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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" | |
d49b6836 | 17 | #include "qemu/error-report.h" |
6a1751b7 | 18 | #include "qemu/main-loop.h" |
caf71f86 | 19 | #include "migration/migration.h" |
83c9089e | 20 | #include "monitor/monitor.h" |
0d82d0e8 | 21 | #include "migration/qemu-file.h" |
9c17d615 | 22 | #include "sysemu/sysemu.h" |
737e150e | 23 | #include "block/block.h" |
1de7afc9 | 24 | #include "qemu/sockets.h" |
caf71f86 | 25 | #include "migration/block.h" |
766bd176 | 26 | #include "qemu/thread.h" |
791e7c82 | 27 | #include "qmp-commands.h" |
c09e5bb1 | 28 | #include "trace.h" |
065e2813 | 29 | |
d0ae46c1 | 30 | #define MAX_THROTTLE (32 << 20) /* Migration speed throttling */ |
5bb7910a | 31 | |
5b4e1eb7 JQ |
32 | /* Amount of time to allocate to each "chunk" of bandwidth-throttled |
33 | * data. */ | |
34 | #define BUFFER_DELAY 100 | |
35 | #define XFER_LIMIT_RATIO (1000 / BUFFER_DELAY) | |
36 | ||
8706d2d5 LL |
37 | /* Default compression thread count */ |
38 | #define DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT 8 | |
3fcb38c2 LL |
39 | /* Default decompression thread count, usually decompression is at |
40 | * least 4 times as fast as compression.*/ | |
41 | #define DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT 2 | |
8706d2d5 LL |
42 | /*0: means nocompress, 1: best speed, ... 9: best compress ratio */ |
43 | #define DEFAULT_MIGRATE_COMPRESS_LEVEL 1 | |
44 | ||
17ad9b35 OW |
45 | /* Migration XBZRLE default cache size */ |
46 | #define DEFAULT_MIGRATE_CACHE_SIZE (64 * 1024 * 1024) | |
47 | ||
99a0db9b GH |
48 | static NotifierList migration_state_notifiers = |
49 | NOTIFIER_LIST_INITIALIZER(migration_state_notifiers); | |
50 | ||
adde220a DDAG |
51 | static bool deferred_incoming; |
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 | ||
bca7856a | 57 | /* For outgoing */ |
859bc756 | 58 | MigrationState *migrate_get_current(void) |
17549e84 JQ |
59 | { |
60 | static MigrationState current_migration = { | |
31194731 | 61 | .state = MIGRATION_STATUS_NONE, |
d0ae46c1 | 62 | .bandwidth_limit = MAX_THROTTLE, |
17ad9b35 | 63 | .xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE, |
7e114f8c | 64 | .mbps = -1, |
43c60a81 LL |
65 | .parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = |
66 | DEFAULT_MIGRATE_COMPRESS_LEVEL, | |
67 | .parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = | |
68 | DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT, | |
69 | .parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = | |
70 | DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT, | |
17549e84 JQ |
71 | }; |
72 | ||
73 | return ¤t_migration; | |
74 | } | |
75 | ||
bca7856a DDAG |
76 | /* For incoming */ |
77 | static MigrationIncomingState *mis_current; | |
78 | ||
79 | MigrationIncomingState *migration_incoming_get_current(void) | |
80 | { | |
81 | return mis_current; | |
82 | } | |
83 | ||
84 | MigrationIncomingState *migration_incoming_state_new(QEMUFile* f) | |
85 | { | |
86 | mis_current = g_malloc0(sizeof(MigrationIncomingState)); | |
87 | mis_current->file = f; | |
1a8f46f8 | 88 | QLIST_INIT(&mis_current->loadvm_handlers); |
bca7856a DDAG |
89 | |
90 | return mis_current; | |
91 | } | |
92 | ||
93 | void migration_incoming_state_destroy(void) | |
94 | { | |
1a8f46f8 | 95 | loadvm_free_handlers(mis_current); |
bca7856a DDAG |
96 | g_free(mis_current); |
97 | mis_current = NULL; | |
98 | } | |
99 | ||
adde220a DDAG |
100 | /* |
101 | * Called on -incoming with a defer: uri. | |
102 | * The migration can be started later after any parameters have been | |
103 | * changed. | |
104 | */ | |
105 | static void deferred_incoming_migration(Error **errp) | |
106 | { | |
107 | if (deferred_incoming) { | |
108 | error_setg(errp, "Incoming migration already deferred"); | |
109 | } | |
110 | deferred_incoming = true; | |
111 | } | |
112 | ||
43eaae28 | 113 | void qemu_start_incoming_migration(const char *uri, Error **errp) |
5bb7910a | 114 | { |
34c9dd8e AL |
115 | const char *p; |
116 | ||
adde220a DDAG |
117 | if (!strcmp(uri, "defer")) { |
118 | deferred_incoming_migration(errp); | |
119 | } else if (strstart(uri, "tcp:", &p)) { | |
43eaae28 | 120 | tcp_start_incoming_migration(p, errp); |
2da776db | 121 | #ifdef CONFIG_RDMA |
adde220a | 122 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
