tests/migration-test.c

   1 /*
   2  * QTest testcase for migration
   3  *
   4  * Copyright (c) 2016-2018 Red Hat, Inc. and/or its affiliates
   5  *   based on the vhost-user-test.c that is:
   6  *      Copyright (c) 2014 Virtual Open Systems Sarl.
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   9  * See the COPYING file in the top-level directory.
  10  *
  11  */
  12
  13 #include "qemu/osdep.h"
  14
  15 #include "libqtest.h"
  16 #include "qapi/qmp/qdict.h"
  17 #include "qemu/module.h"
  18 #include "qemu/option.h"
  19 #include "qemu/range.h"
  20 #include "qemu/sockets.h"
  21 #include "chardev/char.h"
  22 #include "qapi/qapi-visit-sockets.h"
  23 #include "qapi/qobject-input-visitor.h"
  24 #include "qapi/qobject-output-visitor.h"
  25
  26 #include "migration-helpers.h"
  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 static bool uffd_feature_thread_id;
  35
  36 #if defined(__linux__)
  37 #include <sys/syscall.h>
  38 #include <sys/vfs.h>
  39 #endif
  40
  41 #if defined(__linux__) && defined(__NR_userfaultfd) && defined(CONFIG_EVENTFD)
  42 #include <sys/eventfd.h>
  43 #include <sys/ioctl.h>
  44 #include <linux/userfaultfd.h>
  45
  46 static bool ufd_version_check(void)
  47 {
  48     struct uffdio_api api_struct;
  49     uint64_t ioctl_mask;
  50
  51     int ufd = syscall(__NR_userfaultfd, O_CLOEXEC);
  52
  53     if (ufd == -1) {
  54         g_test_message("Skipping test: userfaultfd not available");
  55         return false;
  56     }
  57
  58     api_struct.api = UFFD_API;
  59     api_struct.features = 0;
  60     if (ioctl(ufd, UFFDIO_API, &api_struct)) {
  61         g_test_message("Skipping test: UFFDIO_API failed");
  62         return false;
  63     }
  64     uffd_feature_thread_id = api_struct.features & UFFD_FEATURE_THREAD_ID;
  65
  66     ioctl_mask = (__u64)1 << _UFFDIO_REGISTER |
  67                  (__u64)1 << _UFFDIO_UNREGISTER;
  68     if ((api_struct.ioctls & ioctl_mask) != ioctl_mask) {
  69         g_test_message("Skipping test: Missing userfault feature");
  70         return false;
  71     }
  72
  73     return true;
  74 }
  75
  76 #else
  77 static bool ufd_version_check(void)
  78 {
  79     g_test_message("Skipping test: Userfault not available (builtdtime)");
  80     return false;
  81 }
  82
  83 #endif
  84
  85 static const char *tmpfs;
  86
  87 /* The boot file modifies memory area in [start_address, end_address)
  88  * repeatedly. It outputs a 'B' at a fixed rate while it's still running.
  89  */
  90 #include "tests/migration/i386/a-b-bootblock.h"
  91 #include "tests/migration/aarch64/a-b-kernel.h"
  92 #include "tests/migration/s390x/a-b-bios.h"
  93
  94 static void init_bootfile(const char *bootpath, void *content, size_t len)
  95 {
  96     FILE *bootfile = fopen(bootpath, "wb");
  97
  98     g_assert_cmpint(fwrite(content, len, 1, bootfile), ==, 1);
  99     fclose(bootfile);
 100 }
 101
 102 /*
 103  * Wait for some output in the serial output file,
 104  * we get an 'A' followed by an endless string of 'B's
 105  * but on the destination we won't have the A.
 106  */
 107 static void wait_for_serial(const char *side)
 108 {
 109     char *serialpath = g_strdup_printf("%s/%s", tmpfs, side);
 110     FILE *serialfile = fopen(serialpath, "r");
 111     const char *arch = qtest_get_arch();
 112     int started = (strcmp(side, "src_serial") == 0 &&
 113                    strcmp(arch, "ppc64") == 0) ? 0 : 1;
 114
 115     g_free(serialpath);
 116     do {
 117         int readvalue = fgetc(serialfile);
 118
 119         if (!started) {
 120             /* SLOF prints its banner before starting test,
 121              * to ignore it, mark the start of the test with '_',
 122              * ignore all characters until this marker
 123              */
 124             switch (readvalue) {
 125             case '_':
 126                 started = 1;
 127                 break;
 128             case EOF:
 129                 fseek(serialfile, 0, SEEK_SET);
 130                 usleep(1000);
 131                 break;
 132             }
 133             continue;
 134         }
 135         switch (readvalue) {
 136         case 'A':
 137             /* Fine */
 138             break;
 139
 140         case 'B':
 141             /* It's alive! */
 142             fclose(serialfile);
 143             return;
 144
 145         case EOF:
 146             started = (strcmp(side, "src_serial") == 0 &&
 147                        strcmp(arch, "ppc64") == 0) ? 0 : 1;
 148             fseek(serialfile, 0, SEEK_SET);
 149             usleep(1000);
 150             break;
 151
 152         default:
 153             fprintf(stderr, "Unexpected %d on %s serial\n", readvalue, side);
 154             g_assert_not_reached();
 155         }
 156     } while (true);
 157 }
 158
 159 /*
 160  * It's tricky to use qemu's migration event capability with qtest,
 161  * events suddenly appearing confuse the qmp()/hmp() responses.
