tests/migration-test.c

   1 /*
   2  * QTest testcase for migration
   3  *
   4  * Copyright (c) 2016-2018 Red Hat, Inc. and/or its affiliates
   5  *   based on the vhost-user-test.c that is:
   6  *      Copyright (c) 2014 Virtual Open Systems Sarl.
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   9  * See the COPYING file in the top-level directory.
  10  *
  11  */
  12
  13 #include "qemu/osdep.h"
  14
  15 #include "libqtest.h"
  16 #include "qapi/qmp/qdict.h"
  17 #include "qapi/qmp/qjson.h"
  18 #include "qemu/option.h"
  19 #include "qemu/range.h"
  20 #include "qemu/sockets.h"
  21 #include "chardev/char.h"
  22 #include "sysemu/sysemu.h"
  23 #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
  94 static void init_bootfile(const char *bootpath, void *content)
  95 {
  96     FILE *bootfile = fopen(bootpath, "wb");
  97
  98     g_assert_cmpint(fwrite(content, 512, 1, bootfile), ==, 1);
  99     fclose(bootfile);
 100 }
 101
 102 #include "tests/migration/s390x/a-b-bios.h"
 103
 104 static void init_bootfile_s390x(const char *bootpath)
 105 {
 106     FILE *bootfile = fopen(bootpath, "wb");
 107     size_t len = sizeof(s390x_elf);
 108
 109     g_assert_cmpint(fwrite(s390x_elf, len, 1, bootfile), ==, 1);
 110     fclose(bootfile);
 111 }
 112
 113 /*
 114  * Wait for some output in the serial output file,
 115  * we get an 'A' followed by an endless string of 'B's
 116  * but on the destination we won't have the A.
 117  */
 118 static void wait_for_serial(const char *side)
 119 {
 120     char *serialpath = g_strdup_printf("%s/%s", tmpfs, side);
 121     FILE *serialfile = fopen(serialpath, "r");
 122     const char *arch = qtest_get_arch();
 123     int started = (strcmp(side, "src_serial") == 0 &&
 124                    strcmp(arch, "ppc64") == 0) ? 0 : 1;
 125
 126     g_free(serialpath);
 127     do {
 128         int readvalue = fgetc(serialfile);
 129
 130         if (!started) {
 131             /* SLOF prints its banner before starting test,
 132              * to ignore it, mark the start of the test with '_',
 133              * ignore all characters until this marker
 134              */
 135             switch (readvalue) {
 136             case '_':
 137                 started = 1;
 138                 break;
 139             case EOF:
 140                 fseek(serialfile, 0, SEEK_SET);
 141                 usleep(1000);
 142                 break;
 143             }
 144             continue;
 145         }
 146         switch (readvalue) {
 147         case 'A':
 148             /* Fine */
 149             break;
 150
 151         case 'B':
 152             /* It's alive! */
 153             fclose(serialfile);
 154             return;
 155
 156         case EOF:
 157             started = (strcmp(side, "src_serial") == 0 &&
 158                        strcmp(arch, "ppc64") == 0) ? 0 : 1;
 159             fseek(serialfile, 0, SEEK_SET);
 160             usleep(1000);
 161             break;
 162
 163         default:
 164             fprintf(stderr, "Unexpected %d on %s serial\n", readvalue, side);
 165             g_assert_not_reached();
 166         }
 167     } while (true);
 168 }
 169
 170 static void stop_cb(void *opaque, const char *name, QDict *data)
 171 {
 172     if (!strcmp(name, "STOP")) {
 173         got_stop = true;
 174     }
 175 }
 176
 177 /*
 178  * Events can get in the way of responses we are actually waiting for.
 179  */
 180 GCC_FMT_ATTR(2, 3)
 181 static QDict *wait_command(QTestState *who, const char *command, ...)
 182 {
 183     va_list ap;
 184
 185     va_start(ap, command);
 186     qtest_qmp_vsend(who, command, ap);
 187     va_end(ap);
 188
 189     return qtest_qmp_receive_success(who, stop_cb, NULL);
 190 }
 191
 192 /*
 193  * Note: caller is responsible to free the returned object via
 194  * qobject_unref() after use
 195  */
 196 static QDict *migrate_query(QTestState *who)
 197 {
 198     return wait_command(who, "{ 'execute': 'query-migrate' }");
 199 }
 200
 201 /*
 202  * Note: caller is responsible to free the returned object via
 203  * g_free() after use
 204  */
 205 static gchar *migrate_query_status(QTestState *who)
 206 {
 207     QDict *rsp_return = migrate_query(who);
 208     gchar *status = g_strdup(qdict_get_str(rsp_return, "status"));
 209
 210     g_assert(status);
 211     qobject_unref(rsp_return);
 212
 213     return status;
 214 }
 215
 216 /*
 217  * It's tricky to use qemu's migration event capability with qtest,
 218  * events suddenly appearing confuse the qmp()/hmp() responses.
