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_rdma(void) 382 { 383 MigrationState *s = migrate_get_current(); 384 385 return s->rdma_migration; 386 } 387 388 bool migrate_tls(void) 389 { 390 MigrationState *s = migrate_get_current(); 391 392 return s->parameters.tls_creds && *s->parameters.tls_creds; 393 } 394 395 typedef enum WriteTrackingSupport { 396 WT_SUPPORT_UNKNOWN = 0, 397 WT_SUPPORT_ABSENT, 398 WT_SUPPORT_AVAILABLE, 399 WT_SUPPORT_COMPATIBLE 400 } WriteTrackingSupport; 401 402 static 403 WriteTrackingSupport migrate_query_write_tracking(void) 404 { 405 /* Check if kernel supports required UFFD features */ 406 if (!ram_write_tracking_available()) { 407 return WT_SUPPORT_ABSENT; 408 } 409 /* 410 * Check if current memory configuration is 411 * compatible with required UFFD features. 412 */ 413 if (!ram_write_tracking_compatible()) { 414 return WT_SUPPORT_AVAILABLE; 415 } 416 417 return WT_SUPPORT_COMPATIBLE; 418 } 419 420 /* Migration capabilities set */ 421 struct MigrateCapsSet { 422 int size; /* Capability set size */ 423 MigrationCapability caps[]; /* Variadic array of capabilities */ 424 }; 425 typedef struct MigrateCapsSet MigrateCapsSet; 426 427 /* Define and initialize MigrateCapsSet */ 428 #define INITIALIZE_MIGRATE_CAPS_SET(_name, ...) \ 429 MigrateCapsSet _name = { \ 430 .size = sizeof((int []) { __VA_ARGS__ }) / sizeof(int), \ 431 .caps = { __VA_ARGS__ } \ 432 } 433 434 /* Background-snapshot compatibility check list */ 435 static const 436 INITIALIZE_MIGRATE_CAPS_SET(check_caps_background_snapshot, 437 MIGRATION_CAPABILITY_POSTCOPY_RAM, 438 MIGRATION_CAPABILITY_DIRTY_BITMAPS, 439 MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME, 440 MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE, 441 MIGRATION_CAPABILITY_RETURN_PATH, 442 MIGRATION_CAPABILITY_MULTIFD, 443 MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER, 444 MIGRATION_CAPABILITY_AUTO_CONVERGE, 445 MIGRATION_CAPABILITY_RELEASE_RAM, 446 MIGRATION_CAPABILITY_RDMA_PIN_ALL, 447 MIGRATION_CAPABILITY_COMPRESS, 448 MIGRATION_CAPABILITY_XBZRLE, 449 MIGRATION_CAPABILITY_X_COLO, 450 MIGRATION_CAPABILITY_VALIDATE_UUID, 451 MIGRATION_CAPABILITY_ZERO_COPY_SEND); 452 453 static bool migrate_incoming_started(void) 454 { 455 return !!migration_incoming_get_current()->transport_data; 456 } 457 458 /** 459 * @migration_caps_check - check capability compatibility 460 * 461 * @old_caps: old capability list 462 * @new_caps: new capability list 463 * @errp: set *errp if the check failed, with reason 464 * 465 * Returns true if check passed, otherwise false. 466 */ 467 bool migrate_caps_check(bool *old_caps, bool *new_caps, Error **errp) 468 { 469 MigrationIncomingState *mis = migration_incoming_get_current(); 470 471 ERRP_GUARD(); 472 #ifndef CONFIG_LIVE_BLOCK_MIGRATION 473 if (new_caps[MIGRATION_CAPABILITY_BLOCK]) { 474 error_setg(errp, "QEMU compiled without old-style (blk/-b, inc/-i) " 475 "block migration"); 476 error_append_hint(errp, "Use drive_mirror+NBD instead.\n"); 477 return false; 478 } 479 #endif 480 481 #ifndef CONFIG_REPLICATION 482 if (new_caps[MIGRATION_CAPABILITY_X_COLO]) { 483 error_setg(errp, "QEMU compiled without replication module" 484 " can't enable COLO"); 485 error_append_hint(errp, "Please enable replication before COLO.\n"); 486 return false; 487 } 488 #endif 489 490 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 491 /* This check is reasonably expensive, so only when it's being 492 * set the first time, also it's only the destination that needs 493 * special support. 494 */ 495 if (!old_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM] && 496 runstate_check(RUN_STATE_INMIGRATE) && 497 !postcopy_ram_supported_by_host(mis, errp)) { 498 error_prepend(errp, "Postcopy is not supported: "); 499 return false; 500 } 501 502 if (new_caps[MIGRATION_CAPABILITY_X_IGNORE_SHARED]) { 503 error_setg(errp, "Postcopy is not compatible with ignore-shared"); 504 return false; 505 } 506 507 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 508 error_setg(errp, "Postcopy is not yet compatible with multifd"); 509 return false; 510 } 511 } 512 513 if (new_caps[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]) { 514 WriteTrackingSupport wt_support; 515 int idx; 516 /* 517 * Check if 'background-snapshot' capability is supported by 518 * host kernel and compatible with guest memory configuration. 