tests/unit/test-replication.c

   1 /*
   2  * Block replication tests
   3  *
   4  * Copyright (c) 2016 FUJITSU LIMITED
   5  * Author: Changlong Xie <xiecl.fnst@cn.fujitsu.com>
   6  *
   7  * This work is licensed under the terms of the GNU GPL, version 2 or
   8  * later.  See the COPYING file in the top-level directory.
   9  */
  10
  11 #include "qemu/osdep.h"
  12
  13 #include "qapi/error.h"
  14 #include "qapi/qmp/qdict.h"
  15 #include "qemu/option.h"
  16 #include "qemu/main-loop.h"
  17 #include "block/replication.h"
  18 #include "block/block_int.h"
  19 #include "block/qdict.h"
  20 #include "sysemu/block-backend.h"
  21
  22 #define IMG_SIZE (64 * 1024 * 1024)
  23
  24 /* primary */
  25 #define P_ID "primary-id"
  26 static char *p_local_disk;
  27
  28 /* secondary */
  29 #define S_ID "secondary-id"
  30 #define S_LOCAL_DISK_ID "secondary-local-disk-id"
  31 static char *s_local_disk;
  32 static char *s_active_disk;
  33 static char *s_hidden_disk;
  34
  35 /* FIXME: steal from blockdev.c */
  36 QemuOptsList qemu_drive_opts = {
  37     .name = "drive",
  38     .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
  39     .desc = {
  40         { /* end of list */ }
  41     },
  42 };
  43
  44 #define NOT_DONE 0x7fffffff
  45
  46 static void blk_rw_done(void *opaque, int ret)
  47 {
  48     *(int *)opaque = ret;
  49 }
  50
  51 static void test_blk_read(BlockBackend *blk, long pattern,
  52                           int64_t pattern_offset, int64_t pattern_count,
  53                           int64_t offset, int64_t count,
  54                           bool expect_failed)
  55 {
  56     void *pattern_buf = NULL;
  57     QEMUIOVector qiov;
  58     void *cmp_buf = NULL;
  59     int async_ret = NOT_DONE;
  60
  61     if (pattern) {
  62         cmp_buf = g_malloc(pattern_count);
  63         memset(cmp_buf, pattern, pattern_count);
  64     }
  65
  66     pattern_buf = g_malloc(count);
  67     if (pattern) {
  68         memset(pattern_buf, pattern, count);
  69     } else {
  70         memset(pattern_buf, 0x00, count);
  71     }
  72
  73     qemu_iovec_init(&qiov, 1);
  74     qemu_iovec_add(&qiov, pattern_buf, count);
  75
  76     blk_aio_preadv(blk, offset, &qiov, 0, blk_rw_done, &async_ret);
  77     while (async_ret == NOT_DONE) {
  78         main_loop_wait(false);
  79     }
  80
  81     if (expect_failed) {
  82         g_assert(async_ret != 0);
  83     } else {
  84         g_assert(async_ret == 0);
  85         if (pattern) {
  86             g_assert(memcmp(pattern_buf + pattern_offset,
  87                             cmp_buf, pattern_count) <= 0);
  88         }
  89     }
  90
  91     g_free(pattern_buf);
  92     g_free(cmp_buf);
  93     qemu_iovec_destroy(&qiov);
  94 }
  95
  96 static void test_blk_write(BlockBackend *blk, long pattern, int64_t offset,
  97                            int64_t count, bool expect_failed)
  98 {
  99     void *pattern_buf = NULL;
 100     QEMUIOVector qiov;
 101     int async_ret = NOT_DONE;
 102
 103     pattern_buf = g_malloc(count);
 104     if (pattern) {
 105         memset(pattern_buf, pattern, count);
 106     } else {
 107         memset(pattern_buf, 0x00, count);
 108     }
 109
 110     qemu_iovec_init(&qiov, 1);
 111     qemu_iovec_add(&qiov, pattern_buf, count);
 112
 113     blk_aio_pwritev(blk, offset, &qiov, 0, blk_rw_done, &async_ret);
 114     while (async_ret == NOT_DONE) {
 115         main_loop_wait(false);
 116     }
 117
 118     if (expect_failed) {
 119         g_assert(async_ret != 0);
 120     } else {
 121         g_assert(async_ret == 0);
 122     }
 123
 124     g_free(pattern_buf);
 125     qemu_iovec_destroy(&qiov);
 126 }
 127
 128 /*
 129  * Create a uniquely-named empty temporary file.
