1 /* 2 * QEMU migration capabilities 3 * 4 * Copyright (c) 2012-2023 Red Hat Inc 5 * 6 * Authors: 7 * Orit Wasserman <owasserm@redhat.com> 8 * Juan Quintela <quintela@redhat.com> 9 * 10 * This work is licensed under the terms of the GNU GPL, version 2 or later. 11 * See the COPYING file in the top-level directory. 12 */ 13 14 #include "qemu/osdep.h" 15 #include "qemu/error-report.h" 16 #include "exec/target_page.h" 17 #include "qapi/clone-visitor.h" 18 #include "qapi/error.h" 19 #include "qapi/qapi-commands-migration.h" 20 #include "qapi/qapi-visit-migration.h" 21 #include "qapi/qmp/qerror.h" 22 #include "qapi/qmp/qnull.h" 23 #include "sysemu/runstate.h" 24 #include "migration/colo.h" 25 #include "migration/misc.h" 26 #include "migration.h" 27 #include "migration-stats.h" 28 #include "qemu-file.h" 29 #include "ram.h" 30 #include "options.h" 31 #include "sysemu/kvm.h" 32 33 /* Maximum migrate downtime set to 2000 seconds */ 34 #define MAX_MIGRATE_DOWNTIME_SECONDS 2000 35 #define MAX_MIGRATE_DOWNTIME (MAX_MIGRATE_DOWNTIME_SECONDS * 1000) 36 37 #define MAX_THROTTLE (128 << 20) /* Migration transfer speed throttling */ 38 39 /* Time in milliseconds we are allowed to stop the source, 40 * for sending the last part */ 41 #define DEFAULT_MIGRATE_SET_DOWNTIME 300 42 43 /* Default compression thread count */ 44 #define DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT 8 45 /* Default decompression thread count, usually decompression is at 46 * least 4 times as fast as compression.*/ 47 #define DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT 2 48 /*0: means nocompress, 1: best speed, ... 9: best compress ratio */ 49 #define DEFAULT_MIGRATE_COMPRESS_LEVEL 1 50 /* Define default autoconverge cpu throttle migration parameters */ 51 #define DEFAULT_MIGRATE_THROTTLE_TRIGGER_THRESHOLD 50 52 #define DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL 20 53 #define DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT 10 54 #define DEFAULT_MIGRATE_MAX_CPU_THROTTLE 99 55 56 /* Migration XBZRLE default cache size */ 57 #define DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE (64 * 1024 * 1024) 58 59 /* The delay time (in ms) between two COLO checkpoints */ 60 #define DEFAULT_MIGRATE_X_CHECKPOINT_DELAY (200 * 100) 61 #define DEFAULT_MIGRATE_MULTIFD_CHANNELS 2 62 #define DEFAULT_MIGRATE_MULTIFD_COMPRESSION MULTIFD_COMPRESSION_NONE 63 /* 0: means nocompress, 1: best speed, ... 9: best compress ratio */ 64 #define DEFAULT_MIGRATE_MULTIFD_ZLIB_LEVEL 1 65 /* 0: means nocompress, 1: best speed, ... 20: best compress ratio */ 66 #define DEFAULT_MIGRATE_MULTIFD_ZSTD_LEVEL 1 67 68 /* Background transfer rate for postcopy, 0 means unlimited, note 69 * that page requests can still exceed this limit. 70 */ 71 #define DEFAULT_MIGRATE_MAX_POSTCOPY_BANDWIDTH 0 72 73 /* 74 * Parameters for self_announce_delay giving a stream of RARP/ARP 75 * packets after migration. 76 */ 77 #define DEFAULT_MIGRATE_ANNOUNCE_INITIAL 50 78 #define DEFAULT_MIGRATE_ANNOUNCE_MAX 550 79 #define DEFAULT_MIGRATE_ANNOUNCE_ROUNDS 5 80 #define DEFAULT_MIGRATE_ANNOUNCE_STEP 100 81 82 #define DEFINE_PROP_MIG_CAP(name, x) \ 83 DEFINE_PROP_BOOL(name, MigrationState, capabilities[x], false) 84 85 #define DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT_PERIOD 1000 /* milliseconds */ 86 #define DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT 1 /* MB/s */ 87 88 Property migration_properties[] = { 89 DEFINE_PROP_BOOL("store-global-state", MigrationState, 90 store_global_state, true), 91 DEFINE_PROP_BOOL("send-configuration", MigrationState, 92 send_configuration, true), 93 DEFINE_PROP_BOOL("send-section-footer", MigrationState, 94 send_section_footer, true), 95 DEFINE_PROP_BOOL("decompress-error-check", MigrationState, 96 decompress_error_check, true), 97 DEFINE_PROP_BOOL("multifd-flush-after-each-section", MigrationState, 98 multifd_flush_after_each_section, false), 99 DEFINE_PROP_UINT8("x-clear-bitmap-shift", MigrationState, 100 clear_bitmap_shift, CLEAR_BITMAP_SHIFT_DEFAULT), 101 DEFINE_PROP_BOOL("x-preempt-pre-7-2", MigrationState, 102 preempt_pre_7_2, false), 103 104 /* Migration parameters */ 105 DEFINE_PROP_UINT8("x-compress-level", MigrationState, 106 parameters.compress_level, 107 DEFAULT_MIGRATE_COMPRESS_LEVEL), 108 DEFINE_PROP_UINT8("x-compress-threads", MigrationState, 109 parameters.compress_threads, 110 DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT), 111 DEFINE_PROP_BOOL("x-compress-wait-thread", MigrationState, 112 parameters.compress_wait_thread, true), 113 DEFINE_PROP_UINT8("x-decompress-threads", MigrationState, 114 parameters.decompress_threads, 115 DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT), 116 DEFINE_PROP_UINT8("x-throttle-trigger-threshold", MigrationState, 117 parameters.throttle_trigger_threshold, 118 DEFAULT_MIGRATE_THROTTLE_TRIGGER_THRESHOLD), 119 DEFINE_PROP_UINT8("x-cpu-throttle-initial", MigrationState, 120 parameters.cpu_throttle_initial, 121 DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL), 122 DEFINE_PROP_UINT8("x-cpu-throttle-increment", MigrationState, 123 parameters.cpu_throttle_increment, 124 DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT), 125 DEFINE_PROP_BOOL("x-cpu-throttle-tailslow", MigrationState, 126 parameters.cpu_throttle_tailslow, false), 127 DEFINE_PROP_SIZE("x-max-bandwidth", MigrationState, 128 parameters.max_bandwidth, MAX_THROTTLE), 129 DEFINE_PROP_SIZE("avail-switchover-bandwidth", MigrationState, 130 parameters.avail_switchover_bandwidth, 0), 131 DEFINE_PROP_UINT64("x-downtime-limit", MigrationState, 132 parameters.downtime_limit, 133 DEFAULT_MIGRATE_SET_DOWNTIME), 134 DEFINE_PROP_UINT32("x-checkpoint-delay", MigrationState, 135 parameters.x_checkpoint_delay, 136 DEFAULT_MIGRATE_X_CHECKPOINT_DELAY), 137 DEFINE_PROP_UINT8("multifd-channels", MigrationState, 138 parameters.multifd_channels, 139 DEFAULT_MIGRATE_MULTIFD_CHANNELS), 140 DEFINE_PROP_MULTIFD_COMPRESSION("multifd-compression", MigrationState, 141 parameters.multifd_compression, 142 DEFAULT_MIGRATE_MULTIFD_COMPRESSION), 143 DEFINE_PROP_UINT8("multifd-zlib-level", MigrationState, 144 parameters.multifd_zlib_level, 145 DEFAULT_MIGRATE_MULTIFD_ZLIB_LEVEL), 146 DEFINE_PROP_UINT8("multifd-zstd-level", MigrationState, 147 parameters.multifd_zstd_level, 148 DEFAULT_MIGRATE_MULTIFD_ZSTD_LEVEL), 149 