 219  */
 220
 221 static int64_t read_ram_property_int(QTestState *who, const char *property)
 222 {
 223     QDict *rsp_return, *rsp_ram;
 224     int64_t result;
 225
 226     rsp_return = migrate_query(who);
 227     if (!qdict_haskey(rsp_return, "ram")) {
 228         /* Still in setup */
 229         result = 0;
 230     } else {
 231         rsp_ram = qdict_get_qdict(rsp_return, "ram");
 232         result = qdict_get_try_int(rsp_ram, property, 0);
 233     }
 234     qobject_unref(rsp_return);
 235     return result;
 236 }
 237
 238 static uint64_t get_migration_pass(QTestState *who)
 239 {
 240     return read_ram_property_int(who, "dirty-sync-count");
 241 }
 242
 243 static void read_blocktime(QTestState *who)
 244 {
 245     QDict *rsp_return;
 246
 247     rsp_return = migrate_query(who);
 248     g_assert(qdict_haskey(rsp_return, "postcopy-blocktime"));
 249     qobject_unref(rsp_return);
 250 }
 251
 252 static void wait_for_migration_status(QTestState *who,
 253                                       const char *goal)
 254 {
 255     while (true) {
 256         bool completed;
 257         char *status;
 258
 259         status = migrate_query_status(who);
 260         completed = strcmp(status, goal) == 0;
 261         g_assert_cmpstr(status, !=,  "failed");
 262         g_free(status);
 263         if (completed) {
 264             return;
 265         }
 266         usleep(1000);
 267     }
 268 }
 269
 270 static void wait_for_migration_complete(QTestState *who)
 271 {
 272     wait_for_migration_status(who, "completed");
 273 }
 274
 275 static void wait_for_migration_pass(QTestState *who)
 276 {
 277     uint64_t initial_pass = get_migration_pass(who);
 278     uint64_t pass;
 279
 280     /* Wait for the 1st sync */
 281     while (!got_stop && !initial_pass) {
 282         usleep(1000);
 283         initial_pass = get_migration_pass(who);
 284     }
 285
 286     do {
 287         usleep(1000);
 288         pass = get_migration_pass(who);
 289     } while (pass == initial_pass && !got_stop);
 290 }
 291
 292 static void check_guests_ram(QTestState *who)
 293 {
 294     /* Our ASM test will have been incrementing one byte from each page from
 295      * start_address to < end_address in order. This gives us a constraint
 296      * that any page's byte should be equal or less than the previous pages
 297      * byte (mod 256); and they should all be equal except for one transition
 298      * at the point where we meet the incrementer. (We're running this with
 299      * the guest stopped).
 300      */
 301     unsigned address;
 302     uint8_t first_byte;
 303     uint8_t last_byte;
 304     bool hit_edge = false;
 305     bool bad = false;
 306
 307     qtest_memread(who, start_address, &first_byte, 1);
 308     last_byte = first_byte;
 309
 310     for (address = start_address + TEST_MEM_PAGE_SIZE; address < end_address;
 311          address += TEST_MEM_PAGE_SIZE)
 312     {
 313         uint8_t b;
 314         qtest_memread(who, address, &b, 1);
 315         if (b != last_byte) {
 316             if (((b + 1) % 256) == last_byte && !hit_edge) {
 317                 /* This is OK, the guest stopped at the point of
 318                  * incrementing the previous page but didn't get
 319                  * to us yet.
