summaryrefslogtreecommitdiff
path: root/tests/test-vmstate.c
blob: 39f338a4c4c212bee0c2e2c71cbd81ac28ae4d51 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
/*
 *  Test code for VMState
 *
 *  Copyright (c) 2013 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "qemu/osdep.h"

#include "qemu-common.h"
#include "migration/migration.h"
#include "migration/vmstate.h"
#include "qemu/coroutine.h"
#include "io/channel-file.h"

static char temp_file[] = "/tmp/vmst.test.XXXXXX";
static int temp_fd;


/* Duplicate temp_fd and seek to the beginning of the file */
static QEMUFile *open_test_file(bool write)
{
    int fd = dup(temp_fd);
    QIOChannel *ioc;
    QEMUFile *f;

    lseek(fd, 0, SEEK_SET);
    if (write) {
        g_assert_cmpint(ftruncate(fd, 0), ==, 0);
    }
    ioc = QIO_CHANNEL(qio_channel_file_new_fd(fd));
    if (write) {
        f = qemu_fopen_channel_output(ioc);
    } else {
        f = qemu_fopen_channel_input(ioc);
    }
    object_unref(OBJECT(ioc));
    return f;
}

#define SUCCESS(val) \
    g_assert_cmpint((val), ==, 0)

#define FAILURE(val) \
    g_assert_cmpint((val), !=, 0)

static void save_vmstate(const VMStateDescription *desc, void *obj)
{
    QEMUFile *f = open_test_file(true);

    /* Save file with vmstate */
    vmstate_save_state(f, desc, obj, NULL);
    qemu_put_byte(f, QEMU_VM_EOF);
    g_assert(!qemu_file_get_error(f));
    qemu_fclose(f);
}

static void save_buffer(const uint8_t *buf, size_t buf_size)
{
    QEMUFile *fsave = open_test_file(true);
    qemu_put_buffer(fsave, buf, buf_size);
    qemu_fclose(fsave);
}

static void compare_vmstate(const uint8_t *wire, size_t size)
{
    QEMUFile *f = open_test_file(false);
    uint8_t result[size];

    /* read back as binary */

    g_assert_cmpint(qemu_get_buffer(f, result, sizeof(result)), ==,
                    sizeof(result));
    g_assert(!qemu_file_get_error(f));

    /* Compare that what is on the file is the same that what we
       expected to be there */
    SUCCESS(memcmp(result, wire, sizeof(result)));

    /* Must reach EOF */
    qemu_get_byte(f);
    g_assert_cmpint(qemu_file_get_error(f), ==, -EIO);

    qemu_fclose(f);
}

static int load_vmstate_one(const VMStateDescription *desc, void *obj,
                            int version, const uint8_t *wire, size_t size)
{
    QEMUFile *f;
    int ret;

    f = open_test_file(true);
    qemu_put_buffer(f, wire, size);
    qemu_fclose(f);

    f = open_test_file(false);
    ret = vmstate_load_state(f, desc, obj, version);
    if (ret) {
        g_assert(qemu_file_get_error(f));
    } else{
        g_assert(!qemu_file_get_error(f));
    }
    qemu_fclose(f);
    return ret;
}


static int load_vmstate(const VMStateDescription *desc,
                        void *obj, void *obj_clone,
                        void (*obj_copy)(void *, void*),
                        int version, const uint8_t *wire, size_t size)
{
    /* We test with zero size */
    obj_copy(obj_clone, obj);
    FAILURE(load_vmstate_one(desc, obj, version, wire, 0));

    /* Stream ends with QEMU_EOF, so we need at least 3 bytes to be
     * able to test in the middle */

    if (size > 3) {

        /* We test with size - 2. We can't test size - 1 due to EOF tricks */
        obj_copy(obj, obj_clone);
        FAILURE(load_vmstate_one(desc, obj, version, wire, size - 2));

        /* Test with size/2, first half of real state */
        obj_copy(obj, obj_clone);
        FAILURE(load_vmstate_one(desc, obj, version, wire, size/2));

