IOCTL_STORAGE_MANAGE_BYPASS_IO IOCTL (ntddstor.h)
The IOCTL_STORAGE_MANAGE_BYPASS_IO control code controls BypassIO operations on a given file in all layers of the volume and storage stacks.
Major code
Input buffer
The buffer at Irp->AssociatedIrp.SystemBuffer contains a BPIO_INPUT structure with information related to a BypassIO request.
Input buffer length
Parameters.DeviceIoControl.InputBufferLength in the I/O stack location of the IRP indicates the size, in bytes, of the buffer, which must be at least sizeof(BPIO_INPUT).
Output buffer
The driver returns information in a BPIO_OUTPUT structure in the buffer at Irp->AssociatedIrp.SystemBuffer.
Output buffer length
Parameters.DeviceIoControl.OutputBufferLength in the I/O stack location of the IRP indicates the size of the output buffer, in bytes. OutputBufferLength must be at least sizeof(BPIO_OUTPUT).
Input / Output buffer
n/a
Input / Output buffer length
n/a
Status block
The Status field can be set to STATUS_SUCCESS, or an error status such as STATUS_INVALID_PARAMETER, STATUS_INFO_LENGTH_MISMATCH, STATUS_BUFFER_TOO_SMALL, or STATUS_NOT_SUPPORTED.
Remarks
Only file systems send IOCTL_STORAGE_MANAGE_BYPASS_IO. A file system sends this IOCTL as appropriate in response to a FSCTL_MANAGE_BYPASS_IO control code.
See BypassIO for storage drivers for more information.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 11 |
| Header | ntddstor.h |