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Commit | Line | Data |
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5bb7910a AL |
1 | /* |
2 | * QEMU live migration | |
3 | * | |
4 | * Copyright IBM, Corp. 2008 | |
5 | * | |
6 | * Authors: | |
7 | * Anthony Liguori <aliguori@us.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
10 | * the COPYING file in the top-level directory. | |
11 | * | |
6b620ca3 PB |
12 | * Contributions after 2012-01-13 are licensed under the terms of the |
13 | * GNU GPL, version 2 or (at your option) any later version. | |
5bb7910a AL |
14 | */ |
15 | ||
16 | #include "qemu-common.h" | |
d49b6836 | 17 | #include "qemu/error-report.h" |
6a1751b7 | 18 | #include "qemu/main-loop.h" |
caf71f86 | 19 | #include "migration/migration.h" |
0d82d0e8 | 20 | #include "migration/qemu-file.h" |
9c17d615 | 21 | #include "sysemu/sysemu.h" |
737e150e | 22 | #include "block/block.h" |
cc7a8ea7 | 23 | #include "qapi/qmp/qerror.h" |
1de7afc9 | 24 | #include "qemu/sockets.h" |
caf71f86 | 25 | #include "migration/block.h" |
766bd176 | 26 | #include "qemu/thread.h" |
791e7c82 | 27 | #include "qmp-commands.h" |
c09e5bb1 | 28 | #include "trace.h" |
df4b1024 | 29 | #include "qapi/util.h" |
065e2813 | 30 | |
d0ae46c1 | 31 | #define MAX_THROTTLE (32 << 20) /* Migration speed throttling */ |
5bb7910a | 32 | |
5b4e1eb7 JQ |
33 | /* Amount of time to allocate to each "chunk" of bandwidth-throttled |
34 | * data. */ | |
35 | #define BUFFER_DELAY 100 | |
36 | #define XFER_LIMIT_RATIO (1000 / BUFFER_DELAY) | |
37 | ||
8706d2d5 LL |
38 | /* Default compression thread count */ |
39 | #define DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT 8 | |
3fcb38c2 LL |
40 | /* Default decompression thread count, usually decompression is at |
41 | * least 4 times as fast as compression.*/ | |
42 | #define DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT 2 | |
8706d2d5 LL |
43 | /*0: means nocompress, 1: best speed, ... 9: best compress ratio */ |
44 | #define DEFAULT_MIGRATE_COMPRESS_LEVEL 1 | |
45 | ||
17ad9b35 OW |
46 | /* Migration XBZRLE default cache size */ |
47 | #define DEFAULT_MIGRATE_CACHE_SIZE (64 * 1024 * 1024) | |
48 | ||
99a0db9b GH |
49 | static NotifierList migration_state_notifiers = |
50 | NOTIFIER_LIST_INITIALIZER(migration_state_notifiers); | |
51 | ||
adde220a DDAG |
52 | static bool deferred_incoming; |
53 | ||
17549e84 JQ |
54 | /* When we add fault tolerance, we could have several |
55 | migrations at once. For now we don't need to add | |
56 | dynamic creation of migration */ | |
57 | ||
bca7856a | 58 | /* For outgoing */ |
859bc756 | 59 | MigrationState *migrate_get_current(void) |
17549e84 JQ |
60 | { |
61 | static MigrationState current_migration = { | |
31194731 | 62 | .state = MIGRATION_STATUS_NONE, |
d0ae46c1 | 63 | .bandwidth_limit = MAX_THROTTLE, |
17ad9b35 | 64 | .xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE, |
7e114f8c | 65 | .mbps = -1, |
43c60a81 LL |
66 | .parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = |
67 | DEFAULT_MIGRATE_COMPRESS_LEVEL, | |
68 | .parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = | |
69 | DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT, | |
70 | .parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = | |
71 | DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT, | |
17549e84 JQ |
72 | }; |
73 | ||
74 | return ¤t_migration; | |
75 | } | |
76 | ||
bca7856a DDAG |
77 | /* For incoming */ |
78 | static MigrationIncomingState *mis_current; | |
79 | ||
80 | MigrationIncomingState *migration_incoming_get_current(void) | |
81 | { | |
82 | return mis_current; | |
83 | } | |
84 | ||
85 | MigrationIncomingState *migration_incoming_state_new(QEMUFile* f) | |
86 | { | |
87 | mis_current = g_malloc0(sizeof(MigrationIncomingState)); | |
88 | mis_current->file = f; | |
1a8f46f8 | 89 | QLIST_INIT(&mis_current->loadvm_handlers); |
bca7856a DDAG |
90 | |
91 | return mis_current; | |
92 | } | |
93 | ||
94 | void migration_incoming_state_destroy(void) | |
95 | { | |
1a8f46f8 | 96 | loadvm_free_handlers(mis_current); |
bca7856a DDAG |
97 | g_free(mis_current); |
98 | mis_current = NULL; | |
99 | } | |
100 | ||
df4b1024 JQ |
101 | |
102 | typedef struct { | |
103 | uint32_t size; | |
104 | uint8_t runstate[100]; | |
105 | } GlobalState; | |
106 | ||
107 | static GlobalState global_state; | |
108 | ||
109 | static int global_state_store(void) | |
110 | { | |
111 | if (!runstate_store((char *)global_state.runstate, | |
112 | sizeof(global_state.runstate))) { | |
113 | error_report("runstate name too big: %s", global_state.runstate); | |
114 | trace_migrate_state_too_big(); | |
115 | return -EINVAL; | |
116 | } | |
117 | return 0; | |
118 | } | |
119 | ||
120 | static char *global_state_get_runstate(void) | |
121 | { | |
