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/module.h"
  19 #include "qemu/option.h"
  20 #include "qemu/range.h"
  21 #include "qemu/sockets.h"
  22 #include "chardev/char.h"
  23 #include "qapi/qapi-visit-sockets.h"
  24 #include "qapi/qobject-input-visitor.h"
  25 #include "qapi/qobject-output-visitor.h"
  26
  27 #include "migration/migration-test.h"
  28
  29 /* TODO actually test the results and get rid of this */
  30 #define qtest_qmp_discard_response(...) qobject_unref(qtest_qmp(__VA_ARGS__))
  31
  32 unsigned start_address;
  33 unsigned end_address;
  34 bool got_stop;
  35 static bool uffd_feature_thread_id;
  36
  37 #if defined(__linux__)
  38 #include <sys/syscall.h>
  39 #include <sys/vfs.h>
  40 #endif
  41
  42 #if defined(__linux__) && defined(__NR_userfaultfd) && defined(CONFIG_EVENTFD)
  43 #include <sys/eventfd.h>
  44 #include <sys/ioctl.h>
  45 #include <linux/userfaultfd.h>
  46
  47 static bool ufd_version_check(void)
  48 {
  49     struct uffdio_api api_struct;
  50     uint64_t ioctl_mask;
  51
  52     int ufd = syscall(__NR_userfaultfd, O_CLOEXEC);
  53
  54     if (ufd == -1) {
  55         g_test_message("Skipping test: userfaultfd not available");
  56         return false;
  57     }
  58
  59     api_struct.api = UFFD_API;
  60     api_struct.features = 0;
  61     if (ioctl(ufd, UFFDIO_API, &api_struct)) {
  62         g_test_message("Skipping test: UFFDIO_API failed");
  63         return false;
  64     }
  65     uffd_feature_thread_id = api_struct.features & UFFD_FEATURE_THREAD_ID;
  66
  67     ioctl_mask = (__u64)1 << _UFFDIO_REGISTER |
  68                  (__u64)1 << _UFFDIO_UNREGISTER;
  69     if ((api_struct.ioctls & ioctl_mask) != ioctl_mask) {
  70         g_test_message("Skipping test: Missing userfault feature");
  71         return false;
  72     }
  73
  74     return true;
  75 }
  76
  77 #else
  78 static bool ufd_version_check(void)
  79 {
  80     g_test_message("Skipping test: Userfault not available (builtdtime)");
  81     return false;
  82 }
  83
  84 #endif
  85
  86 static const char *tmpfs;
  87
  88 /* The boot file modifies memory area in [start_address, end_address)
  89  * repeatedly. It outputs a 'B' at a fixed rate while it's still running.
  90  */
  91 #include "tests/migration/i386/a-b-bootblock.h"
  92 #include "tests/migration/aarch64/a-b-kernel.h"
  93 #include "tests/migration/s390x/a-b-bios.h"
  94
  95 static void init_bootfile(const char *bootpath, void *content, size_t len)
  96 {
  97     FILE *bootfile = fopen(bootpath, "wb");
  98
  99     g_assert_cmpint(fwrite(content, len, 1, bootfile), ==, 1);
 100     fclose(bootfile);
 101 }
 102
 103 /*
 104  * Wait for some output in the serial output file,
 105  * we get an 'A' followed by an endless string of 'B's
 106  * but on the destination we won't have the A.
 107  */
 108 static void wait_for_serial(const char *side)
 109 {
 110     char *serialpath = g_strdup_printf("%s/%s", tmpfs, side);
 111     FILE *serialfile = fopen(serialpath, "r");
 112     const char *arch = qtest_get_arch();
 113     int started = (strcmp(side, "src_serial") == 0 &&
 114                    strcmp(arch, "ppc64") == 0) ? 0 : 1;
 115
 116     g_free(serialpath);
 117     do {
 118         int readvalue = fgetc(serialfile);
 119
 120         if (!started) {
 121             /* SLOF prints its banner before starting test,
 122              * to ignore it, mark the start of the test with '_',
 123              * ignore all characters until this marker
 124              */
 125             switch (readvalue) {
 126             case '_':
 127                 started = 1;
 128                 break;
 129             case EOF:
 130                 fseek(serialfile, 0, SEEK_SET);
 131                 usleep(1000);
 132                 break;
 133             }
 134             continue;
 135         }
 136         switch (readvalue) {
 137         case 'A':
 138             /* Fine */
 139             break;
 140
 141         case 'B':
 142             /* It's alive! */
 143             fclose(serialfile);
 144             return;
 145
 146         case EOF:
 147             started = (strcmp(side, "src_serial") == 0 &&
 148                        strcmp(arch, "ppc64") == 0) ? 0 : 1;
 149             fseek(serialfile, 0, SEEK_SET);
 150             usleep(1000);
 151             break;
 152
 153         default:
 154             fprintf(stderr, "Unexpected %d on %s serial\n", readvalue, side);
 155             g_assert_not_reached();
 156         }
 157     } while (true);
 158 }
 159
 160 static void stop_cb(void *opaque, const char *name, QDict *data)
 161 {
 162     if (!strcmp(name, "STOP")) {
 163         got_stop = true;
 164     }
 165 }
 166
 167 /*
 168  * Events can get in the way of responses we are actually waiting for.
 169  */
 170 GCC_FMT_ATTR(3, 4)
 171 static QDict *wait_command_fd(QTestState *who, int fd, const char *command, ...)
 172 {
 173     va_list ap;
 174
 175     va_start(ap, command);
 176     qtest_qmp_vsend_fds(who, &fd, 1, command, ap);
 177     va_end(ap);
 178
 179     return qtest_qmp_receive_success(who, stop_cb, NULL);
 180 }
 181
 182 /*
 183  * Events can get in the way of responses we are actually waiting for.
 184  */
 185 GCC_FMT_ATTR(2, 3)
 186 static QDict *wait_command(QTestState *who, const char *command, ...)
 187 {
 188     va_list ap;
 189
 190     va_start(ap, command);
 191     qtest_qmp_vsend(who, command, ap);
 192     va_end(ap);
 193
 194     return qtest_qmp_receive_success(who, stop_cb, NULL);
 195 }
 196
 197 /*
 198  * Note: caller is responsible to free the returned object via
 199  * qobject_unref() after use
 200  */
 201 static QDict *migrate_query(QTestState *who)
 202 {
 203     return wait_command(who, "{ 'execute': 'query-migrate' }");
 204 }
 205
 206 /*
 207  * Note: caller is responsible to free the returned object via
 208  * g_free() after use
 209  */
 210 static gchar *migrate_query_status(QTestState *who)
 211 {
 212     QDict *rsp_return = migrate_query(who);
 213     gchar *status = g_strdup(qdict_get_str(rsp_return, "status"));
 214
 215     g_assert(status);
 216     qobject_unref(rsp_return);
 217
 218     return status;
 219 }
 220
 221 /*
 222  * It's tricky to use qemu's migration event capability with qtest,
 223  * events suddenly appearing confuse the qmp()/hmp() responses.
