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Merge "Add error handling and other improvements to Bugreporting API" am: cefdee8540 am: 98e6b6bb58

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am: d77536e116

Change-Id: I8fc19c7c7c1f08e93b48b4456ec5041f41045f5f
This commit is contained in:
Nandana Dutt
2019-02-05 06:26:30 -08:00
committed by android-build-merger
parent 660ad90de3 d77536e116
commit 7c9863e4be
2 changed files with 118 additions and 39 deletions
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18
core/java/android/os/BugreportManager.java
View File

@@ -24,7 +24,8 @@ import android.annotation.RequiresPermission;
import android.annotation.SystemApi;
import android.annotation.SystemService;
import android.content.Context;
import android.os.IBinder.DeathRecipient;
import com.android.internal.util.Preconditions;
import java.io.FileDescriptor;
import java.lang.annotation.Retention;
@@ -127,13 +128,16 @@ public class BugreportManager {
@NonNull BugreportParams params,
@NonNull @CallbackExecutor Executor executor,
@NonNull BugreportCallback callback) {
// TODO(b/111441001): Enforce android.Manifest.permission.DUMP if necessary.
Preconditions.checkNotNull(bugreportFd);
Preconditions.checkNotNull(params);
Preconditions.checkNotNull(executor);
Preconditions.checkNotNull(callback);
DumpstateListener dsListener = new DumpstateListener(executor, callback);
try {
// Note: mBinder can get callingUid from the binder transaction.
mBinder.startBugreport(-1 /* callingUid */,
mContext.getOpPackageName(),
(bugreportFd != null ? bugreportFd.getFileDescriptor() : new FileDescriptor()),
bugreportFd.getFileDescriptor(),
(screenshotFd != null
? screenshotFd.getFileDescriptor() : new FileDescriptor()),
params.getMode(), dsListener);
@@ -154,8 +158,7 @@ public class BugreportManager {
}
}
private final class DumpstateListener extends IDumpstateListener.Stub
implements DeathRecipient {
private final class DumpstateListener extends IDumpstateListener.Stub {
private final Executor mExecutor;
private final BugreportCallback mCallback;
@@ -164,11 +167,6 @@ public class BugreportManager {
mCallback = callback;
}
@Override
public void binderDied() {
// TODO(b/111441001): implement
}
@Override
public void onProgress(int progress) throws RemoteException {
final long identity = Binder.clearCallingIdentity();

139
services/core/java/com/android/server/os/BugreportManagerServiceImpl.java
View File

