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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 | |
3fcb38c2 LL |
38 | /* Default decompression thread count, usually decompression is at |
39 | * least 4 times as fast as compression.*/ | |
40 | #define DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT 2 | |
8706d2d5 LL |
41 | /*0: means nocompress, 1: best speed, ... 9: best compress ratio */ |
42 | #define DEFAULT_MIGRATE_COMPRESS_LEVEL 1 | |
43 | ||
17ad9b35 OW |
44 | /* Migration XBZRLE default cache size */ |
45 | #define DEFAULT_MIGRATE_CACHE_SIZE (64 * 1024 * 1024) | |
46 | ||
99a0db9b GH |
47 | static NotifierList migration_state_notifiers = |
48 | NOTIFIER_LIST_INITIALIZER(migration_state_notifiers); | |
49 | ||
adde220a DDAG |
50 | static bool deferred_incoming; |
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 | ||
bca7856a | 56 | /* For outgoing */ |
859bc756 | 57 | MigrationState *migrate_get_current(void) |
17549e84 JQ |
58 | { |
59 | static MigrationState current_migration = { | |
31194731 | 60 | .state = MIGRATION_STATUS_NONE, |
d0ae46c1 | 61 | .bandwidth_limit = MAX_THROTTLE, |
17ad9b35 | 62 | .xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE, |
7e114f8c | 63 | .mbps = -1, |
43c60a81 LL |
64 | .parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = |
65 | DEFAULT_MIGRATE_COMPRESS_LEVEL, | |
66 | .parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = | |
67 | DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT, | |
68 | .parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = | |
69 | DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT, | |
17549e84 JQ |
70 | }; |
71 | ||
72 | return ¤t_migration; | |
73 | } | |
74 | ||
bca7856a DDAG |
75 | /* For incoming */ |
76 | static MigrationIncomingState *mis_current; | |
77 | ||
78 | MigrationIncomingState *migration_incoming_get_current(void) | |
79 | { | |
80 | return mis_current; | |
81 | } | |
82 | ||
83 | MigrationIncomingState *migration_incoming_state_new(QEMUFile* f) | |
84 | { | |
85 | mis_current = g_malloc0(sizeof(MigrationIncomingState)); | |
86 | mis_current->file = f; | |
1a8f46f8 | 87 | QLIST_INIT(&mis_current->loadvm_handlers); |
bca7856a DDAG |
88 | |
89 | return mis_current; | |
90 | } | |
91 | ||
92 | void migration_incoming_state_destroy(void) | |
93 | { | |
1a8f46f8 | 94 | loadvm_free_handlers(mis_current); |
bca7856a DDAG |
95 | g_free(mis_current); |
96 | mis_current = NULL; | |
97 | } | |
98 | ||
adde220a DDAG |
99 | /* |
100 | * Called on -incoming with a defer: uri. | |
101 | * The migration can be started later after any parameters have been | |
102 | * changed. | |
103 | */ | |
104 | static void deferred_incoming_migration(Error **errp) | |
105 | { | |
106 | if (deferred_incoming) { | |
107 | error_setg(errp, "Incoming migration already deferred"); | |
108 | } | |
109 | deferred_incoming = true; | |
110 | } | |
111 | ||
43eaae28 | 112 | void qemu_start_incoming_migration(const char *uri, Error **errp) |
5bb7910a | 113 | { |
34c9dd8e AL |
114 | const char *p; |
115 | ||
adde220a DDAG |
116 | if (!strcmp(uri, "defer")) { |
117 | deferred_incoming_migration(errp); | |
118 | } else if (strstart(uri, "tcp:", &p)) { | |
43eaae28 | 119 | tcp_start_incoming_migration(p, errp); |
2da776db | 120 | #ifdef CONFIG_RDMA |
adde220a | 121 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
122 | rdma_start_incoming_migration(p, errp); |
123 | #endif | |
065e2813 | 124 | #if !defined(WIN32) |
adde220a | 125 | } else if (strstart(uri, "exec:", &p)) { |
43eaae28 | 126 | exec_start_incoming_migration(p, errp); |
adde220a | 127 | } else if (strstart(uri, "unix:", &p)) { |
43eaae28 | 128 | unix_start_incoming_migration(p, errp); |
adde220a | 129 | } else if (strstart(uri, "fd:", &p)) { |
43eaae28 | 130 | fd_start_incoming_migration(p, errp); |
065e2813 | 131 | #endif |
adde220a | 132 | } else { |
312fd5f2 | 133 | error_setg(errp, "unknown migration protocol: %s", uri); |
8ca5e801 | 134 | } |
5bb7910a AL |
135 | } |
136 | ||
82a4da79 | 137 | static void process_incoming_migration_co(void *opaque) |
511c0231 | 138 | { |
82a4da79 | 139 | QEMUFile *f = opaque; |
5a8a30db | 140 | Error *local_err = NULL; |
1c12e1f5 PB |
