Function ztest_fletcher

freebsd/contrib/openzfs/cmd/ztest/ztest.c:6238–6305

}

void
ztest_fletcher(ztest_ds_t *zd, uint64_t id)
{
	hrtime_t end = gethrtime() + NANOSEC;

	while (gethrtime() <= end) {
		int run_count = 100;
		void *buf;
		struct abd *abd_data, *abd_meta;
		uint32_t size;
		int *ptr;
		int i;
		zio_cksum_t zc_ref;
		zio_cksum_t zc_ref_byteswap;

		size = ztest_random_blocksize();

		buf = umem_alloc(size, UMEM_NOFAIL);
		abd_data = abd_alloc(size, B_FALSE);
		abd_meta = abd_alloc(size, B_TRUE);

		for (i = 0, ptr = buf; i < size / sizeof (*ptr); i++, ptr++)
			*ptr = ztest_random(UINT_MAX);

		abd_copy_from_buf_off(abd_data, buf, 0, size);
		abd_copy_from_buf_off(abd_meta, buf, 0, size);

		VERIFY0(fletcher_4_impl_set("scalar"));
		fletcher_4_native(buf, size, NULL, &zc_ref);
		fletcher_4_byteswap(buf, size, NULL, &zc_ref_byteswap);

		VERIFY0(fletcher_4_impl_set("cycle"));
		while (run_count-- > 0) {
			zio_cksum_t zc;
			zio_cksum_t zc_byteswap;

			fletcher_4_byteswap(buf, size, NULL, &zc_byteswap);
			fletcher_4_native(buf, size, NULL, &zc);

			VERIFY0(bcmp(&zc, &zc_ref, sizeof (zc)));
			VERIFY0(bcmp(&zc_byteswap, &zc_ref_byteswap,
			    sizeof (zc_byteswap)));

			/* Test ABD - data */
			abd_fletcher_4_byteswap(abd_data, size, NULL,
			    &zc_byteswap);
			abd_fletcher_4_native(abd_data, size, NULL, &zc);

			VERIFY0(bcmp(&zc, &zc_ref, sizeof (zc)));
			VERIFY0(bcmp(&zc_byteswap, &zc_ref_byteswap,
			    sizeof (zc_byteswap)));

			/* Test ABD - metadata */
			abd_fletcher_4_byteswap(abd_meta, size, NULL,
			    &zc_byteswap);
			abd_fletcher_4_native(abd_meta, size, NULL, &zc);

			VERIFY0(bcmp(&zc, &zc_ref, sizeof (zc)));