tests/migration-test.c

   1 /*
   2  * QTest testcase for migration
   3  *
   4  * Copyright (c) 2016-2018 Red Hat, Inc. and/or its affiliates
   5  *   based on the vhost-user-test.c that is:
   6  *      Copyright (c) 2014 Virtual Open Systems Sarl.
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   9  * See the COPYING file in the top-level directory.
  10  *
  11  */
  12
  13 #include "qemu/osdep.h"
  14
  15 #include "libqtest.h"
  16 #include "qapi/qmp/qdict.h"
  17 #include "qapi/qmp/qjson.h"
  18 #include "qemu/option.h"
  19 #include "qemu/range.h"
  20 #include "qemu/sockets.h"
  21 #include "chardev/char.h"
  22 #include "sysemu/sysemu.h"
  23 #include "qapi/qapi-visit-sockets.h"
  24 #include "qapi/qobject-input-visitor.h"
  25 #include "qapi/qobject-output-visitor.h"
  26
  27 #include "migration/migration-test.h"
  28
  29 /* TODO actually test the results and get rid of this */
  30 #define qtest_qmp_discard_response(...) qobject_unref(qtest_qmp(__VA_ARGS__))
  31
  32 unsigned start_address;
  33 unsigned end_address;
  34 bool got_stop;
  35 static bool uffd_feature_thread_id;
  36
  37 #if defined(__linux__)
  38 #include <sys/syscall.h>
  39 #include <sys/vfs.h>
  40 #endif
  41
  42 #if defined(__linux__) && defined(__NR_userfaultfd) && defined(CONFIG_EVENTFD)
  43 #include <sys/eventfd.h>
  44 #include <sys/ioctl.h>
  45 #include <linux/userfaultfd.h>
  46
  47 static bool ufd_version_check(void)
  48 {
  49     struct uffdio_api api_struct;
  50     uint64_t ioctl_mask;
  51
  52     int ufd = syscall(__NR_userfaultfd, O_CLOEXEC);
  53
  54     if (ufd == -1) {
  55         g_test_message("Skipping test: userfaultfd not available");
  56         return false;
  57     }
  58
  59     api_struct.api = UFFD_API;
  60     api_struct.features = 0;
  61     if (ioctl(ufd, UFFDIO_API, &api_struct)) {
  62         g_test_message("Skipping test: UFFDIO_API failed");
  63         return false;
  64     }
  65     uffd_feature_thread_id = api_struct.features & UFFD_FEATURE_THREAD_ID;
  66
  67     ioctl_mask = (__u64)1 << _UFFDIO_REGISTER |
  68                  (__u64)1 << _UFFDIO_UNREGISTER;
  69     if ((api_struct.ioctls & ioctl_mask) != ioctl_mask) {
  70         g_test_message("Skipping test: Missing userfault feature");
  71         return false;
  72     }
  73
  74     return true;
  75 }
  76
  77 #else
  78 static bool ufd_version_check(void)
  79 {
  80     g_test_message("Skipping test: Userfault not available (builtdtime)");
  81     return false;
  82 }
  83
  84 #endif
  85
  86 static const char *tmpfs;
  87
  88 /* The boot file modifies memory area in [start_address, end_address)
  89  * repeatedly. It outputs a 'B' at a fixed rate while it's still running.
  90  */
  91 #include "tests/migration/i386/a-b-bootblock.h"
  92 #include "tests/migration/aarch64/a-b-kernel.h"
  93
  94 static void init_bootfile(const char *bootpath, void *content)
  95 {
  96     FILE *bootfile = fopen(bootpath, "wb");
  97
  98     g_assert_cmpint(fwrite(content, 512, 1, bootfile), ==, 1);
  99     fclose(bootfile);
 100 }
 101
 102 #include "tests/migration/s390x/a-b-bios.h"
 103
 104 static void init_bootfile_s390x(const char *bootpath)
 105 {
 106     FILE *bootfile = fopen(bootpath, "wb");
 107     size_t len = sizeof(s390x_elf);
 108
 109     g_assert_cmpint(fwrite(s390x_elf, len, 1, bootfile), ==, 1);
 110     fclose(bootfile);
 111 }
 112
 113 /*
 114  * Wait for some output in the serial output file,
 115  * we get an 'A' followed by an endless string of 'B's
 116  * but on the destination we won't have the A.
 117  */
 118 static void wait_for_serial(const char *side)
 119 {
 120     char *serialpath = g_strdup_printf("%s/%s", tmpfs, side);
 121     FILE *serialfile = fopen(serialpath, "r");
 122     const char *arch = qtest_get_arch();
 123     int started = (strcmp(side, "src_serial") == 0 &&
 124                    strcmp(arch, "ppc64") == 0) ? 0 : 1;
 125
 126     g_free(serialpath);
 127     do {
 128         int readvalue = fgetc(serialfile);
 129
 130         if (!started) {
 131             /* SLOF prints its banner before starting test,
 132              * to ignore it, mark the start of the test with '_',
 133              * ignore all characters until this marker
 134              */
 135             switch (readvalue) {
 136             case '_':
 137                 started = 1;
 138                 break;
 139             case EOF:
 140                 fseek(serialfile, 0, SEEK_SET);
 141                 usleep(1000);
 142                 break;
 143             }
 144             continue;
 145         }
 146         switch (readvalue) {
 147         case 'A':
 148             /* Fine */
 149             break;
 150
 151         case 'B':
 152             /* It's alive! */
 153             fclose(serialfile);
 154             return;
 155
 156         case EOF:
 157             started = (strcmp(side, "src_serial") == 0 &&
 158                        strcmp(arch, "ppc64") == 0) ? 0 : 1;
 159             fseek(serialfile, 0, SEEK_SET);
 160             usleep(1000);
 161             break;
 162
 163         default:
 164             fprintf(stderr, "Unexpected %d on %s serial\n", readvalue, side);
 165             g_assert_not_reached();
 166         }
 167     } while (true);
 168 }
 169
 170 static void stop_cb(void *opaque, const char *name, QDict *data)
 171 {
 172     if (!strcmp(name, "STOP")) {
 173         got_stop = true;
 174     }
 175 }
 176
 177 /*
 178  * Events can get in the way of responses we are actually waiting for.
