VOID
NtfsInitializeNtfsData (
IN PDRIVER_OBJECT DriverObject
)
/*++
Routine Description:
This routine initializes the global ntfs data record
Arguments:
DriverObject - Supplies the driver object for NTFS
Return Value:
None.
--*/
{
USHORT FileLockMaxDepth;
USHORT IoContextMaxDepth;
USHORT IrpContextMaxDepth;
USHORT KeventMaxDepth;
USHORT ScbNonpagedMaxDepth;
USHORT ScbSnapshotMaxDepth;
USHORT CcbDataMaxDepth;
USHORT CcbMaxDepth;
USHORT DeallocatedRecordsMaxDepth;
USHORT FcbDataMaxDepth;
USHORT FcbIndexMaxDepth;
USHORT IndexContextMaxDepth;
USHORT LcbMaxDepth;
USHORT NukemMaxDepth;
USHORT ScbDataMaxDepth;
PSECURITY_SUBJECT_CONTEXT SubjectContext = NULL;
BOOLEAN CapturedSubjectContext = FALSE;
PACL SystemDacl = NULL;
ULONG SystemDaclLength;
PSID AdminSid = NULL;
PSID SystemSid = NULL;
NTSTATUS Status = STATUS_SUCCESS;
PAGED_CODE();
DebugTrace( +1, Dbg, ("NtfsInitializeNtfsData\n") );
//
// Zero the record and set its node type code and size
//
RtlZeroMemory( &NtfsData, sizeof(NTFS_DATA));
NtfsData.NodeTypeCode = NTFS_NTC_DATA_HEADER;
NtfsData.NodeByteSize = sizeof(NTFS_DATA);
//
// Initialize the queue of mounted Vcbs
//
InitializeListHead(&NtfsData.VcbQueue);
//
// This list head keeps track of closes yet to be done.
//
InitializeListHead( &NtfsData.AsyncCloseList );
InitializeListHead( &NtfsData.DelayedCloseList );
ExInitializeWorkItem( &NtfsData.NtfsCloseItem,
(PWORKER_THREAD_ROUTINE)NtfsFspClose,
NULL );
//
// Set the driver object, device object, and initialize the global
// resource protecting the file system
//
NtfsData.DriverObject = DriverObject;
ExInitializeResource( &NtfsData.Resource );
//
// Now allocate and initialize the s-list structures used as our pool
// of IRP context records. The size of the zone is based on the
// system memory size. We also initialize the spin lock used to protect
// the zone.
//
KeInitializeSpinLock( &NtfsData.StrucSupSpinLock );
{
switch ( MmQuerySystemSize() ) {
case MmSmallSystem:
NtfsData.FreeEresourceTotal = 14;
//
// Nonpaged Lookaside list maximum depths
//
FileLockMaxDepth = 8;
IoContextMaxDepth = 8;
IrpContextMaxDepth = 4;
KeventMaxDepth = 8;
ScbNonpagedMaxDepth = 8;
ScbSnapshotMaxDepth = 8;
//
// Paged Lookaside list maximum depths
//
CcbDataMaxDepth = 4;
CcbMaxDepth = 4;
DeallocatedRecordsMaxDepth = 8;
FcbDataMaxDepth = 8;
FcbIndexMaxDepth = 4;
IndexContextMaxDepth = 8;
LcbMaxDepth = 4;
NukemMaxDepth = 8;
ScbDataMaxDepth = 4;
SetFlag( NtfsData.Flags, NTFS_FLAGS_SMALL_SYSTEM );
NtfsMaxDelayedCloseCount = MAX_DELAYED_CLOSE_COUNT;
break;
case MmMediumSystem:
NtfsData.FreeEresourceTotal = 30;
//
// Nonpaged Lookaside list maximum depths
//
FileLockMaxDepth = 8;
IoContextMaxDepth = 8;
IrpContextMaxDepth = 8;
KeventMaxDepth = 8;
ScbNonpagedMaxDepth = 30;
ScbSnapshotMaxDepth = 8;
//
// Paged Lookaside list maximum depths
//
CcbDataMaxDepth = 12;
CcbMaxDepth = 6;
DeallocatedRecordsMaxDepth = 8;
FcbDataMaxDepth = 30;
FcbIndexMaxDepth = 12;
IndexContextMaxDepth = 8;
LcbMaxDepth = 12;
NukemMaxDepth = 8;
ScbDataMaxDepth = 12;
SetFlag( NtfsData.Flags, NTFS_FLAGS_MEDIUM_SYSTEM );
NtfsMaxDelayedCloseCount = 4 * MAX_DELAYED_CLOSE_COUNT;
break;
case MmLargeSystem:
SetFlag( NtfsData.Flags, NTFS_FLAGS_LARGE_SYSTEM );
NtfsMaxDelayedCloseCount = 16 * MAX_DELAYED_CLOSE_COUNT;
if (MmIsThisAnNtAsSystem()) {
