1 /* 2 * QEMU migration capabilities 3 * 4 * Copyright (c) 2012-2023 Red Hat Inc 5 * 6 * Authors: 7 * Orit Wasserman <owasserm@redhat.com> 8 * Juan Quintela <quintela@redhat.com> 9 * 10 * This work is licensed under the terms of the GNU GPL, version 2 or later. 11 * See the COPYING file in the top-level directory. 12 */ 13 14 #include "qemu/osdep.h" 15 #include "qemu/error-report.h" 16 #include "exec/target_page.h" 17 #include "qapi/clone-visitor.h" 18 #include "qapi/error.h" 19 #include "qapi/qapi-commands-migration.h" 20 #include "qapi/qapi-visit-migration.h" 21 #include "qapi/qmp/qerror.h" 22 #include "qapi/qmp/qnull.h" 23 #include "sysemu/runstate.h" 24 #include "migration/colo.h" 25 #include "migration/misc.h" 26 #include "migration.h" 27 #include "migration-stats.h" 28 #include "qemu-file.h" 29 #include "ram.h" 30 #include "options.h" 31 #include "sysemu/kvm.h" 32 33 /* Maximum migrate downtime set to 2000 seconds */ 34 #define MAX_MIGRATE_DOWNTIME_SECONDS 2000 35 #define MAX_MIGRATE_DOWNTIME (MAX_MIGRATE_DOWNTIME_SECONDS * 1000) 36 37 #define MAX_THROTTLE (128 << 20) /* Migration transfer speed throttling */ 38 39 /* Time in milliseconds we are allowed to stop the source, 40 * for sending the last part */ 41 #define DEFAULT_MIGRATE_SET_DOWNTIME 300 42 43 /* Define default autoconverge cpu throttle migration parameters */ 44 #define DEFAULT_MIGRATE_THROTTLE_TRIGGER_THRESHOLD 50 45 #define DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL 20 46 #define DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT 10 47 #define DEFAULT_MIGRATE_MAX_CPU_THROTTLE 99 48 49 /* Migration XBZRLE default cache size */ 50 #define DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE (64 * 1024 * 1024) 51 52 /* The delay time (in ms) between two COLO checkpoints */ 53 #define DEFAULT_MIGRATE_X_CHECKPOINT_DELAY (200 * 100) 54 #define DEFAULT_MIGRATE_MULTIFD_CHANNELS 2 55 #define DEFAULT_MIGRATE_MULTIFD_COMPRESSION MULTIFD_COMPRESSION_NONE 56 /* 0: means nocompress, 1: best speed, ... 9: best compress ratio */ 57 #define DEFAULT_MIGRATE_MULTIFD_ZLIB_LEVEL 1 58 /* 59 * 1: best speed, ... 9: best compress ratio 60 * There is some nuance here. Refer to QATzip documentation to understand 61 * the mapping of QATzip levels to standard deflate levels. 62 */ 63 #define DEFAULT_MIGRATE_MULTIFD_QATZIP_LEVEL 1 64 65 /* 0: means nocompress, 1: best speed, ... 20: best compress ratio */ 66 #define DEFAULT_MIGRATE_MULTIFD_ZSTD_LEVEL 1 67 68 /* Background transfer rate for postcopy, 0 means unlimited, note 69 * that page requests can still exceed this limit. 70 */ 71 #define DEFAULT_MIGRATE_MAX_POSTCOPY_BANDWIDTH 0 72 73 /* 74 * Parameters for self_announce_delay giving a stream of RARP/ARP 75 * packets after migration. 76 */ 77 #define DEFAULT_MIGRATE_ANNOUNCE_INITIAL 50 78 #define DEFAULT_MIGRATE_ANNOUNCE_MAX 550 79 #define DEFAULT_MIGRATE_ANNOUNCE_ROUNDS 5 80 #define DEFAULT_MIGRATE_ANNOUNCE_STEP 100 81 82 #define DEFINE_PROP_MIG_CAP(name, x) \ 83 DEFINE_PROP_BOOL(name, MigrationState, capabilities[x], false) 84 85 #define DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT_PERIOD 1000 /* milliseconds */ 86 #define DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT 1 /* MB/s */ 87 88 Property migration_properties[] = { 89 DEFINE_PROP_BOOL("store-global-state", MigrationState, 90 store_global_state, true), 91 DEFINE_PROP_BOOL("send-configuration", MigrationState, 92 send_configuration, true), 93 DEFINE_PROP_BOOL("send-section-footer", MigrationState, 94 send_section_footer, true), 95 DEFINE_PROP_BOOL("multifd-flush-after-each-section", MigrationState, 96 multifd_flush_after_each_section, false), 97 DEFINE_PROP_UINT8("x-clear-bitmap-shift", MigrationState, 98 clear_bitmap_shift, CLEAR_BITMAP_SHIFT_DEFAULT), 99 DEFINE_PROP_BOOL("x-preempt-pre-7-2", MigrationState, 100 preempt_pre_7_2, false), 101 102 /* Migration parameters */ 103 DEFINE_PROP_UINT8("x-throttle-trigger-threshold", MigrationState, 104 parameters.throttle_trigger_threshold, 105 DEFAULT_MIGRATE_THROTTLE_TRIGGER_THRESHOLD), 106 DEFINE_PROP_UINT8("x-cpu-throttle-initial", MigrationState, 107 parameters.cpu_throttle_initial, 108 DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL), 109 DEFINE_PROP_UINT8("x-cpu-throttle-increment", MigrationState, 110 parameters.cpu_throttle_increment, 111 DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT), 112 DEFINE_PROP_BOOL("x-cpu-throttle-tailslow", MigrationState, 113 parameters.cpu_throttle_tailslow, false), 114 DEFINE_PROP_SIZE("x-max-bandwidth", MigrationState, 115 parameters.max_bandwidth, MAX_THROTTLE), 116 DEFINE_PROP_SIZE("avail-switchover-bandwidth", MigrationState, 117 parameters.avail_switchover_bandwidth, 0), 118 DEFINE_PROP_UINT64("x-downtime-limit", MigrationState, 119 parameters.downtime_limit, 120 DEFAULT_MIGRATE_SET_DOWNTIME), 121 DEFINE_PROP_UINT32("x-checkpoint-delay", MigrationState, 122 parameters.x_checkpoint_delay, 123 DEFAULT_MIGRATE_X_CHECKPOINT_DELAY), 124 DEFINE_PROP_UINT8("multifd-channels", MigrationState, 125 parameters.multifd_channels, 126 DEFAULT_MIGRATE_MULTIFD_CHANNELS), 127 DEFINE_PROP_MULTIFD_COMPRESSION("multifd-compression", MigrationState, 128 parameters.multifd_compression, 129 DEFAULT_MIGRATE_MULTIFD_COMPRESSION), 130 DEFINE_PROP_UINT8("multifd-zlib-level", MigrationState, 131 parameters.multifd_zlib_level, 132 DEFAULT_MIGRATE_MULTIFD_ZLIB_LEVEL), 133 DEFINE_PROP_UINT8("multifd-qatzip-level", MigrationState, 134 parameters.multifd_qatzip_level, 135 DEFAULT_MIGRATE_MULTIFD_QATZIP_LEVEL), 136 DEFINE_PROP_UINT8("multifd-zstd-level", MigrationState, 137 parameters.multifd_zstd_level, 138 DEFAULT_MIGRATE_MULTIFD_ZSTD_LEVEL), 139 DEFINE_PROP_SIZE("xbzrle-cache-size", MigrationState, 140 parameters.xbzrle_cache_size, 