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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" | |
caf71f86 | 17 | #include "migration/migration.h" |
83c9089e | 18 | #include "monitor/monitor.h" |
065e2813 | 19 | #include "buffered_file.h" |
9c17d615 | 20 | #include "sysemu/sysemu.h" |
737e150e | 21 | #include "block/block.h" |
1de7afc9 | 22 | #include "qemu/sockets.h" |
caf71f86 | 23 | #include "migration/block.h" |
766bd176 | 24 | #include "qemu/thread.h" |
791e7c82 | 25 | #include "qmp-commands.h" |
065e2813 AL |
26 | |
27 | //#define DEBUG_MIGRATION | |
28 | ||
29 | #ifdef DEBUG_MIGRATION | |
d0f2c4c6 | 30 | #define DPRINTF(fmt, ...) \ |
065e2813 AL |
31 | do { printf("migration: " fmt, ## __VA_ARGS__); } while (0) |
32 | #else | |
d0f2c4c6 | 33 | #define DPRINTF(fmt, ...) \ |
065e2813 AL |
34 | do { } while (0) |
35 | #endif | |
5bb7910a | 36 | |
7dc688ed JQ |
37 | enum { |
38 | MIG_STATE_ERROR, | |
39 | MIG_STATE_SETUP, | |
40 | MIG_STATE_CANCELLED, | |
41 | MIG_STATE_ACTIVE, | |
42 | MIG_STATE_COMPLETED, | |
43 | }; | |
5bb7910a | 44 | |
d0ae46c1 | 45 | #define MAX_THROTTLE (32 << 20) /* Migration speed throttling */ |
5bb7910a | 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 | ||
17549e84 JQ |
53 | /* When we add fault tolerance, we could have several |
54 | migrations at once. For now we don't need to add | |
55 | dynamic creation of migration */ | |
56 | ||
859bc756 | 57 | MigrationState *migrate_get_current(void) |
17549e84 JQ |
58 | { |
59 | static MigrationState current_migration = { | |
60 | .state = MIG_STATE_SETUP, | |
d0ae46c1 | 61 | .bandwidth_limit = MAX_THROTTLE, |
17ad9b35 | 62 | .xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE, |
17549e84 JQ |
63 | }; |
64 | ||
65 | return ¤t_migration; | |
66 | } | |
67 | ||
43eaae28 | 68 | void qemu_start_incoming_migration(const char *uri, Error **errp) |
5bb7910a | 69 | { |
34c9dd8e AL |
70 | const char *p; |
71 | ||
72 | if (strstart(uri, "tcp:", &p)) | |
43eaae28 | 73 | tcp_start_incoming_migration(p, errp); |
065e2813 AL |
74 | #if !defined(WIN32) |
75 | else if (strstart(uri, "exec:", &p)) | |
43eaae28 | 76 | exec_start_incoming_migration(p, errp); |
4951f65b | 77 | else if (strstart(uri, "unix:", &p)) |
43eaae28 | 78 | unix_start_incoming_migration(p, errp); |
5ac1fad3 | 79 | else if (strstart(uri, "fd:", &p)) |
43eaae28 | 80 | fd_start_incoming_migration(p, errp); |
065e2813 | 81 | #endif |
8ca5e801 | 82 | else { |
43eaae28 | 83 | error_setg(errp, "unknown migration protocol: %s\n", uri); |
8ca5e801 | 84 | } |
5bb7910a AL |
85 | } |
86 | ||
82a4da79 | 87 | static void process_incoming_migration_co(void *opaque) |
511c0231 | 88 | { |
82a4da79 | 89 | QEMUFile *f = opaque; |
1c12e1f5 PB |
90 | int ret; |
91 | ||
92 | ret = qemu_loadvm_state(f); | |
82a4da79 | 93 | qemu_set_fd_handler(qemu_get_fd(f), NULL, NULL, NULL); |
1c12e1f5 PB |
94 | qemu_fclose(f); |
95 | if (ret < 0) { | |
511c0231 JQ |
96 | fprintf(stderr, "load of migration failed\n"); |
97 | exit(0); | |
98 | } | |
