linux-kernel - [PATCH net v3 2/2] selftests: drv-net: rss

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Message-ID: <759870e430b7c93ecaae6e448f30a47284c59637.1732748253.git.dxu@dxuuu.xyz>
Date: Wed, 27 Nov 2024 15:58:30 -0700
From: Daniel Xu <dxu@...uu.xyz>
To: andrew+netdev@...n.ch,
	pabeni@...hat.com,
	davem@...emloft.net,
	edumazet@...gle.com,
	shuah@...nel.org,
	kuba@...nel.org,
	michael.chan@...adcom.com,
	martin.lau@...ux.dev,
	pavan.chebbi@...adcom.com,
	ecree.xilinx@...il.com
Cc: netdev@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	kernel-team@...a.com
Subject: [PATCH net v3 2/2] selftests: drv-net: rss_ctx: Add test for ntuple rule

Extend the rss_ctx test suite to test that an ntuple action that
redirects to an RSS context contains that information in `ethtool -n`.
Otherwise the output from ethtool is highly deceiving. This test helps
ensure drivers are compliant with the API.

Signed-off-by: Daniel Xu <dxu@...uu.xyz>
---
 tools/testing/selftests/drivers/net/hw/rss_ctx.py | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/drivers/net/hw/rss_ctx.py b/tools/testing/selftests/drivers/net/hw/rss_ctx.py
index 0b49ce7ae678..ca8a7edff3dd 100755
--- a/tools/testing/selftests/drivers/net/hw/rss_ctx.py
+++ b/tools/testing/selftests/drivers/net/hw/rss_ctx.py
@@ -3,7 +3,8 @@
 
 import datetime
 import random
-from lib.py import ksft_run, ksft_pr, ksft_exit, ksft_eq, ksft_ne, ksft_ge, ksft_lt
+import re
+from lib.py import ksft_run, ksft_pr, ksft_exit, ksft_eq, ksft_ne, ksft_ge, ksft_lt, ksft_true
 from lib.py import NetDrvEpEnv
 from lib.py import EthtoolFamily, NetdevFamily
 from lib.py import KsftSkipEx, KsftFailEx
@@ -96,6 +97,13 @@ def _send_traffic_check(cfg, port, name, params):
                 f"traffic on inactive queues ({name}): " + str(cnts))
 
 
+def _ntuple_rule_check(cfg, rule_id, ctx_id):
+    """Check that ntuple rule references RSS context ID"""
+    text = ethtool(f"-n {cfg.ifname} rule {rule_id}").stdout
+    pattern = f"RSS Context (ID: )?{ctx_id}"
+    ksft_true(re.search(pattern, text), "RSS context not referenced in ntuple rule")
+
+
 def test_rss_key_indir(cfg):
     """Test basics like updating the main RSS key and indirection table."""
 
@@ -459,6 +467,8 @@ def test_rss_context(cfg, ctx_cnt=1, create_with_cfg=None):
         ntuple = ethtool_create(cfg, "-N", flow)
         defer(ethtool, f"-N {cfg.ifname} delete {ntuple}")
 
+        _ntuple_rule_check(cfg, ntuple, ctx_id)
+
     for i in range(ctx_cnt):
         _send_traffic_check(cfg, ports[i], f"context {i}",
                             { 'target': (2+i*2, 3+i*2),
-- 
2.46.0