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 #include "tests/migration/aarch64/a-b-kernel.h"
  90
  91 static void init_bootfile(const char *bootpath, void *content)
  92 {
  93     FILE *bootfile = fopen(bootpath, "wb");
  94
  95     g_assert_cmpint(fwrite(content, 512, 1, bootfile), ==, 1);
  96     fclose(bootfile);
  97 }
  98
  99 /*
 100  * Wait for some output in the serial output file,
 101  * we get an 'A' followed by an endless string of 'B's
 102  * but on the destination we won't have the A.
 103  */
 104 static void wait_for_serial(const char *side)
 105 {
 106     char *serialpath = g_strdup_printf("%s/%s", tmpfs, side);
 107     FILE *serialfile = fopen(serialpath, "r");
 108     const char *arch = qtest_get_arch();
 109     int started = (strcmp(side, "src_serial") == 0 &&
 110                    strcmp(arch, "ppc64") == 0) ? 0 : 1;
 111
 112     g_free(serialpath);
 113     do {
 114         int readvalue = fgetc(serialfile);
 115
 116         if (!started) {
 117             /* SLOF prints its banner before starting test,
 118              * to ignore it, mark the start of the test with '_',
 119              * ignore all characters until this marker
 120              */
 121             switch (readvalue) {
 122             case '_':
 123                 started = 1;
 124                 break;
 125             case EOF:
 126                 fseek(serialfile, 0, SEEK_SET);
 127                 usleep(1000);
 128                 break;
 129             }
 130             continue;
 131         }
 132         switch (readvalue) {
 133         case 'A':
 134             /* Fine */
 135             break;
 136
 137         case 'B':
 138             /* It's alive! */
 139             fclose(serialfile);
 140             return;
 141
 142         case EOF:
 143             started = (strcmp(side, "src_serial") == 0 &&
 144                        strcmp(arch, "ppc64") == 0) ? 0 : 1;
 145             fseek(serialfile, 0, SEEK_SET);
 146             usleep(1000);
 147             break;
 148
 149         default:
 150             fprintf(stderr, "Unexpected %d on %s serial\n", readvalue, side);
 151             g_assert_not_reached();
 152         }
 153     } while (true);
 154 }
 155
 156 static void stop_cb(void *opaque, const char *name, QDict *data)
 157 {
 158     if (!strcmp(name, "STOP")) {
 159         got_stop = true;
 160     }
 161 }
 162
 163 /*
 164  * Events can get in the way of responses we are actually waiting for.
 165  */
 166 GCC_FMT_ATTR(2, 3)
 167 static QDict *wait_command(QTestState *who, const char *command, ...)
 168 {
 169     va_list ap;
 170
 171     va_start(ap, command);
 172     qtest_qmp_vsend(who, command, ap);
 173     va_end(ap);
 174
 175     return qtest_qmp_receive_success(who, stop_cb, NULL);
 176 }
 177
 178 /*
 179  * Note: caller is responsible to free the returned object via
 180  * qobject_unref() after use
 181  */
 182 static QDict *migrate_query(QTestState *who)
 183 {
 184     return wait_command(who, "{ 'execute': 'query-migrate' }");
 185 }
 186
 187 /*
 188  * Note: caller is responsible to free the returned object via
 189  * g_free() after use
 190  */
 191 static gchar *migrate_query_status(QTestState *who)
 192 {
 193     QDict *rsp_return = migrate_query(who);
 194     gchar *status = g_strdup(qdict_get_str(rsp_return, "status"));
 195
 196     g_assert(status);
 197     qobject_unref(rsp_return);
 198
 199     return status;
 200 }
 201
 202 /*
 203  * It's tricky to use qemu's migration event capability with qtest,
 204  * events suddenly appearing confuse the qmp()/hmp() responses.
