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 "qapi/qmp/qjson.h"
  18 #include "qemu/option.h"
  19 #include "qemu/range.h"
  20 #include "qemu/sockets.h"
  21 #include "chardev/char.h"
  22 #include "sysemu/sysemu.h"
  23
  24 #include "migration/migration-test.h"
  25
  26 /* TODO actually test the results and get rid of this */
  27 #define qtest_qmp_discard_response(...) qobject_unref(qtest_qmp(__VA_ARGS__))
  28
  29 unsigned start_address;
  30 unsigned end_address;
  31 bool got_stop;
  32 static bool uffd_feature_thread_id;
  33
  34 #if defined(__linux__)
  35 #include <sys/syscall.h>
  36 #include <sys/vfs.h>
  37 #endif
  38
  39 #if defined(__linux__) && defined(__NR_userfaultfd) && defined(CONFIG_EVENTFD)
  40 #include <sys/eventfd.h>
  41 #include <sys/ioctl.h>
  42 #include <linux/userfaultfd.h>
  43
  44 static bool ufd_version_check(void)
  45 {
  46     struct uffdio_api api_struct;
  47     uint64_t ioctl_mask;
  48
  49     int ufd = syscall(__NR_userfaultfd, O_CLOEXEC);
  50
  51     if (ufd == -1) {
  52         g_test_message("Skipping test: userfaultfd not available");
  53         return false;
  54     }
  55
  56     api_struct.api = UFFD_API;
  57     api_struct.features = 0;
  58     if (ioctl(ufd, UFFDIO_API, &api_struct)) {
  59         g_test_message("Skipping test: UFFDIO_API failed");
  60         return false;
  61     }
  62     uffd_feature_thread_id = api_struct.features & UFFD_FEATURE_THREAD_ID;
  63
  64     ioctl_mask = (__u64)1 << _UFFDIO_REGISTER |
  65                  (__u64)1 << _UFFDIO_UNREGISTER;
  66     if ((api_struct.ioctls & ioctl_mask) != ioctl_mask) {
  67         g_test_message("Skipping test: Missing userfault feature");
  68         return false;
  69     }
  70
  71     return true;
  72 }
  73
  74 #else
  75 static bool ufd_version_check(void)
  76 {
  77     g_test_message("Skipping test: Userfault not available (builtdtime)");
  78     return false;
  79 }
  80
  81 #endif
  82
  83 static const char *tmpfs;
  84
  85 /* The boot file modifies memory area in [start_address, end_address)
  86  * repeatedly. It outputs a 'B' at a fixed rate while it's still running.
  87  */
  88 #include "tests/migration/i386/a-b-bootblock.h"
  89
  90 static void init_bootfile_x86(const char *bootpath)
  91 {
  92     FILE *bootfile = fopen(bootpath, "wb");
  93
  94     g_assert_cmpint(fwrite(x86_bootsect, 512, 1, bootfile), ==, 1);
  95     fclose(bootfile);
  96 }
  97
  98 /*
  99  * Wait for some output in the serial output file,
 100  * we get an 'A' followed by an endless string of 'B's
 101  * but on the destination we won't have the A.
