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_SIZE("avail-switchover-bandwidth", MigrationState, 129 parameters.avail_switchover_bandwidth, 0), 130 DEFINE_PROP_UINT64("x-downtime-limit", MigrationState, 131 parameters.downtime_limit, 132 DEFAULT_MIGRATE_SET_DOWNTIME), 133 DEFINE_PROP_UINT32("x-checkpoint-delay", MigrationState, 134 parameters.x_checkpoint_delay, 135 DEFAULT_MIGRATE_X_CHECKPOINT_DELAY), 136 DEFINE_PROP_UINT8("multifd-channels", MigrationState, 137 parameters.multifd_channels, 138 DEFAULT_MIGRATE_MULTIFD_CHANNELS), 139 DEFINE_PROP_MULTIFD_COMPRESSION("multifd-compression", MigrationState, 140 parameters.multifd_compression, 141 DEFAULT_MIGRATE_MULTIFD_COMPRESSION), 142 DEFINE_PROP_UINT8("multifd-zlib-level", MigrationState, 143 parameters.multifd_zlib_level, 144 DEFAULT_MIGRATE_MULTIFD_ZLIB_LEVEL), 145 DEFINE_PROP_UINT8("multifd-zstd-level", MigrationState, 146 parameters.multifd_zstd_level, 147 DEFAULT_MIGRATE_MULTIFD_ZSTD_LEVEL), 148 DEFINE_PROP_SIZE("xbzrle-cache-size", MigrationState, 149 parameters.xbzrle_cache_size, 150 DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE), 151 DEFINE_PROP_SIZE("max-postcopy-bandwidth", MigrationState, 152 parameters.max_postcopy_bandwidth, 153 DEFAULT_MIGRATE_MAX_POSTCOPY_BANDWIDTH), 154 DEFINE_PROP_UINT8("max-cpu-throttle", MigrationState, 155 parameters.max_cpu_throttle, 156 DEFAULT_MIGRATE_MAX_CPU_THROTTLE), 157 DEFINE_PROP_SIZE("announce-initial", MigrationState, 158 parameters.announce_initial, 159 DEFAULT_MIGRATE_ANNOUNCE_INITIAL), 160 DEFINE_PROP_SIZE("announce-max", MigrationState, 161 parameters.announce_max, 162 DEFAULT_MIGRATE_ANNOUNCE_MAX), 163 DEFINE_PROP_SIZE("announce-rounds", MigrationState, 164 parameters.announce_rounds, 165 DEFAULT_MIGRATE_ANNOUNCE_ROUNDS), 166 DEFINE_PROP_SIZE("announce-step", MigrationState, 167 parameters.announce_step, 168 DEFAULT_MIGRATE_ANNOUNCE_STEP), 169 DEFINE_PROP_STRING("tls-creds", MigrationState, parameters.tls_creds), 170 DEFINE_PROP_STRING("tls-hostname", MigrationState, parameters.tls_hostname), 171 DEFINE_PROP_STRING("tls-authz", MigrationState, parameters.tls_authz), 172 DEFINE_PROP_UINT64("x-vcpu-dirty-limit-period", MigrationState, 173 parameters.x_vcpu_dirty_limit_period, 174 DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT_PERIOD), 175 DEFINE_PROP_UINT64("vcpu-dirty-limit", MigrationState, 176 parameters.vcpu_dirty_limit, 177 DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT), 178 179 /* Migration capabilities */ 180 DEFINE_PROP_MIG_CAP("x-xbzrle", MIGRATION_CAPABILITY_XBZRLE), 181 DEFINE_PROP_MIG_CAP("x-rdma-pin-all", MIGRATION_CAPABILITY_RDMA_PIN_ALL), 182 DEFINE_PROP_MIG_CAP("x-auto-converge", MIGRATION_CAPABILITY_AUTO_CONVERGE), 183 DEFINE_PROP_MIG_CAP("x-zero-blocks", MIGRATION_CAPABILITY_ZERO_BLOCKS), 184 DEFINE_PROP_MIG_CAP("x-compress", MIGRATION_CAPABILITY_COMPRESS), 185 DEFINE_PROP_MIG_CAP("x-events", MIGRATION_CAPABILITY_EVENTS), 186 DEFINE_PROP_MIG_CAP("x-postcopy-ram", MIGRATION_CAPABILITY_POSTCOPY_RAM), 187 DEFINE_PROP_MIG_CAP("x-postcopy-preempt", 188 MIGRATION_CAPABILITY_POSTCOPY_PREEMPT), 189 DEFINE_PROP_MIG_CAP("x-colo", MIGRATION_CAPABILITY_X_COLO), 190 DEFINE_PROP_MIG_CAP("x-release-ram", MIGRATION_CAPABILITY_RELEASE_RAM), 191 DEFINE_PROP_MIG_CAP("x-block", MIGRATION_CAPABILITY_BLOCK), 192 DEFINE_PROP_MIG_CAP("x-return-path", MIGRATION_CAPABILITY_RETURN_PATH), 193 DEFINE_PROP_MIG_CAP("x-multifd", MIGRATION_CAPABILITY_MULTIFD), 194 DEFINE_PROP_MIG_CAP("x-background-snapshot", 195 MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT), 196 #ifdef CONFIG_LINUX 197 DEFINE_PROP_MIG_CAP("x-zero-copy-send", 198 MIGRATION_CAPABILITY_ZERO_COPY_SEND), 199 #endif 200 DEFINE_PROP_MIG_CAP("x-switchover-ack", 201 MIGRATION_CAPABILITY_SWITCHOVER_ACK), 202 DEFINE_PROP_MIG_CAP("x-dirty-limit", MIGRATION_CAPABILITY_DIRTY_LIMIT), 203 DEFINE_PROP_END_OF_LIST(), 204 }; 205 206 bool migrate_auto_converge(void) 207 { 208 MigrationState *s = migrate_get_current(); 209 210 return s->capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; 211 } 212 213 bool migrate_background_snapshot(void) 214 { 215 MigrationState *s = migrate_get_current(); 216 217 return s->capabilities[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]; 218 } 219 220 bool migrate_block(void) 221 { 222 MigrationState *s = migrate_get_current(); 223 224 return s->capabilities[MIGRATION_CAPABILITY_BLOCK]; 225 } 226 227 bool migrate_colo(void) 228 { 229 MigrationState *s = migrate_get_current(); 230 231 return s->capabilities[MIGRATION_CAPABILITY_X_COLO]; 232 } 233 234 bool migrate_compress(void) 235 { 236 MigrationState *s = migrate_get_current(); 237 238 return s->capabilities[MIGRATION_CAPABILITY_COMPRESS]; 239 } 240 241 bool migrate_dirty_bitmaps(void) 242 { 243 MigrationState *s = migrate_get_current(); 244 245 return s->capabilities[MIGRATION_CAPABILITY_DIRTY_BITMAPS]; 246 } 247 248 bool migrate_dirty_limit(void) 249 { 250 MigrationState *s = migrate_get_current(); 251 252 return s->capabilities[MIGRATION_CAPABILITY_DIRTY_LIMIT]; 253 } 254 255 bool migrate_events(void) 256 { 257 MigrationState *s = migrate_get_current(); 258 259 return s->capabilities[MIGRATION_CAPABILITY_EVENTS]; 