122 | return (char *)global_state.runstate; | |
123 | } | |
124 | ||
125 | static int global_state_post_load(void *opaque, int version_id) | |
126 | { | |
127 | GlobalState *s = opaque; | |
128 | int ret = 0; | |
129 | char *runstate = (char *)s->runstate; | |
130 | ||
131 | trace_migrate_global_state_post_load(runstate); | |
132 | ||
133 | if (strcmp(runstate, "running") != 0) { | |
134 | Error *local_err = NULL; | |
135 | int r = qapi_enum_parse(RunState_lookup, runstate, RUN_STATE_MAX, | |
136 | -1, &local_err); | |
137 | ||
138 | if (r == -1) { | |
139 | if (local_err) { | |
140 | error_report_err(local_err); | |
141 | } | |
142 | return -EINVAL; | |
143 | } | |
144 | ret = vm_stop_force_state(r); | |
145 | } | |
146 | ||
147 | return ret; | |
148 | } | |
149 | ||
150 | static void global_state_pre_save(void *opaque) | |
151 | { | |
152 | GlobalState *s = opaque; | |
153 | ||
154 | trace_migrate_global_state_pre_save((char *)s->runstate); | |
155 | s->size = strlen((char *)s->runstate) + 1; | |
156 | } | |
157 | ||
158 | static const VMStateDescription vmstate_globalstate = { | |
159 | .name = "globalstate", | |
160 | .version_id = 1, | |
161 | .minimum_version_id = 1, | |
162 | .post_load = global_state_post_load, | |
163 | .pre_save = global_state_pre_save, | |
164 | .fields = (VMStateField[]) { | |
165 | VMSTATE_UINT32(size, GlobalState), | |
166 | VMSTATE_BUFFER(runstate, GlobalState), | |
167 | VMSTATE_END_OF_LIST() | |
168 | }, | |
169 | }; | |
170 | ||
171 | void register_global_state(void) | |
172 | { | |
173 | /* We would use it independently that we receive it */ | |
174 | strcpy((char *)&global_state.runstate, ""); | |
175 | vmstate_register(NULL, 0, &vmstate_globalstate, &global_state); | |
176 | } | |
177 | ||
adde220a DDAG |
178 | /* |
179 | * Called on -incoming with a defer: uri. | |
180 | * The migration can be started later after any parameters have been | |
181 | * changed. | |
182 | */ | |
183 | static void deferred_incoming_migration(Error **errp) | |
184 | { | |
185 | if (deferred_incoming) { | |
186 | error_setg(errp, "Incoming migration already deferred"); | |
187 | } | |
188 | deferred_incoming = true; | |
189 | } | |
190 | ||
43eaae28 | 191 | void qemu_start_incoming_migration(const char *uri, Error **errp) |
5bb7910a | 192 | { |
34c9dd8e AL |
193 | const char *p; |
194 | ||
adde220a DDAG |
195 | if (!strcmp(uri, "defer")) { |
196 | deferred_incoming_migration(errp); | |
197 | } else if (strstart(uri, "tcp:", &p)) { | |
43eaae28 | 198 | tcp_start_incoming_migration(p, errp); |
2da776db | 199 | #ifdef CONFIG_RDMA |
adde220a | 200 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
201 | rdma_start_incoming_migration(p, errp); |
202 | #endif | |
065e2813 | 203 | #if !defined(WIN32) |
adde220a | 204 | } else if (strstart(uri, "exec:", &p)) { |
43eaae28 | 205 | exec_start_incoming_migration(p, errp); |
adde220a | 206 | } else if (strstart(uri, "unix:", &p)) { |
43eaae28 | 207 | unix_start_incoming_migration(p, errp); |
adde220a | 208 | } else if (strstart(uri, "fd:", &p)) { |
43eaae28 | 209 | fd_start_incoming_migration(p, errp); |
065e2813 | 210 | #endif |
adde220a | 211 | } else { |
312fd5f2 | 212 | error_setg(errp, "unknown migration protocol: %s", uri); |
8ca5e801 | 213 | } |
5bb7910a AL |
214 | } |
215 | ||
82a4da79 | 216 | static void process_incoming_migration_co(void *opaque) |
511c0231 | 217 | { |
82a4da79 | 218 | QEMUFile *f = opaque; |
5a8a30db | 219 | Error *local_err = NULL; |
1c12e1f5 PB |
220 | int ret; |
221 | ||
bca7856a DDAG |
222 | migration_incoming_state_new(f); |
223 | ||
1c12e1f5 | 224 | ret = qemu_loadvm_state(f); |
bca7856a | 225 | |
1c12e1f5 | 226 | qemu_fclose(f); |
905f26f2 | 227 | free_xbzrle_decoded_buf(); |
bca7856a DDAG |
228 | migration_incoming_state_destroy(); |
229 | ||
1c12e1f5 | 230 | if (ret < 0) { |
db80face | 231 | error_report("load of migration failed: %s", strerror(-ret)); |
3fcb38c2 | 232 | migrate_decompress_threads_join(); |
4aead692 | 233 | exit(EXIT_FAILURE); |
511c0231 JQ |
234 | } |
235 | qemu_announce_self(); | |
511c0231 | 236 | |
0f15423c | 237 | /* Make sure all file formats flush their mutable metadata */ |
5a8a30db KW |
238 | bdrv_invalidate_cache_all(&local_err); |
239 | if (local_err) { | |
97baf9d9 | 240 | error_report_err(local_err); |
3fcb38c2 | 241 | migrate_decompress_threads_join(); |
5a8a30db KW |
242 | exit(EXIT_FAILURE); |
243 | } | |
0f15423c | 244 | |
df4b1024 JQ |
245 | /* runstate == "" means that we haven't received it through the |
246 | * wire, so we obey autostart. runstate == runing means that we | |
247 | * need to run it, we need to make sure that we do it after | |
248 | * everything else has finished. Every other state change is done | |
249 | * at the post_load function */ | |
250 | ||
251 | if (strcmp(global_state_get_runstate(), "running") == 0) { | |
