| 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/cpu-float.h" |
| 15 | #include "qemu-file.h" |
| 16 | #include "migration.h" |
| 17 | #include "migration/vmstate.h" |
| 18 | #include "migration/client-options.h" |
| 19 | #include "qemu/error-report.h" |
| 20 | #include "qemu/queue.h" |
| 21 | #include "trace.h" |
| 22 | #include "qapi/error.h" |
| 23 | |
| 24 | /* bool */ |
| 25 | |
| 26 | static bool load_bool(QEMUFile *f, void *pv, size_t size, |
| 27 | const VMStateField *field, Error **errp) |
| 28 | { |
| 29 | bool *v = pv; |
| 30 | *v = qemu_get_byte(f); |
| 31 | return true; |
| 32 | } |
| 33 | |
| 34 | static bool save_bool(QEMUFile *f, void *pv, size_t size, |
| 35 | const VMStateField *field, JSONWriter *vmdesc, |
| 36 | Error **errp) |
| 37 | { |
| 38 | bool *v = pv; |
| 39 | qemu_put_byte(f, *v); |
| 40 | return true; |
| 41 | } |
| 42 | |
| 43 | const VMStateInfo vmstate_info_bool = { |
| 44 | .name = "bool", |
| 45 | .load = load_bool, |
| 46 | .save = save_bool, |
| 47 | }; |
| 48 | |
| 49 | /* 8 bit int */ |
| 50 | |
| 51 | static bool load_int8(QEMUFile *f, void *pv, size_t size, |
| 52 | const VMStateField *field, Error **errp) |
| 53 | { |
| 54 | int8_t *v = pv; |
| 55 | qemu_get_s8s(f, v); |
| 56 | return true; |
| 57 | } |
| 58 | |
| 59 | static bool save_int8(QEMUFile *f, void *pv, size_t size, |
| 60 | const VMStateField *field, JSONWriter *vmdesc, |
| 61 | Error **errp) |
| 62 | { |
| 63 | int8_t *v = pv; |
| 64 | qemu_put_s8s(f, v); |
| 65 | return true; |
| 66 | } |
| 67 | |
| 68 | const VMStateInfo vmstate_info_int8 = { |
| 69 | .name = "int8", |
| 70 | .load = load_int8, |
| 71 | .save = save_int8, |
| 72 | }; |
| 73 | |
| 74 | /* 16 bit int */ |
| 75 | |
| 76 | static bool load_int16(QEMUFile *f, void *pv, size_t size, |
| 77 | const VMStateField *field, Error **errp) |
| 78 | { |
| 79 | int16_t *v = pv; |
| 80 | qemu_get_sbe16s(f, v); |
| 81 | return true; |
| 82 | } |
| 83 | |
| 84 | static bool save_int16(QEMUFile *f, void *pv, size_t size, |
| 85 | const VMStateField *field, JSONWriter *vmdesc, |
| 86 | Error **errp) |
| 87 | { |
| 88 | int16_t *v = pv; |
| 89 | qemu_put_sbe16s(f, v); |
| 90 | return true; |
| 91 | } |
| 92 | |
| 93 | const VMStateInfo vmstate_info_int16 = { |
| 94 | .name = "int16", |
| 95 | .load = load_int16, |
| 96 | .save = save_int16, |
| 97 | }; |
| 98 | |
| 99 | /* 32 bit int */ |
| 100 | |
| 101 | static bool load_int32(QEMUFile *f, void *pv, size_t size, |
| 102 | const VMStateField *field, Error **errp) |
| 103 | { |
| 104 | int32_t *v = pv; |
| 105 | qemu_get_sbe32s(f, v); |
| 106 | return true; |
| 107 | } |
| 108 | |
| 109 | static bool save_int32(QEMUFile *f, void *pv, size_t size, |
| 110 | const VMStateField *field, JSONWriter *vmdesc, |
| 111 | Error **errp) |
| 112 | { |
| 113 | int32_t *v = pv; |
| 114 | qemu_put_sbe32s(f, v); |
| 115 | return true; |
| 116 | } |
| 117 | |
| 118 | const VMStateInfo vmstate_info_int32 = { |
| 119 | .name = "int32", |
| 120 | .load = load_int32, |
| 121 | .save = save_int32, |
| 122 | }; |
| 123 | |
| 124 | /* 32 bit int. See that the received value is the same than the one |
| 125 | in the field */ |
| 126 | |
| 127 | static bool load_int32_equal(QEMUFile *f, void *pv, size_t size, |
| 128 | const VMStateField *field, Error **errp) |
| 129 | { |
| 130 | ERRP_GUARD(); |
| 131 | int32_t *v = pv; |
| 132 | int32_t v2; |
| 133 | qemu_get_sbe32s(f, &v2); |
| 134 | |
| 135 | if (*v == v2) { |
| 136 | return true; |
| 137 | } |
| 138 | |
| 139 | error_setg(errp, "%" PRIx32 " != %" PRIx32, *v, v2); |
| 140 | return false; |
| 141 | } |
| 142 | |
| 143 | const VMStateInfo vmstate_info_int32_equal = { |
| 144 | .name = "int32 equal", |
