Merge "Support restricted mode in SensorService."

include/gui/ISensorServer.h

@@ -30,6 +30,7 @@ namespace android {
 
 class Sensor;
 class ISensorEventConnection;
+class String8;
 
 class ISensorServer : public IInterface
 {
@@ -37,7 +38,7 @@ public:
     DECLARE_META_INTERFACE(SensorServer);
 
     virtual Vector<Sensor> getSensorList() = 0;
-    virtual sp<ISensorEventConnection> createSensorEventConnection() = 0;
+    virtual sp<ISensorEventConnection> createSensorEventConnection(const String8& packageName) = 0;
 };
 
 // ----------------------------------------------------------------------------

include/gui/SensorManager.h

@@ -40,7 +40,7 @@ namespace android {
 class ISensorServer;
 class Sensor;
 class SensorEventQueue;
-
+class String8;
 // ----------------------------------------------------------------------------
 
 class SensorManager :
@@ -53,7 +53,7 @@ public:
 
     ssize_t getSensorList(Sensor const* const** list) const;
     Sensor const* getDefaultSensor(int type);
-    sp<SensorEventQueue> createEventQueue();
+    sp<SensorEventQueue> createEventQueue(String8 packageName = String8(""));
 
 private:
     // DeathRecipient interface

libs/gui/ISensorServer.cpp

@@ -63,10 +63,11 @@ public:
         return v;
     }
 
-    virtual sp<ISensorEventConnection> createSensorEventConnection()
+    virtual sp<ISensorEventConnection> createSensorEventConnection(const String8& packageName)
     {
         Parcel data, reply;
         data.writeInterfaceToken(ISensorServer::getInterfaceDescriptor());
+        data.writeString8(packageName);
         remote()->transact(CREATE_SENSOR_EVENT_CONNECTION, data, &reply);
         return interface_cast<ISensorEventConnection>(reply.readStrongBinder());
     }
@@ -96,7 +97,8 @@ status_t BnSensorServer::onTransact(
         }
         case CREATE_SENSOR_EVENT_CONNECTION: {
             CHECK_INTERFACE(ISensorServer, data, reply);
-            sp<ISensorEventConnection> connection(createSensorEventConnection());
+            String8 packageName = data.readString8();
+            sp<ISensorEventConnection> connection(createSensorEventConnection(packageName));
             reply->writeStrongBinder(IInterface::asBinder(connection));
             return NO_ERROR;
         }

libs/gui/SensorManager.cpp

@@ -139,14 +139,14 @@ Sensor const* SensorManager::getDefaultSensor(int type)
     return NULL;
 }
 
-sp<SensorEventQueue> SensorManager::createEventQueue()
+sp<SensorEventQueue> SensorManager::createEventQueue(String8 packageName)
 {
     sp<SensorEventQueue> queue;
 
     Mutex::Autolock _l(mLock);
     while (assertStateLocked() == NO_ERROR) {
         sp<ISensorEventConnection> connection =
-                mSensorServer->createSensorEventConnection();
+                mSensorServer->createSensorEventConnection(packageName);
         if (connection == NULL) {
             // SensorService just died.
             ALOGE("createEventQueue: connection is NULL. SensorService died.");

services/sensorservice/SensorDevice.cpp

@@ -85,6 +85,7 @@ void SensorDevice::dump(String8& result)
     Mutex::Autolock _l(mLock);
     for (size_t i=0 ; i<size_t(count) ; i++) {
         const Info& info = mActivationCount.valueFor(list[i].handle);
+        if (info.batchParams.isEmpty()) continue;
         result.appendFormat("handle=0x%08x, active-count=%zu, batch_period(ms)={ ", list[i].handle,
                             info.batchParams.size());
         for (size_t j = 0; j < info.batchParams.size(); j++) {
@@ -147,8 +148,12 @@ status_t SensorDevice::activate(void* ident, int handle, int enabled)
     if (enabled) {
         ALOGD_IF(DEBUG_CONNECTIONS, "enable index=%zd", info.batchParams.indexOfKey(ident));
 
