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windows-nt/Source/XPSP1/NT/base/cluster/service/nm/ioctl.c

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/*++
Copyright (c) 1997-1999 Microsoft Corporation
Module Name:
ioctl.c
Abstract:
Node control functions.
Author:
John Vert (jvert) 2-Mar-1997
Revision History:
--*/
#include "nmp.h"
//
// Node Common properties.
//
//
// Read-Write Common Properties.
//
RESUTIL_PROPERTY_ITEM
NmpNodeCommonProperties[] = {
{ CLUSREG_NAME_NODE_DESC, NULL, CLUSPROP_FORMAT_SZ, 0, 0, 0, 0 },
{ CLUSREG_NAME_CLUS_EVTLOG_PROPAGATION, NULL, CLUSPROP_FORMAT_DWORD, 1, 0, 1, 0},
{ NULL, NULL, 0, 0, 0, 0, 0 } };
//
// Read-Only Common Properties.
//
RESUTIL_PROPERTY_ITEM
NmpNodeROCommonProperties[] = {
{ CLUSREG_NAME_NODE_NAME, NULL, CLUSPROP_FORMAT_SZ, 0, 0, 0, RESUTIL_PROPITEM_READ_ONLY },
{ CLUSREG_NAME_NODE_HIGHEST_VERSION, NULL, CLUSPROP_FORMAT_DWORD, 0, 0, 0, RESUTIL_PROPITEM_READ_ONLY },
{ CLUSREG_NAME_NODE_LOWEST_VERSION, NULL, CLUSPROP_FORMAT_DWORD, 0, 0, 0, RESUTIL_PROPITEM_READ_ONLY },
{ CLUSREG_NAME_NODE_MAJOR_VERSION, NULL, CLUSPROP_FORMAT_DWORD, 0, 0, 0, RESUTIL_PROPITEM_READ_ONLY},
{ CLUSREG_NAME_NODE_MINOR_VERSION, NULL, CLUSPROP_FORMAT_DWORD, 0, 0, 0, RESUTIL_PROPITEM_READ_ONLY},
{ CLUSREG_NAME_NODE_BUILD_NUMBER, NULL, CLUSPROP_FORMAT_DWORD, 0, 0, 0, RESUTIL_PROPITEM_READ_ONLY},
{ CLUSREG_NAME_NODE_CSDVERSION, NULL, CLUSPROP_FORMAT_SZ, 0, 0, 0, RESUTIL_PROPITEM_READ_ONLY},
{ NULL, NULL, 0, 0, 0, 0, 0 } };
//
// Cluster registry API function pointers.
//
CLUSTER_REG_APIS
NmpClusterRegApis = {
(PFNCLRTLCREATEKEY) DmRtlCreateKey,
(PFNCLRTLOPENKEY) DmRtlOpenKey,
(PFNCLRTLCLOSEKEY) DmCloseKey,
(PFNCLRTLSETVALUE) DmSetValue,
(PFNCLRTLQUERYVALUE) DmQueryValue,
(PFNCLRTLENUMVALUE) DmEnumValue,
(PFNCLRTLDELETEVALUE) DmDeleteValue,
NULL,
NULL,
NULL
};
//
// Local Functions
//
DWORD
NmpNodeControl(
IN PNM_NODE Node,
IN DWORD ControlCode,
IN PUCHAR InBuffer,
IN DWORD InBufferSize,
OUT PUCHAR OutBuffer,
IN DWORD OutBufferSize,
OUT LPDWORD BytesReturned,
OUT LPDWORD Required
);
DWORD
NmpNodeEnumCommonProperties(
OUT PVOID OutBuffer,
IN DWORD OutBufferSize,
OUT LPDWORD BytesReturned,
OUT LPDWORD Required
);
DWORD
NmpNodeGetCommonProperties(
IN PNM_NODE Node,
IN BOOL ReadOnly,
IN HDMKEY RegistryKey,
OUT PVOID OutBuffer,
IN DWORD OutBufferSize,
OUT LPDWORD BytesReturned,
OUT LPDWORD Required
);
DWORD
NmpNodeValidateCommonProperties(
IN PNM_NODE Node,
IN HDMKEY RegistryKey,
IN PVOID InBuffer,
IN DWORD InBufferSize
);
DWORD