| 145 | .load = load_int32_equal, |
| 146 | .save = save_int32, |
| 147 | }; |
| 148 | |
| 149 | /* 32 bit int. Check that the received value is non-negative |
| 150 | * and less than or equal to the one in the field. |
| 151 | */ |
| 152 | |
| 153 | static bool load_int32_le(QEMUFile *f, void *pv, size_t size, |
| 154 | const VMStateField *field, Error **errp) |
| 155 | { |
| 156 | int32_t *cur = pv; |
| 157 | int32_t loaded; |
| 158 | qemu_get_sbe32s(f, &loaded); |
| 159 | |
| 160 | if (loaded >= 0 && loaded <= *cur) { |
| 161 | *cur = loaded; |
| 162 | return true; |
| 163 | } |
| 164 | |
| 165 | error_setg(errp, "Invalid value %" PRId32 |
| 166 | " expecting positive value <= %" PRId32, |
| 167 | loaded, *cur); |
| 168 | return false; |
| 169 | } |
| 170 | |
| 171 | const VMStateInfo vmstate_info_int32_le = { |
| 172 | .name = "int32 le", |
| 173 | .load = load_int32_le, |
| 174 | .save = save_int32, |
| 175 | }; |
| 176 | |
| 177 | /* 64 bit int */ |
| 178 | |
| 179 | static bool load_int64(QEMUFile *f, void *pv, size_t size, |
| 180 | const VMStateField *field, Error **errp) |
| 181 | { |
| 182 | int64_t *v = pv; |
| 183 | qemu_get_sbe64s(f, v); |
| 184 | return true; |
| 185 | } |
| 186 | |
| 187 | static bool save_int64(QEMUFile *f, void *pv, size_t size, |
| 188 | const VMStateField *field, JSONWriter *vmdesc, |
| 189 | Error **errp) |
| 190 | { |
| 191 | int64_t *v = pv; |
| 192 | qemu_put_sbe64s(f, v); |
| 193 | return true; |
| 194 | } |
| 195 | |
| 196 | const VMStateInfo vmstate_info_int64 = { |
| 197 | .name = "int64", |
| 198 | .load = load_int64, |
| 199 | .save = save_int64, |
| 200 | }; |
| 201 | |
| 202 | /* 8 bit unsigned int */ |
| 203 | |
| 204 | static bool load_uint8(QEMUFile *f, void *pv, size_t size, |
| 205 | const VMStateField *field, Error **errp) |
| 206 | { |
| 207 | uint8_t *v = pv; |
| 208 | qemu_get_8s(f, v); |
| 209 | return true; |
| 210 | } |
| 211 | |
| 212 | static bool save_uint8(QEMUFile *f, void *pv, size_t size, |
| 213 | const VMStateField *field, JSONWriter *vmdesc, |
| 214 | Error **errp) |
| 215 | { |
| 216 | uint8_t *v = pv; |
| 217 | qemu_put_8s(f, v); |
| 218 | return true; |
| 219 | } |
| 220 | |
| 221 | const VMStateInfo vmstate_info_uint8 = { |
| 222 | .name = "uint8", |
| 223 | .load = load_uint8, |
| 224 | .save = save_uint8, |
| 225 | }; |
| 226 | |
| 227 | /* 16 bit unsigned int */ |
| 228 | |
| 229 | static bool load_uint16(QEMUFile *f, void *pv, size_t size, |
| 230 | const VMStateField *field, Error **errp) |
| 231 | { |
| 232 | uint16_t *v = pv; |
| 233 | qemu_get_be16s(f, v); |
| 234 | return true; |
| 235 | } |
| 236 | |
| 237 | static bool save_uint16(QEMUFile *f, void *pv, size_t size, |
| 238 | const VMStateField *field, JSONWriter *vmdesc, |
| 239 | Error **errp) |
| 240 | { |
| 241 | uint16_t *v = pv; |
| 242 | qemu_put_be16s(f, v); |
| 243 | return true; |
| 244 | } |
| 245 | |
| 246 | const VMStateInfo vmstate_info_uint16 = { |
| 247 | .name = "uint16", |
| 248 | .load = load_uint16, |
| 249 | .save = save_uint16, |
| 250 | }; |
| 251 | |
| 252 | /* 32 bit unsigned int */ |
| 253 | |
| 254 | static bool load_uint32(QEMUFile *f, void *pv, size_t size, |
| 255 | const VMStateField *field, Error **errp) |
| 256 | { |
| 257 | uint32_t *v = pv; |
| 258 | qemu_get_be32s(f, v); |
| 259 | return true; |
| 260 | } |
| 261 | |
| 262 | static bool save_uint32(QEMUFile *f, void *pv, size_t size, |
| 263 | const VMStateField *field, JSONWriter *vmdesc, |
| 264 | Error **errp) |
| 265 | { |
| 266 | uint32_t *v = pv; |
| 267 | qemu_put_be32s(f, v); |
| 268 | return true; |
| 269 | } |
| 270 | |
| 271 | const VMStateInfo vmstate_info_uint32 = { |
| 272 | .name = "uint32", |
