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("postcopy-blocktime", 191 MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME), 192 DEFINE_PROP_MIG_CAP("x-colo", MIGRATION_CAPABILITY_X_COLO), 193 DEFINE_PROP_MIG_CAP("x-release-ram", MIGRATION_CAPABILITY_RELEASE_RAM), 194 DEFINE_PROP_MIG_CAP("x-return-path", MIGRATION_CAPABILITY_RETURN_PATH), 195 DEFINE_PROP_MIG_CAP("x-multifd", MIGRATION_CAPABILITY_MULTIFD), 196 DEFINE_PROP_MIG_CAP("x-background-snapshot", 197 MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT), 198 #ifdef CONFIG_LINUX 199 DEFINE_PROP_MIG_CAP("x-zero-copy-send", 200 MIGRATION_CAPABILITY_ZERO_COPY_SEND), 201 #endif 202 DEFINE_PROP_MIG_CAP("x-switchover-ack", 203 MIGRATION_CAPABILITY_SWITCHOVER_ACK), 204 DEFINE_PROP_MIG_CAP("x-dirty-limit", MIGRATION_CAPABILITY_DIRTY_LIMIT), 205 DEFINE_PROP_MIG_CAP("mapped-ram", MIGRATION_CAPABILITY_MAPPED_RAM), 206 }; 207 const size_t migration_properties_count = ARRAY_SIZE(migration_properties); 208 209 bool migrate_auto_converge(void) 210 { 211 MigrationState *s = migrate_get_current(); 212 213 return s->capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; 214 } 215 216 bool migrate_send_switchover_start(void) 217 { 218 MigrationState *s = migrate_get_current(); 219 220 return s->send_switchover_start; 221 } 222 223 bool migrate_background_snapshot(void) 224 { 225 MigrationState *s = migrate_get_current(); 226 227 return s->capabilities[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]; 228 } 229 230 bool migrate_colo(void) 231 { 232 MigrationState *s = migrate_get_current(); 233 234 return s->capabilities[MIGRATION_CAPABILITY_X_COLO]; 235 } 236 237 bool migrate_dirty_bitmaps(void) 238 { 239 MigrationState *s = migrate_get_current(); 240 241 return s->capabilities[MIGRATION_CAPABILITY_DIRTY_BITMAPS]; 242 } 243 244 bool migrate_dirty_limit(void) 245 { 246 MigrationState *s = migrate_get_current(); 247 248 return s->capabilities[MIGRATION_CAPABILITY_DIRTY_LIMIT]; 249 } 250 251 bool migrate_events(void) 252 { 253 MigrationState *s = migrate_get_current(); 254 255 return s->capabilities[MIGRATION_CAPABILITY_EVENTS]; 256 } 257 258 bool migrate_mapped_ram(void) 259 { 260 MigrationState *s = migrate_get_current(); 261 262 return s->capabilities[MIGRATION_CAPABILITY_MAPPED_RAM]; 263 } 264 265 bool migrate_ignore_shared(void) 266 { 267 MigrationState *s = migrate_get_current(); 268 269 return s->capabilities[MIGRATION_CAPABILITY_X_IGNORE_SHARED]; 270 } 271 272 bool migrate_late_block_activate(void) 273 { 274 MigrationState *s = migrate_get_current(); 275 276 return s->capabilities[MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE]; 277 } 278 279 bool migrate_multifd(void) 280 { 281 MigrationState *s = migrate_get_current(); 282 283 return s->capabilities[MIGRATION_CAPABILITY_MULTIFD]; 284 } 285 286 bool migrate_pause_before_switchover(void) 287 { 288 MigrationState *s = migrate_get_current(); 289 290 return s->capabilities[MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER]; 291 } 292 293 bool migrate_postcopy_blocktime(void) 294 { 295 MigrationState *s = migrate_get_current(); 296 297 return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME]; 298 } 299 300 bool migrate_postcopy_preempt(void) 301 { 302 MigrationState *s = migrate_get_current(); 303 304 return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT]; 305 } 306 307 bool migrate_postcopy_ram(void) 308 { 309 MigrationState *s = migrate_get_current(); 310 311 return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM]; 312 } 313 314 bool migrate_rdma_pin_all(void) 315 { 316 MigrationState *s = migrate_get_current(); 317 318 return s->capabilities[MIGRATION_CAPABILITY_RDMA_PIN_ALL]; 319 } 320 321 bool migrate_release_ram(void) 322 { 323 MigrationState *s = migrate_get_current(); 324 325 return s->capabilities[MIGRATION_CAPABILITY_RELEASE_RAM]; 326 } 327 328 bool migrate_return_path(void) 329 { 330 MigrationState *s = migrate_get_current(); 331 332 return s->capabilities[MIGRATION_CAPABILITY_RETURN_PATH]; 333 } 334 335 bool migrate_switchover_ack(void) 336 { 337 MigrationState *s = migrate_get_current(); 338 339 return s->capabilities[MIGRATION_CAPABILITY_SWITCHOVER_ACK]; 340 } 341 342 bool migrate_validate_uuid(void) 343 { 344 MigrationState *s = migrate_get_current(); 345 346 return s->capabilities[MIGRATION_CAPABILITY_VALIDATE_UUID]; 347 } 348 349 bool migrate_xbzrle(void) 350 { 351 MigrationState *s = migrate_get_current(); 352 353 return s->capabilities[MIGRATION_CAPABILITY_XBZRLE]; 354 } 355 356 bool migrate_zero_copy_send(void) 357 { 358 MigrationState *s = migrate_get_current(); 359 360 return s->capabilities[MIGRATION_CAPABILITY_ZERO_COPY_SEND]; 361 } 362 363 /* pseudo capabilities */ 364 365 bool migrate_multifd_flush_after_each_section(void) 366 { 367 MigrationState *s = migrate_get_current(); 368 369 return s->multifd_flush_after_each_section; 370 } 371 372 