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Miller" , Eric Dumazet , Paolo Abeni , Simon Horman , Jan Stancek , "Matthieu Baerts (NGI0)" , =?UTF-8?q?Asbj=C3=B8rn=20Sloth=20T=C3=B8nnesen?= , Stanislav Fomichev , Ido Schimmel , Guillaume Nault , Sabrina Dubroca , Petr Machata , Hangbin Liu Subject: [PATCHv3 net-next 3/3] tools: ynl: add YNL test framework Date: Mon, 10 Nov 2025 10:00:00 +0000 Message-ID: <20251110100000.3837-4-liuhangbin@gmail.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20251110100000.3837-1-liuhangbin@gmail.com> References: <20251110100000.3837-1-liuhangbin@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add a test framework for YAML Netlink (YNL) tools, covering both CLI and ethtool functionality. The framework includes: 1) cli: family listing, netdev, ethtool, rt-* families, and nlctrl operations 2) ethtool: device info, statistics, ring/coalesce/pause parameters, and feature gettings The current YNL syntax is a bit obscure, and end users may not always know how to use it. This test framework provides usage examples and also serves as a regression test to catch potential breakages caused by future changes. Signed-off-by: Hangbin Liu --- tools/net/ynl/Makefile | 8 +- tools/net/ynl/tests/Makefile | 38 ++++ tools/net/ynl/tests/config | 6 + tools/net/ynl/tests/test_ynl_cli.sh | 291 ++++++++++++++++++++++++ tools/net/ynl/tests/test_ynl_ethtool.sh | 196 ++++++++++++++++ 5 files changed, 537 insertions(+), 2 deletions(-) create mode 100644 tools/net/ynl/tests/Makefile create mode 100644 tools/net/ynl/tests/config create mode 100755 tools/net/ynl/tests/test_ynl_cli.sh create mode 100755 tools/net/ynl/tests/test_ynl_ethtool.sh diff --git a/tools/net/ynl/Makefile b/tools/net/ynl/Makefile index 211df5a93ad9..8a328972564a 100644 --- a/tools/net/ynl/Makefile +++ b/tools/net/ynl/Makefile @@ -12,7 +12,7 @@ endif libdir ?= $(prefix)/$(libdir_relative) includedir ?= $(prefix)/include -SUBDIRS = lib generated samples +SUBDIRS = lib generated samples tests all: $(SUBDIRS) libynl.a @@ -48,5 +48,9 @@ install: libynl.a lib/*.h @echo -e "\tINSTALL pyynl" @pip install --prefix=$(DESTDIR)$(prefix) . @make -C generated install + @make -C tests install -.PHONY: all clean distclean install $(SUBDIRS) +run_tests: + @$(MAKE) -C tests run_tests + +.PHONY: all clean distclean install run_tests $(SUBDIRS) diff --git a/tools/net/ynl/tests/Makefile b/tools/net/ynl/tests/Makefile new file mode 100644 index 000000000000..4d527f9c3de9 --- /dev/null +++ b/tools/net/ynl/tests/Makefile @@ -0,0 +1,38 @@ +# SPDX-License-Identifier: GPL-2.0 +# Makefile for YNL tests + +TESTS := \ + test_ynl_cli.sh \ + test_ynl_ethtool.sh \ +# end of TESTS + +all: $(TESTS) + +run_tests: + @echo "Running YNL tests..." + @failed=0; \ + echo "Running test_ynl_cli.sh..."; \ + ./test_ynl_cli.sh || failed=$$(($$failed + 1)); \ + echo "Running test_ynl_ethtool.sh..."; \ + ./test_ynl_ethtool.sh || failed=$$(($$failed + 1)); \ + if [ $$failed -eq 0 ]; then \ + echo "All tests passed!"; \ + else \ + echo "$$failed test(s) failed!"; \ + exit 1; \ + fi + +install: $(TESTS) + @mkdir -p $(DESTDIR)/usr/bin + @for test in $(TESTS); do \ + name=$$(basename $$test .sh); \ + sed -e 's|^ynl=.*|ynl="ynl"|' \ + -e 's|^ynl_ethtool=.