| 273 | .load = load_uint32, |
| 274 | .save = save_uint32, |
| 275 | }; |
| 276 | |
| 277 | /* 32 bit uint. See that the received value is the same than the one |
| 278 | in the field */ |
| 279 | |
| 280 | static bool load_uint32_equal(QEMUFile *f, void *pv, size_t size, |
| 281 | const VMStateField *field, Error **errp) |
| 282 | { |
| 283 | ERRP_GUARD(); |
| 284 | uint32_t *v = pv; |
| 285 | uint32_t v2; |
| 286 | qemu_get_be32s(f, &v2); |
| 287 | |
| 288 | if (*v == v2) { |
| 289 | return true; |
| 290 | } |
| 291 | |
| 292 | error_setg(errp, "%" PRIx32 " != %" PRIx32, *v, v2); |
| 293 | return false; |
| 294 | } |
| 295 | |
| 296 | const VMStateInfo vmstate_info_uint32_equal = { |
| 297 | .name = "uint32 equal", |
| 298 | .load = load_uint32_equal, |
| 299 | .save = save_uint32, |
| 300 | }; |
| 301 | |
| 302 | /* 64 bit unsigned int */ |
| 303 | |
| 304 | static bool load_uint64(QEMUFile *f, void *pv, size_t size, |
| 305 | const VMStateField *field, Error **errp) |
| 306 | { |
| 307 | uint64_t *v = pv; |
| 308 | qemu_get_be64s(f, v); |
| 309 | return true; |
| 310 | } |
| 311 | |
| 312 | static bool save_uint64(QEMUFile *f, void *pv, size_t size, |
| 313 | const VMStateField *field, JSONWriter *vmdesc, |
| 314 | Error **errp) |
| 315 | { |
| 316 | uint64_t *v = pv; |
| 317 | qemu_put_be64s(f, v); |
| 318 | return true; |
| 319 | } |
| 320 | |
| 321 | const VMStateInfo vmstate_info_uint64 = { |
| 322 | .name = "uint64", |
| 323 | .load = load_uint64, |
| 324 | .save = save_uint64, |
| 325 | }; |
| 326 | |
| 327 | /* File descriptor communicated via SCM_RIGHTS */ |
| 328 | |
| 329 | static bool load_fd(QEMUFile *f, void *pv, size_t size, |
| 330 | const VMStateField *field, Error **errp) |
| 331 | { |
| 332 | int32_t *v = pv; |
| 333 | |
| 334 | if (migrate_mode() == MIG_MODE_CPR_EXEC) { |
| 335 | qemu_get_sbe32s(f, v); |
| 336 | return true; |
| 337 | } |
| 338 | |
| 339 | return qemu_file_get_fd(f, v) >= 0; |
| 340 | } |
| 341 | |
| 342 | static bool save_fd(QEMUFile *f, void *pv, size_t size, |
| 343 | const VMStateField *field, JSONWriter *vmdesc, |
| 344 | Error **errp) |
| 345 | { |
| 346 | int32_t *v = pv; |
| 347 | |
| 348 | if (migrate_mode() == MIG_MODE_CPR_EXEC) { |
| 349 | qemu_put_sbe32s(f, v); |
| 350 | return true; |
| 351 | } |
| 352 | |
| 353 | return qemu_file_put_fd(f, *v) >= 0; |
| 354 | } |
| 355 | |
| 356 | const VMStateInfo vmstate_info_fd = { |
| 357 | .name = "fd", |
| 358 | .load = load_fd, |
| 359 | .save = save_fd, |
| 360 | }; |
| 361 | |
| 362 | static bool load_ptr_marker(QEMUFile *f, void *pv, size_t size, |
| 363 | const VMStateField *field, Error **errp) |
| 364 | |
| 365 | { |
| 366 | /* |
| 367 | * Load is done in vmstate core, see vmstate_ptr_marker_load(). |
| 368 | */ |
| 369 | g_assert_not_reached(); |
| 370 | return false; |
| 371 | } |
| 372 | |
| 373 | static bool save_ptr_marker(QEMUFile *f, void *pv, size_t size, |
| 374 | const VMStateField *field, JSONWriter *vmdesc, |
| 375 | Error **errp) |
| 376 | |
| 377 | { |
| 378 | qemu_put_byte(f, pv ? VMS_MARKER_PTR_VALID : VMS_MARKER_PTR_NULL); |
| 379 | return true; |
| 380 | } |
| 381 | |
| 382 | const VMStateInfo vmstate_info_ptr_marker = { |
| 383 | .name = "ptr-marker", |
| 384 | .load = load_ptr_marker, |
| 385 | .save = save_ptr_marker, |
| 386 | }; |
| 387 | |
| 388 | /* 64 bit unsigned int. See that the received value is the same than the one |
| 389 | in the field */ |
| 390 | |
| 391 | static bool load_uint64_equal(QEMUFile *f, void *pv, size_t size, |
| 392 | const VMStateField *field, Error **errp) |
| 393 | { |
| 394 | ERRP_GUARD(); |
| 395 | uint64_t *v = pv; |
| 396 | uint64_t v2; |
| 397 | |