141 DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE), 142 DEFINE_PROP_SIZE("max-postcopy-bandwidth", MigrationState, 143 parameters.max_postcopy_bandwidth, 144 DEFAULT_MIGRATE_MAX_POSTCOPY_BANDWIDTH), 145 DEFINE_PROP_UINT8("max-cpu-throttle", MigrationState, 146 parameters.max_cpu_throttle, 147 DEFAULT_MIGRATE_MAX_CPU_THROTTLE), 148 DEFINE_PROP_SIZE("announce-initial", MigrationState, 149 parameters.announce_initial, 150 DEFAULT_MIGRATE_ANNOUNCE_INITIAL), 151 DEFINE_PROP_SIZE("announce-max", MigrationState, 152 parameters.announce_max, 153 DEFAULT_MIGRATE_ANNOUNCE_MAX), 154 DEFINE_PROP_SIZE("announce-rounds", MigrationState, 155 parameters.announce_rounds, 156 DEFAULT_MIGRATE_ANNOUNCE_ROUNDS), 157 DEFINE_PROP_SIZE("announce-step", MigrationState, 158 parameters.announce_step, 159 DEFAULT_MIGRATE_ANNOUNCE_STEP), 160 DEFINE_PROP_STRING("tls-creds", MigrationState, parameters.tls_creds), 161 DEFINE_PROP_STRING("tls-hostname", MigrationState, parameters.tls_hostname), 162 DEFINE_PROP_STRING("tls-authz", MigrationState, parameters.tls_authz), 163 DEFINE_PROP_UINT64("x-vcpu-dirty-limit-period", MigrationState, 164 parameters.x_vcpu_dirty_limit_period, 165 DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT_PERIOD), 166 DEFINE_PROP_UINT64("vcpu-dirty-limit", MigrationState, 167 parameters.vcpu_dirty_limit, 168 DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT), 169 DEFINE_PROP_MIG_MODE("mode", MigrationState, 170 parameters.mode, 171 MIG_MODE_NORMAL), 172 DEFINE_PROP_ZERO_PAGE_DETECTION("zero-page-detection", MigrationState, 173 parameters.zero_page_detection, 174 ZERO_PAGE_DETECTION_MULTIFD), 175 176 /* Migration capabilities */ 177 DEFINE_PROP_MIG_CAP("x-xbzrle", MIGRATION_CAPABILITY_XBZRLE), 178 DEFINE_PROP_MIG_CAP("x-rdma-pin-all", MIGRATION_CAPABILITY_RDMA_PIN_ALL), 179 DEFINE_PROP_MIG_CAP("x-auto-converge", MIGRATION_CAPABILITY_AUTO_CONVERGE), 180 DEFINE_PROP_MIG_CAP("x-zero-blocks", MIGRATION_CAPABILITY_ZERO_BLOCKS), 181 DEFINE_PROP_MIG_CAP("x-events", MIGRATION_CAPABILITY_EVENTS), 182 DEFINE_PROP_MIG_CAP("x-postcopy-ram", MIGRATION_CAPABILITY_POSTCOPY_RAM), 183 DEFINE_PROP_MIG_CAP("x-postcopy-preempt", 184 MIGRATION_CAPABILITY_POSTCOPY_PREEMPT), 185 DEFINE_PROP_MIG_CAP("x-colo", MIGRATION_CAPABILITY_X_COLO), 186 DEFINE_PROP_MIG_CAP("x-release-ram", MIGRATION_CAPABILITY_RELEASE_RAM), 187 DEFINE_PROP_MIG_CAP("x-return-path", MIGRATION_CAPABILITY_RETURN_PATH), 188 DEFINE_PROP_MIG_CAP("x-multifd", MIGRATION_CAPABILITY_MULTIFD), 189 DEFINE_PROP_MIG_CAP("x-background-snapshot", 190 MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT), 191 #ifdef CONFIG_LINUX 192 DEFINE_PROP_MIG_CAP("x-zero-copy-send", 193 MIGRATION_CAPABILITY_ZERO_COPY_SEND), 194 #endif 195 DEFINE_PROP_MIG_CAP("x-switchover-ack", 196 MIGRATION_CAPABILITY_SWITCHOVER_ACK), 197 DEFINE_PROP_MIG_CAP("x-dirty-limit", MIGRATION_CAPABILITY_DIRTY_LIMIT), 198 DEFINE_PROP_MIG_CAP("mapped-ram", MIGRATION_CAPABILITY_MAPPED_RAM), 199 DEFINE_PROP_END_OF_LIST(), 200 }; 201 202 bool migrate_auto_converge(void) 203 { 204 MigrationState *s = migrate_get_current(); 205 206 return s->capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; 207 } 208 209 bool migrate_background_snapshot(void) 210 { 211 MigrationState *s = migrate_get_current(); 212 213 return s->capabilities[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]; 214 } 215 216 bool migrate_colo(void) 217 { 218 MigrationState *s = migrate_get_current(); 219 220 return s->capabilities[MIGRATION_CAPABILITY_X_COLO]; 221 } 222 223 bool migrate_dirty_bitmaps(void) 224 { 225 MigrationState *s = migrate_get_current(); 226 227 return s->capabilities[MIGRATION_CAPABILITY_DIRTY_BITMAPS]; 228 } 229 230 bool migrate_dirty_limit(void) 231 { 232 MigrationState *s = migrate_get_current(); 233 234 return s->capabilities[MIGRATION_CAPABILITY_DIRTY_LIMIT]; 235 } 236 237 bool migrate_events(void) 238 { 239 MigrationState *s = migrate_get_current(); 240 241 return s->capabilities[MIGRATION_CAPABILITY_EVENTS]; 242 } 243 244 bool migrate_mapped_ram(void) 245 { 246 MigrationState *s = migrate_get_current(); 247 248 return s->capabilities[MIGRATION_CAPABILITY_MAPPED_RAM]; 249 } 250 251 bool migrate_ignore_shared(void) 252 { 253 MigrationState *s = migrate_get_current(); 254 255 return s->capabilities[MIGRATION_CAPABILITY_X_IGNORE_SHARED]; 256 } 257 258 bool migrate_late_block_activate(void) 259 { 260 MigrationState *s = migrate_get_current(); 261 262 return s->capabilities[MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE]; 263 } 264 265 bool migrate_multifd(void) 266 { 267 MigrationState *s = migrate_get_current(); 268 269 return s->capabilities[MIGRATION_CAPABILITY_MULTIFD]; 270 } 271 272 bool migrate_pause_before_switchover(void) 273 { 274 MigrationState *s = migrate_get_current(); 275 276 return s->capabilities[MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER]; 277 } 278 279 bool migrate_postcopy_blocktime(void) 280 { 281 MigrationState *s = migrate_get_current(); 282 283 return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME]; 284 } 285 286 bool migrate_postcopy_preempt(void) 287 { 288 MigrationState *s = migrate_get_current(); 289 290 return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT]; 291 } 292 293 bool migrate_postcopy_ram(void) 294 { 295 MigrationState *s = migrate_get_current(); 296 297 return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM]; 298 } 299 300 bool migrate_rdma_pin_all(void) 301 { 302 MigrationState *s = migrate_get_current(); 303 304 return s->capabilities[MIGRATION_CAPABILITY_RDMA_PIN_ALL]; 305 } 306 307 bool migrate_release_ram(void) 308 { 309 MigrationState *s = migrate_get_current(); 310 311 return s->capabilities[MIGRATION_CAPABILITY_RELEASE_RAM]; 312 } 313 314 bool