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M7350/base/services/java/com/android/server/MountService.java

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M7350v1_en_gpl
2024-09-09 08:52:07 +00:00
/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.server;
import com.android.internal.app.IMediaContainerService;
import com.android.server.am.ActivityManagerService;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.ServiceConnection;
import android.content.pm.PackageManager;
import android.content.res.ObbInfo;
import android.net.Uri;
import android.os.Binder;
import android.os.Environment;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.IBinder;
import android.os.Looper;
import android.os.Message;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.SystemClock;
import android.os.SystemProperties;
import android.os.storage.IMountService;
import android.os.storage.IMountServiceListener;
import android.os.storage.IMountShutdownObserver;
import android.os.storage.IObbActionListener;
import android.os.storage.OnObbStateChangeListener;
import android.os.storage.StorageResultCode;
import android.util.Slog;
import java.io.FileDescriptor;
import java.io.IOException;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
/**
* MountService implements back-end services for platform storage
* management.
* @hide - Applications should use android.os.storage.StorageManager
* to access the MountService.
*/
class MountService extends IMountService.Stub
implements INativeDaemonConnectorCallbacks {
private static final boolean LOCAL_LOGD = false;
private static final boolean DEBUG_UNMOUNT = false;
private static final boolean DEBUG_EVENTS = false;
private static final boolean DEBUG_OBB = false;
private static final String TAG = "MountService";
private static final String VOLD_TAG = "VoldConnector";
/*
* Internal vold volume state constants
*/
class VolumeState {
public static final int Init = -1;
public static final int NoMedia = 0;
public static final int Idle = 1;
public static final int Pending = 2;
public static final int Checking = 3;
public static final int Mounted = 4;
public static final int Unmounting = 5;
public static final int Formatting = 6;
public static final int Shared = 7;
public static final int SharedMnt = 8;
}
/*
* Internal vold response code constants
*/
class VoldResponseCode {
/*
* 100 series - Requestion action was initiated; expect another reply
* before proceeding with a new command.
*/
public static final int VolumeListResult = 110;
public static final int AsecListResult = 111;
public static final int StorageUsersListResult = 112;
/*
* 200 series - Requestion action has been successfully completed.
*/
public static final int ShareStatusResult = 210;
public static final int AsecPathResult = 211;
public static final int ShareEnabledResult = 212;
/*
* 400 series - Command was accepted, but the requested action
* did not take place.
*/
public static final int OpFailedNoMedia = 401;
public static final int OpFailedMediaBlank = 402;
public static final int OpFailedMediaCorrupt = 403;
public static final int OpFailedVolNotMounted = 404;
public static final int OpFailedStorageBusy = 405;
public static final int OpFailedStorageNotFound = 406;
/*
* 600 series - Unsolicited broadcasts.
*/
public static final int VolumeStateChange = 605;
public static final int ShareAvailabilityChange = 620;
public static final int VolumeDiskInserted = 630;
public static final int VolumeDiskRemoved = 631;
public static final int VolumeBadRemoval = 632;
}
private Context mContext;
private NativeDaemonConnector mConnector;
private String mLegacyState = Environment.MEDIA_REMOVED;
private PackageManagerService mPms;
private boolean mUmsEnabling;
// Used as a lock for methods that register/unregister listeners.
final private ArrayList<MountServiceBinderListener> mListeners =
new ArrayList<MountServiceBinderListener>();
private boolean mBooted = false;
private boolean mReady = false;
private boolean mSendUmsConnectedOnBoot = false;
private boolean mShared = false;
/**
* Private hash of currently mounted secure containers.
* Used as a lock in methods to manipulate secure containers.
*/
final private HashSet<String> mAsecMountSet = new HashSet<String>();
/**
* The size of the crypto algorithm key in bits for OBB files. Currently
* Twofish is used which takes 128-bit keys.
*/
private static final int CRYPTO_ALGORITHM_KEY_SIZE = 128;
/**
* The number of times to run SHA1 in the PBKDF2 function for OBB files.
* 1024 is reasonably secure and not too slow.
*/
private static final int PBKDF2_HASH_ROUNDS = 1024;
/**
* Mounted OBB tracking information. Used to track the current state of all
* OBBs.
*/
final private Map<IBinder, List<ObbState>> mObbMounts = new HashMap<IBinder, List<ObbState>>();
final private Map<String, ObbState> mObbPathToStateMap = new HashMap<String, ObbState>();
class ObbState implements IBinder.DeathRecipient {
public ObbState(String filename, int callerUid, IObbActionListener token, int nonce)
throws RemoteException {
this.filename = filename;
this.callerUid = callerUid;
this.token = token;
this.nonce = nonce;
}
// OBB source filename
String filename;
// Binder.callingUid()
final public int callerUid;
// Token of remote Binder caller
final IObbActionListener token;
// Identifier to pass back to the token
final int nonce;
public IBinder getBinder() {
return token.asBinder();
}
@Override
public void binderDied() {
ObbAction action = new UnmountObbAction(this, true);
mObbActionHandler.sendMessage(mObbActionHandler.obtainMessage(OBB_RUN_ACTION, action));
}
public void link() throws RemoteException {
getBinder().linkToDeath(this, 0);
}
public void unlink() {
getBinder().unlinkToDeath(this, 0);
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder("ObbState{");
sb.append("filename=");
sb.append(filename);
sb.append(",token=");
sb.append(token.toString());
sb.append(",callerUid=");
sb.append(callerUid);
sb.append('}');
return sb.toString();
}
}
// OBB Action Handler
final private ObbActionHandler mObbActionHandler;
// OBB action handler messages
private static final int OBB_RUN_ACTION = 1;
private static final int OBB_MCS_BOUND = 2;
private static final int OBB_MCS_UNBIND = 3;
private static final int OBB_MCS_RECONNECT = 4;
private static final int OBB_FLUSH_MOUNT_STATE = 5;
/*
* Default Container Service information
*/
static final ComponentName DEFAULT_CONTAINER_COMPONENT = new ComponentName(
"com.android.defcontainer", "com.android.defcontainer.DefaultContainerService");
final private DefaultContainerConnection mDefContainerConn = new DefaultContainerConnection();
class DefaultContainerConnection implements ServiceConnection {
public void onServiceConnected(ComponentName name, IBinder service) {
if (DEBUG_OBB)
Slog.i(TAG, "onServiceConnected");
IMediaContainerService imcs = IMediaContainerService.Stub.asInterface(service);
mObbActionHandler.sendMessage(mObbActionHandler.obtainMessage(OBB_MCS_BOUND, imcs));
}
public void onServiceDisconnected(ComponentName name) {
if (DEBUG_OBB)
Slog.i(TAG, "onServiceDisconnected");
}
};
// Used in the ObbActionHandler
private IMediaContainerService mContainerService = null;
// Handler messages
private static final int H_UNMOUNT_PM_UPDATE = 1;
private static final int H_UNMOUNT_PM_DONE = 2;
private static final int H_UNMOUNT_MS = 3;
private static final int RETRY_UNMOUNT_DELAY = 30; // in ms
private static final int MAX_UNMOUNT_RETRIES = 4;
class UnmountCallBack {
final String path;
final boolean force;
int retries;
UnmountCallBack(String path, boolean force) {
retries = 0;
this.path = path;
this.force = force;
}
void handleFinished() {
if (DEBUG_UNMOUNT) Slog.i(TAG, "Unmounting " + path);
doUnmountVolume(path, true);
}
}
class UmsEnableCallBack extends UnmountCallBack {
final String method;
UmsEnableCallBack(String path, String method, boolean force) {
super(path, force);
this.method = method;
}
@Override
void handleFinished() {
super.handleFinished();
doShareUnshareVolume(path, method, true);
}
}
class ShutdownCallBack extends UnmountCallBack {
IMountShutdownObserver observer;
ShutdownCallBack(String path, IMountShutdownObserver observer) {
super(path, true);
this.observer = observer;
}
@Override
void handleFinished() {
int ret = doUnmountVolume(path, true);
if (observer != null) {
try {
observer.onShutDownComplete(ret);
} catch (RemoteException e) {
Slog.w(TAG, "RemoteException when shutting down");
}
}
}
}
class MountServiceHandler extends Handler {
ArrayList<UnmountCallBack> mForceUnmounts = new ArrayList<UnmountCallBack>();
boolean mUpdatingStatus = false;
MountServiceHandler(Looper l) {
super(l);
}
public void handleMessage(Message msg) {
switch (msg.what) {
case H_UNMOUNT_PM_UPDATE: {
if (DEBUG_UNMOUNT) Slog.i(TAG, "H_UNMOUNT_PM_UPDATE");
UnmountCallBack ucb = (UnmountCallBack) msg.obj;
mForceUnmounts.add(ucb);
if (DEBUG_UNMOUNT) Slog.i(TAG, " registered = " + mUpdatingStatus);
// Register only if needed.