 320                  */
 321                 hit_edge = true;
 322                 last_byte = b;
 323             } else {
 324                 fprintf(stderr, "Memory content inconsistency at %x"
 325                                 " first_byte = %x last_byte = %x current = %x"
 326                                 " hit_edge = %x\n",
 327                                 address, first_byte, last_byte, b, hit_edge);
 328                 bad = true;
 329             }
 330         }
 331     }
 332     g_assert_false(bad);
 333 }
 334
 335 static void cleanup(const char *filename)
 336 {
 337     char *path = g_strdup_printf("%s/%s", tmpfs, filename);
 338
 339     unlink(path);
 340     g_free(path);
 341 }
 342
 343 static char *get_shmem_opts(const char *mem_size, const char *shmem_path)
 344 {
 345     return g_strdup_printf("-object memory-backend-file,id=mem0,size=%s"
 346                            ",mem-path=%s,share=on -numa node,memdev=mem0",
 347                            mem_size, shmem_path);
 348 }
 349
 350 static char *SocketAddress_to_str(SocketAddress *addr)
 351 {
 352     switch (addr->type) {
 353     case SOCKET_ADDRESS_TYPE_INET:
 354         return g_strdup_printf("tcp:%s:%s",
 355                                addr->u.inet.host,
 356                                addr->u.inet.port);
 357     case SOCKET_ADDRESS_TYPE_UNIX:
 358         return g_strdup_printf("unix:%s",
 359                                addr->u.q_unix.path);
 360     case SOCKET_ADDRESS_TYPE_FD:
 361         return g_strdup_printf("fd:%s", addr->u.fd.str);
 362     case SOCKET_ADDRESS_TYPE_VSOCK:
 363         return g_strdup_printf("tcp:%s:%s",
 364                                addr->u.vsock.cid,
 365                                addr->u.vsock.port);
 366     default:
 367         return g_strdup("unknown address type");
 368     }
 369 }
 370
 371 static char *migrate_get_socket_address(QTestState *who, const char *parameter)
 372 {
 373     QDict *rsp;
 374     char *result;
 375     Error *local_err = NULL;
 376     SocketAddressList *addrs;
 377     Visitor *iv = NULL;
 378     QObject *object;
 379
 380     rsp = migrate_query(who);
 381     object = qdict_get(rsp, parameter);
 382
 383     iv = qobject_input_visitor_new(object);
 384     visit_type_SocketAddressList(iv, NULL, &addrs, &local_err);
 385     visit_free(iv);
 386
 387     /* we are only using a single address */
 388     result = SocketAddress_to_str(addrs->value);
 389
 390     qapi_free_SocketAddressList(addrs);
 391     qobject_unref(rsp);
 392     return result;
 393 }
 394
 395 static long long migrate_get_parameter(QTestState *who, const char *parameter)
 396 {
 397     QDict *rsp;
 398     long long result;
 399
 400     rsp = wait_command(who, "{ 'execute': 'query-migrate-parameters' }");
 401     result = qdict_get_int(rsp, parameter);
 402     qobject_unref(rsp);
 403     return result;
 404 }
 405
 406 static void migrate_check_parameter(QTestState *who, const char *parameter,
 407                                     long long value)
 408 {
 409     long long result;
 410
 411     result = migrate_get_parameter(who, parameter);
 412     g_assert_cmpint(result, ==, value);
 413 }
 414
 415 static void migrate_set_parameter(QTestState *who, const char *parameter,
 416                                   long long value)
 417 {
 418     QDict *rsp;
 419
 420     rsp = qtest_qmp(who,
 421                     "{ 'execute': 'migrate-set-parameters',"
 422                     "'arguments': { %s: %lld } }",
 423                     parameter, value);
 424     g_assert(qdict_haskey(rsp, "return"));
 425     qobject_unref(rsp);
 426     migrate_check_parameter(who, parameter, value);
 427 }
 428
 429 static void migrate_pause(QTestState *who)
 430 {
 431     QDict *rsp;
 432
 433     rsp = wait_command(who, "{ 'execute': 'migrate-pause' }");
 434     qobject_unref(rsp);
 435 }
 436
 437 static void migrate_recover(QTestState *who, const char *uri)
 438 {
 439     QDict *rsp;
 440
 441     rsp = wait_command(who,
 442                        "{ 'execute': 'migrate-recover', "
 443                        "  'id': 'recover-cmd', "
 444                        "  'arguments': { 'uri': %s } }",
 445                        uri);
 446     qobject_unref(rsp);
 447 }
 448
 449 static void migrate_set_capability(QTestState *who, const char *capability,
 450                                    bool value)
 451 {
 452     QDict *rsp;
 453
 454     rsp = qtest_qmp(who,
 455                     "{ 'execute': 'migrate-set-capabilities',"
 456                     "'arguments': { "
 457                     "'capabilities': [ { "
 458                     "'capability': %s, 'state': %i } ] } }",
 459                     capability, value);
 460     g_assert(qdict_haskey(rsp, "return"));
 461     qobject_unref(rsp);
 462 }
 463
 464 /*
 465  * Send QMP command "migrate".
 466  * Arguments are built from @fmt... (formatted like
 467  * qobject_from_jsonf_nofail()) with "uri": @uri spliced in.
 468  */
 469 GCC_FMT_ATTR(3, 4)
 470 static void migrate(QTestState *who, const char *uri, const char *fmt, ...)
