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 "storage/browser/fileapi/obfuscated_file_util.h" 6 7 #include <queue> 8 #include <string> 9 #include <vector> 10 11 #include "base/files/file_util.h" 12 #include "base/format_macros.h" 13 #include "base/logging.h" 14 #include "base/message_loop/message_loop.h" 15 #include "base/metrics/histogram.h" 16 #include "base/stl_util.h" 17 #include "base/strings/string_number_conversions.h" 18 #include "base/strings/stringprintf.h" 19 #include "base/strings/sys_string_conversions.h" 20 #include "base/strings/utf_string_conversions.h" 21 #include "base/time/time.h" 22 #include "storage/browser/fileapi/file_observers.h" 23 #include "storage/browser/fileapi/file_system_context.h" 24 #include "storage/browser/fileapi/file_system_operation_context.h" 25 #include "storage/browser/fileapi/file_system_url.h" 26 #include "storage/browser/fileapi/native_file_util.h" 27 #include "storage/browser/fileapi/sandbox_file_system_backend.h" 28 #include "storage/browser/fileapi/sandbox_isolated_origin_database.h" 29 #include "storage/browser/fileapi/sandbox_origin_database.h" 30 #include "storage/browser/fileapi/sandbox_prioritized_origin_database.h" 31 #include "storage/browser/fileapi/timed_task_helper.h" 32 #include "storage/browser/quota/quota_manager.h" 33 #include "storage/common/database/database_identifier.h" 34 #include "storage/common/fileapi/file_system_util.h" 35 #include "url/gurl.h" 36 37 // Example of various paths: 38 // void ObfuscatedFileUtil::DoSomething(const FileSystemURL& url) { 39 // base::FilePath virtual_path = url.path(); 40 // base::FilePath local_path = GetLocalFilePath(url); 41 // 42 // NativeFileUtil::DoSomething(local_path); 43 // file_util::DoAnother(local_path); 44 // } 45 46 namespace storage { 47 48 namespace { 49 50 typedef SandboxDirectoryDatabase::FileId FileId; 51 typedef SandboxDirectoryDatabase::FileInfo FileInfo; 52 53 void InitFileInfo( 54 SandboxDirectoryDatabase::FileInfo* file_info, 55 SandboxDirectoryDatabase::FileId parent_id, 56 const base::FilePath::StringType& file_name) { 57 DCHECK(file_info); 58 file_info->parent_id = parent_id; 59 file_info->name = file_name; 60 } 61 62 // Costs computed as per crbug.com/86114, based on the LevelDB implementation of 63 // path storage under Linux. It's not clear if that will differ on Windows, on 64 // which base::FilePath uses wide chars [since they're converted to UTF-8 for 65 // storage anyway], but as long as the cost is high enough that one can't cheat 66 // on quota by storing data in paths, it doesn't need to be all that accurate. 67 const int64 kPathCreationQuotaCost = 146; // Bytes per inode, basically. 68 const int64 kPathByteQuotaCost = 2; // Bytes per byte of path length in UTF-8. 69 70 int64 UsageForPath(size_t length) { 71 return kPathCreationQuotaCost + 72 static_cast<int64>(length) * kPathByteQuotaCost; 73 } 74 75 bool AllocateQuota(FileSystemOperationContext* context, int64 growth) { 76 if (context->allowed_bytes_growth() == storage::QuotaManager::kNoLimit) 77 return true; 78 79 int64 new_quota = context->allowed_bytes_growth() - growth; 80 if (growth > 0 && new_quota < 0) 81 return false; 82 context->set_allowed_bytes_growth(new_quota); 83 return true; 84 } 85 86 void UpdateUsage( 87 FileSystemOperationContext* context, 88 const FileSystemURL& url, 89 int64 growth) { 90 context->update_observers()->Notify( 91 &FileUpdateObserver::OnUpdate, MakeTuple(url, growth)); 92 } 93 94 void TouchDirectory(SandboxDirectoryDatabase* db, FileId dir_id) { 95 DCHECK(db); 96 if (!db->UpdateModificationTime(dir_id, base::Time::Now())) 97 NOTREACHED(); 98 } 99 100 enum IsolatedOriginStatus { 101 kIsolatedOriginMatch, 102 kIsolatedOriginDontMatch, 103 kIsolatedOriginStatusMax, 104 }; 105 106 } // namespace 107 108 class ObfuscatedFileEnumerator 109 : public FileSystemFileUtil::AbstractFileEnumerator { 110 public: 111 ObfuscatedFileEnumerator( 112 SandboxDirectoryDatabase* db, 113 FileSystemOperationContext* context, 114 ObfuscatedFileUtil* obfuscated_file_util, 115 const FileSystemURL& root_url, 116 bool recursive) 117 : db_(db), 118 context_(context), 119 obfuscated_file_util_(obfuscated_file_util), 120 root_url_(root_url), 121 recursive_(recursive), 122 current_file_id_(0) { 123 base::FilePath root_virtual_path = root_url.path(); 124 FileId file_id; 125 126 if (!db_->GetFileWithPath(root_virtual_path, &file_id)) 127 return; 128 129 FileRecord record = { file_id, root_virtual_path }; 130 recurse_queue_.push(record); 131 } 132 133 virtual ~ObfuscatedFileEnumerator() {} 134 135 virtual base::FilePath Next() OVERRIDE { 136 ProcessRecurseQueue(); 137 if (display_stack_.empty()) 138 return base::FilePath(); 139 140 current_file_id_ = display_stack_.back(); 141 display_stack_.pop_back(); 142 143 FileInfo file_info; 144 base::FilePath platform_file_path; 145 base::File::Error error = 146 obfuscated_file_util_->GetFileInfoInternal( 147 db_, context_, root_url_, current_file_id_, 148 &file_info, ¤t_platform_file_info_, &platform_file_path); 149 if (error != base::File::FILE_OK) 150 return Next(); 151 152 base::FilePath virtual_path = 153 current_parent_virtual_path_.Append(file_info.name); 154 if (recursive_ && file_info.is_directory()) { 155 FileRecord record = { current_file_id_, virtual_path }; 156 recurse_queue_.push(record); 157 } 158 return virtual_path; 159 } 160 161 virtual int64 Size() OVERRIDE { 162 return current_platform_file_info_.size; 163 } 164 165 virtual base::Time LastModifiedTime() OVERRIDE { 166 return current_platform_file_info_.last_modified; 167 } 168 169 virtual bool IsDirectory() OVERRIDE { 170 return current_platform_file_info_.is_directory; 171 } 172 173 private: 174 typedef SandboxDirectoryDatabase::FileId FileId; 175 typedef SandboxDirectoryDatabase::FileInfo FileInfo; 176 177 struct FileRecord { 178 FileId file_id; 179 base::FilePath virtual_path; 180 }; 181 182 void ProcessRecurseQueue() { 183 while (display_stack_.empty() && !recurse_queue_.empty()) { 184 FileRecord entry = recurse_queue_.front(); 185 recurse_queue_.pop(); 