123 | rdma_start_incoming_migration(p, errp); |
124 | #endif | |
065e2813 | 125 | #if !defined(WIN32) |
adde220a | 126 | } else if (strstart(uri, "exec:", &p)) { |
43eaae28 | 127 | exec_start_incoming_migration(p, errp); |
adde220a | 128 | } else if (strstart(uri, "unix:", &p)) { |
43eaae28 | 129 | unix_start_incoming_migration(p, errp); |
adde220a | 130 | } else if (strstart(uri, "fd:", &p)) { |
43eaae28 | 131 | fd_start_incoming_migration(p, errp); |
065e2813 | 132 | #endif |
adde220a | 133 | } else { |
312fd5f2 | 134 | error_setg(errp, "unknown migration protocol: %s", uri); |
8ca5e801 | 135 | } |
5bb7910a AL |
136 | } |
137 | ||
82a4da79 | 138 | static void process_incoming_migration_co(void *opaque) |
511c0231 | 139 | { |
82a4da79 | 140 | QEMUFile *f = opaque; |
5a8a30db | 141 | Error *local_err = NULL; |
1c12e1f5 PB |
142 | int ret; |
143 | ||
bca7856a DDAG |
144 | migration_incoming_state_new(f); |
145 | ||
1c12e1f5 | 146 | ret = qemu_loadvm_state(f); |
bca7856a | 147 | |
1c12e1f5 | 148 | qemu_fclose(f); |
905f26f2 | 149 | free_xbzrle_decoded_buf(); |
bca7856a DDAG |
150 | migration_incoming_state_destroy(); |
151 | ||
1c12e1f5 | 152 | if (ret < 0) { |
db80face | 153 | error_report("load of migration failed: %s", strerror(-ret)); |
3fcb38c2 | 154 | migrate_decompress_threads_join(); |
4aead692 | 155 | exit(EXIT_FAILURE); |
511c0231 JQ |
156 | } |
157 | qemu_announce_self(); | |
511c0231 | 158 | |
0f15423c | 159 | /* Make sure all file formats flush their mutable metadata */ |
5a8a30db KW |
160 | bdrv_invalidate_cache_all(&local_err); |
161 | if (local_err) { | |
97baf9d9 | 162 | error_report_err(local_err); |
3fcb38c2 | 163 | migrate_decompress_threads_join(); |
5a8a30db KW |
164 | exit(EXIT_FAILURE); |
165 | } | |
0f15423c | 166 | |
f5bbfba1 | 167 | if (autostart) { |
511c0231 | 168 | vm_start(); |
f5bbfba1 | 169 | } else { |
29ed72f1 | 170 | runstate_set(RUN_STATE_PAUSED); |
f5bbfba1 | 171 | } |
3fcb38c2 | 172 | migrate_decompress_threads_join(); |
511c0231 JQ |
173 | } |
174 | ||
82a4da79 PB |
175 | void process_incoming_migration(QEMUFile *f) |
176 | { | |
177 | Coroutine *co = qemu_coroutine_create(process_incoming_migration_co); | |
178 | int fd = qemu_get_fd(f); | |
179 | ||
180 | assert(fd != -1); | |
3fcb38c2 | 181 | migrate_decompress_threads_create(); |
f9e8cacc | 182 | qemu_set_nonblock(fd); |
82a4da79 PB |
183 | qemu_coroutine_enter(co, f); |
184 | } | |
185 | ||
a0a3fd60 GC |
186 | /* amount of nanoseconds we are willing to wait for migration to be down. |
187 | * the choice of nanoseconds is because it is the maximum resolution that | |
188 | * get_clock() can achieve. It is an internal measure. All user-visible | |
189 | * units must be in seconds */ | |
f7cd55a0 | 190 | static uint64_t max_downtime = 300000000; |
a0a3fd60 GC |
191 | |
192 | uint64_t migrate_max_downtime(void) | |
193 | { | |
194 | return max_downtime; | |
195 | } | |
196 | ||
bbf6da32 OW |
197 | MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) |
198 | { | |
199 | MigrationCapabilityStatusList *head = NULL; | |
200 | MigrationCapabilityStatusList *caps; | |
201 | MigrationState *s = migrate_get_current(); | |
202 | int i; | |
203 | ||
387eedeb | 204 | caps = NULL; /* silence compiler warning */ |
bbf6da32 OW |
205 | for (i = 0; i < MIGRATION_CAPABILITY_MAX; i++) { |
206 | if (head == NULL) { | |
207 | head = g_malloc0(sizeof(*caps)); | |
208 | caps = head; | |
209 | } else { | |
210 | caps->next = g_malloc0(sizeof(*caps)); | |
211 | caps = caps->next; | |
212 | } | |
213 | caps->value = | |
214 | g_malloc(sizeof(*caps->value)); | |
215 | caps->value->capability = i; | |
216 | caps->value->state = s->enabled_capabilities[i]; | |
217 | } | |
218 | ||
219 | return head; | |
220 | } | |
221 | ||
85de8323 LL |
222 | MigrationParameters *qmp_query_migrate_parameters(Error **errp) |
223 | { | |
224 | MigrationParameters *params; | |
225 | MigrationState *s = migrate_get_current(); | |
226 | ||
227 | params = g_malloc0(sizeof(*params)); | |
228 | params->compress_level = s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; | |
229 | params->compress_threads = | |
230 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; | |
231 | params->decompress_threads = | |
232 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; | |
233 | ||
234 | return params; | |
235 | } | |
