tests/migration-test.c

   1 /*
   2  * QTest testcase for migration
   3  *
   4  * Copyright (c) 2016-2018 Red Hat, Inc. and/or its affiliates
   5  *   based on the vhost-user-test.c that is:
   6  *      Copyright (c) 2014 Virtual Open Systems Sarl.
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   9  * See the COPYING file in the top-level directory.
  10  *
  11  */
  12
  13 #include "qemu/osdep.h"
  14
  15 #include "libqtest.h"
  16 #include "qapi/qmp/qdict.h"
  17 #include "qapi/qmp/qjson.h"
  18 #include "qemu/option.h"
  19 #include "qemu/range.h"
  20 #include "qemu/sockets.h"
  21 #include "chardev/char.h"
  22 #include "sysemu/sysemu.h"
  23 #include "qapi/qapi-visit-sockets.h"
  24 #include "qapi/qobject-input-visitor.h"
  25 #include "qapi/qobject-output-visitor.h"
  26
  27 #include "migration/migration-test.h"
  28
  29 /* TODO actually test the results and get rid of this */
  30 #define qtest_qmp_discard_response(...) qobject_unref(qtest_qmp(__VA_ARGS__))
  31
  32 unsigned start_address;
  33 unsigned end_address;
  34 bool got_stop;
  35 static bool uffd_feature_thread_id;
  36
  37 #if defined(__linux__)
  38 #include <sys/syscall.h>
  39 #include <sys/vfs.h>
  40 #endif
  41
  42 #if defined(__linux__) && defined(__NR_userfaultfd) && defined(CONFIG_EVENTFD)
  43 #include <sys/eventfd.h>
  44 #include <sys/ioctl.h>
  45 #include <linux/userfaultfd.h>
  46
  47 static bool ufd_version_check(void)
  48 {
  49     struct uffdio_api api_struct;
  50     uint64_t ioctl_mask;
  51
  52     int ufd = syscall(__NR_userfaultfd, O_CLOEXEC);
  53
  54     if (ufd == -1) {
  55         g_test_message("Skipping test: userfaultfd not available");
  56         return false;
  57     }
  58
  59     api_struct.api = UFFD_API;
  60     api_struct.features = 0;
  61     if (ioctl(ufd, UFFDIO_API, &api_struct)) {
  62         g_test_message("Skipping test: UFFDIO_API failed");
  63         return false;
  64     }
  65     uffd_feature_thread_id = api_struct.features & UFFD_FEATURE_THREAD_ID;
  66
  67     ioctl_mask = (__u64)1 << _UFFDIO_REGISTER |
  68                  (__u64)1 << _UFFDIO_UNREGISTER;
  69     if ((api_struct.ioctls & ioctl_mask) != ioctl_mask) {
  70         g_test_message("Skipping test: Missing userfault feature");
  71         return false;
  72     }
  73
  74     return true;
  75 }
  76
  77 #else
  78 static bool ufd_version_check(void)
  79 {
  80     g_test_message("Skipping test: Userfault not available (builtdtime)");
  81     return false;
  82 }
  83
  84 #endif
  85
  86 static const char *tmpfs;
  87
  88 /* The boot file modifies memory area in [start_address, end_address)
  89  * repeatedly. It outputs a 'B' at a fixed rate while it's still running.
  90  */
  91 #include "tests/migration/i386/a-b-bootblock.h"
  92 #include "tests/migration/aarch64/a-b-kernel.h"
  93
  94 static void init_bootfile(const char *bootpath, void *content)
  95 {
  96     FILE *bootfile = fopen(bootpath, "wb");
  97
  98     g_assert_cmpint(fwrite(content, 512, 1, bootfile), ==, 1);
  99     fclose(bootfile);
 100 }
 101
 102 #include "tests/migration/s390x/a-b-bios.h"
 103
 104 static void init_bootfile_s390x(const char *bootpath)
 105 {
 106     FILE *bootfile = fopen(bootpath, "wb");
 107     size_t len = sizeof(s390x_elf);
 108
 109     g_assert_cmpint(fwrite(s390x_elf, len, 1, bootfile), ==, 1);
 110     fclose(bootfile);
 111 }
 112
 113 /*
 114  * Wait for some output in the serial output file,
 115  * we get an 'A' followed by an endless string of 'B's
 116  * but on the destination we won't have the A.
