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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 | ||
e4ed1541 | 319 | bool migrate_fd_put_ready(MigrationState *s, uint64_t max_size) |
065e2813 AL |
320 | { |
321 | int ret; | |
e4ed1541 JQ |
322 | uint64_t pending_size; |
323 | bool last_round = false; | |
065e2813 | 324 | |
e7627482 | 325 | qemu_mutex_lock_iothread(); |
065e2813 | 326 | if (s->state != MIG_STATE_ACTIVE) { |
d0f2c4c6 | 327 | DPRINTF("put_ready returning because of non-active state\n"); |
e7627482 | 328 | qemu_mutex_unlock_iothread(); |
e4ed1541 | 329 | return false; |
065e2813 | 330 | } |
766bd176 JQ |
331 | if (s->first_time) { |
332 | s->first_time = false; | |
333 | DPRINTF("beginning savevm\n"); | |
334 | ret = qemu_savevm_state_begin(s->file, &s->params); | |
335 | if (ret < 0) { | |
336 | DPRINTF("failed, %d\n", ret); | |
337 | migrate_fd_error(s); | |
e7627482 | 338 | qemu_mutex_unlock_iothread(); |
e4ed1541 | 339 | return false; |
766bd176 JQ |
340 | } |
341 | } | |
065e2813 | 342 | |
d0f2c4c6 | 343 | DPRINTF("iterate\n"); |
e4ed1541 JQ |
344 | pending_size = qemu_savevm_state_pending(s->file, max_size); |
345 | DPRINTF("pending size %lu max %lu\n", pending_size, max_size); | |
346 | if (pending_size >= max_size) { | |
347 | ret = qemu_savevm_state_iterate(s->file); | |
348 | if (ret < 0) { | |
349 | migrate_fd_error(s); | |
350 | } | |
351 | } else { | |
1354869c | 352 | int old_vm_running = runstate_is_running(); |
9c5a9fcf | 353 | int64_t start_time, end_time; |
eeb34af9 | 354 | |
d0f2c4c6 | 355 | DPRINTF("done iterating\n"); |
9c5a9fcf | 356 | start_time = qemu_get_clock_ms(rt_clock); |
7b5d3aa2 | 357 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER); |
766bd176 JQ |
358 | if (old_vm_running) { |
359 | vm_stop(RUN_STATE_FINISH_MIGRATE); | |
360 | } else { | |
361 | vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); | |
362 | } | |
065e2813 | 363 | |
539de124 | 364 | if (qemu_savevm_state_complete(s->file) < 0) { |
67afff79 | 365 | migrate_fd_error(s); |
b161d123 | 366 | } else { |
458cf28e | 367 | migrate_fd_completed(s); |
b161d123 | 368 | } |
97d4d961 JQ |
369 | end_time = qemu_get_clock_ms(rt_clock); |
370 | s->total_time = end_time - s->total_time; | |
9c5a9fcf | 371 | s->downtime = end_time - start_time; |
48a2f4d6 | 372 | if (s->state != MIG_STATE_COMPLETED) { |
41ef56e6 AL |
373 | if (old_vm_running) { |
374 | vm_start(); | |
375 | } | |
f5bbfba1 | 376 | } |
e4ed1541 | 377 | last_round = true; |
065e2813 | 378 | } |
e7627482 JQ |
379 | qemu_mutex_unlock_iothread(); |
380 | ||
e4ed1541 | 381 | return last_round; |
065e2813 AL |
382 | } |
383 | ||
0edda1c4 | 384 | static void migrate_fd_cancel(MigrationState *s) |
065e2813 | 385 | { |
065e2813 AL |
386 | if (s->state != MIG_STATE_ACTIVE) |
387 | return; | |
388 | ||
d0f2c4c6 | 389 | DPRINTF("cancelling migration\n"); |
065e2813 AL |
390 | |
391 | s->state = MIG_STATE_CANCELLED; | |
e0eb7390 | 392 | notifier_list_notify(&migration_state_notifiers, s); |
539de124 | 393 | qemu_savevm_state_cancel(s->file); |
065e2813 AL |
394 | |
395 | migrate_fd_cleanup(s); | |
396 | } | |
397 | ||
11c76741 | 398 | int migrate_fd_close(MigrationState *s) |
065e2813 | 399 | { |
8dc592e6 PB |
400 | int rc = 0; |
401 | if (s->fd != -1) { | |
8dc592e6 PB |
402 | rc = s->close(s); |