 471 {
 472     va_list ap;
 473     QDict *args, *rsp;
 474
 475     va_start(ap, fmt);
 476     args = qdict_from_vjsonf_nofail(fmt, ap);
 477     va_end(ap);
 478
 479     g_assert(!qdict_haskey(args, "uri"));
 480     qdict_put_str(args, "uri", uri);
 481
 482     rsp = qmp("{ 'execute': 'migrate', 'arguments': %p}", args);
 483     g_assert(qdict_haskey(rsp, "return"));
 484     qobject_unref(rsp);
 485 }
 486
 487 static void migrate_postcopy_start(QTestState *from, QTestState *to)
 488 {
 489     QDict *rsp;
 490
 491     rsp = wait_command(from, "{ 'execute': 'migrate-start-postcopy' }");
 492     qobject_unref(rsp);
 493
 494     if (!got_stop) {
 495         qtest_qmp_eventwait(from, "STOP");
 496     }
 497
 498     qtest_qmp_eventwait(to, "RESUME");
 499 }
 500
 501 static int test_migrate_start(QTestState **from, QTestState **to,
 502                                const char *uri, bool hide_stderr,
 503                                bool use_shmem)
 504 {
 505     gchar *cmd_src, *cmd_dst;
 506     char *bootpath = NULL;
 507     char *extra_opts = NULL;
 508     char *shmem_path = NULL;
 509     const char *arch = qtest_get_arch();
 510     const char *accel = "kvm:tcg";
 511
 512     if (use_shmem) {
 513         if (!g_file_test("/dev/shm", G_FILE_TEST_IS_DIR)) {
 514             g_test_skip("/dev/shm is not supported");
 515             return -1;
 516         }
 517         shmem_path = g_strdup_printf("/dev/shm/qemu-%d", getpid());
 518     }
 519
 520     got_stop = false;
 521     bootpath = g_strdup_printf("%s/bootsect", tmpfs);
 522     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
 523         init_bootfile(bootpath, x86_bootsect);
 524         extra_opts = use_shmem ? get_shmem_opts("150M", shmem_path) : NULL;
 525         cmd_src = g_strdup_printf("-machine accel=%s -m 150M"
 526                                   " -name source,debug-threads=on"
 527                                   " -serial file:%s/src_serial"
 528                                   " -drive file=%s,format=raw %s",
 529                                   accel, tmpfs, bootpath,
 530                                   extra_opts ? extra_opts : "");
 531         cmd_dst = g_strdup_printf("-machine accel=%s -m 150M"
 532                                   " -name target,debug-threads=on"
 533                                   " -serial file:%s/dest_serial"
 534                                   " -drive file=%s,format=raw"
 535                                   " -incoming %s %s",
 536                                   accel, tmpfs, bootpath, uri,
 537                                   extra_opts ? extra_opts : "");
 538         start_address = X86_TEST_MEM_START;
 539         end_address = X86_TEST_MEM_END;
 540     } else if (g_str_equal(arch, "s390x")) {
 541         init_bootfile_s390x(bootpath);
 542         extra_opts = use_shmem ? get_shmem_opts("128M", shmem_path) : NULL;
 543         cmd_src = g_strdup_printf("-machine accel=%s -m 128M"
 544                                   " -name source,debug-threads=on"
 545                                   " -serial file:%s/src_serial -bios %s %s",
 546                                   accel, tmpfs, bootpath,
 547                                   extra_opts ? extra_opts : "");
 548         cmd_dst = g_strdup_printf("-machine accel=%s -m 128M"
 549                                   " -name target,debug-threads=on"
 550                                   " -serial file:%s/dest_serial -bios %s"
 551                                   " -incoming %s %s",
 552                                   accel, tmpfs, bootpath, uri,
 553                                   extra_opts ? extra_opts : "");
 554         start_address = S390_TEST_MEM_START;
 555         end_address = S390_TEST_MEM_END;
 556     } else if (strcmp(arch, "ppc64") == 0) {
 557         extra_opts = use_shmem ? get_shmem_opts("256M", shmem_path) : NULL;
 558         cmd_src = g_strdup_printf("-machine accel=%s -m 256M -nodefaults"
 559                                   " -name source,debug-threads=on"
 560                                   " -serial file:%s/src_serial"
 561                                   " -prom-env 'use-nvramrc?=true' -prom-env "
 562                                   "'nvramrc=hex .\" _\" begin %x %x "
