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ipsec: use hash lookup with signatures in SAD lookup

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Change hash function from jhash to crc.
Precalculate hash signatures for a bulk of keys and then
use rte_hash_lookup_with_hash_bulk_data() to speed up sad lookup
Also use rte_hash_add_key_with_hash and _del_key_with_hash with
precalculated hash signature for a key in rte_ipsec_sad_add and
rte_ipsec_sad_del

Signed-off-by: Vladimir Medvedkin <vladimir.medvedkin@intel.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
This commit is contained in:
Vladimir Medvedkin 2020-04-20 19:27:05 +01:00 committed by Thomas Monjalon
parent 14b8ab5762
commit a5a4d86d1e
1 changed files with 74 additions and 32 deletions
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106
lib/librte_ipsec/ipsec_sad.c
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@ -2,10 +2,12 @@
* Copyright(c) 2019 Intel Corporation
*/
#include <string.h>
#include <rte_eal_memconfig.h>
#include <rte_errno.h>
#include <rte_hash.h>
#include <rte_jhash.h>
#include <rte_hash_crc.h>
#include <rte_malloc.h>
#include <rte_random.h>
#include <rte_rwlock.h>
@ -24,7 +26,7 @@
/* "SAD_<name>" */
#define SAD_FORMAT SAD_PREFIX "%s"
#define DEFAULT_HASH_FUNC rte_jhash
#define DEFAULT_HASH_FUNC rte_hash_crc
#define MIN_HASH_ENTRIES 8U /* From rte_cuckoo_hash.h */
struct hash_cnt {
@ -35,6 +37,8 @@ struct hash_cnt {
struct rte_ipsec_sad {
char name[RTE_IPSEC_SAD_NAMESIZE];
struct rte_hash *hash[RTE_IPSEC_SAD_KEY_TYPE_MASK];
uint32_t keysize[RTE_IPSEC_SAD_KEY_TYPE_MASK];
uint32_t init_val;
/* Array to track number of more specific rules
* (spi_dip or spi_dip_sip). Used only in add/delete
* as a helper struct.
@ -70,29 +74,36 @@ add_specific(struct rte_ipsec_sad *sad, const void *key,
/* Check if the key is present in the table.
* Need for further accaunting in cnt_arr
*/
ret = rte_hash_lookup(sad->hash[key_type], key);
ret = rte_hash_lookup_with_hash(sad->hash[key_type], key,
rte_hash_crc(key, sad->keysize[key_type], sad->init_val));
notexist = (ret == -ENOENT);
/* Add an SA to the corresponding table.*/
ret = rte_hash_add_key_data(sad->hash[key_type], key, sa);
ret = rte_hash_add_key_with_hash_data(sad->hash[key_type], key,
rte_hash_crc(key, sad->keysize[key_type], sad->init_val), sa);
if (ret != 0)
return ret;
/* Check if there is an entry in SPI only table with the same SPI */
ret = rte_hash_lookup_data(sad->hash[RTE_IPSEC_SAD_SPI_ONLY],
key, &tmp_val);
ret = rte_hash_lookup_with_hash_data(sad->hash[RTE_IPSEC_SAD_SPI_ONLY],
key, rte_hash_crc(key, sad->keysize[RTE_IPSEC_SAD_SPI_ONLY],
sad->init_val), &tmp_val);
if (ret < 0)
tmp_val = NULL;
tmp_val = SET_BIT(tmp_val, key_type);
/* Add an entry into SPI only table */
ret = rte_hash_add_key_data(sad->hash[RTE_IPSEC_SAD_SPI_ONLY],
key, tmp_val);
ret = rte_hash_add_key_with_hash_data(
sad->hash[RTE_IPSEC_SAD_SPI_ONLY], key,
rte_hash_crc(key, sad->keysize[RTE_IPSEC_SAD_SPI_ONLY],
sad->init_val), tmp_val);
if (ret != 0)
return ret;
/* Update a counter for a given SPI */
ret = rte_hash_lookup(sad->hash[RTE_IPSEC_SAD_SPI_ONLY], key);
ret = rte_hash_lookup_with_hash(sad->hash[RTE_IPSEC_SAD_SPI_ONLY], key,
rte_hash_crc(key, sad->keysize[RTE_IPSEC_SAD_SPI_ONLY],
sad->init_val));
if (key_type == RTE_IPSEC_SAD_SPI_DIP)
sad->cnt_arr[ret].cnt_dip += notexist;
else
