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 const unsigned start_address = 1024 * 1024;
  24 const unsigned end_address = 100 * 1024 * 1024;
  25 bool got_stop;
  26 static bool uffd_feature_thread_id;
  27
  28 #if defined(__linux__)
  29 #include <sys/syscall.h>
  30 #include <sys/vfs.h>
  31 #endif
  32
  33 #if defined(__linux__) && defined(__NR_userfaultfd) && defined(CONFIG_EVENTFD)
  34 #include <sys/eventfd.h>
  35 #include <sys/ioctl.h>
  36 #include <linux/userfaultfd.h>
  37
  38 static bool ufd_version_check(void)
  39 {
  40     struct uffdio_api api_struct;
  41     uint64_t ioctl_mask;
  42
  43     int ufd = syscall(__NR_userfaultfd, O_CLOEXEC);
  44
  45     if (ufd == -1) {
  46         g_test_message("Skipping test: userfaultfd not available");
  47         return false;
  48     }
  49
  50     api_struct.api = UFFD_API;
  51     api_struct.features = 0;
  52     if (ioctl(ufd, UFFDIO_API, &api_struct)) {
  53         g_test_message("Skipping test: UFFDIO_API failed");
  54         return false;
  55     }
  56     uffd_feature_thread_id = api_struct.features & UFFD_FEATURE_THREAD_ID;
  57
  58     ioctl_mask = (__u64)1 << _UFFDIO_REGISTER |
  59                  (__u64)1 << _UFFDIO_UNREGISTER;
  60     if ((api_struct.ioctls & ioctl_mask) != ioctl_mask) {
  61         g_test_message("Skipping test: Missing userfault feature");
  62         return false;
  63     }
  64
  65     return true;
  66 }
  67
  68 #else
  69 static bool ufd_version_check(void)
  70 {
  71     g_test_message("Skipping test: Userfault not available (builtdtime)");
  72     return false;
  73 }
  74
  75 #endif
  76
  77 static const char *tmpfs;
  78
  79 /* A simple PC boot sector that modifies memory (1-100MB) quickly
  80  * outputting a 'B' every so often if it's still running.
  81  */
  82 #include "tests/migration/x86-a-b-bootblock.h"
  83
  84 static void init_bootfile_x86(const char *bootpath)
  85 {
  86     FILE *bootfile = fopen(bootpath, "wb");
  87
  88     g_assert_cmpint(fwrite(x86_bootsect, 512, 1, bootfile), ==, 1);
  89     fclose(bootfile);
  90 }
  91
  92 /*
  93  * Wait for some output in the serial output file,
  94  * we get an 'A' followed by an endless string of 'B's
  95  * but on the destination we won't have the A.
  96  */
  97 static void wait_for_serial(const char *side)
  98 {
  99     char *serialpath = g_strdup_printf("%s/%s", tmpfs, side);
 100     FILE *serialfile = fopen(serialpath, "r");
 101     const char *arch = qtest_get_arch();
 102     int started = (strcmp(side, "src_serial") == 0 &&
 103                    strcmp(arch, "ppc64") == 0) ? 0 : 1;
 104
 105     g_free(serialpath);
 106     do {
 107         int readvalue = fgetc(serialfile);
 108
 109         if (!started) {
 110             /* SLOF prints its banner before starting test,
 111              * to ignore it, mark the start of the test with '_',
 112              * ignore all characters until this marker
 113              */
 114             switch (readvalue) {
 115             case '_':
 116                 started = 1;
 117                 break;
 118             case EOF:
 119                 fseek(serialfile, 0, SEEK_SET);
 120                 usleep(1000);
 121                 break;
 122             }
 123             continue;
 124         }
 125         switch (readvalue) {
 126         case 'A':
 127             /* Fine */
 128             break;
 129
 130         case 'B':
 131             /* It's alive! */
 132             fclose(serialfile);
 133             return;
 134
 135         case EOF:
 136             started = (strcmp(side, "src_serial") == 0 &&
 137                        strcmp(arch, "ppc64") == 0) ? 0 : 1;
 138             fseek(serialfile, 0, SEEK_SET);
 139             usleep(1000);
 140             break;
 141
 142         default:
 143             fprintf(stderr, "Unexpected %d on %s serial\n", readvalue, side);
 144             g_assert_not_reached();
 145         }
 146     } while (true);
 147 }
 148
 149 /*
 150  * Events can get in the way of responses we are actually waiting for.
