ip: add support for buffer offload metadata in ip midchain

[vpp.git] / src / vnet / adj / adj_dp.h

diff --git a/src/vnet/adj/adj_dp.h b/src/vnet/adj/adj_dp.h
index 27c0581..186044b 100644 (file)
--- a/src/vnet/adj/adj_dp.h
+++ b/src/vnet/adj/adj_dp.h
@@ -18,6 +18,9 @@
 
 #include <vnet/adj/adj.h>
 #include <vnet/tunnel/tunnel_dp.h>
+#include <vnet/ip/ip4_inlines.h>
+#include <vnet/ip/ip6_inlines.h>
+#include <vnet/mpls/mpls_lookup.h>
 
 static_always_inline void
 adj_midchain_ipip44_fixup (vlib_main_t * vm,
@@ -33,34 +36,67 @@ adj_midchain_ipip44_fixup (vlib_main_t * vm,
   ip4->length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b));
 
   if (PREDICT_TRUE(TUNNEL_ENCAP_DECAP_FLAG_NONE == flags))
-  {
-      ip_csum_t sum;
-      u16 old,new;
-
-      old = 0;
-      new = ip4->length;
-
-      sum = ip4->checksum;
-      sum = ip_csum_update (sum, old, new, ip4_header_t, length);
-      ip4->checksum = ip_csum_fold (sum);
-  }
+    {
+      if (PREDICT_FALSE (b->flags & VNET_BUFFER_F_GSO))
+       {
+         vnet_buffer2 (b)->outer_l3_hdr_offset = (u8 *) ip4 - b->data;
+         vnet_buffer_offload_flags_set (b, VNET_BUFFER_OFFLOAD_F_TNL_IPIP |
+                                     VNET_BUFFER_OFFLOAD_F_OUTER_IP_CKSUM);
+       }
+      else
+       {
+         ip_csum_t sum;
+         u16 old,new;
+         old = 0;
+         new = ip4->length;
+         sum = ip4->checksum;
+         sum = ip_csum_update (sum, old, new, ip4_header_t, length);
+         ip4->checksum = ip_csum_fold (sum);
+       }
+    }
   else
-  {
+    {
       tunnel_encap_fixup_4o4 (flags, ip4 + 1, ip4);
-      ip4->checksum = ip4_header_checksum (ip4);
-  }
+      if (PREDICT_FALSE (b->flags & VNET_BUFFER_F_GSO))
+       {
+         vnet_buffer2 (b)->outer_l3_hdr_offset = (u8 *) ip4 - b->data;
+         vnet_buffer_offload_flags_set (b, VNET_BUFFER_OFFLOAD_F_TNL_IPIP |
+                                     VNET_BUFFER_OFFLOAD_F_OUTER_IP_CKSUM);
+       }
+      else
+        ip4->checksum = ip4_header_checksum (ip4);
+    }
 }
 
 static_always_inline void
 adj_midchain_fixup (vlib_main_t *vm,
                     const ip_adjacency_t *adj,
-                    vlib_buffer_t * b)
+                    vlib_buffer_t * b,
+                    vnet_link_t lt)
 {
-    if (PREDICT_TRUE(adj->rewrite_header.flags & VNET_REWRITE_FIXUP_IP4_O_4))
+    if (PREDICT_TRUE(adj->rewrite_header.flags &
+                     VNET_REWRITE_FIXUP_IP4_O_4))
         adj_midchain_ipip44_fixup (vm, adj, b);
     else if (adj->sub_type.midchain.fixup_func)
         adj->sub_type.midchain.fixup_func
             (vm, adj, b, adj->sub_type.midchain.fixup_data);
+
+    if (PREDICT_FALSE(adj->rewrite_header.flags &
+                      VNET_REWRITE_FIXUP_FLOW_HASH))
+    {
+        if (VNET_LINK_IP4 == lt)
+            vnet_buffer (b)->ip.flow_hash =
+                ip4_compute_flow_hash (vlib_buffer_get_current (b) + adj->rewrite_header.data_bytes,
+                                       IP_FLOW_HASH_DEFAULT);
+        else if (VNET_LINK_IP6 == lt)
+            vnet_buffer (b)->ip.flow_hash =
+                ip6_compute_flow_hash (vlib_buffer_get_current (b) + adj->rewrite_header.data_bytes,
+                                       IP_FLOW_HASH_DEFAULT);
+        else if (VNET_LINK_MPLS == lt)
+            vnet_buffer (b)->ip.flow_hash =
+                mpls_compute_flow_hash (vlib_buffer_get_current (b) + adj->rewrite_header.data_bytes,
+                                       IP_FLOW_HASH_DEFAULT);
+    }
 }
 
 #endif