| 398 | qemu_get_be64s(f, &v2); |
| 399 | |
| 400 | if (*v == v2) { |
| 401 | return true; |
| 402 | } |
| 403 | |
| 404 | error_setg(errp, "%" PRIx64 " != %" PRIx64, *v, v2); |
| 405 | return false; |
| 406 | } |
| 407 | |
| 408 | const VMStateInfo vmstate_info_uint64_equal = { |
| 409 | .name = "int64 equal", |
| 410 | .load = load_uint64_equal, |
| 411 | .save = save_uint64, |
| 412 | }; |
| 413 | |
| 414 | /* 8 bit int. See that the received value is the same than the one |
| 415 | in the field */ |
| 416 | |
| 417 | static bool load_uint8_equal(QEMUFile *f, void *pv, size_t size, |
| 418 | const VMStateField *field, Error **errp) |
| 419 | { |
| 420 | ERRP_GUARD(); |
| 421 | uint8_t *v = pv; |
| 422 | uint8_t v2; |
| 423 | |
| 424 | qemu_get_8s(f, &v2); |
| 425 | |
| 426 | if (*v == v2) { |
| 427 | return true; |
| 428 | } |
| 429 | |
| 430 | error_setg(errp, "%x != %x", *v, v2); |
| 431 | return false; |
| 432 | } |
| 433 | |
| 434 | const VMStateInfo vmstate_info_uint8_equal = { |
| 435 | .name = "uint8 equal", |
| 436 | .load = load_uint8_equal, |
| 437 | .save = save_uint8, |
| 438 | }; |
| 439 | |
| 440 | /* 16 bit unsigned int int. See that the received value is the same than the one |
| 441 | in the field */ |
| 442 | |
| 443 | static bool load_uint16_equal(QEMUFile *f, void *pv, size_t size, |
| 444 | const VMStateField *field, Error **errp) |
| 445 | { |
| 446 | ERRP_GUARD(); |
| 447 | uint16_t *v = pv; |
| 448 | uint16_t v2; |
| 449 | |
| 450 | qemu_get_be16s(f, &v2); |
| 451 | |
| 452 | if (*v == v2) { |
| 453 | return true; |
| 454 | } |
| 455 | |
| 456 | error_setg(errp, "%x != %x", *v, v2); |
| 457 | return false; |
| 458 | } |
| 459 | |
| 460 | const VMStateInfo vmstate_info_uint16_equal = { |
| 461 | .name = "uint16 equal", |
| 462 | .load = load_uint16_equal, |
| 463 | .save = save_uint16, |
| 464 | }; |
| 465 | |
| 466 | /* CPU_DoubleU type */ |
| 467 | |
| 468 | static bool load_cpudouble(QEMUFile *f, void *pv, size_t size, |
| 469 | const VMStateField *field, Error **errp) |
| 470 | { |
| 471 | CPU_DoubleU *v = pv; |
| 472 | qemu_get_be32s(f, &v->l.upper); |
| 473 | qemu_get_be32s(f, &v->l.lower); |
| 474 | return true; |
| 475 | } |
| 476 | |
| 477 | static bool save_cpudouble(QEMUFile *f, void *pv, size_t size, |
| 478 | const VMStateField *field, JSONWriter *vmdesc, |
| 479 | Error **errp) |
| 480 | { |
| 481 | CPU_DoubleU *v = pv; |
| 482 | qemu_put_be32s(f, &v->l.upper); |
| 483 | qemu_put_be32s(f, &v->l.lower); |
| 484 | return true; |
| 485 | } |
| 486 | |
| 487 | const VMStateInfo vmstate_info_cpudouble = { |
| 488 | .name = "CPU_Double_U", |
| 489 | .load = load_cpudouble, |
| 490 | .save = save_cpudouble, |
| 491 | }; |
| 492 | |
| 493 | /* uint8_t buffers */ |
| 494 | |
| 495 | static bool load_buffer(QEMUFile *f, void *pv, size_t size, |
| 496 | const VMStateField *field, Error **errp) |
| 497 | { |
| 498 | uint8_t *v = pv; |
| 499 | qemu_get_buffer(f, v, size); |
| 500 | return true; |
| 501 | } |
| 502 | |
| 503 | static bool save_buffer(QEMUFile *f, void *pv, size_t size, |
| 504 | const VMStateField *field, JSONWriter *vmdesc, |
| 505 | Error **errp) |
| 506 | { |
| 507 | uint8_t *v = pv; |
| 508 | qemu_put_buffer(f, v, size); |
| 509 | return true; |
| 510 | } |
| 511 | |
| 512 | const VMStateInfo vmstate_info_buffer = { |
| 513 | .name = "buffer", |
| 514 | .load = load_buffer, |
| 515 | .save = save_buffer, |
| 516 | }; |
| 517 | |
| 518 | /* unused buffers: space that was used for some fields that are |
| 519 | not useful anymore */ |
| 520 | |
| 521 | static bool load_unused_buffer(QEMUFile *f, void *pv, size_t size, |
| 522 | const VMStateField *field, Error **errp) |
| 523 | { |