 102  */
 103 static void wait_for_serial(const char *side)
 104 {
 105     char *serialpath = g_strdup_printf("%s/%s", tmpfs, side);
 106     FILE *serialfile = fopen(serialpath, "r");
 107     const char *arch = qtest_get_arch();
 108     int started = (strcmp(side, "src_serial") == 0 &&
 109                    strcmp(arch, "ppc64") == 0) ? 0 : 1;
 110
 111     g_free(serialpath);
 112     do {
 113         int readvalue = fgetc(serialfile);
 114
 115         if (!started) {
 116             /* SLOF prints its banner before starting test,
 117              * to ignore it, mark the start of the test with '_',
 118              * ignore all characters until this marker
 119              */
 120             switch (readvalue) {
 121             case '_':
 122                 started = 1;
 123                 break;
 124             case EOF:
 125                 fseek(serialfile, 0, SEEK_SET);
 126                 usleep(1000);
 127                 break;
 128             }
 129             continue;
 130         }
 131         switch (readvalue) {
 132         case 'A':
 133             /* Fine */
 134             break;
 135
 136         case 'B':
 137             /* It's alive! */
 138             fclose(serialfile);
 139             return;
 140
 141         case EOF:
 142             started = (strcmp(side, "src_serial") == 0 &&
 143                        strcmp(arch, "ppc64") == 0) ? 0 : 1;
 144             fseek(serialfile, 0, SEEK_SET);
 145             usleep(1000);
 146             break;
 147
 148         default:
 149             fprintf(stderr, "Unexpected %d on %s serial\n", readvalue, side);
 150             g_assert_not_reached();
 151         }
 152     } while (true);
 153 }
 154
 155 static void stop_cb(void *opaque, const char *name, QDict *data)
 156 {
 157     if (!strcmp(name, "STOP")) {
 158         got_stop = true;
 159     }
 160 }
 161
 162 /*
 163  * Events can get in the way of responses we are actually waiting for.
 164  */
 165 GCC_FMT_ATTR(2, 3)
 166 static QDict *wait_command(QTestState *who, const char *command, ...)
 167 {
 168     va_list ap;
 169
 170     va_start(ap, command);
 171     qtest_qmp_vsend(who, command, ap);
 172     va_end(ap);
 173
 174     return qtest_qmp_receive_success(who, stop_cb, NULL);
 175 }
 176
 177 /*
 178  * Note: caller is responsible to free the returned object via
 179  * qobject_unref() after use
 180  */
 181 static QDict *migrate_query(QTestState *who)
 182 {
 183     return wait_command(who, "{ 'execute': 'query-migrate' }");
 184 }
 185
 186 /*
 187  * Note: caller is responsible to free the returned object via
 188  * g_free() after use
 189  */
 190 static gchar *migrate_query_status(QTestState *who)
 191 {
 192     QDict *rsp_return = migrate_query(who);
 193     gchar *status = g_strdup(qdict_get_str(rsp_return, "status"));
 194
 195     g_assert(status);
 196     qobject_unref(rsp_return);
 197
 198     return status;
 199 }
 200
 201 /*
 202  * It's tricky to use qemu's migration event capability with qtest,
 203  * events suddenly appearing confuse the qmp()/hmp() responses.
 204  */
 205
 206 static uint64_t get_migration_pass(QTestState *who)
 207 {
 208     QDict *rsp_return, *rsp_ram;
 209     uint64_t result;
 210
 211     rsp_return = migrate_query(who);
 212     if (!qdict_haskey(rsp_return, "ram")) {
 213         /* Still in setup */
 214         result = 0;
 215     } else {
 216         rsp_ram = qdict_get_qdict(rsp_return, "ram");
 217         result = qdict_get_try_int(rsp_ram, "dirty-sync-count", 0);
 218     }
 219     qobject_unref(rsp_return);
 220     return result;
 221 }
 222
 223 static void read_blocktime(QTestState *who)
 224 {
 225     QDict *rsp_return;
 226
 227     rsp_return = migrate_query(who);
 228     g_assert(qdict_haskey(rsp_return, "postcopy-blocktime"));
 229     qobject_unref(rsp_return);
 230 }
 231
 232 static void wait_for_migration_status(QTestState *who,
 233                                       const char *goal)
 234 {
 235     while (true) {
 236         bool completed;
 237         char *status;
 238
 239         status = migrate_query_status(who);
 240         completed = strcmp(status, goal) == 0;
 241         g_assert_cmpstr(status, !=,  "failed");
 242         g_free(status);
 243         if (completed) {
 244             return;
 245         }
 246         usleep(1000);
 247     }
 248 }
 249
 250 static void wait_for_migration_complete(QTestState *who)
 251 {
 252     wait_for_migration_status(who, "completed");
 253 }
 254
 255 static void wait_for_migration_pass(QTestState *who)
 256 {
 257     uint64_t initial_pass = get_migration_pass(who);
 258     uint64_t pass;
 259
 260     /* Wait for the 1st sync */
 261     while (!got_stop && !initial_pass) {
 262         usleep(1000);
 263         initial_pass = get_migration_pass(who);
 264     }
 265
 266     do {
 267         usleep(1000);
 268         pass = get_migration_pass(who);
 269     } while (pass == initial_pass && !got_stop);
 270 }
 271
 272 static void check_guests_ram(QTestState *who)
 273 {
 274     /* Our ASM test will have been incrementing one byte from each page from
 275      * start_address to < end_address in order. This gives us a constraint
 276      * that any page's byte should be equal or less than the previous pages
 277      * byte (mod 256); and they should all be equal except for one transition
 278      * at the point where we meet the incrementer. (We're running this with
 279      * the guest stopped).
