = vfatNewFCB(DeviceExt, &NameU);
- if (Fcb == NULL)
- {
- Status = STATUS_INSUFFICIENT_RESOURCES;
- goto ByeBye;
- }
- Ccb = ExAllocateFromNPagedLookasideList(&VfatGlobalData->CcbLookasideList);
- if (Ccb == NULL)
- {
- Status = STATUS_INSUFFICIENT_RESOURCES;
- goto ByeBye;
- }
-
- RtlZeroMemory(Ccb, sizeof (VFATCCB));
- DeviceExt->FATFileObject->FsContext = Fcb;
- DeviceExt->FATFileObject->FsContext2 = Ccb;
- DeviceExt->FATFileObject->SectionObjectPointer = &Fcb->SectionObjectPointers;
- DeviceExt->FATFileObject->PrivateCacheMap = NULL;
- DeviceExt->FATFileObject->Vpb = DeviceObject->Vpb;
- Fcb->FileObject = DeviceExt->FATFileObject;
-
- Fcb->Flags |= FCB_IS_FAT;
-
- Fcb->RFCB.FileSize.QuadPart = DeviceExt->FatInfo.FATSectors * DeviceExt->FatInfo.BytesPerSector;
- Fcb->RFCB.ValidDataLength = Fcb->RFCB.FileSize;
- Fcb->RFCB.AllocationSize = Fcb->RFCB.FileSize;
-
- CcInitializeCacheMap(DeviceExt->FATFileObject,
- (PCC_FILE_SIZES)(&Fcb->RFCB.AllocationSize),
- TRUE,
- &VfatGlobalData->CacheMgrCallbacks,
- Fcb);
-
- DeviceExt->LastAvailableCluster = 2;
- ExInitializeResourceLite(&DeviceExt->FatResource);
-
- InitializeListHead(&DeviceExt->FcbListHead);
-
- VolumeFcb = vfatNewFCB(DeviceExt, &VolumeNameU);
- if (VolumeFcb == NULL)
- {
- Status = STATUS_INSUFFICIENT_RESOURCES;
- goto ByeBye;
- }
- VolumeFcb->Flags = FCB_IS_VOLUME;
- VolumeFcb->RFCB.FileSize.QuadPart = DeviceExt->FatInfo.Sectors * DeviceExt->FatInfo.BytesPerSector;
- VolumeFcb->RFCB.ValidDataLength = VolumeFcb->RFCB.FileSize;
- VolumeFcb->RFCB.AllocationSize = VolumeFcb->RFCB.FileSize;
- DeviceExt->VolumeFcb = VolumeFcb;
-
- ExAcquireResourceExclusiveLite(&VfatGlobalData->VolumeListLock, TRUE);
- InsertHeadList(&VfatGlobalData->VolumeListHead, &DeviceExt->VolumeListEntry);
- ExReleaseResourceLite(&VfatGlobalData->VolumeListLock);
-
- /* read serial number */
- DeviceObject->Vpb->SerialNumber = DeviceExt->FatInfo.VolumeID;
-
- /* read volume label */
- ReadVolumeLabel(DeviceExt, DeviceObject->Vpb);
-
- /* read clean shutdown bit status */
- Status = GetNextCluster(DeviceExt, 1, &eocMark);
- if (NT_SUCCESS(Status))
- {
- if (eocMark & DeviceExt->CleanShutBitMask)
- {
- /* unset clean shutdown bit */
- eocMark &= ~DeviceExt->CleanShutBitMask;
- WriteCluster(DeviceExt, 1, eocMark);
- VolumeFcb->Flags |= VCB_CLEAR_DIRTY;
- }
- }
- VolumeFcb->Flags |= VCB_IS_DIRTY;
-
- FsRtlNotifyVolumeEvent(DeviceExt->FATFileObject, FSRTL_VOLUME_MOUNT);
-
- Status = STATUS_SUCCESS;
+ PDEVICE_OBJECT DeviceObject = NULL;
+ PDEVICE_EXTENSION DeviceExt = NULL;
+ BOOLEAN RecognizedFS;
+ NTSTATUS Status;
+ PVFATFCB Fcb = NULL;
+ PVFATFCB VolumeFcb = NULL;
+ PVFATCCB Ccb = NULL;
+ PDEVICE_OBJECT DeviceToMount;
+ PVPB Vpb;
+ UNICODE_STRING NameU = RTL_CONSTANT_STRING(L"\\$$Fat$$");
+ UNICODE_STRING VolumeNameU = RTL_CONSTANT_STRING(L"\\$$Volume$$");
+ UNICODE_STRING VolumeLabelU;
+ ULONG HashTableSize;
+ ULONG i;
+ FATINFO FatInfo;
+ BOOLEAN Dirty;
+
+ DPRINT("VfatMount(IrpContext %p)\n", IrpContext);
+
+ ASSERT(IrpContext);
+
+ if (IrpContext->DeviceObject != VfatGlobalData->DeviceObject)
+ {
+ Status = STATUS_INVALID_DEVICE_REQUEST;
+ goto ByeBye;
+ }
+
+ DeviceToMount = IrpContext->Stack->Parameters.MountVolume.DeviceObject;
+ Vpb = IrpContext->Stack->Parameters.MountVolume.Vpb;
+
+ Status = VfatHasFileSystem(DeviceToMount, &RecognizedFS, &FatInfo, FALSE);
+ if (!NT_SUCCESS(Status))
+ {
+ goto ByeBye;
+ }
+
+ if (RecognizedFS == FALSE)
+ {
+ DPRINT("VFAT: Unrecognized Volume\n");
+ Status = STATUS_UNRECOGNIZED_VOLUME;
+ goto ByeBye;
+ }
+
+ /* Use prime numbers for the table size */
+ if (FatInfo.FatType == FAT12)
+ {
+ HashTableSize = 4099; // 4096 = 4 * 1024
+ }
+ else if (FatInfo.FatType == FAT16 ||
+ FatInfo.FatType == FATX16)
+ {
+ HashTableSize = 16411; // 16384 = 16 * 1024
+ }
+ else
+ {
+ HashTableSize = 65537; // 65536 = 64 * 1024;
+ }
+ DPRINT("VFAT: Recognized volume\n");
+ Status = IoCreateDevice(VfatGlobalData->DriverObject,
+ ROUND_UP(sizeof (DEVICE_EXTENSION), sizeof(ULONG)) + sizeof(HASHENTRY*) * HashTableSize,
+ NULL,
+ FILE_DEVICE_DISK_FILE_SYSTEM,
+ DeviceToMount->Characteristics,
+ FALSE,
+ &DeviceObject);
+ if (!NT_SUCCESS(Status))
+ {
+ goto ByeBye;
+ }
+
+ DeviceExt = DeviceObject->DeviceExtension;
+ RtlZeroMemory(DeviceExt, ROUND_UP(sizeof(DEVICE_EXTENSION), sizeof(ULONG)) + sizeof(HASHENTRY*) * HashTableSize);
