Function vkGetMemoryFdPropertiesKHR 

pub unsafe extern "system" fn vkGetMemoryFdPropertiesKHR(
    device: VkDevice,
    handleType: VkExternalMemoryHandleTypeFlagBits,
    fd: c_int,
    pMemoryFdProperties: *mut VkMemoryFdPropertiesKHR,
) -> VkResult

Available if built with prototypes.