if (!mUpdatingStatus) {
if (DEBUG_UNMOUNT) Slog.i(TAG, "Updating external media status on PackageManager");
mUpdatingStatus = true;
mPms.updateExternalMediaStatus(false, true);
}
break;
}
case H_UNMOUNT_PM_DONE: {
if (DEBUG_UNMOUNT) Slog.i(TAG, "H_UNMOUNT_PM_DONE");
if (DEBUG_UNMOUNT) Slog.i(TAG, "Updated status. Processing requests");
mUpdatingStatus = false;
int size = mForceUnmounts.size();
int sizeArr[] = new int[size];
int sizeArrN = 0;
// Kill processes holding references first
ActivityManagerService ams = (ActivityManagerService)
ServiceManager.getService("activity");
for (int i = 0; i < size; i++) {
UnmountCallBack ucb = mForceUnmounts.get(i);
String path = ucb.path;
boolean done = false;
if (!ucb.force) {
done = true;
} else {
int pids[] = getStorageUsers(path);
if (pids == null || pids.length == 0) {
done = true;
} else {
// Eliminate system process here?
ams.killPids(pids, "unmount media");
// Confirm if file references have been freed.
pids = getStorageUsers(path);
if (pids == null || pids.length == 0) {
done = true;
}
}
}
if (!done && (ucb.retries < MAX_UNMOUNT_RETRIES)) {
// Retry again
Slog.i(TAG, "Retrying to kill storage users again");
mHandler.sendMessageDelayed(
mHandler.obtainMessage(H_UNMOUNT_PM_DONE,
ucb.retries++),
RETRY_UNMOUNT_DELAY);
} else {
if (ucb.retries >= MAX_UNMOUNT_RETRIES) {
Slog.i(TAG, "Failed to unmount media inspite of " +
MAX_UNMOUNT_RETRIES + " retries. Forcibly killing processes now");
}
sizeArr[sizeArrN++] = i;
mHandler.sendMessage(mHandler.obtainMessage(H_UNMOUNT_MS,
ucb));
}
}
// Remove already processed elements from list.
for (int i = (sizeArrN-1); i >= 0; i--) {
mForceUnmounts.remove(sizeArr[i]);
}
break;
}
case H_UNMOUNT_MS : {
if (DEBUG_UNMOUNT) Slog.i(TAG, "H_UNMOUNT_MS");
UnmountCallBack ucb = (UnmountCallBack) msg.obj;
ucb.handleFinished();
break;
}
}
}
};
final private HandlerThread mHandlerThread;
final private Handler mHandler;
private void waitForReady() {
while (mReady == false) {
for (int retries = 5; retries > 0; retries--) {
if (mReady) {
return;
}
SystemClock.sleep(1000);
}
Slog.w(TAG, "Waiting too long for mReady!");
}
}
private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action.equals(Intent.ACTION_BOOT_COMPLETED)) {
mBooted = true;
/*
* In the simulator, we need to broadcast a volume mounted event
* to make the media scanner run.
*/
if ("simulator".equals(SystemProperties.get("ro.product.device"))) {
notifyVolumeStateChange(null, "/sdcard", VolumeState.NoMedia, VolumeState.Mounted);
return;
}
new Thread() {
public void run() {
try {
String path = Environment.getExternalStorageDirectory().getPath();
String state = getVolumeState(path);
if (state.equals(Environment.MEDIA_UNMOUNTED)) {
int rc = doMountVolume(path);
if (rc != StorageResultCode.OperationSucceeded) {
Slog.e(TAG, String.format("Boot-time mount failed (%d)", rc));
}
} else if (state.equals(Environment.MEDIA_SHARED)) {
/*
* Bootstrap UMS enabled state since vold indicates
* the volume is shared (runtime restart while ums enabled)
*/
notifyVolumeStateChange(null, path, VolumeState.NoMedia, VolumeState.Shared);
}
/*
* If UMS was connected on boot, send the connected event
* now that we're up.
*/
if (mSendUmsConnectedOnBoot) {
sendUmsIntent(true);
mSendUmsConnectedOnBoot = false;
}
} catch (Exception ex) {
Slog.e(TAG, "Boot-time mount exception", ex);
}
}
}.start();
}
}
};
private final class MountServiceBinderListener implements IBinder.DeathRecipient {
final IMountServiceListener mListener;
MountServiceBinderListener(IMountServiceListener listener) {
mListener = listener;
}
public void binderDied() {
if (LOCAL_LOGD) Slog.d(TAG, "An IMountServiceListener has died!");
synchronized (mListeners) {
mListeners.remove(this);
mListener.asBinder().unlinkToDeath(this, 0);
}
}
}
private void doShareUnshareVolume(String path, String method, boolean enable) {
// TODO: Add support for multiple share methods
if (!method.equals("ums")) {
throw new IllegalArgumentException(String.format("Method %s not supported", method));
}
try {
mConnector.doCommand(String.format(
"volume %sshare %s %s", (enable ? "" : "un"), path, method));
} catch (NativeDaemonConnectorException e) {
Slog.e(TAG, "Failed to share/unshare", e);
}
}
private void updatePublicVolumeState(String path, String state) {
if (!path.equals(Environment.getExternalStorageDirectory().getPath())) {
Slog.w(TAG, "Multiple volumes not currently supported");
return;
}
if (mLegacyState.equals(state)) {
Slog.w(TAG, String.format("Duplicate state transition (%s -> %s)", mLegacyState, state));
return;
}
if (Environment.MEDIA_UNMOUNTED.equals(state)) {
// Tell the package manager the media is gone.
mPms.updateExternalMediaStatus(false, false);
/*
* Some OBBs might have been unmounted when this volume was
* unmounted, so send a message to the handler to let it know to
* remove those from the list of mounted OBBS.
*/
mObbActionHandler.sendMessage(mObbActionHandler.obtainMessage(OBB_FLUSH_MOUNT_STATE,
path));
} else if (Environment.MEDIA_MOUNTED.equals(state)) {
// Tell the package manager the media is available for use.
mPms.updateExternalMediaStatus(true, false);
}
String oldState = mLegacyState;
mLegacyState = state;
synchronized (mListeners) {
for (int i = mListeners.size() -1; i >= 0; i--) {
MountServiceBinderListener bl = mListeners.get(i);
try {
bl.mListener.onStorageStateChanged(path, oldState, state);
} catch (RemoteException rex) {
Slog.e(TAG, "Listener dead");
mListeners.remove(i);
} catch (Exception ex) {
Slog.e(TAG, "Listener failed", ex);
}
}
}
}
/**
*
* Callback from NativeDaemonConnector
*/
public void onDaemonConnected() {
/*
* Since we'll be calling back into the NativeDaemonConnector,
* we need to do our work in a new thread.