+        if (isClientDisabledLocked(ident)) {
+            return INVALID_OPERATION;
+        }
+
         if (info.batchParams.indexOfKey(ident) >= 0) {
-          if (info.batchParams.size() == 1) {
+          if (info.numActiveClients() == 1) {
               // This is the first connection, we need to activate the underlying h/w sensor.
               actuateHardware = true;
           }
@@ -160,7 +165,7 @@ status_t SensorDevice::activate(void* ident, int handle, int enabled)
         ALOGD_IF(DEBUG_CONNECTIONS, "disable index=%zd", info.batchParams.indexOfKey(ident));
 
         if (info.removeBatchParamsForIdent(ident) >= 0) {
-            if (info.batchParams.size() == 0) {
+            if (info.numActiveClients() == 0) {
                 // This is the last connection, we need to de-activate the underlying h/w sensor.
                 actuateHardware = true;
             } else {
@@ -181,10 +186,15 @@ status_t SensorDevice::activate(void* ident, int handle, int enabled)
         } else {
             // sensor wasn't enabled for this ident
         }
+
+        if (isClientDisabledLocked(ident)) {
+            return NO_ERROR;
+        }
     }
 
     if (actuateHardware) {
-        ALOGD_IF(DEBUG_CONNECTIONS, "\t>>> actuating h/w activate handle=%d enabled=%d", handle, enabled);
+        ALOGD_IF(DEBUG_CONNECTIONS, "\t>>> actuating h/w activate handle=%d enabled=%d", handle,
+                 enabled);
         err = mSensorDevice->activate(
                 reinterpret_cast<struct sensors_poll_device_t *> (mSensorDevice), handle, enabled);
         ALOGE_IF(err, "Error %s sensor %d (%s)", enabled ? "activating" : "disabling", handle,
@@ -197,7 +207,7 @@ status_t SensorDevice::activate(void* ident, int handle, int enabled)
     }
 
     // On older devices which do not support batch, call setDelay().
-    if (getHalDeviceVersion() < SENSORS_DEVICE_API_VERSION_1_1 && info.batchParams.size() > 0) {
+    if (getHalDeviceVersion() < SENSORS_DEVICE_API_VERSION_1_1 && info.numActiveClients() > 0) {
         ALOGD_IF(DEBUG_CONNECTIONS, "\t>>> actuating h/w setDelay %d %" PRId64, handle,
                  info.bestBatchParams.batchDelay);
         mSensorDevice->setDelay(
@@ -279,6 +289,7 @@ status_t SensorDevice::setDelay(void* ident, int handle, int64_t samplingPeriodN
         samplingPeriodNs = MINIMUM_EVENTS_PERIOD;
     }
     Mutex::Autolock _l(mLock);
+    if (isClientDisabledLocked(ident)) return INVALID_OPERATION;
     Info& info( mActivationCount.editValueFor(handle) );
     // If the underlying sensor is NOT in continuous mode, setDelay() should return an error.
     // Calling setDelay() in batch mode is an invalid operation.
@@ -298,7 +309,6 @@ status_t SensorDevice::setDelay(void* ident, int handle, int64_t samplingPeriodN
 
 int SensorDevice::getHalDeviceVersion() const {
     if (!mSensorDevice) return -1;
-
     return mSensorDevice->common.version;
 }
 
@@ -306,12 +316,89 @@ status_t SensorDevice::flush(void* ident, int handle) {
     if (getHalDeviceVersion() < SENSORS_DEVICE_API_VERSION_1_1) {
         return INVALID_OPERATION;
     }
+    if (isClientDisabled(ident)) return INVALID_OPERATION;
     ALOGD_IF(DEBUG_CONNECTIONS, "\t>>> actuating h/w flush %d", handle);
     return mSensorDevice->flush(mSensorDevice, handle);
 }
 
