DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Implementation

Mercurial (fddffdeab170)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_dom_quota_quotamanager_h__
#define mozilla_dom_quota_quotamanager_h__

#include "QuotaCommon.h"

#include "nsIObserver.h"
#include "nsIQuotaManager.h"

#include "mozilla/dom/Nullable.h"
#include "mozilla/dom/ipc/IdType.h"
#include "mozilla/Mutex.h"

#include "nsClassHashtable.h"
#include "nsRefPtrHashtable.h"

#include "Client.h"
#include "PersistenceType.h"

#define QUOTA_MANAGER_CONTRACTID "@mozilla.org/dom/quota/manager;1"

class nsIPrincipal;
class nsIThread;
class nsITimer;
class nsIURI;
class nsPIDOMWindow;
class nsIRunnable;

namespace mozilla {
namespace dom {
class OptionalContentId;
} // namespace dom
} // namespace mozilla

BEGIN_QUOTA_NAMESPACE

class DirectoryLockImpl;
class GroupInfo;
class GroupInfoPair;
class OriginInfo;
class OriginScope;
class QuotaObject;

class NS_NO_VTABLE RefCountedObject
{
public:
  NS_IMETHOD_(MozExternalRefCountType)
  AddRef() = 0;

  NS_IMETHOD_(MozExternalRefCountType)
  Release() = 0;
};

// nsISupports is needed for nsMainThreadPtrHandle<DirectoryLock>
// XXX RemoveMe once bug 1164581 gets fixed.
class DirectoryLock
  : public nsISupports
{
  friend class DirectoryLockImpl;

private:
  DirectoryLock()
  { }

  ~DirectoryLock()
  { }
};

class NS_NO_VTABLE OpenDirectoryListener
  : public RefCountedObject
{
public:
  virtual void
  DirectoryLockAcquired(DirectoryLock* aLock) = 0;

  virtual void
  DirectoryLockFailed() = 0;

protected:
  virtual ~OpenDirectoryListener()
  { }
};

struct OriginParams
{
  OriginParams(PersistenceType aPersistenceType,
               const nsACString& aOrigin,
               bool aIsApp)
  : mOrigin(aOrigin)
  , mPersistenceType(aPersistenceType)
  , mIsApp(aIsApp)
  { }

  nsCString mOrigin;
  PersistenceType mPersistenceType;
  bool mIsApp;
};

class QuotaManager final : public nsIQuotaManager,
                           public nsIObserver
{
  friend class DirectoryLockImpl;
  friend class GroupInfo;
  friend class OriginInfo;
  friend class QuotaObject;

  enum MozBrowserPatternFlag
  {
    MozBrowser = 0,
    NotMozBrowser,
    IgnoreMozBrowser
  };

  typedef nsClassHashtable<nsCStringHashKey,
                           nsTArray<DirectoryLockImpl*>> DirectoryLockTable;

public:
  NS_DECL_ISUPPORTS
  NS_DECL_NSIQUOTAMANAGER
  NS_DECL_NSIOBSERVER

  static const char kReplaceChars[];

  // Returns a non-owning reference.
  static QuotaManager*
  GetOrCreate();

  // Returns a non-owning reference.
  static QuotaManager*
  Get();

  // Returns an owning reference! No one should call this but the factory.
  static QuotaManager*
  FactoryCreate();

  // Returns true if we've begun the shutdown process.
  static bool IsShuttingDown();

  bool
  IsOriginInitialized(const nsACString& aOrigin) const
  {
    AssertIsOnIOThread();

    return mInitializedOrigins.Contains(aOrigin);
  }

  bool
  IsTemporaryStorageInitialized() const
  {
    AssertIsOnIOThread();

    return mTemporaryStorageInitialized;
  }

  void
  InitQuotaForOrigin(PersistenceType aPersistenceType,
                     const nsACString& aGroup,
                     const nsACString& aOrigin,
                     bool aIsApp,
                     uint64_t aUsageBytes,
                     int64_t aAccessTime);

  void
  DecreaseUsageForOrigin(PersistenceType aPersistenceType,
                         const nsACString& aGroup,
                         const nsACString& aOrigin,
                         int64_t aSize);

  void
  UpdateOriginAccessTime(PersistenceType aPersistenceType,
                         const nsACString& aGroup,
                         const nsACString& aOrigin);

  void
  RemoveQuota();

  void
  RemoveQuotaForOrigin(PersistenceType aPersistenceType,
                       const nsACString& aGroup,
                       const nsACString& aOrigin)
  {
    MutexAutoLock lock(mQuotaMutex);
    LockedRemoveQuotaForOrigin(aPersistenceType, aGroup, aOrigin);
  }

  already_AddRefed<QuotaObject>
  GetQuotaObject(PersistenceType aPersistenceType,
                 const nsACString& aGroup,
                 const nsACString& aOrigin,
                 nsIFile* aFile);

  already_AddRefed<QuotaObject>
  GetQuotaObject(PersistenceType aPersistenceType,
                 const nsACString& aGroup,
                 const nsACString& aOrigin,
                 const nsAString& aPath);