260 } 261 262 bool migrate_ignore_shared(void) 263 { 264 MigrationState *s = migrate_get_current(); 265 266 return s->capabilities[MIGRATION_CAPABILITY_X_IGNORE_SHARED]; 267 } 268 269 bool migrate_late_block_activate(void) 270 { 271 MigrationState *s = migrate_get_current(); 272 273 return s->capabilities[MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE]; 274 } 275 276 bool migrate_multifd(void) 277 { 278 MigrationState *s = migrate_get_current(); 279 280 return s->capabilities[MIGRATION_CAPABILITY_MULTIFD]; 281 } 282 283 bool migrate_pause_before_switchover(void) 284 { 285 MigrationState *s = migrate_get_current(); 286 287 return s->capabilities[MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER]; 288 } 289 290 bool migrate_postcopy_blocktime(void) 291 { 292 MigrationState *s = migrate_get_current(); 293 294 return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME]; 295 } 296 297 bool migrate_postcopy_preempt(void) 298 { 299 MigrationState *s = migrate_get_current(); 300 301 return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT]; 302 } 303 304 bool migrate_postcopy_ram(void) 305 { 306 MigrationState *s = migrate_get_current(); 307 308 return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM]; 309 } 310 311 bool migrate_rdma_pin_all(void) 312 { 313 MigrationState *s = migrate_get_current(); 314 315 return s->capabilities[MIGRATION_CAPABILITY_RDMA_PIN_ALL]; 316 } 317 318 bool migrate_release_ram(void) 319 { 320 MigrationState *s = migrate_get_current(); 321 322 return s->capabilities[MIGRATION_CAPABILITY_RELEASE_RAM]; 323 } 324 325 bool migrate_return_path(void) 326 { 327 MigrationState *s = migrate_get_current(); 328 329 return s->capabilities[MIGRATION_CAPABILITY_RETURN_PATH]; 330 } 331 332 bool migrate_switchover_ack(void) 333 { 334 MigrationState *s = migrate_get_current(); 335 336 return s->capabilities[MIGRATION_CAPABILITY_SWITCHOVER_ACK]; 337 } 338 339 bool migrate_validate_uuid(void) 340 { 341 MigrationState *s = migrate_get_current(); 342 343 return s->capabilities[MIGRATION_CAPABILITY_VALIDATE_UUID]; 344 } 345 346 bool migrate_xbzrle(void) 347 { 348 MigrationState *s = migrate_get_current(); 349 350 return s->capabilities[MIGRATION_CAPABILITY_XBZRLE]; 351 } 352 353 bool migrate_zero_blocks(void) 354 { 355 MigrationState *s = migrate_get_current(); 356 357 return s->capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS]; 358 } 359 360 bool migrate_zero_copy_send(void) 361 { 362 MigrationState *s = migrate_get_current(); 363 364 return s->capabilities[MIGRATION_CAPABILITY_ZERO_COPY_SEND]; 365 } 366 367 /* pseudo capabilities */ 368 369 bool migrate_multifd_flush_after_each_section(void) 370 { 371 MigrationState *s = migrate_get_current(); 372 373 return s->multifd_flush_after_each_section; 374 } 375 376 bool migrate_postcopy(void) 377 { 378 return migrate_postcopy_ram() || migrate_dirty_bitmaps(); 379 } 380 381 bool migrate_tls(void) 382 { 383 MigrationState *s = migrate_get_current(); 384 385 return s->parameters.tls_creds && *s->parameters.tls_creds; 386 } 387 388 typedef enum WriteTrackingSupport { 389 WT_SUPPORT_UNKNOWN = 0, 390 WT_SUPPORT_ABSENT, 391 WT_SUPPORT_AVAILABLE, 392 WT_SUPPORT_COMPATIBLE 393 } WriteTrackingSupport; 394 395 static 396 WriteTrackingSupport migrate_query_write_tracking(void) 397 { 398 /* Check if kernel supports required UFFD features */ 399 if (!ram_write_tracking_available()) { 400 return WT_SUPPORT_ABSENT; 401 } 402 /* 403 * Check if current memory configuration is 404 * compatible with required UFFD features. 405 */ 406 if (!ram_write_tracking_compatible()) { 407 return WT_SUPPORT_AVAILABLE; 408 } 409 410 return WT_SUPPORT_COMPATIBLE; 411 } 412 413 /* Migration capabilities set */ 414 struct MigrateCapsSet { 415 int size; /* Capability set size */ 416 MigrationCapability caps[]; /* Variadic array of capabilities */ 417 }; 418 typedef struct MigrateCapsSet MigrateCapsSet; 419 420 /* Define and initialize MigrateCapsSet */ 421 #define INITIALIZE_MIGRATE_CAPS_SET(_name, ...) \ 422 MigrateCapsSet _name = { \ 423 .size = sizeof((int []) { __VA_ARGS__ }) / sizeof(int), \ 424 .caps = { __VA_ARGS__ } \ 425 } 426 427 /* Background-snapshot compatibility check list */ 428 static const 429 INITIALIZE_MIGRATE_CAPS_SET(check_caps_background_snapshot, 430 MIGRATION_CAPABILITY_POSTCOPY_RAM, 431 MIGRATION_CAPABILITY_DIRTY_BITMAPS, 432 MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME, 433 MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE, 434 MIGRATION_CAPABILITY_RETURN_PATH, 435 MIGRATION_CAPABILITY_MULTIFD, 436 MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER, 437 MIGRATION_CAPABILITY_AUTO_CONVERGE, 438 MIGRATION_CAPABILITY_RELEASE_RAM, 439 MIGRATION_CAPABILITY_RDMA_PIN_ALL, 440 MIGRATION_CAPABILITY_COMPRESS, 441 MIGRATION_CAPABILITY_XBZRLE, 442 MIGRATION_CAPABILITY_X_COLO, 443 MIGRATION_CAPABILITY_VALIDATE_UUID, 444 MIGRATION_CAPABILITY_ZERO_COPY_SEND); 445 446 static bool migrate_incoming_started(void) 447 { 448 return !!migration_incoming_get_current()->transport_data; 449 } 450 451 /** 452 * @migration_caps_check - check capability compatibility 453 * 454 * @old_caps: old capability list 455 * @new_caps: new capability list 456 * @errp: set *errp if the check failed, with reason 457 * 458 * Returns true if check passed, otherwise false. 