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 uint64_t get_migration_pass(QTestState *who)
 244 {
 245     return read_ram_property_int(who, "dirty-sync-count");
 246 }
 247
 248 static void read_blocktime(QTestState *who)
 249 {
 250     QDict *rsp_return;
 251
 252     rsp_return = migrate_query(who);
 253     g_assert(qdict_haskey(rsp_return, "postcopy-blocktime"));
 254     qobject_unref(rsp_return);
 255 }
 256
 257 static void wait_for_migration_status(QTestState *who,
 258                                       const char *goal)
 259 {
 260     while (true) {
 261         bool completed;
 262         char *status;
 263
 264         status = migrate_query_status(who);
 265         completed = strcmp(status, goal) == 0;
 266         g_assert_cmpstr(status, !=,  "failed");
 267         g_free(status);
 268         if (completed) {
 269             return;
 270         }
 271         usleep(1000);
 272     }
 273 }
 274
 275 static void wait_for_migration_complete(QTestState *who)
 276 {
 277     wait_for_migration_status(who, "completed");
 278 }
 279
 280 static void wait_for_migration_pass(QTestState *who)
 281 {
 282     uint64_t initial_pass = get_migration_pass(who);
 283     uint64_t pass;
 284
 285     /* Wait for the 1st sync */
 286     while (!got_stop && !initial_pass) {
 287         usleep(1000);
 288         initial_pass = get_migration_pass(who);
 289     }
 290
 291     do {
 292         usleep(1000);
 293         pass = get_migration_pass(who);
 294     } while (pass == initial_pass && !got_stop);
 295 }
 296
 297 static void check_guests_ram(QTestState *who)
 298 {
 299     /* Our ASM test will have been incrementing one byte from each page from
 300      * start_address to < end_address in order. This gives us a constraint
 301      * that any page's byte should be equal or less than the previous pages
 302      * byte (mod 256); and they should all be equal except for one transition
 303      * at the point where we meet the incrementer. (We're running this with
 304      * the guest stopped).
 305      */
 306     unsigned address;
 307     uint8_t first_byte;
 308     uint8_t last_byte;
 309     bool hit_edge = false;
 310     int bad = 0;
 311
 312     qtest_memread(who, start_address, &first_byte, 1);
 313     last_byte = first_byte;
 314
 315     for (address = start_address + TEST_MEM_PAGE_SIZE; address < end_address;
 316          address += TEST_MEM_PAGE_SIZE)
 317     {
 318         uint8_t b;
 319         qtest_memread(who, address, &b, 1);
 320         if (b != last_byte) {
 321             if (((b + 1) % 256) == last_byte && !hit_edge) {
 322                 /* This is OK, the guest stopped at the point of
 323                  * incrementing the previous page but didn't get
 324                  * to us yet.
 325                  */
 326                 hit_edge = true;
 327                 last_byte = b;
 328             } else {
 329                 bad++;
 330                 if (bad <= 10) {
 331                     fprintf(stderr, "Memory content inconsistency at %x"
 332                             " first_byte = %x last_byte = %x current = %x"
 333                             " hit_edge = %x\n",
 334                             address, first_byte, last_byte, b, hit_edge);
 335                 }
 336             }
 337         }
 338     }
 339     if (bad >= 10) {
 340         fprintf(stderr, "and in another %d pages", bad - 10);
 341     }
 342     g_assert(bad == 0);
 343 }
 344
 345 static void cleanup(const char *filename)
 346 {
 347     char *path = g_strdup_printf("%s/%s", tmpfs, filename);
 348
 349     unlink(path);
 350     g_free(path);
 351 }
 352
 353 static char *get_shmem_opts(const char *mem_size, const char *shmem_path)
 354 {
 355     return g_strdup_printf("-object memory-backend-file,id=mem0,size=%s"
 356                            ",mem-path=%s,share=on -numa node,memdev=mem0",
 357                            mem_size, shmem_path);
 358 }
 359
 360 static char *SocketAddress_to_str(SocketAddress *addr)
 361 {
 362     switch (addr->type) {