 563                                   "do i c@ 1 + i c! 1000 +loop .\" B\" 0 "
 564                                   "until' %s",  accel, tmpfs, end_address,
 565                                   start_address, extra_opts ? extra_opts : "");
 566         cmd_dst = g_strdup_printf("-machine accel=%s -m 256M"
 567                                   " -name target,debug-threads=on"
 568                                   " -serial file:%s/dest_serial"
 569                                   " -incoming %s %s",
 570                                   accel, tmpfs, uri,
 571                                   extra_opts ? extra_opts : "");
 572
 573         start_address = PPC_TEST_MEM_START;
 574         end_address = PPC_TEST_MEM_END;
 575     } else if (strcmp(arch, "aarch64") == 0) {
 576         init_bootfile(bootpath, aarch64_kernel);
 577         extra_opts = use_shmem ? get_shmem_opts("150M", shmem_path) : NULL;
 578         cmd_src = g_strdup_printf("-machine virt,accel=%s,gic-version=max "
 579                                   "-name vmsource,debug-threads=on -cpu max "
 580                                   "-m 150M -serial file:%s/src_serial "
 581                                   "-kernel %s %s",
 582                                   accel, tmpfs, bootpath,
 583                                   extra_opts ? extra_opts : "");
 584         cmd_dst = g_strdup_printf("-machine virt,accel=%s,gic-version=max "
 585                                   "-name vmdest,debug-threads=on -cpu max "
 586                                   "-m 150M -serial file:%s/dest_serial "
 587                                   "-kernel %s "
 588                                   "-incoming %s %s",
 589                                   accel, tmpfs, bootpath, uri,
 590                                   extra_opts ? extra_opts : "");
 591
 592         start_address = ARM_TEST_MEM_START;
 593         end_address = ARM_TEST_MEM_END;
 594
 595         g_assert(sizeof(aarch64_kernel) <= ARM_TEST_MAX_KERNEL_SIZE);
 596     } else {
 597         g_assert_not_reached();
 598     }
 599
 600     g_free(bootpath);
 601     g_free(extra_opts);
 602
 603     if (hide_stderr) {
 604         gchar *tmp;
 605         tmp = g_strdup_printf("%s 2>/dev/null", cmd_src);
 606         g_free(cmd_src);
 607         cmd_src = tmp;
 608
 609         tmp = g_strdup_printf("%s 2>/dev/null", cmd_dst);
 610         g_free(cmd_dst);
 611         cmd_dst = tmp;
 612     }
 613
 614     *from = qtest_start(cmd_src);
 615     g_free(cmd_src);
 616
 617     *to = qtest_init(cmd_dst);
 618     g_free(cmd_dst);
 619
 620     /*
 621      * Remove shmem file immediately to avoid memory leak in test failed case.
 622      * It's valid becase QEMU has already opened this file
 623      */
 624     if (use_shmem) {
 625         unlink(shmem_path);
 626         g_free(shmem_path);
 627     }
 628
 629     return 0;
 630 }
 631
 632 static void test_migrate_end(QTestState *from, QTestState *to, bool test_dest)
 633 {
 634     unsigned char dest_byte_a, dest_byte_b, dest_byte_c, dest_byte_d;
 635
 636     qtest_quit(from);
 637
 638     if (test_dest) {
 639         qtest_memread(to, start_address, &dest_byte_a, 1);
 640
 641         /* Destination still running, wait for a byte to change */
 642         do {
 643             qtest_memread(to, start_address, &dest_byte_b, 1);
 644             usleep(1000 * 10);
 645         } while (dest_byte_a == dest_byte_b);
 646
 647         qtest_qmp_discard_response(to, "{ 'execute' : 'stop'}");
 648
 649         /* With it stopped, check nothing changes */
 650         qtest_memread(to, start_address, &dest_byte_c, 1);
 651         usleep(1000 * 200);
 652         qtest_memread(to, start_address, &dest_byte_d, 1);
 653         g_assert_cmpint(dest_byte_c, ==, dest_byte_d);
 654
 655         check_guests_ram(to);
 656     }
 657
 658     qtest_quit(to);
 659
 660     cleanup("bootsect");
 661     cleanup("migsocket");
 662     cleanup("src_serial");
 663     cleanup("dest_serial");
 664 }
 665
 666 static void deprecated_set_downtime(QTestState *who, const double value)
 667 {
 668     QDict *rsp;
 669
 670     rsp = qtest_qmp(who,
 671                     "{ 'execute': 'migrate_set_downtime',"
 672                     " 'arguments': { 'value': %f } }", value);
 673     g_assert(qdict_haskey(rsp, "return"));
