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