Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

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

1 files changed, 2369 insertions, 0 deletions

diff --git a/netwerk/cache2/CacheStorageService.cpp b/netwerk/cache2/CacheStorageService.cpp
new file mode 100644
index 0000000000..cb34b64b27
--- /dev/null
+++ b/netwerk/cache2/CacheStorageService.cpp
@@ -0,0 +1,2369 @@
+/* -*- 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 "CacheLog.h"
+#include "CacheStorageService.h"
+#include "CacheFileIOManager.h"
+#include "CacheObserver.h"
+#include "CacheIndex.h"
+#include "CacheIndexIterator.h"
+#include "CacheStorage.h"
+#include "CacheEntry.h"
+#include "CacheFileUtils.h"
+
+#include "nsICacheStorageVisitor.h"
+#include "nsIObserverService.h"
+#include "nsIFile.h"
+#include "nsIURI.h"
+#include "nsINetworkPredictor.h"
+#include "nsCOMPtr.h"
+#include "nsContentUtils.h"
+#include "nsNetCID.h"
+#include "nsNetUtil.h"
+#include "nsServiceManagerUtils.h"
+#include "nsXULAppAPI.h"
+#include "mozilla/AtomicBitfields.h"
+#include "mozilla/TimeStamp.h"
+#include "mozilla/DebugOnly.h"
+#include "mozilla/Services.h"
+#include "mozilla/StoragePrincipalHelper.h"
+#include "mozilla/IntegerPrintfMacros.h"
+#include "mozilla/Telemetry.h"
+#include "mozilla/StaticPrefs_network.h"
+
+namespace mozilla::net {
+
+namespace {
+
+void AppendMemoryStorageTag(nsAutoCString& key) {
+  // Using DEL as the very last ascii-7 character we can use in the list of
+  // attributes
+  key.Append('\x7f');
+  key.Append(',');
+}
+
+}  // namespace
+
+// Not defining as static or class member of CacheStorageService since
+// it would otherwise need to include CacheEntry.h and that then would
+// need to be exported to make nsNetModule.cpp compilable.
+using GlobalEntryTables = nsClassHashtable<nsCStringHashKey, CacheEntryTable>;
+
+/**
+ * Keeps tables of entries.  There is one entries table for each distinct load
+ * context type.  The distinction is based on following load context info
+ * states: <isPrivate|isAnon|inIsolatedMozBrowser> which builds a mapping
+ * key.
+ *
+ * Thread-safe to access, protected by the service mutex.
+ */
+static GlobalEntryTables* sGlobalEntryTables;
+
+CacheMemoryConsumer::CacheMemoryConsumer(uint32_t aFlags) {
+  StoreFlags(aFlags);
+}
+
+void CacheMemoryConsumer::DoMemoryReport(uint32_t aCurrentSize) {
+  if (!(LoadFlags() & DONT_REPORT) && CacheStorageService::Self()) {
+    CacheStorageService::Self()->OnMemoryConsumptionChange(this, aCurrentSize);
+  }
+}
+
+CacheStorageService::MemoryPool::MemoryPool(EType aType) : mType(aType) {}
+
+CacheStorageService::MemoryPool::~MemoryPool() {
+  if (mMemorySize != 0) {
+    NS_ERROR(
+        "Network cache reported memory consumption is not at 0, probably "
+        "leaking?");
+  }
+}
+
+uint32_t CacheStorageService::MemoryPool::Limit() const {
+  uint32_t limit = 0;
+
+  switch (mType) {
+    case DISK:
+      limit = CacheObserver::MetadataMemoryLimit();
+      break;
+    case MEMORY:
+      limit = CacheObserver::MemoryCacheCapacity();
+      break;
+    default:
+      MOZ_CRASH("Bad pool type");
+  }
+
+  static const uint32_t kMaxLimit = 0x3FFFFF;
+  if (limit > kMaxLimit) {
+    LOG(("  a memory limit (%u) is unexpectedly high, clipping to %u", limit,
+         kMaxLimit));
+    limit = kMaxLimit;
+  }
+
+  return limit << 10;
+}
+
+NS_IMPL_ISUPPORTS(CacheStorageService, nsICacheStorageService,
+                  nsIMemoryReporter, nsITimerCallback, nsICacheTesting,
+                  nsINamed)
+
+CacheStorageService* CacheStorageService::sSelf = nullptr;
+
+CacheStorageService::CacheStorageService() {
+  CacheFileIOManager::Init();
+
+  MOZ_ASSERT(XRE_IsParentProcess());
+  MOZ_ASSERT(!sSelf);
+
+  sSelf = this;
+  sGlobalEntryTables = new GlobalEntryTables();
+
+  RegisterStrongMemoryReporter(this);
+}
+
+CacheStorageService::~CacheStorageService() {
+  LOG(("CacheStorageService::~CacheStorageService"));
+  sSelf = nullptr;
+}
+
+void CacheStorageService::Shutdown() {
+  mozilla::MutexAutoLock lock(mLock);
+
+  if (mShutdown) return;
+
+  LOG(("CacheStorageService::Shutdown - start"));
+
+  mShutdown = true;
+
+  nsCOMPtr<nsIRunnable> event =
+      NewRunnableMethod("net::CacheStorageService::ShutdownBackground", this,
+                        &CacheStorageService::ShutdownBackground);
+  Dispatch(event);
+
+#ifdef NS_FREE_PERMANENT_DATA
+  sGlobalEntryTables->Clear();
+  delete sGlobalEntryTables;
+#endif
+  sGlobalEntryTables = nullptr;
+
+  LOG(("CacheStorageService::Shutdown - done"));
+}
+
+void CacheStorageService::ShutdownBackground() {
+  LOG(("CacheStorageService::ShutdownBackground - start"));
+
+  MOZ_ASSERT(IsOnManagementThread());
+
+  {
+    mozilla::MutexAutoLock lock(mLock);
+
+    // Cancel purge timer to avoid leaking.
+    if (mPurgeTimer) {
+      LOG(("  freeing the timer"));
+      mPurgeTimer->Cancel();
+    }
+  }
+
+#ifdef NS_FREE_PERMANENT_DATA
+  Pool(false).mFrecencyArray.Clear();
+  Pool(false).mExpirationArray.Clear();
+  Pool(true).mFrecencyArray.Clear();
+  Pool(true).mExpirationArray.Clear();
+#endif
+
+  LOG(("CacheStorageService::ShutdownBackground - done"));
+}
+
+// Internal management methods
+
+namespace {
+
+// WalkCacheRunnable
+// Base class for particular storage entries visiting
+class WalkCacheRunnable : public Runnable,
+                          public CacheStorageService::EntryInfoCallback {
+ protected:
+  WalkCacheRunnable(nsICacheStorageVisitor* aVisitor, bool aVisitEntries)
+      : Runnable("net::WalkCacheRunnable"),
+        mService(CacheStorageService::Self()),
+        mCallback(aVisitor) {
+    MOZ_ASSERT(NS_IsMainThread());
+    StoreNotifyStorage(true);
+    StoreVisitEntries(aVisitEntries);
+  }
+
+  virtual ~WalkCacheRunnable() {
+    if (mCallback) {
+      ProxyReleaseMainThread("WalkCacheRunnable::mCallback", mCallback);
+    }
+  }
+
+  RefPtr<CacheStorageService> mService;
+  nsCOMPtr<nsICacheStorageVisitor> mCallback;
+
+  uint64_t mSize{0};
+
+  // clang-format off
+  MOZ_ATOMIC_BITFIELDS(mAtomicBitfields, 8, (
+    (bool, NotifyStorage, 1),
+    (bool, VisitEntries, 1)
+  ))
+  // clang-format on
+
+  Atomic<bool> mCancel{false};
+};
+
+// WalkMemoryCacheRunnable
+// Responsible to visit memory storage and walk
+// all entries on it asynchronously.
+class WalkMemoryCacheRunnable : public WalkCacheRunnable {
+ public:
+  WalkMemoryCacheRunnable(nsILoadContextInfo* aLoadInfo, bool aVisitEntries,
+                          nsICacheStorageVisitor* aVisitor)
+      : WalkCacheRunnable(aVisitor, aVisitEntries) {
+    CacheFileUtils::AppendKeyPrefix(aLoadInfo, mContextKey);
+    MOZ_ASSERT(NS_IsMainThread());
+  }
+
+  nsresult Walk() { return mService->Dispatch(this); }
+
+ private:
+  NS_IMETHOD Run() override {
+    if (CacheStorageService::IsOnManagementThread()) {
+      LOG(("WalkMemoryCacheRunnable::Run - collecting [this=%p]", this));
+      // First, walk, count and grab all entries from the storage
+
+      mozilla::MutexAutoLock lock(CacheStorageService::Self()->Lock());
+
+      if (!CacheStorageService::IsRunning()) return NS_ERROR_NOT_INITIALIZED;
+
+      for (const auto& entries : sGlobalEntryTables->Values()) {
+        if (entries->Type() != CacheEntryTable::MEMORY_ONLY) {
+          continue;
+        }
+
+        for (CacheEntry* entry : entries->Values()) {
+          MOZ_ASSERT(!entry->IsUsingDisk());
+
+          mSize += entry->GetMetadataMemoryConsumption();
+
+          int64_t size;
+          if (NS_SUCCEEDED(entry->GetDataSize(&size))) {
+            mSize += size;
+          }
+          mEntryArray.AppendElement(entry);
+        }
+      }
+
+      // Next, we dispatch to the main thread
+    } else if (NS_IsMainThread()) {
+      LOG(("WalkMemoryCacheRunnable::Run - notifying [this=%p]", this));
+
+      if (LoadNotifyStorage()) {
+        LOG(("  storage"));
+
+        uint64_t capacity = CacheObserver::MemoryCacheCapacity();
+        capacity <<= 10;  // kilobytes to bytes
+
+        // Second, notify overall storage info
+        mCallback->OnCacheStorageInfo(mEntryArray.Length(), mSize, capacity,
+                                      nullptr);
+        if (!LoadVisitEntries()) return NS_OK;  // done
+
+        StoreNotifyStorage(false);
+
+      } else {
+        LOG(("  entry [left=%zu, canceled=%d]", mEntryArray.Length(),
+             (bool)mCancel));
+
+        // Third, notify each entry until depleted or canceled
+        if (!mEntryArray.Length() || mCancel) {
+          mCallback->OnCacheEntryVisitCompleted();
+          return NS_OK;  // done
+        }
+
+        // Grab the next entry
+        RefPtr<CacheEntry> entry = mEntryArray[0];
+        mEntryArray.RemoveElementAt(0);
+
+        // Invokes this->OnEntryInfo, that calls the callback with all
+        // information of the entry.
