ip: add support for buffer offload metadata in ip midchain

The offload should be handled by gso node or by the NIC
if the latter has the relevant capabilities. But ip midchain
is missing the support for buffer offload metadata in case
of GSO packet.

This patch adds the relevant support to add the buffer metadata
if the packet is GSO/IPIP to be handled accordingly.

Type: improvement

Change-Id: I17f5d71bf4c5f43a85ca3f2fbebfa1426b42ef69
Signed-off-by: Arthur de Kerhor <arthurdekerhor@gmail.com>
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>

2 files changed, 0 insertions, 23 deletions

diff --git a/src/vnet/ip/ip4_forward.c b/src/vnet/ip/ip4_forward.c
index eb2b7ee04bc..e85c888f669 100644
--- a/src/vnet/ip/ip4_forward.c
+++ b/src/vnet/ip/ip4_forward.c
@@ -2223,9 +2223,6 @@ ip4_rewrite_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
 						adj0->ia_cfg_index);
 
 	  next[0] = next_index;
-	  if (is_midchain)
-	    vnet_calc_checksums_inline (vm, b[0], 1 /* is_ip4 */ ,
-					0 /* is_ip6 */ );
 	}
       else
 	{
@@ -2248,9 +2245,6 @@ ip4_rewrite_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
 						&next_index, b[1],
 						adj1->ia_cfg_index);
 	  next[1] = next_index;
-	  if (is_midchain)
-	    vnet_calc_checksums_inline (vm, b[1], 1 /* is_ip4 */ ,
-					0 /* is_ip6 */ );
 	}
       else
 	{
@@ -2400,9 +2394,6 @@ ip4_rewrite_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
 
 	  if (is_midchain)
 	    {
-	      vnet_calc_checksums_inline (vm, b[0], 1 /* is_ip4 */ ,
-					  0 /* is_ip6 */ );
-
 	      /* Guess we are only writing on ipv4 header. */
 	      vnet_rewrite_one_header (adj0[0], ip0, sizeof (ip4_header_t));
 	    }
@@ -2506,10 +2497,6 @@ ip4_rewrite_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
 
 	  if (is_midchain)
 	    {
-	      /* this acts on the packet that is about to be encapped */
-	      vnet_calc_checksums_inline (vm, b[0], 1 /* is_ip4 */ ,
-					  0 /* is_ip6 */ );
-
 	      /* Guess we are only writing on ipv4 header. */
 	      vnet_rewrite_one_header (adj0[0], ip0, sizeof (ip4_header_t));
 	    }
diff --git a/src/vnet/ip/ip6_forward.c b/src/vnet/ip/ip6_forward.c
index 1f7fc3f66fa..06c473b1495 100644
--- a/src/vnet/ip/ip6_forward.c
+++ b/src/vnet/ip/ip6_forward.c
@@ -1971,13 +1971,6 @@ ip6_rewrite_inline_with_gso (vlib_main_t * vm,
 
 	  if (is_midchain)
 	    {
-	      /* before we paint on the next header, update the L4
-	       * checksums if required, since there's no offload on a tunnel */
-	      vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
-					  1 /* is_ip6 */ );
-	      vnet_calc_checksums_inline (vm, p1, 0 /* is_ip4 */ ,
-					  1 /* is_ip6 */ );
-
 	      /* Guess we are only writing on ipv6 header. */
 	      vnet_rewrite_two_headers (adj0[0], adj1[0],
 					ip0, ip1, sizeof (ip6_header_t));
@@ -2071,9 +2064,6 @@ ip6_rewrite_inline_with_gso (vlib_main_t * vm,
 
 	  if (is_midchain)
 	    {
-	      vnet_calc_checksums_inline (vm, p0, 0 /* is_ip4 */ ,
-					  1 /* is_ip6 */ );
-
 	      /* Guess we are only writing on ip6 header. */
 	      vnet_rewrite_one_header (adj0[0], ip0, sizeof (ip6_header_t));
 	    }