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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 | ||
1393a485 | 16 | #include "qemu/osdep.h" |
f348b6d1 | 17 | #include "qemu/cutils.h" |
d49b6836 | 18 | #include "qemu/error-report.h" |
6a1751b7 | 19 | #include "qemu/main-loop.h" |
caf71f86 | 20 | #include "migration/migration.h" |
0d82d0e8 | 21 | #include "migration/qemu-file.h" |
9c17d615 | 22 | #include "sysemu/sysemu.h" |
737e150e | 23 | #include "block/block.h" |
cc7a8ea7 | 24 | #include "qapi/qmp/qerror.h" |
6c595cde | 25 | #include "qapi/util.h" |
1de7afc9 | 26 | #include "qemu/sockets.h" |
ab28bd23 | 27 | #include "qemu/rcu.h" |
caf71f86 | 28 | #include "migration/block.h" |
e0b266f0 | 29 | #include "migration/postcopy-ram.h" |
766bd176 | 30 | #include "qemu/thread.h" |
791e7c82 | 31 | #include "qmp-commands.h" |
c09e5bb1 | 32 | #include "trace.h" |
598cd2bd | 33 | #include "qapi-event.h" |
070afca2 | 34 | #include "qom/cpu.h" |
6c595cde DDAG |
35 | #include "exec/memory.h" |
36 | #include "exec/address-spaces.h" | |
61b67d47 | 37 | #include "io/channel-buffer.h" |
e1226365 | 38 | #include "io/channel-tls.h" |
35a6ed4f | 39 | #include "migration/colo.h" |
065e2813 | 40 | |
dc325627 | 41 | #define MAX_THROTTLE (32 << 20) /* Migration transfer speed throttling */ |
5bb7910a | 42 | |
5b4e1eb7 JQ |
43 | /* Amount of time to allocate to each "chunk" of bandwidth-throttled |
44 | * data. */ | |
45 | #define BUFFER_DELAY 100 | |
46 | #define XFER_LIMIT_RATIO (1000 / BUFFER_DELAY) | |
47 | ||
2ff30257 AA |
48 | /* Time in milliseconds we are allowed to stop the source, |
49 | * for sending the last part */ | |
50 | #define DEFAULT_MIGRATE_SET_DOWNTIME 300 | |
51 | ||
8706d2d5 LL |
52 | /* Default compression thread count */ |
53 | #define DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT 8 | |
3fcb38c2 LL |
54 | /* Default decompression thread count, usually decompression is at |
55 | * least 4 times as fast as compression.*/ | |
56 | #define DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT 2 | |
8706d2d5 LL |
57 | /*0: means nocompress, 1: best speed, ... 9: best compress ratio */ |
58 | #define DEFAULT_MIGRATE_COMPRESS_LEVEL 1 | |
1626fee3 | 59 | /* Define default autoconverge cpu throttle migration parameters */ |
d85a31d1 JH |
60 | #define DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL 20 |
61 | #define DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT 10 | |
8706d2d5 | 62 | |
17ad9b35 OW |
63 | /* Migration XBZRLE default cache size */ |
64 | #define DEFAULT_MIGRATE_CACHE_SIZE (64 * 1024 * 1024) | |
65 | ||
68b53591 HZ |
66 | /* The delay time (in ms) between two COLO checkpoints |
67 | * Note: Please change this default value to 10000 when we support hybrid mode. | |
68 | */ | |
69 | #define DEFAULT_MIGRATE_X_CHECKPOINT_DELAY 200 | |
70 | ||
99a0db9b GH |
71 | static NotifierList migration_state_notifiers = |
72 | NOTIFIER_LIST_INITIALIZER(migration_state_notifiers); | |
73 | ||
adde220a DDAG |
74 | static bool deferred_incoming; |
75 | ||
093e3c42 DDAG |
76 | /* |
77 | * Current state of incoming postcopy; note this is not part of | |
78 | * MigrationIncomingState since it's state is used during cleanup | |
79 | * at the end as MIS is being freed. | |
80 | */ | |
81 | static PostcopyState incoming_postcopy_state; | |
82 | ||
17549e84 JQ |
83 | /* When we add fault tolerance, we could have several |
84 | migrations at once. For now we don't need to add | |
85 | dynamic creation of migration */ | |
86 | ||
bca7856a | 87 | /* For outgoing */ |
859bc756 | 88 | MigrationState *migrate_get_current(void) |
17549e84 | 89 | { |
6c595cde | 90 | static bool once; |
17549e84 | 91 | static MigrationState current_migration = { |
31194731 | 92 | .state = MIGRATION_STATUS_NONE, |
17ad9b35 | 93 | .xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE, |
7e114f8c | 94 | .mbps = -1, |
2594f56d DB |
95 | .parameters = { |
96 | .compress_level = DEFAULT_MIGRATE_COMPRESS_LEVEL, | |
97 | .compress_threads = DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT, | |
98 | .decompress_threads = DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT, | |
99 | .cpu_throttle_initial = DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL, | |
100 | .cpu_throttle_increment = DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT, | |
2ff30257 AA |
101 | .max_bandwidth = MAX_THROTTLE, |
102 | .downtime_limit = DEFAULT_MIGRATE_SET_DOWNTIME, | |
68b53591 | 103 | .x_checkpoint_delay = DEFAULT_MIGRATE_X_CHECKPOINT_DELAY, |
2594f56d | 104 | }, |
17549e84 JQ |
105 | }; |
106 | ||
6c595cde DDAG |
107 | if (!once) { |
108 | qemu_mutex_init(¤t_migration.src_page_req_mutex); | |
109 | once = true; | |
110 | } | |
17549e84 JQ |
111 | return ¤t_migration; |
112 | } | |
113 | ||
bca7856a DDAG |
114 | /* For incoming */ |
115 | static MigrationIncomingState *mis_current; | |
116 | ||
117 | MigrationIncomingState *migration_incoming_get_current(void) | |
118 | { | |
119 | return mis_current; | |
120 | } | |
121 | ||
122 | MigrationIncomingState *migration_incoming_state_new(QEMUFile* f) | |
123 | { | |
97f3ad35 | 124 | mis_current = g_new0(MigrationIncomingState, 1); |
42e2aa56 | 125 | mis_current->from_src_file = f; |
93d7af6f | 126 | mis_current->state = MIGRATION_STATUS_NONE; |
1a8f46f8 | 127 | QLIST_INIT(&mis_current->loadvm_handlers); |
6decec93 | 128 | qemu_mutex_init(&mis_current->rp_mutex); |
7b89bf27 | 129 | qemu_event_init(&mis_current->main_thread_load_event, false); |
bca7856a DDAG |
130 | |
131 | return mis_current; | |
132 | } | |
133 | ||
134 | void migration_incoming_state_destroy(void) | |
135 | { | |
7b89bf27 | 136 | qemu_event_destroy(&mis_current->main_thread_load_event); |
1a8f46f8 | 137 | loadvm_free_handlers(mis_current); |
bca7856a DDAG |
138 | g_free(mis_current); |
139 | mis_current = NULL; | |
140 | } | |
141 | ||
df4b1024 JQ |
142 | |
143 | typedef struct { | |
13d16814 | 144 | bool optional; |
df4b1024 JQ |
145 | uint32_t size; |
146 | uint8_t runstate[100]; | |
172c4356 JQ |
147 | RunState state; |
148 | bool received; | |
df4b1024 JQ |
149 | } GlobalState; |
150 | ||
151 | static GlobalState global_state; | |
152 | ||
560d027b | 153 | int global_state_store(void) |
df4b1024 JQ |
154 | { |
155 | if (!runstate_store((char *)global_state.runstate, | |
156 | sizeof(global_state.runstate))) { | |
157 | error_report("runstate name too big: %s", global_state.runstate); | |
158 | trace_migrate_state_too_big(); | |
159 | return -EINVAL; | |
160 | } | |
161 | return 0; | |
162 | } | |
163 | ||
c69adea4 AP |
164 | void global_state_store_running(void) |
165 | { | |
166 | const char *state = RunState_lookup[RUN_STATE_RUNNING]; | |
167 | strncpy((char *)global_state.runstate, | |
168 | state, sizeof(global_state.runstate)); | |
169 | } | |
170 | ||
172c4356 | 171 | static bool global_state_received(void) |
df4b1024 | 172 | { |
172c4356 JQ |
173 | return global_state.received; |
174 | } | |
175 | ||
176 | static RunState global_state_get_runstate(void) | |
177 | { | |
178 | return global_state.state; | |
df4b1024 JQ |
179 | } |
180 | ||
13d16814 JQ |
181 | void global_state_set_optional(void) |
182 | { | |
183 | global_state.optional = true; | |
184 | } | |
185 | ||
186 | static bool global_state_needed(void *opaque) | |
187 | { | |
188 | GlobalState *s = opaque; | |
189 | char *runstate = (char *)s->runstate; | |
190 | ||
191 | /* If it is not optional, it is mandatory */ | |
192 | ||
193 | if (s->optional == false) { | |
194 | return true; | |
195 | } | |
196 | ||
197 | /* If state is running or paused, it is not needed */ | |
198 | ||
199 | if (strcmp(runstate, "running") == 0 || | |
200 | strcmp(runstate, "paused") == 0) { | |
201 | return false; | |
202 | } | |
203 | ||
204 | /* for any other state it is needed */ | |
205 | return true; | |
206 | } | |
207 | ||
df4b1024 JQ |
208 | static int global_state_post_load(void *opaque, int version_id) |
209 | { | |
210 | GlobalState *s = opaque; | |
172c4356 JQ |
211 | Error *local_err = NULL; |
212 | int r; | |
df4b1024 JQ |
213 | char *runstate = (char *)s->runstate; |
214 | ||
172c4356 | 215 | s->received = true; |
df4b1024 JQ |
216 | trace_migrate_global_state_post_load(runstate); |
217 | ||
7fb1cf16 | 218 | r = qapi_enum_parse(RunState_lookup, runstate, RUN_STATE__MAX, |
df4b1024 JQ |
219 | -1, &local_err); |
220 | ||
172c4356 JQ |
221 | if (r == -1) { |
222 | if (local_err) { | |
223 | error_report_err(local_err); | |
df4b1024 | 224 | } |
172c4356 | 225 | return -EINVAL; |
df4b1024 | 226 | } |
172c4356 | 227 | s->state = r; |
df4b1024 | 228 | |
172c4356 | 229 | return 0; |
df4b1024 JQ |
230 | } |
231 | ||
232 | static void global_state_pre_save(void *opaque) | |
233 | { | |
234 | GlobalState *s = opaque; | |
235 | ||
236 | trace_migrate_global_state_pre_save((char *)s->runstate); | |
237 | s->size = strlen((char *)s->runstate) + 1; | |
238 | } | |
239 | ||
240 | static const VMStateDescription vmstate_globalstate = { | |
241 | .name = "globalstate", | |
242 | .version_id = 1, | |
243 | .minimum_version_id = 1, | |
244 | .post_load = global_state_post_load, | |
245 | .pre_save = global_state_pre_save, | |
13d16814 | 246 | .needed = global_state_needed, |
df4b1024 JQ |
247 | .fields = (VMStateField[]) { |
248 | VMSTATE_UINT32(size, GlobalState), | |
249 | VMSTATE_BUFFER(runstate, GlobalState), | |
250 | VMSTATE_END_OF_LIST() | |
251 | }, | |
252 | }; | |
253 | ||
254 | void register_global_state(void) | |
255 | { | |
256 | /* We would use it independently that we receive it */ | |
257 | strcpy((char *)&global_state.runstate, ""); | |
172c4356 | 258 | global_state.received = false; |
df4b1024 JQ |
259 | vmstate_register(NULL, 0, &vmstate_globalstate, &global_state); |
260 | } | |
261 | ||
b05dc723 JQ |
262 | static void migrate_generate_event(int new_state) |
263 | { | |
264 | if (migrate_use_events()) { | |
265 | qapi_event_send_migration(new_state, &error_abort); | |
b05dc723 JQ |
266 | } |
