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Commit | Line | Data |
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b6fcfa59 EH |
1 | #include "qemu-common.h" |
2 | #include "migration/migration.h" | |
3 | #include "migration/qemu-file.h" | |
4 | #include "migration/vmstate.h" | |
5 | #include "qemu/bitops.h" | |
6a64b644 | 6 | #include "qemu/error-report.h" |
9013dca5 | 7 | #include "trace.h" |
b6fcfa59 EH |
8 | |
9 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, | |
10 | void *opaque); | |
11 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
12 | void *opaque); | |
13 | ||
35fc1f71 MT |
14 | static int vmstate_n_elems(void *opaque, VMStateField *field) |
15 | { | |
16 | int n_elems = 1; | |
17 | ||
18 | if (field->flags & VMS_ARRAY) { | |
19 | n_elems = field->num; | |
20 | } else if (field->flags & VMS_VARRAY_INT32) { | |
21 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
22 | } else if (field->flags & VMS_VARRAY_UINT32) { | |
23 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
24 | } else if (field->flags & VMS_VARRAY_UINT16) { | |
25 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
26 | } else if (field->flags & VMS_VARRAY_UINT8) { | |
27 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
28 | } | |
29 | ||
30 | return n_elems; | |
31 | } | |
32 | ||
33 | static int vmstate_size(void *opaque, VMStateField *field) | |
34 | { | |
35 | int size = field->size; | |
36 | ||
37 | if (field->flags & VMS_VBUFFER) { | |
38 | size = *(int32_t *)(opaque+field->size_offset); | |
39 | if (field->flags & VMS_MULTIPLY) { | |
40 | size *= field->size; | |
41 | } | |
42 | } | |
43 | ||
44 | return size; | |
45 | } | |
46 | ||
f32935ea | 47 | static void *vmstate_base_addr(void *opaque, VMStateField *field, bool alloc) |
35fc1f71 MT |
48 | { |
49 | void *base_addr = opaque + field->offset; | |
50 | ||
51 | if (field->flags & VMS_POINTER) { | |
f32935ea | 52 | if (alloc && (field->flags & VMS_ALLOC)) { |
94ed706d AK |
53 | gsize size = 0; |
54 | if (field->flags & VMS_VBUFFER) { | |
55 | size = vmstate_size(opaque, field); | |
56 | } else { | |
57 | int n_elems = vmstate_n_elems(opaque, field); | |
58 | if (n_elems) { | |
59 | size = n_elems * field->size; | |
60 | } | |
61 | } | |
62 | if (size) { | |
f32935ea AK |
63 | *((void **)base_addr + field->start) = g_malloc(size); |
64 | } | |
65 | } | |
35fc1f71 MT |
66 | base_addr = *(void **)base_addr + field->start; |
67 | } | |
68 | ||
69 | return base_addr; | |
70 | } | |
71 | ||
b6fcfa59 EH |
72 | int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
73 | void *opaque, int version_id) | |
74 | { | |
75 | VMStateField *field = vmsd->fields; | |
a5df2a02 | 76 | int ret = 0; |
b6fcfa59 | 77 | |
a5df2a02 | 78 | trace_vmstate_load_state(vmsd->name, version_id); |
b6fcfa59 | 79 | if (version_id > vmsd->version_id) { |
a5df2a02 | 80 | trace_vmstate_load_state_end(vmsd->name, "too new", -EINVAL); |
b6fcfa59 EH |
81 | return -EINVAL; |
82 | } | |
b6fcfa59 | 83 | if (version_id < vmsd->minimum_version_id) { |
767adce2 PM |
84 | if (vmsd->load_state_old && |