        /* Test with size/2, second half of real state */
        obj_copy(obj, obj_clone);
        FAILURE(load_vmstate_one(desc, obj, version, wire + (size/2), size/2));

    }
    obj_copy(obj, obj_clone);
    return load_vmstate_one(desc, obj, version, wire, size);
}

/* Test struct that we are going to use for our tests */

typedef struct TestSimple {
    bool     b_1,   b_2;
    uint8_t  u8_1;
    uint16_t u16_1;
    uint32_t u32_1;
    uint64_t u64_1;
    int8_t   i8_1,  i8_2;
    int16_t  i16_1, i16_2;
    int32_t  i32_1, i32_2;
    int64_t  i64_1, i64_2;
} TestSimple;

/* Object instantiation, we are going to use it in more than one test */

TestSimple obj_simple = {
    .b_1 = true,
    .b_2 = false,
    .u8_1 = 130,
    .u16_1 = 512,
    .u32_1 = 70000,
    .u64_1 = 12121212,
    .i8_1 = 65,
    .i8_2 = -65,
    .i16_1 = 512,
    .i16_2 = -512,
    .i32_1 = 70000,
    .i32_2 = -70000,
    .i64_1 = 12121212,
    .i64_2 = -12121212,
};

/* Description of the values.  If you add a primitive type
   you are expected to add a test here */

static const VMStateDescription vmstate_simple_primitive = {
    .name = "simple/primitive",
    .version_id = 1,
    .minimum_version_id = 1,
    .fields = (VMStateField[]) {
        VMSTATE_BOOL(b_1, TestSimple),
        VMSTATE_BOOL(b_2, TestSimple),
        VMSTATE_UINT8(u8_1, TestSimple),
        VMSTATE_UINT16(u16_1, TestSimple),
        VMSTATE_UINT32(u32_1, TestSimple),
        VMSTATE_UINT64(u64_1, TestSimple),
        VMSTATE_INT8(i8_1, TestSimple),
        VMSTATE_INT8(i8_2, TestSimple),
        VMSTATE_INT16(i16_1, TestSimple),
        VMSTATE_INT16(i16_2, TestSimple),
        VMSTATE_INT32(i32_1, TestSimple),
        VMSTATE_INT32(i32_2, TestSimple),
        VMSTATE_INT64(i64_1, TestSimple),
        VMSTATE_INT64(i64_2, TestSimple),
        VMSTATE_END_OF_LIST()
    }
};

/* It describes what goes through the wire.  Our tests are basically:

   * save test
     - save a struct a vmstate to a file
     - read that file back (binary read, no vmstate)
     - compare it with what we expect to be on the wire
   * load test
     - save to the file what we expect to be on the wire
     - read struct back with vmstate in a different
     - compare back with the original struct
*/

uint8_t wire_simple_primitive[] = {
    /* b_1 */   0x01,
    /* b_2 */   0x00,
    /* u8_1 */  0x82,
    /* u16_1 */ 0x02, 0x00,
    /* u32_1 */ 0x00, 0x01, 0x11, 0x70,
    /* u64_1 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0xb8, 0xf4, 0x7c,
    /* i8_1 */  0x41,
    /* i8_2 */  0xbf,
    /* i16_1 */ 0x02, 0x00,
    /* i16_2 */ 0xfe, 0x0,
    /* i32_1 */ 0x00, 0x01, 0x11, 0x70,
    /* i32_2 */ 0xff, 0xfe, 0xee, 0x90,
    /* i64_1 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0xb8, 0xf4, 0x7c,
    /* i64_2 */ 0xff, 0xff, 0xff, 0xff, 0xff, 0x47, 0x0b, 0x84,
    QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
};

static void obj_simple_copy(void *target, void *source)
{
    memcpy(target, source, sizeof(TestSimple));
}

static void test_simple_primitive(void)
{
    TestSimple obj, obj_clone;

    memset(&obj, 0, sizeof(obj));
    save_vmstate(&vmstate_simple_primitive, &obj_simple);

    compare_vmstate(wire_simple_primitive, sizeof(wire_simple_primitive));

