JobSchedulerService.java revision 48a30db75dd0eedf8e065c89825b2af86a381b62
1/* 2 * Copyright (C) 2014 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 17package com.android.server.job; 18 19import java.io.FileDescriptor; 20import java.io.PrintWriter; 21import java.util.ArrayList; 22import java.util.Iterator; 23import java.util.List; 24 25import android.app.AppGlobals; 26import android.app.job.JobInfo; 27import android.app.job.JobScheduler; 28import android.app.job.JobService; 29import android.app.job.IJobScheduler; 30import android.content.BroadcastReceiver; 31import android.content.ComponentName; 32import android.content.Context; 33import android.content.Intent; 34import android.content.IntentFilter; 35import android.content.pm.IPackageManager; 36import android.content.pm.PackageManager; 37import android.content.pm.ServiceInfo; 38import android.os.BatteryStats; 39import android.os.Binder; 40import android.os.Handler; 41import android.os.Looper; 42import android.os.Message; 43import android.os.RemoteException; 44import android.os.ServiceManager; 45import android.os.SystemClock; 46import android.os.UserHandle; 47import android.util.ArraySet; 48import android.util.Slog; 49import android.util.SparseArray; 50 51import com.android.internal.app.IBatteryStats; 52import com.android.server.job.controllers.BatteryController; 53import com.android.server.job.controllers.ConnectivityController; 54import com.android.server.job.controllers.IdleController; 55import com.android.server.job.controllers.JobStatus; 56import com.android.server.job.controllers.StateController; 57import com.android.server.job.controllers.TimeController; 58 59/** 60 * Responsible for taking jobs representing work to be performed by a client app, and determining 61 * based on the criteria specified when that job should be run against the client application's 62 * endpoint. 63 * Implements logic for scheduling, and rescheduling jobs. The JobSchedulerService knows nothing 64 * about constraints, or the state of active jobs. It receives callbacks from the various 65 * controllers and completed jobs and operates accordingly. 66 * 67 * Note on locking: Any operations that manipulate {@link #mJobs} need to lock on that object. 68 * Any function with the suffix 'Locked' also needs to lock on {@link #mJobs}. 69 * @hide 70 */ 71public class JobSchedulerService extends com.android.server.SystemService 72 implements StateChangedListener, JobCompletedListener { 73 // TODO: Switch this off for final version. 74 static final boolean DEBUG = true; 75 /** The number of concurrent jobs we run at one time. */ 76 private static final int MAX_JOB_CONTEXTS_COUNT = 3; 77 static final String TAG = "JobSchedulerService"; 78 /** Master list of jobs. */ 79 final JobStore mJobs; 80 81 static final int MSG_JOB_EXPIRED = 0; 82 static final int MSG_CHECK_JOB = 1; 83 84 // Policy constants 85 /** 86 * Minimum # of idle jobs that must be ready in order to force the JMS to schedule things 87 * early. 88 */ 89 static final int MIN_IDLE_COUNT = 1; 90 /** 91 * Minimum # of charging jobs that must be ready in order to force the JMS to schedule things 92 * early. 93 */ 94 static final int MIN_CHARGING_COUNT = 1; 95 /** 96 * Minimum # of connectivity jobs that must be ready in order to force the JMS to schedule 97 * things early. 98 */ 99 static final int MIN_CONNECTIVITY_COUNT = 2; 100 /** 101 * Minimum # of jobs (with no particular constraints) for which the JMS will be happy running 102 * some work early. 