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[Qemu-devel] [RFC v2 2/2] virtio-net: Example Patch for using BPF
From: |
Sameeh Jubran |
Subject: |
[Qemu-devel] [RFC v2 2/2] virtio-net: Example Patch for using BPF |
Date: |
Mon, 25 Jun 2018 14:07:06 +0300 |
From: Sameeh Jubran <address@hidden>
This commit is a sample only for using the libbpf in the code and
shouldn't be committed.
Signed-off-by: Sameeh Jubran <address@hidden>
---
hw/net/Makefile.objs | 4 ++++
hw/net/virtio-net.c | 4 ++++
2 files changed, 8 insertions(+)
diff --git a/hw/net/Makefile.objs b/hw/net/Makefile.objs
index fa461d4463..0fb271436d 100644
--- a/hw/net/Makefile.objs
+++ b/hw/net/Makefile.objs
@@ -37,6 +37,10 @@ obj-$(CONFIG_PSERIES) += spapr_llan.o
obj-$(CONFIG_XILINX_ETHLITE) += xilinx_ethlite.o
obj-$(CONFIG_VIRTIO_NET) += virtio-net.o
+ifeq ($(CONFIG_BPF),y)
+ virtio-net.o-cflags := $(CFLAGS_BPF)
+ virtio-net.o-libs := $(LIBS_BPF)
+endif
obj-y += vhost_net.o
obj-$(CONFIG_ETSEC) += fsl_etsec/etsec.o fsl_etsec/registers.o \
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 90502fca7c..b4840838c1 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -27,6 +27,7 @@
#include "hw/virtio/virtio-access.h"
#include "migration/misc.h"
#include "standard-headers/linux/ethtool.h"
+#include "standard-headers/linux/libbpf.h"
#define VIRTIO_NET_VM_VERSION 11
@@ -1329,6 +1330,9 @@ static int32_t virtio_net_flush_tx(VirtIONetQueue *q)
VirtQueueElement *elem;
int32_t num_packets = 0;
int queue_index = vq2q(virtio_get_queue_index(q->tx_vq));
+
+ struct bpf_object *obj = NULL;
+ bpf_object__load(obj);
if (!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK)) {
return num_packets;
}
--
2.13.6