 363     case SOCKET_ADDRESS_TYPE_INET:
 364         return g_strdup_printf("tcp:%s:%s",
 365                                addr->u.inet.host,
 366                                addr->u.inet.port);
 367     case SOCKET_ADDRESS_TYPE_UNIX:
 368         return g_strdup_printf("unix:%s",
 369                                addr->u.q_unix.path);
 370     case SOCKET_ADDRESS_TYPE_FD:
 371         return g_strdup_printf("fd:%s", addr->u.fd.str);
 372     case SOCKET_ADDRESS_TYPE_VSOCK:
 373         return g_strdup_printf("tcp:%s:%s",
 374                                addr->u.vsock.cid,
 375                                addr->u.vsock.port);
 376     default:
 377         return g_strdup("unknown address type");
 378     }
 379 }
 380
 381 static char *migrate_get_socket_address(QTestState *who, const char *parameter)
 382 {
 383     QDict *rsp;
 384     char *result;
 385     Error *local_err = NULL;
 386     SocketAddressList *addrs;
 387     Visitor *iv = NULL;
 388     QObject *object;
 389
 390     rsp = migrate_query(who);
 391     object = qdict_get(rsp, parameter);
 392
 393     iv = qobject_input_visitor_new(object);
 394     visit_type_SocketAddressList(iv, NULL, &addrs, &local_err);
 395     visit_free(iv);
 396
 397     /* we are only using a single address */
 398     result = SocketAddress_to_str(addrs->value);
 399
 400     qapi_free_SocketAddressList(addrs);
 401     qobject_unref(rsp);
 402     return result;
 403 }
 404
 405 static long long migrate_get_parameter_int(QTestState *who,
 406                                            const char *parameter)
 407 {
 408     QDict *rsp;
 409     long long result;
 410
 411     rsp = wait_command(who, "{ 'execute': 'query-migrate-parameters' }");
 412     result = qdict_get_int(rsp, parameter);
 413     qobject_unref(rsp);
 414     return result;
 415 }
 416
 417 static void migrate_check_parameter_int(QTestState *who, const char *parameter,
 418                                         long long value)
 419 {
 420     long long result;
 421
 422     result = migrate_get_parameter_int(who, parameter);
 423     g_assert_cmpint(result, ==, value);
 424 }
 425
 426 static void migrate_set_parameter_int(QTestState *who, const char *parameter,
 427                                       long long value)
 428 {
 429     QDict *rsp;
 430
 431     rsp = qtest_qmp(who,
 432                     "{ 'execute': 'migrate-set-parameters',"
 433                     "'arguments': { %s: %lld } }",
 434                     parameter, value);
 435     g_assert(qdict_haskey(rsp, "return"));
 436     qobject_unref(rsp);
 437     migrate_check_parameter_int(who, parameter, value);
 438 }
 439
 440 static void migrate_pause(QTestState *who)
 441 {
 442     QDict *rsp;
 443
 444     rsp = wait_command(who, "{ 'execute': 'migrate-pause' }");
 445     qobject_unref(rsp);
 446 }
 447
 448 static void migrate_recover(QTestState *who, const char *uri)
 449 {
 450     QDict *rsp;
 451
 452     rsp = wait_command(who,
 453                        "{ 'execute': 'migrate-recover', "
 454                        "  'id': 'recover-cmd', "
 455                        "  'arguments': { 'uri': %s } }",
 456                        uri);
 457     qobject_unref(rsp);
 458 }
 459
 460 static void migrate_set_capability(QTestState *who, const char *capability,
 461                                    bool value)
 462 {
 463     QDict *rsp;
 464
 465     rsp = qtest_qmp(who,
 466                     "{ 'execute': 'migrate-set-capabilities',"
 467                     "'arguments': { "
 468                     "'capabilities': [ { "
 469                     "'capability': %s, 'state': %i } ] } }",
 470                     capability, value);
 471     g_assert(qdict_haskey(rsp, "return"));
 472     qobject_unref(rsp);
 473 }
 474
 475 /*
 476  * Send QMP command "migrate".
 477  * Arguments are built from @fmt... (formatted like
 478  * qobject_from_jsonf_nofail()) with "uri": @uri spliced in.
 479  */
 480 GCC_FMT_ATTR(3, 4)
 481 static void migrate(QTestState *who, const char *uri, const char *fmt, ...)
