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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" |
e688df6b | 33 | #include "qapi/error.h" |
9af23989 MA |
34 | #include "qapi/qapi-commands-migration.h" |
35 | #include "qapi/qapi-events-migration.h" | |
cc7a8ea7 | 36 | #include "qapi/qmp/qerror.h" |
15280c36 | 37 | #include "qapi/qmp/qnull.h" |
ab28bd23 | 38 | #include "qemu/rcu.h" |
2c9e6fec | 39 | #include "block.h" |
be07b0ac | 40 | #include "postcopy-ram.h" |
766bd176 | 41 | #include "qemu/thread.h" |
c09e5bb1 | 42 | #include "trace.h" |
51180423 | 43 | #include "exec/target_page.h" |
61b67d47 | 44 | #include "io/channel-buffer.h" |
35a6ed4f | 45 | #include "migration/colo.h" |
4ffdb337 | 46 | #include "hw/boards.h" |
9d18af93 | 47 | #include "monitor/monitor.h" |
50510ea2 | 48 | #include "net/announce.h" |
065e2813 | 49 | |
dc325627 | 50 | #define MAX_THROTTLE (32 << 20) /* Migration transfer speed throttling */ |
5bb7910a | 51 | |
5b4e1eb7 JQ |
52 | /* Amount of time to allocate to each "chunk" of bandwidth-throttled |
53 | * data. */ | |
54 | #define BUFFER_DELAY 100 | |
55 | #define XFER_LIMIT_RATIO (1000 / BUFFER_DELAY) | |
56 | ||
2ff30257 AA |
57 | /* Time in milliseconds we are allowed to stop the source, |
58 | * for sending the last part */ | |
59 | #define DEFAULT_MIGRATE_SET_DOWNTIME 300 | |
60 | ||
87c9cc1c DHB |
61 | /* Maximum migrate downtime set to 2000 seconds */ |
62 | #define MAX_MIGRATE_DOWNTIME_SECONDS 2000 | |
63 | #define MAX_MIGRATE_DOWNTIME (MAX_MIGRATE_DOWNTIME_SECONDS * 1000) | |
64 | ||
8706d2d5 LL |
65 | /* Default compression thread count */ |
66 | #define DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT 8 | |
3fcb38c2 LL |
67 | /* Default decompression thread count, usually decompression is at |
68 | * least 4 times as fast as compression.*/ | |
69 | #define DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT 2 | |
8706d2d5 LL |
70 | /*0: means nocompress, 1: best speed, ... 9: best compress ratio */ |
71 | #define DEFAULT_MIGRATE_COMPRESS_LEVEL 1 | |
1626fee3 | 72 | /* Define default autoconverge cpu throttle migration parameters */ |
d85a31d1 JH |
73 | #define DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL 20 |
74 | #define DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT 10 | |
4cbc9c7f | 75 | #define DEFAULT_MIGRATE_MAX_CPU_THROTTLE 99 |
8706d2d5 | 76 | |
17ad9b35 | 77 | /* Migration XBZRLE default cache size */ |
73af8dd8 | 78 | #define DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE (64 * 1024 * 1024) |
17ad9b35 | 79 | |
131b2153 ZC |
80 | /* The delay time (in ms) between two COLO checkpoints */ |
81 | #define DEFAULT_MIGRATE_X_CHECKPOINT_DELAY (200 * 100) | |
4075fb1c | 82 | #define DEFAULT_MIGRATE_MULTIFD_CHANNELS 2 |
0fb86605 | 83 | #define DEFAULT_MIGRATE_MULTIFD_PAGE_COUNT 16 |
68b53591 | 84 | |
7e555c6c DDAG |
85 | /* Background transfer rate for postcopy, 0 means unlimited, note |
86 | * that page requests can still exceed this limit. | |
87 | */ | |
88 | #define DEFAULT_MIGRATE_MAX_POSTCOPY_BANDWIDTH 0 | |
89 | ||
ee3d96ba DDAG |
90 | /* |
91 | * Parameters for self_announce_delay giving a stream of RARP/ARP | |
92 | * packets after migration. | |
93 | */ | |
94 | #define DEFAULT_MIGRATE_ANNOUNCE_INITIAL 50 | |
95 | #define DEFAULT_MIGRATE_ANNOUNCE_MAX 550 | |
96 | #define DEFAULT_MIGRATE_ANNOUNCE_ROUNDS 5 | |
97 | #define DEFAULT_MIGRATE_ANNOUNCE_STEP 100 | |
98 | ||
99a0db9b GH |
99 | static NotifierList migration_state_notifiers = |
100 | NOTIFIER_LIST_INITIALIZER(migration_state_notifiers); | |
101 | ||
adde220a DDAG |
102 | static bool deferred_incoming; |
103 | ||
da6f1790 JQ |
104 | /* Messages sent on the return path from destination to source */ |
105 | enum mig_rp_message_type { | |
106 | MIG_RP_MSG_INVALID = 0, /* Must be 0 */ | |
107 | MIG_RP_MSG_SHUT, /* sibling will not send any more RP messages */ | |
108 | MIG_RP_MSG_PONG, /* Response to a PING; data (seq: be32 ) */ | |
109 | ||
110 | MIG_RP_MSG_REQ_PAGES_ID, /* data (start: be64, len: be32, id: string) */ | |
111 | MIG_RP_MSG_REQ_PAGES, /* data (start: be64, len: be32) */ | |
a335debb | 112 | MIG_RP_MSG_RECV_BITMAP, /* send recved_bitmap back to source */ |
13955b89 | 113 | MIG_RP_MSG_RESUME_ACK, /* tell source that we are ready to resume */ |
da6f1790 JQ |
114 | |
115 | MIG_RP_MSG_MAX | |
116 | }; | |
117 | ||
17549e84 JQ |
118 | /* When we add fault tolerance, we could have several |
119 | migrations at once. For now we don't need to add | |
120 | dynamic creation of migration */ | |
121 | ||
e5cb7e76 | 122 | static MigrationState *current_migration; |
e1b1b1bc | 123 | static MigrationIncomingState *current_incoming; |
e5cb7e76 | 124 | |
8b0b29dc | 125 | static bool migration_object_check(MigrationState *ms, Error **errp); |
0331c8ca DDAG |
126 | static int migration_maybe_pause(MigrationState *s, |
127 | int *current_active_state, | |
128 | int new_state); | |
892ae715 | 129 | static void migrate_fd_cancel(MigrationState *s); |
8b0b29dc | 130 | |
e5cb7e76 PX |
131 | void migration_object_init(void) |
132 | { | |
4ffdb337 | 133 | MachineState *ms = MACHINE(qdev_get_machine()); |
8b0b29dc | 134 | Error *err = NULL; |
4ffdb337 | 135 | |
e5cb7e76 PX |
136 | /* This can only be called once. */ |
137 | assert(!current_migration); | |
138 | current_migration = MIGRATION_OBJ(object_new(TYPE_MIGRATION)); | |
4ffdb337 | 139 | |
e1b1b1bc PX |
140 | /* |
141 | * Init the migrate incoming object as well no matter whether | |
142 | * we'll use it or not. | |
143 | */ | |
144 | assert(!current_incoming); | |
145 | current_incoming = g_new0(MigrationIncomingState, 1); | |
146 | current_incoming->state = MIGRATION_STATUS_NONE; | |
147 | current_incoming->postcopy_remote_fds = | |
148 | g_array_new(FALSE, TRUE, sizeof(struct PostCopyFD)); | |
149 | qemu_mutex_init(¤t_incoming->rp_mutex); | |
150 | qemu_event_init(¤t_incoming->main_thread_load_event, false); | |
151 | qemu_sem_init(¤t_incoming->postcopy_pause_sem_dst, 0); | |
152 | qemu_sem_init(¤t_incoming->postcopy_pause_sem_fault, 0); | |
153 | ||
154 | init_dirty_bitmap_incoming_migration(); | |
155 | ||
8b0b29dc PX |
156 | if (!migration_object_check(current_migration, &err)) { |
157 | error_report_err(err); | |
158 | exit(1); | |
159 | } | |
160 | ||
4ffdb337 PX |
161 | /* |
162 | * We cannot really do this in migration_instance_init() since at | |
163 | * that time global properties are not yet applied, then this | |
164 | * value will be definitely replaced by something else. | |
165 | */ | |
166 | if (ms->enforce_config_section) { | |
167 | current_migration->send_configuration = true; | |
168 | } | |
e5cb7e76 PX |
169 | } |
170 | ||
892ae715 | 171 | void migration_shutdown(void) |
1f895604 | 172 | { |
892ae715 DDAG |
173 | /* |
174 | * Cancel the current migration - that will (eventually) | |
175 | * stop the migration using this structure | |
176 | */ | |
177 | migrate_fd_cancel(current_migration); | |
1f895604 VSO |
178 | object_unref(OBJECT(current_migration)); |
179 | } | |
180 | ||
bca7856a | 181 | /* For outgoing */ |
859bc756 | 182 | MigrationState *migrate_get_current(void) |
17549e84 | 183 | { |
e5cb7e76 PX |
184 | /* This can only be called after the object created. */ |
185 | assert(current_migration); | |
186 | return current_migration; | |
17549e84 JQ |
187 | } |
188 | ||
bca7856a DDAG |
189 | MigrationIncomingState *migration_incoming_get_current(void) |
190 | { | |
e1b1b1bc PX |
191 | assert(current_incoming); |
192 | return current_incoming; | |
bca7856a DDAG |
193 | } |
194 | ||
195 | void migration_incoming_state_destroy(void) | |
196 | { | |
b4b076da JQ |
197 | struct MigrationIncomingState *mis = migration_incoming_get_current(); |
198 | ||
3482655b | 199 | if (mis->to_src_file) { |
660819b1 PX |
200 | /* Tell source that we are done */ |
201 | migrate_send_rp_shut(mis, qemu_file_get_error(mis->from_src_file) != 0); | |
3482655b PX |
202 | qemu_fclose(mis->to_src_file); |
203 | mis->to_src_file = NULL; | |
204 | } | |
205 | ||
660819b1 PX |
206 | if (mis->from_src_file) { |
207 | qemu_fclose(mis->from_src_file); | |
208 | mis->from_src_file = NULL; | |
209 | } | |
00fa4fc8 DDAG |
210 | if (mis->postcopy_remote_fds) { |
211 | g_array_free(mis->postcopy_remote_fds, TRUE); | |
212 | mis->postcopy_remote_fds = NULL; | |
213 | } | |
660819b1 | 214 | |
5089e186 | 215 | qemu_event_reset(&mis->main_thread_load_event); |
bca7856a DDAG |
216 | } |
217 | ||
b05dc723 JQ |
218 | static void migrate_generate_event(int new_state) |
219 | { | |
220 | if (migrate_use_events()) { | |
3ab72385 | 221 | qapi_event_send_migration(new_state); |
b05dc723 JQ |
222 | } |
223 | } | |
224 | ||
0f073f44 DDAG |
225 | static bool migrate_late_block_activate(void) |
226 | { | |
227 | MigrationState *s; | |
228 | ||
229 | s = migrate_get_current(); | |
230 | ||
231 | return s->enabled_capabilities[ | |
232 | MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE]; | |
233 | } | |
234 | ||
adde220a DDAG |
235 | /* |
236 | * Called on -incoming with a defer: uri. | |
237 | * The migration can be started later after any parameters have been | |
238 | * changed. | |
239 | */ | |
240 | static void deferred_incoming_migration(Error **errp) | |
241 | { | |
242 | if (deferred_incoming) { | |
243 | error_setg(errp, "Incoming migration already deferred"); | |
244 | } | |
245 | deferred_incoming = true; | |
246 | } | |
247 | ||
da6f1790 JQ |
248 | /* |
249 | * Send a message on the return channel back to the source | |
250 | * of the migration. | |
251 | */ | |
d6208e35 PX |
252 | static int migrate_send_rp_message(MigrationIncomingState *mis, |
253 | enum mig_rp_message_type message_type, | |
254 | uint16_t len, void *data) | |
da6f1790 | 255 | { |
d6208e35 PX |
256 | int ret = 0; |
257 | ||
da6f1790 JQ |
258 | trace_migrate_send_rp_message((int)message_type, len); |
259 | qemu_mutex_lock(&mis->rp_mutex); | |
d6208e35 PX |
260 | |
261 | /* | |
262 | * It's possible that the file handle got lost due to network | |
263 | * failures. | |
264 | */ | |
265 | if (!mis->to_src_file) { | |
266 | ret = -EIO; | |
267 | goto error; | |
268 | } | |
269 | ||
da6f1790 JQ |
270 | qemu_put_be16(mis->to_src_file, (unsigned int)message_type); |
271 | qemu_put_be16(mis->to_src_file, len); | |
272 | qemu_put_buffer(mis->to_src_file, data, len); | |
273 | qemu_fflush(mis->to_src_file); | |
d6208e35 PX |
274 | |
275 | /* It's possible that qemu file got error during sending */ | |
276 | ret = qemu_file_get_error(mis->to_src_file); | |
277 | ||
278 | error: | |
da6f1790 | 279 | qemu_mutex_unlock(&mis->rp_mutex); |
d6208e35 | 280 | return ret; |
da6f1790 JQ |
281 | } |
282 | ||
1e2d90eb DDAG |
283 | /* Request a range of pages from the source VM at the given |
284 | * start address. | |
285 | * rbname: Name of the RAMBlock to request the page in, if NULL it's the same | |
286 | * as the last request (a name must have been given previously) | |
287 | * Start: Address offset within the RB | |
288 | * Len: Length in bytes required - must be a multiple of pagesize | |
289 | */ | |
d6208e35 PX |
290 | int migrate_send_rp_req_pages(MigrationIncomingState *mis, const char *rbname, |
291 | ram_addr_t start, size_t len) | |
1e2d90eb | 292 | { |
cb8d4c8f | 293 | uint8_t bufc[12 + 1 + 255]; /* start (8), len (4), rbname up to 256 */ |
1e2d90eb | 294 | size_t msglen = 12; /* start + len */ |
d6208e35 | 295 | enum mig_rp_message_type msg_type; |
1e2d90eb DDAG |
296 | |
297 | *(uint64_t *)bufc = cpu_to_be64((uint64_t)start); | |
298 | *(uint32_t *)(bufc + 8) = cpu_to_be32((uint32_t)len); | |
299 | ||
300 | if (rbname) { | |
301 | int rbname_len = strlen(rbname); | |
302 | assert(rbname_len < 256); | |
303 | ||
304 | bufc[msglen++] = rbname_len; | |
305 | memcpy(bufc + msglen, rbname, rbname_len); | |
306 | msglen += rbname_len; | |
d6208e35 | 307 | msg_type = MIG_RP_MSG_REQ_PAGES_ID; |
1e2d90eb | 308 | } else { |
d6208e35 | 309 | msg_type = MIG_RP_MSG_REQ_PAGES; |
1e2d90eb | 310 | } |
d6208e35 PX |
311 | |
312 | return migrate_send_rp_message(mis, msg_type, msglen, bufc); | |
1e2d90eb DDAG |
313 | } |
314 | ||
aad555c2 ZC |
315 | static bool migration_colo_enabled; |
316 | bool migration_incoming_colo_enabled(void) | |
317 | { | |
318 | return migration_colo_enabled; | |
319 | } | |
320 | ||
321 | void migration_incoming_disable_colo(void) | |
322 | { | |
323 | migration_colo_enabled = false; | |
324 | } | |
325 | ||
326 | void migration_incoming_enable_colo(void) | |
327 | { | |
328 | migration_colo_enabled = true; | |
329 | } | |
330 | ||
43eaae28 | 331 | void qemu_start_incoming_migration(const char *uri, Error **errp) |
5bb7910a | 332 | { |
34c9dd8e AL |
