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| 1 // Copyright (c) 2012 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 #include "webkit/fileapi/file_system_origin_database.h" | |
| 6 | |
| 7 #include <set> | |
| 8 | |
| 9 #include "base/file_util.h" | |
| 10 #include "base/format_macros.h" | |
| 11 #include "base/location.h" | |
| 12 #include "base/logging.h" | |
| 13 #include "base/metrics/histogram.h" | |
| 14 #include "base/stringprintf.h" | |
| 15 #include "base/string_util.h" | |
| 16 #include "base/strings/string_number_conversions.h" | |
| 17 #include "third_party/leveldatabase/src/include/leveldb/db.h" | |
| 18 #include "third_party/leveldatabase/src/include/leveldb/write_batch.h" | |
| 19 #include "webkit/fileapi/file_system_util.h" | |
| 20 | |
| 21 namespace { | |
| 22 | |
| 23 const base::FilePath::CharType kOriginDatabaseName[] = | |
| 24 FILE_PATH_LITERAL("Origins"); | |
| 25 const char kOriginKeyPrefix[] = "ORIGIN:"; | |
| 26 const char kLastPathKey[] = "LAST_PATH"; | |
| 27 const int64 kMinimumReportIntervalHours = 1; | |
| 28 const char kInitStatusHistogramLabel[] = "FileSystem.OriginDatabaseInit"; | |
| 29 const char kDatabaseRepairHistogramLabel[] = "FileSystem.OriginDatabaseRepair"; | |
| 30 | |
| 31 enum InitStatus { | |
| 32 INIT_STATUS_OK = 0, | |
| 33 INIT_STATUS_CORRUPTION, | |
| 34 INIT_STATUS_IO_ERROR, | |
| 35 INIT_STATUS_UNKNOWN_ERROR, | |
| 36 INIT_STATUS_MAX | |
| 37 }; | |
| 38 | |
| 39 enum RepairResult { | |
| 40 DB_REPAIR_SUCCEEDED = 0, | |
| 41 DB_REPAIR_FAILED, | |
| 42 DB_REPAIR_MAX | |
| 43 }; | |
| 44 | |
| 45 std::string OriginToOriginKey(const std::string& origin) { | |
| 46 std::string key(kOriginKeyPrefix); | |
| 47 return key + origin; | |
| 48 } | |
| 49 | |
| 50 const char* LastPathKey() { | |
| 51 return kLastPathKey; | |
| 52 } | |
| 53 | |
| 54 } // namespace | |
| 55 | |
| 56 namespace fileapi { | |
| 57 | |
| 58 FileSystemOriginDatabase::OriginRecord::OriginRecord() { | |
| 59 } | |
| 60 | |
| 61 FileSystemOriginDatabase::OriginRecord::OriginRecord( | |
| 62 const std::string& origin_in, const base::FilePath& path_in) | |
| 63 : origin(origin_in), path(path_in) { | |
| 64 } | |
| 65 | |
| 66 FileSystemOriginDatabase::OriginRecord::~OriginRecord() { | |
| 67 } | |
| 68 | |
| 69 FileSystemOriginDatabase::FileSystemOriginDatabase( | |
| 70 const base::FilePath& file_system_directory) | |
| 71 : file_system_directory_(file_system_directory) { | |
| 72 } | |
| 73 | |
| 74 FileSystemOriginDatabase::~FileSystemOriginDatabase() { | |
| 75 } | |
| 76 | |
| 77 bool FileSystemOriginDatabase::Init(RecoveryOption recovery_option) { | |
| 78 if (db_) | |
| 79 return true; | |
| 80 | |
| 81 std::string path = | |
| 82 FilePathToString(file_system_directory_.Append(kOriginDatabaseName)); | |
| 83 leveldb::Options options; | |
| 84 options.create_if_missing = true; | |
| 85 leveldb::DB* db; | |
| 86 leveldb::Status status = leveldb::DB::Open(options, path, &db); | |
| 87 ReportInitStatus(status); | |
| 88 if (status.ok()) { | |
| 89 db_.reset(db); | |
| 90 return true; | |
| 91 } | |
| 92 HandleError(FROM_HERE, status); | |
| 93 | |
| 94 // Corruption due to missing necessary MANIFEST-* file causes IOError instead | |
