forked from mirrors/gecko-dev
e70d76485c
The usage of cryptoHash consists of a complete set of Init, Update, and Finish, there's no reason to keep it around MozReview-Commit-ID: 7bT9IsWEM5m
1623 lines
47 KiB
C++
1623 lines
47 KiB
C++
//* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "Classifier.h"
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#include "LookupCacheV4.h"
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#include "nsIPrefBranch.h"
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#include "nsIPrefService.h"
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#include "nsISimpleEnumerator.h"
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#include "nsIRandomGenerator.h"
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#include "nsIInputStream.h"
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#include "nsISeekableStream.h"
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#include "nsIFile.h"
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#include "nsNetCID.h"
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#include "nsPrintfCString.h"
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#include "nsThreadUtils.h"
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#include "mozilla/Telemetry.h"
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#include "mozilla/IntegerPrintfMacros.h"
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#include "mozilla/Logging.h"
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#include "mozilla/SyncRunnable.h"
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#include "mozilla/Base64.h"
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#include "mozilla/Unused.h"
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#include "mozilla/UniquePtr.h"
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#include "nsIUrlClassifierUtils.h"
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#include "nsUrlClassifierDBService.h"
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// MOZ_LOG=UrlClassifierDbService:5
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extern mozilla::LazyLogModule gUrlClassifierDbServiceLog;
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#define LOG(args) MOZ_LOG(gUrlClassifierDbServiceLog, mozilla::LogLevel::Debug, args)
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#define LOG_ENABLED() MOZ_LOG_TEST(gUrlClassifierDbServiceLog, mozilla::LogLevel::Debug)
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#define STORE_DIRECTORY NS_LITERAL_CSTRING("safebrowsing")
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#define TO_DELETE_DIR_SUFFIX NS_LITERAL_CSTRING("-to_delete")
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#define BACKUP_DIR_SUFFIX NS_LITERAL_CSTRING("-backup")
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#define UPDATING_DIR_SUFFIX NS_LITERAL_CSTRING("-updating")
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#define METADATA_SUFFIX NS_LITERAL_CSTRING(".metadata")
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namespace mozilla {
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namespace safebrowsing {
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namespace {
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// A scoped-clearer for nsTArray<TableUpdate*>.
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// The owning elements will be deleted and the array itself
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// will be cleared on exiting the scope.
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class ScopedUpdatesClearer {
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public:
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explicit ScopedUpdatesClearer(nsTArray<TableUpdate*> *aUpdates)
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: mUpdatesArrayRef(aUpdates)
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{
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for (auto update : *aUpdates) {
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mUpdatesPointerHolder.AppendElement(update);
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}
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}
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~ScopedUpdatesClearer()
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{
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mUpdatesArrayRef->Clear();
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}
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private:
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nsTArray<TableUpdate*>* mUpdatesArrayRef;
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nsTArray<UniquePtr<TableUpdate>> mUpdatesPointerHolder;
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};
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} // End of unnamed namespace.
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void
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Classifier::SplitTables(const nsACString& str, nsTArray<nsCString>& tables)
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{
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tables.Clear();
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nsACString::const_iterator begin, iter, end;
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str.BeginReading(begin);
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str.EndReading(end);
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while (begin != end) {
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iter = begin;
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FindCharInReadable(',', iter, end);
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nsDependentCSubstring table = Substring(begin,iter);
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if (!table.IsEmpty()) {
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tables.AppendElement(Substring(begin, iter));
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}
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begin = iter;
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if (begin != end) {
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begin++;
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}
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}
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}
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nsresult
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Classifier::GetPrivateStoreDirectory(nsIFile* aRootStoreDirectory,
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const nsACString& aTableName,
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const nsACString& aProvider,
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nsIFile** aPrivateStoreDirectory)
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{
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NS_ENSURE_ARG_POINTER(aPrivateStoreDirectory);
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if (!StringEndsWith(aTableName, NS_LITERAL_CSTRING("-proto"))) {
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// Only V4 table names (ends with '-proto') would be stored
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// to per-provider sub-directory.
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nsCOMPtr<nsIFile>(aRootStoreDirectory).forget(aPrivateStoreDirectory);
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return NS_OK;
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}
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if (aProvider.IsEmpty()) {
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// When failing to get provider, just store in the root folder.
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nsCOMPtr<nsIFile>(aRootStoreDirectory).forget(aPrivateStoreDirectory);
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return NS_OK;
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}
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nsCOMPtr<nsIFile> providerDirectory;
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// Clone first since we are gonna create a new directory.
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nsresult rv = aRootStoreDirectory->Clone(getter_AddRefs(providerDirectory));
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NS_ENSURE_SUCCESS(rv, rv);
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// Append the provider name to the root store directory.
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rv = providerDirectory->AppendNative(aProvider);
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NS_ENSURE_SUCCESS(rv, rv);
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// Ensure existence of the provider directory.
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bool dirExists;
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rv = providerDirectory->Exists(&dirExists);
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NS_ENSURE_SUCCESS(rv, rv);
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if (!dirExists) {
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LOG(("Creating private directory for %s", nsCString(aTableName).get()));
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rv = providerDirectory->Create(nsIFile::DIRECTORY_TYPE, 0755);
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NS_ENSURE_SUCCESS(rv, rv);
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providerDirectory.forget(aPrivateStoreDirectory);
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return rv;
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}
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// Store directory exists. Check if it's a directory.
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bool isDir;
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rv = providerDirectory->IsDirectory(&isDir);
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NS_ENSURE_SUCCESS(rv, rv);
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if (!isDir) {
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return NS_ERROR_FILE_DESTINATION_NOT_DIR;
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}
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providerDirectory.forget(aPrivateStoreDirectory);
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return NS_OK;
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}
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Classifier::Classifier()
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: mIsTableRequestResultOutdated(true)
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, mUpdateInterrupted(true)
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{
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NS_NewNamedThread(NS_LITERAL_CSTRING("Classifier Update"),
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getter_AddRefs(mUpdateThread));
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}
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Classifier::~Classifier()
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{
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Close();
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}
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nsresult
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Classifier::SetupPathNames()
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{
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// Get the root directory where to store all the databases.
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nsresult rv = mCacheDirectory->Clone(getter_AddRefs(mRootStoreDirectory));
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NS_ENSURE_SUCCESS(rv, rv);
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rv = mRootStoreDirectory->AppendNative(STORE_DIRECTORY);
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NS_ENSURE_SUCCESS(rv, rv);
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// Make sure LookupCaches (which are persistent and survive updates)
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// are reading/writing in the right place. We will be moving their
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// files "underneath" them during backup/restore.
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for (uint32_t i = 0; i < mLookupCaches.Length(); i++) {
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mLookupCaches[i]->UpdateRootDirHandle(mRootStoreDirectory);
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}
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// Directory where to move a backup before an update.
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rv = mCacheDirectory->Clone(getter_AddRefs(mBackupDirectory));
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NS_ENSURE_SUCCESS(rv, rv);
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rv = mBackupDirectory->AppendNative(STORE_DIRECTORY + BACKUP_DIR_SUFFIX);
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NS_ENSURE_SUCCESS(rv, rv);
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// Directory where to be working on the update.
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rv = mCacheDirectory->Clone(getter_AddRefs(mUpdatingDirectory));
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NS_ENSURE_SUCCESS(rv, rv);
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rv = mUpdatingDirectory->AppendNative(STORE_DIRECTORY + UPDATING_DIR_SUFFIX);
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NS_ENSURE_SUCCESS(rv, rv);
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// Directory where to move the backup so we can atomically
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// delete (really move) it.
