1 /* 2 * COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO) 3 * (a.k.a. Fault Tolerance or Continuous Replication) 4 * 5 * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD. 6 * Copyright (c) 2016 FUJITSU LIMITED 7 * Copyright (c) 2016 Intel Corporation 8 * 9 * Author: Zhang Chen <zhangchen.fnst@cn.fujitsu.com> 10 * 11 * This work is licensed under the terms of the GNU GPL, version 2 or 12 * later. See the COPYING file in the top-level directory. 13 */ 14 15 #include "qemu/osdep.h" 16 #include "qemu/error-report.h" 17 #include "trace.h" 18 #include "qemu-common.h" 19 #include "qapi/qmp/qerror.h" 20 #include "qapi/error.h" 21 #include "net/net.h" 22 #include "net/eth.h" 23 #include "qom/object_interfaces.h" 24 #include "qemu/iov.h" 25 #include "qom/object.h" 26 #include "qemu/typedefs.h" 27 #include "net/queue.h" 28 #include "sysemu/char.h" 29 #include "qemu/sockets.h" 30 #include "qapi-visit.h" 31 #include "net/colo.h" 32 33 #define TYPE_COLO_COMPARE "colo-compare" 34 #define COLO_COMPARE(obj) \ 35 OBJECT_CHECK(CompareState, (obj), TYPE_COLO_COMPARE) 36 37 #define COMPARE_READ_LEN_MAX NET_BUFSIZE 38 #define MAX_QUEUE_SIZE 1024 39 40 /* TODO: Should be configurable */ 41 #define REGULAR_PACKET_CHECK_MS 3000 42 43 /* 44 + CompareState ++ 45 | | 46 +---------------+ +---------------+ +---------------+ 47 |conn list +--->conn +--------->conn | 48 +---------------+ +---------------+ +---------------+ 49 | | | | | | 50 +---------------+ +---v----+ +---v----+ +---v----+ +---v----+ 51 |primary | |secondary |primary | |secondary 52 |packet | |packet + |packet | |packet + 53 +--------+ +--------+ +--------+ +--------+ 54 | | | | 55 +---v----+ +---v----+ +---v----+ +---v----+ 56 |primary | |secondary |primary | |secondary 57 |packet | |packet + |packet | |packet + 58 +--------+ +--------+ +--------+ +--------+ 59 | | | | 60 +---v----+ +---v----+ +---v----+ +---v----+ 61 |primary | |secondary |primary | |secondary 62 |packet | |packet + |packet | |packet + 63 +--------+ +--------+ +--------+ +--------+ 64 */ 65 typedef struct CompareState { 66 Object parent; 67 68 char *pri_indev; 69 char *sec_indev; 70 char *outdev; 71 CharBackend chr_pri_in; 72 CharBackend chr_sec_in; 73 CharBackend chr_out; 74 SocketReadState pri_rs; 75 SocketReadState sec_rs; 76 77 /* connection list: the connections belonged to this NIC could be found 78 * in this list. 79 * element type: Connection 80 */ 81 GQueue conn_list; 82 /* hashtable to save connection */ 83 GHashTable *connection_track_table; 84 /* compare thread, a thread for each NIC */ 85 QemuThread thread; 86 /* Timer used on the primary to find packets that are never matched */ 87 QEMUTimer *timer; 88 QemuMutex timer_check_lock; 89 } CompareState; 90 91 typedef struct CompareClass { 92 ObjectClass parent_class; 93 } CompareClass; 94 95 enum { 96 PRIMARY_IN = 0, 97 SECONDARY_IN, 98 }; 99 100 static int compare_chr_send(CharBackend *out, 101 const uint8_t *buf, 102 uint32_t size); 103 104 static gint seq_sorter(Packet *a, Packet *b, gpointer data) 105 { 106 struct tcphdr *atcp, *btcp; 107 108 atcp = (struct tcphdr *)(a->transport_header); 109 btcp = (struct tcphdr *)(b->transport_header); 110 return ntohl(atcp->th_seq) - ntohl(btcp->th_seq); 111 } 112 113 /* 114 * Return 0 on success, if return -1 means the pkt 115 * is unsupported(arp and ipv6) and will be sent later 116 */ 117 static int packet_enqueue(CompareState *s, int mode) 118 { 119 ConnectionKey key; 120 Packet *pkt = NULL; 121 Connection *conn; 122 123 if (mode == PRIMARY_IN) { 