BOOLEAN
Ext2QueryRegistrySettings(IN PUNICODE_STRING RegistryPath)
{
UNICODE_STRING ParameterPath;
UNICODE_STRING UniName;
ANSI_STRING AnsiName;
ULONG WritingSupport = 0;
ULONG CheckingBitmap = 0;
ULONG Ext3ForceWriting = 0;
ULONG AutoMount = 0;
WCHAR UniBuffer[CODEPAGE_MAXLEN];
USHORT Buffer[HIDINGPAT_LEN];
NTSTATUS Status;
ParameterPath.Length = 0;
ParameterPath.MaximumLength =
RegistryPath->Length + sizeof(PARAMETERS_KEY) + sizeof(WCHAR);
ParameterPath.Buffer =
(PWSTR) Ext2AllocatePool(
PagedPool,
ParameterPath.MaximumLength,
'LG2E'
);
if (!ParameterPath.Buffer) {
DbgBreak();
DEBUG(DL_ERR, ( "Ex2QueryParameters: failed to allocate Parameters...\n"));
return FALSE;
}
RtlCopyUnicodeString(&ParameterPath, RegistryPath);
RtlAppendUnicodeToString(&ParameterPath, PARAMETERS_KEY);
/* enable automount of ext2/3/4 volumes */
SetLongFlag(Ext2Global->Flags, EXT2_AUTO_MOUNT);
/* query parameter settings from registry */
Ext2QueryGlobalParameters(&ParameterPath);
/* set global codepage settings */
if (wcslen(&Ext2Global->Codepage.PageName[0])) {
UniName.Length = sizeof(WCHAR) * wcslen(&Ext2Global->Codepage.PageName[0]);
UniName.MaximumLength = CODEPAGE_MAXLEN * sizeof(WCHAR);
UniName.Buffer = &Ext2Global->Codepage.PageName[0];
AnsiName.MaximumLength = CODEPAGE_MAXLEN;
AnsiName.Length = 0;
AnsiName.Buffer = &Ext2Global->Codepage.AnsiName[0];
Status = RtlUnicodeStringToAnsiString(
&AnsiName,
&UniName,
FALSE);
if (!NT_SUCCESS(Status)) {
DEBUG(DL_ERR, ( "Ext2QueryParameters: Wrong CodePage %wZ ...\n", &UniName));
RtlCopyMemory(&(Ext2Global->Codepage.AnsiName[0]),"default\0", 8);
}
} else {
DEBUG(DL_ERR, ( "Ext2QueryParameters: CodePage not specified.\n"));
RtlCopyMemory(&(Ext2Global->Codepage.AnsiName[0]),"default\0", 8);
}
Ext2Global->Codepage.AnsiName[CODEPAGE_MAXLEN - 1] = 0;
/* set global hidden prefix pattern */
if (wcslen(&Ext2Global->wHidingPrefix[0])) {
UniName.Length = sizeof(WCHAR) * wcslen(&Ext2Global->wHidingPrefix[0]);
UniName.MaximumLength = HIDINGPAT_LEN * sizeof(WCHAR);
UniName.Buffer = &Ext2Global->wHidingPrefix[0];
AnsiName.MaximumLength = HIDINGPAT_LEN;
AnsiName.Length = 0;
AnsiName.Buffer = &(Ext2Global->sHidingPrefix[0]);
Status = RtlUnicodeStringToAnsiString(
&AnsiName,
&UniName,
FALSE);
if (NT_SUCCESS(Status)) {
Ext2Global->bHidingPrefix = TRUE;
} else {
DEBUG(DL_ERR, ( "Ext2QueryParameters: Wrong HidingPrefix ...\n"));
}
} else {
DEBUG(DL_ERR, ( "Ext2QueryParameters: HidingPrefix not specified.\n"));
}
Ext2Global->sHidingPrefix[HIDINGPAT_LEN - 1] = 0;
/* set global hidden suffix pattern */
if (wcslen(&Ext2Global->wHidingSuffix[0])) {
UniName.Length = sizeof(WCHAR) * wcslen(&Ext2Global->wHidingSuffix[0]);
UniName.MaximumLength = HIDINGPAT_LEN * sizeof(WCHAR);
UniName.Buffer = &Ext2Global->wHidingSuffix[0];
