]>
Commit | Line | Data |
---|---|---|
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" | |
6a1751b7 | 17 | #include "qemu/main-loop.h" |
caf71f86 | 18 | #include "migration/migration.h" |
83c9089e | 19 | #include "monitor/monitor.h" |
0d82d0e8 | 20 | #include "migration/qemu-file.h" |
9c17d615 | 21 | #include "sysemu/sysemu.h" |
737e150e | 22 | #include "block/block.h" |
1de7afc9 | 23 | #include "qemu/sockets.h" |
caf71f86 | 24 | #include "migration/block.h" |
766bd176 | 25 | #include "qemu/thread.h" |
791e7c82 | 26 | #include "qmp-commands.h" |
c09e5bb1 | 27 | #include "trace.h" |
065e2813 | 28 | |
d0ae46c1 | 29 | #define MAX_THROTTLE (32 << 20) /* Migration speed throttling */ |
5bb7910a | 30 | |
5b4e1eb7 JQ |
31 | /* Amount of time to allocate to each "chunk" of bandwidth-throttled |
32 | * data. */ | |
33 | #define BUFFER_DELAY 100 | |
34 | #define XFER_LIMIT_RATIO (1000 / BUFFER_DELAY) | |
35 | ||
17ad9b35 OW |
36 | /* Migration XBZRLE default cache size */ |
37 | #define DEFAULT_MIGRATE_CACHE_SIZE (64 * 1024 * 1024) | |
38 | ||
99a0db9b GH |
39 | static NotifierList migration_state_notifiers = |
40 | NOTIFIER_LIST_INITIALIZER(migration_state_notifiers); | |
41 | ||
adde220a DDAG |
42 | static bool deferred_incoming; |
43 | ||
17549e84 JQ |
44 | /* When we add fault tolerance, we could have several |
45 | migrations at once. For now we don't need to add | |
46 | dynamic creation of migration */ | |
47 | ||
859bc756 | 48 | MigrationState *migrate_get_current(void) |
17549e84 JQ |
49 | { |
50 | static MigrationState current_migration = { | |
31194731 | 51 | .state = MIGRATION_STATUS_NONE, |
d0ae46c1 | 52 | .bandwidth_limit = MAX_THROTTLE, |
17ad9b35 | 53 | .xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE, |
7e114f8c | 54 | .mbps = -1, |
17549e84 JQ |
55 | }; |
56 | ||
57 | return ¤t_migration; | |
58 | } | |
59 | ||
adde220a DDAG |
60 | /* |
61 | * Called on -incoming with a defer: uri. | |
62 | * The migration can be started later after any parameters have been | |
63 | * changed. | |
64 | */ | |
65 | static void deferred_incoming_migration(Error **errp) | |
66 | { | |
67 | if (deferred_incoming) { | |
68 | error_setg(errp, "Incoming migration already deferred"); | |
69 | } | |
70 | deferred_incoming = true; | |
71 | } | |
72 | ||
43eaae28 | 73 | void qemu_start_incoming_migration(const char *uri, Error **errp) |
5bb7910a | 74 | { |
34c9dd8e AL |
75 | const char *p; |
76 | ||
adde220a DDAG |
77 | if (!strcmp(uri, "defer")) { |
78 | deferred_incoming_migration(errp); | |
79 | } else if (strstart(uri, "tcp:", &p)) { | |
43eaae28 | 80 | tcp_start_incoming_migration(p, errp); |
2da776db | 81 | #ifdef CONFIG_RDMA |
adde220a | 82 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
83 | rdma_start_incoming_migration(p, errp); |
84 | #endif | |
065e2813 | 85 | #if !defined(WIN32) |
adde220a | 86 | } else if (strstart(uri, "exec:", &p)) { |
43eaae28 | 87 | exec_start_incoming_migration(p, errp); |
adde220a | 88 | } else if (strstart(uri, "unix:", &p)) { |
43eaae28 | 89 | unix_start_incoming_migration(p, errp); |
adde220a | 90 | } else if (strstart(uri, "fd:", &p)) { |
43eaae28 | 91 | fd_start_incoming_migration(p, errp); |
065e2813 | 92 | #endif |
adde220a | 93 | } else { |
312fd5f2 | 94 | error_setg(errp, "unknown migration protocol: %s", uri); |
8ca5e801 | 95 | } |
5bb7910a AL |
96 | } |
97 | ||
82a4da79 | 98 | static void process_incoming_migration_co(void *opaque) |
511c0231 | 99 | { |
82a4da79 | 100 | QEMUFile *f = opaque; |
5a8a30db | 101 | Error *local_err = NULL; |
1c12e1f5 PB |
102 | int ret; |
103 | ||
104 | ret = qemu_loadvm_state(f); | |
