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HashManager.cpp
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HashManager.cpp
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/*
* Copyright (C) 2001-2012 Jacek Sieka, arnetheduck on gmail point com
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "stdinc.h"
#include "HashManager.h"
#include "ShareManager.h"
#include "SimpleXML.h"
#include "LogManager.h"
#include "File.h"
#include "ZUtils.h"
#include "SFVReader.h"
#ifndef _WIN32
#include <sys/mman.h> // mmap, munmap, madvise
#include <signal.h> // for handling read errors from previous trio
#include <setjmp.h>
#endif
#include <memory>
#ifdef USE_XATTR
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "attr/attributes.h"
#endif
namespace dcpp {
#define HASH_FILE_VERSION_STRING "2"
static const uint32_t HASH_FILE_VERSION = 2;
const int64_t HashManager::MIN_BLOCK_SIZE = 64 * 1024;
const string HashManager::StreamStore::g_streamName(".gltth");
inline void HashManager::StreamStore::setCheckSum(TTHStreamHeader& p_header) {
p_header.magic = g_MAGIC;
uint32_t l_sum = 0;
for (size_t i = 0; i < sizeof(TTHStreamHeader) / sizeof(uint32_t); i++)
l_sum ^= ((uint32_t*) & p_header)[i];
p_header.checksum ^= l_sum;
}
inline bool HashManager::StreamStore::validateCheckSum(const TTHStreamHeader& p_header) {
if (p_header.magic != g_MAGIC)
return false;
uint32_t l_sum = 0;
for (size_t i = 0; i < sizeof(TTHStreamHeader) / sizeof(uint32_t); i++)
l_sum ^= ((uint32_t*) & p_header)[i];
return (l_sum == 0);
}
#ifdef USE_XATTR
static const uint64_t SIGNIFIC_VALUE = 10000000;
static const uint64_t NTFS_TIME_OFFSET = ((uint64_t)(369 * 365 + 89) * 24 * 3600 * SIGNIFIC_VALUE);
static uint64_t getTimeStamp(const string &fname){
struct stat st;
/* WARNING: this is not completly portable conversion!
For more information about portable conversion of linux time to windows filetime see
ntfs-3g_ntfsprogs/include/ntfs-3g/ntfstime.h from NTFS-3G sources. */
if (::stat(fname.c_str(), &st) == 0)
return (uint64_t)st.st_mtime * SIGNIFIC_VALUE + NTFS_TIME_OFFSET + st.st_mtim.tv_nsec/100;
return 0;
}
#endif // USE_XATTR
bool HashManager::StreamStore::loadTree(const string& p_filePath, TigerTree &tree, int64_t p_aFileSize)
{
#ifdef USE_XATTR
const int64_t fileSize = (p_aFileSize == -1) ? File::getSize(p_filePath) : p_aFileSize;
const size_t hdrSz = sizeof(TTHStreamHeader);
const size_t totalSz = ATTR_MAX_VALUELEN;
int blockSize = totalSz;
TTHStreamHeader h;
std::unique_ptr<uint8_t[]> buf(new uint8_t[totalSz]);
if (attr_get(p_filePath.c_str(), g_streamName.c_str(), (char*)(void*)buf.get(), &blockSize, 0) == 0){
memcpy(&h, buf.get(), hdrSz);
printf("%s: timestamps header=0x%llx, current=0x%llx, difference(should be zero)=%lld\n",
p_filePath.c_str(), h.timeStamp, getTimeStamp(p_filePath), h.timeStamp - getTimeStamp(p_filePath));
if (!(h.timeStamp == getTimeStamp(p_filePath) && validateCheckSum(h))){ // File was modified and we should reset attr.