141 | int ret; |
142 | ||
bca7856a DDAG |
143 | migration_incoming_state_new(f); |
144 | ||
1c12e1f5 | 145 | ret = qemu_loadvm_state(f); |
bca7856a | 146 | |
1c12e1f5 | 147 | qemu_fclose(f); |
905f26f2 | 148 | free_xbzrle_decoded_buf(); |
bca7856a DDAG |
149 | migration_incoming_state_destroy(); |
150 | ||
1c12e1f5 | 151 | if (ret < 0) { |
db80face | 152 | error_report("load of migration failed: %s", strerror(-ret)); |
3fcb38c2 | 153 | migrate_decompress_threads_join(); |
4aead692 | 154 | exit(EXIT_FAILURE); |
511c0231 JQ |
155 | } |
156 | qemu_announce_self(); | |
511c0231 | 157 | |
0f15423c | 158 | /* Make sure all file formats flush their mutable metadata */ |
5a8a30db KW |
159 | bdrv_invalidate_cache_all(&local_err); |
160 | if (local_err) { | |
97baf9d9 | 161 | error_report_err(local_err); |
3fcb38c2 | 162 | migrate_decompress_threads_join(); |
5a8a30db KW |
163 | exit(EXIT_FAILURE); |
164 | } | |
0f15423c | 165 | |
f5bbfba1 | 166 | if (autostart) { |
511c0231 | 167 | vm_start(); |
f5bbfba1 | 168 | } else { |
29ed72f1 | 169 | runstate_set(RUN_STATE_PAUSED); |
f5bbfba1 | 170 | } |
3fcb38c2 | 171 | migrate_decompress_threads_join(); |
511c0231 JQ |
172 | } |
173 | ||
82a4da79 PB |
174 | void process_incoming_migration(QEMUFile *f) |
175 | { | |
176 | Coroutine *co = qemu_coroutine_create(process_incoming_migration_co); | |
177 | int fd = qemu_get_fd(f); | |
178 | ||
179 | assert(fd != -1); | |
3fcb38c2 | 180 | migrate_decompress_threads_create(); |
f9e8cacc | 181 | qemu_set_nonblock(fd); |
82a4da79 PB |
182 | qemu_coroutine_enter(co, f); |
183 | } | |
184 | ||
a0a3fd60 GC |
185 | /* amount of nanoseconds we are willing to wait for migration to be down. |
186 | * the choice of nanoseconds is because it is the maximum resolution that | |
187 | * get_clock() can achieve. It is an internal measure. All user-visible | |
188 | * units must be in seconds */ | |
f7cd55a0 | 189 | static uint64_t max_downtime = 300000000; |
a0a3fd60 GC |
190 | |
191 | uint64_t migrate_max_downtime(void) | |
192 | { | |
193 | return max_downtime; | |
194 | } | |
195 | ||
bbf6da32 OW |
196 | MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) |
197 | { | |
198 | MigrationCapabilityStatusList *head = NULL; | |
199 | MigrationCapabilityStatusList *caps; | |
200 | MigrationState *s = migrate_get_current(); | |
201 | int i; | |
202 | ||
387eedeb | 203 | caps = NULL; /* silence compiler warning */ |
bbf6da32 OW |
204 | for (i = 0; i < MIGRATION_CAPABILITY_MAX; i++) { |
205 | if (head == NULL) { | |
206 | head = g_malloc0(sizeof(*caps)); | |
207 | caps = head; | |
208 | } else { | |
209 | caps->next = g_malloc0(sizeof(*caps)); | |
210 | caps = caps->next; | |
211 | } | |
212 | caps->value = | |
213 | g_malloc(sizeof(*caps->value)); | |
214 | caps->value->capability = i; | |
215 | caps->value->state = s->enabled_capabilities[i]; | |
216 | } | |
217 | ||
218 | return head; | |
219 | } | |
220 | ||
85de8323 LL |
221 | MigrationParameters *qmp_query_migrate_parameters(Error **errp) |
222 | { | |
223 | MigrationParameters *params; | |
224 | MigrationState *s = migrate_get_current(); | |
225 | ||
226 | params = g_malloc0(sizeof(*params)); | |
227 | params->compress_level = s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; | |
228 | params->compress_threads = | |
229 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; | |
230 | params->decompress_threads = | |
231 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; | |
232 | ||
233 | return params; | |
234 | } | |
235 | ||
f36d55af OW |
236 | static void get_xbzrle_cache_stats(MigrationInfo *info) |
237 | { | |
238 | if (migrate_use_xbzrle()) { | |
239 | info->has_xbzrle_cache = true; | |
240 | info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache)); | |
241 | info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size(); | |
242 | info->xbzrle_cache->bytes = xbzrle_mig_bytes_transferred(); | |
243 | info->xbzrle_cache->pages = xbzrle_mig_pages_transferred(); | |
244 | info->xbzrle_cache->cache_miss = xbzrle_mig_pages_cache_miss(); | |
8bc39233 | 245 | info->xbzrle_cache->cache_miss_rate = xbzrle_mig_cache_miss_rate(); |
f36d55af OW |
246 | info->xbzrle_cache->overflow = xbzrle_mig_pages_overflow(); |