105 | qemu_fclose(f); | |
905f26f2 | 106 | free_xbzrle_decoded_buf(); |
1c12e1f5 | 107 | if (ret < 0) { |
db80face | 108 | error_report("load of migration failed: %s", strerror(-ret)); |
4aead692 | 109 | exit(EXIT_FAILURE); |
511c0231 JQ |
110 | } |
111 | qemu_announce_self(); | |
511c0231 | 112 | |
0f15423c | 113 | /* Make sure all file formats flush their mutable metadata */ |
5a8a30db KW |
114 | bdrv_invalidate_cache_all(&local_err); |
115 | if (local_err) { | |
97baf9d9 | 116 | error_report_err(local_err); |
5a8a30db KW |
117 | exit(EXIT_FAILURE); |
118 | } | |
0f15423c | 119 | |
f5bbfba1 | 120 | if (autostart) { |
511c0231 | 121 | vm_start(); |
f5bbfba1 | 122 | } else { |
29ed72f1 | 123 | runstate_set(RUN_STATE_PAUSED); |
f5bbfba1 | 124 | } |
511c0231 JQ |
125 | } |
126 | ||
82a4da79 PB |
127 | void process_incoming_migration(QEMUFile *f) |
128 | { | |
129 | Coroutine *co = qemu_coroutine_create(process_incoming_migration_co); | |
130 | int fd = qemu_get_fd(f); | |
131 | ||
132 | assert(fd != -1); | |
f9e8cacc | 133 | qemu_set_nonblock(fd); |
82a4da79 PB |
134 | qemu_coroutine_enter(co, f); |
135 | } | |
136 | ||
a0a3fd60 GC |
137 | /* amount of nanoseconds we are willing to wait for migration to be down. |
138 | * the choice of nanoseconds is because it is the maximum resolution that | |
139 | * get_clock() can achieve. It is an internal measure. All user-visible | |
140 | * units must be in seconds */ | |
f7cd55a0 | 141 | static uint64_t max_downtime = 300000000; |
a0a3fd60 GC |
142 | |
143 | uint64_t migrate_max_downtime(void) | |
144 | { | |
145 | return max_downtime; | |
146 | } | |
147 | ||
bbf6da32 OW |
148 | MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) |
149 | { | |
150 | MigrationCapabilityStatusList *head = NULL; | |
151 | MigrationCapabilityStatusList *caps; | |
152 | MigrationState *s = migrate_get_current(); | |
153 | int i; | |
154 | ||
387eedeb | 155 | caps = NULL; /* silence compiler warning */ |
bbf6da32 OW |
156 | for (i = 0; i < MIGRATION_CAPABILITY_MAX; i++) { |
157 | if (head == NULL) { | |
158 | head = g_malloc0(sizeof(*caps)); | |
159 | caps = head; | |
160 | } else { | |
161 | caps->next = g_malloc0(sizeof(*caps)); | |
162 | caps = caps->next; | |
163 | } | |
164 | caps->value = | |
165 | g_malloc(sizeof(*caps->value)); | |
166 | caps->value->capability = i; | |
167 | caps->value->state = s->enabled_capabilities[i]; | |
168 | } | |
169 | ||
170 | return head; | |
171 | } | |
172 | ||
f36d55af OW |
173 | static void get_xbzrle_cache_stats(MigrationInfo *info) |
174 | { | |
175 | if (migrate_use_xbzrle()) { | |
176 | info->has_xbzrle_cache = true; | |
177 | info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache)); | |
178 | info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size(); | |
179 | info->xbzrle_cache->bytes = xbzrle_mig_bytes_transferred(); | |
180 | info->xbzrle_cache->pages = xbzrle_mig_pages_transferred(); | |
181 | info->xbzrle_cache->cache_miss = xbzrle_mig_pages_cache_miss(); | |
8bc39233 | 182 | info->xbzrle_cache->cache_miss_rate = xbzrle_mig_cache_miss_rate(); |
f36d55af OW |
183 | info->xbzrle_cache->overflow = xbzrle_mig_pages_overflow(); |
184 | } | |
185 | } | |
186 | ||
791e7c82 | 187 | MigrationInfo *qmp_query_migrate(Error **errp) |
5bb7910a | 188 | { |
791e7c82 | 189 | MigrationInfo *info = g_malloc0(sizeof(*info)); |
17549e84 JQ |
190 | MigrationState *s = migrate_get_current(); |
191 | ||
192 | switch (s->state) { | |
31194731 | 193 | case MIGRATION_STATUS_NONE: |
17549e84 JQ |
194 | /* no migration has happened ever */ |
195 | break; | |
31194731 | 196 | case MIGRATION_STATUS_SETUP: |
