tests/migration-test.c

   1 /*
   2  * QTest testcase for migration
   3  *
   4  * Copyright (c) 2016-2018 Red Hat, Inc. and/or its affiliates
   5  *   based on the vhost-user-test.c that is:
   6  *      Copyright (c) 2014 Virtual Open Systems Sarl.
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   9  * See the COPYING file in the top-level directory.
  10  *
  11  */
  12
  13 #include "qemu/osdep.h"
  14
  15 #include "libqtest.h"
  16 #include "qapi/qmp/qdict.h"
  17 #include "qemu/option.h"
  18 #include "qemu/range.h"
  19 #include "qemu/sockets.h"
  20 #include "chardev/char.h"
  21 #include "sysemu/sysemu.h"
  22
  23 /* TODO actually test the results and get rid of this */
  24 #define qtest_qmp_discard_response(...) qobject_unref(qtest_qmp(__VA_ARGS__))
  25
  26 const unsigned start_address = 1024 * 1024;
  27 const unsigned end_address = 100 * 1024 * 1024;
  28 bool got_stop;
  29 static bool uffd_feature_thread_id;
  30
  31 #if defined(__linux__)
  32 #include <sys/syscall.h>
  33 #include <sys/vfs.h>
  34 #endif
  35
  36 #if defined(__linux__) && defined(__NR_userfaultfd) && defined(CONFIG_EVENTFD)
  37 #include <sys/eventfd.h>
  38 #include <sys/ioctl.h>
  39 #include <linux/userfaultfd.h>
  40
  41 static bool ufd_version_check(void)
  42 {
  43     struct uffdio_api api_struct;
  44     uint64_t ioctl_mask;
  45
  46     int ufd = syscall(__NR_userfaultfd, O_CLOEXEC);
  47
  48     if (ufd == -1) {
  49         g_test_message("Skipping test: userfaultfd not available");
  50         return false;
  51     }
  52
  53     api_struct.api = UFFD_API;
  54     api_struct.features = 0;
  55     if (ioctl(ufd, UFFDIO_API, &api_struct)) {
  56         g_test_message("Skipping test: UFFDIO_API failed");
  57         return false;
  58     }
  59     uffd_feature_thread_id = api_struct.features & UFFD_FEATURE_THREAD_ID;
  60
  61     ioctl_mask = (__u64)1 << _UFFDIO_REGISTER |
  62                  (__u64)1 << _UFFDIO_UNREGISTER;
  63     if ((api_struct.ioctls & ioctl_mask) != ioctl_mask) {
  64         g_test_message("Skipping test: Missing userfault feature");
  65         return false;
  66     }
  67
  68     return true;
  69 }
  70
  71 #else
  72 static bool ufd_version_check(void)
  73 {
  74     g_test_message("Skipping test: Userfault not available (builtdtime)");
  75     return false;
  76 }
  77
  78 #endif
  79
  80 static const char *tmpfs;
  81
  82 /* A simple PC boot sector that modifies memory (1-100MB) quickly
  83  * outputting a 'B' every so often if it's still running.
  84  */
  85 #include "tests/migration/x86-a-b-bootblock.h"
  86
  87 static void init_bootfile_x86(const char *bootpath)
  88 {
  89     FILE *bootfile = fopen(bootpath, "wb");
  90
  91     g_assert_cmpint(fwrite(x86_bootsect, 512, 1, bootfile), ==, 1);
  92     fclose(bootfile);
  93 }
  94
  95 /*
  96  * Wait for some output in the serial output file,
  97  * we get an 'A' followed by an endless string of 'B's
  98  * but on the destination we won't have the A.
