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 (blk/-b) " 490 "block migration"); 491 error_append_hint(errp, "Use blockdev-mirror with NBD instead.\n"); 492 return false; 493 } 494 #endif 495 if (new_caps[MIGRATION_CAPABILITY_BLOCK]) { 496 warn_report("block migration is deprecated;" 497 " use blockdev-mirror with NBD instead"); 498 } 499 500 if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) { 501 warn_report("old compression method is deprecated;" 502 " use multifd compression methods instead"); 503 } 504 505 #ifndef CONFIG_REPLICATION 506 if (new_caps[MIGRATION_CAPABILITY_X_COLO]) { 507 error_setg(errp, "QEMU compiled without replication module" 508 " can't enable COLO"); 509 error_append_hint(errp, "Please enable replication before COLO.\n"); 510 return false; 511 } 512 #endif 513 514 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 515 /* This check is reasonably expensive, so only when it's being 516 * set the first time, also it's only the destination that needs 517 * special support. 518 */ 519 if (!old_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM] && 520 runstate_check(RUN_STATE_INMIGRATE) && 521 !postcopy_ram_supported_by_host(mis, errp)) { 522 error_prepend(errp, "Postcopy is not supported: "); 523 return false; 524 } 525 526 if (new_caps[MIGRATION_CAPABILITY_X_IGNORE_SHARED]) { 527 error_setg(errp, "Postcopy is not compatible with ignore-shared"); 528 return false; 529 } 530 531 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 532 error_setg(errp, "Postcopy is not yet compatible with multifd"); 533 return false; 534 } 535 } 536 537 if (new_caps[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]) { 538 WriteTrackingSupport wt_support; 539 int idx; 540 /* 541 * Check if 'background-snapshot' capability is supported by 542 * host kernel and compatible with guest memory configuration. 543 */ 544 wt_support = migrate_query_write_tracking(); 545 if (wt_support < WT_SUPPORT_AVAILABLE) { 546 error_setg(errp, "Background-snapshot is not supported by host kernel"); 547 return false; 548 } 549 if (wt_support < WT_SUPPORT_COMPATIBLE) { 550 error_setg(errp, "Background-snapshot is not compatible " 551 "with guest memory configuration"); 552 return false; 553 } 554 555 /* 556 * Check if there are any migration capabilities 557 * incompatible with 'background-snapshot'. 558 */ 559 for (idx = 0; idx < check_caps_background_snapshot.size; idx++) { 560 int incomp_cap = check_caps_background_snapshot.caps[idx]; 561 if (new_caps[incomp_cap]) { 562 error_setg(errp, 563 "Background-snapshot is not compatible with %s", 564 MigrationCapability_str(incomp_cap)); 565 return false; 566 } 567 } 568 } 569 570 #ifdef CONFIG_LINUX 571 if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND] && 572 (!new_caps[MIGRATION_CAPABILITY_MULTIFD] || 573 new_caps[MIGRATION_CAPABILITY_COMPRESS] || 574 new_caps[MIGRATION_CAPABILITY_XBZRLE] || 575 migrate_multifd_compression() || 576 migrate_tls())) { 577 error_setg(errp, 578 "Zero copy only available for non-compressed non-TLS multifd migration"); 579 return false; 580 } 581 #else 582 if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND]) { 583 error_setg(errp, 584 "Zero copy currently only available on Linux"); 585 return false; 586 } 587 #endif 588 589 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT]) { 590 if (!new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 591 error_setg(errp, "Postcopy preempt requires postcopy-ram"); 592 return false; 593 } 594 595 /* 596 * Preempt mode requires urgent pages to be sent in separate 597 * channel, OTOH compression logic will disorder all pages into 598 * different compression channels, which is not compatible with the 599 * preempt assumptions on channel assignments. 