 224  */
 225
 226 static int64_t read_ram_property_int(QTestState *who, const char *property)
 227 {
 228     QDict *rsp_return, *rsp_ram;
 229     int64_t result;
 230
 231     rsp_return = migrate_query(who);
 232     if (!qdict_haskey(rsp_return, "ram")) {
 233         /* Still in setup */
 234         result = 0;
 235     } else {
 236         rsp_ram = qdict_get_qdict(rsp_return, "ram");
 237         result = qdict_get_try_int(rsp_ram, property, 0);
 238     }
 239     qobject_unref(rsp_return);
 240     return result;
 241 }
 242
 243 static int64_t read_migrate_property_int(QTestState *who, const char *property)
 244 {
 245     QDict *rsp_return;
 246     int64_t result;
 247
 248     rsp_return = migrate_query(who);
 249     result = qdict_get_try_int(rsp_return, property, 0);
 250     qobject_unref(rsp_return);
 251     return result;
 252 }
 253
 254 static uint64_t get_migration_pass(QTestState *who)
 255 {
 256     return read_ram_property_int(who, "dirty-sync-count");
 257 }
 258
 259 static void read_blocktime(QTestState *who)
 260 {
 261     QDict *rsp_return;
 262
 263     rsp_return = migrate_query(who);
 264     g_assert(qdict_haskey(rsp_return, "postcopy-blocktime"));
 265     qobject_unref(rsp_return);
 266 }
 267
 268 static bool check_migration_status(QTestState *who, const char *goal,
 269                                    const char **ungoals)
 270 {
 271     bool ready;
 272     char *current_status;
 273     const char **ungoal;
 274
 275     current_status = migrate_query_status(who);
 276     ready = strcmp(current_status, goal) == 0;
 277     if (!ungoals) {
 278         g_assert_cmpstr(current_status, !=, "failed");
 279         /*
 280          * If looking for a state other than completed,
 281          * completion of migration would cause the test to
 282          * hang.
 283          */
 284         if (strcmp(goal, "completed") != 0) {
 285             g_assert_cmpstr(current_status, !=, "completed");
 286         }
 287     } else {
 288         for (ungoal = ungoals; *ungoal; ungoal++) {
 289             g_assert_cmpstr(current_status, !=,  *ungoal);
 290         }
 291     }
 292     g_free(current_status);
 293     return ready;
 294 }
 295
 296 static void wait_for_migration_status(QTestState *who,
 297                                       const char *goal,
 298                                       const char **ungoals)
 299 {
 300     while (!check_migration_status(who, goal, ungoals)) {
 301         usleep(1000);
 302     }
 303 }
 304
 305 static void wait_for_migration_complete(QTestState *who)
 306 {
 307     wait_for_migration_status(who, "completed", NULL);
 308 }
 309
 310 static void wait_for_migration_pass(QTestState *who)
 311 {
 312     uint64_t initial_pass = get_migration_pass(who);
 313     uint64_t pass;
 314
 315     /* Wait for the 1st sync */
 316     while (!got_stop && !initial_pass) {
 317         usleep(1000);
 318         initial_pass = get_migration_pass(who);
 319     }
 320
 321     do {
 322         usleep(1000);
 323         pass = get_migration_pass(who);
 324     } while (pass == initial_pass && !got_stop);
 325 }
 326
 327 static void check_guests_ram(QTestState *who)
 328 {
 329     /* Our ASM test will have been incrementing one byte from each page from
 330      * start_address to < end_address in order. This gives us a constraint
 331      * that any page's byte should be equal or less than the previous pages
 332      * byte (mod 256); and they should all be equal except for one transition
 333      * at the point where we meet the incrementer. (We're running this with
 334      * the guest stopped).
 335      */
 336     unsigned address;
 337     uint8_t first_byte;
 338     uint8_t last_byte;
 339     bool hit_edge = false;
 340     int bad = 0;
 341
 342     qtest_memread(who, start_address, &first_byte, 1);
 343     last_byte = first_byte;
 344
 345     for (address = start_address + TEST_MEM_PAGE_SIZE; address < end_address;
 346          address += TEST_MEM_PAGE_SIZE)
 347     {
 348         uint8_t b;
 349         qtest_memread(who, address, &b, 1);
 350         if (b != last_byte) {
 351             if (((b + 1) % 256) == last_byte && !hit_edge) {
 352                 /* This is OK, the guest stopped at the point of
 353                  * incrementing the previous page but didn't get
 354                  * to us yet.
