[RFC,v2,01/10] virtio-net rsc: Data structure, 'Segment', 'Chain' and 'Status'

Commit Message

Wei Xu Jan. 31, 2016, 6:13 p.m. UTC

From: Wei Xu <[e-mail]>

Segment is the coalesced packets in a connection.

Status is to indicate the status while do coalescing, such as if a
packet is bypassed or coalesced, etc.

Chain is used to save the segments of different protocols in a VirtIONet
instance.

A timer is used in a chain to help purging the buffer/coalesced packets.

Signed-off-by: Wei Xu <[e-mail]>
---
 include/hw/virtio/virtio.h | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

Patch

diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index 205fadf..1383220 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -127,6 +127,38 @@  typedef struct VirtioDeviceClass {
     int (*load)(VirtIODevice *vdev, QEMUFile *f, int version_id);
 } VirtioDeviceClass;
 
+/* Coalesced packets type & status */
+typedef enum {
+    RSC_COALESCE,           /* Data been coalesced */
+    RSC_FINAL,              /* Will terminate current connection */
+    RSC_NO_MATCH,           /* No matched in the buffer pool */
+    RSC_BYPASS,             /* Packet to be bypass, not tcp, tcp ctrl, etc */
+    RSC_WANT                /* Data want to be coalesced */
+} COALESCE_STATUS;
+
+/* Coalesced segmant */
+typedef struct NetRscSeg {
+    QTAILQ_ENTRY(NetRscSeg) next;
+    void *buf;
+    size_t size;
+    uint32_t dup_ack_count;
+    bool is_coalesced;      /* need recal ipv4 header checksum, mark here */
+    NetClientState *nc;
+} NetRscSeg;
+
+/* Receive callback for ipv4/6 */
+typedef size_t (VirtioNetReceive) (void *,
+                                   NetClientState *, const uint8_t *, size_t);
+
+/* Chain is divided by protocol(ipv4/v6) and NetClientInfo */
+typedef struct NetRscChain {
+    QTAILQ_ENTRY(NetRscChain) next;
+    uint16_t proto;
+    VirtioNetReceive *do_receive;
+    QEMUTimer *drain_timer;
+    QTAILQ_HEAD(, NetRscSeg) buffers;
+} NetRscChain;
+
 void virtio_instance_init_common(Object *proxy_obj, void *data,
                                  size_t vdev_size, const char *vdev_name);