AnsiName.MaximumLength = HIDINGPAT_LEN;
AnsiName.Length = 0;
AnsiName.Buffer = &(Ext2Global->sHidingSuffix[0]);
Status = RtlUnicodeStringToAnsiString(
&AnsiName,
&UniName,
FALSE);
if (NT_SUCCESS(Status)) {
Ext2Global->bHidingSuffix = TRUE;
} else {
DEBUG(DL_ERR, ( "Ext2QueryParameters: Wrong HidingSuffix ...\n"));
}
} else {
DEBUG(DL_ERR, ( "Ext2QueryParameters: HidingSuffix not specified.\n"));
}
Ext2Global->sHidingPrefix[HIDINGPAT_LEN - 1] = 0;
Ext2Global->RegistryPath.Buffer = ParameterPath.Buffer;
Ext2Global->RegistryPath.Length = 0;
Ext2Global->RegistryPath.MaximumLength = ParameterPath.MaximumLength;
RtlCopyUnicodeString(&Ext2Global->RegistryPath, RegistryPath);
RtlAppendUnicodeToString(&Ext2Global->RegistryPath, VOLUMES_KEY);
return TRUE;
}
/*
* NAME: DriverEntry
* FUNCTION: Called by the system to initalize the driver
*
* ARGUMENTS:
* DriverObject = object describing this driver
* RegistryPath = path to our configuration entries
* RETURNS: Success or failure
*/
NTSTATUS
DriverEntry (
IN PDRIVER_OBJECT DriverObject,
IN PUNICODE_STRING RegistryPath
)
{
PDEVICE_OBJECT DiskdevObject = NULL;
PDEVICE_OBJECT CdromdevObject = NULL;
UNICODE_STRING DeviceName;
UNICODE_STRING DosDeviceName;
PFAST_IO_DISPATCH FastIoDispatch;
PCACHE_MANAGER_CALLBACKS CacheManagerCallbacks;
LARGE_INTEGER Timeout;
NTSTATUS Status;
int rc = 0;
BOOLEAN linux_lib_inited = FALSE;
BOOLEAN journal_module_inited = FALSE;
/* Verify ERESOURCE alignment in structures */
ASSERT((FIELD_OFFSET(EXT2_GLOBAL, Resource) & 7) == 0);
ASSERT((FIELD_OFFSET(EXT2_VCB, MainResource) & 7) == 0);
ASSERT((FIELD_OFFSET(EXT2_VCB, PagingIoResource) & 7) == 0);
ASSERT((FIELD_OFFSET(EXT2_VCB, MetaLock) & 7) == 0);
ASSERT((FIELD_OFFSET(EXT2_VCB, McbLock) & 7) == 0);
ASSERT((FIELD_OFFSET(EXT2_FCBVCB, MainResource) & 7) == 0);
ASSERT((FIELD_OFFSET(EXT2_FCBVCB, PagingIoResource) & 7) == 0);
ASSERT((FIELD_OFFSET(EXT2_FCB, MainResource) & 7) == 0);
ASSERT((FIELD_OFFSET(EXT2_FCB, PagingIoResource) & 7) == 0);
/* Verity super block ... */
ASSERT(sizeof(EXT2_SUPER_BLOCK) == 1024);
ASSERT(FIELD_OFFSET(EXT2_SUPER_BLOCK, s_magic) == 56);
DbgPrint(
"Ext2Fsd --"
#ifdef _WIN2K_TARGET_
" Win2k --"
#endif
" Version "
EXT2FSD_VERSION
#if EXT2_DEBUG
" Checked"
#else
" Free"
#endif
" -- "
__DATE__ " "
__TIME__ ".\n");
DEBUG(DL_FUN, ( "Ext2 DriverEntry ...\n"));
/* initialize winlib structures */
if (ext2_init_linux()) {
Status = STATUS_INSUFFICIENT_RESOURCES;
goto errorout;
}
linux_lib_inited = TRUE;
/* initialize journal module structures */
LOAD_MODULE(journal_init);
if (rc != 0) {
Status = STATUS_INSUFFICIENT_RESOURCES;
goto errorout;
}
journal_module_inited = TRUE;
/* allocate memory for Ext2Global */
Ext2Global = Ext2AllocatePool(NonPagedPool, sizeof(EXT2_GLOBAL), 'LG2E');
if (!Ext2Global) {