 355                  */
 356                 hit_edge = true;
 357                 last_byte = b;
 358             } else {
 359                 bad++;
 360                 if (bad <= 10) {
 361                     fprintf(stderr, "Memory content inconsistency at %x"
 362                             " first_byte = %x last_byte = %x current = %x"
 363                             " hit_edge = %x\n",
 364                             address, first_byte, last_byte, b, hit_edge);
 365                 }
 366             }
 367         }
 368     }
 369     if (bad >= 10) {
 370         fprintf(stderr, "and in another %d pages", bad - 10);
 371     }
 372     g_assert(bad == 0);
 373 }
 374
 375 static void cleanup(const char *filename)
 376 {
 377     char *path = g_strdup_printf("%s/%s", tmpfs, filename);
 378
 379     unlink(path);
 380     g_free(path);
 381 }
 382
 383 static char *get_shmem_opts(const char *mem_size, const char *shmem_path)
 384 {
 385     return g_strdup_printf("-object memory-backend-file,id=mem0,size=%s"
 386                            ",mem-path=%s,share=on -numa node,memdev=mem0",
 387                            mem_size, shmem_path);
 388 }
 389
 390 static char *SocketAddress_to_str(SocketAddress *addr)
 391 {
 392     switch (addr->type) {
 393     case SOCKET_ADDRESS_TYPE_INET:
 394         return g_strdup_printf("tcp:%s:%s",
 395                                addr->u.inet.host,
 396                                addr->u.inet.port);
 397     case SOCKET_ADDRESS_TYPE_UNIX:
 398         return g_strdup_printf("unix:%s",
 399                                addr->u.q_unix.path);
 400     case SOCKET_ADDRESS_TYPE_FD:
 401         return g_strdup_printf("fd:%s", addr->u.fd.str);
 402     case SOCKET_ADDRESS_TYPE_VSOCK:
 403         return g_strdup_printf("tcp:%s:%s",
 404                                addr->u.vsock.cid,
 405                                addr->u.vsock.port);
 406     default:
 407         return g_strdup("unknown address type");
 408     }
 409 }
 410
 411 static char *migrate_get_socket_address(QTestState *who, const char *parameter)
 412 {
 413     QDict *rsp;
 414     char *result;
 415     Error *local_err = NULL;
 416     SocketAddressList *addrs;
 417     Visitor *iv = NULL;
 418     QObject *object;
 419
 420     rsp = migrate_query(who);
 421     object = qdict_get(rsp, parameter);
 422
 423     iv = qobject_input_visitor_new(object);
 424     visit_type_SocketAddressList(iv, NULL, &addrs, &local_err);
 425     visit_free(iv);
 426
 427     /* we are only using a single address */
 428     result = SocketAddress_to_str(addrs->value);
 429
 430     qapi_free_SocketAddressList(addrs);
 431     qobject_unref(rsp);
 432     return result;
 433 }
 434
 435 static long long migrate_get_parameter_int(QTestState *who,
 436                                            const char *parameter)
 437 {
 438     QDict *rsp;
 439     long long result;
 440
 441     rsp = wait_command(who, "{ 'execute': 'query-migrate-parameters' }");
 442     result = qdict_get_int(rsp, parameter);
 443     qobject_unref(rsp);
 444     return result;
 445 }
 446
 447 static void migrate_check_parameter_int(QTestState *who, const char *parameter,
 448                                         long long value)
 449 {
 450     long long result;
 451
 452     result = migrate_get_parameter_int(who, parameter);
 453     g_assert_cmpint(result, ==, value);
 454 }
 455
 456 static void migrate_set_parameter_int(QTestState *who, const char *parameter,
 457                                       long long value)
 458 {
 459     QDict *rsp;
 460
 461     rsp = qtest_qmp(who,
 462                     "{ 'execute': 'migrate-set-parameters',"
 463                     "'arguments': { %s: %lld } }",
 464                     parameter, value);
 465     g_assert(qdict_haskey(rsp, "return"));
 466     qobject_unref(rsp);
 467     migrate_check_parameter_int(who, parameter, value);
 468 }
 469
 470 static void migrate_pause(QTestState *who)
 471 {
 472     QDict *rsp;
 473
 474     rsp = wait_command(who, "{ 'execute': 'migrate-pause' }");
 475     qobject_unref(rsp);
 476 }
 477
 478 static void migrate_continue(QTestState *who, const char *state)
 479 {
 480     QDict *rsp;
 481
 482     rsp = wait_command(who,
 483                        "{ 'execute': 'migrate-continue',"
 484                        "  'arguments': { 'state': %s } }",
 485                        state);
 486     qobject_unref(rsp);
 487 }
 488
 489 static void migrate_recover(QTestState *who, const char *uri)
 490 {
 491     QDict *rsp;
 492
 493     rsp = wait_command(who,
 494                        "{ 'execute': 'migrate-recover', "
 495                        "  'id': 'recover-cmd', "
 496                        "  'arguments': { 'uri': %s } }",
 497                        uri);
 498     qobject_unref(rsp);
 499 }
 500
 501 static void migrate_set_capability(QTestState *who, const char *capability,
 502                                    bool value)
 503 {
 504     QDict *rsp;
 505
 506     rsp = qtest_qmp(who,
 507                     "{ 'execute': 'migrate-set-capabilities',"
 508                     "'arguments': { "
 509                     "'capabilities': [ { "
 510                     "'capability': %s, 'state': %i } ] } }",
 511                     capability, value);
 512     g_assert(qdict_haskey(rsp, "return"));
 513     qobject_unref(rsp);
 514 }
 515
 516 /*
 517  * Send QMP command "migrate".
 518  * Arguments are built from @fmt... (formatted like
 519  * qobject_from_jsonf_nofail()) with "uri": @uri spliced in.
 520  */
 521 GCC_FMT_ATTR(3, 4)
 522 static void migrate(QTestState *who, const char *uri, const char *fmt, ...)
 523 {
 524     va_list ap;
 525     QDict *args, *rsp;
 526
 527     va_start(ap, fmt);
 528     args = qdict_from_vjsonf_nofail(fmt, ap);
 529     va_end(ap);
 530
 531     g_assert(!qdict_haskey(args, "uri"));
 532     qdict_put_str(args, "uri", uri);
 533
 534     rsp = qtest_qmp(who, "{ 'execute': 'migrate', 'arguments': %p}", args);
 535
 536     g_assert(qdict_haskey(rsp, "return"));
 537     qobject_unref(rsp);
 538 }
 539
 540 static void migrate_postcopy_start(QTestState *from, QTestState *to)
 541 {
 542     QDict *rsp;
 543
 544     rsp = wait_command(from, "{ 'execute': 'migrate-start-postcopy' }");
 545     qobject_unref(rsp);
 546
 547     if (!got_stop) {
 548         qtest_qmp_eventwait(from, "STOP");
 549     }
 550
 551     qtest_qmp_eventwait(to, "RESUME");
 552 }
 553
 554 static int test_migrate_start(QTestState **from, QTestState **to,
 555                                const char *uri, bool hide_stderr,
