kvm tools: Introduce ethernet frame buffer system for uip

- uip_buf_get_free()
  Get a free buffer from buffer pool, sleep if there is no free buffer.

- uip_buf_get_used()
  Get a used buffer from buffer pool, sleep if there is no used buffer.

- uip_buf_set_free()
  Set a buffer as free, so it can be reused by the buffer producer.

- uip_buf_set_used()
  Set a buffer as used, uip rx code will inject the ethernet frame in
  this buffer into guest.

- uip_buf_clone()
  Get a free buffer, and clone data into it.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index d368c221..91539de7 100644
--- a/Makefile
+++ b/Makefile
@@ -45,6 +45,7 @@ OBJS	+= disk/qcow.o
 OBJS	+= disk/raw.o
 OBJS	+= ioeventfd.o
 OBJS	+= irq.o
+OBJS	+= uip/buf.o
 OBJS	+= kvm-cmd.o
 OBJS	+= kvm-debug.o
 OBJS	+= kvm-help.o