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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" |
ab28bd23 | 25 | #include "qemu/rcu.h" |
caf71f86 | 26 | #include "migration/block.h" |
766bd176 | 27 | #include "qemu/thread.h" |
791e7c82 | 28 | #include "qmp-commands.h" |
c09e5bb1 | 29 | #include "trace.h" |
df4b1024 | 30 | #include "qapi/util.h" |
598cd2bd | 31 | #include "qapi-event.h" |
070afca2 | 32 | #include "qom/cpu.h" |
065e2813 | 33 | |
dc325627 | 34 | #define MAX_THROTTLE (32 << 20) /* Migration transfer speed throttling */ |
5bb7910a | 35 | |
5b4e1eb7 JQ |
36 | /* Amount of time to allocate to each "chunk" of bandwidth-throttled |
37 | * data. */ | |
38 | #define BUFFER_DELAY 100 | |
39 | #define XFER_LIMIT_RATIO (1000 / BUFFER_DELAY) | |
40 | ||
8706d2d5 LL |
41 | /* Default compression thread count */ |
42 | #define DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT 8 | |
3fcb38c2 LL |
43 | /* Default decompression thread count, usually decompression is at |
44 | * least 4 times as fast as compression.*/ | |
45 | #define DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT 2 | |
8706d2d5 LL |
46 | /*0: means nocompress, 1: best speed, ... 9: best compress ratio */ |
47 | #define DEFAULT_MIGRATE_COMPRESS_LEVEL 1 | |
1626fee3 JH |
48 | /* Define default autoconverge cpu throttle migration parameters */ |
49 | #define DEFAULT_MIGRATE_X_CPU_THROTTLE_INITIAL 20 | |
50 | #define DEFAULT_MIGRATE_X_CPU_THROTTLE_INCREMENT 10 | |
8706d2d5 | 51 | |
17ad9b35 OW |
52 | /* Migration XBZRLE default cache size */ |
53 | #define DEFAULT_MIGRATE_CACHE_SIZE (64 * 1024 * 1024) | |
54 | ||
99a0db9b GH |
55 | static NotifierList migration_state_notifiers = |
56 | NOTIFIER_LIST_INITIALIZER(migration_state_notifiers); | |
57 | ||
adde220a DDAG |
58 | static bool deferred_incoming; |
59 | ||
17549e84 JQ |
60 | /* When we add fault tolerance, we could have several |
61 | migrations at once. For now we don't need to add | |
62 | dynamic creation of migration */ | |
63 | ||
bca7856a | 64 | /* For outgoing */ |
859bc756 | 65 | MigrationState *migrate_get_current(void) |
17549e84 JQ |
66 | { |
67 | static MigrationState current_migration = { | |
31194731 | 68 | .state = MIGRATION_STATUS_NONE, |
d0ae46c1 | 69 | .bandwidth_limit = MAX_THROTTLE, |
17ad9b35 | 70 | .xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE, |
7e114f8c | 71 | .mbps = -1, |
43c60a81 LL |
72 | .parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = |
73 | DEFAULT_MIGRATE_COMPRESS_LEVEL, | |
74 | .parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = | |
75 | DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT, | |
76 | .parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = | |
77 | DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT, | |
1626fee3 JH |
78 | .parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL] = |
79 | DEFAULT_MIGRATE_X_CPU_THROTTLE_INITIAL, | |
80 | .parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT] = | |
81 | DEFAULT_MIGRATE_X_CPU_THROTTLE_INCREMENT, | |
17549e84 JQ |
82 | }; |
83 | ||
84 | return ¤t_migration; | |
85 | } | |
86 | ||
bca7856a DDAG |
87 | /* For incoming */ |
88 | static MigrationIncomingState *mis_current; | |
89 | ||
90 | MigrationIncomingState *migration_incoming_get_current(void) | |
91 | { | |
92 | return mis_current; | |
93 | } | |
94 | ||
95 | MigrationIncomingState *migration_incoming_state_new(QEMUFile* f) | |
96 | { | |
97f3ad35 | 97 | mis_current = g_new0(MigrationIncomingState, 1); |
42e2aa56 | 98 | mis_current->from_src_file = f; |
1a8f46f8 | 99 | QLIST_INIT(&mis_current->loadvm_handlers); |
6decec93 | 100 | qemu_mutex_init(&mis_current->rp_mutex); |
bca7856a DDAG |
101 | |
102 | return mis_current; | |
103 | } | |
104 | ||
105 | void migration_incoming_state_destroy(void) | |
106 | { | |
1a8f46f8 | 107 | loadvm_free_handlers(mis_current); |
bca7856a DDAG |
108 | g_free(mis_current); |
109 | mis_current = NULL; | |
110 | } | |
111 | ||
df4b1024 JQ |
112 | |
113 | typedef struct { | |
13d16814 | 114 | bool optional; |
df4b1024 JQ |
115 | uint32_t size; |
116 | uint8_t runstate[100]; | |
172c4356 JQ |
117 | RunState state; |
118 | bool received; | |
df4b1024 JQ |
119 | } GlobalState; |
120 | ||
121 | static GlobalState global_state; | |
122 | ||
560d027b | 123 | int global_state_store(void) |
df4b1024 JQ |
124 | { |
125 | if (!runstate_store((char *)global_state.runstate, | |
126 | sizeof(global_state.runstate))) { | |
127 | error_report("runstate name too big: %s", global_state.runstate); | |
128 | trace_migrate_state_too_big(); | |
129 | return -EINVAL; | |
130 | } | |
131 | return 0; | |
132 | } | |
133 | ||
c69adea4 AP |
134 | void global_state_store_running(void) |
135 | { | |
136 | const char *state = RunState_lookup[RUN_STATE_RUNNING]; | |
137 | strncpy((char *)global_state.runstate, | |
138 | state, sizeof(global_state.runstate)); | |
139 | } | |
140 | ||
172c4356 | 141 | static bool global_state_received(void) |
df4b1024 | 142 | { |
172c4356 JQ |
143 | return global_state.received; |
144 | } | |
145 | ||
146 | static RunState global_state_get_runstate(void) | |
147 | { | |
148 | return global_state.state; | |
df4b1024 JQ |
149 | } |
150 | ||
13d16814 JQ |
151 | void global_state_set_optional(void) |
152 | { | |
153 | global_state.optional = true; | |
154 | } | |
155 | ||
156 | static bool global_state_needed(void *opaque) | |
157 | { | |
158 | GlobalState *s = opaque; | |
159 | char *runstate = (char *)s->runstate; | |
160 | ||
161 | /* If it is not optional, it is mandatory */ | |
162 | ||
163 | if (s->optional == false) { | |
164 | return true; | |
165 | } | |
166 | ||
167 | /* If state is running or paused, it is not needed */ | |
168 | ||
169 | if (strcmp(runstate, "running") == 0 || | |
170 | strcmp(runstate, "paused") == 0) { | |
