6.15-stable review patch. If anyone has any objections, please let me know.
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From: Daniel Zahka daniel.zahka@gmail.com
[ Upstream commit 266b835e5e84a0f8fec7fd988ee81925890e8d89 ]
tso.py uses the active features at the time of test execution as the set of available gso features to test. This means if a gso feature is supported but toggled off at test start, the test will be skipped with a "Device does not support {feature}" message.
Instead, we can enumerate the set of toggleable features by capturing the driver's hw_features bitmap. To avoid configuration side-effects from running the test, we also snapshot the wanted_features flag set before making any feature changes, and then attempt to restore the same set of wanted_features before test exit.
Fixes: 0d0f4174f6c8 ("selftests: drv-net: add a simple TSO test") Signed-off-by: Daniel Zahka daniel.zahka@gmail.com Link: https://patch.msgid.link/20250723184740.4075410-2-daniel.zahka@gmail.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- tools/testing/selftests/drivers/net/hw/tso.py | 52 ++++++++++++++----- 1 file changed, 40 insertions(+), 12 deletions(-)
diff --git a/tools/testing/selftests/drivers/net/hw/tso.py b/tools/testing/selftests/drivers/net/hw/tso.py index 3370827409aa..f8386e3d88cd 100755 --- a/tools/testing/selftests/drivers/net/hw/tso.py +++ b/tools/testing/selftests/drivers/net/hw/tso.py @@ -119,15 +119,30 @@ def build_tunnel(cfg, outer_ipver, tun_info): return remote_v4, remote_v6
+def restore_wanted_features(cfg): + features_cmd = "" + for feature in cfg.hw_features: + setting = "on" if feature in cfg.wanted_features else "off" + features_cmd += f" {feature} {setting}" + try: + ethtool(f"-K {cfg.ifname} {features_cmd}") + except Exception as e: + ksft_pr(f"WARNING: failure restoring wanted features: {e}") + + def test_builder(name, cfg, outer_ipver, feature, tun=None, inner_ipver=None): """Construct specific tests from the common template.""" def f(cfg): cfg.require_ipver(outer_ipver) + defer(restore_wanted_features, cfg)
if not cfg.have_stat_super_count and \ not cfg.have_stat_wire_count: raise KsftSkipEx(f"Device does not support LSO queue stats")
+ if feature not in cfg.hw_features: + raise KsftSkipEx(f"Device does not support {feature}") + ipver = outer_ipver if tun: remote_v4, remote_v6 = build_tunnel(cfg, ipver, tun) @@ -138,12 +153,12 @@ def test_builder(name, cfg, outer_ipver, feature, tun=None, inner_ipver=None):
tun_partial = tun and tun[1] # Tunnel which can silently fall back to gso-partial - has_gso_partial = tun and 'tx-gso-partial' in cfg.features + has_gso_partial = tun and 'tx-gso-partial' in cfg.hw_features
# For TSO4 via partial we need mangleid if ipver == "4" and feature in cfg.partial_features: ksft_pr("Testing with mangleid enabled") - if 'tx-tcp-mangleid-segmentation' not in cfg.features: + if 'tx-tcp-mangleid-segmentation' not in cfg.hw_features: ethtool(f"-K {cfg.ifname} tx-tcp-mangleid-segmentation on") defer(ethtool, f"-K {cfg.ifname} tx-tcp-mangleid-segmentation off")
@@ -161,11 +176,8 @@ def test_builder(name, cfg, outer_ipver, feature, tun=None, inner_ipver=None): should_lso=tun_partial)
# Full feature enabled. - if feature in cfg.features: - ethtool(f"-K {cfg.ifname} {feature} on") - run_one_stream(cfg, ipver, remote_v4, remote_v6, should_lso=True) - else: - raise KsftXfailEx(f"Device does not support {feature}") + ethtool(f"-K {cfg.ifname} {feature} on") + run_one_stream(cfg, ipver, remote_v4, remote_v6, should_lso=True)
f.__name__ = name + ((outer_ipver + "_") if tun else "") + "ipv" + inner_ipver return f @@ -176,23 +188,39 @@ def query_nic_features(cfg) -> None: cfg.have_stat_super_count = False cfg.have_stat_wire_count = False
- cfg.features = set() features = cfg.ethnl.features_get({"header": {"dev-index": cfg.ifindex}}) - for f in features["active"]["bits"]["bit"]: - cfg.features.add(f["name"]) + + cfg.wanted_features = set() + for f in features["wanted"]["bits"]["bit"]: + cfg.wanted_features.add(f["name"]) + + cfg.hw_features = set() + hw_all_features_cmd = "" + for f in features["hw"]["bits"]["bit"]: + if f.get("value", False): + feature = f["name"] + cfg.hw_features.add(feature) + hw_all_features_cmd += f" {feature} on" + try: + ethtool(f"-K {cfg.ifname} {hw_all_features_cmd}") + except Exception as e: + ksft_pr(f"WARNING: failure enabling all hw features: {e}") + ksft_pr("partial gso feature detection may be impacted")
# Check which features are supported via GSO partial cfg.partial_features = set() - if 'tx-gso-partial' in cfg.features: + if 'tx-gso-partial' in cfg.hw_features: ethtool(f"-K {cfg.ifname} tx-gso-partial off")
no_partial = set() features = cfg.ethnl.features_get({"header": {"dev-index": cfg.ifindex}}) for f in features["active"]["bits"]["bit"]: no_partial.add(f["name"]) - cfg.partial_features = cfg.features - no_partial + cfg.partial_features = cfg.hw_features - no_partial ethtool(f"-K {cfg.ifname} tx-gso-partial on")
+ restore_wanted_features(cfg) + stats = cfg.netnl.qstats_get({"ifindex": cfg.ifindex}, dump=True) if stats: if 'tx-hw-gso-packets' in stats[0]: