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_XBZRLE]) { 658 error_setg(errp, 659 "Mapped-ram migration is incompatible with xbzrle"); 660 return false; 661 } 662 663 if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) { 664 error_setg(errp, 665 "Mapped-ram migration is incompatible with compression"); 666 return false; 667 } 668 669 if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { 670 error_setg(errp, 671 "Mapped-ram migration is incompatible with postcopy"); 672 return false; 673 } 674 } 675 676 return true; 677 } 678 679 bool migrate_cap_set(int cap, bool value, Error **errp) 680 { 681 MigrationState *s = migrate_get_current(); 682 bool new_caps[MIGRATION_CAPABILITY__MAX]; 683 684 if (migration_is_running(s->state)) { 685 error_setg(errp, QERR_MIGRATION_ACTIVE); 686 return false; 687 } 688 689 memcpy(new_caps, s->capabilities, sizeof(new_caps)); 690 new_caps[cap] = value; 691 692 if (!migrate_caps_check(s->capabilities, new_caps, errp)) { 693 return false; 694 } 695 s->capabilities[cap] = value; 696 return true; 697 } 698 699 MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) 700 { 701 MigrationCapabilityStatusList *head = NULL, **tail = &head; 702 MigrationCapabilityStatus *caps; 703 MigrationState *s = migrate_get_current(); 704 int i; 705 706 for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { 707 #ifndef CONFIG_LIVE_BLOCK_MIGRATION 708 if (i == MIGRATION_CAPABILITY_BLOCK) { 709 continue; 710 } 711 #endif 712 caps = g_malloc0(sizeof(*caps)); 713 caps->capability = i; 714 caps->state = s->capabilities[i]; 715 QAPI_LIST_APPEND(tail, caps); 716 } 717 718 return head; 719 } 720 721 void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, 722 Error **errp) 723 { 724 MigrationState *s = migrate_get_current(); 725 MigrationCapabilityStatusList *cap; 726 bool new_caps[MIGRATION_CAPABILITY__MAX]; 727 728 if (migration_is_running(s->state) || migration_in_colo_state()) { 729 error_setg(errp, QERR_MIGRATION_ACTIVE); 730 return; 731 } 732 733 memcpy(new_caps, s->capabilities, sizeof(new_caps)); 734 for (cap = params; cap; cap = cap->next) { 735 new_caps[cap->value->capability] = cap->value->state; 736 } 737 738 if (!migrate_caps_check(s->capabilities, new_caps, errp)) { 739 return; 740 } 741 742 for (cap = params; cap; cap = cap->next) { 743 s->capabilities[cap->value->capability] = cap->value->state; 744 } 745 } 746 747 /* parameters */ 748 749 const BitmapMigrationNodeAliasList *migrate_block_bitmap_mapping(void) 750 { 751 MigrationState *s = migrate_get_current(); 752 753 return s->parameters.block_bitmap_mapping; 754 } 755 756 bool migrate_has_block_bitmap_mapping(void) 757 { 758 MigrationState *s = migrate_get_current(); 759 760 return s->parameters.has_block_bitmap_mapping; 761 } 762 763 bool migrate_block_incremental(void) 764 { 765 MigrationState *s = migrate_get_current(); 766 767 return s->parameters.block_incremental; 768 } 769 770 uint32_t migrate_checkpoint_delay(void) 771 { 772 MigrationState *s = migrate_get_current(); 773 774 return s->parameters.x_checkpoint_delay; 775 } 776 777 int migrate_compress_level(void) 778 { 779 MigrationState *s = migrate_get_current(); 780 781 return s->parameters.compress_level; 782 } 783 784 int migrate_compress_threads(void) 785 { 786 MigrationState *s = migrate_get_current(); 787 788 return s->parameters.compress_threads; 789 } 790 791 int migrate_compress_wait_thread(void) 792 { 793 MigrationState *s = migrate_get_current(); 794 795 return s->parameters.compress_wait_thread; 796 } 797 798 uint8_t migrate_cpu_throttle_increment(void) 799 { 800 MigrationState *s = migrate_get_current(); 801 802 return s->parameters.cpu_throttle_increment; 803 } 