171 | return false; | |
172 | } | |
173 | ||
174 | /* for any other state it is needed */ | |
175 | return true; | |
176 | } | |
177 | ||
df4b1024 JQ |
178 | static int global_state_post_load(void *opaque, int version_id) |
179 | { | |
180 | GlobalState *s = opaque; | |
172c4356 JQ |
181 | Error *local_err = NULL; |
182 | int r; | |
df4b1024 JQ |
183 | char *runstate = (char *)s->runstate; |
184 | ||
172c4356 | 185 | s->received = true; |
df4b1024 JQ |
186 | trace_migrate_global_state_post_load(runstate); |
187 | ||
172c4356 | 188 | r = qapi_enum_parse(RunState_lookup, runstate, RUN_STATE_MAX, |
df4b1024 JQ |
189 | -1, &local_err); |
190 | ||
172c4356 JQ |
191 | if (r == -1) { |
192 | if (local_err) { | |
193 | error_report_err(local_err); | |
df4b1024 | 194 | } |
172c4356 | 195 | return -EINVAL; |
df4b1024 | 196 | } |
172c4356 | 197 | s->state = r; |
df4b1024 | 198 | |
172c4356 | 199 | return 0; |
df4b1024 JQ |
200 | } |
201 | ||
202 | static void global_state_pre_save(void *opaque) | |
203 | { | |
204 | GlobalState *s = opaque; | |
205 | ||
206 | trace_migrate_global_state_pre_save((char *)s->runstate); | |
207 | s->size = strlen((char *)s->runstate) + 1; | |
208 | } | |
209 | ||
210 | static const VMStateDescription vmstate_globalstate = { | |
211 | .name = "globalstate", | |
212 | .version_id = 1, | |
213 | .minimum_version_id = 1, | |
214 | .post_load = global_state_post_load, | |
215 | .pre_save = global_state_pre_save, | |
13d16814 | 216 | .needed = global_state_needed, |
df4b1024 JQ |
217 | .fields = (VMStateField[]) { |
218 | VMSTATE_UINT32(size, GlobalState), | |
219 | VMSTATE_BUFFER(runstate, GlobalState), | |
220 | VMSTATE_END_OF_LIST() | |
221 | }, | |
222 | }; | |
223 | ||
224 | void register_global_state(void) | |
225 | { | |
226 | /* We would use it independently that we receive it */ | |
227 | strcpy((char *)&global_state.runstate, ""); | |
172c4356 | 228 | global_state.received = false; |
df4b1024 JQ |
229 | vmstate_register(NULL, 0, &vmstate_globalstate, &global_state); |
230 | } | |
231 | ||
b05dc723 JQ |
232 | static void migrate_generate_event(int new_state) |
233 | { | |
234 | if (migrate_use_events()) { | |
235 | qapi_event_send_migration(new_state, &error_abort); | |
b05dc723 JQ |
236 | } |
237 | } | |
238 | ||
adde220a DDAG |
239 | /* |
240 | * Called on -incoming with a defer: uri. | |
241 | * The migration can be started later after any parameters have been | |
242 | * changed. | |
243 | */ | |
244 | static void deferred_incoming_migration(Error **errp) | |
245 | { | |
246 | if (deferred_incoming) { | |
247 | error_setg(errp, "Incoming migration already deferred"); | |
248 | } | |
249 | deferred_incoming = true; | |
250 | } | |
251 | ||
43eaae28 | 252 | void qemu_start_incoming_migration(const char *uri, Error **errp) |
5bb7910a | 253 | { |
34c9dd8e AL |
254 | const char *p; |
255 | ||
7cf1fe6d | 256 | qapi_event_send_migration(MIGRATION_STATUS_SETUP, &error_abort); |
adde220a DDAG |
257 | if (!strcmp(uri, "defer")) { |
258 | deferred_incoming_migration(errp); | |
259 | } else if (strstart(uri, "tcp:", &p)) { | |
43eaae28 | 260 | tcp_start_incoming_migration(p, errp); |
2da776db | 261 | #ifdef CONFIG_RDMA |
adde220a | 262 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
263 | rdma_start_incoming_migration(p, errp); |
264 | #endif | |
065e2813 | 265 | #if !defined(WIN32) |
adde220a | 266 | } else if (strstart(uri, "exec:", &p)) { |
43eaae28 | 267 | exec_start_incoming_migration(p, errp); |
adde220a | 268 | } else if (strstart(uri, "unix:", &p)) { |
43eaae28 | 269 | unix_start_incoming_migration(p, errp); |
adde220a | 270 | } else if (strstart(uri, "fd:", &p)) { |
43eaae28 | 271 | fd_start_incoming_migration(p, errp); |
065e2813 | 272 | #endif |
adde220a | 273 | } else { |
312fd5f2 | 274 | error_setg(errp, "unknown migration protocol: %s", uri); |
8ca5e801 | 275 | } |
5bb7910a AL |
276 | } |
277 | ||
82a4da79 | 278 | static void process_incoming_migration_co(void *opaque) |
511c0231 | 279 | { |
82a4da79 | 280 | QEMUFile *f = opaque; |
5a8a30db | 281 | Error *local_err = NULL; |
1c12e1f5 PB |
282 | int ret; |
283 | ||
bca7856a | 284 | migration_incoming_state_new(f); |
7cf1fe6d | 285 | migrate_generate_event(MIGRATION_STATUS_ACTIVE); |
1c12e1f5 | 286 | ret = qemu_loadvm_state(f); |
bca7856a | 287 | |
1c12e1f5 | 288 | qemu_fclose(f); |
905f26f2 | 289 | free_xbzrle_decoded_buf(); |
bca7856a DDAG |
290 | migration_incoming_state_destroy(); |
291 | ||
1c12e1f5 | 292 | if (ret < 0) { |
7cf1fe6d | 293 | migrate_generate_event(MIGRATION_STATUS_FAILED); |
db80face | 294 | error_report("load of migration failed: %s", strerror(-ret)); |
3fcb38c2 | 295 | migrate_decompress_threads_join(); |
4aead692 | 296 | exit(EXIT_FAILURE); |
511c0231 | 297 | } |
511c0231 | 298 | |
0f15423c | 299 | /* Make sure all file formats flush their mutable metadata */ |
5a8a30db KW |
300 | bdrv_invalidate_cache_all(&local_err); |
301 | if (local_err) { | |
ed1f3e00 | 302 | migrate_generate_event(MIGRATION_STATUS_FAILED); |
97baf9d9 | 303 | error_report_err(local_err); |
3fcb38c2 | 304 | migrate_decompress_threads_join(); |
5a8a30db KW |
305 | exit(EXIT_FAILURE); |
306 | } | |
0f15423c | 307 | |
92e37622 AS |
308 | /* |
309 | * This must happen after all error conditions are dealt with and | |
310 | * we're sure the VM is going to be running on this host. | |
311 | */ | |
312 | qemu_announce_self(); | |
313 | ||
172c4356 JQ |
314 | /* If global state section was not received or we are in running |
315 | state, we need to obey autostart. Any other state is set with | |
316 | runstate_set. */ | |
df4b1024 | 317 | |
172c4356 JQ |
318 | if (!global_state_received() || |
319 | global_state_get_runstate() == RUN_STATE_RUNNING) { | |
df4b1024 JQ |
320 | if (autostart) { |