| 524 | uint8_t buf[1024]; |
| 525 | int block_len; |
| 526 | |
| 527 | while (size > 0) { |
| 528 | block_len = MIN(sizeof(buf), size); |
| 529 | size -= block_len; |
| 530 | qemu_get_buffer(f, buf, block_len); |
| 531 | } |
| 532 | |
| 533 | return true; |
| 534 | } |
| 535 | |
| 536 | static bool save_unused_buffer(QEMUFile *f, void *pv, size_t size, |
| 537 | const VMStateField *field, JSONWriter *vmdesc, |
| 538 | Error **errp) |
| 539 | { |
| 540 | static const uint8_t buf[1024]; |
| 541 | int block_len; |
| 542 | |
| 543 | while (size > 0) { |
| 544 | block_len = MIN(sizeof(buf), size); |
| 545 | size -= block_len; |
| 546 | qemu_put_buffer(f, buf, block_len); |
| 547 | } |
| 548 | |
| 549 | return true; |
| 550 | } |
| 551 | |
| 552 | const VMStateInfo vmstate_info_unused_buffer = { |
| 553 | .name = "unused_buffer", |
| 554 | .load = load_unused_buffer, |
| 555 | .save = save_unused_buffer, |
| 556 | }; |
| 557 | |
| 558 | /* vmstate_info_tmp, see VMSTATE_WITH_TMP, the idea is that we allocate |
| 559 | * a temporary buffer and the pre_load/pre_save methods in the child vmsd |
| 560 | * copy stuff from the parent into the child and do calculations to fill |
| 561 | * in fields that don't really exist in the parent but need to be in the |
| 562 | * stream. |
| 563 | */ |
| 564 | static bool load_tmp(QEMUFile *f, void *pv, size_t size, |
| 565 | const VMStateField *field, Error **errp) |
| 566 | { |
| 567 | const VMStateDescription *vmsd = field->vmsd; |
| 568 | int version_id = field->version_id; |
| 569 | g_autofree void *tmp = g_malloc(size); |
| 570 | |
| 571 | /* Writes the parent field which is at the start of the tmp */ |
| 572 | *(void **)tmp = pv; |
| 573 | return vmstate_load_vmsd(f, vmsd, tmp, version_id, errp); |
| 574 | } |
| 575 | |
| 576 | static bool save_tmp(QEMUFile *f, void *pv, size_t size, |
| 577 | const VMStateField *field, JSONWriter *vmdesc, |
| 578 | Error **errp) |
| 579 | { |
| 580 | const VMStateDescription *vmsd = field->vmsd; |
| 581 | g_autofree void *tmp = g_malloc(size); |
| 582 | |
| 583 | /* Writes the parent field which is at the start of the tmp */ |
| 584 | *(void **)tmp = pv; |
| 585 | return vmstate_save_vmsd(f, vmsd, tmp, vmdesc, errp); |
| 586 | } |
| 587 | |
| 588 | const VMStateInfo vmstate_info_tmp = { |
| 589 | .name = "tmp", |
| 590 | .load = load_tmp, |
| 591 | .save = save_tmp, |
| 592 | }; |
| 593 | |
| 594 | /* bitmaps (as defined by bitmap.h). Note that size here is the size |
| 595 | * of the bitmap in bits. The on-the-wire format of a bitmap is 64 |
| 596 | * bit words with the bits in big endian order. The in-memory format |
| 597 | * is an array of 'unsigned long', which may be either 32 or 64 bits. |
| 598 | */ |
| 599 | /* This is the number of 64 bit words sent over the wire */ |
| 600 | #define BITS_TO_U64S(nr) DIV_ROUND_UP(nr, 64) |
| 601 | static bool load_bitmap(QEMUFile *f, void *pv, size_t size, |
| 602 | const VMStateField *field, Error **errp) |
| 603 | { |
| 604 | unsigned long *bmp = pv; |
| 605 | int i, idx = 0; |
| 606 | |
| 607 | for (i = 0; i < BITS_TO_U64S(size); i++) { |
| 608 | uint64_t w = qemu_get_be64(f); |
| 609 | bmp[idx++] = w; |
| 610 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { |
| 611 | bmp[idx++] = w >> 32; |
| 612 | } |
| 613 | } |
| 614 | |
| 615 | return true; |
| 616 | } |
| 617 | |
| 618 | static bool save_bitmap(QEMUFile *f, void *pv, size_t size, |
| 619 | const VMStateField *field, JSONWriter *vmdesc, |
| 620 | Error **errp) |
| 621 | { |
| 622 | unsigned long *bmp = pv; |
| 623 | int i, idx = 0; |
| 624 | |
| 625 | for (i = 0; i < BITS_TO_U64S(size); i++) { |
| 626 | uint64_t w = bmp[idx++]; |
| 627 | if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) { |
