jcs.org
qemu with hax to log dma reads & writes
jcs.org/2018/11/12/vfio
1/*
2 * VMStateInfo's for basic typse
3 *
4 * Copyright (c) 2009-2017 Red Hat Inc
5 *
6 * Authors:
7 * Juan Quintela <quintela@redhat.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2 or later.
10 * See the COPYING file in the top-level directory.
11 */
12
13#include "qemu/osdep.h"
14#include "qemu-file.h"
15#include "migration.h"
16#include "migration/vmstate.h"
17#include "qemu/error-report.h"
18#include "qemu/queue.h"
19#include "trace.h"
20
21/* bool */
22
23static int get_bool(QEMUFile *f, void *pv, size_t size,
24 const VMStateField *field)
25{
26 bool *v = pv;
27 *v = qemu_get_byte(f);
28 return 0;
29}
30
31static int put_bool(QEMUFile *f, void *pv, size_t size,
32 const VMStateField *field, QJSON *vmdesc)
33{
34 bool *v = pv;
35 qemu_put_byte(f, *v);
36 return 0;
37}
38
39const VMStateInfo vmstate_info_bool = {
40 .name = "bool",
41 .get = get_bool,
42 .put = put_bool,
43};
44
45/* 8 bit int */
46
47static int get_int8(QEMUFile *f, void *pv, size_t size,
48 const VMStateField *field)
49{
50 int8_t *v = pv;
51 qemu_get_s8s(f, v);
52 return 0;
53}
54
55static int put_int8(QEMUFile *f, void *pv, size_t size,
56 const VMStateField *field, QJSON *vmdesc)
57{
58 int8_t *v = pv;
59 qemu_put_s8s(f, v);
60 return 0;
61}
62
63const VMStateInfo vmstate_info_int8 = {
64 .name = "int8",
65 .get = get_int8,
66 .put = put_int8,
67};
68
69/* 16 bit int */
70
71static int get_int16(QEMUFile *f, void *pv, size_t size,
72 const VMStateField *field)
73{
74 int16_t *v = pv;
75 qemu_get_sbe16s(f, v);
76 return 0;
77}
78
79static int put_int16(QEMUFile *f, void *pv, size_t size,
80 const VMStateField *field, QJSON *vmdesc)
81{
82 int16_t *v = pv;
83 qemu_put_sbe16s(f, v);
84 return 0;
85}
86
87const VMStateInfo vmstate_info_int16 = {
88 .name = "int16",
89 .get = get_int16,
90 .put = put_int16,
91};
92
93/* 32 bit int */
94
95static int get_int32(QEMUFile *f, void *pv, size_t size,
96 const VMStateField *field)
97{
98 int32_t *v = pv;
99 qemu_get_sbe32s(f, v);
100 return 0;
101}
102
103static int put_int32(QEMUFile *f, void *pv, size_t size,
104 const VMStateField *field, QJSON *vmdesc)
105{
106 int32_t *v = pv;
107 qemu_put_sbe32s(f, v);
108 return 0;
109}
110
111const VMStateInfo vmstate_info_int32 = {
112 .name = "int32",
113 .get = get_int32,
114 .put = put_int32,
115};
116
117/* 32 bit int. See that the received value is the same than the one
118 in the field */
119
120static int get_int32_equal(QEMUFile *f, void *pv, size_t size,
121 const VMStateField *field)
122{
123 int32_t *v = pv;
124 int32_t v2;
125 qemu_get_sbe32s(f, &v2);
126
127 if (*v == v2) {
128 return 0;
129 }
130 error_report("%" PRIx32 " != %" PRIx32, *v, v2);
131 if (field->err_hint) {
132 error_printf("%s\n", field->err_hint);
133 }
134 return -EINVAL;
135}
136
137const VMStateInfo vmstate_info_int32_equal = {
138 .name = "int32 equal",
139 .get = get_int32_equal,
140 .put = put_int32,
141};
142
143/* 32 bit int. Check that the received value is non-negative
144 * and less than or equal to the one in the field.
