Eduardo Habkost | b6fcfa5 | 2013-11-28 12:01:15 -0200 | [diff] [blame] | 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" |
Alexey Kardashevskiy | 9013dca | 2014-03-11 10:42:29 +1100 | [diff] [blame] | 6 | #include "trace.h" |
Eduardo Habkost | b6fcfa5 | 2013-11-28 12:01:15 -0200 | [diff] [blame] | 7 | |
| 8 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
| 9 | void *opaque); |
| 10 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, |
| 11 | void *opaque); |
| 12 | |
| 13 | int vmstate_load_state(QEMUFile *f, const VMStateDescription *vmsd, |
| 14 | void *opaque, int version_id) |
| 15 | { |
| 16 | VMStateField *field = vmsd->fields; |
| 17 | int ret; |
| 18 | |
| 19 | if (version_id > vmsd->version_id) { |
| 20 | return -EINVAL; |
| 21 | } |
| 22 | if (version_id < vmsd->minimum_version_id_old) { |
| 23 | return -EINVAL; |
| 24 | } |
| 25 | if (version_id < vmsd->minimum_version_id) { |
| 26 | return vmsd->load_state_old(f, opaque, version_id); |
| 27 | } |
| 28 | if (vmsd->pre_load) { |
| 29 | int ret = vmsd->pre_load(opaque); |
| 30 | if (ret) { |
| 31 | return ret; |
| 32 | } |
| 33 | } |
| 34 | while (field->name) { |
| 35 | if ((field->field_exists && |
| 36 | field->field_exists(opaque, version_id)) || |
| 37 | (!field->field_exists && |
| 38 | field->version_id <= version_id)) { |
| 39 | void *base_addr = opaque + field->offset; |
| 40 | int i, n_elems = 1; |
| 41 | int size = field->size; |
| 42 | |
| 43 | if (field->flags & VMS_VBUFFER) { |
| 44 | size = *(int32_t *)(opaque+field->size_offset); |
| 45 | if (field->flags & VMS_MULTIPLY) { |
| 46 | size *= field->size; |
| 47 | } |
| 48 | } |
| 49 | if (field->flags & VMS_ARRAY) { |
| 50 | n_elems = field->num; |
| 51 | } else if (field->flags & VMS_VARRAY_INT32) { |
| 52 | n_elems = *(int32_t *)(opaque+field->num_offset); |
| 53 | } else if (field->flags & VMS_VARRAY_UINT32) { |
| 54 | n_elems = *(uint32_t *)(opaque+field->num_offset); |
| 55 | } else if (field->flags & VMS_VARRAY_UINT16) { |
| 56 | n_elems = *(uint16_t *)(opaque+field->num_offset); |
| 57 | } else if (field->flags & VMS_VARRAY_UINT8) { |
| 58 | n_elems = *(uint8_t *)(opaque+field->num_offset); |
| 59 | } |
| 60 | if (field->flags & VMS_POINTER) { |
| 61 | base_addr = *(void **)base_addr + field->start; |
| 62 | } |
| 63 | for (i = 0; i < n_elems; i++) { |
| 64 | void *addr = base_addr + size * i; |
| 65 | |
| 66 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
| 67 | addr = *(void **)addr; |
| 68 | } |
| 69 | if (field->flags & VMS_STRUCT) { |
| 70 | ret = vmstate_load_state(f, field->vmsd, addr, |
| 71 | field->vmsd->version_id); |
| 72 | } else { |
| 73 | ret = field->info->get(f, addr, size); |
| 74 | |
| 75 | } |
| 76 | if (ret < 0) { |
Alexey Kardashevskiy | 9013dca | 2014-03-11 10:42:29 +1100 | [diff] [blame] | 77 | trace_vmstate_load_field_error(field->name, ret); |