  99  */
 100 static void wait_for_serial(const char *side)
 101 {
 102     char *serialpath = g_strdup_printf("%s/%s", tmpfs, side);
 103     FILE *serialfile = fopen(serialpath, "r");
 104     const char *arch = qtest_get_arch();
 105     int started = (strcmp(side, "src_serial") == 0 &&
 106                    strcmp(arch, "ppc64") == 0) ? 0 : 1;
 107
 108     g_free(serialpath);
 109     do {
 110         int readvalue = fgetc(serialfile);
 111
 112         if (!started) {
 113             /* SLOF prints its banner before starting test,
 114              * to ignore it, mark the start of the test with '_',
 115              * ignore all characters until this marker
 116              */
 117             switch (readvalue) {
 118             case '_':
 119                 started = 1;
 120                 break;
 121             case EOF:
 122                 fseek(serialfile, 0, SEEK_SET);
 123                 usleep(1000);
 124                 break;
 125             }
 126             continue;
 127         }
 128         switch (readvalue) {
 129         case 'A':
 130             /* Fine */
 131             break;
 132
 133         case 'B':
 134             /* It's alive! */
 135             fclose(serialfile);
 136             return;
 137
 138         case EOF:
 139             started = (strcmp(side, "src_serial") == 0 &&
 140                        strcmp(arch, "ppc64") == 0) ? 0 : 1;
 141             fseek(serialfile, 0, SEEK_SET);
 142             usleep(1000);
 143             break;
 144
 145         default:
 146             fprintf(stderr, "Unexpected %d on %s serial\n", readvalue, side);
 147             g_assert_not_reached();
 148         }
 149     } while (true);
 150 }
 151
 152 static void stop_cb(void *opaque, const char *name, QDict *data)
 153 {
 154     if (!strcmp(name, "STOP")) {
 155         got_stop = true;
 156     }
 157 }
 158
 159 /*
 160  * Events can get in the way of responses we are actually waiting for.
 161  */
 162 static QDict *wait_command(QTestState *who, const char *command, ...)
 163 {
 164     va_list ap;
 165
 166     va_start(ap, command);
 167     qtest_qmp_vsend(who, command, ap);
 168     va_end(ap);
 169
 170     return qtest_qmp_receive_success(who, stop_cb, NULL);
 171 }
 172
 173 /*
 174  * Note: caller is responsible to free the returned object via
 175  * qobject_unref() after use
 176  */
 177 static QDict *migrate_query(QTestState *who)
 178 {
 179     return wait_command(who, "{ 'execute': 'query-migrate' }");
 180 }
 181
 182 /*
 183  * Note: caller is responsible to free the returned object via
 184  * g_free() after use
 185  */
 186 static gchar *migrate_query_status(QTestState *who)
 187 {
 188     QDict *rsp_return = migrate_query(who);
 189     gchar *status = g_strdup(qdict_get_str(rsp_return, "status"));
 190
 191     g_assert(status);
 192     qobject_unref(rsp_return);
 193
 194     return status;
 195 }
 196
 197 /*
 198  * It's tricky to use qemu's migration event capability with qtest,
 199  * events suddenly appearing confuse the qmp()/hmp() responses.