321 | vm_start(); | |
322 | } else { | |
323 | runstate_set(RUN_STATE_PAUSED); | |
324 | } | |
172c4356 JQ |
325 | } else { |
326 | runstate_set(global_state_get_runstate()); | |
f5bbfba1 | 327 | } |
3fcb38c2 | 328 | migrate_decompress_threads_join(); |
ed1f3e00 DDAG |
329 | /* |
330 | * This must happen after any state changes since as soon as an external | |
331 | * observer sees this event they might start to prod at the VM assuming | |
332 | * it's ready to use. | |
333 | */ | |
334 | migrate_generate_event(MIGRATION_STATUS_COMPLETED); | |
511c0231 JQ |
335 | } |
336 | ||
82a4da79 PB |
337 | void process_incoming_migration(QEMUFile *f) |
338 | { | |
339 | Coroutine *co = qemu_coroutine_create(process_incoming_migration_co); | |
340 | int fd = qemu_get_fd(f); | |
341 | ||
342 | assert(fd != -1); | |
3fcb38c2 | 343 | migrate_decompress_threads_create(); |
f9e8cacc | 344 | qemu_set_nonblock(fd); |
82a4da79 PB |
345 | qemu_coroutine_enter(co, f); |
346 | } | |
347 | ||
6decec93 DDAG |
348 | /* |
349 | * Send a message on the return channel back to the source | |
350 | * of the migration. | |
351 | */ | |
352 | void migrate_send_rp_message(MigrationIncomingState *mis, | |
353 | enum mig_rp_message_type message_type, | |
354 | uint16_t len, void *data) | |
355 | { | |
356 | trace_migrate_send_rp_message((int)message_type, len); | |
357 | qemu_mutex_lock(&mis->rp_mutex); | |
358 | qemu_put_be16(mis->to_src_file, (unsigned int)message_type); | |
359 | qemu_put_be16(mis->to_src_file, len); | |
360 | qemu_put_buffer(mis->to_src_file, data, len); | |
361 | qemu_fflush(mis->to_src_file); | |
362 | qemu_mutex_unlock(&mis->rp_mutex); | |
363 | } | |
364 | ||
365 | /* | |
366 | * Send a 'SHUT' message on the return channel with the given value | |
367 | * to indicate that we've finished with the RP. Non-0 value indicates | |
368 | * error. | |
369 | */ | |
370 | void migrate_send_rp_shut(MigrationIncomingState *mis, | |
371 | uint32_t value) | |
372 | { | |
373 | uint32_t buf; | |
374 | ||
375 | buf = cpu_to_be32(value); | |
376 | migrate_send_rp_message(mis, MIG_RP_MSG_SHUT, sizeof(buf), &buf); | |
377 | } | |
378 | ||
379 | /* | |
380 | * Send a 'PONG' message on the return channel with the given value | |
381 | * (normally in response to a 'PING') | |
382 | */ | |
383 | void migrate_send_rp_pong(MigrationIncomingState *mis, | |
384 | uint32_t value) | |
385 | { | |
386 | uint32_t buf; | |
387 | ||
388 | buf = cpu_to_be32(value); | |
389 | migrate_send_rp_message(mis, MIG_RP_MSG_PONG, sizeof(buf), &buf); | |
390 | } | |
391 | ||
a0a3fd60 GC |
392 | /* amount of nanoseconds we are willing to wait for migration to be down. |
393 | * the choice of nanoseconds is because it is the maximum resolution that | |
394 | * get_clock() can achieve. It is an internal measure. All user-visible | |
395 | * units must be in seconds */ | |
f7cd55a0 | 396 | static uint64_t max_downtime = 300000000; |
a0a3fd60 GC |
397 | |
398 | uint64_t migrate_max_downtime(void) | |
399 | { | |
400 | return max_downtime; | |
401 | } | |
402 | ||
bbf6da32 OW |
403 | MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) |
404 | { | |
405 | MigrationCapabilityStatusList *head = NULL; | |
406 | MigrationCapabilityStatusList *caps; | |
407 | MigrationState *s = migrate_get_current(); | |
408 | int i; | |
409 | ||
387eedeb | 410 | caps = NULL; /* silence compiler warning */ |
bbf6da32 OW |
411 | for (i = 0; i < MIGRATION_CAPABILITY_MAX; i++) { |
412 | if (head == NULL) { | |
413 | head = g_malloc0(sizeof(*caps)); | |
414 | caps = head; | |
415 | } else { | |
416 | caps->next = g_malloc0(sizeof(*caps)); | |
417 | caps = caps->next; | |
418 | } | |
419 | caps->value = | |
420 | g_malloc(sizeof(*caps->value)); | |
421 | caps->value->capability = i; | |
422 | caps->value->state = s->enabled_capabilities[i]; | |
423 | } | |
424 | ||
425 | return head; | |
426 | } | |
427 | ||
85de8323 LL |
428 | MigrationParameters *qmp_query_migrate_parameters(Error **errp) |
429 | { | |
430 | MigrationParameters *params; | |
431 | MigrationState *s = migrate_get_current(); | |
432 | ||
433 | params = g_malloc0(sizeof(*params)); | |
434 | params->compress_level = s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; | |
435 | params->compress_threads = | |
436 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; | |
437 | params->decompress_threads = | |
438 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; | |
1626fee3 JH |
439 | params->x_cpu_throttle_initial = |
440 | s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL]; | |
441 | params->x_cpu_throttle_increment = | |
442 | s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT]; | |
85de8323 LL |
443 | |
444 | return params; | |
445 | } | |
446 | ||
f6844b99 DDAG |
447 | /* |
448 | * Return true if we're already in the middle of a migration | |
449 | * (i.e. any of the active or setup states) | |
450 | */ | |
451 | static bool migration_is_setup_or_active(int state) | |
452 | { | |
453 | switch (state) { | |
454 | case MIGRATION_STATUS_ACTIVE: | |
455 | case MIGRATION_STATUS_SETUP: | |
456 | return true; | |
457 | ||
458 | default: | |
459 | return false; | |
460 | ||
461 | } | |
462 | } | |
463 | ||
f36d55af OW |
464 | static void get_xbzrle_cache_stats(MigrationInfo *info) |
465 | { | |
466 | if (migrate_use_xbzrle()) { | |
467 | info->has_xbzrle_cache = true; | |
468 | info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache)); | |
469 | info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size(); | |
470 | info->xbzrle_cache->bytes = xbzrle_mig_bytes_transferred(); | |
471 | info->xbzrle_cache->pages = xbzrle_mig_pages_transferred(); | |
472 | info->xbzrle_cache->cache_miss = xbzrle_mig_pages_cache_miss(); | |
8bc39233 | 473 | info->xbzrle_cache->cache_miss_rate = xbzrle_mig_cache_miss_rate(); |