deleteStream(p_filePath);
return false;
}
const size_t datalen = blockSize - hdrSz;
std::unique_ptr<uint8_t[]> tail(new uint8_t[datalen]);
memcpy(tail.get(), (uint8_t*)buf.get() + hdrSz, datalen);
TigerTree p_Tree = TigerTree(fileSize, h.blockSize, tail.get());
if (p_Tree.getRoot() == h.root){
tree = p_Tree;
return true;
}
else
return false;
}
#endif //USE_XATTR
return false;
}
bool HashManager::StreamStore::saveTree(const string& p_filePath, const TigerTree& p_Tree)
{
#ifdef USE_XATTR
TTHStreamHeader h;
h.fileSize = File::getSize(p_filePath);
h.timeStamp = getTimeStamp(p_filePath);
h.root = p_Tree.getRoot();
h.blockSize = p_Tree.getBlockSize();
setCheckSum(h);
{
const size_t sz = sizeof(TTHStreamHeader) + p_Tree.getLeaves().size() * TTHValue::BYTES;
std::unique_ptr<uint8_t[]> buf(new uint8_t[sz]);
memcpy(buf.get(), &h, sizeof(TTHStreamHeader));
memcpy(buf.get() + sizeof(TTHStreamHeader), p_Tree.getLeaves()[0].data, p_Tree.getLeaves().size() * TTHValue::BYTES);
return (attr_set(p_filePath.c_str(), g_streamName.c_str(), (char*)(void*)buf.get(), sz, 0) == 0);
}
#endif //USE_XATTR
return false;
}
void HashManager::StreamStore::deleteStream(const string& p_filePath)
{
#ifdef USE_XATTR
printf("Resetting Xattr for %s\n", p_filePath.c_str());
attr_remove(p_filePath.c_str(), g_streamName.c_str(), 0);
#endif //USE_XATTR
}
bool HashManager::checkTTH(const string& aFileName, int64_t aSize, uint32_t aTimeStamp) {
Lock l(cs);
const TTHValue* tthold = getFileTTHif(Text::toLower(aFileName));
const TTHValue* tth = getFileTTHif(aFileName);
if (tthold != NULL && tth == NULL) {
TigerTree tt(MIN_BLOCK_SIZE);
store.getTree(*tthold, tt);
hashDone(aFileName, aTimeStamp, tt, 0, aSize);
m_streamstore.saveTree(aFileName, tt);
return true;
}
else if (!store.checkTTH(aFileName, aSize, aTimeStamp)) {
hasher.hashFile(aFileName, aSize);
return false;
}
return true;
}
TTHValue HashManager::getTTH(const string& aFileName, int64_t aSize) {
Lock l(cs);
const TTHValue* tth = store.getTTH(aFileName);
if (tth == NULL) {
hasher.hashFile(aFileName, aSize);
throw HashException();
}
return *tth;
}
const TTHValue* HashManager::getFileTTHif(const string& aFileName) {
Lock l(cs);
return store.getTTH(aFileName);
}
bool HashManager::getTree(const TTHValue& root, TigerTree& tt) {
Lock l(cs);
return store.getTree(root, tt);
}
size_t HashManager::getBlockSize(const TTHValue& root) {
Lock l(cs);
return store.getBlockSize(root);
}
void HashManager::hashDone(const string& aFileName, uint32_t aTimeStamp, const TigerTree& tth, int64_t speed, int64_t size) {
try {
Lock l(cs);
store.addFile(aFileName, aTimeStamp, tth, true);
m_streamstore.saveTree(aFileName, tth);
} catch (const Exception& e) {
LogManager::getInstance()->message(str(F_("Hashing failed: %1%") % e.getError()));
return;
}
fire(HashManagerListener::TTHDone(), aFileName, tth.getRoot());
if (speed > 0) {
LogManager::getInstance()->message(str(F_("Finished hashing: %1% (%2% at %3%/s)") % Util::addBrackets(aFileName) %
Util::formatBytes(size) % Util::formatBytes(speed)));
} else if(size >= 0) {
LogManager::getInstance()->message(str(F_("Finished hashing: %1% (%2%)") % Util::addBrackets(aFileName) %
Util::formatBytes(size)));
} else {
LogManager::getInstance()->message(str(F_("Finished hashing: %1%") % Util::addBrackets(aFileName)));
}
}
void HashManager::HashStore::addFile(const string& aFileName, uint32_t aTimeStamp, const TigerTree& tth, bool aUsed) {
addTree(tth);
string fname = Util::getFileName(aFileName);
string fpath = Util::getFilePath(aFileName);
FileInfoList& fileList = fileIndex[fpath];
FileInfoIter j = find(fileList.begin(), fileList.end(), fname);
if (j != fileList.end()) {
fileList.erase(j);
}
fileList.push_back(FileInfo(fname, tth.getRoot(), aTimeStamp, aUsed));
dirty = true;
}
void HashManager::HashStore::addTree(const TigerTree& tt) noexcept {
if (treeIndex.find(tt.getRoot()) == treeIndex.end()) {
try {
File f(getDataFile(), File::READ | File::WRITE, File::OPEN);
int64_t index = saveTree(f, tt);
treeIndex.insert(make_pair(tt.getRoot(), TreeInfo(tt.getFileSize(), index, tt.getBlockSize())));
dirty = true;
} catch (const FileException& e) {
LogManager::getInstance()->message(str(F_("Error saving hash data: %1%") % e.getError()));
}
}
}
int64_t HashManager::HashStore::saveTree(File& f, const TigerTree& tt) {
if (tt.getLeaves().size() == 1)
return SMALL_TREE;
f.setPos(0);
int64_t pos = 0;
size_t n = sizeof(pos);
if (f.read(&pos, n) != sizeof(pos))
throw HashException(_("Unable to read hash data file"));
// Check if we should grow the file, we grow by a meg at a time...
