[dpdk-dev] [PATCH v3 3/3] test/hash: add additional thash tests

[Vladimir Medvedkin <vladimir.medvedkin@intel.com>]

This patch adds tests for predictable RSS feature.

Signed-off-by: Vladimir Medvedkin <vladimir.medvedkin@intel.com>
---
 app/test/test_thash.c | 469 +++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 463 insertions(+), 6 deletions(-)

diff --git a/app/test/test_thash.c b/app/test/test_thash.c
index a6aadd1..d8981fb 100644
--- a/app/test/test_thash.c
+++ b/app/test/test_thash.c
@@ -5,11 +5,15 @@
 #include <rte_common.h>
 #include <rte_eal.h>
 #include <rte_ip.h>
+#include <rte_random.h>
 
 #include "test.h"
 
 #include <rte_thash.h>
 
+#define HASH_MSK(reta_sz)	((1 << reta_sz) - 1)
+#define TUPLE_SZ	(RTE_THASH_V4_L4_LEN * 4)
+
 struct test_thash_v4 {
 	uint32_t	dst_ip;
 	uint32_t	src_ip;
@@ -75,7 +79,7 @@ uint8_t default_rss_key[] = {
 };
 
 static int
-test_thash(void)
+test_toeplitz_hash_calc(void)
 {
 	uint32_t i, j;
 	union rte_thash_tuple tuple;
@@ -100,7 +104,7 @@ test_thash(void)
 				RTE_THASH_V4_L4_LEN, default_rss_key);
 		if ((rss_l3 != v4_tbl[i].hash_l3) ||
 				(rss_l3l4 != v4_tbl[i].hash_l3l4))
-			return -1;
+			return -TEST_FAILED;
 		/*Calculate hash with converted key*/
 		rss_l3 = rte_softrss_be((uint32_t *)&tuple,
 				RTE_THASH_V4_L3_LEN, rss_key_be);
@@ -108,7 +112,7 @@ test_thash(void)
 				RTE_THASH_V4_L4_LEN, rss_key_be);
 		if ((rss_l3 != v4_tbl[i].hash_l3) ||
 				(rss_l3l4 != v4_tbl[i].hash_l3l4))
-			return -1;
+			return -TEST_FAILED;
 	}
 	for (i = 0; i < RTE_DIM(v6_tbl); i++) {
 		/*Fill ipv6 hdr*/
@@ -127,7 +131,7 @@ test_thash(void)
 				RTE_THASH_V6_L4_LEN, default_rss_key);
 		if ((rss_l3 != v6_tbl[i].hash_l3) ||
 				(rss_l3l4 != v6_tbl[i].hash_l3l4))
-			return -1;
+			return -TEST_FAILED;
 		/*Calculate hash with converted key*/
 		rss_l3 = rte_softrss_be((uint32_t *)&tuple,
 				RTE_THASH_V6_L3_LEN, rss_key_be);
@@ -135,9 +139,462 @@ test_thash(void)
 				RTE_THASH_V6_L4_LEN, rss_key_be);
 		if ((rss_l3 != v6_tbl[i].hash_l3) ||
 				(rss_l3l4 != v6_tbl[i].hash_l3l4))
-			return -1;
+			return -TEST_FAILED;
 	}
-	return 0;
+	return TEST_SUCCESS;
+}
+
+static int
+test_create_invalid(void)
+{
+	struct rte_thash_ctx *ctx;
+	int key_len = 40;
+	int reta_sz = 7;
+
+	ctx = rte_thash_init_ctx(NULL, key_len, reta_sz, NULL, 0);
+	RTE_TEST_ASSERT(ctx == NULL,
+		"Call succeeded with invalid parameters\n");
+
+	ctx = rte_thash_init_ctx("test", 0, reta_sz, NULL, 0);
+	RTE_TEST_ASSERT(ctx == NULL,
+		"Call succeeded with invalid parameters\n");
+
+	ctx = rte_thash_init_ctx(NULL, key_len, 1, NULL, 0);
+	RTE_TEST_ASSERT(ctx == NULL,
+		"Call succeeded with invalid parameters\n");
+
+	ctx = rte_thash_init_ctx(NULL, key_len, 17, NULL, 0);
+	RTE_TEST_ASSERT(ctx == NULL,
+		"Call succeeded with invalid parameters\n");
+
+	return TEST_SUCCESS;
+}
+
+static int
+test_multiple_create(void)
+{
+	struct rte_thash_ctx *ctx;
+	int key_len = 40;
+	int reta_sz = 7;
+	int i;
+
+	for (i = 0; i < 100; i++) {
