hardcoresushi/libcryfs
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Implemented file operations using our class hierarchy

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This commit is contained in:
Sebastian Messmer 2014-11-10 23:47:41 +01:00
parent 80d708d62d
commit 6b8c205916
1 changed files with 72 additions and 32 deletions
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104
src/CryFuse.cpp
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@ -43,6 +43,7 @@ int CryFuse::fgetattr(const path &path, struct stat *stbuf, fuse_file_info *file
// opening it, and then using the FD for an fgetattr. So in the
// special case of a path of "/", I need to do a getattr on the
// underlying root directory instead of doing the fgetattr().
// TODO Check if necessary
if (path.native() == "/") {
return getattr(path, stbuf);
}
@ -55,6 +56,7 @@ int CryFuse::fgetattr(const path &path, struct stat *stbuf, fuse_file_info *file
}
}
//TODO
int CryFuse::readlink(const path &path, char *buf, size_t size) {
//printf("readlink(%s, _, %zu)\n", path.c_str(), size);
auto real_path = _device->RootDir() / path;
@ -78,6 +80,7 @@ int CryFuse::mknod(const path &path, mode_t mode, dev_t rdev) {
return 0;
}
//TODO
int CryFuse::mkdir(const path &path, mode_t mode) {
//printf("mkdir(%s, %d)\n", path.c_str(), mode);
auto real_path = _device->RootDir() / path;
@ -85,6 +88,7 @@ int CryFuse::mkdir(const path &path, mode_t mode) {
return errcode_map(retstat);
}
//TODO
int CryFuse::unlink(const path &path) {
//printf("unlink(%s)\n", path.c_str());
auto real_path = _device->RootDir() / path;
@ -92,6 +96,7 @@ int CryFuse::unlink(const path &path) {
return errcode_map(retstat);
}
//TODO
int CryFuse::rmdir(const path &path) {
//printf("rmdir(%s)\n", path.c_str());
auto real_path = _device->RootDir() / path;
@ -99,6 +104,7 @@ int CryFuse::rmdir(const path &path) {
return errcode_map(retstat);
}
//TODO
int CryFuse::symlink(const path &from, const path &to) {
//printf("symlink(%s, %s)\n", from.c_str(), to.c_str());
auto real_from = _device->RootDir() / from;
@ -107,6 +113,7 @@ int CryFuse::symlink(const path &from, const path &to) {
return errcode_map(retstat);
}
//TODO
int CryFuse::rename(const path &from, const path &to) {
//printf("rename(%s, %s)\n", from.c_str(), to.c_str());
auto real_from = _device->RootDir() / from;
@ -115,6 +122,7 @@ int CryFuse::rename(const path &from, const path &to) {
return errcode_map(retstat);
}
//TODO
int CryFuse::link(const path &from, const path &to) {
//printf("link(%s, %s)\n", from.c_str(), to.c_str());
auto real_from = _device->RootDir() / from;
@ -123,6 +131,7 @@ int CryFuse::link(const path &from, const path &to) {
return errcode_map(retstat);
}
//TODO
int CryFuse::chmod(const path &path, mode_t mode) {
//printf("chmod(%s, %d)\n", path.c_str(), mode);
auto real_path = _device->RootDir() / path;
@ -130,6 +139,7 @@ int CryFuse::chmod(const path &path, mode_t mode) {
return errcode_map(retstat);
}
//TODO
int CryFuse::chown(const path &path, uid_t uid, gid_t gid) {
//printf("chown(%s, %d, %d)\n", path.c_str(), uid, gid);
auto real_path = _device->RootDir() / path;
@ -139,18 +149,26 @@ int CryFuse::chown(const path &path, uid_t uid, gid_t gid) {
int CryFuse::truncate(const path &path, off_t size) {
//printf("truncate(%s, %zu)\n", path.c_str(), size);
auto real_path = _device->RootDir() / path;
int retstat = ::truncate(real_path.c_str(), size);
return errcode_map(retstat);
try {
_device->truncate(path, size);
return 0;
} catch (CryErrnoException &e) {
return -e.getErrno();
}
}
int CryFuse::ftruncate(const path &path, off_t size, fuse_file_info *fileinfo) {
//printf("ftruncate(%s, %zu, _)\n", path.c_str(), size);
UNUSED(path);
int retstat = ::ftruncate(fileinfo->fh, size);
return errcode_map(retstat);
try {
_device->ftruncate(fileinfo->fh, size);
return 0;
} catch (CryErrnoException &e) {
return -e.getErrno();
}
}
//TODO
int CryFuse::utimens(const path &path, const timespec times[2]) {
//printf("utimens(%s, _)\n", path.c_str());
auto real_path = _device->RootDir() / path;
@ -165,36 +183,48 @@ int CryFuse::utimens(const path &path, const timespec times[2]) {
int CryFuse::open(const path &path, fuse_file_info *fileinfo) {