*/
new Thread() {
public void run() {
/**
* Determine media state and UMS detection status
*/
String path = Environment.getExternalStorageDirectory().getPath();
String state = Environment.MEDIA_REMOVED;
try {
String[] vols = mConnector.doListCommand(
"volume list", VoldResponseCode.VolumeListResult);
for (String volstr : vols) {
String[] tok = volstr.split(" ");
// FMT: <label> <mountpoint> <state>
if (!tok[1].equals(path)) {
Slog.w(TAG, String.format(
"Skipping unknown volume '%s'",tok[1]));
continue;
}
int st = Integer.parseInt(tok[2]);
if (st == VolumeState.NoMedia) {
state = Environment.MEDIA_REMOVED;
} else if (st == VolumeState.Idle) {
state = Environment.MEDIA_UNMOUNTED;
} else if (st == VolumeState.Mounted) {
state = Environment.MEDIA_MOUNTED;
Slog.i(TAG, "Media already mounted on daemon connection");
} else if (st == VolumeState.Shared) {
state = Environment.MEDIA_SHARED;
Slog.i(TAG, "Media shared on daemon connection");
} else {
throw new Exception(String.format("Unexpected state %d", st));
}
}
if (state != null) {
if (DEBUG_EVENTS) Slog.i(TAG, "Updating valid state " + state);
updatePublicVolumeState(path, state);
}
} catch (Exception e) {
Slog.e(TAG, "Error processing initial volume state", e);
updatePublicVolumeState(path, Environment.MEDIA_REMOVED);
}
try {
boolean avail = doGetShareMethodAvailable("ums");
notifyShareAvailabilityChange("ums", avail);
} catch (Exception ex) {
Slog.w(TAG, "Failed to get share availability");
}
/*
* Now that we've done our initialization, release
* the hounds!
*/
mReady = true;
}
}.start();
}
/**
* Callback from NativeDaemonConnector
*/
public boolean onEvent(int code, String raw, String[] cooked) {
Intent in = null;
if (DEBUG_EVENTS) {
StringBuilder builder = new StringBuilder();
builder.append("onEvent::");
builder.append(" raw= " + raw);
if (cooked != null) {
builder.append(" cooked = " );
for (String str : cooked) {
builder.append(" " + str);
}
}
Slog.i(TAG, builder.toString());
}
if (code == VoldResponseCode.VolumeStateChange) {
/*
* One of the volumes we're managing has changed state.
* Format: "NNN Volume <label> <path> state changed
* from <old_#> (<old_str>) to <new_#> (<new_str>)"
*/
notifyVolumeStateChange(
cooked[2], cooked[3], Integer.parseInt(cooked[7]),
Integer.parseInt(cooked[10]));
} else if (code == VoldResponseCode.ShareAvailabilityChange) {
// FMT: NNN Share method <method> now <available|unavailable>
boolean avail = false;
if (cooked[5].equals("available")) {
avail = true;
}
notifyShareAvailabilityChange(cooked[3], avail);
} else if ((code == VoldResponseCode.VolumeDiskInserted) ||
(code == VoldResponseCode.VolumeDiskRemoved) ||
(code == VoldResponseCode.VolumeBadRemoval)) {
// FMT: NNN Volume <label> <mountpoint> disk inserted (<major>:<minor>)
// FMT: NNN Volume <label> <mountpoint> disk removed (<major>:<minor>)
// FMT: NNN Volume <label> <mountpoint> bad removal (<major>:<minor>)
final String label = cooked[2];
final String path = cooked[3];
int major = -1;
int minor = -1;
try {
String devComp = cooked[6].substring(1, cooked[6].length() -1);
String[] devTok = devComp.split(":");
major = Integer.parseInt(devTok[0]);
minor = Integer.parseInt(devTok[1]);
} catch (Exception ex) {
Slog.e(TAG, "Failed to parse major/minor", ex);
}
if (code == VoldResponseCode.VolumeDiskInserted) {
new Thread() {
public void run() {
try {
int rc;
if ((rc = doMountVolume(path)) != StorageResultCode.OperationSucceeded) {
Slog.w(TAG, String.format("Insertion mount failed (%d)", rc));
}
} catch (Exception ex) {
Slog.w(TAG, "Failed to mount media on insertion", ex);
}
}
}.start();
} else if (code == VoldResponseCode.VolumeDiskRemoved) {
/*
* This event gets trumped if we're already in BAD_REMOVAL state
*/
if (getVolumeState(path).equals(Environment.MEDIA_BAD_REMOVAL)) {
return true;
}
/* Send the media unmounted event first */
if (DEBUG_EVENTS) Slog.i(TAG, "Sending unmounted event first");
updatePublicVolumeState(path, Environment.MEDIA_UNMOUNTED);
in = new Intent(Intent.ACTION_MEDIA_UNMOUNTED, Uri.parse("file://" + path));
mContext.sendBroadcast(in);
if (DEBUG_EVENTS) Slog.i(TAG, "Sending media removed");
updatePublicVolumeState(path, Environment.MEDIA_REMOVED);
in = new Intent(Intent.ACTION_MEDIA_REMOVED, Uri.parse("file://" + path));
} else if (code == VoldResponseCode.VolumeBadRemoval) {
if (DEBUG_EVENTS) Slog.i(TAG, "Sending unmounted event first");
/* Send the media unmounted event first */
updatePublicVolumeState(path, Environment.MEDIA_UNMOUNTED);
in = new Intent(Intent.ACTION_MEDIA_UNMOUNTED, Uri.parse("file://" + path));
mContext.sendBroadcast(in);
if (DEBUG_EVENTS) Slog.i(TAG, "Sending media bad removal");
updatePublicVolumeState(path, Environment.MEDIA_BAD_REMOVAL);
in = new Intent(Intent.ACTION_MEDIA_BAD_REMOVAL, Uri.parse("file://" + path));
} else {
Slog.e(TAG, String.format("Unknown code {%d}", code));
}
} else {
return false;
}
if (in != null) {
mContext.sendBroadcast(in);
}
return true;
}
private void notifyVolumeStateChange(String label, String path, int oldState, int newState) {
String vs = getVolumeState(path);
if (DEBUG_EVENTS) Slog.i(TAG, "notifyVolumeStateChanged::" + vs);
Intent in = null;
if (oldState == VolumeState.Shared && newState != oldState) {
if (LOCAL_LOGD) Slog.d(TAG, "Sending ACTION_MEDIA_UNSHARED intent");
mContext.sendBroadcast(new Intent(Intent.ACTION_MEDIA_UNSHARED,
Uri.parse("file://" + path)));
}
if (newState == VolumeState.Init) {
} else if (newState == VolumeState.NoMedia) {
// NoMedia is handled via Disk Remove events
} else if (newState == VolumeState.Idle) {
/*
* Don't notify if we're in BAD_REMOVAL, NOFS, UNMOUNTABLE, or
* if we're in the process of enabling UMS
*/
if (!vs.equals(
Environment.MEDIA_BAD_REMOVAL) && !vs.equals(
Environment.MEDIA_NOFS) && !vs.equals(
Environment.MEDIA_UNMOUNTABLE) && !getUmsEnabling()) {
if (DEBUG_EVENTS) Slog.i(TAG, "updating volume state for media bad removal nofs and unmountable");
updatePublicVolumeState(path, Environment.MEDIA_UNMOUNTED);
in = new Intent(Intent.ACTION_MEDIA_UNMOUNTED, Uri.parse("file://" + path));
}
} else if (newState == VolumeState.Pending) {
} else if (newState == VolumeState.Checking) {
if (DEBUG_EVENTS) Slog.i(TAG, "updating volume state checking");
updatePublicVolumeState(path, Environment.MEDIA_CHECKING);
in = new Intent(Intent.ACTION_MEDIA_CHECKING, Uri.parse("file://" + path));
} else if (newState == VolumeState.Mounted) {
if (DEBUG_EVENTS) Slog.i(TAG, "updating volume state mounted");
updatePublicVolumeState(path, Environment.MEDIA_MOUNTED);
in = new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://" + path));
in.putExtra("read-only", false);
} else if (newState == VolumeState.Unmounting) {
updatePublicVolumeState(path, Environment.MEDIA_UNMOUNTED);
in = new Intent(Intent.ACTION_MEDIA_EJECT, Uri.parse("file://" + path));
} else if (newState == VolumeState.Formatting) {
} else if (newState == VolumeState.Shared) {
if (DEBUG_EVENTS) Slog.i(TAG, "Updating volume state media mounted");
/* Send the media unmounted event first */
updatePublicVolumeState(path, Environment.MEDIA_UNMOUNTED);
in = new Intent(Intent.ACTION_MEDIA_UNMOUNTED, Uri.parse("file://" + path));
mContext.sendBroadcast(in);
if (DEBUG_EVENTS) Slog.i(TAG, "Updating media shared");
updatePublicVolumeState(path, Environment.MEDIA_SHARED);
in = new Intent(Intent.ACTION_MEDIA_SHARED, Uri.parse("file://" + path));
if (LOCAL_LOGD) Slog.d(TAG, "Sending ACTION_MEDIA_SHARED intent");
} else if (newState == VolumeState.SharedMnt) {
Slog.e(TAG, "Live shared mounts not supported yet!");
return;
} else {
Slog.e(TAG, "Unhandled VolumeState {" + newState + "}");
}
if (in != null) {
mContext.sendBroadcast(in);
}
}
private boolean doGetShareMethodAvailable(String method) {
