1731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick// Copyright (c) 2010 The Chromium Authors. All rights reserved. 2c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// Use of this source code is governed by a BSD-style license that can be 3c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// found in the LICENSE file. 4c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 5c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "net/disk_cache/backend_impl.h" 6c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 7c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "base/file_path.h" 8c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "base/file_util.h" 9c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "base/message_loop.h" 10731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick#include "base/metrics/field_trial.h" 11731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick#include "base/metrics/histogram.h" 12dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen#include "base/metrics/stats_counters.h" 13c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "base/rand_util.h" 14c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "base/string_util.h" 153345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick#include "base/stringprintf.h" 16c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "base/sys_info.h" 173f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen#include "base/threading/worker_pool.h" 183f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen#include "base/threading/thread_restrictions.h" 193345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick#include "base/time.h" 20c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "base/timer.h" 21c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "net/base/net_errors.h" 22c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "net/disk_cache/cache_util.h" 23c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "net/disk_cache/entry_impl.h" 24c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "net/disk_cache/errors.h" 253345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick#include "net/disk_cache/experiments.h" 26c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "net/disk_cache/file.h" 273345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick#include "net/disk_cache/hash.h" 28c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "net/disk_cache/mem_backend_impl.h" 29c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 30c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// This has to be defined before including histogram_macros.h from this file. 31c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#define NET_DISK_CACHE_BACKEND_IMPL_CC_ 32c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#include "net/disk_cache/histogram_macros.h" 33c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 34c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottusing base::Time; 35c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottusing base::TimeDelta; 36c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochusing base::TimeTicks; 37c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 38c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottnamespace { 39c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 40c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottconst char* kIndexName = "index"; 41c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottconst int kMaxOldFolders = 100; 42c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 43c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// Seems like ~240 MB correspond to less than 50k entries for 99% of the people. 443345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick// Note that the actual target is to keep the index table load factor under 55% 453345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick// for most users. 46c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottconst int k64kEntriesStore = 240 * 1000 * 1000; 47c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottconst int kBaseTableLen = 64 * 1024; 48c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottconst int kDefaultCacheSize = 80 * 1024 * 1024; 49c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 50c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottint DesiredIndexTableLen(int32 storage_size) { 51c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (storage_size <= k64kEntriesStore) 52c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return kBaseTableLen; 53c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (storage_size <= k64kEntriesStore * 2) 54c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return kBaseTableLen * 2; 55c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (storage_size <= k64kEntriesStore * 4) 56c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return kBaseTableLen * 4; 57c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (storage_size <= k64kEntriesStore * 8) 58c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return kBaseTableLen * 8; 59c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 60c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // The biggest storage_size for int32 requires a 4 MB table. 61c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return kBaseTableLen * 16; 62c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 63c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 64c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottint MaxStorageSizeForTable(int table_len) { 65c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return table_len * (k64kEntriesStore / kBaseTableLen); 66c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 67c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 68c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottsize_t GetIndexSize(int table_len) { 69c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott size_t table_size = sizeof(disk_cache::CacheAddr) * table_len; 70c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return sizeof(disk_cache::IndexHeader) + table_size; 71c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 72c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 73c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// ------------------------------------------------------------------------ 74c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 75c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// Returns a fully qualified name from path and name, using a given name prefix 76c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// and index number. For instance, if the arguments are "/foo", "bar" and 5, it 77c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// will return "/foo/old_bar_005". 78c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick ScottFilePath GetPrefixedName(const FilePath& path, const std::string& name, 79c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int index) { 803345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick std::string tmp = base::StringPrintf("%s%s_%03d", "old_", 813345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick name.c_str(), index); 82c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return path.AppendASCII(tmp); 83c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 84c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 85c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// This is a simple Task to cleanup old caches. 86c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottclass CleanupTask : public Task { 87c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott public: 88c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CleanupTask(const FilePath& path, const std::string& name) 89c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott : path_(path), name_(name) {} 90c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 91c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott virtual void Run(); 92c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 93c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott private: 94c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott FilePath path_; 95c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott std::string name_; 96c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch DISALLOW_COPY_AND_ASSIGN(CleanupTask); 97c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott}; 98c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 99c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid CleanupTask::Run() { 100c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott for (int i = 0; i < kMaxOldFolders; i++) { 101c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott FilePath to_delete = GetPrefixedName(path_, name_, i); 102c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott disk_cache::DeleteCache(to_delete, true); 103c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 104c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 105c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 106c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// Returns a full path to rename the current cache, in order to delete it. path 107c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// is the current folder location, and name is the current folder name. 108c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick ScottFilePath GetTempCacheName(const FilePath& path, const std::string& name) { 109c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // We'll attempt to have up to kMaxOldFolders folders for deletion. 110c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott for (int i = 0; i < kMaxOldFolders; i++) { 111c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott FilePath to_delete = GetPrefixedName(path, name, i); 112c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!file_util::PathExists(to_delete)) 113c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return to_delete; 114c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 115c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return FilePath(); 116c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 117c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 118c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// Moves the cache files to a new folder and creates a task to delete them. 119c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottbool DelayedCacheCleanup(const FilePath& full_path) { 120513209b27ff55e2841eac0e4120199c23acce758Ben Murdoch // GetTempCacheName() and MoveCache() use synchronous file 121513209b27ff55e2841eac0e4120199c23acce758Ben Murdoch // operations. 122513209b27ff55e2841eac0e4120199c23acce758Ben Murdoch base::ThreadRestrictions::ScopedAllowIO allow_io; 123513209b27ff55e2841eac0e4120199c23acce758Ben Murdoch 124c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott FilePath current_path = full_path.StripTrailingSeparators(); 125c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 126c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott FilePath path = current_path.DirName(); 127c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott FilePath name = current_path.BaseName(); 128c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#if defined(OS_POSIX) 129c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott std::string name_str = name.value(); 130c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#elif defined(OS_WIN) 131c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // We created this file so it should only contain ASCII. 132c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott std::string name_str = WideToASCII(name.value()); 133c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott#endif 134c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 135c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott FilePath to_delete = GetTempCacheName(path, name_str); 136c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (to_delete.empty()) { 137c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(ERROR) << "Unable to get another cache folder"; 138c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 139c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 140c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 141c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!disk_cache::MoveCache(full_path, to_delete)) { 142731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick LOG(ERROR) << "Unable to move cache folder"; 143c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 144c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 145c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1463f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen base::WorkerPool::PostTask(FROM_HERE, new CleanupTask(path, name_str), true); 147c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return true; 148c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 149c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1503345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick// Sets group for the current experiment. Returns false if the files should be 1513345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick// discarded. 152731df977c0511bca2206b5f333555b1205ff1f43Iain Merrickbool InitExperiment(disk_cache::IndexHeader* header) { 1533345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if (header->experiment == disk_cache::EXPERIMENT_OLD_FILE1 || 1543345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick header->experiment == disk_cache::EXPERIMENT_OLD_FILE2) { 1553345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // Discard current cache. 156c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 157c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 158c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1593345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // See if we already defined the group for this profile. 1603345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if (header->experiment >= disk_cache::EXPERIMENT_DELETED_LIST_OUT) 1613345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return true; 1623345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 163731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick // The experiment is closed. 164731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick header->experiment = disk_cache::EXPERIMENT_DELETED_LIST_OUT; 165c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return true; 166c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 167c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 168c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// Initializes the field trial structures to allow performance measurements 169dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen// for the current cache configuration. 170dc0f95d653279beabeb9817299e2902918ba123eKristian Monsenvoid SetFieldTrialInfo(int size_group) { 171c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott static bool first = true; 172c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!first) 173dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen return; 174c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 175c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Field trials involve static objects so we have to do this only once. 176c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott first = false; 1773345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick std::string group1 = base::StringPrintf("CacheSizeGroup_%d", size_group); 17872a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen int totalProbability = 10; 17972a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen scoped_refptr<base::FieldTrial> trial1( 18072a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen new base::FieldTrial("CacheSize", totalProbability, group1, 2011, 6, 30)); 18172a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen trial1->AppendGroup(group1, totalProbability); 182c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 183c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 184c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch// ------------------------------------------------------------------------ 185c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 186c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch// This class takes care of building an instance of the backend. 187c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochclass CacheCreator { 188c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch public: 189c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch CacheCreator(const FilePath& path, bool force, int max_bytes, 190c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch net::CacheType type, uint32 flags, 1913f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen base::MessageLoopProxy* thread, net::NetLog* net_log, 1923f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen disk_cache::Backend** backend, 193c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch net::CompletionCallback* callback) 194c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch : path_(path), force_(force), retry_(false), max_bytes_(max_bytes), 195c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch type_(type), flags_(flags), thread_(thread), backend_(backend), 1963f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen callback_(callback), cache_(NULL), net_log_(net_log), 197c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch ALLOW_THIS_IN_INITIALIZER_LIST( 198c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch my_callback_(this, &CacheCreator::OnIOComplete)) { 199c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch } 200c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch ~CacheCreator() {} 201c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 202c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // Creates the backend. 203c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch int Run(); 204c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 205c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // Callback implementation. 206c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch void OnIOComplete(int result); 207c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 208c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch private: 209c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch void DoCallback(int result); 210c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 211c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch const FilePath& path_; 212c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch bool force_; 213c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch bool retry_; 214c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch int max_bytes_; 215c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch net::CacheType type_; 216c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch uint32 flags_; 217c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch scoped_refptr<base::MessageLoopProxy> thread_; 218c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch disk_cache::Backend** backend_; 219c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch net::CompletionCallback* callback_; 220c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch disk_cache::BackendImpl* cache_; 2213f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen net::NetLog* net_log_; 222c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch net::CompletionCallbackImpl<CacheCreator> my_callback_; 223c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 224c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch DISALLOW_COPY_AND_ASSIGN(CacheCreator); 225c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch}; 226c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 227c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochint CacheCreator::Run() { 2283f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen cache_ = new disk_cache::BackendImpl(path_, thread_, net_log_); 229c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch cache_->SetMaxSize(max_bytes_); 230c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch cache_->SetType(type_); 231c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch cache_->SetFlags(flags_); 232c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch int rv = cache_->Init(&my_callback_); 233c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch DCHECK_EQ(net::ERR_IO_PENDING, rv); 234c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return rv; 235c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch} 236c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 237c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochvoid CacheCreator::OnIOComplete(int result) { 238c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (result == net::OK || !force_ || retry_) 239c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return DoCallback(result); 240c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 241c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // This is a failure and we are supposed to try again, so delete the object, 242c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // delete all the files, and try again. 243c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch retry_ = true; 244c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch delete cache_; 245c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch cache_ = NULL; 246c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (!DelayedCacheCleanup(path_)) 247c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return DoCallback(result); 248c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 249c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // The worker thread will start deleting files soon, but the original folder 250c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // is not there anymore... let's create a new set of files. 