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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" |
598cd2bd | 30 | #include "qapi-event.h" |
065e2813 | 31 | |
d0ae46c1 | 32 | #define MAX_THROTTLE (32 << 20) /* Migration speed throttling */ |
5bb7910a | 33 | |
5b4e1eb7 JQ |
34 | /* Amount of time to allocate to each "chunk" of bandwidth-throttled |
35 | * data. */ | |
36 | #define BUFFER_DELAY 100 | |
37 | #define XFER_LIMIT_RATIO (1000 / BUFFER_DELAY) | |
38 | ||
8706d2d5 LL |
39 | /* Default compression thread count */ |
40 | #define DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT 8 | |
3fcb38c2 LL |
41 | /* Default decompression thread count, usually decompression is at |
42 | * least 4 times as fast as compression.*/ | |
43 | #define DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT 2 | |
8706d2d5 LL |
44 | /*0: means nocompress, 1: best speed, ... 9: best compress ratio */ |
45 | #define DEFAULT_MIGRATE_COMPRESS_LEVEL 1 | |
46 | ||
17ad9b35 OW |
47 | /* Migration XBZRLE default cache size */ |
48 | #define DEFAULT_MIGRATE_CACHE_SIZE (64 * 1024 * 1024) | |
49 | ||
99a0db9b GH |
50 | static NotifierList migration_state_notifiers = |
51 | NOTIFIER_LIST_INITIALIZER(migration_state_notifiers); | |
52 | ||
adde220a DDAG |
53 | static bool deferred_incoming; |
54 | ||
17549e84 JQ |
55 | /* When we add fault tolerance, we could have several |
56 | migrations at once. For now we don't need to add | |
57 | dynamic creation of migration */ | |
58 | ||
bca7856a | 59 | /* For outgoing */ |
859bc756 | 60 | MigrationState *migrate_get_current(void) |
17549e84 JQ |
61 | { |
62 | static MigrationState current_migration = { | |
31194731 | 63 | .state = MIGRATION_STATUS_NONE, |
d0ae46c1 | 64 | .bandwidth_limit = MAX_THROTTLE, |
17ad9b35 | 65 | .xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE, |
7e114f8c | 66 | .mbps = -1, |
43c60a81 LL |
67 | .parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = |
68 | DEFAULT_MIGRATE_COMPRESS_LEVEL, | |
69 | .parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = | |
70 | DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT, | |
71 | .parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = | |
72 | DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT, | |
17549e84 JQ |
73 | }; |
74 | ||
75 | return ¤t_migration; | |
76 | } | |
77 | ||
bca7856a DDAG |
78 | /* For incoming */ |
79 | static MigrationIncomingState *mis_current; | |
80 | ||
81 | MigrationIncomingState *migration_incoming_get_current(void) | |
82 | { | |
83 | return mis_current; | |
84 | } | |
85 | ||
86 | MigrationIncomingState *migration_incoming_state_new(QEMUFile* f) | |
87 | { | |
88 | mis_current = g_malloc0(sizeof(MigrationIncomingState)); | |
89 | mis_current->file = f; | |
1a8f46f8 | 90 | QLIST_INIT(&mis_current->loadvm_handlers); |
bca7856a DDAG |
91 | |
92 | return mis_current; | |
93 | } | |
94 | ||
95 | void migration_incoming_state_destroy(void) | |
96 | { | |
1a8f46f8 | 97 | loadvm_free_handlers(mis_current); |
bca7856a DDAG |
98 | g_free(mis_current); |
99 | mis_current = NULL; | |
100 | } | |
101 | ||
df4b1024 JQ |
102 | |
103 | typedef struct { | |
13d16814 | 104 | bool optional; |
df4b1024 JQ |
105 | uint32_t size; |
106 | uint8_t runstate[100]; | |
172c4356 JQ |
107 | RunState state; |
108 | bool received; | |
df4b1024 JQ |
109 | } GlobalState; |
110 | ||
111 | static GlobalState global_state; | |
112 | ||
113 | static int global_state_store(void) | |
114 | { | |
115 | if (!runstate_store((char *)global_state.runstate, | |
116 | sizeof(global_state.runstate))) { | |
117 | error_report("runstate name too big: %s", global_state.runstate); | |
118 | trace_migrate_state_too_big(); | |
119 | return -EINVAL; | |
120 | } | |
121 | return 0; | |
122 | } | |
123 | ||
172c4356 | 124 | static bool global_state_received(void) |
df4b1024 | 125 | { |
172c4356 JQ |
126 | return global_state.received; |
127 | } | |
128 | ||
129 | static RunState global_state_get_runstate(void) | |
130 | { | |
131 | return global_state.state; | |
df4b1024 JQ |
132 | } |
133 | ||
13d16814 JQ |
134 | void global_state_set_optional(void) |
135 | { | |
136 | global_state.optional = true; | |
137 | } | |
138 | ||
139 | static bool global_state_needed(void *opaque) | |
140 | { | |
141 | GlobalState *s = opaque; | |
142 | char *runstate = (char *)s->runstate; | |
143 | ||
144 | /* If it is not optional, it is mandatory */ | |
145 | ||
146 | if (s->optional == false) { | |
147 | return true; | |
148 | } | |
149 | ||
150 | /* If state is running or paused, it is not needed */ | |
151 | ||
152 | if (strcmp(runstate, "running") == 0 || | |
153 | strcmp(runstate, "paused") == 0) { | |
154 | return false; | |
155 | } | |
156 | ||
157 | /* for any other state it is needed */ | |
158 | return true; | |
159 | } | |
160 | ||
df4b1024 JQ |
161 | static int global_state_post_load(void *opaque, int version_id) |
162 | { | |
163 | GlobalState *s = opaque; | |
172c4356 JQ |