85 | version_id >= vmsd->minimum_version_id_old) { | |
a5df2a02 DDAG |
86 | ret = vmsd->load_state_old(f, opaque, version_id); |
87 | trace_vmstate_load_state_end(vmsd->name, "old path", ret); | |
88 | return ret; | |
767adce2 | 89 | } |
a5df2a02 | 90 | trace_vmstate_load_state_end(vmsd->name, "too old", -EINVAL); |
767adce2 | 91 | return -EINVAL; |
b6fcfa59 EH |
92 | } |
93 | if (vmsd->pre_load) { | |
94 | int ret = vmsd->pre_load(opaque); | |
95 | if (ret) { | |
96 | return ret; | |
97 | } | |
98 | } | |
99 | while (field->name) { | |
a5df2a02 | 100 | trace_vmstate_load_state_field(vmsd->name, field->name); |
b6fcfa59 EH |
101 | if ((field->field_exists && |
102 | field->field_exists(opaque, version_id)) || | |
103 | (!field->field_exists && | |
104 | field->version_id <= version_id)) { | |
f32935ea | 105 | void *base_addr = vmstate_base_addr(opaque, field, true); |
35fc1f71 MT |
106 | int i, n_elems = vmstate_n_elems(opaque, field); |
107 | int size = vmstate_size(opaque, field); | |
108 | ||
b6fcfa59 EH |
109 | for (i = 0; i < n_elems; i++) { |
110 | void *addr = base_addr + size * i; | |
111 | ||
112 | if (field->flags & VMS_ARRAY_OF_POINTER) { | |
113 | addr = *(void **)addr; | |
114 | } | |
115 | if (field->flags & VMS_STRUCT) { | |
116 | ret = vmstate_load_state(f, field->vmsd, addr, | |
117 | field->vmsd->version_id); | |
118 | } else { | |
119 | ret = field->info->get(f, addr, size); | |
120 | ||
121 | } | |
13cde508 JQ |
122 | if (ret >= 0) { |
123 | ret = qemu_file_get_error(f); | |
124 | } | |
b6fcfa59 | 125 | if (ret < 0) { |
13cde508 | 126 | qemu_file_set_error(f, ret); |
9013dca5 | 127 | trace_vmstate_load_field_error(field->name, ret); |
b6fcfa59 EH |
128 | return ret; |
129 | } | |
130 | } | |
5bf81c8d | 131 | } else if (field->flags & VMS_MUST_EXIST) { |
6a64b644 DDAG |
132 | error_report("Input validation failed: %s/%s", |
133 | vmsd->name, field->name); | |
5bf81c8d | 134 | return -1; |
b6fcfa59 EH |
135 | } |
136 | field++; | |
137 | } | |
138 | ret = vmstate_subsection_load(f, vmsd, opaque); | |
139 | if (ret != 0) { | |
140 | return ret; | |
141 | } | |
142 | if (vmsd->post_load) { | |
a5df2a02 | 143 | ret = vmsd->post_load(opaque, version_id); |
b6fcfa59 | 144 | } |
a5df2a02 DDAG |
145 | trace_vmstate_load_state_end(vmsd->name, "end", ret); |
146 | return ret; | |
b6fcfa59 EH |
147 | } |
148 | ||
149 | void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, | |
150 | void *opaque) | |
151 | { | |
152 | VMStateField *field = vmsd->fields; | |
153 | ||
154 | if (vmsd->pre_save) { | |
155 | vmsd->pre_save(opaque); | |
156 | } | |
157 | while (field->name) { | |
158 | if (!field->field_exists || | |
159 | field->field_exists(opaque, vmsd->version_id)) { | |
f32935ea | 160 | void *base_addr = vmstate_base_addr(opaque, field, false); |
35fc1f71 MT |
161 | int i, n_elems = vmstate_n_elems(opaque, field); |
162 | int size = vmstate_size(opaque, field); | |
163 | ||
b6fcfa59 EH |
164 | for (i = 0; i < n_elems; i++) { |
165 | void *addr = base_addr + size * i; | |
166 | ||
167 | if (field->flags & VMS_ARRAY_OF_POINTER) { | |
168 | addr = *(void **)addr; | |