 117  */
 118 static void wait_for_serial(const char *side)
 119 {
 120     char *serialpath = g_strdup_printf("%s/%s", tmpfs, side);
 121     FILE *serialfile = fopen(serialpath, "r");
 122     const char *arch = qtest_get_arch();
 123     int started = (strcmp(side, "src_serial") == 0 &&
 124                    strcmp(arch, "ppc64") == 0) ? 0 : 1;
 125
 126     g_free(serialpath);
 127     do {
 128         int readvalue = fgetc(serialfile);
 129
 130         if (!started) {
 131             /* SLOF prints its banner before starting test,
 132              * to ignore it, mark the start of the test with '_',
 133              * ignore all characters until this marker
 134              */
 135             switch (readvalue) {
 136             case '_':
 137                 started = 1;
 138                 break;
 139             case EOF:
 140                 fseek(serialfile, 0, SEEK_SET);
 141                 usleep(1000);
 142                 break;
 143             }
 144             continue;
 145         }
 146         switch (readvalue) {
 147         case 'A':
 148             /* Fine */
 149             break;
 150
 151         case 'B':
 152             /* It's alive! */
 153             fclose(serialfile);
 154             return;
 155
 156         case EOF:
 157             started = (strcmp(side, "src_serial") == 0 &&
 158                        strcmp(arch, "ppc64") == 0) ? 0 : 1;
 159             fseek(serialfile, 0, SEEK_SET);
 160             usleep(1000);
 161             break;
 162
 163         default:
 164             fprintf(stderr, "Unexpected %d on %s serial\n", readvalue, side);
 165             g_assert_not_reached();
 166         }
 167     } while (true);
 168 }
 169
 170 static void stop_cb(void *opaque, const char *name, QDict *data)
 171 {
 172     if (!strcmp(name, "STOP")) {
 173         got_stop = true;
 174     }
 175 }
 176
 177 /*
 178  * Events can get in the way of responses we are actually waiting for.
 179  */
 180 GCC_FMT_ATTR(2, 3)
 181 static QDict *wait_command(QTestState *who, const char *command, ...)
 182 {
 183     va_list ap;
 184
 185     va_start(ap, command);
 186     qtest_qmp_vsend(who, command, ap);
 187     va_end(ap);
 188
 189     return qtest_qmp_receive_success(who, stop_cb, NULL);
 190 }
 191
 192 /*
 193  * Note: caller is responsible to free the returned object via
 194  * qobject_unref() after use
 195  */
 196 static QDict *migrate_query(QTestState *who)
 197 {
 198     return wait_command(who, "{ 'execute': 'query-migrate' }");
 199 }
 200
 201 /*
 202  * Note: caller is responsible to free the returned object via
 203  * g_free() after use
 204  */
 205 static gchar *migrate_query_status(QTestState *who)
 206 {
 207     QDict *rsp_return = migrate_query(who);
 208     gchar *status = g_strdup(qdict_get_str(rsp_return, "status"));
 209
 210     g_assert(status);
 211     qobject_unref(rsp_return);
 212
 213     return status;
 214 }
 215
 216 /*
 217  * It's tricky to use qemu's migration event capability with qtest,
 218  * events suddenly appearing confuse the qmp()/hmp() responses.
 219  */
 220
 221 static int64_t read_ram_property_int(QTestState *who, const char *property)
 222 {
 223     QDict *rsp_return, *rsp_ram;
 224     int64_t result;
 225
 226     rsp_return = migrate_query(who);
 227     if (!qdict_haskey(rsp_return, "ram")) {
 228         /* Still in setup */
 229         result = 0;
 230     } else {
 231         rsp_ram = qdict_get_qdict(rsp_return, "ram");
 232         result = qdict_get_try_int(rsp_ram, property, 0);
 233     }
 234     qobject_unref(rsp_return);
 235     return result;
 236 }
 237
 238 static uint64_t get_migration_pass(QTestState *who)
 239 {
 240     return read_ram_property_int(who, "dirty-sync-count");
 241 }
 242
 243 static void read_blocktime(QTestState *who)
 244 {
 245     QDict *rsp_return;
 246
 247     rsp_return = migrate_query(who);
 248     g_assert(qdict_haskey(rsp_return, "postcopy-blocktime"));
 249     qobject_unref(rsp_return);
 250 }
 251
 252 static void wait_for_migration_status(QTestState *who,
 253                                       const char *goal)
 254 {
 255     while (true) {
 256         bool completed;
 257         char *status;
 258
 259         status = migrate_query_status(who);
 260         completed = strcmp(status, goal) == 0;
 261         g_assert_cmpstr(status, !=,  "failed");
 262         g_free(status);
 263         if (completed) {
 264             return;
 265         }
 266         usleep(1000);
 267     }
 268 }
 269
 270 static void wait_for_migration_complete(QTestState *who)
 271 {
 272     wait_for_migration_status(who, "completed");
 273 }
 274
 275 static void wait_for_migration_pass(QTestState *who)
 276 {
 277     uint64_t initial_pass = get_migration_pass(who);
 278     uint64_t pass;
 279
 280     /* Wait for the 1st sync */
 281     while (!got_stop && !initial_pass) {
 282         usleep(1000);
 283         initial_pass = get_migration_pass(who);
 284     }
 285
 286     do {
 287         usleep(1000);
 288         pass = get_migration_pass(who);
 289     } while (pass == initial_pass && !got_stop);
 290 }
 291
 292 static void check_guests_ram(QTestState *who)
 293 {
 294     /* Our ASM test will have been incrementing one byte from each page from
 295      * start_address to < end_address in order. This gives us a constraint
 296      * that any page's byte should be equal or less than the previous pages
 297      * byte (mod 256); and they should all be equal except for one transition
 298      * at the point where we meet the incrementer. (We're running this with
 299      * the guest stopped).