29ae8a41 | 197 | info->has_status = true; |
24b8c39b | 198 | info->status = MIGRATION_STATUS_SETUP; |
ed4fbd10 | 199 | info->has_total_time = false; |
29ae8a41 | 200 | break; |
31194731 HZ |
201 | case MIGRATION_STATUS_ACTIVE: |
202 | case MIGRATION_STATUS_CANCELLING: | |
791e7c82 | 203 | info->has_status = true; |
24b8c39b | 204 | info->status = MIGRATION_STATUS_ACTIVE; |
7aa939af | 205 | info->has_total_time = true; |
bc72ad67 | 206 | info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) |
7aa939af | 207 | - s->total_time; |
2c52ddf1 JQ |
208 | info->has_expected_downtime = true; |
209 | info->expected_downtime = s->expected_downtime; | |
ed4fbd10 MH |
210 | info->has_setup_time = true; |
211 | info->setup_time = s->setup_time; | |
17549e84 | 212 | |
791e7c82 LC |
213 | info->has_ram = true; |
214 | info->ram = g_malloc0(sizeof(*info->ram)); | |
215 | info->ram->transferred = ram_bytes_transferred(); | |
216 | info->ram->remaining = ram_bytes_remaining(); | |
217 | info->ram->total = ram_bytes_total(); | |
004d4c10 | 218 | info->ram->duplicate = dup_mig_pages_transferred(); |
f1c72795 | 219 | info->ram->skipped = skipped_mig_pages_transferred(); |
004d4c10 OW |
220 | info->ram->normal = norm_mig_pages_transferred(); |
221 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
8d017193 | 222 | info->ram->dirty_pages_rate = s->dirty_pages_rate; |
7e114f8c | 223 | info->ram->mbps = s->mbps; |
58570ed8 | 224 | info->ram->dirty_sync_count = s->dirty_sync_count; |
8d017193 | 225 | |
17549e84 | 226 | if (blk_mig_active()) { |
791e7c82 LC |
227 | info->has_disk = true; |
228 | info->disk = g_malloc0(sizeof(*info->disk)); | |
229 | info->disk->transferred = blk_mig_bytes_transferred(); | |
230 | info->disk->remaining = blk_mig_bytes_remaining(); | |
231 | info->disk->total = blk_mig_bytes_total(); | |
ff8d81d8 | 232 | } |
f36d55af OW |
233 | |
234 | get_xbzrle_cache_stats(info); | |
17549e84 | 235 | break; |
31194731 | 236 | case MIGRATION_STATUS_COMPLETED: |
f36d55af OW |
237 | get_xbzrle_cache_stats(info); |
238 | ||
791e7c82 | 239 | info->has_status = true; |
24b8c39b | 240 | info->status = MIGRATION_STATUS_COMPLETED; |
00c14997 | 241 | info->has_total_time = true; |
7aa939af | 242 | info->total_time = s->total_time; |
9c5a9fcf JQ |
243 | info->has_downtime = true; |
244 | info->downtime = s->downtime; | |
ed4fbd10 MH |
245 | info->has_setup_time = true; |
246 | info->setup_time = s->setup_time; | |
d5f8a570 JQ |
247 | |
248 | info->has_ram = true; | |
249 | info->ram = g_malloc0(sizeof(*info->ram)); | |
250 | info->ram->transferred = ram_bytes_transferred(); | |
251 | info->ram->remaining = 0; | |
252 | info->ram->total = ram_bytes_total(); | |
004d4c10 | 253 | info->ram->duplicate = dup_mig_pages_transferred(); |
f1c72795 | 254 | info->ram->skipped = skipped_mig_pages_transferred(); |
004d4c10 OW |
255 | info->ram->normal = norm_mig_pages_transferred(); |
256 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
7e114f8c | 257 | info->ram->mbps = s->mbps; |
58570ed8 | 258 | info->ram->dirty_sync_count = s->dirty_sync_count; |
17549e84 | 259 | break; |
31194731 | 260 | case MIGRATION_STATUS_FAILED: |
791e7c82 | 261 | info->has_status = true; |
24b8c39b | 262 | info->status = MIGRATION_STATUS_FAILED; |
17549e84 | 263 | break; |
31194731 | 264 | case MIGRATION_STATUS_CANCELLED: |
791e7c82 | 265 | info->has_status = true; |
24b8c39b | 266 | info->status = MIGRATION_STATUS_CANCELLED; |
17549e84 | 267 | break; |
5bb7910a | 268 | } |
791e7c82 LC |
269 | |
270 | return info; | |
5bb7910a AL |
271 | } |
272 | ||
00458433 OW |
273 | void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, |
