mirror of https://github.com/reactos/reactos.git
690 lines
15 KiB
C
690 lines
15 KiB
C
/*++
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Copyright (c) 1989-2000 Microsoft Corporation
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Module Name:
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LockCtrl.c
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Abstract:
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This module implements the Lock Control routines for Cdfs called
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by the Fsd/Fsp dispatch driver.
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--*/
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#include "cdprocs.h"
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//
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// The Bug check file id for this module
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//
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#define BugCheckFileId (CDFS_BUG_CHECK_LOCKCTRL)
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE, CdCommonLockControl)
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#pragma alloc_text(PAGE, CdFastLock)
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#pragma alloc_text(PAGE, CdFastUnlockAll)
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#pragma alloc_text(PAGE, CdFastUnlockAllByKey)
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#pragma alloc_text(PAGE, CdFastUnlockSingle)
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#endif
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NTSTATUS
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CdCommonLockControl (
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_Inout_ PIRP_CONTEXT IrpContext,
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_Inout_ PIRP Irp
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)
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/*++
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Routine Description:
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This is the common routine for Lock Control called by both the fsd and fsp
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threads.
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Arguments:
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Irp - Supplies the Irp to process
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Return Value:
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NTSTATUS - The return status for the operation
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--*/
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{
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NTSTATUS Status;
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PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation( Irp );
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TYPE_OF_OPEN TypeOfOpen;
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PFCB Fcb;
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PCCB Ccb;
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PAGED_CODE();
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//
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// Extract and decode the type of file object we're being asked to process
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//
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TypeOfOpen = CdDecodeFileObject( IrpContext, IrpSp->FileObject, &Fcb, &Ccb );
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//
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// If the file is not a user file open then we reject the request
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// as an invalid parameter
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//
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if (TypeOfOpen != UserFileOpen) {
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CdCompleteRequest( IrpContext, Irp, STATUS_INVALID_PARAMETER );
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return STATUS_INVALID_PARAMETER;
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}
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//
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// We check whether we can proceed based on the state of the file oplocks.
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// This call might post the irp for us.
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//
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Status = FsRtlCheckOplock( CdGetFcbOplock(Fcb),
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Irp,
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IrpContext,
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(PVOID)CdOplockComplete,/* ReactOS Change: GCC "assignment from incompatible pointer type" */
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NULL );
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//
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// If we don't get success then the oplock package completed the request.
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//
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if (Status != STATUS_SUCCESS) {
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return Status;
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}
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//
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// Verify the Fcb.
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//
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CdVerifyFcbOperation( IrpContext, Fcb );
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//
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// If we don't have a file lock, then get one now.
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//
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if (Fcb->FileLock == NULL) { CdCreateFileLock( IrpContext, Fcb, TRUE ); }
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//
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// Now call the FsRtl routine to do the actual processing of the
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// Lock request
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//
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Status = FsRtlProcessFileLock( Fcb->FileLock, Irp, NULL );
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//
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// Set the flag indicating if Fast I/O is possible
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//
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CdLockFcb( IrpContext, Fcb );
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Fcb->IsFastIoPossible = CdIsFastIoPossible( Fcb );
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CdUnlockFcb( IrpContext, Fcb );
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//
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// Complete the request.
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//
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CdCompleteRequest( IrpContext, NULL, Status );
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return Status;
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}
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BOOLEAN
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NTAPI /* ReactOS Change: GCC Does not support STDCALL by default */
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CdFastLock (
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_In_ PFILE_OBJECT FileObject,
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_In_ PLARGE_INTEGER FileOffset,
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_In_ PLARGE_INTEGER Length,
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_In_ PEPROCESS ProcessId,
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_In_ ULONG Key,
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_In_ BOOLEAN FailImmediately,
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_In_ BOOLEAN ExclusiveLock,
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_Out_ PIO_STATUS_BLOCK IoStatus,
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_In_ PDEVICE_OBJECT DeviceObject
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)
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/*++
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Routine Description:
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This is a call back routine for doing the fast lock call.
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Arguments:
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FileObject - Supplies the file object used in this operation
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FileOffset - Supplies the file offset used in this operation
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Length - Supplies the length used in this operation
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ProcessId - Supplies the process ID used in this operation
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Key - Supplies the key used in this operation
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FailImmediately - Indicates if the request should fail immediately
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if the lock cannot be granted.