| 95 // of Corruption error. | |
| 96 // Try to repair database even when IOError case. | |
| 97 if (!status.IsCorruption() && !status.IsIOError()) | |
| 98 return false; | |
| 99 | |
| 100 switch (recovery_option) { | |
| 101 case FAIL_ON_CORRUPTION: | |
| 102 return false; | |
| 103 case REPAIR_ON_CORRUPTION: | |
| 104 LOG(WARNING) << "Attempting to repair FileSystemOriginDatabase."; | |
| 105 | |
| 106 if (RepairDatabase(path)) { | |
| 107 UMA_HISTOGRAM_ENUMERATION(kDatabaseRepairHistogramLabel, | |
| 108 DB_REPAIR_SUCCEEDED, DB_REPAIR_MAX); | |
| 109 LOG(WARNING) << "Repairing FileSystemOriginDatabase completed."; | |
| 110 return true; | |
| 111 } | |
| 112 UMA_HISTOGRAM_ENUMERATION(kDatabaseRepairHistogramLabel, | |
| 113 DB_REPAIR_FAILED, DB_REPAIR_MAX); | |
| 114 // fall through | |
| 115 case DELETE_ON_CORRUPTION: | |
| 116 if (!file_util::Delete(file_system_directory_, true)) | |
| 117 return false; | |
| 118 if (!file_util::CreateDirectory(file_system_directory_)) | |
| 119 return false; | |
| 120 return Init(FAIL_ON_CORRUPTION); | |
| 121 } | |
| 122 NOTREACHED(); | |
| 123 return false; | |
| 124 } | |
| 125 | |
| 126 bool FileSystemOriginDatabase::RepairDatabase(const std::string& db_path) { | |
| 127 DCHECK(!db_.get()); | |
| 128 if (!leveldb::RepairDB(db_path, leveldb::Options()).ok() || | |
| 129 !Init(FAIL_ON_CORRUPTION)) { | |
| 130 LOG(WARNING) << "Failed to repair FileSystemOriginDatabase."; | |
| 131 return false; | |
| 132 } | |
| 133 | |
| 134 // See if the repaired entries match with what we have on disk. | |
| 135 std::set<base::FilePath> directories; | |
| 136 file_util::FileEnumerator file_enum(file_system_directory_, | |
| 137 false /* recursive */, | |
| 138 file_util::FileEnumerator::DIRECTORIES); | |
| 139 base::FilePath path_each; | |
| 140 while (!(path_each = file_enum.Next()).empty()) | |
| 141 directories.insert(path_each.BaseName()); | |
| 142 std::set<base::FilePath>::iterator db_dir_itr = | |
| 143 directories.find(base::FilePath(kOriginDatabaseName)); | |
| 144 // Make sure we have the database file in its directory and therefore we are | |
| 145 // working on the correct path. | |
| 146 DCHECK(db_dir_itr != directories.end()); | |
| 147 directories.erase(db_dir_itr); | |
| 148 | |
| 149 std::vector<OriginRecord> origins; | |
| 150 if (!ListAllOrigins(&origins)) { | |
| 151 DropDatabase(); | |
| 152 return false; | |
| 153 } | |
| 154 | |
| 155 // Delete any obsolete entries from the origins database. | |
| 156 for (std::vector<OriginRecord>::iterator db_origin_itr = origins.begin(); | |
| 157 db_origin_itr != origins.end(); | |
| 158 ++db_origin_itr) { | |
| 159 std::set<base::FilePath>::iterator dir_itr = | |
| 160 directories.find(db_origin_itr->path); | |
| 161 if (dir_itr == directories.end()) { | |
| 162 if (!RemovePathForOrigin(db_origin_itr->origin)) { | |
| 163 DropDatabase(); | |
| 164 return false; | |
| 165 } | |
| 166 } else { | |
| 167 directories.erase(dir_itr); | |
| 168 } | |
| 169 } | |
| 170 | |
| 171 // Delete any directories not listed in the origins database. | |
| 172 for (std::set<base::FilePath>::iterator dir_itr = directories.begin(); | |
