2 * VMStateInfo's for basic typse
4 * Copyright (c) 2009-2017 Red Hat Inc
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.
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"
23 static int get_bool(QEMUFile *f, void *pv, size_t size,
24 const VMStateField *field)
27 *v = qemu_get_byte(f);
31 static int put_bool(QEMUFile *f, void *pv, size_t size,
32 const VMStateField *field, QJSON *vmdesc)
39 const VMStateInfo vmstate_info_bool = {
47 static int get_int8(QEMUFile *f, void *pv, size_t size,
48 const VMStateField *field)
55 static int put_int8(QEMUFile *f, void *pv, size_t size,
56 const VMStateField *field, QJSON *vmdesc)
63 const VMStateInfo vmstate_info_int8 = {
71 static int get_int16(QEMUFile *f, void *pv, size_t size,
72 const VMStateField *field)
75 qemu_get_sbe16s(f, v);
79 static int put_int16(QEMUFile *f, void *pv, size_t size,
80 const VMStateField *field, QJSON *vmdesc)
83 qemu_put_sbe16s(f, v);
87 const VMStateInfo vmstate_info_int16 = {
95 static int get_int32(QEMUFile *f, void *pv, size_t size,
96 const VMStateField *field)
99 qemu_get_sbe32s(f, v);
103 static int put_int32(QEMUFile *f, void *pv, size_t size,
104 const VMStateField *field, QJSON *vmdesc)
107 qemu_put_sbe32s(f, v);
111 const VMStateInfo vmstate_info_int32 = {
117 /* 32 bit int. See that the received value is the same than the one
120 static int get_int32_equal(QEMUFile *f, void *pv, size_t size,
121 const VMStateField *field)
125 qemu_get_sbe32s(f, &v2);
130 error_report("%" PRIx32 " != %" PRIx32, *v, v2);
131 if (field->err_hint) {
132 error_printf("%s\n", field->err_hint);
137 const VMStateInfo vmstate_info_int32_equal = {
138 .name = "int32 equal",
139 .get = get_int32_equal,
143 /* 32 bit int. Check that the received value is non-negative
144 * and less than or equal to the one in the field.
147 static int get_int32_le(QEMUFile *f, void *pv, size_t size,
148 const VMStateField *field)
152 qemu_get_sbe32s(f, &loaded);
154 if (loaded >= 0 && loaded <= *cur) {
158 error_report("Invalid value %" PRId32
159 " expecting positive value <= %" PRId32,
164 const VMStateInfo vmstate_info_int32_le = {
172 static int get_int64(QEMUFile *f, void *pv, size_t size,
173 const VMStateField *field)
176 qemu_get_sbe64s(f, v);
180 static int put_int64(QEMUFile *f, void *pv, size_t size,
181 const VMStateField *field, QJSON *vmdesc)
184 qemu_put_sbe64s(f, v);
188 const VMStateInfo vmstate_info_int64 = {
194 /* 8 bit unsigned int */
196 static int get_uint8(QEMUFile *f, void *pv, size_t size,
197 const VMStateField *field)
204 static int put_uint8(QEMUFile *f, void *pv, size_t size,
205 const VMStateField *field, QJSON *vmdesc)
212 const VMStateInfo vmstate_info_uint8 = {
218 /* 16 bit unsigned int */
220 static int get_uint16(QEMUFile *f, void *pv, size_t size,
221 const VMStateField *field)
224 qemu_get_be16s(f, v);
228 static int put_uint16(QEMUFile *f, void *pv, size_t size,
229 const VMStateField *field, QJSON *vmdesc)
232 qemu_put_be16s(f, v);
236 const VMStateInfo vmstate_info_uint16 = {
242 /* 32 bit unsigned int */
244 static int get_uint32(QEMUFile *f, void *pv, size_t size,
245 const VMStateField *field)
248 qemu_get_be32s(f, v);
252 static int put_uint32(QEMUFile *f, void *pv, size_t size,
253 const VMStateField *field, QJSON *vmdesc)
256 qemu_put_be32s(f, v);
260 const VMStateInfo vmstate_info_uint32 = {
266 /* 32 bit uint. See that the received value is the same than the one