 556                                bool use_shmem, const char *opts_src,
 557                                const char *opts_dst)
 558 {
 559     gchar *cmd_src, *cmd_dst;
 560     char *bootpath = NULL;
 561     char *extra_opts = NULL;
 562     char *shmem_path = NULL;
 563     const char *arch = qtest_get_arch();
 564     const char *accel = "kvm:tcg";
 565
 566     opts_src = opts_src ? opts_src : "";
 567     opts_dst = opts_dst ? opts_dst : "";
 568
 569     if (use_shmem) {
 570         if (!g_file_test("/dev/shm", G_FILE_TEST_IS_DIR)) {
 571             g_test_skip("/dev/shm is not supported");
 572             return -1;
 573         }
 574         shmem_path = g_strdup_printf("/dev/shm/qemu-%d", getpid());
 575     }
 576
 577     got_stop = false;
 578     bootpath = g_strdup_printf("%s/bootsect", tmpfs);
 579     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
 580         /* the assembled x86 boot sector should be exactly one sector large */
 581         assert(sizeof(x86_bootsect) == 512);
 582         init_bootfile(bootpath, x86_bootsect, sizeof(x86_bootsect));
 583         extra_opts = use_shmem ? get_shmem_opts("150M", shmem_path) : NULL;
 584         cmd_src = g_strdup_printf("-machine accel=%s -m 150M"
 585                                   " -name source,debug-threads=on"
 586                                   " -serial file:%s/src_serial"
 587                                   " -drive file=%s,format=raw %s %s",
 588                                   accel, tmpfs, bootpath,
 589                                   extra_opts ? extra_opts : "", opts_src);
 590         cmd_dst = g_strdup_printf("-machine accel=%s -m 150M"
 591                                   " -name target,debug-threads=on"
 592                                   " -serial file:%s/dest_serial"
 593                                   " -drive file=%s,format=raw"
 594                                   " -incoming %s %s %s",
 595                                   accel, tmpfs, bootpath, uri,
 596                                   extra_opts ? extra_opts : "", opts_dst);
 597         start_address = X86_TEST_MEM_START;
 598         end_address = X86_TEST_MEM_END;
 599     } else if (g_str_equal(arch, "s390x")) {
 600         init_bootfile(bootpath, s390x_elf, sizeof(s390x_elf));
 601         extra_opts = use_shmem ? get_shmem_opts("128M", shmem_path) : NULL;
 602         cmd_src = g_strdup_printf("-machine accel=%s -m 128M"
 603                                   " -name source,debug-threads=on"
 604                                   " -serial file:%s/src_serial -bios %s %s %s",
 605                                   accel, tmpfs, bootpath,
 606                                   extra_opts ? extra_opts : "", opts_src);
 607         cmd_dst = g_strdup_printf("-machine accel=%s -m 128M"
 608                                   " -name target,debug-threads=on"
 609                                   " -serial file:%s/dest_serial -bios %s"
 610                                   " -incoming %s %s %s",
 611                                   accel, tmpfs, bootpath, uri,
 612                                   extra_opts ? extra_opts : "", opts_dst);
 613         start_address = S390_TEST_MEM_START;
 614         end_address = S390_TEST_MEM_END;
 615     } else if (strcmp(arch, "ppc64") == 0) {
 616         extra_opts = use_shmem ? get_shmem_opts("256M", shmem_path) : NULL;
 617         cmd_src = g_strdup_printf("-machine accel=%s,vsmt=8 -m 256M -nodefaults"
 618                                   " -name source,debug-threads=on"
 619                                   " -serial file:%s/src_serial"
 620                                   " -prom-env 'use-nvramrc?=true' -prom-env "
 621                                   "'nvramrc=hex .\" _\" begin %x %x "
 622                                   "do i c@ 1 + i c! 1000 +loop .\" B\" 0 "
 623                                   "until' %s %s",  accel, tmpfs, end_address,
 624                                   start_address, extra_opts ? extra_opts : "",
 625                                   opts_src);
 626         cmd_dst = g_strdup_printf("-machine accel=%s,vsmt=8 -m 256M"
 627                                   " -name target,debug-threads=on"
 628                                   " -serial file:%s/dest_serial"
 629                                   " -incoming %s %s %s",
 630                                   accel, tmpfs, uri,
 631                                   extra_opts ? extra_opts : "", opts_dst);
 632
 633         start_address = PPC_TEST_MEM_START;
 634         end_address = PPC_TEST_MEM_END;
 635     } else if (strcmp(arch, "aarch64") == 0) {
 636         init_bootfile(bootpath, aarch64_kernel, sizeof(aarch64_kernel));
 637         extra_opts = use_shmem ? get_shmem_opts("150M", shmem_path) : NULL;
 638         cmd_src = g_strdup_printf("-machine virt,accel=%s,gic-version=max "
 639                                   "-name vmsource,debug-threads=on -cpu max "
 640                                   "-m 150M -serial file:%s/src_serial "
 641                                   "-kernel %s %s %s",
 642                                   accel, tmpfs, bootpath,
 643                                   extra_opts ? extra_opts : "", opts_src);
 644         cmd_dst = g_strdup_printf("-machine virt,accel=%s,gic-version=max "
 645                                   "-name vmdest,debug-threads=on -cpu max "
 646                                   "-m 150M -serial file:%s/dest_serial "
 647                                   "-kernel %s "
 648                                   "-incoming %s %s %s",
 649                                   accel, tmpfs, bootpath, uri,
 650                                   extra_opts ? extra_opts : "", opts_dst);
 651
 652         start_address = ARM_TEST_MEM_START;
 653         end_address = ARM_TEST_MEM_END;
 654
 655         g_assert(sizeof(aarch64_kernel) <= ARM_TEST_MAX_KERNEL_SIZE);
 656     } else {
 657         g_assert_not_reached();
 658     }
 659
 660     g_free(bootpath);
 661     g_free(extra_opts);
 662
 663     if (hide_stderr) {
 664         gchar *tmp;
 665         tmp = g_strdup_printf("%s 2>/dev/null", cmd_src);
 666         g_free(cmd_src);
 667         cmd_src = tmp;
 668
 669         tmp = g_strdup_printf("%s 2>/dev/null", cmd_dst);
 670         g_free(cmd_dst);
 671         cmd_dst = tmp;
 672     }
 673
 674     *from = qtest_init(cmd_src);
 675     g_free(cmd_src);
 676
 677     *to = qtest_init(cmd_dst);
 678     g_free(cmd_dst);
 679
 680     /*
 681      * Remove shmem file immediately to avoid memory leak in test failed case.
