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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" |
0d82d0e8 | 20 | #include "migration/qemu-file.h" |
9c17d615 | 21 | #include "sysemu/sysemu.h" |
737e150e | 22 | #include "block/block.h" |
cc7a8ea7 | 23 | #include "qapi/qmp/qerror.h" |
1de7afc9 | 24 | #include "qemu/sockets.h" |
ab28bd23 | 25 | #include "qemu/rcu.h" |
caf71f86 | 26 | #include "migration/block.h" |
766bd176 | 27 | #include "qemu/thread.h" |
791e7c82 | 28 | #include "qmp-commands.h" |
c09e5bb1 | 29 | #include "trace.h" |
df4b1024 | 30 | #include "qapi/util.h" |
598cd2bd | 31 | #include "qapi-event.h" |
070afca2 | 32 | #include "qom/cpu.h" |
065e2813 | 33 | |
dc325627 | 34 | #define MAX_THROTTLE (32 << 20) /* Migration transfer speed throttling */ |
5bb7910a | 35 | |
5b4e1eb7 JQ |
36 | /* Amount of time to allocate to each "chunk" of bandwidth-throttled |
37 | * data. */ | |
38 | #define BUFFER_DELAY 100 | |
39 | #define XFER_LIMIT_RATIO (1000 / BUFFER_DELAY) | |
40 | ||
8706d2d5 LL |
41 | /* Default compression thread count */ |
42 | #define DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT 8 | |
3fcb38c2 LL |
43 | /* Default decompression thread count, usually decompression is at |
44 | * least 4 times as fast as compression.*/ | |
45 | #define DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT 2 | |
8706d2d5 LL |
46 | /*0: means nocompress, 1: best speed, ... 9: best compress ratio */ |
47 | #define DEFAULT_MIGRATE_COMPRESS_LEVEL 1 | |
1626fee3 JH |
48 | /* Define default autoconverge cpu throttle migration parameters */ |
49 | #define DEFAULT_MIGRATE_X_CPU_THROTTLE_INITIAL 20 | |
50 | #define DEFAULT_MIGRATE_X_CPU_THROTTLE_INCREMENT 10 | |
8706d2d5 | 51 | |
17ad9b35 OW |
52 | /* Migration XBZRLE default cache size */ |
53 | #define DEFAULT_MIGRATE_CACHE_SIZE (64 * 1024 * 1024) | |
54 | ||
99a0db9b GH |
55 | static NotifierList migration_state_notifiers = |
56 | NOTIFIER_LIST_INITIALIZER(migration_state_notifiers); | |
57 | ||
adde220a DDAG |
58 | static bool deferred_incoming; |
59 | ||
17549e84 JQ |
60 | /* When we add fault tolerance, we could have several |
61 | migrations at once. For now we don't need to add | |
62 | dynamic creation of migration */ | |
63 | ||
bca7856a | 64 | /* For outgoing */ |
859bc756 | 65 | MigrationState *migrate_get_current(void) |
17549e84 JQ |
66 | { |
67 | static MigrationState current_migration = { | |
31194731 | 68 | .state = MIGRATION_STATUS_NONE, |
d0ae46c1 | 69 | .bandwidth_limit = MAX_THROTTLE, |
17ad9b35 | 70 | .xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE, |
7e114f8c | 71 | .mbps = -1, |
43c60a81 LL |
72 | .parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = |
73 | DEFAULT_MIGRATE_COMPRESS_LEVEL, | |
74 | .parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = | |
75 | DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT, | |
76 | .parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = | |
77 | DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT, | |
1626fee3 JH |
78 | .parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL] = |
79 | DEFAULT_MIGRATE_X_CPU_THROTTLE_INITIAL, | |
80 | .parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT] = | |
81 | DEFAULT_MIGRATE_X_CPU_THROTTLE_INCREMENT, | |
17549e84 JQ |
82 | }; |
83 | ||
84 | return ¤t_migration; | |
85 | } | |
86 | ||
bca7856a DDAG |
87 | /* For incoming */ |
88 | static MigrationIncomingState *mis_current; | |
89 | ||
90 | MigrationIncomingState *migration_incoming_get_current(void) | |
91 | { | |
92 | return mis_current; | |
93 | } | |
94 | ||
95 | MigrationIncomingState *migration_incoming_state_new(QEMUFile* f) | |
96 | { | |
97f3ad35 | 97 | mis_current = g_new0(MigrationIncomingState, 1); |
bca7856a | 98 | mis_current->file = f; |
1a8f46f8 | 99 | QLIST_INIT(&mis_current->loadvm_handlers); |
bca7856a DDAG |
100 | |
101 | return mis_current; | |
102 | } | |
103 | ||
104 | void migration_incoming_state_destroy(void) | |
105 | { | |
1a8f46f8 | 106 | loadvm_free_handlers(mis_current); |
bca7856a DDAG |
107 | g_free(mis_current); |
108 | mis_current = NULL; | |
109 | } | |
110 | ||
df4b1024 JQ |
111 | |
112 | typedef struct { | |
13d16814 | 113 | bool optional; |
df4b1024 JQ |
114 | uint32_t size; |
115 | uint8_t runstate[100]; | |
172c4356 JQ |
116 | RunState state; |
117 | bool received; | |
df4b1024 JQ |
118 | } GlobalState; |
119 | ||
120 | static GlobalState global_state; | |
121 | ||
560d027b | 122 | int global_state_store(void) |
df4b1024 JQ |
123 | { |
124 | if (!runstate_store((char *)global_state.runstate, | |
125 | sizeof(global_state.runstate))) { | |
126 | error_report("runstate name too big: %s", global_state.runstate); | |
127 | trace_migrate_state_too_big(); | |
128 | return -EINVAL; | |
129 | } | |
130 | return 0; | |
131 | } | |
132 | ||
c69adea4 AP |
133 | void global_state_store_running(void) |
134 | { | |
135 | const char *state = RunState_lookup[RUN_STATE_RUNNING]; | |
136 | strncpy((char *)global_state.runstate, | |
137 | state, sizeof(global_state.runstate)); | |
138 | } | |
139 | ||
172c4356 | 140 | static bool global_state_received(void) |
df4b1024 | 141 | { |
172c4356 JQ |
142 | return global_state.received; |
143 | } | |
144 | ||
145 | static RunState global_state_get_runstate(void) | |
146 | { | |
147 | return global_state.state; | |
df4b1024 JQ |
148 | } |
149 | ||
13d16814 JQ |
150 | void global_state_set_optional(void) |
151 | { | |
152 | global_state.optional = true; | |
153 | } | |
154 | ||
155 | static bool global_state_needed(void *opaque) | |
