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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" | |
17 | #include "migration.h" | |
376253ec | 18 | #include "monitor.h" |
065e2813 AL |
19 | #include "buffered_file.h" |
20 | #include "sysemu.h" | |
21 | #include "block.h" | |
22 | #include "qemu_socket.h" | |
25f23643 | 23 | #include "block-migration.h" |
791e7c82 | 24 | #include "qmp-commands.h" |
065e2813 AL |
25 | |
26 | //#define DEBUG_MIGRATION | |
27 | ||
28 | #ifdef DEBUG_MIGRATION | |
d0f2c4c6 | 29 | #define DPRINTF(fmt, ...) \ |
065e2813 AL |
30 | do { printf("migration: " fmt, ## __VA_ARGS__); } while (0) |
31 | #else | |
d0f2c4c6 | 32 | #define DPRINTF(fmt, ...) \ |
065e2813 AL |
33 | do { } while (0) |
34 | #endif | |
5bb7910a | 35 | |
7dc688ed JQ |
36 | enum { |
37 | MIG_STATE_ERROR, | |
38 | MIG_STATE_SETUP, | |
39 | MIG_STATE_CANCELLED, | |
40 | MIG_STATE_ACTIVE, | |
41 | MIG_STATE_COMPLETED, | |
42 | }; | |
5bb7910a | 43 | |
d0ae46c1 | 44 | #define MAX_THROTTLE (32 << 20) /* Migration speed throttling */ |
5bb7910a | 45 | |
17ad9b35 OW |
46 | /* Migration XBZRLE default cache size */ |
47 | #define DEFAULT_MIGRATE_CACHE_SIZE (64 * 1024 * 1024) | |
48 | ||
99a0db9b GH |
49 | static NotifierList migration_state_notifiers = |
50 | NOTIFIER_LIST_INITIALIZER(migration_state_notifiers); | |
51 | ||
17549e84 JQ |
52 | /* When we add fault tolerance, we could have several |
53 | migrations at once. For now we don't need to add | |
54 | dynamic creation of migration */ | |
55 | ||
859bc756 | 56 | MigrationState *migrate_get_current(void) |
17549e84 JQ |
57 | { |
58 | static MigrationState current_migration = { | |
59 | .state = MIG_STATE_SETUP, | |
d0ae46c1 | 60 | .bandwidth_limit = MAX_THROTTLE, |
17ad9b35 | 61 | .xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE, |
17549e84 JQ |
62 | }; |
63 | ||
64 | return ¤t_migration; | |
65 | } | |
66 | ||
d5c5dacc | 67 | int qemu_start_incoming_migration(const char *uri, Error **errp) |
5bb7910a | 68 | { |
34c9dd8e | 69 | const char *p; |
8ca5e801 | 70 | int ret; |
34c9dd8e AL |
71 | |
72 | if (strstart(uri, "tcp:", &p)) | |
d5c5dacc | 73 | ret = tcp_start_incoming_migration(p, errp); |
065e2813 AL |
74 | #if !defined(WIN32) |
75 | else if (strstart(uri, "exec:", &p)) | |
8ca5e801 | 76 | ret = exec_start_incoming_migration(p); |
4951f65b | 77 | else if (strstart(uri, "unix:", &p)) |
8ca5e801 | 78 | ret = unix_start_incoming_migration(p); |
5ac1fad3 | 79 | else if (strstart(uri, "fd:", &p)) |
8ca5e801 | 80 | ret = fd_start_incoming_migration(p); |
065e2813 | 81 | #endif |
8ca5e801 | 82 | else { |
34c9dd8e | 83 | fprintf(stderr, "unknown migration protocol: %s\n", uri); |
8ca5e801 JQ |
84 | ret = -EPROTONOSUPPORT; |
85 | } | |
86 | return ret; | |
5bb7910a AL |
87 | } |
88 | ||
511c0231 JQ |
89 | void process_incoming_migration(QEMUFile *f) |
90 | { | |
91 | if (qemu_loadvm_state(f) < 0) { | |
92 | fprintf(stderr, "load of migration failed\n"); | |
93 | exit(0); | |
94 | } | |
95 | qemu_announce_self(); | |
