// ntifs.h

void FsRtlGetBypassIoOpenCount(
  _fo
);
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Windows Driver Kit DDI reference (nf-ntifs-fsrtlgetbypassioopencount)

Description

FsRtlGetBypassIoOpenCount returns a count of how many BypassIO opens there are for a given stream.

Parameters

`_fo`

The file object on which the query is being made.

Remarks

When FSRTL_ADVANCED_FCB_HEADER.Version is >= FSRTL_FCB_HEADER_V4, FsRtlGetBypassIoOpenCountPtr returns the current value of that structure's BypassIoOpenCount field. This routine returns zero for earlier version numbers, which do not have a BypassIoOpenCount field.

See BypassIO for filter drivers for more information.