103 * This is correlated with the amount of batching we'll be able to do. 104 */ 105 static final int MIN_READY_JOBS_COUNT = 2; 106 107 /** 108 * Track Services that have currently active or pending jobs. The index is provided by 109 * {@link JobStatus#getServiceToken()} 110 */ 111 final List<JobServiceContext> mActiveServices = new ArrayList<JobServiceContext>(); 112 /** List of controllers that will notify this service of updates to jobs. */ 113 List<StateController> mControllers; 114 /** 115 * Queue of pending jobs. The JobServiceContext class will receive jobs from this list 116 * when ready to execute them. 117 */ 118 final ArrayList<JobStatus> mPendingJobs = new ArrayList<JobStatus>(); 119 120 final ArrayList<Integer> mStartedUsers = new ArrayList(); 121 122 final JobHandler mHandler; 123 final JobSchedulerStub mJobSchedulerStub; 124 125 IBatteryStats mBatteryStats; 126 127 /** 128 * Set to true once we are allowed to run third party apps. 129 */ 130 boolean mReadyToRock; 131 132 /** 133 * Cleans up outstanding jobs when a package is removed. Even if it's being replaced later we 134 * still clean up. On reinstall the package will have a new uid. 135 */ 136 private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() { 137 @Override 138 public void onReceive(Context context, Intent intent) { 139 Slog.d(TAG, "Receieved: " + intent.getAction()); 140 if (Intent.ACTION_PACKAGE_REMOVED.equals(intent.getAction())) { 141 int uidRemoved = intent.getIntExtra(Intent.EXTRA_UID, -1); 142 if (DEBUG) { 143 Slog.d(TAG, "Removing jobs for uid: " + uidRemoved); 144 } 145 cancelJobsForUid(uidRemoved); 146 } else if (Intent.ACTION_USER_REMOVED.equals(intent.getAction())) { 147 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0); 148 if (DEBUG) { 149 Slog.d(TAG, "Removing jobs for user: " + userId); 150 } 151 cancelJobsForUser(userId); 152 } 153 } 154 }; 155 156 @Override 157 public void onStartUser(int userHandle) { 158 mStartedUsers.add(userHandle); 159 // Let's kick any outstanding jobs for this user. 160 mHandler.obtainMessage(MSG_CHECK_JOB).sendToTarget(); 161 } 162 163 @Override 164 public void onStopUser(int userHandle) { 165 mStartedUsers.remove(Integer.valueOf(userHandle)); 166 } 167 168 /** 169 * Entry point from client to schedule the provided job. 170 * This cancels the job if it's already been scheduled, and replaces it with the one provided. 171 * @param job JobInfo object containing execution parameters 172 * @param uId The package identifier of the application this job is for. 173 * @return Result of this operation. See <code>JobScheduler#RESULT_*</code> return codes. 174 */ 175 public int schedule(JobInfo job, int uId) { 176 JobStatus jobStatus = new JobStatus(job, uId); 177 cancelJob(uId, job.getId()); 178 startTrackingJob(jobStatus); 179 mHandler.obtainMessage(MSG_CHECK_JOB).sendToTarget(); 180 return JobScheduler.RESULT_SUCCESS; 181 } 182 183 public List<JobInfo> getPendingJobs(int uid) { 184 ArrayList<JobInfo> outList = new ArrayList<JobInfo>(); 185 synchronized (mJobs) { 186 ArraySet<JobStatus> jobs = mJobs.getJobs(); 187 for (int i=0; i<jobs.size(); i++) { 188 JobStatus job = jobs.valueAt(i); 189 if (job.getUid() == uid) { 190 outList.add(job.getJob()); 191 } 192 } 193 } 194 return outList; 195 } 196 197 private void cancelJobsForUser(int userHandle) { 198 List<JobStatus> jobsForUser; 199 synchronized (mJobs) { 200 jobsForUser = mJobs.getJobsByUser(userHandle); 201 } 202 for (int i=0; i<jobsForUser.size(); i++) { 203 JobStatus toRemove = jobsForUser.get(i); 204 cancelJobImpl(toRemove); 205 } 206 } 207 208 /** 209 * Entry point from client to cancel all jobs originating from their uid. 210 * This will remove the job from the master list, and cancel the job if it was staged for 211 * execution or being executed. 