 151  */
 152 static QDict *wait_command(QTestState *who, const char *command)
 153 {
 154     const char *event_string;
 155     QDict *response;
 156
 157     response = qtest_qmp(who, command);
 158
 159     while (qdict_haskey(response, "event")) {
 160         /* OK, it was an event */
 161         event_string = qdict_get_str(response, "event");
 162         if (!strcmp(event_string, "STOP")) {
 163             got_stop = true;
 164         }
 165         qobject_unref(response);
 166         response = qtest_qmp_receive(who);
 167     }
 168     return response;
 169 }
 170
 171 /*
 172  * Note: caller is responsible to free the returned object via
 173  * qobject_unref() after use
 174  */
 175 static QDict *migrate_query(QTestState *who)
 176 {
 177     QDict *rsp, *rsp_return;
 178
 179     rsp = wait_command(who, "{ 'execute': 'query-migrate' }");
 180     rsp_return = qdict_get_qdict(rsp, "return");
 181     g_assert(rsp_return);
 182     qobject_ref(rsp_return);
 183     qobject_unref(rsp);
 184
 185     return rsp_return;
 186 }
 187
 188 /*
 189  * Note: caller is responsible to free the returned object via
 190  * g_free() after use
 191  */
 192 static gchar *migrate_query_status(QTestState *who)
 193 {
 194     QDict *rsp_return = migrate_query(who);
 195     gchar *status = g_strdup(qdict_get_str(rsp_return, "status"));
 196
 197     g_assert(status);
 198     qobject_unref(rsp_return);
 199
 200     return status;
 201 }
 202
 203 /*
 204  * It's tricky to use qemu's migration event capability with qtest,
 205  * events suddenly appearing confuse the qmp()/hmp() responses.
 206  */
 207
 208 static uint64_t get_migration_pass(QTestState *who)
 209 {
 210     QDict *rsp_return, *rsp_ram;
 211     uint64_t result;
 212
 213     rsp_return = migrate_query(who);
 214     if (!qdict_haskey(rsp_return, "ram")) {
 215         /* Still in setup */
 216         result = 0;
 217     } else {
 218         rsp_ram = qdict_get_qdict(rsp_return, "ram");
 219         result = qdict_get_try_int(rsp_ram, "dirty-sync-count", 0);
 220     }
 221     qobject_unref(rsp_return);
 222     return result;
 223 }
 224
 225 static void read_blocktime(QTestState *who)
 226 {
 227     QDict *rsp_return;
 228
 229     rsp_return = migrate_query(who);
 230     g_assert(qdict_haskey(rsp_return, "postcopy-blocktime"));
 231     qobject_unref(rsp_return);
 232 }
 233
 234 static void wait_for_migration_status(QTestState *who,
 235                                       const char *goal)
 236 {
 237     while (true) {
 238         bool completed;
 239         char *status;
 240
 241         status = migrate_query_status(who);
 242         completed = strcmp(status, goal) == 0;
 243         g_assert_cmpstr(status, !=,  "failed");
 244         g_free(status);
 245         if (completed) {
 246             return;
 247         }
 248         usleep(1000);
 249     }
 250 }
 251
 252 static void wait_for_migration_complete(QTestState *who)
 253 {
 254     wait_for_migration_status(who, "completed");
 255 }
 256
 257 static void wait_for_migration_pass(QTestState *who)
 258 {
 259     uint64_t initial_pass = get_migration_pass(who);
 260     uint64_t pass;
 261
 262     /* Wait for the 1st sync */
 263     while (!got_stop && !initial_pass) {
 264         usleep(1000);
 265         initial_pass = get_migration_pass(who);
 266     }
 267
 268     do {
 269         usleep(1000);
 270         pass = get_migration_pass(who);
 271     } while (pass == initial_pass && !got_stop);
 272 }
 273
 274 static void check_guests_ram(QTestState *who)
 275 {
 276     /* Our ASM test will have been incrementing one byte from each page from
 277      * 1MB to <100MB in order.