    SUCCESS(load_vmstate(&vmstate_simple_primitive, &obj, &obj_clone,
                         obj_simple_copy, 1, wire_simple_primitive,
                         sizeof(wire_simple_primitive)));

#define FIELD_EQUAL(name)   g_assert_cmpint(obj.name, ==, obj_simple.name)

    FIELD_EQUAL(b_1);
    FIELD_EQUAL(b_2);
    FIELD_EQUAL(u8_1);
    FIELD_EQUAL(u16_1);
    FIELD_EQUAL(u32_1);
    FIELD_EQUAL(u64_1);
    FIELD_EQUAL(i8_1);
    FIELD_EQUAL(i8_2);
    FIELD_EQUAL(i16_1);
    FIELD_EQUAL(i16_2);
    FIELD_EQUAL(i32_1);
    FIELD_EQUAL(i32_2);
    FIELD_EQUAL(i64_1);
    FIELD_EQUAL(i64_2);
}

typedef struct TestStruct {
    uint32_t a, b, c, e;
    uint64_t d, f;
    bool skip_c_e;
} TestStruct;

static const VMStateDescription vmstate_versioned = {
    .name = "test/versioned",
    .version_id = 2,
    .minimum_version_id = 1,
    .fields = (VMStateField[]) {
        VMSTATE_UINT32(a, TestStruct),
        VMSTATE_UINT32_V(b, TestStruct, 2), /* Versioned field in the middle, so
                                             * we catch bugs more easily.
                                             */
        VMSTATE_UINT32(c, TestStruct),
        VMSTATE_UINT64(d, TestStruct),
        VMSTATE_UINT32_V(e, TestStruct, 2),
        VMSTATE_UINT64_V(f, TestStruct, 2),
        VMSTATE_END_OF_LIST()
    }
};

static void test_load_v1(void)
{
    uint8_t buf[] = {
        0, 0, 0, 10,             /* a */
        0, 0, 0, 30,             /* c */
        0, 0, 0, 0, 0, 0, 0, 40, /* d */
        QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
    };
    save_buffer(buf, sizeof(buf));

    QEMUFile *loading = open_test_file(false);
    TestStruct obj = { .b = 200, .e = 500, .f = 600 };
    vmstate_load_state(loading, &vmstate_versioned, &obj, 1);
    g_assert(!qemu_file_get_error(loading));
    g_assert_cmpint(obj.a, ==, 10);
    g_assert_cmpint(obj.b, ==, 200);
    g_assert_cmpint(obj.c, ==, 30);
    g_assert_cmpint(obj.d, ==, 40);
    g_assert_cmpint(obj.e, ==, 500);
    g_assert_cmpint(obj.f, ==, 600);
    qemu_fclose(loading);
}

static void test_load_v2(void)
{
    uint8_t buf[] = {
        0, 0, 0, 10,             /* a */
        0, 0, 0, 20,             /* b */
        0, 0, 0, 30,             /* c */
        0, 0, 0, 0, 0, 0, 0, 40, /* d */
        0, 0, 0, 50,             /* e */
        0, 0, 0, 0, 0, 0, 0, 60, /* f */
        QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
    };
    save_buffer(buf, sizeof(buf));

    QEMUFile *loading = open_test_file(false);
    TestStruct obj;
    vmstate_load_state(loading, &vmstate_versioned, &obj, 2);
    g_assert_cmpint(obj.a, ==, 10);
    g_assert_cmpint(obj.b, ==, 20);
    g_assert_cmpint(obj.c, ==, 30);
    g_assert_cmpint(obj.d, ==, 40);
    g_assert_cmpint(obj.e, ==, 50);
    g_assert_cmpint(obj.f, ==, 60);
    qemu_fclose(loading);
}

static bool test_skip(void *opaque, int version_id)
{
    TestStruct *t = (TestStruct *)opaque;
    return !t->skip_c_e;
}

