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), 182 183 /* Migration capabilities */ 184 DEFINE_PROP_MIG_CAP("x-xbzrle", MIGRATION_CAPABILITY_XBZRLE), 185 DEFINE_PROP_MIG_CAP("x-rdma-pin-all", MIGRATION_CAPABILITY_RDMA_PIN_ALL), 186 DEFINE_PROP_MIG_CAP("x-auto-converge", MIGRATION_CAPABILITY_AUTO_CONVERGE), 187 DEFINE_PROP_MIG_CAP("x-zero-blocks", MIGRATION_CAPABILITY_ZERO_BLOCKS), 188 DEFINE_PROP_MIG_CAP("x-compress", MIGRATION_CAPABILITY_COMPRESS), 189 DEFINE_PROP_MIG_CAP("x-events", MIGRATION_CAPABILITY_EVENTS), 190 DEFINE_PROP_MIG_CAP("x-postcopy-ram", MIGRATION_CAPABILITY_POSTCOPY_RAM), 191 DEFINE_PROP_MIG_CAP("x-postcopy-preempt", 192 MIGRATION_CAPABILITY_POSTCOPY_PREEMPT), 193 DEFINE_PROP_MIG_CAP("x-colo", MIGRATION_CAPABILITY_X_COLO), 194 DEFINE_PROP_MIG_CAP("x-release-ram", MIGRATION_CAPABILITY_RELEASE_RAM), 195 DEFINE_PROP_MIG_CAP("x-block", MIGRATION_CAPABILITY_BLOCK), 196 DEFINE_PROP_MIG_CAP("x-return-path", MIGRATION_CAPABILITY_RETURN_PATH), 197 DEFINE_PROP_MIG_CAP("x-multifd", MIGRATION_CAPABILITY_MULTIFD), 198 DEFINE_PROP_MIG_CAP("x-background-snapshot", 199 MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT), 200 #ifdef CONFIG_LINUX 201 DEFINE_PROP_MIG_CAP("x-zero-copy-send", 202 MIGRATION_CAPABILITY_ZERO_COPY_SEND), 203 #endif 204 DEFINE_PROP_MIG_CAP("x-switchover-ack", 205 MIGRATION_CAPABILITY_SWITCHOVER_ACK), 206 DEFINE_PROP_MIG_CAP("x-dirty-limit", MIGRATION_CAPABILITY_DIRTY_LIMIT), 207 DEFINE_PROP_MIG_CAP("mapped-ram", MIGRATION_CAPABILITY_MAPPED_RAM), 208 DEFINE_PROP_END_OF_LIST(), 209 }; 210 211 bool migrate_auto_converge(void) 212 { 213 MigrationState *s = migrate_get_current(); 214 215 return s->capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; 216 } 217 218 bool migrate_background_snapshot(void) 219 { 220 MigrationState *s = migrate_get_current(); 221 222 return s->capabilities[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]; 223 } 224 225 bool migrate_block(void) 226 { 227 MigrationState *s = migrate_get_current(); 228 229 return s->capabilities[MIGRATION_CAPABILITY_BLOCK]; 230 } 231 232 bool migrate_colo(void) 233 { 234 MigrationState *s = migrate_get_current(); 235 236 return s->capabilities[MIGRATION_CAPABILITY_X_COLO]; 237 } 238 239 bool migrate_compress(void) 240 { 241 MigrationState *s = migrate_get_current(); 242 243 return s->capabilities[MIGRATION_CAPABILITY_COMPRESS]; 244 } 245 246 bool migrate_dirty_bitmaps(void) 247 { 248 MigrationState *s = migrate_get_current(); 249 250 return s->capabilities[MIGRATION_CAPABILITY_DIRTY_BITMAPS]; 251 } 252 253 bool migrate_dirty_limit(void) 254 { 255 MigrationState *s = migrate_get_current(); 256 257 return s->capabilities[MIGRATION_CAPABILITY_DIRTY_LIMIT]; 258 } 259 260 bool migrate_events(void) 261 { 262 MigrationState *s = migrate_get_current(); 263 264 return s->capabilities[MIGRATION_CAPABILITY_EVENTS]; 265 } 266 267 bool migrate_mapped_ram(void) 268 { 269 MigrationState *s = migrate_get_current(); 270 271 return s->capabilities[MIGRATION_CAPABILITY_MAPPED_RAM]; 272 } 273 274 bool migrate_ignore_shared(void) 275 { 276 MigrationState *s = migrate_get_current(); 277 278 return s->capabilities[MIGRATION_CAPABILITY_X_IGNORE_SHARED]; 279 } 280 281 bool migrate_late_block_activate(void) 282 { 283 MigrationState *s = migrate_get_current(); 284 285 return s->capabilities[MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE]; 286 } 287 288 bool migrate_multifd(void) 289 { 290 MigrationState *s = migrate_get_current(); 291 292 return s->capabilities[MIGRATION_CAPABILITY_MULTIFD]; 293 } 294 295 bool migrate_pause_before_switchover(void) 296 { 297 MigrationState *s = migrate_get_current(); 298 299 return s->capabilities[MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER]; 300 } 301 302 bool migrate_postcopy_blocktime(void) 303 { 304 MigrationState *s = migrate_get_current(); 305 306 return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME]; 307 } 308 309 bool migrate_postcopy_preempt(void) 310 { 311 MigrationState *s = migrate_get_current(); 312 313 return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT]; 314 } 315 316 bool migrate_postcopy_ram(void) 317 { 318 MigrationState *s = migrate_get_current(); 319 320 return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM]; 321 } 322 323 bool migrate_rdma_pin_all(void) 324 { 325 MigrationState *s = migrate_get_current(); 326 327 return s->capabilities[MIGRATION_CAPABILITY_RDMA_PIN_ALL]; 328 } 329 330 bool migrate_release_ram(void) 331 { 332 MigrationState *s = migrate_get_current(); 333 334 return s->capabilities[MIGRATION_CAPABILITY_RELEASE_RAM]; 335 } 336 337 bool migrate_return_path(void) 338 { 339 MigrationState *s = migrate_get_current(); 340 341 return s->capabilities[MIGRATION_CAPABILITY_RETURN_PATH]; 342 } 343 344 bool migrate_switchover_ack(void) 345 { 346 MigrationState *s = migrate_get_current(); 347 348 return s->capabilities[MIGRATION_CAPABILITY_SWITCHOVER_ACK]; 349 } 350 351 bool migrate_validate_uuid(void) 352 { 353 MigrationState *s = migrate_get_current(); 354 355 return s->capabilities[MIGRATION_CAPABILITY_VALIDATE_UUID]; 356 } 357 358 bool migrate_xbzrle(void) 359 { 360 MigrationState *s = migrate_get_current(); 361 362 return s->capabilities[MIGRATION_CAPABILITY_XBZRLE]; 363 } 364 365 bool migrate_zero_blocks(void) 366 { 367 MigrationState *s = migrate_get_current(); 368 369 return s->capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS]; 