+ DeviceExt->FcbHashTable = (HASHENTRY**)((ULONG_PTR)DeviceExt + ROUND_UP(sizeof(DEVICE_EXTENSION), sizeof(ULONG)));
+ DeviceExt->HashTableSize = HashTableSize;
+ DeviceExt->VolumeDevice = DeviceObject;
+
+ /* use same vpb as device disk */
+ DeviceObject->Vpb = Vpb;
+ DeviceToMount->Vpb = Vpb;
+
+ RtlCopyMemory(&DeviceExt->FatInfo, &FatInfo, sizeof(FATINFO));
+
+ DPRINT("BytesPerSector: %u\n", DeviceExt->FatInfo.BytesPerSector);
+ DPRINT("SectorsPerCluster: %u\n", DeviceExt->FatInfo.SectorsPerCluster);
+ DPRINT("FATCount: %u\n", DeviceExt->FatInfo.FATCount);
+ DPRINT("FATSectors: %u\n", DeviceExt->FatInfo.FATSectors);
+ DPRINT("RootStart: %u\n", DeviceExt->FatInfo.rootStart);
+ DPRINT("DataStart: %u\n", DeviceExt->FatInfo.dataStart);
+ if (DeviceExt->FatInfo.FatType == FAT32)
+ {
+ DPRINT("RootCluster: %u\n", DeviceExt->FatInfo.RootCluster);
+ }
+
+ switch (DeviceExt->FatInfo.FatType)
+ {
+ case FAT12:
+ DeviceExt->GetNextCluster = FAT12GetNextCluster;
+ DeviceExt->FindAndMarkAvailableCluster = FAT12FindAndMarkAvailableCluster;
+ DeviceExt->WriteCluster = FAT12WriteCluster;
+ /* We don't define dirty bit functions here
+ * FAT12 doesn't have such bit and they won't get called
+ */
+ break;
+
+ case FAT16:
+ case FATX16:
+ DeviceExt->GetNextCluster = FAT16GetNextCluster;
+ DeviceExt->FindAndMarkAvailableCluster = FAT16FindAndMarkAvailableCluster;
+ DeviceExt->WriteCluster = FAT16WriteCluster;
+ DeviceExt->GetDirtyStatus = FAT16GetDirtyStatus;
+ DeviceExt->SetDirtyStatus = FAT16SetDirtyStatus;
+ break;
+
+ case FAT32:
+ case FATX32:
+ DeviceExt->GetNextCluster = FAT32GetNextCluster;
+ DeviceExt->FindAndMarkAvailableCluster = FAT32FindAndMarkAvailableCluster;
+ DeviceExt->WriteCluster = FAT32WriteCluster;
+ DeviceExt->GetDirtyStatus = FAT32GetDirtyStatus;
+ DeviceExt->SetDirtyStatus = FAT32SetDirtyStatus;
+ break;
+ }
+
+ if (DeviceExt->FatInfo.FatType == FATX16 ||
+ DeviceExt->FatInfo.FatType == FATX32)
+ {
+ DeviceExt->Flags |= VCB_IS_FATX;
+ DeviceExt->BaseDateYear = 2000;
+ RtlCopyMemory(&DeviceExt->Dispatch, &FatXDispatch, sizeof(VFAT_DISPATCH));
+ }
+ else
+ {
+ DeviceExt->BaseDateYear = 1980;
+ RtlCopyMemory(&DeviceExt->Dispatch, &FatDispatch, sizeof(VFAT_DISPATCH));
+ }
+
+ DeviceExt->StorageDevice = DeviceToMount;
+ DeviceExt->StorageDevice->Vpb->DeviceObject = DeviceObject;
+ DeviceExt->StorageDevice->Vpb->RealDevice = DeviceExt->StorageDevice;
+ DeviceExt->StorageDevice->Vpb->Flags |= VPB_MOUNTED;
+ DeviceObject->StackSize = DeviceExt->StorageDevice->StackSize + 1;
+ DeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
+
+ DPRINT("FsDeviceObject %p\n", DeviceObject);
+
+ /* Initialize this resource early ... it's used in VfatCleanup */
+ ExInitializeResourceLite(&DeviceExt->DirResource);
+
+ DeviceExt->IoVPB = DeviceObject->Vpb;
+ DeviceExt->SpareVPB = ExAllocatePoolWithTag(NonPagedPool, sizeof(VPB), TAG_VFAT);
+ if (DeviceExt->SpareVPB == NULL)
+ {
+ Status = STATUS_INSUFFICIENT_RESOURCES;
+ goto ByeBye;
+ }
+
+ DeviceExt->Statistics = ExAllocatePoolWithTag(NonPagedPool,
+ sizeof(STATISTICS) * VfatGlobalData->NumberProcessors,
+ TAG_STATS);
+ if (DeviceExt->Statistics == NULL)
+ {
+ Status = STATUS_INSUFFICIENT_RESOURCES;
+ goto ByeBye;
+ }
+
+ RtlZeroMemory(DeviceExt->Statistics, sizeof(STATISTICS) * VfatGlobalData->NumberProcessors);
+ for (i = 0; i < VfatGlobalData->NumberProcessors; ++i)
+ {
+ DeviceExt->Statistics[i].Base.FileSystemType = FILESYSTEM_STATISTICS_TYPE_FAT;
+ DeviceExt->Statistics[i].Base.Version = 1;
+ DeviceExt->Statistics[i].Base.SizeOfCompleteStructure = sizeof(STATISTICS);
+ }
+
+ DeviceExt->FATFileObject = IoCreateStreamFileObject(NULL, DeviceExt->StorageDevice);
+ Fcb = vfatNewFCB(DeviceExt, &NameU);
+ if (Fcb == NULL)
+ {
+ Status = STATUS_INSUFFICIENT_RESOURCES;
+ goto ByeBye;
+ }
+
+ Ccb = ExAllocateFromNPagedLookasideList(&VfatGlobalData->CcbLookasideList);
+ if (Ccb == NULL)
+ {
+ Status = STATUS_INSUFFICIENT_RESOURCES;
+ goto ByeBye;
+ }
+
+ RtlZeroMemory(Ccb, sizeof (VFATCCB));
+ DeviceExt->FATFileObject->FsContext = Fcb;
+ DeviceExt->FATFileObject->FsContext2 = Ccb;
+ DeviceExt->FATFileObject->SectionObjectPointer = &Fcb->SectionObjectPointers;
+ DeviceExt->FATFileObject->PrivateCacheMap = NULL;
+ DeviceExt->FATFileObject->Vpb = DeviceObject->Vpb;
+ Fcb->FileObject = DeviceExt->FATFileObject;
+
+ Fcb->Flags |= FCB_IS_FAT;
+
+ Fcb->RFCB.FileSize.QuadPart = DeviceExt->FatInfo.FATSectors * DeviceExt->FatInfo.BytesPerSector;
