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 "qobject/qnull.h" 23 #include "system/runstate.h" 24 #include "migration/colo.h" 25 #include "migration/cpr.h" 26 #include "migration/misc.h" 27 #include "migration.h" 28 #include "migration-stats.h" 29 #include "qemu-file.h" 30 #include "ram.h" 31 #include "options.h" 32 #include "system/kvm.h" 33 34 /* Maximum migrate downtime set to 2000 seconds */ 35 #define MAX_MIGRATE_DOWNTIME_SECONDS 2000 36 #define MAX_MIGRATE_DOWNTIME (MAX_MIGRATE_DOWNTIME_SECONDS * 1000) 37 38 #define MAX_THROTTLE (128 << 20) /* Migration transfer speed throttling */ 39 40 /* Time in milliseconds we are allowed to stop the source, 41 * for sending the last part */ 42 #define DEFAULT_MIGRATE_SET_DOWNTIME 300 43 44 /* Define default autoconverge cpu throttle migration parameters */ 45 #define DEFAULT_MIGRATE_THROTTLE_TRIGGER_THRESHOLD 50 46 #define DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL 20 47 #define DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT 10 48 #define DEFAULT_MIGRATE_MAX_CPU_THROTTLE 99 49 50 /* Migration XBZRLE default cache size */ 51 #define DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE (64 * 1024 * 1024) 52 53 /* The delay time (in ms) between two COLO checkpoints */ 54 #define DEFAULT_MIGRATE_X_CHECKPOINT_DELAY (200 * 100) 55 #define DEFAULT_MIGRATE_MULTIFD_CHANNELS 2 56 #define DEFAULT_MIGRATE_MULTIFD_COMPRESSION MULTIFD_COMPRESSION_NONE 57 /* 0: means nocompress, 1: best speed, ... 9: best compress ratio */ 58 #define DEFAULT_MIGRATE_MULTIFD_ZLIB_LEVEL 1 59 /* 60 * 1: best speed, ... 9: best compress ratio 61 * There is some nuance here. Refer to QATzip documentation to understand 62 * the mapping of QATzip levels to standard deflate levels. 63 */ 64 #define DEFAULT_MIGRATE_MULTIFD_QATZIP_LEVEL 1 65 66 /* 0: means nocompress, 1: best speed, ... 20: best compress ratio */ 67 #define DEFAULT_MIGRATE_MULTIFD_ZSTD_LEVEL 1 68 69 /* Background transfer rate for postcopy, 0 means unlimited, note 70 * that page requests can still exceed this limit. 71 */ 72 #define DEFAULT_MIGRATE_MAX_POSTCOPY_BANDWIDTH 0 73 74 /* 75 * Parameters for self_announce_delay giving a stream of RARP/ARP 76 * packets after migration. 77 */ 78 #define DEFAULT_MIGRATE_ANNOUNCE_INITIAL 50 79 #define DEFAULT_MIGRATE_ANNOUNCE_MAX 550 80 #define DEFAULT_MIGRATE_ANNOUNCE_ROUNDS 5 81 #define DEFAULT_MIGRATE_ANNOUNCE_STEP 100 82 83 #define DEFINE_PROP_MIG_CAP(name, x) \ 84 DEFINE_PROP_BOOL(name, MigrationState, capabilities[x], false) 85 86 #define DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT_PERIOD 1000 /* milliseconds */ 87 #define DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT 1 /* MB/s */ 88 89 const Property migration_properties[] = { 90 DEFINE_PROP_BOOL("store-global-state", MigrationState, 91 store_global_state, true), 92 DEFINE_PROP_BOOL("send-configuration", MigrationState, 93 send_configuration, true), 94 DEFINE_PROP_BOOL("send-section-footer", MigrationState, 95 send_section_footer, true), 96 DEFINE_PROP_BOOL("send-switchover-start", MigrationState, 97 send_switchover_start, true), 98 DEFINE_PROP_BOOL("multifd-flush-after-each-section", MigrationState, 99 multifd_flush_after_each_section, false), 100 DEFINE_PROP_UINT8("x-clear-bitmap-shift", MigrationState, 101 clear_bitmap_shift, CLEAR_BITMAP_SHIFT_DEFAULT), 102 DEFINE_PROP_BOOL("x-preempt-pre-7-2", MigrationState, 103 preempt_pre_7_2, false), 104 DEFINE_PROP_BOOL("multifd-clean-tls-termination", MigrationState, 105 multifd_clean_tls_termination, true), 106 107 /* Migration parameters */ 108 DEFINE_PROP_UINT8("x-throttle-trigger-threshold", MigrationState, 109 parameters.throttle_trigger_threshold, 110 DEFAULT_MIGRATE_THROTTLE_TRIGGER_THRESHOLD), 111 DEFINE_PROP_UINT8("x-cpu-throttle-initial", MigrationState, 112 parameters.cpu_throttle_initial, 113 DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL), 114 DEFINE_PROP_UINT8("x-cpu-throttle-increment", MigrationState, 115 parameters.cpu_throttle_increment, 116 DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT), 117 DEFINE_PROP_BOOL("x-cpu-throttle-tailslow", MigrationState, 118 parameters.cpu_throttle_tailslow, false), 119 DEFINE_PROP_SIZE("x-max-bandwidth", MigrationState, 120 parameters.max_bandwidth, MAX_THROTTLE), 121 DEFINE_PROP_SIZE("avail-switchover-bandwidth", MigrationState, 122 parameters.avail_switchover_bandwidth, 0), 123 DEFINE_PROP_UINT64("x-downtime-limit", MigrationState, 124 parameters.downtime_limit, 125 DEFAULT_MIGRATE_SET_DOWNTIME), 126 DEFINE_PROP_UINT32("x-checkpoint-delay", MigrationState, 127 parameters.x_checkpoint_delay, 128 DEFAULT_MIGRATE_X_CHECKPOINT_DELAY), 129 DEFINE_PROP_UINT8("multifd-channels", MigrationState, 130 parameters.multifd_channels, 131 DEFAULT_MIGRATE_MULTIFD_CHANNELS), 132 DEFINE_PROP_MULTIFD_COMPRESSION("multifd-compression", MigrationState, 133 parameters.multifd_compression, 134 DEFAULT_MIGRATE_MULTIFD_COMPRESSION), 135 DEFINE_PROP_UINT8("multifd-zlib-level", MigrationState, 136 parameters.multifd_zlib_level, 137 DEFAULT_MIGRATE_MULTIFD_ZLIB_LEVEL), 138 DEFINE_PROP_UINT8("multifd-qatzip-level", MigrationState, 139 parameters.multifd_qatzip_level, 140 DEFAULT_MIGRATE_MULTIFD_QATZIP_LEVEL), 141 DEFINE_PROP_UINT8("multifd-zstd-level", MigrationState, 142 parameters.multifd_zstd_level, 143 DEFAULT_MIGRATE_MULTIFD_ZSTD_LEVEL), 144 DEFINE_PROP_SIZE("xbzrle-cache-size", MigrationState, 145 parameters.xbzrle_cache_size, 146 DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE), 147 DEFINE_PROP_SIZE("max-postcopy-bandwidth", MigrationState, 148 parameters.max_postcopy_bandwidth, 149 DEFAULT_MIGRATE_MAX_POSTCOPY_BANDWIDTH), 150 DEFINE_PROP_UINT8("max-cpu-throttle", MigrationState, 151 parameters.max_cpu_throttle, 