124 pkt = packet_new(s->pri_rs.buf, s->pri_rs.packet_len); 125 } else { 126 pkt = packet_new(s->sec_rs.buf, s->sec_rs.packet_len); 127 } 128 129 if (parse_packet_early(pkt)) { 130 packet_destroy(pkt, NULL); 131 pkt = NULL; 132 return -1; 133 } 134 fill_connection_key(pkt, &key); 135 136 conn = connection_get(s->connection_track_table, 137 &key, 138 &s->conn_list); 139 140 if (!conn->processing) { 141 g_queue_push_tail(&s->conn_list, conn); 142 conn->processing = true; 143 } 144 145 if (mode == PRIMARY_IN) { 146 if (g_queue_get_length(&conn->primary_list) <= 147 MAX_QUEUE_SIZE) { 148 g_queue_push_tail(&conn->primary_list, pkt); 149 if (conn->ip_proto == IPPROTO_TCP) { 150 g_queue_sort(&conn->primary_list, 151 (GCompareDataFunc)seq_sorter, 152 NULL); 153 } 154 } else { 155 error_report("colo compare primary queue size too big," 156 "drop packet"); 157 } 158 } else { 159 if (g_queue_get_length(&conn->secondary_list) <= 160 MAX_QUEUE_SIZE) { 161 g_queue_push_tail(&conn->secondary_list, pkt); 162 if (conn->ip_proto == IPPROTO_TCP) { 163 g_queue_sort(&conn->secondary_list, 164 (GCompareDataFunc)seq_sorter, 165 NULL); 166 } 167 } else { 168 error_report("colo compare secondary queue size too big," 169 "drop packet"); 170 } 171 } 172 173 return 0; 174 } 175 176 /* 177 * The IP packets sent by primary and secondary 178 * will be compared in here 179 * TODO support ip fragment, Out-Of-Order 180 * return: 0 means packet same 181 * > 0 || < 0 means packet different 182 */ 183 static int colo_packet_compare(Packet *ppkt, Packet *spkt) 184 { 185 trace_colo_compare_ip_info(ppkt->size, inet_ntoa(ppkt->ip->ip_src), 186 inet_ntoa(ppkt->ip->ip_dst), spkt->size, 187 inet_ntoa(spkt->ip->ip_src), 188 inet_ntoa(spkt->ip->ip_dst)); 189 190 if (ppkt->size == spkt->size) { 191 return memcmp(ppkt->data, spkt->data, spkt->size); 192 } else { 193 return -1; 194 } 195 } 196 197 /* 198 * Called from the compare thread on the primary 199 * for compare tcp packet 200 * compare_tcp copied from Dr. David Alan Gilbert's branch 201 */ 202 static int colo_packet_compare_tcp(Packet *spkt, Packet *ppkt) 203 { 204 struct tcphdr *ptcp, *stcp; 205 int res; 206 207 trace_colo_compare_main("compare tcp"); 208 if (ppkt->size != spkt->size) { 209 if (trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) { 210 trace_colo_compare_main("pkt size not same"); 211 } 212 return -1; 213 } 214 215 ptcp = (struct tcphdr *)ppkt->transport_header; 216 stcp = (struct tcphdr *)spkt->transport_header; 217 218 /* 219 * The 'identification' field in the IP header is *very* random 220 * it almost never matches. Fudge this by ignoring differences in 221 * unfragmented packets; they'll normally sort themselves out if different 222 * anyway, and it should recover at the TCP level. 223 * An alternative would be to get both the primary and secondary to rewrite 224 * somehow; but that would need some sync traffic to sync the state 225 */ 226 if (ntohs(ppkt->ip->ip_off) & IP_DF) { 227 spkt->ip->ip_id = ppkt->ip->ip_id; 228 /* and the sum will be different if the IDs were different */ 229 spkt->ip->ip_sum = ppkt->ip->ip_sum; 230 } 231 232 res = memcmp(ppkt->data + ETH_HLEN, spkt->data + ETH_HLEN, 233 (spkt->size - ETH_HLEN)); 234 235 if (res != 0 && trace_event_get_state(TRACE_COLO_COMPARE_MISCOMPARE)) { 236 trace_colo_compare_pkt_info_src(inet_ntoa(ppkt->ip->ip_src), 237 ntohl(stcp->th_seq), 238 ntohl(stcp->th_ack), 239 res, stcp->th_flags, 240 spkt->size); 241 242 trace_colo_compare_pkt_info_dst(inet_ntoa(ppkt->ip->ip_dst), 