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gecko-dev/netwerk/cache2/CacheFileIOManager.cpp

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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <limits>
#include "CacheLog.h"
#include "CacheFileIOManager.h"
#include "../cache/nsCacheUtils.h"
#include "CacheHashUtils.h"
#include "CacheStorageService.h"
#include "CacheIndex.h"
#include "CacheFileUtils.h"
#include "nsError.h"
#include "nsThreadUtils.h"
#include "CacheFile.h"
#include "CacheObserver.h"
#include "nsIFile.h"
#include "CacheFileContextEvictor.h"
#include "nsITimer.h"
#include "nsIDirectoryEnumerator.h"
#include "nsEffectiveTLDService.h"
#include "nsIObserverService.h"
#include "nsISizeOf.h"
#include "mozilla/net/MozURL.h"
#include "mozilla/Telemetry.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/Services.h"
#include "mozilla/StaticPrefs_network.h"
#include "mozilla/StoragePrincipalHelper.h"
#include "nsDirectoryServiceUtils.h"
#include "nsAppDirectoryServiceDefs.h"
#include "private/pprio.h"
#include "mozilla/IntegerPrintfMacros.h"
#include "mozilla/Preferences.h"
#include "nsNetUtil.h"
#include "prproces.h"
// include files for ftruncate (or equivalent)
#if defined(XP_UNIX)
# include <unistd.h>
#elif defined(XP_WIN)
# include <windows.h>
# undef CreateFile
# undef CREATE_NEW
#else
// XXX add necessary include file for ftruncate (or equivalent)
#endif
namespace mozilla::net {
#define kOpenHandlesLimit 128
#define kMetadataWriteDelay 5000
#define kRemoveTrashStartDelay 60000 // in milliseconds
#define kSmartSizeUpdateInterval 60000 // in milliseconds
#ifdef ANDROID
const uint32_t kMaxCacheSizeKB = 512 * 1024; // 512 MB
#else
const uint32_t kMaxCacheSizeKB = 1024 * 1024; // 1 GB
#endif
const uint32_t kMaxClearOnShutdownCacheSizeKB = 150 * 1024; // 150 MB
const auto kPurgeExtension = ".purge.bg_rm"_ns;
bool CacheFileHandle::DispatchRelease() {
if (CacheFileIOManager::IsOnIOThreadOrCeased()) {
return false;
}
nsCOMPtr<nsIEventTarget> ioTarget = CacheFileIOManager::IOTarget();
if (!ioTarget) {
return false;
}
nsresult rv = ioTarget->Dispatch(
NewNonOwningRunnableMethod("net::CacheFileHandle::Release", this,
&CacheFileHandle::Release),
nsIEventTarget::DISPATCH_NORMAL);
return NS_SUCCEEDED(rv);
}
NS_IMPL_ADDREF(CacheFileHandle)
NS_IMETHODIMP_(MozExternalRefCountType)
CacheFileHandle::Release() {
nsrefcnt count = mRefCnt - 1;
if (DispatchRelease()) {
// Redispatched to the IO thread.
return count;
}
MOZ_ASSERT(CacheFileIOManager::IsOnIOThreadOrCeased());
LOG(("CacheFileHandle::Release() [this=%p, refcnt=%" PRIuPTR "]", this,
mRefCnt.get()));
MOZ_ASSERT(0 != mRefCnt, "dup release");
count = --mRefCnt;
NS_LOG_RELEASE(this, count, "CacheFileHandle");
if (0 == count) {
mRefCnt = 1;
delete (this);
return 0;
}
return count;
}
NS_INTERFACE_MAP_BEGIN(CacheFileHandle)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
CacheFileHandle::CacheFileHandle(const SHA1Sum::Hash* aHash, bool aPriority,
PinningStatus aPinning)
: mHash(aHash),
mIsDoomed(false),
mClosed(false),
mPriority(aPriority),
mSpecialFile(false),
mInvalid(false),
mFileExists(false),
mDoomWhenFoundPinned(false),
mDoomWhenFoundNonPinned(false),
mKilled(false),
mPinning(aPinning),
mFileSize(-1),
mFD(nullptr) {
// If we initialize mDoomed in the initialization list, that initialization is
// not guaranteeded to be atomic. Whereas this assignment here is guaranteed
// to be atomic. TSan will see this (atomic) assignment and be satisfied
// that cross-thread accesses to mIsDoomed are properly synchronized.
mIsDoomed = false;
LOG((
"CacheFileHandle::CacheFileHandle() [this=%p, hash=%08x%08x%08x%08x%08x]",
this, LOGSHA1(aHash)));
}
CacheFileHandle::CacheFileHandle(const nsACString& aKey, bool aPriority,
PinningStatus aPinning)
: mHash(nullptr),
mIsDoomed(false),
mClosed(false),
mPriority(aPriority),
mSpecialFile(true),
mInvalid(false),
mFileExists(false),
mDoomWhenFoundPinned(false),
mDoomWhenFoundNonPinned(false),
mKilled(false),
mPinning(aPinning),
mFileSize(-1),
mFD(nullptr),
mKey(aKey) {
// See comment above about the initialization of mIsDoomed.
mIsDoomed = false;
LOG(("CacheFileHandle::CacheFileHandle() [this=%p, key=%s]", this,
PromiseFlatCString(aKey).get()));
}
CacheFileHandle::~CacheFileHandle() {
LOG(("CacheFileHandle::~CacheFileHandle() [this=%p]", this));
MOZ_ASSERT(CacheFileIOManager::IsOnIOThreadOrCeased());
RefPtr<CacheFileIOManager> ioMan = CacheFileIOManager::gInstance;
if (!IsClosed() && ioMan) {
ioMan->CloseHandleInternal(this);
}
}
void CacheFileHandle::Log() {
nsAutoCString leafName;
if (mFile) {
mFile->GetNativeLeafName(leafName);
}
if (mSpecialFile) {
LOG(
("CacheFileHandle::Log() - special file [this=%p, "
"isDoomed=%d, priority=%d, closed=%d, invalid=%d, "
"pinning=%" PRIu32 ", fileExists=%d, fileSize=%" PRId64
", leafName=%s, key=%s]",
this, bool(mIsDoomed), bool(mPriority), bool(mClosed), bool(mInvalid),
static_cast<uint32_t>(mPinning), bool(mFileExists), int64_t(mFileSize),
leafName.get(), mKey.get()));
} else {
LOG(
("CacheFileHandle::Log() - entry file [this=%p, "
"hash=%08x%08x%08x%08x%08x, "
"isDoomed=%d, priority=%d, closed=%d, invalid=%d, "
"pinning=%" PRIu32 ", fileExists=%d, fileSize=%" PRId64
", leafName=%s, key=%s]",
this, LOGSHA1(mHash), bool(mIsDoomed), bool(mPriority), bool(mClosed),
bool(mInvalid), static_cast<uint32_t>(mPinning), bool(mFileExists),
int64_t(mFileSize), leafName.get(), mKey.get()));
}
}
uint32_t CacheFileHandle::FileSizeInK() const {
MOZ_ASSERT(mFileSize != -1);
uint64_t size64 = mFileSize;
size64 += 0x3FF;
size64 >>= 10;
uint32_t size;
if (size64 >> 32) {
NS_WARNING(
"CacheFileHandle::FileSizeInK() - FileSize is too large, "
"truncating to PR_UINT32_MAX");
size = PR_UINT32_MAX;
} else {
size = static_cast<uint32_t>(size64);
}
return size;
}
bool CacheFileHandle::SetPinned(bool aPinned) {
LOG(("CacheFileHandle::SetPinned [this=%p, pinned=%d]", this, aPinned));
MOZ_ASSERT(CacheFileIOManager::IsOnIOThreadOrCeased());
mPinning = aPinned ? PinningStatus::PINNED : PinningStatus::NON_PINNED;
if ((MOZ_UNLIKELY(mDoomWhenFoundPinned) && aPinned) ||
(MOZ_UNLIKELY(mDoomWhenFoundNonPinned) && !aPinned)) {
LOG((" dooming, when: pinned=%d, non-pinned=%d, found: pinned=%d",
bool(mDoomWhenFoundPinned), bool(mDoomWhenFoundNonPinned), aPinned));
mDoomWhenFoundPinned = false;
mDoomWhenFoundNonPinned = false;
return false;
}
return true;
}
// Memory reporting
size_t CacheFileHandle::SizeOfExcludingThis(
mozilla::MallocSizeOf mallocSizeOf) const {
size_t n = 0;
nsCOMPtr<nsISizeOf> sizeOf;
sizeOf = do_QueryInterface(mFile);
if (sizeOf) {
n += sizeOf->SizeOfIncludingThis(mallocSizeOf);
}
n += mallocSizeOf(mFD);
n += mKey.SizeOfExcludingThisIfUnshared(mallocSizeOf);
return n;
}
size_t CacheFileHandle::SizeOfIncludingThis(
mozilla::MallocSizeOf mallocSizeOf) const {
return mallocSizeOf(this) + SizeOfExcludingThis(mallocSizeOf);
}
/******************************************************************************
* CacheFileHandles::HandleHashKey
*****************************************************************************/
void CacheFileHandles::HandleHashKey::AddHandle(CacheFileHandle* aHandle) {
MOZ_ASSERT(CacheFileIOManager::IsOnIOThreadOrCeased());
mHandles.InsertElementAt(0, aHandle);
}
void CacheFileHandles::HandleHashKey::RemoveHandle(CacheFileHandle* aHandle) {
MOZ_ASSERT(CacheFileIOManager::IsOnIOThreadOrCeased());
DebugOnly<bool> found{};
found = mHandles.RemoveElement(aHandle);
MOZ_ASSERT(found);
}
already_AddRefed<CacheFileHandle>
CacheFileHandles::HandleHashKey::GetNewestHandle() {
MOZ_ASSERT(CacheFileIOManager::IsOnIOThreadOrCeased());
RefPtr<CacheFileHandle> handle;
if (mHandles.Length()) {
handle = mHandles[0];
}
return handle.forget();
}
void CacheFileHandles::HandleHashKey::GetHandles(
nsTArray<RefPtr<CacheFileHandle>>& aResult) {
MOZ_ASSERT(CacheFileIOManager::IsOnIOThreadOrCeased());
for (uint32_t i = 0; i < mHandles.Length(); ++i) {
CacheFileHandle* handle = mHandles[i];
aResult.AppendElement(handle);
}
}
#ifdef DEBUG
void CacheFileHandles::HandleHashKey::AssertHandlesState() {
for (uint32_t i = 0; i < mHandles.Length(); ++i) {
CacheFileHandle* handle = mHandles[i];
MOZ_ASSERT(handle->IsDoomed());
}
}
#endif
size_t CacheFileHandles::HandleHashKey::SizeOfExcludingThis(
mozilla::MallocSizeOf mallocSizeOf) const {
MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
size_t n = 0;
n += mallocSizeOf(mHash.get());
for (uint32_t i = 0; i < mHandles.Length(); ++i) {
n += mHandles[i]->SizeOfIncludingThis(mallocSizeOf);
}
return n;
}
/******************************************************************************
* CacheFileHandles
*****************************************************************************/
CacheFileHandles::CacheFileHandles() {
LOG(("CacheFileHandles::CacheFileHandles() [this=%p]", this));
MOZ_COUNT_CTOR(CacheFileHandles);
}
CacheFileHandles::~CacheFileHandles() {
LOG(("CacheFileHandles::~CacheFileHandles() [this=%p]", this));
MOZ_COUNT_DTOR(CacheFileHandles);
}
nsresult CacheFileHandles::GetHandle(const SHA1Sum::Hash* aHash,
CacheFileHandle** _retval) {
MOZ_ASSERT(CacheFileIOManager::IsOnIOThreadOrCeased());
MOZ_ASSERT(aHash);
#ifdef DEBUG_HANDLES
LOG(("CacheFileHandles::GetHandle() [hash=%08x%08x%08x%08x%08x]",
LOGSHA1(aHash)));
#endif
// find hash entry for key
HandleHashKey* entry = mTable.GetEntry(*aHash);
if (!entry) {
LOG(
("CacheFileHandles::GetHandle() hash=%08x%08x%08x%08x%08x "
"no handle entries found",
LOGSHA1(aHash)));
return NS_ERROR_NOT_AVAILABLE;
}
#ifdef DEBUG_HANDLES
Log(entry);
#endif
// Check if the entry is doomed
RefPtr<CacheFileHandle> handle = entry->GetNewestHandle();
if (!handle) {
LOG(
("CacheFileHandles::GetHandle() hash=%08x%08x%08x%08x%08x "
"no handle found %p, entry %p",
LOGSHA1(aHash), handle.get(), entry));
return NS_ERROR_NOT_AVAILABLE;
}
if (handle->IsDoomed()) {
LOG(
("CacheFileHandles::GetHandle() hash=%08x%08x%08x%08x%08x "
"found doomed handle %p, entry %p",
LOGSHA1(aHash), handle.get(), entry));
return NS_ERROR_NOT_AVAILABLE;
}
LOG(
("CacheFileHandles::GetHandle() hash=%08x%08x%08x%08x%08x "
"found handle %p, entry %p",
LOGSHA1(aHash), handle.get(), entry));
handle.forget(_retval);
return NS_OK;
}
already_AddRefed<CacheFileHandle> CacheFileHandles::NewHandle(
const SHA1Sum::Hash* aHash, bool aPriority,
CacheFileHandle::PinningStatus aPinning) {
MOZ_ASSERT(CacheFileIOManager::IsOnIOThreadOrCeased());
MOZ_ASSERT(aHash);
#ifdef DEBUG_HANDLES
LOG(("CacheFileHandles::NewHandle() [hash=%08x%08x%08x%08x%08x]",
LOGSHA1(aHash)));
#endif
// find hash entry for key
HandleHashKey* entry = mTable.PutEntry(*aHash);
#ifdef DEBUG_HANDLES
Log(entry);
#endif
#ifdef DEBUG
entry->AssertHandlesState();
#endif
RefPtr<CacheFileHandle> handle =
new CacheFileHandle(entry->Hash(), aPriority, aPinning);
entry->AddHandle(handle);
LOG(
("CacheFileHandles::NewHandle() hash=%08x%08x%08x%08x%08x "
"created new handle %p, entry=%p",
LOGSHA1(aHash), handle.get(), entry));
return handle.forget();
}
void CacheFileHandles::RemoveHandle(CacheFileHandle* aHandle) {
MOZ_ASSERT(CacheFileIOManager::IsOnIOThreadOrCeased());
MOZ_ASSERT(aHandle);
if (!aHandle) {
return;
}
#ifdef DEBUG_HANDLES
LOG((
"CacheFileHandles::RemoveHandle() [handle=%p, hash=%08x%08x%08x%08x%08x]",
aHandle, LOGSHA1(aHandle->Hash())));
#endif
// find hash entry for key
HandleHashKey* entry = mTable.GetEntry(*aHandle->Hash());
if (!entry) {
MOZ_ASSERT(CacheFileIOManager::IsShutdown(),
"Should find entry when removing a handle before shutdown");
LOG(
("CacheFileHandles::RemoveHandle() hash=%08x%08x%08x%08x%08x "
"no entries found",
LOGSHA1(aHandle->Hash())));
return;
}
#ifdef DEBUG_HANDLES
Log(entry);
#endif
LOG(
("CacheFileHandles::RemoveHandle() hash=%08x%08x%08x%08x%08x "
"removing handle %p",
LOGSHA1(entry->Hash()), aHandle));
entry->RemoveHandle(aHandle);
if (entry->IsEmpty()) {
LOG(
("CacheFileHandles::RemoveHandle() hash=%08x%08x%08x%08x%08x "
"list is empty, removing entry %p",
LOGSHA1(entry->Hash()), entry));
mTable.RemoveEntry(entry);
}
}
void CacheFileHandles::GetAllHandles(
nsTArray<RefPtr<CacheFileHandle>>* _retval) {
MOZ_ASSERT(CacheFileIOManager::IsOnIOThreadOrCeased());
for (auto iter = mTable.Iter(); !iter.Done(); iter.Next()) {
iter.Get()->GetHandles(*_retval);
}
}
void CacheFileHandles::GetActiveHandles(
nsTArray<RefPtr<CacheFileHandle>>* _retval) {
MOZ_ASSERT(CacheFileIOManager::IsOnIOThreadOrCeased());
for (auto iter = mTable.Iter(); !iter.Done(); iter.Next()) {
RefPtr<CacheFileHandle> handle = iter.Get()->GetNewestHandle();
MOZ_ASSERT(handle);
if (!handle->IsDoomed()) {
_retval->AppendElement(handle);
}
}
}
void CacheFileHandles::ClearAll() {
MOZ_ASSERT(CacheFileIOManager::IsOnIOThreadOrCeased());
mTable.Clear();
}
uint32_t CacheFileHandles::HandleCount() { return mTable.Count(); }
#ifdef DEBUG_HANDLES
void CacheFileHandles::Log(CacheFileHandlesEntry* entry) {
LOG(("CacheFileHandles::Log() BEGIN [entry=%p]", entry));
nsTArray<RefPtr<CacheFileHandle>> array;
aEntry->GetHandles(array);
for (uint32_t i = 0; i < array.Length(); ++i) {
CacheFileHandle* handle = array[i];
handle->Log();
}
LOG(("CacheFileHandles::Log() END [entry=%p]", entry));
}
#endif
// Memory reporting
size_t CacheFileHandles::SizeOfExcludingThis(
mozilla::MallocSizeOf mallocSizeOf) const {
MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
return mTable.SizeOfExcludingThis(mallocSizeOf);
}
// Events
class ShutdownEvent : public Runnable {
public:
ShutdownEvent()
: Runnable("net::ShutdownEvent"), mMonitor("ShutdownEvent.mMonitor") {}
protected:
~ShutdownEvent() = default;
public:
NS_IMETHOD Run() override {
MonitorAutoLock mon(mMonitor);
CacheFileIOManager::gInstance->ShutdownInternal();
mNotified = true;
mon.Notify();
return NS_OK;
}
void PostAndWait() {
MonitorAutoLock mon(mMonitor);
nsresult rv = CacheFileIOManager::gInstance->mIOThread->Dispatch(
this,
CacheIOThread::WRITE); // When writes and closing of handles is done
MOZ_ASSERT(NS_SUCCEEDED(rv));
// If we failed to post the even there's no reason to go into the loop
// because mNotified will never be set to true.
if (NS_FAILED(rv)) {
NS_WARNING("Posting ShutdownEvent task failed");
return;
}
TimeDuration waitTime = TimeDuration::FromSeconds(1);
while (!mNotified) {
mon.Wait(waitTime);
if (!mNotified) {
// If there is any IO blocking on the IO thread, this will
// try to cancel it. Returns no later than after two seconds.