bool migrate_postcopy(void) 373 { 374 return migrate_postcopy_ram() || migrate_dirty_bitmaps(); 375 } 376 377 bool migrate_rdma(void) 378 { 379 MigrationState *s = migrate_get_current(); 380 381 return s->rdma_migration; 382 } 383 384 bool migrate_tls(void) 385 { 386 MigrationState *s = migrate_get_current(); 387 388 return s->parameters.tls_creds && *s->parameters.tls_creds; 389 } 390 391 typedef enum WriteTrackingSupport { 392 WT_SUPPORT_UNKNOWN = 0, 393 WT_SUPPORT_ABSENT, 394 WT_SUPPORT_AVAILABLE, 395 WT_SUPPORT_COMPATIBLE 396 } WriteTrackingSupport; 397 398 static 399 WriteTrackingSupport migrate_query_write_tracking(void) 400 { 401 /* Check if kernel supports required UFFD features */ 402 if (!ram_write_tracking_available()) { 403 return WT_SUPPORT_ABSENT; 404 } 405 /* 406 * Check if current memory configuration is 407 * compatible with required UFFD features. 408 */ 409 if (!ram_write_tracking_compatible()) { 410 return WT_SUPPORT_AVAILABLE; 411 } 412 413 return WT_SUPPORT_COMPATIBLE; 414 } 415 416 /* Migration capabilities set */ 417 struct MigrateCapsSet { 418 int size; /* Capability set size */ 419 MigrationCapability caps[]; /* Variadic array of capabilities */ 420 }; 421 typedef struct MigrateCapsSet MigrateCapsSet; 422 423 /* Define and initialize MigrateCapsSet */ 424 #define INITIALIZE_MIGRATE_CAPS_SET(_name, ...) \ 425 MigrateCapsSet _name = { \ 426 .size = sizeof((int []) { __VA_ARGS__ }) / sizeof(int), \ 427 .caps = { __VA_ARGS__ } \ 428 } 429 430 /* Background-snapshot compatibility check list */ 431 static const 432 INITIALIZE_MIGRATE_CAPS_SET(check_caps_background_snapshot, 433 MIGRATION_CAPABILITY_POSTCOPY_RAM, 434 MIGRATION_CAPABILITY_DIRTY_BITMAPS, 435 MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME, 436 MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE, 437 MIGRATION_CAPABILITY_RETURN_PATH, 438 MIGRATION_CAPABILITY_MULTIFD, 439 MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER, 440 MIGRATION_CAPABILITY_AUTO_CONVERGE, 441 MIGRATION_CAPABILITY_RELEASE_RAM, 442 MIGRATION_CAPABILITY_RDMA_PIN_ALL, 443 MIGRATION_CAPABILITY_XBZRLE, 444 MIGRATION_CAPABILITY_X_COLO, 445 MIGRATION_CAPABILITY_VALIDATE_UUID, 446 MIGRATION_CAPABILITY_ZERO_COPY_SEND); 447 448 static bool migrate_incoming_started(void) 449 { 450 return !!migration_incoming_get_current()->transport_data; 451 } 452 453 bool migrate_rdma_caps_check(bool *caps, Error **errp) 454 { 455 if (caps[MIGRATION_CAPABILITY_XBZRLE]) { 456 error_setg(errp, "RDMA and XBZRLE can't be used together"); 457 return false; 458 } 459 if (caps[MIGRATION_CAPABILITY_MULTIFD]) { 460 error_setg(errp, "RDMA and multifd can't be used together"); 461 return false; 462 } 463 if (caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 464 error_setg(errp, "RDMA and postcopy-ram can't be used together"); 465 return false; 466 } 467 468 return true; 469 } 470 471 /** 472 * @migration_caps_check - check capability compatibility 473 * 474 * @old_caps: old capability list 475 * @new_caps: new capability list 476 * @errp: set *errp if the check failed, with reason 477 * 478 * Returns true if check passed, otherwise false. 479 */ 480 bool migrate_caps_check(bool *old_caps, bool *new_caps, Error **errp) 481 { 482 ERRP_GUARD(); 483 MigrationIncomingState *mis = migration_incoming_get_current(); 484 485 if (new_caps[MIGRATION_CAPABILITY_ZERO_BLOCKS]) { 486 warn_report("zero-blocks capability is deprecated"); 487 } 488 489 #ifndef CONFIG_REPLICATION 490 if (new_caps[MIGRATION_CAPABILITY_X_COLO]) { 491 error_setg(errp, "QEMU compiled without replication module" 492 " can't enable COLO"); 493 error_append_hint(errp, "Please enable replication before COLO.\n"); 494 return false; 495 } 496 #endif 497 498 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 499 /* This check is reasonably expensive, so only when it's being 500 * set the first time, also it's only the destination that needs 501 * special support. 502 */ 503 if (!old_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM] && 504 runstate_check(RUN_STATE_INMIGRATE) && 505 !postcopy_ram_supported_by_host(mis, errp)) { 506 error_prepend(errp, "Postcopy is not supported: "); 507 return false; 508 } 509 510 if (new_caps[MIGRATION_CAPABILITY_X_IGNORE_SHARED]) { 511 error_setg(errp, "Postcopy is not compatible with ignore-shared"); 512 return false; 513 } 514 } 515 516 if (new_caps[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]) { 517 WriteTrackingSupport wt_support; 518 int idx; 519 /* 520 * Check if 'background-snapshot' capability is supported by 521 * host kernel and compatible with guest memory configuration. 522 */ 523 wt_support = migrate_query_write_tracking(); 524 if (wt_support < WT_SUPPORT_AVAILABLE) { 525 error_setg(errp, "Background-snapshot is not supported by host kernel"); 526 return false; 527 } 528 if (wt_support < WT_SUPPORT_COMPATIBLE) { 529 error_setg(errp, "Background-snapshot is not compatible " 530 "with guest memory configuration"); 531 return false; 532 } 533 534 /* 535 * Check if there are any migration capabilities 536 * incompatible with 'background-snapshot'. 