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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" |
795c40b8 | 19 | #include "migration/blocker.h" |
f4dbe1bf | 20 | #include "exec.h" |
7fcac4a2 | 21 | #include "fd.h" |
61e8b148 | 22 | #include "socket.h" |
e1a3ecee | 23 | #include "rdma.h" |
7b1e1a22 | 24 | #include "ram.h" |
84a899de | 25 | #include "migration/global_state.h" |
c4b63b7c | 26 | #include "migration/misc.h" |
6666c96a | 27 | #include "migration.h" |
20a519a0 | 28 | #include "savevm.h" |
40014d81 | 29 | #include "qemu-file-channel.h" |
08a0aee1 | 30 | #include "qemu-file.h" |
987772d9 | 31 | #include "migration/vmstate.h" |
737e150e | 32 | #include "block/block.h" |
cc7a8ea7 | 33 | #include "qapi/qmp/qerror.h" |
ab28bd23 | 34 | #include "qemu/rcu.h" |
2c9e6fec | 35 | #include "block.h" |
be07b0ac | 36 | #include "postcopy-ram.h" |
766bd176 | 37 | #include "qemu/thread.h" |
791e7c82 | 38 | #include "qmp-commands.h" |
c09e5bb1 | 39 | #include "trace.h" |
598cd2bd | 40 | #include "qapi-event.h" |
51180423 | 41 | #include "exec/target_page.h" |
61b67d47 | 42 | #include "io/channel-buffer.h" |
35a6ed4f | 43 | #include "migration/colo.h" |
4ffdb337 | 44 | #include "hw/boards.h" |
9d18af93 | 45 | #include "monitor/monitor.h" |
065e2813 | 46 | |
dc325627 | 47 | #define MAX_THROTTLE (32 << 20) /* Migration transfer speed throttling */ |
5bb7910a | 48 | |
5b4e1eb7 JQ |
49 | /* Amount of time to allocate to each "chunk" of bandwidth-throttled |
50 | * data. */ | |
51 | #define BUFFER_DELAY 100 | |
52 | #define XFER_LIMIT_RATIO (1000 / BUFFER_DELAY) | |
53 | ||
2ff30257 AA |
54 | /* Time in milliseconds we are allowed to stop the source, |
55 | * for sending the last part */ | |
56 | #define DEFAULT_MIGRATE_SET_DOWNTIME 300 | |
57 | ||
87c9cc1c DHB |
58 | /* Maximum migrate downtime set to 2000 seconds */ |
59 | #define MAX_MIGRATE_DOWNTIME_SECONDS 2000 | |
60 | #define MAX_MIGRATE_DOWNTIME (MAX_MIGRATE_DOWNTIME_SECONDS * 1000) | |
61 | ||
8706d2d5 LL |
62 | /* Default compression thread count */ |
63 | #define DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT 8 | |
3fcb38c2 LL |
64 | /* Default decompression thread count, usually decompression is at |
65 | * least 4 times as fast as compression.*/ | |
66 | #define DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT 2 | |
8706d2d5 LL |
67 | /*0: means nocompress, 1: best speed, ... 9: best compress ratio */ |
68 | #define DEFAULT_MIGRATE_COMPRESS_LEVEL 1 | |
1626fee3 | 69 | /* Define default autoconverge cpu throttle migration parameters */ |
d85a31d1 JH |
70 | #define DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL 20 |
71 | #define DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT 10 | |
8706d2d5 | 72 | |
17ad9b35 OW |
73 | /* Migration XBZRLE default cache size */ |
74 | #define DEFAULT_MIGRATE_CACHE_SIZE (64 * 1024 * 1024) | |
75 | ||
68b53591 HZ |
76 | /* The delay time (in ms) between two COLO checkpoints |
77 | * Note: Please change this default value to 10000 when we support hybrid mode. | |
78 | */ | |
79 | #define DEFAULT_MIGRATE_X_CHECKPOINT_DELAY 200 | |
4075fb1c | 80 | #define DEFAULT_MIGRATE_MULTIFD_CHANNELS 2 |
0fb86605 | 81 | #define DEFAULT_MIGRATE_MULTIFD_PAGE_COUNT 16 |
68b53591 | 82 | |
99a0db9b GH |
83 | static NotifierList migration_state_notifiers = |
84 | NOTIFIER_LIST_INITIALIZER(migration_state_notifiers); | |
85 | ||
adde220a DDAG |
86 | static bool deferred_incoming; |
87 | ||
da6f1790 JQ |
88 | /* Messages sent on the return path from destination to source */ |
89 | enum mig_rp_message_type { | |
90 | MIG_RP_MSG_INVALID = 0, /* Must be 0 */ | |
91 | MIG_RP_MSG_SHUT, /* sibling will not send any more RP messages */ | |
92 | MIG_RP_MSG_PONG, /* Response to a PING; data (seq: be32 ) */ | |
93 | ||
94 | MIG_RP_MSG_REQ_PAGES_ID, /* data (start: be64, len: be32, id: string) */ | |
95 | MIG_RP_MSG_REQ_PAGES, /* data (start: be64, len: be32) */ | |
96 | ||
97 | MIG_RP_MSG_MAX | |
98 | }; | |
99 | ||
17549e84 JQ |
100 | /* When we add fault tolerance, we could have several |
101 | migrations at once. For now we don't need to add | |
102 | dynamic creation of migration */ | |
103 | ||
e5cb7e76 PX |
104 | static MigrationState *current_migration; |
105 | ||
8b0b29dc PX |
106 | static bool migration_object_check(MigrationState *ms, Error **errp); |
107 | ||
e5cb7e76 PX |
108 | void migration_object_init(void) |
109 | { | |
4ffdb337 | 110 | MachineState *ms = MACHINE(qdev_get_machine()); |
8b0b29dc | 111 | Error *err = NULL; |
4ffdb337 | 112 | |
e5cb7e76 PX |
113 | /* This can only be called once. */ |
114 | assert(!current_migration); | |
115 | current_migration = MIGRATION_OBJ(object_new(TYPE_MIGRATION)); | |
4ffdb337 | 116 | |
8b0b29dc PX |
117 | if (!migration_object_check(current_migration, &err)) { |
118 | error_report_err(err); | |
119 | exit(1); | |
120 | } | |
121 | ||
4ffdb337 PX |
122 | /* |
123 | * We cannot really do this in migration_instance_init() since at | |
124 | * that time global properties are not yet applied, then this | |
125 | * value will be definitely replaced by something else. | |
126 | */ | |
127 | if (ms->enforce_config_section) { | |
128 | current_migration->send_configuration = true; | |
129 | } | |
e5cb7e76 PX |
130 | } |
131 | ||
bca7856a | 132 | /* For outgoing */ |
859bc756 | 133 | MigrationState *migrate_get_current(void) |
17549e84 | 134 | { |
e5cb7e76 PX |
135 | /* This can only be called after the object created. */ |
136 | assert(current_migration); | |
137 | return current_migration; | |
17549e84 JQ |
138 | } |
139 | ||
bca7856a DDAG |
140 | MigrationIncomingState *migration_incoming_get_current(void) |
141 | { | |
b4b076da JQ |
142 | static bool once; |
143 | static MigrationIncomingState mis_current; | |
bca7856a | 144 | |
b4b076da JQ |
145 | if (!once) { |
146 | mis_current.state = MIGRATION_STATUS_NONE; | |
147 | memset(&mis_current, 0, sizeof(MigrationIncomingState)); | |
b4b076da JQ |
148 | qemu_mutex_init(&mis_current.rp_mutex); |
149 | qemu_event_init(&mis_current.main_thread_load_event, false); | |
150 | once = true; | |
151 | } | |
152 | return &mis_current; | |
bca7856a DDAG |
153 | } |
154 | ||
155 | void migration_incoming_state_destroy(void) | |
156 | { | |
b4b076da JQ |
157 | struct MigrationIncomingState *mis = migration_incoming_get_current(); |
158 | ||
3482655b | 159 | if (mis->to_src_file) { |
660819b1 PX |
160 | /* Tell source that we are done */ |
161 | migrate_send_rp_shut(mis, qemu_file_get_error(mis->from_src_file) != 0); | |
3482655b PX |
162 | qemu_fclose(mis->to_src_file); |
163 | mis->to_src_file = NULL; | |
164 | } | |
165 | ||
660819b1 PX |
166 | if (mis->from_src_file) { |
167 | qemu_fclose(mis->from_src_file); | |
168 | mis->from_src_file = NULL; | |
169 | } | |
170 | ||
5089e186 | 171 | qemu_event_reset(&mis->main_thread_load_event); |
bca7856a DDAG |
172 | } |
173 | ||
b05dc723 JQ |
174 | static void migrate_generate_event(int new_state) |
175 | { | |
176 | if (migrate_use_events()) { | |
177 | qapi_event_send_migration(new_state, &error_abort); | |
b05dc723 JQ |
178 | } |
179 | } | |
180 | ||
adde220a DDAG |
181 | /* |
182 | * Called on -incoming with a defer: uri. | |
183 | * The migration can be started later after any parameters have been | |
184 | * changed. | |
185 | */ | |
186 | static void deferred_incoming_migration(Error **errp) | |
187 | { | |
188 | if (deferred_incoming) { | |
189 | error_setg(errp, "Incoming migration already deferred"); | |
190 | } | |
191 | deferred_incoming = true; | |
192 | } | |
193 | ||
da6f1790 JQ |
194 | /* |
195 | * Send a message on the return channel back to the source | |
196 | * of the migration. | |
197 | */ | |
198 | static void migrate_send_rp_message(MigrationIncomingState *mis, | |
199 | enum mig_rp_message_type message_type, | |
200 | uint16_t len, void *data) | |
201 | { | |
202 | trace_migrate_send_rp_message((int)message_type, len); | |
203 | qemu_mutex_lock(&mis->rp_mutex); | |
204 | qemu_put_be16(mis->to_src_file, (unsigned int)message_type); | |
205 | qemu_put_be16(mis->to_src_file, len); | |
206 | qemu_put_buffer(mis->to_src_file, data, len); | |
207 | qemu_fflush(mis->to_src_file); | |
208 | qemu_mutex_unlock(&mis->rp_mutex); | |
209 | } | |
210 | ||
1e2d90eb DDAG |
211 | /* Request a range of pages from the source VM at the given |
212 | * start address. | |
213 | * rbname: Name of the RAMBlock to request the page in, if NULL it's the same | |
214 | * as the last request (a name must have been given previously) | |
215 | * Start: Address offset within the RB | |
216 | * Len: Length in bytes required - must be a multiple of pagesize | |
217 | */ | |
218 | void migrate_send_rp_req_pages(MigrationIncomingState *mis, const char *rbname, | |
219 | ram_addr_t start, size_t len) | |
220 | { | |
cb8d4c8f | 221 | uint8_t bufc[12 + 1 + 255]; /* start (8), len (4), rbname up to 256 */ |
1e2d90eb DDAG |
222 | size_t msglen = 12; /* start + len */ |
223 | ||
224 | *(uint64_t *)bufc = cpu_to_be64((uint64_t)start); | |
225 | *(uint32_t *)(bufc + 8) = cpu_to_be32((uint32_t)len); | |
226 | ||
227 | if (rbname) { | |
228 | int rbname_len = strlen(rbname); | |
229 | assert(rbname_len < 256); | |
230 | ||
231 | bufc[msglen++] = rbname_len; | |
232 | memcpy(bufc + msglen, rbname, rbname_len); | |
233 | msglen += rbname_len; | |
234 | migrate_send_rp_message(mis, MIG_RP_MSG_REQ_PAGES_ID, msglen, bufc); | |
235 | } else { | |
236 | migrate_send_rp_message(mis, MIG_RP_MSG_REQ_PAGES, msglen, bufc); | |
237 | } | |
238 | } | |
239 | ||
43eaae28 | 240 | void qemu_start_incoming_migration(const char *uri, Error **errp) |
5bb7910a | 241 | { |
34c9dd8e AL |
242 | const char *p; |
243 | ||
7cf1fe6d | 244 | qapi_event_send_migration(MIGRATION_STATUS_SETUP, &error_abort); |
adde220a DDAG |
245 | if (!strcmp(uri, "defer")) { |
246 | deferred_incoming_migration(errp); | |
247 | } else if (strstart(uri, "tcp:", &p)) { | |
43eaae28 | 248 | tcp_start_incoming_migration(p, errp); |
2da776db | 249 | #ifdef CONFIG_RDMA |
adde220a | 250 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
251 | rdma_start_incoming_migration(p, errp); |
252 | #endif | |
adde220a | 253 | } else if (strstart(uri, "exec:", &p)) { |
43eaae28 | 254 | exec_start_incoming_migration(p, errp); |
adde220a | 255 | } else if (strstart(uri, "unix:", &p)) { |
43eaae28 | 256 | unix_start_incoming_migration(p, errp); |
adde220a | 257 | } else if (strstart(uri, "fd:", &p)) { |
43eaae28 | 258 | fd_start_incoming_migration(p, errp); |
adde220a | 259 | } else { |
312fd5f2 | 260 | error_setg(errp, "unknown migration protocol: %s", uri); |
8ca5e801 | 261 | } |
5bb7910a AL |
262 | } |
263 | ||
0aa6aefc DL |
264 | static void process_incoming_migration_bh(void *opaque) |
265 | { | |
266 | Error *local_err = NULL; | |
267 | MigrationIncomingState *mis = opaque; | |
268 | ||
ace21a58 KW |
269 | /* Make sure all file formats flush their mutable metadata. |
270 | * If we get an error here, just don't restart the VM yet. */ | |
0aa6aefc | 271 | bdrv_invalidate_cache_all(&local_err); |
d35ff5e6 | 272 | if (local_err) { |
ace21a58 | 273 | error_report_err(local_err); |
d35ff5e6 KW |
274 | local_err = NULL; |
275 | autostart = false; | |
276 | } | |
277 | ||
0aa6aefc DL |
278 | /* |
279 | * This must happen after all error conditions are dealt with and | |
280 | * we're sure the VM is going to be running on this host. | |
281 | */ | |
282 | qemu_announce_self(); | |
283 | ||
f986c3d2 JQ |
284 | if (multifd_load_cleanup(&local_err) != 0) { |
285 | error_report_err(local_err); | |
286 | autostart = false; | |
287 | } | |
0aa6aefc DL |
288 | /* If global state section was not received or we are in running |
289 | state, we need to obey autostart. Any other state is set with | |
290 | runstate_set. */ | |
291 | ||
292 | if (!global_state_received() || | |
293 | global_state_get_runstate() == RUN_STATE_RUNNING) { | |
294 | if (autostart) { | |
295 | vm_start(); | |
296 | } else { | |
297 | runstate_set(RUN_STATE_PAUSED); | |
298 | } | |
299 | } else { | |
300 | runstate_set(global_state_get_runstate()); | |
301 | } | |
0aa6aefc DL |
302 | /* |
303 | * This must happen after any state changes since as soon as an external | |
304 | * observer sees this event they might start to prod at the VM assuming | |