DEFINE_PROP_SIZE("xbzrle-cache-size", MigrationState, 150 parameters.xbzrle_cache_size, 151 DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE), 152 DEFINE_PROP_SIZE("max-postcopy-bandwidth", MigrationState, 153 parameters.max_postcopy_bandwidth, 154 DEFAULT_MIGRATE_MAX_POSTCOPY_BANDWIDTH), 155 DEFINE_PROP_UINT8("max-cpu-throttle", MigrationState, 156 parameters.max_cpu_throttle, 157 DEFAULT_MIGRATE_MAX_CPU_THROTTLE), 158 DEFINE_PROP_SIZE("announce-initial", MigrationState, 159 parameters.announce_initial, 160 DEFAULT_MIGRATE_ANNOUNCE_INITIAL), 161 DEFINE_PROP_SIZE("announce-max", MigrationState, 162 parameters.announce_max, 163 DEFAULT_MIGRATE_ANNOUNCE_MAX), 164 DEFINE_PROP_SIZE("announce-rounds", MigrationState, 165 parameters.announce_rounds, 166 DEFAULT_MIGRATE_ANNOUNCE_ROUNDS), 167 DEFINE_PROP_SIZE("announce-step", MigrationState, 168 parameters.announce_step, 169 DEFAULT_MIGRATE_ANNOUNCE_STEP), 170 DEFINE_PROP_STRING("tls-creds", MigrationState, parameters.tls_creds), 171 DEFINE_PROP_STRING("tls-hostname", MigrationState, parameters.tls_hostname), 172 DEFINE_PROP_STRING("tls-authz", MigrationState, parameters.tls_authz), 173 DEFINE_PROP_UINT64("x-vcpu-dirty-limit-period", MigrationState, 174 parameters.x_vcpu_dirty_limit_period, 175 DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT_PERIOD), 176 DEFINE_PROP_UINT64("vcpu-dirty-limit", MigrationState, 177 parameters.vcpu_dirty_limit, 178 DEFAULT_MIGRATE_VCPU_DIRTY_LIMIT), 179 DEFINE_PROP_MIG_MODE("mode", MigrationState, 180 parameters.mode, 181 MIG_MODE_NORMAL), 182 DEFINE_PROP_ZERO_PAGE_DETECTION("zero-page-detection", MigrationState, 183 parameters.zero_page_detection, 184 ZERO_PAGE_DETECTION_MULTIFD), 185 186 /* Migration capabilities */ 187 DEFINE_PROP_MIG_CAP("x-xbzrle", MIGRATION_CAPABILITY_XBZRLE), 188 DEFINE_PROP_MIG_CAP("x-rdma-pin-all", MIGRATION_CAPABILITY_RDMA_PIN_ALL), 189 DEFINE_PROP_MIG_CAP("x-auto-converge", MIGRATION_CAPABILITY_AUTO_CONVERGE), 190 DEFINE_PROP_MIG_CAP("x-zero-blocks", MIGRATION_CAPABILITY_ZERO_BLOCKS), 191 DEFINE_PROP_MIG_CAP("x-compress", MIGRATION_CAPABILITY_COMPRESS), 192 DEFINE_PROP_MIG_CAP("x-events", MIGRATION_CAPABILITY_EVENTS), 193 DEFINE_PROP_MIG_CAP("x-postcopy-ram", MIGRATION_CAPABILITY_POSTCOPY_RAM), 194 DEFINE_PROP_MIG_CAP("x-postcopy-preempt", 195 MIGRATION_CAPABILITY_POSTCOPY_PREEMPT), 196 DEFINE_PROP_MIG_CAP("x-colo", MIGRATION_CAPABILITY_X_COLO), 197 DEFINE_PROP_MIG_CAP("x-release-ram", MIGRATION_CAPABILITY_RELEASE_RAM), 198 DEFINE_PROP_MIG_CAP("x-block", MIGRATION_CAPABILITY_BLOCK), 199 DEFINE_PROP_MIG_CAP("x-return-path", MIGRATION_CAPABILITY_RETURN_PATH), 200 DEFINE_PROP_MIG_CAP("x-multifd", MIGRATION_CAPABILITY_MULTIFD), 201 DEFINE_PROP_MIG_CAP("x-background-snapshot", 202 MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT), 203 #ifdef CONFIG_LINUX 204 DEFINE_PROP_MIG_CAP("x-zero-copy-send", 205 MIGRATION_CAPABILITY_ZERO_COPY_SEND), 206 #endif 207 DEFINE_PROP_MIG_CAP("x-switchover-ack", 208 MIGRATION_CAPABILITY_SWITCHOVER_ACK), 209 DEFINE_PROP_MIG_CAP("x-dirty-limit", MIGRATION_CAPABILITY_DIRTY_LIMIT), 210 DEFINE_PROP_MIG_CAP("mapped-ram", MIGRATION_CAPABILITY_MAPPED_RAM), 211 DEFINE_PROP_END_OF_LIST(), 212 }; 213 214 bool migrate_auto_converge(void) 215 { 216 MigrationState *s = migrate_get_current(); 217 218 return s->capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; 219 } 220 221 bool migrate_background_snapshot(void) 222 { 223 MigrationState *s = migrate_get_current(); 224 225 return s->capabilities[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]; 226 } 227 228 bool migrate_block(void) 229 { 230 MigrationState *s = migrate_get_current(); 231 232 return s->capabilities[MIGRATION_CAPABILITY_BLOCK]; 233 } 234 235 bool migrate_colo(void) 236 { 237 MigrationState *s = migrate_get_current(); 238 239 return s->capabilities[MIGRATION_CAPABILITY_X_COLO]; 240 } 241 242 bool migrate_compress(void) 243 { 244 MigrationState *s = migrate_get_current(); 245 246 return s->capabilities[MIGRATION_CAPABILITY_COMPRESS]; 247 } 248 249 bool migrate_dirty_bitmaps(void) 250 { 251 MigrationState *s = migrate_get_current(); 252 253 return s->capabilities[MIGRATION_CAPABILITY_DIRTY_BITMAPS]; 254 } 255 256 bool migrate_dirty_limit(void) 257 { 258 MigrationState *s = migrate_get_current(); 259 260 return s->capabilities[MIGRATION_CAPABILITY_DIRTY_LIMIT]; 261 } 262 263 bool migrate_events(void) 264 { 265 MigrationState *s = migrate_get_current(); 266 267 return s->capabilities[MIGRATION_CAPABILITY_EVENTS]; 268 } 269 270 bool migrate_mapped_ram(void) 271 { 272 MigrationState *s = migrate_get_current(); 273 274 return s->capabilities[MIGRATION_CAPABILITY_MAPPED_RAM]; 275 } 276 277 bool migrate_ignore_shared(void) 278 { 279 MigrationState *s = migrate_get_current(); 280 281 return s->capabilities[MIGRATION_CAPABILITY_X_IGNORE_SHARED]; 282 } 283 284 bool migrate_late_block_activate(void) 285 { 286 MigrationState *s = migrate_get_current(); 287 288 return s->capabilities[MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE]; 289 } 290 291 bool migrate_multifd(void) 292 { 293 MigrationState *s = migrate_get_current(); 294 295 return s->capabilities[MIGRATION_CAPABILITY_MULTIFD]; 296 } 297 298 bool migrate_pause_before_switchover(void) 299 { 300 MigrationState *s = migrate_get_current(); 301 302 return s->capabilities[MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER]; 303 } 304 305 bool migrate_postcopy_blocktime(void) 306 { 307 MigrationState *s = migrate_get_current(); 308 309 return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME]; 310 } 311 312 bool migrate_postcopy_preempt(void) 313 { 314 MigrationState *s = migrate_get_current(); 315 316 return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT]; 317 } 318 319 bool migrate_postcopy_ram(void) 320 { 321 MigrationState *s = migrate_get_current(); 322 323 return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM]; 324 } 325 326 bool migrate_rdma_pin_all(void) 327 { 328 MigrationState *s = migrate_get_current(); 329 330 return s->capabilities[MIGRATION_CAPABILITY_RDMA_PIN_ALL]; 331 } 332 333 bool migrate_release_ram(void) 334 { 335 MigrationState *s = migrate_get_current(); 336 337 return s->capabilities[MIGRATION_CAPABILITY_RELEASE_RAM]; 338 } 339 340 bool migrate_return_path(void) 341 { 342 MigrationState *s = migrate_get_current(); 343 344 return