267 | } | |
268 | ||
adde220a DDAG |
269 | /* |
270 | * Called on -incoming with a defer: uri. | |
271 | * The migration can be started later after any parameters have been | |
272 | * changed. | |
273 | */ | |
274 | static void deferred_incoming_migration(Error **errp) | |
275 | { | |
276 | if (deferred_incoming) { | |
277 | error_setg(errp, "Incoming migration already deferred"); | |
278 | } | |
279 | deferred_incoming = true; | |
280 | } | |
281 | ||
1e2d90eb DDAG |
282 | /* Request a range of pages from the source VM at the given |
283 | * start address. | |
284 | * rbname: Name of the RAMBlock to request the page in, if NULL it's the same | |
285 | * as the last request (a name must have been given previously) | |
286 | * Start: Address offset within the RB | |
287 | * Len: Length in bytes required - must be a multiple of pagesize | |
288 | */ | |
289 | void migrate_send_rp_req_pages(MigrationIncomingState *mis, const char *rbname, | |
290 | ram_addr_t start, size_t len) | |
291 | { | |
cb8d4c8f | 292 | uint8_t bufc[12 + 1 + 255]; /* start (8), len (4), rbname up to 256 */ |
1e2d90eb DDAG |
293 | size_t msglen = 12; /* start + len */ |
294 | ||
295 | *(uint64_t *)bufc = cpu_to_be64((uint64_t)start); | |
296 | *(uint32_t *)(bufc + 8) = cpu_to_be32((uint32_t)len); | |
297 | ||
298 | if (rbname) { | |
299 | int rbname_len = strlen(rbname); | |
300 | assert(rbname_len < 256); | |
301 | ||
302 | bufc[msglen++] = rbname_len; | |
303 | memcpy(bufc + msglen, rbname, rbname_len); | |
304 | msglen += rbname_len; | |
305 | migrate_send_rp_message(mis, MIG_RP_MSG_REQ_PAGES_ID, msglen, bufc); | |
306 | } else { | |
307 | migrate_send_rp_message(mis, MIG_RP_MSG_REQ_PAGES, msglen, bufc); | |
308 | } | |
309 | } | |
310 | ||
43eaae28 | 311 | void qemu_start_incoming_migration(const char *uri, Error **errp) |
5bb7910a | 312 | { |
34c9dd8e AL |
313 | const char *p; |
314 | ||
7cf1fe6d | 315 | qapi_event_send_migration(MIGRATION_STATUS_SETUP, &error_abort); |
adde220a DDAG |
316 | if (!strcmp(uri, "defer")) { |
317 | deferred_incoming_migration(errp); | |
318 | } else if (strstart(uri, "tcp:", &p)) { | |
43eaae28 | 319 | tcp_start_incoming_migration(p, errp); |
2da776db | 320 | #ifdef CONFIG_RDMA |
adde220a | 321 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
322 | rdma_start_incoming_migration(p, errp); |
323 | #endif | |
adde220a | 324 | } else if (strstart(uri, "exec:", &p)) { |
43eaae28 | 325 | exec_start_incoming_migration(p, errp); |
adde220a | 326 | } else if (strstart(uri, "unix:", &p)) { |
43eaae28 | 327 | unix_start_incoming_migration(p, errp); |
adde220a | 328 | } else if (strstart(uri, "fd:", &p)) { |
43eaae28 | 329 | fd_start_incoming_migration(p, errp); |
adde220a | 330 | } else { |
312fd5f2 | 331 | error_setg(errp, "unknown migration protocol: %s", uri); |
8ca5e801 | 332 | } |
5bb7910a AL |
333 | } |
334 | ||
0aa6aefc DL |
335 | static void process_incoming_migration_bh(void *opaque) |
336 | { | |
337 | Error *local_err = NULL; | |
338 | MigrationIncomingState *mis = opaque; | |
339 | ||
340 | /* Make sure all file formats flush their mutable metadata */ | |
341 | bdrv_invalidate_cache_all(&local_err); | |
342 | if (local_err) { | |
343 | migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, | |
344 | MIGRATION_STATUS_FAILED); | |
345 | error_report_err(local_err); | |
346 | migrate_decompress_threads_join(); | |
347 | exit(EXIT_FAILURE); | |
348 | } | |
349 | ||
350 | /* | |
351 | * This must happen after all error conditions are dealt with and | |
352 | * we're sure the VM is going to be running on this host. | |
353 | */ | |
354 | qemu_announce_self(); | |
355 | ||
356 | /* If global state section was not received or we are in running | |
357 | state, we need to obey autostart. Any other state is set with | |
358 | runstate_set. */ | |
359 | ||
360 | if (!global_state_received() || | |
361 | global_state_get_runstate() == RUN_STATE_RUNNING) { | |
362 | if (autostart) { | |
363 | vm_start(); | |
364 | } else { | |
365 | runstate_set(RUN_STATE_PAUSED); | |
366 | } | |
367 | } else { | |
368 | runstate_set(global_state_get_runstate()); | |
369 | } | |
370 | migrate_decompress_threads_join(); | |
371 | /* | |
372 | * This must happen after any state changes since as soon as an external | |
373 | * observer sees this event they might start to prod at the VM assuming | |
374 | * it's ready to use. | |
375 | */ | |
376 | migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, | |
377 | MIGRATION_STATUS_COMPLETED); | |
378 | qemu_bh_delete(mis->bh); | |
379 | migration_incoming_state_destroy(); | |
380 | } | |
381 | ||
82a4da79 | 382 | static void process_incoming_migration_co(void *opaque) |
511c0231 | 383 | { |
82a4da79 | 384 | QEMUFile *f = opaque; |
e9bef235 DDAG |
385 | MigrationIncomingState *mis; |
386 | PostcopyState ps; | |
1c12e1f5 PB |
387 | int ret; |
388 | ||
e9bef235 | 389 | mis = migration_incoming_state_new(f); |
093e3c42 | 390 | postcopy_state_set(POSTCOPY_INCOMING_NONE); |
93d7af6f HZ |
391 | migrate_set_state(&mis->state, MIGRATION_STATUS_NONE, |
392 | MIGRATION_STATUS_ACTIVE); | |
1c12e1f5 | 393 | ret = qemu_loadvm_state(f); |
bca7856a | 394 | |
e9bef235 DDAG |
395 | ps = postcopy_state_get(); |
396 | trace_process_incoming_migration_co_end(ret, ps); | |
397 | if (ps != POSTCOPY_INCOMING_NONE) { | |
398 | if (ps == POSTCOPY_INCOMING_ADVISE) { | |
399 | /* | |
400 | * Where a migration had postcopy enabled (and thus went to advise) | |
401 | * but managed to complete within the precopy period, we can use | |
402 | * the normal exit. | |
403 | */ | |
404 | postcopy_ram_incoming_cleanup(mis); | |
405 | } else if (ret >= 0) { | |
406 | /* | |
407 | * Postcopy was started, cleanup should happen at the end of the | |
408 | * postcopy thread. | |
409 | */ | |
410 | trace_process_incoming_migration_co_postcopy_end_main(); | |
411 | return; | |
412 | } | |
413 | /* Else if something went wrong then just fall out of the normal exit */ | |
414 | } | |
415 | ||
25d0c16f HZ |
416 | /* we get COLO info, and know if we are in COLO mode */ |
417 | if (!ret && migration_incoming_enable_colo()) { | |
418 | mis->migration_incoming_co = qemu_coroutine_self(); | |
419 | qemu_thread_create(&mis->colo_incoming_thread, "COLO incoming", | |
420 | colo_process_incoming_thread, mis, QEMU_THREAD_JOINABLE); | |
421 | mis->have_colo_incoming_thread = true; | |
422 | qemu_coroutine_yield(); | |
423 | ||
424 | /* Wait checkpoint incoming thread exit before free resource */ | |
425 | qemu_thread_join(&mis->colo_incoming_thread); | |
426 | } | |
427 | ||
1c12e1f5 | 428 | qemu_fclose(f); |
905f26f2 | 429 | free_xbzrle_decoded_buf(); |
bca7856a | 430 | |
1c12e1f5 | 431 | if (ret < 0) { |
93d7af6f HZ |
432 | migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, |
433 | MIGRATION_STATUS_FAILED); | |
db80face | 434 | error_report("load of migration failed: %s", strerror(-ret)); |
3fcb38c2 | 435 | migrate_decompress_threads_join(); |
4aead692 | 436 | exit(EXIT_FAILURE); |
511c0231 | 437 | } |
511c0231 | 438 | |
0aa6aefc DL |
439 | mis->bh = qemu_bh_new(process_incoming_migration_bh, mis); |
440 | qemu_bh_schedule(mis->bh); | |
511c0231 JQ |
441 | } |
442 | ||
22724f49 | 443 | void migration_fd_process_incoming(QEMUFile *f) |
82a4da79 | 444 | { |
0b8b8753 | 445 | Coroutine *co = qemu_coroutine_create(process_incoming_migration_co, f); |
82a4da79 | 446 | |
3fcb38c2 | 447 | migrate_decompress_threads_create(); |
06ad5135 | 448 | qemu_file_set_blocking(f, false); |
0b8b8753 | 449 | qemu_coroutine_enter(co); |
82a4da79 PB |
450 | } |
451 | ||
48f07489 | 452 | |
22724f49 DB |
453 | void migration_channel_process_incoming(MigrationState *s, |
454 | QIOChannel *ioc) | |
48f07489 | 455 | { |
e1226365 DB |
456 | trace_migration_set_incoming_channel( |
457 | ioc, object_get_typename(OBJECT(ioc))); | |
458 | ||
459 | if (s->parameters.tls_creds && | |
460 | !object_dynamic_cast(OBJECT(ioc), | |
461 | TYPE_QIO_CHANNEL_TLS)) { | |
462 | Error *local_err = NULL; | |
22724f49 | 463 | migration_tls_channel_process_incoming(s, ioc, &local_err); |
e1226365 DB |
464 | if (local_err) { |
465 | error_report_err(local_err); | |
466 | } | |
467 | } else { | |
468 | QEMUFile *f = qemu_fopen_channel_input(ioc); | |
22724f49 | 469 | migration_fd_process_incoming(f); |
e1226365 | 470 | } |
48f07489 DB |
471 | } |
472 | ||
473 | ||
22724f49 DB |
474 | void migration_channel_connect(MigrationState *s, |
475 | QIOChannel *ioc, | |
476 | const char *hostname) | |
48f07489 | 477 | { |
e1226365 DB |
478 | trace_migration_set_outgoing_channel( |
479 | ioc, object_get_typename(OBJECT(ioc)), hostname); | |
480 | ||
481 | if (s->parameters.tls_creds && | |
482 | !object_dynamic_cast(OBJECT(ioc), | |
483 | TYPE_QIO_CHANNEL_TLS)) { | |
484 | Error *local_err = NULL; | |
22724f49 | 485 | migration_tls_channel_connect(s, ioc, hostname, &local_err); |
e1226365 DB |
486 | if (local_err) { |
487 | migrate_fd_error(s, local_err); | |
488 | error_free(local_err); | |
489 | } | |
490 | } else { | |
491 | QEMUFile *f = qemu_fopen_channel_output(ioc); | |
48f07489 | 492 | |
e1226365 | 493 | s->to_dst_file = f; |
48f07489 | 494 | |
e1226365 DB |
495 | migrate_fd_connect(s); |
496 | } | |
48f07489 DB |
497 | } |
498 | ||
499 | ||
6decec93 DDAG |
500 | /* |
501 | * Send a message on the return channel back to the source | |
502 | * of the migration. | |
503 | */ | |
504 | void migrate_send_rp_message(MigrationIncomingState *mis, | |
505 | enum mig_rp_message_type message_type, | |
506 | uint16_t len, void *data) | |
507 | { | |
508 | trace_migrate_send_rp_message((int)message_type, len); | |
509 | qemu_mutex_lock(&mis->rp_mutex); | |
510 | qemu_put_be16(mis->to_src_file, (unsigned int)message_type); | |
511 | qemu_put_be16(mis->to_src_file, len); | |
512 | qemu_put_buffer(mis->to_src_file, data, len); | |
513 | qemu_fflush(mis->to_src_file); | |
514 | qemu_mutex_unlock(&mis->rp_mutex); | |
515 | } | |
516 | ||
517 | /* | |