 674     qobject_unref(rsp);
 675     migrate_check_parameter(who, "downtime-limit", value * 1000);
 676 }
 677
 678 static void deprecated_set_speed(QTestState *who, long long value)
 679 {
 680     QDict *rsp;
 681
 682     rsp = qtest_qmp(who, "{ 'execute': 'migrate_set_speed',"
 683                           "'arguments': { 'value': %lld } }", value);
 684     g_assert(qdict_haskey(rsp, "return"));
 685     qobject_unref(rsp);
 686     migrate_check_parameter(who, "max-bandwidth", value);
 687 }
 688
 689 static void deprecated_set_cache_size(QTestState *who, long long value)
 690 {
 691     QDict *rsp;
 692
 693     rsp = qtest_qmp(who, "{ 'execute': 'migrate-set-cache-size',"
 694                          "'arguments': { 'value': %lld } }", value);
 695     g_assert(qdict_haskey(rsp, "return"));
 696     qobject_unref(rsp);
 697     migrate_check_parameter(who, "xbzrle-cache-size", value);
 698 }
 699
 700 static void test_deprecated(void)
 701 {
 702     QTestState *from;
 703
 704     from = qtest_start("-machine none");
 705
 706     deprecated_set_downtime(from, 0.12345);
 707     deprecated_set_speed(from, 12345);
 708     deprecated_set_cache_size(from, 4096);
 709
 710     qtest_quit(from);
 711 }
 712
 713 static int migrate_postcopy_prepare(QTestState **from_ptr,
 714                                      QTestState **to_ptr,
 715                                      bool hide_error)
 716 {
 717     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 718     QTestState *from, *to;
 719
 720     if (test_migrate_start(&from, &to, uri, hide_error, false)) {
 721         return -1;
 722     }
 723
 724     migrate_set_capability(from, "postcopy-ram", true);
 725     migrate_set_capability(to, "postcopy-ram", true);
 726     migrate_set_capability(to, "postcopy-blocktime", true);
 727
 728     /* We want to pick a speed slow enough that the test completes
 729      * quickly, but that it doesn't complete precopy even on a slow
 730      * machine, so also set the downtime.
 731      */
 732     migrate_set_parameter(from, "max-bandwidth", 100000000);
 733     migrate_set_parameter(from, "downtime-limit", 1);
 734
 735     /* Wait for the first serial output from the source */
 736     wait_for_serial("src_serial");
 737
 738     migrate(from, uri, "{}");
 739     g_free(uri);
 740
 741     wait_for_migration_pass(from);
 742
 743     *from_ptr = from;
 744     *to_ptr = to;
 745
 746     return 0;
 747 }
 748
 749 static void migrate_postcopy_complete(QTestState *from, QTestState *to)
 750 {
 751     wait_for_migration_complete(from);
 752
 753     /* Make sure we get at least one "B" on destination */
 754     wait_for_serial("dest_serial");
 755
 756     if (uffd_feature_thread_id) {
 757         read_blocktime(to);
 758     }
 759
 760     test_migrate_end(from, to, true);
 761 }
 762
 763 static void test_postcopy(void)
 764 {
 765     QTestState *from, *to;
 766
 767     if (migrate_postcopy_prepare(&from, &to, false)) {
 768         return;
 769     }
 770     migrate_postcopy_start(from, to);
 771     migrate_postcopy_complete(from, to);
 772 }
 773
 774 static void test_postcopy_recovery(void)
 775 {
 776     QTestState *from, *to;
 777     char *uri;
 778
 779     if (migrate_postcopy_prepare(&from, &to, true)) {
 780         return;
 781     }
 782
 783     /* Turn postcopy speed down, 4K/s is slow enough on any machines */
 784     migrate_set_parameter(from, "max-postcopy-bandwidth", 4096);
 785
 786     /* Now we start the postcopy */
 787     migrate_postcopy_start(from, to);
 788
 789     /*
 790      * Wait until postcopy is really started; we can only run the
 791      * migrate-pause command during a postcopy
 792      */
 793     wait_for_migration_status(from, "postcopy-active");
 794
 795     /*
 796      * Manually stop the postcopy migration. This emulates a network
 797      * failure with the migration socket
 798      */
 799     migrate_pause(from);
 800
 801     /*
 802      * Wait for destination side to reach postcopy-paused state.  The
 803      * migrate-recover command can only succeed if destination machine
 804      * is in the paused state
 805      */
 806     wait_for_migration_status(to, "postcopy-paused");
 807
 808     /*
 809      * Create a new socket to emulate a new channel that is different