96 | DPRINTF("successfully loaded vm state\n"); | |
97 | ||
901862cb | 98 | bdrv_clear_incoming_migration_all(); |
0f15423c AL |
99 | /* Make sure all file formats flush their mutable metadata */ |
100 | bdrv_invalidate_cache_all(); | |
101 | ||
f5bbfba1 | 102 | if (autostart) { |
511c0231 | 103 | vm_start(); |
f5bbfba1 | 104 | } else { |
0461d5a6 | 105 | runstate_set(RUN_STATE_PRELAUNCH); |
f5bbfba1 | 106 | } |
511c0231 JQ |
107 | } |
108 | ||
a0a3fd60 GC |
109 | /* amount of nanoseconds we are willing to wait for migration to be down. |
110 | * the choice of nanoseconds is because it is the maximum resolution that | |
111 | * get_clock() can achieve. It is an internal measure. All user-visible | |
112 | * units must be in seconds */ | |
113 | static uint64_t max_downtime = 30000000; | |
114 | ||
115 | uint64_t migrate_max_downtime(void) | |
116 | { | |
117 | return max_downtime; | |
118 | } | |
119 | ||
bbf6da32 OW |
120 | MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) |
121 | { | |
122 | MigrationCapabilityStatusList *head = NULL; | |
123 | MigrationCapabilityStatusList *caps; | |
124 | MigrationState *s = migrate_get_current(); | |
125 | int i; | |
126 | ||
127 | for (i = 0; i < MIGRATION_CAPABILITY_MAX; i++) { | |
128 | if (head == NULL) { | |
129 | head = g_malloc0(sizeof(*caps)); | |
130 | caps = head; | |
131 | } else { | |
132 | caps->next = g_malloc0(sizeof(*caps)); | |
133 | caps = caps->next; | |
134 | } | |
135 | caps->value = | |
136 | g_malloc(sizeof(*caps->value)); | |
137 | caps->value->capability = i; | |
138 | caps->value->state = s->enabled_capabilities[i]; | |
139 | } | |
140 | ||
141 | return head; | |
142 | } | |
143 | ||
f36d55af OW |
144 | static void get_xbzrle_cache_stats(MigrationInfo *info) |
145 | { | |
146 | if (migrate_use_xbzrle()) { | |
147 | info->has_xbzrle_cache = true; | |
148 | info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache)); | |
149 | info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size(); | |
150 | info->xbzrle_cache->bytes = xbzrle_mig_bytes_transferred(); | |
151 | info->xbzrle_cache->pages = xbzrle_mig_pages_transferred(); | |
152 | info->xbzrle_cache->cache_miss = xbzrle_mig_pages_cache_miss(); | |
153 | info->xbzrle_cache->overflow = xbzrle_mig_pages_overflow(); | |
154 | } | |
155 | } | |
156 | ||
791e7c82 | 157 | MigrationInfo *qmp_query_migrate(Error **errp) |
5bb7910a | 158 | { |
791e7c82 | 159 | MigrationInfo *info = g_malloc0(sizeof(*info)); |
17549e84 JQ |
160 | MigrationState *s = migrate_get_current(); |
161 | ||
162 | switch (s->state) { | |
163 | case MIG_STATE_SETUP: | |
164 | /* no migration has happened ever */ | |
165 | break; | |
166 | case MIG_STATE_ACTIVE: | |
791e7c82 LC |
167 | info->has_status = true; |
168 | info->status = g_strdup("active"); | |
7aa939af JQ |
169 | info->has_total_time = true; |
170 | info->total_time = qemu_get_clock_ms(rt_clock) | |
171 | - s->total_time; | |
17549e84 | 172 | |
791e7c82 LC |
173 | info->has_ram = true; |
174 | info->ram = g_malloc0(sizeof(*info->ram)); | |
