FILTER_VOLUME_STANDARD_INFORMATION structure (fltuserstructures.h)

The caller-allocated FILTER_VOLUME_STANDARD_INFORMATION structure contains information for a volume.

Syntax

typedef struct _FILTER_VOLUME_STANDARD_INFORMATION {
  ULONG               NextEntryOffset;
  ULONG               Flags;
  ULONG               FrameID;
  FLT_FILESYSTEM_TYPE FileSystemType;
  USHORT              FilterVolumeNameLength;
  WCHAR               FilterVolumeName[1];
} FILTER_VOLUME_STANDARD_INFORMATION, *PFILTER_VOLUME_STANDARD_INFORMATION;

Members

NextEntryOffset

Read-only offset, in bytes, of the next FILTER_VOLUME_STANDARD_INFORMATION structure if multiple structures are present in the buffer. This member is zero if no other structures follow this one.

Flags

A read-only bitmask of system-defined flags that describe attributes of the volume. The following are valid flag values.

Flag	Meaning
FLTFL_VSI_DETACHED_VOLUME	The volume in not currently attached to a storage stack.

FrameID

Read-only member used to identify the filter manager frame that the volume is in.

FileSystemType

Read-only member used to identify the type of file system being used on the volume. The possible values for this member are listed in FLT_FILESYSTEM_TYPE.

FilterVolumeNameLength

Read-only length, in bytes, of the volume name.

FilterVolumeName[1]

Read-only name of the volume of FilterVolumeNameLength length. This Unicode string is not NULL-terminated.

Remarks

Filter manager enumeration routines, such as FltEnumerateVolumeInformation, can fill a buffer with structures of type FILTER_VOLUME_STANDARD_INFORMATION where each structure represents a volume known to filter manager. This list of structures can contain multiple volumes with the same name. For more information, see Understanding Volume Enumerations with Duplicate Volume Names.

The FILTER_VOLUME_STANDARD_INFORMATION structure must be aligned on a LONGLONG (8-byte) boundary. If a buffer contains two or more of these structures, the NextEntryOffset value in each entry falls on an 8-byte boundary.

A FILTER_VOLUME_STANDARD_INFORMATION structure can be allocated from paged or nonpaged pool.

Requirements

Requirement	Value
Minimum supported client	This structure is available starting with Windows Vista.
Header	fltuserstructures.h (include FltUser.h, FltKernel.h)

See also

FILTER_VOLUME_BASIC_INFORMATION

FilterVolumeFindClose

FilterVolumeFindFirst

FilterVolumeFindNext

FltEnumerateVolumeInformation

FltEnumerateVolumes