int64_t datsz = f.getSize();
if ((pos + (int64_t) (tt.getLeaves().size() * TTHValue::BYTES)) >= datsz) {
f.setPos(datsz + 1024 * 1024);
f.setEOF();
}
f.setPos(pos);dcassert(tt.getLeaves().size()> 1);
f.write(tt.getLeaves()[0].data, (tt.getLeaves().size() * TTHValue::BYTES));
int64_t p2 = f.getPos();
f.setPos(0);
f.write(&p2, sizeof(p2));
return pos;
}
bool HashManager::HashStore::loadTree(File& f, const TreeInfo& ti, const TTHValue& root, TigerTree& tt) {
if (ti.getIndex() == SMALL_TREE) {
tt = TigerTree(ti.getSize(), ti.getBlockSize(), root);
return true;
}
try {
f.setPos(ti.getIndex());
size_t datalen = TigerTree::calcBlocks(ti.getSize(), ti.getBlockSize()) * TTHValue::BYTES;
std::unique_ptr<uint8_t[]> buf(new uint8_t[datalen]);
f.read((void*)buf.get(), datalen);
tt = TigerTree(ti.getSize(), ti.getBlockSize(), buf.get());
if (!(tt.getRoot() == root))
return false;
} catch (const Exception&) {
return false;
}
return true;
}
bool HashManager::HashStore::getTree(const TTHValue& root, TigerTree& tt) {
TreeIter i = treeIndex.find(root);
if (i == treeIndex.end())
return false;
try {
File f(getDataFile(), File::READ, File::OPEN);
return loadTree(f, i->second, root, tt);
} catch (const Exception&) {
return false;
}
}
size_t HashManager::HashStore::getBlockSize(const TTHValue& root) const {
TreeMap::const_iterator i = treeIndex.find(root);
return i == treeIndex.end() ? 0 : i->second.getBlockSize();
}
bool HashManager::HashStore::checkTTH(const string& aFileName, int64_t aSize, uint32_t aTimeStamp) {
string fname = Util::getFileName(aFileName);
string fpath = Util::getFilePath(aFileName);
DirIter i = fileIndex.find(fpath);
if (i != fileIndex.end()) {
FileInfoIter j = find(i->second.begin(), i->second.end(), fname);
if (j != i->second.end()) {
FileInfo& fi = *j;
TreeIter ti = treeIndex.find(fi.getRoot());
if (ti == treeIndex.end() || ti->second.getSize() != aSize || fi.getTimeStamp() != aTimeStamp) {
i->second.erase(j);
dirty = true;
return false;
}
return true;
}
}
return false;
}
const TTHValue* HashManager::HashStore::getTTH(const string& aFileName) {
string fname = Util::getFileName(aFileName);
string fpath = Util::getFilePath(aFileName);
DirIter i = fileIndex.find(fpath);
if (i != fileIndex.end()) {
FileInfoIter j = find(i->second.begin(), i->second.end(), fname);
if (j != i->second.end()) {
j->setUsed(true);
return &(j->getRoot());
}
}
return NULL;
}
void HashManager::HashStore::rebuild() {
try {
DirMap newFileIndex;
TreeMap newTreeIndex;
for (DirIter i = fileIndex.begin(); i != fileIndex.end(); ++i) {
for (FileInfoIter j = i->second.begin(); j != i->second.end(); ++j) {
if (!j->getUsed())
continue;
TreeIter k = treeIndex.find(j->getRoot());
if (k != treeIndex.end()) {
newTreeIndex[j->getRoot()] = k->second;
}
}
}
string tmpName = getDataFile() + ".tmp";
string origName = getDataFile();
createDataFile(tmpName);
{
File in(origName, File::READ, File::OPEN);
File out(tmpName, File::READ | File::WRITE, File::OPEN);
for (TreeIter i = newTreeIndex.begin(); i != newTreeIndex.end();) {
TigerTree tree;
