Source code
Revision control
Copy as Markdown
Other Tools
/* -*- 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
#include "QuotaClientImpl.h"
#include "DBAction.h"
#include "FileUtilsImpl.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/ResultExtensions.h"
#include "mozilla/Telemetry.h"
#include "mozilla/Unused.h"
#include "mozilla/dom/cache/DBSchema.h"
#include "mozilla/dom/cache/Manager.h"
#include "mozilla/dom/quota/PersistenceType.h"
#include "mozilla/dom/quota/QuotaCommon.h"
#include "mozilla/dom/quota/QuotaManager.h"
#include "mozilla/dom/quota/UsageInfo.h"
#include "mozilla/ipc/BackgroundParent.h"
#include "nsIFile.h"
#include "nsThreadUtils.h"
namespace mozilla::dom::cache {
using mozilla::dom::quota::AssertIsOnIOThread;
using mozilla::dom::quota::Client;
using mozilla::dom::quota::CloneFileAndAppend;
using mozilla::dom::quota::DatabaseUsageType;
using mozilla::dom::quota::GetDirEntryKind;
using mozilla::dom::quota::nsIFileKind;
using mozilla::dom::quota::OriginMetadata;
using mozilla::dom::quota::PrincipalMetadata;
using mozilla::dom::quota::QuotaManager;
using mozilla::dom::quota::UsageInfo;
using mozilla::ipc::AssertIsOnBackgroundThread;
namespace {
template <typename StepFunc>
Result<UsageInfo, nsresult> ReduceUsageInfo(nsIFile& aDir,
const Atomic<bool>& aCanceled,
const StepFunc& aStepFunc) {
QM_TRY_RETURN(quota::ReduceEachFileAtomicCancelable(
aDir, aCanceled, UsageInfo{},
[&aStepFunc](UsageInfo usageInfo, const nsCOMPtr<nsIFile>& bodyDir)
-> Result<UsageInfo, nsresult> {
QM_TRY(OkIf(!QuotaManager::IsShuttingDown()).mapErr([](const auto&) {
return NS_ERROR_ABORT;
}));
QM_TRY_INSPECT(const auto& stepUsageInfo, aStepFunc(bodyDir));
return usageInfo + stepUsageInfo;
}));
}
Result<int64_t, nsresult> GetPaddingSizeFromDB(
nsIFile& aDir, nsIFile& aDBFile, const OriginMetadata& aOriginMetadata,
const Maybe<CipherKey>& aMaybeCipherKey) {
CacheDirectoryMetadata directoryMetadata(aOriginMetadata);
// directoryMetadata.mDirectoryLockId must be -1 (which is default for new
// CacheDirectoryMetadata) because this method should only be called from
// QuotaClient::InitOrigin when the temporary storage hasn't been initialized
// yet. At that time, the in-memory objects (e.g. OriginInfo) are only being
// created so it doesn't make sense to tunnel quota information to QuotaVFS
// to get corresponding QuotaObject instance for the SQLite file).
MOZ_DIAGNOSTIC_ASSERT(directoryMetadata.mDirectoryLockId == -1);
#ifdef DEBUG
{
QM_TRY_INSPECT(const bool& exists,
MOZ_TO_RESULT_INVOKE_MEMBER(aDBFile, Exists));
MOZ_ASSERT(exists);
}
#endif
QM_TRY_INSPECT(const auto& conn,
OpenDBConnection(directoryMetadata, aDBFile, aMaybeCipherKey));
// Make sure that the database has the latest schema before we try to read
// from it. We have to do this because GetPaddingSizeFromDB is called
// by InitOrigin. And it means that SetupAction::RunSyncWithDBOnTarget hasn't
// checked the schema for the given origin yet).
QM_TRY(MOZ_TO_RESULT(db::CreateOrMigrateSchema(aDir, *conn)));
QM_TRY_RETURN(DirectoryPaddingRestore(aDir, *conn,
/* aMustRestore */ false));
}
Result<int64_t, nsresult> GetTotalDiskUsageFromDB(
nsIFile& aDir, nsIFile& aDBFile, const OriginMetadata& aOriginMetadata,
const Maybe<CipherKey>& aMaybeCipherKey) {
CacheDirectoryMetadata directoryMetadata(aOriginMetadata);
// directoryMetadata.mDirectoryLockId must be -1 (which is default for new
// CacheDirectoryMetadata) because this method should only be called from
// QuotaClient::InitOrigin when the temporary storage hasn't been initialized
// yet. At that time, the in-memory objects (e.g. OriginInfo) are only being
// created so it doesn't make sense to tunnel quota information to QuotaVFS
// to get corresponding QuotaObject instance for the SQLite file).
