Function test_truncate

test/file-verify.c:76–239

}

static int test_truncate(struct io_uring *ring, const char *fname, int buffered,
			 int vectored, int provide_buf)
{
	struct io_uring_cqe *cqe;
	struct io_uring_sqe *sqe;
	struct iovec vec;
	struct stat sb;
	off_t punch_off, off, file_size;
	void *buf = NULL;
	int u_in_buf, i, ret, fd, first_pass = 1;
	unsigned int *ptr;

	if (buffered)
		fd = open(fname, O_RDWR);
	else
		fd = open(fname, O_DIRECT | O_RDWR);
	if (fd < 0) {
		if (!buffered && errno == EINVAL)
			return T_EXIT_SKIP;
		perror("open");
		return 1;
	}

	if (fstat(fd, &sb) < 0) {
		perror("stat");
		close(fd);
		return 1;
	}

	if (S_ISREG(sb.st_mode)) {
		file_size = sb.st_size;
	} else if (S_ISBLK(sb.st_mode)) {
		unsigned long long bytes;

		if (ioctl(fd, BLKGETSIZE64, &bytes) < 0) {
			perror("ioctl");
			close(fd);
			return 1;
		}
		file_size = bytes;
	} else {
		goto out;
	}

	if (file_size < CHUNK_SIZE)
		goto out;

	t_posix_memalign(&buf, 4096, CHUNK_SIZE);

	off = file_size - (CHUNK_SIZE / 2);
	punch_off = off + CHUNK_SIZE / 4;

	u_in_buf = CHUNK_SIZE / sizeof(unsigned int);
	ptr = buf;
	for (i = 0; i < u_in_buf; i++) {
		*ptr = i;
		ptr++;
	}