aeebdca142
drive-mirror: Fix coroutine reentrance (bz #1266936) Fix udp socket 'localaddr' (bz #1268708)
51 lines
1.9 KiB
Diff
51 lines
1.9 KiB
Diff
From: Jason Wang <jasowang@redhat.com>
|
|
Date: Fri, 25 Sep 2015 13:21:29 +0800
|
|
Subject: [PATCH] virtio: introduce virtqueue_discard()
|
|
|
|
This patch introduces virtqueue_discard() to discard a descriptor and
|
|
unmap the sgs. This will be used by the patch that will discard
|
|
descriptor when packet is truncated.
|
|
|
|
Cc: Michael S. Tsirkin <mst@redhat.com>
|
|
Signed-off-by: Jason Wang <jasowang@redhat.com>
|
|
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
|
|
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
|
|
|
|
(cherry picked from commit 29b9f5efd78ae0f9cc02dd169b6e80d2c404bade)
|
|
---
|
|
hw/virtio/virtio.c | 7 +++++++
|
|
include/hw/virtio/virtio.h | 2 ++
|
|
2 files changed, 9 insertions(+)
|
|
|
|
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
|
|
index 7d88f26..e9f72a5 100644
|
|
--- a/hw/virtio/virtio.c
|
|
+++ b/hw/virtio/virtio.c
|
|
@@ -263,6 +263,13 @@ static void virtqueue_unmap_sg(VirtQueue *vq, const VirtQueueElement *elem,
|
|
0, elem->out_sg[i].iov_len);
|
|
}
|
|
|
|
+void virtqueue_discard(VirtQueue *vq, const VirtQueueElement *elem,
|
|
+ unsigned int len)
|
|
+{
|
|
+ vq->last_avail_idx--;
|
|
+ virtqueue_unmap_sg(vq, elem, len);
|
|
+}
|
|
+
|
|
void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem,
|
|
unsigned int len, unsigned int idx)
|
|
{
|
|
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
|
|
index d95f8b6..1899654 100644
|
|
--- a/include/hw/virtio/virtio.h
|
|
+++ b/include/hw/virtio/virtio.h
|
|
@@ -136,6 +136,8 @@ void virtio_del_queue(VirtIODevice *vdev, int n);
|
|
void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem,
|
|
unsigned int len);
|
|
void virtqueue_flush(VirtQueue *vq, unsigned int count);
|
|
+void virtqueue_discard(VirtQueue *vq, const VirtQueueElement *elem,
|
|
+ unsigned int len);
|
|
void virtqueue_fill(VirtQueue *vq, const VirtQueueElement *elem,
|
|
unsigned int len, unsigned int idx);
|
|
|