99 | qemu_announce_self(); | |
100 | DPRINTF("successfully loaded vm state\n"); | |
101 | ||
901862cb | 102 | bdrv_clear_incoming_migration_all(); |
0f15423c AL |
103 | /* Make sure all file formats flush their mutable metadata */ |
104 | bdrv_invalidate_cache_all(); | |
105 | ||
f5bbfba1 | 106 | if (autostart) { |
511c0231 | 107 | vm_start(); |
f5bbfba1 | 108 | } else { |
29ed72f1 | 109 | runstate_set(RUN_STATE_PAUSED); |
f5bbfba1 | 110 | } |
511c0231 JQ |
111 | } |
112 | ||
82a4da79 PB |
113 | static void enter_migration_coroutine(void *opaque) |
114 | { | |
115 | Coroutine *co = opaque; | |
116 | qemu_coroutine_enter(co, NULL); | |
117 | } | |
118 | ||
119 | void process_incoming_migration(QEMUFile *f) | |
120 | { | |
121 | Coroutine *co = qemu_coroutine_create(process_incoming_migration_co); | |
122 | int fd = qemu_get_fd(f); | |
123 | ||
124 | assert(fd != -1); | |
125 | socket_set_nonblock(fd); | |
126 | qemu_set_fd_handler(fd, enter_migration_coroutine, NULL, co); | |
127 | qemu_coroutine_enter(co, f); | |
128 | } | |
129 | ||
a0a3fd60 GC |
130 | /* amount of nanoseconds we are willing to wait for migration to be down. |
131 | * the choice of nanoseconds is because it is the maximum resolution that | |
132 | * get_clock() can achieve. It is an internal measure. All user-visible | |
133 | * units must be in seconds */ | |
134 | static uint64_t max_downtime = 30000000; | |
135 | ||
136 | uint64_t migrate_max_downtime(void) | |
137 | { | |
138 | return max_downtime; | |
139 | } | |
140 | ||
bbf6da32 OW |
141 | MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) |
142 | { | |
143 | MigrationCapabilityStatusList *head = NULL; | |
144 | MigrationCapabilityStatusList *caps; | |
145 | MigrationState *s = migrate_get_current(); | |
146 | int i; | |
147 | ||
148 | for (i = 0; i < MIGRATION_CAPABILITY_MAX; i++) { | |
149 | if (head == NULL) { | |
150 | head = g_malloc0(sizeof(*caps)); | |
151 | caps = head; | |
152 | } else { | |
153 | caps->next = g_malloc0(sizeof(*caps)); | |
154 | caps = caps->next; | |
155 | } | |
156 | caps->value = | |
157 | g_malloc(sizeof(*caps->value)); | |
158 | caps->value->capability = i; | |
159 | caps->value->state = s->enabled_capabilities[i]; | |
160 | } | |
161 | ||
162 | return head; | |
163 | } | |
164 | ||
f36d55af OW |
165 | static void get_xbzrle_cache_stats(MigrationInfo *info) |
166 | { | |
167 | if (migrate_use_xbzrle()) { | |
168 | info->has_xbzrle_cache = true; | |
169 | info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache)); | |
170 | info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size(); | |
171 | info->xbzrle_cache->bytes = xbzrle_mig_bytes_transferred(); | |
172 | info->xbzrle_cache->pages = xbzrle_mig_pages_transferred(); | |
173 | info->xbzrle_cache->cache_miss = xbzrle_mig_pages_cache_miss(); | |
174 | info->xbzrle_cache->overflow = xbzrle_mig_pages_overflow(); | |
175 | } | |
176 | } | |
177 | ||
791e7c82 | 178 | MigrationInfo *qmp_query_migrate(Error **errp) |
5bb7910a | 179 | { |
