mirror of
https://github.com/reactos/reactos.git
synced 2024-11-20 14:30:57 +00:00
689 lines
15 KiB
C
Executable file
689 lines
15 KiB
C
Executable file
/*++
|
||
|
||
Copyright (c) 1989-2000 Microsoft Corporation
|
||
|
||
Module Name:
|
||
|
||
LockCtrl.c
|
||
|
||
Abstract:
|
||
|
||
This module implements the Lock Control routines for Cdfs called
|
||
by the Fsd/Fsp dispatch driver.
|
||
|
||
|
||
--*/
|
||
|
||
#include "cdprocs.h"
|
||
|
||
//
|
||
// The Bug check file id for this module
|
||
//
|
||
|
||
#define BugCheckFileId (CDFS_BUG_CHECK_LOCKCTRL)
|
||
|
||
#ifdef ALLOC_PRAGMA
|
||
#pragma alloc_text(PAGE, CdCommonLockControl)
|
||
#pragma alloc_text(PAGE, CdFastLock)
|
||
#pragma alloc_text(PAGE, CdFastUnlockAll)
|
||
#pragma alloc_text(PAGE, CdFastUnlockAllByKey)
|
||
#pragma alloc_text(PAGE, CdFastUnlockSingle)
|
||
#endif
|
||
|
||
|
||
NTSTATUS
|
||
CdCommonLockControl (
|
||
_Inout_ PIRP_CONTEXT IrpContext,
|
||
_Inout_ PIRP Irp
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This is the common routine for Lock Control called by both the fsd and fsp
|
||
threads.
|
||
|
||
Arguments:
|
||
|
||
Irp - Supplies the Irp to process
|
||
|
||
Return Value:
|
||
|
||
NTSTATUS - The return status for the operation
|
||
|
||
--*/
|
||
|
||
{
|
||
NTSTATUS Status;
|
||
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation( Irp );
|
||
|
||
TYPE_OF_OPEN TypeOfOpen;
|
||
PFCB Fcb;
|
||
PCCB Ccb;
|
||
|
||
PAGED_CODE();
|
||
|
||
//
|
||
// Extract and decode the type of file object we're being asked to process
|
||
//
|
||
|
||
TypeOfOpen = CdDecodeFileObject( IrpContext, IrpSp->FileObject, &Fcb, &Ccb );
|
||
|
||
//
|
||
// If the file is not a user file open then we reject the request
|
||
// as an invalid parameter
|
||
//
|
||
|
||
if (TypeOfOpen != UserFileOpen) {
|
||
|
||
CdCompleteRequest( IrpContext, Irp, STATUS_INVALID_PARAMETER );
|
||
return STATUS_INVALID_PARAMETER;
|
||
}
|
||
|
||
//
|
||
// We check whether we can proceed based on the state of the file oplocks.
|
||
// This call might post the irp for us.
|
||
//
|
||
|
||
Status = FsRtlCheckOplock( CdGetFcbOplock(Fcb),
|
||
Irp,
|
||
IrpContext,
|
||
(PVOID)CdOplockComplete,/* ReactOS Change: GCC "assignment from incompatible pointer type" */
|
||
NULL );
|
||
|
||
//
|
||
// If we don't get success then the oplock package completed the request.
|
||
//
|
||
|
||
if (Status != STATUS_SUCCESS) {
|
||
|
||
return Status;
|
||
}
|
||
|
||
//
|
||
// Verify the Fcb.
|
||
//
|
||
|
||
CdVerifyFcbOperation( IrpContext, Fcb );
|
||
|
||
//
|
||
// If we don't have a file lock, then get one now.
