libcryfs/impl/FilesystemImpl.cpp

322 lines
12 KiB
C++

#include "FilesystemImpl.h"
#include <fcntl.h>
#include "../fs_interface/Device.h"
#include "../fs_interface/Dir.h"
#include "../fs_interface/Symlink.h"
#include "../fuse/FuseErrnoException.h"
#include "../fs_interface/File.h"
#include <messmer/cpp-utils/logging/logging.h>
#include <messmer/cpp-utils/pointer/unique_ref.h>
#include <sstream>
using namespace fspp;
using cpputils::dynamic_pointer_move;
using cpputils::unique_ref;
using cpputils::make_unique_ref;
using std::vector;
using std::string;
using boost::none;
namespace bf = boost::filesystem;
using namespace cpputils::logging;
#ifdef FSPP_PROFILE
#include "Profiler.h"
#include <iomanip>
#include <ios>
#define PROFILE(name) Profiler profiler_##name(&name);
#else
#define PROFILE(name)
#endif
FilesystemImpl::FilesystemImpl(Device *device)
:
#ifdef FSPP_PROFILE
_loadFileNanosec(0), _loadDirNanosec(0), _loadSymlinkNanosec(0), _openFileNanosec(0), _flushNanosec(0),
_closeFileNanosec(0), _lstatNanosec(0), _fstatNanosec(0), _chmodNanosec(0), _chownNanosec(0), _truncateNanosec(0),
_ftruncateNanosec(0), _readNanosec(0), _writeNanosec(0), _fsyncNanosec(0), _fdatasyncNanosec(0), _accessNanosec(0),
_createAndOpenFileNanosec(0), _createAndOpenFileNanosec_withoutLoading(0), _mkdirNanosec(0),
_mkdirNanosec_withoutLoading(0), _rmdirNanosec(0), _rmdirNanosec_withoutLoading(0), _unlinkNanosec(0),
_unlinkNanosec_withoutLoading(0), _renameNanosec(0), _readDirNanosec(0), _readDirNanosec_withoutLoading(0),
_utimensNanosec(0), _statfsNanosec(0), _createSymlinkNanosec(0), _createSymlinkNanosec_withoutLoading(0),
_readSymlinkNanosec(0), _readSymlinkNanosec_withoutLoading(0),
#endif
_device(device), _open_files()
{
}
FilesystemImpl::~FilesystemImpl() {
#ifdef FSPP_PROFILE
std::ostringstream profilerInformation;
profilerInformation << "Profiler Information\n"
<< std::fixed << std::setprecision(6)
<< std::setw(40) << "LoadFile: " << static_cast<double>(_loadFileNanosec)/1000000000 << "\n"
<< std::setw(40) << "LoadDir: " << static_cast<double>(_loadDirNanosec)/1000000000 << "\n"
<< std::setw(40) << "LoadSymlink: " << static_cast<double>(_loadSymlinkNanosec)/1000000000 << "\n"
<< std::setw(40) << "OpenFile: " << static_cast<double>(_openFileNanosec)/1000000000 << "\n"
<< std::setw(40) << "Flush: " << static_cast<double>(_flushNanosec)/1000000000 << "\n"
<< std::setw(40) << "CloseFile: " << static_cast<double>(_closeFileNanosec)/1000000000 << "\n"
<< std::setw(40) << "Lstat: " << static_cast<double>(_lstatNanosec)/1000000000 << "\n"
<< std::setw(40) << "Fstat: " << static_cast<double>(_fstatNanosec)/1000000000 << "\n"
<< std::setw(40) << "Chmod: " << static_cast<double>(_chmodNanosec)/1000000000 << "\n"
<< std::setw(40) << "Chown: " << static_cast<double>(_chownNanosec)/1000000000 << "\n"
<< std::setw(40) << "Truncate: " << static_cast<double>(_truncateNanosec)/1000000000 << "\n"
<< std::setw(40) << "Ftruncate: " << static_cast<double>(_ftruncateNanosec)/1000000000 << "\n"
<< std::setw(40) << "Read: " << static_cast<double>(_readNanosec)/1000000000 << "\n"
<< std::setw(40) << "Write: " << static_cast<double>(_writeNanosec)/1000000000 << "\n"
<< std::setw(40) << "Fsync: " << static_cast<double>(_fsyncNanosec)/1000000000 << "\n"
<< std::setw(40) << "Fdatasync: " << static_cast<double>(_fdatasyncNanosec)/1000000000 << "\n"
<< std::setw(40) << "Access: " << static_cast<double>(_accessNanosec)/1000000000 << "\n"
<< std::setw(40) << "CreateAndOpenFile: " << static_cast<double>(_createAndOpenFileNanosec)/1000000000 << "\n"
<< std::setw(40) << "CreateAndOpenFile (without loading): " << static_cast<double>(_createAndOpenFileNanosec_withoutLoading)/1000000000 << "\n"
<< std::setw(40) << "Mkdir: " << static_cast<double>(_mkdirNanosec)/1000000000 << "\n"
