VALUE_SEARCH_RETURN_TYPE
NTAPI
CmpGetValueDataFromCache(IN PCM_KEY_CONTROL_BLOCK Kcb,
IN PCM_CACHED_VALUE *CachedValue,
IN PCELL_DATA ValueKey,
IN BOOLEAN ValueIsCached,
OUT PVOID *DataPointer,
OUT PBOOLEAN Allocated,
OUT PHCELL_INDEX CellToRelease)
{
PHHIVE Hive;
ULONG Length;
/* Sanity checks */
ASSERT(MAXIMUM_CACHED_DATA < CM_KEY_VALUE_BIG);
ASSERT((ValueKey->u.KeyValue.DataLength & CM_KEY_VALUE_SPECIAL_SIZE) == 0);
/* Set defaults */
*DataPointer = NULL;
*Allocated = FALSE;
*CellToRelease = HCELL_NIL;
/* Get the hive */
Hive = Kcb->KeyHive;
/* Check it the value is cached */
if (ValueIsCached)
{
/* This isn't expected! */
ASSERT_VALUE_CACHE();
}
else
{
/* It's not, get the value data using the typical routine */
if (!CmpGetValueData(Hive,
&ValueKey->u.KeyValue,
&Length,
DataPointer,
Allocated,
CellToRelease))
{
/* Nothing found: make sure no data was allocated */
ASSERT(*Allocated == FALSE);
ASSERT(*DataPointer == NULL);
return SearchFail;
}
}
/* We found the actual data, return success */
return SearchSuccess;
}
VOID
CmGetSystemControlValues(
__in PVOID SystemHiveBuffer,
__inout PCM_SYSTEM_CONTROL_VECTOR ControlVector
)
/*++
Routine Description:
Look for registry values in current control set, as specified
by entries in ControlVector. Report data for value entries
(if any) to variables ControlVector points to.
Arguments:
SystemHiveBuffer - pointer to flat image of the system hive
ControlVector - pointer to structure that describes what values
to pull out and store
Return Value:
NONE.
--*/
{
NTSTATUS status;
PHHIVE SystemHive;
HCELL_INDEX RootCell;
HCELL_INDEX BaseCell;
UNICODE_STRING Name;
HCELL_INDEX KeyCell;
HCELL_INDEX ValueCell;
PCM_KEY_VALUE ValueBody;
ULONG Length;
BOOLEAN AutoSelect;
BOOLEAN small;
ULONG tmplength;
PCM_KEY_NODE Node;
//
// set up to read flat system hive image loader passes us
//
RtlZeroMemory((PVOID)&CmControlHive, sizeof(CmControlHive));
SystemHive = &(CmControlHive.Hive);
CmpInitHiveViewList((PCMHIVE)SystemHive);
CmpInitSecurityCache((PCMHIVE)SystemHive);
status = HvInitializeHive(
SystemHive,
HINIT_FLAT,
HIVE_VOLATILE,
HFILE_TYPE_PRIMARY,
SystemHiveBuffer,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
1,
NULL
);
if (!NT_SUCCESS(status)) {
CM_BUGCHECK(BAD_SYSTEM_CONFIG_INFO,BAD_SYSTEM_CONTROL_VALUES,1,SystemHive,status);
}
//
// don't bother locking/releasing cells
//
ASSERT( SystemHive->ReleaseCellRoutine == NULL );
//
// get hive.cell of root of current control set
//
RootCell = ((PHBASE_BLOCK)SystemHiveBuffer)->RootCell;
RtlInitUnicodeString(&Name, L"current");
BaseCell = CmpFindControlSet(
SystemHive,
RootCell,
&Name,
&AutoSelect
);
if (BaseCell == HCELL_NIL) {
CM_BUGCHECK(BAD_SYSTEM_CONFIG_INFO,BAD_SYSTEM_CONTROL_VALUES,2,SystemHive,&Name);
}
Node = (PCM_KEY_NODE)HvGetCell(SystemHive,BaseCell);
if( Node == NULL ) {
//
// we couldn't map a view for the bin containing this cell
//
return;
}
RtlInitUnicodeString(&Name, L"control");
BaseCell = CmpFindSubKeyByName(SystemHive,
Node,
&Name);
if (BaseCell == HCELL_NIL) {
CM_BUGCHECK(BAD_SYSTEM_CONFIG_INFO,BAD_SYSTEM_CONTROL_VALUES,3,Node,&Name);
}
//
// SystemHive.BaseCell = \registry\machine\system\currentcontrolset\control
//
//
// step through vector, trying to fetch each value
//
while (ControlVector->KeyPath != NULL) {
//
// Assume we will fail to find the key or value.