 205  */
 206
 207 static uint64_t get_migration_pass(QTestState *who)
 208 {
 209     QDict *rsp_return, *rsp_ram;
 210     uint64_t result;
 211
 212     rsp_return = migrate_query(who);
 213     if (!qdict_haskey(rsp_return, "ram")) {
 214         /* Still in setup */
 215         result = 0;
 216     } else {
 217         rsp_ram = qdict_get_qdict(rsp_return, "ram");
 218         result = qdict_get_try_int(rsp_ram, "dirty-sync-count", 0);
 219     }
 220     qobject_unref(rsp_return);
 221     return result;
 222 }
 223
 224 static void read_blocktime(QTestState *who)
 225 {
 226     QDict *rsp_return;
 227
 228     rsp_return = migrate_query(who);
 229     g_assert(qdict_haskey(rsp_return, "postcopy-blocktime"));
 230     qobject_unref(rsp_return);
 231 }
 232
 233 static void wait_for_migration_status(QTestState *who,
 234                                       const char *goal)
 235 {
 236     while (true) {
 237         bool completed;
 238         char *status;
 239
 240         status = migrate_query_status(who);
 241         completed = strcmp(status, goal) == 0;
 242         g_assert_cmpstr(status, !=,  "failed");
 243         g_free(status);
 244         if (completed) {
 245             return;
 246         }
 247         usleep(1000);
 248     }
 249 }
 250
 251 static void wait_for_migration_complete(QTestState *who)
 252 {
 253     wait_for_migration_status(who, "completed");
 254 }
 255
 256 static void wait_for_migration_pass(QTestState *who)
 257 {
 258     uint64_t initial_pass = get_migration_pass(who);
 259     uint64_t pass;
 260
 261     /* Wait for the 1st sync */
 262     while (!got_stop && !initial_pass) {
 263         usleep(1000);
 264         initial_pass = get_migration_pass(who);
 265     }
 266
 267     do {
 268         usleep(1000);
 269         pass = get_migration_pass(who);
 270     } while (pass == initial_pass && !got_stop);
 271 }
 272
 273 static void check_guests_ram(QTestState *who)
 274 {
 275     /* Our ASM test will have been incrementing one byte from each page from
 276      * start_address to < end_address in order. This gives us a constraint
 277      * that any page's byte should be equal or less than the previous pages
 278      * byte (mod 256); and they should all be equal except for one transition
 279      * at the point where we meet the incrementer. (We're running this with
 280      * the guest stopped).
 281      */
 282     unsigned address;
 283     uint8_t first_byte;
 284     uint8_t last_byte;
 285     bool hit_edge = false;
 286     bool bad = false;
 287
 288     qtest_memread(who, start_address, &first_byte, 1);
 289     last_byte = first_byte;
 290
 291     for (address = start_address + TEST_MEM_PAGE_SIZE; address < end_address;
 292          address += TEST_MEM_PAGE_SIZE)
 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                                     long long value)
 326 {
 327     QDict *rsp_return;
 328
 329     rsp_return = wait_command(who,
 330                               "{ 'execute': 'query-migrate-parameters' }");
 331     g_assert_cmpint(qdict_get_int(rsp_return, parameter), ==, value);
 332     qobject_unref(rsp_return);
 333 }
 334
 335 static void migrate_set_parameter(QTestState *who, const char *parameter,
 336                                   long long value)
 337 {
 338     QDict *rsp;
 339
 340     rsp = qtest_qmp(who,
 341                     "{ 'execute': 'migrate-set-parameters',"
 342                     "'arguments': { %s: %lld } }",
 343                     parameter, value);
 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
 361     rsp = wait_command(who,
 362                        "{ 'execute': 'migrate-recover', "
 363                        "  'id': 'recover-cmd', "
 364                        "  'arguments': { 'uri': %s } }",
 365                        uri);
 366     qobject_unref(rsp);
 367 }
 368
 369 static void migrate_set_capability(QTestState *who, const char *capability,
 370                                    bool value)
 371 {
 372     QDict *rsp;
 373
 374     rsp = qtest_qmp(who,
 375                     "{ 'execute': 'migrate-set-capabilities',"
 376                     "'arguments': { "
 377                     "'capabilities': [ { "
 378                     "'capability': %s, 'state': %i } ] } }",
 379                     capability, value);
 380     g_assert(qdict_haskey(rsp, "return"));
 381     qobject_unref(rsp);
 382 }
 383
 384 /*
 385  * Send QMP command "migrate".
