tests/test-block-iothread.c

   1 /*
   2  * Block tests for iothreads
   3  *
   4  * Copyright (c) 2018 Kevin Wolf <kwolf@redhat.com>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include "qemu/osdep.h"
  26 #include "block/block.h"
  27 #include "block/blockjob_int.h"
  28 #include "sysemu/block-backend.h"
  29 #include "qapi/error.h"
  30 #include "qapi/qmp/qdict.h"
  31 #include "qemu/main-loop.h"
  32 #include "iothread.h"
  33
  34 static int coroutine_fn bdrv_test_co_prwv(BlockDriverState *bs,
  35                                           uint64_t offset, uint64_t bytes,
  36                                           QEMUIOVector *qiov, int flags)
  37 {
  38     return 0;
  39 }
  40
  41 static int coroutine_fn bdrv_test_co_pdiscard(BlockDriverState *bs,
  42                                               int64_t offset, int bytes)
  43 {
  44     return 0;
  45 }
  46
  47 static int coroutine_fn
  48 bdrv_test_co_truncate(BlockDriverState *bs, int64_t offset, bool exact,
  49                       PreallocMode prealloc, Error **errp)
  50 {
  51     return 0;
  52 }
  53
  54 static int coroutine_fn bdrv_test_co_block_status(BlockDriverState *bs,
  55                                                   bool want_zero,
  56                                                   int64_t offset, int64_t count,
  57                                                   int64_t *pnum, int64_t *map,
  58                                                   BlockDriverState **file)
  59 {
  60     *pnum = count;
  61     return 0;
  62 }
  63
  64 static BlockDriver bdrv_test = {
  65     .format_name            = "test",
  66     .instance_size          = 1,
  67
  68     .bdrv_co_preadv         = bdrv_test_co_prwv,
  69     .bdrv_co_pwritev        = bdrv_test_co_prwv,
  70     .bdrv_co_pdiscard       = bdrv_test_co_pdiscard,
  71     .bdrv_co_truncate       = bdrv_test_co_truncate,
  72     .bdrv_co_block_status   = bdrv_test_co_block_status,
  73 };
  74
  75 static void test_sync_op_pread(BdrvChild *c)
  76 {
  77     uint8_t buf[512];
  78     int ret;
  79
  80     /* Success */
  81     ret = bdrv_pread(c, 0, buf, sizeof(buf));
  82     g_assert_cmpint(ret, ==, 512);
  83
  84     /* Early error: Negative offset */
  85     ret = bdrv_pread(c, -2, buf, sizeof(buf));
  86     g_assert_cmpint(ret, ==, -EIO);
  87 }
  88
  89 static void test_sync_op_pwrite(BdrvChild *c)
  90 {
  91     uint8_t buf[512];
  92     int ret;
  93
  94     /* Success */
  95     ret = bdrv_pwrite(c, 0, buf, sizeof(buf));
  96     g_assert_cmpint(ret, ==, 512);
  97
  98     /* Early error: Negative offset */
  99     ret = bdrv_pwrite(c, -2, buf, sizeof(buf));
 100     g_assert_cmpint(ret, ==, -EIO);
 101 }
 102
 103 static void test_sync_op_blk_pread(BlockBackend *blk)
 104 {
 105     uint8_t buf[512];
 106     int ret;
 107
 108     /* Success */
 109     ret = blk_pread(blk, 0, buf, sizeof(buf));
 110     g_assert_cmpint(ret, ==, 512);
 111
 112     /* Early error: Negative offset */
 113     ret = blk_pread(blk, -2, buf, sizeof(buf));
 114     g_assert_cmpint(ret, ==, -EIO);
 115 }
 116
 117 static void test_sync_op_blk_pwrite(BlockBackend *blk)
 118 {
