/* Derived from source code of TrueCrypt 7.1a, which is Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed by the TrueCrypt License 3.0. Modifications and additions to the original source code (contained in this file) and all other portions of this file are Copyright (c) 2013-2017 IDRIX and are governed by the Apache License 2.0 the full text of which is contained in the file License.txt included in VeraCrypt binary and source code distribution packages. */ #ifdef TC_UNIX # include #endif #ifdef TC_MACOSX # include # include #endif #include "Platform/SyncEvent.h" #include "Platform/SystemLog.h" #include "Common/Crypto.h" #include "EncryptionThreadPool.h" namespace VeraCrypt { void EncryptionThreadPool::DoWork (WorkType::Enum type, const EncryptionMode *encryptionMode, byte *data, uint64 startUnitNo, uint64 unitCount, size_t sectorSize) { size_t fragmentCount; size_t unitsPerFragment; size_t remainder; byte *fragmentData; uint64 fragmentStartUnitNo; WorkItem *workItem; WorkItem *firstFragmentWorkItem; if (unitCount == 0) return; if (!ThreadPoolRunning || unitCount == 1) { switch (type) { case WorkType::DecryptDataUnits: encryptionMode->DecryptSectorsCurrentThread (data, startUnitNo, unitCount, sectorSize); break; case WorkType::EncryptDataUnits: encryptionMode->EncryptSectorsCurrentThread (data, startUnitNo, unitCount, sectorSize); break; default: throw ParameterIncorrect (SRC_POS); } return; } if (unitCount <= ThreadCount) { fragmentCount = (size_t) unitCount; unitsPerFragment = 1; remainder = 0; } else { fragmentCount = ThreadCount; unitsPerFragment = (size_t) unitCount / ThreadCount; remainder = (size_t) unitCount % ThreadCount; if (remainder > 0) ++unitsPerFragment; } fragmentData = data; fragmentStartUnitNo = startUnitNo; { ScopeLock lock (EnqueueMutex); firstFragmentWorkItem = &WorkItemQueue[EnqueuePosition]; while (firstFragmentWorkItem->State != WorkItem::State::Free) { WorkItemCompletedEvent.Wait(); } firstFragmentWorkItem->OutstandingFragmentCount.Set (fragmentCount); firstFragmentWorkItem->ItemException.reset(); while (fragmentCount-- > 0) { workItem = &WorkItemQueue[EnqueuePosition++]; if (EnqueuePosition >= QueueSize) EnqueuePosition = 0; while (workItem->State != WorkItem::State::Free) { WorkItemCompletedEvent.Wait(); } workItem->Type = type; workItem->FirstFragment = firstFragmentWorkItem; workItem->Encryption.Mode = encryptionMode; workItem->Encryption.Data = fragmentData; workItem->Encryption.UnitCount = unitsPerFragment; workItem->Encryption.StartUnitNo = fragmentStartUnitNo; workItem->Encryption.SectorSize = sectorSize; fragmentData += unitsPerFragment * sectorSize; fragmentStartUnitNo += unitsPerFragment; if (remainder > 0 && --remainder == 0) --unitsPerFragment; workItem->State.Set (WorkItem::State::Ready); WorkItemReadyEvent.Signal(); } } firstFragmentWorkItem->ItemCompletedEvent.Wait(); unique_ptr itemException; if (firstFragmentWorkItem->ItemException.get()) itemException = move_ptr(firstFragmentWorkItem->ItemException); firstFragmentWorkItem->State.Set (WorkItem::State::Free); WorkItemCompletedEvent.Signal(); if (itemException.get()) itemException->Throw(); } void EncryptionThreadPool::Start () { if (ThreadPoolRunning) return; size_t cpuCount; #ifdef TC_WINDOWS SYSTEM_INFO sysInfo; GetSystemInfo (&sysInfo); cpuCount = sysInfo.dwNumberOfProcessors; #elif defined (_SC_NPROCESSORS_ONLN) cpuCount = (size_t) sysconf (_SC_NPROCESSORS_ONLN); if (cpuCount == (size_t) -1) cpuCount = 