net: devmem: ksft: add 5 tuple FS support

ncdevmem supports drivers that are limited to either 3-tuple or 5-tuple
FS support, but the ksft is currently 3-tuple only. Support drivers that
have 5-tuple FS supported by adding a ksft arg.

Signed-off-by: Mina Almasry <almasrymina@google.com>

fix 5-tuple

fix 5-tuple
Acked-by: Stanislav Fomichev <sdf@fomichev.me>

Link: https://patch.msgid.link/20250523230524.1107879-7-almasrymina@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: mina

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

@@ -24,11 +24,11 @@ def check_rx(cfg) -> None:
     require_devmem(cfg)
 
     port = rand_port()
-    listen_cmd = f"{cfg.bin_local} -l -f {cfg.ifname} -s {cfg.addr} -p {port}"
+    listen_cmd = f"{cfg.bin_local} -l -f {cfg.ifname} -s {cfg.addr} -p {port} -c {cfg.remote_addr}"
 
     with bkg(listen_cmd, exit_wait=True) as ncdevmem:
         wait_port_listen(port)
-        cmd(f"echo -e \"hello\\nworld\"| socat -u - TCP{cfg.addr_ipver}:{cfg.addr}:{port}", host=cfg.remote, shell=True)
+        cmd(f"echo -e \"hello\\nworld\"| socat -u - TCP{cfg.addr_ipver}:{cfg.addr}:{port},bind={cfg.remote_addr}:{port}", host=cfg.remote, shell=True)
 
     ksft_eq(ncdevmem.stdout.strip(), "hello\nworld")
 

tools/testing/selftests/drivers/net/hw/ncdevmem.c

@@ -373,15 +373,26 @@ static int configure_flow_steering(struct sockaddr_in6 *server_sin)
 		server_addr = strrchr(server_addr, ':') + 1;
 	}
 
-	return run_command("sudo ethtool -N %s flow-type %s %s %s dst-ip %s %s %s dst-port %s queue %d >&2",
+	/* Try configure 5-tuple */
+	if (run_command("sudo ethtool -N %s flow-type %s %s %s dst-ip %s %s %s dst-port %s queue %d >&2",
 			   ifname,
 			   type,
 			   client_ip ? "src-ip" : "",
 			   client_ip ?: "",
 			   server_addr,
 			   client_ip ? "src-port" : "",
 			   client_ip ? port : "",
-			   port, start_queue);
+			   port, start_queue))
+		/* If that fails, try configure 3-tuple */
+		if (run_command("sudo ethtool -N %s flow-type %s dst-ip %s dst-port %s queue %d >&2",
+				ifname,
+				type,
+				server_addr,
+				port, start_queue))
+			/* If that fails, return error */
+			return -1;
+
+	return 0;
 }
 
 static int bind_rx_queue(unsigned int ifindex, unsigned int dmabuf_fd,