791e7c82 | 180 | MigrationInfo *info = g_malloc0(sizeof(*info)); |
17549e84 JQ |
181 | MigrationState *s = migrate_get_current(); |
182 | ||
183 | switch (s->state) { | |
184 | case MIG_STATE_SETUP: | |
185 | /* no migration has happened ever */ | |
186 | break; | |
187 | case MIG_STATE_ACTIVE: | |
791e7c82 LC |
188 | info->has_status = true; |
189 | info->status = g_strdup("active"); | |
7aa939af JQ |
190 | info->has_total_time = true; |
191 | info->total_time = qemu_get_clock_ms(rt_clock) | |
192 | - s->total_time; | |
2c52ddf1 JQ |
193 | info->has_expected_downtime = true; |
194 | info->expected_downtime = s->expected_downtime; | |
17549e84 | 195 | |
791e7c82 LC |
196 | info->has_ram = true; |
197 | info->ram = g_malloc0(sizeof(*info->ram)); | |
198 | info->ram->transferred = ram_bytes_transferred(); | |
199 | info->ram->remaining = ram_bytes_remaining(); | |
200 | info->ram->total = ram_bytes_total(); | |
004d4c10 OW |
201 | info->ram->duplicate = dup_mig_pages_transferred(); |
202 | info->ram->normal = norm_mig_pages_transferred(); | |
203 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
8d017193 JQ |
204 | info->ram->dirty_pages_rate = s->dirty_pages_rate; |
205 | ||
17549e84 JQ |
206 | |
207 | if (blk_mig_active()) { | |
791e7c82 LC |
208 | info->has_disk = true; |
209 | info->disk = g_malloc0(sizeof(*info->disk)); | |
210 | info->disk->transferred = blk_mig_bytes_transferred(); | |
211 | info->disk->remaining = blk_mig_bytes_remaining(); | |
212 | info->disk->total = blk_mig_bytes_total(); | |
ff8d81d8 | 213 | } |
f36d55af OW |
214 | |
215 | get_xbzrle_cache_stats(info); | |
17549e84 JQ |
216 | break; |
217 | case MIG_STATE_COMPLETED: | |
f36d55af OW |
218 | get_xbzrle_cache_stats(info); |
219 | ||
791e7c82 LC |
220 | info->has_status = true; |
221 | info->status = g_strdup("completed"); | |
7aa939af | 222 | info->total_time = s->total_time; |
9c5a9fcf JQ |
223 | info->has_downtime = true; |
224 | info->downtime = s->downtime; | |
d5f8a570 JQ |
225 | |
226 | info->has_ram = true; | |
227 | info->ram = g_malloc0(sizeof(*info->ram)); | |
228 | info->ram->transferred = ram_bytes_transferred(); | |
229 | info->ram->remaining = 0; | |
230 | info->ram->total = ram_bytes_total(); | |
004d4c10 OW |
231 | info->ram->duplicate = dup_mig_pages_transferred(); |
232 | info->ram->normal = norm_mig_pages_transferred(); | |
233 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
17549e84 JQ |
234 | break; |
235 | case MIG_STATE_ERROR: | |
791e7c82 LC |
236 | info->has_status = true; |
237 | info->status = g_strdup("failed"); | |
17549e84 JQ |
238 | break; |
239 | case MIG_STATE_CANCELLED: | |
791e7c82 LC |
240 | info->has_status = true; |
241 | info->status = g_strdup("cancelled"); | |
17549e84 | 242 | break; |
5bb7910a | 243 | } |
791e7c82 LC |
244 | |
245 | return info; | |
5bb7910a AL |
246 | } |
247 | ||
00458433 OW |
248 | void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, |
249 | Error **errp) | |
250 | { | |
251 | MigrationState *s = migrate_get_current(); | |
