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 bool migrate_rdma_caps_check(bool *caps, Error **errp) 452 { 453 if (caps[MIGRATION_CAPABILITY_XBZRLE]) { 454 error_setg(errp, "RDMA and XBZRLE can't be used together"); 455 return false; 456 } 457 if (caps[MIGRATION_CAPABILITY_MULTIFD]) { 458 error_setg(errp, "RDMA and multifd can't be used together"); 459 return false; 460 } 461 if (caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 462 error_setg(errp, "RDMA and postcopy-ram can't be used together"); 463 return false; 464 } 465 466 return true; 467 } 468 469 /** 470 * @migration_caps_check - check capability compatibility 471 * 472 * @old_caps: old capability list 473 * @new_caps: new capability list 474 * @errp: set *errp if the check failed, with reason 475 * 476 * Returns true if check passed, otherwise false. 477 */ 478 bool migrate_caps_check(bool *old_caps, bool *new_caps, Error **errp) 479 { 480 ERRP_GUARD(); 481 MigrationIncomingState *mis = migration_incoming_get_current(); 482 483 if (new_caps[MIGRATION_CAPABILITY_ZERO_BLOCKS]) { 484 warn_report("zero-blocks capability is deprecated"); 485 } 486 487 #ifndef CONFIG_REPLICATION 488 if (new_caps[MIGRATION_CAPABILITY_X_COLO]) { 489 error_setg(errp, "QEMU compiled without replication module" 490 " can't enable COLO"); 491 error_append_hint(errp, "Please enable replication before COLO.\n"); 492 return false; 493 } 494 #endif 495 496 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 497 /* This check is reasonably expensive, so only when it's being 498 * set the first time, also it's only the destination that needs 499 * special support. 500 */ 501 if (!old_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM] && 502 runstate_check(RUN_STATE_INMIGRATE) && 503 !postcopy_ram_supported_by_host(mis, errp)) { 504 error_prepend(errp, "Postcopy is not supported: "); 505 return false; 506 } 507 508 if (new_caps[MIGRATION_CAPABILITY_X_IGNORE_SHARED]) { 509 error_setg(errp, "Postcopy is not compatible with ignore-shared"); 510 return false; 511 } 512 513 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 514 error_setg(errp, "Postcopy is not yet compatible with multifd"); 515 return false; 516 } 517 } 518 519 if (new_caps[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]) { 520 WriteTrackingSupport wt_support; 521 int idx; 522 /* 523 * Check if 'background-snapshot' capability is supported by 524 * host kernel and compatible with guest memory configuration. 525 */ 526 wt_support = migrate_query_write_tracking(); 527 if (wt_support < WT_SUPPORT_AVAILABLE) { 528 error_setg(errp, "Background-snapshot is not supported by host kernel"); 529 return false; 530 } 531 if (wt_support < WT_SUPPORT_COMPATIBLE) { 532 error_setg(errp, "Background-snapshot is not compatible " 533 "with guest memory configuration"); 534 return false; 535 } 536 537 /* 538 * Check if there are any migration capabilities 539 * incompatible with 'background-snapshot'. 540 */ 541 for (idx = 0; idx < check_caps_background_snapshot.size; idx++) { 542 int incomp_cap = check_caps_background_snapshot.caps[idx]; 543 if (new_caps[incomp_cap]) { 544 error_setg(errp, 545 "Background-snapshot is not compatible with %s", 546 MigrationCapability_str(incomp_cap)); 547 return false; 548 } 549 } 550 } 551 552 #ifdef CONFIG_LINUX 553 if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND] && 554 (!new_caps[MIGRATION_CAPABILITY_MULTIFD] || 555 new_caps[MIGRATION_CAPABILITY_XBZRLE] || 556 migrate_multifd_compression() || 557 migrate_tls())) { 558 error_setg(errp, 559 "Zero copy only available for non-compressed non-TLS multifd migration"); 560 return false; 561 } 562 #else 563 if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND]) { 564 error_setg(errp, 565 "Zero copy currently only available on Linux"); 566 return false; 567 } 568 #endif 569 570 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT]) { 571 if (!new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 572 error_setg(errp, "Postcopy preempt