Merge branch 'selftests-drv-net-fix-ping-py-test-failure'

Mohsin Bashir says:

====================
selftests: drv: net: fix `ping.py` test failure

Fix `ping.py` test failure on an ipv6 system, and appropriately handle the
cases where either one of the two address families (ipv4, ipv6) is not
present.
====================

Link: https://patch.msgid.link/20250503013518.1722913-1-mohsin.bashr@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: kuba-moo

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

@@ -9,19 +9,20 @@
 from lib.py import bkg, cmd, wait_port_listen, rand_port
 from lib.py import defer, ethtool, ip
 
-remote_ifname=""
 no_sleep=False
 
 def _test_v4(cfg) -> None:
-    cfg.require_ipver("4")
+    if not cfg.addr_v["4"]:
+        return
 
     cmd("ping -c 1 -W0.5 " + cfg.remote_addr_v["4"])
     cmd("ping -c 1 -W0.5 " + cfg.addr_v["4"], host=cfg.remote)
     cmd("ping -s 65000 -c 1 -W0.5 " + cfg.remote_addr_v["4"])
     cmd("ping -s 65000 -c 1 -W0.5 " + cfg.addr_v["4"], host=cfg.remote)
 
 def _test_v6(cfg) -> None:
-    cfg.require_ipver("6")
+    if not cfg.addr_v["6"]:
+        return
 
     cmd("ping -c 1 -W5 " + cfg.remote_addr_v["6"])
     cmd("ping -c 1 -W5 " + cfg.addr_v["6"], host=cfg.remote)
@@ -57,7 +58,7 @@ def _set_offload_checksum(cfg, netnl, on) -> None:
 
 def _set_xdp_generic_sb_on(cfg) -> None:
     prog = cfg.net_lib_dir / "xdp_dummy.bpf.o"
-    cmd(f"ip link set dev {remote_ifname} mtu 1500", shell=True, host=cfg.remote)
+    cmd(f"ip link set dev {cfg.remote_ifname} mtu 1500", shell=True, host=cfg.remote)
     cmd(f"ip link set dev {cfg.ifname} mtu 1500 xdpgeneric obj {prog} sec xdp", shell=True)
     defer(cmd, f"ip link set dev {cfg.ifname} xdpgeneric off")
 
@@ -66,8 +67,8 @@ def _set_xdp_generic_sb_on(cfg) -> None:
 
 def _set_xdp_generic_mb_on(cfg) -> None:
     prog = cfg.net_lib_dir / "xdp_dummy.bpf.o"
-    cmd(f"ip link set dev {remote_ifname} mtu 9000", shell=True, host=cfg.remote)
-    defer(ip, f"link set dev {remote_ifname} mtu 1500", host=cfg.remote)
+    cmd(f"ip link set dev {cfg.remote_ifname} mtu 9000", shell=True, host=cfg.remote)
+    defer(ip, f"link set dev {cfg.remote_ifname} mtu 1500", host=cfg.remote)
     ip("link set dev %s mtu 9000 xdpgeneric obj %s sec xdp.frags" % (cfg.ifname, prog))
     defer(ip, f"link set dev {cfg.ifname} mtu 1500 xdpgeneric off")
 
@@ -76,7 +77,7 @@ def _set_xdp_generic_mb_on(cfg) -> None:
 
 def _set_xdp_native_sb_on(cfg) -> None:
     prog = cfg.net_lib_dir / "xdp_dummy.bpf.o"
-    cmd(f"ip link set dev {remote_ifname} mtu 1500", shell=True, host=cfg.remote)
+    cmd(f"ip link set dev {cfg.remote_ifname} mtu 1500", shell=True, host=cfg.remote)
     cmd(f"ip -j link set dev {cfg.ifname} mtu 1500 xdp obj {prog} sec xdp", shell=True)
     defer(ip, f"link set dev {cfg.ifname} mtu 1500 xdp off")
     xdp_info = ip("-d link show %s" % (cfg.ifname), json=True)[0]
@@ -93,8 +94,8 @@ def _set_xdp_native_sb_on(cfg) -> None:
 