 200  */
 201
 202 static uint64_t get_migration_pass(QTestState *who)
 203 {
 204     QDict *rsp_return, *rsp_ram;
 205     uint64_t result;
 206
 207     rsp_return = migrate_query(who);
 208     if (!qdict_haskey(rsp_return, "ram")) {
 209         /* Still in setup */
 210         result = 0;
 211     } else {
 212         rsp_ram = qdict_get_qdict(rsp_return, "ram");
 213         result = qdict_get_try_int(rsp_ram, "dirty-sync-count", 0);
 214     }
 215     qobject_unref(rsp_return);
 216     return result;
 217 }
 218
 219 static void read_blocktime(QTestState *who)
 220 {
 221     QDict *rsp_return;
 222
 223     rsp_return = migrate_query(who);
 224     g_assert(qdict_haskey(rsp_return, "postcopy-blocktime"));
 225     qobject_unref(rsp_return);
 226 }
 227
 228 static void wait_for_migration_status(QTestState *who,
 229                                       const char *goal)
 230 {
 231     while (true) {
 232         bool completed;
 233         char *status;
 234
 235         status = migrate_query_status(who);
 236         completed = strcmp(status, goal) == 0;
 237         g_assert_cmpstr(status, !=,  "failed");
 238         g_free(status);
 239         if (completed) {
 240             return;
 241         }
 242         usleep(1000);
 243     }
 244 }
 245
 246 static void wait_for_migration_complete(QTestState *who)
 247 {
 248     wait_for_migration_status(who, "completed");
 249 }
 250
 251 static void wait_for_migration_pass(QTestState *who)
 252 {
 253     uint64_t initial_pass = get_migration_pass(who);
 254     uint64_t pass;
 255
 256     /* Wait for the 1st sync */
 257     while (!got_stop && !initial_pass) {
 258         usleep(1000);
 259         initial_pass = get_migration_pass(who);
 260     }
 261
 262     do {
 263         usleep(1000);
 264         pass = get_migration_pass(who);
 265     } while (pass == initial_pass && !got_stop);
 266 }
 267
 268 static void check_guests_ram(QTestState *who)
 269 {
 270     /* Our ASM test will have been incrementing one byte from each page from
 271      * 1MB to <100MB in order.
 272      * This gives us a constraint that any page's byte should be equal or less
 273      * than the previous pages byte (mod 256); and they should all be equal
 274      * except for one transition at the point where we meet the incrementer.
 275      * (We're running this with the guest stopped).
 276      */
 277     unsigned address;
 278     uint8_t first_byte;
 279     uint8_t last_byte;
 280     bool hit_edge = false;
 281     bool bad = false;
 282
 283     qtest_memread(who, start_address, &first_byte, 1);
 284     last_byte = first_byte;
 285
 286     for (address = start_address + 4096; address < end_address; address += 4096)
 287     {
 288         uint8_t b;
 289         qtest_memread(who, address, &b, 1);
 290         if (b != last_byte) {
 291             if (((b + 1) % 256) == last_byte && !hit_edge) {
 292                 /* This is OK, the guest stopped at the point of
 293                  * incrementing the previous page but didn't get
 294                  * to us yet.
 295                  */
 296                 hit_edge = true;
 297                 last_byte = b;
 298             } else {
 299                 fprintf(stderr, "Memory content inconsistency at %x"
 300                                 " first_byte = %x last_byte = %x current = %x"
 301                                 " hit_edge = %x\n",
 302                                 address, first_byte, last_byte, b, hit_edge);
 303                 bad = true;
 304             }
 305         }
 306     }
 307     g_assert_false(bad);
 308 }
 309
 310 static void cleanup(const char *filename)
 311 {
 312     char *path = g_strdup_printf("%s/%s", tmpfs, filename);
 313
 314     unlink(path);
 315     g_free(path);
 316 }
 317
 318 static void migrate_check_parameter(QTestState *who, const char *parameter,
 319                                     const char *value)
 320 {
 321     QDict *rsp_return;
 322     char *result;
 323
 324     rsp_return = wait_command(who,
 325                               "{ 'execute': 'query-migrate-parameters' }");
 326     result = g_strdup_printf("%" PRId64,
 327                              qdict_get_try_int(rsp_return,  parameter, -1));
 328     g_assert_cmpstr(result, ==, value);
 329     g_free(result);
 330     qobject_unref(rsp_return);
 331 }
 332
 333 static void migrate_set_parameter(QTestState *who, const char *parameter,