+bool SensorDevice::isClientDisabled(void* ident) {
+    Mutex::Autolock _l(mLock);
+    return isClientDisabledLocked(ident);
+}
+
+bool SensorDevice::isClientDisabledLocked(void* ident) {
+    return mDisabledClients.indexOf(ident) >= 0;
+}
+
+void SensorDevice::enableAllSensors() {
+    Mutex::Autolock _l(mLock);
+    mDisabledClients.clear();
+    const int halVersion = getHalDeviceVersion();
+    for (size_t i = 0; i< mActivationCount.size(); ++i) {
+        Info& info = mActivationCount.editValueAt(i);
+        if (info.batchParams.isEmpty()) continue;
+        info.selectBatchParams();
+        const int sensor_handle = mActivationCount.keyAt(i);
+        ALOGD_IF(DEBUG_CONNECTIONS, "\t>> reenable actuating h/w sensor enable handle=%d ",
+                   sensor_handle);
+        status_t err(NO_ERROR);
+        if (halVersion > SENSORS_DEVICE_API_VERSION_1_0) {
+            err = mSensorDevice->batch(mSensorDevice, sensor_handle,
+                 info.bestBatchParams.flags, info.bestBatchParams.batchDelay,
+                 info.bestBatchParams.batchTimeout);
+            ALOGE_IF(err, "Error calling batch on sensor %d (%s)", sensor_handle, strerror(-err));
+        }
+
+        if (err == NO_ERROR) {
+            err = mSensorDevice->activate(
+                    reinterpret_cast<struct sensors_poll_device_t *>(mSensorDevice),
+                    sensor_handle, 1);
+            ALOGE_IF(err, "Error activating sensor %d (%s)", sensor_handle, strerror(-err));
+        }
+
+        if (halVersion <= SENSORS_DEVICE_API_VERSION_1_0) {
+             err = mSensorDevice->setDelay(
+                    reinterpret_cast<struct sensors_poll_device_t *>(mSensorDevice),
+                    sensor_handle, info.bestBatchParams.batchDelay);
+             ALOGE_IF(err, "Error calling setDelay sensor %d (%s)", sensor_handle, strerror(-err));
+        }
+    }
+}
+
+void SensorDevice::disableAllSensors() {
+    Mutex::Autolock _l(mLock);
+    for (size_t i = 0; i< mActivationCount.size(); ++i) {
+        const Info& info = mActivationCount.valueAt(i);
+        // Check if this sensor has been activated previously and disable it.
+        if (info.batchParams.size() > 0) {
+           const int sensor_handle = mActivationCount.keyAt(i);
+           ALOGD_IF(DEBUG_CONNECTIONS, "\t>> actuating h/w sensor disable handle=%d ",
+                   sensor_handle);
+           mSensorDevice->activate(
+                   reinterpret_cast<struct sensors_poll_device_t *> (mSensorDevice),
+                   sensor_handle, 0);
+           // Add all the connections that were registered for this sensor to the disabled
+           // clients list.
+           for (int j = 0; j < info.batchParams.size(); ++j) {
+               mDisabledClients.add(info.batchParams.keyAt(j));
+           }
+        }
+    }
+}
+
 // ---------------------------------------------------------------------------
 
+int SensorDevice::Info::numActiveClients() {
+    SensorDevice& device(SensorDevice::getInstance());
+    int num = 0;
+    for (size_t i = 0; i < batchParams.size(); ++i) {
+        if (!device.isClientDisabledLocked(batchParams.keyAt(i))) {
+            ++num;
+        }
+    }
+    return num;
+}
+
 status_t SensorDevice::Info::setBatchParamsForIdent(void* ident, int flags,
                                                     int64_t samplingPeriodNs,
                                                     int64_t maxBatchReportLatencyNs) {
@@ -329,19 +416,16 @@ status_t SensorDevice::Info::setBatchParamsForIdent(void* ident, int flags,
 }
 
 void SensorDevice::Info::selectBatchParams() {
-    BatchParams bestParams(-1, -1, -1);
+    BatchParams bestParams(0, -1, -1);
+    SensorDevice& device(SensorDevice::getInstance());
 