186 if (!db_->ListChildren(entry.file_id, &display_stack_)) { 187 display_stack_.clear(); 188 return; 189 } 190 current_parent_virtual_path_ = entry.virtual_path; 191 } 192 } 193 194 SandboxDirectoryDatabase* db_; 195 FileSystemOperationContext* context_; 196 ObfuscatedFileUtil* obfuscated_file_util_; 197 FileSystemURL root_url_; 198 bool recursive_; 199 200 std::queue<FileRecord> recurse_queue_; 201 std::vector<FileId> display_stack_; 202 base::FilePath current_parent_virtual_path_; 203 204 FileId current_file_id_; 205 base::File::Info current_platform_file_info_; 206 }; 207 208 class ObfuscatedOriginEnumerator 209 : public ObfuscatedFileUtil::AbstractOriginEnumerator { 210 public: 211 typedef SandboxOriginDatabase::OriginRecord OriginRecord; 212 ObfuscatedOriginEnumerator( 213 SandboxOriginDatabaseInterface* origin_database, 214 const base::FilePath& base_file_path) 215 : base_file_path_(base_file_path) { 216 if (origin_database) 217 origin_database->ListAllOrigins(&origins_); 218 } 219 220 virtual ~ObfuscatedOriginEnumerator() {} 221 222 // Returns the next origin. Returns empty if there are no more origins. 223 virtual GURL Next() OVERRIDE { 224 OriginRecord record; 225 if (!origins_.empty()) { 226 record = origins_.back(); 227 origins_.pop_back(); 228 } 229 current_ = record; 230 return storage::GetOriginFromIdentifier(record.origin); 231 } 232 233 // Returns the current origin's information. 234 virtual bool HasTypeDirectory(const std::string& type_string) const OVERRIDE { 235 if (current_.path.empty()) 236 return false; 237 if (type_string.empty()) { 238 NOTREACHED(); 239 return false; 240 } 241 base::FilePath path = 242 base_file_path_.Append(current_.path).AppendASCII(type_string); 243 return base::DirectoryExists(path); 244 } 245 246 private: 247 std::vector<OriginRecord> origins_; 248 OriginRecord current_; 249 base::FilePath base_file_path_; 250 }; 251 252 ObfuscatedFileUtil::ObfuscatedFileUtil( 253 storage::SpecialStoragePolicy* special_storage_policy, 254 const base::FilePath& file_system_directory, 255 leveldb::Env* env_override, 256 base::SequencedTaskRunner* file_task_runner, 257 const GetTypeStringForURLCallback& get_type_string_for_url, 258 const std::set<std::string>& known_type_strings, 259 SandboxFileSystemBackendDelegate* sandbox_delegate) 260 : special_storage_policy_(special_storage_policy), 261 file_system_directory_(file_system_directory), 262 env_override_(env_override), 263 db_flush_delay_seconds_(10 * 60), // 10 mins. 264 file_task_runner_(file_task_runner), 265 get_type_string_for_url_(get_type_string_for_url), 266 known_type_strings_(known_type_strings), 267 sandbox_delegate_(sandbox_delegate) { 268 } 269 270 ObfuscatedFileUtil::~ObfuscatedFileUtil() { 271 DropDatabases(); 272 } 273 274 base::File ObfuscatedFileUtil::CreateOrOpen( 275 FileSystemOperationContext* context, 276 const FileSystemURL& url, int file_flags) { 277 base::File file = CreateOrOpenInternal(context, url, file_flags); 278 if (file.IsValid() && file_flags & base::File::FLAG_WRITE && 279 context->quota_limit_type() == storage::kQuotaLimitTypeUnlimited && 280 sandbox_delegate_) { 281 sandbox_delegate_->StickyInvalidateUsageCache(url.origin(), url.type()); 282 } 283 return file.Pass(); 284 } 285 286 base::File::Error ObfuscatedFileUtil::EnsureFileExists( 287 FileSystemOperationContext* context, 288 const FileSystemURL& url, 289 bool* created) { 290 SandboxDirectoryDatabase* db = GetDirectoryDatabase(url, true); 291 if (!db) 292 return base::File::FILE_ERROR_FAILED; 293 294 FileId file_id; 295 if (db->GetFileWithPath(url.path(), &file_id)) { 296 FileInfo file_info; 297 if (!db->GetFileInfo(file_id, &file_info)) { 298 NOTREACHED(); 299 return base::File::FILE_ERROR_FAILED; 300 } 301 if (file_info.is_directory()) 302 return base::File::FILE_ERROR_NOT_A_FILE; 303 if (created) 304 *created = false; 305 return base::File::FILE_OK; 306 } 307 FileId parent_id; 308 if (!db->GetFileWithPath(VirtualPath::DirName(url.path()), &parent_id)) 309 return base::File::FILE_ERROR_NOT_FOUND; 310 311 FileInfo file_info; 312 InitFileInfo(&file_info, parent_id, 313 VirtualPath::BaseName(url.path()).value()); 314 315 int64 growth = UsageForPath(file_info.name.size()); 316 if (!AllocateQuota(context, growth)) 317 return base::File::FILE_ERROR_NO_SPACE; 318 base::File::Error error = CreateFile(context, base::FilePath(), url, 319 &file_info); 320 if (created && base::File::FILE_OK == error) { 321 *created = true; 322 UpdateUsage(context, url, growth); 323 context->change_observers()->Notify( 324 &FileChangeObserver::OnCreateFile, MakeTuple(url)); 325 } 326 return error; 327 } 328 329 base::File::Error ObfuscatedFileUtil::CreateDirectory( 330 FileSystemOperationContext* context, 331 const FileSystemURL& url, 332 bool exclusive, 333 bool recursive) { 334 SandboxDirectoryDatabase* db = GetDirectoryDatabase(url, true); 335 if (!db) 336 return base::File::FILE_ERROR_FAILED; 337 338 FileId file_id; 339 if (db->GetFileWithPath(url.path(), &file_id)) { 340 FileInfo file_info; 341 if (exclusive) 342 return base::File::FILE_ERROR_EXISTS; 343 if (!db->GetFileInfo(file_id, &file_info)) { 344 NOTREACHED(); 345 return base::File::FILE_ERROR_FAILED; 346 } 347 if (!file_info.is_directory()) 348 return base::File::FILE_ERROR_NOT_A_DIRECTORY; 349 return base::File::FILE_OK; 350 } 351 352 std::vector<base::FilePath::StringType> components; 353 VirtualPath::GetComponents(url.path(), &components); 354 FileId parent_id = 0; 355 size_t index; 356 for (index = 0; index < components.size(); ++index) { 357 base::FilePath::StringType name = components[index]; 358 if (name == FILE_PATH_LITERAL("/")) 359 continue; 360 if (!db->GetChildWithName(parent_id, name, &parent_id)) 361 break; 362 } 363 if (!db->IsDirectory(parent_id)) 364 return base::File::FILE_ERROR_NOT_A_DIRECTORY; 365 if (!recursive && components.size() - index > 1) 366 return base::File::FILE_ERROR_NOT_FOUND; 367 bool first = true; 368 for (; index < components.size(); ++index) { 369 FileInfo file_info; 370 file_info.name = components[index]; 371 