JobSchedulerService.java revision ee410da42b6b8352213f03f7725fd041f703b035
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 = "JobManagerService"; 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 connectivity jobs that must be ready in order to force the JMS to schedule 92 * things early. 93 */ 94 static final int MIN_CONNECTIVITY_COUNT = 2; 95 /** 96 * Minimum # of jobs (with no particular constraints) for which the JMS will be happy running 97 * some work early. 98 */ 99 static final int MIN_READY_JOBS_COUNT = 4; 100 101 /** 102 * Track Services that have currently active or pending jobs. The index is provided by 103 * {@link JobStatus#getServiceToken()} 104 */ 105 final List<JobServiceContext> mActiveServices = new ArrayList<JobServiceContext>(); 106 /** List of controllers that will notify this service of updates to jobs. */ 107 List<StateController> mControllers; 108 /** 109 * Queue of pending jobs. The JobServiceContext class will receive jobs from this list 110 * when ready to execute them. 111 */ 112 final ArrayList<JobStatus> mPendingJobs = new ArrayList<JobStatus>(); 113 114 final JobHandler mHandler; 115 final JobSchedulerStub mJobSchedulerStub; 116 117 IBatteryStats mBatteryStats; 118 119 /** 120 * Set to true once we are allowed to run third party apps. 121 */ 122 boolean mReadyToRock; 123 124 /** 125 * Cleans up outstanding jobs when a package is removed. Even if it's being replaced later we 126 * still clean up. On reinstall the package will have a new uid. 127 */ 128 private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() { 129 @Override 130 public void onReceive(Context context, Intent intent) { 131 Slog.d(TAG, "Receieved: " + intent.getAction()); 132 if (Intent.ACTION_PACKAGE_REMOVED.equals(intent.getAction())) { 133 int uidRemoved = intent.getIntExtra(Intent.EXTRA_UID, -1); 134 if (DEBUG) { 135 Slog.d(TAG, "Removing jobs for uid: " + uidRemoved); 136 } 137 cancelJobsForUid(uidRemoved); 138 } else if (Intent.ACTION_USER_REMOVED.equals(intent.getAction())) { 139 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0); 140 if (DEBUG) { 141 Slog.d(TAG, "Removing jobs for user: " + userId); 142 } 143 cancelJobsForUser(userId); 144 } 145 } 146 }; 147 148 /** 149 * Entry point from client to schedule the provided job. 150 * This cancels the job if it's already been scheduled, and replaces it with the one provided. 151 * @param job JobInfo object containing execution parameters 152 * @param uId The package identifier of the application this job is for. 153 * @return Result of this operation. See <code>JobScheduler#RESULT_*</code> return codes. 154 */ 155 public int schedule(JobInfo job, int uId) { 156 JobStatus jobStatus = new JobStatus(job, uId); 157 cancelJob(uId, job.getId()); 158 startTrackingJob(jobStatus); 159 return JobScheduler.RESULT_SUCCESS; 160 } 161 162 public List<JobInfo> getPendingJobs(int uid) { 163 ArrayList<JobInfo> outList = new ArrayList<JobInfo>(); 164 synchronized (mJobs) { 165 ArraySet<JobStatus> jobs = mJobs.getJobs(); 166 for (int i=0; i<jobs.size(); i++) { 167 JobStatus job = jobs.valueAt(i); 168 if (job.getUid() == uid) { 169 outList.add(job.getJob()); 170 } 171 } 172 } 173 return outList; 174 } 175 176 private void cancelJobsForUser(int userHandle) { 177 synchronized (mJobs) { 178 List<JobStatus> jobsForUser = mJobs.getJobsByUser(userHandle); 179 for (int i=0; i<jobsForUser.size(); i++) { 180 JobStatus toRemove = jobsForUser.get(i); 181 if (DEBUG) { 182 Slog.d(TAG, "Cancelling: " + toRemove); 183 } 184 cancelJobLocked(toRemove); 185 } 186 } 187 } 188 189 /** 190 * Entry point from client to cancel all jobs originating from their uid. 191 * This will remove the job from the master list, and cancel the job if it was staged for 192 * execution or being executed. 