f36d55af OW |
474 | info->xbzrle_cache->overflow = xbzrle_mig_pages_overflow(); |
475 | } | |
476 | } | |
477 | ||
791e7c82 | 478 | MigrationInfo *qmp_query_migrate(Error **errp) |
5bb7910a | 479 | { |
791e7c82 | 480 | MigrationInfo *info = g_malloc0(sizeof(*info)); |
17549e84 JQ |
481 | MigrationState *s = migrate_get_current(); |
482 | ||
483 | switch (s->state) { | |
31194731 | 484 | case MIGRATION_STATUS_NONE: |
17549e84 JQ |
485 | /* no migration has happened ever */ |
486 | break; | |
31194731 | 487 | case MIGRATION_STATUS_SETUP: |
29ae8a41 | 488 | info->has_status = true; |
ed4fbd10 | 489 | info->has_total_time = false; |
29ae8a41 | 490 | break; |
31194731 HZ |
491 | case MIGRATION_STATUS_ACTIVE: |
492 | case MIGRATION_STATUS_CANCELLING: | |
791e7c82 | 493 | info->has_status = true; |
7aa939af | 494 | info->has_total_time = true; |
bc72ad67 | 495 | info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) |
7aa939af | 496 | - s->total_time; |
2c52ddf1 JQ |
497 | info->has_expected_downtime = true; |
498 | info->expected_downtime = s->expected_downtime; | |
ed4fbd10 MH |
499 | info->has_setup_time = true; |
500 | info->setup_time = s->setup_time; | |
17549e84 | 501 | |
791e7c82 LC |
502 | info->has_ram = true; |
503 | info->ram = g_malloc0(sizeof(*info->ram)); | |
504 | info->ram->transferred = ram_bytes_transferred(); | |
505 | info->ram->remaining = ram_bytes_remaining(); | |
506 | info->ram->total = ram_bytes_total(); | |
004d4c10 | 507 | info->ram->duplicate = dup_mig_pages_transferred(); |
f1c72795 | 508 | info->ram->skipped = skipped_mig_pages_transferred(); |
004d4c10 OW |
509 | info->ram->normal = norm_mig_pages_transferred(); |
510 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
8d017193 | 511 | info->ram->dirty_pages_rate = s->dirty_pages_rate; |
7e114f8c | 512 | info->ram->mbps = s->mbps; |
58570ed8 | 513 | info->ram->dirty_sync_count = s->dirty_sync_count; |
8d017193 | 514 | |
17549e84 | 515 | if (blk_mig_active()) { |
791e7c82 LC |
516 | info->has_disk = true; |
517 | info->disk = g_malloc0(sizeof(*info->disk)); | |
518 | info->disk->transferred = blk_mig_bytes_transferred(); | |
519 | info->disk->remaining = blk_mig_bytes_remaining(); | |
520 | info->disk->total = blk_mig_bytes_total(); | |
ff8d81d8 | 521 | } |
f36d55af | 522 | |
4782893e JH |
523 | if (cpu_throttle_active()) { |
524 | info->has_x_cpu_throttle_percentage = true; | |
525 | info->x_cpu_throttle_percentage = cpu_throttle_get_percentage(); | |
526 | } | |
527 | ||
f36d55af | 528 | get_xbzrle_cache_stats(info); |
17549e84 | 529 | break; |
31194731 | 530 | case MIGRATION_STATUS_COMPLETED: |
f36d55af OW |
531 | get_xbzrle_cache_stats(info); |
532 | ||
791e7c82 | 533 | info->has_status = true; |
00c14997 | 534 | info->has_total_time = true; |
7aa939af | 535 | info->total_time = s->total_time; |
9c5a9fcf JQ |
536 | info->has_downtime = true; |
537 | info->downtime = s->downtime; | |
ed4fbd10 MH |
538 | info->has_setup_time = true; |
539 | info->setup_time = s->setup_time; | |
d5f8a570 JQ |
540 | |
541 | info->has_ram = true; | |
542 | info->ram = g_malloc0(sizeof(*info->ram)); | |
543 | info->ram->transferred = ram_bytes_transferred(); | |
544 | info->ram->remaining = 0; | |
545 | info->ram->total = ram_bytes_total(); | |
004d4c10 | 546 | info->ram->duplicate = dup_mig_pages_transferred(); |
f1c72795 | 547 | info->ram->skipped = skipped_mig_pages_transferred(); |
004d4c10 OW |
548 | info->ram->normal = norm_mig_pages_transferred(); |
549 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
7e114f8c | 550 | info->ram->mbps = s->mbps; |
58570ed8 | 551 | info->ram->dirty_sync_count = s->dirty_sync_count; |
17549e84 | 552 | break; |
31194731 | 553 | case MIGRATION_STATUS_FAILED: |
791e7c82 | 554 | info->has_status = true; |
17549e84 | 555 | break; |
31194731 | 556 | case MIGRATION_STATUS_CANCELLED: |
791e7c82 | 557 | info->has_status = true; |
17549e84 | 558 | break; |
5bb7910a | 559 | } |
cde63fbe | 560 | info->status = s->state; |
791e7c82 LC |
561 | |
562 | return info; | |
5bb7910a AL |
563 | } |
564 | ||
00458433 OW |
565 | void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, |
566 | Error **errp) | |
567 | { | |
568 | MigrationState *s = migrate_get_current(); | |
569 | MigrationCapabilityStatusList *cap; | |
570 | ||
f6844b99 | 571 | if (migration_is_setup_or_active(s->state)) { |
c6bd8c70 | 572 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
00458433 OW |
573 | return; |
574 | } | |
575 | ||
576 | for (cap = params; cap; cap = cap->next) { | |
577 | s->enabled_capabilities[cap->value->capability] = cap->value->state; | |
578 | } | |
579 | } | |
580 | ||
85de8323 LL |
581 | void qmp_migrate_set_parameters(bool has_compress_level, |
582 | int64_t compress_level, | |
583 | bool has_compress_threads, | |
584 | int64_t compress_threads, | |
585 | bool has_decompress_threads, | |
1626fee3 JH |
586 | int64_t decompress_threads, |
587 | bool has_x_cpu_throttle_initial, | |
588 | int64_t x_cpu_throttle_initial, | |
589 | bool has_x_cpu_throttle_increment, | |
590 | int64_t x_cpu_throttle_increment, Error **errp) | |
85de8323 LL |
591 | { |
592 | MigrationState *s = migrate_get_current(); | |
593 | ||
594 | if (has_compress_level && (compress_level < 0 || compress_level > 9)) { | |
c6bd8c70 MA |
595 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level", |
596 | "is invalid, it should be in the range of 0 to 9"); | |
85de8323 LL |
597 | return; |
598 | } | |
599 | if (has_compress_threads && | |
600 | (compress_threads < 1 || compress_threads > 255)) { | |
c6bd8c70 MA |
601 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
602 | "compress_threads", | |
603 | "is invalid, it should be in the range of 1 to 255"); | |
85de8323 LL |