Eduardo Habkost | b6fcfa5 | 2013-11-28 12:01:15 -0200 | [diff] [blame] | 78 | return ret; |
| 79 | } |
| 80 | } |
| 81 | } |
| 82 | field++; |
| 83 | } |
| 84 | ret = vmstate_subsection_load(f, vmsd, opaque); |
| 85 | if (ret != 0) { |
| 86 | return ret; |
| 87 | } |
| 88 | if (vmsd->post_load) { |
| 89 | return vmsd->post_load(opaque, version_id); |
| 90 | } |
| 91 | return 0; |
| 92 | } |
| 93 | |
| 94 | void vmstate_save_state(QEMUFile *f, const VMStateDescription *vmsd, |
| 95 | void *opaque) |
| 96 | { |
| 97 | VMStateField *field = vmsd->fields; |
| 98 | |
| 99 | if (vmsd->pre_save) { |
| 100 | vmsd->pre_save(opaque); |
| 101 | } |
| 102 | while (field->name) { |
| 103 | if (!field->field_exists || |
| 104 | field->field_exists(opaque, vmsd->version_id)) { |
| 105 | void *base_addr = opaque + field->offset; |
| 106 | int i, n_elems = 1; |
| 107 | int size = field->size; |
| 108 | |
| 109 | if (field->flags & VMS_VBUFFER) { |
| 110 | size = *(int32_t *)(opaque+field->size_offset); |
| 111 | if (field->flags & VMS_MULTIPLY) { |
| 112 | size *= field->size; |
| 113 | } |
| 114 | } |
| 115 | if (field->flags & VMS_ARRAY) { |
| 116 | n_elems = field->num; |
| 117 | } else if (field->flags & VMS_VARRAY_INT32) { |
| 118 | n_elems = *(int32_t *)(opaque+field->num_offset); |
| 119 | } else if (field->flags & VMS_VARRAY_UINT32) { |
| 120 | n_elems = *(uint32_t *)(opaque+field->num_offset); |
| 121 | } else if (field->flags & VMS_VARRAY_UINT16) { |
| 122 | n_elems = *(uint16_t *)(opaque+field->num_offset); |
| 123 | } else if (field->flags & VMS_VARRAY_UINT8) { |
| 124 | n_elems = *(uint8_t *)(opaque+field->num_offset); |
| 125 | } |
| 126 | if (field->flags & VMS_POINTER) { |
| 127 | base_addr = *(void **)base_addr + field->start; |
| 128 | } |
| 129 | for (i = 0; i < n_elems; i++) { |
| 130 | void *addr = base_addr + size * i; |
| 131 | |
| 132 | if (field->flags & VMS_ARRAY_OF_POINTER) { |
| 133 | addr = *(void **)addr; |
| 134 | } |
| 135 | if (field->flags & VMS_STRUCT) { |
| 136 | vmstate_save_state(f, field->vmsd, addr); |
| 137 | } else { |
| 138 | field->info->put(f, addr, size); |
| 139 | } |
| 140 | } |
| 141 | } |
| 142 | field++; |
| 143 | } |
| 144 | vmstate_subsection_save(f, vmsd, opaque); |
| 145 | } |
| 146 | |
| 147 | static const VMStateDescription * |
| 148 | vmstate_get_subsection(const VMStateSubsection *sub, char *idstr) |
| 149 | { |
| 150 | while (sub && sub->needed) { |
| 151 | if (strcmp(idstr, sub->vmsd->name) == 0) { |
| 152 | return sub->vmsd; |
| 153 | } |
| 154 | sub++; |
| 155 | } |
| 156 | return NULL; |
| 157 | } |
| 158 | |
| 159 | static int vmstate_subsection_load(QEMUFile *f, const VMStateDescription *vmsd, |
| 160 | void *opaque) |
| 161 | { |
| 162 | while (qemu_peek_byte(f, 0) == QEMU_VM_SUBSECTION) { |
| 163 | char idstr[256]; |
| 164 | int ret; |
| 165 | uint8_t version_id, len, size; |