 482 {
 483     va_list ap;
 484     QDict *args, *rsp;
 485
 486     va_start(ap, fmt);
 487     args = qdict_from_vjsonf_nofail(fmt, ap);
 488     va_end(ap);
 489
 490     g_assert(!qdict_haskey(args, "uri"));
 491     qdict_put_str(args, "uri", uri);
 492
 493     rsp = qtest_qmp(who, "{ 'execute': 'migrate', 'arguments': %p}", args);
 494
 495     g_assert(qdict_haskey(rsp, "return"));
 496     qobject_unref(rsp);
 497 }
 498
 499 static void migrate_postcopy_start(QTestState *from, QTestState *to)
 500 {
 501     QDict *rsp;
 502
 503     rsp = wait_command(from, "{ 'execute': 'migrate-start-postcopy' }");
 504     qobject_unref(rsp);
 505
 506     if (!got_stop) {
 507         qtest_qmp_eventwait(from, "STOP");
 508     }
 509
 510     qtest_qmp_eventwait(to, "RESUME");
 511 }
 512
 513 static int test_migrate_start(QTestState **from, QTestState **to,
 514                                const char *uri, bool hide_stderr,
 515                                bool use_shmem, const char *opts_src,
 516                                const char *opts_dst)
 517 {
 518     gchar *cmd_src, *cmd_dst;
 519     char *bootpath = NULL;
 520     char *extra_opts = NULL;
 521     char *shmem_path = NULL;
 522     const char *arch = qtest_get_arch();
 523     const char *accel = "kvm:tcg";
 524
 525     opts_src = opts_src ? opts_src : "";
 526     opts_dst = opts_dst ? opts_dst : "";
 527
 528     if (use_shmem) {
 529         if (!g_file_test("/dev/shm", G_FILE_TEST_IS_DIR)) {
 530             g_test_skip("/dev/shm is not supported");
 531             return -1;
 532         }
 533         shmem_path = g_strdup_printf("/dev/shm/qemu-%d", getpid());
 534     }
 535
 536     got_stop = false;
 537     bootpath = g_strdup_printf("%s/bootsect", tmpfs);
 538     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
 539         /* the assembled x86 boot sector should be exactly one sector large */
 540         assert(sizeof(x86_bootsect) == 512);
 541         init_bootfile(bootpath, x86_bootsect, sizeof(x86_bootsect));
 542         extra_opts = use_shmem ? get_shmem_opts("150M", shmem_path) : NULL;
 543         cmd_src = g_strdup_printf("-machine accel=%s -m 150M"
 544                                   " -name source,debug-threads=on"
 545                                   " -serial file:%s/src_serial"
 546                                   " -drive file=%s,format=raw %s %s",
 547                                   accel, tmpfs, bootpath,
 548                                   extra_opts ? extra_opts : "", opts_src);
 549         cmd_dst = g_strdup_printf("-machine accel=%s -m 150M"
 550                                   " -name target,debug-threads=on"
 551                                   " -serial file:%s/dest_serial"
 552                                   " -drive file=%s,format=raw"
 553                                   " -incoming %s %s %s",
 554                                   accel, tmpfs, bootpath, uri,
 555                                   extra_opts ? extra_opts : "", opts_dst);
 556         start_address = X86_TEST_MEM_START;
 557         end_address = X86_TEST_MEM_END;
 558     } else if (g_str_equal(arch, "s390x")) {
 559         init_bootfile(bootpath, s390x_elf, sizeof(s390x_elf));
 560         extra_opts = use_shmem ? get_shmem_opts("128M", shmem_path) : NULL;
 561         cmd_src = g_strdup_printf("-machine accel=%s -m 128M"
 562                                   " -name source,debug-threads=on"
 563                                   " -serial file:%s/src_serial -bios %s %s %s",
 564                                   accel, tmpfs, bootpath,
 565                                   extra_opts ? extra_opts : "", opts_src);
 566         cmd_dst = g_strdup_printf("-machine accel=%s -m 128M"
 567                                   " -name target,debug-threads=on"
 568                                   " -serial file:%s/dest_serial -bios %s"
 569                                   " -incoming %s %s %s",
 570                                   accel, tmpfs, bootpath, uri,
 571                                   extra_opts ? extra_opts : "", opts_dst);
 572         start_address = S390_TEST_MEM_START;
 573         end_address = S390_TEST_MEM_END;
 574     } else if (strcmp(arch, "ppc64") == 0) {
 575         extra_opts = use_shmem ? get_shmem_opts("256M", shmem_path) : NULL;
 576         cmd_src = g_strdup_printf("-machine accel=%s -m 256M -nodefaults"
 577                                   " -name source,debug-threads=on"
 578                                   " -serial file:%s/src_serial"
 579                                   " -prom-env 'use-nvramrc?=true' -prom-env "
 580                                   "'nvramrc=hex .\" _\" begin %x %x "
 581                                   "do i c@ 1 + i c! 1000 +loop .\" B\" 0 "
 582                                   "until' %s %s",  accel, tmpfs, end_address,
 583                                   start_address, extra_opts ? extra_opts : "",
 584                                   opts_src);
 585         cmd_dst = g_strdup_printf("-machine accel=%s -m 256M"
 586                                   " -name target,debug-threads=on"
 587                                   " -serial file:%s/dest_serial"
 588                                   " -incoming %s %s %s",
 589                                   accel, tmpfs, uri,
 590                                   extra_opts ? extra_opts : "", opts_dst);
 591
 592         start_address = PPC_TEST_MEM_START;
 593         end_address = PPC_TEST_MEM_END;
 594     } else if (strcmp(arch, "aarch64") == 0) {
 595         init_bootfile(bootpath, aarch64_kernel, sizeof(aarch64_kernel));
 596         extra_opts = use_shmem ? get_shmem_opts("150M", shmem_path) : NULL;
 597         cmd_src = g_strdup_printf("-machine virt,accel=%s,gic-version=max "
 598                                   "-name vmsource,debug-threads=on -cpu max "
 599                                   "-m 150M -serial file:%s/src_serial "
 600                                   "-kernel %s %s %s",
 601                                   accel, tmpfs, bootpath,
 602                                   extra_opts ? extra_opts : "", opts_src);
 603         cmd_dst = g_strdup_printf("-machine virt,accel=%s,gic-version=max "
 604                                   "-name vmdest,debug-threads=on -cpu max "
 605                                   "-m 150M -serial file:%s/dest_serial "
 606                                   "-kernel %s "
 607                                   "-incoming %s %s %s",
 608                                   accel, tmpfs, bootpath, uri,
 609                                   extra_opts ? extra_opts : "", opts_dst);
 610
 611         start_address = ARM_TEST_MEM_START;
 612         end_address = ARM_TEST_MEM_END;
 613
 614         g_assert(sizeof(aarch64_kernel) <= ARM_TEST_MAX_KERNEL_SIZE);
 615     } else {
 616         g_assert_not_reached();
 617     }
 618
 619     g_free(bootpath);
 620     g_free(extra_opts);
 621
 622     if (hide_stderr) {
 623         gchar *tmp;
 624         tmp = g_strdup_printf("%s 2>/dev/null", cmd_src);
 625         g_free(cmd_src);
 626         cmd_src = tmp;
 627
 628         tmp = g_strdup_printf("%s 2>/dev/null", cmd_dst);
 629         g_free(cmd_dst);
 630         cmd_dst = tmp;
 631     }
 632
 633     *from = qtest_init(cmd_src);
 634     g_free(cmd_src);
 635
 636     *to = qtest_init(cmd_dst);
 637     g_free(cmd_dst);
 638
 639     /*
 640      * Remove shmem file immediately to avoid memory leak in test failed case.