NmpNodeSetCommonProperties(
IN PNM_NODE Node,
IN HDMKEY RegistryKey,
IN PVOID InBuffer,
IN DWORD InBufferSize
);
DWORD
NmpNodeEnumPrivateProperties(
IN PNM_NODE Node,
IN HDMKEY RegistryKey,
OUT PVOID OutBuffer,
IN DWORD OutBufferSize,
OUT LPDWORD BytesReturned,
OUT LPDWORD Required
);
DWORD
NmpNodeGetPrivateProperties(
IN PNM_NODE Node,
IN HDMKEY RegistryKey,
OUT PVOID OutBuffer,
IN DWORD OutBufferSize,
OUT LPDWORD BytesReturned,
OUT LPDWORD Required
);
DWORD
NmpNodeValidatePrivateProperties(
IN PNM_NODE Node,
IN HDMKEY RegistryKey,
IN PVOID InBuffer,
IN DWORD InBufferSize
);
DWORD
NmpNodeSetPrivateProperties(
IN PNM_NODE Node,
IN HDMKEY RegistryKey,
IN PVOID InBuffer,
IN DWORD InBufferSize
);
DWORD
NmpNodeGetFlags(
IN PNM_NODE Node,
IN HDMKEY RegistryKey,
OUT PVOID OutBuffer,
IN DWORD OutBufferSize,
OUT LPDWORD BytesReturned,
OUT LPDWORD Required
);
DWORD
WINAPI
NmNodeControl(
IN PNM_NODE Node,
IN PNM_NODE HostNode OPTIONAL,
IN DWORD ControlCode,
IN PUCHAR InBuffer,
IN DWORD InBufferSize,
OUT PUCHAR OutBuffer,
IN DWORD OutBufferSize,
OUT LPDWORD BytesReturned,
OUT LPDWORD Required
)
/*++
Routine Description:
Provides for arbitrary communication and control between an application
and a specific instance of a node.
Arguments:
Node - Supplies the node to be controlled.
HostNode - Supplies the host node on which the resource control should
be delivered. If this is NULL, the local node is used. Not honored!
ControlCode- Supplies the control code that defines the
structure and action of the resource control.
Values of ControlCode between 0 and 0x10000000 are reserved
for future definition and use by Microsoft. All other values
are available for use by ISVs
InBuffer- Supplies a pointer to the input buffer to be passed
to the resource.
InBufferSize- Supplies the size, in bytes, of the data pointed
to by lpInBuffer..
OutBuffer- Supplies a pointer to the output buffer to be
filled in by the resource..
OutBufferSize- Supplies the size, in bytes, of the available
space pointed to by lpOutBuffer.
BytesReturned - Returns the number of bytes of lpOutBuffer
actually filled in by the resource..
Required - Returns the number of bytes if the OutBuffer is not big
enough.
Return Value:
ERROR_SUCCESS if successful
Win32 error code otherwise
--*/
{
DWORD status;
//
// Cluster service ioctls were designed to have access modes, e.g.
// read-only, read-write, etc. These access modes are not implemented.
// If eventually they are implemented, an access mode check should be
// placed here.