 179  */
 180 GCC_FMT_ATTR(3, 4)
 181 static QDict *wait_command_fd(QTestState *who, int fd, const char *command, ...)
 182 {
 183     va_list ap;
 184
 185     va_start(ap, command);
 186     qtest_qmp_vsend_fds(who, &fd, 1, command, ap);
 187     va_end(ap);
 188
 189     return qtest_qmp_receive_success(who, stop_cb, NULL);
 190 }
 191
 192 /*
 193  * Events can get in the way of responses we are actually waiting for.
 194  */
 195 GCC_FMT_ATTR(2, 3)
 196 static QDict *wait_command(QTestState *who, const char *command, ...)
 197 {
 198     va_list ap;
 199
 200     va_start(ap, command);
 201     qtest_qmp_vsend(who, command, ap);
 202     va_end(ap);
 203
 204     return qtest_qmp_receive_success(who, stop_cb, NULL);
 205 }
 206
 207 /*
 208  * Note: caller is responsible to free the returned object via
 209  * qobject_unref() after use
 210  */
 211 static QDict *migrate_query(QTestState *who)
 212 {
 213     return wait_command(who, "{ 'execute': 'query-migrate' }");
 214 }
 215
 216 /*
 217  * Note: caller is responsible to free the returned object via
 218  * g_free() after use
 219  */
 220 static gchar *migrate_query_status(QTestState *who)
 221 {
 222     QDict *rsp_return = migrate_query(who);
 223     gchar *status = g_strdup(qdict_get_str(rsp_return, "status"));
 224
 225     g_assert(status);
 226     qobject_unref(rsp_return);
 227
 228     return status;
 229 }
 230
 231 /*
 232  * It's tricky to use qemu's migration event capability with qtest,
 233  * events suddenly appearing confuse the qmp()/hmp() responses.
 234  */
 235
 236 static int64_t read_ram_property_int(QTestState *who, const char *property)
 237 {
 238     QDict *rsp_return, *rsp_ram;
 239     int64_t result;
 240
 241     rsp_return = migrate_query(who);
 242     if (!qdict_haskey(rsp_return, "ram")) {
 243         /* Still in setup */
 244         result = 0;
 245     } else {
 246         rsp_ram = qdict_get_qdict(rsp_return, "ram");
 247         result = qdict_get_try_int(rsp_ram, property, 0);
 248     }
 249     qobject_unref(rsp_return);
 250     return result;
 251 }
 252
 253 static uint64_t get_migration_pass(QTestState *who)
 254 {
 255     return read_ram_property_int(who, "dirty-sync-count");
 256 }
 257
 258 static void read_blocktime(QTestState *who)
 259 {
 260     QDict *rsp_return;
 261
 262     rsp_return = migrate_query(who);
 263     g_assert(qdict_haskey(rsp_return, "postcopy-blocktime"));
 264     qobject_unref(rsp_return);
 265 }
 266
 267 static void wait_for_migration_status(QTestState *who,
 268                                       const char *goal)
 269 {
 270     while (true) {
 271         bool completed;
 272         char *status;
 273
 274         status = migrate_query_status(who);
 275         completed = strcmp(status, goal) == 0;
 276         g_assert_cmpstr(status, !=,  "failed");
 277         g_free(status);
 278         if (completed) {
 279             return;
 280         }
 281         usleep(1000);
 282     }
 283 }
 284
 285 static void wait_for_migration_complete(QTestState *who)
 286 {
 287     wait_for_migration_status(who, "completed");
 288 }
 289
 290 static void wait_for_migration_pass(QTestState *who)
 291 {
 292     uint64_t initial_pass = get_migration_pass(who);
 293     uint64_t pass;
 294
 295     /* Wait for the 1st sync */
 296     while (!got_stop && !initial_pass) {
 297         usleep(1000);
 298         initial_pass = get_migration_pass(who);
 299     }
 300
 301     do {
 302         usleep(1000);
 303         pass = get_migration_pass(who);
 304     } while (pass == initial_pass && !got_stop);
 305 }
 306
 307 static void check_guests_ram(QTestState *who)
 308 {
 309     /* Our ASM test will have been incrementing one byte from each page from
 310      * start_address to < end_address in order. This gives us a constraint
 311      * that any page's byte should be equal or less than the previous pages
 312      * byte (mod 256); and they should all be equal except for one transition
 313      * at the point where we meet the incrementer. (We're running this with
 314      * the guest stopped).