604 | return; |
605 | } | |
606 | if (has_decompress_threads && | |
607 | (decompress_threads < 1 || decompress_threads > 255)) { | |
c6bd8c70 MA |
608 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
609 | "decompress_threads", | |
610 | "is invalid, it should be in the range of 1 to 255"); | |
85de8323 LL |
611 | return; |
612 | } | |
1626fee3 JH |
613 | if (has_x_cpu_throttle_initial && |
614 | (x_cpu_throttle_initial < 1 || x_cpu_throttle_initial > 99)) { | |
615 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
616 | "x_cpu_throttle_initial", | |
617 | "an integer in the range of 1 to 99"); | |
618 | } | |
619 | if (has_x_cpu_throttle_increment && | |
620 | (x_cpu_throttle_increment < 1 || x_cpu_throttle_increment > 99)) { | |
621 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
622 | "x_cpu_throttle_increment", | |
623 | "an integer in the range of 1 to 99"); | |
624 | } | |
85de8323 LL |
625 | |
626 | if (has_compress_level) { | |
627 | s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = compress_level; | |
628 | } | |
629 | if (has_compress_threads) { | |
630 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = compress_threads; | |
631 | } | |
632 | if (has_decompress_threads) { | |
633 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = | |
634 | decompress_threads; | |
635 | } | |
1626fee3 JH |
636 | if (has_x_cpu_throttle_initial) { |
637 | s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL] = | |
638 | x_cpu_throttle_initial; | |
639 | } | |
640 | ||
641 | if (has_x_cpu_throttle_increment) { | |
642 | s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT] = | |
643 | x_cpu_throttle_increment; | |
644 | } | |
85de8323 LL |
645 | } |
646 | ||
065e2813 AL |
647 | /* shared migration helpers */ |
648 | ||
51cf4c1a Z |
649 | static void migrate_set_state(MigrationState *s, int old_state, int new_state) |
650 | { | |
a5c17b5f | 651 | if (atomic_cmpxchg(&s->state, old_state, new_state) == old_state) { |
4ba4bc5e | 652 | trace_migrate_set_state(new_state); |
b05dc723 | 653 | migrate_generate_event(new_state); |
51cf4c1a Z |
654 | } |
655 | } | |
656 | ||
bb1fadc4 | 657 | static void migrate_fd_cleanup(void *opaque) |
065e2813 | 658 | { |
bb1fadc4 PB |
659 | MigrationState *s = opaque; |
660 | ||
661 | qemu_bh_delete(s->cleanup_bh); | |
662 | s->cleanup_bh = NULL; | |
663 | ||
065e2813 | 664 | if (s->file) { |
9013dca5 | 665 | trace_migrate_fd_cleanup(); |
404a7c05 PB |
666 | qemu_mutex_unlock_iothread(); |
667 | qemu_thread_join(&s->thread); | |
668 | qemu_mutex_lock_iothread(); | |
669 | ||
8706d2d5 | 670 | migrate_compress_threads_join(); |
6f190a06 PB |
671 | qemu_fclose(s->file); |
672 | s->file = NULL; | |
065e2813 AL |
673 | } |
674 | ||
31194731 | 675 | assert(s->state != MIGRATION_STATUS_ACTIVE); |
7a2c1721 | 676 | |
94f5a437 LL |
677 | if (s->state == MIGRATION_STATUS_CANCELLING) { |
678 | migrate_set_state(s, MIGRATION_STATUS_CANCELLING, | |
679 | MIGRATION_STATUS_CANCELLED); | |
7a2c1721 | 680 | } |
a3fa1d78 PB |
681 | |
682 | notifier_list_notify(&migration_state_notifiers, s); | |
065e2813 AL |
683 | } |
684 | ||
8b6b99b3 | 685 | void migrate_fd_error(MigrationState *s) |
065e2813 | 686 | { |
9013dca5 | 687 | trace_migrate_fd_error(); |
bb1fadc4 | 688 | assert(s->file == NULL); |
7844337d | 689 | migrate_set_state(s, MIGRATION_STATUS_SETUP, MIGRATION_STATUS_FAILED); |
bb1fadc4 | 690 | notifier_list_notify(&migration_state_notifiers, s); |
458cf28e JQ |
691 | } |
692 | ||
0edda1c4 | 693 | static void migrate_fd_cancel(MigrationState *s) |
065e2813 | 694 | { |
6f2b811a | 695 | int old_state ; |
a26ba26e | 696 | QEMUFile *f = migrate_get_current()->file; |
9013dca5 | 697 | trace_migrate_fd_cancel(); |
065e2813 | 698 | |
6f2b811a Z |
699 | do { |
700 | old_state = s->state; | |
f6844b99 | 701 | if (!migration_is_setup_or_active(old_state)) { |
6f2b811a Z |
702 | break; |
703 | } | |
31194731 HZ |
704 | migrate_set_state(s, old_state, MIGRATION_STATUS_CANCELLING); |
705 | } while (s->state != MIGRATION_STATUS_CANCELLING); | |
a26ba26e DDAG |
706 | |
707 | /* | |
708 | * If we're unlucky the migration code might be stuck somewhere in a | |
709 | * send/write while the network has failed and is waiting to timeout; | |
710 | * if we've got shutdown(2) available then we can force it to quit. | |
711 | * The outgoing qemu file gets closed in migrate_fd_cleanup that is | |
712 | * called in a bh, so there is no race against this cancel. | |
713 | */ | |
31194731 | 714 | if (s->state == MIGRATION_STATUS_CANCELLING && f) { |
a26ba26e DDAG |
715 | qemu_file_shutdown(f); |
716 | } | |
065e2813 AL |
717 | } |
718 | ||
99a0db9b GH |
719 | void add_migration_state_change_notifier(Notifier *notify) |
720 | { | |
721 | notifier_list_add(&migration_state_notifiers, notify); | |
722 | } | |
723 | ||
724 | void remove_migration_state_change_notifier(Notifier *notify) | |
725 | { | |
31552529 | 726 | notifier_remove(notify); |
99a0db9b GH |
727 | } |
728 | ||
02edd2e7 | 729 | bool migration_in_setup(MigrationState *s) |
afe2df69 | 730 | { |
31194731 | 731 | return s->state == MIGRATION_STATUS_SETUP; |
afe2df69 GH |
732 | } |
733 | ||
7073693b | 734 | bool migration_has_finished(MigrationState *s) |
99a0db9b | 735 | { |
31194731 | 736 | return s->state == MIGRATION_STATUS_COMPLETED; |
99a0db9b | 737 | } |
0edda1c4 | 738 | |
afe2df69 GH |
739 | bool migration_has_failed(MigrationState *s) |
740 | { | |
31194731 HZ |
741 | return (s->state == MIGRATION_STATUS_CANCELLED || |
742 | s->state == MIGRATION_STATUS_FAILED); | |
afe2df69 GH |
743 | } |
744 | ||
aefeb18b | 745 | MigrationState *migrate_init(const MigrationParams *params) |
0edda1c4 | 746 | { |
17549e84 | 747 | MigrationState *s = migrate_get_current(); |
d0ae46c1 | 748 | int64_t bandwidth_limit = s->bandwidth_limit; |