403 | s->fd = -1; | |
404 | } | |
405 | return rc; | |
065e2813 | 406 | } |
99a0db9b GH |
407 | |
408 | void add_migration_state_change_notifier(Notifier *notify) | |
409 | { | |
410 | notifier_list_add(&migration_state_notifiers, notify); | |
411 | } | |
412 | ||
413 | void remove_migration_state_change_notifier(Notifier *notify) | |
414 | { | |
31552529 | 415 | notifier_remove(notify); |
99a0db9b GH |
416 | } |
417 | ||
afe2df69 GH |
418 | bool migration_is_active(MigrationState *s) |
419 | { | |
420 | return s->state == MIG_STATE_ACTIVE; | |
421 | } | |
422 | ||
7073693b | 423 | bool migration_has_finished(MigrationState *s) |
99a0db9b | 424 | { |
7073693b | 425 | return s->state == MIG_STATE_COMPLETED; |
99a0db9b | 426 | } |
0edda1c4 | 427 | |
afe2df69 GH |
428 | bool migration_has_failed(MigrationState *s) |
429 | { | |
430 | return (s->state == MIG_STATE_CANCELLED || | |
431 | s->state == MIG_STATE_ERROR); | |
432 | } | |
433 | ||
8b6b99b3 | 434 | void migrate_fd_connect(MigrationState *s) |
99a0db9b | 435 | { |
d5934dde | 436 | s->state = MIG_STATE_ACTIVE; |
766bd176 | 437 | s->first_time = true; |
edfa1af5 | 438 | qemu_fopen_ops_buffered(s); |
8b6b99b3 JQ |
439 | } |
440 | ||
6607ae23 | 441 | static MigrationState *migrate_init(const MigrationParams *params) |
0edda1c4 | 442 | { |
17549e84 | 443 | MigrationState *s = migrate_get_current(); |
d0ae46c1 | 444 | int64_t bandwidth_limit = s->bandwidth_limit; |
bbf6da32 | 445 | bool enabled_capabilities[MIGRATION_CAPABILITY_MAX]; |
17ad9b35 | 446 | int64_t xbzrle_cache_size = s->xbzrle_cache_size; |
bbf6da32 OW |
447 | |
448 | memcpy(enabled_capabilities, s->enabled_capabilities, | |
449 | sizeof(enabled_capabilities)); | |
0edda1c4 | 450 | |
17549e84 | 451 | memset(s, 0, sizeof(*s)); |
d0ae46c1 | 452 | s->bandwidth_limit = bandwidth_limit; |
6607ae23 | 453 | s->params = *params; |
bbf6da32 OW |
454 | memcpy(s->enabled_capabilities, enabled_capabilities, |
455 | sizeof(enabled_capabilities)); | |
17ad9b35 | 456 | s->xbzrle_cache_size = xbzrle_cache_size; |
1299c631 | 457 | |
0edda1c4 | 458 | s->bandwidth_limit = bandwidth_limit; |
d5934dde | 459 | s->state = MIG_STATE_SETUP; |
d5f8a570 | 460 | s->total_time = qemu_get_clock_ms(rt_clock); |
0edda1c4 | 461 | |
0edda1c4 JQ |
462 | return s; |
463 | } | |
cab30143 | 464 | |
fa2756b7 AL |
465 | static GSList *migration_blockers; |
466 | ||
467 | void migrate_add_blocker(Error *reason) | |
468 | { | |
469 | migration_blockers = g_slist_prepend(migration_blockers, reason); | |
470 | } | |
471 | ||
472 | void migrate_del_blocker(Error *reason) | |
473 | { | |
474 | migration_blockers = g_slist_remove(migration_blockers, reason); | |
475 | } | |
476 | ||
e1c37d0e LC |
477 | void qmp_migrate(const char *uri, bool has_blk, bool blk, |
478 | bool has_inc, bool inc, bool has_detach, bool detach, | |
479 | Error **errp) | |
cab30143 | 480 | { |
be7059cd | 481 | Error *local_err = NULL; |
17549e84 | 482 | MigrationState *s = migrate_get_current(); |
6607ae23 | 483 | MigrationParams params; |
cab30143 | 484 | const char *p; |
cab30143 | 485 | |
6607ae23 IY |
486 | params.blk = blk; |
487 | params.shared = inc; | |
488 | ||
17549e84 | 489 | if (s->state == MIG_STATE_ACTIVE) { |
e1c37d0e LC |
490 | error_set(errp, QERR_MIGRATION_ACTIVE); |
491 | return; | |
