gecko-dev/dom/quota/QuotaManager.h

/* -*- 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 <cstdint>
#include <utility>
#include "Client.h"
#include "ErrorList.h"
#include "mozilla/AlreadyAddRefed.h"
#include "mozilla/Assertions.h"
#include "mozilla/InitializedOnce.h"
#include "mozilla/Mutex.h"
#include "mozilla/RefPtr.h"
#include "mozilla/Result.h"
#include "mozilla/dom/Nullable.h"
#include "mozilla/dom/ipc/IdType.h"
#include "mozilla/dom/quota/CommonMetadata.h"
#include "mozilla/dom/quota/ForwardDecls.h"
#include "mozilla/dom/quota/InitializationTypes.h"
#include "mozilla/dom/quota/PersistenceType.h"
#include "mozilla/dom/quota/QuotaCommon.h"
#include "nsCOMPtr.h"
#include "nsClassHashtable.h"
#include "nsTHashMap.h"
#include "nsDebug.h"
#include "nsHashKeys.h"
#include "nsISupports.h"
#include "nsStringFwd.h"
#include "nsTArray.h"
#include "nsTStringRepr.h"
#include "nscore.h"
#include "prenv.h"

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

class mozIStorageConnection;
class nsIEventTarget;
class nsIFile;
class nsIPrincipal;
class nsIRunnable;
class nsIThread;
class nsITimer;
class nsPIDOMWindowOuter;

namespace mozilla {

class OriginAttributes;

namespace ipc {

class PrincipalInfo;

}  // namespace ipc

}  // namespace mozilla

namespace mozilla::dom::quota {

class ClientUsageArray;
class ClientDirectoryLock;
class DirectoryLockImpl;
class GroupInfo;
class GroupInfoPair;
class OriginDirectoryLock;
class OriginInfo;
class OriginScope;
class QuotaObject;
class UniversalDirectoryLock;

class QuotaManager final : public BackgroundThreadObject {
  friend class DirectoryLockImpl;
  friend class GroupInfo;
  friend class OriginInfo;
  friend class QuotaObject;

  using PrincipalInfo = mozilla::ipc::PrincipalInfo;
  using DirectoryLockTable =
      nsClassHashtable<nsCStringHashKey, nsTArray<NotNull<DirectoryLockImpl*>>>;

  class Observer;

 public:
  QuotaManager(const nsAString& aBasePath, const nsAString& aStorageName);

  NS_INLINE_DECL_REFCOUNTING(QuotaManager)

  static nsresult Initialize();

  static bool IsRunningXPCShellTests() {
    static bool kRunningXPCShellTests =
        !!PR_GetEnv("XPCSHELL_TEST_PROFILE_DIR");
    return kRunningXPCShellTests;
  }

  static bool IsRunningGTests() {
    static bool kRunningGTests = !!PR_GetEnv("MOZ_RUN_GTEST");
    return kRunningGTests;
  }

  static const char kReplaceChars[];

  static Result<MovingNotNull<RefPtr<QuotaManager>>, nsresult> GetOrCreate();

  static Result<Ok, nsresult> EnsureCreated();

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

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

  static void ShutdownInstance();

  static bool IsOSMetadata(const nsAString& aFileName);

  static bool IsDotFile(const nsAString& aFileName);

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

    return mInitializedOrigins.Contains(aOrigin);
  }

  bool IsTemporaryStorageInitialized() const {
    AssertIsOnIOThread();

    return mTemporaryStorageInitialized;
  }

  /**
   * For initialization of an origin where the directory already exists. This is
   * used by EnsureTemporaryStorageIsInitialized/InitializeRepository once it
   * has tallied origin usage by calling each of the QuotaClient InitOrigin
   * methods.
   */
  void InitQuotaForOrigin(const FullOriginMetadata& aFullOriginMetadata,
                          const ClientUsageArray& aClientUsages,
                          uint64_t aUsageBytes);

  /**
   * For use in special-cases like LSNG where we need to be able to know that
   * there is no data stored for an origin. LSNG knows that there is 0 usage for
   * its storage of an origin and wants to make sure there is a QuotaObject
   * tracking this. This method will create a non-persisted, 0-usage,
   * mDirectoryExists=false OriginInfo if there isn't already an OriginInfo. If
   * an OriginInfo already exists, it will be left as-is, because that implies a
   * different client has usages for the origin (and there's no need to add
   * LSNG's 0 usage to the QuotaObject).
   */
  void EnsureQuotaForOrigin(const OriginMetadata& aOriginMetadata);

