FSCTL_MANAGE_BYPASS_IO IOCTL (ntifs.h)
The FSCTL_MANAGE_BYPASS_IO control code controls BypassIO operations on a given file in the filter and file system stacks.
Major code
FSCTL_MANAGE_BYPASS_IO
Input buffer
Pointer to a FS_BPIO_INPUT structure containing information about the BypassIO request.
Input buffer length
Size of the FS_BPIO_INPUT structure that InputBuffer points to, in bytes.
Output buffer
Pointer to a FS_BPIO_OUTPUT structure in which to return information about the BypassIO operation.
Output buffer length
Size of the FS_BPIO_OUTPUT structure that OutputBuffer points to, in bytes.
Input / Output buffer
n/a
Input / Output buffer length
n/a
Status block
Reserved for system use.
Remarks
To perform this operation, call FltFsControlFile or ZwFsControlFile with the following parameters.
| Parameter | Description |
|---|---|
| Instance | [in] For FltFsControlFile only. An opaque instance pointer for the caller. This parameter is required and cannot be NULL. |
| FileObject | [in] For FltFsControlFile only. A file object pointer for the file or directory that is the target of this BypassIO operation request. This parameter is required and cannot be NULL. |
| FileHandle | [in] For ZwFsControlFile only. File handle of the file on which the BypassIO operation is being requested. This parameter is required and cannot be NULL. |
| FsControlCode | [in] Set to FSCTL_MANAGE_BYPASS_IO. |
| InputBuffer | [in] Pointer to a FS_BPIO_INPUT structure containing information about the BypassIO request. |
| InputBufferLength | [in] Size of the buffer that InputBuffer points to, in bytes. |
| OutputBuffer | [out] Pointer to a FS_BPIO_OUTPUT structure in which to return information about the BypassIO operation. |
| OutputBufferLength | [out] Size of the buffer that OutputBuffer points to, in bytes. |
See BypassIO for filter drivers for more information.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 11 |
| Header | ntifs.h |