migrate_return_path(void) 315 { 316 MigrationState *s = migrate_get_current(); 317 318 return s->capabilities[MIGRATION_CAPABILITY_RETURN_PATH]; 319 } 320 321 bool migrate_switchover_ack(void) 322 { 323 MigrationState *s = migrate_get_current(); 324 325 return s->capabilities[MIGRATION_CAPABILITY_SWITCHOVER_ACK]; 326 } 327 328 bool migrate_validate_uuid(void) 329 { 330 MigrationState *s = migrate_get_current(); 331 332 return s->capabilities[MIGRATION_CAPABILITY_VALIDATE_UUID]; 333 } 334 335 bool migrate_xbzrle(void) 336 { 337 MigrationState *s = migrate_get_current(); 338 339 return s->capabilities[MIGRATION_CAPABILITY_XBZRLE]; 340 } 341 342 bool migrate_zero_copy_send(void) 343 { 344 MigrationState *s = migrate_get_current(); 345 346 return s->capabilities[MIGRATION_CAPABILITY_ZERO_COPY_SEND]; 347 } 348 349 /* pseudo capabilities */ 350 351 bool migrate_multifd_flush_after_each_section(void) 352 { 353 MigrationState *s = migrate_get_current(); 354 355 return s->multifd_flush_after_each_section; 356 } 357 358 bool migrate_postcopy(void) 359 { 360 return migrate_postcopy_ram() || migrate_dirty_bitmaps(); 361 } 362 363 bool migrate_rdma(void) 364 { 365 MigrationState *s = migrate_get_current(); 366 367 return s->rdma_migration; 368 } 369 370 bool migrate_tls(void) 371 { 372 MigrationState *s = migrate_get_current(); 373 374 return s->parameters.tls_creds && *s->parameters.tls_creds; 375 } 376 377 typedef enum WriteTrackingSupport { 378 WT_SUPPORT_UNKNOWN = 0, 379 WT_SUPPORT_ABSENT, 380 WT_SUPPORT_AVAILABLE, 381 WT_SUPPORT_COMPATIBLE 382 } WriteTrackingSupport; 383 384 static 385 WriteTrackingSupport migrate_query_write_tracking(void) 386 { 387 /* Check if kernel supports required UFFD features */ 388 if (!ram_write_tracking_available()) { 389 return WT_SUPPORT_ABSENT; 390 } 391 /* 392 * Check if current memory configuration is 393 * compatible with required UFFD features. 394 */ 395 if (!ram_write_tracking_compatible()) { 396 return WT_SUPPORT_AVAILABLE; 397 } 398 399 return WT_SUPPORT_COMPATIBLE; 400 } 401 402 /* Migration capabilities set */ 403 struct MigrateCapsSet { 404 int size; /* Capability set size */ 405 MigrationCapability caps[]; /* Variadic array of capabilities */ 406 }; 407 typedef struct MigrateCapsSet MigrateCapsSet; 408 409 /* Define and initialize MigrateCapsSet */ 410 #define INITIALIZE_MIGRATE_CAPS_SET(_name, ...) \ 411 MigrateCapsSet _name = { \ 412 .size = sizeof((int []) { __VA_ARGS__ }) / sizeof(int), \ 413 .caps = { __VA_ARGS__ } \ 414 } 415 416 /* Background-snapshot compatibility check list */ 417 static const 418 INITIALIZE_MIGRATE_CAPS_SET(check_caps_background_snapshot, 419 MIGRATION_CAPABILITY_POSTCOPY_RAM, 420 MIGRATION_CAPABILITY_DIRTY_BITMAPS, 421 MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME, 422 MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE, 423 MIGRATION_CAPABILITY_RETURN_PATH, 424 MIGRATION_CAPABILITY_MULTIFD, 425 MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER, 426 MIGRATION_CAPABILITY_AUTO_CONVERGE, 427 MIGRATION_CAPABILITY_RELEASE_RAM, 428 MIGRATION_CAPABILITY_RDMA_PIN_ALL, 429 MIGRATION_CAPABILITY_XBZRLE, 430 MIGRATION_CAPABILITY_X_COLO, 431 MIGRATION_CAPABILITY_VALIDATE_UUID, 432 MIGRATION_CAPABILITY_ZERO_COPY_SEND); 433 434 static bool migrate_incoming_started(void) 435 { 436 return !!migration_incoming_get_current()->transport_data; 437 } 438 439 /** 440 * @migration_caps_check - check capability compatibility 441 * 442 * @old_caps: old capability list 443 * @new_caps: new capability list 444 * @errp: set *errp if the check failed, with reason 445 * 446 * Returns true if check passed, otherwise false. 447 */ 448 bool migrate_caps_check(bool *old_caps, bool *new_caps, Error **errp) 449 { 450 ERRP_GUARD(); 451 MigrationIncomingState *mis = migration_incoming_get_current(); 452 453 if (new_caps[MIGRATION_CAPABILITY_ZERO_BLOCKS]) { 454 warn_report("zero-blocks capability is deprecated"); 455 } 456 457 #ifndef CONFIG_REPLICATION 458 if (new_caps[MIGRATION_CAPABILITY_X_COLO]) { 459 error_setg(errp, "QEMU compiled without replication module" 460 " can't enable COLO"); 461 error_append_hint(errp, "Please enable replication before COLO.\n"); 462 return false; 463 } 464 #endif 465 466 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 467 /* This check is reasonably expensive, so only when it's being 468 * set the first time, also it's only the destination that needs 469 * special support. 470 */ 471 if (!old_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM] && 472 runstate_check(RUN_STATE_INMIGRATE) && 473 !postcopy_ram_supported_by_host(mis, errp)) { 474 error_prepend(errp, "Postcopy is not supported: "); 475 return false; 476 } 477 478 if (new_caps[MIGRATION_CAPABILITY_X_IGNORE_SHARED]) { 479 error_setg(errp, "Postcopy is not compatible with ignore-shared"); 480 return false; 481 } 482 483 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 484 error_setg(errp, "Postcopy is not yet compatible with multifd"); 485 return false; 486 } 487 } 488 489 if (new_caps[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]) { 490 WriteTrackingSupport wt_support; 491 int idx; 492 /* 493 * Check if 'background-snapshot' capability is supported by 494 * host kernel and compatible with guest memory configuration. 495 */ 496 wt_support = migrate_query_write_tracking(); 497 if (wt_support < WT_SUPPORT_AVAILABLE) { 498 error_setg(errp, "Background-snapshot is not supported by host kernel"); 499 return false; 500 } 501 if (wt_support < WT_SUPPORT_COMPATIBLE) { 502 error_setg(errp, "Background-snapshot is not compatible " 503 "with guest memory configuration"); 504 return false; 505 } 506 507 /* 508 * Check if there are any migration capabilities 509 * incompatible with 'background-snapshot'. 