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rv = mCacheDirectory->Clone(getter_AddRefs(mToDeleteDirectory));
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NS_ENSURE_SUCCESS(rv, rv);
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rv = mToDeleteDirectory->AppendNative(STORE_DIRECTORY + TO_DELETE_DIR_SUFFIX);
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NS_ENSURE_SUCCESS(rv, rv);
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return NS_OK;
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}
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nsresult
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Classifier::CreateStoreDirectory()
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{
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// Ensure the safebrowsing directory exists.
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bool storeExists;
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nsresult rv = mRootStoreDirectory->Exists(&storeExists);
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NS_ENSURE_SUCCESS(rv, rv);
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if (!storeExists) {
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rv = mRootStoreDirectory->Create(nsIFile::DIRECTORY_TYPE, 0755);
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NS_ENSURE_SUCCESS(rv, rv);
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} else {
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bool storeIsDir;
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rv = mRootStoreDirectory->IsDirectory(&storeIsDir);
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NS_ENSURE_SUCCESS(rv, rv);
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if (!storeIsDir)
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return NS_ERROR_FILE_DESTINATION_NOT_DIR;
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}
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return NS_OK;
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}
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nsresult
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Classifier::Open(nsIFile& aCacheDirectory)
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{
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// Remember the Local profile directory.
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nsresult rv = aCacheDirectory.Clone(getter_AddRefs(mCacheDirectory));
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NS_ENSURE_SUCCESS(rv, rv);
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// Create the handles to the update and backup directories.
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rv = SetupPathNames();
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NS_ENSURE_SUCCESS(rv, rv);
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// Clean up any to-delete directories that haven't been deleted yet.
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// This is still required for backward compatibility.
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rv = CleanToDelete();
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NS_ENSURE_SUCCESS(rv, rv);
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// If we met a crash during the previous update, "safebrowsing-updating"
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// directory will exist and let's remove it.
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rv = mUpdatingDirectory->Remove(true);
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if (NS_SUCCEEDED(rv)) {
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// If the "safebrowsing-updating" exists, it implies a crash occurred
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// in the previous update.
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LOG(("We may have hit a crash in the previous update."));
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}
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// Check whether we have an incomplete update and recover from the
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// backup if so.
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rv = RecoverBackups();
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NS_ENSURE_SUCCESS(rv, rv);
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// Make sure the main store directory exists.
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rv = CreateStoreDirectory();
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NS_ENSURE_SUCCESS(rv, rv);
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// Build the list of know urlclassifier lists
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// XXX: Disk IO potentially on the main thread during startup
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RegenActiveTables();
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return NS_OK;
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}
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void
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Classifier::Close()
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{
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DropStores();
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}
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void
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Classifier::Reset()
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{
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MOZ_ASSERT(NS_GetCurrentThread() != mUpdateThread,
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"Reset() MUST NOT be called on update thread");
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LOG(("Reset() is called so we interrupt the update."));
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mUpdateInterrupted = true;
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auto resetFunc = [=] {
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DropStores();
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mRootStoreDirectory->Remove(true);
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mBackupDirectory->Remove(true);
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mUpdatingDirectory->Remove(true);
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mToDeleteDirectory->Remove(true);
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CreateStoreDirectory();
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RegenActiveTables();
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};
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if (!mUpdateThread) {
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LOG(("Async update has been disabled. Just Reset() on worker thread."));
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resetFunc();
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return;
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}
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nsCOMPtr<nsIRunnable> r =
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NS_NewRunnableFunction("safebrowsing::Classifier::Reset", resetFunc);
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SyncRunnable::DispatchToThread(mUpdateThread, r);
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}
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void
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Classifier::ResetTables(ClearType aType, const nsTArray<nsCString>& aTables)
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{
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for (uint32_t i = 0; i < aTables.Length(); i++) {
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LOG(("Resetting table: %s", aTables[i].get()));
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LookupCache *cache = GetLookupCache(aTables[i]);
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if (cache) {
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// Remove any cached Completes for this table if clear type is Clear_Cache
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if (aType == Clear_Cache) {
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cache->ClearCache();
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} else {
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cache->ClearAll();
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}
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}
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}
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// Clear on-disk database if clear type is Clear_All
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if (aType == Clear_All) {
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DeleteTables(mRootStoreDirectory, aTables);
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RegenActiveTables();
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}
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}
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void
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Classifier::DeleteTables(nsIFile* aDirectory, const nsTArray<nsCString>& aTables)
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{
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nsCOMPtr<nsISimpleEnumerator> entries;
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nsresult rv = aDirectory->GetDirectoryEntries(getter_AddRefs(entries));
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NS_ENSURE_SUCCESS_VOID(rv);
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bool hasMore;
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while (NS_SUCCEEDED(rv = entries->HasMoreElements(&hasMore)) && hasMore) {
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nsCOMPtr<nsISupports> supports;
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rv = entries->GetNext(getter_AddRefs(supports));
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NS_ENSURE_SUCCESS_VOID(rv);
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nsCOMPtr<nsIFile> file = do_QueryInterface(supports);
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NS_ENSURE_TRUE_VOID(file);
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// If |file| is a directory, recurse to find its entries as well.
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bool isDirectory;
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if (NS_FAILED(file->IsDirectory(&isDirectory))) {
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continue;
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}
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if (isDirectory) {
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DeleteTables(file, aTables);
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continue;
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}
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nsCString leafName;
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rv = file->GetNativeLeafName(leafName);
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NS_ENSURE_SUCCESS_VOID(rv);
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leafName.Truncate(leafName.RFind("."));
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if (aTables.Contains(leafName)) {
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if (NS_FAILED(file->Remove(false))) {
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NS_WARNING(nsPrintfCString("Fail to remove file %s from the disk",
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leafName.get()).get());
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}
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}
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}
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NS_ENSURE_SUCCESS_VOID(rv);
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}
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void
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Classifier::TableRequest(nsACString& aResult)
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{
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MOZ_ASSERT(!NS_IsMainThread(),
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"TableRequest must be called on the classifier worker thread.");
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// This function and all disk I/O are guaranteed to occur
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// on the same thread so we don't need to add a lock around.
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if (!mIsTableRequestResultOutdated) {
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aResult = mTableRequestResult;
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return;
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}
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// Generating v2 table info.
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nsTArray<nsCString> tables;
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ActiveTables(tables);
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for (uint32_t i = 0; i < tables.Length(); i++) {
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HashStore store(tables[i], GetProvider(tables[i]), mRootStoreDirectory);
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nsresult rv = store.Open();
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if (NS_FAILED(rv)) {
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continue;
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}
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ChunkSet &adds = store.AddChunks();
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ChunkSet &subs = store.SubChunks();
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// Open HashStore will always succeed even that is not a v2 table.
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// So skip tables without add and sub chunks.
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if (adds.Length() == 0 && subs.Length() == 0) {
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continue;
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}
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aResult.Append(store.TableName());
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aResult.Append(';');
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if (adds.Length() > 0) {
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aResult.AppendLiteral("a:");
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nsAutoCString addList;
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adds.Serialize(addList);
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aResult.Append(addList);
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}
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if (subs.Length() > 0) {
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if (adds.Length() > 0)
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aResult.Append(':');
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aResult.AppendLiteral("s:");
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nsAutoCString subList;
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subs.Serialize(subList);
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aResult.Append(subList);
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}
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aResult.Append('\n');
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}
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// Load meta data from *.metadata files in the root directory.
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// Specifically for v4 tables.
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nsCString metadata;
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nsresult rv = LoadMetadata(mRootStoreDirectory, metadata);
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if (NS_SUCCEEDED(rv)) {
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aResult.Append(metadata);
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}
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// Update the TableRequest result in-memory cache.