274 | Error **errp) | |
275 | { | |
276 | MigrationState *s = migrate_get_current(); | |
277 | MigrationCapabilityStatusList *cap; | |
278 | ||
31194731 HZ |
279 | if (s->state == MIGRATION_STATUS_ACTIVE || |
280 | s->state == MIGRATION_STATUS_SETUP) { | |
00458433 OW |
281 | error_set(errp, QERR_MIGRATION_ACTIVE); |
282 | return; | |
283 | } | |
284 | ||
285 | for (cap = params; cap; cap = cap->next) { | |
286 | s->enabled_capabilities[cap->value->capability] = cap->value->state; | |
287 | } | |
288 | } | |
289 | ||
065e2813 AL |
290 | /* shared migration helpers */ |
291 | ||
51cf4c1a Z |
292 | static void migrate_set_state(MigrationState *s, int old_state, int new_state) |
293 | { | |
294 | if (atomic_cmpxchg(&s->state, old_state, new_state) == new_state) { | |
295 | trace_migrate_set_state(new_state); | |
296 | } | |
297 | } | |
298 | ||
bb1fadc4 | 299 | static void migrate_fd_cleanup(void *opaque) |
065e2813 | 300 | { |
bb1fadc4 PB |
301 | MigrationState *s = opaque; |
302 | ||
303 | qemu_bh_delete(s->cleanup_bh); | |
304 | s->cleanup_bh = NULL; | |
305 | ||
065e2813 | 306 | if (s->file) { |
9013dca5 | 307 | trace_migrate_fd_cleanup(); |
404a7c05 PB |
308 | qemu_mutex_unlock_iothread(); |
309 | qemu_thread_join(&s->thread); | |
310 | qemu_mutex_lock_iothread(); | |
311 | ||
6f190a06 PB |
312 | qemu_fclose(s->file); |
313 | s->file = NULL; | |
065e2813 AL |
314 | } |
315 | ||
31194731 | 316 | assert(s->state != MIGRATION_STATUS_ACTIVE); |
7a2c1721 | 317 | |
31194731 | 318 | if (s->state != MIGRATION_STATUS_COMPLETED) { |
7a2c1721 | 319 | qemu_savevm_state_cancel(); |
31194731 HZ |
320 | if (s->state == MIGRATION_STATUS_CANCELLING) { |
321 | migrate_set_state(s, MIGRATION_STATUS_CANCELLING, | |
322 | MIGRATION_STATUS_CANCELLED); | |
51cf4c1a | 323 | } |
7a2c1721 | 324 | } |
a3fa1d78 PB |
325 | |
326 | notifier_list_notify(&migration_state_notifiers, s); | |
065e2813 AL |
327 | } |
328 | ||
8b6b99b3 | 329 | void migrate_fd_error(MigrationState *s) |
065e2813 | 330 | { |
9013dca5 | 331 | trace_migrate_fd_error(); |
bb1fadc4 | 332 | assert(s->file == NULL); |
31194731 HZ |
333 | s->state = MIGRATION_STATUS_FAILED; |
334 | trace_migrate_set_state(MIGRATION_STATUS_FAILED); | |
bb1fadc4 | 335 | notifier_list_notify(&migration_state_notifiers, s); |
458cf28e JQ |
336 | } |
337 | ||
0edda1c4 | 338 | static void migrate_fd_cancel(MigrationState *s) |
065e2813 | 339 | { |
6f2b811a | 340 | int old_state ; |
a26ba26e | 341 | QEMUFile *f = migrate_get_current()->file; |
9013dca5 | 342 | trace_migrate_fd_cancel(); |
065e2813 | 343 | |
6f2b811a Z |
344 | do { |
345 | old_state = s->state; | |
31194731 HZ |
346 | if (old_state != MIGRATION_STATUS_SETUP && |
347 | old_state != MIGRATION_STATUS_ACTIVE) { | |
6f2b811a Z |
348 | break; |
349 | } | |
31194731 HZ |
350 | migrate_set_state(s, old_state, MIGRATION_STATUS_CANCELLING); |
351 | } while (s->state != MIGRATION_STATUS_CANCELLING); | |
a26ba26e DDAG |
352 | |
353 | /* | |
354 | * If we're unlucky the migration code might be stuck somewhere in a | |
355 | * send/write while the network has failed and is waiting to timeout; | |
356 | * if we've got shutdown(2) available then we can force it to quit. | |
357 | * The outgoing qemu file gets closed in migrate_fd_cleanup that is | |
358 | * called in a bh, so there is no race against this cancel. | |
359 | */ | |
31194731 | 360 | if (s->state == MIGRATION_STATUS_CANCELLING && f) { |
a26ba26e DDAG |
361 | qemu_file_shutdown(f); |
362 | } | |
065e2813 AL |
363 | } |
364 | ||
99a0db9b GH |
365 | void add_migration_state_change_notifier(Notifier *notify) |
366 | { | |