ArrayList<String> rsp;
try {
rsp = mConnector.doCommand("share status " + method);
} catch (NativeDaemonConnectorException ex) {
Slog.e(TAG, "Failed to determine whether share method " + method + " is available.");
return false;
}
for (String line : rsp) {
String[] tok = line.split(" ");
if (tok.length < 3) {
Slog.e(TAG, "Malformed response to share status " + method);
return false;
}
int code;
try {
code = Integer.parseInt(tok[0]);
} catch (NumberFormatException nfe) {
Slog.e(TAG, String.format("Error parsing code %s", tok[0]));
return false;
}
if (code == VoldResponseCode.ShareStatusResult) {
if (tok[2].equals("available"))
return true;
return false;
} else {
Slog.e(TAG, String.format("Unexpected response code %d", code));
return false;
}
}
Slog.e(TAG, "Got an empty response");
return false;
}
private int doMountVolume(String path) {
int rc = StorageResultCode.OperationSucceeded;
if (DEBUG_EVENTS) Slog.i(TAG, "doMountVolume: Mouting " + path);
try {
mConnector.doCommand(String.format("volume mount %s", path));
} catch (NativeDaemonConnectorException e) {
/*
* Mount failed for some reason
*/
Intent in = null;
int code = e.getCode();
if (code == VoldResponseCode.OpFailedNoMedia) {
/*
* Attempt to mount but no media inserted
*/
rc = StorageResultCode.OperationFailedNoMedia;
} else if (code == VoldResponseCode.OpFailedMediaBlank) {
if (DEBUG_EVENTS) Slog.i(TAG, " updating volume state :: media nofs");
/*
* Media is blank or does not contain a supported filesystem
*/
updatePublicVolumeState(path, Environment.MEDIA_NOFS);
in = new Intent(Intent.ACTION_MEDIA_NOFS, Uri.parse("file://" + path));
rc = StorageResultCode.OperationFailedMediaBlank;
} else if (code == VoldResponseCode.OpFailedMediaCorrupt) {
if (DEBUG_EVENTS) Slog.i(TAG, "updating volume state media corrupt");
/*
* Volume consistency check failed
*/
updatePublicVolumeState(path, Environment.MEDIA_UNMOUNTABLE);
in = new Intent(Intent.ACTION_MEDIA_UNMOUNTABLE, Uri.parse("file://" + path));
rc = StorageResultCode.OperationFailedMediaCorrupt;
} else {
rc = StorageResultCode.OperationFailedInternalError;
}
/*
* Send broadcast intent (if required for the failure)
*/
if (in != null) {
mContext.sendBroadcast(in);
}
}
return rc;
}
/*
* If force is not set, we do not unmount if there are
* processes holding references to the volume about to be unmounted.
* If force is set, all the processes holding references need to be
* killed via the ActivityManager before actually unmounting the volume.
* This might even take a while and might be retried after timed delays
* to make sure we dont end up in an instable state and kill some core
* processes.
*/
private int doUnmountVolume(String path, boolean force) {
if (!getVolumeState(path).equals(Environment.MEDIA_MOUNTED)) {
return VoldResponseCode.OpFailedVolNotMounted;
}
/*
* Force a GC to make sure AssetManagers in other threads of the
* system_server are cleaned up. We have to do this since AssetManager
* instances are kept as a WeakReference and it's possible we have files
* open on the external storage.
*/
Runtime.getRuntime().gc();
// Redundant probably. But no harm in updating state again.
mPms.updateExternalMediaStatus(false, false);
try {
mConnector.doCommand(String.format(
"volume unmount %s%s", path, (force ? " force" : "")));
// We unmounted the volume. None of the asec containers are available now.
synchronized (mAsecMountSet) {
mAsecMountSet.clear();
}
return StorageResultCode.OperationSucceeded;
} catch (NativeDaemonConnectorException e) {
// Don't worry about mismatch in PackageManager since the
// call back will handle the status changes any way.
int code = e.getCode();
if (code == VoldResponseCode.OpFailedVolNotMounted) {
return StorageResultCode.OperationFailedStorageNotMounted;
} else if (code == VoldResponseCode.OpFailedStorageBusy) {
return StorageResultCode.OperationFailedStorageBusy;
} else {
return StorageResultCode.OperationFailedInternalError;
}
}
}
private int doFormatVolume(String path) {
try {
String cmd = String.format("volume format %s", path);
mConnector.doCommand(cmd);
return StorageResultCode.OperationSucceeded;
} catch (NativeDaemonConnectorException e) {
int code = e.getCode();
if (code == VoldResponseCode.OpFailedNoMedia) {
return StorageResultCode.OperationFailedNoMedia;
} else if (code == VoldResponseCode.OpFailedMediaCorrupt) {
return StorageResultCode.OperationFailedMediaCorrupt;
} else {
return StorageResultCode.OperationFailedInternalError;
}
}
}
private boolean doGetVolumeShared(String path, String method) {
String cmd = String.format("volume shared %s %s", path, method);
ArrayList<String> rsp;
try {
rsp = mConnector.doCommand(cmd);
} catch (NativeDaemonConnectorException ex) {
Slog.e(TAG, "Failed to read response to volume shared " + path + " " + method);
return false;
}
for (String line : rsp) {
String[] tok = line.split(" ");
if (tok.length < 3) {
Slog.e(TAG, "Malformed response to volume shared " + path + " " + method + " command");
return false;
}
int code;
try {
code = Integer.parseInt(tok[0]);
} catch (NumberFormatException nfe) {
Slog.e(TAG, String.format("Error parsing code %s", tok[0]));
return false;
}
if (code == VoldResponseCode.ShareEnabledResult) {
return "enabled".equals(tok[2]);
} else {
Slog.e(TAG, String.format("Unexpected response code %d", code));
return false;
}
}
Slog.e(TAG, "Got an empty response");
return false;
}
private void notifyShareAvailabilityChange(String method, final boolean avail) {
if (!method.equals("ums")) {
Slog.w(TAG, "Ignoring unsupported share method {" + method + "}");
return;
}
synchronized (mListeners) {
for (int i = mListeners.size() -1; i >= 0; i--) {
MountServiceBinderListener bl = mListeners.get(i);
try {
bl.mListener.onUsbMassStorageConnectionChanged(avail);
} catch (RemoteException rex) {
Slog.e(TAG, "Listener dead");
mListeners.remove(i);
} catch (Exception ex) {
Slog.e(TAG, "Listener failed", ex);
}
}
}
if (mBooted == true) {
sendUmsIntent(avail);
} else {
mSendUmsConnectedOnBoot = avail;
}
final String path = Environment.getExternalStorageDirectory().getPath();
if (avail == false && mShared == true) {
/*
* USB mass storage disconnected while enabled
*/
new Thread() {
public void run() {
/*
* If USB disconnected while UMS enable, we wait for
* volume state change to shared
*/
while (!(getVolumeState(path).equals(Environment.MEDIA_SHARED))) {
SystemClock.sleep (100);
}
enableShared(false);
try {
int rc;
Slog.w(TAG, "Disabling UMS after cable disconnect");
doShareUnshareVolume(path, "ums", false);
if ((rc = doMountVolume(path)) != StorageResultCode.OperationSucceeded) {
Slog.e(TAG, String.format(
"Failed to remount {%s} on UMS enabled-disconnect (%d)",
path, rc));
}
} catch (Exception ex) {
Slog.w(TAG, "Failed to mount media on UMS enabled-disconnect", ex);
}
}
}.start();
}
}
private void sendUmsIntent(boolean c) {
mContext.sendBroadcast(
new Intent((c ? Intent.ACTION_UMS_CONNECTED : Intent.ACTION_UMS_DISCONNECTED)));
}
private void validatePermission(String perm) {
if (mContext.checkCallingOrSelfPermission(perm) != PackageManager.PERMISSION_GRANTED) {
throw new SecurityException(String.format("Requires %s permission", perm));
}
}
/**
* Constructs a new MountService instance
*
* @param context Binder context for this service
*/
public MountService(Context context) {
mContext = context;
// XXX: This will go away soon in favor of IMountServiceObserver
mPms = (PackageManagerService) ServiceManager.getService("package");
mContext.registerReceiver(mBroadcastReceiver,
new IntentFilter(Intent.ACTION_BOOT_COMPLETED), null, null);
mHandlerThread = new HandlerThread("MountService");
mHandlerThread.start();
mHandler = new MountServiceHandler(mHandlerThread.getLooper());
// Add OBB Action Handler to MountService thread.