MOZ_DIAGNOSTIC_ASSERT(directoryMetadata.mDirectoryLockId == -1);
#ifdef DEBUG
{
QM_TRY_INSPECT(const bool& exists,
MOZ_TO_RESULT_INVOKE_MEMBER(aDBFile, Exists));
MOZ_ASSERT(exists);
}
#endif
QM_TRY_INSPECT(const auto& conn,
OpenDBConnection(directoryMetadata, aDBFile, aMaybeCipherKey));
// Make sure that the database has the latest schema before we try to read
// from it. We have to do this because GetTotalDiskUsageFromDB is called
// by InitOrigin. And it means that SetupAction::RunSyncWithDBOnTarget hasn't
// checked the schema for the given origin yet).
QM_TRY(MOZ_TO_RESULT(db::CreateOrMigrateSchema(aDir, *conn)));
QM_TRY_RETURN(db::GetTotalDiskUsage(*conn));
}
} // namespace
const nsLiteralString kCachesSQLiteFilename = u"caches.sqlite"_ns;
const nsLiteralString kMorgueDirectoryFilename = u"morgue"_ns;
CacheQuotaClient::CacheQuotaClient() {
AssertIsOnBackgroundThread();
MOZ_DIAGNOSTIC_ASSERT(!sInstance);
sInstance = this;
}
// static
CacheQuotaClient* CacheQuotaClient::Get() {
MOZ_DIAGNOSTIC_ASSERT(sInstance);
return sInstance;
}
CacheQuotaClient::Type CacheQuotaClient::GetType() { return DOMCACHE; }
Result<UsageInfo, nsresult> CacheQuotaClient::InitOrigin(
PersistenceType aPersistenceType, const OriginMetadata& aOriginMetadata,
const AtomicBool& aCanceled) {
AssertIsOnIOThread();
MOZ_ASSERT(aOriginMetadata.mPersistenceType == aPersistenceType);
QuotaManager* const qm = QuotaManager::Get();
MOZ_DIAGNOSTIC_ASSERT(qm);
QM_TRY_INSPECT(const auto& dir, qm->GetOriginDirectory(aOriginMetadata));
QM_TRY(MOZ_TO_RESULT(
dir->Append(NS_LITERAL_STRING_FROM_CSTRING(DOMCACHE_DIRECTORY_NAME))));
QM_TRY_INSPECT(
const auto& cachesSQLiteFile,
([dir]() -> Result<nsCOMPtr<nsIFile>, nsresult> {
QM_TRY_INSPECT(const auto& cachesSQLite,
CloneFileAndAppend(*dir, kCachesSQLiteFilename));
// IsDirectory is used to check if caches.sqlite exists or not. Another
// benefit of this is that we can test the failed cases by creating a
// directory named "caches.sqlite".
QM_TRY_INSPECT(const auto& dirEntryKind,
GetDirEntryKind(*cachesSQLite));
if (dirEntryKind == nsIFileKind::DoesNotExist) {
// We only ensure padding files and morgue directory get removed like
// WipeDatabase in DBAction.cpp. The -wal journal file will be
// automatically deleted by sqlite when the new database is created.
// XXX Ideally, we would delete the -wal journal file as well (here
// and also in WipeDatabase).
// XXX We should have something like WipeDatabaseNoQuota for this.
// XXX Long term, we might even think about removing entire origin
// directory because missing caches.sqlite while other files exist can
// be interpreted as database corruption.
QM_TRY(MOZ_TO_RESULT(mozilla::dom::cache::DirectoryPaddingDeleteFile(
*dir, DirPaddingFile::TMP_FILE)));
QM_TRY(MOZ_TO_RESULT(mozilla::dom::cache::DirectoryPaddingDeleteFile(
*dir, DirPaddingFile::FILE)));
QM_TRY_INSPECT(const auto& morgueDir,
CloneFileAndAppend(*dir, kMorgueDirectoryFilename));
QM_TRY(MOZ_TO_RESULT(mozilla::dom::cache::RemoveNsIFileRecursively(
Nothing(), *morgueDir,
/* aTrackQuota */ false)));
return nsCOMPtr<nsIFile>{nullptr};
}
QM_TRY(OkIf(dirEntryKind == nsIFileKind::ExistsAsFile),
Err(NS_ERROR_FAILURE));
return cachesSQLite;
}()));
// If the caches.sqlite doesn't exist, then padding files and morgue directory
// should have been removed if they existed. We ignore the rest of known files
// because we assume that they will be removed when a new database is created.