  /**
   * For use when creating an origin directory. It's possible that origin usage
   * is already being tracked due to a call to EnsureQuotaForOrigin, and in that
   * case we need to update the existing OriginInfo rather than create a new
   * one.
   *
   * @return last access time of the origin.
   */
  int64_t NoteOriginDirectoryCreated(const OriginMetadata& aOriginMetadata,
                                     bool aPersisted);

  // XXX clients can use QuotaObject instead of calling this method directly.
  void DecreaseUsageForClient(const ClientMetadata& aClientMetadata,
                              int64_t aSize);

  void ResetUsageForClient(const ClientMetadata& aClientMetadata);

  UsageInfo GetUsageForClient(PersistenceType aPersistenceType,
                              const OriginMetadata& aOriginMetadata,
                              Client::Type aClientType);

  void UpdateOriginAccessTime(PersistenceType aPersistenceType,
                              const OriginMetadata& aOriginMetadata);

  void RemoveQuota();

  void RemoveQuotaForOrigin(PersistenceType aPersistenceType,
                            const OriginMetadata& aOriginMetadata) {
    MutexAutoLock lock(mQuotaMutex);
    LockedRemoveQuotaForOrigin(aPersistenceType, aOriginMetadata);
  }

  nsresult LoadQuota();

  void UnloadQuota();

  already_AddRefed<QuotaObject> GetQuotaObject(
      PersistenceType aPersistenceType, const OriginMetadata& aOriginMetadata,
      Client::Type aClientType, nsIFile* aFile, int64_t aFileSize = -1,
      int64_t* aFileSizeOut = nullptr);

  already_AddRefed<QuotaObject> GetQuotaObject(
      PersistenceType aPersistenceType, const OriginMetadata& aOriginMetadata,
      Client::Type aClientType, const nsAString& aPath, int64_t aFileSize = -1,
      int64_t* aFileSizeOut = nullptr);

  already_AddRefed<QuotaObject> GetQuotaObject(const int64_t aDirectoryLockId,
                                               const nsAString& aPath);

  Nullable<bool> OriginPersisted(const OriginMetadata& aOriginMetadata);

  void PersistOrigin(const OriginMetadata& aOriginMetadata);

  using DirectoryLockIdTableArray =
      AutoTArray<Client::DirectoryLockIdTable, Client::TYPE_MAX>;
  void AbortOperationsForLocks(const DirectoryLockIdTableArray& aLockIds);

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

  Result<nsCOMPtr<nsIFile>, nsresult> GetDirectoryForOrigin(
      PersistenceType aPersistenceType, const nsACString& aASCIIOrigin) const;

  nsresult RestoreDirectoryMetadata2(nsIFile* aDirectory);

  // XXX Remove aPersistenceType argument once the persistence type is stored
  // in the metadata file.
  Result<FullOriginMetadata, nsresult> LoadFullOriginMetadata(
      nsIFile* aDirectory, PersistenceType aPersistenceType);

  Result<FullOriginMetadata, nsresult> LoadFullOriginMetadataWithRestore(
      nsIFile* aDirectory);

  // 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.
  RefPtr<ClientDirectoryLock> CreateDirectoryLock(
      PersistenceType aPersistenceType, const OriginMetadata& aOriginMetadata,
      Client::Type aClientType, bool aExclusive);

  // XXX RemoveMe once bug 1170279 gets fixed.
  RefPtr<UniversalDirectoryLock> CreateDirectoryLockInternal(
      const Nullable<PersistenceType>& aPersistenceType,
      const OriginScope& aOriginScope,
      const Nullable<Client::Type>& aClientType, bool aExclusive);

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

  /**
   * Helper method to invoke the provided predicate on all "pending" OriginInfo
   * instances. These are origins for which the origin directory has not yet
   * been created but for which quota is already being tracked. This happens,
   * for example, for the LocalStorage client where an origin that previously
   * was not using LocalStorage can start issuing writes which it buffers until
   * eventually flushing them. We defer creating the origin directory for as
   * long as possible in that case, so the directory won't exist. Logic that
   * would otherwise only consult the filesystem also needs to use this method.
   */
  template <typename P>
  void CollectPendingOriginsForListing(P aPredicate);

  bool IsStorageInitialized() const {
    AssertIsOnIOThread();
    return static_cast<bool>(mStorageConnection);
  }

  void AssertStorageIsInitialized() const
#ifdef DEBUG
      ;
#else
  {
  }
#endif

  nsresult EnsureStorageIsInitialized();