175 | info->ram->transferred = ram_bytes_transferred(); | |
176 | info->ram->remaining = ram_bytes_remaining(); | |
177 | info->ram->total = ram_bytes_total(); | |
004d4c10 OW |
178 | info->ram->duplicate = dup_mig_pages_transferred(); |
179 | info->ram->normal = norm_mig_pages_transferred(); | |
180 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
17549e84 JQ |
181 | |
182 | if (blk_mig_active()) { | |
791e7c82 LC |
183 | info->has_disk = true; |
184 | info->disk = g_malloc0(sizeof(*info->disk)); | |
185 | info->disk->transferred = blk_mig_bytes_transferred(); | |
186 | info->disk->remaining = blk_mig_bytes_remaining(); | |
187 | info->disk->total = blk_mig_bytes_total(); | |
ff8d81d8 | 188 | } |
f36d55af OW |
189 | |
190 | get_xbzrle_cache_stats(info); | |
17549e84 JQ |
191 | break; |
192 | case MIG_STATE_COMPLETED: | |
f36d55af OW |
193 | get_xbzrle_cache_stats(info); |
194 | ||
791e7c82 LC |
195 | info->has_status = true; |
196 | info->status = g_strdup("completed"); | |
7aa939af | 197 | info->total_time = s->total_time; |
9c5a9fcf JQ |
198 | info->has_downtime = true; |
199 | info->downtime = s->downtime; | |
d5f8a570 JQ |
200 | |
201 | info->has_ram = true; | |
202 | info->ram = g_malloc0(sizeof(*info->ram)); | |
203 | info->ram->transferred = ram_bytes_transferred(); | |
204 | info->ram->remaining = 0; | |
205 | info->ram->total = ram_bytes_total(); | |
004d4c10 OW |
206 | info->ram->duplicate = dup_mig_pages_transferred(); |
207 | info->ram->normal = norm_mig_pages_transferred(); | |
208 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
17549e84 JQ |
209 | break; |
210 | case MIG_STATE_ERROR: | |
791e7c82 LC |
211 | info->has_status = true; |
212 | info->status = g_strdup("failed"); | |
17549e84 JQ |
213 | break; |
214 | case MIG_STATE_CANCELLED: | |
791e7c82 LC |
215 | info->has_status = true; |
216 | info->status = g_strdup("cancelled"); | |
17549e84 | 217 | break; |
5bb7910a | 218 | } |
791e7c82 LC |
219 | |
220 | return info; | |
5bb7910a AL |
221 | } |
222 | ||
00458433 OW |
223 | void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, |
224 | Error **errp) | |
225 | { | |
226 | MigrationState *s = migrate_get_current(); | |
227 | MigrationCapabilityStatusList *cap; | |
228 | ||
229 | if (s->state == MIG_STATE_ACTIVE) { | |
230 | error_set(errp, QERR_MIGRATION_ACTIVE); | |
231 | return; | |
232 | } | |
233 | ||
234 | for (cap = params; cap; cap = cap->next) { | |
235 | s->enabled_capabilities[cap->value->capability] = cap->value->state; | |
236 | } | |
237 | } | |
238 | ||
065e2813 AL |
239 | /* shared migration helpers */ |
240 | ||
8b6b99b3 | 241 | static int migrate_fd_cleanup(MigrationState *s) |
065e2813 | 242 | { |
41ef56e6 AL |
243 | int ret = 0; |
244 | ||
3202beca OW |
245 | if (s->fd != -1) { |
246 | qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL); | |
247 | } | |
065e2813 AL |
248 | |
249 | if (s->file) { | |
d0f2c4c6 | 250 | DPRINTF("closing file\n"); |
a6d34a94 | 251 | ret = qemu_fclose(s->file); |