+        CacheStorageService::GetCacheEntryInfo(entry, this);
+      }
+    } else {
+      MOZ_CRASH("Bad thread");
+      return NS_ERROR_FAILURE;
+    }
+
+    NS_DispatchToMainThread(this);
+    return NS_OK;
+  }
+
+  virtual ~WalkMemoryCacheRunnable() {
+    if (mCallback) {
+      ProxyReleaseMainThread("WalkMemoryCacheRunnable::mCallback", mCallback);
+    }
+  }
+
+  virtual void OnEntryInfo(const nsACString& aURISpec,
+                           const nsACString& aIdEnhance, int64_t aDataSize,
+                           int64_t aAltDataSize, uint32_t aFetchCount,
+                           uint32_t aLastModifiedTime, uint32_t aExpirationTime,
+                           bool aPinned, nsILoadContextInfo* aInfo) override {
+    nsresult rv;
+
+    nsCOMPtr<nsIURI> uri;
+    rv = NS_NewURI(getter_AddRefs(uri), aURISpec);
+    if (NS_FAILED(rv)) {
+      return;
+    }
+
+    rv = mCallback->OnCacheEntryInfo(uri, aIdEnhance, aDataSize, aAltDataSize,
+                                     aFetchCount, aLastModifiedTime,
+                                     aExpirationTime, aPinned, aInfo);
+    if (NS_FAILED(rv)) {
+      LOG(("  callback failed, canceling the walk"));
+      mCancel = true;
+    }
+  }
+
+ private:
+  nsCString mContextKey;
+  nsTArray<RefPtr<CacheEntry>> mEntryArray;
+};
+
+// WalkDiskCacheRunnable
+// Using the cache index information to get the list of files per context.
+class WalkDiskCacheRunnable : public WalkCacheRunnable {
+ public:
+  WalkDiskCacheRunnable(nsILoadContextInfo* aLoadInfo, bool aVisitEntries,
+                        nsICacheStorageVisitor* aVisitor)
+      : WalkCacheRunnable(aVisitor, aVisitEntries),
+        mLoadInfo(aLoadInfo),
+        mPass(COLLECT_STATS),
+        mCount(0) {}
+
+  nsresult Walk() {
+    // TODO, bug 998693
+    // Initial index build should be forced here so that about:cache soon
+    // after startup gives some meaningfull results.
+
+    // Dispatch to the INDEX level in hope that very recent cache entries
+    // information gets to the index list before we grab the index iterator
+    // for the first time.  This tries to avoid miss of entries that has
+    // been created right before the visit is required.
+    RefPtr<CacheIOThread> thread = CacheFileIOManager::IOThread();
+    NS_ENSURE_TRUE(thread, NS_ERROR_NOT_INITIALIZED);
+
+    return thread->Dispatch(this, CacheIOThread::INDEX);
+  }
+
+ private:
+  // Invokes OnCacheEntryInfo callback for each single found entry.
+  // There is one instance of this class per one entry.
+  class OnCacheEntryInfoRunnable : public Runnable {
+   public:
+    explicit OnCacheEntryInfoRunnable(WalkDiskCacheRunnable* aWalker)
+        : Runnable("net::WalkDiskCacheRunnable::OnCacheEntryInfoRunnable"),
+          mWalker(aWalker) {}
+
+    NS_IMETHOD Run() override {
+      MOZ_ASSERT(NS_IsMainThread());
+
+      nsresult rv;
+
+      nsCOMPtr<nsIURI> uri;
+      rv = NS_NewURI(getter_AddRefs(uri), mURISpec);
+      if (NS_FAILED(rv)) {
+        return NS_OK;
+      }
+
+      rv = mWalker->mCallback->OnCacheEntryInfo(
+          uri, mIdEnhance, mDataSize, mAltDataSize, mFetchCount,
+          mLastModifiedTime, mExpirationTime, mPinned, mInfo);
+      if (NS_FAILED(rv)) {
+        mWalker->mCancel = true;
+      }
+
+      return NS_OK;
+    }
+
+    RefPtr<WalkDiskCacheRunnable> mWalker;
+
+    nsCString mURISpec;
+    nsCString mIdEnhance;
+    int64_t mDataSize{0};
+    int64_t mAltDataSize{0};
+    uint32_t mFetchCount{0};
+    uint32_t mLastModifiedTime{0};
+    uint32_t mExpirationTime{0};
+    bool mPinned{false};
+    nsCOMPtr<nsILoadContextInfo> mInfo;
+  };
+
+  NS_IMETHOD Run() override {
+    // The main loop
+    nsresult rv;
+
+    if (CacheStorageService::IsOnManagementThread()) {
+      switch (mPass) {
+        case COLLECT_STATS:
+          // Get quickly the cache stats.
+          uint32_t size;
+          rv = CacheIndex::GetCacheStats(mLoadInfo, &size, &mCount);
+          if (NS_FAILED(rv)) {
+            if (LoadVisitEntries()) {
+              // both onStorageInfo and onCompleted are expected
+              NS_DispatchToMainThread(this);
+            }
+            return NS_DispatchToMainThread(this);
+          }
+
+          mSize = static_cast<uint64_t>(size) << 10;
+
+          // Invoke onCacheStorageInfo with valid information.
+          NS_DispatchToMainThread(this);
+
+          if (!LoadVisitEntries()) {
+            return NS_OK;  // done
+          }
+
+          mPass = ITERATE_METADATA;
+          [[fallthrough]];
+
+        case ITERATE_METADATA:
+          // Now grab the context iterator.
+          if (!mIter) {
+            rv =
+                CacheIndex::GetIterator(mLoadInfo, true, getter_AddRefs(mIter));
+            if (NS_FAILED(rv)) {
+              // Invoke onCacheEntryVisitCompleted now
+              return NS_DispatchToMainThread(this);
+            }
+          }
+
+          while (!mCancel && !CacheObserver::ShuttingDown()) {
+            if (CacheIOThread::YieldAndRerun()) return NS_OK;
+
+            SHA1Sum::Hash hash;
+            rv = mIter->GetNextHash(&hash);
+            if (NS_FAILED(rv)) break;  // done (or error?)
+
+            // This synchronously invokes OnEntryInfo on this class where we
+            // redispatch to the main thread for the consumer callback.
+            CacheFileIOManager::GetEntryInfo(&hash, this);
+          }
+
+          // Invoke onCacheEntryVisitCompleted on the main thread
+          NS_DispatchToMainThread(this);
+      }
+    } else if (NS_IsMainThread()) {
+      if (LoadNotifyStorage()) {
+        nsCOMPtr<nsIFile> dir;
+        CacheFileIOManager::GetCacheDirectory(getter_AddRefs(dir));
+        uint64_t capacity = CacheObserver::DiskCacheCapacity();
+        capacity <<= 10;  // kilobytes to bytes
+        mCallback->OnCacheStorageInfo(mCount, mSize, capacity, dir);
+        StoreNotifyStorage(false);
+      } else {
+        mCallback->OnCacheEntryVisitCompleted();
+      }
+    } else {
+      MOZ_CRASH("Bad thread");
+      return NS_ERROR_FAILURE;
+    }
+
+    return NS_OK;
+  }
+
+  virtual void OnEntryInfo(const nsACString& aURISpec,
+                           const nsACString& aIdEnhance, int64_t aDataSize,
+                           int64_t aAltDataSize, uint32_t aFetchCount,
+                           uint32_t aLastModifiedTime, uint32_t aExpirationTime,
+                           bool aPinned, nsILoadContextInfo* aInfo) override {
+    // Called directly from CacheFileIOManager::GetEntryInfo.
+
+    // Invoke onCacheEntryInfo on the main thread for this entry.
+    RefPtr<OnCacheEntryInfoRunnable> info = new OnCacheEntryInfoRunnable(this);
+    info->mURISpec = aURISpec;
+    info->mIdEnhance = aIdEnhance;
+    info->mDataSize = aDataSize;
+    info->mAltDataSize = aAltDataSize;
+    info->mFetchCount = aFetchCount;
+    info->mLastModifiedTime = aLastModifiedTime;
+    info->mExpirationTime = aExpirationTime;
+    info->mPinned = aPinned;
+    info->mInfo = aInfo;
+
+    NS_DispatchToMainThread(info);
+  }
+
+  RefPtr<nsILoadContextInfo> mLoadInfo;
+  enum {
+    // First, we collect stats for the load context.
+    COLLECT_STATS,
+
+    // Second, if demanded, we iterate over the entries gethered
+    // from the iterator and call CacheFileIOManager::GetEntryInfo
+    // for each found entry.
+    ITERATE_METADATA,
+  } mPass;
+
+  RefPtr<CacheIndexIterator> mIter;
+  uint32_t mCount;
+};
+
+}  // namespace
+
+void CacheStorageService::DropPrivateBrowsingEntries() {
+  mozilla::MutexAutoLock lock(mLock);
+
+  if (mShutdown) return;
+
+  nsTArray<nsCString> keys;
+  for (const nsACString& key : sGlobalEntryTables->Keys()) {
+    nsCOMPtr<nsILoadContextInfo> info = CacheFileUtils::ParseKey(key);
+    if (info && info->IsPrivate()) {
+      keys.AppendElement(key);
+    }
+  }
+
+  for (uint32_t i = 0; i < keys.Length(); ++i) {
+    DoomStorageEntries(keys[i], nullptr, true, false, nullptr);
+  }
+}
+
+// Helper methods
+
+// static
+bool CacheStorageService::IsOnManagementThread() {
+  RefPtr<CacheStorageService> service = Self();
+  if (!service) return false;
+
+  nsCOMPtr<nsIEventTarget> target = service->Thread();
+  if (!target) return false;
+
+  bool currentThread;
+  nsresult rv = target->IsOnCurrentThread(&currentThread);
+  return NS_SUCCEEDED(rv) && currentThread;
+}
+
+already_AddRefed<nsIEventTarget> CacheStorageService::Thread() const {
+  return CacheFileIOManager::IOTarget();
+}
+
+nsresult CacheStorageService::Dispatch(nsIRunnable* aEvent) {
+  RefPtr<CacheIOThread> cacheIOThread = CacheFileIOManager::IOThread();
+  if (!cacheIOThread) return NS_ERROR_NOT_AVAILABLE;
+
+  return cacheIOThread->Dispatch(aEvent, CacheIOThread::MANAGEMENT);
+}
+
+namespace CacheStorageEvictHelper {
+
+nsresult ClearStorage(bool const aPrivate, bool const aAnonymous,
+                      OriginAttributes& aOa) {
+  nsresult rv;
+
+  aOa.SyncAttributesWithPrivateBrowsing(aPrivate);
+  RefPtr<LoadContextInfo> info = GetLoadContextInfo(aAnonymous, aOa);
+
+  nsCOMPtr<nsICacheStorage> storage;
+  RefPtr<CacheStorageService> service = CacheStorageService::Self();
+  NS_ENSURE_TRUE(service, NS_ERROR_FAILURE);
+
+  // Clear disk storage
+  rv = service->DiskCacheStorage(info, getter_AddRefs(storage));
+  NS_ENSURE_SUCCESS(rv, rv);
+  rv = storage->AsyncEvictStorage(nullptr);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Clear memory storage
+  rv = service->MemoryCacheStorage(info, getter_AddRefs(storage));
+  NS_ENSURE_SUCCESS(rv, rv);
+  rv = storage->AsyncEvictStorage(nullptr);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return NS_OK;
+}
+
+nsresult Run(OriginAttributes& aOa) {
+  nsresult rv;
+
+  // Clear all [private X anonymous] combinations
+  rv = ClearStorage(false, false, aOa);
+  NS_ENSURE_SUCCESS(rv, rv);
+  rv = ClearStorage(false, true, aOa);
+  NS_ENSURE_SUCCESS(rv, rv);
+  rv = ClearStorage(true, false, aOa);
+  NS_ENSURE_SUCCESS(rv, rv);
+  rv = ClearStorage(true, true, aOa);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return NS_OK;
+}
+
+}  // namespace CacheStorageEvictHelper
+
+// nsICacheStorageService
+
+NS_IMETHODIMP CacheStorageService::MemoryCacheStorage(
+    nsILoadContextInfo* aLoadContextInfo, nsICacheStorage** _retval) {
+  NS_ENSURE_ARG(_retval);
+
+  nsCOMPtr<nsICacheStorage> storage =
+      new CacheStorage(aLoadContextInfo, false, false, false);
+  storage.forget(_retval);
+  return NS_OK;
+}
+
+NS_IMETHODIMP CacheStorageService::DiskCacheStorage(
+    nsILoadContextInfo* aLoadContextInfo, nsICacheStorage** _retval) {
+  NS_ENSURE_ARG(_retval);
+
+  // TODO save some heap granularity - cache commonly used storages.