s->capabilities[MIGRATION_CAPABILITY_RETURN_PATH]; 345 } 346 347 bool migrate_switchover_ack(void) 348 { 349 MigrationState *s = migrate_get_current(); 350 351 return s->capabilities[MIGRATION_CAPABILITY_SWITCHOVER_ACK]; 352 } 353 354 bool migrate_validate_uuid(void) 355 { 356 MigrationState *s = migrate_get_current(); 357 358 return s->capabilities[MIGRATION_CAPABILITY_VALIDATE_UUID]; 359 } 360 361 bool migrate_xbzrle(void) 362 { 363 MigrationState *s = migrate_get_current(); 364 365 return s->capabilities[MIGRATION_CAPABILITY_XBZRLE]; 366 } 367 368 bool migrate_zero_blocks(void) 369 { 370 MigrationState *s = migrate_get_current(); 371 372 return s->capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS]; 373 } 374 375 bool migrate_zero_copy_send(void) 376 { 377 MigrationState *s = migrate_get_current(); 378 379 return s->capabilities[MIGRATION_CAPABILITY_ZERO_COPY_SEND]; 380 } 381 382 /* pseudo capabilities */ 383 384 bool migrate_multifd_flush_after_each_section(void) 385 { 386 MigrationState *s = migrate_get_current(); 387 388 return s->multifd_flush_after_each_section; 389 } 390 391 bool migrate_postcopy(void) 392 { 393 return migrate_postcopy_ram() || migrate_dirty_bitmaps(); 394 } 395 396 bool migrate_rdma(void) 397 { 398 MigrationState *s = migrate_get_current(); 399 400 return s->rdma_migration; 401 } 402 403 bool migrate_tls(void) 404 { 405 MigrationState *s = migrate_get_current(); 406 407 return s->parameters.tls_creds && *s->parameters.tls_creds; 408 } 409 410 typedef enum WriteTrackingSupport { 411 WT_SUPPORT_UNKNOWN = 0, 412 WT_SUPPORT_ABSENT, 413 WT_SUPPORT_AVAILABLE, 414 WT_SUPPORT_COMPATIBLE 415 } WriteTrackingSupport; 416 417 static 418 WriteTrackingSupport migrate_query_write_tracking(void) 419 { 420 /* Check if kernel supports required UFFD features */ 421 if (!ram_write_tracking_available()) { 422 return WT_SUPPORT_ABSENT; 423 } 424 /* 425 * Check if current memory configuration is 426 * compatible with required UFFD features. 427 */ 428 if (!ram_write_tracking_compatible()) { 429 return WT_SUPPORT_AVAILABLE; 430 } 431 432 return WT_SUPPORT_COMPATIBLE; 433 } 434 435 /* Migration capabilities set */ 436 struct MigrateCapsSet { 437 int size; /* Capability set size */ 438 MigrationCapability caps[]; /* Variadic array of capabilities */ 439 }; 440 typedef struct MigrateCapsSet MigrateCapsSet; 441 442 /* Define and initialize MigrateCapsSet */ 443 #define INITIALIZE_MIGRATE_CAPS_SET(_name, ...) \ 444 MigrateCapsSet _name = { \ 445 .size = sizeof((int []) { __VA_ARGS__ }) / sizeof(int), \ 446 .caps = { __VA_ARGS__ } \ 447 } 448 449 /* Background-snapshot compatibility check list */ 450 static const 451 INITIALIZE_MIGRATE_CAPS_SET(check_caps_background_snapshot, 452 MIGRATION_CAPABILITY_POSTCOPY_RAM, 453 MIGRATION_CAPABILITY_DIRTY_BITMAPS, 454 MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME, 455 MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE, 456 MIGRATION_CAPABILITY_RETURN_PATH, 457 MIGRATION_CAPABILITY_MULTIFD, 458 MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER, 459 MIGRATION_CAPABILITY_AUTO_CONVERGE, 460 MIGRATION_CAPABILITY_RELEASE_RAM, 461 MIGRATION_CAPABILITY_RDMA_PIN_ALL, 462 MIGRATION_CAPABILITY_COMPRESS, 463 MIGRATION_CAPABILITY_XBZRLE, 464 MIGRATION_CAPABILITY_X_COLO, 465 MIGRATION_CAPABILITY_VALIDATE_UUID, 466 MIGRATION_CAPABILITY_ZERO_COPY_SEND); 467 468 static bool migrate_incoming_started(void) 469 { 470 return !!migration_incoming_get_current()->transport_data; 471 } 472 473 /** 474 * @migration_caps_check - check capability compatibility 475 * 476 * @old_caps: old capability list 477 * @new_caps: new capability list 478 * @errp: set *errp if the check failed, with reason 479 * 480 * Returns true if check passed, otherwise false. 481 */ 482 bool migrate_caps_check(bool *old_caps, bool *new_caps, Error **errp) 483 { 484 ERRP_GUARD(); 485 MigrationIncomingState *mis = migration_incoming_get_current(); 486 487 #ifndef CONFIG_LIVE_BLOCK_MIGRATION 488 if (new_caps[MIGRATION_CAPABILITY_BLOCK]) { 489 error_setg(errp, "QEMU compiled without old-style block migration"); 490 error_append_hint(errp, "Use blockdev-mirror with NBD instead.\n"); 491 return false; 492 } 493 #endif 494 if (new_caps[MIGRATION_CAPABILITY_BLOCK]) { 495 warn_report("block migration is deprecated;" 496 " use blockdev-mirror with NBD instead"); 497 } 498 499 if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) { 500 warn_report("old compression method is deprecated;" 501 " use multifd compression methods instead"); 502 } 503 504 #ifndef CONFIG_REPLICATION 505 if (new_caps[MIGRATION_CAPABILITY_X_COLO]) { 506 error_setg(errp, "QEMU compiled without replication module" 507 " can't enable COLO"); 508 error_append_hint(errp, "Please enable replication before COLO.\n"); 509 return false; 510 } 511 #endif 512 513 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 514 /* This check is reasonably expensive, so only when it's being 515 * set the first time, also it's only the destination that needs 516 * special support. 517 */ 518 if (!old_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM] && 519 runstate_check(RUN_STATE_INMIGRATE) && 520 !postcopy_ram_supported_by_host(mis, errp)) { 521 error_prepend(errp, "Postcopy is not supported: "); 522 return false; 523 } 524 525 if (new_caps[MIGRATION_CAPABILITY_X_IGNORE_SHARED]) { 526 error_setg(errp, "Postcopy is not compatible with ignore-shared"); 527 return false; 528 } 529 530 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 531 error_setg(errp, "Postcopy is not yet compatible with multifd"); 532 return false; 533 } 534 } 535 536 if (new_caps[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]) { 537 WriteTrackingSupport wt_support; 538 int idx; 539 /* 540 * Check if 'background-snapshot' capability is supported by 541 * host kernel and compatible with guest memory configuration. 542 */ 543 wt_support = migrate_query_write_tracking(); 544 if (wt_support < WT_SUPPORT_AVAILABLE) { 545 error_setg(errp, "Background-snapshot is not supported by host kernel"); 546 return false; 547 } 548 if (wt_support < WT_SUPPORT_COMPATIBLE) { 549 error_setg(errp, "Background-snapshot is not compatible " 550 "with guest memory configuration"); 551 return false; 552 } 553 554 /* 555 * Check if there are any migration capabilities 556 * incompatible with 'background-snapshot'. 