1 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 //
5
6 #include "chrome/browser/sync/engine/verify_updates_command.h"
7
8 #include "chrome/browser/sync/engine/syncer.h"
9 #include "chrome/browser/sync/engine/syncer_proto_util.h"
10 #include "chrome/browser/sync/engine/syncer_types.h"
11 #include "chrome/browser/sync/engine/syncer_util.h"
12 #include "chrome/browser/sync/engine/syncproto.h"
13 #include "chrome/browser/sync/protocol/bookmark_specifics.pb.h"
14 #include "chrome/browser/sync/syncable/directory_manager.h"
15 #include "chrome/browser/sync/syncable/syncable.h"
16
17 namespace browser_sync {
18
19 using syncable::ScopedDirLookup;
20 using syncable::SyncName;
21 using syncable::WriteTransaction;
22
23 using syncable::GET_BY_ID;
24 using syncable::SYNCER;
25
VerifyUpdatesCommand()26 VerifyUpdatesCommand::VerifyUpdatesCommand() {}
~VerifyUpdatesCommand()27 VerifyUpdatesCommand::~VerifyUpdatesCommand() {}
28
ModelChangingExecuteImpl(sessions::SyncSession * session)29 void VerifyUpdatesCommand::ModelChangingExecuteImpl(
30 sessions::SyncSession* session) {
31 VLOG(1) << "Beginning Update Verification";
32 ScopedDirLookup dir(session->context()->directory_manager(),
33 session->context()->account_name());
34 if (!dir.good()) {
35 LOG(ERROR) << "Scoped dir lookup failed!";
36 return;
37 }
38 WriteTransaction trans(dir, SYNCER, __FILE__, __LINE__);
39 sessions::StatusController* status = session->status_controller();
40 const GetUpdatesResponse& updates = status->updates_response().get_updates();
41 int update_count = updates.entries().size();
42
43 VLOG(1) << update_count << " entries to verify";
44 for (int i = 0; i < update_count; i++) {
45 const SyncEntity& update =
46 *reinterpret_cast<const SyncEntity *>(&(updates.entries(i)));
47 ModelSafeGroup g = GetGroupForModelType(update.GetModelType(),
48 session->routing_info());
49 if (g != status->group_restriction())
50 continue;
51
52 VerifyUpdateResult result = VerifyUpdate(&trans, update,
53 session->routing_info());
54 status->mutable_update_progress()->AddVerifyResult(result.value, update);
55 status->increment_num_updates_downloaded_by(1);
56 if (update.deleted())
57 status->increment_num_tombstone_updates_downloaded_by(1);
58 }
59 }
60
61 namespace {
62 // In the event that IDs match, but tags differ AttemptReuniteClient tag
63 // will have refused to unify the update.
64 // We should not attempt to apply it at all since it violates consistency
65 // rules.
VerifyTagConsistency(const SyncEntity & entry,const syncable::MutableEntry & same_id)66 VerifyResult VerifyTagConsistency(const SyncEntity& entry,
67 const syncable::MutableEntry& same_id) {
68 if (entry.has_client_defined_unique_tag() &&
69 entry.client_defined_unique_tag() !=
70 same_id.Get(syncable::UNIQUE_CLIENT_TAG)) {
71 return VERIFY_FAIL;
72 }
73 return VERIFY_UNDECIDED;
74 }
75 } // namespace
76
VerifyUpdate(syncable::WriteTransaction * trans,const SyncEntity & entry,const ModelSafeRoutingInfo & routes)77 VerifyUpdatesCommand::VerifyUpdateResult VerifyUpdatesCommand::VerifyUpdate(
78 syncable::WriteTransaction* trans, const SyncEntity& entry,
79 const ModelSafeRoutingInfo& routes) {
80 syncable::Id id = entry.id();
81 VerifyUpdateResult result = {VERIFY_FAIL, GROUP_PASSIVE};
82
83 const bool deleted = entry.has_deleted() && entry.deleted();
84 const bool is_directory = entry.IsFolder();
85 const syncable::ModelType model_type = entry.GetModelType();
86
87 if (!id.ServerKnows()) {
88 LOG(ERROR) << "Illegal negative id in received updates";
89 return result;
90 }
91 {
92 const std::string name = SyncerProtoUtil::NameFromSyncEntity(entry);
93 if (name.empty() && !deleted) {
94 LOG(ERROR) << "Zero length name in non-deleted update";
95 return result;
96 }
97 }
98
99 syncable::MutableEntry same_id(trans, GET_BY_ID, id);
100 result.value = SyncerUtil::VerifyNewEntry(entry, &same_id, deleted);
101
102 syncable::ModelType placement_type = !deleted ? entry.GetModelType()
103 : same_id.good() ? same_id.GetModelType() : syncable::UNSPECIFIED;
104 result.placement = GetGroupForModelType(placement_type, routes);
105
106 if (VERIFY_UNDECIDED == result.value) {
107 result.value = VerifyTagConsistency(entry, same_id);
108 }
109
110 if (VERIFY_UNDECIDED == result.value) {
111 if (deleted)
112 result.value = VERIFY_SUCCESS;
113 }
114
115 // If we have an existing entry, we check here for updates that break
116 // consistency rules.
117 if (VERIFY_UNDECIDED == result.value) {
118 result.value = SyncerUtil::VerifyUpdateConsistency(trans, entry, &same_id,
119 deleted, is_directory, model_type);
120 }
121
122 if (VERIFY_UNDECIDED == result.value)
123 result.value = VERIFY_SUCCESS; // No news is good news.
124
125 return result; // This might be VERIFY_SUCCESS as well
126 }
127
128 } // namespace browser_sync
129