 334                                   const char *value)
 335 {
 336     QDict *rsp;
 337     gchar *cmd;
 338
 339     cmd = g_strdup_printf("{ 'execute': 'migrate-set-parameters',"
 340                           "'arguments': { '%s': %s } }",
 341                           parameter, value);
 342     rsp = qtest_qmp(who, cmd);
 343     g_free(cmd);
 344     g_assert(qdict_haskey(rsp, "return"));
 345     qobject_unref(rsp);
 346     migrate_check_parameter(who, parameter, value);
 347 }
 348
 349 static void migrate_pause(QTestState *who)
 350 {
 351     QDict *rsp;
 352
 353     rsp = wait_command(who, "{ 'execute': 'migrate-pause' }");
 354     qobject_unref(rsp);
 355 }
 356
 357 static void migrate_recover(QTestState *who, const char *uri)
 358 {
 359     QDict *rsp;
 360     gchar *cmd = g_strdup_printf(
 361         "{ 'execute': 'migrate-recover', "
 362         "  'id': 'recover-cmd', "
 363         "  'arguments': { 'uri': '%s' } }", uri);
 364
 365     rsp = wait_command(who, cmd);
 366     g_free(cmd);
 367     qobject_unref(rsp);
 368 }
 369
 370 static void migrate_set_capability(QTestState *who, const char *capability,
 371                                    const char *value)
 372 {
 373     QDict *rsp;
 374     gchar *cmd;
 375
 376     cmd = g_strdup_printf("{ 'execute': 'migrate-set-capabilities',"
 377                           "'arguments': { "
 378                           "'capabilities': [ { "
 379                           "'capability': '%s', 'state': %s } ] } }",
 380                           capability, value);
 381     rsp = qtest_qmp(who, cmd);
 382     g_free(cmd);
 383     g_assert(qdict_haskey(rsp, "return"));
 384     qobject_unref(rsp);
 385 }
 386
 387 static void migrate(QTestState *who, const char *uri, const char *extra)
 388 {
 389     QDict *rsp;
 390     gchar *cmd;
 391
 392     cmd = g_strdup_printf("{ 'execute': 'migrate',"
 393                           "  'arguments': { 'uri': '%s' %s } }",
 394                           uri, extra ? extra : "");
 395     rsp = qtest_qmp(who, cmd);
 396     g_free(cmd);
 397     g_assert(qdict_haskey(rsp, "return"));
 398     qobject_unref(rsp);
 399 }
 400
 401 static void migrate_postcopy_start(QTestState *from, QTestState *to)
 402 {
 403     QDict *rsp;
 404
 405     rsp = wait_command(from, "{ 'execute': 'migrate-start-postcopy' }");
 406     qobject_unref(rsp);
 407
 408     if (!got_stop) {
 409         qtest_qmp_eventwait(from, "STOP");
 410     }
 411
 412     qtest_qmp_eventwait(to, "RESUME");
 413 }
 414
 415 static int test_migrate_start(QTestState **from, QTestState **to,
 416                                const char *uri, bool hide_stderr)
 417 {
 418     gchar *cmd_src, *cmd_dst;
 419     char *bootpath = g_strdup_printf("%s/bootsect", tmpfs);
 420     const char *arch = qtest_get_arch();
 421     const char *accel = "kvm:tcg";
 422
 423     got_stop = false;
 424
 425     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
 426         init_bootfile_x86(bootpath);
 427         cmd_src = g_strdup_printf("-machine accel=%s -m 150M"
 428                                   " -name source,debug-threads=on"
 429                                   " -serial file:%s/src_serial"
 430                                   " -drive file=%s,format=raw",
 431                                   accel, tmpfs, bootpath);
 432         cmd_dst = g_strdup_printf("-machine accel=%s -m 150M"
 433                                   " -name target,debug-threads=on"
 434                                   " -serial file:%s/dest_serial"
 435                                   " -drive file=%s,format=raw"
 436                                   " -incoming %s",
 437                                   accel, tmpfs, bootpath, uri);
 438     } else if (strcmp(arch, "ppc64") == 0) {
 439
 440         /* On ppc64, the test only works with kvm-hv, but not with kvm-pr
 441          * and TCG is touchy due to race conditions on dirty bits
 442          * (especially on PPC for some reason)
 443          */
 444         if (access("/sys/module/kvm_hv", F_OK)) {
 445             g_print("Skipping test: kvm_hv not available ");
 446             return -1;
 447         }
 448         cmd_src = g_strdup_printf("-machine accel=%s -m 256M"
 449                                   " -name source,debug-threads=on"
 450                                   " -serial file:%s/src_serial"
 451                                   " -prom-env '"