if (file_info.name == FILE_PATH_LITERAL("/")) 372 continue; 373 file_info.modification_time = base::Time::Now(); 374 file_info.parent_id = parent_id; 375 int64 growth = UsageForPath(file_info.name.size()); 376 if (!AllocateQuota(context, growth)) 377 return base::File::FILE_ERROR_NO_SPACE; 378 base::File::Error error = db->AddFileInfo(file_info, &parent_id); 379 if (error != base::File::FILE_OK) 380 return error; 381 UpdateUsage(context, url, growth); 382 context->change_observers()->Notify( 383 &FileChangeObserver::OnCreateDirectory, MakeTuple(url)); 384 if (first) { 385 first = false; 386 TouchDirectory(db, file_info.parent_id); 387 } 388 } 389 return base::File::FILE_OK; 390 } 391 392 base::File::Error ObfuscatedFileUtil::GetFileInfo( 393 FileSystemOperationContext* context, 394 const FileSystemURL& url, 395 base::File::Info* file_info, 396 base::FilePath* platform_file_path) { 397 SandboxDirectoryDatabase* db = GetDirectoryDatabase(url, false); 398 if (!db) 399 return base::File::FILE_ERROR_NOT_FOUND; 400 FileId file_id; 401 if (!db->GetFileWithPath(url.path(), &file_id)) 402 return base::File::FILE_ERROR_NOT_FOUND; 403 FileInfo local_info; 404 return GetFileInfoInternal(db, context, url, 405 file_id, &local_info, 406 file_info, platform_file_path); 407 } 408 409 scoped_ptr<FileSystemFileUtil::AbstractFileEnumerator> 410 ObfuscatedFileUtil::CreateFileEnumerator( 411 FileSystemOperationContext* context, 412 const FileSystemURL& root_url) { 413 return CreateFileEnumerator(context, root_url, false /* recursive */); 414 } 415 416 base::File::Error ObfuscatedFileUtil::GetLocalFilePath( 417 FileSystemOperationContext* context, 418 const FileSystemURL& url, 419 base::FilePath* local_path) { 420 SandboxDirectoryDatabase* db = GetDirectoryDatabase(url, false); 421 if (!db) 422 return base::File::FILE_ERROR_NOT_FOUND; 423 FileId file_id; 424 if (!db->GetFileWithPath(url.path(), &file_id)) 425 return base::File::FILE_ERROR_NOT_FOUND; 426 FileInfo file_info; 427 if (!db->GetFileInfo(file_id, &file_info) || file_info.is_directory()) { 428 NOTREACHED(); 429 // Directories have no local file path. 430 return base::File::FILE_ERROR_NOT_FOUND; 431 } 432 *local_path = DataPathToLocalPath(url, file_info.data_path); 433 434 if (local_path->empty()) 435 return base::File::FILE_ERROR_NOT_FOUND; 436 return base::File::FILE_OK; 437 } 438 439 base::File::Error ObfuscatedFileUtil::Touch( 440 FileSystemOperationContext* context, 441 const FileSystemURL& url, 442 const base::Time& last_access_time, 443 const base::Time& last_modified_time) { 444 SandboxDirectoryDatabase* db = GetDirectoryDatabase(url, false); 445 if (!db) 446 return base::File::FILE_ERROR_NOT_FOUND; 447 FileId file_id; 448 if (!db->GetFileWithPath(url.path(), &file_id)) 449 return base::File::FILE_ERROR_NOT_FOUND; 450 451 FileInfo file_info; 452 if (!db->GetFileInfo(file_id, &file_info)) { 453 NOTREACHED(); 454 return base::File::FILE_ERROR_FAILED; 455 } 456 if (file_info.is_directory()) { 457 if (!db->UpdateModificationTime(file_id, last_modified_time)) 458 return base::File::FILE_ERROR_FAILED; 459 return base::File::FILE_OK; 460 } 461 return NativeFileUtil::Touch( 462 DataPathToLocalPath(url, file_info.data_path), 463 last_access_time, last_modified_time); 464 } 465 466 base::File::Error ObfuscatedFileUtil::Truncate( 467 FileSystemOperationContext* context, 468 const FileSystemURL& url, 469 int64 length) { 470 base::File::Info file_info; 471 base::FilePath local_path; 472 base::File::Error error = 473 GetFileInfo(context, url, &file_info, &local_path); 474 if (error != base::File::FILE_OK) 475 return error; 476 477 int64 growth = length - file_info.size; 478 if (!AllocateQuota(context, growth)) 479 return base::File::FILE_ERROR_NO_SPACE; 480 error = NativeFileUtil::Truncate(local_path, length); 481 if (error == base::File::FILE_OK) { 482 UpdateUsage(context, url, growth); 483 context->change_observers()->Notify( 484 &FileChangeObserver::OnModifyFile, MakeTuple(url)); 485 } 486 return error; 487 } 488 489 base::File::Error ObfuscatedFileUtil::CopyOrMoveFile( 490 FileSystemOperationContext* context, 491 const FileSystemURL& src_url, 492 const FileSystemURL& dest_url, 493 CopyOrMoveOption option, 494 bool copy) { 495 // Cross-filesystem copies and moves should be handled via CopyInForeignFile. 496 DCHECK(src_url.origin() == dest_url.origin()); 497 DCHECK(src_url.type() == dest_url.type()); 498 499 SandboxDirectoryDatabase* db = GetDirectoryDatabase(src_url, true); 500 if (!db) 501 return base::File::FILE_ERROR_FAILED; 502 503 FileId src_file_id; 504 if (!db->GetFileWithPath(src_url.path(), &src_file_id)) 505 return base::File::FILE_ERROR_NOT_FOUND; 506 507 FileId dest_file_id; 508 bool overwrite = db->GetFileWithPath(dest_url.path(), 509 &dest_file_id); 510 511 FileInfo src_file_info; 512 base::File::Info src_platform_file_info; 513 base::FilePath src_local_path; 514 base::File::Error error = GetFileInfoInternal( 515 db, context, src_url, src_file_id, 516 &src_file_info, &src_platform_file_info, &src_local_path); 517 if (error != base::File::FILE_OK) 518 return error; 519 if (src_file_info.is_directory()) 520 return base::File::FILE_ERROR_NOT_A_FILE; 521 522 FileInfo dest_file_info; 523 base::File::Info dest_platform_file_info; // overwrite case only 524 base::FilePath dest_local_path; // overwrite case only 525 if (overwrite) { 526 base::File::Error error = GetFileInfoInternal( 527 db, context, dest_url, dest_file_id, 528 &dest_file_info, &dest_platform_file_info, &dest_local_path); 529 if (error == base::File::FILE_ERROR_NOT_FOUND) 530 overwrite = false; // fallback to non-overwrite case 531 else if (error != base::File::FILE_OK) 532 return error; 533 else if (dest_file_info.is_directory()) 534 return base::File::FILE_ERROR_INVALID_OPERATION; 535 } 536 if (!overwrite) { 537 FileId dest_parent_id; 538 if (!db->GetFileWithPath(VirtualPath::DirName(dest_url.path()), 539 &dest_parent_id)) { 540 return base::File::FILE_ERROR_NOT_FOUND; 541 } 542 543 dest_file_info = src_file_info; 544 dest_file_info.parent_id = dest_parent_id; 545 dest_file_info.name = 546 VirtualPath::BaseName(dest_url.path()).value(); 547 } 548 549 int64 growth = 0; 550 if (copy) 551 growth += src_platform_file_info.size; 552 else 553 growth -= UsageForPath(src_file_info.name.size()); 554 if (overwrite) 555 growth -= dest_platform_file_info.size; 556 else 557 growth += UsageForPath(dest_file_info.name.size()); 558 if (!AllocateQuota(context, growth)) 559 return base::File::FILE_ERROR_NO_SPACE; 560 561 /* 562 * Copy-with-overwrite 563 * Just overwrite data file 564 * Copy-without-overwrite 565 * Copy backing file 566 * Create new metadata pointing to new backing file. 567 * Move-with-overwrite 568 * transaction: 569 * Remove source entry. 