156 | { | |
157 | GlobalState *s = opaque; | |
158 | char *runstate = (char *)s->runstate; | |
159 | ||
160 | /* If it is not optional, it is mandatory */ | |
161 | ||
162 | if (s->optional == false) { | |
163 | return true; | |
164 | } | |
165 | ||
166 | /* If state is running or paused, it is not needed */ | |
167 | ||
168 | if (strcmp(runstate, "running") == 0 || | |
169 | strcmp(runstate, "paused") == 0) { | |
170 | return false; | |
171 | } | |
172 | ||
173 | /* for any other state it is needed */ | |
174 | return true; | |
175 | } | |
176 | ||
df4b1024 JQ |
177 | static int global_state_post_load(void *opaque, int version_id) |
178 | { | |
179 | GlobalState *s = opaque; | |
172c4356 JQ |
180 | Error *local_err = NULL; |
181 | int r; | |
df4b1024 JQ |
182 | char *runstate = (char *)s->runstate; |
183 | ||
172c4356 | 184 | s->received = true; |
df4b1024 JQ |
185 | trace_migrate_global_state_post_load(runstate); |
186 | ||
172c4356 | 187 | r = qapi_enum_parse(RunState_lookup, runstate, RUN_STATE_MAX, |
df4b1024 JQ |
188 | -1, &local_err); |
189 | ||
172c4356 JQ |
190 | if (r == -1) { |
191 | if (local_err) { | |
192 | error_report_err(local_err); | |
df4b1024 | 193 | } |
172c4356 | 194 | return -EINVAL; |
df4b1024 | 195 | } |
172c4356 | 196 | s->state = r; |
df4b1024 | 197 | |
172c4356 | 198 | return 0; |
df4b1024 JQ |
199 | } |
200 | ||
201 | static void global_state_pre_save(void *opaque) | |
202 | { | |
203 | GlobalState *s = opaque; | |
204 | ||
205 | trace_migrate_global_state_pre_save((char *)s->runstate); | |
206 | s->size = strlen((char *)s->runstate) + 1; | |
207 | } | |
208 | ||
209 | static const VMStateDescription vmstate_globalstate = { | |
210 | .name = "globalstate", | |
211 | .version_id = 1, | |
212 | .minimum_version_id = 1, | |
213 | .post_load = global_state_post_load, | |
214 | .pre_save = global_state_pre_save, | |
13d16814 | 215 | .needed = global_state_needed, |
df4b1024 JQ |
216 | .fields = (VMStateField[]) { |
217 | VMSTATE_UINT32(size, GlobalState), | |
218 | VMSTATE_BUFFER(runstate, GlobalState), | |
219 | VMSTATE_END_OF_LIST() | |
220 | }, | |
221 | }; | |
222 | ||
223 | void register_global_state(void) | |
224 | { | |
225 | /* We would use it independently that we receive it */ | |
226 | strcpy((char *)&global_state.runstate, ""); | |
172c4356 | 227 | global_state.received = false; |
df4b1024 JQ |
228 | vmstate_register(NULL, 0, &vmstate_globalstate, &global_state); |
229 | } | |
230 | ||
b05dc723 JQ |
231 | static void migrate_generate_event(int new_state) |
232 | { | |
233 | if (migrate_use_events()) { | |
234 | qapi_event_send_migration(new_state, &error_abort); | |
b05dc723 JQ |
235 | } |
236 | } | |
237 | ||
adde220a DDAG |
238 | /* |
239 | * Called on -incoming with a defer: uri. | |
240 | * The migration can be started later after any parameters have been | |
241 | * changed. | |
242 | */ | |
243 | static void deferred_incoming_migration(Error **errp) | |
244 | { | |
245 | if (deferred_incoming) { | |
246 | error_setg(errp, "Incoming migration already deferred"); | |
247 | } | |
248 | deferred_incoming = true; | |
249 | } | |
250 | ||
43eaae28 | 251 | void qemu_start_incoming_migration(const char *uri, Error **errp) |
5bb7910a | 252 | { |
34c9dd8e AL |
253 | const char *p; |
254 | ||
7cf1fe6d | 255 | qapi_event_send_migration(MIGRATION_STATUS_SETUP, &error_abort); |
adde220a DDAG |
256 | if (!strcmp(uri, "defer")) { |
257 | deferred_incoming_migration(errp); | |
258 | } else if (strstart(uri, "tcp:", &p)) { | |
43eaae28 | 259 | tcp_start_incoming_migration(p, errp); |
2da776db | 260 | #ifdef CONFIG_RDMA |
adde220a | 261 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
262 | rdma_start_incoming_migration(p, errp); |
263 | #endif | |
065e2813 | 264 | #if !defined(WIN32) |
adde220a | 265 | } else if (strstart(uri, "exec:", &p)) { |
43eaae28 | 266 | exec_start_incoming_migration(p, errp); |
adde220a | 267 | } else if (strstart(uri, "unix:", &p)) { |
43eaae28 | 268 | unix_start_incoming_migration(p, errp); |
adde220a | 269 | } else if (strstart(uri, "fd:", &p)) { |
43eaae28 | 270 | fd_start_incoming_migration(p, errp); |
065e2813 | 271 | #endif |
adde220a | 272 | } else { |
312fd5f2 | 273 | error_setg(errp, "unknown migration protocol: %s", uri); |
8ca5e801 | 274 | } |
5bb7910a AL |
275 | } |
276 | ||
82a4da79 | 277 | static void process_incoming_migration_co(void *opaque) |
511c0231 | 278 | { |
82a4da79 | 279 | QEMUFile *f = opaque; |
5a8a30db | 280 | Error *local_err = NULL; |
1c12e1f5 PB |
281 | int ret; |
282 | ||
bca7856a | 283 | migration_incoming_state_new(f); |
7cf1fe6d | 284 | migrate_generate_event(MIGRATION_STATUS_ACTIVE); |
1c12e1f5 | 285 | ret = qemu_loadvm_state(f); |
bca7856a | 286 | |
1c12e1f5 | 287 | qemu_fclose(f); |
905f26f2 | 288 | free_xbzrle_decoded_buf(); |
bca7856a DDAG |
289 | migration_incoming_state_destroy(); |
290 | ||
1c12e1f5 | 291 | if (ret < 0) { |
7cf1fe6d | 292 | migrate_generate_event(MIGRATION_STATUS_FAILED); |
db80face | 293 | error_report("load of migration failed: %s", strerror(-ret)); |
3fcb38c2 | 294 | migrate_decompress_threads_join(); |
4aead692 | 295 | exit(EXIT_FAILURE); |
511c0231 JQ |
296 | } |
297 | qemu_announce_self(); | |
511c0231 | 298 | |
0f15423c | 299 | /* Make sure all file formats flush their mutable metadata */ |
5a8a30db KW |
300 | bdrv_invalidate_cache_all(&local_err); |
301 | if (local_err) { | |
ed1f3e00 | 302 | migrate_generate_event(MIGRATION_STATUS_FAILED); |
97baf9d9 | 303 | error_report_err(local_err); |
