You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
604 lines
16 KiB
604 lines
16 KiB
/*++
|
|
|
|
Copyright (c) 1998-1999 Microsoft Corporation
|
|
|
|
Module Name:
|
|
|
|
internal.c
|
|
|
|
Abstract:
|
|
|
|
User-mode interface to SR.SYS.
|
|
|
|
Author:
|
|
|
|
Keith Moore (keithmo) 15-Dec-1998 (ul.sys)
|
|
Paul McDaniel (paulmcd) 07-Mar-2000
|
|
|
|
Revision History:
|
|
|
|
--*/
|
|
|
|
|
|
#include "precomp.h"
|
|
|
|
|
|
//
|
|
// Private macros.
|
|
//
|
|
|
|
#define EA_BUFFER_LENGTH \
|
|
( sizeof(FILE_FULL_EA_INFORMATION) + \
|
|
SR_OPEN_PACKET_NAME_LENGTH + \
|
|
sizeof(SR_OPEN_PACKET) )
|
|
|
|
|
|
//
|
|
// Private prototypes.
|
|
//
|
|
|
|
NTSTATUS
|
|
SrpAcquireCachedEvent(
|
|
OUT PHANDLE pEvent
|
|
);
|
|
|
|
VOID
|
|
SrpReleaseCachedEvent(
|
|
IN HANDLE Event
|
|
);
|
|
|
|
|
|
//
|
|
// Public functions.
|
|
//
|
|
|
|
/***************************************************************************++
|
|
|
|
Routine Description:
|
|
|
|
Synchronous wrapper around NtDeviceIoControlFile().
|
|
|
|
Arguments:
|
|
|
|
FileHandle - Supplies a handle to the file on which the service is
|
|
being performed.
|
|
|
|
IoControlCode - Subfunction code to determine exactly what operation
|
|
is being performed.
|
|
|
|
pInputBuffer - Optionally supplies an input buffer to be passed to the
|
|
device driver. Whether or not the buffer is actually optional is
|
|
dependent on the IoControlCode.
|
|
|
|
InputBufferLength - Length of the pInputBuffer in bytes.
|
|
|
|
pOutputBuffer - Optionally supplies an output buffer to receive
|
|
information from the device driver. Whether or not the buffer is
|
|
actually optional is dependent on the IoControlCode.
|
|
|
|
OutputBufferLength - Length of the pOutputBuffer in bytes.
|
|
|
|
pBytesTransferred - Optionally receives the number of bytes transferred.
|
|
|
|
Return Value:
|
|
|
|
NTSTATUS - Completion status.
|
|
|
|
--***************************************************************************/
|
|
NTSTATUS
|
|
SrpSynchronousDeviceControl(
|
|
IN HANDLE FileHandle,
|
|
IN ULONG IoControlCode,
|
|
IN PVOID pInputBuffer OPTIONAL,
|
|
IN ULONG InputBufferLength,
|
|
OUT PVOID pOutputBuffer OPTIONAL,
|
|
IN ULONG OutputBufferLength,
|
|
OUT PULONG pBytesTransferred OPTIONAL
|
|
)
|
|
{
|
|
NTSTATUS status;
|
|
IO_STATUS_BLOCK ioStatusBlock;
|
|
HANDLE event;
|
|
LARGE_INTEGER timeout;
|
|
|
|
//
|
|
// Try to snag an event object.
|
|
//
|
|
|
|
status = SrpAcquireCachedEvent( &event );
|
|
|
|
if (NT_SUCCESS(status))
|
|
{
|
|
//
|
|
// Make the call.
|
|
//
|
|
|
|
status = NtDeviceIoControlFile(
|
|
FileHandle, // FileHandle
|
|
event, // Event
|
|
NULL, // ApcRoutine
|
|
NULL, // ApcContext
|
|
&ioStatusBlock, // IoStatusBlock
|
|
IoControlCode, // IoControlCode
|
|
pInputBuffer, // InputBuffer
|
|
InputBufferLength, // InputBufferLength
|
|
pOutputBuffer, // OutputBuffer
|
|
OutputBufferLength // OutputBufferLength
|
|
);
|
|
|
|
if (status == STATUS_PENDING)
|
|
{
|
|
//
|
|
// Wait for it to complete.