145 */
146
147static int get_int32_le(QEMUFile *f, void *pv, size_t size,
148 const VMStateField *field)
149{
150 int32_t *cur = pv;
151 int32_t loaded;
152 qemu_get_sbe32s(f, &loaded);
153
154 if (loaded >= 0 && loaded <= *cur) {
155 *cur = loaded;
156 return 0;
157 }
158 error_report("Invalid value %" PRId32
159 " expecting positive value <= %" PRId32,
160 loaded, *cur);
161 return -EINVAL;
162}
163
164const VMStateInfo vmstate_info_int32_le = {
165 .name = "int32 le",
166 .get = get_int32_le,
167 .put = put_int32,
168};
169
170/* 64 bit int */
171
172static int get_int64(QEMUFile *f, void *pv, size_t size,
173 const VMStateField *field)
174{
175 int64_t *v = pv;
176 qemu_get_sbe64s(f, v);
177 return 0;
178}
179
180static int put_int64(QEMUFile *f, void *pv, size_t size,
181 const VMStateField *field, QJSON *vmdesc)
182{
183 int64_t *v = pv;
184 qemu_put_sbe64s(f, v);
185 return 0;
186}
187
188const VMStateInfo vmstate_info_int64 = {
189 .name = "int64",
190 .get = get_int64,
191 .put = put_int64,
192};
193
194/* 8 bit unsigned int */
195
196static int get_uint8(QEMUFile *f, void *pv, size_t size,
197 const VMStateField *field)
198{
199 uint8_t *v = pv;
200 qemu_get_8s(f, v);
201 return 0;
202}
203
204static int put_uint8(QEMUFile *f, void *pv, size_t size,
205 const VMStateField *field, QJSON *vmdesc)
206{
207 uint8_t *v = pv;
208 qemu_put_8s(f, v);
209 return 0;
210}
211
212const VMStateInfo vmstate_info_uint8 = {
213 .name = "uint8",
214 .get = get_uint8,
215 .put = put_uint8,
216};
217
218/* 16 bit unsigned int */
219
220static int get_uint16(QEMUFile *f, void *pv, size_t size,
221 const VMStateField *field)
222{
223 uint16_t *v = pv;
224 qemu_get_be16s(f, v);
225 return 0;
226}
227
228static int put_uint16(QEMUFile *f, void *pv, size_t size,
229 const VMStateField *field, QJSON *vmdesc)
230{
231 uint16_t *v = pv;
232 qemu_put_be16s(f, v);
233 return 0;
234}
235
236const VMStateInfo vmstate_info_uint16 = {
237 .name = "uint16",
238 .get = get_uint16,
239 .put = put_uint16,
240};
241
242/* 32 bit unsigned int */
243
244static int get_uint32(QEMUFile *f, void *pv, size_t size,
245 const VMStateField *field)
246{
247 uint32_t *v = pv;
248 qemu_get_be32s(f, v);
249 return 0;
250}
251
252static int put_uint32(QEMUFile *f, void *pv, size_t size,
253 const VMStateField *field, QJSON *vmdesc)
254{
255 uint32_t *v = pv;
256 qemu_put_be32s(f, v);
257 return 0;
258}
259
260const VMStateInfo vmstate_info_uint32 = {
261 .name = "uint32",
262 .get = get_uint32,
263 .put = put_uint32,
264};
265
266/* 32 bit uint. See that the received value is the same than the one
267 in the field */
268
269static int get_uint32_equal(QEMUFile *f, void *pv, size_t size,
270 const VMStateField *field)
271{
272 uint32_t *v = pv;
273 uint32_t v2;
274 qemu_get_be32s(f, &v2);
275
276 if (*v == v2) {
277 return 0;
278 }
279 error_report("%" PRIx32 " != %" PRIx32, *v, v2);
280 if (field->err_hint) {
281 error_printf("%s\n", field->err_hint);
282 }
283 return -EINVAL;
284}
285
286const VMStateInfo vmstate_info_uint32_equal = {
287 .name = "uint32 equal",
288 .get = get_uint32_equal,
289 .put = put_uint32,
290};
291
292/* 64 bit unsigned int */
293
294static int get_uint64(QEMUFile *f, void *pv, size_t size,
295 const VMStateField *field)
296{
297 uint64_t *v = pv;
298 qemu_get_be64s(f, v);
299 return 0;
300}
301
302static int put_uint64(QEMUFile *f, void *pv, size_t size,