333 | const char *p; |
334 | ||
3ab72385 | 335 | qapi_event_send_migration(MIGRATION_STATUS_SETUP); |
adde220a DDAG |
336 | if (!strcmp(uri, "defer")) { |
337 | deferred_incoming_migration(errp); | |
338 | } else if (strstart(uri, "tcp:", &p)) { | |
43eaae28 | 339 | tcp_start_incoming_migration(p, errp); |
2da776db | 340 | #ifdef CONFIG_RDMA |
adde220a | 341 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
342 | rdma_start_incoming_migration(p, errp); |
343 | #endif | |
adde220a | 344 | } else if (strstart(uri, "exec:", &p)) { |
43eaae28 | 345 | exec_start_incoming_migration(p, errp); |
adde220a | 346 | } else if (strstart(uri, "unix:", &p)) { |
43eaae28 | 347 | unix_start_incoming_migration(p, errp); |
adde220a | 348 | } else if (strstart(uri, "fd:", &p)) { |
43eaae28 | 349 | fd_start_incoming_migration(p, errp); |
adde220a | 350 | } else { |
312fd5f2 | 351 | error_setg(errp, "unknown migration protocol: %s", uri); |
8ca5e801 | 352 | } |
5bb7910a AL |
353 | } |
354 | ||
0aa6aefc DL |
355 | static void process_incoming_migration_bh(void *opaque) |
356 | { | |
357 | Error *local_err = NULL; | |
358 | MigrationIncomingState *mis = opaque; | |
359 | ||
0f073f44 DDAG |
360 | /* If capability late_block_activate is set: |
361 | * Only fire up the block code now if we're going to restart the | |
362 | * VM, else 'cont' will do it. | |
363 | * This causes file locking to happen; so we don't want it to happen | |
364 | * unless we really are starting the VM. | |
365 | */ | |
366 | if (!migrate_late_block_activate() || | |
367 | (autostart && (!global_state_received() || | |
368 | global_state_get_runstate() == RUN_STATE_RUNNING))) { | |
369 | /* Make sure all file formats flush their mutable metadata. | |
370 | * If we get an error here, just don't restart the VM yet. */ | |
371 | bdrv_invalidate_cache_all(&local_err); | |
372 | if (local_err) { | |
373 | error_report_err(local_err); | |
374 | local_err = NULL; | |
375 | autostart = false; | |
376 | } | |
d35ff5e6 KW |
377 | } |
378 | ||
0aa6aefc DL |
379 | /* |
380 | * This must happen after all error conditions are dealt with and | |
381 | * we're sure the VM is going to be running on this host. | |
382 | */ | |
7659505c | 383 | qemu_announce_self(&mis->announce_timer, migrate_announce_params()); |
0aa6aefc | 384 | |
f986c3d2 JQ |
385 | if (multifd_load_cleanup(&local_err) != 0) { |
386 | error_report_err(local_err); | |
387 | autostart = false; | |
388 | } | |
0aa6aefc DL |
389 | /* If global state section was not received or we are in running |
390 | state, we need to obey autostart. Any other state is set with | |
391 | runstate_set. */ | |
392 | ||
b35ebdf0 VSO |
393 | dirty_bitmap_mig_before_vm_start(); |
394 | ||
0aa6aefc DL |
395 | if (!global_state_received() || |
396 | global_state_get_runstate() == RUN_STATE_RUNNING) { | |
397 | if (autostart) { | |
398 | vm_start(); | |
399 | } else { | |
400 | runstate_set(RUN_STATE_PAUSED); | |
401 | } | |
402 | } else { | |
403 | runstate_set(global_state_get_runstate()); | |
404 | } | |
0aa6aefc DL |
405 | /* |
406 | * This must happen after any state changes since as soon as an external | |
407 | * observer sees this event they might start to prod at the VM assuming | |
408 | * it's ready to use. | |
409 | */ | |
410 | migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, | |
411 | MIGRATION_STATUS_COMPLETED); | |
412 | qemu_bh_delete(mis->bh); | |
413 | migration_incoming_state_destroy(); | |
414 | } | |
415 | ||
82a4da79 | 416 | static void process_incoming_migration_co(void *opaque) |
511c0231 | 417 | { |
b4b076da | 418 | MigrationIncomingState *mis = migration_incoming_get_current(); |
e9bef235 | 419 | PostcopyState ps; |
1c12e1f5 | 420 | int ret; |
8e48ac95 | 421 | Error *local_err = NULL; |
1c12e1f5 | 422 | |
4f0fae7f | 423 | assert(mis->from_src_file); |
92370989 | 424 | mis->migration_incoming_co = qemu_coroutine_self(); |
67f11b5c | 425 | mis->largest_page_size = qemu_ram_pagesize_largest(); |
093e3c42 | 426 | postcopy_state_set(POSTCOPY_INCOMING_NONE); |
93d7af6f HZ |
427 | migrate_set_state(&mis->state, MIGRATION_STATUS_NONE, |
428 | MIGRATION_STATUS_ACTIVE); | |
4f0fae7f | 429 | ret = qemu_loadvm_state(mis->from_src_file); |
bca7856a | 430 | |
e9bef235 DDAG |
431 | ps = postcopy_state_get(); |
432 | trace_process_incoming_migration_co_end(ret, ps); | |
433 | if (ps != POSTCOPY_INCOMING_NONE) { | |
434 | if (ps == POSTCOPY_INCOMING_ADVISE) { | |
435 | /* | |
436 | * Where a migration had postcopy enabled (and thus went to advise) | |
437 | * but managed to complete within the precopy period, we can use | |
438 | * the normal exit. | |
439 | */ | |
440 | postcopy_ram_incoming_cleanup(mis); | |
441 | } else if (ret >= 0) { | |
442 | /* | |
443 | * Postcopy was started, cleanup should happen at the end of the | |
444 | * postcopy thread. | |
445 | */ | |
446 | trace_process_incoming_migration_co_postcopy_end_main(); | |
447 | return; | |
448 | } | |
449 | /* Else if something went wrong then just fall out of the normal exit */ | |
450 | } | |
451 | ||
25d0c16f | 452 | /* we get COLO info, and know if we are in COLO mode */ |
aad555c2 | 453 | if (!ret && migration_incoming_colo_enabled()) { |
8e48ac95 ZC |
454 | /* Make sure all file formats flush their mutable metadata */ |
455 | bdrv_invalidate_cache_all(&local_err); | |
456 | if (local_err) { | |
8e48ac95 | 457 | error_report_err(local_err); |
6d99c2d4 | 458 | goto fail; |
8e48ac95 ZC |
459 | } |
460 | ||
13af18f2 ZC |
461 | if (colo_init_ram_cache() < 0) { |
462 | error_report("Init ram cache failed"); | |
6d99c2d4 | 463 | goto fail; |
13af18f2 ZC |
464 | } |
465 | ||
25d0c16f HZ |
466 | qemu_thread_create(&mis->colo_incoming_thread, "COLO incoming", |
467 | colo_process_incoming_thread, mis, QEMU_THREAD_JOINABLE); | |
468 | mis->have_colo_incoming_thread = true; | |
469 | qemu_coroutine_yield(); | |
470 | ||
471 | /* Wait checkpoint incoming thread exit before free resource */ | |
472 | qemu_thread_join(&mis->colo_incoming_thread); | |
13af18f2 ZC |
473 | /* We hold the global iothread lock, so it is safe here */ |
474 | colo_release_ram_cache(); | |
25d0c16f HZ |
475 | } |
476 | ||
1c12e1f5 | 477 | if (ret < 0) { |
db80face | 478 | error_report("load of migration failed: %s", strerror(-ret)); |
6d99c2d4 | 479 | goto fail; |
511c0231 | 480 | } |
0aa6aefc DL |
481 | mis->bh = qemu_bh_new(process_incoming_migration_bh, mis); |
482 | qemu_bh_schedule(mis->bh); | |
92370989 | 483 | mis->migration_incoming_co = NULL; |
6d99c2d4 FL |
484 | return; |
485 | fail: | |
486 | local_err = NULL; | |
487 | migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, | |
488 | MIGRATION_STATUS_FAILED); | |
489 | qemu_fclose(mis->from_src_file); | |
490 | if (multifd_load_cleanup(&local_err) != 0) { | |
491 | error_report_err(local_err); | |
492 | } | |
493 | exit(EXIT_FAILURE); | |
511c0231 JQ |
494 | } |
495 | ||
e595a01a | 496 | static void migration_incoming_setup(QEMUFile *f) |
82a4da79 | 497 | { |
4f0fae7f | 498 | MigrationIncomingState *mis = migration_incoming_get_current(); |
82a4da79 | 499 | |
f986c3d2 JQ |
500 | if (multifd_load_setup() != 0) { |
501 | /* We haven't been able to create multifd threads | |
502 | nothing better to do */ | |
503 | exit(EXIT_FAILURE); | |
504 | } | |
505 | ||
4f0fae7f JQ |
506 | if (!mis->from_src_file) { |
507 | mis->from_src_file = f; | |
508 | } | |
06ad5135 | 509 | qemu_file_set_blocking(f, false); |
e595a01a JQ |
510 | } |
511 | ||
36c2f8be | 512 | void migration_incoming_process(void) |
e595a01a JQ |
513 | { |
514 | Coroutine *co = qemu_coroutine_create(process_incoming_migration_co, NULL); | |
0b8b8753 | 515 | qemu_coroutine_enter(co); |
82a4da79 PB |
516 | } |
517 | ||
884835fa PX |
518 | /* Returns true if recovered from a paused migration, otherwise false */ |
519 | static bool postcopy_try_recover(QEMUFile *f) | |
e595a01a | 520 | { |
d96c9e8d PX |
521 | MigrationIncomingState *mis = migration_incoming_get_current(); |
522 | ||
523 | if (mis->state == MIGRATION_STATUS_POSTCOPY_PAUSED) { | |
524 | /* Resumed from a paused postcopy migration */ | |
525 | ||
526 | mis->from_src_file = f; | |
527 | /* Postcopy has standalone thread to do vm load */ | |
528 | qemu_file_set_blocking(f, true); | |
529 | ||
530 | /* Re-configure the return path */ | |
531 | mis->to_src_file = qemu_file_get_return_path(f); | |
532 | ||
533 | migrate_set_state(&mis->state, MIGRATION_STATUS_POSTCOPY_PAUSED, | |
534 | MIGRATION_STATUS_POSTCOPY_RECOVER); | |
535 | ||
536 | /* | |
537 | * Here, we only wake up the main loading thread (while the | |
538 | * fault thread will still be waiting), so that we can receive | |
539 | * commands from source now, and answer it if needed. The | |
540 | * fault thread will be woken up afterwards until we are sure | |
541 | * that source is ready to reply to page requests. | |
542 | */ | |
543 | qemu_sem_post(&mis->postcopy_pause_sem_dst); | |
884835fa PX |
544 | return true; |
545 | } | |
546 | ||
547 | return false; | |
548 | } | |
549 | ||
550 | void migration_fd_process_incoming(QEMUFile *f) | |
551 | { | |
552 | if (postcopy_try_recover(f)) { | |
553 | return; | |
d96c9e8d | 554 | } |
884835fa PX |
555 | |
556 | migration_incoming_setup(f); | |
557 | migration_incoming_process(); | |
e595a01a JQ |
558 | } |
559 | ||
49ed0d24 | 560 | void migration_ioc_process_incoming(QIOChannel *ioc, Error **errp) |
4f0fae7f JQ |
561 | { |
562 | MigrationIncomingState *mis = migration_incoming_get_current(); | |
a429e7f4 | 563 | bool start_migration; |
4f0fae7f JQ |
564 | |
565 | if (!mis->from_src_file) { | |
a429e7f4 | 566 | /* The first connection (multifd may have multiple) */ |
4f0fae7f | 567 | QEMUFile *f = qemu_fopen_channel_input(ioc); |
a429e7f4 PX |
568 | |
569 | /* If it's a recovery, we're done */ | |
884835fa PX |
570 | if (postcopy_try_recover(f)) { |
571 | return; | |
572 | } | |
a429e7f4 | 573 | |
36c2f8be | 574 | migration_incoming_setup(f); |
a429e7f4 PX |
575 | |
576 | /* | |
577 | * Common migration only needs one channel, so we can start | |
578 | * right now. Multifd needs more than one channel, we wait. | |
579 | */ | |
580 | start_migration = !migrate_use_multifd(); | |
581 | } else { | |
49ed0d24 | 582 | Error *local_err = NULL; |
a429e7f4 PX |
583 | /* Multiple connections */ |
584 | assert(migrate_use_multifd()); | |
49ed0d24 FL |
585 | start_migration = multifd_recv_new_channel(ioc, &local_err); |
586 | if (local_err) { | |
587 | error_propagate(errp, local_err); | |
588 | return; | |
589 | } | |
4f0fae7f | 590 | } |
81e62053 | 591 | |
a429e7f4 | 592 | if (start_migration) { |
81e62053 PX |
593 | migration_incoming_process(); |
594 | } | |
4f0fae7f JQ |
595 | } |
596 | ||
428d8908 JQ |
597 | /** |
598 | * @migration_has_all_channels: We have received all channels that we need | |
599 | * | |
600 | * Returns true when we have got connections to all the channels that | |
601 | * we need for migration. | |
602 | */ | |
603 | bool migration_has_all_channels(void) | |
604 | { | |
ca273df3 | 605 | MigrationIncomingState *mis = migration_incoming_get_current(); |
62c1e0ca JQ |
606 | bool all_channels; |
607 | ||
608 | all_channels = multifd_recv_all_channels_created(); | |
609 | ||
ca273df3 | 610 | return all_channels && mis->from_src_file != NULL; |
428d8908 JQ |
611 | } |
612 | ||
6decec93 DDAG |
613 | /* |
614 | * Send a 'SHUT' message on the return channel with the given value | |
615 | * to indicate that we've finished with the RP. Non-0 value indicates | |
616 | * error. | |
617 | */ | |
618 | void migrate_send_rp_shut(MigrationIncomingState *mis, | |
619 | uint32_t value) | |
620 | { | |
621 | uint32_t buf; | |
622 | ||
623 | buf = cpu_to_be32(value); | |
624 | migrate_send_rp_message(mis, MIG_RP_MSG_SHUT, sizeof(buf), &buf); | |
625 | } | |
626 | ||
627 | /* | |
628 | * Send a 'PONG' message on the return channel with the given value | |
629 | * (normally in response to a 'PING') | |
630 | */ | |
631 | void migrate_send_rp_pong(MigrationIncomingState *mis, | |
632 | uint32_t value) | |
633 | { | |
634 | uint32_t buf; | |
635 | ||
636 | buf = cpu_to_be32(value); | |
637 | migrate_send_rp_message(mis, MIG_RP_MSG_PONG, sizeof(buf), &buf); | |
638 | } | |
639 | ||
a335debb PX |
640 | void migrate_send_rp_recv_bitmap(MigrationIncomingState *mis, |
641 | char *block_name) | |
642 | { | |
643 | char buf[512]; | |
644 | int len; | |
645 | int64_t res; | |
646 | ||
647 | /* | |
648 | * First, we send the header part. It contains only the len of | |
649 | * idstr, and the idstr itself. | |
650 | */ | |
651 | len = strlen(block_name); | |
652 | buf[0] = len; | |