if (loadTree(in, i->second, i->first, tree)) {
i->second.setIndex(saveTree(out, tree));
++i;
} else {
newTreeIndex.erase(i++);
}
}
}
for (DirIter i = fileIndex.begin(); i != fileIndex.end(); ++i) {
DirIter fi = newFileIndex.insert(make_pair(i->first, FileInfoList())).first;
for (FileInfoIter j = i->second.begin(); j != i->second.end(); ++j) {
if (newTreeIndex.find(j->getRoot()) != newTreeIndex.end()) {
fi->second.push_back(*j);
}
}
if (fi->second.empty())
newFileIndex.erase(fi);
}
File::deleteFile(origName);
File::renameFile(tmpName, origName);
treeIndex = newTreeIndex;
fileIndex = newFileIndex;
dirty = true;
save();
} catch (const Exception& e) {
LogManager::getInstance()->message(str(F_("Hashing failed: %1%") % e.getError()));
}
}
void HashManager::HashStore::save() {
if (dirty) {
try {
File ff(getIndexFile() + ".tmp", File::WRITE, File::CREATE | File::TRUNCATE);
BufferedOutputStream<false> f(&ff);
string tmp;
string b32tmp;
f.write(SimpleXML::utf8Header);
f.write(LIT("<HashStore Version=\"" HASH_FILE_VERSION_STRING "\">\r\n"));
f.write(LIT("\t<Trees>\r\n"));
for (TreeIter i = treeIndex.begin(); i != treeIndex.end(); ++i) {
const TreeInfo& ti = i->second;
f.write(LIT("\t\t<Hash Type=\"TTH\" Index=\""));
f.write(Util::toString(ti.getIndex()));
f.write(LIT("\" BlockSize=\""));
f.write(Util::toString(ti.getBlockSize()));
f.write(LIT("\" Size=\""));
f.write(Util::toString(ti.getSize()));
f.write(LIT("\" Root=\""));
b32tmp.clear();
f.write(i->first.toBase32(b32tmp));
f.write(LIT("\"/>\r\n"));
}
f.write(LIT("\t</Trees>\r\n\t<Files>\r\n"));
for (DirIter i = fileIndex.begin(); i != fileIndex.end(); ++i) {
const string& dir = i->first;
for (FileInfoIter j = i->second.begin(); j != i->second.end(); ++j) {
const FileInfo& fi = *j;
f.write(LIT("\t\t<File Name=\""));
f.write(SimpleXML::escape(dir + fi.getFileName(), tmp, true));
f.write(LIT("\" TimeStamp=\""));
f.write(Util::toString(fi.getTimeStamp()));
f.write(LIT("\" Root=\""));
b32tmp.clear();
f.write(fi.getRoot().toBase32(b32tmp));
f.write(LIT("\"/>\r\n"));
}
}
f.write(LIT("\t</Files>\r\n</HashStore>"));
f.flush();
ff.close();
File::deleteFile( getIndexFile());
File::renameFile(getIndexFile() + ".tmp", getIndexFile());
dirty = false;
} catch (const FileException& e) {
LogManager::getInstance()->message(str(F_("Error saving hash data: %1%") % e.getError()));
}
}
}
class HashLoader: public SimpleXMLReader::CallBack {
public:
HashLoader(HashManager::HashStore& s) :
store(s), size(0), timeStamp(0), version(HASH_FILE_VERSION), inTrees(false), inFiles(false), inHashStore(false) {
}
virtual void startTag(const string& name, StringPairList& attribs, bool simple);
virtual void endTag(const string& name, const string& data);
private:
HashManager::HashStore& store;
string file;
int64_t size;
uint32_t timeStamp;
int version;
bool inTrees;
bool inFiles;
bool inHashStore;
};
void HashManager::HashStore::load() {
try {
Util::migrate(getIndexFile());
HashLoader l(*this);
File f(getIndexFile(), File::READ, File::OPEN);
SimpleXMLReader(&l).parse(f);
} catch (const Exception&) {
// ...