243 ntohl(ptcp->th_seq), 244 ntohl(ptcp->th_ack), 245 res, ptcp->th_flags, 246 ppkt->size); 247 248 qemu_hexdump((char *)ppkt->data, stderr, 249 "colo-compare ppkt", ppkt->size); 250 qemu_hexdump((char *)spkt->data, stderr, 251 "colo-compare spkt", spkt->size); 252 } 253 254 return res; 255 } 256 257 /* 258 * Called from the compare thread on the primary 259 * for compare udp packet 260 */ 261 static int colo_packet_compare_udp(Packet *spkt, Packet *ppkt) 262 { 263 int ret; 264 265 trace_colo_compare_main("compare udp"); 266 ret = colo_packet_compare(ppkt, spkt); 267 268 if (ret) { 269 trace_colo_compare_udp_miscompare("primary pkt size", ppkt->size); 270 qemu_hexdump((char *)ppkt->data, stderr, "colo-compare", ppkt->size); 271 trace_colo_compare_udp_miscompare("Secondary pkt size", spkt->size); 272 qemu_hexdump((char *)spkt->data, stderr, "colo-compare", spkt->size); 273 } 274 275 return ret; 276 } 277 278 /* 279 * Called from the compare thread on the primary 280 * for compare icmp packet 281 */ 282 static int colo_packet_compare_icmp(Packet *spkt, Packet *ppkt) 283 { 284 int network_length; 285 286 trace_colo_compare_main("compare icmp"); 287 network_length = ppkt->ip->ip_hl * 4; 288 if (ppkt->size != spkt->size || 289 ppkt->size < network_length + ETH_HLEN) { 290 return -1; 291 } 292 293 if (colo_packet_compare(ppkt, spkt)) { 294 trace_colo_compare_icmp_miscompare("primary pkt size", 295 ppkt->size); 296 qemu_hexdump((char *)ppkt->data, stderr, "colo-compare", 297 ppkt->size); 298 trace_colo_compare_icmp_miscompare("Secondary pkt size", 299 spkt->size); 300 qemu_hexdump((char *)spkt->data, stderr, "colo-compare", 301 spkt->size); 302 return -1; 303 } else { 304 return 0; 305 } 306 } 307 308 /* 309 * Called from the compare thread on the primary 310 * for compare other packet 311 */ 312 static int colo_packet_compare_other(Packet *spkt, Packet *ppkt) 313 { 314 trace_colo_compare_main("compare other"); 315 trace_colo_compare_ip_info(ppkt->size, inet_ntoa(ppkt->ip->ip_src), 316 inet_ntoa(ppkt->ip->ip_dst), spkt->size, 317 inet_ntoa(spkt->ip->ip_src), 318 inet_ntoa(spkt->ip->ip_dst)); 319 return colo_packet_compare(ppkt, spkt); 320 } 321 322 static int colo_old_packet_check_one(Packet *pkt, int64_t *check_time) 323 { 324 int64_t now = qemu_clock_get_ms(QEMU_CLOCK_HOST); 325 326 if ((now - pkt->creation_ms) > (*check_time)) { 327 trace_colo_old_packet_check_found(pkt->creation_ms); 328 return 0; 329 } else { 330 return 1; 331 } 332 } 333 334 static void colo_old_packet_check_one_conn(void *opaque, 335 void *user_data) 336 { 337 Connection *conn = opaque; 338 GList *result = NULL; 339 int64_t check_time = REGULAR_PACKET_CHECK_MS; 340 341 result = g_queue_find_custom(&conn->primary_list, 342 &check_time, 343 (GCompareFunc)colo_old_packet_check_one); 344 345 if (result) { 346 /* do checkpoint will flush old packet */ 347 /* TODO: colo_notify_checkpoint();*/ 348 } 349 } 350 351 /* 352 * Look for old packets that the secondary hasn't matched, 353 * if we have some then we have to checkpoint to wake 354 * the secondary up. 355 */ 356 static void colo_old_packet_check(void *opaque) 357 { 358 CompareState *s = opaque; 359 360 g_queue_foreach(&s->conn_list, colo_old_packet_check_one_conn, NULL); 361 } 362 363 /* 364 * Called from the compare thread on the primary 365 * for compare connection 366 */ 367 static void colo_compare_connection(void *opaque, void *user_data) 368 { 369 CompareState *s = user_data; 370 Connection *conn = opaque; 371 Packet *pkt = NULL; 372 GList *result = NULL; 373 int ret; 374 375 while (!g_queue_is_empty(&conn->primary_list) && 376 !g_queue_is_empty(&conn->secondary_list)) { 377 qemu_mutex_lock(&s->timer_check_lock); 378 pkt = g_queue_pop_tail(&conn->primary_list); 379 qemu_mutex_unlock(&s->timer_check_lock); 380 switch (conn->ip_proto) { 381 case IPPROTO_TCP: 382 result = g_queue_find_custom(&conn->secondary_list, 383 pkt, (GCompareFunc)colo_packet_compare_tcp); 384 break; 385 case IPPROTO_UDP: 386 result = g_queue_find_custom(&conn->secondary_list, 387 pkt, (GCompareFunc)colo_packet_compare_udp); 388 break; 389 case IPPROTO_ICMP: 390 result = g_queue_find_custom(&conn->secondary_list, 391 pkt, (GCompareFunc)colo_packet_compare_icmp); 392 break; 393 default: 394 result = g_queue_find_custom(&conn->secondary_list, 395 pkt, (GCompareFunc)colo_packet_compare_other); 396 break; 397 } 398 399 if (result) { 400 ret = compare_chr_send(&s->chr_out, pkt->data, pkt->size); 401 if (ret < 0) { 402 error_report("colo_send_primary_packet failed"); 403 } 404 trace_colo_compare_main("packet same and release packet"); 405 g_queue_remove(&conn->secondary_list, result->data); 406 packet_destroy(pkt, NULL); 407 } else { 408 /* 409 * If one packet arrive late, the secondary_list or 410 * primary_list will be empty, so we can't compare it 411 * until next comparison. 412 */ 413 trace_colo_compare_main("packet different"); 414 qemu_mutex_lock(&s->timer_check_lock); 415 g_queue_push_tail(&conn->primary_list, pkt); 416 qemu_mutex_unlock(&s->timer_check_lock); 417 /* TODO: colo_notify_checkpoint();*/ 418 break; 419 } 420 } 421 } 422 423 static int compare_chr_send(CharBackend *out, 424 const uint8_t *buf, 425 uint32_t size) 426 { 427 int ret = 0; 428 uint32_t len = htonl(size); 429 430 if (!size) { 431 return 0; 432 } 433 434 ret = qemu_chr_fe_write_all(out, (uint8_t *)&len, sizeof(len)); 435 if (ret != sizeof(len)) { 436 goto err; 437 } 438 439 ret = qemu_chr_fe_write_all(out, (uint8_t *)buf, size); 440 if (ret != size) { 441 goto err; 442 } 443 444 return 0; 445 446 err: 447 return ret < 0 ? ret : -EIO; 448 } 449 450 static int compare_chr_can_read(void *opaque) 451 { 452 return COMPARE_READ_LEN_MAX; 453 } 454 455 /* 456 * Called from the main thread on the primary for packets 457 * arriving over the socket from the primary. 458 */ 459 static void compare_pri_chr_in(void *opaque, const uint8_t *buf, int size) 460 { 461 CompareState *s = COLO_COMPARE(opaque); 462 int ret; 463 464 ret = net_fill_rstate(&s->pri_rs, buf, size); 465 if (ret == -1) { 466 qemu_chr_fe_set_handlers(&s->chr_pri_in, NULL, NULL, NULL, 467 NULL, NULL, true); 468 error_report("colo-compare primary_in error"); 469 } 470 } 471 472 /* 473 * Called from the main thread on the primary for packets 474 * arriving over the socket from the secondary. 475 */ 476 static void compare_sec_chr_in(void *opaque, const uint8_t *buf, int size) 477 { 478 CompareState *s = COLO_COMPARE(opaque); 479 int ret; 480 481 ret = net_fill_rstate(&s->sec_rs, buf, size); 482 if (ret == -1) { 483 qemu_chr_fe_set_handlers(&s->chr_sec_in, NULL, NULL, NULL, 484 NULL, NULL, true); 485 error_report("colo-compare secondary_in error"); 486 } 487 } 488 489 static void *colo_compare_thread(void *opaque) 490 { 491 GMainContext *worker_context; 492 GMainLoop *compare_loop; 493 CompareState *s = opaque; 494 495 worker_context = g_main_context_new(); 496 497 qemu_chr_fe_set_handlers(&s->chr_pri_in, compare_chr_can_read, 498 compare_pri_chr_in, NULL, s, worker_context, true); 499 