bool server_base::load(const std::string& id) {
const std::string path = build_local_path(argv_, "jubatus", id);
std::ifstream ifs(path.c_str(), std::ios::binary);
if (!ifs) {
throw JUBATUS_EXCEPTION(jubatus::exception::runtime_error("cannot open input file")
<< jubatus::exception::error_file_name(path)
<< jubatus::exception::error_errno(errno));
}
try {
LOG(INFO) << "starting load from " << path;
std::vector<mixable0*> mixables = get_mixable_holder()->get_mixables();
for (size_t i = 0; i < mixables.size(); ++i) {
mixables[i]->clear();
mixables[i]->load(ifs);
}
ifs.close();
LOG(INFO) << "loaded from " << path;
} catch (const std::runtime_error& e) {
ifs.close();
LOG(ERROR) << "failed to load: " << path;
LOG(ERROR) << e.what();
throw;
}
return true;
}
/*! \brief Open version file Open version file for specified current file. If
the appropriate version already exists, it is opened. New version file is
created otherwise. \param denty Dentry of the file \param vol Volume of
the file */
int32_t version_create_file(internal_dentry dentry, volume vol)
{
string path;
string verpath;
int r;
struct stat st;
message(LOG_DEBUG, FACILITY_VERSION, "version_create_file\n");
build_local_path(&path, vol, dentry);
version_generate_filename(path.str, &verpath);
// is there any version we should use?
r = lstat(verpath.str, &st);
if (r == 0)
{
// open last version
message(LOG_DEBUG, FACILITY_VERSION, "open last version\n");
dentry->fh->version_fd = open(verpath.str, O_RDWR);
dentry->fh->version_path = xstrdup(verpath.str);
}
else
{
version_create_file_with_attr(verpath.str, dentry, vol, &path);
version_apply_retention(dentry, vol);
}
free(verpath.str);
free(path.str);
version_load_interval_tree(dentry->fh);
RETURN_INT(ZFS_OK);
}
bs_file_t local_file_open(struct back_storage *storage,const char *path,int flags){
//HLOG_DEBUG("local -- enter func %s", __func__);
char full_path[256];
build_local_path(full_path,storage->dir,storage->fs_name,path);
//HLOG_DEBUG("full path %s", full_path);
int fd=0;
if(flags == BS_READONLY){
fd = open(full_path,O_RDONLY);
}else if (flags == BS_WRITEABLE){
fd = open(full_path,O_APPEND|O_WRONLY,00700);
}else{
//HLOG_DEBUG("open with error flags:%d",flags);
return NULL;
}
if(fd == -1){
//HLOG_ERROR("open file error");
return NULL;
}
#if 0
bs_file_t file = (bs_file_t)g_malloc0(sizeof(int));
if (NULL == file) {
g_message("%s - Allocate Error!\n", __func__);
g_free(full_path);
return NULL;
}
*(int*)file = fd;
#endif
bs_file_t file = (bs_file_t)GINT_TO_POINTER(fd);
//HLOG_DEBUG("-----------fd is :%d,file:%p", fd,file);
return file;
}
int local_file_delete(struct back_storage *storage,const char* path){
//HLOG_DEBUG("local -- enter func %s", __func__);
char full_path[256];
build_local_path(full_path,storage->dir,storage->fs_name,path);
int ret = remove(full_path);
//HLOG_DEBUG("local -- leave func %s", __func__);
return ret;
}
bool server_base::load(const std::string& id) {
if (id == "") {
throw JUBATUS_EXCEPTION(
core::common::exception::runtime_error("empty id is not allowed"));
}
load_file_impl(*this, build_local_path(argv_, argv_.type, id), id);
return true;
}
std::map<std::string, std::string> server_base::save(const std::string& id) {
if (id == "") {
throw JUBATUS_EXCEPTION(
core::common::exception::runtime_error("empty id is not allowed"));
}
const std::string path = build_local_path(argv_, argv_.type, id);
LOG(INFO) << "starting save to " << path;
fp_holder fp(fopen(path.c_str(), "wb"));
if (fp.get() == 0) {
throw JUBATUS_EXCEPTION(
core::common::exception::runtime_error("cannot open output file")
<< core::common::exception::error_file_name(path)
<< core::common::exception::error_errno(errno));
}
int fd = fileno(fp.get());
if (flock(fd, LOCK_EX | LOCK_NB) < 0) { // try exclusive lock
throw
JUBATUS_EXCEPTION(core::common::exception::runtime_error(
"cannot get the lock of file; any RPC is saving to same file?")