 130  */
 131 static void make_temp(char *template)
 132 {
 133     int fd;
 134
 135     fd = mkstemp(template);
 136     g_assert(fd >= 0);
 137     close(fd);
 138 }
 139
 140 static void prepare_imgs(void)
 141 {
 142     make_temp(p_local_disk);
 143     make_temp(s_local_disk);
 144     make_temp(s_active_disk);
 145     make_temp(s_hidden_disk);
 146
 147     /* Primary */
 148     bdrv_img_create(p_local_disk, "qcow2", NULL, NULL, NULL, IMG_SIZE,
 149                     BDRV_O_RDWR, true, &error_abort);
 150
 151     /* Secondary */
 152     bdrv_img_create(s_local_disk, "qcow2", NULL, NULL, NULL, IMG_SIZE,
 153                     BDRV_O_RDWR, true, &error_abort);
 154     bdrv_img_create(s_active_disk, "qcow2", NULL, NULL, NULL, IMG_SIZE,
 155                     BDRV_O_RDWR, true, &error_abort);
 156     bdrv_img_create(s_hidden_disk, "qcow2", NULL, NULL, NULL, IMG_SIZE,
 157                     BDRV_O_RDWR, true, &error_abort);
 158 }
 159
 160 static void cleanup_imgs(void)
 161 {
 162     /* Primary */
 163     unlink(p_local_disk);
 164
 165     /* Secondary */
 166     unlink(s_local_disk);
 167     unlink(s_active_disk);
 168     unlink(s_hidden_disk);
 169 }
 170
 171 static BlockBackend *start_primary(void)
 172 {
 173     BlockBackend *blk;
 174     QemuOpts *opts;
 175     QDict *qdict;
 176     char *cmdline;
 177
 178     cmdline = g_strdup_printf("driver=replication,mode=primary,node-name=xxx,"
 179                               "file.driver=qcow2,file.file.filename=%s,"
 180                               "file.file.locking=off"
 181                               , p_local_disk);
 182     opts = qemu_opts_parse_noisily(&qemu_drive_opts, cmdline, false);
 183     g_free(cmdline);
 184
 185     qdict = qemu_opts_to_qdict(opts, NULL);
 186     qdict_set_default_str(qdict, BDRV_OPT_CACHE_DIRECT, "off");
 187     qdict_set_default_str(qdict, BDRV_OPT_CACHE_NO_FLUSH, "off");
 188
 189     blk = blk_new_open(NULL, NULL, qdict, BDRV_O_RDWR, &error_abort);
 190     g_assert(blk);
 191
 192     monitor_add_blk(blk, P_ID, &error_abort);
 193
 194     qemu_opts_del(opts);
 195
 196     return blk;
 197 }
 198
 199 static void teardown_primary(void)
 200 {
 201     BlockBackend *blk;
 202
 203     /* remove P_ID */
 204     blk = blk_by_name(P_ID);
 205     assert(blk);
 206
 207     monitor_remove_blk(blk);
 208     blk_unref(blk);
 209 }
 210
 211 static void test_primary_read(void)
 212 {
 213     BlockBackend *blk;
 214
 215     blk = start_primary();
 216
 217     /* read from 0 to IMG_SIZE */
 218     test_blk_read(blk, 0, 0, IMG_SIZE, 0, IMG_SIZE, true);
 219
 220     teardown_primary();
 221 }
 222
 223 static void test_primary_write(void)
 224 {
 225     BlockBackend *blk;
 226
 227     blk = start_primary();
 228
 229     /* write from 0 to IMG_SIZE */
 230     test_blk_write(blk, 0, 0, IMG_SIZE, true);
 231
 232     teardown_primary();
 233 }
 234
 235 static void test_primary_start(void)
 236 {
 237     BlockBackend *blk = NULL;
 238
 239     blk = start_primary();
 240
 241     replication_start_all(REPLICATION_MODE_PRIMARY, &error_abort);