 280      */
 281     unsigned address;
 282     uint8_t first_byte;
 283     uint8_t last_byte;
 284     bool hit_edge = false;
 285     bool bad = false;
 286
 287     qtest_memread(who, start_address, &first_byte, 1);
 288     last_byte = first_byte;
 289
 290     for (address = start_address + TEST_MEM_PAGE_SIZE; address < end_address;
 291          address += TEST_MEM_PAGE_SIZE)
 292     {
 293         uint8_t b;
 294         qtest_memread(who, address, &b, 1);
 295         if (b != last_byte) {
 296             if (((b + 1) % 256) == last_byte && !hit_edge) {
 297                 /* This is OK, the guest stopped at the point of
 298                  * incrementing the previous page but didn't get
 299                  * to us yet.
 300                  */
 301                 hit_edge = true;
 302                 last_byte = b;
 303             } else {
 304                 fprintf(stderr, "Memory content inconsistency at %x"
 305                                 " first_byte = %x last_byte = %x current = %x"
 306                                 " hit_edge = %x\n",
 307                                 address, first_byte, last_byte, b, hit_edge);
 308                 bad = true;
 309             }
 310         }
 311     }
 312     g_assert_false(bad);
 313 }
 314
 315 static void cleanup(const char *filename)
 316 {
 317     char *path = g_strdup_printf("%s/%s", tmpfs, filename);
 318
 319     unlink(path);
 320     g_free(path);
 321 }
 322
 323 static void migrate_check_parameter(QTestState *who, const char *parameter,
 324                                     long long value)
 325 {
 326     QDict *rsp_return;
 327
 328     rsp_return = wait_command(who,
 329                               "{ 'execute': 'query-migrate-parameters' }");
 330     g_assert_cmpint(qdict_get_int(rsp_return, parameter), ==, value);
 331     qobject_unref(rsp_return);
 332 }
 333
 334 static void migrate_set_parameter(QTestState *who, const char *parameter,
 335                                   long long value)
 336 {
 337     QDict *rsp;
 338
 339     rsp = qtest_qmp(who,
 340                     "{ 'execute': 'migrate-set-parameters',"
 341                     "'arguments': { %s: %lld } }",
 342                     parameter, value);
 343     g_assert(qdict_haskey(rsp, "return"));
 344     qobject_unref(rsp);
 345     migrate_check_parameter(who, parameter, value);
 346 }
 347
 348 static void migrate_pause(QTestState *who)
 349 {
 350     QDict *rsp;
 351
 352     rsp = wait_command(who, "{ 'execute': 'migrate-pause' }");
 353     qobject_unref(rsp);
 354 }
 355
 356 static void migrate_recover(QTestState *who, const char *uri)
 357 {
 358     QDict *rsp;
 359
 360     rsp = wait_command(who,
 361                        "{ 'execute': 'migrate-recover', "
 362                        "  'id': 'recover-cmd', "
 363                        "  'arguments': { 'uri': %s } }",
 364                        uri);
 365     qobject_unref(rsp);
 366 }
 367
 368 static void migrate_set_capability(QTestState *who, const char *capability,
 369                                    bool value)
 370 {
 371     QDict *rsp;
 372
 373     rsp = qtest_qmp(who,
 374                     "{ 'execute': 'migrate-set-capabilities',"
 375                     "'arguments': { "
 376                     "'capabilities': [ { "
 377                     "'capability': %s, 'state': %i } ] } }",
 378                     capability, value);
 379     g_assert(qdict_haskey(rsp, "return"));
 380     qobject_unref(rsp);
 381 }
 382
 383 /*
 384  * Send QMP command "migrate".