570 * Point target entry to source entry's backing file. 571 * Delete target entry's old backing file 572 * Move-without-overwrite 573 * Just update metadata 574 */ 575 error = base::File::FILE_ERROR_FAILED; 576 if (copy) { 577 if (overwrite) { 578 error = NativeFileUtil::CopyOrMoveFile( 579 src_local_path, 580 dest_local_path, 581 option, 582 storage::NativeFileUtil::CopyOrMoveModeForDestination( 583 dest_url, true /* copy */)); 584 } else { // non-overwrite 585 error = CreateFile(context, src_local_path, dest_url, &dest_file_info); 586 } 587 } else { 588 if (overwrite) { 589 if (db->OverwritingMoveFile(src_file_id, dest_file_id)) { 590 if (base::File::FILE_OK != 591 NativeFileUtil::DeleteFile(dest_local_path)) 592 LOG(WARNING) << "Leaked a backing file."; 593 error = base::File::FILE_OK; 594 } else { 595 error = base::File::FILE_ERROR_FAILED; 596 } 597 } else { // non-overwrite 598 if (db->UpdateFileInfo(src_file_id, dest_file_info)) 599 error = base::File::FILE_OK; 600 else 601 error = base::File::FILE_ERROR_FAILED; 602 } 603 } 604 605 if (error != base::File::FILE_OK) 606 return error; 607 608 if (overwrite) { 609 context->change_observers()->Notify( 610 &FileChangeObserver::OnModifyFile, 611 MakeTuple(dest_url)); 612 } else { 613 context->change_observers()->Notify( 614 &FileChangeObserver::OnCreateFileFrom, 615 MakeTuple(dest_url, src_url)); 616 } 617 618 if (!copy) { 619 context->change_observers()->Notify( 620 &FileChangeObserver::OnRemoveFile, MakeTuple(src_url)); 621 TouchDirectory(db, src_file_info.parent_id); 622 } 623 624 TouchDirectory(db, dest_file_info.parent_id); 625 626 UpdateUsage(context, dest_url, growth); 627 return error; 628 } 629 630 base::File::Error ObfuscatedFileUtil::CopyInForeignFile( 631 FileSystemOperationContext* context, 632 const base::FilePath& src_file_path, 633 const FileSystemURL& dest_url) { 634 SandboxDirectoryDatabase* db = GetDirectoryDatabase(dest_url, true); 635 if (!db) 636 return base::File::FILE_ERROR_FAILED; 637 638 base::File::Info src_platform_file_info; 639 if (!base::GetFileInfo(src_file_path, &src_platform_file_info)) 640 return base::File::FILE_ERROR_NOT_FOUND; 641 642 FileId dest_file_id; 643 bool overwrite = db->GetFileWithPath(dest_url.path(), 644 &dest_file_id); 645 646 FileInfo dest_file_info; 647 base::File::Info dest_platform_file_info; // overwrite case only 648 if (overwrite) { 649 base::FilePath dest_local_path; 650 base::File::Error error = GetFileInfoInternal( 651 db, context, dest_url, dest_file_id, 652 &dest_file_info, &dest_platform_file_info, &dest_local_path); 653 if (error == base::File::FILE_ERROR_NOT_FOUND) 654 overwrite = false; // fallback to non-overwrite case 655 else if (error != base::File::FILE_OK) 656 return error; 657 else if (dest_file_info.is_directory()) 658 return base::File::FILE_ERROR_INVALID_OPERATION; 659 } 660 if (!overwrite) { 661 FileId dest_parent_id; 662 if (!db->GetFileWithPath(VirtualPath::DirName(dest_url.path()), 663 &dest_parent_id)) { 664 return base::File::FILE_ERROR_NOT_FOUND; 665 } 666 if (!dest_file_info.is_directory()) 667 return base::File::FILE_ERROR_FAILED; 668 InitFileInfo(&dest_file_info, dest_parent_id, 669 VirtualPath::BaseName(dest_url.path()).value()); 670 } 671 672 int64 growth = src_platform_file_info.size; 673 if (overwrite) 674 growth -= dest_platform_file_info.size; 675 else 676 growth += UsageForPath(dest_file_info.name.size()); 677 if (!AllocateQuota(context, growth)) 678 return base::File::FILE_ERROR_NO_SPACE; 679 680 base::File::Error error; 681 if (overwrite) { 682 base::FilePath dest_local_path = 683 DataPathToLocalPath(dest_url, dest_file_info.data_path); 684 error = NativeFileUtil::CopyOrMoveFile( 685 src_file_path, 686 dest_local_path, 687 FileSystemOperation::OPTION_NONE, 688 storage::NativeFileUtil::CopyOrMoveModeForDestination(dest_url, 689 true /* copy */)); 690 } else { 691 error = CreateFile(context, src_file_path, dest_url, &dest_file_info); 692 } 693 694 if (error != base::File::FILE_OK) 695 return error; 696 697 if (overwrite) { 698 context->change_observers()->Notify( 699 &FileChangeObserver::OnModifyFile, MakeTuple(dest_url)); 700 } else { 701 context->change_observers()->Notify( 702 &FileChangeObserver::OnCreateFile, MakeTuple(dest_url)); 703 } 704 705 UpdateUsage(context, dest_url, growth); 706 TouchDirectory(db, dest_file_info.parent_id); 707 return base::File::FILE_OK; 708 } 709 710 base::File::Error ObfuscatedFileUtil::DeleteFile( 711 FileSystemOperationContext* context, 712 const FileSystemURL& url) { 713 SandboxDirectoryDatabase* db = GetDirectoryDatabase(url, true); 714 if (!db) 715 return base::File::FILE_ERROR_FAILED; 716 FileId file_id; 717 if (!db->GetFileWithPath(url.path(), &file_id)) 718 return base::File::FILE_ERROR_NOT_FOUND; 719 720 FileInfo file_info; 721 base::File::Info platform_file_info; 722 base::FilePath local_path; 723 base::File::Error error = GetFileInfoInternal( 724 db, context, url, file_id, &file_info, &platform_file_info, &local_path); 725 if (error != base::File::FILE_ERROR_NOT_FOUND && 726 error != base::File::FILE_OK) 727 return error; 728 729 if (file_info.is_directory()) 730 return base::File::FILE_ERROR_NOT_A_FILE; 731 732 int64 growth = -UsageForPath(file_info.name.size()) - platform_file_info.size; 733 AllocateQuota(context, growth); 734 if (!db->RemoveFileInfo(file_id)) { 735 