370 } 371 372 bool migrate_zero_copy_send(void) 373 { 374 MigrationState *s = migrate_get_current(); 375 376 return s->capabilities[MIGRATION_CAPABILITY_ZERO_COPY_SEND]; 377 } 378 379 /* pseudo capabilities */ 380 381 bool migrate_multifd_flush_after_each_section(void) 382 { 383 MigrationState *s = migrate_get_current(); 384 385 return s->multifd_flush_after_each_section; 386 } 387 388 bool migrate_postcopy(void) 389 { 390 return migrate_postcopy_ram() || migrate_dirty_bitmaps(); 391 } 392 393 bool migrate_rdma(void) 394 { 395 MigrationState *s = migrate_get_current(); 396 397 return s->rdma_migration; 398 } 399 400 bool migrate_tls(void) 401 { 402 MigrationState *s = migrate_get_current(); 403 404 return s->parameters.tls_creds && *s->parameters.tls_creds; 405 } 406 407 typedef enum WriteTrackingSupport { 408 WT_SUPPORT_UNKNOWN = 0, 409 WT_SUPPORT_ABSENT, 410 WT_SUPPORT_AVAILABLE, 411 WT_SUPPORT_COMPATIBLE 412 } WriteTrackingSupport; 413 414 static 415 WriteTrackingSupport migrate_query_write_tracking(void) 416 { 417 /* Check if kernel supports required UFFD features */ 418 if (!ram_write_tracking_available()) { 419 return WT_SUPPORT_ABSENT; 420 } 421 /* 422 * Check if current memory configuration is 423 * compatible with required UFFD features. 424 */ 425 if (!ram_write_tracking_compatible()) { 426 return WT_SUPPORT_AVAILABLE; 427 } 428 429 return WT_SUPPORT_COMPATIBLE; 430 } 431 432 /* Migration capabilities set */ 433 struct MigrateCapsSet { 434 int size; /* Capability set size */ 435 MigrationCapability caps[]; /* Variadic array of capabilities */ 436 }; 437 typedef struct MigrateCapsSet MigrateCapsSet; 438 439 /* Define and initialize MigrateCapsSet */ 440 #define INITIALIZE_MIGRATE_CAPS_SET(_name, ...) \ 441 MigrateCapsSet _name = { \ 442 .size = sizeof((int []) { __VA_ARGS__ }) / sizeof(int), \ 443 .caps = { __VA_ARGS__ } \ 444 } 445 446 /* Background-snapshot compatibility check list */ 447 static const 448 INITIALIZE_MIGRATE_CAPS_SET(check_caps_background_snapshot, 449 MIGRATION_CAPABILITY_POSTCOPY_RAM, 450 MIGRATION_CAPABILITY_DIRTY_BITMAPS, 451 MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME, 452 MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE, 453 MIGRATION_CAPABILITY_RETURN_PATH, 454 MIGRATION_CAPABILITY_MULTIFD, 455 MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER, 456 MIGRATION_CAPABILITY_AUTO_CONVERGE, 457 MIGRATION_CAPABILITY_RELEASE_RAM, 458 MIGRATION_CAPABILITY_RDMA_PIN_ALL, 459 MIGRATION_CAPABILITY_COMPRESS, 460 MIGRATION_CAPABILITY_XBZRLE, 461 MIGRATION_CAPABILITY_X_COLO, 462 MIGRATION_CAPABILITY_VALIDATE_UUID, 463 MIGRATION_CAPABILITY_ZERO_COPY_SEND); 464 465 static bool migrate_incoming_started(void) 466 { 467 return !!migration_incoming_get_current()->transport_data; 468 } 469 470 /** 471 * @migration_caps_check - check capability compatibility 472 * 473 * @old_caps: old capability list 474 * @new_caps: new capability list 475 * @errp: set *errp if the check failed, with reason 476 * 477 * Returns true if check passed, otherwise false. 478 */ 479 bool migrate_caps_check(bool *old_caps, bool *new_caps, Error **errp) 480 { 481 MigrationIncomingState *mis = migration_incoming_get_current(); 482 483 ERRP_GUARD(); 484 #ifndef CONFIG_LIVE_BLOCK_MIGRATION 485 if (new_caps[MIGRATION_CAPABILITY_BLOCK]) { 486 error_setg(errp, "QEMU compiled without old-style (blk/-b, inc/-i) " 487 "block migration"); 488 error_append_hint(errp, "Use blockdev-mirror with NBD instead.\n"); 489 return false; 490 } 491 #endif 492 if (new_caps[MIGRATION_CAPABILITY_BLOCK]) { 493 warn_report("block migration is deprecated;" 494 " use blockdev-mirror with NBD instead"); 495 } 496 497 if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) { 498 warn_report("old compression method is deprecated;" 499 " use multifd compression methods instead"); 500 } 501 502 #ifndef CONFIG_REPLICATION 503 if (new_caps[MIGRATION_CAPABILITY_X_COLO]) { 504 error_setg(errp, "QEMU compiled without replication module" 505 " can't enable COLO"); 506 error_append_hint(errp, "Please enable replication before COLO.\n"); 507 return false; 508 } 509 #endif 510 511 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 512 /* This check is reasonably expensive, so only when it's being 513 * set the first time, also it's only the destination that needs 514 * special support. 515 */ 516 if (!old_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM] && 517 runstate_check(RUN_STATE_INMIGRATE) && 518 !postcopy_ram_supported_by_host(mis, errp)) { 519 error_prepend(errp, "Postcopy is not supported: "); 520 return false; 521 } 522 523 if (new_caps[MIGRATION_CAPABILITY_X_IGNORE_SHARED]) { 524 error_setg(errp, "Postcopy is not compatible with ignore-shared"); 525 return false; 526 } 527 528 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 529 error_setg(errp, "Postcopy is not yet compatible with multifd"); 530 return false; 531 } 532 } 533 534 if (new_caps[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]) { 535 WriteTrackingSupport wt_support; 536 int idx; 537 /* 538 * Check if 'background-snapshot' capability is supported by 539 * host kernel and compatible with guest memory configuration. 