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Store all permissions per-user.

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By putting install permissions into all users when reading the old
USER_ALL state, and writing them back as how we have been writing
per-user permissions.

We are allowing roles to control signature permissions, however roles
are per-user while previously only one install permission state is
stored for all users, so we should make all permissions stored
per-user.

This change keeps reusing the old persistence mechanism, and the
alternative would be creating a new persistence inside
PermissionManagerService. However, since permission isn't getting
modularized in S, that would mean yet another form of persistence we
need to migrate from and another system API to support it, so I don't
think it's a good trade-off. Meanwhile, even if we manage to create
such a new persistence for per-user permission state, we are still
stuck with the legacy persistence for permission definitions inside
package (writeLegacyPermissionsTEMP) and thus still won't be in a
totally clean state. And to migrate that as well, we need yet another
storage class, system API and future migration path, without much
benefits from doing it besides legacy code looking better, so I
believe this change is the better approach to address our problem.

Once we modularized permission, we will be able to get rid of the
writeLegacyPermissionStateTEMP() methods.

Since we are no longer writing install permissions with package, we no
longer need to write permission state back to PackageSetting before
Settings.writeLPr().

The dumpsys output is maintained to be the same as before, where the
install permissions section will print the install permission state for
user 0.

Bug: 158736025
Test: presubmit
Change-Id: I8ebfb9acd354ad906490f3bb2fb9c962bc1c16eb
This commit is contained in:
Hai Zhang
2021-01-19 12:01:42 -08:00
parent 91464139ff
commit 9ec7f95b3c
6 changed files with 79 additions and 120 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
services/core/java/com/android/server/pm/PackageManagerService.java
View File

@@ -21423,7 +21423,7 @@ public class PackageManagerService extends IPackageManager.Stub
mPermissionManager.onPackageInstalled(pkg,
PermissionManagerServiceInternal.PackageInstalledParams.DEFAULT, userId);
if (applyUserRestrictions) {
mSettings.writeRuntimePermissionsForUserLPr(userId, false);
mSettings.writePermissionStateForUserLPr(userId, false);
}
}
@@ -27429,7 +27429,7 @@ public class PackageManagerService extends IPackageManager.Stub
public void writePermissionSettings(int[] userIds, boolean async) {
synchronized (mLock) {
for (int userId : userIds) {
mSettings.writeRuntimePermissionsForUserLPr(userId, !async);
mSettings.writePermissionStateForUserLPr(userId, !async);
}
}
}
@@ -28069,13 +28069,12 @@ public class PackageManagerService extends IPackageManager.Stub
/**
* Temporary method that wraps mSettings.writeLPr() and calls mPermissionManager's
* writeLegacyPermissionsTEMP() and writeLegacyPermissionStateTEMP() beforehand.
* writeLegacyPermissionsTEMP() beforehand.
*
* TODO(zhanghai): This should be removed once we finish migration of permission storage.
*/
private void writeSettingsLPrTEMP() {
mPermissionManager.writeLegacyPermissionsTEMP(mSettings.mPermissions);
mPermissionManager.writeLegacyPermissionStateTEMP();
mSettings.writeLPr();
}

2
services/core/java/com/android/server/pm/PackageSetting.java
View File

@@ -356,7 +356,7 @@ public class PackageSetting extends PackageSettingBase {
proto.write(PackageProto.UserPermissionsProto.ID, user.id);
runtimePermissionStates = dataProvider.getLegacyPermissionState(appId)
.getRuntimePermissionStates(user.id);
.getPermissionStates(user.id);
for (LegacyPermissionState.PermissionState permission : runtimePermissionStates) {
if (permission.isGranted()) {
proto.write(PackageProto.UserPermissionsProto.GRANTED_PERMISSIONS,