518 | * Send a 'SHUT' message on the return channel with the given value | |
519 | * to indicate that we've finished with the RP. Non-0 value indicates | |
520 | * error. | |
521 | */ | |
522 | void migrate_send_rp_shut(MigrationIncomingState *mis, | |
523 | uint32_t value) | |
524 | { | |
525 | uint32_t buf; | |
526 | ||
527 | buf = cpu_to_be32(value); | |
528 | migrate_send_rp_message(mis, MIG_RP_MSG_SHUT, sizeof(buf), &buf); | |
529 | } | |
530 | ||
531 | /* | |
532 | * Send a 'PONG' message on the return channel with the given value | |
533 | * (normally in response to a 'PING') | |
534 | */ | |
535 | void migrate_send_rp_pong(MigrationIncomingState *mis, | |
536 | uint32_t value) | |
537 | { | |
538 | uint32_t buf; | |
539 | ||
540 | buf = cpu_to_be32(value); | |
541 | migrate_send_rp_message(mis, MIG_RP_MSG_PONG, sizeof(buf), &buf); | |
542 | } | |
543 | ||
bbf6da32 OW |
544 | MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) |
545 | { | |
546 | MigrationCapabilityStatusList *head = NULL; | |
547 | MigrationCapabilityStatusList *caps; | |
548 | MigrationState *s = migrate_get_current(); | |
549 | int i; | |
550 | ||
387eedeb | 551 | caps = NULL; /* silence compiler warning */ |
7fb1cf16 | 552 | for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { |
35a6ed4f HZ |
553 | if (i == MIGRATION_CAPABILITY_X_COLO && !colo_supported()) { |
554 | continue; | |
555 | } | |
bbf6da32 OW |
556 | if (head == NULL) { |
557 | head = g_malloc0(sizeof(*caps)); | |
558 | caps = head; | |
559 | } else { | |
560 | caps->next = g_malloc0(sizeof(*caps)); | |
561 | caps = caps->next; | |
562 | } | |
563 | caps->value = | |
564 | g_malloc(sizeof(*caps->value)); | |
565 | caps->value->capability = i; | |
566 | caps->value->state = s->enabled_capabilities[i]; | |
567 | } | |
568 | ||
569 | return head; | |
570 | } | |
571 | ||
85de8323 LL |
572 | MigrationParameters *qmp_query_migrate_parameters(Error **errp) |
573 | { | |
574 | MigrationParameters *params; | |
575 | MigrationState *s = migrate_get_current(); | |
576 | ||
577 | params = g_malloc0(sizeof(*params)); | |
de63ab61 | 578 | params->has_compress_level = true; |
2594f56d | 579 | params->compress_level = s->parameters.compress_level; |
de63ab61 | 580 | params->has_compress_threads = true; |
2594f56d | 581 | params->compress_threads = s->parameters.compress_threads; |
de63ab61 | 582 | params->has_decompress_threads = true; |
2594f56d | 583 | params->decompress_threads = s->parameters.decompress_threads; |
de63ab61 | 584 | params->has_cpu_throttle_initial = true; |
2594f56d | 585 | params->cpu_throttle_initial = s->parameters.cpu_throttle_initial; |
de63ab61 | 586 | params->has_cpu_throttle_increment = true; |
2594f56d | 587 | params->cpu_throttle_increment = s->parameters.cpu_throttle_increment; |
de63ab61 | 588 | params->has_tls_creds = !!s->parameters.tls_creds; |
69ef1f36 | 589 | params->tls_creds = g_strdup(s->parameters.tls_creds); |
de63ab61 | 590 | params->has_tls_hostname = !!s->parameters.tls_hostname; |
69ef1f36 | 591 | params->tls_hostname = g_strdup(s->parameters.tls_hostname); |
2ff30257 AA |
592 | params->has_max_bandwidth = true; |
593 | params->max_bandwidth = s->parameters.max_bandwidth; | |
594 | params->has_downtime_limit = true; | |
595 | params->downtime_limit = s->parameters.downtime_limit; | |
fe39a4d4 | 596 | params->has_x_checkpoint_delay = true; |
68b53591 | 597 | params->x_checkpoint_delay = s->parameters.x_checkpoint_delay; |
85de8323 LL |
598 | |
599 | return params; | |
600 | } | |
601 | ||
f6844b99 DDAG |
602 | /* |
603 | * Return true if we're already in the middle of a migration | |
604 | * (i.e. any of the active or setup states) | |
605 | */ | |
606 | static bool migration_is_setup_or_active(int state) | |
607 | { | |
608 | switch (state) { | |
609 | case MIGRATION_STATUS_ACTIVE: | |
9ec055ae | 610 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: |
f6844b99 DDAG |
611 | case MIGRATION_STATUS_SETUP: |
612 | return true; | |
613 | ||
614 | default: | |
615 | return false; | |
616 | ||
617 | } | |
618 | } | |
619 | ||
f36d55af OW |
620 | static void get_xbzrle_cache_stats(MigrationInfo *info) |
621 | { | |
622 | if (migrate_use_xbzrle()) { | |
623 | info->has_xbzrle_cache = true; | |
624 | info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache)); | |
625 | info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size(); | |
626 | info->xbzrle_cache->bytes = xbzrle_mig_bytes_transferred(); | |
627 | info->xbzrle_cache->pages = xbzrle_mig_pages_transferred(); | |
628 | info->xbzrle_cache->cache_miss = xbzrle_mig_pages_cache_miss(); | |
8bc39233 | 629 | info->xbzrle_cache->cache_miss_rate = xbzrle_mig_cache_miss_rate(); |
f36d55af OW |
630 | info->xbzrle_cache->overflow = xbzrle_mig_pages_overflow(); |
631 | } | |
632 | } | |
633 | ||
a22463a5 DDAG |
634 | static void populate_ram_info(MigrationInfo *info, MigrationState *s) |
635 | { | |
636 | info->has_ram = true; | |
637 | info->ram = g_malloc0(sizeof(*info->ram)); | |
638 | info->ram->transferred = ram_bytes_transferred(); | |
639 | info->ram->total = ram_bytes_total(); | |
640 | info->ram->duplicate = dup_mig_pages_transferred(); | |
641 | info->ram->skipped = skipped_mig_pages_transferred(); | |
642 | info->ram->normal = norm_mig_pages_transferred(); | |
643 | info->ram->normal_bytes = norm_mig_bytes_transferred(); | |
644 | info->ram->mbps = s->mbps; | |
645 | info->ram->dirty_sync_count = s->dirty_sync_count; | |
d3bf5418 | 646 | info->ram->postcopy_requests = s->postcopy_requests; |
a22463a5 DDAG |
647 | |
648 | if (s->state != MIGRATION_STATUS_COMPLETED) { | |
649 | info->ram->remaining = ram_bytes_remaining(); | |
650 | info->ram->dirty_pages_rate = s->dirty_pages_rate; | |
651 | } | |
652 | } | |
653 | ||
791e7c82 | 654 | MigrationInfo *qmp_query_migrate(Error **errp) |
5bb7910a | 655 | { |
791e7c82 | 656 | MigrationInfo *info = g_malloc0(sizeof(*info)); |
17549e84 JQ |
657 | MigrationState *s = migrate_get_current(); |
658 | ||
659 | switch (s->state) { | |
31194731 | 660 | case MIGRATION_STATUS_NONE: |
17549e84 JQ |
661 | /* no migration has happened ever */ |
662 | break; | |
31194731 | 663 | case MIGRATION_STATUS_SETUP: |
29ae8a41 | 664 | info->has_status = true; |
ed4fbd10 | 665 | info->has_total_time = false; |
29ae8a41 | 666 | break; |
31194731 HZ |
667 | case MIGRATION_STATUS_ACTIVE: |
668 | case MIGRATION_STATUS_CANCELLING: | |
791e7c82 | 669 | info->has_status = true; |
7aa939af | 670 | info->has_total_time = true; |
bc72ad67 | 671 | info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) |
7aa939af | 672 | - s->total_time; |
2c52ddf1 JQ |
673 | info->has_expected_downtime = true; |
674 | info->expected_downtime = s->expected_downtime; | |
ed4fbd10 MH |
675 | info->has_setup_time = true; |
676 | info->setup_time = s->setup_time; | |
17549e84 | 677 | |
a22463a5 | 678 | populate_ram_info(info, s); |
8d017193 | 679 | |
17549e84 | 680 | if (blk_mig_active()) { |
791e7c82 LC |
681 | info->has_disk = true; |
682 | info->disk = g_malloc0(sizeof(*info->disk)); | |
683 | info->disk->transferred = blk_mig_bytes_transferred(); | |
684 | info->disk->remaining = blk_mig_bytes_remaining(); | |
685 | info->disk->total = blk_mig_bytes_total(); | |
ff8d81d8 | 686 | } |
f36d55af | 687 | |
4782893e | 688 | if (cpu_throttle_active()) { |
d85a31d1 JH |
689 | info->has_cpu_throttle_percentage = true; |
690 | info->cpu_throttle_percentage = cpu_throttle_get_percentage(); | |
4782893e JH |
691 | } |
692 | ||
9ec055ae DDAG |
693 | get_xbzrle_cache_stats(info); |
694 | break; | |
695 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: | |
696 | /* Mostly the same as active; TODO add some postcopy stats */ | |
697 | info->has_status = true; | |
698 | info->has_total_time = true; | |
699 | info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) | |
700 | - s->total_time; | |
701 | info->has_expected_downtime = true; | |
702 | info->expected_downtime = s->expected_downtime; | |
703 | info->has_setup_time = true; | |
704 | info->setup_time = s->setup_time; | |
705 | ||
a22463a5 | 706 | populate_ram_info(info, s); |
9ec055ae DDAG |
707 | |
708 | if (blk_mig_active()) { | |
709 | info->has_disk = true; | |
710 | info->disk = g_malloc0(sizeof(*info->disk)); | |
711 | info->disk->transferred = blk_mig_bytes_transferred(); | |
712 | info->disk->remaining = blk_mig_bytes_remaining(); | |
713 | info->disk->total = blk_mig_bytes_total(); | |
714 | } | |
715 | ||
f36d55af | 716 | get_xbzrle_cache_stats(info); |
17549e84 | 717 | break; |
0b827d5e HZ |
718 | case MIGRATION_STATUS_COLO: |
719 | info->has_status = true; | |
720 | /* TODO: display COLO specific information (checkpoint info etc.) */ | |
721 | break; | |
31194731 | 722 | case MIGRATION_STATUS_COMPLETED: |
f36d55af OW |
723 | get_xbzrle_cache_stats(info); |
724 | ||
791e7c82 | 725 | info->has_status = true; |
00c14997 | 726 | info->has_total_time = true; |
7aa939af | 727 | info->total_time = s->total_time; |
9c5a9fcf JQ |
728 | info->has_downtime = true; |
729 | info->downtime = s->downtime; | |
ed4fbd10 MH |
730 | info->has_setup_time = true; |
731 | info->setup_time = s->setup_time; | |
d5f8a570 | 732 | |
a22463a5 | 733 | populate_ram_info(info, s); |
17549e84 | 734 | break; |
31194731 | 735 | case MIGRATION_STATUS_FAILED: |
791e7c82 | 736 | info->has_status = true; |
d59ce6f3 DB |
737 | if (s->error) { |
738 | info->has_error_desc = true; | |
739 | info->error_desc = g_strdup(error_get_pretty(s->error)); | |
740 | } | |
17549e84 | 741 | break; |
31194731 | 742 | case MIGRATION_STATUS_CANCELLED: |
791e7c82 | 743 | info->has_status = true; |
17549e84 | 744 | break; |
5bb7910a | 745 | } |
cde63fbe | 746 | info->status = s->state; |
791e7c82 LC |
747 | |
748 | return info; | |
5bb7910a AL |
749 | } |
750 | ||
00458433 OW |
751 | void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, |
752 | Error **errp) | |
753 | { | |
754 | MigrationState *s = migrate_get_current(); | |
755 | MigrationCapabilityStatusList *cap; | |
096631bd | 756 | bool old_postcopy_cap = migrate_postcopy_ram(); |
00458433 | 757 | |
f6844b99 | 758 | if (migration_is_setup_or_active(s->state)) { |
c6bd8c70 | 759 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
00458433 OW |
760 | return; |
761 | } | |
762 | ||
763 | for (cap = params; cap; cap = cap->next) { | |
35a6ed4f HZ |
764 | if (cap->value->capability == MIGRATION_CAPABILITY_X_COLO) { |
765 | if (!colo_supported()) { | |
766 | error_setg(errp, "COLO is not currently supported, please" | |
767 | " configure with --enable-colo option in order to" | |
768 | " support COLO feature"); | |
769 | continue; | |
770 | } | |
771 | } | |
00458433 OW |
772 | s->enabled_capabilities[cap->value->capability] = cap->value->state; |
773 | } | |
53dd370c DDAG |
774 | |
775 | if (migrate_postcopy_ram()) { | |
776 | if (migrate_use_compression()) { | |
777 | /* The decompression threads asynchronously write into RAM | |
778 | * rather than use the atomic copies needed to avoid | |
779 | * userfaulting. It should be possible to fix the decompression | |
780 | * threads for compatibility in future. | |
781 | */ | |
782 | error_report("Postcopy is not currently compatible with " | |
783 | "compression"); | |
32c3db5b | 784 | s->enabled_capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM] = |
53dd370c DDAG |
785 | false; |
786 | } | |
096631bd DDAG |
787 | /* This check is reasonably expensive, so only when it's being |
788 | * set the first time, also it's only the destination that needs | |
789 | * special support. | |
790 | */ | |
791 | if (!old_postcopy_cap && runstate_check(RUN_STATE_INMIGRATE) && | |
792 | !postcopy_ram_supported_by_host()) { | |
793 | /* postcopy_ram_supported_by_host will have emitted a more | |
794 | * detailed message | |
795 | */ | |
796 | error_report("Postcopy is not supported"); | |
797 | s->enabled_capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM] = | |
798 | false; | |
799 | } | |
53dd370c | 800 | } |
00458433 OW |
801 | } |
802 | ||
7f375e04 | 803 | void qmp_migrate_set_parameters(MigrationParameters *params, Error **errp) |
85de8323 LL |
804 | { |
805 | MigrationState *s = migrate_get_current(); | |
806 | ||
7f375e04 EB |
807 | if (params->has_compress_level && |
808 | (params->compress_level < 0 || params->compress_level > 9)) { | |
c6bd8c70 MA |
809 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level", |
810 | "is invalid, it should be in the range of 0 to 9"); | |
85de8323 LL |
811 | return; |
812 | } | |
7f375e04 EB |
813 | if (params->has_compress_threads && |
814 | (params->compress_threads < 1 || params->compress_threads > 255)) { | |
c6bd8c70 MA |
815 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
816 | "compress_threads", | |
817 | "is invalid, it should be in the range of 1 to 255"); | |
85de8323 LL |
818 | return; |
819 | } | |
7f375e04 EB |
820 | if (params->has_decompress_threads && |
821 | (params->decompress_threads < 1 || params->decompress_threads > 255)) { | |
c6bd8c70 MA |
822 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
823 | "decompress_threads", | |
824 | "is invalid, it should be in the range of 1 to 255"); | |
85de8323 LL |
825 | return; |
826 | } | |
7f375e04 EB |
827 | if (params->has_cpu_throttle_initial && |
828 | (params->cpu_throttle_initial < 1 || | |
829 | params->cpu_throttle_initial > 99)) { | |
1626fee3 | 830 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
d85a31d1 | 831 | "cpu_throttle_initial", |
1626fee3 | 832 | "an integer in the range of 1 to 99"); |
091ecc8b | 833 | return; |
1626fee3 | 834 | } |
7f375e04 EB |
835 | if (params->has_cpu_throttle_increment && |
836 | (params->cpu_throttle_increment < 1 || | |
837 | params->cpu_throttle_increment > 99)) { | |
1626fee3 | 838 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
d85a31d1 | 839 | "cpu_throttle_increment", |
1626fee3 | 840 | "an integer in the range of 1 to 99"); |
091ecc8b | 841 | return; |
1626fee3 | 842 | } |
2ff30257 AA |
843 | if (params->has_max_bandwidth && |
844 | (params->max_bandwidth < 0 || params->max_bandwidth > SIZE_MAX)) { | |
845 | error_setg(errp, "Parameter 'max_bandwidth' expects an integer in the" | |
846 | " range of 0 to %zu bytes/second", SIZE_MAX); | |
847 | return; | |
848 | } | |
849 | if (params->has_downtime_limit && | |
850 | (params->downtime_limit < 0 || params->downtime_limit > 2000000)) { | |
851 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
852 | "downtime_limit", | |
853 | "an integer in the range of 0 to 2000000 milliseconds"); | |
854 | return; | |
855 | } | |
68b53591 HZ |
856 | if (params->has_x_checkpoint_delay && (params->x_checkpoint_delay < 0)) { |
857 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
858 | "x_checkpoint_delay", | |
859 | "is invalid, it should be positive"); | |
860 | } | |
85de8323 | 861 | |
7f375e04 EB |
862 | if (params->has_compress_level) { |
863 | s->parameters.compress_level = params->compress_level; | |
85de8323 | 864 | } |
7f375e04 EB |
865 | if (params->has_compress_threads) { |
866 | s->parameters.compress_threads = params->compress_threads; | |
85de8323 | 867 | } |
7f375e04 EB |
868 | if (params->has_decompress_threads) { |
869 | s->parameters.decompress_threads = params->decompress_threads; | |
85de8323 | 870 | } |
7f375e04 EB |
871 | if (params->has_cpu_throttle_initial) { |
872 | s->parameters.cpu_throttle_initial = params->cpu_throttle_initial; | |
1626fee3 | 873 | } |
7f375e04 EB |
874 | if (params->has_cpu_throttle_increment) { |
875 | s->parameters.cpu_throttle_increment = params->cpu_throttle_increment; | |
1626fee3 | 876 | } |
7f375e04 | 877 | if (params->has_tls_creds) { |
69ef1f36 | 878 | g_free(s->parameters.tls_creds); |
7f375e04 | 879 | s->parameters.tls_creds = g_strdup(params->tls_creds); |
69ef1f36 | 880 | } |
7f375e04 | 881 | if (params->has_tls_hostname) { |
69ef1f36 | 882 | g_free(s->parameters.tls_hostname); |
7f375e04 | 883 | s->parameters.tls_hostname = g_strdup(params->tls_hostname); |
69ef1f36 | 884 | } |
2ff30257 AA |
885 | if (params->has_max_bandwidth) { |
886 | s->parameters.max_bandwidth = params->max_bandwidth; | |
887 | if (s->to_dst_file) { | |
888 | qemu_file_set_rate_limit(s->to_dst_file, | |
889 | s->parameters.max_bandwidth / XFER_LIMIT_RATIO); | |
890 | } | |
891 | } | |
892 | if (params->has_downtime_limit) { | |
893 | s->parameters.downtime_limit = params->downtime_limit; | |
894 | } | |
68b53591 HZ |
895 | |
896 | if (params->has_x_checkpoint_delay) { | |
897 | s->parameters.x_checkpoint_delay = params->x_checkpoint_delay; | |
898 | } | |
85de8323 LL |
899 | } |
900 | ||
2594f56d | 901 | |
4886a1bc DDAG |
902 | void qmp_migrate_start_postcopy(Error **errp) |
903 | { | |
904 | MigrationState *s = migrate_get_current(); | |
905 | ||
906 | if (!migrate_postcopy_ram()) { | |
a54d340b | 907 | error_setg(errp, "Enable postcopy with migrate_set_capability before" |
4886a1bc DDAG |
908 | " the start of migration"); |
909 | return; | |
910 | } | |
911 | ||
912 | if (s->state == MIGRATION_STATUS_NONE) { | |
913 | error_setg(errp, "Postcopy must be started after migration has been" | |
914 | " started"); | |
915 | return; | |
916 | } | |
917 | /* | |
918 | * we don't error if migration has finished since that would be racy | |
919 | * with issuing this command. | |
920 | */ | |
921 | atomic_set(&s->start_postcopy, true); | |
922 | } | |
923 | ||
065e2813 AL |
924 | /* shared migration helpers */ |
925 | ||
48781e5b | 926 | void migrate_set_state(int *state, int old_state, int new_state) |
51cf4c1a | 927 | { |
48781e5b | 928 | if (atomic_cmpxchg(state, old_state, new_state) == old_state) { |
4ba4bc5e | 929 | trace_migrate_set_state(new_state); |
b05dc723 | 930 | migrate_generate_event(new_state); |
51cf4c1a Z |
931 | } |
932 | } | |
933 | ||
bb1fadc4 | 934 | static void migrate_fd_cleanup(void *opaque) |
065e2813 | 935 | { |
bb1fadc4 PB |
936 | MigrationState *s = opaque; |
937 | ||
938 | qemu_bh_delete(s->cleanup_bh); | |
939 | s->cleanup_bh = NULL; | |
940 | ||
6c595cde DDAG |
941 | flush_page_queue(s); |
942 | ||
89a02a9f | 943 | if (s->to_dst_file) { |
9013dca5 | 944 | trace_migrate_fd_cleanup(); |
404a7c05 | 945 | qemu_mutex_unlock_iothread(); |
1d34e4bf DDAG |
946 | if (s->migration_thread_running) { |
947 | qemu_thread_join(&s->thread); | |
948 | s->migration_thread_running = false; | |
949 | } | |
404a7c05 PB |
950 | qemu_mutex_lock_iothread(); |
951 | ||
8706d2d5 | 952 | migrate_compress_threads_join(); |
89a02a9f HZ |
953 | qemu_fclose(s->to_dst_file); |
954 | s->to_dst_file = NULL; | |
065e2813 AL |
955 | } |
956 | ||
9ec055ae DDAG |
957 | assert((s->state != MIGRATION_STATUS_ACTIVE) && |
958 | (s->state != MIGRATION_STATUS_POSTCOPY_ACTIVE)); | |
7a2c1721 | 959 | |
94f5a437 | 960 | if (s->state == MIGRATION_STATUS_CANCELLING) { |
48781e5b | 961 | migrate_set_state(&s->state, MIGRATION_STATUS_CANCELLING, |
94f5a437 | 962 | MIGRATION_STATUS_CANCELLED); |
7a2c1721 | 963 | } |
a3fa1d78 PB |
964 | |
965 | notifier_list_notify(&migration_state_notifiers, s); | |
065e2813 AL |
966 | } |
967 | ||
d59ce6f3 | 968 | void migrate_fd_error(MigrationState *s, const Error *error) |
065e2813 | 969 | { |
25174055 | 970 | trace_migrate_fd_error(error_get_pretty(error)); |
89a02a9f | 971 | assert(s->to_dst_file == NULL); |
48781e5b HZ |
972 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
973 | MIGRATION_STATUS_FAILED); | |
d59ce6f3 DB |
974 | if (!s->error) { |
975 | s->error = error_copy(error); | |
976 | } | |
bb1fadc4 | 977 | notifier_list_notify(&migration_state_notifiers, s); |
458cf28e JQ |
978 | } |
979 | ||
0edda1c4 | 980 | static void migrate_fd_cancel(MigrationState *s) |
065e2813 | 981 | { |
6f2b811a | 982 | int old_state ; |
89a02a9f | 983 | QEMUFile *f = migrate_get_current()->to_dst_file; |
9013dca5 | 984 | trace_migrate_fd_cancel(); |
065e2813 | 985 | |
70b20477 DDAG |
986 | if (s->rp_state.from_dst_file) { |
987 | /* shutdown the rp socket, so causing the rp thread to shutdown */ | |
