From 2217bcb4914920f9b50175da583bd727caf6d927 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Tue, 18 Feb 2025 14:54:23 -0800 Subject: [PATCH] selftests: drv-net: resolve remote interface name Find out and record in env the name of the interface which remote host will use for the IP address provided via config. Interface name is useful for mausezahn and for setting up tunnels. Reviewed-by: Willem de Bruijn Reviewed-by: Petr Machata Link: https://patch.msgid.link/20250218225426.77726-2-kuba@kernel.org Signed-off-by: Jakub Kicinski --- tools/testing/selftests/drivers/net/lib/py/env.py | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/tools/testing/selftests/drivers/net/lib/py/env.py b/tools/testing/selftests/drivers/net/lib/py/env.py index 886b4904613c..55d6b3d992b6 100644 --- a/tools/testing/selftests/drivers/net/lib/py/env.py +++ b/tools/testing/selftests/drivers/net/lib/py/env.py @@ -154,6 +154,9 @@ def __init__(self, src_path, nsim_test=None): self.ifname = self.dev['ifname'] self.ifindex = self.dev['ifindex'] + # resolve remote interface name + self.remote_ifname = self.resolve_remote_ifc() + self._required_cmd = {} def create_local(self): @@ -200,6 +203,18 @@ def _check_env(self): raise Exception("Invalid environment, missing configuration:", missing, "Please see tools/testing/selftests/drivers/net/README.rst") + def resolve_remote_ifc(self): + v4 = v6 = None + if self.remote_v4: + v4 = ip("addr show to " + self.remote_v4, json=True, host=self.remote) + if self.remote_v6: + v6 = ip("addr show to " + self.remote_v6, json=True, host=self.remote) + if v4 and v6 and v4[0]["ifname"] != v6[0]["ifname"]: + raise Exception("Can't resolve remote interface name, v4 and v6 don't match") + if (v4 and len(v4) > 1) or (v6 and len(v6) > 1): + raise Exception("Can't resolve remote interface name, multiple interfaces match") + return v6[0]["ifname"] if v6 else v4[0]["ifname"] + def __enter__(self): return self