169 | } | |
170 | if (field->flags & VMS_STRUCT) { | |
171 | vmstate_save_state(f, field->vmsd, addr); | |
172 | } else { | |
173 | field->info->put(f, addr, size); | |
174 | } | |
175 | } | |
5bf81c8d MT |
176 | } else { |
177 | if (field->flags & VMS_MUST_EXIST) { | |
6a64b644 | 178 | error_report("Output state validation failed: %s/%s", |
5bf81c8d MT |
179 | vmsd->name, field->name); |
180 | assert(!(field->flags & VMS_MUST_EXIST)); | |
181 | } | |
b6fcfa59 EH |
182 | } |
183 | field++; | |
184 | } | |
185 | vmstate_subsection_save(f, vmsd, opaque); | |
186 | } | |
187 | ||
188 | static const VMStateDescription * | |
189 | vmstate_get_subsection(const VMStateSubsection *sub, char *idstr) | |
190 | { | |
191 | while (sub && sub->needed) { | |
192 | if (strcmp(idstr, sub->vmsd->name) == 0) { | |
193 | return sub->vmsd; | |
194 | } | |
195 | sub++; | |
196 | } | |
197 | return NULL; | |
198 | } | |
199 | ||
200 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
201 | void *opaque) | |
202 | { | |
a5df2a02 DDAG |
203 | trace_vmstate_subsection_load(vmsd->name); |
204 | ||
b6fcfa59 EH |
205 | while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) { |
206 | char idstr[256]; | |
207 | int ret; | |
208 | uint8_t version_id, len, size; | |
209 | const VMStateDescription *sub_vmsd; | |
210 | ||
211 | len = qemu_peek_byte(f, 1); | |
212 | if (len < strlen(vmsd->name) + 1) { | |
213 | /* subsection name has be be "section_name/a" */ | |
a5df2a02 | 214 | trace_vmstate_subsection_load_bad(vmsd->name, "(short)"); |
b6fcfa59 EH |
215 | return 0; |
216 | } | |
217 | size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2); | |
218 | if (size != len) { | |
a5df2a02 | 219 | trace_vmstate_subsection_load_bad(vmsd->name, "(peek fail)"); |
b6fcfa59 EH |
220 | return 0; |
221 | } | |
222 | idstr[size] = 0; | |
223 | ||
224 | if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) { | |
a5df2a02 | 225 | trace_vmstate_subsection_load_bad(vmsd->name, idstr); |
b6fcfa59 EH |
226 | /* it don't have a valid subsection name */ |
227 | return 0; | |
228 | } | |
229 | sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr); | |
230 | if (sub_vmsd == NULL) { | |
a5df2a02 | 231 | trace_vmstate_subsection_load_bad(vmsd->name, "(lookup)"); |
b6fcfa59 EH |
232 | return -ENOENT; |
233 | } | |
234 | qemu_file_skip(f, 1); /* subsection */ | |
235 | qemu_file_skip(f, 1); /* len */ | |
236 | qemu_file_skip(f, len); /* idstr */ | |
237 | version_id = qemu_get_be32(f); | |
238 | ||
239 | ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); | |
240 | if (ret) { | |
a5df2a02 | 241 | trace_vmstate_subsection_load_bad(vmsd->name, "(child)"); |
b6fcfa59 EH |
242 | return ret; |
243 | } | |
244 | } | |
a5df2a02 DDAG |
245 | |
246 | trace_vmstate_subsection_load_good(vmsd->name); | |
b6fcfa59 EH |
247 | return 0; |
248 | } | |
249 | ||
250 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, | |
251 | void *opaque) | |
252 | { | |
253 | const VMStateSubsection *sub = vmsd->subsections; | |
254 | ||
255 | while (sub && sub->needed) { | |
256 | if (sub->needed(opaque)) { | |