653 | memcpy(buf + 1, block_name, len); | |
654 | ||
655 | if (mis->state != MIGRATION_STATUS_POSTCOPY_RECOVER) { | |
656 | error_report("%s: MSG_RP_RECV_BITMAP only used for recovery", | |
657 | __func__); | |
658 | return; | |
659 | } | |
660 | ||
661 | migrate_send_rp_message(mis, MIG_RP_MSG_RECV_BITMAP, len + 1, buf); | |
662 | ||
663 | /* | |
664 | * Next, we dump the received bitmap to the stream. | |
665 | * | |
666 | * TODO: currently we are safe since we are the only one that is | |
667 | * using the to_src_file handle (fault thread is still paused), | |
668 | * and it's ok even not taking the mutex. However the best way is | |
669 | * to take the lock before sending the message header, and release | |
670 | * the lock after sending the bitmap. | |
671 | */ | |
672 | qemu_mutex_lock(&mis->rp_mutex); | |
673 | res = ramblock_recv_bitmap_send(mis->to_src_file, block_name); | |
674 | qemu_mutex_unlock(&mis->rp_mutex); | |
675 | ||
676 | trace_migrate_send_rp_recv_bitmap(block_name, res); | |
677 | } | |
678 | ||
13955b89 PX |
679 | void migrate_send_rp_resume_ack(MigrationIncomingState *mis, uint32_t value) |
680 | { | |
681 | uint32_t buf; | |
682 | ||
683 | buf = cpu_to_be32(value); | |
684 | migrate_send_rp_message(mis, MIG_RP_MSG_RESUME_ACK, sizeof(buf), &buf); | |
685 | } | |
686 | ||
bbf6da32 OW |
687 | MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) |
688 | { | |
689 | MigrationCapabilityStatusList *head = NULL; | |
690 | MigrationCapabilityStatusList *caps; | |
691 | MigrationState *s = migrate_get_current(); | |
692 | int i; | |
693 | ||
387eedeb | 694 | caps = NULL; /* silence compiler warning */ |
7fb1cf16 | 695 | for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { |
ed1701c6 DDAG |
696 | #ifndef CONFIG_LIVE_BLOCK_MIGRATION |
697 | if (i == MIGRATION_CAPABILITY_BLOCK) { | |
698 | continue; | |
699 | } | |
700 | #endif | |
bbf6da32 OW |
701 | if (head == NULL) { |
702 | head = g_malloc0(sizeof(*caps)); | |
703 | caps = head; | |
704 | } else { | |
705 | caps->next = g_malloc0(sizeof(*caps)); | |
706 | caps = caps->next; | |
707 | } | |
708 | caps->value = | |
709 | g_malloc(sizeof(*caps->value)); | |
710 | caps->value->capability = i; | |
711 | caps->value->state = s->enabled_capabilities[i]; | |
712 | } | |
713 | ||
714 | return head; | |
715 | } | |
716 | ||
85de8323 LL |
717 | MigrationParameters *qmp_query_migrate_parameters(Error **errp) |
718 | { | |
719 | MigrationParameters *params; | |
720 | MigrationState *s = migrate_get_current(); | |
721 | ||
e87fae4c | 722 | /* TODO use QAPI_CLONE() instead of duplicating it inline */ |
85de8323 | 723 | params = g_malloc0(sizeof(*params)); |
de63ab61 | 724 | params->has_compress_level = true; |
2594f56d | 725 | params->compress_level = s->parameters.compress_level; |
de63ab61 | 726 | params->has_compress_threads = true; |
2594f56d | 727 | params->compress_threads = s->parameters.compress_threads; |
1d58872a XG |
728 | params->has_compress_wait_thread = true; |
729 | params->compress_wait_thread = s->parameters.compress_wait_thread; | |
de63ab61 | 730 | params->has_decompress_threads = true; |
2594f56d | 731 | params->decompress_threads = s->parameters.decompress_threads; |
de63ab61 | 732 | params->has_cpu_throttle_initial = true; |
2594f56d | 733 | params->cpu_throttle_initial = s->parameters.cpu_throttle_initial; |
de63ab61 | 734 | params->has_cpu_throttle_increment = true; |
2594f56d | 735 | params->cpu_throttle_increment = s->parameters.cpu_throttle_increment; |
8cc99dcd | 736 | params->has_tls_creds = true; |
69ef1f36 | 737 | params->tls_creds = g_strdup(s->parameters.tls_creds); |
8cc99dcd | 738 | params->has_tls_hostname = true; |
69ef1f36 | 739 | params->tls_hostname = g_strdup(s->parameters.tls_hostname); |
2ff30257 AA |
740 | params->has_max_bandwidth = true; |
741 | params->max_bandwidth = s->parameters.max_bandwidth; | |
742 | params->has_downtime_limit = true; | |
743 | params->downtime_limit = s->parameters.downtime_limit; | |
fe39a4d4 | 744 | params->has_x_checkpoint_delay = true; |
68b53591 | 745 | params->x_checkpoint_delay = s->parameters.x_checkpoint_delay; |
2833c59b JQ |
746 | params->has_block_incremental = true; |
747 | params->block_incremental = s->parameters.block_incremental; | |
4075fb1c JQ |
748 | params->has_x_multifd_channels = true; |
749 | params->x_multifd_channels = s->parameters.x_multifd_channels; | |
0fb86605 JQ |
750 | params->has_x_multifd_page_count = true; |
751 | params->x_multifd_page_count = s->parameters.x_multifd_page_count; | |
73af8dd8 JQ |
752 | params->has_xbzrle_cache_size = true; |
753 | params->xbzrle_cache_size = s->parameters.xbzrle_cache_size; | |
7e555c6c DDAG |
754 | params->has_max_postcopy_bandwidth = true; |
755 | params->max_postcopy_bandwidth = s->parameters.max_postcopy_bandwidth; | |
4cbc9c7f LQ |
756 | params->has_max_cpu_throttle = true; |
757 | params->max_cpu_throttle = s->parameters.max_cpu_throttle; | |
ee3d96ba DDAG |
758 | params->has_announce_initial = true; |
759 | params->announce_initial = s->parameters.announce_initial; | |
760 | params->has_announce_max = true; | |
761 | params->announce_max = s->parameters.announce_max; | |
762 | params->has_announce_rounds = true; | |
763 | params->announce_rounds = s->parameters.announce_rounds; | |
764 | params->has_announce_step = true; | |
765 | params->announce_step = s->parameters.announce_step; | |
85de8323 LL |
766 | |
767 | return params; | |
768 | } | |
769 | ||
ee3d96ba DDAG |
770 | AnnounceParameters *migrate_announce_params(void) |
771 | { | |
772 | static AnnounceParameters ap; | |
773 | ||
774 | MigrationState *s = migrate_get_current(); | |
775 | ||
776 | ap.initial = s->parameters.announce_initial; | |
777 | ap.max = s->parameters.announce_max; | |
778 | ap.rounds = s->parameters.announce_rounds; | |
779 | ap.step = s->parameters.announce_step; | |
780 | ||
781 | return ≈ | |
782 | } | |
783 | ||
f6844b99 DDAG |
784 | /* |
785 | * Return true if we're already in the middle of a migration | |
786 | * (i.e. any of the active or setup states) | |
787 | */ | |
3d63da16 | 788 | bool migration_is_setup_or_active(int state) |
f6844b99 DDAG |
789 | { |
790 | switch (state) { | |
791 | case MIGRATION_STATUS_ACTIVE: | |
9ec055ae | 792 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: |
a688d2c1 | 793 | case MIGRATION_STATUS_POSTCOPY_PAUSED: |
135b87b4 | 794 | case MIGRATION_STATUS_POSTCOPY_RECOVER: |
f6844b99 | 795 | case MIGRATION_STATUS_SETUP: |
31e06077 DDAG |
796 | case MIGRATION_STATUS_PRE_SWITCHOVER: |
797 | case MIGRATION_STATUS_DEVICE: | |
f6844b99 DDAG |
798 | return true; |
799 | ||
800 | default: | |
801 | return false; | |
802 | ||
803 | } | |
804 | } | |
805 | ||
a22463a5 DDAG |
806 | static void populate_ram_info(MigrationInfo *info, MigrationState *s) |
807 | { | |
808 | info->has_ram = true; | |
809 | info->ram = g_malloc0(sizeof(*info->ram)); | |
9360447d | 810 | info->ram->transferred = ram_counters.transferred; |
a22463a5 | 811 | info->ram->total = ram_bytes_total(); |
9360447d | 812 | info->ram->duplicate = ram_counters.duplicate; |
bedf53c1 JQ |
813 | /* legacy value. It is not used anymore */ |
814 | info->ram->skipped = 0; | |
9360447d JQ |
815 | info->ram->normal = ram_counters.normal; |
816 | info->ram->normal_bytes = ram_counters.normal * | |
20afaed9 | 817 | qemu_target_page_size(); |
a22463a5 | 818 | info->ram->mbps = s->mbps; |
9360447d JQ |
819 | info->ram->dirty_sync_count = ram_counters.dirty_sync_count; |
820 | info->ram->postcopy_requests = ram_counters.postcopy_requests; | |
030ce1f8 | 821 | info->ram->page_size = qemu_target_page_size(); |
a61c45bd | 822 | info->ram->multifd_bytes = ram_counters.multifd_bytes; |
aecbfe9c | 823 | info->ram->pages_per_second = s->pages_per_second; |
a22463a5 | 824 | |
114f5aee JQ |
825 | if (migrate_use_xbzrle()) { |
826 | info->has_xbzrle_cache = true; | |
827 | info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache)); | |
828 | info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size(); | |
9360447d JQ |
829 | info->xbzrle_cache->bytes = xbzrle_counters.bytes; |
830 | info->xbzrle_cache->pages = xbzrle_counters.pages; | |
831 | info->xbzrle_cache->cache_miss = xbzrle_counters.cache_miss; | |
832 | info->xbzrle_cache->cache_miss_rate = xbzrle_counters.cache_miss_rate; | |
833 | info->xbzrle_cache->overflow = xbzrle_counters.overflow; | |
114f5aee JQ |
834 | } |
835 | ||
76e03000 XG |
836 | if (migrate_use_compression()) { |
837 | info->has_compression = true; | |
838 | info->compression = g_malloc0(sizeof(*info->compression)); | |
839 | info->compression->pages = compression_counters.pages; | |
840 | info->compression->busy = compression_counters.busy; | |
841 | info->compression->busy_rate = compression_counters.busy_rate; | |
842 | info->compression->compressed_size = | |
843 | compression_counters.compressed_size; | |
844 | info->compression->compression_rate = | |
845 | compression_counters.compression_rate; | |
846 | } | |
847 | ||
338182c8 JQ |
848 | if (cpu_throttle_active()) { |
849 | info->has_cpu_throttle_percentage = true; | |
850 | info->cpu_throttle_percentage = cpu_throttle_get_percentage(); | |
851 | } | |
852 | ||
a22463a5 DDAG |
853 | if (s->state != MIGRATION_STATUS_COMPLETED) { |
854 | info->ram->remaining = ram_bytes_remaining(); | |
9360447d | 855 | info->ram->dirty_pages_rate = ram_counters.dirty_pages_rate; |
a22463a5 DDAG |
856 | } |
857 | } | |
858 | ||
930ac04c JQ |
859 | static void populate_disk_info(MigrationInfo *info) |
860 | { | |
861 | if (blk_mig_active()) { | |
862 | info->has_disk = true; | |
863 | info->disk = g_malloc0(sizeof(*info->disk)); | |
864 | info->disk->transferred = blk_mig_bytes_transferred(); | |
865 | info->disk->remaining = blk_mig_bytes_remaining(); | |
866 | info->disk->total = blk_mig_bytes_total(); | |
867 | } | |
868 | } | |
869 | ||
65ace060 | 870 | static void fill_source_migration_info(MigrationInfo *info) |
5bb7910a | 871 | { |
17549e84 JQ |
872 | MigrationState *s = migrate_get_current(); |
873 | ||
874 | switch (s->state) { | |
31194731 | 875 | case MIGRATION_STATUS_NONE: |
17549e84 | 876 | /* no migration has happened ever */ |
65ace060 AP |
877 | /* do not overwrite destination migration status */ |
878 | return; | |
17549e84 | 879 | break; |
31194731 | 880 | case MIGRATION_STATUS_SETUP: |
29ae8a41 | 881 | info->has_status = true; |
ed4fbd10 | 882 | info->has_total_time = false; |
29ae8a41 | 883 | break; |
31194731 HZ |
884 | case MIGRATION_STATUS_ACTIVE: |
885 | case MIGRATION_STATUS_CANCELLING: | |
9ec055ae | 886 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: |
31e06077 DDAG |
887 | case MIGRATION_STATUS_PRE_SWITCHOVER: |
888 | case MIGRATION_STATUS_DEVICE: | |
a688d2c1 | 889 | case MIGRATION_STATUS_POSTCOPY_PAUSED: |
135b87b4 | 890 | case MIGRATION_STATUS_POSTCOPY_RECOVER: |
c8f9f4f4 | 891 | /* TODO add some postcopy stats */ |
9ec055ae DDAG |
892 | info->has_status = true; |
893 | info->has_total_time = true; | |
894 | info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) | |
4af246a3 | 895 | - s->start_time; |
9ec055ae DDAG |
896 | info->has_expected_downtime = true; |
897 | info->expected_downtime = s->expected_downtime; | |
898 | info->has_setup_time = true; | |
899 | info->setup_time = s->setup_time; | |
900 | ||
a22463a5 | 901 | populate_ram_info(info, s); |
930ac04c | 902 | populate_disk_info(info); |
17549e84 | 903 | break; |
0b827d5e HZ |
904 | case MIGRATION_STATUS_COLO: |
905 | info->has_status = true; | |
906 | /* TODO: display COLO specific information (checkpoint info etc.) */ | |
907 | break; | |
31194731 | 908 | case MIGRATION_STATUS_COMPLETED: |
791e7c82 | 909 | info->has_status = true; |
00c14997 | 910 | info->has_total_time = true; |
7aa939af | 911 | info->total_time = s->total_time; |
9c5a9fcf JQ |
912 | info->has_downtime = true; |
913 | info->downtime = s->downtime; | |
ed4fbd10 MH |
914 | info->has_setup_time = true; |
915 | info->setup_time = s->setup_time; | |
d5f8a570 | 916 | |
a22463a5 | 917 | populate_ram_info(info, s); |
17549e84 | 918 | break; |
31194731 | 919 | case MIGRATION_STATUS_FAILED: |
791e7c82 | 920 | info->has_status = true; |
d59ce6f3 DB |
921 | if (s->error) { |
922 | info->has_error_desc = true; | |
923 | info->error_desc = g_strdup(error_get_pretty(s->error)); | |
924 | } | |
17549e84 | 925 | break; |
31194731 | 926 | case MIGRATION_STATUS_CANCELLED: |
791e7c82 | 927 | info->has_status = true; |
17549e84 | 928 | break; |
5bb7910a | 929 | } |
cde63fbe | 930 | info->status = s->state; |
5bb7910a AL |
931 | } |
932 | ||
4a84214e PX |
933 | /** |
934 | * @migration_caps_check - check capability validity | |
935 | * | |