 119     uint8_t buf[512];
 120     int ret;
 121
 122     /* Success */
 123     ret = blk_pwrite(blk, 0, buf, sizeof(buf), 0);
 124     g_assert_cmpint(ret, ==, 512);
 125
 126     /* Early error: Negative offset */
 127     ret = blk_pwrite(blk, -2, buf, sizeof(buf), 0);
 128     g_assert_cmpint(ret, ==, -EIO);
 129 }
 130
 131 static void test_sync_op_load_vmstate(BdrvChild *c)
 132 {
 133     uint8_t buf[512];
 134     int ret;
 135
 136     /* Error: Driver does not support snapshots */
 137     ret = bdrv_load_vmstate(c->bs, buf, 0, sizeof(buf));
 138     g_assert_cmpint(ret, ==, -ENOTSUP);
 139 }
 140
 141 static void test_sync_op_save_vmstate(BdrvChild *c)
 142 {
 143     uint8_t buf[512];
 144     int ret;
 145
 146     /* Error: Driver does not support snapshots */
 147     ret = bdrv_save_vmstate(c->bs, buf, 0, sizeof(buf));
 148     g_assert_cmpint(ret, ==, -ENOTSUP);
 149 }
 150
 151 static void test_sync_op_pdiscard(BdrvChild *c)
 152 {
 153     int ret;
 154
 155     /* Normal success path */
 156     c->bs->open_flags |= BDRV_O_UNMAP;
 157     ret = bdrv_pdiscard(c, 0, 512);
 158     g_assert_cmpint(ret, ==, 0);
 159
 160     /* Early success: UNMAP not supported */
 161     c->bs->open_flags &= ~BDRV_O_UNMAP;
 162     ret = bdrv_pdiscard(c, 0, 512);
 163     g_assert_cmpint(ret, ==, 0);
 164
 165     /* Early error: Negative offset */
 166     ret = bdrv_pdiscard(c, -2, 512);
 167     g_assert_cmpint(ret, ==, -EIO);
 168 }
 169
 170 static void test_sync_op_blk_pdiscard(BlockBackend *blk)
 171 {
 172     int ret;
 173
 174     /* Early success: UNMAP not supported */
 175     ret = blk_pdiscard(blk, 0, 512);
 176     g_assert_cmpint(ret, ==, 0);
 177
 178     /* Early error: Negative offset */
 179     ret = blk_pdiscard(blk, -2, 512);
 180     g_assert_cmpint(ret, ==, -EIO);
 181 }
 182
 183 static void test_sync_op_truncate(BdrvChild *c)
 184 {
 185     int ret;
 186
 187     /* Normal success path */
 188     ret = bdrv_truncate(c, 65536, false, PREALLOC_MODE_OFF, NULL);
 189     g_assert_cmpint(ret, ==, 0);
 190
 191     /* Early error: Negative offset */
 192     ret = bdrv_truncate(c, -2, false, PREALLOC_MODE_OFF, NULL);
 193     g_assert_cmpint(ret, ==, -EINVAL);
 194
 195     /* Error: Read-only image */
 196     c->bs->read_only = true;
 197     c->bs->open_flags &= ~BDRV_O_RDWR;
 198
 199     ret = bdrv_truncate(c, 65536, false, PREALLOC_MODE_OFF, NULL);
 200     g_assert_cmpint(ret, ==, -EACCES);
 201
 202     c->bs->read_only = false;
 203     c->bs->open_flags |= BDRV_O_RDWR;
 204 }
 205
 206 static void test_sync_op_block_status(BdrvChild *c)
 207 {
 208     int ret;
 209     int64_t n;
 210
 211     /* Normal success path */
 212     ret = bdrv_is_allocated(c->bs, 0, 65536, &n);
 213     g_assert_cmpint(ret, ==, 0);
 214
 215     /* Early success: No driver support */
 216     bdrv_test.bdrv_co_block_status = NULL;
 217     ret = bdrv_is_allocated(c->bs, 0, 65536, &n);
 218     g_assert_cmpint(ret, ==, 1);
 219
 220     /* Early success: bytes = 0 */
 221     ret = bdrv_is_allocated(c->bs, 0, 0, &n);
 222     g_assert_cmpint(ret, ==, 0);
 223
 224     /* Early success: Offset > image size*/