 641      * It's valid becase QEMU has already opened this file
 642      */
 643     if (use_shmem) {
 644         unlink(shmem_path);
 645         g_free(shmem_path);
 646     }
 647
 648     return 0;
 649 }
 650
 651 static void test_migrate_end(QTestState *from, QTestState *to, bool test_dest)
 652 {
 653     unsigned char dest_byte_a, dest_byte_b, dest_byte_c, dest_byte_d;
 654
 655     qtest_quit(from);
 656
 657     if (test_dest) {
 658         qtest_memread(to, start_address, &dest_byte_a, 1);
 659
 660         /* Destination still running, wait for a byte to change */
 661         do {
 662             qtest_memread(to, start_address, &dest_byte_b, 1);
 663             usleep(1000 * 10);
 664         } while (dest_byte_a == dest_byte_b);
 665
 666         qtest_qmp_discard_response(to, "{ 'execute' : 'stop'}");
 667
 668         /* With it stopped, check nothing changes */
 669         qtest_memread(to, start_address, &dest_byte_c, 1);
 670         usleep(1000 * 200);
 671         qtest_memread(to, start_address, &dest_byte_d, 1);
 672         g_assert_cmpint(dest_byte_c, ==, dest_byte_d);
 673
 674         check_guests_ram(to);
 675     }
 676
 677     qtest_quit(to);
 678
 679     cleanup("bootsect");
 680     cleanup("migsocket");
 681     cleanup("src_serial");
 682     cleanup("dest_serial");
 683 }
 684
 685 static void deprecated_set_downtime(QTestState *who, const double value)
 686 {
 687     QDict *rsp;
 688
 689     rsp = qtest_qmp(who,
 690                     "{ 'execute': 'migrate_set_downtime',"
 691                     " 'arguments': { 'value': %f } }", value);
 692     g_assert(qdict_haskey(rsp, "return"));
 693     qobject_unref(rsp);
 694     migrate_check_parameter_int(who, "downtime-limit", value * 1000);
 695 }
 696
 697 static void deprecated_set_speed(QTestState *who, long long value)
 698 {
 699     QDict *rsp;
 700
 701     rsp = qtest_qmp(who, "{ 'execute': 'migrate_set_speed',"
 702                           "'arguments': { 'value': %lld } }", value);
 703     g_assert(qdict_haskey(rsp, "return"));
 704     qobject_unref(rsp);
 705     migrate_check_parameter_int(who, "max-bandwidth", value);
 706 }
 707
 708 static void deprecated_set_cache_size(QTestState *who, long long value)
 709 {
 710     QDict *rsp;
 711
 712     rsp = qtest_qmp(who, "{ 'execute': 'migrate-set-cache-size',"
 713                          "'arguments': { 'value': %lld } }", value);
 714     g_assert(qdict_haskey(rsp, "return"));
 715     qobject_unref(rsp);
 716     migrate_check_parameter_int(who, "xbzrle-cache-size", value);
 717 }
 718
 719 static void test_deprecated(void)
 720 {
 721     QTestState *from;
 722
 723     from = qtest_init("-machine none");
 724
 725     deprecated_set_downtime(from, 0.12345);
 726     deprecated_set_speed(from, 12345);
 727     deprecated_set_cache_size(from, 4096);
 728
 729     qtest_quit(from);
 730 }
 731
 732 static int migrate_postcopy_prepare(QTestState **from_ptr,
 733                                      QTestState **to_ptr,
 734                                      bool hide_error)
 735 {
 736     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 737     QTestState *from, *to;
 738
 739     if (test_migrate_start(&from, &to, uri, hide_error, false, NULL, NULL)) {
 740         return -1;
 741     }
 742
 743     migrate_set_capability(from, "postcopy-ram", true);
 744     migrate_set_capability(to, "postcopy-ram", true);
 745     migrate_set_capability(to, "postcopy-blocktime", true);
 746
 747     /* We want to pick a speed slow enough that the test completes
 748      * quickly, but that it doesn't complete precopy even on a slow
 749      * machine, so also set the downtime.