236 | ||
f36d55af OW |
237 | static void get_xbzrle_cache_stats(MigrationInfo *info) |
238 | { | |
239 | if (migrate_use_xbzrle()) { | |
240 | info->has_xbzrle_cache = true; | |
241 | info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache)); | |
242 | info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size(); | |
243 | info->xbzrle_cache->bytes = xbzrle_mig_bytes_transferred(); | |
244 | info->xbzrle_cache->pages = xbzrle_mig_pages_transferred(); | |
245 | info->xbzrle_cache->cache_miss = xbzrle_mig_pages_cache_miss(); | |
8bc39233 | 246 | info->xbzrle_cache->cache_miss_rate = xbzrle_mig_cache_miss_rate(); |
f36d55af OW |
247 | info->xbzrle_cache->overflow = xbzrle_mig_pages_overflow(); |
248 | } | |
249 | } | |
250 | ||
791e7c82 | 251 | MigrationInfo *qmp_query_migrate(Error **errp) |
5bb7910a | 252 | { |
791e7c82 | 253 | MigrationInfo *info = g_malloc0(sizeof(*info)); |
17549e84 JQ |
254 | MigrationState *s = migrate_get_current(); |
255 | ||
256 | switch (s->state) { | |
31194731 | 257 | case MIGRATION_STATUS_NONE: |
17549e84 JQ |
258 | /* no migration has happened ever */ |
259 | break; | |
31194731 | 260 | case MIGRATION_STATUS_SETUP: |
29ae8a41 | 261 | info->has_status = true; |
ed4fbd10 | 262 | info->has_total_time = false; |
29ae8a41 | 263 | break; |
31194731 HZ |
264 | case MIGRATION_STATUS_ACTIVE: |
265 | case MIGRATION_STATUS_CANCELLING: | |
791e7c82 | 266 | info->has_status = true; |
7aa939af | 267 | info->has_total_time = true; |
bc72ad67 | 268 | info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) |
7aa939af | 269 | - s->total_time; |
2c52ddf1 JQ |
270 | info->has_expected_downtime = true; |
271 | info->expected_downtime = s->expected_downtime; | |
ed4fbd10 MH |
272 | info->has_setup_time = true; |
273 | info->setup_time = s->setup_time; | |
17549e84 | 274 | |
791e7c82 LC |
275 | info->has_ram = true; |
276 | info->ram = g_malloc0(sizeof(*info->ram)); | |
277 | info->ram->transferred = ram_bytes_transferred(); | |
278 | info->ram->remaining = ram_bytes_remaining(); | |
279 | info->ram->total = ram_bytes_total(); | |
004d4c10 | 280 | info->ram->duplicate = dup_mig_pages_transferred(); |
f1c72795 | 281 | info->ram->skipped = skipped_mig_pages_transferred(); |
004d4c10 OW |
282 | info->ram->normal = norm_mig_pages_transferred(); |
283 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
8d017193 | 284 | info->ram->dirty_pages_rate = s->dirty_pages_rate; |
7e114f8c | 285 | info->ram->mbps = s->mbps; |
58570ed8 | 286 | info->ram->dirty_sync_count = s->dirty_sync_count; |
8d017193 | 287 | |
17549e84 | 288 | if (blk_mig_active()) { |
791e7c82 LC |
289 | info->has_disk = true; |
290 | info->disk = g_malloc0(sizeof(*info->disk)); | |
291 | info->disk->transferred = blk_mig_bytes_transferred(); | |
292 | info->disk->remaining = blk_mig_bytes_remaining(); | |
293 | info->disk->total = blk_mig_bytes_total(); | |
ff8d81d8 | 294 | } |
f36d55af OW |
295 | |
296 | get_xbzrle_cache_stats(info); | |
17549e84 | 297 | break; |
31194731 | 298 | case MIGRATION_STATUS_COMPLETED: |
f36d55af OW |
299 | get_xbzrle_cache_stats(info); |
300 | ||
791e7c82 | 301 | info->has_status = true; |
00c14997 | 302 | info->has_total_time = true; |
7aa939af | 303 | info->total_time = s->total_time; |
9c5a9fcf JQ |
304 | info->has_downtime = true; |
305 | info->downtime = s->downtime; | |
ed4fbd10 MH |
306 | info->has_setup_time = true; |
307 | info->setup_time = s->setup_time; | |
d5f8a570 JQ |
308 | |
309 | info->has_ram = true; | |
310 | info->ram = g_malloc0(sizeof(*info->ram)); | |
311 | info->ram->transferred = ram_bytes_transferred(); | |
312 | info->ram->remaining = 0; | |
313 | info->ram->total = ram_bytes_total(); | |
004d4c10 | 314 | info->ram->duplicate = dup_mig_pages_transferred(); |
f1c72795 | 315 | info->ram->skipped = skipped_mig_pages_transferred(); |
004d4c10 OW |
316 | info->ram->normal = norm_mig_pages_transferred(); |
317 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
7e114f8c | 318 | info->ram->mbps = s->mbps; |
58570ed8 | 319 | info->ram->dirty_sync_count = s->dirty_sync_count; |
17549e84 | 320 | break; |
31194731 | 321 | case MIGRATION_STATUS_FAILED: |
791e7c82 | 322 | info->has_status = true; |
17549e84 | 323 | break; |
31194731 | 324 | case MIGRATION_STATUS_CANCELLED: |
791e7c82 | 325 | info->has_status = true; |
17549e84 | 326 | break; |
5bb7910a | 327 | } |
