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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 "CacheLog.h"
#include "CacheFileIOManager.h"
#include "../cache/nsCacheUtils.h"
#include "CacheHashUtils.h"
#include "CacheStorageService.h"
#include "CacheIndex.h"
#include "CacheFileUtils.h"
#include "nsThreadUtils.h"
#include "CacheFile.h"
#include "CacheObserver.h"
#include "nsIFile.h"
#include "CacheFileContextEvictor.h"
#include "nsITimer.h"
#include "nsISimpleEnumerator.h"
#include "nsIDirectoryEnumerator.h"
#include "nsIObserverService.h"
#include "nsICacheStorageVisitor.h"
#include "nsISizeOf.h"
#include "mozilla/Telemetry.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/Services.h"
#include "nsDirectoryServiceUtils.h"
#include "nsAppDirectoryServiceDefs.h"
#include "private/pprio.h"
#include "mozilla/IntegerPrintfMacros.h"
#include "mozilla/Preferences.h"
#include "nsNetUtil.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 {
namespace net {
#define kOpenHandlesLimit 128
#define kMetadataWriteDelay 5000
#define kRemoveTrashStartDelay 60000 // in milliseconds
#define kSmartSizeUpdateInterval 60000 // in milliseconds
#ifdef ANDROID
const uint32_t kMaxCacheSizeKB = 200*1024; // 200 MB
#else
const uint32_t kMaxCacheSizeKB = 350*1024; // 350 MB
#endif
bool
CacheFileHandle::DispatchRelease()
{
if (CacheFileIOManager::IsOnIOThreadOrCeased()) {
return false;
}
nsCOMPtr<nsIEventTarget> ioTarget = CacheFileIOManager::IOTarget();
if (!ioTarget) {
return false;
}
nsresult rv =
ioTarget->Dispatch(NewNonOwningRunnableMethod(this,
&CacheFileHandle::Release),
nsIEventTarget::DISPATCH_NORMAL);
if (NS_FAILED(rv)) {
return false;
}
return true;
}
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()));
NS_PRECONDITION(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_THREADSAFE
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), 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), 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;
}
nsresult
CacheFileHandles::NewHandle(const SHA1Sum::Hash *aHash,
bool aPriority, CacheFileHandle::PinningStatus aPinning,
CacheFileHandle **_retval)
{
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));
handle.forget(_retval);
return NS_OK;
}
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->Hash());
}
}
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()
: mMonitor("ShutdownEvent.mMonitor")
, mNotified(false)
{
}
protected:
~ShutdownEvent()
{
}
public:
NS_IMETHOD Run() override
{
MonitorAutoLock mon(mMonitor);
CacheFileIOManager::gInstance->ShutdownInternal();
mNotified = true;
mon.Notify();
return NS_OK;
}
void PostAndWait()
{
MonitorAutoLock mon(mMonitor);
DebugOnly<nsresult> rv;
rv = CacheFileIOManager::gInstance->mIOThread->Dispatch(
this, CacheIOThread::WRITE); // When writes and closing of handles is done
MOZ_ASSERT(NS_SUCCEEDED(rv));
PRIntervalTime const waitTime = PR_MillisecondsToInterval(1000);
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;
bool mNotified;
};
class OpenFileEvent : public Runnable {
public:
OpenFileEvent(const nsACString &aKey, uint32_t aFlags,
CacheFileIOListener *aCallback)
: mFlags(aFlags)
, mCallback(aCallback)
, mKey(aKey)
{
mIOMan = CacheFileIOManager::gInstance;
}
protected:
~OpenFileEvent()
{
}
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));
}
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:
ReadEvent(CacheFileHandle *aHandle, int64_t aOffset, char *aBuf,
int32_t aCount, CacheFileIOListener *aCallback)
: mHandle(aHandle)
, mOffset(aOffset)
, mBuf(aBuf)
, mCount(aCount)
, mCallback(aCallback)
{
}
protected:
~ReadEvent()
{
}
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);
}
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:
WriteEvent(CacheFileHandle *aHandle, int64_t aOffset, const char *aBuf,