367 | notifier_list_add(&migration_state_notifiers, notify); | |
368 | } | |
369 | ||
370 | void remove_migration_state_change_notifier(Notifier *notify) | |
371 | { | |
31552529 | 372 | notifier_remove(notify); |
99a0db9b GH |
373 | } |
374 | ||
02edd2e7 | 375 | bool migration_in_setup(MigrationState *s) |
afe2df69 | 376 | { |
31194731 | 377 | return s->state == MIGRATION_STATUS_SETUP; |
afe2df69 GH |
378 | } |
379 | ||
7073693b | 380 | bool migration_has_finished(MigrationState *s) |
99a0db9b | 381 | { |
31194731 | 382 | return s->state == MIGRATION_STATUS_COMPLETED; |
99a0db9b | 383 | } |
0edda1c4 | 384 | |
afe2df69 GH |
385 | bool migration_has_failed(MigrationState *s) |
386 | { | |
31194731 HZ |
387 | return (s->state == MIGRATION_STATUS_CANCELLED || |
388 | s->state == MIGRATION_STATUS_FAILED); | |
afe2df69 GH |
389 | } |
390 | ||
6607ae23 | 391 | static MigrationState *migrate_init(const MigrationParams *params) |
0edda1c4 | 392 | { |
17549e84 | 393 | MigrationState *s = migrate_get_current(); |
d0ae46c1 | 394 | int64_t bandwidth_limit = s->bandwidth_limit; |
bbf6da32 | 395 | bool enabled_capabilities[MIGRATION_CAPABILITY_MAX]; |
17ad9b35 | 396 | int64_t xbzrle_cache_size = s->xbzrle_cache_size; |
bbf6da32 OW |
397 | |
398 | memcpy(enabled_capabilities, s->enabled_capabilities, | |
399 | sizeof(enabled_capabilities)); | |
0edda1c4 | 400 | |
17549e84 | 401 | memset(s, 0, sizeof(*s)); |
6607ae23 | 402 | s->params = *params; |
bbf6da32 OW |
403 | memcpy(s->enabled_capabilities, enabled_capabilities, |
404 | sizeof(enabled_capabilities)); | |
17ad9b35 | 405 | s->xbzrle_cache_size = xbzrle_cache_size; |
1299c631 | 406 | |
0edda1c4 | 407 | s->bandwidth_limit = bandwidth_limit; |
31194731 HZ |
408 | s->state = MIGRATION_STATUS_SETUP; |
409 | trace_migrate_set_state(MIGRATION_STATUS_SETUP); | |
0edda1c4 | 410 | |
bc72ad67 | 411 | s->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0edda1c4 JQ |
412 | return s; |
413 | } | |
cab30143 | 414 | |
fa2756b7 AL |
415 | static GSList *migration_blockers; |
416 | ||
417 | void migrate_add_blocker(Error *reason) | |
418 | { | |
419 | migration_blockers = g_slist_prepend(migration_blockers, reason); | |
420 | } | |
421 | ||
422 | void migrate_del_blocker(Error *reason) | |
423 | { | |
424 | migration_blockers = g_slist_remove(migration_blockers, reason); | |
425 | } | |
426 | ||
bf1ae1f4 DDAG |
427 | void qmp_migrate_incoming(const char *uri, Error **errp) |
428 | { | |
429 | Error *local_err = NULL; | |
4debb5f5 | 430 | static bool once = true; |
bf1ae1f4 DDAG |
431 | |
432 | if (!deferred_incoming) { | |
4debb5f5 | 433 | error_setg(errp, "For use with '-incoming defer'"); |
bf1ae1f4 DDAG |
434 | return; |
435 | } | |
4debb5f5 DDAG |
436 | if (!once) { |
437 | error_setg(errp, "The incoming migration has already been started"); | |
438 | } | |
bf1ae1f4 DDAG |
439 | |
440 | qemu_start_incoming_migration(uri, &local_err); | |
441 | ||
442 | if (local_err) { | |
443 | error_propagate(errp, local_err); | |
444 | return; | |
445 | } | |
446 | ||
4debb5f5 | 447 | once = false; |
bf1ae1f4 DDAG |
448 | } |
449 | ||
e1c37d0e LC |
450 | void qmp_migrate(const char *uri, bool has_blk, bool blk, |
451 | bool has_inc, bool inc, bool has_detach, bool detach, | |
452 | Error **errp) | |
cab30143 | 453 | { |
be7059cd | 454 | Error *local_err = NULL; |
17549e84 | 455 | MigrationState *s = migrate_get_current(); |
6607ae23 | 456 | MigrationParams params; |
cab30143 | 457 | const char *p; |
cab30143 | 458 | |
8c0426ae PP |
459 | params.blk = has_blk && blk; |
460 | params.shared = has_inc && inc; | |
6607ae23 | 461 | |
31194731 HZ |
