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File Management Control Codes

The following control codes are used in file management.

In this section

Control CodeDescription

FSCTL_ALLOW_EXTENDED_DASD_IO

Signals the file system driver not to perform any I/O boundary checks on partition read or write calls.

FSCTL_CREATE_OR_GET_OBJECT_ID

Retrieves the object identifier for the specified file or directory. If no object identifier exists, using FSCTL_CREATE_OR_GET_OBJECT_ID creates one.

FSCTL_CSV_CONTROL

Retrieves the results of a CSV control operation.

FSCTL_DELETE_OBJECT_ID

Removes the object identifier from a specified file or directory.

FSCTL_FILE_LEVEL_TRIM

Indicates to the storage system which ranges in the file are not needed to be stored.

FSCTL_FILESYSTEM_GET_STATISTICS

Retrieves the information from various file system performance counters.

FSCTL_FILESYSTEM_GET_STATISTICS_EX

Retrieves the information from various file system performance counters.

Support for this control code started with Windows 10.

FSCTL_FIND_FILES_BY_SID

Searches a directory for a file whose creator owner matches the specified SID.

FSCTL_GET_COMPRESSION

Retrieves the current compression state of a file or directory on a volume whose file system supports per-stream compression.

FSCTL_GET_NTFS_FILE_RECORD

Retrieves the first file record that is in use and is of a lesser than or equal ordinal value to the requested file reference number.

FSCTL_GET_OBJECT_ID

Retrieves the object identifier for the specified file or directory.

FSCTL_GET_REPAIR

Retrieves information about the NTFS file system's self-healing mechanism.

FSCTL_INITIATE_REPAIR

Triggers the NTFS file system to start a self-healing cycle on a single file.

FSCTL_MAKE_MEDIA_COMPATIBLE

Closes an open UDF session on write-once media to make the media ROM compatible.

FSCTL_OPBATCH_ACK_CLOSE_PENDING

Notifies a server that a client application is ready to close a file.

FSCTL_OPLOCK_BREAK_ACK_NO_2

Responds to notification that an opportunistic lock on a file is about to be broken. Use this operation to unlock all opportunistic locks on the file but keep the file open.

FSCTL_OPLOCK_BREAK_ACKNOWLEDGE

Responds to notification that an exclusive opportunistic lock on a file is about to be broken. Use this operation to indicate that the file should receive a level 2 opportunistic lock.

FSCTL_OPLOCK_BREAK_NOTIFY

Enables the calling application to wait for completion of an opportunistic lock break.

FSCTL_QUERY_ALLOCATED_RANGES

Scans a file or alternate stream looking for ranges that may contain nonzero data.

FSCTL_QUERY_ON_DISK_VOLUME_INFO

Requests UDF-specific volume information.

FSCTL_QUERY_SPARING_INFO

Retrieves the defect management properties of the volume. Used for UDF file systems.

FSCTL_RECALL_FILE

Recalls a file from storage media that Remote Storage manages, which is the hierarchical storage management software.

FSCTL_REQUEST_BATCH_OPLOCK

Requests a batch opportunistic lock on a file.

FSCTL_REQUEST_FILTER_OPLOCK

Requests a filter opportunistic lock on a file.

FSCTL_REQUEST_OPLOCK

Requests an opportunistic lock (oplock) on a file and acknowledges that an oplock break has occurred.

FSCTL_REQUEST_OPLOCK_LEVEL_1

Requests a level 1 opportunistic lock on a file.

FSCTL_REQUEST_OPLOCK_LEVEL_2

Requests a level 2 opportunistic lock on a file.

FSCTL_SET_COMPRESSION

Sets the compression state of a file or directory on a volume whose file system supports per-file and per-directory compression.

FSCTL_SET_DEFECT_MANAGEMENT

Sets the software defect management state for the specified file. Used for UDF file systems.

FSCTL_SET_OBJECT_ID

Sets the object identifier for the specified file or directory.

FSCTL_SET_OBJECT_ID_EXTENDED

Modifies user data associated with the object identifier for the specified file or directory.

FSCTL_SET_REPAIR

Sets the mode of an NTFS file system's self-healing capability.

FSCTL_SET_SPARSE

Marks the indicated file as sparse or not sparse. In a sparse file, large ranges of zeros may not require disk allocation.

FSCTL_SET_ZERO_DATA

Fills a specified range of a file with zeros (0).

FSCTL_SET_ZERO_ON_DEALLOCATION

Indicates an NTFS file system file handle should have its clusters filled with zeros when it is deallocated.

FSCTL_WAIT_FOR_REPAIR

Returns when the specified repairs are completed.

 

The following control codes are used with file compression and decompression.

FSCTL_GET_COMPRESSION
FSCTL_SET_COMPRESSION

The following control codes are used with object identifiers.

FSCTL_CREATE_OR_GET_OBJECT_ID
FSCTL_DELETE_OBJECT_ID
FSCTL_GET_OBJECT_ID
FSCTL_SET_OBJECT_ID
FSCTL_SET_OBJECT_ID_EXTENDED

The following control codes are used with opportunistic locks.

FSCTL_OPBATCH_ACK_CLOSE_PENDING
FSCTL_OPLOCK_BREAK_ACK_NO_2
FSCTL_OPLOCK_BREAK_ACKNOWLEDGE
FSCTL_OPLOCK_BREAK_NOTIFY
FSCTL_REQUEST_BATCH_OPLOCK
FSCTL_REQUEST_FILTER_OPLOCK
FSCTL_REQUEST_OPLOCK
FSCTL_REQUEST_OPLOCK_LEVEL_1
FSCTL_REQUEST_OPLOCK_LEVEL_2

The following control codes are used with sparse files.

FSCTL_QUERY_ALLOCATED_RANGES
FSCTL_SET_SPARSE
FSCTL_SET_ZERO_DATA

The following control codes are used with the NTFS self-healing mechanism.

FSCTL_GET_REPAIR
FSCTL_INITIATE_REPAIR
FSCTL_SET_REPAIR
FSCTL_WAIT_FOR_REPAIR

The following control codes are used with UDF.

FSCTL_MAKE_MEDIA_COMPATIBLE
FSCTL_QUERY_ON_DISK_VOLUME_INFO
FSCTL_QUERY_SPARING_INFO
FSCTL_SET_DEFECT_MANAGEMENT

Related topics

Directory Management Control Codes
Volume Management Control Codes

 

 

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