int32_t aCount, bool aValidate, bool aTruncate,
CacheFileIOListener *aCallback)
: mHandle(aHandle)
, mOffset(aOffset)
, mBuf(aBuf)
, mCount(aCount)
, mValidate(aValidate)
, mTruncate(aTruncate)
, mCallback(aCallback)
{
}
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_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)
: mCallback(aCallback)
, mHandle(aHandle)
{
}
protected:
~DoomFileEvent()
{
}
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)
: mCallback(aCallback)
{
SHA1Sum sum;
sum.update(aKey.BeginReading(), aKey.Length());
sum.finish(mHash);
mIOMan = CacheFileIOManager::gInstance;
}
protected:
~DoomFileByKeyEvent()
{
}
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)
: mHandle(aHandle)
{
}
protected:
~ReleaseNSPRHandleEvent()
{
}
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)
: mHandle(aHandle)
, mTruncatePos(aTruncatePos)
, mEOFPos(aEOFPos)
, mCallback(aCallback)
{
}
protected:
~TruncateSeekSetEOFEvent()
{
}
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)
: mHandle(aHandle)
, mNewName(aNewName)
, mCallback(aCallback)
{
}
protected:
~RenameFileEvent()
{
}
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)
: mHandle(aHandle)
, mOriginAttrsHash(aOriginAttrsHash)
, mAnonymous(aAnonymous)
, mPinning(aPinning)
{
}
protected:
~InitIndexEntryEvent()
{
}
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 and expiration time 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 uint32_t *aExpirationTime,
const bool *aHasAltData,
const uint16_t *aOnStartTime,
const uint16_t *aOnStopTime)
: mHandle(aHandle)
, mHasFrecency(false)
, mHasExpirationTime(false)
, mHasHasAltData(false)
, mHasOnStartTime(false)
, mHasOnStopTime(false)
{
if (aFrecency) {
mHasFrecency = true;
mFrecency = *aFrecency;
}
if (aExpirationTime) {
mHasExpirationTime = true;
mExpirationTime = *aExpirationTime;
}
if (aHasAltData) {
mHasHasAltData = true;
mHasAltData = *aHasAltData;
}
if (aOnStartTime) {
mHasOnStartTime = true;
mOnStartTime = *aOnStartTime;
}
if (aOnStopTime) {
mHasOnStopTime = true;
mOnStopTime = *aOnStopTime;
}
}
protected:
~UpdateIndexEntryEvent()
{
}
public:
NS_IMETHOD Run() override
{
if (mHandle->IsClosed() || mHandle->IsDoomed()) {
return NS_OK;
}
CacheIndex::UpdateEntry(mHandle->Hash(),
mHasFrecency ? &mFrecency : nullptr,
mHasExpirationTime ? &mExpirationTime : nullptr,
mHasHasAltData ? &mHasAltData : nullptr,
mHasOnStartTime ? &mOnStartTime : nullptr,
mHasOnStopTime ? &mOnStopTime : nullptr,
nullptr);
return NS_OK;
}
protected:
RefPtr<CacheFileHandle> mHandle;
bool mHasFrecency;
bool mHasExpirationTime;
bool mHasHasAltData;
bool mHasOnStartTime;
bool mHasOnStopTime;
uint32_t mFrecency;
uint32_t mExpirationTime;
bool mHasAltData;
uint16_t mOnStartTime;
uint16_t mOnStopTime;
};
class MetadataWriteScheduleEvent : public Runnable
{
public:
enum EMode {
SCHEDULE,
UNSCHEDULE,
SHUTDOWN
} mMode;
RefPtr<CacheFile> mFile;
RefPtr<CacheFileIOManager> mIOMan;
MetadataWriteScheduleEvent(CacheFileIOManager * aManager,
CacheFile * aFile,
EMode aMode)
: mMode(aMode)
, mFile(aFile)
, mIOMan(aManager)
{ }
virtual ~MetadataWriteScheduleEvent() { }
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)
CacheFileIOManager::CacheFileIOManager()
: mShuttingDown(false)
, mTreeCreated(false)
, mTreeCreationFailed(false)
, mOverLimitEvicting(false)
, mCacheSizeOnHardLimit(false)
, mRemovingTrashDirs(false)
{
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 = ioMan.forget();
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;
}
nsresult
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;
// 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;
}
return NS_OK;
}
// 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(NS_LITERAL_STRING("cache2"));
NS_ENSURE_SUCCESS(rv, rv);
}
// All functions return a clone.