988 | qemu_file_shutdown(s->rp_state.from_dst_file); | |
989 | } | |
990 | ||
6f2b811a Z |
991 | do { |
992 | old_state = s->state; | |
f6844b99 | 993 | if (!migration_is_setup_or_active(old_state)) { |
6f2b811a Z |
994 | break; |
995 | } | |
48781e5b | 996 | migrate_set_state(&s->state, old_state, MIGRATION_STATUS_CANCELLING); |
31194731 | 997 | } while (s->state != MIGRATION_STATUS_CANCELLING); |
a26ba26e DDAG |
998 | |
999 | /* | |
1000 | * If we're unlucky the migration code might be stuck somewhere in a | |
1001 | * send/write while the network has failed and is waiting to timeout; | |
1002 | * if we've got shutdown(2) available then we can force it to quit. | |
1003 | * The outgoing qemu file gets closed in migrate_fd_cleanup that is | |
1004 | * called in a bh, so there is no race against this cancel. | |
1005 | */ | |
31194731 | 1006 | if (s->state == MIGRATION_STATUS_CANCELLING && f) { |
a26ba26e DDAG |
1007 | qemu_file_shutdown(f); |
1008 | } | |
065e2813 AL |
1009 | } |
1010 | ||
99a0db9b GH |
1011 | void add_migration_state_change_notifier(Notifier *notify) |
1012 | { | |
1013 | notifier_list_add(&migration_state_notifiers, notify); | |
1014 | } | |
1015 | ||
1016 | void remove_migration_state_change_notifier(Notifier *notify) | |
1017 | { | |
31552529 | 1018 | notifier_remove(notify); |
99a0db9b GH |
1019 | } |
1020 | ||
02edd2e7 | 1021 | bool migration_in_setup(MigrationState *s) |
afe2df69 | 1022 | { |
31194731 | 1023 | return s->state == MIGRATION_STATUS_SETUP; |
afe2df69 GH |
1024 | } |
1025 | ||
7073693b | 1026 | bool migration_has_finished(MigrationState *s) |
99a0db9b | 1027 | { |
31194731 | 1028 | return s->state == MIGRATION_STATUS_COMPLETED; |
99a0db9b | 1029 | } |
0edda1c4 | 1030 | |
afe2df69 GH |
1031 | bool migration_has_failed(MigrationState *s) |
1032 | { | |
31194731 HZ |
1033 | return (s->state == MIGRATION_STATUS_CANCELLED || |
1034 | s->state == MIGRATION_STATUS_FAILED); | |
afe2df69 GH |
1035 | } |
1036 | ||
9ec055ae DDAG |
1037 | bool migration_in_postcopy(MigrationState *s) |
1038 | { | |
1039 | return (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
1040 | } | |
1041 | ||
b82fc321 DDAG |
1042 | bool migration_in_postcopy_after_devices(MigrationState *s) |
1043 | { | |
1044 | return migration_in_postcopy(s) && s->postcopy_after_devices; | |
1045 | } | |
1046 | ||
aefeb18b | 1047 | MigrationState *migrate_init(const MigrationParams *params) |
0edda1c4 | 1048 | { |
17549e84 | 1049 | MigrationState *s = migrate_get_current(); |
bbf6da32 | 1050 | |
389775d1 DDAG |
1051 | /* |
1052 | * Reinitialise all migration state, except | |
1053 | * parameters/capabilities that the user set, and | |
1054 | * locks. | |
1055 | */ | |
1056 | s->bytes_xfer = 0; | |
1057 | s->xfer_limit = 0; | |
1058 | s->cleanup_bh = 0; | |
89a02a9f | 1059 | s->to_dst_file = NULL; |
389775d1 | 1060 | s->state = MIGRATION_STATUS_NONE; |
6607ae23 | 1061 | s->params = *params; |
389775d1 DDAG |
1062 | s->rp_state.from_dst_file = NULL; |
1063 | s->rp_state.error = false; | |
1064 | s->mbps = 0.0; | |
1065 | s->downtime = 0; | |
1066 | s->expected_downtime = 0; | |
1067 | s->dirty_pages_rate = 0; | |
1068 | s->dirty_bytes_rate = 0; | |
1069 | s->setup_time = 0; | |
1070 | s->dirty_sync_count = 0; | |
1071 | s->start_postcopy = false; | |
b82fc321 | 1072 | s->postcopy_after_devices = false; |
d3bf5418 | 1073 | s->postcopy_requests = 0; |
389775d1 DDAG |
1074 | s->migration_thread_running = false; |
1075 | s->last_req_rb = NULL; | |
d59ce6f3 DB |
1076 | error_free(s->error); |
1077 | s->error = NULL; | |
389775d1 | 1078 | |
48781e5b | 1079 | migrate_set_state(&s->state, MIGRATION_STATUS_NONE, MIGRATION_STATUS_SETUP); |
0edda1c4 | 1080 | |
6c595cde DDAG |
1081 | QSIMPLEQ_INIT(&s->src_page_requests); |
1082 | ||
bc72ad67 | 1083 | s->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0edda1c4 JQ |
1084 | return s; |
1085 | } | |
cab30143 | 1086 | |
fa2756b7 AL |
1087 | static GSList *migration_blockers; |
1088 | ||
1089 | void migrate_add_blocker(Error *reason) | |
1090 | { | |
1091 | migration_blockers = g_slist_prepend(migration_blockers, reason); | |
1092 | } | |
1093 | ||
1094 | void migrate_del_blocker(Error *reason) | |
1095 | { | |
1096 | migration_blockers = g_slist_remove(migration_blockers, reason); | |
1097 | } | |
1098 | ||
bf1ae1f4 DDAG |
1099 | void qmp_migrate_incoming(const char *uri, Error **errp) |
1100 | { | |
1101 | Error *local_err = NULL; | |
4debb5f5 | 1102 | static bool once = true; |
bf1ae1f4 DDAG |
1103 | |
1104 | if (!deferred_incoming) { | |
4debb5f5 | 1105 | error_setg(errp, "For use with '-incoming defer'"); |
bf1ae1f4 DDAG |
1106 | return; |
1107 | } | |
4debb5f5 DDAG |
1108 | if (!once) { |
1109 | error_setg(errp, "The incoming migration has already been started"); | |
1110 | } | |
bf1ae1f4 DDAG |
1111 | |
1112 | qemu_start_incoming_migration(uri, &local_err); | |
1113 | ||
1114 | if (local_err) { | |
1115 | error_propagate(errp, local_err); | |
1116 | return; | |
1117 | } | |
1118 | ||
4debb5f5 | 1119 | once = false; |
bf1ae1f4 DDAG |
1120 | } |
1121 | ||
24f3902b GK |
1122 | bool migration_is_blocked(Error **errp) |
1123 | { | |
1124 | if (qemu_savevm_state_blocked(errp)) { | |
1125 | return true; | |
1126 | } | |
1127 | ||
1128 | if (migration_blockers) { | |
1129 | *errp = error_copy(migration_blockers->data); | |
1130 | return true; | |
1131 | } | |
1132 | ||
1133 | return false; | |
1134 | } | |
1135 | ||
e1c37d0e LC |
1136 | void qmp_migrate(const char *uri, bool has_blk, bool blk, |
1137 | bool has_inc, bool inc, bool has_detach, bool detach, | |
1138 | Error **errp) | |
cab30143 | 1139 | { |
be7059cd | 1140 | Error *local_err = NULL; |
17549e84 | 1141 | MigrationState *s = migrate_get_current(); |
6607ae23 | 1142 | MigrationParams params; |
cab30143 | 1143 | const char *p; |
cab30143 | 1144 | |
8c0426ae PP |
1145 | params.blk = has_blk && blk; |
1146 | params.shared = has_inc && inc; | |
6607ae23 | 1147 | |
f6844b99 | 1148 | if (migration_is_setup_or_active(s->state) || |
0b827d5e HZ |
1149 | s->state == MIGRATION_STATUS_CANCELLING || |
1150 | s->state == MIGRATION_STATUS_COLO) { | |
c6bd8c70 | 1151 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
e1c37d0e | 1152 | return; |
cab30143 | 1153 | } |
ca99993a DDAG |
1154 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
1155 | error_setg(errp, "Guest is waiting for an incoming migration"); | |
1156 | return; | |
1157 | } | |
1158 | ||
24f3902b | 1159 | if (migration_is_blocked(errp)) { |
e1c37d0e | 1160 | return; |
fa2756b7 AL |
1161 | } |
1162 | ||
6607ae23 | 1163 | s = migrate_init(¶ms); |
cab30143 JQ |
1164 | |
1165 | if (strstart(uri, "tcp:", &p)) { | |
f37afb5a | 1166 | tcp_start_outgoing_migration(s, p, &local_err); |
2da776db | 1167 | #ifdef CONFIG_RDMA |
41310c68 | 1168 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
1169 | rdma_start_outgoing_migration(s, p, &local_err); |
1170 | #endif | |
cab30143 | 1171 | } else if (strstart(uri, "exec:", &p)) { |
f37afb5a | 1172 | exec_start_outgoing_migration(s, p, &local_err); |
cab30143 | 1173 | } else if (strstart(uri, "unix:", &p)) { |
f37afb5a | 1174 | unix_start_outgoing_migration(s, p, &local_err); |
cab30143 | 1175 | } else if (strstart(uri, "fd:", &p)) { |
f37afb5a | 1176 | fd_start_outgoing_migration(s, p, &local_err); |
99a0db9b | 1177 | } else { |
c6bd8c70 MA |
1178 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "uri", |
1179 | "a valid migration protocol"); | |
48781e5b HZ |
1180 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
1181 | MIGRATION_STATUS_FAILED); | |
e1c37d0e | 1182 | return; |
cab30143 JQ |
1183 | } |
1184 | ||
f37afb5a | 1185 | if (local_err) { |
d59ce6f3 | 1186 | migrate_fd_error(s, local_err); |
f37afb5a | 1187 | error_propagate(errp, local_err); |
e1c37d0e | 1188 | return; |
1299c631 | 1189 | } |
cab30143 JQ |
1190 | } |
1191 | ||
6cdedb07 | 1192 | void qmp_migrate_cancel(Error **errp) |
cab30143 | 1193 | { |
17549e84 | 1194 | migrate_fd_cancel(migrate_get_current()); |
cab30143 JQ |
1195 | } |
1196 | ||
9e1ba4cc OW |
1197 | void qmp_migrate_set_cache_size(int64_t value, Error **errp) |
1198 | { | |
1199 | MigrationState *s = migrate_get_current(); | |
c91e681a | 1200 | int64_t new_size; |
9e1ba4cc OW |
1201 | |
1202 | /* Check for truncation */ | |
1203 | if (value != (size_t)value) { | |
c6bd8c70 MA |
1204 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
1205 | "exceeding address space"); | |
9e1ba4cc OW |
1206 | return; |
1207 | } | |
1208 | ||
a5615b14 OW |
1209 | /* Cache should not be larger than guest ram size */ |
1210 | if (value > ram_bytes_total()) { | |
c6bd8c70 MA |
1211 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
1212 | "exceeds guest ram size "); | |
a5615b14 OW |
1213 | return; |
1214 | } | |
1215 | ||
c91e681a OW |
1216 | new_size = xbzrle_cache_resize(value); |
1217 | if (new_size < 0) { | |
c6bd8c70 MA |
1218 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "cache size", |
1219 | "is smaller than page size"); | |
c91e681a OW |
1220 | return; |
1221 | } | |
1222 | ||
1223 | s->xbzrle_cache_size = new_size; | |
9e1ba4cc OW |
1224 | } |
1225 | ||
1226 | int64_t qmp_query_migrate_cache_size(Error **errp) | |
1227 | { | |
1228 | return migrate_xbzrle_cache_size(); | |
1229 | } | |
1230 | ||
3dc85383 | 1231 | void qmp_migrate_set_speed(int64_t value, Error **errp) |
cab30143 | 1232 | { |
2ff30257 AA |
1233 | MigrationParameters p = { |
1234 | .has_max_bandwidth = true, | |
1235 | .max_bandwidth = value, | |
1236 | }; | |
cab30143 | 1237 | |
2ff30257 | 1238 | qmp_migrate_set_parameters(&p, errp); |
cab30143 JQ |
1239 | } |
1240 | ||
4f0a993b | 1241 | void qmp_migrate_set_downtime(double value, Error **errp) |
cab30143 | 1242 | { |
2ff30257 AA |
1243 | value *= 1000; /* Convert to milliseconds */ |
1244 | value = MAX(0, MIN(INT64_MAX, value)); | |
1245 | ||
1246 | MigrationParameters p = { | |
1247 | .has_downtime_limit = true, | |
