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 <[email protected]>
---
 tools/testing/selftests/Makefile           |   1 +
 tools/testing/selftests/net/ynl/Makefile   |  18 ++
 tools/testing/selftests/net/ynl/cli.sh     | 234 +++++++++++++++++++++
 tools/testing/selftests/net/ynl/config     |   6 +
 tools/testing/selftests/net/ynl/ethtool.sh | 188 +++++++++++++++++
 tools/testing/selftests/net/ynl/settings   |   1 +
 6 files changed, 448 insertions(+)
 create mode 100644 tools/testing/selftests/net/ynl/Makefile
 create mode 100755 tools/testing/selftests/net/ynl/cli.sh
 create mode 100644 tools/testing/selftests/net/ynl/config
 create mode 100755 tools/testing/selftests/net/ynl/ethtool.sh
 create mode 100644 tools/testing/selftests/net/ynl/settings

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index c46ebdb9b8ef..3335a8dc7cff 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -78,6 +78,7 @@ TARGETS += net/ovpn
 TARGETS += net/packetdrill
 TARGETS += net/rds
 TARGETS += net/tcp_ao
+TARGETS += net/ynl
 TARGETS += nolibc
 TARGETS += nsfs
 TARGETS += pci_endpoint
diff --git a/tools/testing/selftests/net/ynl/Makefile 
b/tools/testing/selftests/net/ynl/Makefile
new file mode 100644
index 000000000000..0144c47b69ab
--- /dev/null
+++ b/tools/testing/selftests/net/ynl/Makefile
@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: GPL-2.0
+# Makefile for YNL tests
+
+TEST_PROGS := \
+       cli.sh \
+       ethtool.sh \
+# end of TEST_PROGS
+
+TEST_FILES := \
+       settings \
+# end of TEST_FILES
+
+TEST_INCLUDES := \
+       $(wildcard ../lib/sh/*.sh) \
+       ../lib.sh \
+# end of TEST_INCLUDES
+
+include ../../lib.mk
diff --git a/tools/testing/selftests/net/ynl/cli.sh 
b/tools/testing/selftests/net/ynl/cli.sh
new file mode 100755
index 000000000000..ecc2e349c4e6
--- /dev/null
+++ b/tools/testing/selftests/net/ynl/cli.sh
@@ -0,0 +1,234 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Test YNL CLI functionality
+
+# shellcheck disable=SC1091,SC2034,SC2154,SC2317
+source ../lib.sh
+
+readonly NSIM_ID="1338"
+readonly NSIM_DEV_NAME="nsim${NSIM_ID}"
+readonly VETH_A="veth_a"
+readonly VETH_B="veth_b"
+
+ALL_TESTS="
+       cli_list_families
+       cli_netdev_ops
+       cli_ethtool_ops
+       cli_rt_ops
+       cli_nlctrl_ops
+"
+
+# Test listing available families
+cli_list_families()
+{
+       RET=0
+
+       ynl --list-families &>/dev/null
+       check_err $? "failed to list families"
+
+       log_test "YNL CLI list families"
+}
+
+# Test netdev family operations (dev-get, queue-get)
+cli_netdev_ops()
+{
+       RET=0
+
+       local dev_output
+       local ifindex
+       ifindex=$(ip netns exec "$testns" cat 
/sys/class/net/"$NSIM_DEV_NAME"/ifindex)
+
+       dev_output=$(ip netns exec "$testns" ynl --family netdev \
+               --do dev-get --json "{\"ifindex\": $ifindex}" 2>/dev/null)
+       check_err $? "failed to get netdev dev info for $NSIM_DEV_NAME"
+
+       echo "$dev_output" | grep -q "ifindex"
+       check_err $? "netdev dev-get output missing ifindex"
+
+       ip netns exec "$testns" ynl --family netdev \
+               --dump queue-get --json "{\"ifindex\": $ifindex}" &>/dev/null
+       check_err $? "failed to get netdev queue info for $NSIM_DEV_NAME"
+
+       log_test "YNL CLI netdev operations"
+}
+
+# Test ethtool family operations (rings-get, linkinfo-get)
+cli_ethtool_ops()
+{
+       RET=0
+
+       local rings_output
+       rings_output=$(ip netns exec "$testns" ynl --family ethtool \
