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[NTOS]

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- Implement two types of FsRtl locking functions: exclusive lock and Cc flushing lock, along with their releasing counterparts, without the filter callbacks support. These functions are unused in trunk now but would be needed by proper Cc/Mm/IFS in future.

svn path=/trunk/; revision=59889
This commit is contained in:
Aleksey Bragin 2013-08-29 22:07:24 +00:00
parent 7286005d2c
commit a484270b02
1 changed files with 160 additions and 4 deletions
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164
reactos/ntoskrnl/fsrtl/fastio.c
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@ -4,6 +4,7 @@
* FILE: ntoskrnl/fsrtl/fastio.c
* PURPOSE: Provides Fast I/O entrypoints to the Cache Manager
* PROGRAMMERS: buzdelabuz2@gmail.com,alex.ionescu@reactos.org
* Aleksey Bragin <aleksey@reactos.org>
*/
/* INCLUDES ******************************************************************/
@ -1558,6 +1559,40 @@ Cleanup:
return Result;
}
NTSTATUS
NTAPI
FsRtlAcquireFileExclusiveCommon(IN PFILE_OBJECT FileObject,
IN FS_FILTER_SECTION_SYNC_TYPE SyncType,
IN ULONG Reserved)
{
PFSRTL_COMMON_FCB_HEADER FcbHeader;
PDEVICE_OBJECT DeviceObject;
PFAST_IO_DISPATCH FastDispatch;
/* Get Device Object and Fast Calls */
FcbHeader = (PFSRTL_COMMON_FCB_HEADER)FileObject->FsContext;
DeviceObject = IoGetRelatedDeviceObject(FileObject);
FastDispatch = DeviceObject->DriverObject->FastIoDispatch;
/* Get master FsRtl lock */
FsRtlEnterFileSystem();
/* Check if Fast Calls are supported, and check AcquireFileForNtCreateSection */
if (FastDispatch &&
FastDispatch->AcquireFileForNtCreateSection)
{
/* Call the AcquireFileForNtCreateSection FastIo handler */
FastDispatch->AcquireFileForNtCreateSection(FileObject);
}
else
{
/* No FastIo handler, acquire file's resource exclusively */
if (FcbHeader && FcbHeader->Resource) ExAcquireResourceExclusiveLite(FcbHeader->Resource, TRUE);
}
return STATUS_SUCCESS;
}
/*
* @implemented
*/
@ -1565,9 +1600,10 @@ VOID
NTAPI
FsRtlAcquireFileExclusive(IN PFILE_OBJECT FileObject)
{
/* PAGED_CODE(); */
/* FsRtlAcquireFileExclusiveCommon(FileObject, 0, 0); */
KeBugCheck(FILE_SYSTEM);
PAGED_CODE();
/* Call the common routine. Don't care about the result */
(VOID)FsRtlAcquireFileExclusiveCommon(FileObject, SyncTypeOther, 0);
}
/*
@ -1577,7 +1613,127 @@ VOID
NTAPI
FsRtlReleaseFile(IN PFILE_OBJECT FileObject)
{
KeBugCheck(FILE_SYSTEM);
PFSRTL_COMMON_FCB_HEADER FcbHeader;
PDEVICE_OBJECT DeviceObject;
PFAST_IO_DISPATCH FastDispatch;
/* Get Device Object and Fast Calls */
FcbHeader = (PFSRTL_COMMON_FCB_HEADER)FileObject->FsContext;
DeviceObject = IoGetRelatedDeviceObject(FileObject);
FastDispatch = DeviceObject->DriverObject->FastIoDispatch;
/* Check if Fast Calls are supported and check ReleaseFileForNtCreateSection */
if (FastDispatch &&
FastDispatch->ReleaseFileForNtCreateSection)
{
/* Call the ReleaseFileForNtCreateSection FastIo handler */
FastDispatch->ReleaseFileForNtCreateSection(FileObject);
}
else
{
/* No FastIo handler, release file's resource */
if (FcbHeader && FcbHeader->Resource) ExReleaseResourceLite(FcbHeader->Resource);
}
/* Release master FsRtl lock */
FsRtlExitFileSystem();
}
/*
* @implemented
*/
NTSTATUS
NTAPI
FsRtlAcquireFileForCcFlushEx(IN PFILE_OBJECT FileObject)
{
PFSRTL_COMMON_FCB_HEADER FcbHeader;
PDEVICE_OBJECT DeviceObject, BaseDeviceObject;
PFAST_IO_DISPATCH FastDispatch;
/* Get the Base File System (Volume) and Fast Calls */
FcbHeader = (PFSRTL_COMMON_FCB_HEADER)FileObject->FsContext;
DeviceObject = IoGetRelatedDeviceObject(FileObject);
BaseDeviceObject = IoGetBaseFileSystemDeviceObject(FileObject);
FastDispatch = DeviceObject->DriverObject->FastIoDispatch;
/* Get master FsRtl lock */
FsRtlEnterFileSystem();
/* Check if Fast Calls are supported, and check AcquireForCcFlush */
if (FastDispatch &&
FastDispatch->AcquireForCcFlush)
{
/* Call the AcquireForCcFlush FastIo handler */
FastDispatch->AcquireForCcFlush(FileObject, BaseDeviceObject);
}
else
{
/* No FastIo handler, acquire file's resource */
if (FcbHeader->Resource)
{
/* Acquire it - either shared if it's already acquired
or exclusively if we are the first */
if (ExIsResourceAcquiredSharedLite(FcbHeader->Resource))
ExAcquireResourceSharedLite(FcbHeader->Resource, TRUE);
else
ExAcquireResourceExclusiveLite(FcbHeader->Resource, TRUE);
}
/* Also acquire its Paging I/O resource */
if (FcbHeader->PagingIoResource)
ExAcquireResourceSharedLite(FcbHeader->PagingIoResource, TRUE);
}
return STATUS_SUCCESS;
}
/*
* @implemented
*/
VOID
NTAPI
FsRtlAcquireFileForCcFlush(IN PFILE_OBJECT FileObject)
{
PAGED_CODE();
/* Call the common routine. Don't care about the result */
(VOID)FsRtlAcquireFileForCcFlushEx(FileObject);
}
/*
* @implemented
*/
VOID
NTAPI
FsRtlReleaseFileForCcFlush(IN PFILE_OBJECT FileObject)
{
PFSRTL_COMMON_FCB_HEADER FcbHeader;
PDEVICE_OBJECT DeviceObject, BaseDeviceObject;
PFAST_IO_DISPATCH FastDispatch;
/* Get Device Object and Fast Calls */
FcbHeader = (PFSRTL_COMMON_FCB_HEADER)FileObject->FsContext;
DeviceObject = IoGetRelatedDeviceObject(FileObject);
BaseDeviceObject = IoGetBaseFileSystemDeviceObject(FileObject);
FastDispatch = DeviceObject->DriverObject->FastIoDispatch;
/* Check if Fast Calls are supported, and check ReleaseForCcFlush */
if (FastDispatch &&
FastDispatch->ReleaseForCcFlush)
{
/* Call the ReleaseForCcFlush FastIo handler */
FastDispatch->ReleaseForCcFlush(FileObject, BaseDeviceObject);
}
else
{
/* No FastIo handler, release PagingIO and then file's resource */
if (FcbHeader->PagingIoResource) ExReleaseResourceLite(FcbHeader->PagingIoResource);
if (FcbHeader->Resource) ExReleaseResourceLite(FcbHeader->Resource);
}
/* Release master FsRtl lock */
FsRtlExitFileSystem();
}
/*++