//printf("open(%s, _)\n", path.c_str());
auto real_path = _device->RootDir() / path;
int fd = ::open(real_path.c_str(), fileinfo->flags);
if (fd < 0) {
return -errno;
try {
fileinfo->fh = _device->openFile(path, fileinfo->flags);
return 0;
} catch (CryErrnoException &e) {
return -e.getErrno();
}
fileinfo->fh = fd;
return 0;
}
int CryFuse::release(const path &path, fuse_file_info *fileinfo) {
//printf("release(%s, _)\n", path.c_str());
UNUSED(path);
int retstat = ::close(fileinfo->fh);
return errcode_map(retstat);
try {
_device->closeFile(fileinfo->fh);
return 0;
} catch (CryErrnoException &e) {
return -e.getErrno();
}
}
int CryFuse::read(const path &path, char *buf, size_t size, off_t offset, fuse_file_info *fileinfo) {
//printf("read(%s, _, %zu, %zu, _)\n", path.c_str(), size, offset);
UNUSED(path);
int retstat = ::pread(fileinfo->fh, buf, size, offset);
return errcode_map(retstat);
try {
_device->read(fileinfo->fh, buf, size, offset);
return 0;
} catch (CryErrnoException &e) {
return -e.getErrno();
}
}
int CryFuse::write(const path &path, const char *buf, size_t size, off_t offset, fuse_file_info *fileinfo) {
//printf("write(%s, _, %zu, %zu, _)\n", path.c_str(), size, offset);
UNUSED(path);
int retstat = ::pwrite(fileinfo->fh, buf, size, offset);
return errcode_map(retstat);
try {
_device->write(fileinfo->fh, buf, size, offset);
return 0;
} catch (CryErrnoException &e) {
return -e.getErrno();
}
}
//TODO
int CryFuse::statfs(const path &path, struct statvfs *fsstat) {
//printf("statfs(%s, _)\n", path.c_str());
auto real_path = _device->RootDir() / path;
@ -202,6 +232,7 @@ int CryFuse::statfs(const path &path, struct statvfs *fsstat) {
return errcode_map(retstat);
}
//TODO
int CryFuse::flush(const path &path, fuse_file_info *fileinfo) {
//printf("Called non-implemented flush(%s, _)\n", path.c_str());
UNUSED(path);
@ -212,15 +243,19 @@ int CryFuse::flush(const path &path, fuse_file_info *fileinfo) {
int CryFuse::fsync(const path &path, int datasync, fuse_file_info *fileinfo) {
//printf("fsync(%s, %d, _)\n", path.c_str(), datasync);
UNUSED(path);
int retstat = 0;
if (datasync) {
retstat = ::fdatasync(fileinfo->fh);
} else {
retstat = ::fsync(fileinfo->fh);
try {
if (datasync) {
_device->fdatasync(fileinfo->fh);
} else {
_device->fsync(fileinfo->fh);
}
return 0;
} catch (CryErrnoException &e) {
return -e.getErrno();
}
return errcode_map(retstat);
}
//TODO
int CryFuse::opendir(const path &path, fuse_file_info *fileinfo) {
//printf("opendir(%s, _)\n", path.c_str());
auto real_path = _device->RootDir() / path;
@ -232,6 +267,7 @@ int CryFuse::opendir(const path &path, fuse_file_info *fileinfo) {
return 0;
}
//TODO
int CryFuse::readdir(const path &path, void *buf, fuse_fill_dir_t filler, off_t offset, fuse_file_info *fileinfo) {
//printf("readdir(%s, _, _, %zu, _)\n", path.c_str(), offset);
UNUSED(offset);
@ -252,6 +288,7 @@ int CryFuse::readdir(const path &path, void *buf, fuse_fill_dir_t filler, off_t
return 0;
}
//TODO
int CryFuse::releasedir(const path &path, fuse_file_info *fileinfo) {
//printf("releasedir(%s, _)\n", path.c_str());
UNUSED(path);
@ -259,6 +296,7 @@ int CryFuse::releasedir(const path &path, fuse_file_info *fileinfo) {
return errcode_map(retstat);
}
//TODO
int CryFuse::fsyncdir(const path &path, int datasync, fuse_file_info *fileinfo) {
UNUSED(fileinfo);
UNUSED(datasync);
@ -278,20 +316,22 @@ void CryFuse::destroy() {
int CryFuse::access(const path &path, int mask) {
//printf("access(%s, %d)\n", path.c_str(), mask);
auto real_path = _device->RootDir() / path;
int retstat = ::access(real_path.c_str(), mask);
return errcode_map(retstat);
try {
_device->access(path, mask);
return 0;
} catch (CryErrnoException &e) {
return -e.getErrno();
}
}
int CryFuse::create(const path &path, mode_t mode, fuse_file_info *fileinfo) {
//printf("create(%s, %d, _)\n", path.c_str(), mode);
auto real_path = _device->RootDir() / path;
int fd = ::creat(real_path.c_str(), mode);
if (fd < 0) {
return -errno;
try {
fileinfo->fh = _device->createFile(path, mode);
return 0;
} catch (CryErrnoException &e) {
return -e.getErrno();
}
fileinfo->fh = fd;
return 0;
}
} /* namespace cryfs */