/* Dummy PnP IRP handler. */
static NTSTATUS STDCALL WvDummyPnp(
IN WV_SP_DEV_T dev,
IN PIRP irp,
IN UCHAR code
) {
switch (code) {
case IRP_MN_QUERY_ID:
/* The WV_S_DEV_T extension points to the dummy IDs. */
return WvDummyIds(irp, dev->ext);
case IRP_MN_QUERY_REMOVE_DEVICE:
return WvlIrpComplete(irp, 0, STATUS_SUCCESS);
case IRP_MN_REMOVE_DEVICE:
/* Any error status for the removal slips away, here. */
WvBusRemoveDev(dev);
return WvlIrpComplete(irp, 0, STATUS_SUCCESS);
default:
/* Return whatever upper drivers in the stack yielded. */
return WvlIrpComplete(
irp,
irp->IoStatus.Information,
irp->IoStatus.Status
);
}
}
/* Attach a file as a disk, based on an IRP. */
NTSTATUS STDCALL WvFilediskAttach(IN PIRP irp) {
PCHAR buf = irp->AssociatedIrp.SystemBuffer;
WV_SP_MOUNT_DISK params = (WV_SP_MOUNT_DISK) buf;
WVL_E_DISK_MEDIA_TYPE media_type;
UINT32 sector_size;
WV_SP_FILEDISK_T filedisk;
NTSTATUS status;
ANSI_STRING ansi_path;
switch (params->type) {
case 'f':
media_type = WvlDiskMediaTypeFloppy;
sector_size = 512;
break;
case 'c':
media_type = WvlDiskMediaTypeOptical;
sector_size = 2048;
break;
default:
media_type = WvlDiskMediaTypeHard;
sector_size = 512;
break;
}
DBG("Media type: %d\n", media_type);
/* Create the filedisk PDO. */
filedisk = WvFilediskCreatePdo(media_type);
if (filedisk == NULL) {
DBG("Could not create file-backed disk!\n");
status = STATUS_INSUFFICIENT_RESOURCES;
goto err_pdo;
}
/* Set filedisk parameters. */
filedisk->disk->Media = media_type;
filedisk->disk->SectorSize = sector_size;
filedisk->disk->Cylinders = params->cylinders;
filedisk->disk->Heads = params->heads;
filedisk->disk->Sectors = params->sectors;
/* Populate the file path into a counted ANSI string. */
RtlInitAnsiString(&ansi_path, buf + sizeof *params);
/* Attempt to open the file from within the filedisk's thread. */
status = WvFilediskOpen_(filedisk, &ansi_path);
if (!NT_SUCCESS(status))
goto err_file_open;
/* Add the filedisk to the bus. */
filedisk->disk->ParentBus = WvBus.Fdo;
if (!WvBusAddDev(filedisk->Dev)) {
status = STATUS_UNSUCCESSFUL;
goto err_add_child;
}
return STATUS_SUCCESS;
WvBusRemoveDev(filedisk->Dev);
err_add_child:
/* Any open file handle will be closed upon thread exit. */
err_file_open:
WvFilediskFree_(filedisk->Dev);
err_pdo:
return status;
}
/**
* Remove a dummy PDO node on the WinVBlock bus.
*
* @v Pdo The PDO to remove.
* @ret NTSTATUS The status of the operation.
*
* It might actually be better to handle a PnP remove IOCTL.
*/
WVL_M_LIB NTSTATUS STDCALL WvDummyRemove(IN PDEVICE_OBJECT Pdo) {
/* Sanity check. */
if (Pdo->DriverObject == WvDriverObj)
return WvBusRemoveDev(WvDevFromDevObj(Pdo));
return STATUS_INVALID_PARAMETER;
}