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ExclusiveLock - Indicates if this is a request for an exclusive or
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shared lock
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IoStatus - Receives the Status if this operation is successful
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Return Value:
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BOOLEAN - TRUE if this operation completed and FALSE if caller
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needs to take the long route.
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--*/
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{
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BOOLEAN Results = FALSE;
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PFCB Fcb;
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TYPE_OF_OPEN TypeOfOpen;
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PAGED_CODE();
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UNREFERENCED_PARAMETER( DeviceObject );
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ASSERT_FILE_OBJECT( FileObject );
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IoStatus->Information = 0;
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//
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// Decode the type of file object we're being asked to process and
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// make sure that is is only a user file open.
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//
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TypeOfOpen = CdFastDecodeFileObject( FileObject, &Fcb );
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if (TypeOfOpen != UserFileOpen) {
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IoStatus->Status = STATUS_INVALID_PARAMETER;
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return TRUE;
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}
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//
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// Only deal with 'good' Fcb's.
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//
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if (!CdVerifyFcbOperation( NULL, Fcb )) {
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return FALSE;
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}
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FsRtlEnterFileSystem();
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//
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// Use a try-finally to facilitate cleanup.
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//
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_SEH2_TRY {
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//
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// We check whether we can proceed based on the state of the file oplocks.
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//
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if (!FsRtlOplockIsFastIoPossible( CdGetFcbOplock(Fcb) )) {
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try_return( NOTHING );
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}
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//
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// If we don't have a file lock, then get one now.
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//
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if ((Fcb->FileLock == NULL) && !CdCreateFileLock( NULL, Fcb, FALSE )) {
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try_return( NOTHING );
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}
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//
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// Now call the FsRtl routine to perform the lock request.
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//
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#ifdef _MSC_VER
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#pragma prefast(suppress: 28159, "prefast thinks this is an obsolete routine, but it is ok for CDFS to use it")
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#endif
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if ((Results = FsRtlFastLock( Fcb->FileLock,
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FileObject,
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FileOffset,
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Length,
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ProcessId,
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Key,
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FailImmediately,
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ExclusiveLock,
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IoStatus,
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NULL,
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FALSE )) != FALSE) {
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//
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// Set the flag indicating if Fast I/O is questionable. We
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// only change this flag if the current state is possible.
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// Retest again after synchronizing on the header.
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//
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if (Fcb->IsFastIoPossible == FastIoIsPossible) {
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CdLockFcb( NULL, Fcb );
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Fcb->IsFastIoPossible = CdIsFastIoPossible( Fcb );
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CdUnlockFcb( NULL, Fcb );
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}
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}
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try_exit: NOTHING;
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} _SEH2_FINALLY {
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FsRtlExitFileSystem();
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} _SEH2_END;
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return Results;
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}
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BOOLEAN
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NTAPI /* ReactOS Change: GCC Does not support STDCALL by default */
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CdFastUnlockSingle (
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_In_ PFILE_OBJECT FileObject,
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_In_ PLARGE_INTEGER FileOffset,
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_In_ PLARGE_INTEGER Length,
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_In_ PEPROCESS ProcessId,
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_In_ ULONG Key,
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_Out_ PIO_STATUS_BLOCK IoStatus,
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_In_ PDEVICE_OBJECT DeviceObject
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)
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/*++
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Routine Description:
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This is a call back routine for doing the fast unlock single call.
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Arguments:
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FileObject - Supplies the file object used in this operation
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FileOffset - Supplies the file offset used in this operation
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Length - Supplies the length used in this operation
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ProcessId - Supplies the process ID used in this operation
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Key - Supplies the key used in this operation
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Status - Receives the Status if this operation is successful
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Return Value:
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BOOLEAN - TRUE if this operation completed and FALSE if caller
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needs to take the long route.
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--*/
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{
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BOOLEAN Results = FALSE;
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TYPE_OF_OPEN TypeOfOpen;
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PFCB Fcb;
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PAGED_CODE();
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UNREFERENCED_PARAMETER( DeviceObject );
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IoStatus->Information = 0;
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//
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// Decode the type of file object we're being asked to process and
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// make sure that is is only a user file open.