| 173 dir_itr != directories.end(); | |
| 174 ++dir_itr) { | |
| 175 if (!file_util::Delete(file_system_directory_.Append(*dir_itr), | |
| 176 true /* recursive */)) { | |
| 177 DropDatabase(); | |
| 178 return false; | |
| 179 } | |
| 180 } | |
| 181 | |
| 182 return true; | |
| 183 } | |
| 184 | |
| 185 void FileSystemOriginDatabase::HandleError( | |
| 186 const tracked_objects::Location& from_here, | |
| 187 const leveldb::Status& status) { | |
| 188 db_.reset(); | |
| 189 LOG(ERROR) << "FileSystemOriginDatabase failed at: " | |
| 190 << from_here.ToString() << " with error: " << status.ToString(); | |
| 191 } | |
| 192 | |
| 193 void FileSystemOriginDatabase::ReportInitStatus(const leveldb::Status& status) { | |
| 194 base::Time now = base::Time::Now(); | |
| 195 base::TimeDelta minimum_interval = | |
| 196 base::TimeDelta::FromHours(kMinimumReportIntervalHours); | |
| 197 if (last_reported_time_ + minimum_interval >= now) | |
| 198 return; | |
| 199 last_reported_time_ = now; | |
| 200 | |
| 201 if (status.ok()) { | |
| 202 UMA_HISTOGRAM_ENUMERATION(kInitStatusHistogramLabel, | |
| 203 INIT_STATUS_OK, INIT_STATUS_MAX); | |
| 204 } else if (status.IsCorruption()) { | |
| 205 UMA_HISTOGRAM_ENUMERATION(kInitStatusHistogramLabel, | |
| 206 INIT_STATUS_CORRUPTION, INIT_STATUS_MAX); | |
| 207 } else if (status.IsIOError()) { | |
| 208 UMA_HISTOGRAM_ENUMERATION(kInitStatusHistogramLabel, | |
| 209 INIT_STATUS_IO_ERROR, INIT_STATUS_MAX); | |
| 210 } else { | |
| 211 UMA_HISTOGRAM_ENUMERATION(kInitStatusHistogramLabel, | |
| 212 INIT_STATUS_UNKNOWN_ERROR, INIT_STATUS_MAX); | |
| 213 } | |
| 214 } | |
| 215 | |
| 216 bool FileSystemOriginDatabase::HasOriginPath(const std::string& origin) { | |
| 217 if (!Init(REPAIR_ON_CORRUPTION)) | |
| 218 return false; | |
| 219 if (origin.empty()) | |
| 220 return false; | |
| 221 std::string path; | |
| 222 leveldb::Status status = | |
| 223 db_->Get(leveldb::ReadOptions(), OriginToOriginKey(origin), &path); | |
| 224 if (status.ok()) | |
| 225 return true; | |
| 226 if (status.IsNotFound()) | |
| 227 return false; | |
| 228 HandleError(FROM_HERE, status); | |
| 229 return false; | |
| 230 } | |
| 231 | |
| 232 bool FileSystemOriginDatabase::GetPathForOrigin( | |
| 233 const std::string& origin, base::FilePath* directory) { | |
| 234 if (!Init(REPAIR_ON_CORRUPTION)) | |
| 235 return false; | |
| 236 DCHECK(directory); | |
| 237 if (origin.empty()) | |
| 238 return false; | |
| 239 std::string path_string; | |
| 240 std::string origin_key = OriginToOriginKey(origin); | |
| 241 leveldb::Status status = | |
| 242 db_->Get(leveldb::ReadOptions(), origin_key, &path_string); | |
| 243 if (status.IsNotFound()) { | |
| 244 int last_path_number; | |
| 245 if (!GetLastPathNumber(&last_path_number)) | |
| 246 return false; | |
| 247 path_string = base::StringPrintf("%03u", last_path_number + 1); | |
| 248 // store both back as a single transaction | |
| 249 leveldb::WriteBatch batch; | |
| 250 batch.Put(LastPathKey(), path_string); | |
| 251 batch.Put(origin_key, path_string); | |
| 252 status = db_->Write(leveldb::WriteOptions(), &batch); | |
| 253 if (!status.ok()) { | |
| 254 HandleError(FROM_HERE, status); | |
| 255 return false; | |
