selftests: drv-net: store addresses in dict indexed by ipver

Looks like more and more tests want to iterate over IP version,
run the same test over ipv4 and ipv6. The current naming of
members in the env class makes it a bit awkward, we have
separate members for ipv4 and ipv6 parameters.

Store the parameters inside dicts, so that tests can easily
index them with ip version.

Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20250218225426.77726-4-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

tools/testing/selftests/drivers/net/hw/csum.py

@@ -9,15 +9,12 @@
 from lib.py import EthtoolFamily, NetDrvEpEnv
 from lib.py import bkg, cmd, wait_port_listen
 
-def test_receive(cfg, ipv4=False, extra_args=None):
+def test_receive(cfg, ipver="6", extra_args=None):
     """Test local nic checksum receive. Remote host sends crafted packets."""
     if not cfg.have_rx_csum:
         raise KsftSkipEx(f"Test requires rx checksum offload on {cfg.ifname}")
 
-    if ipv4:
-        ip_args = f"-4 -S {cfg.remote_v4} -D {cfg.v4}"
-    else:
-        ip_args = f"-6 -S {cfg.remote_v6} -D {cfg.v6}"
+    ip_args = f"-{ipver} -S {cfg.remote_addr_v[ipver]} -D {cfg.addr_v[ipver]}"
 
     rx_cmd = f"{cfg.bin_local} -i {cfg.ifname} -n 100 {ip_args} -r 1 -R {extra_args}"
     tx_cmd = f"{cfg.bin_remote} -i {cfg.ifname} -n 100 {ip_args} -r 1 -T {extra_args}"
@@ -27,17 +24,14 @@ def test_receive(cfg, ipv4=False, extra_args=None):
         cmd(tx_cmd, host=cfg.remote)
 
 
-def test_transmit(cfg, ipv4=False, extra_args=None):
+def test_transmit(cfg, ipver="6", extra_args=None):
     """Test local nic checksum transmit. Remote host verifies packets."""
     if (not cfg.have_tx_csum_generic and
-        not (cfg.have_tx_csum_ipv4 and ipv4) and
-        not (cfg.have_tx_csum_ipv6 and not ipv4)):
+        not (cfg.have_tx_csum_ipv4 and ipver == "4") and
+        not (cfg.have_tx_csum_ipv6 and ipver == "6")):
         raise KsftSkipEx(f"Test requires tx checksum offload on {cfg.ifname}")
 
-    if ipv4:
-        ip_args = f"-4 -S {cfg.v4} -D {cfg.remote_v4}"
-    else:
-        ip_args = f"-6 -S {cfg.v6} -D {cfg.remote_v6}"
+    ip_args = f"-{ipver} -S {cfg.addr_v[ipver]} -D {cfg.remote_addr_v[ipver]}"
 
     # Cannot randomize input when calculating zero checksum
     if extra_args != "-U -Z":
@@ -51,26 +45,20 @@ def test_transmit(cfg, ipv4=False, extra_args=None):
         cmd(tx_cmd)
 
 
-def test_builder(name, cfg, ipv4=False, tx=False, extra_args=""):
+def test_builder(name, cfg, ipver="6", tx=False, extra_args=""):
     """Construct specific tests from the common template.
 
        Most tests follow the same basic pattern, differing only in
        Direction of the test and optional flags passed to csum."""
     def f(cfg):
-        if ipv4:
-            cfg.require_v4()
-        else:
-            cfg.require_v6()
+        cfg.require_ipver(ipver)
 
         if tx:
-            test_transmit(cfg, ipv4, extra_args)
+            test_transmit(cfg, ipver, extra_args)
         else:
-            test_receive(cfg, ipv4, extra_args)
+            test_receive(cfg, ipver, extra_args)
 
-    if ipv4:
-        f.__name__ = "ipv4_" + name
-    else:
-        f.__name__ = "ipv6_" + name
+    f.__name__ = f"ipv{ipver}_" + name
     return f
 