5d39c799 | 252 | s->file = NULL; |
065e2813 AL |
253 | } |
254 | ||
84ec6552 | 255 | if (s->fd != -1) { |
065e2813 | 256 | close(s->fd); |
84ec6552 | 257 | s->fd = -1; |
f327aa0c | 258 | } |
065e2813 | 259 | |
41ef56e6 | 260 | return ret; |
065e2813 AL |
261 | } |
262 | ||
8b6b99b3 | 263 | void migrate_fd_error(MigrationState *s) |
065e2813 | 264 | { |
8b6b99b3 JQ |
265 | DPRINTF("setting error state\n"); |
266 | s->state = MIG_STATE_ERROR; | |
e0eb7390 | 267 | notifier_list_notify(&migration_state_notifiers, s); |
8b6b99b3 JQ |
268 | migrate_fd_cleanup(s); |
269 | } | |
270 | ||
458cf28e JQ |
271 | static void migrate_fd_completed(MigrationState *s) |
272 | { | |
273 | DPRINTF("setting completed state\n"); | |
274 | if (migrate_fd_cleanup(s) < 0) { | |
275 | s->state = MIG_STATE_ERROR; | |
276 | } else { | |
277 | s->state = MIG_STATE_COMPLETED; | |
278 | runstate_set(RUN_STATE_POSTMIGRATE); | |
279 | } | |
e0eb7390 | 280 | notifier_list_notify(&migration_state_notifiers, s); |
458cf28e JQ |
281 | } |
282 | ||
8b6b99b3 | 283 | static void migrate_fd_put_notify(void *opaque) |
065e2813 | 284 | { |
22f00a44 | 285 | MigrationState *s = opaque; |
065e2813 AL |
286 | |
287 | qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL); | |
288 | qemu_file_put_notify(s->file); | |
1fdc11c3 | 289 | if (s->file && qemu_file_get_error(s->file)) { |
2350e13c YT |
290 | migrate_fd_error(s); |
291 | } | |
065e2813 AL |
292 | } |
293 | ||
8b6b99b3 JQ |
294 | static ssize_t migrate_fd_put_buffer(void *opaque, const void *data, |
295 | size_t size) | |
065e2813 | 296 | { |
22f00a44 | 297 | MigrationState *s = opaque; |
065e2813 AL |
298 | ssize_t ret; |
299 | ||
fdbecb5d JQ |
300 | if (s->state != MIG_STATE_ACTIVE) { |
301 | return -EIO; | |
302 | } | |
303 | ||
065e2813 AL |
304 | do { |
305 | ret = s->write(s, data, size); | |
95b134ea | 306 | } while (ret == -1 && ((s->get_error(s)) == EINTR)); |
065e2813 AL |
307 | |
308 | if (ret == -1) | |
309 | ret = -(s->get_error(s)); | |
310 | ||
e447b1a6 | 311 | if (ret == -EAGAIN) { |
065e2813 | 312 | qemu_set_fd_handler2(s->fd, NULL, NULL, migrate_fd_put_notify, s); |
e447b1a6 | 313 | } |
065e2813 AL |
314 | |
315 | return ret; | |
316 | } | |
317 | ||
8b6b99b3 | 318 | static void migrate_fd_put_ready(void *opaque) |
065e2813 | 319 | { |
22f00a44 | 320 | MigrationState *s = opaque; |
065e2813 AL |
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 | } | |
327 | ||
d0f2c4c6 | 328 | DPRINTF("iterate\n"); |
539de124 | 329 | ret = qemu_savevm_state_iterate(s->file); |
39346385 JQ |
330 | if (ret < 0) { |
331 | migrate_fd_error(s); | |
332 | } else if (ret == 1) { | |
1354869c | 333 | int old_vm_running = runstate_is_running(); |
9c5a9fcf | 334 | int64_t start_time, end_time; |
eeb34af9 | 335 | |
d0f2c4c6 | 336 | DPRINTF("done iterating\n"); |
9c5a9fcf | 337 | start_time = qemu_get_clock_ms(rt_clock); |
7b5d3aa2 | 338 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER); |
8a9236f1 | 339 | vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); |
065e2813 | 340 | |