804 805 uint8_t migrate_cpu_throttle_initial(void) 806 { 807 MigrationState *s = migrate_get_current(); 808 809 return s->parameters.cpu_throttle_initial; 810 } 811 812 bool migrate_cpu_throttle_tailslow(void) 813 { 814 MigrationState *s = migrate_get_current(); 815 816 return s->parameters.cpu_throttle_tailslow; 817 } 818 819 int migrate_decompress_threads(void) 820 { 821 MigrationState *s = migrate_get_current(); 822 823 return s->parameters.decompress_threads; 824 } 825 826 uint64_t migrate_downtime_limit(void) 827 { 828 MigrationState *s = migrate_get_current(); 829 830 return s->parameters.downtime_limit; 831 } 832 833 uint8_t migrate_max_cpu_throttle(void) 834 { 835 MigrationState *s = migrate_get_current(); 836 837 return s->parameters.max_cpu_throttle; 838 } 839 840 uint64_t migrate_max_bandwidth(void) 841 { 842 MigrationState *s = migrate_get_current(); 843 844 return s->parameters.max_bandwidth; 845 } 846 847 uint64_t migrate_avail_switchover_bandwidth(void) 848 { 849 MigrationState *s = migrate_get_current(); 850 851 return s->parameters.avail_switchover_bandwidth; 852 } 853 854 uint64_t migrate_max_postcopy_bandwidth(void) 855 { 856 MigrationState *s = migrate_get_current(); 857 858 return s->parameters.max_postcopy_bandwidth; 859 } 860 861 MigMode migrate_mode(void) 862 { 863 MigrationState *s = migrate_get_current(); 864 MigMode mode = s->parameters.mode; 865 866 assert(mode >= 0 && mode < MIG_MODE__MAX); 867 return mode; 868 } 869 870 int migrate_multifd_channels(void) 871 { 872 MigrationState *s = migrate_get_current(); 873 874 return s->parameters.multifd_channels; 875 } 876 877 MultiFDCompression migrate_multifd_compression(void) 878 { 879 MigrationState *s = migrate_get_current(); 880 881 assert(s->parameters.multifd_compression < MULTIFD_COMPRESSION__MAX); 882 return s->parameters.multifd_compression; 883 } 884 885 int migrate_multifd_zlib_level(void) 886 { 887 MigrationState *s = migrate_get_current(); 888 889 return s->parameters.multifd_zlib_level; 890 } 891 892 int migrate_multifd_zstd_level(void) 893 { 894 MigrationState *s = migrate_get_current(); 895 896 return s->parameters.multifd_zstd_level; 897 } 898 899 uint8_t migrate_throttle_trigger_threshold(void) 900 { 901 MigrationState *s = migrate_get_current(); 902 903 return s->parameters.throttle_trigger_threshold; 904 } 905 906 const char *migrate_tls_authz(void) 907 { 908 MigrationState *s = migrate_get_current(); 909 910 return s->parameters.tls_authz; 911 } 912 913 const char *migrate_tls_creds(void) 914 { 915 MigrationState *s = migrate_get_current(); 916 917 return s->parameters.tls_creds; 918 } 919 920 const char *migrate_tls_hostname(void) 921 { 922 MigrationState *s = migrate_get_current(); 923 924 return s->parameters.tls_hostname; 925 } 926 927 uint64_t migrate_xbzrle_cache_size(void) 928 { 929 MigrationState *s = migrate_get_current(); 930 931 return s->parameters.xbzrle_cache_size; 932 } 933 934 /* parameter setters */ 935 936 void migrate_set_block_incremental(bool value) 937 { 938 MigrationState *s = migrate_get_current(); 939 940 s->parameters.block_incremental = value; 941 } 942 943 /* parameters helpers */ 944 945 void block_cleanup_parameters(void) 946 { 947 MigrationState *s = migrate_get_current(); 948 949 if (s->must_remove_block_options) { 950 /* setting to false can never fail */ 951 migrate_cap_set(MIGRATION_CAPABILITY_BLOCK, false, &error_abort); 952 migrate_set_block_incremental(false); 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_block_incremental = true; 1007 params->block_incremental = s->parameters.block_incremental; 1008 params->has_multifd_channels = true; 1009 params->multifd_channels = s->parameters.multifd_channels; 