251c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch int rv = Run(); 252c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch DCHECK_EQ(net::ERR_IO_PENDING, rv); 253c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch} 254c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 255c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochvoid CacheCreator::DoCallback(int result) { 256c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch DCHECK_NE(net::ERR_IO_PENDING, result); 257c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (result == net::OK) { 258c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch *backend_ = cache_; 259c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch } else { 260c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch LOG(ERROR) << "Unable to create cache"; 261c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch *backend_ = NULL; 262c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch delete cache_; 263c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch } 264c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch callback_->Run(result); 265c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch delete this; 266c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch} 267c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 268c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch// ------------------------------------------------------------------------ 269c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 270c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch// A task to perform final cleanup on the background thread. 271c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochclass FinalCleanup : public Task { 272c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch public: 273c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch explicit FinalCleanup(disk_cache::BackendImpl* backend) : backend_(backend) {} 274c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch ~FinalCleanup() {} 275c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 276c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch virtual void Run(); 277c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch private: 278c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch disk_cache::BackendImpl* backend_; 279c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch DISALLOW_EVIL_CONSTRUCTORS(FinalCleanup); 280c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch}; 281c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 282c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochvoid FinalCleanup::Run() { 2833345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick backend_->CleanupCache(); 284c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch} 285c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 286c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} // namespace 287c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 288c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// ------------------------------------------------------------------------ 289c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 290c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottnamespace disk_cache { 291c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 292c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochint CreateCacheBackend(net::CacheType type, const FilePath& path, int max_bytes, 293c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch bool force, base::MessageLoopProxy* thread, 2943f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen net::NetLog* net_log, Backend** backend, 2953f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen CompletionCallback* callback) { 296c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch DCHECK(callback); 297c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (type == net::MEMORY_CACHE) { 298ddb351dbec246cf1fab5ec20d2d5520909041de1Kristian Monsen *backend = MemBackendImpl::CreateBackend(max_bytes, net_log); 299c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return *backend ? net::OK : net::ERR_FAILED; 300c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch } 301c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch DCHECK(thread); 302c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 303c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return BackendImpl::CreateBackend(path, force, max_bytes, type, kNone, thread, 3043f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen net_log, backend, callback); 305c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 306c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 307c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch// Returns the preferred maximum number of bytes for the cache given the 308c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch// number of available bytes. 309c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottint PreferedCacheSize(int64 available) { 310c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // Return 80% of the available space if there is not enough space to use 311c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // kDefaultCacheSize. 312c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (available < kDefaultCacheSize * 10 / 8) 313c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return static_cast<int32>(available * 8 / 10); 314c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 315c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // Return kDefaultCacheSize if it uses 80% to 10% of the available space. 316c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (available < kDefaultCacheSize * 10) 317c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return kDefaultCacheSize; 318c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 319c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // Return 10% of the available space if the target size 320c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // (2.5 * kDefaultCacheSize) is more than 10%. 321c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (available < static_cast<int64>(kDefaultCacheSize) * 25) 322c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return static_cast<int32>(available / 10); 323c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 324c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // Return the target size (2.5 * kDefaultCacheSize) if it uses 10% to 1% 325c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // of the available space. 326c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (available < static_cast<int64>(kDefaultCacheSize) * 250) 327c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return kDefaultCacheSize * 5 / 2; 328c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 329c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // Return 1% of the available space if it does not exceed kint32max. 330c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (available < static_cast<int64>(kint32max) * 100) 331c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return static_cast<int32>(available / 100); 332c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 333c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return kint32max; 334c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 335c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 336c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// ------------------------------------------------------------------------ 337c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 3383345a6884c488ff3a535c2c9acdd33d74b37e311Iain MerrickBackendImpl::BackendImpl(const FilePath& path, 3393f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen base::MessageLoopProxy* cache_thread, 3403f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen net::NetLog* net_log) 3413345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick : ALLOW_THIS_IN_INITIALIZER_LIST(background_queue_(this, cache_thread)), 3423345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick path_(path), 3433345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick block_files_(path), 3443345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick mask_(0), 3453345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick max_size_(0), 3463345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick io_delay_(0), 3473345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick cache_type_(net::DISK_CACHE), 3483345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick uma_report_(0), 3493345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick user_flags_(0), 3503345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick init_(false), 3513345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick restarted_(false), 3523345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick unit_test_(false), 3533345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick read_only_(false), 354dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen disabled_(false), 3553345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick new_eviction_(false), 3563345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick first_timer_(true), 3573f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen net_log_(net_log), 3583345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick done_(true, false), 3593345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick ALLOW_THIS_IN_INITIALIZER_LIST(factory_(this)), 3603345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick ALLOW_THIS_IN_INITIALIZER_LIST(ptr_factory_(this)) { 3613345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 3623345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 3633345a6884c488ff3a535c2c9acdd33d74b37e311Iain MerrickBackendImpl::BackendImpl(const FilePath& path, 3643345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick uint32 mask, 3653f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen base::MessageLoopProxy* cache_thread, 3663f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen net::NetLog* net_log) 3673345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick : ALLOW_THIS_IN_INITIALIZER_LIST(background_queue_(this, cache_thread)), 3683345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick path_(path), 3693345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick block_files_(path), 3703345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick mask_(mask), 3713345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick max_size_(0), 3723345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick io_delay_(0), 3733345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick cache_type_(net::DISK_CACHE), 3743345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick uma_report_(0), 3753345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick user_flags_(kMask), 3763345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick init_(false), 3773345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick restarted_(false), 3783345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick unit_test_(false), 3793345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick read_only_(false), 380dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen disabled_(false), 3813345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick new_eviction_(false), 3823345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick first_timer_(true), 3833f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen net_log_(net_log), 3843345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick done_(true, false), 3853345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick ALLOW_THIS_IN_INITIALIZER_LIST(factory_(this)), 3863345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick ALLOW_THIS_IN_INITIALIZER_LIST(ptr_factory_(this)) { 3873345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 3883345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 389c407dc5cd9bdc5668497f21b26b09d988ab439deBen MurdochBackendImpl::~BackendImpl() { 390c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch background_queue_.WaitForPendingIO(); 391c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 392c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (background_queue_.BackgroundIsCurrentThread()) { 393c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // Unit tests may use the same thread for everything. 394c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch CleanupCache(); 395c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch } else { 396c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch background_queue_.background_thread()->PostTask(FROM_HERE, 397c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch new FinalCleanup(this)); 398c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch done_.Wait(); 399c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch } 400c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch} 401c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 40272a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen// If the initialization of the cache fails, and force is true, we will discard 40372a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen// the whole cache and create a new one. In order to process a potentially large 40472a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen// number of files, we'll rename the cache folder to old_ + original_name + 40572a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen// number, (located on the same parent folder), and spawn a worker thread to 40672a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen// delete all the files on all the stale cache folders. The whole process can 40772a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen// still fail if we are not able to rename the cache folder (for instance due to 40872a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen// a sharing violation), and in that case a cache for this profile (on the 40972a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen// desired path) cannot be created. 41072a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen// 41172a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen// Static. 41272a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsenint BackendImpl::CreateBackend(const FilePath& full_path, bool force, 41372a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen int max_bytes, net::CacheType type, 41472a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen uint32 flags, base::MessageLoopProxy* thread, 41572a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen net::NetLog* net_log, Backend** backend, 41672a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen CompletionCallback* callback) { 41772a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen DCHECK(callback); 41872a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen CacheCreator* creator = new CacheCreator(full_path, force, max_bytes, type, 41972a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen flags, thread, net_log, backend, 42072a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen callback); 42172a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen // This object will self-destroy when finished. 42272a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen return creator->Run(); 42372a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen} 42472a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen 42572a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsenint BackendImpl::Init(CompletionCallback* callback) { 42672a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen background_queue_.Init(callback); 42772a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen return net::ERR_IO_PENDING; 42872a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen} 429c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 430c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochint BackendImpl::SyncInit() { 431c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott DCHECK(!init_); 432c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (init_) 433c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return net::ERR_FAILED; 434c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 435c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott bool create_files = false; 436c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!InitBackingStore(&create_files)) { 437c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott ReportError(ERR_STORAGE_ERROR); 438c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return net::ERR_FAILED; 439c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 440c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 441c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott num_refs_ = num_pending_io_ = max_refs_ = 0; 442c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch entry_count_ = byte_count_ = 0; 443c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 444c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!restarted_) { 4453345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick buffer_bytes_ = 0; 446c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott trace_object_ = TraceObject::GetTraceObject(); 447c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Create a recurrent timer of 30 secs. 448c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int timer_delay = unit_test_ ? 1000 : 30000; 449c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott timer_.Start(TimeDelta::FromMilliseconds(timer_delay), this, 450c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott &BackendImpl::OnStatsTimer); 451c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 452c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 453c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott init_ = true; 454c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 4553345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if (data_->header.experiment != NO_EXPERIMENT && 4563345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick cache_type_ != net::DISK_CACHE) { 457c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // No experiment for other caches. 458c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return net::ERR_FAILED; 459c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 460c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 461c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!(user_flags_ & disk_cache::kNoRandom)) { 462c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // The unit test controls directly what to test. 463c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott new_eviction_ = (cache_type_ == net::DISK_CACHE); 464c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 465c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 466c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!CheckIndex()) { 467c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott ReportError(ERR_INIT_FAILED); 468c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return net::ERR_FAILED; 469c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 470c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 4713345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if (!(user_flags_ & disk_cache::kNoRandom) && 4723345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick cache_type_ == net::DISK_CACHE && 473731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick !InitExperiment(&data_->header)) 4743345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return net::ERR_FAILED; 4753345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 476c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // We don't care if the value overflows. The only thing we care about is that 477c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // the id cannot be zero, because that value is used as "not dirty". 478c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // Increasing the value once per second gives us many years before we start 479c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // having collisions. 480c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->header.this_id++; 481c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!data_->header.this_id) 482c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->header.this_id++; 483c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 484c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (data_->header.crash) { 485c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott ReportError(ERR_PREVIOUS_CRASH); 486c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } else { 487c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott ReportError(0); 488c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->header.crash = 1; 489c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 490c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 491c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!block_files_.Init(create_files)) 492c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return net::ERR_FAILED; 493c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 4943345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // We want to minimize the changes to cache for an AppCache. 4953345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if (cache_type() == net::APP_CACHE) { 4963345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick DCHECK(!new_eviction_); 4973345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick read_only_ = true; 4983345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick } 4993345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 500dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen // Setup load-time data only for the main cache. 501dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen if (cache_type() == net::DISK_CACHE) 502dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen SetFieldTrialInfo(GetSizeGroup()); 503dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen 504dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen eviction_.Init(this); 505dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen 506c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // stats_ and rankings_ may end up calling back to us so we better be enabled. 507c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott disabled_ = false; 508c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!stats_.Init(this, &data_->header.stats)) 509c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return net::ERR_FAILED; 510c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 511c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott disabled_ = !rankings_.Init(this, new_eviction_); 512c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 513c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return disabled_ ? net::ERR_FAILED : net::OK; 514c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 515c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 516c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochvoid BackendImpl::CleanupCache() { 517c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch Trace("Backend Cleanup"); 5183345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick eviction_.Stop(); 5193345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick timer_.Stop(); 5203345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 521c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (init_) { 5223345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick stats_.Store(); 523c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (data_) 524c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch data_->header.crash = 0; 525c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 526c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch File::WaitForPendingIO(&num_pending_io_); 5273345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if (user_flags_ & kNoRandom) { 5283345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // This is a net_unittest, verify that we are not 'leaking' entries. 