MonitorAutoUnlock unmon(mMonitor); // Prevent delays
CacheFileIOManager::gInstance->mIOThread->CancelBlockingIO();
}
}
}
protected:
mozilla::Monitor mMonitor MOZ_UNANNOTATED;
bool mNotified{false};
};
// Class responsible for reporting IO performance stats
class IOPerfReportEvent {
public:
explicit IOPerfReportEvent(CacheFileUtils::CachePerfStats::EDataType aType)
: mType(aType), mEventCounter(0) {}
void Start(CacheIOThread* aIOThread) {
mStartTime = TimeStamp::Now();
mEventCounter = aIOThread->EventCounter();
}
void Report(CacheIOThread* aIOThread) {
if (mStartTime.IsNull()) {
return;
}
// Single IO operations can take less than 1ms. So we use microseconds to
// keep a good resolution of data.
uint32_t duration = (TimeStamp::Now() - mStartTime).ToMicroseconds();
// This is a simple prefiltering of values that might differ a lot from the
// average value. Do not add the value to the filtered stats when the event
// had to wait in a long queue.
uint32_t eventCounter = aIOThread->EventCounter();
bool shortOnly = eventCounter - mEventCounter >= 5;
CacheFileUtils::CachePerfStats::AddValue(mType, duration, shortOnly);
}
protected:
CacheFileUtils::CachePerfStats::EDataType mType;
TimeStamp mStartTime;
uint32_t mEventCounter;
};
class OpenFileEvent : public Runnable, public IOPerfReportEvent {
public:
OpenFileEvent(const nsACString& aKey, uint32_t aFlags,
CacheFileIOListener* aCallback)
: Runnable("net::OpenFileEvent"),
IOPerfReportEvent(CacheFileUtils::CachePerfStats::IO_OPEN),
mFlags(aFlags),
mCallback(aCallback),
mKey(aKey) {
mIOMan = CacheFileIOManager::gInstance;
if (!(mFlags & CacheFileIOManager::SPECIAL_FILE)) {
Start(mIOMan->mIOThread);
}
}
protected:
~OpenFileEvent() = default;
public:
NS_IMETHOD Run() override {
nsresult rv = NS_OK;
if (!(mFlags & CacheFileIOManager::SPECIAL_FILE)) {
SHA1Sum sum;
sum.update(mKey.BeginReading(), mKey.Length());
sum.finish(mHash);
}
if (!mIOMan) {
rv = NS_ERROR_NOT_INITIALIZED;
} else {
if (mFlags & CacheFileIOManager::SPECIAL_FILE) {
rv = mIOMan->OpenSpecialFileInternal(mKey, mFlags,
getter_AddRefs(mHandle));
} else {
rv = mIOMan->OpenFileInternal(&mHash, mKey, mFlags,
getter_AddRefs(mHandle));
if (NS_SUCCEEDED(rv)) {
Report(mIOMan->mIOThread);
}
}
mIOMan = nullptr;
if (mHandle) {
if (mHandle->Key().IsEmpty()) {
mHandle->Key() = mKey;
}
}
}
mCallback->OnFileOpened(mHandle, rv);
return NS_OK;
}
protected:
SHA1Sum::Hash mHash{};
uint32_t mFlags;
nsCOMPtr<CacheFileIOListener> mCallback;
RefPtr<CacheFileIOManager> mIOMan;
RefPtr<CacheFileHandle> mHandle;
nsCString mKey;
};
class ReadEvent : public Runnable, public IOPerfReportEvent {
public:
ReadEvent(CacheFileHandle* aHandle, int64_t aOffset, char* aBuf,
int32_t aCount, CacheFileIOListener* aCallback)
: Runnable("net::ReadEvent"),
IOPerfReportEvent(CacheFileUtils::CachePerfStats::IO_READ),
mHandle(aHandle),
mOffset(aOffset),
mBuf(aBuf),
mCount(aCount),
mCallback(aCallback) {
if (!mHandle->IsSpecialFile()) {
Start(CacheFileIOManager::gInstance->mIOThread);
}
}
protected:
~ReadEvent() = default;
public:
NS_IMETHOD Run() override {
nsresult rv;
if (mHandle->IsClosed() || (mCallback && mCallback->IsKilled())) {
rv = NS_ERROR_NOT_INITIALIZED;
} else {
rv = CacheFileIOManager::gInstance->ReadInternal(mHandle, mOffset, mBuf,
mCount);
if (NS_SUCCEEDED(rv)) {
Report(CacheFileIOManager::gInstance->mIOThread);
}
}
mCallback->OnDataRead(mHandle, mBuf, rv);
return NS_OK;
}
protected:
RefPtr<CacheFileHandle> mHandle;
int64_t mOffset;
char* mBuf;
int32_t mCount;
nsCOMPtr<CacheFileIOListener> mCallback;
};
class WriteEvent : public Runnable, public IOPerfReportEvent {
public:
WriteEvent(CacheFileHandle* aHandle, int64_t aOffset, const char* aBuf,
int32_t aCount, bool aValidate, bool aTruncate,
CacheFileIOListener* aCallback)
: Runnable("net::WriteEvent"),
IOPerfReportEvent(CacheFileUtils::CachePerfStats::IO_WRITE),
mHandle(aHandle),
mOffset(aOffset),
mBuf(aBuf),
mCount(aCount),
mValidate(aValidate),
mTruncate(aTruncate),
mCallback(aCallback) {
if (!mHandle->IsSpecialFile()) {
Start(CacheFileIOManager::gInstance->mIOThread);
}
}
protected:
~WriteEvent() {
if (!mCallback && mBuf) {
free(const_cast<char*>(mBuf));
}
}
public:
NS_IMETHOD Run() override {
nsresult rv;
if (mHandle->IsClosed() || (mCallback && mCallback->IsKilled())) {
// We usually get here only after the internal shutdown
// (i.e. mShuttingDown == true). Pretend write has succeeded
// to avoid any past-shutdown file dooming.
rv = (CacheObserver::IsPastShutdownIOLag() ||
CacheFileIOManager::gInstance->mShuttingDown)
? NS_OK
: NS_ERROR_NOT_INITIALIZED;
} else {
rv = CacheFileIOManager::gInstance->WriteInternal(
mHandle, mOffset, mBuf, mCount, mValidate, mTruncate);
if (NS_SUCCEEDED(rv)) {
Report(CacheFileIOManager::gInstance->mIOThread);
}
if (NS_FAILED(rv) && !mCallback) {
// No listener is going to handle the error, doom the file
CacheFileIOManager::gInstance->DoomFileInternal(mHandle);
}
}
if (mCallback) {
mCallback->OnDataWritten(mHandle, mBuf, rv);
} else {
free(const_cast<char*>(mBuf));
mBuf = nullptr;
}
return NS_OK;
}
protected:
RefPtr<CacheFileHandle> mHandle;
int64_t mOffset;
const char* mBuf;
int32_t mCount;
bool mValidate : 1;
bool mTruncate : 1;
nsCOMPtr<CacheFileIOListener> mCallback;
};
class DoomFileEvent : public Runnable {
public:
DoomFileEvent(CacheFileHandle* aHandle, CacheFileIOListener* aCallback)
: Runnable("net::DoomFileEvent"),
mCallback(aCallback),
mHandle(aHandle) {}
protected:
~DoomFileEvent() = default;
public:
NS_IMETHOD Run() override {
nsresult rv;
if (mHandle->IsClosed()) {
rv = NS_ERROR_NOT_INITIALIZED;
} else {
rv = CacheFileIOManager::gInstance->DoomFileInternal(mHandle);
}
if (mCallback) {
mCallback->OnFileDoomed(mHandle, rv);
}
return NS_OK;
}
protected:
nsCOMPtr<CacheFileIOListener> mCallback;
nsCOMPtr<nsIEventTarget> mTarget;
RefPtr<CacheFileHandle> mHandle;
};
class DoomFileByKeyEvent : public Runnable {
public:
DoomFileByKeyEvent(const nsACString& aKey, CacheFileIOListener* aCallback)
: Runnable("net::DoomFileByKeyEvent"), mCallback(aCallback) {
SHA1Sum sum;
sum.update(aKey.BeginReading(), aKey.Length());
sum.finish(mHash);
mIOMan = CacheFileIOManager::gInstance;
}
protected:
~DoomFileByKeyEvent() = default;
public:
NS_IMETHOD Run() override {
nsresult rv;
if (!mIOMan) {
rv = NS_ERROR_NOT_INITIALIZED;
} else {
rv = mIOMan->DoomFileByKeyInternal(&mHash);
mIOMan = nullptr;
}
if (mCallback) {
mCallback->OnFileDoomed(nullptr, rv);
}
return NS_OK;
}
protected:
SHA1Sum::Hash mHash{};
nsCOMPtr<CacheFileIOListener> mCallback;
RefPtr<CacheFileIOManager> mIOMan;
};
class ReleaseNSPRHandleEvent : public Runnable {
public:
explicit ReleaseNSPRHandleEvent(CacheFileHandle* aHandle)
: Runnable("net::ReleaseNSPRHandleEvent"), mHandle(aHandle) {}
protected:
~ReleaseNSPRHandleEvent() = default;
public:
NS_IMETHOD Run() override {
if (!mHandle->IsClosed()) {
CacheFileIOManager::gInstance->MaybeReleaseNSPRHandleInternal(mHandle);
}
return NS_OK;
}
protected:
RefPtr<CacheFileHandle> mHandle;
};
class TruncateSeekSetEOFEvent : public Runnable {
public:
TruncateSeekSetEOFEvent(CacheFileHandle* aHandle, int64_t aTruncatePos,
int64_t aEOFPos, CacheFileIOListener* aCallback)
: Runnable("net::TruncateSeekSetEOFEvent"),
mHandle(aHandle),
mTruncatePos(aTruncatePos),
mEOFPos(aEOFPos),
mCallback(aCallback) {}
protected:
~TruncateSeekSetEOFEvent() = default;
public:
NS_IMETHOD Run() override {
nsresult rv;
if (mHandle->IsClosed() || (mCallback && mCallback->IsKilled())) {
rv = NS_ERROR_NOT_INITIALIZED;
} else {
rv = CacheFileIOManager::gInstance->TruncateSeekSetEOFInternal(
mHandle, mTruncatePos, mEOFPos);
}
if (mCallback) {
mCallback->OnEOFSet(mHandle, rv);
}
return NS_OK;
}
protected:
RefPtr<CacheFileHandle> mHandle;
int64_t mTruncatePos;
int64_t mEOFPos;
nsCOMPtr<CacheFileIOListener> mCallback;
};
class RenameFileEvent : public Runnable {
public:
RenameFileEvent(CacheFileHandle* aHandle, const nsACString& aNewName,
CacheFileIOListener* aCallback)
: Runnable("net::RenameFileEvent"),
mHandle(aHandle),
mNewName(aNewName),
mCallback(aCallback) {}
protected:
~RenameFileEvent() = default;
public:
NS_IMETHOD Run() override {
nsresult rv;
if (mHandle->IsClosed()) {
rv = NS_ERROR_NOT_INITIALIZED;
} else {
rv = CacheFileIOManager::gInstance->RenameFileInternal(mHandle, mNewName);
}
if (mCallback) {
mCallback->OnFileRenamed(mHandle, rv);
}
return NS_OK;
}
protected:
RefPtr<CacheFileHandle> mHandle;
nsCString mNewName;
nsCOMPtr<CacheFileIOListener> mCallback;
};
class InitIndexEntryEvent : public Runnable {
public:
InitIndexEntryEvent(CacheFileHandle* aHandle,
OriginAttrsHash aOriginAttrsHash, bool aAnonymous,
bool aPinning)
: Runnable("net::InitIndexEntryEvent"),
mHandle(aHandle),
mOriginAttrsHash(aOriginAttrsHash),
mAnonymous(aAnonymous),
mPinning(aPinning) {}
protected:
~InitIndexEntryEvent() = default;
public:
NS_IMETHOD Run() override {
if (mHandle->IsClosed() || mHandle->IsDoomed()) {
return NS_OK;
}
CacheIndex::InitEntry(mHandle->Hash(), mOriginAttrsHash, mAnonymous,
mPinning);
// We cannot set the filesize before we init the entry. If we're opening
// an existing entry file, frecency will be set after parsing the entry
// file, but we must set the filesize here since nobody is going to set it
// if there is no write to the file.
uint32_t sizeInK = mHandle->FileSizeInK();
CacheIndex::UpdateEntry(mHandle->Hash(), nullptr, nullptr, nullptr, nullptr,
nullptr, &sizeInK);
return NS_OK;
}
protected:
RefPtr<CacheFileHandle> mHandle;
OriginAttrsHash mOriginAttrsHash;
bool mAnonymous;
bool mPinning;
};
class UpdateIndexEntryEvent : public Runnable {
public:
UpdateIndexEntryEvent(CacheFileHandle* aHandle, const uint32_t* aFrecency,
const bool* aHasAltData, const uint16_t* aOnStartTime,
const uint16_t* aOnStopTime,
const uint8_t* aContentType)
: Runnable("net::UpdateIndexEntryEvent"),
mHandle(aHandle),
mHasFrecency(false),
mHasHasAltData(false),
mHasOnStartTime(false),
mHasOnStopTime(false),
mHasContentType(false),
mFrecency(0),
mHasAltData(false),
mOnStartTime(0),
mOnStopTime(0),
mContentType(nsICacheEntry::CONTENT_TYPE_UNKNOWN) {
if (aFrecency) {
mHasFrecency = true;
mFrecency = *aFrecency;
}
if (aHasAltData) {
mHasHasAltData = true;
mHasAltData = *aHasAltData;
}
if (aOnStartTime) {
mHasOnStartTime = true;
mOnStartTime = *aOnStartTime;
}
if (aOnStopTime) {
mHasOnStopTime = true;
mOnStopTime = *aOnStopTime;
}
if (aContentType) {
mHasContentType = true;
mContentType = *aContentType;
}
}
protected:
~UpdateIndexEntryEvent() = default;
public:
NS_IMETHOD Run() override {
if (mHandle->IsClosed() || mHandle->IsDoomed()) {
return NS_OK;
}
CacheIndex::UpdateEntry(mHandle->Hash(),
mHasFrecency ? &mFrecency : nullptr,
mHasHasAltData ? &mHasAltData : nullptr,
mHasOnStartTime ? &mOnStartTime : nullptr,
mHasOnStopTime ? &mOnStopTime : nullptr,
mHasContentType ? &mContentType : nullptr, nullptr);
return NS_OK;
}
protected:
RefPtr<CacheFileHandle> mHandle;
bool mHasFrecency;
bool mHasHasAltData;
bool mHasOnStartTime;
bool mHasOnStopTime;
bool mHasContentType;
uint32_t mFrecency;
bool mHasAltData;
uint16_t mOnStartTime;
uint16_t mOnStopTime;
uint8_t mContentType;
};
class MetadataWriteScheduleEvent : public Runnable {
public:
enum EMode { SCHEDULE, UNSCHEDULE, SHUTDOWN } mMode;
RefPtr<CacheFile> mFile;
RefPtr<CacheFileIOManager> mIOMan;
MetadataWriteScheduleEvent(CacheFileIOManager* aManager, CacheFile* aFile,
EMode aMode)
: Runnable("net::MetadataWriteScheduleEvent"),
mMode(aMode),
mFile(aFile),
mIOMan(aManager) {}
virtual ~MetadataWriteScheduleEvent() = default;
NS_IMETHOD Run() override {
RefPtr<CacheFileIOManager> ioMan = CacheFileIOManager::gInstance;
if (!ioMan) {
NS_WARNING(
"CacheFileIOManager already gone in "
"MetadataWriteScheduleEvent::Run()");
return NS_OK;
}
switch (mMode) {
case SCHEDULE:
ioMan->ScheduleMetadataWriteInternal(mFile);
break;
case UNSCHEDULE:
ioMan->UnscheduleMetadataWriteInternal(mFile);
break;
case SHUTDOWN:
ioMan->ShutdownMetadataWriteSchedulingInternal();
break;
}
return NS_OK;
}
};
StaticRefPtr<CacheFileIOManager> CacheFileIOManager::gInstance;
NS_IMPL_ISUPPORTS(CacheFileIOManager, nsITimerCallback, nsINamed)
CacheFileIOManager::CacheFileIOManager()
{
LOG(("CacheFileIOManager::CacheFileIOManager [this=%p]", this));
MOZ_ASSERT(!gInstance, "multiple CacheFileIOManager instances!");
}
CacheFileIOManager::~CacheFileIOManager() {
LOG(("CacheFileIOManager::~CacheFileIOManager [this=%p]", this));
}
// static
nsresult CacheFileIOManager::Init() {
LOG(("CacheFileIOManager::Init()"));
MOZ_ASSERT(NS_IsMainThread());
if (gInstance) {
return NS_ERROR_ALREADY_INITIALIZED;
}
RefPtr<CacheFileIOManager> ioMan = new CacheFileIOManager();
nsresult rv = ioMan->InitInternal();
NS_ENSURE_SUCCESS(rv, rv);
gInstance = std::move(ioMan);
return NS_OK;
}
nsresult CacheFileIOManager::InitInternal() {
nsresult rv;
mIOThread = new CacheIOThread();
rv = mIOThread->Init();
MOZ_ASSERT(NS_SUCCEEDED(rv), "Can't create background thread");
NS_ENSURE_SUCCESS(rv, rv);
mStartTime = TimeStamp::NowLoRes();
return NS_OK;
}
// static
nsresult CacheFileIOManager::Shutdown() {
LOG(("CacheFileIOManager::Shutdown() [gInstance=%p]", gInstance.get()));
MOZ_ASSERT(NS_IsMainThread());
if (!gInstance) {
return NS_ERROR_NOT_INITIALIZED;
}
Telemetry::AutoTimer<Telemetry::NETWORK_DISK_CACHE_SHUTDOWN_V2> shutdownTimer;
CacheIndex::PreShutdown();
ShutdownMetadataWriteScheduling();
RefPtr<ShutdownEvent> ev = new ShutdownEvent();
ev->PostAndWait();
MOZ_ASSERT(gInstance->mHandles.HandleCount() == 0);
MOZ_ASSERT(gInstance->mHandlesByLastUsed.Length() == 0);
if (gInstance->mIOThread) {
gInstance->mIOThread->Shutdown();
}
CacheIndex::Shutdown();
if (CacheObserver::ClearCacheOnShutdown()) {
Telemetry::AutoTimer<Telemetry::NETWORK_DISK_CACHE2_SHUTDOWN_CLEAR_PRIVATE>
totalTimer;
gInstance->SyncRemoveAllCacheFiles();
}
gInstance = nullptr;
return NS_OK;
}
void CacheFileIOManager::ShutdownInternal() {
LOG(("CacheFileIOManager::ShutdownInternal() [this=%p]", this));
MOZ_ASSERT(mIOThread->IsCurrentThread());
// No new handles can be created after this flag is set
mShuttingDown = true;
if (mTrashTimer) {
mTrashTimer->Cancel();
mTrashTimer = nullptr;
}
// close all handles and delete all associated files
nsTArray<RefPtr<CacheFileHandle>> handles;
mHandles.GetAllHandles(&handles);
handles.AppendElements(mSpecialHandles);
for (uint32_t i = 0; i < handles.Length(); i++) {
CacheFileHandle* h = handles[i];
h->mClosed = true;
h->Log();
// Close completely written files.