Status = STATUS_INSUFFICIENT_RESOURCES;
goto errorout;
}
/* initialize Ext2Global */
RtlZeroMemory(Ext2Global, sizeof(EXT2_GLOBAL));
Ext2Global->Identifier.Type = EXT2FGD;
Ext2Global->Identifier.Size = sizeof(EXT2_GLOBAL);
InitializeListHead(&(Ext2Global->VcbList));
ExInitializeResourceLite(&(Ext2Global->Resource));
/* Reaper thread engine event */
KeInitializeEvent(&Ext2Global->Reaper.Engine,
SynchronizationEvent, FALSE);
/* query registry settings */
Ext2QueryGlobalParameters(RegistryPath);
/* create Ext2Fsd cdrom fs deivce */
RtlInitUnicodeString(&DeviceName, CDROM_NAME);
Status = IoCreateDevice(
DriverObject,
0,
&DeviceName,
FILE_DEVICE_CD_ROM_FILE_SYSTEM,
0,
FALSE,
&CdromdevObject );
if (!NT_SUCCESS(Status)) {
DEBUG(DL_ERR, ( "IoCreateDevice cdrom device object error.\n"));
goto errorout;
}
/* create Ext2Fsd disk fs deivce */
RtlInitUnicodeString(&DeviceName, DEVICE_NAME);
Status = IoCreateDevice(
DriverObject,
0,
&DeviceName,
FILE_DEVICE_DISK_FILE_SYSTEM,
0,
FALSE,
&DiskdevObject );
if (!NT_SUCCESS(Status)) {
DEBUG(DL_ERR, ( "IoCreateDevice disk device object error.\n"));
goto errorout;
}
/* start resource reaper thread */
Status= Ext2StartReaperThread();
if (!NT_SUCCESS(Status)) {
goto errorout;
}
/* make sure Reaperthread is started */
Timeout.QuadPart = (LONGLONG)-10*1000*1000*10; /* 10 seconds */
Status = KeWaitForSingleObject(
&(Ext2Global->Reaper.Engine),
Executive,
KernelMode,
FALSE,
&Timeout
);
if (Status != STATUS_SUCCESS) {
Status = STATUS_INSUFFICIENT_RESOURCES;
goto errorout;
}
/* initializing */
Ext2Global->DiskdevObject = DiskdevObject;
Ext2Global->CdromdevObject = CdromdevObject;
DriverObject->MajorFunction[IRP_MJ_CREATE] = Ext2BuildRequest;
DriverObject->MajorFunction[IRP_MJ_CLOSE] = Ext2BuildRequest;
DriverObject->MajorFunction[IRP_MJ_READ] = Ext2BuildRequest;
DriverObject->MajorFunction[IRP_MJ_WRITE] = Ext2BuildRequest;
DriverObject->MajorFunction[IRP_MJ_FLUSH_BUFFERS] = Ext2BuildRequest;
DriverObject->MajorFunction[IRP_MJ_SHUTDOWN] = Ext2BuildRequest;
DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION] = Ext2BuildRequest;
DriverObject->MajorFunction[IRP_MJ_SET_INFORMATION] = Ext2BuildRequest;
DriverObject->MajorFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] = Ext2BuildRequest;
DriverObject->MajorFunction[IRP_MJ_SET_VOLUME_INFORMATION] = Ext2BuildRequest;
DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] = Ext2BuildRequest;
DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] = Ext2BuildRequest;
DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = Ext2BuildRequest;
DriverObject->MajorFunction[IRP_MJ_LOCK_CONTROL] = Ext2BuildRequest;
DriverObject->MajorFunction[IRP_MJ_CLEANUP] = Ext2BuildRequest;
#if (_WIN32_WINNT >= 0x0500)
DriverObject->MajorFunction[IRP_MJ_PNP] = Ext2BuildRequest;