 300      */
 301     unsigned address;
 302     uint8_t first_byte;
 303     uint8_t last_byte;
 304     bool hit_edge = false;
 305     bool bad = false;
 306
 307     qtest_memread(who, start_address, &first_byte, 1);
 308     last_byte = first_byte;
 309
 310     for (address = start_address + TEST_MEM_PAGE_SIZE; address < end_address;
 311          address += TEST_MEM_PAGE_SIZE)
 312     {
 313         uint8_t b;
 314         qtest_memread(who, address, &b, 1);
 315         if (b != last_byte) {
 316             if (((b + 1) % 256) == last_byte && !hit_edge) {
 317                 /* This is OK, the guest stopped at the point of
 318                  * incrementing the previous page but didn't get
 319                  * to us yet.
 320                  */
 321                 hit_edge = true;
 322                 last_byte = b;
 323             } else {
 324                 fprintf(stderr, "Memory content inconsistency at %x"
 325                                 " first_byte = %x last_byte = %x current = %x"
 326                                 " hit_edge = %x\n",
 327                                 address, first_byte, last_byte, b, hit_edge);
 328                 bad = true;
 329             }
 330         }
 331     }
 332     g_assert_false(bad);
 333 }
 334
 335 static void cleanup(const char *filename)
 336 {
 337     char *path = g_strdup_printf("%s/%s", tmpfs, filename);
 338
 339     unlink(path);
 340     g_free(path);
 341 }
 342
 343 static char *get_shmem_opts(const char *mem_size, const char *shmem_path)
 344 {
 345     return g_strdup_printf("-object memory-backend-file,id=mem0,size=%s"
 346                            ",mem-path=%s,share=on -numa node,memdev=mem0",
 347                            mem_size, shmem_path);
 348 }
 349
 350 static char *SocketAddress_to_str(SocketAddress *addr)
 351 {
 352     switch (addr->type) {
 353     case SOCKET_ADDRESS_TYPE_INET:
 354         return g_strdup_printf("tcp:%s:%s",
 355                                addr->u.inet.host,
 356                                addr->u.inet.port);
 357     case SOCKET_ADDRESS_TYPE_UNIX:
 358         return g_strdup_printf("unix:%s",
 359                                addr->u.q_unix.path);
 360     case SOCKET_ADDRESS_TYPE_FD:
 361         return g_strdup_printf("fd:%s", addr->u.fd.str);
 362     case SOCKET_ADDRESS_TYPE_VSOCK:
 363         return g_strdup_printf("tcp:%s:%s",
 364                                addr->u.vsock.cid,
 365                                addr->u.vsock.port);
 366     default:
 367         return g_strdup("unknown address type");
 368     }
 369 }
 370
 371 static char *migrate_get_socket_address(QTestState *who, const char *parameter)
 372 {
 373     QDict *rsp;
 374     char *result;
 375     Error *local_err = NULL;
 376     SocketAddressList *addrs;
 377     Visitor *iv = NULL;
 378     QObject *object;
 379
 380     rsp = migrate_query(who);
 381     object = qdict_get(rsp, parameter);
 382
 383     iv = qobject_input_visitor_new(object);
 384     visit_type_SocketAddressList(iv, NULL, &addrs, &local_err);
 385
 386     /* we are only using a single address */
 387     result = g_strdup_printf("%s", SocketAddress_to_str(addrs->value));
 388
 389     qapi_free_SocketAddressList(addrs);
 390     qobject_unref(rsp);
 391     return result;
 392 }
 393
 394 static long long migrate_get_parameter(QTestState *who, const char *parameter)
 395 {
 396     QDict *rsp;
 397     long long result;
 398
 399     rsp = wait_command(who, "{ 'execute': 'query-migrate-parameters' }");
 400     result = qdict_get_int(rsp, parameter);
 401     qobject_unref(rsp);
 402     return result;
 403 }
 404
 405 static void migrate_check_parameter(QTestState *who, const char *parameter,
 406                                     long long value)
 407 {
 408     long long result;
 409
 410     result = migrate_get_parameter(who, parameter);
 411     g_assert_cmpint(result, ==, value);
 412 }
 413
 414 static void migrate_set_parameter(QTestState *who, const char *parameter,
 415                                   long long value)
 416 {
 417     QDict *rsp;
 418
 419     rsp = qtest_qmp(who,
 420                     "{ 'execute': 'migrate-set-parameters',"
 421                     "'arguments': { %s: %lld } }",
 422                     parameter, value);
 423     g_assert(qdict_haskey(rsp, "return"));
 424     qobject_unref(rsp);
 425     migrate_check_parameter(who, parameter, value);
 426 }
 427
 428 static void migrate_pause(QTestState *who)
 429 {
 430     QDict *rsp;
 431
 432     rsp = wait_command(who, "{ 'execute': 'migrate-pause' }");
 433     qobject_unref(rsp);
 434 }
 435
 436 static void migrate_recover(QTestState *who, const char *uri)
 437 {
 438     QDict *rsp;
 439
 440     rsp = wait_command(who,
 441                        "{ 'execute': 'migrate-recover', "
 442                        "  'id': 'recover-cmd', "
 443                        "  'arguments': { 'uri': %s } }",
 444                        uri);
 445     qobject_unref(rsp);
 446 }
 447
 448 static void migrate_set_capability(QTestState *who, const char *capability,
 449                                    bool value)
 450 {
 451     QDict *rsp;
 452
 453     rsp = qtest_qmp(who,
 454                     "{ 'execute': 'migrate-set-capabilities',"
 455                     "'arguments': { "
 456                     "'capabilities': [ { "
 457                     "'capability': %s, 'state': %i } ] } }",
 458                     capability, value);
 459     g_assert(qdict_haskey(rsp, "return"));
 460     qobject_unref(rsp);
 461 }
 462
 463 /*
 464  * Send QMP command "migrate".