MaybeReleaseNSPRHandleInternal(h);
// Don't bother removing invalid and/or doomed files to improve
// shutdown perfomrance.
// Doomed files are already in the doomed directory from which
// we never reuse files and delete the dir on next session startup.
// Invalid files don't have metadata and thus won't load anyway
// (hashes won't match).
if (!h->IsSpecialFile() && !h->mIsDoomed && !h->mFileExists) {
CacheIndex::RemoveEntry(h->Hash());
}
// Remove the handle from mHandles/mSpecialHandles
if (h->IsSpecialFile()) {
mSpecialHandles.RemoveElement(h);
} else {
mHandles.RemoveHandle(h);
}
// Pointer to the hash is no longer valid once the last handle with the
// given hash is released. Null out the pointer so that we crash if there
// is a bug in this code and we dereference the pointer after this point.
if (!h->IsSpecialFile()) {
h->mHash = nullptr;
}
}
// Assert the table is empty. When we are here, no new handles can be added
// and handles will no longer remove them self from this table and we don't
// want to keep invalid handles here. Also, there is no lookup after this
// point to happen.
MOZ_ASSERT(mHandles.HandleCount() == 0);
// Release trash directory enumerator
if (mTrashDirEnumerator) {
mTrashDirEnumerator->Close();
mTrashDirEnumerator = nullptr;
}
if (mContextEvictor) {
mContextEvictor->Shutdown();
mContextEvictor = nullptr;
}
}
// static
nsresult CacheFileIOManager::OnProfile() {
LOG(("CacheFileIOManager::OnProfile() [gInstance=%p]", gInstance.get()));
RefPtr<CacheFileIOManager> ioMan = gInstance;
if (!ioMan) {
// CacheFileIOManager::Init() failed, probably could not create the IO
// thread, just go with it...
return NS_ERROR_NOT_INITIALIZED;
}
nsresult rv;
nsCOMPtr<nsIFile> directory;
CacheObserver::ParentDirOverride(getter_AddRefs(directory));
#if defined(MOZ_WIDGET_ANDROID)
nsCOMPtr<nsIFile> profilelessDirectory;
char* cachePath = getenv("CACHE_DIRECTORY");
if (!directory && cachePath && *cachePath) {
rv = NS_NewNativeLocalFile(nsDependentCString(cachePath), true,
getter_AddRefs(directory));
if (NS_SUCCEEDED(rv)) {
// Save this directory as the profileless path.
rv = directory->Clone(getter_AddRefs(profilelessDirectory));
NS_ENSURE_SUCCESS(rv, rv);
// Add profile leaf name to the directory name to distinguish
// multiple profiles Fennec supports.
nsCOMPtr<nsIFile> profD;
rv = NS_GetSpecialDirectory(NS_APP_USER_PROFILE_50_DIR,
getter_AddRefs(profD));
nsAutoCString leafName;
if (NS_SUCCEEDED(rv)) {
rv = profD->GetNativeLeafName(leafName);
}
if (NS_SUCCEEDED(rv)) {
rv = directory->AppendNative(leafName);
}
if (NS_FAILED(rv)) {
directory = nullptr;
}
}
}
#endif
if (!directory) {
rv = NS_GetSpecialDirectory(NS_APP_CACHE_PARENT_DIR,
getter_AddRefs(directory));
}
if (!directory) {
rv = NS_GetSpecialDirectory(NS_APP_USER_PROFILE_LOCAL_50_DIR,
getter_AddRefs(directory));
}
if (directory) {
rv = directory->Append(u"cache2"_ns);
NS_ENSURE_SUCCESS(rv, rv);
}
// All functions return a clone.
ioMan->mCacheDirectory.swap(directory);
#if defined(MOZ_WIDGET_ANDROID)
if (profilelessDirectory) {
rv = profilelessDirectory->Append(u"cache2"_ns);
NS_ENSURE_SUCCESS(rv, rv);
}
ioMan->mCacheProfilelessDirectory.swap(profilelessDirectory);
#endif
if (ioMan->mCacheDirectory) {
CacheIndex::Init(ioMan->mCacheDirectory);
}
return NS_OK;
}
// static
nsresult CacheFileIOManager::OnDelayedStartupFinished() {
if (!StaticPrefs::network_cache_shutdown_purge_in_background_task()) {
return NS_OK;
}
RefPtr<CacheFileIOManager> ioMan = gInstance;
nsCOMPtr<nsIEventTarget> target = IOTarget();
if (NS_WARN_IF(!ioMan || !target)) {
return NS_ERROR_NOT_AVAILABLE;
}
return target->Dispatch(
NS_NewRunnableFunction("CacheFileIOManager::OnDelayedStartupFinished",
[ioMan = RefPtr{ioMan}] {
// TODO: Check if there are any old cache dirs.
// Report telemetry.
gInstance->DispatchPurgeTask(""_ns, "0"_ns,
kPurgeExtension);
}),
nsIEventTarget::DISPATCH_NORMAL);
}
// static
already_AddRefed<nsIEventTarget> CacheFileIOManager::IOTarget() {
nsCOMPtr<nsIEventTarget> target;
if (gInstance && gInstance->mIOThread) {
target = gInstance->mIOThread->Target();
}
return target.forget();
}
// static
already_AddRefed<CacheIOThread> CacheFileIOManager::IOThread() {
RefPtr<CacheIOThread> thread;
if (gInstance) {
thread = gInstance->mIOThread;
}
return thread.forget();
}
// static
bool CacheFileIOManager::IsOnIOThread() {
RefPtr<CacheFileIOManager> ioMan = gInstance;
if (ioMan && ioMan->mIOThread) {
return ioMan->mIOThread->IsCurrentThread();
}
return false;
}
// static
bool CacheFileIOManager::IsOnIOThreadOrCeased() {
RefPtr<CacheFileIOManager> ioMan = gInstance;
if (ioMan && ioMan->mIOThread) {
return ioMan->mIOThread->IsCurrentThread();
}
// Ceased...
return true;
}
// static
bool CacheFileIOManager::IsShutdown() {
if (!gInstance) {
return true;
}
return gInstance->mShuttingDown;
}
// static
nsresult CacheFileIOManager::ScheduleMetadataWrite(CacheFile* aFile) {
RefPtr<CacheFileIOManager> ioMan = gInstance;
NS_ENSURE_TRUE(ioMan, NS_ERROR_NOT_INITIALIZED);
NS_ENSURE_TRUE(!ioMan->mShuttingDown, NS_ERROR_NOT_INITIALIZED);
RefPtr<MetadataWriteScheduleEvent> event = new MetadataWriteScheduleEvent(
ioMan, aFile, MetadataWriteScheduleEvent::SCHEDULE);
nsCOMPtr<nsIEventTarget> target = ioMan->IOTarget();
NS_ENSURE_TRUE(target, NS_ERROR_UNEXPECTED);
return target->Dispatch(event, nsIEventTarget::DISPATCH_NORMAL);
}
nsresult CacheFileIOManager::ScheduleMetadataWriteInternal(CacheFile* aFile) {
MOZ_ASSERT(IsOnIOThreadOrCeased());
nsresult rv;
if (!mMetadataWritesTimer) {
rv = NS_NewTimerWithCallback(getter_AddRefs(mMetadataWritesTimer), this,
kMetadataWriteDelay, nsITimer::TYPE_ONE_SHOT);
NS_ENSURE_SUCCESS(rv, rv);
}
if (mScheduledMetadataWrites.IndexOf(aFile) !=
nsTArray<RefPtr<mozilla::net::CacheFile>>::NoIndex) {
return NS_OK;
}
mScheduledMetadataWrites.AppendElement(aFile);
return NS_OK;
}
// static
nsresult CacheFileIOManager::UnscheduleMetadataWrite(CacheFile* aFile) {
RefPtr<CacheFileIOManager> ioMan = gInstance;
NS_ENSURE_TRUE(ioMan, NS_ERROR_NOT_INITIALIZED);
NS_ENSURE_TRUE(!ioMan->mShuttingDown, NS_ERROR_NOT_INITIALIZED);
RefPtr<MetadataWriteScheduleEvent> event = new MetadataWriteScheduleEvent(
ioMan, aFile, MetadataWriteScheduleEvent::UNSCHEDULE);
nsCOMPtr<nsIEventTarget> target = ioMan->IOTarget();
NS_ENSURE_TRUE(target, NS_ERROR_UNEXPECTED);
return target->Dispatch(event, nsIEventTarget::DISPATCH_NORMAL);
}
void CacheFileIOManager::UnscheduleMetadataWriteInternal(CacheFile* aFile) {
MOZ_ASSERT(IsOnIOThreadOrCeased());
mScheduledMetadataWrites.RemoveElement(aFile);
if (mScheduledMetadataWrites.Length() == 0 && mMetadataWritesTimer) {
mMetadataWritesTimer->Cancel();
mMetadataWritesTimer = nullptr;
}
}
// static
nsresult CacheFileIOManager::ShutdownMetadataWriteScheduling() {
RefPtr<CacheFileIOManager> ioMan = gInstance;
NS_ENSURE_TRUE(ioMan, NS_ERROR_NOT_INITIALIZED);
RefPtr<MetadataWriteScheduleEvent> event = new MetadataWriteScheduleEvent(
ioMan, nullptr, MetadataWriteScheduleEvent::SHUTDOWN);
nsCOMPtr<nsIEventTarget> target = ioMan->IOTarget();
NS_ENSURE_TRUE(target, NS_ERROR_UNEXPECTED);
return target->Dispatch(event, nsIEventTarget::DISPATCH_NORMAL);
}
void CacheFileIOManager::ShutdownMetadataWriteSchedulingInternal() {
MOZ_ASSERT(IsOnIOThreadOrCeased());
nsTArray<RefPtr<CacheFile>> files = std::move(mScheduledMetadataWrites);
for (uint32_t i = 0; i < files.Length(); ++i) {
CacheFile* file = files[i];
file->WriteMetadataIfNeeded();
}
if (mMetadataWritesTimer) {
mMetadataWritesTimer->Cancel();
mMetadataWritesTimer = nullptr;
}
}
NS_IMETHODIMP
CacheFileIOManager::Notify(nsITimer* aTimer) {
MOZ_ASSERT(IsOnIOThreadOrCeased());
MOZ_ASSERT(mMetadataWritesTimer == aTimer);
mMetadataWritesTimer = nullptr;
nsTArray<RefPtr<CacheFile>> files = std::move(mScheduledMetadataWrites);
for (uint32_t i = 0; i < files.Length(); ++i) {
CacheFile* file = files[i];
file->WriteMetadataIfNeeded();
}
return NS_OK;
}
NS_IMETHODIMP
CacheFileIOManager::GetName(nsACString& aName) {
aName.AssignLiteral("CacheFileIOManager");
return NS_OK;
}
// static
nsresult CacheFileIOManager::OpenFile(const nsACString& aKey, uint32_t aFlags,
CacheFileIOListener* aCallback) {
LOG(("CacheFileIOManager::OpenFile() [key=%s, flags=%d, listener=%p]",
PromiseFlatCString(aKey).get(), aFlags, aCallback));
nsresult rv;
RefPtr<CacheFileIOManager> ioMan = gInstance;
if (!ioMan) {
return NS_ERROR_NOT_INITIALIZED;
}
bool priority = aFlags & CacheFileIOManager::PRIORITY;
RefPtr<OpenFileEvent> ev = new OpenFileEvent(aKey, aFlags, aCallback);
rv = ioMan->mIOThread->Dispatch(
ev, priority ? CacheIOThread::OPEN_PRIORITY : CacheIOThread::OPEN);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult CacheFileIOManager::OpenFileInternal(const SHA1Sum::Hash* aHash,
const nsACString& aKey,
uint32_t aFlags,
CacheFileHandle** _retval) {
LOG(
("CacheFileIOManager::OpenFileInternal() [hash=%08x%08x%08x%08x%08x, "
"key=%s, flags=%d]",
LOGSHA1(aHash), PromiseFlatCString(aKey).get(), aFlags));
MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
nsresult rv;
if (mShuttingDown) {
return NS_ERROR_NOT_INITIALIZED;
}
CacheIOThread::Cancelable cancelable(
true /* never called for special handles */);
if (!mTreeCreated) {
rv = CreateCacheTree();
if (NS_FAILED(rv)) return rv;
}
CacheFileHandle::PinningStatus pinning =
aFlags & PINNED ? CacheFileHandle::PinningStatus::PINNED
: CacheFileHandle::PinningStatus::NON_PINNED;
nsCOMPtr<nsIFile> file;
rv = GetFile(aHash, getter_AddRefs(file));
NS_ENSURE_SUCCESS(rv, rv);
RefPtr<CacheFileHandle> handle;
mHandles.GetHandle(aHash, getter_AddRefs(handle));
if ((aFlags & (OPEN | CREATE | CREATE_NEW)) == CREATE_NEW) {
if (handle) {
rv = DoomFileInternal(handle);
NS_ENSURE_SUCCESS(rv, rv);
handle = nullptr;
}
handle = mHandles.NewHandle(aHash, aFlags & PRIORITY, pinning);
bool exists;
rv = file->Exists(&exists);
NS_ENSURE_SUCCESS(rv, rv);
if (exists) {
CacheIndex::RemoveEntry(aHash);
LOG(
("CacheFileIOManager::OpenFileInternal() - Removing old file from "
"disk"));
rv = file->Remove(false);
if (NS_FAILED(rv)) {
NS_WARNING("Cannot remove old entry from the disk");
LOG(
("CacheFileIOManager::OpenFileInternal() - Removing old file failed"
". [rv=0x%08" PRIx32 "]",
static_cast<uint32_t>(rv)));
}
}
CacheIndex::AddEntry(aHash);
handle->mFile.swap(file);
handle->mFileSize = 0;
}
if (handle) {
handle.swap(*_retval);
return NS_OK;
}
bool exists, evictedAsPinned = false, evictedAsNonPinned = false;
rv = file->Exists(&exists);
NS_ENSURE_SUCCESS(rv, rv);
if (exists && mContextEvictor) {
if (mContextEvictor->ContextsCount() == 0) {
mContextEvictor = nullptr;
} else {
mContextEvictor->WasEvicted(aKey, file, &evictedAsPinned,
&evictedAsNonPinned);
}
}
if (!exists && (aFlags & (OPEN | CREATE | CREATE_NEW)) == OPEN) {
return NS_ERROR_NOT_AVAILABLE;
}
if (exists) {
// For existing files we determine the pinning status later, after the
// metadata gets parsed.
pinning = CacheFileHandle::PinningStatus::UNKNOWN;
}
handle = mHandles.NewHandle(aHash, aFlags & PRIORITY, pinning);
if (exists) {
// If this file has been found evicted through the context file evictor
// above for any of pinned or non-pinned state, these calls ensure we doom
// the handle ASAP we know the real pinning state after metadta has been
// parsed. DoomFileInternal on the |handle| doesn't doom right now, since
// the pinning state is unknown and we pass down a pinning restriction.