537 */ 538 for (idx = 0; idx < check_caps_background_snapshot.size; idx++) { 539 int incomp_cap = check_caps_background_snapshot.caps[idx]; 540 if (new_caps[incomp_cap]) { 541 error_setg(errp, 542 "Background-snapshot is not compatible with %s", 543 MigrationCapability_str(incomp_cap)); 544 return false; 545 } 546 } 547 } 548 549 #ifdef CONFIG_LINUX 550 if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND] && 551 (!new_caps[MIGRATION_CAPABILITY_MULTIFD] || 552 new_caps[MIGRATION_CAPABILITY_XBZRLE] || 553 migrate_multifd_compression() || 554 migrate_tls())) { 555 error_setg(errp, 556 "Zero copy only available for non-compressed non-TLS multifd migration"); 557 return false; 558 } 559 #else 560 if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND]) { 561 error_setg(errp, 562 "Zero copy currently only available on Linux"); 563 return false; 564 } 565 #endif 566 567 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT]) { 568 if (!new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 569 error_setg(errp, "Postcopy preempt requires postcopy-ram"); 570 return false; 571 } 572 573 if (!migrate_postcopy_preempt() && migrate_incoming_started()) { 574 error_setg(errp, 575 "Postcopy preempt must be set before incoming starts"); 576 return false; 577 } 578 } 579 580 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 581 if (!migrate_multifd() && migrate_incoming_started()) { 582 error_setg(errp, "Multifd must be set before incoming starts"); 583 return false; 584 } 585 } 586 587 if (new_caps[MIGRATION_CAPABILITY_SWITCHOVER_ACK]) { 588 if (!new_caps[MIGRATION_CAPABILITY_RETURN_PATH]) { 589 error_setg(errp, "Capability 'switchover-ack' requires capability " 590 "'return-path'"); 591 return false; 592 } 593 } 594 if (new_caps[MIGRATION_CAPABILITY_DIRTY_LIMIT]) { 595 if (new_caps[MIGRATION_CAPABILITY_AUTO_CONVERGE]) { 596 error_setg(errp, "dirty-limit conflicts with auto-converge" 597 " either of then available currently"); 598 return false; 599 } 600 601 if (!kvm_enabled() || !kvm_dirty_ring_enabled()) { 602 error_setg(errp, "dirty-limit requires KVM with accelerator" 603 " property 'dirty-ring-size' set"); 604 return false; 605 } 606 } 607 608 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 609 if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) { 610 error_setg(errp, "Multifd is not compatible with xbzrle"); 611 return false; 612 } 613 } 614 615 if (new_caps[MIGRATION_CAPABILITY_MAPPED_RAM]) { 616 if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) { 617 error_setg(errp, 618 "Mapped-ram migration is incompatible with xbzrle"); 619 return false; 620 } 621 622 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 623 error_setg(errp, 624 "Mapped-ram migration is incompatible with postcopy"); 625 return false; 626 } 627 } 628 629 /* 630 * On destination side, check the cases that capability is being set 631 * after incoming thread has started. 632 */ 633 if (migrate_rdma() && !migrate_rdma_caps_check(new_caps, errp)) { 634 return false; 635 } 636 return true; 637 } 638 639 MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) 640 { 641 MigrationCapabilityStatusList *head = NULL, **tail = &head; 642 MigrationCapabilityStatus *caps; 643 MigrationState *s = migrate_get_current(); 644 int i; 645 646 for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { 647 caps = g_malloc0(sizeof(*caps)); 648 caps->capability = i; 649 caps->state = s->capabilities[i]; 650 QAPI_LIST_APPEND(tail, caps); 651 } 652 653 return head; 654 } 655 656 void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, 657 Error **errp) 658 { 659 MigrationState *s = migrate_get_current(); 660 MigrationCapabilityStatusList *cap; 661 bool new_caps[MIGRATION_CAPABILITY__MAX]; 662 663 if (migration_is_running() || migration_in_colo_state()) { 664 error_setg(errp, "There's a migration process in progress"); 665 return; 666 } 667 668 memcpy(new_caps, s->capabilities, sizeof(new_caps)); 669 for (cap = params; cap; cap = cap->next) { 670 new_caps[cap->value->capability] = cap->value->state; 671 } 672 673 if (!migrate_caps_check(s->capabilities, new_caps, errp)) { 674 return; 675 } 676 677 for (cap = params; cap; cap = cap->next) { 678 s->capabilities[cap->value->capability] = cap->value->state; 679 } 680 } 681 682 /* parameters */ 683 684 const BitmapMigrationNodeAliasList *migrate_block_bitmap_mapping(void) 685 { 686 MigrationState *s = migrate_get_current(); 687 688 return s->parameters.block_bitmap_mapping; 689 } 690 691 bool migrate_has_block_bitmap_mapping(void) 692 { 693 MigrationState *s = migrate_get_current(); 694 695 return s->parameters.has_block_bitmap_mapping; 696 } 697 698 uint32_t migrate_checkpoint_delay(void) 699 { 700 MigrationState *s = migrate_get_current(); 701 702 return s->parameters.x_checkpoint_delay; 703 } 704 705 uint8_t migrate_cpu_throttle_increment(void) 706 { 707 MigrationState *s = migrate_get_current(); 708 709 return s->parameters.cpu_throttle_increment; 710 } 711 712 uint8_t migrate_cpu_throttle_initial(void) 713 { 714 MigrationState *s = migrate_get_current(); 715 716 return s->parameters.cpu_throttle_initial; 717 } 718 719 bool migrate_cpu_throttle_tailslow(void) 720 { 721 MigrationState *s = migrate_get_current(); 722 723 return s->parameters.cpu_throttle_tailslow; 724 } 725 726 bool migrate_direct_io(void) 727 { 728 MigrationState *s = migrate_get_current(); 729 730 /* 731 * O_DIRECT is only supported with mapped-ram and multifd. 732 * 733 * mapped-ram is needed because filesystems impose restrictions on 734 * O_DIRECT IO alignment (see MAPPED_RAM_FILE_OFFSET_ALIGNMENT). 735 * 736 * multifd is needed to keep the unaligned portion of the stream 737 * isolated to the main migration thread while multifd channels 738 * process the aligned data with O_DIRECT enabled. 739 */ 740 return s->parameters.direct_io && 741 s->capabilities[MIGRATION_CAPABILITY_MAPPED_RAM] && 742 s->capabilities[MIGRATION_CAPABILITY_MULTIFD]; 743 } 744 745 uint64_t migrate_downtime_limit(void) 746 { 747 MigrationState *s = migrate_get_current(); 748 749 return s->parameters.downtime_limit; 750 } 751 752 uint8_t migrate_max_cpu_throttle(void) 753 { 754 MigrationState *s = migrate_get_current(); 755 756 return s->parameters.max_cpu_throttle; 757 } 758 759 uint64_t migrate_max_bandwidth(void) 760 { 761 MigrationState *s = migrate_get_current(); 762 763 return s->parameters.max_bandwidth; 764 } 765 766 uint64_t migrate_avail_switchover_bandwidth(void) 767 { 768 MigrationState *s = migrate_get_current(); 769 770 return s->parameters.avail_switchover_bandwidth; 771 } 772 773 uint64_t migrate_max_postcopy_bandwidth(void) 774 { 775 MigrationState *s = migrate_get_current(); 776 777 return s->parameters.max_postcopy_bandwidth; 778 } 779 780 MigMode migrate_mode(void) 781 { 782 MigMode mode = cpr_get_incoming_mode(); 783 784 if (mode == MIG_MODE_NONE) { 785 mode = migrate_get_current()->parameters.mode; 786 } 787 788 assert(mode >= 0 && mode < MIG_MODE__MAX); 789 return mode; 790 } 791 792 int migrate_multifd_channels(void) 793 { 794 MigrationState *s = migrate_get_current(); 795 796 return s->parameters.multifd_channels; 797 } 798 799 MultiFDCompression migrate_multifd_compression(void) 800 { 801 MigrationState *s = migrate_get_current(); 802 803 assert(s->parameters.multifd_compression < MULTIFD_COMPRESSION__MAX); 804 return s->parameters.multifd_compression; 805 } 806 807 int migrate_multifd_zlib_level(void) 808 { 809 MigrationState *s = migrate_get_current(); 810 811 return s->parameters.multifd_zlib_level; 812 } 813 814 int migrate_multifd_qatzip_level(void) 815 { 816 MigrationState *s = migrate_get_current(); 817 818 return s->parameters.multifd_qatzip_level; 819 } 820 821 int migrate_multifd_zstd_level(void) 822 { 823 MigrationState *s = migrate_get_current(); 824 825 return s->parameters.multifd_zstd_level; 826 } 827 828 uint8_t migrate_throttle_trigger_threshold(void) 829 { 830 MigrationState *s = migrate_get_current(); 831 832 return s->parameters.throttle_trigger_threshold; 833 } 834 835 const char *migrate_tls_authz(void) 836 { 837 MigrationState *s = migrate_get_current(); 838 839 return s->parameters.tls_authz; 840 } 841 842 const char *migrate_tls_creds(void) 843 { 844 MigrationState *s = migrate_get_current(); 845 846 return s->parameters.tls_creds; 847 } 848 849 const char *migrate_tls_hostname(void) 850 { 851 MigrationState *s = migrate_get_current(); 852 853 return s->parameters.tls_hostname; 854 } 855 856 uint64_t migrate_vcpu_dirty_limit_period(void) 857 { 858 MigrationState *s = migrate_get_current(); 859 860 return s->parameters.x_vcpu_dirty_limit_period; 861 } 862 863 uint64_t migrate_xbzrle_cache_size(void) 864 { 865 MigrationState *s = migrate_get_current(); 866 867 return s->parameters.xbzrle_cache_size; 868 } 869 870 ZeroPageDetection migrate_zero_page_detection(void) 871 { 872 MigrationState *s = migrate_get_current(); 873 874 return s->parameters.zero_page_detection; 875 } 876 877 /* parameters helpers */ 878 879 AnnounceParameters *migrate_announce_params(void) 880 { 881 static AnnounceParameters ap; 882 883 MigrationState *s = migrate_get_current(); 884 885 ap.initial = s->parameters.announce_initial; 886 ap.max = s->parameters.announce_max; 887 ap.rounds = s->parameters.announce_rounds; 888 ap.step = s->parameters.announce_step; 889 890 return ≈ 891 } 892 893 MigrationParameters *qmp_query_migrate_parameters(Error **errp) 894 { 895 MigrationParameters *params; 896 MigrationState *s = migrate_get_current(); 897 898 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 899 params = g_malloc0(sizeof(*params)); 900 params->has_throttle_trigger_threshold = true; 901 params->throttle_trigger_threshold = s->parameters.throttle_trigger_threshold; 902 params->has_cpu_throttle_initial = true; 903 params->cpu_throttle_initial = s->parameters.cpu_throttle_initial; 904 params->has_cpu_throttle_increment = true; 905 params->cpu_throttle_increment = s->parameters.cpu_throttle_increment; 906 params->has_cpu_throttle_tailslow = true; 907 params->cpu_throttle_tailslow = s->parameters.cpu_throttle_tailslow; 908 params->tls_creds = g_strdup(s->parameters.tls_creds); 909 params->tls_hostname = g_strdup(s->parameters.tls_hostname); 910 params->tls_authz = g_strdup(s->parameters.tls_authz ? 