 225     ret = bdrv_is_allocated(c->bs, 0x1000000, 0x1000000, &n);
 226     g_assert_cmpint(ret, ==, 0);
 227 }
 228
 229 static void test_sync_op_flush(BdrvChild *c)
 230 {
 231     int ret;
 232
 233     /* Normal success path */
 234     ret = bdrv_flush(c->bs);
 235     g_assert_cmpint(ret, ==, 0);
 236
 237     /* Early success: Read-only image */
 238     c->bs->read_only = true;
 239     c->bs->open_flags &= ~BDRV_O_RDWR;
 240
 241     ret = bdrv_flush(c->bs);
 242     g_assert_cmpint(ret, ==, 0);
 243
 244     c->bs->read_only = false;
 245     c->bs->open_flags |= BDRV_O_RDWR;
 246 }
 247
 248 static void test_sync_op_blk_flush(BlockBackend *blk)
 249 {
 250     BlockDriverState *bs = blk_bs(blk);
 251     int ret;
 252
 253     /* Normal success path */
 254     ret = blk_flush(blk);
 255     g_assert_cmpint(ret, ==, 0);
 256
 257     /* Early success: Read-only image */
 258     bs->read_only = true;
 259     bs->open_flags &= ~BDRV_O_RDWR;
 260
 261     ret = blk_flush(blk);
 262     g_assert_cmpint(ret, ==, 0);
 263
 264     bs->read_only = false;
 265     bs->open_flags |= BDRV_O_RDWR;
 266 }
 267
 268 static void test_sync_op_check(BdrvChild *c)
 269 {
 270     BdrvCheckResult result;
 271     int ret;
 272
 273     /* Error: Driver does not implement check */
 274     ret = bdrv_check(c->bs, &result, 0);
 275     g_assert_cmpint(ret, ==, -ENOTSUP);
 276 }
 277
 278 static void test_sync_op_invalidate_cache(BdrvChild *c)
 279 {
 280     /* Early success: Image is not inactive */
 281     bdrv_invalidate_cache(c->bs, NULL);
 282 }
 283
 284
 285 typedef struct SyncOpTest {
 286     const char *name;
 287     void (*fn)(BdrvChild *c);
 288     void (*blkfn)(BlockBackend *blk);
 289 } SyncOpTest;
 290
 291 const SyncOpTest sync_op_tests[] = {
 292     {
 293         .name   = "/sync-op/pread",
 294         .fn     = test_sync_op_pread,
 295         .blkfn  = test_sync_op_blk_pread,
 296     }, {
 297         .name   = "/sync-op/pwrite",
 298         .fn     = test_sync_op_pwrite,
 299         .blkfn  = test_sync_op_blk_pwrite,
 300     }, {
 301         .name   = "/sync-op/load_vmstate",
 302         .fn     = test_sync_op_load_vmstate,
 303     }, {
 304         .name   = "/sync-op/save_vmstate",
 305         .fn     = test_sync_op_save_vmstate,
 306     }, {
 307         .name   = "/sync-op/pdiscard",
 308         .fn     = test_sync_op_pdiscard,
 309         .blkfn  = test_sync_op_blk_pdiscard,
 310     }, {
 311         .name   = "/sync-op/truncate",
 312         .fn     = test_sync_op_truncate,
 313     }, {
 314         .name   = "/sync-op/block_status",
 315         .fn     = test_sync_op_block_status,
 316     }, {
 317         .name   = "/sync-op/flush",
 318         .fn     = test_sync_op_flush,
 319         .blkfn  = test_sync_op_blk_flush,
 320     }, {
 321         .name   = "/sync-op/check",
 322         .fn     = test_sync_op_check,
 323     }, {
 324         .name   = "/sync-op/invalidate_cache",
 325         .fn     = test_sync_op_invalidate_cache,
 326     },
 327 };
 328
 329 /* Test synchronous operations that run in a different iothread, so we have to
 330  * poll for the coroutine there to return. */
 331 static void test_sync_op(const void *opaque)