540 */ 541 wt_support = migrate_query_write_tracking(); 542 if (wt_support < WT_SUPPORT_AVAILABLE) { 543 error_setg(errp, "Background-snapshot is not supported by host kernel"); 544 return false; 545 } 546 if (wt_support < WT_SUPPORT_COMPATIBLE) { 547 error_setg(errp, "Background-snapshot is not compatible " 548 "with guest memory configuration"); 549 return false; 550 } 551 552 /* 553 * Check if there are any migration capabilities 554 * incompatible with 'background-snapshot'. 555 */ 556 for (idx = 0; idx < check_caps_background_snapshot.size; idx++) { 557 int incomp_cap = check_caps_background_snapshot.caps[idx]; 558 if (new_caps[incomp_cap]) { 559 error_setg(errp, 560 "Background-snapshot is not compatible with %s", 561 MigrationCapability_str(incomp_cap)); 562 return false; 563 } 564 } 565 } 566 567 #ifdef CONFIG_LINUX 568 if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND] && 569 (!new_caps[MIGRATION_CAPABILITY_MULTIFD] || 570 new_caps[MIGRATION_CAPABILITY_COMPRESS] || 571 new_caps[MIGRATION_CAPABILITY_XBZRLE] || 572 migrate_multifd_compression() || 573 migrate_tls())) { 574 error_setg(errp, 575 "Zero copy only available for non-compressed non-TLS multifd migration"); 576 return false; 577 } 578 #else 579 if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND]) { 580 error_setg(errp, 581 "Zero copy currently only available on Linux"); 582 return false; 583 } 584 #endif 585 586 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT]) { 587 if (!new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 588 error_setg(errp, "Postcopy preempt requires postcopy-ram"); 589 return false; 590 } 591 592 /* 593 * Preempt mode requires urgent pages to be sent in separate 594 * channel, OTOH compression logic will disorder all pages into 595 * different compression channels, which is not compatible with the 596 * preempt assumptions on channel assignments. 597 */ 598 if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) { 599 error_setg(errp, "Postcopy preempt not compatible with compress"); 600 return false; 601 } 602 603 if (migrate_incoming_started()) { 604 error_setg(errp, 605 "Postcopy preempt must be set before incoming starts"); 606 return false; 607 } 608 } 609 610 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 611 if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) { 612 error_setg(errp, "Multifd is not compatible with compress"); 613 return false; 614 } 615 if (migrate_incoming_started()) { 616 error_setg(errp, "Multifd must be set before incoming starts"); 617 return false; 618 } 619 } 620 621 if (new_caps[MIGRATION_CAPABILITY_SWITCHOVER_ACK]) { 622 if (!new_caps[MIGRATION_CAPABILITY_RETURN_PATH]) { 623 error_setg(errp, "Capability 'switchover-ack' requires capability " 624 "'return-path'"); 625 return false; 626 } 627 } 628 if (new_caps[MIGRATION_CAPABILITY_DIRTY_LIMIT]) { 629 if (new_caps[MIGRATION_CAPABILITY_AUTO_CONVERGE]) { 630 error_setg(errp, "dirty-limit conflicts with auto-converge" 631 " either of then available currently"); 632 return false; 633 } 634 635 if (!kvm_enabled() || !kvm_dirty_ring_enabled()) { 636 error_setg(errp, "dirty-limit requires KVM with accelerator" 637 " property 'dirty-ring-size' set"); 638 return false; 639 } 640 } 641 642 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 643 if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) { 644 error_setg(errp, "Multifd is not compatible with xbzrle"); 645 return false; 646 } 647 } 648 649 if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) { 650 if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) { 651 error_setg(errp, "Compression is not compatible with xbzrle"); 652 return false; 653 } 654 } 655 656 if (new_caps[MIGRATION_CAPABILITY_MAPPED_RAM]) { 657 if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) { 658 error_setg(errp, 659 "Mapped-ram migration is incompatible with multifd"); 660 return false; 661 } 662 663 if (new_caps[MIGRATION_CAPABILITY_XBZRLE]) { 664 error_setg(errp, 665 "Mapped-ram migration is incompatible with xbzrle"); 666 return false; 667 } 668 669 if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) { 670 error_setg(errp, 671 "Mapped-ram migration is incompatible with compression"); 672 return false; 673 } 674 675 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 676 error_setg(errp, 677 "Mapped-ram migration is incompatible with postcopy"); 678 return false; 679 } 680 } 681 682 return true; 683 } 684 685 bool migrate_cap_set(int cap, bool value, Error **errp) 686 { 687 MigrationState *s = migrate_get_current(); 688 bool new_caps[MIGRATION_CAPABILITY__MAX]; 689 690 if (migration_is_running(s->state)) { 691 error_setg(errp, QERR_MIGRATION_ACTIVE); 692 return false; 693 } 694 695 memcpy(new_caps, s->capabilities, sizeof(new_caps)); 696 new_caps[cap] = value; 697 698 if (!migrate_caps_check(s->capabilities, new_caps, errp)) { 699 return false; 700 } 701 s->capabilities[cap] = value; 702 return true; 703 } 704 705 MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) 706 { 707 MigrationCapabilityStatusList *head = NULL, **tail = &head; 708 MigrationCapabilityStatus *caps; 709 MigrationState *s = migrate_get_current(); 710 int i; 711 712 for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { 713 #ifndef CONFIG_LIVE_BLOCK_MIGRATION 714 if (i == MIGRATION_CAPABILITY_BLOCK) { 715 continue; 716 } 717 #endif 718 caps = g_malloc0(sizeof(*caps)); 719 caps->capability = i; 720 caps->state = s->capabilities[i]; 721 QAPI_LIST_APPEND(tail, caps); 722 } 723 724 return head; 725 } 726 727 void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, 728 