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Commit 736ef1e9 authored by Jeff Sharkey's avatar Jeff Sharkey Committed by Android (Google) Code Review
Browse files

Merge "Better API for low disk space warnings."

parents efd8b105 be72215c

core/java/android/app/ContextImpl.java

+2 −1
Original line number Diff line number Diff line
@@ -460,7 +460,8 @@ class ContextImpl extends Context { 
        registerService(STORAGE_SERVICE, new ServiceFetcher() {

                public Object createService(ContextImpl ctx) {

                    try {

                        return new StorageManager(ctx.mMainThread.getHandler().getLooper());

                        return new StorageManager(

                                ctx.getContentResolver(), ctx.mMainThread.getHandler().getLooper());

                    } catch (RemoteException rex) {

                        Log.e(TAG, "Failed to create StorageManager", rex);

                        return null;

core/java/android/os/storage/StorageManager.java

+44 −9
Original line number Diff line number Diff line
@@ -16,7 +16,9 @@ 


package android.os.storage;



import android.app.NotificationManager;

import static android.net.TrafficStats.MB_IN_BYTES;



import android.content.ContentResolver;

import android.content.Context;

import android.os.Environment;

import android.os.Handler;
@@ -25,6 +27,7 @@ import android.os.Message; 
import android.os.Parcelable;

import android.os.RemoteException;

import android.os.ServiceManager;

import android.provider.Settings;

import android.util.Log;

import android.util.SparseArray;
@@ -54,20 +57,20 @@ import java.util.concurrent.atomic.AtomicInteger; 
 * {@link android.content.Context#getSystemService(java.lang.String)} with an

 * argument of {@link android.content.Context#STORAGE_SERVICE}.

 */



public class StorageManager

{

public class StorageManager {

    private static final String TAG = "StorageManager";



    private final ContentResolver mResolver;



    /*

     * Our internal MountService binder reference

     */

    final private IMountService mMountService;

    private final IMountService mMountService;



    /*

     * The looper target for callbacks

     */

    Looper mTgtLooper;

    private final Looper mTgtLooper;



    /*

     * Target listener for binder callbacks
@@ -308,16 +311,16 @@ public class StorageManager 
     *

     * @hide

     */

    public StorageManager(Looper tgtLooper) throws RemoteException {

    public StorageManager(ContentResolver resolver, Looper tgtLooper) throws RemoteException {

        mResolver = resolver;

        mTgtLooper = tgtLooper;

        mMountService = IMountService.Stub.asInterface(ServiceManager.getService("mount"));

        if (mMountService == null) {

            Log.e(TAG, "Unable to connect to mount service! - is it running yet?");

            return;

        }

        mTgtLooper = tgtLooper;

    }





    /**

     * Registers a {@link android.os.storage.StorageEventListener StorageEventListener}.

     *
@@ -610,4 +613,36 @@ public class StorageManager 
        Log.w(TAG, "No primary storage defined");

        return null;

    }



    private static final int DEFAULT_THRESHOLD_PERCENTAGE = 10;

    private static final long DEFAULT_THRESHOLD_MAX_BYTES = 500 * MB_IN_BYTES;

    private static final long DEFAULT_FULL_THRESHOLD_BYTES = MB_IN_BYTES;



    /**

     * Return the number of available bytes at which the given path is

     * considered running low on storage.

     *

     * @hide

     */

    public long getStorageLowBytes(File path) {

        final long lowPercent = Settings.Global.getInt(mResolver,

                Settings.Global.SYS_STORAGE_THRESHOLD_PERCENTAGE, DEFAULT_THRESHOLD_PERCENTAGE);

        final long lowBytes = (path.getTotalSpace() * lowPercent) / 100;



        final long maxLowBytes = Settings.Global.getLong(mResolver,

                Settings.Global.SYS_STORAGE_THRESHOLD_MAX_BYTES, DEFAULT_THRESHOLD_MAX_BYTES);



        return Math.min(lowBytes, maxLowBytes);

    }



    /**

     * Return the number of available bytes at which the given path is

     * considered full.