247 | } | |
248 | } | |
249 | ||
791e7c82 | 250 | MigrationInfo *qmp_query_migrate(Error **errp) |
5bb7910a | 251 | { |
791e7c82 | 252 | MigrationInfo *info = g_malloc0(sizeof(*info)); |
17549e84 JQ |
253 | MigrationState *s = migrate_get_current(); |
254 | ||
255 | switch (s->state) { | |
31194731 | 256 | case MIGRATION_STATUS_NONE: |
17549e84 JQ |
257 | /* no migration has happened ever */ |
258 | break; | |
31194731 | 259 | case MIGRATION_STATUS_SETUP: |
29ae8a41 | 260 | info->has_status = true; |
ed4fbd10 | 261 | info->has_total_time = false; |
29ae8a41 | 262 | break; |
31194731 HZ |
263 | case MIGRATION_STATUS_ACTIVE: |
264 | case MIGRATION_STATUS_CANCELLING: | |
791e7c82 | 265 | info->has_status = true; |
7aa939af | 266 | info->has_total_time = true; |
bc72ad67 | 267 | info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) |
7aa939af | 268 | - s->total_time; |
2c52ddf1 JQ |
269 | info->has_expected_downtime = true; |
270 | info->expected_downtime = s->expected_downtime; | |
ed4fbd10 MH |
271 | info->has_setup_time = true; |
272 | info->setup_time = s->setup_time; | |
17549e84 | 273 | |
791e7c82 LC |
274 | info->has_ram = true; |
275 | info->ram = g_malloc0(sizeof(*info->ram)); | |
276 | info->ram->transferred = ram_bytes_transferred(); | |
277 | info->ram->remaining = ram_bytes_remaining(); | |
278 | info->ram->total = ram_bytes_total(); | |
004d4c10 | 279 | info->ram->duplicate = dup_mig_pages_transferred(); |
f1c72795 | 280 | info->ram->skipped = skipped_mig_pages_transferred(); |
004d4c10 OW |
281 | info->ram->normal = norm_mig_pages_transferred(); |
282 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
8d017193 | 283 | info->ram->dirty_pages_rate = s->dirty_pages_rate; |
7e114f8c | 284 | info->ram->mbps = s->mbps; |
58570ed8 | 285 | info->ram->dirty_sync_count = s->dirty_sync_count; |
8d017193 | 286 | |
17549e84 | 287 | if (blk_mig_active()) { |
791e7c82 LC |
288 | info->has_disk = true; |
289 | info->disk = g_malloc0(sizeof(*info->disk)); | |
290 | info->disk->transferred = blk_mig_bytes_transferred(); | |
291 | info->disk->remaining = blk_mig_bytes_remaining(); | |
292 | info->disk->total = blk_mig_bytes_total(); | |
ff8d81d8 | 293 | } |
f36d55af OW |
294 | |
295 | get_xbzrle_cache_stats(info); | |
17549e84 | 296 | break; |
31194731 | 297 | case MIGRATION_STATUS_COMPLETED: |
f36d55af OW |
298 | get_xbzrle_cache_stats(info); |
299 | ||
791e7c82 | 300 | info->has_status = true; |
00c14997 | 301 | info->has_total_time = true; |
7aa939af | 302 | info->total_time = s->total_time; |
9c5a9fcf JQ |
303 | info->has_downtime = true; |
304 | info->downtime = s->downtime; | |
ed4fbd10 MH |
305 | info->has_setup_time = true; |
306 | info->setup_time = s->setup_time; | |
d5f8a570 JQ |
307 | |
308 | info->has_ram = true; | |
309 | info->ram = g_malloc0(sizeof(*info->ram)); | |
310 | info->ram->transferred = ram_bytes_transferred(); | |
311 | info->ram->remaining = 0; | |
312 | info->ram->total = ram_bytes_total(); | |
004d4c10 | 313 | info->ram->duplicate = dup_mig_pages_transferred(); |
f1c72795 | 314 | info->ram->skipped = skipped_mig_pages_transferred(); |
004d4c10 OW |
315 | info->ram->normal = norm_mig_pages_transferred(); |
316 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
7e114f8c | 317 | info->ram->mbps = s->mbps; |
58570ed8 | 318 | info->ram->dirty_sync_count = s->dirty_sync_count; |
17549e84 | 319 | break; |
31194731 | 320 | case MIGRATION_STATUS_FAILED: |
791e7c82 | 321 | info->has_status = true; |
17549e84 | 322 | break; |
31194731 | 323 | case MIGRATION_STATUS_CANCELLED: |
791e7c82 | 324 | info->has_status = true; |
17549e84 | 325 | break; |
5bb7910a | 326 | } |
cde63fbe | 327 | info->status = s->state; |
791e7c82 LC |
328 | |
329 | return info; | |
5bb7910a AL |
330 | } |
331 | ||
00458433 OW |
332 | void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, |
333 | Error **errp) | |
334 | { | |
335 | MigrationState *s = migrate_get_current(); | |
336 | MigrationCapabilityStatusList *cap; | |
337 | ||
31194731 HZ |
338 | if (s->state == MIGRATION_STATUS_ACTIVE || |
339 | s->state == MIGRATION_STATUS_SETUP) { | |
00458433 OW |
340 | error_set(errp, QERR_MIGRATION_ACTIVE); |
341 | return; | |
342 | } | |
343 | ||