 452                                   "boot-command=hex .\" _\" begin %x %x "
 453                                   "do i c@ 1 + i c! 1000 +loop .\" B\" 0 "
 454                                   "until'",  accel, tmpfs, end_address,
 455                                   start_address);
 456         cmd_dst = g_strdup_printf("-machine accel=%s -m 256M"
 457                                   " -name target,debug-threads=on"
 458                                   " -serial file:%s/dest_serial"
 459                                   " -incoming %s",
 460                                   accel, tmpfs, uri);
 461     } else {
 462         g_assert_not_reached();
 463     }
 464
 465     g_free(bootpath);
 466
 467     if (hide_stderr) {
 468         gchar *tmp;
 469         tmp = g_strdup_printf("%s 2>/dev/null", cmd_src);
 470         g_free(cmd_src);
 471         cmd_src = tmp;
 472
 473         tmp = g_strdup_printf("%s 2>/dev/null", cmd_dst);
 474         g_free(cmd_dst);
 475         cmd_dst = tmp;
 476     }
 477
 478     *from = qtest_start(cmd_src);
 479     g_free(cmd_src);
 480
 481     *to = qtest_init(cmd_dst);
 482     g_free(cmd_dst);
 483     return 0;
 484 }
 485
 486 static void test_migrate_end(QTestState *from, QTestState *to, bool test_dest)
 487 {
 488     unsigned char dest_byte_a, dest_byte_b, dest_byte_c, dest_byte_d;
 489
 490     qtest_quit(from);
 491
 492     if (test_dest) {
 493         qtest_memread(to, start_address, &dest_byte_a, 1);
 494
 495         /* Destination still running, wait for a byte to change */
 496         do {
 497             qtest_memread(to, start_address, &dest_byte_b, 1);
 498             usleep(1000 * 10);
 499         } while (dest_byte_a == dest_byte_b);
 500
 501         qtest_qmp_discard_response(to, "{ 'execute' : 'stop'}");
 502
 503         /* With it stopped, check nothing changes */
 504         qtest_memread(to, start_address, &dest_byte_c, 1);
 505         usleep(1000 * 200);
 506         qtest_memread(to, start_address, &dest_byte_d, 1);
 507         g_assert_cmpint(dest_byte_c, ==, dest_byte_d);
 508
 509         check_guests_ram(to);
 510     }
 511
 512     qtest_quit(to);
 513
 514     cleanup("bootsect");
 515     cleanup("migsocket");
 516     cleanup("src_serial");
 517     cleanup("dest_serial");
 518 }
 519
 520 static void deprecated_set_downtime(QTestState *who, const double value)
 521 {
 522     QDict *rsp;
 523     char *expected;
 524     int64_t result_int;
 525
 526     rsp = qtest_qmp(who,
 527                     "{ 'execute': 'migrate_set_downtime',"
 528                     " 'arguments': { 'value': %f } }", value);
 529     g_assert(qdict_haskey(rsp, "return"));
 530     qobject_unref(rsp);
 531     result_int = value * 1000L;
 532     expected = g_strdup_printf("%" PRId64, result_int);
 533     migrate_check_parameter(who, "downtime-limit", expected);
 534     g_free(expected);
 535 }
 536
 537 static void deprecated_set_speed(QTestState *who, const char *value)
 538 {
 539     QDict *rsp;
 540     gchar *cmd;
 541
 542     cmd = g_strdup_printf("{ 'execute': 'migrate_set_speed',"
 543                           "'arguments': { 'value': %s } }", value);
 544     rsp = qtest_qmp(who, cmd);
 545     g_free(cmd);
 546     g_assert(qdict_haskey(rsp, "return"));
 547     qobject_unref(rsp);
 548     migrate_check_parameter(who, "max-bandwidth", value);
 549 }
 550
 551 static void test_deprecated(void)
 552 {
 553     QTestState *from;
 554
 555     from = qtest_start("");
 556
 557     deprecated_set_downtime(from, 0.12345);
 558     deprecated_set_speed(from, "12345");
 559
 560     qtest_quit(from);
 561 }
 562
 563 static int migrate_postcopy_prepare(QTestState **from_ptr,
 564                                      QTestState **to_ptr,
 565                                      bool hide_error)
 566 {
 567     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 568     QTestState *from, *to;
 569
 570     if (test_migrate_start(&from, &to, uri, hide_error)) {
 571         return -1;
 572     }
 573
 574     migrate_set_capability(from, "postcopy-ram", "true");
 575     migrate_set_capability(to, "postcopy-ram", "true");
 576     migrate_set_capability(to, "postcopy-blocktime", "true");
 577
 578     /* We want to pick a speed slow enough that the test completes
 579      * quickly, but that it doesn't complete precopy even on a slow
 580      * machine, so also set the downtime.