  // Returns a pair of an nsIFile object referring to the directory, and a bool
  // indicating whether the directory was newly created.
  Result<std::pair<nsCOMPtr<nsIFile>, bool>, nsresult>
  EnsurePersistentOriginIsInitialized(const OriginMetadata& aOriginMetadata);

  // Returns a pair of an nsIFile object referring to the directory, and a bool
  // indicating whether the directory was newly created.
  Result<std::pair<nsCOMPtr<nsIFile>, bool>, nsresult>
  EnsureTemporaryOriginIsInitialized(PersistenceType aPersistenceType,
                                     const OriginMetadata& aOriginMetadata);

  nsresult EnsureTemporaryStorageIsInitialized();

  void ShutdownStorage();

  // Returns a bool indicating whether the directory was newly created.
  Result<bool, nsresult> EnsureOriginDirectory(nsIFile& aDirectory);

  nsresult AboutToClearOrigins(
      const Nullable<PersistenceType>& aPersistenceType,
      const OriginScope& aOriginScope,
      const Nullable<Client::Type>& aClientType);

  void OriginClearCompleted(PersistenceType aPersistenceType,
                            const nsACString& aOrigin,
                            const Nullable<Client::Type>& aClientType);

  void StartIdleMaintenance() {
    AssertIsOnOwningThread();

    for (const auto& client : *mClients) {
      client->StartIdleMaintenance();
    }
  }

  void StopIdleMaintenance() {
    AssertIsOnOwningThread();

    for (const auto& client : *mClients) {
      client->StopIdleMaintenance();
    }
  }

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

  nsIThread* IOThread() { return mIOThread->get(); }

  Client* GetClient(Client::Type aClientType);

  const AutoTArray<Client::Type, Client::TYPE_MAX>& AllClientTypes();

  const nsString& GetBasePath() const { return mBasePath; }

  const nsString& GetStorageName() const { return mStorageName; }

  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;

  std::pair<uint64_t, uint64_t> GetUsageAndLimitForEstimate(
      const OriginMetadata& aOriginMetadata);

  uint64_t GetOriginUsage(const PrincipalMetadata& aPrincipalMetadata);

  Maybe<FullOriginMetadata> GetFullOriginMetadata(
      const OriginMetadata& aOriginMetadata);

  void NotifyStoragePressure(uint64_t aUsage);

  // Record a quota client shutdown step, if shutting down.
  // Assumes that the QuotaManager singleton is alive.
  static void MaybeRecordQuotaClientShutdownStep(
      const Client::Type aClientType, const nsACString& aStepDescription);

  // Record a quota client shutdown step, if shutting down.
  // Checks if the QuotaManager singleton is alive.
  static void SafeMaybeRecordQuotaClientShutdownStep(
      Client::Type aClientType, const nsACString& aStepDescription);

  // Record a quota manager shutdown step, use only if shutdown is active.
  void RecordQuotaManagerShutdownStep(const nsACString& aStepDescription);

  // Record a quota manager shutdown step, if shutting down.
  void MaybeRecordQuotaManagerShutdownStep(const nsACString& aStepDescription);

  template <typename F>
  void MaybeRecordQuotaManagerShutdownStepWith(F&& aFunc);

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

  static bool IsPrincipalInfoValid(const PrincipalInfo& aPrincipalInfo);

  static PrincipalMetadata GetInfoFromValidatedPrincipalInfo(
      const PrincipalInfo& aPrincipalInfo);

  static nsAutoCString GetOriginFromValidatedPrincipalInfo(
      const PrincipalInfo& aPrincipalInfo);

  static Result<PrincipalMetadata, nsresult> GetInfoFromPrincipal(
      nsIPrincipal* aPrincipal);

  static Result<nsAutoCString, nsresult> GetOriginFromPrincipal(
      nsIPrincipal* aPrincipal);

  static Result<nsAutoCString, nsresult> GetOriginFromWindow(
      nsPIDOMWindowOuter* aWindow);

  static nsLiteralCString GetOriginForChrome();

  static PrincipalMetadata GetInfoForChrome();

  static bool IsOriginInternal(const nsACString& aOrigin);

  static bool AreOriginsEqualOnDisk(const nsACString& aOrigin1,
                                    const nsACString& aOrigin2);

  static Result<PrincipalInfo, nsresult> ParseOrigin(const nsACString& aOrigin);

  static void InvalidateQuotaCache();

 private:
  virtual ~QuotaManager();

  nsresult Init();

  void Shutdown();

  void RegisterDirectoryLock(DirectoryLockImpl& aLock);

  void UnregisterDirectoryLock(DirectoryLockImpl& aLock);

  void AddPendingDirectoryLock(DirectoryLockImpl& aLock);

  void RemovePendingDirectoryLock(DirectoryLockImpl& aLock);

