From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48441) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aOMK2-0003X1-WC for qemu-devel@nongnu.org; Wed, 27 Jan 2016 04:23:32 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aOMJy-0002lU-6s for qemu-devel@nongnu.org; Wed, 27 Jan 2016 04:23:30 -0500 Received: from szxga03-in.huawei.com ([119.145.14.66]:4193) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aOMJx-0002km-2c for qemu-devel@nongnu.org; Wed, 27 Jan 2016 04:23:26 -0500 References: <1453862428-25570-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> From: Hailiang Zhang Message-ID: <56A88C79.60304@huawei.com> Date: Wed, 27 Jan 2016 17:23:05 +0800 MIME-Version: 1.0 In-Reply-To: <1453862428-25570-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH V2] net/traffic-mirror:Add traffic-mirror List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Zhang Chen , qemu devel , Jason Wang Cc: Li Zhijian , Gui jianfeng , "eddie.dong" , peter.huangpeng@huawei.com, "Dr. David Alan Gilbert" , Yang Hongyang On 2016/1/27 10:40, Zhang Chen wrote: > From: ZhangChen > > Traffic-mirror is a netfilter plugin. > It gives qemu the ability to copy and mirror guest's > net packet. we output packet to chardev. > > usage: > > -netdev tap,id=hn0 > -chardev socket,id=mirror0,host=ip_primary,port=X,server,nowait > -traffic-mirror,id=m0,netdev=hn0,queue=tx/rx/all,outdev=mirror0 > > Signed-off-by: ZhangChen > Signed-off-by: Wen Congyang > Reviewed-by: Yang Hongyang > --- > net/Makefile.objs | 1 + > net/traffic-mirror.c | 173 +++++++++++++++++++++++++++++++++++++++++++++++++++ > qemu-options.hx | 5 ++ > vl.c | 3 +- > 4 files changed, 181 insertions(+), 1 deletion(-) > create mode 100644 net/traffic-mirror.c > > diff --git a/net/Makefile.objs b/net/Makefile.objs > index 5fa2f97..de06ebe 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 += traffic-mirror.o > diff --git a/net/traffic-mirror.c b/net/traffic-mirror.c > new file mode 100644 > index 0000000..bed915c > --- /dev/null > +++ b/net/traffic-mirror.c > @@ -0,0 +1,173 @@ > +/* > + * 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" > + > +#define FILTER_TRAFFIC_MIRROR(obj) \ > + OBJECT_CHECK(MirrorState, (obj), TYPE_FILTER_TRAFFIC_MIRROR) > + > +#define TYPE_FILTER_TRAFFIC_MIRROR "traffic-mirror" > + > +typedef struct MirrorState { > + NetFilterState parent_obj; > + char *outdev; > + CharDriverState *chr_out; > + Redundant space here. (Maybe it is no need for another version if there is no other problem ;) ). Other seems to be OK. Reviewed-by: zhanghailiang > +} MirrorState; > + > +static ssize_t traffic_mirror_send(NetFilterState *nf, > + const struct iovec *iov, > + int iovcnt) > +{ > + MirrorState *s = FILTER_TRAFFIC_MIRROR(nf); > + ssize_t ret = 0; > + ssize_t size = 0; > + char *buf; > + > + size = iov_size(iov, iovcnt); > + if (!size) { > + return 0; > + } > + > + buf = g_malloc0(size); > + iov_to_buf(iov, iovcnt, 0, buf, size); > + ret = qemu_chr_fe_write(s->chr_out, (uint8_t *)&size, sizeof(size)); > + if (ret < 0) { > + g_free(buf); > + return ret; > + } > + > + ret = qemu_chr_fe_write(s->chr_out, (uint8_t *)buf, size); > + g_free(buf); > + return ret; > +} > + > +static ssize_t traffic_mirror_receive_iov(NetFilterState *nf, > + NetClientState *sender, > + unsigned flags, > + const struct iovec *iov, > + int iovcnt, > + NetPacketSent *sent_cb) > +{ > + /* > + * We copy and mirror packet to outdev, > + * then put back the packet. > + */ > + ssize_t ret = 0; > + > + ret = traffic_mirror_send(nf, iov, iovcnt); > + if (ret < 0) { > + error_report("traffic_mirror_send failed"); > + } > + > + return 0; > +} > + > +static void traffic_mirror_cleanup(NetFilterState *nf) > +{ > + MirrorState *s = FILTER_TRAFFIC_MIRROR(nf); > + > + if (s->chr_out) { > + qemu_chr_fe_release(s->chr_out); > + } > +} > + > +static void traffic_mirror_setup(NetFilterState *nf, Error **errp) > +{ > + MirrorState *s = FILTER_TRAFFIC_MIRROR(nf); > + > + if (!s->outdev) { > + error_setg(errp, "filter traffic 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 traffic_mirror_class_init(ObjectClass *oc, void *data) > +{ > + NetFilterClass *nfc = NETFILTER_CLASS(oc); > + > + nfc->setup = traffic_mirror_setup; > + nfc->cleanup = traffic_mirror_cleanup; > + nfc->receive_iov = traffic_mirror_receive_iov; > +} > + > +static char *traffic_mirror_get_outdev(Object *obj, Error **errp) > +{ > + MirrorState *s = FILTER_TRAFFIC_MIRROR(obj); > + > + return g_strdup(s->outdev); > +} > + > +static void > +traffic_mirror_set_outdev(Object *obj, const char *value, Error **errp) > +{ > + MirrorState *s = FILTER_TRAFFIC_MIRROR(obj); > + > + g_free(s->outdev); > + s->outdev = g_strdup(value); > + if (!s->outdev) { > + error_setg(errp, "filter traffic mirror needs 'outdev' " > + "property set!"); > + return; > + } > +} > + > +static void traffic_mirror_init(Object *obj) > +{ > + object_property_add_str(obj, "outdev", traffic_mirror_get_outdev, > + traffic_mirror_set_outdev, NULL); > +} > + > +static void traffic_mirror_fini(Object *obj) > +{ > + MirrorState *s = FILTER_TRAFFIC_MIRROR(obj); > + > + g_free(s->outdev); > +} > + > +static const TypeInfo traffic_mirror_info = { > + .name = TYPE_FILTER_TRAFFIC_MIRROR, > + .parent = TYPE_NETFILTER, > + .class_init = traffic_mirror_class_init, > + .instance_init = traffic_mirror_init, > + .instance_finalize = traffic_mirror_fini, > + .instance_size = sizeof(MirrorState), > +}; > + > +static void register_types(void) > +{ > + type_register_static(&traffic_mirror_info); > +} > + > +type_init(register_types); > diff --git a/qemu-options.hx b/qemu-options.hx > index 0eea4ee..6fd2d46 100644 > --- a/qemu-options.hx > +++ b/qemu-options.hx > @@ -3670,6 +3670,11 @@ 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 traffic-mirror,id=@var{id},netdev=@var{netdevid},outdev=@var{chardevid}[,queue=@var{all|rx|tx}] > + > +traffic-mirror on netdev @var{netdevid},mirror net packet to outdev. > +queue @var{all|rx|tx} is an option that can be applied to traffic-mirror. > + > @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 8dc34ce..413d73a 100644 > --- a/vl.c > +++ b/vl.c > @@ -2838,7 +2838,8 @@ 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, "traffic-mirror")) { > return false; > } > >