3fcb38c2 | 304 | migrate_decompress_threads_join(); |
5a8a30db KW |
305 | exit(EXIT_FAILURE); |
306 | } | |
0f15423c | 307 | |
172c4356 JQ |
308 | /* If global state section was not received or we are in running |
309 | state, we need to obey autostart. Any other state is set with | |
310 | runstate_set. */ | |
df4b1024 | 311 | |
172c4356 JQ |
312 | if (!global_state_received() || |
313 | global_state_get_runstate() == RUN_STATE_RUNNING) { | |
df4b1024 JQ |
314 | if (autostart) { |
315 | vm_start(); | |
316 | } else { | |
317 | runstate_set(RUN_STATE_PAUSED); | |
318 | } | |
172c4356 JQ |
319 | } else { |
320 | runstate_set(global_state_get_runstate()); | |
f5bbfba1 | 321 | } |
3fcb38c2 | 322 | migrate_decompress_threads_join(); |
ed1f3e00 DDAG |
323 | /* |
324 | * This must happen after any state changes since as soon as an external | |
325 | * observer sees this event they might start to prod at the VM assuming | |
326 | * it's ready to use. | |
327 | */ | |
328 | migrate_generate_event(MIGRATION_STATUS_COMPLETED); | |
511c0231 JQ |
329 | } |
330 | ||
82a4da79 PB |
331 | void process_incoming_migration(QEMUFile *f) |
332 | { | |
333 | Coroutine *co = qemu_coroutine_create(process_incoming_migration_co); | |
334 | int fd = qemu_get_fd(f); | |
335 | ||
336 | assert(fd != -1); | |
3fcb38c2 | 337 | migrate_decompress_threads_create(); |
f9e8cacc | 338 | qemu_set_nonblock(fd); |
82a4da79 PB |
339 | qemu_coroutine_enter(co, f); |
340 | } | |
341 | ||
a0a3fd60 GC |
342 | /* amount of nanoseconds we are willing to wait for migration to be down. |
343 | * the choice of nanoseconds is because it is the maximum resolution that | |
344 | * get_clock() can achieve. It is an internal measure. All user-visible | |
345 | * units must be in seconds */ | |
f7cd55a0 | 346 | static uint64_t max_downtime = 300000000; |
a0a3fd60 GC |
347 | |
348 | uint64_t migrate_max_downtime(void) | |
349 | { | |
350 | return max_downtime; | |
351 | } | |
352 | ||
bbf6da32 OW |
353 | MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) |
354 | { | |
355 | MigrationCapabilityStatusList *head = NULL; | |
356 | MigrationCapabilityStatusList *caps; | |
357 | MigrationState *s = migrate_get_current(); | |
358 | int i; | |
359 | ||
387eedeb | 360 | caps = NULL; /* silence compiler warning */ |
bbf6da32 OW |
361 | for (i = 0; i < MIGRATION_CAPABILITY_MAX; i++) { |
362 | if (head == NULL) { | |
363 | head = g_malloc0(sizeof(*caps)); | |
364 | caps = head; | |
365 | } else { | |
366 | caps->next = g_malloc0(sizeof(*caps)); | |
367 | caps = caps->next; | |
368 | } | |
369 | caps->value = | |
370 | g_malloc(sizeof(*caps->value)); | |
371 | caps->value->capability = i; | |
372 | caps->value->state = s->enabled_capabilities[i]; | |
373 | } | |
374 | ||
375 | return head; | |
376 | } | |
377 | ||
85de8323 LL |
378 | MigrationParameters *qmp_query_migrate_parameters(Error **errp) |
379 | { | |
380 | MigrationParameters *params; | |
381 | MigrationState *s = migrate_get_current(); | |
382 | ||
383 | params = g_malloc0(sizeof(*params)); | |
384 | params->compress_level = s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; | |
385 | params->compress_threads = | |
386 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; | |
387 | params->decompress_threads = | |
388 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; | |
1626fee3 JH |
389 | params->x_cpu_throttle_initial = |
390 | s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL]; | |
391 | params->x_cpu_throttle_increment = | |
392 | s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT]; | |
85de8323 LL |
393 | |
394 | return params; | |
395 | } | |
396 | ||
f36d55af OW |
397 | static void get_xbzrle_cache_stats(MigrationInfo *info) |
398 | { | |
399 | if (migrate_use_xbzrle()) { | |
400 | info->has_xbzrle_cache = true; | |
401 | info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache)); | |
402 | info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size(); | |
403 | info->xbzrle_cache->bytes = xbzrle_mig_bytes_transferred(); | |
404 | info->xbzrle_cache->pages = xbzrle_mig_pages_transferred(); | |
405 | info->xbzrle_cache->cache_miss = xbzrle_mig_pages_cache_miss(); | |
8bc39233 | 406 | info->xbzrle_cache->cache_miss_rate = xbzrle_mig_cache_miss_rate(); |
f36d55af OW |
407 | info->xbzrle_cache->overflow = xbzrle_mig_pages_overflow(); |
408 | } | |
409 | } | |
410 | ||
791e7c82 | 411 | MigrationInfo *qmp_query_migrate(Error **errp) |
5bb7910a | 412 | { |
791e7c82 | 413 | MigrationInfo *info = g_malloc0(sizeof(*info)); |
17549e84 JQ |
414 | MigrationState *s = migrate_get_current(); |
415 | ||
416 | switch (s->state) { | |
31194731 | 417 | case MIGRATION_STATUS_NONE: |
17549e84 JQ |
418 | /* no migration has happened ever */ |
419 | break; | |
31194731 | 420 | case MIGRATION_STATUS_SETUP: |
29ae8a41 | 421 | info->has_status = true; |
ed4fbd10 | 422 | info->has_total_time = false; |
29ae8a41 | 423 | break; |
31194731 HZ |
424 | case MIGRATION_STATUS_ACTIVE: |
425 | case MIGRATION_STATUS_CANCELLING: | |
791e7c82 | 426 | info->has_status = true; |
7aa939af | 427 | info->has_total_time = true; |
bc72ad67 | 428 | info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) |
7aa939af | 429 | - s->total_time; |
2c52ddf1 JQ |
430 | info->has_expected_downtime = true; |
431 | info->expected_downtime = s->expected_downtime; | |
ed4fbd10 MH |
432 | info->has_setup_time = true; |
433 | info->setup_time = s->setup_time; | |
17549e84 | 434 | |
791e7c82 LC |
435 | info->has_ram = true; |
436 | info->ram = g_malloc0(sizeof(*info->ram)); | |