1010 params->has_multifd_compression = true; 1011 params->multifd_compression = s->parameters.multifd_compression; 1012 params->has_multifd_zlib_level = true; 1013 params->multifd_zlib_level = s->parameters.multifd_zlib_level; 1014 params->has_multifd_zstd_level = true; 1015 params->multifd_zstd_level = s->parameters.multifd_zstd_level; 1016 params->has_xbzrle_cache_size = true; 1017 params->xbzrle_cache_size = s->parameters.xbzrle_cache_size; 1018 params->has_max_postcopy_bandwidth = true; 1019 params->max_postcopy_bandwidth = s->parameters.max_postcopy_bandwidth; 1020 params->has_max_cpu_throttle = true; 1021 params->max_cpu_throttle = s->parameters.max_cpu_throttle; 1022 params->has_announce_initial = true; 1023 params->announce_initial = s->parameters.announce_initial; 1024 params->has_announce_max = true; 1025 params->announce_max = s->parameters.announce_max; 1026 params->has_announce_rounds = true; 1027 params->announce_rounds = s->parameters.announce_rounds; 1028 params->has_announce_step = true; 1029 params->announce_step = s->parameters.announce_step; 1030 1031 if (s->parameters.has_block_bitmap_mapping) { 1032 params->has_block_bitmap_mapping = true; 1033 params->block_bitmap_mapping = 1034 QAPI_CLONE(BitmapMigrationNodeAliasList, 1035 s->parameters.block_bitmap_mapping); 1036 } 1037 1038 params->has_x_vcpu_dirty_limit_period = true; 1039 params->x_vcpu_dirty_limit_period = s->parameters.x_vcpu_dirty_limit_period; 1040 params->has_vcpu_dirty_limit = true; 1041 params->vcpu_dirty_limit = s->parameters.vcpu_dirty_limit; 1042 params->has_mode = true; 1043 params->mode = s->parameters.mode; 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_block_incremental = true; 1066 params->has_multifd_channels = true; 1067 params->has_multifd_compression = true; 1068 params->has_multifd_zlib_level = true; 1069 params->has_multifd_zstd_level = true; 1070 params->has_xbzrle_cache_size = true; 1071 params->has_max_postcopy_bandwidth = true; 1072 params->has_max_cpu_throttle = true; 1073 params->has_announce_initial = true; 1074 params->has_announce_max = true; 1075 params->has_announce_rounds = true; 1076 params->has_announce_step = true; 1077 params->has_x_vcpu_dirty_limit_period = true; 1078 params->has_vcpu_dirty_limit = true; 1079 params->has_mode = 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 if (params->has_compress_level && 1089 (params->compress_level > 9)) { 1090 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level", 1091 "a value between 0 and 9"); 1092 return false; 1093 } 1094 1095 if (params->has_compress_threads && (params->compress_threads < 1)) { 1096 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1097 "compress_threads", 1098 "a value between 1 and 255"); 1099 return false; 1100 } 1101 1102 if (params->has_decompress_threads && (params->decompress_threads < 1)) { 1103 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1104 "decompress_threads", 1105 "a value between 1 and 255"); 1106 return false; 1107 } 1108 1109 if (params->has_throttle_trigger_threshold && 1110 (params->throttle_trigger_threshold < 1 || 1111 params->throttle_trigger_threshold > 100)) { 1112 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1113 "throttle_trigger_threshold", 1114 "an integer in the range of 1 to 100"); 1115 return false; 1116 } 1117 1118 if (params->has_cpu_throttle_initial && 1119 (params->cpu_throttle_initial < 1 || 1120 params->cpu_throttle_initial > 99)) { 1121 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1122 "cpu_throttle_initial", 1123 "an integer in the range of 1 to 99"); 1124 return false; 1125 } 1126 1127 if (params->has_cpu_throttle_increment && 1128 (params->cpu_throttle_increment < 1 || 1129 params->cpu_throttle_increment > 99)) { 1130 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1131 "cpu_throttle_increment", 1132 "an integer in the range of 1 to 99"); 1133 return false; 1134 } 1135 1136 if (params->has_max_bandwidth && (params->max_bandwidth > SIZE_MAX)) { 1137 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1138 "max_bandwidth", 1139 "an integer in the range of 0 to "stringify(SIZE_MAX) 1140 " bytes/second"); 1141 return false; 1142 } 1143 1144 if (params->has_avail_switchover_bandwidth && 1145 (params->avail_switchover_bandwidth > SIZE_MAX)) { 1146 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1147 "avail_switchover_bandwidth", 1148 "an integer in the range of 0 to "stringify(SIZE_MAX) 1149 " bytes/second"); 1150 return false; 1151 } 1152 1153 if (params->has_downtime_limit && 1154 (params->downtime_limit > MAX_MIGRATE_DOWNTIME)) { 1155 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1156 "downtime_limit", 1157 "an integer in the range of 0 to " 1158 stringify(MAX_MIGRATE_DOWNTIME)" ms"); 1159 return false; 1160 } 1161 1162 /* x_checkpoint_delay is now always positive */ 1163 1164 if (params->has_multifd_channels && (params->multifd_channels < 1)) { 1165 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1166 "multifd_channels", 1167 "a value between 1 and 255"); 1168 return false; 1169 } 1170 1171 if (params->has_multifd_zlib_level && 1172 (params->multifd_zlib_level > 9)) { 1173 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zlib_level", 1174 "a value between 0 and 9"); 1175 return false; 1176 } 1177 1178 if (params->has_multifd_zstd_level && 1179 (params->multifd_zstd_level > 20)) { 1180 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zstd_level", 1181 "a value between 0 and 20"); 1182 return false; 1183 } 1184 1185 if (params->has_xbzrle_cache_size && 1186 (params->xbzrle_cache_size < qemu_target_page_size() || 1187 !is_power_of_2(params->xbzrle_cache_size))) { 1188 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1189 "xbzrle_cache_size", 1190 "a power of two no less than the target page size"); 1191 return false; 1192 } 1193 1194 if (params->has_max_cpu_throttle && 1195 (params->max_cpu_throttle < params->cpu_throttle_initial || 1196 params->max_cpu_throttle > 99)) { 1197 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1198 "max_cpu_throttle", 1199 "an integer in the range of cpu_throttle_initial to 99"); 1200 return false; 1201 } 1202 1203 if (params->has_announce_initial && 1204 params->announce_initial > 100000) { 1205 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1206 "announce_initial", 1207 "a value between 0 and 100000"); 1208 return false; 1209 } 1210 if (params->has_announce_max && 1211 params->announce_max > 100000) { 1212 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1213 "announce_max", 1214 "a value between 0 and 100000"); 1215 return false; 1216 } 1217 if (params->has_announce_rounds && 1218 params->announce_rounds > 1000) { 1219 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1220 "announce_rounds", 1221 "a value between 0 and 1000"); 1222 return false; 1223 } 1224 if (params->has_announce_step && 1225 (params->announce_step < 1 || 1226 params->announce_step > 10000)) { 1227 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1228 "announce_step", 1229 "a value between 0 and 10000"); 1230 return false; 1231 } 1232 1233 if (params->has_block_bitmap_mapping && 1234 !check_dirty_bitmap_mig_alias_map(params->block_bitmap_mapping, errp)) { 1235 error_prepend(errp, "Invalid mapping given for block-bitmap-mapping: "); 1236 return false; 1237 } 1238 1239 #ifdef CONFIG_LINUX 1240 if (migrate_zero_copy_send() && 1241 ((params->has_multifd_compression && params->multifd_compression) || 1242 (params->tls_creds && *params->tls_creds))) { 1243 error_setg(errp, 1244 "Zero copy only available for non-compressed non-TLS multifd migration"); 1245 return false; 1246 } 1247 #endif 1248 1249 if (migrate_mapped_ram() && 1250 (migrate_multifd_compression() || migrate_tls())) { 1251 error_setg(errp, 1252 "Mapped-ram only available for non-compressed non-TLS multifd migration"); 1253 return false; 1254 } 1255 1256 if (params->has_x_vcpu_dirty_limit_period && 1257 (params->x_vcpu_dirty_limit_period < 1 || 1258 params->x_vcpu_dirty_limit_period > 1000)) { 1259 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1260 "x-vcpu-dirty-limit-period", 1261 "a value between 1 and 1000"); 1262 return false; 1263 } 1264 1265 if (params->has_vcpu_dirty_limit && 1266 (params->vcpu_dirty_limit < 1)) { 1267 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1268 "vcpu_dirty_limit", 1269 "is invalid, it must greater then 1 MB/s"); 1270 return false; 1271 } 1272 1273 return true; 1274 } 1275 1276 static void migrate_params_test_apply(MigrateSetParameters *params, 1277 MigrationParameters *dest) 1278 { 1279 *dest = migrate_get_current()->parameters; 1280 1281 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 1282 1283 if (params->has_compress_level) { 1284 dest->compress_level = params->compress_level; 1285 } 1286 1287 if (params->has_compress_threads) { 1288 dest->compress_threads = params->compress_threads; 1289 } 1290 1291 if (params->has_compress_wait_thread) { 1292 dest->compress_wait_thread = params->compress_wait_thread; 1293 } 1294 1295 if (params->has_decompress_threads) { 1296 dest->decompress_threads = params->decompress_threads; 1297 } 1298 1299 if (params->has_throttle_trigger_threshold) { 1300 dest->throttle_trigger_threshold = params->throttle_trigger_threshold; 1301 } 1302 1303 if (params->has_cpu_throttle_initial) { 1304 dest->cpu_throttle_initial = params->cpu_throttle_initial; 1305 } 1306 1307 if (params->has_cpu_throttle_increment) { 1308 dest->cpu_throttle_increment = params->cpu_throttle_increment; 1309 } 1310 1311 if (params->has_cpu_throttle_tailslow) { 1312 dest->cpu_throttle_tailslow = params->cpu_throttle_tailslow; 1313 } 1314 1315 if (params->tls_creds) { 1316 assert(params->tls_creds->type == QTYPE_QSTRING); 1317 dest->tls_creds = params->tls_creds->u.s; 1318 } 1319 1320 if (params->tls_hostname) { 1321 assert(params->tls_hostname->type == QTYPE_QSTRING); 1322 dest->tls_hostname = params->tls_hostname->u.s; 1323 } 1324 1325 if (params->has_max_bandwidth) { 1326 dest->max_bandwidth = params->max_bandwidth; 1327 } 1328 1329 if (params->has_avail_switchover_bandwidth) { 1330 dest->avail_switchover_bandwidth = params->avail_switchover_bandwidth; 1331 } 1332 1333 if (params->has_downtime_limit) { 1334 dest->downtime_limit = params->downtime_limit; 1335 } 1336 1337 if (params->has_x_checkpoint_delay) { 1338 dest->x_checkpoint_delay = params->x_checkpoint_delay; 1339 } 1340 1341 if (params->has_block_incremental) { 1342 dest->block_incremental = params->block_incremental; 1343 } 1344 if (params->has_multifd_channels) { 1345 dest->multifd_channels = params->multifd_channels; 1346 } 1347 if (params->has_multifd_compression) { 1348 dest->multifd_compression = params->multifd_compression; 1349 } 1350 if (params->has_multifd_zlib_level) { 1351 dest->multifd_zlib_level = params->multifd_zlib_level; 1352 } 1353 if (params->has_multifd_zstd_level) { 1354 dest->multifd_zstd_level = params->multifd_zstd_level; 1355 } 1356 if (params->has_xbzrle_cache_size) { 1357 dest->xbzrle_cache_size = params->xbzrle_cache_size; 1358 } 1359 