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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" | |
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 | ||
8706d2d5 LL |
36 | /* Default compression thread count */ |
37 | #define DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT 8 | |
38 | /*0: means nocompress, 1: best speed, ... 9: best compress ratio */ | |
39 | #define DEFAULT_MIGRATE_COMPRESS_LEVEL 1 | |
40 | ||
17ad9b35 OW |
41 | /* Migration XBZRLE default cache size */ |
42 | #define DEFAULT_MIGRATE_CACHE_SIZE (64 * 1024 * 1024) | |
43 | ||
99a0db9b GH |
44 | static NotifierList migration_state_notifiers = |
45 | NOTIFIER_LIST_INITIALIZER(migration_state_notifiers); | |
46 | ||
adde220a DDAG |
47 | static bool deferred_incoming; |
48 | ||
17549e84 JQ |
49 | /* When we add fault tolerance, we could have several |
50 | migrations at once. For now we don't need to add | |
51 | dynamic creation of migration */ | |
52 | ||
859bc756 | 53 | MigrationState *migrate_get_current(void) |
17549e84 JQ |
54 | { |
55 | static MigrationState current_migration = { | |
31194731 | 56 | .state = MIGRATION_STATUS_NONE, |
d0ae46c1 | 57 | .bandwidth_limit = MAX_THROTTLE, |
17ad9b35 | 58 | .xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE, |
7e114f8c | 59 | .mbps = -1, |
8706d2d5 LL |
60 | .compress_thread_count = DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT, |
61 | .compress_level = DEFAULT_MIGRATE_COMPRESS_LEVEL, | |
17549e84 JQ |
62 | }; |
63 | ||
64 | return ¤t_migration; | |
65 | } | |
66 | ||
adde220a DDAG |
67 | /* |
68 | * Called on -incoming with a defer: uri. | |
69 | * The migration can be started later after any parameters have been | |
70 | * changed. | |
71 | */ | |
72 | static void deferred_incoming_migration(Error **errp) | |
73 | { | |
74 | if (deferred_incoming) { | |
75 | error_setg(errp, "Incoming migration already deferred"); | |
76 | } | |
77 | deferred_incoming = true; | |
78 | } | |
79 | ||
43eaae28 | 80 | void qemu_start_incoming_migration(const char *uri, Error **errp) |
5bb7910a | 81 | { |
34c9dd8e AL |
82 | const char *p; |
83 | ||
adde220a DDAG |
84 | if (!strcmp(uri, "defer")) { |
85 | deferred_incoming_migration(errp); | |
86 | } else if (strstart(uri, "tcp:", &p)) { | |
43eaae28 | 87 | tcp_start_incoming_migration(p, errp); |
2da776db | 88 | #ifdef CONFIG_RDMA |
adde220a | 89 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
90 | rdma_start_incoming_migration(p, errp); |
91 | #endif | |
065e2813 | 92 | #if !defined(WIN32) |
adde220a | 93 | } else if (strstart(uri, "exec:", &p)) { |
43eaae28 | 94 | exec_start_incoming_migration(p, errp); |
adde220a | 95 | } else if (strstart(uri, "unix:", &p)) { |
43eaae28 | 96 | unix_start_incoming_migration(p, errp); |
adde220a | 97 | } else if (strstart(uri, "fd:", &p)) { |
43eaae28 | 98 | fd_start_incoming_migration(p, errp); |
065e2813 | 99 | #endif |
adde220a | 100 | } else { |
312fd5f2 | 101 | error_setg(errp, "unknown migration protocol: %s", uri); |
8ca5e801 | 102 | } |
5bb7910a AL |
103 | } |
104 | ||
82a4da79 | 105 | static void process_incoming_migration_co(void *opaque) |
511c0231 | 106 | { |
82a4da79 | 107 | QEMUFile *f = opaque; |
5a8a30db | 108 | Error *local_err = NULL; |
1c12e1f5 PB |
109 | int ret; |
110 | ||
111 | ret = qemu_loadvm_state(f); | |
112 | qemu_fclose(f); | |
905f26f2 | 113 | free_xbzrle_decoded_buf(); |
1c12e1f5 | 114 | if (ret < 0) { |
db80face | 115 | error_report("load of migration failed: %s", strerror(-ret)); |
4aead692 | 116 | exit(EXIT_FAILURE); |
511c0231 JQ |
117 | } |
118 | qemu_announce_self(); | |
511c0231 | 119 | |
0f15423c | 120 | /* Make sure all file formats flush their mutable metadata */ |