519 */ 520 wt_support = migrate_query_write_tracking(); 521 if (wt_support < WT_SUPPORT_AVAILABLE) { 522 error_setg(errp, "Background-snapshot is not supported by host kernel"); 523 return false; 524 } 525 if (wt_support < WT_SUPPORT_COMPATIBLE) { 526 error_setg(errp, "Background-snapshot is not compatible " 527 "with guest memory configuration"); 528 return false; 529 } 530 531 /* 532 * Check if there are any migration capabilities 533 * incompatible with 'background-snapshot'. 534 */ 535 for (idx = 0; idx < check_caps_background_snapshot.size; idx++) { 536 int incomp_cap = check_caps_background_snapshot.caps[idx]; 537 if (new_caps[incomp_cap]) { 538 error_setg(errp, 539 "Background-snapshot is not compatible with %s", 540 MigrationCapability_str(incomp_cap)); 541 return false; 542 } 543 } 544 } 545 546 #ifdef CONFIG_LINUX 547 if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND] && 548 (!new_caps[MIGRATION_CAPABILITY_MULTIFD] || 549 new_caps[MIGRATION_CAPABILITY_COMPRESS] || 550 new_caps[MIGRATION_CAPABILITY_XBZRLE] || 551 migrate_multifd_compression() || 552 migrate_tls())) { 553 error_setg(errp, 554 "Zero copy only available for non-compressed non-TLS multifd migration"); 555 return false; 556 } 557 #else 558 if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND]) { 559 error_setg(errp, 560 "Zero copy currently only available on Linux"); 561 return false; 562 } 563 #endif 564 565 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT]) { 566 if (!new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 567 error_setg(errp, "Postcopy preempt requires postcopy-ram"); 568 return false; 569 } 570 571 /* 572 * Preempt mode requires urgent pages to be sent in separate 573 * channel, OTOH compression logic will disorder all pages into 574 * different compression channels, which is not compatible with the 575 * preempt assumptions on channel assignments. 576 */ 577 if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) { 578 error_setg(errp, "Postcopy preempt not compatible with compress"); 579 return false; 580 } 581 582 if (migrate_incoming_started()) { 583 error_setg(errp, 584 "Postcopy preempt must be set before incoming starts"); 585 return false; 586 } 587 } 588 589 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 590 if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) { 591 error_setg(errp, "Multifd is not compatible with compress"); 592 return false; 593 } 594 if (migrate_incoming_started()) { 595 error_setg(errp, "Multifd must be set before incoming starts"); 596 return false; 597 } 598 } 599 600 if (new_caps[MIGRATION_CAPABILITY_SWITCHOVER_ACK]) { 601 if (!new_caps[MIGRATION_CAPABILITY_RETURN_PATH]) { 602 error_setg(errp, "Capability 'switchover-ack' requires capability " 603 "'return-path'"); 604 return false; 605 } 606 } 607 if (new_caps[MIGRATION_CAPABILITY_DIRTY_LIMIT]) { 608 if (new_caps[MIGRATION_CAPABILITY_AUTO_CONVERGE]) { 609 error_setg(errp, "dirty-limit conflicts with auto-converge" 610 " either of then available currently"); 611 return false; 612 } 613 614 if (!kvm_enabled() || !kvm_dirty_ring_enabled()) { 615 error_setg(errp, "dirty-limit requires KVM with accelerator" 616 " property 'dirty-ring-size' set"); 617 return false; 618 } 619 } 620 621 return true; 622 } 623 624 bool migrate_cap_set(int cap, bool value, Error **errp) 625 { 626 MigrationState *s = migrate_get_current(); 627 bool new_caps[MIGRATION_CAPABILITY__MAX]; 628 629 if (migration_is_running(s->state)) { 630 error_setg(errp, QERR_MIGRATION_ACTIVE); 631 return false; 632 } 633 634 memcpy(new_caps, s->capabilities, sizeof(new_caps)); 635 new_caps[cap] = value; 636 637 if (!migrate_caps_check(s->capabilities, new_caps, errp)) { 638 return false; 639 } 640 s->capabilities[cap] = value; 641 return true; 642 } 643 644 MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) 645 { 646 MigrationCapabilityStatusList *head = NULL, **tail = &head; 647 MigrationCapabilityStatus *caps; 648 MigrationState *s = migrate_get_current(); 649 int i; 650 651 for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { 652 #ifndef CONFIG_LIVE_BLOCK_MIGRATION 653 if (i == MIGRATION_CAPABILITY_BLOCK) { 654 continue; 655 } 656 #endif 657 caps = g_malloc0(sizeof(*caps)); 658 caps->capability = i; 659 caps->state = s->capabilities[i]; 660 QAPI_LIST_APPEND(tail, caps); 661 } 662 663 return head; 664 } 665 666 void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, 667 Error **errp) 668 { 669 MigrationState *s = migrate_get_current(); 670 MigrationCapabilityStatusList *cap; 671 bool new_caps[MIGRATION_CAPABILITY__MAX]; 672 673 if (migration_is_running(s->state) || migration_in_colo_state()) { 674 error_setg(errp, QERR_MIGRATION_ACTIVE); 675 return; 676 } 677 678 memcpy(new_caps, s->capabilities, sizeof(new_caps)); 679 for (cap = params; cap; cap = cap->next) { 680 new_caps[cap->value->capability] = cap->value->state; 681 } 682 683 if (!migrate_caps_check(s->capabilities, new_caps, errp)) { 684 return; 685 } 686 687 for (cap = params; cap; cap = cap->next) { 688 s->capabilities[cap->value->capability] = cap->value->state; 689 } 690 } 691 692 /* parameters */ 693 694 const BitmapMigrationNodeAliasList *migrate_block_bitmap_mapping(void) 695 { 696 MigrationState *s = migrate_get_current(); 697 698 return s->parameters.block_bitmap_mapping; 699 } 700 701 bool migrate_has_block_bitmap_mapping(void) 702 { 703 MigrationState *s = migrate_get_current(); 704 705 return s->parameters.has_block_bitmap_mapping; 706 } 707 708 bool migrate_block_incremental(void) 709 { 710 MigrationState *s = migrate_get_current(); 711 712 return s->parameters.block_incremental; 713 } 714 715 uint32_t migrate_checkpoint_delay(void) 716 { 717 MigrationState *s = migrate_get_current(); 718 719 return s->parameters.x_checkpoint_delay; 720 } 721 722 int migrate_compress_level(void) 723 { 724 MigrationState *s = migrate_get_current(); 725 726 return s->parameters.compress_level; 727 } 728 729 int migrate_compress_threads(void) 730 { 731 MigrationState *s = migrate_get_current(); 732 733 return s->parameters.compress_threads; 734 } 735 736 int migrate_compress_wait_thread(void) 737 { 738 MigrationState *s = migrate_get_current(); 739 740 return s->parameters.compress_wait_thread; 741 } 742 743 uint8_t migrate_cpu_throttle_increment(void) 744 { 745 MigrationState *s = migrate_get_current(); 746 747 return s->parameters.cpu_throttle_increment; 748 } 749 750 uint8_t migrate_cpu_throttle_initial(void) 751 { 752 MigrationState *s = migrate_get_current(); 753 754 return s->parameters.cpu_throttle_initial; 755 } 756 757 bool migrate_cpu_throttle_tailslow(void) 758 { 759 MigrationState *s = migrate_get_current(); 760 761 return s->parameters.cpu_throttle_tailslow; 762 } 763 764 int migrate_decompress_threads(void) 765 { 766 MigrationState *s = migrate_get_current(); 767 768 return s->parameters.decompress_threads; 769 } 770 771 uint64_t migrate_downtime_limit(void) 772 { 773 MigrationState *s = migrate_get_current(); 774 775 return s->parameters.downtime_limit; 776 } 777 778 uint8_t migrate_max_cpu_throttle(void) 779 { 780 MigrationState *s = migrate_get_current(); 781 782 return s->parameters.max_cpu_throttle; 783 } 784 785 uint64_t migrate_max_bandwidth(void) 786 { 787 MigrationState *s = migrate_get_current(); 788 789 return s->parameters.max_bandwidth; 790 } 791 792 uint64_t migrate_avail_switchover_bandwidth(void) 793 { 794 MigrationState *s = migrate_get_current(); 795 796 return s->parameters.avail_switchover_bandwidth; 797 } 798 799 uint64_t migrate_max_postcopy_bandwidth(void) 800 { 801 MigrationState *s = migrate_get_current(); 802 803 return s->parameters.max_postcopy_bandwidth; 804 } 805 806 int migrate_multifd_channels(void) 807 { 808 MigrationState *s = migrate_get_current(); 809 810 return s->parameters.multifd_channels; 811 } 812 813 MultiFDCompression migrate_multifd_compression(void) 814 { 815 MigrationState *s = migrate_get_current(); 816 817 assert(s->parameters.multifd_compression < MULTIFD_COMPRESSION__MAX); 818 return s->parameters.multifd_compression; 819 } 820 821 int migrate_multifd_zlib_level(void) 822 { 823 MigrationState *s = migrate_get_current(); 824 825 return s->parameters.multifd_zlib_level; 826 } 827 828 int migrate_multifd_zstd_level(void) 829 { 830 MigrationState *s = migrate_get_current(); 831 832 return s->parameters.multifd_zstd_level; 833 } 834 835 uint8_t migrate_throttle_trigger_threshold(void) 836 { 837 MigrationState *s = migrate_get_current(); 838 839 