| 628 | w |= ((uint64_t)bmp[idx++]) << 32; |
| 629 | } |
| 630 | qemu_put_be64(f, w); |
| 631 | } |
| 632 | |
| 633 | return true; |
| 634 | } |
| 635 | |
| 636 | const VMStateInfo vmstate_info_bitmap = { |
| 637 | .name = "bitmap", |
| 638 | .load = load_bitmap, |
| 639 | .save = save_bitmap, |
| 640 | }; |
| 641 | |
| 642 | /* get for QTAILQ |
| 643 | * meta data about the QTAILQ is encoded in a VMStateField structure |
| 644 | */ |
| 645 | static bool load_qtailq(QEMUFile *f, void *pv, size_t unused_size, |
| 646 | const VMStateField *field, Error **errp) |
| 647 | { |
| 648 | const VMStateDescription *vmsd = field->vmsd; |
| 649 | /* size of a QTAILQ element */ |
| 650 | size_t size = field->size; |
| 651 | /* offset of the QTAILQ entry in a QTAILQ element */ |
| 652 | size_t entry_offset = field->start; |
| 653 | int version_id = field->version_id; |
| 654 | void *elm; |
| 655 | |
| 656 | trace_load_qtailq(vmsd->name, version_id); |
| 657 | if (version_id > vmsd->version_id) { |
| 658 | error_setg(errp, "%s %s", vmsd->name, "too new"); |
| 659 | return false; |
| 660 | } |
| 661 | if (version_id < vmsd->minimum_version_id) { |
| 662 | error_setg(errp, "%s %s", vmsd->name, "too old"); |
| 663 | return false; |
| 664 | } |
| 665 | |
| 666 | while (qemu_get_byte(f)) { |
| 667 | elm = g_malloc(size); |
| 668 | if (!vmstate_load_vmsd(f, vmsd, elm, version_id, errp)) { |
| 669 | g_free(elm); |
| 670 | return false; |
| 671 | } |
| 672 | QTAILQ_RAW_INSERT_TAIL(pv, elm, entry_offset); |
| 673 | } |
| 674 | |
| 675 | trace_load_qtailq_end(vmsd->name); |
| 676 | return true; |
| 677 | } |
| 678 | |
| 679 | /* save for QTAILQ */ |
| 680 | static bool save_qtailq(QEMUFile *f, void *pv, size_t unused_size, |
| 681 | const VMStateField *field, JSONWriter *vmdesc, |
| 682 | Error **errp) |
| 683 | { |
| 684 | const VMStateDescription *vmsd = field->vmsd; |
| 685 | /* offset of the QTAILQ entry in a QTAILQ element*/ |
| 686 | size_t entry_offset = field->start; |
| 687 | void *elm; |
| 688 | |
| 689 | trace_save_qtailq(vmsd->name, vmsd->version_id); |
| 690 | |
| 691 | QTAILQ_RAW_FOREACH(elm, pv, entry_offset) { |
| 692 | qemu_put_byte(f, true); |
| 693 | if (!vmstate_save_vmsd(f, vmsd, elm, vmdesc, errp)) { |
| 694 | return false; |
| 695 | } |
| 696 | } |
| 697 | qemu_put_byte(f, false); |
| 698 | |
| 699 | trace_save_qtailq_end(vmsd->name); |
| 700 | |
| 701 | return true; |
| 702 | } |
| 703 | const VMStateInfo vmstate_info_qtailq = { |
| 704 | .name = "qtailq", |
| 705 | .load = load_qtailq, |
| 706 | .save = save_qtailq, |
| 707 | }; |
| 708 | |
| 709 | struct save_gtree_data { |
| 710 | QEMUFile *f; |
| 711 | const VMStateDescription *key_vmsd; |
| 712 | const VMStateDescription *val_vmsd; |
| 713 | JSONWriter *vmdesc; |
| 714 | Error **errp; |
| 715 | bool failed; |
| 716 | }; |
| 717 | |
| 718 | /* |
| 719 | * save_gtree_elem - func for g_tree_foreach, return true to stop |
| 720 | * iteration. |
| 721 | */ |
| 722 | static gboolean save_gtree_elem(gpointer key, gpointer value, gpointer data) |
| 723 | { |
| 724 | struct save_gtree_data *capsule = (struct save_gtree_data *)data; |
| 725 | QEMUFile *f = capsule->f; |
| 726 | |
| 727 | qemu_put_byte(f, true); |
| 728 | |
| 729 | /* put the key */ |
| 730 | if (!capsule->key_vmsd) { |
| 731 | qemu_put_be64(f, (uint64_t)(uintptr_t)(key)); /* direct key */ |
| 732 | } else { |
| 733 | if (!vmstate_save_vmsd(f, capsule->key_vmsd, key, capsule->vmdesc, |
| 734 | capsule->errp)) { |
| 735 | capsule->failed = true; |
| 736 | return true; |
| 737 | } |
| 738 | } |
| 739 | |
| 740 | /* put the data */ |
| 741 | if (!vmstate_save_vmsd(f, capsule->val_vmsd, value, capsule->vmdesc, |