if (evictedAsPinned) {
rv = DoomFileInternal(handle, DOOM_WHEN_PINNED);
MOZ_ASSERT(!handle->IsDoomed() && NS_SUCCEEDED(rv));
}
if (evictedAsNonPinned) {
rv = DoomFileInternal(handle, DOOM_WHEN_NON_PINNED);
MOZ_ASSERT(!handle->IsDoomed() && NS_SUCCEEDED(rv));
}
int64_t fileSize = -1;
rv = file->GetFileSize(&fileSize);
NS_ENSURE_SUCCESS(rv, rv);
handle->mFileSize = fileSize;
handle->mFileExists = true;
CacheIndex::EnsureEntryExists(aHash);
} else {
handle->mFileSize = 0;
CacheIndex::AddEntry(aHash);
}
handle->mFile.swap(file);
handle.swap(*_retval);
return NS_OK;
}
nsresult CacheFileIOManager::OpenSpecialFileInternal(
const nsACString& aKey, uint32_t aFlags, CacheFileHandle** _retval) {
LOG(("CacheFileIOManager::OpenSpecialFileInternal() [key=%s, flags=%d]",
PromiseFlatCString(aKey).get(), aFlags));
MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
nsresult rv;
if (mShuttingDown) {
return NS_ERROR_NOT_INITIALIZED;
}
if (!mTreeCreated) {
rv = CreateCacheTree();
if (NS_FAILED(rv)) return rv;
}
nsCOMPtr<nsIFile> file;
rv = GetSpecialFile(aKey, getter_AddRefs(file));
NS_ENSURE_SUCCESS(rv, rv);
RefPtr<CacheFileHandle> handle;
for (uint32_t i = 0; i < mSpecialHandles.Length(); i++) {
if (!mSpecialHandles[i]->IsDoomed() && mSpecialHandles[i]->Key() == aKey) {
handle = mSpecialHandles[i];
break;
}
}
if ((aFlags & (OPEN | CREATE | CREATE_NEW)) == CREATE_NEW) {
if (handle) {
rv = DoomFileInternal(handle);
NS_ENSURE_SUCCESS(rv, rv);
handle = nullptr;
}
handle = new CacheFileHandle(aKey, aFlags & PRIORITY,
CacheFileHandle::PinningStatus::NON_PINNED);
mSpecialHandles.AppendElement(handle);
bool exists;
rv = file->Exists(&exists);
NS_ENSURE_SUCCESS(rv, rv);
if (exists) {
LOG(
("CacheFileIOManager::OpenSpecialFileInternal() - Removing file from "
"disk"));
rv = file->Remove(false);
if (NS_FAILED(rv)) {
NS_WARNING("Cannot remove old entry from the disk");
LOG(
("CacheFileIOManager::OpenSpecialFileInternal() - Removing file "
"failed. [rv=0x%08" PRIx32 "]",
static_cast<uint32_t>(rv)));
}
}
handle->mFile.swap(file);
handle->mFileSize = 0;
}
if (handle) {
handle.swap(*_retval);
return NS_OK;
}
bool exists;
rv = file->Exists(&exists);
NS_ENSURE_SUCCESS(rv, rv);
if (!exists && (aFlags & (OPEN | CREATE | CREATE_NEW)) == OPEN) {
return NS_ERROR_NOT_AVAILABLE;
}
handle = new CacheFileHandle(aKey, aFlags & PRIORITY,
CacheFileHandle::PinningStatus::NON_PINNED);
mSpecialHandles.AppendElement(handle);
if (exists) {
int64_t fileSize = -1;
rv = file->GetFileSize(&fileSize);
NS_ENSURE_SUCCESS(rv, rv);
handle->mFileSize = fileSize;
handle->mFileExists = true;
} else {
handle->mFileSize = 0;
}
handle->mFile.swap(file);
handle.swap(*_retval);
return NS_OK;
}
void CacheFileIOManager::CloseHandleInternal(CacheFileHandle* aHandle) {
nsresult rv;
LOG(("CacheFileIOManager::CloseHandleInternal() [handle=%p]", aHandle));
MOZ_ASSERT(!aHandle->IsClosed());
aHandle->Log();
MOZ_ASSERT(CacheFileIOManager::IsOnIOThreadOrCeased());
CacheIOThread::Cancelable cancelable(!aHandle->IsSpecialFile());
// Maybe close file handle (can be legally bypassed after shutdown)
rv = MaybeReleaseNSPRHandleInternal(aHandle);
// Delete the file if the entry was doomed or invalid and
// filedesc properly closed
if ((aHandle->mIsDoomed || aHandle->mInvalid) && aHandle->mFileExists &&
NS_SUCCEEDED(rv)) {
LOG(
("CacheFileIOManager::CloseHandleInternal() - Removing file from "
"disk"));
rv = aHandle->mFile->Remove(false);
if (NS_SUCCEEDED(rv)) {
aHandle->mFileExists = false;
} else {
LOG((" failed to remove the file [rv=0x%08" PRIx32 "]",
static_cast<uint32_t>(rv)));
}
}
if (!aHandle->IsSpecialFile() && !aHandle->mIsDoomed &&
(aHandle->mInvalid || !aHandle->mFileExists)) {
CacheIndex::RemoveEntry(aHandle->Hash());
}
// Don't remove handles after shutdown
if (!mShuttingDown) {
if (aHandle->IsSpecialFile()) {
mSpecialHandles.RemoveElement(aHandle);
} else {
mHandles.RemoveHandle(aHandle);
}
}
}
// static
nsresult CacheFileIOManager::Read(CacheFileHandle* aHandle, int64_t aOffset,
char* aBuf, int32_t aCount,
CacheFileIOListener* aCallback) {
LOG(("CacheFileIOManager::Read() [handle=%p, offset=%" PRId64 ", count=%d, "
"listener=%p]",
aHandle, aOffset, aCount, aCallback));
if (CacheObserver::ShuttingDown()) {
LOG((" no reads after shutdown"));
return NS_ERROR_NOT_INITIALIZED;
}
nsresult rv;
RefPtr<CacheFileIOManager> ioMan = gInstance;
if (aHandle->IsClosed() || !ioMan) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<ReadEvent> ev =
new ReadEvent(aHandle, aOffset, aBuf, aCount, aCallback);
rv = ioMan->mIOThread->Dispatch(ev, aHandle->IsPriority()
? CacheIOThread::READ_PRIORITY
: CacheIOThread::READ);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult CacheFileIOManager::ReadInternal(CacheFileHandle* aHandle,
int64_t aOffset, char* aBuf,
int32_t aCount) {
LOG(("CacheFileIOManager::ReadInternal() [handle=%p, offset=%" PRId64
", count=%d]",
aHandle, aOffset, aCount));
nsresult rv;
if (CacheObserver::ShuttingDown()) {
LOG((" no reads after shutdown"));
return NS_ERROR_NOT_INITIALIZED;
}
if (!aHandle->mFileExists) {
NS_WARNING("Trying to read from non-existent file");
return NS_ERROR_NOT_AVAILABLE;
}
CacheIOThread::Cancelable cancelable(!aHandle->IsSpecialFile());
if (!aHandle->mFD) {
rv = OpenNSPRHandle(aHandle);
NS_ENSURE_SUCCESS(rv, rv);
} else {
NSPRHandleUsed(aHandle);
}
// Check again, OpenNSPRHandle could figure out the file was gone.
if (!aHandle->mFileExists) {
NS_WARNING("Trying to read from non-existent file");
return NS_ERROR_NOT_AVAILABLE;
}
int64_t offset = PR_Seek64(aHandle->mFD, aOffset, PR_SEEK_SET);
if (offset == -1) {
return NS_ERROR_FAILURE;
}
int32_t bytesRead = PR_Read(aHandle->mFD, aBuf, aCount);
if (bytesRead != aCount) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
// static
nsresult CacheFileIOManager::Write(CacheFileHandle* aHandle, int64_t aOffset,
const char* aBuf, int32_t aCount,
bool aValidate, bool aTruncate,
CacheFileIOListener* aCallback) {
LOG(("CacheFileIOManager::Write() [handle=%p, offset=%" PRId64 ", count=%d, "
"validate=%d, truncate=%d, listener=%p]",
aHandle, aOffset, aCount, aValidate, aTruncate, aCallback));
nsresult rv;
RefPtr<CacheFileIOManager> ioMan = gInstance;
if (aHandle->IsClosed() || (aCallback && aCallback->IsKilled()) || !ioMan) {
if (!aCallback) {
// When no callback is provided, CacheFileIOManager is responsible for
// releasing the buffer. We must release it even in case of failure.
free(const_cast<char*>(aBuf));
}
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<WriteEvent> ev = new WriteEvent(aHandle, aOffset, aBuf, aCount,
aValidate, aTruncate, aCallback);
rv = ioMan->mIOThread->Dispatch(ev, aHandle->mPriority
? CacheIOThread::WRITE_PRIORITY
: CacheIOThread::WRITE);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
static nsresult TruncFile(PRFileDesc* aFD, int64_t aEOF) {
#if defined(XP_UNIX)
if (ftruncate(PR_FileDesc2NativeHandle(aFD), aEOF) != 0) {
NS_ERROR("ftruncate failed");
return NS_ERROR_FAILURE;
}
#elif defined(XP_WIN)
int64_t cnt = PR_Seek64(aFD, aEOF, PR_SEEK_SET);
if (cnt == -1) {
return NS_ERROR_FAILURE;
}
if (!SetEndOfFile((HANDLE)PR_FileDesc2NativeHandle(aFD))) {
NS_ERROR("SetEndOfFile failed");
return NS_ERROR_FAILURE;
}
#else
MOZ_ASSERT(false, "Not implemented!");
return NS_ERROR_NOT_IMPLEMENTED;
#endif
return NS_OK;
}
nsresult CacheFileIOManager::WriteInternal(CacheFileHandle* aHandle,
int64_t aOffset, const char* aBuf,
int32_t aCount, bool aValidate,
bool aTruncate) {
LOG(("CacheFileIOManager::WriteInternal() [handle=%p, offset=%" PRId64
", count=%d, "
"validate=%d, truncate=%d]",
aHandle, aOffset, aCount, aValidate, aTruncate));
nsresult rv;
if (aHandle->mKilled) {
LOG((" handle already killed, nothing written"));
return NS_OK;
}
if (CacheObserver::ShuttingDown() && (!aValidate || !aHandle->mFD)) {
aHandle->mKilled = true;
LOG((" killing the handle, nothing written"));
return NS_OK;
}
if (CacheObserver::IsPastShutdownIOLag()) {
LOG((" past the shutdown I/O lag, nothing written"));
// Pretend the write has succeeded, otherwise upper layers will doom
// the file and we end up with I/O anyway.
return NS_OK;
}
CacheIOThread::Cancelable cancelable(!aHandle->IsSpecialFile());
if (!aHandle->mFileExists) {
rv = CreateFile(aHandle);
NS_ENSURE_SUCCESS(rv, rv);
}
if (!aHandle->mFD) {
rv = OpenNSPRHandle(aHandle);
NS_ENSURE_SUCCESS(rv, rv);
} else {
NSPRHandleUsed(aHandle);
}
// Check again, OpenNSPRHandle could figure out the file was gone.
if (!aHandle->mFileExists) {
return NS_ERROR_NOT_AVAILABLE;
}
// When this operation would increase cache size, check whether the cache size
// reached the hard limit and whether it would cause critical low disk space.
if (aHandle->mFileSize < aOffset + aCount) {
if (mOverLimitEvicting && mCacheSizeOnHardLimit) {
LOG(
("CacheFileIOManager::WriteInternal() - failing because cache size "
"reached hard limit!"));
return NS_ERROR_FILE_NO_DEVICE_SPACE;
}
int64_t freeSpace;
rv = mCacheDirectory->GetDiskSpaceAvailable(&freeSpace);
if (NS_WARN_IF(NS_FAILED(rv))) {
freeSpace = -1;
LOG(
("CacheFileIOManager::WriteInternal() - GetDiskSpaceAvailable() "
"failed! [rv=0x%08" PRIx32 "]",
static_cast<uint32_t>(rv)));
} else {
freeSpace >>= 10; // bytes to kilobytes
uint32_t limit = CacheObserver::DiskFreeSpaceHardLimit();
if (freeSpace - aOffset - aCount + aHandle->mFileSize < limit) {
LOG(
("CacheFileIOManager::WriteInternal() - Low free space, refusing "
"to write! [freeSpace=%" PRId64 "kB, limit=%ukB]",
freeSpace, limit));
return NS_ERROR_FILE_NO_DEVICE_SPACE;
}
}
}
// Write invalidates the entry by default
aHandle->mInvalid = true;
int64_t offset = PR_Seek64(aHandle->mFD, aOffset, PR_SEEK_SET);
if (offset == -1) {
return NS_ERROR_FAILURE;
}
int32_t bytesWritten = PR_Write(aHandle->mFD, aBuf, aCount);
if (bytesWritten != -1) {
uint32_t oldSizeInK = aHandle->FileSizeInK();
int64_t writeEnd = aOffset + bytesWritten;
if (aTruncate) {
rv = TruncFile(aHandle->mFD, writeEnd);
NS_ENSURE_SUCCESS(rv, rv);
aHandle->mFileSize = writeEnd;
} else {
if (aHandle->mFileSize < writeEnd) {
aHandle->mFileSize = writeEnd;
}
}
uint32_t newSizeInK = aHandle->FileSizeInK();
if (oldSizeInK != newSizeInK && !aHandle->IsDoomed() &&
!aHandle->IsSpecialFile()) {
CacheIndex::UpdateEntry(aHandle->Hash(), nullptr, nullptr, nullptr,
nullptr, nullptr, &newSizeInK);
if (oldSizeInK < newSizeInK) {
EvictIfOverLimitInternal();
}
}
CacheIndex::UpdateTotalBytesWritten(bytesWritten);
}
if (bytesWritten != aCount) {
return NS_ERROR_FAILURE;
}
// Write was successful and this write validates the entry (i.e. metadata)
if (aValidate) {
aHandle->mInvalid = false;
}
return NS_OK;
}
// static
nsresult CacheFileIOManager::DoomFile(CacheFileHandle* aHandle,
CacheFileIOListener* aCallback) {
LOG(("CacheFileIOManager::DoomFile() [handle=%p, listener=%p]", aHandle,
aCallback));
nsresult rv;
RefPtr<CacheFileIOManager> ioMan = gInstance;
if (aHandle->IsClosed() || !ioMan) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<DoomFileEvent> ev = new DoomFileEvent(aHandle, aCallback);
rv = ioMan->mIOThread->Dispatch(ev, aHandle->IsPriority()
? CacheIOThread::OPEN_PRIORITY
: CacheIOThread::OPEN);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult CacheFileIOManager::DoomFileInternal(
CacheFileHandle* aHandle, PinningDoomRestriction aPinningDoomRestriction) {
LOG(("CacheFileIOManager::DoomFileInternal() [handle=%p]", aHandle));
aHandle->Log();
MOZ_ASSERT(CacheFileIOManager::IsOnIOThreadOrCeased());
nsresult rv;
if (aHandle->IsDoomed()) {
return NS_OK;
}
CacheIOThread::Cancelable cancelable(!aHandle->IsSpecialFile());
if (aPinningDoomRestriction > NO_RESTRICTION) {
switch (aHandle->mPinning) {
case CacheFileHandle::PinningStatus::NON_PINNED:
if (MOZ_LIKELY(aPinningDoomRestriction != DOOM_WHEN_NON_PINNED)) {
LOG((" not dooming, it's a non-pinned handle"));
return NS_OK;
}
// Doom now
break;
case CacheFileHandle::PinningStatus::PINNED:
if (MOZ_UNLIKELY(aPinningDoomRestriction != DOOM_WHEN_PINNED)) {
LOG((" not dooming, it's a pinned handle"));
return NS_OK;
}
// Doom now
break;
case CacheFileHandle::PinningStatus::UNKNOWN:
if (MOZ_LIKELY(aPinningDoomRestriction == DOOM_WHEN_NON_PINNED)) {
LOG((" doom when non-pinned set"));
aHandle->mDoomWhenFoundNonPinned = true;
} else if (MOZ_UNLIKELY(aPinningDoomRestriction == DOOM_WHEN_PINNED)) {
LOG((" doom when pinned set"));
aHandle->mDoomWhenFoundPinned = true;
}
LOG((" pinning status not known, deferring doom decision"));
return NS_OK;
}
}
if (aHandle->mFileExists) {
// we need to move the current file to the doomed directory
rv = MaybeReleaseNSPRHandleInternal(aHandle, true);
NS_ENSURE_SUCCESS(rv, rv);
// find unused filename
nsCOMPtr<nsIFile> file;
rv = GetDoomedFile(getter_AddRefs(file));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIFile> parentDir;
rv = file->GetParent(getter_AddRefs(parentDir));
NS_ENSURE_SUCCESS(rv, rv);
nsAutoCString leafName;
rv = file->GetNativeLeafName(leafName);
NS_ENSURE_SUCCESS(rv, rv);
rv = aHandle->mFile->MoveToNative(parentDir, leafName);
if (NS_ERROR_FILE_NOT_FOUND == rv) {
LOG((" file already removed under our hands"));
aHandle->mFileExists = false;
rv = NS_OK;
} else {
NS_ENSURE_SUCCESS(rv, rv);
aHandle->mFile.swap(file);
}
}
if (!aHandle->IsSpecialFile()) {
CacheIndex::RemoveEntry(aHandle->Hash());
}
aHandle->mIsDoomed = true;
if (!aHandle->IsSpecialFile()) {
RefPtr<CacheStorageService> storageService = CacheStorageService::Self();
if (storageService) {
nsAutoCString idExtension, url;
nsCOMPtr<nsILoadContextInfo> info =
CacheFileUtils::ParseKey(aHandle->Key(), &idExtension, &url);
MOZ_ASSERT(info);
if (info) {
storageService->CacheFileDoomed(info, idExtension, url);
}
}
}
return NS_OK;
}
// static
nsresult CacheFileIOManager::DoomFileByKey(const nsACString& aKey,
CacheFileIOListener* aCallback) {
LOG(("CacheFileIOManager::DoomFileByKey() [key=%s, listener=%p]",
PromiseFlatCString(aKey).get(), aCallback));
nsresult rv;
RefPtr<CacheFileIOManager> ioMan = gInstance;
if (!ioMan) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<DoomFileByKeyEvent> ev = new DoomFileByKeyEvent(aKey, aCallback);
rv = ioMan->mIOThread->DispatchAfterPendingOpens(ev);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult CacheFileIOManager::DoomFileByKeyInternal(const SHA1Sum::Hash* aHash) {
LOG((
"CacheFileIOManager::DoomFileByKeyInternal() [hash=%08x%08x%08x%08x%08x]",
LOGSHA1(aHash)));
MOZ_ASSERT(CacheFileIOManager::IsOnIOThreadOrCeased());
nsresult rv;
if (mShuttingDown) {
return NS_ERROR_NOT_INITIALIZED;
}
if (!mCacheDirectory) {
return NS_ERROR_FILE_INVALID_PATH;
}
// Find active handle
RefPtr<CacheFileHandle> handle;
mHandles.GetHandle(aHash, getter_AddRefs(handle));
if (handle) {
handle->Log();
return DoomFileInternal(handle);
}
CacheIOThread::Cancelable cancelable(true);
// There is no handle for this file, delete the file if exists
nsCOMPtr<nsIFile> file;
rv = GetFile(aHash, getter_AddRefs(file));
NS_ENSURE_SUCCESS(rv, rv);
bool exists;
rv = file->Exists(&exists);
NS_ENSURE_SUCCESS(rv, rv);
if (!exists) {
return NS_ERROR_NOT_AVAILABLE;
}
LOG(
("CacheFileIOManager::DoomFileByKeyInternal() - Removing file from "
"disk"));
rv = file->Remove(false);
if (NS_FAILED(rv)) {
NS_WARNING("Cannot remove old entry from the disk");
LOG(
("CacheFileIOManager::DoomFileByKeyInternal() - Removing file failed. "
"[rv=0x%08" PRIx32 "]",
static_cast<uint32_t>(rv)));
}
CacheIndex::RemoveEntry(aHash);
return NS_OK;
}
// static
nsresult CacheFileIOManager::ReleaseNSPRHandle(CacheFileHandle* aHandle) {
LOG(("CacheFileIOManager::ReleaseNSPRHandle() [handle=%p]", aHandle));
nsresult rv;
RefPtr<CacheFileIOManager> ioMan = gInstance;
if (aHandle->IsClosed() || !ioMan) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<ReleaseNSPRHandleEvent> ev = new ReleaseNSPRHandleEvent(aHandle);
rv = ioMan->mIOThread->Dispatch(ev, aHandle->mPriority
? CacheIOThread::WRITE_PRIORITY
: CacheIOThread::WRITE);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult CacheFileIOManager::MaybeReleaseNSPRHandleInternal(
CacheFileHandle* aHandle, bool aIgnoreShutdownLag) {
LOG(
("CacheFileIOManager::MaybeReleaseNSPRHandleInternal() [handle=%p, "
"ignore shutdown=%d]",
aHandle, aIgnoreShutdownLag));
MOZ_ASSERT(CacheFileIOManager::IsOnIOThreadOrCeased());
if (aHandle->mFD) {
DebugOnly<bool> found{};
found = mHandlesByLastUsed.RemoveElement(aHandle);
MOZ_ASSERT(found);
}
PRFileDesc* fd = aHandle->mFD;
aHandle->mFD = nullptr;
// Leak invalid (w/o metadata) and doomed handles immediately after shutdown.