|
|
//
|
|
|
|
timeout.LowPart = 0xFFFFFFFF;
|
|
timeout.HighPart = 0x7FFFFFFF;
|
|
|
|
status = NtWaitForSingleObject( event, FALSE, &timeout );
|
|
ASSERT( status == STATUS_SUCCESS );
|
|
|
|
status = ioStatusBlock.Status;
|
|
}
|
|
|
|
//
|
|
// If the call didn't fail and the caller wants the number
|
|
// of bytes transferred, grab the value from the I/O status
|
|
// block & return it.
|
|
//
|
|
|
|
if (!NT_ERROR(status) && pBytesTransferred != NULL)
|
|
{
|
|
*pBytesTransferred = (ULONG)ioStatusBlock.Information;
|
|
}
|
|
|
|
//
|
|
// Release the cached event object we acquired above.
|
|
//
|
|
|
|
SrpReleaseCachedEvent( event );
|
|
}
|
|
|
|
return status;
|
|
|
|
} // SrpSynchronousDeviceControl
|
|
|
|
|
|
/***************************************************************************++
|
|
|
|
Routine Description:
|
|
|
|
Overlapped wrapper around NtDeviceIoControlFile().
|
|
|
|
Arguments:
|
|
|
|
FileHandle - Supplies a handle to the file on which the service is
|
|
being performed.
|
|
|
|
pOverlapped - Supplies an OVERLAPPED structure.
|
|
|
|
IoControlCode - Subfunction code to determine exactly what operation
|
|
is being performed.
|
|
|
|
pInputBuffer - Optionally supplies an input buffer to be passed to the
|
|
device driver. Whether or not the buffer is actually optional is
|
|
dependent on the IoControlCode.
|
|
|
|
InputBufferLength - Length of the pInputBuffer in bytes.
|
|
|
|
pOutputBuffer - Optionally supplies an output buffer to receive
|
|
information from the device driver. Whether or not the buffer is
|
|
actually optional is dependent on the IoControlCode.
|
|
|
|
OutputBufferLength - Length of the pOutputBuffer in bytes.
|
|
|
|
pBytesTransferred - Optionally receives the number of bytes transferred.
|
|
|
|
Return Value:
|
|
|
|
NTSTATUS - Completion status.
|
|
|
|
--***************************************************************************/
|
|
NTSTATUS
|
|
SrpOverlappedDeviceControl(
|
|
IN HANDLE FileHandle,
|
|
IN OUT LPOVERLAPPED pOverlapped,
|
|
IN ULONG IoControlCode,
|
|
IN PVOID pInputBuffer OPTIONAL,
|
|
IN ULONG InputBufferLength,
|
|
OUT PVOID pOutputBuffer OPTIONAL,
|
|
IN ULONG OutputBufferLength,
|
|
OUT PULONG pBytesTransferred OPTIONAL
|
|
)
|
|
{
|
|
NTSTATUS status;
|
|
|
|
//
|
|
// Overlapped I/O gets a little more interesting. We'll strive to be
|
|
// compatible with NT's KERNEL32 implementation. See DeviceIoControl()
|
|
// in \\rastaman\ntwin\src\base\client\filehops.c for the gory details.