539de124 | 341 | if (qemu_savevm_state_complete(s->file) < 0) { |
67afff79 | 342 | migrate_fd_error(s); |
b161d123 | 343 | } else { |
458cf28e | 344 | migrate_fd_completed(s); |
b161d123 | 345 | } |
97d4d961 JQ |
346 | end_time = qemu_get_clock_ms(rt_clock); |
347 | s->total_time = end_time - s->total_time; | |
9c5a9fcf | 348 | s->downtime = end_time - start_time; |
48a2f4d6 | 349 | if (s->state != MIG_STATE_COMPLETED) { |
41ef56e6 AL |
350 | if (old_vm_running) { |
351 | vm_start(); | |
352 | } | |
f5bbfba1 | 353 | } |
065e2813 AL |
354 | } |
355 | } | |
356 | ||
0edda1c4 | 357 | static void migrate_fd_cancel(MigrationState *s) |
065e2813 | 358 | { |
065e2813 AL |
359 | if (s->state != MIG_STATE_ACTIVE) |
360 | return; | |
361 | ||
d0f2c4c6 | 362 | DPRINTF("cancelling migration\n"); |
065e2813 AL |
363 | |
364 | s->state = MIG_STATE_CANCELLED; | |
e0eb7390 | 365 | notifier_list_notify(&migration_state_notifiers, s); |
539de124 | 366 | qemu_savevm_state_cancel(s->file); |
065e2813 AL |
367 | |
368 | migrate_fd_cleanup(s); | |
369 | } | |
370 | ||
8b6b99b3 | 371 | static void migrate_fd_wait_for_unfreeze(void *opaque) |
065e2813 | 372 | { |
22f00a44 | 373 | MigrationState *s = opaque; |
065e2813 AL |
374 | int ret; |
375 | ||
d0f2c4c6 | 376 | DPRINTF("wait for unfreeze\n"); |
065e2813 AL |
377 | if (s->state != MIG_STATE_ACTIVE) |
378 | return; | |
379 | ||
380 | do { | |
381 | fd_set wfds; | |
382 | ||
383 | FD_ZERO(&wfds); | |
384 | FD_SET(s->fd, &wfds); | |
385 | ||
386 | ret = select(s->fd + 1, NULL, &wfds, NULL, NULL); | |
387 | } while (ret == -1 && (s->get_error(s)) == EINTR); | |
af509450 JQ |
388 | |
389 | if (ret == -1) { | |
dcd1d224 | 390 | qemu_file_set_error(s->file, -s->get_error(s)); |
af509450 | 391 | } |
065e2813 AL |
392 | } |
393 | ||
8b6b99b3 | 394 | static int migrate_fd_close(void *opaque) |
065e2813 | 395 | { |
22f00a44 | 396 | MigrationState *s = opaque; |
e19252d3 UL |
397 | |
398 | qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL); | |
065e2813 AL |
399 | return s->close(s); |
400 | } | |
99a0db9b GH |
401 | |
402 | void add_migration_state_change_notifier(Notifier *notify) | |
403 | { | |
404 | notifier_list_add(&migration_state_notifiers, notify); | |
405 | } | |
406 | ||
407 | void remove_migration_state_change_notifier(Notifier *notify) | |
408 | { | |
31552529 | 409 | notifier_remove(notify); |
99a0db9b GH |
410 | } |
411 | ||
afe2df69 GH |
412 | bool migration_is_active(MigrationState *s) |
413 | { | |
414 | return s->state == MIG_STATE_ACTIVE; | |
415 | } | |
416 | ||
7073693b | 417 | bool migration_has_finished(MigrationState *s) |
99a0db9b | 418 | { |
7073693b | 419 | return s->state == MIG_STATE_COMPLETED; |
99a0db9b | 420 | } |
0edda1c4 | 421 | |
afe2df69 GH |
422 | bool migration_has_failed(MigrationState *s) |
423 | { | |
424 | return (s->state == MIG_STATE_CANCELLED || | |
425 | s->state == MIG_STATE_ERROR); | |
426 | } | |
427 | ||
8b6b99b3 | 428 | void migrate_fd_connect(MigrationState *s) |
99a0db9b | 429 | { |
8b6b99b3 JQ |