+
+  // When disk cache is disabled, still provide a storage, but just keep stuff
+  // in memory.
+  bool useDisk = CacheObserver::UseDiskCache();
+
+  nsCOMPtr<nsICacheStorage> storage = new CacheStorage(
+      aLoadContextInfo, useDisk, false /* size limit */, false /* don't pin */);
+  storage.forget(_retval);
+  return NS_OK;
+}
+
+NS_IMETHODIMP CacheStorageService::PinningCacheStorage(
+    nsILoadContextInfo* aLoadContextInfo, nsICacheStorage** _retval) {
+  NS_ENSURE_ARG(aLoadContextInfo);
+  NS_ENSURE_ARG(_retval);
+
+  // When disk cache is disabled don't pretend we cache.
+  if (!CacheObserver::UseDiskCache()) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  nsCOMPtr<nsICacheStorage> storage =
+      new CacheStorage(aLoadContextInfo, true /* use disk */,
+                       true /* ignore size checks */, true /* pin */);
+  storage.forget(_retval);
+  return NS_OK;
+}
+
+NS_IMETHODIMP CacheStorageService::Clear() {
+  nsresult rv;
+
+  // Tell the index to block notification to AsyncGetDiskConsumption.
+  // Will be allowed again from CacheFileContextEvictor::EvictEntries()
+  // when all the context have been removed from disk.
+  CacheIndex::OnAsyncEviction(true);
+
+  mozilla::MutexAutoLock lock(mLock);
+
+  {
+    mozilla::MutexAutoLock forcedValidEntriesLock(mForcedValidEntriesLock);
+    mForcedValidEntries.Clear();
+  }
+
+  NS_ENSURE_TRUE(!mShutdown, NS_ERROR_NOT_INITIALIZED);
+
+  const auto keys = ToTArray<nsTArray<nsCString>>(sGlobalEntryTables->Keys());
+  for (const auto& key : keys) {
+    DoomStorageEntries(key, nullptr, true, false, nullptr);
+  }
+
+  // Passing null as a load info means to evict all contexts.
+  // EvictByContext() respects the entry pinning.  EvictAll() does not.
+  rv = CacheFileIOManager::EvictByContext(nullptr, false, u""_ns);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP CacheStorageService::ClearOrigin(nsIPrincipal* aPrincipal) {
+  nsresult rv;
+
+  if (NS_WARN_IF(!aPrincipal)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  nsAutoString origin;
+  rv = nsContentUtils::GetUTFOrigin(aPrincipal, origin);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = ClearOriginInternal(origin, aPrincipal->OriginAttributesRef(), true);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = ClearOriginInternal(origin, aPrincipal->OriginAttributesRef(), false);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP CacheStorageService::ClearOriginAttributes(
+    const nsAString& aOriginAttributes) {
+  nsresult rv;
+
+  if (NS_WARN_IF(aOriginAttributes.IsEmpty())) {
+    return NS_ERROR_FAILURE;
+  }
+
+  OriginAttributes oa;
+  if (!oa.Init(aOriginAttributes)) {
+    NS_ERROR("Could not parse the argument for OriginAttributes");
+    return NS_ERROR_FAILURE;
+  }
+
+  rv = CacheStorageEvictHelper::Run(oa);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return NS_OK;
+}
+
+static bool RemoveExactEntry(CacheEntryTable* aEntries, nsACString const& aKey,
+                             CacheEntry* aEntry, bool aOverwrite) {
+  RefPtr<CacheEntry> existingEntry;
+  if (!aEntries->Get(aKey, getter_AddRefs(existingEntry))) {
+    LOG(("RemoveExactEntry [entry=%p already gone]", aEntry));
+    return false;  // Already removed...
+  }
+
+  if (!aOverwrite && existingEntry != aEntry) {
+    LOG(("RemoveExactEntry [entry=%p already replaced]", aEntry));
+    return false;  // Already replaced...
+  }
+
+  LOG(("RemoveExactEntry [entry=%p removed]", aEntry));
+  aEntries->Remove(aKey);
+  return true;
+}
+
+NS_IMETHODIMP CacheStorageService::ClearBaseDomain(
+    const nsAString& aBaseDomain) {
+  if (sGlobalEntryTables) {
+    mozilla::MutexAutoLock lock(mLock);
+
+    if (mShutdown) return NS_ERROR_NOT_AVAILABLE;
+
+    nsCString cBaseDomain = NS_ConvertUTF16toUTF8(aBaseDomain);
+
+    nsTArray<nsCString> keys;
+    for (const auto& globalEntry : *sGlobalEntryTables) {
+      // Match by partitionKey base domain. This should cover most cache entries
+      // because we statically partition the cache. Most first party cache
+      // entries will also have a partitionKey set where the partitionKey base
+      // domain will match the entry URI base domain.
+      const nsACString& key = globalEntry.GetKey();
+      nsCOMPtr<nsILoadContextInfo> info =
+          CacheFileUtils::ParseKey(globalEntry.GetKey());
+
+      if (info &&
+          StoragePrincipalHelper::PartitionKeyHasBaseDomain(
+              info->OriginAttributesPtr()->mPartitionKey, aBaseDomain)) {
+        keys.AppendElement(key);
+        continue;
+      }
+
+      // If we didn't get a partitionKey match, try to match by entry URI. This
+      // requires us to iterate over all entries.
+      CacheEntryTable* table = globalEntry.GetWeak();
+      MOZ_ASSERT(table);
+
+      nsTArray<RefPtr<CacheEntry>> entriesToDelete;
+
+      for (CacheEntry* entry : table->Values()) {
+        nsCOMPtr<nsIURI> uri;
+        nsresult rv = NS_NewURI(getter_AddRefs(uri), entry->GetURI());
+        if (NS_WARN_IF(NS_FAILED(rv))) {
+          continue;
+        }
+
+        nsAutoCString host;
+        rv = uri->GetHost(host);
+        // Some entries may not have valid hosts. We can skip them.
+        if (NS_FAILED(rv) || host.IsEmpty()) {
+          continue;
+        }
+
+        bool hasRootDomain = false;
+        rv = HasRootDomain(host, cBaseDomain, &hasRootDomain);
+        if (NS_WARN_IF(NS_FAILED(rv))) {
+          continue;
+        }
+        if (hasRootDomain) {
+          entriesToDelete.AppendElement(entry);
+        }
+      }
+
+      // Clear individual matched entries.
+      for (RefPtr<CacheEntry>& entry : entriesToDelete) {
+        nsAutoCString entryKey;
+        nsresult rv = entry->HashingKey(entryKey);
+        if (NS_FAILED(rv)) {
+          NS_ERROR("aEntry->HashingKey() failed?");
+          return rv;
+        }
+
+        RemoveExactEntry(table, entryKey, entry, false /* don't overwrite */);
+      }
+    }
+
+    // Clear matched keys.
+    for (uint32_t i = 0; i < keys.Length(); ++i) {
+      DoomStorageEntries(keys[i], nullptr, true, false, nullptr);
+    }
+  }
+
+  return CacheFileIOManager::EvictByContext(nullptr, false /* pinned */, u""_ns,
+                                            aBaseDomain);
+}
+
+nsresult CacheStorageService::ClearOriginInternal(
+    const nsAString& aOrigin, const OriginAttributes& aOriginAttributes,
+    bool aAnonymous) {
+  nsresult rv;
+
+  RefPtr<LoadContextInfo> info =
+      GetLoadContextInfo(aAnonymous, aOriginAttributes);
+  if (NS_WARN_IF(!info)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  mozilla::MutexAutoLock lock(mLock);
+
+  if (sGlobalEntryTables) {
+    for (const auto& globalEntry : *sGlobalEntryTables) {
+      bool matches = false;
+      rv = CacheFileUtils::KeyMatchesLoadContextInfo(globalEntry.GetKey(), info,
+                                                     &matches);
+      NS_ENSURE_SUCCESS(rv, rv);
+      if (!matches) {
+        continue;
+      }
+
+      CacheEntryTable* table = globalEntry.GetWeak();
+      MOZ_ASSERT(table);
+
+      nsTArray<RefPtr<CacheEntry>> entriesToDelete;
+
+      for (CacheEntry* entry : table->Values()) {
+        nsCOMPtr<nsIURI> uri;
+        rv = NS_NewURI(getter_AddRefs(uri), entry->GetURI());
+        NS_ENSURE_SUCCESS(rv, rv);
+
+        nsAutoString origin;
+        rv = nsContentUtils::GetUTFOrigin(uri, origin);
+        NS_ENSURE_SUCCESS(rv, rv);
+
+        if (origin != aOrigin) {
+          continue;
+        }
+
+        entriesToDelete.AppendElement(entry);
+      }
+
+      for (RefPtr<CacheEntry>& entry : entriesToDelete) {
+        nsAutoCString entryKey;
+        rv = entry->HashingKey(entryKey);
+        if (NS_FAILED(rv)) {
+          NS_ERROR("aEntry->HashingKey() failed?");
+          return rv;
+        }
+
+        RemoveExactEntry(table, entryKey, entry, false /* don't overwrite */);
+      }
+    }
+  }
+
+  rv = CacheFileIOManager::EvictByContext(info, false /* pinned */, aOrigin);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP CacheStorageService::PurgeFromMemory(uint32_t aWhat) {
+  uint32_t what;
+
+  switch (aWhat) {
+    case PURGE_DISK_DATA_ONLY:
+      what = CacheEntry::PURGE_DATA_ONLY_DISK_BACKED;
+      break;
+
+    case PURGE_DISK_ALL:
+      what = CacheEntry::PURGE_WHOLE_ONLY_DISK_BACKED;
+      break;
+
+    case PURGE_EVERYTHING:
+      what = CacheEntry::PURGE_WHOLE;
+      break;
+
+    default:
+      return NS_ERROR_INVALID_ARG;
+  }
+
+  nsCOMPtr<nsIRunnable> event = new PurgeFromMemoryRunnable(this, what);
+
+  return Dispatch(event);
+}
+
+NS_IMETHODIMP CacheStorageService::PurgeFromMemoryRunnable::Run() {
+  if (NS_IsMainThread()) {
+    nsCOMPtr<nsIObserverService> observerService =
+        mozilla::services::GetObserverService();
+    if (observerService) {
+      observerService->NotifyObservers(
+          nullptr, "cacheservice:purge-memory-pools", nullptr);
+    }
+
+    return NS_OK;
+  }
+
+  if (mService) {
+    // TODO not all flags apply to both pools
+    mService->Pool(true).PurgeAll(mWhat);
+    mService->Pool(false).PurgeAll(mWhat);
+    mService = nullptr;
+  }
+
+  NS_DispatchToMainThread(this);
+  return NS_OK;
+}
+
+NS_IMETHODIMP CacheStorageService::AsyncGetDiskConsumption(
+    nsICacheStorageConsumptionObserver* aObserver) {
+  NS_ENSURE_ARG(aObserver);
+
+  nsresult rv;
+
+  rv = CacheIndex::AsyncGetDiskConsumption(aObserver);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP CacheStorageService::GetIoTarget(nsIEventTarget** aEventTarget) {
+  NS_ENSURE_ARG(aEventTarget);
+
+  nsCOMPtr<nsIEventTarget> ioTarget = CacheFileIOManager::IOTarget();
+  ioTarget.forget(aEventTarget);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP CacheStorageService::AsyncVisitAllStorages(
+    nsICacheStorageVisitor* aVisitor, bool aVisitEntries) {
+  LOG(("CacheStorageService::AsyncVisitAllStorages [cb=%p]", aVisitor));
+  NS_ENSURE_FALSE(mShutdown, NS_ERROR_NOT_INITIALIZED);
+
+  // Walking the disk cache also walks the memory cache.