152 DEFAULT_MIGRATE_MAX_CPU_THROTTLE), 153 DEFINE_PROP_SIZE("announce-initial", MigrationState, 154 parameters.announce_initial, 155 DEFAULT_MIGRATE_ANNOUNCE_INITIAL), 156 DEFINE_PROP_SIZE("announce-max", MigrationState, 157 parameters.announce_max, 158 DEFAULT_MIGRATE_ANNOUNCE_MAX), 159 DEFINE_PROP_SIZE("announce-rounds", MigrationState, 160 parameters.announce_rounds, 161 DEFAULT_MIGRATE_ANNOUNCE_ROUNDS), 162 DEFINE_PROP_SIZE("announce-step", MigrationState, 163 parameters.announce_step, 164 DEFAULT_MIGRATE_ANNOUNCE_STEP), 165 DEFINE_PROP_STRING("tls-creds", MigrationState, parameters.tls_creds), 166 DEFINE_PROP_STRING("tls-hostname", MigrationState, parameters.tls_hostname), 167 DEFINE_PROP_STRING("tls-authz", MigrationState, parameters.tls_authz), 168 DEFINE_PROP_UINT64("x-vcpu-dirty-limit-period", MigrationState, 169 parameters.x_vcpu_dirty_limit_period, 170 DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT_PERIOD), 171 DEFINE_PROP_UINT64("vcpu-dirty-limit", MigrationState, 172 parameters.vcpu_dirty_limit, 173 DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT), 174 DEFINE_PROP_MIG_MODE("mode", MigrationState, 175 parameters.mode, 176 MIG_MODE_NORMAL), 177 DEFINE_PROP_ZERO_PAGE_DETECTION("zero-page-detection", MigrationState, 178 parameters.zero_page_detection, 179 ZERO_PAGE_DETECTION_MULTIFD), 180 181 /* Migration capabilities */ 182 DEFINE_PROP_MIG_CAP("x-xbzrle", MIGRATION_CAPABILITY_XBZRLE), 183 DEFINE_PROP_MIG_CAP("x-rdma-pin-all", MIGRATION_CAPABILITY_RDMA_PIN_ALL), 184 DEFINE_PROP_MIG_CAP("x-auto-converge", MIGRATION_CAPABILITY_AUTO_CONVERGE), 185 DEFINE_PROP_MIG_CAP("x-zero-blocks", MIGRATION_CAPABILITY_ZERO_BLOCKS), 186 DEFINE_PROP_MIG_CAP("x-events", MIGRATION_CAPABILITY_EVENTS), 187 DEFINE_PROP_MIG_CAP("x-postcopy-ram", MIGRATION_CAPABILITY_POSTCOPY_RAM), 188 DEFINE_PROP_MIG_CAP("x-postcopy-preempt", 189 MIGRATION_CAPABILITY_POSTCOPY_PREEMPT), 190 DEFINE_PROP_MIG_CAP("x-colo", MIGRATION_CAPABILITY_X_COLO), 191 DEFINE_PROP_MIG_CAP("x-release-ram", MIGRATION_CAPABILITY_RELEASE_RAM), 192 DEFINE_PROP_MIG_CAP("x-return-path", MIGRATION_CAPABILITY_RETURN_PATH), 193 DEFINE_PROP_MIG_CAP("x-multifd", MIGRATION_CAPABILITY_MULTIFD), 194 DEFINE_PROP_MIG_CAP("x-background-snapshot", 195 MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT), 196 #ifdef CONFIG_LINUX 197 DEFINE_PROP_MIG_CAP("x-zero-copy-send", 198 MIGRATION_CAPABILITY_ZERO_COPY_SEND), 199 #endif 200 DEFINE_PROP_MIG_CAP("x-switchover-ack", 201 MIGRATION_CAPABILITY_SWITCHOVER_ACK), 202 DEFINE_PROP_MIG_CAP("x-dirty-limit", MIGRATION_CAPABILITY_DIRTY_LIMIT), 203 DEFINE_PROP_MIG_CAP("mapped-ram", MIGRATION_CAPABILITY_MAPPED_RAM), 204 }; 205 const size_t migration_properties_count = ARRAY_SIZE(migration_properties); 206 207 bool migrate_auto_converge(void) 208 { 209 MigrationState *s = migrate_get_current(); 210 211 return s->capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; 212 } 213 214 bool migrate_send_switchover_start(void) 215 { 216 MigrationState *s = migrate_get_current(); 217 218 return s->send_switchover_start; 219 } 220 221 bool migrate_background_snapshot(void) 222 { 223 MigrationState *s = migrate_get_current(); 224 225 return s->capabilities[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]; 226 } 227 228 bool migrate_colo(void) 229 { 230 MigrationState *s = migrate_get_current(); 231 232 return s->capabilities[MIGRATION_CAPABILITY_X_COLO]; 233 } 234 235 bool migrate_dirty_bitmaps(void) 236 { 237 MigrationState *s = migrate_get_current(); 238 239 return s->capabilities[MIGRATION_CAPABILITY_DIRTY_BITMAPS]; 240 } 241 242 bool migrate_dirty_limit(void) 243 { 244 MigrationState *s = migrate_get_current(); 245 246 return s->capabilities[MIGRATION_CAPABILITY_DIRTY_LIMIT]; 247 } 248 249 bool migrate_events(void) 250 { 251 MigrationState *s = migrate_get_current(); 252 253 return s->capabilities[MIGRATION_CAPABILITY_EVENTS]; 254 } 255 256 bool migrate_mapped_ram(void) 257 { 258 MigrationState *s = migrate_get_current(); 259 260 return s->capabilities[MIGRATION_CAPABILITY_MAPPED_RAM]; 261 } 262 263 bool migrate_ignore_shared(void) 264 { 265 MigrationState *s = migrate_get_current(); 266 267 return s->capabilities[MIGRATION_CAPABILITY_X_IGNORE_SHARED]; 268 } 269 270 bool migrate_late_block_activate(void) 271 { 272 MigrationState *s = migrate_get_current(); 273 274 return s->capabilities[MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE]; 275 } 276 277 bool migrate_multifd(void) 278 { 279 MigrationState *s = migrate_get_current(); 280 281 return s->capabilities[MIGRATION_CAPABILITY_MULTIFD]; 282 } 283 284 bool migrate_pause_before_switchover(void) 285 { 286 MigrationState *s = migrate_get_current(); 287 288 return s->capabilities[MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER]; 289 } 290 291 bool migrate_postcopy_blocktime(void) 292 { 293 MigrationState *s = migrate_get_current(); 294 295 return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME]; 296 } 297 298 bool migrate_postcopy_preempt(void) 299 { 300 MigrationState *s = migrate_get_current(); 301 302 return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT]; 303 } 304 305 bool migrate_postcopy_ram(void) 306 { 307 MigrationState *s = migrate_get_current(); 308 309 return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM]; 310 } 311 312 bool migrate_rdma_pin_all(void) 313 { 314 MigrationState *s = migrate_get_current(); 315 316 return s->capabilities[MIGRATION_CAPABILITY_RDMA_PIN_ALL]; 317 } 318 319 bool migrate_release_ram(void) 320 { 321 MigrationState *s = migrate_get_current(); 322 323 return s->capabilities[MIGRATION_CAPABILITY_RELEASE_RAM]; 324 } 325 326 bool migrate_return_path(void) 327 { 328 MigrationState *s = migrate_get_current(); 329 330 return