| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chrome/browser/sync/glue/generic_change_processor.h" |
| |
| #include "base/location.h" |
| #include "base/strings/string_number_conversions.h" |
| #include "base/strings/utf_string_conversions.h" |
| #include "content/public/browser/browser_thread.h" |
| #include "sync/api/sync_change.h" |
| #include "sync/api/sync_error.h" |
| #include "sync/api/syncable_service.h" |
| #include "sync/internal_api/public/base_node.h" |
| #include "sync/internal_api/public/change_record.h" |
| #include "sync/internal_api/public/read_node.h" |
| #include "sync/internal_api/public/read_transaction.h" |
| #include "sync/internal_api/public/util/unrecoverable_error_handler.h" |
| #include "sync/internal_api/public/write_node.h" |
| #include "sync/internal_api/public/write_transaction.h" |
| #include "sync/syncable/entry.h" // TODO(tim): Bug 123674. |
| |
| using content::BrowserThread; |
| |
| namespace browser_sync { |
| |
| namespace { |
| |
| void SetNodeSpecifics(const sync_pb::EntitySpecifics& entity_specifics, |
| syncer::WriteNode* write_node) { |
| if (syncer::GetModelTypeFromSpecifics(entity_specifics) == |
| syncer::PASSWORDS) { |
| write_node->SetPasswordSpecifics( |
| entity_specifics.password().client_only_encrypted_data()); |
| } else { |
| write_node->SetEntitySpecifics(entity_specifics); |
| } |
| } |
| |
| syncer::SyncData BuildRemoteSyncData( |
| int64 sync_id, |
| const syncer::BaseNode& read_node) { |
| // Use the specifics of non-password datatypes directly (encryption has |
| // already been handled). |
| if (read_node.GetModelType() != syncer::PASSWORDS) { |
| return syncer::SyncData::CreateRemoteData(sync_id, |
| read_node.GetEntitySpecifics(), |
| read_node.GetModificationTime()); |
| } |
| |
| // Passwords must be accessed differently, to account for their encryption, |
| // and stored into a temporary EntitySpecifics. |
| sync_pb::EntitySpecifics password_holder; |
| password_holder.mutable_password()->mutable_client_only_encrypted_data()-> |
| CopyFrom(read_node.GetPasswordSpecifics()); |
| return syncer::SyncData::CreateRemoteData(sync_id, |
| password_holder, |
| read_node.GetModificationTime()); |
| } |
| |
| } // namespace |
| |
| GenericChangeProcessor::GenericChangeProcessor( |
| DataTypeErrorHandler* error_handler, |
| const base::WeakPtr<syncer::SyncableService>& local_service, |
| const base::WeakPtr<syncer::SyncMergeResult>& merge_result, |
| syncer::UserShare* user_share) |
| : ChangeProcessor(error_handler), |
| local_service_(local_service), |
| merge_result_(merge_result), |
| share_handle_(user_share) { |
| DCHECK(CalledOnValidThread()); |
| } |
| |
| GenericChangeProcessor::~GenericChangeProcessor() { |
| DCHECK(CalledOnValidThread()); |
| } |
| |
| void GenericChangeProcessor::ApplyChangesFromSyncModel( |
| const syncer::BaseTransaction* trans, |
| int64 model_version, |
| const syncer::ImmutableChangeRecordList& changes) { |
| DCHECK(CalledOnValidThread()); |
| DCHECK(syncer_changes_.empty()); |
| for (syncer::ChangeRecordList::const_iterator it = |
| changes.Get().begin(); it != changes.Get().end(); ++it) { |
| if (it->action == syncer::ChangeRecord::ACTION_DELETE) { |
| syncer_changes_.push_back( |
| syncer::SyncChange( |
| FROM_HERE, |
| syncer::SyncChange::ACTION_DELETE, |
| syncer::SyncData::CreateRemoteData( |
| it->id, it->specifics, base::Time()))); |
| } else { |
| syncer::SyncChange::SyncChangeType action = |