 465  * Arguments are built from @fmt... (formatted like
 466  * qobject_from_jsonf_nofail()) with "uri": @uri spliced in.
 467  */
 468 GCC_FMT_ATTR(3, 4)
 469 static void migrate(QTestState *who, const char *uri, const char *fmt, ...)
 470 {
 471     va_list ap;
 472     QDict *args, *rsp;
 473
 474     va_start(ap, fmt);
 475     args = qdict_from_vjsonf_nofail(fmt, ap);
 476     va_end(ap);
 477
 478     g_assert(!qdict_haskey(args, "uri"));
 479     qdict_put_str(args, "uri", uri);
 480
 481     rsp = qmp("{ 'execute': 'migrate', 'arguments': %p}", args);
 482     g_assert(qdict_haskey(rsp, "return"));
 483     qobject_unref(rsp);
 484 }
 485
 486 static void migrate_postcopy_start(QTestState *from, QTestState *to)
 487 {
 488     QDict *rsp;
 489
 490     rsp = wait_command(from, "{ 'execute': 'migrate-start-postcopy' }");
 491     qobject_unref(rsp);
 492
 493     if (!got_stop) {
 494         qtest_qmp_eventwait(from, "STOP");
 495     }
 496
 497     qtest_qmp_eventwait(to, "RESUME");
 498 }
 499
 500 static int test_migrate_start(QTestState **from, QTestState **to,
 501                                const char *uri, bool hide_stderr,
 502                                bool use_shmem)
 503 {
 504     gchar *cmd_src, *cmd_dst;
 505     char *bootpath = NULL;
 506     char *extra_opts = NULL;
 507     char *shmem_path = NULL;
 508     const char *arch = qtest_get_arch();
 509     const char *accel = "kvm:tcg";
 510
 511     if (use_shmem) {
 512         if (!g_file_test("/dev/shm", G_FILE_TEST_IS_DIR)) {
 513             g_test_skip("/dev/shm is not supported");
 514             return -1;
 515         }
 516         shmem_path = g_strdup_printf("/dev/shm/qemu-%d", getpid());
 517     }
 518
 519     got_stop = false;
 520     bootpath = g_strdup_printf("%s/bootsect", tmpfs);
 521     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
 522         init_bootfile(bootpath, x86_bootsect);
 523         extra_opts = use_shmem ? get_shmem_opts("150M", shmem_path) : NULL;
 524         cmd_src = g_strdup_printf("-machine accel=%s -m 150M"
 525                                   " -name source,debug-threads=on"
 526                                   " -serial file:%s/src_serial"
 527                                   " -drive file=%s,format=raw %s",
 528                                   accel, tmpfs, bootpath,
 529                                   extra_opts ? extra_opts : "");
 530         cmd_dst = g_strdup_printf("-machine accel=%s -m 150M"
 531                                   " -name target,debug-threads=on"
 532                                   " -serial file:%s/dest_serial"
 533                                   " -drive file=%s,format=raw"
 534                                   " -incoming %s %s",
 535                                   accel, tmpfs, bootpath, uri,
 536                                   extra_opts ? extra_opts : "");
 537         start_address = X86_TEST_MEM_START;
 538         end_address = X86_TEST_MEM_END;
 539     } else if (g_str_equal(arch, "s390x")) {
 540         init_bootfile_s390x(bootpath);
 541         extra_opts = use_shmem ? get_shmem_opts("128M", shmem_path) : NULL;
 542         cmd_src = g_strdup_printf("-machine accel=%s -m 128M"
 543                                   " -name source,debug-threads=on"
 544                                   " -serial file:%s/src_serial -bios %s %s",
 545                                   accel, tmpfs, bootpath,
 546                                   extra_opts ? extra_opts : "");
 547         cmd_dst = g_strdup_printf("-machine accel=%s -m 128M"
