fuse_fs_mknod
ret = fuse_fs_mknod(fuse->fs, path, mode, va->va_rdev);
ret = fuse_fs_mknod(fuse->fs, path, mode | S_IFREG, 0);
int fuse_fs_mknod(struct fuse_fs* fs, const char* path, mode_t mode, dev_t rdev);