305 | * it's ready to use. | |
306 | */ | |
307 | migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, | |
308 | MIGRATION_STATUS_COMPLETED); | |
309 | qemu_bh_delete(mis->bh); | |
310 | migration_incoming_state_destroy(); | |
311 | } | |
312 | ||
82a4da79 | 313 | static void process_incoming_migration_co(void *opaque) |
511c0231 | 314 | { |
b4b076da | 315 | MigrationIncomingState *mis = migration_incoming_get_current(); |
e9bef235 | 316 | PostcopyState ps; |
1c12e1f5 PB |
317 | int ret; |
318 | ||
4f0fae7f | 319 | assert(mis->from_src_file); |
67f11b5c | 320 | mis->largest_page_size = qemu_ram_pagesize_largest(); |
093e3c42 | 321 | postcopy_state_set(POSTCOPY_INCOMING_NONE); |
93d7af6f HZ |
322 | migrate_set_state(&mis->state, MIGRATION_STATUS_NONE, |
323 | MIGRATION_STATUS_ACTIVE); | |
4f0fae7f | 324 | ret = qemu_loadvm_state(mis->from_src_file); |
bca7856a | 325 | |
e9bef235 DDAG |
326 | ps = postcopy_state_get(); |
327 | trace_process_incoming_migration_co_end(ret, ps); | |
328 | if (ps != POSTCOPY_INCOMING_NONE) { | |
329 | if (ps == POSTCOPY_INCOMING_ADVISE) { | |
330 | /* | |
331 | * Where a migration had postcopy enabled (and thus went to advise) | |
332 | * but managed to complete within the precopy period, we can use | |
333 | * the normal exit. | |
334 | */ | |
335 | postcopy_ram_incoming_cleanup(mis); | |
336 | } else if (ret >= 0) { | |
337 | /* | |
338 | * Postcopy was started, cleanup should happen at the end of the | |
339 | * postcopy thread. | |
340 | */ | |
341 | trace_process_incoming_migration_co_postcopy_end_main(); | |
342 | return; | |
343 | } | |
344 | /* Else if something went wrong then just fall out of the normal exit */ | |
345 | } | |
346 | ||
25d0c16f HZ |
347 | /* we get COLO info, and know if we are in COLO mode */ |
348 | if (!ret && migration_incoming_enable_colo()) { | |
349 | mis->migration_incoming_co = qemu_coroutine_self(); | |
350 | qemu_thread_create(&mis->colo_incoming_thread, "COLO incoming", | |
351 | colo_process_incoming_thread, mis, QEMU_THREAD_JOINABLE); | |
352 | mis->have_colo_incoming_thread = true; | |
353 | qemu_coroutine_yield(); | |
354 | ||
355 | /* Wait checkpoint incoming thread exit before free resource */ | |
356 | qemu_thread_join(&mis->colo_incoming_thread); | |
357 | } | |
358 | ||
1c12e1f5 | 359 | if (ret < 0) { |
f986c3d2 JQ |
360 | Error *local_err = NULL; |
361 | ||
93d7af6f HZ |
362 | migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, |
363 | MIGRATION_STATUS_FAILED); | |
db80face | 364 | error_report("load of migration failed: %s", strerror(-ret)); |
3a0f2cea | 365 | qemu_fclose(mis->from_src_file); |
f986c3d2 JQ |
366 | if (multifd_load_cleanup(&local_err) != 0) { |
367 | error_report_err(local_err); | |
368 | } | |
4aead692 | 369 | exit(EXIT_FAILURE); |
511c0231 | 370 | } |
0aa6aefc DL |
371 | mis->bh = qemu_bh_new(process_incoming_migration_bh, mis); |
372 | qemu_bh_schedule(mis->bh); | |
511c0231 JQ |
373 | } |
374 | ||
e595a01a | 375 | static void migration_incoming_setup(QEMUFile *f) |
82a4da79 | 376 | { |
4f0fae7f | 377 | MigrationIncomingState *mis = migration_incoming_get_current(); |
82a4da79 | 378 | |
f986c3d2 JQ |
379 | if (multifd_load_setup() != 0) { |
380 | /* We haven't been able to create multifd threads | |
381 | nothing better to do */ | |
382 | exit(EXIT_FAILURE); | |
383 | } | |
384 | ||
4f0fae7f JQ |
385 | if (!mis->from_src_file) { |
386 | mis->from_src_file = f; | |
387 | } | |
06ad5135 | 388 | qemu_file_set_blocking(f, false); |
e595a01a JQ |
389 | } |
390 | ||
391 | static void migration_incoming_process(void) | |
392 | { | |
393 | Coroutine *co = qemu_coroutine_create(process_incoming_migration_co, NULL); | |
0b8b8753 | 394 | qemu_coroutine_enter(co); |
82a4da79 PB |
395 | } |
396 | ||
e595a01a JQ |
397 | void migration_fd_process_incoming(QEMUFile *f) |
398 | { | |
399 | migration_incoming_setup(f); | |
400 | migration_incoming_process(); | |
401 | } | |
402 | ||
4f0fae7f JQ |
403 | void migration_ioc_process_incoming(QIOChannel *ioc) |
404 | { | |
405 | MigrationIncomingState *mis = migration_incoming_get_current(); | |
406 | ||
407 | if (!mis->from_src_file) { | |
408 | QEMUFile *f = qemu_fopen_channel_input(ioc); | |
409 | migration_fd_process_incoming(f); | |
410 | } | |
411 | /* We still only have a single channel. Nothing to do here yet */ | |
412 | } | |
413 | ||
428d8908 JQ |
414 | /** |
415 | * @migration_has_all_channels: We have received all channels that we need | |
416 | * | |
417 | * Returns true when we have got connections to all the channels that | |
418 | * we need for migration. | |
419 | */ | |
420 | bool migration_has_all_channels(void) | |
421 | { | |
422 | return true; | |
423 | } | |
424 | ||
6decec93 DDAG |
425 | /* |
426 | * Send a 'SHUT' message on the return channel with the given value | |
427 | * to indicate that we've finished with the RP. Non-0 value indicates | |
428 | * error. | |
429 | */ | |
430 | void migrate_send_rp_shut(MigrationIncomingState *mis, | |
431 | uint32_t value) | |
432 | { | |
433 | uint32_t buf; | |
434 | ||
435 | buf = cpu_to_be32(value); | |
436 | migrate_send_rp_message(mis, MIG_RP_MSG_SHUT, sizeof(buf), &buf); | |
437 | } | |
438 | ||
439 | /* | |
440 | * Send a 'PONG' message on the return channel with the given value | |
441 | * (normally in response to a 'PING') | |
442 | */ | |
443 | void migrate_send_rp_pong(MigrationIncomingState *mis, | |
444 | uint32_t value) | |
445 | { | |
446 | uint32_t buf; | |
447 | ||
448 | buf = cpu_to_be32(value); | |
449 | migrate_send_rp_message(mis, MIG_RP_MSG_PONG, sizeof(buf), &buf); | |
450 | } | |
451 | ||
bbf6da32 OW |
452 | MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) |
453 | { | |
454 | MigrationCapabilityStatusList *head = NULL; | |
455 | MigrationCapabilityStatusList *caps; | |
456 | MigrationState *s = migrate_get_current(); | |
457 | int i; | |
458 | ||
387eedeb | 459 | caps = NULL; /* silence compiler warning */ |
7fb1cf16 | 460 | for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { |
ed1701c6 DDAG |
461 | #ifndef CONFIG_LIVE_BLOCK_MIGRATION |
462 | if (i == MIGRATION_CAPABILITY_BLOCK) { | |
463 | continue; | |
464 | } | |
465 | #endif | |
bbf6da32 OW |
466 | if (head == NULL) { |
467 | head = g_malloc0(sizeof(*caps)); | |
468 | caps = head; | |
469 | } else { | |
470 | caps->next = g_malloc0(sizeof(*caps)); | |
471 | caps = caps->next; | |
472 | } | |
473 | caps->value = | |
474 | g_malloc(sizeof(*caps->value)); | |
475 | caps->value->capability = i; | |
476 | caps->value->state = s->enabled_capabilities[i]; | |
477 | } | |
478 | ||
479 | return head; | |
480 | } | |
481 | ||
85de8323 LL |
482 | MigrationParameters *qmp_query_migrate_parameters(Error **errp) |
483 | { | |
484 | MigrationParameters *params; | |
485 | MigrationState *s = migrate_get_current(); | |
486 | ||
e87fae4c | 487 | /* TODO use QAPI_CLONE() instead of duplicating it inline */ |
85de8323 | 488 | params = g_malloc0(sizeof(*params)); |
de63ab61 | 489 | params->has_compress_level = true; |
2594f56d | 490 | params->compress_level = s->parameters.compress_level; |
de63ab61 | 491 | params->has_compress_threads = true; |
2594f56d | 492 | params->compress_threads = s->parameters.compress_threads; |
de63ab61 | 493 | params->has_decompress_threads = true; |
2594f56d | 494 | params->decompress_threads = s->parameters.decompress_threads; |
de63ab61 | 495 | params->has_cpu_throttle_initial = true; |
2594f56d | 496 | params->cpu_throttle_initial = s->parameters.cpu_throttle_initial; |
de63ab61 | 497 | params->has_cpu_throttle_increment = true; |
2594f56d | 498 | params->cpu_throttle_increment = s->parameters.cpu_throttle_increment; |
8cc99dcd | 499 | params->has_tls_creds = true; |
69ef1f36 | 500 | params->tls_creds = g_strdup(s->parameters.tls_creds); |
8cc99dcd | 501 | params->has_tls_hostname = true; |
69ef1f36 | 502 | params->tls_hostname = g_strdup(s->parameters.tls_hostname); |
2ff30257 AA |
503 | params->has_max_bandwidth = true; |
504 | params->max_bandwidth = s->parameters.max_bandwidth; | |
505 | params->has_downtime_limit = true; | |
506 | params->downtime_limit = s->parameters.downtime_limit; | |
fe39a4d4 | 507 | params->has_x_checkpoint_delay = true; |
68b53591 | 508 | params->x_checkpoint_delay = s->parameters.x_checkpoint_delay; |
2833c59b JQ |
509 | params->has_block_incremental = true; |
510 | params->block_incremental = s->parameters.block_incremental; | |
4075fb1c JQ |
511 | params->has_x_multifd_channels = true; |
512 | params->x_multifd_channels = s->parameters.x_multifd_channels; | |
0fb86605 JQ |
513 | params->has_x_multifd_page_count = true; |
514 | params->x_multifd_page_count = s->parameters.x_multifd_page_count; | |
85de8323 LL |
515 | |
516 | return params; | |
517 | } | |
518 | ||
f6844b99 DDAG |
519 | /* |
520 | * Return true if we're already in the middle of a migration | |
521 | * (i.e. any of the active or setup states) | |
522 | */ | |
523 | static bool migration_is_setup_or_active(int state) | |
524 | { | |
525 | switch (state) { | |
526 | case MIGRATION_STATUS_ACTIVE: | |
9ec055ae | 527 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: |
f6844b99 DDAG |
528 | case MIGRATION_STATUS_SETUP: |
529 | return true; | |
530 | ||
531 | default: | |
532 | return false; | |
533 | ||
534 | } | |
535 | } | |
536 | ||
a22463a5 DDAG |
537 | static void populate_ram_info(MigrationInfo *info, MigrationState *s) |
538 | { | |
539 | info->has_ram = true; | |
540 | info->ram = g_malloc0(sizeof(*info->ram)); | |
9360447d | 541 | info->ram->transferred = ram_counters.transferred; |
a22463a5 | 542 | info->ram->total = ram_bytes_total(); |
9360447d | 543 | info->ram->duplicate = ram_counters.duplicate; |
bedf53c1 JQ |
544 | /* legacy value. It is not used anymore */ |
545 | info->ram->skipped = 0; | |
9360447d JQ |
546 | info->ram->normal = ram_counters.normal; |
547 | info->ram->normal_bytes = ram_counters.normal * | |
20afaed9 | 548 | qemu_target_page_size(); |
a22463a5 | 549 | info->ram->mbps = s->mbps; |
9360447d JQ |
550 | info->ram->dirty_sync_count = ram_counters.dirty_sync_count; |
551 | info->ram->postcopy_requests = ram_counters.postcopy_requests; | |
030ce1f8 | 552 | info->ram->page_size = qemu_target_page_size(); |
a22463a5 | 553 | |
114f5aee JQ |
554 | if (migrate_use_xbzrle()) { |
555 | info->has_xbzrle_cache = true; | |
556 | info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache)); | |
557 | info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size(); | |
9360447d JQ |
558 | info->xbzrle_cache->bytes = xbzrle_counters.bytes; |
559 | info->xbzrle_cache->pages = xbzrle_counters.pages; | |
560 | info->xbzrle_cache->cache_miss = xbzrle_counters.cache_miss; | |
561 | info->xbzrle_cache->cache_miss_rate = xbzrle_counters.cache_miss_rate; | |
562 | info->xbzrle_cache->overflow = xbzrle_counters.overflow; | |
114f5aee JQ |
563 | } |
564 | ||
338182c8 JQ |
565 | if (cpu_throttle_active()) { |
566 | info->has_cpu_throttle_percentage = true; | |
567 | info->cpu_throttle_percentage = cpu_throttle_get_percentage(); | |
568 | } | |
569 | ||
a22463a5 DDAG |
570 | if (s->state != MIGRATION_STATUS_COMPLETED) { |
571 | info->ram->remaining = ram_bytes_remaining(); | |
9360447d | 572 | info->ram->dirty_pages_rate = ram_counters.dirty_pages_rate; |
a22463a5 DDAG |
573 | } |
574 | } | |
575 | ||
930ac04c JQ |
576 | static void populate_disk_info(MigrationInfo *info) |
577 | { | |
578 | if (blk_mig_active()) { | |
579 | info->has_disk = true; | |
580 | info->disk = g_malloc0(sizeof(*info->disk)); | |
581 | info->disk->transferred = blk_mig_bytes_transferred(); | |
582 | info->disk->remaining = blk_mig_bytes_remaining(); | |
583 | info->disk->total = blk_mig_bytes_total(); | |
584 | } | |
585 | } | |
586 | ||
791e7c82 | 587 | MigrationInfo *qmp_query_migrate(Error **errp) |
5bb7910a | 588 | { |
791e7c82 | 589 | MigrationInfo *info = g_malloc0(sizeof(*info)); |
17549e84 JQ |
590 | MigrationState *s = migrate_get_current(); |
591 | ||
592 | switch (s->state) { | |
31194731 | 593 | case MIGRATION_STATUS_NONE: |
17549e84 JQ |
594 | /* no migration has happened ever */ |
595 | break; | |
31194731 | 596 | case MIGRATION_STATUS_SETUP: |
29ae8a41 | 597 | info->has_status = true; |
ed4fbd10 | 598 | info->has_total_time = false; |