344 | for (cap = params; cap; cap = cap->next) { | |
345 | s->enabled_capabilities[cap->value->capability] = cap->value->state; | |
346 | } | |
347 | } | |
348 | ||
85de8323 LL |
349 | void qmp_migrate_set_parameters(bool has_compress_level, |
350 | int64_t compress_level, | |
351 | bool has_compress_threads, | |
352 | int64_t compress_threads, | |
353 | bool has_decompress_threads, | |
354 | int64_t decompress_threads, Error **errp) | |
355 | { | |
356 | MigrationState *s = migrate_get_current(); | |
357 | ||
358 | if (has_compress_level && (compress_level < 0 || compress_level > 9)) { | |
359 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level", | |
360 | "is invalid, it should be in the range of 0 to 9"); | |
361 | return; | |
362 | } | |
363 | if (has_compress_threads && | |
364 | (compress_threads < 1 || compress_threads > 255)) { | |
365 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, | |
366 | "compress_threads", | |
367 | "is invalid, it should be in the range of 1 to 255"); | |
368 | return; | |
369 | } | |
370 | if (has_decompress_threads && | |
371 | (decompress_threads < 1 || decompress_threads > 255)) { | |
372 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, | |
373 | "decompress_threads", | |
374 | "is invalid, it should be in the range of 1 to 255"); | |
375 | return; | |
376 | } | |
377 | ||
378 | if (has_compress_level) { | |
379 | s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = compress_level; | |
380 | } | |
381 | if (has_compress_threads) { | |
382 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = compress_threads; | |
383 | } | |
384 | if (has_decompress_threads) { | |
385 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = | |
386 | decompress_threads; | |
387 | } | |
388 | } | |
389 | ||
065e2813 AL |
390 | /* shared migration helpers */ |
391 | ||
51cf4c1a Z |
392 | static void migrate_set_state(MigrationState *s, int old_state, int new_state) |
393 | { | |
394 | if (atomic_cmpxchg(&s->state, old_state, new_state) == new_state) { | |
395 | trace_migrate_set_state(new_state); | |
396 | } | |
397 | } | |
398 | ||
bb1fadc4 | 399 | static void migrate_fd_cleanup(void *opaque) |
065e2813 | 400 | { |
bb1fadc4 PB |
401 | MigrationState *s = opaque; |
402 | ||
403 | qemu_bh_delete(s->cleanup_bh); | |
404 | s->cleanup_bh = NULL; | |
405 | ||
065e2813 | 406 | if (s->file) { |
9013dca5 | 407 | trace_migrate_fd_cleanup(); |
404a7c05 PB |
408 | qemu_mutex_unlock_iothread(); |
409 | qemu_thread_join(&s->thread); | |
410 | qemu_mutex_lock_iothread(); | |
411 | ||
8706d2d5 | 412 | migrate_compress_threads_join(); |
6f190a06 PB |
413 | qemu_fclose(s->file); |
414 | s->file = NULL; | |
065e2813 AL |
415 | } |
416 | ||
31194731 | 417 | assert(s->state != MIGRATION_STATUS_ACTIVE); |
7a2c1721 | 418 | |
31194731 | 419 | if (s->state != MIGRATION_STATUS_COMPLETED) { |
7a2c1721 | 420 | qemu_savevm_state_cancel(); |
31194731 HZ |
421 | if (s->state == MIGRATION_STATUS_CANCELLING) { |
422 | migrate_set_state(s, MIGRATION_STATUS_CANCELLING, | |
423 | MIGRATION_STATUS_CANCELLED); | |
51cf4c1a | 424 | } |
7a2c1721 | 425 | } |
a3fa1d78 PB |
426 | |
427 | notifier_list_notify(&migration_state_notifiers, s); | |
065e2813 AL |
428 | } |
429 | ||
8b6b99b3 | 430 | void migrate_fd_error(MigrationState *s) |
065e2813 | 431 | { |
9013dca5 | 432 | trace_migrate_fd_error(); |
bb1fadc4 | 433 | assert(s->file == NULL); |
31194731 HZ |
434 | s->state = MIGRATION_STATUS_FAILED; |
435 | trace_migrate_set_state(MIGRATION_STATUS_FAILED); | |
bb1fadc4 | 436 | notifier_list_notify(&migration_state_notifiers, s); |
458cf28e JQ |
437 | } |
438 | ||
0edda1c4 | 439 | static void migrate_fd_cancel(MigrationState *s) |
065e2813 | 440 | { |
6f2b811a | 441 | int old_state ; |
a26ba26e | 442 | QEMUFile *f = migrate_get_current()->file; |
9013dca5 | 443 | trace_migrate_fd_cancel(); |
065e2813 | 444 | |
6f2b811a Z |
445 | do { |
446 | old_state = s->state; | |
31194731 HZ |
447 | if (old_state != MIGRATION_STATUS_SETUP && |
448 | old_state != MIGRATION_STATUS_ACTIVE) { | |
6f2b811a Z |
449 | break; |
450 | } | |
31194731 HZ |
451 | migrate_set_state(s, old_state, MIGRATION_STATUS_CANCELLING); |
452 | } while (s->state != MIGRATION_STATUS_CANCELLING); | |