-    if (batchParams.size() > 0) {
+    for (size_t i = 0; i < batchParams.size(); ++i) {
-        BatchParams params = batchParams.valueAt(0);
+        if (device.isClientDisabledLocked(batchParams.keyAt(i))) continue;
-        bestParams = params;
-    }
-
-    for (size_t i = 1; i < batchParams.size(); ++i) {
         BatchParams params = batchParams.valueAt(i);
-        if (params.batchDelay < bestParams.batchDelay) {
+        if (bestParams.batchDelay == -1 || params.batchDelay < bestParams.batchDelay) {
             bestParams.batchDelay = params.batchDelay;
         }
-        if (params.batchTimeout < bestParams.batchTimeout) {
+        if (bestParams.batchTimeout == -1 || params.batchTimeout < bestParams.batchTimeout) {
             bestParams.batchTimeout = params.batchTimeout;
         }
     }

services/sensorservice/SensorDevice.h

@@ -42,6 +42,7 @@ class SensorDevice : public Singleton<SensorDevice> {
     // Struct to store all the parameters(samplingPeriod, maxBatchReportLatency and flags) from
     // batch call. For continous mode clients, maxBatchReportLatency is set to zero.
     struct BatchParams {
+      // TODO: Get rid of flags parameter everywhere.
       int flags;
       nsecs_t batchDelay, batchTimeout;
       BatchParams() : flags(0), batchDelay(0), batchTimeout(0) {}
@@ -65,7 +66,7 @@ class SensorDevice : public Singleton<SensorDevice> {
         // requested by the client.
         KeyedVector<void*, BatchParams> batchParams;
 
-        Info() : bestBatchParams(-1, -1, -1) {}
+        Info() : bestBatchParams(0, -1, -1) {}
         // Sets batch parameters for this ident. Returns error if this ident is not already present
         // in the KeyedVector above.
         status_t setBatchParamsForIdent(void* ident, int flags, int64_t samplingPeriodNs,
@@ -75,10 +76,17 @@ class SensorDevice : public Singleton<SensorDevice> {
         // Removes batchParams for an ident and re-computes bestBatchParams. Returns the index of
         // the removed ident. If index >=0, ident is present and successfully removed.
         ssize_t removeBatchParamsForIdent(void* ident);
+
+        int numActiveClients();
     };
     DefaultKeyedVector<int, Info> mActivationCount;
 
+    // Use this vector to determine which client is activated or deactivated.
+    SortedVector<void *> mDisabledClients;
     SensorDevice();
+
+    bool isClientDisabled(void* ident);
+    bool isClientDisabledLocked(void* ident);
 public:
     ssize_t getSensorList(sensor_t const** list);
     status_t initCheck() const;
@@ -90,6 +98,8 @@ public:
     // Call batch with timeout zero instead of calling setDelay() for newer devices.
     status_t setDelay(void* ident, int handle, int64_t ns);
     status_t flush(void* ident, int handle);
+    void disableAllSensors();
+    void enableAllSensors();
     void autoDisable(void *ident, int handle);
     void dump(String8& result);
 };

services/sensorservice/SensorService.cpp

@@ -190,6 +190,7 @@ void SensorService::onFirstRef()
             mSensorEventBuffer = new sensors_event_t[minBufferSize];
             mSensorEventScratch = new sensors_event_t[minBufferSize];
             mMapFlushEventsToConnections = new SensorEventConnection const * [minBufferSize];
+            mMode = NORMAL;
 
             mAckReceiver = new SensorEventAckReceiver(this);
             mAckReceiver->run("SensorEventAckReceiver", PRIORITY_URGENT_DISPLAY);
@@ -230,7 +231,7 @@ SensorService::~SensorService()
 
 static const String16 sDump("android.permission.DUMP");
 