 162  */
 163
 164 static int64_t read_ram_property_int(QTestState *who, const char *property)
 165 {
 166     QDict *rsp_return, *rsp_ram;
 167     int64_t result;
 168
 169     rsp_return = migrate_query(who);
 170     if (!qdict_haskey(rsp_return, "ram")) {
 171         /* Still in setup */
 172         result = 0;
 173     } else {
 174         rsp_ram = qdict_get_qdict(rsp_return, "ram");
 175         result = qdict_get_try_int(rsp_ram, property, 0);
 176     }
 177     qobject_unref(rsp_return);
 178     return result;
 179 }
 180
 181 static int64_t read_migrate_property_int(QTestState *who, const char *property)
 182 {
 183     QDict *rsp_return;
 184     int64_t result;
 185
 186     rsp_return = migrate_query(who);
 187     result = qdict_get_try_int(rsp_return, property, 0);
 188     qobject_unref(rsp_return);
 189     return result;
 190 }
 191
 192 static uint64_t get_migration_pass(QTestState *who)
 193 {
 194     return read_ram_property_int(who, "dirty-sync-count");
 195 }
 196
 197 static void read_blocktime(QTestState *who)
 198 {
 199     QDict *rsp_return;
 200
 201     rsp_return = migrate_query(who);
 202     g_assert(qdict_haskey(rsp_return, "postcopy-blocktime"));
 203     qobject_unref(rsp_return);
 204 }
 205
 206 static void wait_for_migration_pass(QTestState *who)
 207 {
 208     uint64_t initial_pass = get_migration_pass(who);
 209     uint64_t pass;
 210
 211     /* Wait for the 1st sync */
 212     while (!got_stop && !initial_pass) {
 213         usleep(1000);
 214         initial_pass = get_migration_pass(who);
 215     }
 216
 217     do {
 218         usleep(1000);
 219         pass = get_migration_pass(who);
 220     } while (pass == initial_pass && !got_stop);
 221 }
 222
 223 static void check_guests_ram(QTestState *who)
 224 {
 225     /* Our ASM test will have been incrementing one byte from each page from
 226      * start_address to < end_address in order. This gives us a constraint
 227      * that any page's byte should be equal or less than the previous pages
 228      * byte (mod 256); and they should all be equal except for one transition
 229      * at the point where we meet the incrementer. (We're running this with
 230      * the guest stopped).
 231      */
 232     unsigned address;
 233     uint8_t first_byte;
 234     uint8_t last_byte;
 235     bool hit_edge = false;
 236     int bad = 0;
 237
 238     qtest_memread(who, start_address, &first_byte, 1);
 239     last_byte = first_byte;
 240
 241     for (address = start_address + TEST_MEM_PAGE_SIZE; address < end_address;
 242          address += TEST_MEM_PAGE_SIZE)
 243     {
 244         uint8_t b;
 245         qtest_memread(who, address, &b, 1);
 246         if (b != last_byte) {
 247             if (((b + 1) % 256) == last_byte && !hit_edge) {
 248                 /* This is OK, the guest stopped at the point of
 249                  * incrementing the previous page but didn't get
 250                  * to us yet.
 251                  */
 252                 hit_edge = true;
 253                 last_byte = b;
 254             } else {
 255                 bad++;
 256                 if (bad <= 10) {
 257                     fprintf(stderr, "Memory content inconsistency at %x"
 258                             " first_byte = %x last_byte = %x current = %x"
 259                             " hit_edge = %x\n",
 260                             address, first_byte, last_byte, b, hit_edge);
 261                 }
 262             }
 263         }
 264     }
 265     if (bad >= 10) {
 266         fprintf(stderr, "and in another %d pages", bad - 10);
 267     }
 268     g_assert(bad == 0);
 269 }
 270
 271 static void cleanup(const char *filename)
 272 {
 273     char *path = g_strdup_printf("%s/%s", tmpfs, filename);
 274
 275     unlink(path);
 276     g_free(path);
 277 }
 278
 279 static char *SocketAddress_to_str(SocketAddress *addr)
 280 {
 281     switch (addr->type) {
 282     case SOCKET_ADDRESS_TYPE_INET:
 283         return g_strdup_printf("tcp:%s:%s",
 284                                addr->u.inet.host,
 285                                addr->u.inet.port);
 286     case SOCKET_ADDRESS_TYPE_UNIX:
 287         return g_strdup_printf("unix:%s",
 288                                addr->u.q_unix.path);
 289     case SOCKET_ADDRESS_TYPE_FD:
 290         return g_strdup_printf("fd:%s", addr->u.fd.str);
 291     case SOCKET_ADDRESS_TYPE_VSOCK:
 292         return g_strdup_printf("tcp:%s:%s",
 293                                addr->u.vsock.cid,
 294                                addr->u.vsock.port);
 295     default:
 296         return g_strdup("unknown address type");
 297     }
 298 }
 299
 300 static char *migrate_get_socket_address(QTestState *who, const char *parameter)
 301 {
 302     QDict *rsp;
 303     char *result;
 304     Error *local_err = NULL;
 305     SocketAddressList *addrs;
 306     Visitor *iv = NULL;
 307     QObject *object;
 308
 309     rsp = migrate_query(who);
 310     object = qdict_get(rsp, parameter);
 311
 312     iv = qobject_input_visitor_new(object);
 313     visit_type_SocketAddressList(iv, NULL, &addrs, &local_err);
 314     visit_free(iv);
 315
 316     /* we are only using a single address */
 317     result = SocketAddress_to_str(addrs->value);
 318
 319     qapi_free_SocketAddressList(addrs);
 320     qobject_unref(rsp);
 321     return result;
 322 }
 323
 324 static long long migrate_get_parameter_int(QTestState *who,
 325                                            const char *parameter)
 326 {
 327     QDict *rsp;
 328     long long result;
 329
 330     rsp = wait_command(who, "{ 'execute': 'query-migrate-parameters' }");
 331     result = qdict_get_int(rsp, parameter);
 332     qobject_unref(rsp);
 333     return result;
 334 }
 335
 336 static void migrate_check_parameter_int(QTestState *who, const char *parameter,
 337                                         long long value)
 338 {
 339     long long result;
 340