a26ba26e DDAG |
453 | |
454 | /* | |
455 | * If we're unlucky the migration code might be stuck somewhere in a | |
456 | * send/write while the network has failed and is waiting to timeout; | |
457 | * if we've got shutdown(2) available then we can force it to quit. | |
458 | * The outgoing qemu file gets closed in migrate_fd_cleanup that is | |
459 | * called in a bh, so there is no race against this cancel. | |
460 | */ | |
31194731 | 461 | if (s->state == MIGRATION_STATUS_CANCELLING && f) { |
a26ba26e DDAG |
462 | qemu_file_shutdown(f); |
463 | } | |
065e2813 AL |
464 | } |
465 | ||
99a0db9b GH |
466 | void add_migration_state_change_notifier(Notifier *notify) |
467 | { | |
468 | notifier_list_add(&migration_state_notifiers, notify); | |
469 | } | |
470 | ||
471 | void remove_migration_state_change_notifier(Notifier *notify) | |
472 | { | |
31552529 | 473 | notifier_remove(notify); |
99a0db9b GH |
474 | } |
475 | ||
02edd2e7 | 476 | bool migration_in_setup(MigrationState *s) |
afe2df69 | 477 | { |
31194731 | 478 | return s->state == MIGRATION_STATUS_SETUP; |
afe2df69 GH |
479 | } |
480 | ||
7073693b | 481 | bool migration_has_finished(MigrationState *s) |
99a0db9b | 482 | { |
31194731 | 483 | return s->state == MIGRATION_STATUS_COMPLETED; |
99a0db9b | 484 | } |
0edda1c4 | 485 | |
afe2df69 GH |
486 | bool migration_has_failed(MigrationState *s) |
487 | { | |
31194731 HZ |
488 | return (s->state == MIGRATION_STATUS_CANCELLED || |
489 | s->state == MIGRATION_STATUS_FAILED); | |
afe2df69 GH |
490 | } |
491 | ||
6607ae23 | 492 | static MigrationState *migrate_init(const MigrationParams *params) |
0edda1c4 | 493 | { |
17549e84 | 494 | MigrationState *s = migrate_get_current(); |
d0ae46c1 | 495 | int64_t bandwidth_limit = s->bandwidth_limit; |
bbf6da32 | 496 | bool enabled_capabilities[MIGRATION_CAPABILITY_MAX]; |
17ad9b35 | 497 | int64_t xbzrle_cache_size = s->xbzrle_cache_size; |
43c60a81 LL |
498 | int compress_level = s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; |
499 | int compress_thread_count = | |
500 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; | |
501 | int decompress_thread_count = | |
502 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; | |
bbf6da32 OW |
503 | |
504 | memcpy(enabled_capabilities, s->enabled_capabilities, | |
505 | sizeof(enabled_capabilities)); | |
0edda1c4 | 506 | |
17549e84 | 507 | memset(s, 0, sizeof(*s)); |
6607ae23 | 508 | s->params = *params; |
bbf6da32 OW |
509 | memcpy(s->enabled_capabilities, enabled_capabilities, |
510 | sizeof(enabled_capabilities)); | |
17ad9b35 | 511 | s->xbzrle_cache_size = xbzrle_cache_size; |
1299c631 | 512 | |
43c60a81 LL |
513 | s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = compress_level; |
514 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = | |
515 | compress_thread_count; | |
516 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = | |
517 | decompress_thread_count; | |
0edda1c4 | 518 | s->bandwidth_limit = bandwidth_limit; |
31194731 HZ |
519 | s->state = MIGRATION_STATUS_SETUP; |
520 | trace_migrate_set_state(MIGRATION_STATUS_SETUP); | |
0edda1c4 | 521 | |
bc72ad67 | 522 | s->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0edda1c4 JQ |
523 | return s; |
524 | } | |
cab30143 | 525 | |
fa2756b7 AL |
526 | static GSList *migration_blockers; |
527 | ||
528 | void migrate_add_blocker(Error *reason) | |
529 | { | |
530 | migration_blockers = g_slist_prepend(migration_blockers, reason); | |
531 | } | |
532 | ||
533 | void migrate_del_blocker(Error *reason) | |
534 | { | |
535 | migration_blockers = g_slist_remove(migration_blockers, reason); | |
536 | } | |
537 | ||
bf1ae1f4 DDAG |
538 | void qmp_migrate_incoming(const char *uri, Error **errp) |
539 | { | |
540 | Error *local_err = NULL; | |
4debb5f5 | 541 | static bool once = true; |
bf1ae1f4 DDAG |
542 | |
543 | if (!deferred_incoming) { | |
4debb5f5 | 544 | error_setg(errp, "For use with '-incoming defer'"); |
bf1ae1f4 DDAG |
545 | return; |
546 | } | |
4debb5f5 DDAG |
547 | if (!once) { |
548 | error_setg(errp, "The incoming migration has already been started"); | |
549 | } | |
bf1ae1f4 DDAG |
550 | |
551 | qemu_start_incoming_migration(uri, &local_err); | |