557 */ 558 for (idx = 0; idx < check_caps_background_snapshot.size; idx++) { 559 int incomp_cap = check_caps_background_snapshot.caps[idx]; 560 if (new_caps[incomp_cap]) { 561 error_setg(errp, 562 "Background-snapshot is not compatible with %s", 563 MigrationCapability_str(incomp_cap)); 564 return false; 565 } 566 } 567 } 568 569 #ifdef CONFIG_LINUX 570 if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND] && 571 (!new_caps[MIGRATION_CAPABILITY_MULTIFD] || 572 new_caps[MIGRATION_CAPABILITY_COMPRESS] || 573 new_caps[MIGRATION_CAPABILITY_XBZRLE] || 574 migrate_multifd_compression() || 575 migrate_tls())) { 576 error_setg(errp, 577 "Zero copy only available for non-compressed non-TLS multifd migration"); 578 return false; 579 } 580 #else 581 if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND]) { 582 error_setg(errp, 583 "Zero copy currently only available on Linux"); 584 return false; 585 } 586 #endif 587 588 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT]) { 589 if (!new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 590 error_setg(errp, "Postcopy preempt requires postcopy-ram"); 591 return false; 592 } 593 594 /* 595 * Preempt mode requires urgent pages to be sent in separate 596 * channel, OTOH compression logic will disorder all pages into 597 * different compression channels, which is not compatible with the 598 * preempt assumptions on channel assignments. 599 */ 600 if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) { 601 error_setg(errp, "Postcopy preempt not compatible with compress"); 602 return false; 603 } 604 605 if (migrate_incoming_started()) { 606 error_setg(errp, 607 "Postcopy preempt must be set before incoming starts"); 608 return false; 609 } 610 } 611 612 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 613 if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) { 614 error_setg(errp, "Multifd is not compatible with compress"); 615 return false; 616 } 617 if (migrate_incoming_started()) { 618 error_setg(errp, "Multifd must be set before incoming starts"); 619 return false; 620 } 621 } 622 623 if (new_caps[MIGRATION_CAPABILITY_SWITCHOVER_ACK]) { 624 if (!new_caps[MIGRATION_CAPABILITY_RETURN_PATH]) { 625 error_setg(errp, "Capability 'switchover-ack' requires capability " 626 "'return-path'"); 627 return false; 628 } 629 } 630 if (new_caps[MIGRATION_CAPABILITY_DIRTY_LIMIT]) { 631 if (new_caps[MIGRATION_CAPABILITY_AUTO_CONVERGE]) { 632 error_setg(errp, "dirty-limit conflicts with auto-converge" 633 " either of then available currently"); 634 return false; 635 } 636 637 if (!kvm_enabled() || !kvm_dirty_ring_enabled()) { 638 error_setg(errp, "dirty-limit requires KVM with accelerator" 639 " property 'dirty-ring-size' set"); 640 return false; 641 } 642 } 643 644 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 645 if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) { 646 error_setg(errp, "Multifd is not compatible with xbzrle"); 647 return false; 648 } 649 } 650 651 if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) { 652 if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) { 653 error_setg(errp, "Compression is not compatible with xbzrle"); 654 return false; 655 } 656 } 657 658 if (new_caps[MIGRATION_CAPABILITY_MAPPED_RAM]) { 659 if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) { 660 error_setg(errp, 661 "Mapped-ram migration is incompatible with xbzrle"); 662 return false; 663 } 664 665 if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) { 666 error_setg(errp, 667 "Mapped-ram migration is incompatible with compression"); 668 return false; 669 } 670 671 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 672 error_setg(errp, 673 "Mapped-ram migration is incompatible with postcopy"); 674 return false; 675 } 676 } 677 678 return true; 679 } 680 681 bool migrate_cap_set(int cap, bool value, Error **errp) 682 { 683 MigrationState *s = migrate_get_current(); 684 bool new_caps[MIGRATION_CAPABILITY__MAX]; 685 686 if (migration_is_running()) { 687 error_setg(errp, "There's a migration process in progress"); 688 return false; 689 } 690 691 memcpy(new_caps, s->capabilities, sizeof(new_caps)); 692 new_caps[cap] = value; 693 694 if (!migrate_caps_check(s->capabilities, new_caps, errp)) { 695 return false; 696 } 697 s->capabilities[cap] = value; 698 return true; 699 } 700 701 MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) 702 { 703 MigrationCapabilityStatusList *head = NULL, **tail = &head; 704 MigrationCapabilityStatus *caps; 705 MigrationState *s = migrate_get_current(); 706 int i; 707 708 for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { 709 #ifndef CONFIG_LIVE_BLOCK_MIGRATION 710 if (i == MIGRATION_CAPABILITY_BLOCK) { 711 continue; 712 } 713 #endif 714 caps = g_malloc0(sizeof(*caps)); 715 caps->capability = i; 716 caps->state = s->capabilities[i]; 717 QAPI_LIST_APPEND(tail, caps); 718 } 719 720 return head; 721 } 722 723 void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, 724 Error **errp) 725 { 726 MigrationState *s = migrate_get_current(); 727 MigrationCapabilityStatusList *cap; 728 bool new_caps[MIGRATION_CAPABILITY__MAX]; 729 730 if (migration_is_running() || migration_in_colo_state()) { 731 error_setg(errp, "There's a migration process in progress"); 732 return; 733 } 734 735 memcpy(new_caps, s->capabilities, sizeof(new_caps)); 736 for (cap = params; cap; cap = cap->next) { 737 new_caps[cap->value->capability] = cap->value->state; 738 } 739 740 if (!migrate_caps_check(s->capabilities, new_caps, errp)) { 741 return; 742 } 743 744 for (cap = params; cap; cap = cap->next) { 745 s->capabilities[cap->value->capability] = cap->value->state; 746 } 747 } 748 749 /* parameters */ 750 751 const BitmapMigrationNodeAliasList *migrate_block_bitmap_mapping(void) 752 { 753 MigrationState *s = migrate_get_current(); 754 755 return s->parameters.block_bitmap_mapping; 756 } 757 758 bool migrate_has_block_bitmap_mapping(void) 759 { 760 MigrationState *s = migrate_get_current(); 761 762 return s->parameters.has_block_bitmap_mapping; 763 } 764 765 uint32_t migrate_checkpoint_delay(void) 766 { 767 MigrationState *s = migrate_get_current(); 768 769 return s->parameters.x_checkpoint_delay; 770 } 771 772 int migrate_compress_level(void) 773 { 774 MigrationState *s = migrate_get_current(); 775 776 return s->parameters.compress_level; 777 } 778 779 int