//
if ( CLUSCTL_GET_CONTROL_OBJECT( ControlCode ) != CLUS_OBJECT_NODE ) {
return(ERROR_INVALID_FUNCTION);
}
if (NmpEnterApi(NmStateOnline)) {
status = NmpNodeControl(
Node,
ControlCode,
InBuffer,
InBufferSize,
OutBuffer,
OutBufferSize,
BytesReturned,
Required
);
NmpLeaveApi();
}
else {
status = ERROR_NODE_NOT_AVAILABLE;
ClRtlLogPrint(LOG_NOISE,
"[NM] Not in valid state to process NodeControl request.\n"
);
}
return(status);
} // NmNodeControl
DWORD
NmpNodeControl(
IN PNM_NODE Node,
IN DWORD ControlCode,
IN PUCHAR InBuffer,
IN DWORD InBufferSize,
OUT PUCHAR OutBuffer,
IN DWORD OutBufferSize,
OUT LPDWORD BytesReturned,
OUT LPDWORD Required
)
/*++
Routine Description:
Provides for arbitrary communication and control between an application
and a specific instance of a node.
Arguments:
Node - Supplies the node to be controlled.
ControlCode- Supplies the control code that defines the
structure and action of the node control.
Values of ControlCode between 0 and 0x10000000 are reserved
for future definition and use by Microsoft. All other values
are available for use by ISVs
InBuffer- Supplies a pointer to the input buffer to be passed
to the node.
InBufferSize- Supplies the size, in bytes, of the data pointed
to by lpInBuffer.
OutBuffer- Supplies a pointer to the output buffer to be
filled in by the node.
OutBufferSize- Supplies the size, in bytes, of the available
space pointed to by lpOutBuffer.
BytesReturned - Returns the number of bytes of lpOutBuffer
actually filled in by the node.
Required - Returns the number of bytes if the OutBuffer is not big
enough.
Return Value:
ERROR_SUCCESS if successful
Win32 error code otherwise
--*/
{
DWORD status;
HDMKEY nodeKey;
CLUSPROP_BUFFER_HELPER props;
DWORD bufSize;
nodeKey = DmOpenKey( DmNodesKey,
OmObjectId( Node ),
MAXIMUM_ALLOWED
);
if ( nodeKey == NULL ) {
return(GetLastError());
}
switch ( ControlCode ) {
case CLUSCTL_NODE_UNKNOWN:
*BytesReturned = 0;
status = ERROR_SUCCESS;
break;
case CLUSCTL_NODE_GET_NAME:
if ( OmObjectName( Node ) == NULL ) {
return(ERROR_NOT_READY);
}
props.pb = OutBuffer;
bufSize = (lstrlenW( OmObjectName( Node ) ) + 1) * sizeof(WCHAR);
if ( bufSize > OutBufferSize ) {
*Required = bufSize;
*BytesReturned = 0;
status = ERROR_MORE_DATA;
} else {
lstrcpyW( props.psz, OmObjectName( Node ) );
*BytesReturned = bufSize;
*Required = 0;
status = ERROR_SUCCESS;
}
break;
case CLUSCTL_NODE_GET_ID:
if ( OmObjectId( Node ) == NULL ) {
return(ERROR_NOT_READY);
}
props.pb = OutBuffer;
bufSize = (lstrlenW( OmObjectId( Node ) ) + 1) * sizeof(WCHAR);
if ( bufSize > OutBufferSize ) {
*Required = bufSize;
*BytesReturned = 0;
status = ERROR_MORE_DATA;
} else {
lstrcpyW( props.psz, OmObjectId( Node ) );
*BytesReturned = bufSize;
*Required = 0;
status = ERROR_SUCCESS;
}
break;
case CLUSCTL_NODE_ENUM_COMMON_PROPERTIES:
status = NmpNodeEnumCommonProperties( OutBuffer,
OutBufferSize,
BytesReturned,
Required );
break;
case CLUSCTL_NODE_GET_RO_COMMON_PROPERTIES:
status = NmpNodeGetCommonProperties( Node,