+  RefPtr<WalkDiskCacheRunnable> event =
+      new WalkDiskCacheRunnable(nullptr, aVisitEntries, aVisitor);
+  return event->Walk();
+}
+
+// Methods used by CacheEntry for management of in-memory structures.
+
+namespace {
+
+class FrecencyComparator {
+ public:
+  bool Equals(CacheEntry* a, CacheEntry* b) const {
+    return a->GetFrecency() == b->GetFrecency();
+  }
+  bool LessThan(CacheEntry* a, CacheEntry* b) const {
+    // We deliberately want to keep the '0' frecency entries at the tail of the
+    // aray, because these are new entries and would just slow down purging of
+    // the pools based on frecency.
+    if (a->GetFrecency() == 0.0 && b->GetFrecency() > 0.0) {
+      return false;
+    }
+    if (a->GetFrecency() > 0.0 && b->GetFrecency() == 0.0) {
+      return true;
+    }
+
+    return a->GetFrecency() < b->GetFrecency();
+  }
+};
+
+class ExpirationComparator {
+ public:
+  bool Equals(CacheEntry* a, CacheEntry* b) const {
+    return a->GetExpirationTime() == b->GetExpirationTime();
+  }
+  bool LessThan(CacheEntry* a, CacheEntry* b) const {
+    return a->GetExpirationTime() < b->GetExpirationTime();
+  }
+};
+
+}  // namespace
+
+void CacheStorageService::RegisterEntry(CacheEntry* aEntry) {
+  MOZ_ASSERT(IsOnManagementThread());
+
+  if (mShutdown || !aEntry->CanRegister()) return;
+
+  TelemetryRecordEntryCreation(aEntry);
+
+  LOG(("CacheStorageService::RegisterEntry [entry=%p]", aEntry));
+
+  MemoryPool& pool = Pool(aEntry->IsUsingDisk());
+  pool.mFrecencyArray.AppendElement(aEntry);
+  pool.mExpirationArray.AppendElement(aEntry);
+
+  aEntry->SetRegistered(true);
+}
+
+void CacheStorageService::UnregisterEntry(CacheEntry* aEntry) {
+  MOZ_ASSERT(IsOnManagementThread());
+
+  if (!aEntry->IsRegistered()) return;
+
+  TelemetryRecordEntryRemoval(aEntry);
+
+  LOG(("CacheStorageService::UnregisterEntry [entry=%p]", aEntry));
+
+  MemoryPool& pool = Pool(aEntry->IsUsingDisk());
+  mozilla::DebugOnly<bool> removedFrecency =
+      pool.mFrecencyArray.RemoveElement(aEntry);
+  mozilla::DebugOnly<bool> removedExpiration =
+      pool.mExpirationArray.RemoveElement(aEntry);
+
+  MOZ_ASSERT(mShutdown || (removedFrecency && removedExpiration));
+
+  // Note: aEntry->CanRegister() since now returns false
+  aEntry->SetRegistered(false);
+}
+
+static bool AddExactEntry(CacheEntryTable* aEntries, nsACString const& aKey,
+                          CacheEntry* aEntry, bool aOverwrite) {
+  RefPtr<CacheEntry> existingEntry;
+  if (!aOverwrite && aEntries->Get(aKey, getter_AddRefs(existingEntry))) {
+    bool equals = existingEntry == aEntry;
+    LOG(("AddExactEntry [entry=%p equals=%d]", aEntry, equals));
+    return equals;  // Already there...
+  }
+
+  LOG(("AddExactEntry [entry=%p put]", aEntry));
+  aEntries->InsertOrUpdate(aKey, RefPtr{aEntry});
+  return true;
+}
+
+bool CacheStorageService::RemoveEntry(CacheEntry* aEntry,
+                                      bool aOnlyUnreferenced) {
+  LOG(("CacheStorageService::RemoveEntry [entry=%p]", aEntry));
+
+  nsAutoCString entryKey;
+  nsresult rv = aEntry->HashingKey(entryKey);
+  if (NS_FAILED(rv)) {
+    NS_ERROR("aEntry->HashingKey() failed?");
+    return false;
+  }
+
+  mozilla::MutexAutoLock lock(mLock);
+
+  if (mShutdown) {
+    LOG(("  after shutdown"));
+    return false;
+  }
+
+  if (aOnlyUnreferenced) {
+    if (aEntry->IsReferenced()) {
+      LOG(("  still referenced, not removing"));
+      return false;
+    }
+
+    if (!aEntry->IsUsingDisk() &&
+        IsForcedValidEntry(aEntry->GetStorageID(), entryKey)) {
+      LOG(("  forced valid, not removing"));
+      return false;
+    }
+  }
+
+  CacheEntryTable* entries;
+  if (sGlobalEntryTables->Get(aEntry->GetStorageID(), &entries)) {
+    RemoveExactEntry(entries, entryKey, aEntry, false /* don't overwrite */);
+  }
+
+  nsAutoCString memoryStorageID(aEntry->GetStorageID());
+  AppendMemoryStorageTag(memoryStorageID);
+
+  if (sGlobalEntryTables->Get(memoryStorageID, &entries)) {
+    RemoveExactEntry(entries, entryKey, aEntry, false /* don't overwrite */);
+  }
+
+  return true;
+}
+
+void CacheStorageService::RecordMemoryOnlyEntry(CacheEntry* aEntry,
+                                                bool aOnlyInMemory,
+                                                bool aOverwrite) {
+  LOG(
+      ("CacheStorageService::RecordMemoryOnlyEntry [entry=%p, memory=%d, "
+       "overwrite=%d]",
+       aEntry, aOnlyInMemory, aOverwrite));
+  // This method is responsible to put this entry to a special record hashtable
+  // that contains only entries that are stored in memory.
+  // Keep in mind that every entry, regardless of whether is in-memory-only or
+  // not is always recorded in the storage master hash table, the one identified
+  // by CacheEntry.StorageID().
+
+  mLock.AssertCurrentThreadOwns();
+
+  if (mShutdown) {
+    LOG(("  after shutdown"));
+    return;
+  }
+
+  nsresult rv;
+
+  nsAutoCString entryKey;
+  rv = aEntry->HashingKey(entryKey);
+  if (NS_FAILED(rv)) {
+    NS_ERROR("aEntry->HashingKey() failed?");
+    return;
+  }
+
+  CacheEntryTable* entries = nullptr;
+  nsAutoCString memoryStorageID(aEntry->GetStorageID());
+  AppendMemoryStorageTag(memoryStorageID);
+
+  if (!sGlobalEntryTables->Get(memoryStorageID, &entries)) {
+    if (!aOnlyInMemory) {
+      LOG(("  not recorded as memory only"));
+      return;
+    }
+
+    entries = sGlobalEntryTables
+                  ->InsertOrUpdate(
+                      memoryStorageID,
+                      MakeUnique<CacheEntryTable>(CacheEntryTable::MEMORY_ONLY))
+                  .get();
+    LOG(("  new memory-only storage table for %s", memoryStorageID.get()));
+  }
+
+  if (aOnlyInMemory) {
+    AddExactEntry(entries, entryKey, aEntry, aOverwrite);
+  } else {
+    RemoveExactEntry(entries, entryKey, aEntry, aOverwrite);
+  }
+}
+
+// Checks if a cache entry is forced valid (will be loaded directly from cache
+// without further validation) - see nsICacheEntry.idl for further details
+bool CacheStorageService::IsForcedValidEntry(nsACString const& aContextKey,
+                                             nsACString const& aEntryKey) {
+  return IsForcedValidEntry(aContextKey + aEntryKey);
+}
+
+bool CacheStorageService::IsForcedValidEntry(
+    nsACString const& aContextEntryKey) {
+  mozilla::MutexAutoLock lock(mForcedValidEntriesLock);
+
+  ForcedValidData data;
+
+  if (!mForcedValidEntries.Get(aContextEntryKey, &data)) {
+    return false;
+  }
+
+  if (data.validUntil.IsNull()) {
+    MOZ_ASSERT_UNREACHABLE("the timeStamp should never be null");
+    return false;
+  }
+
+  // Entry timeout not reached yet
+  if (TimeStamp::NowLoRes() <= data.validUntil) {
+    return true;
+  }
+
+  // Entry timeout has been reached
+  mForcedValidEntries.Remove(aContextEntryKey);
+
+  if (!data.viewed) {
+    Telemetry::AccumulateCategorical(
+        Telemetry::LABELS_PREDICTOR_PREFETCH_USE_STATUS::WaitedTooLong);
+  }
+  return false;
+}
+
+void CacheStorageService::MarkForcedValidEntryUse(nsACString const& aContextKey,
+                                                  nsACString const& aEntryKey) {
+  mozilla::MutexAutoLock lock(mForcedValidEntriesLock);
+
+  ForcedValidData data;
+
+  if (!mForcedValidEntries.Get(aContextKey + aEntryKey, &data)) {
+    return;
+  }
+
+  data.viewed = true;
+  mForcedValidEntries.InsertOrUpdate(aContextKey + aEntryKey, data);
+}
+
+// Allows a cache entry to be loaded directly from cache without further
+// validation - see nsICacheEntry.idl for further details
+void CacheStorageService::ForceEntryValidFor(nsACString const& aContextKey,
+                                             nsACString const& aEntryKey,
+                                             uint32_t aSecondsToTheFuture) {
+  mozilla::MutexAutoLock lock(mForcedValidEntriesLock);
+
+  TimeStamp now = TimeStamp::NowLoRes();
+  ForcedValidEntriesPrune(now);
+
+  ForcedValidData data;
+  data.validUntil = now + TimeDuration::FromSeconds(aSecondsToTheFuture);
+  data.viewed = false;
+
+  mForcedValidEntries.InsertOrUpdate(aContextKey + aEntryKey, data);
+}
+
+void CacheStorageService::RemoveEntryForceValid(nsACString const& aContextKey,
+                                                nsACString const& aEntryKey) {
+  mozilla::MutexAutoLock lock(mForcedValidEntriesLock);
+
+  LOG(("CacheStorageService::RemoveEntryForceValid context='%s' entryKey=%s",
+       aContextKey.BeginReading(), aEntryKey.BeginReading()));
+  ForcedValidData data;
+  bool ok = mForcedValidEntries.Get(aContextKey + aEntryKey, &data);
+  if (ok && !data.viewed) {
+    Telemetry::AccumulateCategorical(
+        Telemetry::LABELS_PREDICTOR_PREFETCH_USE_STATUS::WaitedTooLong);
+  }
+  mForcedValidEntries.Remove(aContextKey + aEntryKey);
+}
+
+// Cleans out the old entries in mForcedValidEntries
+void CacheStorageService::ForcedValidEntriesPrune(TimeStamp& now) {
+  static TimeDuration const oneMinute = TimeDuration::FromSeconds(60);
+  static TimeStamp dontPruneUntil = now + oneMinute;
+  if (now < dontPruneUntil) return;
+
+  for (auto iter = mForcedValidEntries.Iter(); !iter.Done(); iter.Next()) {
+    if (iter.Data().validUntil < now) {
+      if (!iter.Data().viewed) {
+        Telemetry::AccumulateCategorical(
+            Telemetry::LABELS_PREDICTOR_PREFETCH_USE_STATUS::WaitedTooLong);
+      }
+      iter.Remove();
+    }
+  }
+  dontPruneUntil = now + oneMinute;
+}
+
+void CacheStorageService::OnMemoryConsumptionChange(
+    CacheMemoryConsumer* aConsumer, uint32_t aCurrentMemoryConsumption) {
+  LOG(("CacheStorageService::OnMemoryConsumptionChange [consumer=%p, size=%u]",
+       aConsumer, aCurrentMemoryConsumption));
+
+  uint32_t savedMemorySize = aConsumer->LoadReportedMemoryConsumption();
+  if (savedMemorySize == aCurrentMemoryConsumption) return;
+
+  // Exchange saved size with current one.
