Hongyi Zhang | 700137e | 2019-05-23 21:19:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2019 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.server; |
| 18 | |
| 19 | import android.app.ActivityManager; |
| 20 | import android.location.LocationManager; |
| 21 | import android.location.LocationRequest; |
| 22 | import android.os.SystemClock; |
| 23 | import android.stats.location.LocationStatsEnums; |
| 24 | import android.util.Log; |
| 25 | import android.util.StatsLog; |
| 26 | |
| 27 | import java.time.Instant; |
| 28 | |
| 29 | /** |
| 30 | * Logger for Location API usage logging. |
| 31 | */ |
| 32 | class LocationUsageLogger { |
| 33 | private static final String TAG = "LocationUsageLogger"; |
| 34 | private static final boolean D = Log.isLoggable(TAG, Log.DEBUG); |
| 35 | |
| 36 | private static final int ONE_SEC_IN_MILLIS = 1000; |
| 37 | private static final int ONE_MINUTE_IN_MILLIS = 60000; |
| 38 | private static final int ONE_HOUR_IN_MILLIS = 3600000; |
| 39 | |
| 40 | private long mLastApiUsageLogHour = 0; |
| 41 | |
| 42 | private int mApiUsageLogHourlyCount = 0; |
| 43 | |
| 44 | private static final int API_USAGE_LOG_HOURLY_CAP = 60; |
| 45 | |
| 46 | private static int providerNameToStatsdEnum(String provider) { |
| 47 | if (LocationManager.NETWORK_PROVIDER.equals(provider)) { |
| 48 | return LocationStatsEnums.PROVIDER_NETWORK; |
| 49 | } else if (LocationManager.GPS_PROVIDER.equals(provider)) { |
| 50 | return LocationStatsEnums.PROVIDER_GPS; |
| 51 | } else if (LocationManager.PASSIVE_PROVIDER.equals(provider)) { |
| 52 | return LocationStatsEnums.PROVIDER_PASSIVE; |
| 53 | } else if (LocationManager.FUSED_PROVIDER.equals(provider)) { |
| 54 | return LocationStatsEnums.PROVIDER_FUSED; |
| 55 | } else { |
| 56 | return LocationStatsEnums.PROVIDER_UNKNOWN; |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | private static int bucketizeIntervalToStatsdEnum(long interval) { |
| 61 | // LocationManager already converts negative values to 0. |
| 62 | if (interval < ONE_SEC_IN_MILLIS) { |
| 63 | return LocationStatsEnums.INTERVAL_BETWEEN_0_SEC_AND_1_SEC; |
| 64 | } else if (interval < ONE_SEC_IN_MILLIS * 5) { |
| 65 | return LocationStatsEnums.INTERVAL_BETWEEN_1_SEC_AND_5_SEC; |
| 66 | } else if (interval < ONE_MINUTE_IN_MILLIS) { |
| 67 | return LocationStatsEnums.INTERVAL_BETWEEN_5_SEC_AND_1_MIN; |
| 68 | } else if (interval < ONE_MINUTE_IN_MILLIS * 10) { |
| 69 | return LocationStatsEnums.INTERVAL_BETWEEN_1_MIN_AND_10_MIN; |
| 70 | } else if (interval < ONE_HOUR_IN_MILLIS) { |
| 71 | return LocationStatsEnums.INTERVAL_BETWEEN_10_MIN_AND_1_HOUR; |
| 72 | } else { |
| 73 | return LocationStatsEnums.INTERVAL_LARGER_THAN_1_HOUR; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | private static int bucketizeSmallestDisplacementToStatsdEnum(float smallestDisplacement) { |
| 78 | // LocationManager already converts negative values to 0. |
| 79 | if (smallestDisplacement == 0) { |
| 80 | return LocationStatsEnums.DISTANCE_ZERO; |
| 81 | } else if (smallestDisplacement > 0 && smallestDisplacement <= 100) { |
| 82 | return LocationStatsEnums.DISTANCE_BETWEEN_0_AND_100; |
| 83 | } else { |
| 84 | return LocationStatsEnums.DISTANCE_LARGER_THAN_100; |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | private static int bucketizeRadiusToStatsdEnum(float radius) { |
| 89 | if (radius < 0) { |
| 90 | return LocationStatsEnums.RADIUS_NEGATIVE; |
| 91 | } else if (radius < 100) { |
| 92 | return LocationStatsEnums.RADIUS_BETWEEN_0_AND_100; |
| 93 | } else if (radius < 200) { |
| 94 | return LocationStatsEnums.RADIUS_BETWEEN_100_AND_200; |