}
}
static const string sHashStore = "HashStore";
static const string sversion = "version"; // Oops, v1 was like this
static const string sVersion = "Version";
static const string sTrees = "Trees";
static const string sFiles = "Files";
static const string sFile = "File";
static const string sName = "Name";
static const string sSize = "Size";
static const string sHash = "Hash";
static const string sType = "Type";
static const string sTTH = "TTH";
static const string sIndex = "Index";
static const string sLeafSize = "LeafSize"; // Residue from v1 as well
static const string sBlockSize = "BlockSize";
static const string sTimeStamp = "TimeStamp";
static const string sRoot = "Root";
void HashLoader::startTag(const string& name, StringPairList& attribs, bool simple) {
if (!inHashStore && name == sHashStore) {
version = Util::toInt(getAttrib(attribs, sVersion, 0));
if (version == 0) {
version = Util::toInt(getAttrib(attribs, sversion, 0));
}
inHashStore = !simple;
} else if (inHashStore && version == 2) {
if (inTrees && name == sHash) {
const string& type = getAttrib(attribs, sType, 0);
int64_t index = Util::toInt64(getAttrib(attribs, sIndex, 1));
int64_t blockSize = Util::toInt64(getAttrib(attribs, sBlockSize, 2));
int64_t size = Util::toInt64(getAttrib(attribs, sSize, 3));
const string& root = getAttrib(attribs, sRoot, 4);
if (!root.empty() && type == sTTH && (index >= 8 || index == HashManager::SMALL_TREE) && blockSize >= 1024) {
store.treeIndex[TTHValue(root)] = HashManager::HashStore::TreeInfo(size, index, blockSize);
}
} else if (inFiles && name == sFile) {
file = getAttrib(attribs, sName, 0);
timeStamp = Util::toUInt32(getAttrib(attribs, sTimeStamp, 1));
const string& root = getAttrib(attribs, sRoot, 2);
if (!file.empty() && size >= 0 && timeStamp > 0 && !root.empty()) {
string fname = Util::getFileName(file);
string fpath = Util::getFilePath(file);
store.fileIndex[fpath].push_back(HashManager::HashStore::FileInfo(fname, TTHValue(root), timeStamp,
false));
}
} else if (name == sTrees) {
inTrees = !simple;
} else if (name == sFiles) {
inFiles = !simple;
}
}
}
void HashLoader::endTag(const string& name, const string&) {
if (name == sFile) {
file.clear();
}
}
HashManager::HashStore::HashStore() :
dirty(false) {
Util::migrate(getDataFile());
if (File::getSize(getDataFile()) <= static_cast<int64_t> (sizeof(int64_t))) {
try {
createDataFile( getDataFile());
} catch (const FileException&) {
// ?
}
}
}
/**
* Creates the data files for storing hash values.
* The data file is very simple in its format. The first 8 bytes
* are filled with an int64_t (little endian) of the next write position
* in the file counting from the start (so that file can be grown in chunks).
* We start with a 1 mb file, and then grow it as needed to avoid fragmentation.
* To find data inside the file, use the corresponding index file.
* Since file is never deleted, space will eventually be wasted, so a rebuild
* should occasionally be done.