193 * @param uid To check against for removal of a job. 194 */ 195 public void cancelJobsForUid(int uid) { 196 // Remove from master list. 197 synchronized (mJobs) { 198 List<JobStatus> jobsForUid = mJobs.getJobsByUid(uid); 199 for (int i=0; i<jobsForUid.size(); i++) { 200 JobStatus toRemove = jobsForUid.get(i); 201 if (DEBUG) { 202 Slog.d(TAG, "Cancelling: " + toRemove); 203 } 204 cancelJobLocked(toRemove); 205 } 206 } 207 } 208 209 /** 210 * Entry point from client to cancel the job corresponding to the jobId provided. 211 * This will remove the job from the master list, and cancel the job if it was staged for 212 * execution or being executed. 213 * @param uid Uid of the calling client. 214 * @param jobId Id of the job, provided at schedule-time. 215 */ 216 public void cancelJob(int uid, int jobId) { 217 JobStatus toCancel; 218 synchronized (mJobs) { 219 toCancel = mJobs.getJobByUidAndJobId(uid, jobId); 220 if (toCancel != null) { 221 cancelJobLocked(toCancel); 222 } 223 } 224 } 225 226 private void cancelJobLocked(JobStatus cancelled) { 227 if (DEBUG) { 228 Slog.d(TAG, "Cancelling: " + cancelled); 229 } 230 // Remove from store. 231 stopTrackingJob(cancelled); 232 // Remove from pending queue. 233 mPendingJobs.remove(cancelled); 234 // Cancel if running. 235 stopJobOnServiceContextLocked(cancelled); 236 } 237 238 /** 239 * Initializes the system service. 240 * <p> 241 * Subclasses must define a single argument constructor that accepts the context 242 * and passes it to super. 243 * </p> 244 * 245 * @param context The system server context. 246 */ 247 public JobSchedulerService(Context context) { 248 super(context); 249 // Create the controllers. 250 mControllers = new ArrayList<StateController>(); 251 mControllers.add(ConnectivityController.get(this)); 252 mControllers.add(TimeController.get(this)); 253 mControllers.add(IdleController.get(this)); 254 mControllers.add(BatteryController.get(this)); 255 256 mHandler = new JobHandler(context.getMainLooper()); 257 mJobSchedulerStub = new JobSchedulerStub(); 258 mJobs = JobStore.initAndGet(this); 259 } 260 261 @Override 262 public void onStart() { 263 publishBinderService(Context.JOB_SCHEDULER_SERVICE, mJobSchedulerStub); 264 } 265 266 @Override 267 public void onBootPhase(int phase) { 268 if (PHASE_SYSTEM_SERVICES_READY == phase) { 269 // Register br for package removals and user removals. 270 final IntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_REMOVED); 271 filter.addDataScheme("package"); 272 getContext().registerReceiverAsUser( 273 mBroadcastReceiver, UserHandle.ALL, filter, null, null); 274 final IntentFilter userFilter = new IntentFilter(Intent.ACTION_USER_REMOVED); 275 getContext().registerReceiverAsUser( 276 mBroadcastReceiver, UserHandle.ALL, userFilter, null, null); 277 } else if (phase == PHASE_THIRD_PARTY_APPS_CAN_START) { 278 synchronized (mJobs) { 279 // Let's go! 280 mReadyToRock = true; 281 mBatteryStats = IBatteryStats.Stub.asInterface(ServiceManager.getService( 282 BatteryStats.SERVICE_NAME)); 283 // Create the "runners". 284 for (int i = 0; i < MAX_JOB_CONTEXTS_COUNT; i++) { 285 mActiveServices.add( 286 new JobServiceContext(this, mBatteryStats, 287 getContext().getMainLooper())); 288 } 289 // Attach jobs to their controllers. 