From patchwork Wed Mar 30 01:22:49 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Wang X-Patchwork-Id: 8692151 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id BD06FC0554 for ; Wed, 30 Mar 2016 01:23:21 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D2E3320351 for ; Wed, 30 Mar 2016 01:23:17 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9E5C9202F8 for ; Wed, 30 Mar 2016 01:23:16 +0000 (UTC) Received: from localhost ([::1]:51310 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1al4qp-0007Oz-Je for patchwork-qemu-devel@patchwork.kernel.org; Tue, 29 Mar 2016 21:23:15 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59831) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1al4qd-0007Of-Ko for qemu-devel@nongnu.org; Tue, 29 Mar 2016 21:23:04 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1al4qb-0008NB-9r for qemu-devel@nongnu.org; Tue, 29 Mar 2016 21:23:03 -0400 Received: from mx1.redhat.com ([209.132.183.28]:57802) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1al4qa-0008Md-S8 for qemu-devel@nongnu.org; Tue, 29 Mar 2016 21:23:01 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (Postfix) with ESMTPS id 7EC897F093; Wed, 30 Mar 2016 01:23:00 +0000 (UTC) Received: from jason-ThinkPad-T430s.redhat.com (vpn1-7-94.pek2.redhat.com [10.72.7.94]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u2U1Mu1x025729; Tue, 29 Mar 2016 21:22:58 -0400 From: Jason Wang To: peter.maydell@linaro.org, qemu-devel@nongnu.org Date: Wed, 30 Mar 2016 09:22:49 +0800 Message-Id: <1459300975-5987-2-git-send-email-jasowang@redhat.com> In-Reply-To: <1459300975-5987-1-git-send-email-jasowang@redhat.com> References: <1459300975-5987-1-git-send-email-jasowang@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: Jason Wang , Zhang Chen Subject: [Qemu-devel] [PULL V2 1/7] net/filter-mirror:Add filter-mirror X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Zhang Chen Filter-mirror is a netfilter plugin. It gives qemu the ability to mirror packets to a chardev. usage: -netdev tap,id=hn0 -chardev socket,id=mirror0,host=ip_primary,port=X,server,nowait -filter-mirror,id=m0,netdev=hn0,queue=tx/rx/all,outdev=mirror0 Signed-off-by: Zhang Chen Signed-off-by: Wen Congyang Reviewed-by: Yang Hongyang Reviewed-by: zhanghailiang Signed-off-by: Jason Wang --- net/Makefile.objs | 1 + net/filter-mirror.c | 183 ++++++++++++++++++++++++++++++++++++++++++++++++++++ qemu-options.hx | 5 ++ vl.c | 3 +- 4 files changed, 191 insertions(+), 1 deletion(-) create mode 100644 net/filter-mirror.c diff --git a/net/Makefile.objs b/net/Makefile.objs index 5fa2f97..b7c22fd 100644 --- a/net/Makefile.objs +++ b/net/Makefile.objs @@ -15,3 +15,4 @@ common-obj-$(CONFIG_VDE) += vde.o common-obj-$(CONFIG_NETMAP) += netmap.o common-obj-y += filter.o common-obj-y += filter-buffer.o +common-obj-y += filter-mirror.o diff --git a/net/filter-mirror.c b/net/filter-mirror.c new file mode 100644 index 0000000..37bfe80 --- /dev/null +++ b/net/filter-mirror.c @@ -0,0 +1,183 @@ +/* + * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD. + * Copyright (c) 2016 FUJITSU LIMITED + * Copyright (c) 2016 Intel Corporation + * + * Author: Zhang Chen + * + * 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/osdep.h" +#include "net/filter.h" +#include "net/net.h" +#include "qemu-common.h" +#include "qapi/error.h" +#include "qapi/qmp/qerror.h" +#include "qapi-visit.h" +#include "qom/object.h" +#include "qemu/main-loop.h" +#include "qemu/error-report.h" +#include "trace.h" +#include "sysemu/char.h" +#include "qemu/iov.h" +#include "qemu/sockets.h" + +#define FILTER_MIRROR(obj) \ + OBJECT_CHECK(MirrorState, (obj), TYPE_FILTER_MIRROR) + +#define TYPE_FILTER_MIRROR "filter-mirror" + +typedef struct MirrorState { + NetFilterState parent_obj; + char *outdev; + CharDriverState *chr_out; +} MirrorState; + +static int filter_mirror_send(NetFilterState *nf, + const struct iovec *iov, + int iovcnt) +{ + MirrorState *s = FILTER_MIRROR(nf); + int ret = 0; + ssize_t size = 0; + uint32_t len = 0; + char *buf; + + size = iov_size(iov, iovcnt); + if (!size) { + return 0; + } + + len = htonl(size); + ret = qemu_chr_fe_write_all(s->chr_out, (uint8_t *)&len, sizeof(len)); + if (ret != sizeof(len)) { + goto err; + } + + buf = g_malloc(size); + iov_to_buf(iov, iovcnt, 0, buf, size); + ret = qemu_chr_fe_write_all(s->chr_out, (uint8_t *)buf, size); + g_free(buf); + if (ret != size) { + goto err; + } + + return 0; + +err: + return ret < 0 ? ret : -EIO; +} + +static ssize_t filter_mirror_receive_iov(NetFilterState *nf, + NetClientState *sender, + unsigned flags, + const struct iovec *iov, + int iovcnt, + NetPacketSent *sent_cb) +{ + int ret; + + ret = filter_mirror_send(nf, iov, iovcnt); + if (ret) { + error_report("filter_mirror_send failed(%s)", strerror(-ret)); + } + + /* + * we don't hope this error interrupt the normal + * path of net packet, so we always return zero. + */ + return 0; +} + +static void filter_mirror_cleanup(NetFilterState *nf) +{ + MirrorState *s = FILTER_MIRROR(nf); + + if (s->chr_out) { + qemu_chr_fe_release(s->chr_out); + } +} + +static void filter_mirror_setup(NetFilterState *nf, Error **errp) +{ + MirrorState *s = FILTER_MIRROR(nf); + + if (!s->outdev) { + error_setg(errp, "filter filter mirror needs 'outdev' " + "property set"); + return; + } + + s->chr_out = qemu_chr_find(s->outdev); + if (s->chr_out == NULL) { + error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, + "Device '%s' not found", s->outdev); + return; + } + + if (qemu_chr_fe_claim(s->chr_out) != 0) { + error_setg(errp, QERR_DEVICE_IN_USE, s->outdev); + return; + } +} + +static void filter_mirror_class_init(ObjectClass *oc, void *data) +{ + NetFilterClass *nfc = NETFILTER_CLASS(oc); + + nfc->setup = filter_mirror_setup; + nfc->cleanup = filter_mirror_cleanup; + nfc->receive_iov = filter_mirror_receive_iov; +} + +static char *filter_mirror_get_outdev(Object *obj, Error **errp) +{ + MirrorState *s = FILTER_MIRROR(obj); + + return g_strdup(s->outdev); +} + +static void +filter_mirror_set_outdev(Object *obj, const char *value, Error **errp) +{ + MirrorState *s = FILTER_MIRROR(obj); + + g_free(s->outdev); + s->outdev = g_strdup(value); + if (!s->outdev) { + error_setg(errp, "filter filter mirror needs 'outdev' " + "property set"); + return; + } +} + +static void filter_mirror_init(Object *obj) +{ + object_property_add_str(obj, "outdev", filter_mirror_get_outdev, + filter_mirror_set_outdev, NULL); +} + +static void filter_mirror_fini(Object *obj) +{ + MirrorState *s = FILTER_MIRROR(obj); + + g_free(s->outdev); +} + +static const TypeInfo filter_mirror_info = { + .name = TYPE_FILTER_MIRROR, + .parent = TYPE_NETFILTER, + .class_init = filter_mirror_class_init, + .instance_init = filter_mirror_init, + .instance_finalize = filter_mirror_fini, + .instance_size = sizeof(MirrorState), +}; + +static void register_types(void) +{ + type_register_static(&filter_mirror_info); +} + +type_init(register_types); diff --git a/qemu-options.hx b/qemu-options.hx index d70d070..65e0391 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -3841,6 +3841,11 @@ queue @var{all|rx|tx} is an option that can be applied to any netfilter. @option{tx}: the filter is attached to the transmit queue of the netdev, where it will receive packets sent by the netdev. +@item -object filter-mirror,id=@var{id},netdev=@var{netdevid},outdev=@var{chardevid}[,queue=@var{all|rx|tx}] + +filter-mirror on netdev @var{netdevid},mirror net packet to chardev +@var{chardevid} + @item -object filter-dump,id=@var{id},netdev=@var{dev},file=@var{filename}][,maxlen=@var{len}] Dump the network traffic on netdev @var{dev} to the file specified by diff --git a/vl.c b/vl.c index 6cb5e40..8cd1d0c 100644 --- a/vl.c +++ b/vl.c @@ -2841,7 +2841,8 @@ static bool object_create_initial(const char *type) * they depend on netdevs already existing */ if (g_str_equal(type, "filter-buffer") || - g_str_equal(type, "filter-dump")) { + g_str_equal(type, "filter-dump") || + g_str_equal(type, "filter-mirror")) { return false; }