437 | info->ram->transferred = ram_bytes_transferred(); | |
438 | info->ram->remaining = ram_bytes_remaining(); | |
439 | info->ram->total = ram_bytes_total(); | |
004d4c10 | 440 | info->ram->duplicate = dup_mig_pages_transferred(); |
f1c72795 | 441 | info->ram->skipped = skipped_mig_pages_transferred(); |
004d4c10 OW |
442 | info->ram->normal = norm_mig_pages_transferred(); |
443 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
8d017193 | 444 | info->ram->dirty_pages_rate = s->dirty_pages_rate; |
7e114f8c | 445 | info->ram->mbps = s->mbps; |
58570ed8 | 446 | info->ram->dirty_sync_count = s->dirty_sync_count; |
8d017193 | 447 | |
17549e84 | 448 | if (blk_mig_active()) { |
791e7c82 LC |
449 | info->has_disk = true; |
450 | info->disk = g_malloc0(sizeof(*info->disk)); | |
451 | info->disk->transferred = blk_mig_bytes_transferred(); | |
452 | info->disk->remaining = blk_mig_bytes_remaining(); | |
453 | info->disk->total = blk_mig_bytes_total(); | |
ff8d81d8 | 454 | } |
f36d55af | 455 | |
4782893e JH |
456 | if (cpu_throttle_active()) { |
457 | info->has_x_cpu_throttle_percentage = true; | |
458 | info->x_cpu_throttle_percentage = cpu_throttle_get_percentage(); | |
459 | } | |
460 | ||
f36d55af | 461 | get_xbzrle_cache_stats(info); |
17549e84 | 462 | break; |
31194731 | 463 | case MIGRATION_STATUS_COMPLETED: |
f36d55af OW |
464 | get_xbzrle_cache_stats(info); |
465 | ||
791e7c82 | 466 | info->has_status = true; |
00c14997 | 467 | info->has_total_time = true; |
7aa939af | 468 | info->total_time = s->total_time; |
9c5a9fcf JQ |
469 | info->has_downtime = true; |
470 | info->downtime = s->downtime; | |
ed4fbd10 MH |
471 | info->has_setup_time = true; |
472 | info->setup_time = s->setup_time; | |
d5f8a570 JQ |
473 | |
474 | info->has_ram = true; | |
475 | info->ram = g_malloc0(sizeof(*info->ram)); | |
476 | info->ram->transferred = ram_bytes_transferred(); | |
477 | info->ram->remaining = 0; | |
478 | info->ram->total = ram_bytes_total(); | |
004d4c10 | 479 | info->ram->duplicate = dup_mig_pages_transferred(); |
f1c72795 | 480 | info->ram->skipped = skipped_mig_pages_transferred(); |
004d4c10 OW |
481 | info->ram->normal = norm_mig_pages_transferred(); |
482 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
7e114f8c | 483 | info->ram->mbps = s->mbps; |
58570ed8 | 484 | info->ram->dirty_sync_count = s->dirty_sync_count; |
17549e84 | 485 | break; |
31194731 | 486 | case MIGRATION_STATUS_FAILED: |
791e7c82 | 487 | info->has_status = true; |
17549e84 | 488 | break; |
31194731 | 489 | case MIGRATION_STATUS_CANCELLED: |
791e7c82 | 490 | info->has_status = true; |
17549e84 | 491 | break; |
5bb7910a | 492 | } |
cde63fbe | 493 | info->status = s->state; |
791e7c82 LC |
494 | |
495 | return info; | |
5bb7910a AL |
496 | } |
497 | ||
00458433 OW |
498 | void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, |
499 | Error **errp) | |
500 | { | |
501 | MigrationState *s = migrate_get_current(); | |
502 | MigrationCapabilityStatusList *cap; | |
503 | ||
31194731 HZ |
504 | if (s->state == MIGRATION_STATUS_ACTIVE || |
505 | s->state == MIGRATION_STATUS_SETUP) { | |
c6bd8c70 | 506 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
00458433 OW |
507 | return; |
508 | } | |
509 | ||
510 | for (cap = params; cap; cap = cap->next) { | |
511 | s->enabled_capabilities[cap->value->capability] = cap->value->state; | |
512 | } | |
513 | } | |
514 | ||
85de8323 LL |
515 | void qmp_migrate_set_parameters(bool has_compress_level, |
516 | int64_t compress_level, | |
517 | bool has_compress_threads, | |
518 | int64_t compress_threads, | |
519 | bool has_decompress_threads, | |
1626fee3 JH |
520 | int64_t decompress_threads, |
521 | bool has_x_cpu_throttle_initial, | |
522 | int64_t x_cpu_throttle_initial, | |
523 | bool has_x_cpu_throttle_increment, | |
524 | int64_t x_cpu_throttle_increment, Error **errp) | |
85de8323 LL |
525 | { |
526 | MigrationState *s = migrate_get_current(); | |
527 | ||
528 | if (has_compress_level && (compress_level < 0 || compress_level > 9)) { | |
c6bd8c70 MA |
529 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level", |
530 | "is invalid, it should be in the range of 0 to 9"); | |
85de8323 LL |
531 | return; |
532 | } | |
533 | if (has_compress_threads && | |
534 | (compress_threads < 1 || compress_threads > 255)) { | |
c6bd8c70 MA |
535 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
536 | "compress_threads", | |
537 | "is invalid, it should be in the range of 1 to 255"); | |
85de8323 LL |
538 | return; |
539 | } | |
540 | if (has_decompress_threads && | |
541 | (decompress_threads < 1 || decompress_threads > 255)) { | |
c6bd8c70 MA |
542 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
543 | "decompress_threads", | |
544 | "is invalid, it should be in the range of 1 to 255"); | |
85de8323 LL |
545 | return; |
546 | } | |
1626fee3 JH |
547 | if (has_x_cpu_throttle_initial && |
548 | (x_cpu_throttle_initial < 1 || x_cpu_throttle_initial > 99)) { | |
549 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
550 | "x_cpu_throttle_initial", | |
551 | "an integer in the range of 1 to 99"); | |
552 | } | |
553 | if (has_x_cpu_throttle_increment && | |
554 | (x_cpu_throttle_increment < 1 || x_cpu_throttle_increment > 99)) { | |
555 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
556 | "x_cpu_throttle_increment", | |
557 | "an integer in the range of 1 to 99"); | |
558 | } | |
85de8323 LL |
559 | |
560 | if (has_compress_level) { | |
561 | s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = compress_level; | |