462 | if (s->state == MIGRATION_STATUS_ACTIVE || |
463 | s->state == MIGRATION_STATUS_SETUP || | |
464 | s->state == MIGRATION_STATUS_CANCELLING) { | |
e1c37d0e LC |
465 | error_set(errp, QERR_MIGRATION_ACTIVE); |
466 | return; | |
cab30143 JQ |
467 | } |
468 | ||
ca99993a DDAG |
469 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
470 | error_setg(errp, "Guest is waiting for an incoming migration"); | |
471 | return; | |
472 | } | |
473 | ||
e1c37d0e LC |
474 | if (qemu_savevm_state_blocked(errp)) { |
475 | return; | |
cab30143 JQ |
476 | } |
477 | ||
fa2756b7 | 478 | if (migration_blockers) { |
e1c37d0e LC |
479 | *errp = error_copy(migration_blockers->data); |
480 | return; | |
fa2756b7 AL |
481 | } |
482 | ||
6607ae23 | 483 | s = migrate_init(¶ms); |
cab30143 JQ |
484 | |
485 | if (strstart(uri, "tcp:", &p)) { | |
f37afb5a | 486 | tcp_start_outgoing_migration(s, p, &local_err); |
2da776db | 487 | #ifdef CONFIG_RDMA |
41310c68 | 488 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
489 | rdma_start_outgoing_migration(s, p, &local_err); |
490 | #endif | |
cab30143 JQ |
491 | #if !defined(WIN32) |
492 | } else if (strstart(uri, "exec:", &p)) { | |
f37afb5a | 493 | exec_start_outgoing_migration(s, p, &local_err); |
cab30143 | 494 | } else if (strstart(uri, "unix:", &p)) { |
f37afb5a | 495 | unix_start_outgoing_migration(s, p, &local_err); |
cab30143 | 496 | } else if (strstart(uri, "fd:", &p)) { |
f37afb5a | 497 | fd_start_outgoing_migration(s, p, &local_err); |
cab30143 | 498 | #endif |
99a0db9b | 499 | } else { |
e1c37d0e | 500 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "uri", "a valid migration protocol"); |
31194731 | 501 | s->state = MIGRATION_STATUS_FAILED; |
e1c37d0e | 502 | return; |
cab30143 JQ |
503 | } |
504 | ||
f37afb5a | 505 | if (local_err) { |
342ab8d1 | 506 | migrate_fd_error(s); |
f37afb5a | 507 | error_propagate(errp, local_err); |
e1c37d0e | 508 | return; |
1299c631 | 509 | } |
cab30143 JQ |
510 | } |
511 | ||
6cdedb07 | 512 | void qmp_migrate_cancel(Error **errp) |
cab30143 | 513 | { |
17549e84 | 514 | migrate_fd_cancel(migrate_get_current()); |
cab30143 JQ |
515 | } |
516 | ||
9e1ba4cc OW |
517 | void qmp_migrate_set_cache_size(int64_t value, Error **errp) |
518 | { | |
519 | MigrationState *s = migrate_get_current(); | |
c91e681a | 520 | int64_t new_size; |
9e1ba4cc OW |
521 | |
522 | /* Check for truncation */ | |
523 | if (value != (size_t)value) { | |
524 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", | |
525 | "exceeding address space"); | |
526 | return; | |
527 | } | |
528 | ||
a5615b14 OW |
529 | /* Cache should not be larger than guest ram size */ |
530 | if (value > ram_bytes_total()) { | |
531 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", | |
532 | "exceeds guest ram size "); | |
533 | return; | |
534 | } | |
535 | ||
c91e681a OW |
536 | new_size = xbzrle_cache_resize(value); |
537 | if (new_size < 0) { | |
538 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", | |
539 | "is smaller than page size"); | |
540 | return; | |
541 | } | |
542 | ||
543 | s->xbzrle_cache_size = new_size; | |
9e1ba4cc OW |
544 | } |
545 | ||
546 | int64_t qmp_query_migrate_cache_size(Error **errp) | |
547 | { | |
548 | return migrate_xbzrle_cache_size(); | |
549 | } | |
550 | ||
3dc85383 | 551 | void qmp_migrate_set_speed(int64_t value, Error **errp) |
cab30143 | 552 | { |
cab30143 JQ |
553 | MigrationState *s; |
554 | ||
3dc85383 LC |
555 | if (value < 0) { |
556 | value = 0; | |
99a0db9b | 557 | } |
442773ce PB |
558 | if (value > SIZE_MAX) { |
559 | value = SIZE_MAX; | |
560 | } | |
cab30143 | 561 | |
