applied using ./scripts/clean-includes Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Ben Warren <ben@skyportsystems.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
932 lines
29 KiB
C
932 lines
29 KiB
C
/*
|
|
* 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 "trace.h"
|
|
#include "qemu-common.h"
|
|
#include "qapi/qmp/qerror.h"
|
|
#include "qapi/error.h"
|
|
#include "net/net.h"
|
|
#include "net/eth.h"
|
|
#include "qom/object_interfaces.h"
|
|
#include "qemu/iov.h"
|
|
#include "qom/object.h"
|
|
#include "net/queue.h"
|
|
#include "chardev/char-fe.h"
|
|
#include "qemu/sockets.h"
|
|
#include "qapi-visit.h"
|
|
#include "net/colo.h"
|
|
#include "sysemu/iothread.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
|
|
#define MAX_QUEUE_SIZE 1024
|
|
|
|
/* TODO: Should be configurable */
|
|
#define REGULAR_PACKET_CHECK_MS 3000
|
|
|
|
/*
|
|
* + CompareState ++
|
|
* | |
|
|
* +---------------+ +---------------+ +---------------+
|
|
* | conn list + - > conn + ------- > conn + -- > ......
|
|
* +---------------+ +---------------+ +---------------+
|
|
* | | | | | |
|
|
* +---------------+ +---v----+ +---v----+ +---v----+ +---v----+
|
|
* |primary | |secondary |primary | |secondary
|
|
* |packet | |packet + |packet | |packet +
|
|
* +--------+ +--------+ +--------+ +--------+
|
|
* | | | |
|
|
* +---v----+ +---v----+ +---v----+ +---v----+
|
|
* |primary | |secondary |primary | |secondary
|
|
* |packet | |packet + |packet | |packet +
|
|
* +--------+ +--------+ +--------+ +--------+
|
|
* | | | |
|
|
* +---v----+ +---v----+ +---v----+ +---v----+
|
|
* |primary | |secondary |primary | |secondary
|
|
* |packet | |packet + |packet | |packet +
|
|
* +--------+ +--------+ +--------+ +--------+
|
|
*/
|
|
typedef struct CompareState {
|
|
Object parent;
|
|
|
|
char *pri_indev;
|
|
char *sec_indev;
|
|
char *outdev;
|
|
CharBackend chr_pri_in;
|
|
CharBackend chr_sec_in;
|
|
CharBackend chr_out;
|
|
SocketReadState pri_rs;
|
|
SocketReadState sec_rs;
|
|
bool vnet_hdr;
|
|
|
|
/*
|
|
* Record the connection that through the NIC
|
|
* Element type: Connection
|
|
*/
|
|
GQueue conn_list;
|
|
/* Record the connection without repetition */
|
|
GHashTable *connection_track_table;
|
|
|
|
IOThread *iothread;
|
|
GMainContext *worker_context;
|
|
QEMUTimer *packet_check_timer;
|
|
} CompareState;
|
|
|
|
typedef struct CompareClass {
|
|
ObjectClass parent_class;
|
|
} CompareClass;
|
|
|
|
enum {
|
|
PRIMARY_IN = 0,
|
|
SECONDARY_IN,
|
|
};
|
|
|
|
static int compare_chr_send(CompareState *s,
|
|
const uint8_t *buf,
|
|
uint32_t size,
|
|
uint32_t vnet_hdr_len);
|
|
|
|
static gint seq_sorter(Packet *a, Packet *b, gpointer data)
|
|
{
|
|
struct tcphdr *atcp, *btcp;
|
|
|
|
atcp = (struct tcphdr *)(a->transport_header);
|
|
btcp = (struct tcphdr *)(b->transport_header);
|
|
return ntohl(atcp->th_seq) - ntohl(btcp->th_seq);
|
|
}
|
|
|
|
/*
|
|
* Return 1 on success, if return 0 means the
|
|
* packet will be dropped
|
|
*/
|
|
static int colo_insert_packet(GQueue *queue, Packet *pkt)
|
|
{
|
|
if (g_queue_get_length(queue) <= MAX_QUEUE_SIZE) {
|
|
if (pkt->ip->ip_p == IPPROTO_TCP) {
|
|
g_queue_insert_sorted(queue,
|
|
pkt,
|
|
(GCompareDataFunc)seq_sorter,
|
|
NULL);
|
|
} else {
|
|
g_queue_push_tail(queue, pkt);
|
|
}
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Return 0 on success, if return -1 means the pkt
|
|
* is unsupported(arp and ipv6) and will be sent later
|
|
*/
|
|
static int packet_enqueue(CompareState *s, int mode, Connection **con)
|
|
{
|
|