257 | const VMStateDescription *vmsd = sub->vmsd; | |
258 | uint8_t len; | |
259 | ||
260 | qemu_put_byte(f, QEMU_VM_SUBSECTION); | |
261 | len = strlen(vmsd->name); | |
262 | qemu_put_byte(f, len); | |
263 | qemu_put_buffer(f, (uint8_t *)vmsd->name, len); | |
264 | qemu_put_be32(f, vmsd->version_id); | |
265 | vmstate_save_state(f, vmsd, opaque); | |
266 | } | |
267 | sub++; | |
268 | } | |
269 | } | |
270 | ||
271 | /* bool */ | |
272 | ||
273 | static int get_bool(QEMUFile *f, void *pv, size_t size) | |
274 | { | |
275 | bool *v = pv; | |
276 | *v = qemu_get_byte(f); | |
277 | return 0; | |
278 | } | |
279 | ||
280 | static void put_bool(QEMUFile *f, void *pv, size_t size) | |
281 | { | |
282 | bool *v = pv; | |
283 | qemu_put_byte(f, *v); | |
284 | } | |
285 | ||
286 | const VMStateInfo vmstate_info_bool = { | |
287 | .name = "bool", | |
288 | .get = get_bool, | |
289 | .put = put_bool, | |
290 | }; | |
291 | ||
292 | /* 8 bit int */ | |
293 | ||
294 | static int get_int8(QEMUFile *f, void *pv, size_t size) | |
295 | { | |
296 | int8_t *v = pv; | |
297 | qemu_get_s8s(f, v); | |
298 | return 0; | |
299 | } | |
300 | ||
301 | static void put_int8(QEMUFile *f, void *pv, size_t size) | |
302 | { | |
303 | int8_t *v = pv; | |
304 | qemu_put_s8s(f, v); | |
305 | } | |
306 | ||
307 | const VMStateInfo vmstate_info_int8 = { | |
308 | .name = "int8", | |
309 | .get = get_int8, | |
310 | .put = put_int8, | |
311 | }; | |
312 | ||
313 | /* 16 bit int */ | |
314 | ||
315 | static int get_int16(QEMUFile *f, void *pv, size_t size) | |
316 | { | |
317 | int16_t *v = pv; | |
318 | qemu_get_sbe16s(f, v); | |
319 | return 0; | |
320 | } | |
321 | ||
322 | static void put_int16(QEMUFile *f, void *pv, size_t size) | |
323 | { | |
324 | int16_t *v = pv; | |
325 | qemu_put_sbe16s(f, v); | |
326 | } | |
327 | ||
328 | const VMStateInfo vmstate_info_int16 = { | |
329 | .name = "int16", | |
330 | .get = get_int16, | |
331 | .put = put_int16, | |
332 | }; | |
333 | ||
334 | /* 32 bit int */ | |
335 | ||
336 | static int get_int32(QEMUFile *f, void *pv, size_t size) | |
337 | { | |
338 | int32_t *v = pv; | |
339 | qemu_get_sbe32s(f, v); | |
340 | return 0; | |
341 | } | |
342 | ||
343 | static void put_int32(QEMUFile *f, void *pv, size_t size) | |
344 | { | |
345 | int32_t *v = pv; | |
346 | qemu_put_sbe32s(f, v); | |
347 | } | |
348 | ||
349 | const VMStateInfo vmstate_info_int32 = { | |
350 | .name = "int32", | |
351 | .get = get_int32, | |
352 | .put = put_int32, | |
353 | }; | |
354 | ||
355 | /* 32 bit int. See that the received value is the same than the one | |
356 | in the field */ | |
357 | ||
358 | static int get_int32_equal(QEMUFile *f, void *pv, size_t size) | |
359 | { | |
360 | int32_t *v = pv; | |
361 | int32_t v2; | |
362 | qemu_get_sbe32s(f, &v2); | |
363 | ||
364 | if (*v == v2) { | |
365 | return 0; | |
366 | } | |
367 | return -EINVAL; | |
368 | } | |
369 | ||
370 | const VMStateInfo vmstate_info_int32_equal = { | |
371 | .name = "int32 equal", | |
372 | .get = get_int32_equal, | |
373 | .put = put_int32, | |
374 | }; | |
375 | ||
d2ef4b61 MT |
