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Commit | Line | Data |
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1393a485 | 1 | #include "qemu/osdep.h" |
b6fcfa59 EH |
2 | #include "qemu-common.h" |
3 | #include "migration/migration.h" | |
4 | #include "migration/qemu-file.h" | |
5 | #include "migration/vmstate.h" | |
6 | #include "qemu/bitops.h" | |
6a64b644 | 7 | #include "qemu/error-report.h" |
94869d5c | 8 | #include "qemu/queue.h" |
9013dca5 | 9 | #include "trace.h" |
2c21ee76 | 10 | #include "migration/qjson.h" |
b6fcfa59 EH |
11 | |
12 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, | |
8118f095 | 13 | void *opaque, QJSON *vmdesc); |
b6fcfa59 EH |
14 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, |
15 | void *opaque); | |
16 | ||
35fc1f71 MT |
17 | static int vmstate_n_elems(void *opaque, VMStateField *field) |
18 | { | |
19 | int n_elems = 1; | |
20 | ||
21 | if (field->flags & VMS_ARRAY) { | |
22 | n_elems = field->num; | |
23 | } else if (field->flags & VMS_VARRAY_INT32) { | |
24 | n_elems = *(int32_t *)(opaque+field->num_offset); | |
25 | } else if (field->flags & VMS_VARRAY_UINT32) { | |
26 | n_elems = *(uint32_t *)(opaque+field->num_offset); | |
27 | } else if (field->flags & VMS_VARRAY_UINT16) { | |
28 | n_elems = *(uint16_t *)(opaque+field->num_offset); | |
29 | } else if (field->flags & VMS_VARRAY_UINT8) { | |
30 | n_elems = *(uint8_t *)(opaque+field->num_offset); | |
31 | } | |
32 | ||
b47d3af7 JQ |
33 | if (field->flags & VMS_MULTIPLY_ELEMENTS) { |
34 | n_elems *= field->num; | |
35 | } | |
36 | ||
023ad1a6 | 37 | trace_vmstate_n_elems(field->name, n_elems); |
35fc1f71 MT |
38 | return n_elems; |
39 | } | |
40 | ||
41 | static int vmstate_size(void *opaque, VMStateField *field) | |
42 | { | |
43 | int size = field->size; | |
44 | ||
45 | if (field->flags & VMS_VBUFFER) { | |
46 | size = *(int32_t *)(opaque+field->size_offset); | |
47 | if (field->flags & VMS_MULTIPLY) { | |
48 | size *= field->size; | |
49 | } | |
50 | } | |
51 | ||
52 | return size; | |
53 | } | |
54 | ||
f32935ea | 55 | static void *vmstate_base_addr(void *opaque, VMStateField *field, bool alloc) |
35fc1f71 MT |
56 | { |
57 | void *base_addr = opaque + field->offset; | |
58 | ||
59 | if (field->flags & VMS_POINTER) { | |
f32935ea | 60 | if (alloc && (field->flags & VMS_ALLOC)) { |
94ed706d AK |
61 | gsize size = 0; |
62 | if (field->flags & VMS_VBUFFER) { | |
63 | size = vmstate_size(opaque, field); | |
64 | } else { | |
65 | int n_elems = vmstate_n_elems(opaque, field); | |
66 | if (n_elems) { | |
67 | size = n_elems * field->size; | |
68 | } | |
69 | } | |
70 | if (size) { | |
59046ec2 | 71 | *(void **)base_addr = g_malloc(size); |
f32935ea AK |
72 | } |
73 | } | |
59046ec2 | 74 | base_addr = *(void **)base_addr; |
35fc1f71 MT |
75 | } |
76 | ||
77 | return base_addr; | |
78 | } | |
79 | ||
b6fcfa59 EH |
80 | int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
81 | void *opaque, int version_id) | |
82 | { | |
83 | VMStateField *field = vmsd->fields; | |
a5df2a02 | 84 | int ret = 0; |
b6fcfa59 | 85 | |
a5df2a02 | 86 | trace_vmstate_load_state(vmsd->name, version_id); |
b6fcfa59 | 87 | if (version_id > vmsd->version_id) { |
cde7ee59 JD |
88 | error_report("%s: incoming version_id %d is too new " |
89 | "for local version_id %d", | |
90 | vmsd->name, version_id, vmsd->version_id); | |
a5df2a02 | 91 | trace_vmstate_load_state_end(vmsd->name, "too new", -EINVAL); |
b6fcfa59 EH |
92 | return -EINVAL; |
93 | } | |
b6fcfa59 | 94 | if (version_id < vmsd->minimum_version_id) { |
767adce2 PM |
95 | if (vmsd->load_state_old && |
96 | version_id >= vmsd->minimum_version_id_old) { | |
a5df2a02 DDAG |
97 | ret = vmsd->load_state_old(f, opaque, version_id); |
98 | trace_vmstate_load_state_end(vmsd->name, "old path", ret); | |
99 | return ret; | |
767adce2 | 100 | } |
cde7ee59 JD |
101 | error_report("%s: incoming version_id %d is too old " |
102 | "for local minimum version_id %d", | |
103 | vmsd->name, version_id, vmsd->minimum_version_id); | |
a5df2a02 | 104 | trace_vmstate_load_state_end(vmsd->name, "too old", -EINVAL); |
767adce2 | 105 | return -EINVAL; |
b6fcfa59 EH |
106 | } |
107 | if (vmsd->pre_load) { | |
108 | int ret = vmsd->pre_load(opaque); | |
109 | if (ret) { | |
110 | return ret; | |
111 | } | |
112 | } | |
113 | while (field->name) { | |
a5df2a02 | 114 | trace_vmstate_load_state_field(vmsd->name, field->name); |
b6fcfa59 EH |
115 | if ((field->field_exists && |
116 | field->field_exists(opaque, version_id)) || | |
117 | (!field->field_exists && | |
118 | field->version_id <= version_id)) { | |