290 ArraySet<JobStatus> jobs = mJobs.getJobs(); 291 for (int i=0; i<jobs.size(); i++) { 292 JobStatus job = jobs.valueAt(i); 293 for (int controller=0; controller<mControllers.size(); controller++) { 294 mControllers.get(controller).maybeStartTrackingJob(job); 295 } 296 } 297 // GO GO GO! 298 mHandler.obtainMessage(MSG_CHECK_JOB).sendToTarget(); 299 } 300 } 301 } 302 303 /** 304 * Called when we have a job status object that we need to insert in our 305 * {@link com.android.server.job.JobStore}, and make sure all the relevant controllers know 306 * about. 307 */ 308 private void startTrackingJob(JobStatus jobStatus) { 309 boolean update; 310 boolean rocking; 311 synchronized (mJobs) { 312 update = mJobs.add(jobStatus); 313 rocking = mReadyToRock; 314 } 315 if (rocking) { 316 for (int i=0; i<mControllers.size(); i++) { 317 StateController controller = mControllers.get(i); 318 if (update) { 319 controller.maybeStopTrackingJob(jobStatus); 320 } 321 controller.maybeStartTrackingJob(jobStatus); 322 } 323 } 324 } 325 326 /** 327 * Called when we want to remove a JobStatus object that we've finished executing. Returns the 328 * object removed. 329 */ 330 private boolean stopTrackingJob(JobStatus jobStatus) { 331 boolean removed; 332 boolean rocking; 333 synchronized (mJobs) { 334 // Remove from store as well as controllers. 335 removed = mJobs.remove(jobStatus); 336 rocking = mReadyToRock; 337 } 338 if (removed && rocking) { 339 for (int i=0; i<mControllers.size(); i++) { 340 StateController controller = mControllers.get(i); 341 controller.maybeStopTrackingJob(jobStatus); 342 } 343 } 344 return removed; 345 } 346 347 private boolean stopJobOnServiceContextLocked(JobStatus job) { 348 for (int i=0; i<mActiveServices.size(); i++) { 349 JobServiceContext jsc = mActiveServices.get(i); 350 final JobStatus executing = jsc.getRunningJob(); 351 if (executing != null && executing.matches(job.getUid(), job.getJobId())) { 352 jsc.cancelExecutingJob(); 353 return true; 354 } 355 } 356 return false; 357 } 358 359 /** 360 * @param job JobStatus we are querying against. 361 * @return Whether or not the job represented by the status object is currently being run or 362 * is pending. 363 */ 364 private boolean isCurrentlyActiveLocked(JobStatus job) { 365 for (int i=0; i<mActiveServices.size(); i++) { 366 JobServiceContext serviceContext = mActiveServices.get(i); 367 final JobStatus running = serviceContext.getRunningJob(); 368 if (running != null && running.matches(job.getUid(), job.getJobId())) { 369 return true; 370 } 371 } 372 return false; 373 } 374 375 /** 376 * A job is rescheduled with exponential back-off if the client requests this from their 377 * execution logic. 378 * A caveat is for idle-mode jobs, for which the idle-mode constraint will usurp the 379 * timeliness of the reschedule. For an idle-mode job, no deadline is given. 380 * @param failureToReschedule Provided job status that we will reschedule. 381 * @return A newly instantiated JobStatus with the same constraints as the last job except 382 * with adjusted timing constraints. 