]> git.ipfire.org Git - thirdparty/kernel/linux.git/commitdiff
tools: ynl: add YNL test framework
authorHangbin Liu <liuhangbin@gmail.com>
Mon, 24 Nov 2025 02:20:55 +0000 (02:20 +0000)
committerJakub Kicinski <kuba@kernel.org>
Thu, 27 Nov 2025 01:58:49 +0000 (17:58 -0800)
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.

Reviewed-by: Donald Hunter <donald.hunter@gmail.com>
Acked-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Link: https://patch.msgid.link/20251124022055.33389-1-liuhangbin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
tools/net/ynl/Makefile
tools/net/ynl/tests/Makefile [new file with mode: 0644]
tools/net/ynl/tests/config [new file with mode: 0644]
tools/net/ynl/tests/test_ynl_cli.sh [new file with mode: 0755]
tools/net/ynl/tests/test_ynl_ethtool.sh [new file with mode: 0755]

index 31ed20c0f3f8a380dfbed8ff571bc5e4841efddd..a40591e513b73dca212a5cbe51cdb0c7dcd2a876 100644 (file)
@@ -12,7 +12,7 @@ endif
 libdir  ?= $(prefix)/$(libdir_relative)
 includedir ?= $(prefix)/include
 
-SUBDIRS = lib generated samples ynltool
+SUBDIRS = lib generated samples ynltool tests
 
 all: $(SUBDIRS) libynl.a
 
@@ -49,5 +49,9 @@ 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 (file)
index 0000000..c1df2e0
--- /dev/null
@@ -0,0 +1,32 @@
+# 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:
+       @for test in $(TESTS); do \
+               ./$$test; \
+       done
+
+install: $(TESTS)
+       @mkdir -p $(DESTDIR)/usr/bin
+       @mkdir -p $(DESTDIR)/usr/share/kselftest
+       @cp ../../../testing/selftests/kselftest/ktap_helpers.sh $(DESTDIR)/usr/share/kselftest/
+       @for test in $(TESTS); do \
+               name=$$(basename $$test .sh); \
+               sed -e 's|^ynl=.*|ynl="ynl"|' \
+                   -e 's|^ynl_ethtool=.*|ynl_ethtool="ynl-ethtool"|' \
+                   -e 's|KSELFTEST_KTAP_HELPERS=.*|KSELFTEST_KTAP_HELPERS="/usr/share/kselftest/ktap_helpers.sh"|' \
+                   $$test > $(DESTDIR)/usr/bin/$$name; \
+               chmod +x $(DESTDIR)/usr/bin/$$name; \
+       done
+
+clean distclean:
+       @# 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 (file)
index 0000000..339f130
--- /dev/null
@@ -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 (executable)
index 0000000..7c0722a
--- /dev/null
@@ -0,0 +1,327 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Test YNL CLI functionality
+
+# Load KTAP test helpers
+KSELFTEST_KTAP_HELPERS="$(dirname "$(realpath "$0")")/../../../testing/selftests/kselftest/ktap_helpers.sh"
+# shellcheck source=../../../testing/selftests/kselftest/ktap_helpers.sh
+source "$KSELFTEST_KTAP_HELPERS"
+
+# 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)"
+TESTS_NO=0
+
+# Test listing available families
+cli_list_families()
+{
+       if $ynl --list-families &>/dev/null; then
+               ktap_test_pass "YNL CLI list families"
+       else
+               ktap_test_fail "YNL CLI list families"
+       fi
+}
+TESTS_NO=$((TESTS_NO + 1))
+
+# 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/"$NSIM_DEV_NAME"/ifindex 2>/dev/null)
+
+       dev_output=$(ip netns exec "$testns" $ynl --family netdev \
+               --do dev-get --json "{\"ifindex\": $ifindex}" 2>/dev/null)
+
+       if ! echo "$dev_output" | grep -q "ifindex"; then
+               ktap_test_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\": $ifindex}" &>/dev/null; then
+               ktap_test_fail "YNL CLI netdev operations (failed to get netdev queue info)"
+               return
+       fi
+
+       ktap_test_pass "YNL CLI netdev operations"
+}
+TESTS_NO=$((TESTS_NO + 1))
+
+# 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 "$rings_output" | grep -q "header"; then
+               ktap_test_fail "YNL CLI ethtool operations (ethtool rings-get output missing header)"
+               return
+       fi
+
+       linkinfo_output=$(ip netns exec "$testns" $ynl --family ethtool \