e84641f7 | 119 | void *first_elem = vmstate_base_addr(opaque, field, true); |
35fc1f71 MT |
120 | int i, n_elems = vmstate_n_elems(opaque, field); |
121 | int size = vmstate_size(opaque, field); | |
122 | ||
b6fcfa59 | 123 | for (i = 0; i < n_elems; i++) { |
e84641f7 | 124 | void *curr_elem = first_elem + size * i; |
b6fcfa59 EH |
125 | |
126 | if (field->flags & VMS_ARRAY_OF_POINTER) { | |
e84641f7 | 127 | curr_elem = *(void **)curr_elem; |
b6fcfa59 EH |
128 | } |
129 | if (field->flags & VMS_STRUCT) { | |
e84641f7 | 130 | ret = vmstate_load_state(f, field->vmsd, curr_elem, |
b6fcfa59 EH |
131 | field->vmsd->version_id); |
132 | } else { | |
e84641f7 | 133 | ret = field->info->get(f, curr_elem, size, field); |
b6fcfa59 | 134 | } |
13cde508 JQ |
135 | if (ret >= 0) { |
136 | ret = qemu_file_get_error(f); | |
137 | } | |
b6fcfa59 | 138 | if (ret < 0) { |
13cde508 | 139 | qemu_file_set_error(f, ret); |
a1771070 DDAG |
140 | error_report("Failed to load %s:%s", vmsd->name, |
141 | field->name); | |
9013dca5 | 142 | trace_vmstate_load_field_error(field->name, ret); |
b6fcfa59 EH |
143 | return ret; |
144 | } | |
145 | } | |
5bf81c8d | 146 | } else if (field->flags & VMS_MUST_EXIST) { |
6a64b644 DDAG |
147 | error_report("Input validation failed: %s/%s", |
148 | vmsd->name, field->name); | |
5bf81c8d | 149 | return -1; |
b6fcfa59 EH |
150 | } |
151 | field++; | |
152 | } | |
153 | ret = vmstate_subsection_load(f, vmsd, opaque); | |
154 | if (ret != 0) { | |
155 | return ret; | |
156 | } | |
157 | if (vmsd->post_load) { | |
a5df2a02 | 158 | ret = vmsd->post_load(opaque, version_id); |
b6fcfa59 | 159 | } |
a5df2a02 DDAG |
160 | trace_vmstate_load_state_end(vmsd->name, "end", ret); |
161 | return ret; | |
b6fcfa59 EH |
162 | } |
163 | ||
8118f095 AG |
164 | static int vmfield_name_num(VMStateField *start, VMStateField *search) |
165 | { | |
166 | VMStateField *field; | |
167 | int found = 0; | |
168 | ||
169 | for (field = start; field->name; field++) { | |
170 | if (!strcmp(field->name, search->name)) { | |
171 | if (field == search) { | |
172 | return found; | |
173 | } | |
174 | found++; | |
175 | } | |
176 | } | |
177 | ||
178 | return -1; | |
179 | } | |
180 | ||
181 | static bool vmfield_name_is_unique(VMStateField *start, VMStateField *search) | |
182 | { | |
183 | VMStateField *field; | |
184 | int found = 0; | |
185 | ||
186 | for (field = start; field->name; field++) { | |
187 | if (!strcmp(field->name, search->name)) { | |
188 | found++; | |
189 | /* name found more than once, so it's not unique */ | |
190 | if (found > 1) { | |
191 | return false; | |
192 | } | |
193 | } | |
194 | } | |
195 | ||
196 | return true; | |
197 | } | |
198 | ||
199 | static const char *vmfield_get_type_name(VMStateField *field) | |
200 | { | |
201 | const char *type = "unknown"; | |
202 | ||
203 | if (field->flags & VMS_STRUCT) { | |
204 | type = "struct"; | |
205 | } else if (field->info->name) { | |
206 | type = field->info->name; | |
207 | } | |
208 | ||
209 | return type; | |
210 | } | |
211 | ||
212 | static bool vmsd_can_compress(VMStateField *field) | |
213 | { | |
214 | if (field->field_exists) { | |
215 | /* Dynamically existing fields mess up compression */ | |
216 | return false; | |
217 | } | |
218 | ||
219 | if (field->flags & VMS_STRUCT) { | |
220 | VMStateField *sfield = field->vmsd->fields; | |
221 | while (sfield->name) { | |
222 | if (!vmsd_can_compress(sfield)) { | |
223 | /* Child elements can't compress, so can't we */ | |
224 | return false; | |
225 | } | |
226 | sfield++; | |
227 | } | |
228 | ||
229 | if (field->vmsd->subsections) { | |
230 | /* Subsections may come and go, better don't compress */ | |
231 | return false; | |
232 | } | |
233 | } | |
234 | ||
235 | return true; | |
236 | } | |
237 | ||
238 | static void vmsd_desc_field_start(const VMStateDescription *vmsd, QJSON *vmdesc, | |
239 | VMStateField *field, int i, int max) | |
240 | { | |
241 | char *name, *old_name; | |
242 | bool is_array = max > 1; | |
243 | bool can_compress = vmsd_can_compress(field); | |
244 | ||
245 | if (!vmdesc) { | |
246 | return; | |
247 | } | |
248 | ||
249 | name = g_strdup(field->name); | |
250 | ||
251 | /* Field name is not unique, need to make it unique */ | |
252 | if (!vmfield_name_is_unique(vmsd->fields, field)) { | |
253 | int num = vmfield_name_num(vmsd->fields, field); | |
254 | old_name = name; | |
255 | name = g_strdup_printf("%s[%d]", name, num); | |
256 | g_free(old_name); | |
257 | } | |
258 | ||
259 | json_start_object(vmdesc, NULL); | |
260 | json_prop_str(vmdesc, "name", name); | |
261 | if (is_array) { | |
