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libcryfs/src/fspp/impl/FilesystemImpl.cpp

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#include "FilesystemImpl.h"
#include <fcntl.h>
#include "../fs_interface/Device.h"
#include "../fs_interface/Dir.h"
#include "../fs_interface/Symlink.h"
#include "../fs_interface/FuseErrnoException.h"
#include "../fs_interface/File.h"
#include "../fs_interface/Node.h"
#include <cpp-utils/logging/logging.h>
#include <cpp-utils/pointer/unique_ref.h>
#include <cpp-utils/system/stat.h>
#include <sstream>
using namespace fspp;
using cpputils::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(cpputils::unique_ref<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(std::move(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
}
void FilesystemImpl::setContext(Context&& context) {
_device->setContext(std::move(context));
}
unique_ref<File> FilesystemImpl::LoadFile(const bf::path &path) {
PROFILE(_loadFileNanosec);
auto file = _device->LoadFile(path);
if (file == none) {
throw fuse::FuseErrnoException(EIO);
}
return std::move(*file);
}
unique_ref<Dir> FilesystemImpl::LoadDir(const bf::path &path) {
PROFILE(_loadDirNanosec);
auto dir = _device->LoadDir(path);
if (dir == none) {
throw fuse::FuseErrnoException(EIO);
}
return std::move(*dir);
}
unique_ref<Symlink> FilesystemImpl::LoadSymlink(const bf::path &path) {
PROFILE(_loadSymlinkNanosec);
auto lnk = _device->LoadSymlink(path);
if (lnk == none) {
throw fuse::FuseErrnoException(EIO);
}
return std::move(*lnk);
}
int FilesystemImpl::openFile(const bf::path &path, int flags) {
auto file = LoadFile(path);
return openFile(file.get(), flags);
}
int FilesystemImpl::openFile(File *file, int flags) {
PROFILE(_openFileNanosec);
return _open_files.open(file->open(fspp::openflags_t(flags)));
}
void FilesystemImpl::flush(int descriptor) {
PROFILE(_flushNanosec);
_open_files.load(descriptor, [](OpenFile* openFile) {
openFile->flush();
});
}
void FilesystemImpl::closeFile(int descriptor) {
PROFILE(_closeFileNanosec);
_open_files.close(descriptor);
}
namespace {
void convert_stat_info_(const fspp::Node::stat_info& input, fspp::fuse::STAT *output) {
output->st_nlink = input.nlink;
output->st_mode = input.mode.value();
output->st_uid = input.uid.value();
output->st_gid = input.gid.value();
output->st_size = input.size.value();
output->st_blocks = input.blocks;
output->st_atim = input.atime;
output->st_mtim = input.mtime;
output->st_ctim = input.ctime;
}
}
void FilesystemImpl::lstat(const bf::path &path, fspp::fuse::STAT *stbuf) {
PROFILE(_lstatNanosec);
auto node = _device->Load(path);
if(node == none) {
throw fuse::FuseErrnoException(ENOENT);
} else {
auto stat_info = (*node)->stat();
convert_stat_info_(stat_info, stbuf);
}
}
void FilesystemImpl::fstat(int descriptor, fspp::fuse::STAT *stbuf) {
PROFILE(_fstatNanosec);
auto stat_info = _open_files.load(descriptor, [] (OpenFile* openFile) {
return openFile->stat();
});
convert_stat_info_(stat_info, 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(fspp::mode_t(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(fspp::uid_t(uid), fspp::gid_t(gid));
}
}
void FilesystemImpl::truncate(const bf::path &path, fspp::num_bytes_t size) {
PROFILE(_truncateNanosec);
LoadFile(path)->truncate(size);
}
void FilesystemImpl::ftruncate(int descriptor, fspp::num_bytes_t size) {
PROFILE(_ftruncateNanosec);
_open_files.load(descriptor, [size] (OpenFile* openFile) {
openFile->truncate(size);
});
}
fspp::num_bytes_t FilesystemImpl::read(int descriptor, void *buf, fspp::num_bytes_t count, fspp::num_bytes_t offset) {
PROFILE(_readNanosec);
return _open_files.load(descriptor, [buf, count, offset] (OpenFile* openFile) {
return openFile->read(buf, count, offset);
});
}
void FilesystemImpl::write(int descriptor, const void *buf, fspp::num_bytes_t count, fspp::num_bytes_t offset) {
PROFILE(_writeNanosec);
return _open_files.load(descriptor, [buf, count, offset] (OpenFile* openFile) {
return openFile->write(buf, count, offset);
});
}
void FilesystemImpl::fsync(int descriptor) {
PROFILE(_fsyncNanosec);
_open_files.load(descriptor, [] (OpenFile* openFile) {
openFile->fsync();
});
}
void FilesystemImpl::fdatasync(int descriptor) {
PROFILE(_fdatasyncNanosec);
_open_files.load(descriptor, [] (OpenFile* openFile) {
openFile->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().string(), fspp::mode_t(mode), fspp::uid_t(uid), fspp::gid_t(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().string(), fspp::mode_t(mode), fspp::uid_t(uid), fspp::gid_t(gid));
}
void FilesystemImpl::rmdir(const bf::path &path) {
//TODO Don't allow removing files/symlinks with this
PROFILE(_rmdirNanosec);
auto node = _device->Load(path);
if(node == none) {
throw fuse::FuseErrnoException(ENOENT);
}
PROFILE(_rmdirNanosec_withoutLoading);
(*node)->remove();
}
void FilesystemImpl::unlink(const bf::path &path) {
//TODO Don't allow removing directories with this
PROFILE(_unlinkNanosec);
auto node = _device->Load(path);
if (node == none) {
throw fuse::FuseErrnoException(ENOENT);
}
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);
}
}
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, timespec lastAccessTime, timespec lastModificationTime) {
PROFILE(_utimensNanosec);
auto node = _device->Load(path);
if(node == none) {
throw fuse::FuseErrnoException(ENOENT);
} else {
(*node)->utimens(lastAccessTime, lastModificationTime);
}
}
void FilesystemImpl::statfs(struct ::statvfs *fsstat) {
PROFILE(_statfsNanosec);
Device::statvfs stat = _device->statfs();
fsstat->f_bsize = stat.blocksize;
fsstat->f_blocks = stat.num_total_blocks;
fsstat->f_bfree = stat.num_free_blocks;
fsstat->f_bavail = stat.num_available_blocks;
fsstat->f_files = stat.num_total_inodes;
fsstat->f_ffree = stat.num_free_inodes;
fsstat->f_favail = stat.num_available_inodes;
fsstat->f_namemax = stat.max_filename_length;
//f_frsize, f_favail, f_fsid and f_flag are ignored in fuse, see http://fuse.sourcearchive.com/documentation/2.7.0/structfuse__operations_4e765e29122e7b6b533dc99849a52655.html#4e765e29122e7b6b533dc99849a52655
fsstat->f_frsize = fsstat->f_bsize; // even though this is supposed to be ignored, macFUSE needs it.
}
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().string(), to, fspp::uid_t(uid), fspp::gid_t(gid));
}
void FilesystemImpl::readSymlink(const bf::path &path, char *buf, fspp::num_bytes_t size) {
PROFILE(_readSymlinkNanosec);
string target = LoadSymlink(path)->target().string();
PROFILE(_readSymlinkNanosec_withoutLoading);
std::memcpy(buf, target.c_str(), std::min(static_cast<int64_t>(target.size()+1), size.value()));
buf[size.value()-1] = '\0';
}
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