static const VMStateDescription vmstate_skipping = {
    .name = "test/skip",
    .version_id = 2,
    .minimum_version_id = 1,
    .fields = (VMStateField[]) {
        VMSTATE_UINT32(a, TestStruct),
        VMSTATE_UINT32(b, TestStruct),
        VMSTATE_UINT32_TEST(c, TestStruct, test_skip),
        VMSTATE_UINT64(d, TestStruct),
        VMSTATE_UINT32_TEST(e, TestStruct, test_skip),
        VMSTATE_UINT64_V(f, TestStruct, 2),
        VMSTATE_END_OF_LIST()
    }
};


static void test_save_noskip(void)
{
    QEMUFile *fsave = open_test_file(true);
    TestStruct obj = { .a = 1, .b = 2, .c = 3, .d = 4, .e = 5, .f = 6,
                       .skip_c_e = false };
    vmstate_save_state(fsave, &vmstate_skipping, &obj, NULL);
    g_assert(!qemu_file_get_error(fsave));

    uint8_t expected[] = {
        0, 0, 0, 1,             /* a */
        0, 0, 0, 2,             /* b */
        0, 0, 0, 3,             /* c */
        0, 0, 0, 0, 0, 0, 0, 4, /* d */
        0, 0, 0, 5,             /* e */
        0, 0, 0, 0, 0, 0, 0, 6, /* f */
    };

    qemu_fclose(fsave);
    compare_vmstate(expected, sizeof(expected));
}

static void test_save_skip(void)
{
    QEMUFile *fsave = open_test_file(true);
    TestStruct obj = { .a = 1, .b = 2, .c = 3, .d = 4, .e = 5, .f = 6,
                       .skip_c_e = true };
    vmstate_save_state(fsave, &vmstate_skipping, &obj, NULL);
    g_assert(!qemu_file_get_error(fsave));

    uint8_t expected[] = {
        0, 0, 0, 1,             /* a */
        0, 0, 0, 2,             /* b */
        0, 0, 0, 0, 0, 0, 0, 4, /* d */
        0, 0, 0, 0, 0, 0, 0, 6, /* f */
    };

    qemu_fclose(fsave);
    compare_vmstate(expected, sizeof(expected));
}

static void test_load_noskip(void)
{
    uint8_t buf[] = {
        0, 0, 0, 10,             /* a */
        0, 0, 0, 20,             /* b */
        0, 0, 0, 30,             /* c */
        0, 0, 0, 0, 0, 0, 0, 40, /* d */
        0, 0, 0, 50,             /* e */
        0, 0, 0, 0, 0, 0, 0, 60, /* f */
        QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
    };
    save_buffer(buf, sizeof(buf));

    QEMUFile *loading = open_test_file(false);
    TestStruct obj = { .skip_c_e = false };
    vmstate_load_state(loading, &vmstate_skipping, &obj, 2);
    g_assert(!qemu_file_get_error(loading));
    g_assert_cmpint(obj.a, ==, 10);
    g_assert_cmpint(obj.b, ==, 20);
    g_assert_cmpint(obj.c, ==, 30);
    g_assert_cmpint(obj.d, ==, 40);
    g_assert_cmpint(obj.e, ==, 50);
    g_assert_cmpint(obj.f, ==, 60);
    qemu_fclose(loading);
}

static void test_load_skip(void)
{
    uint8_t buf[] = {
        0, 0, 0, 10,             /* a */
        0, 0, 0, 20,             /* b */
        0, 0, 0, 0, 0, 0, 0, 40, /* d */
        0, 0, 0, 0, 0, 0, 0, 60, /* f */
        QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
    };
    save_buffer(buf, sizeof(buf));

    QEMUFile *loading = open_test_file(false);
    TestStruct obj = { .skip_c_e = true, .c = 300, .e = 500 };
    vmstate_load_state(loading, &vmstate_skipping, &obj, 2);
    g_assert(!qemu_file_get_error(loading));
    g_assert_cmpint(obj.a, ==, 10);
    g_assert_cmpint(obj.b, ==, 20);
    g_assert_cmpint(obj.c, ==, 300);
    g_assert_cmpint(obj.d, ==, 40);
    g_assert_cmpint(obj.e, ==, 500);
    g_assert_cmpint(obj.f, ==, 60);
    qemu_fclose(loading);
}

typedef struct {
    int32_t i;
} TestStructTriv;

const VMStateDescription vmsd_tst = {
    .name = "test/tst",
    .version_id = 1,
    .minimum_version_id = 1,
    .fields = (VMStateField[]) {
        VMSTATE_INT32(i, TestStructTriv),
        VMSTATE_END_OF_LIST()
    }
};