5a8a30db KW |
121 | bdrv_invalidate_cache_all(&local_err); |
122 | if (local_err) { | |
97baf9d9 | 123 | error_report_err(local_err); |
5a8a30db KW |
124 | exit(EXIT_FAILURE); |
125 | } | |
0f15423c | 126 | |
f5bbfba1 | 127 | if (autostart) { |
511c0231 | 128 | vm_start(); |
f5bbfba1 | 129 | } else { |
29ed72f1 | 130 | runstate_set(RUN_STATE_PAUSED); |
f5bbfba1 | 131 | } |
511c0231 JQ |
132 | } |
133 | ||
82a4da79 PB |
134 | void process_incoming_migration(QEMUFile *f) |
135 | { | |
136 | Coroutine *co = qemu_coroutine_create(process_incoming_migration_co); | |
137 | int fd = qemu_get_fd(f); | |
138 | ||
139 | assert(fd != -1); | |
f9e8cacc | 140 | qemu_set_nonblock(fd); |
82a4da79 PB |
141 | qemu_coroutine_enter(co, f); |
142 | } | |
143 | ||
a0a3fd60 GC |
144 | /* amount of nanoseconds we are willing to wait for migration to be down. |
145 | * the choice of nanoseconds is because it is the maximum resolution that | |
146 | * get_clock() can achieve. It is an internal measure. All user-visible | |
147 | * units must be in seconds */ | |
f7cd55a0 | 148 | static uint64_t max_downtime = 300000000; |
a0a3fd60 GC |
149 | |
150 | uint64_t migrate_max_downtime(void) | |
151 | { | |
152 | return max_downtime; | |
153 | } | |
154 | ||
bbf6da32 OW |
155 | MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) |
156 | { | |
157 | MigrationCapabilityStatusList *head = NULL; | |
158 | MigrationCapabilityStatusList *caps; | |
159 | MigrationState *s = migrate_get_current(); | |
160 | int i; | |
161 | ||
387eedeb | 162 | caps = NULL; /* silence compiler warning */ |
bbf6da32 OW |
163 | for (i = 0; i < MIGRATION_CAPABILITY_MAX; i++) { |
164 | if (head == NULL) { | |
165 | head = g_malloc0(sizeof(*caps)); | |
166 | caps = head; | |
167 | } else { | |
168 | caps->next = g_malloc0(sizeof(*caps)); | |
169 | caps = caps->next; | |
170 | } | |
171 | caps->value = | |
172 | g_malloc(sizeof(*caps->value)); | |
173 | caps->value->capability = i; | |
174 | caps->value->state = s->enabled_capabilities[i]; | |
175 | } | |
176 | ||
177 | return head; | |
178 | } | |
179 | ||
f36d55af OW |
180 | static void get_xbzrle_cache_stats(MigrationInfo *info) |
181 | { | |
182 | if (migrate_use_xbzrle()) { | |
183 | info->has_xbzrle_cache = true; | |
184 | info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache)); | |
185 | info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size(); | |
186 | info->xbzrle_cache->bytes = xbzrle_mig_bytes_transferred(); | |
187 | info->xbzrle_cache->pages = xbzrle_mig_pages_transferred(); | |
188 | info->xbzrle_cache->cache_miss = xbzrle_mig_pages_cache_miss(); | |
8bc39233 | 189 | info->xbzrle_cache->cache_miss_rate = xbzrle_mig_cache_miss_rate(); |
f36d55af OW |
190 | info->xbzrle_cache->overflow = xbzrle_mig_pages_overflow(); |
191 | } | |
192 | } | |
193 | ||
791e7c82 | 194 | MigrationInfo *qmp_query_migrate(Error **errp) |
5bb7910a | 195 | { |
791e7c82 | 196 | MigrationInfo *info = g_malloc0(sizeof(*info)); |
17549e84 JQ |
197 | MigrationState *s = migrate_get_current(); |
198 | ||
199 | switch (s->state) { | |
31194731 | 200 | case MIGRATION_STATUS_NONE: |
17549e84 JQ |
201 | /* no migration has happened ever */ |
202 | break; | |
31194731 | 203 | case MIGRATION_STATUS_SETUP: |
29ae8a41 | 204 | info->has_status = true; |
ed4fbd10 | 205 | info->has_total_time = false; |
29ae8a41 | 206 | break; |
31194731 HZ |
207 | case MIGRATION_STATUS_ACTIVE: |
208 | case MIGRATION_STATUS_CANCELLING: | |
791e7c82 | 209 | info->has_status = true; |
7aa939af | 210 | info->has_total_time = true; |
bc72ad67 | 211 | info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) |
7aa939af | 212 | - s->total_time; |