+  aConsumer->StoreReportedMemoryConsumption(aCurrentMemoryConsumption);
+
+  bool usingDisk = !(aConsumer->LoadFlags() & CacheMemoryConsumer::MEMORY_ONLY);
+  bool overLimit = Pool(usingDisk).OnMemoryConsumptionChange(
+      savedMemorySize, aCurrentMemoryConsumption);
+
+  if (!overLimit) return;
+
+    // It's likely the timer has already been set when we get here,
+    // check outside the lock to save resources.
+#ifdef MOZ_TSAN
+  if (mPurgeTimerActive) {
+#else
+  if (mPurgeTimer) {
+#endif
+    return;
+  }
+
+  // We don't know if this is called under the service lock or not,
+  // hence rather dispatch.
+  RefPtr<nsIEventTarget> cacheIOTarget = Thread();
+  if (!cacheIOTarget) return;
+
+  // Dispatch as a priority task, we want to set the purge timer
+  // ASAP to prevent vain redispatch of this event.
+  nsCOMPtr<nsIRunnable> event = NewRunnableMethod(
+      "net::CacheStorageService::SchedulePurgeOverMemoryLimit", this,
+      &CacheStorageService::SchedulePurgeOverMemoryLimit);
+  cacheIOTarget->Dispatch(event, nsIEventTarget::DISPATCH_NORMAL);
+}
+
+bool CacheStorageService::MemoryPool::OnMemoryConsumptionChange(
+    uint32_t aSavedMemorySize, uint32_t aCurrentMemoryConsumption) {
+  mMemorySize -= aSavedMemorySize;
+  mMemorySize += aCurrentMemoryConsumption;
+
+  LOG(("  mMemorySize=%u (+%u,-%u)", uint32_t(mMemorySize),
+       aCurrentMemoryConsumption, aSavedMemorySize));
+
+  // Bypass purging when memory has not grew up significantly
+  if (aCurrentMemoryConsumption <= aSavedMemorySize) return false;
+
+  return mMemorySize > Limit();
+}
+
+void CacheStorageService::SchedulePurgeOverMemoryLimit() {
+  LOG(("CacheStorageService::SchedulePurgeOverMemoryLimit"));
+
+  mozilla::MutexAutoLock lock(mLock);
+
+  if (mShutdown) {
+    LOG(("  past shutdown"));
+    return;
+  }
+
+  if (mPurgeTimer) {
+    LOG(("  timer already up"));
+    return;
+  }
+
+  mPurgeTimer = NS_NewTimer();
+  if (mPurgeTimer) {
+#ifdef MOZ_TSAN
+    mPurgeTimerActive = true;
+#endif
+    nsresult rv;
+    rv = mPurgeTimer->InitWithCallback(this, 1000, nsITimer::TYPE_ONE_SHOT);
+    LOG(("  timer init rv=0x%08" PRIx32, static_cast<uint32_t>(rv)));
+  }
+}
+
+NS_IMETHODIMP
+CacheStorageService::Notify(nsITimer* aTimer) {
+  LOG(("CacheStorageService::Notify"));
+
+  mozilla::MutexAutoLock lock(mLock);
+
+  if (aTimer == mPurgeTimer) {
+#ifdef MOZ_TSAN
+    mPurgeTimerActive = false;
+#endif
+    mPurgeTimer = nullptr;
+
+    nsCOMPtr<nsIRunnable> event =
+        NewRunnableMethod("net::CacheStorageService::PurgeOverMemoryLimit",
+                          this, &CacheStorageService::PurgeOverMemoryLimit);
+    Dispatch(event);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+CacheStorageService::GetName(nsACString& aName) {
+  aName.AssignLiteral("CacheStorageService");
+  return NS_OK;
+}
+
+void CacheStorageService::PurgeOverMemoryLimit() {
+  MOZ_ASSERT(IsOnManagementThread());
+
+  LOG(("CacheStorageService::PurgeOverMemoryLimit"));
+
+  static TimeDuration const kFourSeconds = TimeDuration::FromSeconds(4);
+  TimeStamp now = TimeStamp::NowLoRes();
+
+  if (!mLastPurgeTime.IsNull() && now - mLastPurgeTime < kFourSeconds) {
+    LOG(("  bypassed, too soon"));
+    return;
+  }
+
+  mLastPurgeTime = now;
+
+  Pool(true).PurgeOverMemoryLimit();
+  Pool(false).PurgeOverMemoryLimit();
+}
+
+void CacheStorageService::MemoryPool::PurgeOverMemoryLimit() {
+  TimeStamp start(TimeStamp::Now());
+
+  uint32_t const memoryLimit = Limit();
+  if (mMemorySize > memoryLimit) {
+    LOG(("  memory data consumption over the limit, abandon expired entries"));
+    PurgeExpired();
+  }
+
+  // No longer makes sense since:
+  // Memory entries are never purged partially, only as a whole when the memory
+  // cache limit is overreached.
+  // Disk entries throw the data away ASAP so that only metadata are kept.
+  // TODO when this concept of two separate pools is found working, the code
+  // should clean up.
+#if 0
+  if (mMemorySize > memoryLimit) {
+    LOG(("  memory data consumption over the limit, abandon disk backed data"));
+    PurgeByFrecency(CacheEntry::PURGE_DATA_ONLY_DISK_BACKED);
+  }
+
+  if (mMemorySize > memoryLimit) {
+    LOG(("  metadata consumtion over the limit, abandon disk backed entries"));
+    PurgeByFrecency(CacheEntry::PURGE_WHOLE_ONLY_DISK_BACKED);
+  }
+#endif
+
+  if (mMemorySize > memoryLimit) {
+    LOG(("  memory data consumption over the limit, abandon any entry"));
+    PurgeByFrecency(CacheEntry::PURGE_WHOLE);
+  }
+
+  LOG(("  purging took %1.2fms", (TimeStamp::Now() - start).ToMilliseconds()));
+}
+
+void CacheStorageService::MemoryPool::PurgeExpired() {
+  MOZ_ASSERT(IsOnManagementThread());
+
+  mExpirationArray.Sort(ExpirationComparator());
+  uint32_t now = NowInSeconds();
+
+  uint32_t const memoryLimit = Limit();
+
+  for (uint32_t i = 0;
+       mMemorySize > memoryLimit && i < mExpirationArray.Length();) {
+    if (CacheIOThread::YieldAndRerun()) return;
+
+    RefPtr<CacheEntry> entry = mExpirationArray[i];
+
+    uint32_t expirationTime = entry->GetExpirationTime();
+    if (expirationTime > 0 && expirationTime <= now &&
+        entry->Purge(CacheEntry::PURGE_WHOLE)) {
+      LOG(("  purged expired, entry=%p, exptime=%u (now=%u)", entry.get(),
+           entry->GetExpirationTime(), now));
+      continue;
+    }
+
+    // not purged, move to the next one
+    ++i;
+  }
+}
+
+void CacheStorageService::MemoryPool::PurgeByFrecency(uint32_t aWhat) {
+  MOZ_ASSERT(IsOnManagementThread());
+
+  // Pretend the limit is 10% lower so that we get rid of more entries at one
+  // shot and save the sorting below.
+  uint32_t const memoryLimit = Limit() * 0.9;
+
+  // Let's do our best and try to shorten the array to at least this size so
+  // that it doesn't overgrow.  We will ignore higher priority events and keep
+  // looping to try to purge while the array is larget than this size.
+  static size_t const kFrecencyArrayLengthLimit = 2000;
+
+  LOG(("MemoryPool::PurgeByFrecency, len=%zu", mFrecencyArray.Length()));
+
+  mFrecencyArray.Sort(FrecencyComparator());
+
+  for (uint32_t i = 0;
+       mMemorySize > memoryLimit && i < mFrecencyArray.Length();) {
+    if (mFrecencyArray.Length() <= kFrecencyArrayLengthLimit &&
+        CacheIOThread::YieldAndRerun()) {
+      LOG(("MemoryPool::PurgeByFrecency interrupted"));
+      return;
+    }
+
+    RefPtr<CacheEntry> entry = mFrecencyArray[i];
+    if (entry->Purge(aWhat)) {
+      LOG(("  abandoned (%d), entry=%p, frecency=%1.10f", aWhat, entry.get(),
+           entry->GetFrecency()));
+      continue;
+    }
+
+    // not purged, move to the next one
+    ++i;
+  }
+
+  LOG(("MemoryPool::PurgeByFrecency done"));
+}
+
+void CacheStorageService::MemoryPool::PurgeAll(uint32_t aWhat) {
+  LOG(("CacheStorageService::MemoryPool::PurgeAll aWhat=%d", aWhat));
+  MOZ_ASSERT(IsOnManagementThread());
+
+  for (uint32_t i = 0; i < mFrecencyArray.Length();) {
+    if (CacheIOThread::YieldAndRerun()) return;
+
+    RefPtr<CacheEntry> entry = mFrecencyArray[i];
+
+    if (entry->Purge(aWhat)) {
+      LOG(("  abandoned entry=%p", entry.get()));
+      continue;
+    }
+
+    // not purged, move to the next one
+    ++i;
+  }
+}
+
+// Methods exposed to and used by CacheStorage.