|
||
//
|
||
|
||
if (Fcb->FileLock == NULL) { CdCreateFileLock( IrpContext, Fcb, TRUE ); }
|
||
|
||
//
|
||
// Now call the FsRtl routine to do the actual processing of the
|
||
// Lock request
|
||
//
|
||
|
||
Status = FsRtlProcessFileLock( Fcb->FileLock, Irp, NULL );
|
||
|
||
//
|
||
// Set the flag indicating if Fast I/O is possible
|
||
//
|
||
|
||
CdLockFcb( IrpContext, Fcb );
|
||
Fcb->IsFastIoPossible = CdIsFastIoPossible( Fcb );
|
||
CdUnlockFcb( IrpContext, Fcb );
|
||
|
||
//
|
||
// Complete the request.
|
||
//
|
||
|
||
CdCompleteRequest( IrpContext, NULL, Status );
|
||
return Status;
|
||
}
|
||
|
||
|
||
BOOLEAN
|
||
NTAPI /* ReactOS Change: GCC Does not support STDCALL by default */
|
||
CdFastLock (
|
||
_In_ PFILE_OBJECT FileObject,
|
||
_In_ PLARGE_INTEGER FileOffset,
|
||
_In_ PLARGE_INTEGER Length,
|
||
_In_ PEPROCESS ProcessId,
|
||
_In_ ULONG Key,
|
||
_In_ BOOLEAN FailImmediately,
|
||
_In_ BOOLEAN ExclusiveLock,
|
||
_Out_ PIO_STATUS_BLOCK IoStatus,
|
||
_In_ PDEVICE_OBJECT DeviceObject
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This is a call back routine for doing the fast lock call.
|
||
|
||
Arguments:
|
||
|
||
FileObject - Supplies the file object used in this operation
|
||
|
||
FileOffset - Supplies the file offset used in this operation
|
||
|
||
Length - Supplies the length used in this operation
|
||
|
||
ProcessId - Supplies the process ID used in this operation
|
||
|
||
Key - Supplies the key used in this operation
|
||
|
||
FailImmediately - Indicates if the request should fail immediately
|
||
if the lock cannot be granted.
|
||
|
||
ExclusiveLock - Indicates if this is a request for an exclusive or
|
||
shared lock
|
||
|
||
IoStatus - Receives the Status if this operation is successful
|
||
|
||
Return Value:
|
||
|
||
BOOLEAN - TRUE if this operation completed and FALSE if caller
|
||
needs to take the long route.
|
||
|
||
--*/
|
||
|
||
{
|
||
BOOLEAN Results = FALSE;
|
||
|
||
PFCB Fcb;
|
||
TYPE_OF_OPEN TypeOfOpen;
|
||
|
||
PAGED_CODE();
|
||
|
||
UNREFERENCED_PARAMETER( DeviceObject );
|
||
|
||
ASSERT_FILE_OBJECT( FileObject );
|
||
|
||
IoStatus->Information = 0;
|
||
|
||
//
|
||
// Decode the type of file object we're being asked to process and
|
||
// make sure that is is only a user file open.
|
||
//
|
||
|
||
TypeOfOpen = CdFastDecodeFileObject( FileObject, &Fcb );
|
||
|
||
if (TypeOfOpen != UserFileOpen) {
|
||
|
||
IoStatus->Status = STATUS_INVALID_PARAMETER;
|
||
return TRUE;
|
||
}
|
||
|
||
//
|
||
// Only deal with 'good' Fcb's.
|
||
//
|
||
|
||
if (!CdVerifyFcbOperation( NULL, Fcb )) {
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
FsRtlEnterFileSystem();
|
||
|
||
//
|
||
// Use a try-finally to facilitate cleanup.
|
||
//
|
||
|
||
_SEH2_TRY {
|
||
|
||
//
|
||
// We check whether we can proceed based on the state of the file oplocks.
|
||
//
|
||
|
||
if (!FsRtlOplockIsFastIoPossible( CdGetFcbOplock(Fcb) )) {
|
||
|
||
try_return( NOTHING );
|
||
}
|
||
|
||
//
|
||
// If we don't have a file lock, then get one now.