+ Fcb->RFCB.ValidDataLength = Fcb->RFCB.FileSize;
+ Fcb->RFCB.AllocationSize = Fcb->RFCB.FileSize;
+
+ _SEH2_TRY
+ {
+ CcInitializeCacheMap(DeviceExt->FATFileObject,
+ (PCC_FILE_SIZES)(&Fcb->RFCB.AllocationSize),
+ TRUE,
+ &VfatGlobalData->CacheMgrCallbacks,
+ Fcb);
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
+ Status = _SEH2_GetExceptionCode();
+ goto ByeBye;
+ }
+ _SEH2_END;
+
+ DeviceExt->LastAvailableCluster = 2;
+ CountAvailableClusters(DeviceExt, NULL);
+ ExInitializeResourceLite(&DeviceExt->FatResource);
+
+ InitializeListHead(&DeviceExt->FcbListHead);
+
+ VolumeFcb = vfatNewFCB(DeviceExt, &VolumeNameU);
+ if (VolumeFcb == NULL)
+ {
+ Status = STATUS_INSUFFICIENT_RESOURCES;
+ goto ByeBye;
+ }
+
+ VolumeFcb->Flags = FCB_IS_VOLUME;
+ VolumeFcb->RFCB.FileSize.QuadPart = (LONGLONG) DeviceExt->FatInfo.Sectors * DeviceExt->FatInfo.BytesPerSector;
+ VolumeFcb->RFCB.ValidDataLength = VolumeFcb->RFCB.FileSize;
+ VolumeFcb->RFCB.AllocationSize = VolumeFcb->RFCB.FileSize;
+ DeviceExt->VolumeFcb = VolumeFcb;
+
+ ExAcquireResourceExclusiveLite(&VfatGlobalData->VolumeListLock, TRUE);
+ InsertHeadList(&VfatGlobalData->VolumeListHead, &DeviceExt->VolumeListEntry);
+ ExReleaseResourceLite(&VfatGlobalData->VolumeListLock);
+
+ /* read serial number */
+ DeviceObject->Vpb->SerialNumber = DeviceExt->FatInfo.VolumeID;
+
+ /* read volume label */
+ VolumeLabelU.Buffer = DeviceObject->Vpb->VolumeLabel;
+ VolumeLabelU.Length = 0;
+ VolumeLabelU.MaximumLength = sizeof(DeviceObject->Vpb->VolumeLabel);
+ ReadVolumeLabel(DeviceExt, 0, vfatVolumeIsFatX(DeviceExt), &VolumeLabelU);
+ Vpb->VolumeLabelLength = VolumeLabelU.Length;
+
+ /* read dirty bit status */
+ Status = GetDirtyStatus(DeviceExt, &Dirty);
+ if (NT_SUCCESS(Status))
+ {
+ /* The volume wasn't dirty, it was properly dismounted */
+ if (!Dirty)
+ {
+ /* Mark it dirty now! */
+ SetDirtyStatus(DeviceExt, TRUE);
+ VolumeFcb->Flags |= VCB_CLEAR_DIRTY;
+ }
+ else
+ {
+ DPRINT1("Mounting a dirty volume\n");
+ }
+ }
+
+ VolumeFcb->Flags |= VCB_IS_DIRTY;
+ if (BooleanFlagOn(Vpb->RealDevice->Flags, DO_SYSTEM_BOOT_PARTITION))
+ {
+ SetFlag(DeviceExt->Flags, VCB_IS_SYS_OR_HAS_PAGE);
+ }
+
+ FsRtlNotifyVolumeEvent(DeviceExt->FATFileObject, FSRTL_VOLUME_MOUNT);
+ FsRtlNotifyInitializeSync(&DeviceExt->NotifySync);
+ InitializeListHead(&DeviceExt->NotifyList);
+
+ DPRINT("Mount success\n");
+
+ Status = STATUS_SUCCESS;
+
ByeBye:
+ if (!NT_SUCCESS(Status))
+ {
+ /* Cleanup */
+ if (DeviceExt && DeviceExt->FATFileObject)
+ ObDereferenceObject (DeviceExt->FATFileObject);
+ if (DeviceExt && DeviceExt->SpareVPB)
+ ExFreePoolWithTag(DeviceExt->SpareVPB, TAG_VFAT);
+ if (DeviceExt && DeviceExt->Statistics)
+ ExFreePoolWithTag(DeviceExt->Statistics, TAG_STATS);
+ if (Fcb)
+ vfatDestroyFCB(Fcb);
+ if (Ccb)
+ vfatDestroyCCB(Ccb);
+ if (DeviceObject)
+ IoDeleteDevice(DeviceObject);
+ }
- if (!NT_SUCCESS(Status))
- {
- // cleanup
- if (DeviceExt && DeviceExt->FATFileObject)
- ObDereferenceObject (DeviceExt->FATFileObject);
- if (Fcb)
- vfatDestroyFCB(Fcb);
- if (Ccb)
- vfatDestroyCCB(Ccb);
- if (DeviceObject)
- IoDeleteDevice(DeviceObject);
- if (VolumeFcb)
- vfatDestroyFCB(VolumeFcb);
- }
- return Status;
+ return Status;
}
-static NTSTATUS
-VfatVerify (PVFAT_IRP_CONTEXT IrpContext)
/*
* FUNCTION: Verify the filesystem
*/
+static
+NTSTATUS
+VfatVerify(
+ PVFAT_IRP_CONTEXT IrpContext)
{
- PDEVICE_OBJECT DeviceToVerify;
- NTSTATUS Status = STATUS_SUCCESS;
- FATINFO FatInfo;
- BOOLEAN RecognizedFS;
- PDEVICE_EXTENSION DeviceExt = IrpContext->DeviceExt;
-
- DPRINT("VfatVerify(IrpContext %p)\n", IrpContext);
-
- DeviceToVerify = IrpContext->Stack->Parameters.VerifyVolume.DeviceObject;
- Status = VfatBlockDeviceIoControl(DeviceToVerify,
- IOCTL_DISK_CHECK_VERIFY,
- NULL,
- 0,
- NULL,
- 0,
- TRUE);
- DeviceToVerify->Flags &= ~DO_VERIFY_VOLUME;
- if (!NT_SUCCESS(Status) && Status != STATUS_VERIFY_REQUIRED)
- {
- DPRINT("VfatBlockDeviceIoControl() failed (Status %lx)\n", Status);
- Status = STATUS_WRONG_VOLUME;
- }
- else
- {
- Status = VfatHasFileSystem(DeviceToVerify, &RecognizedFS, &FatInfo);
- if (!NT_SUCCESS(Status) || RecognizedFS == FALSE)
+ PDEVICE_OBJECT DeviceToVerify;
+ NTSTATUS Status;
+ FATINFO FatInfo;
+ BOOLEAN RecognizedFS;
+ PDEVICE_EXTENSION DeviceExt;
+ BOOLEAN AllowRaw;
+ PVPB Vpb;
+ ULONG ChangeCount, BufSize = sizeof(ChangeCount);
+