NtfsData.FreeEresourceTotal = 256;
//
// Nonpaged Lookaside list maximum depths
//
FileLockMaxDepth = 8;
IoContextMaxDepth = 8;
IrpContextMaxDepth = 256;
KeventMaxDepth = 8;
ScbNonpagedMaxDepth = 128;
ScbSnapshotMaxDepth = 8;
//
// Paged Lookaside list maximum depths
//
CcbDataMaxDepth = 40;
CcbMaxDepth = 20;
DeallocatedRecordsMaxDepth = 8;
FcbDataMaxDepth = 128;
FcbIndexMaxDepth = 40;
IndexContextMaxDepth = 8;
LcbMaxDepth = 40;
NukemMaxDepth = 8;
ScbDataMaxDepth = 40;
} else {
NtfsData.FreeEresourceTotal = 128;
//
// Nonpaged Lookaside list maximum depths
//
FileLockMaxDepth = 8;
IoContextMaxDepth = 8;
IrpContextMaxDepth = 64;
KeventMaxDepth = 8;
ScbNonpagedMaxDepth = 64;
ScbSnapshotMaxDepth = 8;
//
// Paged Lookaside list maximum depths
//
CcbDataMaxDepth = 20;
CcbMaxDepth = 10;
DeallocatedRecordsMaxDepth = 8;
FcbDataMaxDepth = 64;
FcbIndexMaxDepth = 20;
IndexContextMaxDepth = 8;
LcbMaxDepth = 20;
NukemMaxDepth = 8;
ScbDataMaxDepth = 20;
}
break;
}
NtfsMinDelayedCloseCount = NtfsMaxDelayedCloseCount * 4 / 5;
}
//
// Initialize our various lookaside lists. To make it a bit more readable we'll
// define two quick macros to do the initialization
//
#if DBG && i386 && defined (NTFSPOOLCHECK)
#define NPagedInit(L,S,T,D) { ExInitializeNPagedLookasideList( (L), NtfsDebugAllocatePoolWithTag, NtfsDebugFreePool, POOL_RAISE_IF_ALLOCATION_FAILURE, S, T, D); }
#define PagedInit(L,S,T,D) { ExInitializePagedLookasideList( (L), NtfsDebugAllocatePoolWithTag, NtfsDebugFreePool, POOL_RAISE_IF_ALLOCATION_FAILURE, S, T, D); }
#else // DBG && i386
#define NPagedInit(L,S,T,D) { ExInitializeNPagedLookasideList( (L), NULL, NULL, POOL_RAISE_IF_ALLOCATION_FAILURE, S, T, D); }
#define PagedInit(L,S,T,D) { ExInitializePagedLookasideList( (L), NULL, NULL, POOL_RAISE_IF_ALLOCATION_FAILURE, S, T, D); }
#endif // DBG && i386
NPagedInit( &NtfsFileLockLookasideList, sizeof(FILE_LOCK), 'kftN', FileLockMaxDepth );
NPagedInit( &NtfsIoContextLookasideList, sizeof(NTFS_IO_CONTEXT), 'IftN', IoContextMaxDepth );
NPagedInit( &NtfsIrpContextLookasideList, sizeof(IRP_CONTEXT), 'iftN', IrpContextMaxDepth );
NPagedInit( &NtfsKeventLookasideList, sizeof(KEVENT), 'KftN', KeventMaxDepth );
NPagedInit( &NtfsScbNonpagedLookasideList, sizeof(SCB_NONPAGED), 'nftN', ScbNonpagedMaxDepth );
NPagedInit( &NtfsScbSnapshotLookasideList, sizeof(SCB_SNAPSHOT), 'TftN', ScbSnapshotMaxDepth );
PagedInit( &NtfsCcbLookasideList, sizeof(CCB), 'CftN', CcbMaxDepth );
PagedInit( &NtfsCcbDataLookasideList, sizeof(CCB_DATA), 'cftN', CcbDataMaxDepth );
PagedInit( &NtfsDeallocatedRecordsLookasideList, sizeof(DEALLOCATED_RECORDS), 'DftN', DeallocatedRecordsMaxDepth );
PagedInit( &NtfsFcbDataLookasideList, sizeof(FCB_DATA), 'fftN', FcbDataMaxDepth );
PagedInit( &NtfsFcbIndexLookasideList, sizeof(FCB_INDEX), 'FftN', FcbIndexMaxDepth );
PagedInit( &NtfsIndexContextLookasideList, sizeof(INDEX_CONTEXT), 'EftN', IndexContextMaxDepth );
PagedInit( &NtfsLcbLookasideList, sizeof(LCB), 'lftN', LcbMaxDepth );
PagedInit( &NtfsNukemLookasideList, sizeof(NUKEM), 'NftN', NukemMaxDepth );
PagedInit( &NtfsScbDataLookasideList, SIZEOF_SCB_DATA, 'sftN', ScbDataMaxDepth );
//
// Initialize the cache manager callback routines, First are the routines
// for normal file manipulations, followed by the routines for
// volume manipulations.