2c52ddf1 JQ |
213 | info->has_expected_downtime = true; |
214 | info->expected_downtime = s->expected_downtime; | |
ed4fbd10 MH |
215 | info->has_setup_time = true; |
216 | info->setup_time = s->setup_time; | |
17549e84 | 217 | |
791e7c82 LC |
218 | info->has_ram = true; |
219 | info->ram = g_malloc0(sizeof(*info->ram)); | |
220 | info->ram->transferred = ram_bytes_transferred(); | |
221 | info->ram->remaining = ram_bytes_remaining(); | |
222 | info->ram->total = ram_bytes_total(); | |
004d4c10 | 223 | info->ram->duplicate = dup_mig_pages_transferred(); |
f1c72795 | 224 | info->ram->skipped = skipped_mig_pages_transferred(); |
004d4c10 OW |
225 | info->ram->normal = norm_mig_pages_transferred(); |
226 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
8d017193 | 227 | info->ram->dirty_pages_rate = s->dirty_pages_rate; |
7e114f8c | 228 | info->ram->mbps = s->mbps; |
58570ed8 | 229 | info->ram->dirty_sync_count = s->dirty_sync_count; |
8d017193 | 230 | |
17549e84 | 231 | if (blk_mig_active()) { |
791e7c82 LC |
232 | info->has_disk = true; |
233 | info->disk = g_malloc0(sizeof(*info->disk)); | |
234 | info->disk->transferred = blk_mig_bytes_transferred(); | |
235 | info->disk->remaining = blk_mig_bytes_remaining(); | |
236 | info->disk->total = blk_mig_bytes_total(); | |
ff8d81d8 | 237 | } |
f36d55af OW |
238 | |
239 | get_xbzrle_cache_stats(info); | |
17549e84 | 240 | break; |
31194731 | 241 | case MIGRATION_STATUS_COMPLETED: |
f36d55af OW |
242 | get_xbzrle_cache_stats(info); |
243 | ||
791e7c82 | 244 | info->has_status = true; |
00c14997 | 245 | info->has_total_time = true; |
7aa939af | 246 | info->total_time = s->total_time; |
9c5a9fcf JQ |
247 | info->has_downtime = true; |
248 | info->downtime = s->downtime; | |
ed4fbd10 MH |
249 | info->has_setup_time = true; |
250 | info->setup_time = s->setup_time; | |
d5f8a570 JQ |
251 | |
252 | info->has_ram = true; | |
253 | info->ram = g_malloc0(sizeof(*info->ram)); | |
254 | info->ram->transferred = ram_bytes_transferred(); | |
255 | info->ram->remaining = 0; | |
256 | info->ram->total = ram_bytes_total(); | |
004d4c10 | 257 | info->ram->duplicate = dup_mig_pages_transferred(); |
f1c72795 | 258 | info->ram->skipped = skipped_mig_pages_transferred(); |
004d4c10 OW |
259 | info->ram->normal = norm_mig_pages_transferred(); |
260 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
7e114f8c | 261 | info->ram->mbps = s->mbps; |
58570ed8 | 262 | info->ram->dirty_sync_count = s->dirty_sync_count; |
17549e84 | 263 | break; |
31194731 | 264 | case MIGRATION_STATUS_FAILED: |
791e7c82 | 265 | info->has_status = true; |
17549e84 | 266 | break; |
31194731 | 267 | case MIGRATION_STATUS_CANCELLED: |
791e7c82 | 268 | info->has_status = true; |
17549e84 | 269 | break; |
5bb7910a | 270 | } |
cde63fbe | 271 | info->status = s->state; |
791e7c82 LC |
272 | |
273 | return info; | |
5bb7910a AL |
274 | } |
275 | ||
00458433 OW |
276 | void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, |
277 | Error **errp) | |
278 | { | |
279 | MigrationState *s = migrate_get_current(); | |
280 | MigrationCapabilityStatusList *cap; | |
281 | ||
31194731 HZ |
282 | if (s->state == MIGRATION_STATUS_ACTIVE || |
283 | s->state == MIGRATION_STATUS_SETUP) { | |
00458433 OW |
284 | error_set(errp, QERR_MIGRATION_ACTIVE); |
285 | return; | |
286 | } | |
287 | ||
288 | for (cap = params; cap; cap = cap->next) { | |
289 | s->enabled_capabilities[cap->value->capability] = cap->value->state; | |
290 | } | |
291 | } | |
292 | ||
065e2813 AL |
293 | /* shared migration helpers */ |
294 | ||
51cf4c1a Z |
295 | static void migrate_set_state(MigrationState *s, int old_state, int new_state) |
