| Message ID | 1456228821-9684-2-git-send-email-zhangchen.fnst@cn.fujitsu.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 02/23/2016 08:00 PM, Zhang Chen wrote: > 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 <zhangchen.fnst@cn.fujitsu.com> > Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> > Reviewed-by: Yang Hongyang <hongyang.yang@easystack.cn> > Reviewed-by: zhanghailiang <zhang.zhanghailiang@huawei.com> > --- > 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..ad722f7 > --- /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 <zhangchen.fnst@cn.fujitsu.com> > + * > + * 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; The indentation looks odd here. Other looks good. > +} > + > +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; > } >
On 02/24/2016 11:22 AM, Jason Wang wrote: > > On 02/23/2016 08:00 PM, Zhang Chen wrote: >> 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 <zhangchen.fnst@cn.fujitsu.com> >> Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> >> Reviewed-by: Yang Hongyang <hongyang.yang@easystack.cn> >> Reviewed-by: zhanghailiang <zhang.zhanghailiang@huawei.com> >> --- >> 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..ad722f7 >> --- /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 <zhangchen.fnst@cn.fujitsu.com> >> + * >> + * 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; > The indentation looks odd here. > > Other looks good. Thanks~~ fix it in next version~ zhangchen >> +} >> + >> +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; >> } >> > > > . >
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..ad722f7 --- /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 <zhangchen.fnst@cn.fujitsu.com> + * + * 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; }