-status_t SensorService::dump(int fd, const Vector<String16>& /*args*/)
+status_t SensorService::dump(int fd, const Vector<String16>& args)
 {
     String8 result;
     if (!PermissionCache::checkCallingPermission(sDump)) {
@@ -238,6 +239,26 @@ status_t SensorService::dump(int fd, const Vector<String16>& /*args*/)
                 "can't dump SensorService from pid=%d, uid=%d\n",
                 IPCThreadState::self()->getCallingPid(),
                 IPCThreadState::self()->getCallingUid());
+    } else if (args.size() > 0) {
+        if (args.size() > 1) {
+           return INVALID_OPERATION;
+        }
+        Mutex::Autolock _l(mLock);
+        SensorDevice& dev(SensorDevice::getInstance());
+        if (args[0] == String16("restrict") && mMode == NORMAL) {
+            mMode = RESTRICTED;
+            dev.disableAllSensors();
+            // Clear all pending flush connections for all active sensors. If one of the active
+            // connections has called flush() and the underlying sensor has been disabled before a
+            // flush complete event is returned, we need to remove the connection from this queue.
+            for (size_t i=0 ; i< mActiveSensors.size(); ++i) {
+                mActiveSensors.valueAt(i)->clearAllPendingFlushConnections();
+            }
+        } else if (args[0] == String16("enable") && mMode == RESTRICTED) {
+            mMode = NORMAL;
+            dev.enableAllSensors();
+        }
+        return status_t(NO_ERROR);
     } else {
         Mutex::Autolock _l(mLock);
         result.append("Sensor List:\n");
@@ -341,6 +362,17 @@ status_t SensorService::dump(int fd, const Vector<String16>& /*args*/)
         result.appendFormat("Socket Buffer size = %d events\n",
                             mSocketBufferSize/sizeof(sensors_event_t));
         result.appendFormat("WakeLock Status: %s \n", mWakeLockAcquired ? "acquired" : "not held");
+        result.appendFormat("Mode :");
+        switch(mMode) {
+           case NORMAL:
+               result.appendFormat(" NORMAL\n");
+               break;
+           case RESTRICTED:
+               result.appendFormat(" RESTRICTED\n");
+               break;
+           case DATA_INJECTION:
+               result.appendFormat(" DATA_INJECTION\n");
+        }
         result.appendFormat("%zd active connections\n", mActiveConnections.size());
 
         for (size_t i=0 ; i < mActiveConnections.size() ; i++) {
@@ -554,7 +586,6 @@ void SensorService::setWakeLockAcquiredLocked(bool acquire) {
     }
 }
 
-
 bool SensorService::isWakeLockAcquired() {
     Mutex::Autolock _l(mLock);
     return mWakeLockAcquired;
@@ -630,7 +661,6 @@ bool SensorService::isWakeUpSensorEvent(const sensors_event_t& event) const {
     return sensor != NULL && sensor->getSensor().isWakeUpSensor();
 }
 
-
 SensorService::SensorRecord * SensorService::getSensorRecord(int handle) {
      return mActiveSensors.valueFor(handle);
 }
@@ -655,10 +685,10 @@ Vector<Sensor> SensorService::getSensorList()
     return accessibleSensorList;
 }
 
-sp<ISensorEventConnection> SensorService::createSensorEventConnection()
+sp<ISensorEventConnection> SensorService::createSensorEventConnection(const String8& packageName)
 {
     uid_t uid = IPCThreadState::self()->getCallingUid();
-    sp<SensorEventConnection> result(new SensorEventConnection(this, uid));
+    sp<SensorEventConnection> result(new SensorEventConnection(this, uid, packageName));
     return result;
 }
 
@@ -708,7 +738,7 @@ Sensor SensorService::getSensorFromHandle(int handle) const {
 }
 
 status_t SensorService::enable(const sp<SensorEventConnection>& connection,
-        int handle, nsecs_t samplingPeriodNs,  nsecs_t maxBatchReportLatencyNs, int reservedFlags)
+        int handle, nsecs_t samplingPeriodNs, nsecs_t maxBatchReportLatencyNs, int reservedFlags)
 {
     if (mInitCheck != NO_ERROR)
         return mInitCheck;
@@ -723,6 +753,10 @@ status_t SensorService::enable(const sp<SensorEventConnection>& connection,
     }
 
     Mutex::Autolock _l(mLock);
+    if (mMode == RESTRICTED && !isWhiteListedPackage(connection->getPackageName())) {
+        return INVALID_OPERATION;
+    }
+
     SensorRecord* rec = mActiveSensors.valueFor(handle);
     if (rec == 0) {
         rec = new SensorRecord(connection);
@@ -773,7 +807,7 @@ status_t SensorService::enable(const sp<SensorEventConnection>& connection,
                                 "rate=%" PRId64 " timeout== %" PRId64"",
              handle, reservedFlags, samplingPeriodNs, maxBatchReportLatencyNs);
 