TRUE, // ReadOnly
nodeKey,
OutBuffer,
OutBufferSize,
BytesReturned,
Required );
break;
case CLUSCTL_NODE_GET_COMMON_PROPERTIES:
status = NmpNodeGetCommonProperties( Node,
FALSE, // ReadOnly
nodeKey,
OutBuffer,
OutBufferSize,
BytesReturned,
Required );
break;
case CLUSCTL_NODE_VALIDATE_COMMON_PROPERTIES:
status = NmpNodeValidateCommonProperties( Node,
nodeKey,
InBuffer,
InBufferSize );
break;
case CLUSCTL_NODE_SET_COMMON_PROPERTIES:
status = NmpNodeSetCommonProperties( Node,
nodeKey,
InBuffer,
InBufferSize );
break;
case CLUSCTL_NODE_ENUM_PRIVATE_PROPERTIES:
status = NmpNodeEnumPrivateProperties( Node,
nodeKey,
OutBuffer,
OutBufferSize,
BytesReturned,
Required );
break;
case CLUSCTL_NODE_GET_RO_PRIVATE_PROPERTIES:
if ( OutBufferSize < sizeof(DWORD) ) {
*BytesReturned = 0;
*Required = sizeof(DWORD);
if ( OutBuffer == NULL ) {
status = ERROR_SUCCESS;
} else {
status = ERROR_MORE_DATA;
}
} else {
LPDWORD ptrDword = (LPDWORD) OutBuffer;
*ptrDword = 0;
*BytesReturned = sizeof(DWORD);
status = ERROR_SUCCESS;
}
break;
case CLUSCTL_NODE_GET_PRIVATE_PROPERTIES:
status = NmpNodeGetPrivateProperties( Node,
nodeKey,
OutBuffer,
OutBufferSize,
BytesReturned,
Required );
break;
case CLUSCTL_NODE_VALIDATE_PRIVATE_PROPERTIES:
status = NmpNodeValidatePrivateProperties( Node,
nodeKey,
InBuffer,
InBufferSize );
break;
case CLUSCTL_NODE_SET_PRIVATE_PROPERTIES:
status = NmpNodeSetPrivateProperties( Node,
nodeKey,
InBuffer,
InBufferSize );
break;
case CLUSCTL_NODE_GET_CHARACTERISTICS:
if ( OutBufferSize < sizeof(DWORD) ) {
*BytesReturned = 0;
*Required = sizeof(DWORD);
if ( OutBuffer == NULL ) {
status = ERROR_SUCCESS;
} else {
status = ERROR_MORE_DATA;
}
} else {
*BytesReturned = sizeof(DWORD);
*(LPDWORD)OutBuffer = 0;
status = ERROR_SUCCESS;
}
break;
case CLUSCTL_NODE_GET_FLAGS:
status = NmpNodeGetFlags( Node,
nodeKey,
OutBuffer,
OutBufferSize,
BytesReturned,
Required );
break;
default:
status = ERROR_INVALID_FUNCTION;
break;
}
DmCloseKey( nodeKey );
return(status);
} // NmpNodeControl
DWORD
NmpNodeEnumCommonProperties(
OUT PVOID OutBuffer,
IN DWORD OutBufferSize,
OUT LPDWORD BytesReturned,
OUT LPDWORD Required
)
/*++
Routine Description:
Enumerates the common property names for a given node.
Arguments:
OutBuffer - Supplies the output buffer.
OutBufferSize - Supplies the size of the output buffer.
BytesReturned - The number of bytes returned in OutBuffer.
Required - The required number of bytes if OutBuffer is too small.
Return Value:
ERROR_SUCCESS if successful.
A Win32 error code on failure.
--*/
{
DWORD status;
//
// Get the common properties.
//
status = ClRtlEnumProperties( NmpNodeCommonProperties,
OutBuffer,
OutBufferSize,
BytesReturned,
Required );
return(status);
} // NmpNodeEnumCommonProperties
DWORD
NmpNodeGetCommonProperties(
IN PNM_NODE Node,
IN BOOL ReadOnly,
IN HDMKEY RegistryKey,
OUT PVOID OutBuffer,
IN DWORD OutBufferSize,
OUT LPDWORD BytesReturned,
OUT LPDWORD Required
)
/*++
Routine Description:
Gets the common properties for a given node.