| (it->action == syncer::ChangeRecord::ACTION_ADD) ? |
| syncer::SyncChange::ACTION_ADD : syncer::SyncChange::ACTION_UPDATE; |
| // Need to load specifics from node. |
| syncer::ReadNode read_node(trans); |
| if (read_node.InitByIdLookup(it->id) != syncer::BaseNode::INIT_OK) { |
| error_handler()->OnSingleDatatypeUnrecoverableError( |
| FROM_HERE, |
| "Failed to look up data for received change with id " + |
| base::Int64ToString(it->id)); |
| return; |
| } |
| syncer_changes_.push_back( |
| syncer::SyncChange( |
| FROM_HERE, |
| action, |
| BuildRemoteSyncData(it->id, read_node))); |
| } |
| } |
| } |
| |
| void GenericChangeProcessor::CommitChangesFromSyncModel() { |
| DCHECK(CalledOnValidThread()); |
| if (syncer_changes_.empty()) |
| return; |
| if (!local_service_.get()) { |
| syncer::ModelType type = syncer_changes_[0].sync_data().GetDataType(); |
| syncer::SyncError error(FROM_HERE, |
| syncer::SyncError::DATATYPE_ERROR, |
| "Local service destroyed.", |
| type); |
| error_handler()->OnSingleDatatypeUnrecoverableError(error.location(), |
| error.message()); |
| return; |
| } |
| syncer::SyncError error = local_service_->ProcessSyncChanges(FROM_HERE, |
| syncer_changes_); |
| syncer_changes_.clear(); |
| if (error.IsSet()) { |
| error_handler()->OnSingleDatatypeUnrecoverableError( |
| error.location(), error.message()); |
| } |
| } |
| |
| syncer::SyncDataList GenericChangeProcessor::GetAllSyncData( |
| syncer::ModelType type) const { |
| // This is slow / memory intensive. Should be used sparingly by datatypes. |
| syncer::SyncDataList data; |
| GetAllSyncDataReturnError(type, &data); |
| return data; |
| } |
| |
| syncer::SyncError GenericChangeProcessor::GetAllSyncDataReturnError( |
| syncer::ModelType type, |
| syncer::SyncDataList* current_sync_data) const { |
| DCHECK(CalledOnValidThread()); |
| std::string type_name = syncer::ModelTypeToString(type); |
| syncer::ReadTransaction trans(FROM_HERE, share_handle()); |
| syncer::ReadNode root(&trans); |
| if (root.InitByTagLookup(syncer::ModelTypeToRootTag(type)) != |
| syncer::BaseNode::INIT_OK) { |
| syncer::SyncError error(FROM_HERE, |
| syncer::SyncError::DATATYPE_ERROR, |
| "Server did not create the top-level " + type_name + |
| " node. We might be running against an out-of-" |
| "date server.", |
| type); |
| return error; |
| } |
| |
| // TODO(akalin): We'll have to do a tree traversal for bookmarks. |
| DCHECK_NE(type, syncer::BOOKMARKS); |
| |
| std::vector<int64> child_ids; |
| root.GetChildIds(&child_ids); |
| |
| for (std::vector<int64>::iterator it = child_ids.begin(); |
| it != child_ids.end(); ++it) { |
| syncer::ReadNode sync_child_node(&trans); |
| if (sync_child_node.InitByIdLookup(*it) != |
| syncer::BaseNode::INIT_OK) { |
| syncer::SyncError error(FROM_HERE, |
| syncer::SyncError::DATATYPE_ERROR, |
| "Failed to fetch child node for type " + |
| type_name + ".", |
| type); |
| return error; |
| } |
| current_sync_data->push_back(BuildRemoteSyncData(sync_child_node.GetId(), |
| sync_child_node)); |
| } |
| return syncer::SyncError(); |
| } |
| |
| int GenericChangeProcessor::GetSyncCountForType(syncer::ModelType type) { |
| syncer::ReadTransaction trans(FROM_HERE, share_handle()); |
| syncer::ReadNode root(&trans); |
| if (root.InitByTagLookup(syncer::ModelTypeToRootTag(type)) != |
| syncer::BaseNode::INIT_OK) |
| return 0; |
| |
| // Subtract one to account for type's root node. |