requires postcopy-ram"); 573 return false; 574 } 575 576 if (migrate_incoming_started()) { 577 error_setg(errp, 578 "Postcopy preempt must be set before incoming starts"); 579 return false; 580 } 581 } 582 583 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 584 if (migrate_incoming_started()) { 585 error_setg(errp, "Multifd must be set before incoming starts"); 586 return false; 587 } 588 } 589 590 if (new_caps[MIGRATION_CAPABILITY_SWITCHOVER_ACK]) { 591 if (!new_caps[MIGRATION_CAPABILITY_RETURN_PATH]) { 592 error_setg(errp, "Capability 'switchover-ack' requires capability " 593 "'return-path'"); 594 return false; 595 } 596 } 597 if (new_caps[MIGRATION_CAPABILITY_DIRTY_LIMIT]) { 598 if (new_caps[MIGRATION_CAPABILITY_AUTO_CONVERGE]) { 599 error_setg(errp, "dirty-limit conflicts with auto-converge" 600 " either of then available currently"); 601 return false; 602 } 603 604 if (!kvm_enabled() || !kvm_dirty_ring_enabled()) { 605 error_setg(errp, "dirty-limit requires KVM with accelerator" 606 " property 'dirty-ring-size' set"); 607 return false; 608 } 609 } 610 611 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 612 if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) { 613 error_setg(errp, "Multifd is not compatible with xbzrle"); 614 return false; 615 } 616 } 617 618 if (new_caps[MIGRATION_CAPABILITY_MAPPED_RAM]) { 619 if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) { 620 error_setg(errp, 621 "Mapped-ram migration is incompatible with xbzrle"); 622 return false; 623 } 624 625 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 626 error_setg(errp, 627 "Mapped-ram migration is incompatible with postcopy"); 628 return false; 629 } 630 } 631 632 /* 633 * On destination side, check the cases that capability is being set 634 * after incoming thread has started. 635 */ 636 if (migrate_rdma() && !migrate_rdma_caps_check(new_caps, errp)) { 637 return false; 638 } 639 return true; 640 } 641 642 MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) 643 { 644 MigrationCapabilityStatusList *head = NULL, **tail = &head; 645 MigrationCapabilityStatus *caps; 646 MigrationState *s = migrate_get_current(); 647 int i; 648 649 for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { 650 caps = g_malloc0(sizeof(*caps)); 651 caps->capability = i; 652 caps->state = s->capabilities[i]; 653 QAPI_LIST_APPEND(tail, caps); 654 } 655 656 return head; 657 } 658 659 void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, 660 Error **errp) 661 { 662 MigrationState *s = migrate_get_current(); 663 MigrationCapabilityStatusList *cap; 664 bool new_caps[MIGRATION_CAPABILITY__MAX]; 665 666 if (migration_is_running() || migration_in_colo_state()) { 667 error_setg(errp, "There's a migration process in progress"); 668 return; 669 } 670 671 memcpy(new_caps, s->capabilities, sizeof(new_caps)); 672 for (cap = params; cap; cap = cap->next) { 673 new_caps[cap->value->capability] = cap->value->state; 674 } 675 676 if (!migrate_caps_check(s->capabilities, new_caps, errp)) { 677 return; 678 } 679 680 for (cap = params; cap; cap = cap->next) { 681 s->capabilities[cap->value->capability] = cap->value->state; 682 } 683 } 684 685 /* parameters */ 686 687 const BitmapMigrationNodeAliasList *migrate_block_bitmap_mapping(void) 688 { 689 MigrationState *s = migrate_get_current(); 690 691 return s->parameters.block_bitmap_mapping; 692 } 693 694 bool migrate_has_block_bitmap_mapping(void) 695 { 696 MigrationState *s = migrate_get_current(); 697 698 return s->parameters.has_block_bitmap_mapping; 699 } 700 701 uint32_t migrate_checkpoint_delay(void) 702 { 703 MigrationState *s = migrate_get_current(); 704 705 return s->parameters.x_checkpoint_delay; 706 } 707 708 uint8_t migrate_cpu_throttle_increment(void) 709 { 710 MigrationState *s = migrate_get_current(); 711 712 return s->parameters.cpu_throttle_increment; 713 } 714 715 uint8_t migrate_cpu_throttle_initial(void) 716 { 717 MigrationState *s = migrate_get_current(); 718 719 return s->parameters.cpu_throttle_initial; 720 } 721 722 bool migrate_cpu_throttle_tailslow(void) 723 { 724 MigrationState *s = migrate_get_current(); 725 726 return s->parameters.cpu_throttle_tailslow; 727 } 728 729 bool migrate_direct_io(void) 730 { 731 MigrationState *s = migrate_get_current(); 732 733 /* 734 * O_DIRECT is only supported with mapped-ram and multifd. 