 385  * Arguments are built from @fmt... (formatted like
 386  * qobject_from_jsonf_nofail()) with "uri": @uri spliced in.
 387  */
 388 GCC_FMT_ATTR(3, 4)
 389 static void migrate(QTestState *who, const char *uri, const char *fmt, ...)
 390 {
 391     va_list ap;
 392     QDict *args, *rsp;
 393
 394     va_start(ap, fmt);
 395     args = qdict_from_vjsonf_nofail(fmt, ap);
 396     va_end(ap);
 397
 398     g_assert(!qdict_haskey(args, "uri"));
 399     qdict_put_str(args, "uri", uri);
 400
 401     rsp = qmp("{ 'execute': 'migrate', 'arguments': %p}", args);
 402     g_assert(qdict_haskey(rsp, "return"));
 403     qobject_unref(rsp);
 404 }
 405
 406 static void migrate_postcopy_start(QTestState *from, QTestState *to)
 407 {
 408     QDict *rsp;
 409
 410     rsp = wait_command(from, "{ 'execute': 'migrate-start-postcopy' }");
 411     qobject_unref(rsp);
 412
 413     if (!got_stop) {
 414         qtest_qmp_eventwait(from, "STOP");
 415     }
 416
 417     qtest_qmp_eventwait(to, "RESUME");
 418 }
 419
 420 static int test_migrate_start(QTestState **from, QTestState **to,
 421                                const char *uri, bool hide_stderr)
 422 {
 423     gchar *cmd_src, *cmd_dst;
 424     char *bootpath = g_strdup_printf("%s/bootsect", tmpfs);
 425     const char *arch = qtest_get_arch();
 426     const char *accel = "kvm:tcg";
 427
 428     got_stop = false;
 429
 430     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
 431         init_bootfile_x86(bootpath);
 432         cmd_src = g_strdup_printf("-machine accel=%s -m 150M"
 433                                   " -name source,debug-threads=on"
 434                                   " -serial file:%s/src_serial"
 435                                   " -drive file=%s,format=raw",
 436                                   accel, tmpfs, bootpath);
 437         cmd_dst = g_strdup_printf("-machine accel=%s -m 150M"
 438                                   " -name target,debug-threads=on"
 439                                   " -serial file:%s/dest_serial"
 440                                   " -drive file=%s,format=raw"
 441                                   " -incoming %s",
 442                                   accel, tmpfs, bootpath, uri);
 443         start_address = X86_TEST_MEM_START;
 444         end_address = X86_TEST_MEM_END;
 445     } else if (strcmp(arch, "ppc64") == 0) {
 446         cmd_src = g_strdup_printf("-machine accel=%s -m 256M -nodefaults"
 447                                   " -name source,debug-threads=on"
 448                                   " -serial file:%s/src_serial"
 449                                   " -prom-env 'use-nvramrc?=true' -prom-env "
 450                                   "'nvramrc=hex .\" _\" begin %x %x "
 451                                   "do i c@ 1 + i c! 1000 +loop .\" B\" 0 "
 452                                   "until'",  accel, tmpfs, end_address,
 453                                   start_address);
 454         cmd_dst = g_strdup_printf("-machine accel=%s -m 256M"
 455                                   " -name target,debug-threads=on"
 456                                   " -serial file:%s/dest_serial"
 457                                   " -incoming %s",
 458                                   accel, tmpfs, uri);
 459
 460         start_address = PPC_TEST_MEM_START;
 461         end_address = PPC_TEST_MEM_END;
 462     } else {
 463         g_assert_not_reached();
 464     }
 465
 466     g_free(bootpath);