303 const VMStateField *field, QJSON *vmdesc)
304{
305 uint64_t *v = pv;
306 qemu_put_be64s(f, v);
307 return 0;
308}
309
310const VMStateInfo vmstate_info_uint64 = {
311 .name = "uint64",
312 .get = get_uint64,
313 .put = put_uint64,
314};
315
316static int get_nullptr(QEMUFile *f, void *pv, size_t size,
317 const VMStateField *field)
318
319{
320 if (qemu_get_byte(f) == VMS_NULLPTR_MARKER) {
321 return 0;
322 }
323 error_report("vmstate: get_nullptr expected VMS_NULLPTR_MARKER");
324 return -EINVAL;
325}
326
327static int put_nullptr(QEMUFile *f, void *pv, size_t size,
328 const VMStateField *field, QJSON *vmdesc)
329
330{
331 if (pv == NULL) {
332 qemu_put_byte(f, VMS_NULLPTR_MARKER);
333 return 0;
334 }
335 error_report("vmstate: put_nullptr must be called with pv == NULL");
336 return -EINVAL;
337}
338
339const VMStateInfo vmstate_info_nullptr = {
340 .name = "uint64",
341 .get = get_nullptr,
342 .put = put_nullptr,
343};
344
345/* 64 bit unsigned int. See that the received value is the same than the one
346 in the field */
347
348static int get_uint64_equal(QEMUFile *f, void *pv, size_t size,
349 const VMStateField *field)
350{
351 uint64_t *v = pv;
352 uint64_t v2;
353 qemu_get_be64s(f, &v2);
354
355 if (*v == v2) {
356 return 0;
357 }
358 error_report("%" PRIx64 " != %" PRIx64, *v, v2);
359 if (field->err_hint) {
360 error_printf("%s\n", field->err_hint);
361 }
362 return -EINVAL;
363}
364
365const VMStateInfo vmstate_info_uint64_equal = {
366 .name = "int64 equal",
367 .get = get_uint64_equal,
368 .put = put_uint64,
369};
370
371/* 8 bit int. See that the received value is the same than the one
372 in the field */
373
374static int get_uint8_equal(QEMUFile *f, void *pv, size_t size,
375 const VMStateField *field)
376{
377 uint8_t *v = pv;
378 uint8_t v2;
379 qemu_get_8s(f, &v2);
380
381 if (*v == v2) {
382 return 0;
383 }
384 error_report("%x != %x", *v, v2);
385 if (field->err_hint) {
386 error_printf("%s\n", field->err_hint);
387 }
388 return -EINVAL;
389}
390
391const VMStateInfo vmstate_info_uint8_equal = {
392 .name = "uint8 equal",
393 .get = get_uint8_equal,
394 .put = put_uint8,
395};
396
397/* 16 bit unsigned int int. See that the received value is the same than the one
398 in the field */
399
400static int get_uint16_equal(QEMUFile *f, void *pv, size_t size,
401 const VMStateField *field)
402{
403 uint16_t *v = pv;
404 uint16_t v2;
405 qemu_get_be16s(f, &v2);
406
407 if (*v == v2) {
408 return 0;
409 }
410 error_report("%x != %x", *v, v2);
411 if (field->err_hint) {
412 error_printf("%s\n", field->err_hint);
413 }
414 return -EINVAL;
415}
416
417const VMStateInfo vmstate_info_uint16_equal = {
418 .name = "uint16 equal",
419 .get = get_uint16_equal,
420 .put = put_uint16,
421};
422
423/* floating point */
424
425static int get_float64(QEMUFile *f, void *pv, size_t size,
426 const VMStateField *field)
427{
428 float64 *v = pv;
429
430 *v = make_float64(qemu_get_be64(f));
431 return 0;
432}
433
434static int put_float64(QEMUFile *f, void *pv, size_t size,
435 const VMStateField *field, QJSON *vmdesc)
436{
437 uint64_t *v = pv;
438
439 qemu_put_be64(f, float64_val(*v));
440 return 0;
441}
442
443const VMStateInfo vmstate_info_float64 = {
444 .name = "float64",
445 .get = get_float64,
446 .put = put_float64,
447};
448
449/* CPU_DoubleU type */
450
451static int get_cpudouble(QEMUFile *f, void *pv, size_t size,
452 const VMStateField *field)
453{
454 CPU_DoubleU *v = pv;