 750      */
 751     migrate_set_parameter_int(from, "max-bandwidth", 100000000);
 752     migrate_set_parameter_int(from, "downtime-limit", 1);
 753
 754     /* Wait for the first serial output from the source */
 755     wait_for_serial("src_serial");
 756
 757     migrate(from, uri, "{}");
 758     g_free(uri);
 759
 760     wait_for_migration_pass(from);
 761
 762     *from_ptr = from;
 763     *to_ptr = to;
 764
 765     return 0;
 766 }
 767
 768 static void migrate_postcopy_complete(QTestState *from, QTestState *to)
 769 {
 770     wait_for_migration_complete(from);
 771
 772     /* Make sure we get at least one "B" on destination */
 773     wait_for_serial("dest_serial");
 774
 775     if (uffd_feature_thread_id) {
 776         read_blocktime(to);
 777     }
 778
 779     test_migrate_end(from, to, true);
 780 }
 781
 782 static void test_postcopy(void)
 783 {
 784     QTestState *from, *to;
 785
 786     if (migrate_postcopy_prepare(&from, &to, false)) {
 787         return;
 788     }
 789     migrate_postcopy_start(from, to);
 790     migrate_postcopy_complete(from, to);
 791 }
 792
 793 static void test_postcopy_recovery(void)
 794 {
 795     QTestState *from, *to;
 796     char *uri;
 797
 798     if (migrate_postcopy_prepare(&from, &to, true)) {
 799         return;
 800     }
 801
 802     /* Turn postcopy speed down, 4K/s is slow enough on any machines */
 803     migrate_set_parameter_int(from, "max-postcopy-bandwidth", 4096);
 804
 805     /* Now we start the postcopy */
 806     migrate_postcopy_start(from, to);
 807
 808     /*
 809      * Wait until postcopy is really started; we can only run the
 810      * migrate-pause command during a postcopy
 811      */
 812     wait_for_migration_status(from, "postcopy-active");
 813
 814     /*
 815      * Manually stop the postcopy migration. This emulates a network
 816      * failure with the migration socket
 817      */
 818     migrate_pause(from);
 819
 820     /*
 821      * Wait for destination side to reach postcopy-paused state.  The
 822      * migrate-recover command can only succeed if destination machine
 823      * is in the paused state
 824      */
 825     wait_for_migration_status(to, "postcopy-paused");
 826
 827     /*
 828      * Create a new socket to emulate a new channel that is different
 829      * from the broken migration channel; tell the destination to
 830      * listen to the new port
 831      */
 832     uri = g_strdup_printf("unix:%s/migsocket-recover", tmpfs);
 833     migrate_recover(to, uri);
 834
 835     /*
 836      * Try to rebuild the migration channel using the resume flag and
 837      * the newly created channel
 838      */
 839     wait_for_migration_status(from, "postcopy-paused");
 840     migrate(from, uri, "{'resume': true}");
 841     g_free(uri);
 842
 843     /* Restore the postcopy bandwidth to unlimited */
 844     migrate_set_parameter_int(from, "max-postcopy-bandwidth", 0);
 845
 846     migrate_postcopy_complete(from, to);
 847 }
 848
 849 static void wait_for_migration_fail(QTestState *from, bool allow_active)
 850 {
 851     QDict *rsp_return;
 852     char *status;
 853     bool failed;
 854
 855     do {
 856         status = migrate_query_status(from);
 857         g_assert(!strcmp(status, "setup") || !strcmp(status, "failed") ||
 858                  (allow_active && !strcmp(status, "active")));
 859         failed = !strcmp(status, "failed");
 860         g_free(status);
 861     } while (!failed);
 862
 863     /* Is the machine currently running? */
 864     rsp_return = wait_command(from, "{ 'execute': 'query-status' }");
 865     g_assert(qdict_haskey(rsp_return, "running"));
 866     g_assert(qdict_get_bool(rsp_return, "running"));
 867     qobject_unref(rsp_return);
 868 }
 869
 870 static void test_baddest(void)
 871 {
 872     QTestState *from, *to;
 873
 874     if (test_migrate_start(&from, &to, "tcp:0:0", true, false, NULL, NULL)) {
 875         return;
 876     }
 877     migrate(from, "tcp:0:0", "{}");
 878     wait_for_migration_fail(from, false);
 879     test_migrate_end(from, to, false);
 880 }
 881
 882 static void test_precopy_unix(void)
 883 {
 884     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 885     QTestState *from, *to;
 886
 887     if (test_migrate_start(&from, &to, uri, false, false, NULL, NULL)) {
 888         return;
 889     }
 890
 891     /* We want to pick a speed slow enough that the test completes
 892      * quickly, but that it doesn't complete precopy even on a slow
 893      * machine, so also set the downtime.