 548                                   " -name target,debug-threads=on"
 549                                   " -serial file:%s/dest_serial -bios %s"
 550                                   " -incoming %s %s",
 551                                   accel, tmpfs, bootpath, uri,
 552                                   extra_opts ? extra_opts : "");
 553         start_address = S390_TEST_MEM_START;
 554         end_address = S390_TEST_MEM_END;
 555     } else if (strcmp(arch, "ppc64") == 0) {
 556         extra_opts = use_shmem ? get_shmem_opts("256M", shmem_path) : NULL;
 557         cmd_src = g_strdup_printf("-machine accel=%s -m 256M -nodefaults"
 558                                   " -name source,debug-threads=on"
 559                                   " -serial file:%s/src_serial"
 560                                   " -prom-env 'use-nvramrc?=true' -prom-env "
 561                                   "'nvramrc=hex .\" _\" begin %x %x "
 562                                   "do i c@ 1 + i c! 1000 +loop .\" B\" 0 "
 563                                   "until' %s",  accel, tmpfs, end_address,
 564                                   start_address, extra_opts ? extra_opts : "");
 565         cmd_dst = g_strdup_printf("-machine accel=%s -m 256M"
 566                                   " -name target,debug-threads=on"
 567                                   " -serial file:%s/dest_serial"
 568                                   " -incoming %s %s",
 569                                   accel, tmpfs, uri,
 570                                   extra_opts ? extra_opts : "");
 571
 572         start_address = PPC_TEST_MEM_START;
 573         end_address = PPC_TEST_MEM_END;
 574     } else if (strcmp(arch, "aarch64") == 0) {
 575         init_bootfile(bootpath, aarch64_kernel);
 576         extra_opts = use_shmem ? get_shmem_opts("150M", shmem_path) : NULL;
 577         cmd_src = g_strdup_printf("-machine virt,accel=%s,gic-version=max "
 578                                   "-name vmsource,debug-threads=on -cpu max "
 579                                   "-m 150M -serial file:%s/src_serial "
 580                                   "-kernel %s %s",
 581                                   accel, tmpfs, bootpath,
 582                                   extra_opts ? extra_opts : "");
 583         cmd_dst = g_strdup_printf("-machine virt,accel=%s,gic-version=max "
 584                                   "-name vmdest,debug-threads=on -cpu max "
 585                                   "-m 150M -serial file:%s/dest_serial "
 586                                   "-kernel %s "
 587                                   "-incoming %s %s",
 588                                   accel, tmpfs, bootpath, uri,
 589                                   extra_opts ? extra_opts : "");
 590
 591         start_address = ARM_TEST_MEM_START;
 592         end_address = ARM_TEST_MEM_END;
 593
 594         g_assert(sizeof(aarch64_kernel) <= ARM_TEST_MAX_KERNEL_SIZE);
 595     } else {
 596         g_assert_not_reached();
 597     }
 598
 599     g_free(bootpath);
 600     g_free(extra_opts);
 601
 602     if (hide_stderr) {
 603         gchar *tmp;
 604         tmp = g_strdup_printf("%s 2>/dev/null", cmd_src);
 605         g_free(cmd_src);
 606         cmd_src = tmp;
 607
 608         tmp = g_strdup_printf("%s 2>/dev/null", cmd_dst);
 609         g_free(cmd_dst);
 610         cmd_dst = tmp;
 611     }
 612
 613     *from = qtest_start(cmd_src);
 614     g_free(cmd_src);
 615
 616     *to = qtest_init(cmd_dst);
 617     g_free(cmd_dst);
 618
 619     /*
 620      * Remove shmem file immediately to avoid memory leak in test failed case.