 242
 243     /* read from 0 to IMG_SIZE */
 244     test_blk_read(blk, 0, 0, IMG_SIZE, 0, IMG_SIZE, true);
 245
 246     /* write 0x22 from 0 to IMG_SIZE */
 247     test_blk_write(blk, 0x22, 0, IMG_SIZE, false);
 248
 249     teardown_primary();
 250 }
 251
 252 static void test_primary_stop(void)
 253 {
 254     bool failover = true;
 255
 256     start_primary();
 257
 258     replication_start_all(REPLICATION_MODE_PRIMARY, &error_abort);
 259
 260     replication_stop_all(failover, &error_abort);
 261
 262     teardown_primary();
 263 }
 264
 265 static void test_primary_do_checkpoint(void)
 266 {
 267     start_primary();
 268
 269     replication_start_all(REPLICATION_MODE_PRIMARY, &error_abort);
 270
 271     replication_do_checkpoint_all(&error_abort);
 272
 273     teardown_primary();
 274 }
 275
 276 static void test_primary_get_error_all(void)
 277 {
 278     start_primary();
 279
 280     replication_start_all(REPLICATION_MODE_PRIMARY, &error_abort);
 281
 282     replication_get_error_all(&error_abort);
 283
 284     teardown_primary();
 285 }
 286
 287 static BlockBackend *start_secondary(void)
 288 {
 289     QemuOpts *opts;
 290     QDict *qdict;
 291     BlockBackend *blk;
 292     char *cmdline;
 293
 294     /* add s_local_disk and forge S_LOCAL_DISK_ID */
 295     cmdline = g_strdup_printf("file.filename=%s,driver=qcow2,"
 296                               "file.locking=off",
 297                               s_local_disk);
 298     opts = qemu_opts_parse_noisily(&qemu_drive_opts, cmdline, false);
 299     g_free(cmdline);
 300
 301     qdict = qemu_opts_to_qdict(opts, NULL);
 302     qdict_set_default_str(qdict, BDRV_OPT_CACHE_DIRECT, "off");
 303     qdict_set_default_str(qdict, BDRV_OPT_CACHE_NO_FLUSH, "off");
 304
 305     blk = blk_new_open(NULL, NULL, qdict, BDRV_O_RDWR, &error_abort);
 306     assert(blk);
 307     monitor_add_blk(blk, S_LOCAL_DISK_ID, &error_abort);
 308
 309     /* format s_local_disk with pattern "0x11" */
 310     test_blk_write(blk, 0x11, 0, IMG_SIZE, false);
 311
 312     qemu_opts_del(opts);
 313
 314     /* add S_(ACTIVE/HIDDEN)_DISK and forge S_ID */
 315     cmdline = g_strdup_printf("driver=replication,mode=secondary,top-id=%s,"
 316                               "file.driver=qcow2,file.file.filename=%s,"
 317                               "file.file.locking=off,"
 318                               "file.backing.driver=qcow2,"
 319                               "file.backing.file.filename=%s,"
 320                               "file.backing.file.locking=off,"
 321                               "file.backing.backing=%s"
 322                               , S_ID, s_active_disk, s_hidden_disk
 323                               , S_LOCAL_DISK_ID);
 324     opts = qemu_opts_parse_noisily(&qemu_drive_opts, cmdline, false);
 325     g_free(cmdline);
 326
 327     qdict = qemu_opts_to_qdict(opts, NULL);
 328     qdict_set_default_str(qdict, BDRV_OPT_CACHE_DIRECT, "off");
 329     qdict_set_default_str(qdict, BDRV_OPT_CACHE_NO_FLUSH, "off");
 330