ConnectionKey key;
|
|
Packet *pkt = NULL;
|
|
Connection *conn;
|
|
|
|
if (mode == PRIMARY_IN) {
|
|
pkt = packet_new(s->pri_rs.buf,
|
|
s->pri_rs.packet_len,
|
|
s->pri_rs.vnet_hdr_len);
|
|
} else {
|
|
pkt = packet_new(s->sec_rs.buf,
|
|
s->sec_rs.packet_len,
|
|
s->sec_rs.vnet_hdr_len);
|
|
}
|
|
|
|
if (parse_packet_early(pkt)) {
|
|
packet_destroy(pkt, NULL);
|
|
pkt = NULL;
|
|
return -1;
|
|
}
|
|
fill_connection_key(pkt, &key);
|
|
|
|
conn = connection_get(s->connection_track_table,
|
|
&key,
|
|
&s->conn_list);
|
|
|
|
if (!conn->processing) {
|
|
g_queue_push_tail(&s->conn_list, conn);
|
|
conn->processing = true;
|
|
}
|
|
|
|
if (mode == PRIMARY_IN) {
|
|
if (!colo_insert_packet(&conn->primary_list, pkt)) {
|
|
error_report("colo compare primary queue size too big,"
|
|
"drop packet");
|
|
}
|
|
} else {
|
|
if (!colo_insert_packet(&conn->secondary_list, pkt)) {
|
|
error_report("colo compare secondary queue size too big,"
|
|
"drop packet");
|
|
}
|
|
}
|
|
*con = conn;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* The IP packets sent by primary and secondary
|
|
* will be compared in here
|
|
* TODO support ip fragment, Out-Of-Order
|
|
* return: 0 means packet same
|
|
* > 0 || < 0 means packet different
|
|
*/
|
|
static int colo_packet_compare_common(Packet *ppkt,
|
|
Packet *spkt,
|
|
int poffset,
|
|
int soffset)
|
|
{
|
|
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);
|
|
}
|
|
|
|
poffset = ppkt->vnet_hdr_len + poffset;
|
|
soffset = ppkt->vnet_hdr_len + soffset;
|
|
|
|
if (ppkt->size - poffset == spkt->size - soffset) {
|
|
return memcmp(ppkt->data + poffset,
|
|
spkt->data + soffset,
|
|
spkt->size - soffset);
|
|
} else {
|
|
trace_colo_compare_main("Net packet size are not the same");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Called from the compare thread on the primary
|
|
* for compare tcp packet
|
|
* compare_tcp copied from Dr. David Alan Gilbert's branch
|
|
*/
|
|
static int colo_packet_compare_tcp(Packet *spkt, Packet *ppkt)
|
|
{
|
|
struct tcphdr *ptcp, *stcp;
|
|
int res;
|
|
|
|
trace_colo_compare_main("compare tcp");
|
|
|
|
ptcp = (struct tcphdr *)ppkt->transport_header;
|
|
stcp = (struct tcphdr *)spkt->transport_header;
|
|
|
|
/*
|
|
* The 'identification' field in the IP header is *very* random
|
|
* it almost never matches. Fudge this by ignoring differences in
|
|
* unfragmented packets; they'll normally sort themselves out if different
|
|
* anyway, and it should recover at the TCP level.
|
|
* An alternative would be to get both the primary and secondary to rewrite
|
|
* somehow; but that would need some sync traffic to sync the state
|
|
*/
|
|
if (ntohs(ppkt->ip->ip_off) & IP_DF) {
|
|
spkt->ip->ip_id = ppkt->ip->ip_id;
|
|
/* and the sum will be different if the IDs were different */
|
|
spkt->ip->ip_sum = ppkt->ip->ip_sum;
|
|
}
|
|
|
|
/*
|
|
* Check tcp header length for tcp option field.
|
|
* th_off > 5 means this tcp packet have options field.
|
|
* The tcp options maybe always different.
|
|
* for example:
|
|
* From RFC 7323.
|
|
* TCP Timestamps option (TSopt):
|
|
* Kind: 8
|
|
*
|
|
* Length: 10 bytes
|
|
*
|
|
* +-------+-------+---------------------+---------------------+
|
|
* |Kind=8 | 10 | TS Value (TSval) |TS Echo Reply (TSecr)|
|
|
* +-------+-------+---------------------+---------------------+
|
|
* 1 1 4 4
|
|
*
|
|
* In this case the primary guest's timestamp always different with
|
|
* the secondary guest's timestamp. COLO just focus on payload,
|
|
* so we just need skip this field.