29ae8a41 | 599 | break; |
31194731 HZ |
600 | case MIGRATION_STATUS_ACTIVE: |
601 | case MIGRATION_STATUS_CANCELLING: | |
9ec055ae | 602 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: |
c8f9f4f4 | 603 | /* TODO add some postcopy stats */ |
9ec055ae DDAG |
604 | info->has_status = true; |
605 | info->has_total_time = true; | |
606 | info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) | |
607 | - s->total_time; | |
608 | info->has_expected_downtime = true; | |
609 | info->expected_downtime = s->expected_downtime; | |
610 | info->has_setup_time = true; | |
611 | info->setup_time = s->setup_time; | |
612 | ||
a22463a5 | 613 | populate_ram_info(info, s); |
930ac04c | 614 | populate_disk_info(info); |
17549e84 | 615 | break; |
0b827d5e HZ |
616 | case MIGRATION_STATUS_COLO: |
617 | info->has_status = true; | |
618 | /* TODO: display COLO specific information (checkpoint info etc.) */ | |
619 | break; | |
31194731 | 620 | case MIGRATION_STATUS_COMPLETED: |
791e7c82 | 621 | info->has_status = true; |
00c14997 | 622 | info->has_total_time = true; |
7aa939af | 623 | info->total_time = s->total_time; |
9c5a9fcf JQ |
624 | info->has_downtime = true; |
625 | info->downtime = s->downtime; | |
ed4fbd10 MH |
626 | info->has_setup_time = true; |
627 | info->setup_time = s->setup_time; | |
d5f8a570 | 628 | |
a22463a5 | 629 | populate_ram_info(info, s); |
17549e84 | 630 | break; |
31194731 | 631 | case MIGRATION_STATUS_FAILED: |
791e7c82 | 632 | info->has_status = true; |
d59ce6f3 DB |
633 | if (s->error) { |
634 | info->has_error_desc = true; | |
635 | info->error_desc = g_strdup(error_get_pretty(s->error)); | |
636 | } | |
17549e84 | 637 | break; |
31194731 | 638 | case MIGRATION_STATUS_CANCELLED: |
791e7c82 | 639 | info->has_status = true; |
17549e84 | 640 | break; |
5bb7910a | 641 | } |
cde63fbe | 642 | info->status = s->state; |
791e7c82 LC |
643 | |
644 | return info; | |
5bb7910a AL |
645 | } |
646 | ||
4a84214e PX |
647 | /** |
648 | * @migration_caps_check - check capability validity | |
649 | * | |
650 | * @cap_list: old capability list, array of bool | |
651 | * @params: new capabilities to be applied soon | |
652 | * @errp: set *errp if the check failed, with reason | |
653 | * | |
654 | * Returns true if check passed, otherwise false. | |
655 | */ | |
656 | static bool migrate_caps_check(bool *cap_list, | |
657 | MigrationCapabilityStatusList *params, | |
658 | Error **errp) | |
00458433 | 659 | { |
00458433 | 660 | MigrationCapabilityStatusList *cap; |
4a84214e | 661 | bool old_postcopy_cap; |
d7651f15 | 662 | MigrationIncomingState *mis = migration_incoming_get_current(); |
00458433 | 663 | |
4a84214e | 664 | old_postcopy_cap = cap_list[MIGRATION_CAPABILITY_POSTCOPY_RAM]; |
00458433 OW |
665 | |
666 | for (cap = params; cap; cap = cap->next) { | |
4a84214e PX |
667 | cap_list[cap->value->capability] = cap->value->state; |
668 | } | |
669 | ||
ed1701c6 | 670 | #ifndef CONFIG_LIVE_BLOCK_MIGRATION |
4a84214e PX |
671 | if (cap_list[MIGRATION_CAPABILITY_BLOCK]) { |
672 | error_setg(errp, "QEMU compiled without old-style (blk/-b, inc/-i) " | |
673 | "block migration"); | |
674 | error_append_hint(errp, "Use drive_mirror+NBD instead.\n"); | |
675 | return false; | |
00458433 | 676 | } |
4a84214e | 677 | #endif |
53dd370c | 678 | |
4a84214e PX |
679 | if (cap_list[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { |
680 | if (cap_list[MIGRATION_CAPABILITY_COMPRESS]) { | |
53dd370c DDAG |
681 | /* The decompression threads asynchronously write into RAM |
682 | * rather than use the atomic copies needed to avoid | |
683 | * userfaulting. It should be possible to fix the decompression | |
684 | * threads for compatibility in future. | |
685 | */ | |
4a84214e PX |
686 | error_setg(errp, "Postcopy is not currently compatible " |
687 | "with compression"); | |
688 | return false; | |
53dd370c | 689 | } |
4a84214e | 690 | |
096631bd DDAG |
691 | /* This check is reasonably expensive, so only when it's being |
692 | * set the first time, also it's only the destination that needs | |
693 | * special support. | |
694 | */ | |
695 | if (!old_postcopy_cap && runstate_check(RUN_STATE_INMIGRATE) && | |
d7651f15 | 696 | !postcopy_ram_supported_by_host(mis)) { |
096631bd DDAG |
697 | /* postcopy_ram_supported_by_host will have emitted a more |
698 | * detailed message | |
699 | */ | |
4a84214e PX |
700 | error_setg(errp, "Postcopy is not supported"); |
701 | return false; | |
096631bd | 702 | } |
53dd370c | 703 | } |
4a84214e PX |
704 | |
705 | return true; | |
706 | } | |
707 | ||
708 | void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, | |
709 | Error **errp) | |
710 | { | |
711 | MigrationState *s = migrate_get_current(); | |
712 | MigrationCapabilityStatusList *cap; | |
713 | ||
714 | if (migration_is_setup_or_active(s->state)) { | |
715 | error_setg(errp, QERR_MIGRATION_ACTIVE); | |
716 | return; | |
717 | } | |
718 | ||
719 | if (!migrate_caps_check(s->enabled_capabilities, params, errp)) { | |
720 | return; | |
721 | } | |
722 | ||
723 | for (cap = params; cap; cap = cap->next) { | |
724 | s->enabled_capabilities[cap->value->capability] = cap->value->state; | |
725 | } | |
00458433 OW |
726 | } |
727 | ||
16d063bc PX |
728 | /* |
729 | * Check whether the parameters are valid. Error will be put into errp | |
730 | * (if provided). Return true if valid, otherwise false. | |
731 | */ | |
732 | static bool migrate_params_check(MigrationParameters *params, Error **errp) | |
85de8323 | 733 | { |
7f375e04 EB |
734 | if (params->has_compress_level && |
735 | (params->compress_level < 0 || params->compress_level > 9)) { | |
c6bd8c70 MA |
736 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level", |
737 | "is invalid, it should be in the range of 0 to 9"); | |
16d063bc | 738 | return false; |
85de8323 | 739 | } |
16d063bc | 740 | |
7f375e04 EB |
741 | if (params->has_compress_threads && |
742 | (params->compress_threads < 1 || params->compress_threads > 255)) { | |
c6bd8c70 MA |
743 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
744 | "compress_threads", | |
745 | "is invalid, it should be in the range of 1 to 255"); | |
16d063bc | 746 | return false; |
85de8323 | 747 | } |
16d063bc | 748 | |
7f375e04 EB |
749 | if (params->has_decompress_threads && |
750 | (params->decompress_threads < 1 || params->decompress_threads > 255)) { | |
c6bd8c70 MA |
751 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
752 | "decompress_threads", | |
753 | "is invalid, it should be in the range of 1 to 255"); | |
16d063bc | 754 | return false; |
85de8323 | 755 | } |
16d063bc | 756 | |
7f375e04 EB |
757 | if (params->has_cpu_throttle_initial && |
758 | (params->cpu_throttle_initial < 1 || | |
759 | params->cpu_throttle_initial > 99)) { | |
1626fee3 | 760 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
d85a31d1 | 761 | "cpu_throttle_initial", |
1626fee3 | 762 | "an integer in the range of 1 to 99"); |
16d063bc | 763 | return false; |
1626fee3 | 764 | } |
16d063bc | 765 | |
7f375e04 EB |
766 | if (params->has_cpu_throttle_increment && |
767 | (params->cpu_throttle_increment < 1 || | |
768 | params->cpu_throttle_increment > 99)) { | |
1626fee3 | 769 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
d85a31d1 | 770 | "cpu_throttle_increment", |
1626fee3 | 771 | "an integer in the range of 1 to 99"); |
16d063bc | 772 | return false; |
1626fee3 | 773 | } |
16d063bc | 774 | |
2ff30257 AA |
775 | if (params->has_max_bandwidth && |
776 | (params->max_bandwidth < 0 || params->max_bandwidth > SIZE_MAX)) { | |
777 | error_setg(errp, "Parameter 'max_bandwidth' expects an integer in the" | |
778 | " range of 0 to %zu bytes/second", SIZE_MAX); | |
16d063bc | 779 | return false; |
2ff30257 | 780 | } |
16d063bc | 781 | |
2ff30257 | 782 | if (params->has_downtime_limit && |
87c9cc1c DHB |
783 | (params->downtime_limit < 0 || |
784 | params->downtime_limit > MAX_MIGRATE_DOWNTIME)) { | |
785 | error_setg(errp, "Parameter 'downtime_limit' expects an integer in " | |
786 | "the range of 0 to %d milliseconds", | |
787 | MAX_MIGRATE_DOWNTIME); | |
16d063bc | 788 | return false; |
2ff30257 | 789 | } |
16d063bc | 790 | |
68b53591 HZ |
791 | if (params->has_x_checkpoint_delay && (params->x_checkpoint_delay < 0)) { |
792 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
793 | "x_checkpoint_delay", | |
794 | "is invalid, it should be positive"); | |
16d063bc PX |
795 | return false; |
796 | } | |
4075fb1c JQ |
797 | if (params->has_x_multifd_channels && |
798 | (params->x_multifd_channels < 1 || params->x_multifd_channels > 255)) { | |
799 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
800 | "multifd_channels", | |
801 | "is invalid, it should be in the range of 1 to 255"); | |
802 | return false; | |
803 | } | |
0fb86605 JQ |
804 | if (params->has_x_multifd_page_count && |
805 | (params->x_multifd_page_count < 1 || | |
806 | params->x_multifd_page_count > 10000)) { | |
807 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
808 | "multifd_page_count", | |
809 | "is invalid, it should be in the range of 1 to 10000"); | |
810 | return false; | |
811 | } | |
16d063bc PX |
812 | |
813 | return true; | |
814 | } | |
815 | ||
1bda8b3c MA |
816 | static void migrate_params_test_apply(MigrateSetParameters *params, |
817 | MigrationParameters *dest) | |
818 | { | |
819 | *dest = migrate_get_current()->parameters; | |
820 | ||
821 | /* TODO use QAPI_CLONE() instead of duplicating it inline */ | |
822 | ||
823 | if (params->has_compress_level) { | |
824 | dest->compress_level = params->compress_level; | |
825 | } | |
826 | ||
827 | if (params->has_compress_threads) { | |
828 | dest->compress_threads = params->compress_threads; | |
829 | } | |
830 | ||
831 | if (params->has_decompress_threads) { | |
832 | dest->decompress_threads = params->decompress_threads; | |
833 | } | |
834 | ||
835 | if (params->has_cpu_throttle_initial) { | |
836 | dest->cpu_throttle_initial = params->cpu_throttle_initial; | |
837 | } | |
838 | ||
839 | if (params->has_cpu_throttle_increment) { | |
840 | dest->cpu_throttle_increment = params->cpu_throttle_increment; | |
841 | } | |
842 | ||
843 | if (params->has_tls_creds) { | |
01fa5598 MA |
844 | assert(params->tls_creds->type == QTYPE_QSTRING); |
845 | dest->tls_creds = g_strdup(params->tls_creds->u.s); | |
1bda8b3c MA |
846 | } |
847 | ||
848 | if (params->has_tls_hostname) { | |
01fa5598 MA |
849 | assert(params->tls_hostname->type == QTYPE_QSTRING); |
850 | dest->tls_hostname = g_strdup(params->tls_hostname->u.s); | |
1bda8b3c MA |
851 | } |
852 | ||
853 | if (params->has_max_bandwidth) { | |
854 | dest->max_bandwidth = params->max_bandwidth; | |
855 | } | |
856 | ||
857 | if (params->has_downtime_limit) { | |
858 | dest->downtime_limit = params->downtime_limit; | |
859 | } | |
860 | ||
861 | if (params->has_x_checkpoint_delay) { | |
862 | dest->x_checkpoint_delay = params->x_checkpoint_delay; | |
863 | } | |
864 | ||
865 | if (params->has_block_incremental) { | |
866 | dest->block_incremental = params->block_incremental; | |
867 | } | |
5e7577a1 JQ |
868 | if (params->has_x_multifd_channels) { |
869 | dest->x_multifd_channels = params->x_multifd_channels; | |
870 | } | |
871 | if (params->has_x_multifd_page_count) { | |
872 | dest->x_multifd_page_count = params->x_multifd_page_count; | |
873 | } | |
1bda8b3c MA |
874 | } |
875 | ||
876 | static void migrate_params_apply(MigrateSetParameters *params) | |
16d063bc PX |
877 | { |
878 | MigrationState *s = migrate_get_current(); | |
879 | ||
e87fae4c MA |
880 | /* TODO use QAPI_CLONE() instead of duplicating it inline */ |
881 | ||
7f375e04 EB |
882 | if (params->has_compress_level) { |
883 | s->parameters.compress_level = params->compress_level; | |
85de8323 | 884 | } |
476c72aa | 885 | |
7f375e04 EB |
886 | if (params->has_compress_threads) { |
887 | s->parameters.compress_threads = params->compress_threads; | |
85de8323 | 888 | } |
476c72aa | 889 | |
7f375e04 EB |
890 | if (params->has_decompress_threads) { |
891 | s->parameters.decompress_threads = params->decompress_threads; | |
85de8323 | 892 | } |
476c72aa | 893 | |
7f375e04 EB |
894 | if (params->has_cpu_throttle_initial) { |
895 | s->parameters.cpu_throttle_initial = params->cpu_throttle_initial; | |