1; #elif defined (TC_MACOSX) int cpuCountSys; int mib[2] = { CTL_HW, HW_NCPU }; size_t len = sizeof (cpuCountSys); if (sysctl (mib, 2, &cpuCountSys, &len, nullptr, 0) == -1) cpuCountSys = 1; cpuCount = (size_t) cpuCountSys; #else # error Cannot determine CPU count #endif if (cpuCount < 2) return; if (cpuCount > MaxThreadCount) cpuCount = MaxThreadCount; StopPending = false; DequeuePosition = 0; EnqueuePosition = 0; for (size_t i = 0; i < sizeof (WorkItemQueue) / sizeof (WorkItemQueue[0]); ++i) { WorkItemQueue[i].State.Set (WorkItem::State::Free); } try { for (ThreadCount = 0; ThreadCount < cpuCount; ++ThreadCount) { struct ThreadFunctor : public Functor { virtual void operator() () { WorkThreadProc(); } }; make_shared_auto (Thread, thread); thread->Start (new ThreadFunctor ()); RunningThreads.push_back (thread); } } catch (...) { try { ThreadPoolRunning = true; Stop(); } catch (...) { } throw; } ThreadPoolRunning = true; } void EncryptionThreadPool::Stop () { if (!ThreadPoolRunning) return; StopPending = true; WorkItemReadyEvent.Signal(); foreach_ref (const Thread &thread, RunningThreads) { thread.Join(); } ThreadCount = 0; ThreadPoolRunning = false; } void EncryptionThreadPool::WorkThreadProc () { try { WorkItem *workItem; while (!StopPending) { { ScopeLock lock (DequeueMutex); workItem = &WorkItemQueue[DequeuePosition++]; if (DequeuePosition >= QueueSize) DequeuePosition = 0; while (!StopPending && workItem->State != WorkItem::State::Ready) { WorkItemReadyEvent.Wait(); } workItem->State.Set (WorkItem::State::Busy); } if (StopPending) break; try { switch (workItem->Type) { case WorkType::DecryptDataUnits: workItem->Encryption.Mode->DecryptSectorsCurrentThread (workItem->Encryption.Data, workItem->Encryption.StartUnitNo, workItem->Encryption.UnitCount, workItem->Encryption.SectorSize); break; case WorkType::EncryptDataUnits: workItem->Encryption.Mode->EncryptSectorsCurrentThread (workItem->Encryption.Data, workItem->Encryption.StartUnitNo, workItem->Encryption.UnitCount, workItem->Encryption.SectorSize); break; default: throw ParameterIncorrect (SRC_POS); } } catch (Exception &e) { workItem->FirstFragment->ItemException.reset (e.CloneNew()); } catch (exception &e) { workItem->FirstFragment->ItemException.reset (new ExternalException (SRC_POS, StringConverter::ToExceptionString (e))); } catch (...) { workItem->FirstFragment->ItemException.reset (new UnknownException (SRC_POS)); } if (workItem != workItem->FirstFragment) { workItem->State.Set (WorkItem::State::Free); WorkItemCompletedEvent.Signal(); } if (workItem->FirstFragment->OutstandingFragmentCount.Decrement() == 0) workItem->FirstFragment->ItemCompletedEvent.Signal(); } } catch (exception &e) { SystemLog::WriteException (e); } catch (...) { SystemLog::WriteException (UnknownException (SRC_POS)); } } volatile bool EncryptionThreadPool::ThreadPoolRunning = false; volatile bool EncryptionThreadPool::StopPending = false; size_t EncryptionThreadPool::ThreadCount; EncryptionThreadPool::WorkItem EncryptionThreadPool::WorkItemQueue[QueueSize]; volatile size_t EncryptionThreadPool::EnqueuePosition; volatile size_t EncryptionThreadPool::DequeuePosition; Mutex EncryptionThreadPool::EnqueueMutex; Mutex EncryptionThreadPool::DequeueMutex; SyncEvent EncryptionThreadPool::WorkItemReadyEvent; SyncEvent EncryptionThreadPool::WorkItemCompletedEvent; list < shared_ptr > EncryptionThreadPool::RunningThreads; } 37 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258