net/bnxt: reject flow offload with invalid MAC

Reject offload flows that have broadcast or multicast
Ethernet addresses.

Signed-off-by: Kishore Padmanabha <kishore.padmanabha@broadcom.com>
Reviewed-by: Mike Baucom <michael.baucom@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>

diff --git a/drivers/net/bnxt/tf_ulp/ulp_rte_parser.c b/drivers/net/bnxt/tf_ulp/ulp_rte_parser.c
index fcb7c44..c0339e6 100644 (file)
--- a/drivers/net/bnxt/tf_ulp/ulp_rte_parser.c
+++ b/drivers/net/bnxt/tf_ulp/ulp_rte_parser.c
@@ -603,6 +603,19 @@ ulp_rte_l2_proto_type_update(struct ulp_rte_parser_params *param,
        }
 }
 
+/* Internal Function to identify broadcast or multicast packets */
+static int32_t
+ulp_rte_parser_is_bcmc_addr(const struct rte_ether_addr *eth_addr)
+{
+       if (rte_is_multicast_ether_addr(eth_addr) ||
+           rte_is_broadcast_ether_addr(eth_addr)) {
+               BNXT_TF_DBG(DEBUG,
+                           "No support for bcast or mcast addr offload\n");
+               return 1;
+       }
+       return 0;
+}
+
 /* Function to handle the parsing of RTE Flow item Ethernet Header. */
 int32_t
 ulp_rte_eth_hdr_handler(const struct rte_flow_item *item,
@@ -625,10 +638,18 @@ ulp_rte_eth_hdr_handler(const struct rte_flow_item *item,
                field = ulp_rte_parser_fld_copy(&params->hdr_field[idx],
                                                eth_spec->dst.addr_bytes,
                                                size);
+               /* Todo: work around to avoid multicast and broadcast addr */
+               if (ulp_rte_parser_is_bcmc_addr(&eth_spec->dst))
+                       return BNXT_TF_RC_PARSE_ERR;
+
                size = sizeof(eth_spec->src.addr_bytes);
                field = ulp_rte_parser_fld_copy(field,
                                                eth_spec->src.addr_bytes,
                                                size);
+               /* Todo: work around to avoid multicast and broadcast addr */
+               if (ulp_rte_parser_is_bcmc_addr(&eth_spec->src))
+                       return BNXT_TF_RC_PARSE_ERR;
+
                field = ulp_rte_parser_fld_copy(field,
                                                &eth_spec->type,
                                                sizeof(eth_spec->type));