return s->parameters.throttle_trigger_threshold; 840 } 841 842 const char *migrate_tls_authz(void) 843 { 844 MigrationState *s = migrate_get_current(); 845 846 return s->parameters.tls_authz; 847 } 848 849 const char *migrate_tls_creds(void) 850 { 851 MigrationState *s = migrate_get_current(); 852 853 return s->parameters.tls_creds; 854 } 855 856 const char *migrate_tls_hostname(void) 857 { 858 MigrationState *s = migrate_get_current(); 859 860 return s->parameters.tls_hostname; 861 } 862 863 uint64_t migrate_xbzrle_cache_size(void) 864 { 865 MigrationState *s = migrate_get_current(); 866 867 return s->parameters.xbzrle_cache_size; 868 } 869 870 /* parameter setters */ 871 872 void migrate_set_block_incremental(bool value) 873 { 874 MigrationState *s = migrate_get_current(); 875 876 s->parameters.block_incremental = value; 877 } 878 879 /* parameters helpers */ 880 881 void block_cleanup_parameters(void) 882 { 883 MigrationState *s = migrate_get_current(); 884 885 if (s->must_remove_block_options) { 886 /* setting to false can never fail */ 887 migrate_cap_set(MIGRATION_CAPABILITY_BLOCK, false, &error_abort); 888 migrate_set_block_incremental(false); 889 s->must_remove_block_options = false; 890 } 891 } 892 893 AnnounceParameters *migrate_announce_params(void) 894 { 895 static AnnounceParameters ap; 896 897 MigrationState *s = migrate_get_current(); 898 899 ap.initial = s->parameters.announce_initial; 900 ap.max = s->parameters.announce_max; 901 ap.rounds = s->parameters.announce_rounds; 902 ap.step = s->parameters.announce_step; 903 904 return ≈ 905 } 906 907 MigrationParameters *qmp_query_migrate_parameters(Error **errp) 908 { 909 MigrationParameters *params; 910 MigrationState *s = migrate_get_current(); 911 912 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 913 params = g_malloc0(sizeof(*params)); 914 params->has_compress_level = true; 915 params->compress_level = s->parameters.compress_level; 916 params->has_compress_threads = true; 917 params->compress_threads = s->parameters.compress_threads; 918 params->has_compress_wait_thread = true; 919 params->compress_wait_thread = s->parameters.compress_wait_thread; 920 params->has_decompress_threads = true; 921 params->decompress_threads = s->parameters.decompress_threads; 922 params->has_throttle_trigger_threshold = true; 923 params->throttle_trigger_threshold = s->parameters.throttle_trigger_threshold; 924 params->has_cpu_throttle_initial = true; 925 params->cpu_throttle_initial = s->parameters.cpu_throttle_initial; 926 params->has_cpu_throttle_increment = true; 927 params->cpu_throttle_increment = s->parameters.cpu_throttle_increment; 928 params->has_cpu_throttle_tailslow = true; 929 params->cpu_throttle_tailslow = s->parameters.cpu_throttle_tailslow; 930 params->tls_creds = g_strdup(s->parameters.tls_creds); 931 params->tls_hostname = g_strdup(s->parameters.tls_hostname); 932 params->tls_authz = g_strdup(s->parameters.tls_authz ? 933 s->parameters.tls_authz : ""); 934 params->has_max_bandwidth = true; 935 params->max_bandwidth = s->parameters.max_bandwidth; 936 params->has_avail_switchover_bandwidth = true; 937 params->avail_switchover_bandwidth = s->parameters.avail_switchover_bandwidth; 938 params->has_downtime_limit = true; 939 params->downtime_limit = s->parameters.downtime_limit; 940 params->has_x_checkpoint_delay = true; 941 params->x_checkpoint_delay = s->parameters.x_checkpoint_delay; 942 params->has_block_incremental = true; 943 params->block_incremental = s->parameters.block_incremental; 944 params->has_multifd_channels = true; 945 params->multifd_channels = s->parameters.multifd_channels; 946 params->has_multifd_compression = true; 947 params->multifd_compression = s->parameters.multifd_compression; 948 params->has_multifd_zlib_level = true; 949 params->multifd_zlib_level = s->parameters.multifd_zlib_level; 950 params->has_multifd_zstd_level = true; 951 params->multifd_zstd_level = s->parameters.multifd_zstd_level; 952 params->has_xbzrle_cache_size = true; 953 params->xbzrle_cache_size = s->parameters.xbzrle_cache_size; 954 params->has_max_postcopy_bandwidth = true; 955 params->max_postcopy_bandwidth = s->parameters.max_postcopy_bandwidth; 956 params->has_max_cpu_throttle = true; 957 params->max_cpu_throttle = s->parameters.max_cpu_throttle; 