*/
void HashManager::HashStore::createDataFile(const string& name) {
try {
File dat(name, File::WRITE, File::CREATE | File::TRUNCATE);
dat.setPos(1024 * 1024);
dat.setEOF();
dat.setPos(0);
int64_t start = sizeof(start);
dat.write(&start, sizeof(start));
} catch (const FileException& e) {
LogManager::getInstance()->message(str(F_("Error creating hash data file: %1%") % e.getError()));
}
}
void HashManager::Hasher::hashFile(const string& fileName, int64_t size) {
Lock l(cs);
if (w.insert(make_pair(fileName, size)).second) {
if(paused > 0)
paused++;
else
s.signal();
}
}
bool HashManager::Hasher::pause() {
Lock l(cs);
return paused++ > 0;
}
void HashManager::Hasher::resume() {
Lock l(cs);
while(--paused > 0)
s.signal();
}
bool HashManager::Hasher::isPaused() const {
Lock l(cs);
return paused > 0;
}
void HashManager::Hasher::stopHashing(const string& baseDir) {
Lock l(cs);
for (WorkIter i = w.begin(); i != w.end();) {
if (Util::strnicmp(baseDir, i->first, baseDir.length()) == 0) {
w.erase(i++);
} else {
++i;
}
}
}
void HashManager::Hasher::getStats(string& curFile, int64_t& bytesLeft, size_t& filesLeft) {
Lock l(cs);
curFile = currentFile;
filesLeft = w.size();
if (running)
filesLeft++;
bytesLeft = 0;
for (WorkMap::const_iterator i = w.begin(); i != w.end(); ++i) {
bytesLeft += i->second;
}
bytesLeft += currentSize;
}
void HashManager::Hasher::instantPause() {
bool wait = false;
{
Lock l(cs);
if(paused > 0) {
paused++;
wait = true;
}
}
if(wait)
s.wait();
}
#ifdef _WIN32
#define BUF_SIZE (256*1024)
bool HashManager::Hasher::fastHash(const string& fname, uint8_t* buf, TigerTree& tth, int64_t size, CRC32Filter* xcrc32) {
HANDLE h = INVALID_HANDLE_VALUE;
DWORD x, y;
if (!GetDiskFreeSpaceW(Text::utf8ToWide(Util::getFilePath(fname)).c_str(), &y, &x, &y, &y)) {
return false;
} else {
if ((BUF_SIZE % x) != 0) {
return false;
} else {
h = ::CreateFileW(Text::utf8ToWide(fname).c_str(), GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
FILE_FLAG_NO_BUFFERING | FILE_FLAG_OVERLAPPED, NULL);
if (h == INVALID_HANDLE_VALUE)
return false;
}
}
DWORD hn = 0;
DWORD rn = 0;
uint8_t* hbuf = buf + BUF_SIZE;
uint8_t* rbuf = buf;
OVERLAPPED over = { 0 };
BOOL res = TRUE;
over.hEvent = CreateEvent(NULL, FALSE, TRUE, NULL);
bool ok = false;
uint64_t lastRead = GET_TICK();
if (!::ReadFile(h, hbuf, BUF_SIZE, &hn, &over)) {
if (GetLastError() == ERROR_HANDLE_EOF) {
hn = 0;
} else if (GetLastError() == ERROR_IO_PENDING) {
if (!GetOverlappedResult(h, &over, &hn, TRUE)) {
if (GetLastError() == ERROR_HANDLE_EOF) {
hn = 0;
} else {
goto cleanup;
}
}
} else {
goto cleanup;
}
}
over.Offset = hn;
size -= hn;
while (!stop) {
if (size > 0) {
// Start a new overlapped read
ResetEvent(over.hEvent);
if (SETTING(MAX_HASH_SPEED) > 0) {
uint64_t now = GET_TICK();
