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
  95 static void init_bootfile(const char *bootpath, void *content)
  96 {
  97     FILE *bootfile = fopen(bootpath, "wb");
  98
  99     g_assert_cmpint(fwrite(content, 512, 1, bootfile), ==, 1);
 100     fclose(bootfile);
 101 }
 102
 103 #include "tests/migration/s390x/a-b-bios.h"
 104
 105 static void init_bootfile_s390x(const char *bootpath)
 106 {
 107     FILE *bootfile = fopen(bootpath, "wb");
 108     size_t len = sizeof(s390x_elf);
 109
 110     g_assert_cmpint(fwrite(s390x_elf, len, 1, bootfile), ==, 1);
 111     fclose(bootfile);
 112 }
 113
 114 /*
 115  * Wait for some output in the serial output file,
 116  * we get an 'A' followed by an endless string of 'B's
 117  * but on the destination we won't have the A.
 118  */
 119 static void wait_for_serial(const char *side)
 120 {
 121     char *serialpath = g_strdup_printf("%s/%s", tmpfs, side);
 122     FILE *serialfile = fopen(serialpath, "r");
 123     const char *arch = qtest_get_arch();
 124     int started = (strcmp(side, "src_serial") == 0 &&
 125                    strcmp(arch, "ppc64") == 0) ? 0 : 1;
 126
 127     g_free(serialpath);
 128     do {
 129         int readvalue = fgetc(serialfile);
 130
 131         if (!started) {
 132             /* SLOF prints its banner before starting test,
 133              * to ignore it, mark the start of the test with '_',
 134              * ignore all characters until this marker
 135              */
 136             switch (readvalue) {
 137             case '_':
 138                 started = 1;
 139                 break;
 140             case EOF:
 141                 fseek(serialfile, 0, SEEK_SET);
 142                 usleep(1000);
 143                 break;
 144             }
 145             continue;
 146         }
 147         switch (readvalue) {
 148         case 'A':
 149             /* Fine */
 150             break;
 151
 152         case 'B':
 153             /* It's alive! */
 154             fclose(serialfile);
 155             return;
 156
 157         case EOF:
 158             started = (strcmp(side, "src_serial") == 0 &&
 159                        strcmp(arch, "ppc64") == 0) ? 0 : 1;
 160             fseek(serialfile, 0, SEEK_SET);
 161             usleep(1000);
 162             break;
 163
 164         default:
 165             fprintf(stderr, "Unexpected %d on %s serial\n", readvalue, side);
 166             g_assert_not_reached();
 167         }
 168     } while (true);
 169 }
 170
 171 static void stop_cb(void *opaque, const char *name, QDict *data)
 172 {
 173     if (!strcmp(name, "STOP")) {
 174         got_stop = true;
 175     }
 176 }
 177
 178 /*
 179  * Events can get in the way of responses we are actually waiting for.
 180  */
 181 GCC_FMT_ATTR(3, 4)
 182 static QDict *wait_command_fd(QTestState *who, int fd, const char *command, ...)
 183 {
 184     va_list ap;
 185
 186     va_start(ap, command);
 187     qtest_qmp_vsend_fds(who, &fd, 1, command, ap);
 188     va_end(ap);
 189
 190     return qtest_qmp_receive_success(who, stop_cb, NULL);
 191 }
 192
 193 /*
 194  * Events can get in the way of responses we are actually waiting for.
 195  */
 196 GCC_FMT_ATTR(2, 3)
 197 static QDict *wait_command(QTestState *who, const char *command, ...)
 198 {
 199     va_list ap;
 200
 201     va_start(ap, command);
 202     qtest_qmp_vsend(who, command, ap);
 203     va_end(ap);
 204
 205     return qtest_qmp_receive_success(who, stop_cb, NULL);
 206 }
 207
 208 /*
 209  * Note: caller is responsible to free the returned object via
 210  * qobject_unref() after use
 211  */
 212 static QDict *migrate_query(QTestState *who)
 213 {
 214     return wait_command(who, "{ 'execute': 'query-migrate' }");
 215 }
 216
 217 /*
 218  * Note: caller is responsible to free the returned object via
 219  * g_free() after use
 220  */
 221 static gchar *migrate_query_status(QTestState *who)
 222 {
 223     QDict *rsp_return = migrate_query(who);
 224     gchar *status = g_strdup(qdict_get_str(rsp_return, "status"));
 225
 226     g_assert(status);
 227     qobject_unref(rsp_return);
 228
 229     return status;
 230 }
 231
 232 /*
 233  * It's tricky to use qemu's migration event capability with qtest,
 234  * events suddenly appearing confuse the qmp()/hmp() responses.