269 static int get_uint32_equal(QEMUFile *f, void *pv, size_t size,
270 const VMStateField *field)
274 qemu_get_be32s(f, &v2);
279 error_report("%" PRIx32 " != %" PRIx32, *v, v2);
280 if (field->err_hint) {
281 error_printf("%s\n", field->err_hint);
286 const VMStateInfo vmstate_info_uint32_equal = {
287 .name = "uint32 equal",
288 .get = get_uint32_equal,
292 /* 64 bit unsigned int */
294 static int get_uint64(QEMUFile *f, void *pv, size_t size,
295 const VMStateField *field)
298 qemu_get_be64s(f, v);
302 static int put_uint64(QEMUFile *f, void *pv, size_t size,
303 const VMStateField *field, QJSON *vmdesc)
306 qemu_put_be64s(f, v);
310 const VMStateInfo vmstate_info_uint64 = {
316 static int get_nullptr(QEMUFile *f, void *pv, size_t size,
317 const VMStateField *field)
320 if (qemu_get_byte(f) == VMS_NULLPTR_MARKER) {
323 error_report("vmstate: get_nullptr expected VMS_NULLPTR_MARKER");
327 static int put_nullptr(QEMUFile *f, void *pv, size_t size,
328 const VMStateField *field, QJSON *vmdesc)
332 qemu_put_byte(f, VMS_NULLPTR_MARKER);
335 error_report("vmstate: put_nullptr must be called with pv == NULL");
339 const VMStateInfo vmstate_info_nullptr = {
345 /* 64 bit unsigned int. See that the received value is the same than the one
348 static int get_uint64_equal(QEMUFile *f, void *pv, size_t size,
349 const VMStateField *field)
353 qemu_get_be64s(f, &v2);
358 error_report("%" PRIx64 " != %" PRIx64, *v, v2);
359 if (field->err_hint) {
360 error_printf("%s\n", field->err_hint);
365 const VMStateInfo vmstate_info_uint64_equal = {
366 .name = "int64 equal",
367 .get = get_uint64_equal,
371 /* 8 bit int. See that the received value is the same than the one
374 static int get_uint8_equal(QEMUFile *f, void *pv, size_t size,
375 const VMStateField *field)
384 error_report("%x != %x", *v, v2);
385 if (field->err_hint) {
386 error_printf("%s\n", field->err_hint);
391 const VMStateInfo vmstate_info_uint8_equal = {
392 .name = "uint8 equal",
393 .get = get_uint8_equal,
397 /* 16 bit unsigned int int. See that the received value is the same than the one
400 static int get_uint16_equal(QEMUFile *f, void *pv, size_t size,
401 const VMStateField *field)
405 qemu_get_be16s(f, &v2);
410 error_report("%x != %x", *v, v2);
411 if (field->err_hint) {
412 error_printf("%s\n", field->err_hint);
417 const VMStateInfo vmstate_info_uint16_equal = {
418 .name = "uint16 equal",
419 .get = get_uint16_equal,
425 static int get_float64(QEMUFile *f, void *pv, size_t size,
426 const VMStateField *field)
430 *v = make_float64(qemu_get_be64(f));
434 static int put_float64(QEMUFile *f, void *pv, size_t size,
435 const VMStateField *field, QJSON *vmdesc)
439 qemu_put_be64(f, float64_val(*v));
443 const VMStateInfo vmstate_info_float64 = {
449 /* CPU_DoubleU type */
451 static int get_cpudouble(QEMUFile *f, void *pv, size_t size,
452 const VMStateField *field)
455 qemu_get_be32s(f, &v->l.upper);
456 qemu_get_be32s(f, &v->l.lower);
460 static int put_cpudouble(QEMUFile *f, void *pv, size_t size,
461 const VMStateField *field, QJSON *vmdesc)
464 qemu_put_be32s(f, &v->l.upper);
465 qemu_put_be32s(f, &v->l.lower);
469 const VMStateInfo vmstate_info_cpudouble = {
470 .name = "CPU_Double_U",
471 .get = get_cpudouble,
472 .put = put_cpudouble,
475 /* uint8_t buffers */
477 static int get_buffer(QEMUFile *f, void *pv, size_t size,
478 const VMStateField *field)
481 qemu_get_buffer(f, v, size);