+
+nsresult CacheStorageService::AddStorageEntry(CacheStorage const* aStorage,
+                                              const nsACString& aURI,
+                                              const nsACString& aIdExtension,
+                                              uint32_t aFlags,
+                                              CacheEntryHandle** aResult) {
+  NS_ENSURE_FALSE(mShutdown, NS_ERROR_NOT_INITIALIZED);
+
+  NS_ENSURE_ARG(aStorage);
+
+  nsAutoCString contextKey;
+  CacheFileUtils::AppendKeyPrefix(aStorage->LoadInfo(), contextKey);
+
+  return AddStorageEntry(contextKey, aURI, aIdExtension,
+                         aStorage->WriteToDisk(), aStorage->SkipSizeCheck(),
+                         aStorage->Pinning(), aFlags, aResult);
+}
+
+nsresult CacheStorageService::AddStorageEntry(
+    const nsACString& aContextKey, const nsACString& aURI,
+    const nsACString& aIdExtension, bool aWriteToDisk, bool aSkipSizeCheck,
+    bool aPin, uint32_t aFlags, CacheEntryHandle** aResult) {
+  nsresult rv;
+
+  nsAutoCString entryKey;
+  rv = CacheEntry::HashingKey(""_ns, aIdExtension, aURI, entryKey);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  LOG(("CacheStorageService::AddStorageEntry [entryKey=%s, contextKey=%s]",
+       entryKey.get(), aContextKey.BeginReading()));
+
+  RefPtr<CacheEntry> entry;
+  RefPtr<CacheEntryHandle> handle;
+
+  {
+    mozilla::MutexAutoLock lock(mLock);
+
+    NS_ENSURE_FALSE(mShutdown, NS_ERROR_NOT_INITIALIZED);
+
+    // Ensure storage table
+    CacheEntryTable* const entries =
+        sGlobalEntryTables
+            ->LookupOrInsertWith(
+                aContextKey,
+                [&aContextKey] {
+                  LOG(("  new storage entries table for context '%s'",
+                       aContextKey.BeginReading()));
+                  return MakeUnique<CacheEntryTable>(
+                      CacheEntryTable::ALL_ENTRIES);
+                })
+            .get();
+
+    bool entryExists = entries->Get(entryKey, getter_AddRefs(entry));
+    if (!entryExists && (aFlags & nsICacheStorage::OPEN_READONLY) &&
+        (aFlags & nsICacheStorage::OPEN_SECRETLY) &&
+        StaticPrefs::network_cache_bug1708673()) {
+      return NS_ERROR_CACHE_KEY_NOT_FOUND;
+    }
+
+    bool replace = aFlags & nsICacheStorage::OPEN_TRUNCATE;
+
+    if (entryExists && !replace) {
+      // check whether we want to turn this entry to a memory-only.
+      if (MOZ_UNLIKELY(!aWriteToDisk) && MOZ_LIKELY(entry->IsUsingDisk())) {
+        LOG(("  entry is persistent but we want mem-only, replacing it"));
+        replace = true;
+      }
+    }
+
+    // If truncate is demanded, delete and doom the current entry
+    if (entryExists && replace) {
+      entries->Remove(entryKey);
+
+      LOG(("  dooming entry %p for %s because of OPEN_TRUNCATE", entry.get(),
+           entryKey.get()));
+      // On purpose called under the lock to prevent races of doom and open on
+      // I/O thread No need to remove from both memory-only and all-entries
+      // tables.  The new entry will overwrite the shadow entry in its ctor.
+      entry->DoomAlreadyRemoved();
+
+      entry = nullptr;
+      entryExists = false;
+
+      // Would only lead to deleting force-valid timestamp again.  We don't need
+      // the replace information anymore after this point anyway.
+      replace = false;
+    }
+
+    // Ensure entry for the particular URL
+    if (!entryExists) {
+      // When replacing with a new entry, always remove the current force-valid
+      // timestamp, this is the only place to do it.
+      if (replace) {
+        RemoveEntryForceValid(aContextKey, entryKey);
+      }
+
+      // Entry is not in the hashtable or has just been truncated...
+      entry = new CacheEntry(aContextKey, aURI, aIdExtension, aWriteToDisk,
+                             aSkipSizeCheck, aPin);
+      entries->InsertOrUpdate(entryKey, RefPtr{entry});
+      LOG(("  new entry %p for %s", entry.get(), entryKey.get()));
+    }
+
+    if (entry) {
+      // Here, if this entry was not for a long time referenced by any consumer,
+      // gets again first 'handles count' reference.
+      handle = entry->NewHandle();
+    }
+  }
+
+  handle.forget(aResult);
+  return NS_OK;
+}
+
+nsresult CacheStorageService::CheckStorageEntry(CacheStorage const* aStorage,
+                                                const nsACString& aURI,
+                                                const nsACString& aIdExtension,
+                                                bool* aResult) {
+  nsresult rv;
+
+  nsAutoCString contextKey;
+  CacheFileUtils::AppendKeyPrefix(aStorage->LoadInfo(), contextKey);
+
+  if (!aStorage->WriteToDisk()) {
+    AppendMemoryStorageTag(contextKey);
+  }
+
+  LOG(("CacheStorageService::CheckStorageEntry [uri=%s, eid=%s, contextKey=%s]",
+       aURI.BeginReading(), aIdExtension.BeginReading(), contextKey.get()));
+
+  {
+    mozilla::MutexAutoLock lock(mLock);
+
+    NS_ENSURE_FALSE(mShutdown, NS_ERROR_NOT_INITIALIZED);
+
+    nsAutoCString entryKey;
+    rv = CacheEntry::HashingKey(""_ns, aIdExtension, aURI, entryKey);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    CacheEntryTable* entries;
+    if ((*aResult = sGlobalEntryTables->Get(contextKey, &entries)) &&
+        entries->GetWeak(entryKey, aResult)) {
+      LOG(("  found in hash tables"));
+      return NS_OK;
+    }
+  }
+
+  if (!aStorage->WriteToDisk()) {
+    // Memory entry, nothing more to do.
+    LOG(("  not found in hash tables"));
+    return NS_OK;
+  }
+
+  // Disk entry, not found in the hashtable, check the index.
+  nsAutoCString fileKey;
+  rv = CacheEntry::HashingKey(contextKey, aIdExtension, aURI, fileKey);
+
+  CacheIndex::EntryStatus status;
+  rv = CacheIndex::HasEntry(fileKey, &status);
+  if (NS_FAILED(rv) || status == CacheIndex::DO_NOT_KNOW) {
+    LOG(("  index doesn't know, rv=0x%08" PRIx32, static_cast<uint32_t>(rv)));
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  *aResult = status == CacheIndex::EXISTS;
+  LOG(("  %sfound in index", *aResult ? "" : "not "));
+  return NS_OK;
+}
+
+nsresult CacheStorageService::GetCacheIndexEntryAttrs(
+    CacheStorage const* aStorage, const nsACString& aURI,
+    const nsACString& aIdExtension, bool* aHasAltData, uint32_t* aFileSizeKb) {
+  nsresult rv;
+
+  nsAutoCString contextKey;
+  CacheFileUtils::AppendKeyPrefix(aStorage->LoadInfo(), contextKey);
+
+  LOG(
+      ("CacheStorageService::GetCacheIndexEntryAttrs [uri=%s, eid=%s, "
+       "contextKey=%s]",
+       aURI.BeginReading(), aIdExtension.BeginReading(), contextKey.get()));
+
+  nsAutoCString fileKey;
+  rv = CacheEntry::HashingKey(contextKey, aIdExtension, aURI, fileKey);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  *aHasAltData = false;
+  *aFileSizeKb = 0;
+  auto closure = [&aHasAltData, &aFileSizeKb](const CacheIndexEntry* entry) {
+    *aHasAltData = entry->GetHasAltData();
+    *aFileSizeKb = entry->GetFileSize();
+  };
+
+  CacheIndex::EntryStatus status;
+  rv = CacheIndex::HasEntry(fileKey, &status, closure);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  if (status != CacheIndex::EXISTS) {
+    return NS_ERROR_CACHE_KEY_NOT_FOUND;
+  }
+
+  return NS_OK;
+}
+
+namespace {
+
+class CacheEntryDoomByKeyCallback : public CacheFileIOListener,
+                                    public nsIRunnable {
+ public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSIRUNNABLE
+
+  explicit CacheEntryDoomByKeyCallback(nsICacheEntryDoomCallback* aCallback)
+      : mCallback(aCallback), mResult(NS_ERROR_NOT_INITIALIZED) {}
+
+ private:
+  virtual ~CacheEntryDoomByKeyCallback();
+
+  NS_IMETHOD OnFileOpened(CacheFileHandle* aHandle, nsresult aResult) override {
+    return NS_OK;
+  }
+  NS_IMETHOD OnDataWritten(CacheFileHandle* aHandle, const char* aBuf,
+                           nsresult aResult) override {
+    return NS_OK;
+  }
+  NS_IMETHOD OnDataRead(CacheFileHandle* aHandle, char* aBuf,
+                        nsresult aResult) override {
+    return NS_OK;
+  }
+  NS_IMETHOD OnFileDoomed(CacheFileHandle* aHandle, nsresult aResult) override;
+  NS_IMETHOD OnEOFSet(CacheFileHandle* aHandle, nsresult aResult) override {
+    return NS_OK;
+  }
+  NS_IMETHOD OnFileRenamed(CacheFileHandle* aHandle,
+                           nsresult aResult) override {
+    return NS_OK;
+  }
+
+  nsCOMPtr<nsICacheEntryDoomCallback> mCallback;
+  nsresult mResult;
+};
+
+CacheEntryDoomByKeyCallback::~CacheEntryDoomByKeyCallback() {
+  if (mCallback) {
+    ProxyReleaseMainThread("CacheEntryDoomByKeyCallback::mCallback", mCallback);
+  }
+}
+
+NS_IMETHODIMP CacheEntryDoomByKeyCallback::OnFileDoomed(
+    CacheFileHandle* aHandle, nsresult aResult) {
+  if (!mCallback) return NS_OK;
+
+  mResult = aResult;
+  if (NS_IsMainThread()) {
+    Run();
+  } else {
+    NS_DispatchToMainThread(this);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP CacheEntryDoomByKeyCallback::Run() {
+  mCallback->OnCacheEntryDoomed(mResult);
+  return NS_OK;
+}
+
+NS_IMPL_ISUPPORTS(CacheEntryDoomByKeyCallback, CacheFileIOListener,
+                  nsIRunnable);
+
+}  // namespace
+
+nsresult CacheStorageService::DoomStorageEntry(
+    CacheStorage const* aStorage, const nsACString& aURI,
+    const nsACString& aIdExtension, nsICacheEntryDoomCallback* aCallback) {
+  LOG(("CacheStorageService::DoomStorageEntry"));
+
+  NS_ENSURE_ARG(aStorage);
+
+  nsAutoCString contextKey;
+  CacheFileUtils::AppendKeyPrefix(aStorage->LoadInfo(), contextKey);
+
+  nsAutoCString entryKey;
+  nsresult rv = CacheEntry::HashingKey(""_ns, aIdExtension, aURI, entryKey);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  RefPtr<CacheEntry> entry;
+  {
+    mozilla::MutexAutoLock lock(mLock);
+
+    NS_ENSURE_FALSE(mShutdown, NS_ERROR_NOT_INITIALIZED);
+
+    CacheEntryTable* entries;
+    if (sGlobalEntryTables->Get(contextKey, &entries)) {
+      if (entries->Get(entryKey, getter_AddRefs(entry))) {
+        if (aStorage->WriteToDisk() || !entry->IsUsingDisk()) {
+          // When evicting from disk storage, purge
+          // When evicting from memory storage and the entry is memory-only,
