61 lines
2.6 KiB
C
61 lines
2.6 KiB
C
/*++
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Copyright (c) 1989 Microsoft Corporation
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Module Name:
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fsctrl.c
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Abstract:
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This module contains the code to implement the NtFsControlFile system service for the NT I/O system.
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Author:
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Darryl E. Havens (darrylh) 16-Oct-1989
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Environment:
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Kernel mode only
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--*/
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#include "iop.h"
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE, NtFsControlFile)
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#endif
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NTSTATUS
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NtFsControlFile(
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IN HANDLE FileHandle,
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IN HANDLE Event OPTIONAL,
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IN PIO_APC_ROUTINE ApcRoutine OPTIONAL,
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IN PVOID ApcContext OPTIONAL,
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OUT PIO_STATUS_BLOCK IoStatusBlock,
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IN ULONG IoControlCode,
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IN PVOID InputBuffer OPTIONAL,
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IN ULONG InputBufferLength,
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OUT PVOID OutputBuffer OPTIONAL,
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IN ULONG OutputBufferLength
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)
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/*++
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Routine Description:
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This service builds descriptors or MDLs for the supplied buffer(s) and passes the untyped data to the file system associated with the file handle.
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It is up to the file system to check the input data and function IoControlCode for validity, as well as to make the appropriate access checks.
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Arguments:
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FileHandle - Supplies a handle to the file on which the service is being performed.
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Event - Supplies an optional event to be set to the Signaled state when the service is complete.
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ApcRoutine - Supplies an optional APC routine to be executed when the service is complete.
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ApcContext - Supplies a context parameter to be passed to the ApcRoutine, if an ApcRoutine was specified.
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IoStatusBlock - Address of the caller's I/O status block.
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IoControlCode - Subfunction code to determine exactly what operation is being performed.
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InputBuffer - Optionally supplies an input buffer to be passed to the file system.
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Whether or not the buffer is actually optional is dependent on the IoControlCode.
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InputBufferLength - Length of the InputBuffer in bytes.
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OutputBuffer - Optionally supplies an output buffer to receive information from the file system.
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Whether or not the buffer is actually optional is dependent on the IoControlCode.
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OutputBufferLength - Length of the OutputBuffer in bytes.
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Return Value:
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The status returned is success if the control operation was properly queued to the I/O system.
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Once the operation completes, the status can be determined by examining the Status field of the I/O status block.
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--*/
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{
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// Simply invoke the common routine that implements both device and file system I/O controls.
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return IopXxxControlFile( FileHandle, Event, ApcRoutine, ApcContext, IoStatusBlock, IoControlCode, InputBuffer, InputBufferLength, OutputBuffer, OutputBufferLength, FALSE );
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} |