qemu_chr_fe_set_handlers(&s->chr_sec_in, compare_chr_can_read, 500 compare_sec_chr_in, NULL, s, worker_context, true); 501 502 compare_loop = g_main_loop_new(worker_context, FALSE); 503 504 g_main_loop_run(compare_loop); 505 506 g_main_loop_unref(compare_loop); 507 g_main_context_unref(worker_context); 508 return NULL; 509 } 510 511 static char *compare_get_pri_indev(Object *obj, Error **errp) 512 { 513 CompareState *s = COLO_COMPARE(obj); 514 515 return g_strdup(s->pri_indev); 516 } 517 518 static void compare_set_pri_indev(Object *obj, const char *value, Error **errp) 519 { 520 CompareState *s = COLO_COMPARE(obj); 521 522 g_free(s->pri_indev); 523 s->pri_indev = g_strdup(value); 524 } 525 526 static char *compare_get_sec_indev(Object *obj, Error **errp) 527 { 528 CompareState *s = COLO_COMPARE(obj); 529 530 return g_strdup(s->sec_indev); 531 } 532 533 static void compare_set_sec_indev(Object *obj, const char *value, Error **errp) 534 { 535 CompareState *s = COLO_COMPARE(obj); 536 537 g_free(s->sec_indev); 538 s->sec_indev = g_strdup(value); 539 } 540 541 static char *compare_get_outdev(Object *obj, Error **errp) 542 { 543 CompareState *s = COLO_COMPARE(obj); 544 545 return g_strdup(s->outdev); 546 } 547 548 static void compare_set_outdev(Object *obj, const char *value, Error **errp) 549 { 550 CompareState *s = COLO_COMPARE(obj); 551 552 g_free(s->outdev); 553 s->outdev = g_strdup(value); 554 } 555 556 static void compare_pri_rs_finalize(SocketReadState *pri_rs) 557 { 558 CompareState *s = container_of(pri_rs, CompareState, pri_rs); 559 560 if (packet_enqueue(s, PRIMARY_IN)) { 561 trace_colo_compare_main("primary: unsupported packet in"); 562 compare_chr_send(&s->chr_out, pri_rs->buf, pri_rs->packet_len); 563 } else { 564 /* compare connection */ 565 g_queue_foreach(&s->conn_list, colo_compare_connection, s); 566 } 567 } 568 569 static void compare_sec_rs_finalize(SocketReadState *sec_rs) 570 { 571 CompareState *s = container_of(sec_rs, CompareState, sec_rs); 572 573 if (packet_enqueue(s, SECONDARY_IN)) { 574 trace_colo_compare_main("secondary: unsupported packet in"); 575 } else { 576 /* compare connection */ 577 g_queue_foreach(&s->conn_list, colo_compare_connection, s); 578 } 579 } 580 581 582 /* 583 * Return 0 is success. 584 * Return 1 is failed. 585 */ 586 static int find_and_check_chardev(Chardev **chr, 587 char *chr_name, 588 Error **errp) 589 { 590 *chr = qemu_chr_find(chr_name); 591 if (*chr == NULL) { 592 error_setg(errp, "Device '%s' not found", 593 chr_name); 594 return 1; 595 } 596 597 if (!qemu_chr_has_feature(*chr, QEMU_CHAR_FEATURE_RECONNECTABLE)) { 598 error_setg(errp, "chardev \"%s\" is not reconnectable", 599 chr_name); 600 return 1; 601 } 602 603 return 0; 604 } 605 606 /* 607 * Check old packet regularly so it can watch for any packets 608 * that the secondary hasn't produced equivalents of. 609 */ 610 static void check_old_packet_regular(void *opaque) 611 { 612 CompareState *s = opaque; 613 614 timer_mod(s->timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + 615 REGULAR_PACKET_CHECK_MS); 616 /* if have old packet we will notify checkpoint */ 617 /* 618 * TODO: Make timer handler run in compare thread 619 * like qemu_chr_add_handlers_full. 620 */ 621 qemu_mutex_lock(&s->timer_check_lock); 622 colo_old_packet_check(s); 623 qemu_mutex_unlock(&s->timer_check_lock); 624 } 625 626 /* 627 * Called from the main thread on the primary 628 * to setup colo-compare. 