mirror of
https://github.com/reactos/reactos.git
synced 2024-06-30 01:42:30 +00:00
extracted a few more FCB funcs
svn path=/trunk/; revision=1900
This commit is contained in:
Rex Jolliff
parent
3c986c6d3a
commit
9cfc87e333
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@ -1,4 +1,4 @@
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/* $Id: close.c,v 1.6 2001/05/04 01:21:45 rex Exp $
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/* $Id: close.c,v 1.7 2001/05/10 04:02:21 rex Exp $
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*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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@ -26,7 +26,6 @@ VfatCloseFile (PDEVICE_EXTENSION DeviceExt, PFILE_OBJECT FileObject)
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{
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PVFATFCB pFcb;
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PVFATCCB pCcb;
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KIRQL oldIrql;
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DPRINT ("VfatCloseFile(DeviceExt %x, FileObject %x)\n",
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DeviceExt, FileObject);
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@ -36,26 +35,15 @@ VfatCloseFile (PDEVICE_EXTENSION DeviceExt, PFILE_OBJECT FileObject)
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DPRINT ("pCcb %x\n", pCcb);
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if (pCcb == NULL)
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{
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return (STATUS_SUCCESS);
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}
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{
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return STATUS_SUCCESS;
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}
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pFcb = pCcb->pFcb;
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pFcb->RefCount--;
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CHECKPOINT;
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if (pFcb->RefCount <= 0)
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{
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CcRosReleaseFileCache(FileObject, pFcb->RFCB.Bcb);
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KeAcquireSpinLock (&DeviceExt->FcbListLock, &oldIrql);
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CHECKPOINT;
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RemoveEntryList (&pFcb->FcbListEntry);
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KeReleaseSpinLock (&DeviceExt->FcbListLock, oldIrql);
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ExFreePool (pFcb);
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CHECKPOINT;
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}
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vfatReleaseFCB (DeviceExt, pFcb);
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ExFreePool (pCcb);
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return STATUS_SUCCESS;
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return STATUS_SUCCESS;
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}
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NTSTATUS STDCALL
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@ -1,4 +1,4 @@
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/* $Id: fcb.c,v 1.1 2001/05/02 03:18:03 rex Exp $
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/* $Id: fcb.c,v 1.2 2001/05/10 04:02:21 rex Exp $
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*
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*
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* FILE: fcb.c
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@ -49,7 +49,12 @@ PVFATFCB vfatNewFCB (PWCHAR pFileName)
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return rcFCB;
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}
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void vfatGrabFCB (PDEVICE_EXTENSION pVCB, PVFATFCB pFCB)
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void vfatDestroyFCB (PVFATFCB pFCB)
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{
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ExFreePool (pFCB);
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}
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void vfatGrabFCB (PDEVICE_EXTENSION pVCB, PVFATFCB pFCB)
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{
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KIRQL oldIrql;
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@ -64,10 +69,11 @@ void vfatReleaseFCB (PDEVICE_EXTENSION pVCB, PVFATFCB pFCB)
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KeAcquireSpinLock (&pVCB->FcbListLock, &oldIrql);
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pFCB->RefCount--;
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if (pFCB->RefCount <= 0)
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if (pFCB->RefCount <= 0 && !vfatFCBIsDirectory (pVCB, pFCB))
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{
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RemoveEntryList (&pFCB->FcbListEntry);
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ExFreePool (pFCB);
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CcRosReleaseFileCache (NULL, pFCB->RFCB.Bcb);
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vfatDestroyFCB (pFCB);
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}
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KeReleaseSpinLock (&pVCB->FcbListLock, oldIrql);
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}
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@ -108,3 +114,174 @@ PVFATFCB vfatGrabFCBFromTable (PDEVICE_EXTENSION pDeviceExt, PWSTR pFileName)
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return NULL;
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}
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PVFATFCB
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vfatMakeRootFCB (PDEVICE_EXTENSION pVCB)
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{
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UNIMPLEMENTED;
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}
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PVFATFCB
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vfatOpenRootFCB (PDEVICE_EXTENSION pVCB)
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{
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NTSTATUS status;
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PVFATFCB FCB;
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HANDLE fileHandle;
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OBJECT_ATTRIBUTES objectAttributes;
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IO_STATUS_BLOCK ioStatusBlock;
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UNICODE_STRING rootPath;
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FCB = vfatGrabFCBFromTable (pVCB, L"\\");
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if (FCB != NULL)
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{
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return FCB;
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}
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RtlCreateUnicodeString (&rootPath, L"\\");
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objectAttributes.Length = sizeof(OBJECT_ATTRIBUTES);
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objectAttributes.RootDirectory = NULL;
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objectAttributes.ObjectName = &rootPath;