 235  */
 236
 237 static int64_t read_ram_property_int(QTestState *who, const char *property)
 238 {
 239     QDict *rsp_return, *rsp_ram;
 240     int64_t result;
 241
 242     rsp_return = migrate_query(who);
 243     if (!qdict_haskey(rsp_return, "ram")) {
 244         /* Still in setup */
 245         result = 0;
 246     } else {
 247         rsp_ram = qdict_get_qdict(rsp_return, "ram");
 248         result = qdict_get_try_int(rsp_ram, property, 0);
 249     }
 250     qobject_unref(rsp_return);
 251     return result;
 252 }
 253
 254 static uint64_t get_migration_pass(QTestState *who)
 255 {
 256     return read_ram_property_int(who, "dirty-sync-count");
 257 }
 258
 259 static void read_blocktime(QTestState *who)
 260 {
 261     QDict *rsp_return;
 262
 263     rsp_return = migrate_query(who);
 264     g_assert(qdict_haskey(rsp_return, "postcopy-blocktime"));
 265     qobject_unref(rsp_return);
 266 }
 267
 268 static void wait_for_migration_status(QTestState *who,
 269                                       const char *goal)
 270 {
 271     while (true) {
 272         bool completed;
 273         char *status;
 274
 275         status = migrate_query_status(who);
 276         completed = strcmp(status, goal) == 0;
 277         g_assert_cmpstr(status, !=,  "failed");
 278         g_free(status);
 279         if (completed) {
 280             return;
 281         }
 282         usleep(1000);
 283     }
 284 }
 285
 286 static void wait_for_migration_complete(QTestState *who)
 287 {
 288     wait_for_migration_status(who, "completed");
 289 }
 290
 291 static void wait_for_migration_pass(QTestState *who)
 292 {
 293     uint64_t initial_pass = get_migration_pass(who);
 294     uint64_t pass;
 295
 296     /* Wait for the 1st sync */
 297     while (!got_stop && !initial_pass) {
 298         usleep(1000);
 299         initial_pass = get_migration_pass(who);
 300     }
 301
 302     do {
 303         usleep(1000);
 304         pass = get_migration_pass(who);
 305     } while (pass == initial_pass && !got_stop);
 306 }
 307
 308 static void check_guests_ram(QTestState *who)
 309 {
 310     /* Our ASM test will have been incrementing one byte from each page from
 311      * start_address to < end_address in order. This gives us a constraint
 312      * that any page's byte should be equal or less than the previous pages
 313      * byte (mod 256); and they should all be equal except for one transition
 314      * at the point where we meet the incrementer. (We're running this with
 315      * the guest stopped).
 316      */
 317     unsigned address;
 318     uint8_t first_byte;
 319     uint8_t last_byte;
 320     bool hit_edge = false;
 321     bool bad = false;
 322
 323     qtest_memread(who, start_address, &first_byte, 1);
 324     last_byte = first_byte;
 325
 326     for (address = start_address + TEST_MEM_PAGE_SIZE; address < end_address;
 327          address += TEST_MEM_PAGE_SIZE)
 328     {
 329         uint8_t b;
 330         qtest_memread(who, address, &b, 1);
 331         if (b != last_byte) {
 332             if (((b + 1) % 256) == last_byte && !hit_edge) {
 333                 /* This is OK, the guest stopped at the point of
 334                  * incrementing the previous page but didn't get
 335                  * to us yet.
 336                  */
 337                 hit_edge = true;
 338                 last_byte = b;
 339             } else {
 340                 fprintf(stderr, "Memory content inconsistency at %x"
 341                                 " first_byte = %x last_byte = %x current = %x"
 342                                 " hit_edge = %x\n",
 343                                 address, first_byte, last_byte, b, hit_edge);
 344                 bad = true;
 345             }
 346         }
 347     }
 348     g_assert_false(bad);
 349 }
 350
 351 static void cleanup(const char *filename)
 352 {
 353     char *path = g_strdup_printf("%s/%s", tmpfs, filename);
 354
 355     unlink(path);
 356     g_free(path);
 357 }
 358
 359 static char *get_shmem_opts(const char *mem_size, const char *shmem_path)
 360 {
 361     return g_strdup_printf("-object memory-backend-file,id=mem0,size=%s"
 362                            ",mem-path=%s,share=on -numa node,memdev=mem0",
 363                            mem_size, shmem_path);
 364 }
 365
 366 static char *SocketAddress_to_str(SocketAddress *addr)
 367 {
 368     switch (addr->type) {
 369     case SOCKET_ADDRESS_TYPE_INET:
 370         return g_strdup_printf("tcp:%s:%s",
 371                                addr->u.inet.host,
 372                                addr->u.inet.port);
 373     case SOCKET_ADDRESS_TYPE_UNIX:
 374         return g_strdup_printf("unix:%s",
 375                                addr->u.q_unix.path);
 376     case SOCKET_ADDRESS_TYPE_FD:
 377         return g_strdup_printf("fd:%s", addr->u.fd.str);
 378     case SOCKET_ADDRESS_TYPE_VSOCK:
 379         return g_strdup_printf("tcp:%s:%s",
 380                                addr->u.vsock.cid,
 381                                addr->u.vsock.port);
 382     default:
 383         return g_strdup("unknown address type");