 386  * Arguments are built from @fmt... (formatted like
 387  * qobject_from_jsonf_nofail()) with "uri": @uri spliced in.
 388  */
 389 GCC_FMT_ATTR(3, 4)
 390 static void migrate(QTestState *who, const char *uri, const char *fmt, ...)
 391 {
 392     va_list ap;
 393     QDict *args, *rsp;
 394
 395     va_start(ap, fmt);
 396     args = qdict_from_vjsonf_nofail(fmt, ap);
 397     va_end(ap);
 398
 399     g_assert(!qdict_haskey(args, "uri"));
 400     qdict_put_str(args, "uri", uri);
 401
 402     rsp = qmp("{ 'execute': 'migrate', 'arguments': %p}", args);
 403     g_assert(qdict_haskey(rsp, "return"));
 404     qobject_unref(rsp);
 405 }
 406
 407 static void migrate_postcopy_start(QTestState *from, QTestState *to)
 408 {
 409     QDict *rsp;
 410
 411     rsp = wait_command(from, "{ 'execute': 'migrate-start-postcopy' }");
 412     qobject_unref(rsp);
 413
 414     if (!got_stop) {
 415         qtest_qmp_eventwait(from, "STOP");
 416     }
 417
 418     qtest_qmp_eventwait(to, "RESUME");
 419 }
 420
 421 static int test_migrate_start(QTestState **from, QTestState **to,
 422                                const char *uri, bool hide_stderr)
 423 {
 424     gchar *cmd_src, *cmd_dst;
 425     char *bootpath = g_strdup_printf("%s/bootsect", tmpfs);
 426     const char *arch = qtest_get_arch();
 427     const char *accel = "kvm:tcg";
 428
 429     got_stop = false;
 430
 431     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
 432         init_bootfile(bootpath, x86_bootsect);
 433         cmd_src = g_strdup_printf("-machine accel=%s -m 150M"
 434                                   " -name source,debug-threads=on"
 435                                   " -serial file:%s/src_serial"
 436                                   " -drive file=%s,format=raw",
 437                                   accel, tmpfs, bootpath);
 438         cmd_dst = g_strdup_printf("-machine accel=%s -m 150M"
 439                                   " -name target,debug-threads=on"
 440                                   " -serial file:%s/dest_serial"
 441                                   " -drive file=%s,format=raw"
 442                                   " -incoming %s",
 443                                   accel, tmpfs, bootpath, uri);
 444         start_address = X86_TEST_MEM_START;
 445         end_address = X86_TEST_MEM_END;
 446     } else if (strcmp(arch, "ppc64") == 0) {
 447         cmd_src = g_strdup_printf("-machine accel=%s -m 256M -nodefaults"
 448                                   " -name source,debug-threads=on"
 449                                   " -serial file:%s/src_serial"
 450                                   " -prom-env 'use-nvramrc?=true' -prom-env "
 451                                   "'nvramrc=hex .\" _\" begin %x %x "
 452                                   "do i c@ 1 + i c! 1000 +loop .\" B\" 0 "
 453                                   "until'",  accel, tmpfs, end_address,
 454                                   start_address);
 455         cmd_dst = g_strdup_printf("-machine accel=%s -m 256M"
 456                                   " -name target,debug-threads=on"
 457                                   " -serial file:%s/dest_serial"
 458                                   " -incoming %s",
 459                                   accel, tmpfs, uri);
 460
 461         start_address = PPC_TEST_MEM_START;
 462         end_address = PPC_TEST_MEM_END;
 463     } else if (strcmp(arch, "aarch64") == 0) {
 464         init_bootfile(bootpath, aarch64_kernel);
 465         cmd_src = g_strdup_printf("-machine virt,accel=%s,gic-version=max "
 466                                   "-name vmsource,debug-threads=on -cpu max "
 467                                   "-m 150M -serial file:%s/src_serial "
 468                                   "-kernel %s ",
 469                                   accel, tmpfs, bootpath);
 470         cmd_dst = g_strdup_printf("-machine virt,accel=%s,gic-version=max "
 471                                   "-name vmdest,debug-threads=on -cpu max "
