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-rw-r--r--include/net/filter.h61
-rw-r--r--include/net/net.h1
-rw-r--r--include/qemu/typedefs.h1
-rw-r--r--net/Makefile.objs1
-rw-r--r--net/filter.c138
-rw-r--r--net/net.c7
-rw-r--r--qapi-schema.json20
7 files changed, 229 insertions, 0 deletions
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;
diff --git a/net/Makefile.objs b/net/Makefile.objs
index ec19cb31d9..914aec00a4 100644
--- a/net/Makefile.objs
+++ b/net/Makefile.objs
@@ -13,3 +13,4 @@ common-obj-$(CONFIG_HAIKU) += tap-haiku.o
common-obj-$(CONFIG_SLIRP) += slirp.o
common-obj-$(CONFIG_VDE) += vde.o
common-obj-$(CONFIG_NETMAP) += netmap.o
+common-obj-y += filter.o
diff --git a/net/filter.c b/net/filter.c
new file mode 100644
index 0000000000..d4062591d5
--- /dev/null
+++ b/net/filter.c
@@ -0,0 +1,138 @@
+/*
+ * 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.
+ */
+
+#include "qemu-common.h"
+#include "qapi/qmp/qerror.h"
+#include "qemu/error-report.h"
+
+#include "net/filter.h"
+#include "net/net.h"
+#include "net/vhost_net.h"
+#include "qom/object_interfaces.h"
+
+static char *netfilter_get_netdev_id(Object *obj, Error **errp)
+{
+ NetFilterState *nf = NETFILTER(obj);
+
+ return g_strdup(nf->netdev_id);
+}
+
+static void netfilter_set_netdev_id(Object *obj, const char *str, Error **errp)
+{
+ NetFilterState *nf = NETFILTER(obj);
+
+ nf->netdev_id = g_strdup(str);
+}
+
+static int netfilter_get_direction(Object *obj, Error **errp G_GNUC_UNUSED)
+{
+ NetFilterState *nf = NETFILTER(obj);
+ return nf->direction;
+}
+
+static void netfilter_set_direction(Object *obj, int direction, Error **errp)
+{
+ NetFilterState *nf = NETFILTER(obj);
+ nf->direction = direction;
+}
+
+static void netfilter_init(Object *obj)
+{
+ object_property_add_str(obj, "netdev",
+ netfilter_get_netdev_id, netfilter_set_netdev_id,
+ NULL);
+ object_property_add_enum(obj, "queue", "NetFilterDirection",
+ NetFilterDirection_lookup,
+ netfilter_get_direction, netfilter_set_direction,
+ NULL);
+}
+
+static void netfilter_complete(UserCreatable *uc, Error **errp)
+{
+ NetFilterState *nf = NETFILTER(uc);
+ NetClientState *ncs[MAX_QUEUE_NUM];
+ NetFilterClass *nfc = NETFILTER_GET_CLASS(uc);
+ int queues;
+ Error *local_err = NULL;
+
+ if (!nf->netdev_id) {
+ error_setg(errp, "Parameter 'netdev' is required");
+ return;
+ }
+
+ queues = qemu_find_net_clients_except(nf->netdev_id, ncs,
+ NET_CLIENT_OPTIONS_KIND_NIC,
+ MAX_QUEUE_NUM);
+ if (queues < 1) {
+ error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "netdev",
+ "a network backend id");
+ return;
+ } else if (queues > 1) {
+ error_setg(errp, "multiqueue is not supported");
+ return;
+ }
+
+ if (get_vhost_net(ncs[0])) {
+ error_setg(errp, "Vhost is not supported");
+ return;
+ }
+
+ nf->netdev = ncs[0];
+
+ if (nfc->setup) {
+ nfc->setup(nf, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+ }
+ QTAILQ_INSERT_TAIL(&nf->netdev->filters, nf, next);
+}
+
+static void netfilter_finalize(Object *obj)
+{
+ NetFilterState *nf = NETFILTER(obj);
+ NetFilterClass *nfc = NETFILTER_GET_CLASS(obj);
+
+ if (nfc->cleanup) {
+ nfc->cleanup(nf);
+ }
+
+ if (nf->netdev && !QTAILQ_EMPTY(&nf->netdev->filters)) {
+ QTAILQ_REMOVE(&nf->netdev->filters, nf, next);
+ }
+}
+
+static void netfilter_class_init(ObjectClass *oc, void *data)
+{
+ UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
+
+ ucc->complete = netfilter_complete;
+}
+
+static const TypeInfo netfilter_info = {
+ .name = TYPE_NETFILTER,
+ .parent = TYPE_OBJECT,
+ .abstract = true,
+ .class_size = sizeof(NetFilterClass),
+ .class_init = netfilter_class_init,
+ .instance_size = sizeof(NetFilterState),
+ .instance_init = netfilter_init,
+ .instance_finalize = netfilter_finalize,
+ .interfaces = (InterfaceInfo[]) {
+ { TYPE_USER_CREATABLE },
+ { }
+ }
+};
+
+static void register_types(void)
+{
+ type_register_static(&netfilter_info);
+}
+
+type_init(register_types);
diff --git a/net/net.c b/net/net.c
index 28a5597b8d..033f4f3387 100644
--- a/net/net.c
+++ b/net/net.c
@@ -44,6 +44,7 @@
#include "qapi/opts-visitor.h"
#include "qapi/dealloc-visitor.h"
#include "sysemu/sysemu.h"
+#include "net/filter.h"
/* Net bridge is currently not supported for W32. */
#if !defined(_WIN32)
@@ -287,6 +288,7 @@ static void qemu_net_client_setup(NetClientState *nc,
nc->incoming_queue = qemu_new_net_queue(nc);
nc->destructor = destructor;
+ QTAILQ_INIT(&nc->filters);
}
NetClientState *qemu_new_net_client(NetClientInfo *info,
@@ -384,6 +386,7 @@ void qemu_del_net_client(NetClientState *nc)
{
NetClientState *ncs[MAX_QUEUE_NUM];
int queues, i;
+ NetFilterState *nf, *next;
assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC);
@@ -395,6 +398,10 @@ void qemu_del_net_client(NetClientState *nc)
MAX_QUEUE_NUM);
assert(queues != 0);
+ QTAILQ_FOREACH_SAFE(nf, &nc->filters, next, next) {
+ object_unparent(OBJECT(nf));
+ }
+
/* If there is a peer NIC, delete and cleanup client, but do not free. */
if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
NICState *nic = qemu_get_nic(nc->peer);
diff --git a/qapi-schema.json b/qapi-schema.json
index 8b0520c2d0..a386605b6a 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -2588,6 +2588,26 @@
'opts': 'NetClientOptions' } }
##
+# @NetFilterDirection
+#
+# Indicates whether a netfilter is attached to a netdev's transmit queue or
+# receive queue or both.
+#
+# @all: the filter is attached both to the receive and the transmit
+# queue of the netdev (default).
+#
+# @rx: the filter is attached to the receive queue of the netdev,
+# where it will receive packets sent to the netdev.
+#
+# @tx: the filter is attached to the transmit queue of the netdev,
+# where it will receive packets sent by the netdev.
+#
+# Since 2.5
+##
+{ 'enum': 'NetFilterDirection',
+ 'data': [ 'all', 'rx', 'tx' ] }
+
+##
# @InetSocketAddress
#
# Captures a socket address or address range in the Internet namespace.
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-22 06:42:24 +0000