+               --do linkinfo-get --json "{\"header\": {\"dev-name\": \"$VETH_A\"}}" 2>/dev/null)
+
+       if ! echo "$linkinfo_output" | grep -q "header"; then
+               ktap_test_fail "YNL CLI ethtool operations (ethtool linkinfo-get output missing header)"
+               return
+       fi
+
+       ktap_test_pass "YNL CLI ethtool operations"
+}
+TESTS_NO=$((TESTS_NO + 1))
+
+# Test rt-route family operations
+cli_rt_route_ops()
+{
+       local ifindex
+
+       if ! $ynl --list-families 2>/dev/null | grep -q "rt-route"; then
+               ktap_test_skip "YNL CLI rt-route operations (rt-route family not available)"
+               return
+       fi
+
+       ifindex=$(ip netns exec "$testns" cat /sys/class/net/"$NSIM_DEV_NAME"/ifindex 2>/dev/null)
+
+       # 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\": $ifindex, \"rtm-dst-len\": 24, \"rtm-family\": 2, \"rtm-scope\": 253, \"rtm-type\": 1, \"rtm-protocol\": 3, \"rtm-table\": 254}" &>/dev/null; then
+               ktap_test_fail "YNL CLI rt-route operations (failed to add route)"
+               return
+       fi
+
+       local route_output
+       route_output=$(ip netns exec "$testns" $ynl --family rt-route --dump getroute 2>/dev/null)
+       if echo "$route_output" | grep -q "192.0.2.0"; then
+               ktap_test_pass "YNL CLI rt-route operations"
+       else
+               ktap_test_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\": $ifindex, \"rtm-dst-len\": 24, \"rtm-family\": 2, \"rtm-scope\": 253, \"rtm-type\": 1, \"rtm-protocol\": 3, \"rtm-table\": 254}" &>/dev/null
+}
+TESTS_NO=$((TESTS_NO + 1))
+
+# Test rt-addr family operations
+cli_rt_addr_ops()
+{
+       local ifindex
+
+       if ! $ynl --list-families 2>/dev/null | grep -q "rt-addr"; then
+               ktap_test_skip "YNL CLI rt-addr operations (rt-addr family not available)"
+               return
+       fi
+
+       ifindex=$(ip netns exec "$testns" cat /sys/class/net/"$NSIM_DEV_NAME"/ifindex 2>/dev/null)
+
+       if ! ip netns exec "$testns" $ynl --family rt-addr --do newaddr \
+               --json "{\"ifa-index\": $ifindex, \"local\": \"192.0.2.100\", \"ifa-prefixlen\": 24, \"ifa-family\": 2}" &>/dev/null; then
+               ktap_test_fail "YNL CLI rt-addr operations (failed to add address)"
+               return
+       fi
+
+       local addr_output
+       addr_output=$(ip netns exec "$testns" $ynl --family rt-addr --dump getaddr 2>/dev/null)
+       if echo "$addr_output" | grep -q "192.0.2.100"; then
+               ktap_test_pass "YNL CLI rt-addr operations"
+       else
+               ktap_test_fail "YNL CLI rt-addr operations (failed to verify address)"
+       fi
+
+       ip netns exec "$testns" $ynl --family rt-addr --do deladdr \
+               --json "{\"ifa-index\": $ifindex, \"local\": \"192.0.2.100\", \"ifa-prefixlen\": 24, \"ifa-family\": 2}" &>/dev/null
+}
+TESTS_NO=$((TESTS_NO + 1))
+
+# Test rt-link family operations
+cli_rt_link_ops()
+{
+       if ! $ynl --list-families 2>/dev/null | grep -q "rt-link"; then
+               ktap_test_skip "YNL CLI rt-link operations (rt-link family not available)"
+               return
+       fi
+
+       if ! ip netns exec "$testns" $ynl --family rt-link --do newlink --create \
+               --json "{\"ifname\": \"dummy0\", \"linkinfo\": {\"kind\": \"dummy\"}}" &>/dev/null; then
+               ktap_test_fail "YNL CLI rt-link operations (failed to add link)"
+               return
+       fi
+
+       local link_output
+       link_output=$(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
+               ktap_test_pass "YNL CLI rt-link operations"
+       else
+               ktap_test_fail "YNL CLI rt-link operations (failed to verify link)"
+       fi
+
+       ip netns exec "$testns" $ynl --family rt-link --do dellink \
+               --json "{\"ifname\": \"dummy0\"}" &>/dev/null