// XXX Ensure the -wel file is removed if the caches.sqlite doesn't exist.
QM_TRY(OkIf(!!cachesSQLiteFile), UsageInfo{});
const auto maybeCipherKey = [this, &aOriginMetadata] {
Maybe<CipherKey> maybeCipherKey;
auto cipherKeyManager = GetOrCreateCipherKeyManager(aOriginMetadata);
if (cipherKeyManager) {
maybeCipherKey = Some(cipherKeyManager->Ensure());
}
return maybeCipherKey;
}();
QM_TRY_INSPECT(
const auto& paddingSize,
([dir, cachesSQLiteFile, &aOriginMetadata,
&maybeCipherKey]() -> Result<int64_t, nsresult> {
if (!DirectoryPaddingFileExists(*dir, DirPaddingFile::TMP_FILE)) {
QM_WARNONLY_TRY_UNWRAP(const auto maybePaddingSize,
DirectoryPaddingGet(*dir));
if (maybePaddingSize) {
return maybePaddingSize.ref();
}
}
// If the temporary file still exists or failing to get the padding size
// from the padding file, then we need to get the padding size from the
// database and restore the padding file.
QM_TRY_RETURN(GetPaddingSizeFromDB(*dir, *cachesSQLiteFile,
aOriginMetadata, maybeCipherKey));
}()));
QM_TRY_INSPECT(const auto& totalDiskUsage,
GetTotalDiskUsageFromDB(*dir, *cachesSQLiteFile,
aOriginMetadata, maybeCipherKey));
QM_TRY_INSPECT(
const auto& innerUsageInfo,
ReduceUsageInfo(
*dir, aCanceled,
[](const nsCOMPtr<nsIFile>& file) -> Result<UsageInfo, nsresult> {
QM_TRY_INSPECT(const auto& leafName,
MOZ_TO_RESULT_INVOKE_MEMBER_TYPED(nsAutoString, file,
GetLeafName));
QM_TRY_INSPECT(const auto& dirEntryKind, GetDirEntryKind(*file));
switch (dirEntryKind) {
case nsIFileKind::ExistsAsDirectory:
if (!leafName.EqualsLiteral("morgue")) {
NS_WARNING("Unknown Cache directory found!");
}
break;
case nsIFileKind::ExistsAsFile:
// Ignore transient sqlite files and marker files
if (leafName.EqualsLiteral("caches.sqlite-journal") ||
leafName.EqualsLiteral("caches.sqlite-shm") ||
StringBeginsWith(leafName, u"caches.sqlite-mj"_ns) ||
leafName.EqualsLiteral("context_open.marker")) {
break;
}
if (leafName.Equals(kCachesSQLiteFilename) ||
leafName.EqualsLiteral("caches.sqlite-wal")) {
QM_TRY_INSPECT(
const int64_t& fileSize,
MOZ_TO_RESULT_INVOKE_MEMBER(file, GetFileSize));
MOZ_DIAGNOSTIC_ASSERT(fileSize >= 0);
return UsageInfo{DatabaseUsageType(Some(fileSize))};
}
// Ignore directory padding file
if (leafName.EqualsLiteral(PADDING_FILE_NAME) ||
leafName.EqualsLiteral(PADDING_TMP_FILE_NAME)) {
break;
}
NS_WARNING("Unknown Cache file found!");
break;
case nsIFileKind::DoesNotExist:
// Ignore files that got removed externally while iterating.
break;
}
return UsageInfo{};
}));
// FIXME: Separate file usage and database usage in OriginInfo so that the
// workaround for treating padding file size as database usage can be removed.
return UsageInfo{DatabaseUsageType(Some(paddingSize))} +
UsageInfo{DatabaseUsageType(Some(totalDiskUsage))} + innerUsageInfo;
}
nsresult CacheQuotaClient::InitOriginWithoutTracking(
PersistenceType aPersistenceType, const OriginMetadata& aOriginMetadata,
const AtomicBool& aCanceled) {
AssertIsOnIOThread();
// This is called when a storage/permanent/${origin}/cache directory exists.