| return root.GetTotalNodeCount() - 1; |
| } |
| |
| namespace { |
| |
| // TODO(isherman): Investigating http://crbug.com/121592 |
| // WARNING: this code is sensitive to compiler optimizations. Be careful |
| // modifying any code around an OnSingleDatatypeUnrecoverableError call, else |
| // the compiler attempts to merge it with other calls, losing useful information |
| // in breakpad uploads. |
| syncer::SyncError LogLookupFailure( |
| syncer::BaseNode::InitByLookupResult lookup_result, |
| const tracked_objects::Location& from_here, |
| const std::string& error_prefix, |
| syncer::ModelType type, |
| DataTypeErrorHandler* error_handler) { |
| switch (lookup_result) { |
| case syncer::BaseNode::INIT_FAILED_ENTRY_NOT_GOOD: { |
| syncer::SyncError error; |
| error.Reset(from_here, |
| error_prefix + |
| "could not find entry matching the lookup criteria.", |
| type); |
| error_handler->OnSingleDatatypeUnrecoverableError(FROM_HERE, |
| error.message()); |
| LOG(ERROR) << "Delete: Bad entry."; |
| return error; |
| } |
| case syncer::BaseNode::INIT_FAILED_ENTRY_IS_DEL: { |
| syncer::SyncError error; |
| error.Reset(from_here, error_prefix + "entry is already deleted.", type); |
| error_handler->OnSingleDatatypeUnrecoverableError(FROM_HERE, |
| error.message()); |
| LOG(ERROR) << "Delete: Deleted entry."; |
| return error; |
| } |
| case syncer::BaseNode::INIT_FAILED_DECRYPT_IF_NECESSARY: { |
| syncer::SyncError error; |
| error.Reset(from_here, error_prefix + "unable to decrypt", type); |
| error_handler->OnSingleDatatypeUnrecoverableError(FROM_HERE, |
| error.message()); |
| LOG(ERROR) << "Delete: Undecryptable entry."; |
| return error; |
| } |
| case syncer::BaseNode::INIT_FAILED_PRECONDITION: { |
| syncer::SyncError error; |
| error.Reset(from_here, |
| error_prefix + "a precondition was not met for calling init.", |
| type); |
| error_handler->OnSingleDatatypeUnrecoverableError(FROM_HERE, |
| error.message()); |
| LOG(ERROR) << "Delete: Failed precondition."; |
| return error; |
| } |
| default: { |
| syncer::SyncError error; |
| // Should have listed all the possible error cases above. |
| error.Reset(from_here, error_prefix + "unknown error", type); |
| error_handler->OnSingleDatatypeUnrecoverableError(FROM_HERE, |
| error.message()); |
| LOG(ERROR) << "Delete: Unknown error."; |
| return error; |
| } |
| } |
| } |
| |
| syncer::SyncError AttemptDelete( |
| const syncer::SyncChange& change, |
| syncer::ModelType type, |
| const std::string& type_str, |
| syncer::WriteNode* node, |
| DataTypeErrorHandler* error_handler) { |
| DCHECK_EQ(change.change_type(), syncer::SyncChange::ACTION_DELETE); |
| if (change.sync_data().IsLocal()) { |
| const std::string& tag = change.sync_data().GetTag(); |
| if (tag.empty()) { |
| syncer::SyncError error( |
| FROM_HERE, |
| syncer::SyncError::DATATYPE_ERROR, |
| "Failed to delete " + type_str + " node. Local data, empty tag. " + |
| change.location().ToString(), |
| type); |
| error_handler->OnSingleDatatypeUnrecoverableError(error.location(), |
| error.message()); |
| NOTREACHED(); |
| return error; |
| } |
| |
| syncer::BaseNode::InitByLookupResult result = |
| node->InitByClientTagLookup(change.sync_data().GetDataType(), tag); |
| if (result != syncer::BaseNode::INIT_OK) { |
| return LogLookupFailure( |
| result, FROM_HERE, |
| "Failed to delete " + type_str + " node. Local data. " + |
| change.location().ToString(), |
| type, error_handler); |
| } |