//
{
PCACHE_MANAGER_CALLBACKS Callbacks = &NtfsData.CacheManagerCallbacks;
Callbacks->AcquireForLazyWrite = &NtfsAcquireScbForLazyWrite;
Callbacks->ReleaseFromLazyWrite = &NtfsReleaseScbFromLazyWrite;
Callbacks->AcquireForReadAhead = &NtfsAcquireScbForReadAhead;
Callbacks->ReleaseFromReadAhead = &NtfsReleaseScbFromReadAhead;
}
{
PCACHE_MANAGER_CALLBACKS Callbacks = &NtfsData.CacheManagerVolumeCallbacks;
Callbacks->AcquireForLazyWrite = &NtfsAcquireVolumeFileForLazyWrite;
Callbacks->ReleaseFromLazyWrite = &NtfsReleaseVolumeFileFromLazyWrite;
Callbacks->AcquireForReadAhead = NULL;
Callbacks->ReleaseFromReadAhead = NULL;
}
//
// Initialize the queue of read ahead threads
//
InitializeListHead(&NtfsData.ReadAheadThreads);
//
// Set up global pointer to our process.
//
NtfsData.OurProcess = PsGetCurrentProcess();
//
// Use a try-finally to cleanup on errors.
//
try {
SECURITY_DESCRIPTOR NewDescriptor;
SID_IDENTIFIER_AUTHORITY Authority = SECURITY_NT_AUTHORITY;
SubjectContext = NtfsAllocatePool( PagedPool, sizeof( SECURITY_SUBJECT_CONTEXT ));
SeCaptureSubjectContext( SubjectContext );
CapturedSubjectContext = TRUE;
//
// Build the default security descriptor which gives full access to
// system and administrator.
//
AdminSid = (PSID) NtfsAllocatePool( PagedPool, RtlLengthRequiredSid( 2 ));
RtlInitializeSid( AdminSid, &Authority, 2 );
*(RtlSubAuthoritySid( AdminSid, 0 )) = SECURITY_BUILTIN_DOMAIN_RID;
*(RtlSubAuthoritySid( AdminSid, 1 )) = DOMAIN_ALIAS_RID_ADMINS;
SystemSid = (PSID) NtfsAllocatePool( PagedPool, RtlLengthRequiredSid( 1 ));
RtlInitializeSid( SystemSid, &Authority, 1 );
*(RtlSubAuthoritySid( SystemSid, 0 )) = SECURITY_LOCAL_SYSTEM_RID;
SystemDaclLength = sizeof( ACL ) +
(2 * sizeof( ACCESS_ALLOWED_ACE )) +
SeLengthSid( AdminSid ) +
SeLengthSid( SystemSid ) +
8; // The 8 is just for good measure
SystemDacl = NtfsAllocatePool( PagedPool, SystemDaclLength );
Status = RtlCreateAcl( SystemDacl, SystemDaclLength, ACL_REVISION2 );
if (!NT_SUCCESS( Status )) { leave; }
Status = RtlAddAccessAllowedAce( SystemDacl,
ACL_REVISION2,
GENERIC_ALL,
SystemSid );
if (!NT_SUCCESS( Status )) { leave; }
Status = RtlAddAccessAllowedAce( SystemDacl,
ACL_REVISION2,
GENERIC_ALL,
AdminSid );
if (!NT_SUCCESS( Status )) { leave; }
Status = RtlCreateSecurityDescriptor( &NewDescriptor,
SECURITY_DESCRIPTOR_REVISION1 );
if (!NT_SUCCESS( Status )) { leave; }
Status = RtlSetDaclSecurityDescriptor( &NewDescriptor,
TRUE,
SystemDacl,
FALSE );
if (!NT_SUCCESS( Status )) { leave; }