164 | Error *local_err = NULL; |
165 | int r; | |
df4b1024 JQ |
166 | char *runstate = (char *)s->runstate; |
167 | ||
172c4356 | 168 | s->received = true; |
df4b1024 JQ |
169 | trace_migrate_global_state_post_load(runstate); |
170 | ||
172c4356 | 171 | r = qapi_enum_parse(RunState_lookup, runstate, RUN_STATE_MAX, |
df4b1024 JQ |
172 | -1, &local_err); |
173 | ||
172c4356 JQ |
174 | if (r == -1) { |
175 | if (local_err) { | |
176 | error_report_err(local_err); | |
df4b1024 | 177 | } |
172c4356 | 178 | return -EINVAL; |
df4b1024 | 179 | } |
172c4356 | 180 | s->state = r; |
df4b1024 | 181 | |
172c4356 | 182 | return 0; |
df4b1024 JQ |
183 | } |
184 | ||
185 | static void global_state_pre_save(void *opaque) | |
186 | { | |
187 | GlobalState *s = opaque; | |
188 | ||
189 | trace_migrate_global_state_pre_save((char *)s->runstate); | |
190 | s->size = strlen((char *)s->runstate) + 1; | |
191 | } | |
192 | ||
193 | static const VMStateDescription vmstate_globalstate = { | |
194 | .name = "globalstate", | |
195 | .version_id = 1, | |
196 | .minimum_version_id = 1, | |
197 | .post_load = global_state_post_load, | |
198 | .pre_save = global_state_pre_save, | |
13d16814 | 199 | .needed = global_state_needed, |
df4b1024 JQ |
200 | .fields = (VMStateField[]) { |
201 | VMSTATE_UINT32(size, GlobalState), | |
202 | VMSTATE_BUFFER(runstate, GlobalState), | |
203 | VMSTATE_END_OF_LIST() | |
204 | }, | |
205 | }; | |
206 | ||
207 | void register_global_state(void) | |
208 | { | |
209 | /* We would use it independently that we receive it */ | |
210 | strcpy((char *)&global_state.runstate, ""); | |
172c4356 | 211 | global_state.received = false; |
df4b1024 JQ |
212 | vmstate_register(NULL, 0, &vmstate_globalstate, &global_state); |
213 | } | |
214 | ||
b05dc723 JQ |
215 | static void migrate_generate_event(int new_state) |
216 | { | |
217 | if (migrate_use_events()) { | |
218 | qapi_event_send_migration(new_state, &error_abort); | |
b05dc723 JQ |
219 | } |
220 | } | |
221 | ||
adde220a DDAG |
222 | /* |
223 | * Called on -incoming with a defer: uri. | |
224 | * The migration can be started later after any parameters have been | |
225 | * changed. | |
226 | */ | |
227 | static void deferred_incoming_migration(Error **errp) | |
228 | { | |
229 | if (deferred_incoming) { | |
230 | error_setg(errp, "Incoming migration already deferred"); | |
231 | } | |
232 | deferred_incoming = true; | |
233 | } | |
234 | ||
43eaae28 | 235 | void qemu_start_incoming_migration(const char *uri, Error **errp) |
5bb7910a | 236 | { |
34c9dd8e AL |
237 | const char *p; |
238 | ||
7cf1fe6d | 239 | qapi_event_send_migration(MIGRATION_STATUS_SETUP, &error_abort); |
adde220a DDAG |
240 | if (!strcmp(uri, "defer")) { |
241 | deferred_incoming_migration(errp); | |
242 | } else if (strstart(uri, "tcp:", &p)) { | |
43eaae28 | 243 | tcp_start_incoming_migration(p, errp); |
2da776db | 244 | #ifdef CONFIG_RDMA |
adde220a | 245 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
246 | rdma_start_incoming_migration(p, errp); |
247 | #endif | |
065e2813 | 248 | #if !defined(WIN32) |
adde220a | 249 | } else if (strstart(uri, "exec:", &p)) { |
43eaae28 | 250 | exec_start_incoming_migration(p, errp); |
adde220a | 251 | } else if (strstart(uri, "unix:", &p)) { |
43eaae28 | 252 | unix_start_incoming_migration(p, errp); |
adde220a | 253 | } else if (strstart(uri, "fd:", &p)) { |
43eaae28 | 254 | fd_start_incoming_migration(p, errp); |
065e2813 | 255 | #endif |
adde220a | 256 | } else { |
312fd5f2 | 257 | error_setg(errp, "unknown migration protocol: %s", uri); |
8ca5e801 | 258 | } |
5bb7910a AL |
259 | } |
260 | ||
82a4da79 | 261 | static void process_incoming_migration_co(void *opaque) |
511c0231 | 262 | { |
82a4da79 | 263 | QEMUFile *f = opaque; |
5a8a30db | 264 | Error *local_err = NULL; |
1c12e1f5 PB |
265 | int ret; |
266 | ||
bca7856a | 267 | migration_incoming_state_new(f); |
7cf1fe6d | 268 | migrate_generate_event(MIGRATION_STATUS_ACTIVE); |
1c12e1f5 | 269 | ret = qemu_loadvm_state(f); |
bca7856a | 270 | |
1c12e1f5 | 271 | qemu_fclose(f); |
905f26f2 | 272 | free_xbzrle_decoded_buf(); |
bca7856a DDAG |
273 | migration_incoming_state_destroy(); |
274 | ||
1c12e1f5 | 275 | if (ret < 0) { |
7cf1fe6d | 276 | migrate_generate_event(MIGRATION_STATUS_FAILED); |
db80face | 277 | error_report("load of migration failed: %s", strerror(-ret)); |
3fcb38c2 | 278 | migrate_decompress_threads_join(); |
4aead692 | 279 | exit(EXIT_FAILURE); |
511c0231 | 280 | } |
7cf1fe6d | 281 | migrate_generate_event(MIGRATION_STATUS_COMPLETED); |
511c0231 | 282 | qemu_announce_self(); |
511c0231 | 283 | |
0f15423c | 284 | /* Make sure all file formats flush their mutable metadata */ |
5a8a30db KW |
285 | bdrv_invalidate_cache_all(&local_err); |
286 | if (local_err) { | |
97baf9d9 | 287 | error_report_err(local_err); |
3fcb38c2 | 288 | migrate_decompress_threads_join(); |
5a8a30db KW |
289 | exit(EXIT_FAILURE); |
290 | } | |
0f15423c | 291 | |
172c4356 JQ |