 278      * This gives us a constraint that any page's byte should be equal or less
 279      * than the previous pages byte (mod 256); and they should all be equal
 280      * except for one transition at the point where we meet the incrementer.
 281      * (We're running this with the guest stopped).
 282      */
 283     unsigned address;
 284     uint8_t first_byte;
 285     uint8_t last_byte;
 286     bool hit_edge = false;
 287     bool bad = false;
 288
 289     qtest_memread(who, start_address, &first_byte, 1);
 290     last_byte = first_byte;
 291
 292     for (address = start_address + 4096; address < end_address; address += 4096)
 293     {
 294         uint8_t b;
 295         qtest_memread(who, address, &b, 1);
 296         if (b != last_byte) {
 297             if (((b + 1) % 256) == last_byte && !hit_edge) {
 298                 /* This is OK, the guest stopped at the point of
 299                  * incrementing the previous page but didn't get
 300                  * to us yet.
 301                  */
 302                 hit_edge = true;
 303                 last_byte = b;
 304             } else {
 305                 fprintf(stderr, "Memory content inconsistency at %x"
 306                                 " first_byte = %x last_byte = %x current = %x"
 307                                 " hit_edge = %x\n",
 308                                 address, first_byte, last_byte, b, hit_edge);
 309                 bad = true;
 310             }
 311         }
 312     }
 313     g_assert_false(bad);
 314 }
 315
 316 static void cleanup(const char *filename)
 317 {
 318     char *path = g_strdup_printf("%s/%s", tmpfs, filename);
 319
 320     unlink(path);
 321     g_free(path);
 322 }
 323
 324 static void migrate_check_parameter(QTestState *who, const char *parameter,
 325                                     const char *value)
 326 {
 327     QDict *rsp, *rsp_return;
 328     char *result;
 329
 330     rsp = wait_command(who, "{ 'execute': 'query-migrate-parameters' }");
 331     rsp_return = qdict_get_qdict(rsp, "return");
 332     result = g_strdup_printf("%" PRId64,
 333                              qdict_get_try_int(rsp_return,  parameter, -1));
 334     g_assert_cmpstr(result, ==, value);
 335     g_free(result);
 336     qobject_unref(rsp);
 337 }
 338
 339 static void migrate_set_parameter(QTestState *who, const char *parameter,
 340                                   const char *value)
 341 {
 342     QDict *rsp;
 343     gchar *cmd;
 344
 345     cmd = g_strdup_printf("{ 'execute': 'migrate-set-parameters',"
 346                           "'arguments': { '%s': %s } }",
 347                           parameter, value);
 348     rsp = qtest_qmp(who, cmd);
 349     g_free(cmd);
 350     g_assert(qdict_haskey(rsp, "return"));
 351     qobject_unref(rsp);
 352     migrate_check_parameter(who, parameter, value);
 353 }
 354
 355 static void migrate_pause(QTestState *who)
 356 {
 357     QDict *rsp;
 358
 359     rsp = wait_command(who, "{ 'execute': 'migrate-pause' }");
 360     g_assert(qdict_haskey(rsp, "return"));
 361     qobject_unref(rsp);
 362 }
 363
 364 static void migrate_recover(QTestState *who, const char *uri)
 365 {
 366     QDict *rsp;
 367     gchar *cmd = g_strdup_printf(
 368         "{ 'execute': 'migrate-recover', "
 369         "  'id': 'recover-cmd', "
 370         "  'arguments': { 'uri': '%s' } }", uri);
 371
 372     rsp = wait_command(who, cmd);
 373     g_assert(qdict_haskey(rsp, "return"));
 374     g_free(cmd);
 375     qobject_unref(rsp);
 376 }
 377
 378 static void migrate_set_capability(QTestState *who, const char *capability,
 379                                    const char *value)
 380 {
 381     QDict *rsp;
 382     gchar *cmd;
 383
 384     cmd = g_strdup_printf("{ 'execute': 'migrate-set-capabilities',"