*|ynl_ethtool="ynl-ethtool"|' \ + $$test > $(DESTDIR)/usr/bin/$$name; \ + chmod +x $(DESTDIR)/usr/bin/$$name; \ + done + +clean: + @# Nothing to clean + +.PHONY: all install clean run_tests diff --git a/tools/net/ynl/tests/config b/tools/net/ynl/tests/config new file mode 100644 index 000000000000..339f1309c03f --- /dev/null +++ b/tools/net/ynl/tests/config @@ -0,0 +1,6 @@ +CONFIG_DUMMY=m +CONFIG_INET_DIAG=y +CONFIG_IPV6=y +CONFIG_NET_NS=y +CONFIG_NETDEVSIM=m +CONFIG_VETH=m diff --git a/tools/net/ynl/tests/test_ynl_cli.sh b/tools/net/ynl/tests/test_ynl_cli.sh new file mode 100755 index 000000000000..5cc0624ffaad --- /dev/null +++ b/tools/net/ynl/tests/test_ynl_cli.sh @@ -0,0 +1,291 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Test YNL CLI functionality + +# Default ynl path for direct execution, can be overridden by make install +ynl="../pyynl/cli.py" + +readonly NSIM_ID="1338" +readonly NSIM_DEV_NAME="nsim${NSIM_ID}" +readonly VETH_A="veth_a" +readonly VETH_B="veth_b" + +testns="ynl-$(mktemp -u XXXXXX)" + +# Test listing available families +cli_list_families() { + if $ynl --list-families &>/dev/null; then + echo "PASS: YNL CLI list families" + else + echo "FAIL: YNL CLI list families" + fi +} + +# Test netdev family operations (dev-get, queue-get) +cli_netdev_ops() { + local dev_output + local ifindex + + ifindex=$(ip netns exec "$testns" cat /sys/class/net/"$NSIM_DEV_NAME"/ifindex 2>/dev/null) + if [[ -z "$ifindex" ]]; then + echo "FAIL: YNL CLI netdev operations (failed to get ifindex)" + return + fi + + dev_output=$(ip netns exec "$testns" $ynl --family netdev \ + --do dev-get --json "{\"ifindex\": $ifindex}" 2>/dev/null) + + if ! echo "$dev_output" | grep -q "ifindex"; then + echo "FAIL: YNL CLI netdev operations (netdev dev-get output missing ifindex)" + return + fi + + if ! ip netns exec "$testns" $ynl --family netdev \ + --dump queue-get --json "{\"ifindex\": $ifindex}" &>/dev/null; then + echo "FAIL: YNL CLI netdev operations (failed to get netdev queue info)" + return + fi + + echo "PASS: YNL CLI netdev operations" +} + +# Test ethtool family operations (rings-get, linkinfo-get) +cli_ethtool_ops() { + local rings_output + local linkinfo_output + + rings_output=$(ip netns exec "$testns" $ynl --family ethtool \ + --do rings-get --json "{\"header\": {\"dev-name\": \"$NSIM_DEV_NAME\"}}" 2>/dev/null) + + if ! echo "$rings_output" | grep -q "header"; then + echo "FAIL: YNL CLI ethtool operations (ethtool rings-get output missing header)" + return + fi + + linkinfo_output=$(ip netns exec "$testns" $ynl --family ethtool \ + --do linkinfo-get --json "{\"header\": {\"dev-name\": \"$VETH_A\"}}" 2>/dev/null) + + if ! echo "$linkinfo_output" | grep -q "header"; then + echo "FAIL: YNL CLI ethtool operations (ethtool linkinfo-get output missing header)" + return + fi + + echo "PASS: YNL CLI ethtool operations" +} + +# Test rt-* family operations (route, addr, link, neigh, rule) +cli_rt_ops() { + local ifindex + + if ! $ynl --list-families 2>/dev/null | grep -q "rt-"; then + echo "SKIP: YNL CLI rt-* operations (no rt-* families available)" + return + fi + + ifindex=$(ip netns exec "$testns" cat /sys/class/net/"$NSIM_DEV_NAME"/ifindex 2>/dev/null) + if [[ -z "$ifindex" ]]; then + echo "FAIL: YNL CLI rt-* operations (failed to get ifindex)" + return + fi + + + # Test rt-route family + if $ynl --list-families 2>/dev/null | grep -q "rt-route"; then + # Add route: 