 682      * It's valid becase QEMU has already opened this file
 683      */
 684     if (use_shmem) {
 685         unlink(shmem_path);
 686         g_free(shmem_path);
 687     }
 688
 689     return 0;
 690 }
 691
 692 static void test_migrate_end(QTestState *from, QTestState *to, bool test_dest)
 693 {
 694     unsigned char dest_byte_a, dest_byte_b, dest_byte_c, dest_byte_d;
 695
 696     qtest_quit(from);
 697
 698     if (test_dest) {
 699         qtest_memread(to, start_address, &dest_byte_a, 1);
 700
 701         /* Destination still running, wait for a byte to change */
 702         do {
 703             qtest_memread(to, start_address, &dest_byte_b, 1);
 704             usleep(1000 * 10);
 705         } while (dest_byte_a == dest_byte_b);
 706
 707         qtest_qmp_discard_response(to, "{ 'execute' : 'stop'}");
 708
 709         /* With it stopped, check nothing changes */
 710         qtest_memread(to, start_address, &dest_byte_c, 1);
 711         usleep(1000 * 200);
 712         qtest_memread(to, start_address, &dest_byte_d, 1);
 713         g_assert_cmpint(dest_byte_c, ==, dest_byte_d);
 714
 715         check_guests_ram(to);
 716     }
 717
 718     qtest_quit(to);
 719
 720     cleanup("bootsect");
 721     cleanup("migsocket");
 722     cleanup("src_serial");
 723     cleanup("dest_serial");
 724 }
 725
 726 static void deprecated_set_downtime(QTestState *who, const double value)
 727 {
 728     QDict *rsp;
 729
 730     rsp = qtest_qmp(who,
 731                     "{ 'execute': 'migrate_set_downtime',"
 732                     " 'arguments': { 'value': %f } }", value);
 733     g_assert(qdict_haskey(rsp, "return"));
 734     qobject_unref(rsp);
 735     migrate_check_parameter_int(who, "downtime-limit", value * 1000);
 736 }
 737
 738 static void deprecated_set_speed(QTestState *who, long long value)
 739 {
 740     QDict *rsp;
 741
 742     rsp = qtest_qmp(who, "{ 'execute': 'migrate_set_speed',"
 743                           "'arguments': { 'value': %lld } }", value);
 744     g_assert(qdict_haskey(rsp, "return"));
 745     qobject_unref(rsp);
 746     migrate_check_parameter_int(who, "max-bandwidth", value);
 747 }
 748
 749 static void deprecated_set_cache_size(QTestState *who, long long value)
 750 {
 751     QDict *rsp;
 752
 753     rsp = qtest_qmp(who, "{ 'execute': 'migrate-set-cache-size',"
 754                          "'arguments': { 'value': %lld } }", value);
 755     g_assert(qdict_haskey(rsp, "return"));
 756     qobject_unref(rsp);
 757     migrate_check_parameter_int(who, "xbzrle-cache-size", value);
 758 }
 759
 760 static void test_deprecated(void)
 761 {
 762     QTestState *from;
 763
 764     from = qtest_init("-machine none");
 765
 766     deprecated_set_downtime(from, 0.12345);
 767     deprecated_set_speed(from, 12345);
 768     deprecated_set_cache_size(from, 4096);
 769
 770     qtest_quit(from);
 771 }
 772
 773 static int migrate_postcopy_prepare(QTestState **from_ptr,
 774                                      QTestState **to_ptr,
 775                                      bool hide_error)
 776 {
 777     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 778     QTestState *from, *to;
 779
 780     if (test_migrate_start(&from, &to, uri, hide_error, false, NULL, NULL)) {
 781         return -1;
 782     }
 783
 784     migrate_set_capability(from, "postcopy-ram", true);
 785     migrate_set_capability(to, "postcopy-ram", true);
 786     migrate_set_capability(to, "postcopy-blocktime", true);
 787
 788     /* We want to pick a speed slow enough that the test completes
 789      * quickly, but that it doesn't complete precopy even on a slow
 790      * machine, so also set the downtime.
 791      */
 792     migrate_set_parameter_int(from, "max-bandwidth", 30000000);
 793     migrate_set_parameter_int(from, "downtime-limit", 1);
 794
 795     /* Wait for the first serial output from the source */
 796     wait_for_serial("src_serial");
 797
 798     migrate(from, uri, "{}");
 799     g_free(uri);
 800
 801     wait_for_migration_pass(from);
 802
 803     *from_ptr = from;
 804     *to_ptr = to;
 805
 806     return 0;
 807 }
 808
 809 static void migrate_postcopy_complete(QTestState *from, QTestState *to)
 810 {
 811     wait_for_migration_complete(from);
 812
 813     /* Make sure we get at least one "B" on destination */
 814     wait_for_serial("dest_serial");
 815
 816     if (uffd_feature_thread_id) {
 817         read_blocktime(to);
 818     }
 819
 820     test_migrate_end(from, to, true);
 821 }
 822
 823 static void test_postcopy(void)
 824 {
 825     QTestState *from, *to;
 826
 827     if (migrate_postcopy_prepare(&from, &to, false)) {
 828         return;
 829     }
 830     migrate_postcopy_start(from, to);
 831     migrate_postcopy_complete(from, to);
 832 }
 833
 834 static void test_postcopy_recovery(void)
 835 {
 836     QTestState *from, *to;
 837     char *uri;
 838
 839     if (migrate_postcopy_prepare(&from, &to, true)) {
 840         return;
 841     }
 842
 843     /* Turn postcopy speed down, 4K/s is slow enough on any machines */
 844     migrate_set_parameter_int(from, "max-postcopy-bandwidth", 4096);
 845
 846     /* Now we start the postcopy */
 847     migrate_postcopy_start(from, to);
 848
 849     /*
 850      * Wait until postcopy is really started; we can only run the
 851      * migrate-pause command during a postcopy
 852      */
 853     wait_for_migration_status(from, "postcopy-active", NULL);
 854
 855     /*
 856      * Manually stop the postcopy migration. This emulates a network
 857      * failure with the migration socket
 858      */
 859     migrate_pause(from);
 860
 861     /*
 862      * Wait for destination side to reach postcopy-paused state.  The
 863      * migrate-recover command can only succeed if destination machine
 864      * is in the paused state
 865      */
 866     wait_for_migration_status(to, "postcopy-paused",
 867                               (const char * []) { "failed", "active",
 868                                                   "completed", NULL });
 869
 870     /*
 871      * Create a new socket to emulate a new channel that is different
 872      * from the broken migration channel; tell the destination to
 873      * listen to the new port
 874      */
 875     uri = g_strdup_printf("unix:%s/migsocket-recover", tmpfs);
 876     migrate_recover(to, uri);
 877
 878     /*
 879      * Try to rebuild the migration channel using the resume flag and
 880      * the newly created channel
 881      */
 882     wait_for_migration_status(from, "postcopy-paused",
 883                               (const char * []) { "failed", "active",
 884                                                   "completed", NULL });
 885     migrate(from, uri, "{'resume': true}");
 886     g_free(uri);
 887
 888     /* Restore the postcopy bandwidth to unlimited */
 889     migrate_set_parameter_int(from, "max-postcopy-bandwidth", 0);
 890
 891     migrate_postcopy_complete(from, to);
 892 }
 893
 894 static void wait_for_migration_fail(QTestState *from, bool allow_active)
 895 {
 896     QDict *rsp_return;
 897     char *status;
 898     bool failed;
 899
 900     do {
 901         status = migrate_query_status(from);
 902         bool result = !strcmp(status, "setup") || !strcmp(status, "failed") ||
 903                  (allow_active && !strcmp(status, "active"));
 904         if (!result) {
 905             fprintf(stderr, "%s: unexpected status status=%s allow_active=%d\n",
 906                     __func__, status, allow_active);
 907         }
 908         g_assert(result);
 909         failed = !strcmp(status, "failed");
 910         g_free(status);
 911     } while (!failed);
 912
 913     /* Is the machine currently running? */
 914     rsp_return = wait_command(from, "{ 'execute': 'query-status' }");
 915     g_assert(qdict_haskey(rsp_return, "running"));
 916     g_assert(qdict_get_bool(rsp_return, "running"));
 917     qobject_unref(rsp_return);
 918 }
 919
 920 static void test_baddest(void)
 921 {
 922     QTestState *from, *to;
 923
 924     if (test_migrate_start(&from, &to, "tcp:0:0", true, false, NULL, NULL)) {
 925         return;
 926     }
 927     migrate(from, "tcp:0:0", "{}");
 928     wait_for_migration_fail(from, false);
 929     test_migrate_end(from, to, false);
 930 }
 931
 932 static void test_precopy_unix(void)
 933 {
 934     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 935     QTestState *from, *to;
 936
 937     if (test_migrate_start(&from, &to, uri, false, false, NULL, NULL)) {
 938         return;
 939     }
 940
 941     /* We want to pick a speed slow enough that the test completes
 942      * quickly, but that it doesn't complete precopy even on a slow
 943      * machine, so also set the downtime.