-    status_t err = sensor->batch(connection.get(), handle, reservedFlags, samplingPeriodNs,
+    status_t err = sensor->batch(connection.get(), handle, 0, samplingPeriodNs,
                                  maxBatchReportLatencyNs);
 
     // Call flush() before calling activate() on the sensor. Wait for a first flush complete
@@ -969,6 +1003,11 @@ void SensorService::populateActiveConnections(
     }
 }
 
+bool SensorService::isWhiteListedPackage(const String8& packageName) {
+    // TODO: Come up with a list of packages.
+    return (packageName.find(".cts.") != -1);
+}
+
 // ---------------------------------------------------------------------------
 SensorService::SensorRecord::SensorRecord(
         const sp<SensorEventConnection>& connection)
@@ -1025,12 +1064,16 @@ SensorService::SensorRecord::getFirstPendingFlushConnection() {
     return NULL;
 }
 
+void SensorService::SensorRecord::clearAllPendingFlushConnections() {
+    mPendingFlushConnections.clear();
+}
+
 // ---------------------------------------------------------------------------
 
 SensorService::SensorEventConnection::SensorEventConnection(
-        const sp<SensorService>& service, uid_t uid)
+        const sp<SensorService>& service, uid_t uid, String8 packageName)
     : mService(service), mUid(uid), mWakeLockRefCount(0), mHasLooperCallbacks(false),
-      mDead(false), mEventCache(NULL), mCacheSize(0), mMaxCacheSize(0) {
+      mDead(false), mEventCache(NULL), mCacheSize(0), mMaxCacheSize(0), mPackageName(packageName) {
     mChannel = new BitTube(mService->mSocketBufferSize);
 #if DEBUG_CONNECTIONS
     mEventsReceived = mEventsSentFromCache = mEventsSent = 0;
@@ -1062,8 +1105,8 @@ void SensorService::SensorEventConnection::resetWakeLockRefCount() {
 
 void SensorService::SensorEventConnection::dump(String8& result) {
     Mutex::Autolock _l(mConnectionLock);
-    result.appendFormat("\t WakeLockRefCount %d | uid %d | cache size %d | max cache size %d\n",
+    result.appendFormat("\t%s | WakeLockRefCount %d | uid %d | cache size %d | max cache size %d\n",
-            mWakeLockRefCount, mUid, mCacheSize, mMaxCacheSize);
+            mPackageName.string(), mWakeLockRefCount, mUid, mCacheSize, mMaxCacheSize);
     for (size_t i = 0; i < mSensorInfo.size(); ++i) {
         const FlushInfo& flushInfo = mSensorInfo.valueAt(i);
         result.appendFormat("\t %s 0x%08x | status: %s | pending flush events %d \n",
@@ -1126,6 +1169,10 @@ bool SensorService::SensorEventConnection::hasOneShotSensors() const {
     return false;
 }
 
+String8 SensorService::SensorEventConnection::getPackageName() const {
+    return mPackageName;
+}
+
 void SensorService::SensorEventConnection::setFirstFlushPending(int32_t handle,
                                 bool value) {
     Mutex::Autolock _l(mConnectionLock);

services/sensorservice/SensorService.h

@@ -27,6 +27,7 @@
 #include <utils/AndroidThreads.h>
 #include <utils/RefBase.h>
 #include <utils/Looper.h>
+#include <utils/String8.h>
 
 #include <binder/BinderService.h>
 
@@ -65,6 +66,27 @@ class SensorService :
 {
     friend class BinderService<SensorService>;
 