 385                           "'arguments': { "
 386                           "'capabilities': [ { "
 387                           "'capability': '%s', 'state': %s } ] } }",
 388                           capability, value);
 389     rsp = qtest_qmp(who, cmd);
 390     g_free(cmd);
 391     g_assert(qdict_haskey(rsp, "return"));
 392     qobject_unref(rsp);
 393 }
 394
 395 static void migrate(QTestState *who, const char *uri, const char *extra)
 396 {
 397     QDict *rsp;
 398     gchar *cmd;
 399
 400     cmd = g_strdup_printf("{ 'execute': 'migrate',"
 401                           "  'arguments': { 'uri': '%s' %s } }",
 402                           uri, extra ? extra : "");
 403     rsp = qtest_qmp(who, cmd);
 404     g_free(cmd);
 405     g_assert(qdict_haskey(rsp, "return"));
 406     qobject_unref(rsp);
 407 }
 408
 409 static void migrate_postcopy_start(QTestState *from, QTestState *to)
 410 {
 411     QDict *rsp;
 412
 413     rsp = wait_command(from, "{ 'execute': 'migrate-start-postcopy' }");
 414     g_assert(qdict_haskey(rsp, "return"));
 415     qobject_unref(rsp);
 416
 417     if (!got_stop) {
 418         qtest_qmp_eventwait(from, "STOP");
 419     }
 420
 421     qtest_qmp_eventwait(to, "RESUME");
 422 }
 423
 424 static int test_migrate_start(QTestState **from, QTestState **to,
 425                                const char *uri, bool hide_stderr)
 426 {
 427     gchar *cmd_src, *cmd_dst;
 428     char *bootpath = g_strdup_printf("%s/bootsect", tmpfs);
 429     const char *arch = qtest_get_arch();
 430     const char *accel = "kvm:tcg";
 431
 432     got_stop = false;
 433
 434     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
 435         init_bootfile_x86(bootpath);
 436         cmd_src = g_strdup_printf("-machine accel=%s -m 150M"
 437                                   " -name source,debug-threads=on"
 438                                   " -serial file:%s/src_serial"
 439                                   " -drive file=%s,format=raw",
 440                                   accel, tmpfs, bootpath);
 441         cmd_dst = g_strdup_printf("-machine accel=%s -m 150M"
 442                                   " -name target,debug-threads=on"
 443                                   " -serial file:%s/dest_serial"
 444                                   " -drive file=%s,format=raw"
 445                                   " -incoming %s",
 446                                   accel, tmpfs, bootpath, uri);
 447     } else if (strcmp(arch, "ppc64") == 0) {
 448
 449         /* On ppc64, the test only works with kvm-hv, but not with kvm-pr
 450          * and TCG is touchy due to race conditions on dirty bits
 451          * (especially on PPC for some reason)
 452          */
 453         if (access("/sys/module/kvm_hv", F_OK)) {
 454             g_print("Skipping test: kvm_hv not available ");
 455             return -1;
 456         }
 457         cmd_src = g_strdup_printf("-machine accel=%s -m 256M"
 458                                   " -name source,debug-threads=on"
 459                                   " -serial file:%s/src_serial"
 460                                   " -prom-env '"
 461                                   "boot-command=hex .\" _\" begin %x %x "
 462                                   "do i c@ 1 + i c! 1000 +loop .\" B\" 0 "
 463                                   "until'",  accel, tmpfs, end_address,
 464                                   start_address);
 465         cmd_dst = g_strdup_printf("-machine accel=%s -m 256M"
 466                                   " -name target,debug-threads=on"
 467                                   " -serial file:%s/dest_serial"
 468                                   " -incoming %s",
 469                                   accel, tmpfs, uri);
 470     } else {
 471         g_assert_not_reached();