212 * @param uid Uid to check against for removal of a job. 213 */ 214 public void cancelJobsForUid(int uid) { 215 List<JobStatus> jobsForUid; 216 synchronized (mJobs) { 217 jobsForUid = mJobs.getJobsByUid(uid); 218 } 219 for (int i=0; i<jobsForUid.size(); i++) { 220 JobStatus toRemove = jobsForUid.get(i); 221 cancelJobImpl(toRemove); 222 } 223 } 224 225 /** 226 * Entry point from client to cancel the job corresponding to the jobId provided. 227 * This will remove the job from the master list, and cancel the job if it was staged for 228 * execution or being executed. 229 * @param uid Uid of the calling client. 230 * @param jobId Id of the job, provided at schedule-time. 231 */ 232 public void cancelJob(int uid, int jobId) { 233 JobStatus toCancel; 234 synchronized (mJobs) { 235 toCancel = mJobs.getJobByUidAndJobId(uid, jobId); 236 } 237 if (toCancel != null) { 238 cancelJobImpl(toCancel); 239 } 240 } 241 242 private void cancelJobImpl(JobStatus cancelled) { 243 if (DEBUG) { 244 Slog.d(TAG, "Cancelling: " + cancelled); 245 } 246 stopTrackingJob(cancelled); 247 synchronized (mJobs) { 248 // Remove from pending queue. 249 mPendingJobs.remove(cancelled); 250 // Cancel if running. 251 stopJobOnServiceContextLocked(cancelled); 252 } 253 } 254 255 /** 256 * Initializes the system service. 257 * <p> 258 * Subclasses must define a single argument constructor that accepts the context 259 * and passes it to super. 260 * </p> 261 * 262 * @param context The system server context. 263 */ 264 public JobSchedulerService(Context context) { 265 super(context); 266 // Create the controllers. 267 mControllers = new ArrayList<StateController>(); 268 mControllers.add(ConnectivityController.get(this)); 269 mControllers.add(TimeController.get(this)); 270 mControllers.add(IdleController.get(this)); 271 mControllers.add(BatteryController.get(this)); 272 273 mHandler = new JobHandler(context.getMainLooper()); 274 mJobSchedulerStub = new JobSchedulerStub(); 275 mJobs = JobStore.initAndGet(this); 276 } 277 278 @Override 279 public void onStart() { 280 publishBinderService(Context.JOB_SCHEDULER_SERVICE, mJobSchedulerStub); 281 } 282 283 @Override 284 public void onBootPhase(int phase) { 285 if (PHASE_SYSTEM_SERVICES_READY == phase) { 286 // Register br for package removals and user removals. 287 final IntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_REMOVED); 288 filter.addDataScheme("package"); 289 getContext().registerReceiverAsUser( 290 mBroadcastReceiver, UserHandle.ALL, filter, null, null); 291 final IntentFilter userFilter = new IntentFilter(Intent.ACTION_USER_REMOVED); 292 getContext().registerReceiverAsUser( 293 mBroadcastReceiver, UserHandle.ALL, userFilter, null, null); 294 } else if (phase == PHASE_THIRD_PARTY_APPS_CAN_START) { 295 synchronized (mJobs) { 296 // Let's go! 297 mReadyToRock = true; 298 mBatteryStats = IBatteryStats.Stub.asInterface(ServiceManager.getService( 299 BatteryStats.SERVICE_NAME)); 300 // Create the "runners". 301 for (int i = 0; i < MAX_JOB_CONTEXTS_COUNT; i++) { 302 mActiveServices.add( 303 new JobServiceContext(this, mBatteryStats, 304 getContext().getMainLooper())); 305 } 306 // Attach jobs to their controllers. 307 ArraySet<JobStatus> jobs = mJobs.getJobs(); 308 for (int i=0; i<jobs.size(); i++) { 309 JobStatus job = jobs.valueAt(i); 310 for (int controller=0; controller<mControllers.size(); controller++) { 311 mControllers.get(controller).maybeStartTrackingJob(job); 312 } 313 } 314 // GO GO GO! 315 mHandler.obtainMessage(MSG_CHECK_JOB).sendToTarget(); 316 } 317 } 318 } 319 320 /** 321 * Called when we have a job status object that we need to insert in our 322 * {@link com.android.server.job.JobStore}, and make sure all the relevant controllers know 323 * about. 