 315      */
 316     unsigned address;
 317     uint8_t first_byte;
 318     uint8_t last_byte;
 319     bool hit_edge = false;
 320     bool bad = false;
 321
 322     qtest_memread(who, start_address, &first_byte, 1);
 323     last_byte = first_byte;
 324
 325     for (address = start_address + TEST_MEM_PAGE_SIZE; address < end_address;
 326          address += TEST_MEM_PAGE_SIZE)
 327     {
 328         uint8_t b;
 329         qtest_memread(who, address, &b, 1);
 330         if (b != last_byte) {
 331             if (((b + 1) % 256) == last_byte && !hit_edge) {
 332                 /* This is OK, the guest stopped at the point of
 333                  * incrementing the previous page but didn't get
 334                  * to us yet.
 335                  */
 336                 hit_edge = true;
 337                 last_byte = b;
 338             } else {
 339                 fprintf(stderr, "Memory content inconsistency at %x"
 340                                 " first_byte = %x last_byte = %x current = %x"
 341                                 " hit_edge = %x\n",
 342                                 address, first_byte, last_byte, b, hit_edge);
 343                 bad = true;
 344             }
 345         }
 346     }
 347     g_assert_false(bad);
 348 }
 349
 350 static void cleanup(const char *filename)
 351 {
 352     char *path = g_strdup_printf("%s/%s", tmpfs, filename);
 353
 354     unlink(path);
 355     g_free(path);
 356 }
 357
 358 static char *get_shmem_opts(const char *mem_size, const char *shmem_path)
 359 {
 360     return g_strdup_printf("-object memory-backend-file,id=mem0,size=%s"
 361                            ",mem-path=%s,share=on -numa node,memdev=mem0",
 362                            mem_size, shmem_path);
 363 }
 364
 365 static char *SocketAddress_to_str(SocketAddress *addr)
 366 {
 367     switch (addr->type) {
 368     case SOCKET_ADDRESS_TYPE_INET:
 369         return g_strdup_printf("tcp:%s:%s",
 370                                addr->u.inet.host,
 371                                addr->u.inet.port);
 372     case SOCKET_ADDRESS_TYPE_UNIX:
 373         return g_strdup_printf("unix:%s",
 374                                addr->u.q_unix.path);
 375     case SOCKET_ADDRESS_TYPE_FD:
 376         return g_strdup_printf("fd:%s", addr->u.fd.str);
 377     case SOCKET_ADDRESS_TYPE_VSOCK:
 378         return g_strdup_printf("tcp:%s:%s",
 379                                addr->u.vsock.cid,
 380                                addr->u.vsock.port);
 381     default:
 382         return g_strdup("unknown address type");
 383     }
 384 }
 385
 386 static char *migrate_get_socket_address(QTestState *who, const char *parameter)
 387 {
 388     QDict *rsp;
 389     char *result;
 390     Error *local_err = NULL;
 391     SocketAddressList *addrs;
 392     Visitor *iv = NULL;
 393     QObject *object;
 394
 395     rsp = migrate_query(who);
 396     object = qdict_get(rsp, parameter);
 397
 398     iv = qobject_input_visitor_new(object);
 399     visit_type_SocketAddressList(iv, NULL, &addrs, &local_err);
 400     visit_free(iv);
 401
 402     /* we are only using a single address */
 403     result = SocketAddress_to_str(addrs->value);
 404
 405     qapi_free_SocketAddressList(addrs);
 406     qobject_unref(rsp);
 407     return result;
 408 }
 409
 410 static long long migrate_get_parameter(QTestState *who, const char *parameter)
 411 {
 412     QDict *rsp;
 413     long long result;
 414
 415     rsp = wait_command(who, "{ 'execute': 'query-migrate-parameters' }");
 416     result = qdict_get_int(rsp, parameter);
 417     qobject_unref(rsp);
 418     return result;
 419 }
 420
 421 static void migrate_check_parameter(QTestState *who, const char *parameter,
 422                                     long long value)
 423 {
 424     long long result;
 425
 426     result = migrate_get_parameter(who, parameter);
 427     g_assert_cmpint(result, ==, value);
 428 }
 429
 430 static void migrate_set_parameter(QTestState *who, const char *parameter,
 431                                   long long value)
 432 {
 433     QDict *rsp;
 434
 435     rsp = qtest_qmp(who,
 436                     "{ 'execute': 'migrate-set-parameters',"
 437                     "'arguments': { %s: %lld } }",
 438                     parameter, value);
 439     g_assert(qdict_haskey(rsp, "return"));
 440     qobject_unref(rsp);
 441     migrate_check_parameter(who, parameter, value);
 442 }
 443
 444 static void migrate_pause(QTestState *who)
 445 {
 446     QDict *rsp;
 447
 448     rsp = wait_command(who, "{ 'execute': 'migrate-pause' }");
 449     qobject_unref(rsp);
 450 }
 451
 452 static void migrate_recover(QTestState *who, const char *uri)
 453 {
 454     QDict *rsp;
 455
 456     rsp = wait_command(who,
 457                        "{ 'execute': 'migrate-recover', "
 458                        "  'id': 'recover-cmd', "
 459                        "  'arguments': { 'uri': %s } }",
 460                        uri);
 461     qobject_unref(rsp);
 462 }
 463
 464 static void migrate_set_capability(QTestState *who, const char *capability,
 465                                    bool value)
 466 {
 467     QDict *rsp;
 468
 469     rsp = qtest_qmp(who,
 470                     "{ 'execute': 'migrate-set-capabilities',"
 471                     "'arguments': { "
 472                     "'capabilities': [ { "
 473                     "'capability': %s, 'state': %i } ] } }",
 474                     capability, value);
 475     g_assert(qdict_haskey(rsp, "return"));
 476     qobject_unref(rsp);
 477 }
 478
 479 /*
 480  * Send QMP command "migrate".