292 | /* If global state section was not received or we are in running |
293 | state, we need to obey autostart. Any other state is set with | |
294 | runstate_set. */ | |
df4b1024 | 295 | |
172c4356 JQ |
296 | if (!global_state_received() || |
297 | global_state_get_runstate() == RUN_STATE_RUNNING) { | |
df4b1024 JQ |
298 | if (autostart) { |
299 | vm_start(); | |
300 | } else { | |
301 | runstate_set(RUN_STATE_PAUSED); | |
302 | } | |
172c4356 JQ |
303 | } else { |
304 | runstate_set(global_state_get_runstate()); | |
f5bbfba1 | 305 | } |
3fcb38c2 | 306 | migrate_decompress_threads_join(); |
511c0231 JQ |
307 | } |
308 | ||
82a4da79 PB |
309 | void process_incoming_migration(QEMUFile *f) |
310 | { | |
311 | Coroutine *co = qemu_coroutine_create(process_incoming_migration_co); | |
312 | int fd = qemu_get_fd(f); | |
313 | ||
314 | assert(fd != -1); | |
3fcb38c2 | 315 | migrate_decompress_threads_create(); |
f9e8cacc | 316 | qemu_set_nonblock(fd); |
82a4da79 PB |
317 | qemu_coroutine_enter(co, f); |
318 | } | |
319 | ||
a0a3fd60 GC |
320 | /* amount of nanoseconds we are willing to wait for migration to be down. |
321 | * the choice of nanoseconds is because it is the maximum resolution that | |
322 | * get_clock() can achieve. It is an internal measure. All user-visible | |
323 | * units must be in seconds */ | |
f7cd55a0 | 324 | static uint64_t max_downtime = 300000000; |
a0a3fd60 GC |
325 | |
326 | uint64_t migrate_max_downtime(void) | |
327 | { | |
328 | return max_downtime; | |
329 | } | |
330 | ||
bbf6da32 OW |
331 | MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) |
332 | { | |
333 | MigrationCapabilityStatusList *head = NULL; | |
334 | MigrationCapabilityStatusList *caps; | |
335 | MigrationState *s = migrate_get_current(); | |
336 | int i; | |
337 | ||
387eedeb | 338 | caps = NULL; /* silence compiler warning */ |
bbf6da32 OW |
339 | for (i = 0; i < MIGRATION_CAPABILITY_MAX; i++) { |
340 | if (head == NULL) { | |
341 | head = g_malloc0(sizeof(*caps)); | |
342 | caps = head; | |
343 | } else { | |
344 | caps->next = g_malloc0(sizeof(*caps)); | |
345 | caps = caps->next; | |
346 | } | |
347 | caps->value = | |
348 | g_malloc(sizeof(*caps->value)); | |
349 | caps->value->capability = i; | |
350 | caps->value->state = s->enabled_capabilities[i]; | |
351 | } | |
352 | ||
353 | return head; | |
354 | } | |
355 | ||
85de8323 LL |
356 | MigrationParameters *qmp_query_migrate_parameters(Error **errp) |
357 | { | |
358 | MigrationParameters *params; | |
359 | MigrationState *s = migrate_get_current(); | |
360 | ||
361 | params = g_malloc0(sizeof(*params)); | |
362 | params->compress_level = s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; | |
363 | params->compress_threads = | |
364 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; | |
365 | params->decompress_threads = | |
366 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; | |
367 | ||
368 | return params; | |
369 | } | |
370 | ||
f36d55af OW |
371 | static void get_xbzrle_cache_stats(MigrationInfo *info) |
372 | { | |
373 | if (migrate_use_xbzrle()) { | |
374 | info->has_xbzrle_cache = true; | |
375 | info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache)); | |
376 | info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size(); | |
377 | info->xbzrle_cache->bytes = xbzrle_mig_bytes_transferred(); | |
378 | info->xbzrle_cache->pages = xbzrle_mig_pages_transferred(); | |
379 | info->xbzrle_cache->cache_miss = xbzrle_mig_pages_cache_miss(); | |
8bc39233 | 380 | info->xbzrle_cache->cache_miss_rate = xbzrle_mig_cache_miss_rate(); |
f36d55af OW |
381 | info->xbzrle_cache->overflow = xbzrle_mig_pages_overflow(); |
382 | } | |
383 | } | |
384 | ||
791e7c82 | 385 | MigrationInfo *qmp_query_migrate(Error **errp) |
5bb7910a | 386 | { |
791e7c82 | 387 | MigrationInfo *info = g_malloc0(sizeof(*info)); |
17549e84 JQ |
388 | MigrationState *s = migrate_get_current(); |
389 | ||
390 | switch (s->state) { | |
31194731 | 391 | case MIGRATION_STATUS_NONE: |
17549e84 JQ |
392 | /* no migration has happened ever */ |
393 | break; | |
31194731 | 394 | case MIGRATION_STATUS_SETUP: |
29ae8a41 | 395 | info->has_status = true; |
ed4fbd10 | 396 | info->has_total_time = false; |
29ae8a41 | 397 | break; |
31194731 HZ |
398 | case MIGRATION_STATUS_ACTIVE: |
399 | case MIGRATION_STATUS_CANCELLING: | |
791e7c82 | 400 | info->has_status = true; |
7aa939af | 401 | info->has_total_time = true; |
bc72ad67 | 402 | info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) |
7aa939af | 403 | - s->total_time; |
2c52ddf1 JQ |
404 | info->has_expected_downtime = true; |
405 | info->expected_downtime = s->expected_downtime; | |
ed4fbd10 MH |
406 | info->has_setup_time = true; |
407 | info->setup_time = s->setup_time; | |
17549e84 | 408 | |
791e7c82 LC |
409 | info->has_ram = true; |
410 | info->ram = g_malloc0(sizeof(*info->ram)); | |
411 | info->ram->transferred = ram_bytes_transferred(); | |
412 | info->ram->remaining = ram_bytes_remaining(); | |
