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265b578c58
A link property can be set during creation, with object_property_add_link() and later with object_property_set_link(). add_link() doesn't add a reference to the target object, while set_link() does. Furthemore, OBJ_PROP_LINK_UNREF_ON_RELEASE flags, set during add_link, says whether a reference must be released when the property is destroyed. This can lead to leaks if the property was later set_link(), as the added reference is never released. Instead, rename OBJ_PROP_LINK_UNREF_ON_RELEASE to OBJ_PROP_LINK_STRONG and use that has an indication on how the link handle reference management in set_link(). Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-id: 20180531195119.22021-3-marcandre.lureau@redhat.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
1037 lines
32 KiB
C
1037 lines
32 KiB
C
/*
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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 "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/error.h"
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#include "net/net.h"
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#include "net/eth.h"
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#include "qom/object_interfaces.h"
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#include "qemu/iov.h"
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#include "qom/object.h"
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#include "net/queue.h"
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#include "chardev/char-fe.h"
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#include "qemu/sockets.h"
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#include "colo.h"
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#include "sysemu/iothread.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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#define MAX_QUEUE_SIZE 1024
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#define COLO_COMPARE_FREE_PRIMARY 0x01
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#define COLO_COMPARE_FREE_SECONDARY 0x02
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/* TODO: Should be configurable */
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#define REGULAR_PACKET_CHECK_MS 3000
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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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char *pri_indev;
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char *sec_indev;
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char *outdev;
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CharBackend chr_pri_in;
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CharBackend chr_sec_in;
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CharBackend chr_out;
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SocketReadState pri_rs;
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SocketReadState sec_rs;
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bool vnet_hdr;
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/*
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* Record the connection that through the NIC
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* Element type: Connection
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*/
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GQueue conn_list;
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/* Record the connection without repetition */
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GHashTable *connection_track_table;
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IOThread *iothread;
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GMainContext *worker_context;
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QEMUTimer *packet_check_timer;
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} CompareState;
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typedef struct CompareClass {
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ObjectClass parent_class;
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} CompareClass;
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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(CompareState *s,
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const uint8_t *buf,
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uint32_t size,
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uint32_t vnet_hdr_len);
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static gint seq_sorter(Packet *a, Packet *b, gpointer data)
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{
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struct tcphdr *atcp, *btcp;
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atcp = (struct tcphdr *)(a->transport_header);
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btcp = (struct tcphdr *)(b->transport_header);
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return ntohl(atcp->th_seq) - ntohl(btcp->th_seq);
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}
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static void fill_pkt_tcp_info(void *data, uint32_t *max_ack)
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{
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Packet *pkt = data;
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struct tcphdr *tcphd;
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tcphd = (struct tcphdr *)pkt->transport_header;
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pkt->tcp_seq = ntohl(tcphd->th_seq);
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pkt->tcp_ack = ntohl(tcphd->th_ack);
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*max_ack = *max_ack > pkt->tcp_ack ? *max_ack : pkt->tcp_ack;
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pkt->header_size = pkt->transport_header - (uint8_t *)pkt->data
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+ (tcphd->th_off << 2) - pkt->vnet_hdr_len;
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pkt->payload_size = pkt->size - pkt->header_size;
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pkt->seq_end = pkt->tcp_seq + pkt->payload_size;
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pkt->flags = tcphd->th_flags;
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}
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/*
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* Return 1 on success, if return 0 means the
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* packet will be dropped
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*/
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static int colo_insert_packet(GQueue *queue, Packet *pkt, uint32_t *max_ack)
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{
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if (g_queue_get_length(queue) <= MAX_QUEUE_SIZE) {
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if (pkt->ip->ip_p == IPPROTO_TCP) {
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fill_pkt_tcp_info(pkt, max_ack);
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g_queue_insert_sorted(queue,
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pkt,
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(GCompareDataFunc)seq_sorter,
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NULL);
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} else {
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g_queue_push_tail(queue, pkt);
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}
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return 1;
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}
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return 0;