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//
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TypeOfOpen = CdFastDecodeFileObject( FileObject, &Fcb );
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if (TypeOfOpen != UserFileOpen) {
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IoStatus->Status = STATUS_INVALID_PARAMETER;
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return TRUE;
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}
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//
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// Only deal with 'good' Fcb's.
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//
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if (!CdVerifyFcbOperation( NULL, Fcb )) {
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return FALSE;
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}
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//
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// If there is no lock then return immediately.
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//
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if (Fcb->FileLock == NULL) {
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IoStatus->Status = STATUS_RANGE_NOT_LOCKED;
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return TRUE;
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}
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FsRtlEnterFileSystem();
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_SEH2_TRY {
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//
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// We check whether we can proceed based on the state of the file oplocks.
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//
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if (!FsRtlOplockIsFastIoPossible( CdGetFcbOplock(Fcb) )) {
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try_return( NOTHING );
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}
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//
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// If we don't have a file lock, then get one now.
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//
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if ((Fcb->FileLock == NULL) && !CdCreateFileLock( NULL, Fcb, FALSE )) {
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try_return( NOTHING );
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}
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//
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// Now call the FsRtl routine to do the actual processing of the
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// Lock request. The call will always succeed.
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//
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Results = TRUE;
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IoStatus->Status = FsRtlFastUnlockSingle( Fcb->FileLock,
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FileObject,
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FileOffset,
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Length,
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ProcessId,
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Key,
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NULL,
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FALSE );
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//
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// Set the flag indicating if Fast I/O is possible. We are
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// only concerned if there are no longer any filelocks on this
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// file.
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//
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if (!FsRtlAreThereCurrentFileLocks( Fcb->FileLock ) &&
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(Fcb->IsFastIoPossible != FastIoIsPossible)) {
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CdLockFcb( IrpContext, Fcb );
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Fcb->IsFastIoPossible = CdIsFastIoPossible( Fcb );
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CdUnlockFcb( IrpContext, Fcb );
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}
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try_exit: NOTHING;
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} _SEH2_FINALLY {
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FsRtlExitFileSystem();
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} _SEH2_END;
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return Results;
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}
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BOOLEAN
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NTAPI /* ReactOS Change: GCC Does not support STDCALL by default */
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CdFastUnlockAll (
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_In_ PFILE_OBJECT FileObject,
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_In_ PEPROCESS ProcessId,
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_Out_ PIO_STATUS_BLOCK IoStatus,
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_In_ PDEVICE_OBJECT DeviceObject
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)
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/*++
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Routine Description:
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This is a call back routine for doing the fast unlock all call.
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Arguments:
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FileObject - Supplies the file object used in this operation
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ProcessId - Supplies the process ID used in this operation
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Status - Receives the Status if this operation is successful
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Return Value:
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BOOLEAN - TRUE if this operation completed and FALSE if caller
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needs to take the long route.
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--*/
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{
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BOOLEAN Results = FALSE;
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TYPE_OF_OPEN TypeOfOpen;
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PFCB Fcb;
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PAGED_CODE();
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UNREFERENCED_PARAMETER( DeviceObject );
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IoStatus->Information = 0;
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//
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// Decode the type of file object we're being asked to process and
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// make sure that is is only a user file open.
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//
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TypeOfOpen = CdFastDecodeFileObject( FileObject, &Fcb );
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if (TypeOfOpen != UserFileOpen) {
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IoStatus->Status = STATUS_INVALID_PARAMETER;
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return TRUE;
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}
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//
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// Only deal with 'good' Fcb's.
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//
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if (!CdVerifyFcbOperation( NULL, Fcb )) {
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return FALSE;
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}
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//
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// If there is no lock then return immediately.
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//
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if (Fcb->FileLock == NULL) {
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IoStatus->Status = STATUS_RANGE_NOT_LOCKED;
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return TRUE;
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}
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FsRtlEnterFileSystem();
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_SEH2_TRY {
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//
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// We check whether we can proceed based on the state of the file oplocks.
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//
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if (!FsRtlOplockIsFastIoPossible( CdGetFcbOplock(Fcb) )) {
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try_return( NOTHING );
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}
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//
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// If we don't have a file lock, then get one now.