 481  * Arguments are built from @fmt... (formatted like
 482  * qobject_from_jsonf_nofail()) with "uri": @uri spliced in.
 483  */
 484 GCC_FMT_ATTR(3, 4)
 485 static void migrate(QTestState *who, const char *uri, const char *fmt, ...)
 486 {
 487     va_list ap;
 488     QDict *args, *rsp;
 489
 490     va_start(ap, fmt);
 491     args = qdict_from_vjsonf_nofail(fmt, ap);
 492     va_end(ap);
 493
 494     g_assert(!qdict_haskey(args, "uri"));
 495     qdict_put_str(args, "uri", uri);
 496
 497     rsp = qmp("{ 'execute': 'migrate', 'arguments': %p}", args);
 498
 499     g_assert(qdict_haskey(rsp, "return"));
 500     qobject_unref(rsp);
 501 }
 502
 503 static void migrate_postcopy_start(QTestState *from, QTestState *to)
 504 {
 505     QDict *rsp;
 506
 507     rsp = wait_command(from, "{ 'execute': 'migrate-start-postcopy' }");
 508     qobject_unref(rsp);
 509
 510     if (!got_stop) {
 511         qtest_qmp_eventwait(from, "STOP");
 512     }
 513
 514     qtest_qmp_eventwait(to, "RESUME");
 515 }
 516
 517 static int test_migrate_start(QTestState **from, QTestState **to,
 518                                const char *uri, bool hide_stderr,
 519                                bool use_shmem)
 520 {
 521     gchar *cmd_src, *cmd_dst;
 522     char *bootpath = NULL;
 523     char *extra_opts = NULL;
 524     char *shmem_path = NULL;
 525     const char *arch = qtest_get_arch();
 526     const char *accel = "kvm:tcg";
 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         init_bootfile(bootpath, x86_bootsect);
 540         extra_opts = use_shmem ? get_shmem_opts("150M", shmem_path) : NULL;
 541         cmd_src = g_strdup_printf("-machine accel=%s -m 150M"
 542                                   " -name source,debug-threads=on"
 543                                   " -serial file:%s/src_serial"
 544                                   " -drive file=%s,format=raw %s",
 545                                   accel, tmpfs, bootpath,
 546                                   extra_opts ? extra_opts : "");
 547         cmd_dst = g_strdup_printf("-machine accel=%s -m 150M"
 548                                   " -name target,debug-threads=on"
 549                                   " -serial file:%s/dest_serial"
 550                                   " -drive file=%s,format=raw"
 551                                   " -incoming %s %s",
 552                                   accel, tmpfs, bootpath, uri,
 553                                   extra_opts ? extra_opts : "");
 554         start_address = X86_TEST_MEM_START;
 555         end_address = X86_TEST_MEM_END;
 556     } else if (g_str_equal(arch, "s390x")) {
 557         init_bootfile_s390x(bootpath);
 558         extra_opts = use_shmem ? get_shmem_opts("128M", shmem_path) : NULL;
 559         cmd_src = g_strdup_printf("-machine accel=%s -m 128M"
 560                                   " -name source,debug-threads=on"
 561                                   " -serial file:%s/src_serial -bios %s %s",
 562                                   accel, tmpfs, bootpath,
 563                                   extra_opts ? extra_opts : "");
 564         cmd_dst = g_strdup_printf("-machine accel=%s -m 128M"
 565                                   " -name target,debug-threads=on"
 566                                   " -serial file:%s/dest_serial -bios %s"
 567                                   " -incoming %s %s",
 568                                   accel, tmpfs, bootpath, uri,
 569                                   extra_opts ? extra_opts : "");
 570         start_address = S390_TEST_MEM_START;
 571         end_address = S390_TEST_MEM_END;
 572     } else if (strcmp(arch, "ppc64") == 0) {
 573         extra_opts = use_shmem ? get_shmem_opts("256M", shmem_path) : NULL;
 574         cmd_src = g_strdup_printf("-machine accel=%s -m 256M -nodefaults"
 575                                   " -name source,debug-threads=on"
 576                                   " -serial file:%s/src_serial"
 577                                   " -prom-env 'use-nvramrc?=true' -prom-env "
 578                                   "'nvramrc=hex .\" _\" begin %x %x "
 579                                   "do i c@ 1 + i c! 1000 +loop .\" B\" 0 "
 580                                   "until' %s",  accel, tmpfs, end_address,
 581                                   start_address, extra_opts ? extra_opts : "");
 582         cmd_dst = g_strdup_printf("-machine accel=%s -m 256M"
 583                                   " -name target,debug-threads=on"
 584                                   " -serial file:%s/dest_serial"
 585                                   " -incoming %s %s",
 586                                   accel, tmpfs, uri,
 587                                   extra_opts ? extra_opts : "");
 588
 589         start_address = PPC_TEST_MEM_START;
 590         end_address = PPC_TEST_MEM_END;
 591     } else if (strcmp(arch, "aarch64") == 0) {
 592         init_bootfile(bootpath, aarch64_kernel);
 593         extra_opts = use_shmem ? get_shmem_opts("150M", shmem_path) : NULL;
 594         cmd_src = g_strdup_printf("-machine virt,accel=%s,gic-version=max "
 595                                   "-name vmsource,debug-threads=on -cpu max "