735 * 736 * mapped-ram is needed because filesystems impose restrictions on 737 * O_DIRECT IO alignment (see MAPPED_RAM_FILE_OFFSET_ALIGNMENT). 738 * 739 * multifd is needed to keep the unaligned portion of the stream 740 * isolated to the main migration thread while multifd channels 741 * process the aligned data with O_DIRECT enabled. 742 */ 743 return s->parameters.direct_io && 744 s->capabilities[MIGRATION_CAPABILITY_MAPPED_RAM] && 745 s->capabilities[MIGRATION_CAPABILITY_MULTIFD]; 746 } 747 748 uint64_t migrate_downtime_limit(void) 749 { 750 MigrationState *s = migrate_get_current(); 751 752 return s->parameters.downtime_limit; 753 } 754 755 uint8_t migrate_max_cpu_throttle(void) 756 { 757 MigrationState *s = migrate_get_current(); 758 759 return s->parameters.max_cpu_throttle; 760 } 761 762 uint64_t migrate_max_bandwidth(void) 763 { 764 MigrationState *s = migrate_get_current(); 765 766 return s->parameters.max_bandwidth; 767 } 768 769 uint64_t migrate_avail_switchover_bandwidth(void) 770 { 771 MigrationState *s = migrate_get_current(); 772 773 return s->parameters.avail_switchover_bandwidth; 774 } 775 776 uint64_t migrate_max_postcopy_bandwidth(void) 777 { 778 MigrationState *s = migrate_get_current(); 779 780 return s->parameters.max_postcopy_bandwidth; 781 } 782 783 MigMode migrate_mode(void) 784 { 785 MigMode mode = cpr_get_incoming_mode(); 786 787 if (mode == MIG_MODE_NONE) { 788 mode = migrate_get_current()->parameters.mode; 789 } 790 791 assert(mode >= 0 && mode < MIG_MODE__MAX); 792 return mode; 793 } 794 795 int migrate_multifd_channels(void) 796 { 797 MigrationState *s = migrate_get_current(); 798 799 return s->parameters.multifd_channels; 800 } 801 802 MultiFDCompression migrate_multifd_compression(void) 803 { 804 MigrationState *s = migrate_get_current(); 805 806 assert(s->parameters.multifd_compression < MULTIFD_COMPRESSION__MAX); 807 return s->parameters.multifd_compression; 808 } 809 810 int migrate_multifd_zlib_level(void) 811 { 812 MigrationState *s = migrate_get_current(); 813 814 return s->parameters.multifd_zlib_level; 815 } 816 817 int migrate_multifd_qatzip_level(void) 818 { 819 MigrationState *s = migrate_get_current(); 820 821 return s->parameters.multifd_qatzip_level; 822 } 823 824 int migrate_multifd_zstd_level(void) 825 { 826 MigrationState *s = migrate_get_current(); 827 828 return s->parameters.multifd_zstd_level; 829 } 830 831 uint8_t migrate_throttle_trigger_threshold(void) 832 { 833 MigrationState *s = migrate_get_current(); 834 835 return s->parameters.throttle_trigger_threshold; 836 } 837 838 const char *migrate_tls_authz(void) 839 { 840 MigrationState *s = migrate_get_current(); 841 842 return s->parameters.tls_authz; 843 } 844 845 const char *migrate_tls_creds(void) 846 { 847 MigrationState *s = migrate_get_current(); 848 849 return s->parameters.tls_creds; 850 } 851 852 const char *migrate_tls_hostname(void) 853 { 854 MigrationState *s = migrate_get_current(); 855 856 return s->parameters.tls_hostname; 857 } 858 859 uint64_t migrate_vcpu_dirty_limit_period(void) 860 { 861 MigrationState *s = migrate_get_current(); 862 863 return s->parameters.x_vcpu_dirty_limit_period; 864 } 865 866 uint64_t migrate_xbzrle_cache_size(void) 867 { 868 MigrationState *s = migrate_get_current(); 869 870 return s->parameters.xbzrle_cache_size; 871 } 872 873 ZeroPageDetection migrate_zero_page_detection(void) 874 { 875 MigrationState *s = migrate_get_current(); 876 877 return s->parameters.zero_page_detection; 878 } 879 880 /* parameters helpers */ 881 882 AnnounceParameters *migrate_announce_params(void) 883 { 884 static AnnounceParameters ap; 885 886 MigrationState *s = migrate_get_current(); 887 888 ap.initial = s->parameters.announce_initial; 889 ap.max = s->parameters.announce_max; 890 ap.rounds = s->parameters.announce_rounds; 891 ap.step = s->parameters.announce_step; 892 893 return ≈ 894 } 895 896 MigrationParameters *qmp_query_migrate_parameters(Error **errp) 897 { 898 MigrationParameters *params; 899 MigrationState *s = migrate_get_current(); 900 901 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 902 params = g_malloc0(sizeof(*params)); 903 params->has_throttle_trigger_threshold = true; 904 params->throttle_trigger_threshold = s->parameters.throttle_trigger_threshold; 905 params->has_cpu_throttle_initial = true; 906 params->cpu_throttle_initial = s->parameters.cpu_throttle_initial; 907 params->has_cpu_throttle_increment = true; 908 params->cpu_throttle_increment = s->parameters.cpu_throttle_increment; 909 params->has_cpu_throttle_tailslow = true; 910 params->cpu_throttle_tailslow = s->parameters.cpu_throttle_tailslow; 911 params->tls_creds = g_strdup(s->parameters.tls_creds); 912 params->tls_hostname = g_strdup(s->parameters.tls_hostname); 913 params->tls_authz = g_strdup(s->parameters.tls_authz ? 914 s->parameters.tls_authz : ""); 915 params->has_max_bandwidth = true; 916 params->max_bandwidth = s->parameters.max_bandwidth; 917 params->has_avail_switchover_bandwidth = true; 918 params->avail_switchover_bandwidth = s->parameters.avail_switchover_bandwidth; 919 params->has_downtime_limit = true; 920 params->downtime_limit = s->parameters.downtime_limit; 921 params->has_x_checkpoint_delay = true; 922 params->x_checkpoint_delay = s->parameters.x_checkpoint_delay; 923 params->has_multifd_channels = true; 924 params->multifd_channels = s->parameters.multifd_channels; 925 params->has_multifd_compression = true; 926 params->multifd_compression = s->parameters.multifd_compression; 927 params->has_multifd_zlib_level = true; 928 params->multifd_zlib_level = s->parameters.multifd_zlib_level; 929 params->has_multifd_qatzip_level = true; 930 params->multifd_qatzip_level = s->parameters.multifd_qatzip_level; 931 params->has_multifd_zstd_level = true; 932 params->multifd_zstd_level = s->parameters.multifd_zstd_level; 933 params->has_xbzrle_cache_size = true; 934 params->xbzrle_cache_size = s->parameters.xbzrle_cache_size; 935 params->has_max_postcopy_bandwidth = true; 936 params->max_postcopy_bandwidth = s->parameters.max_postcopy_bandwidth; 937 params->has_max_cpu_throttle = true; 938 params->max_cpu_throttle = s->parameters.max_cpu_throttle; 939 params->has_announce_initial = true; 940 params->announce_initial = s->parameters.announce_initial; 941 params->has_announce_max = true; 942 params->announce_max = s->parameters.announce_max; 943 params->has_announce_rounds = true; 944 params->announce_rounds = s->parameters.announce_rounds; 945 params->has_announce_step = true; 946 params->announce_step = s->parameters.announce_step; 947 948 if (s->parameters.has_block_bitmap_mapping) { 949 params->has_block_bitmap_mapping = true; 950 params->block_bitmap_mapping = 951 QAPI_CLONE(BitmapMigrationNodeAliasList, 952 s->parameters.block_bitmap_mapping); 953 } 954 955 params->has_x_vcpu_dirty_limit_period = true; 956 params->x_vcpu_dirty_limit_period = s->parameters.x_vcpu_dirty_limit_period; 957 params->has_vcpu_dirty_limit = true; 958 params->vcpu_dirty_limit = s->parameters.vcpu_dirty_limit; 959 params->has_mode = true; 960 params->mode = s->parameters.mode; 961 params->has_zero_page_detection = true; 962 params->zero_page_detection = s->parameters.zero_page_detection; 963 params->has_direct_io = true; 964 params->direct_io = s->parameters.direct_io; 965 966 return params; 967 } 968 969 void migrate_params_init(MigrationParameters *params) 970 { 971 params->tls_hostname = g_strdup(""); 972 params->tls_creds = g_strdup(""); 973 974 /* Set has_* up only for parameter checks */ 975 params->has_throttle_trigger_threshold = true; 976 params->has_cpu_throttle_initial = true; 977 params->has_cpu_throttle_increment = true; 978 params->has_cpu_throttle_tailslow = true; 979 params->has_max_bandwidth = true; 980 params->has_downtime_limit = true; 981 params->has_x_checkpoint_delay = true; 982 params->has_multifd_channels = true; 983 params->has_multifd_compression = true; 984 params->has_multifd_zlib_level = true; 985 params->has_multifd_qatzip_level = true; 986 params->has_multifd_zstd_level = true; 987 params->has_xbzrle_cache_size = true; 988 params->has_max_postcopy_bandwidth = true; 989 params->has_max_cpu_throttle = true; 990 params->has_announce_initial = true; 991 params->has_announce_max = true; 992 params->has_announce_rounds = true; 993 params->has_announce_step = true; 994 params->has_x_vcpu_dirty_limit_period = true; 995 params->has_vcpu_dirty_limit = true; 996 params->has_mode = true; 997 params->has_zero_page_detection = true; 998 params->has_direct_io = true; 999 } 1000 1001 /* 1002 * Check whether the parameters are valid. Error will be put into errp 1003 * (if provided). Return true if valid, otherwise false. 1004 */ 1005 bool migrate_params_check(MigrationParameters *params, Error **errp) 1006 { 1007 ERRP_GUARD(); 1008 1009 if (params->has_throttle_trigger_threshold && 1010 (params->throttle_trigger_threshold < 1 || 1011 params->throttle_trigger_threshold > 100)) { 1012 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1013 "throttle_trigger_threshold", 1014 "an integer in the range of 1 to 100"); 1015 return false; 1016 } 1017 1018 if (params->has_cpu_throttle_initial && 1019 (params->cpu_throttle_initial < 1 || 1020 params->cpu_throttle_initial > 99)) { 1021 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1022 "cpu_throttle_initial", 1023 "an integer in the range of 1 to 99"); 1024 return false; 1025 } 1026 1027 if (params->has_cpu_throttle_increment && 1028 (params->cpu_throttle_increment < 1 || 1029 params->cpu_throttle_increment > 99)) { 1030 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1031 "cpu_throttle_increment", 1032 "an integer in the range of 1 to 99"); 1033 return false; 1034 } 1035 1036 if (params->has_max_bandwidth && (params->max_bandwidth > SIZE_MAX)) { 1037 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1038 "max_bandwidth", 1039 "an integer in the range of 0 to "stringify(SIZE_MAX) 1040 " bytes/second"); 1041 return false; 1042 } 1043 1044 if (params->has_avail_switchover_bandwidth && 1045 (params->avail_switchover_bandwidth > SIZE_MAX)) { 1046 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1047 "avail_switchover_bandwidth", 1048 "an integer in the range of 0 to "stringify(SIZE_MAX) 1049 " bytes/second"); 1050 return false; 1051 } 1052 1053 if (params->has_downtime_limit && 1054 (params->downtime_limit > MAX_MIGRATE_DOWNTIME)) { 1055 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1056 "downtime_limit", 1057 "an integer in the range of 0 to " 1058 stringify(MAX_MIGRATE_DOWNTIME)" ms"); 1059 return false; 1060 } 1061 1062 /* x_checkpoint_delay is now always positive */ 1063 1064 if (params->has_multifd_channels && (params->multifd_channels < 1)) { 1065 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1066 "multifd_channels", 1067 "a value between 1 and 255"); 1068 return false; 1069 } 1070 1071 if (params->has_multifd_zlib_level && 1072 (params->multifd_zlib_level > 9)) { 1073 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zlib_level", 1074 "a value between 0 and 9"); 1075 return false; 1076 } 1077 1078 if (params->has_multifd_qatzip_level && 1079 ((params->multifd_qatzip_level > 9) || 1080 (params->multifd_qatzip_level < 1))) { 1081 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_qatzip_level", 1082 "a value between 1 and 9"); 1083 return false; 1084 } 1085 1086 if (params->has_multifd_zstd_level && 1087 (params->multifd_zstd_level > 20)) { 1088 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zstd_level", 1089 "a value between 0 and 20"); 1090 return false; 1091 } 1092 1093 if (params->has_xbzrle_cache_size && 1094 (params->xbzrle_cache_size < qemu_target_page_size() || 1095 !is_power_of_2(params->xbzrle_cache_size))) { 1096 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1097 "xbzrle_cache_size", 1098 "a power of two no less than the target page size"); 1099 return false; 1100 } 1101 1102 if (params->has_max_cpu_throttle && 1103 (params->max_cpu_throttle < params->cpu_throttle_initial || 1104 params->max_cpu_throttle > 99)) { 1105 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1106 "max_cpu_throttle", 1107 "an integer in the range of cpu_throttle_initial to 99"); 1108 return false; 1109 } 1110 1111 if (params->has_announce_initial && 1112 params->announce_initial > 100000) { 1113 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1114 "announce_initial", 1115 "a value between 0 and 100000"); 1116 return false; 1117 } 1118 if (params->has_announce_max && 1119 params->announce_max > 100000) { 1120 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1121 "announce_max", 1122 "a value between 0 and 100000"); 1123 return false; 1124 } 1125 if (params->has_announce_rounds && 1126 params->announce_rounds > 1000) { 1127 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1128 "announce_rounds", 1129 "a value between 0 and 1000"); 1130 return false; 1131 } 1132 if (params->has_announce_step && 1133 (params->announce_step < 1 || 1134 params->announce_step > 10000)) { 1135 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1136 "announce_step", 1137 "a value between 0 and 10000"); 1138 return false; 1139 } 1140 1141 if (params->has_block_bitmap_mapping && 1142 !check_dirty_bitmap_mig_alias_map(params->block_bitmap_mapping, errp)) { 1143 error_prepend(errp, "Invalid mapping given for block-bitmap-mapping: "); 1144 return false; 1145 } 1146 1147 #ifdef CONFIG_LINUX 1148 if (migrate_zero_copy_send() && 1149 ((params->has_multifd_compression && params->multifd_compression) || 1150 (params->tls_creds && *params->tls_creds))) { 1151 error_setg(errp, 1152 "Zero copy only available for non-compressed non-TLS multifd migration"); 1153 return false; 1154 } 1155 #endif 1156 1157 if (migrate_mapped_ram() && 1158 (migrate_multifd_compression() || migrate_tls())) { 1159 error_setg(errp, 1160 "Mapped-ram only available for non-compressed non-TLS multifd migration"); 1161 return false; 1162 } 1163 1164 if (params->has_x_vcpu_dirty_limit_period && 1165 (params->x_vcpu_dirty_limit_period < 1 || 1166 params->x_vcpu_dirty_limit_period > 1000)) { 1167 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1168 "x-vcpu-dirty-limit-period", 1169 "a value between 1 and 1000"); 1170 return false; 1171 } 1172 1173 if (params->has_vcpu_dirty_limit && 1174 (params->vcpu_dirty_limit < 1)) { 1175 error_setg(errp, 1176 "Parameter 'vcpu_dirty_limit' must be greater than 1 MB/s"); 1177 return false; 1178 } 1179 1180 if (params->has_direct_io && params->direct_io && !qemu_has_direct_io()) { 1181 error_setg(errp, "No build-time support for direct-io"); 1182 return false; 1183 } 1184 1185 return true; 1186 } 1187 1188 static void migrate_params_test_apply(MigrateSetParameters *params, 1189 MigrationParameters *dest) 1190 { 1191 *dest = migrate_get_current()->parameters; 1192 1193 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 1194 1195 if (params->has_throttle_trigger_threshold) { 1196 dest->throttle_trigger_threshold = params->throttle_trigger_threshold; 1197 } 1198 1199 if (params->has_cpu_throttle_initial) { 1200 dest->cpu_throttle_initial = params->cpu_throttle_initial; 1201 } 1202 1203 if (params->has_cpu_throttle_increment) { 1204 dest->cpu_throttle_increment = params->cpu_throttle_increment; 1205 } 1206 1207 if (params->has_cpu_throttle_tailslow) { 1208 dest->cpu_throttle_tailslow = params->cpu_throttle_tailslow; 1209 } 1210 1211 if (params->tls_creds) { 1212 assert(params->tls_creds->type == QTYPE_QSTRING); 1213 dest->tls_creds = params->tls_creds->u.s; 1214 } 1215 1216 if (params->tls_hostname) { 1217 assert(params->tls_hostname->type == QTYPE_QSTRING); 1218 dest->tls_hostname = params->tls_hostname->u.s; 1219 } 1220 1221 if (params->has_max_bandwidth) { 1222 dest->max_bandwidth = params->max_bandwidth; 1223 } 1224 1225 if (params->has_avail_switchover_bandwidth) { 1226 dest->avail_switchover_bandwidth = params->avail_switchover_bandwidth; 1227 } 1228 1229 if (params->has_downtime_limit) { 1230 dest->downtime_limit = params->downtime_limit; 1231 } 1232 1233 if (params->has_x_checkpoint_delay) { 1234 dest->x_checkpoint_delay = params->x_checkpoint_delay; 1235 } 1236 1237 if (params->has_multifd_channels) { 1238 dest->multifd_channels = params->multifd_channels; 1239 } 1240 if (params->has_multifd_compression) { 1241 dest->multifd_compression = params->multifd_compression; 1242 } 1243 if (params->has_multifd_qatzip_level) { 1244 dest->multifd_qatzip_level = params->multifd_qatzip_level; 1245 } 1246 if (params->has_multifd_zlib_level) { 1247 dest->multifd_zlib_level = params->multifd_zlib_level; 1248 } 1249 if (params->has_multifd_zstd_level) { 1250 dest->multifd_zstd_level = params->multifd_zstd_level; 1251 } 1252 if (params->has_xbzrle_cache_size) { 1253 dest->xbzrle_cache_size = params->xbzrle_cache_size; 1254 } 1255 if (params->has_max_postcopy_bandwidth) { 1256 dest->max_postcopy_bandwidth = params->max_postcopy_bandwidth; 1257 } 1258 if (params->has_max_cpu_throttle) { 1259 dest->max_cpu_throttle = params->max_cpu_throttle; 1260 } 1261 if (params->has_announce_initial) { 1262 dest->announce_initial = params->announce_initial; 1263 } 1264 if (params->has_announce_max) { 1265 dest->announce_max = params->announce_max; 1266 } 1267 if (params->has_announce_rounds) { 1268 dest->announce_rounds = params->announce_rounds; 1269 } 1270 if (params->has_announce_step) { 1271 dest->announce_step = params->announce_step; 1272 } 1273 1274 if (params->has_block_bitmap_mapping) { 1275 dest->has_block_bitmap_mapping = true; 1276 dest->block_bitmap_mapping = params->block_bitmap_mapping; 1277 } 1278 1279 if (params->has_x_vcpu_dirty_limit_period) { 1280 dest->x_vcpu_dirty_limit_period = 1281 params->x_vcpu_dirty_limit_period; 1282 } 1283 if (params->has_vcpu_dirty_limit) { 1284 dest->vcpu_dirty_limit = params->vcpu_dirty_limit; 1285 } 1286 1287 if (params->has_mode) { 1288 dest->mode = params->mode; 1289 } 1290 1291 if (params->has_zero_page_detection) { 1292 dest->zero_page_detection = params->zero_page_detection; 1293 } 1294 1295 if (params->has_direct_io) { 1296 dest->direct_io = params->direct_io; 1297 } 1298 } 1299 1300 static void migrate_params_apply(MigrateSetParameters *params, Error **errp) 1301 { 1302 MigrationState *s = migrate_get_current(); 1303 1304 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 1305 1306 if (params->has_throttle_trigger_threshold) { 1307 s->parameters.throttle_trigger_threshold = params->throttle_trigger_threshold; 1308 } 1309 1310 if (params->has_cpu_throttle_initial) { 1311 s->parameters.cpu_throttle_initial = params->cpu_throttle_initial; 1312 } 1313 1314 if (params->has_cpu_throttle_increment) { 1315 s->parameters.cpu_throttle_increment = params->cpu_throttle_increment; 1316 } 1317 1318 if (params->has_cpu_throttle_tailslow) { 1319 s->parameters.cpu_throttle_tailslow = params->cpu_throttle_tailslow; 1320 } 1321 1322 if (params->tls_creds) { 1323 g_free(s->parameters.tls_creds); 1324 assert(params->tls_creds->type == QTYPE_QSTRING); 1325 s->parameters.tls_creds = g_strdup(params->tls_creds->u.s); 1326 } 1327 1328 if (params->tls_hostname) { 1329 g_free(s->parameters.tls_hostname); 1330 assert(params->tls_hostname->type == QTYPE_QSTRING); 1331 s->parameters.tls_hostname = g_strdup(params->tls_hostname->u.s); 1332 } 1333 1334 if (params->tls_authz) { 1335 g_free(s->parameters.tls_authz); 1336 assert(params->tls_authz->type == QTYPE_QSTRING); 1337 s->parameters.tls_authz = g_strdup(params->tls_authz->u.s); 1338 } 1339 1340 if (params->has_max_bandwidth) { 1341 s->parameters.max_bandwidth = params->max_bandwidth; 1342 if (s->to_dst_file && !migration_in_postcopy()) { 