NOTREACHED(); 736 return base::File::FILE_ERROR_FAILED; 737 } 738 UpdateUsage(context, url, growth); 739 TouchDirectory(db, file_info.parent_id); 740 741 context->change_observers()->Notify( 742 &FileChangeObserver::OnRemoveFile, MakeTuple(url)); 743 744 if (error == base::File::FILE_ERROR_NOT_FOUND) 745 return base::File::FILE_OK; 746 747 error = NativeFileUtil::DeleteFile(local_path); 748 if (base::File::FILE_OK != error) 749 LOG(WARNING) << "Leaked a backing file."; 750 return base::File::FILE_OK; 751 } 752 753 base::File::Error ObfuscatedFileUtil::DeleteDirectory( 754 FileSystemOperationContext* context, 755 const FileSystemURL& url) { 756 SandboxDirectoryDatabase* db = GetDirectoryDatabase(url, true); 757 if (!db) 758 return base::File::FILE_ERROR_FAILED; 759 760 FileId file_id; 761 if (!db->GetFileWithPath(url.path(), &file_id)) 762 return base::File::FILE_ERROR_NOT_FOUND; 763 FileInfo file_info; 764 if (!db->GetFileInfo(file_id, &file_info)) { 765 NOTREACHED(); 766 return base::File::FILE_ERROR_FAILED; 767 } 768 if (!file_info.is_directory()) 769 return base::File::FILE_ERROR_NOT_A_DIRECTORY; 770 if (!db->RemoveFileInfo(file_id)) 771 return base::File::FILE_ERROR_NOT_EMPTY; 772 int64 growth = -UsageForPath(file_info.name.size()); 773 AllocateQuota(context, growth); 774 UpdateUsage(context, url, growth); 775 TouchDirectory(db, file_info.parent_id); 776 context->change_observers()->Notify( 777 &FileChangeObserver::OnRemoveDirectory, MakeTuple(url)); 778 return base::File::FILE_OK; 779 } 780 781 storage::ScopedFile ObfuscatedFileUtil::CreateSnapshotFile( 782 FileSystemOperationContext* context, 783 const FileSystemURL& url, 784 base::File::Error* error, 785 base::File::Info* file_info, 786 base::FilePath* platform_path) { 787 // We're just returning the local file information. 788 *error = GetFileInfo(context, url, file_info, platform_path); 789 if (*error == base::File::FILE_OK && file_info->is_directory) { 790 *file_info = base::File::Info(); 791 *error = base::File::FILE_ERROR_NOT_A_FILE; 792 } 793 return storage::ScopedFile(); 794 } 795 796 scoped_ptr<FileSystemFileUtil::AbstractFileEnumerator> 797 ObfuscatedFileUtil::CreateFileEnumerator( 798 FileSystemOperationContext* context, 799 const FileSystemURL& root_url, 800 bool recursive) { 801 SandboxDirectoryDatabase* db = GetDirectoryDatabase(root_url, false); 802 if (!db) { 803 return scoped_ptr<AbstractFileEnumerator>(new EmptyFileEnumerator()); 804 } 805 return scoped_ptr<AbstractFileEnumerator>( 806 new ObfuscatedFileEnumerator(db, context, this, root_url, recursive)); 807 } 808 809 bool ObfuscatedFileUtil::IsDirectoryEmpty( 810 FileSystemOperationContext* context, 811 const FileSystemURL& url) { 812 SandboxDirectoryDatabase* db = GetDirectoryDatabase(url, false); 813 if (!db) 814 return true; // Not a great answer, but it's what others do. 815 FileId file_id; 816 if (!db->GetFileWithPath(url.path(), &file_id)) 817 return true; // Ditto. 818 FileInfo file_info; 819 if (!db->GetFileInfo(file_id, &file_info)) { 820 DCHECK(!file_id); 821 // It's the root directory and the database hasn't been initialized yet. 822 return true; 823 } 824 if (!file_info.is_directory()) 825 return true; 826 std::vector<FileId> children; 827 // TODO(ericu): This could easily be made faster with help from the database. 828 if (!db->ListChildren(file_id, &children)) 829 return true; 830 return children.empty(); 831 } 832 833 base::FilePath ObfuscatedFileUtil::GetDirectoryForOriginAndType( 834 const GURL& origin, 835 const std::string& type_string, 836 bool create, 837 base::File::Error* error_code) { 838 base::FilePath origin_dir = GetDirectoryForOrigin(origin, create, error_code); 839 if (origin_dir.empty()) 840 return base::FilePath(); 841 if (type_string.empty()) 842 return origin_dir; 843 base::FilePath path = origin_dir.AppendASCII(type_string); 844 base::File::Error error = base::File::FILE_OK; 845 if (!base::DirectoryExists(path) && 846 (!create || !base::CreateDirectory(path))) { 847 error = create ? 848 base::File::FILE_ERROR_FAILED : 849 base::File::FILE_ERROR_NOT_FOUND; 850 } 851 852 if (error_code) 853 *error_code = error; 854 return path; 855 } 856 857 bool ObfuscatedFileUtil::DeleteDirectoryForOriginAndType( 858 const GURL& origin, 859 const std::string& type_string) { 860 base::File::Error error = base::File::FILE_OK; 861 base::FilePath origin_type_path = GetDirectoryForOriginAndType( 862 origin, type_string, false, &error); 863 if (origin_type_path.empty()) 864 return true; 865 if (error != base::File::FILE_ERROR_NOT_FOUND) { 866 // TODO(dmikurube): Consider the return value of DestroyDirectoryDatabase. 867 // We ignore its error now since 1) it doesn't matter the final result, and 868 // 2) it always returns false in Windows because of LevelDB's 869 // implementation. 870 // Information about failure would be useful for debugging. 871 if (!type_string.empty()) 872 DestroyDirectoryDatabase(origin, type_string); 873 if (!base::DeleteFile(origin_type_path, true /* recursive */)) 874 return false; 875 } 876 877 base::FilePath origin_path = VirtualPath::DirName(origin_type_path); 878 DCHECK_EQ(origin_path.value(), 879 GetDirectoryForOrigin(origin, false, NULL).value()); 880 881 if (!type_string.empty()) { 882 // At this point we are sure we had successfully deleted the origin/type 883 // directory (i.e. we're ready to just return true). 884 // See if we have other directories in this origin directory. 885 for (std::set<std::string>::iterator iter = known_type_strings_.begin(); 886 iter != known_type_strings_.end(); 887 ++iter) { 888 if (*iter == type_string) 889 continue; 890 if (base::DirectoryExists(origin_path.AppendASCII(*iter))) { 891 // Other type's directory exists; just return true here. 892 return true; 893 } 894 } 895 } 896 897 // No other directories seem exist. Try deleting the entire origin directory. 