1626fee3 | 896 | } |
476c72aa | 897 | |
7f375e04 EB |
898 | if (params->has_cpu_throttle_increment) { |
899 | s->parameters.cpu_throttle_increment = params->cpu_throttle_increment; | |
1626fee3 | 900 | } |
476c72aa | 901 | |
7f375e04 | 902 | if (params->has_tls_creds) { |
69ef1f36 | 903 | g_free(s->parameters.tls_creds); |
01fa5598 MA |
904 | assert(params->tls_creds->type == QTYPE_QSTRING); |
905 | s->parameters.tls_creds = g_strdup(params->tls_creds->u.s); | |
69ef1f36 | 906 | } |
476c72aa | 907 | |
7f375e04 | 908 | if (params->has_tls_hostname) { |
69ef1f36 | 909 | g_free(s->parameters.tls_hostname); |
01fa5598 MA |
910 | assert(params->tls_hostname->type == QTYPE_QSTRING); |
911 | s->parameters.tls_hostname = g_strdup(params->tls_hostname->u.s); | |
69ef1f36 | 912 | } |
476c72aa | 913 | |
2ff30257 AA |
914 | if (params->has_max_bandwidth) { |
915 | s->parameters.max_bandwidth = params->max_bandwidth; | |
916 | if (s->to_dst_file) { | |
917 | qemu_file_set_rate_limit(s->to_dst_file, | |
918 | s->parameters.max_bandwidth / XFER_LIMIT_RATIO); | |
919 | } | |
920 | } | |
476c72aa | 921 | |
2ff30257 AA |
922 | if (params->has_downtime_limit) { |
923 | s->parameters.downtime_limit = params->downtime_limit; | |
924 | } | |
68b53591 HZ |
925 | |
926 | if (params->has_x_checkpoint_delay) { | |
927 | s->parameters.x_checkpoint_delay = params->x_checkpoint_delay; | |
479125d5 HZ |
928 | if (migration_in_colo_state()) { |
929 | colo_checkpoint_notify(s); | |
930 | } | |
68b53591 | 931 | } |
476c72aa | 932 | |
2833c59b JQ |
933 | if (params->has_block_incremental) { |
934 | s->parameters.block_incremental = params->block_incremental; | |
935 | } | |
4075fb1c JQ |
936 | if (params->has_x_multifd_channels) { |
937 | s->parameters.x_multifd_channels = params->x_multifd_channels; | |
938 | } | |
0fb86605 JQ |
939 | if (params->has_x_multifd_page_count) { |
940 | s->parameters.x_multifd_page_count = params->x_multifd_page_count; | |
941 | } | |
85de8323 LL |
942 | } |
943 | ||
1bda8b3c | 944 | void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp) |
476c72aa | 945 | { |
1bda8b3c MA |
946 | MigrationParameters tmp; |
947 | ||
01fa5598 MA |
948 | /* TODO Rewrite "" to null instead */ |
949 | if (params->has_tls_creds | |
950 | && params->tls_creds->type == QTYPE_QNULL) { | |
951 | QDECREF(params->tls_creds->u.n); | |
952 | params->tls_creds->type = QTYPE_QSTRING; | |
953 | params->tls_creds->u.s = strdup(""); | |
954 | } | |
955 | /* TODO Rewrite "" to null instead */ | |
956 | if (params->has_tls_hostname | |
957 | && params->tls_hostname->type == QTYPE_QNULL) { | |
958 | QDECREF(params->tls_hostname->u.n); | |
959 | params->tls_hostname->type = QTYPE_QSTRING; | |
960 | params->tls_hostname->u.s = strdup(""); | |
961 | } | |
962 | ||
1bda8b3c MA |
963 | migrate_params_test_apply(params, &tmp); |
964 | ||
965 | if (!migrate_params_check(&tmp, errp)) { | |
476c72aa PX |
966 | /* Invalid parameter */ |
967 | return; | |
968 | } | |
969 | ||
970 | migrate_params_apply(params); | |
971 | } | |
972 | ||
2594f56d | 973 | |
4886a1bc DDAG |
974 | void qmp_migrate_start_postcopy(Error **errp) |
975 | { | |
976 | MigrationState *s = migrate_get_current(); | |
977 | ||
978 | if (!migrate_postcopy_ram()) { | |
a54d340b | 979 | error_setg(errp, "Enable postcopy with migrate_set_capability before" |
4886a1bc DDAG |
980 | " the start of migration"); |
981 | return; | |
982 | } | |
983 | ||
984 | if (s->state == MIGRATION_STATUS_NONE) { | |
985 | error_setg(errp, "Postcopy must be started after migration has been" | |
986 | " started"); | |
987 | return; | |
988 | } | |
989 | /* | |
990 | * we don't error if migration has finished since that would be racy | |
991 | * with issuing this command. | |
992 | */ | |
993 | atomic_set(&s->start_postcopy, true); | |
994 | } | |
995 | ||
065e2813 AL |
996 | /* shared migration helpers */ |
997 | ||
48781e5b | 998 | void migrate_set_state(int *state, int old_state, int new_state) |
51cf4c1a | 999 | { |
a31fedee | 1000 | assert(new_state < MIGRATION_STATUS__MAX); |
48781e5b | 1001 | if (atomic_cmpxchg(state, old_state, new_state) == old_state) { |
a31fedee | 1002 | trace_migrate_set_state(MigrationStatus_str(new_state)); |
b05dc723 | 1003 | migrate_generate_event(new_state); |
51cf4c1a Z |
1004 | } |
1005 | } | |
1006 | ||
4e4a3d3a PX |
1007 | static MigrationCapabilityStatusList *migrate_cap_add( |
1008 | MigrationCapabilityStatusList *list, | |
1009 | MigrationCapability index, | |
1010 | bool state) | |
2833c59b JQ |
1011 | { |
1012 | MigrationCapabilityStatusList *cap; | |
1013 | ||
1014 | cap = g_new0(MigrationCapabilityStatusList, 1); | |
1015 | cap->value = g_new0(MigrationCapabilityStatus, 1); | |
4e4a3d3a PX |
1016 | cap->value->capability = index; |
1017 | cap->value->state = state; | |
1018 | cap->next = list; | |
1019 | ||
1020 | return cap; | |
1021 | } | |
1022 | ||
1023 | void migrate_set_block_enabled(bool value, Error **errp) | |
1024 | { | |
1025 | MigrationCapabilityStatusList *cap; | |
1026 | ||
1027 | cap = migrate_cap_add(NULL, MIGRATION_CAPABILITY_BLOCK, value); | |
2833c59b JQ |
1028 | qmp_migrate_set_capabilities(cap, errp); |
1029 | qapi_free_MigrationCapabilityStatusList(cap); | |
1030 | } | |
1031 | ||
1032 | static void migrate_set_block_incremental(MigrationState *s, bool value) | |
1033 | { | |
1034 | s->parameters.block_incremental = value; | |
1035 | } | |
1036 | ||
1037 | static void block_cleanup_parameters(MigrationState *s) | |
1038 | { | |
1039 | if (s->must_remove_block_options) { | |
1040 | /* setting to false can never fail */ | |
1041 | migrate_set_block_enabled(false, &error_abort); | |
1042 | migrate_set_block_incremental(s, false); | |
1043 | s->must_remove_block_options = false; | |
1044 | } | |
1045 | } | |
1046 | ||
bb1fadc4 | 1047 | static void migrate_fd_cleanup(void *opaque) |
065e2813 | 1048 | { |
bb1fadc4 PB |
1049 | MigrationState *s = opaque; |
1050 | ||
1051 | qemu_bh_delete(s->cleanup_bh); | |
1052 | s->cleanup_bh = NULL; | |
1053 | ||
89a02a9f | 1054 | if (s->to_dst_file) { |
f986c3d2 JQ |
1055 | Error *local_err = NULL; |
1056 | ||
9013dca5 | 1057 | trace_migrate_fd_cleanup(); |
404a7c05 | 1058 | qemu_mutex_unlock_iothread(); |
1d34e4bf DDAG |
1059 | if (s->migration_thread_running) { |
1060 | qemu_thread_join(&s->thread); | |
1061 | s->migration_thread_running = false; | |
1062 | } | |
404a7c05 PB |
1063 | qemu_mutex_lock_iothread(); |
1064 | ||
f986c3d2 JQ |
1065 | if (multifd_save_cleanup(&local_err) != 0) { |
1066 | error_report_err(local_err); | |
1067 | } | |
89a02a9f HZ |
1068 | qemu_fclose(s->to_dst_file); |
1069 | s->to_dst_file = NULL; | |
065e2813 AL |
1070 | } |
1071 | ||
9ec055ae DDAG |
1072 | assert((s->state != MIGRATION_STATUS_ACTIVE) && |
1073 | (s->state != MIGRATION_STATUS_POSTCOPY_ACTIVE)); | |
7a2c1721 | 1074 | |
94f5a437 | 1075 | if (s->state == MIGRATION_STATUS_CANCELLING) { |
48781e5b | 1076 | migrate_set_state(&s->state, MIGRATION_STATUS_CANCELLING, |
94f5a437 | 1077 | MIGRATION_STATUS_CANCELLED); |
7a2c1721 | 1078 | } |
a3fa1d78 PB |
1079 | |
1080 | notifier_list_notify(&migration_state_notifiers, s); | |
2833c59b | 1081 | block_cleanup_parameters(s); |
065e2813 AL |
1082 | } |
1083 | ||
d59ce6f3 | 1084 | void migrate_fd_error(MigrationState *s, const Error *error) |
065e2813 | 1085 | { |
25174055 | 1086 | trace_migrate_fd_error(error_get_pretty(error)); |
89a02a9f | 1087 | assert(s->to_dst_file == NULL); |
48781e5b HZ |
1088 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
1089 | MIGRATION_STATUS_FAILED); | |
d59ce6f3 DB |
1090 | if (!s->error) { |
1091 | s->error = error_copy(error); | |
1092 | } | |
bb1fadc4 | 1093 | notifier_list_notify(&migration_state_notifiers, s); |
2833c59b | 1094 | block_cleanup_parameters(s); |
458cf28e JQ |
1095 | } |
1096 | ||
0edda1c4 | 1097 | static void migrate_fd_cancel(MigrationState *s) |
065e2813 | 1098 | { |
6f2b811a | 1099 | int old_state ; |
89a02a9f | 1100 | QEMUFile *f = migrate_get_current()->to_dst_file; |
9013dca5 | 1101 | trace_migrate_fd_cancel(); |
065e2813 | 1102 | |
70b20477 DDAG |
1103 | if (s->rp_state.from_dst_file) { |
1104 | /* shutdown the rp socket, so causing the rp thread to shutdown */ | |
1105 | qemu_file_shutdown(s->rp_state.from_dst_file); | |
1106 | } | |
1107 | ||
6f2b811a Z |
1108 | do { |
1109 | old_state = s->state; | |
f6844b99 | 1110 | if (!migration_is_setup_or_active(old_state)) { |
6f2b811a Z |
1111 | break; |
1112 | } | |
48781e5b | 1113 | migrate_set_state(&s->state, old_state, MIGRATION_STATUS_CANCELLING); |
31194731 | 1114 | } while (s->state != MIGRATION_STATUS_CANCELLING); |
a26ba26e DDAG |
1115 | |
1116 | /* | |
1117 | * If we're unlucky the migration code might be stuck somewhere in a | |
1118 | * send/write while the network has failed and is waiting to timeout; | |
1119 | * if we've got shutdown(2) available then we can force it to quit. | |
1120 | * The outgoing qemu file gets closed in migrate_fd_cleanup that is | |
1121 | * called in a bh, so there is no race against this cancel. | |
1122 | */ | |
31194731 | 1123 | if (s->state == MIGRATION_STATUS_CANCELLING && f) { |
a26ba26e DDAG |
1124 | qemu_file_shutdown(f); |
1125 | } | |
1d2acc31 HZ |
1126 | if (s->state == MIGRATION_STATUS_CANCELLING && s->block_inactive) { |
1127 | Error *local_err = NULL; | |
1128 | ||
1129 | bdrv_invalidate_cache_all(&local_err); | |
1130 | if (local_err) { | |
1131 | error_report_err(local_err); | |
1132 | } else { | |
1133 | s->block_inactive = false; | |
1134 | } | |
1135 | } | |
2833c59b | 1136 | block_cleanup_parameters(s); |
065e2813 AL |
1137 | } |
1138 | ||
99a0db9b GH |
1139 | void add_migration_state_change_notifier(Notifier *notify) |
1140 | { | |
1141 | notifier_list_add(&migration_state_notifiers, notify); | |
1142 | } | |
1143 | ||
1144 | void remove_migration_state_change_notifier(Notifier *notify) | |
1145 | { | |
31552529 | 1146 | notifier_remove(notify); |
99a0db9b GH |
1147 | } |
1148 | ||
02edd2e7 | 1149 | bool migration_in_setup(MigrationState *s) |
afe2df69 | 1150 | { |
31194731 | 1151 | return s->state == MIGRATION_STATUS_SETUP; |
afe2df69 GH |
1152 | } |
1153 | ||
7073693b | 1154 | bool migration_has_finished(MigrationState *s) |
99a0db9b | 1155 | { |
31194731 | 1156 | return s->state == MIGRATION_STATUS_COMPLETED; |
99a0db9b | 1157 | } |
0edda1c4 | 1158 | |
afe2df69 GH |
1159 | bool migration_has_failed(MigrationState *s) |
1160 | { | |
31194731 HZ |
1161 | return (s->state == MIGRATION_STATUS_CANCELLED || |
1162 | s->state == MIGRATION_STATUS_FAILED); | |
afe2df69 GH |
1163 | } |
1164 | ||
5727309d | 1165 | bool migration_in_postcopy(void) |
9ec055ae | 1166 | { |
5727309d JQ |
1167 | MigrationState *s = migrate_get_current(); |
1168 | ||
9ec055ae DDAG |
1169 | return (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE); |
1170 | } | |
1171 | ||
b82fc321 DDAG |
1172 | bool migration_in_postcopy_after_devices(MigrationState *s) |
1173 | { | |
5727309d | 1174 | return migration_in_postcopy() && s->postcopy_after_devices; |
b82fc321 DDAG |
1175 | } |
1176 | ||
fab35005 | 1177 | bool migration_is_idle(void) |
fe44dc91 | 1178 | { |
fab35005 | 1179 | MigrationState *s = migrate_get_current(); |
fe44dc91 AA |
1180 | |
1181 | switch (s->state) { | |
1182 | case MIGRATION_STATUS_NONE: | |
1183 | case MIGRATION_STATUS_CANCELLED: | |
1184 | case MIGRATION_STATUS_COMPLETED: | |
1185 | case MIGRATION_STATUS_FAILED: | |
1186 | return true; | |
1187 | case MIGRATION_STATUS_SETUP: | |
1188 | case MIGRATION_STATUS_CANCELLING: | |
1189 | case MIGRATION_STATUS_ACTIVE: | |
1190 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: | |
1191 | case MIGRATION_STATUS_COLO: | |
1192 | return false; | |
1193 | case MIGRATION_STATUS__MAX: | |
1194 | g_assert_not_reached(); | |
1195 | } | |
1196 | ||
1197 | return false; | |
1198 | } | |
1199 | ||
a0762d9e | 1200 | MigrationState *migrate_init(void) |
0edda1c4 | 1201 | { |
17549e84 | 1202 | MigrationState *s = migrate_get_current(); |
bbf6da32 | 1203 | |
389775d1 DDAG |
1204 | /* |
1205 | * Reinitialise all migration state, except | |
1206 | * parameters/capabilities that the user set, and | |
1207 | * locks. | |
1208 | */ | |
1209 | s->bytes_xfer = 0; | |
1210 | s->xfer_limit = 0; | |
1211 | s->cleanup_bh = 0; | |
