net/colo.c: add colo.c to define and handle packet
The net/colo.c is used by colo-compare and filter-rewriter. this can share common data structure like net packet, and other functions. 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>
This commit is contained in:
Zhang Chen
Jason Wang
parent
7dce4e6fd2
commit
59509ec16b
@ -17,3 +17,4 @@ common-obj-y += filter.o
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common-obj-y += filter-buffer.o
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common-obj-y += filter-mirror.o
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common-obj-y += colo-compare.o
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common-obj-y += colo.o
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@ -14,6 +14,7 @@
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#include "qemu/osdep.h"
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#include "qemu/error-report.h"
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#include "trace.h"
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#include "qemu-common.h"
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#include "qapi/qmp/qerror.h"
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#include "qapi/error.h"
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@ -26,13 +27,34 @@
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#include "sysemu/char.h"
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#include "qemu/sockets.h"
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#include "qapi-visit.h"
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#include "net/colo.h"
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#define TYPE_COLO_COMPARE "colo-compare"
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#define COLO_COMPARE(obj) \
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OBJECT_CHECK(CompareState, (obj), TYPE_COLO_COMPARE)
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#define COMPARE_READ_LEN_MAX NET_BUFSIZE
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/*
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+ CompareState ++
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| |
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+---------------+ +---------------+ +---------------+
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|conn list +--->conn +--------->conn |
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+---------------+ +---------------+ +---------------+
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| | | | | |
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+---------------+ +---v----+ +---v----+ +---v----+ +---v----+
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|primary | |secondary |primary | |secondary
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|packet | |packet + |packet | |packet +
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+--------+ +--------+ +--------+ +--------+
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| | | |
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+---v----+ +---v----+ +---v----+ +---v----+
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|primary | |secondary |primary | |secondary
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|packet | |packet + |packet | |packet +
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+--------+ +--------+ +--------+ +--------+
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| | | |
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+---v----+ +---v----+ +---v----+ +---v----+
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|primary | |secondary |primary | |secondary
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|packet | |packet + |packet | |packet +
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+--------+ +--------+ +--------+ +--------+
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*/
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typedef struct CompareState {
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Object parent;
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@ -44,6 +66,9 @@ typedef struct CompareState {
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CharDriverState *chr_out;
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SocketReadState pri_rs;
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SocketReadState sec_rs;
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/* hashtable to save connection */
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GHashTable *connection_track_table;
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} CompareState;
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typedef struct CompareClass {
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@ -54,6 +79,76 @@ typedef struct CompareChardevProps {
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bool is_socket;
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} CompareChardevProps;
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enum {
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PRIMARY_IN = 0,
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SECONDARY_IN,
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};
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static int compare_chr_send(CharDriverState *out,
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const uint8_t *buf,
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uint32_t size);
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/*
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* Return 0 on success, if return -1 means the pkt
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* is unsupported(arp and ipv6) and will be sent later
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*/
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static int packet_enqueue(CompareState *s, int mode)
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{
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Packet *pkt = NULL;
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if (mode == PRIMARY_IN) {
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pkt = packet_new(s->pri_rs.buf, s->pri_rs.packet_len);
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} else {
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pkt = packet_new(s->sec_rs.buf, s->sec_rs.packet_len);
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}
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if (parse_packet_early(pkt)) {
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packet_destroy(pkt, NULL);
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pkt = NULL;
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return -1;
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}
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/* TODO: get connection key from pkt */
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/*
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* TODO: use connection key get conn from
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* connection_track_table
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*/
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/*
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* TODO: insert pkt to it's conn->primary_list
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* or conn->secondary_list
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*/
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return 0;
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}
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static int compare_chr_send(CharDriverState *out,
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const uint8_t *buf,
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uint32_t size)
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{
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int ret = 0;
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uint32_t len = htonl(size);
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if (!size) {
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return 0;
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}
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ret = qemu_chr_fe_write_all(out, (uint8_t *)&len, sizeof(len));
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if (ret != sizeof(len)) {
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goto err;
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}
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ret = qemu_chr_fe_write_all(out, (uint8_t *)buf, size);
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if (ret != size) {
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goto err;
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}
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return 0;
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err:
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return ret < 0 ? ret : -EIO;
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}
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static char *compare_get_pri_indev(Object *obj, Error **errp)
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{
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CompareState *s = COLO_COMPARE(obj);
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@ -101,12 +196,21 @@ static void compare_set_outdev(Object *obj, const char *value, Error **errp)
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static void compare_pri_rs_finalize(SocketReadState *pri_rs)
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{
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/* if packet_enqueue pri pkt failed we will send unsupported packet */
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CompareState *s = container_of(pri_rs, CompareState, pri_rs);
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if (packet_enqueue(s, PRIMARY_IN)) {
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trace_colo_compare_main("primary: unsupported packet in");
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compare_chr_send(s->chr_out, pri_rs->buf, pri_rs->packet_len);
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}
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}
