static NTSTATUS STDCALL AoeBusDevCtlDetach_(IN PIRP irp) {
PIO_STACK_LOCATION io_stack_loc = IoGetCurrentIrpStackLocation(irp);
UINT32 unit_num;
WVL_SP_BUS_NODE walker;
AOE_SP_DISK aoe_disk = NULL;
unit_num = *((PUINT32) irp->AssociatedIrp.SystemBuffer);
DBG("Request to detach unit: %d\n", unit_num);
walker = NULL;
/* For each node on the bus... */
WvlBusLock(&AoeBusMain);
while (walker = WvlBusGetNextNode(&AoeBusMain, walker)) {
aoe_disk = CONTAINING_RECORD(walker, AOE_S_DISK, BusNode[0]);
/* If the unit number matches... */
if (WvlBusGetNodeNum(walker) == unit_num) {
/* If it's not a boot-time device... */
if (aoe_disk->Boot) {
DBG("Cannot detach a boot-time device.\n");
/* Signal error. */
aoe_disk = NULL;
break;
}
}
}
WvlBusUnlock(&AoeBusMain);
if (!aoe_disk) {
DBG("Unit %d not found.\n", unit_num);
return WvlIrpComplete(irp, 0, STATUS_INVALID_PARAMETER);
}
/* Detach the node. */
WvlBusRemoveNode(aoe_disk->BusNode);
DBG("Removed unit %d.\n", unit_num);
return WvlIrpComplete(irp, 0, STATUS_SUCCESS);
}
/* Filedisk disk-unit query-response routine. */
static UCHAR STDCALL WvFilediskUnitNum_(IN WVL_SP_DISK_T disk) {
WV_SP_FILEDISK_T filedisk = CONTAINING_RECORD(
disk,
WV_S_FILEDISK_T,
disk[0]
);
/* Possible precision loss. */
return (UCHAR) WvlBusGetNodeNum(&filedisk->Dev->BusNode);
}