#endif //(_WIN32_WINNT >= 0x0500)
#if EXT2_UNLOAD
DriverObject->DriverUnload = DriverUnload;
#else
DriverObject->DriverUnload = NULL;
#endif
//
// Initialize the fast I/O entry points
//
FastIoDispatch = &(Ext2Global->FastIoDispatch);
FastIoDispatch->SizeOfFastIoDispatch = sizeof(FAST_IO_DISPATCH);
FastIoDispatch->FastIoCheckIfPossible = Ext2FastIoCheckIfPossible;
FastIoDispatch->FastIoRead = Ext2FastIoRead;
FastIoDispatch->FastIoWrite = Ext2FastIoWrite;
FastIoDispatch->FastIoQueryBasicInfo = Ext2FastIoQueryBasicInfo;
FastIoDispatch->FastIoQueryStandardInfo = Ext2FastIoQueryStandardInfo;
FastIoDispatch->FastIoLock = Ext2FastIoLock;
FastIoDispatch->FastIoUnlockSingle = Ext2FastIoUnlockSingle;
FastIoDispatch->FastIoUnlockAll = Ext2FastIoUnlockAll;
FastIoDispatch->FastIoUnlockAllByKey = Ext2FastIoUnlockAllByKey;
FastIoDispatch->FastIoQueryNetworkOpenInfo = Ext2FastIoQueryNetworkOpenInfo;
FastIoDispatch->AcquireForModWrite = Ext2AcquireFileForModWrite;
FastIoDispatch->ReleaseForModWrite = Ext2ReleaseFileForModWrite;
FastIoDispatch->AcquireForCcFlush = Ext2AcquireFileForCcFlush;
FastIoDispatch->ReleaseForCcFlush = Ext2ReleaseFileForCcFlush;
FastIoDispatch->AcquireFileForNtCreateSection = Ext2AcquireForCreateSection;
FastIoDispatch->ReleaseFileForNtCreateSection = Ext2ReleaseForCreateSection;
DriverObject->FastIoDispatch = FastIoDispatch;
//
// initializing structure sizes for statistics
// 1 means flexible/not fixed for all allocations (for different volumes).
//
Ext2Global->PerfStat.Magic = EXT2_PERF_STAT_MAGIC;
Ext2Global->PerfStat.Version = EXT2_PERF_STAT_VER2;
Ext2Global->PerfStat.Length = sizeof(EXT2_PERF_STATISTICS_V2);
Ext2Global->PerfStat.Unit.Slot[PS_IRP_CONTEXT] = sizeof(EXT2_IRP_CONTEXT); /* 0 */
Ext2Global->PerfStat.Unit.Slot[PS_VCB] = sizeof(EXT2_VCB); /* 1 */
Ext2Global->PerfStat.Unit.Slot[PS_FCB] = sizeof(EXT2_FCB); /* 2 */
Ext2Global->PerfStat.Unit.Slot[PS_CCB] = sizeof(EXT2_CCB); /* 3 */
Ext2Global->PerfStat.Unit.Slot[PS_MCB] = sizeof(EXT2_MCB); /* 4 */
Ext2Global->PerfStat.Unit.Slot[PS_EXTENT] = sizeof(EXT2_EXTENT); /* 5 */
Ext2Global->PerfStat.Unit.Slot[PS_RW_CONTEXT] = sizeof(EXT2_RW_CONTEXT); /* 6 */
Ext2Global->PerfStat.Unit.Slot[PS_VPB] = sizeof(VPB); /* 7 */
Ext2Global->PerfStat.Unit.Slot[PS_FILE_NAME] = 1; /* 8 */
Ext2Global->PerfStat.Unit.Slot[PS_MCB_NAME] = 1; /* 9 */
Ext2Global->PerfStat.Unit.Slot[PS_INODE_NAME] = 1; /* a */
Ext2Global->PerfStat.Unit.Slot[PS_DIR_ENTRY] = sizeof(EXT2_DIR_ENTRY2); /* b */
Ext2Global->PerfStat.Unit.Slot[PS_DIR_PATTERN] = 1; /* c */
Ext2Global->PerfStat.Unit.Slot[PS_DISK_EVENT] = sizeof(KEVENT); /* d */
Ext2Global->PerfStat.Unit.Slot[PS_DISK_BUFFER] = 1; /* e */
Ext2Global->PerfStat.Unit.Slot[PS_BLOCK_DATA] = 1; /* f */
Ext2Global->PerfStat.Unit.Slot[PS_EXT2_INODE] = 1; /* 10 */