600 */ 601 if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) { 602 error_setg(errp, "Postcopy preempt not compatible with compress"); 603 return false; 604 } 605 606 if (migrate_incoming_started()) { 607 error_setg(errp, 608 "Postcopy preempt must be set before incoming starts"); 609 return false; 610 } 611 } 612 613 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 614 if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) { 615 error_setg(errp, "Multifd is not compatible with compress"); 616 return false; 617 } 618 if (migrate_incoming_started()) { 619 error_setg(errp, "Multifd must be set before incoming starts"); 620 return false; 621 } 622 } 623 624 if (new_caps[MIGRATION_CAPABILITY_SWITCHOVER_ACK]) { 625 if (!new_caps[MIGRATION_CAPABILITY_RETURN_PATH]) { 626 error_setg(errp, "Capability 'switchover-ack' requires capability " 627 "'return-path'"); 628 return false; 629 } 630 } 631 if (new_caps[MIGRATION_CAPABILITY_DIRTY_LIMIT]) { 632 if (new_caps[MIGRATION_CAPABILITY_AUTO_CONVERGE]) { 633 error_setg(errp, "dirty-limit conflicts with auto-converge" 634 " either of then available currently"); 635 return false; 636 } 637 638 if (!kvm_enabled() || !kvm_dirty_ring_enabled()) { 639 error_setg(errp, "dirty-limit requires KVM with accelerator" 640 " property 'dirty-ring-size' set"); 641 return false; 642 } 643 } 644 645 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 646 if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) { 647 error_setg(errp, "Multifd is not compatible with xbzrle"); 648 return false; 649 } 650 } 651 652 if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) { 653 if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) { 654 error_setg(errp, "Compression is not compatible with xbzrle"); 655 return false; 656 } 657 } 658 659 if (new_caps[MIGRATION_CAPABILITY_MAPPED_RAM]) { 660 if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) { 661 error_setg(errp, 662 "Mapped-ram migration is incompatible with xbzrle"); 663 return false; 664 } 665 666 if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) { 667 error_setg(errp, 668 "Mapped-ram migration is incompatible with compression"); 669 return false; 670 } 671 672 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 673 error_setg(errp, 674 "Mapped-ram migration is incompatible with postcopy"); 675 return false; 676 } 677 } 678 679 return true; 680 } 681 682 bool migrate_cap_set(int cap, bool value, Error **errp) 683 { 684 MigrationState *s = migrate_get_current(); 685 bool new_caps[MIGRATION_CAPABILITY__MAX]; 686 687 if (migration_is_running()) { 688 error_setg(errp, "There's a migration process in progress"); 689 return false; 690 } 691 692 memcpy(new_caps, s->capabilities, sizeof(new_caps)); 693 new_caps[cap] = value; 694 695 if (!migrate_caps_check(s->capabilities, new_caps, errp)) { 696 return false; 697 } 698 s->capabilities[cap] = value; 699 return true; 700 } 701 702 MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) 703 { 704 MigrationCapabilityStatusList *head = NULL, **tail = &head; 705 MigrationCapabilityStatus *caps; 706 MigrationState *s = migrate_get_current(); 707 int i; 708 709 for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { 710 #ifndef CONFIG_LIVE_BLOCK_MIGRATION 711 if (i == MIGRATION_CAPABILITY_BLOCK) { 712 continue; 713 } 714 #endif 715 caps = g_malloc0(sizeof(*caps)); 716 caps->capability = i; 717 caps->state = s->capabilities[i]; 718 QAPI_LIST_APPEND(tail, caps); 719 } 720 721 return head; 722 } 723 724 void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, 725 Error **errp) 726 { 727 MigrationState *s = migrate_get_current(); 728 MigrationCapabilityStatusList *cap; 729 bool new_caps[MIGRATION_CAPABILITY__MAX]; 730 731 if (migration_is_running() || migration_in_colo_state()) { 732 error_setg(errp, "There's a migration process in progress"); 733 return; 734 } 735 736 memcpy(new_caps, s->capabilities, sizeof(new_caps)); 737 for (cap = params; cap; cap = cap->next) { 738 new_caps[cap->value->capability] = cap->value->state; 739 } 740 741 if (!migrate_caps_check(s->capabilities, new_caps, errp)) { 742 return; 743 } 744 745 for (cap = params; cap; cap = cap->next) { 746 s->capabilities[cap->value->capability] = cap->value->state; 747 } 748 } 749 750 /* parameters */ 751 752 const BitmapMigrationNodeAliasList *migrate_block_bitmap_mapping(void) 753 { 754 MigrationState *s = migrate_get_current(); 755 756 return s->parameters.block_bitmap_mapping; 757 } 758 759 bool migrate_has_block_bitmap_mapping(void) 760 { 761 MigrationState *s = migrate_get_current(); 762 763 return s->parameters.has_block_bitmap_mapping; 764 } 765 766 uint32_t migrate_checkpoint_delay(void) 767 { 768 MigrationState *s = migrate_get_current(); 769 770 return s->parameters.x_checkpoint_delay; 771 } 772 773 int migrate_compress_level(void) 774 { 775 MigrationState *s = migrate_get_current(); 776 777 return s->parameters.compress_level; 778 } 779 780 int migrate_compress_threads(void) 781 { 782 MigrationState *s = migrate_get_current(); 783 784 return s->parameters.compress_threads; 785 } 786 787 int migrate_compress_wait_thread(void) 788 { 789 MigrationState *s = migrate_get_current(); 790 791 return s->parameters.compress_wait_thread; 792 } 793 794 uint8_t migrate_cpu_throttle_increment(void) 795 { 796 MigrationState *s = migrate_get_current(); 797 798 return s->parameters.cpu_throttle_increment; 799 } 800 801 uint8_t migrate_cpu_throttle_initial(void) 802 { 803 MigrationState *s = migrate_get_current(); 804 805 return s->parameters.cpu_throttle_initial; 806 } 807 808 bool migrate_cpu_throttle_tailslow(void) 809 { 810 MigrationState *s = migrate_get_current(); 811 812 return s->parameters.cpu_throttle_tailslow; 813 } 814 815 int migrate_decompress_threads(void) 816 { 817 MigrationState *s = migrate_get_current(); 818 819 return s->parameters.decompress_threads; 820 } 821 822 uint64_t migrate_downtime_limit(void) 823 { 824 MigrationState *s = migrate_get_current(); 825 826 return s->parameters.downtime_limit; 827 } 828 829 uint8_t migrate_max_cpu_throttle(void) 830 { 831 MigrationState *s = migrate_get_current(); 832 833 return s->parameters.max_cpu_throttle; 834 } 835 836 uint64_t migrate_max_bandwidth(void) 837 { 838 MigrationState *s = migrate_get_current(); 839 840 return s->parameters.max_bandwidth; 841 } 842 843 uint64_t migrate_avail_switchover_bandwidth(void) 844 { 845 MigrationState *s = migrate_get_current(); 846 847 return s->parameters.avail_switchover_bandwidth; 848 } 849 850 uint64_t migrate_max_postcopy_bandwidth(void) 851 { 852 MigrationState *s = migrate_get_current(); 853 854 return s->parameters.max_postcopy_bandwidth; 855 } 856 857 MigMode migrate_mode(void) 858 { 859 MigrationState *s = migrate_get_current(); 860 MigMode mode = s->parameters.mode; 861 862 assert(mode >= 0 && mode < MIG_MODE__MAX); 863 return mode; 864 } 865 866 int migrate_multifd_channels(void) 867 { 868 MigrationState *s = migrate_get_current(); 869 870 return s->parameters.multifd_channels; 871 } 872 873 MultiFDCompression migrate_multifd_compression(void) 874 { 875 MigrationState *s = migrate_get_current(); 876 877 assert(s->parameters.multifd_compression < MULTIFD_COMPRESSION__MAX); 878 return s->parameters.multifd_compression; 879 } 880 881 int migrate_multifd_zlib_level(void) 882 { 883 MigrationState *s = migrate_get_current(); 884 885 return s->parameters.multifd_zlib_level; 886 } 887 888 int migrate_multifd_zstd_level(void) 889 { 890 MigrationState *s = migrate_get_current(); 891 892 return s->parameters.multifd_zstd_level; 893 } 894 895 uint8_t migrate_throttle_trigger_threshold(void) 896 { 897 MigrationState *s = migrate_get_current(); 898 899 return s->parameters.throttle_trigger_threshold; 900 } 901 902 const char *migrate_tls_authz(void) 903 { 904 MigrationState *s = migrate_get_current(); 905 906 return s->parameters.tls_authz; 907 } 908 909 const char *migrate_tls_creds(void) 910 { 911 MigrationState *s = migrate_get_current(); 912 913 return s->parameters.tls_creds; 914 } 915 916 const char *migrate_tls_hostname(void) 917 { 918 MigrationState *s = migrate_get_current(); 919 920 return s->parameters.tls_hostname; 921 } 922 923 uint64_t migrate_vcpu_dirty_limit_period(void) 924 { 925 MigrationState *s = migrate_get_current(); 926 927 return s->parameters.x_vcpu_dirty_limit_period; 928 } 929 930 uint64_t migrate_xbzrle_cache_size(void) 931 { 932 MigrationState *s = migrate_get_current(); 933 934 return s->parameters.xbzrle_cache_size; 935 } 936 937 ZeroPageDetection migrate_zero_page_detection(void) 938 { 939 MigrationState *s = migrate_get_current(); 940 941 return s->parameters.zero_page_detection; 942 } 943 944 /* parameters helpers */ 945 946 void block_cleanup_parameters(void) 947 { 948 MigrationState *s = migrate_get_current(); 949 950 if (s->must_remove_block_options) { 951 /* setting to false can never fail */ 952 migrate_cap_set(MIGRATION_CAPABILITY_BLOCK, false, &error_abort); 953 s->must_remove_block_options = false; 954 } 955 } 956 957 AnnounceParameters *migrate_announce_params(void) 958 { 959 static AnnounceParameters ap; 960 961 MigrationState *s = migrate_get_current(); 962 963 ap.initial = s->parameters.announce_initial; 964 ap.max = s->parameters.announce_max; 965 ap.rounds = s->parameters.announce_rounds; 966 ap.step = s->parameters.announce_step; 967 968 return ≈ 969 } 970 971 MigrationParameters *qmp_query_migrate_parameters(Error **errp) 972 { 973 MigrationParameters *params; 974 MigrationState *s = migrate_get_current(); 975 976 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 977 params = g_malloc0(sizeof(*params)); 978 params->has_compress_level = true; 979 params->compress_level = s->parameters.compress_level; 980 params->has_compress_threads = true; 981 params->compress_threads = s->parameters.compress_threads; 982 params->has_compress_wait_thread = true; 983 params->compress_wait_thread = s->parameters.compress_wait_thread; 984 params->has_decompress_threads = true; 985 params->decompress_threads = s->parameters.decompress_threads; 986 params->has_throttle_trigger_threshold = true; 987 params->throttle_trigger_threshold = s->parameters.throttle_trigger_threshold; 988 params->has_cpu_throttle_initial = true; 989 params->cpu_throttle_initial = s->parameters.cpu_throttle_initial; 990 params->has_cpu_throttle_increment = true; 991 params->cpu_throttle_increment = s->parameters.cpu_throttle_increment; 992 params->has_cpu_throttle_tailslow = true; 993 params->cpu_throttle_tailslow = s->parameters.cpu_throttle_tailslow; 994 params->tls_creds = g_strdup(s->parameters.tls_creds); 995 params->tls_hostname = g_strdup(s->parameters.tls_hostname); 996 params->tls_authz = g_strdup(s->parameters.tls_authz ? 997 s->parameters.tls_authz : ""); 998 params->has_max_bandwidth = true; 999 params->max_bandwidth = s->parameters.max_bandwidth; 1000 params->has_avail_switchover_bandwidth = true; 1001 params->avail_switchover_bandwidth = s->parameters.avail_switchover_bandwidth; 1002 params->has_downtime_limit = true; 1003 params->downtime_limit = s->parameters.downtime_limit; 1004 params->has_x_checkpoint_delay = true; 1005 params->x_checkpoint_delay = s->parameters.x_checkpoint_delay; 1006 params->has_multifd_channels = true; 1007 params->multifd_channels = s->parameters.multifd_channels; 1008 params->has_multifd_compression = true; 1009 params->multifd_compression = s->parameters.multifd_compression; 1010 params->has_multifd_zlib_level = true; 1011 params->multifd_zlib_level = s->parameters.multifd_zlib_level; 1012 params->has_multifd_zstd_level = true; 1013 params->multifd_zstd_level = s->parameters.multifd_zstd_level; 1014 params->has_xbzrle_cache_size = true; 1015 params->xbzrle_cache_size = s->parameters.xbzrle_cache_size; 1016 params->has_max_postcopy_bandwidth = true; 1017 params->max_postcopy_bandwidth = s->parameters.max_postcopy_bandwidth; 1018 params->has_max_cpu_throttle = true; 1019 params->max_cpu_throttle = s->parameters.max_cpu_throttle; 1020 params->has_announce_initial = true; 1021 params->announce_initial = s->parameters.announce_initial; 1022 params->has_announce_max = true; 1023 params->announce_max = s->parameters.announce_max; 1024 params->has_announce_rounds = true; 1025 params->announce_rounds = s->parameters.announce_rounds; 1026 params->has_announce_step = true; 1027 params->announce_step = s->parameters.announce_step; 1028 1029 if (s->parameters.has_block_bitmap_mapping) { 1030 params->has_block_bitmap_mapping = true; 1031 params->block_bitmap_mapping = 1032 QAPI_CLONE(BitmapMigrationNodeAliasList, 1033 s->parameters.block_bitmap_mapping); 1034 } 1035 1036 params->has_x_vcpu_dirty_limit_period = true; 1037 params->x_vcpu_dirty_limit_period = s->parameters.x_vcpu_dirty_limit_period; 1038 params->has_vcpu_dirty_limit = true; 1039 params->vcpu_dirty_limit = s->parameters.vcpu_dirty_limit; 1040 params->has_mode = true; 1041 params->mode = s->parameters.mode; 1042 params->has_zero_page_detection = true; 1043 params->zero_page_detection = s->parameters.zero_page_detection; 1044 1045 return params; 1046 } 1047 1048 void migrate_params_init(MigrationParameters *params) 1049 { 1050 params->tls_hostname = g_strdup(""); 1051 params->tls_creds = g_strdup(""); 1052 1053 /* Set has_* up only for parameter checks */ 1054 params->has_compress_level = true; 1055 params->has_compress_threads = true; 1056 params->has_compress_wait_thread = true; 1057 params->has_decompress_threads = true; 1058 params->has_throttle_trigger_threshold = true; 1059 params->has_cpu_throttle_initial = true; 1060 params->has_cpu_throttle_increment = true; 1061 params->has_cpu_throttle_tailslow = true; 1062 params->has_max_bandwidth = true; 1063 params->has_downtime_limit = true; 1064 params->has_x_checkpoint_delay = true; 1065 params->has_multifd_channels = true; 1066 params->has_multifd_compression = true; 1067 params->has_multifd_zlib_level = true; 1068 params->has_multifd_zstd_level = true; 1069 params->has_xbzrle_cache_size = true; 1070 params->has_max_postcopy_bandwidth = true; 1071 params->has_max_cpu_throttle = true; 1072 params->has_announce_initial = true; 1073 params->has_announce_max = true; 1074 params->has_announce_rounds = true; 1075 params->has_announce_step = true; 1076 params->has_x_vcpu_dirty_limit_period = true; 1077 params->has_vcpu_dirty_limit = true; 1078 params->has_mode = true; 1079 params->has_zero_page_detection = true; 1080 } 1081 1082 /* 1083 * Check whether the parameters are valid. Error will be put into errp 1084 * (if provided). Return true if valid, otherwise false. 1085 */ 1086 bool migrate_params_check(MigrationParameters *params, Error **errp) 1087 { 1088 ERRP_GUARD(); 1089 1090 if (params->has_compress_level && 1091 (params->compress_level > 9)) { 1092 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level", 1093 "a value between 0 and 9"); 1094 return false; 1095 } 1096 1097 if (params->has_compress_threads && (params->compress_threads < 1)) { 1098 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1099 "compress_threads", 1100 "a value between 1 and 255"); 1101 return false; 1102 } 1103 1104 if (params->has_decompress_threads && (params->decompress_threads < 1)) { 1105 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1106 "decompress_threads", 1107 "a value between 1 and 255"); 1108 return false; 1109 } 1110 1111 if (params->has_throttle_trigger_threshold && 1112 (params->throttle_trigger_threshold < 1 || 1113 params->throttle_trigger_threshold > 100)) { 1114 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1115 "throttle_trigger_threshold", 1116 "an integer in the range of 1 to 100"); 1117 return false; 1118 } 1119 1120 if (params->has_cpu_throttle_initial && 1121 (params->cpu_throttle_initial < 1 || 1122 params->cpu_throttle_initial > 99)) { 1123 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1124 "cpu_throttle_initial", 1125 "an integer in the range of 1 to 99"); 1126 return false; 1127 } 1128 1129 if (params->has_cpu_throttle_increment && 1130 (params->cpu_throttle_increment < 1 || 1131 params->cpu_throttle_increment > 99)) { 1132 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1133 "cpu_throttle_increment", 1134 "an integer in the range of 1 to 99"); 1135 return false; 1136 } 1137 1138 if (params->has_max_bandwidth && (params->max_bandwidth > SIZE_MAX)) { 1139 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1140 "max_bandwidth", 1141 "an integer in the range of 0 to "stringify(SIZE_MAX) 1142 " bytes/second"); 1143 return false; 1144 } 1145 1146 if (params->has_avail_switchover_bandwidth && 1147 (params->avail_switchover_bandwidth > SIZE_MAX)) { 1148 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1149 "avail_switchover_bandwidth", 1150 "an integer in the range of 0 to "stringify(SIZE_MAX) 1151 " bytes/second"); 1152 return false; 1153 } 1154 1155 if (params->has_downtime_limit && 1156 (params->downtime_limit > MAX_MIGRATE_DOWNTIME)) { 1157 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1158 "downtime_limit", 1159 "an integer in the range of 0 to " 1160 stringify(MAX_MIGRATE_DOWNTIME)" ms"); 1161 return false; 1162 } 1163 1164 /* x_checkpoint_delay is now always positive */ 1165 1166 if (params->has_multifd_channels && (params->multifd_channels < 1)) { 1167 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1168 "multifd_channels", 1169 "a value between 1 and 255"); 1170 return false; 1171 } 1172 1173 if (params->has_multifd_zlib_level && 1174 (params->multifd_zlib_level > 9)) { 1175 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zlib_level", 1176 "a value between 0 and 9"); 1177 return false; 1178 } 1179 1180 if (params->has_multifd_zstd_level && 1181 (params->multifd_zstd_level > 20)) { 1182 