From patchwork Fri Feb 26 08:12:04 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Chen X-Patchwork-Id: 588663 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 08C621402A9 for ; Fri, 26 Feb 2016 19:13:15 +1100 (AEDT) Received: from localhost ([::1]:47998 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aZDWT-0006YR-2i for incoming@patchwork.ozlabs.org; Fri, 26 Feb 2016 03:13:13 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43507) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aZDV5-0004UD-La for qemu-devel@nongnu.org; Fri, 26 Feb 2016 03:11:51 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aZDV0-0000LW-5h for qemu-devel@nongnu.org; Fri, 26 Feb 2016 03:11:47 -0500 Received: from [59.151.112.132] (port=41862 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aZDUw-0000Ke-5c for qemu-devel@nongnu.org; Fri, 26 Feb 2016 03:11:42 -0500 X-IronPort-AV: E=Sophos;i="5.20,346,1444665600"; d="scan'208";a="3952105" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 26 Feb 2016 16:11:34 +0800 Received: from G08CNEXCHPEKD02.g08.fujitsu.local (unknown [10.167.33.83]) by cn.fujitsu.com (Postfix) with ESMTP id 11FD942B4AE6; Fri, 26 Feb 2016 16:11:31 +0800 (CST) Received: from G08FNSTD140215.g08.fujitsu.local (10.167.226.56) by G08CNEXCHPEKD02.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.181.6; Fri, 26 Feb 2016 16:11:30 +0800 From: Zhang Chen To: qemu devel , Jason Wang Date: Fri, 26 Feb 2016 16:12:04 +0800 Message-ID: <1456474325-29104-2-git-send-email-zhangchen.fnst@cn.fujitsu.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1456474325-29104-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> References: <1456474325-29104-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.226.56] X-yoursite-MailScanner-ID: 11FD942B4AE6.AF17A X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: zhangchen.fnst@cn.fujitsu.com X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 59.151.112.132 Cc: Li Zhijian , Gui jianfeng , "eddie.dong" , zhanghailiang , "Dr. David Alan Gilbert" , Zhang Chen , Yang Hongyang Subject: [Qemu-devel] [PATCH V7 1/2] 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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org 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 --- net/Makefile.objs | 1 + net/filter-mirror.c | 181 ++++++++++++++++++++++++++++++++++++++++++++++++++++ qemu-options.hx | 5 ++ vl.c | 3 +- 4 files changed, 189 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..ee13d94 --- /dev/null +++ b/net/filter-mirror.c @@ -0,0 +1,181 @@ +/* + * 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 "net/filter.h" +#include "net/net.h" +#include "qemu-common.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 2f0465e..ca27863 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -3759,6 +3759,11 @@ 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 175ebcc..d68533a 100644 --- a/vl.c +++ b/vl.c @@ -2798,7 +2798,8 @@ 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; }