 472     }
 473
 474     g_free(bootpath);
 475
 476     if (hide_stderr) {
 477         gchar *tmp;
 478         tmp = g_strdup_printf("%s 2>/dev/null", cmd_src);
 479         g_free(cmd_src);
 480         cmd_src = tmp;
 481
 482         tmp = g_strdup_printf("%s 2>/dev/null", cmd_dst);
 483         g_free(cmd_dst);
 484         cmd_dst = tmp;
 485     }
 486
 487     *from = qtest_start(cmd_src);
 488     g_free(cmd_src);
 489
 490     *to = qtest_init(cmd_dst);
 491     g_free(cmd_dst);
 492     return 0;
 493 }
 494
 495 static void test_migrate_end(QTestState *from, QTestState *to, bool test_dest)
 496 {
 497     unsigned char dest_byte_a, dest_byte_b, dest_byte_c, dest_byte_d;
 498
 499     qtest_quit(from);
 500
 501     if (test_dest) {
 502         qtest_memread(to, start_address, &dest_byte_a, 1);
 503
 504         /* Destination still running, wait for a byte to change */
 505         do {
 506             qtest_memread(to, start_address, &dest_byte_b, 1);
 507             usleep(1000 * 10);
 508         } while (dest_byte_a == dest_byte_b);
 509
 510         qtest_qmp_discard_response(to, "{ 'execute' : 'stop'}");
 511
 512         /* With it stopped, check nothing changes */
 513         qtest_memread(to, start_address, &dest_byte_c, 1);
 514         usleep(1000 * 200);
 515         qtest_memread(to, start_address, &dest_byte_d, 1);
 516         g_assert_cmpint(dest_byte_c, ==, dest_byte_d);
 517
 518         check_guests_ram(to);
 519     }
 520
 521     qtest_quit(to);
 522
 523     cleanup("bootsect");
 524     cleanup("migsocket");
 525     cleanup("src_serial");
 526     cleanup("dest_serial");
 527 }
 528
 529 static void deprecated_set_downtime(QTestState *who, const double value)
 530 {
 531     QDict *rsp;
 532     gchar *cmd;
 533     char *expected;
 534     int64_t result_int;
 535
 536     cmd = g_strdup_printf("{ 'execute': 'migrate_set_downtime',"
 537                           "'arguments': { 'value': %g } }", value);
 538     rsp = qtest_qmp(who, cmd);
 539     g_free(cmd);
 540     g_assert(qdict_haskey(rsp, "return"));
 541     qobject_unref(rsp);
 542     result_int = value * 1000L;
 543     expected = g_strdup_printf("%" PRId64, result_int);
 544     migrate_check_parameter(who, "downtime-limit", expected);
 545     g_free(expected);
 546 }
 547
 548 static void deprecated_set_speed(QTestState *who, const char *value)
 549 {
 550     QDict *rsp;
 551     gchar *cmd;
 552
 553     cmd = g_strdup_printf("{ 'execute': 'migrate_set_speed',"
 554                           "'arguments': { 'value': %s } }", value);
 555     rsp = qtest_qmp(who, cmd);
 556     g_free(cmd);
 557     g_assert(qdict_haskey(rsp, "return"));
 558     qobject_unref(rsp);
 559     migrate_check_parameter(who, "max-bandwidth", value);
 560 }
 561
 562 static void test_deprecated(void)
 563 {
 564     QTestState *from;
 565
 566     from = qtest_start("");
 567
 568     deprecated_set_downtime(from, 0.12345);
 569     deprecated_set_speed(from, "12345");
 570
 571     qtest_quit(from);
 572 }
 573
 574 static int migrate_postcopy_prepare(QTestState **from_ptr,
 575                                      QTestState **to_ptr,
 576                                      bool hide_error)
 577 {
 578     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 579     QTestState *from, *to;
 580
 581     if (test_migrate_start(&from, &to, uri, hide_error)) {
 582         return -1;
 583     }
 584
 585     migrate_set_capability(from, "postcopy-ram", "true");
 586     migrate_set_capability(to, "postcopy-ram", "true");
 587     migrate_set_capability(to, "postcopy-blocktime", "true");
 588
 589     /* We want to pick a speed slow enough that the test completes
 590      * quickly, but that it doesn't complete precopy even on a slow
 591      * machine, so also set the downtime.
