X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fbuffer.h;h=7dfc6b99baf1aedf0829217f146b75448449e14e;hb=a07bd708002a9c3d3c584f0d692deed1a758b517;hp=795bbd9610bc798f556112384873a38358c77a45;hpb=0f360dc3aa40d0654198bd3f3850bd31a0d78f7e;p=vpp.git

diff --git a/src/vnet/buffer.h b/src/vnet/buffer.h
index 795bbd9610b..7dfc6b99baf 100644
--- a/src/vnet/buffer.h
+++ b/src/vnet/buffer.h
@@ -42,36 +42,39 @@
 
 #include <vlib/vlib.h>
 
-/* VLIB buffer flags for ip4/ip6 packets.  Set by input interfaces for ip4/ip6
-   tcp/udp packets with hardware computed checksums. */
-#define LOG2_IP_BUFFER_L4_CHECKSUM_COMPUTED LOG2_VLIB_BUFFER_FLAG_USER(1)
-#define LOG2_IP_BUFFER_L4_CHECKSUM_CORRECT  LOG2_VLIB_BUFFER_FLAG_USER(2)
-#define IP_BUFFER_L4_CHECKSUM_COMPUTED (1 << LOG2_IP_BUFFER_L4_CHECKSUM_COMPUTED)
-#define IP_BUFFER_L4_CHECKSUM_CORRECT  (1 << LOG2_IP_BUFFER_L4_CHECKSUM_CORRECT)
-
-/* VLAN header flags.
- * These bits are zeroed in vlib_buffer_init_for_free_list()
- * meaning wherever the buffer comes from they have a reasonable
- * value (eg, if ip4/ip6 generates the packet.)
- */
-#define LOG2_ETH_BUFFER_VLAN_2_DEEP LOG2_VLIB_BUFFER_FLAG_USER(3)
-#define LOG2_ETH_BUFFER_VLAN_1_DEEP LOG2_VLIB_BUFFER_FLAG_USER(4)
-#define ETH_BUFFER_VLAN_2_DEEP (1 << LOG2_ETH_BUFFER_VLAN_2_DEEP)
-#define ETH_BUFFER_VLAN_1_DEEP (1 << LOG2_ETH_BUFFER_VLAN_1_DEEP)
-#define ETH_BUFFER_VLAN_BITS (ETH_BUFFER_VLAN_1_DEEP | \
-                              ETH_BUFFER_VLAN_2_DEEP)
-
-#define LOG2_BUFFER_HANDOFF_NEXT_VALID LOG2_VLIB_BUFFER_FLAG_USER(6)
-#define BUFFER_HANDOFF_NEXT_VALID (1 << LOG2_BUFFER_HANDOFF_NEXT_VALID)
+#define foreach_vnet_buffer_field \
+  _( 1, L4_CHECKSUM_COMPUTED)				\
+  _( 2, L4_CHECKSUM_CORRECT)				\
+  _( 3, VLAN_2_DEEP)					\
+  _( 4, VLAN_1_DEEP)					\
+  _( 8, SPAN_CLONE)					\
+  _( 6, HANDOFF_NEXT_VALID)				\
+  _( 7, LOCALLY_ORIGINATED)				\
+  _( 8, IS_IP4)						\
+  _( 9, IS_IP6)						\
+  _(10, OFFLOAD_IP_CKSUM)				\
+  _(11, OFFLOAD_TCP_CKSUM)				\
+  _(12, OFFLOAD_UDP_CKSUM)
+
+#define VNET_BUFFER_FLAGS_VLAN_BITS \
+  (VNET_BUFFER_F_VLAN_1_DEEP | VNET_BUFFER_F_VLAN_2_DEEP)
+
+enum
+{
+#define _(bit, name) VNET_BUFFER_F_##name  = (1 << LOG2_VLIB_BUFFER_FLAG_USER(bit)),
+  foreach_vnet_buffer_field
+#undef _
+};
 
-#define LOG2_VNET_BUFFER_LOCALLY_ORIGINATED LOG2_VLIB_BUFFER_FLAG_USER(7)
-#define VNET_BUFFER_LOCALLY_ORIGINATED (1 << LOG2_VNET_BUFFER_LOCALLY_ORIGINATED)
+enum
+{
+#define _(bit, name) VNET_BUFFER_F_LOG2_##name  = LOG2_VLIB_BUFFER_FLAG_USER(bit),
+  foreach_vnet_buffer_field
+#undef _
+};
 
-#define LOG2_VNET_BUFFER_SPAN_CLONE LOG2_VLIB_BUFFER_FLAG_USER(8)
-#define VNET_BUFFER_SPAN_CLONE (1 << LOG2_VNET_BUFFER_SPAN_CLONE)
 
 #define foreach_buffer_opaque_union_subtype     \
-_(ethernet)                                     \
 _(ip)                                           \
 _(swt)                                          \
 _(l2)                                           \
@@ -100,16 +103,12 @@ _(tcp)
 typedef struct
 {
   u32 sw_if_index[VLIB_N_RX_TX];
+  i16 l2_hdr_offset;
+  i16 l3_hdr_offset;
+  i16 l4_hdr_offset;
 
   union
   {
-    /* Ethernet. */
-    struct
-    {
-      /* Saved value of current header by ethernet-input. */
-      i32 start_of_ethernet_header;
-    } ethernet;
-
     /* IP4/6 buffer opaque. */
     struct
     {
@@ -143,9 +142,6 @@ typedef struct
 	  u8 code;
 	  u32 data;
 	} icmp;
-
-	/* IP header offset from vlib_buffer.data - saved by ip*_local nodes */
-	i32 start_of_ip_header;
       };
 
     } ip;
@@ -170,7 +166,7 @@ typedef struct
     } swt;
 
     /* l2 bridging path, only valid there */
-    struct
+    struct opaque_l2
     {
       u32 feature_bitmap;
       u16 bd_index;		/* bridge-domain index */
@@ -195,8 +191,7 @@ typedef struct
     /* L2 classify */
     struct
     {
-      u64 pad;			/* paddind for l2 */
-      u16 pad1;
+      struct opaque_l2 pad;
       union
       {
 	u32 table_index;
@@ -289,6 +284,12 @@ typedef struct
       u8 flags;
     } tcp;
 
+    /* SNAT */
+    struct
+    {
+      u32 flags;
+    } snat;
+
     u32 unused[6];
   };
 } vnet_buffer_opaque_t;
@@ -297,14 +298,9 @@ typedef struct
  * The opaque field of the vlib_buffer_t is intepreted as a
  * vnet_buffer_opaque_t. Hence it should be big enough to accommodate one.
  */
-STATIC_ASSERT (sizeof (vnet_buffer_opaque_t) <= STRUCT_SIZE_OF (vlib_buffer_t,
-								opaque),
+STATIC_ASSERT (sizeof (vnet_buffer_opaque_t) <=
+	       STRUCT_SIZE_OF (vlib_buffer_t, opaque),
 	       "VNET buffer meta-data too large for vlib_buffer");
-STATIC_ASSERT (STRUCT_OFFSET_OF
-	       (vnet_buffer_opaque_t,
-		l2_classify.table_index) >=
-	       STRUCT_SIZE_OF (vnet_buffer_opaque_t, l2),
-	       "l2_classify padding smaller than l2");
 
 #define vnet_buffer(b) ((vnet_buffer_opaque_t *) (b)->opaque)