+               --do rings-get --json "{\"header\": {\"dev-name\": 
\"$NSIM_DEV_NAME\"}}" 2>/dev/null)
+       check_err $? "failed to get ethtool rings info for $NSIM_DEV_NAME"
+
+       echo "$rings_output" | grep -q "header"
+       check_err $? "ethtool rings-get output missing header"
+
+       local linkinfo_output
+       linkinfo_output=$(ip netns exec "$testns" ynl --family ethtool \
+               --do linkinfo-get --json "{\"header\": {\"dev-name\": 
\"$VETH_A\"}}" 2>/dev/null)
+       check_err $? "failed to get ethtool linkinfo for $VETH_A"
+
+       echo "$linkinfo_output" | grep -q "header"
+       check_err $? "ethtool linkinfo-get output missing header"
+
+       log_test "YNL CLI ethtool operations"
+}
+
+# Test rt-* family operations (route, addr, link, neigh, rule)
+cli_rt_ops()
+{
+       RET=0
+       if ! ynl --list-families 2>/dev/null | grep -q "rt-"; then
+               log_test_skip "YNL CLI rt-* operations" "no rt-* families 
available"
+               return "$ksft_skip"
+       fi
+
+       local ifindex
+       ifindex=$(ip netns exec "$testns" cat 
/sys/class/net/"$NSIM_DEV_NAME"/ifindex)
+
+       if ynl --list-families 2>/dev/null | grep -q "rt-route"; then
+               # Add route: 192.0.2.0/24 dev $dev scope link
+               ip netns exec "$testns" ynl --family rt-route --do newroute 
--create \
+                       --json "{\"dst\": \"192.0.2.0\", \"oif\": $ifindex, 
\"rtm-dst-len\": 24, \"rtm-family\": 2, \"rtm-scope\": 253, \"rtm-type\": 1, 
\"rtm-protocol\": 3, \"rtm-table\": 254}" &>/dev/null
+
+               local route_output
+               route_output=$(ip netns exec "$testns" ynl --family rt-route \
+                       --dump getroute 2>/dev/null)
+               check_err $? "failed to get route info"
+
+               echo "$route_output" | grep -q "192.0.2.0"
+               check_err $? "added route 192.0.2.0 not found in route output"
+
+               ip netns exec "$testns" ynl --family rt-route --do delroute \
+                       --json "{\"dst\": \"192.0.2.0\", \"oif\": $ifindex, 
\"rtm-dst-len\": 24, \"rtm-family\": 2, \"rtm-scope\": 253, \"rtm-type\": 1, 
\"rtm-protocol\": 3, \"rtm-table\": 254}" &>/dev/null
+       fi
+
+       if ynl --list-families 2>/dev/null | grep -q "rt-addr"; then
+               ip netns exec "$testns" ynl --family rt-addr --do newaddr \
+                       --json "{\"ifa-index\": $ifindex, \"local\": 
\"192.0.2.100\", \"ifa-prefixlen\": 24, \"ifa-family\": 2}" &>/dev/null
+
+               local addr_output
+               addr_output=$(ip netns exec "$testns" ynl --family rt-addr \
+                       --dump getaddr 2>/dev/null)
+               check_err $? "failed to get address info"
+
+               echo "$addr_output" | grep -q "192.0.2.100"
+               check_err $? "added address 192.0.2.100 not found in address 
output"
+
+               ip netns exec "$testns" ynl --family rt-addr --do deladdr \
+                       --json "{\"ifa-index\": $ifindex, \"local\": 
\"192.0.2.100\", \"ifa-prefixlen\": 24, \"ifa-family\": 2}" &>/dev/null
+       fi
+
+       if ynl --list-families 2>/dev/null | grep -q "rt-link"; then
+               ip netns exec "$testns" ynl --family rt-link --do newlink 
--create \
+                       --json "{\"ifname\": \"dummy0\", \"linkinfo\": 
{\"kind\": \"dummy\"}}" &>/dev/null
+
+               local link_output