459 */ 460 bool migrate_caps_check(bool *old_caps, bool *new_caps, Error **errp) 461 { 462 MigrationIncomingState *mis = migration_incoming_get_current(); 463 464 ERRP_GUARD(); 465 #ifndef CONFIG_LIVE_BLOCK_MIGRATION 466 if (new_caps[MIGRATION_CAPABILITY_BLOCK]) { 467 error_setg(errp, "QEMU compiled without old-style (blk/-b, inc/-i) " 468 "block migration"); 469 error_append_hint(errp, "Use drive_mirror+NBD instead.\n"); 470 return false; 471 } 472 #endif 473 474 #ifndef CONFIG_REPLICATION 475 if (new_caps[MIGRATION_CAPABILITY_X_COLO]) { 476 error_setg(errp, "QEMU compiled without replication module" 477 " can't enable COLO"); 478 error_append_hint(errp, "Please enable replication before COLO.\n"); 479 return false; 480 } 481 #endif 482 483 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 484 /* This check is reasonably expensive, so only when it's being 485 * set the first time, also it's only the destination that needs 486 * special support. 487 */ 488 if (!old_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM] && 489 runstate_check(RUN_STATE_INMIGRATE) && 490 !postcopy_ram_supported_by_host(mis, errp)) { 491 error_prepend(errp, "Postcopy is not supported: "); 492 return false; 493 } 494 495 if (new_caps[MIGRATION_CAPABILITY_X_IGNORE_SHARED]) { 496 error_setg(errp, "Postcopy is not compatible with ignore-shared"); 497 return false; 498 } 499 500 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 501 error_setg(errp, "Postcopy is not yet compatible with multifd"); 502 return false; 503 } 504 } 505 506 if (new_caps[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]) { 507 WriteTrackingSupport wt_support; 508 int idx; 509 /* 510 * Check if 'background-snapshot' capability is supported by 511 * host kernel and compatible with guest memory configuration. 512 */ 513 wt_support = migrate_query_write_tracking(); 514 if (wt_support < WT_SUPPORT_AVAILABLE) { 515 error_setg(errp, "Background-snapshot is not supported by host kernel"); 516 return false; 517 } 518 if (wt_support < WT_SUPPORT_COMPATIBLE) { 519 error_setg(errp, "Background-snapshot is not compatible " 520 "with guest memory configuration"); 521 return false; 522 } 523 524 /* 525 * Check if there are any migration capabilities 526 * incompatible with 'background-snapshot'. 527 */ 528 for (idx = 0; idx < check_caps_background_snapshot.size; idx++) { 529 int incomp_cap = check_caps_background_snapshot.caps[idx]; 530 if (new_caps[incomp_cap]) { 531 error_setg(errp, 532 "Background-snapshot is not compatible with %s", 533 MigrationCapability_str(incomp_cap)); 534 return false; 535 } 536 } 537 } 538 539 #ifdef CONFIG_LINUX 540 if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND] && 541 (!new_caps[MIGRATION_CAPABILITY_MULTIFD] || 542 new_caps[MIGRATION_CAPABILITY_COMPRESS] || 543 new_caps[MIGRATION_CAPABILITY_XBZRLE] || 544 migrate_multifd_compression() || 545 migrate_tls())) { 546 error_setg(errp, 547 "Zero copy only available for non-compressed non-TLS multifd migration"); 548 return false; 549 } 550 #else 551 if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND]) { 552 error_setg(errp, 553 "Zero copy currently only available on Linux"); 554 return false; 555 } 556 #endif 557 558 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT]) { 559 if (!new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 560 error_setg(errp, "Postcopy preempt requires postcopy-ram"); 561 return false; 562 } 563 564 /* 565 * Preempt mode requires urgent pages to be sent in separate 566 * channel, OTOH compression logic will disorder all pages into 567 * different compression channels, which is not compatible with the 568 * preempt assumptions on channel assignments. 569 */ 570 if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) { 571 error_setg(errp, "Postcopy preempt not compatible with compress"); 572 return false; 573 } 574 575 if (migrate_incoming_started()) { 576 error_setg(errp, 577 "Postcopy preempt must be set before incoming starts"); 578 return false; 579 } 580 } 581 582 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 583 if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) { 584 error_setg(errp, "Multifd is not compatible with compress"); 585 return false; 586 } 587 if (migrate_incoming_started()) { 588 error_setg(errp, "Multifd must be set before incoming starts"); 589 return false; 590 } 591 } 592 593 if (new_caps[MIGRATION_CAPABILITY_SWITCHOVER_ACK]) { 594 if (!new_caps[MIGRATION_CAPABILITY_RETURN_PATH]) { 595 error_setg(errp, "Capability 'switchover-ack' requires capability " 596 "'return-path'"); 597 return false; 598 } 599 } 600 if (new_caps[MIGRATION_CAPABILITY_DIRTY_LIMIT]) { 601 if (new_caps[MIGRATION_CAPABILITY_AUTO_CONVERGE]) { 602 error_setg(errp, "dirty-limit conflicts with auto-converge" 603 " either of then available currently"); 604 return false; 605 } 606 607 if (!kvm_enabled() || !kvm_dirty_ring_enabled()) { 608 error_setg(errp, "dirty-limit requires KVM with accelerator" 609 " property 'dirty-ring-size' set"); 610 return false; 611 } 612 } 613 614 return