178 lines
3.6 KiB
C
178 lines
3.6 KiB
C
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/*++
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Copyright (c) 1995 Microsoft Corporation
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Module Name:
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Ntfsexp.c
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Abstract:
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This module implements the exported routines for Ntfs
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Author:
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Jeff Havens [JHavens] 20-Dec-1995
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Revision History:
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--*/
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#include "NtfsProc.h"
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE, NtfsLoadAddOns)
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#pragma alloc_text(PAGE, NtOfsRegisterCallBacks)
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#endif
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NTSTATUS
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EfsInitialization(
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void
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);
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VOID
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NtfsLoadAddOns (
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IN PDRIVER_OBJECT DriverObject,
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IN PVOID Context,
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IN ULONG Count
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)
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/*++
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Routine Description:
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This routine attempts to initialize the efs support library.
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Arguments:
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DriverObject - Driver object for NTFS
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Context - Unused, required by I/O system.
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Count - Unused, required by I/O system.
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Return Value:
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None.
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--*/
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{
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NTSTATUS Status;
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UNREFERENCED_PARAMETER(Context);
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UNREFERENCED_PARAMETER(Count);
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UNREFERENCED_PARAMETER(DriverObject);
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//
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// do any efs initialization
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// we ignore the status return bedcause there really
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// isn't anything we can do about it and ntfs will work
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// fine without it.
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//
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if (!FlagOn( NtfsData.Flags, NTFS_FLAGS_PERSONAL )) {
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Status = EfsInitialization();
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}
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//
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// return to caller
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//
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return;
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}
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NTSTATUS
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NtOfsRegisterCallBacks (
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NTFS_ADDON_TYPES NtfsAddonType,
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PVOID CallBackTable
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)
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/*++
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Routine Description:
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This routine is called by one of the NTFS add-ons to register its
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callback routines. These routines are call by NTFS at the appropriate
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times.
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Arguments:
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NtfsAddonType - Indicates the type of callback table.
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CallBackTable - Pointer to call back routines for addon.
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Return Value:
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Returns a status indicating if the callbacks were accepted.
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--*/
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{
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NTSTATUS Status;
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PAGED_CODE();
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switch (NtfsAddonType) {
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case Encryption :
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{
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Status = STATUS_INVALID_PARAMETER;
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//
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// Bail if Ntfs has not been initialized.
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//
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if (SafeNodeType( &NtfsData ) != NTFS_NTC_DATA_HEADER) {
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return STATUS_DEVICE_DOES_NOT_EXIST;
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} else {
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//
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// Only allow one encryption driver to register.
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//
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NtfsLockNtfsData();
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if (!FlagOn( NtfsData.Flags, NTFS_FLAGS_ENCRYPTION_DRIVER )) {
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ENCRYPTION_CALL_BACK *EncryptionCallBackTable = CallBackTable;
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//
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// The caller must pass a callback table and the version must be correct.
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//
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if ((EncryptionCallBackTable != NULL) &&
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(EncryptionCallBackTable->InterfaceVersion == ENCRYPTION_CURRENT_INTERFACE_VERSION)) {
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//
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// Save the call back values.
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//
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RtlCopyMemory( &NtfsData.EncryptionCallBackTable,
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EncryptionCallBackTable,
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sizeof( ENCRYPTION_CALL_BACK ));
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#ifdef EFSDBG
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NtfsData.EncryptionCallBackTable.AfterReadProcess = NtfsDummyEfsRead;
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NtfsData.EncryptionCallBackTable.BeforeWriteProcess = NtfsDummyEfsWrite;
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#endif
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SetFlag( NtfsData.Flags, NTFS_FLAGS_ENCRYPTION_DRIVER );
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Status = STATUS_SUCCESS;
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}
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}
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NtfsUnlockNtfsData();
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return Status;
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}
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}
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default :
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return STATUS_INVALID_PARAMETER;
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}
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}
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