1343 migration_rate_set(s->parameters.max_bandwidth); 1344 } 1345 } 1346 1347 if (params->has_avail_switchover_bandwidth) { 1348 s->parameters.avail_switchover_bandwidth = params->avail_switchover_bandwidth; 1349 } 1350 1351 if (params->has_downtime_limit) { 1352 s->parameters.downtime_limit = params->downtime_limit; 1353 } 1354 1355 if (params->has_x_checkpoint_delay) { 1356 s->parameters.x_checkpoint_delay = params->x_checkpoint_delay; 1357 colo_checkpoint_delay_set(); 1358 } 1359 1360 if (params->has_multifd_channels) { 1361 s->parameters.multifd_channels = params->multifd_channels; 1362 } 1363 if (params->has_multifd_compression) { 1364 s->parameters.multifd_compression = params->multifd_compression; 1365 } 1366 if (params->has_multifd_qatzip_level) { 1367 s->parameters.multifd_qatzip_level = params->multifd_qatzip_level; 1368 } 1369 if (params->has_multifd_zlib_level) { 1370 s->parameters.multifd_zlib_level = params->multifd_zlib_level; 1371 } 1372 if (params->has_multifd_zstd_level) { 1373 s->parameters.multifd_zstd_level = params->multifd_zstd_level; 1374 } 1375 if (params->has_xbzrle_cache_size) { 1376 s->parameters.xbzrle_cache_size = params->xbzrle_cache_size; 1377 xbzrle_cache_resize(params->xbzrle_cache_size, errp); 1378 } 1379 if (params->has_max_postcopy_bandwidth) { 1380 s->parameters.max_postcopy_bandwidth = params->max_postcopy_bandwidth; 1381 if (s->to_dst_file && migration_in_postcopy()) { 1382 migration_rate_set(s->parameters.max_postcopy_bandwidth); 1383 } 1384 } 1385 if (params->has_max_cpu_throttle) { 1386 s->parameters.max_cpu_throttle = params->max_cpu_throttle; 1387 } 1388 if (params->has_announce_initial) { 1389 s->parameters.announce_initial = params->announce_initial; 1390 } 1391 if (params->has_announce_max) { 1392 s->parameters.announce_max = params->announce_max; 1393 } 1394 if (params->has_announce_rounds) { 1395 s->parameters.announce_rounds = params->announce_rounds; 1396 } 1397 if (params->has_announce_step) { 1398 s->parameters.announce_step = params->announce_step; 1399 } 1400 1401 if (params->has_block_bitmap_mapping) { 1402 qapi_free_BitmapMigrationNodeAliasList( 1403 s->parameters.block_bitmap_mapping); 1404 1405 s->parameters.has_block_bitmap_mapping = true; 1406 s->parameters.block_bitmap_mapping = 1407 QAPI_CLONE(BitmapMigrationNodeAliasList, 1408 params->block_bitmap_mapping); 1409 } 1410 1411 if (params->has_x_vcpu_dirty_limit_period) { 1412 s->parameters.x_vcpu_dirty_limit_period = 1413 params->x_vcpu_dirty_limit_period; 1414 } 1415 if (params->has_vcpu_dirty_limit) { 1416 s->parameters.vcpu_dirty_limit = params->vcpu_dirty_limit; 1417 } 1418 1419 if (params->has_mode) { 1420 s->parameters.mode = params->mode; 1421 } 1422 1423 if (params->has_zero_page_detection) { 1424 s->parameters.zero_page_detection = params->zero_page_detection; 1425 } 1426 1427 if (params->has_direct_io) { 1428 s->parameters.direct_io = params->direct_io; 1429 } 1430 } 1431 1432 void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp) 1433 { 1434 MigrationParameters tmp; 1435 1436 /* TODO Rewrite "" to null instead for all three tls_* parameters */ 1437 if (params->tls_creds 1438 && params->tls_creds->type == QTYPE_QNULL) { 1439 qobject_unref(params->tls_creds->u.n); 1440 params->tls_creds->type = QTYPE_QSTRING; 1441 params->tls_creds->u.s = strdup(""); 1442 } 1443 if (params->tls_hostname 1444 && params->tls_hostname->type == QTYPE_QNULL) { 1445 qobject_unref(params->tls_hostname->u.n); 1446 params->tls_hostname->type = QTYPE_QSTRING; 1447 params->tls_hostname->u.s = strdup(""); 1448 } 1449 if (params->tls_authz 1450 && params->tls_authz->type == QTYPE_QNULL) { 1451 qobject_unref(params->tls_authz->u.n); 1452 params->tls_authz->type = QTYPE_QSTRING; 1453 params->tls_authz->u.s = strdup(""); 1454 } 1455 1456 migrate_params_test_apply(params, &tmp); 1457 1458 if (!migrate_params_check(&tmp, errp)) { 1459 /* Invalid parameter */ 1460 return; 1461 } 1462 1463 migrate_params_apply(params, errp); 1464 } 1465