+		ctx = rte_thash_init_ctx("test", key_len, reta_sz, NULL, 0);
+		RTE_TEST_ASSERT(ctx != NULL, "Can not create CTX\n");
+
+		rte_thash_free_ctx(ctx);
+	}
+
+	return TEST_SUCCESS;
+}
+
+static int
+test_free_null(void)
+{
+	struct rte_thash_ctx *ctx;
+
+	ctx = rte_thash_init_ctx("test", 40, 7, NULL, 0);
+	RTE_TEST_ASSERT(ctx != NULL, "Can not create CTX\n");
+
+	rte_thash_free_ctx(ctx);
+	rte_thash_free_ctx(NULL);
+
+	return TEST_SUCCESS;
+}
+
+static int
+test_add_invalid_helper(void)
+{
+	struct rte_thash_ctx *ctx;
+	const int key_len = 40;
+	int reta_sz = 7;
+	int ret;
+
+	ctx = rte_thash_init_ctx("test", key_len, reta_sz, NULL, 0);
+	RTE_TEST_ASSERT(ctx != NULL, "can not create thash ctx\n");
+
+	ret = rte_thash_add_helper(NULL, "test", reta_sz, 0);
+	RTE_TEST_ASSERT(ret == -EINVAL,
+		"Call succeeded with invalid parameters\n");
+
+	ret = rte_thash_add_helper(ctx, NULL, reta_sz, 0);
+	RTE_TEST_ASSERT(ret == -EINVAL,
+		"Call succeeded with invalid parameters\n");
+
+	ret = rte_thash_add_helper(ctx, "test", reta_sz - 1, 0);
+	RTE_TEST_ASSERT(ret == -EINVAL,
+		"Call succeeded with invalid parameters\n");
+
+	ret = rte_thash_add_helper(ctx, "test", reta_sz, key_len * 8);
+	RTE_TEST_ASSERT(ret == -EINVAL,
+		"Call succeeded with invalid parameters\n");
+
+	ret = rte_thash_add_helper(ctx, "first_range", reta_sz, 0);
+	RTE_TEST_ASSERT(ret == 0, "Can not create helper\n");
+
+	ret = rte_thash_add_helper(ctx, "first_range", reta_sz, 0);
+	RTE_TEST_ASSERT(ret == -EEXIST,
+		"Call succeeded with duplicated name\n");
+
+	/*
+	 * Create second helper with offset 3 * reta_sz.
+	 * Note first_range helper created range in key:
+	 * [0, 32 + length{= reta_sz} - 1), i.e [0, 37).
+	 * second range is [44, 81)
+	 */
+	ret = rte_thash_add_helper(ctx, "second_range", reta_sz,
+		32 +  2 * reta_sz);
+	RTE_TEST_ASSERT(ret == 0, "Can not create helper\n");
+
+	/*
+	 * Try to create overlapping with first_ and second_ ranges,
+	 * i.e. [6, 49)
+	 */
+	ret = rte_thash_add_helper(ctx, "third_range", 2 * reta_sz, reta_sz);
+	RTE_TEST_ASSERT(ret == -EEXIST,
+		"Call succeeded with overlapping ranges\n");
+
+	rte_thash_free_ctx(ctx);
+
+	return TEST_SUCCESS;
+}
+
+static int
+test_find_existing(void)
+{
+	struct rte_thash_ctx *ctx, *ret_ctx;
+
+	ctx = rte_thash_init_ctx("test", 40, 7, NULL, 0);
+	RTE_TEST_ASSERT(ctx != NULL, "can not create thash ctx\n");
+
+	ret_ctx = rte_thash_find_existing("test");
+	RTE_TEST_ASSERT(ret_ctx != NULL, "can not find existing ctx\n");
+
+	rte_thash_free_ctx(ctx);
+
+	return TEST_SUCCESS;
+}
+
+static int
+test_get_helper(void)
+{
+	struct rte_thash_ctx *ctx;
+	struct rte_thash_subtuple_helper *h;
+	int ret;
+
+	ctx = rte_thash_init_ctx("test", 40, 7, NULL, 0);
+	RTE_TEST_ASSERT(ctx != NULL, "Can not create thash ctx\n");
+
+	h = rte_thash_get_helper(NULL, "first_range");
+	RTE_TEST_ASSERT(h == NULL, "Call succeeded with invalid parameters\n");
+
+	h = rte_thash_get_helper(ctx, NULL);
+	RTE_TEST_ASSERT(h == NULL, "Call succeeded with invalid parameters\n");