 331     blk = blk_new_open(NULL, NULL, qdict, BDRV_O_RDWR, &error_abort);
 332     assert(blk);
 333     monitor_add_blk(blk, S_ID, &error_abort);
 334
 335     qemu_opts_del(opts);
 336
 337     return blk;
 338 }
 339
 340 static void teardown_secondary(void)
 341 {
 342     /* only need to destroy two BBs */
 343     BlockBackend *blk;
 344
 345     /* remove S_LOCAL_DISK_ID */
 346     blk = blk_by_name(S_LOCAL_DISK_ID);
 347     assert(blk);
 348
 349     monitor_remove_blk(blk);
 350     blk_unref(blk);
 351
 352     /* remove S_ID */
 353     blk = blk_by_name(S_ID);
 354     assert(blk);
 355
 356     monitor_remove_blk(blk);
 357     blk_unref(blk);
 358 }
 359
 360 static void test_secondary_read(void)
 361 {
 362     BlockBackend *blk;
 363
 364     blk = start_secondary();
 365
 366     /* read from 0 to IMG_SIZE */
 367     test_blk_read(blk, 0, 0, IMG_SIZE, 0, IMG_SIZE, true);
 368
 369     teardown_secondary();
 370 }
 371
 372 static void test_secondary_write(void)
 373 {
 374     BlockBackend *blk;
 375
 376     blk = start_secondary();
 377
 378     /* write from 0 to IMG_SIZE */
 379     test_blk_write(blk, 0, 0, IMG_SIZE, true);
 380
 381     teardown_secondary();
 382 }
 383
 384 #ifndef _WIN32
 385 static void test_secondary_start(void)
 386 {
 387     BlockBackend *top_blk, *local_blk;
 388     bool failover = true;
 389
 390     top_blk = start_secondary();
 391     replication_start_all(REPLICATION_MODE_SECONDARY, &error_abort);
 392
 393     /* read from s_local_disk (0, IMG_SIZE) */
 394     test_blk_read(top_blk, 0x11, 0, IMG_SIZE, 0, IMG_SIZE, false);
 395
 396     /* write 0x22 to s_local_disk (IMG_SIZE / 2, IMG_SIZE) */
 397     local_blk = blk_by_name(S_LOCAL_DISK_ID);
 398     test_blk_write(local_blk, 0x22, IMG_SIZE / 2, IMG_SIZE / 2, false);
 399
 400     /* replication will backup s_local_disk to s_hidden_disk */
 401     test_blk_read(top_blk, 0x11, IMG_SIZE / 2,
 402                   IMG_SIZE / 2, 0, IMG_SIZE, false);
 403
 404     /* write 0x33 to s_active_disk (0, IMG_SIZE / 2) */
 405     test_blk_write(top_blk, 0x33, 0, IMG_SIZE / 2, false);
 406
 407     /* read from s_active_disk (0, IMG_SIZE/2) */
 408     test_blk_read(top_blk, 0x33, 0, IMG_SIZE / 2,
 409                   0, IMG_SIZE / 2, false);
 410
 411     /* unblock top_bs */
 412     replication_stop_all(failover, &error_abort);
 413
 414     teardown_secondary();
 415 }
 416
 417
 418 static void test_secondary_stop(void)
 419 {
 420     BlockBackend *top_blk, *local_blk;
 421     bool failover = true;
 422
 423     top_blk = start_secondary();
 424     replication_start_all(REPLICATION_MODE_SECONDARY, &error_abort);
 425
 426     /* write 0x22 to s_local_disk (IMG_SIZE / 2, IMG_SIZE) */
 427     local_blk = blk_by_name(S_LOCAL_DISK_ID);
 428     test_blk_write(local_blk, 0x22, IMG_SIZE / 2, IMG_SIZE / 2, false);
 429
 430     /* replication will backup s_local_disk to s_hidden_disk */
 431     test_blk_read(top_blk, 0x11, IMG_SIZE / 2,
 432                   IMG_SIZE / 2, 0, IMG_SIZE, false);
 433
 434     /* write 0x33 to s_active_disk (0, IMG_SIZE / 2) */