552 | ||
553 | if (local_err) { | |
554 | error_propagate(errp, local_err); | |
555 | return; | |
556 | } | |
557 | ||
4debb5f5 | 558 | once = false; |
bf1ae1f4 DDAG |
559 | } |
560 | ||
e1c37d0e LC |
561 | void qmp_migrate(const char *uri, bool has_blk, bool blk, |
562 | bool has_inc, bool inc, bool has_detach, bool detach, | |
563 | Error **errp) | |
cab30143 | 564 | { |
be7059cd | 565 | Error *local_err = NULL; |
17549e84 | 566 | MigrationState *s = migrate_get_current(); |
6607ae23 | 567 | MigrationParams params; |
cab30143 | 568 | const char *p; |
cab30143 | 569 | |
8c0426ae PP |
570 | params.blk = has_blk && blk; |
571 | params.shared = has_inc && inc; | |
6607ae23 | 572 | |
31194731 HZ |
573 | if (s->state == MIGRATION_STATUS_ACTIVE || |
574 | s->state == MIGRATION_STATUS_SETUP || | |
575 | s->state == MIGRATION_STATUS_CANCELLING) { | |
e1c37d0e LC |
576 | error_set(errp, QERR_MIGRATION_ACTIVE); |
577 | return; | |
cab30143 JQ |
578 | } |
579 | ||
ca99993a DDAG |
580 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
581 | error_setg(errp, "Guest is waiting for an incoming migration"); | |
582 | return; | |
583 | } | |
584 | ||
e1c37d0e LC |
585 | if (qemu_savevm_state_blocked(errp)) { |
586 | return; | |
cab30143 JQ |
587 | } |
588 | ||
fa2756b7 | 589 | if (migration_blockers) { |
e1c37d0e LC |
590 | *errp = error_copy(migration_blockers->data); |
591 | return; | |
fa2756b7 AL |
592 | } |
593 | ||
6607ae23 | 594 | s = migrate_init(¶ms); |
cab30143 JQ |
595 | |
596 | if (strstart(uri, "tcp:", &p)) { | |
f37afb5a | 597 | tcp_start_outgoing_migration(s, p, &local_err); |
2da776db | 598 | #ifdef CONFIG_RDMA |
41310c68 | 599 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
600 | rdma_start_outgoing_migration(s, p, &local_err); |
601 | #endif | |
cab30143 JQ |
602 | #if !defined(WIN32) |
603 | } else if (strstart(uri, "exec:", &p)) { | |
f37afb5a | 604 | exec_start_outgoing_migration(s, p, &local_err); |
cab30143 | 605 | } else if (strstart(uri, "unix:", &p)) { |
f37afb5a | 606 | unix_start_outgoing_migration(s, p, &local_err); |
cab30143 | 607 | } else if (strstart(uri, "fd:", &p)) { |
f37afb5a | 608 | fd_start_outgoing_migration(s, p, &local_err); |
cab30143 | 609 | #endif |
99a0db9b | 610 | } else { |
e1c37d0e | 611 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "uri", "a valid migration protocol"); |
31194731 | 612 | s->state = MIGRATION_STATUS_FAILED; |
e1c37d0e | 613 | return; |
cab30143 JQ |
614 | } |
615 | ||
f37afb5a | 616 | if (local_err) { |
342ab8d1 | 617 | migrate_fd_error(s); |
f37afb5a | 618 | error_propagate(errp, local_err); |
e1c37d0e | 619 | return; |
1299c631 | 620 | } |
cab30143 JQ |
621 | } |
622 | ||
6cdedb07 | 623 | void qmp_migrate_cancel(Error **errp) |
cab30143 | 624 | { |
17549e84 | 625 | migrate_fd_cancel(migrate_get_current()); |
cab30143 JQ |
626 | } |
627 | ||
9e1ba4cc OW |
628 | void qmp_migrate_set_cache_size(int64_t value, Error **errp) |
629 | { | |
630 | MigrationState *s = migrate_get_current(); | |
c91e681a | 631 | int64_t new_size; |
9e1ba4cc OW |
632 | |
633 | /* Check for truncation */ | |
634 | if (value != (size_t)value) { | |
635 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", | |
636 | "exceeding address space"); | |
637 | return; | |
638 | } | |
639 | ||
a5615b14 OW |
640 | /* Cache should not be larger than guest ram size */ |
641 | if (value > ram_bytes_total()) { | |
642 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", | |
643 | "exceeds guest ram size "); | |
644 | return; | |
645 | } | |
646 | ||
c91e681a OW |
647 | new_size = xbzrle_cache_resize(value); |
648 | if (new_size < 0) { | |
649 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", | |
650 | "is smaller than page size"); | |
651 | return; | |
652 | } | |
653 | ||
654 | s->xbzrle_cache_size = new_size; | |
9e1ba4cc OW |
655 | } |
656 | ||
657 | int64_t qmp_query_migrate_cache_size(Error **errp) | |
658 | { | |
659 | return migrate_xbzrle_cache_size(); | |
660 | } | |
661 | ||
3dc85383 | 662 | void qmp_migrate_set_speed(int64_t value, Error **errp) |
cab30143 | 663 | { |
cab30143 JQ |
664 | MigrationState *s; |
665 | ||
3dc85383 LC |
666 | if (value < 0) { |
667 | value = 0; | |