 810      * from the broken migration channel; tell the destination to
 811      * listen to the new port
 812      */
 813     uri = g_strdup_printf("unix:%s/migsocket-recover", tmpfs);
 814     migrate_recover(to, uri);
 815
 816     /*
 817      * Try to rebuild the migration channel using the resume flag and
 818      * the newly created channel
 819      */
 820     wait_for_migration_status(from, "postcopy-paused");
 821     migrate(from, uri, "{'resume': true}");
 822     g_free(uri);
 823
 824     /* Restore the postcopy bandwidth to unlimited */
 825     migrate_set_parameter(from, "max-postcopy-bandwidth", 0);
 826
 827     migrate_postcopy_complete(from, to);
 828 }
 829
 830 static void test_baddest(void)
 831 {
 832     QTestState *from, *to;
 833     QDict *rsp_return;
 834     char *status;
 835     bool failed;
 836
 837     if (test_migrate_start(&from, &to, "tcp:0:0", true, false)) {
 838         return;
 839     }
 840     migrate(from, "tcp:0:0", "{}");
 841     do {
 842         status = migrate_query_status(from);
 843         g_assert(!strcmp(status, "setup") || !(strcmp(status, "failed")));
 844         failed = !strcmp(status, "failed");
 845         g_free(status);
 846     } while (!failed);
 847
 848     /* Is the machine currently running? */
 849     rsp_return = wait_command(from, "{ 'execute': 'query-status' }");
 850     g_assert(qdict_haskey(rsp_return, "running"));
 851     g_assert(qdict_get_bool(rsp_return, "running"));
 852     qobject_unref(rsp_return);
 853
 854     test_migrate_end(from, to, false);
 855 }
 856
 857 static void test_precopy_unix(void)
 858 {
 859     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 860     QTestState *from, *to;
 861
 862     if (test_migrate_start(&from, &to, uri, false, false)) {
 863         return;
 864     }
 865
 866     /* We want to pick a speed slow enough that the test completes
 867      * quickly, but that it doesn't complete precopy even on a slow
 868      * machine, so also set the downtime.
 869      */
 870     /* 1 ms should make it not converge*/
 871     migrate_set_parameter(from, "downtime-limit", 1);
 872     /* 1GB/s */
 873     migrate_set_parameter(from, "max-bandwidth", 1000000000);
 874
 875     /* Wait for the first serial output from the source */
 876     wait_for_serial("src_serial");
 877
 878     migrate(from, uri, "{}");
 879
 880     wait_for_migration_pass(from);
 881
 882     /* 300 ms should converge */
 883     migrate_set_parameter(from, "downtime-limit", 300);
 884
 885     if (!got_stop) {
 886         qtest_qmp_eventwait(from, "STOP");
 887     }
 888
 889     qtest_qmp_eventwait(to, "RESUME");
 890
 891     wait_for_serial("dest_serial");
 892     wait_for_migration_complete(from);
 893
 894     test_migrate_end(from, to, true);
 895     g_free(uri);
 896 }
 897
 898 #if 0
 899 /* Currently upset on aarch64 TCG */
 900 static void test_ignore_shared(void)
 901 {
 902     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 903     QTestState *from, *to;
 904
 905     if (test_migrate_start(&from, &to, uri, false, true)) {
 906         return;
 907     }
 908
 909     migrate_set_capability(from, "x-ignore-shared", true);
 910     migrate_set_capability(to, "x-ignore-shared", true);
 911
 912     /* Wait for the first serial output from the source */
 913     wait_for_serial("src_serial");
 914
 915     migrate(from, uri, "{}");
 916
 917     wait_for_migration_pass(from);
 918
 919     if (!got_stop) {
 920         qtest_qmp_eventwait(from, "STOP");
 921     }
 922
 923     qtest_qmp_eventwait(to, "RESUME");
 924
 925     wait_for_serial("dest_serial");
 926     wait_for_migration_complete(from);
 927
 928     /* Check whether shared RAM has been really skipped */
 929     g_assert_cmpint(read_ram_property_int(from, "transferred"), <, 1024 * 1024);
 930
 931     test_migrate_end(from, to, true);
 932     g_free(uri);
 933 }
 934 #endif
 935
 936 static void test_xbzrle(const char *uri)
 937 {
 938     QTestState *from, *to;
 939
 940     if (test_migrate_start(&from, &to, uri, false, false)) {
 941         return;
 942     }
 943
 944     /*
 945      * We want to pick a speed slow enough that the test completes
 946      * quickly, but that it doesn't complete precopy even on a slow
 947      * machine, so also set the downtime.