migrate_compress_threads(void) 780 { 781 MigrationState *s = migrate_get_current(); 782 783 return s->parameters.compress_threads; 784 } 785 786 int migrate_compress_wait_thread(void) 787 { 788 MigrationState *s = migrate_get_current(); 789 790 return s->parameters.compress_wait_thread; 791 } 792 793 uint8_t migrate_cpu_throttle_increment(void) 794 { 795 MigrationState *s = migrate_get_current(); 796 797 return s->parameters.cpu_throttle_increment; 798 } 799 800 uint8_t migrate_cpu_throttle_initial(void) 801 { 802 MigrationState *s = migrate_get_current(); 803 804 return s->parameters.cpu_throttle_initial; 805 } 806 807 bool migrate_cpu_throttle_tailslow(void) 808 { 809 MigrationState *s = migrate_get_current(); 810 811 return s->parameters.cpu_throttle_tailslow; 812 } 813 814 int migrate_decompress_threads(void) 815 { 816 MigrationState *s = migrate_get_current(); 817 818 return s->parameters.decompress_threads; 819 } 820 821 uint64_t migrate_downtime_limit(void) 822 { 823 MigrationState *s = migrate_get_current(); 824 825 return s->parameters.downtime_limit; 826 } 827 828 uint8_t migrate_max_cpu_throttle(void) 829 { 830 MigrationState *s = migrate_get_current(); 831 832 return s->parameters.max_cpu_throttle; 833 } 834 835 uint64_t migrate_max_bandwidth(void) 836 { 837 MigrationState *s = migrate_get_current(); 838 839 return s->parameters.max_bandwidth; 840 } 841 842 uint64_t migrate_avail_switchover_bandwidth(void) 843 { 844 MigrationState *s = migrate_get_current(); 845 846 return s->parameters.avail_switchover_bandwidth; 847 } 848 849 uint64_t migrate_max_postcopy_bandwidth(void) 850 { 851 MigrationState *s = migrate_get_current(); 852 853 return s->parameters.max_postcopy_bandwidth; 854 } 855 856 MigMode migrate_mode(void) 857 { 858 MigrationState *s = migrate_get_current(); 859 MigMode mode = s->parameters.mode; 860 861 assert(mode >= 0 && mode < MIG_MODE__MAX); 862 return mode; 863 } 864 865 int migrate_multifd_channels(void) 866 { 867 MigrationState *s = migrate_get_current(); 868 869 return s->parameters.multifd_channels; 870 } 871 872 MultiFDCompression migrate_multifd_compression(void) 873 { 874 MigrationState *s = migrate_get_current(); 875 876 assert(s->parameters.multifd_compression < MULTIFD_COMPRESSION__MAX); 877 return s->parameters.multifd_compression; 878 } 879 880 int migrate_multifd_zlib_level(void) 881 { 882 MigrationState *s = migrate_get_current(); 883 884 return s->parameters.multifd_zlib_level; 885 } 886 887 int migrate_multifd_zstd_level(void) 888 { 889 MigrationState *s = migrate_get_current(); 890 891 return s->parameters.multifd_zstd_level; 892 } 893 894 uint8_t migrate_throttle_trigger_threshold(void) 895 { 896 MigrationState *s = migrate_get_current(); 897 898 return s->parameters.throttle_trigger_threshold; 899 } 900 901 const char *migrate_tls_authz(void) 902 { 903 MigrationState *s = migrate_get_current(); 904 905 return s->parameters.tls_authz; 906 } 907 908 const char *migrate_tls_creds(void) 909 { 910 MigrationState *s = migrate_get_current(); 911 912 return s->parameters.tls_creds; 913 } 914 915 const char *migrate_tls_hostname(void) 916 { 917 MigrationState *s = migrate_get_current(); 918 919 return s->parameters.tls_hostname; 920 } 921 922 uint64_t migrate_vcpu_dirty_limit_period(void) 923 { 924 MigrationState *s = migrate_get_current(); 925 926 return s->parameters.x_vcpu_dirty_limit_period; 927 } 928 929 uint64_t migrate_xbzrle_cache_size(void) 930 { 931 MigrationState *s = migrate_get_current(); 932 933 return s->parameters.xbzrle_cache_size; 934 } 935 936 ZeroPageDetection migrate_zero_page_detection(void) 937 { 938 MigrationState *s = migrate_get_current(); 939 940 return s->parameters.zero_page_detection; 941 } 942 943 /* parameters helpers */ 944 945 AnnounceParameters *migrate_announce_params(void) 946 { 947 static AnnounceParameters ap; 948 949 MigrationState *s = migrate_get_current(); 950 951 ap.initial = s->parameters.announce_initial; 952 ap.max = s->parameters.announce_max; 953 ap.rounds = s->parameters.announce_rounds; 954 ap.step = s->parameters.announce_step; 955 956 return ≈ 957 } 958 959 MigrationParameters *qmp_query_migrate_parameters(Error **errp) 960 { 961 MigrationParameters *params; 962 MigrationState *s = migrate_get_current(); 963 964 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 965 params = g_malloc0(sizeof(*params)); 966 params->has_compress_level = true; 967 params->compress_level = s->parameters.compress_level; 968 params->has_compress_threads = true; 969 params->compress_threads = s->parameters.compress_threads; 970 params->has_compress_wait_thread = true; 971 params->compress_wait_thread = s->parameters.compress_wait_thread; 972 params->has_decompress_threads = true; 973 params->decompress_threads = s->parameters.decompress_threads; 974 params->has_throttle_trigger_threshold = true; 975 params->throttle_trigger_threshold = s->parameters.throttle_trigger_threshold; 976 params->has_cpu_throttle_initial = true; 977 params->cpu_throttle_initial = s->parameters.cpu_throttle_initial; 978 params->has_cpu_throttle_increment = true; 979 params->cpu_throttle_increment = s->parameters.cpu_throttle_increment; 980 params->has_cpu_throttle_tailslow = true; 981 params->cpu_throttle_tailslow = s->parameters.cpu_throttle_tailslow; 982 params->tls_creds = g_strdup(s->parameters.tls_creds); 983 params->tls_hostname = g_strdup(s->parameters.tls_hostname); 984 params->tls_authz = g_strdup(s->parameters.tls_authz ? 