+}
+TESTS_NO=$((TESTS_NO + 1))
+
+# Test rt-neigh family operations
+cli_rt_neigh_ops()
+{
+       local ifindex
+
+       if ! $ynl --list-families 2>/dev/null | grep -q "rt-neigh"; then
+               ktap_test_skip "YNL CLI rt-neigh operations (rt-neigh family not available)"
+               return
+       fi
+
+       ifindex=$(ip netns exec "$testns" cat /sys/class/net/"$NSIM_DEV_NAME"/ifindex 2>/dev/null)
+
+       # 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\": $ifindex, \"dst\": \"192.0.2.1\", \"lladdr\": \"11:22:33:44:55:66\", \"ndm-family\": 2, \"ndm-state\": 128}" &>/dev/null; then
+               ktap_test_fail "YNL CLI rt-neigh operations (failed to add neighbor)"
+       fi
+
+       local neigh_output
+       neigh_output=$(ip netns exec "$testns" $ynl --family rt-neigh --dump getneigh 2>/dev/null)
+       if echo "$neigh_output" | grep -q "192.0.2.1"; then
+               ktap_test_pass "YNL CLI rt-neigh operations"
+       else
+               ktap_test_fail "YNL CLI rt-neigh operations (failed to verify neighbor)"
+       fi
+
+       ip netns exec "$testns" $ynl --family rt-neigh --do delneigh \
+               --json "{\"ndm-ifindex\": $ifindex, \"dst\": \"192.0.2.1\", \"lladdr\": \"11:22:33:44:55:66\", \"ndm-family\": 2}" &>/dev/null
+}
+TESTS_NO=$((TESTS_NO + 1))
+
+# Test rt-rule family operations
+cli_rt_rule_ops()
+{
+       if ! $ynl --list-families 2>/dev/null | grep -q "rt-rule"; then
+               ktap_test_skip "YNL CLI rt-rule operations (rt-rule family not available)"
+               return
+       fi
+
+       # Add rule: from 192.0.2.0/24 lookup 100 none
+       if ! ip netns exec "$testns" $ynl --family rt-rule --do newrule \
+               --json "{\"family\": 2, \"src-len\": 24, \"src\": \"192.0.2.0\", \"table\": 100}" &>/dev/null; then
+               ktap_test_fail "YNL CLI rt-rule operations (failed to add rule)"
+               return
+       fi
+
+       local rule_output
+       rule_output=$(ip netns exec "$testns" $ynl --family rt-rule --dump getrule 2>/dev/null)
+       if echo "$rule_output" | grep -q "192.0.2.0"; then
+               ktap_test_pass "YNL CLI rt-rule operations"
+       else
+               ktap_test_fail "YNL CLI rt-rule operations (failed to verify rule)"
+       fi
+
+       ip netns exec "$testns" $ynl --family rt-rule --do delrule \
+               --json "{\"family\": 2, \"src-len\": 24, \"src\": \"192.0.2.0\", \"table\": 100}" &>/dev/null
+}
+TESTS_NO=$((TESTS_NO + 1))
+
+# 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
+               ktap_test_fail "YNL CLI nlctrl getfamily (failed to get nlctrl family info)"
+               return
+       fi
+
+       if ! echo "$family_output" | grep -q "family-name"; then
+               ktap_test_fail "YNL CLI nlctrl getfamily (nlctrl getfamily output missing family-name)"
+               return
+       fi
+
+       if ! echo "$family_output" | grep -q "family-id"; then
+               ktap_test_fail "YNL CLI nlctrl getfamily (nlctrl getfamily output missing family-id)"
+               return
+       fi
+
+       ktap_test_pass "YNL CLI nlctrl getfamily"
+}
+TESTS_NO=$((TESTS_NO + 1))
+
+setup()
+{
+       modprobe netdevsim &> /dev/null
+       if ! [ -f /sys/bus/netdevsim/new_device ]; then
+               ktap_skip_all "netdevsim module not available"
+               exit "$KSFT_SKIP"
+       fi
+
+       if ! ip netns add "$testns" 2>/dev/null; then
+               ktap_skip_all "failed to create test namespace"
+               exit "$KSFT_SKIP"
+       fi
+
+       echo "$NSIM_ID 1" | ip netns exec "$testns" tee /sys/bus/netdevsim/new_device >/dev/null 2>&1 || {
+               ktap_skip_all "failed to create netdevsim device"
+               exit "$KSFT_SKIP"
+       }
+
+       local dev
+       dev=$(ip netns exec "$testns" ls /sys/bus/netdevsim/devices/netdevsim$NSIM_ID/net 2>/dev/null | head -1)