+    enum Mode {
+       // The regular operating mode where any application can register/unregister/call flush on
+       // sensors.
+       NORMAL = 0,
+       // This mode is used only for testing sensors. Each sensor can be tested in isolation with
+       // the required sampling_rate and maxReportLatency parameters without having to think about
+       // the data rates requested by other applications. End user devices are always expected to be
+       // in NORMAL mode. When this mode is first activated, all active sensors from all connections
+       // are disabled. Calling flush() will return an error. In this mode, only the requests from
+       // selected apps whose package names are whitelisted are allowed (typically CTS apps).  Only
+       // these apps can register/unregister/call flush() on sensors.  If SensorService switches to
+       // NORMAL mode again, all sensors that were previously registered to are activated with the
+       // corresponding paramaters if the application hasn't unregistered for sensors in the mean
+       // time.
+       // NOTE: Non whitelisted app whose sensors were previously deactivated may still receive
+       // events if a whitelisted app requests data from the same sensor.
+       RESTRICTED,
+       // TODO: This mode hasn't been implemented yet.
+       DATA_INJECTION
+    };
+
     static const char* WAKE_LOCK_NAME;
 
     static char const* getServiceName() ANDROID_API { return "sensorservice"; }
@@ -78,7 +100,7 @@ class SensorService :
 
     // ISensorServer interface
     virtual Vector<Sensor> getSensorList();
-    virtual sp<ISensorEventConnection> createSensorEventConnection();
+    virtual sp<ISensorEventConnection> createSensorEventConnection(const String8& packageName);
     virtual status_t dump(int fd, const Vector<String16>& args);
 
     class SensorEventConnection : public BnSensorEventConnection, public LooperCallback {
@@ -133,7 +155,6 @@ class SensorService :
         // connection FD may be added to the Looper. The flags to set are determined by the internal
         // state of the connection. FDs are added to the looper when wake-up sensors are registered
         // (to poll for acknowledgements) and when write fails on the socket when there are too many
-        // events (to poll when the FD is available for writing). FDs are removed when there is an
         // error and the other end hangs up or when this client unregisters for this connection.
         void updateLooperRegistration(const sp<Looper>& looper);
         void updateLooperRegistrationLocked(const sp<Looper>& looper);
@@ -169,6 +190,7 @@ class SensorService :
         KeyedVector<int, FlushInfo> mSensorInfo;
         sensors_event_t *mEventCache;
         int mCacheSize, mMaxCacheSize;
+        String8 mPackageName;
 
 #if DEBUG_CONNECTIONS
         int mEventsReceived, mEventsSent, mEventsSentFromCache;
@@ -176,7 +198,7 @@ class SensorService :
 #endif
 
     public:
-        SensorEventConnection(const sp<SensorService>& service, uid_t uid);
+        SensorEventConnection(const sp<SensorService>& service, uid_t uid, String8 packageName);
 
         status_t sendEvents(sensors_event_t const* buffer, size_t count,
                 sensors_event_t* scratch,
@@ -190,6 +212,7 @@ class SensorService :
         void dump(String8& result);
         bool needsWakeLock();
         void resetWakeLockRefCount();
+        String8 getPackageName() const;
 
         uid_t getUid() const { return mUid; }
     };
@@ -208,6 +231,7 @@ class SensorService :
         void addPendingFlushConnection(const sp<SensorEventConnection>& connection);
         void removeFirstPendingFlushConnection();
         SensorEventConnection * getFirstPendingFlushConnection();
+        void clearAllPendingFlushConnections();
     };
 
     class SensorEventAckReceiver : public Thread {
@@ -261,6 +285,11 @@ class SensorService :
     // to the output vector.
     void populateActiveConnections(SortedVector< sp<SensorEventConnection> >* activeConnections);
 
+    // If SensorService is operating in RESTRICTED mode, only select whitelisted packages are
+    // allowed to register for or call flush on sensors. Typically only cts test packages are
+    // allowed.
+    bool isWhiteListedPackage(const String8& packageName);
+
     // constants
     Vector<Sensor> mSensorList;
     Vector<Sensor> mUserSensorListDebug;
@@ -282,6 +311,7 @@ class SensorService :
     bool mWakeLockAcquired;
     sensors_event_t *mSensorEventBuffer, *mSensorEventScratch;
     SensorEventConnection const **mMapFlushEventsToConnections;
+    Mode mMode;
 
     // The size of this vector is constant, only the items are mutable
     KeyedVector<int32_t, sensors_event_t> mLastEventSeen;