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mTableRequestResult = aResult;
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mIsTableRequestResultOutdated = false;
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}
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nsresult
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Classifier::Check(const nsACString& aSpec,
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const nsACString& aTables,
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LookupResultArray& aResults)
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{
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Telemetry::AutoTimer<Telemetry::URLCLASSIFIER_CL_CHECK_TIME> timer;
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// Get the set of fragments based on the url. This is necessary because we
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// only look up at most 5 URLs per aSpec, even if aSpec has more than 5
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// components.
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nsTArray<nsCString> fragments;
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nsresult rv = LookupCache::GetLookupFragments(aSpec, &fragments);
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NS_ENSURE_SUCCESS(rv, rv);
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nsTArray<nsCString> activeTables;
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SplitTables(aTables, activeTables);
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nsTArray<LookupCache*> cacheArray;
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for (uint32_t i = 0; i < activeTables.Length(); i++) {
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LOG(("Checking table %s", activeTables[i].get()));
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LookupCache *cache = GetLookupCache(activeTables[i]);
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if (cache) {
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cacheArray.AppendElement(cache);
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} else {
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return NS_ERROR_FAILURE;
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}
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}
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// Now check each lookup fragment against the entries in the DB.
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for (uint32_t i = 0; i < fragments.Length(); i++) {
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Completion lookupHash;
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lookupHash.FromPlaintext(fragments[i]);
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if (LOG_ENABLED()) {
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nsAutoCString checking;
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lookupHash.ToHexString(checking);
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LOG(("Checking fragment %s, hash %s (%X)", fragments[i].get(),
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checking.get(), lookupHash.ToUint32()));
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}
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for (uint32_t i = 0; i < cacheArray.Length(); i++) {
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LookupCache *cache = cacheArray[i];
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bool has, confirmed;
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uint32_t matchLength;
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rv = cache->Has(lookupHash, &has, &matchLength, &confirmed);
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NS_ENSURE_SUCCESS(rv, rv);
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if (has) {
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LookupResult *result = aResults.AppendElement(fallible);
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if (!result) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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LOG(("Found a result in %s: %s",
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cache->TableName().get(),
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confirmed ? "confirmed." : "Not confirmed."));
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result->hash.complete = lookupHash;
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result->mConfirmed = confirmed;
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result->mTableName.Assign(cache->TableName());
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result->mPartialHashLength = confirmed ? COMPLETE_SIZE : matchLength;
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result->mProtocolV2 = LookupCache::Cast<LookupCacheV2>(cache);
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}
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}
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}
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return NS_OK;
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}
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static nsresult
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SwapDirectoryContent(nsIFile* aDir1,
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nsIFile* aDir2,
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nsIFile* aParentDir,
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nsIFile* aTempDir)
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{
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// Pre-condition: |aDir1| and |aDir2| are directory and their parent
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// are both |aParentDir|.
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//
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// Post-condition: The locations where aDir1 and aDir2 point to will not
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// change but their contents will be exchanged. If we failed
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// to swap their content, everything will be rolled back.
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nsAutoCString tempDirName;
|
|
aTempDir->GetNativeLeafName(tempDirName);
|
|
|
|
nsresult rv;
|
|
|
|
nsAutoCString dirName1, dirName2;
|
|
aDir1->GetNativeLeafName(dirName1);
|
|
aDir2->GetNativeLeafName(dirName2);
|
|
|
|
LOG(("Swapping directories %s and %s...", dirName1.get(),
|
|
dirName2.get()));
|
|
|
|
// 1. Rename "dirName1" to "temp"
|
|
rv = aDir1->RenameToNative(nullptr, tempDirName);
|
|
if (NS_FAILED(rv)) {
|
|
LOG(("Unable to rename %s to %s", dirName1.get(),
|
|
tempDirName.get()));
|
|
return rv; // Nothing to roll back.
|
|
}
|
|
|
|
// 1.1. Create a handle for temp directory. This is required since
|
|
// |nsIFile.rename| will not change the location where the
|
|
// object points to.
|
|
nsCOMPtr<nsIFile> tempDirectory;
|
|
rv = aParentDir->Clone(getter_AddRefs(tempDirectory));
|
|
rv = tempDirectory->AppendNative(tempDirName);
|
|
|
|
// 2. Rename "dirName2" to "dirName1".
|
|
rv = aDir2->RenameToNative(nullptr, dirName1);
|
|
if (NS_FAILED(rv)) {
|
|
LOG(("Failed to rename %s to %s. Rename temp directory back to %s",
|
|
dirName2.get(), dirName1.get(), dirName1.get()));
|
|
nsresult rbrv = tempDirectory->RenameToNative(nullptr, dirName1);
|
|
NS_ENSURE_SUCCESS(rbrv, rbrv);
|
|
return rv;
|
|
}
|
|
|
|
// 3. Rename "temp" to "dirName2".
|
|
rv = tempDirectory->RenameToNative(nullptr, dirName2);
|
|
if (NS_FAILED(rv)) {
|
|
LOG(("Failed to rename temp directory to %s. ", dirName2.get()));
|
|
// We've done (1) renaming "dir1 to temp" and
|
|
// (2) renaming "dir2 to dir1"
|
|
// so the rollback is
|
|
// (1) renaming "dir1 to dir2" and
|
|
// (2) renaming "temp to dir1"
|
|
nsresult rbrv; // rollback result
|
|
rbrv = aDir1->RenameToNative(nullptr, dirName2);
|
|
NS_ENSURE_SUCCESS(rbrv, rbrv);
|
|
rbrv = tempDirectory->RenameToNative(nullptr, dirName1);
|
|
NS_ENSURE_SUCCESS(rbrv, rbrv);
|
|
return rv;
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
Classifier::RemoveUpdateIntermediaries()
|
|
{
|
|
// Remove old LookupCaches.
|
|
for (auto c: mNewLookupCaches) {
|
|
delete c;
|
|
}
|
|
mNewLookupCaches.Clear();
|
|
|
|
// Remove the "old" directory. (despite its looking-new name)
|
|
if (NS_FAILED(mUpdatingDirectory->Remove(true))) {
|
|
// If the directory is locked from removal for some reason,
|
|
// we will fail here and it doesn't matter until the next
|
|
// update. (the next udpate will fail due to the removable
|
|
// "safebrowsing-udpating" directory.)
|
|
LOG(("Failed to remove updating directory."));
|
|
}
|
|
}
|
|
|
|
void
|
|
Classifier::CopyAndInvalidateFullHashCache()
|
|
{
|
|
MOZ_ASSERT(NS_GetCurrentThread() != mUpdateThread,
|
|
"CopyAndInvalidateFullHashCache cannot be called on update thread "
|
|
"since it mutates mLookupCaches which is only safe on "
|
|
"worker thread.");
|
|
|
|
// New lookup caches are built from disk, data likes cache which is
|
|
// generated online won't exist. We have to manually copy cache from
|
|
// old LookupCache to new LookupCache.
|
|
for (auto& newCache: mNewLookupCaches) {
|
|
for (auto& oldCache: mLookupCaches) {
|
|
if (oldCache->TableName() == newCache->TableName()) {
|
|
newCache->CopyFullHashCache(oldCache);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Clear cache when update.
|
|
// Invalidate cache entries in CopyAndInvalidateFullHashCache because only
|
|
// at this point we will have cache data in LookupCache.
|
|
for (auto& newCache: mNewLookupCaches) {
|
|
newCache->InvalidateExpiredCacheEntries();
|
|
}
|
|
}
|
|
|
|
void
|
|
Classifier::MergeNewLookupCaches()
|
|
{
|
|
MOZ_ASSERT(NS_GetCurrentThread() != mUpdateThread,
|
|
"MergeNewLookupCaches cannot be called on update thread "
|
|
"since it mutates mLookupCaches which is only safe on "
|
|
"worker thread.");
|
|
|
|
for (auto& newCache: mNewLookupCaches) {
|
|
// For each element in mNewLookCaches, it will be swapped with
|
|
// - An old cache in mLookupCache with the same table name or
|
|
// - nullptr (mLookupCache will be expaned) otherwise.
