tests/migration-test.c

   1 /*
   2  * QTest testcase for migration
   3  *
   4  * Copyright (c) 2016 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 "qemu/option.h"
  17 #include "qemu/range.h"
  18 #include "qemu/sockets.h"
  19 #include "chardev/char.h"
  20 #include "sysemu/sysemu.h"
  21 #include "hw/nvram/chrp_nvram.h"
  22
  23 #define MIN_NVRAM_SIZE 8192 /* from spapr_nvram.c */
  24
  25 const unsigned start_address = 1024 * 1024;
  26 const unsigned end_address = 100 * 1024 * 1024;
  27 bool got_stop;
  28
  29 #if defined(__linux__)
  30 #include <sys/syscall.h>
  31 #include <sys/vfs.h>
  32 #endif
  33
  34 #if defined(__linux__) && defined(__NR_userfaultfd) && defined(CONFIG_EVENTFD)
  35 #include <sys/eventfd.h>
  36 #include <sys/ioctl.h>
  37 #include <linux/userfaultfd.h>
  38
  39 static bool ufd_version_check(void)
  40 {
  41     struct uffdio_api api_struct;
  42     uint64_t ioctl_mask;
  43
  44     int ufd = syscall(__NR_userfaultfd, O_CLOEXEC);
  45
  46     if (ufd == -1) {
  47         g_test_message("Skipping test: userfaultfd not available");
  48         return false;
  49     }
  50
  51     api_struct.api = UFFD_API;
  52     api_struct.features = 0;
  53     if (ioctl(ufd, UFFDIO_API, &api_struct)) {
  54         g_test_message("Skipping test: UFFDIO_API failed");
  55         return false;
  56     }
  57
  58     ioctl_mask = (__u64)1 << _UFFDIO_REGISTER |
  59                  (__u64)1 << _UFFDIO_UNREGISTER;
  60     if ((api_struct.ioctls & ioctl_mask) != ioctl_mask) {
  61         g_test_message("Skipping test: Missing userfault feature");
  62         return false;
  63     }
  64
  65     return true;
  66 }
  67
  68 #else
  69 static bool ufd_version_check(void)
  70 {
  71     g_test_message("Skipping test: Userfault not available (builtdtime)");
  72     return false;
  73 }
  74
  75 #endif
  76
  77 static const char *tmpfs;
  78
  79 /* A simple PC boot sector that modifies memory (1-100MB) quickly
  80  * outputing a 'B' every so often if it's still running.
  81  */
  82 unsigned char bootsect[] = {
  83   0xfa, 0x0f, 0x01, 0x16, 0x74, 0x7c, 0x66, 0xb8, 0x01, 0x00, 0x00, 0x00,
  84   0x0f, 0x22, 0xc0, 0x66, 0xea, 0x20, 0x7c, 0x00, 0x00, 0x08, 0x00, 0x00,
  85   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe4, 0x92, 0x0c, 0x02,
  86   0xe6, 0x92, 0xb8, 0x10, 0x00, 0x00, 0x00, 0x8e, 0xd8, 0x66, 0xb8, 0x41,
  87   0x00, 0x66, 0xba, 0xf8, 0x03, 0xee, 0xb3, 0x00, 0xb8, 0x00, 0x00, 0x10,
  88   0x00, 0xfe, 0x00, 0x05, 0x00, 0x10, 0x00, 0x00, 0x3d, 0x00, 0x00, 0x40,
  89   0x06, 0x7c, 0xf2, 0xfe, 0xc3, 0x75, 0xe9, 0x66, 0xb8, 0x42, 0x00, 0x66,
  90   0xba, 0xf8, 0x03, 0xee, 0xeb, 0xde, 0x66, 0x90, 0x00, 0x00, 0x00, 0x00,
  91   0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x9a, 0xcf, 0x00,
  92   0xff, 0xff, 0x00, 0x00, 0x00, 0x92, 0xcf, 0x00, 0x27, 0x00, 0x5c, 0x7c,
  93   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  94   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  95   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  96   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  97   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  98   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  99   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 100   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 101   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 102   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 103   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 104   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 105   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 106   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 107   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 108   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 109   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 110   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 111   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 112   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 113   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 114   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 115   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 116   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 117   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 118   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 119   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 120   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 121   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 122   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 123   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 124   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 125   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0xaa