s->capabilities[MIGRATION_CAPABILITY_RETURN_PATH]; 331 } 332 333 bool migrate_switchover_ack(void) 334 { 335 MigrationState *s = migrate_get_current(); 336 337 return s->capabilities[MIGRATION_CAPABILITY_SWITCHOVER_ACK]; 338 } 339 340 bool migrate_validate_uuid(void) 341 { 342 MigrationState *s = migrate_get_current(); 343 344 return s->capabilities[MIGRATION_CAPABILITY_VALIDATE_UUID]; 345 } 346 347 bool migrate_xbzrle(void) 348 { 349 MigrationState *s = migrate_get_current(); 350 351 return s->capabilities[MIGRATION_CAPABILITY_XBZRLE]; 352 } 353 354 bool migrate_zero_copy_send(void) 355 { 356 MigrationState *s = migrate_get_current(); 357 358 return s->capabilities[MIGRATION_CAPABILITY_ZERO_COPY_SEND]; 359 } 360 361 /* pseudo capabilities */ 362 363 bool migrate_multifd_flush_after_each_section(void) 364 { 365 MigrationState *s = migrate_get_current(); 366 367 return s->multifd_flush_after_each_section; 368 } 369 370 bool migrate_postcopy(void) 371 { 372 return migrate_postcopy_ram() || migrate_dirty_bitmaps(); 373 } 374 375 bool migrate_rdma(void) 376 { 377 MigrationState *s = migrate_get_current(); 378 379 return s->rdma_migration; 380 } 381 382 bool migrate_tls(void) 383 { 384 MigrationState *s = migrate_get_current(); 385 386 return s->parameters.tls_creds && *s->parameters.tls_creds; 387 } 388 389 typedef enum WriteTrackingSupport { 390 WT_SUPPORT_UNKNOWN = 0, 391 WT_SUPPORT_ABSENT, 392 WT_SUPPORT_AVAILABLE, 393 WT_SUPPORT_COMPATIBLE 394 } WriteTrackingSupport; 395 396 static 397 WriteTrackingSupport migrate_query_write_tracking(void) 398 { 399 /* Check if kernel supports required UFFD features */ 400 if (!ram_write_tracking_available()) { 401 return WT_SUPPORT_ABSENT; 402 } 403 /* 404 * Check if current memory configuration is 405 * compatible with required UFFD features. 406 */ 407 if (!ram_write_tracking_compatible()) { 408 return WT_SUPPORT_AVAILABLE; 409 } 410 411 return WT_SUPPORT_COMPATIBLE; 412 } 413 414 /* Migration capabilities set */ 415 struct MigrateCapsSet { 416 int size; /* Capability set size */ 417 MigrationCapability caps[]; /* Variadic array of capabilities */ 418 }; 419 typedef struct MigrateCapsSet MigrateCapsSet; 420 421 /* Define and initialize MigrateCapsSet */ 422 #define INITIALIZE_MIGRATE_CAPS_SET(_name, ...) \ 423 MigrateCapsSet _name = { \ 424 .size = sizeof((int []) { __VA_ARGS__ }) / sizeof(int), \ 425 .caps = { __VA_ARGS__ } \ 426 } 427 428 /* Background-snapshot compatibility check list */ 429 static const 430 INITIALIZE_MIGRATE_CAPS_SET(check_caps_background_snapshot, 431 MIGRATION_CAPABILITY_POSTCOPY_RAM, 432 MIGRATION_CAPABILITY_DIRTY_BITMAPS, 433 MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME, 434 MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE, 435 MIGRATION_CAPABILITY_RETURN_PATH, 436 MIGRATION_CAPABILITY_MULTIFD, 437 MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER, 438 MIGRATION_CAPABILITY_AUTO_CONVERGE, 439 MIGRATION_CAPABILITY_RELEASE_RAM, 440 MIGRATION_CAPABILITY_RDMA_PIN_ALL, 441 MIGRATION_CAPABILITY_XBZRLE, 442 MIGRATION_CAPABILITY_X_COLO, 443 MIGRATION_CAPABILITY_VALIDATE_UUID, 444 MIGRATION_CAPABILITY_ZERO_COPY_SEND); 445 446 static bool migrate_incoming_started(void) 447 { 448 return !!migration_incoming_get_current()->transport_data; 449 } 450 451 /** 452 * @migration_caps_check - check capability compatibility 453 * 454 * @old_caps: old capability list 455 * @new_caps: new capability list 456 * @errp: set *errp if the check failed, with reason 457 * 458 * Returns true if check passed, otherwise false. 459 */ 460 bool migrate_caps_check(bool *old_caps, bool *new_caps, Error **errp) 461 { 462 ERRP_GUARD(); 463 MigrationIncomingState *mis = migration_incoming_get_current(); 464 465 if (new_caps[MIGRATION_CAPABILITY_ZERO_BLOCKS]) { 466 warn_report("zero-blocks capability is deprecated"); 467 } 468 469 #ifndef CONFIG_REPLICATION 470 if (new_caps[MIGRATION_CAPABILITY_X_COLO]) { 471 error_setg(errp, "QEMU compiled without replication module" 472 " can't enable COLO"); 473 error_append_hint(errp, "Please enable replication before COLO.\n"); 474 return false; 475 } 476 #endif 477 478 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 479 /* This check is reasonably expensive, so only when it's being 480 * set the first time, also it's only the destination that needs 481 * special support. 482 */ 483 if (!old_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM] && 484 runstate_check(RUN_STATE_INMIGRATE) && 485 !postcopy_ram_supported_by_host(mis, errp)) { 486 error_prepend(errp, "Postcopy is not supported: "); 487 return false; 488 } 489 490 if (new_caps[MIGRATION_CAPABILITY_X_IGNORE_SHARED]) { 491 error_setg(errp, "Postcopy is not compatible with ignore-shared"); 492 return false; 493 } 494 495 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 496 error_setg(errp, "Postcopy is not yet compatible with multifd"); 497 return false; 498 } 499 } 500 501 if (new_caps[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]) { 502 WriteTrackingSupport wt_support; 503 int idx; 504 /* 505 * Check if 'background-snapshot' capability is supported by 506 * host kernel and compatible with guest memory configuration. 507 */ 508 wt_support = migrate_query_write_tracking(); 509 if (wt_support < WT_SUPPORT_AVAILABLE) { 510 error_setg(errp, "Background-snapshot is not supported by host kernel"); 511 return false; 512 } 513 if (wt_support < WT_SUPPORT_COMPATIBLE) { 514 error_setg(errp, "Background-snapshot is not compatible " 515 "with guest memory configuration"); 516 return false; 517 } 518 519 /* 520 * Check if there are any migration capabilities 521 * incompatible with 'background-snapshot'. 