985 s->parameters.tls_authz : ""); 986 params->has_max_bandwidth = true; 987 params->max_bandwidth = s->parameters.max_bandwidth; 988 params->has_avail_switchover_bandwidth = true; 989 params->avail_switchover_bandwidth = s->parameters.avail_switchover_bandwidth; 990 params->has_downtime_limit = true; 991 params->downtime_limit = s->parameters.downtime_limit; 992 params->has_x_checkpoint_delay = true; 993 params->x_checkpoint_delay = s->parameters.x_checkpoint_delay; 994 params->has_multifd_channels = true; 995 params->multifd_channels = s->parameters.multifd_channels; 996 params->has_multifd_compression = true; 997 params->multifd_compression = s->parameters.multifd_compression; 998 params->has_multifd_zlib_level = true; 999 params->multifd_zlib_level = s->parameters.multifd_zlib_level; 1000 params->has_multifd_zstd_level = true; 1001 params->multifd_zstd_level = s->parameters.multifd_zstd_level; 1002 params->has_xbzrle_cache_size = true; 1003 params->xbzrle_cache_size = s->parameters.xbzrle_cache_size; 1004 params->has_max_postcopy_bandwidth = true; 1005 params->max_postcopy_bandwidth = s->parameters.max_postcopy_bandwidth; 1006 params->has_max_cpu_throttle = true; 1007 params->max_cpu_throttle = s->parameters.max_cpu_throttle; 1008 params->has_announce_initial = true; 1009 params->announce_initial = s->parameters.announce_initial; 1010 params->has_announce_max = true; 1011 params->announce_max = s->parameters.announce_max; 1012 params->has_announce_rounds = true; 1013 params->announce_rounds = s->parameters.announce_rounds; 1014 params->has_announce_step = true; 1015 params->announce_step = s->parameters.announce_step; 1016 1017 if (s->parameters.has_block_bitmap_mapping) { 1018 params->has_block_bitmap_mapping = true; 1019 params->block_bitmap_mapping = 1020 QAPI_CLONE(BitmapMigrationNodeAliasList, 1021 s->parameters.block_bitmap_mapping); 1022 } 1023 1024 params->has_x_vcpu_dirty_limit_period = true; 1025 params->x_vcpu_dirty_limit_period = s->parameters.x_vcpu_dirty_limit_period; 1026 params->has_vcpu_dirty_limit = true; 1027 params->vcpu_dirty_limit = s->parameters.vcpu_dirty_limit; 1028 params->has_mode = true; 1029 params->mode = s->parameters.mode; 1030 params->has_zero_page_detection = true; 1031 params->zero_page_detection = s->parameters.zero_page_detection; 1032 1033 return params; 1034 } 1035 1036 void migrate_params_init(MigrationParameters *params) 1037 { 1038 params->tls_hostname = g_strdup(""); 1039 params->tls_creds = g_strdup(""); 1040 1041 /* Set has_* up only for parameter checks */ 1042 params->has_compress_level = true; 1043 params->has_compress_threads = true; 1044 params->has_compress_wait_thread = true; 1045 params->has_decompress_threads = true; 1046 params->has_throttle_trigger_threshold = true; 1047 params->has_cpu_throttle_initial = true; 1048 params->has_cpu_throttle_increment = true; 1049 params->has_cpu_throttle_tailslow = true; 1050 params->has_max_bandwidth = true; 1051 params->has_downtime_limit = true; 1052 params->has_x_checkpoint_delay = true; 1053 params->has_multifd_channels = true; 1054 params->has_multifd_compression = true; 1055 params->has_multifd_zlib_level = true; 1056 params->has_multifd_zstd_level = true; 1057 params->has_xbzrle_cache_size = true; 1058 params->has_max_postcopy_bandwidth = true; 1059 params->has_max_cpu_throttle = true; 1060 params->has_announce_initial = true; 1061 params->has_announce_max = true; 1062 params->has_announce_rounds = true; 1063 params->has_announce_step = true; 1064 params->has_x_vcpu_dirty_limit_period = true; 1065 params->has_vcpu_dirty_limit = true; 1066 params->has_mode = true; 1067 params->has_zero_page_detection = true; 1068 } 1069 1070 /* 1071 * Check whether the parameters are valid. Error will be put into errp 1072 * (if provided). Return true if valid, otherwise false. 1073 */ 1074 bool migrate_params_check(MigrationParameters *params, Error **errp) 1075 { 1076 ERRP_GUARD(); 1077 1078 if (params->has_compress_level && 1079 (params->compress_level > 9)) { 1080 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level", 1081 "a value between 0 and 9"); 1082 return false; 1083 } 1084 1085 if (params->has_compress_threads && (params->compress_threads < 1)) { 1086 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1087 "compress_threads", 1088 "a value between 1 and 255"); 1089 return false; 1090 } 1091 1092 if (params->has_decompress_threads && (params->decompress_threads < 1)) { 1093 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1094 "decompress_threads", 1095 "a value between 1 and 255"); 1096 return false; 1097 } 1098 1099 if (params->has_throttle_trigger_threshold && 1100 (params->throttle_trigger_threshold < 1 || 1101 params->throttle_trigger_threshold > 100)) { 1102 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1103 "throttle_trigger_threshold", 1104 "an integer in the range of 1 to 100"); 1105 return false; 1106 } 1107 1108 if (params->has_cpu_throttle_initial && 1109 (params->cpu_throttle_initial < 1 || 1110 params->cpu_throttle_initial > 99)) { 1111 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1112 "cpu_throttle_initial", 1113 "an integer in the range of 1 to 99"); 1114 return false; 1115 } 1116 1117 if (params->has_cpu_throttle_increment && 1118 (params->cpu_throttle_increment < 1 || 1119 params->cpu_throttle_increment > 99)) { 1120 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1121 "cpu_throttle_increment", 1122 "an integer in the range of 1 to 99"); 1123 return false; 1124 } 1125 1126 if (params->has_max_bandwidth && (params->max_bandwidth > SIZE_MAX)) { 1127 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1128 "max_bandwidth", 1129 "an integer in the range of 0 to "stringify(SIZE_MAX) 1130 " bytes/second"); 1131 return false; 1132 } 1133 1134 if (params->has_avail_switchover_bandwidth && 1135 (params->avail_switchover_bandwidth > SIZE_MAX)) { 1136 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1137 "avail_switchover_bandwidth", 1138 "an integer in the range of 0 to "stringify(SIZE_MAX) 1139 " bytes/second"); 1140 return false; 1141 } 1142 1143 if (params->has_downtime_limit && 1144 (params->downtime_limit > MAX_MIGRATE_DOWNTIME)) { 1145 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1146 "downtime_limit", 1147 "an integer in the range of 0 to " 1148 stringify(MAX_MIGRATE_DOWNTIME)" ms"); 1149 return false; 1150 } 1151 1152 /* x_checkpoint_delay is now always positive */ 1153 1154 if (params->has_multifd_channels && (params->multifd_channels < 1)) { 1155 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1156 "multifd_channels", 1157 "a value between 1 and 255"); 1158 return false; 1159 } 1160 1161 if (params->has_multifd_zlib_level && 1162 (params->multifd_zlib_level > 9)) { 1163 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zlib_level", 1164 "a value between 0 and 9"); 1165 return false; 1166 } 1167 1168 if (params->has_multifd_zstd_level && 1169 (params->multifd_zstd_level > 20)) { 1170 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zstd_level", 1171 "a value between 0 and 20"); 1172 return false; 1173 } 1174 1175 if (params->has_xbzrle_cache_size && 1176 (params->xbzrle_cache_size < qemu_target_page_size() || 