|
|
*/
|
|
if (ptcp->th_off > 5) {
|
|
ptrdiff_t ptcp_offset, stcp_offset;
|
|
|
|
ptcp_offset = ppkt->transport_header - (uint8_t *)ppkt->data
|
|
+ (ptcp->th_off * 4) - ppkt->vnet_hdr_len;
|
|
stcp_offset = spkt->transport_header - (uint8_t *)spkt->data
|
|
+ (stcp->th_off * 4) - spkt->vnet_hdr_len;
|
|
|
|
/*
|
|
* When network is busy, some tcp options(like sack) will unpredictable
|
|
* occur in primary side or secondary side. it will make packet size
|
|
* not same, but the two packet's payload is identical. colo just
|
|
* care about packet payload, so we skip the option field.
|
|
*/
|
|
res = colo_packet_compare_common(ppkt, spkt, ptcp_offset, stcp_offset);
|
|
} else if (ptcp->th_sum == stcp->th_sum) {
|
|
res = colo_packet_compare_common(ppkt, spkt, ETH_HLEN, ETH_HLEN);
|
|
} else {
|
|
res = -1;
|
|
}
|
|
|
|
if (res != 0 &&
|
|
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);
|
|
|
|
trace_colo_compare_tcp_info("pri tcp packet",
|
|
ntohl(ptcp->th_seq),
|
|
ntohl(ptcp->th_ack),
|
|
res, ptcp->th_flags,
|
|
ppkt->size);
|
|
|
|
trace_colo_compare_tcp_info("sec tcp packet",
|
|
ntohl(stcp->th_seq),
|
|
ntohl(stcp->th_ack),
|
|
res, stcp->th_flags,
|
|
spkt->size);
|
|
|
|
qemu_hexdump((char *)ppkt->data, stderr,
|
|
"colo-compare ppkt", ppkt->size);
|
|
qemu_hexdump((char *)spkt->data, stderr,
|
|
"colo-compare spkt", spkt->size);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
/*
|
|
* Called from the compare thread on the primary
|
|
* for compare udp packet
|
|
*/
|
|
static int colo_packet_compare_udp(Packet *spkt, Packet *ppkt)
|
|
{
|
|
int ret;
|
|
int network_header_length = ppkt->ip->ip_hl * 4;
|
|
|
|
trace_colo_compare_main("compare udp");
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
ret = colo_packet_compare_common(ppkt, spkt,
|
|
network_header_length + ETH_HLEN,
|
|
network_header_length + ETH_HLEN);
|
|
|
|
if (ret) {
|
|
trace_colo_compare_udp_miscompare("primary pkt size", ppkt->size);
|
|
trace_colo_compare_udp_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 ret;
|
|
}
|
|
|
|
/*
|
|
* Called from the compare thread on the primary
|
|
* for compare icmp packet
|
|
*/
|
|
static int colo_packet_compare_icmp(Packet *spkt, Packet *ppkt)
|
|
{
|
|
int network_header_length = ppkt->ip->ip_hl * 4;
|
|
|
|
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 (colo_packet_compare_common(ppkt, spkt,
|
|
network_header_length + ETH_HLEN,
|
|
network_header_length + ETH_HLEN)) {
|
|
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)
|
|
{
|
|
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);
|
|
}
|
|
|
|
return colo_packet_compare_common(ppkt, spkt, 0, 0);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
Packet *pkt = NULL;
|
|
GList *result = NULL;
|
|
int ret;
|
|
|
|
while (!g_queue_is_empty(&conn->primary_list) &&
|
|
!g_queue_is_empty(&conn->secondary_list)) {
|
|
pkt = g_queue_pop_head(&conn->primary_list);
|
|
switch (conn->ip_proto) {
|
|
case IPPROTO_TCP:
|
|
result = g_queue_find_custom(&conn->secondary_list,
|
|
pkt, (GCompareFunc)colo_packet_compare_tcp);
|
|
break;
|
|
case IPPROTO_UDP:
|
|
result = g_queue_find_custom(&conn->secondary_list,
|
|
pkt, (GCompareFunc)colo_packet_compare_udp);
|
|
break;
|
|
case IPPROTO_ICMP:
|
|
result = g_queue_find_custom(&conn->secondary_list,
|
|
pkt, (GCompareFunc)colo_packet_compare_icmp);
|
|
break;
|
|
default:
|
|
result = g_queue_find_custom(&conn->secondary_list,
|
|
pkt, (GCompareFunc)colo_packet_compare_other);
|
|
break;
|
|
}
|
|
|
|
if (result) {
|
|
ret = compare_chr_send(s,
|
|
pkt->data,
|
|
pkt->size,
|
|
pkt->vnet_hdr_len);
|
|
if (ret < 0) {
|
|
error_report("colo_send_primary_packet failed");
|
|
}
|
|
trace_colo_compare_main("packet same and release packet");
|
|
g_queue_remove(&conn->secondary_list, result->data);
|
|
packet_destroy(pkt, NULL);
|
|
} 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;
|
|
}
|
|
}
|
|
}
|
|
|
|
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_UNREF_ON_RELEASE, 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);
|
|
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);
|