| } else { |
| syncer::BaseNode::InitByLookupResult result = |
| node->InitByIdLookup(change.sync_data().GetRemoteId()); |
| if (result != syncer::BaseNode::INIT_OK) { |
| return LogLookupFailure( |
| result, FROM_HERE, |
| "Failed to delete " + type_str + " node. Non-local data. " + |
| change.location().ToString(), |
| type, error_handler); |
| } |
| } |
| if (IsActOnceDataType(type)) |
| node->Drop(); |
| else |
| node->Tombstone(); |
| return syncer::SyncError(); |
| } |
| |
| } // namespace |
| |
| // WARNING: this code is sensitive to compiler optimizations. Be careful |
| // modifying any code around an OnSingleDatatypeUnrecoverableError call, else |
| // the compiler attempts to merge it with other calls, losing useful information |
| // in breakpad uploads. |
| syncer::SyncError GenericChangeProcessor::ProcessSyncChanges( |
| const tracked_objects::Location& from_here, |
| const syncer::SyncChangeList& list_of_changes) { |
| DCHECK(CalledOnValidThread()); |
| syncer::WriteTransaction trans(from_here, share_handle()); |
| |
| for (syncer::SyncChangeList::const_iterator iter = list_of_changes.begin(); |
| iter != list_of_changes.end(); |
| ++iter) { |
| const syncer::SyncChange& change = *iter; |
| DCHECK_NE(change.sync_data().GetDataType(), syncer::UNSPECIFIED); |
| syncer::ModelType type = change.sync_data().GetDataType(); |
| std::string type_str = syncer::ModelTypeToString(type); |
| syncer::WriteNode sync_node(&trans); |
| if (change.change_type() == syncer::SyncChange::ACTION_DELETE) { |
| syncer::SyncError error = |
| AttemptDelete(change, type, type_str, &sync_node, |
| error_handler()); |
| if (error.IsSet()) { |
| NOTREACHED(); |
| return error; |
| } |
| if (merge_result_.get()) { |
| merge_result_->set_num_items_deleted( |
| merge_result_->num_items_deleted() + 1); |
| } |
| } else if (change.change_type() == syncer::SyncChange::ACTION_ADD) { |
| // TODO(sync): Handle other types of creation (custom parents, folders, |
| // etc.). |
| syncer::ReadNode root_node(&trans); |
| if (root_node.InitByTagLookup( |
| syncer::ModelTypeToRootTag(change.sync_data().GetDataType())) != |
| syncer::BaseNode::INIT_OK) { |
| syncer::SyncError error(FROM_HERE, |
| syncer::SyncError::DATATYPE_ERROR, |
| "Failed to look up root node for type " + |
| type_str, |
| type); |
| error_handler()->OnSingleDatatypeUnrecoverableError(FROM_HERE, |
| error.message()); |
| NOTREACHED(); |
| LOG(ERROR) << "Create: no root node."; |
| return error; |
| } |
| syncer::WriteNode::InitUniqueByCreationResult result = |
| sync_node.InitUniqueByCreation(change.sync_data().GetDataType(), |
| root_node, |
| change.sync_data().GetTag()); |
| if (result != syncer::WriteNode::INIT_SUCCESS) { |
| std::string error_prefix = "Failed to create " + type_str + " node: " + |
| change.location().ToString() + ", "; |
| switch (result) { |
| case syncer::WriteNode::INIT_FAILED_EMPTY_TAG: { |
| syncer::SyncError error; |
| error.Reset(FROM_HERE, error_prefix + "empty tag", type); |
| error_handler()->OnSingleDatatypeUnrecoverableError( |
| FROM_HERE, error.message()); |
| LOG(ERROR) << "Create: Empty tag."; |
| return error; |
| } |
| case syncer::WriteNode::INIT_FAILED_ENTRY_ALREADY_EXISTS: { |
| syncer::SyncError error; |
| error.Reset(FROM_HERE, error_prefix + "entry already exists", type); |
| error_handler()->OnSingleDatatypeUnrecoverableError( |
| FROM_HERE, error.message()); |
| LOG(ERROR) << "Create: Entry exists."; |