376 | /* 32 bit int. Check that the received value is non-negative |
377 | * and less than or equal to the one in the field. | |
378 | */ | |
b6fcfa59 EH |
379 | |
380 | static int get_int32_le(QEMUFile *f, void *pv, size_t size) | |
381 | { | |
24a370ef DDAG |
382 | int32_t *cur = pv; |
383 | int32_t loaded; | |
384 | qemu_get_sbe32s(f, &loaded); | |
b6fcfa59 | 385 | |
d2ef4b61 | 386 | if (loaded >= 0 && loaded <= *cur) { |
24a370ef | 387 | *cur = loaded; |
b6fcfa59 EH |
388 | return 0; |
389 | } | |
390 | return -EINVAL; | |
391 | } | |
392 | ||
393 | const VMStateInfo vmstate_info_int32_le = { | |
24a370ef | 394 | .name = "int32 le", |
b6fcfa59 EH |
395 | .get = get_int32_le, |
396 | .put = put_int32, | |
397 | }; | |
398 | ||
399 | /* 64 bit int */ | |
400 | ||
401 | static int get_int64(QEMUFile *f, void *pv, size_t size) | |
402 | { | |
403 | int64_t *v = pv; | |
404 | qemu_get_sbe64s(f, v); | |
405 | return 0; | |
406 | } | |
407 | ||
408 | static void put_int64(QEMUFile *f, void *pv, size_t size) | |
409 | { | |
410 | int64_t *v = pv; | |
411 | qemu_put_sbe64s(f, v); | |
412 | } | |
413 | ||
414 | const VMStateInfo vmstate_info_int64 = { | |
415 | .name = "int64", | |
416 | .get = get_int64, | |
417 | .put = put_int64, | |
418 | }; | |
419 | ||
420 | /* 8 bit unsigned int */ | |
421 | ||
422 | static int get_uint8(QEMUFile *f, void *pv, size_t size) | |
423 | { | |
424 | uint8_t *v = pv; | |
425 | qemu_get_8s(f, v); | |
426 | return 0; | |
427 | } | |
428 | ||
429 | static void put_uint8(QEMUFile *f, void *pv, size_t size) | |
430 | { | |
431 | uint8_t *v = pv; | |
432 | qemu_put_8s(f, v); | |
433 | } | |
434 | ||
435 | const VMStateInfo vmstate_info_uint8 = { | |
436 | .name = "uint8", | |
437 | .get = get_uint8, | |
438 | .put = put_uint8, | |
439 | }; | |
440 | ||
441 | /* 16 bit unsigned int */ | |
442 | ||
443 | static int get_uint16(QEMUFile *f, void *pv, size_t size) | |
444 | { | |
445 | uint16_t *v = pv; | |
446 | qemu_get_be16s(f, v); | |
447 | return 0; | |
448 | } | |
449 | ||
450 | static void put_uint16(QEMUFile *f, void *pv, size_t size) | |
451 | { | |
452 | uint16_t *v = pv; | |
453 | qemu_put_be16s(f, v); | |
454 | } | |
455 | ||
456 | const VMStateInfo vmstate_info_uint16 = { | |
457 | .name = "uint16", | |
458 | .get = get_uint16, | |
459 | .put = put_uint16, | |
460 | }; | |
461 | ||
462 | /* 32 bit unsigned int */ | |
463 | ||
464 | static int get_uint32(QEMUFile *f, void *pv, size_t size) | |
465 | { | |
466 | uint32_t *v = pv; | |
467 | qemu_get_be32s(f, v); | |
468 | return 0; | |
469 | } | |
470 | ||
471 | static void put_uint32(QEMUFile *f, void *pv, size_t size) | |
472 | { | |
473 | uint32_t *v = pv; | |
474 | qemu_put_be32s(f, v); | |
475 | } | |
476 | ||
477 | const VMStateInfo vmstate_info_uint32 = { | |
478 | .name = "uint32", | |
479 | .get = get_uint32, | |
480 | .put = put_uint32, | |
481 | }; | |
482 | ||
483 | /* 32 bit uint. See that the received value is the same than the one | |
484 | in the field */ | |
485 | ||
486 | static int get_uint32_equal(QEMUFile *f, void *pv, size_t size) | |
487 | { | |
488 | uint32_t *v = pv; | |