| 256 } | |
| 257 } | |
| 258 if (status.ok()) { | |
| 259 *directory = StringToFilePath(path_string); | |
| 260 return true; | |
| 261 } | |
| 262 HandleError(FROM_HERE, status); | |
| 263 return false; | |
| 264 } | |
| 265 | |
| 266 bool FileSystemOriginDatabase::RemovePathForOrigin(const std::string& origin) { | |
| 267 if (!Init(REPAIR_ON_CORRUPTION)) | |
| 268 return false; | |
| 269 leveldb::Status status = | |
| 270 db_->Delete(leveldb::WriteOptions(), OriginToOriginKey(origin)); | |
| 271 if (status.ok() || status.IsNotFound()) | |
| 272 return true; | |
| 273 HandleError(FROM_HERE, status); | |
| 274 return false; | |
| 275 } | |
| 276 | |
| 277 bool FileSystemOriginDatabase::ListAllOrigins( | |
| 278 std::vector<OriginRecord>* origins) { | |
| 279 if (!Init(REPAIR_ON_CORRUPTION)) | |
| 280 return false; | |
| 281 DCHECK(origins); | |
| 282 scoped_ptr<leveldb::Iterator> iter(db_->NewIterator(leveldb::ReadOptions())); | |
| 283 std::string origin_key_prefix = OriginToOriginKey(std::string()); | |
| 284 iter->Seek(origin_key_prefix); | |
| 285 origins->clear(); | |
| 286 while (iter->Valid() && | |
| 287 StartsWithASCII(iter->key().ToString(), origin_key_prefix, true)) { | |
| 288 std::string origin = | |
| 289 iter->key().ToString().substr(origin_key_prefix.length()); | |
| 290 base::FilePath path = StringToFilePath(iter->value().ToString()); | |
| 291 origins->push_back(OriginRecord(origin, path)); | |
| 292 iter->Next(); | |
| 293 } | |
| 294 return true; | |
| 295 } | |
| 296 | |
| 297 void FileSystemOriginDatabase::DropDatabase() { | |
| 298 db_.reset(); | |
| 299 } | |
| 300 | |
| 301 bool FileSystemOriginDatabase::GetLastPathNumber(int* number) { | |
| 302 if (!Init(REPAIR_ON_CORRUPTION)) | |
| 303 return false; | |
| 304 DCHECK(number); | |
| 305 std::string number_string; | |
| 306 leveldb::Status status = | |
| 307 db_->Get(leveldb::ReadOptions(), LastPathKey(), &number_string); | |
| 308 if (status.ok()) | |
| 309 return base::StringToInt(number_string, number); | |
| 310 if (!status.IsNotFound()) { | |
| 311 HandleError(FROM_HERE, status); | |
| 312 return false; | |
| 313 } | |
| 314 // Verify that this is a totally new database, and initialize it. | |
| 315 scoped_ptr<leveldb::Iterator> iter(db_->NewIterator(leveldb::ReadOptions())); | |
| 316 iter->SeekToFirst(); | |
| 317 if (iter->Valid()) { // DB was not empty, but had no last path number! | |
| 318 LOG(ERROR) << "File system origin database is corrupt!"; | |
| 319 return false; | |
| 320 } | |
| 321 // This is always the first write into the database. If we ever add a | |
| 322 // version number, they should go in in a single transaction. | |
| 323 status = | |
| 324 db_->Put(leveldb::WriteOptions(), LastPathKey(), std::string("-1")); | |
| 325 if (!status.ok()) { | |
| 326 HandleError(FROM_HERE, status); | |
| 327 return false; | |
| 328 } | |
| 329 *number = -1; | |
| 330 return true; | |
| 331 } | |
| 332 | |
| 333 } // namespace fileapi | |
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Chromium Code Reviews
Issue 14885021:
Cleanup: Prefix HTML5 Sandbox FileSystem related files with 'sandbox_' (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src