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}
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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, Connection **con)
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{
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ConnectionKey key;
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Packet *pkt = NULL;
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Connection *conn;
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if (mode == PRIMARY_IN) {
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pkt = packet_new(s->pri_rs.buf,
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s->pri_rs.packet_len,
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s->pri_rs.vnet_hdr_len);
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} else {
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pkt = packet_new(s->sec_rs.buf,
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s->sec_rs.packet_len,
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s->sec_rs.vnet_hdr_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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fill_connection_key(pkt, &key);
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conn = connection_get(s->connection_track_table,
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&key,
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&s->conn_list);
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if (!conn->processing) {
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g_queue_push_tail(&s->conn_list, conn);
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conn->processing = true;
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}
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if (mode == PRIMARY_IN) {
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if (!colo_insert_packet(&conn->primary_list, pkt, &conn->pack)) {
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error_report("colo compare primary queue size too big,"
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"drop packet");
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}
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} else {
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if (!colo_insert_packet(&conn->secondary_list, pkt, &conn->sack)) {
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error_report("colo compare secondary queue size too big,"
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"drop packet");
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}
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}
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*con = conn;
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return 0;
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}
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static inline bool after(uint32_t seq1, uint32_t seq2)
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{
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return (int32_t)(seq1 - seq2) > 0;
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}
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static void colo_release_primary_pkt(CompareState *s, Packet *pkt)
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{
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int ret;
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ret = compare_chr_send(s,
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pkt->data,
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pkt->size,
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pkt->vnet_hdr_len);
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if (ret < 0) {
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error_report("colo send primary packet failed");
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}
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trace_colo_compare_main("packet same and release packet");
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packet_destroy(pkt, NULL);
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}
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/*
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* The IP packets sent by primary and secondary
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* will be compared in here
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* TODO support ip fragment, Out-Of-Order
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* return: 0 means packet same
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* > 0 || < 0 means packet different
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*/
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static int colo_compare_packet_payload(Packet *ppkt,
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Packet *spkt,
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uint16_t poffset,
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uint16_t soffset,
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uint16_t len)
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{
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if (trace_event_get_state_backends(TRACE_COLO_COMPARE_MISCOMPARE)) {
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char pri_ip_src[20], pri_ip_dst[20], sec_ip_src[20], sec_ip_dst[20];
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strcpy(pri_ip_src, inet_ntoa(ppkt->ip->ip_src));
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strcpy(pri_ip_dst, inet_ntoa(ppkt->ip->ip_dst));
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strcpy(sec_ip_src, inet_ntoa(spkt->ip->ip_src));
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strcpy(sec_ip_dst, inet_ntoa(spkt->ip->ip_dst));
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trace_colo_compare_ip_info(ppkt->size, pri_ip_src,
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pri_ip_dst, spkt->size,
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sec_ip_src, sec_ip_dst);
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}
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return memcmp(ppkt->data + poffset, spkt->data + soffset, len);
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}
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/*
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* return true means that the payload is consist and
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* need to make the next comparison, false means do
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* the checkpoint
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*/
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static bool colo_mark_tcp_pkt(Packet *ppkt, Packet *spkt,
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int8_t *mark, uint32_t max_ack)
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{
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*mark = 0;
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if (ppkt->tcp_seq == spkt->tcp_seq && ppkt->seq_end == spkt->seq_end) {
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if (colo_compare_packet_payload(ppkt, spkt,
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ppkt->header_size, spkt->header_size,
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ppkt->payload_size)) {
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*mark = COLO_COMPARE_FREE_SECONDARY | COLO_COMPARE_FREE_PRIMARY;
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return true;
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}
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}
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if (ppkt->tcp_seq == spkt->tcp_seq && ppkt->seq_end == spkt->seq_end) {
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if (colo_compare_packet_payload(ppkt, spkt,