562 | } | |
563 | if (has_compress_threads) { | |
564 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = compress_threads; | |
565 | } | |
566 | if (has_decompress_threads) { | |
567 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = | |
568 | decompress_threads; | |
569 | } | |
1626fee3 JH |
570 | if (has_x_cpu_throttle_initial) { |
571 | s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL] = | |
572 | x_cpu_throttle_initial; | |
573 | } | |
574 | ||
575 | if (has_x_cpu_throttle_increment) { | |
576 | s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT] = | |
577 | x_cpu_throttle_increment; | |
578 | } | |
85de8323 LL |
579 | } |
580 | ||
065e2813 AL |
581 | /* shared migration helpers */ |
582 | ||
51cf4c1a Z |
583 | static void migrate_set_state(MigrationState *s, int old_state, int new_state) |
584 | { | |
a5c17b5f | 585 | if (atomic_cmpxchg(&s->state, old_state, new_state) == old_state) { |
4ba4bc5e | 586 | trace_migrate_set_state(new_state); |
b05dc723 | 587 | migrate_generate_event(new_state); |
51cf4c1a Z |
588 | } |
589 | } | |
590 | ||
bb1fadc4 | 591 | static void migrate_fd_cleanup(void *opaque) |
065e2813 | 592 | { |
bb1fadc4 PB |
593 | MigrationState *s = opaque; |
594 | ||
595 | qemu_bh_delete(s->cleanup_bh); | |
596 | s->cleanup_bh = NULL; | |
597 | ||
065e2813 | 598 | if (s->file) { |
9013dca5 | 599 | trace_migrate_fd_cleanup(); |
404a7c05 PB |
600 | qemu_mutex_unlock_iothread(); |
601 | qemu_thread_join(&s->thread); | |
602 | qemu_mutex_lock_iothread(); | |
603 | ||
8706d2d5 | 604 | migrate_compress_threads_join(); |
6f190a06 PB |
605 | qemu_fclose(s->file); |
606 | s->file = NULL; | |
065e2813 AL |
607 | } |
608 | ||
31194731 | 609 | assert(s->state != MIGRATION_STATUS_ACTIVE); |
7a2c1721 | 610 | |
31194731 | 611 | if (s->state != MIGRATION_STATUS_COMPLETED) { |
7a2c1721 | 612 | qemu_savevm_state_cancel(); |
31194731 HZ |
613 | if (s->state == MIGRATION_STATUS_CANCELLING) { |
614 | migrate_set_state(s, MIGRATION_STATUS_CANCELLING, | |
615 | MIGRATION_STATUS_CANCELLED); | |
51cf4c1a | 616 | } |
7a2c1721 | 617 | } |
a3fa1d78 PB |
618 | |
619 | notifier_list_notify(&migration_state_notifiers, s); | |
065e2813 AL |
620 | } |
621 | ||
8b6b99b3 | 622 | void migrate_fd_error(MigrationState *s) |
065e2813 | 623 | { |
9013dca5 | 624 | trace_migrate_fd_error(); |
bb1fadc4 | 625 | assert(s->file == NULL); |
7844337d | 626 | migrate_set_state(s, MIGRATION_STATUS_SETUP, MIGRATION_STATUS_FAILED); |
bb1fadc4 | 627 | notifier_list_notify(&migration_state_notifiers, s); |
458cf28e JQ |
628 | } |
629 | ||
0edda1c4 | 630 | static void migrate_fd_cancel(MigrationState *s) |
065e2813 | 631 | { |
6f2b811a | 632 | int old_state ; |
a26ba26e | 633 | QEMUFile *f = migrate_get_current()->file; |
9013dca5 | 634 | trace_migrate_fd_cancel(); |
065e2813 | 635 | |
6f2b811a Z |
636 | do { |
637 | old_state = s->state; | |
31194731 HZ |
638 | if (old_state != MIGRATION_STATUS_SETUP && |
639 | old_state != MIGRATION_STATUS_ACTIVE) { | |
6f2b811a Z |
640 | break; |
641 | } | |
31194731 HZ |
642 | migrate_set_state(s, old_state, MIGRATION_STATUS_CANCELLING); |
643 | } while (s->state != MIGRATION_STATUS_CANCELLING); | |
a26ba26e DDAG |
644 | |
645 | /* | |
646 | * If we're unlucky the migration code might be stuck somewhere in a | |
647 | * send/write while the network has failed and is waiting to timeout; | |
648 | * if we've got shutdown(2) available then we can force it to quit. | |
649 | * The outgoing qemu file gets closed in migrate_fd_cleanup that is | |
650 | * called in a bh, so there is no race against this cancel. | |
651 | */ | |
31194731 | 652 | if (s->state == MIGRATION_STATUS_CANCELLING && f) { |
a26ba26e DDAG |
653 | qemu_file_shutdown(f); |
654 | } | |
065e2813 AL |
655 | } |
656 | ||
99a0db9b GH |
657 | void add_migration_state_change_notifier(Notifier *notify) |
658 | { | |
659 | notifier_list_add(&migration_state_notifiers, notify); | |
660 | } | |
661 | ||
662 | void remove_migration_state_change_notifier(Notifier *notify) | |
663 | { | |
31552529 | 664 | notifier_remove(notify); |
99a0db9b GH |
665 | } |
666 | ||
02edd2e7 | 667 | bool migration_in_setup(MigrationState *s) |
afe2df69 | 668 | { |
31194731 | 669 | return s->state == MIGRATION_STATUS_SETUP; |
afe2df69 GH |
670 | } |
671 | ||
7073693b | 672 | bool migration_has_finished(MigrationState *s) |
99a0db9b | 673 | { |
31194731 | 674 | return s->state == MIGRATION_STATUS_COMPLETED; |
99a0db9b | 675 | } |
0edda1c4 | 676 | |
afe2df69 GH |
677 | bool migration_has_failed(MigrationState *s) |
678 | { | |
31194731 HZ |
679 | return (s->state == MIGRATION_STATUS_CANCELLED || |
680 | s->state == MIGRATION_STATUS_FAILED); | |
afe2df69 GH |
681 | } |
682 | ||
6607ae23 | 683 | static MigrationState *migrate_init(const MigrationParams *params) |
0edda1c4 | 684 | { |
17549e84 | 685 | MigrationState *s = migrate_get_current(); |
d0ae46c1 | 686 | int64_t bandwidth_limit = s->bandwidth_limit; |
bbf6da32 | 687 | bool enabled_capabilities[MIGRATION_CAPABILITY_MAX]; |
17ad9b35 | 688 | int64_t xbzrle_cache_size = s->xbzrle_cache_size; |
43c60a81 LL |
689 | int compress_level = s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; |
690 | int compress_thread_count = | |
691 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; | |
692 | int decompress_thread_count = | |
693 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; | |
1626fee3 JH |
694 | int x_cpu_throttle_initial = |
695 | s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL]; | |
696 | int x_cpu_throttle_increment = | |