// Even though this shouldn't happen with a "good" profile, we shouldn't
// return an error here, since that would cause origin initialization to fail.
// We just warn and otherwise ignore that.
UNKNOWN_FILE_WARNING(NS_LITERAL_STRING_FROM_CSTRING(DOMCACHE_DIRECTORY_NAME));
return NS_OK;
}
Result<UsageInfo, nsresult> CacheQuotaClient::GetUsageForOrigin(
PersistenceType aPersistenceType, const OriginMetadata& aOriginMetadata,
const AtomicBool& aCanceled) {
AssertIsOnIOThread();
// We can't open the database at this point, since it can be already used by
// the Cache IO thread. Use the cached value instead.
QuotaManager* quotaManager = QuotaManager::Get();
MOZ_ASSERT(quotaManager);
return quotaManager->GetUsageForClient(aOriginMetadata.mPersistenceType,
aOriginMetadata, Client::DOMCACHE);
}
void CacheQuotaClient::OnOriginClearCompleted(PersistenceType aPersistenceType,
const nsACString& aOrigin) {
AssertIsOnIOThread();
if (aPersistenceType == quota::PERSISTENCE_TYPE_PRIVATE) {
if (auto entry = mCipherKeyManagers.Lookup(aOrigin)) {
entry.Data()->Invalidate();
entry.Remove();
}
}
}
void CacheQuotaClient::OnRepositoryClearCompleted(
PersistenceType aPersistenceType) {
AssertIsOnIOThread();
if (aPersistenceType == quota::PERSISTENCE_TYPE_PRIVATE) {
for (const auto& cipherKeyManager : mCipherKeyManagers.Values()) {
cipherKeyManager->Invalidate();
}
mCipherKeyManagers.Clear();
}
}
void CacheQuotaClient::ReleaseIOThreadObjects() {
// Nothing to do here as the Context handles cleaning everything up
// automatically.
}
void CacheQuotaClient::AbortOperationsForLocks(
const DirectoryLockIdTable& aDirectoryLockIds) {
AssertIsOnBackgroundThread();
Manager::Abort(aDirectoryLockIds);
}
void CacheQuotaClient::AbortOperationsForProcess(
ContentParentId aContentParentId) {
// The Cache and Context can be shared by multiple client processes. They
// are not exclusively owned by a single process.
//
// As far as I can tell this is used by QuotaManager to abort operations
// when a particular process goes away. We definitely don't want this
// since we are shared. Also, the Cache actor code already properly
// handles asynchronous actor destruction when the child process dies.
//
// Therefore, do nothing here.
}
void CacheQuotaClient::AbortAllOperations() {
AssertIsOnBackgroundThread();
Manager::AbortAll();
}
void CacheQuotaClient::StartIdleMaintenance() {}
void CacheQuotaClient::StopIdleMaintenance() {}
void CacheQuotaClient::InitiateShutdown() {
AssertIsOnBackgroundThread();
Manager::InitiateShutdown();
}
bool CacheQuotaClient::IsShutdownCompleted() const {
AssertIsOnBackgroundThread();
return Manager::IsShutdownAllComplete();
}
void CacheQuotaClient::ForceKillActors() {
// Currently we don't implement killing actors (are there any to kill here?).
}
nsCString CacheQuotaClient::GetShutdownStatus() const {
AssertIsOnBackgroundThread();
return Manager::GetShutdownStatus();
}
void CacheQuotaClient::FinalizeShutdown() {
// Nothing to do here.