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ppkt->header_size, spkt->header_size,
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ppkt->payload_size)) {
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*mark = COLO_COMPARE_FREE_SECONDARY | COLO_COMPARE_FREE_PRIMARY;
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return true;
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}
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}
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/* one part of secondary packet payload still need to be compared */
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if (!after(ppkt->seq_end, spkt->seq_end)) {
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if (colo_compare_packet_payload(ppkt, spkt,
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ppkt->header_size + ppkt->offset,
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spkt->header_size + spkt->offset,
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ppkt->payload_size - ppkt->offset)) {
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if (!after(ppkt->tcp_ack, max_ack)) {
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*mark = COLO_COMPARE_FREE_PRIMARY;
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spkt->offset += ppkt->payload_size - ppkt->offset;
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return true;
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} else {
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/* secondary guest hasn't ack the data, don't send
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* out this packet
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*/
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return false;
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}
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}
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} else {
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/* primary packet is longer than secondary packet, compare
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* the same part and mark the primary packet offset
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*/
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if (colo_compare_packet_payload(ppkt, spkt,
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ppkt->header_size + ppkt->offset,
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spkt->header_size + spkt->offset,
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spkt->payload_size - spkt->offset)) {
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*mark = COLO_COMPARE_FREE_SECONDARY;
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ppkt->offset += spkt->payload_size - spkt->offset;
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return true;
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}
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}
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return false;
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}
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static void colo_compare_tcp(CompareState *s, Connection *conn)
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{
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Packet *ppkt = NULL, *spkt = NULL;
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int8_t mark;
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/*
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* If ppkt and spkt have the same payload, but ppkt's ACK
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* is greater than spkt's ACK, in this case we can not
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* send the ppkt because it will cause the secondary guest
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* to miss sending some data in the next. Therefore, we
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* record the maximum ACK in the current queue at both
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* primary side and secondary side. Only when the ack is
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* less than the smaller of the two maximum ack, then we
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* can ensure that the packet's payload is acknowledged by
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* primary and secondary.
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*/
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uint32_t min_ack = conn->pack > conn->sack ? conn->sack : conn->pack;
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pri:
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if (g_queue_is_empty(&conn->primary_list)) {
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return;
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}
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ppkt = g_queue_pop_head(&conn->primary_list);
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sec:
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if (g_queue_is_empty(&conn->secondary_list)) {
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g_queue_push_head(&conn->primary_list, ppkt);
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return;
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}
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spkt = g_queue_pop_head(&conn->secondary_list);
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if (ppkt->tcp_seq == ppkt->seq_end) {
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colo_release_primary_pkt(s, ppkt);
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ppkt = NULL;
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}
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if (ppkt && conn->compare_seq && !after(ppkt->seq_end, conn->compare_seq)) {
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trace_colo_compare_main("pri: this packet has compared");
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colo_release_primary_pkt(s, ppkt);
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ppkt = NULL;
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}
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if (spkt->tcp_seq == spkt->seq_end) {
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packet_destroy(spkt, NULL);
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if (!ppkt) {
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goto pri;
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} else {
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goto sec;
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}
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} else {
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if (conn->compare_seq && !after(spkt->seq_end, conn->compare_seq)) {
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trace_colo_compare_main("sec: this packet has compared");
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packet_destroy(spkt, NULL);
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if (!ppkt) {
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goto pri;
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} else {
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goto sec;
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}
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}
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if (!ppkt) {
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g_queue_push_head(&conn->secondary_list, spkt);
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goto pri;
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}
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}
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if (colo_mark_tcp_pkt(ppkt, spkt, &mark, min_ack)) {