#define AR_SIZE 4

typedef struct {
    TestStructTriv *ar[AR_SIZE];
} TestArrayOfPtrToStuct;

const VMStateDescription vmsd_arps = {
    .name = "test/arps",
    .version_id = 1,
    .minimum_version_id = 1,
    .fields = (VMStateField[]) {
        VMSTATE_ARRAY_OF_POINTER_TO_STRUCT(ar, TestArrayOfPtrToStuct,
                AR_SIZE, 0, vmsd_tst, TestStructTriv),
        VMSTATE_END_OF_LIST()
    }
};
static void test_arr_ptr_str_no0_save(void)
{
    TestStructTriv ar[AR_SIZE] = {{.i = 0}, {.i = 1}, {.i = 2}, {.i = 3} };
    TestArrayOfPtrToStuct sample = {.ar = {&ar[0], &ar[1], &ar[2], &ar[3]} };
    uint8_t wire_sample[] = {
        0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x01,
        0x00, 0x00, 0x00, 0x02,
        0x00, 0x00, 0x00, 0x03,
        QEMU_VM_EOF
    };

    save_vmstate(&vmsd_arps, &sample);
    compare_vmstate(wire_sample, sizeof(wire_sample));
}

static void test_arr_ptr_str_no0_load(void)
{
    TestStructTriv ar_gt[AR_SIZE] = {{.i = 0}, {.i = 1}, {.i = 2}, {.i = 3} };
    TestStructTriv ar[AR_SIZE] = {};
    TestArrayOfPtrToStuct obj = {.ar = {&ar[0], &ar[1], &ar[2], &ar[3]} };
    int idx;
    uint8_t wire_sample[] = {
        0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x01,
        0x00, 0x00, 0x00, 0x02,
        0x00, 0x00, 0x00, 0x03,
        QEMU_VM_EOF
    };

    save_buffer(wire_sample, sizeof(wire_sample));
    SUCCESS(load_vmstate_one(&vmsd_arps, &obj, 1,
                          wire_sample, sizeof(wire_sample)));
    for (idx = 0; idx < AR_SIZE; ++idx) {
        /* compare the target array ar with the ground truth array ar_gt */
        g_assert_cmpint(ar_gt[idx].i, ==, ar[idx].i);
    }
}

/* test QTAILQ migration */
typedef struct TestQtailqElement TestQtailqElement;

struct TestQtailqElement {
    bool     b;
    uint8_t  u8;
    QTAILQ_ENTRY(TestQtailqElement) next;
};

typedef struct TestQtailq {
    int16_t  i16;
    QTAILQ_HEAD(TestQtailqHead, TestQtailqElement) q;
    int32_t  i32;
} TestQtailq;

static const VMStateDescription vmstate_q_element = {
    .name = "test/queue-element",
    .version_id = 1,
    .minimum_version_id = 1,
    .fields = (VMStateField[]) {
        VMSTATE_BOOL(b, TestQtailqElement),
        VMSTATE_UINT8(u8, TestQtailqElement),
        VMSTATE_END_OF_LIST()
    },
};

static const VMStateDescription vmstate_q = {
    .name = "test/queue",
    .version_id = 1,
    .minimum_version_id = 1,
    .fields = (VMStateField[]) {
        VMSTATE_INT16(i16, TestQtailq),
        VMSTATE_QTAILQ_V(q, TestQtailq, 1, vmstate_q_element, TestQtailqElement,
                         next),
        VMSTATE_INT32(i32, TestQtailq),
        VMSTATE_END_OF_LIST()
    }
};

uint8_t wire_q[] = {
    /* i16 */                     0xfe, 0x0,
    /* start of element 0 of q */ 0x01,
    /* .b  */                     0x01,
    /* .u8 */                     0x82,
    /* start of element 1 of q */ 0x01,
    /* b */                       0x00,
    /* u8 */                      0x41,
    /* end of q */                0x00,
    /* i32 */                     0x00, 0x01, 0x11, 0x70,
    QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
};

static void test_save_q(void)
{
    TestQtailq obj_q = {
        .i16 = -512,
        .i32 = 70000,
    };