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objectAttributes.Attributes = OBJ_CASE_INSENSITIVE;
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objectAttributes.SecurityDescriptor = NULL;
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objectAttributes.SecurityQualityOfService = NULL;
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status = IoCreateFile(&fileHandle,
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FILE_DIRECTORY_FILE | FILE_RANDOM_ACCESS |
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FILE_GENERIC_READ | FILE_GENERIC_WRITE,
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&objectAttributes,
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&ioStatusBlock,
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NULL,
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0,
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0,
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FILE_OPEN,
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0,
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NULL,
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0,
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0,
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NULL,
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0);
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if (status != STATUS_SUCCESS)
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{
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return NULL;
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}
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FCB = vfatGrabFCBFromTable (pVCB, L"\\");
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ZwClose (fileHandle);
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return FCB;
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}
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BOOL
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vfatFCBIsDirectory (PDEVICE_EXTENSION pVCB, PVFATFCB FCB)
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{
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return FCB->entry.Attrib & FILE_ATTRIBUTE_DIRECTORY;
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}
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PVFATFCB
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vfatDirFindFile (PDEVICE_EXTENSION pVCB,
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PVFATFCB parentFCB,
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const PWSTR elementName)
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{
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UNIMPLEMENTED;
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}
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NTSTATUS
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vfatGetFCBForFile (PDEVICE_EXTENSION pVCB,
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PVFATFCB *pParentFCB,
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PVFATFCB *pFCB,
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const PWSTR pFileName)
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{
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WCHAR pathName [MAX_PATH];
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WCHAR elementName [MAX_PATH];
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PWCHAR currentElement;
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PVFATFCB FCB;
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PVFATFCB parentFCB;
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// Trivial case, open of the root directory on volume
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if (pFileName [0] == L'\0' || wcscmp (pFileName, L"\\") == 0)
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{
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currentElement = pFileName;
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//FIXME: grab/create root RCB and return it
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FCB = vfatGrabFCBFromTable (pVCB, L"\\");
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if (FCB == NULL)
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{
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FCB = vfatMakeRootFCB (pVCB);
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*pFCB = FCB;
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*pParentFCB = NULL;
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return (FCB != NULL) ? STATUS_SUCCESS : STATUS_OBJECT_PATH_NOT_FOUND;
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}
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}
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else
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{
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currentElement = pFileName + 1;
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wcscpy (pathName, L"\\");
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FCB = vfatOpenRootFCB (pVCB);
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}
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parentFCB = NULL;
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// Parse filename and check each path element for existance and access
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while (vfatGetNextPathElement (currentElement) != 0)
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{
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// Skip blank directory levels
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if ((vfatGetNextPathElement (currentElement) - currentElement) == 0)
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{
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currentElement++;
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continue;
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}
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currentElement = vfatGetNextPathElement (currentElement);
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// descend to next directory level
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if (parentFCB)
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{
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vfatReleaseFCB (pVCB, parentFCB);
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parentFCB = 0;
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}
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// fail if element in FCB is not a directory
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if (!vfatFCBIsDirectory (pVCB, FCB))
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{
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vfatReleaseFCB (pVCB, FCB);
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FCB = 0;
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return STATUS_OBJECT_PATH_NOT_FOUND;
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}
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parentFCB = FCB;
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// Extract next directory level into dirName
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vfatWSubString (pathName,
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pFileName,
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vfatGetNextPathElement (currentElement) - pFileName);
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FCB = vfatGrabFCBFromTable (pVCB, pathName);
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if (FCB == NULL)
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{
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vfatWSubString (elementName,
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currentElement,