uint64_t minTime = hn * 1000LL / (SETTING(MAX_HASH_SPEED) * 1024LL * 1024LL);
if (lastRead + minTime > now) {
uint64_t diff = now - lastRead;
Thread::sleep(minTime - diff);
}
lastRead = lastRead + minTime;
} else {
lastRead = GET_TICK();
}
res = ReadFile(h, rbuf, BUF_SIZE, &rn, &over);
} else {
rn = 0;
}
tth.update(hbuf, hn);
if (xcrc32)
(*xcrc32)(hbuf, hn);
{
Lock l(cs);
currentSize = max(currentSize - hn, _LL(0));
}
if (size == 0) {
ok = true;
break;
}
if (!res) {
// deal with the error code
switch (GetLastError()) {
case ERROR_IO_PENDING:
if (!GetOverlappedResult(h, &over, &rn, TRUE)) {
dcdebug("Error 0x%x: %s\n", GetLastError(), Util::translateError(GetLastError()).c_str());
goto cleanup;
}
break;
default:
dcdebug("Error 0x%x: %s\n", GetLastError(), Util::translateError(GetLastError()).c_str());
goto cleanup;
}
}
instantPause();
*((uint64_t*)&over.Offset) += rn;
size -= rn;
swap(rbuf, hbuf);
swap(rn, hn);
}
cleanup:
::CloseHandle(over.hEvent);
::CloseHandle(h);
return ok;
}
#else // !_WIN32
static sigjmp_buf sb_env;
static void sigbus_handler(int signum
#ifndef __HAIKU__
, siginfo_t* info, void* context
#endif
) {
// Jump back to the fastHash which will return error. Apparently truncating
// a file in Solaris sets si_code to BUS_OBJERR
#ifndef __HAIKU__
if (signum == SIGBUS && (info->si_code == BUS_ADRERR || info->si_code == BUS_OBJERR))
siglongjmp(sb_env, 1);
#endif
}
bool HashManager::Hasher::fastHash(const string& filename, uint8_t* , TigerTree& tth, int64_t size, CRC32Filter* xcrc32) {
static StreamStore streamStore;
if (streamStore.loadTree(filename, tth, -1)){
printf ("%s: hash [%s] was loaded from Xattr.\n", filename.c_str(), tth.getRoot().toBase32().c_str());
return true;
}
static const int64_t BUF_BYTES = (SETTING(HASH_BUFFER_SIZE_MB) >= 1)? SETTING(HASH_BUFFER_SIZE_MB)*1024*1024 : 0x800000;
static const int64_t BUF_SIZE = BUF_BYTES - (BUF_BYTES % getpagesize());
int fd = open(Text::fromUtf8(filename).c_str(), O_RDONLY);
if(fd == -1) {
dcdebug("Error opening file %s: %s\n", filename.c_str(), Util::translateError(errno).c_str());
return false;
}
const int maxHashSpeed = SETTING(MAX_HASH_SPEED);
int64_t pos = 0;
int64_t size_read = 0;
void *buf = NULL;
bool ok = false;
// Prepare and setup a signal handler in case of SIGBUS during mmapped file reads.
// SIGBUS can be sent when the file is truncated or in case of read errors.
struct sigaction act, oldact;
sigset_t signalset;
sigemptyset(&signalset);
act.sa_handler = NULL;
#ifndef __HAIKU__
act.sa_sigaction = sigbus_handler;
#endif
act.sa_mask = signalset;
#ifdef SA_SIGINFO
act.sa_flags = SA_SIGINFO | SA_RESETHAND;
#else
act.sa_flags = NULL;
#endif
if (sigaction(SIGBUS, &act, &oldact) == -1) {
dcdebug("Failed to set signal handler for fastHash\n");
close(fd);
return false; // Better luck with the slow hash.
