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