cde63fbe | 328 | info->status = s->state; |
791e7c82 LC |
329 | |
330 | return info; | |
5bb7910a AL |
331 | } |
332 | ||
00458433 OW |
333 | void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, |
334 | Error **errp) | |
335 | { | |
336 | MigrationState *s = migrate_get_current(); | |
337 | MigrationCapabilityStatusList *cap; | |
338 | ||
31194731 HZ |
339 | if (s->state == MIGRATION_STATUS_ACTIVE || |
340 | s->state == MIGRATION_STATUS_SETUP) { | |
c6bd8c70 | 341 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
00458433 OW |
342 | return; |
343 | } | |
344 | ||
345 | for (cap = params; cap; cap = cap->next) { | |
346 | s->enabled_capabilities[cap->value->capability] = cap->value->state; | |
347 | } | |
348 | } | |
349 | ||
85de8323 LL |
350 | void qmp_migrate_set_parameters(bool has_compress_level, |
351 | int64_t compress_level, | |
352 | bool has_compress_threads, | |
353 | int64_t compress_threads, | |
354 | bool has_decompress_threads, | |
355 | int64_t decompress_threads, Error **errp) | |
356 | { | |
357 | MigrationState *s = migrate_get_current(); | |
358 | ||
359 | if (has_compress_level && (compress_level < 0 || compress_level > 9)) { | |
c6bd8c70 MA |
360 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level", |
361 | "is invalid, it should be in the range of 0 to 9"); | |
85de8323 LL |
362 | return; |
363 | } | |
364 | if (has_compress_threads && | |
365 | (compress_threads < 1 || compress_threads > 255)) { | |
c6bd8c70 MA |
366 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
367 | "compress_threads", | |
368 | "is invalid, it should be in the range of 1 to 255"); | |
85de8323 LL |
369 | return; |
370 | } | |
371 | if (has_decompress_threads && | |
372 | (decompress_threads < 1 || decompress_threads > 255)) { | |
c6bd8c70 MA |
373 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
374 | "decompress_threads", | |
375 | "is invalid, it should be in the range of 1 to 255"); | |
85de8323 LL |
376 | return; |
377 | } | |
378 | ||
379 | if (has_compress_level) { | |
380 | s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = compress_level; | |
381 | } | |
382 | if (has_compress_threads) { | |
383 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = compress_threads; | |
384 | } | |
385 | if (has_decompress_threads) { | |
386 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = | |
387 | decompress_threads; | |
388 | } | |
389 | } | |
390 | ||
065e2813 AL |
391 | /* shared migration helpers */ |
392 | ||
51cf4c1a Z |
393 | static void migrate_set_state(MigrationState *s, int old_state, int new_state) |
394 | { | |
395 | if (atomic_cmpxchg(&s->state, old_state, new_state) == new_state) { | |
396 | trace_migrate_set_state(new_state); | |
397 | } | |
398 | } | |
399 | ||
bb1fadc4 | 400 | static void migrate_fd_cleanup(void *opaque) |
065e2813 | 401 | { |
bb1fadc4 PB |
402 | MigrationState *s = opaque; |
403 | ||
404 | qemu_bh_delete(s->cleanup_bh); | |
405 | s->cleanup_bh = NULL; | |
406 | ||
065e2813 | 407 | if (s->file) { |
9013dca5 | 408 | trace_migrate_fd_cleanup(); |
404a7c05 PB |
409 | qemu_mutex_unlock_iothread(); |
410 | qemu_thread_join(&s->thread); | |
411 | qemu_mutex_lock_iothread(); | |
412 | ||
8706d2d5 | 413 | migrate_compress_threads_join(); |
6f190a06 PB |
414 | qemu_fclose(s->file); |
415 | s->file = NULL; | |
065e2813 AL |
416 | } |
417 | ||
31194731 | 418 | assert(s->state != MIGRATION_STATUS_ACTIVE); |
7a2c1721 | 419 | |
31194731 | 420 | if (s->state != MIGRATION_STATUS_COMPLETED) { |
7a2c1721 | 421 | qemu_savevm_state_cancel(); |
31194731 HZ |
422 | if (s->state == MIGRATION_STATUS_CANCELLING) { |
423 | migrate_set_state(s, MIGRATION_STATUS_CANCELLING, | |
424 | MIGRATION_STATUS_CANCELLED); | |
51cf4c1a | 425 | } |
7a2c1721 | 426 | } |
a3fa1d78 PB |
427 | |
428 | notifier_list_notify(&migration_state_notifiers, s); | |
065e2813 AL |
429 | } |
430 | ||
8b6b99b3 | 431 | void migrate_fd_error(MigrationState *s) |
065e2813 | 432 | { |
9013dca5 | 433 | trace_migrate_fd_error(); |
bb1fadc4 | 434 | assert(s->file == NULL); |
31194731 HZ |
435 | s->state = MIGRATION_STATUS_FAILED; |
436 | trace_migrate_set_state(MIGRATION_STATUS_FAILED); | |
bb1fadc4 | 437 | notifier_list_notify(&migration_state_notifiers, s); |
458cf28e JQ |
438 | } |
439 | ||
0edda1c4 | 440 | static void migrate_fd_cancel(MigrationState *s) |