 472                                   "-m 150M -serial file:%s/dest_serial "
 473                                   "-kernel %s "
 474                                   "-incoming %s ",
 475                                   accel, tmpfs, bootpath, uri);
 476
 477         start_address = ARM_TEST_MEM_START;
 478         end_address = ARM_TEST_MEM_END;
 479
 480         g_assert(sizeof(aarch64_kernel) <= ARM_TEST_MAX_KERNEL_SIZE);
 481     } else {
 482         g_assert_not_reached();
 483     }
 484
 485     g_free(bootpath);
 486
 487     if (hide_stderr) {
 488         gchar *tmp;
 489         tmp = g_strdup_printf("%s 2>/dev/null", cmd_src);
 490         g_free(cmd_src);
 491         cmd_src = tmp;
 492
 493         tmp = g_strdup_printf("%s 2>/dev/null", cmd_dst);
 494         g_free(cmd_dst);
 495         cmd_dst = tmp;
 496     }
 497
 498     *from = qtest_start(cmd_src);
 499     g_free(cmd_src);
 500
 501     *to = qtest_init(cmd_dst);
 502     g_free(cmd_dst);
 503     return 0;
 504 }
 505
 506 static void test_migrate_end(QTestState *from, QTestState *to, bool test_dest)
 507 {
 508     unsigned char dest_byte_a, dest_byte_b, dest_byte_c, dest_byte_d;
 509
 510     qtest_quit(from);
 511
 512     if (test_dest) {
 513         qtest_memread(to, start_address, &dest_byte_a, 1);
 514
 515         /* Destination still running, wait for a byte to change */
 516         do {
 517             qtest_memread(to, start_address, &dest_byte_b, 1);
 518             usleep(1000 * 10);
 519         } while (dest_byte_a == dest_byte_b);
 520
 521         qtest_qmp_discard_response(to, "{ 'execute' : 'stop'}");
 522
 523         /* With it stopped, check nothing changes */
 524         qtest_memread(to, start_address, &dest_byte_c, 1);
 525         usleep(1000 * 200);
 526         qtest_memread(to, start_address, &dest_byte_d, 1);
 527         g_assert_cmpint(dest_byte_c, ==, dest_byte_d);
 528
 529         check_guests_ram(to);
 530     }
 531
 532     qtest_quit(to);
 533
 534     cleanup("bootsect");
 535     cleanup("migsocket");
 536     cleanup("src_serial");
 537     cleanup("dest_serial");
 538 }
 539
 540 static void deprecated_set_downtime(QTestState *who, const double value)
 541 {
 542     QDict *rsp;
 543
 544     rsp = qtest_qmp(who,
 545                     "{ 'execute': 'migrate_set_downtime',"
 546                     " 'arguments': { 'value': %f } }", value);
 547     g_assert(qdict_haskey(rsp, "return"));
 548     qobject_unref(rsp);
 549     migrate_check_parameter(who, "downtime-limit", value * 1000);
 550 }
 551
 552 static void deprecated_set_speed(QTestState *who, long long value)
 553 {
 554     QDict *rsp;
 555
 556     rsp = qtest_qmp(who, "{ 'execute': 'migrate_set_speed',"
 557                           "'arguments': { 'value': %lld } }", value);
 558     g_assert(qdict_haskey(rsp, "return"));
 559     qobject_unref(rsp);
 560     migrate_check_parameter(who, "max-bandwidth", value);
 561 }
 562
 563 static void test_deprecated(void)
 564 {
 565     QTestState *from;
 566
 567     from = qtest_start("-machine none");
 568
 569     deprecated_set_downtime(from, 0.12345);
 570     deprecated_set_speed(from, 12345);
 571
 572     qtest_quit(from);
 573 }
 574
 575 static int migrate_postcopy_prepare(QTestState **from_ptr,
 576                                      QTestState **to_ptr,
 577                                      bool hide_error)
 578 {
 579     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 580     QTestState *from, *to;
 581
 582     if (test_migrate_start(&from, &to, uri, hide_error)) {
 583         return -1;
 584     }
 585
 586     migrate_set_capability(from, "postcopy-ram", true);
 587     migrate_set_capability(to, "postcopy-ram", true);
 588     migrate_set_capability(to, "postcopy-blocktime", true);
 589
 590     /* We want to pick a speed slow enough that the test completes
 591      * quickly, but that it doesn't complete precopy even on a slow
 592      * machine, so also set the downtime.
