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>

2 files changed, 6 insertions, 6 deletions

diff --git a/tools/testing/selftests/net/lib/py/nsim.py b/tools/testing/selftests/net/lib/py/nsim.py
index 06896cdf7c18..f571a8b3139b 100644
--- a/tools/testing/selftests/net/lib/py/nsim.py
+++ b/tools/testing/selftests/net/lib/py/nsim.py
@@ -49,7 +49,7 @@ class NetdevSimDev:
         with open(fullpath, "w") as f:
             f.write(val)
 
-    def __init__(self, port_count=1, ns=None):
+    def __init__(self, port_count=1, queue_count=1, ns=None):
         # nsim will spawn in init_net, we'll set to actual ns once we switch it there
         self.ns = None
 
@@ -59,7 +59,7 @@ class NetdevSimDev:
         addr = random.randrange(1 << 15)
         while True:
             try:
-                self.ctrl_write("new_device", "%u %u" % (addr, port_count))
+                self.ctrl_write("new_device", "%u %u %u" % (addr, port_count, queue_count))
             except OSError as e:
                 if e.errno == errno.ENOSPC:
                     addr = random.randrange(1 << 15)
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()