522 */ 523 for (idx = 0; idx < check_caps_background_snapshot.size; idx++) { 524 int incomp_cap = check_caps_background_snapshot.caps[idx]; 525 if (new_caps[incomp_cap]) { 526 error_setg(errp, 527 "Background-snapshot is not compatible with %s", 528 MigrationCapability_str(incomp_cap)); 529 return false; 530 } 531 } 532 } 533 534 #ifdef CONFIG_LINUX 535 if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND] && 536 (!new_caps[MIGRATION_CAPABILITY_MULTIFD] || 537 new_caps[MIGRATION_CAPABILITY_XBZRLE] || 538 migrate_multifd_compression() || 539 migrate_tls())) { 540 error_setg(errp, 541 "Zero copy only available for non-compressed non-TLS multifd migration"); 542 return false; 543 } 544 #else 545 if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND]) { 546 error_setg(errp, 547 "Zero copy currently only available on Linux"); 548 return false; 549 } 550 #endif 551 552 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT]) { 553 if (!new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 554 error_setg(errp, "Postcopy preempt requires postcopy-ram"); 555 return false; 556 } 557 558 if (migrate_incoming_started()) { 559 error_setg(errp, 560 "Postcopy preempt must be set before incoming starts"); 561 return false; 562 } 563 } 564 565 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 566 if (migrate_incoming_started()) { 567 error_setg(errp, "Multifd must be set before incoming starts"); 568 return false; 569 } 570 } 571 572 if (new_caps[MIGRATION_CAPABILITY_SWITCHOVER_ACK]) { 573 if (!new_caps[MIGRATION_CAPABILITY_RETURN_PATH]) { 574 error_setg(errp, "Capability 'switchover-ack' requires capability " 575 "'return-path'"); 576 return false; 577 } 578 } 579 if (new_caps[MIGRATION_CAPABILITY_DIRTY_LIMIT]) { 580 if (new_caps[MIGRATION_CAPABILITY_AUTO_CONVERGE]) { 581 error_setg(errp, "dirty-limit conflicts with auto-converge" 582 " either of then available currently"); 583 return false; 584 } 585 586 if (!kvm_enabled() || !kvm_dirty_ring_enabled()) { 587 error_setg(errp, "dirty-limit requires KVM with accelerator" 588 " property 'dirty-ring-size' set"); 589 return false; 590 } 591 } 592 593 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 594 if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) { 595 error_setg(errp, "Multifd is not compatible with xbzrle"); 596 return false; 597 } 598 } 599 600 if (new_caps[MIGRATION_CAPABILITY_MAPPED_RAM]) { 601 if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) { 602 error_setg(errp, 603 "Mapped-ram migration is incompatible with xbzrle"); 604 return false; 605 } 606 607 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 608 error_setg(errp, 609 "Mapped-ram migration is incompatible with postcopy"); 610 return false; 611 } 612 } 613 614 return true; 615 } 616 617 MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) 618 { 619 MigrationCapabilityStatusList *head = NULL, **tail = &head; 620 MigrationCapabilityStatus *caps; 621 MigrationState *s = migrate_get_current(); 622 int i; 623 624 for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { 625 caps = g_malloc0(sizeof(*caps)); 626 caps->capability = i; 627 caps->state = s->capabilities[i]; 628 QAPI_LIST_APPEND(tail, caps); 629 } 630 631 return head; 632 } 633 634 void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, 635 Error **errp) 636 { 637 MigrationState *s = migrate_get_current(); 638 MigrationCapabilityStatusList *cap; 639 bool new_caps[MIGRATION_CAPABILITY__MAX]; 640 641 if (migration_is_running() || migration_in_colo_state()) { 642 error_setg(errp, "There's a migration process in progress"); 643 return; 644 } 645 646 memcpy(new_caps, s->capabilities, sizeof(new_caps)); 647 for (cap = params; cap; cap = cap->next) { 648 new_caps[cap->value->capability] = cap->value->state; 649 } 650 651 if (!migrate_caps_check(s->capabilities, new_caps, errp)) { 652 return; 653 } 654 655 for (cap = params; cap; cap = cap->next) { 656 s->capabilities[cap->value->capability] = cap->value->state; 657 } 658 } 659 660 /* parameters */ 661 662 const BitmapMigrationNodeAliasList *migrate_block_bitmap_mapping(void) 663 { 664 MigrationState *s = migrate_get_current(); 665 666 return s->parameters.block_bitmap_mapping; 667 } 668 669 bool migrate_has_block_bitmap_mapping(void) 670 { 671 MigrationState *s = migrate_get_current(); 672 673 return s->parameters.has_block_bitmap_mapping; 674 } 675 676 uint32_t migrate_checkpoint_delay(void) 677 { 678 MigrationState *s = migrate_get_current(); 679 680 return s->parameters.x_checkpoint_delay; 681 } 682 683 uint8_t migrate_cpu_throttle_increment(void) 684 { 685 MigrationState *s = migrate_get_current(); 686 687 return s->parameters.cpu_throttle_increment; 688 } 689 690 uint8_t migrate_cpu_throttle_initial(void) 691 { 692 MigrationState *s = migrate_get_current(); 693 694 return s->parameters.cpu_throttle_initial; 695 } 696 697 bool migrate_cpu_throttle_tailslow(void) 698 { 699 MigrationState *s = migrate_get_current(); 700 701 return s->parameters.cpu_throttle_tailslow; 702 } 703 704 bool migrate_direct_io(void) 705 { 706 MigrationState *s = migrate_get_current(); 707 708 /* 709 * O_DIRECT is only supported with mapped-ram and multifd. 710 * 711 * mapped-ram is needed because filesystems impose restrictions on 712 * O_DIRECT IO alignment (see MAPPED_RAM_FILE_OFFSET_ALIGNMENT). 713 * 714 * multifd is needed to keep the unaligned portion of the stream 715 * isolated to the main migration thread while multifd channels 716 * process the aligned data with O_DIRECT enabled. 