+ DPRINT("VfatVerify(IrpContext %p)\n", IrpContext);
+
+ DeviceToVerify = IrpContext->Stack->Parameters.VerifyVolume.DeviceObject;
+ DeviceExt = DeviceToVerify->DeviceExtension;
+ Vpb = IrpContext->Stack->Parameters.VerifyVolume.Vpb;
+ AllowRaw = BooleanFlagOn(IrpContext->Stack->Flags, SL_ALLOW_RAW_MOUNT);
+
+ if (!BooleanFlagOn(Vpb->RealDevice->Flags, DO_VERIFY_VOLUME))
+ {
+ DPRINT("Already verified\n");
+ return STATUS_SUCCESS;
+ }
+
+ Status = VfatBlockDeviceIoControl(DeviceExt->StorageDevice,
+ IOCTL_DISK_CHECK_VERIFY,
+ NULL,
+ 0,
+ &ChangeCount,
+ &BufSize,
+ TRUE);
+ if (!NT_SUCCESS(Status) && Status != STATUS_VERIFY_REQUIRED)
+ {
+ DPRINT("VfatBlockDeviceIoControl() failed (Status %lx)\n", Status);
+ Status = (AllowRaw ? STATUS_WRONG_VOLUME : Status);
+ }
+ else
+ {
+ Status = VfatHasFileSystem(DeviceExt->StorageDevice, &RecognizedFS, &FatInfo, TRUE);
+ if (!NT_SUCCESS(Status) || RecognizedFS == FALSE)
{
- Status = STATUS_WRONG_VOLUME;
+ if (NT_SUCCESS(Status) || AllowRaw)
+ {
+ Status = STATUS_WRONG_VOLUME;
+ }
}
- else if (sizeof(FATINFO) == RtlCompareMemory(&FatInfo, &DeviceExt->FatInfo, sizeof(FATINFO)))
+ else if (sizeof(FATINFO) == RtlCompareMemory(&FatInfo, &DeviceExt->FatInfo, sizeof(FATINFO)))
{
- /*
- * FIXME:
- * Preformated floppy disks have very often a serial number of 0000:0000.
- * We should calculate a crc sum over the sectors from the root directory as secondary volume number.
- * Each write to the root directory must update this crc sum.
- */
-
+ WCHAR BufferU[MAXIMUM_VOLUME_LABEL_LENGTH / sizeof(WCHAR)];
+ UNICODE_STRING VolumeLabelU;
+ UNICODE_STRING VpbLabelU;
+
+ VolumeLabelU.Buffer = BufferU;
+ VolumeLabelU.Length = 0;
+ VolumeLabelU.MaximumLength = sizeof(BufferU);
+ Status = ReadVolumeLabel(DeviceExt->StorageDevice, FatInfo.rootStart * FatInfo.BytesPerSector, (FatInfo.FatType >= FATX16), &VolumeLabelU);
+ if (!NT_SUCCESS(Status))
+ {
+ if (AllowRaw)
+ {
+ Status = STATUS_WRONG_VOLUME;
+ }
+ }
+ else
+ {
+ VpbLabelU.Buffer = Vpb->VolumeLabel;
+ VpbLabelU.Length = Vpb->VolumeLabelLength;
+ VpbLabelU.MaximumLength = sizeof(Vpb->VolumeLabel);
+
+ if (RtlCompareUnicodeString(&VpbLabelU, &VolumeLabelU, FALSE) != 0)
+ {
+ Status = STATUS_WRONG_VOLUME;
+ }
+ else
+ {
+ DPRINT1("Same volume\n");
+ }
+ }
}
- else
+ else
{
- Status = STATUS_WRONG_VOLUME;
+ Status = STATUS_WRONG_VOLUME;
}
- }
+ }
+
+ Vpb->RealDevice->Flags &= ~DO_VERIFY_VOLUME;
- return Status;
+ return Status;
}
-static NTSTATUS
-VfatGetVolumeBitmap(PVFAT_IRP_CONTEXT IrpContext)
+static
+NTSTATUS
+VfatGetVolumeBitmap(
+ PVFAT_IRP_CONTEXT IrpContext)
{
- DPRINT("VfatGetVolumeBitmap (IrpContext %p)\n", IrpContext);
-
- return STATUS_INVALID_DEVICE_REQUEST;
+ DPRINT("VfatGetVolumeBitmap (IrpContext %p)\n", IrpContext);
+ return STATUS_INVALID_DEVICE_REQUEST;
}
-static NTSTATUS
-VfatGetRetrievalPointers(PVFAT_IRP_CONTEXT IrpContext)
+static
+NTSTATUS
+VfatGetRetrievalPointers(
+ PVFAT_IRP_CONTEXT IrpContext)
{
- PIO_STACK_LOCATION Stack;
- LARGE_INTEGER Vcn;
- PRETRIEVAL_POINTERS_BUFFER RetrievalPointers;
- PFILE_OBJECT FileObject;
- ULONG MaxExtentCount;
- PVFATFCB Fcb;
- PDEVICE_EXTENSION DeviceExt;
- ULONG FirstCluster;
- ULONG CurrentCluster;
- ULONG LastCluster;
- NTSTATUS Status;
-
- DPRINT("VfatGetRetrievalPointers(IrpContext %p)\n", IrpContext);
-
- DeviceExt = IrpContext->DeviceExt;
- FileObject = IrpContext->FileObject;
- Stack = IrpContext->Stack;
- if (Stack->Parameters.DeviceIoControl.InputBufferLength < sizeof(STARTING_VCN_INPUT_BUFFER) ||
- Stack->Parameters.DeviceIoControl.Type3InputBuffer == NULL)
- {
- return STATUS_INVALID_PARAMETER;
- }
- if (IrpContext->Irp->UserBuffer == NULL ||
- Stack->Parameters.DeviceIoControl.OutputBufferLength < sizeof(RETRIEVAL_POINTERS_BUFFER))
- {
- return STATUS_BUFFER_TOO_SMALL;
- }
-
- Fcb = FileObject->FsContext;
-
- ExAcquireResourceSharedLite(&Fcb->MainResource, TRUE);
-
- Vcn = ((PSTARTING_VCN_INPUT_BUFFER)Stack->Parameters.DeviceIoControl.Type3InputBuffer)->StartingVcn;
- RetrievalPointers = IrpContext->Irp->UserBuffer;
-
- MaxExtentCount = ((Stack->Parameters.DeviceIoControl.OutputBufferLength - sizeof(RetrievalPointers->ExtentCount) - sizeof(RetrievalPointers->StartingVcn)) / sizeof(RetrievalPointers->Extents[0]));
-
-
- if (Vcn.QuadPart >= Fcb->RFCB.AllocationSize.QuadPart / DeviceExt->FatInfo.BytesPerCluster)
- {
- Status = STATUS_INVALID_PARAMETER;
- goto ByeBye;