+       if [[ -z "$dev" ]]; then
+               ktap_skip_all "failed to find netdevsim device"
+               exit "$KSFT_SKIP"
+       fi
+
+       ip -netns "$testns" link set dev "$dev" name "$NSIM_DEV_NAME" 2>/dev/null || {
+               ktap_skip_all "failed to rename netdevsim device"
+               exit "$KSFT_SKIP"
+       }
+
+       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 "$VETH_B" 2>/dev/null; then
+               ktap_skip_all "failed to create veth pair"
+               exit "$KSFT_SKIP"
+       fi
+
+       ip -n "$testns" link set "$VETH_A" up 2>/dev/null
+       ip -n "$testns" link set "$VETH_B" up 2>/dev/null
+}
+
+cleanup()
+{
+       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
+}
+
+# Check if ynl command is available
+if ! command -v $ynl &>/dev/null && [[ ! -x $ynl ]]; then
+       ktap_skip_all "ynl command not found: $ynl"
+       exit "$KSFT_SKIP"
+fi
+
+trap cleanup EXIT
+
+ktap_print_header
+setup
+ktap_set_plan "${TESTS_NO}"
+
+cli_list_families
+cli_netdev_ops
+cli_ethtool_ops
+cli_rt_route_ops
+cli_rt_addr_ops
+cli_rt_link_ops
+cli_rt_neigh_ops
+cli_rt_rule_ops
+cli_nlctrl_ops
+
+ktap_finished
diff --git a/tools/net/ynl/tests/test_ynl_ethtool.sh b/tools/net/ynl/tests/test_ynl_ethtool.sh
new file mode 100755 (executable)
index 0000000..b826269
--- /dev/null
@@ -0,0 +1,222 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Test YNL ethtool functionality
+
+# Load KTAP test helpers
+KSELFTEST_KTAP_HELPERS="$(dirname "$(realpath "$0")")/../../../testing/selftests/kselftest/ktap_helpers.sh"
+# shellcheck source=../../../testing/selftests/kselftest/ktap_helpers.sh
+source "$KSELFTEST_KTAP_HELPERS"
+
+# 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)"
+TESTS_NO=0
+
+# 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 "$info_output" | grep -q "Settings for"; then
+               ktap_test_fail "YNL ethtool device info (device info output missing expected content)"
+               return
+       fi
+
+       ktap_test_pass "YNL ethtool device info"
+}
+TESTS_NO=$((TESTS_NO + 1))
+
+ethtool_statistics()
+{
+       local stats_output
+
+       stats_output=$(ip netns exec "$testns" $ynl_ethtool --statistics "$NSIM_DEV_NAME" 2>/dev/null)
+
+       if ! echo "$stats_output" | grep -q -E "(NIC statistics|packets|bytes)"; then
+               ktap_test_fail "YNL ethtool statistics (statistics output missing expected content)"
+               return
+       fi
+
+       ktap_test_pass "YNL ethtool statistics"
+}
+TESTS_NO=$((TESTS_NO + 1))
+
+ethtool_ring_params()
+{
+       local ring_output
+
+       ring_output=$(ip netns exec "$testns" $ynl_ethtool --show-ring "$NSIM_DEV_NAME" 2>/dev/null)
+
+       if ! echo "$ring_output" | grep -q -E "(Ring parameters|RX|TX)"; then
+               ktap_test_fail "YNL ethtool ring parameters (ring parameters output missing expected content)"
+               return
+       fi
+
+       if ! ip netns exec "$testns" $ynl_ethtool --set-ring "$NSIM_DEV_NAME" rx 64 2>/dev/null; then
+               ktap_test_fail "YNL ethtool ring parameters (set-ring command failed unexpectedly)"
+               return
+       fi
+
+       ktap_test_pass "YNL ethtool ring parameters (show/set)"
+}
+TESTS_NO=$((TESTS_NO + 1))
+
+ethtool_coalesce_params()
+{
+       if ! ip netns exec "$testns" $ynl_ethtool --show-coalesce "$NSIM_DEV_NAME" &>/dev/null; then
+               ktap_test_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
+               ktap_test_fail "YNL ethtool coalesce parameters (set-coalesce command failed unexpectedly)"
+               return
+       fi
+
+       ktap_test_pass "YNL ethtool coalesce parameters (show/set)"
+}
+TESTS_NO=$((TESTS_NO + 1))
+
+ethtool_pause_params()
+{
+       if ! ip netns exec "$testns" $ynl_ethtool --show-pause "$NSIM_DEV_NAME" &>/dev/null; then
+               ktap_test_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
