features: take device-input buffer advance value directly

Change-Id: Ifac7d9134d03d79164ce6f06ae9413279bbaadb3
Signed-off-by: Damjan Marion <damarion@cisco.com>

6 files changed, 40 insertions, 34 deletions

diff --git a/src/vnet/devices/af_packet/node.c b/src/vnet/devices/af_packet/node.c
index 69fc11c9..ab7fd800 100644
--- a/src/vnet/devices/af_packet/node.c
+++ b/src/vnet/devices/af_packet/node.c
@@ -216,8 +216,7 @@ af_packet_device_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
 	    }
 
 	  /* redirect if feature path enabled */
-	  vnet_feature_start_device_input_x1 (apif->sw_if_index, &next0, b0,
-					      0);
+	  vnet_feature_start_device_input_x1 (apif->sw_if_index, &next0, b0);
 
 	  /* enque and take next packet */
 	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
diff --git a/src/vnet/devices/netmap/node.c b/src/vnet/devices/netmap/node.c
index 835209a3..68ea7832 100644
--- a/src/vnet/devices/netmap/node.c
+++ b/src/vnet/devices/netmap/node.c
@@ -218,7 +218,7 @@ netmap_device_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
 
 	      /* redirect if feature path enabled */
 	      vnet_feature_start_device_input_x1 (nif->sw_if_index, &next0,
-						  first_b0, 0);
+						  first_b0);
 
 	      /* enque and take next packet */
 	      vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
diff --git a/src/vnet/devices/virtio/vhost-user.c b/src/vnet/devices/virtio/vhost-user.c
index f490f0c1..c16e9822 100644
--- a/src/vnet/devices/virtio/vhost-user.c
+++ b/src/vnet/devices/virtio/vhost-user.c
@@ -1747,7 +1747,7 @@ vhost_user_if_input (vlib_main_t * vm,
 
 	    /* redirect if feature path enabled */
 	    vnet_feature_start_device_input_x1 (vui->sw_if_index, &next0,
-						b_head, 0);
+						b_head);
 
 	    u32 bi = to_next[-1];	//Cannot use to_next[-1] in the macro
 	    vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
diff --git a/src/vnet/feature/feature.h b/src/vnet/feature/feature.h
index b27aaf17..77b1499d 100644
--- a/src/vnet/feature/feature.h
+++ b/src/vnet/feature/feature.h
@@ -18,6 +18,7 @@
 
 #include <vnet/vnet.h>
 #include <vnet/api_errno.h>
+#include <vnet/devices/devices.h>
 
 /** feature registration object */
 typedef struct _vnet_feature_arc_registration
@@ -227,7 +228,7 @@ vnet_feature_next (u32 sw_if_index, u32 * next0, vlib_buffer_t * b0)
 
 static_always_inline void
 vnet_feature_start_device_input_x1 (u32 sw_if_index, u32 * next0,
-				    vlib_buffer_t * b0, u16 buffer_advanced0)
+				    vlib_buffer_t * b0)
 {
   vnet_feature_main_t *fm = &feature_main;
   vnet_feature_config_main_t *cm;
@@ -242,9 +243,12 @@ vnet_feature_start_device_input_x1 (u32 sw_if_index, u32 * next0,
        * Save next0 so that the last feature in the chain
        * can skip ethernet-input if indicated...
        */
+      u16 adv;
+
       vnet_buffer (b0)->device_input_feat.saved_next_index = *next0;
-      vnet_buffer (b0)->device_input_feat.buffer_advance = buffer_advanced0;
-      vlib_buffer_advance (b0, -buffer_advanced0);
+      adv = device_input_next_node_advance[*next0];
+      vnet_buffer (b0)->device_input_feat.buffer_advance = adv;
+      vlib_buffer_advance (b0, -adv);
 
       b0->feature_arc_index = feature_arc_index;
       b0->current_config_index =
@@ -258,10 +262,7 @@ static_always_inline void
 vnet_feature_start_device_input_x2 (u32 sw_if_index,
 				    u32 * next0,
 				    u32 * next1,
-				    vlib_buffer_t * b0,
-				    vlib_buffer_t * b1,
-				    u16 buffer_advanced0,
-				    u16 buffer_advanced1)
+				    vlib_buffer_t * b0, vlib_buffer_t * b1)
 {
   vnet_feature_main_t *fm = &feature_main;
   vnet_feature_config_main_t *cm;
@@ -276,12 +277,17 @@ vnet_feature_start_device_input_x2 (u32 sw_if_index,
        * Save next0 so that the last feature in the chain
        * can skip ethernet-input if indicated...
        */
+      u16 adv;
+
       vnet_buffer (b0)->device_input_feat.saved_next_index = *next0;
+      adv = device_input_next_node_advance[*next0];
+      vnet_buffer (b0)->device_input_feat.buffer_advance = adv;
+      vlib_buffer_advance (b0, -adv);
+
       vnet_buffer (b1)->device_input_feat.saved_next_index = *next1;
-      vnet_buffer (b0)->device_input_feat.buffer_advance = buffer_advanced0;
-      vnet_buffer (b1)->device_input_feat.buffer_advance = buffer_advanced1;
-      vlib_buffer_advance (b0, -buffer_advanced0);
-      vlib_buffer_advance (b1, -buffer_advanced1);
+      adv = device_input_next_node_advance[*next1];
+      vnet_buffer (b1)->device_input_feat.buffer_advance = adv;
+      vlib_buffer_advance (b1, -adv);
 