324 */ 325 private void startTrackingJob(JobStatus jobStatus) { 326 boolean update; 327 boolean rocking; 328 synchronized (mJobs) { 329 update = mJobs.add(jobStatus); 330 rocking = mReadyToRock; 331 } 332 if (rocking) { 333 for (int i=0; i<mControllers.size(); i++) { 334 StateController controller = mControllers.get(i); 335 if (update) { 336 controller.maybeStopTrackingJob(jobStatus); 337 } 338 controller.maybeStartTrackingJob(jobStatus); 339 } 340 } 341 } 342 343 /** 344 * Called when we want to remove a JobStatus object that we've finished executing. Returns the 345 * object removed. 346 */ 347 private boolean stopTrackingJob(JobStatus jobStatus) { 348 boolean removed; 349 boolean rocking; 350 synchronized (mJobs) { 351 // Remove from store as well as controllers. 352 removed = mJobs.remove(jobStatus); 353 rocking = mReadyToRock; 354 } 355 if (removed && rocking) { 356 for (int i=0; i<mControllers.size(); i++) { 357 StateController controller = mControllers.get(i); 358 controller.maybeStopTrackingJob(jobStatus); 359 } 360 } 361 return removed; 362 } 363 364 private boolean stopJobOnServiceContextLocked(JobStatus job) { 365 for (int i=0; i<mActiveServices.size(); i++) { 366 JobServiceContext jsc = mActiveServices.get(i); 367 final JobStatus executing = jsc.getRunningJob(); 368 if (executing != null && executing.matches(job.getUid(), job.getJobId())) { 369 jsc.cancelExecutingJob(); 370 return true; 371 } 372 } 373 return false; 374 } 375 376 /** 377 * @param job JobStatus we are querying against. 378 * @return Whether or not the job represented by the status object is currently being run or 379 * is pending. 380 */ 381 private boolean isCurrentlyActiveLocked(JobStatus job) { 382 for (int i=0; i<mActiveServices.size(); i++) { 383 JobServiceContext serviceContext = mActiveServices.get(i); 384 final JobStatus running = serviceContext.getRunningJob(); 385 if (running != null && running.matches(job.getUid(), job.getJobId())) { 386 return true; 387 } 388 } 389 return false; 390 } 391 392 /** 393 * A job is rescheduled with exponential back-off if the client requests this from their 394 * execution logic. 395 * A caveat is for idle-mode jobs, for which the idle-mode constraint will usurp the 396 * timeliness of the reschedule. For an idle-mode job, no deadline is given. 397 * @param failureToReschedule Provided job status that we will reschedule. 398 * @return A newly instantiated JobStatus with the same constraints as the last job except 399 * with adjusted timing constraints. 400 */ 401 private JobStatus getRescheduleJobForFailure(JobStatus failureToReschedule) { 402 final long elapsedNowMillis = SystemClock.elapsedRealtime(); 403 final JobInfo job = failureToReschedule.getJob(); 404 405 final long initialBackoffMillis = job.getInitialBackoffMillis(); 406 final int backoffAttempts = failureToReschedule.getNumFailures() + 1; 407 long delayMillis; 408 409 switch (job.getBackoffPolicy()) { 410 case JobInfo.BACKOFF_POLICY_LINEAR: 411 delayMillis = initialBackoffMillis * backoffAttempts; 412 break; 413 default: 414 if (DEBUG) { 415 Slog.v(TAG, "Unrecognised back-off policy, defaulting to exponential."); 416 } 417 case JobInfo.BACKOFF_POLICY_EXPONENTIAL: 418 delayMillis = 419 (long) Math.scalb(initialBackoffMillis, backoffAttempts - 1); 420 break; 421 } 422 delayMillis = 423 Math.min(delayMillis, JobInfo.MAX_BACKOFF_DELAY_MILLIS); 424 return new JobStatus(failureToReschedule, elapsedNowMillis + delayMillis, 425 JobStatus.NO_LATEST_RUNTIME, backoffAttempts); 426 } 427 428 /** 429 * Called after a periodic has executed so we can to re-add it. We take the last execution time 430 * of the job to be the time of completion (i.e. the time at which this function is called). 