 126 };
 127
 128 static void init_bootfile_x86(const char *bootpath)
 129 {
 130     FILE *bootfile = fopen(bootpath, "wb");
 131
 132     g_assert_cmpint(fwrite(bootsect, 512, 1, bootfile), ==, 1);
 133     fclose(bootfile);
 134 }
 135
 136 static void init_bootfile_ppc(const char *bootpath)
 137 {
 138     FILE *bootfile;
 139     char buf[MIN_NVRAM_SIZE];
 140     ChrpNvramPartHdr *header = (ChrpNvramPartHdr *)buf;
 141
 142     memset(buf, 0, MIN_NVRAM_SIZE);
 143
 144     /* Create a "common" partition in nvram to store boot-command property */
 145
 146     header->signature = CHRP_NVPART_SYSTEM;
 147     memcpy(header->name, "common", 6);
 148     chrp_nvram_finish_partition(header, MIN_NVRAM_SIZE);
 149
 150     /* FW_MAX_SIZE is 4MB, but slof.bin is only 900KB,
 151      * so let's modify memory between 1MB and 100MB
 152      * to do like PC bootsector
 153      */
 154
 155     sprintf(buf + 16,
 156             "boot-command=hex .\" _\" begin %x %x do i c@ 1 + i c! 1000 +loop "
 157             ".\" B\" 0 until", end_address, start_address);
 158
 159     /* Write partition to the NVRAM file */
 160
 161     bootfile = fopen(bootpath, "wb");
 162     g_assert_cmpint(fwrite(buf, MIN_NVRAM_SIZE, 1, bootfile), ==, 1);
 163     fclose(bootfile);
 164 }
 165
 166 /*
 167  * Wait for some output in the serial output file,
 168  * we get an 'A' followed by an endless string of 'B's
 169  * but on the destination we won't have the A.
 170  */
 171 static void wait_for_serial(const char *side)
 172 {
 173     char *serialpath = g_strdup_printf("%s/%s", tmpfs, side);
 174     FILE *serialfile = fopen(serialpath, "r");
 175     const char *arch = qtest_get_arch();
 176     int started = (strcmp(side, "src_serial") == 0 &&
 177                    strcmp(arch, "ppc64") == 0) ? 0 : 1;
 178
 179     g_free(serialpath);
 180     do {
 181         int readvalue = fgetc(serialfile);
 182
 183         if (!started) {
 184             /* SLOF prints its banner before starting test,
 185              * to ignore it, mark the start of the test with '_',
 186              * ignore all characters until this marker
 187              */
 188             switch (readvalue) {
 189             case '_':
 190                 started = 1;
 191                 break;
 192             case EOF:
 193                 fseek(serialfile, 0, SEEK_SET);
 194                 usleep(1000);
 195                 break;
 196             }
 197             continue;
 198         }
 199         switch (readvalue) {
 200         case 'A':
 201             /* Fine */
 202             break;
 203
 204         case 'B':
 205             /* It's alive! */
 206             fclose(serialfile);
 207             return;
 208
 209         case EOF:
 210             started = (strcmp(side, "src_serial") == 0 &&
 211                        strcmp(arch, "ppc64") == 0) ? 0 : 1;
 212             fseek(serialfile, 0, SEEK_SET);
 213             usleep(1000);
 214             break;
 215
 216         default:
 217             fprintf(stderr, "Unexpected %d on %s serial\n", readvalue, side);
 218             g_assert_not_reached();
 219         }
 220     } while (true);
 221 }
 222
 223 /*
 224  * Events can get in the way of responses we are actually waiting for.
 225  */
 226 static QDict *wait_command(QTestState *who, const char *command)
 227 {
 228     const char *event_string;
 229     QDict *response;
 230
 231     response = qtest_qmp(who, command);
 232
 233     while (qdict_haskey(response, "event")) {
 234         /* OK, it was an event */
 235         event_string = qdict_get_str(response, "event");
 236         if (!strcmp(event_string, "STOP")) {
 237             got_stop = true;
 238         }
 239         QDECREF(response);
 240         response = qtest_qmp_receive(who);
 241     }
 242     return response;
 243 }
 244
 245
 246 /*
 247  * It's tricky to use qemu's migration event capability with qtest,
 248  * events suddenly appearing confuse the qmp()/hmp() responses.