mObbActionHandler = new ObbActionHandler(mHandlerThread.getLooper());
/*
* Vold does not run in the simulator, so pretend the connector thread
* ran and did its thing.
*/
if ("simulator".equals(SystemProperties.get("ro.product.device"))) {
mReady = true;
mUmsEnabling = true;
return;
}
/*
* Create the connection to vold with a maximum queue of twice the
* amount of containers we'd ever expect to have. This keeps an
* "asec list" from blocking a thread repeatedly.
*/
mConnector = new NativeDaemonConnector(this, "vold",
PackageManagerService.MAX_CONTAINERS * 2, VOLD_TAG);
mReady = false;
Thread thread = new Thread(mConnector, VOLD_TAG);
thread.start();
}
/**
* Exposed API calls below here
*/
public void registerListener(IMountServiceListener listener) {
synchronized (mListeners) {
MountServiceBinderListener bl = new MountServiceBinderListener(listener);
try {
listener.asBinder().linkToDeath(bl, 0);
mListeners.add(bl);
} catch (RemoteException rex) {
Slog.e(TAG, "Failed to link to listener death");
}
}
}
public void unregisterListener(IMountServiceListener listener) {
synchronized (mListeners) {
for(MountServiceBinderListener bl : mListeners) {
if (bl.mListener == listener) {
mListeners.remove(mListeners.indexOf(bl));
return;
}
}
}
}
public void shutdown(final IMountShutdownObserver observer) {
validatePermission(android.Manifest.permission.SHUTDOWN);
Slog.i(TAG, "Shutting down");
String path = Environment.getExternalStorageDirectory().getPath();
String state = getVolumeState(path);
if (state.equals(Environment.MEDIA_SHARED)) {
/*
* If the media is currently shared, unshare it.
* XXX: This is still dangerous!. We should not
* be rebooting at *all* if UMS is enabled, since
* the UMS host could have dirty FAT cache entries
* yet to flush.
*/
setUsbMassStorageEnabled(false);
} else if (state.equals(Environment.MEDIA_CHECKING)) {
/*
* If the media is being checked, then we need to wait for
* it to complete before being able to proceed.
*/
// XXX: @hackbod - Should we disable the ANR timer here?
int retries = 30;
while (state.equals(Environment.MEDIA_CHECKING) && (retries-- >=0)) {
try {
Thread.sleep(1000);
} catch (InterruptedException iex) {
Slog.e(TAG, "Interrupted while waiting for media", iex);
break;
}
state = Environment.getExternalStorageState();
}
if (retries == 0) {
Slog.e(TAG, "Timed out waiting for media to check");
}
}
if (state.equals(Environment.MEDIA_MOUNTED)) {
// Post a unmount message.
ShutdownCallBack ucb = new ShutdownCallBack(path, observer);
mHandler.sendMessage(mHandler.obtainMessage(H_UNMOUNT_PM_UPDATE, ucb));
} else if (observer != null) {
/*
* Observer is waiting for onShutDownComplete when we are done.
* Since nothing will be done send notification directly so shutdown
* sequence can continue.
*/
try {
observer.onShutDownComplete(StorageResultCode.OperationSucceeded);
} catch (RemoteException e) {
Slog.w(TAG, "RemoteException when shutting down");
}
}
}
private boolean getUmsEnabling() {
synchronized (mListeners) {
return mUmsEnabling;
}
}
private void setUmsEnabling(boolean enable) {
synchronized (mListeners) {
mUmsEnabling = enable;
}
}
public boolean isUsbMassStorageConnected() {
waitForReady();
if (getUmsEnabling()) {
return true;
}
return doGetShareMethodAvailable("ums");
}
/*
* If UMS is enabled volume goes into Shared state
* with this flag we can handle USB disconnect while volume
* state is changing to Shared
*
*/
public void enableShared(boolean enable) {
mShared = enable;
}
public void setUsbMassStorageEnabled(boolean enable) {
waitForReady();
validatePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS);
// TODO: Add support for multiple share methods
/*
* If the volume is mounted and we're enabling then unmount it
*/
Slog.d(TAG, "setUsbMassStorageEnabled: enable "+enable);
String path = Environment.getExternalStorageDirectory().getPath();
String vs = getVolumeState(path);
String method = "ums";
if (enable && vs.equals(Environment.MEDIA_MOUNTED)) {
// Override for isUsbMassStorageEnabled()
setUmsEnabling(enable);
UmsEnableCallBack umscb = new UmsEnableCallBack(path, method, true);
mHandler.sendMessage(mHandler.obtainMessage(H_UNMOUNT_PM_UPDATE, umscb));
// Clear override
setUmsEnabling(false);
}
/*
* If we disabled UMS then mount the volume
*/
if (!enable) {
doShareUnshareVolume(path, method, enable);
if (doMountVolume(path) != StorageResultCode.OperationSucceeded) {
Slog.e(TAG, "Failed to remount " + path +
" after disabling share method " + method);
/*
* Even though the mount failed, the unshare didn't so don't indicate an error.
* The mountVolume() call will have set the storage state and sent the necessary
* broadcasts.
*/
}
}
}
public boolean isUsbMassStorageEnabled() {
waitForReady();
return doGetVolumeShared(Environment.getExternalStorageDirectory().getPath(), "ums");
}
/**
* @return state of the volume at the specified mount point
*/
public String getVolumeState(String mountPoint) {
/*
* XXX: Until we have multiple volume discovery, just hardwire
* this to /sdcard
*/
if (!mountPoint.equals(Environment.getExternalStorageDirectory().getPath())) {
Slog.w(TAG, "getVolumeState(" + mountPoint + "): Unknown volume");
throw new IllegalArgumentException();
}
return mLegacyState;
}
public int mountVolume(String path) {
validatePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS);
waitForReady();
return doMountVolume(path);
}
public void unmountVolume(String path, boolean force) {
validatePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS);
waitForReady();
String volState = getVolumeState(path);
if (DEBUG_UNMOUNT) Slog.i(TAG, "Unmounting " + path + " force = " + force);
if (Environment.MEDIA_UNMOUNTED.equals(volState) ||
Environment.MEDIA_REMOVED.equals(volState) ||
Environment.MEDIA_SHARED.equals(volState) ||
Environment.MEDIA_UNMOUNTABLE.equals(volState)) {
// Media already unmounted or cannot be unmounted.
