The af_xdp plugin does not support chained buffers; attempting to send
chain buffers will result truncated packets or even send other packet's
data. As a workaround, turn any buffer chain into a single buffer before
tx.
Type: fix
Change-Id: I05dec912455eb2bb6c8122a28cd646f88983aa9a
Signed-off-by: Shmuel Hazan <shmuel.h@siklu.com>
+#include <vppinfra/clib.h>
#include <vlib/vlib.h>
#include <vlib/unix/unix.h>
#include <vnet/ethernet/ethernet.h>
#include <vlib/vlib.h>
#include <vlib/unix/unix.h>
#include <vnet/ethernet/ethernet.h>
+ if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_NEXT_PRESENT ||
+ b[1]->flags & VLIB_BUFFER_NEXT_PRESENT ||
+ b[2]->flags & VLIB_BUFFER_NEXT_PRESENT ||
+ b[3]->flags & VLIB_BUFFER_NEXT_PRESENT))
+ {
+ break;
+ }
+
vlib_prefetch_buffer_header (b[4], LOAD);
offset =
(sizeof (vlib_buffer_t) +
vlib_prefetch_buffer_header (b[4], LOAD);
offset =
(sizeof (vlib_buffer_t) +
+ if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_NEXT_PRESENT))
+ {
+ if (vlib_buffer_chain_linearize (vm, b[0]) != 1)
+ {
+ af_xdp_log (VLIB_LOG_LEVEL_ERR, ad,
+ "vlib_buffer_chain_linearize failed");
+ vlib_buffer_free_one (vm, b[0]->buffer_pool_index);
+ continue;
+ }
+ }
+
offset =
(sizeof (vlib_buffer_t) +
b[0]->current_data) << XSK_UNALIGNED_BUF_OFFSET_SHIFT;
offset =
(sizeof (vlib_buffer_t) +
b[0]->current_data) << XSK_UNALIGNED_BUF_OFFSET_SHIFT;