296 | { | |
297 | if (atomic_cmpxchg(&s->state, old_state, new_state) == new_state) { | |
298 | trace_migrate_set_state(new_state); | |
299 | } | |
300 | } | |
301 | ||
bb1fadc4 | 302 | static void migrate_fd_cleanup(void *opaque) |
065e2813 | 303 | { |
bb1fadc4 PB |
304 | MigrationState *s = opaque; |
305 | ||
306 | qemu_bh_delete(s->cleanup_bh); | |
307 | s->cleanup_bh = NULL; | |
308 | ||
065e2813 | 309 | if (s->file) { |
9013dca5 | 310 | trace_migrate_fd_cleanup(); |
404a7c05 PB |
311 | qemu_mutex_unlock_iothread(); |
312 | qemu_thread_join(&s->thread); | |
313 | qemu_mutex_lock_iothread(); | |
314 | ||
8706d2d5 | 315 | migrate_compress_threads_join(); |
6f190a06 PB |
316 | qemu_fclose(s->file); |
317 | s->file = NULL; | |
065e2813 AL |
318 | } |
319 | ||
31194731 | 320 | assert(s->state != MIGRATION_STATUS_ACTIVE); |
7a2c1721 | 321 | |
31194731 | 322 | if (s->state != MIGRATION_STATUS_COMPLETED) { |
7a2c1721 | 323 | qemu_savevm_state_cancel(); |
31194731 HZ |
324 | if (s->state == MIGRATION_STATUS_CANCELLING) { |
325 | migrate_set_state(s, MIGRATION_STATUS_CANCELLING, | |
326 | MIGRATION_STATUS_CANCELLED); | |
51cf4c1a | 327 | } |
7a2c1721 | 328 | } |
a3fa1d78 PB |
329 | |
330 | notifier_list_notify(&migration_state_notifiers, s); | |
065e2813 AL |
331 | } |
332 | ||
8b6b99b3 | 333 | void migrate_fd_error(MigrationState *s) |
065e2813 | 334 | { |
9013dca5 | 335 | trace_migrate_fd_error(); |
bb1fadc4 | 336 | assert(s->file == NULL); |
31194731 HZ |
337 | s->state = MIGRATION_STATUS_FAILED; |
338 | trace_migrate_set_state(MIGRATION_STATUS_FAILED); | |
bb1fadc4 | 339 | notifier_list_notify(&migration_state_notifiers, s); |
458cf28e JQ |
340 | } |
341 | ||
0edda1c4 | 342 | static void migrate_fd_cancel(MigrationState *s) |
065e2813 | 343 | { |
6f2b811a | 344 | int old_state ; |
a26ba26e | 345 | QEMUFile *f = migrate_get_current()->file; |
9013dca5 | 346 | trace_migrate_fd_cancel(); |
065e2813 | 347 | |
6f2b811a Z |
348 | do { |
349 | old_state = s->state; | |
31194731 HZ |
350 | if (old_state != MIGRATION_STATUS_SETUP && |
351 | old_state != MIGRATION_STATUS_ACTIVE) { | |
6f2b811a Z |
352 | break; |
353 | } | |
31194731 HZ |
354 | migrate_set_state(s, old_state, MIGRATION_STATUS_CANCELLING); |
355 | } while (s->state != MIGRATION_STATUS_CANCELLING); | |
a26ba26e DDAG |
356 | |
357 | /* | |
358 | * If we're unlucky the migration code might be stuck somewhere in a | |
359 | * send/write while the network has failed and is waiting to timeout; | |
360 | * if we've got shutdown(2) available then we can force it to quit. | |
361 | * The outgoing qemu file gets closed in migrate_fd_cleanup that is | |
362 | * called in a bh, so there is no race against this cancel. | |
363 | */ | |
31194731 | 364 | if (s->state == MIGRATION_STATUS_CANCELLING && f) { |
a26ba26e DDAG |
365 | qemu_file_shutdown(f); |
366 | } | |
065e2813 AL |
367 | } |
368 | ||
99a0db9b GH |
369 | void add_migration_state_change_notifier(Notifier *notify) |
370 | { | |
371 | notifier_list_add(&migration_state_notifiers, notify); | |
372 | } | |
373 | ||
374 | void remove_migration_state_change_notifier(Notifier *notify) | |
375 | { | |
31552529 | 376 | notifier_remove(notify); |
99a0db9b GH |
377 | } |
378 | ||
02edd2e7 | 379 | bool migration_in_setup(MigrationState *s) |
afe2df69 | 380 | { |
31194731 | 381 | return s->state == MIGRATION_STATUS_SETUP; |
afe2df69 GH |
382 | } |
383 | ||
7073693b | 384 | bool migration_has_finished(MigrationState *s) |
99a0db9b | 385 | { |
31194731 | 386 | return s->state == MIGRATION_STATUS_COMPLETED; |
99a0db9b | 387 | } |
0edda1c4 | 388 | |
afe2df69 GH |
389 | bool migration_has_failed(MigrationState *s) |
390 | { | |