936 | * @cap_list: old capability list, array of bool | |
937 | * @params: new capabilities to be applied soon | |
938 | * @errp: set *errp if the check failed, with reason | |
939 | * | |
940 | * Returns true if check passed, otherwise false. | |
941 | */ | |
942 | static bool migrate_caps_check(bool *cap_list, | |
943 | MigrationCapabilityStatusList *params, | |
944 | Error **errp) | |
00458433 | 945 | { |
00458433 | 946 | MigrationCapabilityStatusList *cap; |
4a84214e | 947 | bool old_postcopy_cap; |
d7651f15 | 948 | MigrationIncomingState *mis = migration_incoming_get_current(); |
00458433 | 949 | |
4a84214e | 950 | old_postcopy_cap = cap_list[MIGRATION_CAPABILITY_POSTCOPY_RAM]; |
00458433 OW |
951 | |
952 | for (cap = params; cap; cap = cap->next) { | |
4a84214e PX |
953 | cap_list[cap->value->capability] = cap->value->state; |
954 | } | |
955 | ||
ed1701c6 | 956 | #ifndef CONFIG_LIVE_BLOCK_MIGRATION |
4a84214e PX |
957 | if (cap_list[MIGRATION_CAPABILITY_BLOCK]) { |
958 | error_setg(errp, "QEMU compiled without old-style (blk/-b, inc/-i) " | |
959 | "block migration"); | |
960 | error_append_hint(errp, "Use drive_mirror+NBD instead.\n"); | |
961 | return false; | |
00458433 | 962 | } |
4a84214e | 963 | #endif |
53dd370c | 964 | |
7e934f5b ZC |
965 | #ifndef CONFIG_REPLICATION |
966 | if (cap_list[MIGRATION_CAPABILITY_X_COLO]) { | |
967 | error_setg(errp, "QEMU compiled without replication module" | |
968 | " can't enable COLO"); | |
969 | error_append_hint(errp, "Please enable replication before COLO.\n"); | |
970 | return false; | |
971 | } | |
972 | #endif | |
973 | ||
4a84214e PX |
974 | if (cap_list[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { |
975 | if (cap_list[MIGRATION_CAPABILITY_COMPRESS]) { | |
53dd370c DDAG |
976 | /* The decompression threads asynchronously write into RAM |
977 | * rather than use the atomic copies needed to avoid | |
978 | * userfaulting. It should be possible to fix the decompression | |
979 | * threads for compatibility in future. | |
980 | */ | |
4a84214e PX |
981 | error_setg(errp, "Postcopy is not currently compatible " |
982 | "with compression"); | |
983 | return false; | |
53dd370c | 984 | } |
4a84214e | 985 | |
096631bd DDAG |
986 | /* This check is reasonably expensive, so only when it's being |
987 | * set the first time, also it's only the destination that needs | |
988 | * special support. | |
989 | */ | |
990 | if (!old_postcopy_cap && runstate_check(RUN_STATE_INMIGRATE) && | |
d7651f15 | 991 | !postcopy_ram_supported_by_host(mis)) { |
096631bd DDAG |
992 | /* postcopy_ram_supported_by_host will have emitted a more |
993 | * detailed message | |
994 | */ | |
4a84214e PX |
995 | error_setg(errp, "Postcopy is not supported"); |
996 | return false; | |
096631bd | 997 | } |
18269069 YK |
998 | |
999 | if (cap_list[MIGRATION_CAPABILITY_X_IGNORE_SHARED]) { | |
1000 | error_setg(errp, "Postcopy is not compatible with ignore-shared"); | |
1001 | return false; | |
1002 | } | |
53dd370c | 1003 | } |
4a84214e PX |
1004 | |
1005 | return true; | |
1006 | } | |
1007 | ||
65ace060 AP |
1008 | static void fill_destination_migration_info(MigrationInfo *info) |
1009 | { | |
1010 | MigrationIncomingState *mis = migration_incoming_get_current(); | |
1011 | ||
1012 | switch (mis->state) { | |
1013 | case MIGRATION_STATUS_NONE: | |
1014 | return; | |
1015 | break; | |
1016 | case MIGRATION_STATUS_SETUP: | |
1017 | case MIGRATION_STATUS_CANCELLING: | |
1018 | case MIGRATION_STATUS_CANCELLED: | |
1019 | case MIGRATION_STATUS_ACTIVE: | |
1020 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: | |
3c9928d9 PX |
1021 | case MIGRATION_STATUS_POSTCOPY_PAUSED: |
1022 | case MIGRATION_STATUS_POSTCOPY_RECOVER: | |
65ace060 AP |
1023 | case MIGRATION_STATUS_FAILED: |
1024 | case MIGRATION_STATUS_COLO: | |
1025 | info->has_status = true; | |
1026 | break; | |
1027 | case MIGRATION_STATUS_COMPLETED: | |
1028 | info->has_status = true; | |
1029 | fill_destination_postcopy_migration_info(info); | |
1030 | break; | |
1031 | } | |
1032 | info->status = mis->state; | |
1033 | } | |
1034 | ||
1035 | MigrationInfo *qmp_query_migrate(Error **errp) | |
1036 | { | |
1037 | MigrationInfo *info = g_malloc0(sizeof(*info)); | |
1038 | ||
1039 | fill_destination_migration_info(info); | |
1040 | fill_source_migration_info(info); | |
1041 | ||
1042 | return info; | |
1043 | } | |
1044 | ||
4a84214e PX |
1045 | void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, |
1046 | Error **errp) | |
1047 | { | |
1048 | MigrationState *s = migrate_get_current(); | |
1049 | MigrationCapabilityStatusList *cap; | |
dd0ee30c | 1050 | bool cap_list[MIGRATION_CAPABILITY__MAX]; |
4a84214e PX |
1051 | |
1052 | if (migration_is_setup_or_active(s->state)) { | |
1053 | error_setg(errp, QERR_MIGRATION_ACTIVE); | |
1054 | return; | |
1055 | } | |
1056 | ||
dd0ee30c PX |
1057 | memcpy(cap_list, s->enabled_capabilities, sizeof(cap_list)); |
1058 | if (!migrate_caps_check(cap_list, params, errp)) { | |
4a84214e PX |
1059 | return; |
1060 | } | |
1061 | ||
1062 | for (cap = params; cap; cap = cap->next) { | |
1063 | s->enabled_capabilities[cap->value->capability] = cap->value->state; | |
1064 | } | |
00458433 OW |
1065 | } |
1066 | ||
16d063bc PX |
1067 | /* |
1068 | * Check whether the parameters are valid. Error will be put into errp | |
1069 | * (if provided). Return true if valid, otherwise false. | |
1070 | */ | |
1071 | static bool migrate_params_check(MigrationParameters *params, Error **errp) | |
85de8323 | 1072 | { |
7f375e04 | 1073 | if (params->has_compress_level && |
741d4086 | 1074 | (params->compress_level > 9)) { |
c6bd8c70 MA |
1075 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level", |
1076 | "is invalid, it should be in the range of 0 to 9"); | |
16d063bc | 1077 | return false; |
85de8323 | 1078 | } |
16d063bc | 1079 | |
741d4086 | 1080 | if (params->has_compress_threads && (params->compress_threads < 1)) { |
c6bd8c70 MA |
1081 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
1082 | "compress_threads", | |
1083 | "is invalid, it should be in the range of 1 to 255"); | |
16d063bc | 1084 | return false; |
85de8323 | 1085 | } |
16d063bc | 1086 | |
741d4086 | 1087 | if (params->has_decompress_threads && (params->decompress_threads < 1)) { |
c6bd8c70 MA |
1088 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
1089 | "decompress_threads", | |
1090 | "is invalid, it should be in the range of 1 to 255"); | |
16d063bc | 1091 | return false; |
85de8323 | 1092 | } |
16d063bc | 1093 | |
7f375e04 EB |
1094 | if (params->has_cpu_throttle_initial && |
1095 | (params->cpu_throttle_initial < 1 || | |
1096 | params->cpu_throttle_initial > 99)) { | |
1626fee3 | 1097 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
d85a31d1 | 1098 | "cpu_throttle_initial", |
1626fee3 | 1099 | "an integer in the range of 1 to 99"); |
16d063bc | 1100 | return false; |
1626fee3 | 1101 | } |
16d063bc | 1102 | |
7f375e04 EB |
1103 | if (params->has_cpu_throttle_increment && |
1104 | (params->cpu_throttle_increment < 1 || | |
1105 | params->cpu_throttle_increment > 99)) { | |
1626fee3 | 1106 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
d85a31d1 | 1107 | "cpu_throttle_increment", |
1626fee3 | 1108 | "an integer in the range of 1 to 99"); |
16d063bc | 1109 | return false; |
1626fee3 | 1110 | } |
16d063bc | 1111 | |
741d4086 | 1112 | if (params->has_max_bandwidth && (params->max_bandwidth > SIZE_MAX)) { |
2ff30257 AA |
1113 | error_setg(errp, "Parameter 'max_bandwidth' expects an integer in the" |
1114 | " range of 0 to %zu bytes/second", SIZE_MAX); | |
16d063bc | 1115 | return false; |
2ff30257 | 1116 | } |
16d063bc | 1117 | |
2ff30257 | 1118 | if (params->has_downtime_limit && |
741d4086 | 1119 | (params->downtime_limit > MAX_MIGRATE_DOWNTIME)) { |
87c9cc1c DHB |
1120 | error_setg(errp, "Parameter 'downtime_limit' expects an integer in " |
1121 | "the range of 0 to %d milliseconds", | |
1122 | MAX_MIGRATE_DOWNTIME); | |
16d063bc | 1123 | return false; |
2ff30257 | 1124 | } |
16d063bc | 1125 | |
741d4086 JQ |
1126 | /* x_checkpoint_delay is now always positive */ |
1127 | ||
1128 | if (params->has_x_multifd_channels && (params->x_multifd_channels < 1)) { | |
4075fb1c JQ |
1129 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
1130 | "multifd_channels", | |
1131 | "is invalid, it should be in the range of 1 to 255"); | |
1132 | return false; | |
1133 | } | |
0fb86605 | 1134 | if (params->has_x_multifd_page_count && |
741d4086 JQ |
1135 | (params->x_multifd_page_count < 1 || |
1136 | params->x_multifd_page_count > 10000)) { | |
0fb86605 JQ |
1137 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
1138 | "multifd_page_count", | |
1139 | "is invalid, it should be in the range of 1 to 10000"); | |
1140 | return false; | |
1141 | } | |
16d063bc | 1142 | |
73af8dd8 JQ |
1143 | if (params->has_xbzrle_cache_size && |
1144 | (params->xbzrle_cache_size < qemu_target_page_size() || | |
1145 | !is_power_of_2(params->xbzrle_cache_size))) { | |
1146 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1147 | "xbzrle_cache_size", | |
1148 | "is invalid, it should be bigger than target page size" | |
1149 | " and a power of two"); | |
1150 | return false; | |
1151 | } | |
1152 | ||
4cbc9c7f LQ |
1153 | if (params->has_max_cpu_throttle && |
1154 | (params->max_cpu_throttle < params->cpu_throttle_initial || | |
1155 | params->max_cpu_throttle > 99)) { | |
1156 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1157 | "max_cpu_throttle", | |
1158 | "an integer in the range of cpu_throttle_initial to 99"); | |
1159 | return false; | |
1160 | } | |
1161 | ||
ee3d96ba DDAG |
1162 | if (params->has_announce_initial && |
1163 | params->announce_initial > 100000) { | |
1164 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1165 | "announce_initial", | |
1166 | "is invalid, it must be less than 100000 ms"); | |
1167 | return false; | |
1168 | } | |
1169 | if (params->has_announce_max && | |
1170 | params->announce_max > 100000) { | |
1171 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1172 | "announce_max", | |
1173 | "is invalid, it must be less than 100000 ms"); | |
1174 | return false; | |
1175 | } | |
1176 | if (params->has_announce_rounds && | |
1177 | params->announce_rounds > 1000) { | |
1178 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1179 | "announce_rounds", | |
1180 | "is invalid, it must be in the range of 0 to 1000"); | |
1181 | return false; | |
1182 | } | |
1183 | if (params->has_announce_step && | |
1184 | (params->announce_step < 1 || | |
1185 | params->announce_step > 10000)) { | |
1186 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1187 | "announce_step", | |
1188 | "is invalid, it must be in the range of 1 to 10000 ms"); | |
1189 | return false; | |
1190 | } | |
16d063bc PX |
1191 | return true; |
1192 | } | |
1193 | ||
1bda8b3c MA |
1194 | static void migrate_params_test_apply(MigrateSetParameters *params, |
1195 | MigrationParameters *dest) | |
1196 | { | |
1197 | *dest = migrate_get_current()->parameters; | |
1198 | ||
1199 | /* TODO use QAPI_CLONE() instead of duplicating it inline */ | |
1200 | ||
1201 | if (params->has_compress_level) { | |
1202 | dest->compress_level = params->compress_level; | |
1203 | } | |
1204 | ||
1205 | if (params->has_compress_threads) { | |
1206 | dest->compress_threads = params->compress_threads; | |
1207 | } | |
1208 | ||
1d58872a XG |
1209 | if (params->has_compress_wait_thread) { |
1210 | dest->compress_wait_thread = params->compress_wait_thread; | |
1211 | } | |
1212 | ||
1bda8b3c MA |
1213 | if (params->has_decompress_threads) { |
1214 | dest->decompress_threads = params->decompress_threads; | |
1215 | } | |
1216 | ||
1217 | if (params->has_cpu_throttle_initial) { | |
1218 | dest->cpu_throttle_initial = params->cpu_throttle_initial; | |
1219 | } | |
1220 | ||
1221 | if (params->has_cpu_throttle_increment) { | |
1222 | dest->cpu_throttle_increment = params->cpu_throttle_increment; | |
1223 | } | |
1224 | ||
1225 | if (params->has_tls_creds) { | |
01fa5598 MA |
1226 | assert(params->tls_creds->type == QTYPE_QSTRING); |
1227 | dest->tls_creds = g_strdup(params->tls_creds->u.s); | |
1bda8b3c MA |
1228 | } |
1229 | ||
1230 | if (params->has_tls_hostname) { | |
01fa5598 MA |
1231 | assert(params->tls_hostname->type == QTYPE_QSTRING); |
1232 | dest->tls_hostname = g_strdup(params->tls_hostname->u.s); | |
1bda8b3c MA |
1233 | } |
1234 | ||
1235 | if (params->has_max_bandwidth) { | |
1236 | dest->max_bandwidth = params->max_bandwidth; | |
1237 | } | |
1238 | ||
1239 | if (params->has_downtime_limit) { | |
1240 | dest->downtime_limit = params->downtime_limit; | |
