From patchwork Fri Feb 5 06:50:23 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Chen X-Patchwork-Id: 579390 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 EBCAE140BAD for ; Fri, 5 Feb 2016 17:50:59 +1100 (AEDT) Received: from localhost ([::1]:46342 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aRaEL-0006Vq-RU for incoming@patchwork.ozlabs.org; Fri, 05 Feb 2016 01:50:57 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42688) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aRaE0-0006DT-VN for qemu-devel@nongnu.org; Fri, 05 Feb 2016 01:50:38 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aRaDx-0006XG-Gx for qemu-devel@nongnu.org; Fri, 05 Feb 2016 01:50:36 -0500 Received: from [59.151.112.132] (port=55217 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aRaDw-0006Wy-9W for qemu-devel@nongnu.org; Fri, 05 Feb 2016 01:50:33 -0500 X-IronPort-AV: E=Sophos;i="5.20,346,1444665600"; d="scan'208";a="3346287" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 05 Feb 2016 14:50:13 +0800 Received: from G08CNEXCHPEKD02.g08.fujitsu.local (unknown [10.167.33.83]) by cn.fujitsu.com (Postfix) with ESMTP id 8C27141B7216; Fri, 5 Feb 2016 14:49:12 +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, 5 Feb 2016 14:50:10 +0800 From: Zhang Chen To: qemu devel , Jason Wang Date: Fri, 5 Feb 2016 14:50:23 +0800 Message-ID: <1454655023-29701-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> X-Mailer: git-send-email 1.9.1 MIME-Version: 1.0 X-Originating-IP: [10.167.226.56] X-yoursite-MailScanner-ID: 8C27141B7216.ADC99 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] net/filter-redirector:Add filter-redirector 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 From: ZhangChen Filter-redirector is a netfilter plugin. It gives qemu the ability to redirect net packet. redirector can redirect filter's net packet to outdev. and redirect indev's packet to filter. filter + | | redirector | +-------------------------+ | | | | | | | | | indev +----------------+ +----------------> outdev | | | | | | | | | +-------------------------+ | | v filter usage: -netdev tap,id=hn0 -chardev socket,id=s0,host=ip_primary,port=X,server,nowait -chardev socket,id=s1,host=ip_primary,port=Y,server,nowait -filter-redirector,id=r0,netdev=hn0,queue=tx/rx/all,indev=s0,outdev=s1 Signed-off-by: ZhangChen Signed-off-by: Wen Congyang --- net/Makefile.objs | 1 + net/filter-redirector.c | 245 ++++++++++++++++++++++++++++++++++++++++++++++++ qemu-options.hx | 6 ++ vl.c | 3 +- 4 files changed, 254 insertions(+), 1 deletion(-) create mode 100644 net/filter-redirector.c diff --git a/net/Makefile.objs b/net/Makefile.objs index 5fa2f97..f4290a5 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-redirector.o diff --git a/net/filter-redirector.c b/net/filter-redirector.c new file mode 100644 index 0000000..364e463 --- /dev/null +++ b/net/filter-redirector.c @@ -0,0 +1,245 @@ +/* + * 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_REDIRECTOR(obj) \ + OBJECT_CHECK(RedirectorState, (obj), TYPE_FILTER_REDIRECTOR) + +#define TYPE_FILTER_REDIRECTOR "filter-redirector" +#define REDIRECT_HEADER_LEN sizeof(uint32_t) + +typedef struct RedirectorState { + NetFilterState parent_obj; + NetQueue *incoming_queue;/* guest normal net queue */ + char *indev; + char *outdev; + CharDriverState *chr_in; + CharDriverState *chr_out; +} RedirectorState; + +static ssize_t filter_redirector_send(NetFilterState *nf, + const struct iovec *iov, + int iovcnt) +{ + RedirectorState *s = FILTER_REDIRECTOR(nf); + ssize_t ret = 0; + ssize_t size = 0; + uint32_t len = 0; + char *buf; + + size = iov_size(iov, iovcnt); + len = htonl(size); + if (!size) { + return 0; + } + + buf = g_malloc0(size); + iov_to_buf(iov, iovcnt, 0, buf, size); + ret = qemu_chr_fe_write_all(s->chr_out, (uint8_t *)&len, sizeof(len)); + if (ret < 0) { + g_free(buf); + return ret; + } + + ret = qemu_chr_fe_write_all(s->chr_out, (uint8_t *)buf, size); + g_free(buf); + return ret; +} + +static ssize_t filter_redirector_receive_iov(NetFilterState *nf, + NetClientState *sender, + unsigned flags, + const struct iovec *iov, + int iovcnt, + NetPacketSent *sent_cb) +{ + RedirectorState *s = FILTER_REDIRECTOR(nf); + ssize_t ret = 0; + + if (s->chr_out) { + ret = filter_redirector_send(nf, iov, iovcnt); + if (ret < 0) { + error_report("filter_redirector_send failed"); + } + } + return iov_size(iov, iovcnt); +} + +static void filter_redirector_cleanup(NetFilterState *nf) +{ + RedirectorState *s = FILTER_REDIRECTOR(nf); + + if (s->chr_in) { + qemu_chr_fe_release(s->chr_in); + } + if (s->chr_out) { + qemu_chr_fe_release(s->chr_out); + } +} + +static int redirector_chr_can_read(void *opaque) +{ + return REDIRECT_HEADER_LEN; +} + +static void redirector_chr_read(void *opaque, const uint8_t *buf, int size) +{ + NetFilterState *nf = opaque; + RedirectorState *s = FILTER_REDIRECTOR(nf); + uint32_t len; + ssize_t ret = 0; + uint8_t *recv_buf; + + if (size != REDIRECT_HEADER_LEN) { + // FIXME: do something else + error_report("packet is corruption, drop it"); + return; + } + memcpy(&len, buf, sizeof(len)); + len = ntohl(len); + + if (len > 0 && len < NET_BUFSIZE) { + recv_buf = g_malloc0(len); + ret = qemu_chr_fe_read_all(s->chr_in, recv_buf, len); + if (ret != len) { + error_report("filter-redirector recv buf failed"); + g_free(recv_buf); + return; + } + + ret = qemu_net_queue_send(s->incoming_queue, nf->netdev, + 0, (const uint8_t *)recv_buf, len, NULL); + g_free(recv_buf); + if (ret < 0) { + error_report("filter-redirector out to guest failed"); + } + } else { + error_report("filter-redirector recv len failed"); + } +} + +static void filter_redirector_setup(NetFilterState *nf, Error **errp) +{ + RedirectorState *s = FILTER_REDIRECTOR(nf); + + if (!s->indev && !s->outdev) { + error_setg(errp, "filter redirector needs 'indev' or " + "'outdev' at least one property set"); + return; + } + + if (s->indev) { + s->chr_in = qemu_chr_find(s->indev); + if (s->chr_in == NULL) { + error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, + "IN Device '%s' not found", s->indev); + return; + } + + qemu_chr_add_handlers(s->chr_in, redirector_chr_can_read, + redirector_chr_read, NULL, nf); + } + + if (s->outdev) { + s->chr_out = qemu_chr_find(s->outdev); + if (s->chr_out == NULL) { + error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, + "OUT Device '%s' not found", s->outdev); + return; + } + } + s->incoming_queue = qemu_new_net_queue(qemu_netfilter_pass_to_next, nf); +} + +static void filter_redirector_class_init(ObjectClass *oc, void *data) +{ + NetFilterClass *nfc = NETFILTER_CLASS(oc); + + nfc->setup = filter_redirector_setup; + nfc->cleanup = filter_redirector_cleanup; + nfc->receive_iov = filter_redirector_receive_iov; +} + +static char *filter_redirector_get_indev(Object *obj, Error **errp) +{ + RedirectorState *s = FILTER_REDIRECTOR(obj); + + return g_strdup(s->indev); +} + +static void +filter_redirector_set_indev(Object *obj, const char *value, Error **errp) +{ + RedirectorState *s = FILTER_REDIRECTOR(obj); + + g_free(s->indev); + s->indev = g_strdup(value); +} + +static char *filter_redirector_get_outdev(Object *obj, Error **errp) +{ + RedirectorState *s = FILTER_REDIRECTOR(obj); + + return g_strdup(s->outdev); +} + +static void +filter_redirector_set_outdev(Object *obj, const char *value, Error **errp) +{ + RedirectorState *s = FILTER_REDIRECTOR(obj); + + g_free(s->outdev); + s->outdev = g_strdup(value); +} + +static void filter_redirector_init(Object *obj) +{ + object_property_add_str(obj, "indev", filter_redirector_get_indev, + filter_redirector_set_indev, NULL); + object_property_add_str(obj, "outdev", filter_redirector_get_outdev, + filter_redirector_set_outdev, NULL); +} + +static void filter_redirector_fini(Object *obj) +{ + RedirectorState *s = FILTER_REDIRECTOR(obj); + + g_free(s->indev); + g_free(s->outdev); +} + +static const TypeInfo filter_redirector_info = { + .name = TYPE_FILTER_REDIRECTOR, + .parent = TYPE_NETFILTER, + .class_init = filter_redirector_class_init, + .instance_init = filter_redirector_init, + .instance_finalize = filter_redirector_fini, + .instance_size = sizeof(RedirectorState), +}; + +static void register_types(void) +{ + type_register_static(&filter_redirector_info); +} + +type_init(register_types); diff --git a/qemu-options.hx b/qemu-options.hx index f31a240..1f796ed 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -3745,6 +3745,12 @@ 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-redirector,id=@var{id},netdev=@var{netdevid},indev=@var{chardevid},outdev=@var{chardevid}[,queue=@var{all|rx|tx}] + +filter-redirector on netdev @var{netdevid},redirector can redirect filter's net packet to outdev. +and redirect indev's packet to filter. +queue @var{all|rx|tx} is an option that can be applied to filter-redirector. + @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 f043009..4a9a9a0 100644 --- a/vl.c +++ b/vl.c @@ -2801,7 +2801,8 @@ 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-redirector")) { return false; }