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