 596                                   "-m 150M -serial file:%s/src_serial "
 597                                   "-kernel %s %s",
 598                                   accel, tmpfs, bootpath,
 599                                   extra_opts ? extra_opts : "");
 600         cmd_dst = g_strdup_printf("-machine virt,accel=%s,gic-version=max "
 601                                   "-name vmdest,debug-threads=on -cpu max "
 602                                   "-m 150M -serial file:%s/dest_serial "
 603                                   "-kernel %s "
 604                                   "-incoming %s %s",
 605                                   accel, tmpfs, bootpath, uri,
 606                                   extra_opts ? extra_opts : "");
 607
 608         start_address = ARM_TEST_MEM_START;
 609         end_address = ARM_TEST_MEM_END;
 610
 611         g_assert(sizeof(aarch64_kernel) <= ARM_TEST_MAX_KERNEL_SIZE);
 612     } else {
 613         g_assert_not_reached();
 614     }
 615
 616     g_free(bootpath);
 617     g_free(extra_opts);
 618
 619     if (hide_stderr) {
 620         gchar *tmp;
 621         tmp = g_strdup_printf("%s 2>/dev/null", cmd_src);
 622         g_free(cmd_src);
 623         cmd_src = tmp;
 624
 625         tmp = g_strdup_printf("%s 2>/dev/null", cmd_dst);
 626         g_free(cmd_dst);
 627         cmd_dst = tmp;
 628     }
 629
 630     *from = qtest_start(cmd_src);
 631     g_free(cmd_src);
 632
 633     *to = qtest_init(cmd_dst);
 634     g_free(cmd_dst);
 635
 636     /*
 637      * Remove shmem file immediately to avoid memory leak in test failed case.
 638      * It's valid becase QEMU has already opened this file
 639      */
 640     if (use_shmem) {
 641         unlink(shmem_path);
 642         g_free(shmem_path);
 643     }
 644
 645     return 0;
 646 }
 647
 648 static void test_migrate_end(QTestState *from, QTestState *to, bool test_dest)
 649 {
 650     unsigned char dest_byte_a, dest_byte_b, dest_byte_c, dest_byte_d;
 651
 652     qtest_quit(from);
 653
 654     if (test_dest) {
 655         qtest_memread(to, start_address, &dest_byte_a, 1);
 656
 657         /* Destination still running, wait for a byte to change */
 658         do {
 659             qtest_memread(to, start_address, &dest_byte_b, 1);
 660             usleep(1000 * 10);
 661         } while (dest_byte_a == dest_byte_b);
 662
 663         qtest_qmp_discard_response(to, "{ 'execute' : 'stop'}");
 664
 665         /* With it stopped, check nothing changes */
 666         qtest_memread(to, start_address, &dest_byte_c, 1);
 667         usleep(1000 * 200);
 668         qtest_memread(to, start_address, &dest_byte_d, 1);
 669         g_assert_cmpint(dest_byte_c, ==, dest_byte_d);
 670
 671         check_guests_ram(to);
 672     }
 673
 674     qtest_quit(to);
 675
 676     cleanup("bootsect");
 677     cleanup("migsocket");
 678     cleanup("src_serial");
 679     cleanup("dest_serial");
 680 }
 681
 682 static void deprecated_set_downtime(QTestState *who, const double value)
 683 {
 684     QDict *rsp;
 685
 686     rsp = qtest_qmp(who,
 687                     "{ 'execute': 'migrate_set_downtime',"
 688                     " 'arguments': { 'value': %f } }", value);
 689     g_assert(qdict_haskey(rsp, "return"));
 690     qobject_unref(rsp);
 691     migrate_check_parameter(who, "downtime-limit", value * 1000);
 692 }
 693
 694 static void deprecated_set_speed(QTestState *who, long long value)
 695 {
 696     QDict *rsp;
 697
 698     rsp = qtest_qmp(who, "{ 'execute': 'migrate_set_speed',"
 699                           "'arguments': { 'value': %lld } }", value);
 700     g_assert(qdict_haskey(rsp, "return"));
 701     qobject_unref(rsp);
 702     migrate_check_parameter(who, "max-bandwidth", value);
 703 }
 704
 705 static void deprecated_set_cache_size(QTestState *who, long long value)
 706 {
 707     QDict *rsp;
 708
 709     rsp = qtest_qmp(who, "{ 'execute': 'migrate-set-cache-size',"
 710                          "'arguments': { 'value': %lld } }", value);
 711     g_assert(qdict_haskey(rsp, "return"));
 712     qobject_unref(rsp);
 713     migrate_check_parameter(who, "xbzrle-cache-size", value);
 714 }
 715
 716 static void test_deprecated(void)
 717 {
 718     QTestState *from;
 719
 720     from = qtest_start("-machine none");
 721
 722     deprecated_set_downtime(from, 0.12345);
 723     deprecated_set_speed(from, 12345);
 724     deprecated_set_cache_size(from, 4096);
 725
 726     qtest_quit(from);
 727 }
 728
 729 static int migrate_postcopy_prepare(QTestState **from_ptr,
 730                                      QTestState **to_ptr,
 731                                      bool hide_error)
 732 {
 733     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 734     QTestState *from, *to;
 735
 736     if (test_migrate_start(&from, &to, uri, hide_error, false)) {
 737         return -1;
 738     }
 739
 740     migrate_set_capability(from, "postcopy-ram", true);
 741     migrate_set_capability(to, "postcopy-ram", true);
 742     migrate_set_capability(to, "postcopy-blocktime", true);
 743
 744     /* We want to pick a speed slow enough that the test completes
 745      * quickly, but that it doesn't complete precopy even on a slow
 746      * machine, so also set the downtime.