// TODO return valid return code when adding observer call back.
return;
}
UnmountCallBack ucb = new UnmountCallBack(path, force);
mHandler.sendMessage(mHandler.obtainMessage(H_UNMOUNT_PM_UPDATE, ucb));
}
public int formatVolume(String path) {
validatePermission(android.Manifest.permission.MOUNT_FORMAT_FILESYSTEMS);
waitForReady();
return doFormatVolume(path);
}
public int []getStorageUsers(String path) {
validatePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS);
waitForReady();
try {
String[] r = mConnector.doListCommand(
String.format("storage users %s", path),
VoldResponseCode.StorageUsersListResult);
// FMT: <pid> <process name>
int[] data = new int[r.length];
for (int i = 0; i < r.length; i++) {
String []tok = r[i].split(" ");
try {
data[i] = Integer.parseInt(tok[0]);
} catch (NumberFormatException nfe) {
Slog.e(TAG, String.format("Error parsing pid %s", tok[0]));
return new int[0];
}
}
return data;
} catch (NativeDaemonConnectorException e) {
Slog.e(TAG, "Failed to retrieve storage users list", e);
return new int[0];
}
}
private void warnOnNotMounted() {
if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
Slog.w(TAG, "getSecureContainerList() called when storage not mounted");
}
}
public String[] getSecureContainerList() {
validatePermission(android.Manifest.permission.ASEC_ACCESS);
waitForReady();
warnOnNotMounted();
try {
return mConnector.doListCommand("asec list", VoldResponseCode.AsecListResult);
} catch (NativeDaemonConnectorException e) {
return new String[0];
}
}
public int createSecureContainer(String id, int sizeMb, String fstype,
String key, int ownerUid) {
validatePermission(android.Manifest.permission.ASEC_CREATE);
waitForReady();
warnOnNotMounted();
int rc = StorageResultCode.OperationSucceeded;
String cmd = String.format("asec create %s %d %s %s %d", id, sizeMb, fstype, key, ownerUid);
try {
mConnector.doCommand(cmd);
} catch (NativeDaemonConnectorException e) {
rc = StorageResultCode.OperationFailedInternalError;
}
if (rc == StorageResultCode.OperationSucceeded) {
synchronized (mAsecMountSet) {
mAsecMountSet.add(id);
}
}
return rc;
}
public int finalizeSecureContainer(String id) {
validatePermission(android.Manifest.permission.ASEC_CREATE);
warnOnNotMounted();
int rc = StorageResultCode.OperationSucceeded;
try {
mConnector.doCommand(String.format("asec finalize %s", id));
/*
* Finalization does a remount, so no need
* to update mAsecMountSet
*/
} catch (NativeDaemonConnectorException e) {
rc = StorageResultCode.OperationFailedInternalError;
}
return rc;
}
public int destroySecureContainer(String id, boolean force) {
validatePermission(android.Manifest.permission.ASEC_DESTROY);
waitForReady();
warnOnNotMounted();
/*
* Force a GC to make sure AssetManagers in other threads of the
* system_server are cleaned up. We have to do this since AssetManager
* instances are kept as a WeakReference and it's possible we have files
* open on the external storage.
*/
Runtime.getRuntime().gc();
int rc = StorageResultCode.OperationSucceeded;
try {
mConnector.doCommand(String.format("asec destroy %s%s", id, (force ? " force" : "")));
} catch (NativeDaemonConnectorException e) {
int code = e.getCode();
if (code == VoldResponseCode.OpFailedStorageBusy) {
rc = StorageResultCode.OperationFailedStorageBusy;
} else {
rc = StorageResultCode.OperationFailedInternalError;
}
}
if (rc == StorageResultCode.OperationSucceeded) {
synchronized (mAsecMountSet) {
if (mAsecMountSet.contains(id)) {
mAsecMountSet.remove(id);
}
}
}
return rc;
}
public int mountSecureContainer(String id, String key, int ownerUid) {
validatePermission(android.Manifest.permission.ASEC_MOUNT_UNMOUNT);
waitForReady();
warnOnNotMounted();
synchronized (mAsecMountSet) {
if (mAsecMountSet.contains(id)) {
return StorageResultCode.OperationFailedStorageMounted;
}
}
int rc = StorageResultCode.OperationSucceeded;
String cmd = String.format("asec mount %s %s %d", id, key, ownerUid);
try {
mConnector.doCommand(cmd);
} catch (NativeDaemonConnectorException e) {
int code = e.getCode();
if (code != VoldResponseCode.OpFailedStorageBusy) {
rc = StorageResultCode.OperationFailedInternalError;
}
}
if (rc == StorageResultCode.OperationSucceeded) {
synchronized (mAsecMountSet) {
mAsecMountSet.add(id);
}
}
return rc;
}
public int unmountSecureContainer(String id, boolean force) {
validatePermission(android.Manifest.permission.ASEC_MOUNT_UNMOUNT);
waitForReady();
warnOnNotMounted();
synchronized (mAsecMountSet) {
if (!mAsecMountSet.contains(id)) {
return StorageResultCode.OperationFailedStorageNotMounted;
}
}
/*
* Force a GC to make sure AssetManagers in other threads of the
* system_server are cleaned up. We have to do this since AssetManager
* instances are kept as a WeakReference and it's possible we have files
* open on the external storage.
*/
Runtime.getRuntime().gc();
int rc = StorageResultCode.OperationSucceeded;
String cmd = String.format("asec unmount %s%s", id, (force ? " force" : ""));
try {
mConnector.doCommand(cmd);
} catch (NativeDaemonConnectorException e) {
int code = e.getCode();
if (code == VoldResponseCode.OpFailedStorageBusy) {
rc = StorageResultCode.OperationFailedStorageBusy;
} else {
rc = StorageResultCode.OperationFailedInternalError;
}
}
if (rc == StorageResultCode.OperationSucceeded) {
synchronized (mAsecMountSet) {
mAsecMountSet.remove(id);
}
}
return rc;
}
public boolean isSecureContainerMounted(String id) {
validatePermission(android.Manifest.permission.ASEC_ACCESS);
waitForReady();
warnOnNotMounted();
synchronized (mAsecMountSet) {
return mAsecMountSet.contains(id);
}
}
public int renameSecureContainer(String oldId, String newId) {
validatePermission(android.Manifest.permission.ASEC_RENAME);
waitForReady();
warnOnNotMounted();
synchronized (mAsecMountSet) {
/*
* Because a mounted container has active internal state which cannot be
* changed while active, we must ensure both ids are not currently mounted.
