FILTER_VOLUME_STANDARD_INFORMATION structure

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.

FlagMeaning

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

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

Version

This structure is available starting with Windows Vista.

Header

Fltuserstructures.h (include FltUser.h or FltKernel.h)

See also

FILTER_VOLUME_BASIC_INFORMATION
FilterVolumeFindClose
FilterVolumeFindFirst
FilterVolumeFindNext
FltEnumerateVolumeInformation
FltEnumerateVolumes

 

 

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