89a02a9f | 1212 | s->to_dst_file = NULL; |
389775d1 | 1213 | s->state = MIGRATION_STATUS_NONE; |
389775d1 DDAG |
1214 | s->rp_state.from_dst_file = NULL; |
1215 | s->rp_state.error = false; | |
1216 | s->mbps = 0.0; | |
1217 | s->downtime = 0; | |
1218 | s->expected_downtime = 0; | |
389775d1 | 1219 | s->setup_time = 0; |
389775d1 | 1220 | s->start_postcopy = false; |
b82fc321 | 1221 | s->postcopy_after_devices = false; |
389775d1 | 1222 | s->migration_thread_running = false; |
d59ce6f3 DB |
1223 | error_free(s->error); |
1224 | s->error = NULL; | |
389775d1 | 1225 | |
48781e5b | 1226 | migrate_set_state(&s->state, MIGRATION_STATUS_NONE, MIGRATION_STATUS_SETUP); |
0edda1c4 | 1227 | |
bc72ad67 | 1228 | s->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0edda1c4 JQ |
1229 | return s; |
1230 | } | |
cab30143 | 1231 | |
fa2756b7 AL |
1232 | static GSList *migration_blockers; |
1233 | ||
fe44dc91 | 1234 | int migrate_add_blocker(Error *reason, Error **errp) |
fa2756b7 | 1235 | { |
3df663e5 | 1236 | if (migrate_get_current()->only_migratable) { |
b67b8c3a AA |
1237 | error_propagate(errp, error_copy(reason)); |
1238 | error_prepend(errp, "disallowing migration blocker " | |
1239 | "(--only_migratable) for: "); | |
1240 | return -EACCES; | |
1241 | } | |
1242 | ||
fab35005 | 1243 | if (migration_is_idle()) { |
fe44dc91 AA |
1244 | migration_blockers = g_slist_prepend(migration_blockers, reason); |
1245 | return 0; | |
1246 | } | |
1247 | ||
1248 | error_propagate(errp, error_copy(reason)); | |
1249 | error_prepend(errp, "disallowing migration blocker (migration in " | |
1250 | "progress) for: "); | |
1251 | return -EBUSY; | |
fa2756b7 AL |
1252 | } |
1253 | ||
1254 | void migrate_del_blocker(Error *reason) | |
1255 | { | |
1256 | migration_blockers = g_slist_remove(migration_blockers, reason); | |
1257 | } | |
1258 | ||
bf1ae1f4 DDAG |
1259 | void qmp_migrate_incoming(const char *uri, Error **errp) |
1260 | { | |
1261 | Error *local_err = NULL; | |
4debb5f5 | 1262 | static bool once = true; |
bf1ae1f4 DDAG |
1263 | |
1264 | if (!deferred_incoming) { | |
4debb5f5 | 1265 | error_setg(errp, "For use with '-incoming defer'"); |
bf1ae1f4 DDAG |
1266 | return; |
1267 | } | |
4debb5f5 DDAG |
1268 | if (!once) { |
1269 | error_setg(errp, "The incoming migration has already been started"); | |
1270 | } | |
bf1ae1f4 DDAG |
1271 | |
1272 | qemu_start_incoming_migration(uri, &local_err); | |
1273 | ||
1274 | if (local_err) { | |
1275 | error_propagate(errp, local_err); | |
1276 | return; | |
1277 | } | |
1278 | ||
4debb5f5 | 1279 | once = false; |
bf1ae1f4 DDAG |
1280 | } |
1281 | ||
24f3902b GK |
1282 | bool migration_is_blocked(Error **errp) |
1283 | { | |
1284 | if (qemu_savevm_state_blocked(errp)) { | |
1285 | return true; | |
1286 | } | |
1287 | ||
1288 | if (migration_blockers) { | |
250561e1 | 1289 | error_propagate(errp, error_copy(migration_blockers->data)); |
24f3902b GK |
1290 | return true; |
1291 | } | |
1292 | ||
1293 | return false; | |
1294 | } | |
1295 | ||
e1c37d0e LC |
1296 | void qmp_migrate(const char *uri, bool has_blk, bool blk, |
1297 | bool has_inc, bool inc, bool has_detach, bool detach, | |
1298 | Error **errp) | |
cab30143 | 1299 | { |
be7059cd | 1300 | Error *local_err = NULL; |
17549e84 | 1301 | MigrationState *s = migrate_get_current(); |
cab30143 | 1302 | const char *p; |
cab30143 | 1303 | |
f6844b99 | 1304 | if (migration_is_setup_or_active(s->state) || |
0b827d5e HZ |
1305 | s->state == MIGRATION_STATUS_CANCELLING || |
1306 | s->state == MIGRATION_STATUS_COLO) { | |
c6bd8c70 | 1307 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
e1c37d0e | 1308 | return; |
cab30143 | 1309 | } |
ca99993a DDAG |
1310 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
1311 | error_setg(errp, "Guest is waiting for an incoming migration"); | |
1312 | return; | |
1313 | } | |
1314 | ||
24f3902b | 1315 | if (migration_is_blocked(errp)) { |
e1c37d0e | 1316 | return; |
fa2756b7 AL |
1317 | } |
1318 | ||
2833c59b JQ |
1319 | if ((has_blk && blk) || (has_inc && inc)) { |
1320 | if (migrate_use_block() || migrate_use_block_incremental()) { | |
1321 | error_setg(errp, "Command options are incompatible with " | |
1322 | "current migration capabilities"); | |
1323 | return; | |
1324 | } | |
1325 | migrate_set_block_enabled(true, &local_err); | |
1326 | if (local_err) { | |
1327 | error_propagate(errp, local_err); | |
1328 | return; | |
1329 | } | |
1330 | s->must_remove_block_options = true; | |
1331 | } | |
1332 | ||
1333 | if (has_inc && inc) { | |
1334 | migrate_set_block_incremental(s, true); | |
1335 | } | |
1336 | ||
a0762d9e | 1337 | s = migrate_init(); |
cab30143 JQ |
1338 | |
1339 | if (strstart(uri, "tcp:", &p)) { | |
f37afb5a | 1340 | tcp_start_outgoing_migration(s, p, &local_err); |
2da776db | 1341 | #ifdef CONFIG_RDMA |
41310c68 | 1342 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
1343 | rdma_start_outgoing_migration(s, p, &local_err); |
1344 | #endif | |
cab30143 | 1345 | } else if (strstart(uri, "exec:", &p)) { |
f37afb5a | 1346 | exec_start_outgoing_migration(s, p, &local_err); |
cab30143 | 1347 | } else if (strstart(uri, "unix:", &p)) { |
f37afb5a | 1348 | unix_start_outgoing_migration(s, p, &local_err); |
cab30143 | 1349 | } else if (strstart(uri, "fd:", &p)) { |
f37afb5a | 1350 | fd_start_outgoing_migration(s, p, &local_err); |
99a0db9b | 1351 | } else { |
c6bd8c70 MA |
1352 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "uri", |
1353 | "a valid migration protocol"); | |
48781e5b HZ |
1354 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
1355 | MIGRATION_STATUS_FAILED); | |
e1c37d0e | 1356 | return; |
cab30143 JQ |
1357 | } |
1358 | ||
f37afb5a | 1359 | if (local_err) { |
d59ce6f3 | 1360 | migrate_fd_error(s, local_err); |
f37afb5a | 1361 | error_propagate(errp, local_err); |
e1c37d0e | 1362 | return; |
1299c631 | 1363 | } |
cab30143 JQ |
1364 | } |
1365 | ||
6cdedb07 | 1366 | void qmp_migrate_cancel(Error **errp) |
cab30143 | 1367 | { |
17549e84 | 1368 | migrate_fd_cancel(migrate_get_current()); |
cab30143 JQ |
1369 | } |
1370 | ||
9e1ba4cc OW |
1371 | void qmp_migrate_set_cache_size(int64_t value, Error **errp) |
1372 | { | |
1373 | MigrationState *s = migrate_get_current(); | |
c91e681a | 1374 | int64_t new_size; |
9e1ba4cc | 1375 | |
8acabf69 | 1376 | new_size = xbzrle_cache_resize(value, errp); |
c91e681a | 1377 | if (new_size < 0) { |
c91e681a OW |
1378 | return; |
1379 | } | |
1380 | ||
1381 | s->xbzrle_cache_size = new_size; | |
9e1ba4cc OW |
1382 | } |
1383 | ||
1384 | int64_t qmp_query_migrate_cache_size(Error **errp) | |
1385 | { | |
1386 | return migrate_xbzrle_cache_size(); | |
1387 | } | |
1388 | ||
3dc85383 | 1389 | void qmp_migrate_set_speed(int64_t value, Error **errp) |
cab30143 | 1390 | { |
1bda8b3c | 1391 | MigrateSetParameters p = { |
2ff30257 AA |
1392 | .has_max_bandwidth = true, |
1393 | .max_bandwidth = value, | |
1394 | }; | |
cab30143 | 1395 | |
2ff30257 | 1396 | qmp_migrate_set_parameters(&p, errp); |
cab30143 JQ |
1397 | } |
1398 | ||
4f0a993b | 1399 | void qmp_migrate_set_downtime(double value, Error **errp) |
cab30143 | 1400 | { |
87c9cc1c DHB |
1401 | if (value < 0 || value > MAX_MIGRATE_DOWNTIME_SECONDS) { |
1402 | error_setg(errp, "Parameter 'downtime_limit' expects an integer in " | |
1403 | "the range of 0 to %d seconds", | |
1404 | MAX_MIGRATE_DOWNTIME_SECONDS); | |
1405 | return; | |
1406 | } | |
1407 | ||
2ff30257 AA |
1408 | value *= 1000; /* Convert to milliseconds */ |
1409 | value = MAX(0, MIN(INT64_MAX, value)); | |
1410 | ||
1bda8b3c | 1411 | MigrateSetParameters p = { |
2ff30257 AA |
1412 | .has_downtime_limit = true, |
1413 | .downtime_limit = value, | |
1414 | }; | |
1415 | ||
1416 | qmp_migrate_set_parameters(&p, errp); | |
99a0db9b | 1417 | } |
17ad9b35 | 1418 | |
53f09a10 PB |
1419 | bool migrate_release_ram(void) |
1420 | { | |
1421 | MigrationState *s; | |
1422 | ||
1423 | s = migrate_get_current(); | |
1424 | ||
1425 | return s->enabled_capabilities[MIGRATION_CAPABILITY_RELEASE_RAM]; | |
1426 | } | |
1427 | ||
53dd370c DDAG |
1428 | bool migrate_postcopy_ram(void) |
1429 | { | |
1430 | MigrationState *s; | |
1431 | ||
1432 | s = migrate_get_current(); | |
1433 | ||
32c3db5b | 1434 | return s->enabled_capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM]; |
53dd370c DDAG |
1435 | } |
1436 | ||
58110f0a VSO |
1437 | bool migrate_postcopy(void) |
1438 | { | |
1439 | return migrate_postcopy_ram(); | |
1440 | } | |
1441 | ||
bde1e2ec CV |
1442 | bool migrate_auto_converge(void) |
1443 | { | |
1444 | MigrationState *s; | |
1445 | ||
1446 | s = migrate_get_current(); | |
1447 | ||
1448 | return s->enabled_capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; | |
1449 | } | |
1450 | ||
323004a3 PL |
1451 | bool migrate_zero_blocks(void) |
1452 | { | |
1453 | MigrationState *s; | |
1454 | ||
1455 | s = migrate_get_current(); | |
1456 | ||
1457 | return s->enabled_capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS]; | |
1458 | } | |
1459 | ||
8706d2d5 LL |
1460 | bool migrate_use_compression(void) |
1461 | { | |
dde4e694 LL |
1462 | MigrationState *s; |
1463 | ||
1464 | s = migrate_get_current(); | |
1465 | ||
1466 | return s->enabled_capabilities[MIGRATION_CAPABILITY_COMPRESS]; | |
8706d2d5 LL |
1467 | } |
1468 | ||
1469 | int migrate_compress_level(void) | |
1470 | { | |
1471 | MigrationState *s; | |
1472 | ||
1473 | s = migrate_get_current(); | |
1474 | ||
2594f56d | 1475 | return s->parameters.compress_level; |
8706d2d5 LL |
1476 | } |
1477 | ||
1478 | int migrate_compress_threads(void) | |
1479 | { | |
1480 | MigrationState *s; | |
1481 | ||
1482 | s = migrate_get_current(); | |
1483 | ||
2594f56d | 1484 | return s->parameters.compress_threads; |
8706d2d5 LL |
1485 | } |
1486 | ||
3fcb38c2 LL |
1487 | int migrate_decompress_threads(void) |
1488 | { | |
1489 | MigrationState *s; | |
1490 | ||
1491 | s = migrate_get_current(); | |
1492 | ||
2594f56d | 1493 | return s->parameters.decompress_threads; |
3fcb38c2 LL |
1494 | } |
1495 | ||
b05dc723 JQ |
1496 | bool migrate_use_events(void) |
1497 | { | |
1498 | MigrationState *s; | |
1499 | ||
1500 | s = migrate_get_current(); | |
1501 | ||
1502 | return s->enabled_capabilities[MIGRATION_CAPABILITY_EVENTS]; | |
1503 | } | |
1504 | ||
30126bbf JQ |
1505 | bool migrate_use_multifd(void) |
1506 | { | |
1507 | MigrationState *s; | |
1508 | ||
1509 | s = migrate_get_current(); | |
1510 | ||
1511 | return s->enabled_capabilities[MIGRATION_CAPABILITY_X_MULTIFD]; | |
1512 | } | |
1513 | ||
4075fb1c JQ |
1514 | int migrate_multifd_channels(void) |
1515 | { | |
1516 | MigrationState *s; | |
1517 | ||
1518 | s = migrate_get_current(); | |
1519 | ||
1520 | return s->parameters.x_multifd_channels; | |
1521 | } | |
1522 | ||
0fb86605 JQ |
1523 | int migrate_multifd_page_count(void) |
1524 | { | |
1525 | MigrationState *s; | |
1526 | ||
1527 | s = migrate_get_current(); | |
1528 | ||
1529 | return s->parameters.x_multifd_page_count; | |
1530 | } | |
1531 | ||
17ad9b35 OW |
1532 | int migrate_use_xbzrle(void) |
1533 | { | |
1534 | MigrationState *s; | |
1535 | ||
1536 | s = migrate_get_current(); | |
1537 | ||
1538 | return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE]; | |
1539 | } | |
1540 | ||
1541 | int64_t migrate_xbzrle_cache_size(void) | |
1542 | { | |
1543 | MigrationState *s; | |
1544 | ||
1545 | s = migrate_get_current(); | |
1546 | ||
1547 | return s->xbzrle_cache_size; | |
1548 | } | |
0d82d0e8 | 1549 | |
2833c59b JQ |
1550 | bool migrate_use_block(void) |
1551 | { | |
1552 | MigrationState *s; | |
1553 | ||
1554 | s = migrate_get_current(); | |
1555 | ||
1556 | return s->enabled_capabilities[MIGRATION_CAPABILITY_BLOCK]; | |
1557 | } | |
1558 | ||
c788ada8 PX |
1559 | bool migrate_use_return_path(void) |
1560 | { | |
1561 | MigrationState *s; | |
1562 | ||
1563 | s = migrate_get_current(); | |
1564 | ||
1565 | return s->enabled_capabilities[MIGRATION_CAPABILITY_RETURN_PATH]; | |
1566 | } | |
1567 | ||
2833c59b JQ |
1568 | bool migrate_use_block_incremental(void) |
1569 | { | |
1570 | MigrationState *s; | |
1571 | ||
1572 | s = migrate_get_current(); | |
1573 | ||
1574 | return s->parameters.block_incremental; | |
1575 | } | |
1576 | ||
70b20477 DDAG |
1577 | /* migration thread support */ |