*/
if (mAsecMountSet.contains(oldId) || mAsecMountSet.contains(newId)) {
return StorageResultCode.OperationFailedStorageMounted;
}
}
int rc = StorageResultCode.OperationSucceeded;
String cmd = String.format("asec rename %s %s", oldId, newId);
try {
mConnector.doCommand(cmd);
} catch (NativeDaemonConnectorException e) {
rc = StorageResultCode.OperationFailedInternalError;
}
return rc;
}
public String getSecureContainerPath(String id) {
validatePermission(android.Manifest.permission.ASEC_ACCESS);
waitForReady();
warnOnNotMounted();
try {
ArrayList<String> rsp = mConnector.doCommand(String.format("asec path %s", id));
String []tok = rsp.get(0).split(" ");
int code = Integer.parseInt(tok[0]);
if (code != VoldResponseCode.AsecPathResult) {
throw new IllegalStateException(String.format("Unexpected response code %d", code));
}
return tok[1];
} catch (NativeDaemonConnectorException e) {
int code = e.getCode();
if (code == VoldResponseCode.OpFailedStorageNotFound) {
throw new IllegalArgumentException(String.format("Container '%s' not found", id));
} else {
throw new IllegalStateException(String.format("Unexpected response code %d", code));
}
}
}
public void finishMediaUpdate() {
mHandler.sendEmptyMessage(H_UNMOUNT_PM_DONE);
}
private boolean isUidOwnerOfPackageOrSystem(String packageName, int callerUid) {
if (callerUid == android.os.Process.SYSTEM_UID) {
return true;
}
if (packageName == null) {
return false;
}
final int packageUid = mPms.getPackageUid(packageName);
if (DEBUG_OBB) {
Slog.d(TAG, "packageName = " + packageName + ", packageUid = " +
packageUid + ", callerUid = " + callerUid);
}
return callerUid == packageUid;
}
public String getMountedObbPath(String filename) {
if (filename == null) {
throw new IllegalArgumentException("filename cannot be null");
}
waitForReady();
warnOnNotMounted();
try {
ArrayList<String> rsp = mConnector.doCommand(String.format("obb path %s", filename));
String []tok = rsp.get(0).split(" ");
int code = Integer.parseInt(tok[0]);
if (code != VoldResponseCode.AsecPathResult) {
throw new IllegalStateException(String.format("Unexpected response code %d", code));
}
return tok[1];
} catch (NativeDaemonConnectorException e) {
int code = e.getCode();
if (code == VoldResponseCode.OpFailedStorageNotFound) {
return null;
} else {
throw new IllegalStateException(String.format("Unexpected response code %d", code));
}
}
}
public boolean isObbMounted(String filename) {
if (filename == null) {
throw new IllegalArgumentException("filename cannot be null");
}
synchronized (mObbMounts) {
return mObbPathToStateMap.containsKey(filename);
}
}
public void mountObb(String filename, String key, IObbActionListener token, int nonce)
throws RemoteException {
if (filename == null) {
throw new IllegalArgumentException("filename cannot be null");
}
if (token == null) {
throw new IllegalArgumentException("token cannot be null");
}
final int callerUid = Binder.getCallingUid();
final ObbState obbState = new ObbState(filename, callerUid, token, nonce);
final ObbAction action = new MountObbAction(obbState, key);
mObbActionHandler.sendMessage(mObbActionHandler.obtainMessage(OBB_RUN_ACTION, action));
if (DEBUG_OBB)
Slog.i(TAG, "Send to OBB handler: " + action.toString());
}
public void unmountObb(String filename, boolean force, IObbActionListener token, int nonce)
throws RemoteException {
if (filename == null) {
throw new IllegalArgumentException("filename cannot be null");
}
final int callerUid = Binder.getCallingUid();
final ObbState obbState = new ObbState(filename, callerUid, token, nonce);
final ObbAction action = new UnmountObbAction(obbState, force);
mObbActionHandler.sendMessage(mObbActionHandler.obtainMessage(OBB_RUN_ACTION, action));
if (DEBUG_OBB)
Slog.i(TAG, "Send to OBB handler: " + action.toString());
}
private void addObbStateLocked(ObbState obbState) throws RemoteException {
final IBinder binder = obbState.getBinder();
List<ObbState> obbStates = mObbMounts.get(binder);
if (obbStates == null) {
obbStates = new ArrayList<ObbState>();
mObbMounts.put(binder, obbStates);
} else {
for (final ObbState o : obbStates) {
if (o.filename.equals(obbState.filename)) {
throw new IllegalStateException("Attempt to add ObbState twice. "
+ "This indicates an error in the MountService logic.");
}
}
}
obbStates.add(obbState);
try {
obbState.link();
} catch (RemoteException e) {
/*
* The binder died before we could link it, so clean up our state
* and return failure.
*/
obbStates.remove(obbState);
if (obbStates.isEmpty()) {
mObbMounts.remove(binder);
}
// Rethrow the error so mountObb can get it
throw e;
}
mObbPathToStateMap.put(obbState.filename, obbState);
}
private void removeObbStateLocked(ObbState obbState) {
final IBinder binder = obbState.getBinder();
final List<ObbState> obbStates = mObbMounts.get(binder);
if (obbStates != null) {
if (obbStates.remove(obbState)) {
obbState.unlink();
}
if (obbStates.isEmpty()) {
mObbMounts.remove(binder);
}
}
mObbPathToStateMap.remove(obbState.filename);
}
private class ObbActionHandler extends Handler {
private boolean mBound = false;
private final List<ObbAction> mActions = new LinkedList<ObbAction>();
ObbActionHandler(Looper l) {
super(l);
}
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case OBB_RUN_ACTION: {
final ObbAction action = (ObbAction) msg.obj;
if (DEBUG_OBB)
Slog.i(TAG, "OBB_RUN_ACTION: " + action.toString());
// If a bind was already initiated we don't really
// need to do anything. The pending install
// will be processed later on.
if (!mBound) {
// If this is the only one pending we might
// have to bind to the service again.
if (!connectToService()) {
Slog.e(TAG, "Failed to bind to media container service");
action.handleError();
return;
}
}
mActions.add(action);
break;
}
case OBB_MCS_BOUND: {
if (DEBUG_OBB)
Slog.i(TAG, "OBB_MCS_BOUND");
if (msg.obj != null) {
mContainerService = (IMediaContainerService) msg.obj;
}
if (mContainerService == null) {
// Something seriously wrong. Bail out
Slog.e(TAG, "Cannot bind to media container service");
for (ObbAction action : mActions) {
// Indicate service bind error
action.handleError();
}
mActions.clear();
} else if (mActions.size() > 0) {
final ObbAction action = mActions.get(0);
if (action != null) {
action.execute(this);
}
} else {
// Should never happen ideally.
Slog.w(TAG, "Empty queue");
}
break;
}
case OBB_MCS_RECONNECT: {
if (DEBUG_OBB)
Slog.i(TAG, "OBB_MCS_RECONNECT");
if (mActions.size() > 0) {
if (mBound) {
disconnectService();
}
if (!connectToService()) {
Slog.e(TAG, "Failed to bind to media container service");
for (ObbAction action : mActions) {
// Indicate service bind error
action.handleError();
}
mActions.clear();
}
}
break;
}
case OBB_MCS_UNBIND: {
if (DEBUG_OBB)
Slog.i(TAG, "OBB_MCS_UNBIND");
// Delete pending install
if (mActions.size() > 0) {
mActions.remove(0);
}
if (mActions.size() == 0) {
if (mBound) {
disconnectService();
}
} else {
// There are more pending requests in queue.
// Just post MCS_BOUND message to trigger processing
// of next pending install.
mObbActionHandler.sendEmptyMessage(OBB_MCS_BOUND);
}
break;
}
case OBB_FLUSH_MOUNT_STATE: {
final String path = (String) msg.obj;
if (DEBUG_OBB)
Slog.i(TAG, "Flushing all OBB state for path " + path);
synchronized (mObbMounts) {
final List<ObbState> obbStatesToRemove = new LinkedList<ObbState>();
final Iterator<Entry<String, ObbState>> i =
mObbPathToStateMap.entrySet().iterator();
while (i.hasNext()) {
final Entry<String, ObbState> obbEntry = i.next();
/*
* If this entry's source file is in the volume path
* that got unmounted, remove it because it's no
* longer valid.