511c0231 | 252 | vm_start(); |
df4b1024 JQ |
253 | } else if (strcmp(global_state_get_runstate(), "") == 0) { |
254 | if (autostart) { | |
255 | vm_start(); | |
256 | } else { | |
257 | runstate_set(RUN_STATE_PAUSED); | |
258 | } | |
f5bbfba1 | 259 | } |
3fcb38c2 | 260 | migrate_decompress_threads_join(); |
511c0231 JQ |
261 | } |
262 | ||
82a4da79 PB |
263 | void process_incoming_migration(QEMUFile *f) |
264 | { | |
265 | Coroutine *co = qemu_coroutine_create(process_incoming_migration_co); | |
266 | int fd = qemu_get_fd(f); | |
267 | ||
268 | assert(fd != -1); | |
3fcb38c2 | 269 | migrate_decompress_threads_create(); |
f9e8cacc | 270 | qemu_set_nonblock(fd); |
82a4da79 PB |
271 | qemu_coroutine_enter(co, f); |
272 | } | |
273 | ||
a0a3fd60 GC |
274 | /* amount of nanoseconds we are willing to wait for migration to be down. |
275 | * the choice of nanoseconds is because it is the maximum resolution that | |
276 | * get_clock() can achieve. It is an internal measure. All user-visible | |
277 | * units must be in seconds */ | |
f7cd55a0 | 278 | static uint64_t max_downtime = 300000000; |
a0a3fd60 GC |
279 | |
280 | uint64_t migrate_max_downtime(void) | |
281 | { | |
282 | return max_downtime; | |
283 | } | |
284 | ||
bbf6da32 OW |
285 | MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) |
286 | { | |
287 | MigrationCapabilityStatusList *head = NULL; | |
288 | MigrationCapabilityStatusList *caps; | |
289 | MigrationState *s = migrate_get_current(); | |
290 | int i; | |
291 | ||
387eedeb | 292 | caps = NULL; /* silence compiler warning */ |
bbf6da32 OW |
293 | for (i = 0; i < MIGRATION_CAPABILITY_MAX; i++) { |
294 | if (head == NULL) { | |
295 | head = g_malloc0(sizeof(*caps)); | |
296 | caps = head; | |
297 | } else { | |
298 | caps->next = g_malloc0(sizeof(*caps)); | |
299 | caps = caps->next; | |
300 | } | |
301 | caps->value = | |
302 | g_malloc(sizeof(*caps->value)); | |
303 | caps->value->capability = i; | |
304 | caps->value->state = s->enabled_capabilities[i]; | |
305 | } | |
306 | ||
307 | return head; | |
308 | } | |
309 | ||
85de8323 LL |
310 | MigrationParameters *qmp_query_migrate_parameters(Error **errp) |
311 | { | |
312 | MigrationParameters *params; | |
313 | MigrationState *s = migrate_get_current(); | |
314 | ||
315 | params = g_malloc0(sizeof(*params)); | |
316 | params->compress_level = s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; | |
317 | params->compress_threads = | |
318 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; | |
319 | params->decompress_threads = | |
320 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; | |
321 | ||
322 | return params; | |
323 | } | |
324 | ||
f36d55af OW |
325 | static void get_xbzrle_cache_stats(MigrationInfo *info) |
326 | { | |
327 | if (migrate_use_xbzrle()) { | |
328 | info->has_xbzrle_cache = true; | |
329 | info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache)); | |
330 | info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size(); | |
331 | info->xbzrle_cache->bytes = xbzrle_mig_bytes_transferred(); | |
332 | info->xbzrle_cache->pages = xbzrle_mig_pages_transferred(); | |
333 | info->xbzrle_cache->cache_miss = xbzrle_mig_pages_cache_miss(); | |
8bc39233 | 334 | info->xbzrle_cache->cache_miss_rate = xbzrle_mig_cache_miss_rate(); |
f36d55af OW |
335 | info->xbzrle_cache->overflow = xbzrle_mig_pages_overflow(); |
336 | } | |
337 | } | |
338 | ||
791e7c82 | 339 | MigrationInfo *qmp_query_migrate(Error **errp) |
5bb7910a | 340 | { |
791e7c82 | 341 | MigrationInfo *info = g_malloc0(sizeof(*info)); |
17549e84 JQ |
342 | MigrationState *s = migrate_get_current(); |
343 | ||
344 | switch (s->state) { | |
31194731 | 345 | case MIGRATION_STATUS_NONE: |
17549e84 JQ |
346 | /* no migration has happened ever */ |
347 | break; | |
31194731 | 348 | case MIGRATION_STATUS_SETUP: |
29ae8a41 | 349 | info->has_status = true; |
ed4fbd10 | 350 | info->has_total_time = false; |
29ae8a41 | 351 | break; |
31194731 HZ |
352 | case MIGRATION_STATUS_ACTIVE: |
353 | case MIGRATION_STATUS_CANCELLING: | |
791e7c82 | 354 | info->has_status = true; |
7aa939af | 355 | info->has_total_time = true; |
bc72ad67 | 356 | info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) |
7aa939af | 357 | - s->total_time; |
2c52ddf1 JQ |
358 | info->has_expected_downtime = true; |
359 | info->expected_downtime = s->expected_downtime; | |
ed4fbd10 MH |
360 | info->has_setup_time = true; |
361 | info->setup_time = s->setup_time; | |
17549e84 | 362 | |
791e7c82 LC |
363 | info->has_ram = true; |
364 | info->ram = g_malloc0(sizeof(*info->ram)); | |
365 | info->ram->transferred = ram_bytes_transferred(); | |
366 | info->ram->remaining = ram_bytes_remaining(); | |
367 | info->ram->total = ram_bytes_total(); | |
004d4c10 | 368 | info->ram->duplicate = dup_mig_pages_transferred(); |