bbf6da32 | 749 | bool enabled_capabilities[MIGRATION_CAPABILITY_MAX]; |
17ad9b35 | 750 | int64_t xbzrle_cache_size = s->xbzrle_cache_size; |
43c60a81 LL |
751 | int compress_level = s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; |
752 | int compress_thread_count = | |
753 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; | |
754 | int decompress_thread_count = | |
755 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; | |
1626fee3 JH |
756 | int x_cpu_throttle_initial = |
757 | s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL]; | |
758 | int x_cpu_throttle_increment = | |
759 | s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT]; | |
bbf6da32 OW |
760 | |
761 | memcpy(enabled_capabilities, s->enabled_capabilities, | |
762 | sizeof(enabled_capabilities)); | |
0edda1c4 | 763 | |
17549e84 | 764 | memset(s, 0, sizeof(*s)); |
6607ae23 | 765 | s->params = *params; |
bbf6da32 OW |
766 | memcpy(s->enabled_capabilities, enabled_capabilities, |
767 | sizeof(enabled_capabilities)); | |
17ad9b35 | 768 | s->xbzrle_cache_size = xbzrle_cache_size; |
1299c631 | 769 | |
43c60a81 LL |
770 | s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = compress_level; |
771 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = | |
772 | compress_thread_count; | |
773 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = | |
774 | decompress_thread_count; | |
1626fee3 JH |
775 | s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL] = |
776 | x_cpu_throttle_initial; | |
777 | s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT] = | |
778 | x_cpu_throttle_increment; | |
0edda1c4 | 779 | s->bandwidth_limit = bandwidth_limit; |
7844337d | 780 | migrate_set_state(s, MIGRATION_STATUS_NONE, MIGRATION_STATUS_SETUP); |
0edda1c4 | 781 | |
bc72ad67 | 782 | s->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0edda1c4 JQ |
783 | return s; |
784 | } | |
cab30143 | 785 | |
fa2756b7 AL |
786 | static GSList *migration_blockers; |
787 | ||
788 | void migrate_add_blocker(Error *reason) | |
789 | { | |
790 | migration_blockers = g_slist_prepend(migration_blockers, reason); | |
791 | } | |
792 | ||
793 | void migrate_del_blocker(Error *reason) | |
794 | { | |
795 | migration_blockers = g_slist_remove(migration_blockers, reason); | |
796 | } | |
797 | ||
bf1ae1f4 DDAG |
798 | void qmp_migrate_incoming(const char *uri, Error **errp) |
799 | { | |
800 | Error *local_err = NULL; | |
4debb5f5 | 801 | static bool once = true; |
bf1ae1f4 DDAG |
802 | |
803 | if (!deferred_incoming) { | |
4debb5f5 | 804 | error_setg(errp, "For use with '-incoming defer'"); |
bf1ae1f4 DDAG |
805 | return; |
806 | } | |
4debb5f5 DDAG |
807 | if (!once) { |
808 | error_setg(errp, "The incoming migration has already been started"); | |
809 | } | |
bf1ae1f4 DDAG |
810 | |
811 | qemu_start_incoming_migration(uri, &local_err); | |
812 | ||
813 | if (local_err) { | |
814 | error_propagate(errp, local_err); | |
815 | return; | |
816 | } | |
817 | ||
4debb5f5 | 818 | once = false; |
bf1ae1f4 DDAG |
819 | } |
820 | ||
e1c37d0e LC |
821 | void qmp_migrate(const char *uri, bool has_blk, bool blk, |
822 | bool has_inc, bool inc, bool has_detach, bool detach, | |
823 | Error **errp) | |
cab30143 | 824 | { |
be7059cd | 825 | Error *local_err = NULL; |
17549e84 | 826 | MigrationState *s = migrate_get_current(); |
6607ae23 | 827 | MigrationParams params; |
cab30143 | 828 | const char *p; |
cab30143 | 829 | |
8c0426ae PP |
830 | params.blk = has_blk && blk; |
831 | params.shared = has_inc && inc; | |
6607ae23 | 832 | |
f6844b99 | 833 | if (migration_is_setup_or_active(s->state) || |
31194731 | 834 | s->state == MIGRATION_STATUS_CANCELLING) { |
c6bd8c70 | 835 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
e1c37d0e | 836 | return; |
cab30143 | 837 | } |
ca99993a DDAG |
838 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
839 | error_setg(errp, "Guest is waiting for an incoming migration"); | |
840 | return; | |
841 | } | |
842 | ||
e1c37d0e LC |
843 | if (qemu_savevm_state_blocked(errp)) { |
844 | return; | |
cab30143 JQ |
845 | } |
846 | ||
fa2756b7 | 847 | if (migration_blockers) { |
e1c37d0e LC |
848 | *errp = error_copy(migration_blockers->data); |
849 | return; | |
fa2756b7 AL |
850 | } |
851 | ||
656a2334 JQ |
852 | /* We are starting a new migration, so we want to start in a clean |
853 | state. This change is only needed if previous migration | |
854 | failed/was cancelled. We don't use migrate_set_state() because | |
855 | we are setting the initial state, not changing it. */ | |
856 | s->state = MIGRATION_STATUS_NONE; | |
857 | ||
6607ae23 | 858 | s = migrate_init(¶ms); |
cab30143 JQ |
859 | |
860 | if (strstart(uri, "tcp:", &p)) { | |
f37afb5a | 861 | tcp_start_outgoing_migration(s, p, &local_err); |
2da776db | 862 | #ifdef CONFIG_RDMA |
41310c68 | 863 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
864 | rdma_start_outgoing_migration(s, p, &local_err); |
865 | #endif | |
cab30143 JQ |
866 | #if !defined(WIN32) |
867 | } else if (strstart(uri, "exec:", &p)) { | |
f37afb5a | 868 | exec_start_outgoing_migration(s, p, &local_err); |
cab30143 | 869 | } else if (strstart(uri, "unix:", &p)) { |
f37afb5a | 870 | unix_start_outgoing_migration(s, p, &local_err); |
cab30143 | 871 | } else if (strstart(uri, "fd:", &p)) { |
f37afb5a | 872 | fd_start_outgoing_migration(s, p, &local_err); |
cab30143 | 873 | #endif |
99a0db9b | 874 | } else { |
c6bd8c70 MA |
875 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "uri", |
876 | "a valid migration protocol"); | |
7844337d | 877 | migrate_set_state(s, MIGRATION_STATUS_SETUP, MIGRATION_STATUS_FAILED); |
e1c37d0e | 878 | return; |
cab30143 JQ |
879 | } |
880 | ||
f37afb5a | 881 | if (local_err) { |
342ab8d1 | 882 | migrate_fd_error(s); |
