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authorZhang Chen <zhangchen.fnst@cn.fujitsu.com>2016-09-27 10:22:26 +0800
committerJason Wang <jasowang@redhat.com>2016-09-27 17:54:21 +0800
commit7dce4e6fd2baa4935074fa03736588017c1a8b84 (patch)
tree88eb7ef7fb65897e0f58a232e5f8d7148ace74db /net/colo-compare.c
parente92aa36ac89fad49dc18d88e1d40f0d0fccdfa83 (diff)
colo-compare: introduce colo compare initialization
This a COLO net ascii figure: Primary qemu Secondary qemu +--------------------------------------------------------------+ +----------------------------------------------------------------+ | +----------------------------------------------------------+ | | +-----------------------------------------------------------+ | | | | | | | | | | | guest | | | | guest | | | | | | | | | | | +-------^--------------------------+-----------------------+ | | +---------------------+--------+----------------------------+ | | | | | | ^ | | | | | | | | | | | | +------------------------------------------------------+ | | | | |netfilter| | | | | | netfilter | | | | +----------+ +----------------------------+ | | | +-----------------------------------------------------------+ | | | | | | | out | | | | | | filter excute order | | | | | | +-----------------------------+ | | | | | | +-------------------> | | | | | | | | | | | | | | | | TCP | | | | +-----+--+-+ +-----v----+ +-----v----+ |pri +----+----+sec| | | | +------------+ +---+----+---v+rewriter++ +------------+ | | | | | | | | | | |in | |in | | | | | | | | | | | | | | | | filter | | filter | | filter +------> colo <------+ +--------> filter +--> adjust | adjust +--> filter | | | | | | mirror | |redirector| |redirector| | | compare | | | | | | redirector | | ack | seq | | redirector | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +----^-----+ +----+-----+ +----------+ | +---------+ | | | | +------------+ +--------+--------------+ +---+--------+ | | | | | tx | rx rx | | | | | tx all | rx | | | | | | | | | | +-----------------------------------------------------------+ | | | | +--------------+ | | | | | | | | | filter excute order | | | | | | | | | | +----------------> | | | +--------------------------------------------------------+ | | +-----------------------------------------+ | | | | | | | | | +--------------------------------------------------------------+ +----------------------------------------------------------------+ |guest receive | guest send | | +--------+----------------------------v------------------------+ | | NOTE: filter direction is rx/tx/all | tap | rx:receive packets sent to the netdev | | tx:receive packets sent by the netdev +--------------------------------------------------------------+ In COLO-compare, we do packet comparing job. Packets coming from the primary char indev will be sent to outdev. Packets coming from the secondary char dev will be dropped after comparing. colo-comapre need two input chardev and one output chardev: primary_in=chardev1-id (source: primary send packet) secondary_in=chardev2-id (source: secondary send packet) outdev=chardev3-id usage: primary: -netdev tap,id=hn0,vhost=off,script=/etc/qemu-ifup,downscript=/etc/qemu-ifdown -device e1000,id=e0,netdev=hn0,mac=52:a4:00:12:78:66 -chardev socket,id=mirror0,host=3.3.3.3,port=9003,server,nowait -chardev socket,id=compare1,host=3.3.3.3,port=9004,server,nowait -chardev socket,id=compare0,host=3.3.3.3,port=9001,server,nowait -chardev socket,id=compare0-0,host=3.3.3.3,port=9001 -chardev socket,id=compare_out,host=3.3.3.3,port=9005,server,nowait -chardev socket,id=compare_out0,host=3.3.3.3,port=9005 -object filter-mirror,id=m0,netdev=hn0,queue=tx,outdev=mirror0 -object filter-redirector,netdev=hn0,id=redire0,queue=rx,indev=compare_out -object filter-redirector,netdev=hn0,id=redire1,queue=rx,outdev=compare0 -object colo-compare,id=comp0,primary_in=compare0-0,secondary_in=compare1,outdev=compare_out0 