f1c72795 | 369 | info->ram->skipped = skipped_mig_pages_transferred(); |
004d4c10 OW |
370 | info->ram->normal = norm_mig_pages_transferred(); |
371 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
8d017193 | 372 | info->ram->dirty_pages_rate = s->dirty_pages_rate; |
7e114f8c | 373 | info->ram->mbps = s->mbps; |
58570ed8 | 374 | info->ram->dirty_sync_count = s->dirty_sync_count; |
8d017193 | 375 | |
17549e84 | 376 | if (blk_mig_active()) { |
791e7c82 LC |
377 | info->has_disk = true; |
378 | info->disk = g_malloc0(sizeof(*info->disk)); | |
379 | info->disk->transferred = blk_mig_bytes_transferred(); | |
380 | info->disk->remaining = blk_mig_bytes_remaining(); | |
381 | info->disk->total = blk_mig_bytes_total(); | |
ff8d81d8 | 382 | } |
f36d55af OW |
383 | |
384 | get_xbzrle_cache_stats(info); | |
17549e84 | 385 | break; |
31194731 | 386 | case MIGRATION_STATUS_COMPLETED: |
f36d55af OW |
387 | get_xbzrle_cache_stats(info); |
388 | ||
791e7c82 | 389 | info->has_status = true; |
00c14997 | 390 | info->has_total_time = true; |
7aa939af | 391 | info->total_time = s->total_time; |
9c5a9fcf JQ |
392 | info->has_downtime = true; |
393 | info->downtime = s->downtime; | |
ed4fbd10 MH |
394 | info->has_setup_time = true; |
395 | info->setup_time = s->setup_time; | |
d5f8a570 JQ |
396 | |
397 | info->has_ram = true; | |
398 | info->ram = g_malloc0(sizeof(*info->ram)); | |
399 | info->ram->transferred = ram_bytes_transferred(); | |
400 | info->ram->remaining = 0; | |
401 | info->ram->total = ram_bytes_total(); | |
004d4c10 | 402 | info->ram->duplicate = dup_mig_pages_transferred(); |
f1c72795 | 403 | info->ram->skipped = skipped_mig_pages_transferred(); |
004d4c10 OW |
404 | info->ram->normal = norm_mig_pages_transferred(); |
405 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
7e114f8c | 406 | info->ram->mbps = s->mbps; |
58570ed8 | 407 | info->ram->dirty_sync_count = s->dirty_sync_count; |
17549e84 | 408 | break; |
31194731 | 409 | case MIGRATION_STATUS_FAILED: |
791e7c82 | 410 | info->has_status = true; |
17549e84 | 411 | break; |
31194731 | 412 | case MIGRATION_STATUS_CANCELLED: |
791e7c82 | 413 | info->has_status = true; |
17549e84 | 414 | break; |
5bb7910a | 415 | } |
cde63fbe | 416 | info->status = s->state; |
791e7c82 LC |
417 | |
418 | return info; | |
5bb7910a AL |
419 | } |
420 | ||
00458433 OW |
421 | void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, |
422 | Error **errp) | |
423 | { | |
424 | MigrationState *s = migrate_get_current(); | |
425 | MigrationCapabilityStatusList *cap; | |
426 | ||
31194731 HZ |
427 | if (s->state == MIGRATION_STATUS_ACTIVE || |
428 | s->state == MIGRATION_STATUS_SETUP) { | |
c6bd8c70 | 429 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
00458433 OW |
430 | return; |
431 | } | |
432 | ||
433 | for (cap = params; cap; cap = cap->next) { | |
434 | s->enabled_capabilities[cap->value->capability] = cap->value->state; | |
435 | } | |
436 | } | |
437 | ||
85de8323 LL |
438 | void qmp_migrate_set_parameters(bool has_compress_level, |
439 | int64_t compress_level, | |
440 | bool has_compress_threads, | |
441 | int64_t compress_threads, | |
442 | bool has_decompress_threads, | |
443 | int64_t decompress_threads, Error **errp) | |
444 | { | |
445 | MigrationState *s = migrate_get_current(); | |
446 | ||
447 | if (has_compress_level && (compress_level < 0 || compress_level > 9)) { | |
c6bd8c70 MA |
448 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level", |
449 | "is invalid, it should be in the range of 0 to 9"); | |
85de8323 LL |
450 | return; |
451 | } | |
452 | if (has_compress_threads && | |
453 | (compress_threads < 1 || compress_threads > 255)) { | |
c6bd8c70 MA |
454 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
455 | "compress_threads", | |
456 | "is invalid, it should be in the range of 1 to 255"); | |
85de8323 LL |
457 | return; |
458 | } | |
459 | if (has_decompress_threads && | |
460 | (decompress_threads < 1 || decompress_threads > 255)) { | |
c6bd8c70 MA |
461 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
462 | "decompress_threads", | |
463 | "is invalid, it should be in the range of 1 to 255"); | |
85de8323 LL |
464 | return; |
465 | } | |
466 | ||
467 | if (has_compress_level) { | |
468 | s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = compress_level; | |
469 | } | |
470 | if (has_compress_threads) { | |
471 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = compress_threads; | |
472 | } | |
473 | if (has_decompress_threads) { | |
474 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = | |
475 | decompress_threads; | |
476 | } | |
477 | } | |
478 | ||
065e2813 AL |
479 | /* shared migration helpers */ |
480 | ||
51cf4c1a Z |
481 | static void migrate_set_state(MigrationState *s, int old_state, int new_state) |