 341     result = migrate_get_parameter_int(who, parameter);
 342     g_assert_cmpint(result, ==, value);
 343 }
 344
 345 static void migrate_set_parameter_int(QTestState *who, const char *parameter,
 346                                       long long value)
 347 {
 348     QDict *rsp;
 349
 350     rsp = qtest_qmp(who,
 351                     "{ 'execute': 'migrate-set-parameters',"
 352                     "'arguments': { %s: %lld } }",
 353                     parameter, value);
 354     g_assert(qdict_haskey(rsp, "return"));
 355     qobject_unref(rsp);
 356     migrate_check_parameter_int(who, parameter, value);
 357 }
 358
 359 static void migrate_pause(QTestState *who)
 360 {
 361     QDict *rsp;
 362
 363     rsp = wait_command(who, "{ 'execute': 'migrate-pause' }");
 364     qobject_unref(rsp);
 365 }
 366
 367 static void migrate_continue(QTestState *who, const char *state)
 368 {
 369     QDict *rsp;
 370
 371     rsp = wait_command(who,
 372                        "{ 'execute': 'migrate-continue',"
 373                        "  'arguments': { 'state': %s } }",
 374                        state);
 375     qobject_unref(rsp);
 376 }
 377
 378 static void migrate_recover(QTestState *who, const char *uri)
 379 {
 380     QDict *rsp;
 381
 382     rsp = wait_command(who,
 383                        "{ 'execute': 'migrate-recover', "
 384                        "  'id': 'recover-cmd', "
 385                        "  'arguments': { 'uri': %s } }",
 386                        uri);
 387     qobject_unref(rsp);
 388 }
 389
 390 static void migrate_set_capability(QTestState *who, const char *capability,
 391                                    bool value)
 392 {
 393     QDict *rsp;
 394
 395     rsp = qtest_qmp(who,
 396                     "{ 'execute': 'migrate-set-capabilities',"
 397                     "'arguments': { "
 398                     "'capabilities': [ { "
 399                     "'capability': %s, 'state': %i } ] } }",
 400                     capability, value);
 401     g_assert(qdict_haskey(rsp, "return"));
 402     qobject_unref(rsp);
 403 }
 404
 405 static void migrate_postcopy_start(QTestState *from, QTestState *to)
 406 {
 407     QDict *rsp;
 408
 409     rsp = wait_command(from, "{ 'execute': 'migrate-start-postcopy' }");
 410     qobject_unref(rsp);
 411
 412     if (!got_stop) {
 413         qtest_qmp_eventwait(from, "STOP");
 414     }
 415
 416     qtest_qmp_eventwait(to, "RESUME");
 417 }
 418
 419 typedef struct {
 420     bool hide_stderr;
 421     bool use_shmem;
 422     char *opts_source;
 423     char *opts_target;
 424 } MigrateStart;
 425
 426 static MigrateStart *migrate_start_new(void)
 427 {
 428     MigrateStart *args = g_new0(MigrateStart, 1);
 429
 430     args->opts_source = g_strdup("");
 431     args->opts_target = g_strdup("");
 432     return args;
 433 }
 434
 435 static void migrate_start_destroy(MigrateStart *args)
 436 {
 437     g_free(args->opts_source);
 438     g_free(args->opts_target);
 439     g_free(args);
 440 }
 441
 442 static int test_migrate_start(QTestState **from, QTestState **to,
 443                               const char *uri, MigrateStart *args)
 444 {
 445     gchar *arch_source, *arch_target;
 446     gchar *cmd_source, *cmd_target;
 447     const gchar *ignore_stderr;
 448     char *bootpath = NULL;
 449     char *shmem_opts;
 450     char *shmem_path;
 451     const char *arch = qtest_get_arch();
 452     const char *machine_opts = NULL;
 453     const char *memory_size;
 454
 455     if (args->use_shmem) {
 456         if (!g_file_test("/dev/shm", G_FILE_TEST_IS_DIR)) {
 457             g_test_skip("/dev/shm is not supported");
 458             return -1;
 459         }
 460     }
 461
 462     got_stop = false;
 463     bootpath = g_strdup_printf("%s/bootsect", tmpfs);
 464     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
 465         /* the assembled x86 boot sector should be exactly one sector large */
 466         assert(sizeof(x86_bootsect) == 512);
 467         init_bootfile(bootpath, x86_bootsect, sizeof(x86_bootsect));
 468         memory_size = "150M";
 469         arch_source = g_strdup_printf("-drive file=%s,format=raw", bootpath);
 470         arch_target = g_strdup(arch_source);
 471         start_address = X86_TEST_MEM_START;
 472         end_address = X86_TEST_MEM_END;
 473     } else if (g_str_equal(arch, "s390x")) {
 474         init_bootfile(bootpath, s390x_elf, sizeof(s390x_elf));
 475         memory_size = "128M";
 476         arch_source = g_strdup_printf("-bios %s", bootpath);
 477         arch_target = g_strdup(arch_source);
 478         start_address = S390_TEST_MEM_START;
 479         end_address = S390_TEST_MEM_END;
 480     } else if (strcmp(arch, "ppc64") == 0) {
 481         machine_opts = "vsmt=8";
 482         memory_size = "256M";
 483         arch_source = g_strdup_printf("-nodefaults "
 484                                       "-prom-env 'use-nvramrc?=true' -prom-env "
 485                                       "'nvramrc=hex .\" _\" begin %x %x "
 486                                       "do i c@ 1 + i c! 1000 +loop .\" B\" 0 "
 487                                       "until'", end_address, start_address);
 488         arch_target = g_strdup("");
 489         start_address = PPC_TEST_MEM_START;
 490         end_address = PPC_TEST_MEM_END;
 491     } else if (strcmp(arch, "aarch64") == 0) {
 492         init_bootfile(bootpath, aarch64_kernel, sizeof(aarch64_kernel));
 493         machine_opts = "virt,gic-version=max";
 494         memory_size = "150M";
 495         arch_source = g_strdup_printf("-cpu max "
 496                                       "-kernel %s",
 497                                       bootpath);
 498         arch_target = g_strdup(arch_source);
 499         start_address = ARM_TEST_MEM_START;
 500         end_address = ARM_TEST_MEM_END;
 501
 502         g_assert(sizeof(aarch64_kernel) <= ARM_TEST_MAX_KERNEL_SIZE);
 503     } else {
 504         g_assert_not_reached();
 505     }