true; 615 } 616 617 bool migrate_cap_set(int cap, bool value, Error **errp) 618 { 619 MigrationState *s = migrate_get_current(); 620 bool new_caps[MIGRATION_CAPABILITY__MAX]; 621 622 if (migration_is_running(s->state)) { 623 error_setg(errp, QERR_MIGRATION_ACTIVE); 624 return false; 625 } 626 627 memcpy(new_caps, s->capabilities, sizeof(new_caps)); 628 new_caps[cap] = value; 629 630 if (!migrate_caps_check(s->capabilities, new_caps, errp)) { 631 return false; 632 } 633 s->capabilities[cap] = value; 634 return true; 635 } 636 637 MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) 638 { 639 MigrationCapabilityStatusList *head = NULL, **tail = &head; 640 MigrationCapabilityStatus *caps; 641 MigrationState *s = migrate_get_current(); 642 int i; 643 644 for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { 645 #ifndef CONFIG_LIVE_BLOCK_MIGRATION 646 if (i == MIGRATION_CAPABILITY_BLOCK) { 647 continue; 648 } 649 #endif 650 caps = g_malloc0(sizeof(*caps)); 651 caps->capability = i; 652 caps->state = s->capabilities[i]; 653 QAPI_LIST_APPEND(tail, caps); 654 } 655 656 return head; 657 } 658 659 void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, 660 Error **errp) 661 { 662 MigrationState *s = migrate_get_current(); 663 MigrationCapabilityStatusList *cap; 664 bool new_caps[MIGRATION_CAPABILITY__MAX]; 665 666 if (migration_is_running(s->state) || migration_in_colo_state()) { 667 error_setg(errp, QERR_MIGRATION_ACTIVE); 668 return; 669 } 670 671 memcpy(new_caps, s->capabilities, sizeof(new_caps)); 672 for (cap = params; cap; cap = cap->next) { 673 new_caps[cap->value->capability] = cap->value->state; 674 } 675 676 if (!migrate_caps_check(s->capabilities, new_caps, errp)) { 677 return; 678 } 679 680 for (cap = params; cap; cap = cap->next) { 681 s->capabilities[cap->value->capability] = cap->value->state; 682 } 683 } 684 685 /* parameters */ 686 687 const BitmapMigrationNodeAliasList *migrate_block_bitmap_mapping(void) 688 { 689 MigrationState *s = migrate_get_current(); 690 691 return s->parameters.block_bitmap_mapping; 692 } 693 694 bool migrate_has_block_bitmap_mapping(void) 695 { 696 MigrationState *s = migrate_get_current(); 697 698 return s->parameters.has_block_bitmap_mapping; 699 } 700 701 bool migrate_block_incremental(void) 702 { 703 MigrationState *s = migrate_get_current(); 704 705 return s->parameters.block_incremental; 706 } 707 708 uint32_t migrate_checkpoint_delay(void) 709 { 710 MigrationState *s = migrate_get_current(); 711 712 return s->parameters.x_checkpoint_delay; 713 } 714 715 int migrate_compress_level(void) 716 { 717 MigrationState *s = migrate_get_current(); 718 719 return s->parameters.compress_level; 720 } 721 722 int migrate_compress_threads(void) 723 { 724 MigrationState *s = migrate_get_current(); 725 726 return s->parameters.compress_threads; 727 } 728 729 int migrate_compress_wait_thread(void) 730 { 731 MigrationState *s = migrate_get_current(); 732 733 return s->parameters.compress_wait_thread; 734 } 735 736 uint8_t migrate_cpu_throttle_increment(void) 737 { 738 MigrationState *s = migrate_get_current(); 739 740 return s->parameters.cpu_throttle_increment; 741 } 742 743 uint8_t migrate_cpu_throttle_initial(void) 744 { 745 MigrationState *s = migrate_get_current(); 746 747 return s->parameters.cpu_throttle_initial; 748 } 749 750 bool migrate_cpu_throttle_tailslow(void) 751 { 752 MigrationState *s = migrate_get_current(); 753 754 return s->parameters.cpu_throttle_tailslow; 755 } 756 757 int migrate_decompress_threads(void) 758 { 759 MigrationState *s = migrate_get_current(); 760 761 return s->parameters.decompress_threads; 762 } 763 764 uint64_t migrate_downtime_limit(void) 765 { 766 MigrationState *s = migrate_get_current(); 767 768 return s->parameters.downtime_limit; 769 } 770 771 uint8_t migrate_max_cpu_throttle(void) 772 { 773 MigrationState *s = migrate_get_current(); 774 775 return s->parameters.max_cpu_throttle; 776 } 777 778 uint64_t migrate_max_bandwidth(void) 779 { 780 MigrationState *s = migrate_get_current(); 781 782 return s->parameters.max_bandwidth; 783 } 784 785 uint64_t migrate_avail_switchover_bandwidth(void) 786 { 787 MigrationState *s = migrate_get_current(); 788 789 return s->parameters.avail_switchover_bandwidth; 790 } 791 792 uint64_t migrate_max_postcopy_bandwidth(void) 793 { 794 MigrationState *s = migrate_get_current(); 795 796 return s->parameters.max_postcopy_bandwidth; 797 } 798 799 int migrate_multifd_channels(void) 800 { 801 MigrationState *s = migrate_get_current(); 802 803 return s->parameters.multifd_channels; 804 } 805 806 MultiFDCompression migrate_multifd_compression(void) 807 { 808 MigrationState *s = migrate_get_current(); 809 810 assert(s->parameters.multifd_compression < MULTIFD_COMPRESSION__MAX); 811 return s->parameters.multifd_compression; 812 } 813 814 int migrate_multifd_zlib_level(void) 815 { 816 MigrationState *s = migrate_get_current(); 817 818 return s->parameters.multifd_zlib_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_xbzrle_cache_size(void) 857 { 858 MigrationState *s = migrate_get_current(); 859 860 return s->parameters.xbzrle_cache_size; 861 } 862 863 /* parameter setters */ 864 865 void