262 | if (can_compress) { | |
263 | json_prop_int(vmdesc, "array_len", max); | |
264 | } else { | |
265 | json_prop_int(vmdesc, "index", i); | |
266 | } | |
267 | } | |
268 | json_prop_str(vmdesc, "type", vmfield_get_type_name(field)); | |
269 | ||
270 | if (field->flags & VMS_STRUCT) { | |
271 | json_start_object(vmdesc, "struct"); | |
272 | } | |
273 | ||
274 | g_free(name); | |
275 | } | |
276 | ||
277 | static void vmsd_desc_field_end(const VMStateDescription *vmsd, QJSON *vmdesc, | |
278 | VMStateField *field, size_t size, int i) | |
279 | { | |
280 | if (!vmdesc) { | |
281 | return; | |
282 | } | |
283 | ||
284 | if (field->flags & VMS_STRUCT) { | |
285 | /* We printed a struct in between, close its child object */ | |
286 | json_end_object(vmdesc); | |
287 | } | |
288 | ||
289 | json_prop_int(vmdesc, "size", size); | |
290 | json_end_object(vmdesc); | |
291 | } | |
292 | ||
df896152 JQ |
293 | |
294 | bool vmstate_save_needed(const VMStateDescription *vmsd, void *opaque) | |
295 | { | |
296 | if (vmsd->needed && !vmsd->needed(opaque)) { | |
297 | /* optional section not needed */ | |
298 | return false; | |
299 | } | |
300 | return true; | |
301 | } | |
302 | ||
303 | ||
b6fcfa59 | 304 | void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, |
8118f095 | 305 | void *opaque, QJSON *vmdesc) |
b6fcfa59 EH |
306 | { |
307 | VMStateField *field = vmsd->fields; | |
308 | ||
46a02a74 DDAG |
309 | trace_vmstate_save_state_top(vmsd->name); |
310 | ||
b6fcfa59 EH |
311 | if (vmsd->pre_save) { |
312 | vmsd->pre_save(opaque); | |
313 | } | |
8118f095 AG |
314 | |
315 | if (vmdesc) { | |
316 | json_prop_str(vmdesc, "vmsd_name", vmsd->name); | |
317 | json_prop_int(vmdesc, "version", vmsd->version_id); | |
318 | json_start_array(vmdesc, "fields"); | |
319 | } | |
320 | ||
b6fcfa59 EH |
321 | while (field->name) { |
322 | if (!field->field_exists || | |
323 | field->field_exists(opaque, vmsd->version_id)) { | |
e84641f7 | 324 | void *first_elem = vmstate_base_addr(opaque, field, false); |
35fc1f71 MT |
325 | int i, n_elems = vmstate_n_elems(opaque, field); |
326 | int size = vmstate_size(opaque, field); | |
8118f095 AG |
327 | int64_t old_offset, written_bytes; |
328 | QJSON *vmdesc_loop = vmdesc; | |
35fc1f71 | 329 | |
46a02a74 | 330 | trace_vmstate_save_state_loop(vmsd->name, field->name, n_elems); |
b6fcfa59 | 331 | for (i = 0; i < n_elems; i++) { |
e84641f7 | 332 | void *curr_elem = first_elem + size * i; |
b6fcfa59 | 333 | |
8118f095 AG |
334 | vmsd_desc_field_start(vmsd, vmdesc_loop, field, i, n_elems); |
335 | old_offset = qemu_ftell_fast(f); | |
b6fcfa59 | 336 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
e84641f7 HP |
337 | assert(curr_elem); |
338 | curr_elem = *(void **)curr_elem; | |
b6fcfa59 EH |
339 | } |
340 | if (field->flags & VMS_STRUCT) { | |
e84641f7 | 341 | vmstate_save_state(f, field->vmsd, curr_elem, vmdesc_loop); |
b6fcfa59 | 342 | } else { |
e84641f7 | 343 | field->info->put(f, curr_elem, size, field, vmdesc_loop); |
b6fcfa59 | 344 | } |
8118f095 AG |
345 | |
346 | written_bytes = qemu_ftell_fast(f) - old_offset; | |
347 | vmsd_desc_field_end(vmsd, vmdesc_loop, field, written_bytes, i); | |
348 | ||
349 | /* Compressed arrays only care about the first element */ | |
350 | if (vmdesc_loop && vmsd_can_compress(field)) { | |
351 | vmdesc_loop = NULL; | |
352 | } | |
b6fcfa59 | 353 | } |
5bf81c8d MT |
354 | } else { |
355 | if (field->flags & VMS_MUST_EXIST) { | |
6a64b644 | 356 | error_report("Output state validation failed: %s/%s", |
5bf81c8d MT |
357 | vmsd->name, field->name); |
358 | assert(!(field->flags & VMS_MUST_EXIST)); | |
359 | } | |
b6fcfa59 EH |
360 | } |
361 | field++; | |
362 | } | |
8118f095 AG |
363 | |
364 | if (vmdesc) { | |
365 | json_end_array(vmdesc); | |
366 | } | |
367 | ||
368 | vmstate_subsection_save(f, vmsd, opaque, vmdesc); | |
b6fcfa59 EH |
369 | } |
370 | ||
371 | static const VMStateDescription * | |
5cd8cada | 372 | vmstate_get_subsection(const VMStateDescription **sub, char *idstr) |
b6fcfa59 | 373 | { |
5cd8cada JQ |
374 | while (sub && *sub && (*sub)->needed) { |
375 | if (strcmp(idstr, (*sub)->name) == 0) { | |
376 | return *sub; | |
b6fcfa59 EH |
377 | } |
378 | sub++; | |
379 | } | |
380 | return NULL; | |
381 | } | |
382 | ||
383 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, | |
384 | void *opaque) | |
385 | { | |
a5df2a02 DDAG |
386 | trace_vmstate_subsection_load(vmsd->name); |
387 | ||
b6fcfa59 | 388 | while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) { |
7c1e52ba | 389 | char idstr[256], *idstr_ret; |
b6fcfa59 EH |
