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1 /*
2  *  Test code for VMState
3  *
4  *  Copyright (c) 2013 Red Hat Inc.
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
27 #include "../migration/migration.h"
28 #include "migration/vmstate.h"
29 #include "migration/qemu-file-types.h"
30 #include "../migration/qemu-file.h"
31 #include "../migration/qemu-file-channel.h"
32 #include "../migration/savevm.h"
33 #include "qemu/coroutine.h"
34 #include "qemu/module.h"
35 #include "io/channel-file.h"
36
37 static char temp_file[] = "/tmp/vmst.test.XXXXXX";
38 static int temp_fd;
39
40
41 /* Duplicate temp_fd and seek to the beginning of the file */
42 static QEMUFile *open_test_file(bool write)
43 {
44     int fd = dup(temp_fd);
45     QIOChannel *ioc;
46     QEMUFile *f;
47
48     lseek(fd, 0, SEEK_SET);
49     if (write) {
50         g_assert_cmpint(ftruncate(fd, 0), ==, 0);
51     }
52     ioc = QIO_CHANNEL(qio_channel_file_new_fd(fd));
53     if (write) {
54         f = qemu_fopen_channel_output(ioc);
55     } else {
56         f = qemu_fopen_channel_input(ioc);
57     }
58     object_unref(OBJECT(ioc));
59     return f;
60 }
61
62 #define SUCCESS(val) \
63     g_assert_cmpint((val), ==, 0)
64
65 #define FAILURE(val) \
66     g_assert_cmpint((val), !=, 0)
67
68 static void save_vmstate(const VMStateDescription *desc, void *obj)
69 {
70     QEMUFile *f = open_test_file(true);
71
72     /* Save file with vmstate */
73     int ret = vmstate_save_state(f, desc, obj, NULL);
74     g_assert(!ret);
75     qemu_put_byte(f, QEMU_VM_EOF);
76     g_assert(!qemu_file_get_error(f));
77     qemu_fclose(f);
78 }
79
80 static void save_buffer(const uint8_t *buf, size_t buf_size)
81 {
82     QEMUFile *fsave = open_test_file(true);
83     qemu_put_buffer(fsave, buf, buf_size);
84     qemu_fclose(fsave);
85 }
86
87 static void compare_vmstate(const uint8_t *wire, size_t size)
88 {
89     QEMUFile *f = open_test_file(false);
90     uint8_t result[size];
91
92     /* read back as binary */
93
94     g_assert_cmpint(qemu_get_buffer(f, result, sizeof(result)), ==,
95                     sizeof(result));
96     g_assert(!qemu_file_get_error(f));
97
98     /* Compare that what is on the file is the same that what we
99        expected to be there */
100     SUCCESS(memcmp(result, wire, sizeof(result)));
101
102     /* Must reach EOF */
103     qemu_get_byte(f);
104     g_assert_cmpint(qemu_file_get_error(f), ==, -EIO);
105
106     qemu_fclose(f);
107 }
108
109 static int load_vmstate_one(const VMStateDescription *desc, void *obj,
110                             int version, const uint8_t *wire, size_t size)
111 {
112     QEMUFile *f;
113     int ret;
114
115     f = open_test_file(true);
116     qemu_put_buffer(f, wire, size);
117     qemu_fclose(f);
118
119     f = open_test_file(false);
120     ret = vmstate_load_state(f, desc, obj, version);
121     if (ret) {
122         g_assert(qemu_file_get_error(f));
123     } else{
124         g_assert(!qemu_file_get_error(f));
125     }
126     qemu_fclose(f);
127     return ret;
128 }
129
130
131 static int load_vmstate(const VMStateDescription *desc,
132                         void *obj, void *obj_clone,
133                         void (*obj_copy)(void *, void*),
134                         int version, const uint8_t *wire, size_t size)
135 {
136     /* We test with zero size */
137     obj_copy(obj_clone, obj);
138     FAILURE(load_vmstate_one(desc, obj, version, wire, 0));
139
140     /* Stream ends with QEMU_EOF, so we need at least 3 bytes to be
141      * able to test in the middle */
142
143     if (size > 3) {
144
145         /* We test with size - 2. We can't test size - 1 due to EOF tricks */
146         obj_copy(obj, obj_clone);
147         FAILURE(load_vmstate_one(desc, obj, version, wire, size - 2));
148
149         /* Test with size/2, first half of real state */
150         obj_copy(obj, obj_clone);
151         FAILURE(load_vmstate_one(desc, obj, version, wire, size/2));
152
153         /* Test with size/2, second half of real state */
154         obj_copy(obj, obj_clone);
155         FAILURE(load_vmstate_one(desc, obj, version, wire + (size/2), size/2));
156
157     }
158     obj_copy(obj, obj_clone);
159     return load_vmstate_one(desc, obj, version, wire, size);
160 }
161
162 /* Test struct that we are going to use for our tests */
163
164 typedef struct TestSimple {
165     bool     b_1,   b_2;
166     uint8_t  u8_1;
167     uint16_t u16_1;
168     uint32_t u32_1;
169     uint64_t u64_1;
170     int8_t   i8_1,  i8_2;
171     int16_t  i16_1, i16_2;
172     int32_t  i32_1, i32_2;
173     int64_t  i64_1, i64_2;
174 } TestSimple;
175
176 /* Object instantiation, we are going to use it in more than one test */
177
178 TestSimple obj_simple = {
179     .b_1 = true,
180     .b_2 = false,
181     .u8_1 = 130,
182     .u16_1 = 512,
183     .u32_1 = 70000,
184     .u64_1 = 12121212,
185     .i8_1 = 65,
186     .i8_2 = -65,
187     .i16_1 = 512,
188     .i16_2 = -512,
189     .i32_1 = 70000,
190     .i32_2 = -70000,
191     .i64_1 = 12121212,
192     .i64_2 = -12121212,
193 };
194
195 /* Description of the values.  If you add a primitive type