 384     }
 385 }
 386
 387 static char *migrate_get_socket_address(QTestState *who, const char *parameter)
 388 {
 389     QDict *rsp;
 390     char *result;
 391     Error *local_err = NULL;
 392     SocketAddressList *addrs;
 393     Visitor *iv = NULL;
 394     QObject *object;
 395
 396     rsp = migrate_query(who);
 397     object = qdict_get(rsp, parameter);
 398
 399     iv = qobject_input_visitor_new(object);
 400     visit_type_SocketAddressList(iv, NULL, &addrs, &local_err);
 401     visit_free(iv);
 402
 403     /* we are only using a single address */
 404     result = SocketAddress_to_str(addrs->value);
 405
 406     qapi_free_SocketAddressList(addrs);
 407     qobject_unref(rsp);
 408     return result;
 409 }
 410
 411 static long long migrate_get_parameter(QTestState *who, const char *parameter)
 412 {
 413     QDict *rsp;
 414     long long result;
 415
 416     rsp = wait_command(who, "{ 'execute': 'query-migrate-parameters' }");
 417     result = qdict_get_int(rsp, parameter);
 418     qobject_unref(rsp);
 419     return result;
 420 }
 421
 422 static void migrate_check_parameter(QTestState *who, const char *parameter,
 423                                     long long value)
 424 {
 425     long long result;
 426
 427     result = migrate_get_parameter(who, parameter);
 428     g_assert_cmpint(result, ==, value);
 429 }
 430
 431 static void migrate_set_parameter(QTestState *who, const char *parameter,
 432                                   long long value)
 433 {
 434     QDict *rsp;
 435
 436     rsp = qtest_qmp(who,
 437                     "{ 'execute': 'migrate-set-parameters',"
 438                     "'arguments': { %s: %lld } }",
 439                     parameter, value);
 440     g_assert(qdict_haskey(rsp, "return"));
 441     qobject_unref(rsp);
 442     migrate_check_parameter(who, parameter, value);
 443 }
 444
 445 static void migrate_pause(QTestState *who)
 446 {
 447     QDict *rsp;
 448
 449     rsp = wait_command(who, "{ 'execute': 'migrate-pause' }");
 450     qobject_unref(rsp);
 451 }
 452
 453 static void migrate_recover(QTestState *who, const char *uri)
 454 {
 455     QDict *rsp;
 456
 457     rsp = wait_command(who,
 458                        "{ 'execute': 'migrate-recover', "
 459                        "  'id': 'recover-cmd', "
 460                        "  'arguments': { 'uri': %s } }",
 461                        uri);
 462     qobject_unref(rsp);
 463 }
 464
 465 static void migrate_set_capability(QTestState *who, const char *capability,
 466                                    bool value)
 467 {
 468     QDict *rsp;
 469
 470     rsp = qtest_qmp(who,
 471                     "{ 'execute': 'migrate-set-capabilities',"
 472                     "'arguments': { "
 473                     "'capabilities': [ { "
 474                     "'capability': %s, 'state': %i } ] } }",
 475                     capability, value);
 476     g_assert(qdict_haskey(rsp, "return"));
 477     qobject_unref(rsp);
 478 }
 479
 480 /*
 481  * Send QMP command "migrate".
 482  * Arguments are built from @fmt... (formatted like
 483  * qobject_from_jsonf_nofail()) with "uri": @uri spliced in.
 484  */
 485 GCC_FMT_ATTR(3, 4)
 486 static void migrate(QTestState *who, const char *uri, const char *fmt, ...)
 487 {
 488     va_list ap;
 489     QDict *args, *rsp;
 490
 491     va_start(ap, fmt);
 492     args = qdict_from_vjsonf_nofail(fmt, ap);
 493     va_end(ap);
 494
 495     g_assert(!qdict_haskey(args, "uri"));
 496     qdict_put_str(args, "uri", uri);
 497
 498     rsp = qmp("{ 'execute': 'migrate', 'arguments': %p}", args);
 499
 500     g_assert(qdict_haskey(rsp, "return"));
 501     qobject_unref(rsp);
 502 }
 503
 504 static void migrate_postcopy_start(QTestState *from, QTestState *to)
 505 {
 506     QDict *rsp;
 507
 508     rsp = wait_command(from, "{ 'execute': 'migrate-start-postcopy' }");
 509     qobject_unref(rsp);
 510
 511     if (!got_stop) {
 512         qtest_qmp_eventwait(from, "STOP");
 513     }
 514
 515     qtest_qmp_eventwait(to, "RESUME");
 516 }
 517
 518 static int test_migrate_start(QTestState **from, QTestState **to,
 519                                const char *uri, bool hide_stderr,
 520                                bool use_shmem)
 521 {
 522     gchar *cmd_src, *cmd_dst;
 523     char *bootpath = NULL;
 524     char *extra_opts = NULL;
 525     char *shmem_path = NULL;
 526     const char *arch = qtest_get_arch();
 527     const char *accel = "kvm:tcg";
 528
 529     if (use_shmem) {
 530         if (!g_file_test("/dev/shm", G_FILE_TEST_IS_DIR)) {
 531             g_test_skip("/dev/shm is not supported");
 532             return -1;
 533         }
 534         shmem_path = g_strdup_printf("/dev/shm/qemu-%d", getpid());
 535     }
 536
 537     got_stop = false;
 538     bootpath = g_strdup_printf("%s/bootsect", tmpfs);
 539     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
 540         init_bootfile(bootpath, x86_bootsect);
 541         extra_opts = use_shmem ? get_shmem_opts("150M", shmem_path) : NULL;
 542         cmd_src = g_strdup_printf("-machine accel=%s -m 150M"