5293345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick DCHECK(!num_refs_); 5303345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick } 531c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch } 5323345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick block_files_.CloseFiles(); 533c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch factory_.RevokeAll(); 5343345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick ptr_factory_.InvalidateWeakPtrs(); 535c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch done_.Signal(); 536c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 537c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 538c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// ------------------------------------------------------------------------ 539c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 540c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochint BackendImpl::OpenPrevEntry(void** iter, Entry** prev_entry, 541c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch CompletionCallback* callback) { 542c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch DCHECK(callback); 543c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch background_queue_.OpenPrevEntry(iter, prev_entry, callback); 544c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return net::ERR_IO_PENDING; 545c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch} 546c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 547c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochint BackendImpl::SyncOpenEntry(const std::string& key, Entry** entry) { 548c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch DCHECK(entry); 549c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch *entry = OpenEntryImpl(key); 550c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return (*entry) ? net::OK : net::ERR_FAILED; 551c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch} 552c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 553c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochint BackendImpl::SyncCreateEntry(const std::string& key, Entry** entry) { 554c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch DCHECK(entry); 555c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch *entry = CreateEntryImpl(key); 556c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return (*entry) ? net::OK : net::ERR_FAILED; 557c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch} 558c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 559c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochint BackendImpl::SyncDoomEntry(const std::string& key) { 560c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (disabled_) 561c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return net::ERR_FAILED; 562c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 563c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch EntryImpl* entry = OpenEntryImpl(key); 564c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (!entry) 565c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return net::ERR_FAILED; 566c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 567c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch entry->DoomImpl(); 568c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch entry->Release(); 569c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return net::OK; 570c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch} 571c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 572c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochint BackendImpl::SyncDoomAllEntries() { 5733345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // This is not really an error, but it is an interesting condition. 5743345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick ReportError(ERR_CACHE_DOOMED); 5753f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen stats_.OnEvent(Stats::DOOM_CACHE); 576c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (!num_refs_) { 5773f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen RestartCache(false); 5783f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen return disabled_ ? net::ERR_FAILED : net::OK; 579c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch } else { 580c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (disabled_) 581c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return net::ERR_FAILED; 582c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 583c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch eviction_.TrimCache(true); 584c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return net::OK; 585c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 586c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch} 587c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 588c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochint BackendImpl::SyncDoomEntriesBetween(const base::Time initial_time, 589c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch const base::Time end_time) { 5903345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick DCHECK_NE(net::APP_CACHE, cache_type_); 591c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (end_time.is_null()) 592c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return SyncDoomEntriesSince(initial_time); 593c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 594c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch DCHECK(end_time >= initial_time); 595c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 596c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (disabled_) 597c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return net::ERR_FAILED; 598c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 599c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch EntryImpl* node; 600c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch void* iter = NULL; 601c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch EntryImpl* next = OpenNextEntryImpl(&iter); 602c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (!next) 603c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return net::OK; 604c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 605c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch while (next) { 606c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch node = next; 607c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch next = OpenNextEntryImpl(&iter); 608c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 609c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (node->GetLastUsed() >= initial_time && 610c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch node->GetLastUsed() < end_time) { 611c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch node->DoomImpl(); 612c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch } else if (node->GetLastUsed() < initial_time) { 613c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (next) 614c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch next->Release(); 615c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch next = NULL; 616c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch SyncEndEnumeration(iter); 617c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch } 618c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 619c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch node->Release(); 620c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch } 621c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 622c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return net::OK; 623c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 624c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 625c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch// We use OpenNextEntryImpl to retrieve elements from the cache, until we get 626c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch// entries that are too old. 627c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochint BackendImpl::SyncDoomEntriesSince(const base::Time initial_time) { 6283345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick DCHECK_NE(net::APP_CACHE, cache_type_); 629c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (disabled_) 630c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return net::ERR_FAILED; 631c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 6323f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen stats_.OnEvent(Stats::DOOM_RECENT); 633c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch for (;;) { 634c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch void* iter = NULL; 635c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch EntryImpl* entry = OpenNextEntryImpl(&iter); 636c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (!entry) 637c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return net::OK; 638c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 639c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (initial_time > entry->GetLastUsed()) { 640c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch entry->Release(); 641c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch SyncEndEnumeration(iter); 642c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return net::OK; 643c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch } 644c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 645c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch entry->DoomImpl(); 646c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch entry->Release(); 647c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch SyncEndEnumeration(iter); // Dooming the entry invalidates the iterator. 648c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch } 649c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch} 650c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 651c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochint BackendImpl::SyncOpenNextEntry(void** iter, Entry** next_entry) { 652c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch *next_entry = OpenNextEntryImpl(iter); 653c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return (*next_entry) ? net::OK : net::ERR_FAILED; 654c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch} 655c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 656c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochint BackendImpl::SyncOpenPrevEntry(void** iter, Entry** prev_entry) { 657c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch *prev_entry = OpenPrevEntryImpl(iter); 658c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return (*prev_entry) ? net::OK : net::ERR_FAILED; 659c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch} 660c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 661c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochvoid BackendImpl::SyncEndEnumeration(void* iter) { 662c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch scoped_ptr<Rankings::Iterator> iterator( 663c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch reinterpret_cast<Rankings::Iterator*>(iter)); 664c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch} 665c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 666c407dc5cd9bdc5668497f21b26b09d988ab439deBen MurdochEntryImpl* BackendImpl::OpenEntryImpl(const std::string& key) { 667c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (disabled_) 668c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return NULL; 669c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 670c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch TimeTicks start = TimeTicks::Now(); 671c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott uint32 hash = Hash(key); 6723345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick Trace("Open hash 0x%x", hash); 673c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 67472a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen bool error; 67572a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen EntryImpl* cache_entry = MatchEntry(key, hash, false, Addr(), &error); 676c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!cache_entry) { 677c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.OnEvent(Stats::OPEN_MISS); 678c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return NULL; 679c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 680c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 681c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (ENTRY_NORMAL != cache_entry->entry()->Data()->state) { 682c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // The entry was already evicted. 683c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cache_entry->Release(); 684c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.OnEvent(Stats::OPEN_MISS); 685c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return NULL; 686c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 687c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 688c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott eviction_.OnOpenEntry(cache_entry); 689c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch entry_count_++; 690c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 691c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(AGE_MS, "OpenTime", GetSizeGroup(), start); 692c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.OnEvent(Stats::OPEN_HIT); 693dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen SIMPLE_STATS_COUNTER("disk_cache.hit"); 694c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return cache_entry; 695c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 696c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 697c407dc5cd9bdc5668497f21b26b09d988ab439deBen MurdochEntryImpl* BackendImpl::CreateEntryImpl(const std::string& key) { 698c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (disabled_ || key.empty()) 699c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return NULL; 700c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 701c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch TimeTicks start = TimeTicks::Now(); 702c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott uint32 hash = Hash(key); 7033345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick Trace("Create hash 0x%x", hash); 704c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 705c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott scoped_refptr<EntryImpl> parent; 706c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott Addr entry_address(data_->table[hash & mask_]); 707c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (entry_address.is_initialized()) { 708c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // We have an entry already. It could be the one we are looking for, or just 709c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // a hash conflict. 71072a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen bool error; 71172a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen EntryImpl* old_entry = MatchEntry(key, hash, false, Addr(), &error); 712c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (old_entry) 713c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return ResurrectEntry(old_entry); 714c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 71572a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen EntryImpl* parent_entry = MatchEntry(key, hash, true, Addr(), &error); 71672a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen DCHECK(!error); 7173345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if (parent_entry) { 7183345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick parent.swap(&parent_entry); 7193345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick } else if (data_->table[hash & mask_]) { 7203345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // We should have corrected the problem. 721c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott NOTREACHED(); 722c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return NULL; 723c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 724c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 725c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 726ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen // The general flow is to allocate disk space and initialize the entry data, 727ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen // followed by saving that to disk, then linking the entry though the index 728ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen // and finally through the lists. If there is a crash in this process, we may 729ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen // end up with: 730ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen // a. Used, unreferenced empty blocks on disk (basically just garbage). 731ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen // b. Used, unreferenced but meaningful data on disk (more garbage). 732ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen // c. A fully formed entry, reachable only through the index. 733ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen // d. A fully formed entry, also reachable through the lists, but still dirty. 734ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen // 735ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen // Anything after (b) can be automatically cleaned up. We may consider saving 736ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen // the current operation (as we do while manipulating the lists) so that we 737ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen // can detect and cleanup (a) and (b). 738ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen 739ea380985f4dd3c72953f7df161674e1644d6de90Kristian Monsen int num_blocks = EntryImpl::NumBlocksForEntry(key.size()); 740c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!block_files_.CreateBlock(BLOCK_256, num_blocks, &entry_address)) { 741c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(ERROR) << "Create entry failed " << key.c_str(); 742c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.OnEvent(Stats::CREATE_ERROR); 743c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return NULL; 744c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 745c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 746c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott Addr node_address(0); 747c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!block_files_.CreateBlock(RANKINGS, 1, &node_address)) { 748c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott block_files_.DeleteBlock(entry_address, false); 749c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(ERROR) << "Create entry failed " << key.c_str(); 750c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.OnEvent(Stats::CREATE_ERROR); 751c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return NULL; 752c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 753c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 7543345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick scoped_refptr<EntryImpl> cache_entry( 7553345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick new EntryImpl(this, entry_address, false)); 756c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott IncreaseNumRefs(); 757c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 758c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!cache_entry->CreateEntry(node_address, key, hash)) { 759c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott block_files_.DeleteBlock(entry_address, false); 760c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott block_files_.DeleteBlock(node_address, false); 761c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(ERROR) << "Create entry failed " << key.c_str(); 762c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.OnEvent(Stats::CREATE_ERROR); 763c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return NULL; 764c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 765c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 7663f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen cache_entry->BeginLogging(net_log_, true); 7673f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 768c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // We are not failing the operation; let's add this to the map. 769c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott open_entries_[entry_address.value()] = cache_entry; 770c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 771ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen // Save the entry. 772c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott block_files_.GetFile(entry_address)->Store(cache_entry->entry()); 773c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott block_files_.GetFile(node_address)->Store(cache_entry->rankings()); 774c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott IncreaseNumEntries(); 775c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch entry_count_++; 776ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen 777ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen // Link this entry through the index. 778ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen if (parent.get()) { 779ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen parent->SetNextAddress(entry_address); 780ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen } else { 781c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->table[hash & mask_] = entry_address.value(); 782ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen } 783ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen 784ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen // Link this entry through the lists. 785ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen eviction_.OnCreateEntry(cache_entry); 786c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 787c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(AGE_MS, "CreateTime", GetSizeGroup(), start); 788c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.OnEvent(Stats::CREATE_HIT); 789dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen SIMPLE_STATS_COUNTER("disk_cache.miss"); 790c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott Trace("create entry hit "); 791c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return cache_entry.release(); 792c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 793c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 794c407dc5cd9bdc5668497f21b26b09d988ab439deBen MurdochEntryImpl* BackendImpl::OpenNextEntryImpl(void** iter) { 795c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return OpenFollowingEntry(true, iter); 796c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 797c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 798c407dc5cd9bdc5668497f21b26b09d988ab439deBen MurdochEntryImpl* BackendImpl::OpenPrevEntryImpl(void** iter) { 799c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return OpenFollowingEntry(false, iter); 800c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 801c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 802c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottbool BackendImpl::SetMaxSize(int max_bytes) { 803c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott COMPILE_ASSERT(sizeof(max_bytes) == sizeof(max_size_), unsupported_int_model); 804c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (max_bytes < 0) 805c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 806c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 807c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Zero size means use the default. 808c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!max_bytes) 809c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return true; 810c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 811c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Avoid a DCHECK later on. 812c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (max_bytes >= kint32max - kint32max / 10) 813c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott max_bytes = kint32max - kint32max / 10 - 1; 814c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 815c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott user_flags_ |= kMaxSize; 816c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott max_size_ = max_bytes; 817c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return true; 818c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 819c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 820c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::SetType(net::CacheType type) { 821c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott DCHECK(type != net::MEMORY_CACHE); 822c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cache_type_ = type; 823c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 824c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 825c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick ScottFilePath BackendImpl::GetFileName(Addr address) const { 826c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!address.is_separate_file() || !address.is_initialized()) { 827c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott NOTREACHED(); 828c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return FilePath(); 829c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 830c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 8313345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick std::string tmp = base::StringPrintf("f_%06x", address.FileNumber()); 832c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return path_.AppendASCII(tmp); 833c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 834c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 835c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick ScottMappedFile* BackendImpl::File(Addr address) { 836c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (disabled_) 837c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return NULL; 838c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return block_files_.GetFile(address); 839c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 840c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 841c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottbool BackendImpl::CreateExternalFile(Addr* address) { 842c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int file_number = data_->header.last_file + 1; 843c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott Addr file_address(0); 844c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott bool success = false; 845c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott for (int i = 0; i < 0x0fffffff; i++, file_number++) { 846c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!file_address.SetFileNumber(file_number)) { 847c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott file_number = 1; 848c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott continue; 849c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 850c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott FilePath name = GetFileName(file_address); 851c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int flags = base::PLATFORM_FILE_READ | 852c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott base::PLATFORM_FILE_WRITE | 853c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott base::PLATFORM_FILE_CREATE | 854c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott base::PLATFORM_FILE_EXCLUSIVE_WRITE; 855dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen base::PlatformFileError error; 856c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott scoped_refptr<disk_cache::File> file(new disk_cache::File( 857dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen base::CreatePlatformFile(name, flags, NULL, &error))); 858dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen if (!file->IsValid()) { 859dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen if (error != base::PLATFORM_FILE_ERROR_EXISTS) 860dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen return false; 861c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott continue; 862dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen } 863c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 864c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott success = true; 865c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott break; 866c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 867c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 868c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott DCHECK(success); 869c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!success) 870c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 871c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 872c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->header.last_file = file_number; 873c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott address->set_value(file_address.value()); 874c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return true; 875c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 876c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 877c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottbool BackendImpl::CreateBlock(FileType block_type, int block_count, 878c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott Addr* block_address) { 879c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return block_files_.CreateBlock(block_type, block_count, block_address); 880c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 881c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 882c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::DeleteBlock(Addr block_address, bool deep) { 883c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott block_files_.DeleteBlock(block_address, deep); 884c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 885c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 886c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick ScottLruData* BackendImpl::GetLruData() { 887c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return &data_->header.lru; 888c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 889c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 890c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::UpdateRank(EntryImpl* entry, bool modified) { 891c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!read_only_) { 892c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott eviction_.UpdateRank(entry, modified); 893c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 894c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 895c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 896c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::RecoveredEntry(CacheRankingsBlock* rankings) { 897c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott Addr address(rankings->Data()->contents); 898c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott EntryImpl* cache_entry = NULL; 899dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen if (NewEntry(address, &cache_entry)) 900c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return; 901c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 902c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott uint32 hash = cache_entry->GetHash(); 903c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cache_entry->Release(); 904c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 905c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Anything on the table means that this entry is there. 906c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (data_->table[hash & mask_]) 907c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return; 908c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 909c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->table[hash & mask_] = address.value(); 910c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 911c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 912c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::InternalDoomEntry(EntryImpl* entry) { 913c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott uint32 hash = entry->GetHash(); 914c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott std::string key = entry->GetKey(); 91572a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen Addr entry_addr = entry->entry()->address(); 91672a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen bool error; 91772a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen EntryImpl* parent_entry = MatchEntry(key, hash, true, entry_addr, &error); 918c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CacheAddr child(entry->GetNextAddress()); 919c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 920c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott Trace("Doom entry 0x%p", entry); 921c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 922dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen if (!entry->doomed()) { 923dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen // We may have doomed this entry from within MatchEntry. 924dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen eviction_.OnDoomEntry(entry); 925dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen entry->InternalDoom(); 926dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen if (!new_eviction_) { 927dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen DecreaseNumEntries(); 928dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen } 929dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen stats_.OnEvent(Stats::DOOM_ENTRY); 930dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen } 931c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 932c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (parent_entry) { 933c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott parent_entry->SetNextAddress(Addr(child)); 934c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott parent_entry->Release(); 93572a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen } else if (!error) { 936c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->table[hash & mask_] = child; 937c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 938c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 939c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 940c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// An entry may be linked on the DELETED list for a while after being doomed. 941c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// This function is called when we want to remove it. 942c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::RemoveEntry(EntryImpl* entry) { 943c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!new_eviction_) 944c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return; 945c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 946c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott DCHECK(ENTRY_NORMAL != entry->entry()->Data()->state); 947c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 948c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott Trace("Remove entry 0x%p", entry); 949c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott eviction_.OnDestroyEntry(entry); 950c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott DecreaseNumEntries(); 951c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 952c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 9533345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrickvoid BackendImpl::OnEntryDestroyBegin(Addr address) { 954c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott EntriesMap::iterator it = open_entries_.find(address.value()); 955c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (it != open_entries_.end()) 956c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott open_entries_.erase(it); 9573345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 9583345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 9593345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrickvoid BackendImpl::OnEntryDestroyEnd() { 960c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott DecreaseNumRefs(); 9613345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if (data_->header.num_bytes > max_size_ && !read_only_) 9623345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick eviction_.TrimCache(false); 963c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 964c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 965c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick ScottEntryImpl* BackendImpl::GetOpenEntry(CacheRankingsBlock* rankings) const { 966c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott DCHECK(rankings->HasData()); 967c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott EntriesMap::const_iterator it = 968c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott open_entries_.find(rankings->Data()->contents); 969c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (it != open_entries_.end()) { 970c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // We have this entry in memory. 971c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return it->second; 972c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 973c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 974c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return NULL; 975c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 976c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 977c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottint32 BackendImpl::GetCurrentEntryId() const { 978c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return data_->header.this_id; 979c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 980c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 981c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottint BackendImpl::MaxFileSize() const { 982c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return max_size_ / 8; 983c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 984c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 985c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::ModifyStorageSize(int32 old_size, int32 new_size) { 986c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (disabled_ || old_size == new_size) 987c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return; 988c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (old_size > new_size) 989c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott SubstractStorageSize(old_size - new_size); 990c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott else 991c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott AddStorageSize(new_size - old_size); 992c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 993c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Update the usage statistics. 994c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.ModifyStorageStats(old_size, new_size); 995c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 996c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 997c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::TooMuchStorageRequested(int32 size) { 998c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.ModifyStorageStats(0, size); 999c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1000c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 10013345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrickbool BackendImpl::IsAllocAllowed(int current_size, int new_size) { 10023345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick DCHECK_GT(new_size, current_size); 10033345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if (user_flags_ & kNoBuffering) 10043345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return false; 10053345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 10063345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick int to_add = new_size - current_size; 10073345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if (buffer_bytes_ + to_add > MaxBuffersSize()) 10083345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return false; 10093345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 10103345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick buffer_bytes_ += to_add; 10113345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick CACHE_UMA(COUNTS_50000, "BufferBytes", 0, buffer_bytes_ / 1024); 10123345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return true; 10133345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 10143345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 10153345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrickvoid BackendImpl::BufferDeleted(int size) { 10163345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick buffer_bytes_ -= size; 10173345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick DCHECK_GE(size, 0); 10183345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 10193345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 1020c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottbool BackendImpl::IsLoaded() const { 1021c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(COUNTS, "PendingIO", GetSizeGroup(), num_pending_io_); 1022c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (user_flags_ & kNoLoadProtection) 1023c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 1024c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1025c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return num_pending_io_ > 5; 1026c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1027c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1028c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottstd::string BackendImpl::HistogramName(const char* name, int experiment) const { 1029c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!experiment) 10303345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return base::StringPrintf("DiskCache.%d.%s", cache_type_, name); 10313345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return base::StringPrintf("DiskCache.%d.%s_%d", cache_type_, 10323345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick name, experiment); 10333345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 10343345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 10353345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrickbase::WeakPtr<BackendImpl> BackendImpl::GetWeakPtr() { 10363345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return ptr_factory_.GetWeakPtr(); 1037c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1038c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1039c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottint BackendImpl::GetSizeGroup() const { 1040c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (disabled_) 1041c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return 0; 1042c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1043c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // We want to report times grouped by the current cache size (50 MB groups). 1044c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int group = data_->header.num_bytes / (50 * 1024 * 1024); 1045c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (group > 6) 1046c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott group = 6; // Limit the number of groups, just in case. 1047c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return group; 1048c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1049c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1050c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// We want to remove biases from some histograms so we only send data once per 1051c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// week. 1052c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottbool BackendImpl::ShouldReportAgain() { 1053c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (uma_report_) 1054c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return uma_report_ == 2; 1055c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1056c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott uma_report_++; 1057c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int64 last_report = stats_.GetCounter(Stats::LAST_REPORT); 1058c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott Time last_time = Time::FromInternalValue(last_report); 1059c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!last_report || (Time::Now() - last_time).InDays() >= 7) { 1060c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.SetCounter(Stats::LAST_REPORT, Time::Now().ToInternalValue()); 1061c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott uma_report_++; 1062c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return true; 1063c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1064c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 1065c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1066c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1067c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::FirstEviction() { 1068c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott DCHECK(data_->header.create_time); 1069dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen if (!GetEntryCount()) 1070dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen return; // This is just for unit tests. 