|
|
//
|
|
|
|
OVERLAPPED_TO_IO_STATUS(pOverlapped)->Status = STATUS_PENDING;
|
|
|
|
status = NtDeviceIoControlFile(
|
|
FileHandle, // FileHandle
|
|
pOverlapped->hEvent, // Event
|
|
NULL, // ApcRoutine
|
|
(ULONG_PTR)pOverlapped->hEvent & 1 // ApcContext
|
|
? NULL : pOverlapped,
|
|
OVERLAPPED_TO_IO_STATUS(pOverlapped), // IoStatusBlock
|
|
IoControlCode, // IoControlCode
|
|
pInputBuffer, // InputBuffer
|
|
InputBufferLength, // InputBufferLength
|
|
pOutputBuffer, // OutputBuffer
|
|
OutputBufferLength // OutputBufferLength
|
|
);
|
|
|
|
//
|
|
// If the call didn't fail or pend and the caller wants the number of
|
|
// bytes transferred, grab the value from the I/O status block &
|
|
// return it.
|
|
//
|
|
|
|
if (!NT_ERROR(status) &&
|
|
status != STATUS_PENDING &&
|
|
pBytesTransferred != NULL)
|
|
{
|
|
*pBytesTransferred =
|
|
(ULONG)OVERLAPPED_TO_IO_STATUS(pOverlapped)->Information;
|
|
}
|
|
|
|
return status;
|
|
|
|
} // SrpOverlappedDeviceControl
|
|
|
|
|
|
/***************************************************************************++
|
|
|
|
Routine Description:
|
|
|
|
Initializes the event object cache.
|
|
|
|
Return Value:
|
|
|
|
ULONG - Completion status.
|
|
|
|
--***************************************************************************/
|
|
ULONG
|
|
SrpInitializeEventCache(
|
|
VOID
|
|
)
|
|
{
|
|
//
|
|
// CODEWORK: MAKE THIS CACHED!
|
|
//
|
|
|
|
return NO_ERROR;
|
|
|
|
} // SrpInitializeEventCache
|
|
|
|
|
|
/***************************************************************************++
|
|
|
|
Routine Description:
|
|
|
|
Terminates the event object cache.
|
|
|
|
Return Value:
|
|
|
|
ULONG - Completion status.
|
|
|
|
--***************************************************************************/
|
|
ULONG
|
|
SrpTerminateEventCache(
|
|
VOID
|
|
)
|
|
{
|
|
//
|
|
// CODEWORK: MAKE THIS CACHED!
|
|
//
|
|
|
|
return NO_ERROR;
|
|
|
|
} // SrpTerminateEventCache
|
|
|
|
|
|
/***************************************************************************++
|
|
|
|
Routine Description:
|
|
|
|
This routine attempts to start UL.SYS.
|
|
|
|
Return Value:
|
|
|
|
BOOLEAN - TRUE if successful, FALSE otherwise.
|
|
|
|
--***************************************************************************/
|
|
BOOLEAN
|
|
SrpTryToStartDriver(
|
|
VOID
|
|
)
|
|
{
|
|
BOOLEAN result;
|
|
SC_HANDLE scHandle;
|
|
SC_HANDLE svcHandle;
|
|
|
|
result = FALSE; // until proven otherwise...
|
|
|
|
//
|
|
// Open the service controller.
|
|
//
|
|
|
|
scHandle = OpenSCManagerW(
|
|
NULL, // lpMachineName
|
|
NULL, // lpDatabaseName
|
|
SC_MANAGER_ALL_ACCESS // dwDesiredAccess
|
|
);
|
|
|
|
if (scHandle != NULL)
|
|
{
|
|
//
|
|
// Try to open the UL service.
|
|
//
|
|
|
|
svcHandle = OpenServiceW(
|
|
scHandle, // hSCManager
|
|
SR_SERVICE_NAME, // lpServiceName
|
|
SERVICE_ALL_ACCESS // dwDesiredAccess
|
|
);
|
|
|
|
if (svcHandle != NULL)
|
|
{
|
|
//
|
|
// Try to start it.
|
|
//
|
|
|
|
if (StartService( svcHandle, 0, NULL))
|
|
{
|
|
result = TRUE;
|
|
}
|
|
|
|
CloseServiceHandle( svcHandle );
|
|
}
|
|
|
|
CloseServiceHandle( scHandle );
|
|
}
|
|
|
|
return result;
|
|
|
|
} // SrpTryToStartDriver
|
|
|
|
|
|
//
|
|
// Private functions.