 581      */
 582     migrate_set_parameter(from, "max-bandwidth", "100000000");
 583     migrate_set_parameter(from, "downtime-limit", "1");
 584
 585     /* Wait for the first serial output from the source */
 586     wait_for_serial("src_serial");
 587
 588     migrate(from, uri, NULL);
 589     g_free(uri);
 590
 591     wait_for_migration_pass(from);
 592
 593     *from_ptr = from;
 594     *to_ptr = to;
 595
 596     return 0;
 597 }
 598
 599 static void migrate_postcopy_complete(QTestState *from, QTestState *to)
 600 {
 601     wait_for_migration_complete(from);
 602
 603     /* Make sure we get at least one "B" on destination */
 604     wait_for_serial("dest_serial");
 605
 606     if (uffd_feature_thread_id) {
 607         read_blocktime(to);
 608     }
 609
 610     test_migrate_end(from, to, true);
 611 }
 612
 613 static void test_postcopy(void)
 614 {
 615     QTestState *from, *to;
 616
 617     if (migrate_postcopy_prepare(&from, &to, false)) {
 618         return;
 619     }
 620     migrate_postcopy_start(from, to);
 621     migrate_postcopy_complete(from, to);
 622 }
 623
 624 static void test_postcopy_recovery(void)
 625 {
 626     QTestState *from, *to;
 627     char *uri;
 628
 629     if (migrate_postcopy_prepare(&from, &to, true)) {
 630         return;
 631     }
 632
 633     /* Turn postcopy speed down, 4K/s is slow enough on any machines */
 634     migrate_set_parameter(from, "max-postcopy-bandwidth", "4096");
 635
 636     /* Now we start the postcopy */
 637     migrate_postcopy_start(from, to);
 638
 639     /*
 640      * Wait until postcopy is really started; we can only run the
 641      * migrate-pause command during a postcopy
 642      */
 643     wait_for_migration_status(from, "postcopy-active");
 644
 645     /*
 646      * Manually stop the postcopy migration. This emulates a network
 647      * failure with the migration socket
 648      */
 649     migrate_pause(from);
 650
 651     /*
 652      * Wait for destination side to reach postcopy-paused state.  The
 653      * migrate-recover command can only succeed if destination machine
 654      * is in the paused state
 655      */
 656     wait_for_migration_status(to, "postcopy-paused");
 657
 658     /*
 659      * Create a new socket to emulate a new channel that is different
 660      * from the broken migration channel; tell the destination to
 661      * listen to the new port
 662      */
 663     uri = g_strdup_printf("unix:%s/migsocket-recover", tmpfs);
 664     migrate_recover(to, uri);
 665
 666     /*
 667      * Try to rebuild the migration channel using the resume flag and
 668      * the newly created channel
 669      */
 670     wait_for_migration_status(from, "postcopy-paused");
 671     migrate(from, uri, ", 'resume': true");
 672     g_free(uri);
 673
 674     /* Restore the postcopy bandwidth to unlimited */
 675     migrate_set_parameter(from, "max-postcopy-bandwidth", "0");
 676
 677     migrate_postcopy_complete(from, to);
 678 }
 679
 680 static void test_baddest(void)
 681 {
 682     QTestState *from, *to;
 683     QDict *rsp_return;
 684     char *status;