1578 | /* | |
1579 | * Something bad happened to the RP stream, mark an error | |
1580 | * The caller shall print or trace something to indicate why | |
1581 | */ | |
1582 | static void mark_source_rp_bad(MigrationState *s) | |
1583 | { | |
1584 | s->rp_state.error = true; | |
1585 | } | |
1586 | ||
1587 | static struct rp_cmd_args { | |
1588 | ssize_t len; /* -1 = variable */ | |
1589 | const char *name; | |
1590 | } rp_cmd_args[] = { | |
1591 | [MIG_RP_MSG_INVALID] = { .len = -1, .name = "INVALID" }, | |
1592 | [MIG_RP_MSG_SHUT] = { .len = 4, .name = "SHUT" }, | |
1593 | [MIG_RP_MSG_PONG] = { .len = 4, .name = "PONG" }, | |
1e2d90eb DDAG |
1594 | [MIG_RP_MSG_REQ_PAGES] = { .len = 12, .name = "REQ_PAGES" }, |
1595 | [MIG_RP_MSG_REQ_PAGES_ID] = { .len = -1, .name = "REQ_PAGES_ID" }, | |
70b20477 DDAG |
1596 | [MIG_RP_MSG_MAX] = { .len = -1, .name = "MAX" }, |
1597 | }; | |
1598 | ||
1e2d90eb DDAG |
1599 | /* |
1600 | * Process a request for pages received on the return path, | |
1601 | * We're allowed to send more than requested (e.g. to round to our page size) | |
1602 | * and we don't need to send pages that have already been sent. | |
1603 | */ | |
1604 | static void migrate_handle_rp_req_pages(MigrationState *ms, const char* rbname, | |
1605 | ram_addr_t start, size_t len) | |
1606 | { | |
6c595cde DDAG |
1607 | long our_host_ps = getpagesize(); |
1608 | ||
1e2d90eb | 1609 | trace_migrate_handle_rp_req_pages(rbname, start, len); |
6c595cde DDAG |
1610 | |
1611 | /* | |
1612 | * Since we currently insist on matching page sizes, just sanity check | |
1613 | * we're being asked for whole host pages. | |
1614 | */ | |
1615 | if (start & (our_host_ps-1) || | |
1616 | (len & (our_host_ps-1))) { | |
1617 | error_report("%s: Misaligned page request, start: " RAM_ADDR_FMT | |
1618 | " len: %zd", __func__, start, len); | |
1619 | mark_source_rp_bad(ms); | |
1620 | return; | |
1621 | } | |
1622 | ||
96506894 | 1623 | if (ram_save_queue_pages(rbname, start, len)) { |
6c595cde DDAG |
1624 | mark_source_rp_bad(ms); |
1625 | } | |
1e2d90eb DDAG |
1626 | } |
1627 | ||
70b20477 DDAG |
1628 | /* |
1629 | * Handles messages sent on the return path towards the source VM | |
1630 | * | |
1631 | */ | |
1632 | static void *source_return_path_thread(void *opaque) | |
1633 | { | |
1634 | MigrationState *ms = opaque; | |
1635 | QEMUFile *rp = ms->rp_state.from_dst_file; | |
1636 | uint16_t header_len, header_type; | |
568b01ca | 1637 | uint8_t buf[512]; |
70b20477 | 1638 | uint32_t tmp32, sibling_error; |
1e2d90eb DDAG |
1639 | ram_addr_t start = 0; /* =0 to silence warning */ |
1640 | size_t len = 0, expected_len; | |
70b20477 DDAG |
1641 | int res; |
1642 | ||
1643 | trace_source_return_path_thread_entry(); | |
1644 | while (!ms->rp_state.error && !qemu_file_get_error(rp) && | |
1645 | migration_is_setup_or_active(ms->state)) { | |
1646 | trace_source_return_path_thread_loop_top(); | |
1647 | header_type = qemu_get_be16(rp); | |
1648 | header_len = qemu_get_be16(rp); | |
1649 | ||
1650 | if (header_type >= MIG_RP_MSG_MAX || | |
1651 | header_type == MIG_RP_MSG_INVALID) { | |
1652 | error_report("RP: Received invalid message 0x%04x length 0x%04x", | |
1653 | header_type, header_len); | |
1654 | mark_source_rp_bad(ms); | |
1655 | goto out; | |
1656 | } | |
1657 | ||
1658 | if ((rp_cmd_args[header_type].len != -1 && | |
1659 | header_len != rp_cmd_args[header_type].len) || | |
568b01ca | 1660 | header_len > sizeof(buf)) { |
70b20477 DDAG |
1661 | error_report("RP: Received '%s' message (0x%04x) with" |
1662 | "incorrect length %d expecting %zu", | |
1663 | rp_cmd_args[header_type].name, header_type, header_len, | |
1664 | (size_t)rp_cmd_args[header_type].len); | |
1665 | mark_source_rp_bad(ms); | |
1666 | goto out; | |
1667 | } | |
1668 | ||
1669 | /* We know we've got a valid header by this point */ | |
1670 | res = qemu_get_buffer(rp, buf, header_len); | |
1671 | if (res != header_len) { | |
1672 | error_report("RP: Failed reading data for message 0x%04x" | |
1673 | " read %d expected %d", | |
1674 | header_type, res, header_len); | |
1675 | mark_source_rp_bad(ms); | |
1676 | goto out; | |
1677 | } | |
1678 | ||
1679 | /* OK, we have the message and the data */ | |
1680 | switch (header_type) { | |
1681 | case MIG_RP_MSG_SHUT: | |
4d885131 | 1682 | sibling_error = ldl_be_p(buf); |
70b20477 DDAG |
1683 | trace_source_return_path_thread_shut(sibling_error); |
1684 | if (sibling_error) { | |
1685 | error_report("RP: Sibling indicated error %d", sibling_error); | |
1686 | mark_source_rp_bad(ms); | |
1687 | } | |
1688 | /* | |
1689 | * We'll let the main thread deal with closing the RP | |
1690 | * we could do a shutdown(2) on it, but we're the only user | |
1691 | * anyway, so there's nothing gained. | |
1692 | */ | |
1693 | goto out; | |
1694 | ||
1695 | case MIG_RP_MSG_PONG: | |
4d885131 | 1696 | tmp32 = ldl_be_p(buf); |
70b20477 DDAG |
1697 | trace_source_return_path_thread_pong(tmp32); |
1698 | break; | |
1699 | ||
1e2d90eb | 1700 | case MIG_RP_MSG_REQ_PAGES: |
4d885131 PM |
1701 | start = ldq_be_p(buf); |
1702 | len = ldl_be_p(buf + 8); | |
1e2d90eb DDAG |
1703 | migrate_handle_rp_req_pages(ms, NULL, start, len); |
1704 | break; | |
1705 | ||
1706 | case MIG_RP_MSG_REQ_PAGES_ID: | |
1707 | expected_len = 12 + 1; /* header + termination */ | |
1708 | ||
1709 | if (header_len >= expected_len) { | |
4d885131 PM |
1710 | start = ldq_be_p(buf); |
1711 | len = ldl_be_p(buf + 8); | |
1e2d90eb DDAG |
1712 | /* Now we expect an idstr */ |
1713 | tmp32 = buf[12]; /* Length of the following idstr */ | |
1714 | buf[13 + tmp32] = '\0'; | |
1715 | expected_len += tmp32; | |
1716 | } | |
1717 | if (header_len != expected_len) { | |
1718 | error_report("RP: Req_Page_id with length %d expecting %zd", | |
1719 | header_len, expected_len); | |
1720 | mark_source_rp_bad(ms); | |
1721 | goto out; | |
1722 | } | |
1723 | migrate_handle_rp_req_pages(ms, (char *)&buf[13], start, len); | |
1724 | break; | |
1725 | ||
70b20477 DDAG |
1726 | default: |
1727 | break; | |
1728 | } | |
1729 | } | |
5df5416e | 1730 | if (qemu_file_get_error(rp)) { |
70b20477 DDAG |
1731 | trace_source_return_path_thread_bad_end(); |
1732 | mark_source_rp_bad(ms); | |
1733 | } | |
1734 | ||
1735 | trace_source_return_path_thread_end(); | |
1736 | out: | |
1737 | ms->rp_state.from_dst_file = NULL; | |
1738 | qemu_fclose(rp); | |
1739 | return NULL; | |
1740 | } | |
1741 | ||
70b20477 DDAG |
1742 | static int open_return_path_on_source(MigrationState *ms) |
1743 | { | |
1744 | ||
89a02a9f | 1745 | ms->rp_state.from_dst_file = qemu_file_get_return_path(ms->to_dst_file); |
70b20477 DDAG |
1746 | if (!ms->rp_state.from_dst_file) { |
1747 | return -1; | |
1748 | } | |
1749 | ||
1750 | trace_open_return_path_on_source(); | |
1751 | qemu_thread_create(&ms->rp_state.rp_thread, "return path", | |
1752 | source_return_path_thread, ms, QEMU_THREAD_JOINABLE); | |
1753 | ||
1754 | trace_open_return_path_on_source_continue(); | |
1755 | ||
1756 | return 0; | |
1757 | } | |
1758 | ||
70b20477 DDAG |
1759 | /* Returns 0 if the RP was ok, otherwise there was an error on the RP */ |
1760 | static int await_return_path_close_on_source(MigrationState *ms) | |
1761 | { | |
1762 | /* | |
1763 | * If this is a normal exit then the destination will send a SHUT and the | |
1764 | * rp_thread will exit, however if there's an error we need to cause | |
1765 | * it to exit. | |
1766 | */ | |
89a02a9f | 1767 | if (qemu_file_get_error(ms->to_dst_file) && ms->rp_state.from_dst_file) { |
70b20477 DDAG |
1768 | /* |
1769 | * shutdown(2), if we have it, will cause it to unblock if it's stuck | |
1770 | * waiting for the destination. | |
1771 | */ | |
1772 | qemu_file_shutdown(ms->rp_state.from_dst_file); | |
1773 | mark_source_rp_bad(ms); | |
1774 | } | |
1775 | trace_await_return_path_close_on_source_joining(); | |
1776 | qemu_thread_join(&ms->rp_state.rp_thread); | |
1777 | trace_await_return_path_close_on_source_close(); | |
1778 | return ms->rp_state.error; | |
1779 | } | |
1780 | ||
1d34e4bf DDAG |
1781 | /* |
1782 | * Switch from normal iteration to postcopy | |
1783 | * Returns non-0 on error | |
1784 | */ | |
1785 | static int postcopy_start(MigrationState *ms, bool *old_vm_running) | |
1786 | { | |
1787 | int ret; | |
61b67d47 DB |
1788 | QIOChannelBuffer *bioc; |
1789 | QEMUFile *fb; | |
1d34e4bf | 1790 | int64_t time_at_stop = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
ef8d6488 | 1791 | bool restart_block = false; |
48781e5b | 1792 | migrate_set_state(&ms->state, MIGRATION_STATUS_ACTIVE, |
1d34e4bf DDAG |
1793 | MIGRATION_STATUS_POSTCOPY_ACTIVE); |
1794 | ||
1795 | trace_postcopy_start(); | |
1796 | qemu_mutex_lock_iothread(); | |
1797 | trace_postcopy_start_set_run(); | |
1798 | ||
1799 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER); | |
1800 | *old_vm_running = runstate_is_running(); | |
1801 | global_state_store(); | |
1802 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); | |
76b1c7fe KW |
1803 | if (ret < 0) { |
1804 | goto fail; | |
1805 | } | |
1d34e4bf | 1806 | |
76b1c7fe | 1807 | ret = bdrv_inactivate_all(); |
1d34e4bf DDAG |
1808 | if (ret < 0) { |
1809 | goto fail; | |
1810 | } | |
ef8d6488 | 1811 | restart_block = true; |
1d34e4bf | 1812 | |
1c0d249d DDAG |
1813 | /* |
1814 | * Cause any non-postcopiable, but iterative devices to | |
1815 | * send out their final data. | |
1816 | */ | |
a1fbe750 | 1817 | qemu_savevm_state_complete_precopy(ms->to_dst_file, true, false); |
1c0d249d | 1818 | |
1d34e4bf DDAG |
1819 | /* |
1820 | * in Finish migrate and with the io-lock held everything should | |
1821 | * be quiet, but we've potentially still got dirty pages and we | |
1822 | * need to tell the destination to throw any pages it's already received | |
1823 | * that are dirty | |
1824 | */ | |
58110f0a VSO |
1825 | if (migrate_postcopy_ram()) { |
1826 | if (ram_postcopy_send_discard_bitmap(ms)) { | |
1827 | error_report("postcopy send discard bitmap failed"); | |
1828 | goto fail; | |
1829 | } | |
1d34e4bf DDAG |
1830 | } |
1831 | ||
1832 | /* | |
1833 | * send rest of state - note things that are doing postcopy | |
1834 | * will notice we're in POSTCOPY_ACTIVE and not actually | |
1835 | * wrap their state up here | |
1836 | */ | |
89a02a9f | 1837 | qemu_file_set_rate_limit(ms->to_dst_file, INT64_MAX); |
58110f0a VSO |
1838 | if (migrate_postcopy_ram()) { |
1839 | /* Ping just for debugging, helps line traces up */ | |
1840 | qemu_savevm_send_ping(ms->to_dst_file, 2); | |
1841 | } | |
1d34e4bf DDAG |
1842 | |
1843 | /* | |
1844 | * While loading the device state we may trigger page transfer | |
1845 | * requests and the fd must be free to process those, and thus | |
1846 | * the destination must read the whole device state off the fd before | |
1847 | * it starts processing it. Unfortunately the ad-hoc migration format | |
1848 | * doesn't allow the destination to know the size to read without fully | |
1849 | * parsing it through each devices load-state code (especially the open | |
1850 | * coded devices that use get/put). | |
1851 | * So we wrap the device state up in a package with a length at the start; | |
1852 | * to do this we use a qemu_buf to hold the whole of the device state. | |
1853 | */ | |
61b67d47 | 1854 | bioc = qio_channel_buffer_new(4096); |
6f01f136 | 1855 | qio_channel_set_name(QIO_CHANNEL(bioc), "migration-postcopy-buffer"); |
61b67d47 DB |
1856 | fb = qemu_fopen_channel_output(QIO_CHANNEL(bioc)); |
1857 | object_unref(OBJECT(bioc)); | |
1d34e4bf | 1858 | |
c76201ab DDAG |
1859 | /* |
1860 | * Make sure the receiver can get incoming pages before we send the rest | |
1861 | * of the state | |
1862 | */ | |
1863 | qemu_savevm_send_postcopy_listen(fb); | |
1864 | ||
a1fbe750 | 1865 | qemu_savevm_state_complete_precopy(fb, false, false); |
58110f0a VSO |
1866 | if (migrate_postcopy_ram()) { |
1867 | qemu_savevm_send_ping(fb, 3); | |
1868 | } | |
1d34e4bf DDAG |
1869 | |
1870 | qemu_savevm_send_postcopy_run(fb); | |
1871 | ||
1872 | /* <><> end of stuff going into the package */ | |
1d34e4bf | 1873 | |
ef8d6488 DDAG |
1874 | /* Last point of recovery; as soon as we send the package the destination |
1875 | * can open devices and potentially start running. | |