383 */ 384 private JobStatus getRescheduleJobForFailure(JobStatus failureToReschedule) { 385 final long elapsedNowMillis = SystemClock.elapsedRealtime(); 386 final JobInfo job = failureToReschedule.getJob(); 387 388 final long initialBackoffMillis = job.getInitialBackoffMillis(); 389 final int backoffAttempt = failureToReschedule.getNumFailures() + 1; 390 long newEarliestRuntimeElapsed = elapsedNowMillis; 391 392 switch (job.getBackoffPolicy()) { 393 case JobInfo.BackoffPolicy.LINEAR: 394 newEarliestRuntimeElapsed += initialBackoffMillis * backoffAttempt; 395 break; 396 default: 397 if (DEBUG) { 398 Slog.v(TAG, "Unrecognised back-off policy, defaulting to exponential."); 399 } 400 case JobInfo.BackoffPolicy.EXPONENTIAL: 401 newEarliestRuntimeElapsed += 402 Math.pow(initialBackoffMillis * 0.001, backoffAttempt) * 1000; 403 break; 404 } 405 newEarliestRuntimeElapsed = 406 Math.min(newEarliestRuntimeElapsed, JobInfo.MAX_BACKOFF_DELAY_MILLIS); 407 return new JobStatus(failureToReschedule, newEarliestRuntimeElapsed, 408 JobStatus.NO_LATEST_RUNTIME, backoffAttempt); 409 } 410 411 /** 412 * Called after a periodic has executed so we can to re-add it. We take the last execution time 413 * of the job to be the time of completion (i.e. the time at which this function is called). 414 * This could be inaccurate b/c the job can run for as long as 415 * {@link com.android.server.job.JobServiceContext#EXECUTING_TIMESLICE_MILLIS}, but will lead 416 * to underscheduling at least, rather than if we had taken the last execution time to be the 417 * start of the execution. 418 * @return A new job representing the execution criteria for this instantiation of the 419 * recurring job. 420 */ 421 private JobStatus getRescheduleJobForPeriodic(JobStatus periodicToReschedule) { 422 final long elapsedNow = SystemClock.elapsedRealtime(); 423 // Compute how much of the period is remaining. 424 long runEarly = Math.max(periodicToReschedule.getLatestRunTimeElapsed() - elapsedNow, 0); 425 long newEarliestRunTimeElapsed = elapsedNow + runEarly; 426 long period = periodicToReschedule.getJob().getIntervalMillis(); 427 long newLatestRuntimeElapsed = newEarliestRunTimeElapsed + period; 428 429 if (DEBUG) { 430 Slog.v(TAG, "Rescheduling executed periodic. New execution window [" + 431 newEarliestRunTimeElapsed/1000 + ", " + newLatestRuntimeElapsed/1000 + "]s"); 432 } 433 return new JobStatus(periodicToReschedule, newEarliestRunTimeElapsed, 434 newLatestRuntimeElapsed, 0 /* backoffAttempt */); 435 } 436 437 // JobCompletedListener implementations. 438 439 /** 440 * A job just finished executing. We fetch the 441 * {@link com.android.server.job.controllers.JobStatus} from the store and depending on 442 * whether we want to reschedule we readd it to the controllers. 443 * @param jobStatus Completed job. 444 * @param needsReschedule Whether the implementing class should reschedule this job. 445 */ 446 @Override 447 public void onJobCompleted(JobStatus jobStatus, boolean needsReschedule) { 448 if (DEBUG) { 449 Slog.d(TAG, "Completed " + jobStatus + ", reschedule=" + needsReschedule); 450 } 451 if (!stopTrackingJob(jobStatus)) { 452 if (DEBUG) { 453 Slog.d(TAG, "Could not find job to remove. Was job removed while executing?"); 454 } 455 return; 456 } 457 if (needsReschedule) { 458 JobStatus rescheduled = getRescheduleJobForFailure(jobStatus); 459 startTrackingJob(rescheduled); 460 } else if (jobStatus.getJob().isPeriodic()) { 461 JobStatus rescheduledPeriodic = getRescheduleJobForPeriodic(jobStatus); 462 startTrackingJob(rescheduledPeriodic); 463 } 464 mHandler.obtainMessage(MSG_CHECK_JOB).sendToTarget(); 465 } 466 467 // StateChangedListener implementations. 468 469 /** 470 * Off-board work to our handler thread as quickly as possible, b/c this call is probably being 471 * made on the main thread. 472 * For now this takes the job and if it's ready to run it will run it. In future we might not 473 * provide the job, so that the StateChangedListener has to run through its list of jobs to 474 * see which are ready. This will further decouple the controllers from the execution logic. 