17549e84 | 562 | s = migrate_get_current(); |
3dc85383 | 563 | s->bandwidth_limit = value; |
442773ce PB |
564 | if (s->file) { |
565 | qemu_file_set_rate_limit(s->file, s->bandwidth_limit / XFER_LIMIT_RATIO); | |
566 | } | |
cab30143 JQ |
567 | } |
568 | ||
4f0a993b | 569 | void qmp_migrate_set_downtime(double value, Error **errp) |
cab30143 | 570 | { |
4f0a993b LC |
571 | value *= 1e9; |
572 | value = MAX(0, MIN(UINT64_MAX, value)); | |
573 | max_downtime = (uint64_t)value; | |
99a0db9b | 574 | } |
17ad9b35 | 575 | |
bde1e2ec CV |
576 | bool migrate_auto_converge(void) |
577 | { | |
578 | MigrationState *s; | |
579 | ||
580 | s = migrate_get_current(); | |
581 | ||
582 | return s->enabled_capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; | |
583 | } | |
584 | ||
323004a3 PL |
585 | bool migrate_zero_blocks(void) |
586 | { | |
587 | MigrationState *s; | |
588 | ||
589 | s = migrate_get_current(); | |
590 | ||
591 | return s->enabled_capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS]; | |
592 | } | |
593 | ||
17ad9b35 OW |
594 | int migrate_use_xbzrle(void) |
595 | { | |
596 | MigrationState *s; | |
597 | ||
598 | s = migrate_get_current(); | |
599 | ||
600 | return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE]; | |
601 | } | |
602 | ||
603 | int64_t migrate_xbzrle_cache_size(void) | |
604 | { | |
605 | MigrationState *s; | |
606 | ||
607 | s = migrate_get_current(); | |
608 | ||
609 | return s->xbzrle_cache_size; | |
610 | } | |
0d82d0e8 JQ |
611 | |
612 | /* migration thread support */ | |
613 | ||
5f496a1b | 614 | static void *migration_thread(void *opaque) |
0d82d0e8 | 615 | { |
9848a404 | 616 | MigrationState *s = opaque; |
bc72ad67 AB |
617 | int64_t initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
618 | int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST); | |
be7172e2 | 619 | int64_t initial_bytes = 0; |
0d82d0e8 | 620 | int64_t max_size = 0; |
a3fa1d78 PB |
621 | int64_t start_time = initial_time; |
622 | bool old_vm_running = false; | |
76f5933a | 623 | |
dba433c0 | 624 | qemu_savevm_state_begin(s->file, &s->params); |
0d82d0e8 | 625 | |
bc72ad67 | 626 | s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start; |
31194731 | 627 | migrate_set_state(s, MIGRATION_STATUS_SETUP, MIGRATION_STATUS_ACTIVE); |
29ae8a41 | 628 | |
31194731 | 629 | while (s->state == MIGRATION_STATUS_ACTIVE) { |
a3e879cd | 630 | int64_t current_time; |
c369f40d | 631 | uint64_t pending_size; |
0d82d0e8 | 632 | |
a0ff044b | 633 | if (!qemu_file_rate_limit(s->file)) { |
c369f40d | 634 | pending_size = qemu_savevm_state_pending(s->file, max_size); |
9013dca5 | 635 | trace_migrate_pending(pending_size, max_size); |
b22ff1fb | 636 | if (pending_size && pending_size >= max_size) { |
dba433c0 | 637 | qemu_savevm_state_iterate(s->file); |
c369f40d | 638 | } else { |
0e1146a7 KW |
639 | int ret; |
640 | ||
32c835ba | 641 | qemu_mutex_lock_iothread(); |
bc72ad67 | 642 | start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
c369f40d | 643 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER); |
a3fa1d78 | 644 | old_vm_running = runstate_is_running(); |
0e1146a7 KW |
645 | |
646 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); | |
647 | if (ret >= 0) { | |
40596834 | 648 | qemu_file_set_rate_limit(s->file, INT64_MAX); |
0e1146a7 KW |
649 | qemu_savevm_state_complete(s->file); |
650 | } | |
32c835ba | 651 | qemu_mutex_unlock_iothread(); |
0e1146a7 KW |
652 | |
653 | if (ret < 0) { | |
31194731 HZ |
654 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
655 | MIGRATION_STATUS_FAILED); | |
0e1146a7 KW |
656 | break; |
657 | } | |
658 | ||