 592      */
 593     migrate_set_parameter(from, "max-bandwidth", "100000000");
 594     migrate_set_parameter(from, "downtime-limit", "1");
 595
 596     /* Wait for the first serial output from the source */
 597     wait_for_serial("src_serial");
 598
 599     migrate(from, uri, NULL);
 600     g_free(uri);
 601
 602     wait_for_migration_pass(from);
 603
 604     *from_ptr = from;
 605     *to_ptr = to;
 606
 607     return 0;
 608 }
 609
 610 static void migrate_postcopy_complete(QTestState *from, QTestState *to)
 611 {
 612     wait_for_migration_complete(from);
 613
 614     /* Make sure we get at least one "B" on destination */
 615     wait_for_serial("dest_serial");
 616
 617     if (uffd_feature_thread_id) {
 618         read_blocktime(to);
 619     }
 620
 621     test_migrate_end(from, to, true);
 622 }
 623
 624 static void test_postcopy(void)
 625 {
 626     QTestState *from, *to;
 627
 628     if (migrate_postcopy_prepare(&from, &to, false)) {
 629         return;
 630     }
 631     migrate_postcopy_start(from, to);
 632     migrate_postcopy_complete(from, to);
 633 }
 634
 635 static void test_postcopy_recovery(void)
 636 {
 637     QTestState *from, *to;
 638     char *uri;
 639
 640     if (migrate_postcopy_prepare(&from, &to, true)) {
 641         return;
 642     }
 643
 644     /* Turn postcopy speed down, 4K/s is slow enough on any machines */
 645     migrate_set_parameter(from, "max-postcopy-bandwidth", "4096");
 646
 647     /* Now we start the postcopy */
 648     migrate_postcopy_start(from, to);
 649
 650     /*
 651      * Wait until postcopy is really started; we can only run the
 652      * migrate-pause command during a postcopy
 653      */
 654     wait_for_migration_status(from, "postcopy-active");
 655
 656     /*
 657      * Manually stop the postcopy migration. This emulates a network
 658      * failure with the migration socket
 659      */
 660     migrate_pause(from);
 661
 662     /*
 663      * Wait for destination side to reach postcopy-paused state.  The
 664      * migrate-recover command can only succeed if destination machine
 665      * is in the paused state
 666      */
 667     wait_for_migration_status(to, "postcopy-paused");
 668
 669     /*
 670      * Create a new socket to emulate a new channel that is different
 671      * from the broken migration channel; tell the destination to
 672      * listen to the new port
 673      */
 674     uri = g_strdup_printf("unix:%s/migsocket-recover", tmpfs);
 675     migrate_recover(to, uri);
 676
 677     /*
 678      * Try to rebuild the migration channel using the resume flag and
 679      * the newly created channel
 680      */
 681     wait_for_migration_status(from, "postcopy-paused");
 682     migrate(from, uri, ", 'resume': true");
 683     g_free(uri);
 684
 685     /* Restore the postcopy bandwidth to unlimited */
 686     migrate_set_parameter(from, "max-postcopy-bandwidth", "0");
 687
 688     migrate_postcopy_complete(from, to);
 689 }
 690
 691 static void test_baddest(void)
 692 {
 693     QTestState *from, *to;
 694     QDict *rsp, *rsp_return;
 695     char *status;
 696     bool failed;
 697