489 | uint32_t v2; | |
490 | qemu_get_be32s(f, &v2); | |
491 | ||
492 | if (*v == v2) { | |
493 | return 0; | |
494 | } | |
495 | return -EINVAL; | |
496 | } | |
497 | ||
498 | const VMStateInfo vmstate_info_uint32_equal = { | |
499 | .name = "uint32 equal", | |
500 | .get = get_uint32_equal, | |
501 | .put = put_uint32, | |
502 | }; | |
503 | ||
504 | /* 64 bit unsigned int */ | |
505 | ||
506 | static int get_uint64(QEMUFile *f, void *pv, size_t size) | |
507 | { | |
508 | uint64_t *v = pv; | |
509 | qemu_get_be64s(f, v); | |
510 | return 0; | |
511 | } | |
512 | ||
513 | static void put_uint64(QEMUFile *f, void *pv, size_t size) | |
514 | { | |
515 | uint64_t *v = pv; | |
516 | qemu_put_be64s(f, v); | |
517 | } | |
518 | ||
519 | const VMStateInfo vmstate_info_uint64 = { | |
520 | .name = "uint64", | |
521 | .get = get_uint64, | |
522 | .put = put_uint64, | |
523 | }; | |
524 | ||
525 | /* 64 bit unsigned int. See that the received value is the same than the one | |
526 | in the field */ | |
527 | ||
528 | static int get_uint64_equal(QEMUFile *f, void *pv, size_t size) | |
529 | { | |
530 | uint64_t *v = pv; | |
531 | uint64_t v2; | |
532 | qemu_get_be64s(f, &v2); | |
533 | ||
534 | if (*v == v2) { | |
535 | return 0; | |
536 | } | |
537 | return -EINVAL; | |
538 | } | |
539 | ||
540 | const VMStateInfo vmstate_info_uint64_equal = { | |
541 | .name = "int64 equal", | |
542 | .get = get_uint64_equal, | |
543 | .put = put_uint64, | |
544 | }; | |
545 | ||
546 | /* 8 bit int. See that the received value is the same than the one | |
547 | in the field */ | |
548 | ||
549 | static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) | |
550 | { | |
551 | uint8_t *v = pv; | |
552 | uint8_t v2; | |
553 | qemu_get_8s(f, &v2); | |
554 | ||
555 | if (*v == v2) { | |
556 | return 0; | |
557 | } | |
558 | return -EINVAL; | |
559 | } | |
560 | ||
561 | const VMStateInfo vmstate_info_uint8_equal = { | |
562 | .name = "uint8 equal", | |
563 | .get = get_uint8_equal, | |
564 | .put = put_uint8, | |
565 | }; | |
566 | ||
567 | /* 16 bit unsigned int int. See that the received value is the same than the one | |
568 | in the field */ | |
569 | ||
570 | static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) | |
571 | { | |
572 | uint16_t *v = pv; | |
573 | uint16_t v2; | |
574 | qemu_get_be16s(f, &v2); | |
575 | ||
576 | if (*v == v2) { | |
577 | return 0; | |
578 | } | |
579 | return -EINVAL; | |
580 | } | |
581 | ||
582 | const VMStateInfo vmstate_info_uint16_equal = { | |
583 | .name = "uint16 equal", | |
584 | .get = get_uint16_equal, | |
585 | .put = put_uint16, | |
586 | }; | |
587 | ||
588 | /* floating point */ | |
589 | ||
590 | static int get_float64(QEMUFile *f, void *pv, size_t size) | |
591 | { | |
592 | float64 *v = pv; | |
593 | ||
594 | *v = make_float64(qemu_get_be64(f)); | |
595 | return 0; | |
596 | } | |
597 | ||
598 | static void put_float64(QEMUFile *f, void *pv, size_t size) | |
599 | { | |
600 | uint64_t *v = pv; | |
601 | ||
602 | qemu_put_be64(f, float64_val(*v)); | |
603 | } | |
604 | ||
605 | const VMStateInfo vmstate_info_float64 = { | |
