On Wed, Mar 25, 2026 at 03:50:16PM +0100, Björn Töpel wrote:

+def _dfs_write_u32(cfg, path, val):
+    with open(os.path.join(_nsim_dfs_path(cfg), path), "w",
+              encoding="utf-8") as f:
+        f.write(str(val))

This function doesn't seem to be called, right?

+def main() -> None:
+    """Run netdevsim loopback tests."""
+    with NetDrvEnv(__file__) as cfg:
+        cfg.ethnl = EthtoolFamily()

Given some functions above assume this is nsim, should you call
cfg.require_nsim() ?

Reviewed-by: Breno Leitao <leitao@debian.org>