108
services/core/java/com/android/server/pm/Settings.java
View File

@@ -2313,7 +2313,8 @@ public final class Settings implements Watchable, Snappable {
}
void readInstallPermissionsLPr(TypedXmlPullParser parser,
LegacyPermissionState permissionsState) throws IOException, XmlPullParserException {
LegacyPermissionState permissionsState, List<UserInfo> users)
throws IOException, XmlPullParserException {
int outerDepth = parser.getDepth();
int type;
while ((type=parser.next()) != XmlPullParser.END_DOCUMENT
@@ -2328,8 +2329,10 @@ public final class Settings implements Watchable, Snappable {
String name = parser.getAttributeValue(null, ATTR_NAME);
final boolean granted = parser.getAttributeBoolean(null, ATTR_GRANTED, true);
final int flags = parser.getAttributeIntHex(null, ATTR_FLAGS, 0);
permissionsState.putInstallPermissionState(new PermissionState(name, granted,
flags));
for (final UserInfo user : users) {
permissionsState.putPermissionState(new PermissionState(name, false, granted,
flags), user.id);
}
} else {
Slog.w(PackageManagerService.TAG, "Unknown element under <permissions>: "
+ parser.getName());
@@ -2338,25 +2341,6 @@ public final class Settings implements Watchable, Snappable {
}
}
void writePermissionsLPr(TypedXmlSerializer serializer, Collection<PermissionState> permissionStates)
throws IOException {
if (permissionStates.isEmpty()) {
return;
}
serializer.startTag(null, TAG_PERMISSIONS);
for (PermissionState permissionState : permissionStates) {
serializer.startTag(null, TAG_ITEM);
serializer.attributeInterned(null, ATTR_NAME, permissionState.getName());
serializer.attributeBoolean(null, ATTR_GRANTED, permissionState.isGranted());
serializer.attributeIntHex(null, ATTR_FLAGS, permissionState.getFlags());
serializer.endTag(null, TAG_ITEM);
}
serializer.endTag(null, TAG_PERMISSIONS);
}
void readUsesStaticLibLPw(TypedXmlPullParser parser, PackageSetting outPs)
throws IOException, XmlPullParserException {
String libName = parser.getAttributeValue(null, ATTR_NAME);
@@ -2572,8 +2556,6 @@ public final class Settings implements Watchable, Snappable {
serializer.attribute(null, ATTR_NAME, usr.name);
serializer.attributeInt(null, "userId", usr.userId);
usr.signatures.writeXml(serializer, "sigs", mPastSignatures);
writePermissionsLPr(serializer, usr.getLegacyPermissionState()
.getInstallPermissionStates());
serializer.endTag(null, "shared-user");
}
@@ -2898,12 +2880,6 @@ public final class Settings implements Watchable, Snappable {
writeUsesStaticLibLPw(serializer, pkg.usesStaticLibraries, pkg.usesStaticLibrariesVersions);
// If this is a shared user, the permissions will be written there.
if (pkg.sharedUser == null) {
writePermissionsLPr(serializer, pkg.getLegacyPermissionState()
.getInstallPermissionStates());
}
serializer.endTag(null, "updated-package");
}
@@ -2991,9 +2967,6 @@ public final class Settings implements Watchable, Snappable {
serializer, "install-initiator-sigs", mPastSignatures);
}
writePermissionsLPr(serializer,
pkg.getLegacyPermissionState().getInstallPermissionStates());
writeSigningKeySetLPr(serializer, pkg.keySetData);
writeUpgradeKeySetsLPr(serializer, pkg.keySetData);
writeKeySetAliasesLPr(serializer, pkg.keySetData);
@@ -3097,13 +3070,13 @@ public final class Settings implements Watchable, Snappable {
String tagName = parser.getName();
if (tagName.equals("package")) {
readPackageLPw(parser);
readPackageLPw(parser, users);
} else if (tagName.equals("permissions")) {
mPermissions.readPermissions(parser);
} else if (tagName.equals("permission-trees")) {
mPermissions.readPermissionTrees(parser);
} else if (tagName.equals("shared-user")) {
readSharedUserLPw(parser);
readSharedUserLPw(parser, users);
} else if (tagName.equals("preferred-packages")) {
// no longer used.
} else if (tagName.equals("preferred-activities")) {
@@ -3121,7 +3094,7 @@ public final class Settings implements Watchable, Snappable {
} else if (tagName.equals(TAG_DEFAULT_BROWSER)) {
readDefaultAppsLPw(parser, 0);
} else if (tagName.equals("updated-package")) {
readDisabledSysPackageLPw(parser);
readDisabledSysPackageLPw(parser, users);
} else if (tagName.equals("renamed-package")) {
String nname = parser.getAttributeValue(null, "new");
String oname = parser.getAttributeValue(null, "old");
@@ -3627,7 +3600,7 @@ public final class Settings implements Watchable, Snappable {
}
}