1876 | * Lets just check again we've not got any errors. | |
1877 | */ | |
1878 | ret = qemu_file_get_error(ms->to_dst_file); | |
1879 | if (ret) { | |
1880 | error_report("postcopy_start: Migration stream errored (pre package)"); | |
1881 | goto fail_closefb; | |
1882 | } | |
1883 | ||
1884 | restart_block = false; | |
1885 | ||
1d34e4bf | 1886 | /* Now send that blob */ |
61b67d47 | 1887 | if (qemu_savevm_send_packaged(ms->to_dst_file, bioc->data, bioc->usage)) { |
1d34e4bf DDAG |
1888 | goto fail_closefb; |
1889 | } | |
1890 | qemu_fclose(fb); | |
b82fc321 DDAG |
1891 | |
1892 | /* Send a notify to give a chance for anything that needs to happen | |
1893 | * at the transition to postcopy and after the device state; in particular | |
1894 | * spice needs to trigger a transition now | |
1895 | */ | |
1896 | ms->postcopy_after_devices = true; | |
1897 | notifier_list_notify(&migration_state_notifiers, ms); | |
1898 | ||
1d34e4bf DDAG |
1899 | ms->downtime = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) - time_at_stop; |
1900 | ||
1901 | qemu_mutex_unlock_iothread(); | |
1902 | ||
58110f0a VSO |
1903 | if (migrate_postcopy_ram()) { |
1904 | /* | |
1905 | * Although this ping is just for debug, it could potentially be | |
1906 | * used for getting a better measurement of downtime at the source. | |
1907 | */ | |
1908 | qemu_savevm_send_ping(ms->to_dst_file, 4); | |
1909 | } | |
1d34e4bf | 1910 | |
ced1c616 PB |
1911 | if (migrate_release_ram()) { |
1912 | ram_postcopy_migrated_memory_release(ms); | |
1913 | } | |
1914 | ||
89a02a9f | 1915 | ret = qemu_file_get_error(ms->to_dst_file); |
1d34e4bf DDAG |
1916 | if (ret) { |
1917 | error_report("postcopy_start: Migration stream errored"); | |
48781e5b | 1918 | migrate_set_state(&ms->state, MIGRATION_STATUS_POSTCOPY_ACTIVE, |
1d34e4bf DDAG |
1919 | MIGRATION_STATUS_FAILED); |
1920 | } | |
1921 | ||
1922 | return ret; | |
1923 | ||
1924 | fail_closefb: | |
1925 | qemu_fclose(fb); | |
1926 | fail: | |
48781e5b | 1927 | migrate_set_state(&ms->state, MIGRATION_STATUS_POSTCOPY_ACTIVE, |
1d34e4bf | 1928 | MIGRATION_STATUS_FAILED); |
ef8d6488 DDAG |
1929 | if (restart_block) { |
1930 | /* A failure happened early enough that we know the destination hasn't | |
1931 | * accessed block devices, so we're safe to recover. | |
1932 | */ | |
1933 | Error *local_err = NULL; | |
1934 | ||
1935 | bdrv_invalidate_cache_all(&local_err); | |
1936 | if (local_err) { | |
1937 | error_report_err(local_err); | |
1938 | } | |
1939 | } | |
1d34e4bf DDAG |
1940 | qemu_mutex_unlock_iothread(); |
1941 | return -1; | |
1942 | } | |
1943 | ||
09f6c85e DDAG |
1944 | /** |
1945 | * migration_completion: Used by migration_thread when there's not much left. | |
1946 | * The caller 'breaks' the loop when this returns. | |
1947 | * | |
1948 | * @s: Current migration state | |
36f48567 | 1949 | * @current_active_state: The migration state we expect to be in |
09f6c85e DDAG |
1950 | * @*old_vm_running: Pointer to old_vm_running flag |
1951 | * @*start_time: Pointer to time to update | |
1952 | */ | |
36f48567 DDAG |
1953 | static void migration_completion(MigrationState *s, int current_active_state, |
1954 | bool *old_vm_running, | |
09f6c85e DDAG |
1955 | int64_t *start_time) |
1956 | { | |
1957 | int ret; | |
1958 | ||
b10ac0c4 DDAG |
1959 | if (s->state == MIGRATION_STATUS_ACTIVE) { |
1960 | qemu_mutex_lock_iothread(); | |
1961 | *start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); | |
1962 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER); | |
1963 | *old_vm_running = runstate_is_running(); | |
1964 | ret = global_state_store(); | |
1965 | ||
1966 | if (!ret) { | |
a1fbe750 | 1967 | bool inactivate = !migrate_colo_enabled(); |
b10ac0c4 | 1968 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); |
f07fa4cb KW |
1969 | if (ret >= 0) { |
1970 | qemu_file_set_rate_limit(s->to_dst_file, INT64_MAX); | |
a1fbe750 FZ |
1971 | ret = qemu_savevm_state_complete_precopy(s->to_dst_file, false, |
1972 | inactivate); | |
f07fa4cb | 1973 | } |
a1fbe750 FZ |
1974 | if (inactivate && ret >= 0) { |
1975 | s->block_inactive = true; | |
b10ac0c4 DDAG |
1976 | } |
1977 | } | |
1978 | qemu_mutex_unlock_iothread(); | |
09f6c85e | 1979 | |
b10ac0c4 DDAG |
1980 | if (ret < 0) { |
1981 | goto fail; | |
09f6c85e | 1982 | } |
b10ac0c4 DDAG |
1983 | } else if (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { |
1984 | trace_migration_completion_postcopy_end(); | |
1985 | ||
89a02a9f | 1986 | qemu_savevm_state_complete_postcopy(s->to_dst_file); |
b10ac0c4 | 1987 | trace_migration_completion_postcopy_end_after_complete(); |
09f6c85e | 1988 | } |
09f6c85e | 1989 | |
b10ac0c4 DDAG |
1990 | /* |
1991 | * If rp was opened we must clean up the thread before | |
1992 | * cleaning everything else up (since if there are no failures | |
1993 | * it will wait for the destination to send it's status in | |
1994 | * a SHUT command). | |
b10ac0c4 | 1995 | */ |
0425dc97 | 1996 | if (s->rp_state.from_dst_file) { |
b10ac0c4 | 1997 | int rp_error; |
0425dc97 | 1998 | trace_migration_return_path_end_before(); |
b10ac0c4 | 1999 | rp_error = await_return_path_close_on_source(s); |
0425dc97 | 2000 | trace_migration_return_path_end_after(rp_error); |
b10ac0c4 | 2001 | if (rp_error) { |
fe904ea8 | 2002 | goto fail_invalidate; |
b10ac0c4 | 2003 | } |
09f6c85e DDAG |
2004 | } |
2005 | ||
89a02a9f | 2006 | if (qemu_file_get_error(s->to_dst_file)) { |
09f6c85e | 2007 | trace_migration_completion_file_err(); |
fe904ea8 | 2008 | goto fail_invalidate; |
09f6c85e DDAG |
2009 | } |
2010 | ||
0b827d5e HZ |
2011 | if (!migrate_colo_enabled()) { |
2012 | migrate_set_state(&s->state, current_active_state, | |
2013 | MIGRATION_STATUS_COMPLETED); | |
2014 | } | |
2015 | ||
09f6c85e DDAG |
2016 | return; |
2017 | ||
fe904ea8 GK |
2018 | fail_invalidate: |
2019 | /* If not doing postcopy, vm_start() will be called: let's regain | |
2020 | * control on images. | |
2021 | */ | |
2022 | if (s->state == MIGRATION_STATUS_ACTIVE) { | |
2023 | Error *local_err = NULL; | |
2024 | ||
1d2acc31 | 2025 | qemu_mutex_lock_iothread(); |
fe904ea8 GK |
2026 | bdrv_invalidate_cache_all(&local_err); |
2027 | if (local_err) { | |
2028 | error_report_err(local_err); | |
1d2acc31 HZ |
2029 | } else { |
2030 | s->block_inactive = false; | |
fe904ea8 | 2031 | } |
1d2acc31 | 2032 | qemu_mutex_unlock_iothread(); |
fe904ea8 GK |
2033 | } |
2034 | ||
09f6c85e | 2035 | fail: |
48781e5b HZ |
2036 | migrate_set_state(&s->state, current_active_state, |
2037 | MIGRATION_STATUS_FAILED); | |
09f6c85e DDAG |
2038 | } |
2039 | ||
35a6ed4f HZ |
2040 | bool migrate_colo_enabled(void) |
2041 | { | |
2042 | MigrationState *s = migrate_get_current(); | |
2043 | return s->enabled_capabilities[MIGRATION_CAPABILITY_X_COLO]; | |
2044 | } | |
2045 | ||
70b20477 DDAG |
2046 | /* |
2047 | * Master migration thread on the source VM. | |
2048 | * It drives the migration and pumps the data down the outgoing channel. | |
2049 | */ | |
5f496a1b | 2050 | static void *migration_thread(void *opaque) |
0d82d0e8 | 2051 | { |
9848a404 | 2052 | MigrationState *s = opaque; |
1d34e4bf | 2053 | /* Used by the bandwidth calcs, updated later */ |
bc72ad67 AB |
2054 | int64_t initial_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
2055 | int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST); | |
be7172e2 | 2056 | int64_t initial_bytes = 0; |
faec066a PX |
2057 | /* |
2058 | * The final stage happens when the remaining data is smaller than | |
2059 | * this threshold; it's calculated from the requested downtime and | |
2060 | * measured bandwidth | |
2061 | */ | |
2062 | int64_t threshold_size = 0; | |
a3fa1d78 | 2063 | int64_t start_time = initial_time; |
94f5a437 | 2064 | int64_t end_time; |
a3fa1d78 | 2065 | bool old_vm_running = false; |
1d34e4bf DDAG |
2066 | bool entered_postcopy = false; |
2067 | /* The active state we expect to be in; ACTIVE or POSTCOPY_ACTIVE */ | |
2068 | enum MigrationStatus current_active_state = MIGRATION_STATUS_ACTIVE; | |
0b827d5e | 2069 | bool enable_colo = migrate_colo_enabled(); |
76f5933a | 2070 | |
ab28bd23 PB |
2071 | rcu_register_thread(); |
2072 | ||
89a02a9f | 2073 | qemu_savevm_state_header(s->to_dst_file); |
1d34e4bf | 2074 | |
62a02658 PX |
2075 | /* |
2076 | * If we opened the return path, we need to make sure dst has it | |
2077 | * opened as well. | |
2078 | */ | |
2079 | if (s->rp_state.from_dst_file) { | |
1d34e4bf | 2080 | /* Now tell the dest that it should open its end so it can reply */ |
89a02a9f | 2081 | qemu_savevm_send_open_return_path(s->to_dst_file); |
1d34e4bf DDAG |
2082 | |
2083 | /* And do a ping that will make stuff easier to debug */ | |
89a02a9f | 2084 | qemu_savevm_send_ping(s->to_dst_file, 1); |
0425dc97 | 2085 | } |
1d34e4bf | 2086 | |
58110f0a | 2087 | if (migrate_postcopy()) { |
1d34e4bf DDAG |
2088 | /* |
2089 | * Tell the destination that we *might* want to do postcopy later; | |
2090 | * if the other end can't do postcopy it should fail now, nice and | |
2091 | * early. | |
2092 | */ | |
89a02a9f | 2093 | qemu_savevm_send_postcopy_advise(s->to_dst_file); |
1d34e4bf DDAG |
2094 | } |
2095 | ||
9907e842 | 2096 | qemu_savevm_state_setup(s->to_dst_file); |
0d82d0e8 | 2097 | |
bc72ad67 | 2098 | s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start; |
48781e5b HZ |
2099 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
2100 | MIGRATION_STATUS_ACTIVE); | |
29ae8a41 | 2101 | |
9ec055ae DDAG |
2102 | trace_migration_thread_setup_complete(); |
2103 | ||
2104 | while (s->state == MIGRATION_STATUS_ACTIVE || | |
2105 | s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { | |
a3e879cd | 2106 | int64_t current_time; |
c369f40d | 2107 | uint64_t pending_size; |
0d82d0e8 | 2108 | |
89a02a9f | 2109 | if (!qemu_file_rate_limit(s->to_dst_file)) { |
c31b098f DDAG |
2110 | uint64_t pend_post, pend_nonpost; |
2111 | ||
faec066a PX |
2112 | qemu_savevm_state_pending(s->to_dst_file, threshold_size, |
2113 | &pend_nonpost, &pend_post); | |
c31b098f | 2114 | pending_size = pend_nonpost + pend_post; |
faec066a | 2115 | trace_migrate_pending(pending_size, threshold_size, |
c31b098f | 2116 | pend_post, pend_nonpost); |
faec066a | 2117 | if (pending_size && pending_size >= threshold_size) { |
1d34e4bf DDAG |
2118 | /* Still a significant amount to transfer */ |
2119 | ||
58110f0a | 2120 | if (migrate_postcopy() && |
1d34e4bf | 2121 | s->state != MIGRATION_STATUS_POSTCOPY_ACTIVE && |
faec066a | 2122 | pend_nonpost <= threshold_size && |
1d34e4bf DDAG |
2123 | atomic_read(&s->start_postcopy)) { |
2124 | ||
2125 | if (!postcopy_start(s, &old_vm_running)) { | |
2126 | current_active_state = MIGRATION_STATUS_POSTCOPY_ACTIVE; | |
2127 | entered_postcopy = true; | |
2128 | } | |
2129 | ||
2130 | continue; | |
2131 | } | |
2132 | /* Just another iteration step */ | |
89a02a9f | 2133 | qemu_savevm_state_iterate(s->to_dst_file, entered_postcopy); |
c369f40d | 2134 | } else { |
09f6c85e | 2135 | trace_migration_thread_low_pending(pending_size); |
1d34e4bf | 2136 | migration_completion(s, current_active_state, |
36f48567 | 2137 | &old_vm_running, &start_time); |
09f6c85e | 2138 | break; |
c369f40d JQ |
2139 | } |
2140 | } | |
f4410a5d | 2141 | |
89a02a9f | 2142 | if (qemu_file_get_error(s->to_dst_file)) { |
48781e5b HZ |
2143 | migrate_set_state(&s->state, current_active_state, |
2144 | MIGRATION_STATUS_FAILED); | |
1d34e4bf | 2145 | trace_migration_thread_file_err(); |
fd45ee2c PB |
2146 | break; |
2147 | } | |
bc72ad67 | 2148 | current_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0d82d0e8 | 2149 | if (current_time >= initial_time + BUFFER_DELAY) { |
89a02a9f HZ |
2150 | uint64_t transferred_bytes = qemu_ftell(s->to_dst_file) - |
2151 | initial_bytes; | |
77417f10 | 2152 | uint64_t time_spent = current_time - initial_time; |
a694ee34 | 2153 | double bandwidth = (double)transferred_bytes / time_spent; |
faec066a | 2154 | threshold_size = bandwidth * s->parameters.downtime_limit; |
0d82d0e8 | 2155 | |
5b648de0 WY |
2156 | s->mbps = (((double) transferred_bytes * 8.0) / |
2157 | ((double) time_spent / 1000.0)) / 1000.0 / 1000.0; | |
7e114f8c | 2158 | |
9013dca5 | 2159 | trace_migrate_transferred(transferred_bytes, time_spent, |
faec066a | 2160 | bandwidth, threshold_size); |