}
nsresult CacheQuotaClient::UpgradeStorageFrom2_0To2_1(nsIFile* aDirectory) {
AssertIsOnIOThread();
MOZ_DIAGNOSTIC_ASSERT(aDirectory);
QM_TRY(MOZ_TO_RESULT(DirectoryPaddingInit(*aDirectory)));
return NS_OK;
}
nsresult CacheQuotaClient::RestorePaddingFileInternal(
nsIFile* aBaseDir, mozIStorageConnection* aConn) {
MOZ_ASSERT(!NS_IsMainThread());
MOZ_DIAGNOSTIC_ASSERT(aBaseDir);
MOZ_DIAGNOSTIC_ASSERT(aConn);
QM_TRY_INSPECT(const int64_t& dummyPaddingSize,
DirectoryPaddingRestore(*aBaseDir, *aConn,
/* aMustRestore */ true));
Unused << dummyPaddingSize;
return NS_OK;
}
nsresult CacheQuotaClient::WipePaddingFileInternal(
const CacheDirectoryMetadata& aDirectoryMetadata, nsIFile* aBaseDir) {
MOZ_ASSERT(!NS_IsMainThread());
MOZ_DIAGNOSTIC_ASSERT(aBaseDir);
MOZ_ASSERT(DirectoryPaddingFileExists(*aBaseDir, DirPaddingFile::FILE));
QM_TRY_INSPECT(
const int64_t& paddingSize, ([&aBaseDir]() -> Result<int64_t, nsresult> {
const bool temporaryPaddingFileExist =
DirectoryPaddingFileExists(*aBaseDir, DirPaddingFile::TMP_FILE);
Maybe<int64_t> directoryPaddingGetResult;
if (!temporaryPaddingFileExist) {
QM_TRY_UNWRAP(directoryPaddingGetResult,
([&aBaseDir]() -> Result<Maybe<int64_t>, nsresult> {
QM_TRY_RETURN(
DirectoryPaddingGet(*aBaseDir).map(Some<int64_t>),
Maybe<int64_t>{});
}()));
}
if (temporaryPaddingFileExist || !directoryPaddingGetResult) {
// XXXtt: Maybe have a method in the QuotaManager to clean the usage
// under the quota client and the origin. There is nothing we can do
// to recover the file.
NS_WARNING("Cannnot read padding size from file!");
return 0;
}
return *directoryPaddingGetResult;
}()));
if (paddingSize > 0) {
DecreaseUsageForDirectoryMetadata(aDirectoryMetadata, paddingSize);
}
QM_TRY(MOZ_TO_RESULT(
DirectoryPaddingDeleteFile(*aBaseDir, DirPaddingFile::FILE)));
// Remove temporary file if we have one.
QM_TRY(MOZ_TO_RESULT(
DirectoryPaddingDeleteFile(*aBaseDir, DirPaddingFile::TMP_FILE)));
QM_TRY(MOZ_TO_RESULT(DirectoryPaddingInit(*aBaseDir)));
return NS_OK;
}
RefPtr<CipherKeyManager> CacheQuotaClient::GetOrCreateCipherKeyManager(
const PrincipalMetadata& aMetadata) {
AssertIsOnIOThread();
auto privateOrigin = aMetadata.mIsPrivate;
if (!privateOrigin) {
return nullptr;
}
const auto& origin = aMetadata.mOrigin;
return mCipherKeyManagers.LookupOrInsertWith(
origin, [] { return new CipherKeyManager("CacheCipherKeyManager"); });
}
CacheQuotaClient::~CacheQuotaClient() {
AssertIsOnBackgroundThread();
MOZ_DIAGNOSTIC_ASSERT(sInstance == this);
sInstance = nullptr;
}
// static
CacheQuotaClient* CacheQuotaClient::sInstance = nullptr;
// static
already_AddRefed<quota::Client> CreateQuotaClient() {
AssertIsOnBackgroundThread();
RefPtr<CacheQuotaClient> ref = new CacheQuotaClient();
return ref.forget();
}
// static
nsresult RestorePaddingFile(nsIFile* aBaseDir, mozIStorageConnection* aConn) {
MOZ_ASSERT(!NS_IsMainThread());
MOZ_DIAGNOSTIC_ASSERT(aBaseDir);
MOZ_DIAGNOSTIC_ASSERT(aConn);
RefPtr<CacheQuotaClient> cacheQuotaClient = CacheQuotaClient::Get();
MOZ_DIAGNOSTIC_ASSERT(cacheQuotaClient);
QM_TRY(MOZ_TO_RESULT(
cacheQuotaClient->RestorePaddingFileInternal(aBaseDir, aConn)));
return NS_OK;
}
// static
nsresult WipePaddingFile(const CacheDirectoryMetadata& aDirectoryMetadata,
nsIFile* aBaseDir) {
MOZ_ASSERT(!NS_IsMainThread());
MOZ_DIAGNOSTIC_ASSERT(aBaseDir);
RefPtr<CacheQuotaClient> cacheQuotaClient = CacheQuotaClient::Get();
MOZ_DIAGNOSTIC_ASSERT(cacheQuotaClient);
QM_TRY(MOZ_TO_RESULT(
cacheQuotaClient->WipePaddingFileInternal(aDirectoryMetadata, aBaseDir)));
return NS_OK;
}
} // namespace mozilla::dom::cache