 593      */
 594     migrate_set_parameter(from, "max-bandwidth", 100000000);
 595     migrate_set_parameter(from, "downtime-limit", 1);
 596
 597     /* Wait for the first serial output from the source */
 598     wait_for_serial("src_serial");
 599
 600     migrate(from, uri, "{}");
 601     g_free(uri);
 602
 603     wait_for_migration_pass(from);
 604
 605     *from_ptr = from;
 606     *to_ptr = to;
 607
 608     return 0;
 609 }
 610
 611 static void migrate_postcopy_complete(QTestState *from, QTestState *to)
 612 {
 613     wait_for_migration_complete(from);
 614
 615     /* Make sure we get at least one "B" on destination */
 616     wait_for_serial("dest_serial");
 617
 618     if (uffd_feature_thread_id) {
 619         read_blocktime(to);
 620     }
 621
 622     test_migrate_end(from, to, true);
 623 }
 624
 625 static void test_postcopy(void)
 626 {
 627     QTestState *from, *to;
 628
 629     if (migrate_postcopy_prepare(&from, &to, false)) {
 630         return;
 631     }
 632     migrate_postcopy_start(from, to);
 633     migrate_postcopy_complete(from, to);
 634 }
 635
 636 static void test_postcopy_recovery(void)
 637 {
 638     QTestState *from, *to;
 639     char *uri;
 640
 641     if (migrate_postcopy_prepare(&from, &to, true)) {
 642         return;
 643     }
 644
 645     /* Turn postcopy speed down, 4K/s is slow enough on any machines */
 646     migrate_set_parameter(from, "max-postcopy-bandwidth", 4096);
 647
 648     /* Now we start the postcopy */
 649     migrate_postcopy_start(from, to);
 650
 651     /*
 652      * Wait until postcopy is really started; we can only run the
 653      * migrate-pause command during a postcopy
 654      */
 655     wait_for_migration_status(from, "postcopy-active");
 656
 657     /*
 658      * Manually stop the postcopy migration. This emulates a network
 659      * failure with the migration socket
 660      */
 661     migrate_pause(from);
 662
 663     /*
 664      * Wait for destination side to reach postcopy-paused state.  The
 665      * migrate-recover command can only succeed if destination machine
 666      * is in the paused state
 667      */
 668     wait_for_migration_status(to, "postcopy-paused");
 669
 670     /*
 671      * Create a new socket to emulate a new channel that is different
 672      * from the broken migration channel; tell the destination to
 673      * listen to the new port
 674      */
 675     uri = g_strdup_printf("unix:%s/migsocket-recover", tmpfs);
 676     migrate_recover(to, uri);
 677
 678     /*
 679      * Try to rebuild the migration channel using the resume flag and
 680      * the newly created channel
 681      */
 682     wait_for_migration_status(from, "postcopy-paused");
 683     migrate(from, uri, "{'resume': true}");
 684     g_free(uri);
 685
 686     /* Restore the postcopy bandwidth to unlimited */
 687     migrate_set_parameter(from, "max-postcopy-bandwidth", 0);
 688
 689     migrate_postcopy_complete(from, to);
 690 }
 691
 692 static void test_baddest(void)
 693 {
 694     QTestState *from, *to;
 695     QDict *rsp_return;
 696     char *status;
 697     bool failed;
 698
 699     if (test_migrate_start(&from, &to, "tcp:0:0", true)) {
 700         return;
 701     }
 702     migrate(from, "tcp:0:0", "{}");
 703     do {
 704         status = migrate_query_status(from);