| 95 | } else if (radius < 300) { |
| 96 | return LocationStatsEnums.RADIUS_BETWEEN_200_AND_300; |
| 97 | } else if (radius < 1000) { |
| 98 | return LocationStatsEnums.RADIUS_BETWEEN_300_AND_1000; |
| 99 | } else if (radius < 10000) { |
| 100 | return LocationStatsEnums.RADIUS_BETWEEN_1000_AND_10000; |
| 101 | } else { |
| 102 | return LocationStatsEnums.RADIUS_LARGER_THAN_100000; |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | private static int getBucketizedExpireIn(long expireAt) { |
| 107 | if (expireAt == Long.MAX_VALUE) { |
| 108 | return LocationStatsEnums.EXPIRATION_NO_EXPIRY; |
| 109 | } |
| 110 | |
| 111 | long elapsedRealtime = SystemClock.elapsedRealtime(); |
| 112 | long expireIn = Math.max(0, expireAt - elapsedRealtime); |
| 113 | |
| 114 | if (expireIn < 20 * ONE_SEC_IN_MILLIS) { |
| 115 | return LocationStatsEnums.EXPIRATION_BETWEEN_0_AND_20_SEC; |
| 116 | } else if (expireIn < ONE_MINUTE_IN_MILLIS) { |
| 117 | return LocationStatsEnums.EXPIRATION_BETWEEN_20_SEC_AND_1_MIN; |
| 118 | } else if (expireIn < ONE_MINUTE_IN_MILLIS * 10) { |
| 119 | return LocationStatsEnums.EXPIRATION_BETWEEN_1_MIN_AND_10_MIN; |
| 120 | } else if (expireIn < ONE_HOUR_IN_MILLIS) { |
| 121 | return LocationStatsEnums.EXPIRATION_BETWEEN_10_MIN_AND_1_HOUR; |
| 122 | } else { |
| 123 | return LocationStatsEnums.EXPIRATION_LARGER_THAN_1_HOUR; |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | private static int categorizeActivityImportance(int importance) { |
| 128 | if (importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) { |
| 129 | return LocationStatsEnums.IMPORTANCE_TOP; |
| 130 | } else if (importance == ActivityManager |
| 131 | .RunningAppProcessInfo |
| 132 | .IMPORTANCE_FOREGROUND_SERVICE) { |
| 133 | return LocationStatsEnums.IMPORTANCE_FORGROUND_SERVICE; |
| 134 | } else { |
| 135 | return LocationStatsEnums.IMPORTANCE_BACKGROUND; |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | private static int getCallbackType( |
| 140 | int apiType, boolean hasListener, boolean hasIntent) { |
| 141 | if (apiType == LocationStatsEnums.API_SEND_EXTRA_COMMAND) { |
| 142 | return LocationStatsEnums.CALLBACK_NOT_APPLICABLE; |
| 143 | } |
| 144 | |
| 145 | // Listener and PendingIntent will not be set at |
| 146 | // the same time. |
| 147 | if (hasIntent) { |
| 148 | return LocationStatsEnums.CALLBACK_PENDING_INTENT; |
| 149 | } else if (hasListener) { |
| 150 | return LocationStatsEnums.CALLBACK_LISTENER; |
| 151 | } else { |
| 152 | return LocationStatsEnums.CALLBACK_UNKNOWN; |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | // Update the hourly count of APIUsage log event. |
| 157 | // Returns false if hit the hourly log cap. |
| 158 | private boolean checkApiUsageLogCap() { |
| 159 | if (D) { |
| 160 | Log.d(TAG, "checking APIUsage log cap."); |
| 161 | } |
| 162 | |
| 163 | long currentHour = Instant.now().toEpochMilli() / ONE_HOUR_IN_MILLIS; |
| 164 | if (currentHour > mLastApiUsageLogHour) { |
| 165 | mLastApiUsageLogHour = currentHour; |
| 166 | mApiUsageLogHourlyCount = 0; |
| 167 | return true; |
| 168 | } else { |
| 169 | mApiUsageLogHourlyCount = Math.min( |
| 170 | mApiUsageLogHourlyCount + 1, API_USAGE_LOG_HOURLY_CAP); |
| 171 | return mApiUsageLogHourlyCount < API_USAGE_LOG_HOURLY_CAP; |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | /** |
| 176 | * Log a Location API usage event to Statsd. |
| 177 | * Logging event is capped at 60 per hour. Usage events exceeding |
| 178 | * the cap will be dropped by LocationUsageLogger. |
| 179 | */ |
| 180 | public void logLocationApiUsage(int usageType, int apiInUse, |
