FSH_CALLDRIVER
Purpose
This routine allows FSDs to call a device driver's Extended Strategy entry point.
Calling Sequence
int far pascal FSH_CALLDRIVER(pPkt, hVPB, fControl) void far * pPkt; unsigned short hVPB; unsigned short fControl;
Where
pPkt is a pointer to device driver Extended strategy request packet.
hVPB is the volume handle for the source of I/O.
fControl is the bit mask of pop-up control actions:
| Bit 0 off | indicates volume change pop-up desired |
| Bit 0 on | indicates no volume change pop-up |
| All other bits are reserved and must be zero. | |
Returns
If no error is detected, a zero error code is returned. If an error is detected, one of the following error codes is returned:
- ERROR_VOLUME_CHANGED – is an indication that removable media volume change has occurred.
- ERROR_INVALID_PARAMETER – the fControl flag word has reserved bits on.
Remarks
This routine should be called for any Extended strategy requests going to a drive that has removable media.
For a detailed description of the Extended Strategy request interface please see the OS/2 Version 2.0 Physical Device Driver Reference
FSH_CALLDRIVER may block.
Note: OS/2 does not validate input parameters. Therefore, an FSD should call FSH_PROBEBUF where appropriate.