 747      */
 748     migrate_set_parameter(from, "max-bandwidth", 100000000);
 749     migrate_set_parameter(from, "downtime-limit", 1);
 750
 751     /* Wait for the first serial output from the source */
 752     wait_for_serial("src_serial");
 753
 754     migrate(from, uri, "{}");
 755     g_free(uri);
 756
 757     wait_for_migration_pass(from);
 758
 759     *from_ptr = from;
 760     *to_ptr = to;
 761
 762     return 0;
 763 }
 764
 765 static void migrate_postcopy_complete(QTestState *from, QTestState *to)
 766 {
 767     wait_for_migration_complete(from);
 768
 769     /* Make sure we get at least one "B" on destination */
 770     wait_for_serial("dest_serial");
 771
 772     if (uffd_feature_thread_id) {
 773         read_blocktime(to);
 774     }
 775
 776     test_migrate_end(from, to, true);
 777 }
 778
 779 static void test_postcopy(void)
 780 {
 781     QTestState *from, *to;
 782
 783     if (migrate_postcopy_prepare(&from, &to, false)) {
 784         return;
 785     }
 786     migrate_postcopy_start(from, to);
 787     migrate_postcopy_complete(from, to);
 788 }
 789
 790 static void test_postcopy_recovery(void)
 791 {
 792     QTestState *from, *to;
 793     char *uri;
 794
 795     if (migrate_postcopy_prepare(&from, &to, true)) {
 796         return;
 797     }
 798
 799     /* Turn postcopy speed down, 4K/s is slow enough on any machines */
 800     migrate_set_parameter(from, "max-postcopy-bandwidth", 4096);
 801
 802     /* Now we start the postcopy */
 803     migrate_postcopy_start(from, to);
 804
 805     /*
 806      * Wait until postcopy is really started; we can only run the
 807      * migrate-pause command during a postcopy
 808      */
 809     wait_for_migration_status(from, "postcopy-active");
 810
 811     /*
 812      * Manually stop the postcopy migration. This emulates a network
 813      * failure with the migration socket
 814      */
 815     migrate_pause(from);
 816
 817     /*
 818      * Wait for destination side to reach postcopy-paused state.  The
 819      * migrate-recover command can only succeed if destination machine
 820      * is in the paused state
 821      */
 822     wait_for_migration_status(to, "postcopy-paused");
 823
 824     /*
 825      * Create a new socket to emulate a new channel that is different
 826      * from the broken migration channel; tell the destination to
 827      * listen to the new port
 828      */
 829     uri = g_strdup_printf("unix:%s/migsocket-recover", tmpfs);
 830     migrate_recover(to, uri);
 831
 832     /*
 833      * Try to rebuild the migration channel using the resume flag and
 834      * the newly created channel
 835      */
 836     wait_for_migration_status(from, "postcopy-paused");
 837     migrate(from, uri, "{'resume': true}");
 838     g_free(uri);
 839
 840     /* Restore the postcopy bandwidth to unlimited */
 841     migrate_set_parameter(from, "max-postcopy-bandwidth", 0);
 842
 843     migrate_postcopy_complete(from, to);
 844 }
 845
 846 static void test_baddest(void)
 847 {
 848     QTestState *from, *to;
 849     QDict *rsp_return;
 850     char *status;
 851     bool failed;
 852
 853     if (test_migrate_start(&from, &to, "tcp:0:0", true, false)) {
 854         return;
 855     }
 856     migrate(from, "tcp:0:0", "{}");
 857     do {
 858         status = migrate_query_status(from);
 859         g_assert(!strcmp(status, "setup") || !(strcmp(status, "failed")));
 860         failed = !strcmp(status, "failed");
 861         g_free(status);
 862     } while (!failed);
 863
 864     /* Is the machine currently running? */
 865     rsp_return = wait_command(from, "{ 'execute': 'query-status' }");
 866     g_assert(qdict_haskey(rsp_return, "running"));
 867     g_assert(qdict_get_bool(rsp_return, "running"));
 868     qobject_unref(rsp_return);
 869
 870     test_migrate_end(from, to, false);
 871 }
 872
 873 static void test_precopy_unix(void)
 874 {
 875     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 876     QTestState *from, *to;
 877
 878     if (test_migrate_start(&from, &to, uri, false, false)) {
 879         return;
 880     }
 881
 882     /* We want to pick a speed slow enough that the test completes
 883      * quickly, but that it doesn't complete precopy even on a slow
 884      * machine, so also set the downtime.