+
+	ret = rte_thash_add_helper(ctx, "first_range", 8, 0);
+	RTE_TEST_ASSERT(ret == 0, "Can not create helper\n");
+
+	h = rte_thash_get_helper(ctx, "first_range");
+	RTE_TEST_ASSERT(h != NULL, "Can not find helper\n");
+
+	rte_thash_free_ctx(ctx);
+
+	return TEST_SUCCESS;
+}
+
+static int
+test_period_overflow(void)
+{
+	struct rte_thash_ctx *ctx;
+	int reta_sz = 7; /* reflects polynomial degree */
+	int ret;
+
+	/* first create without RTE_THASH_IGNORE_PERIOD_OVERFLOW flag */
+	ctx = rte_thash_init_ctx("test", 40, reta_sz, NULL, 0);
+	RTE_TEST_ASSERT(ctx != NULL, "Can not create thash ctx\n");
+
+	/* requested range > (2^reta_sz) - 1 */
+	ret = rte_thash_add_helper(ctx, "test", (1 << reta_sz), 0);
+	RTE_TEST_ASSERT(ret == -ENOSPC,
+		"Call succeeded with invalid parameters\n");
+
+	/* requested range == len + 32 - 1, smaller than (2^reta_sz) - 1 */
+	ret = rte_thash_add_helper(ctx, "test", (1 << reta_sz) - 32, 0);
+	RTE_TEST_ASSERT(ret == 0, "Can not create helper\n");
+
+	rte_thash_free_ctx(ctx);
+
+	/* create with RTE_THASH_IGNORE_PERIOD_OVERFLOW flag */
+	ctx = rte_thash_init_ctx("test", 40, reta_sz, NULL,
+		RTE_THASH_IGNORE_PERIOD_OVERFLOW);
+	RTE_TEST_ASSERT(ctx != NULL, "Can not create thash ctx\n");
+
+	/* requested range > (2^reta_sz - 1) */
+	ret = rte_thash_add_helper(ctx, "test", (1 << reta_sz) + 10, 0);
+	RTE_TEST_ASSERT(ret == 0, "Can not create helper\n");
+
+	rte_thash_free_ctx(ctx);
+
+	return TEST_SUCCESS;
+}
+
+static int
+test_predictable_rss_min_seq(void)
+{
+	struct rte_thash_ctx *ctx;
+	struct rte_thash_subtuple_helper *h;
+	const int key_len = 40;
+	int reta_sz = 6;
+	uint8_t initial_key[key_len];
+	const uint8_t *new_key;
+	int ret;
+	union rte_thash_tuple tuple;
+	uint32_t orig_hash, adj_hash, adj;
+	unsigned int desired_value = 27 & HASH_MSK(reta_sz);
+	uint16_t port_value = 22;
+
+	memset(initial_key, 0, key_len);
+
+	ctx = rte_thash_init_ctx("test", key_len, reta_sz, initial_key,
+		RTE_THASH_MINIMAL_SEQ);
+	RTE_TEST_ASSERT(ctx != NULL, "can not create thash ctx\n");
+
+	ret = rte_thash_add_helper(ctx, "snat", sizeof(uint16_t) * 8,
+		offsetof(union rte_thash_tuple, v4.sport) * 8);
+	RTE_TEST_ASSERT(ret == 0, "can not add helper, ret %d\n", ret);
+
+	h = rte_thash_get_helper(ctx, "snat");
+	RTE_TEST_ASSERT(h != NULL, "can not find helper\n");
+
+	new_key = rte_thash_get_key(ctx);
+	tuple.v4.src_addr = RTE_IPV4(0, 0, 0, 0);
+	tuple.v4.dst_addr = RTE_IPV4(0, 0, 0, 0);
+	tuple.v4.sport = 0;
+	tuple.v4.sport = rte_cpu_to_be_16(port_value);
+	tuple.v4.dport = 0;
+	tuple.v4.sctp_tag = rte_be_to_cpu_32(tuple.v4.sctp_tag);
+
+	orig_hash = rte_softrss((uint32_t *)&tuple,
+		RTE_THASH_V4_L4_LEN, new_key);
+	adj = rte_thash_get_complement(h, orig_hash, desired_value);
+
+	tuple.v4.sctp_tag = rte_cpu_to_be_32(tuple.v4.sctp_tag);
+	tuple.v4.sport ^= rte_cpu_to_be_16(adj);
+	tuple.v4.sctp_tag = rte_be_to_cpu_32(tuple.v4.sctp_tag);
+
+	adj_hash = rte_softrss((uint32_t *)&tuple,
+		RTE_THASH_V4_L4_LEN, new_key);