 543                                   " -name source,debug-threads=on"
 544                                   " -serial file:%s/src_serial"
 545                                   " -drive file=%s,format=raw %s",
 546                                   accel, tmpfs, bootpath,
 547                                   extra_opts ? extra_opts : "");
 548         cmd_dst = g_strdup_printf("-machine accel=%s -m 150M"
 549                                   " -name target,debug-threads=on"
 550                                   " -serial file:%s/dest_serial"
 551                                   " -drive file=%s,format=raw"
 552                                   " -incoming %s %s",
 553                                   accel, tmpfs, bootpath, uri,
 554                                   extra_opts ? extra_opts : "");
 555         start_address = X86_TEST_MEM_START;
 556         end_address = X86_TEST_MEM_END;
 557     } else if (g_str_equal(arch, "s390x")) {
 558         init_bootfile_s390x(bootpath);
 559         extra_opts = use_shmem ? get_shmem_opts("128M", shmem_path) : NULL;
 560         cmd_src = g_strdup_printf("-machine accel=%s -m 128M"
 561                                   " -name source,debug-threads=on"
 562                                   " -serial file:%s/src_serial -bios %s %s",
 563                                   accel, tmpfs, bootpath,
 564                                   extra_opts ? extra_opts : "");
 565         cmd_dst = g_strdup_printf("-machine accel=%s -m 128M"
 566                                   " -name target,debug-threads=on"
 567                                   " -serial file:%s/dest_serial -bios %s"
 568                                   " -incoming %s %s",
 569                                   accel, tmpfs, bootpath, uri,
 570                                   extra_opts ? extra_opts : "");
 571         start_address = S390_TEST_MEM_START;
 572         end_address = S390_TEST_MEM_END;
 573     } else if (strcmp(arch, "ppc64") == 0) {
 574         extra_opts = use_shmem ? get_shmem_opts("256M", shmem_path) : NULL;
 575         cmd_src = g_strdup_printf("-machine accel=%s -m 256M -nodefaults"
 576                                   " -name source,debug-threads=on"
 577                                   " -serial file:%s/src_serial"
 578                                   " -prom-env 'use-nvramrc?=true' -prom-env "
 579                                   "'nvramrc=hex .\" _\" begin %x %x "
 580                                   "do i c@ 1 + i c! 1000 +loop .\" B\" 0 "
 581                                   "until' %s",  accel, tmpfs, end_address,
 582                                   start_address, extra_opts ? extra_opts : "");
 583         cmd_dst = g_strdup_printf("-machine accel=%s -m 256M"
 584                                   " -name target,debug-threads=on"
 585                                   " -serial file:%s/dest_serial"
 586                                   " -incoming %s %s",
 587                                   accel, tmpfs, uri,
 588                                   extra_opts ? extra_opts : "");
 589
 590         start_address = PPC_TEST_MEM_START;
 591         end_address = PPC_TEST_MEM_END;
 592     } else if (strcmp(arch, "aarch64") == 0) {
 593         init_bootfile(bootpath, aarch64_kernel);
 594         extra_opts = use_shmem ? get_shmem_opts("150M", shmem_path) : NULL;
 595         cmd_src = g_strdup_printf("-machine virt,accel=%s,gic-version=max "
 596                                   "-name vmsource,debug-threads=on -cpu max "
 597                                   "-m 150M -serial file:%s/src_serial "
 598                                   "-kernel %s %s",
 599                                   accel, tmpfs, bootpath,
 600                                   extra_opts ? extra_opts : "");
 601         cmd_dst = g_strdup_printf("-machine virt,accel=%s,gic-version=max "
 602                                   "-name vmdest,debug-threads=on -cpu max "
 603                                   "-m 150M -serial file:%s/dest_serial "
 604                                   "-kernel %s "
 605                                   "-incoming %s %s",
 606                                   accel, tmpfs, bootpath, uri,
 607                                   extra_opts ? extra_opts : "");
 608
 609         start_address = ARM_TEST_MEM_START;
 610         end_address = ARM_TEST_MEM_END;
 611
 612         g_assert(sizeof(aarch64_kernel) <= ARM_TEST_MAX_KERNEL_SIZE);
 613     } else {
 614         g_assert_not_reached();
 615     }
 616
 617     g_free(bootpath);
 618     g_free(extra_opts);
 619
 620     if (hide_stderr) {
 621         gchar *tmp;
 622         tmp = g_strdup_printf("%s 2>/dev/null", cmd_src);
 623         g_free(cmd_src);
 624         cmd_src = tmp;
 625
 626         tmp = g_strdup_printf("%s 2>/dev/null", cmd_dst);
 627         g_free(cmd_dst);
 628         cmd_dst = tmp;
 629     }
 630
 631     *from = qtest_start(cmd_src);
 632     g_free(cmd_src);
 633
 634     *to = qtest_init(cmd_dst);
 635     g_free(cmd_dst);
 636
 637     /*
 638      * Remove shmem file immediately to avoid memory leak in test failed case.