 885      */
 886     /* 1 ms should make it not converge*/
 887     migrate_set_parameter(from, "downtime-limit", 1);
 888     /* 1GB/s */
 889     migrate_set_parameter(from, "max-bandwidth", 1000000000);
 890
 891     /* Wait for the first serial output from the source */
 892     wait_for_serial("src_serial");
 893
 894     migrate(from, uri, "{}");
 895
 896     wait_for_migration_pass(from);
 897
 898     /* 300 ms should converge */
 899     migrate_set_parameter(from, "downtime-limit", 300);
 900
 901     if (!got_stop) {
 902         qtest_qmp_eventwait(from, "STOP");
 903     }
 904
 905     qtest_qmp_eventwait(to, "RESUME");
 906
 907     wait_for_serial("dest_serial");
 908     wait_for_migration_complete(from);
 909
 910     test_migrate_end(from, to, true);
 911     g_free(uri);
 912 }
 913
 914 #if 0
 915 /* Currently upset on aarch64 TCG */
 916 static void test_ignore_shared(void)
 917 {
 918     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 919     QTestState *from, *to;
 920
 921     if (test_migrate_start(&from, &to, uri, false, true)) {
 922         return;
 923     }
 924
 925     migrate_set_capability(from, "x-ignore-shared", true);
 926     migrate_set_capability(to, "x-ignore-shared", true);
 927
 928     /* Wait for the first serial output from the source */
 929     wait_for_serial("src_serial");
 930
 931     migrate(from, uri, "{}");
 932
 933     wait_for_migration_pass(from);
 934
 935     if (!got_stop) {
 936         qtest_qmp_eventwait(from, "STOP");
 937     }
 938
 939     qtest_qmp_eventwait(to, "RESUME");
 940
 941     wait_for_serial("dest_serial");
 942     wait_for_migration_complete(from);
 943
 944     /* Check whether shared RAM has been really skipped */
 945     g_assert_cmpint(read_ram_property_int(from, "transferred"), <, 1024 * 1024);
 946
 947     test_migrate_end(from, to, true);
 948     g_free(uri);
 949 }
 950 #endif
 951
 952 static void test_xbzrle(const char *uri)
 953 {
 954     QTestState *from, *to;
 955
 956     if (test_migrate_start(&from, &to, uri, false, false)) {
 957         return;
 958     }
 959
 960     /*
 961      * We want to pick a speed slow enough that the test completes
 962      * quickly, but that it doesn't complete precopy even on a slow
 963      * machine, so also set the downtime.
 964      */
 965     /* 1 ms should make it not converge*/
 966     migrate_set_parameter(from, "downtime-limit", 1);
 967     /* 1GB/s */
 968     migrate_set_parameter(from, "max-bandwidth", 1000000000);
 969
 970     migrate_set_parameter(from, "xbzrle-cache-size", 33554432);
 971
 972     migrate_set_capability(from, "xbzrle", "true");
 973     migrate_set_capability(to, "xbzrle", "true");
 974     /* Wait for the first serial output from the source */
 975     wait_for_serial("src_serial");
 976
 977     migrate(from, uri, "{}");
 978
 979     wait_for_migration_pass(from);
 980
 981     /* 300ms should converge */
 982     migrate_set_parameter(from, "downtime-limit", 300);
 983
 984     if (!got_stop) {
 985         qtest_qmp_eventwait(from, "STOP");
 986     }
 987     qtest_qmp_eventwait(to, "RESUME");
 988
 989     wait_for_serial("dest_serial");
 990     wait_for_migration_complete(from);
 991
 992     test_migrate_end(from, to, true);
 993 }
 994
 995 static void test_xbzrle_unix(void)
 996 {
 997     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 998
 999     test_xbzrle(uri);
1000     g_free(uri);
1001 }
1002
1003 static void test_precopy_tcp(void)
1004 {
1005     char *uri;
1006     QTestState *from, *to;
1007
1008     if (test_migrate_start(&from, &to, "tcp:127.0.0.1:0", false, false)) {
1009         return;
1010     }
1011
1012     /*
1013      * We want to pick a speed slow enough that the test completes
1014      * quickly, but that it doesn't complete precopy even on a slow
1015      * machine, so also set the downtime.
1016      */
1017     /* 1 ms should make it not converge*/
1018     migrate_set_parameter(from, "downtime-limit", 1);
1019     /* 1GB/s */
1020     migrate_set_parameter(from, "max-bandwidth", 1000000000);
1021
1022     /* Wait for the first serial output from the source */
1023     wait_for_serial("src_serial");
1024
1025     uri = migrate_get_socket_address(to, "socket-address");
1026
1027     migrate(from, uri, "{}");
1028
1029     wait_for_migration_pass(from);
1030
1031     /* 300ms should converge */
1032     migrate_set_parameter(from, "downtime-limit", 300);
1033
1034     if (!got_stop) {
1035         qtest_qmp_eventwait(from, "STOP");
1036     }
1037     qtest_qmp_eventwait(to, "RESUME");
1038
1039     wait_for_serial("dest_serial");
1040     wait_for_migration_complete(from);
1041
1042     test_migrate_end(from, to, true);
1043     g_free(uri);
1044 }
1045
1046 static void test_migrate_fd_proto(void)
1047 {
1048     QTestState *from, *to;
1049     int ret;
1050     int pair[2];
1051     QDict *rsp;
1052     const char *error_desc;
1053
1054     if (test_migrate_start(&from, &to, "defer", false, false)) {
1055         return;
1056     }
1057
1058     /*
1059      * We want to pick a speed slow enough that the test completes
1060      * quickly, but that it doesn't complete precopy even on a slow
1061      * machine, so also set the downtime.