 685     bool failed;
 686
 687     if (test_migrate_start(&from, &to, "tcp:0:0", true)) {
 688         return;
 689     }
 690     migrate(from, "tcp:0:0", NULL);
 691     do {
 692         status = migrate_query_status(from);
 693         g_assert(!strcmp(status, "setup") || !(strcmp(status, "failed")));
 694         failed = !strcmp(status, "failed");
 695         g_free(status);
 696     } while (!failed);
 697
 698     /* Is the machine currently running? */
 699     rsp_return = wait_command(from, "{ 'execute': 'query-status' }");
 700     g_assert(qdict_haskey(rsp_return, "running"));
 701     g_assert(qdict_get_bool(rsp_return, "running"));
 702     qobject_unref(rsp_return);
 703
 704     test_migrate_end(from, to, false);
 705 }
 706
 707 static void test_precopy_unix(void)
 708 {
 709     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 710     QTestState *from, *to;
 711
 712     if (test_migrate_start(&from, &to, uri, false)) {
 713         return;
 714     }
 715
 716     /* We want to pick a speed slow enough that the test completes
 717      * quickly, but that it doesn't complete precopy even on a slow
 718      * machine, so also set the downtime.
 719      */
 720     /* 1 ms should make it not converge*/
 721     migrate_set_parameter(from, "downtime-limit", "1");
 722     /* 1GB/s */
 723     migrate_set_parameter(from, "max-bandwidth", "1000000000");
 724
 725     /* Wait for the first serial output from the source */
 726     wait_for_serial("src_serial");
 727
 728     migrate(from, uri, NULL);
 729
 730     wait_for_migration_pass(from);
 731
 732     /* 300 ms should converge */
 733     migrate_set_parameter(from, "downtime-limit", "300");
 734
 735     if (!got_stop) {
 736         qtest_qmp_eventwait(from, "STOP");
 737     }
 738
 739     qtest_qmp_eventwait(to, "RESUME");
 740
 741     wait_for_serial("dest_serial");
 742     wait_for_migration_complete(from);
 743
 744     test_migrate_end(from, to, true);
 745     g_free(uri);
 746 }
 747
 748 int main(int argc, char **argv)
 749 {
 750     char template[] = "/tmp/migration-test-XXXXXX";
 751     int ret;
 752
 753     g_test_init(&argc, &argv, NULL);
 754
 755     if (!ufd_version_check()) {
 756         return 0;
 757     }
 758
 759     tmpfs = mkdtemp(template);
 760     if (!tmpfs) {
 761         g_test_message("mkdtemp on path (%s): %s\n", template, strerror(errno));
 762     }
 763     g_assert(tmpfs);
 764
 765     module_call_init(MODULE_INIT_QOM);
 766
 767     qtest_add_func("/migration/postcopy/unix", test_postcopy);
 768     qtest_add_func("/migration/postcopy/recovery", test_postcopy_recovery);
 769     qtest_add_func("/migration/deprecated", test_deprecated);
 770     qtest_add_func("/migration/bad_dest", test_baddest);
 771     qtest_add_func("/migration/precopy/unix", test_precopy_unix);
 772
 773     ret = g_test_run();
 774
 775     g_assert_cmpint(ret, ==, 0);
 776
 777     ret = rmdir(tmpfs);
 778     if (ret != 0) {
 779         g_test_message("unable to rmdir: path (%s): %s\n",
 780                        tmpfs, strerror(errno));
 781     }
 782
 783     return ret;
 784 }