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vfatGetNextPathElement (currentElement) - currentElement);
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FCB = vfatDirFindFile (pVCB, parentFCB, elementName);
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if (FCB == NULL)
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{
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*pParentFCB = parentFCB;
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*pFCB = NULL;
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if (vfatGetNextPathElement (currentElement) == 0)
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{
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return STATUS_OBJECT_NAME_NOT_FOUND;
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}
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else
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{
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return STATUS_OBJECT_PATH_NOT_FOUND;
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}
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}
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// FIXME: check security on directory element and fail if access denied
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}
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}
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*pParentFCB = parentFCB;
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*pFCB = FCB;
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return STATUS_SUCCESS;
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}
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@ -1,4 +1,4 @@
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/* $Id: string.c,v 1.6 2001/05/02 03:18:03 rex Exp $
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/* $Id: string.c,v 1.7 2001/05/10 04:02:21 rex Exp $
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*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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@ -148,3 +148,45 @@ BOOLEAN wstrcmpjoki(PWSTR s1, PWSTR s2)
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return(FALSE);
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}
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PWCHAR
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vfatGetNextPathElement (PWCHAR pFileName)
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{
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if (*pFileName != L'\0')
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{
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return 0;
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}
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while (*pFileName != L'\0' && *pFileName != L'\\')
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{
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pFileName++;
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}
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return pFileName;
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}
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void
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vfatWSubString (PWCHAR pTarget, const PWCHAR pSource, size_t pLength)
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{
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wcsncpy (pTarget, pSource, pLength);
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pTarget [pLength] = L'\0';
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}
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BOOL
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vfatIsFileNameValid (PWCHAR pFileName)
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{
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PWCHAR c;
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c = pFileName;
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while (*c != 0)
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{
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if (*c == L'*' || *c == L'?')
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{
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return FALSE;
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}
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c++;
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}
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return TRUE;
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}
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@ -1,4 +1,4 @@
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/* $Id: vfat.h,v 1.28 2001/05/02 03:18:03 rex Exp $ */
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/* $Id: vfat.h,v 1.29 2001/05/10 04:02:21 rex Exp $ */
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#include <ddk/ntifs.h>
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@ -240,6 +240,9 @@ BOOLEAN
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wstrcmpi(PWSTR s1, PWSTR s2);
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BOOLEAN
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wstrcmpjoki(PWSTR s1, PWSTR s2);
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PWCHAR vfatGetNextPathElement (PWCHAR pFileName);
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void vfatWSubString (PWCHAR pTarget, const PWCHAR pSource, size_t pLength);
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BOOL vfatIsFileNameValid (PWCHAR pFileName);
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/*
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* functions from fat.c
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@ -283,8 +286,24 @@ VfatOpenFile (PDEVICE_EXTENSION DeviceExt, PFILE_OBJECT FileObject,
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/* ----------------------------------------------------- FCB Functions */
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PVFATFCB vfatNewFCB (PWCHAR pFileName);
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void vfatAddFCBToTable (PDEVICE_EXTENSION pVCB, PVFATFCB pFCB);
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void vfatDestroyFCB (PVFATFCB pFCB);
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void vfatGrabFCB (PDEVICE_EXTENSION pVCB, PVFATFCB pFCB);
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void vfatReleaseFCB (PDEVICE_EXTENSION pVCB, PVFATFCB pFCB);
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void vfatAddFCBToTable (PDEVICE_EXTENSION pVCB,
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PVFATFCB pFCB);
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PVFATFCB vfatGrabFCBFromTable (PDEVICE_EXTENSION pDeviceExt,
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PWSTR pFileName);
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PVFATFCB vfatMakeRootFCB (PDEVICE_EXTENSION pVCB);
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PVFATFCB vfatOpenRootFCB (PDEVICE_EXTENSION pVCB);
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BOOL vfatFCBIsDirectory (PDEVICE_EXTENSION pVCB, PVFATFCB FCB);
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PVFATFCB vfatDirFindFile (PDEVICE_EXTENSION pVCB,
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PVFATFCB parentFCB,
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const PWSTR elementName);
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NTSTATUS vfatGetFCBForFile (PDEVICE_EXTENSION pVCB,
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PVFATFCB *pParentFCB,
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PVFATFCB *pFCB,
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const PWSTR pFileName);
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