@ -122,15 +133,17 @@ rte_ipsec_sad_add(struct rte_ipsec_sad *sad,
*/
switch (key_type) {
case(RTE_IPSEC_SAD_SPI_ONLY):
ret = rte_hash_lookup_data(sad->hash[key_type],
key, &tmp_val);
ret = rte_hash_lookup_with_hash_data(sad->hash[key_type],
key, rte_hash_crc(key, sad->keysize[key_type],
sad->init_val), &tmp_val);
if (ret >= 0)
tmp_val = SET_BIT(sa, GET_BIT(tmp_val,
RTE_IPSEC_SAD_KEY_TYPE_MASK));
else
tmp_val = sa;
ret = rte_hash_add_key_data(sad->hash[key_type],
key, tmp_val);
ret = rte_hash_add_key_with_hash_data(sad->hash[key_type],
key, rte_hash_crc(key, sad->keysize[key_type],
sad->init_val), tmp_val);
return ret;
case(RTE_IPSEC_SAD_SPI_DIP):
case(RTE_IPSEC_SAD_SPI_DIP_SIP):
@ -158,13 +171,15 @@ del_specific(struct rte_ipsec_sad *sad, const void *key, int key_type)
uint32_t *cnt;
/* Remove an SA from the corresponding table.*/
ret = rte_hash_del_key(sad->hash[key_type], key);
ret = rte_hash_del_key_with_hash(sad->hash[key_type], key,
rte_hash_crc(key, sad->keysize[key_type], sad->init_val));
if (ret < 0)
return ret;
/* Get an index of cnt_arr entry for a given SPI */
ret = rte_hash_lookup_data(sad->hash[RTE_IPSEC_SAD_SPI_ONLY],
key, &tmp_val);
ret = rte_hash_lookup_with_hash_data(sad->hash[RTE_IPSEC_SAD_SPI_ONLY],
key, rte_hash_crc(key, sad->keysize[RTE_IPSEC_SAD_SPI_ONLY],
sad->init_val), &tmp_val);
if (ret < 0)
return ret;
cnt = (key_type == RTE_IPSEC_SAD_SPI_DIP) ?
@ -182,10 +197,15 @@ del_specific(struct rte_ipsec_sad *sad, const void *key, int key_type)
* remove an entry from SPI_only table
*/
if (tmp_val == NULL)
ret = rte_hash_del_key(sad->hash[RTE_IPSEC_SAD_SPI_ONLY], key);
ret = rte_hash_del_key_with_hash(
sad->hash[RTE_IPSEC_SAD_SPI_ONLY], key,
rte_hash_crc(key, sad->keysize[RTE_IPSEC_SAD_SPI_ONLY],
sad->init_val));
else
ret = rte_hash_add_key_data(sad->hash[RTE_IPSEC_SAD_SPI_ONLY],
key, tmp_val);
ret = rte_hash_add_key_with_hash_data(
sad->hash[RTE_IPSEC_SAD_SPI_ONLY], key,
rte_hash_crc(key, sad->keysize[RTE_IPSEC_SAD_SPI_ONLY],
sad->init_val), tmp_val);
if (ret < 0)
return ret;
return 0;
@ -203,19 +223,23 @@ rte_ipsec_sad_del(struct rte_ipsec_sad *sad,
return -EINVAL;
switch (key_type) {
case(RTE_IPSEC_SAD_SPI_ONLY):
ret = rte_hash_lookup_data(sad->hash[key_type],
key, &tmp_val);
ret = rte_hash_lookup_with_hash_data(sad->hash[key_type],
key, rte_hash_crc(key, sad->keysize[key_type],
sad->init_val), &tmp_val);
if (ret < 0)
return ret;
if (GET_BIT(tmp_val, RTE_IPSEC_SAD_KEY_TYPE_MASK) == 0) {
ret = rte_hash_del_key(sad->hash[key_type],
key);
ret = rte_hash_del_key_with_hash(sad->hash[key_type],
key, rte_hash_crc(key, sad->keysize[key_type],
sad->init_val));
ret = ret < 0 ? ret : 0;
} else {
tmp_val = GET_BIT(tmp_val,
RTE_IPSEC_SAD_KEY_TYPE_MASK);
ret = rte_hash_add_key_data(sad->hash[key_type],
key, tmp_val);
ret = rte_hash_add_key_with_hash_data(
sad->hash[key_type], key,
rte_hash_crc(key, sad->keysize[key_type],
sad->init_val), tmp_val);
}
return ret;
case(RTE_IPSEC_SAD_SPI_DIP):
@ -272,6 +296,7 @@ rte_ipsec_sad_create(const char *name, const struct rte_ipsec_sad_conf *conf)
hash_params.hash_func = DEFAULT_HASH_FUNC;
hash_params.hash_func_init_val = rte_rand();
sad->init_val = hash_params.hash_func_init_val;
hash_params.socket_id = conf->socket_id;
hash_params.name = hash_name;
if (conf->flags & RTE_IPSEC_SAD_FLAG_RW_CONCURRENCY)
@ -280,6 +305,7 @@ rte_ipsec_sad_create(const char *name, const struct rte_ipsec_sad_conf *conf)
