X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvlib%2Fbuffer.h;h=99f40e840a56b14acb81a2f03ce68d87946842c8;hb=bd0da97e5ac0f84e1ea8e6e7f9549dd4e1a6a4ab;hp=f9750ecf3e1cdba5dd4c7ab02736b073f95eb4a2;hpb=93468adfc4c5a449532fbfecd575f17d9cae7099;p=vpp.git

diff --git a/src/vlib/buffer.h b/src/vlib/buffer.h
index f9750ecf3e1..99f40e840a5 100644
--- a/src/vlib/buffer.h
+++ b/src/vlib/buffer.h
@@ -51,6 +51,14 @@
 #define VLIB_BUFFER_DATA_SIZE		(2048)
 #define VLIB_BUFFER_PRE_DATA_SIZE	__PRE_DATA_SIZE
 
+/* Minimum buffer chain segment size. Does not apply to last buffer in chain.
+   Dataplane code can safely asume that specified amount of data is not split
+   into 2 chained buffers */
+#define VLIB_BUFFER_MIN_CHAIN_SEG_SIZE	(128)
+
+/* Amount of head buffer data copied to each replica head buffer */
+#define VLIB_BUFFER_CLONE_HEAD_SIZE (256)
+
 typedef u8 vlib_buffer_free_list_index_t;
 
 /** \file
@@ -224,6 +232,9 @@ vlib_buffer_advance (vlib_buffer_t * b, word l)
   ASSERT (b->current_length >= l);
   b->current_data += l;
   b->current_length -= l;
+
+  ASSERT ((b->flags & VLIB_BUFFER_NEXT_PRESENT) == 0 ||
+	  b->current_length >= VLIB_BUFFER_MIN_CHAIN_SEG_SIZE);
 }
 
 /** \brief Check if there is enough space in buffer to advance