migrate_set_block_incremental(bool value) 866 { 867 MigrationState *s = migrate_get_current(); 868 869 s->parameters.block_incremental = value; 870 } 871 872 /* parameters helpers */ 873 874 void block_cleanup_parameters(void) 875 { 876 MigrationState *s = migrate_get_current(); 877 878 if (s->must_remove_block_options) { 879 /* setting to false can never fail */ 880 migrate_cap_set(MIGRATION_CAPABILITY_BLOCK, false, &error_abort); 881 migrate_set_block_incremental(false); 882 s->must_remove_block_options = false; 883 } 884 } 885 886 AnnounceParameters *migrate_announce_params(void) 887 { 888 static AnnounceParameters ap; 889 890 MigrationState *s = migrate_get_current(); 891 892 ap.initial = s->parameters.announce_initial; 893 ap.max = s->parameters.announce_max; 894 ap.rounds = s->parameters.announce_rounds; 895 ap.step = s->parameters.announce_step; 896 897 return ≈ 898 } 899 900 MigrationParameters *qmp_query_migrate_parameters(Error **errp) 901 { 902 MigrationParameters *params; 903 MigrationState *s = migrate_get_current(); 904 905 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 906 params = g_malloc0(sizeof(*params)); 907 params->has_compress_level = true; 908 params->compress_level = s->parameters.compress_level; 909 params->has_compress_threads = true; 910 params->compress_threads = s->parameters.compress_threads; 911 params->has_compress_wait_thread = true; 912 params->compress_wait_thread = s->parameters.compress_wait_thread; 913 params->has_decompress_threads = true; 914 params->decompress_threads = s->parameters.decompress_threads; 915 params->has_throttle_trigger_threshold = true; 916 params->throttle_trigger_threshold = s->parameters.throttle_trigger_threshold; 917 params->has_cpu_throttle_initial = true; 918 params->cpu_throttle_initial = s->parameters.cpu_throttle_initial; 919 params->has_cpu_throttle_increment = true; 920 params->cpu_throttle_increment = s->parameters.cpu_throttle_increment; 921 params->has_cpu_throttle_tailslow = true; 922 params->cpu_throttle_tailslow = s->parameters.cpu_throttle_tailslow; 923 params->tls_creds = g_strdup(s->parameters.tls_creds); 924 params->tls_hostname = g_strdup(s->parameters.tls_hostname); 925 params->tls_authz = g_strdup(s->parameters.tls_authz ? 926 s->parameters.tls_authz : ""); 927 params->has_max_bandwidth = true; 928 params->max_bandwidth = s->parameters.max_bandwidth; 929 params->has_avail_switchover_bandwidth = true; 930 params->avail_switchover_bandwidth = s->parameters.avail_switchover_bandwidth; 931 params->has_downtime_limit = true; 932 params->downtime_limit = s->parameters.downtime_limit; 933 params->has_x_checkpoint_delay = true; 934 params->x_checkpoint_delay = s->parameters.x_checkpoint_delay; 935 params->has_block_incremental = true; 936 params->block_incremental = s->parameters.block_incremental; 937 params->has_multifd_channels = true; 938 params->multifd_channels = s->parameters.multifd_channels; 939 params->has_multifd_compression = true; 940 params->multifd_compression = s->parameters.multifd_compression; 941 params->has_multifd_zlib_level = true; 942 params->multifd_zlib_level = s->parameters.multifd_zlib_level; 943 params->has_multifd_zstd_level = true; 944 params->multifd_zstd_level = s->parameters.multifd_zstd_level; 945 params->has_xbzrle_cache_size = true; 946 params->xbzrle_cache_size = s->parameters.xbzrle_cache_size; 947 params->has_max_postcopy_bandwidth = true; 948 params->max_postcopy_bandwidth = s->parameters.max_postcopy_bandwidth; 949 params->has_max_cpu_throttle = true; 950 params->max_cpu_throttle = s->parameters.max_cpu_throttle; 951 params->has_announce_initial = true; 952 params->announce_initial = s->parameters.announce_initial; 953 params->has_announce_max = true; 954 params->announce_max = s->parameters.announce_max; 955 params->has_announce_rounds = true; 956 params->announce_rounds = s->parameters.announce_rounds; 957 params->has_announce_step = true; 958 params->announce_step = s->parameters.announce_step; 959 960 if (s->parameters.has_block_bitmap_mapping) { 961 params->has_block_bitmap_mapping = true; 962 params->block_bitmap_mapping = 963 QAPI_CLONE(BitmapMigrationNodeAliasList, 964 s->parameters.block_bitmap_mapping); 965 } 966 967 params->has_x_vcpu_dirty_limit_period = true; 968 params->x_vcpu_dirty_limit_period = s->parameters.x_vcpu_dirty_limit_period; 969 params->has_vcpu_dirty_limit = true; 970 params->vcpu_dirty_limit = s->parameters.vcpu_dirty_limit; 971 972 return params; 973 } 974 975 void migrate_params_init(MigrationParameters *params) 976 { 977 params->tls_hostname = g_strdup(""); 978 params->tls_creds = g_strdup(""); 979 980 /* Set has_* up only for parameter checks */ 981 params->has_compress_level = true; 982 params->has_compress_threads = true; 983 params->has_compress_wait_thread = true; 984 params->has_decompress_threads = true; 985 params->has_throttle_trigger_threshold = true; 986 params->has_cpu_throttle_initial = true; 987 params->has_cpu_throttle_increment = true; 988 params->has_cpu_throttle_tailslow = true; 989 params->has_max_bandwidth = true; 990 params->has_downtime_limit = true; 991 params->has_x_checkpoint_delay = true; 992 params->has_block_incremental = true; 993 params->has_multifd_channels = true; 994 params->has_multifd_compression = true; 995 params->has_multifd_zlib_level = true; 996 params->has_multifd_zstd_level = true; 997 params->has_xbzrle_cache_size = true; 998 params->has_max_postcopy_bandwidth = true; 999 params->has_max_cpu_throttle = true; 1000 params->has_announce_initial = true; 1001 params->has_announce_max = true; 1002 params->has_announce_rounds = true; 1003 params->has_announce_step = true; 1004 params->has_x_vcpu_dirty_limit_period = true; 1005 params->has_vcpu_dirty_limit = true; 1006 } 1007 1008 /* 1009 * Check whether the parameters are valid. Error will be put into errp 1010 * (if provided). Return true if valid, otherwise false. 