 332 {
 333     const SyncOpTest *t = opaque;
 334     IOThread *iothread = iothread_new();
 335     AioContext *ctx = iothread_get_aio_context(iothread);
 336     BlockBackend *blk;
 337     BlockDriverState *bs;
 338     BdrvChild *c;
 339
 340     blk = blk_new(qemu_get_aio_context(), BLK_PERM_ALL, BLK_PERM_ALL);
 341     bs = bdrv_new_open_driver(&bdrv_test, "base", BDRV_O_RDWR, &error_abort);
 342     bs->total_sectors = 65536 / BDRV_SECTOR_SIZE;
 343     blk_insert_bs(blk, bs, &error_abort);
 344     c = QLIST_FIRST(&bs->parents);
 345
 346     blk_set_aio_context(blk, ctx, &error_abort);
 347     aio_context_acquire(ctx);
 348     t->fn(c);
 349     if (t->blkfn) {
 350         t->blkfn(blk);
 351     }
 352     blk_set_aio_context(blk, qemu_get_aio_context(), &error_abort);
 353     aio_context_release(ctx);
 354
 355     bdrv_unref(bs);
 356     blk_unref(blk);
 357 }
 358
 359 typedef struct TestBlockJob {
 360     BlockJob common;
 361     bool should_complete;
 362     int n;
 363 } TestBlockJob;
 364
 365 static int test_job_prepare(Job *job)
 366 {
 367     g_assert(qemu_get_current_aio_context() == qemu_get_aio_context());
 368     return 0;
 369 }
 370
 371 static int coroutine_fn test_job_run(Job *job, Error **errp)
 372 {
 373     TestBlockJob *s = container_of(job, TestBlockJob, common.job);
 374
 375     job_transition_to_ready(&s->common.job);
 376     while (!s->should_complete) {
 377         s->n++;
 378         g_assert(qemu_get_current_aio_context() == job->aio_context);
 379
 380         /* Avoid job_sleep_ns() because it marks the job as !busy. We want to
 381          * emulate some actual activity (probably some I/O) here so that the
 382          * drain involved in AioContext switches has to wait for this activity
 383          * to stop. */
 384         qemu_co_sleep_ns(QEMU_CLOCK_REALTIME, 1000000);
 385
 386         job_pause_point(&s->common.job);
 387     }
 388
 389     g_assert(qemu_get_current_aio_context() == job->aio_context);
 390     return 0;
 391 }
 392
 393 static void test_job_complete(Job *job, Error **errp)
 394 {
 395     TestBlockJob *s = container_of(job, TestBlockJob, common.job);
 396     s->should_complete = true;
 397 }
 398
 399 BlockJobDriver test_job_driver = {
 400     .job_driver = {
 401         .instance_size  = sizeof(TestBlockJob),
 402         .free           = block_job_free,
 403         .user_resume    = block_job_user_resume,
 404         .run            = test_job_run,
 405         .complete       = test_job_complete,
 406         .prepare        = test_job_prepare,
 407     },
 408 };
 409
 410 static void test_attach_blockjob(void)
 411 {
 412     IOThread *iothread = iothread_new();
 413     AioContext *ctx = iothread_get_aio_context(iothread);
 414     BlockBackend *blk;
 415     BlockDriverState *bs;
 416     TestBlockJob *tjob;
 417
 418     blk = blk_new(qemu_get_aio_context(), BLK_PERM_ALL, BLK_PERM_ALL);
 419     bs = bdrv_new_open_driver(&bdrv_test, "base", BDRV_O_RDWR, &error_abort);
 420     blk_insert_bs(blk, bs, &error_abort);
 421
 422     tjob = block_job_create("job0", &test_job_driver, NULL, bs,
 423                             0, BLK_PERM_ALL,