Ext2Global->PerfStat.Unit.Slot[PS_DENTRY] = sizeof(struct dentry); /* 11 */
Ext2Global->PerfStat.Unit.Slot[PS_BUFF_HEAD] = sizeof(struct buffer_head); /* 12 */
switch ( MmQuerySystemSize() ) {
case MmSmallSystem:
Ext2Global->MaxDepth = 64;
break;
case MmMediumSystem:
Ext2Global->MaxDepth = 128;
break;
case MmLargeSystem:
Ext2Global->MaxDepth = 256;
break;
}
//
// Initialize the Cache Manager callbacks
//
CacheManagerCallbacks = &(Ext2Global->CacheManagerCallbacks);
CacheManagerCallbacks->AcquireForLazyWrite = Ext2AcquireForLazyWrite;
CacheManagerCallbacks->ReleaseFromLazyWrite = Ext2ReleaseFromLazyWrite;
CacheManagerCallbacks->AcquireForReadAhead = Ext2AcquireForReadAhead;
CacheManagerCallbacks->ReleaseFromReadAhead = Ext2ReleaseFromReadAhead;
Ext2Global->CacheManagerNoOpCallbacks.AcquireForLazyWrite = Ext2NoOpAcquire;
Ext2Global->CacheManagerNoOpCallbacks.ReleaseFromLazyWrite = Ext2NoOpRelease;
Ext2Global->CacheManagerNoOpCallbacks.AcquireForReadAhead = Ext2NoOpAcquire;
Ext2Global->CacheManagerNoOpCallbacks.ReleaseFromReadAhead = Ext2NoOpRelease;
//
// Initialize the global data
//
ExInitializeNPagedLookasideList( &(Ext2Global->Ext2IrpContextLookasideList),
NULL,
NULL,
0,
sizeof(EXT2_IRP_CONTEXT),
'PRIE',
0 );
ExInitializeNPagedLookasideList( &(Ext2Global->Ext2FcbLookasideList),
NULL,
NULL,
0,
sizeof(EXT2_FCB),
'BCFE',
0 );
ExInitializeNPagedLookasideList( &(Ext2Global->Ext2CcbLookasideList),
NULL,
NULL,
0,
sizeof(EXT2_CCB),
'BCCE',
0 );
ExInitializeNPagedLookasideList( &(Ext2Global->Ext2McbLookasideList),
NULL,
NULL,
0,
sizeof(EXT2_MCB),
'BCME',
0 );
ExInitializeNPagedLookasideList( &(Ext2Global->Ext2ExtLookasideList),
NULL,
NULL,
0,
sizeof(EXT2_EXTENT),
'STXE',
0 );
ExInitializeNPagedLookasideList( &(Ext2Global->Ext2DentryLookasideList),
NULL,
NULL,
0,
sizeof(struct dentry),
'TNED',
0 );
RtlInitUnicodeString(&DosDeviceName, DOS_DEVICE_NAME);
IoCreateSymbolicLink(&DosDeviceName, &DeviceName);
#if EXT2_DEBUG
ProcessNameOffset = Ext2GetProcessNameOffset();
#endif
Ext2LoadAllNls();
Ext2Global->Codepage.PageTable =
load_nls(Ext2Global->Codepage.AnsiName);
/* register file system devices for disk and cdrom */
IoRegisterFileSystem(DiskdevObject);
ObReferenceObject(DiskdevObject);
IoRegisterFileSystem(CdromdevObject);
ObReferenceObject(CdromdevObject);
errorout:
if (!NT_SUCCESS(Status)) {
/*
* stop reaper thread ...
*/
/*
* cleanup resources ...
*/
if (Ext2Global) {
ExDeleteResourceLite(&Ext2Global->Resource);
Ext2FreePool(Ext2Global, 'LG2E');
}
if (CdromdevObject) {
IoDeleteDevice(CdromdevObject);
}
if (DiskdevObject) {
IoDeleteDevice(DiskdevObject);
}
if (journal_module_inited) {
/* cleanup journal related caches */
UNLOAD_MODULE(journal_exit);
}
if (linux_lib_inited) {
/* cleanup linux lib */
ext2_destroy_linux();
}
}
return Status;
}