196    you are expected to add a test here */
197
198 static const VMStateDescription vmstate_simple_primitive = {
199     .name = "simple/primitive",
200     .version_id = 1,
201     .minimum_version_id = 1,
202     .fields = (VMStateField[]) {
203         VMSTATE_BOOL(b_1, TestSimple),
204         VMSTATE_BOOL(b_2, TestSimple),
205         VMSTATE_UINT8(u8_1, TestSimple),
206         VMSTATE_UINT16(u16_1, TestSimple),
207         VMSTATE_UINT32(u32_1, TestSimple),
208         VMSTATE_UINT64(u64_1, TestSimple),
209         VMSTATE_INT8(i8_1, TestSimple),
210         VMSTATE_INT8(i8_2, TestSimple),
211         VMSTATE_INT16(i16_1, TestSimple),
212         VMSTATE_INT16(i16_2, TestSimple),
213         VMSTATE_INT32(i32_1, TestSimple),
214         VMSTATE_INT32(i32_2, TestSimple),
215         VMSTATE_INT64(i64_1, TestSimple),
216         VMSTATE_INT64(i64_2, TestSimple),
217         VMSTATE_END_OF_LIST()
218     }
219 };
220
221 /* It describes what goes through the wire.  Our tests are basically:
222
223    * save test
224      - save a struct a vmstate to a file
225      - read that file back (binary read, no vmstate)
226      - compare it with what we expect to be on the wire
227    * load test
228      - save to the file what we expect to be on the wire
229      - read struct back with vmstate in a different
230      - compare back with the original struct
231 */
232
233 uint8_t wire_simple_primitive[] = {
234     /* b_1 */   0x01,
235     /* b_2 */   0x00,
236     /* u8_1 */  0x82,
237     /* u16_1 */ 0x02, 0x00,
238     /* u32_1 */ 0x00, 0x01, 0x11, 0x70,
239     /* u64_1 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0xb8, 0xf4, 0x7c,
240     /* i8_1 */  0x41,
241     /* i8_2 */  0xbf,
242     /* i16_1 */ 0x02, 0x00,
243     /* i16_2 */ 0xfe, 0x0,
244     /* i32_1 */ 0x00, 0x01, 0x11, 0x70,
245     /* i32_2 */ 0xff, 0xfe, 0xee, 0x90,
246     /* i64_1 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0xb8, 0xf4, 0x7c,
247     /* i64_2 */ 0xff, 0xff, 0xff, 0xff, 0xff, 0x47, 0x0b, 0x84,
248     QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
249 };
250
251 static void obj_simple_copy(void *target, void *source)
252 {
253     memcpy(target, source, sizeof(TestSimple));
254 }
255
256 static void test_simple_primitive(void)
257 {
258     TestSimple obj, obj_clone;
259
260     memset(&obj, 0, sizeof(obj));
261     save_vmstate(&vmstate_simple_primitive, &obj_simple);
262
263     compare_vmstate(wire_simple_primitive, sizeof(wire_simple_primitive));
264
265     SUCCESS(load_vmstate(&vmstate_simple_primitive, &obj, &obj_clone,
266                          obj_simple_copy, 1, wire_simple_primitive,
267                          sizeof(wire_simple_primitive)));
268
269 #define FIELD_EQUAL(name)   g_assert_cmpint(obj.name, ==, obj_simple.name)
270
271     FIELD_EQUAL(b_1);
272     FIELD_EQUAL(b_2);
273     FIELD_EQUAL(u8_1);
274     FIELD_EQUAL(u16_1);
275     FIELD_EQUAL(u32_1);
276     FIELD_EQUAL(u64_1);
277     FIELD_EQUAL(i8_1);
278     FIELD_EQUAL(i8_2);
279     FIELD_EQUAL(i16_1);
280     FIELD_EQUAL(i16_2);
281     FIELD_EQUAL(i32_1);
282     FIELD_EQUAL(i32_2);
283     FIELD_EQUAL(i64_1);
284     FIELD_EQUAL(i64_2);
285 }
286
287 typedef struct TestSimpleArray {
288     uint16_t u16_1[3];
289 } TestSimpleArray;
290
291 /* Object instantiation, we are going to use it in more than one test */
292
293 TestSimpleArray obj_simple_arr = {
294     .u16_1 = { 0x42, 0x43, 0x44 },
295 };
296
297 /* Description of the values.  If you add a primitive type
298    you are expected to add a test here */
299
300 static const VMStateDescription vmstate_simple_arr = {
301     .name = "simple/array",
302     .version_id = 1,
303     .minimum_version_id = 1,
304     .fields = (VMStateField[]) {
305         VMSTATE_UINT16_ARRAY(u16_1, TestSimpleArray, 3),
306         VMSTATE_END_OF_LIST()
307     }
308 };
309
310 uint8_t wire_simple_arr[] = {
311     /* u16_1 */ 0x00, 0x42,
312     /* u16_1 */ 0x00, 0x43,
313     /* u16_1 */ 0x00, 0x44,
314     QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
315 };
316
317 static void obj_simple_arr_copy(void *target, void *source)
318 {
319     memcpy(target, source, sizeof(TestSimpleArray));
320 }
321
322 static void test_simple_array(void)
323 {
324     TestSimpleArray obj, obj_clone;
325
326     memset(&obj, 0, sizeof(obj));
327     save_vmstate(&vmstate_simple_arr, &obj_simple_arr);
328
329     compare_vmstate(wire_simple_arr, sizeof(wire_simple_arr));
330
331     SUCCESS(load_vmstate(&vmstate_simple_arr, &obj, &obj_clone,
332                          obj_simple_arr_copy, 1, wire_simple_arr,
333                          sizeof(wire_simple_arr)));
334 }
335
336 typedef struct TestStruct {
337     uint32_t a, b, c, e;
338     uint64_t d, f;
339     bool skip_c_e;
340 } TestStruct;
341
342 static const VMStateDescription vmstate_versioned = {
343     .name = "test/versioned",
344     .version_id = 2,
345     .minimum_version_id = 1,
346     .fields = (VMStateField[]) {
347         VMSTATE_UINT32(a, TestStruct),
348         VMSTATE_UINT32_V(b, TestStruct, 2), /* Versioned field in the middle, so
349                                              * we catch bugs more easily.