+               link_output=$(ip netns exec "$testns" ynl --family rt-link \
+                       --dump getlink 2>/dev/null)
+               check_err $? "failed to get link info"
+
+               echo "$link_output" | grep -q "$NSIM_DEV_NAME"
+               check_err $? "test device not found in link output"
+
+               echo "$link_output" | grep -q "dummy0"
+               check_err $? "created dummy0 interface not found in link output"
+
+               ip netns exec "$testns" ynl --family rt-link --do dellink \
+                       --json "{\"ifname\": \"dummy0\"}" &>/dev/null
+       fi
+
+       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
+               ip netns exec "$testns" ynl --family rt-neigh --do newneigh 
--create \
+                       --json "{\"ndm-ifindex\": $ifindex, \"dst\": 
\"192.0.2.1\", \"lladdr\": \"11:22:33:44:55:66\", \"ndm-family\": 2, 
\"ndm-state\": 128}" &>/dev/null
+
+               local neigh_output
+               neigh_output=$(ip netns exec "$testns" ynl --family rt-neigh \
+                       --dump getneigh 2>/dev/null)
+               check_err $? "failed to get neighbor info"
+
+               echo "$neigh_output" | grep -q "192.0.2.1"
+               check_err $? "added neighbor 192.0.2.1 not found in neighbor 
output"
+
+               ip netns exec "$testns" ynl --family rt-neigh --do delneigh \
+                       --json "{\"ndm-ifindex\": $ifindex, \"dst\": 
\"192.0.2.1\", \"lladdr\": \"11:22:33:44:55:66\", \"ndm-family\": 2}" 
&>/dev/null
+       fi
+
+       if ynl --list-families 2>/dev/null | grep -q "rt-rule"; then
+               # Add rule: from 192.0.2.0/24 lookup 100 none
+               ip netns exec "$testns" ynl --family rt-rule --do newrule \
+                       --json "{\"family\": 2, \"src-len\": 24, \"src\": 
\"192.0.2.0\", \"table\": 100}" &>/dev/null
+
+               local rule_output
+               rule_output=$(ip netns exec "$testns" ynl --family rt-rule \
+                       --dump getrule 2>/dev/null)
+               check_err $? "failed to get rule info"
+
+               echo "$rule_output" | grep -q "192.0.2.0"
+               check_err $? "added rule with src 192.0.2.0 not found in rule 
output"
+
+               ip netns exec "$testns" ynl --family rt-rule --do delrule \
+                       --json "{\"family\": 2, \"src-len\": 24, \"src\": 
\"192.0.2.0\", \"table\": 100}" &>/dev/null
+       fi
+
+       log_test "YNL CLI rt-* operations"
+}
+
+# Test nlctrl family operations
+cli_nlctrl_ops()
+{
+       RET=0
+
+       local family_output
+       family_output=$(ynl --family nlctrl \
+               --do getfamily --json "{\"family-name\": \"netdev\"}" 
2>/dev/null)
+       check_err $? "failed to get nlctrl family info for netdev"
+
+       echo "$family_output" | grep -q "family-name"
+       check_err $? "nlctrl getfamily output missing family-name"
+
+       echo "$family_output" | grep -q "family-id"
+       check_err $? "nlctrl getfamily output missing family-id"
+
+       log_test "YNL CLI nlctrl getfamily"
+}
+
+setup()
+{
+       if ! modprobe netdevsim &>/dev/null; then
+               log_test_skip "all YNL CLI tests" "netdevsim module not 
available"
+               exit "$ksft_skip"
+       fi
+
+       setup_ns testns
+
+       if ! create_netdevsim "$NSIM_ID" "$testns" &>/dev/null; then
+               log_test_skip "all YNL CLI tests" "failed to create netdevsim 
device"