31194731 HZ |
391 | return (s->state == MIGRATION_STATUS_CANCELLED || |
392 | s->state == MIGRATION_STATUS_FAILED); | |
afe2df69 GH |
393 | } |
394 | ||
6607ae23 | 395 | static MigrationState *migrate_init(const MigrationParams *params) |
0edda1c4 | 396 | { |
17549e84 | 397 | MigrationState *s = migrate_get_current(); |
d0ae46c1 | 398 | int64_t bandwidth_limit = s->bandwidth_limit; |
bbf6da32 | 399 | bool enabled_capabilities[MIGRATION_CAPABILITY_MAX]; |
17ad9b35 | 400 | int64_t xbzrle_cache_size = s->xbzrle_cache_size; |
8706d2d5 LL |
401 | int compress_level = s->compress_level; |
402 | int compress_thread_count = s->compress_thread_count; | |
bbf6da32 OW |
403 | |
404 | memcpy(enabled_capabilities, s->enabled_capabilities, | |
405 | sizeof(enabled_capabilities)); | |
0edda1c4 | 406 | |
17549e84 | 407 | memset(s, 0, sizeof(*s)); |
6607ae23 | 408 | s->params = *params; |
bbf6da32 OW |
409 | memcpy(s->enabled_capabilities, enabled_capabilities, |
410 | sizeof(enabled_capabilities)); | |
17ad9b35 | 411 | s->xbzrle_cache_size = xbzrle_cache_size; |
1299c631 | 412 | |
8706d2d5 LL |
413 | s->compress_level = compress_level; |
414 | s->compress_thread_count = compress_thread_count; | |
0edda1c4 | 415 | s->bandwidth_limit = bandwidth_limit; |
31194731 HZ |
416 | s->state = MIGRATION_STATUS_SETUP; |
417 | trace_migrate_set_state(MIGRATION_STATUS_SETUP); | |
0edda1c4 | 418 | |
bc72ad67 | 419 | s->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0edda1c4 JQ |
420 | return s; |
421 | } | |
cab30143 | 422 | |
fa2756b7 AL |
423 | static GSList *migration_blockers; |
424 | ||
425 | void migrate_add_blocker(Error *reason) | |
426 | { | |
427 | migration_blockers = g_slist_prepend(migration_blockers, reason); | |
428 | } | |
429 | ||
430 | void migrate_del_blocker(Error *reason) | |
431 | { | |
432 | migration_blockers = g_slist_remove(migration_blockers, reason); | |
433 | } | |
434 | ||
bf1ae1f4 DDAG |
435 | void qmp_migrate_incoming(const char *uri, Error **errp) |
436 | { | |
437 | Error *local_err = NULL; | |
4debb5f5 | 438 | static bool once = true; |
bf1ae1f4 DDAG |
439 | |
440 | if (!deferred_incoming) { | |
4debb5f5 | 441 | error_setg(errp, "For use with '-incoming defer'"); |
bf1ae1f4 DDAG |
442 | return; |
443 | } | |
4debb5f5 DDAG |
444 | if (!once) { |
445 | error_setg(errp, "The incoming migration has already been started"); | |
446 | } | |
bf1ae1f4 DDAG |
447 | |
448 | qemu_start_incoming_migration(uri, &local_err); | |
449 | ||
450 | if (local_err) { | |
451 | error_propagate(errp, local_err); | |
452 | return; | |
453 | } | |
454 | ||
4debb5f5 | 455 | once = false; |
bf1ae1f4 DDAG |
456 | } |
457 | ||
e1c37d0e LC |
458 | void qmp_migrate(const char *uri, bool has_blk, bool blk, |
459 | bool has_inc, bool inc, bool has_detach, bool detach, | |
460 | Error **errp) | |
cab30143 | 461 | { |
be7059cd | 462 | Error *local_err = NULL; |
17549e84 | 463 | MigrationState *s = migrate_get_current(); |
6607ae23 | 464 | MigrationParams params; |
cab30143 | 465 | const char *p; |
cab30143 | 466 | |
8c0426ae PP |
467 | params.blk = has_blk && blk; |
468 | params.shared = has_inc && inc; | |
6607ae23 | 469 | |
31194731 HZ |
470 | if (s->state == MIGRATION_STATUS_ACTIVE || |
471 | s->state == MIGRATION_STATUS_SETUP || | |
472 | s->state == MIGRATION_STATUS_CANCELLING) { | |
e1c37d0e LC |
473 | error_set(errp, QERR_MIGRATION_ACTIVE); |
474 | return; | |
cab30143 JQ |
475 | } |
476 | ||
ca99993a DDAG |
477 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
478 | error_setg(errp, "Guest is waiting for an incoming migration"); | |
479 | return; | |
480 | } | |
481 | ||
e1c37d0e LC |
482 | if (qemu_savevm_state_blocked(errp)) { |