 249  */
 250
 251 static uint64_t get_migration_pass(QTestState *who)
 252 {
 253     QDict *rsp, *rsp_return, *rsp_ram;
 254     uint64_t result;
 255
 256     rsp = wait_command(who, "{ 'execute': 'query-migrate' }");
 257     rsp_return = qdict_get_qdict(rsp, "return");
 258     if (!qdict_haskey(rsp_return, "ram")) {
 259         /* Still in setup */
 260         result = 0;
 261     } else {
 262         rsp_ram = qdict_get_qdict(rsp_return, "ram");
 263         result = qdict_get_try_int(rsp_ram, "dirty-sync-count", 0);
 264     }
 265     QDECREF(rsp);
 266     return result;
 267 }
 268
 269 static void wait_for_migration_complete(QTestState *who)
 270 {
 271     QDict *rsp, *rsp_return;
 272     bool completed;
 273
 274     do {
 275         const char *status;
 276
 277         rsp = wait_command(who, "{ 'execute': 'query-migrate' }");
 278         rsp_return = qdict_get_qdict(rsp, "return");
 279         status = qdict_get_str(rsp_return, "status");
 280         completed = strcmp(status, "completed") == 0;
 281         g_assert_cmpstr(status, !=,  "failed");
 282         QDECREF(rsp);
 283         usleep(1000 * 100);
 284     } while (!completed);
 285 }
 286
 287 static void wait_for_migration_pass(QTestState *who)
 288 {
 289     uint64_t initial_pass = get_migration_pass(who);
 290     uint64_t pass;
 291
 292     /* Wait for the 1st sync */
 293     do {
 294         initial_pass = get_migration_pass(who);
 295         if (got_stop || initial_pass) {
 296             break;
 297         }
 298         usleep(1000 * 100);
 299     } while (true);
 300
 301     do {
 302         usleep(1000 * 100);
 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      * 1MB to <100MB in order.
 311      * This gives us a constraint that any page's byte should be equal or less
 312      * than the previous pages byte (mod 256); and they should all be equal
 313      * except for one transition at the point where we meet the incrementer.
 314      * (We're running this with 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 + 4096; address < end_address; address += 4096)
 326     {
 327         uint8_t b;
 328         qtest_memread(who, address, &b, 1);
 329         if (b != last_byte) {
 330             if (((b + 1) % 256) == last_byte && !hit_edge) {
 331                 /* This is OK, the guest stopped at the point of
 332                  * incrementing the previous page but didn't get
 333                  * to us yet.
 334                  */
 335                 hit_edge = true;
 336             } else {
 337                 fprintf(stderr, "Memory content inconsistency at %x"
 338                                 " first_byte = %x last_byte = %x current = %x"
 339                                 " hit_edge = %x\n",
 340                                 address, first_byte, last_byte, b, hit_edge);
 341                 bad = true;
 342             }
 343         }
 344         last_byte = b;
 345     }
 346     g_assert_false(bad);
 347 }
 348
 349 static void cleanup(const char *filename)
 350 {
 351     char *path = g_strdup_printf("%s/%s", tmpfs, filename);
 352
 353     unlink(path);
 354     g_free(path);
 355 }
 356
 357 static void migrate_check_parameter(QTestState *who, const char *parameter,
 358                                     const char *value)
 359 {
 360     QDict *rsp, *rsp_return;
 361     char *result;
 362
 363     rsp = wait_command(who, "{ 'execute': 'query-migrate-parameters' }");
 364     rsp_return = qdict_get_qdict(rsp, "return");
 365     result = g_strdup_printf("%" PRId64,
 366                              qdict_get_try_int(rsp_return,  parameter, -1));
 367     g_assert_cmpstr(result, ==, value);
 368     g_free(result);
 369     QDECREF(rsp);
 370 }
 371
 372 static void migrate_set_parameter(QTestState *who, const char *parameter,
 373                                   const char *value)
 374 {
 375     QDict *rsp;
 376     gchar *cmd;
 377
 378     cmd = g_strdup_printf("{ 'execute': 'migrate-set-parameters',"
 379                           "'arguments': { '%s': %s } }",
 380                           parameter, value);
 381     rsp = qtest_qmp(who, cmd);