99a0db9b | 668 | } |
442773ce PB |
669 | if (value > SIZE_MAX) { |
670 | value = SIZE_MAX; | |
671 | } | |
cab30143 | 672 | |
17549e84 | 673 | s = migrate_get_current(); |
3dc85383 | 674 | s->bandwidth_limit = value; |
442773ce PB |
675 | if (s->file) { |
676 | qemu_file_set_rate_limit(s->file, s->bandwidth_limit / XFER_LIMIT_RATIO); | |
677 | } | |
cab30143 JQ |
678 | } |
679 | ||
4f0a993b | 680 | void qmp_migrate_set_downtime(double value, Error **errp) |
cab30143 | 681 | { |
4f0a993b LC |
682 | value *= 1e9; |
683 | value = MAX(0, MIN(UINT64_MAX, value)); | |
684 | max_downtime = (uint64_t)value; | |
99a0db9b | 685 | } |
17ad9b35 | 686 | |
bde1e2ec CV |
687 | bool migrate_auto_converge(void) |
688 | { | |
689 | MigrationState *s; | |
690 | ||
691 | s = migrate_get_current(); | |
692 | ||
693 | return s->enabled_capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; | |
694 | } | |
695 | ||
323004a3 PL |
696 | bool migrate_zero_blocks(void) |
697 | { | |
698 | MigrationState *s; | |
699 | ||
700 | s = migrate_get_current(); | |
701 | ||
702 | return s->enabled_capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS]; | |
703 | } | |
704 | ||
8706d2d5 LL |
705 | bool migrate_use_compression(void) |
706 | { | |
dde4e694 LL |
707 | MigrationState *s; |
708 | ||
709 | s = migrate_get_current(); | |
710 | ||
711 | return s->enabled_capabilities[MIGRATION_CAPABILITY_COMPRESS]; | |
8706d2d5 LL |
712 | } |
713 | ||
714 | int migrate_compress_level(void) | |
715 | { | |
716 | MigrationState *s; | |
717 | ||
718 | s = migrate_get_current(); | |
719 | ||
43c60a81 | 720 | return s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; |
8706d2d5 LL |
721 | } |
722 | ||
723 | int migrate_compress_threads(void) | |
724 | { | |
725 | MigrationState *s; | |
726 | ||
727 | s = migrate_get_current(); | |
728 | ||
43c60a81 | 729 | return s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; |
8706d2d5 LL |
730 | } |
731 | ||
3fcb38c2 LL |
732 | int migrate_decompress_threads(void) |
733 | { | |
734 | MigrationState *s; | |
735 | ||
736 | s = migrate_get_current(); | |
737 | ||
43c60a81 | 738 | return s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; |
3fcb38c2 LL |
739 | } |
740 | ||
17ad9b35 OW |
741 | int migrate_use_xbzrle(void) |
742 | { | |
743 | MigrationState *s; | |
744 | ||
745 | s = migrate_get_current(); | |
746 | ||
747 | return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE]; | |
748 | } | |
749 | ||
750 | int64_t migrate_xbzrle_cache_size(void) | |
751 | { | |
752 | MigrationState *s; | |
753 | ||
754 | s = migrate_get_current(); | |
755 | ||
756 | return s->xbzrle_cache_size; | |
757 | } | |
0d82d0e8 JQ |
758 | |
759 | /* migration thread support */ | |
760 | ||
5f496a1b | 761 | static void *migration_thread(void *opaque) |
0d82d0e8 | 762 | { |
9848a404 | 763 | MigrationState *s = opaque; |
bc72ad67 AB |
764 | int64_t initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
765 | int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST); | |
be7172e2 | 766 | int64_t initial_bytes = 0; |
0d82d0e8 | 767 | int64_t max_size = 0; |
a3fa1d78 PB |
768 | int64_t start_time = initial_time; |
769 | bool old_vm_running = false; | |
76f5933a | 770 | |
f796baa1 | 771 | qemu_savevm_state_header(s->file); |
dba433c0 | 772 | qemu_savevm_state_begin(s->file, &s->params); |
0d82d0e8 | 773 | |
bc72ad67 | 774 | s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start; |
31194731 | 775 | migrate_set_state(s, MIGRATION_STATUS_SETUP, MIGRATION_STATUS_ACTIVE); |
29ae8a41 | 776 | |
31194731 | 777 | while (s->state == MIGRATION_STATUS_ACTIVE) { |
a3e879cd | 778 | int64_t current_time; |
c369f40d | 779 | uint64_t pending_size; |
0d82d0e8 | 780 | |
a0ff044b | 781 | if (!qemu_file_rate_limit(s->file)) { |
c369f40d | 782 | pending_size = qemu_savevm_state_pending(s->file, max_size); |
9013dca5 | 783 | trace_migrate_pending(pending_size, max_size); |
b22ff1fb | 784 | if (pending_size && pending_size >= max_size) { |
dba433c0 | 785 | qemu_savevm_state_iterate(s->file); |
c369f40d | 786 | } else { |
0e1146a7 KW |
787 | int ret; |
788 | ||
32c835ba | 789 | qemu_mutex_lock_iothread(); |
bc72ad67 | 790 | start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