1241 | } | |
1242 | ||
1243 | if (params->has_x_checkpoint_delay) { | |
1244 | dest->x_checkpoint_delay = params->x_checkpoint_delay; | |
1245 | } | |
1246 | ||
1247 | if (params->has_block_incremental) { | |
1248 | dest->block_incremental = params->block_incremental; | |
1249 | } | |
5e7577a1 JQ |
1250 | if (params->has_x_multifd_channels) { |
1251 | dest->x_multifd_channels = params->x_multifd_channels; | |
1252 | } | |
1253 | if (params->has_x_multifd_page_count) { | |
1254 | dest->x_multifd_page_count = params->x_multifd_page_count; | |
1255 | } | |
73af8dd8 JQ |
1256 | if (params->has_xbzrle_cache_size) { |
1257 | dest->xbzrle_cache_size = params->xbzrle_cache_size; | |
1258 | } | |
7e555c6c DDAG |
1259 | if (params->has_max_postcopy_bandwidth) { |
1260 | dest->max_postcopy_bandwidth = params->max_postcopy_bandwidth; | |
1261 | } | |
4cbc9c7f LQ |
1262 | if (params->has_max_cpu_throttle) { |
1263 | dest->max_cpu_throttle = params->max_cpu_throttle; | |
1264 | } | |
ee3d96ba DDAG |
1265 | if (params->has_announce_initial) { |
1266 | dest->announce_initial = params->announce_initial; | |
1267 | } | |
1268 | if (params->has_announce_max) { | |
1269 | dest->announce_max = params->announce_max; | |
1270 | } | |
1271 | if (params->has_announce_rounds) { | |
1272 | dest->announce_rounds = params->announce_rounds; | |
1273 | } | |
1274 | if (params->has_announce_step) { | |
1275 | dest->announce_step = params->announce_step; | |
1276 | } | |
1bda8b3c MA |
1277 | } |
1278 | ||
73af8dd8 | 1279 | static void migrate_params_apply(MigrateSetParameters *params, Error **errp) |
16d063bc PX |
1280 | { |
1281 | MigrationState *s = migrate_get_current(); | |
1282 | ||
e87fae4c MA |
1283 | /* TODO use QAPI_CLONE() instead of duplicating it inline */ |
1284 | ||
7f375e04 EB |
1285 | if (params->has_compress_level) { |
1286 | s->parameters.compress_level = params->compress_level; | |
85de8323 | 1287 | } |
476c72aa | 1288 | |
7f375e04 EB |
1289 | if (params->has_compress_threads) { |
1290 | s->parameters.compress_threads = params->compress_threads; | |
85de8323 | 1291 | } |
476c72aa | 1292 | |
1d58872a XG |
1293 | if (params->has_compress_wait_thread) { |
1294 | s->parameters.compress_wait_thread = params->compress_wait_thread; | |
1295 | } | |
1296 | ||
7f375e04 EB |
1297 | if (params->has_decompress_threads) { |
1298 | s->parameters.decompress_threads = params->decompress_threads; | |
85de8323 | 1299 | } |
476c72aa | 1300 | |
7f375e04 EB |
1301 | if (params->has_cpu_throttle_initial) { |
1302 | s->parameters.cpu_throttle_initial = params->cpu_throttle_initial; | |
1626fee3 | 1303 | } |
476c72aa | 1304 | |
7f375e04 EB |
1305 | if (params->has_cpu_throttle_increment) { |
1306 | s->parameters.cpu_throttle_increment = params->cpu_throttle_increment; | |
1626fee3 | 1307 | } |
476c72aa | 1308 | |
7f375e04 | 1309 | if (params->has_tls_creds) { |
69ef1f36 | 1310 | g_free(s->parameters.tls_creds); |
01fa5598 MA |
1311 | assert(params->tls_creds->type == QTYPE_QSTRING); |
1312 | s->parameters.tls_creds = g_strdup(params->tls_creds->u.s); | |
69ef1f36 | 1313 | } |
476c72aa | 1314 | |
7f375e04 | 1315 | if (params->has_tls_hostname) { |
69ef1f36 | 1316 | g_free(s->parameters.tls_hostname); |
01fa5598 MA |
1317 | assert(params->tls_hostname->type == QTYPE_QSTRING); |
1318 | s->parameters.tls_hostname = g_strdup(params->tls_hostname->u.s); | |
69ef1f36 | 1319 | } |
476c72aa | 1320 | |
2ff30257 AA |
1321 | if (params->has_max_bandwidth) { |
1322 | s->parameters.max_bandwidth = params->max_bandwidth; | |
1323 | if (s->to_dst_file) { | |
1324 | qemu_file_set_rate_limit(s->to_dst_file, | |
1325 | s->parameters.max_bandwidth / XFER_LIMIT_RATIO); | |
1326 | } | |
1327 | } | |
476c72aa | 1328 | |
2ff30257 AA |
1329 | if (params->has_downtime_limit) { |
1330 | s->parameters.downtime_limit = params->downtime_limit; | |
1331 | } | |
68b53591 HZ |
1332 | |
1333 | if (params->has_x_checkpoint_delay) { | |
1334 | s->parameters.x_checkpoint_delay = params->x_checkpoint_delay; | |
479125d5 HZ |
1335 | if (migration_in_colo_state()) { |
1336 | colo_checkpoint_notify(s); | |
1337 | } | |
68b53591 | 1338 | } |
476c72aa | 1339 | |
2833c59b JQ |
1340 | if (params->has_block_incremental) { |
1341 | s->parameters.block_incremental = params->block_incremental; | |
1342 | } | |
4075fb1c JQ |
1343 | if (params->has_x_multifd_channels) { |
1344 | s->parameters.x_multifd_channels = params->x_multifd_channels; | |
1345 | } | |
0fb86605 JQ |
1346 | if (params->has_x_multifd_page_count) { |
1347 | s->parameters.x_multifd_page_count = params->x_multifd_page_count; | |
1348 | } | |
73af8dd8 JQ |
1349 | if (params->has_xbzrle_cache_size) { |
1350 | s->parameters.xbzrle_cache_size = params->xbzrle_cache_size; | |
1351 | xbzrle_cache_resize(params->xbzrle_cache_size, errp); | |
1352 | } | |
7e555c6c DDAG |
1353 | if (params->has_max_postcopy_bandwidth) { |
1354 | s->parameters.max_postcopy_bandwidth = params->max_postcopy_bandwidth; | |
1355 | } | |
4cbc9c7f LQ |
1356 | if (params->has_max_cpu_throttle) { |
1357 | s->parameters.max_cpu_throttle = params->max_cpu_throttle; | |
1358 | } | |
ee3d96ba DDAG |
1359 | if (params->has_announce_initial) { |
1360 | s->parameters.announce_initial = params->announce_initial; | |
1361 | } | |
1362 | if (params->has_announce_max) { | |
1363 | s->parameters.announce_max = params->announce_max; | |
1364 | } | |
1365 | if (params->has_announce_rounds) { | |
1366 | s->parameters.announce_rounds = params->announce_rounds; | |
1367 | } | |
1368 | if (params->has_announce_step) { | |
1369 | s->parameters.announce_step = params->announce_step; | |
1370 | } | |
85de8323 LL |
1371 | } |
1372 | ||
1bda8b3c | 1373 | void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp) |
476c72aa | 1374 | { |
1bda8b3c MA |
1375 | MigrationParameters tmp; |
1376 | ||
01fa5598 MA |
1377 | /* TODO Rewrite "" to null instead */ |
1378 | if (params->has_tls_creds | |
1379 | && params->tls_creds->type == QTYPE_QNULL) { | |
cb3e7f08 | 1380 | qobject_unref(params->tls_creds->u.n); |
01fa5598 MA |
1381 | params->tls_creds->type = QTYPE_QSTRING; |
1382 | params->tls_creds->u.s = strdup(""); | |
1383 | } | |
1384 | /* TODO Rewrite "" to null instead */ | |
1385 | if (params->has_tls_hostname | |
1386 | && params->tls_hostname->type == QTYPE_QNULL) { | |
cb3e7f08 | 1387 | qobject_unref(params->tls_hostname->u.n); |
01fa5598 MA |
1388 | params->tls_hostname->type = QTYPE_QSTRING; |
1389 | params->tls_hostname->u.s = strdup(""); | |
1390 | } | |
1391 | ||
1bda8b3c MA |
1392 | migrate_params_test_apply(params, &tmp); |
1393 | ||
1394 | if (!migrate_params_check(&tmp, errp)) { | |
476c72aa PX |
1395 | /* Invalid parameter */ |
1396 | return; | |
1397 | } | |
1398 | ||
73af8dd8 | 1399 | migrate_params_apply(params, errp); |
476c72aa PX |
1400 | } |
1401 | ||
2594f56d | 1402 | |
4886a1bc DDAG |
1403 | void qmp_migrate_start_postcopy(Error **errp) |
1404 | { | |
1405 | MigrationState *s = migrate_get_current(); | |
1406 | ||
16b0fd32 | 1407 | if (!migrate_postcopy()) { |
a54d340b | 1408 | error_setg(errp, "Enable postcopy with migrate_set_capability before" |
4886a1bc DDAG |
1409 | " the start of migration"); |
1410 | return; | |
1411 | } | |
1412 | ||
1413 | if (s->state == MIGRATION_STATUS_NONE) { | |
1414 | error_setg(errp, "Postcopy must be started after migration has been" | |
1415 | " started"); | |
1416 | return; | |
1417 | } | |
1418 | /* | |
1419 | * we don't error if migration has finished since that would be racy | |
1420 | * with issuing this command. | |
1421 | */ | |
1422 | atomic_set(&s->start_postcopy, true); | |
1423 | } | |
1424 | ||
065e2813 AL |
1425 | /* shared migration helpers */ |
1426 | ||
48781e5b | 1427 | void migrate_set_state(int *state, int old_state, int new_state) |
51cf4c1a | 1428 | { |
a31fedee | 1429 | assert(new_state < MIGRATION_STATUS__MAX); |
48781e5b | 1430 | if (atomic_cmpxchg(state, old_state, new_state) == old_state) { |
a31fedee | 1431 | trace_migrate_set_state(MigrationStatus_str(new_state)); |
b05dc723 | 1432 | migrate_generate_event(new_state); |
51cf4c1a Z |
1433 | } |
1434 | } | |
1435 | ||
4e4a3d3a PX |
1436 | static MigrationCapabilityStatusList *migrate_cap_add( |
1437 | MigrationCapabilityStatusList *list, | |
1438 | MigrationCapability index, | |
1439 | bool state) | |
2833c59b JQ |
1440 | { |
1441 | MigrationCapabilityStatusList *cap; | |
1442 | ||
1443 | cap = g_new0(MigrationCapabilityStatusList, 1); | |
1444 | cap->value = g_new0(MigrationCapabilityStatus, 1); | |
4e4a3d3a PX |
1445 | cap->value->capability = index; |
1446 | cap->value->state = state; | |
1447 | cap->next = list; | |
1448 | ||
1449 | return cap; | |
1450 | } | |
1451 | ||
1452 | void migrate_set_block_enabled(bool value, Error **errp) | |
1453 | { | |
1454 | MigrationCapabilityStatusList *cap; | |
1455 | ||
1456 | cap = migrate_cap_add(NULL, MIGRATION_CAPABILITY_BLOCK, value); | |
2833c59b JQ |
1457 | qmp_migrate_set_capabilities(cap, errp); |
1458 | qapi_free_MigrationCapabilityStatusList(cap); | |
1459 | } | |
1460 | ||
1461 | static void migrate_set_block_incremental(MigrationState *s, bool value) | |
1462 | { | |
1463 | s->parameters.block_incremental = value; | |
1464 | } | |
1465 | ||
1466 | static void block_cleanup_parameters(MigrationState *s) | |
1467 | { | |
1468 | if (s->must_remove_block_options) { | |
1469 | /* setting to false can never fail */ | |
1470 | migrate_set_block_enabled(false, &error_abort); | |
1471 | migrate_set_block_incremental(s, false); | |
1472 | s->must_remove_block_options = false; | |
1473 | } | |
1474 | } | |
1475 | ||
bb1fadc4 | 1476 | static void migrate_fd_cleanup(void *opaque) |
065e2813 | 1477 | { |
bb1fadc4 PB |
1478 | MigrationState *s = opaque; |
1479 | ||
1480 | qemu_bh_delete(s->cleanup_bh); | |
1481 | s->cleanup_bh = NULL; | |
1482 | ||
0ceccd85 PX |
1483 | qemu_savevm_state_cleanup(); |
1484 | ||
89a02a9f | 1485 | if (s->to_dst_file) { |
62df066f | 1486 | QEMUFile *tmp; |
f986c3d2 | 1487 | |
9013dca5 | 1488 | trace_migrate_fd_cleanup(); |
404a7c05 | 1489 | qemu_mutex_unlock_iothread(); |
1d34e4bf DDAG |
1490 | if (s->migration_thread_running) { |
1491 | qemu_thread_join(&s->thread); | |
1492 | s->migration_thread_running = false; | |
1493 | } | |
404a7c05 PB |
1494 | qemu_mutex_lock_iothread(); |
1495 | ||
1398b2e3 | 1496 | multifd_save_cleanup(); |
62df066f PX |
1497 | qemu_mutex_lock(&s->qemu_file_lock); |
1498 | tmp = s->to_dst_file; | |
89a02a9f | 1499 | s->to_dst_file = NULL; |
62df066f PX |
1500 | qemu_mutex_unlock(&s->qemu_file_lock); |
1501 | /* | |
1502 | * Close the file handle without the lock to make sure the | |
1503 | * critical section won't block for long. | |
1504 | */ | |
1505 | qemu_fclose(tmp); | |
065e2813 AL |
1506 | } |
1507 | ||
9ec055ae DDAG |
1508 | assert((s->state != MIGRATION_STATUS_ACTIVE) && |
1509 | (s->state != MIGRATION_STATUS_POSTCOPY_ACTIVE)); | |
7a2c1721 | 1510 | |
94f5a437 | 1511 | if (s->state == MIGRATION_STATUS_CANCELLING) { |
48781e5b | 1512 | migrate_set_state(&s->state, MIGRATION_STATUS_CANCELLING, |
94f5a437 | 1513 | MIGRATION_STATUS_CANCELLED); |
7a2c1721 | 1514 | } |
a3fa1d78 | 1515 | |
87db1a7d JQ |
1516 | if (s->error) { |
1517 | /* It is used on info migrate. We can't free it */ | |
1518 | error_report_err(error_copy(s->error)); | |
1519 | } | |
a3fa1d78 | 1520 | notifier_list_notify(&migration_state_notifiers, s); |
2833c59b | 1521 | block_cleanup_parameters(s); |
065e2813 AL |
1522 | } |
1523 | ||
87db1a7d JQ |
1524 | void migrate_set_error(MigrationState *s, const Error *error) |
1525 | { | |
1526 | qemu_mutex_lock(&s->error_mutex); | |
1527 | if (!s->error) { | |
1528 | s->error = error_copy(error); | |
1529 | } | |
1530 | qemu_mutex_unlock(&s->error_mutex); | |
1531 | } | |
1532 | ||
d59ce6f3 | 1533 | void migrate_fd_error(MigrationState *s, const Error *error) |
065e2813 | 1534 | { |
25174055 | 1535 | trace_migrate_fd_error(error_get_pretty(error)); |
89a02a9f | 1536 | assert(s->to_dst_file == NULL); |
48781e5b HZ |
1537 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
1538 | MIGRATION_STATUS_FAILED); | |
87db1a7d | 1539 | migrate_set_error(s, error); |
458cf28e JQ |
1540 | } |
1541 | ||
0edda1c4 | 1542 | static void migrate_fd_cancel(MigrationState *s) |
065e2813 | 1543 | { |
6f2b811a | 1544 | int old_state ; |
89a02a9f | 1545 | QEMUFile *f = migrate_get_current()->to_dst_file; |
9013dca5 | 1546 | trace_migrate_fd_cancel(); |
065e2813 | 1547 | |
70b20477 DDAG |
1548 | if (s->rp_state.from_dst_file) { |
1549 | /* shutdown the rp socket, so causing the rp thread to shutdown */ | |
1550 | qemu_file_shutdown(s->rp_state.from_dst_file); | |