 424                             0, 0, NULL, NULL, &error_abort);
 425     job_start(&tjob->common.job);
 426
 427     while (tjob->n == 0) {
 428         aio_poll(qemu_get_aio_context(), false);
 429     }
 430
 431     blk_set_aio_context(blk, ctx, &error_abort);
 432
 433     tjob->n = 0;
 434     while (tjob->n == 0) {
 435         aio_poll(qemu_get_aio_context(), false);
 436     }
 437
 438     aio_context_acquire(ctx);
 439     blk_set_aio_context(blk, qemu_get_aio_context(), &error_abort);
 440     aio_context_release(ctx);
 441
 442     tjob->n = 0;
 443     while (tjob->n == 0) {
 444         aio_poll(qemu_get_aio_context(), false);
 445     }
 446
 447     blk_set_aio_context(blk, ctx, &error_abort);
 448
 449     tjob->n = 0;
 450     while (tjob->n == 0) {
 451         aio_poll(qemu_get_aio_context(), false);
 452     }
 453
 454     aio_context_acquire(ctx);
 455     job_complete_sync(&tjob->common.job, &error_abort);
 456     blk_set_aio_context(blk, qemu_get_aio_context(), &error_abort);
 457     aio_context_release(ctx);
 458
 459     bdrv_unref(bs);
 460     blk_unref(blk);
 461 }
 462
 463 /*
 464  * Test that changing the AioContext for one node in a tree (here through blk)
 465  * changes all other nodes as well:
 466  *
 467  *  blk
 468  *   |
 469  *   |  bs_verify [blkverify]
 470  *   |   /               \
 471  *   |  /                 \
 472  *  bs_a [bdrv_test]    bs_b [bdrv_test]
 473  *
 474  */
 475 static void test_propagate_basic(void)
 476 {
 477     IOThread *iothread = iothread_new();
 478     AioContext *ctx = iothread_get_aio_context(iothread);
 479     AioContext *main_ctx;
 480     BlockBackend *blk;
 481     BlockDriverState *bs_a, *bs_b, *bs_verify;
 482     QDict *options;
 483
 484     /* Create bs_a and its BlockBackend */
 485     blk = blk_new(qemu_get_aio_context(), BLK_PERM_ALL, BLK_PERM_ALL);
 486     bs_a = bdrv_new_open_driver(&bdrv_test, "bs_a", BDRV_O_RDWR, &error_abort);
 487     blk_insert_bs(blk, bs_a, &error_abort);
 488
 489     /* Create bs_b */
 490     bs_b = bdrv_new_open_driver(&bdrv_test, "bs_b", BDRV_O_RDWR, &error_abort);
 491
 492     /* Create blkverify filter that references both bs_a and bs_b */
 493     options = qdict_new();
 494     qdict_put_str(options, "driver", "blkverify");
 495     qdict_put_str(options, "test", "bs_a");
 496     qdict_put_str(options, "raw", "bs_b");
 497
 498     bs_verify = bdrv_open(NULL, NULL, options, BDRV_O_RDWR, &error_abort);
 499
 500     /* Switch the AioContext */
 501     blk_set_aio_context(blk, ctx, &error_abort);
 502     g_assert(blk_get_aio_context(blk) == ctx);
 503     g_assert(bdrv_get_aio_context(bs_a) == ctx);
 504     g_assert(bdrv_get_aio_context(bs_verify) == ctx);
 505     g_assert(bdrv_get_aio_context(bs_b) == ctx);
 506
 507     /* Switch the AioContext back */
 508     main_ctx = qemu_get_aio_context();
 509     aio_context_acquire(ctx);
 510     blk_set_aio_context(blk, main_ctx, &error_abort);
 511     aio_context_release(ctx);
 512     g_assert(blk_get_aio_context(blk) == main_ctx);
 513     g_assert(bdrv_get_aio_context(bs_a) == main_ctx);
 514     g_assert(bdrv_get_aio_context(bs_verify) == main_ctx);