ioMan->mCacheDirectory.swap(directory);
#if defined(MOZ_WIDGET_ANDROID)
if (profilelessDirectory) {
rv = profilelessDirectory->Append(NS_LITERAL_STRING("cache2"));
NS_ENSURE_SUCCESS(rv, rv);
}
ioMan->mCacheProfilelessDirectory.swap(profilelessDirectory);
#endif
if (ioMan->mCacheDirectory) {
CacheIndex::Init(ioMan->mCacheDirectory);
}
return NS_OK;
}
// 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) {
mMetadataWritesTimer = do_CreateInstance("@mozilla.org/timer;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = mMetadataWritesTimer->InitWithCallback(
this, kMetadataWriteDelay, nsITimer::TYPE_ONE_SHOT);
NS_ENSURE_SUCCESS(rv, rv);
}
if (mScheduledMetadataWrites.IndexOf(aFile) !=
mScheduledMetadataWrites.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);
}
nsresult
CacheFileIOManager::UnscheduleMetadataWriteInternal(CacheFile * aFile)
{
MOZ_ASSERT(IsOnIOThreadOrCeased());
mScheduledMetadataWrites.RemoveElement(aFile);
if (mScheduledMetadataWrites.Length() == 0 &&
mMetadataWritesTimer) {
mMetadataWritesTimer->Cancel();
mMetadataWritesTimer = nullptr;
}
return NS_OK;
}
// 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);
}
nsresult
CacheFileIOManager::ShutdownMetadataWriteSchedulingInternal()
{
MOZ_ASSERT(IsOnIOThreadOrCeased());
nsTArray<RefPtr<CacheFile> > files;
files.SwapElements(mScheduledMetadataWrites);
for (uint32_t i = 0; i < files.Length(); ++i) {
CacheFile * file = files[i];
file->WriteMetadataIfNeeded();
}
if (mMetadataWritesTimer) {
mMetadataWritesTimer->Cancel();
mMetadataWritesTimer = nullptr;
}
return NS_OK;
}
NS_IMETHODIMP
CacheFileIOManager::Notify(nsITimer * aTimer)
{
MOZ_ASSERT(IsOnIOThreadOrCeased());
MOZ_ASSERT(mMetadataWritesTimer == aTimer);
mMetadataWritesTimer = nullptr;
nsTArray<RefPtr<CacheFile> > files;
files.SwapElements(mScheduledMetadataWrites);
for (uint32_t i = 0; i < files.Length(); ++i) {
CacheFile * file = files[i];
file->WriteMetadataIfNeeded();
}
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;
}
rv = mHandles.NewHandle(aHash, aFlags & PRIORITY, pinning, getter_AddRefs(handle));
NS_ENSURE_SUCCESS(rv, rv);
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;
}
rv = mHandles.NewHandle(aHash, aFlags & PRIORITY, pinning, getter_AddRefs(handle));
NS_ENSURE_SUCCESS(rv, rv);
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));
}
rv = file->GetFileSize(&handle->mFileSize);
NS_ENSURE_SUCCESS(rv, rv);
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) {
rv = file->GetFileSize(&handle->mFileSize);
NS_ENSURE_SUCCESS(rv, rv);
handle->mFileExists = true;
} else {
handle->mFileSize = 0;
}
handle->mFile.swap(file);
handle.swap(*_retval);
return NS_OK;
}
nsresult
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);
}
}
return NS_OK;
}
// 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_DISK_FULL;
}
int64_t freeSpace = -1;
rv = mCacheDirectory->GetDiskSpaceAvailable(&freeSpace);
if (NS_WARN_IF(NS_FAILED(rv))) {
LOG(("CacheFileIOManager::WriteInternal() - GetDiskSpaceAvailable() "
"failed! [rv=0x%08" PRIx32 "]", static_cast<uint32_t>(rv)));
} else {
uint32_t limit = CacheObserver::DiskFreeSpaceHardLimit();
if (freeSpace - aOffset - aCount + aHandle->mFileSize < limit) {
LOG(("CacheFileIOManager::WriteInternal() - Low free space, refusing "
"to write! [freeSpace=%" PRId64 ", limit=%u]", freeSpace, limit));
return NS_ERROR_FILE_DISK_FULL;
}
}
}
// 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();
}
}
}
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 || NS_ERROR_FILE_TARGET_DOES_NOT_EXIST == 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.
