//export devClose
func devClose(dev Device) {
cfgString := C.GoString(C.tcmu_get_dev_cfgstring(dev))
if cfgString == "" {
log.Errorln("Cannot find configuration string")
return
}
id := strings.TrimPrefix(cfgString, "longhorn//")
if id != volume {
//Ignore close other devs
return
}
log.Infof("Device %s removed", volume)
}
//export devOpen
func devOpen(dev Device) int {
state := &State{
backend: backend,
}
blockSizeStr := C.CString("hw_block_size")
defer C.free(unsafe.Pointer(blockSizeStr))
blockSize := int(C.tcmu_get_attribute(dev, blockSizeStr))
if blockSize == -1 {
log.Errorln("Cannot find valid hw_block_size")
return -C.EINVAL
}
state.blockSize = blockSize
size := int64(C.tcmu_get_device_size(dev))
if size == -1 {
log.Errorln("Cannot find valid disk size")
return -C.EINVAL
}
state.lbas = size / int64(state.blockSize)
cfgString := C.GoString(C.tcmu_get_dev_cfgstring(dev))
if cfgString == "" {
log.Errorln("Cannot find configuration string")
return -C.EINVAL
}
id := strings.TrimPrefix(cfgString, "longhorn//")
if id != volume {
log.Debugf("Ignore volume %s, which is not mine", id)
return -C.EINVAL
}
state.volume = id
devFd = int32(C.tcmu_get_dev_fd(dev))
go state.HandleRequest(dev)
log.Infof("Device %s added", state.volume)
return 0
}