    TestQtailqElement obj_qe1 = {
        .b = true,
        .u8 = 130,
    };

    TestQtailqElement obj_qe2 = {
        .b = false,
        .u8 = 65,
    };

    QTAILQ_INIT(&obj_q.q);
    QTAILQ_INSERT_TAIL(&obj_q.q, &obj_qe1, next);
    QTAILQ_INSERT_TAIL(&obj_q.q, &obj_qe2, next);

    save_vmstate(&vmstate_q, &obj_q);
    compare_vmstate(wire_q, sizeof(wire_q));
}

static void test_load_q(void)
{
    TestQtailq obj_q = {
        .i16 = -512,
        .i32 = 70000,
    };

    TestQtailqElement obj_qe1 = {
        .b = true,
        .u8 = 130,
    };

    TestQtailqElement obj_qe2 = {
        .b = false,
        .u8 = 65,
    };

    QTAILQ_INIT(&obj_q.q);
    QTAILQ_INSERT_TAIL(&obj_q.q, &obj_qe1, next);
    QTAILQ_INSERT_TAIL(&obj_q.q, &obj_qe2, next);

    QEMUFile *fsave = open_test_file(true);

    qemu_put_buffer(fsave, wire_q, sizeof(wire_q));
    g_assert(!qemu_file_get_error(fsave));
    qemu_fclose(fsave);

    QEMUFile *fload = open_test_file(false);
    TestQtailq tgt;

    QTAILQ_INIT(&tgt.q);
    vmstate_load_state(fload, &vmstate_q, &tgt, 1);
    char eof = qemu_get_byte(fload);
    g_assert(!qemu_file_get_error(fload));
    g_assert_cmpint(tgt.i16, ==, obj_q.i16);
    g_assert_cmpint(tgt.i32, ==, obj_q.i32);
    g_assert_cmpint(eof, ==, QEMU_VM_EOF);

    TestQtailqElement *qele_from = QTAILQ_FIRST(&obj_q.q);
    TestQtailqElement *qlast_from = QTAILQ_LAST(&obj_q.q, TestQtailqHead);
    TestQtailqElement *qele_to = QTAILQ_FIRST(&tgt.q);
    TestQtailqElement *qlast_to = QTAILQ_LAST(&tgt.q, TestQtailqHead);

    while (1) {
        g_assert_cmpint(qele_to->b, ==, qele_from->b);
        g_assert_cmpint(qele_to->u8, ==, qele_from->u8);
        if ((qele_from == qlast_from) || (qele_to == qlast_to)) {
            break;
        }
        qele_from = QTAILQ_NEXT(qele_from, next);
        qele_to = QTAILQ_NEXT(qele_to, next);
    }

    g_assert_cmpint((uintptr_t) qele_from, ==, (uintptr_t) qlast_from);
    g_assert_cmpint((uintptr_t) qele_to, ==, (uintptr_t) qlast_to);

    /* clean up */
    TestQtailqElement *qele;
    while (!QTAILQ_EMPTY(&tgt.q)) {
        qele = QTAILQ_LAST(&tgt.q, TestQtailqHead);
        QTAILQ_REMOVE(&tgt.q, qele, next);
        free(qele);
        qele = NULL;
    }
    qemu_fclose(fload);
}

typedef struct TmpTestStruct {
    TestStruct *parent;
    int64_t diff;
} TmpTestStruct;

static void tmp_child_pre_save(void *opaque)
{
    struct TmpTestStruct *tts = opaque;

