Function test18

dpdk/app/test/test_lpm.c:1222–1282

* Test for recycle of tbl8 * - step 1: add a rule with depth=28 (> 24) * - step 2: add a rule with same 24-bit prefix and depth=23 (< 24) * - step 3: delete the first rule * - step 4: check tbl8 is freed * - step 5: add a rule same as the first one (depth=28) * - step 6: check same tbl8 is allocated * - step 7: add a rule with same 24-bit prefix and depth=24 * - step 8: delete the

 *  - setp 11: check same tbl8 is allocated again
 */
int32_t
test18(void)
{
#define group_idx next_hop
	struct rte_lpm *lpm = NULL;
	struct rte_lpm_config config;
	uint32_t ip, next_hop;
	uint8_t depth;
	uint32_t tbl8_group_index;

	config.max_rules = MAX_RULES;
	config.number_tbl8s = NUMBER_TBL8S;
	config.flags = 0;

	lpm = rte_lpm_create(__func__, SOCKET_ID_ANY, &config);
	TEST_LPM_ASSERT(lpm != NULL);

	ip = RTE_IPV4(192, 168, 100, 100);
	depth = 28;
	next_hop = 1;
	rte_lpm_add(lpm, ip, depth, next_hop);

	TEST_LPM_ASSERT(lpm->tbl24[ip>>8].valid_group);
	tbl8_group_index = lpm->tbl24[ip>>8].group_idx;

	depth = 23;
	next_hop = 2;
	rte_lpm_add(lpm, ip, depth, next_hop);
	TEST_LPM_ASSERT(lpm->tbl24[ip>>8].valid_group);

	depth = 28;
	rte_lpm_delete(lpm, ip, depth);

	TEST_LPM_ASSERT(!lpm->tbl24[ip>>8].valid_group);

	next_hop = 3;
	rte_lpm_add(lpm, ip, depth, next_hop);

	TEST_LPM_ASSERT(lpm->tbl24[ip>>8].valid_group);
	TEST_LPM_ASSERT(tbl8_group_index == lpm->tbl24[ip>>8].group_idx);

	depth = 24;
	next_hop = 4;
	rte_lpm_add(lpm, ip, depth, next_hop);
	TEST_LPM_ASSERT(lpm->tbl24[ip>>8].valid_group);

	depth = 28;
	rte_lpm_delete(lpm, ip, depth);

	TEST_LPM_ASSERT(!lpm->tbl24[ip>>8].valid_group);

	next_hop = 5;
	rte_lpm_add(lpm, ip, depth, next_hop);

	TEST_LPM_ASSERT(lpm->tbl24[ip>>8].valid_group);
	TEST_LPM_ASSERT(tbl8_group_index == lpm->tbl24[ip>>8].group_idx);

	rte_lpm_free(lpm);