Error **errp) 729 { 730 MigrationState *s = migrate_get_current(); 731 MigrationCapabilityStatusList *cap; 732 bool new_caps[MIGRATION_CAPABILITY__MAX]; 733 734 if (migration_is_running(s->state) || migration_in_colo_state()) { 735 error_setg(errp, QERR_MIGRATION_ACTIVE); 736 return; 737 } 738 739 memcpy(new_caps, s->capabilities, sizeof(new_caps)); 740 for (cap = params; cap; cap = cap->next) { 741 new_caps[cap->value->capability] = cap->value->state; 742 } 743 744 if (!migrate_caps_check(s->capabilities, new_caps, errp)) { 745 return; 746 } 747 748 for (cap = params; cap; cap = cap->next) { 749 s->capabilities[cap->value->capability] = cap->value->state; 750 } 751 } 752 753 /* parameters */ 754 755 const BitmapMigrationNodeAliasList *migrate_block_bitmap_mapping(void) 756 { 757 MigrationState *s = migrate_get_current(); 758 759 return s->parameters.block_bitmap_mapping; 760 } 761 762 bool migrate_has_block_bitmap_mapping(void) 763 { 764 MigrationState *s = migrate_get_current(); 765 766 return s->parameters.has_block_bitmap_mapping; 767 } 768 769 bool migrate_block_incremental(void) 770 { 771 MigrationState *s = migrate_get_current(); 772 773 return s->parameters.block_incremental; 774 } 775 776 uint32_t migrate_checkpoint_delay(void) 777 { 778 MigrationState *s = migrate_get_current(); 779 780 return s->parameters.x_checkpoint_delay; 781 } 782 783 int migrate_compress_level(void) 784 { 785 MigrationState *s = migrate_get_current(); 786 787 return s->parameters.compress_level; 788 } 789 790 int migrate_compress_threads(void) 791 { 792 MigrationState *s = migrate_get_current(); 793 794 return s->parameters.compress_threads; 795 } 796 797 int migrate_compress_wait_thread(void) 798 { 799 MigrationState *s = migrate_get_current(); 800 801 return s->parameters.compress_wait_thread; 802 } 803 804 uint8_t migrate_cpu_throttle_increment(void) 805 { 806 MigrationState *s = migrate_get_current(); 807 808 return s->parameters.cpu_throttle_increment; 809 } 810 811 uint8_t migrate_cpu_throttle_initial(void) 812 { 813 MigrationState *s = migrate_get_current(); 814 815 return s->parameters.cpu_throttle_initial; 816 } 817 818 bool migrate_cpu_throttle_tailslow(void) 819 { 820 MigrationState *s = migrate_get_current(); 821 822 return s->parameters.cpu_throttle_tailslow; 823 } 824 825 int migrate_decompress_threads(void) 826 { 827 MigrationState *s = migrate_get_current(); 828 829 return s->parameters.decompress_threads; 830 } 831 832 uint64_t migrate_downtime_limit(void) 833 { 834 MigrationState *s = migrate_get_current(); 835 836 return s->parameters.downtime_limit; 837 } 838 839 uint8_t migrate_max_cpu_throttle(void) 840 { 841 MigrationState *s = migrate_get_current(); 842 843 return s->parameters.max_cpu_throttle; 844 } 845 846 uint64_t migrate_max_bandwidth(void) 847 { 848 MigrationState *s = migrate_get_current(); 849 850 return s->parameters.max_bandwidth; 851 } 852 853 uint64_t migrate_avail_switchover_bandwidth(void) 854 { 855 MigrationState *s = migrate_get_current(); 856 857 return s->parameters.avail_switchover_bandwidth; 858 } 859 860 uint64_t migrate_max_postcopy_bandwidth(void) 861 { 862 MigrationState *s = migrate_get_current(); 863 864 return s->parameters.max_postcopy_bandwidth; 865 } 866 867 MigMode migrate_mode(void) 868 { 869 MigrationState *s = migrate_get_current(); 870 MigMode mode = s->parameters.mode; 871 872 assert(mode >= 0 && mode < MIG_MODE__MAX); 873 return mode; 874 } 875 876 int migrate_multifd_channels(void) 877 { 878 MigrationState *s = migrate_get_current(); 879 880 return s->parameters.multifd_channels; 881 } 882 883 MultiFDCompression migrate_multifd_compression(void) 884 { 885 MigrationState *s = migrate_get_current(); 886 887 assert(s->parameters.multifd_compression < MULTIFD_COMPRESSION__MAX); 888 return s->parameters.multifd_compression; 889 } 890 891 int migrate_multifd_zlib_level(void) 892 { 893 MigrationState *s = migrate_get_current(); 894 895 return s->parameters.multifd_zlib_level; 896 } 897 898 int migrate_multifd_zstd_level(void) 899 { 900 MigrationState *s = migrate_get_current(); 901 902 return s->parameters.multifd_zstd_level; 903 } 904 905 uint8_t migrate_throttle_trigger_threshold(void) 906 { 907 MigrationState *s = migrate_get_current(); 908 909 return s->parameters.throttle_trigger_threshold; 910 } 911 912 const char *migrate_tls_authz(void) 913 { 914 MigrationState *s = migrate_get_current(); 915 916 return s->parameters.tls_authz; 917 } 918 919 const char *migrate_tls_creds(void) 920 { 921 MigrationState *s = migrate_get_current(); 922 923 return s->parameters.tls_creds; 924 } 925 926 const char *migrate_tls_hostname(void) 927 { 928 MigrationState *s = migrate_get_current(); 929 930 return s->parameters.tls_hostname; 931 } 932 933 uint64_t migrate_xbzrle_cache_size(void) 934 { 935 MigrationState *s = migrate_get_current(); 936 937 return s->parameters.xbzrle_cache_size; 938 } 939 940 /* parameter setters */ 941 942 void migrate_set_block_incremental(bool value) 943 { 944 MigrationState *s = migrate_get_current(); 945 946 s->parameters.block_incremental = value; 947 } 948 949 /* parameters helpers */ 950 951 void block_cleanup_parameters(void) 952 { 953 MigrationState *s = migrate_get_current(); 954 955 if (s->must_remove_block_options) { 956 /* setting to false can never fail */ 957 migrate_cap_set(MIGRATION_CAPABILITY_BLOCK, false, &error_abort); 958 