cab30143 JQ |
492 | } |
493 | ||
e1c37d0e LC |
494 | if (qemu_savevm_state_blocked(errp)) { |
495 | return; | |
cab30143 JQ |
496 | } |
497 | ||
fa2756b7 | 498 | if (migration_blockers) { |
e1c37d0e LC |
499 | *errp = error_copy(migration_blockers->data); |
500 | return; | |
fa2756b7 AL |
501 | } |
502 | ||
6607ae23 | 503 | s = migrate_init(¶ms); |
cab30143 JQ |
504 | |
505 | if (strstart(uri, "tcp:", &p)) { | |
f37afb5a | 506 | tcp_start_outgoing_migration(s, p, &local_err); |
cab30143 JQ |
507 | #if !defined(WIN32) |
508 | } else if (strstart(uri, "exec:", &p)) { | |
f37afb5a | 509 | exec_start_outgoing_migration(s, p, &local_err); |
cab30143 | 510 | } else if (strstart(uri, "unix:", &p)) { |
f37afb5a | 511 | unix_start_outgoing_migration(s, p, &local_err); |
cab30143 | 512 | } else if (strstart(uri, "fd:", &p)) { |
f37afb5a | 513 | fd_start_outgoing_migration(s, p, &local_err); |
cab30143 | 514 | #endif |
99a0db9b | 515 | } else { |
e1c37d0e LC |
516 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "uri", "a valid migration protocol"); |
517 | return; | |
cab30143 JQ |
518 | } |
519 | ||
f37afb5a | 520 | if (local_err) { |
342ab8d1 | 521 | migrate_fd_error(s); |
f37afb5a | 522 | error_propagate(errp, local_err); |
e1c37d0e | 523 | return; |
1299c631 JQ |
524 | } |
525 | ||
e0eb7390 | 526 | notifier_list_notify(&migration_state_notifiers, s); |
cab30143 JQ |
527 | } |
528 | ||
6cdedb07 | 529 | void qmp_migrate_cancel(Error **errp) |
cab30143 | 530 | { |
17549e84 | 531 | migrate_fd_cancel(migrate_get_current()); |
cab30143 JQ |
532 | } |
533 | ||
9e1ba4cc OW |
534 | void qmp_migrate_set_cache_size(int64_t value, Error **errp) |
535 | { | |
536 | MigrationState *s = migrate_get_current(); | |
537 | ||
538 | /* Check for truncation */ | |
539 | if (value != (size_t)value) { | |
540 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", | |
541 | "exceeding address space"); | |
542 | return; | |
543 | } | |
544 | ||
545 | s->xbzrle_cache_size = xbzrle_cache_resize(value); | |
546 | } | |
547 | ||
548 | int64_t qmp_query_migrate_cache_size(Error **errp) | |
549 | { | |
550 | return migrate_xbzrle_cache_size(); | |
551 | } | |
552 | ||
3dc85383 | 553 | void qmp_migrate_set_speed(int64_t value, Error **errp) |
cab30143 | 554 | { |
cab30143 JQ |
555 | MigrationState *s; |
556 | ||
3dc85383 LC |
557 | if (value < 0) { |
558 | value = 0; | |
99a0db9b | 559 | } |
cab30143 | 560 | |
17549e84 | 561 | s = migrate_get_current(); |
3dc85383 | 562 | s->bandwidth_limit = value; |
d0ae46c1 | 563 | qemu_file_set_rate_limit(s->file, s->bandwidth_limit); |
cab30143 JQ |
564 | } |
565 | ||
4f0a993b | 566 | void qmp_migrate_set_downtime(double value, Error **errp) |
cab30143 | 567 | { |
4f0a993b LC |
568 | value *= 1e9; |
569 | value = MAX(0, MIN(UINT64_MAX, value)); | |
570 | max_downtime = (uint64_t)value; | |
99a0db9b | 571 | } |
17ad9b35 OW |
572 | |
573 | int migrate_use_xbzrle(void) | |
574 | { | |
575 | MigrationState *s; | |
576 | ||
577 | s = migrate_get_current(); | |
578 | ||
579 | return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE]; | |
580 | } | |
581 | ||
582 | int64_t migrate_xbzrle_cache_size(void) | |
583 | { | |
584 | MigrationState *s; | |
585 | ||
586 | s = migrate_get_current(); | |
587 | ||
588 | return s->xbzrle_cache_size; | |
589 | } |