     *

     * @hide

     */

    public long getStorageFullBytes(File path) {

        return Settings.Global.getLong(mResolver, Settings.Global.SYS_STORAGE_FULL_THRESHOLD_BYTES,

                DEFAULT_FULL_THRESHOLD_BYTES);

    }

}

services/java/com/android/server/DeviceStorageMonitorService.java

+30 −57
Original line number Diff line number Diff line
@@ -16,9 +16,6 @@ 


package com.android.server;



import java.io.FileDescriptor;

import java.io.PrintWriter;



import android.app.Notification;

import android.app.NotificationManager;

import android.app.PendingIntent;
@@ -40,12 +37,17 @@ import android.os.StatFs; 
import android.os.SystemClock;

import android.os.SystemProperties;

import android.os.UserHandle;

import android.os.storage.StorageManager;

import android.provider.Settings;

import android.text.format.Formatter;

import android.util.EventLog;

import android.util.Slog;

import android.util.TimeUtils;



import java.io.File;

import java.io.FileDescriptor;

import java.io.PrintWriter;



/**

 * This class implements a service to monitor the amount of disk

 * storage space on the device.  If the free storage on device is less
@@ -66,17 +68,18 @@ import android.util.TimeUtils; 
 */

public class DeviceStorageMonitorService extends Binder {

    private static final String TAG = "DeviceStorageMonitorService";



    private static final boolean DEBUG = false;

    private static final boolean localLOGV = false;



    private static final int DEVICE_MEMORY_WHAT = 1;

    private static final int MONITOR_INTERVAL = 1; //in minutes

    private static final int LOW_MEMORY_NOTIFICATION_ID = 1;

    private static final int DEFAULT_THRESHOLD_PERCENTAGE = 10;

    private static final int DEFAULT_THRESHOLD_MAX_BYTES = 500*1024*1024; // 500MB



    private static final int DEFAULT_FREE_STORAGE_LOG_INTERVAL_IN_MINUTES = 12*60; //in minutes

    private static final long DEFAULT_DISK_FREE_CHANGE_REPORTING_THRESHOLD = 2 * 1024 * 1024; // 2MB

    private static final long DEFAULT_CHECK_INTERVAL = MONITOR_INTERVAL*60*1000;

    private static final int DEFAULT_FULL_THRESHOLD_BYTES = 1024*1024; // 1MB



    private long mFreeMem;  // on /data

    private long mFreeMemAfterLastCacheClear;  // on /data

    private long mLastReportedFreeMem;
@@ -84,14 +87,16 @@ public class DeviceStorageMonitorService extends Binder { 
    private boolean mLowMemFlag=false;

    private boolean mMemFullFlag=false;

    private Context mContext;

    private ContentResolver mContentResolver;

    private ContentResolver mResolver;

    private long mTotalMemory;  // on /data

    private StatFs mDataFileStats;

    private StatFs mSystemFileStats;

    private StatFs mCacheFileStats;

    private static final String DATA_PATH = "/data";

    private static final String SYSTEM_PATH = "/system";

    private static final String CACHE_PATH = "/cache";



    private static final File DATA_PATH = Environment.getDataDirectory();

    private static final File SYSTEM_PATH = Environment.getRootDirectory();

    private static final File CACHE_PATH = Environment.getDownloadCacheDirectory();



    private long mThreadStartTime = -1;

    private boolean mClearSucceeded = false;

    private boolean mClearingCache;
@@ -116,7 +121,7 @@ public class DeviceStorageMonitorService extends Binder { 
    // more files than absolutely needed, to reduce the frequency that

    // flushing takes place.

    private long mMemCacheTrimToThreshold;

    private int mMemFullThreshold;

    private long mMemFullThreshold;



    /**

     * This string is used for ServiceManager access to this class.
@@ -151,7 +156,7 @@ public class DeviceStorageMonitorService extends Binder { 


    private final void restatDataDir() {

        try {

            mDataFileStats.restat(DATA_PATH);

            mDataFileStats.restat(DATA_PATH.getAbsolutePath());

            mFreeMem = (long) mDataFileStats.getAvailableBlocks() *

                mDataFileStats.getBlockSize();

        } catch (IllegalArgumentException e) {
@@ -163,7 +168,7 @@ public class DeviceStorageMonitorService extends Binder { 
            mFreeMem = Long.parseLong(debugFreeMem);

        }

        // Read the log interval from secure settings

        long freeMemLogInterval = Settings.Global.getLong(mContentResolver,

        long freeMemLogInterval = Settings.Global.getLong(mResolver,

                Settings.Global.SYS_FREE_STORAGE_LOG_INTERVAL,

                DEFAULT_FREE_STORAGE_LOG_INTERVAL_IN_MINUTES)*60*1000;

        //log the amount of free memory in event log
@@ -173,14 +178,14 @@ public class DeviceStorageMonitorService extends Binder { 
            mLastReportedFreeMemTime = currTime;

            long mFreeSystem = -1, mFreeCache = -1;

            try {

                mSystemFileStats.restat(SYSTEM_PATH);

                mSystemFileStats.restat(SYSTEM_PATH.getAbsolutePath());

                mFreeSystem = (long) mSystemFileStats.getAvailableBlocks() *

                    mSystemFileStats.getBlockSize();

