gso: support TCP/IPv4 GSO

[dpdk.git] / lib / librte_gso / rte_gso.c

diff --git a/lib/librte_gso/rte_gso.c b/lib/librte_gso/rte_gso.c
index b773636..822693f 100644 (file)
--- a/lib/librte_gso/rte_gso.c
+++ b/lib/librte_gso/rte_gso.c
@@ -33,7 +33,12 @@
 
 #include <errno.h>
 
+#include <rte_log.h>
+#include <rte_ethdev.h>
+
 #include "rte_gso.h"
+#include "gso_common.h"
+#include "gso_tcp4.h"
 
 int
 rte_gso_segment(struct rte_mbuf *pkt,
@@ -41,12 +46,52 @@ rte_gso_segment(struct rte_mbuf *pkt,
                struct rte_mbuf **pkts_out,
                uint16_t nb_pkts_out)
 {
+       struct rte_mempool *direct_pool, *indirect_pool;
+       struct rte_mbuf *pkt_seg;
+       uint64_t ol_flags;
+       uint16_t gso_size;
+       uint8_t ipid_delta;
+       int ret = 1;
+
        if (pkt == NULL || pkts_out == NULL || gso_ctx == NULL ||
-                       nb_pkts_out < 1)
+                       nb_pkts_out < 1 ||
+                       gso_ctx->gso_size < RTE_GSO_SEG_SIZE_MIN ||
+                       gso_ctx->gso_types != DEV_TX_OFFLOAD_TCP_TSO)
                return -EINVAL;
 
-       pkt->ol_flags &= (~PKT_TX_TCP_SEG);
-       pkts_out[0] = pkt;
+       if (gso_ctx->gso_size >= pkt->pkt_len) {
+               pkt->ol_flags &= (~PKT_TX_TCP_SEG);
+               pkts_out[0] = pkt;
+               return 1;
+       }
+
+       direct_pool = gso_ctx->direct_pool;
+       indirect_pool = gso_ctx->indirect_pool;
+       gso_size = gso_ctx->gso_size;
+       ipid_delta = (gso_ctx->flag != RTE_GSO_FLAG_IPID_FIXED);
+       ol_flags = pkt->ol_flags;
+
+       if (IS_IPV4_TCP(pkt->ol_flags)) {
+               pkt->ol_flags &= (~PKT_TX_TCP_SEG);
+               ret = gso_tcp4_segment(pkt, gso_size, ipid_delta,
+                               direct_pool, indirect_pool,
+                               pkts_out, nb_pkts_out);
+       } else {
+               pkts_out[0] = pkt;
+               RTE_LOG(DEBUG, GSO, "Unsupported packet type\n");
+               return 1;
+       }
+
+       if (ret > 1) {
+               pkt_seg = pkt;
+               while (pkt_seg) {
+                       rte_mbuf_refcnt_update(pkt_seg, -1);
+                       pkt_seg = pkt_seg->next;
+               }
+       } else if (ret < 0) {
+               /* Revert the ol_flags in the event of failure. */
+               pkt->ol_flags = ol_flags;
+       }
 
-       return 1;
+       return ret;
 }