1071c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1072c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott Time create_time = Time::FromInternalValue(data_->header.create_time); 1073c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(AGE, "FillupAge", 0, create_time); 1074c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1075c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch int64 use_time = stats_.GetCounter(Stats::TIMER); 1076c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch CACHE_UMA(HOURS, "FillupTime", 0, static_cast<int>(use_time / 120)); 1077c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(PERCENTAGE, "FirstHitRatio", 0, stats_.GetHitRatio()); 1078c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1079c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (!use_time) 1080c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch use_time = 1; 1081c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch CACHE_UMA(COUNTS_10000, "FirstEntryAccessRate", 0, 1082c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch static_cast<int>(data_->header.num_entries / use_time)); 1083c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch CACHE_UMA(COUNTS, "FirstByteIORate", 0, 1084c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch static_cast<int>((data_->header.num_bytes / 1024) / use_time)); 1085c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 1086c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int avg_size = data_->header.num_bytes / GetEntryCount(); 1087c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(COUNTS, "FirstEntrySize", 0, avg_size); 1088c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1089c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int large_entries_bytes = stats_.GetLargeEntriesSize(); 1090c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int large_ratio = large_entries_bytes * 100 / data_->header.num_bytes; 1091c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(PERCENTAGE, "FirstLargeEntriesRatio", 0, large_ratio); 1092c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1093c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (new_eviction_) { 1094c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(PERCENTAGE, "FirstResurrectRatio", 0, stats_.GetResurrectRatio()); 1095c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(PERCENTAGE, "FirstNoUseRatio", 0, 1096c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->header.lru.sizes[0] * 100 / data_->header.num_entries); 1097c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(PERCENTAGE, "FirstLowUseRatio", 0, 1098c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->header.lru.sizes[1] * 100 / data_->header.num_entries); 1099c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(PERCENTAGE, "FirstHighUseRatio", 0, 1100c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->header.lru.sizes[2] * 100 / data_->header.num_entries); 1101c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1102c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1103c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.ResetRatios(); 1104c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1105c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1106c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::CriticalError(int error) { 1107c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(ERROR) << "Critical error found " << error; 1108c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (disabled_) 1109c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return; 1110c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 11113f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen stats_.OnEvent(Stats::FATAL_ERROR); 1112c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LogStats(); 1113c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott ReportError(error); 1114c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1115c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Setting the index table length to an invalid value will force re-creation 1116c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // of the cache files. 1117c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->header.table_len = 1; 1118c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott disabled_ = true; 1119c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1120c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!num_refs_) 1121c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott MessageLoop::current()->PostTask(FROM_HERE, 11223f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen factory_.NewRunnableMethod(&BackendImpl::RestartCache, true)); 1123c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1124c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1125c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::ReportError(int error) { 1126c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // We transmit positive numbers, instead of direct error codes. 1127c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch DCHECK_LE(error, 0); 1128c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(CACHE_ERROR, "Error", 0, error * -1); 1129c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1130c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1131c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::OnEvent(Stats::Counters an_event) { 1132c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.OnEvent(an_event); 1133c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1134c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1135c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochvoid BackendImpl::OnRead(int32 bytes) { 1136c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch DCHECK_GE(bytes, 0); 1137c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch byte_count_ += bytes; 1138c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (byte_count_ < 0) 1139c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch byte_count_ = kint32max; 1140c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch} 1141c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 1142c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochvoid BackendImpl::OnWrite(int32 bytes) { 1143c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // We use the same implementation as OnRead... just log the number of bytes. 1144c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch OnRead(bytes); 1145c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch} 1146c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 1147c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::OnStatsTimer() { 1148c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.OnEvent(Stats::TIMER); 1149c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int64 time = stats_.GetCounter(Stats::TIMER); 1150c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int64 current = stats_.GetCounter(Stats::OPEN_ENTRIES); 1151c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1152c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // OPEN_ENTRIES is a sampled average of the number of open entries, avoiding 1153c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // the bias towards 0. 1154c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (num_refs_ && (current != num_refs_)) { 1155c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int64 diff = (num_refs_ - current) / 50; 1156c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!diff) 1157c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott diff = num_refs_ > current ? 1 : -1; 1158c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott current = current + diff; 1159c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.SetCounter(Stats::OPEN_ENTRIES, current); 1160c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.SetCounter(Stats::MAX_ENTRIES, max_refs_); 1161c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1162c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1163c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(COUNTS, "NumberOfReferences", 0, num_refs_); 1164c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1165c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch CACHE_UMA(COUNTS_10000, "EntryAccessRate", 0, entry_count_); 1166c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch CACHE_UMA(COUNTS, "ByteIORate", 0, byte_count_ / 1024); 1167c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch entry_count_ = 0; 1168c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch byte_count_ = 0; 1169c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 1170c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!data_) 1171c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott first_timer_ = false; 1172c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (first_timer_) { 1173c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott first_timer_ = false; 1174c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (ShouldReportAgain()) 1175c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott ReportStats(); 1176c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1177c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1178c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Save stats to disk at 5 min intervals. 1179c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (time % 10 == 0) 1180c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.Store(); 1181c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1182c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1183c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::IncrementIoCount() { 1184c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott num_pending_io_++; 1185c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1186c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1187c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::DecrementIoCount() { 1188c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott num_pending_io_--; 1189c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1190c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1191c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::SetUnitTestMode() { 1192c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott user_flags_ |= kUnitTestMode; 1193c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott unit_test_ = true; 1194c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1195c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1196c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::SetUpgradeMode() { 1197c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott user_flags_ |= kUpgradeMode; 1198c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott read_only_ = true; 1199c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1200c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1201c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::SetNewEviction() { 1202c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott user_flags_ |= kNewEviction; 1203c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott new_eviction_ = true; 1204c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1205c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1206c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::SetFlags(uint32 flags) { 1207c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott user_flags_ |= flags; 1208c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1209c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1210c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::ClearRefCountForTest() { 1211c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott num_refs_ = 0; 1212c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1213c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1214c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochint BackendImpl::FlushQueueForTest(CompletionCallback* callback) { 1215c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch background_queue_.FlushQueue(callback); 1216c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return net::ERR_IO_PENDING; 1217c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch} 1218c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 12193345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrickint BackendImpl::RunTaskForTest(Task* task, CompletionCallback* callback) { 12203345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick background_queue_.RunTask(task, callback); 12213345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return net::ERR_IO_PENDING; 12223345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 12233345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 122472a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsenvoid BackendImpl::TrimForTest(bool empty) { 122572a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen eviction_.SetTestMode(); 122672a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen eviction_.TrimCache(empty); 122772a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen} 122872a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen 122972a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsenvoid BackendImpl::TrimDeletedListForTest(bool empty) { 123072a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen eviction_.SetTestMode(); 123172a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen eviction_.TrimDeletedList(empty); 123272a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen} 123372a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen 1234c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottint BackendImpl::SelfCheck() { 1235c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!init_) { 1236c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(ERROR) << "Init failed"; 1237c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return ERR_INIT_FAILED; 1238c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1239c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1240c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int num_entries = rankings_.SelfCheck(); 1241c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (num_entries < 0) { 1242c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(ERROR) << "Invalid rankings list, error " << num_entries; 1243c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return num_entries; 1244c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1245c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1246c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (num_entries != data_->header.num_entries) { 1247c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(ERROR) << "Number of entries mismatch"; 1248c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return ERR_NUM_ENTRIES_MISMATCH; 1249c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1250c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1251c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return CheckAllEntries(); 1252c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1253c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1254c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// ------------------------------------------------------------------------ 1255c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 12563f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsenint32 BackendImpl::GetEntryCount() const { 12573f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen if (!index_ || disabled_) 12583f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen return 0; 12593f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen // num_entries includes entries already evicted. 12603f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen int32 not_deleted = data_->header.num_entries - 12613f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen data_->header.lru.sizes[Rankings::DELETED]; 12623f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 12633f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen if (not_deleted < 0) { 12643f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen NOTREACHED(); 12653f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen not_deleted = 0; 12663f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen } 12673f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 12683f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen return not_deleted; 12693f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen} 12703f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 12713f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsenint BackendImpl::OpenEntry(const std::string& key, Entry** entry, 12723f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen CompletionCallback* callback) { 12733f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen DCHECK(callback); 12743f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen background_queue_.OpenEntry(key, entry, callback); 12753f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen return net::ERR_IO_PENDING; 12763f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen} 12773f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 12783f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsenint BackendImpl::CreateEntry(const std::string& key, Entry** entry, 12793f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen CompletionCallback* callback) { 12803f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen DCHECK(callback); 12813f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen background_queue_.CreateEntry(key, entry, callback); 12823f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen return net::ERR_IO_PENDING; 12833f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen} 12843f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 12853f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsenint BackendImpl::DoomEntry(const std::string& key, 12863f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen CompletionCallback* callback) { 12873f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen DCHECK(callback); 12883f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen background_queue_.DoomEntry(key, callback); 12893f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen return net::ERR_IO_PENDING; 12903f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen} 12913f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 12923f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsenint BackendImpl::DoomAllEntries(CompletionCallback* callback) { 12933f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen DCHECK(callback); 12943f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen background_queue_.DoomAllEntries(callback); 12953f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen return net::ERR_IO_PENDING; 12963f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen} 12973f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 12983f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsenint BackendImpl::DoomEntriesBetween(const base::Time initial_time, 12993f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen const base::Time end_time, 13003f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen CompletionCallback* callback) { 13013f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen DCHECK(callback); 13023f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen background_queue_.DoomEntriesBetween(initial_time, end_time, callback); 13033f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen return net::ERR_IO_PENDING; 13043f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen} 13053f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 13063f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsenint BackendImpl::DoomEntriesSince(const base::Time initial_time, 13073f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen CompletionCallback* callback) { 13083f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen DCHECK(callback); 13093f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen background_queue_.DoomEntriesSince(initial_time, callback); 13103f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen return net::ERR_IO_PENDING; 13113f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen} 13123f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 13133f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsenint BackendImpl::OpenNextEntry(void** iter, Entry** next_entry, 13143f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen CompletionCallback* callback) { 13153f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen DCHECK(callback); 13163f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen background_queue_.OpenNextEntry(iter, next_entry, callback); 13173f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen return net::ERR_IO_PENDING; 13183f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen} 13193f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 13203f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsenvoid BackendImpl::EndEnumeration(void** iter) { 13213f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen background_queue_.EndEnumeration(*iter); 13223f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen *iter = NULL; 13233f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen} 13243f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 13253f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsenvoid BackendImpl::GetStats(StatsItems* stats) { 13263f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen if (disabled_) 13273f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen return; 13283f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 13293f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen std::pair<std::string, std::string> item; 13303f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 13313f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen item.first = "Entries"; 13323f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen item.second = base::StringPrintf("%d", data_->header.num_entries); 13333f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen stats->push_back(item); 13343f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 13353f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen item.first = "Pending IO"; 13363f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen item.second = base::StringPrintf("%d", num_pending_io_); 13373f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen stats->push_back(item); 13383f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 13393f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen item.first = "Max size"; 13403f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen item.second = base::StringPrintf("%d", max_size_); 13413f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen stats->push_back(item); 13423f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 13433f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen item.first = "Current size"; 13443f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen item.second = base::StringPrintf("%d", data_->header.num_bytes); 13453f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen stats->push_back(item); 13463f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 13473f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen stats_.GetItems(stats); 13483f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen} 13493f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 13503f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen// ------------------------------------------------------------------------ 13513f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 1352c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// We just created a new file so we're going to write the header and set the 1353c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// file length to include the hash table (zero filled). 