- }
-
- CurrentCluster = FirstCluster = vfatDirEntryGetFirstCluster(DeviceExt, &Fcb->entry);
- Status = OffsetToCluster(DeviceExt, FirstCluster,
- Vcn.u.LowPart * DeviceExt->FatInfo.BytesPerCluster,
- &CurrentCluster, FALSE);
- if (!NT_SUCCESS(Status))
- {
- goto ByeBye;
- }
-
- RetrievalPointers->StartingVcn = Vcn;
- RetrievalPointers->ExtentCount = 0;
- RetrievalPointers->Extents[0].Lcn.u.HighPart = 0;
- RetrievalPointers->Extents[0].Lcn.u.LowPart = CurrentCluster - 2;
- LastCluster = 0;
- while (CurrentCluster != 0xffffffff && RetrievalPointers->ExtentCount < MaxExtentCount)
- {
-
- LastCluster = CurrentCluster;
- Status = NextCluster(DeviceExt, CurrentCluster, &CurrentCluster, FALSE);
- Vcn.QuadPart++;
- if (!NT_SUCCESS(Status))
- {
- goto ByeBye;
- }
-
- if (LastCluster + 1 != CurrentCluster)
- {
- RetrievalPointers->Extents[RetrievalPointers->ExtentCount].NextVcn = Vcn;
- RetrievalPointers->ExtentCount++;
- if (RetrievalPointers->ExtentCount < MaxExtentCount)
- {
- RetrievalPointers->Extents[RetrievalPointers->ExtentCount].Lcn.u.HighPart = 0;
- RetrievalPointers->Extents[RetrievalPointers->ExtentCount].Lcn.u.LowPart = CurrentCluster - 2;
- }
- }
- }
-
- IrpContext->Irp->IoStatus.Information = sizeof(RETRIEVAL_POINTERS_BUFFER) + (sizeof(RetrievalPointers->Extents[0]) * (RetrievalPointers->ExtentCount - 1));
- Status = STATUS_SUCCESS;
+ PIO_STACK_LOCATION Stack;
+ LARGE_INTEGER Vcn;
+ PRETRIEVAL_POINTERS_BUFFER RetrievalPointers;
+ PFILE_OBJECT FileObject;
+ ULONG MaxExtentCount;
+ PVFATFCB Fcb;
+ PDEVICE_EXTENSION DeviceExt;
+ ULONG FirstCluster;
+ ULONG CurrentCluster;
+ ULONG LastCluster;
+ NTSTATUS Status;
+
+ DPRINT("VfatGetRetrievalPointers(IrpContext %p)\n", IrpContext);
+
+ DeviceExt = IrpContext->DeviceExt;
+ FileObject = IrpContext->FileObject;
+ Stack = IrpContext->Stack;
+ if (Stack->Parameters.DeviceIoControl.InputBufferLength < sizeof(STARTING_VCN_INPUT_BUFFER) ||
+ Stack->Parameters.DeviceIoControl.Type3InputBuffer == NULL)
+ {
+ return STATUS_INVALID_PARAMETER;
+ }
+
+ if (IrpContext->Irp->UserBuffer == NULL ||
+ Stack->Parameters.DeviceIoControl.OutputBufferLength < sizeof(RETRIEVAL_POINTERS_BUFFER))
+ {
+ return STATUS_BUFFER_TOO_SMALL;
+ }
+
+ Fcb = FileObject->FsContext;
+
+ ExAcquireResourceSharedLite(&Fcb->MainResource, TRUE);
+
+ Vcn = ((PSTARTING_VCN_INPUT_BUFFER)Stack->Parameters.DeviceIoControl.Type3InputBuffer)->StartingVcn;
+ RetrievalPointers = IrpContext->Irp->UserBuffer;
+
+ MaxExtentCount = ((Stack->Parameters.DeviceIoControl.OutputBufferLength - sizeof(RetrievalPointers->ExtentCount) - sizeof(RetrievalPointers->StartingVcn)) / sizeof(RetrievalPointers->Extents[0]));
+
+ if (Vcn.QuadPart >= Fcb->RFCB.AllocationSize.QuadPart / DeviceExt->FatInfo.BytesPerCluster)
+ {
+ Status = STATUS_INVALID_PARAMETER;
+ goto ByeBye;
+ }
+
+ CurrentCluster = FirstCluster = vfatDirEntryGetFirstCluster(DeviceExt, &Fcb->entry);
+ Status = OffsetToCluster(DeviceExt, FirstCluster,
+ Vcn.u.LowPart * DeviceExt->FatInfo.BytesPerCluster,
+ &CurrentCluster, FALSE);
+ if (!NT_SUCCESS(Status))
+ {
+ goto ByeBye;
+ }
+
+ RetrievalPointers->StartingVcn = Vcn;
+ RetrievalPointers->ExtentCount = 0;
+ RetrievalPointers->Extents[0].Lcn.u.HighPart = 0;
+ RetrievalPointers->Extents[0].Lcn.u.LowPart = CurrentCluster - 2;
+ LastCluster = 0;
+ while (CurrentCluster != 0xffffffff && RetrievalPointers->ExtentCount < MaxExtentCount)
+ {
+ LastCluster = CurrentCluster;
+ Status = NextCluster(DeviceExt, CurrentCluster, &CurrentCluster, FALSE);
+ Vcn.QuadPart++;
+ if (!NT_SUCCESS(Status))
+ {
+ goto ByeBye;
+ }
+
+ if (LastCluster + 1 != CurrentCluster)
+ {
+ RetrievalPointers->Extents[RetrievalPointers->ExtentCount].NextVcn = Vcn;
+ RetrievalPointers->ExtentCount++;
+ if (RetrievalPointers->ExtentCount < MaxExtentCount)
+ {
+ RetrievalPointers->Extents[RetrievalPointers->ExtentCount].Lcn.u.HighPart = 0;
+ RetrievalPointers->Extents[RetrievalPointers->ExtentCount].Lcn.u.LowPart = CurrentCluster - 2;
+ }
+ }
+ }
+
+ IrpContext->Irp->IoStatus.Information = sizeof(RETRIEVAL_POINTERS_BUFFER) + (sizeof(RetrievalPointers->Extents[0]) * (RetrievalPointers->ExtentCount - 1));
+ Status = STATUS_SUCCESS;
ByeBye:
- ExReleaseResourceLite(&Fcb->MainResource);
+ ExReleaseResourceLite(&Fcb->MainResource);
- return Status;
+ return Status;
+}
+
+static
+NTSTATUS
+VfatMoveFile(
+ PVFAT_IRP_CONTEXT IrpContext)
+{