|
|
size_t swapIndex = 0;
|
|
for (; swapIndex < mLookupCaches.Length(); swapIndex++) {
|
|
if (mLookupCaches[swapIndex]->TableName() == newCache->TableName()) {
|
|
break;
|
|
}
|
|
}
|
|
if (swapIndex == mLookupCaches.Length()) {
|
|
mLookupCaches.AppendElement(nullptr);
|
|
}
|
|
|
|
Swap(mLookupCaches[swapIndex], newCache);
|
|
mLookupCaches[swapIndex]->UpdateRootDirHandle(mRootStoreDirectory);
|
|
}
|
|
|
|
// At this point, mNewLookupCaches's length remains the same but
|
|
// will contain either old cache (override) or nullptr (append).
|
|
}
|
|
|
|
nsresult
|
|
Classifier::SwapInNewTablesAndCleanup()
|
|
{
|
|
nsresult rv;
|
|
|
|
// Step 1. Swap in on-disk tables. The idea of using "safebrowsing-backup"
|
|
// as the intermediary directory is we can get databases recovered if
|
|
// crash occurred in any step of the swap. (We will recover from
|
|
// "safebrowsing-backup" in OpenDb().)
|
|
rv = SwapDirectoryContent(mUpdatingDirectory, // contains new tables
|
|
mRootStoreDirectory, // contains old tables
|
|
mCacheDirectory, // common parent dir
|
|
mBackupDirectory); // intermediary dir for swap
|
|
if (NS_FAILED(rv)) {
|
|
LOG(("Failed to swap in on-disk tables."));
|
|
RemoveUpdateIntermediaries();
|
|
return rv;
|
|
}
|
|
|
|
// Step 2. Merge mNewLookupCaches into mLookupCaches. The outdated
|
|
// LookupCaches will be stored in mNewLookupCaches and be cleaned
|
|
// up later.
|
|
MergeNewLookupCaches();
|
|
|
|
// Step 3. Re-generate active tables based on on-disk tables.
|
|
rv = RegenActiveTables();
|
|
if (NS_FAILED(rv)) {
|
|
LOG(("Failed to re-generate active tables!"));
|
|
}
|
|
|
|
// Step 4. Clean up intermediaries for update.
|
|
RemoveUpdateIntermediaries();
|
|
|
|
// Step 5. Invalidate cached tableRequest request.
|
|
mIsTableRequestResultOutdated = true;
|
|
|
|
LOG(("Done swap in updated tables."));
|
|
|
|
return rv;
|
|
}
|
|
|
|
void Classifier::FlushAndDisableAsyncUpdate()
|
|
{
|
|
LOG(("Classifier::FlushAndDisableAsyncUpdate [%p, %p]", this, mUpdateThread.get()));
|
|
|
|
if (!mUpdateThread) {
|
|
LOG(("Async update has been disabled."));
|
|
return;
|
|
}
|
|
|
|
mUpdateThread->Shutdown();
|
|
mUpdateThread = nullptr;
|
|
}
|
|
|
|
nsresult
|
|
Classifier::AsyncApplyUpdates(nsTArray<TableUpdate*>* aUpdates,
|
|
const AsyncUpdateCallback& aCallback)
|
|
{
|
|
LOG(("Classifier::AsyncApplyUpdates"));
|
|
|
|
if (!mUpdateThread) {
|
|
LOG(("Async update has already been disabled."));
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Caller thread | Update thread
|
|
// --------------------------------------------------------
|
|
// | ApplyUpdatesBackground
|
|
// (processing other task) | (bg-update done. ping back to caller thread)
|
|
// (processing other task) | idle...
|
|
// ApplyUpdatesForeground |
|
|
// callback |
|
|
|
|
mUpdateInterrupted = false;
|
|
nsresult rv = mRootStoreDirectory->Clone(getter_AddRefs(mRootStoreDirectoryForUpdate));
|
|
if (NS_FAILED(rv)) {
|
|
LOG(("Failed to clone mRootStoreDirectory for update."));
|
|
return rv;
|
|
}
|
|
|
|
nsCOMPtr<nsIThread> callerThread = NS_GetCurrentThread();
|
|
MOZ_ASSERT(callerThread != mUpdateThread);
|
|
|
|
nsCOMPtr<nsIRunnable> bgRunnable =
|
|
NS_NewRunnableFunction("safebrowsing::Classifier::AsyncApplyUpdates", [=] {
|
|
MOZ_ASSERT(NS_GetCurrentThread() == mUpdateThread,
|
|
"MUST be on update thread");
|
|
|
|
LOG(("Step 1. ApplyUpdatesBackground on update thread."));
|
|
nsCString failedTableName;
|
|
nsresult bgRv = ApplyUpdatesBackground(aUpdates, failedTableName);
|
|
|
|
nsCOMPtr<nsIRunnable> fgRunnable = NS_NewRunnableFunction(
|
|
"safebrowsing::Classifier::AsyncApplyUpdates", [=] {
|
|
MOZ_ASSERT(NS_GetCurrentThread() == callerThread,
|
|
"MUST be on caller thread");
|
|
|
|
LOG(("Step 2. ApplyUpdatesForeground on caller thread"));
|
|
nsresult rv = ApplyUpdatesForeground(bgRv, failedTableName);
|
|
;
|
|
|
|
LOG(("Step 3. Updates applied! Fire callback."));
|
|
|
|
aCallback(rv);
|
|
});
|
|
callerThread->Dispatch(fgRunnable, NS_DISPATCH_NORMAL);
|
|
});
|
|
|
|
return mUpdateThread->Dispatch(bgRunnable, NS_DISPATCH_NORMAL);
|
|
}
|
|
|
|
nsresult
|
|
Classifier::ApplyUpdatesBackground(nsTArray<TableUpdate*>* aUpdates,
|
|
nsACString& aFailedTableName)
|
|
{
|
|
// |mUpdateInterrupted| is guaranteed to have been unset.
|
|
// If |mUpdateInterrupted| is set at any point, Reset() must have
|
|
// been called then we need to interrupt the update process.
|
|
// We only add checkpoints for non-trivial tasks.
|
|
|
|
if (!aUpdates || aUpdates->Length() == 0) {
|
|
return NS_OK;
|
|
}
|
|
|
|
nsCOMPtr<nsIUrlClassifierUtils> urlUtil =
|
|
do_GetService(NS_URLCLASSIFIERUTILS_CONTRACTID);
|
|
|
|
nsCString provider;
|
|
// Assume all TableUpdate objects should have the same provider.
|
|
urlUtil->GetTelemetryProvider((*aUpdates)[0]->TableName(), provider);
|
|
|
|
Telemetry::AutoTimer<Telemetry::URLCLASSIFIER_CL_KEYED_UPDATE_TIME>
|
|
keyedTimer(provider);
|
|
|
|
PRIntervalTime clockStart = 0;
|
|
if (LOG_ENABLED()) {
|
|
clockStart = PR_IntervalNow();
|
|
}
|
|
|
|
nsresult rv;
|
|
|
|
{
|
|
ScopedUpdatesClearer scopedUpdatesClearer(aUpdates);
|
|
|
|
{
|
|
// Check point 1: Copying file takes time so we check here.
|
|
if (mUpdateInterrupted) {
|
|
LOG(("Update is interrupted. Don't copy files."));
|
|
return NS_OK;
|
|
}
|
|
|
|
rv = CopyInUseDirForUpdate(); // i.e. mUpdatingDirectory will be setup.