 894      */
 895     /* 1 ms should make it not converge*/
 896     migrate_set_parameter_int(from, "downtime-limit", 1);
 897     /* 1GB/s */
 898     migrate_set_parameter_int(from, "max-bandwidth", 1000000000);
 899
 900     /* Wait for the first serial output from the source */
 901     wait_for_serial("src_serial");
 902
 903     migrate(from, uri, "{}");
 904
 905     wait_for_migration_pass(from);
 906
 907     /* 300 ms should converge */
 908     migrate_set_parameter_int(from, "downtime-limit", 300);
 909
 910     if (!got_stop) {
 911         qtest_qmp_eventwait(from, "STOP");
 912     }
 913
 914     qtest_qmp_eventwait(to, "RESUME");
 915
 916     wait_for_serial("dest_serial");
 917     wait_for_migration_complete(from);
 918
 919     test_migrate_end(from, to, true);
 920     g_free(uri);
 921 }
 922
 923 #if 0
 924 /* Currently upset on aarch64 TCG */
 925 static void test_ignore_shared(void)
 926 {
 927     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 928     QTestState *from, *to;
 929
 930     if (test_migrate_start(&from, &to, uri, false, true, NULL, NULL)) {
 931         return;
 932     }
 933
 934     migrate_set_capability(from, "x-ignore-shared", true);
 935     migrate_set_capability(to, "x-ignore-shared", true);
 936
 937     /* Wait for the first serial output from the source */
 938     wait_for_serial("src_serial");
 939
 940     migrate(from, uri, "{}");
 941
 942     wait_for_migration_pass(from);
 943
 944     if (!got_stop) {
 945         qtest_qmp_eventwait(from, "STOP");
 946     }
 947
 948     qtest_qmp_eventwait(to, "RESUME");
 949
 950     wait_for_serial("dest_serial");
 951     wait_for_migration_complete(from);
 952
 953     /* Check whether shared RAM has been really skipped */
 954     g_assert_cmpint(read_ram_property_int(from, "transferred"), <, 1024 * 1024);
 955
 956     test_migrate_end(from, to, true);
 957     g_free(uri);
 958 }
 959 #endif
 960
 961 static void test_xbzrle(const char *uri)
 962 {
 963     QTestState *from, *to;
 964
 965     if (test_migrate_start(&from, &to, uri, false, false, NULL, NULL)) {
 966         return;
 967     }
 968
 969     /*
 970      * We want to pick a speed slow enough that the test completes
 971      * quickly, but that it doesn't complete precopy even on a slow
 972      * machine, so also set the downtime.
 973      */
 974     /* 1 ms should make it not converge*/
 975     migrate_set_parameter_int(from, "downtime-limit", 1);
 976     /* 1GB/s */
 977     migrate_set_parameter_int(from, "max-bandwidth", 1000000000);
 978
 979     migrate_set_parameter_int(from, "xbzrle-cache-size", 33554432);
 980
 981     migrate_set_capability(from, "xbzrle", "true");
 982     migrate_set_capability(to, "xbzrle", "true");
 983     /* Wait for the first serial output from the source */
 984     wait_for_serial("src_serial");
 985
 986     migrate(from, uri, "{}");
 987
 988     wait_for_migration_pass(from);
 989
 990     /* 300ms should converge */
 991     migrate_set_parameter_int(from, "downtime-limit", 300);
 992
 993     if (!got_stop) {
 994         qtest_qmp_eventwait(from, "STOP");
 995     }
 996     qtest_qmp_eventwait(to, "RESUME");
 997
 998     wait_for_serial("dest_serial");
 999     wait_for_migration_complete(from);
1000
1001     test_migrate_end(from, to, true);
1002 }
1003
1004 static void test_xbzrle_unix(void)
1005 {
1006     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
1007
1008     test_xbzrle(uri);
1009     g_free(uri);
1010 }
1011
1012 static void test_precopy_tcp(void)
1013 {
1014     char *uri;
1015     QTestState *from, *to;
1016
1017     if (test_migrate_start(&from, &to, "tcp:127.0.0.1:0", false, false,
1018                            NULL, NULL)) {
1019         return;
1020     }
1021
1022     /*
1023      * We want to pick a speed slow enough that the test completes
1024      * quickly, but that it doesn't complete precopy even on a slow
1025      * machine, so also set the downtime.