898 InitOriginDatabase(origin, false); 899 if (origin_database_) { 900 origin_database_->RemovePathForOrigin( 901 storage::GetIdentifierFromOrigin(origin)); 902 } 903 if (!base::DeleteFile(origin_path, true /* recursive */)) 904 return false; 905 906 return true; 907 } 908 909 ObfuscatedFileUtil::AbstractOriginEnumerator* 910 ObfuscatedFileUtil::CreateOriginEnumerator() { 911 std::vector<SandboxOriginDatabase::OriginRecord> origins; 912 913 InitOriginDatabase(GURL(), false); 914 return new ObfuscatedOriginEnumerator( 915 origin_database_.get(), file_system_directory_); 916 } 917 918 bool ObfuscatedFileUtil::DestroyDirectoryDatabase( 919 const GURL& origin, 920 const std::string& type_string) { 921 std::string key = GetDirectoryDatabaseKey(origin, type_string); 922 if (key.empty()) 923 return true; 924 DirectoryMap::iterator iter = directories_.find(key); 925 if (iter == directories_.end()) 926 return true; 927 scoped_ptr<SandboxDirectoryDatabase> database(iter->second); 928 directories_.erase(iter); 929 return database->DestroyDatabase(); 930 } 931 932 // static 933 int64 ObfuscatedFileUtil::ComputeFilePathCost(const base::FilePath& path) { 934 return UsageForPath(VirtualPath::BaseName(path).value().size()); 935 } 936 937 void ObfuscatedFileUtil::MaybePrepopulateDatabase( 938 const std::vector<std::string>& type_strings_to_prepopulate) { 939 SandboxPrioritizedOriginDatabase database(file_system_directory_, 940 env_override_); 941 std::string origin_string = database.GetPrimaryOrigin(); 942 if (origin_string.empty() || !database.HasOriginPath(origin_string)) 943 return; 944 const GURL origin = storage::GetOriginFromIdentifier(origin_string); 945 946 // Prepopulate the directory database(s) if and only if this instance 947 // has primary origin and the directory database is already there. 948 for (size_t i = 0; i < type_strings_to_prepopulate.size(); ++i) { 949 const std::string type_string = type_strings_to_prepopulate[i]; 950 // Only handles known types. 951 if (!ContainsKey(known_type_strings_, type_string)) 952 continue; 953 base::File::Error error = base::File::FILE_ERROR_FAILED; 954 base::FilePath path = GetDirectoryForOriginAndType( 955 origin, type_string, false, &error); 956 if (error != base::File::FILE_OK) 957 continue; 958 scoped_ptr<SandboxDirectoryDatabase> db( 959 new SandboxDirectoryDatabase(path, env_override_)); 960 if (db->Init(SandboxDirectoryDatabase::FAIL_ON_CORRUPTION)) { 961 directories_[GetDirectoryDatabaseKey(origin, type_string)] = db.release(); 962 MarkUsed(); 963 // Don't populate more than one database, as it may rather hurt 964 // performance. 965 break; 966 } 967 } 968 } 969 970 base::FilePath ObfuscatedFileUtil::GetDirectoryForURL( 971 const FileSystemURL& url, 972 bool create, 973 base::File::Error* error_code) { 974 return GetDirectoryForOriginAndType( 975 url.origin(), CallGetTypeStringForURL(url), create, error_code); 976 } 977 978 std::string ObfuscatedFileUtil::CallGetTypeStringForURL( 979 const FileSystemURL& url) { 980 DCHECK(!get_type_string_for_url_.is_null()); 981 return get_type_string_for_url_.Run(url); 982 } 983 984 base::File::Error ObfuscatedFileUtil::GetFileInfoInternal( 985 SandboxDirectoryDatabase* db, 986 FileSystemOperationContext* context, 987 const FileSystemURL& url, 988 FileId file_id, 989 FileInfo* local_info, 990 base::File::Info* file_info, 991 base::FilePath* platform_file_path) { 992 DCHECK(db); 993 DCHECK(context); 994 DCHECK(file_info); 995 DCHECK(platform_file_path); 996 997 if (!db->GetFileInfo(file_id, local_info)) { 998 NOTREACHED(); 999 return base::File::FILE_ERROR_FAILED; 1000 } 1001 1002 if (local_info->is_directory()) { 1003 file_info->size = 0; 1004 file_info->is_directory = true; 1005 file_info->is_symbolic_link = false; 1006 file_info->last_modified = local_info->modification_time; 1007 *platform_file_path = base::FilePath(); 1008 // We don't fill in ctime or atime. 1009 return base::File::FILE_OK; 1010 } 1011 if (local_info->data_path.empty()) 1012 return base::File::FILE_ERROR_INVALID_OPERATION; 1013 base::FilePath local_path = DataPathToLocalPath(url, local_info->data_path); 1014 base::File::Error error = NativeFileUtil::GetFileInfo( 1015 local_path, file_info); 1016 // We should not follow symbolic links in sandboxed file system. 1017 if (base::IsLink(local_path)) { 1018 LOG(WARNING) << "Found a symbolic file."; 1019 error = base::File::FILE_ERROR_NOT_FOUND; 1020 } 1021 if (error == base::File::FILE_OK) { 1022 *platform_file_path = local_path; 1023 } else if (error == base::File::FILE_ERROR_NOT_FOUND) { 1024 LOG(WARNING) << "Lost a backing file."; 1025 InvalidateUsageCache(context, url.origin(), url.type()); 1026 if (!db->RemoveFileInfo(file_id)) 1027 return base::File::FILE_ERROR_FAILED; 1028 } 1029 return error; 1030 } 1031 1032 base::File ObfuscatedFileUtil::CreateAndOpenFile( 1033 FileSystemOperationContext* context, 1034 const FileSystemURL& dest_url, 1035 FileInfo* dest_file_info, int file_flags) { 1036 SandboxDirectoryDatabase* db = GetDirectoryDatabase(dest_url, true); 1037 1038 base::FilePath root, dest_local_path; 1039 base::File::Error error = GenerateNewLocalPath(db, context, dest_url, &root, 1040 &dest_local_path); 1041 if (error != base::File::FILE_OK) 1042 return base::File(error); 1043 1044 if (base::PathExists(dest_local_path)) { 1045 if (!base::DeleteFile(dest_local_path, true /* recursive */)) 1046 return base::File(base::File::FILE_ERROR_FAILED); 1047 LOG(WARNING) << "A stray file detected"; 1048 InvalidateUsageCache(context, dest_url.origin(), dest_url.type()); 1049 } 1050 1051 base::File file = NativeFileUtil::CreateOrOpen(dest_local_path, file_flags); 1052 if (!file.IsValid()) 1053 return file.Pass(); 1054 1055 if (!file.created()) { 1056 file.Close(); 1057 base::DeleteFile(dest_local_path, false /* recursive */); 1058 return base::File(base::File::FILE_ERROR_FAILED); 1059 } 1060 1061 error = CommitCreateFile(root, dest_local_path, db, dest_file_info); 1062 if (error != base::File::FILE_OK) { 1063 file.Close(); 1064 base::DeleteFile(dest_local_path, false /* recursive */); 1065 return base::File(error); 1066 } 1067 1068 return file.Pass(); 1069 } 1070 1071 base::File::Error ObfuscatedFileUtil::CreateFile( 1072 FileSystemOperationContext* context, 1073 