 621      * It's valid becase QEMU has already opened this file
 622      */
 623     if (use_shmem) {
 624         unlink(shmem_path);
 625         g_free(shmem_path);
 626     }
 627
 628     return 0;
 629 }
 630
 631 static void test_migrate_end(QTestState *from, QTestState *to, bool test_dest)
 632 {
 633     unsigned char dest_byte_a, dest_byte_b, dest_byte_c, dest_byte_d;
 634
 635     qtest_quit(from);
 636
 637     if (test_dest) {
 638         qtest_memread(to, start_address, &dest_byte_a, 1);
 639
 640         /* Destination still running, wait for a byte to change */
 641         do {
 642             qtest_memread(to, start_address, &dest_byte_b, 1);
 643             usleep(1000 * 10);
 644         } while (dest_byte_a == dest_byte_b);
 645
 646         qtest_qmp_discard_response(to, "{ 'execute' : 'stop'}");
 647
 648         /* With it stopped, check nothing changes */
 649         qtest_memread(to, start_address, &dest_byte_c, 1);
 650         usleep(1000 * 200);
 651         qtest_memread(to, start_address, &dest_byte_d, 1);
 652         g_assert_cmpint(dest_byte_c, ==, dest_byte_d);
 653
 654         check_guests_ram(to);
 655     }
 656
 657     qtest_quit(to);
 658
 659     cleanup("bootsect");
 660     cleanup("migsocket");
 661     cleanup("src_serial");
 662     cleanup("dest_serial");
 663 }
 664
 665 static void deprecated_set_downtime(QTestState *who, const double value)
 666 {
 667     QDict *rsp;
 668
 669     rsp = qtest_qmp(who,
 670                     "{ 'execute': 'migrate_set_downtime',"
 671                     " 'arguments': { 'value': %f } }", value);
 672     g_assert(qdict_haskey(rsp, "return"));
 673     qobject_unref(rsp);
 674     migrate_check_parameter(who, "downtime-limit", value * 1000);
 675 }
 676
 677 static void deprecated_set_speed(QTestState *who, long long value)
 678 {
 679     QDict *rsp;
 680
 681     rsp = qtest_qmp(who, "{ 'execute': 'migrate_set_speed',"
 682                           "'arguments': { 'value': %lld } }", value);
 683     g_assert(qdict_haskey(rsp, "return"));
 684     qobject_unref(rsp);
 685     migrate_check_parameter(who, "max-bandwidth", value);
 686 }
 687
 688 static void deprecated_set_cache_size(QTestState *who, long long value)
 689 {
 690     QDict *rsp;
 691
 692     rsp = qtest_qmp(who, "{ 'execute': 'migrate-set-cache-size',"
 693                          "'arguments': { 'value': %lld } }", value);
 694     g_assert(qdict_haskey(rsp, "return"));
 695     qobject_unref(rsp);
 696     migrate_check_parameter(who, "xbzrle-cache-size", value);
 697 }
 698
 699 static void test_deprecated(void)
 700 {
 701     QTestState *from;
 702
 703     from = qtest_start("-machine none");
 704
 705     deprecated_set_downtime(from, 0.12345);
 706     deprecated_set_speed(from, 12345);
 707     deprecated_set_cache_size(from, 4096);
 708
 709     qtest_quit(from);
 710 }
 711
 712 static int migrate_postcopy_prepare(QTestState **from_ptr,
 713                                      QTestState **to_ptr,
 714                                      bool hide_error)
 715 {
 716     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 717     QTestState *from, *to;
 718
 719     if (test_migrate_start(&from, &to, uri, hide_error, false)) {
 720         return -1;
 721     }
 722
 723     migrate_set_capability(from, "postcopy-ram", true);
 724     migrate_set_capability(to, "postcopy-ram", true);
 725     migrate_set_capability(to, "postcopy-blocktime", true);
 726
 727     /* We want to pick a speed slow enough that the test completes
 728      * quickly, but that it doesn't complete precopy even on a slow
 729      * machine, so also set the downtime.
 730      */
 731     migrate_set_parameter(from, "max-bandwidth", 100000000);
 732     migrate_set_parameter(from, "downtime-limit", 1);
 733
 734     /* Wait for the first serial output from the source */
 735     wait_for_serial("src_serial");
 736
 737     migrate(from, uri, "{}");
 738     g_free(uri);
 739
 740     wait_for_migration_pass(from);
 741
 742     *from_ptr = from;
 743     *to_ptr = to;
 744
 745     return 0;
 746 }
 747
 748 static void migrate_postcopy_complete(QTestState *from, QTestState *to)
 749 {
 750     wait_for_migration_complete(from);
 751
 752     /* Make sure we get at least one "B" on destination */
 753     wait_for_serial("dest_serial");
 754
 755     if (uffd_feature_thread_id) {
 756         read_blocktime(to);
 757     }
 758
 759     test_migrate_end(from, to, true);
 760 }
 761
 762 static void test_postcopy(void)
 763 {
 764     QTestState *from, *to;
 765
 766     if (migrate_postcopy_prepare(&from, &to, false)) {
 767         return;
 768     }
 769     migrate_postcopy_start(from, to);
 770     migrate_postcopy_complete(from, to);
 771 }
 772
 773 static void test_postcopy_recovery(void)
 774 {
 775     QTestState *from, *to;
 776     char *uri;
 777
 778     if (migrate_postcopy_prepare(&from, &to, true)) {
 779         return;
 780     }
 781
 782     /* Turn postcopy speed down, 4K/s is slow enough on any machines */
 783     migrate_set_parameter(from, "max-postcopy-bandwidth", 4096);
 784