+          // purge
+          LOG(
+              ("  purging entry %p for %s [storage use disk=%d, entry use "
+               "disk=%d]",
+               entry.get(), entryKey.get(), aStorage->WriteToDisk(),
+               entry->IsUsingDisk()));
+          entries->Remove(entryKey);
+        } else {
+          // Otherwise, leave it
+          LOG(
+              ("  leaving entry %p for %s [storage use disk=%d, entry use "
+               "disk=%d]",
+               entry.get(), entryKey.get(), aStorage->WriteToDisk(),
+               entry->IsUsingDisk()));
+          entry = nullptr;
+        }
+      }
+    }
+
+    if (!entry) {
+      RemoveEntryForceValid(contextKey, entryKey);
+    }
+  }
+
+  if (entry) {
+    LOG(("  dooming entry %p for %s", entry.get(), entryKey.get()));
+    return entry->AsyncDoom(aCallback);
+  }
+
+  LOG(("  no entry loaded for %s", entryKey.get()));
+
+  if (aStorage->WriteToDisk()) {
+    nsAutoCString contextKey;
+    CacheFileUtils::AppendKeyPrefix(aStorage->LoadInfo(), contextKey);
+
+    rv = CacheEntry::HashingKey(contextKey, aIdExtension, aURI, entryKey);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    LOG(("  dooming file only for %s", entryKey.get()));
+
+    RefPtr<CacheEntryDoomByKeyCallback> callback(
+        new CacheEntryDoomByKeyCallback(aCallback));
+    rv = CacheFileIOManager::DoomFileByKey(entryKey, callback);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    return NS_OK;
+  }
+
+  class Callback : public Runnable {
+   public:
+    explicit Callback(nsICacheEntryDoomCallback* aCallback)
+        : mozilla::Runnable("Callback"), mCallback(aCallback) {}
+    NS_IMETHOD Run() override {
+      mCallback->OnCacheEntryDoomed(NS_ERROR_NOT_AVAILABLE);
+      return NS_OK;
+    }
+    nsCOMPtr<nsICacheEntryDoomCallback> mCallback;
+  };
+
+  if (aCallback) {
+    RefPtr<Runnable> callback = new Callback(aCallback);
+    return NS_DispatchToMainThread(callback);
+  }
+
+  return NS_OK;
+}
+
+nsresult CacheStorageService::DoomStorageEntries(
+    CacheStorage const* aStorage, nsICacheEntryDoomCallback* aCallback) {
+  LOG(("CacheStorageService::DoomStorageEntries"));
+
+  NS_ENSURE_FALSE(mShutdown, NS_ERROR_NOT_INITIALIZED);
+  NS_ENSURE_ARG(aStorage);
+
+  nsAutoCString contextKey;
+  CacheFileUtils::AppendKeyPrefix(aStorage->LoadInfo(), contextKey);
+
+  mozilla::MutexAutoLock lock(mLock);
+
+  return DoomStorageEntries(contextKey, aStorage->LoadInfo(),
+                            aStorage->WriteToDisk(), aStorage->Pinning(),
+                            aCallback);
+}
+
+nsresult CacheStorageService::DoomStorageEntries(
+    const nsACString& aContextKey, nsILoadContextInfo* aContext,
+    bool aDiskStorage, bool aPinned, nsICacheEntryDoomCallback* aCallback) {
+  LOG(("CacheStorageService::DoomStorageEntries [context=%s]",
+       aContextKey.BeginReading()));
+
+  mLock.AssertCurrentThreadOwns();
+
+  NS_ENSURE_TRUE(!mShutdown, NS_ERROR_NOT_INITIALIZED);
+
+  nsAutoCString memoryStorageID(aContextKey);
+  AppendMemoryStorageTag(memoryStorageID);
+
+  if (aDiskStorage) {
+    LOG(("  dooming disk+memory storage of %s", aContextKey.BeginReading()));
+
+    // Walk one by one and remove entries according their pin status
+    CacheEntryTable *diskEntries, *memoryEntries;
+    if (sGlobalEntryTables->Get(aContextKey, &diskEntries)) {
+      sGlobalEntryTables->Get(memoryStorageID, &memoryEntries);
+
+      for (auto iter = diskEntries->Iter(); !iter.Done(); iter.Next()) {
+        auto entry = iter.Data();
+        if (entry->DeferOrBypassRemovalOnPinStatus(aPinned)) {
+          continue;
+        }
+
+        if (memoryEntries) {
+          RemoveExactEntry(memoryEntries, iter.Key(), entry, false);
+        }
+        iter.Remove();
+      }
+    }
+
+    if (aContext && !aContext->IsPrivate()) {
+      LOG(("  dooming disk entries"));
+      CacheFileIOManager::EvictByContext(aContext, aPinned, u""_ns);
+    }
+  } else {
+    LOG(("  dooming memory-only storage of %s", aContextKey.BeginReading()));
+
+    // Remove the memory entries table from the global tables.
+    // Since we store memory entries also in the disk entries table
+    // we need to remove the memory entries from the disk table one
+    // by one manually.
+    mozilla::UniquePtr<CacheEntryTable> memoryEntries;
+    sGlobalEntryTables->Remove(memoryStorageID, &memoryEntries);
+
+    CacheEntryTable* diskEntries;
+    if (memoryEntries && sGlobalEntryTables->Get(aContextKey, &diskEntries)) {
+      for (const auto& memoryEntry : *memoryEntries) {
+        const auto& entry = memoryEntry.GetData();
+        RemoveExactEntry(diskEntries, memoryEntry.GetKey(), entry, false);
+      }
+    }
+  }
+
+  {
+    mozilla::MutexAutoLock lock(mForcedValidEntriesLock);
+
+    if (aContext) {
+      for (auto iter = mForcedValidEntries.Iter(); !iter.Done(); iter.Next()) {
+        bool matches;
+        DebugOnly<nsresult> rv = CacheFileUtils::KeyMatchesLoadContextInfo(
+            iter.Key(), aContext, &matches);
+        MOZ_ASSERT(NS_SUCCEEDED(rv));
+
+        if (matches) {
+          iter.Remove();
+        }
+      }
+    } else {
+      mForcedValidEntries.Clear();
+    }
+  }
+
+  // An artificial callback.  This is a candidate for removal tho.  In the new
+  // cache any 'doom' or 'evict' function ensures that the entry or entries
+  // being doomed is/are not accessible after the function returns.  So there is
+  // probably no need for a callback - has no meaning.  But for compatibility
+  // with the old cache that is still in the tree we keep the API similar to be
+  // able to make tests as well as other consumers work for now.
+  class Callback : public Runnable {
+   public:
+    explicit Callback(nsICacheEntryDoomCallback* aCallback)
+        : mozilla::Runnable("Callback"), mCallback(aCallback) {}
+    NS_IMETHOD Run() override {
+      mCallback->OnCacheEntryDoomed(NS_OK);
+      return NS_OK;
+    }
+    nsCOMPtr<nsICacheEntryDoomCallback> mCallback;
+  };
+
+  if (aCallback) {
+    RefPtr<Runnable> callback = new Callback(aCallback);
+    return NS_DispatchToMainThread(callback);
+  }
+
+  return NS_OK;
+}
+
+nsresult CacheStorageService::WalkStorageEntries(
+    CacheStorage const* aStorage, bool aVisitEntries,
+    nsICacheStorageVisitor* aVisitor) {
+  LOG(("CacheStorageService::WalkStorageEntries [cb=%p, visitentries=%d]",
+       aVisitor, aVisitEntries));
+  NS_ENSURE_FALSE(mShutdown, NS_ERROR_NOT_INITIALIZED);
+
+  NS_ENSURE_ARG(aStorage);
+
+  if (aStorage->WriteToDisk()) {
+    RefPtr<WalkDiskCacheRunnable> event = new WalkDiskCacheRunnable(
+        aStorage->LoadInfo(), aVisitEntries, aVisitor);
+    return event->Walk();
+  }
+
+  RefPtr<WalkMemoryCacheRunnable> event = new WalkMemoryCacheRunnable(
+      aStorage->LoadInfo(), aVisitEntries, aVisitor);
+  return event->Walk();
+}
+
+void CacheStorageService::CacheFileDoomed(nsILoadContextInfo* aLoadContextInfo,
+                                          const nsACString& aIdExtension,
+                                          const nsACString& aURISpec) {
+  nsAutoCString contextKey;
+  CacheFileUtils::AppendKeyPrefix(aLoadContextInfo, contextKey);
+
+  nsAutoCString entryKey;
+  CacheEntry::HashingKey(""_ns, aIdExtension, aURISpec, entryKey);
+
+  mozilla::MutexAutoLock lock(mLock);
+
+  if (mShutdown) {
+    return;
+  }
+
+  CacheEntryTable* entries;
+  RefPtr<CacheEntry> entry;
+
+  if (sGlobalEntryTables->Get(contextKey, &entries) &&
+      entries->Get(entryKey, getter_AddRefs(entry))) {
+    if (entry->IsFileDoomed()) {
+      // Need to remove under the lock to avoid possible race leading
+      // to duplication of the entry per its key.
+      RemoveExactEntry(entries, entryKey, entry, false);
+      entry->DoomAlreadyRemoved();
+    }
+
+    // Entry found, but it's not the entry that has been found doomed
+    // by the lower eviction layer.  Just leave everything unchanged.
+    return;
+  }
+
+  RemoveEntryForceValid(contextKey, entryKey);
+}
+
+bool CacheStorageService::GetCacheEntryInfo(
+    nsILoadContextInfo* aLoadContextInfo, const nsACString& aIdExtension,
+    const nsACString& aURISpec, EntryInfoCallback* aCallback) {
+  nsAutoCString contextKey;
+  CacheFileUtils::AppendKeyPrefix(aLoadContextInfo, contextKey);
+
+  nsAutoCString entryKey;
+  CacheEntry::HashingKey(""_ns, aIdExtension, aURISpec, entryKey);
+
+  RefPtr<CacheEntry> entry;
+  {
+    mozilla::MutexAutoLock lock(mLock);
+
+    if (mShutdown) {
+      return false;
+    }
+
+    CacheEntryTable* entries;
+    if (!sGlobalEntryTables->Get(contextKey, &entries)) {
+      return false;
+    }
+
+    if (!entries->Get(entryKey, getter_AddRefs(entry))) {
+      return false;
+    }
+  }
+
+  GetCacheEntryInfo(entry, aCallback);
+  return true;
+}
+
+// static
+void CacheStorageService::GetCacheEntryInfo(CacheEntry* aEntry,
+                                            EntryInfoCallback* aCallback) {
+  nsCString const uriSpec = aEntry->GetURI();
+  nsCString const enhanceId = aEntry->GetEnhanceID();
+
+  nsAutoCString entryKey;
+  aEntry->HashingKeyWithStorage(entryKey);
+
+  nsCOMPtr<nsILoadContextInfo> info = CacheFileUtils::ParseKey(entryKey);
+
+  uint32_t dataSize;
+  if (NS_FAILED(aEntry->GetStorageDataSize(&dataSize))) {
+    dataSize = 0;
+  }
+  int64_t altDataSize;
+  if (NS_FAILED(aEntry->GetAltDataSize(&altDataSize))) {
+    altDataSize = 0;
+  }
+  uint32_t fetchCount;
+  if (NS_FAILED(aEntry->GetFetchCount(&fetchCount))) {
+    fetchCount = 0;
+  }
+  uint32_t lastModified;
+  if (NS_FAILED(aEntry->GetLastModified(&lastModified))) {
+    lastModified = 0;
+  }
+  uint32_t expirationTime;
+  if (NS_FAILED(aEntry->GetExpirationTime(&expirationTime))) {
+    expirationTime = 0;
+  }
+
+  aCallback->OnEntryInfo(uriSpec, enhanceId, dataSize, altDataSize, fetchCount,
+                         lastModified, expirationTime, aEntry->IsPinned(),
+                         info);
+}
+
+// static
+uint32_t CacheStorageService::CacheQueueSize(bool highPriority) {
+  RefPtr<CacheIOThread> thread = CacheFileIOManager::IOThread();
+  // The thread will be null at shutdown.