455 qemu_get_be32s(f, &v->l.upper);
456 qemu_get_be32s(f, &v->l.lower);
457 return 0;
458}
459
460static int put_cpudouble(QEMUFile *f, void *pv, size_t size,
461 const VMStateField *field, QJSON *vmdesc)
462{
463 CPU_DoubleU *v = pv;
464 qemu_put_be32s(f, &v->l.upper);
465 qemu_put_be32s(f, &v->l.lower);
466 return 0;
467}
468
469const VMStateInfo vmstate_info_cpudouble = {
470 .name = "CPU_Double_U",
471 .get = get_cpudouble,
472 .put = put_cpudouble,
473};
474
475/* uint8_t buffers */
476
477static int get_buffer(QEMUFile *f, void *pv, size_t size,
478 const VMStateField *field)
479{
480 uint8_t *v = pv;
481 qemu_get_buffer(f, v, size);
482 return 0;
483}
484
485static int put_buffer(QEMUFile *f, void *pv, size_t size,
486 const VMStateField *field, QJSON *vmdesc)
487{
488 uint8_t *v = pv;
489 qemu_put_buffer(f, v, size);
490 return 0;
491}
492
493const VMStateInfo vmstate_info_buffer = {
494 .name = "buffer",
495 .get = get_buffer,
496 .put = put_buffer,
497};
498
499/* unused buffers: space that was used for some fields that are
500 not useful anymore */
501
502static int get_unused_buffer(QEMUFile *f, void *pv, size_t size,
503 const VMStateField *field)
504{
505 uint8_t buf[1024];
506 int block_len;
507
508 while (size > 0) {
509 block_len = MIN(sizeof(buf), size);
510 size -= block_len;
511 qemu_get_buffer(f, buf, block_len);
512 }
513 return 0;
514}
515
516static int put_unused_buffer(QEMUFile *f, void *pv, size_t size,
517 const VMStateField *field, QJSON *vmdesc)
518{
519 static const uint8_t buf[1024];
520 int block_len;
521
522 while (size > 0) {
523 block_len = MIN(sizeof(buf), size);
524 size -= block_len;
525 qemu_put_buffer(f, buf, block_len);
526 }
527
528 return 0;
529}
530
531const VMStateInfo vmstate_info_unused_buffer = {
532 .name = "unused_buffer",
533 .get = get_unused_buffer,
534 .put = put_unused_buffer,
535};
536
537/* vmstate_info_tmp, see VMSTATE_WITH_TMP, the idea is that we allocate
538 * a temporary buffer and the pre_load/pre_save methods in the child vmsd
539 * copy stuff from the parent into the child and do calculations to fill
540 * in fields that don't really exist in the parent but need to be in the
541 * stream.
542 */
543static int get_tmp(QEMUFile *f, void *pv, size_t size,
544 const VMStateField *field)
545{
546 int ret;
547 const VMStateDescription *vmsd = field->vmsd;
548 int version_id = field->version_id;
549 void *tmp = g_malloc(size);
550
551 /* Writes the parent field which is at the start of the tmp */
552 *(void **)tmp = pv;
553 ret = vmstate_load_state(f, vmsd, tmp, version_id);
554 g_free(tmp);
555 return ret;
556}
557
558static int put_tmp(QEMUFile *f, void *pv, size_t size,
559 const VMStateField *field, QJSON *vmdesc)
560{
561 const VMStateDescription *vmsd = field->vmsd;
562 void *tmp = g_malloc(size);
563 int ret;
564
565 /* Writes the parent field which is at the start of the tmp */
566 *(void **)tmp = pv;
567 ret = vmstate_save_state(f, vmsd, tmp, vmdesc);
568 g_free(tmp);
569
570 return ret;
571}
572
573const VMStateInfo vmstate_info_tmp = {
574 .name = "tmp",
575 .get = get_tmp,
576 .put = put_tmp,
577};
578
579/* bitmaps (as defined by bitmap.h). Note that size here is the size
580 * of the bitmap in bits. The on-the-wire format of a bitmap is 64
581 * bit words with the bits in big endian order. The in-memory format
582 * is an array of 'unsigned long', which may be either 32 or 64 bits.