431 * This could be inaccurate b/c the job can run for as long as 432 * {@link com.android.server.job.JobServiceContext#EXECUTING_TIMESLICE_MILLIS}, but will lead 433 * to underscheduling at least, rather than if we had taken the last execution time to be the 434 * start of the execution. 435 * @return A new job representing the execution criteria for this instantiation of the 436 * recurring job. 437 */ 438 private JobStatus getRescheduleJobForPeriodic(JobStatus periodicToReschedule) { 439 final long elapsedNow = SystemClock.elapsedRealtime(); 440 // Compute how much of the period is remaining. 441 long runEarly = Math.max(periodicToReschedule.getLatestRunTimeElapsed() - elapsedNow, 0); 442 long newEarliestRunTimeElapsed = elapsedNow + runEarly; 443 long period = periodicToReschedule.getJob().getIntervalMillis(); 444 long newLatestRuntimeElapsed = newEarliestRunTimeElapsed + period; 445 446 if (DEBUG) { 447 Slog.v(TAG, "Rescheduling executed periodic. New execution window [" + 448 newEarliestRunTimeElapsed/1000 + ", " + newLatestRuntimeElapsed/1000 + "]s"); 449 } 450 return new JobStatus(periodicToReschedule, newEarliestRunTimeElapsed, 451 newLatestRuntimeElapsed, 0 /* backoffAttempt */); 452 } 453 454 // JobCompletedListener implementations. 455 456 /** 457 * A job just finished executing. We fetch the 458 * {@link com.android.server.job.controllers.JobStatus} from the store and depending on 459 * whether we want to reschedule we readd it to the controllers. 460 * @param jobStatus Completed job. 461 * @param needsReschedule Whether the implementing class should reschedule this job. 462 */ 463 @Override 464 public void onJobCompleted(JobStatus jobStatus, boolean needsReschedule) { 465 if (DEBUG) { 466 Slog.d(TAG, "Completed " + jobStatus + ", reschedule=" + needsReschedule); 467 } 468 if (!stopTrackingJob(jobStatus)) { 469 if (DEBUG) { 470 Slog.d(TAG, "Could not find job to remove. Was job removed while executing?"); 471 } 472 return; 473 } 474 if (needsReschedule) { 475 JobStatus rescheduled = getRescheduleJobForFailure(jobStatus); 476 startTrackingJob(rescheduled); 477 } else if (jobStatus.getJob().isPeriodic()) { 478 JobStatus rescheduledPeriodic = getRescheduleJobForPeriodic(jobStatus); 479 startTrackingJob(rescheduledPeriodic); 480 } 481 mHandler.obtainMessage(MSG_CHECK_JOB).sendToTarget(); 482 } 483 484 // StateChangedListener implementations. 485 486 /** 487 * Posts a message to the {@link com.android.server.job.JobSchedulerService.JobHandler} that 488 * some controller's state has changed, so as to run through the list of jobs and start/stop 489 * any that are eligible. 490 */ 491 @Override 492 public void onControllerStateChanged() { 493 mHandler.obtainMessage(MSG_CHECK_JOB).sendToTarget(); 494 } 495 496 @Override 497 public void onRunJobNow(JobStatus jobStatus) { 498 mHandler.obtainMessage(MSG_JOB_EXPIRED, jobStatus).sendToTarget(); 499 } 500 501 private class JobHandler extends Handler { 502 503 public JobHandler(Looper looper) { 504 super(looper); 505 } 506 507 @Override 508 public void handleMessage(Message message) { 509 synchronized (mJobs) { 510 if (!mReadyToRock) { 511 return; 512 } 513 } 514 switch (message.what) { 515 case MSG_JOB_EXPIRED: 516 synchronized (mJobs) { 517 JobStatus runNow = (JobStatus) message.obj; 518 // runNow can be null, which is a controller's way of indicating that its 519 // state is such that all ready jobs should be run immediately. 520 if (runNow != null && !mPendingJobs.contains(runNow) 521 && mJobs.containsJob(runNow)) { 522 mPendingJobs.add(runNow); 523 } 524 queueReadyJobsForExecutionLockedH(); 525 } 526 break; 527 case MSG_CHECK_JOB: 528 synchronized (mJobs) { 529 // Check the list of jobs and run some of them if we feel inclined. 