nilfs_get_node_raw
int nilfs_get_node_raw(struct nilfs_device *nilfsdev, struct nilfs_mount *ump, uint64_t ino, struct nilfs_inode *inode, struct nilfs_node **nodep);
error = nilfs_get_node_raw(ump->nilfsdev, ump, ino, &inode, &node);
error = nilfs_get_node_raw(nilfsdev, NULL, NILFS_DAT_INO,
error = nilfs_get_node_raw(nilfsdev, NULL, NILFS_CPFILE_INO,
error = nilfs_get_node_raw(nilfsdev, NULL, NILFS_SUFILE_INO,
error = nilfs_get_node_raw(ump->nilfsdev, NULL, NILFS_IFILE_INO,