selftests: net: Add tests to verify team driver option set and get.

There are currently no kernel tests that verify setting and getting
options of the team driver.

In the future, options may be added that implicitly change other
options, which will make it useful to have tests like these that show
nothing breaks. There will be a follow up patch to this that adds new
"rx_enabled" and "tx_enabled" options, which will implicitly affect the
"enabled" option value and vice versa.

The tests use teamnl to first set options to specific values and then
gets them to compare to the set values.

Signed-off-by: Marc Harvey <marcharvey@google.com>
Link: https://patch.msgid.link/20250905040441.2679296-1-marcharvey@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

tools/testing/selftests/drivers/net/team/Makefile

@@ -1,11 +1,13 @@
 # SPDX-License-Identifier: GPL-2.0
 # Makefile for net selftests
 
-TEST_PROGS := dev_addr_lists.sh propagation.sh
+TEST_PROGS := dev_addr_lists.sh propagation.sh options.sh
 
 TEST_INCLUDES := \
 	../bonding/lag_lib.sh \
 	../../../net/forwarding/lib.sh \
-	../../../net/lib.sh
+	../../../net/lib.sh \
+	../../../net/in_netns.sh \
+	../../../net/lib/sh/defer.sh
 
 include ../../../lib.mk

tools/testing/selftests/drivers/net/team/config

@@ -3,4 +3,5 @@ CONFIG_IPV6=y
 CONFIG_MACVLAN=y
 CONFIG_NETDEVSIM=m
 CONFIG_NET_TEAM=y
+CONFIG_NET_TEAM_MODE_ACTIVEBACKUP=y
 CONFIG_NET_TEAM_MODE_LOADBALANCE=y

tools/testing/selftests/drivers/net/team/options.sh

@@ -0,0 +1,188 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+# These tests verify basic set and get functionality of the team
+# driver options over netlink.
+
+# Run in private netns.
+test_dir="$(dirname "$0")"
+if [[ $# -eq 0 ]]; then
+        "${test_dir}"/../../../net/in_netns.sh "$0" __subprocess
+        exit $?
+fi
+
+ALL_TESTS="
+        team_test_options
+"
+
+source "${test_dir}/../../../net/lib.sh"
+
+TEAM_PORT="team0"
+MEMBER_PORT="dummy0"
+
+setup()
+{
+        ip link add name "${MEMBER_PORT}" type dummy
+        ip link add name "${TEAM_PORT}" type team
+}
+
+get_and_check_value()
+{
+        local option_name="$1"
+        local expected_value="$2"
+        local port_flag="$3"
+
+        local value_from_get
+
+        if ! value_from_get=$(teamnl "${TEAM_PORT}" getoption "${option_name}" \
+                        "${port_flag}"); then
+                echo "Could not get option '${option_name}'" >&2
+                return 1
+        fi
+
+        if [[ "${value_from_get}" != "${expected_value}" ]]; then
+                echo "Incorrect value for option '${option_name}'" >&2
+                echo "get (${value_from_get}) != set (${expected_value})" >&2
+                return 1
+        fi
+}
+
+set_and_check_get()
+{
+        local option_name="$1"
+        local option_value="$2"
+        local port_flag="$3"
+
+        local value_from_get
+
+        if ! teamnl "${TEAM_PORT}" setoption "${option_name}" \
+                        "${option_value}" "${port_flag}"; then
+                echo "'setoption ${option_name} ${option_value}' failed" >&2
+                return 1
+        fi
+
+        get_and_check_value "${option_name}" "${option_value}" "${port_flag}"
+        return $?
+}
+
+# Get a "port flag" to pass to the `teamnl` command.
+# E.g. $1="dummy0" -> "port=dummy0",
+#      $1=""       -> ""
+get_port_flag()
+{
+        local port_name="$1"
+
+        if [[ -n "${port_name}" ]]; then
+                echo "--port=${port_name}"
+        fi
+}
+
+attach_port_if_specified()
+{
+        local port_name="$1"
+
+        if [[ -n "${port_name}" ]]; then
+                ip link set dev "${port_name}" master "${TEAM_PORT}"
+                return $?
+        fi
+}
+
+detach_port_if_specified()
+{
+        local port_name="$1"
+
+        if [[ -n "${port_name}" ]]; then
+                ip link set dev "${port_name}" nomaster
+                return $?
+        fi
+}
+
+# Test that an option's get value matches its set value.
+# Globals:
+#   RET - Used by testing infra like `check_err`.
+#   EXIT_STATUS - Used by `log_test` for whole script exit value.
+# Arguments:
+#   option_name - The name of the option.
+#   value_1 - The first value to try setting.
+#   value_2 - The second value to try setting.
+#   port_name - The (optional) name of the attached port.
+team_test_option()
+{
+        local option_name="$1"
+        local value_1="$2"
+        local value_2="$3"
+        local possible_values="$2 $3 $2"
+        local port_name="$4"
+        local port_flag
+
+        RET=0
+
+        echo "Setting '${option_name}' to '${value_1}' and '${value_2}'"
+
+        attach_port_if_specified "${port_name}"
+        check_err $? "Couldn't attach ${port_name} to master"
+        port_flag=$(get_port_flag "${port_name}")
+
+        # Set and get both possible values.
+        for value in ${possible_values}; do
+                set_and_check_get "${option_name}" "${value}" "${port_flag}"
+                check_err $? "Failed to set '${option_name}' to '${value}'"
+        done
+
+        detach_port_if_specified "${port_name}"
+        check_err $? "Couldn't detach ${port_name} from its master"
+
+        log_test "Set + Get '${option_name}' test"
+}
+
+# Test that getting a non-existant option fails.
+# Globals:
+#   RET - Used by testing infra like `check_err`.
+#   EXIT_STATUS - Used by `log_test` for whole script exit value.
+# Arguments:
+#   option_name - The name of the option.
+#   port_name - The (optional) name of the attached port.
+team_test_get_option_fails()
+{
+        local option_name="$1"
+        local port_name="$2"
+        local port_flag
+
+        RET=0
+
+        attach_port_if_specified "${port_name}"
+        check_err $? "Couldn't attach ${port_name} to master"
+        port_flag=$(get_port_flag "${port_name}")
+
+        # Just confirm that getting the value fails.
+        teamnl "${TEAM_PORT}" getoption "${option_name}" "${port_flag}"
+        check_fail $? "Shouldn't be able to get option '${option_name}'"
+
+        detach_port_if_specified "${port_name}"
+
+        log_test "Get '${option_name}' fails"
+}
+
+team_test_options()
+{
+        # Wrong option name behavior.
+        team_test_get_option_fails fake_option1
+        team_test_get_option_fails fake_option2 "${MEMBER_PORT}"
+
+        # Correct set and get behavior.
+        team_test_option mode activebackup loadbalance
+        team_test_option notify_peers_count 0 5
+        team_test_option notify_peers_interval 0 5
+        team_test_option mcast_rejoin_count 0 5
+        team_test_option mcast_rejoin_interval 0 5
+        team_test_option enabled true false "${MEMBER_PORT}"
+        team_test_option user_linkup true false "${MEMBER_PORT}"
+        team_test_option user_linkup_enabled true false "${MEMBER_PORT}"
+        team_test_option priority 10 20 "${MEMBER_PORT}"
+        team_test_option queue_id 0 1 "${MEMBER_PORT}"
+}
+
+require_command teamnl
+setup
+tests_run
+exit "${EXIT_STATUS}"