 506
 507     g_free(bootpath);
 508
 509     if (args->hide_stderr) {
 510         ignore_stderr = "2>/dev/null";
 511     } else {
 512         ignore_stderr = "";
 513     }
 514
 515     if (args->use_shmem) {
 516         shmem_path = g_strdup_printf("/dev/shm/qemu-%d", getpid());
 517         shmem_opts = g_strdup_printf(
 518             "-object memory-backend-file,id=mem0,size=%s"
 519             ",mem-path=%s,share=on -numa node,memdev=mem0",
 520             memory_size, shmem_path);
 521     } else {
 522         shmem_path = NULL;
 523         shmem_opts = g_strdup("");
 524     }
 525
 526     cmd_source = g_strdup_printf("-accel kvm -accel tcg%s%s "
 527                                  "-name source,debug-threads=on "
 528                                  "-m %s "
 529                                  "-serial file:%s/src_serial "
 530                                  "%s %s %s %s",
 531                                  machine_opts ? " -machine " : "",
 532                                  machine_opts ? machine_opts : "",
 533                                  memory_size, tmpfs,
 534                                  arch_source, shmem_opts, args->opts_source,
 535                                  ignore_stderr);
 536     g_free(arch_source);
 537     *from = qtest_init(cmd_source);
 538     g_free(cmd_source);
 539
 540     cmd_target = g_strdup_printf("-accel kvm -accel tcg%s%s "
 541                                  "-name target,debug-threads=on "
 542                                  "-m %s "
 543                                  "-serial file:%s/dest_serial "
 544                                  "-incoming %s "
 545                                  "%s %s %s %s",
 546                                  machine_opts ? " -machine " : "",
 547                                  machine_opts ? machine_opts : "",
 548                                  memory_size, tmpfs, uri,
 549                                  arch_target, shmem_opts,
 550                                  args->opts_target, ignore_stderr);
 551     g_free(arch_target);
 552     *to = qtest_init(cmd_target);
 553     g_free(cmd_target);
 554
 555     g_free(shmem_opts);
 556     /*
 557      * Remove shmem file immediately to avoid memory leak in test failed case.
 558      * It's valid becase QEMU has already opened this file
 559      */
 560     if (args->use_shmem) {
 561         unlink(shmem_path);
 562         g_free(shmem_path);
 563     }
 564
 565     migrate_start_destroy(args);
 566     return 0;
 567 }
 568
 569 static void test_migrate_end(QTestState *from, QTestState *to, bool test_dest)
 570 {
 571     unsigned char dest_byte_a, dest_byte_b, dest_byte_c, dest_byte_d;
 572
 573     qtest_quit(from);
 574
 575     if (test_dest) {
 576         qtest_memread(to, start_address, &dest_byte_a, 1);
 577
 578         /* Destination still running, wait for a byte to change */
 579         do {
 580             qtest_memread(to, start_address, &dest_byte_b, 1);
 581             usleep(1000 * 10);
 582         } while (dest_byte_a == dest_byte_b);
 583
 584         qtest_qmp_discard_response(to, "{ 'execute' : 'stop'}");
 585
 586         /* With it stopped, check nothing changes */
 587         qtest_memread(to, start_address, &dest_byte_c, 1);
 588         usleep(1000 * 200);
 589         qtest_memread(to, start_address, &dest_byte_d, 1);
 590         g_assert_cmpint(dest_byte_c, ==, dest_byte_d);
 591
 592         check_guests_ram(to);
 593     }
 594
 595     qtest_quit(to);
 596
 597     cleanup("bootsect");
 598     cleanup("migsocket");
 599     cleanup("src_serial");
 600     cleanup("dest_serial");
 601 }
 602
 603 static void deprecated_set_downtime(QTestState *who, const double value)
 604 {
 605     QDict *rsp;
 606
 607     rsp = qtest_qmp(who,
 608                     "{ 'execute': 'migrate_set_downtime',"
 609                     " 'arguments': { 'value': %f } }", value);
 610     g_assert(qdict_haskey(rsp, "return"));
 611     qobject_unref(rsp);
 612     migrate_check_parameter_int(who, "downtime-limit", value * 1000);
 613 }
 614
 615 static void deprecated_set_speed(QTestState *who, long long value)
 616 {
 617     QDict *rsp;
 618
 619     rsp = qtest_qmp(who, "{ 'execute': 'migrate_set_speed',"
 620                           "'arguments': { 'value': %lld } }", value);
 621     g_assert(qdict_haskey(rsp, "return"));
 622     qobject_unref(rsp);
 623     migrate_check_parameter_int(who, "max-bandwidth", value);
 624 }
 625
 626 static void deprecated_set_cache_size(QTestState *who, long long value)
 627 {
 628     QDict *rsp;
 629
 630     rsp = qtest_qmp(who, "{ 'execute': 'migrate-set-cache-size',"
 631                          "'arguments': { 'value': %lld } }", value);
 632     g_assert(qdict_haskey(rsp, "return"));
 633     qobject_unref(rsp);
 634     migrate_check_parameter_int(who, "xbzrle-cache-size", value);
 635 }
 636
 637 static void test_deprecated(void)
 638 {
 639     QTestState *from;
 640
 641     from = qtest_init("-machine none");
 642
 643     deprecated_set_downtime(from, 0.12345);
 644     deprecated_set_speed(from, 12345);
 645     deprecated_set_cache_size(from, 4096);
 646
 647     qtest_quit(from);
 648 }
 649
 650 static int migrate_postcopy_prepare(QTestState **from_ptr,
 651                                     QTestState **to_ptr,
 652                                     MigrateStart *args)
 653 {
 654     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 655     QTestState *from, *to;
 656
 657     if (test_migrate_start(&from, &to, uri, args)) {
 658         return -1;
 659     }
 660
 661     migrate_set_capability(from, "postcopy-ram", true);
 662     migrate_set_capability(to, "postcopy-ram", true);
 663     migrate_set_capability(to, "postcopy-blocktime", true);
 664
 665     /* We want to pick a speed slow enough that the test completes
 666      * quickly, but that it doesn't complete precopy even on a slow
 667      * machine, so also set the downtime.