1248 | .downtime_limit = value, | |
1249 | }; | |
1250 | ||
1251 | qmp_migrate_set_parameters(&p, errp); | |
99a0db9b | 1252 | } |
17ad9b35 | 1253 | |
53dd370c DDAG |
1254 | bool migrate_postcopy_ram(void) |
1255 | { | |
1256 | MigrationState *s; | |
1257 | ||
1258 | s = migrate_get_current(); | |
1259 | ||
32c3db5b | 1260 | return s->enabled_capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM]; |
53dd370c DDAG |
1261 | } |
1262 | ||
bde1e2ec CV |
1263 | bool migrate_auto_converge(void) |
1264 | { | |
1265 | MigrationState *s; | |
1266 | ||
1267 | s = migrate_get_current(); | |
1268 | ||
1269 | return s->enabled_capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; | |
1270 | } | |
1271 | ||
323004a3 PL |
1272 | bool migrate_zero_blocks(void) |
1273 | { | |
1274 | MigrationState *s; | |
1275 | ||
1276 | s = migrate_get_current(); | |
1277 | ||
1278 | return s->enabled_capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS]; | |
1279 | } | |
1280 | ||
8706d2d5 LL |
1281 | bool migrate_use_compression(void) |
1282 | { | |
dde4e694 LL |
1283 | MigrationState *s; |
1284 | ||
1285 | s = migrate_get_current(); | |
1286 | ||
1287 | return s->enabled_capabilities[MIGRATION_CAPABILITY_COMPRESS]; | |
8706d2d5 LL |
1288 | } |
1289 | ||
1290 | int migrate_compress_level(void) | |
1291 | { | |
1292 | MigrationState *s; | |
1293 | ||
1294 | s = migrate_get_current(); | |
1295 | ||
2594f56d | 1296 | return s->parameters.compress_level; |
8706d2d5 LL |
1297 | } |
1298 | ||
1299 | int migrate_compress_threads(void) | |
1300 | { | |
1301 | MigrationState *s; | |
1302 | ||
1303 | s = migrate_get_current(); | |
1304 | ||
2594f56d | 1305 | return s->parameters.compress_threads; |
8706d2d5 LL |
1306 | } |
1307 | ||
3fcb38c2 LL |
1308 | int migrate_decompress_threads(void) |
1309 | { | |
1310 | MigrationState *s; | |
1311 | ||
1312 | s = migrate_get_current(); | |
1313 | ||
2594f56d | 1314 | return s->parameters.decompress_threads; |
3fcb38c2 LL |
1315 | } |
1316 | ||
b05dc723 JQ |
1317 | bool migrate_use_events(void) |
1318 | { | |
1319 | MigrationState *s; | |
1320 | ||
1321 | s = migrate_get_current(); | |
1322 | ||
1323 | return s->enabled_capabilities[MIGRATION_CAPABILITY_EVENTS]; | |
1324 | } | |
1325 | ||
17ad9b35 OW |
1326 | int migrate_use_xbzrle(void) |
1327 | { | |
1328 | MigrationState *s; | |
1329 | ||
1330 | s = migrate_get_current(); | |
1331 | ||
1332 | return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE]; | |
1333 | } | |
1334 | ||
1335 | int64_t migrate_xbzrle_cache_size(void) | |
1336 | { | |
1337 | MigrationState *s; | |
1338 | ||
1339 | s = migrate_get_current(); | |
1340 | ||
1341 | return s->xbzrle_cache_size; | |
1342 | } | |
0d82d0e8 | 1343 | |
70b20477 DDAG |
1344 | /* migration thread support */ |
1345 | /* | |
1346 | * Something bad happened to the RP stream, mark an error | |
1347 | * The caller shall print or trace something to indicate why | |
1348 | */ | |
1349 | static void mark_source_rp_bad(MigrationState *s) | |
1350 | { | |
1351 | s->rp_state.error = true; | |
1352 | } | |
1353 | ||
1354 | static struct rp_cmd_args { | |
1355 | ssize_t len; /* -1 = variable */ | |
1356 | const char *name; | |
1357 | } rp_cmd_args[] = { | |
1358 | [MIG_RP_MSG_INVALID] = { .len = -1, .name = "INVALID" }, | |
1359 | [MIG_RP_MSG_SHUT] = { .len = 4, .name = "SHUT" }, | |
1360 | [MIG_RP_MSG_PONG] = { .len = 4, .name = "PONG" }, | |
1e2d90eb DDAG |
1361 | [MIG_RP_MSG_REQ_PAGES] = { .len = 12, .name = "REQ_PAGES" }, |
1362 | [MIG_RP_MSG_REQ_PAGES_ID] = { .len = -1, .name = "REQ_PAGES_ID" }, | |
70b20477 DDAG |
1363 | [MIG_RP_MSG_MAX] = { .len = -1, .name = "MAX" }, |
1364 | }; | |
1365 | ||
1e2d90eb DDAG |
1366 | /* |
1367 | * Process a request for pages received on the return path, | |
1368 | * We're allowed to send more than requested (e.g. to round to our page size) | |
1369 | * and we don't need to send pages that have already been sent. | |
1370 | */ | |
1371 | static void migrate_handle_rp_req_pages(MigrationState *ms, const char* rbname, | |
1372 | ram_addr_t start, size_t len) | |
1373 | { | |
6c595cde DDAG |
1374 | long our_host_ps = getpagesize(); |
1375 | ||
1e2d90eb | 1376 | trace_migrate_handle_rp_req_pages(rbname, start, len); |
6c595cde DDAG |
1377 | |
1378 | /* | |
1379 | * Since we currently insist on matching page sizes, just sanity check | |
1380 | * we're being asked for whole host pages. | |
1381 | */ | |
1382 | if (start & (our_host_ps-1) || | |
1383 | (len & (our_host_ps-1))) { | |
1384 | error_report("%s: Misaligned page request, start: " RAM_ADDR_FMT | |
1385 | " len: %zd", __func__, start, len); | |
1386 | mark_source_rp_bad(ms); | |
1387 | return; | |
1388 | } | |
1389 | ||
1390 | if (ram_save_queue_pages(ms, rbname, start, len)) { | |
1391 | mark_source_rp_bad(ms); | |
1392 | } | |
1e2d90eb DDAG |
1393 | } |
1394 | ||
70b20477 DDAG |
1395 | /* |
1396 | * Handles messages sent on the return path towards the source VM | |
1397 | * | |
1398 | */ | |
1399 | static void *source_return_path_thread(void *opaque) | |
1400 | { | |
1401 | MigrationState *ms = opaque; | |
1402 | QEMUFile *rp = ms->rp_state.from_dst_file; | |
1403 | uint16_t header_len, header_type; | |
568b01ca | 1404 | uint8_t buf[512]; |
70b20477 | 1405 | uint32_t tmp32, sibling_error; |
1e2d90eb DDAG |
1406 | ram_addr_t start = 0; /* =0 to silence warning */ |
1407 | size_t len = 0, expected_len; | |
70b20477 DDAG |
1408 | int res; |
1409 | ||
1410 | trace_source_return_path_thread_entry(); | |
1411 | while (!ms->rp_state.error && !qemu_file_get_error(rp) && | |
1412 | migration_is_setup_or_active(ms->state)) { | |
1413 | trace_source_return_path_thread_loop_top(); | |
1414 | header_type = qemu_get_be16(rp); | |
1415 | header_len = qemu_get_be16(rp); | |
1416 | ||
1417 | if (header_type >= MIG_RP_MSG_MAX || | |
1418 | header_type == MIG_RP_MSG_INVALID) { | |
1419 | error_report("RP: Received invalid message 0x%04x length 0x%04x", | |
1420 | header_type, header_len); | |
1421 | mark_source_rp_bad(ms); | |
1422 | goto out; | |
1423 | } | |
1424 | ||
1425 | if ((rp_cmd_args[header_type].len != -1 && | |
1426 | header_len != rp_cmd_args[header_type].len) || | |
568b01ca | 1427 | header_len > sizeof(buf)) { |
70b20477 DDAG |
1428 | error_report("RP: Received '%s' message (0x%04x) with" |
1429 | "incorrect length %d expecting %zu", | |
1430 | rp_cmd_args[header_type].name, header_type, header_len, | |
1431 | (size_t)rp_cmd_args[header_type].len); | |
1432 | mark_source_rp_bad(ms); | |
1433 | goto out; | |
1434 | } | |
1435 | ||
1436 | /* We know we've got a valid header by this point */ | |
1437 | res = qemu_get_buffer(rp, buf, header_len); | |
1438 | if (res != header_len) { | |
1439 | error_report("RP: Failed reading data for message 0x%04x" | |
1440 | " read %d expected %d", | |
1441 | header_type, res, header_len); | |
1442 | mark_source_rp_bad(ms); | |
1443 | goto out; | |
1444 | } | |
1445 | ||
1446 | /* OK, we have the message and the data */ | |
1447 | switch (header_type) { | |
1448 | case MIG_RP_MSG_SHUT: | |
4d885131 | 1449 | sibling_error = ldl_be_p(buf); |
70b20477 DDAG |
1450 | trace_source_return_path_thread_shut(sibling_error); |
1451 | if (sibling_error) { | |
1452 | error_report("RP: Sibling indicated error %d", sibling_error); | |
1453 | mark_source_rp_bad(ms); | |
1454 | } | |
1455 | /* | |
1456 | * We'll let the main thread deal with closing the RP | |
1457 | * we could do a shutdown(2) on it, but we're the only user | |
1458 | * anyway, so there's nothing gained. | |
1459 | */ | |
1460 | goto out; | |
1461 | ||
1462 | case MIG_RP_MSG_PONG: | |
4d885131 | 1463 | tmp32 = ldl_be_p(buf); |
70b20477 DDAG |
1464 | trace_source_return_path_thread_pong(tmp32); |
1465 | break; | |
1466 | ||
1e2d90eb | 1467 | case MIG_RP_MSG_REQ_PAGES: |
4d885131 PM |
1468 | start = ldq_be_p(buf); |
1469 | len = ldl_be_p(buf + 8); | |
1e2d90eb DDAG |
1470 | migrate_handle_rp_req_pages(ms, NULL, start, len); |
1471 | break; | |
1472 | ||
1473 | case MIG_RP_MSG_REQ_PAGES_ID: | |
1474 | expected_len = 12 + 1; /* header + termination */ | |
1475 | ||
1476 | if (header_len >= expected_len) { | |
4d885131 PM |
1477 | start = ldq_be_p(buf); |
1478 | len = ldl_be_p(buf + 8); | |
1e2d90eb DDAG |
1479 | /* Now we expect an idstr */ |
1480 | tmp32 = buf[12]; /* Length of the following idstr */ | |
1481 | buf[13 + tmp32] = '\0'; | |
1482 | expected_len += tmp32; | |
1483 | } | |
1484 | if (header_len != expected_len) { | |
1485 | error_report("RP: Req_Page_id with length %d expecting %zd", | |
1486 | header_len, expected_len); | |
1487 | mark_source_rp_bad(ms); | |
1488 | goto out; | |
1489 | } | |
1490 | migrate_handle_rp_req_pages(ms, (char *)&buf[13], start, len); | |
1491 | break; | |
1492 | ||
70b20477 DDAG |
1493 | default: |
1494 | break; | |
1495 | } | |
1496 | } | |
5df5416e | 1497 | if (qemu_file_get_error(rp)) { |
70b20477 DDAG |
1498 | trace_source_return_path_thread_bad_end(); |
1499 | mark_source_rp_bad(ms); | |
1500 | } | |
1501 | ||
1502 | trace_source_return_path_thread_end(); | |
1503 | out: | |
1504 | ms->rp_state.from_dst_file = NULL; | |
1505 | qemu_fclose(rp); | |
1506 | return NULL; | |
1507 | } | |
1508 | ||
70b20477 DDAG |
1509 | static int open_return_path_on_source(MigrationState *ms) |
1510 | { | |
1511 | ||
89a02a9f | 1512 | ms->rp_state.from_dst_file = qemu_file_get_return_path(ms->to_dst_file); |
70b20477 DDAG |
1513 | if (!ms->rp_state.from_dst_file) { |
1514 | return -1; | |
1515 | } | |
1516 | ||
1517 | trace_open_return_path_on_source(); | |
1518 | qemu_thread_create(&ms->rp_state.rp_thread, "return path", | |
1519 | source_return_path_thread, ms, QEMU_THREAD_JOINABLE); | |
1520 | ||
1521 | trace_open_return_path_on_source_continue(); | |
1522 | ||
1523 | return 0; | |
1524 | } | |
1525 | ||
70b20477 DDAG |
1526 | /* Returns 0 if the RP was ok, otherwise there was an error on the RP */ |
1527 | static int await_return_path_close_on_source(MigrationState *ms) | |