|
||
//
|
||
|
||
if ((Fcb->FileLock == NULL) && !CdCreateFileLock( NULL, Fcb, FALSE )) {
|
||
|
||
try_return( NOTHING );
|
||
}
|
||
|
||
//
|
||
// Now call the FsRtl routine to perform the lock request.
|
||
//
|
||
|
||
#ifdef _MSC_VER
|
||
#pragma prefast(suppress: 28159, "prefast thinks this is an obsolete routine, but it is ok for CDFS to use it")
|
||
#endif
|
||
if ((Results = FsRtlFastLock( Fcb->FileLock,
|
||
FileObject,
|
||
FileOffset,
|
||
Length,
|
||
ProcessId,
|
||
Key,
|
||
FailImmediately,
|
||
ExclusiveLock,
|
||
IoStatus,
|
||
NULL,
|
||
FALSE )) != FALSE) {
|
||
|
||
//
|
||
// Set the flag indicating if Fast I/O is questionable. We
|
||
// only change this flag if the current state is possible.
|
||
// Retest again after synchronizing on the header.
|
||
//
|
||
|
||
if (Fcb->IsFastIoPossible == FastIoIsPossible) {
|
||
|
||
CdLockFcb( NULL, Fcb );
|
||
Fcb->IsFastIoPossible = CdIsFastIoPossible( Fcb );
|
||
CdUnlockFcb( NULL, Fcb );
|
||
}
|
||
}
|
||
|
||
try_exit: NOTHING;
|
||
} _SEH2_FINALLY {
|
||
|
||
FsRtlExitFileSystem();
|
||
} _SEH2_END;
|
||
|
||
return Results;
|
||
}
|
||
|
||
|
||
BOOLEAN
|
||
NTAPI /* ReactOS Change: GCC Does not support STDCALL by default */
|
||
CdFastUnlockSingle (
|
||
_In_ PFILE_OBJECT FileObject,
|
||
_In_ PLARGE_INTEGER FileOffset,
|
||
_In_ PLARGE_INTEGER Length,
|
||
_In_ PEPROCESS ProcessId,
|
||
_In_ ULONG Key,
|
||
_Out_ PIO_STATUS_BLOCK IoStatus,
|
||
_In_ PDEVICE_OBJECT DeviceObject
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This is a call back routine for doing the fast unlock single call.
|
||
|
||
Arguments:
|
||
|
||
FileObject - Supplies the file object used in this operation
|
||
|
||
FileOffset - Supplies the file offset used in this operation
|
||
|
||
Length - Supplies the length used in this operation
|
||
|
||
ProcessId - Supplies the process ID used in this operation
|
||
|
||
Key - Supplies the key used in this operation
|
||
|
||
Status - Receives the Status if this operation is successful
|
||
|
||
Return Value:
|
||
|
||
BOOLEAN - TRUE if this operation completed and FALSE if caller
|
||
needs to take the long route.
|
||
|
||
--*/
|
||
|
||
{
|
||
BOOLEAN Results = FALSE;
|
||
TYPE_OF_OPEN TypeOfOpen;
|
||
PFCB Fcb;
|
||
|
||
PAGED_CODE();
|
||
|
||
UNREFERENCED_PARAMETER( DeviceObject );
|
||
|
||
IoStatus->Information = 0;
|
||
|
||
//
|
||
// Decode the type of file object we're being asked to process and
|
||
// make sure that is is only a user file open.
|
||
//
|
||
|
||
TypeOfOpen = CdFastDecodeFileObject( FileObject, &Fcb );
|
||
|
||
if (TypeOfOpen != UserFileOpen) {
|
||
|
||
IoStatus->Status = STATUS_INVALID_PARAMETER;
|
||
return TRUE;
|
||
}
|
||
|
||
//
|
||
// Only deal with 'good' Fcb's.