private void readDisabledSysPackageLPw(TypedXmlPullParser parser)
private void readDisabledSysPackageLPw(TypedXmlPullParser parser, List<UserInfo> users)
throws XmlPullParserException, IOException {
String name = parser.getAttributeValue(null, ATTR_NAME);
String realName = parser.getAttributeValue(null, "realName");
@@ -3676,7 +3649,7 @@ public final class Settings implements Watchable, Snappable {
}
if (parser.getName().equals(TAG_PERMISSIONS)) {
readInstallPermissionsLPr(parser, ps.getLegacyPermissionState());
readInstallPermissionsLPr(parser, ps.getLegacyPermissionState(), users);
} else if (parser.getName().equals(TAG_USES_STATIC_LIB)) {
readUsesStaticLibLPw(parser, ps);
} else {
@@ -3693,7 +3666,7 @@ public final class Settings implements Watchable, Snappable {
private static int PRE_M_APP_INFO_FLAG_CANT_SAVE_STATE = 1<<28;
private static int PRE_M_APP_INFO_FLAG_PRIVILEGED = 1<<30;
private void readPackageLPw(TypedXmlPullParser parser)
private void readPackageLPw(TypedXmlPullParser parser, List<UserInfo> users)
throws XmlPullParserException, IOException {
String name = null;
String realName = null;
@@ -3935,7 +3908,7 @@ public final class Settings implements Watchable, Snappable {
packageSetting.signatures.readXml(parser, mPastSignatures);
} else if (tagName.equals(TAG_PERMISSIONS)) {
readInstallPermissionsLPr(parser,
packageSetting.getLegacyPermissionState());
packageSetting.getLegacyPermissionState(), users);
packageSetting.installPermissionsFixed = true;
} else if (tagName.equals("proper-signing-keyset")) {
long id = parser.getAttributeLong(null, "identifier");
@@ -4112,7 +4085,7 @@ public final class Settings implements Watchable, Snappable {
}
}
private void readSharedUserLPw(TypedXmlPullParser parser)
private void readSharedUserLPw(TypedXmlPullParser parser, List<UserInfo> users)
throws XmlPullParserException, IOException {
String name = null;
int pkgFlags = 0;
@@ -4156,7 +4129,7 @@ public final class Settings implements Watchable, Snappable {
if (tagName.equals("sigs")) {
su.signatures.readXml(parser, mPastSignatures);
} else if (tagName.equals("perms")) {
readInstallPermissionsLPr(parser, su.getLegacyPermissionState());
readInstallPermissionsLPr(parser, su.getLegacyPermissionState(), users);
} else {
PackageManagerService.reportSettingsProblem(Log.WARN,
"Unknown element under <shared-user>: " + parser.getName());
@@ -4979,7 +4952,7 @@ public final class Settings implements Watchable, Snappable {
dumpGidsLPr(pw, prefix + " ", mPermissionDataProvider.getGidsForUid(
UserHandle.getUid(user.id, ps.appId)));
dumpRuntimePermissionsLPr(pw, prefix + " ", permissionNames, permissionsState
.getRuntimePermissionStates(user.id), dumpAll);
.getPermissionStates(user.id), dumpAll);
}
String harmfulAppWarning = ps.getHarmfulAppWarning(user.id);
@@ -5154,7 +5127,7 @@ public final class Settings implements Watchable, Snappable {
final int[] gids = mPermissionDataProvider.getGidsForUid(UserHandle.getUid(
userId, su.userId));
final Collection<PermissionState> permissions =
permissionsState.getRuntimePermissionStates(userId);
permissionsState.getPermissionStates(userId);
if (!ArrayUtils.isEmpty(gids) || !permissions.isEmpty()) {
pw.print(prefix); pw.print("User "); pw.print(userId); pw.println(": ");
dumpGidsLPr(pw, prefix + " ", gids);
@@ -5215,9 +5188,19 @@ public final class Settings implements Watchable, Snappable {
void dumpRuntimePermissionsLPr(PrintWriter pw, String prefix, ArraySet<String> permissionNames,
Collection<PermissionState> permissionStates, boolean dumpAll) {
if (!permissionStates.isEmpty() || dumpAll) {
boolean hasRuntimePermissions = false;
for (PermissionState permissionState : permissionStates) {
if (permissionState.isRuntime()) {
hasRuntimePermissions = true;
break;
}
}
if (hasRuntimePermissions || dumpAll) {
pw.print(prefix); pw.println("runtime permissions:");
for (PermissionState permissionState : permissionStates) {
if (!permissionState.isRuntime()) {
continue;
}
if (permissionNames != null
&& !permissionNames.contains(permissionState.getName())) {
continue;
@@ -5256,11 +5239,21 @@ public final class Settings implements Watchable, Snappable {
void dumpInstallPermissionsLPr(PrintWriter pw, String prefix, ArraySet<String> permissionNames,
LegacyPermissionState permissionsState) {
Collection<PermissionState> permissionStates =
permissionsState.getInstallPermissionStates();