530 maybeQueueReadyJobsForExecutionLockedH(); 531 } 532 break; 533 } 534 maybeRunPendingJobsH(); 535 // Don't remove JOB_EXPIRED in case one came along while processing the queue. 536 removeMessages(MSG_CHECK_JOB); 537 } 538 539 /** 540 * Run through list of jobs and execute all possible - at least one is expired so we do 541 * as many as we can. 542 */ 543 private void queueReadyJobsForExecutionLockedH() { 544 ArraySet<JobStatus> jobs = mJobs.getJobs(); 545 if (DEBUG) { 546 Slog.d(TAG, "queuing all ready jobs for execution:"); 547 } 548 for (int i=0; i<jobs.size(); i++) { 549 JobStatus job = jobs.valueAt(i); 550 if (isReadyToBeExecutedLocked(job)) { 551 if (DEBUG) { 552 Slog.d(TAG, " queued " + job.toShortString()); 553 } 554 mPendingJobs.add(job); 555 } else if (isReadyToBeCancelledLocked(job)) { 556 stopJobOnServiceContextLocked(job); 557 } 558 } 559 if (DEBUG) { 560 final int queuedJobs = mPendingJobs.size(); 561 if (queuedJobs == 0) { 562 Slog.d(TAG, "No jobs pending."); 563 } else { 564 Slog.d(TAG, queuedJobs + " jobs queued."); 565 } 566 } 567 } 568 569 /** 570 * The state of at least one job has changed. Here is where we could enforce various 571 * policies on when we want to execute jobs. 572 * Right now the policy is such: 573 * If >1 of the ready jobs is idle mode we send all of them off 574 * if more than 2 network connectivity jobs are ready we send them all off. 575 * If more than 4 jobs total are ready we send them all off. 576 * TODO: It would be nice to consolidate these sort of high-level policies somewhere. 577 */ 578 private void maybeQueueReadyJobsForExecutionLockedH() { 579 int chargingCount = 0; 580 int idleCount = 0; 581 int backoffCount = 0; 582 int connectivityCount = 0; 583 List<JobStatus> runnableJobs = new ArrayList<JobStatus>(); 584 ArraySet<JobStatus> jobs = mJobs.getJobs(); 585 for (int i=0; i<jobs.size(); i++) { 586 JobStatus job = jobs.valueAt(i); 587 if (isReadyToBeExecutedLocked(job)) { 588 if (job.getNumFailures() > 0) { 589 backoffCount++; 590 } 591 if (job.hasIdleConstraint()) { 592 idleCount++; 593 } 594 if (job.hasConnectivityConstraint() || job.hasUnmeteredConstraint()) { 595 connectivityCount++; 596 } 597 if (job.hasChargingConstraint()) { 598 chargingCount++; 599 } 600 runnableJobs.add(job); 601 } else if (isReadyToBeCancelledLocked(job)) { 602 stopJobOnServiceContextLocked(job); 603 } 604 } 605 if (backoffCount > 0 || 606 idleCount >= MIN_IDLE_COUNT || 607 connectivityCount >= MIN_CONNECTIVITY_COUNT || 608 chargingCount >= MIN_CHARGING_COUNT || 609 runnableJobs.size() >= MIN_READY_JOBS_COUNT) { 610 if (DEBUG) { 611 Slog.d(TAG, "maybeQueueReadyJobsForExecutionLockedH: Running jobs."); 612 } 613 for (int i=0; i<runnableJobs.size(); i++) { 614 mPendingJobs.add(runnableJobs.get(i)); 615 } 616 } else { 617 if (DEBUG) { 618 Slog.d(TAG, "maybeQueueReadyJobsForExecutionLockedH: Not running anything."); 619 } 620 } 621 if (DEBUG) { 622 Slog.d(TAG, "idle=" + idleCount + " connectivity=" + 623 connectivityCount + " charging=" + chargingCount + " tot=" + 624 runnableJobs.size()); 625 } 626 } 627 628 /** 629 * Criteria for moving a job into the pending queue: 630 * - It's ready. 631 * - It's not pending. 632 * - It's not already running on a JSC. 633 * - The user that requested the job is running. 