nsAutoCString key;
metadata->GetKey(key);
RefPtr<nsILoadContextInfo> info =
CacheFileUtils::ParseKey(key, &enhanceId, &uriSpec);
MOZ_ASSERT(info);
if (!info) {
return NS_OK;
}
// Pick all data to pass to the callback.
int64_t dataSize = metadata->Offset();
uint32_t fetchCount;
if (NS_FAILED(metadata->GetFetchCount(&fetchCount))) {
fetchCount = 0;
}
uint32_t expirationTime;
if (NS_FAILED(metadata->GetExpirationTime(&expirationTime))) {
expirationTime = 0;
}
uint32_t lastModified;
if (NS_FAILED(metadata->GetLastModified(&lastModified))) {
lastModified = 0;
}
// Call directly on the callback.
aCallback->OnEntryInfo(uriSpec, enhanceId, dataSize, 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_DISK_FULL;
}
int64_t freeSpace = -1;
rv = mCacheDirectory->GetDiskSpaceAvailable(&freeSpace);
if (NS_WARN_IF(NS_FAILED(rv))) {
LOG(("CacheFileIOManager::TruncateSeekSetEOFInternal() - "
"GetDiskSpaceAvailable() failed! [rv=0x%08" PRIx32 "]",
static_cast<uint32_t>(rv)));
} else {
uint32_t limit = CacheObserver::DiskFreeSpaceHardLimit();
if (freeSpace - aEOFPos + aHandle->mFileSize < limit) {
LOG(("CacheFileIOManager::TruncateSeekSetEOFInternal() - Low free space"
", refusing to write! [freeSpace=%" PRId64 ", limit=%u]", freeSpace,
limit));
return NS_ERROR_FILE_DISK_FULL;
}
}
}
// 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(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 {
UpdateSmartCacheSize(freeSpace);
}
uint32_t cacheUsage;
rv = CacheIndex::GetCacheSize(&cacheUsage);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t cacheLimit = CacheObserver::DiskCacheCapacity() >> 10;
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 ", freeSpaceLimit=%u]", cacheUsage, cacheLimit,
freeSpace, freeSpaceLimit));
return NS_OK;
}
LOG(("CacheFileIOManager::EvictIfOverLimitInternal() - Cache size exceeded "
"limit. Starting overlimit eviction. [cacheSize=%u, limit=%u]",
cacheUsage, cacheLimit));
nsCOMPtr<nsIRunnable> ev;
ev = NewRunnableMethod(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 = -1;
rv = mCacheDirectory->GetDiskSpaceAvailable(&freeSpace);
if (NS_WARN_IF(NS_FAILED(rv))) {
// Do not change smart size.