1026      */
1027     /* 1 ms should make it not converge*/
1028     migrate_set_parameter_int(from, "downtime-limit", 1);
1029     /* 1GB/s */
1030     migrate_set_parameter_int(from, "max-bandwidth", 1000000000);
1031
1032     /* Wait for the first serial output from the source */
1033     wait_for_serial("src_serial");
1034
1035     uri = migrate_get_socket_address(to, "socket-address");
1036
1037     migrate(from, uri, "{}");
1038
1039     wait_for_migration_pass(from);
1040
1041     /* 300ms should converge */
1042     migrate_set_parameter_int(from, "downtime-limit", 300);
1043
1044     if (!got_stop) {
1045         qtest_qmp_eventwait(from, "STOP");
1046     }
1047     qtest_qmp_eventwait(to, "RESUME");
1048
1049     wait_for_serial("dest_serial");
1050     wait_for_migration_complete(from);
1051
1052     test_migrate_end(from, to, true);
1053     g_free(uri);
1054 }
1055
1056 static void test_migrate_fd_proto(void)
1057 {
1058     QTestState *from, *to;
1059     int ret;
1060     int pair[2];
1061     QDict *rsp;
1062     const char *error_desc;
1063
1064     if (test_migrate_start(&from, &to, "defer", false, false, NULL, NULL)) {
1065         return;
1066     }
1067
1068     /*
1069      * We want to pick a speed slow enough that the test completes
1070      * quickly, but that it doesn't complete precopy even on a slow
1071      * machine, so also set the downtime.
1072      */
1073     /* 1 ms should make it not converge */
1074     migrate_set_parameter_int(from, "downtime-limit", 1);
1075     /* 1GB/s */
1076     migrate_set_parameter_int(from, "max-bandwidth", 1000000000);
1077
1078     /* Wait for the first serial output from the source */
1079     wait_for_serial("src_serial");
1080
1081     /* Create two connected sockets for migration */
1082     ret = socketpair(PF_LOCAL, SOCK_STREAM, 0, pair);
1083     g_assert_cmpint(ret, ==, 0);
1084
1085     /* Send the 1st socket to the target */
1086     rsp = wait_command_fd(to, pair[0],
1087                           "{ 'execute': 'getfd',"
1088                           "  'arguments': { 'fdname': 'fd-mig' }}");
1089     qobject_unref(rsp);
1090     close(pair[0]);
1091
1092     /* Start incoming migration from the 1st socket */
1093     rsp = wait_command(to, "{ 'execute': 'migrate-incoming',"
1094                            "  'arguments': { 'uri': 'fd:fd-mig' }}");
1095     qobject_unref(rsp);
1096
1097     /* Send the 2nd socket to the target */
1098     rsp = wait_command_fd(from, pair[1],
1099                           "{ 'execute': 'getfd',"
1100                           "  'arguments': { 'fdname': 'fd-mig' }}");
1101     qobject_unref(rsp);
1102     close(pair[1]);
1103
1104     /* Start migration to the 2nd socket*/
1105     migrate(from, "fd:fd-mig", "{}");
1106
1107     wait_for_migration_pass(from);
1108
1109     /* 300ms should converge */
1110     migrate_set_parameter_int(from, "downtime-limit", 300);
1111
1112     if (!got_stop) {
1113         qtest_qmp_eventwait(from, "STOP");
1114     }
1115     qtest_qmp_eventwait(to, "RESUME");
1116
1117     /* Test closing fds */
1118     /* We assume, that QEMU removes named fd from its list,
1119      * so this should fail */
1120     rsp = qtest_qmp(from, "{ 'execute': 'closefd',"
1121                           "  'arguments': { 'fdname': 'fd-mig' }}");
1122     g_assert_true(qdict_haskey(rsp, "error"));
1123     error_desc = qdict_get_str(qdict_get_qdict(rsp, "error"), "desc");
1124     g_assert_cmpstr(error_desc, ==, "File descriptor named 'fd-mig' not found");
1125     qobject_unref(rsp);
1126
1127     rsp = qtest_qmp(to, "{ 'execute': 'closefd',"
1128                         "  'arguments': { 'fdname': 'fd-mig' }}");
1129     g_assert_true(qdict_haskey(rsp, "error"));
1130     error_desc = qdict_get_str(qdict_get_qdict(rsp, "error"), "desc");
1131     g_assert_cmpstr(error_desc, ==, "File descriptor named 'fd-mig' not found");
1132     qobject_unref(rsp);
1133
1134     /* Complete migration */
1135     wait_for_serial("dest_serial");
1136     wait_for_migration_complete(from);
1137     test_migrate_end(from, to, true);
1138 }
1139
1140 static void do_test_validate_uuid(const char *uuid_arg_src,
1141                                   const char *uuid_arg_dst,
1142                                   bool should_fail, bool hide_stderr)
1143 {
1144     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
1145     QTestState *from, *to;
1146
1147     if (test_migrate_start(&from, &to, uri, hide_stderr, false,
1148                            uuid_arg_src, uuid_arg_dst)) {
1149         return;
1150     }
1151
1152     /*
1153      * UUID validation is at the begin of migration. So, the main process of
1154      * migration is not interesting for us here. Thus, set huge downtime for
1155      * very fast migration.