|
||
//
|
||
|
||
if (!CdVerifyFcbOperation( NULL, Fcb )) {
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
//
|
||
// If there is no lock then return immediately.
|
||
//
|
||
|
||
if (Fcb->FileLock == NULL) {
|
||
|
||
IoStatus->Status = STATUS_RANGE_NOT_LOCKED;
|
||
return TRUE;
|
||
}
|
||
|
||
FsRtlEnterFileSystem();
|
||
|
||
_SEH2_TRY {
|
||
|
||
//
|
||
// We check whether we can proceed based on the state of the file oplocks.
|
||
//
|
||
|
||
if (!FsRtlOplockIsFastIoPossible( CdGetFcbOplock(Fcb) )) {
|
||
|
||
try_return( NOTHING );
|
||
}
|
||
|
||
//
|
||
// If we don't have a file lock, then get one now.
|
||
//
|
||
|
||
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 = FsRtlFastUnlockSingle( Fcb->FileLock,
|
||
FileObject,
|
||
FileOffset,
|
||
Length,
|
||
ProcessId,
|
||
Key,
|
||
NULL,
|
||
FALSE );
|
||
|
||
//
|
||
// Set the flag indicating if Fast I/O is possible. We are
|
||
// only concerned if there are no longer any filelocks on this
|
||
// file.
|
||
//
|
||
|
||
if (!FsRtlAreThereCurrentFileLocks( Fcb->FileLock ) &&
|
||
(Fcb->IsFastIoPossible != FastIoIsPossible)) {
|
||
|
||
CdLockFcb( IrpContext, Fcb );
|
||
Fcb->IsFastIoPossible = CdIsFastIoPossible( Fcb );
|
||
CdUnlockFcb( IrpContext, Fcb );
|
||
}
|
||
|
||
try_exit: NOTHING;
|
||
} _SEH2_FINALLY {
|
||
|
||
FsRtlExitFileSystem();
|
||
} _SEH2_END;
|
||
|
||
return Results;
|
||
}
|
||
|
||
|
||
BOOLEAN
|
||
NTAPI /* ReactOS Change: GCC Does not support STDCALL by default */
|
||
CdFastUnlockAll (
|
||
_In_ PFILE_OBJECT FileObject,
|
||
_In_ PEPROCESS ProcessId,
|
||
_Out_ PIO_STATUS_BLOCK IoStatus,
|
||
_In_ PDEVICE_OBJECT DeviceObject
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This is a call back routine for doing the fast unlock all call.
|
||
|
||
Arguments:
|
||
|
||
FileObject - Supplies the file object used in this operation
|
||
|
||
ProcessId - Supplies the process ID used in this operation
|
||
|
||
Status - Receives the Status if this operation is successful
|
||
|
||
Return Value:
|
||
|
||
BOOLEAN - TRUE if this operation completed and FALSE if caller
|
||
needs to take the long route.
|
||
|
||
--*/
|
||
|
||
{
|
||
BOOLEAN Results = FALSE;
|
||
TYPE_OF_OPEN TypeOfOpen;
|
||
PFCB Fcb;
|
||
|
||
PAGED_CODE();
|
||
|
||
UNREFERENCED_PARAMETER( DeviceObject );
|
||
|
||
IoStatus->Information = 0;
|
||
|
||
//
|
||
// Decode the type of file object we're being asked to process and
|
||
// make sure that is is only a user file open.
|
||
//
|
||
|
||
TypeOfOpen = CdFastDecodeFileObject( FileObject, &Fcb );
|
||
|
||
if (TypeOfOpen != UserFileOpen) {
|
||
|
||
IoStatus->Status = STATUS_INVALID_PARAMETER;
|
||
return TRUE;
|
||
}
|
||
|
||
//
|
||
// Only deal with 'good' Fcb's.
|
||
//
|
||
|
||
if (!CdVerifyFcbOperation( NULL, Fcb )) {
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
//
|
||
// If there is no lock then return immediately.
