tenfourfox/dom/quota/QuotaManager.h
Cameron Kaiser c9b2922b70 hello FPR
2017-04-19 00:56:45 -07:00

521 lines
14 KiB
C++

/* -*- 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 "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 nsIEventTarget;
class nsIPrincipal;
class nsIThread;
class nsITimer;
class nsIURI;
class nsPIDOMWindow;
class nsIRunnable;
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;
};
class DirectoryLock
: public RefCountedObject
{
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 BackgroundThreadObject
{
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:
class CreateRunnable;
private:
class ShutdownRunnable;
class ShutdownObserver;
public:
NS_INLINE_DECL_REFCOUNTING(QuotaManager)
static const bool kRunningXPCShellTests;
static const char kReplaceChars[];
static void
GetOrCreate(nsIRunnable* aCallback);
// Returns a non-owning reference.
static QuotaManager*
Get();
// 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
StartIdleMaintenance()
{
AssertIsOnOwningThread();
for (auto& client : mClients) {
client->StartIdleMaintenance();
}
}
void
StopIdleMaintenance()
{
AssertIsOnOwningThread();
for (auto& client : mClients) {
client->StopIdleMaintenance();
}
}
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(const nsAString& aBaseDirPath);
void
Shutdown();
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);
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 void
ShutdownTimerCallback(nsITimer* aTimer, void* aClosure);
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__ */