 515     g_assert(bdrv_get_aio_context(bs_b) == main_ctx);
 516
 517     bdrv_unref(bs_verify);
 518     bdrv_unref(bs_b);
 519     bdrv_unref(bs_a);
 520     blk_unref(blk);
 521 }
 522
 523 /*
 524  * Test that diamonds in the graph don't lead to endless recursion:
 525  *
 526  *              blk
 527  *               |
 528  *      bs_verify [blkverify]
 529  *       /              \
 530  *      /                \
 531  *   bs_b [raw]         bs_c[raw]
 532  *      \                /
 533  *       \              /
 534  *       bs_a [bdrv_test]
 535  */
 536 static void test_propagate_diamond(void)
 537 {
 538     IOThread *iothread = iothread_new();
 539     AioContext *ctx = iothread_get_aio_context(iothread);
 540     AioContext *main_ctx;
 541     BlockBackend *blk;
 542     BlockDriverState *bs_a, *bs_b, *bs_c, *bs_verify;
 543     QDict *options;
 544
 545     /* Create bs_a */
 546     bs_a = bdrv_new_open_driver(&bdrv_test, "bs_a", BDRV_O_RDWR, &error_abort);
 547
 548     /* Create bs_b and bc_c */
 549     options = qdict_new();
 550     qdict_put_str(options, "driver", "raw");
 551     qdict_put_str(options, "file", "bs_a");
 552     qdict_put_str(options, "node-name", "bs_b");
 553     bs_b = bdrv_open(NULL, NULL, options, BDRV_O_RDWR, &error_abort);
 554
 555     options = qdict_new();
 556     qdict_put_str(options, "driver", "raw");
 557     qdict_put_str(options, "file", "bs_a");
 558     qdict_put_str(options, "node-name", "bs_c");
 559     bs_c = bdrv_open(NULL, NULL, options, BDRV_O_RDWR, &error_abort);
 560
 561     /* Create blkverify filter that references both bs_b and bs_c */
 562     options = qdict_new();
 563     qdict_put_str(options, "driver", "blkverify");
 564     qdict_put_str(options, "test", "bs_b");
 565     qdict_put_str(options, "raw", "bs_c");
 566
 567     bs_verify = bdrv_open(NULL, NULL, options, BDRV_O_RDWR, &error_abort);
 568     blk = blk_new(qemu_get_aio_context(), BLK_PERM_ALL, BLK_PERM_ALL);
 569     blk_insert_bs(blk, bs_verify, &error_abort);
 570
 571     /* Switch the AioContext */
 572     blk_set_aio_context(blk, ctx, &error_abort);
 573     g_assert(blk_get_aio_context(blk) == ctx);
 574     g_assert(bdrv_get_aio_context(bs_verify) == ctx);
 575     g_assert(bdrv_get_aio_context(bs_a) == ctx);
 576     g_assert(bdrv_get_aio_context(bs_b) == ctx);
 577     g_assert(bdrv_get_aio_context(bs_c) == ctx);
 578
 579     /* Switch the AioContext back */
 580     main_ctx = qemu_get_aio_context();
 581     aio_context_acquire(ctx);
 582     blk_set_aio_context(blk, main_ctx, &error_abort);
 583     aio_context_release(ctx);
 584     g_assert(blk_get_aio_context(blk) == main_ctx);
 585     g_assert(bdrv_get_aio_context(bs_verify) == main_ctx);
 586     g_assert(bdrv_get_aio_context(bs_a) == main_ctx);
 587     g_assert(bdrv_get_aio_context(bs_b) == main_ctx);
 588     g_assert(bdrv_get_aio_context(bs_c) == main_ctx);
 589
 590     blk_unref(blk);
 591     bdrv_unref(bs_verify);
 592     bdrv_unref(bs_c);
 593     bdrv_unref(bs_b);
 594     bdrv_unref(bs_a);
 595 }
 596
 597 static void test_propagate_mirror(void)
 598 {
 599     IOThread *iothread = iothread_new();
 600     AioContext *ctx = iothread_get_aio_context(iothread);