Arguments:
Node - Supplies the node.
ReadOnly - TRUE if the read-only properties should be read. FALSE otherwise.
RegistryKey - Supplies the registry key for this node.
OutBuffer - Supplies the output buffer.
OutBufferSize - Supplies the size of the output buffer.
BytesReturned - The number of bytes returned in OutBuffer.
Required - The required number of bytes if OutBuffer is too small.
Return Value:
ERROR_SUCCESS if successful.
A Win32 error code on failure.
--*/
{
DWORD status;
PRESUTIL_PROPERTY_ITEM propertyTable;
if ( ReadOnly ) {
propertyTable = NmpNodeROCommonProperties;
} else {
propertyTable = NmpNodeCommonProperties;
}
//
// Get the common properties.
//
status = ClRtlGetProperties( RegistryKey,
&NmpClusterRegApis,
propertyTable,
OutBuffer,
OutBufferSize,
BytesReturned,
Required );
return(status);
} // NmpNodeGetCommonProperties
DWORD
NmpNodeValidateCommonProperties(
IN PNM_NODE Node,
IN HDMKEY RegistryKey,
IN PVOID InBuffer,
IN DWORD InBufferSize
)
/*++
Routine Description:
Validates the common properties for a given node.
Arguments:
Node - Supplies the node object.
InBuffer - Supplies the input buffer.
InBufferSize - Supplies the size of the input buffer.
Return Value:
ERROR_SUCCESS if successful.
A Win32 error code on failure.
--*/
{
DWORD status;
//
// Validate the property list.
//
status = ClRtlVerifyPropertyTable( NmpNodeCommonProperties,
NULL, // Reserved
FALSE, // Don't allow unknowns
InBuffer,
InBufferSize,
NULL );
if ( status != ERROR_SUCCESS ) {
ClRtlLogPrint( LOG_CRITICAL,
"[NM] ValidateCommonProperties, error in verify routine.\n");
}
return(status);
} // NmpNodeValidateCommonProperties
DWORD
NmpNodeSetCommonProperties(
IN PNM_NODE Node,
IN HDMKEY RegistryKey,
IN PVOID InBuffer,
IN DWORD InBufferSize
)
/*++
Routine Description:
Sets the common properties for a given node.
Arguments:
Node - Supplies the node object.
InBuffer - Supplies the input buffer.
InBufferSize - Supplies the size of the input buffer.
Return Value:
ERROR_SUCCESS if successful.
A Win32 error code on failure.
--*/
{
DWORD status;
//
// Validate the property list.
//
status = ClRtlVerifyPropertyTable( NmpNodeCommonProperties,
NULL, // Reserved
FALSE, // Don't allow unknowns
InBuffer,
InBufferSize,
NULL );
if ( status == ERROR_SUCCESS ) {
status = ClRtlSetPropertyTable( NULL,
RegistryKey,
&NmpClusterRegApis,
NmpNodeCommonProperties,
NULL, // Reserved
FALSE, // Don't allow unknowns
InBuffer,
InBufferSize,
FALSE, // bForceWrite
NULL );
if ( status != ERROR_SUCCESS ) {
ClRtlLogPrint( LOG_CRITICAL,
"[NM] SetCommonProperties, error in set routine.\n");
}
} else {
ClRtlLogPrint( LOG_CRITICAL,
"[NM] SetCommonProperties, error in verify routine.\n");
}
return(status);
} // NmpNodeSetCommonProperties
DWORD
NmpNodeEnumPrivateProperties(
IN PNM_NODE Node,
IN HDMKEY RegistryKey,
OUT PVOID OutBuffer,
IN DWORD OutBufferSize,
OUT LPDWORD BytesReturned,
OUT LPDWORD Required
)
/*++
Routine Description:
Enumerates the private property names for a given node.