if (!permissionStates.isEmpty()) {
Collection<PermissionState> permissionStates = permissionsState.getPermissionStates(
UserHandle.USER_SYSTEM);
boolean hasInstallPermissions = false;
for (PermissionState permissionState : permissionStates) {
if (!permissionState.isRuntime()) {
hasInstallPermissions = true;
break;
}
}
if (hasInstallPermissions) {
pw.print(prefix); pw.println("install permissions:");
for (PermissionState permissionState : permissionStates) {
if (permissionState.isRuntime()) {
continue;
}
if (permissionNames != null
&& !permissionNames.contains(permissionState.getName())) {
continue;
@@ -5295,7 +5288,7 @@ public final class Settings implements Watchable, Snappable {
}
}
public void writeRuntimePermissionsForUserLPr(int userId, boolean sync) {
public void writePermissionStateForUserLPr(int userId, boolean sync) {
if (sync) {
mRuntimePermissionsPersistence.writeStateForUserSyncLPr(userId);
} else {
@@ -5530,7 +5523,7 @@ public final class Settings implements Watchable, Snappable {
private List<RuntimePermissionsState.PermissionState> getPermissionsFromPermissionsState(
@NonNull LegacyPermissionState permissionsState, @UserIdInt int userId) {
Collection<PermissionState> permissionStates =
permissionsState.getRuntimePermissionStates(userId);
permissionsState.getPermissionStates(userId);
List<RuntimePermissionsState.PermissionState> permissions = new ArrayList<>();
for (PermissionState permissionState : permissionStates) {
RuntimePermissionsState.PermissionState permission =
@@ -5590,6 +5583,7 @@ public final class Settings implements Watchable, Snappable {
if (permissions != null) {
readPermissionsStateLpr(permissions, packageSetting.getLegacyPermissionState(),
userId);
packageSetting.installPermissionsFixed = true;
} else if (packageSetting.sharedUser == null && !isUpgradeToR) {
Slog.w(TAG, "Missing permission state for package: " + packageName);
packageSetting.getLegacyPermissionState().setMissing(true, userId);
@@ -5624,7 +5618,7 @@ public final class Settings implements Watchable, Snappable {
String name = permission.getName();
boolean granted = permission.isGranted();
int flags = permission.getFlags();
permissionsState.putRuntimePermissionState(new PermissionState(name, granted,
permissionsState.putPermissionState(new PermissionState(name, true, granted,
flags), userId);
}
}
@@ -5646,7 +5640,7 @@ public final class Settings implements Watchable, Snappable {
try {
final TypedXmlPullParser parser = Xml.resolvePullParser(in);
parseRuntimePermissionsLPr(parser, userId);
parseLegacyRuntimePermissionsLPr(parser, userId);
} catch (XmlPullParserException | IOException e) {
throw new IllegalStateException("Failed parsing permissions file: "
@@ -5659,7 +5653,7 @@ public final class Settings implements Watchable, Snappable {
// Private internals
@GuardedBy("Settings.this.mLock")
private void parseRuntimePermissionsLPr(TypedXmlPullParser parser, int userId)
private void parseLegacyRuntimePermissionsLPr(TypedXmlPullParser parser, int userId)
throws IOException, XmlPullParserException {
final int outerDepth = parser.getDepth();
int type;
@@ -5687,7 +5681,7 @@ public final class Settings implements Watchable, Snappable {
XmlUtils.skipCurrentTag(parser);
continue;
}
parsePermissionsLPr(parser, ps.getLegacyPermissionState(), userId);
parseLegacyPermissionsLPr(parser, ps.getLegacyPermissionState(), userId);
} break;
case TAG_SHARED_USER: {
@@ -5698,13 +5692,13 @@ public final class Settings implements Watchable, Snappable {
XmlUtils.skipCurrentTag(parser);
continue;
}
parsePermissionsLPr(parser, sus.getLegacyPermissionState(), userId);
parseLegacyPermissionsLPr(parser, sus.getLegacyPermissionState(), userId);
} break;
}
}
}
private void parsePermissionsLPr(TypedXmlPullParser parser,
private void parseLegacyPermissionsLPr(TypedXmlPullParser parser,
LegacyPermissionState permissionsState, int userId)
throws IOException, XmlPullParserException {
final int outerDepth = parser.getDepth();
@@ -5722,7 +5716,7 @@ public final class Settings implements Watchable, Snappable {
parser.getAttributeBoolean(null, ATTR_GRANTED, true);
final int flags =
parser.getAttributeIntHex(null, ATTR_FLAGS, 0);
permissionsState.putRuntimePermissionState(new PermissionState(name,
permissionsState.putPermissionState(new PermissionState(name, true,
granted, flags), userId);
}
break;