 668      */
 669     migrate_set_parameter_int(from, "max-bandwidth", 30000000);
 670     migrate_set_parameter_int(from, "downtime-limit", 1);
 671
 672     /* Wait for the first serial output from the source */
 673     wait_for_serial("src_serial");
 674
 675     migrate_qmp(from, uri, "{}");
 676     g_free(uri);
 677
 678     wait_for_migration_pass(from);
 679
 680     *from_ptr = from;
 681     *to_ptr = to;
 682
 683     return 0;
 684 }
 685
 686 static void migrate_postcopy_complete(QTestState *from, QTestState *to)
 687 {
 688     wait_for_migration_complete(from);
 689
 690     /* Make sure we get at least one "B" on destination */
 691     wait_for_serial("dest_serial");
 692
 693     if (uffd_feature_thread_id) {
 694         read_blocktime(to);
 695     }
 696
 697     test_migrate_end(from, to, true);
 698 }
 699
 700 static void test_postcopy(void)
 701 {
 702     MigrateStart *args = migrate_start_new();
 703     QTestState *from, *to;
 704
 705     if (migrate_postcopy_prepare(&from, &to, args)) {
 706         return;
 707     }
 708     migrate_postcopy_start(from, to);
 709     migrate_postcopy_complete(from, to);
 710 }
 711
 712 static void test_postcopy_recovery(void)
 713 {
 714     MigrateStart *args = migrate_start_new();
 715     QTestState *from, *to;
 716     char *uri;
 717
 718     args->hide_stderr = true;
 719
 720     if (migrate_postcopy_prepare(&from, &to, args)) {
 721         return;
 722     }
 723
 724     /* Turn postcopy speed down, 4K/s is slow enough on any machines */
 725     migrate_set_parameter_int(from, "max-postcopy-bandwidth", 4096);
 726
 727     /* Now we start the postcopy */
 728     migrate_postcopy_start(from, to);
 729
 730     /*
 731      * Wait until postcopy is really started; we can only run the
 732      * migrate-pause command during a postcopy
 733      */
 734     wait_for_migration_status(from, "postcopy-active", NULL);
 735
 736     /*
 737      * Manually stop the postcopy migration. This emulates a network
 738      * failure with the migration socket
 739      */
 740     migrate_pause(from);
 741
 742     /*
 743      * Wait for destination side to reach postcopy-paused state.  The
 744      * migrate-recover command can only succeed if destination machine
 745      * is in the paused state
 746      */
 747     wait_for_migration_status(to, "postcopy-paused",
 748                               (const char * []) { "failed", "active",
 749                                                   "completed", NULL });
 750
 751     /*
 752      * Create a new socket to emulate a new channel that is different
 753      * from the broken migration channel; tell the destination to
 754      * listen to the new port
 755      */
 756     uri = g_strdup_printf("unix:%s/migsocket-recover", tmpfs);
 757     migrate_recover(to, uri);
 758
 759     /*
 760      * Try to rebuild the migration channel using the resume flag and
 761      * the newly created channel
 762      */
 763     wait_for_migration_status(from, "postcopy-paused",
 764                               (const char * []) { "failed", "active",
 765                                                   "completed", NULL });
 766     migrate_qmp(from, uri, "{'resume': true}");
 767     g_free(uri);
 768
 769     /* Restore the postcopy bandwidth to unlimited */
 770     migrate_set_parameter_int(from, "max-postcopy-bandwidth", 0);
 771
 772     migrate_postcopy_complete(from, to);
 773 }
 774
 775 static void test_baddest(void)
 776 {
 777     MigrateStart *args = migrate_start_new();
 778     QTestState *from, *to;
 779
 780     args->hide_stderr = true;
 781
 782     if (test_migrate_start(&from, &to, "tcp:0:0", args)) {
 783         return;
 784     }
 785     migrate_qmp(from, "tcp:0:0", "{}");
 786     wait_for_migration_fail(from, false);
 787     test_migrate_end(from, to, false);
 788 }
 789
 790 static void test_precopy_unix(void)
 791 {
 792     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 793     MigrateStart *args = migrate_start_new();
 794     QTestState *from, *to;
 795
 796     if (test_migrate_start(&from, &to, uri, args)) {
 797         return;
 798     }
 799
 800     /* We want to pick a speed slow enough that the test completes
 801      * quickly, but that it doesn't complete precopy even on a slow
 802      * machine, so also set the downtime.