252 | MigrationCapabilityStatusList *cap; | |
253 | ||
254 | if (s->state == MIG_STATE_ACTIVE) { | |
255 | error_set(errp, QERR_MIGRATION_ACTIVE); | |
256 | return; | |
257 | } | |
258 | ||
259 | for (cap = params; cap; cap = cap->next) { | |
260 | s->enabled_capabilities[cap->value->capability] = cap->value->state; | |
261 | } | |
262 | } | |
263 | ||
065e2813 AL |
264 | /* shared migration helpers */ |
265 | ||
8b6b99b3 | 266 | static int migrate_fd_cleanup(MigrationState *s) |
065e2813 | 267 | { |
41ef56e6 AL |
268 | int ret = 0; |
269 | ||
065e2813 | 270 | if (s->file) { |
d0f2c4c6 | 271 | DPRINTF("closing file\n"); |
a6d34a94 | 272 | ret = qemu_fclose(s->file); |
5d39c799 | 273 | s->file = NULL; |
065e2813 AL |
274 | } |
275 | ||
24ea1e4b | 276 | assert(s->fd == -1); |
41ef56e6 | 277 | return ret; |
065e2813 AL |
278 | } |
279 | ||
8b6b99b3 | 280 | void migrate_fd_error(MigrationState *s) |
065e2813 | 281 | { |
8b6b99b3 JQ |
282 | DPRINTF("setting error state\n"); |
283 | s->state = MIG_STATE_ERROR; | |
e0eb7390 | 284 | notifier_list_notify(&migration_state_notifiers, s); |
8b6b99b3 JQ |
285 | migrate_fd_cleanup(s); |
286 | } | |
287 | ||
458cf28e JQ |
288 | static void migrate_fd_completed(MigrationState *s) |
289 | { | |
290 | DPRINTF("setting completed state\n"); | |
291 | if (migrate_fd_cleanup(s) < 0) { | |
292 | s->state = MIG_STATE_ERROR; | |
293 | } else { | |
294 | s->state = MIG_STATE_COMPLETED; | |
295 | runstate_set(RUN_STATE_POSTMIGRATE); | |
296 | } | |
e0eb7390 | 297 | notifier_list_notify(&migration_state_notifiers, s); |
458cf28e JQ |
298 | } |
299 | ||
c87b015b JQ |
300 | ssize_t migrate_fd_put_buffer(MigrationState *s, const void *data, |
301 | size_t size) | |
065e2813 | 302 | { |
065e2813 AL |
303 | ssize_t ret; |
304 | ||
fdbecb5d JQ |
305 | if (s->state != MIG_STATE_ACTIVE) { |
306 | return -EIO; | |
307 | } | |
308 | ||
065e2813 AL |
309 | do { |
310 | ret = s->write(s, data, size); | |
95b134ea | 311 | } while (ret == -1 && ((s->get_error(s)) == EINTR)); |
065e2813 AL |
312 | |
313 | if (ret == -1) | |
314 | ret = -(s->get_error(s)); | |
315 | ||
065e2813 AL |
316 | return ret; |
317 | } | |
318 | ||
2c9adcb8 | 319 | void migrate_fd_put_ready(MigrationState *s) |
065e2813 AL |
320 | { |
321 | int ret; | |
322 | ||
065e2813 | 323 | if (s->state != MIG_STATE_ACTIVE) { |
d0f2c4c6 | 324 | DPRINTF("put_ready returning because of non-active state\n"); |
065e2813 AL |
325 | return; |
326 | } | |
766bd176 JQ |
327 | if (s->first_time) { |
328 | s->first_time = false; | |
329 | DPRINTF("beginning savevm\n"); | |
330 | ret = qemu_savevm_state_begin(s->file, &s->params); | |
331 | if (ret < 0) { | |
332 | DPRINTF("failed, %d\n", ret); | |
333 | migrate_fd_error(s); | |
334 | return; | |
335 | } | |
336 | } | |
065e2813 | 337 | |
d0f2c4c6 | 338 | DPRINTF("iterate\n"); |
539de124 | 339 | ret = qemu_savevm_state_iterate(s->file); |
39346385 JQ |
340 | if (ret < 0) { |
341 | migrate_fd_error(s); | |
342 | } else if (ret == 1) { | |