migrate_set_block_incremental(false); 959 s->must_remove_block_options = false; 960 } 961 } 962 963 AnnounceParameters *migrate_announce_params(void) 964 { 965 static AnnounceParameters ap; 966 967 MigrationState *s = migrate_get_current(); 968 969 ap.initial = s->parameters.announce_initial; 970 ap.max = s->parameters.announce_max; 971 ap.rounds = s->parameters.announce_rounds; 972 ap.step = s->parameters.announce_step; 973 974 return ≈ 975 } 976 977 MigrationParameters *qmp_query_migrate_parameters(Error **errp) 978 { 979 MigrationParameters *params; 980 MigrationState *s = migrate_get_current(); 981 982 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 983 params = g_malloc0(sizeof(*params)); 984 params->has_compress_level = true; 985 params->compress_level = s->parameters.compress_level; 986 params->has_compress_threads = true; 987 params->compress_threads = s->parameters.compress_threads; 988 params->has_compress_wait_thread = true; 989 params->compress_wait_thread = s->parameters.compress_wait_thread; 990 params->has_decompress_threads = true; 991 params->decompress_threads = s->parameters.decompress_threads; 992 params->has_throttle_trigger_threshold = true; 993 params->throttle_trigger_threshold = s->parameters.throttle_trigger_threshold; 994 params->has_cpu_throttle_initial = true; 995 params->cpu_throttle_initial = s->parameters.cpu_throttle_initial; 996 params->has_cpu_throttle_increment = true; 997 params->cpu_throttle_increment = s->parameters.cpu_throttle_increment; 998 params->has_cpu_throttle_tailslow = true; 999 params->cpu_throttle_tailslow = s->parameters.cpu_throttle_tailslow; 1000 params->tls_creds = g_strdup(s->parameters.tls_creds); 1001 params->tls_hostname = g_strdup(s->parameters.tls_hostname); 1002 params->tls_authz = g_strdup(s->parameters.tls_authz ? 1003 s->parameters.tls_authz : ""); 1004 params->has_max_bandwidth = true; 1005 params->max_bandwidth = s->parameters.max_bandwidth; 1006 params->has_avail_switchover_bandwidth = true; 1007 params->avail_switchover_bandwidth = s->parameters.avail_switchover_bandwidth; 1008 params->has_downtime_limit = true; 1009 params->downtime_limit = s->parameters.downtime_limit; 1010 params->has_x_checkpoint_delay = true; 1011 params->x_checkpoint_delay = s->parameters.x_checkpoint_delay; 1012 params->has_block_incremental = true; 1013 params->block_incremental = s->parameters.block_incremental; 1014 params->has_multifd_channels = true; 1015 params->multifd_channels = s->parameters.multifd_channels; 1016 params->has_multifd_compression = true; 1017 params->multifd_compression = s->parameters.multifd_compression; 1018 params->has_multifd_zlib_level = true; 1019 params->multifd_zlib_level = s->parameters.multifd_zlib_level; 1020 params->has_multifd_zstd_level = true; 1021 params->multifd_zstd_level = s->parameters.multifd_zstd_level; 1022 params->has_xbzrle_cache_size = true; 1023 params->xbzrle_cache_size = s->parameters.xbzrle_cache_size; 1024 params->has_max_postcopy_bandwidth = true; 1025 params->max_postcopy_bandwidth = s->parameters.max_postcopy_bandwidth; 1026 params->has_max_cpu_throttle = true; 1027 params->max_cpu_throttle = s->parameters.max_cpu_throttle; 1028 params->has_announce_initial = true; 1029 params->announce_initial = s->parameters.announce_initial; 1030 params->has_announce_max = true; 1031 params->announce_max = s->parameters.announce_max; 1032 params->has_announce_rounds = true; 1033 params->announce_rounds = s->parameters.announce_rounds; 1034 params->has_announce_step = true; 1035 params->announce_step = s->parameters.announce_step; 1036 1037 if (s->parameters.has_block_bitmap_mapping) { 1038 params->has_block_bitmap_mapping = true; 1039 params->block_bitmap_mapping = 1040 QAPI_CLONE(BitmapMigrationNodeAliasList, 1041 s->parameters.block_bitmap_mapping); 1042 } 1043 1044 params->has_x_vcpu_dirty_limit_period = true; 1045 params->x_vcpu_dirty_limit_period = s->parameters.x_vcpu_dirty_limit_period; 1046 params->has_vcpu_dirty_limit = true; 1047 params->vcpu_dirty_limit = s->parameters.vcpu_dirty_limit; 1048 params->has_mode = true; 1049 params->mode = s->parameters.mode; 1050 1051 return params; 1052 } 1053 1054 void migrate_params_init(MigrationParameters *params) 1055 { 1056 params->tls_hostname = g_strdup(""); 1057 params->tls_creds = g_strdup(""); 1058 1059 /* Set has_* up only for parameter checks */ 1060 params->has_compress_level = true; 1061 params->has_compress_threads = true; 1062 params->has_compress_wait_thread = true; 1063 params->has_decompress_threads = true; 1064 params->has_throttle_trigger_threshold = true; 1065 params->has_cpu_throttle_initial = true; 1066 params->has_cpu_throttle_increment = true; 1067 params->has_cpu_throttle_tailslow = true; 1068 params->has_max_bandwidth = true; 1069 params->has_downtime_limit = true; 1070 params->has_x_checkpoint_delay = true; 1071 params->has_block_incremental = true; 1072 params->has_multifd_channels = true; 1073 params->has_multifd_compression = true; 1074 params->has_multifd_zlib_level = true; 1075 params->has_multifd_zstd_level = true; 1076 params->has_xbzrle_cache_size = true; 1077 params->has_max_postcopy_bandwidth = true; 1078 params->has_max_cpu_throttle = true; 1079 params->has_announce_initial = true; 1080 params->has_announce_max = true; 1081 params->has_announce_rounds = true; 1082 params->has_announce_step = true; 1083 params->has_x_vcpu_dirty_limit_period = true; 1084 params->has_vcpu_dirty_limit = true; 1085 params->has_mode = true; 1086 } 1087 1088 /* 1089 * Check whether the parameters are valid. Error will be put into errp 1090 * (if provided). Return true if valid, otherwise false. 