697 | s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT]; | |
bbf6da32 OW |
698 | |
699 | memcpy(enabled_capabilities, s->enabled_capabilities, | |
700 | sizeof(enabled_capabilities)); | |
0edda1c4 | 701 | |
17549e84 | 702 | memset(s, 0, sizeof(*s)); |
6607ae23 | 703 | s->params = *params; |
bbf6da32 OW |
704 | memcpy(s->enabled_capabilities, enabled_capabilities, |
705 | sizeof(enabled_capabilities)); | |
17ad9b35 | 706 | s->xbzrle_cache_size = xbzrle_cache_size; |
1299c631 | 707 | |
43c60a81 LL |
708 | s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = compress_level; |
709 | s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = | |
710 | compress_thread_count; | |
711 | s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] = | |
712 | decompress_thread_count; | |
1626fee3 JH |
713 | s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL] = |
714 | x_cpu_throttle_initial; | |
715 | s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT] = | |
716 | x_cpu_throttle_increment; | |
0edda1c4 | 717 | s->bandwidth_limit = bandwidth_limit; |
7844337d | 718 | migrate_set_state(s, MIGRATION_STATUS_NONE, MIGRATION_STATUS_SETUP); |
0edda1c4 | 719 | |
bc72ad67 | 720 | s->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0edda1c4 JQ |
721 | return s; |
722 | } | |
cab30143 | 723 | |
fa2756b7 AL |
724 | static GSList *migration_blockers; |
725 | ||
726 | void migrate_add_blocker(Error *reason) | |
727 | { | |
728 | migration_blockers = g_slist_prepend(migration_blockers, reason); | |
729 | } | |
730 | ||
731 | void migrate_del_blocker(Error *reason) | |
732 | { | |
733 | migration_blockers = g_slist_remove(migration_blockers, reason); | |
734 | } | |
735 | ||
bf1ae1f4 DDAG |
736 | void qmp_migrate_incoming(const char *uri, Error **errp) |
737 | { | |
738 | Error *local_err = NULL; | |
4debb5f5 | 739 | static bool once = true; |
bf1ae1f4 DDAG |
740 | |
741 | if (!deferred_incoming) { | |
4debb5f5 | 742 | error_setg(errp, "For use with '-incoming defer'"); |
bf1ae1f4 DDAG |
743 | return; |
744 | } | |
4debb5f5 DDAG |
745 | if (!once) { |
746 | error_setg(errp, "The incoming migration has already been started"); | |
747 | } | |
bf1ae1f4 DDAG |
748 | |
749 | qemu_start_incoming_migration(uri, &local_err); | |
750 | ||
751 | if (local_err) { | |
752 | error_propagate(errp, local_err); | |
753 | return; | |
754 | } | |
755 | ||
4debb5f5 | 756 | once = false; |
bf1ae1f4 DDAG |
757 | } |
758 | ||
e1c37d0e LC |
759 | void qmp_migrate(const char *uri, bool has_blk, bool blk, |
760 | bool has_inc, bool inc, bool has_detach, bool detach, | |
761 | Error **errp) | |
cab30143 | 762 | { |
be7059cd | 763 | Error *local_err = NULL; |
17549e84 | 764 | MigrationState *s = migrate_get_current(); |
6607ae23 | 765 | MigrationParams params; |
cab30143 | 766 | const char *p; |
cab30143 | 767 | |
8c0426ae PP |
768 | params.blk = has_blk && blk; |
769 | params.shared = has_inc && inc; | |
6607ae23 | 770 | |
31194731 HZ |
771 | if (s->state == MIGRATION_STATUS_ACTIVE || |
772 | s->state == MIGRATION_STATUS_SETUP || | |
773 | s->state == MIGRATION_STATUS_CANCELLING) { | |
c6bd8c70 | 774 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
e1c37d0e | 775 | return; |
cab30143 | 776 | } |
ca99993a DDAG |
777 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
778 | error_setg(errp, "Guest is waiting for an incoming migration"); | |
779 | return; | |
780 | } | |
781 | ||
e1c37d0e LC |
782 | if (qemu_savevm_state_blocked(errp)) { |
783 | return; | |
cab30143 JQ |
784 | } |
785 | ||
fa2756b7 | 786 | if (migration_blockers) { |
e1c37d0e LC |
787 | *errp = error_copy(migration_blockers->data); |
788 | return; | |
fa2756b7 AL |
789 | } |
790 | ||
656a2334 JQ |
791 | /* We are starting a new migration, so we want to start in a clean |
792 | state. This change is only needed if previous migration | |
793 | failed/was cancelled. We don't use migrate_set_state() because | |
794 | we are setting the initial state, not changing it. */ | |
795 | s->state = MIGRATION_STATUS_NONE; | |
796 | ||
6607ae23 | 797 | s = migrate_init(¶ms); |
cab30143 JQ |
798 | |
799 | if (strstart(uri, "tcp:", &p)) { | |
f37afb5a | 800 | tcp_start_outgoing_migration(s, p, &local_err); |
2da776db | 801 | #ifdef CONFIG_RDMA |
41310c68 | 802 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
803 | rdma_start_outgoing_migration(s, p, &local_err); |
804 | #endif | |
cab30143 JQ |
805 | #if !defined(WIN32) |
806 | } else if (strstart(uri, "exec:", &p)) { | |
f37afb5a | 807 | exec_start_outgoing_migration(s, p, &local_err); |
cab30143 | 808 | } else if (strstart(uri, "unix:", &p)) { |
f37afb5a | 809 | unix_start_outgoing_migration(s, p, &local_err); |
cab30143 | 810 | } else if (strstart(uri, "fd:", &p)) { |
f37afb5a | 811 | fd_start_outgoing_migration(s, p, &local_err); |
cab30143 | 812 | #endif |
99a0db9b | 813 | } else { |
c6bd8c70 MA |
814 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "uri", |
815 | "a valid migration protocol"); | |
7844337d | 816 | migrate_set_state(s, MIGRATION_STATUS_SETUP, MIGRATION_STATUS_FAILED); |
e1c37d0e | 817 | return; |
cab30143 JQ |
818 | } |
819 | ||
f37afb5a | 820 | if (local_err) { |
342ab8d1 | 821 | migrate_fd_error(s); |
f37afb5a | 822 | error_propagate(errp, local_err); |
e1c37d0e | 823 | return; |
1299c631 | 824 | } |
cab30143 JQ |
825 | } |
826 | ||
6cdedb07 | 827 | void qmp_migrate_cancel(Error **errp) |
cab30143 | 828 | { |
17549e84 | 829 | migrate_fd_cancel(migrate_get_current()); |
cab30143 JQ |
830 | } |
831 | ||
9e1ba4cc OW |