1177 !is_power_of_2(params->xbzrle_cache_size))) { 1178 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1179 "xbzrle_cache_size", 1180 "a power of two no less than the target page size"); 1181 return false; 1182 } 1183 1184 if (params->has_max_cpu_throttle && 1185 (params->max_cpu_throttle < params->cpu_throttle_initial || 1186 params->max_cpu_throttle > 99)) { 1187 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1188 "max_cpu_throttle", 1189 "an integer in the range of cpu_throttle_initial to 99"); 1190 return false; 1191 } 1192 1193 if (params->has_announce_initial && 1194 params->announce_initial > 100000) { 1195 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1196 "announce_initial", 1197 "a value between 0 and 100000"); 1198 return false; 1199 } 1200 if (params->has_announce_max && 1201 params->announce_max > 100000) { 1202 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1203 "announce_max", 1204 "a value between 0 and 100000"); 1205 return false; 1206 } 1207 if (params->has_announce_rounds && 1208 params->announce_rounds > 1000) { 1209 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1210 "announce_rounds", 1211 "a value between 0 and 1000"); 1212 return false; 1213 } 1214 if (params->has_announce_step && 1215 (params->announce_step < 1 || 1216 params->announce_step > 10000)) { 1217 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1218 "announce_step", 1219 "a value between 0 and 10000"); 1220 return false; 1221 } 1222 1223 if (params->has_block_bitmap_mapping && 1224 !check_dirty_bitmap_mig_alias_map(params->block_bitmap_mapping, errp)) { 1225 error_prepend(errp, "Invalid mapping given for block-bitmap-mapping: "); 1226 return false; 1227 } 1228 1229 #ifdef CONFIG_LINUX 1230 if (migrate_zero_copy_send() && 1231 ((params->has_multifd_compression && params->multifd_compression) || 1232 (params->tls_creds && *params->tls_creds))) { 1233 error_setg(errp, 1234 "Zero copy only available for non-compressed non-TLS multifd migration"); 1235 return false; 1236 } 1237 #endif 1238 1239 if (migrate_mapped_ram() && 1240 (migrate_multifd_compression() || migrate_tls())) { 1241 error_setg(errp, 1242 "Mapped-ram only available for non-compressed non-TLS multifd migration"); 1243 return false; 1244 } 1245 1246 if (params->has_x_vcpu_dirty_limit_period && 1247 (params->x_vcpu_dirty_limit_period < 1 || 1248 params->x_vcpu_dirty_limit_period > 1000)) { 1249 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1250 "x-vcpu-dirty-limit-period", 1251 "a value between 1 and 1000"); 1252 return false; 1253 } 1254 1255 if (params->has_vcpu_dirty_limit && 1256 (params->vcpu_dirty_limit < 1)) { 1257 error_setg(errp, 1258 "Parameter 'vcpu_dirty_limit' must be greater than 1 MB/s"); 1259 return false; 1260 } 1261 1262 return true; 1263 } 1264 1265 static void migrate_params_test_apply(MigrateSetParameters *params, 1266 MigrationParameters *dest) 1267 { 1268 *dest = migrate_get_current()->parameters; 1269 1270 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 1271 1272 if (params->has_compress_level) { 1273 dest->compress_level = params->compress_level; 1274 } 1275 1276 if (params->has_compress_threads) { 1277 dest->compress_threads = params->compress_threads; 1278 } 1279 1280 if (params->has_compress_wait_thread) { 1281 dest->compress_wait_thread = params->compress_wait_thread; 1282 } 1283 1284 if (params->has_decompress_threads) { 1285 dest->decompress_threads = params->decompress_threads; 1286 } 1287 1288 if (params->has_throttle_trigger_threshold) { 1289 dest->throttle_trigger_threshold = params->throttle_trigger_threshold; 1290 } 1291 1292 if (params->has_cpu_throttle_initial) { 1293 dest->cpu_throttle_initial = params->cpu_throttle_initial; 1294 } 1295 1296 if (params->has_cpu_throttle_increment) { 1297 dest->cpu_throttle_increment = params->cpu_throttle_increment; 1298 } 1299 1300 if (params->has_cpu_throttle_tailslow) { 1301 dest->cpu_throttle_tailslow = params->cpu_throttle_tailslow; 1302 } 1303 1304 if (params->tls_creds) { 1305 assert(params->tls_creds->type == QTYPE_QSTRING); 1306 dest->tls_creds = params->tls_creds->u.s; 1307 } 1308 1309 if (params->tls_hostname) { 1310 assert(params->tls_hostname->type == QTYPE_QSTRING); 1311 dest->tls_hostname = params->tls_hostname->u.s; 1312 } 1313 1314 if (params->has_max_bandwidth) { 1315 dest->max_bandwidth = params->max_bandwidth; 1316 } 1317 1318 if (params->has_avail_switchover_bandwidth) { 1319 dest->avail_switchover_bandwidth = params->avail_switchover_bandwidth; 1320 } 1321 1322 if (params->has_downtime_limit) { 1323 dest->downtime_limit = params->downtime_limit; 1324 } 1325 1326 if (params->has_x_checkpoint_delay) { 1327 dest->x_checkpoint_delay = params->x_checkpoint_delay; 1328 } 1329 1330 if (params->has_multifd_channels) { 1331 dest->multifd_channels = params->multifd_channels; 1332 } 1333 if (params->has_multifd_compression) { 1334 dest->multifd_compression = params->multifd_compression; 1335 } 1336 if (params->has_multifd_zlib_level) { 1337 dest->multifd_zlib_level = params->multifd_zlib_level; 1338 } 1339 if (params->has_multifd_zstd_level) { 1340 dest->multifd_zstd_level = params->multifd_zstd_level; 1341 } 1342 if (params->has_xbzrle_cache_size) { 1343 dest->xbzrle_cache_size = params->xbzrle_cache_size; 1344 } 1345 if (params->has_max_postcopy_bandwidth) { 1346 dest->max_postcopy_bandwidth = params->max_postcopy_bandwidth; 1347 } 1348 if (params->has_max_cpu_throttle) { 1349 dest->max_cpu_throttle = params->max_cpu_throttle; 1350 } 1351 if (params->has_announce_initial) { 1352 dest->announce_initial = params->announce_initial; 1353 } 1354 if (params->has_announce_max) { 1355 dest->announce_max = params->announce_max; 1356 } 1357 if (params->has_announce_rounds) { 1358 dest->announce_rounds = params->announce_rounds; 1359 } 1360 if (params->has_announce_step) { 1361 dest->announce_step = params->announce_step; 1362 } 1363 1364 if (params->has_block_bitmap_mapping) { 1365 dest->has_block_bitmap_mapping = true; 1366 dest->block_bitmap_mapping = params->block_bitmap_mapping; 1367 } 1368 1369 if (params->has_x_vcpu_dirty_limit_period) { 1370 dest->x_vcpu_dirty_limit_period = 1371 params->x_vcpu_dirty_limit_period; 1372 } 1373 if (params->has_vcpu_dirty_limit) { 1374 dest->vcpu_dirty_limit = params->vcpu_dirty_limit; 1375 } 1376 1377 if (params->has_mode) { 