| 166 | const VMStateDescription *sub_vmsd; |
| 167 | |
| 168 | len = qemu_peek_byte(f, 1); |
| 169 | if (len < strlen(vmsd->name) + 1) { |
| 170 | /* subsection name has be be "section_name/a" */ |
| 171 | return 0; |
| 172 | } |
| 173 | size = qemu_peek_buffer(f, (uint8_t *)idstr, len, 2); |
| 174 | if (size != len) { |
| 175 | return 0; |
| 176 | } |
| 177 | idstr[size] = 0; |
| 178 | |
| 179 | if (strncmp(vmsd->name, idstr, strlen(vmsd->name)) != 0) { |
| 180 | /* it don't have a valid subsection name */ |
| 181 | return 0; |
| 182 | } |
| 183 | sub_vmsd = vmstate_get_subsection(vmsd->subsections, idstr); |
| 184 | if (sub_vmsd == NULL) { |
| 185 | return -ENOENT; |
| 186 | } |
| 187 | qemu_file_skip(f, 1); /* subsection */ |
| 188 | qemu_file_skip(f, 1); /* len */ |
| 189 | qemu_file_skip(f, len); /* idstr */ |
| 190 | version_id = qemu_get_be32(f); |
| 191 | |
| 192 | ret = vmstate_load_state(f, sub_vmsd, opaque, version_id); |
| 193 | if (ret) { |
| 194 | return ret; |
| 195 | } |
| 196 | } |
| 197 | return 0; |
| 198 | } |
| 199 | |
| 200 | static void vmstate_subsection_save(QEMUFile *f, const VMStateDescription *vmsd, |
| 201 | void *opaque) |
| 202 | { |
| 203 | const VMStateSubsection *sub = vmsd->subsections; |
| 204 | |
| 205 | while (sub && sub->needed) { |
| 206 | if (sub->needed(opaque)) { |
| 207 | const VMStateDescription *vmsd = sub->vmsd; |
| 208 | uint8_t len; |
| 209 | |
| 210 | qemu_put_byte(f, QEMU_VM_SUBSECTION); |
| 211 | len = strlen(vmsd->name); |
| 212 | qemu_put_byte(f, len); |
| 213 | qemu_put_buffer(f, (uint8_t *)vmsd->name, len); |
| 214 | qemu_put_be32(f, vmsd->version_id); |
| 215 | vmstate_save_state(f, vmsd, opaque); |
| 216 | } |
| 217 | sub++; |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | /* bool */ |
| 222 | |
| 223 | static int get_bool(QEMUFile *f, void *pv, size_t size) |
| 224 | { |
| 225 | bool *v = pv; |
| 226 | *v = qemu_get_byte(f); |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | static void put_bool(QEMUFile *f, void *pv, size_t size) |
| 231 | { |
| 232 | bool *v = pv; |
| 233 | qemu_put_byte(f, *v); |
| 234 | } |
| 235 | |
| 236 | const VMStateInfo vmstate_info_bool = { |
| 237 | .name = "bool", |
| 238 | .get = get_bool, |
| 239 | .put = put_bool, |
| 240 | }; |
| 241 | |
| 242 | /* 8 bit int */ |
| 243 | |
| 244 | static int get_int8(QEMUFile *f, void *pv, size_t size) |
| 245 | { |
| 246 | int8_t *v = pv; |
| 247 | qemu_get_s8s(f, v); |
| 248 | return 0; |
| 249 | } |
| 250 | |
| 251 | static void put_int8(QEMUFile *f, void *pv, size_t size) |
| 252 | { |
| 253 | int8_t *v = pv; |
| 254 | qemu_put_s8s(f, v); |
| 255 | } |
| 256 | |
| 257 | const VMStateInfo vmstate_info_int8 = { |
| 258 | .name = "int8", |
| 259 | .get = get_int8, |
| 260 | .put = put_int8, |
| 261 | }; |
| 262 | |
| 263 | /* 16 bit int */ |
| 264 | |