            } catch (IllegalArgumentException e) {

                // ignore; report -1

            }

            try {

                mCacheFileStats.restat(CACHE_PATH);

                mCacheFileStats.restat(CACHE_PATH.getAbsolutePath());

                mFreeCache = (long) mCacheFileStats.getAvailableBlocks() *

                    mCacheFileStats.getBlockSize();

            } catch (IllegalArgumentException e) {
@@ -190,7 +195,7 @@ public class DeviceStorageMonitorService extends Binder { 
                                mFreeMem, mFreeSystem, mFreeCache);

        }

        // Read the reporting threshold from secure settings

        long threshold = Settings.Global.getLong(mContentResolver,

        long threshold = Settings.Global.getLong(mResolver,

                Settings.Global.DISK_FREE_CHANGE_REPORTING_THRESHOLD,

                DEFAULT_DISK_FREE_CHANGE_REPORTING_THRESHOLD);

        // If mFree changed significantly log the new value
@@ -303,40 +308,6 @@ public class DeviceStorageMonitorService extends Binder { 
                delay);

    }



    /*

     * just query settings to retrieve the memory threshold.

     * Preferred this over using a ContentObserver since Settings.Secure caches the value

     * any way

     */

    private long getMemThreshold() {

        long value = Settings.Global.getInt(

                              mContentResolver,

                              Settings.Global.SYS_STORAGE_THRESHOLD_PERCENTAGE,

                              DEFAULT_THRESHOLD_PERCENTAGE);

        if(localLOGV) Slog.v(TAG, "Threshold Percentage="+value);

        value = (value*mTotalMemory)/100;

        long maxValue = Settings.Global.getInt(

                mContentResolver,

                Settings.Global.SYS_STORAGE_THRESHOLD_MAX_BYTES,

                DEFAULT_THRESHOLD_MAX_BYTES);

        //evaluate threshold value

        return value < maxValue ? value : maxValue;

    }



    /*

     * just query settings to retrieve the memory full threshold.

     * Preferred this over using a ContentObserver since Settings.Secure caches the value

     * any way

     */

    private int getMemFullThreshold() {

        int value = Settings.Global.getInt(

                              mContentResolver,

                              Settings.Global.SYS_STORAGE_FULL_THRESHOLD_BYTES,

                              DEFAULT_FULL_THRESHOLD_BYTES);

        if(localLOGV) Slog.v(TAG, "Full Threshold Bytes="+value);

        return value;

    }



    /**

    * Constructor to run service. initializes the disk space threshold value

    * and posts an empty message to kickstart the process.
@@ -344,11 +315,11 @@ public class DeviceStorageMonitorService extends Binder { 
    public DeviceStorageMonitorService(Context context) {

        mLastReportedFreeMemTime = 0;

        mContext = context;

        mContentResolver = mContext.getContentResolver();

        mResolver = mContext.getContentResolver();

        //create StatFs object

        mDataFileStats = new StatFs(DATA_PATH);

        mSystemFileStats = new StatFs(SYSTEM_PATH);

        mCacheFileStats = new StatFs(CACHE_PATH);

        mDataFileStats = new StatFs(DATA_PATH.getAbsolutePath());

        mSystemFileStats = new StatFs(SYSTEM_PATH.getAbsolutePath());

        mCacheFileStats = new StatFs(CACHE_PATH.getAbsolutePath());

        //initialize total storage on device

        mTotalMemory = (long)mDataFileStats.getBlockCount() *

                        mDataFileStats.getBlockSize();
@@ -360,9 +331,12 @@ public class DeviceStorageMonitorService extends Binder { 
        mStorageFullIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);

        mStorageNotFullIntent = new Intent(Intent.ACTION_DEVICE_STORAGE_NOT_FULL);

        mStorageNotFullIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);



        // cache storage thresholds

        mMemLowThreshold = getMemThreshold();

        mMemFullThreshold = getMemFullThreshold();

        final StorageManager sm = StorageManager.from(context);

        mMemLowThreshold = sm.getStorageLowBytes(DATA_PATH);

        mMemFullThreshold = sm.getStorageFullBytes(DATA_PATH);



        mMemCacheStartTrimThreshold = ((mMemLowThreshold*3)+mMemFullThreshold)/4;

        mMemCacheTrimToThreshold = mMemLowThreshold

                + ((mMemLowThreshold-mMemCacheStartTrimThreshold)*2);
@@ -373,7 +347,6 @@ public class DeviceStorageMonitorService extends Binder { 
        mCacheFileDeletedObserver.startWatching();

    }





    /**

    * This method sends a notification to NotificationManager to display

    * an error dialog indicating low disk space and launch the Installer