1378 dest->mode = params->mode; 1379 } 1380 1381 if (params->has_zero_page_detection) { 1382 dest->zero_page_detection = params->zero_page_detection; 1383 } 1384 } 1385 1386 static void migrate_params_apply(MigrateSetParameters *params, Error **errp) 1387 { 1388 MigrationState *s = migrate_get_current(); 1389 1390 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 1391 1392 if (params->has_compress_level) { 1393 warn_report("old compression is deprecated;" 1394 " use multifd compression methods instead"); 1395 s->parameters.compress_level = params->compress_level; 1396 } 1397 1398 if (params->has_compress_threads) { 1399 warn_report("old compression is deprecated;" 1400 " use multifd compression methods instead"); 1401 s->parameters.compress_threads = params->compress_threads; 1402 } 1403 1404 if (params->has_compress_wait_thread) { 1405 warn_report("old compression is deprecated;" 1406 " use multifd compression methods instead"); 1407 s->parameters.compress_wait_thread = params->compress_wait_thread; 1408 } 1409 1410 if (params->has_decompress_threads) { 1411 warn_report("old compression is deprecated;" 1412 " use multifd compression methods instead"); 1413 s->parameters.decompress_threads = params->decompress_threads; 1414 } 1415 1416 if (params->has_throttle_trigger_threshold) { 1417 s->parameters.throttle_trigger_threshold = params->throttle_trigger_threshold; 1418 } 1419 1420 if (params->has_cpu_throttle_initial) { 1421 s->parameters.cpu_throttle_initial = params->cpu_throttle_initial; 1422 } 1423 1424 if (params->has_cpu_throttle_increment) { 1425 s->parameters.cpu_throttle_increment = params->cpu_throttle_increment; 1426 } 1427 1428 if (params->has_cpu_throttle_tailslow) { 1429 s->parameters.cpu_throttle_tailslow = params->cpu_throttle_tailslow; 1430 } 1431 1432 if (params->tls_creds) { 1433 g_free(s->parameters.tls_creds); 1434 assert(params->tls_creds->type == QTYPE_QSTRING); 1435 s->parameters.tls_creds = g_strdup(params->tls_creds->u.s); 1436 } 1437 1438 if (params->tls_hostname) { 1439 g_free(s->parameters.tls_hostname); 1440 assert(params->tls_hostname->type == QTYPE_QSTRING); 1441 s->parameters.tls_hostname = g_strdup(params->tls_hostname->u.s); 1442 } 1443 1444 if (params->tls_authz) { 1445 g_free(s->parameters.tls_authz); 1446 assert(params->tls_authz->type == QTYPE_QSTRING); 1447 s->parameters.tls_authz = g_strdup(params->tls_authz->u.s); 1448 } 1449 1450 if (params->has_max_bandwidth) { 1451 s->parameters.max_bandwidth = params->max_bandwidth; 1452 if (s->to_dst_file && !migration_in_postcopy()) { 1453 migration_rate_set(s->parameters.max_bandwidth); 1454 } 1455 } 1456 1457 if (params->has_avail_switchover_bandwidth) { 1458 s->parameters.avail_switchover_bandwidth = params->avail_switchover_bandwidth; 1459 } 1460 1461 if (params->has_downtime_limit) { 1462 s->parameters.downtime_limit = params->downtime_limit; 1463 } 1464 1465 if (params->has_x_checkpoint_delay) { 1466 s->parameters.x_checkpoint_delay = params->x_checkpoint_delay; 1467 colo_checkpoint_delay_set(); 1468 } 1469 1470 if (params->has_multifd_channels) { 1471 s->parameters.multifd_channels = params->multifd_channels; 1472 } 1473 if (params->has_multifd_compression) { 1474 s->parameters.multifd_compression = params->multifd_compression; 1475 } 1476 if (params->has_multifd_zlib_level) { 1477 s->parameters.multifd_zlib_level = params->multifd_zlib_level; 1478 } 1479 if (params->has_multifd_zstd_level) { 1480 s->parameters.multifd_zstd_level = params->multifd_zstd_level; 1481 } 1482 if (params->has_xbzrle_cache_size) { 1483 s->parameters.xbzrle_cache_size = params->xbzrle_cache_size; 1484 xbzrle_cache_resize(params->xbzrle_cache_size, errp); 1485 } 1486 if (params->has_max_postcopy_bandwidth) { 1487 s->parameters.max_postcopy_bandwidth = params->max_postcopy_bandwidth; 1488 if (s->to_dst_file && migration_in_postcopy()) { 1489 migration_rate_set(s->parameters.max_postcopy_bandwidth); 1490 } 1491 } 1492 if (params->has_max_cpu_throttle) { 1493 s->parameters.max_cpu_throttle = params->max_cpu_throttle; 1494 } 1495 if (params->has_announce_initial) { 1496 s->parameters.announce_initial = params->announce_initial; 1497 } 1498 if (params->has_announce_max) { 1499 s->parameters.announce_max = params->announce_max; 1500 } 1501 if (params->has_announce_rounds) { 1502 s->parameters.announce_rounds = params->announce_rounds; 1503 } 1504 if (params->has_announce_step) { 1505 s->parameters.announce_step = params->announce_step; 1506 } 1507 1508 if (params->has_block_bitmap_mapping) { 1509 qapi_free_BitmapMigrationNodeAliasList( 1510 s->parameters.block_bitmap_mapping); 1511 1512 s->parameters.has_block_bitmap_mapping = true; 1513 s->parameters.block_bitmap_mapping = 1514 QAPI_CLONE(BitmapMigrationNodeAliasList, 1515 params->block_bitmap_mapping); 1516 } 1517 1518 if (params->has_x_vcpu_dirty_limit_period) { 1519 s->parameters.x_vcpu_dirty_limit_period = 1520 params->x_vcpu_dirty_limit_period; 1521 } 1522 if (params->has_vcpu_dirty_limit) { 1523 s->parameters.vcpu_dirty_limit = params->vcpu_dirty_limit; 1524 } 1525 1526 if (params->has_mode) { 1527 s->parameters.mode = params->mode; 1528 } 1529 1530 if (params->has_zero_page_detection) { 1531 s->parameters.zero_page_detection = params->zero_page_detection; 1532 } 1533 } 1534 1535 void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp) 1536 { 1537 MigrationParameters tmp; 1538 1539 /* TODO Rewrite "" to null instead for all three tls_* parameters */ 1540 if (params->tls_creds 1541 && params->tls_creds->type == QTYPE_QNULL) { 1542 qobject_unref(params->tls_creds->u.n); 1543 params->tls_creds->type = QTYPE_QSTRING; 1544 params->tls_creds->u.s = strdup(""); 1545 } 1546 if (params->tls_hostname 1547 && params->tls_hostname->type == QTYPE_QNULL) { 1548 qobject_unref(params->tls_hostname->u.n); 1549 params->tls_hostname->type = QTYPE_QSTRING; 1550 params->tls_hostname->u.s = strdup(""); 1551 } 1552 if (params->tls_authz 1553 && params->tls_authz->type == QTYPE_QNULL) { 1554 qobject_unref(params->tls_authz->u.n); 1555 params->tls_authz->type = QTYPE_QSTRING; 1556 params->tls_authz->u.s = strdup(""); 1557 } 1558 1559 migrate_params_test_apply(params, &tmp); 1560 1561 if (!migrate_params_check(&tmp, errp)) { 1562 /* Invalid parameter */ 1563 return; 1564 } 1565 1566 migrate_params_apply(params, errp); 1567 } 1568