 803      */
 804     /* 1 ms should make it not converge*/
 805     migrate_set_parameter_int(from, "downtime-limit", 1);
 806     /* 1GB/s */
 807     migrate_set_parameter_int(from, "max-bandwidth", 1000000000);
 808
 809     /* Wait for the first serial output from the source */
 810     wait_for_serial("src_serial");
 811
 812     migrate_qmp(from, uri, "{}");
 813
 814     wait_for_migration_pass(from);
 815
 816     /* 300 ms should converge */
 817     migrate_set_parameter_int(from, "downtime-limit", 300);
 818
 819     if (!got_stop) {
 820         qtest_qmp_eventwait(from, "STOP");
 821     }
 822
 823     qtest_qmp_eventwait(to, "RESUME");
 824
 825     wait_for_serial("dest_serial");
 826     wait_for_migration_complete(from);
 827
 828     test_migrate_end(from, to, true);
 829     g_free(uri);
 830 }
 831
 832 #if 0
 833 /* Currently upset on aarch64 TCG */
 834 static void test_ignore_shared(void)
 835 {
 836     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 837     QTestState *from, *to;
 838
 839     if (test_migrate_start(&from, &to, uri, false, true, NULL, NULL)) {
 840         return;
 841     }
 842
 843     migrate_set_capability(from, "x-ignore-shared", true);
 844     migrate_set_capability(to, "x-ignore-shared", true);
 845
 846     /* Wait for the first serial output from the source */
 847     wait_for_serial("src_serial");
 848
 849     migrate_qmp(from, uri, "{}");
 850
 851     wait_for_migration_pass(from);
 852
 853     if (!got_stop) {
 854         qtest_qmp_eventwait(from, "STOP");
 855     }
 856
 857     qtest_qmp_eventwait(to, "RESUME");
 858
 859     wait_for_serial("dest_serial");
 860     wait_for_migration_complete(from);
 861
 862     /* Check whether shared RAM has been really skipped */
 863     g_assert_cmpint(read_ram_property_int(from, "transferred"), <, 1024 * 1024);
 864
 865     test_migrate_end(from, to, true);
 866     g_free(uri);
 867 }
 868 #endif
 869
 870 static void test_xbzrle(const char *uri)
 871 {
 872     MigrateStart *args = migrate_start_new();
 873     QTestState *from, *to;
 874
 875     if (test_migrate_start(&from, &to, uri, args)) {
 876         return;
 877     }
 878
 879     /*
 880      * We want to pick a speed slow enough that the test completes
 881      * quickly, but that it doesn't complete precopy even on a slow
 882      * machine, so also set the downtime.
 883      */
 884     /* 1 ms should make it not converge*/
 885     migrate_set_parameter_int(from, "downtime-limit", 1);
 886     /* 1GB/s */
 887     migrate_set_parameter_int(from, "max-bandwidth", 1000000000);
 888
 889     migrate_set_parameter_int(from, "xbzrle-cache-size", 33554432);
 890
 891     migrate_set_capability(from, "xbzrle", "true");
 892     migrate_set_capability(to, "xbzrle", "true");
 893     /* Wait for the first serial output from the source */
 894     wait_for_serial("src_serial");
 895
 896     migrate_qmp(from, uri, "{}");
 897
 898     wait_for_migration_pass(from);
 899
 900     /* 300ms should converge */
 901     migrate_set_parameter_int(from, "downtime-limit", 300);
 902
 903     if (!got_stop) {
 904         qtest_qmp_eventwait(from, "STOP");
 905     }
 906     qtest_qmp_eventwait(to, "RESUME");
 907
 908     wait_for_serial("dest_serial");
 909     wait_for_migration_complete(from);
 910
 911     test_migrate_end(from, to, true);
 912 }
 913
 914 static void test_xbzrle_unix(void)
 915 {
 916     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 917
 918     test_xbzrle(uri);
 919     g_free(uri);
 920 }
 921
 922 static void test_precopy_tcp(void)
 923 {
 924     MigrateStart *args = migrate_start_new();
 925     char *uri;
 926     QTestState *from, *to;
 927
 928     if (test_migrate_start(&from, &to, "tcp:127.0.0.1:0", args)) {
 929         return;
 930     }
 931
 932     /*
 933      * We want to pick a speed slow enough that the test completes
 934      * quickly, but that it doesn't complete precopy even on a slow
 935      * machine, so also set the downtime.
 936      */
 937     /* 1 ms should make it not converge*/
 938     migrate_set_parameter_int(from, "downtime-limit", 1);
 939     /* 1GB/s */
 940     migrate_set_parameter_int(from, "max-bandwidth", 1000000000);
 941
 942     /* Wait for the first serial output from the source */
 943     wait_for_serial("src_serial");
 944
 945     uri = migrate_get_socket_address(to, "socket-address");
 946
 947     migrate_qmp(from, uri, "{}");
 948
 949     wait_for_migration_pass(from);
 950
 951     /* 300ms should converge */
 952     migrate_set_parameter_int(from, "downtime-limit", 300);
 953
 954     if (!got_stop) {
 955         qtest_qmp_eventwait(from, "STOP");
 956     }
 957     qtest_qmp_eventwait(to, "RESUME");
 958
 959     wait_for_serial("dest_serial");
 960     wait_for_migration_complete(from);
 961
 962     test_migrate_end(from, to, true);
 963     g_free(uri);
 964 }
 965
 966 static void test_migrate_fd_proto(void)
 967 {
 968     MigrateStart *args = migrate_start_new();
 969     QTestState *from, *to;
 970     int ret;
 971     int pair[2];
 972     QDict *rsp;
 973     const char *error_desc;
 974
 975     if (test_migrate_start(&from, &to, "defer", args)) {
 976         return;
 977     }
 978
 979     /*
 980      * We want to pick a speed slow enough that the test completes
 981      * quickly, but that it doesn't complete precopy even on a slow
 982      * machine, so also set the downtime.