350                                              */
351         VMSTATE_UINT32(c, TestStruct),
352         VMSTATE_UINT64(d, TestStruct),
353         VMSTATE_UINT32_V(e, TestStruct, 2),
354         VMSTATE_UINT64_V(f, TestStruct, 2),
355         VMSTATE_END_OF_LIST()
356     }
357 };
358
359 static void test_load_v1(void)
360 {
361     uint8_t buf[] = {
362         0, 0, 0, 10,             /* a */
363         0, 0, 0, 30,             /* c */
364         0, 0, 0, 0, 0, 0, 0, 40, /* d */
365         QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
366     };
367     save_buffer(buf, sizeof(buf));
368
369     QEMUFile *loading = open_test_file(false);
370     TestStruct obj = { .b = 200, .e = 500, .f = 600 };
371     vmstate_load_state(loading, &vmstate_versioned, &obj, 1);
372     g_assert(!qemu_file_get_error(loading));
373     g_assert_cmpint(obj.a, ==, 10);
374     g_assert_cmpint(obj.b, ==, 200);
375     g_assert_cmpint(obj.c, ==, 30);
376     g_assert_cmpint(obj.d, ==, 40);
377     g_assert_cmpint(obj.e, ==, 500);
378     g_assert_cmpint(obj.f, ==, 600);
379     qemu_fclose(loading);
380 }
381
382 static void test_load_v2(void)
383 {
384     uint8_t buf[] = {
385         0, 0, 0, 10,             /* a */
386         0, 0, 0, 20,             /* b */
387         0, 0, 0, 30,             /* c */
388         0, 0, 0, 0, 0, 0, 0, 40, /* d */
389         0, 0, 0, 50,             /* e */
390         0, 0, 0, 0, 0, 0, 0, 60, /* f */
391         QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
392     };
393     save_buffer(buf, sizeof(buf));
394
395     QEMUFile *loading = open_test_file(false);
396     TestStruct obj;
397     vmstate_load_state(loading, &vmstate_versioned, &obj, 2);
398     g_assert_cmpint(obj.a, ==, 10);
399     g_assert_cmpint(obj.b, ==, 20);
400     g_assert_cmpint(obj.c, ==, 30);
401     g_assert_cmpint(obj.d, ==, 40);
402     g_assert_cmpint(obj.e, ==, 50);
403     g_assert_cmpint(obj.f, ==, 60);
404     qemu_fclose(loading);
405 }
406
407 static bool test_skip(void *opaque, int version_id)
408 {
409     TestStruct *t = (TestStruct *)opaque;
410     return !t->skip_c_e;
411 }
412
413 static const VMStateDescription vmstate_skipping = {
414     .name = "test/skip",
415     .version_id = 2,
416     .minimum_version_id = 1,
417     .fields = (VMStateField[]) {
418         VMSTATE_UINT32(a, TestStruct),
419         VMSTATE_UINT32(b, TestStruct),
420         VMSTATE_UINT32_TEST(c, TestStruct, test_skip),
421         VMSTATE_UINT64(d, TestStruct),
422         VMSTATE_UINT32_TEST(e, TestStruct, test_skip),
423         VMSTATE_UINT64_V(f, TestStruct, 2),
424         VMSTATE_END_OF_LIST()
425     }
426 };
427
428
429 static void test_save_noskip(void)
430 {
431     QEMUFile *fsave = open_test_file(true);
432     TestStruct obj = { .a = 1, .b = 2, .c = 3, .d = 4, .e = 5, .f = 6,
433                        .skip_c_e = false };
434     int ret = vmstate_save_state(fsave, &vmstate_skipping, &obj, NULL);
435     g_assert(!ret);
436     g_assert(!qemu_file_get_error(fsave));
437
438     uint8_t expected[] = {
439         0, 0, 0, 1,             /* a */
440         0, 0, 0, 2,             /* b */
441         0, 0, 0, 3,             /* c */
442         0, 0, 0, 0, 0, 0, 0, 4, /* d */
443         0, 0, 0, 5,             /* e */
444         0, 0, 0, 0, 0, 0, 0, 6, /* f */
445     };
446
447     qemu_fclose(fsave);
448     compare_vmstate(expected, sizeof(expected));
449 }
450
451 static void test_save_skip(void)
452 {
453     QEMUFile *fsave = open_test_file(true);
454     TestStruct obj = { .a = 1, .b = 2, .c = 3, .d = 4, .e = 5, .f = 6,
455                        .skip_c_e = true };
456     int ret = vmstate_save_state(fsave, &vmstate_skipping, &obj, NULL);
457     g_assert(!ret);
458     g_assert(!qemu_file_get_error(fsave));
459
460     uint8_t expected[] = {
461         0, 0, 0, 1,             /* a */
462         0, 0, 0, 2,             /* b */
463         0, 0, 0, 0, 0, 0, 0, 4, /* d */
464         0, 0, 0, 0, 0, 0, 0, 6, /* f */
465     };
466
467     qemu_fclose(fsave);
468     compare_vmstate(expected, sizeof(expected));
469 }
470
471 static void test_load_noskip(void)
472 {
473     uint8_t buf[] = {
474         0, 0, 0, 10,             /* a */
475         0, 0, 0, 20,             /* b */
476         0, 0, 0, 30,             /* c */
477         0, 0, 0, 0, 0, 0, 0, 40, /* d */
478         0, 0, 0, 50,             /* e */
479         0, 0, 0, 0, 0, 0, 0, 60, /* f */
480         QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
481     };
482     save_buffer(buf, sizeof(buf));
483
484     QEMUFile *loading = open_test_file(false);
485     TestStruct obj = { .skip_c_e = false };
486     vmstate_load_state(loading, &vmstate_skipping, &obj, 2);
487     g_assert(!qemu_file_get_error(loading));
488     g_assert_cmpint(obj.a, ==, 10);
489     g_assert_cmpint(obj.b, ==, 20);
490     g_assert_cmpint(obj.c, ==, 30);
491     g_assert_cmpint(obj.d, ==, 40);
492     g_assert_cmpint(obj.e, ==, 50);
493     g_assert_cmpint(obj.f, ==, 60);
494     qemu_fclose(loading);
495 }
496
497 static void test_load_skip(void)
498 {
499     uint8_t buf[] = {
500         0, 0, 0, 10,             /* a */
501         0, 0, 0, 20,             /* b */
502         0, 0, 0, 0, 0, 0, 0, 40, /* d */
503         0, 0, 0, 0, 0, 0, 0, 60, /* f */
504         QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
505     };
506     save_buffer(buf, sizeof(buf));
507
508     QEMUFile *loading = open_test_file(false);
509     TestStruct obj = { .skip_c_e = true, .c = 300, .e = 500 };
510     vmstate_load_state(loading, &vmstate_skipping, &obj, 2);
511     g_assert(!qemu_file_get_error(loading));
512     g_assert_cmpint(obj.a, ==, 10);
513     g_assert_cmpint(obj.b, ==, 20);
514     g_assert_cmpint(obj.c, ==, 300);
515     g_assert_cmpint(obj.d, ==, 40);