|
|
if (NS_FAILED(rv)) {
|
|
LOG(("Failed to copy in-use directory for update."));
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
LOG(("Applying %zu table updates.", aUpdates->Length()));
|
|
|
|
for (uint32_t i = 0; i < aUpdates->Length(); i++) {
|
|
// Previous UpdateHashStore() may have consumed this update..
|
|
if ((*aUpdates)[i]) {
|
|
// Run all updates for one table
|
|
nsCString updateTable(aUpdates->ElementAt(i)->TableName());
|
|
|
|
// Check point 2: Processing downloaded data takes time.
|
|
if (mUpdateInterrupted) {
|
|
LOG(("Update is interrupted. Stop building new tables."));
|
|
return NS_OK;
|
|
}
|
|
|
|
// Will update the mirrored in-memory and on-disk databases.
|
|
if (TableUpdate::Cast<TableUpdateV2>((*aUpdates)[i])) {
|
|
rv = UpdateHashStore(aUpdates, updateTable);
|
|
} else {
|
|
rv = UpdateTableV4(aUpdates, updateTable);
|
|
}
|
|
|
|
if (NS_FAILED(rv)) {
|
|
aFailedTableName = updateTable;
|
|
RemoveUpdateIntermediaries();
|
|
return rv;
|
|
}
|
|
}
|
|
}
|
|
|
|
} // End of scopedUpdatesClearer scope.
|
|
|
|
if (LOG_ENABLED()) {
|
|
PRIntervalTime clockEnd = PR_IntervalNow();
|
|
LOG(("update took %dms\n",
|
|
PR_IntervalToMilliseconds(clockEnd - clockStart)));
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
Classifier::ApplyUpdatesForeground(nsresult aBackgroundRv,
|
|
const nsACString& aFailedTableName)
|
|
{
|
|
if (mUpdateInterrupted) {
|
|
LOG(("Update is interrupted! Just remove update intermediaries."));
|
|
RemoveUpdateIntermediaries();
|
|
return NS_OK;
|
|
}
|
|
if (NS_SUCCEEDED(aBackgroundRv)) {
|
|
// Copy and Invalidate fullhash cache here because this call requires
|
|
// mLookupCaches which is only available on work-thread
|
|
CopyAndInvalidateFullHashCache();
|
|
|
|
return SwapInNewTablesAndCleanup();
|
|
}
|
|
if (NS_ERROR_OUT_OF_MEMORY != aBackgroundRv) {
|
|
ResetTables(Clear_All, nsTArray<nsCString> { nsCString(aFailedTableName) });
|
|
}
|
|
return aBackgroundRv;
|
|
}
|
|
|
|
nsresult
|
|
Classifier::ApplyFullHashes(nsTArray<TableUpdate*>* aUpdates)
|
|
{
|
|
LOG(("Applying %zu table gethashes.", aUpdates->Length()));
|
|
|
|
ScopedUpdatesClearer scopedUpdatesClearer(aUpdates);
|
|
for (uint32_t i = 0; i < aUpdates->Length(); i++) {
|
|
TableUpdate *update = aUpdates->ElementAt(i);
|
|
|
|
nsresult rv = UpdateCache(update);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
aUpdates->ElementAt(i) = nullptr;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
Classifier::GetCacheInfo(const nsACString& aTable,
|
|
nsIUrlClassifierCacheInfo** aCache)
|
|
{
|
|
LookupCache* lookupCache = GetLookupCache(aTable);
|
|
if (!lookupCache) {
|
|
return;
|
|
}
|
|
|
|
lookupCache->GetCacheInfo(aCache);
|
|
}
|
|
|
|
void
|
|
Classifier::DropStores()
|
|
{
|
|
for (uint32_t i = 0; i < mLookupCaches.Length(); i++) {
|
|
delete mLookupCaches[i];
|
|
}
|
|
mLookupCaches.Clear();
|
|
}
|
|
|
|
nsresult
|
|
Classifier::RegenActiveTables()
|
|
{
|
|
mActiveTablesCache.Clear();
|
|
|
|
nsTArray<nsCString> foundTables;
|
|
ScanStoreDir(mRootStoreDirectory, foundTables);
|
|
|
|
for (uint32_t i = 0; i < foundTables.Length(); i++) {
|
|
nsCString table(foundTables[i]);
|
|
|
|
LookupCache *lookupCache = GetLookupCache(table);
|
|
if (!lookupCache) {
|
|
continue;
|
|
}
|
|
|
|
if (!lookupCache->IsPrimed()) {
|
|
continue;
|
|
}
|
|
|
|
if (LookupCache::Cast<LookupCacheV4>(lookupCache)) {
|
|
LOG(("Active v4 table: %s", table.get()));
|
|
} else {
|
|
HashStore store(table, GetProvider(table), mRootStoreDirectory);
|
|
|
|
nsresult rv = store.Open();
|
|
if (NS_FAILED(rv)) {
|
|
continue;
|
|
}
|
|
|
|
const ChunkSet &adds = store.AddChunks();
|
|
const ChunkSet &subs = store.SubChunks();
|
|
|
|
if (adds.Length() == 0 && subs.Length() == 0) {
|
|
continue;
|
|
}
|
|
|
|
LOG(("Active v2 table: %s", store.TableName().get()));
|
|
}
|
|
|
|
mActiveTablesCache.AppendElement(table);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
Classifier::ScanStoreDir(nsIFile* aDirectory, nsTArray<nsCString>& aTables)
|
|
{
|
|
nsCOMPtr<nsISimpleEnumerator> entries;
|
|
nsresult rv = aDirectory->GetDirectoryEntries(getter_AddRefs(entries));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
bool hasMore;
|
|
while (NS_SUCCEEDED(rv = entries->HasMoreElements(&hasMore)) && hasMore) {
|
|
nsCOMPtr<nsISupports> supports;
|
|
rv = entries->GetNext(getter_AddRefs(supports));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsCOMPtr<nsIFile> file = do_QueryInterface(supports);
|
|
|
|
// If |file| is a directory, recurse to find its entries as well.
|
|
bool isDirectory;
|
|
if (NS_FAILED(file->IsDirectory(&isDirectory))) {
|
|
continue;
|
|
}
|
|
if (isDirectory) {
|
|
ScanStoreDir(file, aTables);
|
|
continue;
|
|
}
|
|
|
|
nsCString leafName;
|
|
rv = file->GetNativeLeafName(leafName);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// Both v2 and v4 contain .pset file
|
|
nsCString suffix(NS_LITERAL_CSTRING(".pset"));
|
|
|
|
int32_t dot = leafName.RFind(suffix);
|
|
if (dot != -1) {
|
|
leafName.Cut(dot, suffix.Length());
|
|
aTables.AppendElement(leafName);
|
|
}
|
|
}
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
Classifier::ActiveTables(nsTArray<nsCString>& aTables)
|
|
{
|
|
aTables = mActiveTablesCache;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
Classifier::CleanToDelete()
|
|
{
|
|
bool exists;
|
|
nsresult rv = mToDeleteDirectory->Exists(&exists);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (exists) {
|
|
rv = mToDeleteDirectory->Remove(true);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
#ifdef MOZ_SAFEBROWSING_DUMP_FAILED_UPDATES
|
|
|
|
already_AddRefed<nsIFile>
|
|
Classifier::GetFailedUpdateDirectroy()
|
|
{
|
|
nsCString failedUpdatekDirName = STORE_DIRECTORY + nsCString("-failedupdate");
|
|
|
|
nsCOMPtr<nsIFile> failedUpdatekDirectory;
|
|
if (NS_FAILED(mCacheDirectory->Clone(getter_AddRefs(failedUpdatekDirectory))) ||
|
|
NS_FAILED(failedUpdatekDirectory->AppendNative(failedUpdatekDirName))) {
|
|
LOG(("Failed to init failedUpdatekDirectory."));
|
|
return nullptr;
|
|
}
|
|
|
|
return failedUpdatekDirectory.forget();
|
|
}
|
|
|
|
nsresult
|
|
Classifier::DumpRawTableUpdates(const nsACString& aRawUpdates)
|
|
{
|
|
LOG(("Dumping raw table updates..."));
|
|
|
|
DumpFailedUpdate();
|
|
|
|
nsCOMPtr<nsIFile> failedUpdatekDirectory = GetFailedUpdateDirectroy();
|
|
|
|
// Create tableupdate.bin and dump raw table update data.