Arguments:
Node - Supplies the node object.
RegistryKey - Registry key for the node.
OutBuffer - Supplies the output buffer.
OutBufferSize - Supplies the size of the output buffer.
BytesReturned - The number of bytes returned in OutBuffer.
Required - The required number of bytes if OutBuffer is too small.
Return Value:
ERROR_SUCCESS if successful.
A Win32 error code on failure.
--*/
{
DWORD status;
HDMKEY parametersKey;
DWORD totalBufferSize = 0;
*BytesReturned = 0;
*Required = 0;
//
// Clear the output buffer
//
ZeroMemory( OutBuffer, OutBufferSize );
//
// Open the cluster node parameters key.
//
parametersKey = DmOpenKey( RegistryKey,
CLUSREG_KEYNAME_PARAMETERS,
MAXIMUM_ALLOWED );
if ( parametersKey == NULL ) {
status = GetLastError();
if ( status == ERROR_FILE_NOT_FOUND ) {
status = ERROR_SUCCESS;
}
return(status);
}
//
// Enum the private properties for the node.
//
status = ClRtlEnumPrivateProperties( parametersKey,
&NmpClusterRegApis,
OutBuffer,
OutBufferSize,
BytesReturned,
Required );
DmCloseKey( parametersKey );
return(status);
} // NmpNodeEnumPrivateProperties
DWORD
NmpNodeGetPrivateProperties(
IN PNM_NODE Node,
IN HDMKEY RegistryKey,
OUT PVOID OutBuffer,
IN DWORD OutBufferSize,
OUT LPDWORD BytesReturned,
OUT LPDWORD Required
)
/*++
Routine Description:
Gets the private properties for a given node.
Arguments:
Node - Supplies the node object.
OutBuffer - Supplies the output buffer.
OutBufferSize - Supplies the size of the output buffer.
BytesReturned - The number of bytes returned in OutBuffer.
Required - The required number of bytes if OutBuffer is too small.
Return Value:
ERROR_SUCCESS if successful.
A Win32 error code on failure.
--*/
{
DWORD status;
HDMKEY parametersKey;
DWORD totalBufferSize = 0;
*BytesReturned = 0;
*Required = 0;
//
// Clear the output buffer
//
ZeroMemory( OutBuffer, OutBufferSize );
//
// Open the cluster node parameters key.
//
parametersKey = DmOpenKey( RegistryKey,
CLUSREG_KEYNAME_PARAMETERS,
MAXIMUM_ALLOWED );
if ( parametersKey == NULL ) {
status = GetLastError();
if ( status == ERROR_FILE_NOT_FOUND ) {
//
// If we don't have a parameters key, then return an
// item count of 0 and an endmark.
//
totalBufferSize = sizeof(DWORD) + sizeof(CLUSPROP_SYNTAX);
if ( OutBufferSize < totalBufferSize ) {
*Required = totalBufferSize;
status = ERROR_MORE_DATA;
} else {
// This is somewhat redundant since we zero the
// buffer above, but it's here for clarity.
CLUSPROP_BUFFER_HELPER buf;
buf.pb = OutBuffer;
buf.pList->nPropertyCount = 0;
buf.pdw++;
buf.pSyntax->dw = CLUSPROP_SYNTAX_ENDMARK;
*BytesReturned = totalBufferSize;
status = ERROR_SUCCESS;
}
}
return(status);
}
//
// Get private properties for the node.
//
status = ClRtlGetPrivateProperties( parametersKey,
&NmpClusterRegApis,
OutBuffer,
OutBufferSize,
BytesReturned,
Required );
DmCloseKey( parametersKey );
return(status);
} // NmpNodeGetPrivateProperties
DWORD
NmpNodeValidatePrivateProperties(
IN PNM_NODE Node,
IN HDMKEY RegistryKey,
IN PVOID InBuffer,
IN DWORD InBufferSize
)
/*++
Routine Description:
Validates the private properties for a given node.