832 | void qmp_migrate_set_cache_size(int64_t value, Error **errp) |
833 | { | |
834 | MigrationState *s = migrate_get_current(); | |
c91e681a | 835 | int64_t new_size; |
9e1ba4cc OW |
836 | |
837 | /* Check for truncation */ | |
838 | if (value != (size_t)value) { | |
c6bd8c70 MA |
839 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
840 | "exceeding address space"); | |
9e1ba4cc OW |
841 | return; |
842 | } | |
843 | ||
a5615b14 OW |
844 | /* Cache should not be larger than guest ram size */ |
845 | if (value > ram_bytes_total()) { | |
c6bd8c70 MA |
846 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
847 | "exceeds guest ram size "); | |
a5615b14 OW |
848 | return; |
849 | } | |
850 | ||
c91e681a OW |
851 | new_size = xbzrle_cache_resize(value); |
852 | if (new_size < 0) { | |
c6bd8c70 MA |
853 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
854 | "is smaller than page size"); | |
c91e681a OW |
855 | return; |
856 | } | |
857 | ||
858 | s->xbzrle_cache_size = new_size; | |
9e1ba4cc OW |
859 | } |
860 | ||
861 | int64_t qmp_query_migrate_cache_size(Error **errp) | |
862 | { | |
863 | return migrate_xbzrle_cache_size(); | |
864 | } | |
865 | ||
3dc85383 | 866 | void qmp_migrate_set_speed(int64_t value, Error **errp) |
cab30143 | 867 | { |
cab30143 JQ |
868 | MigrationState *s; |
869 | ||
3dc85383 LC |
870 | if (value < 0) { |
871 | value = 0; | |
99a0db9b | 872 | } |
442773ce PB |
873 | if (value > SIZE_MAX) { |
874 | value = SIZE_MAX; | |
875 | } | |
cab30143 | 876 | |
17549e84 | 877 | s = migrate_get_current(); |
3dc85383 | 878 | s->bandwidth_limit = value; |
442773ce PB |
879 | if (s->file) { |
880 | qemu_file_set_rate_limit(s->file, s->bandwidth_limit / XFER_LIMIT_RATIO); | |
881 | } | |
cab30143 JQ |
882 | } |
883 | ||
4f0a993b | 884 | void qmp_migrate_set_downtime(double value, Error **errp) |
cab30143 | 885 | { |
4f0a993b LC |
886 | value *= 1e9; |
887 | value = MAX(0, MIN(UINT64_MAX, value)); | |
888 | max_downtime = (uint64_t)value; | |
99a0db9b | 889 | } |
17ad9b35 | 890 | |
bde1e2ec CV |
891 | bool migrate_auto_converge(void) |
892 | { | |
893 | MigrationState *s; | |
894 | ||
895 | s = migrate_get_current(); | |
896 | ||
897 | return s->enabled_capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; | |
898 | } | |
899 | ||
323004a3 PL |
900 | bool migrate_zero_blocks(void) |
901 | { | |
902 | MigrationState *s; | |
903 | ||
904 | s = migrate_get_current(); | |
905 | ||
906 | return s->enabled_capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS]; | |
907 | } | |
908 | ||
8706d2d5 LL |
909 | bool migrate_use_compression(void) |
910 | { | |
dde4e694 LL |
911 | MigrationState *s; |
912 | ||
913 | s = migrate_get_current(); | |
914 | ||
915 | return s->enabled_capabilities[MIGRATION_CAPABILITY_COMPRESS]; | |
8706d2d5 LL |
916 | } |
917 | ||
918 | int migrate_compress_level(void) | |
919 | { | |
920 | MigrationState *s; | |
921 | ||
922 | s = migrate_get_current(); | |
923 | ||
43c60a81 | 924 | return s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL]; |
8706d2d5 LL |
925 | } |
926 | ||
927 | int migrate_compress_threads(void) | |
928 | { | |
929 | MigrationState *s; | |
930 | ||
931 | s = migrate_get_current(); | |
932 | ||
43c60a81 | 933 | return s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS]; |
8706d2d5 LL |
934 | } |
935 | ||
3fcb38c2 LL |
936 | int migrate_decompress_threads(void) |
937 | { | |
938 | MigrationState *s; | |
939 | ||
940 | s = migrate_get_current(); | |
941 | ||
43c60a81 | 942 | return s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; |
3fcb38c2 LL |
943 | } |
944 | ||
b05dc723 JQ |
945 | bool migrate_use_events(void) |
946 | { | |
947 | MigrationState *s; | |
948 | ||
949 | s = migrate_get_current(); | |
950 | ||
951 | return s->enabled_capabilities[MIGRATION_CAPABILITY_EVENTS]; | |
952 | } | |
953 | ||
17ad9b35 OW |
954 | int migrate_use_xbzrle(void) |
955 | { | |
956 | MigrationState *s; | |
957 | ||
958 | s = migrate_get_current(); | |
959 | ||
960 | return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE]; | |
961 | } | |
962 | ||
963 | int64_t migrate_xbzrle_cache_size(void) | |
964 | { | |
965 | MigrationState *s; | |
966 | ||
967 | s = migrate_get_current(); | |
968 | ||
969 | return s->xbzrle_cache_size; | |
970 | } | |
0d82d0e8 | 971 | |
09f6c85e DDAG |
972 | /** |
973 | * migration_completion: Used by migration_thread when there's not much left. | |
974 | * The caller 'breaks' the loop when this returns. | |
975 | * | |
976 | * @s: Current migration state | |
977 | * @*old_vm_running: Pointer to old_vm_running flag | |
978 | * @*start_time: Pointer to time to update | |
979 | */ | |
980 | static void migration_completion(MigrationState *s, bool *old_vm_running, | |
981 | int64_t *start_time) | |
982 | { | |
983 | int ret; | |
984 | ||
985 | qemu_mutex_lock_iothread(); | |
986 | *start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); | |
987 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER); | |
988 | *old_vm_running = runstate_is_running(); | |
989 | ||
990 | ret = global_state_store(); | |
991 | if (!ret) { | |
992 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); | |
993 | if (ret >= 0) { | |
994 | qemu_file_set_rate_limit(s->file, INT64_MAX); | |
995 | qemu_savevm_state_complete(s->file); | |
996 | } | |
997 | } | |
998 | qemu_mutex_unlock_iothread(); | |
999 | ||
1000 | if (ret < 0) { | |
1001 | goto fail; | |
1002 | } | |
1003 | ||
1004 | if (qemu_file_get_error(s->file)) { | |
1005 | trace_migration_completion_file_err(); | |