 944      */
 945     /* 1 ms should make it not converge*/
 946     migrate_set_parameter_int(from, "downtime-limit", 1);
 947     /* 1GB/s */
 948     migrate_set_parameter_int(from, "max-bandwidth", 1000000000);
 949
 950     /* Wait for the first serial output from the source */
 951     wait_for_serial("src_serial");
 952
 953     migrate(from, uri, "{}");
 954
 955     wait_for_migration_pass(from);
 956
 957     /* 300 ms should converge */
 958     migrate_set_parameter_int(from, "downtime-limit", 300);
 959
 960     if (!got_stop) {
 961         qtest_qmp_eventwait(from, "STOP");
 962     }
 963
 964     qtest_qmp_eventwait(to, "RESUME");
 965
 966     wait_for_serial("dest_serial");
 967     wait_for_migration_complete(from);
 968
 969     test_migrate_end(from, to, true);
 970     g_free(uri);
 971 }
 972
 973 #if 0
 974 /* Currently upset on aarch64 TCG */
 975 static void test_ignore_shared(void)
 976 {
 977     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 978     QTestState *from, *to;
 979
 980     if (test_migrate_start(&from, &to, uri, false, true, NULL, NULL)) {
 981         return;
 982     }
 983
 984     migrate_set_capability(from, "x-ignore-shared", true);
 985     migrate_set_capability(to, "x-ignore-shared", true);
 986
 987     /* Wait for the first serial output from the source */
 988     wait_for_serial("src_serial");
 989
 990     migrate(from, uri, "{}");
 991
 992     wait_for_migration_pass(from);
 993
 994     if (!got_stop) {
 995         qtest_qmp_eventwait(from, "STOP");
 996     }
 997
 998     qtest_qmp_eventwait(to, "RESUME");
 999
1000     wait_for_serial("dest_serial");
1001     wait_for_migration_complete(from);
1002
1003     /* Check whether shared RAM has been really skipped */
1004     g_assert_cmpint(read_ram_property_int(from, "transferred"), <, 1024 * 1024);
1005
1006     test_migrate_end(from, to, true);
1007     g_free(uri);
1008 }
1009 #endif
1010
1011 static void test_xbzrle(const char *uri)
1012 {
1013     QTestState *from, *to;
1014
1015     if (test_migrate_start(&from, &to, uri, false, false, NULL, NULL)) {
1016         return;
1017     }
1018
1019     /*
1020      * We want to pick a speed slow enough that the test completes
1021      * quickly, but that it doesn't complete precopy even on a slow
1022      * machine, so also set the downtime.
1023      */
1024     /* 1 ms should make it not converge*/
1025     migrate_set_parameter_int(from, "downtime-limit", 1);
1026     /* 1GB/s */
1027     migrate_set_parameter_int(from, "max-bandwidth", 1000000000);
1028
1029     migrate_set_parameter_int(from, "xbzrle-cache-size", 33554432);
1030
1031     migrate_set_capability(from, "xbzrle", "true");
1032     migrate_set_capability(to, "xbzrle", "true");
1033     /* Wait for the first serial output from the source */
1034     wait_for_serial("src_serial");
1035
1036     migrate(from, uri, "{}");
1037
1038     wait_for_migration_pass(from);
1039
1040     /* 300ms should converge */
1041     migrate_set_parameter_int(from, "downtime-limit", 300);
1042
1043     if (!got_stop) {
1044         qtest_qmp_eventwait(from, "STOP");
1045     }
1046     qtest_qmp_eventwait(to, "RESUME");
1047
1048     wait_for_serial("dest_serial");
1049     wait_for_migration_complete(from);
1050
1051     test_migrate_end(from, to, true);
1052 }
1053
1054 static void test_xbzrle_unix(void)
1055 {
1056     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
1057
1058     test_xbzrle(uri);
1059     g_free(uri);
1060 }
1061
1062 static void test_precopy_tcp(void)
1063 {
1064     char *uri;
1065     QTestState *from, *to;
1066
1067     if (test_migrate_start(&from, &to, "tcp:127.0.0.1:0", false, false,
1068                            NULL, NULL)) {
1069         return;
1070     }
1071
1072     /*
1073      * We want to pick a speed slow enough that the test completes
1074      * quickly, but that it doesn't complete precopy even on a slow
1075      * machine, so also set the downtime.