 705         g_assert(!strcmp(status, "setup") || !(strcmp(status, "failed")));
 706         failed = !strcmp(status, "failed");
 707         g_free(status);
 708     } while (!failed);
 709
 710     /* Is the machine currently running? */
 711     rsp_return = wait_command(from, "{ 'execute': 'query-status' }");
 712     g_assert(qdict_haskey(rsp_return, "running"));
 713     g_assert(qdict_get_bool(rsp_return, "running"));
 714     qobject_unref(rsp_return);
 715
 716     test_migrate_end(from, to, false);
 717 }
 718
 719 static void test_precopy_unix(void)
 720 {
 721     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 722     QTestState *from, *to;
 723
 724     if (test_migrate_start(&from, &to, uri, false)) {
 725         return;
 726     }
 727
 728     /* We want to pick a speed slow enough that the test completes
 729      * quickly, but that it doesn't complete precopy even on a slow
 730      * machine, so also set the downtime.
 731      */
 732     /* 1 ms should make it not converge*/
 733     migrate_set_parameter(from, "downtime-limit", 1);
 734     /* 1GB/s */
 735     migrate_set_parameter(from, "max-bandwidth", 1000000000);
 736
 737     /* Wait for the first serial output from the source */
 738     wait_for_serial("src_serial");
 739
 740     migrate(from, uri, "{}");
 741
 742     wait_for_migration_pass(from);
 743
 744     /* 300 ms should converge */
 745     migrate_set_parameter(from, "downtime-limit", 300);
 746
 747     if (!got_stop) {
 748         qtest_qmp_eventwait(from, "STOP");
 749     }
 750
 751     qtest_qmp_eventwait(to, "RESUME");
 752
 753     wait_for_serial("dest_serial");
 754     wait_for_migration_complete(from);
 755
 756     test_migrate_end(from, to, true);
 757     g_free(uri);
 758 }
 759
 760 int main(int argc, char **argv)
 761 {
 762     char template[] = "/tmp/migration-test-XXXXXX";
 763     int ret;
 764
 765     g_test_init(&argc, &argv, NULL);
 766
 767     if (!ufd_version_check()) {
 768         return 0;
 769     }
 770
 771     /*
 772      * On ppc64, the test only works with kvm-hv, but not with kvm-pr and TCG
 773      * is touchy due to race conditions on dirty bits (especially on PPC for
 774      * some reason)
 775      */
 776     if (g_str_equal(qtest_get_arch(), "ppc64") &&
 777         access("/sys/module/kvm_hv", F_OK)) {
 778         g_test_message("Skipping test: kvm_hv not available");
 779         return 0;
 780     }
 781
 782     tmpfs = mkdtemp(template);
 783     if (!tmpfs) {
 784         g_test_message("mkdtemp on path (%s): %s\n", template, strerror(errno));
 785     }
 786     g_assert(tmpfs);
 787
 788     module_call_init(MODULE_INIT_QOM);
 789
 790     qtest_add_func("/migration/postcopy/unix", test_postcopy);
 791     qtest_add_func("/migration/postcopy/recovery", test_postcopy_recovery);
 792     qtest_add_func("/migration/deprecated", test_deprecated);
 793     qtest_add_func("/migration/bad_dest", test_baddest);
 794     qtest_add_func("/migration/precopy/unix", test_precopy_unix);
 795
 796     ret = g_test_run();
 797
 798     g_assert_cmpint(ret, ==, 0);
 799
 800     ret = rmdir(tmpfs);
 801     if (ret != 0) {
 802         g_test_message("unable to rmdir: path (%s): %s\n",
 803                        tmpfs, strerror(errno));
 804     }
 805
 806     return ret;
 807 }