 
@@ -104,15 +92,15 @@ def main() -> None:
         cfg.bin_remote = cfg.remote.deploy(cfg.bin_local)
 
         cases = []
-        for ipv4 in [True, False]:
-            cases.append(test_builder("rx_tcp", cfg, ipv4, False, "-t"))
-            cases.append(test_builder("rx_tcp_invalid", cfg, ipv4, False, "-t -E"))
+        for ipver in ["4", "6"]:
+            cases.append(test_builder("rx_tcp", cfg, ipver, False, "-t"))
+            cases.append(test_builder("rx_tcp_invalid", cfg, ipver, False, "-t -E"))
 
-            cases.append(test_builder("rx_udp", cfg, ipv4, False, ""))
-            cases.append(test_builder("rx_udp_invalid", cfg, ipv4, False, "-E"))
+            cases.append(test_builder("rx_udp", cfg, ipver, False, ""))
+            cases.append(test_builder("rx_udp_invalid", cfg, ipver, False, "-E"))
 
-            cases.append(test_builder("tx_udp_csum_offload", cfg, ipv4, True, "-U"))
-            cases.append(test_builder("tx_udp_zero_checksum", cfg, ipv4, True, "-U -Z"))
+            cases.append(test_builder("tx_udp_csum_offload", cfg, ipver, True, "-U"))
+            cases.append(test_builder("tx_udp_zero_checksum", cfg, ipver, True, "-U -Z"))
 
         ksft_run(cases=cases, args=(cfg, ))
     ksft_exit()

tools/testing/selftests/drivers/net/hw/devmem.py

@@ -21,15 +21,15 @@ def require_devmem(cfg):
 
 @ksft_disruptive
 def check_rx(cfg) -> None:
-    cfg.require_v6()
+    cfg.require_ipver("6")
     require_devmem(cfg)
 
     port = rand_port()
-    listen_cmd = f"./ncdevmem -l -f {cfg.ifname} -s {cfg.v6} -p {port}"
+    listen_cmd = f"./ncdevmem -l -f {cfg.ifname} -s {cfg.addr_v['6']} -p {port}"
 
     with bkg(listen_cmd) as socat:
         wait_port_listen(port)
-        cmd(f"echo -e \"hello\\nworld\"| socat -u - TCP6:[{cfg.v6}]:{port}", host=cfg.remote, shell=True)
+        cmd(f"echo -e \"hello\\nworld\"| socat -u - TCP6:[{cfg.addr_v['6']}]:{port}", host=cfg.remote, shell=True)
 
     ksft_eq(socat.stdout.strip(), "hello\nworld")
 

tools/testing/selftests/drivers/net/lib/py/env.py

@@ -113,17 +113,20 @@ def __init__(self, src_path, nsim_test=None):
         self._ns = None
         self._ns_peer = None
 
+        self.addr_v        = { "4": None, "6": None }
+        self.remote_addr_v = { "4": None, "6": None }
+
         if "NETIF" in self.env:
             if nsim_test is True:
                 raise KsftXfailEx("Test only works on netdevsim")
             self._check_env()
 
             self.dev = ip("-d link show dev " + self.env['NETIF'], json=True)[0]
 
-            self.v4 = self.env.get("LOCAL_V4")
-            self.v6 = self.env.get("LOCAL_V6")
-            self.remote_v4 = self.env.get("REMOTE_V4")
-            self.remote_v6 = self.env.get("REMOTE_V6")
+            self.addr_v["4"] = self.env.get("LOCAL_V4")
+            self.addr_v["6"] = self.env.get("LOCAL_V6")
+            self.remote_addr_v["4"] = self.env.get("REMOTE_V4")
+            self.remote_addr_v["6"] = self.env.get("REMOTE_V6")
             kind = self.env["REMOTE_TYPE"]
             args = self.env["REMOTE_ARGS"]
         else:
@@ -134,22 +137,22 @@ def __init__(self, src_path, nsim_test=None):
 
