From fdccce4596218e49ca4d0f5d4b3f0c453bd99ba0 Mon Sep 17 00:00:00 2001
From: Yang Hongyang
Date: Wed, 7 Oct 2015 11:52:14 +0800
Subject: init/cleanup of netfilter object

Add a netfilter object based on QOM.

A netfilter is attached to a netdev, captures all network packets
that pass through the netdev. When we delete the netdev, we also
delete the netfilter object attached to it, because if the netdev is
removed, the filter which attached to it is useless.

Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 include/net/filter.h    | 61 +++++++++++++++++++++++++++++++++++++++++++++++++
 include/net/net.h       |  1 +
 include/qemu/typedefs.h |  1 +
 3 files changed, 63 insertions(+)
 create mode 100644 include/net/filter.h

(limited to 'include')

diff --git a/include/net/filter.h b/include/net/filter.h
new file mode 100644
index 0000000000..be27dee118
--- /dev/null
+++ b/include/net/filter.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2015 FUJITSU LIMITED
+ * Author: Yang Hongyang <yanghy@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_NET_FILTER_H
+#define QEMU_NET_FILTER_H
+
+#include "qom/object.h"
+#include "qemu-common.h"
+#include "qemu/typedefs.h"
+#include "net/queue.h"
+
+#define TYPE_NETFILTER "netfilter"
+#define NETFILTER(obj) \
+    OBJECT_CHECK(NetFilterState, (obj), TYPE_NETFILTER)
+#define NETFILTER_GET_CLASS(obj) \
+    OBJECT_GET_CLASS(NetFilterClass, (obj), TYPE_NETFILTER)
+#define NETFILTER_CLASS(klass) \
+    OBJECT_CLASS_CHECK(NetFilterClass, (klass), TYPE_NETFILTER)
+
+typedef void (FilterSetup) (NetFilterState *nf, Error **errp);
+typedef void (FilterCleanup) (NetFilterState *nf);
+/*
+ * Return:
+ *   0: finished handling the packet, we should continue
+ *   size: filter stolen this packet, we stop pass this packet further
+ */
+typedef ssize_t (FilterReceiveIOV)(NetFilterState *nc,
+                                   NetClientState *sender,
+                                   unsigned flags,
+                                   const struct iovec *iov,
+                                   int iovcnt,
+                                   NetPacketSent *sent_cb);
+
+typedef struct NetFilterClass {
+    ObjectClass parent_class;
+
+    /* optional */
+    FilterSetup *setup;
+    FilterCleanup *cleanup;
+    /* mandatory */
+    FilterReceiveIOV *receive_iov;
+} NetFilterClass;
+
+
+struct NetFilterState {
+    /* private */
+    Object parent;
+
+    /* protected */
+    char *netdev_id;
+    NetClientState *netdev;
+    NetFilterDirection direction;
+    QTAILQ_ENTRY(NetFilterState) next;
+};
+
+#endif /* QEMU_NET_FILTER_H */
diff --git a/include/net/net.h b/include/net/net.h
index 6a6cbef24a..36e5fabca5 100644
--- a/include/net/net.h
+++ b/include/net/net.h
@@ -92,6 +92,7 @@ struct NetClientState {
     NetClientDestructor *destructor;
     unsigned int queue_index;
     unsigned rxfilter_notify_enabled:1;
+    QTAILQ_HEAD(, NetFilterState) filters;
 };
 
 typedef struct NICState {
diff --git a/include/qemu/typedefs.h b/include/qemu/typedefs.h
index 3a835ffb9b..ee1ce1d44d 100644
--- a/include/qemu/typedefs.h
+++ b/include/qemu/typedefs.h
@@ -45,6 +45,7 @@ typedef struct Monitor Monitor;
 typedef struct MouseTransformInfo MouseTransformInfo;
 typedef struct MSIMessage MSIMessage;
 typedef struct NetClientState NetClientState;
+typedef struct NetFilterState NetFilterState;
 typedef struct NICInfo NICInfo;
 typedef struct PcGuestInfo PcGuestInfo;
 typedef struct PCIBridge PCIBridge;
-- 
cgit v1.2.3-55-g7522