if (params->has_max_postcopy_bandwidth) { 1360 dest->max_postcopy_bandwidth = params->max_postcopy_bandwidth; 1361 } 1362 if (params->has_max_cpu_throttle) { 1363 dest->max_cpu_throttle = params->max_cpu_throttle; 1364 } 1365 if (params->has_announce_initial) { 1366 dest->announce_initial = params->announce_initial; 1367 } 1368 if (params->has_announce_max) { 1369 dest->announce_max = params->announce_max; 1370 } 1371 if (params->has_announce_rounds) { 1372 dest->announce_rounds = params->announce_rounds; 1373 } 1374 if (params->has_announce_step) { 1375 dest->announce_step = params->announce_step; 1376 } 1377 1378 if (params->has_block_bitmap_mapping) { 1379 dest->has_block_bitmap_mapping = true; 1380 dest->block_bitmap_mapping = params->block_bitmap_mapping; 1381 } 1382 1383 if (params->has_x_vcpu_dirty_limit_period) { 1384 dest->x_vcpu_dirty_limit_period = 1385 params->x_vcpu_dirty_limit_period; 1386 } 1387 if (params->has_vcpu_dirty_limit) { 1388 dest->vcpu_dirty_limit = params->vcpu_dirty_limit; 1389 } 1390 1391 if (params->has_mode) { 1392 dest->mode = params->mode; 1393 } 1394 } 1395 1396 static void migrate_params_apply(MigrateSetParameters *params, Error **errp) 1397 { 1398 MigrationState *s = migrate_get_current(); 1399 1400 /* TODO use QAPI_CLONE() instead of duplicating it inline */ 1401 1402 if (params->has_compress_level) { 1403 warn_report("old compression is deprecated;" 1404 " use multifd compression methods instead"); 1405 s->parameters.compress_level = params->compress_level; 1406 } 1407 1408 if (params->has_compress_threads) { 1409 warn_report("old compression is deprecated;" 1410 " use multifd compression methods instead"); 1411 s->parameters.compress_threads = params->compress_threads; 1412 } 1413 1414 if (params->has_compress_wait_thread) { 1415 warn_report("old compression is deprecated;" 1416 " use multifd compression methods instead"); 1417 s->parameters.compress_wait_thread = params->compress_wait_thread; 1418 } 1419 1420 if (params->has_decompress_threads) { 1421 warn_report("old compression is deprecated;" 1422 " use multifd compression methods instead"); 1423 s->parameters.decompress_threads = params->decompress_threads; 1424 } 1425 1426 if (params->has_throttle_trigger_threshold) { 1427 s->parameters.throttle_trigger_threshold = params->throttle_trigger_threshold; 1428 } 1429 1430 if (params->has_cpu_throttle_initial) { 1431 s->parameters.cpu_throttle_initial = params->cpu_throttle_initial; 1432 } 1433 1434 if (params->has_cpu_throttle_increment) { 1435 s->parameters.cpu_throttle_increment = params->cpu_throttle_increment; 1436 } 1437 1438 if (params->has_cpu_throttle_tailslow) { 1439 s->parameters.cpu_throttle_tailslow = params->cpu_throttle_tailslow; 1440 } 1441 1442 if (params->tls_creds) { 1443 g_free(s->parameters.tls_creds); 1444 assert(params->tls_creds->type == QTYPE_QSTRING); 1445 s->parameters.tls_creds = g_strdup(params->tls_creds->u.s); 1446 } 1447 1448 if (params->tls_hostname) { 1449 g_free(s->parameters.tls_hostname); 1450 assert(params->tls_hostname->type == QTYPE_QSTRING); 1451 s->parameters.tls_hostname = g_strdup(params->tls_hostname->u.s); 1452 } 1453 1454 if (params->tls_authz) { 1455 g_free(s->parameters.tls_authz); 1456 assert(params->tls_authz->type == QTYPE_QSTRING); 1457 s->parameters.tls_authz = g_strdup(params->tls_authz->u.s); 1458 } 1459 1460 if (params->has_max_bandwidth) { 1461 s->parameters.max_bandwidth = params->max_bandwidth; 1462 if (s->to_dst_file && !migration_in_postcopy()) { 1463 migration_rate_set(s->parameters.max_bandwidth); 1464 } 1465 } 1466 1467 if (params->has_avail_switchover_bandwidth) { 1468 s->parameters.avail_switchover_bandwidth = params->avail_switchover_bandwidth; 1469 } 1470 1471 if (params->has_downtime_limit) { 1472 s->parameters.downtime_limit = params->downtime_limit; 1473 } 1474 1475 if (params->has_x_checkpoint_delay) { 1476 s->parameters.x_checkpoint_delay = params->x_checkpoint_delay; 1477 colo_checkpoint_delay_set(); 1478 } 1479 1480 if (params->has_block_incremental) { 1481 warn_report("block migration is deprecated;" 1482 " use blockdev-mirror with NBD instead"); 1483 s->parameters.block_incremental = params->block_incremental; 1484 } 1485 if (params->has_multifd_channels) { 1486 s->parameters.multifd_channels = params->multifd_channels; 1487 } 1488 if (params->has_multifd_compression) { 1489 s->parameters.multifd_compression = params->multifd_compression; 1490 } 1491 if (params->has_multifd_zlib_level) { 1492 s->parameters.multifd_zlib_level = params->multifd_zlib_level; 1493 } 1494 if (params->has_multifd_zstd_level) { 1495 s->parameters.multifd_zstd_level = params->multifd_zstd_level; 1496 } 1497 if (params->has_xbzrle_cache_size) { 1498 s->parameters.xbzrle_cache_size = params->xbzrle_cache_size; 1499 xbzrle_cache_resize(params->xbzrle_cache_size, errp); 1500 } 1501 if (params->has_max_postcopy_bandwidth) { 1502 s->parameters.max_postcopy_bandwidth = params->max_postcopy_bandwidth; 1503 if (s->to_dst_file && migration_in_postcopy()) { 1504 migration_rate_set(s->parameters.max_postcopy_bandwidth); 1505 } 1506 } 1507 if (params->has_max_cpu_throttle) { 1508 s->parameters.max_cpu_throttle = params->max_cpu_throttle; 1509 } 1510 if (params->has_announce_initial) { 1511 s->parameters.announce_initial = params->announce_initial; 1512 } 1513 if (params->has_announce_max) { 1514 s->parameters.announce_max = params->announce_max; 1515 } 1516 if (params->has_announce_rounds) { 1517 s->parameters.announce_rounds = params->announce_rounds; 1518 } 1519 if (params->has_announce_step) { 1520 s->parameters.announce_step = params->announce_step; 1521 } 1522 1523 if (params->has_block_bitmap_mapping) { 1524 qapi_free_BitmapMigrationNodeAliasList( 1525 s->parameters.block_bitmap_mapping); 1526 1527 s->parameters.has_block_bitmap_mapping = true; 1528 s->parameters.block_bitmap_mapping = 1529 QAPI_CLONE(BitmapMigrationNodeAliasList, 1530 params->block_bitmap_mapping); 1531 } 1532 1533 if (params->has_x_vcpu_dirty_limit_period) { 1534 s->parameters.x_vcpu_dirty_limit_period = 1535 params->x_vcpu_dirty_limit_period; 1536 } 1537 if (params->has_vcpu_dirty_limit) { 1538 s->parameters.vcpu_dirty_limit = params->vcpu_dirty_limit; 1539 } 1540 1541 if (params->has_mode) { 1542 s->parameters.mode = params->mode; 1543 } 1544 } 1545 1546 void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp) 1547 { 1548 MigrationParameters tmp; 1549 1550 /* TODO Rewrite "" to null instead for all three tls_* parameters */ 1551 if (params->tls_creds 1552 && params->tls_creds->type == QTYPE_QNULL) { 1553 qobject_unref(params->tls_creds->u.n); 1554 params->tls_creds->type = QTYPE_QSTRING; 1555 params->tls_creds->u.s = strdup(""); 1556 } 1557 if (params->tls_hostname 1558 && params->tls_hostname->type == QTYPE_QNULL) { 1559 qobject_unref(params->tls_hostname->u.n); 1560 params->tls_hostname->type = QTYPE_QSTRING; 1561 params->tls_hostname->u.s = strdup(""); 1562 } 1563 if (params->tls_authz 1564 && params->tls_authz->type == QTYPE_QNULL) { 1565 qobject_unref(params->tls_authz->u.n); 1566 params->tls_authz->type = QTYPE_QSTRING; 1567 params->tls_authz->u.s = strdup(""); 1568 } 1569 1570 migrate_params_test_apply(params, &tmp); 1571 1572 if (!migrate_params_check(&tmp, errp)) { 1573 /* Invalid parameter */ 1574 return; 1575 } 1576 1577 migrate_params_apply(params, errp); 1578 } 1579