390 | int ret; |
391 | uint8_t version_id, len, size; | |
392 | const VMStateDescription *sub_vmsd; | |
393 | ||
394 | len = qemu_peek_byte(f, 1); | |
395 | if (len < strlen(vmsd->name) + 1) { | |
396 | /* subsection name has be be "section_name/a" */ | |
023ad1a6 | 397 | trace_vmstate_subsection_load_bad(vmsd->name, "(short)", ""); |
b6fcfa59 EH |
398 | return 0; |
399 | } | |
7c1e52ba | 400 | size = qemu_peek_buffer(f, (uint8_t **)&idstr_ret, len, 2); |
b6fcfa59 | 401 | if (size != len) { |
023ad1a6 | 402 | trace_vmstate_subsection_load_bad(vmsd->name, "(peek fail)", ""); |
b6fcfa59 EH |
403 | return 0; |
404 | } | |
7c1e52ba | 405 | memcpy(idstr, idstr_ret, size); |
b6fcfa59 EH |
406 | idstr[size] = 0; |
407 | ||
408 | if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) { | |
023ad1a6 DDAG |
409 | trace_vmstate_subsection_load_bad(vmsd->name, idstr, "(prefix)"); |
410 | /* it doesn't have a valid subsection name */ | |
b6fcfa59 EH |
411 | return 0; |
412 | } | |
413 | sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr); | |
414 | if (sub_vmsd == NULL) { | |
023ad1a6 | 415 | trace_vmstate_subsection_load_bad(vmsd->name, idstr, "(lookup)"); |
b6fcfa59 EH |
416 | return -ENOENT; |
417 | } | |
418 | qemu_file_skip(f, 1); /* subsection */ | |
419 | qemu_file_skip(f, 1); /* len */ | |
420 | qemu_file_skip(f, len); /* idstr */ | |
421 | version_id = qemu_get_be32(f); | |
422 | ||
423 | ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); | |
424 | if (ret) { | |
023ad1a6 | 425 | trace_vmstate_subsection_load_bad(vmsd->name, idstr, "(child)"); |
b6fcfa59 EH |
426 | return ret; |
427 | } | |
428 | } | |
a5df2a02 DDAG |
429 | |
430 | trace_vmstate_subsection_load_good(vmsd->name); | |
b6fcfa59 EH |
431 | return 0; |
432 | } | |
433 | ||
434 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, | |
8118f095 | 435 | void *opaque, QJSON *vmdesc) |
b6fcfa59 | 436 | { |
5cd8cada | 437 | const VMStateDescription **sub = vmsd->subsections; |
8118f095 | 438 | bool subsection_found = false; |
b6fcfa59 | 439 | |
46a02a74 | 440 | trace_vmstate_subsection_save_top(vmsd->name); |
5cd8cada JQ |
441 | while (sub && *sub && (*sub)->needed) { |
442 | if ((*sub)->needed(opaque)) { | |
46a02a74 | 443 | const VMStateDescription *vmsdsub = *sub; |
b6fcfa59 EH |
444 | uint8_t len; |
445 | ||
46a02a74 | 446 | trace_vmstate_subsection_save_loop(vmsd->name, vmsdsub->name); |
8118f095 AG |
447 | if (vmdesc) { |
448 | /* Only create subsection array when we have any */ | |
449 | if (!subsection_found) { | |
450 | json_start_array(vmdesc, "subsections"); | |
451 | subsection_found = true; | |
452 | } | |
453 | ||
454 | json_start_object(vmdesc, NULL); | |
455 | } | |
456 | ||
b6fcfa59 | 457 | qemu_put_byte(f, QEMU_VM_SUBSECTION); |
46a02a74 | 458 | len = strlen(vmsdsub->name); |
b6fcfa59 | 459 | qemu_put_byte(f, len); |
46a02a74 DDAG |
460 | qemu_put_buffer(f, (uint8_t *)vmsdsub->name, len); |
461 | qemu_put_be32(f, vmsdsub->version_id); | |
462 | vmstate_save_state(f, vmsdsub, opaque, vmdesc); | |
8118f095 AG |
463 | |
464 | if (vmdesc) { | |
465 | json_end_object(vmdesc); | |
466 | } | |
b6fcfa59 EH |
467 | } |
468 | sub++; | |
469 | } | |
8118f095 AG |
470 | |
471 | if (vmdesc && subsection_found) { | |
472 | json_end_array(vmdesc); | |
473 | } | |
b6fcfa59 EH |
474 | } |
475 | ||
476 | /* bool */ | |
477 | ||
2c21ee76 | 478 | static int get_bool(QEMUFile *f, void *pv, size_t size, VMStateField *field) |
b6fcfa59 EH |
479 | { |
480 | bool *v = pv; | |
481 | *v = qemu_get_byte(f); | |
482 | return 0; | |
483 | } | |
484 | ||
2c21ee76 JD |
485 | static int put_bool(QEMUFile *f, void *pv, size_t size, VMStateField *field, |
486 | QJSON *vmdesc) | |
b6fcfa59 EH |
487 | { |
488 | bool *v = pv; | |
489 | qemu_put_byte(f, *v); | |
2c21ee76 | 490 | return 0; |
b6fcfa59 EH |
491 | } |
492 | ||
493 | const VMStateInfo vmstate_info_bool = { | |
494 | .name = "bool", | |
495 | .get = get_bool, | |
496 | .put = put_bool, | |
497 | }; | |
498 | ||
499 | /* 8 bit int */ | |
500 | ||
2c21ee76 | 501 | static int get_int8(QEMUFile *f, void *pv, size_t size, VMStateField *field) |
b6fcfa59 EH |
502 | { |
503 | int8_t *v = pv; | |
504 | qemu_get_s8s(f, v); | |
505 | return 0; | |
506 | } | |
507 | ||
2c21ee76 JD |
508 | static int put_int8(QEMUFile *f, void *pv, size_t size, VMStateField *field, |
509 | QJSON *vmdesc) | |
b6fcfa59 EH |
510 | { |
511 | int8_t *v = pv; | |
512 | qemu_put_s8s(f, v); | |
2c21ee76 | 513 | return 0; |
b6fcfa59 EH |
514 | } |
515 | ||
516 | const VMStateInfo vmstate_info_int8 = { | |
517 | .name = "int8", | |
518 | .get = get_int8, | |