 601     AioContext *main_ctx = qemu_get_aio_context();
 602     BlockDriverState *src, *target, *filter;
 603     BlockBackend *blk;
 604     Job *job;
 605     Error *local_err = NULL;
 606
 607     /* Create src and target*/
 608     src = bdrv_new_open_driver(&bdrv_test, "src", BDRV_O_RDWR, &error_abort);
 609     target = bdrv_new_open_driver(&bdrv_test, "target", BDRV_O_RDWR,
 610                                   &error_abort);
 611
 612     /* Start a mirror job */
 613     mirror_start("job0", src, target, NULL, JOB_DEFAULT, 0, 0, 0,
 614                  MIRROR_SYNC_MODE_NONE, MIRROR_OPEN_BACKING_CHAIN, false,
 615                  BLOCKDEV_ON_ERROR_REPORT, BLOCKDEV_ON_ERROR_REPORT,
 616                  false, "filter_node", MIRROR_COPY_MODE_BACKGROUND,
 617                  &error_abort);
 618     job = job_get("job0");
 619     filter = bdrv_find_node("filter_node");
 620
 621     /* Change the AioContext of src */
 622     bdrv_try_set_aio_context(src, ctx, &error_abort);
 623     g_assert(bdrv_get_aio_context(src) == ctx);
 624     g_assert(bdrv_get_aio_context(target) == ctx);
 625     g_assert(bdrv_get_aio_context(filter) == ctx);
 626     g_assert(job->aio_context == ctx);
 627
 628     /* Change the AioContext of target */
 629     aio_context_acquire(ctx);
 630     bdrv_try_set_aio_context(target, main_ctx, &error_abort);
 631     aio_context_release(ctx);
 632     g_assert(bdrv_get_aio_context(src) == main_ctx);
 633     g_assert(bdrv_get_aio_context(target) == main_ctx);
 634     g_assert(bdrv_get_aio_context(filter) == main_ctx);
 635
 636     /* With a BlockBackend on src, changing target must fail */
 637     blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL);
 638     blk_insert_bs(blk, src, &error_abort);
 639
 640     bdrv_try_set_aio_context(target, ctx, &local_err);
 641     g_assert(local_err);
 642     error_free(local_err);
 643
 644     g_assert(blk_get_aio_context(blk) == main_ctx);
 645     g_assert(bdrv_get_aio_context(src) == main_ctx);
 646     g_assert(bdrv_get_aio_context(target) == main_ctx);
 647     g_assert(bdrv_get_aio_context(filter) == main_ctx);
 648
 649     /* ...unless we explicitly allow it */
 650     aio_context_acquire(ctx);
 651     blk_set_allow_aio_context_change(blk, true);
 652     bdrv_try_set_aio_context(target, ctx, &error_abort);
 653     aio_context_release(ctx);
 654
 655     g_assert(blk_get_aio_context(blk) == ctx);
 656     g_assert(bdrv_get_aio_context(src) == ctx);
 657     g_assert(bdrv_get_aio_context(target) == ctx);
 658     g_assert(bdrv_get_aio_context(filter) == ctx);
 659
 660     job_cancel_sync_all();
 661
 662     aio_context_acquire(ctx);
 663     blk_set_aio_context(blk, main_ctx, &error_abort);
 664     bdrv_try_set_aio_context(target, main_ctx, &error_abort);
 665     aio_context_release(ctx);
 666
 667     blk_unref(blk);
 668     bdrv_unref(src);
 669     bdrv_unref(target);
 670 }
 671
 672 static void test_attach_second_node(void)
 673 {
 674     IOThread *iothread = iothread_new();
 675     AioContext *ctx = iothread_get_aio_context(iothread);
 676     AioContext *main_ctx = qemu_get_aio_context();
 677     BlockBackend *blk;