 def _set_xdp_native_mb_on(cfg) -> None:
     prog = cfg.net_lib_dir / "xdp_dummy.bpf.o"
-    cmd(f"ip link set dev {remote_ifname} mtu 9000", shell=True, host=cfg.remote)
-    defer(ip, f"link set dev {remote_ifname} mtu 1500", host=cfg.remote)
+    cmd(f"ip link set dev {cfg.remote_ifname} mtu 9000", shell=True, host=cfg.remote)
+    defer(ip, f"link set dev {cfg.remote_ifname} mtu 1500", host=cfg.remote)
     try:
         cmd(f"ip link set dev {cfg.ifname} mtu 9000 xdp obj {prog} sec xdp.frags", shell=True)
         defer(ip, f"link set dev {cfg.ifname} mtu 1500 xdp off")
@@ -112,18 +113,15 @@ def _set_xdp_offload_on(cfg) -> None:
     except Exception as e:
         raise KsftSkipEx('device does not support offloaded XDP')
     defer(ip, f"link set dev {cfg.ifname} xdpoffload off")
-    cmd(f"ip link set dev {remote_ifname} mtu 1500", shell=True, host=cfg.remote)
+    cmd(f"ip link set dev {cfg.remote_ifname} mtu 1500", shell=True, host=cfg.remote)
 
     if no_sleep != True:
         time.sleep(10)
 
 def get_interface_info(cfg) -> None:
-    global remote_ifname
     global no_sleep
 
-    remote_info = cmd(f"ip -4 -o addr show to {cfg.remote_addr_v['4']} | awk '{{print $2}}'", shell=True, host=cfg.remote).stdout
-    remote_ifname = remote_info.rstrip('\n')
-    if remote_ifname == "":
+    if cfg.remote_ifname == "":
         raise KsftFailEx('Can not get remote interface')
     local_info = ip("-d link show %s" % (cfg.ifname), json=True)[0]
     if 'parentbus' in local_info and local_info['parentbus'] == "netdevsim":
@@ -136,15 +134,25 @@ def set_interface_init(cfg) -> None:
     cmd(f"ip link set dev {cfg.ifname} xdp off ", shell=True)
     cmd(f"ip link set dev {cfg.ifname} xdpgeneric off ", shell=True)
     cmd(f"ip link set dev {cfg.ifname} xdpoffload off", shell=True)
-    cmd(f"ip link set dev {remote_ifname} mtu 1500", shell=True, host=cfg.remote)
+    cmd(f"ip link set dev {cfg.remote_ifname} mtu 1500", shell=True, host=cfg.remote)
+
+def test_default_v4(cfg, netnl) -> None:
+    cfg.require_ipver("4")
 
-def test_default(cfg, netnl) -> None:
     _set_offload_checksum(cfg, netnl, "off")
     _test_v4(cfg)
-    _test_v6(cfg)
     _test_tcp(cfg)
     _set_offload_checksum(cfg, netnl, "on")
     _test_v4(cfg)
+    _test_tcp(cfg)
+
+def test_default_v6(cfg, netnl) -> None:
+    cfg.require_ipver("6")
+
+    _set_offload_checksum(cfg, netnl, "off")
+    _test_v6(cfg)
+    _test_tcp(cfg)
+    _set_offload_checksum(cfg, netnl, "on")
     _test_v6(cfg)
     _test_tcp(cfg)
 
@@ -202,7 +210,8 @@ def main() -> None:
     with NetDrvEpEnv(__file__) as cfg:
         get_interface_info(cfg)
         set_interface_init(cfg)
-        ksft_run([test_default,
+        ksft_run([test_default_v4,
+                  test_default_v6,
                   test_xdp_generic_sb,
                   test_xdp_generic_mb,
                   test_xdp_native_sb,