examples/ipsec-secgw/ipsec.c

   1 /*-
   2  *   BSD LICENSE
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  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33 #include <sys/types.h>
  34 #include <netinet/in.h>
  35 #include <netinet/ip.h>
  36
  37 #include <rte_branch_prediction.h>
  38 #include <rte_log.h>
  39 #include <rte_crypto.h>
  40 #include <rte_cryptodev.h>
  41 #include <rte_mbuf.h>
  42 #include <rte_hash.h>
  43
  44 #include "ipsec.h"
  45 #include "esp.h"
  46
  47 static inline int
  48 create_session(struct ipsec_ctx *ipsec_ctx __rte_unused, struct ipsec_sa *sa)
  49 {
  50         unsigned long cdev_id_qp = 0;
  51         int32_t ret;
  52         struct cdev_key key = { 0 };
  53
  54         key.lcore_id = (uint8_t)rte_lcore_id();
  55
  56         key.cipher_algo = (uint8_t)sa->cipher_algo;
  57         key.auth_algo = (uint8_t)sa->auth_algo;
  58
  59         ret = rte_hash_lookup_data(ipsec_ctx->cdev_map, &key,
  60                         (void **)&cdev_id_qp);
  61         if (ret < 0) {
  62                 RTE_LOG(ERR, IPSEC, "No cryptodev: core %u, cipher_algo %u, "
  63                                 "auth_algo %u\n", key.lcore_id, key.cipher_algo,
  64                                 key.auth_algo);
  65                 return -1;
  66         }
  67
  68         RTE_LOG(DEBUG, IPSEC, "Create session for SA spi %u on cryptodev "
  69                         "%u qp %u\n", sa->spi,
  70                         ipsec_ctx->tbl[cdev_id_qp].id,
  71                         ipsec_ctx->tbl[cdev_id_qp].qp);
  72
  73         sa->crypto_session = rte_cryptodev_sym_session_create(
  74                         ipsec_ctx->tbl[cdev_id_qp].id, sa->xforms);
  75
  76         sa->cdev_id_qp = cdev_id_qp;
  77
  78         return 0;
  79 }
  80
  81 static inline void
  82 enqueue_cop(struct cdev_qp *cqp, struct rte_crypto_op *cop)
  83 {
  84         int32_t ret, i;
  85
  86         cqp->buf[cqp->len++] = cop;
  87
  88         if (cqp->len == MAX_PKT_BURST) {
  89                 ret = rte_cryptodev_enqueue_burst(cqp->id, cqp->qp,
  90                                 cqp->buf, cqp->len);
  91                 if (ret < cqp->len) {
  92                         RTE_LOG(DEBUG, IPSEC, "Cryptodev %u queue %u:"
  93                                         " enqueued %u crypto ops out of %u\n",
  94                                          cqp->id, cqp->qp,
  95                                          ret, cqp->len);
  96                         for (i = ret; i < cqp->len; i++)
  97                                 rte_pktmbuf_free(cqp->buf[i]->sym->m_src);
  98                 }
  99                 cqp->in_flight += ret;
 100                 cqp->len = 0;
 101         }
 102 }
 103
 104 static inline void
 105 ipsec_enqueue(ipsec_xform_fn xform_func, struct ipsec_ctx *ipsec_ctx,
 106                 struct rte_mbuf *pkts[], struct ipsec_sa *sas[],
 107                 uint16_t nb_pkts)
 108 {
 109         int32_t ret = 0, i;
 110         struct ipsec_mbuf_metadata *priv;
 111         struct ipsec_sa *sa;
 112
 113         for (i = 0; i < nb_pkts; i++) {
 114                 if (unlikely(sas[i] == NULL)) {
 115                         rte_pktmbuf_free(pkts[i]);
 116                         continue;
 117                 }
 118
 119                 rte_prefetch0(sas[i]);
 120                 rte_prefetch0(pkts[i]);
 121
 122                 priv = get_priv(pkts[i]);
 123                 sa = sas[i];
 124                 priv->sa = sa;
 125
 126                 priv->cop.type = RTE_CRYPTO_OP_TYPE_SYMMETRIC;