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trace_colo_compare_tcp_info("pri",
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ppkt->tcp_seq, ppkt->tcp_ack,
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ppkt->header_size, ppkt->payload_size,
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ppkt->offset, ppkt->flags);
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trace_colo_compare_tcp_info("sec",
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spkt->tcp_seq, spkt->tcp_ack,
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spkt->header_size, spkt->payload_size,
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spkt->offset, spkt->flags);
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if (mark == COLO_COMPARE_FREE_PRIMARY) {
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conn->compare_seq = ppkt->seq_end;
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colo_release_primary_pkt(s, ppkt);
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g_queue_push_head(&conn->secondary_list, spkt);
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goto pri;
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}
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if (mark == COLO_COMPARE_FREE_SECONDARY) {
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conn->compare_seq = spkt->seq_end;
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packet_destroy(spkt, NULL);
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goto sec;
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}
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if (mark == (COLO_COMPARE_FREE_PRIMARY | COLO_COMPARE_FREE_SECONDARY)) {
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conn->compare_seq = ppkt->seq_end;
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colo_release_primary_pkt(s, ppkt);
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packet_destroy(spkt, NULL);
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goto pri;
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}
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} else {
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g_queue_push_head(&conn->primary_list, ppkt);
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g_queue_push_head(&conn->secondary_list, spkt);
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qemu_hexdump((char *)ppkt->data, stderr,
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"colo-compare ppkt", ppkt->size);
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qemu_hexdump((char *)spkt->data, stderr,
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"colo-compare spkt", spkt->size);
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|
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/*
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* colo_compare_inconsistent_notify();
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* TODO: notice to checkpoint();
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*/
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}
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}
|
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|
|
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/*
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* Called from the compare thread on the primary
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* for compare udp packet
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*/
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static int colo_packet_compare_udp(Packet *spkt, Packet *ppkt)
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{
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uint16_t network_header_length = ppkt->ip->ip_hl << 2;
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uint16_t offset = network_header_length + ETH_HLEN + ppkt->vnet_hdr_len;
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|
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trace_colo_compare_main("compare udp");
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|
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/*
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* Because of ppkt and spkt are both in the same connection,
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* The ppkt's src ip, dst ip, src port, dst port, ip_proto all are
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* same with spkt. In addition, IP header's Identification is a random
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* field, we can handle it in IP fragmentation function later.
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* COLO just concern the response net packet payload from primary guest
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* and secondary guest are same or not, So we ignored all IP header include
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* other field like TOS,TTL,IP Checksum. we only need to compare
|
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* the ip payload here.
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*/
|
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if (ppkt->size != spkt->size) {
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trace_colo_compare_main("UDP: payload size of packets are different");
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return -1;
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}
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if (colo_compare_packet_payload(ppkt, spkt, offset, offset,
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ppkt->size - offset)) {
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trace_colo_compare_udp_miscompare("primary pkt size", ppkt->size);
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trace_colo_compare_udp_miscompare("Secondary pkt size", spkt->size);
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if (trace_event_get_state_backends(TRACE_COLO_COMPARE_MISCOMPARE)) {
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qemu_hexdump((char *)ppkt->data, stderr, "colo-compare pri pkt",
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ppkt->size);
|
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qemu_hexdump((char *)spkt->data, stderr, "colo-compare sec pkt",
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spkt->size);
|
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}
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return -1;
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} else {
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return 0;
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}
|
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}
|
|
|
|
/*
|
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* Called from the compare thread on the primary
|
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* for compare icmp packet
|
|
*/
|
|
static int colo_packet_compare_icmp(Packet *spkt, Packet *ppkt)
|
|
{
|
|
uint16_t network_header_length = ppkt->ip->ip_hl << 2;
|
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uint16_t offset = network_header_length + ETH_HLEN + ppkt->vnet_hdr_len;
|
|
|
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trace_colo_compare_main("compare icmp");
|
|
|
|
/*
|
|
* Because of ppkt and spkt are both in the same connection,
|
|
* The ppkt's src ip, dst ip, src port, dst port, ip_proto all are
|
|
* same with spkt. In addition, IP header's Identification is a random
|
|
* field, we can handle it in IP fragmentation function later.
|
|
* COLO just concern the response net packet payload from primary guest
|
|
* and secondary guest are same or not, So we ignored all IP header include
|
|
* other field like TOS,TTL,IP Checksum. we only need to compare
|
|
* the ip payload here.
