cmds/statsd/src/stats_events.proto

/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed 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 = "proto2";

// TODO: Not the right package and class name
package android.os.statsd;
option java_package = "com.android.os";
option java_outer_classname = "StatsEventProto";

/**
 * The master event class. This message defines all of the available
 * raw stats log events from the Android system, also known as "atoms."
 *
 * This field contains a single oneof with all of the available messages.
 * The stats-log-api-gen tool runs as part of the Android build and
 * generates the android.util.StatsLog class, which contains the constants
 * and methods that Android uses to log.
 *
 * This StatsEvent class is not actually built into the Android system.
 * Instead, statsd on Android constructs these messages synthetically,
 * in the format defined here and in stats_log.proto.
 */
message StatsEvent {
    oneof event {
        // For StatsLog reasons, 1 is illegal and will not work. Must start at 2.
        BleScanStateChanged ble_scan_state_changed = 2;
        BleUnoptimizedScanStateChanged ble_unoptimized_scan_state_changed = 3;
        BleScanResultReceived ble_scan_result_received = 4;
        SensorStateChanged sensor_state_changed = 5;
        GpsScanStateChanged gps_scan_state_changed = 6; // TODO: untested
        SyncStateChanged sync_state_changed = 7;
        ScheduledJobStateChanged scheduled_job_state_changed = 8;
        ScreenBrightnessChanged screen_brightness_changed = 9;
        // 10-20 are temporarily reserved for wakelocks etc.
        UidWakelockStateChanged uid_wakelock_state_changed = 11;
        LongPartialWakelockStateChanged long_partial_wakelock_state_changed = 12;
        BatterySaverModeStateChanged battery_saver_mode_state_changed = 21;
        DeviceIdleModeStateChanged device_idle_mode_state_changed = 22;
        AudioStateChanged audio_state_changed = 23;
        MediaCodecActivityChanged media_codec_activity_changed = 24;
        CameraStateChanged camera_state_changed = 25;
        FlashlightStateChanged flashlight_state_changed = 26;
        UidProcessStateChanged uid_process_state_changed = 27;
        ProcessLifeCycleStateChanged process_life_cycle_state_changed = 28;
        ScreenStateChanged screen_state_changed = 29;
        // TODO: Reorder the numbering so that the most frequent occur events occur in the first 15.
    }
}

/**
 * A WorkSource represents the chained attribution of applications that
 * resulted in a particular bit of work being done.
 */
message WorkSource {
    // TODO
}

/*
 * *****************************************************************************
 * Below are all of the individual atoms that are logged by Android via statsd
 * and Westworld.
 *
 * RULES:
 *   - The field ids for each atom must start at 1, and count upwards by 1.
 *     Skipping field ids is not allowed.
 *   - These form an API, so renaming, renumbering or removing fields is
 *     not allowed between android releases.  (This is not currently enforced,
 *     but there will be a tool to enforce this restriction).
 *   - The types must be built-in protocol buffer types, namely, no sub-messages
 *     are allowed (yet).  The bytes type is also not allowed.
 *   - The CamelCase name of the message type should match the
 *     underscore_separated name as defined in StatsEvent.
 *   - If an atom represents work that can be attributed to an app, there can
 *     be exactly one WorkSource field. It must be field number 1.
 *   - A field that is a uid should be a string field, tagged with the [xxx]
 *     annotation. The generated code on android will be represented by UIDs,
 *     and those UIDs will be translated in xxx to those strings.
 *
 * CONVENTIONS:
 *   - Events are past tense. e.g. ScreenStateChanged, not ScreenStateChange.
 *   - If there is a UID, it goes first. Think in an object-oriented fashion.
 * *****************************************************************************
 */

/**
 * Logs when the screen state changes.
 *
 * Logged from:
 *   frameworks/base/services/core/java/com/android/server/am/BatteryStatsService.java
 */
message ScreenStateChanged {
    // TODO: Use the real screen state.
    enum State {
        STATE_UNKNOWN = 0;
        STATE_OFF = 1;
        STATE_ON = 2;
        STATE_DOZE = 3;
        STATE_DOZE_SUSPEND = 4;
        STATE_VR = 5;
    }
    // New screen state.
    optional State display_state = 1;
}

/**
 * Logs that the state of a process state, as per the activity manager, has changed.
 *
 * Logged from:
 *   frameworks/base/services/core/java/com/android/server/am/BatteryStatsService.java
 */
message UidProcessStateChanged {
    optional int32 uid = 1; // TODO: should be a string tagged w/ uid annotation

    // The state.
    // TODO: Use the real (mapped) process states.
    optional int32 state = 2;
}

/**
 * Logs that a process started, finished, crashed, or ANRed.
 *
 * Logged from:
 *   frameworks/base/services/core/java/com/android/server/am/BatteryStatsService.java
 */
message ProcessLifeCycleStateChanged {
    // TODO: Use the real (mapped) process states.
    optional int32 uid = 1; // TODO: should be a string tagged w/ uid annotation