}
uint64_t lastRead = GET_TICK();
unsigned long mmap_flags = static_cast<bool>(SETTING(HASH_BUFFER_PRIVATE))? MAP_PRIVATE : MAP_SHARED;
#ifdef MAP_POPULATE
if (static_cast<bool>(SETTING(HASH_BUFFER_POPULATE)))
mmap_flags |= MAP_POPULATE;
#endif
#ifdef MAP_NORESERVE
if (static_cast<bool>(SETTING(HASH_BUFFER_NORESERVE)))
mmap_flags |= MAP_NORESERVE;
#endif
while (pos < size && !stop) {
size_read = std::min(size - pos, BUF_SIZE);
buf = mmap(0, size_read, PROT_READ, mmap_flags, fd, pos);
if(buf == MAP_FAILED) {
dcdebug("Error calling mmap for file %s: %s\n", filename.c_str(), Util::translateError(errno).c_str());
break;
}
if (sigsetjmp(sb_env, 1)) {
dcdebug("Caught SIGBUS for file %s\n", filename.c_str());
break;
}
if (posix_madvise(buf, size_read, POSIX_MADV_SEQUENTIAL | POSIX_MADV_WILLNEED) == -1) {
dcdebug("Error calling madvise for file %s: %s\n", filename.c_str(), Util::translateError(errno).c_str());
break;
}
if(maxHashSpeed > 0) {
uint64_t now = GET_TICK();
uint64_t minTime = size_read * 1000LL / (maxHashSpeed * 1024LL * 1024LL);
if(lastRead + minTime> now) {
uint64_t diff = now - lastRead;
Thread::sleep(minTime - diff);
}
lastRead = lastRead + minTime;
} else {
lastRead = GET_TICK();
}
tth.update(buf, size_read);
if(xcrc32)
(*xcrc32)(buf, size_read);
{
Lock l(cs);
currentSize = max(static_cast<uint64_t>(currentSize - size_read), static_cast<uint64_t>(0));
}
if (munmap(buf, size_read) == -1) {
dcdebug("Error calling munmap for file %s: %s\n", filename.c_str(), Util::translateError(errno).c_str());
break;
}
buf = NULL;
pos += size_read;
instantPause();
if (pos == size) {
ok = true;
}
}
if (buf != NULL && buf != MAP_FAILED && munmap(buf, size_read) == -1) {
dcdebug("Error calling munmap for file %s: %s\n", filename.c_str(), Util::translateError(errno).c_str());
}
close(fd);
if (sigaction(SIGBUS, &oldact, NULL) == -1) {
dcdebug("Failed to reset old signal handler for SIGBUS\n");
}
if (ok)
streamStore.saveTree(filename, tth);
return ok;
}
#endif // !_WIN32
int HashManager::Hasher::run() {
setThreadPriority(Thread::IDLE);
setThreadName("Hasher");
uint8_t* buf = NULL;
bool virtualBuf = true;
string fname;
bool last = false;
pause();
for(;;) {
s.wait();
if(stop)
break;
if(rebuild) {
HashManager::getInstance()->doRebuild();
rebuild = false;
LogManager::getInstance()->message(_("Hash database rebuilt"));
continue;
}
{
Lock l(cs);
if(!w.empty()) {
currentFile = fname = w.begin()->first;
currentSize = w.begin()->second;
w.erase(w.begin());
last = w.empty();
} else {
last = true;
fname.clear();
}
}
running = true;
instantPause();
if(!fname.empty()) {
int64_t size = File::getSize(fname);
#ifdef _WIN32
if(buf == NULL) {
virtualBuf = true;
buf = (uint8_t*)VirtualAlloc(NULL, 2*BUF_SIZE, MEM_COMMIT, PAGE_READWRITE);
}
#else
static const int64_t BUF_BYTES = (SETTING(HASH_BUFFER_SIZE_MB) >= 1)? SETTING(HASH_BUFFER_SIZE_MB)*1024*1024 : 0x800000;
static const int64_t BUF_SIZE = BUF_BYTES - (BUF_BYTES % getpagesize());
#endif
if(buf == NULL) {
virtualBuf = false;
buf = new uint8_t[BUF_SIZE];
}
try {
File f(fname, File::READ, File::OPEN);
int64_t bs = max(TigerTree::calcBlockSize(f.getSize(), 10), MIN_BLOCK_SIZE);
uint64_t start = GET_TICK();
uint32_t timestamp = f.getLastModified();
TigerTree slowTTH(bs);
TigerTree* tth = &slowTTH;
CRC32Filter crc32;
SFVReader sfv(fname);
CRC32Filter* xcrc32 = 0;
if(sfv.hasCRC())
xcrc32 = &crc32;
TigerTree fastTTH(bs);
tth = &fastTTH;
#ifdef _WIN32
if(!virtualBuf || !BOOLSETTING(FAST_HASH) || !fastHash(fname, buf, fastTTH, size, xcrc32)) {
#else
if(!BOOLSETTING(FAST_HASH) || !fastHash(fname, 0, fastTTH, size, xcrc32)) {