c369f40d | 791 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER); |
a3fa1d78 | 792 | old_vm_running = runstate_is_running(); |
0e1146a7 KW |
793 | |
794 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); | |
795 | if (ret >= 0) { | |
40596834 | 796 | qemu_file_set_rate_limit(s->file, INT64_MAX); |
0e1146a7 KW |
797 | qemu_savevm_state_complete(s->file); |
798 | } | |
32c835ba | 799 | qemu_mutex_unlock_iothread(); |
0e1146a7 KW |
800 | |
801 | if (ret < 0) { | |
31194731 HZ |
802 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
803 | MIGRATION_STATUS_FAILED); | |
0e1146a7 KW |
804 | break; |
805 | } | |
806 | ||
059f896c | 807 | if (!qemu_file_get_error(s->file)) { |
31194731 HZ |
808 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
809 | MIGRATION_STATUS_COMPLETED); | |
059f896c PB |
810 | break; |
811 | } | |
c369f40d JQ |
812 | } |
813 | } | |
f4410a5d | 814 | |
fd45ee2c | 815 | if (qemu_file_get_error(s->file)) { |
31194731 HZ |
816 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
817 | MIGRATION_STATUS_FAILED); | |
fd45ee2c PB |
818 | break; |
819 | } | |
bc72ad67 | 820 | current_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0d82d0e8 | 821 | if (current_time >= initial_time + BUFFER_DELAY) { |
be7172e2 | 822 | uint64_t transferred_bytes = qemu_ftell(s->file) - initial_bytes; |
77417f10 | 823 | uint64_t time_spent = current_time - initial_time; |
0d82d0e8 JQ |
824 | double bandwidth = transferred_bytes / time_spent; |
825 | max_size = bandwidth * migrate_max_downtime() / 1000000; | |
826 | ||
7e114f8c MH |
827 | s->mbps = time_spent ? (((double) transferred_bytes * 8.0) / |
828 | ((double) time_spent / 1000.0)) / 1000.0 / 1000.0 : -1; | |
829 | ||
9013dca5 AK |
830 | trace_migrate_transferred(transferred_bytes, time_spent, |
831 | bandwidth, max_size); | |
90f8ae72 JQ |
832 | /* if we haven't sent anything, we don't want to recalculate |
833 | 10000 is a small enough number for our purposes */ | |
834 | if (s->dirty_bytes_rate && transferred_bytes > 10000) { | |
835 | s->expected_downtime = s->dirty_bytes_rate / bandwidth; | |
836 | } | |
0d82d0e8 | 837 | |
1964a397 | 838 | qemu_file_reset_rate_limit(s->file); |
0d82d0e8 | 839 | initial_time = current_time; |
be7172e2 | 840 | initial_bytes = qemu_ftell(s->file); |
0d82d0e8 | 841 | } |
a0ff044b | 842 | if (qemu_file_rate_limit(s->file)) { |
0d82d0e8 JQ |
843 | /* usleep expects microseconds */ |
844 | g_usleep((initial_time + BUFFER_DELAY - current_time)*1000); | |
845 | } | |
a3fa1d78 PB |
846 | } |
847 | ||
f4410a5d | 848 | qemu_mutex_lock_iothread(); |
31194731 | 849 | if (s->state == MIGRATION_STATUS_COMPLETED) { |
bc72ad67 | 850 | int64_t end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
d6ed7312 | 851 | uint64_t transferred_bytes = qemu_ftell(s->file); |
a3fa1d78 PB |
852 | s->total_time = end_time - s->total_time; |
853 | s->downtime = end_time - start_time; | |
d6ed7312 PL |
854 | if (s->total_time) { |
855 | s->mbps = (((double) transferred_bytes * 8.0) / | |
856 | ((double) s->total_time)) / 1000; | |
857 | } | |
a3fa1d78 PB |
858 | runstate_set(RUN_STATE_POSTMIGRATE); |
859 | } else { | |
860 | if (old_vm_running) { | |
a3fa1d78 | 861 | vm_start(); |
dba433c0 | 862 | } |
0d82d0e8 | 863 | } |
bb1fadc4 | 864 | qemu_bh_schedule(s->cleanup_bh); |
dba433c0 | 865 | qemu_mutex_unlock_iothread(); |
f4410a5d | 866 | |
0d82d0e8 JQ |
867 | return NULL; |
868 | } | |
869 | ||
9848a404 | 870 | void migrate_fd_connect(MigrationState *s) |
0d82d0e8 | 871 | { |
cc283e3b JQ |
872 | /* This is a best 1st approximation. ns to ms */ |
873 | s->expected_downtime = max_downtime/1000000; | |
bb1fadc4 | 874 | s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s); |
0d82d0e8 | 875 | |
442773ce PB |
876 | qemu_file_set_rate_limit(s->file, |
877 | s->bandwidth_limit / XFER_LIMIT_RATIO); | |
878 | ||
9287ac27 SH |
879 | /* Notify before starting migration thread */ |
880 | notifier_list_notify(&migration_state_notifiers, s); | |
881 | ||
8706d2d5 | 882 | migrate_compress_threads_create(); |
4900116e | 883 | qemu_thread_create(&s->thread, "migration", migration_thread, s, |
bb1fadc4 | 884 | QEMU_THREAD_JOINABLE); |
0d82d0e8 | 885 | } |