1354869c | 343 | int old_vm_running = runstate_is_running(); |
9c5a9fcf | 344 | int64_t start_time, end_time; |
eeb34af9 | 345 | |
d0f2c4c6 | 346 | DPRINTF("done iterating\n"); |
9c5a9fcf | 347 | start_time = qemu_get_clock_ms(rt_clock); |
7b5d3aa2 | 348 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER); |
766bd176 JQ |
349 | if (old_vm_running) { |
350 | vm_stop(RUN_STATE_FINISH_MIGRATE); | |
351 | } else { | |
352 | vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); | |
353 | } | |
065e2813 | 354 | |
539de124 | 355 | if (qemu_savevm_state_complete(s->file) < 0) { |
67afff79 | 356 | migrate_fd_error(s); |
b161d123 | 357 | } else { |
458cf28e | 358 | migrate_fd_completed(s); |
b161d123 | 359 | } |
97d4d961 JQ |
360 | end_time = qemu_get_clock_ms(rt_clock); |
361 | s->total_time = end_time - s->total_time; | |
9c5a9fcf | 362 | s->downtime = end_time - start_time; |
48a2f4d6 | 363 | if (s->state != MIG_STATE_COMPLETED) { |
41ef56e6 AL |
364 | if (old_vm_running) { |
365 | vm_start(); | |
366 | } | |
f5bbfba1 | 367 | } |
065e2813 AL |
368 | } |
369 | } | |
370 | ||
0edda1c4 | 371 | static void migrate_fd_cancel(MigrationState *s) |
065e2813 | 372 | { |
065e2813 AL |
373 | if (s->state != MIG_STATE_ACTIVE) |
374 | return; | |
375 | ||
d0f2c4c6 | 376 | DPRINTF("cancelling migration\n"); |
065e2813 AL |
377 | |
378 | s->state = MIG_STATE_CANCELLED; | |
e0eb7390 | 379 | notifier_list_notify(&migration_state_notifiers, s); |
539de124 | 380 | qemu_savevm_state_cancel(s->file); |
065e2813 AL |
381 | |
382 | migrate_fd_cleanup(s); | |
383 | } | |
384 | ||
9499743f | 385 | int migrate_fd_wait_for_unfreeze(MigrationState *s) |
065e2813 | 386 | { |
065e2813 AL |
387 | int ret; |
388 | ||
d0f2c4c6 | 389 | DPRINTF("wait for unfreeze\n"); |
065e2813 | 390 | if (s->state != MIG_STATE_ACTIVE) |
9499743f | 391 | return -EINVAL; |
065e2813 AL |
392 | |
393 | do { | |
394 | fd_set wfds; | |
395 | ||
396 | FD_ZERO(&wfds); | |
397 | FD_SET(s->fd, &wfds); | |
398 | ||
399 | ret = select(s->fd + 1, NULL, &wfds, NULL, NULL); | |
400 | } while (ret == -1 && (s->get_error(s)) == EINTR); | |
af509450 JQ |
401 | |
402 | if (ret == -1) { | |
9499743f | 403 | return -s->get_error(s); |
af509450 | 404 | } |
9499743f | 405 | return 0; |
065e2813 AL |
406 | } |
407 | ||
11c76741 | 408 | int migrate_fd_close(MigrationState *s) |
065e2813 | 409 | { |
8dc592e6 PB |
410 | int rc = 0; |
411 | if (s->fd != -1) { | |
8dc592e6 PB |
412 | rc = s->close(s); |
413 | s->fd = -1; | |
414 | } | |
415 | return rc; | |
065e2813 | 416 | } |
99a0db9b GH |
417 | |
418 | void add_migration_state_change_notifier(Notifier *notify) | |
419 | { | |
420 | notifier_list_add(&migration_state_notifiers, notify); | |
421 | } | |
422 | ||
423 | void remove_migration_state_change_notifier(Notifier *notify) | |
424 | { | |
31552529 | 425 | notifier_remove(notify); |
99a0db9b GH |
426 | } |
427 | ||
afe2df69 GH |
428 | bool migration_is_active(MigrationState *s) |
429 | { | |
430 | return s->state == MIG_STATE_ACTIVE; | |
431 | } | |
432 | ||