 639      * It's valid becase QEMU has already opened this file
 640      */
 641     if (use_shmem) {
 642         unlink(shmem_path);
 643         g_free(shmem_path);
 644     }
 645
 646     return 0;
 647 }
 648
 649 static void test_migrate_end(QTestState *from, QTestState *to, bool test_dest)
 650 {
 651     unsigned char dest_byte_a, dest_byte_b, dest_byte_c, dest_byte_d;
 652
 653     qtest_quit(from);
 654
 655     if (test_dest) {
 656         qtest_memread(to, start_address, &dest_byte_a, 1);
 657
 658         /* Destination still running, wait for a byte to change */
 659         do {
 660             qtest_memread(to, start_address, &dest_byte_b, 1);
 661             usleep(1000 * 10);
 662         } while (dest_byte_a == dest_byte_b);
 663
 664         qtest_qmp_discard_response(to, "{ 'execute' : 'stop'}");
 665
 666         /* With it stopped, check nothing changes */
 667         qtest_memread(to, start_address, &dest_byte_c, 1);
 668         usleep(1000 * 200);
 669         qtest_memread(to, start_address, &dest_byte_d, 1);
 670         g_assert_cmpint(dest_byte_c, ==, dest_byte_d);
 671
 672         check_guests_ram(to);
 673     }
 674
 675     qtest_quit(to);
 676
 677     cleanup("bootsect");
 678     cleanup("migsocket");
 679     cleanup("src_serial");
 680     cleanup("dest_serial");
 681 }
 682
 683 static void deprecated_set_downtime(QTestState *who, const double value)
 684 {
 685     QDict *rsp;
 686
 687     rsp = qtest_qmp(who,
 688                     "{ 'execute': 'migrate_set_downtime',"
 689                     " 'arguments': { 'value': %f } }", value);
 690     g_assert(qdict_haskey(rsp, "return"));
 691     qobject_unref(rsp);
 692     migrate_check_parameter(who, "downtime-limit", value * 1000);
 693 }
 694
 695 static void deprecated_set_speed(QTestState *who, long long value)
 696 {
 697     QDict *rsp;
 698
 699     rsp = qtest_qmp(who, "{ 'execute': 'migrate_set_speed',"
 700                           "'arguments': { 'value': %lld } }", value);
 701     g_assert(qdict_haskey(rsp, "return"));
 702     qobject_unref(rsp);
 703     migrate_check_parameter(who, "max-bandwidth", value);
 704 }
 705
 706 static void deprecated_set_cache_size(QTestState *who, long long value)
 707 {
 708     QDict *rsp;
 709
 710     rsp = qtest_qmp(who, "{ 'execute': 'migrate-set-cache-size',"
 711                          "'arguments': { 'value': %lld } }", value);
 712     g_assert(qdict_haskey(rsp, "return"));
 713     qobject_unref(rsp);
 714     migrate_check_parameter(who, "xbzrle-cache-size", value);
 715 }
 716
 717 static void test_deprecated(void)
 718 {
 719     QTestState *from;
 720
 721     from = qtest_start("-machine none");
 722
 723     deprecated_set_downtime(from, 0.12345);
 724     deprecated_set_speed(from, 12345);
 725     deprecated_set_cache_size(from, 4096);
 726
 727     qtest_quit(from);
 728 }
 729
 730 static int migrate_postcopy_prepare(QTestState **from_ptr,
 731                                      QTestState **to_ptr,
 732                                      bool hide_error)
 733 {
 734     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 735     QTestState *from, *to;
 736
 737     if (test_migrate_start(&from, &to, uri, hide_error, false)) {
 738         return -1;
 739     }
 740
 741     migrate_set_capability(from, "postcopy-ram", true);
 742     migrate_set_capability(to, "postcopy-ram", true);
 743     migrate_set_capability(to, "postcopy-blocktime", true);
 744
 745     /* We want to pick a speed slow enough that the test completes
 746      * quickly, but that it doesn't complete precopy even on a slow
 747      * machine, so also set the downtime.