430 | int ret; |
431 | ||
d5934dde | 432 | s->state = MIG_STATE_ACTIVE; |
8b6b99b3 JQ |
433 | s->file = qemu_fopen_ops_buffered(s, |
434 | s->bandwidth_limit, | |
435 | migrate_fd_put_buffer, | |
436 | migrate_fd_put_ready, | |
437 | migrate_fd_wait_for_unfreeze, | |
438 | migrate_fd_close); | |
439 | ||
440 | DPRINTF("beginning savevm\n"); | |
6607ae23 | 441 | ret = qemu_savevm_state_begin(s->file, &s->params); |
8b6b99b3 JQ |
442 | if (ret < 0) { |
443 | DPRINTF("failed, %d\n", ret); | |
444 | migrate_fd_error(s); | |
445 | return; | |
446 | } | |
447 | migrate_fd_put_ready(s); | |
448 | } | |
449 | ||
6607ae23 | 450 | static MigrationState *migrate_init(const MigrationParams *params) |
0edda1c4 | 451 | { |
17549e84 | 452 | MigrationState *s = migrate_get_current(); |
d0ae46c1 | 453 | int64_t bandwidth_limit = s->bandwidth_limit; |
bbf6da32 | 454 | bool enabled_capabilities[MIGRATION_CAPABILITY_MAX]; |
17ad9b35 | 455 | int64_t xbzrle_cache_size = s->xbzrle_cache_size; |
bbf6da32 OW |
456 | |
457 | memcpy(enabled_capabilities, s->enabled_capabilities, | |
458 | sizeof(enabled_capabilities)); | |
0edda1c4 | 459 | |
17549e84 | 460 | memset(s, 0, sizeof(*s)); |
d0ae46c1 | 461 | s->bandwidth_limit = bandwidth_limit; |
6607ae23 | 462 | s->params = *params; |
bbf6da32 OW |
463 | memcpy(s->enabled_capabilities, enabled_capabilities, |
464 | sizeof(enabled_capabilities)); | |
17ad9b35 | 465 | s->xbzrle_cache_size = xbzrle_cache_size; |
1299c631 | 466 | |
0edda1c4 | 467 | s->bandwidth_limit = bandwidth_limit; |
d5934dde | 468 | s->state = MIG_STATE_SETUP; |
d5f8a570 | 469 | s->total_time = qemu_get_clock_ms(rt_clock); |
0edda1c4 | 470 | |
0edda1c4 JQ |
471 | return s; |
472 | } | |
cab30143 | 473 | |
fa2756b7 AL |
474 | static GSList *migration_blockers; |
475 | ||
476 | void migrate_add_blocker(Error *reason) | |
477 | { | |
478 | migration_blockers = g_slist_prepend(migration_blockers, reason); | |
479 | } | |
480 | ||
481 | void migrate_del_blocker(Error *reason) | |
482 | { | |
483 | migration_blockers = g_slist_remove(migration_blockers, reason); | |
484 | } | |
485 | ||
e1c37d0e LC |
486 | void qmp_migrate(const char *uri, bool has_blk, bool blk, |
487 | bool has_inc, bool inc, bool has_detach, bool detach, | |
488 | Error **errp) | |
cab30143 | 489 | { |
17549e84 | 490 | MigrationState *s = migrate_get_current(); |
6607ae23 | 491 | MigrationParams params; |
cab30143 | 492 | const char *p; |
cab30143 JQ |
493 | int ret; |
494 | ||
6607ae23 IY |
495 | params.blk = blk; |
496 | params.shared = inc; | |
497 | ||
17549e84 | 498 | if (s->state == MIG_STATE_ACTIVE) { |
e1c37d0e LC |
499 | error_set(errp, QERR_MIGRATION_ACTIVE); |
500 | return; | |
cab30143 JQ |
501 | } |
502 | ||
e1c37d0e LC |
503 | if (qemu_savevm_state_blocked(errp)) { |
504 | return; | |
cab30143 JQ |
505 | } |
506 | ||
fa2756b7 | 507 | if (migration_blockers) { |
e1c37d0e LC |
508 | *errp = error_copy(migration_blockers->data); |
509 | return; | |
fa2756b7 AL |
510 | } |
511 | ||
6607ae23 | 512 | s = migrate_init(¶ms); |