413 | info->ram->total = ram_bytes_total(); | |
004d4c10 | 414 | info->ram->duplicate = dup_mig_pages_transferred(); |
f1c72795 | 415 | info->ram->skipped = skipped_mig_pages_transferred(); |
004d4c10 OW |
416 | info->ram->normal = norm_mig_pages_transferred(); |
417 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
8d017193 | 418 | info->ram->dirty_pages_rate = s->dirty_pages_rate; |
7e114f8c | 419 | info->ram->mbps = s->mbps; |
58570ed8 | 420 | info->ram->dirty_sync_count = s->dirty_sync_count; |
8d017193 | 421 | |
17549e84 | 422 | if (blk_mig_active()) { |
791e7c82 LC |
423 | info->has_disk = true; |
424 | info->disk = g_malloc0(sizeof(*info->disk)); | |
425 | info->disk->transferred = blk_mig_bytes_transferred(); | |
426 | info->disk->remaining = blk_mig_bytes_remaining(); | |
427 | info->disk->total = blk_mig_bytes_total(); | |
ff8d81d8 | 428 | } |
f36d55af OW |
429 | |
430 | get_xbzrle_cache_stats(info); | |
17549e84 | 431 | break; |
31194731 | 432 | case MIGRATION_STATUS_COMPLETED: |
f36d55af OW |
433 | get_xbzrle_cache_stats(info); |
434 | ||
791e7c82 | 435 | info->has_status = true; |
00c14997 | 436 | info->has_total_time = true; |
7aa939af | 437 | info->total_time = s->total_time; |
9c5a9fcf JQ |
438 | info->has_downtime = true; |
439 | info->downtime = s->downtime; | |
ed4fbd10 MH |
440 | info->has_setup_time = true; |
441 | info->setup_time = s->setup_time; | |
d5f8a570 JQ |
442 | |
443 | info->has_ram = true; | |
444 | info->ram = g_malloc0(sizeof(*info->ram)); | |
445 | info->ram->transferred = ram_bytes_transferred(); | |
446 | info->ram->remaining = 0; | |
447 | info->ram->total = ram_bytes_total(); | |
004d4c10 | 448 | info->ram->duplicate = dup_mig_pages_transferred(); |
f1c72795 | 449 | info->ram->skipped = skipped_mig_pages_transferred(); |
004d4c10 OW |
450 | info->ram->normal = norm_mig_pages_transferred(); |
451 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
7e114f8c | 452 | info->ram->mbps = s->mbps; |
58570ed8 | 453 | info->ram->dirty_sync_count = s->dirty_sync_count; |
17549e84 | 454 | break; |
31194731 | 455 | case MIGRATION_STATUS_FAILED: |
791e7c82 | 456 | info->has_status = true; |
17549e84 | 457 | break; |
31194731 | 458 | case MIGRATION_STATUS_CANCELLED: |
791e7c82 | 459 | info->has_status = true; |
17549e84 | 460 | break; |
5bb7910a | 461 | } |
cde63fbe | 462 | info->status = s->state; |
791e7c82 LC |
463 | |
464 | return info; | |
5bb7910a AL |
465 | } |
466 | ||
00458433 OW |
467 | void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, |
468 | Error **errp) | |
469 | { | |
470 | MigrationState *s = migrate_get_current(); | |
471 | MigrationCapabilityStatusList *cap; | |
472 | ||
31194731 HZ |
473 | if (s->state == MIGRATION_STATUS_ACTIVE || |
474 | s->state == MIGRATION_STATUS_SETUP) { | |
c6bd8c70 | 475 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
00458433 OW |
476 | return; |
477 | } | |
478 | ||
479 | for (cap = params; cap; cap = cap->next) { | |
480 | s->enabled_capabilities[cap->value->capability] = cap->value->state; | |
481 | } | |
482 | } | |
483 | ||
85de8323 LL |
484 | void qmp_migrate_set_parameters(bool has_compress_level, |
485 | int64_t compress_level, | |
486 | bool has_compress_threads, | |
487 | int64_t compress_threads, | |
488 | bool has_decompress_threads, | |
489 | int64_t decompress_threads, Error **errp) | |
490 | { | |
491 | MigrationState *s = migrate_get_current(); | |
492 | ||
493 | if (has_compress_level && (compress_level < 0 || compress_level > 9)) { | |
c6bd8c70 MA |
494 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level", |
495 | "is invalid, it should be in the range of 0 to 9"); | |
85de8323 LL |
496 | return; |
497 | } | |
498 | if (has_compress_threads && | |
499 | (compress_threads < 1 || compress_threads > 255)) { | |
c6bd8c70 MA |
500 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
501 | "compress_threads", | |
502 | "is invalid, it should be in the range of 1 to 255"); | |
85de8323 LL |
503 | return; |
504 | } | |
505 | if (has_decompress_threads && | |
506 | (decompress_threads < 1 || decompress_threads > 255)) { | |
c6bd8c70 MA |
507 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
508 | "decompress_threads", | |
509 | "is invalid, it should be in the range of 1 to 255"); | |
85de8323 LL |
510 | return; |
511 | } | |
512 | ||
513 | if (has_compress_level) { | |
514 | s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = compress_level; | |
515 | } | |
516 | if (has_compress_threads) { | |
517 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = compress_threads; | |
518 | } | |
519 | if (has_decompress_threads) { | |
520 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = | |
521 | decompress_threads; | |
522 | } | |
523 | } | |
524 | ||
065e2813 AL |
525 | /* shared migration helpers */ |
526 | ||
51cf4c1a Z |
527 | static void migrate_set_state(MigrationState *s, int old_state, int new_state) |
528 | { | |
a5c17b5f | 529 | if (atomic_cmpxchg(&s->state, old_state, new_state) == old_state) { |