1354c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottbool BackendImpl::CreateBackingStore(disk_cache::File* file) { 1355c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott AdjustMaxCacheSize(0); 1356c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1357c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott IndexHeader header; 1358c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott header.table_len = DesiredIndexTableLen(max_size_); 1359c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1360c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // We need file version 2.1 for the new eviction algorithm. 1361c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (new_eviction_) 1362c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott header.version = 0x20001; 1363c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1364c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott header.create_time = Time::Now().ToInternalValue(); 1365c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1366c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!file->Write(&header, sizeof(header), 0)) 1367c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 1368c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1369c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return file->SetLength(GetIndexSize(header.table_len)); 1370c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1371c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1372c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottbool BackendImpl::InitBackingStore(bool* file_created) { 1373c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott file_util::CreateDirectory(path_); 1374c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1375c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott FilePath index_name = path_.AppendASCII(kIndexName); 1376c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1377c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int flags = base::PLATFORM_FILE_READ | 1378c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott base::PLATFORM_FILE_WRITE | 1379c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott base::PLATFORM_FILE_OPEN_ALWAYS | 1380c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott base::PLATFORM_FILE_EXCLUSIVE_WRITE; 1381c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott scoped_refptr<disk_cache::File> file(new disk_cache::File( 13823345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick base::CreatePlatformFile(index_name, flags, file_created, NULL))); 1383c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1384c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!file->IsValid()) 1385c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 1386c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1387c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott bool ret = true; 1388c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (*file_created) 1389c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott ret = CreateBackingStore(file); 1390c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1391c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott file = NULL; 1392c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!ret) 1393c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 1394c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1395c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott index_ = new MappedFile(); 1396c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_ = reinterpret_cast<Index*>(index_->Init(index_name, 0)); 1397c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!data_) { 1398c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(ERROR) << "Unable to map Index file"; 1399c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 1400c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1401c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 1402c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (index_->GetLength() < sizeof(Index)) { 1403c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // We verify this again on CheckIndex() but it's easier to make sure now 1404c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // that the header is there. 1405c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch LOG(ERROR) << "Corrupt Index file"; 1406c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return false; 1407c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch } 1408c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 1409c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return true; 1410c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1411c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1412c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// The maximum cache size will be either set explicitly by the caller, or 1413c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// calculated by this code. 1414c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::AdjustMaxCacheSize(int table_len) { 1415c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (max_size_) 1416c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return; 1417c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1418c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // If table_len is provided, the index file exists. 1419c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott DCHECK(!table_len || data_->header.magic); 1420c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1421c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // The user is not setting the size, let's figure it out. 142200d26a728db2814620f390b418a7d6325ce5aca6Ben Murdoch#ifdef ANDROID 142300d26a728db2814620f390b418a7d6325ce5aca6Ben Murdoch int64 available = 10 * 1024 * 1024; // 10 MB 142400d26a728db2814620f390b418a7d6325ce5aca6Ben Murdoch#else 1425c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int64 available = base::SysInfo::AmountOfFreeDiskSpace(path_); 142600d26a728db2814620f390b418a7d6325ce5aca6Ben Murdoch#endif 1427c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (available < 0) { 1428c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott max_size_ = kDefaultCacheSize; 1429c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return; 1430c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1431c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1432c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (table_len) 1433c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott available += data_->header.num_bytes; 1434c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1435c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott max_size_ = PreferedCacheSize(available); 1436c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1437c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Let's not use more than the default size while we tune-up the performance 1438c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // of bigger caches. TODO(rvargas): remove this limit. 1439c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (max_size_ > kDefaultCacheSize * 4) 1440c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott max_size_ = kDefaultCacheSize * 4; 1441c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1442c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!table_len) 1443c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return; 1444c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1445c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // If we already have a table, adjust the size to it. 1446c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int current_max_size = MaxStorageSizeForTable(table_len); 1447c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (max_size_ > current_max_size) 1448c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott max_size_= current_max_size; 1449c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1450c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 14513f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsenvoid BackendImpl::RestartCache(bool failure) { 1452c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int64 errors = stats_.GetCounter(Stats::FATAL_ERROR); 14533f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen int64 full_dooms = stats_.GetCounter(Stats::DOOM_CACHE); 14543f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen int64 partial_dooms = stats_.GetCounter(Stats::DOOM_RECENT); 145572a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen int64 last_report = stats_.GetCounter(Stats::LAST_REPORT); 14563f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 14573f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen PrepareForRestart(); 14583f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen if (failure) { 14593f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen DCHECK(!num_refs_); 14603f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen DCHECK(!open_entries_.size()); 14613f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen DelayedCacheCleanup(path_); 14623f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen } else { 14633f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen DeleteCache(path_, false); 14643f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen } 1465c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1466c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Don't call Init() if directed by the unit test: we are simulating a failure 1467c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // trying to re-enable the cache. 1468c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (unit_test_) 1469c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott init_ = true; // Let the destructor do proper cleanup. 14703f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen else if (SyncInit() == net::OK) { 14713f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen stats_.SetCounter(Stats::FATAL_ERROR, errors); 14723f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen stats_.SetCounter(Stats::DOOM_CACHE, full_dooms); 14733f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen stats_.SetCounter(Stats::DOOM_RECENT, partial_dooms); 147472a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen stats_.SetCounter(Stats::LAST_REPORT, last_report); 14753f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen } 1476c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1477c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1478c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::PrepareForRestart() { 1479c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Reset the mask_ if it was not given by the user. 1480c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!(user_flags_ & kMask)) 1481c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott mask_ = 0; 1482c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1483c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!(user_flags_ & kNewEviction)) 1484c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott new_eviction_ = false; 1485c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 14863f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen disabled_ = true; 1487a7f1721675b8b6e0389732f1e25788012f7c20b7Magnus Hallqvist#ifdef ANDROID 1488a7f1721675b8b6e0389732f1e25788012f7c20b7Magnus Hallqvist if (data_) { 1489a7f1721675b8b6e0389732f1e25788012f7c20b7Magnus Hallqvist#endif 1490a7f1721675b8b6e0389732f1e25788012f7c20b7Magnus Hallqvist data_->header.crash = 0; 1491a7f1721675b8b6e0389732f1e25788012f7c20b7Magnus Hallqvist#ifdef ANDROID 1492a7f1721675b8b6e0389732f1e25788012f7c20b7Magnus Hallqvist } 1493a7f1721675b8b6e0389732f1e25788012f7c20b7Magnus Hallqvist#endif 1494c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott index_ = NULL; 1495c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_ = NULL; 1496c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott block_files_.CloseFiles(); 1497c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott rankings_.Reset(); 1498c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott init_ = false; 1499c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott restarted_ = true; 1500c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1501c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1502dc0f95d653279beabeb9817299e2902918ba123eKristian Monsenint BackendImpl::NewEntry(Addr address, EntryImpl** entry) { 1503c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott EntriesMap::iterator it = open_entries_.find(address.value()); 1504c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (it != open_entries_.end()) { 1505c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Easy job. This entry is already in memory. 1506c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott EntryImpl* this_entry = it->second; 1507c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott this_entry->AddRef(); 1508c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott *entry = this_entry; 1509c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return 0; 1510c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1511c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 15123345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick scoped_refptr<EntryImpl> cache_entry( 15133345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick new EntryImpl(this, address, read_only_)); 1514c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott IncreaseNumRefs(); 1515c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott *entry = NULL; 1516c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1517c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!address.is_initialized() || address.is_separate_file() || 1518c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott address.file_type() != BLOCK_256) { 1519c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(WARNING) << "Wrong entry address."; 1520c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return ERR_INVALID_ADDRESS; 1521c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1522c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1523c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch TimeTicks start = TimeTicks::Now(); 1524c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!cache_entry->entry()->Load()) 1525c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return ERR_READ_FAILURE; 1526c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1527c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (IsLoaded()) { 1528c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch CACHE_UMA(AGE_MS, "LoadTime", GetSizeGroup(), start); 1529c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch } 1530c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 1531c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!cache_entry->SanityCheck()) { 1532c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(WARNING) << "Messed up entry found."; 1533c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return ERR_INVALID_ENTRY; 1534c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1535c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1536c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!cache_entry->LoadNodeAddress()) 1537c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return ERR_READ_FAILURE; 1538c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1539c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Prevent overwriting the dirty flag on the destructor. 1540dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen cache_entry->SetDirtyFlag(GetCurrentEntryId()); 1541c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1542ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen if (!rankings_.SanityCheck(cache_entry->rankings(), false)) { 1543ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen cache_entry->SetDirtyFlag(0); 1544ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen // Don't remove this from the list (it is not linked properly). Instead, 1545ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen // break the link back to the entry because it is going away, and leave the 1546ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen // rankings node to be deleted if we find it through a list. 1547ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen rankings_.SetContents(cache_entry->rankings(), 0); 1548ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen } else if (!rankings_.DataSanityCheck(cache_entry->rankings(), false)) { 1549ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen cache_entry->SetDirtyFlag(0); 1550ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen rankings_.SetContents(cache_entry->rankings(), address.value()); 1551ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen } 1552ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen 1553ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen if (!cache_entry->DataSanityCheck()) { 1554ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen LOG(WARNING) << "Messed up entry found."; 1555ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen cache_entry->SetDirtyFlag(0); 1556ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen cache_entry->FixForDelete(); 1557ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen } 1558c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1559dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen if (cache_entry->dirty()) { 15603345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick Trace("Dirty entry 0x%p 0x%x", reinterpret_cast<void*>(cache_entry.get()), 15613345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick address.value()); 15623345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick } 1563c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1564dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen open_entries_[address.value()] = cache_entry; 1565dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen 15663f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen cache_entry->BeginLogging(net_log_, false); 1567c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cache_entry.swap(entry); 1568c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return 0; 1569c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1570c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1571c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick ScottEntryImpl* BackendImpl::MatchEntry(const std::string& key, uint32 hash, 157272a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen bool find_parent, Addr entry_addr, 157372a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen bool* match_error) { 1574c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott Addr address(data_->table[hash & mask_]); 1575c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott scoped_refptr<EntryImpl> cache_entry, parent_entry; 1576c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott EntryImpl* tmp = NULL; 1577c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott bool found = false; 157872a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen std::set<CacheAddr> visited; 157972a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen *match_error = false; 1580c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1581c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott for (;;) { 1582c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (disabled_) 1583c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott break; 1584c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 158572a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen if (visited.find(address.value()) != visited.end()) { 158672a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen // It's possible for a buggy version of the code to write a loop. Just 158772a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen // break it. 158872a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen Trace("Hash collision loop 0x%x", address.value()); 158972a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen address.set_value(0); 159072a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen parent_entry->SetNextAddress(address); 159172a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen } 159272a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen visited.insert(address.value()); 159372a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen 1594c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!address.is_initialized()) { 1595c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (find_parent) 1596c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott found = true; 1597c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott break; 1598c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1599c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1600dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen int error = NewEntry(address, &tmp); 1601c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cache_entry.swap(&tmp); 1602c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1603dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen if (error || cache_entry->dirty()) { 1604c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // This entry is dirty on disk (it was not properly closed): we cannot 1605c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // trust it. 1606c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott Addr child(0); 1607c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!error) 1608c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott child.set_value(cache_entry->GetNextAddress()); 1609c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1610c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (parent_entry) { 1611c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott parent_entry->SetNextAddress(child); 1612c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott parent_entry = NULL; 1613c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } else { 1614c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->table[hash & mask_] = child.value(); 1615c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1616c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1617dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen Trace("MatchEntry dirty %d 0x%x 0x%x", find_parent, entry_addr.value(), 1618dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen address.value()); 1619dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen 1620c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!error) { 1621c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // It is important to call DestroyInvalidEntry after removing this 1622c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // entry from the table. 