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//
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if ((Fcb->FileLock == NULL) && !CdCreateFileLock( NULL, Fcb, FALSE )) {
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try_return( NOTHING );
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}
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//
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// Now call the FsRtl routine to do the actual processing of the
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// Lock request. The call will always succeed.
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//
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Results = TRUE;
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IoStatus->Status = FsRtlFastUnlockAll( Fcb->FileLock,
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FileObject,
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ProcessId,
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NULL );
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//
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// Set the flag indicating if Fast I/O is possible
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//
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CdLockFcb( IrpContext, Fcb );
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Fcb->IsFastIoPossible = CdIsFastIoPossible( Fcb );
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CdUnlockFcb( IrpContext, Fcb );
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try_exit: NOTHING;
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} _SEH2_FINALLY {
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FsRtlExitFileSystem();
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} _SEH2_END;
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return Results;
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}
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BOOLEAN
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NTAPI /* ReactOS Change: GCC Does not support STDCALL by default */
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CdFastUnlockAllByKey (
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_In_ PFILE_OBJECT FileObject,
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_In_ PVOID ProcessId,
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_In_ ULONG Key,
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_Out_ PIO_STATUS_BLOCK IoStatus,
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_In_ PDEVICE_OBJECT DeviceObject
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)
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/*++
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Routine Description:
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This is a call back routine for doing the fast unlock all by key call.
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Arguments:
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FileObject - Supplies the file object used in this operation
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ProcessId - Supplies the process ID used in this operation
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Key - Supplies the key used in this operation
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Status - Receives the Status if this operation is successful
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Return Value:
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BOOLEAN - TRUE if this operation completed and FALSE if caller
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needs to take the long route.
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--*/
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{
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BOOLEAN Results = FALSE;
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TYPE_OF_OPEN TypeOfOpen;
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PFCB Fcb;
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PAGED_CODE();
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UNREFERENCED_PARAMETER( DeviceObject );
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IoStatus->Information = 0;
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//
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// Decode the type of file object we're being asked to process and
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// make sure that is is only a user file open.
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//
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TypeOfOpen = CdFastDecodeFileObject( FileObject, &Fcb );
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if (TypeOfOpen != UserFileOpen) {
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IoStatus->Status = STATUS_INVALID_PARAMETER;
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return TRUE;
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}
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//
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// Only deal with 'good' Fcb's.
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//
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if (!CdVerifyFcbOperation( NULL, Fcb )) {
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return FALSE;
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}
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//
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// If there is no lock then return immediately.
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//
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if (Fcb->FileLock == NULL) {
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IoStatus->Status = STATUS_RANGE_NOT_LOCKED;
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return TRUE;
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}
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FsRtlEnterFileSystem();
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_SEH2_TRY {
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//
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// We check whether we can proceed based on the state of the file oplocks.
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//
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if (!FsRtlOplockIsFastIoPossible( CdGetFcbOplock(Fcb) )) {
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try_return( NOTHING );
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}
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//
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// If we don't have a file lock, then get one now.
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//
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|
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if ((Fcb->FileLock == NULL) && !CdCreateFileLock( NULL, Fcb, FALSE )) {
|
|
|
|
try_return( NOTHING );
|
|
}
|
|
|
|
//
|
|
// Now call the FsRtl routine to do the actual processing of the
|
|
// Lock request. The call will always succeed.
|
|
//
|
|
|
|
Results = TRUE;
|
|
IoStatus->Status = FsRtlFastUnlockAllByKey( Fcb->FileLock,
|
|
FileObject,
|
|
ProcessId,
|
|
Key,
|
|
NULL );
|
|
|
|
|
|
//
|
|
// Set the flag indicating if Fast I/O is possible
|
|
//
|
|
|
|
CdLockFcb( IrpContext, Fcb );
|
|
Fcb->IsFastIoPossible = CdIsFastIoPossible( Fcb );
|
|
CdUnlockFcb( IrpContext, Fcb );
|
|
|
|
try_exit: NOTHING;
|
|
} _SEH2_FINALLY {
|
|
|
|
FsRtlExitFileSystem();
|
|
} _SEH2_END;
|
|
|
|
return Results;
|
|
}
|
|
|
|
|
|
|