secondary: -netdev tap,id=hn0,vhost=off,script=/etc/qemu-ifup,down script=/etc/qemu-ifdown -device e1000,netdev=hn0,mac=52:a4:00:12:78:66 -chardev socket,id=red0,host=3.3.3.3,port=9003 -chardev socket,id=red1,host=3.3.3.3,port=9004 -object filter-redirector,id=f1,netdev=hn0,queue=tx,indev=red0 -object filter-redirector,id=f2,netdev=hn0,queue=rx,outdev=red1 Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com> Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com> Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> Signed-off-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'net/colo-compare.c')
-rw-r--r--net/colo-compare.c270
1 files changed, 270 insertions, 0 deletions
diff --git a/net/colo-compare.c b/net/colo-compare.c
new file mode 100644
index 0000000000..dc5f70ca50
--- /dev/null
+++ b/net/colo-compare.c
@@ -0,0 +1,270 @@
+/*
+ * COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO)
+ * (a.k.a. Fault Tolerance or Continuous Replication)
+ *
+ * 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 "qemu/error-report.h"
+#include "qemu-common.h"
+#include "qapi/qmp/qerror.h"
+#include "qapi/error.h"
+#include "net/net.h"
+#include "qom/object_interfaces.h"
+#include "qemu/iov.h"
+#include "qom/object.h"
+#include "qemu/typedefs.h"
+#include "net/queue.h"
+#include "sysemu/char.h"
+#include "qemu/sockets.h"
+#include "qapi-visit.h"
+
+#define TYPE_COLO_COMPARE "colo-compare"
+#define COLO_COMPARE(obj) \
+ OBJECT_CHECK(CompareState, (obj), TYPE_COLO_COMPARE)
+
+#define COMPARE_READ_LEN_MAX NET_BUFSIZE
+
+typedef struct CompareState {
+ Object parent;
+
+ char *pri_indev;
+ char *sec_indev;
+ char *outdev;
+ CharDriverState *chr_pri_in;
+ CharDriverState *chr_sec_in;
+ CharDriverState *chr_out;
+ SocketReadState pri_rs;
+ SocketReadState sec_rs;
+} CompareState;
+
+typedef struct CompareClass {
+ ObjectClass parent_class;
+} CompareClass;
+
+typedef struct CompareChardevProps {
+ bool is_socket;
+} CompareChardevProps;
+
+static char *compare_get_pri_indev(Object *obj, Error **errp)
+{
+ CompareState *s = COLO_COMPARE(obj);
+
+ return g_strdup(s->pri_indev);
+}
+
+static void compare_set_pri_indev(Object *obj, const char *value, Error **errp)
+{
+ CompareState *s = COLO_COMPARE(obj);
+
+ g_free(s->pri_indev);
+ s->pri_indev = g_strdup(value);
+}
+
+static char *compare_get_sec_indev(Object *obj, Error **errp)
+{
+ CompareState *s = COLO_COMPARE(obj);
+
+ return g_strdup(s->sec_indev);
+}
+
+static void compare_set_sec_indev(Object *obj, const char *value, Error **errp)
+{
+ CompareState *s = COLO_COMPARE(obj);
+
+ g_free(s->sec_indev);
+ s->sec_indev = g_strdup(value);
+}
+
+static char *compare_get_outdev(Object *obj, Error **errp)
+{
+ CompareState *s = COLO_COMPARE(obj);
+
+ return g_strdup(s->outdev);
+}
+
+static void compare_set_outdev(Object *obj, const char *value, Error **errp)
+{
+ CompareState *s = COLO_COMPARE(obj);
+
+ g_free(s->outdev);
+ s->outdev = g_strdup(value);
+}
+
+static void compare_pri_rs_finalize(SocketReadState *pri_rs)
+{
+ /* if packet_enqueue pri pkt failed we will send unsupported packet */
+}
+
+static void compare_sec_rs_finalize(SocketReadState *sec_rs)
+{
+ /* if packet_enqueue sec pkt failed we will notify trace */
+}
+
+static int compare_chardev_opts(void *opaque,
+ const char *name, const char *value,
+ Error **errp)
+{
+ CompareChardevProps *props = opaque;
+
+ if (strcmp(name, "backend") == 0 &&
+ strcmp(value, "socket") == 0) {
+ props->is_socket = true;
+ return 0;
+ } else if (strcmp(name, "host") == 0 ||
+ (strcmp(name, "port") == 0) ||
+ (strcmp(name, "server") == 0) ||
+ (strcmp(name, "wait") == 0) ||
+ (strcmp(name, "path") == 0)) {
+ return 0;
+ } else {
+ error_setg(errp,
+ "COLO-compare does not support a chardev with option %s=%s",
+ name, value);
+ return -1;
+ }
+}
+
+/*
+ * Return 0 is success.