    // TODO: What is this?
    optional string name = 2;

    // The state.
    // TODO: Use an enum.
    optional int32 event = 3;
}



/**
 * Logs when the ble scan state changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message BleScanStateChanged {
    // TODO: Add attribution instead of uid.
    optional int32 uid = 1;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 2;
}

/**
 * Logs when an unoptimized ble scan state changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
// TODO: Consider changing to tracking per-scanner-id (log from AppScanStats).
message BleUnoptimizedScanStateChanged {
    // TODO: Add attribution instead of uid.
    optional int32 uid = 1;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 2;
}

/**
 * Logs reporting of a ble scan finding results.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
// TODO: Consider changing to tracking per-scanner-id (log from AppScanStats).
message BleScanResultReceived {
    // TODO: Add attribution instead of uid.
    optional int32 uid = 1;

    // Number of ble scan results returned.
    optional int32 num_of_results = 2;
}

/**
 * Logs when a sensor state changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message SensorStateChanged {
    // TODO: Add attribution instead of uid.
    optional int32 uid = 1;

    // TODO: Is there a way to get the actual name of the sensor?
    // The id (int) of the sensor.
    optional int32 sensor_id = 2;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 3;
}


/**
 * Logs when GPS state changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message GpsScanStateChanged {
    // TODO: Add attribution instead of uid.
    optional int32 uid = 1;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 2;
}


/**
 * Logs when a sync manager sync state changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message SyncStateChanged {
    // TODO: Add attribution instead of uid.
    optional int32 uid = 1;

    // Name of the sync (as named in the app)
    optional string name = 2;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 3;
}

/**
 * Logs when a job scheduler job state changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message ScheduledJobStateChanged {
    // TODO: Add attribution instead of uid.
    optional int32 uid = 1;

    // Name of the job (as named in the app)
    optional string name = 2;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 3;

    // TODO: Consider adding the stopReason (int)
}

/**
 * Logs when the audio state changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message AudioStateChanged {
    // TODO: Add attribution instead of uid.
    optional int32 uid = 1;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 2;
}

/**
 * Logs when the video codec state changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message MediaCodecActivityChanged {
    // TODO: Add attribution instead of uid.
    optional int32 uid = 1;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 2;
}

/**
 * Logs when the flashlight state changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message FlashlightStateChanged {
    // TODO: Add attribution instead of uid.
    optional int32 uid = 1;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 2;
}

/**
 * Logs when the camera state changes.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message CameraStateChanged {
    // TODO: Add attribution instead of uid.
    optional int32 uid = 1;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 2;
}

/**
 * Logs that the state of a wakelock (per app and per wakelock name) has changed.
 *
 * Logged from:
 *   TODO
 */
message WakelockChanged {
    // TODO: Add attribution instead of uid.
    optional int32 uid = 1;

    // Type of wakelock.
    enum Type {
        PARTIAL = 0;
        FULL = 1;
        WINDOW = 2;
    }
    optional int32 type = 2;

    // The wakelock tag (Called tag in the Java API, sometimes name elsewhere).
    optional string tag = 3;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 4;
}

/**
 * Logs when an app is holding a wakelock, regardless of the wakelock's name.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message UidWakelockStateChanged {
    // TODO: Add attribution instead of uid.
    optional int32 uid = 1;

    // Type of wakelock.
    enum Type {
        PARTIAL = 0;
        FULL = 1;
        WINDOW = 2;
    }
    optional int32 type = 2;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 3;
}

/**
 * Logs when a partial wakelock is considered 'long' (over 1 min).
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message LongPartialWakelockStateChanged {
    // TODO: Add attribution instead of uid?
    optional int32 uid = 1;

    // The wakelock tag (Called tag in the Java API, sometimes name elsewhere).
    optional string tag = 2;

    // TODO: I have no idea what this is.
    optional string history_tag = 3;

    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 4;
}

/**
 * Logs Battery Saver state change.
 *
 * Logged from:
 *   frameworks/base/core/java/com/android/internal/os/BatteryStatsImpl.java
 */
message BatterySaverModeStateChanged {
    enum State {
        OFF = 0;
        ON = 1;
    }
    optional State state = 1;
}

/**
 * Logs Doze mode state change.
 *
 * Logged from:
 *   frameworks/base/services/core/java/com/android/server/am/BatteryStatsService.java
 */
message DeviceIdleModeStateChanged {
    // TODO: Use the enum matching BatteryStats.DEVICE_IDLE_MODE_.
    optional int32 state = 1;
}

/**
 * Logs screen brightness level.
 *
 * Logged from:
 *   frameworks/base/services/core/java/com/android/server/am/BatteryStatsService.java
 */
message ScreenBrightnessChanged {
    // Screen brightness level. Should be in [-1, 255] according to PowerManager.java.
    optional int32 level = 1;
}