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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 { | |
13d16814 | 103 | bool optional; |
df4b1024 JQ |
104 | uint32_t size; |
105 | uint8_t runstate[100]; | |
106 | } GlobalState; | |
107 | ||
108 | static GlobalState global_state; | |
109 | ||
110 | static int global_state_store(void) | |
111 | { | |
112 | if (!runstate_store((char *)global_state.runstate, | |
113 | sizeof(global_state.runstate))) { | |
114 | error_report("runstate name too big: %s", global_state.runstate); | |
115 | trace_migrate_state_too_big(); | |
116 | return -EINVAL; | |
117 | } | |
118 | return 0; | |
119 | } | |
120 | ||
121 | static char *global_state_get_runstate(void) | |
122 | { | |
123 | return (char *)global_state.runstate; | |
124 | } | |
125 | ||
13d16814 JQ |
126 | void global_state_set_optional(void) |
127 | { | |
128 | global_state.optional = true; | |
129 | } | |
130 | ||
131 | static bool global_state_needed(void *opaque) | |
132 | { | |
133 | GlobalState *s = opaque; | |
134 | char *runstate = (char *)s->runstate; | |
135 | ||
136 | /* If it is not optional, it is mandatory */ | |
137 | ||
138 | if (s->optional == false) { | |
139 | return true; | |
140 | } | |
141 | ||
142 | /* If state is running or paused, it is not needed */ | |
143 | ||
144 | if (strcmp(runstate, "running") == 0 || | |
145 | strcmp(runstate, "paused") == 0) { | |
146 | return false; | |
147 | } | |
148 | ||
149 | /* for any other state it is needed */ | |
150 | return true; | |
151 | } | |
152 | ||
df4b1024 JQ |
153 | static int global_state_post_load(void *opaque, int version_id) |
154 | { | |
155 | GlobalState *s = opaque; | |
156 | int ret = 0; | |
157 | char *runstate = (char *)s->runstate; | |
158 | ||
159 | trace_migrate_global_state_post_load(runstate); | |
160 | ||
161 | if (strcmp(runstate, "running") != 0) { | |
162 | Error *local_err = NULL; | |
163 | int r = qapi_enum_parse(RunState_lookup, runstate, RUN_STATE_MAX, | |
164 | -1, &local_err); | |
165 | ||
166 | if (r == -1) { | |
167 | if (local_err) { | |
168 | error_report_err(local_err); | |
169 | } | |
170 | return -EINVAL; | |
171 | } | |
172 | ret = vm_stop_force_state(r); | |
173 | } | |
174 | ||
175 | return ret; | |
176 | } | |
177 | ||
178 | static void global_state_pre_save(void *opaque) | |
179 | { | |
180 | GlobalState *s = opaque; | |
181 | ||
182 | trace_migrate_global_state_pre_save((char *)s->runstate); | |
183 | s->size = strlen((char *)s->runstate) + 1; | |
184 | } | |
185 | ||
186 | static const VMStateDescription vmstate_globalstate = { | |
187 | .name = "globalstate", | |
188 | .version_id = 1, | |
189 | .minimum_version_id = 1, | |
190 | .post_load = global_state_post_load, | |
191 | .pre_save = global_state_pre_save, | |
13d16814 | 192 | .needed = global_state_needed, |
df4b1024 JQ |
193 | .fields = (VMStateField[]) { |
194 | VMSTATE_UINT32(size, GlobalState), | |
195 | VMSTATE_BUFFER(runstate, GlobalState), | |
196 | VMSTATE_END_OF_LIST() | |
197 | }, | |
198 | }; | |
199 | ||
200 | void register_global_state(void) | |
201 | { | |
202 | /* We would use it independently that we receive it */ | |
203 | strcpy((char *)&global_state.runstate, ""); | |
204 | vmstate_register(NULL, 0, &vmstate_globalstate, &global_state); | |
205 | } | |
206 | ||
adde220a DDAG |
207 | /* |
208 | * Called on -incoming with a defer: uri. | |
209 | * The migration can be started later after any parameters have been | |
210 | * changed. | |
211 | */ | |
212 | static void deferred_incoming_migration(Error **errp) | |
213 | { | |
214 | if (deferred_incoming) { | |
215 | error_setg(errp, "Incoming migration already deferred"); | |
216 | } | |
217 | deferred_incoming = true; | |
218 | } | |
219 | ||
43eaae28 | 220 | void qemu_start_incoming_migration(const char *uri, Error **errp) |
5bb7910a | 221 | { |
34c9dd8e AL |
222 | const char *p; |
223 | ||
adde220a DDAG |
224 | if (!strcmp(uri, "defer")) { |
225 | deferred_incoming_migration(errp); | |
226 | } else if (strstart(uri, "tcp:", &p)) { | |
43eaae28 | 227 | tcp_start_incoming_migration(p, errp); |
2da776db | 228 | #ifdef CONFIG_RDMA |
adde220a | 229 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
230 | rdma_start_incoming_migration(p, errp); |
231 | #endif | |
065e2813 | 232 | #if !defined(WIN32) |
adde220a | 233 | } else if (strstart(uri, "exec:", &p)) { |
43eaae28 | 234 | exec_start_incoming_migration(p, errp); |