583 */
584/* This is the number of 64 bit words sent over the wire */
585#define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64)
586static int get_bitmap(QEMUFile *f, void *pv, size_t size,
587 const VMStateField *field)
588{
589 unsigned long *bmp = pv;
590 int i, idx = 0;
591 for (i = 0; i < BITS_TO_U64S(size); i++) {
592 uint64_t w = qemu_get_be64(f);
593 bmp[idx++] = w;
594 if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) {
595 bmp[idx++] = w >> 32;
596 }
597 }
598 return 0;
599}
600
601static int put_bitmap(QEMUFile *f, void *pv, size_t size,
602 const VMStateField *field, QJSON *vmdesc)
603{
604 unsigned long *bmp = pv;
605 int i, idx = 0;
606 for (i = 0; i < BITS_TO_U64S(size); i++) {
607 uint64_t w = bmp[idx++];
608 if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) {
609 w |= ((uint64_t)bmp[idx++]) << 32;
610 }
611 qemu_put_be64(f, w);
612 }
613
614 return 0;
615}
616
617const VMStateInfo vmstate_info_bitmap = {
618 .name = "bitmap",
619 .get = get_bitmap,
620 .put = put_bitmap,
621};
622
623/* get for QTAILQ
624 * meta data about the QTAILQ is encoded in a VMStateField structure
625 */
626static int get_qtailq(QEMUFile *f, void *pv, size_t unused_size,
627 const VMStateField *field)
628{
629 int ret = 0;
630 const VMStateDescription *vmsd = field->vmsd;
631 /* size of a QTAILQ element */
632 size_t size = field->size;
633 /* offset of the QTAILQ entry in a QTAILQ element */
634 size_t entry_offset = field->start;
635 int version_id = field->version_id;
636 void *elm;
637
638 trace_get_qtailq(vmsd->name, version_id);
639 if (version_id > vmsd->version_id) {
640 error_report("%s %s", vmsd->name, "too new");
641 trace_get_qtailq_end(vmsd->name, "too new", -EINVAL);
642
643 return -EINVAL;
644 }
645 if (version_id < vmsd->minimum_version_id) {
646 error_report("%s %s", vmsd->name, "too old");
647 trace_get_qtailq_end(vmsd->name, "too old", -EINVAL);
648 return -EINVAL;
649 }
650
651 while (qemu_get_byte(f)) {
652 elm = g_malloc(size);
653 ret = vmstate_load_state(f, vmsd, elm, version_id);
654 if (ret) {
655 return ret;
656 }
657 QTAILQ_RAW_INSERT_TAIL(pv, elm, entry_offset);
658 }
659
660 trace_get_qtailq_end(vmsd->name, "end", ret);
661 return ret;
662}
663
664/* put for QTAILQ */
665static int put_qtailq(QEMUFile *f, void *pv, size_t unused_size,
666 const VMStateField *field, QJSON *vmdesc)
667{
668 const VMStateDescription *vmsd = field->vmsd;
669 /* offset of the QTAILQ entry in a QTAILQ element*/
670 size_t entry_offset = field->start;
671 void *elm;
672 int ret;
673
674 trace_put_qtailq(vmsd->name, vmsd->version_id);
675
676 QTAILQ_RAW_FOREACH(elm, pv, entry_offset) {
677 qemu_put_byte(f, true);
678 ret = vmstate_save_state(f, vmsd, elm, vmdesc);
679 if (ret) {
680 return ret;
681 }
682 }
683 qemu_put_byte(f, false);
684
685 trace_put_qtailq_end(vmsd->name, "end");
686
687 return 0;
688}
689const VMStateInfo vmstate_info_qtailq = {
690 .name = "qtailq",
691 .get = get_qtailq,
692 .put = put_qtailq,
693};
694
695struct put_gtree_data {
696 QEMUFile *f;
697 const VMStateDescription *key_vmsd;
698 const VMStateDescription *val_vmsd;
699 QJSON *vmdesc;