| return error; |
| } |
| case syncer::WriteNode::INIT_FAILED_COULD_NOT_CREATE_ENTRY: { |
| syncer::SyncError error; |
| error.Reset(FROM_HERE, error_prefix + "failed to create entry", |
| type); |
| error_handler()->OnSingleDatatypeUnrecoverableError( |
| FROM_HERE, error.message()); |
| LOG(ERROR) << "Create: Could not create entry."; |
| return error; |
| } |
| case syncer::WriteNode::INIT_FAILED_SET_PREDECESSOR: { |
| syncer::SyncError error; |
| error.Reset(FROM_HERE, error_prefix + "failed to set predecessor", |
| type); |
| error_handler()->OnSingleDatatypeUnrecoverableError( |
| FROM_HERE, error.message()); |
| LOG(ERROR) << "Create: Bad predecessor."; |
| return error; |
| } |
| default: { |
| syncer::SyncError error; |
| error.Reset(FROM_HERE, error_prefix + "unknown error", type); |
| error_handler()->OnSingleDatatypeUnrecoverableError( |
| FROM_HERE, error.message()); |
| LOG(ERROR) << "Create: Unknown error."; |
| return error; |
| } |
| } |
| } |
| sync_node.SetTitle(UTF8ToWide(change.sync_data().GetTitle())); |
| SetNodeSpecifics(change.sync_data().GetSpecifics(), &sync_node); |
| if (merge_result_.get()) { |
| merge_result_->set_num_items_added(merge_result_->num_items_added() + |
| 1); |
| } |
| } else if (change.change_type() == syncer::SyncChange::ACTION_UPDATE) { |
| // TODO(zea): consider having this logic for all possible changes? |
| syncer::BaseNode::InitByLookupResult result = |
| sync_node.InitByClientTagLookup(change.sync_data().GetDataType(), |
| change.sync_data().GetTag()); |
| if (result != syncer::BaseNode::INIT_OK) { |
| std::string error_prefix = "Failed to load " + type_str + " node. " + |
| change.location().ToString() + ", "; |
| if (result == syncer::BaseNode::INIT_FAILED_PRECONDITION) { |
| syncer::SyncError error; |
| error.Reset(FROM_HERE, |
| error_prefix + "empty tag", |
| type); |
| error_handler()->OnSingleDatatypeUnrecoverableError( |
| FROM_HERE, error.message()); |
| LOG(ERROR) << "Update: Empty tag."; |
| return error; |
| } else if (result == syncer::BaseNode::INIT_FAILED_ENTRY_NOT_GOOD) { |
| syncer::SyncError error; |
| error.Reset(FROM_HERE, |
| error_prefix + "bad entry", |
| type); |
| error_handler()->OnSingleDatatypeUnrecoverableError( |
| FROM_HERE, error.message()); |
| LOG(ERROR) << "Update: bad entry."; |
| return error; |
| } else if (result == syncer::BaseNode::INIT_FAILED_ENTRY_IS_DEL) { |
| syncer::SyncError error; |
| error.Reset(FROM_HERE, |
| error_prefix + "deleted entry", |
| type); |
| error_handler()->OnSingleDatatypeUnrecoverableError( |
| FROM_HERE, error.message()); |
| LOG(ERROR) << "Update: deleted entry."; |
| return error; |
| } else { |
| syncer::Cryptographer* crypto = trans.GetCryptographer(); |
| syncer::ModelTypeSet encrypted_types(trans.GetEncryptedTypes()); |
| const sync_pb::EntitySpecifics& specifics = |
| sync_node.GetEntry()->GetSpecifics(); |
| CHECK(specifics.has_encrypted()); |
| const bool can_decrypt = crypto->CanDecrypt(specifics.encrypted()); |
| const bool agreement = encrypted_types.Has(type); |
| if (!agreement && !can_decrypt) { |
| syncer::SyncError error; |
| error.Reset(FROM_HERE, |
| "Failed to load encrypted entry, missing key and " |
| "nigori mismatch for " + type_str + ".", |
| type); |
| error_handler()->OnSingleDatatypeUnrecoverableError( |
| FROM_HERE, error.message()); |
| LOG(ERROR) << "Update: encr case 1."; |
| return error; |
| } else if (agreement && can_decrypt) { |