510 */ 511 for (idx = 0; idx < check_caps_background_snapshot.size; idx++) { 512 int incomp_cap = check_caps_background_snapshot.caps[idx]; 513 if (new_caps[incomp_cap]) { 514 error_setg(errp, 515 "Background-snapshot is not compatible with %s", 516 MigrationCapability_str(incomp_cap)); 517 return false; 518 } 519 } 520 } 521 522 #ifdef CONFIG_LINUX 523 if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND] && 524 (!new_caps[MIGRATION_CAPABILITY_MULTIFD] || 525 new_caps[MIGRATION_CAPABILITY_XBZRLE] || 526 migrate_multifd_compression() || 527 migrate_tls())) { 528 error_setg(errp, 529 "Zero copy only available for non-compressed non-TLS multifd migration"); 530 return false; 531 } 532 #else 533 if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND]) { 534 error_setg(errp, 535 "Zero copy currently only available on Linux"); 536 return false; 537 } 538 #endif 539 540 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT]) { 541 if (!new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 542 error_setg(errp, "Postcopy preempt requires postcopy-ram"); 543 return false; 544 } 545 546 if (migrate_incoming_started()) { 547 error_setg(errp, 548 "Postcopy preempt must be set before incoming starts"); 549 return false; 550 } 551 } 552 553 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 554 if (migrate_incoming_started()) { 555 error_setg(errp, "Multifd must be set before incoming starts"); 556 return false; 557 } 558 } 559 560 if (new_caps[MIGRATION_CAPABILITY_SWITCHOVER_ACK]) { 561 if (!new_caps[MIGRATION_CAPABILITY_RETURN_PATH]) { 562 error_setg(errp, "Capability 'switchover-ack' requires capability " 563 "'return-path'"); 564 return false; 565 } 566 } 567 if (new_caps[MIGRATION_CAPABILITY_DIRTY_LIMIT]) { 568 if (new_caps[MIGRATION_CAPABILITY_AUTO_CONVERGE]) { 569 error_setg(errp, "dirty-limit conflicts with auto-converge" 570 " either of then available currently"); 571 return false; 572 } 573 574 if (!kvm_enabled() || !kvm_dirty_ring_enabled()) { 575 error_setg(errp, "dirty-limit requires KVM with accelerator" 576 " property 'dirty-ring-size' set"); 577 return false; 578 } 579 } 580 581 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 582 if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) { 583 error_setg(errp, "Multifd is not compatible with xbzrle"); 584 return false; 585 } 586 } 587 588 if (new_caps[MIGRATION_CAPABILITY_MAPPED_RAM]) { 589 if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) { 590 error_setg(errp, 591 "Mapped-ram migration is incompatible with xbzrle"); 592 return false; 593 } 594 595 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 596 error_setg(errp, 597 "Mapped-ram migration is incompatible with postcopy"); 598 return false; 599 } 600 } 601 602 return true; 603 } 604 605 MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) 606 { 607 MigrationCapabilityStatusList *head = NULL, **tail = &head; 608 MigrationCapabilityStatus *caps; 609 MigrationState *s = migrate_get_current(); 610 int i; 611 612 for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { 613 caps = g_malloc0(sizeof(*caps)); 614 caps->capability = i; 615 caps->state = s->capabilities[i]; 616 QAPI_LIST_APPEND(tail, caps); 617 } 618 619 return head; 620 } 621 622 void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, 623 Error **errp) 624 { 625 MigrationState *s = migrate_get_current(); 626 MigrationCapabilityStatusList *cap; 627 bool new_caps[MIGRATION_CAPABILITY__MAX]; 628 629 if (migration_is_running() || migration_in_colo_state()) { 630 error_setg(errp, "There's a migration process in progress"); 631 return; 632 } 633 634 memcpy(new_caps, s->capabilities, sizeof(new_caps)); 635 for (cap = params; cap; cap = cap->next) { 636 new_caps[cap->value->capability] = cap->value->state; 637 } 638 639 if (!migrate_caps_check(s->capabilities, new_caps, errp)) { 640 return; 641 } 642 643 for (cap = params; cap; cap = cap->next) { 644 s->capabilities[cap->value->capability] = cap->value->state; 645 } 646 } 647 648 /* parameters */ 649 650 const BitmapMigrationNodeAliasList *migrate_block_bitmap_mapping(void) 651 { 652 MigrationState *s = migrate_get_current(); 653 654 return s->parameters.block_bitmap_mapping; 655 } 656 657 bool migrate_has_block_bitmap_mapping(void) 658 { 659 MigrationState *s = migrate_get_current(); 660 661 return s->parameters.has_block_bitmap_mapping; 662 } 663 664 uint32_t migrate_checkpoint_delay(void) 665 { 666 MigrationState *s = migrate_get_current(); 667 668 return s->parameters.x_checkpoint_delay; 669 } 670 671 uint8_t migrate_cpu_throttle_increment(void) 672 { 673 MigrationState *s = migrate_get_current(); 674 675 return s->parameters.cpu_throttle_increment; 676 } 677 678 uint8_t migrate_cpu_throttle_initial(void) 679 { 680 MigrationState *s = migrate_get_current(); 681 682 return s->parameters.cpu_throttle_initial; 683 } 684 685 bool migrate_cpu_throttle_tailslow(void) 686 { 687 MigrationState *s = migrate_get_current(); 688 689 return s->parameters.cpu_throttle_tailslow; 690 } 691 692 bool migrate_direct_io(void) 693 { 694 MigrationState *s = migrate_get_current(); 695 696 /* 697 * O_DIRECT is only supported with mapped-ram and multifd. 698 * 699 * mapped-ram is needed because filesystems impose restrictions on 700 * O_DIRECT IO alignment (see MAPPED_RAM_FILE_OFFSET_ALIGNMENT). 701 * 702 * multifd is needed to keep the unaligned portion of the stream 703 * isolated to the main migration thread while multifd channels 704 * process the aligned data with O_DIRECT enabled. 