// Leak other handles when past the shutdown time maximum lag.
if (
#ifndef DEBUG
((aHandle->mInvalid || aHandle->mIsDoomed) &&
MOZ_UNLIKELY(CacheObserver::ShuttingDown())) ||
#endif
MOZ_UNLIKELY(!aIgnoreShutdownLag &&
CacheObserver::IsPastShutdownIOLag())) {
// Don't bother closing this file. Return a failure code from here will
// cause any following IO operation on the file (mainly removal) to be
// bypassed, which is what we want.
// For mInvalid == true the entry will never be used, since it doesn't
// have correct metadata, thus we don't need to worry about removing it.
// For mIsDoomed == true the file is already in the doomed sub-dir and
// will be removed on next session start.
LOG((" past the shutdown I/O lag, leaking file handle"));
return NS_ERROR_ILLEGAL_DURING_SHUTDOWN;
}
if (!fd) {
// The filedesc has already been closed before, just let go.
return NS_OK;
}
CacheIOThread::Cancelable cancelable(!aHandle->IsSpecialFile());
PRStatus status = PR_Close(fd);
if (status != PR_SUCCESS) {
LOG(
("CacheFileIOManager::MaybeReleaseNSPRHandleInternal() "
"failed to close [handle=%p, status=%u]",
aHandle, status));
return NS_ERROR_FAILURE;
}
LOG(("CacheFileIOManager::MaybeReleaseNSPRHandleInternal() DONE"));
return NS_OK;
}
// static
nsresult CacheFileIOManager::TruncateSeekSetEOF(
CacheFileHandle* aHandle, int64_t aTruncatePos, int64_t aEOFPos,
CacheFileIOListener* aCallback) {
LOG(
("CacheFileIOManager::TruncateSeekSetEOF() [handle=%p, "
"truncatePos=%" PRId64 ", "
"EOFPos=%" PRId64 ", listener=%p]",
aHandle, aTruncatePos, aEOFPos, aCallback));
nsresult rv;
RefPtr<CacheFileIOManager> ioMan = gInstance;
if (aHandle->IsClosed() || (aCallback && aCallback->IsKilled()) || !ioMan) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<TruncateSeekSetEOFEvent> ev =
new TruncateSeekSetEOFEvent(aHandle, aTruncatePos, aEOFPos, aCallback);
rv = ioMan->mIOThread->Dispatch(ev, aHandle->mPriority
? CacheIOThread::WRITE_PRIORITY
: CacheIOThread::WRITE);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
// static
void CacheFileIOManager::GetCacheDirectory(nsIFile** result) {
*result = nullptr;
RefPtr<CacheFileIOManager> ioMan = gInstance;
if (!ioMan || !ioMan->mCacheDirectory) {
return;
}
ioMan->mCacheDirectory->Clone(result);
}
#if defined(MOZ_WIDGET_ANDROID)
// static
void CacheFileIOManager::GetProfilelessCacheDirectory(nsIFile** result) {
*result = nullptr;
RefPtr<CacheFileIOManager> ioMan = gInstance;
if (!ioMan || !ioMan->mCacheProfilelessDirectory) {
return;
}
ioMan->mCacheProfilelessDirectory->Clone(result);
}
#endif
// static
nsresult CacheFileIOManager::GetEntryInfo(
const SHA1Sum::Hash* aHash,
CacheStorageService::EntryInfoCallback* aCallback) {
MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
nsresult rv;
RefPtr<CacheFileIOManager> ioMan = gInstance;
if (!ioMan) {
return NS_ERROR_NOT_INITIALIZED;
}
nsAutoCString enhanceId;
nsAutoCString uriSpec;
RefPtr<CacheFileHandle> handle;
ioMan->mHandles.GetHandle(aHash, getter_AddRefs(handle));
if (handle) {
RefPtr<nsILoadContextInfo> info =
CacheFileUtils::ParseKey(handle->Key(), &enhanceId, &uriSpec);
MOZ_ASSERT(info);
if (!info) {
return NS_OK; // ignore
}
RefPtr<CacheStorageService> service = CacheStorageService::Self();
if (!service) {
return NS_ERROR_NOT_INITIALIZED;
}
// Invokes OnCacheEntryInfo when an existing entry is found
if (service->GetCacheEntryInfo(info, enhanceId, uriSpec, aCallback)) {
return NS_OK;
}
// When we are here, there is no existing entry and we need
// to synchrnously load metadata from a disk file.
}
// Locate the actual file
nsCOMPtr<nsIFile> file;
ioMan->GetFile(aHash, getter_AddRefs(file));
// Read metadata from the file synchronously
RefPtr<CacheFileMetadata> metadata = new CacheFileMetadata();
rv = metadata->SyncReadMetadata(file);
if (NS_FAILED(rv)) {
return NS_OK;
}
// Now get the context + enhance id + URL from the key.
RefPtr<nsILoadContextInfo> info =
CacheFileUtils::ParseKey(metadata->GetKey(), &enhanceId, &uriSpec);
MOZ_ASSERT(info);
if (!info) {
return NS_OK;
}
// Pick all data to pass to the callback.
int64_t dataSize = metadata->Offset();
int64_t altDataSize = 0;
uint32_t fetchCount = metadata->GetFetchCount();
uint32_t expirationTime = metadata->GetExpirationTime();
uint32_t lastModified = metadata->GetLastModified();
const char* altDataElement =
metadata->GetElement(CacheFileUtils::kAltDataKey);
if (altDataElement) {
int64_t altDataOffset = std::numeric_limits<int64_t>::max();
if (NS_SUCCEEDED(CacheFileUtils::ParseAlternativeDataInfo(
altDataElement, &altDataOffset, nullptr)) &&
altDataOffset < dataSize) {
dataSize = altDataOffset;
altDataSize = metadata->Offset() - altDataOffset;
} else {
LOG(("CacheFileIOManager::GetEntryInfo() invalid alternative data info"));
return NS_OK;
}
}
// Call directly on the callback.
aCallback->OnEntryInfo(uriSpec, enhanceId, dataSize, altDataSize, fetchCount,
lastModified, expirationTime, metadata->Pinned(),
info);
return NS_OK;
}
nsresult CacheFileIOManager::TruncateSeekSetEOFInternal(
CacheFileHandle* aHandle, int64_t aTruncatePos, int64_t aEOFPos) {
LOG(
("CacheFileIOManager::TruncateSeekSetEOFInternal() [handle=%p, "
"truncatePos=%" PRId64 ", EOFPos=%" PRId64 "]",
aHandle, aTruncatePos, aEOFPos));
nsresult rv;
if (aHandle->mKilled) {
LOG((" handle already killed, file not truncated"));
return NS_OK;
}
if (CacheObserver::ShuttingDown() && !aHandle->mFD) {
aHandle->mKilled = true;
LOG((" killing the handle, file not truncated"));
return NS_OK;
}
CacheIOThread::Cancelable cancelable(!aHandle->IsSpecialFile());
if (!aHandle->mFileExists) {
rv = CreateFile(aHandle);
NS_ENSURE_SUCCESS(rv, rv);
}
if (!aHandle->mFD) {
rv = OpenNSPRHandle(aHandle);
NS_ENSURE_SUCCESS(rv, rv);
} else {
NSPRHandleUsed(aHandle);
}
// Check again, OpenNSPRHandle could figure out the file was gone.
if (!aHandle->mFileExists) {
return NS_ERROR_NOT_AVAILABLE;
}
// When this operation would increase cache size, check whether the cache size
// reached the hard limit and whether it would cause critical low disk space.
if (aHandle->mFileSize < aEOFPos) {
if (mOverLimitEvicting && mCacheSizeOnHardLimit) {
LOG(
("CacheFileIOManager::TruncateSeekSetEOFInternal() - failing because "
"cache size reached hard limit!"));
return NS_ERROR_FILE_NO_DEVICE_SPACE;
}
int64_t freeSpace;
rv = mCacheDirectory->GetDiskSpaceAvailable(&freeSpace);
if (NS_WARN_IF(NS_FAILED(rv))) {
freeSpace = -1;
LOG(
("CacheFileIOManager::TruncateSeekSetEOFInternal() - "
"GetDiskSpaceAvailable() failed! [rv=0x%08" PRIx32 "]",
static_cast<uint32_t>(rv)));
} else {
freeSpace >>= 10; // bytes to kilobytes
uint32_t limit = CacheObserver::DiskFreeSpaceHardLimit();
if (freeSpace - aEOFPos + aHandle->mFileSize < limit) {
LOG(
("CacheFileIOManager::TruncateSeekSetEOFInternal() - Low free space"
", refusing to write! [freeSpace=%" PRId64 "kB, limit=%ukB]",
freeSpace, limit));
return NS_ERROR_FILE_NO_DEVICE_SPACE;
}
}
}
// This operation always invalidates the entry
aHandle->mInvalid = true;
rv = TruncFile(aHandle->mFD, aTruncatePos);
NS_ENSURE_SUCCESS(rv, rv);
if (aTruncatePos != aEOFPos) {
rv = TruncFile(aHandle->mFD, aEOFPos);
NS_ENSURE_SUCCESS(rv, rv);
}
uint32_t oldSizeInK = aHandle->FileSizeInK();
aHandle->mFileSize = aEOFPos;
uint32_t newSizeInK = aHandle->FileSizeInK();
if (oldSizeInK != newSizeInK && !aHandle->IsDoomed() &&
!aHandle->IsSpecialFile()) {
CacheIndex::UpdateEntry(aHandle->Hash(), nullptr, nullptr, nullptr, nullptr,
nullptr, &newSizeInK);
if (oldSizeInK < newSizeInK) {
EvictIfOverLimitInternal();
}
}
return NS_OK;
}
// static
nsresult CacheFileIOManager::RenameFile(CacheFileHandle* aHandle,
const nsACString& aNewName,
CacheFileIOListener* aCallback) {
LOG(("CacheFileIOManager::RenameFile() [handle=%p, newName=%s, listener=%p]",
aHandle, PromiseFlatCString(aNewName).get(), aCallback));
nsresult rv;
RefPtr<CacheFileIOManager> ioMan = gInstance;
if (aHandle->IsClosed() || !ioMan) {
return NS_ERROR_NOT_INITIALIZED;
}
if (!aHandle->IsSpecialFile()) {
return NS_ERROR_UNEXPECTED;
}
RefPtr<RenameFileEvent> ev =
new RenameFileEvent(aHandle, aNewName, aCallback);
rv = ioMan->mIOThread->Dispatch(ev, aHandle->mPriority
? CacheIOThread::WRITE_PRIORITY
: CacheIOThread::WRITE);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult CacheFileIOManager::RenameFileInternal(CacheFileHandle* aHandle,
const nsACString& aNewName) {
LOG(("CacheFileIOManager::RenameFileInternal() [handle=%p, newName=%s]",
aHandle, PromiseFlatCString(aNewName).get()));
nsresult rv;
MOZ_ASSERT(aHandle->IsSpecialFile());
if (aHandle->IsDoomed()) {
return NS_ERROR_NOT_AVAILABLE;
}
// Doom old handle if it exists and is not doomed
for (uint32_t i = 0; i < mSpecialHandles.Length(); i++) {
if (!mSpecialHandles[i]->IsDoomed() &&
mSpecialHandles[i]->Key() == aNewName) {
MOZ_ASSERT(aHandle != mSpecialHandles[i]);
rv = DoomFileInternal(mSpecialHandles[i]);
NS_ENSURE_SUCCESS(rv, rv);
break;
}
}
nsCOMPtr<nsIFile> file;
rv = GetSpecialFile(aNewName, getter_AddRefs(file));
NS_ENSURE_SUCCESS(rv, rv);
bool exists;
rv = file->Exists(&exists);
NS_ENSURE_SUCCESS(rv, rv);
if (exists) {
LOG(
("CacheFileIOManager::RenameFileInternal() - Removing old file from "
"disk"));
rv = file->Remove(false);
if (NS_FAILED(rv)) {
NS_WARNING("Cannot remove file from the disk");
LOG(
("CacheFileIOManager::RenameFileInternal() - Removing old file failed"
". [rv=0x%08" PRIx32 "]",
static_cast<uint32_t>(rv)));
}
}
if (!aHandle->FileExists()) {
aHandle->mKey = aNewName;
return NS_OK;
}
rv = MaybeReleaseNSPRHandleInternal(aHandle, true);
NS_ENSURE_SUCCESS(rv, rv);
rv = aHandle->mFile->MoveToNative(nullptr, aNewName);
NS_ENSURE_SUCCESS(rv, rv);
aHandle->mKey = aNewName;
return NS_OK;
}
// static
nsresult CacheFileIOManager::EvictIfOverLimit() {
LOG(("CacheFileIOManager::EvictIfOverLimit()"));
nsresult rv;
RefPtr<CacheFileIOManager> ioMan = gInstance;
if (!ioMan) {
return NS_ERROR_NOT_INITIALIZED;
}
nsCOMPtr<nsIRunnable> ev;
ev = NewRunnableMethod("net::CacheFileIOManager::EvictIfOverLimitInternal",
ioMan, &CacheFileIOManager::EvictIfOverLimitInternal);
rv = ioMan->mIOThread->Dispatch(ev, CacheIOThread::EVICT);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult CacheFileIOManager::EvictIfOverLimitInternal() {
LOG(("CacheFileIOManager::EvictIfOverLimitInternal()"));
nsresult rv;
MOZ_ASSERT(mIOThread->IsCurrentThread());
if (mShuttingDown) {
return NS_ERROR_NOT_INITIALIZED;
}
if (mOverLimitEvicting) {
LOG(
("CacheFileIOManager::EvictIfOverLimitInternal() - Eviction already "
"running."));
return NS_OK;
}
CacheIOThread::Cancelable cancelable(true);
int64_t freeSpace;
rv = mCacheDirectory->GetDiskSpaceAvailable(&freeSpace);
if (NS_WARN_IF(NS_FAILED(rv))) {
freeSpace = -1;
// Do not change smart size.
