Java程序
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1311行
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51.19 KB
/*
* 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.server.am.ActivityManagerService;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.storage.IMountService;
import android.os.storage.IMountServiceListener;
import android.os.storage.IMountShutdownObserver;
import android.os.storage.StorageResultCode;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Looper;
import android.os.Message;
import android.os.RemoteException;
import android.os.IBinder;
import android.os.Environment;
import android.os.ServiceManager;
import android.os.SystemClock;
import android.os.SystemProperties;
import android.util.Slog;
import java.util.ArrayList;
import java.util.HashSet;
/**
* 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 String TAG = "MountService";
/*
* 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 hash of currently mounted secure containers.
* Used as a lock in methods to manipulate secure containers.
*/
final private HashSet<String> mAsecMountSet = new HashSet<String>();
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 {
String path;
int retries;
boolean force;
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 {
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;
}
// Update state on PackageManager
if (Environment.MEDIA_UNMOUNTED.equals(state)) {
mPms.updateExternalMediaStatus(false, false);
} else if (Environment.MEDIA_MOUNTED.equals(state)) {
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) {
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 = mConnector.doCommand("share status " + method);
for (String line : rsp) {
String []tok = line.split(" ");
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;
}
// 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 = mConnector.doCommand(cmd);
for (String line : rsp) {
String []tok = line.split(" ");
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) {
if (tok[2].equals("enabled"))
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 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 && getVolumeState(path).equals(Environment.MEDIA_SHARED)) {
/*
* USB mass storage disconnected while enabled
*/
new Thread() {
public void run() {
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());
/*
* 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;
}
mConnector = new NativeDaemonConnector(this, "vold", 10, "VoldConnector");
mReady = false;
Thread thread = new Thread(mConnector, NativeDaemonConnector.class.getName());
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));
}
}
private boolean getUmsEnabling() {
synchronized (mListeners) {
return mUmsEnabling;
}
}
private void setUmsEnabling(boolean enable) {
synchronized (mListeners) {
mUmsEnabling = true;
}
}
public boolean isUsbMassStorageConnected() {
waitForReady();
if (getUmsEnabling()) {
return true;
}
return doGetShareMethodAvailable("ums");
}
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
*/
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();
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;
}
}
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);
}
}