Test fold/unfold of RSS indirection tables on channel changes using netdevsim:
- default table regenerates on channel change - periodic table folds on shrink and unfolds on grow - non-periodic table blocks channel reduction - non-default RSS context resizes on channel change - non-periodic non-default context blocks fold - table and channel count unchanged after failed reduction Signed-off-by: Björn Töpel <[email protected]> --- .../selftests/drivers/net/netdevsim/Makefile | 1 + .../drivers/net/netdevsim/ethtool-rss.sh | 123 ++++++++++++++++++ 2 files changed, 124 insertions(+) create mode 100755 tools/testing/selftests/drivers/net/netdevsim/ethtool-rss.sh diff --git a/tools/testing/selftests/drivers/net/netdevsim/Makefile b/tools/testing/selftests/drivers/net/netdevsim/Makefile index 1a228c5430f5..d764d08dff1a 100644 --- a/tools/testing/selftests/drivers/net/netdevsim/Makefile +++ b/tools/testing/selftests/drivers/net/netdevsim/Makefile @@ -8,6 +8,7 @@ TEST_PROGS := \ ethtool-features.sh \ ethtool-fec.sh \ ethtool-pause.sh \ + ethtool-rss.sh \ fib.sh \ fib_notifications.sh \ hw_stats_l3.sh \ diff --git a/tools/testing/selftests/drivers/net/netdevsim/ethtool-rss.sh b/tools/testing/selftests/drivers/net/netdevsim/ethtool-rss.sh new file mode 100755 index 000000000000..1c1876f888ba --- /dev/null +++ b/tools/testing/selftests/drivers/net/netdevsim/ethtool-rss.sh @@ -0,0 +1,123 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0-only +# +# Test RSS indirection table resize on channel count changes. +# Exercises ethtool_rxfh_indir_resize() and +# ethtool_rxfh_contexts_resize_all() via netdevsim. + +source ethtool-common.sh + +# Create device with 8 queues +NSIM_NETDEV=$(make_netdev 1 8) + +set -o pipefail + +# --- Test 1: Default table regenerates on channel change --- +s=$(ethtool --json -x $NSIM_NETDEV | jq '.[0]["rss-indirection-table"] | length') +check $? "$s" "128" # roundup_pow_of_two(8) * 16 = 128 + +ethtool -L $NSIM_NETDEV combined 2 +s=$(ethtool --json -x $NSIM_NETDEV | jq '.[0]["rss-indirection-table"] | length') +check $? "$s" "32" # roundup_pow_of_two(2) * 16 = 32 + +ethtool -L $NSIM_NETDEV combined 8 + +# --- Test 2: Periodic context 0 table folds on channel reduction --- +ethtool -X $NSIM_NETDEV equal 2 +s=$(ethtool --json -x $NSIM_NETDEV | jq '[.[0]["rss-indirection-table"][]] | max') +check $? "$s" "1" + +ethtool -L $NSIM_NETDEV combined 2 +s=$(ethtool --json -x $NSIM_NETDEV | jq '.[0]["rss-indirection-table"] | length') +check $? "$s" "32" +s=$(ethtool --json -x $NSIM_NETDEV | jq '[.[0]["rss-indirection-table"][]] | max') +check $? "$s" "1" + +# Grow back — should unfold +ethtool -L $NSIM_NETDEV combined 8 +s=$(ethtool --json -x $NSIM_NETDEV | jq '.[0]["rss-indirection-table"] | length') +check $? "$s" "128" +s=$(ethtool --json -x $NSIM_NETDEV | jq '[.[0]["rss-indirection-table"][]] | max') +check $? "$s" "1" + +ethtool -X $NSIM_NETDEV default + +# --- Test 3: Non-periodic context 0 table blocks fold --- +ethtool -X $NSIM_NETDEV equal 8 + +ethtool -L $NSIM_NETDEV combined 2 2>/dev/null +if [ $? -ne 0 ]; then + ((num_passes++)) +else + echo "Expected channel reduction to fail with non-periodic table" + ((num_errors++)) +fi + +ethtool -X $NSIM_NETDEV default + +# --- Test 4: Non-default context resizes on channel change --- +ctx_id=$(ethtool -X $NSIM_NETDEV context new equal 2 2>/dev/null | awk '{print $NF}') +if [ -z "$ctx_id" ]; then + echo "SKIP: context creation failed" +else + s=$(ethtool --json -x $NSIM_NETDEV context $ctx_id | jq '.[0]["rss-indirection-table"] | length') + check $? "$s" "128" + + ethtool -L $NSIM_NETDEV combined 2 + s=$(ethtool --json -x $NSIM_NETDEV context $ctx_id | jq '.[0]["rss-indirection-table"] | length') + check $? "$s" "32" + s=$(ethtool --json -x $NSIM_NETDEV context $ctx_id | jq '[.[0]["rss-indirection-table"][]] | max') + check $? "$s" "1" + + # Grow back + ethtool -L $NSIM_NETDEV combined 8 + s=$(ethtool --json -x $NSIM_NETDEV context $ctx_id | jq '.[0]["rss-indirection-table"] | length') + check $? "$s" "128" + s=$(ethtool --json -x $NSIM_NETDEV context $ctx_id | jq '[.[0]["rss-indirection-table"][]] | max') + check $? "$s" "1" + + ethtool -X $NSIM_NETDEV context $ctx_id delete +fi + +# --- Test 5: Non-periodic non-default context blocks fold --- +ctx_id=$(ethtool -X $NSIM_NETDEV context new equal 8 2>/dev/null | awk '{print $NF}') +if [ -z "$ctx_id" ]; then + echo "SKIP: context creation failed" +else + ethtool -L $NSIM_NETDEV combined 2 2>/dev/null + if [ $? -ne 0 ]; then + ((num_passes++)) + else + echo "Expected channel reduction to fail with non-periodic context" + ((num_errors++)) + fi + + ethtool -X $NSIM_NETDEV context $ctx_id delete +fi + +# --- Test 6: Table unchanged after failed channel reduction --- +ethtool -X $NSIM_NETDEV equal 8 +s_before=$(ethtool --json -x $NSIM_NETDEV | jq '.[0]["rss-indirection-table"]') + +ethtool -L $NSIM_NETDEV combined 2 2>/dev/null +s_after=$(ethtool --json -x $NSIM_NETDEV | jq '.[0]["rss-indirection-table"]') +check $? "$s_after" "$s_before" + +ethtool -X $NSIM_NETDEV default + +# --- Test 7: Channel count unchanged after failed reduction --- +ethtool -X $NSIM_NETDEV equal 8 +ethtool -L $NSIM_NETDEV combined 2 2>/dev/null +s=$(ethtool --json -l $NSIM_NETDEV | jq '.[0]["combined-count"]') +check $? "$s" "8" + +ethtool -X $NSIM_NETDEV default + +# --- Results --- +if [ $num_errors -eq 0 ]; then + echo "PASSED all $((num_passes)) checks" + exit 0 +else + echo "FAILED $num_errors/$((num_errors+num_passes)) checks" + exit 1 +fi -- 2.53.0