1062      */
1063     /* 1 ms should make it not converge */
1064     migrate_set_parameter(from, "downtime-limit", 1);
1065     /* 1GB/s */
1066     migrate_set_parameter(from, "max-bandwidth", 1000000000);
1067
1068     /* Wait for the first serial output from the source */
1069     wait_for_serial("src_serial");
1070
1071     /* Create two connected sockets for migration */
1072     ret = socketpair(PF_LOCAL, SOCK_STREAM, 0, pair);
1073     g_assert_cmpint(ret, ==, 0);
1074
1075     /* Send the 1st socket to the target */
1076     rsp = wait_command_fd(to, pair[0],
1077                           "{ 'execute': 'getfd',"
1078                           "  'arguments': { 'fdname': 'fd-mig' }}");
1079     qobject_unref(rsp);
1080     close(pair[0]);
1081
1082     /* Start incoming migration from the 1st socket */
1083     rsp = wait_command(to, "{ 'execute': 'migrate-incoming',"
1084                            "  'arguments': { 'uri': 'fd:fd-mig' }}");
1085     qobject_unref(rsp);
1086
1087     /* Send the 2nd socket to the target */
1088     rsp = wait_command_fd(from, pair[1],
1089                           "{ 'execute': 'getfd',"
1090                           "  'arguments': { 'fdname': 'fd-mig' }}");
1091     qobject_unref(rsp);
1092     close(pair[1]);
1093
1094     /* Start migration to the 2nd socket*/
1095     migrate(from, "fd:fd-mig", "{}");
1096
1097     wait_for_migration_pass(from);
1098
1099     /* 300ms should converge */
1100     migrate_set_parameter(from, "downtime-limit", 300);
1101
1102     if (!got_stop) {
1103         qtest_qmp_eventwait(from, "STOP");
1104     }
1105     qtest_qmp_eventwait(to, "RESUME");
1106
1107     /* Test closing fds */
1108     /* We assume, that QEMU removes named fd from its list,
1109      * so this should fail */
1110     rsp = qtest_qmp(from, "{ 'execute': 'closefd',"
1111                           "  'arguments': { 'fdname': 'fd-mig' }}");
1112     g_assert_true(qdict_haskey(rsp, "error"));
1113     error_desc = qdict_get_str(qdict_get_qdict(rsp, "error"), "desc");
1114     g_assert_cmpstr(error_desc, ==, "File descriptor named 'fd-mig' not found");
1115     qobject_unref(rsp);
1116
1117     rsp = qtest_qmp(to, "{ 'execute': 'closefd',"
1118                         "  'arguments': { 'fdname': 'fd-mig' }}");
1119     g_assert_true(qdict_haskey(rsp, "error"));
1120     error_desc = qdict_get_str(qdict_get_qdict(rsp, "error"), "desc");
1121     g_assert_cmpstr(error_desc, ==, "File descriptor named 'fd-mig' not found");
1122     qobject_unref(rsp);
1123
1124     /* Complete migration */
1125     wait_for_serial("dest_serial");
1126     wait_for_migration_complete(from);
1127     test_migrate_end(from, to, true);
1128 }
1129
1130 int main(int argc, char **argv)
1131 {
1132     char template[] = "/tmp/migration-test-XXXXXX";
1133     int ret;
1134
1135     g_test_init(&argc, &argv, NULL);
1136
1137     if (!ufd_version_check()) {
1138         return g_test_run();
1139     }
1140
1141     /*
1142      * On ppc64, the test only works with kvm-hv, but not with kvm-pr and TCG
1143      * is touchy due to race conditions on dirty bits (especially on PPC for
1144      * some reason)
1145      */
1146     if (g_str_equal(qtest_get_arch(), "ppc64") &&
1147         access("/sys/module/kvm_hv", F_OK)) {
1148         g_test_message("Skipping test: kvm_hv not available");
1149         return g_test_run();
1150     }
1151
1152     /*
1153      * Similar to ppc64, s390x seems to be touchy with TCG, so disable it
1154      * there until the problems are resolved
1155      */
1156     if (g_str_equal(qtest_get_arch(), "s390x")) {
1157 #if defined(HOST_S390X)
1158         if (access("/dev/kvm", R_OK | W_OK)) {
1159             g_test_message("Skipping test: kvm not available");
1160             return g_test_run();
1161         }
1162 #else
1163         g_test_message("Skipping test: Need s390x host to work properly");
1164         return g_test_run();
1165 #endif
1166     }
1167
1168     tmpfs = mkdtemp(template);
1169     if (!tmpfs) {
1170         g_test_message("mkdtemp on path (%s): %s", template, strerror(errno));
1171     }
1172     g_assert(tmpfs);
1173
1174     module_call_init(MODULE_INIT_QOM);
1175
1176     qtest_add_func("/migration/postcopy/unix", test_postcopy);
1177     qtest_add_func("/migration/postcopy/recovery", test_postcopy_recovery);
1178     qtest_add_func("/migration/deprecated", test_deprecated);
1179     qtest_add_func("/migration/bad_dest", test_baddest);
1180     qtest_add_func("/migration/precopy/unix", test_precopy_unix);
1181     qtest_add_func("/migration/precopy/tcp", test_precopy_tcp);
1182     /* qtest_add_func("/migration/ignore_shared", test_ignore_shared); */
1183     qtest_add_func("/migration/xbzrle/unix", test_xbzrle_unix);
1184     qtest_add_func("/migration/fd_proto", test_migrate_fd_proto);
1185
1186     ret = g_test_run();
1187
1188     g_assert_cmpint(ret, ==, 0);
1189
1190     ret = rmdir(tmpfs);
1191     if (ret != 0) {
1192         g_test_message("unable to rmdir: path (%s): %s",
1193                        tmpfs, strerror(errno));
1194     }
1195
1196     return ret;
1197 }