192.0.2.0/24 dev $dev scope link + if ip netns exec "$testns" $ynl --family rt-route --do newroute --create \ + --json "{\"dst\": \"192.0.2.0\", \"oif\": $ifindex, \"rtm-dst-len\": 24, \"rtm-family\": 2, \"rtm-scope\": 253, \"rtm-type\": 1, \"rtm-protocol\": 3, \"rtm-table\": 254}" &>/dev/null; then + + local route_output + route_output=$(ip netns exec "$testns" $ynl --family rt-route --dump getroute 2>/dev/null) + if echo "$route_output" | grep -q "192.0.2.0"; then + echo "PASS: YNL CLI rt-route operations" + else + echo "FAIL: YNL CLI rt-route operations (failed to verify route)" + fi + + ip netns exec "$testns" $ynl --family rt-route --do delroute \ + --json "{\"dst\": \"192.0.2.0\", \"oif\": $ifindex, \"rtm-dst-len\": 24, \"rtm-family\": 2, \"rtm-scope\": 253, \"rtm-type\": 1, \"rtm-protocol\": 3, \"rtm-table\": 254}" &>/dev/null + else + echo "FAIL: YNL CLI rt-route operations (failed to add route)" + fi + else + echo "SKIP: YNL CLI rt-route operations (rt-route family not available)" + fi + + # Test rt-addr family + if $ynl --list-families 2>/dev/null | grep -q "rt-addr"; then + if ip netns exec "$testns" $ynl --family rt-addr --do newaddr \ + --json "{\"ifa-index\": $ifindex, \"local\": \"192.0.2.100\", \"ifa-prefixlen\": 24, \"ifa-family\": 2}" &>/dev/null; then + + local addr_output + addr_output=$(ip netns exec "$testns" $ynl --family rt-addr --dump getaddr 2>/dev/null) + if echo "$addr_output" | grep -q "192.0.2.100"; then + echo "PASS: YNL CLI rt-addr operations" + else + echo "FAIL: YNL CLI rt-addr operations (failed to verify address)" + fi + + ip netns exec "$testns" $ynl --family rt-addr --do deladdr \ + --json "{\"ifa-index\": $ifindex, \"local\": \"192.0.2.100\", \"ifa-prefixlen\": 24, \"ifa-family\": 2}" &>/dev/null + else + echo "FAIL: YNL CLI rt-addr operations (failed to add address)" + fi + else + echo "SKIP: YNL CLI rt-addr operations (rt-addr family not available)" + fi + + # Test rt-link family + if $ynl --list-families 2>/dev/null | grep -q "rt-link"; then + if ip netns exec "$testns" $ynl --family rt-link --do newlink --create \ + --json "{\"ifname\": \"dummy0\", \"linkinfo\": {\"kind\": \"dummy\"}}" &>/dev/null; then + + local link_output + link_output=$(ip netns exec "$testns" $ynl --family rt-link --dump getlink 2>/dev/null) + if echo "$link_output" | grep -q "$NSIM_DEV_NAME" && echo "$link_output" | grep -q "dummy0"; then + echo "PASS: YNL CLI rt-link operations" + else + echo "FAIL: YNL CLI rt-link operations (failed to verify link)" + fi + + ip netns exec "$testns" $ynl --family rt-link --do dellink \ + --json "{\"ifname\": \"dummy0\"}" &>/dev/null + else + echo "FAIL: YNL CLI rt-link operations (failed to add link)" + fi + else + echo "SKIP: YNL CLI rt-link operations (rt-link family not available)" + fi + + # Test rt-neigh family + if $ynl --list-families 2>/dev/null | grep -q "rt-neigh"; then + # Add neighbor: 192.0.2.1 dev nsim1338 lladdr 11:22:33:44:55:66 PERMANENT + if ip netns exec "$testns" $ynl --family rt-neigh --do newneigh --create \ + --json "{\"ndm-ifindex\": $ifindex, \"dst\": \"192.0.2.1\", \"lladdr\": \"11:22:33:44:55:66\", \"ndm-family\": 2, \"ndm-state\": 128}" &>/dev/null; then + + local neigh_output + neigh_output=$(ip netns exec "$testns" $ynl --family rt-neigh --dump getneigh 2>/dev/null) + if echo "$neigh_output" | grep -q "192.0.2.1"; then + echo "PASS: YNL CLI rt-neigh operations" + else + echo "FAIL: YNL CLI rt-neigh operations (failed to verify neighbor)" + fi + + ip netns exec "$testns" $ynl --family rt-neigh --do delneigh \ + --json "{\"ndm-ifindex\": $ifindex, \"dst\": \"192.0.2.1\", \"lladdr\": \"11:22:33:44:55:66\", \"ndm-family\": 2}" &>/dev/null + else + echo "FAIL: YNL CLI rt-neigh operations (failed to add neighbor)" + fi + else + echo "SKIP: YNL CLI rt-neigh operations (rt-neigh family not available)" + fi + + # Test rt-rule family + if $ynl --list-families 2>/dev/null | grep -q "rt-rule"; then + # Add rule: from 192.0.2.0/24 lookup 100 none + if ip netns exec "$testns" $ynl --family rt-rule --do newrule \ + --json "{\"family\": 2, \"src-len\": 24, \"src\": \"192.0.2.0\", \"table\": 100}" &>/dev/null; then + + local rule_output + rule_output=$(ip netns exec "$testns" $ynl --family rt-rule --dump getrule 2>/dev/null) + if echo "$rule_output" | grep -q "192.0.2.0"; then + echo "PASS: YNL CLI rt-rule operations" + else + echo "FAIL: YNL CLI rt-rule operations (failed to verify rule)" + fi + + ip netns exec "$testns" $ynl --family rt-rule --do delrule \ + --json "{\"family\": 2, \"src-len\": 24, \"src\": \"192.0.2.0\", \"table\": 100}" &>/dev/null + else + echo "FAIL: YNL CLI rt-rule operations (failed to add rule)" + fi + else + echo "SKIP: YNL CLI rt-rule operations (rt-rule family not available)" + fi + +} + +# Test nlctrl family operations +cli_nlctrl_ops() { + local family_output + + if ! family_output=$($ynl --family nlctrl \ + --do getfamily --json "{\"family-name\": \"netdev\"}" 2>/dev/null); then + echo "FAIL: YNL CLI nlctrl getfamily (failed to get nlctrl family info)" + return + fi + + if ! echo "$family_output" | grep -q "family-name"; then + echo "FAIL: YNL CLI nlctrl getfamily (nlctrl getfamily output missing family-name)" + return + fi + + if ! echo "$family_output" | grep -q "family-id"; then + echo "FAIL: YNL CLI nlctrl getfamily (nlctrl getfamily output missing family-id)" + return + fi + + echo "PASS: YNL CLI nlctrl getfamily" +} + +setup() { + modprobe netdevsim &> /dev/null + if ! [ -f /sys/bus/netdevsim/new_device ]; then + echo "SKIP: all YNL CLI tests (netdevsim module not available)" + exit 0 + fi + + if ! ip netns add "$testns" 2>/dev/null; then + echo "SKIP: all YNL CLI tests (failed to create test namespace)" + exit 0 + fi + + echo "$NSIM_ID 1" | ip netns exec "$testns" tee /sys/bus/netdevsim/new_device >/dev/null 2>&1 || { + echo "SKIP: all YNL CLI tests (failed to create netdevsim device)" + exit 0 + } + + local dev + dev=$(ip netns exec "$testns" ls /sys/bus/netdevsim/devices/netdevsim$NSIM_ID/net 2>/dev/null | head -1) + if [[ -z "$dev" ]]; then + echo "SKIP: all YNL CLI tests (failed to find netdevsim device)" + exit 0 + fi + + ip -netns "$testns" link set dev "$dev" name "$NSIM_DEV_NAME" 2>/dev/null || { + echo "SKIP: all YNL CLI tests (failed to rename netdevsim device)" + exit 0 + } + + ip -netns "$testns" link set dev "$NSIM_DEV_NAME" up 2>/dev/null + + if ! ip -n "$testns" link add "$VETH_A" type veth peer name "$VETH_B" 2>/dev/null; then + echo "SKIP: all YNL CLI tests (failed to create veth pair)" + exit 0 + fi + + ip -n "$testns" link set "$VETH_A" up 2>/dev/null + ip -n "$testns" link set "$VETH_B" up 2>/dev/null +} + +cleanup() { + if [[ -n "$testns" ]]; then + ip netns exec "$testns" bash -c "echo $NSIM_ID > /sys/bus/netdevsim/del_device" 2>/dev/null || true + ip netns del "$testns" 2>/dev/null || true + fi +} + +# Check if ynl command is available +if ! command -v $ynl &>/dev/null && [[ ! -x $ynl ]]; then + echo "SKIP: all YNL CLI tests (ynl command not found: $ynl)" + exit 0 +fi + +trap cleanup EXIT +setup + +# Run all tests +cli_list_families +cli_netdev_ops +cli_ethtool_ops +cli_rt_ops +cli_nlctrl_ops diff --git a/tools/net/ynl/tests/test_ynl_ethtool.sh b/tools/net/ynl/tests/test_ynl_ethtool.sh new file mode 100755 index 000000000000..1d1e06ff0dd0 --- /dev/null +++ b/tools/net/ynl/tests/test_ynl_ethtool.sh @@ -0,0 +1,196 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Test YNL ethtool functionality + +# Default ynl-ethtool path for direct execution, can be overridden by make install +ynl_ethtool="../pyynl/ethtool.py" + +readonly NSIM_ID="1337" +readonly NSIM_DEV_NAME="nsim${NSIM_ID}" +readonly VETH_A="veth_a" +readonly VETH_B="veth_b" + +testns="ynl-ethtool-$(mktemp -u XXXXXX)" + +# Uses veth device as netdevsim doesn't support basic ethtool device info +ethtool_device_info() { + local info_output + + info_output=$(ip netns exec "$testns" $ynl_ethtool "$VETH_A" 2>/dev/null) + + if ! echo "$info_output" | grep -q "Settings for"; then + echo "FAIL: YNL ethtool device info (device info output missing expected content)" + return + fi + + echo "PASS: YNL ethtool device info" +} + +ethtool_statistics() { + local stats_output + + stats_output=$(ip netns exec "$testns" $ynl_ethtool --statistics "$NSIM_DEV_NAME" 2>/dev/null) + + if ! echo "$stats_output" | grep -q -E "(NIC statistics|packets|bytes)"; then + echo "FAIL: YNL ethtool statistics (statistics output missing expected content)" + return + fi + + echo "PASS: YNL ethtool statistics" +} + +ethtool_ring_params() { + local ring_output + + ring_output=$(ip netns exec "$testns" $ynl_ethtool --show-ring "$NSIM_DEV_NAME" 2>/dev/null) + + if ! echo "$ring_output" | grep -q -E "(Ring parameters|RX|TX)"; then + echo "FAIL: YNL ethtool ring parameters (ring parameters output missing expected content)" + return + fi + + if ! ip netns exec "$testns" $ynl_ethtool --set-ring "$NSIM_DEV_NAME" rx 64 2>/dev/null; then + echo "FAIL: YNL ethtool ring parameters (set-ring command failed unexpectedly)" + return + fi + + echo "PASS: YNL ethtool ring parameters (show/set)" +} + +ethtool_coalesce_params() { + if ! ip netns exec "$testns" $ynl_ethtool --show-coalesce "$NSIM_DEV_NAME" &>/dev/null; then + echo "FAIL: YNL ethtool coalesce parameters (failed to get coalesce parameters)" + return + fi + + if ! ip netns exec "$testns" $ynl_ethtool --set-coalesce "$NSIM_DEV_NAME" rx-usecs 50 2>/dev/null; then + echo "FAIL: YNL ethtool coalesce parameters (set-coalesce command failed unexpectedly)" + return + fi + + echo "PASS: YNL ethtool coalesce parameters (show/set)" +} + +ethtool_pause_params() { + if ! ip netns exec "$testns" $ynl_ethtool --show-pause "$NSIM_DEV_NAME" &>/dev/null; then + echo "FAIL: YNL ethtool pause parameters (failed to get pause parameters)" + return + fi + + if ! ip netns exec "$testns" $ynl_ethtool --set-pause "$NSIM_DEV_NAME" tx 1 rx 1 2>/dev/null; then + echo "FAIL: YNL ethtool pause parameters (set-pause command failed unexpectedly)" + return + fi + + echo "PASS: YNL ethtool pause parameters (show/set)" +} + +ethtool_features_info() { + local features_output + + features_output=$(ip netns exec "$testns" $ynl_ethtool --show-features "$NSIM_DEV_NAME" 2>/dev/null) + + if ! echo "$features_output" | grep -q -E "(Features|offload)"; then + echo "FAIL: YNL ethtool features info (features output missing expected content)" + return + fi + + echo "PASS: YNL ethtool features info (show/set)" +} + +ethtool_channels_info() { + local channels_output + + channels_output=$(ip netns exec "$testns" $ynl_ethtool --show-channels "$NSIM_DEV_NAME" 2>/dev/null) + + if ! echo "$channels_output" | grep -q -E "(Channel|Combined|RX|TX)"; then + echo "FAIL: YNL ethtool channels info (channels output missing expected content)" + return + fi + + if ! ip netns exec "$testns" $ynl_ethtool --set-channels "$NSIM_DEV_NAME" combined-count 1 2>/dev/null; then + echo "FAIL: YNL ethtool channels info (set-channels command failed unexpectedly)" + return + fi + + echo "PASS: YNL ethtool channels info (show/set)" +} + +ethtool_time_stamping() { + local ts_output + + ts_output=$(ip netns exec "$testns" $ynl_ethtool --show-time-stamping "$NSIM_DEV_NAME" 2>/dev/null) + + if ! echo "$ts_output" | grep -q -E "(Time stamping|timestamping|SOF_TIMESTAMPING)"; then + echo "FAIL: YNL ethtool time stamping (time stamping output missing expected content)" + return + fi + + echo "PASS: YNL ethtool time stamping" +} + +setup() { + modprobe netdevsim &> /dev/null + if ! [ -f /sys/bus/netdevsim/new_device ]; then + echo "SKIP: all YNL ethtool tests (netdevsim module not available)" + exit 0 + fi + + if ! ip netns add "$testns" 2>/dev/null; then + echo "SKIP: all YNL ethtool tests (failed to create test namespace)" + exit 0 + fi + + echo "$NSIM_ID 1" | ip netns exec "$testns" tee /sys/bus/netdevsim/new_device >/dev/null 2>&1 || { + echo "SKIP: all YNL ethtool tests (failed to create netdevsim device)" + exit 0 + } + + local dev + dev=$(ip netns exec "$testns" ls /sys/bus/netdevsim/devices/netdevsim$NSIM_ID/net 2>/dev/null | head -1) + if [[ -z "$dev" ]]; then + echo "SKIP: all YNL ethtool tests (failed to find netdevsim device)" + exit 0 + fi + + ip -netns "$testns" link set dev "$dev" name "$NSIM_DEV_NAME" 2>/dev/null || { + echo "SKIP: all YNL ethtool tests (failed to rename netdevsim device)" + exit 0 + } + + ip -netns "$testns" link set dev "$NSIM_DEV_NAME" up 2>/dev/null + + if ! ip -n "$testns" link add "$VETH_A" type veth peer name "$VETH_B" 2>/dev/null; then + echo "SKIP: all YNL ethtool tests (failed to create veth pair)" + exit 0 + fi + + ip -n "$testns" link set "$VETH_A" up 2>/dev/null + ip -n "$testns" link set "$VETH_B" up 2>/dev/null +} + +cleanup() { + if [[ -n "$testns" ]]; then + ip netns exec "$testns" bash -c "echo $NSIM_ID > /sys/bus/netdevsim/del_device" 2>/dev/null || true + ip netns del "$testns" 2>/dev/null || true + fi +} + +# Check if ynl-ethtool command is available +if ! command -v $ynl_ethtool &>/dev/null && [[ ! -x $ynl_ethtool ]]; then + echo "SKIP: all YNL ethtool tests (ynl-ethtool command not found: $ynl_ethtool)" + exit 0 +fi + +trap cleanup EXIT +setup + +# Run all tests +ethtool_device_info +ethtool_statistics +ethtool_ring_params +ethtool_coalesce_params +ethtool_pause_params +ethtool_features_info +ethtool_channels_info +ethtool_time_stamping -- 2.50.1