482 | { | |
483 | if (atomic_cmpxchg(&s->state, old_state, new_state) == new_state) { | |
484 | trace_migrate_set_state(new_state); | |
485 | } | |
486 | } | |
487 | ||
bb1fadc4 | 488 | static void migrate_fd_cleanup(void *opaque) |
065e2813 | 489 | { |
bb1fadc4 PB |
490 | MigrationState *s = opaque; |
491 | ||
492 | qemu_bh_delete(s->cleanup_bh); | |
493 | s->cleanup_bh = NULL; | |
494 | ||
065e2813 | 495 | if (s->file) { |
9013dca5 | 496 | trace_migrate_fd_cleanup(); |
404a7c05 PB |
497 | qemu_mutex_unlock_iothread(); |
498 | qemu_thread_join(&s->thread); | |
499 | qemu_mutex_lock_iothread(); | |
500 | ||
8706d2d5 | 501 | migrate_compress_threads_join(); |
6f190a06 PB |
502 | qemu_fclose(s->file); |
503 | s->file = NULL; | |
065e2813 AL |
504 | } |
505 | ||
31194731 | 506 | assert(s->state != MIGRATION_STATUS_ACTIVE); |
7a2c1721 | 507 | |
31194731 | 508 | if (s->state != MIGRATION_STATUS_COMPLETED) { |
7a2c1721 | 509 | qemu_savevm_state_cancel(); |
31194731 HZ |
510 | if (s->state == MIGRATION_STATUS_CANCELLING) { |
511 | migrate_set_state(s, MIGRATION_STATUS_CANCELLING, | |
512 | MIGRATION_STATUS_CANCELLED); | |
51cf4c1a | 513 | } |
7a2c1721 | 514 | } |
a3fa1d78 PB |
515 | |
516 | notifier_list_notify(&migration_state_notifiers, s); | |
065e2813 AL |
517 | } |
518 | ||
8b6b99b3 | 519 | void migrate_fd_error(MigrationState *s) |
065e2813 | 520 | { |
9013dca5 | 521 | trace_migrate_fd_error(); |
bb1fadc4 | 522 | assert(s->file == NULL); |
31194731 HZ |
523 | s->state = MIGRATION_STATUS_FAILED; |
524 | trace_migrate_set_state(MIGRATION_STATUS_FAILED); | |
bb1fadc4 | 525 | notifier_list_notify(&migration_state_notifiers, s); |
458cf28e JQ |
526 | } |
527 | ||
0edda1c4 | 528 | static void migrate_fd_cancel(MigrationState *s) |
065e2813 | 529 | { |
6f2b811a | 530 | int old_state ; |
a26ba26e | 531 | QEMUFile *f = migrate_get_current()->file; |
9013dca5 | 532 | trace_migrate_fd_cancel(); |
065e2813 | 533 | |
6f2b811a Z |
534 | do { |
535 | old_state = s->state; | |
31194731 HZ |
536 | if (old_state != MIGRATION_STATUS_SETUP && |
537 | old_state != MIGRATION_STATUS_ACTIVE) { | |
6f2b811a Z |
538 | break; |
539 | } | |
31194731 HZ |
540 | migrate_set_state(s, old_state, MIGRATION_STATUS_CANCELLING); |
541 | } while (s->state != MIGRATION_STATUS_CANCELLING); | |
a26ba26e DDAG |
542 | |
543 | /* | |
544 | * If we're unlucky the migration code might be stuck somewhere in a | |
545 | * send/write while the network has failed and is waiting to timeout; | |
546 | * if we've got shutdown(2) available then we can force it to quit. | |
547 | * The outgoing qemu file gets closed in migrate_fd_cleanup that is | |
548 | * called in a bh, so there is no race against this cancel. | |
549 | */ | |
31194731 | 550 | if (s->state == MIGRATION_STATUS_CANCELLING && f) { |
a26ba26e DDAG |
551 | qemu_file_shutdown(f); |
552 | } | |
065e2813 AL |
553 | } |
554 | ||
99a0db9b GH |
555 | void add_migration_state_change_notifier(Notifier *notify) |
556 | { | |
557 | notifier_list_add(&migration_state_notifiers, notify); | |
558 | } | |
559 | ||
560 | void remove_migration_state_change_notifier(Notifier *notify) | |
561 | { | |
31552529 | 562 | notifier_remove(notify); |
99a0db9b GH |
563 | } |
564 | ||
02edd2e7 | 565 | bool migration_in_setup(MigrationState *s) |
afe2df69 | 566 | { |
31194731 | 567 | return s->state == MIGRATION_STATUS_SETUP; |
afe2df69 GH |
568 | } |
569 | ||
7073693b | 570 | bool migration_has_finished(MigrationState *s) |
99a0db9b | 571 | { |
31194731 | 572 | return s->state == MIGRATION_STATUS_COMPLETED; |
99a0db9b | 573 | } |
0edda1c4 | 574 | |
afe2df69 GH |
575 | bool migration_has_failed(MigrationState *s) |
576 | { | |
31194731 HZ |
577 | return (s->state == MIGRATION_STATUS_CANCELLED || |
578 | s->state == MIGRATION_STATUS_FAILED); | |
afe2df69 GH |
579 | } |
580 | ||
6607ae23 | 581 | static MigrationState *migrate_init(const MigrationParams *params) |
0edda1c4 | 582 | { |
17549e84 | 583 | MigrationState *s = migrate_get_current(); |
d0ae46c1 | 584 | int64_t bandwidth_limit = s->bandwidth_limit; |
bbf6da32 | 585 | bool enabled_capabilities[MIGRATION_CAPABILITY_MAX]; |
17ad9b35 | 586 | int64_t xbzrle_cache_size = s->xbzrle_cache_size; |
43c60a81 LL |
587 | int compress_level = s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; |
588 | int compress_thread_count = | |
589 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; | |
590 | int decompress_thread_count = | |
591 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; | |
bbf6da32 OW |
592 | |
593 | memcpy(enabled_capabilities, s->enabled_capabilities, | |
594 | sizeof(enabled_capabilities)); | |
0edda1c4 | 595 | |
17549e84 | 596 | memset(s, 0, sizeof(*s)); |
6607ae23 | 597 | s->params = *params; |
bbf6da32 OW |
598 | memcpy(s->enabled_capabilities, enabled_capabilities, |