cab30143 JQ |
513 | |
514 | if (strstart(uri, "tcp:", &p)) { | |
d5c5dacc | 515 | ret = tcp_start_outgoing_migration(s, p, errp); |
cab30143 JQ |
516 | #if !defined(WIN32) |
517 | } else if (strstart(uri, "exec:", &p)) { | |
518 | ret = exec_start_outgoing_migration(s, p); | |
519 | } else if (strstart(uri, "unix:", &p)) { | |
520 | ret = unix_start_outgoing_migration(s, p); | |
521 | } else if (strstart(uri, "fd:", &p)) { | |
522 | ret = fd_start_outgoing_migration(s, p); | |
523 | #endif | |
99a0db9b | 524 | } else { |
e1c37d0e LC |
525 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "uri", "a valid migration protocol"); |
526 | return; | |
cab30143 JQ |
527 | } |
528 | ||
529 | if (ret < 0) { | |
d5c5dacc AK |
530 | if (!error_is_set(errp)) { |
531 | DPRINTF("migration failed: %s\n", strerror(-ret)); | |
532 | /* FIXME: we should return meaningful errors */ | |
533 | error_set(errp, QERR_UNDEFINED_ERROR); | |
534 | } | |
e1c37d0e | 535 | return; |
1299c631 JQ |
536 | } |
537 | ||
e0eb7390 | 538 | notifier_list_notify(&migration_state_notifiers, s); |
cab30143 JQ |
539 | } |
540 | ||
6cdedb07 | 541 | void qmp_migrate_cancel(Error **errp) |
cab30143 | 542 | { |
17549e84 | 543 | migrate_fd_cancel(migrate_get_current()); |
cab30143 JQ |
544 | } |
545 | ||
9e1ba4cc OW |
546 | void qmp_migrate_set_cache_size(int64_t value, Error **errp) |
547 | { | |
548 | MigrationState *s = migrate_get_current(); | |
549 | ||
550 | /* Check for truncation */ | |
551 | if (value != (size_t)value) { | |
552 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", | |
553 | "exceeding address space"); | |
554 | return; | |
555 | } | |
556 | ||
557 | s->xbzrle_cache_size = xbzrle_cache_resize(value); | |
558 | } | |
559 | ||
560 | int64_t qmp_query_migrate_cache_size(Error **errp) | |
561 | { | |
562 | return migrate_xbzrle_cache_size(); | |
563 | } | |
564 | ||
3dc85383 | 565 | void qmp_migrate_set_speed(int64_t value, Error **errp) |
cab30143 | 566 | { |
cab30143 JQ |
567 | MigrationState *s; |
568 | ||
3dc85383 LC |
569 | if (value < 0) { |
570 | value = 0; | |
99a0db9b | 571 | } |
cab30143 | 572 | |
17549e84 | 573 | s = migrate_get_current(); |
3dc85383 | 574 | s->bandwidth_limit = value; |
d0ae46c1 | 575 | qemu_file_set_rate_limit(s->file, s->bandwidth_limit); |
cab30143 JQ |
576 | } |
577 | ||
4f0a993b | 578 | void qmp_migrate_set_downtime(double value, Error **errp) |
cab30143 | 579 | { |
4f0a993b LC |
580 | value *= 1e9; |
581 | value = MAX(0, MIN(UINT64_MAX, value)); | |
582 | max_downtime = (uint64_t)value; | |
99a0db9b | 583 | } |
17ad9b35 OW |
584 | |
585 | int migrate_use_xbzrle(void) | |
586 | { | |
587 | MigrationState *s; | |
588 | ||
589 | s = migrate_get_current(); | |
590 | ||
591 | return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE]; | |
592 | } | |
593 | ||
594 | int64_t migrate_xbzrle_cache_size(void) | |
595 | { | |
596 | MigrationState *s; | |
597 | ||
598 | s = migrate_get_current(); | |
599 | ||
600 | return s->xbzrle_cache_size; | |
601 | } |