 435     test_blk_write(top_blk, 0x33, 0, IMG_SIZE / 2, false);
 436
 437     /* do active commit */
 438     replication_stop_all(failover, &error_abort);
 439
 440     /* read from s_local_disk (0, IMG_SIZE / 2) */
 441     test_blk_read(top_blk, 0x33, 0, IMG_SIZE / 2,
 442                   0, IMG_SIZE / 2, false);
 443
 444
 445     /* read from s_local_disk (IMG_SIZE / 2, IMG_SIZE) */
 446     test_blk_read(top_blk, 0x22, IMG_SIZE / 2,
 447                   IMG_SIZE / 2, 0, IMG_SIZE, false);
 448
 449     teardown_secondary();
 450 }
 451
 452 static void test_secondary_continuous_replication(void)
 453 {
 454     BlockBackend *top_blk, *local_blk;
 455
 456     top_blk = start_secondary();
 457     replication_start_all(REPLICATION_MODE_SECONDARY, &error_abort);
 458
 459     /* write 0x22 to s_local_disk (IMG_SIZE / 2, IMG_SIZE) */
 460     local_blk = blk_by_name(S_LOCAL_DISK_ID);
 461     test_blk_write(local_blk, 0x22, IMG_SIZE / 2, IMG_SIZE / 2, false);
 462
 463     /* replication will backup s_local_disk to s_hidden_disk */
 464     test_blk_read(top_blk, 0x11, IMG_SIZE / 2,
 465                   IMG_SIZE / 2, 0, IMG_SIZE, false);
 466
 467     /* write 0x33 to s_active_disk (0, IMG_SIZE / 2) */
 468     test_blk_write(top_blk, 0x33, 0, IMG_SIZE / 2, false);
 469
 470     /* do failover (active commit) */
 471     replication_stop_all(true, &error_abort);
 472
 473     /* it should ignore all requests from now on */
 474
 475     /* start after failover */
 476     replication_start_all(REPLICATION_MODE_PRIMARY, &error_abort);
 477
 478     /* checkpoint */
 479     replication_do_checkpoint_all(&error_abort);
 480
 481     /* stop */
 482     replication_stop_all(true, &error_abort);
 483
 484     /* read from s_local_disk (0, IMG_SIZE / 2) */
 485     test_blk_read(top_blk, 0x33, 0, IMG_SIZE / 2,
 486                   0, IMG_SIZE / 2, false);
 487
 488
 489     /* read from s_local_disk (IMG_SIZE / 2, IMG_SIZE) */
 490     test_blk_read(top_blk, 0x22, IMG_SIZE / 2,
 491                   IMG_SIZE / 2, 0, IMG_SIZE, false);
 492
 493     teardown_secondary();
 494 }
 495
 496 static void test_secondary_do_checkpoint(void)
 497 {
 498     BlockBackend *top_blk, *local_blk;
 499     bool failover = true;
 500
 501     top_blk = start_secondary();
 502     replication_start_all(REPLICATION_MODE_SECONDARY, &error_abort);
 503
 504     /* write 0x22 to s_local_disk (IMG_SIZE / 2, IMG_SIZE) */
 505     local_blk = blk_by_name(S_LOCAL_DISK_ID);
 506     test_blk_write(local_blk, 0x22, IMG_SIZE / 2,
 507                    IMG_SIZE / 2, false);
 508
 509     /* replication will backup s_local_disk to s_hidden_disk */
 510     test_blk_read(top_blk, 0x11, IMG_SIZE / 2,
 511                   IMG_SIZE / 2, 0, IMG_SIZE, false);
 512
 513     replication_do_checkpoint_all(&error_abort);
 514
 515     /* after checkpoint, read pattern 0x22 from s_local_disk */
 516     test_blk_read(top_blk, 0x22, IMG_SIZE / 2,
 517                   IMG_SIZE / 2, 0, IMG_SIZE, false);
 518
 519     /* unblock top_bs */
 520     replication_stop_all(failover, &error_abort);