629 */ 630 static void colo_compare_complete(UserCreatable *uc, Error **errp) 631 { 632 CompareState *s = COLO_COMPARE(uc); 633 Chardev *chr; 634 char thread_name[64]; 635 static int compare_id; 636 637 if (!s->pri_indev || !s->sec_indev || !s->outdev) { 638 error_setg(errp, "colo compare needs 'primary_in' ," 639 "'secondary_in','outdev' property set"); 640 return; 641 } else if (!strcmp(s->pri_indev, s->outdev) || 642 !strcmp(s->sec_indev, s->outdev) || 643 !strcmp(s->pri_indev, s->sec_indev)) { 644 error_setg(errp, "'indev' and 'outdev' could not be same " 645 "for compare module"); 646 return; 647 } 648 649 if (find_and_check_chardev(&chr, s->pri_indev, errp) || 650 !qemu_chr_fe_init(&s->chr_pri_in, chr, errp)) { 651 return; 652 } 653 654 if (find_and_check_chardev(&chr, s->sec_indev, errp) || 655 !qemu_chr_fe_init(&s->chr_sec_in, chr, errp)) { 656 return; 657 } 658 659 if (find_and_check_chardev(&chr, s->outdev, errp) || 660 !qemu_chr_fe_init(&s->chr_out, chr, errp)) { 661 return; 662 } 663 664 net_socket_rs_init(&s->pri_rs, compare_pri_rs_finalize); 665 net_socket_rs_init(&s->sec_rs, compare_sec_rs_finalize); 666 667 g_queue_init(&s->conn_list); 668 qemu_mutex_init(&s->timer_check_lock); 669 670 s->connection_track_table = g_hash_table_new_full(connection_key_hash, 671 connection_key_equal, 672 g_free, 673 connection_destroy); 674 675 sprintf(thread_name, "colo-compare %d", compare_id); 676 qemu_thread_create(&s->thread, thread_name, 677 colo_compare_thread, s, 678 QEMU_THREAD_JOINABLE); 679 compare_id++; 680 681 /* A regular timer to kick any packets that the secondary doesn't match */ 682 s->timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, /* Only when guest runs */ 683 check_old_packet_regular, s); 684 timer_mod(s->timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + 685 REGULAR_PACKET_CHECK_MS); 686 687 return; 688 } 689 690 static void colo_compare_class_init(ObjectClass *oc, void *data) 691 { 692 UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc); 693 694 ucc->complete = colo_compare_complete; 695 } 696 697 static void colo_compare_init(Object *obj) 698 { 699 object_property_add_str(obj, "primary_in", 700 compare_get_pri_indev, compare_set_pri_indev, 701 NULL); 702 object_property_add_str(obj, "secondary_in", 703 compare_get_sec_indev, compare_set_sec_indev, 704 NULL); 705 object_property_add_str(obj, "outdev", 706 compare_get_outdev, compare_set_outdev, 707 NULL); 708 } 709 710 static void colo_compare_finalize(Object *obj) 711 { 712 CompareState *s = COLO_COMPARE(obj); 713 714 qemu_chr_fe_deinit(&s->chr_pri_in); 715 qemu_chr_fe_deinit(&s->chr_sec_in); 716 qemu_chr_fe_deinit(&s->chr_out); 717 718 g_queue_free(&s->conn_list); 719 720 if (qemu_thread_is_self(&s->thread)) { 721 /* compare connection */ 722 g_queue_foreach(&s->conn_list, colo_compare_connection, s); 723 qemu_thread_join(&s->thread); 724 } 725 726 if (s->timer) { 727 timer_del(s->timer); 728 } 729 730 qemu_mutex_destroy(&s->timer_check_lock); 731 732 g_free(s->pri_indev); 733 g_free(s->sec_indev); 734 g_free(s->outdev); 735 } 736 737 static const TypeInfo colo_compare_info = { 738 .name = TYPE_COLO_COMPARE, 739 .parent = TYPE_OBJECT, 740 .instance_size = sizeof(CompareState), 741 .instance_init = colo_compare_init, 742 .instance_finalize = colo_compare_finalize, 743 .class_size = sizeof(CompareClass), 744 .class_init = colo_compare_class_init, 745 .interfaces = (InterfaceInfo[]) { 746 { TYPE_USER_CREATABLE }, 747 { } 748 } 749 }; 750 751 static void register_types(void) 752 { 753 type_register_static(&colo_compare_info); 754 } 755 756 type_init(register_types); 757