Status = SeAssignSecurity( NULL,
&NewDescriptor,
&NtfsData.DefaultDescriptor,
FALSE,
SubjectContext,
IoGetFileObjectGenericMapping(),
PagedPool );
if (!NT_SUCCESS( Status )) { leave; }
NtfsData.DefaultDescriptorLength = RtlLengthSecurityDescriptor( NtfsData.DefaultDescriptor );
ASSERT( SeValidSecurityDescriptor( NtfsData.DefaultDescriptorLength,
NtfsData.DefaultDescriptor ));
} finally {
if (CapturedSubjectContext) {
SeReleaseSubjectContext( SubjectContext );
}
if (SubjectContext != NULL) { NtfsFreePool( SubjectContext ); }
if (SystemDacl != NULL) { NtfsFreePool( SystemDacl ); }
if (AdminSid != NULL) { NtfsFreePool( AdminSid ); }
if (SystemSid != NULL) { NtfsFreePool( SystemSid ); }
}
//
// Raise if we hit an error building the security descriptor.
//
if (!NT_SUCCESS( Status )) { ExRaiseStatus( Status ); }
//
// And return to our caller
//
DebugTrace( -1, Dbg, ("NtfsInitializeNtfsData -> VOID\n") );
return;
}
VOID
UdfInitializeGlobalData (
IN PDRIVER_OBJECT DriverObject,
IN PDEVICE_OBJECT *UdfsFileSystemDeviceObjects
)
/*++
Routine Description:
This routine initializes the global Udfs data structures.
Arguments:
DriverObject - Supplies the driver object for UDFS.
FileSystemDeviceObjects - Supplies a vector of device objects for UDFS.
Return Value:
None.
--*/
{
USHORT CcbMaxDepth;
USHORT FcbDataMaxDepth;
USHORT FcbIndexMaxDepth;
USHORT FcbNonPagedMaxDepth;
USHORT IrpContextMaxDepth;
USHORT LcbMaxDepth;
//
// Start by initializing the FastIoDispatch Table.
//
RtlZeroMemory( &UdfFastIoDispatch, sizeof( FAST_IO_DISPATCH ));
UdfFastIoDispatch.SizeOfFastIoDispatch = sizeof(FAST_IO_DISPATCH);
UdfFastIoDispatch.AcquireFileForNtCreateSection = UdfAcquireForCreateSection;
UdfFastIoDispatch.ReleaseFileForNtCreateSection = UdfReleaseForCreateSection;
UdfFastIoDispatch.FastIoCheckIfPossible = UdfFastIoCheckIfPossible; // CheckForFastIo
UdfFastIoDispatch.FastIoRead = FsRtlCopyRead; // Read
UdfFastIoDispatch.FastIoQueryBasicInfo = NULL; // QueryBasicInfo
UdfFastIoDispatch.FastIoQueryStandardInfo = NULL; // QueryStandardInfo
UdfFastIoDispatch.FastIoLock = NULL; // Lock
UdfFastIoDispatch.FastIoUnlockSingle = NULL; // UnlockSingle
UdfFastIoDispatch.FastIoUnlockAll = NULL; // UnlockAll
UdfFastIoDispatch.FastIoUnlockAllByKey = NULL; // UnlockAllByKey
UdfFastIoDispatch.FastIoQueryNetworkOpenInfo = NULL; // QueryNetworkInfo
//
// Initialize the CRC table. Per UDF 1.01, we use the seed 10041 octal (4129 dec).
//
UdfInitializeCrc16( 4129 );
//
// Initialize the UdfData structure.
