diff options
| -rw-r--r-- | net/Makefile.objs | 1 | ||||
| -rw-r--r-- | net/filter-rewriter.c | 105 | ||||
| -rw-r--r-- | qemu-options.hx | 13 | ||||
| -rw-r--r-- | vl.c | 3 |
4 files changed, 121 insertions, 1 deletions
diff --git a/net/Makefile.objs b/net/Makefile.objs index beb504bbff..2a80df5fa7 100644 --- a/net/Makefile.objs +++ b/net/Makefile.objs @@ -18,3 +18,4 @@ common-obj-y += filter-buffer.o common-obj-y += filter-mirror.o common-obj-y += colo-compare.o common-obj-y += colo.o +common-obj-y += filter-rewriter.o diff --git a/net/filter-rewriter.c b/net/filter-rewriter.c new file mode 100644 index 0000000000..de29f07cb6 --- /dev/null +++ b/net/filter-rewriter.c @@ -0,0 +1,105 @@ +/* + * 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 "qemu/osdep.h" +#include "net/colo.h" +#include "net/filter.h" +#include "net/net.h" +#include "qemu-common.h" +#include "qapi/error.h" +#include "qapi/qmp/qerror.h" +#include "qapi-visit.h" +#include "qom/object.h" +#include "qemu/main-loop.h" +#include "qemu/iov.h" +#include "net/checksum.h" + +#define FILTER_COLO_REWRITER(obj) \ + OBJECT_CHECK(RewriterState, (obj), TYPE_FILTER_REWRITER) + +#define TYPE_FILTER_REWRITER "filter-rewriter" + +typedef struct RewriterState { + NetFilterState parent_obj; + NetQueue *incoming_queue; + /* hashtable to save connection */ + GHashTable *connection_track_table; +} RewriterState; + +static void filter_rewriter_flush(NetFilterState *nf) +{ + RewriterState *s = FILTER_COLO_REWRITER(nf); + + if (!qemu_net_queue_flush(s->incoming_queue)) { + /* Unable to empty the queue, purge remaining packets */ + qemu_net_queue_purge(s->incoming_queue, nf->netdev); + } +} + +static ssize_t colo_rewriter_receive_iov(NetFilterState *nf, + NetClientState *sender, + unsigned flags, + const struct iovec *iov, + int iovcnt, + NetPacketSent *sent_cb) +{ + /* + * if we get tcp packet + * we will rewrite it to make secondary guest's + * connection established successfully + */ + return 0; +} + +static void colo_rewriter_cleanup(NetFilterState *nf) +{ + RewriterState *s = FILTER_COLO_REWRITER(nf); + + /* flush packets */ + if (s->incoming_queue) { + filter_rewriter_flush(nf); + g_free(s->incoming_queue); + } +} + +static void colo_rewriter_setup(NetFilterState *nf, Error **errp) +{ + RewriterState *s = FILTER_COLO_REWRITER(nf); + + s->connection_track_table = g_hash_table_new_full(connection_key_hash, + connection_key_equal, + g_free, + connection_destroy); + s->incoming_queue = qemu_new_net_queue(qemu_netfilter_pass_to_next, nf); +} + +static void colo_rewriter_class_init(ObjectClass *oc, void *data) +{ + NetFilterClass *nfc = NETFILTER_CLASS(oc); + + nfc->setup = colo_rewriter_setup; + nfc->cleanup = colo_rewriter_cleanup; + nfc->receive_iov = colo_rewriter_receive_iov; +} + +static const TypeInfo colo_rewriter_info = { + .name = TYPE_FILTER_REWRITER, + .parent = TYPE_NETFILTER, + .class_init = colo_rewriter_class_init, + .instance_size = sizeof(RewriterState), +}; + +static void register_types(void) +{ + type_register_static(&colo_rewriter_info); +} + +type_init(register_types); diff --git a/qemu-options.hx b/qemu-options.hx index d0ed69aa10..987d055481 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -3887,6 +3887,19 @@ 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 of indev or outdev need to be specified. +@item -object filter-rewriter,id=@var{id},netdev=@var{netdevid},rewriter-mode=@var{mode}[,queue=@var{all|rx|tx}] + +Filter-rewriter is a part of COLO project.It will rewrite tcp packet to +secondary from primary to keep secondary tcp connection,and rewrite +tcp packet to primary from secondary make tcp packet can be handled by +client. + +usage: +colo secondary: +-object filter-redirector,id=f1,netdev=hn0,queue=tx,indev=red0 +-object filter-redirector,id=f2,netdev=hn0,queue=rx,outdev=red1 +-object filter-rewriter,id=rew0,netdev=hn0,queue=all + @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 @@ -2846,7 +2846,8 @@ static bool object_create_initial(const char *type) g_str_equal(type, "filter-dump") || g_str_equal(type, "filter-mirror") || g_str_equal(type, "filter-redirector") || - g_str_equal(type, "colo-compare")) { + g_str_equal(type, "colo-compare") || + g_str_equal(type, "filter-rewriter")) { return false; } |