tools/testing/selftests/verification/test.d/rv_monitor_reactor.tc

#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-or-later
# description: Test monitor reactor setting
# requires: available_reactors

test_monitor_reactor() {
    local monitor="$1"
    local prefix="$2" # nested monitors

    while read -r reactor; do
        [ "$reactor" = nop ] && continue

        echo "$reactor" > "monitors/$prefix$monitor/reactors"
        grep -q "\\[$reactor\\]" "monitors/$prefix$monitor/reactors"
    done < available_reactors

    echo nop > "monitors/$prefix$monitor/reactors"
    grep -q "\\[nop\\]" "monitors/$prefix$monitor/reactors"
}

test_container_monitor() {
    local monitor="$1"
	local nested

    while read -r reactor; do
        [ "$reactor" = nop ] && continue

        echo "$reactor" > "monitors/$monitor/reactors"
        grep -q "\\[$reactor\\]" "monitors/$monitor/reactors"

        for nested_dir in "monitors/$monitor"/*; do
            [ -d "$nested_dir" ] || continue
            nested=$(basename "$nested_dir")
            grep -q "\\[$reactor\\]" "monitors/$monitor/$nested/reactors"
        done
    done < available_reactors
	test -n "$nested"

    echo nop > "monitors/$monitor/reactors"
    grep -q "\\[nop\\]" "monitors/$monitor/reactors"

    for nested_dir in "monitors/$monitor"/*; do
        [ -d "$nested_dir" ] || continue
        nested=$(basename "$nested_dir")
        grep -q "\\[nop\\]" "monitors/$monitor/$nested/reactors"
    done

    for nested_dir in "monitors/$monitor"/*; do
        [ -d "$nested_dir" ] || continue
        nested=$(basename "$nested_dir")
        test_monitor_reactor "$nested" "$monitor/"
    done
}

for monitor_dir in monitors/*; do
    monitor=$(basename "$monitor_dir")

    if find "$monitor_dir" -mindepth 1 -type d | grep -q .; then
        test_container_monitor "$monitor"
    else
        test_monitor_reactor "$monitor"
    fi
done

monitor=$(ls /sys/kernel/tracing/rv/monitors -1 | head -n 1)
test -f "monitors/$monitor/reactors"
! echo non_existent_reactor > "monitors/$monitor/reactors" || false
! grep -q "\\[non_existent_reactor\\]" "monitors/$monitor/reactors" || false