       b0->feature_arc_index = feature_arc_index;
       b1->feature_arc_index = feature_arc_index;
@@ -303,12 +309,7 @@ vnet_feature_start_device_input_x4 (u32 sw_if_index,
 				    u32 * next3,
 				    vlib_buffer_t * b0,
 				    vlib_buffer_t * b1,
-				    vlib_buffer_t * b2,
-				    vlib_buffer_t * b3,
-				    u16 buffer_advanced0,
-				    u16 buffer_advanced1,
-				    u16 buffer_advanced2,
-				    u16 buffer_advanced3)
+				    vlib_buffer_t * b2, vlib_buffer_t * b3)
 {
   vnet_feature_main_t *fm = &feature_main;
   vnet_feature_config_main_t *cm;
@@ -323,20 +324,27 @@ vnet_feature_start_device_input_x4 (u32 sw_if_index,
        * Save next0 so that the last feature in the chain
        * can skip ethernet-input if indicated...
        */
+      u16 adv;
+
       vnet_buffer (b0)->device_input_feat.saved_next_index = *next0;
+      adv = device_input_next_node_advance[*next0];
+      vnet_buffer (b0)->device_input_feat.buffer_advance = adv;
+      vlib_buffer_advance (b0, -adv);
+
       vnet_buffer (b1)->device_input_feat.saved_next_index = *next1;
-      vnet_buffer (b2)->device_input_feat.saved_next_index = *next2;
-      vnet_buffer (b3)->device_input_feat.saved_next_index = *next3;
+      adv = device_input_next_node_advance[*next1];
+      vnet_buffer (b1)->device_input_feat.buffer_advance = adv;
+      vlib_buffer_advance (b1, -adv);
 
-      vnet_buffer (b0)->device_input_feat.buffer_advance = buffer_advanced0;
-      vnet_buffer (b1)->device_input_feat.buffer_advance = buffer_advanced1;
-      vnet_buffer (b2)->device_input_feat.buffer_advance = buffer_advanced2;
-      vnet_buffer (b3)->device_input_feat.buffer_advance = buffer_advanced3;
+      vnet_buffer (b2)->device_input_feat.saved_next_index = *next2;
+      adv = device_input_next_node_advance[*next2];
+      vnet_buffer (b2)->device_input_feat.buffer_advance = adv;
+      vlib_buffer_advance (b2, -adv);
 
-      vlib_buffer_advance (b0, -buffer_advanced0);
-      vlib_buffer_advance (b1, -buffer_advanced1);
-      vlib_buffer_advance (b2, -buffer_advanced2);
-      vlib_buffer_advance (b3, -buffer_advanced3);
+      vnet_buffer (b3)->device_input_feat.saved_next_index = *next3;
+      adv = device_input_next_node_advance[*next3];
+      vnet_buffer (b3)->device_input_feat.buffer_advance = adv;
+      vlib_buffer_advance (b3, -adv);
 
       b0->feature_arc_index = feature_arc_index;
       b1->feature_arc_index = feature_arc_index;
diff --git a/src/vnet/unix/tapcli.c b/src/vnet/unix/tapcli.c
index 25c930c6..496f3885 100644
--- a/src/vnet/unix/tapcli.c
+++ b/src/vnet/unix/tapcli.c
@@ -355,8 +355,7 @@ static uword tapcli_rx_iface(vlib_main_t * vm,
     to_next++;
     n_left_to_next--;
 
-    vnet_feature_start_device_input_x1 (ti->sw_if_index, &next_index, 
-                                        b_first, 0);
+    vnet_feature_start_device_input_x1 (ti->sw_if_index, &next_index, b_first);
 
     vlib_validate_buffer_enqueue_x1 (vm, node, next,
                                      to_next, n_left_to_next,
diff --git a/src/vnet/unix/tuntap.c b/src/vnet/unix/tuntap.c
index 4a5dd676..2cfcc92f 100644
--- a/src/vnet/unix/tuntap.c
+++ b/src/vnet/unix/tuntap.c
@@ -351,7 +351,7 @@ tuntap_rx (vlib_main_t * vm,
           next_index = VNET_DEVICE_INPUT_NEXT_DROP;
       }
 
-    vnet_feature_start_device_input_x1 (tm->sw_if_index, &next_index, b, 0);
+    vnet_feature_start_device_input_x1 (tm->sw_if_index, &next_index, b);
 
     vlib_set_next_frame_buffer (vm, node, next_index, bi);