516     g_assert_cmpint(obj.e, ==, 500);
517     g_assert_cmpint(obj.f, ==, 60);
518     qemu_fclose(loading);
519 }
520
521 typedef struct {
522     int32_t i;
523 } TestStructTriv;
524
525 const VMStateDescription vmsd_tst = {
526     .name = "test/tst",
527     .version_id = 1,
528     .minimum_version_id = 1,
529     .fields = (VMStateField[]) {
530         VMSTATE_INT32(i, TestStructTriv),
531         VMSTATE_END_OF_LIST()
532     }
533 };
534
535 /* test array migration */
536
537 #define AR_SIZE 4
538
539 typedef struct {
540     TestStructTriv *ar[AR_SIZE];
541 } TestArrayOfPtrToStuct;
542
543 const VMStateDescription vmsd_arps = {
544     .name = "test/arps",
545     .version_id = 1,
546     .minimum_version_id = 1,
547     .fields = (VMStateField[]) {
548         VMSTATE_ARRAY_OF_POINTER_TO_STRUCT(ar, TestArrayOfPtrToStuct,
549                 AR_SIZE, 0, vmsd_tst, TestStructTriv),
550         VMSTATE_END_OF_LIST()
551     }
552 };
553
554 static uint8_t wire_arr_ptr_no0[] = {
555     0x00, 0x00, 0x00, 0x00,
556     0x00, 0x00, 0x00, 0x01,
557     0x00, 0x00, 0x00, 0x02,
558     0x00, 0x00, 0x00, 0x03,
559     QEMU_VM_EOF
560 };
561
562 static void test_arr_ptr_str_no0_save(void)
563 {
564     TestStructTriv ar[AR_SIZE] = {{.i = 0}, {.i = 1}, {.i = 2}, {.i = 3} };
565     TestArrayOfPtrToStuct sample = {.ar = {&ar[0], &ar[1], &ar[2], &ar[3]} };
566
567     save_vmstate(&vmsd_arps, &sample);
568     compare_vmstate(wire_arr_ptr_no0, sizeof(wire_arr_ptr_no0));
569 }
570
571 static void test_arr_ptr_str_no0_load(void)
572 {
573     TestStructTriv ar_gt[AR_SIZE] = {{.i = 0}, {.i = 1}, {.i = 2}, {.i = 3} };
574     TestStructTriv ar[AR_SIZE] = {};
575     TestArrayOfPtrToStuct obj = {.ar = {&ar[0], &ar[1], &ar[2], &ar[3]} };
576     int idx;
577
578     save_buffer(wire_arr_ptr_no0, sizeof(wire_arr_ptr_no0));
579     SUCCESS(load_vmstate_one(&vmsd_arps, &obj, 1,
580                           wire_arr_ptr_no0, sizeof(wire_arr_ptr_no0)));
581     for (idx = 0; idx < AR_SIZE; ++idx) {
582         /* compare the target array ar with the ground truth array ar_gt */
583         g_assert_cmpint(ar_gt[idx].i, ==, ar[idx].i);
584     }
585 }
586
587 static uint8_t wire_arr_ptr_0[] = {
588     0x00, 0x00, 0x00, 0x00,
589     VMS_NULLPTR_MARKER,
590     0x00, 0x00, 0x00, 0x02,
591     0x00, 0x00, 0x00, 0x03,
592     QEMU_VM_EOF
593 };
594
595 static void test_arr_ptr_str_0_save(void)
596 {
597     TestStructTriv ar[AR_SIZE] = {{.i = 0}, {.i = 1}, {.i = 2}, {.i = 3} };
598     TestArrayOfPtrToStuct sample = {.ar = {&ar[0], NULL, &ar[2], &ar[3]} };
599
600     save_vmstate(&vmsd_arps, &sample);
601     compare_vmstate(wire_arr_ptr_0, sizeof(wire_arr_ptr_0));
602 }
603
604 static void test_arr_ptr_str_0_load(void)
605 {
606     TestStructTriv ar_gt[AR_SIZE] = {{.i = 0}, {.i = 0}, {.i = 2}, {.i = 3} };
607     TestStructTriv ar[AR_SIZE] = {};
608     TestArrayOfPtrToStuct obj = {.ar = {&ar[0], NULL, &ar[2], &ar[3]} };
609     int idx;
610
611     save_buffer(wire_arr_ptr_0, sizeof(wire_arr_ptr_0));
612     SUCCESS(load_vmstate_one(&vmsd_arps, &obj, 1,
613                           wire_arr_ptr_0, sizeof(wire_arr_ptr_0)));
614     for (idx = 0; idx < AR_SIZE; ++idx) {
615         /* compare the target array ar with the ground truth array ar_gt */
616         g_assert_cmpint(ar_gt[idx].i, ==, ar[idx].i);
617     }
618     for (idx = 0; idx < AR_SIZE; ++idx) {
619         if (idx == 1) {
620             g_assert_cmpint((uintptr_t)(obj.ar[idx]), ==, 0);
621         } else {
622             g_assert_cmpint((uintptr_t)(obj.ar[idx]), !=, 0);
623         }
624     }
625 }
626
627 typedef struct TestArrayOfPtrToInt {
628     int32_t *ar[AR_SIZE];
629 } TestArrayOfPtrToInt;
630
631 const VMStateDescription vmsd_arpp = {
632     .name = "test/arps",
633     .version_id = 1,
634     .minimum_version_id = 1,
635     .fields = (VMStateField[]) {
636         VMSTATE_ARRAY_OF_POINTER(ar, TestArrayOfPtrToInt,
637                 AR_SIZE, 0, vmstate_info_int32, int32_t*),
638         VMSTATE_END_OF_LIST()
639     }
640 };
641
642 static void test_arr_ptr_prim_0_save(void)
643 {
644     int32_t ar[AR_SIZE] = {0 , 1, 2, 3};
645     TestArrayOfPtrToInt  sample = {.ar = {&ar[0], NULL, &ar[2], &ar[3]} };
646
647     save_vmstate(&vmsd_arpp, &sample);
648     compare_vmstate(wire_arr_ptr_0, sizeof(wire_arr_ptr_0));
649 }
650
651 static void test_arr_ptr_prim_0_load(void)
652 {
653     int32_t ar_gt[AR_SIZE] = {0, 1, 2, 3};
654     int32_t ar[AR_SIZE] = {3 , 42, 1, 0};
655     TestArrayOfPtrToInt obj = {.ar = {&ar[0], NULL, &ar[2], &ar[3]} };
656     int idx;
657
658     save_buffer(wire_arr_ptr_0, sizeof(wire_arr_ptr_0));
659     SUCCESS(load_vmstate_one(&vmsd_arpp, &obj, 1,
660                           wire_arr_ptr_0, sizeof(wire_arr_ptr_0)));
661     for (idx = 0; idx < AR_SIZE; ++idx) {
662         /* compare the target array ar with the ground truth array ar_gt */
663         if (idx == 1) {
664             g_assert_cmpint(42, ==, ar[idx]);
665         } else {
666             g_assert_cmpint(ar_gt[idx], ==, ar[idx]);
667         }
668     }
669 }
670
671 /* test QTAILQ migration */
672 typedef struct TestQtailqElement TestQtailqElement;
673
674 struct TestQtailqElement {
675     bool     b;
676     uint8_t  u8;
677     QTAILQ_ENTRY(TestQtailqElement) next;
678 };
679
680 typedef struct TestQtailq {
681     int16_t  i16;
682     QTAILQ_HEAD(, TestQtailqElement) q;
683     int32_t  i32;
684 } TestQtailq;
685
686 static const VMStateDescription vmstate_q_element = {
687     .name = "test/queue-element",
688     .version_id = 1,
689     .minimum_version_id = 1,
690     .fields = (VMStateField[]) {
691         VMSTATE_BOOL(b, TestQtailqElement),
692         VMSTATE_UINT8(u8, TestQtailqElement),
693         VMSTATE_END_OF_LIST()
694     },
695 };
696
697 static const VMStateDescription vmstate_q = {