958 params->has_announce_initial = true; 959 params->announce_initial = s->parameters.announce_initial; 960 params->has_announce_max = true; 961 params->announce_max = s->parameters.announce_max; 962 params->has_announce_rounds = true; 963 params->announce_rounds = s->parameters.announce_rounds; 964 params->has_announce_step = true; 965 params->announce_step = s->parameters.announce_step; 966 967 if (s->parameters.has_block_bitmap_mapping) { 968 params->has_block_bitmap_mapping = true; 969 params->block_bitmap_mapping = 970 QAPI_CLONE(BitmapMigrationNodeAliasList, 971 s->parameters.block_bitmap_mapping); 972 } 973 974 params->has_x_vcpu_dirty_limit_period = true; 975 params->x_vcpu_dirty_limit_period = s->parameters.x_vcpu_dirty_limit_period; 976 params->has_vcpu_dirty_limit = true; 977 params->vcpu_dirty_limit = s->parameters.vcpu_dirty_limit; 978 979 return params; 980 } 981 982 void migrate_params_init(MigrationParameters *params) 983 { 984 params->tls_hostname = g_strdup(""); 985 params->tls_creds = g_strdup(""); 986 987 /* Set has_* up only for parameter checks */ 988 params->has_compress_level = true; 989 params->has_compress_threads = true; 990 params->has_compress_wait_thread = true; 991 params->has_decompress_threads = true; 992 params->has_throttle_trigger_threshold = true; 993 params->has_cpu_throttle_initial = true; 994 params->has_cpu_throttle_increment = true; 995 params->has_cpu_throttle_tailslow = true; 996 params->has_max_bandwidth = true; 997 params->has_downtime_limit = true; 998 params->has_x_checkpoint_delay = true; 999 params->has_block_incremental = true; 1000 params->has_multifd_channels = true; 1001 params->has_multifd_compression = true; 1002 params->has_multifd_zlib_level = true; 1003 params->has_multifd_zstd_level = true; 1004 params->has_xbzrle_cache_size = true; 1005 params->has_max_postcopy_bandwidth = true; 1006 params->has_max_cpu_throttle = true; 1007 params->has_announce_initial = true; 1008 params->has_announce_max = true; 1009 params->has_announce_rounds = true; 1010 params->has_announce_step = true; 1011 params->has_x_vcpu_dirty_limit_period = true; 1012 params->has_vcpu_dirty_limit = true; 1013 } 1014 1015 /* 1016 * Check whether the parameters are valid. Error will be put into errp 1017 * (if provided). Return true if valid, otherwise false. 1018 */ 1019 bool migrate_params_check(MigrationParameters *params, Error **errp) 1020 { 1021 if (params->has_compress_level && 1022 (params->compress_level > 9)) { 1023 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level", 1024 "a value between 0 and 9"); 1025 return false; 1026 } 1027 1028 if (params->has_compress_threads && (params->compress_threads < 1)) { 1029 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1030 "compress_threads", 1031 "a value between 1 and 255"); 1032 return false; 1033 } 1034 1035 if (params->has_decompress_threads && (params->decompress_threads < 1)) { 1036 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1037 "decompress_threads", 1038 "a value between 1 and 255"); 1039 return false; 1040 } 1041 1042 if (params->has_throttle_trigger_threshold && 1043 (params->throttle_trigger_threshold < 1 || 1044 params->throttle_trigger_threshold > 100)) { 1045 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1046 "throttle_trigger_threshold", 1047 "an integer in the range of 1 to 100"); 1048 return false; 1049 } 1050 1051 if (params->has_cpu_throttle_initial && 1052 (params->cpu_throttle_initial < 1 || 1053 params->cpu_throttle_initial > 99)) { 1054 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1055 "cpu_throttle_initial", 1056 "an integer in the range of 1 to 99"); 1057 return false; 1058 } 1059 1060 if (params->has_cpu_throttle_increment && 1061 (params->cpu_throttle_increment < 1 || 1062 params->cpu_throttle_increment > 99)) { 1063 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1064 "cpu_throttle_increment", 1065 "an integer in the range of 1 to 99"); 1066 return false; 1067 } 1068 1069 if (params->has_max_bandwidth && (params->max_bandwidth > SIZE_MAX)) { 1070 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1071 "max_bandwidth", 1072 "an integer in the range of 0 to "stringify(SIZE_MAX) 1073 " bytes/second"); 1074 return false; 1075 } 1076 1077 if (params->has_avail_switchover_bandwidth && 1078 (params->avail_switchover_bandwidth > SIZE_MAX)) { 1079 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1080 "avail_switchover_bandwidth", 1081 "an integer in the range of 0 to "stringify(SIZE_MAX) 1082 " bytes/second"); 1083 return false; 1084 } 1085 1086 if (params->has_downtime_limit && 1087 (params->downtime_limit > MAX_MIGRATE_DOWNTIME)) { 1088 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1089 "downtime_limit", 1090 "an integer in the range of 0 to " 1091 stringify(MAX_MIGRATE_DOWNTIME)" ms"); 1092 return false; 1093 } 1094 1095 /* x_checkpoint_delay is now always positive */ 1096 1097 if (params->has_multifd_channels && (params->multifd_channels < 1)) { 1098 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1099 "multifd_channels", 1100 "a value between 1 and 255"); 1101 return false; 1102 } 1103 1104 if (params->has_multifd_zlib_level && 1105 (params->multifd_zlib_level > 9)) { 1106 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zlib_level", 1107 "a value between 0 and 9"); 1108 return false; 1109 } 1110 1111 if (params->has_multifd_zstd_level && 1112 (params->multifd_zstd_level > 20)) { 1113 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zstd_level", 1114 "a value between 0 and 20"); 1115 return false; 1116 } 1117 1118 if (params->has_xbzrle_cache_size && 1119 (params->xbzrle_cache_size < qemu_target_page_size() || 1120 !is_power_of_2(params->xbzrle_cache_size))) { 1121 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1122 "xbzrle_cache_size", 1123 "a power of two no less than the target page size"); 1124 return false; 1125 } 1126 1127 if (params->has_max_cpu_throttle && 1128 (params->max_cpu_throttle < params->cpu_throttle_initial || 1129 params->max_cpu_throttle > 99)) { 1130 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1131 "max_cpu_throttle", 1132 "an integer in the range of cpu_throttle_initial to 99"); 1133 return false; 1134 } 1135 1136 if (params->has_announce_initial && 1137 params->announce_initial > 100000) { 1138 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1139 "announce_initial", 1140 "a value between 0 and 100000"); 1141 return false; 1142 } 1143 if (params->has_announce_max && 1144 params->announce_max > 100000) { 1145 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1146 "announce_max", 1147 "a value between 0 and 100000"); 1148 return false; 1149 } 1150 if (params->has_announce_rounds && 1151 params->announce_rounds > 1000) { 1152 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1153 "announce_rounds", 1154 "a value between 0 and 1000"); 1155 return false; 1156 } 1157 if (params->has_announce_step && 1158 (params->announce_step < 1 || 1159 params->announce_step > 10000)) { 1160 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1161 "announce_step", 1162 "a value between 0 and 10000"); 1163 return false; 1164 } 1165 1166 if (params->has_block_bitmap_mapping && 1167 !check_dirty_bitmap_mig_alias_map(params->block_bitmap_mapping, errp)) { 1168 error_prepend(errp, "Invalid mapping given for block-bitmap-mapping: "); 1169 return false; 1170 } 1171 1172 #ifdef CONFIG_LINUX 1173 if (migrate_zero_copy_send() && 1174 ((params->has_multifd_compression && params->multifd_compression) || 1175 (params->tls_creds && *params->tls_creds))) { 1176 error_setg(errp, 1177 "Zero copy only available for non-compressed non-TLS multifd migration"); 1178 return false; 1179 } 1180 #endif 1181 1182 if (params->has_x_vcpu_dirty_limit_period && 1183 (params->x_vcpu_dirty_limit_period < 1 || 1184 params->x_vcpu_dirty_limit_period > 1000)) { 1185 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1186 "x-vcpu-dirty-limit-period", 1187 "a value between 1 and 1000"); 1188 return false; 1189 } 1190 1191 if (params->has_vcpu_dirty_limit && 1192 (params->vcpu_dirty_limit < 1)) { 1193 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1194 "vcpu_dirty_limit", 1195 "is invalid, it must greater then 1 MB/s"); 1196 return false; 1197 } 1198 1199 return true; 1200 } 1201 1202 static void migrate_params_test_apply(MigrateSetParameters *params, 1203 MigrationParameters *dest) 1204 { 1205 *dest = migrate_get_current()->parameters; 1206 1207 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 1208 1209 if (params->has_compress_level) { 1210 