717 */ 718 return s->parameters.direct_io && 719 s->capabilities[MIGRATION_CAPABILITY_MAPPED_RAM] && 720 s->capabilities[MIGRATION_CAPABILITY_MULTIFD]; 721 } 722 723 uint64_t migrate_downtime_limit(void) 724 { 725 MigrationState *s = migrate_get_current(); 726 727 return s->parameters.downtime_limit; 728 } 729 730 uint8_t migrate_max_cpu_throttle(void) 731 { 732 MigrationState *s = migrate_get_current(); 733 734 return s->parameters.max_cpu_throttle; 735 } 736 737 uint64_t migrate_max_bandwidth(void) 738 { 739 MigrationState *s = migrate_get_current(); 740 741 return s->parameters.max_bandwidth; 742 } 743 744 uint64_t migrate_avail_switchover_bandwidth(void) 745 { 746 MigrationState *s = migrate_get_current(); 747 748 return s->parameters.avail_switchover_bandwidth; 749 } 750 751 uint64_t migrate_max_postcopy_bandwidth(void) 752 { 753 MigrationState *s = migrate_get_current(); 754 755 return s->parameters.max_postcopy_bandwidth; 756 } 757 758 MigMode migrate_mode(void) 759 { 760 MigMode mode = cpr_get_incoming_mode(); 761 762 if (mode == MIG_MODE_NONE) { 763 mode = migrate_get_current()->parameters.mode; 764 } 765 766 assert(mode >= 0 && mode < MIG_MODE__MAX); 767 return mode; 768 } 769 770 int migrate_multifd_channels(void) 771 { 772 MigrationState *s = migrate_get_current(); 773 774 return s->parameters.multifd_channels; 775 } 776 777 MultiFDCompression migrate_multifd_compression(void) 778 { 779 MigrationState *s = migrate_get_current(); 780 781 assert(s->parameters.multifd_compression < MULTIFD_COMPRESSION__MAX); 782 return s->parameters.multifd_compression; 783 } 784 785 int migrate_multifd_zlib_level(void) 786 { 787 MigrationState *s = migrate_get_current(); 788 789 return s->parameters.multifd_zlib_level; 790 } 791 792 int migrate_multifd_qatzip_level(void) 793 { 794 MigrationState *s = migrate_get_current(); 795 796 return s->parameters.multifd_qatzip_level; 797 } 798 799 int migrate_multifd_zstd_level(void) 800 { 801 MigrationState *s = migrate_get_current(); 802 803 return s->parameters.multifd_zstd_level; 804 } 805 806 uint8_t migrate_throttle_trigger_threshold(void) 807 { 808 MigrationState *s = migrate_get_current(); 809 810 return s->parameters.throttle_trigger_threshold; 811 } 812 813 const char *migrate_tls_authz(void) 814 { 815 MigrationState *s = migrate_get_current(); 816 817 return s->parameters.tls_authz; 818 } 819 820 const char *migrate_tls_creds(void) 821 { 822 MigrationState *s = migrate_get_current(); 823 824 return s->parameters.tls_creds; 825 } 826 827 const char *migrate_tls_hostname(void) 828 { 829 MigrationState *s = migrate_get_current(); 830 831 return s->parameters.tls_hostname; 832 } 833 834 uint64_t migrate_vcpu_dirty_limit_period(void) 835 { 836 MigrationState *s = migrate_get_current(); 837 838 return s->parameters.x_vcpu_dirty_limit_period; 839 } 840 841 uint64_t migrate_xbzrle_cache_size(void) 842 { 843 MigrationState *s = migrate_get_current(); 844 845 return s->parameters.xbzrle_cache_size; 846 } 847 848 ZeroPageDetection migrate_zero_page_detection(void) 849 { 850 MigrationState *s = migrate_get_current(); 851 852 return s->parameters.zero_page_detection; 853 } 854 855 /* parameters helpers */ 856 857 AnnounceParameters *migrate_announce_params(void) 858 { 859 static AnnounceParameters ap; 860 861 MigrationState *s = migrate_get_current(); 862 863 ap.initial = s->parameters.announce_initial; 864 ap.max = s->parameters.announce_max; 865 ap.rounds = s->parameters.announce_rounds; 866 ap.step = s->parameters.announce_step; 867 868 return ≈ 869 } 870 871 MigrationParameters *qmp_query_migrate_parameters(Error **errp) 872 { 873 MigrationParameters *params; 874 MigrationState *s = migrate_get_current(); 875 876 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 877 params = g_malloc0(sizeof(*params)); 878 params->has_throttle_trigger_threshold = true; 879 params->throttle_trigger_threshold = s->parameters.throttle_trigger_threshold; 880 params->has_cpu_throttle_initial = true; 881 params->cpu_throttle_initial = s->parameters.cpu_throttle_initial; 882 params->has_cpu_throttle_increment = true; 883 params->cpu_throttle_increment = s->parameters.cpu_throttle_increment; 884 params->has_cpu_throttle_tailslow = true; 885 params->cpu_throttle_tailslow = s->parameters.cpu_throttle_tailslow; 886 params->tls_creds = g_strdup(s->parameters.tls_creds); 887 params->tls_hostname = g_strdup(s->parameters.tls_hostname); 888 params->tls_authz = g_strdup(s->parameters.tls_authz ? 889 s->parameters.tls_authz : ""); 890 params->has_max_bandwidth = true; 891 params->max_bandwidth = s->parameters.max_bandwidth; 892 params->has_avail_switchover_bandwidth = true; 893 params->avail_switchover_bandwidth = s->parameters.avail_switchover_bandwidth; 894 params->has_downtime_limit = true; 895 params->downtime_limit = s->parameters.downtime_limit; 896 params->has_x_checkpoint_delay = true; 897 params->x_checkpoint_delay = s->parameters.x_checkpoint_delay; 898 params->has_multifd_channels = true; 899 params->multifd_channels = s->parameters.multifd_channels; 900 params->has_multifd_compression = true; 901 params->multifd_compression = s->parameters.multifd_compression; 902 params->has_multifd_zlib_level = true; 903 params->multifd_zlib_level = s->parameters.multifd_zlib_level; 904 params->has_multifd_qatzip_level = true; 905 params->multifd_qatzip_level = s->parameters.multifd_qatzip_level; 906 params->has_multifd_zstd_level = true; 907 params->multifd_zstd_level = s->parameters.multifd_zstd_level; 908 params->has_xbzrle_cache_size = true; 909 params->xbzrle_cache_size = s->parameters.xbzrle_cache_size; 910 params->has_max_postcopy_bandwidth = true; 911 params->max_postcopy_bandwidth = s->parameters.max_postcopy_bandwidth; 912 params->has_max_cpu_throttle = true; 913 params->max_cpu_throttle = s->parameters.max_cpu_throttle; 914 params->has_announce_initial = true; 915 params->announce_initial = s->parameters.announce_initial; 916 params->has_announce_max = true; 917 params->announce_max = s->parameters.announce_max; 918 params->has_announce_rounds = true; 919 params->announce_rounds = s->parameters.announce_rounds; 920 params->has_announce_step = true; 921 params->announce_step = s->parameters.announce_step; 922 923 if (s->parameters.has_block_bitmap_mapping) { 924 params->has_block_bitmap_mapping = true; 925 params->block_bitmap_mapping = 926 QAPI_CLONE(BitmapMigrationNodeAliasList, 927 s->parameters.block_bitmap_mapping); 928 } 929 930 params->has_x_vcpu_dirty_limit_period = true; 931 params->x_vcpu_dirty_limit_period = s->parameters.x_vcpu_dirty_limit_period; 932 params->has_vcpu_dirty_limit = true; 933 params->vcpu_dirty_limit = s->parameters.vcpu_dirty_limit; 934 params->has_mode = true; 935 params->mode = s->parameters.mode; 936 params->has_zero_page_detection = true; 937 params->zero_page_detection = s->parameters.zero_page_detection; 938 params->has_direct_io = true; 939 params->direct_io = s->parameters.direct_io; 940 941 return params; 942 } 943 944 void migrate_params_init(MigrationParameters *params) 945 { 946 params->tls_hostname = g_strdup(""); 947 params->tls_creds = g_strdup(""); 948 949 /* Set has_* up only for parameter checks */ 950 params->has_throttle_trigger_threshold = true; 951 params->has_cpu_throttle_initial = true; 952 params->has_cpu_throttle_increment = true; 953 params->has_cpu_throttle_tailslow = true; 954 params->has_max_bandwidth = true; 955 params->has_downtime_limit = true; 956 params->has_x_checkpoint_delay = true; 957 params->has_multifd_channels = true; 958 params->has_multifd_compression = true; 959 params->has_multifd_zlib_level = true; 960 params->has_multifd_qatzip_level = true; 961 params->has_multifd_zstd_level = true; 962 params->has_xbzrle_cache_size = true; 963 params->has_max_postcopy_bandwidth = true; 964 params->has_max_cpu_throttle = true; 965 params->has_announce_initial = true; 966 params->has_announce_max = true; 967 params->has_announce_rounds = true; 968 params->has_announce_step = true; 969 params->has_x_vcpu_dirty_limit_period = true; 970 params->has_vcpu_dirty_limit = true; 971 params->has_mode = true; 972 params->has_zero_page_detection = true; 973 params->has_direct_io = true; 974 } 975 976 /* 977 * Check whether the parameters are valid. Error will be put into errp 978 * (if provided). Return true if valid, otherwise false. 979 */ 980 bool migrate_params_check(MigrationParameters *params, Error **errp) 981 { 982 ERRP_GUARD(); 983 984 if (params->has_throttle_trigger_threshold && 985 (params->throttle_trigger_threshold < 1 || 986 params->throttle_trigger_threshold > 100)) { 987 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 988 "throttle_trigger_threshold", 989 "an integer in the range of 1 to 100"); 990 return false; 991 } 992 993 if (params->has_cpu_throttle_initial && 994 (params->cpu_throttle_initial < 1 || 995 params->cpu_throttle_initial > 99)) { 996 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 997 "cpu_throttle_initial", 998 "an integer in the range of 1 to 99"); 999 return false; 1000 } 1001 1002 if (params->has_cpu_throttle_increment && 1003 (params->cpu_throttle_increment < 1 || 1004 params->cpu_throttle_increment > 99)) { 1005 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1006 "cpu_throttle_increment", 1007 "an integer in the range of 1 to 99"); 1008 return false; 1009 } 1010 1011 if (params->has_max_bandwidth && (params->max_bandwidth > SIZE_MAX)) { 1012 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1013 "max_bandwidth", 1014 "an integer in the range of 0 to "stringify(SIZE_MAX) 1015 " bytes/second"); 1016 return false; 1017 } 1018 1019 if (params->has_avail_switchover_bandwidth && 1020 (params->avail_switchover_bandwidth > SIZE_MAX)) { 1021 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1022 "avail_switchover_bandwidth", 1023 "an integer in the range of 0 to "stringify(SIZE_MAX) 1024 " bytes/second"); 1025 return false; 1026 } 1027 1028 if (params->has_downtime_limit && 1029 (params->downtime_limit > MAX_MIGRATE_DOWNTIME)) { 1030 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1031 "downtime_limit", 1032 "an integer in the range of 0 to " 1033 stringify(MAX_MIGRATE_DOWNTIME)" ms"); 1034 return false; 1035 } 1036 1037 /* x_checkpoint_delay is now always positive */ 1038 1039 if (params->has_multifd_channels && (params->multifd_channels < 1)) { 1040 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1041 "multifd_channels", 1042 "a value between 1 and 255"); 1043 return false; 1044 } 1045 1046 if (params->has_multifd_zlib_level && 1047 (params->multifd_zlib_level > 9)) { 1048 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zlib_level", 1049 "a value between 0 and 9"); 1050 return false; 1051 } 1052 1053 if (params->has_multifd_qatzip_level && 1054 ((params->multifd_qatzip_level > 9) || 1055 (params->multifd_qatzip_level < 1))) { 1056 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_qatzip_level", 1057 "a value between 1 and 9"); 1058 return false; 1059 } 1060 1061 if (params->has_multifd_zstd_level && 1062 (params->multifd_zstd_level > 20)) { 1063 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zstd_level", 1064 "a value between 0 and 20"); 1065 return false; 1066 } 1067 1068 if (params->has_xbzrle_cache_size && 1069 (params->xbzrle_cache_size < qemu_target_page_size() || 1070 !is_power_of_2(params->xbzrle_cache_size))) { 1071 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1072 "xbzrle_cache_size", 1073 "a power of two no less than the target page size"); 1074 return false; 1075 } 1076 1077 if (params->has_max_cpu_throttle && 1078 (params->max_cpu_throttle < params->cpu_throttle_initial || 1079 params->max_cpu_throttle > 99)) { 1080 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1081 "max_cpu_throttle", 1082 "an integer in the