698     .name = "test/queue",
699     .version_id = 1,
700     .minimum_version_id = 1,
701     .fields = (VMStateField[]) {
702         VMSTATE_INT16(i16, TestQtailq),
703         VMSTATE_QTAILQ_V(q, TestQtailq, 1, vmstate_q_element, TestQtailqElement,
704                          next),
705         VMSTATE_INT32(i32, TestQtailq),
706         VMSTATE_END_OF_LIST()
707     }
708 };
709
710 uint8_t wire_q[] = {
711     /* i16 */                     0xfe, 0x0,
712     /* start of element 0 of q */ 0x01,
713     /* .b  */                     0x01,
714     /* .u8 */                     0x82,
715     /* start of element 1 of q */ 0x01,
716     /* b */                       0x00,
717     /* u8 */                      0x41,
718     /* end of q */                0x00,
719     /* i32 */                     0x00, 0x01, 0x11, 0x70,
720     QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
721 };
722
723 static void test_save_q(void)
724 {
725     TestQtailq obj_q = {
726         .i16 = -512,
727         .i32 = 70000,
728     };
729
730     TestQtailqElement obj_qe1 = {
731         .b = true,
732         .u8 = 130,
733     };
734
735     TestQtailqElement obj_qe2 = {
736         .b = false,
737         .u8 = 65,
738     };
739
740     QTAILQ_INIT(&obj_q.q);
741     QTAILQ_INSERT_TAIL(&obj_q.q, &obj_qe1, next);
742     QTAILQ_INSERT_TAIL(&obj_q.q, &obj_qe2, next);
743
744     save_vmstate(&vmstate_q, &obj_q);
745     compare_vmstate(wire_q, sizeof(wire_q));
746 }
747
748 static void test_load_q(void)
749 {
750     TestQtailq obj_q = {
751         .i16 = -512,
752         .i32 = 70000,
753     };
754
755     TestQtailqElement obj_qe1 = {
756         .b = true,
757         .u8 = 130,
758     };
759
760     TestQtailqElement obj_qe2 = {
761         .b = false,
762         .u8 = 65,
763     };
764
765     QTAILQ_INIT(&obj_q.q);
766     QTAILQ_INSERT_TAIL(&obj_q.q, &obj_qe1, next);
767     QTAILQ_INSERT_TAIL(&obj_q.q, &obj_qe2, next);
768
769     QEMUFile *fsave = open_test_file(true);
770
771     qemu_put_buffer(fsave, wire_q, sizeof(wire_q));
772     g_assert(!qemu_file_get_error(fsave));
773     qemu_fclose(fsave);
774
775     QEMUFile *fload = open_test_file(false);
776     TestQtailq tgt;
777
778     QTAILQ_INIT(&tgt.q);
779     vmstate_load_state(fload, &vmstate_q, &tgt, 1);
780     char eof = qemu_get_byte(fload);
781     g_assert(!qemu_file_get_error(fload));
782     g_assert_cmpint(tgt.i16, ==, obj_q.i16);
783     g_assert_cmpint(tgt.i32, ==, obj_q.i32);
784     g_assert_cmpint(eof, ==, QEMU_VM_EOF);
785
786     TestQtailqElement *qele_from = QTAILQ_FIRST(&obj_q.q);
787     TestQtailqElement *qlast_from = QTAILQ_LAST(&obj_q.q);
788     TestQtailqElement *qele_to = QTAILQ_FIRST(&tgt.q);
789     TestQtailqElement *qlast_to = QTAILQ_LAST(&tgt.q);
790
791     while (1) {
792         g_assert_cmpint(qele_to->b, ==, qele_from->b);
793         g_assert_cmpint(qele_to->u8, ==, qele_from->u8);
794         if ((qele_from == qlast_from) || (qele_to == qlast_to)) {
795             break;
796         }
797         qele_from = QTAILQ_NEXT(qele_from, next);
798         qele_to = QTAILQ_NEXT(qele_to, next);
799     }
800
801     g_assert_cmpint((uintptr_t) qele_from, ==, (uintptr_t) qlast_from);
802     g_assert_cmpint((uintptr_t) qele_to, ==, (uintptr_t) qlast_to);
803
804     /* clean up */
805     TestQtailqElement *qele;
806     while (!QTAILQ_EMPTY(&tgt.q)) {
807         qele = QTAILQ_LAST(&tgt.q);
808         QTAILQ_REMOVE(&tgt.q, qele, next);
809         free(qele);
810         qele = NULL;
811     }
812     qemu_fclose(fload);
813 }
814
815 /* interval (key) */
816 typedef struct TestGTreeInterval {
817     uint64_t low;
818     uint64_t high;
819 } TestGTreeInterval;
820
821 #define VMSTATE_INTERVAL                               \
822 {                                                      \
823     .name = "interval",                                \
824     .version_id = 1,                                   \
825     .minimum_version_id = 1,                           \
826     .fields = (VMStateField[]) {                       \
827         VMSTATE_UINT64(low, TestGTreeInterval),        \
828         VMSTATE_UINT64(high, TestGTreeInterval),       \
829         VMSTATE_END_OF_LIST()                          \
830     }                                                  \
831 }
832
833 /* mapping (value) */
834 typedef struct TestGTreeMapping {
835     uint64_t phys_addr;
836     uint32_t flags;
837 } TestGTreeMapping;
838
839 #define VMSTATE_MAPPING                               \
840 {                                                     \
841     .name = "mapping",                                \
842     .version_id = 1,                                  \
843     .minimum_version_id = 1,                          \
844     .fields = (VMStateField[]) {                      \
845         VMSTATE_UINT64(phys_addr, TestGTreeMapping),  \
846         VMSTATE_UINT32(flags, TestGTreeMapping),      \
847         VMSTATE_END_OF_LIST()                         \
848     },                                                \
849 }
850
851 static const VMStateDescription vmstate_interval_mapping[2] = {
852     VMSTATE_MAPPING,   /* value */
853     VMSTATE_INTERVAL   /* key   */
854 };
855
856 typedef struct TestGTreeDomain {
857     int32_t  id;
858     GTree    *mappings;
859 } TestGTreeDomain;
860
861 typedef struct TestGTreeIOMMU {
862     int32_t  id;
863     GTree    *domains;
864 } TestGTreeIOMMU;
865
866 /* Interval comparison function */
867 static gint interval_cmp(gconstpointer a, gconstpointer b, gpointer user_data)
868 {
869     TestGTreeInterval *inta = (TestGTreeInterval *)a;
870     TestGTreeInterval *intb = (TestGTreeInterval *)b;
871
872     if (inta->high < intb->low) {
873         return -1;
874     } else if (intb->high < inta->low) {