475 */ 476 @Override 477 public void onControllerStateChanged() { 478 synchronized (mJobs) { 479 if (mReadyToRock) { 480 // Post a message to to run through the list of jobs and start/stop any that 481 // are eligible. 482 mHandler.obtainMessage(MSG_CHECK_JOB).sendToTarget(); 483 } 484 } 485 } 486 487 @Override 488 public void onRunJobNow(JobStatus jobStatus) { 489 mHandler.obtainMessage(MSG_JOB_EXPIRED, jobStatus).sendToTarget(); 490 } 491 492 private class JobHandler extends Handler { 493 494 public JobHandler(Looper looper) { 495 super(looper); 496 } 497 498 @Override 499 public void handleMessage(Message message) { 500 switch (message.what) { 501 case MSG_JOB_EXPIRED: 502 synchronized (mJobs) { 503 JobStatus runNow = (JobStatus) message.obj; 504 if (!mPendingJobs.contains(runNow)) { 505 mPendingJobs.add(runNow); 506 } 507 } 508 queueReadyJobsForExecutionH(); 509 break; 510 case MSG_CHECK_JOB: 511 // Check the list of jobs and run some of them if we feel inclined. 512 maybeQueueReadyJobsForExecutionH(); 513 break; 514 } 515 maybeRunPendingJobsH(); 516 // Don't remove JOB_EXPIRED in case one came along while processing the queue. 517 removeMessages(MSG_CHECK_JOB); 518 } 519 520 /** 521 * Run through list of jobs and execute all possible - at least one is expired so we do 522 * as many as we can. 523 */ 524 private void queueReadyJobsForExecutionH() { 525 synchronized (mJobs) { 526 ArraySet<JobStatus> jobs = mJobs.getJobs(); 527 for (int i=0; i<jobs.size(); i++) { 528 JobStatus job = jobs.valueAt(i); 529 if (isReadyToBeExecutedLocked(job)) { 530 mPendingJobs.add(job); 531 } else if (isReadyToBeCancelledLocked(job)) { 532 stopJobOnServiceContextLocked(job); 533 } 534 } 535 } 536 } 537 538 /** 539 * The state of at least one job has changed. Here is where we could enforce various 540 * policies on when we want to execute jobs. 541 * Right now the policy is such: 542 * If >1 of the ready jobs is idle mode we send all of them off 543 * if more than 2 network connectivity jobs are ready we send them all off. 544 * If more than 4 jobs total are ready we send them all off. 545 * TODO: It would be nice to consolidate these sort of high-level policies somewhere. 546 */ 547 private void maybeQueueReadyJobsForExecutionH() { 548 synchronized (mJobs) { 549 int idleCount = 0; 550 int backoffCount = 0; 551 int connectivityCount = 0; 552 List<JobStatus> runnableJobs = new ArrayList<JobStatus>(); 553 ArraySet<JobStatus> jobs = mJobs.getJobs(); 554 for (int i=0; i<jobs.size(); i++) { 555 JobStatus job = jobs.valueAt(i); 556 if (isReadyToBeExecutedLocked(job)) { 557 if (job.getNumFailures() > 0) { 558 backoffCount++; 559 } 560 if (job.hasIdleConstraint()) { 561 idleCount++; 562 } 563 if (job.hasConnectivityConstraint() || job.hasUnmeteredConstraint()) { 564 connectivityCount++; 565 } 566 runnableJobs.add(job); 567 } else if (isReadyToBeCancelledLocked(job)) { 568 stopJobOnServiceContextLocked(job); 569 } 570 } 571 if (backoffCount > 0 || idleCount >= MIN_IDLE_COUNT || 572 connectivityCount >= MIN_CONNECTIVITY_COUNT || 573 runnableJobs.size() >= MIN_READY_JOBS_COUNT) { 574 for (int i=0; i<runnableJobs.size(); i++) { 575 mPendingJobs.add(runnableJobs.get(i)); 576 } 577 } 578 } 579 } 580 581 /** 582 * Criteria for moving a job into the pending queue: 583 * - It's ready. 584 * - It's not pending. 