4ba4bc5e | 530 | trace_migrate_set_state(new_state); |
b05dc723 | 531 | migrate_generate_event(new_state); |
51cf4c1a Z |
532 | } |
533 | } | |
534 | ||
bb1fadc4 | 535 | static void migrate_fd_cleanup(void *opaque) |
065e2813 | 536 | { |
bb1fadc4 PB |
537 | MigrationState *s = opaque; |
538 | ||
539 | qemu_bh_delete(s->cleanup_bh); | |
540 | s->cleanup_bh = NULL; | |
541 | ||
065e2813 | 542 | if (s->file) { |
9013dca5 | 543 | trace_migrate_fd_cleanup(); |
404a7c05 PB |
544 | qemu_mutex_unlock_iothread(); |
545 | qemu_thread_join(&s->thread); | |
546 | qemu_mutex_lock_iothread(); | |
547 | ||
8706d2d5 | 548 | migrate_compress_threads_join(); |
6f190a06 PB |
549 | qemu_fclose(s->file); |
550 | s->file = NULL; | |
065e2813 AL |
551 | } |
552 | ||
31194731 | 553 | assert(s->state != MIGRATION_STATUS_ACTIVE); |
7a2c1721 | 554 | |
31194731 | 555 | if (s->state != MIGRATION_STATUS_COMPLETED) { |
7a2c1721 | 556 | qemu_savevm_state_cancel(); |
31194731 HZ |
557 | if (s->state == MIGRATION_STATUS_CANCELLING) { |
558 | migrate_set_state(s, MIGRATION_STATUS_CANCELLING, | |
559 | MIGRATION_STATUS_CANCELLED); | |
51cf4c1a | 560 | } |
7a2c1721 | 561 | } |
a3fa1d78 PB |
562 | |
563 | notifier_list_notify(&migration_state_notifiers, s); | |
065e2813 AL |
564 | } |
565 | ||
8b6b99b3 | 566 | void migrate_fd_error(MigrationState *s) |
065e2813 | 567 | { |
9013dca5 | 568 | trace_migrate_fd_error(); |
bb1fadc4 | 569 | assert(s->file == NULL); |
7844337d | 570 | migrate_set_state(s, MIGRATION_STATUS_SETUP, MIGRATION_STATUS_FAILED); |
bb1fadc4 | 571 | notifier_list_notify(&migration_state_notifiers, s); |
458cf28e JQ |
572 | } |
573 | ||
0edda1c4 | 574 | static void migrate_fd_cancel(MigrationState *s) |
065e2813 | 575 | { |
6f2b811a | 576 | int old_state ; |
a26ba26e | 577 | QEMUFile *f = migrate_get_current()->file; |
9013dca5 | 578 | trace_migrate_fd_cancel(); |
065e2813 | 579 | |
6f2b811a Z |
580 | do { |
581 | old_state = s->state; | |
31194731 HZ |
582 | if (old_state != MIGRATION_STATUS_SETUP && |
583 | old_state != MIGRATION_STATUS_ACTIVE) { | |
6f2b811a Z |
584 | break; |
585 | } | |
31194731 HZ |
586 | migrate_set_state(s, old_state, MIGRATION_STATUS_CANCELLING); |
587 | } while (s->state != MIGRATION_STATUS_CANCELLING); | |
a26ba26e DDAG |
588 | |
589 | /* | |
590 | * If we're unlucky the migration code might be stuck somewhere in a | |
591 | * send/write while the network has failed and is waiting to timeout; | |
592 | * if we've got shutdown(2) available then we can force it to quit. | |
593 | * The outgoing qemu file gets closed in migrate_fd_cleanup that is | |
594 | * called in a bh, so there is no race against this cancel. | |
595 | */ | |
31194731 | 596 | if (s->state == MIGRATION_STATUS_CANCELLING && f) { |
a26ba26e DDAG |
597 | qemu_file_shutdown(f); |
598 | } | |
065e2813 AL |
599 | } |
600 | ||
99a0db9b GH |
601 | void add_migration_state_change_notifier(Notifier *notify) |
602 | { | |
603 | notifier_list_add(&migration_state_notifiers, notify); | |
604 | } | |
605 | ||
606 | void remove_migration_state_change_notifier(Notifier *notify) | |
607 | { | |
31552529 | 608 | notifier_remove(notify); |
99a0db9b GH |
609 | } |
610 | ||
02edd2e7 | 611 | bool migration_in_setup(MigrationState *s) |
afe2df69 | 612 | { |
31194731 | 613 | return s->state == MIGRATION_STATUS_SETUP; |
afe2df69 GH |
614 | } |
615 | ||
7073693b | 616 | bool migration_has_finished(MigrationState *s) |
99a0db9b | 617 | { |
31194731 | 618 | return s->state == MIGRATION_STATUS_COMPLETED; |
99a0db9b | 619 | } |
0edda1c4 | 620 | |
afe2df69 GH |
621 | bool migration_has_failed(MigrationState *s) |
622 | { | |
31194731 HZ |
623 | return (s->state == MIGRATION_STATUS_CANCELLED || |
624 | s->state == MIGRATION_STATUS_FAILED); | |
afe2df69 GH |
625 | } |
626 | ||
6607ae23 | 627 | static MigrationState *migrate_init(const MigrationParams *params) |
0edda1c4 | 628 | { |
17549e84 | 629 | MigrationState *s = migrate_get_current(); |
d0ae46c1 | 630 | int64_t bandwidth_limit = s->bandwidth_limit; |
bbf6da32 | 631 | bool enabled_capabilities[MIGRATION_CAPABILITY_MAX]; |
17ad9b35 | 632 | int64_t xbzrle_cache_size = s->xbzrle_cache_size; |
43c60a81 LL |
633 | int compress_level = s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; |
634 | int compress_thread_count = | |
635 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; | |
636 | int decompress_thread_count = | |
637 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; | |
bbf6da32 OW |
638 | |
639 | memcpy(enabled_capabilities, s->enabled_capabilities, | |
640 | sizeof(enabled_capabilities)); | |
0edda1c4 | 641 | |
17549e84 | 642 | memset(s, 0, sizeof(*s)); |
6607ae23 | 643 | s->params = *params; |
bbf6da32 OW |
644 | memcpy(s->enabled_capabilities, enabled_capabilities, |
645 | sizeof(enabled_capabilities)); | |
17ad9b35 | 646 | s->xbzrle_cache_size = xbzrle_cache_size; |
1299c631 | 647 | |
43c60a81 LL |