875         return 1;
876     } else {
877         return 0;
878     }
879 }
880
881 /* ID comparison function */
882 static gint int_cmp(gconstpointer a, gconstpointer b, gpointer user_data)
883 {
884     uint ua = GPOINTER_TO_UINT(a);
885     uint ub = GPOINTER_TO_UINT(b);
886     return (ua > ub) - (ua < ub);
887 }
888
889 static void destroy_domain(gpointer data)
890 {
891     TestGTreeDomain *domain = (TestGTreeDomain *)data;
892
893     g_tree_destroy(domain->mappings);
894     g_free(domain);
895 }
896
897 static int domain_preload(void *opaque)
898 {
899     TestGTreeDomain *domain = opaque;
900
901     domain->mappings = g_tree_new_full((GCompareDataFunc)interval_cmp,
902                                        NULL, g_free, g_free);
903     return 0;
904 }
905
906 static int iommu_preload(void *opaque)
907 {
908     TestGTreeIOMMU *iommu = opaque;
909
910     iommu->domains = g_tree_new_full((GCompareDataFunc)int_cmp,
911                                      NULL, NULL, destroy_domain);
912     return 0;
913 }
914
915 static const VMStateDescription vmstate_domain = {
916     .name = "domain",
917     .version_id = 1,
918     .minimum_version_id = 1,
919     .pre_load = domain_preload,
920     .fields = (VMStateField[]) {
921         VMSTATE_INT32(id, TestGTreeDomain),
922         VMSTATE_GTREE_V(mappings, TestGTreeDomain, 1,
923                         vmstate_interval_mapping,
924                         TestGTreeInterval, TestGTreeMapping),
925         VMSTATE_END_OF_LIST()
926     }
927 };
928
929 static const VMStateDescription vmstate_iommu = {
930     .name = "iommu",
931     .version_id = 1,
932     .minimum_version_id = 1,
933     .pre_load = iommu_preload,
934     .fields = (VMStateField[]) {
935         VMSTATE_INT32(id, TestGTreeIOMMU),
936         VMSTATE_GTREE_DIRECT_KEY_V(domains, TestGTreeIOMMU, 1,
937                                    &vmstate_domain, TestGTreeDomain),
938         VMSTATE_END_OF_LIST()
939     }
940 };
941
942 uint8_t first_domain_dump[] = {
943     /* id */
944     0x00, 0x0, 0x0, 0x6,
945     0x00, 0x0, 0x0, 0x2, /* 2 mappings */
946     0x1, /* start of a */
947     /* a */
948     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
949     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1F, 0xFF,
950     /* map_a */
951     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa0, 0x00,
952     0x00, 0x00, 0x00, 0x01,
953     0x1, /* start of b */
954     /* b */
955     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00,
956     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x4F, 0xFF,
957     /* map_b */
958     0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x00, 0x00,
959     0x00, 0x00, 0x00, 0x02,
960     0x0, /* end of gtree */
961     QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
962 };
963
964 static TestGTreeDomain *create_first_domain(void)
965 {
966     TestGTreeDomain *domain;
967     TestGTreeMapping *map_a, *map_b;
968     TestGTreeInterval *a, *b;
969
970     domain = g_malloc0(sizeof(TestGTreeDomain));
971     domain->id = 6;
972
973     a = g_malloc0(sizeof(TestGTreeInterval));
974     a->low = 0x1000;
975     a->high = 0x1FFF;
976
977     b = g_malloc0(sizeof(TestGTreeInterval));
978     b->low = 0x4000;
979     b->high = 0x4FFF;
980
981     map_a = g_malloc0(sizeof(TestGTreeMapping));
982     map_a->phys_addr = 0xa000;
983     map_a->flags = 1;
984
985     map_b = g_malloc0(sizeof(TestGTreeMapping));
986     map_b->phys_addr = 0xe0000;
987     map_b->flags = 2;
988
989     domain->mappings = g_tree_new_full((GCompareDataFunc)interval_cmp, NULL,
990                                         (GDestroyNotify)g_free,
991                                         (GDestroyNotify)g_free);
992     g_tree_insert(domain->mappings, a, map_a);
993     g_tree_insert(domain->mappings, b, map_b);
994     return domain;
995 }
996
997 static void test_gtree_save_domain(void)
998 {
999     TestGTreeDomain *first_domain = create_first_domain();
1000
1001     save_vmstate(&vmstate_domain, first_domain);
1002     compare_vmstate(first_domain_dump, sizeof(first_domain_dump));
1003     destroy_domain(first_domain);
1004 }
1005
1006 struct match_node_data {
1007     GTree *tree;
1008     gpointer key;
1009     gpointer value;
1010 };
1011
1012 struct tree_cmp_data {
1013     GTree *tree1;
1014     GTree *tree2;
1015     GTraverseFunc match_node;
1016 };
1017
1018 static gboolean match_interval_mapping_node(gpointer key,
1019                                             gpointer value, gpointer data)
1020 {
1021     TestGTreeMapping *map_a, *map_b;
1022     TestGTreeInterval *a, *b;
1023     struct match_node_data *d = (struct match_node_data *)data;
1024     char *str = g_strdup_printf("dest");
1025
1026     g_free(str);
1027     a = (TestGTreeInterval *)key;
1028     b = (TestGTreeInterval *)d->key;
1029
1030     map_a = (TestGTreeMapping *)value;
1031     map_b = (TestGTreeMapping *)d->value;
1032
1033     assert(a->low == b->low);
1034     assert(a->high == b->high);
1035     assert(map_a->phys_addr == map_b->phys_addr);
1036     assert(map_a->flags == map_b->flags);
1037     g_tree_remove(d->tree, key);
1038     return true;
1039 }
1040
1041 static gboolean diff_tree(gpointer key, gpointer value, gpointer data)
1042 {
1043     struct tree_cmp_data *tp = (struct tree_cmp_data *)data;
1044     struct match_node_data d = {tp->tree2, key, value};
1045
1046     g_tree_foreach(tp->tree2, tp->match_node, &d);
1047     g_tree_remove(tp->tree1, key);
1048     return false;
1049 }
1050
1051 static void compare_trees(GTree *tree1, GTree *tree2,
1052                           GTraverseFunc function)
1053 {
1054     struct tree_cmp_data tp = {tree1, tree2, function};
1055
1056     g_tree_foreach(tree1, diff_tree, &tp);
1057     assert(g_tree_nnodes(tree1) == 0);