911 s->parameters.tls_authz : ""); 912 params->has_max_bandwidth = true; 913 params->max_bandwidth = s->parameters.max_bandwidth; 914 params->has_avail_switchover_bandwidth = true; 915 params->avail_switchover_bandwidth = s->parameters.avail_switchover_bandwidth; 916 params->has_downtime_limit = true; 917 params->downtime_limit = s->parameters.downtime_limit; 918 params->has_x_checkpoint_delay = true; 919 params->x_checkpoint_delay = s->parameters.x_checkpoint_delay; 920 params->has_multifd_channels = true; 921 params->multifd_channels = s->parameters.multifd_channels; 922 params->has_multifd_compression = true; 923 params->multifd_compression = s->parameters.multifd_compression; 924 params->has_multifd_zlib_level = true; 925 params->multifd_zlib_level = s->parameters.multifd_zlib_level; 926 params->has_multifd_qatzip_level = true; 927 params->multifd_qatzip_level = s->parameters.multifd_qatzip_level; 928 params->has_multifd_zstd_level = true; 929 params->multifd_zstd_level = s->parameters.multifd_zstd_level; 930 params->has_xbzrle_cache_size = true; 931 params->xbzrle_cache_size = s->parameters.xbzrle_cache_size; 932 params->has_max_postcopy_bandwidth = true; 933 params->max_postcopy_bandwidth = s->parameters.max_postcopy_bandwidth; 934 params->has_max_cpu_throttle = true; 935 params->max_cpu_throttle = s->parameters.max_cpu_throttle; 936 params->has_announce_initial = true; 937 params->announce_initial = s->parameters.announce_initial; 938 params->has_announce_max = true; 939 params->announce_max = s->parameters.announce_max; 940 params->has_announce_rounds = true; 941 params->announce_rounds = s->parameters.announce_rounds; 942 params->has_announce_step = true; 943 params->announce_step = s->parameters.announce_step; 944 945 if (s->parameters.has_block_bitmap_mapping) { 946 params->has_block_bitmap_mapping = true; 947 params->block_bitmap_mapping = 948 QAPI_CLONE(BitmapMigrationNodeAliasList, 949 s->parameters.block_bitmap_mapping); 950 } 951 952 params->has_x_vcpu_dirty_limit_period = true; 953 params->x_vcpu_dirty_limit_period = s->parameters.x_vcpu_dirty_limit_period; 954 params->has_vcpu_dirty_limit = true; 955 params->vcpu_dirty_limit = s->parameters.vcpu_dirty_limit; 956 params->has_mode = true; 957 params->mode = s->parameters.mode; 958 params->has_zero_page_detection = true; 959 params->zero_page_detection = s->parameters.zero_page_detection; 960 params->has_direct_io = true; 961 params->direct_io = s->parameters.direct_io; 962 963 return params; 964 } 965 966 void migrate_params_init(MigrationParameters *params) 967 { 968 params->tls_hostname = g_strdup(""); 969 params->tls_creds = g_strdup(""); 970 971 /* Set has_* up only for parameter checks */ 972 params->has_throttle_trigger_threshold = true; 973 params->has_cpu_throttle_initial = true; 974 params->has_cpu_throttle_increment = true; 975 params->has_cpu_throttle_tailslow = true; 976 params->has_max_bandwidth = true; 977 params->has_downtime_limit = true; 978 params->has_x_checkpoint_delay = true; 979 params->has_multifd_channels = true; 980 params->has_multifd_compression = true; 981 params->has_multifd_zlib_level = true; 982 params->has_multifd_qatzip_level = true; 983 params->has_multifd_zstd_level = true; 984 params->has_xbzrle_cache_size = true; 985 params->has_max_postcopy_bandwidth = true; 986 params->has_max_cpu_throttle = true; 987 params->has_announce_initial = true; 988 params->has_announce_max = true; 989 params->has_announce_rounds = true; 990 params->has_announce_step = true; 991 params->has_x_vcpu_dirty_limit_period = true; 992 params->has_vcpu_dirty_limit = true; 993 params->has_mode = true; 994 params->has_zero_page_detection = true; 995 params->has_direct_io = true; 996 } 997 998 /* 999 * Check whether the parameters are valid. Error will be put into errp 1000 * (if provided). Return true if valid, otherwise false. 