static int read_block_raw(struct hlfs_ctrl *ctrl,uint32_t storage_address,char* block_buf)
{
//HLOG_DEBUG("enter func %s", __func__);
uint32_t block_size = ctrl->sb.block_size;
struct back_storage * storage =NULL;
uint32_t offset = get_offset(storage_address);
uint32_t segno = get_segno(storage_address);
if(segno >= ctrl->start_segno){
storage = ctrl->storage;
}else{
if(NULL == (storage = get_parent_storage(ctrl->family,segno))){
return -1;
}
}
int ret = read_block(storage,storage_address,block_size,block_buf);
//HLOG_DEBUG("leave func %s", __func__);
return ret;
}
int prev_open_rsegfile(struct hlfs_ctrl *ctrl, uint32_t segno){
//HLOG_DEBUG("enter func %s", __func__);
struct back_storage *storage = NULL;
if (NULL == ctrl->last_rsegfile_handler) {
char segfile_name[SEGMENT_FILE_NAME_MAX];
memset((void *)segfile_name, 0, SEGMENT_FILE_NAME_MAX);
build_segfile_name(segno, segfile_name);
bs_file_t file;
if (segno >= ctrl->start_segno) {
storage = ctrl->storage;
}else{
HLOG_DEBUG("get parent storage for segno:%d",segno);
if (NULL == (storage = get_parent_storage(ctrl->family, segno))){
g_assert(0);
return -1;
}
}
file = storage->bs_file_open(storage, segfile_name, BS_READONLY);
if (file == NULL) {
HLOG_ERROR("can not open segment file %s", segfile_name);
g_assert(0);
return -1;
}
ctrl->last_rsegfile_handler = file;
ctrl->last_rsegfile_offset = ctrl->last_offset;
ctrl->last_read_segno =segno;
}else if (ctrl->last_read_segno != segno || (ctrl->last_read_segno == \
segno && ctrl->last_rsegfile_offset != ctrl->last_offset)){
HLOG_DEBUG("cur segno:%d is, last segno no:%d, \
last rsegfile offset:%d, last offset:%d,start_segno:%d - \
need close old and open new segfile", segno, \
ctrl->last_read_segno,ctrl->last_rsegfile_offset, \
ctrl->last_offset, ctrl->start_segno);
/* close last seg file handler... */
if (ctrl->last_read_segno >= ctrl->start_segno) {
storage = ctrl->storage;
}else{
HLOG_DEBUG("get parent storage for segno:%d",segno);
if (NULL == (storage = get_parent_storage(ctrl->family, \
ctrl->last_read_segno))){
g_assert(0);
return -1;
}
}
if (0 != storage->bs_file_close(storage, ctrl->last_rsegfile_handler)) {
g_assert(0);
return -1;
}
/* open cur seg file handler... */
const char segfile_name[SEGMENT_FILE_NAME_MAX];
build_segfile_name(segno, segfile_name);
if (segno >= ctrl->start_segno) {
storage = ctrl->storage;
}else{
HLOG_DEBUG("get parent storage for segno:%d", segno);
if (NULL == (storage = get_parent_storage(ctrl->family, segno))) {
g_assert(0);
return -1;
}
}
bs_file_t file = storage->bs_file_open(storage, segfile_name,\
BS_READONLY);
if (file == NULL) {
HLOG_ERROR("can not open segment file %s", segfile_name);
g_assert(0);
return -1;
}
ctrl->last_rsegfile_handler = file;
ctrl->last_rsegfile_offset = ctrl->last_offset;
ctrl->last_read_segno = segno;
}else{
/*
* hlfs_open: open a file.
* @param ctrl: the global control.
* @param flag: the flag for open operation, flag == 0
* readonly and flag == 1 writable.
* @return: if successful return 0, else return -1.
*/
int hlfs_open(struct hlfs_ctrl *ctrl, int flag)
{
HLOG_DEBUG("enter func %s", __func__);
if (ctrl == NULL ||(flag != 0 && flag != 1)) { /* check the parameters */
HLOG_ERROR("error params :flag %d", flag);
return -1;
}
if (1 == flag) {
ctrl->rw_inode_flag = 1;
} else if (0 == flag) {
ctrl->rw_inode_flag = 0;
} else {
HLOG_ERROR("the bad flag for hlfs open by inode");
return -1;
}
if (ctrl->usage_ref > 0) {
HLOG_DEBUG("This fs has opened by other,can not use it");
return -1;
}
int ret = 0;
HLOG_DEBUG("inode no %llu , inode address %llu", ctrl->imap_entry.inode_no, ctrl->imap_entry.inode_addr);
if (ctrl->imap_entry.inode_no == 0 && ctrl->imap_entry.inode_addr == 0) { /* no inode condition */
HLOG_DEBUG("empty filesystem %s", ctrl->sb.fsname);
if (flag == 0) {
HLOG_ERROR("must create it with writeable flag");
return -1;
}
HLOG_DEBUG("create new fs inode !");
ctrl->inode.length = 0;
ctrl->inode.mtime = get_current_time();
//ctrl->inode.ctime = get_current_time();
//ctrl->inode.atime = get_current_time();
} else { /* exist inode */
HLOG_DEBUG("this is not empty filesystem:%s", ctrl->sb.fsname);
struct back_storage *storage = NULL;
uint32_t segno = get_segno(ctrl->imap_entry.inode_addr);
if (segno >= ctrl->start_segno) {
storage = ctrl->storage;
}else{
HLOG_DEBUG("get parent storage for segno:%d", segno);
if (NULL == (storage = \
get_parent_storage(ctrl->family, segno))){
g_assert(0);
return -1;
}
}
struct inode *my_inode = NULL;
my_inode = load_inode(storage, ctrl->imap_entry.inode_addr);
if (my_inode == NULL) {
HLOG_ERROR("load_inode error!");
return -1;
}
HLOG_DEBUG("inode'length:%llu, ctrl->inode length:%llu, \
sizeof inode:%d",my_inode->length,ctrl->inode.length, \
sizeof(struct inode));
memcpy(&(ctrl->inode), my_inode, sizeof(struct inode));
g_free(my_inode);
}
HLOG_DEBUG("ctrl->rw_inode_flag:%d", ctrl->rw_inode_flag);
struct snapshot *ss;
if (0 == ctrl->storage->bs_file_is_exist(ctrl->storage, \
SNAPSHOT_FILE)) {
ret = find_latest_alive_snapshot(ctrl->storage, \
ALIVE_SNAPSHOT_FILE, SNAPSHOT_FILE, &ss);
if (ret != 0) {
HLOG_DEBUG("can not read alive snapshot, \
there must be some error");
return -1;
}