<< core::common::exception::error_file_name(path)
<< core::common::exception::error_errno(errno));
}
try {
framework::save_server(fp.get(), *this, id);
if (fp.close()) {
goto write_failure;
}
} catch (const std::ios_base::failure&) {
goto write_failure;
}
// putting error handling code here is to prevent skipping variable
// initialization. skipping variable declaration causes undefined behavior.
if (0) {
write_failure:
int tmperrno = errno;
if (remove(path.c_str()) < 0) {
LOG(WARNING) << "failed to cleanup dirty model file: " << path << ": "
<< jubatus::util::system::syscall::get_error_msg(errno);
}
throw JUBATUS_EXCEPTION(
core::common::exception::runtime_error("cannot write output file")
<< core::common::exception::error_file_name(path)
<< core::common::exception::error_errno(tmperrno));
}
update_saved_status(path);
LOG(INFO) << "saved to " << path;
std::map<std::string, std::string> ret;
ret.insert(std::make_pair(get_server_identifier(argv_), path));
return ret;
}
int local_file_is_exist(struct back_storage * storage,const char *path){
//HLOG_DEBUG("local -- enter func %s", __func__);
char full_path[256];
build_local_path(full_path,storage->dir,storage->fs_name,path);
//HLOG_DEBUG("path:%sfull path %s",path,full_path);
if (!g_file_test(full_path,G_FILE_TEST_EXISTS)){
return -1;
}
//HLOG_DEBUG("local -- leave func %s", __func__);
return 0;
}
int local_file_mkdir(struct back_storage * storage,const char *dir_path){
//HLOG_DEBUG("local -- enter func %s", __func__);
char full_path[256];
build_local_path(full_path,storage->dir,storage->fs_name,dir_path);
// HLOG_DEBUG("full path is %s",full_path);
if(0!=g_mkdir(full_path,00700)){
//HLOG_ERROR("g_mkdir error");
return -1;
}
//HLOG_DEBUG("local -- leave func %s", __func__);
return 0;
}
// this function only read dir, is compleet?
int32_t version_apply_retention(internal_dentry dentry, volume vol)
{
string dpath;
int32_t r;
acquire_dentry(dentry->parent);
build_local_path(&dpath, vol, dentry->parent);
release_dentry(dentry->parent);
ZFS_DIR * dirp = zfs_opendir(dpath.str);
free(dpath.str);
if (dirp == NULL)
{
RETURN_INT(errno);
}
/* Create a list of all versions for specified file. */
while (0)
{
zfs_dirent entry, *de;
r = zfs_readdir_r(dirp, &entry, &de);
if (r > 0) // zfs_readdir_r has failed
{
zfs_closedir(dirp);
RETURN_INT(r);
}
else if (r == 0 && de == NULL) // end of list
{
break;
}
//DO NOTTING HILL PLEASE
}
zfs_closedir(dirp);
/* Sort versions. */
/* Process from the oldest and check if it violates any maximum, while
complying with minimums. Delete such versions. */
// xstrconcat(dpath.str, DIRECTORY_SEPARATOR, name, NULL);
// unlink()
RETURN_INT(ZFS_OK);
}
bs_file_t local_file_create(struct back_storage *storage,const char *path){
//HLOG_DEBUG("local -- enter func %s", __func__);
char full_path[256];
build_local_path(full_path,storage->dir,storage->fs_name,path);
//HLOG_DEBUG("full path:%s", full_path);
int fd = g_creat(full_path,00700);
#if 0
bs_file_t file = (bs_file_t)g_malloc0(sizeof(int));
if (NULL == file) {
g_message("%s - build local path error!\n", __func__);
g_free(full_path);
return NULL;
}
*(int*)file = fd;
#endif
bs_file_t file = (bs_file_t)GINT_TO_POINTER(fd);
//HLOG_DEBUG("local -- leave func %s", __func__);
return file;
}
bs_file_info_t *
local_file_info(struct back_storage *storage,const char* path){
//HLOG_DEBUG("local -- enter func %s", __func__);
char full_path[256];
build_local_path(full_path,storage->dir,storage->fs_name,path);
struct stat buf;
int res=lstat(full_path,&buf);
bs_file_info_t *info = NULL;
if(res != 0){
//HLOG_ERROR("lstat error");
return NULL;
}
info = (bs_file_info_t*)g_malloc0(sizeof(bs_file_info_t));
strcpy((char *) info->name,path);
info->is_dir = g_file_test (full_path, G_FILE_TEST_IS_DIR);
info->size = buf.st_size;
info->lmtime = buf.st_mtime;
//HLOG_DEBUG("local -- leave func %s", __func__);
return info;
}
bs_file_info_t*
local_list_dir(struct back_storage * storage,const char * dir_path,uint32_t* num_entries){
//HLOG_DEBUG("local -- enter func %s", __func__);
char full_path[256];
build_local_path(full_path,storage->dir,storage->fs_name,dir_path);
GDir * dir = g_dir_open(full_path,0,NULL);
if(dir==NULL){
//HLOG_ERROR("g_dir_open error");
return NULL;
}
struct stat buf;
bs_file_info_t * infos = (bs_file_info_t*)g_malloc0(sizeof(bs_file_info_t)*8192);
if (NULL == infos) {