483 | return; | |
cab30143 JQ |
484 | } |
485 | ||
fa2756b7 | 486 | if (migration_blockers) { |
e1c37d0e LC |
487 | *errp = error_copy(migration_blockers->data); |
488 | return; | |
fa2756b7 AL |
489 | } |
490 | ||
6607ae23 | 491 | s = migrate_init(¶ms); |
cab30143 JQ |
492 | |
493 | if (strstart(uri, "tcp:", &p)) { | |
f37afb5a | 494 | tcp_start_outgoing_migration(s, p, &local_err); |
2da776db | 495 | #ifdef CONFIG_RDMA |
41310c68 | 496 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
497 | rdma_start_outgoing_migration(s, p, &local_err); |
498 | #endif | |
cab30143 JQ |
499 | #if !defined(WIN32) |
500 | } else if (strstart(uri, "exec:", &p)) { | |
f37afb5a | 501 | exec_start_outgoing_migration(s, p, &local_err); |
cab30143 | 502 | } else if (strstart(uri, "unix:", &p)) { |
f37afb5a | 503 | unix_start_outgoing_migration(s, p, &local_err); |
cab30143 | 504 | } else if (strstart(uri, "fd:", &p)) { |
f37afb5a | 505 | fd_start_outgoing_migration(s, p, &local_err); |
cab30143 | 506 | #endif |
99a0db9b | 507 | } else { |
e1c37d0e | 508 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "uri", "a valid migration protocol"); |
31194731 | 509 | s->state = MIGRATION_STATUS_FAILED; |
e1c37d0e | 510 | return; |
cab30143 JQ |
511 | } |
512 | ||
f37afb5a | 513 | if (local_err) { |
342ab8d1 | 514 | migrate_fd_error(s); |
f37afb5a | 515 | error_propagate(errp, local_err); |
e1c37d0e | 516 | return; |
1299c631 | 517 | } |
cab30143 JQ |
518 | } |
519 | ||
6cdedb07 | 520 | void qmp_migrate_cancel(Error **errp) |
cab30143 | 521 | { |
17549e84 | 522 | migrate_fd_cancel(migrate_get_current()); |
cab30143 JQ |
523 | } |
524 | ||
9e1ba4cc OW |
525 | void qmp_migrate_set_cache_size(int64_t value, Error **errp) |
526 | { | |
527 | MigrationState *s = migrate_get_current(); | |
c91e681a | 528 | int64_t new_size; |
9e1ba4cc OW |
529 | |
530 | /* Check for truncation */ | |
531 | if (value != (size_t)value) { | |
532 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", | |
533 | "exceeding address space"); | |
534 | return; | |
535 | } | |
536 | ||
a5615b14 OW |
537 | /* Cache should not be larger than guest ram size */ |
538 | if (value > ram_bytes_total()) { | |
539 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", | |
540 | "exceeds guest ram size "); | |
541 | return; | |
542 | } | |
543 | ||
c91e681a OW |
544 | new_size = xbzrle_cache_resize(value); |
545 | if (new_size < 0) { | |
546 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", | |
547 | "is smaller than page size"); | |
548 | return; | |
549 | } | |
550 | ||
551 | s->xbzrle_cache_size = new_size; | |
9e1ba4cc OW |
552 | } |
553 | ||
554 | int64_t qmp_query_migrate_cache_size(Error **errp) | |
555 | { | |
556 | return migrate_xbzrle_cache_size(); | |
557 | } | |
558 | ||
3dc85383 | 559 | void qmp_migrate_set_speed(int64_t value, Error **errp) |
cab30143 | 560 | { |
cab30143 JQ |
561 | MigrationState *s; |
562 | ||
3dc85383 LC |
563 | if (value < 0) { |
564 | value = 0; | |
99a0db9b | 565 | } |
442773ce PB |
566 | if (value > SIZE_MAX) { |
567 | value = SIZE_MAX; | |
568 | } | |
cab30143 | 569 | |
17549e84 | 570 | s = migrate_get_current(); |
3dc85383 | 571 | s->bandwidth_limit = value; |
442773ce PB |
572 | if (s->file) { |
573 | qemu_file_set_rate_limit(s->file, s->bandwidth_limit / XFER_LIMIT_RATIO); | |
574 | } | |
cab30143 JQ |
575 | } |
576 | ||
4f0a993b | 577 | void qmp_migrate_set_downtime(double value, Error **errp) |
cab30143 | 578 | { |
4f0a993b LC |
579 | value *= 1e9; |
580 | value = MAX(0, MIN(UINT64_MAX, value)); | |
581 | max_downtime = (uint64_t)value; | |
99a0db9b | 582 | } |
17ad9b35 | 583 | |
bde1e2ec CV |