LOG(("CacheFileIOManager::EvictIfOverLimitInternal() - "
"GetDiskSpaceAvailable() failed! [rv=0x%08" PRIx32 "]",
static_cast<uint32_t>(rv)));
} else {
UpdateSmartCacheSize(freeSpace);
}
uint32_t cacheUsage;
rv = CacheIndex::GetCacheSize(&cacheUsage);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t cacheLimit = CacheObserver::DiskCacheCapacity() >> 10;
uint32_t freeSpaceLimit = CacheObserver::DiskFreeSpaceSoftLimit();
if (cacheUsage > cacheLimit) {
LOG(("CacheFileIOManager::OverLimitEvictionInternal() - Cache size over "
"limit. [cacheSize=%u, limit=%u]", 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 ", freeSpaceLimit=%u]", freeSpace,
freeSpaceLimit));
} else {
LOG(("CacheFileIOManager::OverLimitEvictionInternal() - Cache size and "
"free space in limits. [cacheSize=%ukB, cacheSizeLimit=%ukB, "
"freeSpace=%" PRId64 ", freeSpaceLimit=%u]", 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;
uint32_t expTime = nsICacheEntry::NO_EXPIRATION_TIME;
rv = CacheIndex::UpdateEntry(&hash, &frecency, &expTime, 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;
}
}
}
NS_NOTREACHED("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(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:
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(NS_LITERAL_CSTRING(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)
{
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>
(ioMan, &CacheFileIOManager::EvictByContextInternal, aLoadContextInfo, aPinned);
rv = ioMan->mIOThread->DispatchAfterPendingOpens(ev);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
nsresult
CacheFileIOManager::EvictByContextInternal(nsILoadContextInfo *aLoadContextInfo, bool aPinned)
{
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;
}
}
// 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];
if (aLoadContextInfo) {
bool equals;
rv = CacheFileUtils::KeyMatchesLoadContextInfo(handle->Key(),
aLoadContextInfo,
&equals);
if (NS_FAILED(rv)) {
LOG(("CacheFileIOManager::EvictByContextInternal() - Cannot parse key in "
"handle! [handle=%p, key=%s]", handle, handle->Key().get()));
MOZ_CRASH("Unexpected error!");
}
if (!equals) {
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);
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;
ev = NewRunnableMethod(
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;
}
nsresult
CacheFileIOManager::CacheIndexStateChangedInternal()
{
if (mShuttingDown) {
// ignore notification during shutdown
return NS_OK;
}
if (!mContextEvictor) {
return NS_OK;
}
mContextEvictor->CacheIndexStateChanged();
return NS_OK;
}
nsresult
CacheFileIOManager::TrashDirectory(nsIFile *aFile)
{
nsAutoCString path;
aFile->GetNativePath(path);
LOG(("CacheFileIOManager::TrashDirectory() [file=%s]", path.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<nsITimer> timer = do_CreateInstance("@mozilla.org/timer;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIEventTarget> ioTarget = IOTarget();
MOZ_ASSERT(ioTarget);
rv = timer->SetTarget(ioTarget);
NS_ENSURE_SUCCESS(rv, rv);
rv = timer->InitWithFuncCallback(CacheFileIOManager::OnTrashTimer, nullptr,
kRemoveTrashStartDelay - elapsed,
nsITimer::TYPE_ONE_SHOT);
NS_ENSURE_SUCCESS(rv, rv);
mTrashTimer.swap(timer);
return NS_OK;
}
nsCOMPtr<nsIRunnable> ev;
ev = NewRunnableMethod(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);
nsCOMPtr<nsISimpleEnumerator> enumerator;
rv = mTrashDir->GetDirectoryEntries(getter_AddRefs(enumerator));
if (NS_SUCCEEDED(rv)) {
mTrashDirEnumerator = do_QueryInterface(enumerator, &rv);
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
} else {
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()) {
nsAutoCString path;
file->GetNativePath(path);
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]", path.get()));
}
}
file->Remove(isDir);
}
}
NS_NOTREACHED("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<nsISimpleEnumerator> iter;
rv = mCacheDirectory->GetDirectoryEntries(getter_AddRefs(iter));
NS_ENSURE_SUCCESS(rv, rv);
bool more;
nsCOMPtr<nsISupports> elem;
while (NS_SUCCEEDED(iter->HasMoreElements(&more)) && more) {
rv = iter->GetNext(getter_AddRefs(elem));
if (NS_FAILED(rv)) {
continue;
}
nsCOMPtr<nsIFile> file = do_QueryInterface(elem);
if (!file) {
continue;
}
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, NS_LITERAL_CSTRING(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 uint32_t *aExpirationTime,
const bool *aHasAltData,
const uint16_t *aOnStartTime,
const uint16_t *aOnStopTime)
{
LOG(("CacheFileIOManager::UpdateIndexEntry() [handle=%p, frecency=%s, "
"expirationTime=%s, hasAltData=%s, onStartTime=%s, onStopTime=%s]", aHandle,
aFrecency ? nsPrintfCString("%u", *aFrecency).get() : "",
aExpirationTime ? nsPrintfCString("%u", *aExpirationTime).get() : "",
aHasAltData ? (*aHasAltData ? "true" : "false") : "",
aOnStartTime ? nsPrintfCString("%u", *aOnStartTime).get() : "",
aOnStopTime ? nsPrintfCString("%u", *aOnStopTime).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, aExpirationTime, aHasAltData,
aOnStartTime, aOnStopTime);
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(NS_LITERAL_CSTRING(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(NS_LITERAL_CSTRING(DOOMED_DIR));
NS_ENSURE_SUCCESS(rv, rv);
rv = file->AppendNative(NS_LITERAL_CSTRING("dummyleaf"));
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<nsISimpleEnumerator> 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();
if (!CacheObserver::CacheFSReported()) {
uint32_t fsType = 4; // Other OS
#ifdef XP_WIN
nsAutoString target;
nsresult rv = mCacheDirectory->GetTarget(target);
if (NS_FAILED(rv)) {
return NS_OK;
}
wchar_t volume_path[MAX_PATH + 1] = { 0 };
if (!::GetVolumePathNameW(target.get(),
volume_path,
mozilla::ArrayLength(volume_path))) {
return NS_OK;
}
wchar_t fsName[6] = { 0 };
if (!::GetVolumeInformationW(volume_path, nullptr, 0, nullptr, nullptr,
nullptr, fsName,
mozilla::ArrayLength(fsName))) {
return NS_OK;
}
if (wcscmp(fsName, L"NTFS") == 0) {
fsType = 0;
} else if (wcscmp(fsName, L"FAT32") == 0) {
fsType = 1;
} else if (wcscmp(fsName, L"FAT") == 0) {
fsType = 2;
} else {
fsType = 3;
}
#endif
Telemetry::Accumulate(Telemetry::NETWORK_CACHE_FS_TYPE, fsType);
CacheObserver::SetCacheFSReported();
}
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()) {
nsAutoCString path;
file->GetNativePath(path);
LOG(("CacheFileIOManager::SyncRemoveDir() - Removing directory %s",
path.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;
}
void
CacheFileIOManager::SyncRemoveAllCacheFiles()
{
LOG(("CacheFileIOManager::SyncRemoveAllCacheFiles()"));
nsresult rv;
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 uint32_t availKB)
{
uint32_t maxSize = kMaxCacheSizeKB;
if (availKB > 100 * 1024 * 1024) {
return maxSize; // skip computing if we're over 100 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);
// .5% of space above 25 GB
if (avail10MBs > 2500) {
sz10MBs += static_cast<uint32_t>((avail10MBs - 2500)*.005);
avail10MBs = 2500;
}
// 1% of space between 7GB -> 25 GB
if (avail10MBs > 700) {
sz10MBs += static_cast<uint32_t>((avail10MBs - 700)*.01);
avail10MBs = 700;
}
// 5% of space between 500 MB -> 7 GB
if (avail10MBs > 50) {
sz10MBs += static_cast<uint32_t>((avail10MBs - 50)*.05);
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.
// 20% of space up to 500 MB (10 MB min)
sz10MBs += std::max<uint32_t>(1, static_cast<uint32_t>(avail10MBs * .2));
#else
// 40% of space up to 500 MB (50 MB min)
sz10MBs += std::max<uint32_t>(5, static_cast<uint32_t>(avail10MBs * .4));
#endif
return std::min<uint32_t>(maxSize, sz10MBs * 10 * 1024);
}
nsresult
CacheFileIOManager::UpdateSmartCacheSize(int64_t aFreeSpace)
{
MOZ_ASSERT(mIOThread->IsCurrentThread());
nsresult rv;
if (!CacheObserver::UseNewCache()) {
return NS_ERROR_NOT_AVAILABLE;
}
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(static_cast<uint32_t>(aFreeSpace / 1024) +
cacheUsage);
if (smartSize == (CacheObserver::DiskCacheCapacity() >> 10)) {
// Smart size has not changed.
return NS_OK;
}
CacheObserver::SetDiskCacheCapacity(smartSize << 10);
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)
: mMonitor("SizeOfHandlesRunnable.mMonitor")
, mMallocSizeOf(mallocSizeOf)
, mHandles(handles)
, mSpecialHandles(specialHandles)
{
}
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;
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 net
} // namespace mozilla
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