 748      */
 749     migrate_set_parameter(from, "max-bandwidth", 100000000);
 750     migrate_set_parameter(from, "downtime-limit", 1);
 751
 752     /* Wait for the first serial output from the source */
 753     wait_for_serial("src_serial");
 754
 755     migrate(from, uri, "{}");
 756     g_free(uri);
 757
 758     wait_for_migration_pass(from);
 759
 760     *from_ptr = from;
 761     *to_ptr = to;
 762
 763     return 0;
 764 }
 765
 766 static void migrate_postcopy_complete(QTestState *from, QTestState *to)
 767 {
 768     wait_for_migration_complete(from);
 769
 770     /* Make sure we get at least one "B" on destination */
 771     wait_for_serial("dest_serial");
 772
 773     if (uffd_feature_thread_id) {
 774         read_blocktime(to);
 775     }
 776
 777     test_migrate_end(from, to, true);
 778 }
 779
 780 static void test_postcopy(void)
 781 {
 782     QTestState *from, *to;
 783
 784     if (migrate_postcopy_prepare(&from, &to, false)) {
 785         return;
 786     }
 787     migrate_postcopy_start(from, to);
 788     migrate_postcopy_complete(from, to);
 789 }
 790
 791 static void test_postcopy_recovery(void)
 792 {
 793     QTestState *from, *to;
 794     char *uri;
 795
 796     if (migrate_postcopy_prepare(&from, &to, true)) {
 797         return;
 798     }
 799
 800     /* Turn postcopy speed down, 4K/s is slow enough on any machines */
 801     migrate_set_parameter(from, "max-postcopy-bandwidth", 4096);
 802
 803     /* Now we start the postcopy */
 804     migrate_postcopy_start(from, to);
 805
 806     /*
 807      * Wait until postcopy is really started; we can only run the
 808      * migrate-pause command during a postcopy
 809      */
 810     wait_for_migration_status(from, "postcopy-active");
 811
 812     /*
 813      * Manually stop the postcopy migration. This emulates a network
 814      * failure with the migration socket
 815      */
 816     migrate_pause(from);
 817
 818     /*
 819      * Wait for destination side to reach postcopy-paused state.  The
 820      * migrate-recover command can only succeed if destination machine
 821      * is in the paused state
 822      */
 823     wait_for_migration_status(to, "postcopy-paused");
 824
 825     /*
 826      * Create a new socket to emulate a new channel that is different
 827      * from the broken migration channel; tell the destination to
 828      * listen to the new port
 829      */
 830     uri = g_strdup_printf("unix:%s/migsocket-recover", tmpfs);
 831     migrate_recover(to, uri);
 832
 833     /*
 834      * Try to rebuild the migration channel using the resume flag and
 835      * the newly created channel
 836      */
 837     wait_for_migration_status(from, "postcopy-paused");
 838     migrate(from, uri, "{'resume': true}");
 839     g_free(uri);
 840
 841     /* Restore the postcopy bandwidth to unlimited */
 842     migrate_set_parameter(from, "max-postcopy-bandwidth", 0);
 843
 844     migrate_postcopy_complete(from, to);
 845 }
 846
 847 static void test_baddest(void)
 848 {
 849     QTestState *from, *to;
 850     QDict *rsp_return;
 851     char *status;
 852     bool failed;
 853
 854     if (test_migrate_start(&from, &to, "tcp:0:0", true, false)) {
 855         return;
 856     }
 857     migrate(from, "tcp:0:0", "{}");
 858     do {
 859         status = migrate_query_status(from);
 860         g_assert(!strcmp(status, "setup") || !(strcmp(status, "failed")));
 861         failed = !strcmp(status, "failed");
 862         g_free(status);
 863     } while (!failed);
 864
 865     /* Is the machine currently running? */
 866     rsp_return = wait_command(from, "{ 'execute': 'query-status' }");
 867     g_assert(qdict_haskey(rsp_return, "running"));
 868     g_assert(qdict_get_bool(rsp_return, "running"));
 869     qobject_unref(rsp_return);
 870
 871     test_migrate_end(from, to, false);
 872 }
 873
 874 static void test_precopy_unix(void)
 875 {
 876     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 877     QTestState *from, *to;
 878
 879     if (test_migrate_start(&from, &to, uri, false, false)) {
 880         return;
 881     }
 882
 883     /* We want to pick a speed slow enough that the test completes
 884      * quickly, but that it doesn't complete precopy even on a slow
 885      * machine, so also set the downtime.