648 | s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = compress_level; |
649 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = | |
650 | compress_thread_count; | |
651 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = | |
652 | decompress_thread_count; | |
0edda1c4 | 653 | s->bandwidth_limit = bandwidth_limit; |
7844337d | 654 | migrate_set_state(s, MIGRATION_STATUS_NONE, MIGRATION_STATUS_SETUP); |
0edda1c4 | 655 | |
bc72ad67 | 656 | s->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0edda1c4 JQ |
657 | return s; |
658 | } | |
cab30143 | 659 | |
fa2756b7 AL |
660 | static GSList *migration_blockers; |
661 | ||
662 | void migrate_add_blocker(Error *reason) | |
663 | { | |
664 | migration_blockers = g_slist_prepend(migration_blockers, reason); | |
665 | } | |
666 | ||
667 | void migrate_del_blocker(Error *reason) | |
668 | { | |
669 | migration_blockers = g_slist_remove(migration_blockers, reason); | |
670 | } | |
671 | ||
bf1ae1f4 DDAG |
672 | void qmp_migrate_incoming(const char *uri, Error **errp) |
673 | { | |
674 | Error *local_err = NULL; | |
4debb5f5 | 675 | static bool once = true; |
bf1ae1f4 DDAG |
676 | |
677 | if (!deferred_incoming) { | |
4debb5f5 | 678 | error_setg(errp, "For use with '-incoming defer'"); |
bf1ae1f4 DDAG |
679 | return; |
680 | } | |
4debb5f5 DDAG |
681 | if (!once) { |
682 | error_setg(errp, "The incoming migration has already been started"); | |
683 | } | |
bf1ae1f4 DDAG |
684 | |
685 | qemu_start_incoming_migration(uri, &local_err); | |
686 | ||
687 | if (local_err) { | |
688 | error_propagate(errp, local_err); | |
689 | return; | |
690 | } | |
691 | ||
4debb5f5 | 692 | once = false; |
bf1ae1f4 DDAG |
693 | } |
694 | ||
e1c37d0e LC |
695 | void qmp_migrate(const char *uri, bool has_blk, bool blk, |
696 | bool has_inc, bool inc, bool has_detach, bool detach, | |
697 | Error **errp) | |
cab30143 | 698 | { |
be7059cd | 699 | Error *local_err = NULL; |
17549e84 | 700 | MigrationState *s = migrate_get_current(); |
6607ae23 | 701 | MigrationParams params; |
cab30143 | 702 | const char *p; |
cab30143 | 703 | |
8c0426ae PP |
704 | params.blk = has_blk && blk; |
705 | params.shared = has_inc && inc; | |
6607ae23 | 706 | |
31194731 HZ |
707 | if (s->state == MIGRATION_STATUS_ACTIVE || |
708 | s->state == MIGRATION_STATUS_SETUP || | |
709 | s->state == MIGRATION_STATUS_CANCELLING) { | |
c6bd8c70 | 710 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
e1c37d0e | 711 | return; |
cab30143 | 712 | } |
ca99993a DDAG |
713 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
714 | error_setg(errp, "Guest is waiting for an incoming migration"); | |
715 | return; | |
716 | } | |
717 | ||
e1c37d0e LC |
718 | if (qemu_savevm_state_blocked(errp)) { |
719 | return; | |
cab30143 JQ |
720 | } |
721 | ||
fa2756b7 | 722 | if (migration_blockers) { |
e1c37d0e LC |
723 | *errp = error_copy(migration_blockers->data); |
724 | return; | |
fa2756b7 AL |
725 | } |
726 | ||
656a2334 JQ |
727 | /* We are starting a new migration, so we want to start in a clean |
728 | state. This change is only needed if previous migration | |
729 | failed/was cancelled. We don't use migrate_set_state() because | |
730 | we are setting the initial state, not changing it. */ | |
731 | s->state = MIGRATION_STATUS_NONE; | |
732 | ||
6607ae23 | 733 | s = migrate_init(¶ms); |
cab30143 JQ |
734 | |
735 | if (strstart(uri, "tcp:", &p)) { | |
f37afb5a | 736 | tcp_start_outgoing_migration(s, p, &local_err); |
2da776db | 737 | #ifdef CONFIG_RDMA |
41310c68 | 738 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
739 | rdma_start_outgoing_migration(s, p, &local_err); |
740 | #endif | |
cab30143 JQ |
741 | #if !defined(WIN32) |
742 | } else if (strstart(uri, "exec:", &p)) { | |
f37afb5a | 743 | exec_start_outgoing_migration(s, p, &local_err); |
cab30143 | 744 | } else if (strstart(uri, "unix:", &p)) { |
f37afb5a | 745 | unix_start_outgoing_migration(s, p, &local_err); |
cab30143 | 746 | } else if (strstart(uri, "fd:", &p)) { |
f37afb5a | 747 | fd_start_outgoing_migration(s, p, &local_err); |
cab30143 | 748 | #endif |
99a0db9b | 749 | } else { |
c6bd8c70 MA |
750 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "uri", |
751 | "a valid migration protocol"); | |
7844337d | 752 | migrate_set_state(s, MIGRATION_STATUS_SETUP, MIGRATION_STATUS_FAILED); |
e1c37d0e | 753 | return; |
cab30143 JQ |
754 | } |
755 | ||
f37afb5a | 756 | if (local_err) { |
342ab8d1 | 757 | migrate_fd_error(s); |
f37afb5a | 758 | error_propagate(errp, local_err); |
e1c37d0e | 759 | return; |
1299c631 | 760 | } |
cab30143 JQ |
761 | } |
762 | ||
6cdedb07 | 763 | void qmp_migrate_cancel(Error **errp) |
cab30143 | 764 | { |
17549e84 | 765 | migrate_fd_cancel(migrate_get_current()); |
cab30143 JQ |
766 | } |
767 | ||
9e1ba4cc OW |
768 | void qmp_migrate_set_cache_size(int64_t value, Error **errp) |
769 | { | |
770 | MigrationState *s = migrate_get_current(); | |
c91e681a | 771 | int64_t new_size; |
9e1ba4cc OW |
772 | |