@@ -17,8 +17,10 @@
package com.android.server.os;
import android.annotation.RequiresPermission;
import android.app.ActivityManager;
import android.app.AppOpsManager;
import android.content.Context;
import android.content.pm.UserInfo;
import android.os.Binder;
import android.os.BugreportParams;
import android.os.IDumpstate;
@@ -28,26 +30,29 @@ import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.SystemClock;
import android.os.SystemProperties;
import android.os.UserManager;
import android.util.Slog;
import com.android.internal.annotations.GuardedBy;
import com.android.internal.util.Preconditions;
import java.io.FileDescriptor;
// TODO(b/111441001):
// 1. Handle the case where another bugreport is in progress
// 2. Make everything threadsafe
// 3. Pass validation & other errors on listener
// Intercept onFinished() & implement death recipient here and shutdown
// bugreportd service.
/**
* Implementation of the service that provides a privileged API to capture and consume bugreports.
*
* <p>Delegates the actualy generation to a native implementation of {@code Dumpstate}.
* <p>Delegates the actualy generation to a native implementation of {@code IDumpstate}.
*/
class BugreportManagerServiceImpl extends IDumpstate.Stub {
private static final String TAG = "BugreportManagerService";
private static final String BUGREPORT_SERVICE = "bugreportd";
private static final long DEFAULT_BUGREPORT_SERVICE_TIMEOUT_MILLIS = 30 * 1000;
private IDumpstate mDs = null;
private final Object mLock = new Object();
private final Context mContext;
private final AppOpsManager mAppOps;
@@ -59,43 +64,44 @@ class BugreportManagerServiceImpl extends IDumpstate.Stub {
@Override
@RequiresPermission(android.Manifest.permission.DUMP)
public IDumpstateToken setListener(String name, IDumpstateListener listener,
boolean getSectionDetails) throws RemoteException {
// TODO(b/111441001): Figure out if lazy setting of listener should be allowed
// and if so how to handle it.
boolean getSectionDetails) {
throw new UnsupportedOperationException("setListener is not allowed on this service");
}
// TODO(b/111441001): Intercept onFinished here in system server and shutdown
// the bugreportd service.
@Override
@RequiresPermission(android.Manifest.permission.DUMP)
public void startBugreport(int callingUidUnused, String callingPackage,
FileDescriptor bugreportFd, FileDescriptor screenshotFd,
int bugreportMode, IDumpstateListener listener) throws RemoteException {
int callingUid = Binder.getCallingUid();
// TODO(b/111441001): validate all arguments & ensure primary user
validate(bugreportMode);
int bugreportMode, IDumpstateListener listener) {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DUMP, "startBugreport");
Preconditions.checkNotNull(callingPackage);
Preconditions.checkNotNull(bugreportFd);
Preconditions.checkNotNull(listener);
validateBugreportMode(bugreportMode);
ensureIsPrimaryUser();
int callingUid = Binder.getCallingUid();
mAppOps.checkPackage(callingUid, callingPackage);
mDs = getDumpstateService();
if (mDs == null) {
Slog.w(TAG, "Unable to get bugreport service");
// TODO(b/111441001): pass error on listener
return;
synchronized (mLock) {
startBugreportLocked(callingUid, callingPackage, bugreportFd, screenshotFd,
bugreportMode, listener);
}
mDs.startBugreport(callingUid, callingPackage,
bugreportFd, screenshotFd, bugreportMode, listener);
}
@Override
@RequiresPermission(android.Manifest.permission.DUMP)
public void cancelBugreport() throws RemoteException {
// This tells init to cancel bugreportd service.
SystemProperties.set("ctl.stop", BUGREPORT_SERVICE);
mDs = null;
public void cancelBugreport() {
mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DUMP, "startBugreport");
// This tells init to cancel bugreportd service. Note that this is achieved through setting
// a system property which is not thread-safe. So the lock here offers thread-safety only
// among callers of the API.
synchronized (mLock) {
SystemProperties.set("ctl.stop", BUGREPORT_SERVICE);
}
}
private boolean validate(@BugreportParams.BugreportMode int mode) {
private void validateBugreportMode(@BugreportParams.BugreportMode int mode) {
if (mode != BugreportParams.BUGREPORT_MODE_FULL
&& mode != BugreportParams.BUGREPORT_MODE_INTERACTIVE
&& mode != BugreportParams.BUGREPORT_MODE_REMOTE
@@ -103,9 +109,66 @@ class BugreportManagerServiceImpl extends IDumpstate.Stub {
&& mode != BugreportParams.BUGREPORT_MODE_TELEPHONY
&& mode != BugreportParams.BUGREPORT_MODE_WIFI) {
Slog.w(TAG, "Unknown bugreport mode: " + mode);
return false;
throw new IllegalArgumentException("Unknown bugreport mode: " + mode);
}
return true;
}
/**
* Validates that the current user is the primary user.
*
* @throws IllegalArgumentException if the current user is not the primary user
*/
private void ensureIsPrimaryUser() {
UserInfo currentUser = null;
try {
currentUser = ActivityManager.getService().getCurrentUser();
} catch (RemoteException e) {
// Impossible to get RemoteException for an in-process call.
}
UserInfo primaryUser = UserManager.get(mContext).getPrimaryUser();
if (currentUser == null) {
logAndThrow("No current user. Only primary user is allowed to take bugreports.");
}
if (primaryUser == null) {
logAndThrow("No primary user. Only primary user is allowed to take bugreports.");
}
if (primaryUser.id != currentUser.id) {
logAndThrow("Current user not primary user. Only primary user"
+ " is allowed to take bugreports.");
}
}
@GuardedBy("mLock")
private void startBugreportLocked(int callingUid, String callingPackage,
FileDescriptor bugreportFd, FileDescriptor screenshotFd,
int bugreportMode, IDumpstateListener listener) {
if (isDumpstateBinderServiceRunningLocked()) {
Slog.w(TAG, "'dumpstate' is already running. Cannot start a new bugreport"
+ " while another one is currently in progress.");
// TODO(b/111441001): Use a new error code; add this to the documentation of the API.
reportError(listener, IDumpstateListener.BUGREPORT_ERROR_RUNTIME_ERROR);
return;
}
IDumpstate ds = startAndGetDumpstateBinderServiceLocked();
if (ds == null) {
Slog.w(TAG, "Unable to get bugreport service");
reportError(listener, IDumpstateListener.BUGREPORT_ERROR_RUNTIME_ERROR);
return;
}
try {
ds.startBugreport(callingUid, callingPackage,
bugreportFd, screenshotFd, bugreportMode, listener);
} catch (RemoteException e) {
reportError(listener, IDumpstateListener.BUGREPORT_ERROR_RUNTIME_ERROR);
}
}
@GuardedBy("mLock")
private boolean isDumpstateBinderServiceRunningLocked() {
IDumpstate ds = IDumpstate.Stub.asInterface(ServiceManager.getService("dumpstate"));
return ds != null;
}
/*
@@ -115,8 +178,12 @@ class BugreportManagerServiceImpl extends IDumpstate.Stub {
* <p>Generating bugreports requires root privileges. To limit the footprint
* of the root access, the actual generation in Dumpstate binary is accessed as a
* oneshot service 'bugreport'.
*
* <p>Note that starting the service is achieved through setting a system property, which is
* not thread-safe. So the lock here offers thread-safety only among callers of the API.
*/
private IDumpstate getDumpstateService() {
@GuardedBy("mLock")
private IDumpstate startAndGetDumpstateBinderServiceLocked() {
// Start bugreport service.
SystemProperties.set("ctl.start", BUGREPORT_SERVICE);
@@ -145,4 +212,18 @@ class BugreportManagerServiceImpl extends IDumpstate.Stub {
}
return ds;
}
private void reportError(IDumpstateListener listener, int errorCode) {
try {
listener.onError(errorCode);
} catch (RemoteException e) {
// Something went wrong in binder or app process. There's nothing to do here.
Slog.w(TAG, "onError() transaction threw RemoteException: " + e.getMessage());
}
}
private void logAndThrow(String message) {
Slog.w(TAG, message);
throw new IllegalArgumentException(message);
}
}