 886      */
 887     /* 1 ms should make it not converge*/
 888     migrate_set_parameter(from, "downtime-limit", 1);
 889     /* 1GB/s */
 890     migrate_set_parameter(from, "max-bandwidth", 1000000000);
 891
 892     /* Wait for the first serial output from the source */
 893     wait_for_serial("src_serial");
 894
 895     migrate(from, uri, "{}");
 896
 897     wait_for_migration_pass(from);
 898
 899     /* 300 ms should converge */
 900     migrate_set_parameter(from, "downtime-limit", 300);
 901
 902     if (!got_stop) {
 903         qtest_qmp_eventwait(from, "STOP");
 904     }
 905
 906     qtest_qmp_eventwait(to, "RESUME");
 907
 908     wait_for_serial("dest_serial");
 909     wait_for_migration_complete(from);
 910
 911     test_migrate_end(from, to, true);
 912     g_free(uri);
 913 }
 914
 915 #if 0
 916 /* Currently upset on aarch64 TCG */
 917 static void test_ignore_shared(void)
 918 {
 919     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 920     QTestState *from, *to;
 921
 922     if (test_migrate_start(&from, &to, uri, false, true)) {
 923         return;
 924     }
 925
 926     migrate_set_capability(from, "x-ignore-shared", true);
 927     migrate_set_capability(to, "x-ignore-shared", true);
 928
 929     /* Wait for the first serial output from the source */
 930     wait_for_serial("src_serial");
 931
 932     migrate(from, uri, "{}");
 933
 934     wait_for_migration_pass(from);
 935
 936     if (!got_stop) {
 937         qtest_qmp_eventwait(from, "STOP");
 938     }
 939
 940     qtest_qmp_eventwait(to, "RESUME");
 941
 942     wait_for_serial("dest_serial");
 943     wait_for_migration_complete(from);
 944
 945     /* Check whether shared RAM has been really skipped */
 946     g_assert_cmpint(read_ram_property_int(from, "transferred"), <, 1024 * 1024);
 947
 948     test_migrate_end(from, to, true);
 949     g_free(uri);
 950 }
 951 #endif
 952
 953 static void test_xbzrle(const char *uri)
 954 {
 955     QTestState *from, *to;
 956
 957     if (test_migrate_start(&from, &to, uri, false, false)) {
 958         return;
 959     }
 960
 961     /*
 962      * We want to pick a speed slow enough that the test completes
 963      * quickly, but that it doesn't complete precopy even on a slow
 964      * machine, so also set the downtime.
 965      */
 966     /* 1 ms should make it not converge*/
 967     migrate_set_parameter(from, "downtime-limit", 1);
 968     /* 1GB/s */
 969     migrate_set_parameter(from, "max-bandwidth", 1000000000);
 970
 971     migrate_set_parameter(from, "xbzrle-cache-size", 33554432);
 972
 973     migrate_set_capability(from, "xbzrle", "true");
 974     migrate_set_capability(to, "xbzrle", "true");
 975     /* Wait for the first serial output from the source */
 976     wait_for_serial("src_serial");
 977
 978     migrate(from, uri, "{}");
 979
 980     wait_for_migration_pass(from);
 981
 982     /* 300ms should converge */
 983     migrate_set_parameter(from, "downtime-limit", 300);
 984
 985     if (!got_stop) {
 986         qtest_qmp_eventwait(from, "STOP");
 987     }
 988     qtest_qmp_eventwait(to, "RESUME");
 989
 990     wait_for_serial("dest_serial");
 991     wait_for_migration_complete(from);
 992
 993     test_migrate_end(from, to, true);
 994 }
 995
 996 static void test_xbzrle_unix(void)
 997 {
 998     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 999
1000     test_xbzrle(uri);
1001     g_free(uri);
1002 }
1003
1004 static void test_precopy_tcp(void)
1005 {
1006     char *uri;
1007     QTestState *from, *to;
1008
1009     if (test_migrate_start(&from, &to, "tcp:127.0.0.1:0", false, false)) {
1010         return;
1011     }
1012
1013     /*
1014      * We want to pick a speed slow enough that the test completes
1015      * quickly, but that it doesn't complete precopy even on a slow
1016      * machine, so also set the downtime.
1017      */
1018     /* 1 ms should make it not converge*/
1019     migrate_set_parameter(from, "downtime-limit", 1);
1020     /* 1GB/s */
1021     migrate_set_parameter(from, "max-bandwidth", 1000000000);
1022
1023     /* Wait for the first serial output from the source */
1024     wait_for_serial("src_serial");
1025
1026     uri = migrate_get_socket_address(to, "socket-address");
1027
1028     migrate(from, uri, "{}");
1029
1030     wait_for_migration_pass(from);
1031
1032     /* 300ms should converge */
1033     migrate_set_parameter(from, "downtime-limit", 300);
1034
1035     if (!got_stop) {
1036         qtest_qmp_eventwait(from, "STOP");
1037     }
1038     qtest_qmp_eventwait(to, "RESUME");
1039
1040     wait_for_serial("dest_serial");
1041     wait_for_migration_complete(from);
1042
1043     test_migrate_end(from, to, true);
1044     g_free(uri);
1045 }
1046
1047 static void test_migrate_fd_proto(void)
1048 {
1049     QTestState *from, *to;
1050     int ret;
1051     int pair[2];
1052     QDict *rsp;
1053     const char *error_desc;
1054
1055     if (test_migrate_start(&from, &to, "defer", false, false)) {
1056         return;
1057     }
1058
1059     /*
1060      * We want to pick a speed slow enough that the test completes
1061      * quickly, but that it doesn't complete precopy even on a slow
1062      * machine, so also set the downtime.