1551 | } | |
1552 | ||
6f2b811a Z |
1553 | do { |
1554 | old_state = s->state; | |
f6844b99 | 1555 | if (!migration_is_setup_or_active(old_state)) { |
6f2b811a Z |
1556 | break; |
1557 | } | |
a7b36b48 DDAG |
1558 | /* If the migration is paused, kick it out of the pause */ |
1559 | if (old_state == MIGRATION_STATUS_PRE_SWITCHOVER) { | |
1560 | qemu_sem_post(&s->pause_sem); | |
1561 | } | |
48781e5b | 1562 | migrate_set_state(&s->state, old_state, MIGRATION_STATUS_CANCELLING); |
31194731 | 1563 | } while (s->state != MIGRATION_STATUS_CANCELLING); |
a26ba26e DDAG |
1564 | |
1565 | /* | |
1566 | * If we're unlucky the migration code might be stuck somewhere in a | |
1567 | * send/write while the network has failed and is waiting to timeout; | |
1568 | * if we've got shutdown(2) available then we can force it to quit. | |
1569 | * The outgoing qemu file gets closed in migrate_fd_cleanup that is | |
1570 | * called in a bh, so there is no race against this cancel. | |
1571 | */ | |
31194731 | 1572 | if (s->state == MIGRATION_STATUS_CANCELLING && f) { |
a26ba26e DDAG |
1573 | qemu_file_shutdown(f); |
1574 | } | |
1d2acc31 HZ |
1575 | if (s->state == MIGRATION_STATUS_CANCELLING && s->block_inactive) { |
1576 | Error *local_err = NULL; | |
1577 | ||
1578 | bdrv_invalidate_cache_all(&local_err); | |
1579 | if (local_err) { | |
1580 | error_report_err(local_err); | |
1581 | } else { | |
1582 | s->block_inactive = false; | |
1583 | } | |
1584 | } | |
065e2813 AL |
1585 | } |
1586 | ||
99a0db9b GH |
1587 | void add_migration_state_change_notifier(Notifier *notify) |
1588 | { | |
1589 | notifier_list_add(&migration_state_notifiers, notify); | |
1590 | } | |
1591 | ||
1592 | void remove_migration_state_change_notifier(Notifier *notify) | |
1593 | { | |
31552529 | 1594 | notifier_remove(notify); |
99a0db9b GH |
1595 | } |
1596 | ||
02edd2e7 | 1597 | bool migration_in_setup(MigrationState *s) |
afe2df69 | 1598 | { |
31194731 | 1599 | return s->state == MIGRATION_STATUS_SETUP; |
afe2df69 GH |
1600 | } |
1601 | ||
7073693b | 1602 | bool migration_has_finished(MigrationState *s) |
99a0db9b | 1603 | { |
31194731 | 1604 | return s->state == MIGRATION_STATUS_COMPLETED; |
99a0db9b | 1605 | } |
0edda1c4 | 1606 | |
afe2df69 GH |
1607 | bool migration_has_failed(MigrationState *s) |
1608 | { | |
31194731 HZ |
1609 | return (s->state == MIGRATION_STATUS_CANCELLED || |
1610 | s->state == MIGRATION_STATUS_FAILED); | |
afe2df69 GH |
1611 | } |
1612 | ||
5727309d | 1613 | bool migration_in_postcopy(void) |
9ec055ae | 1614 | { |
5727309d JQ |
1615 | MigrationState *s = migrate_get_current(); |
1616 | ||
9ec055ae DDAG |
1617 | return (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE); |
1618 | } | |
1619 | ||
b82fc321 DDAG |
1620 | bool migration_in_postcopy_after_devices(MigrationState *s) |
1621 | { | |
5727309d | 1622 | return migration_in_postcopy() && s->postcopy_after_devices; |
b82fc321 DDAG |
1623 | } |
1624 | ||
fab35005 | 1625 | bool migration_is_idle(void) |
fe44dc91 | 1626 | { |
fab35005 | 1627 | MigrationState *s = migrate_get_current(); |
fe44dc91 AA |
1628 | |
1629 | switch (s->state) { | |
1630 | case MIGRATION_STATUS_NONE: | |
1631 | case MIGRATION_STATUS_CANCELLED: | |
1632 | case MIGRATION_STATUS_COMPLETED: | |
1633 | case MIGRATION_STATUS_FAILED: | |
1634 | return true; | |
1635 | case MIGRATION_STATUS_SETUP: | |
1636 | case MIGRATION_STATUS_CANCELLING: | |
1637 | case MIGRATION_STATUS_ACTIVE: | |
1638 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: | |
1639 | case MIGRATION_STATUS_COLO: | |
31e06077 DDAG |
1640 | case MIGRATION_STATUS_PRE_SWITCHOVER: |
1641 | case MIGRATION_STATUS_DEVICE: | |
fe44dc91 AA |
1642 | return false; |
1643 | case MIGRATION_STATUS__MAX: | |
1644 | g_assert_not_reached(); | |
1645 | } | |
1646 | ||
1647 | return false; | |
1648 | } | |
1649 | ||
3e0c8050 | 1650 | void migrate_init(MigrationState *s) |
0edda1c4 | 1651 | { |
389775d1 DDAG |
1652 | /* |
1653 | * Reinitialise all migration state, except | |
1654 | * parameters/capabilities that the user set, and | |
1655 | * locks. | |
1656 | */ | |
1657 | s->bytes_xfer = 0; | |
1658 | s->xfer_limit = 0; | |
1659 | s->cleanup_bh = 0; | |
89a02a9f | 1660 | s->to_dst_file = NULL; |
389775d1 | 1661 | s->state = MIGRATION_STATUS_NONE; |
389775d1 DDAG |
1662 | s->rp_state.from_dst_file = NULL; |
1663 | s->rp_state.error = false; | |
1664 | s->mbps = 0.0; | |
aecbfe9c | 1665 | s->pages_per_second = 0.0; |
389775d1 DDAG |
1666 | s->downtime = 0; |
1667 | s->expected_downtime = 0; | |
389775d1 | 1668 | s->setup_time = 0; |
389775d1 | 1669 | s->start_postcopy = false; |
b82fc321 | 1670 | s->postcopy_after_devices = false; |
389775d1 | 1671 | s->migration_thread_running = false; |
d59ce6f3 DB |
1672 | error_free(s->error); |
1673 | s->error = NULL; | |
389775d1 | 1674 | |
48781e5b | 1675 | migrate_set_state(&s->state, MIGRATION_STATUS_NONE, MIGRATION_STATUS_SETUP); |
0edda1c4 | 1676 | |
4af246a3 PX |
1677 | s->start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
1678 | s->total_time = 0; | |
7287cbd4 | 1679 | s->vm_was_running = false; |
b15df1ae PX |
1680 | s->iteration_initial_bytes = 0; |
1681 | s->threshold_size = 0; | |
0edda1c4 | 1682 | } |
cab30143 | 1683 | |
fa2756b7 AL |
1684 | static GSList *migration_blockers; |
1685 | ||
fe44dc91 | 1686 | int migrate_add_blocker(Error *reason, Error **errp) |
fa2756b7 | 1687 | { |
3df663e5 | 1688 | if (migrate_get_current()->only_migratable) { |
4b576648 MA |
1689 | error_propagate_prepend(errp, error_copy(reason), |
1690 | "disallowing migration blocker " | |
1691 | "(--only_migratable) for: "); | |
b67b8c3a AA |
1692 | return -EACCES; |
1693 | } | |
1694 | ||
fab35005 | 1695 | if (migration_is_idle()) { |
fe44dc91 AA |
1696 | migration_blockers = g_slist_prepend(migration_blockers, reason); |
1697 | return 0; | |
1698 | } | |
1699 | ||
4b576648 MA |
1700 | error_propagate_prepend(errp, error_copy(reason), |
1701 | "disallowing migration blocker " | |
1702 | "(migration in progress) for: "); | |
fe44dc91 | 1703 | return -EBUSY; |
fa2756b7 AL |
1704 | } |
1705 | ||
1706 | void migrate_del_blocker(Error *reason) | |
1707 | { | |
1708 | migration_blockers = g_slist_remove(migration_blockers, reason); | |
1709 | } | |
1710 | ||
bf1ae1f4 DDAG |
1711 | void qmp_migrate_incoming(const char *uri, Error **errp) |
1712 | { | |
1713 | Error *local_err = NULL; | |
4debb5f5 | 1714 | static bool once = true; |
bf1ae1f4 DDAG |
1715 | |
1716 | if (!deferred_incoming) { | |
4debb5f5 | 1717 | error_setg(errp, "For use with '-incoming defer'"); |
bf1ae1f4 DDAG |
1718 | return; |
1719 | } | |
4debb5f5 DDAG |
1720 | if (!once) { |
1721 | error_setg(errp, "The incoming migration has already been started"); | |
1722 | } | |
bf1ae1f4 DDAG |
1723 | |
1724 | qemu_start_incoming_migration(uri, &local_err); | |
1725 | ||
1726 | if (local_err) { | |
1727 | error_propagate(errp, local_err); | |
1728 | return; | |
1729 | } | |
1730 | ||
4debb5f5 | 1731 | once = false; |
bf1ae1f4 DDAG |
1732 | } |
1733 | ||
02affd41 PX |
1734 | void qmp_migrate_recover(const char *uri, Error **errp) |
1735 | { | |
1736 | MigrationIncomingState *mis = migration_incoming_get_current(); | |
1737 | ||
1738 | if (mis->state != MIGRATION_STATUS_POSTCOPY_PAUSED) { | |
1739 | error_setg(errp, "Migrate recover can only be run " | |
1740 | "when postcopy is paused."); | |
1741 | return; | |
1742 | } | |
1743 | ||
1744 | if (atomic_cmpxchg(&mis->postcopy_recover_triggered, | |
1745 | false, true) == true) { | |
1746 | error_setg(errp, "Migrate recovery is triggered already"); | |
1747 | return; | |
1748 | } | |
1749 | ||
1750 | /* | |
1751 | * Note that this call will never start a real migration; it will | |
1752 | * only re-setup the migration stream and poke existing migration | |
1753 | * to continue using that newly established channel. | |
1754 | */ | |
1755 | qemu_start_incoming_migration(uri, errp); | |
1756 | } | |
1757 | ||
bfbf89c2 PX |
1758 | void qmp_migrate_pause(Error **errp) |
1759 | { | |
1760 | MigrationState *ms = migrate_get_current(); | |
1761 | MigrationIncomingState *mis = migration_incoming_get_current(); | |
1762 | int ret; | |
1763 | ||
1764 | if (ms->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { | |
1765 | /* Source side, during postcopy */ | |
1766 | qemu_mutex_lock(&ms->qemu_file_lock); | |
1767 | ret = qemu_file_shutdown(ms->to_dst_file); | |
1768 | qemu_mutex_unlock(&ms->qemu_file_lock); | |
1769 | if (ret) { | |
1770 | error_setg(errp, "Failed to pause source migration"); | |
1771 | } | |
1772 | return; | |
1773 | } | |
1774 | ||
1775 | if (mis->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { | |
1776 | ret = qemu_file_shutdown(mis->from_src_file); | |
1777 | if (ret) { | |
1778 | error_setg(errp, "Failed to pause destination migration"); | |
1779 | } | |
1780 | return; | |
1781 | } | |
1782 | ||
1783 | error_setg(errp, "migrate-pause is currently only supported " | |
1784 | "during postcopy-active state"); | |
1785 | } | |
1786 | ||
24f3902b GK |
1787 | bool migration_is_blocked(Error **errp) |
1788 | { | |
1789 | if (qemu_savevm_state_blocked(errp)) { | |
1790 | return true; | |
1791 | } | |
1792 | ||
1793 | if (migration_blockers) { | |
250561e1 | 1794 | error_propagate(errp, error_copy(migration_blockers->data)); |
24f3902b GK |
1795 | return true; |
1796 | } | |
1797 | ||
1798 | return false; | |
1799 | } | |
1800 | ||
d3e35b8f PX |
1801 | /* Returns true if continue to migrate, or false if error detected */ |
1802 | static bool migrate_prepare(MigrationState *s, bool blk, bool blk_inc, | |
1803 | bool resume, Error **errp) | |
cab30143 | 1804 | { |
be7059cd | 1805 | Error *local_err = NULL; |
d3e35b8f PX |
1806 | |
1807 | if (resume) { | |
1808 | if (s->state != MIGRATION_STATUS_POSTCOPY_PAUSED) { | |
1809 | error_setg(errp, "Cannot resume if there is no " | |
1810 | "paused migration"); | |
1811 | return false; | |
1812 | } | |
97ca211c PX |
1813 | |
1814 | /* | |
1815 | * Postcopy recovery won't work well with release-ram | |
1816 | * capability since release-ram will drop the page buffer as | |
1817 | * long as the page is put into the send buffer. So if there | |
1818 | * is a network failure happened, any page buffers that have | |
1819 | * not yet reached the destination VM but have already been | |
1820 | * sent from the source VM will be lost forever. Let's refuse | |
1821 | * the client from resuming such a postcopy migration. | |
1822 | * Luckily release-ram was designed to only be used when src | |
1823 | * and destination VMs are on the same host, so it should be | |
1824 | * fine. | |
1825 | */ | |
1826 | if (migrate_release_ram()) { | |
1827 | error_setg(errp, "Postcopy recovery cannot work " | |
1828 | "when release-ram capability is set"); | |
1829 | return false; | |
1830 | } | |
1831 | ||
d3e35b8f PX |
1832 | /* This is a resume, skip init status */ |
1833 | return true; | |
1834 | } | |
cab30143 | 1835 | |
f6844b99 | 1836 | if (migration_is_setup_or_active(s->state) || |
0b827d5e HZ |
1837 | s->state == MIGRATION_STATUS_CANCELLING || |
1838 | s->state == MIGRATION_STATUS_COLO) { | |
c6bd8c70 | 1839 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
d3e35b8f | 1840 | return false; |
cab30143 | 1841 | } |
d3e35b8f | 1842 | |
ca99993a DDAG |
1843 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
1844 | error_setg(errp, "Guest is waiting for an incoming migration"); | |
d3e35b8f | 1845 | return false; |
ca99993a DDAG |
1846 | } |
1847 | ||
24f3902b | 1848 | if (migration_is_blocked(errp)) { |
d3e35b8f | 1849 | return false; |
fa2756b7 AL |
1850 | } |
1851 | ||
d3e35b8f | 1852 | if (blk || blk_inc) { |
2833c59b JQ |
1853 | if (migrate_use_block() || migrate_use_block_incremental()) { |
1854 | error_setg(errp, "Command options are incompatible with " | |
1855 | "current migration capabilities"); | |
d3e35b8f | 1856 | return false; |
2833c59b JQ |
1857 | } |
1858 | migrate_set_block_enabled(true, &local_err); | |
1859 | if (local_err) { | |
1860 | error_propagate(errp, local_err); | |
d3e35b8f | 1861 | return false; |
2833c59b JQ |
1862 | } |
1863 | s->must_remove_block_options = true; | |
1864 | } | |
1865 | ||
d3e35b8f | 1866 | if (blk_inc) { |
2833c59b JQ |
1867 | migrate_set_block_incremental(s, true); |
1868 | } | |
1869 | ||
3e0c8050 | 1870 | migrate_init(s); |
cab30143 | 1871 | |
d3e35b8f PX |
1872 | return true; |
1873 | } | |
1874 | ||
1875 | void qmp_migrate(const char *uri, bool has_blk, bool blk, | |
1876 | bool has_inc, bool inc, bool has_detach, bool detach, | |
1877 | bool has_resume, bool resume, Error **errp) | |
1878 | { | |