1528 | { | |
1529 | /* | |
1530 | * If this is a normal exit then the destination will send a SHUT and the | |
1531 | * rp_thread will exit, however if there's an error we need to cause | |
1532 | * it to exit. | |
1533 | */ | |
89a02a9f | 1534 | if (qemu_file_get_error(ms->to_dst_file) && ms->rp_state.from_dst_file) { |
70b20477 DDAG |
1535 | /* |
1536 | * shutdown(2), if we have it, will cause it to unblock if it's stuck | |
1537 | * waiting for the destination. | |
1538 | */ | |
1539 | qemu_file_shutdown(ms->rp_state.from_dst_file); | |
1540 | mark_source_rp_bad(ms); | |
1541 | } | |
1542 | trace_await_return_path_close_on_source_joining(); | |
1543 | qemu_thread_join(&ms->rp_state.rp_thread); | |
1544 | trace_await_return_path_close_on_source_close(); | |
1545 | return ms->rp_state.error; | |
1546 | } | |
1547 | ||
1d34e4bf DDAG |
1548 | /* |
1549 | * Switch from normal iteration to postcopy | |
1550 | * Returns non-0 on error | |
1551 | */ | |
1552 | static int postcopy_start(MigrationState *ms, bool *old_vm_running) | |
1553 | { | |
1554 | int ret; | |
61b67d47 DB |
1555 | QIOChannelBuffer *bioc; |
1556 | QEMUFile *fb; | |
1d34e4bf | 1557 | int64_t time_at_stop = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
48781e5b | 1558 | migrate_set_state(&ms->state, MIGRATION_STATUS_ACTIVE, |
1d34e4bf DDAG |
1559 | MIGRATION_STATUS_POSTCOPY_ACTIVE); |
1560 | ||
1561 | trace_postcopy_start(); | |
1562 | qemu_mutex_lock_iothread(); | |
1563 | trace_postcopy_start_set_run(); | |
1564 | ||
1565 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER); | |
1566 | *old_vm_running = runstate_is_running(); | |
1567 | global_state_store(); | |
1568 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); | |
76b1c7fe KW |
1569 | if (ret < 0) { |
1570 | goto fail; | |
1571 | } | |
1d34e4bf | 1572 | |
76b1c7fe | 1573 | ret = bdrv_inactivate_all(); |
1d34e4bf DDAG |
1574 | if (ret < 0) { |
1575 | goto fail; | |
1576 | } | |
1577 | ||
1c0d249d DDAG |
1578 | /* |
1579 | * Cause any non-postcopiable, but iterative devices to | |
1580 | * send out their final data. | |
1581 | */ | |
89a02a9f | 1582 | qemu_savevm_state_complete_precopy(ms->to_dst_file, true); |
1c0d249d | 1583 | |
1d34e4bf DDAG |
1584 | /* |
1585 | * in Finish migrate and with the io-lock held everything should | |
1586 | * be quiet, but we've potentially still got dirty pages and we | |
1587 | * need to tell the destination to throw any pages it's already received | |
1588 | * that are dirty | |
1589 | */ | |
1590 | if (ram_postcopy_send_discard_bitmap(ms)) { | |
1591 | error_report("postcopy send discard bitmap failed"); | |
1592 | goto fail; | |
1593 | } | |
1594 | ||
1595 | /* | |
1596 | * send rest of state - note things that are doing postcopy | |
1597 | * will notice we're in POSTCOPY_ACTIVE and not actually | |
1598 | * wrap their state up here | |
1599 | */ | |
89a02a9f | 1600 | qemu_file_set_rate_limit(ms->to_dst_file, INT64_MAX); |
1d34e4bf | 1601 | /* Ping just for debugging, helps line traces up */ |
89a02a9f | 1602 | qemu_savevm_send_ping(ms->to_dst_file, 2); |
1d34e4bf DDAG |
1603 | |
1604 | /* | |
1605 | * While loading the device state we may trigger page transfer | |
1606 | * requests and the fd must be free to process those, and thus | |
1607 | * the destination must read the whole device state off the fd before | |
1608 | * it starts processing it. Unfortunately the ad-hoc migration format | |
1609 | * doesn't allow the destination to know the size to read without fully | |
1610 | * parsing it through each devices load-state code (especially the open | |
1611 | * coded devices that use get/put). | |
1612 | * So we wrap the device state up in a package with a length at the start; | |
1613 | * to do this we use a qemu_buf to hold the whole of the device state. | |
1614 | */ | |
61b67d47 | 1615 | bioc = qio_channel_buffer_new(4096); |
6f01f136 | 1616 | qio_channel_set_name(QIO_CHANNEL(bioc), "migration-postcopy-buffer"); |
61b67d47 DB |
1617 | fb = qemu_fopen_channel_output(QIO_CHANNEL(bioc)); |
1618 | object_unref(OBJECT(bioc)); | |
1d34e4bf | 1619 | |
c76201ab DDAG |
1620 | /* |
1621 | * Make sure the receiver can get incoming pages before we send the rest | |
1622 | * of the state | |
1623 | */ | |
1624 | qemu_savevm_send_postcopy_listen(fb); | |
1625 | ||
1c0d249d | 1626 | qemu_savevm_state_complete_precopy(fb, false); |
1d34e4bf DDAG |
1627 | qemu_savevm_send_ping(fb, 3); |
1628 | ||
1629 | qemu_savevm_send_postcopy_run(fb); | |
1630 | ||
1631 | /* <><> end of stuff going into the package */ | |
1d34e4bf DDAG |
1632 | |
1633 | /* Now send that blob */ | |
61b67d47 | 1634 | if (qemu_savevm_send_packaged(ms->to_dst_file, bioc->data, bioc->usage)) { |
1d34e4bf DDAG |
1635 | goto fail_closefb; |
1636 | } | |
1637 | qemu_fclose(fb); | |
b82fc321 DDAG |
1638 | |
1639 | /* Send a notify to give a chance for anything that needs to happen | |
1640 | * at the transition to postcopy and after the device state; in particular | |
1641 | * spice needs to trigger a transition now | |
1642 | */ | |
1643 | ms->postcopy_after_devices = true; | |
1644 | notifier_list_notify(&migration_state_notifiers, ms); | |
1645 | ||
1d34e4bf DDAG |
1646 | ms->downtime = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) - time_at_stop; |
1647 | ||
1648 | qemu_mutex_unlock_iothread(); | |
1649 | ||
1650 | /* | |
1651 | * Although this ping is just for debug, it could potentially be | |
1652 | * used for getting a better measurement of downtime at the source. | |
1653 | */ | |
89a02a9f | 1654 | qemu_savevm_send_ping(ms->to_dst_file, 4); |
1d34e4bf | 1655 | |
89a02a9f | 1656 | ret = qemu_file_get_error(ms->to_dst_file); |
1d34e4bf DDAG |
1657 | if (ret) { |
1658 | error_report("postcopy_start: Migration stream errored"); | |
48781e5b | 1659 | migrate_set_state(&ms->state, MIGRATION_STATUS_POSTCOPY_ACTIVE, |
1d34e4bf DDAG |
1660 | MIGRATION_STATUS_FAILED); |
1661 | } | |
1662 | ||
1663 | return ret; | |
1664 | ||
1665 | fail_closefb: | |
1666 | qemu_fclose(fb); | |
1667 | fail: | |
48781e5b | 1668 | migrate_set_state(&ms->state, MIGRATION_STATUS_POSTCOPY_ACTIVE, |
1d34e4bf DDAG |
1669 | MIGRATION_STATUS_FAILED); |
1670 | qemu_mutex_unlock_iothread(); | |
1671 | return -1; | |
1672 | } | |
1673 | ||
09f6c85e DDAG |
1674 | /** |
1675 | * migration_completion: Used by migration_thread when there's not much left. | |
1676 | * The caller 'breaks' the loop when this returns. | |
1677 | * | |
1678 | * @s: Current migration state | |
36f48567 | 1679 | * @current_active_state: The migration state we expect to be in |
09f6c85e DDAG |
1680 | * @*old_vm_running: Pointer to old_vm_running flag |
1681 | * @*start_time: Pointer to time to update | |
1682 | */ | |
36f48567 DDAG |
1683 | static void migration_completion(MigrationState *s, int current_active_state, |
1684 | bool *old_vm_running, | |
09f6c85e DDAG |
1685 | int64_t *start_time) |
1686 | { | |
1687 | int ret; | |
1688 | ||
b10ac0c4 DDAG |
1689 | if (s->state == MIGRATION_STATUS_ACTIVE) { |
1690 | qemu_mutex_lock_iothread(); | |
1691 | *start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); | |
1692 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER); | |
1693 | *old_vm_running = runstate_is_running(); | |
1694 | ret = global_state_store(); | |
1695 | ||
1696 | if (!ret) { | |
1697 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); | |
0b827d5e HZ |
1698 | /* |
1699 | * Don't mark the image with BDRV_O_INACTIVE flag if | |
1700 | * we will go into COLO stage later. | |
1701 | */ | |
1702 | if (ret >= 0 && !migrate_colo_enabled()) { | |
76b1c7fe KW |
1703 | ret = bdrv_inactivate_all(); |
1704 | } | |
b10ac0c4 | 1705 | if (ret >= 0) { |
89a02a9f HZ |
1706 | qemu_file_set_rate_limit(s->to_dst_file, INT64_MAX); |
1707 | qemu_savevm_state_complete_precopy(s->to_dst_file, false); | |
b10ac0c4 DDAG |
1708 | } |
1709 | } | |
1710 | qemu_mutex_unlock_iothread(); | |
09f6c85e | 1711 | |
b10ac0c4 DDAG |
1712 | if (ret < 0) { |
1713 | goto fail; | |
09f6c85e | 1714 | } |
b10ac0c4 DDAG |
1715 | } else if (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { |
1716 | trace_migration_completion_postcopy_end(); | |
1717 | ||
89a02a9f | 1718 | qemu_savevm_state_complete_postcopy(s->to_dst_file); |
b10ac0c4 | 1719 | trace_migration_completion_postcopy_end_after_complete(); |
09f6c85e | 1720 | } |
09f6c85e | 1721 | |
b10ac0c4 DDAG |
1722 | /* |
1723 | * If rp was opened we must clean up the thread before | |
1724 | * cleaning everything else up (since if there are no failures | |
1725 | * it will wait for the destination to send it's status in | |
1726 | * a SHUT command). | |
1727 | * Postcopy opens rp if enabled (even if it's not avtivated) | |
1728 | */ | |
1729 | if (migrate_postcopy_ram()) { | |
1730 | int rp_error; | |
1731 | trace_migration_completion_postcopy_end_before_rp(); | |
1732 | rp_error = await_return_path_close_on_source(s); | |
1733 | trace_migration_completion_postcopy_end_after_rp(rp_error); | |
1734 | if (rp_error) { | |
fe904ea8 | 1735 | goto fail_invalidate; |
b10ac0c4 | 1736 | } |
09f6c85e DDAG |
1737 | } |
1738 | ||
89a02a9f | 1739 | if (qemu_file_get_error(s->to_dst_file)) { |
09f6c85e | 1740 | trace_migration_completion_file_err(); |
fe904ea8 | 1741 | goto fail_invalidate; |
09f6c85e DDAG |
1742 | } |
1743 | ||
0b827d5e HZ |
1744 | if (!migrate_colo_enabled()) { |
1745 | migrate_set_state(&s->state, current_active_state, | |
1746 | MIGRATION_STATUS_COMPLETED); | |
1747 | } | |
1748 | ||
09f6c85e DDAG |
1749 | return; |
1750 | ||
fe904ea8 GK |
1751 | fail_invalidate: |
1752 | /* If not doing postcopy, vm_start() will be called: let's regain | |
1753 | * control on images. | |
1754 | */ | |
1755 | if (s->state == MIGRATION_STATUS_ACTIVE) { | |
1756 | Error *local_err = NULL; | |
1757 | ||
1758 | bdrv_invalidate_cache_all(&local_err); | |
1759 | if (local_err) { | |
1760 | error_report_err(local_err); | |
1761 | } | |
1762 | } | |
1763 | ||