7073693b | 433 | bool migration_has_finished(MigrationState *s) |
99a0db9b | 434 | { |
7073693b | 435 | return s->state == MIG_STATE_COMPLETED; |
99a0db9b | 436 | } |
0edda1c4 | 437 | |
afe2df69 GH |
438 | bool migration_has_failed(MigrationState *s) |
439 | { | |
440 | return (s->state == MIG_STATE_CANCELLED || | |
441 | s->state == MIG_STATE_ERROR); | |
442 | } | |
443 | ||
8b6b99b3 | 444 | void migrate_fd_connect(MigrationState *s) |
99a0db9b | 445 | { |
d5934dde | 446 | s->state = MIG_STATE_ACTIVE; |
766bd176 | 447 | s->first_time = true; |
edfa1af5 | 448 | qemu_fopen_ops_buffered(s); |
8b6b99b3 JQ |
449 | } |
450 | ||
6607ae23 | 451 | static MigrationState *migrate_init(const MigrationParams *params) |
0edda1c4 | 452 | { |
17549e84 | 453 | MigrationState *s = migrate_get_current(); |
d0ae46c1 | 454 | int64_t bandwidth_limit = s->bandwidth_limit; |
bbf6da32 | 455 | bool enabled_capabilities[MIGRATION_CAPABILITY_MAX]; |
17ad9b35 | 456 | int64_t xbzrle_cache_size = s->xbzrle_cache_size; |
bbf6da32 OW |
457 | |
458 | memcpy(enabled_capabilities, s->enabled_capabilities, | |
459 | sizeof(enabled_capabilities)); | |
0edda1c4 | 460 | |
17549e84 | 461 | memset(s, 0, sizeof(*s)); |
d0ae46c1 | 462 | s->bandwidth_limit = bandwidth_limit; |
6607ae23 | 463 | s->params = *params; |
bbf6da32 OW |
464 | memcpy(s->enabled_capabilities, enabled_capabilities, |
465 | sizeof(enabled_capabilities)); | |
17ad9b35 | 466 | s->xbzrle_cache_size = xbzrle_cache_size; |
1299c631 | 467 | |
0edda1c4 | 468 | s->bandwidth_limit = bandwidth_limit; |
d5934dde | 469 | s->state = MIG_STATE_SETUP; |
d5f8a570 | 470 | s->total_time = qemu_get_clock_ms(rt_clock); |
0edda1c4 | 471 | |
0edda1c4 JQ |
472 | return s; |
473 | } | |
cab30143 | 474 | |
fa2756b7 AL |
475 | static GSList *migration_blockers; |
476 | ||
477 | void migrate_add_blocker(Error *reason) | |
478 | { | |
479 | migration_blockers = g_slist_prepend(migration_blockers, reason); | |
480 | } | |
481 | ||
482 | void migrate_del_blocker(Error *reason) | |
483 | { | |
484 | migration_blockers = g_slist_remove(migration_blockers, reason); | |
485 | } | |
486 | ||
e1c37d0e LC |
487 | void qmp_migrate(const char *uri, bool has_blk, bool blk, |
488 | bool has_inc, bool inc, bool has_detach, bool detach, | |
489 | Error **errp) | |
cab30143 | 490 | { |
be7059cd | 491 | Error *local_err = NULL; |
17549e84 | 492 | MigrationState *s = migrate_get_current(); |
6607ae23 | 493 | MigrationParams params; |
cab30143 | 494 | const char *p; |
cab30143 | 495 | |
6607ae23 IY |
496 | params.blk = blk; |
497 | params.shared = inc; | |
498 | ||
17549e84 | 499 | if (s->state == MIG_STATE_ACTIVE) { |
e1c37d0e LC |
500 | error_set(errp, QERR_MIGRATION_ACTIVE); |
501 | return; | |
cab30143 JQ |
502 | } |
503 | ||
e1c37d0e LC |
504 | if (qemu_savevm_state_blocked(errp)) { |
505 | return; | |
cab30143 JQ |
506 | } |
507 | ||
fa2756b7 | 508 | if (migration_blockers) { |
e1c37d0e LC |
509 | *errp = error_copy(migration_blockers->data); |
510 | return; | |
fa2756b7 AL |