700 int ret;
701};
702
703static gboolean put_gtree_elem(gpointer key, gpointer value, gpointer data)
704{
705 struct put_gtree_data *capsule = (struct put_gtree_data *)data;
706 QEMUFile *f = capsule->f;
707 int ret;
708
709 qemu_put_byte(f, true);
710
711 /* put the key */
712 if (!capsule->key_vmsd) {
713 qemu_put_be64(f, (uint64_t)(uintptr_t)(key)); /* direct key */
714 } else {
715 ret = vmstate_save_state(f, capsule->key_vmsd, key, capsule->vmdesc);
716 if (ret) {
717 capsule->ret = ret;
718 return true;
719 }
720 }
721
722 /* put the data */
723 ret = vmstate_save_state(f, capsule->val_vmsd, value, capsule->vmdesc);
724 if (ret) {
725 capsule->ret = ret;
726 return true;
727 }
728 return false;
729}
730
731static int put_gtree(QEMUFile *f, void *pv, size_t unused_size,
732 const VMStateField *field, QJSON *vmdesc)
733{
734 bool direct_key = (!field->start);
735 const VMStateDescription *key_vmsd = direct_key ? NULL : &field->vmsd[1];
736 const VMStateDescription *val_vmsd = &field->vmsd[0];
737 const char *key_vmsd_name = direct_key ? "direct" : key_vmsd->name;
738 struct put_gtree_data capsule = {
739 .f = f,
740 .key_vmsd = key_vmsd,
741 .val_vmsd = val_vmsd,
742 .vmdesc = vmdesc,
743 .ret = 0};
744 GTree **pval = pv;
745 GTree *tree = *pval;
746 uint32_t nnodes = g_tree_nnodes(tree);
747 int ret;
748
749 trace_put_gtree(field->name, key_vmsd_name, val_vmsd->name, nnodes);
750 qemu_put_be32(f, nnodes);
751 g_tree_foreach(tree, put_gtree_elem, (gpointer)&capsule);
752 qemu_put_byte(f, false);
753 ret = capsule.ret;
754 if (ret) {
755 error_report("%s : failed to save gtree (%d)", field->name, ret);
756 }
757 trace_put_gtree_end(field->name, key_vmsd_name, val_vmsd->name, ret);
758 return ret;
759}
760
761static int get_gtree(QEMUFile *f, void *pv, size_t unused_size,
762 const VMStateField *field)
763{
764 bool direct_key = (!field->start);
765 const VMStateDescription *key_vmsd = direct_key ? NULL : &field->vmsd[1];
766 const VMStateDescription *val_vmsd = &field->vmsd[0];
767 const char *key_vmsd_name = direct_key ? "direct" : key_vmsd->name;
768 int version_id = field->version_id;
769 size_t key_size = field->start;
770 size_t val_size = field->size;
771 int nnodes, count = 0;
772 GTree **pval = pv;
773 GTree *tree = *pval;
774 void *key, *val;
775 int ret = 0;
776
777 /* in case of direct key, the key vmsd can be {}, ie. check fields */
778 if (!direct_key && version_id > key_vmsd->version_id) {
779 error_report("%s %s", key_vmsd->name, "too new");
780 return -EINVAL;
781 }
782 if (!direct_key && version_id < key_vmsd->minimum_version_id) {
783 error_report("%s %s", key_vmsd->name, "too old");
784 return -EINVAL;
785 }
786 if (version_id > val_vmsd->version_id) {
787 error_report("%s %s", val_vmsd->name, "too new");
788 return -EINVAL;
789 }
790 if (version_id < val_vmsd->minimum_version_id) {
791 error_report("%s %s", val_vmsd->name, "too old");
792 return -EINVAL;
793 }
794
795 nnodes = qemu_get_be32(f);
796 trace_get_gtree(field->name, key_vmsd_name, val_vmsd->name, nnodes);
797
798 while (qemu_get_byte(f)) {
799 if ((++count) > nnodes) {
800 ret = -EINVAL;
801 break;
802 }