LOG(
("CacheFileIOManager::EvictIfOverLimitInternal() - "
"GetDiskSpaceAvailable() failed! [rv=0x%08" PRIx32 "]",
static_cast<uint32_t>(rv)));
} else {
freeSpace >>= 10; // bytes to kilobytes
UpdateSmartCacheSize(freeSpace);
}
uint32_t cacheUsage;
rv = CacheIndex::GetCacheSize(&cacheUsage);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t cacheLimit = CacheObserver::DiskCacheCapacity();
uint32_t freeSpaceLimit = CacheObserver::DiskFreeSpaceSoftLimit();
if (cacheUsage <= cacheLimit &&
(freeSpace == -1 || freeSpace >= freeSpaceLimit)) {
LOG(
("CacheFileIOManager::EvictIfOverLimitInternal() - Cache size and free "
"space in limits. [cacheSize=%ukB, cacheSizeLimit=%ukB, "
"freeSpace=%" PRId64 "kB, freeSpaceLimit=%ukB]",
cacheUsage, cacheLimit, freeSpace, freeSpaceLimit));
return NS_OK;
}
LOG(
("CacheFileIOManager::EvictIfOverLimitInternal() - Cache size exceeded "
"limit. Starting overlimit eviction. [cacheSize=%ukB, limit=%ukB]",
cacheUsage, cacheLimit));
nsCOMPtr<nsIRunnable> ev;
ev = NewRunnableMethod("net::CacheFileIOManager::OverLimitEvictionInternal",
this, &CacheFileIOManager::OverLimitEvictionInternal);
rv = mIOThread->Dispatch(ev, CacheIOThread::EVICT);
NS_ENSURE_SUCCESS(rv, rv);
mOverLimitEvicting = true;
return NS_OK;
}
nsresult CacheFileIOManager::OverLimitEvictionInternal() {
LOG(("CacheFileIOManager::OverLimitEvictionInternal()"));
nsresult rv;
MOZ_ASSERT(mIOThread->IsCurrentThread());
// mOverLimitEvicting is accessed only on IO thread, so we can set it to false
// here and set it to true again once we dispatch another event that will
// continue with the eviction. The reason why we do so is that we can fail
// early anywhere in this method and the variable will contain a correct
// value. Otherwise we would need to set it to false on every failing place.
mOverLimitEvicting = false;
if (mShuttingDown) {
return NS_ERROR_NOT_INITIALIZED;
}
while (true) {
int64_t freeSpace;
rv = mCacheDirectory->GetDiskSpaceAvailable(&freeSpace);
if (NS_WARN_IF(NS_FAILED(rv))) {
freeSpace = -1;
// Do not change smart size.
LOG(
("CacheFileIOManager::EvictIfOverLimitInternal() - "
"GetDiskSpaceAvailable() failed! [rv=0x%08" PRIx32 "]",
static_cast<uint32_t>(rv)));
} else {
freeSpace >>= 10; // bytes to kilobytes
UpdateSmartCacheSize(freeSpace);
}
uint32_t cacheUsage;
rv = CacheIndex::GetCacheSize(&cacheUsage);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t cacheLimit = CacheObserver::DiskCacheCapacity();
uint32_t freeSpaceLimit = CacheObserver::DiskFreeSpaceSoftLimit();
if (cacheUsage > cacheLimit) {
LOG(
("CacheFileIOManager::OverLimitEvictionInternal() - Cache size over "
"limit. [cacheSize=%ukB, limit=%ukB]",
cacheUsage, cacheLimit));
// We allow cache size to go over the specified limit. Eviction should
// keep the size within the limit in a long run, but in case the eviction
// is too slow, the cache could go way over the limit. To prevent this we
// set flag mCacheSizeOnHardLimit when the size reaches 105% of the limit
// and WriteInternal() and TruncateSeekSetEOFInternal() fail to cache
// additional data.
if ((cacheUsage - cacheLimit) > (cacheLimit / 20)) {
LOG(
("CacheFileIOManager::OverLimitEvictionInternal() - Cache size "
"reached hard limit."));
mCacheSizeOnHardLimit = true;
} else {
mCacheSizeOnHardLimit = false;
}
} else if (freeSpace != -1 && freeSpace < freeSpaceLimit) {
LOG(
("CacheFileIOManager::OverLimitEvictionInternal() - Free space under "
"limit. [freeSpace=%" PRId64 "kB, freeSpaceLimit=%ukB]",
freeSpace, freeSpaceLimit));
} else {
LOG(
("CacheFileIOManager::OverLimitEvictionInternal() - Cache size and "
"free space in limits. [cacheSize=%ukB, cacheSizeLimit=%ukB, "
"freeSpace=%" PRId64 "kB, freeSpaceLimit=%ukB]",
cacheUsage, cacheLimit, freeSpace, freeSpaceLimit));
mCacheSizeOnHardLimit = false;
return NS_OK;
}
if (CacheIOThread::YieldAndRerun()) {
LOG(
("CacheFileIOManager::OverLimitEvictionInternal() - Breaking loop "
"for higher level events."));
mOverLimitEvicting = true;
return NS_OK;
}
SHA1Sum::Hash hash;
uint32_t cnt;
static uint32_t consecutiveFailures = 0;
rv = CacheIndex::GetEntryForEviction(false, &hash, &cnt);
NS_ENSURE_SUCCESS(rv, rv);
rv = DoomFileByKeyInternal(&hash);
if (NS_SUCCEEDED(rv)) {
consecutiveFailures = 0;
} else if (rv == NS_ERROR_NOT_AVAILABLE) {
LOG(
("CacheFileIOManager::OverLimitEvictionInternal() - "
"DoomFileByKeyInternal() failed. [rv=0x%08" PRIx32 "]",
static_cast<uint32_t>(rv)));
// TODO index is outdated, start update
// Make sure index won't return the same entry again
CacheIndex::RemoveEntry(&hash);
consecutiveFailures = 0;
} else {
// This shouldn't normally happen, but the eviction must not fail
// completely if we ever encounter this problem.
NS_WARNING(
"CacheFileIOManager::OverLimitEvictionInternal() - Unexpected "
"failure of DoomFileByKeyInternal()");
LOG(
("CacheFileIOManager::OverLimitEvictionInternal() - "
"DoomFileByKeyInternal() failed. [rv=0x%08" PRIx32 "]",
static_cast<uint32_t>(rv)));
// Normally, CacheIndex::UpdateEntry() is called only to update newly
// created/opened entries which are always fresh and UpdateEntry() expects
// and checks this flag. The way we use UpdateEntry() here is a kind of
// hack and we must make sure the flag is set by calling
// EnsureEntryExists().
rv = CacheIndex::EnsureEntryExists(&hash);
NS_ENSURE_SUCCESS(rv, rv);
// Move the entry at the end of both lists to make sure we won't end up
// failing on one entry forever.
uint32_t frecency = 0;
rv = CacheIndex::UpdateEntry(&hash, &frecency, nullptr, nullptr, nullptr,
nullptr, nullptr);
NS_ENSURE_SUCCESS(rv, rv);
consecutiveFailures++;
if (consecutiveFailures >= cnt) {
// This doesn't necessarily mean that we've tried to doom every entry
// but we've reached a sane number of tries. It is likely that another
// eviction will start soon. And as said earlier, this normally doesn't
// happen at all.
return NS_OK;
}
}
}
MOZ_ASSERT_UNREACHABLE("We should never get here");
return NS_OK;
}
// static
nsresult CacheFileIOManager::EvictAll() {
LOG(("CacheFileIOManager::EvictAll()"));
nsresult rv;
RefPtr<CacheFileIOManager> ioMan = gInstance;
if (!ioMan) {
return NS_ERROR_NOT_INITIALIZED;
}
nsCOMPtr<nsIRunnable> ev;
ev = NewRunnableMethod("net::CacheFileIOManager::EvictAllInternal", ioMan,
&CacheFileIOManager::EvictAllInternal);
rv = ioMan->mIOThread->DispatchAfterPendingOpens(ev);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
namespace {
class EvictionNotifierRunnable : public Runnable {
public:
EvictionNotifierRunnable() : Runnable("EvictionNotifierRunnable") {}
NS_DECL_NSIRUNNABLE
};
NS_IMETHODIMP
EvictionNotifierRunnable::Run() {
nsCOMPtr<nsIObserverService> obsSvc = mozilla::services::GetObserverService();
if (obsSvc) {
obsSvc->NotifyObservers(nullptr, "cacheservice:empty-cache", nullptr);
}
return NS_OK;
}
} // namespace
nsresult CacheFileIOManager::EvictAllInternal() {
LOG(("CacheFileIOManager::EvictAllInternal()"));
nsresult rv;
MOZ_ASSERT(mIOThread->IsCurrentThread());
RefPtr<EvictionNotifierRunnable> r = new EvictionNotifierRunnable();
if (!mCacheDirectory) {
// This is a kind of hack. Somebody called EvictAll() without a profile.
// This happens in xpcshell tests that use cache without profile. We need
// to notify observers in this case since the tests are waiting for it.
NS_DispatchToMainThread(r);
return NS_ERROR_FILE_INVALID_PATH;
}
if (mShuttingDown) {
return NS_ERROR_NOT_INITIALIZED;
}
if (!mTreeCreated) {
rv = CreateCacheTree();
if (NS_FAILED(rv)) {
return rv;
}
}
// Doom all active handles
nsTArray<RefPtr<CacheFileHandle>> handles;
mHandles.GetActiveHandles(&handles);
for (uint32_t i = 0; i < handles.Length(); ++i) {
rv = DoomFileInternal(handles[i]);
if (NS_WARN_IF(NS_FAILED(rv))) {
LOG(
("CacheFileIOManager::EvictAllInternal() - Cannot doom handle "
"[handle=%p]",
handles[i].get()));
}
}
nsCOMPtr<nsIFile> file;
rv = mCacheDirectory->Clone(getter_AddRefs(file));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
rv = file->AppendNative(nsLiteralCString(ENTRIES_DIR));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// Trash current entries directory
rv = TrashDirectory(file);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// Files are now inaccessible in entries directory, notify observers.
NS_DispatchToMainThread(r);
// Create a new empty entries directory
rv = CheckAndCreateDir(mCacheDirectory, ENTRIES_DIR, false);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
CacheIndex::RemoveAll();
return NS_OK;
}
// static
nsresult CacheFileIOManager::EvictByContext(
nsILoadContextInfo* aLoadContextInfo, bool aPinned,
const nsAString& aOrigin, const nsAString& aBaseDomain) {
LOG(("CacheFileIOManager::EvictByContext() [loadContextInfo=%p]",
aLoadContextInfo));
nsresult rv;
RefPtr<CacheFileIOManager> ioMan = gInstance;
if (!ioMan) {
return NS_ERROR_NOT_INITIALIZED;
}
nsCOMPtr<nsIRunnable> ev;
ev =
NewRunnableMethod<nsCOMPtr<nsILoadContextInfo>, bool, nsString, nsString>(
"net::CacheFileIOManager::EvictByContextInternal", ioMan,
&CacheFileIOManager::EvictByContextInternal, aLoadContextInfo,
aPinned, aOrigin, aBaseDomain);
rv = ioMan->mIOThread->DispatchAfterPendingOpens(ev);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
nsresult CacheFileIOManager::EvictByContextInternal(
nsILoadContextInfo* aLoadContextInfo, bool aPinned,
const nsAString& aOrigin, const nsAString& aBaseDomain) {
LOG(
("CacheFileIOManager::EvictByContextInternal() [loadContextInfo=%p, "
"pinned=%d]",
aLoadContextInfo, aPinned));
nsresult rv;
if (aLoadContextInfo) {
nsAutoCString suffix;
aLoadContextInfo->OriginAttributesPtr()->CreateSuffix(suffix);
LOG((" anonymous=%u, suffix=%s]", aLoadContextInfo->IsAnonymous(),
suffix.get()));
MOZ_ASSERT(mIOThread->IsCurrentThread());
MOZ_ASSERT(!aLoadContextInfo->IsPrivate());
if (aLoadContextInfo->IsPrivate()) {
return NS_ERROR_INVALID_ARG;
}
}
if (!mCacheDirectory) {
// This is a kind of hack. Somebody called EvictAll() without a profile.
// This happens in xpcshell tests that use cache without profile. We need
// to notify observers in this case since the tests are waiting for it.
// Also notify for aPinned == true, those are interested as well.
if (!aLoadContextInfo) {
RefPtr<EvictionNotifierRunnable> r = new EvictionNotifierRunnable();
NS_DispatchToMainThread(r);
}
return NS_ERROR_FILE_INVALID_PATH;
}
if (mShuttingDown) {
return NS_ERROR_NOT_INITIALIZED;
}
if (!mTreeCreated) {
rv = CreateCacheTree();
if (NS_FAILED(rv)) {
return rv;
}
}
NS_ConvertUTF16toUTF8 origin(aOrigin);
NS_ConvertUTF16toUTF8 baseDomain(aBaseDomain);
// Doom all active handles that matches the load context
nsTArray<RefPtr<CacheFileHandle>> handles;
mHandles.GetActiveHandles(&handles);
for (uint32_t i = 0; i < handles.Length(); ++i) {
CacheFileHandle* handle = handles[i];
const bool shouldRemove = [&] {
nsAutoCString uriSpec;
RefPtr<nsILoadContextInfo> info =
CacheFileUtils::ParseKey(handle->Key(), nullptr, &uriSpec);
if (!info) {
LOG(
("CacheFileIOManager::EvictByContextInternal() - Cannot parse key "
"in "
"handle! [handle=%p, key=%s]",
handle, handle->Key().get()));
MOZ_CRASH("Unexpected error!");
}
// Filter by base domain.
if (!aBaseDomain.IsEmpty()) {
if (StoragePrincipalHelper::PartitionKeyHasBaseDomain(
info->OriginAttributesPtr()->mPartitionKey, aBaseDomain)) {
return true;
}
// If the partitionKey does not match, check the entry URI next.
// Get host portion of uriSpec.
nsCOMPtr<nsIURI> uri;
rv = NS_NewURI(getter_AddRefs(uri), uriSpec);
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
nsAutoCString host;
rv = uri->GetHost(host);
// Some entries may not have valid hosts. We can skip them.
if (NS_FAILED(rv) || host.IsEmpty()) {
return false;
}
// Clear entry if the host belongs to the given base domain.
bool hasRootDomain = false;
rv = HasRootDomain(host, baseDomain, &hasRootDomain);
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
return hasRootDomain;
}
// Filter by LoadContextInfo.
if (aLoadContextInfo && !info->Equals(aLoadContextInfo)) {
return false;
}
// Filter by origin.
if (!origin.IsEmpty()) {
RefPtr<MozURL> url;
rv = MozURL::Init(getter_AddRefs(url), uriSpec);
if (NS_FAILED(rv)) {
return false;
}
nsAutoCString urlOrigin;
url->Origin(urlOrigin);
if (!urlOrigin.Equals(origin)) {
return false;
}
}
return true;
}();
if (!shouldRemove) {
continue;
}
// handle will be doomed only when pinning status is known and equal or
// doom decision will be deferred until pinning status is determined.
rv = DoomFileInternal(handle,
aPinned ? CacheFileIOManager::DOOM_WHEN_PINNED
: CacheFileIOManager::DOOM_WHEN_NON_PINNED);
if (NS_WARN_IF(NS_FAILED(rv))) {
LOG(
("CacheFileIOManager::EvictByContextInternal() - Cannot doom handle"
" [handle=%p]",
handle));
}
}
if (!aLoadContextInfo) {
RefPtr<EvictionNotifierRunnable> r = new EvictionNotifierRunnable();
NS_DispatchToMainThread(r);
}
if (!mContextEvictor) {
mContextEvictor = new CacheFileContextEvictor();
mContextEvictor->Init(mCacheDirectory);
}
mContextEvictor->AddContext(aLoadContextInfo, aPinned, aOrigin);
return NS_OK;
}
// static
nsresult CacheFileIOManager::CacheIndexStateChanged() {
LOG(("CacheFileIOManager::CacheIndexStateChanged()"));
nsresult rv;
// CacheFileIOManager lives longer than CacheIndex so gInstance must be
// non-null here.
MOZ_ASSERT(gInstance);
// We have to re-distatch even if we are on IO thread to prevent reentering
// the lock in CacheIndex
nsCOMPtr<nsIRunnable> ev = NewRunnableMethod(
"net::CacheFileIOManager::CacheIndexStateChangedInternal",
gInstance.get(), &CacheFileIOManager::CacheIndexStateChangedInternal);
nsCOMPtr<nsIEventTarget> ioTarget = IOTarget();
MOZ_ASSERT(ioTarget);
rv = ioTarget->Dispatch(ev, nsIEventTarget::DISPATCH_NORMAL);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
void CacheFileIOManager::CacheIndexStateChangedInternal() {
if (mShuttingDown) {
// ignore notification during shutdown
return;
}
if (!mContextEvictor) {
return;
}
mContextEvictor->CacheIndexStateChanged();
}
nsresult CacheFileIOManager::TrashDirectory(nsIFile* aFile) {
LOG(("CacheFileIOManager::TrashDirectory() [file=%s]",
aFile->HumanReadablePath().get()));
nsresult rv;
MOZ_ASSERT(mIOThread->IsCurrentThread());
MOZ_ASSERT(mCacheDirectory);
// When the directory is empty, it is cheaper to remove it directly instead of
// using the trash mechanism.
bool isEmpty;
rv = IsEmptyDirectory(aFile, &isEmpty);
NS_ENSURE_SUCCESS(rv, rv);
if (isEmpty) {
rv = aFile->Remove(false);
LOG(
("CacheFileIOManager::TrashDirectory() - Directory removed "
"[rv=0x%08" PRIx32 "]",
static_cast<uint32_t>(rv)));
return rv;
}
#ifdef DEBUG
nsCOMPtr<nsIFile> dirCheck;
rv = aFile->GetParent(getter_AddRefs(dirCheck));
NS_ENSURE_SUCCESS(rv, rv);
bool equals = false;
rv = dirCheck->Equals(mCacheDirectory, &equals);
NS_ENSURE_SUCCESS(rv, rv);
MOZ_ASSERT(equals);
#endif
nsCOMPtr<nsIFile> dir, trash;
nsAutoCString leaf;
rv = aFile->Clone(getter_AddRefs(dir));
NS_ENSURE_SUCCESS(rv, rv);
rv = aFile->Clone(getter_AddRefs(trash));
NS_ENSURE_SUCCESS(rv, rv);
const int32_t kMaxTries = 16;
srand(static_cast<unsigned>(PR_Now()));
for (int32_t triesCount = 0;; ++triesCount) {
leaf = TRASH_DIR;
leaf.AppendInt(rand());
rv = trash->SetNativeLeafName(leaf);
NS_ENSURE_SUCCESS(rv, rv);
bool exists;
if (NS_SUCCEEDED(trash->Exists(&exists)) && !exists) {
break;
}
LOG(
("CacheFileIOManager::TrashDirectory() - Trash directory already "
"exists [leaf=%s]",
leaf.get()));
if (triesCount == kMaxTries) {
LOG(
("CacheFileIOManager::TrashDirectory() - Could not find unused trash "
"directory in %d tries.",
kMaxTries));
return NS_ERROR_FAILURE;
}
}
LOG(("CacheFileIOManager::TrashDirectory() - Renaming directory [leaf=%s]",
leaf.get()));
rv = dir->MoveToNative(nullptr, leaf);
NS_ENSURE_SUCCESS(rv, rv);
StartRemovingTrash();
return NS_OK;
}
// static
void CacheFileIOManager::OnTrashTimer(nsITimer* aTimer, void* aClosure) {
LOG(("CacheFileIOManager::OnTrashTimer() [timer=%p, closure=%p]", aTimer,
aClosure));
RefPtr<CacheFileIOManager> ioMan = gInstance;
if (!ioMan) {
return;
}
ioMan->mTrashTimer = nullptr;
ioMan->StartRemovingTrash();
}
nsresult CacheFileIOManager::StartRemovingTrash() {
LOG(("CacheFileIOManager::StartRemovingTrash()"));
nsresult rv;
MOZ_ASSERT(mIOThread->IsCurrentThread());
if (mShuttingDown) {
return NS_ERROR_NOT_INITIALIZED;
}
if (!mCacheDirectory) {
return NS_ERROR_FILE_INVALID_PATH;
}
if (mTrashTimer) {
LOG(("CacheFileIOManager::StartRemovingTrash() - Trash timer exists."));
return NS_OK;
}
if (mRemovingTrashDirs) {
LOG(
("CacheFileIOManager::StartRemovingTrash() - Trash removing in "
"progress."));
return NS_OK;
}
uint32_t elapsed = (TimeStamp::NowLoRes() - mStartTime).ToMilliseconds();
if (elapsed < kRemoveTrashStartDelay) {
nsCOMPtr<nsIEventTarget> ioTarget = IOTarget();
MOZ_ASSERT(ioTarget);
return NS_NewTimerWithFuncCallback(
getter_AddRefs(mTrashTimer), CacheFileIOManager::OnTrashTimer, nullptr,
kRemoveTrashStartDelay - elapsed, nsITimer::TYPE_ONE_SHOT,
"net::CacheFileIOManager::StartRemovingTrash", ioTarget);
}
nsCOMPtr<nsIRunnable> ev;
ev = NewRunnableMethod("net::CacheFileIOManager::RemoveTrashInternal", this,
&CacheFileIOManager::RemoveTrashInternal);
rv = mIOThread->Dispatch(ev, CacheIOThread::EVICT);
NS_ENSURE_SUCCESS(rv, rv);
mRemovingTrashDirs = true;
return NS_OK;
}
nsresult CacheFileIOManager::RemoveTrashInternal() {
LOG(("CacheFileIOManager::RemoveTrashInternal()"));
nsresult rv;
MOZ_ASSERT(mIOThread->IsCurrentThread());
if (mShuttingDown) {
return NS_ERROR_NOT_INITIALIZED;
}
CacheIOThread::Cancelable cancelable(true);
MOZ_ASSERT(!mTrashTimer);
MOZ_ASSERT(mRemovingTrashDirs);
if (!mTreeCreated) {
rv = CreateCacheTree();
if (NS_FAILED(rv)) {
return rv;
}
}
// mRemovingTrashDirs is accessed only on IO thread, so we can drop the flag
// here and set it again once we dispatch a continuation event. By doing so,
// we don't have to drop the flag on any possible early return.
mRemovingTrashDirs = false;
while (true) {
if (CacheIOThread::YieldAndRerun()) {
LOG(
("CacheFileIOManager::RemoveTrashInternal() - Breaking loop for "
"higher level events."));
mRemovingTrashDirs = true;
return NS_OK;
}
// Find some trash directory
if (!mTrashDir) {
MOZ_ASSERT(!mTrashDirEnumerator);
rv = FindTrashDirToRemove();
if (rv == NS_ERROR_NOT_AVAILABLE) {
LOG(
("CacheFileIOManager::RemoveTrashInternal() - No trash directory "
"found."));
return NS_OK;
}
NS_ENSURE_SUCCESS(rv, rv);
rv = mTrashDir->GetDirectoryEntries(getter_AddRefs(mTrashDirEnumerator));
NS_ENSURE_SUCCESS(rv, rv);
continue; // check elapsed time
}
// We null out mTrashDirEnumerator once we remove all files in the
// directory, so remove the trash directory if we don't have enumerator.
if (!mTrashDirEnumerator) {
rv = mTrashDir->Remove(false);
if (NS_FAILED(rv)) {
// There is no reason why removing an empty directory should fail, but
// if it does, we should continue and try to remove all other trash
// directories.
nsAutoCString leafName;
mTrashDir->GetNativeLeafName(leafName);
mFailedTrashDirs.AppendElement(leafName);
LOG(
("CacheFileIOManager::RemoveTrashInternal() - Cannot remove "
"trashdir. [name=%s]",
leafName.get()));
}
mTrashDir = nullptr;
continue; // check elapsed time
}
nsCOMPtr<nsIFile> file;
rv = mTrashDirEnumerator->GetNextFile(getter_AddRefs(file));
if (!file) {
mTrashDirEnumerator->Close();
mTrashDirEnumerator = nullptr;
continue; // check elapsed time
}
bool isDir = false;
file->IsDirectory(&isDir);
if (isDir) {
NS_WARNING(
"Found a directory in a trash directory! It will be removed "
"recursively, but this can block IO thread for a while!");
if (LOG_ENABLED()) {
LOG(
("CacheFileIOManager::RemoveTrashInternal() - Found a directory in "
"a trash "
"directory! It will be removed recursively, but this can block IO "
"thread for a while! [file=%s]",
file->HumanReadablePath().get()));
}
}
file->Remove(isDir);
}
MOZ_ASSERT_UNREACHABLE("We should never get here");
return NS_OK;
}
nsresult CacheFileIOManager::FindTrashDirToRemove() {
LOG(("CacheFileIOManager::FindTrashDirToRemove()"));
nsresult rv;
// We call this method on the main thread during shutdown when user wants to
// remove all cache files.
MOZ_ASSERT(mIOThread->IsCurrentThread() || mShuttingDown);
nsCOMPtr<nsIDirectoryEnumerator> iter;
rv = mCacheDirectory->GetDirectoryEntries(getter_AddRefs(iter));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIFile> file;
while (NS_SUCCEEDED(iter->GetNextFile(getter_AddRefs(file))) && file) {
bool isDir = false;
file->IsDirectory(&isDir);
if (!isDir) {
continue;
}
nsAutoCString leafName;
rv = file->GetNativeLeafName(leafName);
if (NS_FAILED(rv)) {
continue;
}
if (leafName.Length() < strlen(TRASH_DIR)) {
continue;
}
if (!StringBeginsWith(leafName, nsLiteralCString(TRASH_DIR))) {
continue;
}
if (mFailedTrashDirs.Contains(leafName)) {
continue;
}
LOG(("CacheFileIOManager::FindTrashDirToRemove() - Returning directory %s",
leafName.get()));
mTrashDir = file;
return NS_OK;
}
// When we're here we've tried to delete all trash directories. Clear
// mFailedTrashDirs so we will try to delete them again when we start removing
// trash directories next time.
mFailedTrashDirs.Clear();
return NS_ERROR_NOT_AVAILABLE;
}
// static
nsresult CacheFileIOManager::InitIndexEntry(CacheFileHandle* aHandle,
OriginAttrsHash aOriginAttrsHash,
bool aAnonymous, bool aPinning) {
LOG(
("CacheFileIOManager::InitIndexEntry() [handle=%p, "
"originAttrsHash=%" PRIx64 ", "
"anonymous=%d, pinning=%d]",
aHandle, aOriginAttrsHash, aAnonymous, aPinning));
nsresult rv;
RefPtr<CacheFileIOManager> ioMan = gInstance;
if (aHandle->IsClosed() || !ioMan) {
return NS_ERROR_NOT_INITIALIZED;
}
if (aHandle->IsSpecialFile()) {
return NS_ERROR_UNEXPECTED;
}
RefPtr<InitIndexEntryEvent> ev =
new InitIndexEntryEvent(aHandle, aOriginAttrsHash, aAnonymous, aPinning);
rv = ioMan->mIOThread->Dispatch(ev, aHandle->mPriority
? CacheIOThread::WRITE_PRIORITY
: CacheIOThread::WRITE);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
// static
nsresult CacheFileIOManager::UpdateIndexEntry(CacheFileHandle* aHandle,
const uint32_t* aFrecency,
const bool* aHasAltData,
const uint16_t* aOnStartTime,
const uint16_t* aOnStopTime,
const uint8_t* aContentType) {
LOG(
("CacheFileIOManager::UpdateIndexEntry() [handle=%p, frecency=%s, "
"hasAltData=%s, onStartTime=%s, onStopTime=%s, contentType=%s]",
aHandle, aFrecency ? nsPrintfCString("%u", *aFrecency).get() : "",
aHasAltData ? (*aHasAltData ? "true" : "false") : "",
aOnStartTime ? nsPrintfCString("%u", *aOnStartTime).get() : "",
aOnStopTime ? nsPrintfCString("%u", *aOnStopTime).get() : "",
aContentType ? nsPrintfCString("%u", *aContentType).get() : ""));
nsresult rv;
RefPtr<CacheFileIOManager> ioMan = gInstance;
if (aHandle->IsClosed() || !ioMan) {
return NS_ERROR_NOT_INITIALIZED;
}
if (aHandle->IsSpecialFile()) {
return NS_ERROR_UNEXPECTED;
}
RefPtr<UpdateIndexEntryEvent> ev = new UpdateIndexEntryEvent(
aHandle, aFrecency, aHasAltData, aOnStartTime, aOnStopTime, aContentType);
rv = ioMan->mIOThread->Dispatch(ev, aHandle->mPriority
? CacheIOThread::WRITE_PRIORITY
: CacheIOThread::WRITE);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult CacheFileIOManager::CreateFile(CacheFileHandle* aHandle) {
MOZ_ASSERT(!aHandle->mFD);
MOZ_ASSERT(aHandle->mFile);
nsresult rv;
if (aHandle->IsDoomed()) {
nsCOMPtr<nsIFile> file;
rv = GetDoomedFile(getter_AddRefs(file));
NS_ENSURE_SUCCESS(rv, rv);
aHandle->mFile.swap(file);
} else {
bool exists;
if (NS_SUCCEEDED(aHandle->mFile->Exists(&exists)) && exists) {
NS_WARNING("Found a file that should not exist!");
}
}
rv = OpenNSPRHandle(aHandle, true);
NS_ENSURE_SUCCESS(rv, rv);
aHandle->mFileSize = 0;
return NS_OK;
}
// static
void CacheFileIOManager::HashToStr(const SHA1Sum::Hash* aHash,
nsACString& _retval) {
_retval.Truncate();
const char hexChars[] = {'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
for (uint32_t i = 0; i < sizeof(SHA1Sum::Hash); i++) {
_retval.Append(hexChars[(*aHash)[i] >> 4]);
_retval.Append(hexChars[(*aHash)[i] & 0xF]);
}
}
// static
nsresult CacheFileIOManager::StrToHash(const nsACString& aHash,
SHA1Sum::Hash* _retval) {
if (aHash.Length() != 2 * sizeof(SHA1Sum::Hash)) {
return NS_ERROR_INVALID_ARG;
}
for (uint32_t i = 0; i < aHash.Length(); i++) {
uint8_t value;
if (aHash[i] >= '0' && aHash[i] <= '9') {
value = aHash[i] - '0';
} else if (aHash[i] >= 'A' && aHash[i] <= 'F') {
value = aHash[i] - 'A' + 10;
} else if (aHash[i] >= 'a' && aHash[i] <= 'f') {
value = aHash[i] - 'a' + 10;
} else {
return NS_ERROR_INVALID_ARG;
}
if (i % 2 == 0) {
(reinterpret_cast<uint8_t*>(_retval))[i / 2] = value << 4;
} else {
(reinterpret_cast<uint8_t*>(_retval))[i / 2] += value;
}
}
return NS_OK;
}
nsresult CacheFileIOManager::GetFile(const SHA1Sum::Hash* aHash,
nsIFile** _retval) {
nsresult rv;
nsCOMPtr<nsIFile> file;
rv = mCacheDirectory->Clone(getter_AddRefs(file));
NS_ENSURE_SUCCESS(rv, rv);
rv = file->AppendNative(nsLiteralCString(ENTRIES_DIR));
NS_ENSURE_SUCCESS(rv, rv);
nsAutoCString leafName;
HashToStr(aHash, leafName);
rv = file->AppendNative(leafName);
NS_ENSURE_SUCCESS(rv, rv);
file.swap(*_retval);
return NS_OK;
}
nsresult CacheFileIOManager::GetSpecialFile(const nsACString& aKey,
nsIFile** _retval) {
nsresult rv;
nsCOMPtr<nsIFile> file;
rv = mCacheDirectory->Clone(getter_AddRefs(file));
NS_ENSURE_SUCCESS(rv, rv);
rv = file->AppendNative(aKey);
NS_ENSURE_SUCCESS(rv, rv);
file.swap(*_retval);
return NS_OK;
}
nsresult CacheFileIOManager::GetDoomedFile(nsIFile** _retval) {
nsresult rv;
nsCOMPtr<nsIFile> file;
rv = mCacheDirectory->Clone(getter_AddRefs(file));
NS_ENSURE_SUCCESS(rv, rv);
rv = file->AppendNative(nsLiteralCString(DOOMED_DIR));
NS_ENSURE_SUCCESS(rv, rv);
rv = file->AppendNative("dummyleaf"_ns);
NS_ENSURE_SUCCESS(rv, rv);
const int32_t kMaxTries = 64;
srand(static_cast<unsigned>(PR_Now()));
nsAutoCString leafName;
for (int32_t triesCount = 0;; ++triesCount) {
leafName.AppendInt(rand());
rv = file->SetNativeLeafName(leafName);
NS_ENSURE_SUCCESS(rv, rv);
bool exists;
if (NS_SUCCEEDED(file->Exists(&exists)) && !exists) {
break;
}
if (triesCount == kMaxTries) {
LOG(
("CacheFileIOManager::GetDoomedFile() - Could not find unused file "
"name in %d tries.",
kMaxTries));
return NS_ERROR_FAILURE;
}
leafName.Truncate();
}
file.swap(*_retval);
return NS_OK;
}
nsresult CacheFileIOManager::IsEmptyDirectory(nsIFile* aFile, bool* _retval) {
MOZ_ASSERT(mIOThread->IsCurrentThread());
nsresult rv;
nsCOMPtr<nsIDirectoryEnumerator> enumerator;
rv = aFile->GetDirectoryEntries(getter_AddRefs(enumerator));
NS_ENSURE_SUCCESS(rv, rv);
bool hasMoreElements = false;
rv = enumerator->HasMoreElements(&hasMoreElements);
NS_ENSURE_SUCCESS(rv, rv);
*_retval = !hasMoreElements;
return NS_OK;
}
nsresult CacheFileIOManager::CheckAndCreateDir(nsIFile* aFile, const char* aDir,
bool aEnsureEmptyDir) {
nsresult rv;
nsCOMPtr<nsIFile> file;
if (!aDir) {
file = aFile;
} else {
nsAutoCString dir(aDir);
rv = aFile->Clone(getter_AddRefs(file));
NS_ENSURE_SUCCESS(rv, rv);
rv = file->AppendNative(dir);
NS_ENSURE_SUCCESS(rv, rv);
}
bool exists = false;
rv = file->Exists(&exists);
if (NS_SUCCEEDED(rv) && exists) {
bool isDirectory = false;
rv = file->IsDirectory(&isDirectory);
if (NS_FAILED(rv) || !isDirectory) {
// Try to remove the file
rv = file->Remove(false);
if (NS_SUCCEEDED(rv)) {
exists = false;
}
}
NS_ENSURE_SUCCESS(rv, rv);
}
if (aEnsureEmptyDir && NS_SUCCEEDED(rv) && exists) {
bool isEmpty;
rv = IsEmptyDirectory(file, &isEmpty);
NS_ENSURE_SUCCESS(rv, rv);
if (!isEmpty) {
// Don't check the result, if this fails, it's OK. We do this
// only for the doomed directory that doesn't need to be deleted
// for the cost of completely disabling the whole browser.