 983      */
 984     /* 1 ms should make it not converge */
 985     migrate_set_parameter_int(from, "downtime-limit", 1);
 986     /* 1GB/s */
 987     migrate_set_parameter_int(from, "max-bandwidth", 1000000000);
 988
 989     /* Wait for the first serial output from the source */
 990     wait_for_serial("src_serial");
 991
 992     /* Create two connected sockets for migration */
 993     ret = socketpair(PF_LOCAL, SOCK_STREAM, 0, pair);
 994     g_assert_cmpint(ret, ==, 0);
 995
 996     /* Send the 1st socket to the target */
 997     rsp = wait_command_fd(to, pair[0],
 998                           "{ 'execute': 'getfd',"
 999                           "  'arguments': { 'fdname': 'fd-mig' }}");
1000     qobject_unref(rsp);
1001     close(pair[0]);
1002
1003     /* Start incoming migration from the 1st socket */
1004     rsp = wait_command(to, "{ 'execute': 'migrate-incoming',"
1005                            "  'arguments': { 'uri': 'fd:fd-mig' }}");
1006     qobject_unref(rsp);
1007
1008     /* Send the 2nd socket to the target */
1009     rsp = wait_command_fd(from, pair[1],
1010                           "{ 'execute': 'getfd',"
1011                           "  'arguments': { 'fdname': 'fd-mig' }}");
1012     qobject_unref(rsp);
1013     close(pair[1]);
1014
1015     /* Start migration to the 2nd socket*/
1016     migrate_qmp(from, "fd:fd-mig", "{}");
1017
1018     wait_for_migration_pass(from);
1019
1020     /* 300ms should converge */
1021     migrate_set_parameter_int(from, "downtime-limit", 300);
1022
1023     if (!got_stop) {
1024         qtest_qmp_eventwait(from, "STOP");
1025     }
1026     qtest_qmp_eventwait(to, "RESUME");
1027
1028     /* Test closing fds */
1029     /* We assume, that QEMU removes named fd from its list,
1030      * so this should fail */
1031     rsp = qtest_qmp(from, "{ 'execute': 'closefd',"
1032                           "  'arguments': { 'fdname': 'fd-mig' }}");
1033     g_assert_true(qdict_haskey(rsp, "error"));
1034     error_desc = qdict_get_str(qdict_get_qdict(rsp, "error"), "desc");
1035     g_assert_cmpstr(error_desc, ==, "File descriptor named 'fd-mig' not found");
1036     qobject_unref(rsp);
1037
1038     rsp = qtest_qmp(to, "{ 'execute': 'closefd',"
1039                         "  'arguments': { 'fdname': 'fd-mig' }}");
1040     g_assert_true(qdict_haskey(rsp, "error"));
1041     error_desc = qdict_get_str(qdict_get_qdict(rsp, "error"), "desc");
1042     g_assert_cmpstr(error_desc, ==, "File descriptor named 'fd-mig' not found");
1043     qobject_unref(rsp);
1044
1045     /* Complete migration */
1046     wait_for_serial("dest_serial");
1047     wait_for_migration_complete(from);
1048     test_migrate_end(from, to, true);
1049 }
1050
1051 static void do_test_validate_uuid(MigrateStart *args, bool should_fail)
1052 {
1053     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
1054     QTestState *from, *to;
1055
1056     if (test_migrate_start(&from, &to, uri, args)) {
1057         return;
1058     }
1059
1060     /*
1061      * UUID validation is at the begin of migration. So, the main process of
1062      * migration is not interesting for us here. Thus, set huge downtime for
1063      * very fast migration.
1064      */
1065     migrate_set_parameter_int(from, "downtime-limit", 1000000);
1066     migrate_set_capability(from, "validate-uuid", true);
1067
1068     /* Wait for the first serial output from the source */
1069     wait_for_serial("src_serial");
1070
1071     migrate_qmp(from, uri, "{}");
1072
1073     if (should_fail) {
1074         qtest_set_expected_status(to, 1);
1075         wait_for_migration_fail(from, true);
1076     } else {
1077         wait_for_migration_complete(from);
1078     }
1079
1080     test_migrate_end(from, to, false);
1081     g_free(uri);
1082 }
1083
1084 static void test_validate_uuid(void)
1085 {
1086     MigrateStart *args = migrate_start_new();
1087
1088     args->opts_source = g_strdup("-uuid 11111111-1111-1111-1111-111111111111");
1089     args->opts_target = g_strdup("-uuid 11111111-1111-1111-1111-111111111111");
1090     do_test_validate_uuid(args, false);
1091 }
1092
1093 static void test_validate_uuid_error(void)
1094 {
1095     MigrateStart *args = migrate_start_new();
1096
1097     args->opts_source = g_strdup("-uuid 11111111-1111-1111-1111-111111111111");
1098     args->opts_target = g_strdup("-uuid 22222222-2222-2222-2222-222222222222");
1099     args->hide_stderr = true;
1100     do_test_validate_uuid(args, true);
1101 }
1102
1103 static void test_validate_uuid_src_not_set(void)
1104 {
1105     MigrateStart *args = migrate_start_new();
1106
1107     args->opts_target = g_strdup("-uuid 22222222-2222-2222-2222-222222222222");
1108     args->hide_stderr = true;
1109     do_test_validate_uuid(args, false);
1110 }
1111
1112 static void test_validate_uuid_dst_not_set(void)
1113 {
1114     MigrateStart *args = migrate_start_new();
1115
1116     args->opts_source = g_strdup("-uuid 11111111-1111-1111-1111-111111111111");
1117     args->hide_stderr = true;
1118     do_test_validate_uuid(args, false);
1119 }
1120
1121 static void test_migrate_auto_converge(void)
1122 {
1123     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
1124     MigrateStart *args = migrate_start_new();
1125     QTestState *from, *to;
1126     int64_t remaining, percentage;
1127
1128     /*
1129      * We want the test to be stable and as fast as possible.
1130      * E.g., with 1Gb/s bandwith migration may pass without throttling,
1131      * so we need to decrease a bandwidth.
1132      */
1133     const int64_t init_pct = 5, inc_pct = 50, max_pct = 95;
1134     const int64_t max_bandwidth = 400000000; /* ~400Mb/s */
1135     const int64_t downtime_limit = 250; /* 250ms */
1136     /*
1137      * We migrate through unix-socket (> 500Mb/s).
1138      * Thus, expected migration speed ~= bandwidth limit (< 500Mb/s).