adde220a | 235 | } else if (strstart(uri, "unix:", &p)) { |
43eaae28 | 236 | unix_start_incoming_migration(p, errp); |
adde220a | 237 | } else if (strstart(uri, "fd:", &p)) { |
43eaae28 | 238 | fd_start_incoming_migration(p, errp); |
065e2813 | 239 | #endif |
adde220a | 240 | } else { |
312fd5f2 | 241 | error_setg(errp, "unknown migration protocol: %s", uri); |
8ca5e801 | 242 | } |
5bb7910a AL |
243 | } |
244 | ||
82a4da79 | 245 | static void process_incoming_migration_co(void *opaque) |
511c0231 | 246 | { |
82a4da79 | 247 | QEMUFile *f = opaque; |
5a8a30db | 248 | Error *local_err = NULL; |
1c12e1f5 PB |
249 | int ret; |
250 | ||
bca7856a DDAG |
251 | migration_incoming_state_new(f); |
252 | ||
1c12e1f5 | 253 | ret = qemu_loadvm_state(f); |
bca7856a | 254 | |
1c12e1f5 | 255 | qemu_fclose(f); |
905f26f2 | 256 | free_xbzrle_decoded_buf(); |
bca7856a DDAG |
257 | migration_incoming_state_destroy(); |
258 | ||
1c12e1f5 | 259 | if (ret < 0) { |
db80face | 260 | error_report("load of migration failed: %s", strerror(-ret)); |
3fcb38c2 | 261 | migrate_decompress_threads_join(); |
4aead692 | 262 | exit(EXIT_FAILURE); |
511c0231 JQ |
263 | } |
264 | qemu_announce_self(); | |
511c0231 | 265 | |
0f15423c | 266 | /* Make sure all file formats flush their mutable metadata */ |
5a8a30db KW |
267 | bdrv_invalidate_cache_all(&local_err); |
268 | if (local_err) { | |
97baf9d9 | 269 | error_report_err(local_err); |
3fcb38c2 | 270 | migrate_decompress_threads_join(); |
5a8a30db KW |
271 | exit(EXIT_FAILURE); |
272 | } | |
0f15423c | 273 | |
df4b1024 JQ |
274 | /* runstate == "" means that we haven't received it through the |
275 | * wire, so we obey autostart. runstate == runing means that we | |
276 | * need to run it, we need to make sure that we do it after | |
277 | * everything else has finished. Every other state change is done | |
278 | * at the post_load function */ | |
279 | ||
280 | if (strcmp(global_state_get_runstate(), "running") == 0) { | |
511c0231 | 281 | vm_start(); |
df4b1024 JQ |
282 | } else if (strcmp(global_state_get_runstate(), "") == 0) { |
283 | if (autostart) { | |
284 | vm_start(); | |
285 | } else { | |
286 | runstate_set(RUN_STATE_PAUSED); | |
287 | } | |
f5bbfba1 | 288 | } |
3fcb38c2 | 289 | migrate_decompress_threads_join(); |
511c0231 JQ |
290 | } |
291 | ||
82a4da79 PB |
292 | void process_incoming_migration(QEMUFile *f) |
293 | { | |
294 | Coroutine *co = qemu_coroutine_create(process_incoming_migration_co); | |
295 | int fd = qemu_get_fd(f); | |
296 | ||
297 | assert(fd != -1); | |
3fcb38c2 | 298 | migrate_decompress_threads_create(); |
f9e8cacc | 299 | qemu_set_nonblock(fd); |
82a4da79 PB |
300 | qemu_coroutine_enter(co, f); |
301 | } | |
302 | ||
a0a3fd60 GC |
303 | /* amount of nanoseconds we are willing to wait for migration to be down. |
304 | * the choice of nanoseconds is because it is the maximum resolution that | |
305 | * get_clock() can achieve. It is an internal measure. All user-visible | |
306 | * units must be in seconds */ | |
f7cd55a0 | 307 | static uint64_t max_downtime = 300000000; |
a0a3fd60 GC |
308 | |
309 | uint64_t migrate_max_downtime(void) | |
310 | { | |
311 | return max_downtime; | |
312 | } | |
313 | ||
bbf6da32 OW |
314 | MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) |
315 | { | |
316 | MigrationCapabilityStatusList *head = NULL; | |
317 | MigrationCapabilityStatusList *caps; | |
318 | MigrationState *s = migrate_get_current(); | |
319 | int i; | |
320 | ||
387eedeb | 321 | caps = NULL; /* silence compiler warning */ |
bbf6da32 OW |
322 | for (i = 0; i < MIGRATION_CAPABILITY_MAX; i++) { |
323 | if (head == NULL) { | |
324 | head = g_malloc0(sizeof(*caps)); | |
325 | caps = head; | |
326 | } else { | |
327 | caps->next = g_malloc0(sizeof(*caps)); | |
328 | caps = caps->next; | |
329 | } | |
330 | caps->value = | |
331 | g_malloc(sizeof(*caps->value)); | |
332 | caps->value->capability = i; | |
333 | caps->value->state = s->enabled_capabilities[i]; | |
334 | } | |
335 | ||
336 | return head; | |
337 | } | |
338 | ||
85de8323 LL |
339 | MigrationParameters *qmp_query_migrate_parameters(Error **errp) |
340 | { | |
341 | MigrationParameters *params; | |
342 | MigrationState *s = migrate_get_current(); | |
343 | ||
344 | params = g_malloc0(sizeof(*params)); | |
345 | params->compress_level = s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; | |