599 | sizeof(enabled_capabilities)); | |
17ad9b35 | 600 | s->xbzrle_cache_size = xbzrle_cache_size; |
1299c631 | 601 | |
43c60a81 LL |
602 | s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = compress_level; |
603 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = | |
604 | compress_thread_count; | |
605 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = | |
606 | decompress_thread_count; | |
0edda1c4 | 607 | s->bandwidth_limit = bandwidth_limit; |
31194731 HZ |
608 | s->state = MIGRATION_STATUS_SETUP; |
609 | trace_migrate_set_state(MIGRATION_STATUS_SETUP); | |
0edda1c4 | 610 | |
bc72ad67 | 611 | s->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0edda1c4 JQ |
612 | return s; |
613 | } | |
cab30143 | 614 | |
fa2756b7 AL |
615 | static GSList *migration_blockers; |
616 | ||
617 | void migrate_add_blocker(Error *reason) | |
618 | { | |
619 | migration_blockers = g_slist_prepend(migration_blockers, reason); | |
620 | } | |
621 | ||
622 | void migrate_del_blocker(Error *reason) | |
623 | { | |
624 | migration_blockers = g_slist_remove(migration_blockers, reason); | |
625 | } | |
626 | ||
bf1ae1f4 DDAG |
627 | void qmp_migrate_incoming(const char *uri, Error **errp) |
628 | { | |
629 | Error *local_err = NULL; | |
4debb5f5 | 630 | static bool once = true; |
bf1ae1f4 DDAG |
631 | |
632 | if (!deferred_incoming) { | |
4debb5f5 | 633 | error_setg(errp, "For use with '-incoming defer'"); |
bf1ae1f4 DDAG |
634 | return; |
635 | } | |
4debb5f5 DDAG |
636 | if (!once) { |
637 | error_setg(errp, "The incoming migration has already been started"); | |
638 | } | |
bf1ae1f4 DDAG |
639 | |
640 | qemu_start_incoming_migration(uri, &local_err); | |
641 | ||
642 | if (local_err) { | |
643 | error_propagate(errp, local_err); | |
644 | return; | |
645 | } | |
646 | ||
4debb5f5 | 647 | once = false; |
bf1ae1f4 DDAG |
648 | } |
649 | ||
e1c37d0e LC |
650 | void qmp_migrate(const char *uri, bool has_blk, bool blk, |
651 | bool has_inc, bool inc, bool has_detach, bool detach, | |
652 | Error **errp) | |
cab30143 | 653 | { |
be7059cd | 654 | Error *local_err = NULL; |
17549e84 | 655 | MigrationState *s = migrate_get_current(); |
6607ae23 | 656 | MigrationParams params; |
cab30143 | 657 | const char *p; |
cab30143 | 658 | |
8c0426ae PP |
659 | params.blk = has_blk && blk; |
660 | params.shared = has_inc && inc; | |
6607ae23 | 661 | |
31194731 HZ |
662 | if (s->state == MIGRATION_STATUS_ACTIVE || |
663 | s->state == MIGRATION_STATUS_SETUP || | |
664 | s->state == MIGRATION_STATUS_CANCELLING) { | |
c6bd8c70 | 665 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
e1c37d0e | 666 | return; |
cab30143 JQ |
667 | } |
668 | ||
ca99993a DDAG |
669 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
670 | error_setg(errp, "Guest is waiting for an incoming migration"); | |
671 | return; | |
672 | } | |
673 | ||
e1c37d0e LC |
674 | if (qemu_savevm_state_blocked(errp)) { |
675 | return; | |
cab30143 JQ |
676 | } |
677 | ||
fa2756b7 | 678 | if (migration_blockers) { |
e1c37d0e LC |
679 | *errp = error_copy(migration_blockers->data); |
680 | return; | |
fa2756b7 AL |
681 | } |
682 | ||
6607ae23 | 683 | s = migrate_init(¶ms); |
cab30143 JQ |
684 | |
685 | if (strstart(uri, "tcp:", &p)) { | |
f37afb5a | 686 | tcp_start_outgoing_migration(s, p, &local_err); |
2da776db | 687 | #ifdef CONFIG_RDMA |
41310c68 | 688 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
689 | rdma_start_outgoing_migration(s, p, &local_err); |
690 | #endif | |
cab30143 JQ |
691 | #if !defined(WIN32) |
692 | } else if (strstart(uri, "exec:", &p)) { | |
f37afb5a | 693 | exec_start_outgoing_migration(s, p, &local_err); |
cab30143 | 694 | } else if (strstart(uri, "unix:", &p)) { |
f37afb5a | 695 | unix_start_outgoing_migration(s, p, &local_err); |
cab30143 | 696 | } else if (strstart(uri, "fd:", &p)) { |
f37afb5a | 697 | fd_start_outgoing_migration(s, p, &local_err); |
cab30143 | 698 | #endif |
99a0db9b | 699 | } else { |
c6bd8c70 MA |
700 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "uri", |
701 | "a valid migration protocol"); | |
31194731 | 702 | s->state = MIGRATION_STATUS_FAILED; |
e1c37d0e | 703 | return; |
cab30143 JQ |
704 | } |
705 | ||
f37afb5a | 706 | if (local_err) { |
342ab8d1 | 707 | migrate_fd_error(s); |
f37afb5a | 708 | error_propagate(errp, local_err); |
e1c37d0e | 709 | return; |
1299c631 | 710 | } |
cab30143 JQ |
711 | } |
712 | ||
6cdedb07 | 713 | void qmp_migrate_cancel(Error **errp) |
cab30143 | 714 | { |
17549e84 | 715 | migrate_fd_cancel(migrate_get_current()); |
cab30143 JQ |
716 | } |
717 | ||
9e1ba4cc OW |
718 | void qmp_migrate_set_cache_size(int64_t value, Error **errp) |
719 | { | |
720 | MigrationState *s = migrate_get_current(); | |
c91e681a | 721 | int64_t new_size; |
9e1ba4cc OW |
722 | |
723 | /* Check for truncation */ | |