*/
if (obbEntry.getKey().startsWith(path)) {
obbStatesToRemove.add(obbEntry.getValue());
}
}
for (final ObbState obbState : obbStatesToRemove) {
if (DEBUG_OBB)
Slog.i(TAG, "Removing state for " + obbState.filename);
removeObbStateLocked(obbState);
try {
obbState.token.onObbResult(obbState.filename, obbState.nonce,
OnObbStateChangeListener.UNMOUNTED);
} catch (RemoteException e) {
Slog.i(TAG, "Couldn't send unmount notification for OBB: "
+ obbState.filename);
}
}
}
break;
}
}
}
private boolean connectToService() {
if (DEBUG_OBB)
Slog.i(TAG, "Trying to bind to DefaultContainerService");
Intent service = new Intent().setComponent(DEFAULT_CONTAINER_COMPONENT);
if (mContext.bindService(service, mDefContainerConn, Context.BIND_AUTO_CREATE)) {
mBound = true;
return true;
}
return false;
}
private void disconnectService() {
mContainerService = null;
mBound = false;
mContext.unbindService(mDefContainerConn);
}
}
abstract class ObbAction {
private static final int MAX_RETRIES = 3;
private int mRetries;
ObbState mObbState;
ObbAction(ObbState obbState) {
mObbState = obbState;
}
public void execute(ObbActionHandler handler) {
try {
if (DEBUG_OBB)
Slog.i(TAG, "Starting to execute action: " + this.toString());
mRetries++;
if (mRetries > MAX_RETRIES) {
Slog.w(TAG, "Failed to invoke remote methods on default container service. Giving up");
mObbActionHandler.sendEmptyMessage(OBB_MCS_UNBIND);
handleError();
return;
} else {
handleExecute();
if (DEBUG_OBB)
Slog.i(TAG, "Posting install MCS_UNBIND");
mObbActionHandler.sendEmptyMessage(OBB_MCS_UNBIND);
}
} catch (RemoteException e) {
if (DEBUG_OBB)
Slog.i(TAG, "Posting install MCS_RECONNECT");
mObbActionHandler.sendEmptyMessage(OBB_MCS_RECONNECT);
} catch (Exception e) {
if (DEBUG_OBB)
Slog.d(TAG, "Error handling OBB action", e);
handleError();
mObbActionHandler.sendEmptyMessage(OBB_MCS_UNBIND);
}
}
abstract void handleExecute() throws RemoteException, IOException;
abstract void handleError();
protected ObbInfo getObbInfo() throws IOException {
ObbInfo obbInfo;
try {
obbInfo = mContainerService.getObbInfo(mObbState.filename);
} catch (RemoteException e) {
Slog.d(TAG, "Couldn't call DefaultContainerService to fetch OBB info for "
+ mObbState.filename);
obbInfo = null;
}
if (obbInfo == null) {
throw new IOException("Couldn't read OBB file: " + mObbState.filename);
}
return obbInfo;
}
protected void sendNewStatusOrIgnore(int status) {
if (mObbState == null || mObbState.token == null) {
return;
}
try {
mObbState.token.onObbResult(mObbState.filename, mObbState.nonce, status);
} catch (RemoteException e) {
Slog.w(TAG, "MountServiceListener went away while calling onObbStateChanged");
}
}
}
class MountObbAction extends ObbAction {
private String mKey;
MountObbAction(ObbState obbState, String key) {
super(obbState);
mKey = key;
}
public void handleExecute() throws IOException, RemoteException {
waitForReady();
warnOnNotMounted();
final ObbInfo obbInfo = getObbInfo();
if (!isUidOwnerOfPackageOrSystem(obbInfo.packageName, mObbState.callerUid)) {
Slog.w(TAG, "Denied attempt to mount OBB " + obbInfo.filename
+ " which is owned by " + obbInfo.packageName);
sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_PERMISSION_DENIED);
return;
}
final boolean isMounted;
synchronized (mObbMounts) {
isMounted = mObbPathToStateMap.containsKey(obbInfo.filename);
}
if (isMounted) {
Slog.w(TAG, "Attempt to mount OBB which is already mounted: " + obbInfo.filename);
sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_ALREADY_MOUNTED);
return;
}
/*
* The filename passed in might not be the canonical name, so just
* set the filename to the canonicalized version.
*/
mObbState.filename = obbInfo.filename;
final String hashedKey;
if (mKey == null) {
hashedKey = "none";
} else {
try {
SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
KeySpec ks = new PBEKeySpec(mKey.toCharArray(), obbInfo.salt,
PBKDF2_HASH_ROUNDS, CRYPTO_ALGORITHM_KEY_SIZE);
SecretKey key = factory.generateSecret(ks);
BigInteger bi = new BigInteger(key.getEncoded());
hashedKey = bi.toString(16);
} catch (NoSuchAlgorithmException e) {
Slog.e(TAG, "Could not load PBKDF2 algorithm", e);
sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_INTERNAL);
return;
} catch (InvalidKeySpecException e) {
Slog.e(TAG, "Invalid key spec when loading PBKDF2 algorithm", e);
sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_INTERNAL);
return;
}
}
int rc = StorageResultCode.OperationSucceeded;
String cmd = String.format("obb mount %s %s %d", mObbState.filename, hashedKey,
mObbState.callerUid);
try {
mConnector.doCommand(cmd);
} catch (NativeDaemonConnectorException e) {
int code = e.getCode();
if (code != VoldResponseCode.OpFailedStorageBusy) {
rc = StorageResultCode.OperationFailedInternalError;
}
}
if (rc == StorageResultCode.OperationSucceeded) {
if (DEBUG_OBB)
Slog.d(TAG, "Successfully mounted OBB " + mObbState.filename);
synchronized (mObbMounts) {
addObbStateLocked(mObbState);
}
sendNewStatusOrIgnore(OnObbStateChangeListener.MOUNTED);
} else {
Slog.e(TAG, "Couldn't mount OBB file: " + rc);
sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_COULD_NOT_MOUNT);
}
}
public void handleError() {
sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_INTERNAL);
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("MountObbAction{");
sb.append("filename=");
sb.append(mObbState.filename);
sb.append(",callerUid=");
sb.append(mObbState.callerUid);
sb.append(",token=");
sb.append(mObbState.token != null ? mObbState.token.toString() : "NULL");
sb.append(",binder=");
sb.append(mObbState.token != null ? mObbState.getBinder().toString() : "null");
sb.append('}');
return sb.toString();
}
}
class UnmountObbAction extends ObbAction {
private boolean mForceUnmount;
UnmountObbAction(ObbState obbState, boolean force) {
super(obbState);
mForceUnmount = force;
}
public void handleExecute() throws IOException {
waitForReady();
warnOnNotMounted();
final ObbInfo obbInfo = getObbInfo();
final ObbState obbState;
synchronized (mObbMounts) {
obbState = mObbPathToStateMap.get(obbInfo.filename);
}
if (obbState == null) {
sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_NOT_MOUNTED);
return;
}
if (obbState.callerUid != mObbState.callerUid) {
Slog.w(TAG, "Permission denied attempting to unmount OBB " + obbInfo.filename
+ " (owned by " + obbInfo.packageName + ")");
sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_PERMISSION_DENIED);
return;
}
mObbState.filename = obbInfo.filename;
int rc = StorageResultCode.OperationSucceeded;
String cmd = String.format("obb unmount %s%s", mObbState.filename,
(mForceUnmount ? " force" : ""));
try {
mConnector.doCommand(cmd);
} catch (NativeDaemonConnectorException e) {
int code = e.getCode();
if (code == VoldResponseCode.OpFailedStorageBusy) {
rc = StorageResultCode.OperationFailedStorageBusy;
} else if (code == VoldResponseCode.OpFailedStorageNotFound) {
// If it's not mounted then we've already won.
rc = StorageResultCode.OperationSucceeded;
} else {
rc = StorageResultCode.OperationFailedInternalError;
}
}
if (rc == StorageResultCode.OperationSucceeded) {
synchronized (mObbMounts) {
removeObbStateLocked(obbState);
}
sendNewStatusOrIgnore(OnObbStateChangeListener.UNMOUNTED);
} else {
Slog.w(TAG, "Could not mount OBB: " + mObbState.filename);
sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_COULD_NOT_UNMOUNT);
}
}
public void handleError() {
sendNewStatusOrIgnore(OnObbStateChangeListener.ERROR_INTERNAL);
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("UnmountObbAction{");
sb.append("filename=");
sb.append(mObbState.filename != null ? mObbState.filename : "null");
sb.append(",force=");
sb.append(mForceUnmount);
sb.append(",callerUid=");
sb.append(mObbState.callerUid);
sb.append(",token=");
sb.append(mObbState.token != null ? mObbState.token.toString() : "null");
sb.append(",binder=");
sb.append(mObbState.token != null ? mObbState.getBinder().toString() : "null");
sb.append('}');
return sb.toString();
}
}
@Override
protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) != PackageManager.PERMISSION_GRANTED) {
pw.println("Permission Denial: can't dump ActivityManager from from pid="
+ Binder.getCallingPid() + ", uid=" + Binder.getCallingUid()
+ " without permission " + android.Manifest.permission.DUMP);
return;
}
synchronized (mObbMounts) {
pw.println(" mObbMounts:");
final Iterator<Entry<IBinder, List<ObbState>>> binders = mObbMounts.entrySet().iterator();
while (binders.hasNext()) {
Entry<IBinder, List<ObbState>> e = binders.next();
pw.print(" Key="); pw.println(e.getKey().toString());
final List<ObbState> obbStates = e.getValue();
for (final ObbState obbState : obbStates) {
pw.print(" "); pw.println(obbState.toString());
}
}
pw.println("");
pw.println(" mObbPathToStateMap:");
final Iterator<Entry<String, ObbState>> maps = mObbPathToStateMap.entrySet().iterator();
while (maps.hasNext()) {
final Entry<String, ObbState> e = maps.next();
pw.print(" "); pw.print(e.getKey());
pw.print(" -> "); pw.println(e.getValue().toString());
}
}
}
}
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