|
|
*/
|
|
if (ppkt->size != spkt->size) {
|
|
trace_colo_compare_main("ICMP: payload size of packets are different");
|
|
return -1;
|
|
}
|
|
if (colo_compare_packet_payload(ppkt, spkt, offset, offset,
|
|
ppkt->size - offset)) {
|
|
trace_colo_compare_icmp_miscompare("primary pkt size",
|
|
ppkt->size);
|
|
trace_colo_compare_icmp_miscompare("Secondary pkt size",
|
|
spkt->size);
|
|
if (trace_event_get_state_backends(TRACE_COLO_COMPARE_MISCOMPARE)) {
|
|
qemu_hexdump((char *)ppkt->data, stderr, "colo-compare pri pkt",
|
|
ppkt->size);
|
|
qemu_hexdump((char *)spkt->data, stderr, "colo-compare sec pkt",
|
|
spkt->size);
|
|
}
|
|
return -1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Called from the compare thread on the primary
|
|
* for compare other packet
|
|
*/
|
|
static int colo_packet_compare_other(Packet *spkt, Packet *ppkt)
|
|
{
|
|
uint16_t offset = ppkt->vnet_hdr_len;
|
|
|
|
trace_colo_compare_main("compare other");
|
|
if (trace_event_get_state_backends(TRACE_COLO_COMPARE_MISCOMPARE)) {
|
|
char pri_ip_src[20], pri_ip_dst[20], sec_ip_src[20], sec_ip_dst[20];
|
|
|
|
strcpy(pri_ip_src, inet_ntoa(ppkt->ip->ip_src));
|
|
strcpy(pri_ip_dst, inet_ntoa(ppkt->ip->ip_dst));
|
|
strcpy(sec_ip_src, inet_ntoa(spkt->ip->ip_src));
|
|
strcpy(sec_ip_dst, inet_ntoa(spkt->ip->ip_dst));
|
|
|
|
trace_colo_compare_ip_info(ppkt->size, pri_ip_src,
|
|
pri_ip_dst, spkt->size,
|
|
sec_ip_src, sec_ip_dst);
|
|
}
|
|
|
|
if (ppkt->size != spkt->size) {
|
|
trace_colo_compare_main("Other: payload size of packets are different");
|
|
return -1;
|
|
}
|
|
return colo_compare_packet_payload(ppkt, spkt, offset, offset,
|
|
ppkt->size - offset);
|
|
}
|
|
|
|
static int colo_old_packet_check_one(Packet *pkt, int64_t *check_time)
|
|
{
|
|
int64_t now = qemu_clock_get_ms(QEMU_CLOCK_HOST);
|
|
|
|
if ((now - pkt->creation_ms) > (*check_time)) {
|
|
trace_colo_old_packet_check_found(pkt->creation_ms);
|
|
return 0;
|
|
} else {
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
static int colo_old_packet_check_one_conn(Connection *conn,
|
|
void *user_data)
|
|
{
|
|
GList *result = NULL;
|
|
int64_t check_time = REGULAR_PACKET_CHECK_MS;
|
|
|
|
result = g_queue_find_custom(&conn->primary_list,
|
|
&check_time,
|
|
(GCompareFunc)colo_old_packet_check_one);
|
|
|
|
if (result) {
|
|
/* Do checkpoint will flush old packet */
|
|
/*
|
|
* TODO: Notify colo frame to do checkpoint.
|
|
* colo_compare_inconsistent_notify();
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Look for old packets that the secondary hasn't matched,
|
|
* if we have some then we have to checkpoint to wake
|
|
* the secondary up.
|
|
*/
|
|
static void colo_old_packet_check(void *opaque)
|
|
{
|
|
CompareState *s = opaque;
|
|
|
|
/*
|
|
* If we find one old packet, stop finding job and notify
|
|
* COLO frame do checkpoint.
|
|
*/
|
|
g_queue_find_custom(&s->conn_list, NULL,
|
|
(GCompareFunc)colo_old_packet_check_one_conn);
|
|
}
|
|
|
|
static void colo_compare_packet(CompareState *s, Connection *conn,
|
|
int (*HandlePacket)(Packet *spkt,
|
|
Packet *ppkt))
|
|
{
|
|
Packet *pkt = NULL;
|
|
GList *result = NULL;
|
|
|
|
while (!g_queue_is_empty(&conn->primary_list) &&
|
|
!g_queue_is_empty(&conn->secondary_list)) {
|
|
pkt = g_queue_pop_head(&conn->primary_list);
|
|
result = g_queue_find_custom(&conn->secondary_list,
|
|
pkt, (GCompareFunc)HandlePacket);
|
|
|
|
if (result) {
|
|
colo_release_primary_pkt(s, pkt);
|
|
g_queue_remove(&conn->secondary_list, result->data);
|
|
} else {
|
|
/*
|
|
* If one packet arrive late, the secondary_list or
|
|
* primary_list will be empty, so we can't compare it
|
|
* until next comparison.