065e2813 | 441 | { |
6f2b811a | 442 | int old_state ; |
a26ba26e | 443 | QEMUFile *f = migrate_get_current()->file; |
9013dca5 | 444 | trace_migrate_fd_cancel(); |
065e2813 | 445 | |
6f2b811a Z |
446 | do { |
447 | old_state = s->state; | |
31194731 HZ |
448 | if (old_state != MIGRATION_STATUS_SETUP && |
449 | old_state != MIGRATION_STATUS_ACTIVE) { | |
6f2b811a Z |
450 | break; |
451 | } | |
31194731 HZ |
452 | migrate_set_state(s, old_state, MIGRATION_STATUS_CANCELLING); |
453 | } while (s->state != MIGRATION_STATUS_CANCELLING); | |
a26ba26e DDAG |
454 | |
455 | /* | |
456 | * If we're unlucky the migration code might be stuck somewhere in a | |
457 | * send/write while the network has failed and is waiting to timeout; | |
458 | * if we've got shutdown(2) available then we can force it to quit. | |
459 | * The outgoing qemu file gets closed in migrate_fd_cleanup that is | |
460 | * called in a bh, so there is no race against this cancel. | |
461 | */ | |
31194731 | 462 | if (s->state == MIGRATION_STATUS_CANCELLING && f) { |
a26ba26e DDAG |
463 | qemu_file_shutdown(f); |
464 | } | |
065e2813 AL |
465 | } |
466 | ||
99a0db9b GH |
467 | void add_migration_state_change_notifier(Notifier *notify) |
468 | { | |
469 | notifier_list_add(&migration_state_notifiers, notify); | |
470 | } | |
471 | ||
472 | void remove_migration_state_change_notifier(Notifier *notify) | |
473 | { | |
31552529 | 474 | notifier_remove(notify); |
99a0db9b GH |
475 | } |
476 | ||
02edd2e7 | 477 | bool migration_in_setup(MigrationState *s) |
afe2df69 | 478 | { |
31194731 | 479 | return s->state == MIGRATION_STATUS_SETUP; |
afe2df69 GH |
480 | } |
481 | ||
7073693b | 482 | bool migration_has_finished(MigrationState *s) |
99a0db9b | 483 | { |
31194731 | 484 | return s->state == MIGRATION_STATUS_COMPLETED; |
99a0db9b | 485 | } |
0edda1c4 | 486 | |
afe2df69 GH |
487 | bool migration_has_failed(MigrationState *s) |
488 | { | |
31194731 HZ |
489 | return (s->state == MIGRATION_STATUS_CANCELLED || |
490 | s->state == MIGRATION_STATUS_FAILED); | |
afe2df69 GH |
491 | } |
492 | ||
6607ae23 | 493 | static MigrationState *migrate_init(const MigrationParams *params) |
0edda1c4 | 494 | { |
17549e84 | 495 | MigrationState *s = migrate_get_current(); |
d0ae46c1 | 496 | int64_t bandwidth_limit = s->bandwidth_limit; |
bbf6da32 | 497 | bool enabled_capabilities[MIGRATION_CAPABILITY_MAX]; |
17ad9b35 | 498 | int64_t xbzrle_cache_size = s->xbzrle_cache_size; |
43c60a81 LL |
499 | int compress_level = s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; |
500 | int compress_thread_count = | |
501 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; | |
502 | int decompress_thread_count = | |
503 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; | |
bbf6da32 OW |
504 | |
505 | memcpy(enabled_capabilities, s->enabled_capabilities, | |
506 | sizeof(enabled_capabilities)); | |
0edda1c4 | 507 | |
17549e84 | 508 | memset(s, 0, sizeof(*s)); |
6607ae23 | 509 | s->params = *params; |
bbf6da32 OW |
510 | memcpy(s->enabled_capabilities, enabled_capabilities, |
511 | sizeof(enabled_capabilities)); | |
17ad9b35 | 512 | s->xbzrle_cache_size = xbzrle_cache_size; |
1299c631 | 513 | |
43c60a81 LL |
514 | s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = compress_level; |
515 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = | |
516 | compress_thread_count; | |
517 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = | |
518 | decompress_thread_count; | |
0edda1c4 | 519 | s->bandwidth_limit = bandwidth_limit; |
31194731 HZ |
520 | s->state = MIGRATION_STATUS_SETUP; |
521 | trace_migrate_set_state(MIGRATION_STATUS_SETUP); | |
0edda1c4 | 522 | |
bc72ad67 | 523 | s->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0edda1c4 JQ |
524 | return s; |
525 | } | |
cab30143 | 526 | |
fa2756b7 AL |
527 | static GSList *migration_blockers; |
528 | ||
529 | void migrate_add_blocker(Error *reason) | |
530 | { | |
531 | migration_blockers = g_slist_prepend(migration_blockers, reason); | |
532 | } | |
533 | ||
534 | void migrate_del_blocker(Error *reason) | |
535 | { | |
536 | migration_blockers = g_slist_remove(migration_blockers, reason); | |
537 | } | |
538 | ||
bf1ae1f4 DDAG |
539 | void qmp_migrate_incoming(const char *uri, Error **errp) |
540 | { | |
541 | Error *local_err = NULL; | |
4debb5f5 | 542 | static bool once = true; |
bf1ae1f4 DDAG |
