Function validate_gpu_request

crates/openshell-driver-vm/src/driver.rs:3172–3197

(sandbox: &Sandbox, gpu_enabled: bool)

#[allow(clippy::result_large_err)]
fn validate_gpu_request(sandbox: &Sandbox, gpu_enabled: bool) -> Result<(), Status> {
    let spec = sandbox
        .spec
        .as_ref()
        .ok_or_else(|| Status::invalid_argument("sandbox spec is required"))?;

    let gpu_requirements = driver_gpu_requirements(spec.resource_requirements.as_ref());
    let gpu_count =
        effective_driver_gpu_count(gpu_requirements).map_err(Status::invalid_argument)?;

    if gpu_requirements.is_some() && !gpu_enabled {
        return Err(Status::failed_precondition(
            "GPU support is not enabled on this driver; start with --gpu",
        ));
    }

    let _ = vm_gpu_device_id(sandbox)?;

    if gpu_count.is_some_and(|count| count > 1) {
        return Err(Status::invalid_argument(
            "VM GPU sandboxes support only one GPU",
        ));
    }

    Ok(())
}

#[allow(clippy::result_large_err)]
fn vm_gpu_device_id(sandbox: &Sandbox) -> Result<Option<String>, Status> {