705 */ 706 return s->parameters.direct_io && 707 s->capabilities[MIGRATION_CAPABILITY_MAPPED_RAM] && 708 s->capabilities[MIGRATION_CAPABILITY_MULTIFD]; 709 } 710 711 uint64_t migrate_downtime_limit(void) 712 { 713 MigrationState *s = migrate_get_current(); 714 715 return s->parameters.downtime_limit; 716 } 717 718 uint8_t migrate_max_cpu_throttle(void) 719 { 720 MigrationState *s = migrate_get_current(); 721 722 return s->parameters.max_cpu_throttle; 723 } 724 725 uint64_t migrate_max_bandwidth(void) 726 { 727 MigrationState *s = migrate_get_current(); 728 729 return s->parameters.max_bandwidth; 730 } 731 732 uint64_t migrate_avail_switchover_bandwidth(void) 733 { 734 MigrationState *s = migrate_get_current(); 735 736 return s->parameters.avail_switchover_bandwidth; 737 } 738 739 uint64_t migrate_max_postcopy_bandwidth(void) 740 { 741 MigrationState *s = migrate_get_current(); 742 743 return s->parameters.max_postcopy_bandwidth; 744 } 745 746 MigMode migrate_mode(void) 747 { 748 MigrationState *s = migrate_get_current(); 749 MigMode mode = s->parameters.mode; 750 751 assert(mode >= 0 && mode < MIG_MODE__MAX); 752 return mode; 753 } 754 755 int migrate_multifd_channels(void) 756 { 757 MigrationState *s = migrate_get_current(); 758 759 return s->parameters.multifd_channels; 760 } 761 762 MultiFDCompression migrate_multifd_compression(void) 763 { 764 MigrationState *s = migrate_get_current(); 765 766 assert(s->parameters.multifd_compression < MULTIFD_COMPRESSION__MAX); 767 return s->parameters.multifd_compression; 768 } 769 770 int migrate_multifd_zlib_level(void) 771 { 772 MigrationState *s = migrate_get_current(); 773 774 return s->parameters.multifd_zlib_level; 775 } 776 777 int migrate_multifd_qatzip_level(void) 778 { 779 MigrationState *s = migrate_get_current(); 780 781 return s->parameters.multifd_qatzip_level; 782 } 783 784 int migrate_multifd_zstd_level(void) 785 { 786 MigrationState *s = migrate_get_current(); 787 788 return s->parameters.multifd_zstd_level; 789 } 790 791 uint8_t migrate_throttle_trigger_threshold(void) 792 { 793 MigrationState *s = migrate_get_current(); 794 795 return s->parameters.throttle_trigger_threshold; 796 } 797 798 const char *migrate_tls_authz(void) 799 { 800 MigrationState *s = migrate_get_current(); 801 802 return s->parameters.tls_authz; 803 } 804 805 const char *migrate_tls_creds(void) 806 { 807 MigrationState *s = migrate_get_current(); 808 809 return s->parameters.tls_creds; 810 } 811 812 const char *migrate_tls_hostname(void) 813 { 814 MigrationState *s = migrate_get_current(); 815 816 return s->parameters.tls_hostname; 817 } 818 819 uint64_t migrate_vcpu_dirty_limit_period(void) 820 { 821 MigrationState *s = migrate_get_current(); 822 823 return s->parameters.x_vcpu_dirty_limit_period; 824 } 825 826 uint64_t migrate_xbzrle_cache_size(void) 827 { 828 MigrationState *s = migrate_get_current(); 829 830 return s->parameters.xbzrle_cache_size; 831 } 832 833 ZeroPageDetection migrate_zero_page_detection(void) 834 { 835 MigrationState *s = migrate_get_current(); 836 837 return s->parameters.zero_page_detection; 838 } 839 840 /* parameters helpers */ 841 842 AnnounceParameters *migrate_announce_params(void) 843 { 844 static AnnounceParameters ap; 845 846 MigrationState *s = migrate_get_current(); 847 848 ap.initial = s->parameters.announce_initial; 849 ap.max = s->parameters.announce_max; 850 ap.rounds = s->parameters.announce_rounds; 851 ap.step = s->parameters.announce_step; 852 853 return ≈ 854 } 855 856 MigrationParameters *qmp_query_migrate_parameters(Error **errp) 857 { 858 MigrationParameters *params; 859 MigrationState *s = migrate_get_current(); 860 861 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 862 params = g_malloc0(sizeof(*params)); 863 params->has_throttle_trigger_threshold = true; 864 params->throttle_trigger_threshold = s->parameters.throttle_trigger_threshold; 865 params->has_cpu_throttle_initial = true; 866 params->cpu_throttle_initial = s->parameters.cpu_throttle_initial; 867 params->has_cpu_throttle_increment = true; 868 params->cpu_throttle_increment = s->parameters.cpu_throttle_increment; 869 params->has_cpu_throttle_tailslow = true; 870 params->cpu_throttle_tailslow = s->parameters.cpu_throttle_tailslow; 871 params->tls_creds = g_strdup(s->parameters.tls_creds); 872 params->tls_hostname = g_strdup(s->parameters.tls_hostname); 873 params->tls_authz = g_strdup(s->parameters.tls_authz ? 874 s->parameters.tls_authz : ""); 875 params->has_max_bandwidth = true; 876 params->max_bandwidth = s->parameters.max_bandwidth; 877 params->has_avail_switchover_bandwidth = true; 878 params->avail_switchover_bandwidth = s->parameters.avail_switchover_bandwidth; 879 params->has_downtime_limit = true; 880 params->downtime_limit = s->parameters.downtime_limit; 881 params->has_x_checkpoint_delay = true; 882 params->x_checkpoint_delay = s->parameters.x_checkpoint_delay; 883 params->has_multifd_channels = true; 884 params->multifd_channels = s->parameters.multifd_channels; 885 params->has_multifd_compression = true; 886 params->multifd_compression = s->parameters.multifd_compression; 887 params->has_multifd_zlib_level = true; 888 params->multifd_zlib_level = s->parameters.multifd_zlib_level; 889 params->has_multifd_qatzip_level = true; 890 params->multifd_qatzip_level = s->parameters.multifd_qatzip_level; 891 params->has_multifd_zstd_level = true; 892 params->multifd_zstd_level = s->parameters.multifd_zstd_level; 893 params->has_xbzrle_cache_size = true; 894 params->xbzrle_cache_size = s->parameters.xbzrle_cache_size; 895 params->has_max_postcopy_bandwidth = true; 896 params->max_postcopy_bandwidth = s->parameters.max_postcopy_bandwidth; 897 params->has_max_cpu_throttle = true; 898 params->max_cpu_throttle = s->parameters.max_cpu_throttle; 899 params->has_announce_initial = true; 900 params->announce_initial = s->parameters.announce_initial; 901 params->has_announce_max = true; 902 params->announce_max = s->parameters.announce_max; 