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

  void LockedRemoveQuotaForOrigin(PersistenceType aPersistenceType,
                                  const OriginMetadata& aOriginMetadata);

  already_AddRefed<GroupInfo> LockedGetOrCreateGroupInfo(
      PersistenceType aPersistenceType, const nsACString& aSuffix,
      const nsACString& aGroup);

  already_AddRefed<OriginInfo> LockedGetOriginInfo(
      PersistenceType aPersistenceType, const OriginMetadata& aOriginMetadata);

  nsresult UpgradeFromIndexedDBDirectoryToPersistentStorageDirectory(
      nsIFile* aIndexedDBDir);

  nsresult UpgradeFromPersistentStorageDirectoryToDefaultStorageDirectory(
      nsIFile* aPersistentStorageDir);

  nsresult MaybeUpgradeToDefaultStorageDirectory(nsIFile& aStorageFile);

  template <typename Helper>
  nsresult UpgradeStorage(const int32_t aOldVersion, const int32_t aNewVersion,
                          mozIStorageConnection* aConnection);

  nsresult UpgradeStorageFrom0_0To1_0(mozIStorageConnection* aConnection);

  nsresult UpgradeStorageFrom1_0To2_0(mozIStorageConnection* aConnection);

  nsresult UpgradeStorageFrom2_0To2_1(mozIStorageConnection* aConnection);

  nsresult UpgradeStorageFrom2_1To2_2(mozIStorageConnection* aConnection);

  nsresult UpgradeStorageFrom2_2To2_3(mozIStorageConnection* aConnection);

  nsresult MaybeCreateOrUpgradeStorage(mozIStorageConnection& aConnection);

  OkOrErr MaybeRemoveLocalStorageArchiveTmpFile();

  nsresult MaybeRemoveLocalStorageDataAndArchive(nsIFile& aLsArchiveFile);

  nsresult MaybeRemoveLocalStorageDirectories();

  Result<Ok, nsresult> CopyLocalStorageArchiveFromWebAppsStore(
      nsIFile& aLsArchiveFile) const;

  Result<nsCOMPtr<mozIStorageConnection>, nsresult>
  CreateLocalStorageArchiveConnection(nsIFile& aLsArchiveFile) const;

  Result<nsCOMPtr<mozIStorageConnection>, nsresult>
  RecopyLocalStorageArchiveFromWebAppsStore(nsIFile& aLsArchiveFile);

  Result<nsCOMPtr<mozIStorageConnection>, nsresult>
  DowngradeLocalStorageArchive(nsIFile& aLsArchiveFile);

  Result<nsCOMPtr<mozIStorageConnection>, nsresult>
  UpgradeLocalStorageArchiveFromLessThan4To4(nsIFile& aLsArchiveFile);

  /*
  nsresult UpgradeLocalStorageArchiveFrom4To5();
  */

  Result<Ok, nsresult> MaybeCreateOrUpgradeLocalStorageArchive(
      nsIFile& aLsArchiveFile);

  Result<Ok, nsresult> CreateEmptyLocalStorageArchive(
      nsIFile& aLsArchiveFile) const;

  template <typename OriginFunc>
  nsresult InitializeRepository(PersistenceType aPersistenceType,
                                OriginFunc&& aOriginFunc);

  nsresult InitializeOrigin(PersistenceType aPersistenceType,
                            const OriginMetadata& aOriginMetadata,
                            int64_t aAccessTime, bool aPersisted,
                            nsIFile* aDirectory);

  using OriginInfosFlatTraversable =
      nsTArray<NotNull<RefPtr<const OriginInfo>>>;

  using OriginInfosNestedTraversable =
      nsTArray<nsTArray<NotNull<RefPtr<const OriginInfo>>>>;

  OriginInfosNestedTraversable GetOriginInfosExceedingGroupLimit() const;

  OriginInfosNestedTraversable GetOriginInfosExceedingGlobalLimit() const;

  void ClearOrigins(const OriginInfosNestedTraversable& aDoomedOriginInfos);

  void CleanupTemporaryStorage();

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

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

  Result<Ok, nsresult> ArchiveOrigins(
      const nsTArray<FullOriginMetadata>& aFullOriginMetadatas);

  void ReleaseIOThreadObjects() {
    AssertIsOnIOThread();

    for (Client::Type type : AllClientTypes()) {
      (*mClients)[type]->ReleaseIOThreadObjects();
    }
  }