543 | |
544 | if (!deferred_incoming) { | |
4debb5f5 | 545 | error_setg(errp, "For use with '-incoming defer'"); |
bf1ae1f4 DDAG |
546 | return; |
547 | } | |
4debb5f5 DDAG |
548 | if (!once) { |
549 | error_setg(errp, "The incoming migration has already been started"); | |
550 | } | |
bf1ae1f4 DDAG |
551 | |
552 | qemu_start_incoming_migration(uri, &local_err); | |
553 | ||
554 | if (local_err) { | |
555 | error_propagate(errp, local_err); | |
556 | return; | |
557 | } | |
558 | ||
4debb5f5 | 559 | once = false; |
bf1ae1f4 DDAG |
560 | } |
561 | ||
e1c37d0e LC |
562 | void qmp_migrate(const char *uri, bool has_blk, bool blk, |
563 | bool has_inc, bool inc, bool has_detach, bool detach, | |
564 | Error **errp) | |
cab30143 | 565 | { |
be7059cd | 566 | Error *local_err = NULL; |
17549e84 | 567 | MigrationState *s = migrate_get_current(); |
6607ae23 | 568 | MigrationParams params; |
cab30143 | 569 | const char *p; |
cab30143 | 570 | |
8c0426ae PP |
571 | params.blk = has_blk && blk; |
572 | params.shared = has_inc && inc; | |
6607ae23 | 573 | |
31194731 HZ |
574 | if (s->state == MIGRATION_STATUS_ACTIVE || |
575 | s->state == MIGRATION_STATUS_SETUP || | |
576 | s->state == MIGRATION_STATUS_CANCELLING) { | |
c6bd8c70 | 577 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
e1c37d0e | 578 | return; |
cab30143 JQ |
579 | } |
580 | ||
ca99993a DDAG |
581 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
582 | error_setg(errp, "Guest is waiting for an incoming migration"); | |
583 | return; | |
584 | } | |
585 | ||
e1c37d0e LC |
586 | if (qemu_savevm_state_blocked(errp)) { |
587 | return; | |
cab30143 JQ |
588 | } |
589 | ||
fa2756b7 | 590 | if (migration_blockers) { |
e1c37d0e LC |
591 | *errp = error_copy(migration_blockers->data); |
592 | return; | |
fa2756b7 AL |
593 | } |
594 | ||
6607ae23 | 595 | s = migrate_init(¶ms); |
cab30143 JQ |
596 | |
597 | if (strstart(uri, "tcp:", &p)) { | |
f37afb5a | 598 | tcp_start_outgoing_migration(s, p, &local_err); |
2da776db | 599 | #ifdef CONFIG_RDMA |
41310c68 | 600 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
601 | rdma_start_outgoing_migration(s, p, &local_err); |
602 | #endif | |
cab30143 JQ |
603 | #if !defined(WIN32) |
604 | } else if (strstart(uri, "exec:", &p)) { | |
f37afb5a | 605 | exec_start_outgoing_migration(s, p, &local_err); |
cab30143 | 606 | } else if (strstart(uri, "unix:", &p)) { |
f37afb5a | 607 | unix_start_outgoing_migration(s, p, &local_err); |
cab30143 | 608 | } else if (strstart(uri, "fd:", &p)) { |
f37afb5a | 609 | fd_start_outgoing_migration(s, p, &local_err); |
cab30143 | 610 | #endif |
99a0db9b | 611 | } else { |
c6bd8c70 MA |
612 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "uri", |
613 | "a valid migration protocol"); | |
31194731 | 614 | s->state = MIGRATION_STATUS_FAILED; |
e1c37d0e | 615 | return; |
cab30143 JQ |
616 | } |
617 | ||
f37afb5a | 618 | if (local_err) { |
342ab8d1 | 619 | migrate_fd_error(s); |
f37afb5a | 620 | error_propagate(errp, local_err); |
e1c37d0e | 621 | return; |
1299c631 | 622 | } |
cab30143 JQ |
623 | } |
624 | ||
6cdedb07 | 625 | void qmp_migrate_cancel(Error **errp) |
cab30143 | 626 | { |
17549e84 | 627 | migrate_fd_cancel(migrate_get_current()); |
cab30143 JQ |
628 | } |
629 | ||
9e1ba4cc OW |
630 | void qmp_migrate_set_cache_size(int64_t value, Error **errp) |
631 | { | |
632 | MigrationState *s = migrate_get_current(); | |
c91e681a | 633 | int64_t new_size; |
9e1ba4cc OW |
634 | |
635 | /* Check for truncation */ | |
636 | if (value != (size_t)value) { | |
c6bd8c70 MA |
637 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
638 | "exceeding address space"); | |
9e1ba4cc OW |
639 | return; |
640 | } | |
641 | ||
a5615b14 OW |
642 | /* Cache should not be larger than guest ram size */ |
643 | if (value > ram_bytes_total()) { | |
c6bd8c70 MA |
644 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
645 | "exceeds guest ram size "); | |
a5615b14 OW |
646 | return; |
647 | } | |
648 | ||
c91e681a OW |
649 | new_size = xbzrle_cache_resize(value); |
650 | if (new_size < 0) { | |
c6bd8c70 MA |
651 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
652 | "is smaller than page size"); | |
c91e681a OW |
653 | return; |
654 | } | |
655 | ||
656 | s->xbzrle_cache_size = new_size; | |
9e1ba4cc OW |
657 | } |
658 | ||
659 | int64_t qmp_query_migrate_cache_size(Error **errp) | |