724 | if (value != (size_t)value) { | |
c6bd8c70 MA |
725 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
726 | "exceeding address space"); | |
9e1ba4cc OW |
727 | return; |
728 | } | |
729 | ||
a5615b14 OW |
730 | /* Cache should not be larger than guest ram size */ |
731 | if (value > ram_bytes_total()) { | |
c6bd8c70 MA |
732 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
733 | "exceeds guest ram size "); | |
a5615b14 OW |
734 | return; |
735 | } | |
736 | ||
c91e681a OW |
737 | new_size = xbzrle_cache_resize(value); |
738 | if (new_size < 0) { | |
c6bd8c70 MA |
739 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
740 | "is smaller than page size"); | |
c91e681a OW |
741 | return; |
742 | } | |
743 | ||
744 | s->xbzrle_cache_size = new_size; | |
9e1ba4cc OW |
745 | } |
746 | ||
747 | int64_t qmp_query_migrate_cache_size(Error **errp) | |
748 | { | |
749 | return migrate_xbzrle_cache_size(); | |
750 | } | |
751 | ||
3dc85383 | 752 | void qmp_migrate_set_speed(int64_t value, Error **errp) |
cab30143 | 753 | { |
cab30143 JQ |
754 | MigrationState *s; |
755 | ||
3dc85383 LC |
756 | if (value < 0) { |
757 | value = 0; | |
99a0db9b | 758 | } |
442773ce PB |
759 | if (value > SIZE_MAX) { |
760 | value = SIZE_MAX; | |
761 | } | |
cab30143 | 762 | |
17549e84 | 763 | s = migrate_get_current(); |
3dc85383 | 764 | s->bandwidth_limit = value; |
442773ce PB |
765 | if (s->file) { |
766 | qemu_file_set_rate_limit(s->file, s->bandwidth_limit / XFER_LIMIT_RATIO); | |
767 | } | |
cab30143 JQ |
768 | } |
769 | ||
4f0a993b | 770 | void qmp_migrate_set_downtime(double value, Error **errp) |
cab30143 | 771 | { |
4f0a993b LC |
772 | value *= 1e9; |
773 | value = MAX(0, MIN(UINT64_MAX, value)); | |
774 | max_downtime = (uint64_t)value; | |
99a0db9b | 775 | } |
17ad9b35 | 776 | |
bde1e2ec CV |
777 | bool migrate_auto_converge(void) |
778 | { | |
779 | MigrationState *s; | |
780 | ||
781 | s = migrate_get_current(); | |
782 | ||
783 | return s->enabled_capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; | |
784 | } | |
785 | ||
323004a3 PL |
786 | bool migrate_zero_blocks(void) |
787 | { | |
788 | MigrationState *s; | |
789 | ||
790 | s = migrate_get_current(); | |
791 | ||
792 | return s->enabled_capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS]; | |
793 | } | |
794 | ||
8706d2d5 LL |
795 | bool migrate_use_compression(void) |
796 | { | |
dde4e694 LL |
797 | MigrationState *s; |
798 | ||
799 | s = migrate_get_current(); | |
800 | ||
801 | return s->enabled_capabilities[MIGRATION_CAPABILITY_COMPRESS]; | |
8706d2d5 LL |
802 | } |
803 | ||
804 | int migrate_compress_level(void) | |
805 | { | |
806 | MigrationState *s; | |
807 | ||
808 | s = migrate_get_current(); | |
809 | ||
43c60a81 | 810 | return s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; |
8706d2d5 LL |
811 | } |
812 | ||
813 | int migrate_compress_threads(void) | |
814 | { | |
815 | MigrationState *s; | |
816 | ||
817 | s = migrate_get_current(); | |
818 | ||
43c60a81 | 819 | return s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; |
8706d2d5 LL |
820 | } |
821 | ||
3fcb38c2 LL |
822 | int migrate_decompress_threads(void) |
823 | { | |
824 | MigrationState *s; | |
825 | ||
826 | s = migrate_get_current(); | |
827 | ||
43c60a81 | 828 | return s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; |
3fcb38c2 LL |
829 | } |
830 | ||
17ad9b35 OW |
831 | int migrate_use_xbzrle(void) |
832 | { | |
833 | MigrationState *s; | |
834 | ||
835 | s = migrate_get_current(); | |
836 | ||
837 | return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE]; | |
838 | } | |
839 | ||
840 | int64_t migrate_xbzrle_cache_size(void) | |
841 | { | |
842 | MigrationState *s; | |
843 | ||
844 | s = migrate_get_current(); | |
845 | ||
846 | return s->xbzrle_cache_size; | |
847 | } | |
0d82d0e8 JQ |
848 | |
849 | /* migration thread support */ | |
850 | ||
5f496a1b | 851 | static void *migration_thread(void *opaque) |
0d82d0e8 | 852 | { |
9848a404 | 853 | MigrationState *s = opaque; |
bc72ad67 AB |
854 | int64_t initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
855 | int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST); | |
be7172e2 | 856 | int64_t initial_bytes = 0; |
0d82d0e8 | 857 | int64_t max_size = 0; |
a3fa1d78 PB |
858 | int64_t start_time = initial_time; |
859 | bool old_vm_running = false; | |
76f5933a | 860 | |
f796baa1 | 861 | qemu_savevm_state_header(s->file); |
dba433c0 | 862 | qemu_savevm_state_begin(s->file, &s->params); |
0d82d0e8 | 863 | |
bc72ad67 | 864 | s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start; |
31194731 | 865 | migrate_set_state(s, MIGRATION_STATUS_SETUP, MIGRATION_STATUS_ACTIVE); |
29ae8a41 | 866 | |
31194731 | 867 | while (s->state == MIGRATION_STATUS_ACTIVE) { |
a3e879cd | 868 | int64_t current_time; |