1058     assert(g_tree_nnodes(tree2) == 0);
1059 }
1060
1061 static void diff_domain(TestGTreeDomain *d1, TestGTreeDomain *d2)
1062 {
1063     assert(d1->id == d2->id);
1064     compare_trees(d1->mappings, d2->mappings, match_interval_mapping_node);
1065 }
1066
1067 static gboolean match_domain_node(gpointer key, gpointer value, gpointer data)
1068 {
1069     uint64_t id1, id2;
1070     TestGTreeDomain *d1, *d2;
1071     struct match_node_data *d = (struct match_node_data *)data;
1072
1073     id1 = (uint64_t)(uintptr_t)key;
1074     id2 = (uint64_t)(uintptr_t)d->key;
1075     d1 = (TestGTreeDomain *)value;
1076     d2 = (TestGTreeDomain *)d->value;
1077     assert(id1 == id2);
1078     diff_domain(d1, d2);
1079     g_tree_remove(d->tree, key);
1080     return true;
1081 }
1082
1083 static void diff_iommu(TestGTreeIOMMU *iommu1, TestGTreeIOMMU *iommu2)
1084 {
1085     assert(iommu1->id == iommu2->id);
1086     compare_trees(iommu1->domains, iommu2->domains, match_domain_node);
1087 }
1088
1089 static void test_gtree_load_domain(void)
1090 {
1091     TestGTreeDomain *dest_domain = g_malloc0(sizeof(TestGTreeDomain));
1092     TestGTreeDomain *orig_domain = create_first_domain();
1093     QEMUFile *fload, *fsave;
1094     char eof;
1095
1096     fsave = open_test_file(true);
1097     qemu_put_buffer(fsave, first_domain_dump, sizeof(first_domain_dump));
1098     g_assert(!qemu_file_get_error(fsave));
1099     qemu_fclose(fsave);
1100
1101     fload = open_test_file(false);
1102
1103     vmstate_load_state(fload, &vmstate_domain, dest_domain, 1);
1104     eof = qemu_get_byte(fload);
1105     g_assert(!qemu_file_get_error(fload));
1106     g_assert_cmpint(orig_domain->id, ==, dest_domain->id);
1107     g_assert_cmpint(eof, ==, QEMU_VM_EOF);
1108
1109     diff_domain(orig_domain, dest_domain);
1110     destroy_domain(orig_domain);
1111     destroy_domain(dest_domain);
1112     qemu_fclose(fload);
1113 }
1114
1115 uint8_t iommu_dump[] = {
1116     /* iommu id */
1117     0x00, 0x0, 0x0, 0x7,
1118     0x00, 0x0, 0x0, 0x2, /* 2 domains */
1119     0x1,/* start of domain 5 */
1120         0x00, 0x00, 0x00, 0x00, 0x00, 0x0, 0x0, 0x5, /* key = 5 */
1121         0x00, 0x0, 0x0, 0x5, /* domain1 id */
1122         0x00, 0x0, 0x0, 0x1, /* 1 mapping */
1123         0x1, /* start of mappings */
1124             /* c */
1125             0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
1126             0x00, 0x00, 0x00, 0x00, 0x01, 0xFF, 0xFF, 0xFF,
1127             /* map_c */
1128             0x00, 0x00, 0x00, 0x00, 0x0F, 0x00, 0x00, 0x00,
1129             0x00, 0x0, 0x0, 0x3,
1130             0x0, /* end of domain1 mappings*/
1131     0x1,/* start of domain 6 */
1132         0x00, 0x00, 0x00, 0x00, 0x00, 0x0, 0x0, 0x6, /* key = 6 */
1133         0x00, 0x0, 0x0, 0x6, /* domain6 id */
1134             0x00, 0x0, 0x0, 0x2, /* 2 mappings */
1135             0x1, /* start of a */
1136             /* a */
1137             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
1138             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1F, 0xFF,
1139             /* map_a */
1140             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa0, 0x00,
1141             0x00, 0x00, 0x00, 0x01,
1142             0x1, /* start of b */
1143             /* b */
1144             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00,
1145             0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x4F, 0xFF,
1146             /* map_b */
1147             0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x00, 0x00,
1148             0x00, 0x00, 0x00, 0x02,
1149             0x0, /* end of domain6 mappings*/
1150     0x0, /* end of domains */
1151     QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
1152 };
1153
1154 static TestGTreeIOMMU *create_iommu(void)
1155 {
1156     TestGTreeIOMMU *iommu = g_malloc0(sizeof(TestGTreeIOMMU));
1157     TestGTreeDomain *first_domain = create_first_domain();
1158     TestGTreeDomain *second_domain;
1159     TestGTreeMapping *map_c;
1160     TestGTreeInterval *c;
1161
1162     iommu->id = 7;
1163     iommu->domains = g_tree_new_full((GCompareDataFunc)int_cmp, NULL,
1164                                      NULL,
1165                                      destroy_domain);
1166
1167     second_domain = g_malloc0(sizeof(TestGTreeDomain));
1168     second_domain->id = 5;
1169     second_domain->mappings = g_tree_new_full((GCompareDataFunc)interval_cmp,
1170                                               NULL,
1171                                               (GDestroyNotify)g_free,
1172                                               (GDestroyNotify)g_free);
1173
1174     g_tree_insert(iommu->domains, GUINT_TO_POINTER(6), first_domain);
1175     g_tree_insert(iommu->domains, (gpointer)0x0000000000000005, second_domain);
1176
1177     c = g_malloc0(sizeof(TestGTreeInterval));
1178     c->low = 0x1000000;
1179     c->high = 0x1FFFFFF;
1180
1181     map_c = g_malloc0(sizeof(TestGTreeMapping));
1182     map_c->phys_addr = 0xF000000;
1183     map_c->flags = 0x3;
1184
1185     g_tree_insert(second_domain->mappings, c, map_c);
1186     return iommu;
1187 }
1188
1189 static void destroy_iommu(TestGTreeIOMMU *iommu)
1190 {
1191     g_tree_destroy(iommu->domains);
1192     g_free(iommu);
1193 }
1194
1195 static void test_gtree_save_iommu(void)
1196 {
1197     TestGTreeIOMMU *iommu = create_iommu();
1198
1199     save_vmstate(&vmstate_iommu, iommu);
1200     compare_vmstate(iommu_dump, sizeof(iommu_dump));
1201     destroy_iommu(iommu);
1202 }
1203
1204 static void test_gtree_load_iommu(void)
1205 {
1206     TestGTreeIOMMU *dest_iommu = g_malloc0(sizeof(TestGTreeIOMMU));
1207     TestGTreeIOMMU *orig_iommu = create_iommu();
1208     QEMUFile *fsave, *fload;
1209     char eof;
1210     int ret;
1211
1212     fsave = open_test_file(true);