  // Called when a process is being shot down. Aborts any running operations
  // for the given process.
  void
  AbortOperationsForProcess(ContentParentId aContentParentId);

  nsresult
  GetDirectoryForOrigin(PersistenceType aPersistenceType,
                        const nsACString& aASCIIOrigin,
                        nsIFile** aDirectory) const;

  // This is the main entry point into the QuotaManager API.
  // Any storage API implementation (quota client) that participates in
  // centralized quota and storage handling should call this method to get
  // a directory lock which will protect client's files from being deleted
  // while they are still in use.
  // After a lock is acquired, client is notified via the open listener's
  // method DirectoryLockAcquired. If the lock couldn't be acquired, client
  // gets DirectoryLockFailed notification.
  // A lock is a reference counted object and at the time DirectoryLockAcquired
  // is called, quota manager holds just one strong reference to it which is
  // then immediatelly cleared by quota manager. So it's up to client to add
  // a new reference in order to keep the lock alive.
  // Unlocking is simply done by dropping all references to the lock object.
  // In other words, protection which the lock represents dies with the lock
  // object itself.
  void
  OpenDirectory(PersistenceType aPersistenceType,
                const nsACString& aGroup,
                const nsACString& aOrigin,
                bool aIsApp,
                Client::Type aClientType,
                bool aExclusive,
                OpenDirectoryListener* aOpenListener);

  // XXX RemoveMe once bug 1170279 gets fixed.
  void
  OpenDirectoryInternal(Nullable<PersistenceType> aPersistenceType,
                        const OriginScope& aOriginScope,
                        bool aExclusive,
                        OpenDirectoryListener* aOpenListener);

  // Collect inactive and the least recently used origins.
  uint64_t
  CollectOriginsForEviction(uint64_t aMinSizeToBeFreed,
                            nsTArray<RefPtr<DirectoryLockImpl>>& aLocks);

  nsresult
  EnsureOriginIsInitialized(PersistenceType aPersistenceType,
                            const nsACString& aGroup,
                            const nsACString& aOrigin,
                            bool aIsApp,
                            nsIFile** aDirectory);

  void
  OriginClearCompleted(PersistenceType aPersistenceType,
                       const nsACString& aOrigin,
                       bool aIsApp);

  void
  ResetOrClearCompleted();

  void
  AssertCurrentThreadOwnsQuotaMutex()
  {
    mQuotaMutex.AssertCurrentThreadOwns();
  }

  nsIThread*
  IOThread()
  {
    NS_ASSERTION(mIOThread, "This should never be null!");
    return mIOThread;
  }

  Client*
  GetClient(Client::Type aClientType);

  const nsString&
  GetStoragePath() const
  {
    return mStoragePath;
  }

  const nsString&
  GetStoragePath(PersistenceType aPersistenceType) const
  {
    if (aPersistenceType == PERSISTENCE_TYPE_PERSISTENT) {
      return mPermanentStoragePath;
    }

    if (aPersistenceType == PERSISTENCE_TYPE_TEMPORARY) {
      return mTemporaryStoragePath;
    }

    MOZ_ASSERT(aPersistenceType == PERSISTENCE_TYPE_DEFAULT);

    return mDefaultStoragePath;
  }

  uint64_t
  GetGroupLimit() const;

  static void
  GetStorageId(PersistenceType aPersistenceType,
               const nsACString& aOrigin,
               Client::Type aClientType,
               nsACString& aDatabaseId);

  static nsresult
  GetInfoFromPrincipal(nsIPrincipal* aPrincipal,
                       nsACString* aGroup,
                       nsACString* aOrigin,
                       bool* aIsApp);

  static nsresult
  GetInfoFromWindow(nsPIDOMWindow* aWindow,
                    nsACString* aGroup,
                    nsACString* aOrigin,
                    bool* aIsApp);

  static void
  GetInfoForChrome(nsACString* aGroup,
                   nsACString* aOrigin,
                   bool* aIsApp);

  static bool
  IsOriginWhitelistedForPersistentStorage(const nsACString& aOrigin);

  static bool
  IsFirstPromptRequired(PersistenceType aPersistenceType,
                        const nsACString& aOrigin,
                        bool aIsApp);

  static bool
  IsQuotaEnforced(PersistenceType aPersistenceType,
                  const nsACString& aOrigin,
                  bool aIsApp);

  static void
  ChromeOrigin(nsACString& aOrigin);

  static void
  GetOriginPatternString(uint32_t aAppId, bool aBrowserOnly,
                         const nsACString& aOrigin, nsAutoCString& _retval)
  {
    return GetOriginPatternString(aAppId,
                                  aBrowserOnly ? MozBrowser : NotMozBrowser,
                                  aOrigin, _retval);
  }

  static void
  GetOriginPatternStringMaybeIgnoreBrowser(uint32_t aAppId, bool aBrowserOnly,
                                           nsAutoCString& _retval)
  {
    return GetOriginPatternString(aAppId,
                                  aBrowserOnly ? MozBrowser : IgnoreMozBrowser,
                                  EmptyCString(), _retval);
  }

