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From: Vladimir Medvedkin <vladimir.medvedkin@intel.com>
To: dev@dpdk.org
Cc: konstantin.ananyev@intel.com, bernard.iremonger@intel.com,
akhil.goyal@nxp.com
Date: Tue, 3 Sep 2019 17:55:30 +0100
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Subject: [dpdk-dev] [PATCH v1 3/5] ipsec: add SAD add/delete/lookup
implementation
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Replace rte_ipsec_sad_add(), rte_ipsec_sad_del() and
rte_ipsec_sad_lookup() stubs with actual implementation.
It uses three librte_hash tables each of which contains
an entries for a specific SA type (either it is addressed by SPI only
or SPI+DIP or SPI+DIP+SIP)
Signed-off-by: Vladimir Medvedkin <vladimir.medvedkin@intel.com>
---
lib/librte_ipsec/ipsec_sad.c | 245 ++++++++++++++++++++++++++++++++++++++++---
1 file changed, 233 insertions(+), 12 deletions(-)
diff --git a/lib/librte_ipsec/ipsec_sad.c b/lib/librte_ipsec/ipsec_sad.c
index 7797628..4bf2206 100644
--- a/lib/librte_ipsec/ipsec_sad.c
+++ b/lib/librte_ipsec/ipsec_sad.c
@@ -13,6 +13,13 @@
#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>" */
@@ -37,20 +44,158 @@ static struct rte_tailq_elem rte_ipsec_sad_tailq = {
};
EAL_REGISTER_TAILQ(rte_ipsec_sad_tailq)
+#define SET_BIT(ptr, bit) (void *)((uintptr_t)(ptr) | (uintptr_t)(bit))
+#define CLEAR_BIT(ptr, bit) (void *)((uintptr_t)(ptr) & ~(uintptr_t)(bit))
+#define GET_BIT(ptr, bit) (void *)((uintptr_t)(ptr) & (uintptr_t)(bit))
+
+/*
+ * @internal helper function
+ * Add a rule of type SPI_DIP or SPI_DIP_SIP.
+ * Inserts a rule into an appropriate hash table,
+ * updates the value for a given SPI in SPI_ONLY hash table
+ * reflecting presence of more specific rule type in two LSBs.
+ * Updates a counter that reflects the number of rules whith the same SPI.
+ */
+static inline int
+add_specific(struct rte_ipsec_sad *sad, void *key,
+ int key_type, void *sa)
+{
+ void *tmp_val;
+ int ret, notexist;
+
+ ret = rte_hash_lookup(sad->hash[key_type], key);
+ notexist = (ret == -ENOENT);
+ ret = rte_hash_add_key_data(sad->hash[key_type], key, sa);
+ if (ret != 0)
+ return ret;
+ ret = rte_hash_lookup_data(sad->hash[RTE_IPSEC_SAD_SPI_ONLY],
+ key, &tmp_val);
+ if (ret < 0)
+ tmp_val = NULL;
+ tmp_val = SET_BIT(tmp_val, key_type);
+ ret = rte_hash_add_key_data(sad->hash[RTE_IPSEC_SAD_SPI_ONLY],
+ key, tmp_val);
+ if (ret != 0)
+ return ret;
+ ret = rte_hash_lookup(sad->hash[RTE_IPSEC_SAD_SPI_ONLY], key);
+ if (key_type == RTE_IPSEC_SAD_SPI_DIP)
+ sad->cnt_arr[ret].cnt_2 += notexist;
+ else
+ sad->cnt_arr[ret].cnt_3 += notexist;
+
+ return 0;
+}
+
int
-rte_ipsec_sad_add(__rte_unused struct rte_ipsec_sad *sad,
- __rte_unused union rte_ipsec_sad_key *key,
- __rte_unused int key_type, __rte_unused void *sa)
+rte_ipsec_sad_add(struct rte_ipsec_sad *sad, union rte_ipsec_sad_key *key,
+ int key_type, void *sa)
+{
+ void *tmp_val;
+ int ret;
+
+ if ((sad == NULL) || (key == NULL) || (sa == NULL) ||
+ /* sa must be 4 byte aligned */
+ (GET_BIT(sa, RTE_IPSEC_SAD_KEY_TYPE_MASK) != 0))
+ return -EINVAL;
+
+ /*
+ * Rules are stored in three hash tables depending on key_type.
+ * All rules will also have an entry in SPI_ONLY table, with entry
+ * value's two LSB's also indicating presence of rule with this SPI
+ * in other tables.
+ */
+ switch (key_type) {
+ case(RTE_IPSEC_SAD_SPI_ONLY):
+ ret = rte_hash_lookup_data(sad->hash[key_type],
+ key, &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);
+ return ret;
+ case(RTE_IPSEC_SAD_SPI_DIP):
+ case(RTE_IPSEC_SAD_SPI_DIP_SIP):
+ return add_specific(sad, key, key_type, sa);
+ default:
+ return -EINVAL;
+ }
+}
+
+/*
+ * @internal helper function
+ * Delete a rule of type SPI_DIP or SPI_DIP_SIP.
+ * Deletes an entry from an appropriate hash table and decrements
+ * an entry counter for given SPI.
+ * If entry to remove is the last one with given SPI within the table,
+ * then it will also update related entry in SPI_ONLY table.
+ * Removes an entry from SPI_ONLY hash table if there no rule left
+ * for this SPI in any table.