|
||
//
|
||
|
||
if (Fcb->FileLock == NULL) {
|
||
|
||
IoStatus->Status = STATUS_RANGE_NOT_LOCKED;
|
||
return TRUE;
|
||
}
|
||
|
||
FsRtlEnterFileSystem();
|
||
|
||
_SEH2_TRY {
|
||
|
||
//
|
||
// We check whether we can proceed based on the state of the file oplocks.
|
||
//
|
||
|
||
if (!FsRtlOplockIsFastIoPossible( CdGetFcbOplock(Fcb) )) {
|
||
|
||
try_return( NOTHING );
|
||
}
|
||
|
||
//
|
||
// If we don't have a file lock, then get one now.
|
||
//
|
||
|
||
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 = FsRtlFastUnlockAll( Fcb->FileLock,
|
||
FileObject,
|
||
ProcessId,
|
||
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;
|
||
}
|
||
|
||
|
||
BOOLEAN
|
||
NTAPI /* ReactOS Change: GCC Does not support STDCALL by default */
|
||
CdFastUnlockAllByKey (
|
||
_In_ PFILE_OBJECT FileObject,
|
||
_In_ PVOID ProcessId,
|
||
_In_ ULONG Key,
|
||
_Out_ PIO_STATUS_BLOCK IoStatus,
|
||
_In_ PDEVICE_OBJECT DeviceObject
|
||
)
|
||
|
||
/*++
|
||
|
||
Routine Description:
|
||
|
||
This is a call back routine for doing the fast unlock all by key call.
|
||
|
||
Arguments:
|
||
|
||
FileObject - Supplies the file object used in this operation
|
||
|
||
ProcessId - Supplies the process ID used in this operation
|
||
|
||
Key - Supplies the key used in this operation
|
||
|
||
Status - Receives the Status if this operation is successful
|
||
|
||
Return Value:
|
||
|
||
BOOLEAN - TRUE if this operation completed and FALSE if caller
|
||
needs to take the long route.
|
||
|
||
--*/
|
||
|
||
{
|
||
BOOLEAN Results = FALSE;
|
||
TYPE_OF_OPEN TypeOfOpen;
|
||
PFCB Fcb;
|
||
|
||
PAGED_CODE();
|
||
|
||
UNREFERENCED_PARAMETER( DeviceObject );
|
||
|
||
IoStatus->Information = 0;
|
||
|
||
//
|
||
// Decode the type of file object we're being asked to process and
|
||
// make sure that is is only a user file open.
|
||
//
|
||
|
||
TypeOfOpen = CdFastDecodeFileObject( FileObject, &Fcb );
|
||
|
||
if (TypeOfOpen != UserFileOpen) {
|
||
|
||
IoStatus->Status = STATUS_INVALID_PARAMETER;
|
||
return TRUE;
|
||
}
|
||
|
||
//
|
||
// Only deal with 'good' Fcb's.
|
||
//
|
||
|
||
if (!CdVerifyFcbOperation( NULL, Fcb )) {
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
//
|
||
// If there is no lock then return immediately.
|
||
//
|
||
|
||
if (Fcb->FileLock == NULL) {
|
||
|
||
IoStatus->Status = STATUS_RANGE_NOT_LOCKED;
|
||
return TRUE;
|
||
}
|
||
|
||
FsRtlEnterFileSystem();
|
||
|
||
_SEH2_TRY {
|
||
|
||
//
|
||
// We check whether we can proceed based on the state of the file oplocks.
|
||
//
|
||
|
||
if (!FsRtlOplockIsFastIoPossible( CdGetFcbOplock(Fcb) )) {
|
||
|
||
try_return( NOTHING );
|
||
}
|
||
|
||
//
|
||
// If we don't have a file lock, then get one now.
|
||
//
|
||
|
||
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;
|
||
}
|
||
|
||
|
||
|