 785     /* Now we start the postcopy */
 786     migrate_postcopy_start(from, to);
 787
 788     /*
 789      * Wait until postcopy is really started; we can only run the
 790      * migrate-pause command during a postcopy
 791      */
 792     wait_for_migration_status(from, "postcopy-active");
 793
 794     /*
 795      * Manually stop the postcopy migration. This emulates a network
 796      * failure with the migration socket
 797      */
 798     migrate_pause(from);
 799
 800     /*
 801      * Wait for destination side to reach postcopy-paused state.  The
 802      * migrate-recover command can only succeed if destination machine
 803      * is in the paused state
 804      */
 805     wait_for_migration_status(to, "postcopy-paused");
 806
 807     /*
 808      * Create a new socket to emulate a new channel that is different
 809      * from the broken migration channel; tell the destination to
 810      * listen to the new port
 811      */
 812     uri = g_strdup_printf("unix:%s/migsocket-recover", tmpfs);
 813     migrate_recover(to, uri);
 814
 815     /*
 816      * Try to rebuild the migration channel using the resume flag and
 817      * the newly created channel
 818      */
 819     wait_for_migration_status(from, "postcopy-paused");
 820     migrate(from, uri, "{'resume': true}");
 821     g_free(uri);
 822
 823     /* Restore the postcopy bandwidth to unlimited */
 824     migrate_set_parameter(from, "max-postcopy-bandwidth", 0);
 825
 826     migrate_postcopy_complete(from, to);
 827 }
 828
 829 static void test_baddest(void)
 830 {
 831     QTestState *from, *to;
 832     QDict *rsp_return;
 833     char *status;
 834     bool failed;
 835
 836     if (test_migrate_start(&from, &to, "tcp:0:0", true, false)) {
 837         return;
 838     }
 839     migrate(from, "tcp:0:0", "{}");
 840     do {
 841         status = migrate_query_status(from);
 842         g_assert(!strcmp(status, "setup") || !(strcmp(status, "failed")));
 843         failed = !strcmp(status, "failed");
 844         g_free(status);
 845     } while (!failed);
 846
 847     /* Is the machine currently running? */
 848     rsp_return = wait_command(from, "{ 'execute': 'query-status' }");
 849     g_assert(qdict_haskey(rsp_return, "running"));
 850     g_assert(qdict_get_bool(rsp_return, "running"));
 851     qobject_unref(rsp_return);
 852
 853     test_migrate_end(from, to, false);
 854 }
 855
 856 static void test_precopy_unix(void)
 857 {
 858     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 859     QTestState *from, *to;
 860
 861     if (test_migrate_start(&from, &to, uri, false, false)) {
 862         return;
 863     }
 864
 865     /* We want to pick a speed slow enough that the test completes
 866      * quickly, but that it doesn't complete precopy even on a slow
 867      * machine, so also set the downtime.
 868      */
 869     /* 1 ms should make it not converge*/
 870     migrate_set_parameter(from, "downtime-limit", 1);
 871     /* 1GB/s */
 872     migrate_set_parameter(from, "max-bandwidth", 1000000000);
 873
 874     /* Wait for the first serial output from the source */
 875     wait_for_serial("src_serial");
 876
 877     migrate(from, uri, "{}");
 878
 879     wait_for_migration_pass(from);
 880
 881     /* 300 ms should converge */
 882     migrate_set_parameter(from, "downtime-limit", 300);
 883
 884     if (!got_stop) {
 885         qtest_qmp_eventwait(from, "STOP");
 886     }
 887
 888     qtest_qmp_eventwait(to, "RESUME");
 889
 890     wait_for_serial("dest_serial");
 891     wait_for_migration_complete(from);
 892
 893     test_migrate_end(from, to, true);
 894     g_free(uri);
 895 }
 896
 897 #if 0
 898 /* Currently upset on aarch64 TCG */
 899 static void test_ignore_shared(void)
 900 {
 901     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 902     QTestState *from, *to;
 903
 904     if (test_migrate_start(&from, &to, uri, false, true)) {
 905         return;
 906     }
 907
 908     migrate_set_capability(from, "x-ignore-shared", true);
 909     migrate_set_capability(to, "x-ignore-shared", true);
 910
 911     /* Wait for the first serial output from the source */
 912     wait_for_serial("src_serial");
 913
 914     migrate(from, uri, "{}");
 915
 916     wait_for_migration_pass(from);
 917
 918     if (!got_stop) {
 919         qtest_qmp_eventwait(from, "STOP");
 920     }
 921
 922     qtest_qmp_eventwait(to, "RESUME");
 923
 924     wait_for_serial("dest_serial");
 925     wait_for_migration_complete(from);
 926
 927     /* Check whether shared RAM has been really skipped */
 928     g_assert_cmpint(read_ram_property_int(from, "transferred"), <, 1024 * 1024);
 929
 930     test_migrate_end(from, to, true);
 931     g_free(uri);
 932 }
 933 #endif
 934
 935 static void test_xbzrle(const char *uri)
 936 {
 937     QTestState *from, *to;
 938
 939     if (test_migrate_start(&from, &to, uri, false, false)) {
 940         return;
 941     }
 942
 943     /*
 944      * We want to pick a speed slow enough that the test completes
 945      * quickly, but that it doesn't complete precopy even on a slow
 946      * machine, so also set the downtime.