1139      * So, we can predict expected_threshold
1140      */
1141     const int64_t expected_threshold = max_bandwidth * downtime_limit / 1000;
1142
1143     if (test_migrate_start(&from, &to, uri, args)) {
1144         return;
1145     }
1146
1147     migrate_set_capability(from, "auto-converge", true);
1148     migrate_set_parameter_int(from, "cpu-throttle-initial", init_pct);
1149     migrate_set_parameter_int(from, "cpu-throttle-increment", inc_pct);
1150     migrate_set_parameter_int(from, "max-cpu-throttle", max_pct);
1151
1152     /*
1153      * Set the initial parameters so that the migration could not converge
1154      * without throttling.
1155      */
1156     migrate_set_parameter_int(from, "downtime-limit", 1);
1157     migrate_set_parameter_int(from, "max-bandwidth", 100000000); /* ~100Mb/s */
1158
1159     /* To check remaining size after precopy */
1160     migrate_set_capability(from, "pause-before-switchover", true);
1161
1162     /* Wait for the first serial output from the source */
1163     wait_for_serial("src_serial");
1164
1165     migrate_qmp(from, uri, "{}");
1166
1167     /* Wait for throttling begins */
1168     percentage = 0;
1169     while (percentage == 0) {
1170         percentage = read_migrate_property_int(from, "cpu-throttle-percentage");
1171         usleep(100);
1172         g_assert_false(got_stop);
1173     }
1174     /* The first percentage of throttling should be equal to init_pct */
1175     g_assert_cmpint(percentage, ==, init_pct);
1176     /* Now, when we tested that throttling works, let it converge */
1177     migrate_set_parameter_int(from, "downtime-limit", downtime_limit);
1178     migrate_set_parameter_int(from, "max-bandwidth", max_bandwidth);
1179
1180     /*
1181      * Wait for pre-switchover status to check last throttle percentage
1182      * and remaining. These values will be zeroed later
1183      */
1184     wait_for_migration_status(from, "pre-switchover", NULL);
1185
1186     /* The final percentage of throttling shouldn't be greater than max_pct */
1187     percentage = read_migrate_property_int(from, "cpu-throttle-percentage");
1188     g_assert_cmpint(percentage, <=, max_pct);
1189
1190     remaining = read_ram_property_int(from, "remaining");
1191     g_assert_cmpint(remaining, <, expected_threshold);
1192
1193     migrate_continue(from, "pre-switchover");
1194
1195     qtest_qmp_eventwait(to, "RESUME");
1196
1197     wait_for_serial("dest_serial");
1198     wait_for_migration_complete(from);
1199
1200     g_free(uri);
1201
1202     test_migrate_end(from, to, true);
1203 }
1204
1205 int main(int argc, char **argv)
1206 {
1207     char template[] = "/tmp/migration-test-XXXXXX";
1208     int ret;
1209
1210     g_test_init(&argc, &argv, NULL);
1211
1212     if (!ufd_version_check()) {
1213         return g_test_run();
1214     }
1215
1216     /*
1217      * On ppc64, the test only works with kvm-hv, but not with kvm-pr and TCG
1218      * is touchy due to race conditions on dirty bits (especially on PPC for
1219      * some reason)
1220      */
1221     if (g_str_equal(qtest_get_arch(), "ppc64") &&
1222         (access("/sys/module/kvm_hv", F_OK) ||
1223          access("/dev/kvm", R_OK | W_OK))) {
1224         g_test_message("Skipping test: kvm_hv not available");
1225         return g_test_run();
1226     }
1227
1228     /*
1229      * Similar to ppc64, s390x seems to be touchy with TCG, so disable it
1230      * there until the problems are resolved
1231      */
1232     if (g_str_equal(qtest_get_arch(), "s390x")) {
1233 #if defined(HOST_S390X)
1234         if (access("/dev/kvm", R_OK | W_OK)) {
1235             g_test_message("Skipping test: kvm not available");
1236             return g_test_run();
1237         }
1238 #else
1239         g_test_message("Skipping test: Need s390x host to work properly");
1240         return g_test_run();
1241 #endif
1242     }
1243
1244     tmpfs = mkdtemp(template);
1245     if (!tmpfs) {
1246         g_test_message("mkdtemp on path (%s): %s", template, strerror(errno));
1247     }
1248     g_assert(tmpfs);
1249
1250     module_call_init(MODULE_INIT_QOM);
1251
1252     qtest_add_func("/migration/postcopy/unix", test_postcopy);
1253     qtest_add_func("/migration/postcopy/recovery", test_postcopy_recovery);
1254     qtest_add_func("/migration/deprecated", test_deprecated);
1255     qtest_add_func("/migration/bad_dest", test_baddest);
1256     qtest_add_func("/migration/precopy/unix", test_precopy_unix);
1257     qtest_add_func("/migration/precopy/tcp", test_precopy_tcp);
1258     /* qtest_add_func("/migration/ignore_shared", test_ignore_shared); */
1259     qtest_add_func("/migration/xbzrle/unix", test_xbzrle_unix);
1260     qtest_add_func("/migration/fd_proto", test_migrate_fd_proto);
1261     qtest_add_func("/migration/validate_uuid", test_validate_uuid);
1262     qtest_add_func("/migration/validate_uuid_error", test_validate_uuid_error);
1263     qtest_add_func("/migration/validate_uuid_src_not_set",
1264                    test_validate_uuid_src_not_set);
1265     qtest_add_func("/migration/validate_uuid_dst_not_set",
1266                    test_validate_uuid_dst_not_set);
1267
1268     qtest_add_func("/migration/auto_converge", test_migrate_auto_converge);
1269
1270     ret = g_test_run();
1271
1272     g_assert_cmpint(ret, ==, 0);
1273
1274     ret = rmdir(tmpfs);
1275     if (ret != 0) {
1276         g_test_message("unable to rmdir: path (%s): %s",
1277                        tmpfs, strerror(errno));
1278     }
1279
1280     return ret;
1281 }