+               ktap_test_fail "YNL ethtool pause parameters (set-pause command failed unexpectedly)"
+               return
+       fi
+
+       ktap_test_pass "YNL ethtool pause parameters (show/set)"
+}
+TESTS_NO=$((TESTS_NO + 1))
+
+ethtool_features_info()
+{
+       local features_output
+
+       features_output=$(ip netns exec "$testns" $ynl_ethtool --show-features "$NSIM_DEV_NAME" 2>/dev/null)
+
+       if ! echo "$features_output" | grep -q -E "(Features|offload)"; then
+               ktap_test_fail "YNL ethtool features info (features output missing expected content)"
+               return
+       fi
+
+       ktap_test_pass "YNL ethtool features info (show/set)"
+}
+TESTS_NO=$((TESTS_NO + 1))
+
+ethtool_channels_info()
+{
+       local channels_output
+
+       channels_output=$(ip netns exec "$testns" $ynl_ethtool --show-channels "$NSIM_DEV_NAME" 2>/dev/null)
+
+       if ! echo "$channels_output" | grep -q -E "(Channel|Combined|RX|TX)"; then
+               ktap_test_fail "YNL ethtool channels info (channels output missing expected content)"
+               return
+       fi
+
+       if ! ip netns exec "$testns" $ynl_ethtool --set-channels "$NSIM_DEV_NAME" combined-count 1 2>/dev/null; then
+               ktap_test_fail "YNL ethtool channels info (set-channels command failed unexpectedly)"
+               return
+       fi
+
+       ktap_test_pass "YNL ethtool channels info (show/set)"
+}
+TESTS_NO=$((TESTS_NO + 1))
+
+ethtool_time_stamping()
+{
+       local ts_output
+
+       ts_output=$(ip netns exec "$testns" $ynl_ethtool --show-time-stamping "$NSIM_DEV_NAME" 2>/dev/null)
+
+       if ! echo "$ts_output" | grep -q -E "(Time stamping|timestamping|SOF_TIMESTAMPING)"; then
+               ktap_test_fail "YNL ethtool time stamping (time stamping output missing expected content)"
+               return
+       fi
+
+       ktap_test_pass "YNL ethtool time stamping"
+}
+TESTS_NO=$((TESTS_NO + 1))
+
+setup()
+{
+       modprobe netdevsim &> /dev/null
+       if ! [ -f /sys/bus/netdevsim/new_device ]; then
+               ktap_skip_all "netdevsim module not available"
+               exit "$KSFT_SKIP"
+       fi
+
+       if ! ip netns add "$testns" 2>/dev/null; then
+               ktap_skip_all "failed to create test namespace"
+               exit "$KSFT_SKIP"
+       fi
+
+       echo "$NSIM_ID 1" | ip netns exec "$testns" tee /sys/bus/netdevsim/new_device >/dev/null 2>&1 || {
+               ktap_skip_all "failed to create netdevsim device"
+               exit "$KSFT_SKIP"
+       }
+
+       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
+               ktap_skip_all "failed to find netdevsim device"
+               exit "$KSFT_SKIP"
+       fi
+
+       ip -netns "$testns" link set dev "$dev" name "$NSIM_DEV_NAME" 2>/dev/null || {
+               ktap_skip_all "failed to rename netdevsim device"
+               exit "$KSFT_SKIP"
+       }
+
+       ip -netns "$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
+               ktap_skip_all "failed to create veth pair"
+               exit "$KSFT_SKIP"
+       fi
+
+       ip -n "$testns" link set "$VETH_A" up 2>/dev/null
+       ip -n "$testns" link set "$VETH_B" up 2>/dev/null
+}
+
+cleanup()
+{
+       ip netns exec "$testns" bash -c "echo $NSIM_ID > /sys/bus/netdevsim/del_device" 2>/dev/null || true
+       ip netns del "$testns" 2>/dev/null || true
+}
+
+# Check if ynl-ethtool command is available
+if ! command -v $ynl_ethtool &>/dev/null && [[ ! -x $ynl_ethtool ]]; then
+       ktap_skip_all "ynl-ethtool command not found: $ynl_ethtool"
+       exit "$KSFT_SKIP"
+fi
+
+trap cleanup EXIT
+
+ktap_print_header
+setup
+ktap_set_plan "${TESTS_NO}"
+
+ethtool_device_info
+ethtool_statistics
+ethtool_ring_params
+ethtool_coalesce_params
+ethtool_pause_params
+ethtool_features_info
+ethtool_channels_info
+ethtool_time_stamping
+
+ktap_finished