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static void compare_sec_rs_finalize(SocketReadState *sec_rs)
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{
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/* if packet_enqueue sec pkt failed we will notify trace */
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CompareState *s = container_of(sec_rs, CompareState, sec_rs);
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if (packet_enqueue(s, SECONDARY_IN)) {
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trace_colo_compare_main("secondary: unsupported packet in");
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}
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}
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static int compare_chardev_opts(void *opaque,
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@ -204,6 +308,8 @@ static void colo_compare_complete(UserCreatable *uc, Error **errp)
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net_socket_rs_init(&s->pri_rs, compare_pri_rs_finalize);
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net_socket_rs_init(&s->sec_rs, compare_sec_rs_finalize);
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/* use g_hash_table_new_full() to new a hashtable */
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return;
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}
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86
net/colo.c
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86
net/colo.c
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@ -0,0 +1,86 @@
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/*
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* COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO)
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* (a.k.a. Fault Tolerance or Continuous Replication)
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*
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* Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
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* Copyright (c) 2016 FUJITSU LIMITED
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* Copyright (c) 2016 Intel Corporation
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*
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* Author: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* later. See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "trace.h"
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#include "net/colo.h"
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int parse_packet_early(Packet *pkt)
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{
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int network_length;
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static const uint8_t vlan[] = {0x81, 0x00};
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uint8_t *data = pkt->data;
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uint16_t l3_proto;
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ssize_t l2hdr_len = eth_get_l2_hdr_length(data);
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if (pkt->size < ETH_HLEN) {
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trace_colo_proxy_main("pkt->size < ETH_HLEN");
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return 1;
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}
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/*
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* TODO: support vlan.
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*/
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if (!memcmp(&data[12], vlan, sizeof(vlan))) {
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trace_colo_proxy_main("COLO-proxy don't support vlan");
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return 1;
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}
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pkt->network_header = data + l2hdr_len;
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const struct iovec l2vec = {
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.iov_base = (void *) data,
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.iov_len = l2hdr_len
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};
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l3_proto = eth_get_l3_proto(&l2vec, 1, l2hdr_len);
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if (l3_proto != ETH_P_IP) {
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return 1;
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}
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network_length = pkt->ip->ip_hl * 4;
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if (pkt->size < l2hdr_len + network_length) {
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trace_colo_proxy_main("pkt->size < network_header + network_length");
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return 1;
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}
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pkt->transport_header = pkt->network_header + network_length;
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return 0;
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}
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Packet *packet_new(const void *data, int size)
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{
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Packet *pkt = g_slice_new(Packet);
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pkt->data = g_memdup(data, size);
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pkt->size = size;
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return pkt;
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}
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void packet_destroy(void *opaque, void *user_data)
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{
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Packet *pkt = opaque;
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g_free(pkt->data);
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g_slice_free(Packet, pkt);
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}
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/*
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* Clear hashtable, stop this hash growing really huge
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*/
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void connection_hashtable_reset(GHashTable *connection_track_table)
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{
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g_hash_table_remove_all(connection_track_table);
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}
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37
net/colo.h
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37
net/colo.h
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@ -0,0 +1,37 @@
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/*
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* COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO)
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* (a.k.a. Fault Tolerance or Continuous Replication)
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*
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* Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
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* Copyright (c) 2016 FUJITSU LIMITED
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* Copyright (c) 2016 Intel Corporation
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*
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* Author: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* later. See the COPYING file in the top-level directory.
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*/
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#ifndef QEMU_COLO_PROXY_H
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#define QEMU_COLO_PROXY_H
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#include "slirp/slirp.h"
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#define HASHTABLE_MAX_SIZE 16384
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typedef struct Packet {
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void *data;
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union {
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uint8_t *network_header;
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struct ip *ip;
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};
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uint8_t *transport_header;
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int size;
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} Packet;
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int parse_packet_early(Packet *pkt);
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void connection_hashtable_reset(GHashTable *connection_track_table);
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Packet *packet_new(const void *data, int size);
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void packet_destroy(void *opaque, void *user_data);
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#endif /* QEMU_COLO_PROXY_H */
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@ -139,6 +139,12 @@ memory_region_subpage_write(int cpu_index, void *mr, uint64_t offset, uint64_t v
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memory_region_tb_read(int cpu_index, uint64_t addr, uint64_t value, unsigned size) "cpu %d addr %#"PRIx64" value %#"PRIx64" size %u"
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memory_region_tb_write(int cpu_index, uint64_t addr, uint64_t value, unsigned size) "cpu %d addr %#"PRIx64" value %#"PRIx64" size %u"
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# net/colo.c
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colo_proxy_main(const char *chr) ": %s"
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# net/colo-compare.c
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colo_compare_main(const char *chr) ": %s"
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### Guest events, keep at bottom
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# @vaddr: Access' virtual address.
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