346 | params->compress_threads = | |
347 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; | |
348 | params->decompress_threads = | |
349 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; | |
350 | ||
351 | return params; | |
352 | } | |
353 | ||
f36d55af OW |
354 | static void get_xbzrle_cache_stats(MigrationInfo *info) |
355 | { | |
356 | if (migrate_use_xbzrle()) { | |
357 | info->has_xbzrle_cache = true; | |
358 | info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache)); | |
359 | info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size(); | |
360 | info->xbzrle_cache->bytes = xbzrle_mig_bytes_transferred(); | |
361 | info->xbzrle_cache->pages = xbzrle_mig_pages_transferred(); | |
362 | info->xbzrle_cache->cache_miss = xbzrle_mig_pages_cache_miss(); | |
8bc39233 | 363 | info->xbzrle_cache->cache_miss_rate = xbzrle_mig_cache_miss_rate(); |
f36d55af OW |
364 | info->xbzrle_cache->overflow = xbzrle_mig_pages_overflow(); |
365 | } | |
366 | } | |
367 | ||
791e7c82 | 368 | MigrationInfo *qmp_query_migrate(Error **errp) |
5bb7910a | 369 | { |
791e7c82 | 370 | MigrationInfo *info = g_malloc0(sizeof(*info)); |
17549e84 JQ |
371 | MigrationState *s = migrate_get_current(); |
372 | ||
373 | switch (s->state) { | |
31194731 | 374 | case MIGRATION_STATUS_NONE: |
17549e84 JQ |
375 | /* no migration has happened ever */ |
376 | break; | |
31194731 | 377 | case MIGRATION_STATUS_SETUP: |
29ae8a41 | 378 | info->has_status = true; |
ed4fbd10 | 379 | info->has_total_time = false; |
29ae8a41 | 380 | break; |
31194731 HZ |
381 | case MIGRATION_STATUS_ACTIVE: |
382 | case MIGRATION_STATUS_CANCELLING: | |
791e7c82 | 383 | info->has_status = true; |
7aa939af | 384 | info->has_total_time = true; |
bc72ad67 | 385 | info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) |
7aa939af | 386 | - s->total_time; |
2c52ddf1 JQ |
387 | info->has_expected_downtime = true; |
388 | info->expected_downtime = s->expected_downtime; | |
ed4fbd10 MH |
389 | info->has_setup_time = true; |
390 | info->setup_time = s->setup_time; | |
17549e84 | 391 | |
791e7c82 LC |
392 | info->has_ram = true; |
393 | info->ram = g_malloc0(sizeof(*info->ram)); | |
394 | info->ram->transferred = ram_bytes_transferred(); | |
395 | info->ram->remaining = ram_bytes_remaining(); | |
396 | info->ram->total = ram_bytes_total(); | |
004d4c10 | 397 | info->ram->duplicate = dup_mig_pages_transferred(); |
f1c72795 | 398 | info->ram->skipped = skipped_mig_pages_transferred(); |
004d4c10 OW |
399 | info->ram->normal = norm_mig_pages_transferred(); |
400 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
8d017193 | 401 | info->ram->dirty_pages_rate = s->dirty_pages_rate; |
7e114f8c | 402 | info->ram->mbps = s->mbps; |
58570ed8 | 403 | info->ram->dirty_sync_count = s->dirty_sync_count; |
8d017193 | 404 | |
17549e84 | 405 | if (blk_mig_active()) { |
791e7c82 LC |
406 | info->has_disk = true; |
407 | info->disk = g_malloc0(sizeof(*info->disk)); | |
408 | info->disk->transferred = blk_mig_bytes_transferred(); | |
409 | info->disk->remaining = blk_mig_bytes_remaining(); | |
410 | info->disk->total = blk_mig_bytes_total(); | |
ff8d81d8 | 411 | } |
f36d55af OW |
412 | |
413 | get_xbzrle_cache_stats(info); | |
17549e84 | 414 | break; |
31194731 | 415 | case MIGRATION_STATUS_COMPLETED: |
f36d55af OW |
416 | get_xbzrle_cache_stats(info); |
417 | ||
791e7c82 | 418 | info->has_status = true; |
00c14997 | 419 | info->has_total_time = true; |
7aa939af | 420 | info->total_time = s->total_time; |
9c5a9fcf JQ |
421 | info->has_downtime = true; |
422 | info->downtime = s->downtime; | |
ed4fbd10 MH |
423 | info->has_setup_time = true; |
424 | info->setup_time = s->setup_time; | |
d5f8a570 JQ |
425 | |
426 | info->has_ram = true; | |
427 | info->ram = g_malloc0(sizeof(*info->ram)); | |
428 | info->ram->transferred = ram_bytes_transferred(); | |
429 | info->ram->remaining = 0; | |
430 | info->ram->total = ram_bytes_total(); | |
004d4c10 | 431 | info->ram->duplicate = dup_mig_pages_transferred(); |
f1c72795 | 432 | info->ram->skipped = skipped_mig_pages_transferred(); |
004d4c10 OW |
433 | info->ram->normal = norm_mig_pages_transferred(); |
434 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
7e114f8c | 435 | info->ram->mbps = s->mbps; |
58570ed8 | 436 | info->ram->dirty_sync_count = s->dirty_sync_count; |
17549e84 | 437 | break; |
31194731 | 438 | case MIGRATION_STATUS_FAILED: |