52
services/core/java/com/android/server/pm/permission/LegacyPermissionState.java
View File

@@ -19,7 +19,6 @@ package com.android.server.pm.permission;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.annotation.UserIdInt;
import android.os.UserHandle;
import android.util.ArrayMap;
import android.util.SparseArray;
import android.util.SparseBooleanArray;
@@ -105,28 +104,14 @@ public final class LegacyPermissionState {
}
/**
* Put a install permission state.
*
* @param permissionState the permission state
*/
public void putInstallPermissionState(@NonNull PermissionState permissionState) {
putPermissionState(permissionState, UserHandle.USER_ALL);
}
/**
* Put a runtime permission state for a user.
* Put a permission state for a user.
*
* @param permissionState the permission state
* @param userId the user ID
*/
public void putRuntimePermissionState(@NonNull PermissionState permissionState,
public void putPermissionState(@NonNull PermissionState permissionState,
@UserIdInt int userId) {
checkUserId(userId);
putPermissionState(permissionState, userId);
}
private void putPermissionState(@NonNull PermissionState permissionState,
@UserIdInt int userId) {
UserState userState = mUserStates.get(userId);
if (userState == null) {
userState = new UserState();
@@ -156,16 +141,6 @@ public final class LegacyPermissionState {
return false;
}
/**
* Get all the install permission states.
*
* @return the install permission states
*/
@NonNull
public Collection<PermissionState> getInstallPermissionStates() {
return getPermissionStates(UserHandle.USER_ALL);
}
/**
* Get all the runtime permission states for a user.
*
@@ -173,13 +148,8 @@ public final class LegacyPermissionState {
* @return the runtime permission states
*/
@NonNull
public Collection<PermissionState> getRuntimePermissionStates(@UserIdInt int userId) {
public Collection<PermissionState> getPermissionStates(@UserIdInt int userId) {
checkUserId(userId);
return getPermissionStates(userId);
}
@NonNull
private Collection<PermissionState> getPermissionStates(@UserIdInt int userId) {
final UserState userState = mUserStates.get(userId);
if (userState == null) {
return Collections.emptyList();
@@ -265,6 +235,8 @@ public final class LegacyPermissionState {
@NonNull
private final String mName;
private final boolean mRuntime;
private final boolean mGranted;
private final int mFlags;
@@ -273,17 +245,20 @@ public final class LegacyPermissionState {
* Create a new instance of this class.
*
* @param name the name of the permission
* @param runtime whether the permission is runtime
* @param granted whether the permission is granted
* @param flags the permission flags
*/
public PermissionState(@NonNull String name, boolean granted, int flags) {
public PermissionState(@NonNull String name, boolean runtime, boolean granted, int flags) {
mName = name;
mRuntime = runtime;
mGranted = granted;
mFlags = flags;
}
private PermissionState(@NonNull PermissionState other) {
mName = other.mName;
mRuntime = other.mRuntime;
mGranted = other.mGranted;
mFlags = other.mFlags;
}
@@ -298,6 +273,15 @@ public final class LegacyPermissionState {
return mName;
}
/**
* Get whether the permission is a runtime permission.
*
* @return whether the permission is a runtime permission.
*/
public boolean isRuntime() {
return mRuntime;
}
/**
* Get whether the permission is granted.
*