range of cpu_throttle_initial to 99"); 1083 return false; 1084 } 1085 1086 if (params->has_announce_initial && 1087 params->announce_initial > 100000) { 1088 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1089 "announce_initial", 1090 "a value between 0 and 100000"); 1091 return false; 1092 } 1093 if (params->has_announce_max && 1094 params->announce_max > 100000) { 1095 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1096 "announce_max", 1097 "a value between 0 and 100000"); 1098 return false; 1099 } 1100 if (params->has_announce_rounds && 1101 params->announce_rounds > 1000) { 1102 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1103 "announce_rounds", 1104 "a value between 0 and 1000"); 1105 return false; 1106 } 1107 if (params->has_announce_step && 1108 (params->announce_step < 1 || 1109 params->announce_step > 10000)) { 1110 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1111 "announce_step", 1112 "a value between 0 and 10000"); 1113 return false; 1114 } 1115 1116 if (params->has_block_bitmap_mapping && 1117 !check_dirty_bitmap_mig_alias_map(params->block_bitmap_mapping, errp)) { 1118 error_prepend(errp, "Invalid mapping given for block-bitmap-mapping: "); 1119 return false; 1120 } 1121 1122 #ifdef CONFIG_LINUX 1123 if (migrate_zero_copy_send() && 1124 ((params->has_multifd_compression && params->multifd_compression) || 1125 (params->tls_creds && *params->tls_creds))) { 1126 error_setg(errp, 1127 "Zero copy only available for non-compressed non-TLS multifd migration"); 1128 return false; 1129 } 1130 #endif 1131 1132 if (migrate_mapped_ram() && 1133 (migrate_multifd_compression() || migrate_tls())) { 1134 error_setg(errp, 1135 "Mapped-ram only available for non-compressed non-TLS multifd migration"); 1136 return false; 1137 } 1138 1139 if (params->has_x_vcpu_dirty_limit_period && 1140 (params->x_vcpu_dirty_limit_period < 1 || 1141 params->x_vcpu_dirty_limit_period > 1000)) { 1142 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1143 "x-vcpu-dirty-limit-period", 1144 "a value between 1 and 1000"); 1145 return false; 1146 } 1147 1148 if (params->has_vcpu_dirty_limit && 1149 (params->vcpu_dirty_limit < 1)) { 1150 error_setg(errp, 1151 "Parameter 'vcpu_dirty_limit' must be greater than 1 MB/s"); 1152 return false; 1153 } 1154 1155 if (params->has_direct_io && params->direct_io && !qemu_has_direct_io()) { 1156 error_setg(errp, "No build-time support for direct-io"); 1157 return false; 1158 } 1159 1160 return true; 1161 } 1162 1163 static void migrate_params_test_apply(MigrateSetParameters *params, 1164 MigrationParameters *dest) 1165 { 1166 *dest = migrate_get_current()->parameters; 1167 1168 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 1169 1170 if (params->has_throttle_trigger_threshold) { 1171 dest->throttle_trigger_threshold = params->throttle_trigger_threshold; 1172 } 1173 1174 if (params->has_cpu_throttle_initial) { 1175 dest->cpu_throttle_initial = params->cpu_throttle_initial; 1176 } 1177 1178 if (params->has_cpu_throttle_increment) { 1179 dest->cpu_throttle_increment = params->cpu_throttle_increment; 1180 } 1181 1182 if (params->has_cpu_throttle_tailslow) { 1183 dest->cpu_throttle_tailslow = params->cpu_throttle_tailslow; 1184 } 1185 1186 if (params->tls_creds) { 1187 assert(params->tls_creds->type == QTYPE_QSTRING); 1188 dest->tls_creds = params->tls_creds->u.s; 1189 } 1190 1191 if (params->tls_hostname) { 1192 assert(params->tls_hostname->type == QTYPE_QSTRING); 1193 dest->tls_hostname = params->tls_hostname->u.s; 1194 } 1195 1196 if (params->has_max_bandwidth) { 1197 dest->max_bandwidth = params->max_bandwidth; 1198 } 1199 1200 if (params->has_avail_switchover_bandwidth) { 1201 dest->avail_switchover_bandwidth = params->avail_switchover_bandwidth; 1202 } 1203 1204 if (params->has_downtime_limit) { 1205 dest->downtime_limit = params->downtime_limit; 1206 } 1207 1208 if (params->has_x_checkpoint_delay) { 1209 dest->x_checkpoint_delay = params->x_checkpoint_delay; 1210 } 1211 1212 if (params->has_multifd_channels) { 1213 dest->multifd_channels = params->multifd_channels; 1214 } 1215 if (params->has_multifd_compression) { 1216 dest->multifd_compression = params->multifd_compression; 1217 } 1218 if (params->has_multifd_qatzip_level) { 1219 dest->multifd_qatzip_level = params->multifd_qatzip_level; 1220 } 1221 if (params->has_multifd_zlib_level) { 1222 dest->multifd_zlib_level = params->multifd_zlib_level; 1223 } 1224 if (params->has_multifd_zstd_level) { 1225 dest->multifd_zstd_level = params->multifd_zstd_level; 1226 } 1227 if (params->has_xbzrle_cache_size) { 1228 dest->xbzrle_cache_size = params->xbzrle_cache_size; 1229 } 1230 if (params->has_max_postcopy_bandwidth) { 1231 dest->max_postcopy_bandwidth = params->max_postcopy_bandwidth; 1232 } 1233 if (params->has_max_cpu_throttle) { 1234 dest->max_cpu_throttle = params->max_cpu_throttle; 1235 } 1236 if (params->has_announce_initial) { 1237 dest->announce_initial = params->announce_initial; 1238 } 1239 if (params->has_announce_max) { 1240 dest->announce_max = params->announce_max; 1241 } 1242 if (params->has_announce_rounds) { 1243 dest->announce_rounds = params->announce_rounds; 1244 } 1245 if (params->has_announce_step) { 1246 dest->announce_step = params->announce_step; 1247 } 1248 1249 if (params->has_block_bitmap_mapping) { 1250 dest->has_block_bitmap_mapping = true; 1251 dest->block_bitmap_mapping = params->block_bitmap_mapping; 1252 } 1253 1254 if (params->has_x_vcpu_dirty_limit_period) { 1255 dest->x_vcpu_dirty_limit_period = 1256 params->x_vcpu_dirty_limit_period; 1257 } 1258 if (params->has_vcpu_dirty_limit) { 1259 dest->vcpu_dirty_limit = params->vcpu_dirty_limit; 1260 } 1261 1262 if (params->has_mode) { 1263 dest->mode = params->mode; 