634 */ 635 private boolean isReadyToBeExecutedLocked(JobStatus job) { 636 final boolean jobReady = job.isReady(); 637 final boolean jobPending = mPendingJobs.contains(job); 638 final boolean jobActive = isCurrentlyActiveLocked(job); 639 final boolean userRunning = mStartedUsers.contains(job.getUserId()); 640 641 if (DEBUG) { 642 Slog.v(TAG, "isReadyToBeExecutedLocked: " + job.toShortString() 643 + " ready=" + jobReady + " pending=" + jobPending 644 + " active=" + jobActive + " userRunning=" + userRunning); 645 } 646 return userRunning && jobReady && !jobPending && !jobActive; 647 } 648 649 /** 650 * Criteria for cancelling an active job: 651 * - It's not ready 652 * - It's running on a JSC. 653 */ 654 private boolean isReadyToBeCancelledLocked(JobStatus job) { 655 return !job.isReady() && isCurrentlyActiveLocked(job); 656 } 657 658 /** 659 * Reconcile jobs in the pending queue against available execution contexts. 660 * A controller can force a job into the pending queue even if it's already running, but 661 * here is where we decide whether to actually execute it. 662 */ 663 private void maybeRunPendingJobsH() { 664 synchronized (mJobs) { 665 Iterator<JobStatus> it = mPendingJobs.iterator(); 666 if (DEBUG) { 667 Slog.d(TAG, "pending queue: " + mPendingJobs.size() + " jobs."); 668 } 669 while (it.hasNext()) { 670 JobStatus nextPending = it.next(); 671 JobServiceContext availableContext = null; 672 for (int i=0; i<mActiveServices.size(); i++) { 673 JobServiceContext jsc = mActiveServices.get(i); 674 final JobStatus running = jsc.getRunningJob(); 675 if (running != null && running.matches(nextPending.getUid(), 676 nextPending.getJobId())) { 677 // Already running this job for this uId, skip. 678 availableContext = null; 679 break; 680 } 681 if (jsc.isAvailable()) { 682 availableContext = jsc; 683 } 684 } 685 if (availableContext != null) { 686 if (!availableContext.executeRunnableJob(nextPending)) { 687 if (DEBUG) { 688 Slog.d(TAG, "Error executing " + nextPending); 689 } 690 mJobs.remove(nextPending); 691 } 692 it.remove(); 693 } 694 } 695 } 696 } 697 } 698 699 /** 700 * Binder stub trampoline implementation 701 */ 702 final class JobSchedulerStub extends IJobScheduler.Stub { 703 /** Cache determination of whether a given app can persist jobs 704 * key is uid of the calling app; value is undetermined/true/false 705 */ 706 private final SparseArray<Boolean> mPersistCache = new SparseArray<Boolean>(); 707 708 // Enforce that only the app itself (or shared uid participant) can schedule a 709 // job that runs one of the app's services, as well as verifying that the 710 // named service properly requires the BIND_JOB_SERVICE permission 711 private void enforceValidJobRequest(int uid, JobInfo job) { 712 final IPackageManager pm = AppGlobals.getPackageManager(); 713 final ComponentName service = job.getService(); 714 try { 715 ServiceInfo si = pm.getServiceInfo(service, 0, UserHandle.getUserId(uid)); 716 if (si == null) { 717 throw new IllegalArgumentException("No such service " + service); 718 } 719 if (si.applicationInfo.uid != uid) { 720 throw new IllegalArgumentException("uid " + uid + 721 " cannot schedule job in " + service.getPackageName()); 722 } 723 if (!JobService.PERMISSION_BIND.equals(si.permission)) { 724 throw new IllegalArgumentException("Scheduled service " + service 725 + " does not require android.permission.BIND_JOB_SERVICE permission"); 726 } 727 } catch (RemoteException e) { 728 // Can't happen; the Package Manager is in this same process 729 } 730 } 731 732 private boolean canPersistJobs(int pid, int uid) { 733 // If we get this far we're good to go; all we need to do now is check 734 // whether the app is allowed to persist its scheduled work. 735 final boolean canPersist; 736 synchronized (mPersistCache) { 737 Boolean cached = mPersistCache.get(uid); 738 if (cached != null) { 739 canPersist = cached.booleanValue(); 740 } else { 741 // Persisting jobs is tantamount to running at boot, so we permit 742 // it when the app has declared that it uses the RECEIVE_BOOT_COMPLETED 743 // permission 744 int result = getContext().checkPermission( 745 