1091 */ 1092 bool migrate_params_check(MigrationParameters *params, Error **errp) 1093 { 1094 if (params->has_compress_level && 1095 (params->compress_level > 9)) { 1096 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level", 1097 "a value between 0 and 9"); 1098 return false; 1099 } 1100 1101 if (params->has_compress_threads && (params->compress_threads < 1)) { 1102 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1103 "compress_threads", 1104 "a value between 1 and 255"); 1105 return false; 1106 } 1107 1108 if (params->has_decompress_threads && (params->decompress_threads < 1)) { 1109 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1110 "decompress_threads", 1111 "a value between 1 and 255"); 1112 return false; 1113 } 1114 1115 if (params->has_throttle_trigger_threshold && 1116 (params->throttle_trigger_threshold < 1 || 1117 params->throttle_trigger_threshold > 100)) { 1118 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1119 "throttle_trigger_threshold", 1120 "an integer in the range of 1 to 100"); 1121 return false; 1122 } 1123 1124 if (params->has_cpu_throttle_initial && 1125 (params->cpu_throttle_initial < 1 || 1126 params->cpu_throttle_initial > 99)) { 1127 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1128 "cpu_throttle_initial", 1129 "an integer in the range of 1 to 99"); 1130 return false; 1131 } 1132 1133 if (params->has_cpu_throttle_increment && 1134 (params->cpu_throttle_increment < 1 || 1135 params->cpu_throttle_increment > 99)) { 1136 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1137 "cpu_throttle_increment", 1138 "an integer in the range of 1 to 99"); 1139 return false; 1140 } 1141 1142 if (params->has_max_bandwidth && (params->max_bandwidth > SIZE_MAX)) { 1143 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1144 "max_bandwidth", 1145 "an integer in the range of 0 to "stringify(SIZE_MAX) 1146 " bytes/second"); 1147 return false; 1148 } 1149 1150 if (params->has_avail_switchover_bandwidth && 1151 (params->avail_switchover_bandwidth > SIZE_MAX)) { 1152 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1153 "avail_switchover_bandwidth", 1154 "an integer in the range of 0 to "stringify(SIZE_MAX) 1155 " bytes/second"); 1156 return false; 1157 } 1158 1159 if (params->has_downtime_limit && 1160 (params->downtime_limit > MAX_MIGRATE_DOWNTIME)) { 1161 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1162 "downtime_limit", 1163 "an integer in the range of 0 to " 1164 stringify(MAX_MIGRATE_DOWNTIME)" ms"); 1165 return false; 1166 } 1167 1168 /* x_checkpoint_delay is now always positive */ 1169 1170 if (params->has_multifd_channels && (params->multifd_channels < 1)) { 1171 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1172 "multifd_channels", 1173 "a value between 1 and 255"); 1174 return false; 1175 } 1176 1177 if (params->has_multifd_zlib_level && 1178 (params->multifd_zlib_level > 9)) { 1179 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zlib_level", 1180 "a value between 0 and 9"); 1181 return false; 1182 } 1183 1184 if (params->has_multifd_zstd_level && 1185 (params->multifd_zstd_level > 20)) { 1186 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zstd_level", 1187 "a value between 0 and 20"); 1188 return false; 1189 } 1190 1191 if (params->has_xbzrle_cache_size && 1192 (params->xbzrle_cache_size < qemu_target_page_size() || 1193 !is_power_of_2(params->xbzrle_cache_size))) { 1194 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1195 "xbzrle_cache_size", 1196 "a power of two no less than the target page size"); 1197 return false; 1198 } 1199 1200 if (params->has_max_cpu_throttle && 1201 (params->max_cpu_throttle < params->cpu_throttle_initial || 1202 params->max_cpu_throttle > 99)) { 1203 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1204 "max_cpu_throttle", 1205 "an integer in the range of cpu_throttle_initial to 99"); 1206 return false; 1207 } 1208 1209 if (params->has_announce_initial && 1210 params->announce_initial > 100000) { 1211 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1212 "announce_initial", 1213 "a value between 0 and 100000"); 1214 return false; 1215 } 1216 if (params->has_announce_max && 1217 params->announce_max > 100000) { 1218 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1219 "announce_max", 1220 "a value between 0 and 100000"); 1221 return false; 1222 } 1223 if (params->has_announce_rounds && 1224 params->announce_rounds > 1000) { 1225 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1226 "announce_rounds", 1227 "a value between 0 and 1000"); 1228 return false; 1229 } 1230 if (params->has_announce_step && 1231 (params->announce_step < 1 || 1232 params->announce_step > 10000)) { 1233 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1234 "announce_step", 1235 "a value between 0 and 10000"); 1236 return false; 1237 } 1238 1239 if (params->has_block_bitmap_mapping && 1240 !check_dirty_bitmap_mig_alias_map(params->block_bitmap_mapping, errp)) { 1241 error_prepend(errp, "Invalid mapping given for block-bitmap-mapping: "); 1242 return false; 1243 } 1244 1245 #ifdef CONFIG_LINUX 1246 if (migrate_zero_copy_send() && 1247 ((params->has_multifd_compression && params->multifd_compression) || 1248 (params->tls_creds && *params->tls_creds))) { 1249 error_setg(errp, 1250 "Zero copy only available for non-compressed non-TLS multifd migration"); 1251 return false; 1252 } 1253 #endif 1254 1255 if (params->has_x_vcpu_dirty_limit_period && 1256 (params->x_vcpu_dirty_limit_period < 1 || 1257 params->x_vcpu_dirty_limit_period > 1000)) { 1258 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1259 "x-vcpu-dirty-limit-period", 1260 "a value between 1 and 1000"); 1261 return false; 1262 } 1263 1264 if (params->has_vcpu_dirty_limit && 1265 (params->vcpu_dirty_limit < 1)) { 1266 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1267 "vcpu_dirty_limit", 1268 "is invalid, it must greater then 1 MB/s"); 1269 return false; 1270 } 1271 1272 return true; 1273 } 1274 1275 static void migrate_params_test_apply(MigrateSetParameters *params, 1276 MigrationParameters *dest) 1277 { 1278 *dest = migrate_get_current()->parameters; 1279 1280 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 1281 1282 if (params->has_compress_level) { 1283 dest->compress_level = params->compress_level; 1284 } 1285 1286 if (params->has_compress_threads) { 1287 dest->compress_threads = params->compress_threads; 1288 } 1289 1290 if (params->has_compress_wait_thread) { 1291 dest->compress_wait_thread = params->compress_wait_thread; 1292 } 1293 1294 if (params->has_decompress_threads) { 1295 dest->decompress_threads = params->decompress_threads; 1296 } 1297 1298 if (params->has_throttle_trigger_threshold) { 1299 dest->throttle_trigger_threshold = params->throttle_trigger_threshold; 1300 } 1301 1302 if (params->has_cpu_throttle_initial) { 1303 dest->cpu_throttle_initial = params->cpu_throttle_initial; 1304 } 1305 1306 if (params->has_cpu_throttle_increment) { 1307 dest->cpu_throttle_increment = params->cpu_throttle_increment; 1308 } 1309 1310 if (params->has_cpu_throttle_tailslow) { 1311 dest->cpu_throttle_tailslow = params->cpu_throttle_tailslow; 1312 } 1313 1314 if (params->tls_creds) { 1315 assert(params->tls_creds->type == QTYPE_QSTRING); 1316 dest->tls_creds = params->tls_creds->u.s; 1317 } 1318 1319 if (params->tls_hostname) { 1320 assert(params->tls_hostname->type == QTYPE_QSTRING); 1321 dest->tls_hostname = params->tls_hostname->u.s; 1322 } 1323 1324 if (params->has_max_bandwidth) { 1325 dest->max_bandwidth = params->max_bandwidth; 1326 } 1327 1328 if (params->has_avail_switchover_bandwidth) { 1329 dest->avail_switchover_bandwidth = params->avail_switchover_bandwidth; 1330 } 1331 1332 if (params->has_downtime_limit) { 1333 dest->downtime_limit = params->downtime_limit; 1334 } 1335 1336 if (params->has_x_checkpoint_delay) { 1337 dest->x_checkpoint_delay = params->x_checkpoint_delay; 1338 } 1339 1340 if (params->has_block_incremental) { 1341 dest->block_incremental = params->block_incremental; 1342 } 1343 if (params->has_multifd_channels) { 1344 dest->multifd_channels = params->multifd_channels; 1345 } 1346 if (params->has_multifd_compression) { 1347 dest->multifd_compression = params->multifd_compression; 1348 } 1349 if (params->has_multifd_zlib_level) { 1350 dest->multifd_zlib_level = params->multifd_zlib_level; 1351 } 1352 if (params->has_multifd_zstd_level) { 1353 dest->multifd_zstd_level = params->multifd_zstd_level; 1354 } 1355 if (params->has_xbzrle_cache_size) { 1356 dest->xbzrle_cache_size = params->xbzrle_cache_size; 1357 } 1358 if (params->has_max_postcopy_bandwidth) { 1359 dest->max_postcopy_bandwidth = params->max_postcopy_bandwidth; 1360 } 1361 if (params->has_max_cpu_throttle) { 1362 dest->max_cpu_throttle = params->max_cpu_throttle; 1363 } 1364 if (params->has_announce_initial) { 1365 dest->announce_initial = params->announce_initial; 1366 } 1367 if (params->has_announce_max) { 1368 dest->announce_max = params->announce_max; 1369 } 1370 if (params->has_announce_rounds) { 1371 dest->announce_rounds = params->announce_rounds; 1372 } 1373 if (params->has_announce_step) { 1374 dest->announce_step = params->announce_step; 1375 } 1376 1377 if (params->has_block_bitmap_mapping) { 1378 dest->has_block_bitmap_mapping = true; 1379 dest->block_bitmap_mapping = params->block_bitmap_mapping; 1380 } 1381 1382 if (params->has_x_vcpu_dirty_limit_period) { 1383 dest->x_vcpu_dirty_limit_period = 1384 params->x_vcpu_dirty_limit_period; 1385 } 1386 if (params->has_vcpu_dirty_limit) { 1387 dest->vcpu_dirty_limit = params->vcpu_dirty_limit; 1388 } 1389 1390 if (params->has_mode) { 1391 dest->mode = params->mode; 1392 } 1393 } 1394 1395 static void migrate_params_apply(MigrateSetParameters *params, Error **errp) 1396 { 1397 MigrationState *s = migrate_get_current(); 1398 1399 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 1400 1401 if (params->has_compress_level) { 1402 warn_report("old compression is deprecated;" 1403 " use multifd compression methods instead"); 1404 s->parameters.compress_level = params->compress_level; 1405 } 1406 1407 if (params->has_compress_threads) { 1408 warn_report("old compression is deprecated;" 1409 " use multifd compression methods instead"); 1410 s->parameters.compress_threads = params->compress_threads; 1411 } 1412 1413 if (params->has_compress_wait_thread) { 1414 warn_report("old compression is deprecated;" 1415 " use multifd compression methods instead"); 1416 s->parameters.compress_wait_thread = params->compress_wait_thread; 1417 } 1418 