c369f40d | 869 | uint64_t pending_size; |
0d82d0e8 | 870 | |
a0ff044b | 871 | if (!qemu_file_rate_limit(s->file)) { |
c369f40d | 872 | pending_size = qemu_savevm_state_pending(s->file, max_size); |
9013dca5 | 873 | trace_migrate_pending(pending_size, max_size); |
b22ff1fb | 874 | if (pending_size && pending_size >= max_size) { |
dba433c0 | 875 | qemu_savevm_state_iterate(s->file); |
c369f40d | 876 | } else { |
0e1146a7 KW |
877 | int ret; |
878 | ||
32c835ba | 879 | qemu_mutex_lock_iothread(); |
bc72ad67 | 880 | start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
c369f40d | 881 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER); |
a3fa1d78 | 882 | old_vm_running = runstate_is_running(); |
0e1146a7 | 883 | |
df4b1024 JQ |
884 | ret = global_state_store(); |
885 | if (!ret) { | |
886 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); | |
887 | if (ret >= 0) { | |
888 | qemu_file_set_rate_limit(s->file, INT64_MAX); | |
889 | qemu_savevm_state_complete(s->file); | |
890 | } | |
0e1146a7 | 891 | } |
32c835ba | 892 | qemu_mutex_unlock_iothread(); |
0e1146a7 KW |
893 | |
894 | if (ret < 0) { | |
31194731 HZ |
895 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
896 | MIGRATION_STATUS_FAILED); | |
0e1146a7 KW |
897 | break; |
898 | } | |
899 | ||
059f896c | 900 | if (!qemu_file_get_error(s->file)) { |
31194731 HZ |
901 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
902 | MIGRATION_STATUS_COMPLETED); | |
059f896c PB |
903 | break; |
904 | } | |
c369f40d JQ |
905 | } |
906 | } | |
f4410a5d | 907 | |
fd45ee2c | 908 | if (qemu_file_get_error(s->file)) { |
31194731 HZ |
909 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
910 | MIGRATION_STATUS_FAILED); | |
fd45ee2c PB |
911 | break; |
912 | } | |
bc72ad67 | 913 | current_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0d82d0e8 | 914 | if (current_time >= initial_time + BUFFER_DELAY) { |
be7172e2 | 915 | uint64_t transferred_bytes = qemu_ftell(s->file) - initial_bytes; |
77417f10 | 916 | uint64_t time_spent = current_time - initial_time; |
0d82d0e8 JQ |
917 | double bandwidth = transferred_bytes / time_spent; |
918 | max_size = bandwidth * migrate_max_downtime() / 1000000; | |
919 | ||
7e114f8c MH |
920 | s->mbps = time_spent ? (((double) transferred_bytes * 8.0) / |
921 | ((double) time_spent / 1000.0)) / 1000.0 / 1000.0 : -1; | |
922 | ||
9013dca5 AK |
923 | trace_migrate_transferred(transferred_bytes, time_spent, |
924 | bandwidth, max_size); | |
90f8ae72 JQ |
925 | /* if we haven't sent anything, we don't want to recalculate |
926 | 10000 is a small enough number for our purposes */ | |
927 | if (s->dirty_bytes_rate && transferred_bytes > 10000) { | |
928 | s->expected_downtime = s->dirty_bytes_rate / bandwidth; | |
929 | } | |
0d82d0e8 | 930 | |
1964a397 | 931 | qemu_file_reset_rate_limit(s->file); |
0d82d0e8 | 932 | initial_time = current_time; |
be7172e2 | 933 | initial_bytes = qemu_ftell(s->file); |
0d82d0e8 | 934 | } |
a0ff044b | 935 | if (qemu_file_rate_limit(s->file)) { |
0d82d0e8 JQ |
936 | /* usleep expects microseconds */ |
937 | g_usleep((initial_time + BUFFER_DELAY - current_time)*1000); | |
938 | } | |
a3fa1d78 PB |
939 | } |
940 | ||
f4410a5d | 941 | qemu_mutex_lock_iothread(); |
31194731 | 942 | if (s->state == MIGRATION_STATUS_COMPLETED) { |
bc72ad67 | 943 | int64_t end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
d6ed7312 | 944 | uint64_t transferred_bytes = qemu_ftell(s->file); |
a3fa1d78 PB |
945 | s->total_time = end_time - s->total_time; |
946 | s->downtime = end_time - start_time; | |
d6ed7312 PL |
947 | if (s->total_time) { |
948 | s->mbps = (((double) transferred_bytes * 8.0) / | |
949 | ((double) s->total_time)) / 1000; | |
950 | } | |
a3fa1d78 PB |
951 | runstate_set(RUN_STATE_POSTMIGRATE); |
952 | } else { | |
953 | if (old_vm_running) { | |
a3fa1d78 | 954 | vm_start(); |
dba433c0 | 955 | } |
0d82d0e8 | 956 | } |
bb1fadc4 | 957 | qemu_bh_schedule(s->cleanup_bh); |
dba433c0 | 958 | qemu_mutex_unlock_iothread(); |
f4410a5d | 959 | |
0d82d0e8 JQ |
960 | return NULL; |
961 | } | |
962 | ||
9848a404 | 963 | void migrate_fd_connect(MigrationState *s) |
0d82d0e8 | 964 | { |
cc283e3b JQ |
965 | /* This is a best 1st approximation. ns to ms */ |
966 | s->expected_downtime = max_downtime/1000000; | |
bb1fadc4 | 967 | s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s); |
0d82d0e8 | 968 | |
442773ce PB |
969 | qemu_file_set_rate_limit(s->file, |
970 | s->bandwidth_limit / XFER_LIMIT_RATIO); | |
971 | ||
9287ac27 SH |
972 | /* Notify before starting migration thread */ |
973 | notifier_list_notify(&migration_state_notifiers, s); | |
974 | ||
8706d2d5 | 975 | migrate_compress_threads_create(); |
4900116e | 976 | qemu_thread_create(&s->thread, "migration", migration_thread, s, |
bb1fadc4 | 977 | QEMU_THREAD_JOINABLE); |
0d82d0e8 | 978 | } |