773 | /* Check for truncation */ | |
774 | if (value != (size_t)value) { | |
c6bd8c70 MA |
775 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
776 | "exceeding address space"); | |
9e1ba4cc OW |
777 | return; |
778 | } | |
779 | ||
a5615b14 OW |
780 | /* Cache should not be larger than guest ram size */ |
781 | if (value > ram_bytes_total()) { | |
c6bd8c70 MA |
782 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
783 | "exceeds guest ram size "); | |
a5615b14 OW |
784 | return; |
785 | } | |
786 | ||
c91e681a OW |
787 | new_size = xbzrle_cache_resize(value); |
788 | if (new_size < 0) { | |
c6bd8c70 MA |
789 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
790 | "is smaller than page size"); | |
c91e681a OW |
791 | return; |
792 | } | |
793 | ||
794 | s->xbzrle_cache_size = new_size; | |
9e1ba4cc OW |
795 | } |
796 | ||
797 | int64_t qmp_query_migrate_cache_size(Error **errp) | |
798 | { | |
799 | return migrate_xbzrle_cache_size(); | |
800 | } | |
801 | ||
3dc85383 | 802 | void qmp_migrate_set_speed(int64_t value, Error **errp) |
cab30143 | 803 | { |
cab30143 JQ |
804 | MigrationState *s; |
805 | ||
3dc85383 LC |
806 | if (value < 0) { |
807 | value = 0; | |
99a0db9b | 808 | } |
442773ce PB |
809 | if (value > SIZE_MAX) { |
810 | value = SIZE_MAX; | |
811 | } | |
cab30143 | 812 | |
17549e84 | 813 | s = migrate_get_current(); |
3dc85383 | 814 | s->bandwidth_limit = value; |
442773ce PB |
815 | if (s->file) { |
816 | qemu_file_set_rate_limit(s->file, s->bandwidth_limit / XFER_LIMIT_RATIO); | |
817 | } | |
cab30143 JQ |
818 | } |
819 | ||
4f0a993b | 820 | void qmp_migrate_set_downtime(double value, Error **errp) |
cab30143 | 821 | { |
4f0a993b LC |
822 | value *= 1e9; |
823 | value = MAX(0, MIN(UINT64_MAX, value)); | |
824 | max_downtime = (uint64_t)value; | |
99a0db9b | 825 | } |
17ad9b35 | 826 | |
bde1e2ec CV |
827 | bool migrate_auto_converge(void) |
828 | { | |
829 | MigrationState *s; | |
830 | ||
831 | s = migrate_get_current(); | |
832 | ||
833 | return s->enabled_capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; | |
834 | } | |
835 | ||
323004a3 PL |
836 | bool migrate_zero_blocks(void) |
837 | { | |
838 | MigrationState *s; | |
839 | ||
840 | s = migrate_get_current(); | |
841 | ||
842 | return s->enabled_capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS]; | |
843 | } | |
844 | ||
8706d2d5 LL |
845 | bool migrate_use_compression(void) |
846 | { | |
dde4e694 LL |
847 | MigrationState *s; |
848 | ||
849 | s = migrate_get_current(); | |
850 | ||
851 | return s->enabled_capabilities[MIGRATION_CAPABILITY_COMPRESS]; | |
8706d2d5 LL |
852 | } |
853 | ||
854 | int migrate_compress_level(void) | |
855 | { | |
856 | MigrationState *s; | |
857 | ||
858 | s = migrate_get_current(); | |
859 | ||
43c60a81 | 860 | return s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; |
8706d2d5 LL |
861 | } |
862 | ||
863 | int migrate_compress_threads(void) | |
864 | { | |
865 | MigrationState *s; | |
866 | ||
867 | s = migrate_get_current(); | |
868 | ||
43c60a81 | 869 | return s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; |
8706d2d5 LL |
870 | } |
871 | ||
3fcb38c2 LL |
872 | int migrate_decompress_threads(void) |
873 | { | |
874 | MigrationState *s; | |
875 | ||
876 | s = migrate_get_current(); | |
877 | ||
43c60a81 | 878 | return s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; |
3fcb38c2 LL |
879 | } |
880 | ||
b05dc723 JQ |
881 | bool migrate_use_events(void) |
882 | { | |
883 | MigrationState *s; | |
884 | ||
885 | s = migrate_get_current(); | |
886 | ||
887 | return s->enabled_capabilities[MIGRATION_CAPABILITY_EVENTS]; | |
888 | } | |
889 | ||
17ad9b35 OW |
890 | int migrate_use_xbzrle(void) |
891 | { | |
892 | MigrationState *s; | |
893 | ||
894 | s = migrate_get_current(); | |
895 | ||
896 | return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE]; | |
897 | } | |
898 | ||
899 | int64_t migrate_xbzrle_cache_size(void) | |
900 | { | |
901 | MigrationState *s; | |
902 | ||
903 | s = migrate_get_current(); | |
904 | ||
905 | return s->xbzrle_cache_size; | |
906 | } | |
0d82d0e8 JQ |
907 | |
908 | /* migration thread support */ | |
909 | ||
5f496a1b | 910 | static void *migration_thread(void *opaque) |
0d82d0e8 | 911 | { |
9848a404 | 912 | MigrationState *s = opaque; |
bc72ad67 AB |
913 | int64_t initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
914 | int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST); | |
be7172e2 | 915 | int64_t initial_bytes = 0; |
0d82d0e8 | 916 | int64_t max_size = 0; |
a3fa1d78 PB |
917 | int64_t start_time = initial_time; |
918 | bool old_vm_running = false; | |
76f5933a | 919 | |
f796baa1 | 920 | qemu_savevm_state_header(s->file); |
dba433c0 | 921 | qemu_savevm_state_begin(s->file, &s->params); |
0d82d0e8 | 922 | |
bc72ad67 | 923 | s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start; |
31194731 | 924 | migrate_set_state(s, MIGRATION_STATUS_SETUP, MIGRATION_STATUS_ACTIVE); |
29ae8a41 | 925 | |