584 | bool migrate_auto_converge(void) |
585 | { | |
586 | MigrationState *s; | |
587 | ||
588 | s = migrate_get_current(); | |
589 | ||
590 | return s->enabled_capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; | |
591 | } | |
592 | ||
323004a3 PL |
593 | bool migrate_zero_blocks(void) |
594 | { | |
595 | MigrationState *s; | |
596 | ||
597 | s = migrate_get_current(); | |
598 | ||
599 | return s->enabled_capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS]; | |
600 | } | |
601 | ||
8706d2d5 LL |
602 | bool migrate_use_compression(void) |
603 | { | |
604 | /* Disable compression before the patch series are applied */ | |
605 | return false; | |
606 | } | |
607 | ||
608 | int migrate_compress_level(void) | |
609 | { | |
610 | MigrationState *s; | |
611 | ||
612 | s = migrate_get_current(); | |
613 | ||
614 | return s->compress_level; | |
615 | } | |
616 | ||
617 | int migrate_compress_threads(void) | |
618 | { | |
619 | MigrationState *s; | |
620 | ||
621 | s = migrate_get_current(); | |
622 | ||
623 | return s->compress_thread_count; | |
624 | } | |
625 | ||
17ad9b35 OW |
626 | int migrate_use_xbzrle(void) |
627 | { | |
628 | MigrationState *s; | |
629 | ||
630 | s = migrate_get_current(); | |
631 | ||
632 | return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE]; | |
633 | } | |
634 | ||
635 | int64_t migrate_xbzrle_cache_size(void) | |
636 | { | |
637 | MigrationState *s; | |
638 | ||
639 | s = migrate_get_current(); | |
640 | ||
641 | return s->xbzrle_cache_size; | |
642 | } | |
0d82d0e8 JQ |
643 | |
644 | /* migration thread support */ | |
645 | ||
5f496a1b | 646 | static void *migration_thread(void *opaque) |
0d82d0e8 | 647 | { |
9848a404 | 648 | MigrationState *s = opaque; |
bc72ad67 AB |
649 | int64_t initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
650 | int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST); | |
be7172e2 | 651 | int64_t initial_bytes = 0; |
0d82d0e8 | 652 | int64_t max_size = 0; |
a3fa1d78 PB |
653 | int64_t start_time = initial_time; |
654 | bool old_vm_running = false; | |
76f5933a | 655 | |
dba433c0 | 656 | qemu_savevm_state_begin(s->file, &s->params); |
0d82d0e8 | 657 | |
bc72ad67 | 658 | s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start; |
31194731 | 659 | migrate_set_state(s, MIGRATION_STATUS_SETUP, MIGRATION_STATUS_ACTIVE); |
29ae8a41 | 660 | |
31194731 | 661 | while (s->state == MIGRATION_STATUS_ACTIVE) { |
a3e879cd | 662 | int64_t current_time; |
c369f40d | 663 | uint64_t pending_size; |
0d82d0e8 | 664 | |
a0ff044b | 665 | if (!qemu_file_rate_limit(s->file)) { |
c369f40d | 666 | pending_size = qemu_savevm_state_pending(s->file, max_size); |
9013dca5 | 667 | trace_migrate_pending(pending_size, max_size); |
b22ff1fb | 668 | if (pending_size && pending_size >= max_size) { |
dba433c0 | 669 | qemu_savevm_state_iterate(s->file); |
c369f40d | 670 | } else { |
0e1146a7 KW |
671 | int ret; |
672 | ||
32c835ba | 673 | qemu_mutex_lock_iothread(); |
bc72ad67 | 674 | start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
c369f40d | 675 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER); |
a3fa1d78 | 676 | old_vm_running = runstate_is_running(); |
0e1146a7 KW |
677 | |
678 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); | |
679 | if (ret >= 0) { | |
40596834 | 680 | qemu_file_set_rate_limit(s->file, INT64_MAX); |
0e1146a7 KW |
681 | qemu_savevm_state_complete(s->file); |
682 | } | |
32c835ba | 683 | qemu_mutex_unlock_iothread(); |
0e1146a7 KW |
684 | |
685 | if (ret < 0) { | |
31194731 HZ |
686 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
687 | MIGRATION_STATUS_FAILED); | |
0e1146a7 KW |
688 | break; |
689 | } | |
690 | ||
