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