606 | .name = "float64", | |
607 | .get = get_float64, | |
608 | .put = put_float64, | |
609 | }; | |
610 | ||
611 | /* uint8_t buffers */ | |
612 | ||
613 | static int get_buffer(QEMUFile *f, void *pv, size_t size) | |
614 | { | |
615 | uint8_t *v = pv; | |
616 | qemu_get_buffer(f, v, size); | |
617 | return 0; | |
618 | } | |
619 | ||
620 | static void put_buffer(QEMUFile *f, void *pv, size_t size) | |
621 | { | |
622 | uint8_t *v = pv; | |
623 | qemu_put_buffer(f, v, size); | |
624 | } | |
625 | ||
626 | const VMStateInfo vmstate_info_buffer = { | |
627 | .name = "buffer", | |
628 | .get = get_buffer, | |
629 | .put = put_buffer, | |
630 | }; | |
631 | ||
632 | /* unused buffers: space that was used for some fields that are | |
633 | not useful anymore */ | |
634 | ||
635 | static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
636 | { | |
637 | uint8_t buf[1024]; | |
638 | int block_len; | |
639 | ||
640 | while (size > 0) { | |
641 | block_len = MIN(sizeof(buf), size); | |
642 | size -= block_len; | |
643 | qemu_get_buffer(f, buf, block_len); | |
644 | } | |
645 | return 0; | |
646 | } | |
647 | ||
648 | static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) | |
649 | { | |
650 | static const uint8_t buf[1024]; | |
651 | int block_len; | |
652 | ||
653 | while (size > 0) { | |
654 | block_len = MIN(sizeof(buf), size); | |
655 | size -= block_len; | |
656 | qemu_put_buffer(f, buf, block_len); | |
657 | } | |
658 | } | |
659 | ||
660 | const VMStateInfo vmstate_info_unused_buffer = { | |
661 | .name = "unused_buffer", | |
662 | .get = get_unused_buffer, | |
663 | .put = put_unused_buffer, | |
664 | }; | |
665 | ||
666 | /* bitmaps (as defined by bitmap.h). Note that size here is the size | |
667 | * of the bitmap in bits. The on-the-wire format of a bitmap is 64 | |
668 | * bit words with the bits in big endian order. The in-memory format | |
669 | * is an array of 'unsigned long', which may be either 32 or 64 bits. | |
670 | */ | |
671 | /* This is the number of 64 bit words sent over the wire */ | |
672 | #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64) | |
673 | static int get_bitmap(QEMUFile *f, void *pv, size_t size) | |
674 | { | |
675 | unsigned long *bmp = pv; | |
676 | int i, idx = 0; | |
677 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
678 | uint64_t w = qemu_get_be64(f); | |
679 | bmp[idx++] = w; | |
680 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
681 | bmp[idx++] = w >> 32; | |
682 | } | |
683 | } | |
684 | return 0; | |
685 | } | |
686 | ||
687 | static void put_bitmap(QEMUFile *f, void *pv, size_t size) | |
688 | { | |
689 | unsigned long *bmp = pv; | |
690 | int i, idx = 0; | |
691 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
692 | uint64_t w = bmp[idx++]; | |
693 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
694 | w |= ((uint64_t)bmp[idx++]) << 32; | |
695 | } | |
696 | qemu_put_be64(f, w); | |
697 | } | |
698 | } | |
699 | ||
700 | const VMStateInfo vmstate_info_bitmap = { | |
701 | .name = "bitmap", | |
702 | .get = get_bitmap, | |
703 | .put = put_bitmap, | |
704 | }; |