519 | .put = put_int8, | |
520 | }; | |
521 | ||
522 | /* 16 bit int */ | |
523 | ||
2c21ee76 | 524 | static int get_int16(QEMUFile *f, void *pv, size_t size, VMStateField *field) |
b6fcfa59 EH |
525 | { |
526 | int16_t *v = pv; | |
527 | qemu_get_sbe16s(f, v); | |
528 | return 0; | |
529 | } | |
530 | ||
2c21ee76 JD |
531 | static int put_int16(QEMUFile *f, void *pv, size_t size, VMStateField *field, |
532 | QJSON *vmdesc) | |
b6fcfa59 EH |
533 | { |
534 | int16_t *v = pv; | |
535 | qemu_put_sbe16s(f, v); | |
2c21ee76 | 536 | return 0; |
b6fcfa59 EH |
537 | } |
538 | ||
539 | const VMStateInfo vmstate_info_int16 = { | |
540 | .name = "int16", | |
541 | .get = get_int16, | |
542 | .put = put_int16, | |
543 | }; | |
544 | ||
545 | /* 32 bit int */ | |
546 | ||
2c21ee76 | 547 | static int get_int32(QEMUFile *f, void *pv, size_t size, VMStateField *field) |
b6fcfa59 EH |
548 | { |
549 | int32_t *v = pv; | |
550 | qemu_get_sbe32s(f, v); | |
551 | return 0; | |
552 | } | |
553 | ||
2c21ee76 JD |
554 | static int put_int32(QEMUFile *f, void *pv, size_t size, VMStateField *field, |
555 | QJSON *vmdesc) | |
b6fcfa59 EH |
556 | { |
557 | int32_t *v = pv; | |
558 | qemu_put_sbe32s(f, v); | |
2c21ee76 | 559 | return 0; |
b6fcfa59 EH |
560 | } |
561 | ||
562 | const VMStateInfo vmstate_info_int32 = { | |
563 | .name = "int32", | |
564 | .get = get_int32, | |
565 | .put = put_int32, | |
566 | }; | |
567 | ||
568 | /* 32 bit int. See that the received value is the same than the one | |
569 | in the field */ | |
570 | ||
2c21ee76 JD |
571 | static int get_int32_equal(QEMUFile *f, void *pv, size_t size, |
572 | VMStateField *field) | |
b6fcfa59 EH |
573 | { |
574 | int32_t *v = pv; | |
575 | int32_t v2; | |
576 | qemu_get_sbe32s(f, &v2); | |
577 | ||
578 | if (*v == v2) { | |
579 | return 0; | |
580 | } | |
49228e17 | 581 | error_report("%" PRIx32 " != %" PRIx32, *v, v2); |
b6fcfa59 EH |
582 | return -EINVAL; |
583 | } | |
584 | ||
585 | const VMStateInfo vmstate_info_int32_equal = { | |
586 | .name = "int32 equal", | |
587 | .get = get_int32_equal, | |
588 | .put = put_int32, | |
589 | }; | |
590 | ||
d2ef4b61 MT |
591 | /* 32 bit int. Check that the received value is non-negative |
592 | * and less than or equal to the one in the field. | |
593 | */ | |
b6fcfa59 | 594 | |
2c21ee76 | 595 | static int get_int32_le(QEMUFile *f, void *pv, size_t size, VMStateField *field) |
b6fcfa59 | 596 | { |
24a370ef DDAG |
597 | int32_t *cur = pv; |
598 | int32_t loaded; | |
599 | qemu_get_sbe32s(f, &loaded); | |
b6fcfa59 | 600 | |
d2ef4b61 | 601 | if (loaded >= 0 && loaded <= *cur) { |
24a370ef | 602 | *cur = loaded; |
b6fcfa59 EH |
603 | return 0; |
604 | } | |
49228e17 DDAG |
605 | error_report("Invalid value %" PRId32 |
606 | " expecting positive value <= %" PRId32, | |
607 | loaded, *cur); | |
b6fcfa59 EH |
608 | return -EINVAL; |
609 | } | |
610 | ||
611 | const VMStateInfo vmstate_info_int32_le = { | |
24a370ef | 612 | .name = "int32 le", |
b6fcfa59 EH |
613 | .get = get_int32_le, |
614 | .put = put_int32, | |
615 | }; | |
616 | ||
617 | /* 64 bit int */ | |
618 | ||
2c21ee76 | 619 | static int get_int64(QEMUFile *f, void *pv, size_t size, VMStateField *field) |
b6fcfa59 EH |
620 | { |
621 | int64_t *v = pv; | |
622 | qemu_get_sbe64s(f, v); | |
623 | return 0; | |
624 | } | |
625 | ||
2c21ee76 JD |
626 | static int put_int64(QEMUFile *f, void *pv, size_t size, VMStateField *field, |
627 | QJSON *vmdesc) | |
b6fcfa59 EH |
628 | { |
629 | int64_t *v = pv; | |
630 | qemu_put_sbe64s(f, v); | |
2c21ee76 | 631 | return 0; |
b6fcfa59 EH |
632 | } |
633 | ||
634 | const VMStateInfo vmstate_info_int64 = { | |
635 | .name = "int64", | |
636 | .get = get_int64, | |
637 | .put = put_int64, | |
638 | }; | |
639 | ||
640 | /* 8 bit unsigned int */ | |
641 | ||
2c21ee76 | 642 | static int get_uint8(QEMUFile *f, void *pv, size_t size, VMStateField *field) |
b6fcfa59 EH |
643 | { |
644 | uint8_t *v = pv; | |
645 | qemu_get_8s(f, v); | |
646 | return 0; | |
647 | } | |
648 | ||
2c21ee76 JD |
649 | static int put_uint8(QEMUFile *f, void *pv, size_t size, VMStateField *field, |
650 | QJSON *vmdesc) | |
b6fcfa59 EH |
651 | { |
652 | uint8_t *v = pv; | |
653 | qemu_put_8s(f, v); | |
2c21ee76 | 654 | return 0; |
b6fcfa59 EH |
655 | } |
656 | ||
657 | const VMStateInfo vmstate_info_uint8 = { | |
658 | .name = "uint8", | |
659 | .get = get_uint8, | |
660 | .put = put_uint8, | |
661 | }; | |
662 | ||
663 | /* 16 bit unsigned int */ | |
664 | ||
2c21ee76 | 665 | static int get_uint16(QEMUFile *f, void *pv, size_t size, VMStateField *field) |
b6fcfa59 EH |