+               exit "$ksft_skip"
+       fi
+
+       if ! ip -n "$testns" link add "$VETH_A" type veth peer name "$VETH_B"; 
then
+               log_test_skip "all YNL CLI tests" "failed to create veth pair"
+               exit "$ksft_skip"
+       fi
+
+       ip -n "$testns" link set "$VETH_A" up
+       ip -n "$testns" link set "$VETH_B" up
+}
+
+cleanup()
+{
+       cleanup_netdevsim "$NSIM_ID"
+       cleanup_all_ns
+}
+
+trap cleanup EXIT
+
+require_command "ynl"
+setup
+tests_run
+
+exit "$EXIT_STATUS"
diff --git a/tools/testing/selftests/net/ynl/config 
b/tools/testing/selftests/net/ynl/config
new file mode 100644
index 000000000000..339f1309c03f
--- /dev/null
+++ b/tools/testing/selftests/net/ynl/config
@@ -0,0 +1,6 @@
+CONFIG_DUMMY=m
+CONFIG_INET_DIAG=y
+CONFIG_IPV6=y
+CONFIG_NET_NS=y
+CONFIG_NETDEVSIM=m
+CONFIG_VETH=m
diff --git a/tools/testing/selftests/net/ynl/ethtool.sh 
b/tools/testing/selftests/net/ynl/ethtool.sh
new file mode 100755
index 000000000000..a70552afd7e2
--- /dev/null
+++ b/tools/testing/selftests/net/ynl/ethtool.sh
@@ -0,0 +1,188 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Test YNL ethtool functionality
+
+# shellcheck disable=SC1091,SC2034,SC2154,SC2317
+source ../lib.sh
+
+readonly NSIM_ID="1337"
+readonly NSIM_DEV_NAME="nsim${NSIM_ID}"
+readonly VETH_A="veth_a"
+readonly VETH_B="veth_b"
+
+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
+"
+
+# Uses veth device as netdevsim doesn't support basic ethtool device info
+ethtool_device_info()
+{
+       RET=0
+
+       local info_output
+       info_output=$(ip netns exec "$testns" ynl-ethtool "$VETH_A" 2>/dev/null)
+       check_err $? "failed to get device info for $VETH_A"
+
+       echo "$info_output" | grep -q "Settings for"
+       check_err $? "device info output missing expected content"
+
+       log_test "YNL ethtool device info"
+}
+
+ethtool_statistics()
+{
+       RET=0
+
+       local stats_output
+       stats_output=$(ip netns exec "$testns" ynl-ethtool --statistics 
"$NSIM_DEV_NAME" 2>/dev/null)
+       check_err $? "failed to get statistics for $NSIM_DEV_NAME"
+
+       echo "$stats_output" | grep -q -E "(NIC statistics|packets|bytes)"
+       check_err $? "statistics output missing expected content"
+
+       log_test "YNL ethtool statistics"
+}
+
+ethtool_ring_params()
+{
+       RET=0
+
+       local ring_output
+       ring_output=$(ip netns exec "$testns" ynl-ethtool --show-ring 
"$NSIM_DEV_NAME" 2>/dev/null)
+       check_err $? "failed to get ring parameters for $NSIM_DEV_NAME"
+
+       if [[ -n "$ring_output" ]]; then
+               echo "$ring_output" | grep -q -E "(Ring parameters|RX|TX)"
+               check_err $? "ring parameters output missing expected content"
+       fi
+
+       if ! ip netns exec "$testns" ynl-ethtool --set-ring "$NSIM_DEV_NAME" rx 
64 2>/dev/null; then
+               check_err 1 "set-ring command failed unexpectedly"
+       fi
+
+       log_test "YNL ethtool ring parameters (show/set)"
+}
+
+ethtool_coalesce_params()
+{
+       RET=0
+
+       ip netns exec "$testns" ynl-ethtool --show-coalesce "$NSIM_DEV_NAME" 
&>/dev/null
+       check_err $? "failed to get coalesce parameters for $NSIM_DEV_NAME"
+
+       if ! ip netns exec "$testns" ynl-ethtool --set-coalesce 
"$NSIM_DEV_NAME" rx-usecs 50 2>/dev/null; then
+               check_err 1 "set-coalesce command failed unexpectedly"
+       fi
+
+       log_test "YNL ethtool coalesce parameters (show/set)"
+}
+