+	RTE_TEST_ASSERT((adj_hash & HASH_MSK(reta_sz)) ==
+		desired_value, "bad desired value\n");
+
+	rte_thash_free_ctx(ctx);
+
+	return TEST_SUCCESS;
+}
+
+/*
+ * This test creates 7 subranges in the following order:
+ * range_one	= [56, 95),	len = 8, offset = 56
+ * range_two	= [64, 103),	len = 8, offset = 64
+ * range_three	= [120, 159),	len = 8, offset = 120
+ * range_four	= [48, 87),	len = 8, offset = 48
+ * range_five	= [57, 95),	len = 7, offset = 57
+ * range_six	= [40, 111),	len = 40, offset = 40
+ * range_seven	= [0, 39),	len = 8, offset = 0
+ */
+struct range {
+	const char *name;
+	int len;
+	int offset;
+	int byte_idx;
+};
+
+struct range rng_arr[] = {
+	{"one",   8,  56,  7},
+	{"two",   8,  64,  8},
+	{"three", 8,  120, 15},
+	{"four",  8,  48,  6},
+	{"six",   40, 40,  9},
+	{"five",  7,  57,  7},
+	{"seven", 8,  0,   0}
+};
+
+static int
+test_predictable_rss_multirange(void)
+{
+	struct rte_thash_ctx *ctx;
+	struct rte_thash_subtuple_helper *h[RTE_DIM(rng_arr)];
+	const uint8_t *new_key;
+	const int key_len = 40;
+	int reta_sz = 7;
+	unsigned int i, j, k;
+	int ret;
+	uint32_t desired_value = rte_rand() & HASH_MSK(reta_sz);
+	uint8_t tuples[RTE_DIM(rng_arr)][16] = { {0} };
+	uint32_t *ptr;
+	uint32_t hashes[RTE_DIM(rng_arr)];
+	uint32_t adj_hashes[RTE_DIM(rng_arr)];
+	uint32_t adj;
+
+	ctx = rte_thash_init_ctx("test", key_len, reta_sz, NULL, 0);
+	RTE_TEST_ASSERT(ctx != NULL, "can not create thash ctx\n");
+
+	for (i = 0; i < RTE_DIM(rng_arr); i++) {
+		ret = rte_thash_add_helper(ctx, rng_arr[i].name,
+			rng_arr[i].len, rng_arr[i].offset);
+		RTE_TEST_ASSERT(ret == 0, "can not add helper\n");
+
+		h[i] = rte_thash_get_helper(ctx, rng_arr[i].name);
+		RTE_TEST_ASSERT(h[i] != NULL, "can not find helper\n");
+	}
+	new_key = rte_thash_get_key(ctx);
+
+	/*
+	 * calculate hashes, complements, then adjust keys with
+	 * complements and recalsulate hashes
+	 */
+	for (i = 0; i < RTE_DIM(rng_arr); i++) {
+		for (k = 0; k < 100; k++) {
+			/* init with random keys */
+			ptr = (uint32_t *)&tuples[i][0];
+			for (j = 0; j < 4; j++)
+				ptr[j] = rte_rand();
+			/* convert keys from BE to CPU byte order */
+			for (j = 0; j < 4; j++)
+				ptr[j] = rte_be_to_cpu_32(ptr[j]);
+
+			hashes[i] = rte_softrss(ptr, 4, new_key);
+			adj = rte_thash_get_complement(h[i], hashes[i],
+				desired_value);
+			/* convert back to BE to adjust the value */
+			for (j = 0; j < 4; j++)
+				ptr[j] = rte_cpu_to_be_32(ptr[j]);
+
+			tuples[i][rng_arr[i].byte_idx] ^= adj;
+
+			for (j = 0; j < 4; j++)
+				ptr[j] = rte_be_to_cpu_32(ptr[j]);
+
+			adj_hashes[i] = rte_softrss(ptr, 4, new_key);
+			RTE_TEST_ASSERT((adj_hashes[i] & HASH_MSK(reta_sz)) ==
+				desired_value,
+				"bad desired value for %d tuple\n", i);
+		}
+	}
+
+	rte_thash_free_ctx(ctx);
+
+	return TEST_SUCCESS;
+}
+
+static int
+cmp_tuple_eq(void *userdata, uint8_t *tuple)
+{
+	return memcmp(userdata, tuple, TUPLE_SZ);
+}
+
+static int
+test_adjust_tuple(void)
+{
+	struct rte_thash_ctx *ctx;