|
|
*/
|
|
trace_colo_compare_main("packet different");
|
|
g_queue_push_head(&conn->primary_list, pkt);
|
|
/* TODO: colo_notify_checkpoint();*/
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Called from the compare thread on the primary
|
|
* for compare packet with secondary list of the
|
|
* specified connection when a new packet was
|
|
* queued to it.
|
|
*/
|
|
static void colo_compare_connection(void *opaque, void *user_data)
|
|
{
|
|
CompareState *s = user_data;
|
|
Connection *conn = opaque;
|
|
|
|
switch (conn->ip_proto) {
|
|
case IPPROTO_TCP:
|
|
colo_compare_tcp(s, conn);
|
|
break;
|
|
case IPPROTO_UDP:
|
|
colo_compare_packet(s, conn, colo_packet_compare_udp);
|
|
break;
|
|
case IPPROTO_ICMP:
|
|
colo_compare_packet(s, conn, colo_packet_compare_icmp);
|
|
break;
|
|
default:
|
|
colo_compare_packet(s, conn, colo_packet_compare_other);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int compare_chr_send(CompareState *s,
|
|
const uint8_t *buf,
|
|
uint32_t size,
|
|
uint32_t vnet_hdr_len)
|
|
{
|
|
int ret = 0;
|
|
uint32_t len = htonl(size);
|
|
|
|
if (!size) {
|
|
return 0;
|
|
}
|
|
|
|
ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)&len, sizeof(len));
|
|
if (ret != sizeof(len)) {
|
|
goto err;
|
|
}
|
|
|
|
if (s->vnet_hdr) {
|
|
/*
|
|
* We send vnet header len make other module(like filter-redirector)
|
|
* know how to parse net packet correctly.
|
|
*/
|
|
len = htonl(vnet_hdr_len);
|
|
ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)&len, sizeof(len));
|
|
if (ret != sizeof(len)) {
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)buf, size);
|
|
if (ret != size) {
|
|
goto err;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
return ret < 0 ? ret : -EIO;
|
|
}
|
|
|
|
static int compare_chr_can_read(void *opaque)
|
|
{
|
|
return COMPARE_READ_LEN_MAX;
|
|
}
|
|
|
|
/*
|
|
* Called from the main thread on the primary for packets
|
|
* arriving over the socket from the primary.
|
|
*/
|
|
static void compare_pri_chr_in(void *opaque, const uint8_t *buf, int size)
|
|
{
|
|
CompareState *s = COLO_COMPARE(opaque);
|
|
int ret;
|
|
|
|
ret = net_fill_rstate(&s->pri_rs, buf, size);
|
|
if (ret == -1) {
|
|
qemu_chr_fe_set_handlers(&s->chr_pri_in, NULL, NULL, NULL, NULL,
|
|
NULL, NULL, true);
|
|
error_report("colo-compare primary_in error");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Called from the main thread on the primary for packets
|
|
* arriving over the socket from the secondary.
|
|
*/
|
|
static void compare_sec_chr_in(void *opaque, const uint8_t *buf, int size)
|
|
{
|
|
CompareState *s = COLO_COMPARE(opaque);
|
|
int ret;
|
|
|
|
ret = net_fill_rstate(&s->sec_rs, buf, size);
|
|
if (ret == -1) {
|
|
qemu_chr_fe_set_handlers(&s->chr_sec_in, NULL, NULL, NULL, NULL,
|
|
NULL, NULL, true);
|
|
error_report("colo-compare secondary_in error");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check old packet regularly so it can watch for any packets
|
|
* that the secondary hasn't produced equivalents of.