android.Manifest.permission.RECEIVE_BOOT_COMPLETED, pid, uid); 746 canPersist = (result == PackageManager.PERMISSION_GRANTED); 747 mPersistCache.put(uid, canPersist); 748 } 749 } 750 return canPersist; 751 } 752 753 // IJobScheduler implementation 754 @Override 755 public int schedule(JobInfo job) throws RemoteException { 756 if (DEBUG) { 757 Slog.d(TAG, "Scheduling job: " + job.toString()); 758 } 759 final int pid = Binder.getCallingPid(); 760 final int uid = Binder.getCallingUid(); 761 762 enforceValidJobRequest(uid, job); 763 if (job.isPersisted()) { 764 if (!canPersistJobs(pid, uid)) { 765 throw new IllegalArgumentException("Error: requested job be persisted without" 766 + " holding RECEIVE_BOOT_COMPLETED permission."); 767 } 768 } 769 770 long ident = Binder.clearCallingIdentity(); 771 try { 772 return JobSchedulerService.this.schedule(job, uid); 773 } finally { 774 Binder.restoreCallingIdentity(ident); 775 } 776 } 777 778 @Override 779 public List<JobInfo> getAllPendingJobs() throws RemoteException { 780 final int uid = Binder.getCallingUid(); 781 782 long ident = Binder.clearCallingIdentity(); 783 try { 784 return JobSchedulerService.this.getPendingJobs(uid); 785 } finally { 786 Binder.restoreCallingIdentity(ident); 787 } 788 } 789 790 @Override 791 public void cancelAll() throws RemoteException { 792 final int uid = Binder.getCallingUid(); 793 794 long ident = Binder.clearCallingIdentity(); 795 try { 796 JobSchedulerService.this.cancelJobsForUid(uid); 797 } finally { 798 Binder.restoreCallingIdentity(ident); 799 } 800 } 801 802 @Override 803 public void cancel(int jobId) throws RemoteException { 804 final int uid = Binder.getCallingUid(); 805 806 long ident = Binder.clearCallingIdentity(); 807 try { 808 JobSchedulerService.this.cancelJob(uid, jobId); 809 } finally { 810 Binder.restoreCallingIdentity(ident); 811 } 812 } 813 814 /** 815 * "dumpsys" infrastructure 816 */ 817 @Override 818 public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 819 getContext().enforceCallingOrSelfPermission(android.Manifest.permission.DUMP, TAG); 820 821 long identityToken = Binder.clearCallingIdentity(); 822 try { 823 JobSchedulerService.this.dumpInternal(pw); 824 } finally { 825 Binder.restoreCallingIdentity(identityToken); 826 } 827 } 828 }; 829 830 void dumpInternal(PrintWriter pw) { 831 final long now = SystemClock.elapsedRealtime(); 832 synchronized (mJobs) { 833 pw.print("Started users: "); 834 for (int i=0; i<mStartedUsers.size(); i++) { 835 pw.print("u" + mStartedUsers.get(i) + " "); 836 } 837 pw.println(); 838 pw.println("Registered jobs:"); 839 if (mJobs.size() > 0) { 840 ArraySet<JobStatus> jobs = mJobs.getJobs(); 841 for (int i=0; i<jobs.size(); i++) { 842 JobStatus job = jobs.valueAt(i); 843 job.dump(pw, " "); 844 } 845 } else { 846 pw.println(" None."); 847 } 848 for (int i=0; i<mControllers.size(); i++) { 849 pw.println(); 850 mControllers.get(i).dumpControllerState(pw); 851 } 852 pw.println(); 853 pw.println("Pending:"); 854 for (int i=0; i<mPendingJobs.size(); i++) { 855 pw.println(mPendingJobs.get(i).hashCode()); 856 } 857 pw.println(); 858 pw.println("Active jobs:"); 859 for (int i=0; i<mActiveServices.size(); i++) { 860 JobServiceContext jsc = mActiveServices.get(i); 861 if (jsc.isAvailable()) { 862 continue; 863 } else { 864 final long timeout = jsc.getTimeoutElapsed(); 865 pw.print("Running for: "); 866 pw.print((now - jsc.getExecutionStartTimeElapsed())/1000); 867 pw.print("s timeout="); 868 pw.print(timeout); 869 pw.print(" fromnow="); 870 pw.println(timeout-now); 871 jsc.getRunningJob().dump(pw, " "); 872 } 873 } 874 pw.println(); 875 pw.print("mReadyToRock="); pw.println(mReadyToRock); 876 } 877 pw.println(); 878 } 879} 880