f37afb5a | 883 | error_propagate(errp, local_err); |
e1c37d0e | 884 | return; |
1299c631 | 885 | } |
cab30143 JQ |
886 | } |
887 | ||
6cdedb07 | 888 | void qmp_migrate_cancel(Error **errp) |
cab30143 | 889 | { |
17549e84 | 890 | migrate_fd_cancel(migrate_get_current()); |
cab30143 JQ |
891 | } |
892 | ||
9e1ba4cc OW |
893 | void qmp_migrate_set_cache_size(int64_t value, Error **errp) |
894 | { | |
895 | MigrationState *s = migrate_get_current(); | |
c91e681a | 896 | int64_t new_size; |
9e1ba4cc OW |
897 | |
898 | /* Check for truncation */ | |
899 | if (value != (size_t)value) { | |
c6bd8c70 MA |
900 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
901 | "exceeding address space"); | |
9e1ba4cc OW |
902 | return; |
903 | } | |
904 | ||
a5615b14 OW |
905 | /* Cache should not be larger than guest ram size */ |
906 | if (value > ram_bytes_total()) { | |
c6bd8c70 MA |
907 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
908 | "exceeds guest ram size "); | |
a5615b14 OW |
909 | return; |
910 | } | |
911 | ||
c91e681a OW |
912 | new_size = xbzrle_cache_resize(value); |
913 | if (new_size < 0) { | |
c6bd8c70 MA |
914 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
915 | "is smaller than page size"); | |
c91e681a OW |
916 | return; |
917 | } | |
918 | ||
919 | s->xbzrle_cache_size = new_size; | |
9e1ba4cc OW |
920 | } |
921 | ||
922 | int64_t qmp_query_migrate_cache_size(Error **errp) | |
923 | { | |
924 | return migrate_xbzrle_cache_size(); | |
925 | } | |
926 | ||
3dc85383 | 927 | void qmp_migrate_set_speed(int64_t value, Error **errp) |
cab30143 | 928 | { |
cab30143 JQ |
929 | MigrationState *s; |
930 | ||
3dc85383 LC |
931 | if (value < 0) { |
932 | value = 0; | |
99a0db9b | 933 | } |
442773ce PB |
934 | if (value > SIZE_MAX) { |
935 | value = SIZE_MAX; | |
936 | } | |
cab30143 | 937 | |
17549e84 | 938 | s = migrate_get_current(); |
3dc85383 | 939 | s->bandwidth_limit = value; |
442773ce PB |
940 | if (s->file) { |
941 | qemu_file_set_rate_limit(s->file, s->bandwidth_limit / XFER_LIMIT_RATIO); | |
942 | } | |
cab30143 JQ |
943 | } |
944 | ||
4f0a993b | 945 | void qmp_migrate_set_downtime(double value, Error **errp) |
cab30143 | 946 | { |
4f0a993b LC |
947 | value *= 1e9; |
948 | value = MAX(0, MIN(UINT64_MAX, value)); | |
949 | max_downtime = (uint64_t)value; | |
99a0db9b | 950 | } |
17ad9b35 | 951 | |
bde1e2ec CV |
952 | bool migrate_auto_converge(void) |
953 | { | |
954 | MigrationState *s; | |
955 | ||
956 | s = migrate_get_current(); | |
957 | ||
958 | return s->enabled_capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; | |
959 | } | |
960 | ||
323004a3 PL |
961 | bool migrate_zero_blocks(void) |
962 | { | |
963 | MigrationState *s; | |
964 | ||
965 | s = migrate_get_current(); | |
966 | ||
967 | return s->enabled_capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS]; | |
968 | } | |
969 | ||
8706d2d5 LL |
970 | bool migrate_use_compression(void) |
971 | { | |
dde4e694 LL |
972 | MigrationState *s; |
973 | ||
974 | s = migrate_get_current(); | |
975 | ||
976 | return s->enabled_capabilities[MIGRATION_CAPABILITY_COMPRESS]; | |
8706d2d5 LL |
977 | } |
978 | ||
979 | int migrate_compress_level(void) | |
980 | { | |
981 | MigrationState *s; | |
982 | ||
983 | s = migrate_get_current(); | |
984 | ||
43c60a81 | 985 | return s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; |
8706d2d5 LL |
986 | } |
987 | ||
988 | int migrate_compress_threads(void) | |
989 | { | |
990 | MigrationState *s; | |
991 | ||
992 | s = migrate_get_current(); | |
993 | ||
43c60a81 | 994 | return s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; |
8706d2d5 LL |
995 | } |
996 | ||
3fcb38c2 LL |
997 | int migrate_decompress_threads(void) |
998 | { | |
999 | MigrationState *s; | |
1000 | ||
1001 | s = migrate_get_current(); | |
1002 | ||
43c60a81 | 1003 | return s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; |
3fcb38c2 LL |
1004 | } |
1005 | ||
b05dc723 JQ |
1006 | bool migrate_use_events(void) |
1007 | { | |
1008 | MigrationState *s; | |
1009 | ||
1010 | s = migrate_get_current(); | |
1011 | ||
1012 | return s->enabled_capabilities[MIGRATION_CAPABILITY_EVENTS]; | |
1013 | } | |
1014 | ||
17ad9b35 OW |
1015 | int migrate_use_xbzrle(void) |
1016 | { | |
1017 | MigrationState *s; | |
1018 | ||
1019 | s = migrate_get_current(); | |
1020 | ||
1021 | return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE]; | |
1022 | } | |
1023 | ||
1024 | int64_t migrate_xbzrle_cache_size(void) | |
1025 | { | |
1026 | MigrationState *s; | |
1027 | ||
1028 | s = migrate_get_current(); | |
1029 | ||
1030 | return s->xbzrle_cache_size; | |
1031 | } | |
0d82d0e8 | 1032 | |
09f6c85e DDAG |
1033 | /** |
1034 | * migration_completion: Used by migration_thread when there's not much left. | |
1035 | * The caller 'breaks' the loop when this returns. | |
1036 | * | |
1037 | * @s: Current migration state | |
1038 | * @*old_vm_running: Pointer to old_vm_running flag | |
1039 | * @*start_time: Pointer to time to update | |
1040 | */ | |
1041 | static void migration_completion(MigrationState *s, bool *old_vm_running, | |
1042 | int64_t *start_time) | |
1043 | { | |
1044 | int ret; | |
1045 | ||
1046 | qemu_mutex_lock_iothread(); | |
1047 | *start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); | |
1048 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER); | |
1049 | *old_vm_running = runstate_is_running(); | |
1050 | ||
1051 | ret = global_state_store(); | |
1052 | if (!ret) { | |
1053 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); | |
1054 | if (ret >= 0) { | |
1055 | qemu_file_set_rate_limit(s->file, INT64_MAX); | |
a3e06c3d | 1056 | qemu_savevm_state_complete_precopy(s->file); |
09f6c85e DDAG |
1057 | } |
1058 | } | |
1059 | qemu_mutex_unlock_iothread(); | |
1060 | ||
1061 | if (ret < 0) { | |
