From patchwork Mon Feb 29 12:23:54 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Chen X-Patchwork-Id: 8452721 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 1E046C0553 for ; Mon, 29 Feb 2016 12:24:41 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3230C2025A for ; Mon, 29 Feb 2016 12:24:40 +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 D6F1520220 for ; Mon, 29 Feb 2016 12:24:38 +0000 (UTC) Received: from localhost ([::1]:36258 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aaMsQ-0007yz-5n for patchwork-qemu-devel@patchwork.kernel.org; Mon, 29 Feb 2016 07:24:38 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38661) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aaMrx-0007jJ-Kw for qemu-devel@nongnu.org; Mon, 29 Feb 2016 07:24:15 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aaMrr-00056g-6H for qemu-devel@nongnu.org; Mon, 29 Feb 2016 07:24:09 -0500 Received: from [59.151.112.132] (port=10467 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aaMro-00051A-6Z for qemu-devel@nongnu.org; Mon, 29 Feb 2016 07:24:03 -0500 X-IronPort-AV: E=Sophos;i="5.22,518,1449504000"; d="scan'208";a="4026243" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 29 Feb 2016 20:23:38 +0800 Received: from G08CNEXCHPEKD02.g08.fujitsu.local (unknown [10.167.33.83]) by cn.fujitsu.com (Postfix) with ESMTP id B891042B4AF5; Mon, 29 Feb 2016 20:23:32 +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; Mon, 29 Feb 2016 20:23:32 +0800 From: Zhang Chen To: qemu devel , Jason Wang Date: Mon, 29 Feb 2016 20:23:54 +0800 Message-ID: <1456748635-1912-3-git-send-email-zhangchen.fnst@cn.fujitsu.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1456748635-1912-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> References: <1456748635-1912-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.226.56] X-yoursite-MailScanner-ID: B891042B4AF5.A06EF 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 V2 2/3] 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+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 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 | | v filter------> guest 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: Zhang Chen Signed-off-by: Wen Congyang --- net/Makefile.objs | 1 + net/filter-redirector.c | 216 ++++++++++++++++++++++++++++++++++++++++++++++++ qemu-options.hx | 8 ++ vl.c | 3 +- 4 files changed, 227 insertions(+), 1 deletion(-) create mode 100644 net/filter-redirector.c diff --git a/net/Makefile.objs b/net/Makefile.objs index b7c22fd..8af9932 100644 --- a/net/Makefile.objs +++ b/net/Makefile.objs @@ -16,3 +16,4 @@ common-obj-$(CONFIG_NETMAP) += netmap.o common-obj-y += filter.o common-obj-y += filter-buffer.o common-obj-y += filter-mirror.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..d0eb76d --- /dev/null +++ b/net/filter-redirector.c @@ -0,0 +1,216 @@ +/* + * 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-traffic.h" + +#define FILTER_REDIRECTOR(obj) \ + OBJECT_CHECK(TrafficState, (obj), TYPE_FILTER_REDIRECTOR) + +#define TYPE_FILTER_REDIRECTOR "filter-redirector" +#define REDIRECT_HEADER_LEN sizeof(uint32_t) + +static int filter_redirector_send(NetFilterState *nf, + const struct iovec *iov, + int iovcnt) +{ + return filter_traffic_send(nf, iov, iovcnt); +} + +static ssize_t filter_redirector_receive_iov(NetFilterState *nf, + NetClientState *sender, + unsigned flags, + const struct iovec *iov, + int iovcnt, + NetPacketSent *sent_cb) +{ + TrafficState *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); + } else { + return 0; + } +} + +static void filter_redirector_cleanup(NetFilterState *nf) +{ + TrafficState *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; + TrafficState *s = FILTER_REDIRECTOR(nf); + uint32_t len; + int ret = 0; + uint8_t *recv_buf; + int offset = size; + + while (offset < REDIRECT_HEADER_LEN) { + ret = s->chr_in->chr_sync_read(s->chr_in, (uint8_t *)buf + offset, + REDIRECT_HEADER_LEN - offset); + if (ret == -1 && errno == EAGAIN) { + g_usleep(100); + } + offset += ret; + } + + memcpy(&len, buf, sizeof(len)); + len = ntohl(len); + + if (len > 0 && len < NET_BUFSIZE) { + recv_buf = g_malloc(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) +{ + TrafficState *s = FILTER_REDIRECTOR(nf); + + if (!s->indev && !s->outdev) { + error_setg(errp, "filter redirector needs 'indev' or " + "'outdev' at least one property set"); + return; + } else if (s->indev == s->outdev) { + error_setg(errp, "filter redirector needs 'indev' and " + "'outdev' are not same"); + 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_fe_claim_no_fail(s->chr_in); + 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; + } + qemu_chr_fe_claim_no_fail(s->chr_out); + } + 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) +{ + TrafficState *s = FILTER_REDIRECTOR(obj); + + return g_strdup(s->indev); +} + +static void +filter_redirector_set_indev(Object *obj, const char *value, Error **errp) +{ + TrafficState *s = FILTER_REDIRECTOR(obj); + + g_free(s->indev); + s->indev = g_strdup(value); +} + +static char *filter_redirector_get_outdev(Object *obj, Error **errp) +{ + TrafficState *s = FILTER_REDIRECTOR(obj); + + return g_strdup(s->outdev); +} + +static void +filter_redirector_set_outdev(Object *obj, const char *value, Error **errp) +{ + TrafficState *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) +{ + TrafficState *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(TrafficState), +}; + +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 ca27863..84584e3 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -3764,6 +3764,14 @@ queue @var{all|rx|tx} is an option that can be applied to any netfilter. filter-mirror on netdev @var{netdevid},mirror net packet to chardev @var{chardevid} +@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},redirect filter's net packet to chardev +@var{chardevid},and redirect indev's packet to filter. +Create a filter-redirector we need to differ outdev id from indev id, id can not +be the same. we can just use indev or outdev, but at least one to be set. + @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 d68533a..c389a3f 100644 --- a/vl.c +++ b/vl.c @@ -2799,7 +2799,8 @@ static bool object_create_initial(const char *type) */ if (g_str_equal(type, "filter-buffer") || g_str_equal(type, "filter-dump") || - g_str_equal(type, "filter-mirror")) { + g_str_equal(type, "filter-mirror") || + g_str_equal(type, "filter-redirector")) { return false; }