1419 if (params->has_decompress_threads) { 1420 warn_report("old compression is deprecated;" 1421 " use multifd compression methods instead"); 1422 s->parameters.decompress_threads = params->decompress_threads; 1423 } 1424 1425 if (params->has_throttle_trigger_threshold) { 1426 s->parameters.throttle_trigger_threshold = params->throttle_trigger_threshold; 1427 } 1428 1429 if (params->has_cpu_throttle_initial) { 1430 s->parameters.cpu_throttle_initial = params->cpu_throttle_initial; 1431 } 1432 1433 if (params->has_cpu_throttle_increment) { 1434 s->parameters.cpu_throttle_increment = params->cpu_throttle_increment; 1435 } 1436 1437 if (params->has_cpu_throttle_tailslow) { 1438 s->parameters.cpu_throttle_tailslow = params->cpu_throttle_tailslow; 1439 } 1440 1441 if (params->tls_creds) { 1442 g_free(s->parameters.tls_creds); 1443 assert(params->tls_creds->type == QTYPE_QSTRING); 1444 s->parameters.tls_creds = g_strdup(params->tls_creds->u.s); 1445 } 1446 1447 if (params->tls_hostname) { 1448 g_free(s->parameters.tls_hostname); 1449 assert(params->tls_hostname->type == QTYPE_QSTRING); 1450 s->parameters.tls_hostname = g_strdup(params->tls_hostname->u.s); 1451 } 1452 1453 if (params->tls_authz) { 1454 g_free(s->parameters.tls_authz); 1455 assert(params->tls_authz->type == QTYPE_QSTRING); 1456 s->parameters.tls_authz = g_strdup(params->tls_authz->u.s); 1457 } 1458 1459 if (params->has_max_bandwidth) { 1460 s->parameters.max_bandwidth = params->max_bandwidth; 1461 if (s->to_dst_file && !migration_in_postcopy()) { 1462 migration_rate_set(s->parameters.max_bandwidth); 1463 } 1464 } 1465 1466 if (params->has_avail_switchover_bandwidth) { 1467 s->parameters.avail_switchover_bandwidth = params->avail_switchover_bandwidth; 1468 } 1469 1470 if (params->has_downtime_limit) { 1471 s->parameters.downtime_limit = params->downtime_limit; 1472 } 1473 1474 if (params->has_x_checkpoint_delay) { 1475 s->parameters.x_checkpoint_delay = params->x_checkpoint_delay; 1476 colo_checkpoint_delay_set(); 1477 } 1478 1479 if (params->has_block_incremental) { 1480 warn_report("block migration is deprecated;" 1481 " use blockdev-mirror with NBD instead"); 1482 s->parameters.block_incremental = params->block_incremental; 1483 } 1484 if (params->has_multifd_channels) { 1485 s->parameters.multifd_channels = params->multifd_channels; 1486 } 1487 if (params->has_multifd_compression) { 1488 s->parameters.multifd_compression = params->multifd_compression; 1489 } 1490 if (params->has_multifd_zlib_level) { 1491 s->parameters.multifd_zlib_level = params->multifd_zlib_level; 1492 } 1493 if (params->has_multifd_zstd_level) { 1494 s->parameters.multifd_zstd_level = params->multifd_zstd_level; 1495 } 1496 if (params->has_xbzrle_cache_size) { 1497 s->parameters.xbzrle_cache_size = params->xbzrle_cache_size; 1498 xbzrle_cache_resize(params->xbzrle_cache_size, errp); 1499 } 1500 if (params->has_max_postcopy_bandwidth) { 1501 s->parameters.max_postcopy_bandwidth = params->max_postcopy_bandwidth; 1502 if (s->to_dst_file && migration_in_postcopy()) { 1503 migration_rate_set(s->parameters.max_postcopy_bandwidth); 1504 } 1505 } 1506 if (params->has_max_cpu_throttle) { 1507 s->parameters.max_cpu_throttle = params->max_cpu_throttle; 1508 } 1509 if (params->has_announce_initial) { 1510 s->parameters.announce_initial = params->announce_initial; 1511 } 1512 if (params->has_announce_max) { 1513 s->parameters.announce_max = params->announce_max; 1514 } 1515 if (params->has_announce_rounds) { 1516 s->parameters.announce_rounds = params->announce_rounds; 1517 } 1518 if (params->has_announce_step) { 1519 s->parameters.announce_step = params->announce_step; 1520 } 1521 1522 if (params->has_block_bitmap_mapping) { 1523 qapi_free_BitmapMigrationNodeAliasList( 1524 s->parameters.block_bitmap_mapping); 1525 1526 s->parameters.has_block_bitmap_mapping = true; 1527 s->parameters.block_bitmap_mapping = 1528 QAPI_CLONE(BitmapMigrationNodeAliasList, 1529 params->block_bitmap_mapping); 1530 } 1531 1532 if (params->has_x_vcpu_dirty_limit_period) { 1533 s->parameters.x_vcpu_dirty_limit_period = 1534 params->x_vcpu_dirty_limit_period; 1535 } 1536 if (params->has_vcpu_dirty_limit) { 1537 s->parameters.vcpu_dirty_limit = params->vcpu_dirty_limit; 1538 } 1539 1540 if (params->has_mode) { 1541 s->parameters.mode = params->mode; 1542 } 1543 } 1544 1545 void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp) 1546 { 1547 MigrationParameters tmp; 1548 1549 /* TODO Rewrite "" to null instead for all three tls_* parameters */ 1550 if (params->tls_creds 1551 && params->tls_creds->type == QTYPE_QNULL) { 1552 qobject_unref(params->tls_creds->u.n); 1553 params->tls_creds->type = QTYPE_QSTRING; 1554 params->tls_creds->u.s = strdup(""); 1555 } 1556 if (params->tls_hostname 1557 && params->tls_hostname->type == QTYPE_QNULL) { 1558 qobject_unref(params->tls_hostname->u.n); 1559 params->tls_hostname->type = QTYPE_QSTRING; 1560 params->tls_hostname->u.s = strdup(""); 1561 } 1562 if (params->tls_authz 1563 && params->tls_authz->type == QTYPE_QNULL) { 1564 qobject_unref(params->tls_authz->u.n); 1565 params->tls_authz->type = QTYPE_QSTRING; 1566 params->tls_authz->u.s = strdup(""); 1567 } 1568 1569 migrate_params_test_apply(params, &tmp); 1570 1571 if (!migrate_params_check(&tmp, errp)) { 1572 /* Invalid parameter */ 1573 return; 1574 } 1575 1576 migrate_params_apply(params, errp); 1577 } 1578