 521
 522     teardown_secondary();
 523 }
 524
 525 static void test_secondary_get_error_all(void)
 526 {
 527     bool failover = true;
 528
 529     start_secondary();
 530     replication_start_all(REPLICATION_MODE_SECONDARY, &error_abort);
 531
 532     replication_get_error_all(&error_abort);
 533
 534     /* unblock top_bs */
 535     replication_stop_all(failover, &error_abort);
 536
 537     teardown_secondary();
 538 }
 539 #endif
 540
 541 static void sigabrt_handler(int signo)
 542 {
 543     cleanup_imgs();
 544 }
 545
 546 static void setup_sigabrt_handler(void)
 547 {
 548 #ifdef _WIN32
 549     signal(SIGABRT, sigabrt_handler);
 550 #else
 551     struct sigaction sigact;
 552
 553     sigact = (struct sigaction) {
 554         .sa_handler = sigabrt_handler,
 555         .sa_flags = SA_RESETHAND,
 556     };
 557     sigemptyset(&sigact.sa_mask);
 558     sigaction(SIGABRT, &sigact, NULL);
 559 #endif
 560 }
 561
 562 int main(int argc, char **argv)
 563 {
 564     int ret;
 565     const char *tmpdir = g_get_tmp_dir();
 566     p_local_disk = g_strdup_printf("%s/p_local_disk.XXXXXX", tmpdir);
 567     s_local_disk = g_strdup_printf("%s/s_local_disk.XXXXXX", tmpdir);
 568     s_active_disk = g_strdup_printf("%s/s_active_disk.XXXXXX", tmpdir);
 569     s_hidden_disk = g_strdup_printf("%s/s_hidden_disk.XXXXXX", tmpdir);
 570     qemu_init_main_loop(&error_fatal);
 571     bdrv_init();
 572
 573     g_test_init(&argc, &argv, NULL);
 574     setup_sigabrt_handler();
 575
 576     prepare_imgs();
 577
 578     /* Primary */
 579     g_test_add_func("/replication/primary/read",    test_primary_read);
 580     g_test_add_func("/replication/primary/write",   test_primary_write);
 581     g_test_add_func("/replication/primary/start",   test_primary_start);
 582     g_test_add_func("/replication/primary/stop",    test_primary_stop);
 583     g_test_add_func("/replication/primary/do_checkpoint",
 584                     test_primary_do_checkpoint);
 585     g_test_add_func("/replication/primary/get_error_all",
 586                     test_primary_get_error_all);
 587
 588     /* Secondary */
 589     g_test_add_func("/replication/secondary/read",  test_secondary_read);
 590     g_test_add_func("/replication/secondary/write", test_secondary_write);
 591 #ifndef _WIN32
 592     g_test_add_func("/replication/secondary/start", test_secondary_start);
 593     g_test_add_func("/replication/secondary/stop",  test_secondary_stop);
 594     g_test_add_func("/replication/secondary/continuous_replication",
 595                     test_secondary_continuous_replication);
 596     g_test_add_func("/replication/secondary/do_checkpoint",
 597                     test_secondary_do_checkpoint);
 598     g_test_add_func("/replication/secondary/get_error_all",
 599                     test_secondary_get_error_all);
 600 #endif
 601
 602     ret = g_test_run();
 603
 604     cleanup_imgs();
 605
 606     g_free(p_local_disk);
 607     g_free(s_local_disk);
 608     g_free(s_active_disk);
 609     g_free(s_hidden_disk);
 610
 611     return ret;
 612 }