//
Length = (ULONG)-1;
KeyCell = CmpWalkPath(SystemHive, BaseCell, ControlVector->KeyPath);
if (KeyCell != HCELL_NIL) {
//
// found the key, look for the value entry
//
Node = (PCM_KEY_NODE)HvGetCell(SystemHive,KeyCell);
if( Node == NULL ) {
//
// we couldn't map a view for the bin containing this cell
//
return;
}
RtlInitUnicodeString(&Name, ControlVector->ValueName);
ValueCell = CmpFindValueByName(SystemHive,
Node,
&Name);
if (ValueCell != HCELL_NIL) {
//
// SystemHive.ValueCell is value entry body
//
if (ControlVector->BufferLength == NULL) {
tmplength = sizeof(ULONG);
} else {
tmplength = *(ControlVector->BufferLength);
}
ValueBody = (PCM_KEY_VALUE)HvGetCell(SystemHive, ValueCell);
if( ValueBody == NULL ) {
//
// we couldn't map a view for the bin containing this cell
//
return;
}
small = CmpIsHKeyValueSmall(Length, ValueBody->DataLength);
if (tmplength < Length) {
Length = tmplength;
}
if (Length > 0) {
PCELL_DATA Buffer;
BOOLEAN BufferAllocated;
ULONG realsize;
HCELL_INDEX CellToRelease;
ASSERT((small ? (Length <= CM_KEY_VALUE_SMALL) : TRUE));
//
// get the data from source, regardless of the size
//
if( CmpGetValueData(SystemHive,ValueBody,&realsize,&Buffer,&BufferAllocated,&CellToRelease) == FALSE ) {
//
// insufficient resources; return NULL
//
ASSERT( BufferAllocated == FALSE );
ASSERT( Buffer == NULL );
return;
}
RtlCopyMemory(
ControlVector->Buffer,
Buffer,
Length
);
//
// cleanup the temporary buffer
//
if( BufferAllocated == TRUE ) {
ExFreePool( Buffer );
}
if( CellToRelease != HCELL_NIL ) {
HvReleaseCell(SystemHive,CellToRelease);
}
}
if (ControlVector->Type != NULL) {
*(ControlVector->Type) = ValueBody->Type;
}
}
}
//
// Stash the length of result (-1 if nothing was found)
//
if (ControlVector->BufferLength != NULL) {
*(ControlVector->BufferLength) = Length;
}
ControlVector++;
}
//
// Get the default locale ID for the system from the registry.
//
if (CmDefaultLanguageIdType == REG_SZ) {
PsDefaultSystemLocaleId = (LCID) CmpConvertLangId(
CmDefaultLanguageId,
CmDefaultLanguageIdLength);
} else {
PsDefaultSystemLocaleId = 0x00000409;
}
//
// Get the install (native UI) language ID for the system from the registry.
//
if (CmInstallUILanguageIdType == REG_SZ) {
PsInstallUILanguageId = CmpConvertLangId(
CmInstallUILanguageId,
CmInstallUILanguageIdLength);
} else {
PsInstallUILanguageId = LANGIDFROMLCID(PsDefaultSystemLocaleId);
}
//
// Set the default thread locale to the default system locale
// for now. This will get changed as soon as somebody logs in.
// Use the install (native) language id as our default UI language id.
// This also will get changed as soon as somebody logs in.
//
PsDefaultThreadLocaleId = PsDefaultSystemLocaleId;
PsDefaultUILanguageId = PsInstallUILanguageId;
}
