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a few more changes to vfat driver

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svn path=/trunk/; revision=1901
This commit is contained in:
Rex Jolliff 2001-05-10 06:30:23 +00:00
parent 9cfc87e333
commit 4c5a154f4d
1 changed files with 51 additions and 45 deletions
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96
reactos/drivers/fs/vfat/fcb.c
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@ -1,4 +1,4 @@
/* $Id: fcb.c,v 1.2 2001/05/10 04:02:21 rex Exp $
/* $Id: fcb.c,v 1.3 2001/05/10 06:30:23 rex Exp $
*
*
* FILE: fcb.c
@ -88,29 +88,34 @@ void vfatAddFCBToTable (PDEVICE_EXTENSION pVCB, PVFATFCB pFCB)
KeReleaseSpinLock (&pVCB->FcbListLock, oldIrql);
}
PVFATFCB vfatGrabFCBFromTable (PDEVICE_EXTENSION pDeviceExt, PWSTR pFileName)
PVFATFCB
vfatGrabFCBFromTable (PDEVICE_EXTENSION pVCB, PWSTR pFileName)
{
KIRQL oldIrql;
PVFATFCB rcFCB;
PLIST_ENTRY current_entry;
KeAcquireSpinLock (&pDeviceExt->FcbListLock, &oldIrql);
current_entry = pDeviceExt->FcbListHead.Flink;
while (current_entry != &pDeviceExt->FcbListHead)
CHECKPOINT;
KeAcquireSpinLock (&pVCB->FcbListLock, &oldIrql);
CHECKPOINT;
current_entry = pVCB->FcbListHead.Flink;
while (current_entry != &pVCB->FcbListHead)
{
rcFCB = CONTAINING_RECORD (current_entry, VFATFCB, FcbListEntry);
DPRINT ("Scanning %x(%S)\n", rcFCB, rcFCB->PathName);
DPRINT ("Next FCB in list at %x\n", rcFCB);
DPRINT (" PathName:%S\n", rcFCB->PathName);
if (wstrcmpi (pFileName, rcFCB->PathName))
{
rcFCB->RefCount++;
KeReleaseSpinLock (&pDeviceExt->FcbListLock, oldIrql);
KeReleaseSpinLock (&pVCB->FcbListLock, oldIrql);
return rcFCB;
}
current_entry = current_entry->Flink;
}
KeReleaseSpinLock (&pDeviceExt->FcbListLock, oldIrql);
CHECKPOINT;
KeReleaseSpinLock (&pVCB->FcbListLock, oldIrql);
return NULL;
}
@ -118,55 +123,56 @@ PVFATFCB vfatGrabFCBFromTable (PDEVICE_EXTENSION pDeviceExt, PWSTR pFileName)
PVFATFCB
vfatMakeRootFCB (PDEVICE_EXTENSION pVCB)
{
UNIMPLEMENTED;
NTSTATUS status;
PVFATFCB FCB;
PFILE_OBJECT fileObject;
ULONG bytesPerCluster;
ULONG fileCacheQuantum;
FCB = vfatNewFCB (L"\\");
memset (FCB->entry.Filename, ' ', 11);
FCB->entry.FileSize = pVCB->rootDirectorySectors * BLOCKSIZE;
FCB->entry.Attrib = FILE_ATTRIBUTE_DIRECTORY;
if (pVCB->FatType == FAT32)
{
FCB->entry.FirstCluster = 2;
}
else
{
FCB->entry.FirstCluster = 1;
}
FCB->RefCount = 1;
fileObject = IoCreateStreamFileObject (NULL, pVCB->StorageDevice);
bytesPerCluster = pVCB->Boot->SectorsPerCluster * BLOCKSIZE;
fileCacheQuantum = (bytesPerCluster >= PAGESIZE) ?
bytesPerCluster : PAGESIZE;
status = CcRosInitializeFileCache (fileObject,
&FCB->RFCB.Bcb,
fileCacheQuantum);
if (!NT_SUCCESS (status))
{
DbgPrint ("CcRosInitializeFileCache failed\n");
KeBugCheck (0);
}
ObDereferenceObject (fileObject);
vfatAddFCBToTable (pVCB, FCB);
return FCB;
}
PVFATFCB
vfatOpenRootFCB (PDEVICE_EXTENSION pVCB)
{
NTSTATUS status;
PVFATFCB FCB;
HANDLE fileHandle;
OBJECT_ATTRIBUTES objectAttributes;
IO_STATUS_BLOCK ioStatusBlock;
UNICODE_STRING rootPath;
FCB = vfatGrabFCBFromTable (pVCB, L"\\");
if (FCB != NULL)
{
return FCB;
}
RtlCreateUnicodeString (&rootPath, L"\\");
objectAttributes.Length = sizeof(OBJECT_ATTRIBUTES);
objectAttributes.RootDirectory = NULL;
objectAttributes.ObjectName = &rootPath;
objectAttributes.Attributes = OBJ_CASE_INSENSITIVE;
objectAttributes.SecurityDescriptor = NULL;
objectAttributes.SecurityQualityOfService = NULL;
status = IoCreateFile(&fileHandle,
FILE_DIRECTORY_FILE | FILE_RANDOM_ACCESS |
FILE_GENERIC_READ | FILE_GENERIC_WRITE,
&objectAttributes,
&ioStatusBlock,
NULL,
0,
0,
FILE_OPEN,
0,
NULL,
0,
0,
NULL,
0);
if (status != STATUS_SUCCESS)
{
return NULL;
}
FCB = vfatGrabFCBFromTable (pVCB, L"\\");
ZwClose (fileHandle);
FCB = vfatMakeRootFCB (pVCB);
return FCB;
}