791e7c82 | 439 | info->has_status = true; |
17549e84 | 440 | break; |
31194731 | 441 | case MIGRATION_STATUS_CANCELLED: |
791e7c82 | 442 | info->has_status = true; |
17549e84 | 443 | break; |
5bb7910a | 444 | } |
cde63fbe | 445 | info->status = s->state; |
791e7c82 LC |
446 | |
447 | return info; | |
5bb7910a AL |
448 | } |
449 | ||
00458433 OW |
450 | void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, |
451 | Error **errp) | |
452 | { | |
453 | MigrationState *s = migrate_get_current(); | |
454 | MigrationCapabilityStatusList *cap; | |
455 | ||
31194731 HZ |
456 | if (s->state == MIGRATION_STATUS_ACTIVE || |
457 | s->state == MIGRATION_STATUS_SETUP) { | |
c6bd8c70 | 458 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
00458433 OW |
459 | return; |
460 | } | |
461 | ||
462 | for (cap = params; cap; cap = cap->next) { | |
463 | s->enabled_capabilities[cap->value->capability] = cap->value->state; | |
464 | } | |
465 | } | |
466 | ||
85de8323 LL |
467 | void qmp_migrate_set_parameters(bool has_compress_level, |
468 | int64_t compress_level, | |
469 | bool has_compress_threads, | |
470 | int64_t compress_threads, | |
471 | bool has_decompress_threads, | |
472 | int64_t decompress_threads, Error **errp) | |
473 | { | |
474 | MigrationState *s = migrate_get_current(); | |
475 | ||
476 | if (has_compress_level && (compress_level < 0 || compress_level > 9)) { | |
c6bd8c70 MA |
477 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level", |
478 | "is invalid, it should be in the range of 0 to 9"); | |
85de8323 LL |
479 | return; |
480 | } | |
481 | if (has_compress_threads && | |
482 | (compress_threads < 1 || compress_threads > 255)) { | |
c6bd8c70 MA |
483 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
484 | "compress_threads", | |
485 | "is invalid, it should be in the range of 1 to 255"); | |
85de8323 LL |
486 | return; |
487 | } | |
488 | if (has_decompress_threads && | |
489 | (decompress_threads < 1 || decompress_threads > 255)) { | |
c6bd8c70 MA |
490 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
491 | "decompress_threads", | |
492 | "is invalid, it should be in the range of 1 to 255"); | |
85de8323 LL |
493 | return; |
494 | } | |
495 | ||
496 | if (has_compress_level) { | |
497 | s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = compress_level; | |
498 | } | |
499 | if (has_compress_threads) { | |
500 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = compress_threads; | |
501 | } | |
502 | if (has_decompress_threads) { | |
503 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = | |
504 | decompress_threads; | |
505 | } | |
506 | } | |
507 | ||
065e2813 AL |
508 | /* shared migration helpers */ |
509 | ||
51cf4c1a Z |
510 | static void migrate_set_state(MigrationState *s, int old_state, int new_state) |
511 | { | |
512 | if (atomic_cmpxchg(&s->state, old_state, new_state) == new_state) { | |
513 | trace_migrate_set_state(new_state); | |
514 | } | |
515 | } | |
516 | ||
bb1fadc4 | 517 | static void migrate_fd_cleanup(void *opaque) |
065e2813 | 518 | { |
bb1fadc4 PB |
519 | MigrationState *s = opaque; |
520 | ||
521 | qemu_bh_delete(s->cleanup_bh); | |
522 | s->cleanup_bh = NULL; | |
523 | ||
065e2813 | 524 | if (s->file) { |
9013dca5 | 525 | trace_migrate_fd_cleanup(); |
404a7c05 PB |
526 | qemu_mutex_unlock_iothread(); |
527 | qemu_thread_join(&s->thread); | |
528 | qemu_mutex_lock_iothread(); | |
529 | ||
8706d2d5 | 530 | migrate_compress_threads_join(); |
6f190a06 PB |
531 | qemu_fclose(s->file); |
532 | s->file = NULL; | |
065e2813 AL |
533 | } |
534 | ||
31194731 | 535 | assert(s->state != MIGRATION_STATUS_ACTIVE); |
7a2c1721 | 536 | |
31194731 | 537 | if (s->state != MIGRATION_STATUS_COMPLETED) { |
7a2c1721 | 538 | qemu_savevm_state_cancel(); |
31194731 HZ |
539 | if (s->state == MIGRATION_STATUS_CANCELLING) { |
540 | migrate_set_state(s, MIGRATION_STATUS_CANCELLING, | |
541 | MIGRATION_STATUS_CANCELLED); | |
51cf4c1a | 542 | } |
7a2c1721 | 543 | } |
a3fa1d78 PB |
544 | |
545 | notifier_list_notify(&migration_state_notifiers, s); | |
065e2813 AL |
546 | } |
547 | ||
8b6b99b3 | 548 | void migrate_fd_error(MigrationState *s) |
065e2813 | 549 | { |
9013dca5 | 550 | trace_migrate_fd_error(); |
bb1fadc4 | 551 | assert(s->file == NULL); |
31194731 HZ |
552 | s->state = MIGRATION_STATUS_FAILED; |
553 | trace_migrate_set_state(MIGRATION_STATUS_FAILED); | |
bb1fadc4 | 554 | notifier_list_notify(&migration_state_notifiers, s); |