+	struct rte_thash_subtuple_helper *h;
+	const int key_len = 40;
+	const uint8_t *new_key;
+	uint8_t tuple[TUPLE_SZ];
+	uint32_t tmp_tuple[TUPLE_SZ / sizeof(uint32_t)];
+	uint32_t tuple_copy[TUPLE_SZ / sizeof(uint32_t)];
+	uint32_t hash;
+	int reta_sz = CHAR_BIT;
+	int ret;
+	unsigned int i, desired_value = rte_rand() & HASH_MSK(reta_sz);
+
+	memset(tuple, 0xab, TUPLE_SZ);
+
+	ctx = rte_thash_init_ctx("test", key_len, reta_sz, NULL, 0);
+	RTE_TEST_ASSERT(ctx != NULL, "can not create thash ctx\n");
+
+	/*
+	 * set offset to be in the middle of a byte
+	 * set size of the subtuple to be 2 * rets_sz
+	 * to have the room for random bits
+	 */
+	ret = rte_thash_add_helper(ctx, "test", reta_sz * 2,
+		(5 * CHAR_BIT) + 4);
+	RTE_TEST_ASSERT(ret == 0, "can not add helper, ret %d\n", ret);
+
+	new_key = rte_thash_get_key(ctx);
+
+	h = rte_thash_get_helper(ctx, "test");
+	RTE_TEST_ASSERT(h != NULL, "can not find helper\n");
+
+	ret = rte_thash_adjust_tuple(ctx, h, tuple, TUPLE_SZ, desired_value,
+		1, NULL, NULL);
+	RTE_TEST_ASSERT(ret == 0, "can not adjust tuple, ret %d\n", ret);
+
+	for (i = 0; i < (TUPLE_SZ / 4); i++)
+		tmp_tuple[i] =
+			rte_be_to_cpu_32(*(uint32_t *)&tuple[i * 4]);
+
+	hash = rte_softrss(tmp_tuple, TUPLE_SZ / 4, new_key);
+	RTE_TEST_ASSERT((hash & HASH_MSK(reta_sz)) ==
+		desired_value, "bad desired value\n");
+
+
+	/* Pass previously calculated tuple to callback function */
+	memcpy(tuple_copy, tuple, TUPLE_SZ);
+
+	memset(tuple, 0xab, TUPLE_SZ);
+	ret = rte_thash_adjust_tuple(ctx, h, tuple, TUPLE_SZ, desired_value,
+		1, cmp_tuple_eq, tuple_copy);
+	RTE_TEST_ASSERT(ret == -EEXIST,
+		"adjust tuple didn't indicate collision\n");
+
+	/*
+	 * Make the function to generate random bits into subtuple
+	 * after first adjustment attempt.
+	 */
+	memset(tuple, 0xab, TUPLE_SZ);
+	ret = rte_thash_adjust_tuple(ctx, h, tuple, TUPLE_SZ, desired_value,
+		2, cmp_tuple_eq, tuple_copy);
+	RTE_TEST_ASSERT(ret == 0, "can not adjust tuple, ret %d\n", ret);
+
+	for (i = 0; i < (TUPLE_SZ / 4); i++)
+		tmp_tuple[i] =
+			rte_be_to_cpu_32(*(uint32_t *)&tuple[i * 4]);
+
+	hash = rte_softrss(tmp_tuple, TUPLE_SZ / 4, new_key);
+	RTE_TEST_ASSERT((hash & HASH_MSK(reta_sz)) ==
+		desired_value, "bad desired value\n");
+
+	rte_thash_free_ctx(ctx);
+
+	return TEST_SUCCESS;
+}
+
+static struct unit_test_suite thash_tests = {
+	.suite_name = "thash autotest",
+	.setup = NULL,
+	.teardown = NULL,
+	.unit_test_cases = {
+	TEST_CASE(test_toeplitz_hash_calc),
+	TEST_CASE(test_create_invalid),
+	TEST_CASE(test_multiple_create),
+	TEST_CASE(test_free_null),
+	TEST_CASE(test_add_invalid_helper),
+	TEST_CASE(test_find_existing),
+	TEST_CASE(test_get_helper),
+	TEST_CASE(test_period_overflow),
+	TEST_CASE(test_predictable_rss_min_seq),
+	TEST_CASE(test_predictable_rss_multirange),
+	TEST_CASE(test_adjust_tuple),
+	TEST_CASES_END()
+	}
+};
+
+static int
+test_thash(void)
+{
+	return unit_test_suite_runner(&thash_tests);
 }
 
 REGISTER_TEST_COMMAND(thash_autotest, test_thash);
-- 
2.7.4