/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

syntax = "proto3";

package skywalking.v3;

option java_multiple_files = true;
option java_package = "org.apache.skywalking.apm.network.ebpf.profiling.v3";
option go_package = "skywalking.apache.org/repo/goapi/collect/ebpf/profiling/v3";

import "common/Common.proto";

// Define the Rover Process profiling task and upload profiling data.
service EBPFProfilingService {
    // Query profiling (start or stop) tasks
    rpc queryTasks (EBPFProfilingTaskQuery) returns (Commands) {
    }

    // collect profiling data
    rpc collectProfilingData (stream EBPFProfilingData) returns (Commands) {
    }
}

message EBPFProfilingTaskQuery {
    // rover instance id
    string roverInstanceId = 1;

    // latest task update time
    int64 latestUpdateTime = 2;
}

message EBPFProfilingData {
    // task metadata
    EBPFProfilingTaskMetadata task = 1;
    // profiling data
    oneof profiling {
        EBPFOnCPUProfiling onCPU = 2;
        EBPFOffCPUProfiling offCPU = 3;
    }
}

message EBPFProfilingTaskMetadata {
    // profiling task id
    string taskId = 1;
    // profiling process id
    string processId = 2;
    // the start time of this profiling process
    int64 profilingStartTime = 3;
    // report time
    int64 currentTime = 4;
}

message EBPFProfilingStackMetadata {
    // stack type
    EBPFProfilingStackType stackType = 1;
    // stack id from kernel provide
    int32 stackId = 2;
    // stack symbols
    repeated string stackSymbols = 3;
}

enum EBPFProfilingStackType {
    PROCESS_KERNEL_SPACE = 0;
    PROCESS_USER_SPACE = 1;
}

message EBPFOnCPUProfiling {
    // stack data in one task(thread)
    repeated EBPFProfilingStackMetadata stacks = 1;
    // stack counts
    int32 dumpCount = 2;
}

message EBPFOffCPUProfiling {
    // stack data in one task(thread)
    repeated EBPFProfilingStackMetadata stacks = 1;
    // total count of the process is switched to off cpu by the scheduler.
    int32 switchCount = 2;
    // where time(nanoseconds) is spent waiting while blocked on I/O, locks, timers, paging/swapping, etc.
    int64 duration = 3;
}