* Copyright(c) 2019 Intel Corporation
*/
+#include <rte_eal_memconfig.h>
#include <rte_errno.h>
+#include <rte_hash.h>
+#include <rte_jhash.h>
+#include <rte_malloc.h>
+#include <rte_random.h>
+#include <rte_rwlock.h>
+#include <rte_tailq.h>
#include "rte_ipsec_sad.h"
+/*
+ * Rules are stored in three hash tables depending on key_type.
+ * Each rule will also be stored in SPI_ONLY table.
+ * for each data entry within this table last two bits are reserved to
+ * indicate presence of entries with the same SPI in DIP and DIP+SIP tables.
+ */
+
+#define IPSEC_SAD_NAMESIZE 64
+#define SAD_PREFIX "SAD_"
+/* "SAD_<name>" */
+#define SAD_FORMAT SAD_PREFIX "%s"
+
+#define DEFAULT_HASH_FUNC rte_jhash
+#define MIN_HASH_ENTRIES 8U /* From rte_cuckoo_hash.h */
+
+struct hash_cnt {
+ uint32_t cnt_dip;
+ uint32_t cnt_dip_sip;
+};
+
+struct rte_ipsec_sad {
+ char name[IPSEC_SAD_NAMESIZE];
+ struct rte_hash *hash[RTE_IPSEC_SAD_KEY_TYPE_MASK];
+ /* Array to track number of more specific rules
+ * (spi_dip or spi_dip_sip). Used only in add/delete
+ * as a helper struct.
+ */
+ __extension__ struct hash_cnt cnt_arr[];
+};
+
+TAILQ_HEAD(rte_ipsec_sad_list, rte_tailq_entry);
+static struct rte_tailq_elem rte_ipsec_sad_tailq = {
+ .name = "RTE_IPSEC_SAD",
+};
+EAL_REGISTER_TAILQ(rte_ipsec_sad_tailq)
+
int
rte_ipsec_sad_add(__rte_unused struct rte_ipsec_sad *sad,
__rte_unused const union rte_ipsec_sad_key *key,
}
struct rte_ipsec_sad *
-rte_ipsec_sad_create(__rte_unused const char *name,
- __rte_unused const struct rte_ipsec_sad_conf *conf)
+rte_ipsec_sad_create(const char *name, const struct rte_ipsec_sad_conf *conf)
{
- return NULL;
+ char hash_name[RTE_HASH_NAMESIZE];
+ char sad_name[IPSEC_SAD_NAMESIZE];
+ struct rte_tailq_entry *te;
+ struct rte_ipsec_sad_list *sad_list;
+ struct rte_ipsec_sad *sad, *tmp_sad = NULL;
+ struct rte_hash_parameters hash_params = {0};
+ int ret;
+ uint32_t sa_sum;
+
+ RTE_BUILD_BUG_ON(RTE_IPSEC_SAD_KEY_TYPE_MASK != 3);
+
+ if ((name == NULL) || (conf == NULL) ||
+ ((conf->max_sa[RTE_IPSEC_SAD_SPI_ONLY] == 0) &&
+ (conf->max_sa[RTE_IPSEC_SAD_SPI_DIP] == 0) &&
+ (conf->max_sa[RTE_IPSEC_SAD_SPI_DIP_SIP] == 0))) {
+ rte_errno = EINVAL;
+ return NULL;
+ }
+
+ ret = snprintf(sad_name, IPSEC_SAD_NAMESIZE, SAD_FORMAT, name);
+ if (ret < 0 || ret >= IPSEC_SAD_NAMESIZE) {
+ rte_errno = ENAMETOOLONG;
+ return NULL;
+ }
+
+ /** Init SAD*/
+ sa_sum = RTE_MAX(MIN_HASH_ENTRIES,
+ conf->max_sa[RTE_IPSEC_SAD_SPI_ONLY]) +
+ RTE_MAX(MIN_HASH_ENTRIES,
+ conf->max_sa[RTE_IPSEC_SAD_SPI_DIP]) +
+ RTE_MAX(MIN_HASH_ENTRIES,
+ conf->max_sa[RTE_IPSEC_SAD_SPI_DIP_SIP]);
+ sad = rte_zmalloc_socket(NULL, sizeof(*sad) +
+ (sizeof(struct hash_cnt) * sa_sum),
+ RTE_CACHE_LINE_SIZE, conf->socket_id);
+ if (sad == NULL) {
+ rte_errno = ENOMEM;
+ return NULL;
+ }
+ memcpy(sad->name, sad_name, sizeof(sad_name));
+
+ hash_params.hash_func = DEFAULT_HASH_FUNC;
+ hash_params.hash_func_init_val = rte_rand();
+ hash_params.socket_id = conf->socket_id;
+ hash_params.name = hash_name;
+ if (conf->flags & RTE_IPSEC_SAD_FLAG_RW_CONCURRENCY)
+ hash_params.extra_flag = RTE_HASH_EXTRA_FLAGS_RW_CONCURRENCY;
+
+ /** 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);
+ 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) {
+ rte_ipsec_sad_destroy(sad);
+ return NULL;
+ }
+
