Function test14

dpdk/app/test/test_lpm.c:1000–1055

* For TBL8 extension exhaustion. Add 512 rules that require a tbl8 extension. * No more tbl8 extensions will be allowed. Now add one more rule that required * a tbl8 extension and get fail. * */

 * a tbl8 extension and get fail.
 * */
int32_t
test14(void)
{

	/* We only use depth = 32 in the loop below so we must make sure
	 * that we have enough storage for all rules at that depth*/

	struct rte_lpm *lpm = NULL;
	struct rte_lpm_config config;

	config.max_rules = 256 * 32;
	config.number_tbl8s = 512;
	config.flags = 0;
	uint32_t ip, next_hop_base, next_hop_return;
	uint8_t depth;
	int32_t status = 0;
	xmm_t ipx4;
	uint32_t hop[4];

	/* Add enough space for 256 rules for every depth */
	lpm = rte_lpm_create(__func__, SOCKET_ID_ANY, &config);
	TEST_LPM_ASSERT(lpm != NULL);

	depth = 32;
	next_hop_base = 100;
	ip = RTE_IPV4(0, 0, 0, 0);

	/* Add 256 rules that require a tbl8 extension */
	for (; ip <= RTE_IPV4(0, 1, 255, 0); ip += 256) {
		status = rte_lpm_add(lpm, ip, depth, next_hop_base + ip);
		TEST_LPM_ASSERT(status == 0);

		status = rte_lpm_lookup(lpm, ip, &next_hop_return);
		TEST_LPM_ASSERT((status == 0) &&
				(next_hop_return == next_hop_base + ip));

		ipx4 = vect_set_epi32(ip + 3, ip + 2, ip + 1, ip);
		rte_lpm_lookupx4(lpm, ipx4, hop, UINT32_MAX);
		TEST_LPM_ASSERT(hop[0] == next_hop_base + ip);
		TEST_LPM_ASSERT(hop[1] == UINT32_MAX);
		TEST_LPM_ASSERT(hop[2] == UINT32_MAX);
		TEST_LPM_ASSERT(hop[3] == UINT32_MAX);
	}

	/* All tbl8 extensions have been used above. Try to add one more and
	 * we get a fail */
	ip = RTE_IPV4(1, 0, 0, 0);
	depth = 32;

	status = rte_lpm_add(lpm, ip, depth, next_hop_base + ip);
	TEST_LPM_ASSERT(status < 0);

	rte_lpm_free(lpm);

	return PASS;
}

/*