1011 */ 1012 bool migrate_params_check(MigrationParameters *params, Error **errp) 1013 { 1014 if (params->has_compress_level && 1015 (params->compress_level > 9)) { 1016 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level", 1017 "a value between 0 and 9"); 1018 return false; 1019 } 1020 1021 if (params->has_compress_threads && (params->compress_threads < 1)) { 1022 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1023 "compress_threads", 1024 "a value between 1 and 255"); 1025 return false; 1026 } 1027 1028 if (params->has_decompress_threads && (params->decompress_threads < 1)) { 1029 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1030 "decompress_threads", 1031 "a value between 1 and 255"); 1032 return false; 1033 } 1034 1035 if (params->has_throttle_trigger_threshold && 1036 (params->throttle_trigger_threshold < 1 || 1037 params->throttle_trigger_threshold > 100)) { 1038 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1039 "throttle_trigger_threshold", 1040 "an integer in the range of 1 to 100"); 1041 return false; 1042 } 1043 1044 if (params->has_cpu_throttle_initial && 1045 (params->cpu_throttle_initial < 1 || 1046 params->cpu_throttle_initial > 99)) { 1047 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1048 "cpu_throttle_initial", 1049 "an integer in the range of 1 to 99"); 1050 return false; 1051 } 1052 1053 if (params->has_cpu_throttle_increment && 1054 (params->cpu_throttle_increment < 1 || 1055 params->cpu_throttle_increment > 99)) { 1056 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1057 "cpu_throttle_increment", 1058 "an integer in the range of 1 to 99"); 1059 return false; 1060 } 1061 1062 if (params->has_max_bandwidth && (params->max_bandwidth > SIZE_MAX)) { 1063 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1064 "max_bandwidth", 1065 "an integer in the range of 0 to "stringify(SIZE_MAX) 1066 " bytes/second"); 1067 return false; 1068 } 1069 1070 if (params->has_avail_switchover_bandwidth && 1071 (params->avail_switchover_bandwidth > SIZE_MAX)) { 1072 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1073 "avail_switchover_bandwidth", 1074 "an integer in the range of 0 to "stringify(SIZE_MAX) 1075 " bytes/second"); 1076 return false; 1077 } 1078 1079 if (params->has_downtime_limit && 1080 (params->downtime_limit > MAX_MIGRATE_DOWNTIME)) { 1081 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1082 "downtime_limit", 1083 "an integer in the range of 0 to " 1084 stringify(MAX_MIGRATE_DOWNTIME)" ms"); 1085 return false; 1086 } 1087 1088 /* x_checkpoint_delay is now always positive */ 1089 1090 if (params->has_multifd_channels && (params->multifd_channels < 1)) { 1091 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1092 "multifd_channels", 1093 "a value between 1 and 255"); 1094 return false; 1095 } 1096 1097 if (params->has_multifd_zlib_level && 1098 (params->multifd_zlib_level > 9)) { 1099 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zlib_level", 1100 "a value between 0 and 9"); 1101 return false; 1102 } 1103 1104 if (params->has_multifd_zstd_level && 1105 (params->multifd_zstd_level > 20)) { 1106 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zstd_level", 1107 "a value between 0 and 20"); 1108 return false; 1109 } 1110 1111 if (params->has_xbzrle_cache_size && 1112 (params->xbzrle_cache_size < qemu_target_page_size() || 1113 !is_power_of_2(params->xbzrle_cache_size))) { 1114 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1115 "xbzrle_cache_size", 1116 "a power of two no less than the target page size"); 1117 return false; 1118 } 1119 1120 if (params->has_max_cpu_throttle && 1121 (params->max_cpu_throttle < params->cpu_throttle_initial || 1122 params->max_cpu_throttle > 99)) { 1123 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1124 "max_cpu_throttle", 1125 "an integer in the range of cpu_throttle_initial to 99"); 1126 return false; 1127 } 1128 1129 if (params->has_announce_initial && 1130 params->announce_initial > 100000) { 1131 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1132 "announce_initial", 1133 "a value between 0 and 100000"); 1134 return false; 1135 } 1136 if (params->has_announce_max && 1137 params->announce_max > 100000) { 1138 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1139 "announce_max", 1140 "a value between 0 and 100000"); 1141 return false; 1142 } 1143 if (params->has_announce_rounds && 1144 params->announce_rounds > 1000) { 1145 