1076      */
1077     /* 1 ms should make it not converge*/
1078     migrate_set_parameter_int(from, "downtime-limit", 1);
1079     /* 1GB/s */
1080     migrate_set_parameter_int(from, "max-bandwidth", 1000000000);
1081
1082     /* Wait for the first serial output from the source */
1083     wait_for_serial("src_serial");
1084
1085     uri = migrate_get_socket_address(to, "socket-address");
1086
1087     migrate(from, uri, "{}");
1088
1089     wait_for_migration_pass(from);
1090
1091     /* 300ms should converge */
1092     migrate_set_parameter_int(from, "downtime-limit", 300);
1093
1094     if (!got_stop) {
1095         qtest_qmp_eventwait(from, "STOP");
1096     }
1097     qtest_qmp_eventwait(to, "RESUME");
1098
1099     wait_for_serial("dest_serial");
1100     wait_for_migration_complete(from);
1101
1102     test_migrate_end(from, to, true);
1103     g_free(uri);
1104 }
1105
1106 static void test_migrate_fd_proto(void)
1107 {
1108     QTestState *from, *to;
1109     int ret;
1110     int pair[2];
1111     QDict *rsp;
1112     const char *error_desc;
1113
1114     if (test_migrate_start(&from, &to, "defer", false, false, NULL, NULL)) {
1115         return;
1116     }
1117
1118     /*
1119      * We want to pick a speed slow enough that the test completes
1120      * quickly, but that it doesn't complete precopy even on a slow
1121      * machine, so also set the downtime.
1122      */
1123     /* 1 ms should make it not converge */
1124     migrate_set_parameter_int(from, "downtime-limit", 1);
1125     /* 1GB/s */
1126     migrate_set_parameter_int(from, "max-bandwidth", 1000000000);
1127
1128     /* Wait for the first serial output from the source */
1129     wait_for_serial("src_serial");
1130
1131     /* Create two connected sockets for migration */
1132     ret = socketpair(PF_LOCAL, SOCK_STREAM, 0, pair);
1133     g_assert_cmpint(ret, ==, 0);
1134
1135     /* Send the 1st socket to the target */
1136     rsp = wait_command_fd(to, pair[0],
1137                           "{ 'execute': 'getfd',"
1138                           "  'arguments': { 'fdname': 'fd-mig' }}");
1139     qobject_unref(rsp);
1140     close(pair[0]);
1141
1142     /* Start incoming migration from the 1st socket */
1143     rsp = wait_command(to, "{ 'execute': 'migrate-incoming',"
1144                            "  'arguments': { 'uri': 'fd:fd-mig' }}");
1145     qobject_unref(rsp);
1146
1147     /* Send the 2nd socket to the target */
1148     rsp = wait_command_fd(from, pair[1],
1149                           "{ 'execute': 'getfd',"
1150                           "  'arguments': { 'fdname': 'fd-mig' }}");
1151     qobject_unref(rsp);
1152     close(pair[1]);
1153
1154     /* Start migration to the 2nd socket*/
1155     migrate(from, "fd:fd-mig", "{}");
1156
1157     wait_for_migration_pass(from);
1158
1159     /* 300ms should converge */
1160     migrate_set_parameter_int(from, "downtime-limit", 300);
1161
1162     if (!got_stop) {
1163         qtest_qmp_eventwait(from, "STOP");
1164     }
1165     qtest_qmp_eventwait(to, "RESUME");
1166
1167     /* Test closing fds */
1168     /* We assume, that QEMU removes named fd from its list,
1169      * so this should fail */
1170     rsp = qtest_qmp(from, "{ 'execute': 'closefd',"
1171                           "  'arguments': { 'fdname': 'fd-mig' }}");
1172     g_assert_true(qdict_haskey(rsp, "error"));
1173     error_desc = qdict_get_str(qdict_get_qdict(rsp, "error"), "desc");
1174     g_assert_cmpstr(error_desc, ==, "File descriptor named 'fd-mig' not found");
1175     qobject_unref(rsp);
1176
1177     rsp = qtest_qmp(to, "{ 'execute': 'closefd',"
1178                         "  'arguments': { 'fdname': 'fd-mig' }}");
1179     g_assert_true(qdict_haskey(rsp, "error"));
1180     error_desc = qdict_get_str(qdict_get_qdict(rsp, "error"), "desc");
1181     g_assert_cmpstr(error_desc, ==, "File descriptor named 'fd-mig' not found");
1182     qobject_unref(rsp);
1183
1184     /* Complete migration */
1185     wait_for_serial("dest_serial");
1186     wait_for_migration_complete(from);
1187     test_migrate_end(from, to, true);
1188 }
1189
1190 static void do_test_validate_uuid(const char *uuid_arg_src,
1191                                   const char *uuid_arg_dst,
1192                                   bool should_fail, bool hide_stderr)
1193 {
1194     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
1195     QTestState *from, *to;
1196
1197     if (test_migrate_start(&from, &to, uri, hide_stderr, false,
1198                            uuid_arg_src, uuid_arg_dst)) {
1199         return;
1200     }
1201
1202     /*
1203      * UUID validation is at the begin of migration. So, the main process of
1204      * migration is not interesting for us here. Thus, set huge downtime for
1205      * very fast migration.
1206      */
1207     migrate_set_parameter_int(from, "downtime-limit", 1000000);
1208     migrate_set_capability(from, "validate-uuid", true);
1209
1210     /* Wait for the first serial output from the source */
1211     wait_for_serial("src_serial");
1212
1213     migrate(from, uri, "{}");
1214
1215     if (should_fail) {
1216         qtest_set_expected_status(to, 1);
1217         wait_for_migration_fail(from, true);
1218     } else {
1219         wait_for_migration_complete(from);
1220     }
1221
1222     test_migrate_end(from, to, false);
1223     g_free(uri);
1224 }
1225
1226 static void test_validate_uuid(void)
1227 {
1228     do_test_validate_uuid("-uuid 11111111-1111-1111-1111-111111111111",
1229                           "-uuid 11111111-1111-1111-1111-111111111111",
1230                           false, false);
1231 }
1232
1233 static void test_validate_uuid_error(void)
1234 {
1235     do_test_validate_uuid("-uuid 11111111-1111-1111-1111-111111111111",
1236                           "-uuid 22222222-2222-2222-2222-222222222222",
1237                           true, true);
1238 }
1239
1240 static void test_validate_uuid_src_not_set(void)
1241 {
1242     do_test_validate_uuid(NULL, "-uuid 11111111-1111-1111-1111-111111111111",
1243                           false, true);
1244 }
1245
1246 static void test_validate_uuid_dst_not_set(void)
1247 {
1248     do_test_validate_uuid("-uuid 11111111-1111-1111-1111-111111111111", NULL,
1249                           false, true);
1250 }
1251
1252 static void test_migrate_auto_converge(void)
1253 {
1254     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
1255     QTestState *from, *to;
1256     int64_t remaining, percentage;
1257
1258     /*
1259      * We want the test to be stable and as fast as possible.