const base::FilePath& src_file_path, 1074 const FileSystemURL& dest_url, 1075 FileInfo* dest_file_info) { 1076 SandboxDirectoryDatabase* db = GetDirectoryDatabase(dest_url, true); 1077 1078 base::FilePath root, dest_local_path; 1079 base::File::Error error = GenerateNewLocalPath(db, context, dest_url, &root, 1080 &dest_local_path); 1081 if (error != base::File::FILE_OK) 1082 return error; 1083 1084 bool created = false; 1085 if (src_file_path.empty()) { 1086 if (base::PathExists(dest_local_path)) { 1087 if (!base::DeleteFile(dest_local_path, true /* recursive */)) 1088 return base::File::FILE_ERROR_FAILED; 1089 LOG(WARNING) << "A stray file detected"; 1090 InvalidateUsageCache(context, dest_url.origin(), dest_url.type()); 1091 } 1092 1093 error = NativeFileUtil::EnsureFileExists(dest_local_path, &created); 1094 } else { 1095 error = NativeFileUtil::CopyOrMoveFile( 1096 src_file_path, 1097 dest_local_path, 1098 FileSystemOperation::OPTION_NONE, 1099 storage::NativeFileUtil::CopyOrMoveModeForDestination(dest_url, 1100 true /* copy */)); 1101 created = true; 1102 } 1103 if (error != base::File::FILE_OK) 1104 return error; 1105 if (!created) 1106 return base::File::FILE_ERROR_FAILED; 1107 1108 return CommitCreateFile(root, dest_local_path, db, dest_file_info); 1109 } 1110 1111 base::File::Error ObfuscatedFileUtil::CommitCreateFile( 1112 const base::FilePath& root, 1113 const base::FilePath& local_path, 1114 SandboxDirectoryDatabase* db, 1115 FileInfo* dest_file_info) { 1116 // This removes the root, including the trailing slash, leaving a relative 1117 // path. 1118 dest_file_info->data_path = base::FilePath( 1119 local_path.value().substr(root.value().length() + 1)); 1120 1121 FileId file_id; 1122 base::File::Error error = db->AddFileInfo(*dest_file_info, &file_id); 1123 if (error != base::File::FILE_OK) 1124 return error; 1125 1126 TouchDirectory(db, dest_file_info->parent_id); 1127 return base::File::FILE_OK; 1128 } 1129 1130 base::FilePath ObfuscatedFileUtil::DataPathToLocalPath( 1131 const FileSystemURL& url, const base::FilePath& data_path) { 1132 base::File::Error error = base::File::FILE_OK; 1133 base::FilePath root = GetDirectoryForURL(url, false, &error); 1134 if (error != base::File::FILE_OK) 1135 return base::FilePath(); 1136 return root.Append(data_path); 1137 } 1138 1139 std::string ObfuscatedFileUtil::GetDirectoryDatabaseKey( 1140 const GURL& origin, const std::string& type_string) { 1141 if (type_string.empty()) { 1142 LOG(WARNING) << "Unknown filesystem type requested:" << type_string; 1143 return std::string(); 1144 } 1145 // For isolated origin we just use a type string as a key. 1146 return storage::GetIdentifierFromOrigin(origin) + type_string; 1147 } 1148 1149 // TODO(ericu): How to do the whole validation-without-creation thing? 1150 // We may not have quota even to create the database. 1151 // Ah, in that case don't even get here? 1152 // Still doesn't answer the quota issue, though. 1153 SandboxDirectoryDatabase* ObfuscatedFileUtil::GetDirectoryDatabase( 1154 const FileSystemURL& url, bool create) { 1155 std::string key = GetDirectoryDatabaseKey( 1156 url.origin(), CallGetTypeStringForURL(url)); 1157 if (key.empty()) 1158 return NULL; 1159 1160 DirectoryMap::iterator iter = directories_.find(key); 1161 if (iter != directories_.end()) { 1162 MarkUsed(); 1163 return iter->second; 1164 } 1165 1166 base::File::Error error = base::File::FILE_OK; 1167 base::FilePath path = GetDirectoryForURL(url, create, &error); 1168 if (error != base::File::FILE_OK) { 1169 LOG(WARNING) << "Failed to get origin+type directory: " 1170 << url.DebugString() << " error:" << error; 1171 return NULL; 1172 } 1173 MarkUsed(); 1174 SandboxDirectoryDatabase* database = 1175 new SandboxDirectoryDatabase(path, env_override_); 1176 directories_[key] = database; 1177 return database; 1178 } 1179 1180 base::FilePath ObfuscatedFileUtil::GetDirectoryForOrigin( 1181 const GURL& origin, bool create, base::File::Error* error_code) { 1182 if (!InitOriginDatabase(origin, create)) { 1183 if (error_code) { 1184 *error_code = create ? 1185 base::File::FILE_ERROR_FAILED : 1186 base::File::FILE_ERROR_NOT_FOUND; 1187 } 1188 return base::FilePath(); 1189 } 1190 base::FilePath directory_name; 1191 std::string id = storage::GetIdentifierFromOrigin(origin); 1192 1193 bool exists_in_db = origin_database_->HasOriginPath(id); 1194 if (!exists_in_db && !create) { 1195 if (error_code) 1196 *error_code = base::File::FILE_ERROR_NOT_FOUND; 1197 return base::FilePath(); 1198 } 1199 if (!origin_database_->GetPathForOrigin(id, &directory_name)) { 1200 if (error_code) 1201 *error_code = base::File::FILE_ERROR_FAILED; 1202 return base::FilePath(); 1203 } 1204 1205 base::FilePath path = file_system_directory_.Append(directory_name); 1206 bool exists_in_fs = base::DirectoryExists(path); 1207 if (!exists_in_db && exists_in_fs) { 1208 if (!base::DeleteFile(path, true)) { 1209 if (error_code) 1210 *error_code = base::File::FILE_ERROR_FAILED; 1211 return base::FilePath(); 1212 } 1213 exists_in_fs = false; 1214 } 1215 1216 if (!exists_in_fs) { 1217 if (!create || !base::CreateDirectory(path)) { 1218 if (error_code) 1219 *error_code = create ? 