059f896c | 691 | if (!qemu_file_get_error(s->file)) { |
31194731 HZ |
692 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
693 | MIGRATION_STATUS_COMPLETED); | |
059f896c PB |
694 | break; |
695 | } | |
c369f40d JQ |
696 | } |
697 | } | |
f4410a5d | 698 | |
fd45ee2c | 699 | if (qemu_file_get_error(s->file)) { |
31194731 HZ |
700 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
701 | MIGRATION_STATUS_FAILED); | |
fd45ee2c PB |
702 | break; |
703 | } | |
bc72ad67 | 704 | current_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0d82d0e8 | 705 | if (current_time >= initial_time + BUFFER_DELAY) { |
be7172e2 | 706 | uint64_t transferred_bytes = qemu_ftell(s->file) - initial_bytes; |
77417f10 | 707 | uint64_t time_spent = current_time - initial_time; |
0d82d0e8 JQ |
708 | double bandwidth = transferred_bytes / time_spent; |
709 | max_size = bandwidth * migrate_max_downtime() / 1000000; | |
710 | ||
7e114f8c MH |
711 | s->mbps = time_spent ? (((double) transferred_bytes * 8.0) / |
712 | ((double) time_spent / 1000.0)) / 1000.0 / 1000.0 : -1; | |
713 | ||
9013dca5 AK |
714 | trace_migrate_transferred(transferred_bytes, time_spent, |
715 | bandwidth, max_size); | |
90f8ae72 JQ |
716 | /* if we haven't sent anything, we don't want to recalculate |
717 | 10000 is a small enough number for our purposes */ | |
718 | if (s->dirty_bytes_rate && transferred_bytes > 10000) { | |
719 | s->expected_downtime = s->dirty_bytes_rate / bandwidth; | |
720 | } | |
0d82d0e8 | 721 | |
1964a397 | 722 | qemu_file_reset_rate_limit(s->file); |
0d82d0e8 | 723 | initial_time = current_time; |
be7172e2 | 724 | initial_bytes = qemu_ftell(s->file); |
0d82d0e8 | 725 | } |
a0ff044b | 726 | if (qemu_file_rate_limit(s->file)) { |
0d82d0e8 JQ |
727 | /* usleep expects microseconds */ |
728 | g_usleep((initial_time + BUFFER_DELAY - current_time)*1000); | |
729 | } | |
a3fa1d78 PB |
730 | } |
731 | ||
f4410a5d | 732 | qemu_mutex_lock_iothread(); |
31194731 | 733 | if (s->state == MIGRATION_STATUS_COMPLETED) { |
bc72ad67 | 734 | int64_t end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
d6ed7312 | 735 | uint64_t transferred_bytes = qemu_ftell(s->file); |
a3fa1d78 PB |
736 | s->total_time = end_time - s->total_time; |
737 | s->downtime = end_time - start_time; | |
d6ed7312 PL |
738 | if (s->total_time) { |
739 | s->mbps = (((double) transferred_bytes * 8.0) / | |
740 | ((double) s->total_time)) / 1000; | |
741 | } | |
a3fa1d78 PB |
742 | runstate_set(RUN_STATE_POSTMIGRATE); |
743 | } else { | |
744 | if (old_vm_running) { | |
a3fa1d78 | 745 | vm_start(); |
dba433c0 | 746 | } |
0d82d0e8 | 747 | } |
bb1fadc4 | 748 | qemu_bh_schedule(s->cleanup_bh); |
dba433c0 | 749 | qemu_mutex_unlock_iothread(); |
f4410a5d | 750 | |
0d82d0e8 JQ |
751 | return NULL; |
752 | } | |
753 | ||
9848a404 | 754 | void migrate_fd_connect(MigrationState *s) |
0d82d0e8 | 755 | { |
31194731 HZ |
756 | s->state = MIGRATION_STATUS_SETUP; |
757 | trace_migrate_set_state(MIGRATION_STATUS_SETUP); | |
c09e5bb1 | 758 | |
cc283e3b JQ |
759 | /* This is a best 1st approximation. ns to ms */ |
760 | s->expected_downtime = max_downtime/1000000; | |
bb1fadc4 | 761 | s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s); |
0d82d0e8 | 762 | |
442773ce PB |
763 | qemu_file_set_rate_limit(s->file, |
764 | s->bandwidth_limit / XFER_LIMIT_RATIO); | |
765 | ||
9287ac27 SH |
766 | /* Notify before starting migration thread */ |
767 | notifier_list_notify(&migration_state_notifiers, s); | |
768 | ||
8706d2d5 | 769 | migrate_compress_threads_create(); |
4900116e | 770 | qemu_thread_create(&s->thread, "migration", migration_thread, s, |
bb1fadc4 | 771 | QEMU_THREAD_JOINABLE); |
0d82d0e8 | 772 | } |