/** Init hash[RTE_IPSEC_SAD_SPI_ONLY] for SPI only */
snprintf(hash_name, sizeof(hash_name), "sad_1_%p", sad);
hash_params.key_len = sizeof(((struct rte_ipsec_sadv4_key *)0)->spi);
sad->keysize[RTE_IPSEC_SAD_SPI_ONLY] = hash_params.key_len;
hash_params.entries = sa_sum;
sad->hash[RTE_IPSEC_SAD_SPI_ONLY] = rte_hash_create(&hash_params);
if (sad->hash[RTE_IPSEC_SAD_SPI_ONLY] == NULL) {
@ -295,6 +321,7 @@ rte_ipsec_sad_create(const char *name, const struct rte_ipsec_sad_conf *conf)
else
hash_params.key_len +=
sizeof(((struct rte_ipsec_sadv4_key *)0)->dip);
sad->keysize[RTE_IPSEC_SAD_SPI_DIP] = hash_params.key_len;
hash_params.entries = RTE_MAX(MIN_HASH_ENTRIES,
conf->max_sa[RTE_IPSEC_SAD_SPI_DIP]);
sad->hash[RTE_IPSEC_SAD_SPI_DIP] = rte_hash_create(&hash_params);
@ -311,6 +338,7 @@ rte_ipsec_sad_create(const char *name, const struct rte_ipsec_sad_conf *conf)
else
hash_params.key_len +=
sizeof(((struct rte_ipsec_sadv4_key *)0)->sip);
sad->keysize[RTE_IPSEC_SAD_SPI_DIP_SIP] = hash_params.key_len;
hash_params.entries = RTE_MAX(MIN_HASH_ENTRIES,
conf->max_sa[RTE_IPSEC_SAD_SPI_DIP_SIP]);
sad->hash[RTE_IPSEC_SAD_SPI_DIP_SIP] = rte_hash_create(&hash_params);
@ -440,15 +468,21 @@ __ipsec_sad_lookup(const struct rte_ipsec_sad *sad,
uint32_t n_3 = 0;
uint32_t i;
int found = 0;
hash_sig_t hash_sig[RTE_HASH_LOOKUP_BULK_MAX];
hash_sig_t hash_sig_2[RTE_HASH_LOOKUP_BULK_MAX];
hash_sig_t hash_sig_3[RTE_HASH_LOOKUP_BULK_MAX];
for (i = 0; i < n; i++)
for (i = 0; i < n; i++) {
sa[i] = NULL;
hash_sig[i] = rte_hash_crc_4byte(keys[i]->v4.spi,
sad->init_val);
}
/*
* Lookup keys in SPI only hash table first.
*/
rte_hash_lookup_bulk_data(sad->hash[RTE_IPSEC_SAD_SPI_ONLY],
(const void **)keys, n, &mask_1, sa);
rte_hash_lookup_with_hash_bulk_data(sad->hash[RTE_IPSEC_SAD_SPI_ONLY],
(const void **)keys, hash_sig, n, &mask_1, sa);
for (map = mask_1; map; map &= (map - 1)) {
i = rte_bsf64(map);
/*
@ -457,10 +491,16 @@ __ipsec_sad_lookup(const struct rte_ipsec_sad *sad,
*/
if ((uintptr_t)sa[i] & RTE_IPSEC_SAD_SPI_DIP_SIP) {
idx_3[n_3] = i;
hash_sig_3[n_3] = rte_hash_crc(keys[i],
sad->keysize[RTE_IPSEC_SAD_SPI_DIP_SIP],
sad->init_val);
keys_3[n_3++] = keys[i];
}
if ((uintptr_t)sa[i] & RTE_IPSEC_SAD_SPI_DIP) {
idx_2[n_2] = i;
hash_sig_2[n_2] = rte_hash_crc(keys[i],
sad->keysize[RTE_IPSEC_SAD_SPI_DIP],
sad->init_val);
keys_2[n_2++] = keys[i];
}
/* clear 2 LSB's which indicate the presence
@ -471,8 +511,9 @@ __ipsec_sad_lookup(const struct rte_ipsec_sad *sad,
/* Lookup for more specific rules in SPI_DIP table */
if (n_2 != 0) {
rte_hash_lookup_bulk_data(sad->hash[RTE_IPSEC_SAD_SPI_DIP],
keys_2, n_2, &mask_2, vals_2);
rte_hash_lookup_with_hash_bulk_data(
sad->hash[RTE_IPSEC_SAD_SPI_DIP],
keys_2, hash_sig_2, n_2, &mask_2, vals_2);
for (map_spec = mask_2; map_spec; map_spec &= (map_spec - 1)) {
i = rte_bsf64(map_spec);
sa[idx_2[i]] = vals_2[i];
@ -480,8 +521,9 @@ __ipsec_sad_lookup(const struct rte_ipsec_sad *sad,
}
/* Lookup for more specific rules in SPI_DIP_SIP table */
if (n_3 != 0) {
rte_hash_lookup_bulk_data(sad->hash[RTE_IPSEC_SAD_SPI_DIP_SIP],
keys_3, n_3, &mask_3, vals_3);
rte_hash_lookup_with_hash_bulk_data(
sad->hash[RTE_IPSEC_SAD_SPI_DIP_SIP],
keys_3, hash_sig_3, n_3, &mask_3, vals_3);
for (map_spec = mask_3; map_spec; map_spec &= (map_spec - 1)) {
i = rte_bsf64(map_spec);
sa[idx_3[i]] = vals_3[i];