|
|
nsCOMPtr<nsIFile> rawTableUpdatesFile;
|
|
nsCOMPtr<nsIOutputStream> outputStream;
|
|
if (NS_FAILED(failedUpdatekDirectory->Clone(getter_AddRefs(rawTableUpdatesFile))) ||
|
|
NS_FAILED(rawTableUpdatesFile->AppendNative(nsCString("tableupdates.bin"))) ||
|
|
NS_FAILED(NS_NewLocalFileOutputStream(getter_AddRefs(outputStream),
|
|
rawTableUpdatesFile,
|
|
PR_WRONLY | PR_TRUNCATE | PR_CREATE_FILE))) {
|
|
LOG(("Failed to create file to dump raw table updates."));
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Write out the data.
|
|
uint32_t written;
|
|
nsresult rv = outputStream->Write(aRawUpdates.BeginReading(),
|
|
aRawUpdates.Length(), &written);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
NS_ENSURE_TRUE(written == aRawUpdates.Length(), NS_ERROR_FAILURE);
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
Classifier::DumpFailedUpdate()
|
|
{
|
|
LOG(("Dumping failed update..."));
|
|
|
|
nsCOMPtr<nsIFile> failedUpdatekDirectory = GetFailedUpdateDirectroy();
|
|
|
|
// Remove the "failed update" directory no matter it exists or not.
|
|
// Failure is fine because the directory may not exist.
|
|
failedUpdatekDirectory->Remove(true);
|
|
|
|
nsCString failedUpdatekDirName;
|
|
nsresult rv = failedUpdatekDirectory->GetNativeLeafName(failedUpdatekDirName);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// Copy the in-use directory to a clean "failed update" directory.
|
|
nsCOMPtr<nsIFile> inUseDirectory;
|
|
if (NS_FAILED(mRootStoreDirectory->Clone(getter_AddRefs(inUseDirectory))) ||
|
|
NS_FAILED(inUseDirectory->CopyToNative(nullptr, failedUpdatekDirName))) {
|
|
LOG(("Failed to move in-use to the \"failed update\" directory %s",
|
|
failedUpdatekDirName.get()));
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
#endif // MOZ_SAFEBROWSING_DUMP_FAILED_UPDATES
|
|
|
|
nsresult
|
|
Classifier::CopyInUseDirForUpdate()
|
|
{
|
|
LOG(("Copy in-use directory content for update."));
|
|
|
|
// We copy everything from in-use directory to a temporary directory
|
|
// for updating.
|
|
|
|
nsCString updatingDirName;
|
|
nsresult rv = mUpdatingDirectory->GetNativeLeafName(updatingDirName);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// Remove the destination directory first (just in case) the do the copy.
|
|
mUpdatingDirectory->Remove(true);
|
|
if (!mRootStoreDirectoryForUpdate) {
|
|
LOG(("mRootStoreDirectoryForUpdate is null."));
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
rv = mRootStoreDirectoryForUpdate->CopyToNative(nullptr, updatingDirName);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
Classifier::RecoverBackups()
|
|
{
|
|
bool backupExists;
|
|
nsresult rv = mBackupDirectory->Exists(&backupExists);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (backupExists) {
|
|
// Remove the safebrowsing dir if it exists
|
|
nsCString storeDirName;
|
|
rv = mRootStoreDirectory->GetNativeLeafName(storeDirName);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
bool storeExists;
|
|
rv = mRootStoreDirectory->Exists(&storeExists);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (storeExists) {
|
|
rv = mRootStoreDirectory->Remove(true);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
// Move the backup to the store location
|
|
rv = mBackupDirectory->MoveToNative(nullptr, storeDirName);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// mBackupDirectory now points to storeDir, fix up.
|
|
rv = SetupPathNames();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
bool
|
|
Classifier::CheckValidUpdate(nsTArray<TableUpdate*>* aUpdates,
|
|
const nsACString& aTable)
|
|
{
|
|
// take the quick exit if there is no valid update for us
|
|
// (common case)
|
|
uint32_t validupdates = 0;
|
|
|
|
for (uint32_t i = 0; i < aUpdates->Length(); i++) {
|
|
TableUpdate *update = aUpdates->ElementAt(i);
|
|
if (!update || !update->TableName().Equals(aTable))
|
|
continue;
|
|
if (update->Empty()) {
|
|
aUpdates->ElementAt(i) = nullptr;
|
|
continue;
|
|
}
|
|
validupdates++;
|
|
}
|
|
|
|
if (!validupdates) {
|
|
// This can happen if the update was only valid for one table.
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
nsCString
|
|
Classifier::GetProvider(const nsACString& aTableName)
|
|
{
|
|
nsCOMPtr<nsIUrlClassifierUtils> urlUtil =
|
|
do_GetService(NS_URLCLASSIFIERUTILS_CONTRACTID);
|
|
|
|
nsCString provider;
|
|
nsresult rv = urlUtil->GetProvider(aTableName, provider);
|
|
|
|
return NS_SUCCEEDED(rv) ? provider : EmptyCString();
|
|
}
|
|
|
|
/*
|
|
* This will consume+delete updates from the passed nsTArray.
|
|
*/
|
|
nsresult
|
|
Classifier::UpdateHashStore(nsTArray<TableUpdate*>* aUpdates,
|
|
const nsACString& aTable)
|
|
{
|
|
if (nsUrlClassifierDBService::ShutdownHasStarted()) {
|
|
return NS_ERROR_UC_UPDATE_SHUTDOWNING;
|
|
}
|
|
|
|
LOG(("Classifier::UpdateHashStore(%s)", PromiseFlatCString(aTable).get()));
|
|
|
|
HashStore store(aTable, GetProvider(aTable), mUpdatingDirectory);
|
|
|
|
if (!CheckValidUpdate(aUpdates, store.TableName())) {
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult rv = store.Open();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
rv = store.BeginUpdate();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// Read the part of the store that is (only) in the cache
|
|
LookupCacheV2* lookupCache =
|
|
LookupCache::Cast<LookupCacheV2>(GetLookupCacheForUpdate(store.TableName()));
|
|
if (!lookupCache) {
|
|
return NS_ERROR_UC_UPDATE_TABLE_NOT_FOUND;
|
|
}
|
|
|
|
FallibleTArray<uint32_t> AddPrefixHashes;
|
|
rv = lookupCache->GetPrefixes(AddPrefixHashes);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
rv = store.AugmentAdds(AddPrefixHashes);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
AddPrefixHashes.Clear();
|
|
|
|
uint32_t applied = 0;
|
|
|
|
for (uint32_t i = 0; i < aUpdates->Length(); i++) {
|
|
TableUpdate *update = aUpdates->ElementAt(i);
|
|
if (!update || !update->TableName().Equals(store.TableName()))
|
|
continue;
|
|
|
|
rv = store.ApplyUpdate(*update);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
applied++;
|
|
|
|
auto updateV2 = TableUpdate::Cast<TableUpdateV2>(update);
|
|
if (updateV2) {
|
|
LOG(("Applied update to table %s:", store.TableName().get()));
|
|
LOG((" %d add chunks", updateV2->AddChunks().Length()));
|
|
LOG((" %zu add prefixes", updateV2->AddPrefixes().Length()));
|
|
LOG((" %zu add completions", updateV2->AddCompletes().Length()));
|
|
LOG((" %d sub chunks", updateV2->SubChunks().Length()));
|
|
LOG((" %zu sub prefixes", updateV2->SubPrefixes().Length()));
|
|
LOG((" %zu sub completions", updateV2->SubCompletes().Length()));
|
|
LOG((" %d add expirations", updateV2->AddExpirations().Length()));
|
|
LOG((" %d sub expirations", updateV2->SubExpirations().Length()));
|
|
}
|
|
|
|
aUpdates->ElementAt(i) = nullptr;
|
|
}
|
|
|
|
LOG(("Applied %d update(s) to %s.", applied, store.TableName().get()));
|
|
|
|
rv = store.Rebuild();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
LOG(("Table %s now has:", store.TableName().get()));
|
|
LOG((" %d add chunks", store.AddChunks().Length()));
|
|
LOG((" %zu add prefixes", store.AddPrefixes().Length()));
|
|
LOG((" %zu add completions", store.AddCompletes().Length()));
|
|
LOG((" %d sub chunks", store.SubChunks().Length()));
|
|
LOG((" %zu sub prefixes", store.SubPrefixes().Length()));
|
|
LOG((" %zu sub completions", store.SubCompletes().Length()));
|
|
|
|
rv = store.WriteFile();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// At this point the store is updated and written out to disk, but
|
|
// the data is still in memory. Build our quick-lookup table here.