//HLOG_ERROR("build local path error!");
return NULL;
}
const gchar *filename;
bs_file_info_t *info = infos;
int idx=0;
while((filename = g_dir_read_name(dir)) != NULL) {
gchar *file_path = g_build_filename(full_path,filename,NULL);
int res=lstat(file_path,&buf);
if (0 != res) {
g_free(file_path);
g_free(infos);
//g_dir_close(dir);
HLOG_ERROR("lstat error");
return NULL;
}
strcpy((char *) info->name,filename);
info->is_dir = g_file_test(file_path, G_FILE_TEST_IS_DIR);
info->size = buf.st_size;
info->lmtime = buf.st_mtime;
info++;
idx++;
}
*num_entries = idx;
g_dir_close(dir);
//HLOG_DEBUG("local -- leave func %s", __func__);
return infos;
}
bool server_base::save(const std::string& id) {
const std::string path = build_local_path(argv_, "jubatus", id);
std::ofstream ofs(path.c_str(), std::ios::trunc | std::ios::binary);
if (!ofs) {
throw
JUBATUS_EXCEPTION(
core::common::exception::runtime_error("cannot open output file")
<< core::common::exception::error_file_name(path)
<< core::common::exception::error_errno(errno));
}
try {
LOG(INFO) << "starting save to " << path;
framework::save_server(ofs, *this, id);
ofs.close();
LOG(INFO) << "saved to " << path;
} catch (const std::runtime_error& e) {
LOG(ERROR) << "failed to save: " << path;
LOG(ERROR) << e.what();
throw;
}
return true;
}
/*! \brief Delete version file Delete version file and its respective
interval file. \param dir Dentry of the directory the file is in \param
vol Volume the file is on \param name Name of the file */
bool version_retent_file(internal_dentry dir, volume vol, char *name)
{
string path;
char *dst;
acquire_dentry(dir);
zfsd_mutex_lock(&vol->mutex);
zfsd_mutex_lock(&fh_mutex);
build_local_path(&path, vol, dir);
release_dentry(dir);
zfsd_mutex_unlock(&vol->mutex);
zfsd_mutex_unlock(&fh_mutex);
dst = xstrconcat(path.str, DIRECTORY_SEPARATOR, name, NULL);
version_unlink_version_file(dst);
free(dst);
// file is deleted immediately
return true;
}
bool server_base::load(const std::string& id) {
load_file_impl(*this, build_local_path(argv_, "jubatus", id), id);
return true;
}
/*! \brief Create list of intervals for a file version Create list of
intervals together with version files these intervals are stored in that
create the whole content of a file version. List is created from interval
files during file open. Result is stored in the internal file handle.
\param dentry Dentry of the file \param vol Volume the file in on */
int32_t version_build_intervals(internal_dentry dentry, volume vol)
{
time_t stamp;
varray v;
char *sname;
char *p;
version_item *list;
unsigned int n, m;
unsigned int i, j;
string dpath;
bool r;
r = version_load_interval_tree(dentry->fh);
if (!r)
RETURN_INT(ZFS_OK);
// parse version file name
sname = xstrdup(dentry->name.str);
p = strchr(sname, VERSION_NAME_SPECIFIER_C);
if (!p)
{
free(sname);
RETURN_INT(ENOENT);
}
*p = '\0';
stamp = atoi(p + 1);
// get list of version files that newer than timestamp
zfsd_mutex_lock(&dentry->parent->fh->mutex);
build_local_path(&dpath, vol, dentry->parent);
zfsd_mutex_unlock(&dentry->parent->fh->mutex);
varray_create(&v, sizeof(version_item), 1);
version_browse_dir(dpath.str, sname, &stamp, NULL, &v);
free(sname);
n = VARRAY_USED(v);
list = (version_item *) xmalloc(n * sizeof(version_item));
for (i = 0; i < n; i++)
{
list[i] = VARRAY_ACCESS(v, i, version_item);
list[i].path =
xstrconcat(dpath.str, DIRECTORY_SEPARATOR, list[i].name, NULL);
}
varray_destroy(&v);
free(dpath.str);
// sort the list
qsort(list, n, sizeof(version_item), comp_version_items);
// get intervals for version files in the list
for (i = 0; i < n; i++)
{
// read
int fd;
char *ival;
if (!list[i].path)
continue;
ival = xstrconcat(list[i].path, VERSION_INTERVAL_FILE_ADD, NULL);
fd = open(ival, O_RDONLY);
free(ival);
if (fd > 0)
{
// read interval file
struct stat st;
list[i].intervals = interval_tree_create(1, NULL);
if (fstat(fd, &st) < 0)
{
CLEAR_VERSION_ITEM(list[i]);
}
else if (!interval_tree_read
(list[i].intervals, fd, st.st_size / sizeof(interval)))
CLEAR_VERSION_ITEM(list[i]);
close(fd);
}
else if (errno == ENOENT)
{
// complete file
i++;
break;
}
// invalid version file
else
CLEAR_VERSION_ITEM(list[i]);
}
// delete all redundant intervals
m = i;
for (j = i + 1; j < n; j++)
CLEAR_VERSION_ITEM(list[j]);
dentry->fh->version_list = list;
dentry->fh->version_list_length = m;
RETURN_INT(ZFS_OK);
}