90f8ae72 JQ |
2161 | /* if we haven't sent anything, we don't want to recalculate |
2162 | 10000 is a small enough number for our purposes */ | |
9360447d JQ |
2163 | if (ram_counters.dirty_pages_rate && transferred_bytes > 10000) { |
2164 | s->expected_downtime = ram_counters.dirty_pages_rate * | |
20afaed9 | 2165 | qemu_target_page_size() / bandwidth; |
90f8ae72 | 2166 | } |
0d82d0e8 | 2167 | |
89a02a9f | 2168 | qemu_file_reset_rate_limit(s->to_dst_file); |
0d82d0e8 | 2169 | initial_time = current_time; |
89a02a9f | 2170 | initial_bytes = qemu_ftell(s->to_dst_file); |
0d82d0e8 | 2171 | } |
89a02a9f | 2172 | if (qemu_file_rate_limit(s->to_dst_file)) { |
0d82d0e8 JQ |
2173 | /* usleep expects microseconds */ |
2174 | g_usleep((initial_time + BUFFER_DELAY - current_time)*1000); | |
2175 | } | |
a3fa1d78 PB |
2176 | } |
2177 | ||
1d34e4bf | 2178 | trace_migration_thread_after_loop(); |
070afca2 JH |
2179 | /* If we enabled cpu throttling for auto-converge, turn it off. */ |
2180 | cpu_throttle_stop(); | |
94f5a437 | 2181 | end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
070afca2 | 2182 | |
f4410a5d | 2183 | qemu_mutex_lock_iothread(); |
0b827d5e HZ |
2184 | /* |
2185 | * The resource has been allocated by migration will be reused in COLO | |
2186 | * process, so don't release them. | |
2187 | */ | |
2188 | if (!enable_colo) { | |
2189 | qemu_savevm_state_cleanup(); | |
2190 | } | |
31194731 | 2191 | if (s->state == MIGRATION_STATUS_COMPLETED) { |
89a02a9f | 2192 | uint64_t transferred_bytes = qemu_ftell(s->to_dst_file); |
a3fa1d78 | 2193 | s->total_time = end_time - s->total_time; |
1d34e4bf DDAG |
2194 | if (!entered_postcopy) { |
2195 | s->downtime = end_time - start_time; | |
2196 | } | |
d6ed7312 PL |
2197 | if (s->total_time) { |
2198 | s->mbps = (((double) transferred_bytes * 8.0) / | |
2199 | ((double) s->total_time)) / 1000; | |
2200 | } | |
a3fa1d78 PB |
2201 | runstate_set(RUN_STATE_POSTMIGRATE); |
2202 | } else { | |
0b827d5e HZ |
2203 | if (s->state == MIGRATION_STATUS_ACTIVE && enable_colo) { |
2204 | migrate_start_colo_process(s); | |
2205 | qemu_savevm_state_cleanup(); | |
2206 | /* | |
2207 | * Fixme: we will run VM in COLO no matter its old running state. | |
2208 | * After exited COLO, we will keep running. | |
2209 | */ | |
2210 | old_vm_running = true; | |
2211 | } | |
1d34e4bf | 2212 | if (old_vm_running && !entered_postcopy) { |
a3fa1d78 | 2213 | vm_start(); |
42da5550 DDAG |
2214 | } else { |
2215 | if (runstate_check(RUN_STATE_FINISH_MIGRATE)) { | |
2216 | runstate_set(RUN_STATE_POSTMIGRATE); | |
2217 | } | |
dba433c0 | 2218 | } |
0d82d0e8 | 2219 | } |
bb1fadc4 | 2220 | qemu_bh_schedule(s->cleanup_bh); |
dba433c0 | 2221 | qemu_mutex_unlock_iothread(); |
f4410a5d | 2222 | |
ab28bd23 | 2223 | rcu_unregister_thread(); |
0d82d0e8 JQ |
2224 | return NULL; |
2225 | } | |
2226 | ||
9848a404 | 2227 | void migrate_fd_connect(MigrationState *s) |
0d82d0e8 | 2228 | { |
2ff30257 | 2229 | s->expected_downtime = s->parameters.downtime_limit; |
bb1fadc4 | 2230 | s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s); |
0d82d0e8 | 2231 | |
9e4d2b98 | 2232 | qemu_file_set_blocking(s->to_dst_file, true); |
89a02a9f | 2233 | qemu_file_set_rate_limit(s->to_dst_file, |
2ff30257 | 2234 | s->parameters.max_bandwidth / XFER_LIMIT_RATIO); |
442773ce | 2235 | |
9287ac27 SH |
2236 | /* Notify before starting migration thread */ |
2237 | notifier_list_notify(&migration_state_notifiers, s); | |
2238 | ||
1d34e4bf | 2239 | /* |
c788ada8 PX |
2240 | * Open the return path. For postcopy, it is used exclusively. For |
2241 | * precopy, only if user specified "return-path" capability would | |
2242 | * QEMU uses the return path. | |
1d34e4bf | 2243 | */ |
c788ada8 | 2244 | if (migrate_postcopy_ram() || migrate_use_return_path()) { |
1d34e4bf DDAG |
2245 | if (open_return_path_on_source(s)) { |
2246 | error_report("Unable to open return-path for postcopy"); | |
48781e5b | 2247 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
1d34e4bf DDAG |
2248 | MIGRATION_STATUS_FAILED); |
2249 | migrate_fd_cleanup(s); | |
2250 | return; | |
2251 | } | |
2252 | } | |
2253 | ||
f986c3d2 JQ |
2254 | if (multifd_save_setup() != 0) { |
2255 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, | |
2256 | MIGRATION_STATUS_FAILED); | |
2257 | migrate_fd_cleanup(s); | |
2258 | return; | |
2259 | } | |
009fad7f | 2260 | qemu_thread_create(&s->thread, "live_migration", migration_thread, s, |
bb1fadc4 | 2261 | QEMU_THREAD_JOINABLE); |
1d34e4bf | 2262 | s->migration_thread_running = true; |
0d82d0e8 | 2263 | } |
093e3c42 | 2264 | |
9d18af93 PX |
2265 | void migration_global_dump(Monitor *mon) |
2266 | { | |
2267 | MigrationState *ms = migrate_get_current(); | |
2268 | ||
2269 | monitor_printf(mon, "globals: store-global-state=%d, only_migratable=%d, " | |
2270 | "send-configuration=%d, send-section-footer=%d\n", | |
2271 | ms->store_global_state, ms->only_migratable, | |
2272 | ms->send_configuration, ms->send_section_footer); | |
2273 | } | |
2274 | ||
20814758 PX |
2275 | #define DEFINE_PROP_MIG_CAP(name, x) \ |
2276 | DEFINE_PROP_BOOL(name, MigrationState, enabled_capabilities[x], false) | |
2277 | ||
5272298c PX |
2278 | static Property migration_properties[] = { |
2279 | DEFINE_PROP_BOOL("store-global-state", MigrationState, | |
2280 | store_global_state, true), | |
3df663e5 | 2281 | DEFINE_PROP_BOOL("only-migratable", MigrationState, only_migratable, false), |
71dd4c1a PX |
2282 | DEFINE_PROP_BOOL("send-configuration", MigrationState, |
2283 | send_configuration, true), | |
15c38503 PX |
2284 | DEFINE_PROP_BOOL("send-section-footer", MigrationState, |
2285 | send_section_footer, true), | |
89632faf PX |
2286 | |
2287 | /* Migration parameters */ | |
2288 | DEFINE_PROP_INT64("x-compress-level", MigrationState, | |
2289 | parameters.compress_level, | |
2290 | DEFAULT_MIGRATE_COMPRESS_LEVEL), | |
2291 | DEFINE_PROP_INT64("x-compress-threads", MigrationState, | |
2292 | parameters.compress_threads, | |
2293 | DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT), | |
2294 | DEFINE_PROP_INT64("x-decompress-threads", MigrationState, | |
2295 | parameters.decompress_threads, | |
2296 | DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT), | |
2297 | DEFINE_PROP_INT64("x-cpu-throttle-initial", MigrationState, | |
2298 | parameters.cpu_throttle_initial, | |
2299 | DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL), | |
2300 | DEFINE_PROP_INT64("x-cpu-throttle-increment", MigrationState, | |
2301 | parameters.cpu_throttle_increment, | |
2302 | DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT), | |
2303 | DEFINE_PROP_INT64("x-max-bandwidth", MigrationState, | |
2304 | parameters.max_bandwidth, MAX_THROTTLE), | |
2305 | DEFINE_PROP_INT64("x-downtime-limit", MigrationState, | |
2306 | parameters.downtime_limit, | |
2307 | DEFAULT_MIGRATE_SET_DOWNTIME), | |
2308 | DEFINE_PROP_INT64("x-checkpoint-delay", MigrationState, | |
2309 | parameters.x_checkpoint_delay, | |
2310 | DEFAULT_MIGRATE_X_CHECKPOINT_DELAY), | |
4075fb1c JQ |
2311 | DEFINE_PROP_INT64("x-multifd-channels", MigrationState, |
2312 | parameters.x_multifd_channels, | |
2313 | DEFAULT_MIGRATE_MULTIFD_CHANNELS), | |
0fb86605 JQ |
2314 | DEFINE_PROP_INT64("x-multifd-page-count", MigrationState, |
2315 | parameters.x_multifd_page_count, | |
2316 | DEFAULT_MIGRATE_MULTIFD_PAGE_COUNT), | |
20814758 PX |
2317 | |
2318 | /* Migration capabilities */ | |
2319 | DEFINE_PROP_MIG_CAP("x-xbzrle", MIGRATION_CAPABILITY_XBZRLE), | |
2320 | DEFINE_PROP_MIG_CAP("x-rdma-pin-all", MIGRATION_CAPABILITY_RDMA_PIN_ALL), | |
2321 | DEFINE_PROP_MIG_CAP("x-auto-converge", MIGRATION_CAPABILITY_AUTO_CONVERGE), | |
2322 | DEFINE_PROP_MIG_CAP("x-zero-blocks", MIGRATION_CAPABILITY_ZERO_BLOCKS), | |
2323 | DEFINE_PROP_MIG_CAP("x-compress", MIGRATION_CAPABILITY_COMPRESS), | |
2324 | DEFINE_PROP_MIG_CAP("x-events", MIGRATION_CAPABILITY_EVENTS), | |
2325 | DEFINE_PROP_MIG_CAP("x-postcopy-ram", MIGRATION_CAPABILITY_POSTCOPY_RAM), | |
2326 | DEFINE_PROP_MIG_CAP("x-colo", MIGRATION_CAPABILITY_X_COLO), | |
2327 | DEFINE_PROP_MIG_CAP("x-release-ram", MIGRATION_CAPABILITY_RELEASE_RAM), | |
2328 | DEFINE_PROP_MIG_CAP("x-block", MIGRATION_CAPABILITY_BLOCK), | |
2329 | DEFINE_PROP_MIG_CAP("x-return-path", MIGRATION_CAPABILITY_RETURN_PATH), | |
30126bbf | 2330 | DEFINE_PROP_MIG_CAP("x-multifd", MIGRATION_CAPABILITY_X_MULTIFD), |
20814758 | 2331 | |
5272298c PX |
2332 | DEFINE_PROP_END_OF_LIST(), |
2333 | }; | |
2334 | ||
e5cb7e76 PX |
2335 | static void migration_class_init(ObjectClass *klass, void *data) |
2336 | { | |
2337 | DeviceClass *dc = DEVICE_CLASS(klass); | |
2338 | ||
2339 | dc->user_creatable = false; | |
5272298c | 2340 | dc->props = migration_properties; |
e5cb7e76 PX |
2341 | } |
2342 | ||
b91bf5e4 MAL |
2343 | static void migration_instance_finalize(Object *obj) |
2344 | { | |
2345 | MigrationState *ms = MIGRATION_OBJ(obj); | |
2346 | MigrationParameters *params = &ms->parameters; | |
2347 | ||
2348 | g_free(params->tls_hostname); | |
2349 | g_free(params->tls_creds); | |
2350 | } | |
2351 | ||
e5cb7e76 PX |
2352 | static void migration_instance_init(Object *obj) |
2353 | { | |
2354 | MigrationState *ms = MIGRATION_OBJ(obj); | |
8b0b29dc | 2355 | MigrationParameters *params = &ms->parameters; |
e5cb7e76 PX |
2356 | |
2357 | ms->state = MIGRATION_STATUS_NONE; | |
2358 | ms->xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE; | |
2359 | ms->mbps = -1; | |
8b0b29dc PX |
2360 | |
2361 | params->tls_hostname = g_strdup(""); | |
2362 | params->tls_creds = g_strdup(""); | |
2363 | ||
2364 | /* Set has_* up only for parameter checks */ | |
2365 | params->has_compress_level = true; | |
2366 | params->has_compress_threads = true; | |
2367 | params->has_decompress_threads = true; | |
2368 | params->has_cpu_throttle_initial = true; | |
2369 | params->has_cpu_throttle_increment = true; | |
2370 | params->has_max_bandwidth = true; | |
2371 | params->has_downtime_limit = true; | |
2372 | params->has_x_checkpoint_delay = true; | |
2373 | params->has_block_incremental = true; | |
4075fb1c | 2374 | params->has_x_multifd_channels = true; |
0fb86605 | 2375 | params->has_x_multifd_page_count = true; |
8b0b29dc PX |
2376 | } |
2377 | ||
2378 | /* | |
2379 | * Return true if check pass, false otherwise. Error will be put | |
2380 | * inside errp if provided. | |
2381 | */ | |
2382 | static bool migration_object_check(MigrationState *ms, Error **errp) | |
2383 | { | |
6b19a7d9 PX |
2384 | MigrationCapabilityStatusList *head = NULL; |
2385 | /* Assuming all off */ | |
2386 | bool cap_list[MIGRATION_CAPABILITY__MAX] = { 0 }, ret; | |
2387 | int i; | |
2388 | ||
8b0b29dc PX |
2389 | if (!migrate_params_check(&ms->parameters, errp)) { |
2390 | return false; | |
2391 | } | |
2392 | ||
6b19a7d9 PX |
2393 | for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { |
2394 | if (ms->enabled_capabilities[i]) { | |
2395 | head = migrate_cap_add(head, i, true); | |
2396 | } | |
2397 | } | |
2398 | ||
2399 | ret = migrate_caps_check(cap_list, head, errp); | |
2400 | ||
2401 | /* It works with head == NULL */ | |
2402 | qapi_free_MigrationCapabilityStatusList(head); | |
2403 | ||
2404 | return ret; | |
e5cb7e76 PX |
2405 | } |
2406 | ||
2407 | static const TypeInfo migration_type = { | |
2408 | .name = TYPE_MIGRATION, | |
01f6e14c | 2409 | /* |
c8d3ff38 PX |
2410 | * NOTE: TYPE_MIGRATION is not really a device, as the object is |
2411 | * not created using qdev_create(), it is not attached to the qdev | |
2412 | * device tree, and it is never realized. | |
2413 | * | |
2414 | * TODO: Make this TYPE_OBJECT once QOM provides something like | |
2415 | * TYPE_DEVICE's "-global" properties. | |
01f6e14c | 2416 | */ |
e5cb7e76 PX |
2417 | .parent = TYPE_DEVICE, |
2418 | .class_init = migration_class_init, | |
2419 | .class_size = sizeof(MigrationClass), | |
2420 | .instance_size = sizeof(MigrationState), | |
2421 | .instance_init = migration_instance_init, | |
b91bf5e4 | 2422 | .instance_finalize = migration_instance_finalize, |
e5cb7e76 PX |
2423 | }; |
2424 | ||
2425 | static void register_migration_types(void) | |
2426 | { | |
2427 | type_register_static(&migration_type); | |
2428 | } | |
2429 | ||
2430 | type_init(register_migration_types); |