+ DPRINT("VfatMoveFile(IrpContext %p)\n", IrpContext);
+ return STATUS_INVALID_DEVICE_REQUEST;
}
-static NTSTATUS
-VfatMoveFile(PVFAT_IRP_CONTEXT IrpContext)
+static
+NTSTATUS
+VfatIsVolumeDirty(
+ PVFAT_IRP_CONTEXT IrpContext)
{
- DPRINT("VfatMoveFile(IrpContext %p)\n", IrpContext);
+ PULONG Flags;
+
+ DPRINT("VfatIsVolumeDirty(IrpContext %p)\n", IrpContext);
+
+ if (IrpContext->Stack->Parameters.FileSystemControl.OutputBufferLength != sizeof(ULONG))
+ return STATUS_INVALID_BUFFER_SIZE;
+ else if (!IrpContext->Irp->AssociatedIrp.SystemBuffer)
+ return STATUS_INVALID_USER_BUFFER;
+
+ Flags = (PULONG)IrpContext->Irp->AssociatedIrp.SystemBuffer;
+ *Flags = 0;
+
+ if (BooleanFlagOn(IrpContext->DeviceExt->VolumeFcb->Flags, VCB_IS_DIRTY) &&
+ !BooleanFlagOn(IrpContext->DeviceExt->VolumeFcb->Flags, VCB_CLEAR_DIRTY))
+ {
+ *Flags |= VOLUME_IS_DIRTY;
+ }
+
+ IrpContext->Irp->IoStatus.Information = sizeof(ULONG);
+
+ return STATUS_SUCCESS;
+}
+
+static
+NTSTATUS
+VfatMarkVolumeDirty(
+ PVFAT_IRP_CONTEXT IrpContext)
+{
+ PDEVICE_EXTENSION DeviceExt;
+ NTSTATUS Status = STATUS_SUCCESS;
+
+ DPRINT("VfatMarkVolumeDirty(IrpContext %p)\n", IrpContext);
+ DeviceExt = IrpContext->DeviceExt;
+
+ if (!BooleanFlagOn(DeviceExt->VolumeFcb->Flags, VCB_IS_DIRTY))
+ {
+ Status = SetDirtyStatus(DeviceExt, TRUE);
+ }
+
+ DeviceExt->VolumeFcb->Flags &= ~VCB_CLEAR_DIRTY;
+
+ return Status;
+}
+
+static
+NTSTATUS
+VfatLockOrUnlockVolume(
+ PVFAT_IRP_CONTEXT IrpContext,
+ BOOLEAN Lock)
+{
+ PFILE_OBJECT FileObject;
+ PDEVICE_EXTENSION DeviceExt;
+ PVFATFCB Fcb;
+ PVPB Vpb;
+
+ DPRINT("VfatLockOrUnlockVolume(%p, %d)\n", IrpContext, Lock);
+
+ DeviceExt = IrpContext->DeviceExt;
+ FileObject = IrpContext->FileObject;
+ Fcb = FileObject->FsContext;
+ Vpb = DeviceExt->FATFileObject->Vpb;
+
+ /* Only allow locking with the volume open */
+ if (!BooleanFlagOn(Fcb->Flags, FCB_IS_VOLUME))
+ {
+ return STATUS_ACCESS_DENIED;
+ }
+
+ /* Bail out if it's already in the demanded state */
+ if ((BooleanFlagOn(DeviceExt->Flags, VCB_VOLUME_LOCKED) && Lock) ||
+ (!BooleanFlagOn(DeviceExt->Flags, VCB_VOLUME_LOCKED) && !Lock))
+ {
+ return STATUS_ACCESS_DENIED;
+ }
+
+ /* Bail out if it's already in the demanded state */
+ if ((BooleanFlagOn(Vpb->Flags, VPB_LOCKED) && Lock) ||
+ (!BooleanFlagOn(Vpb->Flags, VPB_LOCKED) && !Lock))
+ {
+ return STATUS_ACCESS_DENIED;
+ }
+
+ /* Deny locking if we're not alone */
+ if (Lock && DeviceExt->OpenHandleCount != 1)
+ {
+ PLIST_ENTRY ListEntry;
+
+#if 1
+ /* FIXME: Hack that allows locking the system volume on
+ * boot so that autochk can run properly
+ * That hack is, on purpose, really restrictive
+ * it will only allow locking with two directories
+ * open: current directory of smss and autochk.
+ */
+ BOOLEAN ForceLock = TRUE;
+ ULONG HandleCount = 0;
+
+ /* Only allow boot volume */
+ if (BooleanFlagOn(DeviceExt->Flags, VCB_IS_SYS_OR_HAS_PAGE))
+ {
+ /* We'll browse all the FCB */
+ ListEntry = DeviceExt->FcbListHead.Flink;
+ while (ListEntry != &DeviceExt->FcbListHead)
+ {
+ Fcb = CONTAINING_RECORD(ListEntry, VFATFCB, FcbListEntry);
+ ListEntry = ListEntry->Flink;
+
+ /* If no handle: that FCB is no problem for locking
+ * so ignore it
+ */
+ if (Fcb->OpenHandleCount == 0)
+ {
+ continue;
+ }
+
+ /* Not a dir? We're no longer at boot */
+ if (!vfatFCBIsDirectory(Fcb))
+ {
+ ForceLock = FALSE;
+ break;
+ }
+
+ /* If we have cached initialized and several handles, we're
+ not in the boot case
+ */
+ if (Fcb->FileObject != NULL && Fcb->OpenHandleCount > 1)
+ {
+ ForceLock = FALSE;
+ break;
+ }
+
+ /* Count the handles */
+ HandleCount += Fcb->OpenHandleCount;
+ /* More than two handles? Then, we're not booting anymore */
+ if (HandleCount > 2)
+ {
+ ForceLock = FALSE;
+ break;
+ }
+ }
+ }
+ else
+ {
+ ForceLock = FALSE;
+ }
+
+ /* Here comes the hack, ignore the failure! */
+ if (!ForceLock)
+ {
+#endif
+
+ DPRINT1("Can't lock: %u opened\n", DeviceExt->OpenHandleCount);
+
+ ListEntry = DeviceExt->FcbListHead.Flink;
+ while (ListEntry != &DeviceExt->FcbListHead)
+ {
+ Fcb = CONTAINING_RECORD(ListEntry, VFATFCB, FcbListEntry);
+ ListEntry = ListEntry->Flink;
+
+ if (Fcb->OpenHandleCount > 0)
+ {
+ DPRINT1("Opened (%u - %u): %wZ\n", Fcb->OpenHandleCount, Fcb->RefCount, &Fcb->PathNameU);
+ }
+ }
+
+ return STATUS_ACCESS_DENIED;
+
+#if 1
+ /* End of the hack: be verbose about its usage,
+ * just in case we would mess up everything!