+ * Return 1 is failed.
+ */
+static int find_and_check_chardev(CharDriverState **chr,
+ char *chr_name,
+ Error **errp)
+{
+ CompareChardevProps props;
+
+ *chr = qemu_chr_find(chr_name);
+ if (*chr == NULL) {
+ error_setg(errp, "Device '%s' not found",
+ chr_name);
+ return 1;
+ }
+
+ memset(&props, 0, sizeof(props));
+ if (qemu_opt_foreach((*chr)->opts, compare_chardev_opts, &props, errp)) {
+ return 1;
+ }
+
+ if (!props.is_socket) {
+ error_setg(errp, "chardev \"%s\" is not a tcp socket",
+ chr_name);
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * Called from the main thread on the primary
+ * to setup colo-compare.
+ */
+static void colo_compare_complete(UserCreatable *uc, Error **errp)
+{
+ CompareState *s = COLO_COMPARE(uc);
+
+ if (!s->pri_indev || !s->sec_indev || !s->outdev) {
+ error_setg(errp, "colo compare needs 'primary_in' ,"
+ "'secondary_in','outdev' property set");
+ return;
+ } else if (!strcmp(s->pri_indev, s->outdev) ||
+ !strcmp(s->sec_indev, s->outdev) ||
+ !strcmp(s->pri_indev, s->sec_indev)) {
+ error_setg(errp, "'indev' and 'outdev' could not be same "
+ "for compare module");
+ return;
+ }
+
+ if (find_and_check_chardev(&s->chr_pri_in, s->pri_indev, errp)) {
+ return;
+ }
+
+ if (find_and_check_chardev(&s->chr_sec_in, s->sec_indev, errp)) {
+ return;
+ }
+
+ if (find_and_check_chardev(&s->chr_out, s->outdev, errp)) {
+ return;
+ }
+
+ qemu_chr_fe_claim_no_fail(s->chr_pri_in);
+
+ qemu_chr_fe_claim_no_fail(s->chr_sec_in);
+
+ qemu_chr_fe_claim_no_fail(s->chr_out);
+
+ net_socket_rs_init(&s->pri_rs, compare_pri_rs_finalize);
+ net_socket_rs_init(&s->sec_rs, compare_sec_rs_finalize);
+
+ return;
+}
+
+static void colo_compare_class_init(ObjectClass *oc, void *data)
+{
+ UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
+
+ ucc->complete = colo_compare_complete;
+}
+
+static void colo_compare_init(Object *obj)
+{
+ object_property_add_str(obj, "primary_in",
+ compare_get_pri_indev, compare_set_pri_indev,
+ NULL);
+ object_property_add_str(obj, "secondary_in",
+ compare_get_sec_indev, compare_set_sec_indev,
+ NULL);
+ object_property_add_str(obj, "outdev",
+ compare_get_outdev, compare_set_outdev,
+ NULL);
+}
+
+static void colo_compare_finalize(Object *obj)
+{
+ CompareState *s = COLO_COMPARE(obj);
+
+ if (s->chr_pri_in) {
+ qemu_chr_add_handlers(s->chr_pri_in, NULL, NULL, NULL, NULL);
+ qemu_chr_fe_release(s->chr_pri_in);
+ }
+ if (s->chr_sec_in) {
+ qemu_chr_add_handlers(s->chr_sec_in, NULL, NULL, NULL, NULL);
+ qemu_chr_fe_release(s->chr_sec_in);
+ }
+ if (s->chr_out) {
+ qemu_chr_fe_release(s->chr_out);
+ }
+
+ g_free(s->pri_indev);
+ g_free(s->sec_indev);
+ g_free(s->outdev);
+}
+
+static const TypeInfo colo_compare_info = {
+ .name = TYPE_COLO_COMPARE,
+ .parent = TYPE_OBJECT,
+ .instance_size = sizeof(CompareState),
+ .instance_init = colo_compare_init,
+ .instance_finalize = colo_compare_finalize,
+ .class_size = sizeof(CompareClass),
+ .class_init = colo_compare_class_init,
+ .interfaces = (InterfaceInfo[]) {
+ { TYPE_USER_CREATABLE },
+ { }
+ }
+};
+
+static void register_types(void)
+{
+ type_register_static(&colo_compare_info);
+}
+
+type_init(register_types);