 698     if (test_migrate_start(&from, &to, "tcp:0:0", true)) {
 699         return;
 700     }
 701     migrate(from, "tcp:0:0", NULL);
 702     do {
 703         status = migrate_query_status(from);
 704         g_assert(!strcmp(status, "setup") || !(strcmp(status, "failed")));
 705         failed = !strcmp(status, "failed");
 706         g_free(status);
 707     } while (!failed);
 708
 709     /* Is the machine currently running? */
 710     rsp = wait_command(from, "{ 'execute': 'query-status' }");
 711     g_assert(qdict_haskey(rsp, "return"));
 712     rsp_return = qdict_get_qdict(rsp, "return");
 713     g_assert(qdict_haskey(rsp_return, "running"));
 714     g_assert(qdict_get_bool(rsp_return, "running"));
 715     qobject_unref(rsp);
 716
 717     test_migrate_end(from, to, false);
 718 }
 719
 720 static void test_precopy_unix(void)
 721 {
 722     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 723     QTestState *from, *to;
 724
 725     if (test_migrate_start(&from, &to, uri, false)) {
 726         return;
 727     }
 728
 729     /* We want to pick a speed slow enough that the test completes
 730      * quickly, but that it doesn't complete precopy even on a slow
 731      * machine, so also set the downtime.
 732      */
 733     /* 1 ms should make it not converge*/
 734     migrate_set_parameter(from, "downtime-limit", "1");
 735     /* 1GB/s */
 736     migrate_set_parameter(from, "max-bandwidth", "1000000000");
 737
 738     /* Wait for the first serial output from the source */
 739     wait_for_serial("src_serial");
 740
 741     migrate(from, uri, NULL);
 742
 743     wait_for_migration_pass(from);
 744
 745     /* 300 ms should converge */
 746     migrate_set_parameter(from, "downtime-limit", "300");
 747
 748     if (!got_stop) {
 749         qtest_qmp_eventwait(from, "STOP");
 750     }
 751
 752     qtest_qmp_eventwait(to, "RESUME");
 753
 754     wait_for_serial("dest_serial");
 755     wait_for_migration_complete(from);
 756
 757     test_migrate_end(from, to, true);
 758     g_free(uri);
 759 }
 760
 761 int main(int argc, char **argv)
 762 {
 763     char template[] = "/tmp/migration-test-XXXXXX";
 764     int ret;
 765
 766     g_test_init(&argc, &argv, NULL);
 767
 768     if (!ufd_version_check()) {
 769         return 0;
 770     }
 771
 772     tmpfs = mkdtemp(template);
 773     if (!tmpfs) {
 774         g_test_message("mkdtemp on path (%s): %s\n", template, strerror(errno));
 775     }
 776     g_assert(tmpfs);
 777
 778     module_call_init(MODULE_INIT_QOM);
 779
 780     qtest_add_func("/migration/postcopy/unix", test_postcopy);
 781     qtest_add_func("/migration/postcopy/recovery", test_postcopy_recovery);
 782     qtest_add_func("/migration/deprecated", test_deprecated);
 783     qtest_add_func("/migration/bad_dest", test_baddest);
 784     qtest_add_func("/migration/precopy/unix", test_precopy_unix);
 785
 786     ret = g_test_run();
 787
 788     g_assert_cmpint(ret, ==, 0);
 789
 790     ret = rmdir(tmpfs);
 791     if (ret != 0) {
 792         g_test_message("unable to rmdir: path (%s): %s\n",
 793                        tmpfs, strerror(errno));
 794     }
 795
 796     return ret;
 797 }