// ntifs.h

typedef struct _FS_BPIO_INFO {
  ULONG  ActiveBypassIoCount;
  USHORT StorageDriverNameLen;
  WCHAR  StorageDriverName[32];
} FS_BPIO_INFO, *PFS_BPIO_INFO;
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Windows Driver Kit DDI reference (ns-ntifs-fs_bpio_info)

Description

The FS_BPIO_INFO structure provides information about the BypassIO state of the volume.

Members

`ActiveBypassIoCount`

The number of BypassIO-enabled files that are currently open.

`StorageDriverNameLen`

Receives the length of the string stored in StorageDriverName, in characters.

`StorageDriverName`

Receives a string that specifies the name of the storage driver for this volume.

Remarks

FS_BPIO_INFO is returned when the requested BypassIO operation is FS_BPIO_OP_GET_INFO, and in the FS_BPIO_OPERATIONS structure when the requested BypassIO operation is FS_BPIO_OP_ENABLE or FS_BPIO_OP_QUERY.

See BypassIO for filter drivers and Supporting BypassIO operations for more information.

FS_BPIO_INFO - NtDoc