+ */
+ }
+ else
+ {
+ DPRINT1("HACK: Using lock-hack!\n");
+ }
+#endif
+ }
- return STATUS_INVALID_DEVICE_REQUEST;
+ /* Finally, proceed */
+ if (Lock)
+ {
+ DeviceExt->Flags |= VCB_VOLUME_LOCKED;
+ Vpb->Flags |= VPB_LOCKED;
+ }
+ else
+ {
+ DeviceExt->Flags &= ~VCB_VOLUME_LOCKED;
+ Vpb->Flags &= ~VPB_LOCKED;
+ }
+
+ return STATUS_SUCCESS;
}
-static NTSTATUS
-VfatIsVolumeDirty(PVFAT_IRP_CONTEXT IrpContext)
+static
+NTSTATUS
+VfatDismountVolume(
+ PVFAT_IRP_CONTEXT IrpContext)
{
- PULONG Flags;
+ PDEVICE_EXTENSION DeviceExt;
+ PLIST_ENTRY NextEntry;
+ PVFATFCB Fcb;
+ PFILE_OBJECT FileObject;
+
+ DPRINT("VfatDismountVolume(%p)\n", IrpContext);
- DPRINT("VfatIsVolumeDirty(IrpContext %p)\n", IrpContext);
+ DeviceExt = IrpContext->DeviceExt;
+ FileObject = IrpContext->FileObject;
- if (IrpContext->Stack->Parameters.FileSystemControl.OutputBufferLength != sizeof(ULONG))
- return STATUS_INVALID_BUFFER_SIZE;
- else if (!IrpContext->Irp->AssociatedIrp.SystemBuffer)
- return STATUS_INVALID_USER_BUFFER;
+ /* We HAVE to be locked. Windows also allows dismount with no lock
+ * but we're here mainly for 1st stage, so KISS
+ */
+ if (!BooleanFlagOn(DeviceExt->Flags, VCB_VOLUME_LOCKED))
+ {
+ return STATUS_ACCESS_DENIED;
+ }
- Flags = (PULONG)IrpContext->Irp->AssociatedIrp.SystemBuffer;
- *Flags = 0;
+ /* Deny dismount of boot volume */
+ if (BooleanFlagOn(DeviceExt->Flags, VCB_IS_SYS_OR_HAS_PAGE))
+ {
+ return STATUS_ACCESS_DENIED;
+ }
+
+ /* Race condition? */
+ if (BooleanFlagOn(DeviceExt->Flags, VCB_DISMOUNT_PENDING))
+ {
+ return STATUS_VOLUME_DISMOUNTED;
+ }
+
+ /* Notify we'll dismount. Pass that point there's no reason we fail */
+ FsRtlNotifyVolumeEvent(IrpContext->Stack->FileObject, FSRTL_VOLUME_DISMOUNT);
+
+ ExAcquireResourceExclusiveLite(&DeviceExt->FatResource, TRUE);
+
+ /* We're performing a clean shutdown */
+ if (BooleanFlagOn(DeviceExt->VolumeFcb->Flags, VCB_CLEAR_DIRTY))
+ {
+ /* Drop the dirty bit */
+ if (NT_SUCCESS(SetDirtyStatus(DeviceExt, FALSE)))
+ DeviceExt->VolumeFcb->Flags &= ~VCB_IS_DIRTY;
+ }
- if (IrpContext->DeviceExt->VolumeFcb->Flags & VCB_IS_DIRTY
- && !(IrpContext->DeviceExt->VolumeFcb->Flags & VCB_CLEAR_DIRTY))
- {
- *Flags |= VOLUME_IS_DIRTY;
- }
+ /* Flush volume & files */
+ VfatFlushVolume(DeviceExt, (PVFATFCB)FileObject->FsContext);
- return STATUS_SUCCESS;
+ /* Rebrowse the FCB in order to free them now */
+ while (!IsListEmpty(&DeviceExt->FcbListHead))
+ {
+ NextEntry = RemoveTailList(&DeviceExt->FcbListHead);
+ Fcb = CONTAINING_RECORD(NextEntry, VFATFCB, FcbListEntry);
+ vfatDestroyFCB(Fcb);
+ }
+
+ /* Mark we're being dismounted */
+ DeviceExt->Flags |= VCB_DISMOUNT_PENDING;
+#ifndef ENABLE_SWAPOUT
+ IrpContext->DeviceObject->Vpb->Flags &= ~VPB_MOUNTED;
+#endif
+
+ ExReleaseResourceLite(&DeviceExt->FatResource);
+
+ /* Release a few resources and quit, we're done */
+ ExFreePoolWithTag(DeviceExt->Statistics, TAG_STATS);
+ ExDeleteResourceLite(&DeviceExt->DirResource);
+ ExDeleteResourceLite(&DeviceExt->FatResource);
+ ObDereferenceObject(DeviceExt->FATFileObject);
+
+ return STATUS_SUCCESS;
}
-static NTSTATUS
-VfatMarkVolumeDirty(PVFAT_IRP_CONTEXT IrpContext)
+static
+NTSTATUS
+VfatGetStatistics(
+ PVFAT_IRP_CONTEXT IrpContext)
{
- ULONG eocMark;
- PDEVICE_EXTENSION DeviceExt;
- NTSTATUS Status = STATUS_SUCCESS;
-
- DPRINT("VfatMarkVolumeDirty(IrpContext %p)\n", IrpContext);
- DeviceExt = IrpContext->DeviceExt;
-
- if (!(DeviceExt->VolumeFcb->Flags & VCB_IS_DIRTY))
- {
- Status = GetNextCluster(DeviceExt, 1, &eocMark);
- if (NT_SUCCESS(Status))
- {
- /* unset clean shutdown bit */
- eocMark &= ~DeviceExt->CleanShutBitMask;
- Status = WriteCluster(DeviceExt, 1, eocMark);
- }
- }
-
- DeviceExt->VolumeFcb->Flags &= ~VCB_CLEAR_DIRTY;
-
- return Status;
+ PVOID Buffer;
+ ULONG Length;
+ NTSTATUS Status;
+ PDEVICE_EXTENSION DeviceExt;
