virtio: add tx trace
Type: improvement
@@ -69,10 +69,30 @@ format_virtio_device (u8 * s, va_list * args)
return s;
}
+typedef struct
+{
+ u32 buffer_index;
+ u32 sw_if_index;
+ vlib_buffer_t buffer;
+ generic_header_offset_t gho;
+} virtio_tx_trace_t;
+
static u8 *
-format_virtio_tx_trace (u8 * s, va_list * args)
+format_virtio_tx_trace (u8 * s, va_list * va)
{
- s = format (s, "Unimplemented...");
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
+ virtio_tx_trace_t *t = va_arg (*va, virtio_tx_trace_t *);
+ u32 indent = format_get_indent (s);
+
+ s = format (s, "%U ", format_generic_header_offset, &t->gho);
+ s = format (s, "%Ubuffer 0x%x: %U",
+ format_white_space, indent,
+ t->buffer_index, format_vnet_buffer, &t->buffer);
+
+ s = format (s, "\n%U%U", format_white_space, indent,
+ format_ethernet_header_with_length, t->buffer.pre_data,
+ sizeof (t->buffer.pre_data));
return s;
}
@@ -526,6 +546,44 @@ retry:
while (n_left && free_desc_count)
{
u16 n_added = 0;
+ virtio_tx_trace_t *t;
+
+ vlib_buffer_t *b0 = vlib_get_buffer (vm, buffers[0]);
+ if (b0->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ t = vlib_add_trace (vm, node, b0, sizeof (t[0]));
+ t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+ t->buffer_index = buffers[0];
+ if (type == VIRTIO_IF_TYPE_TUN)
+ {
+ int is_ip4 = 0, is_ip6 = 0;
+
+ switch (((u8 *) vlib_buffer_get_current (b0))[0] & 0xf0)
+ {
+ case 0x40:
+ is_ip4 = 1;
+ break;
+ case 0x60:
+ is_ip6 = 1;
+ break;
+ default:
+ break;
+ }
+ vnet_generic_header_offset_parser (b0, &t->gho, 0, is_ip4,
+ is_ip6);
+ }
+ else
+ vnet_generic_header_offset_parser (b0, &t->gho, 1,
+ b0->flags &
+ VNET_BUFFER_F_IS_IP4,
+ b0->flags &
+ VNET_BUFFER_F_IS_IP6);
+
+ clib_memcpy_fast (&t->buffer, b0,
+ sizeof (*b0) - sizeof (b0->pre_data));
+ clib_memcpy_fast (t->buffer.pre_data, vlib_buffer_get_current (b0),
+ sizeof (t->buffer.pre_data));
+ }
n_added =
add_buffer_to_slot (vm, vif, type, vring, buffers[0], free_desc_count,
avail, next, mask, do_gso, csum_offload,