666 | { |
667 | uint16_t *v = pv; | |
668 | qemu_get_be16s(f, v); | |
669 | return 0; | |
670 | } | |
671 | ||
2c21ee76 JD |
672 | static int put_uint16(QEMUFile *f, void *pv, size_t size, VMStateField *field, |
673 | QJSON *vmdesc) | |
b6fcfa59 EH |
674 | { |
675 | uint16_t *v = pv; | |
676 | qemu_put_be16s(f, v); | |
2c21ee76 | 677 | return 0; |
b6fcfa59 EH |
678 | } |
679 | ||
680 | const VMStateInfo vmstate_info_uint16 = { | |
681 | .name = "uint16", | |
682 | .get = get_uint16, | |
683 | .put = put_uint16, | |
684 | }; | |
685 | ||
686 | /* 32 bit unsigned int */ | |
687 | ||
2c21ee76 | 688 | static int get_uint32(QEMUFile *f, void *pv, size_t size, VMStateField *field) |
b6fcfa59 EH |
689 | { |
690 | uint32_t *v = pv; | |
691 | qemu_get_be32s(f, v); | |
692 | return 0; | |
693 | } | |
694 | ||
2c21ee76 JD |
695 | static int put_uint32(QEMUFile *f, void *pv, size_t size, VMStateField *field, |
696 | QJSON *vmdesc) | |
b6fcfa59 EH |
697 | { |
698 | uint32_t *v = pv; | |
699 | qemu_put_be32s(f, v); | |
2c21ee76 | 700 | return 0; |
b6fcfa59 EH |
701 | } |
702 | ||
703 | const VMStateInfo vmstate_info_uint32 = { | |
704 | .name = "uint32", | |
705 | .get = get_uint32, | |
706 | .put = put_uint32, | |
707 | }; | |
708 | ||
709 | /* 32 bit uint. See that the received value is the same than the one | |
710 | in the field */ | |
711 | ||
2c21ee76 JD |
712 | static int get_uint32_equal(QEMUFile *f, void *pv, size_t size, |
713 | VMStateField *field) | |
b6fcfa59 EH |
714 | { |
715 | uint32_t *v = pv; | |
716 | uint32_t v2; | |
717 | qemu_get_be32s(f, &v2); | |
718 | ||
719 | if (*v == v2) { | |
720 | return 0; | |
721 | } | |
49228e17 | 722 | error_report("%" PRIx32 " != %" PRIx32, *v, v2); |
b6fcfa59 EH |
723 | return -EINVAL; |
724 | } | |
725 | ||
726 | const VMStateInfo vmstate_info_uint32_equal = { | |
727 | .name = "uint32 equal", | |
728 | .get = get_uint32_equal, | |
729 | .put = put_uint32, | |
730 | }; | |
731 | ||
732 | /* 64 bit unsigned int */ | |
733 | ||
2c21ee76 | 734 | static int get_uint64(QEMUFile *f, void *pv, size_t size, VMStateField *field) |
b6fcfa59 EH |
735 | { |
736 | uint64_t *v = pv; | |
737 | qemu_get_be64s(f, v); | |
738 | return 0; | |
739 | } | |
740 | ||
2c21ee76 JD |
741 | static int put_uint64(QEMUFile *f, void *pv, size_t size, VMStateField *field, |
742 | QJSON *vmdesc) | |
b6fcfa59 EH |
743 | { |
744 | uint64_t *v = pv; | |
745 | qemu_put_be64s(f, v); | |
2c21ee76 | 746 | return 0; |
b6fcfa59 EH |
747 | } |
748 | ||
749 | const VMStateInfo vmstate_info_uint64 = { | |
750 | .name = "uint64", | |
751 | .get = get_uint64, | |
752 | .put = put_uint64, | |
753 | }; | |
754 | ||
755 | /* 64 bit unsigned int. See that the received value is the same than the one | |
756 | in the field */ | |
757 | ||
2c21ee76 JD |
758 | static int get_uint64_equal(QEMUFile *f, void *pv, size_t size, |
759 | VMStateField *field) | |
b6fcfa59 EH |
760 | { |
761 | uint64_t *v = pv; | |
762 | uint64_t v2; | |
763 | qemu_get_be64s(f, &v2); | |
764 | ||
765 | if (*v == v2) { | |
766 | return 0; | |
767 | } | |
49228e17 | 768 | error_report("%" PRIx64 " != %" PRIx64, *v, v2); |
b6fcfa59 EH |
769 | return -EINVAL; |
770 | } | |
771 | ||
772 | const VMStateInfo vmstate_info_uint64_equal = { | |
773 | .name = "int64 equal", | |
774 | .get = get_uint64_equal, | |
775 | .put = put_uint64, | |
776 | }; | |
777 | ||
778 | /* 8 bit int. See that the received value is the same than the one | |
779 | in the field */ | |
780 | ||
2c21ee76 JD |
781 | static int get_uint8_equal(QEMUFile *f, void *pv, size_t size, |
782 | VMStateField *field) | |
b6fcfa59 EH |
783 | { |
784 | uint8_t *v = pv; | |
785 | uint8_t v2; | |
786 | qemu_get_8s(f, &v2); | |
787 | ||
788 | if (*v == v2) { | |
789 | return 0; | |
790 | } | |
49228e17 | 791 | error_report("%x != %x", *v, v2); |
b6fcfa59 EH |
792 | return -EINVAL; |
793 | } | |
794 | ||
795 | const VMStateInfo vmstate_info_uint8_equal = { | |
796 | .name = "uint8 equal", | |
797 | .get = get_uint8_equal, | |
798 | .put = put_uint8, | |
799 | }; | |
800 | ||
801 | /* 16 bit unsigned int int. See that the received value is the same than the one | |
802 | in the field */ | |
803 | ||
2c21ee76 JD |
804 | static int get_uint16_equal(QEMUFile *f, void *pv, size_t size, |
805 | VMStateField *field) | |
b6fcfa59 EH |
806 | { |
807 | uint16_t *v = pv; | |
808 | uint16_t v2; | |
809 | qemu_get_be16s(f, &v2); | |
810 | ||
811 | if (*v == v2) { | |
812 | return 0; | |
813 | } | |
49228e17 | 814 | error_report("%x != %x", *v, v2); |
b6fcfa59 EH |
815 | return -EINVAL; |
816 | } | |
817 | ||