585 * - It's not already running on a JSC. 586 */ 587 private boolean isReadyToBeExecutedLocked(JobStatus job) { 588 return job.isReady() && !mPendingJobs.contains(job) && !isCurrentlyActiveLocked(job); 589 } 590 591 /** 592 * Criteria for cancelling an active job: 593 * - It's not ready 594 * - It's running on a JSC. 595 */ 596 private boolean isReadyToBeCancelledLocked(JobStatus job) { 597 return !job.isReady() && isCurrentlyActiveLocked(job); 598 } 599 600 /** 601 * Reconcile jobs in the pending queue against available execution contexts. 602 * A controller can force a job into the pending queue even if it's already running, but 603 * here is where we decide whether to actually execute it. 604 */ 605 private void maybeRunPendingJobsH() { 606 synchronized (mJobs) { 607 Iterator<JobStatus> it = mPendingJobs.iterator(); 608 while (it.hasNext()) { 609 JobStatus nextPending = it.next(); 610 JobServiceContext availableContext = null; 611 for (int i=0; i<mActiveServices.size(); i++) { 612 JobServiceContext jsc = mActiveServices.get(i); 613 final JobStatus running = jsc.getRunningJob(); 614 if (running != null && running.matches(nextPending.getUid(), 615 nextPending.getJobId())) { 616 // Already running this job for this uId, skip. 617 availableContext = null; 618 break; 619 } 620 if (jsc.isAvailable()) { 621 availableContext = jsc; 622 } 623 } 624 if (availableContext != null) { 625 if (!availableContext.executeRunnableJob(nextPending)) { 626 if (DEBUG) { 627 Slog.d(TAG, "Error executing " + nextPending); 628 } 629 mJobs.remove(nextPending); 630 } 631 it.remove(); 632 } 633 } 634 } 635 } 636 } 637 638 /** 639 * Binder stub trampoline implementation 640 */ 641 final class JobSchedulerStub extends IJobScheduler.Stub { 642 /** Cache determination of whether a given app can persist jobs 643 * key is uid of the calling app; value is undetermined/true/false 644 */ 645 private final SparseArray<Boolean> mPersistCache = new SparseArray<Boolean>(); 646 647 // Enforce that only the app itself (or shared uid participant) can schedule a 648 // job that runs one of the app's services, as well as verifying that the 649 // named service properly requires the BIND_JOB_SERVICE permission 650 private void enforceValidJobRequest(int uid, JobInfo job) { 651 final IPackageManager pm = AppGlobals.getPackageManager(); 652 final ComponentName service = job.getService(); 653 try { 654 ServiceInfo si = pm.getServiceInfo(service, 0, UserHandle.getUserId(uid)); 655 if (si == null) { 656 throw new IllegalArgumentException("No such service " + service); 657 } 658 if (si.applicationInfo.uid != uid) { 659 throw new IllegalArgumentException("uid " + uid + 660 " cannot schedule job in " + service.getPackageName()); 661 } 662 if (!JobService.PERMISSION_BIND.equals(si.permission)) { 663 throw new IllegalArgumentException("Scheduled service " + service 664 + " does not require android.permission.BIND_JOB_SERVICE permission"); 665 } 666 } catch (RemoteException e) { 667 // Can't happen; the Package Manager is in this same process 668 } 669 } 670 671 private boolean canPersistJobs(int pid, int uid) { 672 // If we get this far we're good to go; all we need to do now is check 673 // whether the app is allowed to persist its scheduled work. 674 final boolean canPersist; 675 synchronized (mPersistCache) { 676 Boolean cached = mPersistCache.get(uid); 677 if (cached != null) { 678 canPersist = cached.booleanValue(); 679 } else { 680 // Persisting jobs is tantamount to running at boot, so we permit 681 // it when the app has declared that it uses the