1879 | Error *local_err = NULL; | |
1880 | MigrationState *s = migrate_get_current(); | |
1881 | const char *p; | |
1882 | ||
1883 | if (!migrate_prepare(s, has_blk && blk, has_inc && inc, | |
1884 | has_resume && resume, errp)) { | |
1885 | /* Error detected, put into errp */ | |
1886 | return; | |
1887 | } | |
1888 | ||
cab30143 | 1889 | if (strstart(uri, "tcp:", &p)) { |
f37afb5a | 1890 | tcp_start_outgoing_migration(s, p, &local_err); |
2da776db | 1891 | #ifdef CONFIG_RDMA |
41310c68 | 1892 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
1893 | rdma_start_outgoing_migration(s, p, &local_err); |
1894 | #endif | |
cab30143 | 1895 | } else if (strstart(uri, "exec:", &p)) { |
f37afb5a | 1896 | exec_start_outgoing_migration(s, p, &local_err); |
cab30143 | 1897 | } else if (strstart(uri, "unix:", &p)) { |
f37afb5a | 1898 | unix_start_outgoing_migration(s, p, &local_err); |
cab30143 | 1899 | } else if (strstart(uri, "fd:", &p)) { |
f37afb5a | 1900 | fd_start_outgoing_migration(s, p, &local_err); |
99a0db9b | 1901 | } else { |
c6bd8c70 MA |
1902 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "uri", |
1903 | "a valid migration protocol"); | |
48781e5b HZ |
1904 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
1905 | MIGRATION_STATUS_FAILED); | |
09576e74 | 1906 | block_cleanup_parameters(s); |
e1c37d0e | 1907 | return; |
cab30143 JQ |
1908 | } |
1909 | ||
f37afb5a | 1910 | if (local_err) { |
d59ce6f3 | 1911 | migrate_fd_error(s, local_err); |
f37afb5a | 1912 | error_propagate(errp, local_err); |
e1c37d0e | 1913 | return; |
1299c631 | 1914 | } |
cab30143 JQ |
1915 | } |
1916 | ||
6cdedb07 | 1917 | void qmp_migrate_cancel(Error **errp) |
cab30143 | 1918 | { |
17549e84 | 1919 | migrate_fd_cancel(migrate_get_current()); |
cab30143 JQ |
1920 | } |
1921 | ||
89cfc02c DDAG |
1922 | void qmp_migrate_continue(MigrationStatus state, Error **errp) |
1923 | { | |
1924 | MigrationState *s = migrate_get_current(); | |
1925 | if (s->state != state) { | |
1926 | error_setg(errp, "Migration not in expected state: %s", | |
1927 | MigrationStatus_str(s->state)); | |
1928 | return; | |
1929 | } | |
1930 | qemu_sem_post(&s->pause_sem); | |
1931 | } | |
1932 | ||
9e1ba4cc OW |
1933 | void qmp_migrate_set_cache_size(int64_t value, Error **errp) |
1934 | { | |
73af8dd8 JQ |
1935 | MigrateSetParameters p = { |
1936 | .has_xbzrle_cache_size = true, | |
1937 | .xbzrle_cache_size = value, | |
1938 | }; | |
c91e681a | 1939 | |
73af8dd8 | 1940 | qmp_migrate_set_parameters(&p, errp); |
9e1ba4cc OW |
1941 | } |
1942 | ||
1943 | int64_t qmp_query_migrate_cache_size(Error **errp) | |
1944 | { | |
1945 | return migrate_xbzrle_cache_size(); | |
1946 | } | |
1947 | ||
3dc85383 | 1948 | void qmp_migrate_set_speed(int64_t value, Error **errp) |
cab30143 | 1949 | { |
1bda8b3c | 1950 | MigrateSetParameters p = { |
2ff30257 AA |
1951 | .has_max_bandwidth = true, |
1952 | .max_bandwidth = value, | |
1953 | }; | |
cab30143 | 1954 | |
2ff30257 | 1955 | qmp_migrate_set_parameters(&p, errp); |
cab30143 JQ |
1956 | } |
1957 | ||
4f0a993b | 1958 | void qmp_migrate_set_downtime(double value, Error **errp) |
cab30143 | 1959 | { |
87c9cc1c DHB |
1960 | if (value < 0 || value > MAX_MIGRATE_DOWNTIME_SECONDS) { |
1961 | error_setg(errp, "Parameter 'downtime_limit' expects an integer in " | |
1962 | "the range of 0 to %d seconds", | |
1963 | MAX_MIGRATE_DOWNTIME_SECONDS); | |
1964 | return; | |
1965 | } | |
1966 | ||
2ff30257 AA |
1967 | value *= 1000; /* Convert to milliseconds */ |
1968 | value = MAX(0, MIN(INT64_MAX, value)); | |
1969 | ||
1bda8b3c | 1970 | MigrateSetParameters p = { |
2ff30257 AA |
1971 | .has_downtime_limit = true, |
1972 | .downtime_limit = value, | |
1973 | }; | |
1974 | ||
1975 | qmp_migrate_set_parameters(&p, errp); | |
99a0db9b | 1976 | } |
17ad9b35 | 1977 | |
53f09a10 PB |
1978 | bool migrate_release_ram(void) |
1979 | { | |
1980 | MigrationState *s; | |
1981 | ||
1982 | s = migrate_get_current(); | |
1983 | ||
1984 | return s->enabled_capabilities[MIGRATION_CAPABILITY_RELEASE_RAM]; | |
1985 | } | |
1986 | ||
53dd370c DDAG |
1987 | bool migrate_postcopy_ram(void) |
1988 | { | |
1989 | MigrationState *s; | |
1990 | ||
1991 | s = migrate_get_current(); | |
1992 | ||
32c3db5b | 1993 | return s->enabled_capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM]; |
53dd370c DDAG |
1994 | } |
1995 | ||
58110f0a VSO |
1996 | bool migrate_postcopy(void) |
1997 | { | |
dd6bb914 | 1998 | return migrate_postcopy_ram() || migrate_dirty_bitmaps(); |
58110f0a VSO |
1999 | } |
2000 | ||
bde1e2ec CV |
2001 | bool migrate_auto_converge(void) |
2002 | { | |
2003 | MigrationState *s; | |
2004 | ||
2005 | s = migrate_get_current(); | |
2006 | ||
2007 | return s->enabled_capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; | |
2008 | } | |
2009 | ||
323004a3 PL |
2010 | bool migrate_zero_blocks(void) |
2011 | { | |
2012 | MigrationState *s; | |
2013 | ||
2014 | s = migrate_get_current(); | |
2015 | ||
2016 | return s->enabled_capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS]; | |
2017 | } | |
2018 | ||
f22f928e AP |
2019 | bool migrate_postcopy_blocktime(void) |
2020 | { | |
2021 | MigrationState *s; | |
2022 | ||
2023 | s = migrate_get_current(); | |
2024 | ||
2025 | return s->enabled_capabilities[MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME]; | |
2026 | } | |
2027 | ||
8706d2d5 LL |
2028 | bool migrate_use_compression(void) |
2029 | { | |
dde4e694 LL |
2030 | MigrationState *s; |
2031 | ||
2032 | s = migrate_get_current(); | |
2033 | ||
2034 | return s->enabled_capabilities[MIGRATION_CAPABILITY_COMPRESS]; | |
8706d2d5 LL |
2035 | } |
2036 | ||
2037 | int migrate_compress_level(void) | |
2038 | { | |
2039 | MigrationState *s; | |
2040 | ||
2041 | s = migrate_get_current(); | |
2042 | ||
2594f56d | 2043 | return s->parameters.compress_level; |
8706d2d5 LL |
2044 | } |
2045 | ||
2046 | int migrate_compress_threads(void) | |
2047 | { | |
2048 | MigrationState *s; | |
2049 | ||
2050 | s = migrate_get_current(); | |
2051 | ||
2594f56d | 2052 | return s->parameters.compress_threads; |
8706d2d5 LL |
2053 | } |
2054 | ||
1d58872a XG |
2055 | int migrate_compress_wait_thread(void) |
2056 | { | |
2057 | MigrationState *s; | |
2058 | ||
2059 | s = migrate_get_current(); | |
2060 | ||
2061 | return s->parameters.compress_wait_thread; | |
2062 | } | |
2063 | ||
3fcb38c2 LL |
2064 | int migrate_decompress_threads(void) |
2065 | { | |
2066 | MigrationState *s; | |
2067 | ||
2068 | s = migrate_get_current(); | |
2069 | ||
2594f56d | 2070 | return s->parameters.decompress_threads; |
3fcb38c2 LL |
2071 | } |
2072 | ||
55efc8c2 VSO |
2073 | bool migrate_dirty_bitmaps(void) |
2074 | { | |
2075 | MigrationState *s; | |
2076 | ||
2077 | s = migrate_get_current(); | |
2078 | ||
2079 | return s->enabled_capabilities[MIGRATION_CAPABILITY_DIRTY_BITMAPS]; | |
2080 | } | |
2081 | ||
18269069 YK |
2082 | bool migrate_ignore_shared(void) |
2083 | { | |
2084 | MigrationState *s; | |
2085 | ||
2086 | s = migrate_get_current(); | |
2087 | ||
2088 | return s->enabled_capabilities[MIGRATION_CAPABILITY_X_IGNORE_SHARED]; | |
2089 | } | |
2090 | ||
b05dc723 JQ |
2091 | bool migrate_use_events(void) |
2092 | { | |
2093 | MigrationState *s; | |
2094 | ||
2095 | s = migrate_get_current(); | |
2096 | ||
2097 | return s->enabled_capabilities[MIGRATION_CAPABILITY_EVENTS]; | |
2098 | } | |
2099 | ||
30126bbf JQ |
2100 | bool migrate_use_multifd(void) |
2101 | { | |
2102 | MigrationState *s; | |
2103 | ||
2104 | s = migrate_get_current(); | |
2105 | ||
2106 | return s->enabled_capabilities[MIGRATION_CAPABILITY_X_MULTIFD]; | |
2107 | } | |
2108 | ||
93fbd031 DDAG |
2109 | bool migrate_pause_before_switchover(void) |
2110 | { | |
2111 | MigrationState *s; | |
2112 | ||
2113 | s = migrate_get_current(); | |
2114 | ||
2115 | return s->enabled_capabilities[ | |
2116 | MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER]; | |
2117 | } | |
2118 | ||
4075fb1c JQ |
2119 | int migrate_multifd_channels(void) |
2120 | { | |
2121 | MigrationState *s; | |
2122 | ||
2123 | s = migrate_get_current(); | |
2124 | ||
2125 | return s->parameters.x_multifd_channels; | |
2126 | } | |
2127 | ||
0fb86605 JQ |
2128 | int migrate_multifd_page_count(void) |
2129 | { | |
2130 | MigrationState *s; | |
2131 | ||
2132 | s = migrate_get_current(); | |
2133 | ||
2134 | return s->parameters.x_multifd_page_count; | |
2135 | } | |
2136 | ||
17ad9b35 OW |
2137 | int migrate_use_xbzrle(void) |
2138 | { | |
2139 | MigrationState *s; | |
2140 | ||
2141 | s = migrate_get_current(); | |
2142 | ||
2143 | return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE]; | |
2144 | } | |
2145 | ||
2146 | int64_t migrate_xbzrle_cache_size(void) | |
2147 | { | |
2148 | MigrationState *s; | |
2149 | ||
2150 | s = migrate_get_current(); | |
2151 | ||
73af8dd8 | 2152 | return s->parameters.xbzrle_cache_size; |
17ad9b35 | 2153 | } |
0d82d0e8 | 2154 | |
7e555c6c DDAG |
2155 | static int64_t migrate_max_postcopy_bandwidth(void) |
2156 | { | |
2157 | MigrationState *s; | |
2158 | ||
2159 | s = migrate_get_current(); | |
2160 | ||
2161 | return s->parameters.max_postcopy_bandwidth; | |
2162 | } | |
2163 | ||
2833c59b JQ |
2164 | bool migrate_use_block(void) |
2165 | { | |
2166 | MigrationState *s; | |
2167 | ||
2168 | s = migrate_get_current(); | |
2169 | ||
2170 | return s->enabled_capabilities[MIGRATION_CAPABILITY_BLOCK]; | |
2171 | } | |
2172 | ||
c788ada8 PX |
2173 | bool migrate_use_return_path(void) |
2174 | { | |
2175 | MigrationState *s; | |
2176 | ||
2177 | s = migrate_get_current(); | |
2178 | ||
2179 | return s->enabled_capabilities[MIGRATION_CAPABILITY_RETURN_PATH]; | |
2180 | } | |
2181 | ||
2833c59b JQ |
2182 | bool migrate_use_block_incremental(void) |
2183 | { | |
2184 | MigrationState *s; | |
2185 | ||
2186 | s = migrate_get_current(); | |
2187 | ||
2188 | return s->parameters.block_incremental; | |
2189 | } | |
2190 | ||
70b20477 DDAG |
2191 | /* migration thread support */ |
2192 | /* | |
2193 | * Something bad happened to the RP stream, mark an error | |
2194 | * The caller shall print or trace something to indicate why | |
2195 | */ | |
2196 | static void mark_source_rp_bad(MigrationState *s) | |
2197 | { | |
2198 | s->rp_state.error = true; | |
2199 | } | |
2200 | ||
2201 | static struct rp_cmd_args { | |
2202 | ssize_t len; /* -1 = variable */ | |
2203 | const char *name; | |
2204 | } rp_cmd_args[] = { | |
2205 | [MIG_RP_MSG_INVALID] = { .len = -1, .name = "INVALID" }, | |
2206 | [MIG_RP_MSG_SHUT] = { .len = 4, .name = "SHUT" }, | |
2207 | [MIG_RP_MSG_PONG] = { .len = 4, .name = "PONG" }, | |
1e2d90eb DDAG |
2208 | [MIG_RP_MSG_REQ_PAGES] = { .len = 12, .name = "REQ_PAGES" }, |
2209 | [MIG_RP_MSG_REQ_PAGES_ID] = { .len = -1, .name = "REQ_PAGES_ID" }, | |
a335debb | 2210 | [MIG_RP_MSG_RECV_BITMAP] = { .len = -1, .name = "RECV_BITMAP" }, |
13955b89 | 2211 | [MIG_RP_MSG_RESUME_ACK] = { .len = 4, .name = "RESUME_ACK" }, |
70b20477 DDAG |
2212 | [MIG_RP_MSG_MAX] = { .len = -1, .name = "MAX" }, |
2213 | }; | |
2214 | ||
1e2d90eb DDAG |
2215 | /* |
2216 | * Process a request for pages received on the return path, | |
2217 | * We're allowed to send more than requested (e.g. to round to our page size) | |
2218 | * and we don't need to send pages that have already been sent. | |
2219 | */ | |
2220 | static void migrate_handle_rp_req_pages(MigrationState *ms, const char* rbname, | |
2221 | ram_addr_t start, size_t len) | |
2222 | { | |
6c595cde DDAG |
2223 | long our_host_ps = getpagesize(); |
2224 | ||
1e2d90eb | 2225 | trace_migrate_handle_rp_req_pages(rbname, start, len); |
6c595cde DDAG |
2226 | |
2227 | /* | |
2228 | * Since we currently insist on matching page sizes, just sanity check | |
2229 | * we're being asked for whole host pages. | |
2230 | */ | |
2231 | if (start & (our_host_ps-1) || | |
2232 | (len & (our_host_ps-1))) { | |
2233 | error_report("%s: Misaligned page request, start: " RAM_ADDR_FMT | |
2234 | " len: %zd", __func__, start, len); | |
2235 | mark_source_rp_bad(ms); | |
2236 | return; | |
2237 | } | |
2238 | ||
96506894 | 2239 | if (ram_save_queue_pages(rbname, start, len)) { |
6c595cde DDAG |
2240 | mark_source_rp_bad(ms); |
2241 | } | |
1e2d90eb DDAG |
2242 | } |
2243 | ||
14b1742e PX |
2244 | /* Return true to retry, false to quit */ |
2245 | static bool postcopy_pause_return_path_thread(MigrationState *s) | |
2246 | { | |
2247 | trace_postcopy_pause_return_path(); | |
2248 | ||
2249 | qemu_sem_wait(&s->postcopy_pause_rp_sem); | |
2250 | ||
2251 | trace_postcopy_pause_return_path_continued(); | |
2252 | ||
2253 | return true; | |
2254 | } | |
2255 | ||
a335debb PX |
