fuse_do_open
rc = fuse_do_open(&cc->fm, 0, file, 0);
err = fuse_do_open(fm, get_node_id(inode), file, true);
EXPORT_SYMBOL_GPL(fuse_do_open);
err = fuse_do_open(fm, get_node_id(inode), file, false);
int fuse_do_open(struct fuse_mount *fm, u64 nodeid, struct file *file,