458cf28e JQ |
555 | } |
556 | ||
0edda1c4 | 557 | static void migrate_fd_cancel(MigrationState *s) |
065e2813 | 558 | { |
6f2b811a | 559 | int old_state ; |
a26ba26e | 560 | QEMUFile *f = migrate_get_current()->file; |
9013dca5 | 561 | trace_migrate_fd_cancel(); |
065e2813 | 562 | |
6f2b811a Z |
563 | do { |
564 | old_state = s->state; | |
31194731 HZ |
565 | if (old_state != MIGRATION_STATUS_SETUP && |
566 | old_state != MIGRATION_STATUS_ACTIVE) { | |
6f2b811a Z |
567 | break; |
568 | } | |
31194731 HZ |
569 | migrate_set_state(s, old_state, MIGRATION_STATUS_CANCELLING); |
570 | } while (s->state != MIGRATION_STATUS_CANCELLING); | |
a26ba26e DDAG |
571 | |
572 | /* | |
573 | * If we're unlucky the migration code might be stuck somewhere in a | |
574 | * send/write while the network has failed and is waiting to timeout; | |
575 | * if we've got shutdown(2) available then we can force it to quit. | |
576 | * The outgoing qemu file gets closed in migrate_fd_cleanup that is | |
577 | * called in a bh, so there is no race against this cancel. | |
578 | */ | |
31194731 | 579 | if (s->state == MIGRATION_STATUS_CANCELLING && f) { |
a26ba26e DDAG |
580 | qemu_file_shutdown(f); |
581 | } | |
065e2813 AL |
582 | } |
583 | ||
99a0db9b GH |
584 | void add_migration_state_change_notifier(Notifier *notify) |
585 | { | |
586 | notifier_list_add(&migration_state_notifiers, notify); | |
587 | } | |
588 | ||
589 | void remove_migration_state_change_notifier(Notifier *notify) | |
590 | { | |
31552529 | 591 | notifier_remove(notify); |
99a0db9b GH |
592 | } |
593 | ||
02edd2e7 | 594 | bool migration_in_setup(MigrationState *s) |
afe2df69 | 595 | { |
31194731 | 596 | return s->state == MIGRATION_STATUS_SETUP; |
afe2df69 GH |
597 | } |
598 | ||
7073693b | 599 | bool migration_has_finished(MigrationState *s) |
99a0db9b | 600 | { |
31194731 | 601 | return s->state == MIGRATION_STATUS_COMPLETED; |
99a0db9b | 602 | } |
0edda1c4 | 603 | |
afe2df69 GH |
604 | bool migration_has_failed(MigrationState *s) |
605 | { | |
31194731 HZ |
606 | return (s->state == MIGRATION_STATUS_CANCELLED || |
607 | s->state == MIGRATION_STATUS_FAILED); | |
afe2df69 GH |
608 | } |
609 | ||
6607ae23 | 610 | static MigrationState *migrate_init(const MigrationParams *params) |
0edda1c4 | 611 | { |
17549e84 | 612 | MigrationState *s = migrate_get_current(); |
d0ae46c1 | 613 | int64_t bandwidth_limit = s->bandwidth_limit; |
bbf6da32 | 614 | bool enabled_capabilities[MIGRATION_CAPABILITY_MAX]; |
17ad9b35 | 615 | int64_t xbzrle_cache_size = s->xbzrle_cache_size; |
43c60a81 LL |
616 | int compress_level = s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; |
617 | int compress_thread_count = | |
618 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; | |
619 | int decompress_thread_count = | |
620 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; | |
bbf6da32 OW |
621 | |
622 | memcpy(enabled_capabilities, s->enabled_capabilities, | |
623 | sizeof(enabled_capabilities)); | |
0edda1c4 | 624 | |
17549e84 | 625 | memset(s, 0, sizeof(*s)); |
6607ae23 | 626 | s->params = *params; |
bbf6da32 OW |
627 | memcpy(s->enabled_capabilities, enabled_capabilities, |
628 | sizeof(enabled_capabilities)); | |
17ad9b35 | 629 | s->xbzrle_cache_size = xbzrle_cache_size; |
1299c631 | 630 | |
43c60a81 LL |
631 | s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = compress_level; |
632 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = | |
633 | compress_thread_count; | |
634 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = | |
635 | decompress_thread_count; | |
0edda1c4 | 636 | s->bandwidth_limit = bandwidth_limit; |
31194731 HZ |
637 | s->state = MIGRATION_STATUS_SETUP; |
638 | trace_migrate_set_state(MIGRATION_STATUS_SETUP); | |
0edda1c4 | 639 | |
bc72ad67 | 640 | s->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0edda1c4 JQ |
641 | return s; |
642 | } | |
cab30143 | 643 | |
fa2756b7 AL |
644 | static GSList *migration_blockers; |
645 | ||
646 | void migrate_add_blocker(Error *reason) | |
647 | { | |
648 | migration_blockers = g_slist_prepend(migration_blockers, reason); | |
649 | } | |
650 | ||
651 | void migrate_del_blocker(Error *reason) | |
652 | { | |
653 | migration_blockers = g_slist_remove(migration_blockers, reason); | |
654 | } | |
655 | ||
bf1ae1f4 DDAG |
656 | void qmp_migrate_incoming(const char *uri, Error **errp) |
657 | { | |