818 | const VMStateInfo vmstate_info_uint16_equal = { | |
819 | .name = "uint16 equal", | |
820 | .get = get_uint16_equal, | |
821 | .put = put_uint16, | |
822 | }; | |
823 | ||
824 | /* floating point */ | |
825 | ||
2c21ee76 JD |
826 | static int get_float64(QEMUFile *f, void *pv, size_t size, |
827 | VMStateField *field) | |
b6fcfa59 EH |
828 | { |
829 | float64 *v = pv; | |
830 | ||
831 | *v = make_float64(qemu_get_be64(f)); | |
832 | return 0; | |
833 | } | |
834 | ||
2c21ee76 JD |
835 | static int put_float64(QEMUFile *f, void *pv, size_t size, VMStateField *field, |
836 | QJSON *vmdesc) | |
b6fcfa59 EH |
837 | { |
838 | uint64_t *v = pv; | |
839 | ||
840 | qemu_put_be64(f, float64_val(*v)); | |
2c21ee76 | 841 | return 0; |
b6fcfa59 EH |
842 | } |
843 | ||
844 | const VMStateInfo vmstate_info_float64 = { | |
845 | .name = "float64", | |
846 | .get = get_float64, | |
847 | .put = put_float64, | |
848 | }; | |
849 | ||
55174749 JQ |
850 | /* CPU_DoubleU type */ |
851 | ||
2c21ee76 JD |
852 | static int get_cpudouble(QEMUFile *f, void *pv, size_t size, |
853 | VMStateField *field) | |
55174749 JQ |
854 | { |
855 | CPU_DoubleU *v = pv; | |
856 | qemu_get_be32s(f, &v->l.upper); | |
857 | qemu_get_be32s(f, &v->l.lower); | |
858 | return 0; | |
859 | } | |
860 | ||
2c21ee76 JD |
861 | static int put_cpudouble(QEMUFile *f, void *pv, size_t size, |
862 | VMStateField *field, QJSON *vmdesc) | |
55174749 JQ |
863 | { |
864 | CPU_DoubleU *v = pv; | |
865 | qemu_put_be32s(f, &v->l.upper); | |
866 | qemu_put_be32s(f, &v->l.lower); | |
2c21ee76 | 867 | return 0; |
55174749 JQ |
868 | } |
869 | ||
870 | const VMStateInfo vmstate_info_cpudouble = { | |
871 | .name = "CPU_Double_U", | |
872 | .get = get_cpudouble, | |
873 | .put = put_cpudouble, | |
874 | }; | |
875 | ||
b6fcfa59 EH |
876 | /* uint8_t buffers */ |
877 | ||
2c21ee76 JD |
878 | static int get_buffer(QEMUFile *f, void *pv, size_t size, |
879 | VMStateField *field) | |
b6fcfa59 EH |
880 | { |
881 | uint8_t *v = pv; | |
882 | qemu_get_buffer(f, v, size); | |
883 | return 0; | |
884 | } | |
885 | ||
2c21ee76 JD |
886 | static int put_buffer(QEMUFile *f, void *pv, size_t size, VMStateField *field, |
887 | QJSON *vmdesc) | |
b6fcfa59 EH |
888 | { |
889 | uint8_t *v = pv; | |
890 | qemu_put_buffer(f, v, size); | |
2c21ee76 | 891 | return 0; |
b6fcfa59 EH |
892 | } |
893 | ||
894 | const VMStateInfo vmstate_info_buffer = { | |
895 | .name = "buffer", | |
896 | .get = get_buffer, | |
897 | .put = put_buffer, | |
898 | }; | |
899 | ||
900 | /* unused buffers: space that was used for some fields that are | |
901 | not useful anymore */ | |
902 | ||
2c21ee76 JD |
903 | static int get_unused_buffer(QEMUFile *f, void *pv, size_t size, |
904 | VMStateField *field) | |
b6fcfa59 EH |
905 | { |
906 | uint8_t buf[1024]; | |
907 | int block_len; | |
908 | ||
909 | while (size > 0) { | |
910 | block_len = MIN(sizeof(buf), size); | |
911 | size -= block_len; | |
912 | qemu_get_buffer(f, buf, block_len); | |
913 | } | |
914 | return 0; | |
915 | } | |
916 | ||
2c21ee76 JD |
917 | static int put_unused_buffer(QEMUFile *f, void *pv, size_t size, |
918 | VMStateField *field, QJSON *vmdesc) | |
b6fcfa59 EH |
919 | { |
920 | static const uint8_t buf[1024]; | |
921 | int block_len; | |
922 | ||
923 | while (size > 0) { | |
924 | block_len = MIN(sizeof(buf), size); | |
925 | size -= block_len; | |
926 | qemu_put_buffer(f, buf, block_len); | |
927 | } | |
2c21ee76 JD |
928 | |
929 | return 0; | |
b6fcfa59 EH |
930 | } |
931 | ||
932 | const VMStateInfo vmstate_info_unused_buffer = { | |
933 | .name = "unused_buffer", | |
934 | .get = get_unused_buffer, | |
935 | .put = put_unused_buffer, | |
936 | }; | |
937 | ||
bcf45131 DDAG |
938 | /* vmstate_info_tmp, see VMSTATE_WITH_TMP, the idea is that we allocate |
939 | * a temporary buffer and the pre_load/pre_save methods in the child vmsd | |
940 | * copy stuff from the parent into the child and do calculations to fill | |
941 | * in fields that don't really exist in the parent but need to be in the | |
942 | * stream. | |
943 | */ | |
944 | static int get_tmp(QEMUFile *f, void *pv, size_t size, VMStateField *field) | |
945 | { | |
946 | int ret; | |
947 | const VMStateDescription *vmsd = field->vmsd; | |
948 | int version_id = field->version_id; | |
949 | void *tmp = g_malloc(size); | |
950 | ||
951 | /* Writes the parent field which is at the start of the tmp */ | |
952 | *(void **)tmp = pv; | |
953 | ret = vmstate_load_state(f, vmsd, tmp, version_id); | |
954 | g_free(tmp); | |
955 | return ret; | |
956 | } | |
957 | ||