|
|
//
|
|
|
|
/***************************************************************************++
|
|
|
|
Routine Description:
|
|
|
|
Helper routine for opening a UL.SYS handle.
|
|
|
|
Arguments:
|
|
|
|
pHandle - Receives a handle if successful.
|
|
|
|
DesiredAccess - Supplies the types of access requested to the file.
|
|
|
|
AppPool - Supplies TRUE to open/create an application pool, FALSE
|
|
to open a control channel.
|
|
|
|
pAppPoolName - Optionally supplies the name of the application pool
|
|
to create/open.
|
|
|
|
Options - Supplies zero or more UL_OPTION_* flags.
|
|
|
|
CreateDisposition - Supplies the creation disposition for the new
|
|
object.
|
|
|
|
pSecurityAttributes - Optionally supplies security attributes for
|
|
the newly created application pool. Ignored if opening a
|
|
control channel.
|
|
|
|
Return Value:
|
|
|
|
NTSTATUS - Completion status.
|
|
|
|
--***************************************************************************/
|
|
NTSTATUS
|
|
SrpOpenDriverHelper(
|
|
OUT PHANDLE pHandle,
|
|
IN ACCESS_MASK DesiredAccess,
|
|
IN ULONG Options,
|
|
IN ULONG CreateDisposition,
|
|
IN PSECURITY_ATTRIBUTES pSecurityAttributes OPTIONAL
|
|
)
|
|
{
|
|
NTSTATUS status;
|
|
OBJECT_ATTRIBUTES objectAttributes;
|
|
UNICODE_STRING deviceName;
|
|
IO_STATUS_BLOCK ioStatusBlock;
|
|
ULONG shareAccess;
|
|
ULONG createOptions;
|
|
PFILE_FULL_EA_INFORMATION pEaBuffer;
|
|
PSR_OPEN_PACKET pOpenPacket;
|
|
WCHAR deviceNameBuffer[MAX_PATH];
|
|
UCHAR rawEaBuffer[EA_BUFFER_LENGTH];
|
|
|
|
//
|
|
// Validate the parameters.
|
|
//
|
|
|
|
if ((pHandle == NULL) ||
|
|
(Options & ~SR_OPTION_VALID))
|
|
{
|
|
return STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
//
|
|
// Build the open packet.
|
|
//
|
|
|
|
pEaBuffer = (PFILE_FULL_EA_INFORMATION)rawEaBuffer;
|
|
|
|
pEaBuffer->NextEntryOffset = 0;
|
|
pEaBuffer->Flags = 0;
|
|
pEaBuffer->EaNameLength = SR_OPEN_PACKET_NAME_LENGTH;
|
|
pEaBuffer->EaValueLength = sizeof(*pOpenPacket);
|
|
|
|
RtlCopyMemory(
|
|
pEaBuffer->EaName,
|
|
SR_OPEN_PACKET_NAME,
|
|
SR_OPEN_PACKET_NAME_LENGTH + 1
|
|
);
|
|
|
|
pOpenPacket =
|
|
(PSR_OPEN_PACKET)( pEaBuffer->EaName + pEaBuffer->EaNameLength + 1 );
|
|
|
|
pOpenPacket->MajorVersion = SR_INTERFACE_VERSION_MAJOR;
|
|
pOpenPacket->MinorVersion = SR_INTERFACE_VERSION_MINOR;
|
|
|
|
//
|
|
// Build the device name.
|
|
//
|
|
|
|
//
|
|
// It's a control channel, so just use the appropriate device name.
|
|
//
|
|
|
|
wcscpy( deviceNameBuffer, SR_CONTROL_DEVICE_NAME );
|
|
|
|
//
|
|
// Determine the share access and create options based on the
|
|
// Flags parameter.