+
+ DeviceExt = IrpContext->DeviceExt;
+ Length = IrpContext->Stack->Parameters.FileSystemControl.OutputBufferLength;
+ Buffer = IrpContext->Irp->AssociatedIrp.SystemBuffer;
+
+ if (Length < sizeof(FILESYSTEM_STATISTICS))
+ {
+ return STATUS_BUFFER_TOO_SMALL;
+ }
+
+ if (Buffer == NULL)
+ {
+ return STATUS_INVALID_USER_BUFFER;
+ }
+
+ if (Length >= sizeof(STATISTICS) * VfatGlobalData->NumberProcessors)
+ {
+ Length = sizeof(STATISTICS) * VfatGlobalData->NumberProcessors;
+ Status = STATUS_SUCCESS;
+ }
+ else
+ {
+ Status = STATUS_BUFFER_OVERFLOW;
+ }
+
+ RtlCopyMemory(Buffer, DeviceExt->Statistics, Length);
+ IrpContext->Irp->IoStatus.Information = Length;
+
+ return Status;
}
-NTSTATUS VfatFileSystemControl(PVFAT_IRP_CONTEXT IrpContext)
/*
* FUNCTION: File system control
*/
+NTSTATUS
+VfatFileSystemControl(
+ PVFAT_IRP_CONTEXT IrpContext)
{
+ NTSTATUS Status;
+
+ DPRINT("VfatFileSystemControl(IrpContext %p)\n", IrpContext);
+
+ ASSERT(IrpContext);
+ ASSERT(IrpContext->Irp);
+ ASSERT(IrpContext->Stack);
+
+ IrpContext->Irp->IoStatus.Information = 0;
+
+ switch (IrpContext->MinorFunction)
+ {
+ case IRP_MN_KERNEL_CALL:
+ case IRP_MN_USER_FS_REQUEST:
+ switch(IrpContext->Stack->Parameters.DeviceIoControl.IoControlCode)
+ {
+ case FSCTL_GET_VOLUME_BITMAP:
+ Status = VfatGetVolumeBitmap(IrpContext);
+ break;
+
+ case FSCTL_GET_RETRIEVAL_POINTERS:
+ Status = VfatGetRetrievalPointers(IrpContext);
+ break;
+
+ case FSCTL_MOVE_FILE:
+ Status = VfatMoveFile(IrpContext);
+ break;
+
+ case FSCTL_IS_VOLUME_DIRTY:
+ Status = VfatIsVolumeDirty(IrpContext);
+ break;
+
+ case FSCTL_MARK_VOLUME_DIRTY:
+ Status = VfatMarkVolumeDirty(IrpContext);
+ break;
+
+ case FSCTL_LOCK_VOLUME:
+ Status = VfatLockOrUnlockVolume(IrpContext, TRUE);
+ break;
+
+ case FSCTL_UNLOCK_VOLUME:
+ Status = VfatLockOrUnlockVolume(IrpContext, FALSE);
+ break;
+
+ case FSCTL_DISMOUNT_VOLUME:
+ Status = VfatDismountVolume(IrpContext);
+ break;
+
+ case FSCTL_FILESYSTEM_GET_STATISTICS:
+ Status = VfatGetStatistics(IrpContext);
+ break;
+
+ default:
+ Status = STATUS_INVALID_DEVICE_REQUEST;
+ }
+ break;
+
+ case IRP_MN_MOUNT_VOLUME:
+ Status = VfatMount(IrpContext);
+ break;
+
+ case IRP_MN_VERIFY_VOLUME:
+ DPRINT("VFATFS: IRP_MN_VERIFY_VOLUME\n");
+ Status = VfatVerify(IrpContext);
+ break;
+
+ default:
+ DPRINT("VFAT FSC: MinorFunction %u\n", IrpContext->MinorFunction);
+ Status = STATUS_INVALID_DEVICE_REQUEST;
+ break;
+ }
- NTSTATUS Status;
-
- DPRINT("VfatFileSystemControl(IrpContext %p)\n", IrpContext);
-
- ASSERT(IrpContext);
- ASSERT(IrpContext->Irp);
- ASSERT(IrpContext->Stack);
-
- IrpContext->Irp->IoStatus.Information = 0;
-
- switch (IrpContext->MinorFunction)
- {
- case IRP_MN_KERNEL_CALL:
- case IRP_MN_USER_FS_REQUEST:
- switch(IrpContext->Stack->Parameters.DeviceIoControl.IoControlCode)
- {
- case FSCTL_GET_VOLUME_BITMAP:
- Status = VfatGetVolumeBitmap(IrpContext);
- break;
- case FSCTL_GET_RETRIEVAL_POINTERS:
- Status = VfatGetRetrievalPointers(IrpContext);
- break;
- case FSCTL_MOVE_FILE:
- Status = VfatMoveFile(IrpContext);
- break;
- case FSCTL_IS_VOLUME_DIRTY:
- Status = VfatIsVolumeDirty(IrpContext);
- break;
- case FSCTL_MARK_VOLUME_DIRTY:
- Status = VfatMarkVolumeDirty(IrpContext);
- break;
- default:
- Status = STATUS_INVALID_DEVICE_REQUEST;
- }
- break;
-
- case IRP_MN_MOUNT_VOLUME:
- Status = VfatMount(IrpContext);
- break;
-
- case IRP_MN_VERIFY_VOLUME:
- DPRINT("VFATFS: IRP_MN_VERIFY_VOLUME\n");
- Status = VfatVerify(IrpContext);
- break;
-
- default:
- DPRINT("VFAT FSC: MinorFunction %d\n", IrpContext->MinorFunction);
- Status = STATUS_INVALID_DEVICE_REQUEST;
- break;
- }
-
- IrpContext->Irp->IoStatus.Status = Status;
-
- IoCompleteRequest (IrpContext->Irp, IO_NO_INCREMENT);
- VfatFreeIrpContext(IrpContext);
- return (Status);
+ return Status;
}
projects / reactos.git / blobdiff