658 | Error *local_err = NULL; | |
4debb5f5 | 659 | static bool once = true; |
bf1ae1f4 DDAG |
660 | |
661 | if (!deferred_incoming) { | |
4debb5f5 | 662 | error_setg(errp, "For use with '-incoming defer'"); |
bf1ae1f4 DDAG |
663 | return; |
664 | } | |
4debb5f5 DDAG |
665 | if (!once) { |
666 | error_setg(errp, "The incoming migration has already been started"); | |
667 | } | |
bf1ae1f4 DDAG |
668 | |
669 | qemu_start_incoming_migration(uri, &local_err); | |
670 | ||
671 | if (local_err) { | |
672 | error_propagate(errp, local_err); | |
673 | return; | |
674 | } | |
675 | ||
4debb5f5 | 676 | once = false; |
bf1ae1f4 DDAG |
677 | } |
678 | ||
e1c37d0e LC |
679 | void qmp_migrate(const char *uri, bool has_blk, bool blk, |
680 | bool has_inc, bool inc, bool has_detach, bool detach, | |
681 | Error **errp) | |
cab30143 | 682 | { |
be7059cd | 683 | Error *local_err = NULL; |
17549e84 | 684 | MigrationState *s = migrate_get_current(); |
6607ae23 | 685 | MigrationParams params; |
cab30143 | 686 | const char *p; |
cab30143 | 687 | |
8c0426ae PP |
688 | params.blk = has_blk && blk; |
689 | params.shared = has_inc && inc; | |
6607ae23 | 690 | |
31194731 HZ |
691 | if (s->state == MIGRATION_STATUS_ACTIVE || |
692 | s->state == MIGRATION_STATUS_SETUP || | |
693 | s->state == MIGRATION_STATUS_CANCELLING) { | |
c6bd8c70 | 694 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
e1c37d0e | 695 | return; |
cab30143 JQ |
696 | } |
697 | ||
ca99993a DDAG |
698 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
699 | error_setg(errp, "Guest is waiting for an incoming migration"); | |
700 | return; | |
701 | } | |
702 | ||
e1c37d0e LC |
703 | if (qemu_savevm_state_blocked(errp)) { |
704 | return; | |
cab30143 JQ |
705 | } |
706 | ||
fa2756b7 | 707 | if (migration_blockers) { |
e1c37d0e LC |
708 | *errp = error_copy(migration_blockers->data); |
709 | return; | |
fa2756b7 AL |
710 | } |
711 | ||
6607ae23 | 712 | s = migrate_init(¶ms); |
cab30143 JQ |
713 | |
714 | if (strstart(uri, "tcp:", &p)) { | |
f37afb5a | 715 | tcp_start_outgoing_migration(s, p, &local_err); |
2da776db | 716 | #ifdef CONFIG_RDMA |
41310c68 | 717 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
718 | rdma_start_outgoing_migration(s, p, &local_err); |
719 | #endif | |
cab30143 JQ |
720 | #if !defined(WIN32) |
721 | } else if (strstart(uri, "exec:", &p)) { | |
f37afb5a | 722 | exec_start_outgoing_migration(s, p, &local_err); |
cab30143 | 723 | } else if (strstart(uri, "unix:", &p)) { |
f37afb5a | 724 | unix_start_outgoing_migration(s, p, &local_err); |
cab30143 | 725 | } else if (strstart(uri, "fd:", &p)) { |
f37afb5a | 726 | fd_start_outgoing_migration(s, p, &local_err); |
cab30143 | 727 | #endif |
99a0db9b | 728 | } else { |
c6bd8c70 MA |
729 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "uri", |
730 | "a valid migration protocol"); | |
31194731 | 731 | s->state = MIGRATION_STATUS_FAILED; |
e1c37d0e | 732 | return; |
cab30143 JQ |
733 | } |
734 | ||
f37afb5a | 735 | if (local_err) { |
342ab8d1 | 736 | migrate_fd_error(s); |
f37afb5a | 737 | error_propagate(errp, local_err); |
e1c37d0e | 738 | return; |
1299c631 | 739 | } |
cab30143 JQ |
740 | } |
741 | ||
6cdedb07 | 742 | void qmp_migrate_cancel(Error **errp) |
cab30143 | 743 | { |
17549e84 | 744 | migrate_fd_cancel(migrate_get_current()); |
cab30143 JQ |
745 | } |
746 | ||
9e1ba4cc OW |
747 | void qmp_migrate_set_cache_size(int64_t value, Error **errp) |
748 | { | |
749 | MigrationState *s = migrate_get_current(); | |
c91e681a | 750 | int64_t new_size; |
9e1ba4cc OW |
751 | |
752 | /* Check for truncation */ | |
753 | if (value != (size_t)value) { | |
c6bd8c70 MA |
754 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
755 | "exceeding address space"); | |
9e1ba4cc OW |
756 | return; |
757 | } | |
758 | ||
a5615b14 OW |
759 | /* Cache should not be larger than guest ram size */ |
760 | if (value > ram_bytes_total()) { | |
c6bd8c70 MA |
761 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
762 | "exceeds guest ram size "); | |
a5615b14 OW |
763 | return; |
764 | } | |
765 | ||
c91e681a OW |
766 | new_size = xbzrle_cache_resize(value); |
767 | if (new_size < 0) { | |
c6bd8c70 MA |
768 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
769 | "is smaller than page size"); | |
c91e681a OW |
770 | return; |
771 | } | |
772 | ||
773 | s->xbzrle_cache_size = new_size; | |
9e1ba4cc OW |
774 | } |
775 | ||