|
|
//
|
|
|
|
shareAccess = FILE_SHARE_READ | FILE_SHARE_WRITE;
|
|
createOptions = 0;
|
|
|
|
if ((Options & SR_OPTION_OVERLAPPED) == 0)
|
|
{
|
|
createOptions |= FILE_SYNCHRONOUS_IO_NONALERT;
|
|
}
|
|
|
|
//
|
|
// Build the object attributes.
|
|
//
|
|
|
|
RtlInitUnicodeString( &deviceName, deviceNameBuffer );
|
|
|
|
InitializeObjectAttributes(
|
|
&objectAttributes, // ObjectAttributes
|
|
&deviceName, // ObjectName
|
|
OBJ_CASE_INSENSITIVE, // Attributes
|
|
NULL, // RootDirectory
|
|
NULL // SecurityDescriptor
|
|
);
|
|
|
|
if (pSecurityAttributes != NULL)
|
|
{
|
|
objectAttributes.SecurityDescriptor =
|
|
pSecurityAttributes->lpSecurityDescriptor;
|
|
|
|
if (pSecurityAttributes->bInheritHandle)
|
|
{
|
|
objectAttributes.Attributes |= OBJ_INHERIT;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Open the SR device.
|
|
//
|
|
|
|
status = NtCreateFile(
|
|
pHandle, // FileHandle
|
|
DesiredAccess, // DesiredAccess
|
|
&objectAttributes, // ObjectAttributes
|
|
&ioStatusBlock, // IoStatusBlock
|
|
NULL, // AllocationSize
|
|
0, // FileAttributes
|
|
shareAccess, // ShareAccess
|
|
CreateDisposition, // CreateDisposition
|
|
createOptions, // CreateOptions
|
|
pEaBuffer, // EaBuffer
|
|
EA_BUFFER_LENGTH // EaLength
|
|
);
|
|
|
|
if (!NT_SUCCESS(status))
|
|
{
|
|
*pHandle = NULL;
|
|
}
|
|
|
|
return status;
|
|
|
|
} // SrpOpenDriverHelper
|
|
|
|
|
|
/***************************************************************************++
|
|
|
|
Routine Description:
|
|
|
|
Acquires a short-term event from the global event cache. This event
|
|
object may only be used for pseudo-synchronous I/O.
|
|
|
|
Arguments:
|
|
|
|
pEvent - Receives the event handle.
|
|
|
|
Return Value:
|
|
|
|
NTSTATUS - Completion status.
|
|
|
|
--***************************************************************************/
|
|
NTSTATUS
|
|
SrpAcquireCachedEvent(
|
|
OUT PHANDLE pEvent
|
|
)
|
|
{
|
|
NTSTATUS status;
|
|
|
|
//
|
|
// CODEWORK: MAKE THIS CACHED!
|
|
//
|
|
|
|
status = NtCreateEvent(
|
|
pEvent, // EventHandle
|
|
EVENT_ALL_ACCESS, // DesiredAccess
|
|
NULL, // ObjectAttributes
|
|
SynchronizationEvent, // EventType
|
|
FALSE // InitialState
|
|
);
|
|
|
|
return status;
|
|
|
|
} // SrpAcquireCachedEvent
|
|
|
|
|
|
/***************************************************************************++
|
|
|
|
Routine Description:
|
|
|
|
Releases a cached event acquired via SrpAcquireCachedEvent().
|
|
|
|
Arguments:
|
|
|
|
Event - Supplies the event to release.
|
|
|
|
--***************************************************************************/
|
|
VOID
|
|
SrpReleaseCachedEvent(
|
|
IN HANDLE Event
|
|
)
|
|
{
|
|
NTSTATUS status;
|
|
|
|
//
|
|
// CODEWORK: MAKE THIS CACHED!
|
|
//
|
|
|
|
status = NtClose( Event );
|
|
ASSERT( NT_SUCCESS(status) );
|
|
|
|
} // SrpReleaseCachedEvent
|
|
|