 467
 468     if (hide_stderr) {
 469         gchar *tmp;
 470         tmp = g_strdup_printf("%s 2>/dev/null", cmd_src);
 471         g_free(cmd_src);
 472         cmd_src = tmp;
 473
 474         tmp = g_strdup_printf("%s 2>/dev/null", cmd_dst);
 475         g_free(cmd_dst);
 476         cmd_dst = tmp;
 477     }
 478
 479     *from = qtest_start(cmd_src);
 480     g_free(cmd_src);
 481
 482     *to = qtest_init(cmd_dst);
 483     g_free(cmd_dst);
 484     return 0;
 485 }
 486
 487 static void test_migrate_end(QTestState *from, QTestState *to, bool test_dest)
 488 {
 489     unsigned char dest_byte_a, dest_byte_b, dest_byte_c, dest_byte_d;
 490
 491     qtest_quit(from);
 492
 493     if (test_dest) {
 494         qtest_memread(to, start_address, &dest_byte_a, 1);
 495
 496         /* Destination still running, wait for a byte to change */
 497         do {
 498             qtest_memread(to, start_address, &dest_byte_b, 1);
 499             usleep(1000 * 10);
 500         } while (dest_byte_a == dest_byte_b);
 501
 502         qtest_qmp_discard_response(to, "{ 'execute' : 'stop'}");
 503
 504         /* With it stopped, check nothing changes */
 505         qtest_memread(to, start_address, &dest_byte_c, 1);
 506         usleep(1000 * 200);
 507         qtest_memread(to, start_address, &dest_byte_d, 1);
 508         g_assert_cmpint(dest_byte_c, ==, dest_byte_d);
 509
 510         check_guests_ram(to);
 511     }
 512
 513     qtest_quit(to);
 514
 515     cleanup("bootsect");
 516     cleanup("migsocket");
 517     cleanup("src_serial");
 518     cleanup("dest_serial");
 519 }
 520
 521 static void deprecated_set_downtime(QTestState *who, const double value)
 522 {
 523     QDict *rsp;
 524
 525     rsp = qtest_qmp(who,
 526                     "{ 'execute': 'migrate_set_downtime',"
 527                     " 'arguments': { 'value': %f } }", value);
 528     g_assert(qdict_haskey(rsp, "return"));
 529     qobject_unref(rsp);
 530     migrate_check_parameter(who, "downtime-limit", value * 1000);
 531 }
 532
 533 static void deprecated_set_speed(QTestState *who, long long value)
 534 {
 535     QDict *rsp;
 536
 537     rsp = qtest_qmp(who, "{ 'execute': 'migrate_set_speed',"
 538                           "'arguments': { 'value': %lld } }", value);
 539     g_assert(qdict_haskey(rsp, "return"));
 540     qobject_unref(rsp);
 541     migrate_check_parameter(who, "max-bandwidth", value);
 542 }
 543
 544 static void test_deprecated(void)
 545 {
 546     QTestState *from;
 547
 548     from = qtest_start("");
 549
 550     deprecated_set_downtime(from, 0.12345);
 551     deprecated_set_speed(from, 12345);
 552
 553     qtest_quit(from);
 554 }
 555
 556 static int migrate_postcopy_prepare(QTestState **from_ptr,
 557                                      QTestState **to_ptr,
 558                                      bool hide_error)
 559 {
 560     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 561     QTestState *from, *to;
 562
 563     if (test_migrate_start(&from, &to, uri, hide_error)) {
 564         return -1;
 565     }
 566
 567     migrate_set_capability(from, "postcopy-ram", true);
 568     migrate_set_capability(to, "postcopy-ram", true);
 569     migrate_set_capability(to, "postcopy-blocktime", true);
 570
 571     /* We want to pick a speed slow enough that the test completes
 572      * quickly, but that it doesn't complete precopy even on a slow
 573      * machine, so also set the downtime.