| 742 | capsule->errp)) { |
| 743 | capsule->failed = true; |
| 744 | return true; |
| 745 | } |
| 746 | return false; |
| 747 | } |
| 748 | |
| 749 | static bool save_gtree(QEMUFile *f, void *pv, size_t unused_size, |
| 750 | const VMStateField *field, JSONWriter *vmdesc, |
| 751 | Error **errp) |
| 752 | { |
| 753 | bool direct_key = (!field->start); |
| 754 | const VMStateDescription *key_vmsd = direct_key ? NULL : &field->vmsd[1]; |
| 755 | const VMStateDescription *val_vmsd = &field->vmsd[0]; |
| 756 | const char *key_vmsd_name = direct_key ? "direct" : key_vmsd->name; |
| 757 | struct save_gtree_data capsule = { |
| 758 | .f = f, |
| 759 | .key_vmsd = key_vmsd, |
| 760 | .val_vmsd = val_vmsd, |
| 761 | .vmdesc = vmdesc, |
| 762 | .errp = errp, |
| 763 | .failed = false}; |
| 764 | GTree **pval = pv; |
| 765 | GTree *tree = *pval; |
| 766 | uint32_t nnodes = g_tree_nnodes(tree); |
| 767 | |
| 768 | trace_save_gtree(field->name, key_vmsd_name, val_vmsd->name, nnodes); |
| 769 | qemu_put_be32(f, nnodes); |
| 770 | g_tree_foreach(tree, save_gtree_elem, (gpointer)&capsule); |
| 771 | qemu_put_byte(f, false); |
| 772 | if (capsule.failed) { |
| 773 | trace_save_gtree_end(field->name, key_vmsd_name, val_vmsd->name); |
| 774 | return false; |
| 775 | } |
| 776 | |
| 777 | trace_save_gtree_end(field->name, key_vmsd_name, val_vmsd->name); |
| 778 | return true; |
| 779 | } |
| 780 | |
| 781 | static bool load_gtree(QEMUFile *f, void *pv, size_t unused_size, |
| 782 | const VMStateField *field, Error **errp) |
| 783 | { |
| 784 | bool direct_key = (!field->start); |
| 785 | const VMStateDescription *key_vmsd = direct_key ? NULL : &field->vmsd[1]; |
| 786 | const VMStateDescription *val_vmsd = &field->vmsd[0]; |
| 787 | const char *key_vmsd_name = direct_key ? "direct" : key_vmsd->name; |
| 788 | int version_id = field->version_id; |
| 789 | size_t key_size = field->start; |
| 790 | size_t val_size = field->size; |
| 791 | int nnodes, count = 0; |
| 792 | GTree **pval = pv; |
| 793 | GTree *tree = *pval; |
| 794 | void *key, *val; |
| 795 | |
| 796 | /* in case of direct key, the key vmsd can be {}, ie. check fields */ |
| 797 | if (!direct_key && version_id > key_vmsd->version_id) { |
| 798 | error_setg(errp, "%s %s", key_vmsd->name, "too new"); |
| 799 | return false; |
| 800 | } |
| 801 | if (!direct_key && version_id < key_vmsd->minimum_version_id) { |
| 802 | error_setg(errp, "%s %s", key_vmsd->name, "too old"); |
| 803 | return false; |
| 804 | } |
| 805 | if (version_id > val_vmsd->version_id) { |
| 806 | error_setg(errp, "%s %s", val_vmsd->name, "too new"); |
| 807 | return false; |
| 808 | } |
| 809 | if (version_id < val_vmsd->minimum_version_id) { |
| 810 | error_setg(errp, "%s %s", val_vmsd->name, "too old"); |
| 811 | return false; |
| 812 | } |
| 813 | |
| 814 | nnodes = qemu_get_be32(f); |
| 815 | trace_load_gtree(field->name, key_vmsd_name, val_vmsd->name, nnodes); |
| 816 | |
| 817 | while (qemu_get_byte(f)) { |
| 818 | if ((++count) > nnodes) { |
| 819 | break; |
| 820 | } |
| 821 | if (direct_key) { |
| 822 | key = (void *)(uintptr_t)qemu_get_be64(f); |
| 823 | } else { |
| 824 | key = g_malloc0(key_size); |
| 825 | if (!vmstate_load_vmsd(f, key_vmsd, key, version_id, errp)) { |
| 826 | goto key_error; |
| 827 | } |
| 828 | } |
| 829 | val = g_malloc0(val_size); |
| 830 | if (!vmstate_load_vmsd(f, val_vmsd, val, version_id, errp)) { |
| 831 | goto val_error; |
| 832 | } |
| 833 | g_tree_insert(tree, key, val); |
| 834 | } |
| 835 | if (count != nnodes) { |
| 836 | error_setg(errp, "%s inconsistent stream when loading the gtree", |
| 837 | field->name); |
| 838 | return false; |
| 839 | } |