660 | { | |
661 | return migrate_xbzrle_cache_size(); | |
662 | } | |
663 | ||
3dc85383 | 664 | void qmp_migrate_set_speed(int64_t value, Error **errp) |
cab30143 | 665 | { |
cab30143 JQ |
666 | MigrationState *s; |
667 | ||
3dc85383 LC |
668 | if (value < 0) { |
669 | value = 0; | |
99a0db9b | 670 | } |
442773ce PB |
671 | if (value > SIZE_MAX) { |
672 | value = SIZE_MAX; | |
673 | } | |
cab30143 | 674 | |
17549e84 | 675 | s = migrate_get_current(); |
3dc85383 | 676 | s->bandwidth_limit = value; |
442773ce PB |
677 | if (s->file) { |
678 | qemu_file_set_rate_limit(s->file, s->bandwidth_limit / XFER_LIMIT_RATIO); | |
679 | } | |
cab30143 JQ |
680 | } |
681 | ||
4f0a993b | 682 | void qmp_migrate_set_downtime(double value, Error **errp) |
cab30143 | 683 | { |
4f0a993b LC |
684 | value *= 1e9; |
685 | value = MAX(0, MIN(UINT64_MAX, value)); | |
686 | max_downtime = (uint64_t)value; | |
99a0db9b | 687 | } |
17ad9b35 | 688 | |
bde1e2ec CV |
689 | bool migrate_auto_converge(void) |
690 | { | |
691 | MigrationState *s; | |
692 | ||
693 | s = migrate_get_current(); | |
694 | ||
695 | return s->enabled_capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; | |
696 | } | |
697 | ||
323004a3 PL |
698 | bool migrate_zero_blocks(void) |
699 | { | |
700 | MigrationState *s; | |
701 | ||
702 | s = migrate_get_current(); | |
703 | ||
704 | return s->enabled_capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS]; | |
705 | } | |
706 | ||
8706d2d5 LL |
707 | bool migrate_use_compression(void) |
708 | { | |
dde4e694 LL |
709 | MigrationState *s; |
710 | ||
711 | s = migrate_get_current(); | |
712 | ||
713 | return s->enabled_capabilities[MIGRATION_CAPABILITY_COMPRESS]; | |
8706d2d5 LL |
714 | } |
715 | ||
716 | int migrate_compress_level(void) | |
717 | { | |
718 | MigrationState *s; | |
719 | ||
720 | s = migrate_get_current(); | |
721 | ||
43c60a81 | 722 | return s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; |
8706d2d5 LL |
723 | } |
724 | ||
725 | int migrate_compress_threads(void) | |
726 | { | |
727 | MigrationState *s; | |
728 | ||
729 | s = migrate_get_current(); | |
730 | ||
43c60a81 | 731 | return s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; |
8706d2d5 LL |
732 | } |
733 | ||
3fcb38c2 LL |
734 | int migrate_decompress_threads(void) |
735 | { | |
736 | MigrationState *s; | |
737 | ||
738 | s = migrate_get_current(); | |
739 | ||
43c60a81 | 740 | return s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; |
3fcb38c2 LL |
741 | } |
742 | ||
17ad9b35 OW |
743 | int migrate_use_xbzrle(void) |
744 | { | |
745 | MigrationState *s; | |
746 | ||
747 | s = migrate_get_current(); | |
748 | ||
749 | return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE]; | |
750 | } | |
751 | ||
752 | int64_t migrate_xbzrle_cache_size(void) | |
753 | { | |
754 | MigrationState *s; | |
755 | ||
756 | s = migrate_get_current(); | |
757 | ||
758 | return s->xbzrle_cache_size; | |
759 | } | |
0d82d0e8 JQ |
760 | |
761 | /* migration thread support */ | |
762 | ||
5f496a1b | 763 | static void *migration_thread(void *opaque) |
0d82d0e8 | 764 | { |
9848a404 | 765 | MigrationState *s = opaque; |
bc72ad67 AB |
766 | int64_t initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
767 | int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST); | |
be7172e2 | 768 | int64_t initial_bytes = 0; |
0d82d0e8 | 769 | int64_t max_size = 0; |
a3fa1d78 PB |
770 | int64_t start_time = initial_time; |
771 | bool old_vm_running = false; | |
76f5933a | 772 | |
f796baa1 | 773 | qemu_savevm_state_header(s->file); |
dba433c0 | 774 | qemu_savevm_state_begin(s->file, &s->params); |
0d82d0e8 | 775 | |
bc72ad67 | 776 | s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start; |
31194731 | 777 | migrate_set_state(s, MIGRATION_STATUS_SETUP, MIGRATION_STATUS_ACTIVE); |
29ae8a41 | 778 | |
31194731 | 779 | while (s->state == MIGRATION_STATUS_ACTIVE) { |
a3e879cd | 780 | int64_t current_time; |
c369f40d | 781 | uint64_t pending_size; |
0d82d0e8 | 782 | |
a0ff044b | 783 | if (!qemu_file_rate_limit(s->file)) { |
c369f40d | 784 | pending_size = qemu_savevm_state_pending(s->file, max_size); |
9013dca5 | 785 | trace_migrate_pending(pending_size, max_size); |
b22ff1fb | 786 | if (pending_size && pending_size >= max_size) { |
dba433c0 | 787 | qemu_savevm_state_iterate(s->file); |
c369f40d | 788 | } else { |