 127                 priv->cop.status = RTE_CRYPTO_OP_STATUS_NOT_PROCESSED;
 128
 129                 rte_prefetch0(&priv->sym_cop);
 130                 priv->cop.sym = &priv->sym_cop;
 131
 132                 if ((unlikely(sa->crypto_session == NULL)) &&
 133                                 create_session(ipsec_ctx, sa)) {
 134                         rte_pktmbuf_free(pkts[i]);
 135                         continue;
 136                 }
 137
 138                 rte_crypto_op_attach_sym_session(&priv->cop,
 139                                 sa->crypto_session);
 140
 141                 ret = xform_func(pkts[i], sa, &priv->cop);
 142                 if (unlikely(ret)) {
 143                         rte_pktmbuf_free(pkts[i]);
 144                         continue;
 145                 }
 146
 147                 RTE_ASSERT(sa->cdev_id_qp < ipsec_ctx->nb_qps);
 148                 enqueue_cop(&ipsec_ctx->tbl[sa->cdev_id_qp], &priv->cop);
 149         }
 150 }
 151
 152 static inline int
 153 ipsec_dequeue(ipsec_xform_fn xform_func, struct ipsec_ctx *ipsec_ctx,
 154                 struct rte_mbuf *pkts[], uint16_t max_pkts)
 155 {
 156         int32_t nb_pkts = 0, ret = 0, i, j, nb_cops;
 157         struct ipsec_mbuf_metadata *priv;
 158         struct rte_crypto_op *cops[max_pkts];
 159         struct ipsec_sa *sa;
 160         struct rte_mbuf *pkt;
 161
 162         for (i = 0; i < ipsec_ctx->nb_qps && nb_pkts < max_pkts; i++) {
 163                 struct cdev_qp *cqp;
 164
 165                 cqp = &ipsec_ctx->tbl[ipsec_ctx->last_qp++];
 166                 if (ipsec_ctx->last_qp == ipsec_ctx->nb_qps)
 167                         ipsec_ctx->last_qp %= ipsec_ctx->nb_qps;
 168
 169                 if (cqp->in_flight == 0)
 170                         continue;
 171
 172                 nb_cops = rte_cryptodev_dequeue_burst(cqp->id, cqp->qp,
 173                                 cops, max_pkts - nb_pkts);
 174
 175                 cqp->in_flight -= nb_cops;
 176
 177                 for (j = 0; j < nb_cops; j++) {
 178                         pkt = cops[j]->sym->m_src;
 179                         rte_prefetch0(pkt);
 180
 181                         priv = get_priv(pkt);
 182                         sa = priv->sa;
 183
 184                         RTE_ASSERT(sa != NULL);
 185
 186                         ret = xform_func(pkt, sa, cops[j]);
 187                         if (unlikely(ret))
 188                                 rte_pktmbuf_free(pkt);
 189                         else
 190                                 pkts[nb_pkts++] = pkt;
 191                 }
 192         }
 193
 194         /* return packets */
 195         return nb_pkts;
 196 }
 197
 198 uint16_t
 199 ipsec_inbound(struct ipsec_ctx *ctx, struct rte_mbuf *pkts[],
 200                 uint16_t nb_pkts, uint16_t len)
 201 {
 202         struct ipsec_sa *sas[nb_pkts];
 203
 204         inbound_sa_lookup(ctx->sa_ctx, pkts, sas, nb_pkts);
 205
 206         ipsec_enqueue(esp_inbound, ctx, pkts, sas, nb_pkts);
 207
 208         return ipsec_dequeue(esp_inbound_post, ctx, pkts, len);
 209 }
 210
 211 uint16_t
 212 ipsec_outbound(struct ipsec_ctx *ctx, struct rte_mbuf *pkts[],
 213                 uint32_t sa_idx[], uint16_t nb_pkts, uint16_t len)
 214 {
 215         struct ipsec_sa *sas[nb_pkts];
 216
 217         outbound_sa_lookup(ctx->sa_ctx, sa_idx, sas, nb_pkts);
 218
 219         ipsec_enqueue(esp_outbound, ctx, pkts, sas, nb_pkts);
 220
 221         return ipsec_dequeue(esp_outbound_post, ctx, pkts, len);
 222 }