 947      */
 948     /* 1 ms should make it not converge*/
 949     migrate_set_parameter(from, "downtime-limit", 1);
 950     /* 1GB/s */
 951     migrate_set_parameter(from, "max-bandwidth", 1000000000);
 952
 953     migrate_set_parameter(from, "xbzrle-cache-size", 33554432);
 954
 955     migrate_set_capability(from, "xbzrle", "true");
 956     migrate_set_capability(to, "xbzrle", "true");
 957     /* Wait for the first serial output from the source */
 958     wait_for_serial("src_serial");
 959
 960     migrate(from, uri, "{}");
 961
 962     wait_for_migration_pass(from);
 963
 964     /* 300ms should converge */
 965     migrate_set_parameter(from, "downtime-limit", 300);
 966
 967     if (!got_stop) {
 968         qtest_qmp_eventwait(from, "STOP");
 969     }
 970     qtest_qmp_eventwait(to, "RESUME");
 971
 972     wait_for_serial("dest_serial");
 973     wait_for_migration_complete(from);
 974
 975     test_migrate_end(from, to, true);
 976 }
 977
 978 static void test_xbzrle_unix(void)
 979 {
 980     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 981
 982     test_xbzrle(uri);
 983     g_free(uri);
 984 }
 985
 986 static void test_precopy_tcp(void)
 987 {
 988     char *uri;
 989     QTestState *from, *to;
 990
 991     if (test_migrate_start(&from, &to, "tcp:127.0.0.1:0", false, false)) {
 992         return;
 993     }
 994
 995     /*
 996      * We want to pick a speed slow enough that the test completes
 997      * quickly, but that it doesn't complete precopy even on a slow
 998      * machine, so also set the downtime.
 999      */
1000     /* 1 ms should make it not converge*/
1001     migrate_set_parameter(from, "downtime-limit", 1);
1002     /* 1GB/s */
1003     migrate_set_parameter(from, "max-bandwidth", 1000000000);
1004
1005     /* Wait for the first serial output from the source */
1006     wait_for_serial("src_serial");
1007
1008     uri = migrate_get_socket_address(to, "socket-address");
1009
1010     migrate(from, uri, "{}");
1011
1012     wait_for_migration_pass(from);
1013
1014     /* 300ms should converge */
1015     migrate_set_parameter(from, "downtime-limit", 300);
1016
1017     if (!got_stop) {
1018         qtest_qmp_eventwait(from, "STOP");
1019     }
1020     qtest_qmp_eventwait(to, "RESUME");
1021
1022     wait_for_serial("dest_serial");
1023     wait_for_migration_complete(from);
1024
1025     test_migrate_end(from, to, true);
1026     g_free(uri);
1027 }
1028
1029 int main(int argc, char **argv)
1030 {
1031     char template[] = "/tmp/migration-test-XXXXXX";
1032     int ret;
1033
1034     g_test_init(&argc, &argv, NULL);
1035
1036     if (!ufd_version_check()) {
1037         return g_test_run();
1038     }
1039
1040     /*
1041      * On ppc64, the test only works with kvm-hv, but not with kvm-pr and TCG
1042      * is touchy due to race conditions on dirty bits (especially on PPC for
1043      * some reason)
1044      */
1045     if (g_str_equal(qtest_get_arch(), "ppc64") &&
1046         access("/sys/module/kvm_hv", F_OK)) {
1047         g_test_message("Skipping test: kvm_hv not available");
1048         return g_test_run();
1049     }
1050
1051     /*
1052      * Similar to ppc64, s390x seems to be touchy with TCG, so disable it
1053      * there until the problems are resolved
1054      */
1055     if (g_str_equal(qtest_get_arch(), "s390x")) {
1056 #if defined(HOST_S390X)
1057         if (access("/dev/kvm", R_OK | W_OK)) {
1058             g_test_message("Skipping test: kvm not available");
1059             return g_test_run();
1060         }
1061 #else
1062         g_test_message("Skipping test: Need s390x host to work properly");
1063         return g_test_run();
1064 #endif
1065     }
1066
1067     tmpfs = mkdtemp(template);
1068     if (!tmpfs) {
1069         g_test_message("mkdtemp on path (%s): %s", template, strerror(errno));
1070     }
1071     g_assert(tmpfs);
1072
1073     module_call_init(MODULE_INIT_QOM);
1074
1075     qtest_add_func("/migration/postcopy/unix", test_postcopy);
1076     qtest_add_func("/migration/postcopy/recovery", test_postcopy_recovery);
1077     qtest_add_func("/migration/deprecated", test_deprecated);
1078     qtest_add_func("/migration/bad_dest", test_baddest);
1079     qtest_add_func("/migration/precopy/unix", test_precopy_unix);
1080     qtest_add_func("/migration/precopy/tcp", test_precopy_tcp);
1081     /* qtest_add_func("/migration/ignore_shared", test_ignore_shared); */
1082     qtest_add_func("/migration/xbzrle/unix", test_xbzrle_unix);
1083
1084     ret = g_test_run();
1085
1086     g_assert_cmpint(ret, ==, 0);
1087
1088     ret = rmdir(tmpfs);
1089     if (ret != 0) {
1090         g_test_message("unable to rmdir: path (%s): %s",
1091                        tmpfs, strerror(errno));
1092     }
1093
1094     return ret;
1095 }