1156      */
1157     migrate_set_parameter_int(from, "downtime-limit", 1000000);
1158     migrate_set_capability(from, "validate-uuid", true);
1159
1160     /* Wait for the first serial output from the source */
1161     wait_for_serial("src_serial");
1162
1163     migrate(from, uri, "{}");
1164
1165     if (should_fail) {
1166         qtest_set_expected_status(to, 1);
1167         wait_for_migration_fail(from, true);
1168     } else {
1169         wait_for_migration_complete(from);
1170     }
1171
1172     test_migrate_end(from, to, false);
1173     g_free(uri);
1174 }
1175
1176 static void test_validate_uuid(void)
1177 {
1178     do_test_validate_uuid("-uuid 11111111-1111-1111-1111-111111111111",
1179                           "-uuid 11111111-1111-1111-1111-111111111111",
1180                           false, false);
1181 }
1182
1183 static void test_validate_uuid_error(void)
1184 {
1185     do_test_validate_uuid("-uuid 11111111-1111-1111-1111-111111111111",
1186                           "-uuid 22222222-2222-2222-2222-222222222222",
1187                           true, true);
1188 }
1189
1190 static void test_validate_uuid_src_not_set(void)
1191 {
1192     do_test_validate_uuid(NULL, "-uuid 11111111-1111-1111-1111-111111111111",
1193                           false, true);
1194 }
1195
1196 static void test_validate_uuid_dst_not_set(void)
1197 {
1198     do_test_validate_uuid("-uuid 11111111-1111-1111-1111-111111111111", NULL,
1199                           false, true);
1200 }
1201
1202 int main(int argc, char **argv)
1203 {
1204     char template[] = "/tmp/migration-test-XXXXXX";
1205     int ret;
1206
1207     g_test_init(&argc, &argv, NULL);
1208
1209     if (!ufd_version_check()) {
1210         return g_test_run();
1211     }
1212
1213     /*
1214      * On ppc64, the test only works with kvm-hv, but not with kvm-pr and TCG
1215      * is touchy due to race conditions on dirty bits (especially on PPC for
1216      * some reason)
1217      */
1218     if (g_str_equal(qtest_get_arch(), "ppc64") &&
1219         access("/sys/module/kvm_hv", F_OK)) {
1220         g_test_message("Skipping test: kvm_hv not available");
1221         return g_test_run();
1222     }
1223
1224     /*
1225      * Similar to ppc64, s390x seems to be touchy with TCG, so disable it
1226      * there until the problems are resolved
1227      */
1228     if (g_str_equal(qtest_get_arch(), "s390x")) {
1229 #if defined(HOST_S390X)
1230         if (access("/dev/kvm", R_OK | W_OK)) {
1231             g_test_message("Skipping test: kvm not available");
1232             return g_test_run();
1233         }
1234 #else
1235         g_test_message("Skipping test: Need s390x host to work properly");
1236         return g_test_run();
1237 #endif
1238     }
1239
1240     tmpfs = mkdtemp(template);
1241     if (!tmpfs) {
1242         g_test_message("mkdtemp on path (%s): %s", template, strerror(errno));
1243     }
1244     g_assert(tmpfs);
1245
1246     module_call_init(MODULE_INIT_QOM);
1247
1248     qtest_add_func("/migration/postcopy/unix", test_postcopy);
1249     qtest_add_func("/migration/postcopy/recovery", test_postcopy_recovery);
1250     qtest_add_func("/migration/deprecated", test_deprecated);
1251     qtest_add_func("/migration/bad_dest", test_baddest);
1252     qtest_add_func("/migration/precopy/unix", test_precopy_unix);
1253     qtest_add_func("/migration/precopy/tcp", test_precopy_tcp);
1254     /* qtest_add_func("/migration/ignore_shared", test_ignore_shared); */
1255     qtest_add_func("/migration/xbzrle/unix", test_xbzrle_unix);
1256     qtest_add_func("/migration/fd_proto", test_migrate_fd_proto);
1257     qtest_add_func("/migration/validate_uuid", test_validate_uuid);
1258     qtest_add_func("/migration/validate_uuid_error", test_validate_uuid_error);
1259     qtest_add_func("/migration/validate_uuid_src_not_set",
1260                    test_validate_uuid_src_not_set);
1261     qtest_add_func("/migration/validate_uuid_dst_not_set",
1262                    test_validate_uuid_dst_not_set);
1263
1264     ret = g_test_run();
1265
1266     g_assert_cmpint(ret, ==, 0);
1267
1268     ret = rmdir(tmpfs);
1269     if (ret != 0) {
1270         g_test_message("unable to rmdir: path (%s): %s",
1271                        tmpfs, strerror(errno));
1272     }
1273
1274     return ret;
1275 }