511 | } |
512 | ||
6607ae23 | 513 | s = migrate_init(¶ms); |
cab30143 JQ |
514 | |
515 | if (strstart(uri, "tcp:", &p)) { | |
f37afb5a | 516 | tcp_start_outgoing_migration(s, p, &local_err); |
cab30143 JQ |
517 | #if !defined(WIN32) |
518 | } else if (strstart(uri, "exec:", &p)) { | |
f37afb5a | 519 | exec_start_outgoing_migration(s, p, &local_err); |
cab30143 | 520 | } else if (strstart(uri, "unix:", &p)) { |
f37afb5a | 521 | unix_start_outgoing_migration(s, p, &local_err); |
cab30143 | 522 | } else if (strstart(uri, "fd:", &p)) { |
f37afb5a | 523 | fd_start_outgoing_migration(s, p, &local_err); |
cab30143 | 524 | #endif |
99a0db9b | 525 | } else { |
e1c37d0e LC |
526 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "uri", "a valid migration protocol"); |
527 | return; | |
cab30143 JQ |
528 | } |
529 | ||
f37afb5a | 530 | if (local_err) { |
342ab8d1 | 531 | migrate_fd_error(s); |
f37afb5a | 532 | error_propagate(errp, local_err); |
e1c37d0e | 533 | return; |
1299c631 JQ |
534 | } |
535 | ||
e0eb7390 | 536 | notifier_list_notify(&migration_state_notifiers, s); |
cab30143 JQ |
537 | } |
538 | ||
6cdedb07 | 539 | void qmp_migrate_cancel(Error **errp) |
cab30143 | 540 | { |
17549e84 | 541 | migrate_fd_cancel(migrate_get_current()); |
cab30143 JQ |
542 | } |
543 | ||
9e1ba4cc OW |
544 | void qmp_migrate_set_cache_size(int64_t value, Error **errp) |
545 | { | |
546 | MigrationState *s = migrate_get_current(); | |
547 | ||
548 | /* Check for truncation */ | |
549 | if (value != (size_t)value) { | |
550 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", | |
551 | "exceeding address space"); | |
552 | return; | |
553 | } | |
554 | ||
555 | s->xbzrle_cache_size = xbzrle_cache_resize(value); | |
556 | } | |
557 | ||
558 | int64_t qmp_query_migrate_cache_size(Error **errp) | |
559 | { | |
560 | return migrate_xbzrle_cache_size(); | |
561 | } | |
562 | ||
3dc85383 | 563 | void qmp_migrate_set_speed(int64_t value, Error **errp) |
cab30143 | 564 | { |
cab30143 JQ |
565 | MigrationState *s; |
566 | ||
3dc85383 LC |
567 | if (value < 0) { |
568 | value = 0; | |
99a0db9b | 569 | } |
cab30143 | 570 | |
17549e84 | 571 | s = migrate_get_current(); |
3dc85383 | 572 | s->bandwidth_limit = value; |
d0ae46c1 | 573 | qemu_file_set_rate_limit(s->file, s->bandwidth_limit); |
cab30143 JQ |
574 | } |
575 | ||
4f0a993b | 576 | void qmp_migrate_set_downtime(double value, Error **errp) |
cab30143 | 577 | { |
4f0a993b LC |
578 | value *= 1e9; |
579 | value = MAX(0, MIN(UINT64_MAX, value)); | |
580 | max_downtime = (uint64_t)value; | |
99a0db9b | 581 | } |
17ad9b35 OW |
582 | |
583 | int migrate_use_xbzrle(void) | |
584 | { | |
585 | MigrationState *s; | |
586 | ||
587 | s = migrate_get_current(); | |
588 | ||
589 | return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE]; | |
590 | } | |
591 | ||
592 | int64_t migrate_xbzrle_cache_size(void) | |
593 | { | |
594 | MigrationState *s; | |
595 | ||
596 | s = migrate_get_current(); | |
597 | ||
598 | return s->xbzrle_cache_size; | |
599 | } |