1063      */
1064     /* 1 ms should make it not converge */
1065     migrate_set_parameter(from, "downtime-limit", 1);
1066     /* 1GB/s */
1067     migrate_set_parameter(from, "max-bandwidth", 1000000000);
1068
1069     /* Wait for the first serial output from the source */
1070     wait_for_serial("src_serial");
1071
1072     /* Create two connected sockets for migration */
1073     ret = socketpair(PF_LOCAL, SOCK_STREAM, 0, pair);
1074     g_assert_cmpint(ret, ==, 0);
1075
1076     /* Send the 1st socket to the target */
1077     rsp = wait_command_fd(to, pair[0],
1078                           "{ 'execute': 'getfd',"
1079                           "  'arguments': { 'fdname': 'fd-mig' }}");
1080     qobject_unref(rsp);
1081     close(pair[0]);
1082
1083     /* Start incoming migration from the 1st socket */
1084     rsp = wait_command(to, "{ 'execute': 'migrate-incoming',"
1085                            "  'arguments': { 'uri': 'fd:fd-mig' }}");
1086     qobject_unref(rsp);
1087
1088     /* Send the 2nd socket to the target */
1089     rsp = wait_command_fd(from, pair[1],
1090                           "{ 'execute': 'getfd',"
1091                           "  'arguments': { 'fdname': 'fd-mig' }}");
1092     qobject_unref(rsp);
1093     close(pair[1]);
1094
1095     /* Start migration to the 2nd socket*/
1096     migrate(from, "fd:fd-mig", "{}");
1097
1098     wait_for_migration_pass(from);
1099
1100     /* 300ms should converge */
1101     migrate_set_parameter(from, "downtime-limit", 300);
1102
1103     if (!got_stop) {
1104         qtest_qmp_eventwait(from, "STOP");
1105     }
1106     qtest_qmp_eventwait(to, "RESUME");
1107
1108     /* Test closing fds */
1109     /* We assume, that QEMU removes named fd from its list,
1110      * so this should fail */
1111     rsp = qtest_qmp(from, "{ '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     rsp = qtest_qmp(to, "{ 'execute': 'closefd',"
1119                         "  'arguments': { 'fdname': 'fd-mig' }}");
1120     g_assert_true(qdict_haskey(rsp, "error"));
1121     error_desc = qdict_get_str(qdict_get_qdict(rsp, "error"), "desc");
1122     g_assert_cmpstr(error_desc, ==, "File descriptor named 'fd-mig' not found");
1123     qobject_unref(rsp);
1124
1125     /* Complete migration */
1126     wait_for_serial("dest_serial");
1127     wait_for_migration_complete(from);
1128     test_migrate_end(from, to, true);
1129 }
1130
1131 int main(int argc, char **argv)
1132 {
1133     char template[] = "/tmp/migration-test-XXXXXX";
1134     int ret;
1135
1136     g_test_init(&argc, &argv, NULL);
1137
1138     if (!ufd_version_check()) {
1139         return g_test_run();
1140     }
1141
1142     /*
1143      * On ppc64, the test only works with kvm-hv, but not with kvm-pr and TCG
1144      * is touchy due to race conditions on dirty bits (especially on PPC for
1145      * some reason)
1146      */
1147     if (g_str_equal(qtest_get_arch(), "ppc64") &&
1148         access("/sys/module/kvm_hv", F_OK)) {
1149         g_test_message("Skipping test: kvm_hv not available");
1150         return g_test_run();
1151     }
1152
1153     /*
1154      * Similar to ppc64, s390x seems to be touchy with TCG, so disable it
1155      * there until the problems are resolved
1156      */
1157     if (g_str_equal(qtest_get_arch(), "s390x")) {
1158 #if defined(HOST_S390X)
1159         if (access("/dev/kvm", R_OK | W_OK)) {
1160             g_test_message("Skipping test: kvm not available");
1161             return g_test_run();
1162         }
1163 #else
1164         g_test_message("Skipping test: Need s390x host to work properly");
1165         return g_test_run();
1166 #endif
1167     }
1168
1169     tmpfs = mkdtemp(template);
1170     if (!tmpfs) {
1171         g_test_message("mkdtemp on path (%s): %s", template, strerror(errno));
1172     }
1173     g_assert(tmpfs);
1174
1175     module_call_init(MODULE_INIT_QOM);
1176
1177     qtest_add_func("/migration/postcopy/unix", test_postcopy);
1178     qtest_add_func("/migration/postcopy/recovery", test_postcopy_recovery);
1179     qtest_add_func("/migration/deprecated", test_deprecated);
1180     qtest_add_func("/migration/bad_dest", test_baddest);
1181     qtest_add_func("/migration/precopy/unix", test_precopy_unix);
1182     qtest_add_func("/migration/precopy/tcp", test_precopy_tcp);
1183     /* qtest_add_func("/migration/ignore_shared", test_ignore_shared); */
1184     qtest_add_func("/migration/xbzrle/unix", test_xbzrle_unix);
1185     qtest_add_func("/migration/fd_proto", test_migrate_fd_proto);
1186
1187     ret = g_test_run();
1188
1189     g_assert_cmpint(ret, ==, 0);
1190
1191     ret = rmdir(tmpfs);
1192     if (ret != 0) {
1193         g_test_message("unable to rmdir: path (%s): %s",
1194                        tmpfs, strerror(errno));
1195     }
1196
1197     return ret;
1198 }