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zstd_level", 1183 "a value between 0 and 20"); 1184 return false; 1185 } 1186 1187 if (params->has_xbzrle_cache_size && 1188 (params->xbzrle_cache_size < qemu_target_page_size() || 1189 !is_power_of_2(params->xbzrle_cache_size))) { 1190 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1191 "xbzrle_cache_size", 1192 "a power of two no less than the target page size"); 1193 return false; 1194 } 1195 1196 if (params->has_max_cpu_throttle && 1197 (params->max_cpu_throttle < params->cpu_throttle_initial || 1198 params->max_cpu_throttle > 99)) { 1199 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1200 "max_cpu_throttle", 1201 "an integer in the range of cpu_throttle_initial to 99"); 1202 return false; 1203 } 1204 1205 if (params->has_announce_initial && 1206 params->announce_initial > 100000) { 1207 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1208 "announce_initial", 1209 "a value between 0 and 100000"); 1210 return false; 1211 } 1212 if (params->has_announce_max && 1213 params->announce_max > 100000) { 1214 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1215 "announce_max", 1216 "a value between 0 and 100000"); 1217 return false; 1218 } 1219 if (params->has_announce_rounds && 1220 params->announce_rounds > 1000) { 1221 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1222 "announce_rounds", 1223 "a value between 0 and 1000"); 1224 return false; 1225 } 1226 if (params->has_announce_step && 1227 (params->announce_step < 1 || 1228 params->announce_step > 10000)) { 1229 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1230 "announce_step", 1231 "a value between 0 and 10000"); 1232 return false; 1233 } 1234 1235 if (params->has_block_bitmap_mapping && 1236 !check_dirty_bitmap_mig_alias_map(params->block_bitmap_mapping, errp)) { 1237 error_prepend(errp, "Invalid mapping given for block-bitmap-mapping: "); 1238 return false; 1239 } 1240 1241 #ifdef CONFIG_LINUX 1242 if (migrate_zero_copy_send() && 1243 ((params->has_multifd_compression && params->multifd_compression) || 1244 (params->tls_creds && *params->tls_creds))) { 1245 error_setg(errp, 1246 "Zero copy only available for non-compressed non-TLS multifd migration"); 1247 return false; 1248 } 1249 #endif 1250 1251 if (migrate_mapped_ram() && 1252 (migrate_multifd_compression() || migrate_tls())) { 1253 error_setg(errp, 1254 "Mapped-ram only available for non-compressed non-TLS multifd migration"); 1255 return false; 1256 } 1257 1258 if (params->has_x_vcpu_dirty_limit_period && 1259 (params->x_vcpu_dirty_limit_period < 1 || 1260 params->x_vcpu_dirty_limit_period > 1000)) { 1261 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1262 "x-vcpu-dirty-limit-period", 1263 "a value between 1 and 1000"); 1264 return false; 1265 } 1266 1267 if (params->has_vcpu_dirty_limit && 1268 (params->vcpu_dirty_limit < 1)) { 1269 error_setg(errp, 1270 "Parameter 'vcpu_dirty_limit' must be greater than 1 MB/s"); 1271 return false; 1272 } 1273 1274 return true; 1275 } 1276 1277 static void migrate_params_test_apply(MigrateSetParameters *params, 1278 MigrationParameters *dest) 1279 { 1280 *dest = migrate_get_current()->parameters; 1281 1282 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 1283 1284 if (params->has_compress_level) { 1285 dest->compress_level = params->compress_level; 1286 } 1287 1288 if (params->has_compress_threads) { 1289 dest->compress_threads = params->compress_threads; 1290 } 1291 1292 if (params->has_compress_wait_thread) { 1293 dest->compress_wait_thread = params->compress_wait_thread; 1294 } 1295 1296 if (params->has_decompress_threads) { 1297 dest->decompress_threads = params->decompress_threads; 1298 } 1299 1300 if (params->has_throttle_trigger_threshold) { 1301 dest->throttle_trigger_threshold = params->throttle_trigger_threshold; 1302 } 1303 1304 if (params->has_cpu_throttle_initial) { 1305 dest->cpu_throttle_initial = params->cpu_throttle_initial; 1306 } 1307 1308 if (params->has_cpu_throttle_increment) { 1309 dest->cpu_throttle_increment = params->cpu_throttle_increment; 1310 } 1311 1312 if (params->has_cpu_throttle_tailslow) { 1313 dest->cpu_throttle_tailslow = params->cpu_throttle_tailslow; 1314 } 1315 1316 if (params->tls_creds) { 1317 assert(params->tls_creds->type == QTYPE_QSTRING); 1318 dest->tls_creds = params->tls_creds->u.s; 1319 } 1320 1321 if (params->tls_hostname) { 1322 assert(params->tls_hostname->type == QTYPE_QSTRING); 1323 dest->tls_hostname = params->tls_hostname->u.s; 1324 } 1325 1326 if (params->has_max_bandwidth) { 1327 dest->max_bandwidth = params->max_bandwidth; 1328 } 1329 1330 if (params->has_avail_switchover_bandwidth) { 1331 dest->avail_switchover_bandwidth = params->avail_switchover_bandwidth; 1332 } 1333 1334 if (params->has_downtime_limit) { 1335 dest->downtime_limit = params->downtime_limit; 1336 } 1337 1338 if (params->has_x_checkpoint_delay) { 1339 dest->x_checkpoint_delay = params->x_checkpoint_delay; 1340 } 1341 1342 if (params->has_multifd_channels) { 1343 dest->multifd_channels = params->multifd_channels; 1344 } 1345 if (params->has_multifd_compression) { 1346 dest->multifd_compression = params->multifd_compression; 1347 } 1348 if (params->has_multifd_zlib_level) { 1349 dest->multifd_zlib_level = params->multifd_zlib_level; 1350 } 1351 if (params->has_multifd_zstd_level) { 1352 dest->multifd_zstd_level = params->multifd_zstd_level; 1353 } 1354 if (params->has_xbzrle_cache_size) { 1355 dest->xbzrle_cache_size = params->xbzrle_cache_size; 1356 } 1357 if (params->has_max_postcopy_bandwidth) { 1358 dest->max_postcopy_bandwidth = params->max_postcopy_bandwidth; 1359 } 1360 if (params->has_max_cpu_throttle) { 1361 dest->max_cpu_throttle = params->max_cpu_throttle; 1362 } 1363 if (params->has_announce_initial) { 1364 dest->announce_initial = params->announce_initial; 1365 } 1366 if (params->has_announce_max) { 1367 dest->announce_max = params->announce_max; 1368 } 1369 if (params->has_announce_rounds) { 1370 dest->announce_rounds = params->announce_rounds; 1371 } 1372 if (params->has_announce_step) { 1373 dest->announce_step = params->announce_step; 1374 } 1375 1376 if (params->has_block_bitmap_mapping) { 1377 dest->has_block_bitmap_mapping = true; 1378 dest->block_bitmap_mapping = params->block_bitmap_mapping; 1379 } 1380 1381 if (params->has_x_vcpu_dirty_limit_period) { 1382 dest->x_vcpu_dirty_limit_period = 1383 params->x_vcpu_dirty_limit_period; 1384 } 1385 if (params->has_vcpu_dirty_limit) { 1386 dest->vcpu_dirty_limit = params->vcpu_dirty_limit; 1387 } 1388 1389 if (params->has_mode) { 1390 dest->mode = params->mode; 1391 } 1392 1393 if (params->has_zero_page_detection) { 1394 dest->zero_page_detection = params->zero_page_detection; 1395 } 1396 } 1397 1398 static void migrate_params_apply(MigrateSetParameters *params, Error **errp) 1399 { 1400 MigrationState *s = migrate_get_current(); 1401 1402 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 1403 1404 if (params->has_compress_level) { 1405 warn_report("old compression is deprecated;" 1406 " use multifd compression methods instead"); 1407 s->parameters.compress_level = params->compress_level; 1408 } 1409 1410 if (params->has_compress_threads) { 1411 warn_report("old compression is deprecated;" 1412 " use multifd compression methods instead"); 1413 s->parameters.compress_threads = params->compress_threads; 1414 } 1415 1416 if (params->has_compress_wait_thread) { 1417 warn_report("old compression is deprecated;" 1418 " use multifd compression methods instead"); 1419 s->parameters.compress_wait_thread = params->compress_wait_thread; 1420 } 1421 1422 if (params->has_decompress_threads) { 1423 warn_report("old compression is deprecated;" 1424 " use multifd compression methods instead"); 1425 s->parameters.decompress_threads = params->decompress_threads; 1426 } 1427 1428 if (params->has_throttle_trigger_threshold) { 1429 s->parameters.throttle_trigger_threshold = params->throttle_trigger_threshold; 1430 } 1431 1432 if (params->has_cpu_throttle_initial) { 1433 s->parameters.cpu_throttle_initial = params->cpu_throttle_initial; 1434 } 1435 1436 if (params->has_cpu_throttle_increment) { 1437 s->parameters.cpu_throttle_increment = params->cpu_throttle_increment; 1438 } 1439 1440 if (params->has_cpu_throttle_tailslow) { 1441 s->parameters.cpu_throttle_tailslow = params->cpu_throttle_tailslow; 1442 } 1443 1444 if (params->tls_creds) { 1445 g_free(s->parameters.tls_creds); 1446 assert(params->tls_creds->type == QTYPE_QSTRING); 1447 s->parameters.tls_creds = g_strdup(params->tls_creds->u.s); 1448 } 1449 1450 if (params->tls_hostname) { 1451 