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1146 "announce_rounds", 1147 "a value between 0 and 1000"); 1148 return false; 1149 } 1150 if (params->has_announce_step && 1151 (params->announce_step < 1 || 1152 params->announce_step > 10000)) { 1153 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1154 "announce_step", 1155 "a value between 0 and 10000"); 1156 return false; 1157 } 1158 1159 if (params->has_block_bitmap_mapping && 1160 !check_dirty_bitmap_mig_alias_map(params->block_bitmap_mapping, errp)) { 1161 error_prepend(errp, "Invalid mapping given for block-bitmap-mapping: "); 1162 return false; 1163 } 1164 1165 #ifdef CONFIG_LINUX 1166 if (migrate_zero_copy_send() && 1167 ((params->has_multifd_compression && params->multifd_compression) || 1168 (params->tls_creds && *params->tls_creds))) { 1169 error_setg(errp, 1170 "Zero copy only available for non-compressed non-TLS multifd migration"); 1171 return false; 1172 } 1173 #endif 1174 1175 if (params->has_x_vcpu_dirty_limit_period && 1176 (params->x_vcpu_dirty_limit_period < 1 || 1177 params->x_vcpu_dirty_limit_period > 1000)) { 1178 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1179 "x-vcpu-dirty-limit-period", 1180 "a value between 1 and 1000"); 1181 return false; 1182 } 1183 1184 if (params->has_vcpu_dirty_limit && 1185 (params->vcpu_dirty_limit < 1)) { 1186 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1187 "vcpu_dirty_limit", 1188 "is invalid, it must greater then 1 MB/s"); 1189 return false; 1190 } 1191 1192 return true; 1193 } 1194 1195 static void migrate_params_test_apply(MigrateSetParameters *params, 1196 MigrationParameters *dest) 1197 { 1198 *dest = migrate_get_current()->parameters; 1199 1200 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 1201 1202 if (params->has_compress_level) { 1203 dest->compress_level = params->compress_level; 1204 } 1205 1206 if (params->has_compress_threads) { 1207 dest->compress_threads = params->compress_threads; 1208 } 1209 1210 if (params->has_compress_wait_thread) { 1211 dest->compress_wait_thread = params->compress_wait_thread; 1212 } 1213 1214 if (params->has_decompress_threads) { 1215 dest->decompress_threads = params->decompress_threads; 1216 } 1217 1218 if (params->has_throttle_trigger_threshold) { 1219 dest->throttle_trigger_threshold = params->throttle_trigger_threshold; 1220 } 1221 1222 if (params->has_cpu_throttle_initial) { 1223 dest->cpu_throttle_initial = params->cpu_throttle_initial; 1224 } 1225 1226 if (params->has_cpu_throttle_increment) { 1227 dest->cpu_throttle_increment = params->cpu_throttle_increment; 1228 } 1229 1230 if (params->has_cpu_throttle_tailslow) { 1231 dest->cpu_throttle_tailslow = params->cpu_throttle_tailslow; 1232 } 1233 1234 if (params->tls_creds) { 1235 assert(params->tls_creds->type == QTYPE_QSTRING); 1236 dest->tls_creds = params->tls_creds->u.s; 1237 } 1238 1239 if (params->tls_hostname) { 1240 assert(params->tls_hostname->type == QTYPE_QSTRING); 1241 dest->tls_hostname = params->tls_hostname->u.s; 1242 } 1243 1244 if (params->has_max_bandwidth) { 1245 dest->max_bandwidth = params->max_bandwidth; 1246 } 1247 1248 if (params->has_avail_switchover_bandwidth) { 1249 dest->avail_switchover_bandwidth = params->avail_switchover_bandwidth; 1250 } 1251 1252 if (params->has_downtime_limit) { 1253 dest->downtime_limit = params->downtime_limit; 1254 } 1255 1256 if (params->has_x_checkpoint_delay) { 1257 dest->x_checkpoint_delay = params->x_checkpoint_delay; 1258 } 1259 1260 if (params->has_block_incremental) { 1261 dest->block_incremental = params->block_incremental; 1262 } 1263 if (params->has_multifd_channels) { 1264 dest->multifd_channels = params->multifd_channels; 1265 } 1266 if (params->has_multifd_compression) { 1267 dest->multifd_compression = params->multifd_compression; 1268 } 1269 if (params->has_xbzrle_cache_size) { 1270 dest->xbzrle_cache_size = params->xbzrle_cache_size; 1271 } 1272 if (params->has_max_postcopy_bandwidth) { 1273 dest->max_postcopy_bandwidth = params->max_postcopy_bandwidth; 1274 } 1275 if (params->has_max_cpu_throttle) { 1276 dest->max_cpu_throttle = params->max_cpu_throttle; 1277 } 1278 if (params->has_announce_initial) { 1279 dest->announce_initial = params->announce_initial; 1280 } 1281 if (params->has_announce_max) { 1282 dest->announce_max = params->announce_max; 1283 } 1284 if (params->has_announce_rounds) { 1285 dest->announce_rounds = params->announce_rounds; 1286 } 1287 if (params->has_announce_step) { 1288 dest->announce_step = params->announce_step; 1289 } 1290 1291 if (params->has_block_bitmap_mapping) { 1292 dest->has_block_bitmap_mapping = true; 1293 dest->block_bitmap_mapping = params->block_bitmap_mapping; 1294 } 1295 1296 if (params->has_x_vcpu_dirty_limit_period) { 1297 dest->x_vcpu_dirty_limit_period = 1298 params->x_vcpu_dirty_limit_period; 1299 } 1300 if (params->has_vcpu_dirty_limit) { 1301 dest->vcpu_dirty_limit = params->vcpu_dirty_limit; 1302 } 1303 } 1304 1305 static void migrate_params_apply(MigrateSetParameters *params, Error **errp) 1306 { 1307 MigrationState *s = migrate_get_current(); 1308 1309 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 1310 1311 if (params->has_compress_level) { 1312 