31194731 | 926 | while (s->state == MIGRATION_STATUS_ACTIVE) { |
a3e879cd | 927 | int64_t current_time; |
c369f40d | 928 | uint64_t pending_size; |
0d82d0e8 | 929 | |
a0ff044b | 930 | if (!qemu_file_rate_limit(s->file)) { |
c369f40d | 931 | pending_size = qemu_savevm_state_pending(s->file, max_size); |
9013dca5 | 932 | trace_migrate_pending(pending_size, max_size); |
b22ff1fb | 933 | if (pending_size && pending_size >= max_size) { |
dba433c0 | 934 | qemu_savevm_state_iterate(s->file); |
c369f40d | 935 | } else { |
0e1146a7 KW |
936 | int ret; |
937 | ||
32c835ba | 938 | qemu_mutex_lock_iothread(); |
bc72ad67 | 939 | start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
c369f40d | 940 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER); |
a3fa1d78 | 941 | old_vm_running = runstate_is_running(); |
0e1146a7 | 942 | |
df4b1024 JQ |
943 | ret = global_state_store(); |
944 | if (!ret) { | |
945 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); | |
946 | if (ret >= 0) { | |
947 | qemu_file_set_rate_limit(s->file, INT64_MAX); | |
948 | qemu_savevm_state_complete(s->file); | |
949 | } | |
0e1146a7 | 950 | } |
32c835ba | 951 | qemu_mutex_unlock_iothread(); |
0e1146a7 KW |
952 | |
953 | if (ret < 0) { | |
31194731 HZ |
954 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
955 | MIGRATION_STATUS_FAILED); | |
0e1146a7 KW |
956 | break; |
957 | } | |
958 | ||
059f896c | 959 | if (!qemu_file_get_error(s->file)) { |
31194731 HZ |
960 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
961 | MIGRATION_STATUS_COMPLETED); | |
059f896c PB |
962 | break; |
963 | } | |
c369f40d JQ |
964 | } |
965 | } | |
f4410a5d | 966 | |
fd45ee2c | 967 | if (qemu_file_get_error(s->file)) { |
31194731 HZ |
968 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
969 | MIGRATION_STATUS_FAILED); | |
fd45ee2c PB |
970 | break; |
971 | } | |
bc72ad67 | 972 | current_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0d82d0e8 | 973 | if (current_time >= initial_time + BUFFER_DELAY) { |
be7172e2 | 974 | uint64_t transferred_bytes = qemu_ftell(s->file) - initial_bytes; |
77417f10 | 975 | uint64_t time_spent = current_time - initial_time; |
0d82d0e8 JQ |
976 | double bandwidth = transferred_bytes / time_spent; |
977 | max_size = bandwidth * migrate_max_downtime() / 1000000; | |
978 | ||
7e114f8c MH |
979 | s->mbps = time_spent ? (((double) transferred_bytes * 8.0) / |
980 | ((double) time_spent / 1000.0)) / 1000.0 / 1000.0 : -1; | |
981 | ||
9013dca5 AK |
982 | trace_migrate_transferred(transferred_bytes, time_spent, |
983 | bandwidth, max_size); | |
90f8ae72 JQ |
984 | /* if we haven't sent anything, we don't want to recalculate |
985 | 10000 is a small enough number for our purposes */ | |
986 | if (s->dirty_bytes_rate && transferred_bytes > 10000) { | |
987 | s->expected_downtime = s->dirty_bytes_rate / bandwidth; | |
988 | } | |
0d82d0e8 | 989 | |
1964a397 | 990 | qemu_file_reset_rate_limit(s->file); |
0d82d0e8 | 991 | initial_time = current_time; |
be7172e2 | 992 | initial_bytes = qemu_ftell(s->file); |
0d82d0e8 | 993 | } |
a0ff044b | 994 | if (qemu_file_rate_limit(s->file)) { |
0d82d0e8 JQ |
995 | /* usleep expects microseconds */ |
996 | g_usleep((initial_time + BUFFER_DELAY - current_time)*1000); | |
997 | } | |
a3fa1d78 PB |
998 | } |
999 | ||
f4410a5d | 1000 | qemu_mutex_lock_iothread(); |
31194731 | 1001 | if (s->state == MIGRATION_STATUS_COMPLETED) { |
bc72ad67 | 1002 | int64_t end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
d6ed7312 | 1003 | uint64_t transferred_bytes = qemu_ftell(s->file); |
a3fa1d78 PB |
1004 | s->total_time = end_time - s->total_time; |
1005 | s->downtime = end_time - start_time; | |
d6ed7312 PL |
1006 | if (s->total_time) { |
1007 | s->mbps = (((double) transferred_bytes * 8.0) / | |
1008 | ((double) s->total_time)) / 1000; | |
1009 | } | |
a3fa1d78 PB |
1010 | runstate_set(RUN_STATE_POSTMIGRATE); |
1011 | } else { | |
1012 | if (old_vm_running) { | |
a3fa1d78 | 1013 | vm_start(); |
dba433c0 | 1014 | } |
0d82d0e8 | 1015 | } |
bb1fadc4 | 1016 | qemu_bh_schedule(s->cleanup_bh); |
dba433c0 | 1017 | qemu_mutex_unlock_iothread(); |
f4410a5d | 1018 | |
0d82d0e8 JQ |
1019 | return NULL; |
1020 | } | |
1021 | ||
9848a404 | 1022 | void migrate_fd_connect(MigrationState *s) |
0d82d0e8 | 1023 | { |
cc283e3b JQ |
1024 | /* This is a best 1st approximation. ns to ms */ |
1025 | s->expected_downtime = max_downtime/1000000; | |
bb1fadc4 | 1026 | s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s); |
0d82d0e8 | 1027 | |
442773ce PB |
1028 | qemu_file_set_rate_limit(s->file, |
1029 | s->bandwidth_limit / XFER_LIMIT_RATIO); | |
1030 | ||
9287ac27 SH |
1031 | /* Notify before starting migration thread */ |
1032 | notifier_list_notify(&migration_state_notifiers, s); | |
1033 | ||
8706d2d5 | 1034 | migrate_compress_threads_create(); |
4900116e | 1035 | qemu_thread_create(&s->thread, "migration", migration_thread, s, |
bb1fadc4 | 1036 | QEMU_THREAD_JOINABLE); |
0d82d0e8 | 1037 | } |