 948      */
 949     /* 1 ms should make it not converge*/
 950     migrate_set_parameter(from, "downtime-limit", 1);
 951     /* 1GB/s */
 952     migrate_set_parameter(from, "max-bandwidth", 1000000000);
 953
 954     migrate_set_parameter(from, "xbzrle-cache-size", 33554432);
 955
 956     migrate_set_capability(from, "xbzrle", "true");
 957     migrate_set_capability(to, "xbzrle", "true");
 958     /* Wait for the first serial output from the source */
 959     wait_for_serial("src_serial");
 960
 961     migrate(from, uri, "{}");
 962
 963     wait_for_migration_pass(from);
 964
 965     /* 300ms should converge */
 966     migrate_set_parameter(from, "downtime-limit", 300);
 967
 968     if (!got_stop) {
 969         qtest_qmp_eventwait(from, "STOP");
 970     }
 971     qtest_qmp_eventwait(to, "RESUME");
 972
 973     wait_for_serial("dest_serial");
 974     wait_for_migration_complete(from);
 975
 976     test_migrate_end(from, to, true);
 977 }
 978
 979 static void test_xbzrle_unix(void)
 980 {
 981     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 982
 983     test_xbzrle(uri);
 984     g_free(uri);
 985 }
 986
 987 static void test_precopy_tcp(void)
 988 {
 989     char *uri;
 990     QTestState *from, *to;
 991
 992     if (test_migrate_start(&from, &to, "tcp:127.0.0.1:0", false, false)) {
 993         return;
 994     }
 995
 996     /*
 997      * We want to pick a speed slow enough that the test completes
 998      * quickly, but that it doesn't complete precopy even on a slow
 999      * machine, so also set the downtime.
1000      */
1001     /* 1 ms should make it not converge*/
1002     migrate_set_parameter(from, "downtime-limit", 1);
1003     /* 1GB/s */
1004     migrate_set_parameter(from, "max-bandwidth", 1000000000);
1005
1006     /* Wait for the first serial output from the source */
1007     wait_for_serial("src_serial");
1008
1009     uri = migrate_get_socket_address(to, "socket-address");
1010
1011     migrate(from, uri, "{}");
1012
1013     wait_for_migration_pass(from);
1014
1015     /* 300ms should converge */
1016     migrate_set_parameter(from, "downtime-limit", 300);
1017
1018     if (!got_stop) {
1019         qtest_qmp_eventwait(from, "STOP");
1020     }
1021     qtest_qmp_eventwait(to, "RESUME");
1022
1023     wait_for_serial("dest_serial");
1024     wait_for_migration_complete(from);
1025
1026     test_migrate_end(from, to, true);
1027     g_free(uri);
1028 }
1029
1030 int main(int argc, char **argv)
1031 {
1032     char template[] = "/tmp/migration-test-XXXXXX";
1033     int ret;
1034
1035     g_test_init(&argc, &argv, NULL);
1036
1037     if (!ufd_version_check()) {
1038         return g_test_run();
1039     }
1040
1041     /*
1042      * On ppc64, the test only works with kvm-hv, but not with kvm-pr and TCG
1043      * is touchy due to race conditions on dirty bits (especially on PPC for
1044      * some reason)
1045      */
1046     if (g_str_equal(qtest_get_arch(), "ppc64") &&
1047         access("/sys/module/kvm_hv", F_OK)) {
1048         g_test_message("Skipping test: kvm_hv not available");
1049         return g_test_run();
1050     }
1051
1052     /*
1053      * Similar to ppc64, s390x seems to be touchy with TCG, so disable it
1054      * there until the problems are resolved
1055      */
1056     if (g_str_equal(qtest_get_arch(), "s390x")) {
1057 #if defined(HOST_S390X)
1058         if (access("/dev/kvm", R_OK | W_OK)) {
1059             g_test_message("Skipping test: kvm not available");
1060             return g_test_run();
1061         }
1062 #else
1063         g_test_message("Skipping test: Need s390x host to work properly");
1064         return g_test_run();
1065 #endif
1066     }
1067
1068     tmpfs = mkdtemp(template);
1069     if (!tmpfs) {
1070         g_test_message("mkdtemp on path (%s): %s", template, strerror(errno));
1071     }
1072     g_assert(tmpfs);
1073
1074     module_call_init(MODULE_INIT_QOM);
1075
1076     qtest_add_func("/migration/postcopy/unix", test_postcopy);
1077     qtest_add_func("/migration/postcopy/recovery", test_postcopy_recovery);
1078     qtest_add_func("/migration/deprecated", test_deprecated);
1079     qtest_add_func("/migration/bad_dest", test_baddest);
1080     qtest_add_func("/migration/precopy/unix", test_precopy_unix);
1081     qtest_add_func("/migration/precopy/tcp", test_precopy_tcp);
1082     /* qtest_add_func("/migration/ignore_shared", test_ignore_shared); */
1083     qtest_add_func("/migration/xbzrle/unix", test_xbzrle_unix);
1084
1085     ret = g_test_run();
1086
1087     g_assert_cmpint(ret, ==, 0);
1088
1089     ret = rmdir(tmpfs);
1090     if (ret != 0) {
1091         g_test_message("unable to rmdir: path (%s): %s",
1092                        tmpfs, strerror(errno));
1093     }
1094
1095     return ret;
1096 }