|
|
*/
|
|
static void check_old_packet_regular(void *opaque)
|
|
{
|
|
CompareState *s = opaque;
|
|
|
|
/* if have old packet we will notify checkpoint */
|
|
colo_old_packet_check(s);
|
|
timer_mod(s->packet_check_timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
|
|
REGULAR_PACKET_CHECK_MS);
|
|
}
|
|
|
|
static void colo_compare_timer_init(CompareState *s)
|
|
{
|
|
AioContext *ctx = iothread_get_aio_context(s->iothread);
|
|
|
|
s->packet_check_timer = aio_timer_new(ctx, QEMU_CLOCK_VIRTUAL,
|
|
SCALE_MS, check_old_packet_regular,
|
|
s);
|
|
timer_mod(s->packet_check_timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) +
|
|
REGULAR_PACKET_CHECK_MS);
|
|
}
|
|
|
|
static void colo_compare_timer_del(CompareState *s)
|
|
{
|
|
if (s->packet_check_timer) {
|
|
timer_del(s->packet_check_timer);
|
|
timer_free(s->packet_check_timer);
|
|
s->packet_check_timer = NULL;
|
|
}
|
|
}
|
|
|
|
static void colo_compare_iothread(CompareState *s)
|
|
{
|
|
object_ref(OBJECT(s->iothread));
|
|
s->worker_context = iothread_get_g_main_context(s->iothread);
|
|
|
|
qemu_chr_fe_set_handlers(&s->chr_pri_in, compare_chr_can_read,
|
|
compare_pri_chr_in, NULL, NULL,
|
|
s, s->worker_context, true);
|
|
qemu_chr_fe_set_handlers(&s->chr_sec_in, compare_chr_can_read,
|
|
compare_sec_chr_in, NULL, NULL,
|
|
s, s->worker_context, true);
|
|
|
|
colo_compare_timer_init(s);
|
|
}
|
|
|
|
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 bool compare_get_vnet_hdr(Object *obj, Error **errp)
|
|
{
|
|
CompareState *s = COLO_COMPARE(obj);
|
|
|
|
return s->vnet_hdr;
|
|
}
|
|
|
|
static void compare_set_vnet_hdr(Object *obj,
|
|
bool value,
|
|
Error **errp)
|
|
{
|
|
CompareState *s = COLO_COMPARE(obj);
|
|
|
|
s->vnet_hdr = value;
|
|
}
|
|
|
|
static void compare_pri_rs_finalize(SocketReadState *pri_rs)
|
|
{
|
|
CompareState *s = container_of(pri_rs, CompareState, pri_rs);
|
|
Connection *conn = NULL;
|
|
|
|
if (packet_enqueue(s, PRIMARY_IN, &conn)) {
|
|
trace_colo_compare_main("primary: unsupported packet in");
|
|
compare_chr_send(s,
|
|
pri_rs->buf,
|
|
pri_rs->packet_len,
|
|
pri_rs->vnet_hdr_len);
|
|
} else {
|
|
/* compare packet in the specified connection */
|
|
colo_compare_connection(conn, s);
|
|
}
|
|
}
|
|
|
|
static void compare_sec_rs_finalize(SocketReadState *sec_rs)
|
|
{
|
|
CompareState *s = container_of(sec_rs, CompareState, sec_rs);
|
|
Connection *conn = NULL;
|
|
|
|
if (packet_enqueue(s, SECONDARY_IN, &conn)) {
|
|
trace_colo_compare_main("secondary: unsupported packet in");
|
|
} else {
|
|
/* compare packet in the specified connection */
|
|
colo_compare_connection(conn, s);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Return 0 is success.
|
|
* Return 1 is failed.