|
|
rv = lookupCache->Build(store.AddPrefixes(), store.AddCompletes());
|
|
NS_ENSURE_SUCCESS(rv, NS_ERROR_UC_UPDATE_BUILD_PREFIX_FAILURE);
|
|
|
|
#if defined(DEBUG)
|
|
lookupCache->DumpCompletions();
|
|
#endif
|
|
rv = lookupCache->WriteFile();
|
|
NS_ENSURE_SUCCESS(rv, NS_ERROR_UC_UPDATE_FAIL_TO_WRITE_DISK);
|
|
|
|
LOG(("Successfully updated %s", store.TableName().get()));
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
Classifier::UpdateTableV4(nsTArray<TableUpdate*>* aUpdates,
|
|
const nsACString& aTable)
|
|
{
|
|
MOZ_ASSERT(!NS_IsMainThread(),
|
|
"UpdateTableV4 must be called on the classifier worker thread.");
|
|
if (nsUrlClassifierDBService::ShutdownHasStarted()) {
|
|
return NS_ERROR_UC_UPDATE_SHUTDOWNING;
|
|
}
|
|
|
|
LOG(("Classifier::UpdateTableV4(%s)", PromiseFlatCString(aTable).get()));
|
|
|
|
if (!CheckValidUpdate(aUpdates, aTable)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
LookupCacheV4* lookupCache =
|
|
LookupCache::Cast<LookupCacheV4>(GetLookupCacheForUpdate(aTable));
|
|
if (!lookupCache) {
|
|
return NS_ERROR_UC_UPDATE_TABLE_NOT_FOUND;
|
|
}
|
|
|
|
nsresult rv = NS_OK;
|
|
|
|
// If there are multiple updates for the same table, prefixes1 & prefixes2
|
|
// will act as input and output in turn to reduce memory copy overhead.
|
|
PrefixStringMap prefixes1, prefixes2;
|
|
PrefixStringMap* input = &prefixes1;
|
|
PrefixStringMap* output = &prefixes2;
|
|
|
|
TableUpdateV4* lastAppliedUpdate = nullptr;
|
|
for (uint32_t i = 0; i < aUpdates->Length(); i++) {
|
|
TableUpdate *update = aUpdates->ElementAt(i);
|
|
if (!update || !update->TableName().Equals(aTable)) {
|
|
continue;
|
|
}
|
|
|
|
auto updateV4 = TableUpdate::Cast<TableUpdateV4>(update);
|
|
NS_ENSURE_TRUE(updateV4, NS_ERROR_UC_UPDATE_TABLE_NOT_FOUND);
|
|
|
|
if (updateV4->IsFullUpdate()) {
|
|
input->Clear();
|
|
output->Clear();
|
|
rv = lookupCache->ApplyUpdate(updateV4, *input, *output);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
} else {
|
|
// If both prefix sets are empty, this means we are doing a partial update
|
|
// without a prior full/partial update in the loop. In this case we should
|
|
// get prefixes from the lookup cache first.
|
|
if (prefixes1.IsEmpty() && prefixes2.IsEmpty()) {
|
|
lookupCache->GetPrefixes(prefixes1);
|
|
} else {
|
|
MOZ_ASSERT(prefixes1.IsEmpty() ^ prefixes2.IsEmpty());
|
|
|
|
// When there are multiple partial updates, input should always point
|
|
// to the non-empty prefix set(filled by previous full/partial update).
|
|
// output should always point to the empty prefix set.
|
|
input = prefixes1.IsEmpty() ? &prefixes2 : &prefixes1;
|
|
output = prefixes1.IsEmpty() ? &prefixes1 : &prefixes2;
|
|
}
|
|
|
|
rv = lookupCache->ApplyUpdate(updateV4, *input, *output);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
input->Clear();
|
|
}
|
|
|
|
// Keep track of the last applied update.
|
|
lastAppliedUpdate = updateV4;
|
|
|
|
aUpdates->ElementAt(i) = nullptr;
|
|
}
|
|
|
|
rv = lookupCache->Build(*output);
|
|
NS_ENSURE_SUCCESS(rv, NS_ERROR_UC_UPDATE_BUILD_PREFIX_FAILURE);
|
|
|
|
rv = lookupCache->WriteFile();
|
|
NS_ENSURE_SUCCESS(rv, NS_ERROR_UC_UPDATE_FAIL_TO_WRITE_DISK);
|
|
|
|
if (lastAppliedUpdate) {
|
|
LOG(("Write meta data of the last applied update."));
|
|
rv = lookupCache->WriteMetadata(lastAppliedUpdate);
|
|
NS_ENSURE_SUCCESS(rv, NS_ERROR_UC_UPDATE_FAIL_TO_WRITE_DISK);
|
|
}
|
|
|
|
LOG(("Successfully updated %s\n", PromiseFlatCString(aTable).get()));
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
Classifier::UpdateCache(TableUpdate* aUpdate)
|
|
{
|
|
if (!aUpdate) {
|
|
return NS_OK;
|
|
}
|
|
|
|
nsAutoCString table(aUpdate->TableName());
|
|
LOG(("Classifier::UpdateCache(%s)", table.get()));
|
|
|
|
LookupCache *lookupCache = GetLookupCache(table);
|
|
if (!lookupCache) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
auto lookupV2 = LookupCache::Cast<LookupCacheV2>(lookupCache);
|
|
if (lookupV2) {
|
|
auto updateV2 = TableUpdate::Cast<TableUpdateV2>(aUpdate);
|
|
lookupV2->AddGethashResultToCache(updateV2->AddCompletes(),
|
|
updateV2->MissPrefixes());
|
|
} else {
|
|
auto lookupV4 = LookupCache::Cast<LookupCacheV4>(lookupCache);
|
|
if (!lookupV4) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
auto updateV4 = TableUpdate::Cast<TableUpdateV4>(aUpdate);
|
|
lookupV4->AddFullHashResponseToCache(updateV4->FullHashResponse());
|
|
}
|
|
|
|
#if defined(DEBUG)
|
|
lookupCache->DumpCache();
|
|
#endif
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
LookupCache *
|
|
Classifier::GetLookupCache(const nsACString& aTable, bool aForUpdate)
|
|
{
|
|
if (aForUpdate) {
|
|
MOZ_ASSERT(NS_GetCurrentThread() == mUpdateThread,
|
|
"GetLookupCache(aForUpdate==true) can only be called on update thread.");
|
|
}
|
|
|
|
nsTArray<LookupCache*>& lookupCaches = aForUpdate ? mNewLookupCaches
|
|
: mLookupCaches;
|
|
auto& rootStoreDirectory = aForUpdate ? mUpdatingDirectory
|
|
: mRootStoreDirectory;
|
|
|
|
for (auto c: lookupCaches) {
|
|
if (c->TableName().Equals(aTable)) {
|
|
return c;
|
|
}
|
|
}
|
|
|
|
// TODO : Bug 1302600, It would be better if we have a more general non-main
|
|
// thread method to convert table name to protocol version. Currently
|
|
// we can only know this by checking if the table name ends with '-proto'.