 574      */
 575     migrate_set_parameter(from, "max-bandwidth", 100000000);
 576     migrate_set_parameter(from, "downtime-limit", 1);
 577
 578     /* Wait for the first serial output from the source */
 579     wait_for_serial("src_serial");
 580
 581     migrate(from, uri, "{}");
 582     g_free(uri);
 583
 584     wait_for_migration_pass(from);
 585
 586     *from_ptr = from;
 587     *to_ptr = to;
 588
 589     return 0;
 590 }
 591
 592 static void migrate_postcopy_complete(QTestState *from, QTestState *to)
 593 {
 594     wait_for_migration_complete(from);
 595
 596     /* Make sure we get at least one "B" on destination */
 597     wait_for_serial("dest_serial");
 598
 599     if (uffd_feature_thread_id) {
 600         read_blocktime(to);
 601     }
 602
 603     test_migrate_end(from, to, true);
 604 }
 605
 606 static void test_postcopy(void)
 607 {
 608     QTestState *from, *to;
 609
 610     if (migrate_postcopy_prepare(&from, &to, false)) {
 611         return;
 612     }
 613     migrate_postcopy_start(from, to);
 614     migrate_postcopy_complete(from, to);
 615 }
 616
 617 static void test_postcopy_recovery(void)
 618 {
 619     QTestState *from, *to;
 620     char *uri;
 621
 622     if (migrate_postcopy_prepare(&from, &to, true)) {
 623         return;
 624     }
 625
 626     /* Turn postcopy speed down, 4K/s is slow enough on any machines */
 627     migrate_set_parameter(from, "max-postcopy-bandwidth", 4096);
 628
 629     /* Now we start the postcopy */
 630     migrate_postcopy_start(from, to);
 631
 632     /*
 633      * Wait until postcopy is really started; we can only run the
 634      * migrate-pause command during a postcopy
 635      */
 636     wait_for_migration_status(from, "postcopy-active");
 637
 638     /*
 639      * Manually stop the postcopy migration. This emulates a network
 640      * failure with the migration socket
 641      */
 642     migrate_pause(from);
 643
 644     /*
 645      * Wait for destination side to reach postcopy-paused state.  The
 646      * migrate-recover command can only succeed if destination machine
 647      * is in the paused state
 648      */
 649     wait_for_migration_status(to, "postcopy-paused");
 650
 651     /*
 652      * Create a new socket to emulate a new channel that is different
 653      * from the broken migration channel; tell the destination to
 654      * listen to the new port
 655      */
 656     uri = g_strdup_printf("unix:%s/migsocket-recover", tmpfs);
 657     migrate_recover(to, uri);
 658
 659     /*
 660      * Try to rebuild the migration channel using the resume flag and
 661      * the newly created channel
 662      */
 663     wait_for_migration_status(from, "postcopy-paused");
 664     migrate(from, uri, "{'resume': true}");
 665     g_free(uri);
 666
 667     /* Restore the postcopy bandwidth to unlimited */
 668     migrate_set_parameter(from, "max-postcopy-bandwidth", 0);
 669
 670     migrate_postcopy_complete(from, to);
 671 }
 672
 673 static void test_baddest(void)
 674 {
 675     QTestState *from, *to;
 676     QDict *rsp_return;
 677     char *status;
 678     bool failed;
 679
 680     if (test_migrate_start(&from, &to, "tcp:0:0", true)) {
 681         return;
 682     }
 683     migrate(from, "tcp:0:0", "{}");
 684     do {
 685         status = migrate_query_status(from);
 686         g_assert(!strcmp(status, "setup") || !(strcmp(status, "failed")));
 687         failed = !strcmp(status, "failed");
 688         g_free(status);
 689     } while (!failed);
 690
 691     /* Is the machine currently running? */
 692     rsp_return = wait_command(from, "{ 'execute': 'query-status' }");
 693     g_assert(qdict_haskey(rsp_return, "running"));
 694     g_assert(qdict_get_bool(rsp_return, "running"));
 695     qobject_unref(rsp_return);
 696
 697     test_migrate_end(from, to, false);
 698 }
 699
 700 static void test_precopy_unix(void)
 701 {
 702     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 703     QTestState *from, *to;
 704
 705     if (test_migrate_start(&from, &to, uri, false)) {
 706         return;
 707     }
 708
 709     /* We want to pick a speed slow enough that the test completes
 710      * quickly, but that it doesn't complete precopy even on a slow
 711      * machine, so also set the downtime.