g_free(s->parameters.tls_hostname); 1452 assert(params->tls_hostname->type == QTYPE_QSTRING); 1453 s->parameters.tls_hostname = g_strdup(params->tls_hostname->u.s); 1454 } 1455 1456 if (params->tls_authz) { 1457 g_free(s->parameters.tls_authz); 1458 assert(params->tls_authz->type == QTYPE_QSTRING); 1459 s->parameters.tls_authz = g_strdup(params->tls_authz->u.s); 1460 } 1461 1462 if (params->has_max_bandwidth) { 1463 s->parameters.max_bandwidth = params->max_bandwidth; 1464 if (s->to_dst_file && !migration_in_postcopy()) { 1465 migration_rate_set(s->parameters.max_bandwidth); 1466 } 1467 } 1468 1469 if (params->has_avail_switchover_bandwidth) { 1470 s->parameters.avail_switchover_bandwidth = params->avail_switchover_bandwidth; 1471 } 1472 1473 if (params->has_downtime_limit) { 1474 s->parameters.downtime_limit = params->downtime_limit; 1475 } 1476 1477 if (params->has_x_checkpoint_delay) { 1478 s->parameters.x_checkpoint_delay = params->x_checkpoint_delay; 1479 colo_checkpoint_delay_set(); 1480 } 1481 1482 if (params->has_multifd_channels) { 1483 s->parameters.multifd_channels = params->multifd_channels; 1484 } 1485 if (params->has_multifd_compression) { 1486 s->parameters.multifd_compression = params->multifd_compression; 1487 } 1488 if (params->has_multifd_zlib_level) { 1489 s->parameters.multifd_zlib_level = params->multifd_zlib_level; 1490 } 1491 if (params->has_multifd_zstd_level) { 1492 s->parameters.multifd_zstd_level = params->multifd_zstd_level; 1493 } 1494 if (params->has_xbzrle_cache_size) { 1495 s->parameters.xbzrle_cache_size = params->xbzrle_cache_size; 1496 xbzrle_cache_resize(params->xbzrle_cache_size, errp); 1497 } 1498 if (params->has_max_postcopy_bandwidth) { 1499 s->parameters.max_postcopy_bandwidth = params->max_postcopy_bandwidth; 1500 if (s->to_dst_file && migration_in_postcopy()) { 1501 migration_rate_set(s->parameters.max_postcopy_bandwidth); 1502 } 1503 } 1504 if (params->has_max_cpu_throttle) { 1505 s->parameters.max_cpu_throttle = params->max_cpu_throttle; 1506 } 1507 if (params->has_announce_initial) { 1508 s->parameters.announce_initial = params->announce_initial; 1509 } 1510 if (params->has_announce_max) { 1511 s->parameters.announce_max = params->announce_max; 1512 } 1513 if (params->has_announce_rounds) { 1514 s->parameters.announce_rounds = params->announce_rounds; 1515 } 1516 if (params->has_announce_step) { 1517 s->parameters.announce_step = params->announce_step; 1518 } 1519 1520 if (params->has_block_bitmap_mapping) { 1521 qapi_free_BitmapMigrationNodeAliasList( 1522 s->parameters.block_bitmap_mapping); 1523 1524 s->parameters.has_block_bitmap_mapping = true; 1525 s->parameters.block_bitmap_mapping = 1526 QAPI_CLONE(BitmapMigrationNodeAliasList, 1527 params->block_bitmap_mapping); 1528 } 1529 1530 if (params->has_x_vcpu_dirty_limit_period) { 1531 s->parameters.x_vcpu_dirty_limit_period = 1532 params->x_vcpu_dirty_limit_period; 1533 } 1534 if (params->has_vcpu_dirty_limit) { 1535 s->parameters.vcpu_dirty_limit = params->vcpu_dirty_limit; 1536 } 1537 1538 if (params->has_mode) { 1539 s->parameters.mode = params->mode; 1540 } 1541 1542 if (params->has_zero_page_detection) { 1543 s->parameters.zero_page_detection = params->zero_page_detection; 1544 } 1545 } 1546 1547 void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp) 1548 { 1549 MigrationParameters tmp; 1550 1551 /* TODO Rewrite "" to null instead for all three tls_* parameters */ 1552 if (params->tls_creds 1553 && params->tls_creds->type == QTYPE_QNULL) { 1554 qobject_unref(params->tls_creds->u.n); 1555 params->tls_creds->type = QTYPE_QSTRING; 1556 params->tls_creds->u.s = strdup(""); 1557 } 1558 if (params->tls_hostname 1559 && params->tls_hostname->type == QTYPE_QNULL) { 1560 qobject_unref(params->tls_hostname->u.n); 1561 params->tls_hostname->type = QTYPE_QSTRING; 1562 params->tls_hostname->u.s = strdup(""); 1563 } 1564 if (params->tls_authz 1565 && params->tls_authz->type == QTYPE_QNULL) { 1566 qobject_unref(params->tls_authz->u.n); 1567 params->tls_authz->type = QTYPE_QSTRING; 1568 params->tls_authz->u.s = strdup(""); 1569 } 1570 1571 migrate_params_test_apply(params, &tmp); 1572 1573 if (!migrate_params_check(&tmp, errp)) { 1574 /* Invalid parameter */ 1575 return; 1576 } 1577 1578 migrate_params_apply(params, errp); 1579 } 1580