1220 base::File::FILE_ERROR_FAILED : 1221 base::File::FILE_ERROR_NOT_FOUND; 1222 return base::FilePath(); 1223 } 1224 } 1225 1226 if (error_code) 1227 *error_code = base::File::FILE_OK; 1228 1229 return path; 1230 } 1231 1232 void ObfuscatedFileUtil::InvalidateUsageCache( 1233 FileSystemOperationContext* context, 1234 const GURL& origin, 1235 FileSystemType type) { 1236 if (sandbox_delegate_) 1237 sandbox_delegate_->InvalidateUsageCache(origin, type); 1238 } 1239 1240 void ObfuscatedFileUtil::MarkUsed() { 1241 if (!timer_) 1242 timer_.reset(new TimedTaskHelper(file_task_runner_.get())); 1243 1244 if (timer_->IsRunning()) { 1245 timer_->Reset(); 1246 } else { 1247 timer_->Start(FROM_HERE, 1248 base::TimeDelta::FromSeconds(db_flush_delay_seconds_), 1249 base::Bind(&ObfuscatedFileUtil::DropDatabases, 1250 base::Unretained(this))); 1251 } 1252 } 1253 1254 void ObfuscatedFileUtil::DropDatabases() { 1255 origin_database_.reset(); 1256 STLDeleteContainerPairSecondPointers( 1257 directories_.begin(), directories_.end()); 1258 directories_.clear(); 1259 timer_.reset(); 1260 } 1261 1262 bool ObfuscatedFileUtil::InitOriginDatabase(const GURL& origin_hint, 1263 bool create) { 1264 if (origin_database_) 1265 return true; 1266 1267 if (!create && !base::DirectoryExists(file_system_directory_)) 1268 return false; 1269 if (!base::CreateDirectory(file_system_directory_)) { 1270 LOG(WARNING) << "Failed to create FileSystem directory: " << 1271 file_system_directory_.value(); 1272 return false; 1273 } 1274 1275 SandboxPrioritizedOriginDatabase* prioritized_origin_database = 1276 new SandboxPrioritizedOriginDatabase(file_system_directory_, 1277 env_override_); 1278 origin_database_.reset(prioritized_origin_database); 1279 1280 if (origin_hint.is_empty() || !HasIsolatedStorage(origin_hint)) 1281 return true; 1282 1283 const std::string isolated_origin_string = 1284 storage::GetIdentifierFromOrigin(origin_hint); 1285 1286 // TODO(kinuko): Deprecate this after a few release cycles, e.g. around M33. 1287 base::FilePath isolated_origin_dir = file_system_directory_.Append( 1288 SandboxIsolatedOriginDatabase::kObsoleteOriginDirectory); 1289 if (base::DirectoryExists(isolated_origin_dir) && 1290 prioritized_origin_database->GetSandboxOriginDatabase()) { 1291 SandboxIsolatedOriginDatabase::MigrateBackFromObsoleteOriginDatabase( 1292 isolated_origin_string, 1293 file_system_directory_, 1294 prioritized_origin_database->GetSandboxOriginDatabase()); 1295 } 1296 1297 prioritized_origin_database->InitializePrimaryOrigin( 1298 isolated_origin_string); 1299 1300 return true; 1301 } 1302 1303 base::File::Error ObfuscatedFileUtil::GenerateNewLocalPath( 1304 SandboxDirectoryDatabase* db, 1305 FileSystemOperationContext* context, 1306 const FileSystemURL& url, 1307 base::FilePath* root, 1308 base::FilePath* local_path) { 1309 DCHECK(local_path); 1310 int64 number; 1311 if (!db || !db->GetNextInteger(&number)) 1312 return base::File::FILE_ERROR_FAILED; 1313 1314 base::File::Error error = base::File::FILE_OK; 1315 *root = GetDirectoryForURL(url, false, &error); 1316 if (error != base::File::FILE_OK) 1317 return error; 1318 1319 // We use the third- and fourth-to-last digits as the directory. 1320 int64 directory_number = number % 10000 / 100; 1321 base::FilePath new_local_path = root->AppendASCII( 1322 base::StringPrintf("%02" PRId64, directory_number)); 1323 1324 error = NativeFileUtil::CreateDirectory( 1325 new_local_path, false /* exclusive */, false /* recursive */); 1326 if (error != base::File::FILE_OK) 1327 return error; 1328 1329 *local_path = 1330 new_local_path.AppendASCII(base::StringPrintf("%08" PRId64, number)); 1331 return base::File::FILE_OK; 1332 } 1333 1334 base::File ObfuscatedFileUtil::CreateOrOpenInternal( 1335 FileSystemOperationContext* context, 1336 const FileSystemURL& url, int file_flags) { 1337 DCHECK(!(file_flags & (base::File::FLAG_DELETE_ON_CLOSE | 1338 base::File::FLAG_HIDDEN | base::File::FLAG_EXCLUSIVE_READ | 1339 base::File::FLAG_EXCLUSIVE_WRITE))); 1340 SandboxDirectoryDatabase* db = GetDirectoryDatabase(url, true); 1341 if (!db) 1342 return base::File(base::File::FILE_ERROR_FAILED); 1343 FileId file_id; 1344 if (!db->GetFileWithPath(url.path(), &file_id)) { 1345 // The file doesn't exist. 1346 if (!(file_flags & (base::File::FLAG_CREATE | 1347 base::File::FLAG_CREATE_ALWAYS | base::File::FLAG_OPEN_ALWAYS))) { 1348 return base::File(base::File::FILE_ERROR_NOT_FOUND); 1349 } 1350 FileId parent_id; 1351 if (!db->GetFileWithPath(VirtualPath::DirName(url.path()), &parent_id)) 1352 return base::File(base::File::FILE_ERROR_NOT_FOUND); 1353 FileInfo file_info; 1354 InitFileInfo(&file_info, parent_id, 1355 VirtualPath::BaseName(url.path()).value()); 1356 1357 int64 growth = UsageForPath(file_info.name.size()); 1358 if (!AllocateQuota(context, growth)) 1359 return base::File(base::File::FILE_ERROR_NO_SPACE); 1360 base::File file = CreateAndOpenFile(context, url, &file_info, file_flags); 1361 if (file.IsValid()) { 1362 UpdateUsage(context, url, growth); 1363 context->change_observers()->Notify( 1364 &FileChangeObserver::OnCreateFile, MakeTuple(url)); 1365 } 1366 return file.Pass(); 1367 } 1368 1369 if (file_flags & base::File::FLAG_CREATE) 1370 return base::File(base::File::FILE_ERROR_EXISTS); 1371 1372 base::File::Info platform_file_info; 1373 base::FilePath local_path; 1374 FileInfo file_info; 1375 base::File::Error error = GetFileInfoInternal( 1376 db, context, url, file_id, &file_info, &platform_file_info, &local_path); 1377 if (error != base::File::FILE_OK) 1378 return base::File(error); 1379 if (file_info.is_directory()) 1380 return base::File(base::File::FILE_ERROR_NOT_A_FILE); 1381 1382 int64 delta = 0; 1383 if (file_flags & (base::File::FLAG_CREATE_ALWAYS | 1384 base::File::FLAG_OPEN_TRUNCATED)) { 1385 // The file exists and we're truncating. 1386 delta = -platform_file_info.size; 1387 AllocateQuota(context, delta); 1388 } 1389 1390 base::File file = NativeFileUtil::CreateOrOpen(local_path, file_flags); 1391 if (!file.IsValid()) { 1392 error = file.error_details(); 1393 if (error == base::File::FILE_ERROR_NOT_FOUND) { 1394 // TODO(tzik): Also invalidate on-memory usage cache in UsageTracker. 1395 // TODO(tzik): Delete database entry after ensuring the file lost. 1396 InvalidateUsageCache(context, url.origin(), url.type()); 1397 LOG(WARNING) << "Lost a backing file."; 1398 return base::File(base::File::FILE_ERROR_FAILED); 1399 } 1400 return file.Pass(); 1401 } 1402 1403 // If truncating we need to update the usage. 1404 if (delta) { 1405 UpdateUsage(context, url, delta); 1406 context->change_observers()->Notify( 1407 &FileChangeObserver::OnModifyFile, MakeTuple(url)); 1408 } 1409 return file.Pass(); 1410 } 1411 1412 bool ObfuscatedFileUtil::HasIsolatedStorage(const GURL& origin) { 1413 return special_storage_policy_.get() && 1414 special_storage_policy_->HasIsolatedStorage(origin); 1415 } 1416 1417 } // namespace storage 1418