| 265 | static int get_int16(QEMUFile *f, void *pv, size_t size) |
| 266 | { |
| 267 | int16_t *v = pv; |
| 268 | qemu_get_sbe16s(f, v); |
| 269 | return 0; |
| 270 | } |
| 271 | |
| 272 | static void put_int16(QEMUFile *f, void *pv, size_t size) |
| 273 | { |
| 274 | int16_t *v = pv; |
| 275 | qemu_put_sbe16s(f, v); |
| 276 | } |
| 277 | |
| 278 | const VMStateInfo vmstate_info_int16 = { |
| 279 | .name = "int16", |
| 280 | .get = get_int16, |
| 281 | .put = put_int16, |
| 282 | }; |
| 283 | |
| 284 | /* 32 bit int */ |
| 285 | |
| 286 | static int get_int32(QEMUFile *f, void *pv, size_t size) |
| 287 | { |
| 288 | int32_t *v = pv; |
| 289 | qemu_get_sbe32s(f, v); |
| 290 | return 0; |
| 291 | } |
| 292 | |
| 293 | static void put_int32(QEMUFile *f, void *pv, size_t size) |
| 294 | { |
| 295 | int32_t *v = pv; |
| 296 | qemu_put_sbe32s(f, v); |
| 297 | } |
| 298 | |
| 299 | const VMStateInfo vmstate_info_int32 = { |
| 300 | .name = "int32", |
| 301 | .get = get_int32, |
| 302 | .put = put_int32, |
| 303 | }; |
| 304 | |
| 305 | /* 32 bit int. See that the received value is the same than the one |
| 306 | in the field */ |
| 307 | |
| 308 | static int get_int32_equal(QEMUFile *f, void *pv, size_t size) |
| 309 | { |
| 310 | int32_t *v = pv; |
| 311 | int32_t v2; |
| 312 | qemu_get_sbe32s(f, &v2); |
| 313 | |
| 314 | if (*v == v2) { |
| 315 | return 0; |
| 316 | } |
| 317 | return -EINVAL; |
| 318 | } |
| 319 | |
| 320 | const VMStateInfo vmstate_info_int32_equal = { |
| 321 | .name = "int32 equal", |
| 322 | .get = get_int32_equal, |
| 323 | .put = put_int32, |
| 324 | }; |
| 325 | |
Dr. David Alan Gilbert | 24a370e | 2014-02-12 17:20:10 +0000 | [diff] [blame] | 326 | /* 32 bit int. Check that the received value is less than or equal to |
| 327 | the one in the field */ |
Eduardo Habkost | b6fcfa5 | 2013-11-28 12:01:15 -0200 | [diff] [blame] | 328 | |
| 329 | static int get_int32_le(QEMUFile *f, void *pv, size_t size) |
| 330 | { |
Dr. David Alan Gilbert | 24a370e | 2014-02-12 17:20:10 +0000 | [diff] [blame] | 331 | int32_t *cur = pv; |
| 332 | int32_t loaded; |
| 333 | qemu_get_sbe32s(f, &loaded); |
Eduardo Habkost | b6fcfa5 | 2013-11-28 12:01:15 -0200 | [diff] [blame] | 334 | |
Dr. David Alan Gilbert | 24a370e | 2014-02-12 17:20:10 +0000 | [diff] [blame] | 335 | if (loaded <= *cur) { |
| 336 | *cur = loaded; |
Eduardo Habkost | b6fcfa5 | 2013-11-28 12:01:15 -0200 | [diff] [blame] | 337 | return 0; |
| 338 | } |
| 339 | return -EINVAL; |
| 340 | } |
| 341 | |
| 342 | const VMStateInfo vmstate_info_int32_le = { |
Dr. David Alan Gilbert | 24a370e | 2014-02-12 17:20:10 +0000 | [diff] [blame] | 343 | .name = "int32 le", |
Eduardo Habkost | b6fcfa5 | 2013-11-28 12:01:15 -0200 | [diff] [blame] | 344 | .get = get_int32_le, |
| 345 | .put = put_int32, |
| 346 | }; |
| 347 | |
| 348 | /* 64 bit int */ |
| 349 | |
