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[Qemu-devel] [RFC Patch v2 02/10] virtio-net rsc: Initilize & Cleanup


From: wexu
Subject: [Qemu-devel] [RFC Patch v2 02/10] virtio-net rsc: Initilize & Cleanup
Date: Mon, 1 Feb 2016 02:13:21 +0800

From: Wei Xu <address@hidden>

The chain list is initialized when the device is getting realized,
and the entry of the chain will be inserted dynamically according
to protocol type of the network traffic.

All the buffered packets and chain will be destroyed when the
device is going to be unrealized.

Signed-off-by: Wei Xu <address@hidden>
---
 hw/net/virtio-net.c            | 22 ++++++++++++++++++++++
 include/hw/virtio/virtio-net.h |  1 +
 2 files changed, 23 insertions(+)

diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index a877614..4e9458e 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -1603,6 +1603,26 @@ static int virtio_net_load_device(VirtIODevice *vdev, 
QEMUFile *f,
     return 0;
 }
 
+
+static void virtio_net_rsc_cleanup(VirtIONet *n)
+{
+    NetRscChain *chain, *rn_chain;
+    NetRscSeg *seg, *rn_seg;
+
+    QTAILQ_FOREACH_SAFE(chain, &n->rsc_chains, next, rn_chain) {
+        QTAILQ_FOREACH_SAFE(seg, &chain->buffers, next, rn_seg) {
+            QTAILQ_REMOVE(&chain->buffers, seg, next);
+            g_free(seg->buf);
+            g_free(seg);
+
+            timer_del(chain->drain_timer);
+            timer_free(chain->drain_timer);
+            QTAILQ_REMOVE(&n->rsc_chains, chain, next);
+            g_free(chain);
+        }
+    }
+}
+
 static NetClientInfo net_virtio_info = {
     .type = NET_CLIENT_OPTIONS_KIND_NIC,
     .size = sizeof(NICState),
@@ -1732,6 +1752,7 @@ static void virtio_net_device_realize(DeviceState *dev, 
Error **errp)
     nc = qemu_get_queue(n->nic);
     nc->rxfilter_notify_enabled = 1;
 
+    QTAILQ_INIT(&n->rsc_chains);
     n->qdev = dev;
     register_savevm(dev, "virtio-net", -1, VIRTIO_NET_VM_VERSION,
                     virtio_net_save, virtio_net_load, n);
@@ -1766,6 +1787,7 @@ static void virtio_net_device_unrealize(DeviceState *dev, 
Error **errp)
     g_free(n->vqs);
     qemu_del_nic(n->nic);
     virtio_cleanup(vdev);
+    virtio_net_rsc_cleanup(n);
 }
 
 static void virtio_net_instance_init(Object *obj)
diff --git a/include/hw/virtio/virtio-net.h b/include/hw/virtio/virtio-net.h
index f3cc25f..6ce8b93 100644
--- a/include/hw/virtio/virtio-net.h
+++ b/include/hw/virtio/virtio-net.h
@@ -59,6 +59,7 @@ typedef struct VirtIONet {
     VirtIONetQueue *vqs;
     VirtQueue *ctrl_vq;
     NICState *nic;
+    QTAILQ_HEAD(, NetRscChain) rsc_chains;
     uint32_t tx_timeout;
     int32_t tx_burst;
     uint32_t has_vnet_hdr;
-- 
2.4.0




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