09f6c85e | 1764 | fail: |
48781e5b HZ |
1765 | migrate_set_state(&s->state, current_active_state, |
1766 | MIGRATION_STATUS_FAILED); | |
09f6c85e DDAG |
1767 | } |
1768 | ||
35a6ed4f HZ |
1769 | bool migrate_colo_enabled(void) |
1770 | { | |
1771 | MigrationState *s = migrate_get_current(); | |
1772 | return s->enabled_capabilities[MIGRATION_CAPABILITY_X_COLO]; | |
1773 | } | |
1774 | ||
70b20477 DDAG |
1775 | /* |
1776 | * Master migration thread on the source VM. | |
1777 | * It drives the migration and pumps the data down the outgoing channel. | |
1778 | */ | |
5f496a1b | 1779 | static void *migration_thread(void *opaque) |
0d82d0e8 | 1780 | { |
9848a404 | 1781 | MigrationState *s = opaque; |
1d34e4bf | 1782 | /* Used by the bandwidth calcs, updated later */ |
bc72ad67 AB |
1783 | int64_t initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
1784 | int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST); | |
be7172e2 | 1785 | int64_t initial_bytes = 0; |
0d82d0e8 | 1786 | int64_t max_size = 0; |
a3fa1d78 | 1787 | int64_t start_time = initial_time; |
94f5a437 | 1788 | int64_t end_time; |
a3fa1d78 | 1789 | bool old_vm_running = false; |
1d34e4bf DDAG |
1790 | bool entered_postcopy = false; |
1791 | /* The active state we expect to be in; ACTIVE or POSTCOPY_ACTIVE */ | |
1792 | enum MigrationStatus current_active_state = MIGRATION_STATUS_ACTIVE; | |
0b827d5e | 1793 | bool enable_colo = migrate_colo_enabled(); |
76f5933a | 1794 | |
ab28bd23 PB |
1795 | rcu_register_thread(); |
1796 | ||
89a02a9f | 1797 | qemu_savevm_state_header(s->to_dst_file); |
1d34e4bf DDAG |
1798 | |
1799 | if (migrate_postcopy_ram()) { | |
1800 | /* Now tell the dest that it should open its end so it can reply */ | |
89a02a9f | 1801 | qemu_savevm_send_open_return_path(s->to_dst_file); |
1d34e4bf DDAG |
1802 | |
1803 | /* And do a ping that will make stuff easier to debug */ | |
89a02a9f | 1804 | qemu_savevm_send_ping(s->to_dst_file, 1); |
1d34e4bf DDAG |
1805 | |
1806 | /* | |
1807 | * Tell the destination that we *might* want to do postcopy later; | |
1808 | * if the other end can't do postcopy it should fail now, nice and | |
1809 | * early. | |
1810 | */ | |
89a02a9f | 1811 | qemu_savevm_send_postcopy_advise(s->to_dst_file); |
1d34e4bf DDAG |
1812 | } |
1813 | ||
89a02a9f | 1814 | qemu_savevm_state_begin(s->to_dst_file, &s->params); |
0d82d0e8 | 1815 | |
bc72ad67 | 1816 | s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start; |
1d34e4bf | 1817 | current_active_state = MIGRATION_STATUS_ACTIVE; |
48781e5b HZ |
1818 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
1819 | MIGRATION_STATUS_ACTIVE); | |
29ae8a41 | 1820 | |
9ec055ae DDAG |
1821 | trace_migration_thread_setup_complete(); |
1822 | ||
1823 | while (s->state == MIGRATION_STATUS_ACTIVE || | |
1824 | s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { | |
a3e879cd | 1825 | int64_t current_time; |
c369f40d | 1826 | uint64_t pending_size; |
0d82d0e8 | 1827 | |
89a02a9f | 1828 | if (!qemu_file_rate_limit(s->to_dst_file)) { |
c31b098f DDAG |
1829 | uint64_t pend_post, pend_nonpost; |
1830 | ||
89a02a9f | 1831 | qemu_savevm_state_pending(s->to_dst_file, max_size, &pend_nonpost, |
c31b098f DDAG |
1832 | &pend_post); |
1833 | pending_size = pend_nonpost + pend_post; | |
1834 | trace_migrate_pending(pending_size, max_size, | |
1835 | pend_post, pend_nonpost); | |
b22ff1fb | 1836 | if (pending_size && pending_size >= max_size) { |
1d34e4bf DDAG |
1837 | /* Still a significant amount to transfer */ |
1838 | ||
1d34e4bf DDAG |
1839 | if (migrate_postcopy_ram() && |
1840 | s->state != MIGRATION_STATUS_POSTCOPY_ACTIVE && | |
1841 | pend_nonpost <= max_size && | |
1842 | atomic_read(&s->start_postcopy)) { | |
1843 | ||
1844 | if (!postcopy_start(s, &old_vm_running)) { | |
1845 | current_active_state = MIGRATION_STATUS_POSTCOPY_ACTIVE; | |
1846 | entered_postcopy = true; | |
1847 | } | |
1848 | ||
1849 | continue; | |
1850 | } | |
1851 | /* Just another iteration step */ | |
89a02a9f | 1852 | qemu_savevm_state_iterate(s->to_dst_file, entered_postcopy); |
c369f40d | 1853 | } else { |
09f6c85e | 1854 | trace_migration_thread_low_pending(pending_size); |
1d34e4bf | 1855 | migration_completion(s, current_active_state, |
36f48567 | 1856 | &old_vm_running, &start_time); |
09f6c85e | 1857 | break; |
c369f40d JQ |
1858 | } |
1859 | } | |
f4410a5d | 1860 | |
89a02a9f | 1861 | if (qemu_file_get_error(s->to_dst_file)) { |
48781e5b HZ |
1862 | migrate_set_state(&s->state, current_active_state, |
1863 | MIGRATION_STATUS_FAILED); | |
1d34e4bf | 1864 | trace_migration_thread_file_err(); |
fd45ee2c PB |
1865 | break; |
1866 | } | |
bc72ad67 | 1867 | current_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0d82d0e8 | 1868 | if (current_time >= initial_time + BUFFER_DELAY) { |
89a02a9f HZ |
1869 | uint64_t transferred_bytes = qemu_ftell(s->to_dst_file) - |
1870 | initial_bytes; | |
77417f10 | 1871 | uint64_t time_spent = current_time - initial_time; |
a694ee34 | 1872 | double bandwidth = (double)transferred_bytes / time_spent; |
2ff30257 | 1873 | max_size = bandwidth * s->parameters.downtime_limit; |
0d82d0e8 | 1874 | |
5b648de0 WY |
1875 | s->mbps = (((double) transferred_bytes * 8.0) / |
1876 | ((double) time_spent / 1000.0)) / 1000.0 / 1000.0; | |
7e114f8c | 1877 | |
9013dca5 AK |
1878 | trace_migrate_transferred(transferred_bytes, time_spent, |
1879 | bandwidth, max_size); | |
90f8ae72 JQ |
1880 | /* if we haven't sent anything, we don't want to recalculate |
1881 | 10000 is a small enough number for our purposes */ | |
1882 | if (s->dirty_bytes_rate && transferred_bytes > 10000) { | |
1883 | s->expected_downtime = s->dirty_bytes_rate / bandwidth; | |
1884 | } | |
0d82d0e8 | 1885 | |
89a02a9f | 1886 | qemu_file_reset_rate_limit(s->to_dst_file); |
0d82d0e8 | 1887 | initial_time = current_time; |
89a02a9f | 1888 | initial_bytes = qemu_ftell(s->to_dst_file); |
0d82d0e8 | 1889 | } |
89a02a9f | 1890 | if (qemu_file_rate_limit(s->to_dst_file)) { |
0d82d0e8 JQ |
1891 | /* usleep expects microseconds */ |
1892 | g_usleep((initial_time + BUFFER_DELAY - current_time)*1000); | |
1893 | } | |
a3fa1d78 PB |
1894 | } |
1895 | ||
1d34e4bf | 1896 | trace_migration_thread_after_loop(); |
070afca2 JH |
1897 | /* If we enabled cpu throttling for auto-converge, turn it off. */ |
1898 | cpu_throttle_stop(); | |
94f5a437 | 1899 | end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
070afca2 | 1900 | |
f4410a5d | 1901 | qemu_mutex_lock_iothread(); |
0b827d5e HZ |
1902 | /* |
1903 | * The resource has been allocated by migration will be reused in COLO | |
1904 | * process, so don't release them. | |
1905 | */ | |
1906 | if (!enable_colo) { | |
1907 | qemu_savevm_state_cleanup(); | |
1908 | } | |
31194731 | 1909 | if (s->state == MIGRATION_STATUS_COMPLETED) { |
89a02a9f | 1910 | uint64_t transferred_bytes = qemu_ftell(s->to_dst_file); |
a3fa1d78 | 1911 | s->total_time = end_time - s->total_time; |
1d34e4bf DDAG |
1912 | if (!entered_postcopy) { |
1913 | s->downtime = end_time - start_time; | |
1914 | } | |
d6ed7312 PL |
1915 | if (s->total_time) { |
1916 | s->mbps = (((double) transferred_bytes * 8.0) / | |
1917 | ((double) s->total_time)) / 1000; | |
1918 | } | |
a3fa1d78 PB |
1919 | runstate_set(RUN_STATE_POSTMIGRATE); |
1920 | } else { | |
0b827d5e HZ |
1921 | if (s->state == MIGRATION_STATUS_ACTIVE && enable_colo) { |
1922 | migrate_start_colo_process(s); | |
1923 | qemu_savevm_state_cleanup(); | |
1924 | /* | |
1925 | * Fixme: we will run VM in COLO no matter its old running state. | |
1926 | * After exited COLO, we will keep running. | |
1927 | */ | |
1928 | old_vm_running = true; | |
1929 | } | |
1d34e4bf | 1930 | if (old_vm_running && !entered_postcopy) { |
a3fa1d78 | 1931 | vm_start(); |
42da5550 DDAG |
1932 | } else { |
1933 | if (runstate_check(RUN_STATE_FINISH_MIGRATE)) { | |
1934 | runstate_set(RUN_STATE_POSTMIGRATE); | |
1935 | } | |
dba433c0 | 1936 | } |
0d82d0e8 | 1937 | } |
bb1fadc4 | 1938 | qemu_bh_schedule(s->cleanup_bh); |
dba433c0 | 1939 | qemu_mutex_unlock_iothread(); |
f4410a5d | 1940 | |
ab28bd23 | 1941 | rcu_unregister_thread(); |
0d82d0e8 JQ |
1942 | return NULL; |
1943 | } | |
1944 | ||
9848a404 | 1945 | void migrate_fd_connect(MigrationState *s) |
0d82d0e8 | 1946 | { |
2ff30257 | 1947 | s->expected_downtime = s->parameters.downtime_limit; |
bb1fadc4 | 1948 | s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s); |
0d82d0e8 | 1949 | |
9e4d2b98 | 1950 | qemu_file_set_blocking(s->to_dst_file, true); |
89a02a9f | 1951 | qemu_file_set_rate_limit(s->to_dst_file, |
2ff30257 | 1952 | s->parameters.max_bandwidth / XFER_LIMIT_RATIO); |
442773ce | 1953 | |
9287ac27 SH |
1954 | /* Notify before starting migration thread */ |
1955 | notifier_list_notify(&migration_state_notifiers, s); | |
1956 | ||
1d34e4bf DDAG |
1957 | /* |
1958 | * Open the return path; currently for postcopy but other things might | |
1959 | * also want it. | |
1960 | */ | |
1961 | if (migrate_postcopy_ram()) { | |
1962 | if (open_return_path_on_source(s)) { | |
1963 | error_report("Unable to open return-path for postcopy"); | |
48781e5b | 1964 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
1d34e4bf DDAG |
1965 | MIGRATION_STATUS_FAILED); |
1966 | migrate_fd_cleanup(s); | |
1967 | return; | |
1968 | } | |
1969 | } | |
1970 | ||
8706d2d5 | 1971 | migrate_compress_threads_create(); |
4900116e | 1972 | qemu_thread_create(&s->thread, "migration", migration_thread, s, |
bb1fadc4 | 1973 | QEMU_THREAD_JOINABLE); |
1d34e4bf | 1974 | s->migration_thread_running = true; |
0d82d0e8 | 1975 | } |
093e3c42 DDAG |
1976 | |
1977 | PostcopyState postcopy_state_get(void) | |
1978 | { | |
1979 | return atomic_mb_read(&incoming_postcopy_state); | |
1980 | } | |
1981 | ||
1982 | /* Set the state and return the old state */ | |
1983 | PostcopyState postcopy_state_set(PostcopyState new_state) | |
1984 | { | |
1985 | return atomic_xchg(&incoming_postcopy_state, new_state); | |
1986 | } | |
1987 |