dest->compress_level = params->compress_level; 1211 } 1212 1213 if (params->has_compress_threads) { 1214 dest->compress_threads = params->compress_threads; 1215 } 1216 1217 if (params->has_compress_wait_thread) { 1218 dest->compress_wait_thread = params->compress_wait_thread; 1219 } 1220 1221 if (params->has_decompress_threads) { 1222 dest->decompress_threads = params->decompress_threads; 1223 } 1224 1225 if (params->has_throttle_trigger_threshold) { 1226 dest->throttle_trigger_threshold = params->throttle_trigger_threshold; 1227 } 1228 1229 if (params->has_cpu_throttle_initial) { 1230 dest->cpu_throttle_initial = params->cpu_throttle_initial; 1231 } 1232 1233 if (params->has_cpu_throttle_increment) { 1234 dest->cpu_throttle_increment = params->cpu_throttle_increment; 1235 } 1236 1237 if (params->has_cpu_throttle_tailslow) { 1238 dest->cpu_throttle_tailslow = params->cpu_throttle_tailslow; 1239 } 1240 1241 if (params->tls_creds) { 1242 assert(params->tls_creds->type == QTYPE_QSTRING); 1243 dest->tls_creds = params->tls_creds->u.s; 1244 } 1245 1246 if (params->tls_hostname) { 1247 assert(params->tls_hostname->type == QTYPE_QSTRING); 1248 dest->tls_hostname = params->tls_hostname->u.s; 1249 } 1250 1251 if (params->has_max_bandwidth) { 1252 dest->max_bandwidth = params->max_bandwidth; 1253 } 1254 1255 if (params->has_avail_switchover_bandwidth) { 1256 dest->avail_switchover_bandwidth = params->avail_switchover_bandwidth; 1257 } 1258 1259 if (params->has_downtime_limit) { 1260 dest->downtime_limit = params->downtime_limit; 1261 } 1262 1263 if (params->has_x_checkpoint_delay) { 1264 dest->x_checkpoint_delay = params->x_checkpoint_delay; 1265 } 1266 1267 if (params->has_block_incremental) { 1268 dest->block_incremental = params->block_incremental; 1269 } 1270 if (params->has_multifd_channels) { 1271 dest->multifd_channels = params->multifd_channels; 1272 } 1273 if (params->has_multifd_compression) { 1274 dest->multifd_compression = params->multifd_compression; 1275 } 1276 if (params->has_xbzrle_cache_size) { 1277 dest->xbzrle_cache_size = params->xbzrle_cache_size; 1278 } 1279 if (params->has_max_postcopy_bandwidth) { 1280 dest->max_postcopy_bandwidth = params->max_postcopy_bandwidth; 1281 } 1282 if (params->has_max_cpu_throttle) { 1283 dest->max_cpu_throttle = params->max_cpu_throttle; 1284 } 1285 if (params->has_announce_initial) { 1286 dest->announce_initial = params->announce_initial; 1287 } 1288 if (params->has_announce_max) { 1289 dest->announce_max = params->announce_max; 1290 } 1291 if (params->has_announce_rounds) { 1292 dest->announce_rounds = params->announce_rounds; 1293 } 1294 if (params->has_announce_step) { 1295 dest->announce_step = params->announce_step; 1296 } 1297 1298 if (params->has_block_bitmap_mapping) { 1299 dest->has_block_bitmap_mapping = true; 1300 dest->block_bitmap_mapping = params->block_bitmap_mapping; 1301 } 1302 1303 if (params->has_x_vcpu_dirty_limit_period) { 1304 dest->x_vcpu_dirty_limit_period = 1305 params->x_vcpu_dirty_limit_period; 1306 } 1307 if (params->has_vcpu_dirty_limit) { 1308 dest->vcpu_dirty_limit = params->vcpu_dirty_limit; 1309 } 1310 } 1311 1312 static void migrate_params_apply(MigrateSetParameters *params, Error **errp) 1313 { 1314 MigrationState *s = migrate_get_current(); 1315 1316 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 1317 1318 if (params->has_compress_level) { 1319 s->parameters.compress_level = params->compress_level; 1320 } 1321 1322 if (params->has_compress_threads) { 1323 s->parameters.compress_threads = params->compress_threads; 1324 } 1325 1326 if (params->has_compress_wait_thread) { 1327 s->parameters.compress_wait_thread = params->compress_wait_thread; 1328 } 1329 1330 if (params->has_decompress_threads) { 1331 s->parameters.decompress_threads = params->decompress_threads; 1332 } 1333 1334 if (params->has_throttle_trigger_threshold) { 1335 s->parameters.throttle_trigger_threshold = params->throttle_trigger_threshold; 1336 } 1337 1338 if (params->has_cpu_throttle_initial) { 1339 s->parameters.cpu_throttle_initial = params->cpu_throttle_initial; 1340 } 1341 1342 if (params->has_cpu_throttle_increment) { 1343 s->parameters.cpu_throttle_increment = params->cpu_throttle_increment; 1344 } 1345 1346 if (params->has_cpu_throttle_tailslow) { 1347 