  DirectoryLockTable& GetDirectoryLockTable(PersistenceType aPersistenceType);

  bool IsSanitizedOriginValid(const nsACString& aSanitizedOrigin);

  int64_t GenerateDirectoryLockId();

  bool ShutdownStarted() const;

  void RecordShutdownStep(Maybe<Client::Type> aClientType,
                          const nsACString& aStepDescription);

  template <typename Func>
  auto ExecuteInitialization(Initialization aInitialization, Func&& aFunc)
      -> std::invoke_result_t<Func, const FirstInitializationAttempt<
                                        Initialization, StringGenerator>&>;

  template <typename Func>
  auto ExecuteInitialization(Initialization aInitialization,
                             const nsACString& aContext, Func&& aFunc)
      -> std::invoke_result_t<Func, const FirstInitializationAttempt<
                                        Initialization, StringGenerator>&>;

  template <typename Func>
  auto ExecuteOriginInitialization(const nsACString& aOrigin,
                                   const OriginInitialization aInitialization,
                                   const nsACString& aContext, Func&& aFunc)
      -> std::invoke_result_t<Func, const FirstInitializationAttempt<
                                        Initialization, StringGenerator>&>;

  template <typename Iterator>
  static void MaybeInsertNonPersistedOriginInfos(
      Iterator aDest, const RefPtr<GroupInfo>& aTemporaryGroupInfo,
      const RefPtr<GroupInfo>& aDefaultGroupInfo);

  template <typename Collect, typename Pred>
  static OriginInfosFlatTraversable CollectLRUOriginInfosUntil(
      Collect&& aCollect, Pred&& aPred);

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

  nsCOMPtr<mozIStorageConnection> mStorageConnection;

  EnumeratedArray<Client::Type, Client::TYPE_MAX, nsCString> mShutdownSteps;
  LazyInitializedOnce<const TimeStamp> mShutdownStartedAt;
  Atomic<bool> mShutdownStarted;

  // Accesses to mQuotaManagerShutdownSteps must be protected by mQuotaMutex.
  nsCString mQuotaManagerShutdownSteps;

  mutable mozilla::Mutex mQuotaMutex MOZ_UNANNOTATED;

  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. It can be
  // accessed on the owning (PBackground) thread only.
  nsTArray<NotNull<DirectoryLockImpl*>> mDirectoryLocks;

  // Only modifed on the owning thread, but read on multiple threads. Therefore
  // all modifications (including those on the owning thread) and all reads off
  // the owning thread must be protected by mQuotaMutex. In other words, only
  // reads on the owning thread don't have to be protected by mQuotaMutex.
  nsTHashMap<nsUint64HashKey, NotNull<DirectoryLockImpl*>>
      mDirectoryLockIdTable;

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

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

  // A hash table that is used to cache origin parser results for given
  // sanitized origin strings. This hash table isn't protected by any mutex but
  // it is only ever touched on the IO thread.
  nsTHashMap<nsCStringHashKey, bool> mValidOrigins;

  // This array is populated at initialization time and then never modified, so
  // it can be iterated on any thread.
  LazyInitializedOnce<const AutoTArray<RefPtr<Client>, Client::TYPE_MAX>>
      mClients;

  using ClientTypesArray = AutoTArray<Client::Type, Client::TYPE_MAX>;
  LazyInitializedOnce<const ClientTypesArray> mAllClientTypes;
  LazyInitializedOnce<const ClientTypesArray> mAllClientTypesExceptLS;

  // This object isn't protected by any mutex but it is only ever touched on
  // the IO thread.
  InitializationInfo mInitializationInfo;

  const nsString mBasePath;
  const nsString mStorageName;
  LazyInitializedOnce<const nsString> mIndexedDBPath;
  LazyInitializedOnce<const nsString> mStoragePath;
  LazyInitializedOnce<const nsString> mStorageArchivesPath;
  LazyInitializedOnce<const nsString> mPermanentStoragePath;
  LazyInitializedOnce<const nsString> mTemporaryStoragePath;
  LazyInitializedOnce<const nsString> mDefaultStoragePath;

  uint64_t mTemporaryStorageLimit;
  uint64_t mTemporaryStorageUsage;
  int64_t mNextDirectoryLockId;
  bool mTemporaryStorageInitialized;
  bool mCacheUsable;
};

}  // namespace mozilla::dom::quota

#endif /* mozilla_dom_quota_quotamanager_h__ */