Merge remote-tracking branch 'remotes/jasowang/tags/net-pull-request' into staging

# gpg: Signature made Tue 27 Sep 2016 11:05:56 BST
# gpg:                using RSA key 0xEF04965B398D6211
# gpg: Good signature from "Jason Wang (Jason Wang on RedHat) <jasowang@redhat.com>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 215D 46F4 8246 689E C77F  3562 EF04 965B 398D 6211

* remotes/jasowang/tags/net-pull-request: (27 commits)
  imx_fec: fix error in qemu_send_packet argument
  mcf_fec: fix error in qemu_send_packet argument
  net: mcf: limit buffer descriptor count
  e1000e: Fix EIAC register implementation
  e1000e: Fix spurious RX TCP ACK interrupts
  e1000e: Fix OTHER interrupts processing for MSI-X
  e1000e: Fix PBACLR implementation
  e1000e: Fix CTRL_EXT.EIAME behavior
  e1000e: Flush receive queues on link up
  e1000e: Flush all receive queues on receive enable
  net: limit allocation in nc_sendv_compat
  tap: Allow specifying a bridge
  e1000: fix buliding complaint
  docs: Add documentation for COLO-proxy
  MAINTAINERS: add maintainer for COLO-proxy
  filter-rewriter: rewrite tcp packet to keep secondary connection
  filter-rewriter: track connection and parse packet
  filter-rewriter: introduce filter-rewriter initialization
  colo-compare: add TCP, UDP, ICMP packet comparison
  colo-compare: introduce packet comparison thread
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 88 insertions, 0 deletions

diff --git a/net/colo.h b/net/colo.h
new file mode 100644
index 0000000000..7c524f3a1c
--- /dev/null
+++ b/net/colo.h
@@ -0,0 +1,88 @@
+/*
+ * COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO)
+ * (a.k.a. Fault Tolerance or Continuous Replication)
+ *
+ * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
+ * Copyright (c) 2016 FUJITSU LIMITED
+ * Copyright (c) 2016 Intel Corporation
+ *
+ * Author: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * later.  See the COPYING file in the top-level directory.
+ */
+
+#ifndef QEMU_COLO_PROXY_H
+#define QEMU_COLO_PROXY_H
+
+#include "slirp/slirp.h"
+#include "qemu/jhash.h"
+#include "qemu/timer.h"
+
+#define HASHTABLE_MAX_SIZE 16384
+
+#ifndef IPPROTO_DCCP
+#define IPPROTO_DCCP 33
+#endif
+
+#ifndef IPPROTO_SCTP
+#define IPPROTO_SCTP 132
+#endif
+
+#ifndef IPPROTO_UDPLITE
+#define IPPROTO_UDPLITE 136
+#endif
+
+typedef struct Packet {
+    void *data;
+    union {
+        uint8_t *network_header;
+        struct ip *ip;
+    };
+    uint8_t *transport_header;
+    int size;
+    /* Time of packet creation, in wall clock ms */
+    int64_t creation_ms;
+} Packet;
+
+typedef struct ConnectionKey {
+    /* (src, dst) must be grouped, in the same way than in IP header */
+    struct in_addr src;
+    struct in_addr dst;
+    uint16_t src_port;
+    uint16_t dst_port;
+    uint8_t ip_proto;
+} QEMU_PACKED ConnectionKey;
+
+typedef struct Connection {
+    /* connection primary send queue: element type: Packet */
+    GQueue primary_list;
+    /* connection secondary send queue: element type: Packet */
+    GQueue secondary_list;
+    /* flag to enqueue unprocessed_connections */
+    bool processing;
+    uint8_t ip_proto;
+    /* offset = secondary_seq - primary_seq */
+    tcp_seq  offset;
+    /*
+     * we use this flag update offset func
+     * run once in independent tcp connection
+     */
+    int syn_flag;
+} Connection;
+
+uint32_t connection_key_hash(const void *opaque);
+int connection_key_equal(const void *opaque1, const void *opaque2);
+int parse_packet_early(Packet *pkt);
+void fill_connection_key(Packet *pkt, ConnectionKey *key);
+void reverse_connection_key(ConnectionKey *key);
+Connection *connection_new(ConnectionKey *key);
+void connection_destroy(void *opaque);
+Connection *connection_get(GHashTable *connection_track_table,
+                           ConnectionKey *key,
+                           GQueue *conn_list);
+void connection_hashtable_reset(GHashTable *connection_track_table);
+Packet *packet_new(const void *data, int size);
+void packet_destroy(void *opaque, void *user_data);
+
+#endif /* QEMU_COLO_PROXY_H */