s->parameters.cpu_throttle_tailslow = params->cpu_throttle_tailslow; 1348 } 1349 1350 if (params->tls_creds) { 1351 g_free(s->parameters.tls_creds); 1352 assert(params->tls_creds->type == QTYPE_QSTRING); 1353 s->parameters.tls_creds = g_strdup(params->tls_creds->u.s); 1354 } 1355 1356 if (params->tls_hostname) { 1357 g_free(s->parameters.tls_hostname); 1358 assert(params->tls_hostname->type == QTYPE_QSTRING); 1359 s->parameters.tls_hostname = g_strdup(params->tls_hostname->u.s); 1360 } 1361 1362 if (params->tls_authz) { 1363 g_free(s->parameters.tls_authz); 1364 assert(params->tls_authz->type == QTYPE_QSTRING); 1365 s->parameters.tls_authz = g_strdup(params->tls_authz->u.s); 1366 } 1367 1368 if (params->has_max_bandwidth) { 1369 s->parameters.max_bandwidth = params->max_bandwidth; 1370 if (s->to_dst_file && !migration_in_postcopy()) { 1371 migration_rate_set(s->parameters.max_bandwidth); 1372 } 1373 } 1374 1375 if (params->has_avail_switchover_bandwidth) { 1376 s->parameters.avail_switchover_bandwidth = params->avail_switchover_bandwidth; 1377 } 1378 1379 if (params->has_downtime_limit) { 1380 s->parameters.downtime_limit = params->downtime_limit; 1381 } 1382 1383 if (params->has_x_checkpoint_delay) { 1384 s->parameters.x_checkpoint_delay = params->x_checkpoint_delay; 1385 colo_checkpoint_delay_set(); 1386 } 1387 1388 if (params->has_block_incremental) { 1389 s->parameters.block_incremental = params->block_incremental; 1390 } 1391 if (params->has_multifd_channels) { 1392 s->parameters.multifd_channels = params->multifd_channels; 1393 } 1394 if (params->has_multifd_compression) { 1395 s->parameters.multifd_compression = params->multifd_compression; 1396 } 1397 if (params->has_xbzrle_cache_size) { 1398 s->parameters.xbzrle_cache_size = params->xbzrle_cache_size; 1399 xbzrle_cache_resize(params->xbzrle_cache_size, errp); 1400 } 1401 if (params->has_max_postcopy_bandwidth) { 1402 s->parameters.max_postcopy_bandwidth = params->max_postcopy_bandwidth; 1403 if (s->to_dst_file && migration_in_postcopy()) { 1404 migration_rate_set(s->parameters.max_postcopy_bandwidth); 1405 } 1406 } 1407 if (params->has_max_cpu_throttle) { 1408 s->parameters.max_cpu_throttle = params->max_cpu_throttle; 1409 } 1410 if (params->has_announce_initial) { 1411 s->parameters.announce_initial = params->announce_initial; 1412 } 1413 if (params->has_announce_max) { 1414 s->parameters.announce_max = params->announce_max; 1415 } 1416 if (params->has_announce_rounds) { 1417 s->parameters.announce_rounds = params->announce_rounds; 1418 } 1419 if (params->has_announce_step) { 1420 s->parameters.announce_step = params->announce_step; 1421 } 1422 1423 if (params->has_block_bitmap_mapping) { 1424 qapi_free_BitmapMigrationNodeAliasList( 1425 s->parameters.block_bitmap_mapping); 1426 1427 s->parameters.has_block_bitmap_mapping = true; 1428 s->parameters.block_bitmap_mapping = 1429 QAPI_CLONE(BitmapMigrationNodeAliasList, 1430 params->block_bitmap_mapping); 1431 } 1432 1433 if (params->has_x_vcpu_dirty_limit_period) { 1434 s->parameters.x_vcpu_dirty_limit_period = 1435 params->x_vcpu_dirty_limit_period; 1436 } 1437 if (params->has_vcpu_dirty_limit) { 1438 s->parameters.vcpu_dirty_limit = params->vcpu_dirty_limit; 1439 } 1440 } 1441 1442 void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp) 1443 { 1444 MigrationParameters tmp; 1445 1446 /* TODO Rewrite "" to null instead for all three tls_* parameters */ 1447 if (params->tls_creds 1448 && params->tls_creds->type == QTYPE_QNULL) { 1449 qobject_unref(params->tls_creds->u.n); 1450 params->tls_creds->type = QTYPE_QSTRING; 1451 params->tls_creds->u.s = strdup(""); 1452 } 1453 if (params->tls_hostname 1454 && params->tls_hostname->type == QTYPE_QNULL) { 1455 qobject_unref(params->tls_hostname->u.n); 1456 params->tls_hostname->type = QTYPE_QSTRING; 1457 params->tls_hostname->u.s = strdup(""); 1458 } 1459 if (params->tls_authz 1460 && params->tls_authz->type == QTYPE_QNULL) { 1461 qobject_unref(params->tls_authz->u.n); 1462 params->tls_authz->type = QTYPE_QSTRING; 1463 params->tls_authz->u.s = strdup(""); 1464 } 1465 1466 migrate_params_test_apply(params, &tmp); 1467 1468 if (!migrate_params_check(&tmp, errp)) { 1469 /* Invalid parameter */ 1470 return; 1471 } 1472 1473 migrate_params_apply(params, errp); 1474 } 1475