|
|
*/
|
|
static int find_and_check_chardev(Chardev **chr,
|
|
char *chr_name,
|
|
Error **errp)
|
|
{
|
|
*chr = qemu_chr_find(chr_name);
|
|
if (*chr == NULL) {
|
|
error_setg(errp, "Device '%s' not found",
|
|
chr_name);
|
|
return 1;
|
|
}
|
|
|
|
if (!qemu_chr_has_feature(*chr, QEMU_CHAR_FEATURE_RECONNECTABLE)) {
|
|
error_setg(errp, "chardev \"%s\" is not reconnectable",
|
|
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);
|
|
Chardev *chr;
|
|
|
|
if (!s->pri_indev || !s->sec_indev || !s->outdev || !s->iothread) {
|
|
error_setg(errp, "colo compare needs 'primary_in' ,"
|
|
"'secondary_in','outdev','iothread' 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(&chr, s->pri_indev, errp) ||
|
|
!qemu_chr_fe_init(&s->chr_pri_in, chr, errp)) {
|
|
return;
|
|
}
|
|
|
|
if (find_and_check_chardev(&chr, s->sec_indev, errp) ||
|
|
!qemu_chr_fe_init(&s->chr_sec_in, chr, errp)) {
|
|
return;
|
|
}
|
|
|
|
if (find_and_check_chardev(&chr, s->outdev, errp) ||
|
|
!qemu_chr_fe_init(&s->chr_out, chr, errp)) {
|
|
return;
|
|
}
|
|
|
|
net_socket_rs_init(&s->pri_rs, compare_pri_rs_finalize, s->vnet_hdr);
|
|
net_socket_rs_init(&s->sec_rs, compare_sec_rs_finalize, s->vnet_hdr);
|
|
|
|
g_queue_init(&s->conn_list);
|
|
|
|
s->connection_track_table = g_hash_table_new_full(connection_key_hash,
|
|
connection_key_equal,
|
|
g_free,
|
|
connection_destroy);
|
|
|
|
colo_compare_iothread(s);
|
|
return;
|
|
}
|
|
|
|
static void colo_flush_packets(void *opaque, void *user_data)
|
|
{
|
|
CompareState *s = user_data;
|
|
Connection *conn = opaque;
|
|
Packet *pkt = NULL;
|
|
|
|
while (!g_queue_is_empty(&conn->primary_list)) {
|
|
pkt = g_queue_pop_head(&conn->primary_list);
|
|
compare_chr_send(s,
|
|
pkt->data,
|
|
pkt->size,
|
|
pkt->vnet_hdr_len);
|
|
packet_destroy(pkt, NULL);
|
|
}
|
|
while (!g_queue_is_empty(&conn->secondary_list)) {
|
|
pkt = g_queue_pop_head(&conn->secondary_list);
|
|
packet_destroy(pkt, NULL);
|
|
}
|
|
}
|
|
|
|
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)
|
|
{
|
|
CompareState *s = COLO_COMPARE(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);
|
|
object_property_add_link(obj, "iothread", TYPE_IOTHREAD,
|
|
(Object **)&s->iothread,
|
|
object_property_allow_set_link,
|
|
OBJ_PROP_LINK_STRONG, NULL);
|
|
|
|
s->vnet_hdr = false;
|
|
object_property_add_bool(obj, "vnet_hdr_support", compare_get_vnet_hdr,
|
|
compare_set_vnet_hdr, NULL);
|
|
}
|
|
|
|
static void colo_compare_finalize(Object *obj)
|
|
{
|
|
CompareState *s = COLO_COMPARE(obj);
|
|
|
|
qemu_chr_fe_deinit(&s->chr_pri_in, false);
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|
qemu_chr_fe_deinit(&s->chr_sec_in, false);
|
|
qemu_chr_fe_deinit(&s->chr_out, false);
|
|
if (s->iothread) {
|
|
colo_compare_timer_del(s);
|
|
}
|
|
/* Release all unhandled packets after compare thead exited */
|
|
g_queue_foreach(&s->conn_list, colo_flush_packets, s);
|
|
|
|
g_queue_clear(&s->conn_list);
|
|
|
|
if (s->connection_track_table) {
|
|
g_hash_table_destroy(s->connection_track_table);
|
|
}
|
|
|
|
if (s->iothread) {
|
|
object_unref(OBJECT(s->iothread));
|
|
}
|
|
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);
|