             self.dev = self._ns.nsims[0].dev
 
-            self.v4 = self.nsim_v4_pfx + "1"
-            self.v6 = self.nsim_v6_pfx + "1"
-            self.remote_v4 = self.nsim_v4_pfx + "2"
-            self.remote_v6 = self.nsim_v6_pfx + "2"
+            self.addr_v["4"] = self.nsim_v4_pfx + "1"
+            self.addr_v["6"] = self.nsim_v6_pfx + "1"
+            self.remote_addr_v["4"] = self.nsim_v4_pfx + "2"
+            self.remote_addr_v["6"] = self.nsim_v6_pfx + "2"
             kind = "netns"
             args = self._netns.name
 
         self.remote = Remote(kind, args, src_path)
 
-        self.addr = self.v6 if self.v6 else self.v4
-        self.remote_addr = self.remote_v6 if self.remote_v6 else self.remote_v4
+        self.addr_ipver = "6" if self.addr_v["6"] else "4"
+        self.addr = self.addr_v[self.addr_ipver]
+        self.remote_addr = self.remote_addr_v[self.addr_ipver]
 
-        self.addr_ipver = "6" if self.v6 else "4"
         # Bracketed addresses, some commands need IPv6 to be inside []
-        self.baddr = f"[{self.v6}]" if self.v6 else self.v4
-        self.remote_baddr = f"[{self.remote_v6}]" if self.remote_v6 else self.remote_v4
+        self.baddr = f"[{self.addr_v['6']}]" if self.addr_v["6"] else self.addr_v["4"]
+        self.remote_baddr = f"[{self.remote_addr_v['6']}]" if self.remote_addr_v["6"] else self.remote_addr_v["4"]
 
         self.ifname = self.dev['ifname']
         self.ifindex = self.dev['ifindex']
@@ -205,10 +208,10 @@ def _check_env(self):
 
     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 self.remote_addr_v["4"]:
+            v4 = ip("addr show to " + self.remote_addr_v["4"], json=True, host=self.remote)
+        if self.remote_addr_v["6"]:
+            v6 = ip("addr show to " + self.remote_addr_v["6"], 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):
@@ -238,13 +241,9 @@ def __del__(self):
             del self.remote
             self.remote = None
 
-    def require_v4(self):
-        if not self.v4 or not self.remote_v4:
-            raise KsftSkipEx("Test requires IPv4 connectivity")
-
-    def require_v6(self):
-        if not self.v6 or not self.remote_v6:
-            raise KsftSkipEx("Test requires IPv6 connectivity")
+    def require_ipver(self, ipver):
+        if not self.addr_v[ipver] or not self.remote_addr_v[ipver]:
+            raise KsftSkipEx(f"Test requires IPv{ipver} connectivity")
 
     def _require_cmd(self, comm, key, host=None):
         cached = self._required_cmd.get(comm, {})

tools/testing/selftests/drivers/net/ping.py

@@ -8,17 +8,17 @@
 
 
 def test_v4(cfg) -> None:
-    cfg.require_v4()
+    cfg.require_ipver("4")
 
-    cmd(f"ping -c 1 -W0.5 {cfg.remote_v4}")
-    cmd(f"ping -c 1 -W0.5 {cfg.v4}", host=cfg.remote)
+    cmd("ping -c 1 -W0.5 " + cfg.remote_addr_v["4"])
+    cmd("ping -c 1 -W0.5 " + cfg.addr_v["4"], host=cfg.remote)
 
 
 def test_v6(cfg) -> None:
-    cfg.require_v6()
+    cfg.require_ipver("6")
 
-    cmd(f"ping -c 1 -W0.5 {cfg.remote_v6}")
-    cmd(f"ping -c 1 -W0.5 {cfg.v6}", host=cfg.remote)
+    cmd("ping -c 1 -W0.5 " + cfg.remote_addr_v["6"])
+    cmd("ping -c 1 -W0.5 " + cfg.addr_v["6"], host=cfg.remote)
 
 
 def test_tcp(cfg) -> None: