bool
QuotaObject::MaybeAllocateMoreSpace(int64_t aOffset, int32_t aCount)
{
int64_t end = aOffset + aCount;
QuotaManager* quotaManager = QuotaManager::Get();
NS_ASSERTION(quotaManager, "Shouldn't be null!");
MutexAutoLock lock(quotaManager->mQuotaMutex);
if (mSize >= end || !mOriginInfo) {
return true;
}
GroupInfo* groupInfo = mOriginInfo->mGroupInfo;
if (groupInfo->IsForPersistentStorage()) {
uint64_t newUsage = mOriginInfo->mUsage - mSize + end;
if (newUsage > mOriginInfo->mLimit) {
// This will block the thread, but it will also drop the mutex while
// waiting. The mutex will be reacquired again when the waiting is
// finished.
if (!quotaManager->LockedQuotaIsLifted()) {
return false;
}
// Threads raced, the origin info removal has been done by some other
// thread.
if (!mOriginInfo) {
// The other thread could allocate more space.
if (end > mSize) {
mSize = end;
}
return true;
}
nsCString group = mOriginInfo->mGroupInfo->mGroup;
nsCString origin = mOriginInfo->mOrigin;
mOriginInfo->LockedClearOriginInfos();
NS_ASSERTION(!mOriginInfo,
"Should have cleared in LockedClearOriginInfos!");
quotaManager->LockedRemoveQuotaForOrigin(PERSISTENCE_TYPE_PERSISTENT,
group, origin);
// Some other thread could increase the size without blocking (increasing
// the origin usage without hitting the limit), but no more than this one.
NS_ASSERTION(mSize < end, "This shouldn't happen!");
mSize = end;
return true;
}
mOriginInfo->mUsage = newUsage;
groupInfo->mUsage = groupInfo->mUsage - mSize + end;
mSize = end;
return true;
}
NS_ASSERTION(groupInfo->mPersistenceType == PERSISTENCE_TYPE_TEMPORARY,
"Huh?");
uint64_t delta = end - mSize;
uint64_t newUsage = mOriginInfo->mUsage + delta;
// Temporary storage has no limit for origin usage (there's a group and the
// global limit though).
uint64_t newGroupUsage = groupInfo->mUsage + delta;
// Temporary storage has a hard limit for group usage (20 % of the global
// limit).
if (newGroupUsage > quotaManager->GetGroupLimit()) {
return false;
}
uint64_t newTemporaryStorageUsage = quotaManager->mTemporaryStorageUsage +
delta;
if (newTemporaryStorageUsage > quotaManager->mTemporaryStorageLimit) {
// This will block the thread without holding the lock while waitting.
nsAutoTArray<OriginInfo*, 10> originInfos;
uint64_t sizeToBeFreed =
quotaManager->LockedCollectOriginsForEviction(delta, originInfos);
if (!sizeToBeFreed) {
return false;
}
NS_ASSERTION(sizeToBeFreed >= delta, "Huh?");
{
MutexAutoUnlock autoUnlock(quotaManager->mQuotaMutex);
for (uint32_t i = 0; i < originInfos.Length(); i++) {
quotaManager->DeleteTemporaryFilesForOrigin(originInfos[i]->mOrigin);
}
}
// Relocked.
NS_ASSERTION(mOriginInfo, "How come?!");
nsTArray<nsCString> origins;
for (uint32_t i = 0; i < originInfos.Length(); i++) {
OriginInfo* originInfo = originInfos[i];
NS_ASSERTION(originInfo != mOriginInfo, "Deleted itself!");
nsCString group = originInfo->mGroupInfo->mGroup;
nsCString origin = originInfo->mOrigin;
quotaManager->LockedRemoveQuotaForOrigin(PERSISTENCE_TYPE_TEMPORARY,
group, origin);
#ifdef DEBUG
originInfos[i] = nullptr;
#endif
origins.AppendElement(origin);
}
// We unlocked and relocked several times so we need to recompute all the
// essential variables and recheck the group limit.
delta = end - mSize;
newUsage = mOriginInfo->mUsage + delta;
newGroupUsage = groupInfo->mUsage + delta;
if (newGroupUsage > quotaManager->GetGroupLimit()) {
// Unfortunately some other thread increased the group usage in the
// meantime and we are not below the group limit anymore.
// However, the origin eviction must be finalized in this case too.
MutexAutoUnlock autoUnlock(quotaManager->mQuotaMutex);
quotaManager->FinalizeOriginEviction(origins);
return false;
}
newTemporaryStorageUsage = quotaManager->mTemporaryStorageUsage + delta;
NS_ASSERTION(newTemporaryStorageUsage <=
quotaManager->mTemporaryStorageLimit, "How come?!");
// Ok, we successfully freed enough space and the operation can continue
// without throwing the quota error.
mOriginInfo->mUsage = newUsage;
groupInfo->mUsage = newGroupUsage;
quotaManager->mTemporaryStorageUsage = newTemporaryStorageUsage;;
// Some other thread could increase the size in the meantime, but no more
// than this one.
NS_ASSERTION(mSize < end, "This shouldn't happen!");
mSize = end;
// Finally, release IO thread only objects and allow next synchronized
// ops for the evicted origins.
MutexAutoUnlock autoUnlock(quotaManager->mQuotaMutex);
quotaManager->FinalizeOriginEviction(origins);
return true;
}
mOriginInfo->mUsage = newUsage;
groupInfo->mUsage = newGroupUsage;
quotaManager->mTemporaryStorageUsage = newTemporaryStorageUsage;
mSize = end;
return true;
}
bool
QuotaObject::MaybeUpdateSize(int64_t aSize, bool aTruncate)
{
QuotaManager* quotaManager = QuotaManager::Get();
MOZ_ASSERT(quotaManager);
MutexAutoLock lock(quotaManager->mQuotaMutex);
if (mSize == aSize) {
return true;
}
if (!mOriginInfo) {
mSize = aSize;
return true;
}
GroupInfo* groupInfo = mOriginInfo->mGroupInfo;
MOZ_ASSERT(groupInfo);
if (mSize > aSize) {
if (aTruncate) {
const int64_t delta = mSize - aSize;
AssertNoUnderflow(quotaManager->mTemporaryStorageUsage, delta);
quotaManager->mTemporaryStorageUsage -= delta;
AssertNoUnderflow(groupInfo->mUsage, delta);
groupInfo->mUsage -= delta;
AssertNoUnderflow(mOriginInfo->mUsage, delta);
mOriginInfo->mUsage -= delta;
mSize = aSize;
}
return true;
}
MOZ_ASSERT(mSize < aSize);
nsRefPtr<GroupInfo> complementaryGroupInfo =
groupInfo->mGroupInfoPair->LockedGetGroupInfo(
ComplementaryPersistenceType(groupInfo->mPersistenceType));
uint64_t delta = aSize - mSize;
AssertNoOverflow(mOriginInfo->mUsage, delta);
uint64_t newUsage = mOriginInfo->mUsage + delta;
// Temporary storage has no limit for origin usage (there's a group and the
// global limit though).
AssertNoOverflow(groupInfo->mUsage, delta);
uint64_t newGroupUsage = groupInfo->mUsage + delta;
uint64_t groupUsage = groupInfo->mUsage;
if (complementaryGroupInfo) {
AssertNoOverflow(groupUsage, complementaryGroupInfo->mUsage);
groupUsage += complementaryGroupInfo->mUsage;
}
// Temporary storage has a hard limit for group usage (20 % of the global
// limit).
AssertNoOverflow(groupUsage, delta);
if (groupUsage + delta > quotaManager->GetGroupLimit()) {
return false;
}
AssertNoOverflow(quotaManager->mTemporaryStorageUsage, delta);
uint64_t newTemporaryStorageUsage = quotaManager->mTemporaryStorageUsage +
delta;
if (newTemporaryStorageUsage > quotaManager->mTemporaryStorageLimit) {
// This will block the thread without holding the lock while waitting.
nsAutoTArray<OriginInfo*, 10> originInfos;
uint64_t sizeToBeFreed =
quotaManager->LockedCollectOriginsForEviction(delta, originInfos);
if (!sizeToBeFreed) {
return false;
}
NS_ASSERTION(sizeToBeFreed >= delta, "Huh?");
{
MutexAutoUnlock autoUnlock(quotaManager->mQuotaMutex);
for (uint32_t i = 0; i < originInfos.Length(); i++) {
OriginInfo* originInfo = originInfos[i];
quotaManager->DeleteFilesForOrigin(
originInfo->mGroupInfo->mPersistenceType,
originInfo->mOrigin);
}
}
// Relocked.
NS_ASSERTION(mOriginInfo, "How come?!");
nsTArray<OriginParams> origins;
for (uint32_t i = 0; i < originInfos.Length(); i++) {
OriginInfo* originInfo = originInfos[i];
NS_ASSERTION(originInfo != mOriginInfo, "Deleted itself!");
PersistenceType persistenceType =
originInfo->mGroupInfo->mPersistenceType;
nsCString group = originInfo->mGroupInfo->mGroup;
nsCString origin = originInfo->mOrigin;
bool isApp = originInfo->mIsApp;
quotaManager->LockedRemoveQuotaForOrigin(persistenceType, group, origin);
#ifdef DEBUG
originInfos[i] = nullptr;
#endif
origins.AppendElement(OriginParams(persistenceType, origin, isApp));
}
// We unlocked and relocked several times so we need to recompute all the
// essential variables and recheck the group limit.
AssertNoUnderflow(aSize, mSize);
delta = aSize - mSize;
AssertNoOverflow(mOriginInfo->mUsage, delta);
newUsage = mOriginInfo->mUsage + delta;
AssertNoOverflow(groupInfo->mUsage, delta);
newGroupUsage = groupInfo->mUsage + delta;
groupUsage = groupInfo->mUsage;
if (complementaryGroupInfo) {
AssertNoOverflow(groupUsage, complementaryGroupInfo->mUsage);
groupUsage += complementaryGroupInfo->mUsage;
}
AssertNoOverflow(groupUsage, delta);
if (groupUsage + delta > quotaManager->GetGroupLimit()) {
// Unfortunately some other thread increased the group usage in the
// meantime and we are not below the group limit anymore.
// However, the origin eviction must be finalized in this case too.
MutexAutoUnlock autoUnlock(quotaManager->mQuotaMutex);
quotaManager->FinalizeOriginEviction(origins);
return false;
}
AssertNoOverflow(quotaManager->mTemporaryStorageUsage, delta);
newTemporaryStorageUsage = quotaManager->mTemporaryStorageUsage + delta;
NS_ASSERTION(newTemporaryStorageUsage <=
quotaManager->mTemporaryStorageLimit, "How come?!");
// Ok, we successfully freed enough space and the operation can continue
// without throwing the quota error.
mOriginInfo->mUsage = newUsage;
groupInfo->mUsage = newGroupUsage;
quotaManager->mTemporaryStorageUsage = newTemporaryStorageUsage;;
// Some other thread could increase the size in the meantime, but no more
// than this one.
MOZ_ASSERT(mSize < aSize);
mSize = aSize;
// Finally, release IO thread only objects and allow next synchronized
// ops for the evicted origins.
MutexAutoUnlock autoUnlock(quotaManager->mQuotaMutex);
quotaManager->FinalizeOriginEviction(origins);
return true;
}
mOriginInfo->mUsage = newUsage;
groupInfo->mUsage = newGroupUsage;
quotaManager->mTemporaryStorageUsage = newTemporaryStorageUsage;
mSize = aSize;
return true;
}