|
|
UniquePtr<LookupCache> cache;
|
|
nsCString provider = GetProvider(aTable);
|
|
if (StringEndsWith(aTable, NS_LITERAL_CSTRING("-proto"))) {
|
|
cache = MakeUnique<LookupCacheV4>(aTable, provider, rootStoreDirectory);
|
|
} else {
|
|
cache = MakeUnique<LookupCacheV2>(aTable, provider, rootStoreDirectory);
|
|
}
|
|
|
|
nsresult rv = cache->Init();
|
|
if (NS_FAILED(rv)) {
|
|
return nullptr;
|
|
}
|
|
rv = cache->Open();
|
|
if (NS_SUCCEEDED(rv)) {
|
|
lookupCaches.AppendElement(cache.get());
|
|
return cache.release();
|
|
}
|
|
|
|
// At this point we failed to open LookupCache.
|
|
//
|
|
// GetLookupCache for update and for other usage will run on update thread
|
|
// and worker thread respectively (Bug 1339760). Removing stuff only in
|
|
// their own realms potentially increases the concurrency.
|
|
|
|
if (aForUpdate) {
|
|
// Remove intermediaries no matter if it's due to file corruption or not.
|
|
RemoveUpdateIntermediaries();
|
|
return nullptr;
|
|
}
|
|
|
|
// Non-update case.
|
|
if (rv == NS_ERROR_FILE_CORRUPTED) {
|
|
Reset(); // Not including the update intermediaries.
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
nsresult
|
|
Classifier::ReadNoiseEntries(const Prefix& aPrefix,
|
|
const nsACString& aTableName,
|
|
uint32_t aCount,
|
|
PrefixArray* aNoiseEntries)
|
|
{
|
|
FallibleTArray<uint32_t> prefixes;
|
|
nsresult rv;
|
|
|
|
LookupCache *cache = GetLookupCache(aTableName);
|
|
if (!cache) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
LookupCacheV2* cacheV2 = LookupCache::Cast<LookupCacheV2>(cache);
|
|
if (cacheV2) {
|
|
rv = cacheV2->GetPrefixes(prefixes);
|
|
} else {
|
|
rv = LookupCache::Cast<LookupCacheV4>(cache)->GetFixedLengthPrefixes(prefixes);
|
|
}
|
|
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
if (prefixes.Length() == 0) {
|
|
NS_WARNING("Could not find prefix in PrefixSet during noise lookup");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// We do not want to simply pick random prefixes, because this would allow
|
|
// averaging out the noise by analysing the traffic from Firefox users.
|
|
// Instead, we ensure the 'noise' is the same for the same prefix by seeding
|
|
// the random number generator with the prefix. We prefer not to use rand()
|
|
// which isn't thread safe, and the reseeding of which could trip up other
|
|
// parts othe code that expect actual random numbers.
|
|
// Here we use a simple LCG (Linear Congruential Generator) to generate
|
|
// random numbers. We seed the LCG with the prefix we are generating noise
|
|
// for.
|
|
// http://en.wikipedia.org/wiki/Linear_congruential_generator
|
|
|
|
uint32_t m = prefixes.Length();
|
|
uint32_t a = aCount % m;
|
|
uint32_t idx = aPrefix.ToUint32() % m;
|
|
|
|
for (size_t i = 0; i < aCount; i++) {
|
|
idx = (a * idx + a) % m;
|
|
|
|
Prefix newPrefix;
|
|
uint32_t hash = prefixes[idx];
|
|
// In the case V4 little endian, we did swapping endian when converting from char* to
|
|
// int, should revert endian to make sure we will send hex string correctly
|
|
// See https://bugzilla.mozilla.org/show_bug.cgi?id=1283007#c23
|
|
if (!cacheV2 && !bool(MOZ_BIG_ENDIAN)) {
|
|
hash = NativeEndian::swapFromBigEndian(prefixes[idx]);
|
|
}
|
|
|
|
newPrefix.FromUint32(hash);
|
|
if (newPrefix != aPrefix) {
|
|
aNoiseEntries->AppendElement(newPrefix);
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
Classifier::LoadMetadata(nsIFile* aDirectory, nsACString& aResult)
|
|
{
|
|
nsCOMPtr<nsISimpleEnumerator> entries;
|
|
nsresult rv = aDirectory->GetDirectoryEntries(getter_AddRefs(entries));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
NS_ENSURE_ARG_POINTER(entries);
|
|
|
|
bool hasMore;
|
|
while (NS_SUCCEEDED(rv = entries->HasMoreElements(&hasMore)) && hasMore) {
|
|
nsCOMPtr<nsISupports> supports;
|
|
rv = entries->GetNext(getter_AddRefs(supports));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsCOMPtr<nsIFile> file = do_QueryInterface(supports);
|
|
|
|
// If |file| is a directory, recurse to find its entries as well.
|
|
bool isDirectory;
|
|
if (NS_FAILED(file->IsDirectory(&isDirectory))) {
|
|
continue;
|
|
}
|
|
if (isDirectory) {
|
|
LoadMetadata(file, aResult);
|
|
continue;
|
|
}
|
|
|
|
// Truncate file extension to get the table name.
|
|
nsCString tableName;
|
|
rv = file->GetNativeLeafName(tableName);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
int32_t dot = tableName.RFind(METADATA_SUFFIX);
|
|
if (dot == -1) {
|
|
continue;
|
|
}
|
|
tableName.Cut(dot, METADATA_SUFFIX.Length());
|
|
|
|
LookupCacheV4* lookupCache =
|
|
LookupCache::Cast<LookupCacheV4>(GetLookupCache(tableName));
|
|
if (!lookupCache) {
|
|
continue;
|
|
}
|
|
|
|
nsCString state;
|
|
nsCString checksum;
|
|
rv = lookupCache->LoadMetadata(state, checksum);
|
|
if (NS_FAILED(rv)) {
|
|
LOG(("Failed to get metadata for table %s", tableName.get()));
|
|
continue;
|
|
}
|
|
|
|
// The state might include '\n' so that we have to encode.
|
|
nsAutoCString stateBase64;
|
|
rv = Base64Encode(state, stateBase64);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsAutoCString checksumBase64;
|
|
rv = Base64Encode(checksum, checksumBase64);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
LOG(("Appending state '%s' and checksum '%s' for table %s",
|
|
stateBase64.get(), checksumBase64.get(), tableName.get()));
|
|
|
|
aResult.AppendPrintf("%s;%s:%s\n", tableName.get(),
|
|
stateBase64.get(),
|
|
checksumBase64.get());
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
} // namespace safebrowsing
|
|
} // namespace mozilla
|