buffers: make buffer data size configurable from startup config

Example:

buffers {
	default data-size 1536
}

Change-Id: I5b4436850ca18025c9fdcfc7ed648c2c2732d660
Signed-off-by: Damjan Marion <damarion@cisco.com>

3 files changed, 6 insertions, 4 deletions

diff --git a/src/vnet/ip/ip_frag.c b/src/vnet/ip/ip_frag.c
index de297767a70..6ecaa3c4dce 100644
--- a/src/vnet/ip/ip_frag.c
+++ b/src/vnet/ip/ip_frag.c
@@ -106,7 +106,8 @@ ip4_frag_do_fragment (vlib_main_t * vm, u32 from_bi, u32 ** buffer,
 
   rem = clib_net_to_host_u16 (ip4->length) - sizeof (ip4_header_t);
   max =
-    (clib_min (mtu, VLIB_BUFFER_DATA_SIZE) - sizeof (ip4_header_t)) & ~0x7;
+    (clib_min (mtu, vlib_bufer_get_default_size (vm)) -
+     sizeof (ip4_header_t)) & ~0x7;
 
   if (rem >
       (vlib_buffer_length_in_chain (vm, from_b) - sizeof (ip4_header_t)))
diff --git a/src/vnet/ip/ping.c b/src/vnet/ip/ping.c
index 890285f2606..90314b541c4 100755
--- a/src/vnet/ip/ping.c
+++ b/src/vnet/ip/ping.c
@@ -388,7 +388,7 @@ init_icmp46_echo_request (vlib_main_t * vm, vlib_buffer_t * b0,
   int l34_len =
     l4_header_offset + sizeof (icmp46_header_t) +
     offsetof (icmp46_echo_request_t, data);
-  int max_data_len = VLIB_BUFFER_DATA_SIZE - l34_len;
+  int max_data_len = vlib_bufer_get_default_size (vm) - l34_len;
 
   int first_buf_data_len = data_len < max_data_len ? data_len : max_data_len;
 
@@ -403,7 +403,8 @@ init_icmp46_echo_request (vlib_main_t * vm, vlib_buffer_t * b0,
     {
       int this_buf_data_len =
 	remaining_data_len <
-	VLIB_BUFFER_DATA_SIZE ? remaining_data_len : VLIB_BUFFER_DATA_SIZE;
+	vlib_bufer_get_default_size (vm) ? remaining_data_len :
+	vlib_bufer_get_default_size (vm);
       int n_alloc = vlib_buffer_alloc (vm, &b0->next_buffer, 1);
       if (n_alloc < 1)
 	{
diff --git a/src/vnet/ip/punt.c b/src/vnet/ip/punt.c
index 65e62c07aba..8331a876dcb 100644
--- a/src/vnet/ip/punt.c
+++ b/src/vnet/ip/punt.c
@@ -497,7 +497,7 @@ format_punt_trace (u8 * s, va_list * va)
 static uword
 punt_socket_rx_fd (vlib_main_t * vm, vlib_node_runtime_t * node, u32 fd)
 {
-  const uword buffer_size = VLIB_BUFFER_DATA_SIZE;
+  const uword buffer_size = vlib_bufer_get_default_size (vm);
   u32 n_trace = vlib_get_trace_count (vm, node);
   u32 next = node->cached_next_index;
   u32 n_left_to_next, next_index;