s->parameters.compress_level = params->compress_level; 1313 } 1314 1315 if (params->has_compress_threads) { 1316 s->parameters.compress_threads = params->compress_threads; 1317 } 1318 1319 if (params->has_compress_wait_thread) { 1320 s->parameters.compress_wait_thread = params->compress_wait_thread; 1321 } 1322 1323 if (params->has_decompress_threads) { 1324 s->parameters.decompress_threads = params->decompress_threads; 1325 } 1326 1327 if (params->has_throttle_trigger_threshold) { 1328 s->parameters.throttle_trigger_threshold = params->throttle_trigger_threshold; 1329 } 1330 1331 if (params->has_cpu_throttle_initial) { 1332 s->parameters.cpu_throttle_initial = params->cpu_throttle_initial; 1333 } 1334 1335 if (params->has_cpu_throttle_increment) { 1336 s->parameters.cpu_throttle_increment = params->cpu_throttle_increment; 1337 } 1338 1339 if (params->has_cpu_throttle_tailslow) { 1340 s->parameters.cpu_throttle_tailslow = params->cpu_throttle_tailslow; 1341 } 1342 1343 if (params->tls_creds) { 1344 g_free(s->parameters.tls_creds); 1345 assert(params->tls_creds->type == QTYPE_QSTRING); 1346 s->parameters.tls_creds = g_strdup(params->tls_creds->u.s); 1347 } 1348 1349 if (params->tls_hostname) { 1350 g_free(s->parameters.tls_hostname); 1351 assert(params->tls_hostname->type == QTYPE_QSTRING); 1352 s->parameters.tls_hostname = g_strdup(params->tls_hostname->u.s); 1353 } 1354 1355 if (params->tls_authz) { 1356 g_free(s->parameters.tls_authz); 1357 assert(params->tls_authz->type == QTYPE_QSTRING); 1358 s->parameters.tls_authz = g_strdup(params->tls_authz->u.s); 1359 } 1360 1361 if (params->has_max_bandwidth) { 1362 s->parameters.max_bandwidth = params->max_bandwidth; 1363 if (s->to_dst_file && !migration_in_postcopy()) { 1364 migration_rate_set(s->parameters.max_bandwidth); 1365 } 1366 } 1367 1368 if (params->has_avail_switchover_bandwidth) { 1369 s->parameters.avail_switchover_bandwidth = params->avail_switchover_bandwidth; 1370 } 1371 1372 if (params->has_downtime_limit) { 1373 s->parameters.downtime_limit = params->downtime_limit; 1374 } 1375 1376 if (params->has_x_checkpoint_delay) { 1377 s->parameters.x_checkpoint_delay = params->x_checkpoint_delay; 1378 colo_checkpoint_delay_set(); 1379 } 1380 1381 if (params->has_block_incremental) { 1382 s->parameters.block_incremental = params->block_incremental; 1383 } 1384 if (params->has_multifd_channels) { 1385 s->parameters.multifd_channels = params->multifd_channels; 1386 } 1387 if (params->has_multifd_compression) { 1388 s->parameters.multifd_compression = params->multifd_compression; 1389 } 1390 if (params->has_xbzrle_cache_size) { 1391 s->parameters.xbzrle_cache_size = params->xbzrle_cache_size; 1392 xbzrle_cache_resize(params->xbzrle_cache_size, errp); 1393 } 1394 if (params->has_max_postcopy_bandwidth) { 1395 s->parameters.max_postcopy_bandwidth = params->max_postcopy_bandwidth; 1396 if (s->to_dst_file && migration_in_postcopy()) { 1397 migration_rate_set(s->parameters.max_postcopy_bandwidth); 1398 } 1399 } 1400 if (params->has_max_cpu_throttle) { 1401 s->parameters.max_cpu_throttle = params->max_cpu_throttle; 1402 } 1403 if (params->has_announce_initial) { 1404 s->parameters.announce_initial = params->announce_initial; 1405 } 1406 if (params->has_announce_max) { 1407 s->parameters.announce_max = params->announce_max; 1408 } 1409 if (params->has_announce_rounds) { 1410 s->parameters.announce_rounds = params->announce_rounds; 1411 } 1412 if (params->has_announce_step) { 1413 s->parameters.announce_step = params->announce_step; 1414 } 1415 1416 if (params->has_block_bitmap_mapping) { 1417 qapi_free_BitmapMigrationNodeAliasList( 1418 s->parameters.block_bitmap_mapping); 1419 1420 s->parameters.has_block_bitmap_mapping = true; 1421 s->parameters.block_bitmap_mapping = 1422 QAPI_CLONE(BitmapMigrationNodeAliasList, 1423 params->block_bitmap_mapping); 1424 } 1425 1426 if (params->has_x_vcpu_dirty_limit_period) { 1427 s->parameters.x_vcpu_dirty_limit_period = 1428 params->x_vcpu_dirty_limit_period; 1429 } 1430 if (params->has_vcpu_dirty_limit) { 1431 s->parameters.vcpu_dirty_limit = params->vcpu_dirty_limit; 1432 } 1433 } 1434 1435 void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp) 1436 { 1437 MigrationParameters tmp; 1438 1439 /* TODO Rewrite "" to null instead for all three tls_* parameters */ 1440 if (params->tls_creds 1441 && params->tls_creds->type == QTYPE_QNULL) { 1442 qobject_unref(params->tls_creds->u.n); 1443 params->tls_creds->type = QTYPE_QSTRING; 1444 params->tls_creds->u.s = strdup(""); 1445 } 1446 if (params->tls_hostname 1447 && params->tls_hostname->type == QTYPE_QNULL) { 1448 qobject_unref(params->tls_hostname->u.n); 1449 params->tls_hostname->type = QTYPE_QSTRING; 1450 params->tls_hostname->u.s = strdup(""); 1451 } 1452 if (params->tls_authz 1453 && params->tls_authz->type == QTYPE_QNULL) { 1454 qobject_unref(params->tls_authz->u.n); 1455 params->tls_authz->type = QTYPE_QSTRING; 1456 params->tls_authz->u.s = strdup(""); 1457 } 1458 1459 migrate_params_test_apply(params, &tmp); 1460 1461 if (!migrate_params_check(&tmp, errp)) { 1462 /* Invalid parameter */ 1463 return; 1464 } 1465 1466 migrate_params_apply(params, errp); 1467 } 1468