 712      */
 713     /* 1 ms should make it not converge*/
 714     migrate_set_parameter(from, "downtime-limit", 1);
 715     /* 1GB/s */
 716     migrate_set_parameter(from, "max-bandwidth", 1000000000);
 717
 718     /* Wait for the first serial output from the source */
 719     wait_for_serial("src_serial");
 720
 721     migrate(from, uri, "{}");
 722
 723     wait_for_migration_pass(from);
 724
 725     /* 300 ms should converge */
 726     migrate_set_parameter(from, "downtime-limit", 300);
 727
 728     if (!got_stop) {
 729         qtest_qmp_eventwait(from, "STOP");
 730     }
 731
 732     qtest_qmp_eventwait(to, "RESUME");
 733
 734     wait_for_serial("dest_serial");
 735     wait_for_migration_complete(from);
 736
 737     test_migrate_end(from, to, true);
 738     g_free(uri);
 739 }
 740
 741 int main(int argc, char **argv)
 742 {
 743     char template[] = "/tmp/migration-test-XXXXXX";
 744     int ret;
 745
 746     g_test_init(&argc, &argv, NULL);
 747
 748     if (!ufd_version_check()) {
 749         return 0;
 750     }
 751
 752     /*
 753      * On ppc64, the test only works with kvm-hv, but not with kvm-pr and TCG
 754      * is touchy due to race conditions on dirty bits (especially on PPC for
 755      * some reason)
 756      */
 757     if (g_str_equal(qtest_get_arch(), "ppc64") &&
 758         access("/sys/module/kvm_hv", F_OK)) {
 759         g_test_message("Skipping test: kvm_hv not available");
 760         return 0;
 761     }
 762
 763     tmpfs = mkdtemp(template);
 764     if (!tmpfs) {
 765         g_test_message("mkdtemp on path (%s): %s\n", template, strerror(errno));
 766     }
 767     g_assert(tmpfs);
 768
 769     module_call_init(MODULE_INIT_QOM);
 770
 771     qtest_add_func("/migration/postcopy/unix", test_postcopy);
 772     qtest_add_func("/migration/postcopy/recovery", test_postcopy_recovery);
 773     qtest_add_func("/migration/deprecated", test_deprecated);
 774     qtest_add_func("/migration/bad_dest", test_baddest);
 775     qtest_add_func("/migration/precopy/unix", test_precopy_unix);
 776
 777     ret = g_test_run();
 778
 779     g_assert_cmpint(ret, ==, 0);
 780
 781     ret = rmdir(tmpfs);
 782     if (ret != 0) {
 783         g_test_message("unable to rmdir: path (%s): %s\n",
 784                        tmpfs, strerror(errno));
 785     }
 786
 787     return ret;
 788 }