| 350 | static int get_int64(QEMUFile *f, void *pv, size_t size) |
| 351 | { |
| 352 | int64_t *v = pv; |
| 353 | qemu_get_sbe64s(f, v); |
| 354 | return 0; |
| 355 | } |
| 356 | |
| 357 | static void put_int64(QEMUFile *f, void *pv, size_t size) |
| 358 | { |
| 359 | int64_t *v = pv; |
| 360 | qemu_put_sbe64s(f, v); |
| 361 | } |
| 362 | |
| 363 | const VMStateInfo vmstate_info_int64 = { |
| 364 | .name = "int64", |
| 365 | .get = get_int64, |
| 366 | .put = put_int64, |
| 367 | }; |
| 368 | |
| 369 | /* 8 bit unsigned int */ |
| 370 | |
| 371 | static int get_uint8(QEMUFile *f, void *pv, size_t size) |
| 372 | { |
| 373 | uint8_t *v = pv; |
| 374 | qemu_get_8s(f, v); |
| 375 | return 0; |
| 376 | } |
| 377 | |
| 378 | static void put_uint8(QEMUFile *f, void *pv, size_t size) |
| 379 | { |
| 380 | uint8_t *v = pv; |
| 381 | qemu_put_8s(f, v); |
| 382 | } |
| 383 | |
| 384 | const VMStateInfo vmstate_info_uint8 = { |
| 385 | .name = "uint8", |
| 386 | .get = get_uint8, |
| 387 | .put = put_uint8, |
| 388 | }; |
| 389 | |
| 390 | /* 16 bit unsigned int */ |
| 391 | |
| 392 | static int get_uint16(QEMUFile *f, void *pv, size_t size) |
| 393 | { |
| 394 | uint16_t *v = pv; |
| 395 | qemu_get_be16s(f, v); |
| 396 | return 0; |
| 397 | } |
| 398 | |
| 399 | static void put_uint16(QEMUFile *f, void *pv, size_t size) |
| 400 | { |
| 401 | uint16_t *v = pv; |
| 402 | qemu_put_be16s(f, v); |
| 403 | } |
| 404 | |
| 405 | const VMStateInfo vmstate_info_uint16 = { |
| 406 | .name = "uint16", |
| 407 | .get = get_uint16, |
| 408 | .put = put_uint16, |
| 409 | }; |
| 410 | |
| 411 | /* 32 bit unsigned int */ |
| 412 | |
| 413 | static int get_uint32(QEMUFile *f, void *pv, size_t size) |
| 414 | { |
| 415 | uint32_t *v = pv; |
| 416 | qemu_get_be32s(f, v); |
| 417 | return 0; |
| 418 | } |
| 419 | |
| 420 | static void put_uint32(QEMUFile *f, void *pv, size_t size) |
| 421 | { |
| 422 | uint32_t *v = pv; |
| 423 | qemu_put_be32s(f, v); |
| 424 | } |
| 425 | |
| 426 | const VMStateInfo vmstate_info_uint32 = { |
| 427 | .name = "uint32", |
| 428 | .get = get_uint32, |
| 429 | .put = put_uint32, |
| 430 | }; |
| 431 | |
| 432 | /* 32 bit uint. See that the received value is the same than the one |
| 433 | in the field */ |
| 434 | |
| 435 | static int get_uint32_equal(QEMUFile *f, void *pv, size_t size) |
| 436 | { |
| 437 | uint32_t *v = pv; |
| 438 | uint32_t v2; |
| 439 | qemu_get_be32s(f, &v2); |
| 440 | |
| 441 | if (*v == v2) { |
| 442 | return 0; |
| 443 | } |
| 444 | return -EINVAL; |
| 445 | } |
| 446 | |
| 447 | const VMStateInfo vmstate_info_uint32_equal = { |
| 448 | .name = "uint32 equal", |
| 449 | .get = get_uint32_equal, |
| 450 | .put = put_uint32, |
| 451 | }; |
| 452 | |
| 453 | /* 64 bit unsigned int */ |
| 454 | |
| 455 | static int get_uint64(QEMUFile *f, void *pv, size_t size) |
| 456 | { |
| 457 | uint64_t *v = pv; |
| 458 | qemu_get_be64s(f, v); |