776 | int64_t qmp_query_migrate_cache_size(Error **errp) | |
777 | { | |
778 | return migrate_xbzrle_cache_size(); | |
779 | } | |
780 | ||
3dc85383 | 781 | void qmp_migrate_set_speed(int64_t value, Error **errp) |
cab30143 | 782 | { |
cab30143 JQ |
783 | MigrationState *s; |
784 | ||
3dc85383 LC |
785 | if (value < 0) { |
786 | value = 0; | |
99a0db9b | 787 | } |
442773ce PB |
788 | if (value > SIZE_MAX) { |
789 | value = SIZE_MAX; | |
790 | } | |
cab30143 | 791 | |
17549e84 | 792 | s = migrate_get_current(); |
3dc85383 | 793 | s->bandwidth_limit = value; |
442773ce PB |
794 | if (s->file) { |
795 | qemu_file_set_rate_limit(s->file, s->bandwidth_limit / XFER_LIMIT_RATIO); | |
796 | } | |
cab30143 JQ |
797 | } |
798 | ||
4f0a993b | 799 | void qmp_migrate_set_downtime(double value, Error **errp) |
cab30143 | 800 | { |
4f0a993b LC |
801 | value *= 1e9; |
802 | value = MAX(0, MIN(UINT64_MAX, value)); | |
803 | max_downtime = (uint64_t)value; | |
99a0db9b | 804 | } |
17ad9b35 | 805 | |
bde1e2ec CV |
806 | bool migrate_auto_converge(void) |
807 | { | |
808 | MigrationState *s; | |
809 | ||
810 | s = migrate_get_current(); | |
811 | ||
812 | return s->enabled_capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; | |
813 | } | |
814 | ||
323004a3 PL |
815 | bool migrate_zero_blocks(void) |
816 | { | |
817 | MigrationState *s; | |
818 | ||
819 | s = migrate_get_current(); | |
820 | ||
821 | return s->enabled_capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS]; | |
822 | } | |
823 | ||
8706d2d5 LL |
824 | bool migrate_use_compression(void) |
825 | { | |
dde4e694 LL |
826 | MigrationState *s; |
827 | ||
828 | s = migrate_get_current(); | |
829 | ||
830 | return s->enabled_capabilities[MIGRATION_CAPABILITY_COMPRESS]; | |
8706d2d5 LL |
831 | } |
832 | ||
833 | int migrate_compress_level(void) | |
834 | { | |
835 | MigrationState *s; | |
836 | ||
837 | s = migrate_get_current(); | |
838 | ||
43c60a81 | 839 | return s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; |
8706d2d5 LL |
840 | } |
841 | ||
842 | int migrate_compress_threads(void) | |
843 | { | |
844 | MigrationState *s; | |
845 | ||
846 | s = migrate_get_current(); | |
847 | ||
43c60a81 | 848 | return s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; |
8706d2d5 LL |
849 | } |
850 | ||
3fcb38c2 LL |
851 | int migrate_decompress_threads(void) |
852 | { | |
853 | MigrationState *s; | |
854 | ||
855 | s = migrate_get_current(); | |
856 | ||
43c60a81 | 857 | return s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; |
3fcb38c2 LL |
858 | } |
859 | ||
17ad9b35 OW |
860 | int migrate_use_xbzrle(void) |
861 | { | |
862 | MigrationState *s; | |
863 | ||
864 | s = migrate_get_current(); | |
865 | ||
866 | return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE]; | |
867 | } | |
868 | ||
869 | int64_t migrate_xbzrle_cache_size(void) | |
870 | { | |
871 | MigrationState *s; | |
872 | ||
873 | s = migrate_get_current(); | |
874 | ||
875 | return s->xbzrle_cache_size; | |
876 | } | |
0d82d0e8 JQ |
877 | |
878 | /* migration thread support */ | |
879 | ||
5f496a1b | 880 | static void *migration_thread(void *opaque) |
0d82d0e8 | 881 | { |
9848a404 | 882 | MigrationState *s = opaque; |
bc72ad67 AB |
883 | int64_t initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
884 | int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST); | |
be7172e2 | 885 | int64_t initial_bytes = 0; |
0d82d0e8 | 886 | int64_t max_size = 0; |
a3fa1d78 PB |
887 | int64_t start_time = initial_time; |
888 | bool old_vm_running = false; | |
76f5933a | 889 | |
f796baa1 | 890 | qemu_savevm_state_header(s->file); |
dba433c0 | 891 | qemu_savevm_state_begin(s->file, &s->params); |
0d82d0e8 | 892 | |
bc72ad67 | 893 | s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start; |
31194731 | 894 | migrate_set_state(s, MIGRATION_STATUS_SETUP, MIGRATION_STATUS_ACTIVE); |
29ae8a41 | 895 | |
31194731 | 896 | while (s->state == MIGRATION_STATUS_ACTIVE) { |
a3e879cd | 897 | int64_t current_time; |
c369f40d | 898 | uint64_t pending_size; |
0d82d0e8 | 899 | |
a0ff044b | 900 | if (!qemu_file_rate_limit(s->file)) { |
c369f40d | 901 | pending_size = qemu_savevm_state_pending(s->file, max_size); |
9013dca5 | 902 | trace_migrate_pending(pending_size, max_size); |
b22ff1fb | 903 | if (pending_size && pending_size >= max_size) { |
dba433c0 | 904 | qemu_savevm_state_iterate(s->file); |
c369f40d | 905 | } else { |
0e1146a7 KW |