| syncer::SyncError error; |
| error.Reset(FROM_HERE, |
| "Failed to load encrypted entry, we have the key " |
| "and the nigori matches (?!) for " + type_str + ".", |
| type); |
| error_handler()->OnSingleDatatypeUnrecoverableError( |
| FROM_HERE, error.message()); |
| LOG(ERROR) << "Update: encr case 2."; |
| return error; |
| } else if (agreement) { |
| syncer::SyncError error; |
| error.Reset(FROM_HERE, |
| "Failed to load encrypted entry, missing key and " |
| "the nigori matches for " + type_str + ".", |
| type); |
| error_handler()->OnSingleDatatypeUnrecoverableError( |
| FROM_HERE, error.message()); |
| LOG(ERROR) << "Update: encr case 3."; |
| return error; |
| } else { |
| syncer::SyncError error; |
| error.Reset(FROM_HERE, |
| "Failed to load encrypted entry, we have the key" |
| "(?!) and nigori mismatch for " + type_str + ".", |
| type); |
| error_handler()->OnSingleDatatypeUnrecoverableError( |
| FROM_HERE, error.message()); |
| LOG(ERROR) << "Update: encr case 4."; |
| return error; |
| } |
| } |
| } |
| |
| sync_node.SetTitle(UTF8ToWide(change.sync_data().GetTitle())); |
| SetNodeSpecifics(change.sync_data().GetSpecifics(), &sync_node); |
| if (merge_result_.get()) { |
| merge_result_->set_num_items_modified( |
| merge_result_->num_items_modified() + 1); |
| } |
| // TODO(sync): Support updating other parts of the sync node (title, |
| // successor, parent, etc.). |
| } else { |
| syncer::SyncError error( |
| FROM_HERE, |
| syncer::SyncError::DATATYPE_ERROR, |
| "Received unset SyncChange in the change processor, " + |
| change.location().ToString(), |
| type); |
| error_handler()->OnSingleDatatypeUnrecoverableError(FROM_HERE, |
| error.message()); |
| NOTREACHED(); |
| LOG(ERROR) << "Unset sync change."; |
| return error; |
| } |
| } |
| return syncer::SyncError(); |
| } |
| |
| bool GenericChangeProcessor::SyncModelHasUserCreatedNodes( |
| syncer::ModelType type, |
| bool* has_nodes) { |
| DCHECK(CalledOnValidThread()); |
| DCHECK(has_nodes); |
| DCHECK_NE(type, syncer::UNSPECIFIED); |
| std::string type_name = syncer::ModelTypeToString(type); |
| std::string err_str = "Server did not create the top-level " + type_name + |
| " node. We might be running against an out-of-date server."; |
| *has_nodes = false; |
| syncer::ReadTransaction trans(FROM_HERE, share_handle()); |
| syncer::ReadNode type_root_node(&trans); |
| if (type_root_node.InitByTagLookup(syncer::ModelTypeToRootTag(type)) != |
| syncer::BaseNode::INIT_OK) { |
| LOG(ERROR) << err_str; |
| return false; |
| } |
| |
| // The sync model has user created nodes if the type's root node has any |
| // children. |
| *has_nodes = type_root_node.HasChildren(); |
| return true; |
| } |
| |
| bool GenericChangeProcessor::CryptoReadyIfNecessary(syncer::ModelType type) { |
| DCHECK(CalledOnValidThread()); |
| DCHECK_NE(type, syncer::UNSPECIFIED); |
| // We only access the cryptographer while holding a transaction. |
| syncer::ReadTransaction trans(FROM_HERE, share_handle()); |
| const syncer::ModelTypeSet encrypted_types = trans.GetEncryptedTypes(); |
| return !encrypted_types.Has(type) || |
| trans.GetCryptographer()->is_ready(); |
| } |
| |
| void GenericChangeProcessor::StartImpl(Profile* profile) { |
| DCHECK(CalledOnValidThread()); |
| } |
| |
| syncer::UserShare* GenericChangeProcessor::share_handle() const { |
| DCHECK(CalledOnValidThread()); |
| return share_handle_; |
| } |
| |
| } // namespace browser_sync |