1062 | goto fail; | |
1063 | } | |
1064 | ||
1065 | if (qemu_file_get_error(s->file)) { | |
1066 | trace_migration_completion_file_err(); | |
1067 | goto fail; | |
1068 | } | |
1069 | ||
1070 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, MIGRATION_STATUS_COMPLETED); | |
1071 | return; | |
1072 | ||
1073 | fail: | |
1074 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, MIGRATION_STATUS_FAILED); | |
1075 | } | |
1076 | ||
0d82d0e8 JQ |
1077 | /* migration thread support */ |
1078 | ||
5f496a1b | 1079 | static void *migration_thread(void *opaque) |
0d82d0e8 | 1080 | { |
9848a404 | 1081 | MigrationState *s = opaque; |
bc72ad67 AB |
1082 | int64_t initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
1083 | int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST); | |
be7172e2 | 1084 | int64_t initial_bytes = 0; |
0d82d0e8 | 1085 | int64_t max_size = 0; |
a3fa1d78 | 1086 | int64_t start_time = initial_time; |
94f5a437 | 1087 | int64_t end_time; |
a3fa1d78 | 1088 | bool old_vm_running = false; |
76f5933a | 1089 | |
ab28bd23 PB |
1090 | rcu_register_thread(); |
1091 | ||
f796baa1 | 1092 | qemu_savevm_state_header(s->file); |
dba433c0 | 1093 | qemu_savevm_state_begin(s->file, &s->params); |
0d82d0e8 | 1094 | |
bc72ad67 | 1095 | s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start; |
31194731 | 1096 | migrate_set_state(s, MIGRATION_STATUS_SETUP, MIGRATION_STATUS_ACTIVE); |
29ae8a41 | 1097 | |
31194731 | 1098 | while (s->state == MIGRATION_STATUS_ACTIVE) { |
a3e879cd | 1099 | int64_t current_time; |
c369f40d | 1100 | uint64_t pending_size; |
0d82d0e8 | 1101 | |
a0ff044b | 1102 | if (!qemu_file_rate_limit(s->file)) { |
c369f40d | 1103 | pending_size = qemu_savevm_state_pending(s->file, max_size); |
9013dca5 | 1104 | trace_migrate_pending(pending_size, max_size); |
b22ff1fb | 1105 | if (pending_size && pending_size >= max_size) { |
dba433c0 | 1106 | qemu_savevm_state_iterate(s->file); |
c369f40d | 1107 | } else { |
09f6c85e DDAG |
1108 | trace_migration_thread_low_pending(pending_size); |
1109 | migration_completion(s, &old_vm_running, &start_time); | |
1110 | break; | |
c369f40d JQ |
1111 | } |
1112 | } | |
f4410a5d | 1113 | |
fd45ee2c | 1114 | if (qemu_file_get_error(s->file)) { |
31194731 HZ |
1115 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
1116 | MIGRATION_STATUS_FAILED); | |
fd45ee2c PB |
1117 | break; |
1118 | } | |
bc72ad67 | 1119 | current_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0d82d0e8 | 1120 | if (current_time >= initial_time + BUFFER_DELAY) { |
be7172e2 | 1121 | uint64_t transferred_bytes = qemu_ftell(s->file) - initial_bytes; |
77417f10 | 1122 | uint64_t time_spent = current_time - initial_time; |
0d82d0e8 JQ |
1123 | double bandwidth = transferred_bytes / time_spent; |
1124 | max_size = bandwidth * migrate_max_downtime() / 1000000; | |
1125 | ||
7e114f8c MH |
1126 | s->mbps = time_spent ? (((double) transferred_bytes * 8.0) / |
1127 | ((double) time_spent / 1000.0)) / 1000.0 / 1000.0 : -1; | |
1128 | ||
9013dca5 AK |
1129 | trace_migrate_transferred(transferred_bytes, time_spent, |
1130 | bandwidth, max_size); | |
90f8ae72 JQ |
1131 | /* if we haven't sent anything, we don't want to recalculate |
1132 | 10000 is a small enough number for our purposes */ | |
1133 | if (s->dirty_bytes_rate && transferred_bytes > 10000) { | |
1134 | s->expected_downtime = s->dirty_bytes_rate / bandwidth; | |
1135 | } | |
0d82d0e8 | 1136 | |
1964a397 | 1137 | qemu_file_reset_rate_limit(s->file); |
0d82d0e8 | 1138 | initial_time = current_time; |
be7172e2 | 1139 | initial_bytes = qemu_ftell(s->file); |
0d82d0e8 | 1140 | } |
a0ff044b | 1141 | if (qemu_file_rate_limit(s->file)) { |
0d82d0e8 JQ |
1142 | /* usleep expects microseconds */ |
1143 | g_usleep((initial_time + BUFFER_DELAY - current_time)*1000); | |
1144 | } | |
a3fa1d78 PB |
1145 | } |
1146 | ||
070afca2 JH |
1147 | /* If we enabled cpu throttling for auto-converge, turn it off. */ |
1148 | cpu_throttle_stop(); | |
94f5a437 | 1149 | end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
070afca2 | 1150 | |
f4410a5d | 1151 | qemu_mutex_lock_iothread(); |
ea7415fa | 1152 | qemu_savevm_state_cleanup(); |
31194731 | 1153 | if (s->state == MIGRATION_STATUS_COMPLETED) { |
d6ed7312 | 1154 | uint64_t transferred_bytes = qemu_ftell(s->file); |
a3fa1d78 PB |
1155 | s->total_time = end_time - s->total_time; |
1156 | s->downtime = end_time - start_time; | |
d6ed7312 PL |
1157 | if (s->total_time) { |
1158 | s->mbps = (((double) transferred_bytes * 8.0) / | |
1159 | ((double) s->total_time)) / 1000; | |
1160 | } | |
a3fa1d78 PB |
1161 | runstate_set(RUN_STATE_POSTMIGRATE); |
1162 | } else { | |
1163 | if (old_vm_running) { | |
a3fa1d78 | 1164 | vm_start(); |
dba433c0 | 1165 | } |
0d82d0e8 | 1166 | } |
bb1fadc4 | 1167 | qemu_bh_schedule(s->cleanup_bh); |
dba433c0 | 1168 | qemu_mutex_unlock_iothread(); |
f4410a5d | 1169 | |
ab28bd23 | 1170 | rcu_unregister_thread(); |
0d82d0e8 JQ |
1171 | return NULL; |
1172 | } | |
1173 | ||
9848a404 | 1174 | void migrate_fd_connect(MigrationState *s) |
0d82d0e8 | 1175 | { |
cc283e3b JQ |
1176 | /* This is a best 1st approximation. ns to ms */ |
1177 | s->expected_downtime = max_downtime/1000000; | |
bb1fadc4 | 1178 | s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s); |
0d82d0e8 | 1179 | |
442773ce PB |
1180 | qemu_file_set_rate_limit(s->file, |
1181 | s->bandwidth_limit / XFER_LIMIT_RATIO); | |
1182 | ||
9287ac27 SH |
1183 | /* Notify before starting migration thread */ |
1184 | notifier_list_notify(&migration_state_notifiers, s); | |
1185 | ||
8706d2d5 | 1186 | migrate_compress_threads_create(); |
4900116e | 1187 | qemu_thread_create(&s->thread, "migration", migration_thread, s, |
bb1fadc4 | 1188 | QEMU_THREAD_JOINABLE); |
0d82d0e8 | 1189 | } |