 382     g_free(cmd);
 383     g_assert(qdict_haskey(rsp, "return"));
 384     QDECREF(rsp);
 385     migrate_check_parameter(who, parameter, value);
 386 }
 387
 388 static void migrate_set_capability(QTestState *who, const char *capability,
 389                                    const char *value)
 390 {
 391     QDict *rsp;
 392     gchar *cmd;
 393
 394     cmd = g_strdup_printf("{ 'execute': 'migrate-set-capabilities',"
 395                           "'arguments': { "
 396                           "'capabilities': [ { "
 397                           "'capability': '%s', 'state': %s } ] } }",
 398                           capability, value);
 399     rsp = qtest_qmp(who, cmd);
 400     g_free(cmd);
 401     g_assert(qdict_haskey(rsp, "return"));
 402     QDECREF(rsp);
 403 }
 404
 405 static void migrate(QTestState *who, const char *uri)
 406 {
 407     QDict *rsp;
 408     gchar *cmd;
 409
 410     cmd = g_strdup_printf("{ 'execute': 'migrate',"
 411                           "'arguments': { 'uri': '%s' } }",
 412                           uri);
 413     rsp = qtest_qmp(who, cmd);
 414     g_free(cmd);
 415     g_assert(qdict_haskey(rsp, "return"));
 416     QDECREF(rsp);
 417 }
 418
 419 static void migrate_start_postcopy(QTestState *who)
 420 {
 421     QDict *rsp;
 422
 423     rsp = wait_command(who, "{ 'execute': 'migrate-start-postcopy' }");
 424     g_assert(qdict_haskey(rsp, "return"));
 425     QDECREF(rsp);
 426 }
 427
 428 static void test_migrate_start(QTestState **from, QTestState **to,
 429                                const char *uri)
 430 {
 431     gchar *cmd_src, *cmd_dst;
 432     char *bootpath = g_strdup_printf("%s/bootsect", tmpfs);
 433     const char *arch = qtest_get_arch();
 434     const char *accel = "kvm:tcg";
 435
 436     got_stop = false;
 437
 438     if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
 439         init_bootfile_x86(bootpath);
 440         cmd_src = g_strdup_printf("-machine accel=%s -m 150M"
 441                                   " -name source,debug-threads=on"
 442                                   " -serial file:%s/src_serial"
 443                                   " -drive file=%s,format=raw",
 444                                   accel, tmpfs, bootpath);
 445         cmd_dst = g_strdup_printf("-machine accel=%s -m 150M"
 446                                   " -name target,debug-threads=on"
 447                                   " -serial file:%s/dest_serial"
 448                                   " -drive file=%s,format=raw"
 449                                   " -incoming %s",
 450                                   accel, tmpfs, bootpath, uri);
 451     } else if (strcmp(arch, "ppc64") == 0) {
 452
 453         /* On ppc64, the test only works with kvm-hv, but not with kvm-pr */
 454         if (access("/sys/module/kvm_hv", F_OK)) {
 455             accel = "tcg";
 456         }
 457         init_bootfile_ppc(bootpath);
 458         cmd_src = g_strdup_printf("-machine accel=%s -m 256M"
 459                                   " -name source,debug-threads=on"
 460                                   " -serial file:%s/src_serial"
 461                                   " -drive file=%s,if=pflash,format=raw",
 462                                   accel, tmpfs, bootpath);
 463         cmd_dst = g_strdup_printf("-machine accel=%s -m 256M"
 464                                   " -name target,debug-threads=on"
 465                                   " -serial file:%s/dest_serial"
 466                                   " -incoming %s",
 467                                   accel, tmpfs, uri);
 468     } else {
 469         g_assert_not_reached();
 470     }
 471
 472     g_free(bootpath);
 473
 474     *from = qtest_start(cmd_src);
 475     g_free(cmd_src);
 476
 477     *to = qtest_init(cmd_dst);
 478     g_free(cmd_dst);
 479 }
 480
 481 static void test_migrate_end(QTestState *from, QTestState *to)
 482 {
 483     unsigned char dest_byte_a, dest_byte_b, dest_byte_c, dest_byte_d;
 484
 485     qtest_quit(from);
 486
 487     qtest_memread(to, start_address, &dest_byte_a, 1);
 488
 489     /* Destination still running, wait for a byte to change */