1001 */ 1002 bool migrate_params_check(MigrationParameters *params, Error **errp) 1003 { 1004 ERRP_GUARD(); 1005 1006 if (params->has_throttle_trigger_threshold && 1007 (params->throttle_trigger_threshold < 1 || 1008 params->throttle_trigger_threshold > 100)) { 1009 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1010 "throttle_trigger_threshold", 1011 "an integer in the range of 1 to 100"); 1012 return false; 1013 } 1014 1015 if (params->has_cpu_throttle_initial && 1016 (params->cpu_throttle_initial < 1 || 1017 params->cpu_throttle_initial > 99)) { 1018 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1019 "cpu_throttle_initial", 1020 "an integer in the range of 1 to 99"); 1021 return false; 1022 } 1023 1024 if (params->has_cpu_throttle_increment && 1025 (params->cpu_throttle_increment < 1 || 1026 params->cpu_throttle_increment > 99)) { 1027 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1028 "cpu_throttle_increment", 1029 "an integer in the range of 1 to 99"); 1030 return false; 1031 } 1032 1033 if (params->has_max_bandwidth && (params->max_bandwidth > SIZE_MAX)) { 1034 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1035 "max_bandwidth", 1036 "an integer in the range of 0 to "stringify(SIZE_MAX) 1037 " bytes/second"); 1038 return false; 1039 } 1040 1041 if (params->has_avail_switchover_bandwidth && 1042 (params->avail_switchover_bandwidth > SIZE_MAX)) { 1043 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1044 "avail_switchover_bandwidth", 1045 "an integer in the range of 0 to "stringify(SIZE_MAX) 1046 " bytes/second"); 1047 return false; 1048 } 1049 1050 if (params->has_downtime_limit && 1051 (params->downtime_limit > MAX_MIGRATE_DOWNTIME)) { 1052 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1053 "downtime_limit", 1054 "an integer in the range of 0 to " 1055 stringify(MAX_MIGRATE_DOWNTIME)" ms"); 1056 return false; 1057 } 1058 1059 /* x_checkpoint_delay is now always positive */ 1060 1061 if (params->has_multifd_channels && (params->multifd_channels < 1)) { 1062 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1063 "multifd_channels", 1064 "a value between 1 and 255"); 1065 return false; 1066 } 1067 1068 if (params->has_multifd_zlib_level && 1069 (params->multifd_zlib_level > 9)) { 1070 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zlib_level", 1071 "a value between 0 and 9"); 1072 return false; 1073 } 1074 1075 if (params->has_multifd_qatzip_level && 1076 ((params->multifd_qatzip_level > 9) || 1077 (params->multifd_qatzip_level < 1))) { 1078 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_qatzip_level", 1079 "a value between 1 and 9"); 1080 return false; 1081 } 1082 1083 if (params->has_multifd_zstd_level && 1084 (params->multifd_zstd_level > 20)) { 1085 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zstd_level", 1086 "a value between 0 and 20"); 1087 return false; 1088 } 1089 1090 if (params->has_xbzrle_cache_size && 1091 (params->xbzrle_cache_size < qemu_target_page_size() || 1092 !is_power_of_2(params->xbzrle_cache_size))) { 1093 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1094 "xbzrle_cache_size", 1095 "a power of two no less than the target page size"); 1096 return false; 1097 } 1098 1099 if (params->has_max_cpu_throttle && 1100 (params->max_cpu_throttle < params->cpu_throttle_initial || 1101 params->max_cpu_throttle > 99)) { 1102 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1103 "max_cpu_throttle", 1104 "an integer in the range of cpu_throttle_initial to 99"); 1105 return false; 1106 } 1107 1108 if (params->has_announce_initial && 1109 params->announce_initial > 100000) { 1110 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1111 "announce_initial", 1112 "a value between 0 and 100000"); 1113 return false; 1114 } 1115 if (params->has_announce_max && 1116 params->announce_max > 100000) { 1117 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1118 "announce_max", 1119 "a value between 0 and 100000"); 1120 return false; 1121 } 1122 if (params->has_announce_rounds && 1123 params->announce_rounds > 1000) { 1124 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1125 "announce_rounds", 1126 "a value between 0 and 1000"); 1127 return false; 1128 } 1129 if (params->has_announce_step && 1130 (params->announce_step < 1 || 1131 params->announce_step > 10000)) { 1132 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1133 "announce_step", 1134 "a value between 0 and 10000"); 1135 return false; 1136 } 1137 1138 if (params->has_block_bitmap_mapping && 1139 !check_dirty_bitmap_mig_alias_map(params->block_bitmap_mapping, errp)) { 1140 error_prepend(errp, "Invalid mapping given for block-bitmap-mapping: "); 1141 return false; 1142 } 1143 1144 #ifdef CONFIG_LINUX 1145 if (migrate_zero_copy_send() && 1146 ((params->has_multifd_compression && params->multifd_compression) || 1147 (params->tls_creds && *params->tls_creds))) { 1148 error_setg(errp, 1149 "Zero copy only available for non-compressed non-TLS multifd migration"); 1150 return false; 1151 } 1152 #endif 1153 1154 if (migrate_mapped_ram() && 1155 (migrate_multifd_compression() || migrate_tls())) { 1156 error_setg(errp, 1157 "Mapped-ram only available for non-compressed non-TLS multifd migration"); 1158 return false; 1159 } 1160 1161 if (params->has_x_vcpu_dirty_limit_period && 1162 (params->x_vcpu_dirty_limit_period < 1 || 1163 params->x_vcpu_dirty_limit_period > 1000)) { 1164 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1165 "x-vcpu-dirty-limit-period", 1166 "a value between 1 and 1000"); 1167 return false; 1168 } 1169 1170 if (params->has_vcpu_dirty_limit && 1171 (params->vcpu_dirty_limit < 1)) { 1172 error_setg(errp, 1173 "Parameter 'vcpu_dirty_limit' must be greater than 1 MB/s"); 1174 return false; 1175 } 1176 1177 if (params->has_direct_io && params->direct_io && !qemu_has_direct_io()) { 1178 error_setg(errp, "No build-time support for direct-io"); 1179 return false; 1180 } 1181 1182 return true; 1183 } 1184 1185 static void migrate_params_test_apply(MigrateSetParameters *params, 1186 MigrationParameters *dest) 1187 { 1188 *dest = migrate_get_current()->parameters; 1189 1190 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 1191 1192 if (params->has_throttle_trigger_threshold) { 1193 dest->throttle_trigger_threshold = params->throttle_trigger_threshold; 1194 } 1195 1196 if (params->has_cpu_throttle_initial) { 1197 dest->cpu_throttle_initial = params->cpu_throttle_initial; 1198 } 1199 1200 if (params->has_cpu_throttle_increment) { 1201 dest->cpu_throttle_increment = params->cpu_throttle_increment; 1202 } 1203 1204 if (params->has_cpu_throttle_tailslow) { 1205 dest->cpu_throttle_tailslow = params->cpu_throttle_tailslow; 1206 } 1207 1208 if (params->tls_creds) { 1209 assert(params->tls_creds->type == QTYPE_QSTRING); 1210 dest->tls_creds = params->tls_creds->u.s; 1211 } 1212 1213 if (params->tls_hostname) { 1214 assert(params->tls_hostname->type == QTYPE_QSTRING); 1215 dest->tls_hostname = params->tls_hostname->u.s; 1216 } 1217 1218 if (params->tls_authz) { 1219 assert(params->tls_authz->type == QTYPE_QSTRING); 1220 dest->tls_authz = params->tls_authz->u.s; 1221 } 1222 1223 if (params->has_max_bandwidth) { 1224 dest->max_bandwidth = params->max_bandwidth; 1225 } 1226 1227 if (params->has_avail_switchover_bandwidth) { 1228 dest->avail_switchover_bandwidth = params->avail_switchover_bandwidth; 1229 } 1230 1231 if (params->has_downtime_limit) { 1232 dest->downtime_limit = params->downtime_limit; 1233 } 1234 1235 if (params->has_x_checkpoint_delay) { 1236 dest->x_checkpoint_delay = params->x_checkpoint_delay; 1237 } 1238 1239 if (params->has_multifd_channels) { 1240 dest->multifd_channels = params->multifd_channels; 1241 } 1242 if (params->has_multifd_compression) { 1243 dest->multifd_compression = params->multifd_compression; 1244 } 1245 if (params->has_multifd_qatzip_level) { 1246 dest->multifd_qatzip_level = params->multifd_qatzip_level; 1247 } 1248 if (params->has_multifd_zlib_level) { 1249 dest->multifd_zlib_level = params->multifd_zlib_level; 1250 } 1251 if (params->has_multifd_zstd_level) { 1252 dest->multifd_zstd_level = params->multifd_zstd_level; 1253 } 1254 if (params->has_xbzrle_cache_size) { 1255 dest->xbzrle_cache_size = params->xbzrle_cache_size; 1256 } 1257 if (params->has_max_postcopy_bandwidth) { 1258 dest->max_postcopy_bandwidth = params->max_postcopy_bandwidth; 1259 } 1260 if (params->has_max_cpu_throttle) { 1261 dest->max_cpu_throttle = params->max_cpu_throttle; 1262 } 1263 if (params->has_announce_initial) { 1264 dest->announce_initial = params->announce_initial; 1265 } 1266 if (params->has_announce_max) { 1267 dest->announce_max = params->announce_max; 1268 } 1269 if (params->has_announce_rounds) { 1270 dest->announce_rounds = params->announce_rounds; 1271 } 1272 if (params->has_announce_step) { 1273 dest->announce_step = params->announce_step; 1274 } 1275 1276 if (params->has_block_bitmap_mapping) { 1277 dest->has_block_bitmap_mapping = true; 1278 dest->block_bitmap_mapping = params->block_bitmap_mapping; 1279 } 1280 1281 if (params->has_x_vcpu_dirty_limit_period) { 1282 dest->x_vcpu_dirty_limit_period = 1283 params->x_vcpu_dirty_limit_period; 1284 } 1285 if (params->has_vcpu_dirty_limit) { 1286 dest->vcpu_dirty_limit = params->vcpu_dirty_limit; 1287 } 1288 1289 if (params->has_mode) { 1290 dest->mode = params->mode; 1291 } 1292 1293 if (params->has_zero_page_detection) { 1294 dest->zero_page_detection = params->zero_page_detection; 1295 } 1296 1297 if (params->has_direct_io) { 1298 dest->direct_io = params->direct_io; 1299 } 1300 } 1301 1302 static void migrate_params_apply(MigrateSetParameters *params, Error **errp) 1303 { 1304 MigrationState *s = migrate_get_current(); 1305 1306 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 1307 1308 if (params->has_throttle_trigger_threshold) { 1309 s->parameters.throttle_trigger_threshold = params->throttle_trigger_threshold; 1310 } 1311 1312 if (params->has_cpu_throttle_initial) { 1313 s->parameters.cpu_throttle_initial = params->cpu_throttle_initial; 1314 } 1315 1316 if (params->has_cpu_throttle_increment) { 1317 s->parameters.cpu_throttle_increment = params->cpu_throttle_increment; 1318 } 1319 1320 if (params->has_cpu_throttle_tailslow) { 1321 s->parameters.cpu_throttle_tailslow = params->cpu_throttle_tailslow; 1322 } 1323 1324 if (params->tls_creds) { 1325 g_free(s->parameters.tls_creds); 1326 assert(params->tls_creds->type == QTYPE_QSTRING); 1327 s->parameters.tls_creds = g_strdup(params->tls_creds->u.s); 1328 } 1329 1330 if (params->tls_hostname) { 1331 g_free(s->parameters.tls_hostname); 1332 assert(params->tls_hostname->type == QTYPE_QSTRING); 1333 s->parameters.tls_hostname = g_strdup(params->tls_hostname->u.s); 1334 } 1335 1336 if (params->tls_authz) { 1337 g_free(s->parameters.tls_authz); 1338 assert(params->tls_authz->type == QTYPE_QSTRING); 1339 s->parameters.tls_authz = g_strdup(params->tls_authz->u.s); 1340 } 1341 1342 if (params->has_max_bandwidth) { 1343 s->parameters.max_bandwidth = params->max_bandwidth; 1344 if (s->to_dst_file && !migration_in_postcopy()) { 1345 migration_rate_set(s->parameters.max_bandwidth); 1346 } 1347 } 1348 1349 if (params->has_avail_switchover_bandwidth) { 1350 s->parameters.avail_switchover_bandwidth = params->avail_switchover_bandwidth; 1351 } 1352 1353 if (params->has_downtime_limit) { 1354 s->parameters.downtime_limit = params->downtime_limit; 1355 } 1356 1357 if (params->has_x_checkpoint_delay) { 1358 s->parameters.x_checkpoint_delay = params->x_checkpoint_delay; 1359 colo_checkpoint_delay_set(); 1360 } 1361 1362 if (params->has_multifd_channels) { 1363 s->parameters.multifd_channels = params->multifd_channels; 1364 } 1365 if (params->has_multifd_compression) { 1366 s->parameters.multifd_compression = params->multifd_compression; 1367 } 1368 if (params->has_multifd_qatzip_level) { 1369 s->parameters.multifd_qatzip_level = params->multifd_qatzip_level; 1370 } 1371 if (params->has_multifd_zlib_level) { 1372 s->parameters.multifd_zlib_level = params->multifd_zlib_level; 1373 } 1374 if (params->has_multifd_zstd_level) { 1375 s->parameters.multifd_zstd_level = params->multifd_zstd_level; 1376 } 1377 if (params->has_xbzrle_cache_size) { 1378 s->parameters.xbzrle_cache_size = params->xbzrle_cache_size; 1379 xbzrle_cache_resize(params->xbzrle_cache_size, errp); 1380 } 1381 if (params->has_max_postcopy_bandwidth) { 1382 s->parameters.max_postcopy_bandwidth = params->max_postcopy_bandwidth; 1383 if (s->to_dst_file && migration_in_postcopy()) { 1384 migration_rate_set(s->parameters.max_postcopy_bandwidth); 1385 } 1386 } 1387 if (params->has_max_cpu_throttle) { 1388 s->parameters.max_cpu_throttle = params->max_cpu_throttle; 1389 } 1390 if (params->has_announce_initial) { 1391 s->parameters.announce_initial = params->announce_initial; 1392 } 1393 if (params->has_announce_max) { 1394 s->parameters.announce_max = params->announce_max; 1395 } 1396 if (params->has_announce_rounds) { 1397 s->parameters.announce_rounds = params->announce_rounds; 1398 } 1399 if (params->has_announce_step) { 1400 s->parameters.announce_step = params->announce_step; 1401 } 1402 1403 if (params->has_block_bitmap_mapping) { 1404 qapi_free_BitmapMigrationNodeAliasList( 1405 s->parameters.block_bitmap_mapping); 1406 1407 s->parameters.has_block_bitmap_mapping = true; 1408 s->parameters.block_bitmap_mapping = 1409 QAPI_CLONE(BitmapMigrationNodeAliasList, 1410 params->block_bitmap_mapping); 1411 } 1412 1413 if (params->has_x_vcpu_dirty_limit_period) { 1414 s->parameters.x_vcpu_dirty_limit_period = 1415 params->x_vcpu_dirty_limit_period; 1416 } 1417 if (params->has_vcpu_dirty_limit) { 1418 s->parameters.vcpu_dirty_limit = params->vcpu_dirty_limit; 1419 } 1420 1421 if (params->has_mode) { 1422 s->parameters.mode = params->mode; 1423 } 1424 1425 if (params->has_zero_page_detection) { 1426 s->parameters.zero_page_detection = params->zero_page_detection; 1427 } 1428 1429 if (params->has_direct_io) { 1430 s->parameters.direct_io = params->direct_io; 1431 } 1432 } 1433 1434 void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp) 1435 { 1436 MigrationParameters tmp; 1437 1438 /* TODO Rewrite "" to null instead for all three tls_* parameters */ 1439 if (params->tls_creds 1440 && params->tls_creds->type == QTYPE_QNULL) { 1441 qobject_unref(params->tls_creds->u.n); 1442 params->tls_creds->type = QTYPE_QSTRING; 1443 params->tls_creds->u.s = strdup(""); 1444 } 1445 if (params->tls_hostname 1446 && params->tls_hostname->type == QTYPE_QNULL) { 1447 qobject_unref(params->tls_hostname->u.n); 1448 params->tls_hostname->type = QTYPE_QSTRING; 1449 params->tls_hostname->u.s = strdup(""); 1450 } 1451 if (params->tls_authz 1452 && params->tls_authz->type == QTYPE_QNULL) { 1453 qobject_unref(params->tls_authz->u.n); 1454 params->tls_authz->type = QTYPE_QSTRING; 1455 params->tls_authz->u.s = strdup(""); 1456 } 1457 1458 migrate_params_test_apply(params, &tmp); 1459 1460 if (!migrate_params_check(&tmp, errp)) { 1461 /* Invalid parameter */ 1462 return; 1463 } 1464 1465 migrate_params_apply(params, errp); 1466 } 1467