+ */
+static inline int
+del_specific(struct rte_ipsec_sad *sad, void *key, int key_type)
{
- return -ENOTSUP;
+ void *tmp_val;
+ int ret;
+ uint32_t *cnt;
+
+ ret = rte_hash_del_key(sad->hash[key_type], key);
+ if (ret < 0)
+ return ret;
+ ret = rte_hash_lookup_data(sad->hash[RTE_IPSEC_SAD_SPI_ONLY],
+ key, &tmp_val);
+ if (ret < 0)
+ return ret;
+ cnt = (key_type == RTE_IPSEC_SAD_SPI_DIP) ? &sad->cnt_arr[ret].cnt_2 :
+ &sad->cnt_arr[ret].cnt_3;
+ if (--(*cnt) != 0)
+ return 0;
+
+ tmp_val = CLEAR_BIT(tmp_val, key_type);
+ if (tmp_val == NULL)
+ ret = rte_hash_del_key(sad->hash[RTE_IPSEC_SAD_SPI_ONLY], key);
+ else
+ ret = rte_hash_add_key_data(sad->hash[RTE_IPSEC_SAD_SPI_ONLY],
+ key, tmp_val);
+ if (ret < 0)
+ return ret;
+ return 0;
}
int
-rte_ipsec_sad_del(__rte_unused struct rte_ipsec_sad *sad,
- __rte_unused union rte_ipsec_sad_key *key,
- __rte_unused int key_type)
+rte_ipsec_sad_del(struct rte_ipsec_sad *sad, union rte_ipsec_sad_key *key,
+ int key_type)
{
- return -ENOTSUP;
+ void *tmp_val;
+ int ret;
+
+ if ((sad == NULL) || (key == NULL))
+ return -EINVAL;
+ switch (key_type) {
+ case(RTE_IPSEC_SAD_SPI_ONLY):
+ ret = rte_hash_lookup_data(sad->hash[key_type],
+ key, &tmp_val);
+ if (ret < 0)
+ return ret;
+ if (GET_BIT(tmp_val, RTE_IPSEC_SAD_KEY_TYPE_MASK) == 0) {
+ RTE_ASSERT((cnt_2 == 0) && (cnt_3 == 0));
+ ret = rte_hash_del_key(sad->hash[key_type],
+ key);
+ } 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);
+ }
+ return ret;
+ case(RTE_IPSEC_SAD_SPI_DIP):
+ case(RTE_IPSEC_SAD_SPI_DIP_SIP):
+ return del_specific(sad, key, key_type);
+ default:
+ return -EINVAL;
+ }
}
struct rte_ipsec_sad *
@@ -248,10 +393,86 @@ rte_ipsec_sad_free(struct rte_ipsec_sad *sad)
rte_free(te);
}
+static int
+__ipsec_sad_lookup(const struct rte_ipsec_sad *sad,
+ const union rte_ipsec_sad_key *keys[], uint32_t n, void *sa[])
+{
+ const void *keys_2[RTE_HASH_LOOKUP_BULK_MAX];
+ const void *keys_3[RTE_HASH_LOOKUP_BULK_MAX];
+ void *vals_2[RTE_HASH_LOOKUP_BULK_MAX] = {NULL};
+ void *vals_3[RTE_HASH_LOOKUP_BULK_MAX] = {NULL};
+ uint32_t idx_2[RTE_HASH_LOOKUP_BULK_MAX];
+ uint32_t idx_3[RTE_HASH_LOOKUP_BULK_MAX];
+ uint64_t mask_1, mask_2, mask_3;
+ uint64_t map, map_spec;
+ uint32_t n_2 = 0;
+ uint32_t n_3 = 0;
+ uint32_t i;
+ int n_pkts = 0;
+
+ for (i = 0; i < n; i++)
+ sa[i] = NULL;
+
+ /*
+ * 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);
+ for (map = mask_1; map; map &= (map - 1)) {
+ i = rte_bsf64(map);
+ /*
+ * if returned value indicates presence of a rule in other
+ * tables save a key for further lookup.
+ */
+ if ((uintptr_t)sa[i] & RTE_IPSEC_SAD_SPI_DIP_SIP) {
+ idx_3[n_3] = i;
+ keys_3[n_3++] = keys[i];
+ }
+ if ((uintptr_t)sa[i] & RTE_IPSEC_SAD_SPI_DIP) {
+ idx_2[n_2] = i;
+ keys_2[n_2++] = keys[i];
+ }
+ sa[i] = CLEAR_BIT(sa[i], RTE_IPSEC_SAD_KEY_TYPE_MASK);
+ }
+
+ if (n_2 != 0) {
+ rte_hash_lookup_bulk_data(sad->hash[RTE_IPSEC_SAD_SPI_DIP],
+ keys_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];
+ }
+ }
+ 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);
+ for (map_spec = mask_3; map_spec; map_spec &= (map_spec - 1)) {
+ i = rte_bsf64(map_spec);
+ sa[idx_3[i]] = vals_3[i];
+ }
+ }
+ for (i = 0; i < n; i++)
+ n_pkts += (sa[i] != NULL);
+
+ return n_pkts;
+}
+
int
-rte_ipsec_sad_lookup(__rte_unused const struct rte_ipsec_sad *sad,
- __rte_unused const union rte_ipsec_sad_key *keys[],
- __rte_unused uint32_t n, __rte_unused void *sa[])
+rte_ipsec_sad_lookup(const struct rte_ipsec_sad *sad,
+ const union rte_ipsec_sad_key *keys[], uint32_t n, void *sa[])
{
- return -ENOTSUP;
+ uint32_t num, i = 0;
+ int n_pkts = 0;
+
+ if (unlikely((sad == NULL) || (keys == NULL) || (sa == NULL)))
+ return -EINVAL;
+
+ do {
+ num = RTE_MIN(n - i, (uint32_t)RTE_HASH_LOOKUP_BULK_MAX);
+ n_pkts += __ipsec_sad_lookup(sad,
+ &keys[i], num, &sa[i]);
+ i += num;
+ } while (i != n);
+
+ return n_pkts;
}
--
2.7.4