//
RtlZeroMemory( &UdfData, sizeof( UDF_DATA ));
UdfData.NodeTypeCode = UDFS_NTC_DATA_HEADER;
UdfData.NodeByteSize = sizeof( UDF_DATA );
UdfData.DriverObject = DriverObject;
RtlCopyMemory( &UdfData.FileSystemDeviceObjects,
UdfsFileSystemDeviceObjects,
sizeof(PDEVICE_OBJECT) * NUMBER_OF_FS_OBJECTS );
InitializeListHead( &UdfData.VcbQueue );
ExInitializeResource( &UdfData.DataResource );
//
// Initialize the cache manager callback routines
//
UdfData.CacheManagerCallbacks.AcquireForLazyWrite = &UdfAcquireForCache;
UdfData.CacheManagerCallbacks.ReleaseFromLazyWrite = &UdfReleaseFromCache;
UdfData.CacheManagerCallbacks.AcquireForReadAhead = &UdfAcquireForCache;
UdfData.CacheManagerCallbacks.ReleaseFromReadAhead = &UdfReleaseFromCache;
UdfData.CacheManagerVolumeCallbacks.AcquireForLazyWrite = &UdfNoopAcquire;
UdfData.CacheManagerVolumeCallbacks.ReleaseFromLazyWrite = &UdfNoopRelease;
UdfData.CacheManagerVolumeCallbacks.AcquireForReadAhead = &UdfNoopAcquire;
UdfData.CacheManagerVolumeCallbacks.ReleaseFromReadAhead = &UdfNoopRelease;
//
// Initialize the lock mutex and the async and delay close queues.
//
ExInitializeFastMutex( &UdfData.UdfDataMutex );
InitializeListHead( &UdfData.AsyncCloseQueue );
InitializeListHead( &UdfData.DelayedCloseQueue );
ExInitializeWorkItem( &UdfData.CloseItem,
(PWORKER_THREAD_ROUTINE) UdfFspClose,
NULL );
//
// Do the initialization based on the system size.
//
switch (MmQuerySystemSize()) {
case MmSmallSystem:
IrpContextMaxDepth = 4;
UdfData.MaxDelayedCloseCount = 10;
UdfData.MinDelayedCloseCount = 2;
break;
case MmLargeSystem:
IrpContextMaxDepth = 24;
UdfData.MaxDelayedCloseCount = 72;
UdfData.MinDelayedCloseCount = 18;
break;
default:
case MmMediumSystem:
IrpContextMaxDepth = 8;
UdfData.MaxDelayedCloseCount = 32;
UdfData.MinDelayedCloseCount = 8;
break;
}
//
// Size lookasides to match what will commonly be dumped into them when we
// run down the delayed close queues.
//
LcbMaxDepth =
CcbMaxDepth =
FcbDataMaxDepth =
FcbNonPagedMaxDepth = (USHORT) (UdfData.MaxDelayedCloseCount - UdfData.MinDelayedCloseCount);
//
// We should tend to have fewer indices than files.
//
FcbIndexMaxDepth = FcbNonPagedMaxDepth / 2;
#define NPagedInit(L,S,T,D) { ExInitializeNPagedLookasideList( (L), NULL, NULL, POOL_RAISE_IF_ALLOCATION_FAILURE, S, T, D); }
#define PagedInit(L,S,T,D) { ExInitializePagedLookasideList( (L), NULL, NULL, POOL_RAISE_IF_ALLOCATION_FAILURE, S, T, D); }
NPagedInit( &UdfIrpContextLookasideList, sizeof( IRP_CONTEXT ), TAG_IRP_CONTEXT, IrpContextMaxDepth );
NPagedInit( &UdfFcbNonPagedLookasideList, sizeof( FCB_NONPAGED ), TAG_FCB_NONPAGED, FcbNonPagedMaxDepth );
PagedInit( &UdfCcbLookasideList, sizeof( CCB ), TAG_CCB, CcbMaxDepth );
PagedInit( &UdfFcbIndexLookasideList, SIZEOF_FCB_INDEX, TAG_FCB_INDEX, FcbIndexMaxDepth );
PagedInit( &UdfFcbDataLookasideList, SIZEOF_FCB_DATA, TAG_FCB_DATA, FcbDataMaxDepth );
PagedInit( &UdfLcbLookasideList, SIZEOF_LOOKASIDE_LCB, TAG_LCB, LcbMaxDepth );
}