  static nsresult
  GetDirectoryMetadata(nsIFile* aDirectory,
                       int64_t* aTimestamp,
                       nsACString& aGroup,
                       nsACString& aOrigin,
                       bool* aIsApp);

private:
  QuotaManager();

  virtual ~QuotaManager();

  nsresult
  Init();

  already_AddRefed<DirectoryLockImpl>
  CreateDirectoryLock(Nullable<PersistenceType> aPersistenceType,
                      const nsACString& aGroup,
                      const OriginScope& aOriginScope,
                      Nullable<bool> aIsApp,
                      Nullable<Client::Type> aClientType,
                      bool aExclusive,
                      bool aInternal,
                      OpenDirectoryListener* aOpenListener);

  already_AddRefed<DirectoryLockImpl>
  CreateDirectoryLockForEviction(PersistenceType aPersistenceType,
                                 const nsACString& aGroup,
                                 const nsACString& aOrigin,
                                 bool aIsApp);

  void
  RegisterDirectoryLock(DirectoryLockImpl* aLock);

  void
  UnregisterDirectoryLock(DirectoryLockImpl* aLock);

  void
  RemovePendingDirectoryLock(DirectoryLockImpl* aLock);

  uint64_t
  LockedCollectOriginsForEviction(
                                 uint64_t aMinSizeToBeFreed,
                                 nsTArray<RefPtr<DirectoryLockImpl>>& aLocks);

  void
  LockedRemoveQuotaForOrigin(PersistenceType aPersistenceType,
                             const nsACString& aGroup,
                             const nsACString& aOrigin);

  nsresult
  MaybeUpgradeIndexedDBDirectory();

  nsresult
  MaybeUpgradePersistentStorageDirectory();

  nsresult
  MaybeUpgradeStorageArea();

  nsresult
  InitializeRepository(PersistenceType aPersistenceType);

  nsresult
  InitializeOrigin(PersistenceType aPersistenceType,
                   const nsACString& aGroup,
                   const nsACString& aOrigin,
                   bool aIsApp,
                   int64_t aAccessTime,
                   nsIFile* aDirectory);

  nsresult
  ClearStoragesForApp(uint32_t aAppId, bool aBrowserOnly);

  void
  CheckTemporaryStorageLimits();

  void
  DeleteFilesForOrigin(PersistenceType aPersistenceType,
                       const nsACString& aOrigin);

  void
  FinalizeOriginEviction(nsTArray<RefPtr<DirectoryLockImpl>>& aLocks);

  void
  ReleaseIOThreadObjects()
  {
    AssertIsOnIOThread();

    for (uint32_t index = 0; index < Client::TYPE_MAX; index++) {
      mClients[index]->ReleaseIOThreadObjects();
    }
  }

  DirectoryLockTable&
  GetDirectoryLockTable(PersistenceType aPersistenceType);

  static void
  GetOriginPatternString(uint32_t aAppId,
                         MozBrowserPatternFlag aBrowserFlag,
                         const nsACString& aOrigin,
                         nsAutoCString& _retval);

  static PLDHashOperator
  RemoveQuotaCallback(const nsACString& aKey,
                      nsAutoPtr<GroupInfoPair>& aValue,
                      void* aUserArg);

  static PLDHashOperator
  GetOriginsExceedingGroupLimit(const nsACString& aKey,
                                GroupInfoPair* aValue,
                                void* aUserArg);

  static PLDHashOperator
  GetAllTemporaryStorageOrigins(const nsACString& aKey,
                                GroupInfoPair* aValue,
                                void* aUserArg);

  mozilla::Mutex mQuotaMutex;

  nsClassHashtable<nsCStringHashKey, GroupInfoPair> mGroupInfoPairs;

  // Maintains a list of directory locks that are queued.
  nsTArray<RefPtr<DirectoryLockImpl>> mPendingDirectoryLocks;

  // Maintains a list of directory locks that are acquired or queued.
  nsTArray<DirectoryLockImpl*> mDirectoryLocks;

  // Directory lock tables that are used to update origin access time.
  DirectoryLockTable mTemporaryDirectoryLockTable;
  DirectoryLockTable mDefaultDirectoryLockTable;

  // Thread on which IO is performed.
  nsCOMPtr<nsIThread> mIOThread;

  // A timer that gets activated at shutdown to ensure we close all storages.
  nsCOMPtr<nsITimer> mShutdownTimer;

  // A list of all successfully initialized origins. This list isn't protected
  // by any mutex but it is only ever touched on the IO thread.
  nsTArray<nsCString> mInitializedOrigins;

  nsAutoTArray<RefPtr<Client>, Client::TYPE_MAX> mClients;

  nsString mIndexedDBPath;
  nsString mStoragePath;
  nsString mPermanentStoragePath;
  nsString mTemporaryStoragePath;
  nsString mDefaultStoragePath;

  uint64_t mTemporaryStorageLimit;
  uint64_t mTemporaryStorageUsage;
  bool mTemporaryStorageInitialized;

  bool mStorageAreaInitialized;
};

END_QUOTA_NAMESPACE

#endif /* mozilla_dom_quota_quotamanager_h__ */