 490     do {
 491         qtest_memread(to, start_address, &dest_byte_b, 1);
 492         usleep(10 * 1000);
 493     } while (dest_byte_a == dest_byte_b);
 494
 495     qtest_qmp_discard_response(to, "{ 'execute' : 'stop'}");
 496     /* With it stopped, check nothing changes */
 497     qtest_memread(to, start_address, &dest_byte_c, 1);
 498     sleep(1);
 499     qtest_memread(to, start_address, &dest_byte_d, 1);
 500     g_assert_cmpint(dest_byte_c, ==, dest_byte_d);
 501
 502     check_guests_ram(to);
 503
 504     qtest_quit(to);
 505
 506     cleanup("bootsect");
 507     cleanup("migsocket");
 508     cleanup("src_serial");
 509     cleanup("dest_serial");
 510 }
 511
 512 static void deprecated_set_downtime(QTestState *who, const double value)
 513 {
 514     QDict *rsp;
 515     gchar *cmd;
 516     char *expected;
 517     int64_t result_int;
 518
 519     cmd = g_strdup_printf("{ 'execute': 'migrate_set_downtime',"
 520                           "'arguments': { 'value': %g } }", value);
 521     rsp = qtest_qmp(who, cmd);
 522     g_free(cmd);
 523     g_assert(qdict_haskey(rsp, "return"));
 524     QDECREF(rsp);
 525     result_int = value * 1000L;
 526     expected = g_strdup_printf("%" PRId64, result_int);
 527     migrate_check_parameter(who, "downtime-limit", expected);
 528     g_free(expected);
 529 }
 530
 531 static void deprecated_set_speed(QTestState *who, const char *value)
 532 {
 533     QDict *rsp;
 534     gchar *cmd;
 535
 536     cmd = g_strdup_printf("{ 'execute': 'migrate_set_speed',"
 537                           "'arguments': { 'value': %s } }", value);
 538     rsp = qtest_qmp(who, cmd);
 539     g_free(cmd);
 540     g_assert(qdict_haskey(rsp, "return"));
 541     QDECREF(rsp);
 542     migrate_check_parameter(who, "max-bandwidth", value);
 543 }
 544
 545 static void test_deprecated(void)
 546 {
 547     QTestState *from;
 548
 549     from = qtest_start("");
 550
 551     deprecated_set_downtime(from, 0.12345);
 552     deprecated_set_speed(from, "12345");
 553
 554     qtest_quit(from);
 555 }
 556
 557 static void test_migrate(void)
 558 {
 559     char *uri = g_strdup_printf("unix:%s/migsocket", tmpfs);
 560     QTestState *from, *to;
 561
 562     test_migrate_start(&from, &to, uri);
 563
 564     migrate_set_capability(from, "postcopy-ram", "true");
 565     migrate_set_capability(to, "postcopy-ram", "true");
 566
 567     /* We want to pick a speed slow enough that the test completes
 568      * quickly, but that it doesn't complete precopy even on a slow
 569      * machine, so also set the downtime.
 570      */
 571     migrate_set_parameter(from, "max-bandwidth", "100000000");
 572     migrate_set_parameter(from, "downtime-limit", "1");
 573
 574     /* Wait for the first serial output from the source */
 575     wait_for_serial("src_serial");
 576
 577     migrate(from, uri);
 578
 579     wait_for_migration_pass(from);
 580
 581     migrate_start_postcopy(from);
 582
 583     if (!got_stop) {
 584         qtest_qmp_eventwait(from, "STOP");
 585     }
 586
 587     qtest_qmp_eventwait(to, "RESUME");
 588
 589     wait_for_serial("dest_serial");
 590     wait_for_migration_complete(from);
 591
 592     g_free(uri);
 593
 594     test_migrate_end(from, to);
 595 }
 596
 597 int main(int argc, char **argv)
 598 {
 599     char template[] = "/tmp/migration-test-XXXXXX";
 600     int ret;
 601
 602     g_test_init(&argc, &argv, NULL);
 603
 604     if (!ufd_version_check()) {
 605         return 0;
 606     }
 607
 608     tmpfs = mkdtemp(template);
 609     if (!tmpfs) {
 610         g_test_message("mkdtemp on path (%s): %s\n", template, strerror(errno));
 611     }
 612     g_assert(tmpfs);
 613
 614     module_call_init(MODULE_INIT_QOM);
 615
 616     qtest_add_func("/migration/postcopy/unix", test_migrate);
 617     qtest_add_func("/migration/deprecated", test_deprecated);
 618
 619     ret = g_test_run();
 620
 621     g_assert_cmpint(ret, ==, 0);
 622
 623     ret = rmdir(tmpfs);
 624     if (ret != 0) {
 625         g_test_message("unable to rmdir: path (%s): %s\n",
 626                        tmpfs, strerror(errno));
 627     }
 628
 629     return ret;
 630 }