    tts->diff = tts->parent->b - tts->parent->a;
}

static int tmp_child_post_load(void *opaque, int version_id)
{
    struct TmpTestStruct *tts = opaque;

    tts->parent->b = tts->parent->a + tts->diff;

    return 0;
}

static const VMStateDescription vmstate_tmp_back_to_parent = {
    .name = "test/tmp_child_parent",
    .fields = (VMStateField[]) {
        VMSTATE_UINT64(f, TestStruct),
        VMSTATE_END_OF_LIST()
    }
};

static const VMStateDescription vmstate_tmp_child = {
    .name = "test/tmp_child",
    .pre_save = tmp_child_pre_save,
    .post_load = tmp_child_post_load,
    .fields = (VMStateField[]) {
        VMSTATE_INT64(diff, TmpTestStruct),
        VMSTATE_STRUCT_POINTER(parent, TmpTestStruct,
                               vmstate_tmp_back_to_parent, TestStruct),
        VMSTATE_END_OF_LIST()
    }
};

static const VMStateDescription vmstate_with_tmp = {
    .name = "test/with_tmp",
    .version_id = 1,
    .fields = (VMStateField[]) {
        VMSTATE_UINT32(a, TestStruct),
        VMSTATE_UINT64(d, TestStruct),
        VMSTATE_WITH_TMP(TestStruct, TmpTestStruct, vmstate_tmp_child),
        VMSTATE_END_OF_LIST()
    }
};

static void obj_tmp_copy(void *target, void *source)
{
    memcpy(target, source, sizeof(TestStruct));
}

static void test_tmp_struct(void)
{
    TestStruct obj, obj_clone;

    uint8_t const wire_with_tmp[] = {
        /* u32 a */ 0x00, 0x00, 0x00, 0x02,
        /* u64 d */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
        /* diff  */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
        /* u64 f */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08,
        QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
    };

    memset(&obj, 0, sizeof(obj));
    obj.a = 2;
    obj.b = 4;
    obj.d = 1;
    obj.f = 8;
    save_vmstate(&vmstate_with_tmp, &obj);

    compare_vmstate(wire_with_tmp, sizeof(wire_with_tmp));

    memset(&obj, 0, sizeof(obj));
    SUCCESS(load_vmstate(&vmstate_with_tmp, &obj, &obj_clone,
                         obj_tmp_copy, 1, wire_with_tmp,
                         sizeof(wire_with_tmp)));
    g_assert_cmpint(obj.a, ==, 2); /* From top level vmsd */
    g_assert_cmpint(obj.b, ==, 4); /* from the post_load */
    g_assert_cmpint(obj.d, ==, 1); /* From top level vmsd */
    g_assert_cmpint(obj.f, ==, 8); /* From the child->parent */
}

int main(int argc, char **argv)
{
    temp_fd = mkstemp(temp_file);

    module_call_init(MODULE_INIT_QOM);

    g_test_init(&argc, &argv, NULL);
    g_test_add_func("/vmstate/simple/primitive", test_simple_primitive);
    g_test_add_func("/vmstate/versioned/load/v1", test_load_v1);
    g_test_add_func("/vmstate/versioned/load/v2", test_load_v2);
    g_test_add_func("/vmstate/field_exists/load/noskip", test_load_noskip);
    g_test_add_func("/vmstate/field_exists/load/skip", test_load_skip);
    g_test_add_func("/vmstate/field_exists/save/noskip", test_save_noskip);
    g_test_add_func("/vmstate/field_exists/save/skip", test_save_skip);
    g_test_add_func("/vmstate/array/ptr/str/no0/save",
                    test_arr_ptr_str_no0_save);
    g_test_add_func("/vmstate/array/ptr/str/no0/load",
                    test_arr_ptr_str_no0_load);
    g_test_add_func("/vmstate/qtailq/save/saveq", test_save_q);
    g_test_add_func("/vmstate/qtailq/load/loadq", test_load_q);
    g_test_add_func("/vmstate/tmp_struct", test_tmp_struct);
    g_test_run();

    close(temp_fd);
    unlink(temp_file);

    return 0;
}