fib: Adjacency flag for midchain to perfom flow hash (on inner packet)

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

diff --git a/src/vnet/adj/rewrite.h b/src/vnet/adj/rewrite.h
index 05a722f..496bb14 100644 (file)
--- a/src/vnet/adj/rewrite.h
+++ b/src/vnet/adj/rewrite.h
@@ -55,10 +55,20 @@ typedef enum vnet_rewrite_flags_t_
    * This adjacency/interface has output features configured
    */
   VNET_REWRITE_HAS_FEATURES = (1 << 0),
+
+  /**
+   * this adj performs IP4 over IP4 fixup
+   */
+  VNET_REWRITE_FIXUP_IP4_O_4 = (1 << 1),
+
+  /**
+   * this adj performs the flow hash fixup
+   */
+  VNET_REWRITE_FIXUP_FLOW_HASH = (1 << 2),
 } __attribute__ ((packed)) vnet_rewrite_flags_t;
 
-/* *INDENT-OFF* */
-typedef CLIB_PACKED (struct {
+typedef struct vnet_rewrite_header_t_
+{
   /* Interface to mark re-written packets with. */
   u32 sw_if_index;
 
@@ -83,8 +93,7 @@ typedef CLIB_PACKED (struct {
 
   /* Rewrite string starting at end and going backwards. */
   u8 data[0];
-}) vnet_rewrite_header_t;
-/* *INDENT-ON* */
+} __clib_packed vnet_rewrite_header_t;
 
 /**
  * At 16 bytes of rewrite herader we have enought space left for a IPv6
@@ -105,12 +114,21 @@ STATIC_ASSERT (sizeof (vnet_rewrite_header_t) <= 16,
       vnet_rewrite_declare(64 - 2*sizeof(int)) rw;
     } my_adjacency_t;
 */
-#define vnet_declare_rewrite(total_bytes)                              \
-struct {                                                               \
-  vnet_rewrite_header_t rewrite_header;                                \
-                                                                       \
-  u8 rewrite_data[(total_bytes) - sizeof (vnet_rewrite_header_t)];     \
-}
+#define VNET_DECLARE_REWRITE                         \
+  struct                                             \
+  {                                                  \
+    vnet_rewrite_header_t rewrite_header;            \
+                                                     \
+    u8 rewrite_data[(VNET_REWRITE_TOTAL_BYTES) -     \
+                    sizeof (vnet_rewrite_header_t)]; \
+  }
+
+typedef struct __rewrite_unused_t__
+{
+  VNET_DECLARE_REWRITE;
+} __rewrite_unused_t;
+
+STATIC_ASSERT_SIZEOF (__rewrite_unused_t, 128);
 
 always_inline void
 vnet_rewrite_clear_data_internal (vnet_rewrite_header_t * rw, int max_size)
@@ -152,8 +170,8 @@ vnet_rewrite_get_data_internal (vnet_rewrite_header_t * rw, int max_size)
   vnet_rewrite_get_data_internal (&((rw).rewrite_header), sizeof ((rw).rewrite_data))
 
 always_inline void
-_vnet_rewrite_one_header (vnet_rewrite_header_t * h0,
-                         void *packet0, int max_size, int most_likely_size)
+_vnet_rewrite_one_header (const vnet_rewrite_header_t * h0,
+                         void *packet0, int most_likely_size)
 {
   /* 0xfefe => poisoned adjacency => crash */
   ASSERT (h0->data_bytes != 0xfefe);
@@ -170,10 +188,9 @@ _vnet_rewrite_one_header (vnet_rewrite_header_t * h0,
 }
 
 always_inline void
-_vnet_rewrite_two_headers (vnet_rewrite_header_t * h0,
-                          vnet_rewrite_header_t * h1,
-                          void *packet0,
-                          void *packet1, int max_size, int most_likely_size)
+_vnet_rewrite_two_headers (const vnet_rewrite_header_t * h0,
+                          const vnet_rewrite_header_t * h1,
+                          void *packet0, void *packet1, int most_likely_size)
 {
   /* 0xfefe => poisoned adjacency => crash */
   ASSERT (h0->data_bytes != 0xfefe);
@@ -198,13 +215,11 @@ _vnet_rewrite_two_headers (vnet_rewrite_header_t * h0,
 
 #define vnet_rewrite_one_header(rw0,p0,most_likely_size)       \
   _vnet_rewrite_one_header (&((rw0).rewrite_header), (p0),     \
-                           sizeof ((rw0).rewrite_data),        \
                            (most_likely_size))
 
 #define vnet_rewrite_two_headers(rw0,rw1,p0,p1,most_likely_size)       \
   _vnet_rewrite_two_headers (&((rw0).rewrite_header), &((rw1).rewrite_header), \
                             (p0), (p1),                                \
-                            sizeof ((rw0).rewrite_data),               \
                             (most_likely_size))
 
 always_inline void