| 459 | return 0; |
| 460 | } |
| 461 | |
| 462 | static void put_uint64(QEMUFile *f, void *pv, size_t size) |
| 463 | { |
| 464 | uint64_t *v = pv; |
| 465 | qemu_put_be64s(f, v); |
| 466 | } |
| 467 | |
| 468 | const VMStateInfo vmstate_info_uint64 = { |
| 469 | .name = "uint64", |
| 470 | .get = get_uint64, |
| 471 | .put = put_uint64, |
| 472 | }; |
| 473 | |
| 474 | /* 64 bit unsigned int. See that the received value is the same than the one |
| 475 | in the field */ |
| 476 | |
| 477 | static int get_uint64_equal(QEMUFile *f, void *pv, size_t size) |
| 478 | { |
| 479 | uint64_t *v = pv; |
| 480 | uint64_t v2; |
| 481 | qemu_get_be64s(f, &v2); |
| 482 | |
| 483 | if (*v == v2) { |
| 484 | return 0; |
| 485 | } |
| 486 | return -EINVAL; |
| 487 | } |
| 488 | |
| 489 | const VMStateInfo vmstate_info_uint64_equal = { |
| 490 | .name = "int64 equal", |
| 491 | .get = get_uint64_equal, |
| 492 | .put = put_uint64, |
| 493 | }; |
| 494 | |
| 495 | /* 8 bit int. See that the received value is the same than the one |
| 496 | in the field */ |
| 497 | |
| 498 | static int get_uint8_equal(QEMUFile *f, void *pv, size_t size) |
| 499 | { |
| 500 | uint8_t *v = pv; |
| 501 | uint8_t v2; |
| 502 | qemu_get_8s(f, &v2); |
| 503 | |
| 504 | if (*v == v2) { |
| 505 | return 0; |
| 506 | } |
| 507 | return -EINVAL; |
| 508 | } |
| 509 | |
| 510 | const VMStateInfo vmstate_info_uint8_equal = { |
| 511 | .name = "uint8 equal", |
| 512 | .get = get_uint8_equal, |
| 513 | .put = put_uint8, |
| 514 | }; |
| 515 | |
| 516 | /* 16 bit unsigned int int. See that the received value is the same than the one |
| 517 | in the field */ |
| 518 | |
| 519 | static int get_uint16_equal(QEMUFile *f, void *pv, size_t size) |
| 520 | { |
| 521 | uint16_t *v = pv; |
| 522 | uint16_t v2; |
| 523 | qemu_get_be16s(f, &v2); |
| 524 | |
| 525 | if (*v == v2) { |
| 526 | return 0; |
| 527 | } |
| 528 | return -EINVAL; |
| 529 | } |
| 530 | |
| 531 | const VMStateInfo vmstate_info_uint16_equal = { |
| 532 | .name = "uint16 equal", |
| 533 | .get = get_uint16_equal, |
| 534 | .put = put_uint16, |
| 535 | }; |
| 536 | |
| 537 | /* floating point */ |
| 538 | |
| 539 | static int get_float64(QEMUFile *f, void *pv, size_t size) |
| 540 | { |
| 541 | float64 *v = pv; |
| 542 | |
| 543 | *v = make_float64(qemu_get_be64(f)); |
| 544 | return 0; |
| 545 | } |
| 546 | |
| 547 | static void put_float64(QEMUFile *f, void *pv, size_t size) |
| 548 | { |
| 549 | uint64_t *v = pv; |
| 550 | |
| 551 | qemu_put_be64(f, float64_val(*v)); |
| 552 | } |
| 553 | |
| 554 | const VMStateInfo vmstate_info_float64 = { |
| 555 | .name = "float64", |
| 556 | .get = get_float64, |
| 557 | .put = put_float64, |
| 558 | }; |
| 559 | |
| 560 | /* uint8_t buffers */ |
| 561 | |
| 562 | static int get_buffer(QEMUFile *f, void *pv, size_t size) |
| 563 | { |
| 564 | uint8_t *v = pv; |