1006 | goto fail; | |
1007 | } | |
1008 | ||
1009 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, MIGRATION_STATUS_COMPLETED); | |
1010 | return; | |
1011 | ||
1012 | fail: | |
1013 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, MIGRATION_STATUS_FAILED); | |
1014 | } | |
1015 | ||
0d82d0e8 JQ |
1016 | /* migration thread support */ |
1017 | ||
5f496a1b | 1018 | static void *migration_thread(void *opaque) |
0d82d0e8 | 1019 | { |
9848a404 | 1020 | MigrationState *s = opaque; |
bc72ad67 AB |
1021 | int64_t initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
1022 | int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST); | |
be7172e2 | 1023 | int64_t initial_bytes = 0; |
0d82d0e8 | 1024 | int64_t max_size = 0; |
a3fa1d78 PB |
1025 | int64_t start_time = initial_time; |
1026 | bool old_vm_running = false; | |
76f5933a | 1027 | |
ab28bd23 PB |
1028 | rcu_register_thread(); |
1029 | ||
f796baa1 | 1030 | qemu_savevm_state_header(s->file); |
dba433c0 | 1031 | qemu_savevm_state_begin(s->file, &s->params); |
0d82d0e8 | 1032 | |
bc72ad67 | 1033 | s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start; |
31194731 | 1034 | migrate_set_state(s, MIGRATION_STATUS_SETUP, MIGRATION_STATUS_ACTIVE); |
29ae8a41 | 1035 | |
31194731 | 1036 | while (s->state == MIGRATION_STATUS_ACTIVE) { |
a3e879cd | 1037 | int64_t current_time; |
c369f40d | 1038 | uint64_t pending_size; |
0d82d0e8 | 1039 | |
a0ff044b | 1040 | if (!qemu_file_rate_limit(s->file)) { |
c369f40d | 1041 | pending_size = qemu_savevm_state_pending(s->file, max_size); |
9013dca5 | 1042 | trace_migrate_pending(pending_size, max_size); |
b22ff1fb | 1043 | if (pending_size && pending_size >= max_size) { |
dba433c0 | 1044 | qemu_savevm_state_iterate(s->file); |
c369f40d | 1045 | } else { |
09f6c85e DDAG |
1046 | trace_migration_thread_low_pending(pending_size); |
1047 | migration_completion(s, &old_vm_running, &start_time); | |
1048 | break; | |
c369f40d JQ |
1049 | } |
1050 | } | |
f4410a5d | 1051 | |
fd45ee2c | 1052 | if (qemu_file_get_error(s->file)) { |
31194731 HZ |
1053 | migrate_set_state(s, MIGRATION_STATUS_ACTIVE, |
1054 | MIGRATION_STATUS_FAILED); | |
fd45ee2c PB |
1055 | break; |
1056 | } | |
bc72ad67 | 1057 | current_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0d82d0e8 | 1058 | if (current_time >= initial_time + BUFFER_DELAY) { |
be7172e2 | 1059 | uint64_t transferred_bytes = qemu_ftell(s->file) - initial_bytes; |
77417f10 | 1060 | uint64_t time_spent = current_time - initial_time; |
0d82d0e8 JQ |
1061 | double bandwidth = transferred_bytes / time_spent; |
1062 | max_size = bandwidth * migrate_max_downtime() / 1000000; | |
1063 | ||
7e114f8c MH |
1064 | s->mbps = time_spent ? (((double) transferred_bytes * 8.0) / |
1065 | ((double) time_spent / 1000.0)) / 1000.0 / 1000.0 : -1; | |
1066 | ||
9013dca5 AK |
1067 | trace_migrate_transferred(transferred_bytes, time_spent, |
1068 | bandwidth, max_size); | |
90f8ae72 JQ |
1069 | /* if we haven't sent anything, we don't want to recalculate |
1070 | 10000 is a small enough number for our purposes */ | |
1071 | if (s->dirty_bytes_rate && transferred_bytes > 10000) { | |
1072 | s->expected_downtime = s->dirty_bytes_rate / bandwidth; | |
1073 | } | |
0d82d0e8 | 1074 | |
1964a397 | 1075 | qemu_file_reset_rate_limit(s->file); |
0d82d0e8 | 1076 | initial_time = current_time; |
be7172e2 | 1077 | initial_bytes = qemu_ftell(s->file); |
0d82d0e8 | 1078 | } |
a0ff044b | 1079 | if (qemu_file_rate_limit(s->file)) { |
0d82d0e8 JQ |
1080 | /* usleep expects microseconds */ |
1081 | g_usleep((initial_time + BUFFER_DELAY - current_time)*1000); | |
1082 | } | |
a3fa1d78 PB |
1083 | } |
1084 | ||
070afca2 JH |
1085 | /* If we enabled cpu throttling for auto-converge, turn it off. */ |
1086 | cpu_throttle_stop(); | |
1087 | ||
f4410a5d | 1088 | qemu_mutex_lock_iothread(); |
31194731 | 1089 | if (s->state == MIGRATION_STATUS_COMPLETED) { |
bc72ad67 | 1090 | int64_t end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
d6ed7312 | 1091 | uint64_t transferred_bytes = qemu_ftell(s->file); |
a3fa1d78 PB |
1092 | s->total_time = end_time - s->total_time; |
1093 | s->downtime = end_time - start_time; | |
d6ed7312 PL |
1094 | if (s->total_time) { |
1095 | s->mbps = (((double) transferred_bytes * 8.0) / | |
1096 | ((double) s->total_time)) / 1000; | |
1097 | } | |
a3fa1d78 PB |
1098 | runstate_set(RUN_STATE_POSTMIGRATE); |
1099 | } else { | |
1100 | if (old_vm_running) { | |
a3fa1d78 | 1101 | vm_start(); |
dba433c0 | 1102 | } |
0d82d0e8 | 1103 | } |
bb1fadc4 | 1104 | qemu_bh_schedule(s->cleanup_bh); |
dba433c0 | 1105 | qemu_mutex_unlock_iothread(); |
f4410a5d | 1106 | |
ab28bd23 | 1107 | rcu_unregister_thread(); |
0d82d0e8 JQ |
1108 | return NULL; |
1109 | } | |
1110 | ||
9848a404 | 1111 | void migrate_fd_connect(MigrationState *s) |
0d82d0e8 | 1112 | { |
cc283e3b JQ |
1113 | /* This is a best 1st approximation. ns to ms */ |
1114 | s->expected_downtime = max_downtime/1000000; | |
bb1fadc4 | 1115 | s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s); |
0d82d0e8 | 1116 | |
442773ce PB |
1117 | qemu_file_set_rate_limit(s->file, |
1118 | s->bandwidth_limit / XFER_LIMIT_RATIO); | |
1119 | ||
9287ac27 SH |
1120 | /* Notify before starting migration thread */ |
1121 | notifier_list_notify(&migration_state_notifiers, s); | |
1122 | ||
8706d2d5 | 1123 | migrate_compress_threads_create(); |
4900116e | 1124 | qemu_thread_create(&s->thread, "migration", migration_thread, s, |
bb1fadc4 | 1125 | QEMU_THREAD_JOINABLE); |
0d82d0e8 | 1126 | } |