 678     BlockDriverState *bs, *filter;
 679     QDict *options;
 680
 681     blk = blk_new(ctx, BLK_PERM_ALL, BLK_PERM_ALL);
 682     bs = bdrv_new_open_driver(&bdrv_test, "base", BDRV_O_RDWR, &error_abort);
 683     blk_insert_bs(blk, bs, &error_abort);
 684
 685     options = qdict_new();
 686     qdict_put_str(options, "driver", "raw");
 687     qdict_put_str(options, "file", "base");
 688
 689     filter = bdrv_open(NULL, NULL, options, BDRV_O_RDWR, &error_abort);
 690     g_assert(blk_get_aio_context(blk) == ctx);
 691     g_assert(bdrv_get_aio_context(bs) == ctx);
 692     g_assert(bdrv_get_aio_context(filter) == ctx);
 693
 694     aio_context_acquire(ctx);
 695     blk_set_aio_context(blk, main_ctx, &error_abort);
 696     aio_context_release(ctx);
 697     g_assert(blk_get_aio_context(blk) == main_ctx);
 698     g_assert(bdrv_get_aio_context(bs) == main_ctx);
 699     g_assert(bdrv_get_aio_context(filter) == main_ctx);
 700
 701     bdrv_unref(filter);
 702     bdrv_unref(bs);
 703     blk_unref(blk);
 704 }
 705
 706 static void test_attach_preserve_blk_ctx(void)
 707 {
 708     IOThread *iothread = iothread_new();
 709     AioContext *ctx = iothread_get_aio_context(iothread);
 710     BlockBackend *blk;
 711     BlockDriverState *bs;
 712
 713     blk = blk_new(ctx, BLK_PERM_ALL, BLK_PERM_ALL);
 714     bs = bdrv_new_open_driver(&bdrv_test, "base", BDRV_O_RDWR, &error_abort);
 715     bs->total_sectors = 65536 / BDRV_SECTOR_SIZE;
 716
 717     /* Add node to BlockBackend that has an iothread context assigned */
 718     blk_insert_bs(blk, bs, &error_abort);
 719     g_assert(blk_get_aio_context(blk) == ctx);
 720     g_assert(bdrv_get_aio_context(bs) == ctx);
 721
 722     /* Remove the node again */
 723     aio_context_acquire(ctx);
 724     blk_remove_bs(blk);
 725     aio_context_release(ctx);
 726     g_assert(blk_get_aio_context(blk) == ctx);
 727     g_assert(bdrv_get_aio_context(bs) == qemu_get_aio_context());
 728
 729     /* Re-attach the node */
 730     blk_insert_bs(blk, bs, &error_abort);
 731     g_assert(blk_get_aio_context(blk) == ctx);
 732     g_assert(bdrv_get_aio_context(bs) == ctx);
 733
 734     aio_context_acquire(ctx);
 735     blk_set_aio_context(blk, qemu_get_aio_context(), &error_abort);
 736     aio_context_release(ctx);
 737     bdrv_unref(bs);
 738     blk_unref(blk);
 739 }
 740
 741 int main(int argc, char **argv)
 742 {
 743     int i;
 744
 745     bdrv_init();
 746     qemu_init_main_loop(&error_abort);
 747
 748     g_test_init(&argc, &argv, NULL);
 749
 750     for (i = 0; i < ARRAY_SIZE(sync_op_tests); i++) {
 751         const SyncOpTest *t = &sync_op_tests[i];
 752         g_test_add_data_func(t->name, t, test_sync_op);
 753     }
 754
 755     g_test_add_func("/attach/blockjob", test_attach_blockjob);
 756     g_test_add_func("/attach/second_node", test_attach_second_node);
 757     g_test_add_func("/attach/preserve_blk_ctx", test_attach_preserve_blk_ctx);
 758     g_test_add_func("/propagate/basic", test_propagate_basic);
 759     g_test_add_func("/propagate/diamond", test_propagate_diamond);
 760     g_test_add_func("/propagate/mirror", test_propagate_mirror);
 761
 762     return g_test_run();
 763 }