TrashDirectory(file);
}
}
if (NS_SUCCEEDED(rv) && !exists) {
rv = file->Create(nsIFile::DIRECTORY_TYPE, 0700);
}
if (NS_FAILED(rv)) {
NS_WARNING("Cannot create directory");
return NS_ERROR_FAILURE;
}
return NS_OK;
}
nsresult CacheFileIOManager::CreateCacheTree() {
MOZ_ASSERT(mIOThread->IsCurrentThread());
MOZ_ASSERT(!mTreeCreated);
if (!mCacheDirectory || mTreeCreationFailed) {
return NS_ERROR_FILE_INVALID_PATH;
}
nsresult rv;
// Set the flag here and clear it again below when the tree is created
// successfully.
mTreeCreationFailed = true;
// ensure parent directory exists
nsCOMPtr<nsIFile> parentDir;
rv = mCacheDirectory->GetParent(getter_AddRefs(parentDir));
NS_ENSURE_SUCCESS(rv, rv);
rv = CheckAndCreateDir(parentDir, nullptr, false);
NS_ENSURE_SUCCESS(rv, rv);
// ensure cache directory exists
rv = CheckAndCreateDir(mCacheDirectory, nullptr, false);
NS_ENSURE_SUCCESS(rv, rv);
// ensure entries directory exists
rv = CheckAndCreateDir(mCacheDirectory, ENTRIES_DIR, false);
NS_ENSURE_SUCCESS(rv, rv);
// ensure doomed directory exists
rv = CheckAndCreateDir(mCacheDirectory, DOOMED_DIR, true);
NS_ENSURE_SUCCESS(rv, rv);
mTreeCreated = true;
mTreeCreationFailed = false;
if (!mContextEvictor) {
RefPtr<CacheFileContextEvictor> contextEvictor;
contextEvictor = new CacheFileContextEvictor();
// Init() method will try to load unfinished contexts from the disk. Store
// the evictor as a member only when there is some unfinished job.
contextEvictor->Init(mCacheDirectory);
if (contextEvictor->ContextsCount()) {
contextEvictor.swap(mContextEvictor);
}
}
StartRemovingTrash();
return NS_OK;
}
nsresult CacheFileIOManager::OpenNSPRHandle(CacheFileHandle* aHandle,
bool aCreate) {
LOG(("CacheFileIOManager::OpenNSPRHandle BEGIN, handle=%p", aHandle));
MOZ_ASSERT(CacheFileIOManager::IsOnIOThreadOrCeased());
MOZ_ASSERT(!aHandle->mFD);
MOZ_ASSERT(mHandlesByLastUsed.IndexOf(aHandle) == mHandlesByLastUsed.NoIndex);
MOZ_ASSERT(mHandlesByLastUsed.Length() <= kOpenHandlesLimit);
MOZ_ASSERT((aCreate && !aHandle->mFileExists) ||
(!aCreate && aHandle->mFileExists));
nsresult rv;
if (mHandlesByLastUsed.Length() == kOpenHandlesLimit) {
// close handle that hasn't been used for the longest time
rv = MaybeReleaseNSPRHandleInternal(mHandlesByLastUsed[0], true);
NS_ENSURE_SUCCESS(rv, rv);
}
if (aCreate) {
rv = aHandle->mFile->OpenNSPRFileDesc(
PR_RDWR | PR_CREATE_FILE | PR_TRUNCATE, 0600, &aHandle->mFD);
if (rv == NS_ERROR_FILE_ALREADY_EXISTS || // error from nsLocalFileWin
rv == NS_ERROR_FILE_NO_DEVICE_SPACE) { // error from nsLocalFileUnix
LOG(
("CacheFileIOManager::OpenNSPRHandle() - Cannot create a new file, we"
" might reached a limit on FAT32. Will evict a single entry and try "
"again. [hash=%08x%08x%08x%08x%08x]",
LOGSHA1(aHandle->Hash())));
SHA1Sum::Hash hash;
uint32_t cnt;
rv = CacheIndex::GetEntryForEviction(true, &hash, &cnt);
if (NS_SUCCEEDED(rv)) {
rv = DoomFileByKeyInternal(&hash);
}
if (NS_SUCCEEDED(rv)) {
rv = aHandle->mFile->OpenNSPRFileDesc(
PR_RDWR | PR_CREATE_FILE | PR_TRUNCATE, 0600, &aHandle->mFD);
LOG(
("CacheFileIOManager::OpenNSPRHandle() - Successfully evicted entry"
" with hash %08x%08x%08x%08x%08x. %s to create the new file.",
LOGSHA1(&hash), NS_SUCCEEDED(rv) ? "Succeeded" : "Failed"));
// Report the full size only once per session
static bool sSizeReported = false;
if (!sSizeReported) {
uint32_t cacheUsage;
if (NS_SUCCEEDED(CacheIndex::GetCacheSize(&cacheUsage))) {
cacheUsage >>= 10;
Telemetry::Accumulate(Telemetry::NETWORK_CACHE_SIZE_FULL_FAT,
cacheUsage);
sSizeReported = true;
}
}
} else {
LOG(
("CacheFileIOManager::OpenNSPRHandle() - Couldn't evict an existing"
" entry."));
rv = NS_ERROR_FILE_NO_DEVICE_SPACE;
}
}
if (NS_FAILED(rv)) {
LOG(
("CacheFileIOManager::OpenNSPRHandle() Create failed with "
"0x%08" PRIx32,
static_cast<uint32_t>(rv)));
}
NS_ENSURE_SUCCESS(rv, rv);
aHandle->mFileExists = true;
} else {
rv = aHandle->mFile->OpenNSPRFileDesc(PR_RDWR, 0600, &aHandle->mFD);
if (NS_ERROR_FILE_NOT_FOUND == rv) {
LOG((" file doesn't exists"));
aHandle->mFileExists = false;
return DoomFileInternal(aHandle);
}
if (NS_FAILED(rv)) {
LOG(("CacheFileIOManager::OpenNSPRHandle() Open failed with 0x%08" PRIx32,
static_cast<uint32_t>(rv)));
}
NS_ENSURE_SUCCESS(rv, rv);
}
mHandlesByLastUsed.AppendElement(aHandle);
LOG(("CacheFileIOManager::OpenNSPRHandle END, handle=%p", aHandle));
return NS_OK;
}
void CacheFileIOManager::NSPRHandleUsed(CacheFileHandle* aHandle) {
MOZ_ASSERT(CacheFileIOManager::IsOnIOThreadOrCeased());
MOZ_ASSERT(aHandle->mFD);
DebugOnly<bool> found{};
found = mHandlesByLastUsed.RemoveElement(aHandle);
MOZ_ASSERT(found);
mHandlesByLastUsed.AppendElement(aHandle);
}
nsresult CacheFileIOManager::SyncRemoveDir(nsIFile* aFile, const char* aDir) {
nsresult rv;
nsCOMPtr<nsIFile> file;
if (!aDir) {
file = aFile;
} else {
rv = aFile->Clone(getter_AddRefs(file));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
rv = file->AppendNative(nsDependentCString(aDir));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
if (LOG_ENABLED()) {
LOG(("CacheFileIOManager::SyncRemoveDir() - Removing directory %s",
file->HumanReadablePath().get()));
}
rv = file->Remove(true);
if (NS_WARN_IF(NS_FAILED(rv))) {
LOG(
("CacheFileIOManager::SyncRemoveDir() - Removing failed! "
"[rv=0x%08" PRIx32 "]",
static_cast<uint32_t>(rv)));
}
return rv;
}
nsresult CacheFileIOManager::DispatchPurgeTask(
const nsCString& aCacheDirName, const nsCString& aSecondsToWait,
const nsCString& aPurgeExtension) {
nsresult rv;
#if !defined(MOZ_BACKGROUNDTASKS)
// If background tasks are disabled, then we should just bail out early.
return NS_ERROR_NOT_IMPLEMENTED;
#endif
nsCOMPtr<nsIFile> cacheDir;
rv = mCacheDirectory->Clone(getter_AddRefs(cacheDir));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIFile> profileDir;
rv = cacheDir->GetParent(getter_AddRefs(profileDir));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIFile> lf;
rv = XRE_GetBinaryPath(getter_AddRefs(lf));
NS_ENSURE_SUCCESS(rv, rv);
nsAutoCString exePath;
#if !defined(XP_WIN)
rv = lf->GetNativePath(exePath);
#else
rv = lf->GetNativeTarget(exePath);
#endif
NS_ENSURE_SUCCESS(rv, rv);
nsAutoCString path;
#if !defined(XP_WIN)
rv = profileDir->GetNativePath(path);
#else
rv = profileDir->GetNativeTarget(path);
#endif
NS_ENSURE_SUCCESS(rv, rv);
const char* const argv[] = {exePath.get(), "--backgroundtask",
"purgeHTTPCache", path.get(),
aCacheDirName.get(), aSecondsToWait.get(),
aPurgeExtension.get(), nullptr};
if (NS_WARN_IF(PR_FAILURE == PR_CreateProcessDetached(exePath.get(),
(char* const*)argv,
nullptr, nullptr))) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
void CacheFileIOManager::SyncRemoveAllCacheFiles() {
LOG(("CacheFileIOManager::SyncRemoveAllCacheFiles()"));
nsresult rv;
if (StaticPrefs::network_cache_shutdown_purge_in_background_task()) {
rv = [&]() -> nsresult {
nsresult rv;
nsAutoCString leafName;
rv = mCacheDirectory->GetNativeLeafName(leafName);
NS_ENSURE_SUCCESS(rv, rv);
leafName.Append('.');
PRExplodedTime now;
PR_ExplodeTime(PR_Now(), PR_GMTParameters, &now);
leafName.Append(nsPrintfCString(
"%04d-%02d-%02d-%02d-%02d-%02d", now.tm_year, now.tm_month + 1,
now.tm_mday, now.tm_hour, now.tm_min, now.tm_sec));
leafName.Append(kPurgeExtension);
nsAutoCString secondsToWait;
secondsToWait.AppendInt(
StaticPrefs::network_cache_shutdown_purge_folder_wait_seconds());
rv = DispatchPurgeTask(leafName, secondsToWait, kPurgeExtension);
NS_ENSURE_SUCCESS(rv, rv);
rv = mCacheDirectory->RenameToNative(nullptr, leafName);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}();
// Dispatching to the background task has succeeded. This is finished.
if (NS_SUCCEEDED(rv)) {
return;
}
}
SyncRemoveDir(mCacheDirectory, ENTRIES_DIR);
SyncRemoveDir(mCacheDirectory, DOOMED_DIR);
// Clear any intermediate state of trash dir enumeration.
mFailedTrashDirs.Clear();
mTrashDir = nullptr;
while (true) {
// FindTrashDirToRemove() fills mTrashDir if there is any trash directory.
rv = FindTrashDirToRemove();
if (rv == NS_ERROR_NOT_AVAILABLE) {
LOG(
("CacheFileIOManager::SyncRemoveAllCacheFiles() - No trash directory "
"found."));
break;
}
if (NS_WARN_IF(NS_FAILED(rv))) {
LOG(
("CacheFileIOManager::SyncRemoveAllCacheFiles() - "
"FindTrashDirToRemove() returned an unexpected error. "
"[rv=0x%08" PRIx32 "]",
static_cast<uint32_t>(rv)));
break;
}
rv = SyncRemoveDir(mTrashDir, nullptr);
if (NS_FAILED(rv)) {
nsAutoCString leafName;
mTrashDir->GetNativeLeafName(leafName);
mFailedTrashDirs.AppendElement(leafName);
}
}
}
// Returns default ("smart") size (in KB) of cache, given available disk space
// (also in KB)
static uint32_t SmartCacheSize(const int64_t availKB) {
uint32_t maxSize;
if (CacheObserver::ClearCacheOnShutdown()) {
maxSize = kMaxClearOnShutdownCacheSizeKB;
} else {
maxSize = kMaxCacheSizeKB;
}
if (availKB > 25 * 1024 * 1024) {
return maxSize; // skip computing if we're over 25 GB
}
// Grow/shrink in 10 MB units, deliberately, so that in the common case we
// don't shrink cache and evict items every time we startup (it's important
// that we don't slow down startup benchmarks).
uint32_t sz10MBs = 0;
uint32_t avail10MBs = availKB / (1024 * 10);
// 2.5% of space above 7GB
if (avail10MBs > 700) {
sz10MBs += static_cast<uint32_t>((avail10MBs - 700) * .025);
avail10MBs = 700;
}
// 7.5% of space between 500 MB -> 7 GB
if (avail10MBs > 50) {
sz10MBs += static_cast<uint32_t>((avail10MBs - 50) * .075);
avail10MBs = 50;
}
#ifdef ANDROID
// On Android, smaller/older devices may have very little storage and
// device owners may be sensitive to storage footprint: Use a smaller
// percentage of available space and a smaller minimum.
// 16% of space up to 500 MB (10 MB min)
sz10MBs += std::max<uint32_t>(1, static_cast<uint32_t>(avail10MBs * .16));
#else
// 30% of space up to 500 MB (50 MB min)
sz10MBs += std::max<uint32_t>(5, static_cast<uint32_t>(avail10MBs * .3));
#endif
return std::min<uint32_t>(maxSize, sz10MBs * 10 * 1024);
}
nsresult CacheFileIOManager::UpdateSmartCacheSize(int64_t aFreeSpace) {
MOZ_ASSERT(mIOThread->IsCurrentThread());
nsresult rv;
if (!CacheObserver::SmartCacheSizeEnabled()) {
return NS_ERROR_NOT_AVAILABLE;
}
// Wait at least kSmartSizeUpdateInterval before recomputing smart size.
static const TimeDuration kUpdateLimit =
TimeDuration::FromMilliseconds(kSmartSizeUpdateInterval);
if (!mLastSmartSizeTime.IsNull() &&
(TimeStamp::NowLoRes() - mLastSmartSizeTime) < kUpdateLimit) {
return NS_OK;
}
// Do not compute smart size when cache size is not reliable.
bool isUpToDate = false;
CacheIndex::IsUpToDate(&isUpToDate);
if (!isUpToDate) {
return NS_ERROR_NOT_AVAILABLE;
}
uint32_t cacheUsage;
rv = CacheIndex::GetCacheSize(&cacheUsage);
if (NS_WARN_IF(NS_FAILED(rv))) {
LOG(
("CacheFileIOManager::UpdateSmartCacheSize() - Cannot get cacheUsage! "
"[rv=0x%08" PRIx32 "]",
static_cast<uint32_t>(rv)));
return rv;
}
mLastSmartSizeTime = TimeStamp::NowLoRes();
uint32_t smartSize = SmartCacheSize(aFreeSpace + cacheUsage);
if (smartSize == CacheObserver::DiskCacheCapacity()) {
// Smart size has not changed.
return NS_OK;
}
CacheObserver::SetSmartDiskCacheCapacity(smartSize);
return NS_OK;
}
// Memory reporting
namespace {
// A helper class that dispatches and waits for an event that gets result of
// CacheFileIOManager->mHandles.SizeOfExcludingThis() on the I/O thread
// to safely get handles memory report.
// We must do this, since the handle list is only accessed and managed w/o
// locking on the I/O thread. That is by design.
class SizeOfHandlesRunnable : public Runnable {
public:
SizeOfHandlesRunnable(mozilla::MallocSizeOf mallocSizeOf,
CacheFileHandles const& handles,
nsTArray<CacheFileHandle*> const& specialHandles)
: Runnable("net::SizeOfHandlesRunnable"),
mMonitor("SizeOfHandlesRunnable.mMonitor"),
mMonitorNotified(false),
mMallocSizeOf(mallocSizeOf),
mHandles(handles),
mSpecialHandles(specialHandles),
mSize(0) {}
size_t Get(CacheIOThread* thread) {
nsCOMPtr<nsIEventTarget> target = thread->Target();
if (!target) {
NS_ERROR("If we have the I/O thread we also must have the I/O target");
return 0;
}
mozilla::MonitorAutoLock mon(mMonitor);
mMonitorNotified = false;
nsresult rv = target->Dispatch(this, nsIEventTarget::DISPATCH_NORMAL);
if (NS_FAILED(rv)) {
NS_ERROR("Dispatch failed, cannot do memory report of CacheFileHandles");
return 0;
}
while (!mMonitorNotified) {
mon.Wait();
}
return mSize;
}
NS_IMETHOD Run() override {
mozilla::MonitorAutoLock mon(mMonitor);
// Excluding this since the object itself is a member of CacheFileIOManager
// reported in CacheFileIOManager::SizeOfIncludingThis as part of |this|.
mSize = mHandles.SizeOfExcludingThis(mMallocSizeOf);
for (uint32_t i = 0; i < mSpecialHandles.Length(); ++i) {
mSize += mSpecialHandles[i]->SizeOfIncludingThis(mMallocSizeOf);
}
mMonitorNotified = true;
mon.Notify();
return NS_OK;
}
private:
mozilla::Monitor mMonitor MOZ_UNANNOTATED;
bool mMonitorNotified;
mozilla::MallocSizeOf mMallocSizeOf;
CacheFileHandles const& mHandles;
nsTArray<CacheFileHandle*> const& mSpecialHandles;
size_t mSize;
};
} // namespace
size_t CacheFileIOManager::SizeOfExcludingThisInternal(
mozilla::MallocSizeOf mallocSizeOf) const {
size_t n = 0;
nsCOMPtr<nsISizeOf> sizeOf;
if (mIOThread) {
n += mIOThread->SizeOfIncludingThis(mallocSizeOf);
// mHandles and mSpecialHandles must be accessed only on the I/O thread,
// must sync dispatch.
RefPtr<SizeOfHandlesRunnable> sizeOfHandlesRunnable =
new SizeOfHandlesRunnable(mallocSizeOf, mHandles, mSpecialHandles);
n += sizeOfHandlesRunnable->Get(mIOThread);
}
// mHandlesByLastUsed just refers handles reported by mHandles.
sizeOf = do_QueryInterface(mCacheDirectory);
if (sizeOf) n += sizeOf->SizeOfIncludingThis(mallocSizeOf);
sizeOf = do_QueryInterface(mMetadataWritesTimer);
if (sizeOf) n += sizeOf->SizeOfIncludingThis(mallocSizeOf);
sizeOf = do_QueryInterface(mTrashTimer);
if (sizeOf) n += sizeOf->SizeOfIncludingThis(mallocSizeOf);
sizeOf = do_QueryInterface(mTrashDir);
if (sizeOf) n += sizeOf->SizeOfIncludingThis(mallocSizeOf);
for (uint32_t i = 0; i < mFailedTrashDirs.Length(); ++i) {
n += mFailedTrashDirs[i].SizeOfExcludingThisIfUnshared(mallocSizeOf);
}
return n;
}
// static
size_t CacheFileIOManager::SizeOfExcludingThis(
mozilla::MallocSizeOf mallocSizeOf) {
if (!gInstance) return 0;
return gInstance->SizeOfExcludingThisInternal(mallocSizeOf);
}
// static
size_t CacheFileIOManager::SizeOfIncludingThis(
mozilla::MallocSizeOf mallocSizeOf) {
return mallocSizeOf(gInstance) + SizeOfExcludingThis(mallocSizeOf);
}
} // namespace mozilla::net
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