485 static int put_buffer(QEMUFile *f, void *pv, size_t size,
486 const VMStateField *field, QJSON *vmdesc)
489 qemu_put_buffer(f, v, size);
493 const VMStateInfo vmstate_info_buffer = {
499 /* unused buffers: space that was used for some fields that are
500 not useful anymore */
502 static int get_unused_buffer(QEMUFile *f, void *pv, size_t size,
503 const VMStateField *field)
509 block_len = MIN(sizeof(buf), size);
511 qemu_get_buffer(f, buf, block_len);
516 static int put_unused_buffer(QEMUFile *f, void *pv, size_t size,
517 const VMStateField *field, QJSON *vmdesc)
519 static const uint8_t buf[1024];
523 block_len = MIN(sizeof(buf), size);
525 qemu_put_buffer(f, buf, block_len);
531 const VMStateInfo vmstate_info_unused_buffer = {
532 .name = "unused_buffer",
533 .get = get_unused_buffer,
534 .put = put_unused_buffer,
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
543 static int get_tmp(QEMUFile *f, void *pv, size_t size,
544 const VMStateField *field)
547 const VMStateDescription *vmsd = field->vmsd;
548 int version_id = field->version_id;
549 void *tmp = g_malloc(size);
551 /* Writes the parent field which is at the start of the tmp */
553 ret = vmstate_load_state(f, vmsd, tmp, version_id);
558 static int put_tmp(QEMUFile *f, void *pv, size_t size,
559 const VMStateField *field, QJSON *vmdesc)
561 const VMStateDescription *vmsd = field->vmsd;
562 void *tmp = g_malloc(size);
565 /* Writes the parent field which is at the start of the tmp */
567 ret = vmstate_save_state(f, vmsd, tmp, vmdesc);
573 const VMStateInfo vmstate_info_tmp = {
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.
584 /* This is the number of 64 bit words sent over the wire */
585 #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64)
586 static int get_bitmap(QEMUFile *f, void *pv, size_t size,
587 const VMStateField *field)
589 unsigned long *bmp = pv;
591 for (i = 0; i < BITS_TO_U64S(size); i++) {
592 uint64_t w = qemu_get_be64(f);
594 if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) {
595 bmp[idx++] = w >> 32;
601 static int put_bitmap(QEMUFile *f, void *pv, size_t size,
602 const VMStateField *field, QJSON *vmdesc)
604 unsigned long *bmp = pv;
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;
617 const VMStateInfo vmstate_info_bitmap = {
624 * meta data about the QTAILQ is encoded in a VMStateField structure
626 static int get_qtailq(QEMUFile *f, void *pv, size_t unused_size,
627 const VMStateField *field)
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;
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);
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);
651 while (qemu_get_byte(f)) {
652 elm = g_malloc(size);
653 ret = vmstate_load_state(f, vmsd, elm, version_id);
657 QTAILQ_RAW_INSERT_TAIL(pv, elm, entry_offset);
660 trace_get_qtailq_end(vmsd->name, "end", ret);
665 static int put_qtailq(QEMUFile *f, void *pv, size_t unused_size,
666 const VMStateField *field, QJSON *vmdesc)
668 const VMStateDescription *vmsd = field->vmsd;
669 /* offset of the QTAILQ entry in a QTAILQ element*/
670 size_t entry_offset = field->start;
674 trace_put_qtailq(vmsd->name, vmsd->version_id);
676 QTAILQ_RAW_FOREACH(elm, pv, entry_offset) {
677 qemu_put_byte(f, true);
678 ret = vmstate_save_state(f, vmsd, elm, vmdesc);
683 qemu_put_byte(f, false);
685 trace_put_qtailq_end(vmsd->name, "end");
689 const VMStateInfo vmstate_info_qtailq = {