958 | static int put_tmp(QEMUFile *f, void *pv, size_t size, VMStateField *field, | |
959 | QJSON *vmdesc) | |
960 | { | |
961 | const VMStateDescription *vmsd = field->vmsd; | |
962 | void *tmp = g_malloc(size); | |
963 | ||
964 | /* Writes the parent field which is at the start of the tmp */ | |
965 | *(void **)tmp = pv; | |
966 | vmstate_save_state(f, vmsd, tmp, vmdesc); | |
967 | g_free(tmp); | |
968 | ||
969 | return 0; | |
970 | } | |
971 | ||
972 | const VMStateInfo vmstate_info_tmp = { | |
973 | .name = "tmp", | |
974 | .get = get_tmp, | |
975 | .put = put_tmp, | |
976 | }; | |
977 | ||
b6fcfa59 EH |
978 | /* bitmaps (as defined by bitmap.h). Note that size here is the size |
979 | * of the bitmap in bits. The on-the-wire format of a bitmap is 64 | |
980 | * bit words with the bits in big endian order. The in-memory format | |
981 | * is an array of 'unsigned long', which may be either 32 or 64 bits. | |
982 | */ | |
983 | /* This is the number of 64 bit words sent over the wire */ | |
984 | #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64) | |
2c21ee76 | 985 | static int get_bitmap(QEMUFile *f, void *pv, size_t size, VMStateField *field) |
b6fcfa59 EH |
986 | { |
987 | unsigned long *bmp = pv; | |
988 | int i, idx = 0; | |
989 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
990 | uint64_t w = qemu_get_be64(f); | |
991 | bmp[idx++] = w; | |
992 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
993 | bmp[idx++] = w >> 32; | |
994 | } | |
995 | } | |
996 | return 0; | |
997 | } | |
998 | ||
2c21ee76 JD |
999 | static int put_bitmap(QEMUFile *f, void *pv, size_t size, VMStateField *field, |
1000 | QJSON *vmdesc) | |
b6fcfa59 EH |
1001 | { |
1002 | unsigned long *bmp = pv; | |
1003 | int i, idx = 0; | |
1004 | for (i = 0; i < BITS_TO_U64S(size); i++) { | |
1005 | uint64_t w = bmp[idx++]; | |
1006 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { | |
1007 | w |= ((uint64_t)bmp[idx++]) << 32; | |
1008 | } | |
1009 | qemu_put_be64(f, w); | |
1010 | } | |
2c21ee76 JD |
1011 | |
1012 | return 0; | |
b6fcfa59 EH |
1013 | } |
1014 | ||
1015 | const VMStateInfo vmstate_info_bitmap = { | |
1016 | .name = "bitmap", | |
1017 | .get = get_bitmap, | |
1018 | .put = put_bitmap, | |
1019 | }; | |
94869d5c JD |
1020 | |
1021 | /* get for QTAILQ | |
1022 | * meta data about the QTAILQ is encoded in a VMStateField structure | |
1023 | */ | |
1024 | static int get_qtailq(QEMUFile *f, void *pv, size_t unused_size, | |
1025 | VMStateField *field) | |
1026 | { | |
1027 | int ret = 0; | |
1028 | const VMStateDescription *vmsd = field->vmsd; | |
1029 | /* size of a QTAILQ element */ | |
1030 | size_t size = field->size; | |
1031 | /* offset of the QTAILQ entry in a QTAILQ element */ | |
1032 | size_t entry_offset = field->start; | |
1033 | int version_id = field->version_id; | |
1034 | void *elm; | |
1035 | ||
1036 | trace_get_qtailq(vmsd->name, version_id); | |
1037 | if (version_id > vmsd->version_id) { | |
1038 | error_report("%s %s", vmsd->name, "too new"); | |
1039 | trace_get_qtailq_end(vmsd->name, "too new", -EINVAL); | |
1040 | ||
1041 | return -EINVAL; | |
1042 | } | |
1043 | if (version_id < vmsd->minimum_version_id) { | |
1044 | error_report("%s %s", vmsd->name, "too old"); | |
1045 | trace_get_qtailq_end(vmsd->name, "too old", -EINVAL); | |
1046 | return -EINVAL; | |
1047 | } | |
1048 | ||
1049 | while (qemu_get_byte(f)) { | |
1050 | elm = g_malloc(size); | |
1051 | ret = vmstate_load_state(f, vmsd, elm, version_id); | |
1052 | if (ret) { | |
1053 | return ret; | |
1054 | } | |
1055 | QTAILQ_RAW_INSERT_TAIL(pv, elm, entry_offset); | |
1056 | } | |
1057 | ||
1058 | trace_get_qtailq_end(vmsd->name, "end", ret); | |
1059 | return ret; | |
1060 | } | |
1061 | ||
1062 | /* put for QTAILQ */ | |
1063 | static int put_qtailq(QEMUFile *f, void *pv, size_t unused_size, | |
1064 | VMStateField *field, QJSON *vmdesc) | |
1065 | { | |
1066 | const VMStateDescription *vmsd = field->vmsd; | |
1067 | /* offset of the QTAILQ entry in a QTAILQ element*/ | |
1068 | size_t entry_offset = field->start; | |
1069 | void *elm; | |
1070 | ||
1071 | trace_put_qtailq(vmsd->name, vmsd->version_id); | |
1072 | ||
1073 | QTAILQ_RAW_FOREACH(elm, pv, entry_offset) { | |
1074 | qemu_put_byte(f, true); | |
1075 | vmstate_save_state(f, vmsd, elm, vmdesc); | |
1076 | } | |
1077 | qemu_put_byte(f, false); | |
1078 | ||
1079 | trace_put_qtailq_end(vmsd->name, "end"); | |
1080 | ||
1081 | return 0; | |
1082 | } | |
1083 | const VMStateInfo vmstate_info_qtailq = { | |
1084 | .name = "qtailq", | |
1085 | .get = get_qtailq, | |
1086 | .put = put_qtailq, | |
1087 | }; |