1213     qemu_put_buffer(fsave, iommu_dump, sizeof(iommu_dump));
1214     g_assert(!qemu_file_get_error(fsave));
1215     qemu_fclose(fsave);
1216
1217     fload = open_test_file(false);
1218     vmstate_load_state(fload, &vmstate_iommu, dest_iommu, 1);
1219     ret = qemu_file_get_error(fload);
1220     eof = qemu_get_byte(fload);
1221     ret = qemu_file_get_error(fload);
1222     g_assert(!ret);
1223     g_assert_cmpint(orig_iommu->id, ==, dest_iommu->id);
1224     g_assert_cmpint(eof, ==, QEMU_VM_EOF);
1225
1226     diff_iommu(orig_iommu, dest_iommu);
1227     destroy_iommu(orig_iommu);
1228     destroy_iommu(dest_iommu);
1229     qemu_fclose(fload);
1230 }
1231
1232 typedef struct TmpTestStruct {
1233     TestStruct *parent;
1234     int64_t diff;
1235 } TmpTestStruct;
1236
1237 static int tmp_child_pre_save(void *opaque)
1238 {
1239     struct TmpTestStruct *tts = opaque;
1240
1241     tts->diff = tts->parent->b - tts->parent->a;
1242
1243     return 0;
1244 }
1245
1246 static int tmp_child_post_load(void *opaque, int version_id)
1247 {
1248     struct TmpTestStruct *tts = opaque;
1249
1250     tts->parent->b = tts->parent->a + tts->diff;
1251
1252     return 0;
1253 }
1254
1255 static const VMStateDescription vmstate_tmp_back_to_parent = {
1256     .name = "test/tmp_child_parent",
1257     .fields = (VMStateField[]) {
1258         VMSTATE_UINT64(f, TestStruct),
1259         VMSTATE_END_OF_LIST()
1260     }
1261 };
1262
1263 static const VMStateDescription vmstate_tmp_child = {
1264     .name = "test/tmp_child",
1265     .pre_save = tmp_child_pre_save,
1266     .post_load = tmp_child_post_load,
1267     .fields = (VMStateField[]) {
1268         VMSTATE_INT64(diff, TmpTestStruct),
1269         VMSTATE_STRUCT_POINTER(parent, TmpTestStruct,
1270                                vmstate_tmp_back_to_parent, TestStruct),
1271         VMSTATE_END_OF_LIST()
1272     }
1273 };
1274
1275 static const VMStateDescription vmstate_with_tmp = {
1276     .name = "test/with_tmp",
1277     .version_id = 1,
1278     .fields = (VMStateField[]) {
1279         VMSTATE_UINT32(a, TestStruct),
1280         VMSTATE_UINT64(d, TestStruct),
1281         VMSTATE_WITH_TMP(TestStruct, TmpTestStruct, vmstate_tmp_child),
1282         VMSTATE_END_OF_LIST()
1283     }
1284 };
1285
1286 static void obj_tmp_copy(void *target, void *source)
1287 {
1288     memcpy(target, source, sizeof(TestStruct));
1289 }
1290
1291 static void test_tmp_struct(void)
1292 {
1293     TestStruct obj, obj_clone;
1294
1295     uint8_t const wire_with_tmp[] = {
1296         /* u32 a */ 0x00, 0x00, 0x00, 0x02,
1297         /* u64 d */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
1298         /* diff  */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
1299         /* u64 f */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08,
1300         QEMU_VM_EOF, /* just to ensure we won't get EOF reported prematurely */
1301     };
1302
1303     memset(&obj, 0, sizeof(obj));
1304     obj.a = 2;
1305     obj.b = 4;
1306     obj.d = 1;
1307     obj.f = 8;
1308     save_vmstate(&vmstate_with_tmp, &obj);
1309
1310     compare_vmstate(wire_with_tmp, sizeof(wire_with_tmp));
1311
1312     memset(&obj, 0, sizeof(obj));
1313     SUCCESS(load_vmstate(&vmstate_with_tmp, &obj, &obj_clone,
1314                          obj_tmp_copy, 1, wire_with_tmp,
1315                          sizeof(wire_with_tmp)));
1316     g_assert_cmpint(obj.a, ==, 2); /* From top level vmsd */
1317     g_assert_cmpint(obj.b, ==, 4); /* from the post_load */
1318     g_assert_cmpint(obj.d, ==, 1); /* From top level vmsd */
1319     g_assert_cmpint(obj.f, ==, 8); /* From the child->parent */
1320 }
1321
1322 int main(int argc, char **argv)
1323 {
1324     temp_fd = mkstemp(temp_file);
1325
1326     module_call_init(MODULE_INIT_QOM);
1327
1328     g_setenv("QTEST_SILENT_ERRORS", "1", 1);
1329
1330     g_test_init(&argc, &argv, NULL);
1331     g_test_add_func("/vmstate/simple/primitive", test_simple_primitive);
1332     g_test_add_func("/vmstate/simple/array", test_simple_array);
1333     g_test_add_func("/vmstate/versioned/load/v1", test_load_v1);
1334     g_test_add_func("/vmstate/versioned/load/v2", test_load_v2);
1335     g_test_add_func("/vmstate/field_exists/load/noskip", test_load_noskip);
1336     g_test_add_func("/vmstate/field_exists/load/skip", test_load_skip);
1337     g_test_add_func("/vmstate/field_exists/save/noskip", test_save_noskip);
1338     g_test_add_func("/vmstate/field_exists/save/skip", test_save_skip);
1339     g_test_add_func("/vmstate/array/ptr/str/no0/save",
1340                     test_arr_ptr_str_no0_save);
1341     g_test_add_func("/vmstate/array/ptr/str/no0/load",
1342                     test_arr_ptr_str_no0_load);
1343     g_test_add_func("/vmstate/array/ptr/str/0/save", test_arr_ptr_str_0_save);
1344     g_test_add_func("/vmstate/array/ptr/str/0/load",
1345                     test_arr_ptr_str_0_load);
1346     g_test_add_func("/vmstate/array/ptr/prim/0/save",
1347                     test_arr_ptr_prim_0_save);
1348     g_test_add_func("/vmstate/array/ptr/prim/0/load",
1349                     test_arr_ptr_prim_0_load);
1350     g_test_add_func("/vmstate/qtailq/save/saveq", test_save_q);
1351     g_test_add_func("/vmstate/qtailq/load/loadq", test_load_q);
1352     g_test_add_func("/vmstate/gtree/save/savedomain", test_gtree_save_domain);
1353     g_test_add_func("/vmstate/gtree/load/loaddomain", test_gtree_load_domain);
1354     g_test_add_func("/vmstate/gtree/save/saveiommu", test_gtree_save_iommu);
1355     g_test_add_func("/vmstate/gtree/load/loadiommu", test_gtree_load_iommu);
1356     g_test_add_func("/vmstate/tmp_struct", test_tmp_struct);
1357     g_test_run();
1358
1359     close(temp_fd);
1360     unlink(temp_file);
1361
1362     return 0;
1363 }
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