903 params->has_announce_rounds = true; 904 params->announce_rounds = s->parameters.announce_rounds; 905 params->has_announce_step = true; 906 params->announce_step = s->parameters.announce_step; 907 908 if (s->parameters.has_block_bitmap_mapping) { 909 params->has_block_bitmap_mapping = true; 910 params->block_bitmap_mapping = 911 QAPI_CLONE(BitmapMigrationNodeAliasList, 912 s->parameters.block_bitmap_mapping); 913 } 914 915 params->has_x_vcpu_dirty_limit_period = true; 916 params->x_vcpu_dirty_limit_period = s->parameters.x_vcpu_dirty_limit_period; 917 params->has_vcpu_dirty_limit = true; 918 params->vcpu_dirty_limit = s->parameters.vcpu_dirty_limit; 919 params->has_mode = true; 920 params->mode = s->parameters.mode; 921 params->has_zero_page_detection = true; 922 params->zero_page_detection = s->parameters.zero_page_detection; 923 params->has_direct_io = true; 924 params->direct_io = s->parameters.direct_io; 925 926 return params; 927 } 928 929 void migrate_params_init(MigrationParameters *params) 930 { 931 params->tls_hostname = g_strdup(""); 932 params->tls_creds = g_strdup(""); 933 934 /* Set has_* up only for parameter checks */ 935 params->has_throttle_trigger_threshold = true; 936 params->has_cpu_throttle_initial = true; 937 params->has_cpu_throttle_increment = true; 938 params->has_cpu_throttle_tailslow = true; 939 params->has_max_bandwidth = true; 940 params->has_downtime_limit = true; 941 params->has_x_checkpoint_delay = true; 942 params->has_multifd_channels = true; 943 params->has_multifd_compression = true; 944 params->has_multifd_zlib_level = true; 945 params->has_multifd_qatzip_level = true; 946 params->has_multifd_zstd_level = true; 947 params->has_xbzrle_cache_size = true; 948 params->has_max_postcopy_bandwidth = true; 949 params->has_max_cpu_throttle = true; 950 params->has_announce_initial = true; 951 params->has_announce_max = true; 952 params->has_announce_rounds = true; 953 params->has_announce_step = true; 954 params->has_x_vcpu_dirty_limit_period = true; 955 params->has_vcpu_dirty_limit = true; 956 params->has_mode = true; 957 params->has_zero_page_detection = true; 958 params->has_direct_io = true; 959 } 960 961 /* 962 * Check whether the parameters are valid. Error will be put into errp 963 * (if provided). Return true if valid, otherwise false. 964 */ 965 bool migrate_params_check(MigrationParameters *params, Error **errp) 966 { 967 ERRP_GUARD(); 968 969 if (params->has_throttle_trigger_threshold && 970 (params->throttle_trigger_threshold < 1 || 971 params->throttle_trigger_threshold > 100)) { 972 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 973 "throttle_trigger_threshold", 974 "an integer in the range of 1 to 100"); 975 return false; 976 } 977 978 if (params->has_cpu_throttle_initial && 979 (params->cpu_throttle_initial < 1 || 980 params->cpu_throttle_initial > 99)) { 981 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 982 "cpu_throttle_initial", 983 "an integer in the range of 1 to 99"); 984 return false; 985 } 986 987 if (params->has_cpu_throttle_increment && 988 (params->cpu_throttle_increment < 1 || 989 params->cpu_throttle_increment > 99)) { 990 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 991 "cpu_throttle_increment", 992 "an integer in the range of 1 to 99"); 993 return false; 994 } 995 996 if (params->has_max_bandwidth && (params->max_bandwidth > SIZE_MAX)) { 997 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 998 "max_bandwidth", 999 "an integer in the range of 0 to "stringify(SIZE_MAX) 1000 " bytes/second"); 1001 return false; 1002 } 1003 1004 if (params->has_avail_switchover_bandwidth && 1005 (params->avail_switchover_bandwidth > SIZE_MAX)) { 1006 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1007 "avail_switchover_bandwidth", 1008 "an integer in the range of 0 to "stringify(SIZE_MAX) 1009 " bytes/second"); 1010 return false; 1011 } 1012 1013 if (params->has_downtime_limit && 1014 (params->downtime_limit > MAX_MIGRATE_DOWNTIME)) { 1015 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1016 "downtime_limit", 1017 "an integer in the range of 0 to " 1018 stringify(MAX_MIGRATE_DOWNTIME)" ms"); 1019 return false; 1020 } 1021 1022 /* x_checkpoint_delay is now always positive */ 1023 1024 if (params->has_multifd_channels && (params->multifd_channels < 1)) { 1025 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1026 "multifd_channels", 1027 "a value between 1 and 255"); 1028 return false; 1029 } 1030 1031 if (params->has_multifd_zlib_level && 1032 (params->multifd_zlib_level > 9)) { 1033 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zlib_level", 1034 "a value between 0 and 9"); 1035 return false; 1036 } 1037 1038 if (params->has_multifd_qatzip_level && 1039 ((params->multifd_qatzip_level > 9) || 1040 (params->multifd_qatzip_level < 1))) { 1041 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_qatzip_level", 1042 "a value between 1 and 9"); 1043 return false; 1044 } 1045 1046 if (params->has_multifd_zstd_level && 1047 (params->multifd_zstd_level > 20)) { 1048 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zstd_level", 1049 "a value between 0 and 20"); 1050 return false; 1051 } 1052 1053 if (params->has_xbzrle_cache_size && 1054 (params->xbzrle_cache_size < qemu_target_page_size() || 1055 !is_power_of_2(params->xbzrle_cache_size))) { 1056 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1057 "xbzrle_cache_size", 1058 "a power of two no less than the target page size"); 1059 return false; 1060 } 1061 1062 if (params->has_max_cpu_throttle && 1063 (params->max_cpu_throttle < params->cpu_throttle_initial || 1064 params->max_cpu_throttle > 99)) { 1065 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1066 "max_cpu_throttle", 1067 "an