| 181 | String packageName, LocationRequest locationRequest, |
| 182 | boolean hasListener, boolean hasIntent, |
| 183 | float radius, int activityImportance) { |
| 184 | try { |
| 185 | if (!checkApiUsageLogCap()) { |
| 186 | return; |
| 187 | } |
| 188 | |
| 189 | boolean isLocationRequestNull = locationRequest == null; |
| 190 | if (D) { |
| 191 | Log.d(TAG, "log API Usage to statsd. usageType: " + usageType + ", apiInUse: " |
| 192 | + apiInUse + ", packageName: " + (packageName == null ? "" : packageName) |
| 193 | + ", locationRequest: " |
| 194 | + (isLocationRequestNull ? "" : locationRequest.toString()) |
| 195 | + ", hasListener: " + hasListener |
| 196 | + ", hasIntent: " + hasIntent |
| 197 | + ", radius: " + radius |
| 198 | + ", importance: " + activityImportance); |
| 199 | } |
| 200 | |
| 201 | StatsLog.write(StatsLog.LOCATION_MANAGER_API_USAGE_REPORTED, usageType, |
| 202 | apiInUse, packageName, |
| 203 | isLocationRequestNull |
| 204 | ? LocationStatsEnums.PROVIDER_UNKNOWN |
| 205 | : providerNameToStatsdEnum(locationRequest.getProvider()), |
| 206 | isLocationRequestNull |
| 207 | ? LocationStatsEnums.QUALITY_UNKNOWN |
| 208 | : locationRequest.getQuality(), |
| 209 | isLocationRequestNull |
| 210 | ? LocationStatsEnums.INTERVAL_UNKNOWN |
| 211 | : bucketizeIntervalToStatsdEnum(locationRequest.getInterval()), |
| 212 | isLocationRequestNull |
| 213 | ? LocationStatsEnums.DISTANCE_UNKNOWN |
| 214 | : bucketizeSmallestDisplacementToStatsdEnum( |
| 215 | locationRequest.getSmallestDisplacement()), |
| 216 | isLocationRequestNull ? 0 : locationRequest.getNumUpdates(), |
| 217 | // only log expireIn for USAGE_STARTED |
| 218 | isLocationRequestNull || usageType == LocationStatsEnums.USAGE_ENDED |
| 219 | ? LocationStatsEnums.EXPIRATION_UNKNOWN |
| 220 | : getBucketizedExpireIn(locationRequest.getExpireAt()), |
| 221 | getCallbackType(apiInUse, hasListener, hasIntent), |
| 222 | bucketizeRadiusToStatsdEnum(radius), |
| 223 | categorizeActivityImportance(activityImportance)); |
| 224 | } catch (Exception e) { |
| 225 | // Swallow exceptions to avoid crashing LMS. |
| 226 | Log.w(TAG, "Failed to log API usage to statsd.", e); |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | /** |
| 231 | * Log a Location API usage event to Statsd. |
| 232 | * Logging event is capped at 60 per hour. Usage events exceeding |
| 233 | * the cap will be dropped by LocationUsageLogger. |
| 234 | */ |
| 235 | public void logLocationApiUsage(int usageType, int apiInUse, String providerName) { |
| 236 | try { |
| 237 | if (!checkApiUsageLogCap()) { |
| 238 | return; |
| 239 | } |
| 240 | |
| 241 | if (D) { |
| 242 | Log.d(TAG, "log API Usage to statsd. usageType: " + usageType + ", apiInUse: " |
| 243 | + apiInUse + ", providerName: " + providerName); |
| 244 | } |
| 245 | |
| 246 | StatsLog.write(StatsLog.LOCATION_MANAGER_API_USAGE_REPORTED, usageType, apiInUse, |
| 247 | /* package_name= */ null, |
| 248 | providerNameToStatsdEnum(providerName), |
| 249 | LocationStatsEnums.QUALITY_UNKNOWN, |
| 250 | LocationStatsEnums.INTERVAL_UNKNOWN, |
| 251 | LocationStatsEnums.DISTANCE_UNKNOWN, |
| 252 | /* numUpdates= */ 0, |
| 253 | LocationStatsEnums.EXPIRATION_UNKNOWN, |
| 254 | getCallbackType( |
| 255 | apiInUse, |
| 256 | /* isListenerNull= */ true, |
| 257 | /* isIntentNull= */ true), |
| 258 | /* bucketizedRadius= */ 0, |
| 259 | LocationStatsEnums.IMPORTANCE_UNKNOWN); |
| 260 | } catch (Exception e) { |
| 261 | // Swallow exceptions to avoid crashing LMS. |
| 262 | Log.w(TAG, "Failed to log API usage to statsd.", e); |
| 263 | } |
| 264 | } |
| 265 | } |