| 565 | qemu_get_buffer(f, v, size); |
| 566 | return 0; |
| 567 | } |
| 568 | |
| 569 | static void put_buffer(QEMUFile *f, void *pv, size_t size) |
| 570 | { |
| 571 | uint8_t *v = pv; |
| 572 | qemu_put_buffer(f, v, size); |
| 573 | } |
| 574 | |
| 575 | const VMStateInfo vmstate_info_buffer = { |
| 576 | .name = "buffer", |
| 577 | .get = get_buffer, |
| 578 | .put = put_buffer, |
| 579 | }; |
| 580 | |
| 581 | /* unused buffers: space that was used for some fields that are |
| 582 | not useful anymore */ |
| 583 | |
| 584 | static int get_unused_buffer(QEMUFile *f, void *pv, size_t size) |
| 585 | { |
| 586 | uint8_t buf[1024]; |
| 587 | int block_len; |
| 588 | |
| 589 | while (size > 0) { |
| 590 | block_len = MIN(sizeof(buf), size); |
| 591 | size -= block_len; |
| 592 | qemu_get_buffer(f, buf, block_len); |
| 593 | } |
| 594 | return 0; |
| 595 | } |
| 596 | |
| 597 | static void put_unused_buffer(QEMUFile *f, void *pv, size_t size) |
| 598 | { |
| 599 | static const uint8_t buf[1024]; |
| 600 | int block_len; |
| 601 | |
| 602 | while (size > 0) { |
| 603 | block_len = MIN(sizeof(buf), size); |
| 604 | size -= block_len; |
| 605 | qemu_put_buffer(f, buf, block_len); |
| 606 | } |
| 607 | } |
| 608 | |
| 609 | const VMStateInfo vmstate_info_unused_buffer = { |
| 610 | .name = "unused_buffer", |
| 611 | .get = get_unused_buffer, |
| 612 | .put = put_unused_buffer, |
| 613 | }; |
| 614 | |
| 615 | /* bitmaps (as defined by bitmap.h). Note that size here is the size |
| 616 | * of the bitmap in bits. The on-the-wire format of a bitmap is 64 |
| 617 | * bit words with the bits in big endian order. The in-memory format |
| 618 | * is an array of 'unsigned long', which may be either 32 or 64 bits. |
| 619 | */ |
| 620 | /* This is the number of 64 bit words sent over the wire */ |
| 621 | #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64) |
| 622 | static int get_bitmap(QEMUFile *f, void *pv, size_t size) |
| 623 | { |
| 624 | unsigned long *bmp = pv; |
| 625 | int i, idx = 0; |
| 626 | for (i = 0; i < BITS_TO_U64S(size); i++) { |
| 627 | uint64_t w = qemu_get_be64(f); |
| 628 | bmp[idx++] = w; |
| 629 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { |
| 630 | bmp[idx++] = w >> 32; |
| 631 | } |
| 632 | } |
| 633 | return 0; |
| 634 | } |
| 635 | |
| 636 | static void put_bitmap(QEMUFile *f, void *pv, size_t size) |
| 637 | { |
| 638 | unsigned long *bmp = pv; |
| 639 | int i, idx = 0; |
| 640 | for (i = 0; i < BITS_TO_U64S(size); i++) { |
| 641 | uint64_t w = bmp[idx++]; |
| 642 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { |
| 643 | w |= ((uint64_t)bmp[idx++]) << 32; |
| 644 | } |
| 645 | qemu_put_be64(f, w); |
| 646 | } |
| 647 | } |
| 648 | |
| 649 | const VMStateInfo vmstate_info_bitmap = { |
| 650 | .name = "bitmap", |
| 651 | .get = get_bitmap, |
| 652 | .put = put_bitmap, |
| 653 | }; |