906 | int ret; |
907 | ||
32c835ba | 908 | qemu_mutex_lock_iothread(); |
bc72ad67 | 909 | start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
c369f40d | 910 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER); |
a3fa1d78 | 911 | old_vm_running = runstate_is_running(); |
0e1146a7 | 912 | |
df4b1024 JQ |
913 | ret = global_state_store(); |
914 | if (!ret) { | |
915 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); | |
916 | if (ret >= 0) { | |
917 | qemu_file_set_rate_limit(s->file, INT64_MAX); | |
918 | qemu_savevm_state_complete(s->file); | |
919 | } | |
0e1146a7 | 920 | } |
32c835ba | 921 | qemu_mutex_unlock_iothread(); |
0e1146a7 KW |
922 | |
923 | if (ret < 0) { | |
31194731 HZ |
924 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
925 | MIGRATION_STATUS_FAILED); | |
0e1146a7 KW |
926 | break; |
927 | } | |
928 | ||
059f896c | 929 | if (!qemu_file_get_error(s->file)) { |
31194731 HZ |
930 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
931 | MIGRATION_STATUS_COMPLETED); | |
059f896c PB |
932 | break; |
933 | } | |
c369f40d JQ |
934 | } |
935 | } | |
f4410a5d | 936 | |
fd45ee2c | 937 | if (qemu_file_get_error(s->file)) { |
31194731 HZ |
938 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
939 | MIGRATION_STATUS_FAILED); | |
fd45ee2c PB |
940 | break; |
941 | } | |
bc72ad67 | 942 | current_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0d82d0e8 | 943 | if (current_time >= initial_time + BUFFER_DELAY) { |
be7172e2 | 944 | uint64_t transferred_bytes = qemu_ftell(s->file) - initial_bytes; |
77417f10 | 945 | uint64_t time_spent = current_time - initial_time; |
0d82d0e8 JQ |
946 | double bandwidth = transferred_bytes / time_spent; |
947 | max_size = bandwidth * migrate_max_downtime() / 1000000; | |
948 | ||
7e114f8c MH |
949 | s->mbps = time_spent ? (((double) transferred_bytes * 8.0) / |
950 | ((double) time_spent / 1000.0)) / 1000.0 / 1000.0 : -1; | |
951 | ||
9013dca5 AK |
952 | trace_migrate_transferred(transferred_bytes, time_spent, |
953 | bandwidth, max_size); | |
90f8ae72 JQ |
954 | /* if we haven't sent anything, we don't want to recalculate |
955 | 10000 is a small enough number for our purposes */ | |
956 | if (s->dirty_bytes_rate && transferred_bytes > 10000) { | |
957 | s->expected_downtime = s->dirty_bytes_rate / bandwidth; | |
958 | } | |
0d82d0e8 | 959 | |
1964a397 | 960 | qemu_file_reset_rate_limit(s->file); |
0d82d0e8 | 961 | initial_time = current_time; |
be7172e2 | 962 | initial_bytes = qemu_ftell(s->file); |
0d82d0e8 | 963 | } |
a0ff044b | 964 | if (qemu_file_rate_limit(s->file)) { |
0d82d0e8 JQ |
965 | /* usleep expects microseconds */ |
966 | g_usleep((initial_time + BUFFER_DELAY - current_time)*1000); | |
967 | } | |
a3fa1d78 PB |
968 | } |
969 | ||
f4410a5d | 970 | qemu_mutex_lock_iothread(); |
31194731 | 971 | if (s->state == MIGRATION_STATUS_COMPLETED) { |
bc72ad67 | 972 | int64_t end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
d6ed7312 | 973 | uint64_t transferred_bytes = qemu_ftell(s->file); |
a3fa1d78 PB |
974 | s->total_time = end_time - s->total_time; |
975 | s->downtime = end_time - start_time; | |
d6ed7312 PL |
976 | if (s->total_time) { |
977 | s->mbps = (((double) transferred_bytes * 8.0) / | |
978 | ((double) s->total_time)) / 1000; | |
979 | } | |
a3fa1d78 PB |
980 | runstate_set(RUN_STATE_POSTMIGRATE); |
981 | } else { | |
982 | if (old_vm_running) { | |
a3fa1d78 | 983 | vm_start(); |
dba433c0 | 984 | } |
0d82d0e8 | 985 | } |
bb1fadc4 | 986 | qemu_bh_schedule(s->cleanup_bh); |
dba433c0 | 987 | qemu_mutex_unlock_iothread(); |
f4410a5d | 988 | |
0d82d0e8 JQ |
989 | return NULL; |
990 | } | |
991 | ||
9848a404 | 992 | void migrate_fd_connect(MigrationState *s) |
0d82d0e8 | 993 | { |
cc283e3b JQ |
994 | /* This is a best 1st approximation. ns to ms */ |
995 | s->expected_downtime = max_downtime/1000000; | |
bb1fadc4 | 996 | s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s); |
0d82d0e8 | 997 | |
442773ce PB |
998 | qemu_file_set_rate_limit(s->file, |
999 | s->bandwidth_limit / XFER_LIMIT_RATIO); | |
1000 | ||
9287ac27 SH |
1001 | /* Notify before starting migration thread */ |
1002 | notifier_list_notify(&migration_state_notifiers, s); | |
1003 | ||
8706d2d5 | 1004 | migrate_compress_threads_create(); |
4900116e | 1005 | qemu_thread_create(&s->thread, "migration", migration_thread, s, |
bb1fadc4 | 1006 | QEMU_THREAD_JOINABLE); |
0d82d0e8 | 1007 | } |