| 840 | |
| 841 | trace_load_gtree_end(field->name, key_vmsd_name, val_vmsd->name); |
| 842 | return true; |
| 843 | |
| 844 | val_error: |
| 845 | g_free(val); |
| 846 | |
| 847 | key_error: |
| 848 | if (!direct_key) { |
| 849 | g_free(key); |
| 850 | } |
| 851 | return false; |
| 852 | } |
| 853 | |
| 854 | |
| 855 | const VMStateInfo vmstate_info_gtree = { |
| 856 | .name = "gtree", |
| 857 | .load = load_gtree, |
| 858 | .save = save_gtree, |
| 859 | }; |
| 860 | |
| 861 | static bool save_qlist(QEMUFile *f, void *pv, size_t unused_size, |
| 862 | const VMStateField *field, JSONWriter *vmdesc, |
| 863 | Error **errp) |
| 864 | { |
| 865 | const VMStateDescription *vmsd = field->vmsd; |
| 866 | /* offset of the QTAILQ entry in a QTAILQ element*/ |
| 867 | size_t entry_offset = field->start; |
| 868 | void *elm; |
| 869 | |
| 870 | trace_save_qlist(field->name, vmsd->name, vmsd->version_id); |
| 871 | QLIST_RAW_FOREACH(elm, pv, entry_offset) { |
| 872 | qemu_put_byte(f, true); |
| 873 | if (!vmstate_save_vmsd(f, vmsd, elm, vmdesc, errp)) { |
| 874 | return false; |
| 875 | } |
| 876 | } |
| 877 | qemu_put_byte(f, false); |
| 878 | trace_save_qlist_end(field->name, vmsd->name); |
| 879 | |
| 880 | return true; |
| 881 | } |
| 882 | |
| 883 | static bool load_qlist(QEMUFile *f, void *pv, size_t unused_size, |
| 884 | const VMStateField *field, Error **errp) |
| 885 | { |
| 886 | const VMStateDescription *vmsd = field->vmsd; |
| 887 | /* size of a QLIST element */ |
| 888 | size_t size = field->size; |
| 889 | /* offset of the QLIST entry in a QLIST element */ |
| 890 | size_t entry_offset = field->start; |
| 891 | int version_id = field->version_id; |
| 892 | void *elm, *prev = NULL; |
| 893 | |
| 894 | trace_load_qlist(field->name, vmsd->name, vmsd->version_id); |
| 895 | if (version_id > vmsd->version_id) { |
| 896 | error_setg(errp, "%s %s", vmsd->name, "too new"); |
| 897 | return false; |
| 898 | } |
| 899 | if (version_id < vmsd->minimum_version_id) { |
| 900 | error_setg(errp, "%s %s", vmsd->name, "too old"); |
| 901 | return false; |
| 902 | } |
| 903 | |
| 904 | while (qemu_get_byte(f)) { |
| 905 | elm = g_malloc(size); |
| 906 | if (!vmstate_load_vmsd(f, vmsd, elm, version_id, errp)) { |
| 907 | g_free(elm); |
| 908 | return false; |
| 909 | } |
| 910 | if (!prev) { |
| 911 | QLIST_RAW_INSERT_HEAD(pv, elm, entry_offset); |
| 912 | } else { |
| 913 | QLIST_RAW_INSERT_AFTER(pv, prev, elm, entry_offset); |
| 914 | } |
| 915 | prev = elm; |
| 916 | } |
| 917 | trace_load_qlist_end(field->name, vmsd->name); |
| 918 | |
| 919 | return true; |
| 920 | } |
| 921 | |
| 922 | const VMStateInfo vmstate_info_qlist = { |
| 923 | .name = "qlist", |
| 924 | .load = load_qlist, |
| 925 | .save = save_qlist, |
| 926 | }; |
| 927 | |
| 928 | static int get_g_byte_array(QEMUFile *f, void *pv, size_t size, |
| 929 | const VMStateField *field) |
| 930 | { |
| 931 | GByteArray *byte_array = *(GByteArray **)pv; |
| 932 | uint32_t len = qemu_get_be32(f); |
| 933 | |
| 934 | g_byte_array_set_size(byte_array, len); |
| 935 | qemu_get_buffer(f, byte_array->data, len); |
| 936 | return 0; |
| 937 | } |
| 938 | |
| 939 | static int put_g_byte_array(QEMUFile *f, void *pv, size_t size, |
| 940 | const VMStateField *field, JSONWriter *vmdesc) |
| 941 | { |
| 942 | GByteArray *byte_array = *(GByteArray **)pv; |
| 943 | |
| 944 | qemu_put_be32(f, byte_array->len); |
| 945 | qemu_put_buffer(f, byte_array->data, byte_array->len); |
| 946 | |
| 947 | return 0; |
| 948 | } |
| 949 | |
| 950 | const VMStateInfo vmstate_info_g_byte_array = { |
| 951 | .name = "GByteArray", |
| 952 | .get = get_g_byte_array, |
| 953 | .put = put_g_byte_array, |
| 954 | }; |