+  if (!thread) {
+    return 0;
+  }
+  return thread->QueueSize(highPriority);
+}
+
+// Telemetry collection
+
+namespace {
+
+bool TelemetryEntryKey(CacheEntry const* entry, nsAutoCString& key) {
+  nsAutoCString entryKey;
+  nsresult rv = entry->HashingKey(entryKey);
+  if (NS_FAILED(rv)) return false;
+
+  if (entry->GetStorageID().IsEmpty()) {
+    // Hopefully this will be const-copied, saves some memory
+    key = entryKey;
+  } else {
+    key.Assign(entry->GetStorageID());
+    key.Append(':');
+    key.Append(entryKey);
+  }
+
+  return true;
+}
+
+}  // namespace
+
+void CacheStorageService::TelemetryPrune(TimeStamp& now) {
+  static TimeDuration const oneMinute = TimeDuration::FromSeconds(60);
+  static TimeStamp dontPruneUntil = now + oneMinute;
+  if (now < dontPruneUntil) return;
+
+  static TimeDuration const fifteenMinutes = TimeDuration::FromSeconds(900);
+  for (auto iter = mPurgeTimeStamps.Iter(); !iter.Done(); iter.Next()) {
+    if (now - iter.Data() > fifteenMinutes) {
+      // We are not interested in resurrection of entries after 15 minutes
+      // of time.  This is also the limit for the telemetry.
+      iter.Remove();
+    }
+  }
+  dontPruneUntil = now + oneMinute;
+}
+
+void CacheStorageService::TelemetryRecordEntryCreation(
+    CacheEntry const* entry) {
+  MOZ_ASSERT(CacheStorageService::IsOnManagementThread());
+
+  nsAutoCString key;
+  if (!TelemetryEntryKey(entry, key)) return;
+
+  TimeStamp now = TimeStamp::NowLoRes();
+  TelemetryPrune(now);
+
+  // When an entry is craeted (registered actually) we check if there is
+  // a timestamp marked when this very same cache entry has been removed
+  // (deregistered) because of over-memory-limit purging.  If there is such
+  // a timestamp found accumulate telemetry on how long the entry was away.
+  TimeStamp timeStamp;
+  if (!mPurgeTimeStamps.Get(key, &timeStamp)) return;
+
+  mPurgeTimeStamps.Remove(key);
+
+  Telemetry::AccumulateTimeDelta(Telemetry::HTTP_CACHE_ENTRY_RELOAD_TIME,
+                                 timeStamp, TimeStamp::NowLoRes());
+}
+
+void CacheStorageService::TelemetryRecordEntryRemoval(CacheEntry* entry) {
+  MOZ_ASSERT(CacheStorageService::IsOnManagementThread());
+
+  // Doomed entries must not be considered, we are only interested in purged
+  // entries.  Note that the mIsDoomed flag is always set before deregistration
+  // happens.
+  if (entry->IsDoomed()) return;
+
+  nsAutoCString key;
+  if (!TelemetryEntryKey(entry, key)) return;
+
+  // When an entry is removed (deregistered actually) we put a timestamp for
+  // this entry to the hashtable so that when the entry is created (registered)
+  // again we know how long it was away.  Also accumulate number of AsyncOpen
+  // calls on the entry, this tells us how efficiently the pool actually works.
+
+  TimeStamp now = TimeStamp::NowLoRes();
+  TelemetryPrune(now);
+  mPurgeTimeStamps.InsertOrUpdate(key, now);
+
+  Telemetry::Accumulate(Telemetry::HTTP_CACHE_ENTRY_REUSE_COUNT,
+                        entry->UseCount());
+  Telemetry::AccumulateTimeDelta(Telemetry::HTTP_CACHE_ENTRY_ALIVE_TIME,
+                                 entry->LoadStart(), TimeStamp::NowLoRes());
+}
+
+// nsIMemoryReporter
+
+size_t CacheStorageService::SizeOfExcludingThis(
+    mozilla::MallocSizeOf mallocSizeOf) const {
+  CacheStorageService::Self()->Lock().AssertCurrentThreadOwns();
+
+  size_t n = 0;
+  // The elemets are referenced by sGlobalEntryTables and are reported from
+  // there
+  n += Pool(true).mFrecencyArray.ShallowSizeOfExcludingThis(mallocSizeOf);
+  n += Pool(true).mExpirationArray.ShallowSizeOfExcludingThis(mallocSizeOf);
+  n += Pool(false).mFrecencyArray.ShallowSizeOfExcludingThis(mallocSizeOf);
+  n += Pool(false).mExpirationArray.ShallowSizeOfExcludingThis(mallocSizeOf);
+  // Entries reported manually in CacheStorageService::CollectReports callback
+  if (sGlobalEntryTables) {
+    n += sGlobalEntryTables->ShallowSizeOfIncludingThis(mallocSizeOf);
+  }
+  n += mPurgeTimeStamps.SizeOfExcludingThis(mallocSizeOf);
+
+  return n;
+}
+
+size_t CacheStorageService::SizeOfIncludingThis(
+    mozilla::MallocSizeOf mallocSizeOf) const {
+  return mallocSizeOf(this) + SizeOfExcludingThis(mallocSizeOf);
+}
+
+NS_IMETHODIMP
+CacheStorageService::CollectReports(nsIHandleReportCallback* aHandleReport,
+                                    nsISupports* aData, bool aAnonymize) {
+  MutexAutoLock lock(mLock);
+  MOZ_COLLECT_REPORT("explicit/network/cache2/io", KIND_HEAP, UNITS_BYTES,
+                     CacheFileIOManager::SizeOfIncludingThis(MallocSizeOf),
+                     "Memory used by the cache IO manager.");
+
+  MOZ_COLLECT_REPORT("explicit/network/cache2/index", KIND_HEAP, UNITS_BYTES,
+                     CacheIndex::SizeOfIncludingThis(MallocSizeOf),
+                     "Memory used by the cache index.");
+
+  // Report the service instance, this doesn't report entries, done lower
+  MOZ_COLLECT_REPORT("explicit/network/cache2/service", KIND_HEAP, UNITS_BYTES,
+                     SizeOfIncludingThis(MallocSizeOf),
+                     "Memory used by the cache storage service.");
+
+  // Report all entries, each storage separately (by the context key)
+  //
+  // References are:
+  // sGlobalEntryTables to N CacheEntryTable
+  // CacheEntryTable to N CacheEntry
+  // CacheEntry to 1 CacheFile
+  // CacheFile to
+  //   N CacheFileChunk (keeping the actual data)
+  //   1 CacheFileMetadata (keeping http headers etc.)
+  //   1 CacheFileOutputStream
+  //   N CacheFileInputStream
+  if (sGlobalEntryTables) {
+    for (const auto& globalEntry : *sGlobalEntryTables) {
+      CacheStorageService::Self()->Lock().AssertCurrentThreadOwns();
+
+      CacheEntryTable* table = globalEntry.GetWeak();
+
+      size_t size = 0;
+      mozilla::MallocSizeOf mallocSizeOf = CacheStorageService::MallocSizeOf;
+
+      size += table->ShallowSizeOfIncludingThis(mallocSizeOf);
+      for (const auto& tableEntry : *table) {
+        size += tableEntry.GetKey().SizeOfExcludingThisIfUnshared(mallocSizeOf);
+
+        // Bypass memory-only entries, those will be reported when iterating the
+        // memory only table. Memory-only entries are stored in both ALL_ENTRIES
+        // and MEMORY_ONLY hashtables.
+        RefPtr<mozilla::net::CacheEntry> const& entry = tableEntry.GetData();
+        if (table->Type() == CacheEntryTable::MEMORY_ONLY ||
+            entry->IsUsingDisk()) {
+          size += entry->SizeOfIncludingThis(mallocSizeOf);
+        }
+      }
+
+      aHandleReport->Callback(
+          ""_ns,
+          nsPrintfCString(
+              "explicit/network/cache2/%s-storage(%s)",
+              table->Type() == CacheEntryTable::MEMORY_ONLY ? "memory" : "disk",
+              aAnonymize ? "<anonymized>"
+                         : globalEntry.GetKey().BeginReading()),
+          nsIMemoryReporter::KIND_HEAP, nsIMemoryReporter::UNITS_BYTES, size,
+          "Memory used by the cache storage."_ns, aData);
+    }
+  }
+
+  return NS_OK;
+}
+
+// nsICacheTesting
+
+NS_IMETHODIMP
+CacheStorageService::IOThreadSuspender::Run() {
+  MonitorAutoLock mon(mMon);
+  while (!mSignaled) {
+    mon.Wait();
+  }
+  return NS_OK;
+}
+
+void CacheStorageService::IOThreadSuspender::Notify() {
+  MonitorAutoLock mon(mMon);
+  mSignaled = true;
+  mon.Notify();
+}
+
+NS_IMETHODIMP
+CacheStorageService::SuspendCacheIOThread(uint32_t aLevel) {
+  RefPtr<CacheIOThread> thread = CacheFileIOManager::IOThread();
+  if (!thread) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  MOZ_ASSERT(!mActiveIOSuspender);
+  mActiveIOSuspender = new IOThreadSuspender();
+  return thread->Dispatch(mActiveIOSuspender, aLevel);
+}
+
+NS_IMETHODIMP
+CacheStorageService::ResumeCacheIOThread() {
+  MOZ_ASSERT(mActiveIOSuspender);
+
+  RefPtr<IOThreadSuspender> suspender;
+  suspender.swap(mActiveIOSuspender);
+  suspender->Notify();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+CacheStorageService::Flush(nsIObserver* aObserver) {
+  RefPtr<CacheIOThread> thread = CacheFileIOManager::IOThread();
+  if (!thread) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  nsCOMPtr<nsIObserverService> observerService =
+      mozilla::services::GetObserverService();
+  if (!observerService) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  // Adding as weak, the consumer is responsible to keep the reference
+  // until notified.
+  observerService->AddObserver(aObserver, "cacheservice:purge-memory-pools",
+                               false);
+
+  // This runnable will do the purging and when done, notifies the above
+  // observer. We dispatch it to the CLOSE level, so all data writes scheduled
+  // up to this time will be done before this purging happens.
+  RefPtr<CacheStorageService::PurgeFromMemoryRunnable> r =
+      new CacheStorageService::PurgeFromMemoryRunnable(this,
+                                                       CacheEntry::PURGE_WHOLE);
+
+  return thread->Dispatch(r, CacheIOThread::WRITE);
+}
+
+}  // namespace mozilla::net