Arguments:
Node - Supplies the node object.
RegistryKey - Registry key for the node.
InBuffer - Supplies the input buffer.
InBufferSize - Supplies the size of the input buffer.
Return Value:
ERROR_SUCCESS if successful.
A Win32 error code on failure.
--*/
{
DWORD status;
//
// Validate the property list.
//
status = ClRtlVerifyPrivatePropertyList( InBuffer,
InBufferSize );
return(status);
} // NmpNodeValidatePrivateProperties
DWORD
NmpNodeSetPrivateProperties(
IN PNM_NODE Node,
IN HDMKEY RegistryKey,
IN PVOID InBuffer,
IN DWORD InBufferSize
)
/*++
Routine Description:
Sets the private properties for a given node.
Arguments:
Node - Supplies the node object.
RegistryKey - Registry key for the node.
InBuffer - Supplies the input buffer.
InBufferSize - Supplies the size of the input buffer.
Return Value:
ERROR_SUCCESS if successful.
A Win32 error code on failure.
--*/
{
DWORD status;
HDMKEY parametersKey;
DWORD disposition;
//
// Validate the property list.
//
status = ClRtlVerifyPrivatePropertyList( InBuffer,
InBufferSize );
if ( status == ERROR_SUCCESS ) {
//
// Open the cluster node\xx\parameters key
//
parametersKey = DmOpenKey( RegistryKey,
CLUSREG_KEYNAME_PARAMETERS,
MAXIMUM_ALLOWED );
if ( parametersKey == NULL ) {
status = GetLastError();
if ( status == ERROR_FILE_NOT_FOUND ) {
//
// Try to create the parameters key.
//
parametersKey = DmCreateKey( RegistryKey,
CLUSREG_KEYNAME_PARAMETERS,
0,
KEY_READ | KEY_WRITE,
NULL,
&disposition );
if ( parametersKey == NULL ) {
status = GetLastError();
return(status);
}
}
}
status = ClRtlSetPrivatePropertyList( NULL, // IN HANDLE hXsaction
parametersKey,
&NmpClusterRegApis,
InBuffer,
InBufferSize );
DmCloseKey( parametersKey );
}
return(status);
} // NmpNodeSetPrivateProperties
DWORD
NmpNodeGetFlags(
IN PNM_NODE Node,
IN HDMKEY RegistryKey,
OUT PVOID OutBuffer,
IN DWORD OutBufferSize,
OUT LPDWORD BytesReturned,
OUT LPDWORD Required
)
/*++
Routine Description:
Gets the flags for a given node.
Arguments:
Node - Supplies the node.
RegistryKey - Registry key for the node.
OutBuffer - Supplies the output buffer.
OutBufferSize - Supplies the size of the output buffer.
BytesReturned - The number of bytes returned in OutBuffer.
Required - The required number of bytes if OutBuffer is too small.
Return Value:
ERROR_SUCCESS if successful.
A Win32 error code on failure.
--*/
{
DWORD status;
*BytesReturned = 0;
if ( OutBufferSize < sizeof(DWORD) ) {
*Required = sizeof(DWORD);
if ( OutBuffer == NULL ) {
status = ERROR_SUCCESS;
} else {
status = ERROR_MORE_DATA;
}
} else {
DWORD valueType;
//
// Read the Flags value for the node.
//
*BytesReturned = OutBufferSize;
status = DmQueryValue( RegistryKey,
CLUSREG_NAME_FLAGS,
&valueType,
OutBuffer,
BytesReturned );
if ( status == ERROR_FILE_NOT_FOUND ) {
*BytesReturned = sizeof(DWORD);
*(LPDWORD)OutBuffer = 0;
status = ERROR_SUCCESS;
}
}
return(status);
} // NmpNodeGetFlags
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