0e1146a7 KW |
789 | int ret; |
790 | ||
32c835ba | 791 | qemu_mutex_lock_iothread(); |
bc72ad67 | 792 | start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
c369f40d | 793 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER); |
a3fa1d78 | 794 | old_vm_running = runstate_is_running(); |
0e1146a7 KW |
795 | |
796 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); | |
797 | if (ret >= 0) { | |
40596834 | 798 | qemu_file_set_rate_limit(s->file, INT64_MAX); |
0e1146a7 KW |
799 | qemu_savevm_state_complete(s->file); |
800 | } | |
32c835ba | 801 | qemu_mutex_unlock_iothread(); |
0e1146a7 KW |
802 | |
803 | if (ret < 0) { | |
31194731 HZ |
804 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
805 | MIGRATION_STATUS_FAILED); | |
0e1146a7 KW |
806 | break; |
807 | } | |
808 | ||
059f896c | 809 | if (!qemu_file_get_error(s->file)) { |
31194731 HZ |
810 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
811 | MIGRATION_STATUS_COMPLETED); | |
059f896c PB |
812 | break; |
813 | } | |
c369f40d JQ |
814 | } |
815 | } | |
f4410a5d | 816 | |
fd45ee2c | 817 | if (qemu_file_get_error(s->file)) { |
31194731 HZ |
818 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
819 | MIGRATION_STATUS_FAILED); | |
fd45ee2c PB |
820 | break; |
821 | } | |
bc72ad67 | 822 | current_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0d82d0e8 | 823 | if (current_time >= initial_time + BUFFER_DELAY) { |
be7172e2 | 824 | uint64_t transferred_bytes = qemu_ftell(s->file) - initial_bytes; |
77417f10 | 825 | uint64_t time_spent = current_time - initial_time; |
0d82d0e8 JQ |
826 | double bandwidth = transferred_bytes / time_spent; |
827 | max_size = bandwidth * migrate_max_downtime() / 1000000; | |
828 | ||
7e114f8c MH |
829 | s->mbps = time_spent ? (((double) transferred_bytes * 8.0) / |
830 | ((double) time_spent / 1000.0)) / 1000.0 / 1000.0 : -1; | |
831 | ||
9013dca5 AK |
832 | trace_migrate_transferred(transferred_bytes, time_spent, |
833 | bandwidth, max_size); | |
90f8ae72 JQ |
834 | /* if we haven't sent anything, we don't want to recalculate |
835 | 10000 is a small enough number for our purposes */ | |
836 | if (s->dirty_bytes_rate && transferred_bytes > 10000) { | |
837 | s->expected_downtime = s->dirty_bytes_rate / bandwidth; | |
838 | } | |
0d82d0e8 | 839 | |
1964a397 | 840 | qemu_file_reset_rate_limit(s->file); |
0d82d0e8 | 841 | initial_time = current_time; |
be7172e2 | 842 | initial_bytes = qemu_ftell(s->file); |
0d82d0e8 | 843 | } |
a0ff044b | 844 | if (qemu_file_rate_limit(s->file)) { |
0d82d0e8 JQ |
845 | /* usleep expects microseconds */ |
846 | g_usleep((initial_time + BUFFER_DELAY - current_time)*1000); | |
847 | } | |
a3fa1d78 PB |
848 | } |
849 | ||
f4410a5d | 850 | qemu_mutex_lock_iothread(); |
31194731 | 851 | if (s->state == MIGRATION_STATUS_COMPLETED) { |
bc72ad67 | 852 | int64_t end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
d6ed7312 | 853 | uint64_t transferred_bytes = qemu_ftell(s->file); |
a3fa1d78 PB |
854 | s->total_time = end_time - s->total_time; |
855 | s->downtime = end_time - start_time; | |
d6ed7312 PL |
856 | if (s->total_time) { |
857 | s->mbps = (((double) transferred_bytes * 8.0) / | |
858 | ((double) s->total_time)) / 1000; | |
859 | } | |
a3fa1d78 PB |
860 | runstate_set(RUN_STATE_POSTMIGRATE); |
861 | } else { | |
862 | if (old_vm_running) { | |
a3fa1d78 | 863 | vm_start(); |
dba433c0 | 864 | } |
0d82d0e8 | 865 | } |
bb1fadc4 | 866 | qemu_bh_schedule(s->cleanup_bh); |
dba433c0 | 867 | qemu_mutex_unlock_iothread(); |
f4410a5d | 868 | |
0d82d0e8 JQ |
869 | return NULL; |
870 | } | |
871 | ||
9848a404 | 872 | void migrate_fd_connect(MigrationState *s) |
0d82d0e8 | 873 | { |
cc283e3b JQ |
874 | /* This is a best 1st approximation. ns to ms */ |
875 | s->expected_downtime = max_downtime/1000000; | |
bb1fadc4 | 876 | s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s); |
0d82d0e8 | 877 | |
442773ce PB |
878 | qemu_file_set_rate_limit(s->file, |
879 | s->bandwidth_limit / XFER_LIMIT_RATIO); | |
880 | ||
9287ac27 SH |
881 | /* Notify before starting migration thread */ |
882 | notifier_list_notify(&migration_state_notifiers, s); | |
883 | ||
8706d2d5 | 884 | migrate_compress_threads_create(); |
4900116e | 885 | qemu_thread_create(&s->thread, "migration", migration_thread, s, |
bb1fadc4 | 886 | QEMU_THREAD_JOINABLE); |
0d82d0e8 | 887 | } |