net: selftest: add test for netdev netlink queue-get API

Add a selftest for netdev generic netlink. For now there is only a
single test that exercises the `queue-get` API.

The test works with netdevsim by default or with a real device by
setting NETIF.

Add a timeout param to cmd() since ethtool -L can take a long time on
real devices.

Signed-off-by: David Wei <dw@davidwei.uk>
Link: https://lore.kernel.org/r/20240507163228.2066817-3-dw@davidwei.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/tools/testing/selftests/net/lib/py/utils.py b/tools/testing/selftests/net/lib/py/utils.py
index ec8b086b4fcb..0540ea24921d 100644
--- a/tools/testing/selftests/net/lib/py/utils.py
+++ b/tools/testing/selftests/net/lib/py/utils.py
@@ -8,7 +8,7 @@ import time
 
 
 class cmd:
-    def __init__(self, comm, shell=True, fail=True, ns=None, background=False, host=None):
+    def __init__(self, comm, shell=True, fail=True, ns=None, background=False, host=None, timeout=5):
         if ns:
             comm = f'ip netns exec {ns} ' + comm
 
@@ -23,15 +23,15 @@ class cmd:
             self.proc = subprocess.Popen(comm, shell=shell, stdout=subprocess.PIPE,
                                          stderr=subprocess.PIPE)
         if not background:
-            self.process(terminate=False, fail=fail)
+            self.process(terminate=False, fail=fail, timeout=timeout)
 
-    def process(self, terminate=True, fail=None):
+    def process(self, terminate=True, fail=None, timeout=5):
         if fail is None:
             fail = not terminate
 
         if terminate:
             self.proc.terminate()
-        stdout, stderr = self.proc.communicate(timeout=5)
+        stdout, stderr = self.proc.communicate(timeout)
         self.stdout = stdout.decode("utf-8")
         self.stderr = stderr.decode("utf-8")
         self.proc.stdout.close()