<< std::setw(40) << "Mkdir (without loading): " << static_cast<double>(_mkdirNanosec_withoutLoading)/1000000000 << "\n"
<< std::setw(40) << "Rmdir: " << static_cast<double>(_rmdirNanosec)/1000000000 << "\n"
<< std::setw(40) << "Rmdir (without loading): " << static_cast<double>(_rmdirNanosec_withoutLoading)/1000000000 << "\n"
<< std::setw(40) << "Unlink: " << static_cast<double>(_unlinkNanosec)/1000000000 << "\n"
<< std::setw(40) << "Unlink (without loading): " << static_cast<double>(_unlinkNanosec_withoutLoading)/1000000000 << "\n"
<< std::setw(40) << "Rename: " << static_cast<double>(_renameNanosec)/1000000000 << "\n"
<< std::setw(40) << "ReadDir: " << static_cast<double>(_readDirNanosec)/1000000000 << "\n"
<< std::setw(40) << "ReadDir (without loading): " << static_cast<double>(_readDirNanosec_withoutLoading)/1000000000 << "\n"
<< std::setw(40) << "Utimens: " << static_cast<double>(_utimensNanosec)/1000000000 << "\n"
<< std::setw(40) << "Statfs: " << static_cast<double>(_statfsNanosec)/1000000000 << "\n"
<< std::setw(40) << "CreateSymlink: " << static_cast<double>(_createSymlinkNanosec)/1000000000 << "\n"
<< std::setw(40) << "CreateSymlink (without loading): " << static_cast<double>(_createSymlinkNanosec_withoutLoading)/1000000000 << "\n"
<< std::setw(40) << "ReadSymlink: " << static_cast<double>(_readSymlinkNanosec)/1000000000 << "\n"
<< std::setw(40) << "ReadSymlink (without loading): " << static_cast<double>(_readSymlinkNanosec_withoutLoading)/1000000000 << "\n";
LOG(INFO) << profilerInformation.str();
#endif
}
unique_ref<File> FilesystemImpl::LoadFile(const bf::path &path) {
PROFILE(_loadFileNanosec);
auto node = _device->Load(path);
if (node == none) {
throw fuse::FuseErrnoException(EIO);
}
auto file = dynamic_pointer_move<File>(*node);
if (file == none) {
throw fuse::FuseErrnoException(EISDIR);
}
return std::move(*file);
}
unique_ref<Dir> FilesystemImpl::LoadDir(const bf::path &path) {
PROFILE(_loadDirNanosec);
auto node = _device->Load(path);
if (node == none) {
throw fuse::FuseErrnoException(EIO);
}
auto dir = dynamic_pointer_move<Dir>(*node);
if (dir == none) {
throw fuse::FuseErrnoException(ENOTDIR);
}
return std::move(*dir);
}
unique_ref<Symlink> FilesystemImpl::LoadSymlink(const bf::path &path) {
PROFILE(_loadSymlinkNanosec);
auto node = _device->Load(path);
if (node == none) {
throw fuse::FuseErrnoException(EIO);
}
auto lnk = dynamic_pointer_move<Symlink>(*node);
if (lnk == none) {
throw fuse::FuseErrnoException(ENOTDIR);
}
return std::move(*lnk);
}
unique_ref<Node> FilesystemImpl::LoadFileOrSymlink(const bf::path &path) {
PROFILE(_loadFileOrSymlinkNanosec);
auto node = _device->Load(path);
if (node == none) {
throw fuse::FuseErrnoException(EIO);
}
auto file = dynamic_pointer_move<File>(*node);
if (file != none) {
return std::move(*file);
}
auto symlink = dynamic_pointer_move<Symlink>(*node);
if (symlink != none) {
return std::move(*symlink);
}
throw fuse::FuseErrnoException(EISDIR);
}
int FilesystemImpl::openFile(const bf::path &path, int flags) {
auto file = LoadFile(path);
return openFile(*file, flags);
}
int FilesystemImpl::openFile(const File &file, int flags) {
PROFILE(_openFileNanosec);
return _open_files.open(file.open(flags));
}
void FilesystemImpl::flush(int descriptor) {
PROFILE(_flushNanosec);
_open_files.get(descriptor)->flush();
}
void FilesystemImpl::closeFile(int descriptor) {
PROFILE(_closeFileNanosec);
_open_files.close(descriptor);
}
void FilesystemImpl::lstat(const bf::path &path, struct ::stat *stbuf) {
PROFILE(_lstatNanosec);
auto node = _device->Load(path);
if(node == none) {
throw fuse::FuseErrnoException(ENOENT);
} else {
(*node)->stat(stbuf);
}
}
void FilesystemImpl::fstat(int descriptor, struct ::stat *stbuf) {
PROFILE(_fstatNanosec);
_open_files.get(descriptor)->stat(stbuf);
}