1260      * E.g., with 1Gb/s bandwith migration may pass without throttling,
1261      * so we need to decrease a bandwidth.
1262      */
1263     const int64_t init_pct = 5, inc_pct = 50, max_pct = 95;
1264     const int64_t max_bandwidth = 400000000; /* ~400Mb/s */
1265     const int64_t downtime_limit = 250; /* 250ms */
1266     /*
1267      * We migrate through unix-socket (> 500Mb/s).
1268      * Thus, expected migration speed ~= bandwidth limit (< 500Mb/s).
1269      * So, we can predict expected_threshold
1270      */
1271     const int64_t expected_threshold = max_bandwidth * downtime_limit / 1000;
1272
1273     if (test_migrate_start(&from, &to, uri, false, false, NULL, NULL)) {
1274         return;
1275     }
1276
1277     migrate_set_capability(from, "auto-converge", true);
1278     migrate_set_parameter_int(from, "cpu-throttle-initial", init_pct);
1279     migrate_set_parameter_int(from, "cpu-throttle-increment", inc_pct);
1280     migrate_set_parameter_int(from, "max-cpu-throttle", max_pct);
1281
1282     /*
1283      * Set the initial parameters so that the migration could not converge
1284      * without throttling.
1285      */
1286     migrate_set_parameter_int(from, "downtime-limit", 1);
1287     migrate_set_parameter_int(from, "max-bandwidth", 100000000); /* ~100Mb/s */
1288
1289     /* To check remaining size after precopy */
1290     migrate_set_capability(from, "pause-before-switchover", true);
1291
1292     /* Wait for the first serial output from the source */
1293     wait_for_serial("src_serial");
1294
1295     migrate(from, uri, "{}");
1296
1297     /* Wait for throttling begins */
1298     percentage = 0;
1299     while (percentage == 0) {
1300         percentage = read_migrate_property_int(from, "cpu-throttle-percentage");
1301         usleep(100);
1302         g_assert_false(got_stop);
1303     }
1304     /* The first percentage of throttling should be equal to init_pct */
1305     g_assert_cmpint(percentage, ==, init_pct);
1306     /* Now, when we tested that throttling works, let it converge */
1307     migrate_set_parameter_int(from, "downtime-limit", downtime_limit);
1308     migrate_set_parameter_int(from, "max-bandwidth", max_bandwidth);
1309
1310     /*
1311      * Wait for pre-switchover status to check last throttle percentage
1312      * and remaining. These values will be zeroed later
1313      */
1314     wait_for_migration_status(from, "pre-switchover", NULL);
1315
1316     /* The final percentage of throttling shouldn't be greater than max_pct */
1317     percentage = read_migrate_property_int(from, "cpu-throttle-percentage");
1318     g_assert_cmpint(percentage, <=, max_pct);
1319
1320     remaining = read_ram_property_int(from, "remaining");
1321     g_assert_cmpint(remaining, <, expected_threshold);
1322
1323     migrate_continue(from, "pre-switchover");
1324
1325     qtest_qmp_eventwait(to, "RESUME");
1326
1327     wait_for_serial("dest_serial");
1328     wait_for_migration_complete(from);
1329
1330     g_free(uri);
1331
1332     test_migrate_end(from, to, true);
1333 }
1334
1335 int main(int argc, char **argv)
1336 {
1337     char template[] = "/tmp/migration-test-XXXXXX";
1338     int ret;
1339
1340     g_test_init(&argc, &argv, NULL);
1341
1342     if (!ufd_version_check()) {
1343         return g_test_run();
1344     }
1345
1346     /*
1347      * On ppc64, the test only works with kvm-hv, but not with kvm-pr and TCG
1348      * is touchy due to race conditions on dirty bits (especially on PPC for
1349      * some reason)
1350      */
1351     if (g_str_equal(qtest_get_arch(), "ppc64") &&
1352         access("/sys/module/kvm_hv", F_OK)) {
1353         g_test_message("Skipping test: kvm_hv not available");
1354         return g_test_run();
1355     }
1356
1357     /*
1358      * Similar to ppc64, s390x seems to be touchy with TCG, so disable it
1359      * there until the problems are resolved
1360      */
1361     if (g_str_equal(qtest_get_arch(), "s390x")) {
1362 #if defined(HOST_S390X)
1363         if (access("/dev/kvm", R_OK | W_OK)) {
1364             g_test_message("Skipping test: kvm not available");
1365             return g_test_run();
1366         }
1367 #else
1368         g_test_message("Skipping test: Need s390x host to work properly");
1369         return g_test_run();
1370 #endif
1371     }
1372
1373     tmpfs = mkdtemp(template);
1374     if (!tmpfs) {
1375         g_test_message("mkdtemp on path (%s): %s", template, strerror(errno));
1376     }
1377     g_assert(tmpfs);
1378
1379     module_call_init(MODULE_INIT_QOM);
1380
1381     qtest_add_func("/migration/postcopy/unix", test_postcopy);
1382     qtest_add_func("/migration/postcopy/recovery", test_postcopy_recovery);
1383     qtest_add_func("/migration/deprecated", test_deprecated);
1384     qtest_add_func("/migration/bad_dest", test_baddest);
1385     qtest_add_func("/migration/precopy/unix", test_precopy_unix);
1386     qtest_add_func("/migration/precopy/tcp", test_precopy_tcp);
1387     /* qtest_add_func("/migration/ignore_shared", test_ignore_shared); */
1388     qtest_add_func("/migration/xbzrle/unix", test_xbzrle_unix);
1389     qtest_add_func("/migration/fd_proto", test_migrate_fd_proto);
1390     qtest_add_func("/migration/validate_uuid", test_validate_uuid);
1391     qtest_add_func("/migration/validate_uuid_error", test_validate_uuid_error);
1392     qtest_add_func("/migration/validate_uuid_src_not_set",
1393                    test_validate_uuid_src_not_set);
1394     qtest_add_func("/migration/validate_uuid_dst_not_set",
1395                    test_validate_uuid_dst_not_set);
1396
1397     qtest_add_func("/migration/auto_converge", test_migrate_auto_converge);
1398
1399     ret = g_test_run();
1400
1401     g_assert_cmpint(ret, ==, 0);
1402
1403     ret = rmdir(tmpfs);
1404     if (ret != 0) {
1405         g_test_message("unable to rmdir: path (%s): %s",
1406                        tmpfs, strerror(errno));
1407     }
1408
1409     return ret;
1410 }