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selftests: drv-net: resolve remote interface name

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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 <willemb@google.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Link: https://patch.msgid.link/20250218225426.77726-2-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski
2025-02-18 14:54:23 -08:00
parent 22af030f01
commit 2217bcb491
1 changed files with 15 additions and 0 deletions
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15
tools/testing/selftests/drivers/net/lib/py/env.py
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@@ -154,6 +154,9 @@ class NetDrvEpEnv(NetDrvEnvBase):
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 @@ class NetDrvEpEnv(NetDrvEnvBase):
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