1623c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott DestroyInvalidEntry(cache_entry); 1624c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cache_entry = NULL; 1625c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } else { 1626c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott Trace("NewEntry failed on MatchEntry 0x%x", address.value()); 1627c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1628c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1629c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Restart the search. 1630c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott address.set_value(data_->table[hash & mask_]); 163172a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen visited.clear(); 1632c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott continue; 1633c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1634c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 16353345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick DCHECK_EQ(hash & mask_, cache_entry->entry()->Data()->hash & mask_); 1636c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (cache_entry->IsSameEntry(key, hash)) { 1637c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!cache_entry->Update()) 1638c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cache_entry = NULL; 1639c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott found = true; 164072a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen if (find_parent && entry_addr.value() != address.value()) { 164172a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen Trace("Entry not on the index 0x%x", address.value()); 164272a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen *match_error = true; 164372a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen parent_entry = NULL; 164472a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen } 1645c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott break; 1646c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1647c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!cache_entry->Update()) 1648c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cache_entry = NULL; 1649c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott parent_entry = cache_entry; 1650c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cache_entry = NULL; 1651c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!parent_entry) 1652c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott break; 1653c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1654c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott address.set_value(parent_entry->GetNextAddress()); 1655c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1656c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1657c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (parent_entry && (!find_parent || !found)) 1658c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott parent_entry = NULL; 1659c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1660dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen if (find_parent && entry_addr.is_initialized() && !cache_entry) { 1661dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen *match_error = true; 1662dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen parent_entry = NULL; 1663dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen } 1664dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen 1665c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (cache_entry && (find_parent || !found)) 1666c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cache_entry = NULL; 1667c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1668c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott find_parent ? parent_entry.swap(&tmp) : cache_entry.swap(&tmp); 1669c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return tmp; 1670c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1671c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1672c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott// This is the actual implementation for OpenNextEntry and OpenPrevEntry. 1673c407dc5cd9bdc5668497f21b26b09d988ab439deBen MurdochEntryImpl* BackendImpl::OpenFollowingEntry(bool forward, void** iter) { 1674c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (disabled_) 1675c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return NULL; 1676c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1677c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott DCHECK(iter); 1678c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1679c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott const int kListsToSearch = 3; 1680c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott scoped_refptr<EntryImpl> entries[kListsToSearch]; 1681c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott scoped_ptr<Rankings::Iterator> iterator( 1682c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott reinterpret_cast<Rankings::Iterator*>(*iter)); 1683c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott *iter = NULL; 1684c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1685c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!iterator.get()) { 1686c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott iterator.reset(new Rankings::Iterator(&rankings_)); 1687c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott bool ret = false; 1688c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1689c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Get an entry from each list. 1690c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott for (int i = 0; i < kListsToSearch; i++) { 1691c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott EntryImpl* temp = NULL; 1692c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott ret |= OpenFollowingEntryFromList(forward, static_cast<Rankings::List>(i), 1693c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott &iterator->nodes[i], &temp); 1694c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott entries[i].swap(&temp); // The entry was already addref'd. 1695c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1696c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!ret) 1697c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return NULL; 1698c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } else { 1699c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // Get the next entry from the last list, and the actual entries for the 1700c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // elements on the other lists. 1701c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott for (int i = 0; i < kListsToSearch; i++) { 1702c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott EntryImpl* temp = NULL; 1703c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (iterator->list == i) { 1704c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott OpenFollowingEntryFromList(forward, iterator->list, 1705c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott &iterator->nodes[i], &temp); 1706c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } else { 1707ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen temp = GetEnumeratedEntry(iterator->nodes[i], 1708ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen static_cast<Rankings::List>(i)); 1709c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1710c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1711c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott entries[i].swap(&temp); // The entry was already addref'd. 1712c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1713c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1714c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1715c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int newest = -1; 1716c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int oldest = -1; 1717c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott Time access_times[kListsToSearch]; 1718c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott for (int i = 0; i < kListsToSearch; i++) { 1719c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (entries[i].get()) { 1720c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott access_times[i] = entries[i]->GetLastUsed(); 1721c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (newest < 0) { 1722c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch DCHECK_LT(oldest, 0); 1723c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott newest = oldest = i; 1724c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott continue; 1725c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1726c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (access_times[i] > access_times[newest]) 1727c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott newest = i; 1728c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (access_times[i] < access_times[oldest]) 1729c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott oldest = i; 1730c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1731c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1732c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1733c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (newest < 0 || oldest < 0) 1734c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return NULL; 1735c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1736c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch EntryImpl* next_entry; 1737c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (forward) { 1738c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch next_entry = entries[newest].release(); 1739c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott iterator->list = static_cast<Rankings::List>(newest); 1740c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } else { 1741c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch next_entry = entries[oldest].release(); 1742c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott iterator->list = static_cast<Rankings::List>(oldest); 1743c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1744c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1745c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott *iter = iterator.release(); 1746c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return next_entry; 1747c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1748c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1749c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottbool BackendImpl::OpenFollowingEntryFromList(bool forward, Rankings::List list, 1750c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CacheRankingsBlock** from_entry, 1751c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott EntryImpl** next_entry) { 1752c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (disabled_) 1753c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 1754c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1755c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!new_eviction_ && Rankings::NO_USE != list) 1756c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 1757c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1758c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott Rankings::ScopedRankingsBlock rankings(&rankings_, *from_entry); 1759c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CacheRankingsBlock* next_block = forward ? 1760c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott rankings_.GetNext(rankings.get(), list) : 1761c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott rankings_.GetPrev(rankings.get(), list); 1762c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott Rankings::ScopedRankingsBlock next(&rankings_, next_block); 1763c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott *from_entry = NULL; 1764c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1765ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen *next_entry = GetEnumeratedEntry(next.get(), list); 1766c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!*next_entry) 1767c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 1768c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1769c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott *from_entry = next.release(); 1770c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return true; 1771c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1772c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1773ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian MonsenEntryImpl* BackendImpl::GetEnumeratedEntry(CacheRankingsBlock* next, 1774ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen Rankings::List list) { 1775c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!next || disabled_) 1776c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return NULL; 1777c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1778c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott EntryImpl* entry; 1779ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen int rv = NewEntry(Addr(next->Data()->contents), &entry); 1780ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen if (rv) { 1781ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen rankings_.Remove(next, list, false); 1782ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen if (rv == ERR_INVALID_ADDRESS) { 1783ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen // There is nothing linked from the index. Delete the rankings node. 1784ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen DeleteBlock(next->address(), true); 1785ae2796cabb52f6a27c50818b78107d3ebc858e0cKristian Monsen } 1786c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return NULL; 1787dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen } 1788c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1789dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen if (entry->dirty()) { 1790dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen // We cannot trust this entry. 1791dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen InternalDoomEntry(entry); 1792dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen entry->Release(); 1793c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return NULL; 1794c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1795c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 179672a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen if (!entry->Update()) { 1797c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott entry->Release(); 1798c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return NULL; 1799c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1800c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 180172a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen // Note that it is unfortunate (but possible) for this entry to be clean, but 180272a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen // not actually the real entry. In other words, we could have lost this entry 180372a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen // from the index, and it could have been replaced with a newer one. It's not 180472a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen // worth checking that this entry is "the real one", so we just return it and 180572a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen // let the enumeration continue; this entry will be evicted at some point, and 180672a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen // the regular path will work with the real entry. With time, this problem 180772a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen // will disasappear because this scenario is just a bug. 180872a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen 1809c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // Make sure that we save the key for later. 1810c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch entry->GetKey(); 1811c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 1812c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return entry; 1813c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1814c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1815c407dc5cd9bdc5668497f21b26b09d988ab439deBen MurdochEntryImpl* BackendImpl::ResurrectEntry(EntryImpl* deleted_entry) { 1816c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (ENTRY_NORMAL == deleted_entry->entry()->Data()->state) { 1817c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott deleted_entry->Release(); 1818c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.OnEvent(Stats::CREATE_MISS); 1819c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott Trace("create entry miss "); 1820c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return NULL; 1821c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1822c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1823c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // We are attempting to create an entry and found out that the entry was 1824c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // previously deleted. 1825c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1826c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott eviction_.OnCreateEntry(deleted_entry); 1827c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch entry_count_++; 1828c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 18293345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick stats_.OnEvent(Stats::RESURRECT_HIT); 1830c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott Trace("Resurrect entry hit "); 1831c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return deleted_entry; 1832c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1833c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1834c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::DestroyInvalidEntry(EntryImpl* entry) { 1835c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(WARNING) << "Destroying invalid entry."; 1836c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott Trace("Destroying invalid entry 0x%p", entry); 1837c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1838c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott entry->SetPointerForInvalidEntry(GetCurrentEntryId()); 1839c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1840c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott eviction_.OnDoomEntry(entry); 1841c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott entry->InternalDoom(); 1842c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1843c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!new_eviction_) 1844c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott DecreaseNumEntries(); 1845c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.OnEvent(Stats::INVALID_ENTRY); 1846c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1847c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1848c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::AddStorageSize(int32 bytes) { 1849c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->header.num_bytes += bytes; 1850c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch DCHECK_GE(data_->header.num_bytes, 0); 1851c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1852c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1853c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::SubstractStorageSize(int32 bytes) { 1854c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->header.num_bytes -= bytes; 1855c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch DCHECK_GE(data_->header.num_bytes, 0); 1856c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1857c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1858c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::IncreaseNumRefs() { 1859c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott num_refs_++; 1860c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (max_refs_ < num_refs_) 1861c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott max_refs_ = num_refs_; 1862c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1863c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1864c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::DecreaseNumRefs() { 1865c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott DCHECK(num_refs_); 1866c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott num_refs_--; 1867c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1868c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!num_refs_ && disabled_) 1869c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott MessageLoop::current()->PostTask(FROM_HERE, 18703f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen factory_.NewRunnableMethod(&BackendImpl::RestartCache, true)); 1871c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1872c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1873c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::IncreaseNumEntries() { 1874c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->header.num_entries++; 1875c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch DCHECK_GT(data_->header.num_entries, 0); 1876c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1877c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1878c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::DecreaseNumEntries() { 1879c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->header.num_entries--; 1880c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (data_->header.num_entries < 0) { 1881c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott NOTREACHED(); 1882c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->header.num_entries = 0; 1883c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1884c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1885c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1886c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::LogStats() { 1887c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott StatsItems stats; 1888c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott GetStats(&stats); 1889c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1890731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick for (size_t index = 0; index < stats.size(); index++) 1891731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick VLOG(1) << stats[index].first << ": " << stats[index].second; 1892c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1893c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1894c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::ReportStats() { 1895c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(COUNTS, "Entries", 0, data_->header.num_entries); 18963345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 18973345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick int current_size = data_->header.num_bytes / (1024 * 1024); 18983345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick int max_size = max_size_ / (1024 * 1024); 18993345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick CACHE_UMA(COUNTS_10000, "Size2", 0, current_size); 19003345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick CACHE_UMA(COUNTS_10000, "MaxSize2", 0, max_size); 19013345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if (!max_size) 19023345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick max_size++; 19033345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick CACHE_UMA(PERCENTAGE, "UsedSpace", 0, current_size * 100 / max_size); 1904c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1905c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch CACHE_UMA(COUNTS_10000, "AverageOpenEntries2", 0, 1906c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott static_cast<int>(stats_.GetCounter(Stats::OPEN_ENTRIES))); 1907c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch CACHE_UMA(COUNTS_10000, "MaxOpenEntries2", 0, 1908c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott static_cast<int>(stats_.GetCounter(Stats::MAX_ENTRIES))); 1909c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.SetCounter(Stats::MAX_ENTRIES, 0); 1910c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 19113f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen CACHE_UMA(COUNTS_10000, "TotalFatalErrors", 0, 19123f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen static_cast<int>(stats_.GetCounter(Stats::FATAL_ERROR))); 19133f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen CACHE_UMA(COUNTS_10000, "TotalDoomCache", 0, 19143f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen static_cast<int>(stats_.GetCounter(Stats::DOOM_CACHE))); 19153f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen CACHE_UMA(COUNTS_10000, "TotalDoomRecentEntries", 0, 19163f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen static_cast<int>(stats_.GetCounter(Stats::DOOM_RECENT))); 191772a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen stats_.SetCounter(Stats::FATAL_ERROR, 0); 191872a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen stats_.SetCounter(Stats::DOOM_CACHE, 0); 191972a454cd3513ac24fbdd0e0cb9ad70b86a99b801Kristian Monsen stats_.SetCounter(Stats::DOOM_RECENT, 0); 19203f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen 19213f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen int64 total_hours = stats_.GetCounter(Stats::TIMER) / 120; 19223345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if (!data_->header.create_time || !data_->header.lru.filled) { 19233345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick int cause = data_->header.create_time ? 0 : 1; 19243345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if (!data_->header.lru.filled) 19253345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick cause |= 2; 19263345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick CACHE_UMA(CACHE_ERROR, "ShortReport", 0, cause); 19273f50c38dc070f4bb515c1b64450dae14f316474eKristian Monsen CACHE_UMA(HOURS, "TotalTimeNotFull", 0, static_cast<int>(total_hours)); 1928c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return; 19293345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick } 1930c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1931c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // This is an up to date client that will report FirstEviction() data. After 1932c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // that event, start reporting this: 1933c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1934c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(HOURS, "TotalTime", 0, static_cast<int>(total_hours)); 1935c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1936c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int64 use_hours = stats_.GetCounter(Stats::LAST_REPORT_TIMER) / 120; 1937c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.SetCounter(Stats::LAST_REPORT_TIMER, stats_.GetCounter(Stats::TIMER)); 1938c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1939c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // We may see users with no use_hours at this point if this is the first time 1940c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // we are running this code. 1941c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (use_hours) 1942c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott use_hours = total_hours - use_hours; 1943c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1944c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!use_hours || !GetEntryCount() || !data_->header.num_bytes) 1945c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return; 1946c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1947c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(HOURS, "UseTime", 0, static_cast<int>(use_hours)); 19483345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick CACHE_UMA(PERCENTAGE, "HitRatio", data_->header.experiment, 19493345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick stats_.GetHitRatio()); 1950c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1951c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int64 trim_rate = stats_.GetCounter(Stats::TRIM_ENTRY) / use_hours; 1952c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(COUNTS, "TrimRate", 0, static_cast<int>(trim_rate)); 1953c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1954c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int avg_size = data_->header.num_bytes / GetEntryCount(); 1955c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(COUNTS, "EntrySize", 0, avg_size); 1956c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch CACHE_UMA(COUNTS, "EntriesFull", 0, data_->header.num_entries); 1957c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 1958c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch CACHE_UMA(PERCENTAGE, "IndexLoad", 0, 1959c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch data_->header.num_entries * 100 / (mask_ + 1)); 1960c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1961c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int large_entries_bytes = stats_.GetLargeEntriesSize(); 1962c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int large_ratio = large_entries_bytes * 100 / data_->header.num_bytes; 1963c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(PERCENTAGE, "LargeEntriesRatio", 0, large_ratio); 1964c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1965c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (new_eviction_) { 19663345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick CACHE_UMA(PERCENTAGE, "ResurrectRatio", data_->header.experiment, 19673345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick stats_.GetResurrectRatio()); 1968c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(PERCENTAGE, "NoUseRatio", 0, 1969c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->header.lru.sizes[0] * 100 / data_->header.num_entries); 1970c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(PERCENTAGE, "LowUseRatio", 0, 1971c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->header.lru.sizes[1] * 100 / data_->header.num_entries); 1972c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott CACHE_UMA(PERCENTAGE, "HighUseRatio", 0, 1973c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->header.lru.sizes[2] * 100 / data_->header.num_entries); 19743345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick CACHE_UMA(PERCENTAGE, "DeletedRatio", data_->header.experiment, 1975c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->header.lru.sizes[4] * 100 / data_->header.num_entries); 1976c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 1977c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1978c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.ResetRatios(); 1979c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott stats_.SetCounter(Stats::TRIM_ENTRY, 0); 1980c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 1981c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (cache_type_ == net::DISK_CACHE) 1982c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch block_files_.ReportStats(); 1983c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1984c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1985c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottvoid BackendImpl::UpgradeTo2_1() { 1986c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // 2.1 is basically the same as 2.0, except that new fields are actually 1987c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // updated by the new eviction algorithm. 1988c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott DCHECK(0x20000 == data_->header.version); 1989c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->header.version = 0x20001; 1990c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->header.lru.sizes[Rankings::NO_USE] = data_->header.num_entries; 1991c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 1992c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1993c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottbool BackendImpl::CheckIndex() { 1994c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott DCHECK(data_); 1995c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 1996c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott size_t current_size = index_->GetLength(); 1997c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (current_size < sizeof(Index)) { 1998c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(ERROR) << "Corrupt Index file"; 1999c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 2000c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 2001c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 2002c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (new_eviction_) { 2003c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // We support versions 2.0 and 2.1, upgrading 2.0 to 2.1. 2004c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (kIndexMagic != data_->header.magic || 2005c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott kCurrentVersion >> 16 != data_->header.version >> 16) { 2006c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(ERROR) << "Invalid file version or magic"; 2007c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 2008c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 2009c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (kCurrentVersion == data_->header.version) { 2010c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott // We need file version 2.1 for the new eviction algorithm. 2011c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott UpgradeTo2_1(); 2012c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 2013c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } else { 2014c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (kIndexMagic != data_->header.magic || 2015c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott kCurrentVersion != data_->header.version) { 2016c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(ERROR) << "Invalid file version or magic"; 2017c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 2018c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 2019c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 2020c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 2021c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!data_->header.table_len) { 2022c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(ERROR) << "Invalid table size"; 2023c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 2024c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 2025c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 2026c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (current_size < GetIndexSize(data_->header.table_len) || 2027c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott data_->header.table_len & (kBaseTableLen - 1)) { 2028c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(ERROR) << "Corrupt Index file"; 2029c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 2030c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 2031c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 2032c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott AdjustMaxCacheSize(data_->header.table_len); 2033c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 2034c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch if (data_->header.num_bytes < 0 || 2035c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch (max_size_ < kint32max - kDefaultCacheSize && 2036c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch data_->header.num_bytes > max_size_ + kDefaultCacheSize)) { 2037c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(ERROR) << "Invalid cache (current) size"; 2038c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 2039c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 2040c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 2041c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (data_->header.num_entries < 0) { 2042c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(ERROR) << "Invalid number of entries"; 2043c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return false; 2044c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 2045c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 2046c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!mask_) 2047c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott mask_ = data_->header.table_len - 1; 2048c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 2049c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch // Load the table into memory with a single read. 2050c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch scoped_array<char> buf(new char[current_size]); 2051c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch return index_->Read(buf.get(), current_size, 0); 2052c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 2053c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 2054c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottint BackendImpl::CheckAllEntries() { 2055c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int num_dirty = 0; 2056c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott int num_entries = 0; 2057c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott DCHECK(mask_ < kuint32max); 2058c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott for (int i = 0; i <= static_cast<int>(mask_); i++) { 2059c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott Addr address(data_->table[i]); 2060c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!address.is_initialized()) 2061c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott continue; 2062c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott for (;;) { 2063c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott EntryImpl* tmp; 2064dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen int ret = NewEntry(address, &tmp); 2065c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (ret) 2066c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return ret; 2067c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott scoped_refptr<EntryImpl> cache_entry; 2068c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott cache_entry.swap(&tmp); 2069c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 2070dc0f95d653279beabeb9817299e2902918ba123eKristian Monsen if (cache_entry->dirty()) 2071c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott num_dirty++; 2072c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott else if (CheckEntry(cache_entry.get())) 2073c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott num_entries++; 2074c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott else 2075c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return ERR_INVALID_ENTRY; 2076c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 2077c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott address.set_value(cache_entry->GetNextAddress()); 2078c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (!address.is_initialized()) 2079c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott break; 2080c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 2081c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 2082c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 20833345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick Trace("CheckAllEntries End"); 2084c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott if (num_entries + num_dirty != data_->header.num_entries) { 2085c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott LOG(ERROR) << "Number of entries mismatch"; 2086c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return ERR_NUM_ENTRIES_MISMATCH; 2087c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott } 2088c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 2089c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott return num_dirty; 2090c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 2091c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 2092c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scottbool BackendImpl::CheckEntry(EntryImpl* cache_entry) { 20933345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick bool ok = block_files_.IsValid(cache_entry->entry()->address()); 20943345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick ok = ok && block_files_.IsValid(cache_entry->rankings()->address()); 20953345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick EntryStore* data = cache_entry->entry()->Data(); 20963345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick for (size_t i = 0; i < arraysize(data->data_addr); i++) { 20973345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if (data->data_addr[i]) { 20983345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick Addr address(data->data_addr[i]); 20993345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if (address.is_block_file()) 21003345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick ok = ok && block_files_.IsValid(address); 21013345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick } 21023345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick } 21033345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 2104c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott RankingsNode* rankings = cache_entry->rankings()->Data(); 21053345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return ok && !rankings->dummy; 21063345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick} 21073345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 21083345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrickint BackendImpl::MaxBuffersSize() { 21093345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick static int64 total_memory = base::SysInfo::AmountOfPhysicalMemory(); 21103345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick static bool done = false; 21113345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 21123345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if (!done) { 21133345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick const int kMaxBuffersSize = 30 * 1024 * 1024; 21143345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 21153345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick // We want to use up to 2% of the computer's memory. 21163345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick total_memory = total_memory * 2 / 100; 21173345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick if (total_memory > kMaxBuffersSize || total_memory <= 0) 21183345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick total_memory = kMaxBuffersSize; 21193345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 21203345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick done = true; 21213345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick } 21223345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 21233345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick return static_cast<int>(total_memory); 2124c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} 2125c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott 2126c7f5f8508d98d5952d42ed7648c2a8f30a4da156Patrick Scott} // namespace disk_cache 2127