059f896c | 659 | if (!qemu_file_get_error(s->file)) { |
31194731 HZ |
660 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
661 | MIGRATION_STATUS_COMPLETED); | |
059f896c PB |
662 | break; |
663 | } | |
c369f40d JQ |
664 | } |
665 | } | |
f4410a5d | 666 | |
fd45ee2c | 667 | if (qemu_file_get_error(s->file)) { |
31194731 HZ |
668 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
669 | MIGRATION_STATUS_FAILED); | |
fd45ee2c PB |
670 | break; |
671 | } | |
bc72ad67 | 672 | current_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0d82d0e8 | 673 | if (current_time >= initial_time + BUFFER_DELAY) { |
be7172e2 | 674 | uint64_t transferred_bytes = qemu_ftell(s->file) - initial_bytes; |
77417f10 | 675 | uint64_t time_spent = current_time - initial_time; |
0d82d0e8 JQ |
676 | double bandwidth = transferred_bytes / time_spent; |
677 | max_size = bandwidth * migrate_max_downtime() / 1000000; | |
678 | ||
7e114f8c MH |
679 | s->mbps = time_spent ? (((double) transferred_bytes * 8.0) / |
680 | ((double) time_spent / 1000.0)) / 1000.0 / 1000.0 : -1; | |
681 | ||
9013dca5 AK |
682 | trace_migrate_transferred(transferred_bytes, time_spent, |
683 | bandwidth, max_size); | |
90f8ae72 JQ |
684 | /* if we haven't sent anything, we don't want to recalculate |
685 | 10000 is a small enough number for our purposes */ | |
686 | if (s->dirty_bytes_rate && transferred_bytes > 10000) { | |
687 | s->expected_downtime = s->dirty_bytes_rate / bandwidth; | |
688 | } | |
0d82d0e8 | 689 | |
1964a397 | 690 | qemu_file_reset_rate_limit(s->file); |
0d82d0e8 | 691 | initial_time = current_time; |
be7172e2 | 692 | initial_bytes = qemu_ftell(s->file); |
0d82d0e8 | 693 | } |
a0ff044b | 694 | if (qemu_file_rate_limit(s->file)) { |
0d82d0e8 JQ |
695 | /* usleep expects microseconds */ |
696 | g_usleep((initial_time + BUFFER_DELAY - current_time)*1000); | |
697 | } | |
a3fa1d78 PB |
698 | } |
699 | ||
f4410a5d | 700 | qemu_mutex_lock_iothread(); |
31194731 | 701 | if (s->state == MIGRATION_STATUS_COMPLETED) { |
bc72ad67 | 702 | int64_t end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
d6ed7312 | 703 | uint64_t transferred_bytes = qemu_ftell(s->file); |
a3fa1d78 PB |
704 | s->total_time = end_time - s->total_time; |
705 | s->downtime = end_time - start_time; | |
d6ed7312 PL |
706 | if (s->total_time) { |
707 | s->mbps = (((double) transferred_bytes * 8.0) / | |
708 | ((double) s->total_time)) / 1000; | |
709 | } | |
a3fa1d78 PB |
710 | runstate_set(RUN_STATE_POSTMIGRATE); |
711 | } else { | |
712 | if (old_vm_running) { | |
a3fa1d78 | 713 | vm_start(); |
dba433c0 | 714 | } |
0d82d0e8 | 715 | } |
bb1fadc4 | 716 | qemu_bh_schedule(s->cleanup_bh); |
dba433c0 | 717 | qemu_mutex_unlock_iothread(); |
f4410a5d | 718 | |
0d82d0e8 JQ |
719 | return NULL; |
720 | } | |
721 | ||
9848a404 | 722 | void migrate_fd_connect(MigrationState *s) |
0d82d0e8 | 723 | { |
31194731 HZ |
724 | s->state = MIGRATION_STATUS_SETUP; |
725 | trace_migrate_set_state(MIGRATION_STATUS_SETUP); | |
c09e5bb1 | 726 | |
cc283e3b JQ |
727 | /* This is a best 1st approximation. ns to ms */ |
728 | s->expected_downtime = max_downtime/1000000; | |
bb1fadc4 | 729 | s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s); |
0d82d0e8 | 730 | |
442773ce PB |
731 | qemu_file_set_rate_limit(s->file, |
732 | s->bandwidth_limit / XFER_LIMIT_RATIO); | |
733 | ||
9287ac27 SH |
734 | /* Notify before starting migration thread */ |
735 | notifier_list_notify(&migration_state_notifiers, s); | |
736 | ||
4900116e | 737 | qemu_thread_create(&s->thread, "migration", migration_thread, s, |
bb1fadc4 | 738 | QEMU_THREAD_JOINABLE); |
0d82d0e8 | 739 | } |