+ethtool_pause_params()
+{
+       RET=0
+
+       ip netns exec "$testns" ynl-ethtool --show-pause "$NSIM_DEV_NAME" 
&>/dev/null
+       check_err $? "failed to get pause parameters for $NSIM_DEV_NAME"
+
+       if ! ip netns exec "$testns" ynl-ethtool --set-pause "$NSIM_DEV_NAME" 
tx 1 rx 1 2>/dev/null; then
+               check_err 1 "set-pause command failed unexpectedly"
+       fi
+
+       log_test "YNL ethtool pause parameters (show/set)"
+}
+
+ethtool_features_info()
+{
+       RET=0
+
+       local features_output
+       features_output=$(ip netns exec "$testns" ynl-ethtool --show-features 
"$NSIM_DEV_NAME" 2>/dev/null)
+       check_err $? "failed to get features for $NSIM_DEV_NAME"
+
+       if [[ -n "$features_output" ]]; then
+               echo "$features_output" | grep -q -E "(Features|offload)"
+               check_err $? "features output missing expected content"
+       fi
+
+       log_test "YNL ethtool features info (show/set)"
+}
+
+ethtool_channels_info()
+{
+       RET=0
+
+       local channels_output
+       channels_output=$(ip netns exec "$testns" ynl-ethtool --show-channels 
"$NSIM_DEV_NAME" 2>/dev/null)
+       check_err $? "failed to get channels for $NSIM_DEV_NAME"
+
+       if [[ -n "$channels_output" ]]; then
+               echo "$channels_output" | grep -q -E "(Channel|Combined|RX|TX)"
+               check_err $? "channels output missing expected content"
+       fi
+
+       if ! ip netns exec "$testns" ynl-ethtool --set-channels 
"$NSIM_DEV_NAME" combined-count 1 2>/dev/null; then
+               check_err 1 "set-channels command failed unexpectedly"
+       fi
+
+       log_test "YNL ethtool channels info (show/set)"
+}
+
+ethtool_time_stamping()
+{
+       RET=0
+
+       local ts_output
+       ts_output=$(ip netns exec "$testns" ynl-ethtool --show-time-stamping 
"$NSIM_DEV_NAME" 2>/dev/null)
+       check_err $? "failed to get time stamping info for $NSIM_DEV_NAME"
+
+       if [[ -n "$ts_output" ]]; then
+               echo "$ts_output" | grep -q -E "(Time 
stamping|timestamping|SOF_TIMESTAMPING)"
+               check_err $? "time stamping output missing expected content"
+       fi
+
+       log_test "YNL ethtool time stamping"
+}
+
+setup()
+{
+       if ! modprobe netdevsim &>/dev/null; then
+               log_test_skip "all YNL ethtool tests" "netdevsim module not 
available"
+               exit "$ksft_skip"
+       fi
+
+       setup_ns testns
+
+       if ! create_netdevsim "$NSIM_ID" "$testns" >/dev/null 2>&1; then
+               log_test_skip "all YNL ethtool tests" "failed to create 
netdevsim device"
+               exit "$ksft_skip"
+       fi
+
+       if ! ip -n "$testns" link add "$VETH_A" type veth peer name "$VETH_B" 
2>/dev/null; then
+               log_test_skip "all YNL ethtool tests" "failed to create veth 
pair"
+               exit "$ksft_skip"
+       fi
+
+       ip -n "$testns" link set "$VETH_A" up
+       ip -n "$testns" link set "$VETH_B" up
+}
+
+cleanup()
+{
+       cleanup_netdevsim "$NSIM_ID" 2>/dev/null
+       cleanup_all_ns
+}
+
+trap cleanup EXIT
+
+require_command "ynl-ethtool"
+setup
+tests_run
+
+exit "$EXIT_STATUS"
diff --git a/tools/testing/selftests/net/ynl/settings 
b/tools/testing/selftests/net/ynl/settings
new file mode 100644
index 000000000000..6091b45d226b
--- /dev/null
+++ b/tools/testing/selftests/net/ynl/settings
@@ -0,0 +1 @@
+timeout=120
-- 
2.50.1


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