RECEIVE_BOOT_COMPLETED 682 // permission 683 int result = getContext().checkPermission( 684 android.Manifest.permission.RECEIVE_BOOT_COMPLETED, pid, uid); 685 canPersist = (result == PackageManager.PERMISSION_GRANTED); 686 mPersistCache.put(uid, canPersist); 687 } 688 } 689 return canPersist; 690 } 691 692 // IJobScheduler implementation 693 @Override 694 public int schedule(JobInfo job) throws RemoteException { 695 if (DEBUG) { 696 Slog.d(TAG, "Scheduling job: " + job.toString()); 697 } 698 final int pid = Binder.getCallingPid(); 699 final int uid = Binder.getCallingUid(); 700 701 enforceValidJobRequest(uid, job); 702 if (job.isPersisted()) { 703 if (!canPersistJobs(pid, uid)) { 704 throw new IllegalArgumentException("Error: requested job be persisted without" 705 + " holding RECEIVE_BOOT_COMPLETED permission."); 706 } 707 } 708 709 long ident = Binder.clearCallingIdentity(); 710 try { 711 return JobSchedulerService.this.schedule(job, uid); 712 } finally { 713 Binder.restoreCallingIdentity(ident); 714 } 715 } 716 717 @Override 718 public List<JobInfo> getAllPendingJobs() throws RemoteException { 719 final int uid = Binder.getCallingUid(); 720 721 long ident = Binder.clearCallingIdentity(); 722 try { 723 return JobSchedulerService.this.getPendingJobs(uid); 724 } finally { 725 Binder.restoreCallingIdentity(ident); 726 } 727 } 728 729 @Override 730 public void cancelAll() throws RemoteException { 731 final int uid = Binder.getCallingUid(); 732 733 long ident = Binder.clearCallingIdentity(); 734 try { 735 JobSchedulerService.this.cancelJobsForUid(uid); 736 } finally { 737 Binder.restoreCallingIdentity(ident); 738 } 739 } 740 741 @Override 742 public void cancel(int jobId) throws RemoteException { 743 final int uid = Binder.getCallingUid(); 744 745 long ident = Binder.clearCallingIdentity(); 746 try { 747 JobSchedulerService.this.cancelJob(uid, jobId); 748 } finally { 749 Binder.restoreCallingIdentity(ident); 750 } 751 } 752 753 /** 754 * "dumpsys" infrastructure 755 */ 756 @Override 757 public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 758 getContext().enforceCallingOrSelfPermission(android.Manifest.permission.DUMP, TAG); 759 760 long identityToken = Binder.clearCallingIdentity(); 761 try { 762 JobSchedulerService.this.dumpInternal(pw); 763 } finally { 764 Binder.restoreCallingIdentity(identityToken); 765 } 766 } 767 }; 768 769 void dumpInternal(PrintWriter pw) { 770 synchronized (mJobs) { 771 pw.println("Registered jobs:"); 772 if (mJobs.size() > 0) { 773 ArraySet<JobStatus> jobs = mJobs.getJobs(); 774 for (int i=0; i<jobs.size(); i++) { 775 JobStatus job = jobs.valueAt(i); 776 job.dump(pw, " "); 777 } 778 } else { 779 pw.println(); 780 pw.println("No jobs scheduled."); 781 } 782 for (int i=0; i<mControllers.size(); i++) { 783 pw.println(); 784 mControllers.get(i).dumpControllerState(pw); 785 } 786 pw.println(); 787 pw.println("Pending"); 788 for (int i=0; i<mPendingJobs.size(); i++) { 789 pw.println(mPendingJobs.get(i).hashCode()); 790 } 791 pw.println(); 792 pw.println("Active jobs:"); 793 for (int i=0; i<mActiveServices.size(); i++) { 794 JobServiceContext jsc = mActiveServices.get(i); 795 if (jsc.isAvailable()) { 796 continue; 797 } else { 798 pw.println(jsc.getRunningJob().hashCode() + " for: " + 799 (SystemClock.elapsedRealtime() 800 - jsc.getExecutionStartTimeElapsed())/1000 + "s " + 801 "timeout: " + jsc.getTimeoutElapsed()); 802 } 803 } 804 pw.println(); 805 pw.print("mReadyToRock="); pw.println(mReadyToRock); 806 } 807 pw.println(); 808 } 809} 810