21
services/core/java/com/android/server/pm/permission/PermissionManagerService.java
View File

@@ -3965,8 +3965,7 @@ public class PermissionManagerService extends IPermissionManager.Stub {
if (!usedPermissions.contains(permissionState.getName())) {
Permission bp = mRegistry.getPermission(permissionState.getName());
if (bp != null) {
if (uidState.removePermissionState(bp.getName())
&& permissionState.isRuntime()) {
if (uidState.removePermissionState(bp.getName()) && bp.isRuntime()) {
runtimePermissionChanged = true;
}
}
@@ -4573,9 +4572,7 @@ public class PermissionManagerService extends IPermissionManager.Stub {
uidState.reset();
uidState.setMissing(legacyState.isMissing(userId));
readLegacyPermissionStatesLocked(uidState,
legacyState.getInstallPermissionStates());
readLegacyPermissionStatesLocked(uidState,
legacyState.getRuntimePermissionStates(userId));
legacyState.getPermissionStates(userId));
}
}
});
@@ -4634,12 +4631,9 @@ public class PermissionManagerService extends IPermissionManager.Stub {
final LegacyPermissionState.PermissionState legacyPermissionState =
new LegacyPermissionState.PermissionState(permissionState.getName(),
permissionState.getPermission().isRuntime(),
permissionState.isGranted(), permissionState.getFlags());
if (permissionState.isRuntime()) {
legacyState.putRuntimePermissionState(legacyPermissionState, userId);
} else {
legacyState.putInstallPermissionState(legacyPermissionState);
}
legacyState.putPermissionState(legacyPermissionState, userId);
}
}
}
@@ -4904,12 +4898,9 @@ public class PermissionManagerService extends IPermissionManager.Stub {
final LegacyPermissionState.PermissionState legacyPermissionState =
new LegacyPermissionState.PermissionState(permissionState.getName(),
permissionState.getPermission().isRuntime(),
permissionState.isGranted(), permissionState.getFlags());
if (permissionState.isRuntime()) {
legacyState.putRuntimePermissionState(legacyPermissionState, userId);
} else if (userId == UserHandle.USER_SYSTEM) {
legacyState.putInstallPermissionState(legacyPermissionState);
}
legacyState.putPermissionState(legacyPermissionState, userId);
}
}
}

9
services/core/java/com/android/server/pm/permission/PermissionState.java
View File

@@ -31,9 +31,6 @@ public final class PermissionState {
private final Object mLock = new Object();
@GuardedBy("mLock")
private boolean mRuntime;
@GuardedBy("mLock")
private boolean mGranted;
@@ -66,12 +63,6 @@ public final class PermissionState {
return mPermission.computeGids(userId);
}
public boolean isRuntime() {
synchronized (mLock) {
return mPermission.isRuntime();
}
}
public boolean isGranted() {
synchronized (mLock) {
return mGranted;