void FilesystemImpl::chmod(const boost::filesystem::path &path, mode_t mode) {
PROFILE(_chmodNanosec);
auto node = _device->Load(path);
if(node == none) {
throw fuse::FuseErrnoException(ENOENT);
} else {
(*node)->chmod(mode);
}
}
void FilesystemImpl::chown(const boost::filesystem::path &path, uid_t uid, gid_t gid) {
PROFILE(_chownNanosec);
auto node = _device->Load(path);
if(node == none) {
throw fuse::FuseErrnoException(ENOENT);
} else {
(*node)->chown(uid, gid);
}
}
void FilesystemImpl::truncate(const bf::path &path, off_t size) {
PROFILE(_truncateNanosec);
LoadFile(path)->truncate(size);
}
void FilesystemImpl::ftruncate(int descriptor, off_t size) {
PROFILE(_ftruncateNanosec);
_open_files.get(descriptor)->truncate(size);
}
size_t FilesystemImpl::read(int descriptor, void *buf, size_t count, off_t offset) {
PROFILE(_readNanosec);
return _open_files.get(descriptor)->read(buf, count, offset);
}
void FilesystemImpl::write(int descriptor, const void *buf, size_t count, off_t offset) {
PROFILE(_writeNanosec);
_open_files.get(descriptor)->write(buf, count, offset);
}
void FilesystemImpl::fsync(int descriptor) {
PROFILE(_fsyncNanosec);
_open_files.get(descriptor)->fsync();
}
void FilesystemImpl::fdatasync(int descriptor) {
PROFILE(_fdatasyncNanosec);
_open_files.get(descriptor)->fdatasync();
}
void FilesystemImpl::access(const bf::path &path, int mask) {
PROFILE(_accessNanosec);
auto node = _device->Load(path);
if(node == none) {
throw fuse::FuseErrnoException(ENOENT);
} else {
(*node)->access(mask);
}
}
int FilesystemImpl::createAndOpenFile(const bf::path &path, mode_t mode, uid_t uid, gid_t gid) {
PROFILE(_createAndOpenFileNanosec);
auto dir = LoadDir(path.parent_path());
PROFILE(_createAndOpenFileNanosec_withoutLoading);
auto file = dir->createAndOpenFile(path.filename().native(), mode, uid, gid);
return _open_files.open(std::move(file));
}
void FilesystemImpl::mkdir(const bf::path &path, mode_t mode, uid_t uid, gid_t gid) {
PROFILE(_mkdirNanosec);
auto dir = LoadDir(path.parent_path());
PROFILE(_mkdirNanosec_withoutLoading);
dir->createDir(path.filename().native(), mode, uid, gid);
}
void FilesystemImpl::rmdir(const bf::path &path) {
PROFILE(_rmdirNanosec);
auto dir = LoadDir(path);
PROFILE(_rmdirNanosec_withoutLoading);
dir->remove();
}
void FilesystemImpl::unlink(const bf::path &path) {
PROFILE(_unlinkNanosec);
auto node = LoadFileOrSymlink(path);
PROFILE(_unlinkNanosec_withoutLoading);
node->remove();
}
void FilesystemImpl::rename(const bf::path &from, const bf::path &to) {
PROFILE(_renameNanosec);
auto node = _device->Load(from);
if(node == none) {
throw fuse::FuseErrnoException(ENOENT);
} else {
(*node)->rename(to);
}
}
unique_ref<vector<Dir::Entry>> FilesystemImpl::readDir(const bf::path &path) {
PROFILE(_readDirNanosec);
auto dir = LoadDir(path);
PROFILE(_readDirNanosec_withoutLoading);
return dir->children();
}
void FilesystemImpl::utimens(const bf::path &path, const timespec times[2]) {
PROFILE(_utimensNanosec);
auto node = _device->Load(path);
if(node == none) {
throw fuse::FuseErrnoException(ENOENT);
} else {
(*node)->utimens(times);
}
}
void FilesystemImpl::statfs(const bf::path &path, struct statvfs *fsstat) {
PROFILE(_statfsNanosec);
_device->statfs(path, fsstat);
}
void FilesystemImpl::createSymlink(const bf::path &to, const bf::path &from, uid_t uid, gid_t gid) {
PROFILE(_createSymlinkNanosec);
auto parent = LoadDir(from.parent_path());
PROFILE(_createSymlinkNanosec_withoutLoading);
parent->createSymlink(from.filename().native(), to, uid, gid);
}
void FilesystemImpl::readSymlink(const bf::path &path, char *buf, size_t size) {
PROFILE(_readSymlinkNanosec);
string target = LoadSymlink(path)->target().native();
PROFILE(_readSymlinkNanosec_withoutLoading);
std::memcpy(buf, target.c_str(), std::min(target.size()+1, size));
buf[size-1] = '\0';
}