+ /** Init hash[RTE_IPSEC_SAD_SPI_DIP] for SPI + DIP */
+ snprintf(hash_name, sizeof(hash_name), "sad_2_%p", sad);
+ if (conf->flags & RTE_IPSEC_SAD_FLAG_IPV6)
+ hash_params.key_len +=
+ sizeof(((struct rte_ipsec_sadv6_key *)0)->dip);
+ else
+ hash_params.key_len +=
+ sizeof(((struct rte_ipsec_sadv4_key *)0)->dip);
+ 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);
+ if (sad->hash[RTE_IPSEC_SAD_SPI_DIP] == NULL) {
+ rte_ipsec_sad_destroy(sad);
+ return NULL;
+ }
+
+ /** Init hash[[RTE_IPSEC_SAD_SPI_DIP_SIP] for SPI + DIP + SIP */
+ snprintf(hash_name, sizeof(hash_name), "sad_3_%p", sad);
+ if (conf->flags & RTE_IPSEC_SAD_FLAG_IPV6)
+ hash_params.key_len +=
+ sizeof(((struct rte_ipsec_sadv6_key *)0)->sip);
+ else
+ hash_params.key_len +=
+ sizeof(((struct rte_ipsec_sadv4_key *)0)->sip);
+ 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);
+ if (sad->hash[RTE_IPSEC_SAD_SPI_DIP_SIP] == NULL) {
+ rte_ipsec_sad_destroy(sad);
+ return NULL;
+ }
+
+ sad_list = RTE_TAILQ_CAST(rte_ipsec_sad_tailq.head,
+ rte_ipsec_sad_list);
+ rte_mcfg_tailq_write_lock();
+ /* guarantee there's no existing */
+ TAILQ_FOREACH(te, sad_list, next) {
+ tmp_sad = (struct rte_ipsec_sad *)te->data;
+ if (strncmp(sad_name, tmp_sad->name, IPSEC_SAD_NAMESIZE) == 0)
+ break;
+ }
+ if (te != NULL) {
+ rte_mcfg_tailq_write_unlock();
+ rte_errno = EEXIST;
+ rte_ipsec_sad_destroy(sad);
+ return NULL;
+ }
+
+ /* allocate tailq entry */
+ te = rte_zmalloc("IPSEC_SAD_TAILQ_ENTRY", sizeof(*te), 0);
+ if (te == NULL) {
+ rte_mcfg_tailq_write_unlock();
+ rte_errno = ENOMEM;
+ rte_ipsec_sad_destroy(sad);
+ return NULL;
+ }
+
+ te->data = (void *)sad;
+ TAILQ_INSERT_TAIL(sad_list, te, next);
+ rte_mcfg_tailq_write_unlock();
+ return sad;
}
struct rte_ipsec_sad *
-rte_ipsec_sad_find_existing(__rte_unused const char *name)
+rte_ipsec_sad_find_existing(const char *name)
{
- return NULL;
+ char sad_name[IPSEC_SAD_NAMESIZE];
+ struct rte_ipsec_sad *sad = NULL;
+ struct rte_tailq_entry *te;
+ struct rte_ipsec_sad_list *sad_list;
+ int ret;
+
+ ret = snprintf(sad_name, IPSEC_SAD_NAMESIZE, SAD_FORMAT, name);
+ if (ret < 0 || ret >= IPSEC_SAD_NAMESIZE) {
+ rte_errno = ENAMETOOLONG;
+ return NULL;
+ }
+
+ sad_list = RTE_TAILQ_CAST(rte_ipsec_sad_tailq.head,
+ rte_ipsec_sad_list);
+
+ rte_mcfg_tailq_read_lock();
+ TAILQ_FOREACH(te, sad_list, next) {
+ sad = (struct rte_ipsec_sad *) te->data;
+ if (strncmp(sad_name, sad->name, IPSEC_SAD_NAMESIZE) == 0)
+ break;
+ }
+ rte_mcfg_tailq_read_unlock();
+
+ if (te == NULL) {
+ rte_errno = ENOENT;
+ return NULL;
+ }
+
+ return sad;
}
void
-rte_ipsec_sad_destroy(__rte_unused struct rte_ipsec_sad *sad)
+rte_ipsec_sad_destroy(struct rte_ipsec_sad *sad)
{
- return;
+ struct rte_tailq_entry *te;
+ struct rte_ipsec_sad_list *sad_list;
+
+ if (sad == NULL)
+ return;
+
+ sad_list = RTE_TAILQ_CAST(rte_ipsec_sad_tailq.head,
+ rte_ipsec_sad_list);
+ rte_mcfg_tailq_write_lock();
+ TAILQ_FOREACH(te, sad_list, next) {
+ if (te->data == (void *)sad)
+ break;
+ }
+ if (te != NULL)
+ TAILQ_REMOVE(sad_list, te, next);
+
+ rte_mcfg_tailq_write_unlock();
+
+ rte_hash_free(sad->hash[RTE_IPSEC_SAD_SPI_ONLY]);
+ rte_hash_free(sad->hash[RTE_IPSEC_SAD_SPI_DIP]);
+ rte_hash_free(sad->hash[RTE_IPSEC_SAD_SPI_DIP_SIP]);
+ rte_free(sad);
+ if (te != NULL)
+ rte_free(te);
}
int
git.droids-corp.org / dpdk.git / commitdiff