803 if (direct_key) {
804 key = (void *)(uintptr_t)qemu_get_be64(f);
805 } else {
806 key = g_malloc0(key_size);
807 ret = vmstate_load_state(f, key_vmsd, key, version_id);
808 if (ret) {
809 error_report("%s : failed to load %s (%d)",
810 field->name, key_vmsd->name, ret);
811 goto key_error;
812 }
813 }
814 val = g_malloc0(val_size);
815 ret = vmstate_load_state(f, val_vmsd, val, version_id);
816 if (ret) {
817 error_report("%s : failed to load %s (%d)",
818 field->name, val_vmsd->name, ret);
819 goto val_error;
820 }
821 g_tree_insert(tree, key, val);
822 }
823 if (count != nnodes) {
824 error_report("%s inconsistent stream when loading the gtree",
825 field->name);
826 return -EINVAL;
827 }
828 trace_get_gtree_end(field->name, key_vmsd_name, val_vmsd->name, ret);
829 return ret;
830val_error:
831 g_free(val);
832key_error:
833 if (!direct_key) {
834 g_free(key);
835 }
836 trace_get_gtree_end(field->name, key_vmsd_name, val_vmsd->name, ret);
837 return ret;
838}
839
840
841const VMStateInfo vmstate_info_gtree = {
842 .name = "gtree",
843 .get = get_gtree,
844 .put = put_gtree,
845};
846
847static int put_qlist(QEMUFile *f, void *pv, size_t unused_size,
848 const VMStateField *field, QJSON *vmdesc)
849{
850 const VMStateDescription *vmsd = field->vmsd;
851 /* offset of the QTAILQ entry in a QTAILQ element*/
852 size_t entry_offset = field->start;
853 void *elm;
854 int ret;
855
856 trace_put_qlist(field->name, vmsd->name, vmsd->version_id);
857 QLIST_RAW_FOREACH(elm, pv, entry_offset) {
858 qemu_put_byte(f, true);
859 ret = vmstate_save_state(f, vmsd, elm, vmdesc);
860 if (ret) {
861 error_report("%s: failed to save %s (%d)", field->name,
862 vmsd->name, ret);
863 return ret;
864 }
865 }
866 qemu_put_byte(f, false);
867 trace_put_qlist_end(field->name, vmsd->name);
868
869 return 0;
870}
871
872static int get_qlist(QEMUFile *f, void *pv, size_t unused_size,
873 const VMStateField *field)
874{
875 int ret = 0;
876 const VMStateDescription *vmsd = field->vmsd;
877 /* size of a QLIST element */
878 size_t size = field->size;
879 /* offset of the QLIST entry in a QLIST element */
880 size_t entry_offset = field->start;
881 int version_id = field->version_id;
882 void *elm, *prev = NULL;
883
884 trace_get_qlist(field->name, vmsd->name, vmsd->version_id);
885 if (version_id > vmsd->version_id) {
886 error_report("%s %s", vmsd->name, "too new");
887 return -EINVAL;
888 }
889 if (version_id < vmsd->minimum_version_id) {
890 error_report("%s %s", vmsd->name, "too old");
891 return -EINVAL;
892 }
893
894 while (qemu_get_byte(f)) {
895 elm = g_malloc(size);
896 ret = vmstate_load_state(f, vmsd, elm, version_id);
897 if (ret) {
898 error_report("%s: failed to load %s (%d)", field->name,
899 vmsd->name, ret);
900 g_free(elm);
901 return ret;
902 }
903 if (!prev) {
904 QLIST_RAW_INSERT_HEAD(pv, elm, entry_offset);
905 } else {
906 QLIST_RAW_INSERT_AFTER(pv, prev, elm, entry_offset);
907 }
908 prev = elm;
909 }
910 trace_get_qlist_end(field->name, vmsd->name);
911
912 return ret;
913}
914
915const VMStateInfo vmstate_info_qlist = {
916 .name = "qlist",
917 .get = get_qlist,
918 .put = put_qlist,
919};