Function test

test/file-verify.c:325–501

}

static int test(struct io_uring *ring, const char *fname, int buffered,
		int vectored, int small_vecs, int registered, int provide)
{
	struct iovec vecs[READ_BATCH][MAX_VECS];
	struct io_uring_cqe *cqe;
	struct io_uring_sqe *sqe;
	void *buf[READ_BATCH];
	int ret, fd, flags;
	int i, j, nr_vecs;
	off_t off, voff;
	size_t left;

	if (registered) {
		assert(!provide);
		assert(!vectored && !small_vecs);
	}
	if (provide) {
		assert(!registered);
		assert(!vectored && !small_vecs);
	}

	flags = O_RDONLY;
	if (!buffered)
		flags |= O_DIRECT;
	fd = open(fname, flags);
	if (fd < 0) {
		if (errno == EINVAL || errno == EPERM || errno == EACCES)
			return T_EXIT_SKIP;
		perror("open");
		return 1;
	}

	if (do_punch(fd))
		return 1;

	if (vectored) {
		if (small_vecs)
			nr_vecs = MIN_VECS;
		else
			nr_vecs = MAX_VECS;

		for (j = 0; j < READ_BATCH; j++) {
			for (i = 0; i < nr_vecs; i++) {
				void *ptr;

				t_posix_memalign(&ptr, 4096, CHUNK_SIZE / nr_vecs);
				vecs[j][i].iov_base = ptr;
				vecs[j][i].iov_len = CHUNK_SIZE / nr_vecs;
			}
		}
	} else {
		for (j = 0; j < READ_BATCH; j++)
			t_posix_memalign(&buf[j], 4096, CHUNK_SIZE);
		nr_vecs = 0;
	}

	if (registered) {
		struct iovec v[READ_BATCH];