Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 541 insertions, 0 deletions

diff --git a/dom/cache/QuotaClient.cpp b/dom/cache/QuotaClient.cpp
new file mode 100644
index 0000000000..565450964f
--- /dev/null
+++ b/dom/cache/QuotaClient.cpp
@@ -0,0 +1,541 @@
+/* -*- 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/. */
+
+#include "QuotaClientImpl.h"
+
+#include "DBAction.h"
+#include "FileUtilsImpl.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/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::PERSISTENCE_TYPE_DEFAULT;
+using mozilla::dom::quota::PersistenceType;
+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()), Err(NS_ERROR_ABORT));
+
+        QM_TRY_INSPECT(const auto& stepUsageInfo, aStepFunc(bodyDir));
+
+        return usageInfo + stepUsageInfo;
+      }));
+}
+
+Result<UsageInfo, nsresult> GetBodyUsage(nsIFile& aMorgueDir,
+                                         const Atomic<bool>& aCanceled) {
+  AssertIsOnIOThread();
+
+  QM_TRY_RETURN(ReduceUsageInfo(
+      aMorgueDir, aCanceled,
+      [](const nsCOMPtr<nsIFile>& bodyDir) -> Result<UsageInfo, nsresult> {
+        QM_TRY_INSPECT(const auto& dirEntryKind, GetDirEntryKind(*bodyDir));
+
+        if (dirEntryKind != nsIFileKind::ExistsAsDirectory) {
+          if (dirEntryKind == nsIFileKind::ExistsAsFile) {
+            const DebugOnly<nsresult> result =
+                RemoveNsIFile(Nothing(), *bodyDir, /* aTrackQuota */ false);
+            // Try to remove the unexpected files, and keep moving on even if it
+            // fails because it might be created by virus or the operation
+            // system
+            MOZ_ASSERT(NS_SUCCEEDED(result));
+          }
+
+          return UsageInfo{};
+        }
+
+        UsageInfo usageInfo;
+        const auto getUsage =
+            [&usageInfo](nsIFile& bodyFile,
+                         const nsACString& leafName) -> Result<bool, nsresult> {
+          Unused << leafName;
+
+          QM_TRY_INSPECT(const int64_t& fileSize,
+                         MOZ_TO_RESULT_INVOKE_MEMBER(bodyFile, GetFileSize));
+          MOZ_DIAGNOSTIC_ASSERT(fileSize >= 0);
+          // FIXME: Separate file usage and database usage in OriginInfo so that
+          // the workaround for treating body file size as database usage can be
+          // removed.
+          //
+          // This is needed because we want to remove the mutex lock for padding
+          // files. The lock is needed because the padding file is accessed on
+          // the QM IO thread while getting origin usage and is accessed on the
+          // Cache IO thread in normal Cache operations. Using the cached usage
+          // in QM while getting origin usage can remove the access on the QM IO
+          // thread and thus we can remove the mutex lock. However, QM only
+          // separates usage types in initialization, and the separation is gone
+          // after that. So, before extending the separation of usage types in
+          // QM, this is a workaround to avoid the file usage mismatching in our
+          // tests. Note that file usage hasn't been exposed to users yet.
+          usageInfo += DatabaseUsageType(Some(fileSize));
+
+          return false;
+        };
+
+        // QM_OR_ELSE_WARN_IF is not used here since we just want to log
+        // NS_ERROR_FILE_FS_CORRUPTED result and not spam the reports (even a
+        // warning in the reports is not desired).
+        QM_TRY(QM_OR_ELSE_LOG_VERBOSE_IF(
+            // Expression.
+            MOZ_TO_RESULT(BodyTraverseFiles(Nothing(), *bodyDir, getUsage,
+                                            /* aCanRemoveFiles */ true,
+                                            /* aTrackQuota */ false)),
+            // Predicate.
+            IsSpecificError<NS_ERROR_FILE_FS_CORRUPTED>,
+            // Fallback. We treat NS_ERROR_FILE_FS_CORRUPTED as if the
+            // directory did not exist at all.
+            ErrToDefaultOk<>));
+        return usageInfo;
+      }));
+}
+
+Result<int64_t, nsresult> GetPaddingSizeFromDB(
+    nsIFile& aDir, nsIFile& aDBFile, const OriginMetadata& aOriginMetadata) {
+  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));
+
+  // 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(*conn)));
+
+  QM_TRY_RETURN(DirectoryPaddingRestore(aDir, *conn,
+                                        /* aMustRestore */ false));
+}
+
+}  // 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{});
+
+  QM_TRY_INSPECT(
+      const auto& paddingSize,
+      ([dir, cachesSQLiteFile,
+        &aOriginMetadata]() -> 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));
+      }()));
+
+  QM_TRY_INSPECT(
+      const auto& innerUsageInfo,
+      ReduceUsageInfo(
+          *dir, aCanceled,
+          [&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")) {
+                  QM_TRY_RETURN(GetBodyUsage(*file, aCanceled));
+                } else {
+                  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))} + 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(PERSISTENCE_TYPE_DEFAULT,
+                                         aOriginMetadata, Client::DOMCACHE);
+}
+
+void CacheQuotaClient::OnOriginClearCompleted(PersistenceType aPersistenceType,
+                                              const nsACString& aOrigin) {
+  // Nothing to do here.
+}
+
+void CacheQuotaClient::OnRepositoryClearCompleted(
+    PersistenceType aPersistenceType) {
+  AssertIsOnIOThread();
+
+  // Nothing to do here.
+}
+
+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;
+}
+
+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