1264 } 1265 1266 if (params->has_zero_page_detection) { 1267 dest->zero_page_detection = params->zero_page_detection; 1268 } 1269 1270 if (params->has_direct_io) { 1271 dest->direct_io = params->direct_io; 1272 } 1273 } 1274 1275 static void migrate_params_apply(MigrateSetParameters *params, Error **errp) 1276 { 1277 MigrationState *s = migrate_get_current(); 1278 1279 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 1280 1281 if (params->has_throttle_trigger_threshold) { 1282 s->parameters.throttle_trigger_threshold = params->throttle_trigger_threshold; 1283 } 1284 1285 if (params->has_cpu_throttle_initial) { 1286 s->parameters.cpu_throttle_initial = params->cpu_throttle_initial; 1287 } 1288 1289 if (params->has_cpu_throttle_increment) { 1290 s->parameters.cpu_throttle_increment = params->cpu_throttle_increment; 1291 } 1292 1293 if (params->has_cpu_throttle_tailslow) { 1294 s->parameters.cpu_throttle_tailslow = params->cpu_throttle_tailslow; 1295 } 1296 1297 if (params->tls_creds) { 1298 g_free(s->parameters.tls_creds); 1299 assert(params->tls_creds->type == QTYPE_QSTRING); 1300 s->parameters.tls_creds = g_strdup(params->tls_creds->u.s); 1301 } 1302 1303 if (params->tls_hostname) { 1304 g_free(s->parameters.tls_hostname); 1305 assert(params->tls_hostname->type == QTYPE_QSTRING); 1306 s->parameters.tls_hostname = g_strdup(params->tls_hostname->u.s); 1307 } 1308 1309 if (params->tls_authz) { 1310 g_free(s->parameters.tls_authz); 1311 assert(params->tls_authz->type == QTYPE_QSTRING); 1312 s->parameters.tls_authz = g_strdup(params->tls_authz->u.s); 1313 } 1314 1315 if (params->has_max_bandwidth) { 1316 s->parameters.max_bandwidth = params->max_bandwidth; 1317 if (s->to_dst_file && !migration_in_postcopy()) { 1318 migration_rate_set(s->parameters.max_bandwidth); 1319 } 1320 } 1321 1322 if (params->has_avail_switchover_bandwidth) { 1323 s->parameters.avail_switchover_bandwidth = params->avail_switchover_bandwidth; 1324 } 1325 1326 if (params->has_downtime_limit) { 1327 s->parameters.downtime_limit = params->downtime_limit; 1328 } 1329 1330 if (params->has_x_checkpoint_delay) { 1331 s->parameters.x_checkpoint_delay = params->x_checkpoint_delay; 1332 colo_checkpoint_delay_set(); 1333 } 1334 1335 if (params->has_multifd_channels) { 1336 s->parameters.multifd_channels = params->multifd_channels; 1337 } 1338 if (params->has_multifd_compression) { 1339 s->parameters.multifd_compression = params->multifd_compression; 1340 } 1341 if (params->has_multifd_qatzip_level) { 1342 s->parameters.multifd_qatzip_level = params->multifd_qatzip_level; 1343 } 1344 if (params->has_multifd_zlib_level) { 1345 s->parameters.multifd_zlib_level = params->multifd_zlib_level; 1346 } 1347 if (params->has_multifd_zstd_level) { 1348 s->parameters.multifd_zstd_level = params->multifd_zstd_level; 1349 } 1350 if (params->has_xbzrle_cache_size) { 1351 s->parameters.xbzrle_cache_size = params->xbzrle_cache_size; 1352 xbzrle_cache_resize(params->xbzrle_cache_size, errp); 1353 } 1354 if (params->has_max_postcopy_bandwidth) { 1355 s->parameters.max_postcopy_bandwidth = params->max_postcopy_bandwidth; 1356 if (s->to_dst_file && migration_in_postcopy()) { 1357 migration_rate_set(s->parameters.max_postcopy_bandwidth); 1358 } 1359 } 1360 if (params->has_max_cpu_throttle) { 1361 s->parameters.max_cpu_throttle = params->max_cpu_throttle; 1362 } 1363 if (params->has_announce_initial) { 1364 s->parameters.announce_initial = params->announce_initial; 1365 } 1366 if (params->has_announce_max) { 1367 s->parameters.announce_max = params->announce_max; 1368 } 1369 if (params->has_announce_rounds) { 1370 s->parameters.announce_rounds = params->announce_rounds; 1371 } 1372 if (params->has_announce_step) { 1373 s->parameters.announce_step = params->announce_step; 1374 } 1375 1376 if (params->has_block_bitmap_mapping) { 1377 qapi_free_BitmapMigrationNodeAliasList( 1378 s->parameters.block_bitmap_mapping); 1379 1380 s->parameters.has_block_bitmap_mapping = true; 1381 s->parameters.block_bitmap_mapping = 1382 QAPI_CLONE(BitmapMigrationNodeAliasList, 1383 params->block_bitmap_mapping); 1384 } 1385 1386 if (params->has_x_vcpu_dirty_limit_period) { 1387 s->parameters.x_vcpu_dirty_limit_period = 1388 params->x_vcpu_dirty_limit_period; 1389 } 1390 if (params->has_vcpu_dirty_limit) { 1391 s->parameters.vcpu_dirty_limit = params->vcpu_dirty_limit; 1392 } 1393 1394 if (params->has_mode) { 1395 s->parameters.mode = params->mode; 1396 } 1397 1398 if (params->has_zero_page_detection) { 1399 s->parameters.zero_page_detection = params->zero_page_detection; 1400 } 1401 1402 if (params->has_direct_io) { 1403 s->parameters.direct_io = params->direct_io; 1404 } 1405 } 1406 1407 void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp) 1408 { 1409 MigrationParameters tmp; 1410 1411 /* TODO Rewrite "" to null instead for all three tls_* parameters */ 1412 if (params->tls_creds 1413 && params->tls_creds->type == QTYPE_QNULL) { 1414 qobject_unref(params->tls_creds->u.n); 1415 params->tls_creds->type = QTYPE_QSTRING; 1416 params->tls_creds->u.s = strdup(""); 1417 } 1418 if (params->tls_hostname 1419 && params->tls_hostname->type == QTYPE_QNULL) { 1420 qobject_unref(params->tls_hostname->u.n); 1421 params->tls_hostname->type = QTYPE_QSTRING; 1422 params->tls_hostname->u.s = strdup(""); 1423 } 1424 if (params->tls_authz 1425 && params->tls_authz->type == QTYPE_QNULL) { 1426 qobject_unref(params->tls_authz->u.n); 1427 params->tls_authz->type = QTYPE_QSTRING; 1428 params->tls_authz->u.s = strdup(""); 1429 } 1430 1431 migrate_params_test_apply(params, &tmp); 1432 1433 if (!migrate_params_check(&tmp, errp)) { 1434 /* Invalid parameter */ 1435 return; 1436 } 1437 1438 migrate_params_apply(params, errp); 1439 } 1440