integer in the range of cpu_throttle_initial to 99"); 1068 return false; 1069 } 1070 1071 if (params->has_announce_initial && 1072 params->announce_initial > 100000) { 1073 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1074 "announce_initial", 1075 "a value between 0 and 100000"); 1076 return false; 1077 } 1078 if (params->has_announce_max && 1079 params->announce_max > 100000) { 1080 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1081 "announce_max", 1082 "a value between 0 and 100000"); 1083 return false; 1084 } 1085 if (params->has_announce_rounds && 1086 params->announce_rounds > 1000) { 1087 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1088 "announce_rounds", 1089 "a value between 0 and 1000"); 1090 return false; 1091 } 1092 if (params->has_announce_step && 1093 (params->announce_step < 1 || 1094 params->announce_step > 10000)) { 1095 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1096 "announce_step", 1097 "a value between 0 and 10000"); 1098 return false; 1099 } 1100 1101 if (params->has_block_bitmap_mapping && 1102 !check_dirty_bitmap_mig_alias_map(params->block_bitmap_mapping, errp)) { 1103 error_prepend(errp, "Invalid mapping given for block-bitmap-mapping: "); 1104 return false; 1105 } 1106 1107 #ifdef CONFIG_LINUX 1108 if (migrate_zero_copy_send() && 1109 ((params->has_multifd_compression && params->multifd_compression) || 1110 (params->tls_creds && *params->tls_creds))) { 1111 error_setg(errp, 1112 "Zero copy only available for non-compressed non-TLS multifd migration"); 1113 return false; 1114 } 1115 #endif 1116 1117 if (migrate_mapped_ram() && 1118 (migrate_multifd_compression() || migrate_tls())) { 1119 error_setg(errp, 1120 "Mapped-ram only available for non-compressed non-TLS multifd migration"); 1121 return false; 1122 } 1123 1124 if (params->has_x_vcpu_dirty_limit_period && 1125 (params->x_vcpu_dirty_limit_period < 1 || 1126 params->x_vcpu_dirty_limit_period > 1000)) { 1127 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1128 "x-vcpu-dirty-limit-period", 1129 "a value between 1 and 1000"); 1130 return false; 1131 } 1132 1133 if (params->has_vcpu_dirty_limit && 1134 (params->vcpu_dirty_limit < 1)) { 1135 error_setg(errp, 1136 "Parameter 'vcpu_dirty_limit' must be greater than 1 MB/s"); 1137 return false; 1138 } 1139 1140 if (params->has_direct_io && params->direct_io && !qemu_has_direct_io()) { 1141 error_setg(errp, "No build-time support for direct-io"); 1142 return false; 1143 } 1144 1145 return true; 1146 } 1147 1148 static void migrate_params_test_apply(MigrateSetParameters *params, 1149 MigrationParameters *dest) 1150 { 1151 *dest = migrate_get_current()->parameters; 1152 1153 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 1154 1155 if (params->has_throttle_trigger_threshold) { 1156 dest->throttle_trigger_threshold = params->throttle_trigger_threshold; 1157 } 1158 1159 if (params->has_cpu_throttle_initial) { 1160 dest->cpu_throttle_initial = params->cpu_throttle_initial; 1161 } 1162 1163 if (params->has_cpu_throttle_increment) { 1164 dest->cpu_throttle_increment = params->cpu_throttle_increment; 1165 } 1166 1167 if (params->has_cpu_throttle_tailslow) { 1168 dest->cpu_throttle_tailslow = params->cpu_throttle_tailslow; 1169 } 1170 1171 if (params->tls_creds) { 1172 assert(params->tls_creds->type == QTYPE_QSTRING); 1173 dest->tls_creds = params->tls_creds->u.s; 1174 } 1175 1176 if (params->tls_hostname) { 1177 assert(params->tls_hostname->type == QTYPE_QSTRING); 1178 dest->tls_hostname = params->tls_hostname->u.s; 1179 } 1180 1181 if (params->has_max_bandwidth) { 1182 dest->max_bandwidth = params->max_bandwidth; 1183 } 1184 1185 if (params->has_avail_switchover_bandwidth) { 1186 dest->avail_switchover_bandwidth = params->avail_switchover_bandwidth; 1187 } 1188 1189 if (params->has_downtime_limit) { 1190 dest->downtime_limit = params->downtime_limit; 1191 } 1192 1193 if (params->has_x_checkpoint_delay) { 1194 dest->x_checkpoint_delay = params->x_checkpoint_delay; 1195 } 1196 1197 if (params->has_multifd_channels) { 1198 dest->multifd_channels = params->multifd_channels; 1199 } 1200 if (params->has_multifd_compression) { 1201 dest->multifd_compression = params->multifd_compression; 1202 } 1203 if (params->has_multifd_qatzip_level) { 1204 dest->multifd_qatzip_level = params->multifd_qatzip_level; 1205 } 1206 if (params->has_multifd_zlib_level) { 1207 dest->multifd_zlib_level = params->multifd_zlib_level; 1208 } 1209 if (params->has_multifd_zstd_level) { 1210 dest->multifd_zstd_level = params->multifd_zstd_level; 1211 } 1212 if (params->has_xbzrle_cache_size) { 1213 dest->xbzrle_cache_size = params->xbzrle_cache_size; 1214 } 1215 if (params->has_max_postcopy_bandwidth) { 1216 dest->max_postcopy_bandwidth = params->max_postcopy_bandwidth; 1217 } 1218 if (params->has_max_cpu_throttle) { 1219 dest->max_cpu_throttle = params->max_cpu_throttle; 1220 } 1221 if (params->has_announce_initial) { 1222 dest->announce_initial = params->announce_initial; 1223 } 1224 if (params->has_announce_max) { 1225 dest->announce_max = params->announce_max; 1226 } 1227 if (params->has_announce_rounds) { 1228 dest->announce_rounds = params->announce_rounds; 1229 } 1230 if (params->has_announce_step) { 1231 dest->announce_step = params->announce_step; 1232 } 1233 1234 if (params->has_block_bitmap_mapping) { 1235 dest->has_block_bitmap_mapping = true; 1236 dest->block_bitmap_mapping = params->block_bitmap_mapping; 1237 } 1238 1239 if (params->has_x_vcpu_dirty_limit_period) { 1240 dest->x_vcpu_dirty_limit_period = 1241 params->x_vcpu_dirty_limit_period; 1242 } 1243 if (params->has_vcpu_dirty_limit) { 1244 dest->vcpu_dirty_limit = params->vcpu_dirty_limit; 1245 } 1246 1247 if (params->has_mode) { 1248 dest->mode = params->mode; 1249 } 1250 1251 if (params->has_zero_page_detection) { 1252 dest->zero_page_detection = params->zero_page_detection; 1253 } 1254 1255 if (params->has_direct_io) { 1256 dest->direct_io = params->direct_io; 1257 } 1258 } 1259 1260 static void migrate_params_apply(MigrateSetParameters *params, Error **errp) 1261 { 1262 MigrationState *s = migrate_get_current(); 1263 1264 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 1265 1266 if (params->has_throttle_trigger_threshold) { 1267 s->parameters.throttle_trigger_threshold = params->throttle_trigger_threshold; 1268 } 1269 1270 if (params->has_cpu_throttle_initial) { 1271 s->parameters.cpu_throttle_initial = params->cpu_throttle_initial; 1272 } 1273 1274 if (params->has_cpu_throttle_increment) { 1275 s->parameters.cpu_throttle_increment = params->cpu_throttle_increment; 1276 } 1277 1278 if (params->has_cpu_throttle_tailslow) { 1279 s->parameters.cpu_throttle_tailslow = params->cpu_throttle_tailslow; 1280 } 1281 1282 if (params->tls_creds) { 1283 g_free(s->parameters.tls_creds); 1284 assert(params->tls_creds->type == QTYPE_QSTRING); 1285 s->parameters.tls_creds = g_strdup(params->tls_creds->u.s); 1286 } 1287 1288 if (params->tls_hostname) { 1289 g_free(s->parameters.tls_hostname); 1290 assert(params->tls_hostname->type == QTYPE_QSTRING); 1291 s->parameters.tls_hostname = g_strdup(params->tls_hostname->u.s); 1292 } 1293 1294 if (params->tls_authz) { 1295 g_free(s->parameters.tls_authz); 1296 assert(params->tls_authz->type == QTYPE_QSTRING); 1297 s->parameters.tls_authz = g_strdup(params->tls_authz->u.s); 1298 } 1299 1300 if (params->has_max_bandwidth) { 1301 s->parameters.max_bandwidth = params->max_bandwidth; 1302 if (s->to_dst_file && !migration_in_postcopy()) { 1303 migration_rate_set(s->parameters.max_bandwidth); 1304 } 1305 } 1306 1307 if (params->has_avail_switchover_bandwidth) { 1308 s->parameters.avail_switchover_bandwidth = params->avail_switchover_bandwidth; 1309 } 1310 1311 if (params->has_downtime_limit) { 1312 s->parameters.downtime_limit = params->downtime_limit; 1313 } 1314 1315 if (params->has_x_checkpoint_delay) { 1316 s->parameters.x_checkpoint_delay = params->x_checkpoint_delay; 1317 colo_checkpoint_delay_set(); 1318 } 1319 1320 if (params->has_multifd_channels) { 1321 s->parameters.multifd_channels = params->multifd_channels; 1322 } 1323 if (params->has_multifd_compression) { 1324 s->parameters.multifd_compression = params->multifd_compression; 1325 } 1326 if (params->has_multifd_qatzip_level) { 1327 s->parameters.multifd_qatzip_level = params->multifd_qatzip_level; 1328 } 1329 if (params->has_multifd_zlib_level) { 1330 s->parameters.multifd_zlib_level = params->multifd_zlib_level; 1331 } 1332 if (params->has_multifd_zstd_level) { 1333 s->parameters.multifd_zstd_level = params->multifd_zstd_level; 1334 } 1335 if (params->has_xbzrle_cache_size) { 1336 s->parameters.xbzrle_cache_size = params->xbzrle_cache_size; 1337 xbzrle_cache_resize(params->xbzrle_cache_size, errp); 1338 } 1339 if (params->has_max_postcopy_bandwidth) { 1340 s->parameters.max_postcopy_bandwidth = params->max_postcopy_bandwidth; 1341 if (s->to_dst_file && migration_in_postcopy()) { 1342 migration_rate_set(s->parameters.max_postcopy_bandwidth); 1343 } 1344 } 1345 if (params->has_max_cpu_throttle) { 1346 s->parameters.max_cpu_throttle = params->max_cpu_throttle; 1347 } 1348 if (params->has_announce_initial) { 1349 s->parameters.announce_initial = params->announce_initial; 1350 } 1351 if (params->has_announce_max) { 1352 s->parameters.announce_max = params->announce_max; 1353 } 1354 if (params->has_announce_rounds) { 1355 s->parameters.announce_rounds = params->announce_rounds; 1356 } 1357 if (params->has_announce_step) { 1358 s->parameters.announce_step = params->announce_step; 1359 } 1360 1361 if (params->has_block_bitmap_mapping) { 1362 qapi_free_BitmapMigrationNodeAliasList( 1363 s->parameters.block_bitmap_mapping); 1364 1365 s->parameters.has_block_bitmap_mapping = true; 1366 s->parameters.block_bitmap_mapping = 1367 QAPI_CLONE(BitmapMigrationNodeAliasList, 1368 params->block_bitmap_mapping); 1369 } 1370 1371 if (params->has_x_vcpu_dirty_limit_period) { 1372 s->parameters.x_vcpu_dirty_limit_period = 1373 params->x_vcpu_dirty_limit_period; 1374 } 1375 if (params->has_vcpu_dirty_limit) { 1376 s->parameters.vcpu_dirty_limit = params->vcpu_dirty_limit; 1377 } 1378 1379 if (params->has_mode) { 1380 s->parameters.mode = params->mode; 1381 } 1382 1383 if (params->has_zero_page_detection) { 1384 s->parameters.zero_page_detection = params->zero_page_detection; 1385 } 1386 1387 if (params->has_direct_io) { 1388 s->parameters.direct_io = params->direct_io; 1389 } 1390 } 1391 1392 void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp) 1393 { 1394 MigrationParameters tmp; 1395 1396 /* TODO Rewrite "" to null instead for all three tls_* parameters */ 1397 if (params->tls_creds 1398 && params->tls_creds->type == QTYPE_QNULL) { 1399 qobject_unref(params->tls_creds->u.n); 1400 params->tls_creds->type = QTYPE_QSTRING; 1401 params->tls_creds->u.s = strdup(""); 1402 } 1403 if (params->tls_hostname 1404 && params->tls_hostname->type == QTYPE_QNULL) { 1405 qobject_unref(params->tls_hostname->u.n); 1406 params->tls_hostname->type = QTYPE_QSTRING; 1407 params->tls_hostname->u.s = strdup(""); 1408 } 1409 if (params->tls_authz 1410 && params->tls_authz->type == QTYPE_QNULL) { 1411 qobject_unref(params->tls_authz->u.n); 1412 params->tls_authz->type = QTYPE_QSTRING; 1413 params->tls_authz->u.s = strdup(""); 1414 } 1415 1416 migrate_params_test_apply(params, &tmp); 1417 1418 if (!migrate_params_check(&tmp, errp)) { 1419 /* Invalid parameter */ 1420 return; 1421 } 1422 1423 migrate_params_apply(params, errp); 1424 } 1425