2256 | static int migrate_handle_rp_recv_bitmap(MigrationState *s, char *block_name) |
2257 | { | |
2258 | RAMBlock *block = qemu_ram_block_by_name(block_name); | |
2259 | ||
2260 | if (!block) { | |
2261 | error_report("%s: invalid block name '%s'", __func__, block_name); | |
2262 | return -EINVAL; | |
2263 | } | |
2264 | ||
2265 | /* Fetch the received bitmap and refresh the dirty bitmap */ | |
2266 | return ram_dirty_bitmap_reload(s, block); | |
2267 | } | |
2268 | ||
13955b89 PX |
2269 | static int migrate_handle_rp_resume_ack(MigrationState *s, uint32_t value) |
2270 | { | |
2271 | trace_source_return_path_thread_resume_ack(value); | |
2272 | ||
2273 | if (value != MIGRATION_RESUME_ACK_VALUE) { | |
2274 | error_report("%s: illegal resume_ack value %"PRIu32, | |
2275 | __func__, value); | |
2276 | return -1; | |
2277 | } | |
2278 | ||
2279 | /* Now both sides are active. */ | |
2280 | migrate_set_state(&s->state, MIGRATION_STATUS_POSTCOPY_RECOVER, | |
2281 | MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
2282 | ||
94190696 PX |
2283 | /* Notify send thread that time to continue send pages */ |
2284 | qemu_sem_post(&s->rp_state.rp_sem); | |
13955b89 PX |
2285 | |
2286 | return 0; | |
2287 | } | |
2288 | ||
70b20477 DDAG |
2289 | /* |
2290 | * Handles messages sent on the return path towards the source VM | |
2291 | * | |
2292 | */ | |
2293 | static void *source_return_path_thread(void *opaque) | |
2294 | { | |
2295 | MigrationState *ms = opaque; | |
2296 | QEMUFile *rp = ms->rp_state.from_dst_file; | |
2297 | uint16_t header_len, header_type; | |
568b01ca | 2298 | uint8_t buf[512]; |
70b20477 | 2299 | uint32_t tmp32, sibling_error; |
1e2d90eb DDAG |
2300 | ram_addr_t start = 0; /* =0 to silence warning */ |
2301 | size_t len = 0, expected_len; | |
70b20477 DDAG |
2302 | int res; |
2303 | ||
2304 | trace_source_return_path_thread_entry(); | |
74637e6f | 2305 | rcu_register_thread(); |
14b1742e PX |
2306 | |
2307 | retry: | |
70b20477 DDAG |
2308 | while (!ms->rp_state.error && !qemu_file_get_error(rp) && |
2309 | migration_is_setup_or_active(ms->state)) { | |
2310 | trace_source_return_path_thread_loop_top(); | |
2311 | header_type = qemu_get_be16(rp); | |
2312 | header_len = qemu_get_be16(rp); | |
2313 | ||
7a9ddfbf PX |
2314 | if (qemu_file_get_error(rp)) { |
2315 | mark_source_rp_bad(ms); | |
2316 | goto out; | |
2317 | } | |
2318 | ||
70b20477 DDAG |
2319 | if (header_type >= MIG_RP_MSG_MAX || |
2320 | header_type == MIG_RP_MSG_INVALID) { | |
2321 | error_report("RP: Received invalid message 0x%04x length 0x%04x", | |
2322 | header_type, header_len); | |
2323 | mark_source_rp_bad(ms); | |
2324 | goto out; | |
2325 | } | |
2326 | ||
2327 | if ((rp_cmd_args[header_type].len != -1 && | |
2328 | header_len != rp_cmd_args[header_type].len) || | |
568b01ca | 2329 | header_len > sizeof(buf)) { |
70b20477 DDAG |
2330 | error_report("RP: Received '%s' message (0x%04x) with" |
2331 | "incorrect length %d expecting %zu", | |
2332 | rp_cmd_args[header_type].name, header_type, header_len, | |
2333 | (size_t)rp_cmd_args[header_type].len); | |
2334 | mark_source_rp_bad(ms); | |
2335 | goto out; | |
2336 | } | |
2337 | ||
2338 | /* We know we've got a valid header by this point */ | |
2339 | res = qemu_get_buffer(rp, buf, header_len); | |
2340 | if (res != header_len) { | |
2341 | error_report("RP: Failed reading data for message 0x%04x" | |
2342 | " read %d expected %d", | |
2343 | header_type, res, header_len); | |
2344 | mark_source_rp_bad(ms); | |
2345 | goto out; | |
2346 | } | |
2347 | ||
2348 | /* OK, we have the message and the data */ | |
2349 | switch (header_type) { | |
2350 | case MIG_RP_MSG_SHUT: | |
4d885131 | 2351 | sibling_error = ldl_be_p(buf); |
70b20477 DDAG |
2352 | trace_source_return_path_thread_shut(sibling_error); |
2353 | if (sibling_error) { | |
2354 | error_report("RP: Sibling indicated error %d", sibling_error); | |
2355 | mark_source_rp_bad(ms); | |
2356 | } | |
2357 | /* | |
2358 | * We'll let the main thread deal with closing the RP | |
2359 | * we could do a shutdown(2) on it, but we're the only user | |
2360 | * anyway, so there's nothing gained. | |
2361 | */ | |
2362 | goto out; | |
2363 | ||
2364 | case MIG_RP_MSG_PONG: | |
4d885131 | 2365 | tmp32 = ldl_be_p(buf); |
70b20477 DDAG |
2366 | trace_source_return_path_thread_pong(tmp32); |
2367 | break; | |
2368 | ||
1e2d90eb | 2369 | case MIG_RP_MSG_REQ_PAGES: |
4d885131 PM |
2370 | start = ldq_be_p(buf); |
2371 | len = ldl_be_p(buf + 8); | |
1e2d90eb DDAG |
2372 | migrate_handle_rp_req_pages(ms, NULL, start, len); |
2373 | break; | |
2374 | ||
2375 | case MIG_RP_MSG_REQ_PAGES_ID: | |
2376 | expected_len = 12 + 1; /* header + termination */ | |
2377 | ||
2378 | if (header_len >= expected_len) { | |
4d885131 PM |
2379 | start = ldq_be_p(buf); |
2380 | len = ldl_be_p(buf + 8); | |
1e2d90eb DDAG |
2381 | /* Now we expect an idstr */ |
2382 | tmp32 = buf[12]; /* Length of the following idstr */ | |
2383 | buf[13 + tmp32] = '\0'; | |
2384 | expected_len += tmp32; | |
2385 | } | |
2386 | if (header_len != expected_len) { | |
2387 | error_report("RP: Req_Page_id with length %d expecting %zd", | |
2388 | header_len, expected_len); | |
2389 | mark_source_rp_bad(ms); | |
2390 | goto out; | |
2391 | } | |
2392 | migrate_handle_rp_req_pages(ms, (char *)&buf[13], start, len); | |
2393 | break; | |
2394 | ||
a335debb PX |
2395 | case MIG_RP_MSG_RECV_BITMAP: |
2396 | if (header_len < 1) { | |
2397 | error_report("%s: missing block name", __func__); | |
2398 | mark_source_rp_bad(ms); | |
2399 | goto out; | |
2400 | } | |
2401 | /* Format: len (1B) + idstr (<255B). This ends the idstr. */ | |
2402 | buf[buf[0] + 1] = '\0'; | |
2403 | if (migrate_handle_rp_recv_bitmap(ms, (char *)(buf + 1))) { | |
2404 | mark_source_rp_bad(ms); | |
2405 | goto out; | |
2406 | } | |
2407 | break; | |
2408 | ||
13955b89 PX |
2409 | case MIG_RP_MSG_RESUME_ACK: |
2410 | tmp32 = ldl_be_p(buf); | |
2411 | if (migrate_handle_rp_resume_ack(ms, tmp32)) { | |
2412 | mark_source_rp_bad(ms); | |
2413 | goto out; | |
2414 | } | |
2415 | break; | |
2416 | ||
70b20477 DDAG |
2417 | default: |
2418 | break; | |
2419 | } | |
2420 | } | |
14b1742e PX |
2421 | |
2422 | out: | |
2423 | res = qemu_file_get_error(rp); | |
2424 | if (res) { | |
2425 | if (res == -EIO) { | |
2426 | /* | |
2427 | * Maybe there is something we can do: it looks like a | |
2428 | * network down issue, and we pause for a recovery. | |
2429 | */ | |
2430 | if (postcopy_pause_return_path_thread(ms)) { | |
2431 | /* Reload rp, reset the rest */ | |
0284a2a8 MAL |
2432 | if (rp != ms->rp_state.from_dst_file) { |
2433 | qemu_fclose(rp); | |
2434 | rp = ms->rp_state.from_dst_file; | |
2435 | } | |
14b1742e PX |
2436 | ms->rp_state.error = false; |
2437 | goto retry; | |
2438 | } | |
2439 | } | |
2440 | ||
70b20477 DDAG |
2441 | trace_source_return_path_thread_bad_end(); |
2442 | mark_source_rp_bad(ms); | |
2443 | } | |
2444 | ||
2445 | trace_source_return_path_thread_end(); | |
70b20477 DDAG |
2446 | ms->rp_state.from_dst_file = NULL; |
2447 | qemu_fclose(rp); | |
74637e6f | 2448 | rcu_unregister_thread(); |
70b20477 DDAG |
2449 | return NULL; |
2450 | } | |
2451 | ||
d3e35b8f PX |
2452 | static int open_return_path_on_source(MigrationState *ms, |
2453 | bool create_thread) | |
70b20477 DDAG |
2454 | { |
2455 | ||
89a02a9f | 2456 | ms->rp_state.from_dst_file = qemu_file_get_return_path(ms->to_dst_file); |
70b20477 DDAG |
2457 | if (!ms->rp_state.from_dst_file) { |
2458 | return -1; | |
2459 | } | |
2460 | ||
2461 | trace_open_return_path_on_source(); | |
d3e35b8f PX |
2462 | |
2463 | if (!create_thread) { | |
2464 | /* We're done */ | |
2465 | return 0; | |
2466 | } | |
2467 | ||
70b20477 DDAG |
2468 | qemu_thread_create(&ms->rp_state.rp_thread, "return path", |
2469 | source_return_path_thread, ms, QEMU_THREAD_JOINABLE); | |
2470 | ||
2471 | trace_open_return_path_on_source_continue(); | |
2472 | ||
2473 | return 0; | |
2474 | } | |
2475 | ||
70b20477 DDAG |
2476 | /* Returns 0 if the RP was ok, otherwise there was an error on the RP */ |
2477 | static int await_return_path_close_on_source(MigrationState *ms) | |
2478 | { | |
2479 | /* | |
2480 | * If this is a normal exit then the destination will send a SHUT and the | |
2481 | * rp_thread will exit, however if there's an error we need to cause | |
2482 | * it to exit. | |
2483 | */ | |
89a02a9f | 2484 | if (qemu_file_get_error(ms->to_dst_file) && ms->rp_state.from_dst_file) { |
70b20477 DDAG |
2485 | /* |
2486 | * shutdown(2), if we have it, will cause it to unblock if it's stuck | |
2487 | * waiting for the destination. | |
2488 | */ | |
2489 | qemu_file_shutdown(ms->rp_state.from_dst_file); | |
2490 | mark_source_rp_bad(ms); | |
2491 | } | |
2492 | trace_await_return_path_close_on_source_joining(); | |
2493 | qemu_thread_join(&ms->rp_state.rp_thread); | |
2494 | trace_await_return_path_close_on_source_close(); | |
2495 | return ms->rp_state.error; | |
2496 | } | |
2497 | ||
1d34e4bf DDAG |
2498 | /* |
2499 | * Switch from normal iteration to postcopy | |
2500 | * Returns non-0 on error | |
2501 | */ | |
7287cbd4 | 2502 | static int postcopy_start(MigrationState *ms) |
1d34e4bf DDAG |
2503 | { |
2504 | int ret; | |
61b67d47 DB |
2505 | QIOChannelBuffer *bioc; |
2506 | QEMUFile *fb; | |
1d34e4bf | 2507 | int64_t time_at_stop = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
7e555c6c | 2508 | int64_t bandwidth = migrate_max_postcopy_bandwidth(); |
ef8d6488 | 2509 | bool restart_block = false; |
0331c8ca DDAG |
2510 | int cur_state = MIGRATION_STATUS_ACTIVE; |
2511 | if (!migrate_pause_before_switchover()) { | |
2512 | migrate_set_state(&ms->state, MIGRATION_STATUS_ACTIVE, | |
2513 | MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
2514 | } | |
1d34e4bf DDAG |
2515 | |
2516 | trace_postcopy_start(); | |
2517 | qemu_mutex_lock_iothread(); | |
2518 | trace_postcopy_start_set_run(); | |
2519 | ||
fb064112 | 2520 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); |
1d34e4bf DDAG |
2521 | global_state_store(); |
2522 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); | |
76b1c7fe KW |
2523 | if (ret < 0) { |
2524 | goto fail; | |
2525 | } | |
1d34e4bf | 2526 | |
0331c8ca DDAG |
2527 | ret = migration_maybe_pause(ms, &cur_state, |
2528 | MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
2529 | if (ret < 0) { | |
2530 | goto fail; | |
2531 | } | |
2532 | ||
76b1c7fe | 2533 | ret = bdrv_inactivate_all(); |
1d34e4bf DDAG |
2534 | if (ret < 0) { |
2535 | goto fail; | |
2536 | } | |
ef8d6488 | 2537 | restart_block = true; |
1d34e4bf | 2538 | |
1c0d249d DDAG |
2539 | /* |
2540 | * Cause any non-postcopiable, but iterative devices to | |
2541 | * send out their final data. | |
2542 | */ | |
a1fbe750 | 2543 | qemu_savevm_state_complete_precopy(ms->to_dst_file, true, false); |
1c0d249d | 2544 | |
1d34e4bf DDAG |
2545 | /* |
2546 | * in Finish migrate and with the io-lock held everything should | |
2547 | * be quiet, but we've potentially still got dirty pages and we | |
2548 | * need to tell the destination to throw any pages it's already received | |
2549 | * that are dirty | |
2550 | */ | |
58110f0a VSO |
2551 | if (migrate_postcopy_ram()) { |
2552 | if (ram_postcopy_send_discard_bitmap(ms)) { | |
2553 | error_report("postcopy send discard bitmap failed"); | |
2554 | goto fail; | |
2555 | } | |
1d34e4bf DDAG |
2556 | } |
2557 | ||
2558 | /* | |
2559 | * send rest of state - note things that are doing postcopy | |
2560 | * will notice we're in POSTCOPY_ACTIVE and not actually | |
2561 | * wrap their state up here | |
2562 | */ | |
7e555c6c DDAG |
2563 | /* 0 max-postcopy-bandwidth means unlimited */ |
2564 | if (!bandwidth) { | |
2565 | qemu_file_set_rate_limit(ms->to_dst_file, INT64_MAX); | |
2566 | } else { | |
2567 | qemu_file_set_rate_limit(ms->to_dst_file, bandwidth / XFER_LIMIT_RATIO); | |
2568 | } | |
58110f0a VSO |
2569 | if (migrate_postcopy_ram()) { |
2570 | /* Ping just for debugging, helps line traces up */ | |
2571 | qemu_savevm_send_ping(ms->to_dst_file, 2); | |
2572 | } | |
1d34e4bf DDAG |
2573 | |
2574 | /* | |
2575 | * While loading the device state we may trigger page transfer | |
2576 | * requests and the fd must be free to process those, and thus | |
2577 | * the destination must read the whole device state off the fd before | |
2578 | * it starts processing it. Unfortunately the ad-hoc migration format | |
2579 | * doesn't allow the destination to know the size to read without fully | |
2580 | * parsing it through each devices load-state code (especially the open | |
2581 | * coded devices that use get/put). | |
2582 | * So we wrap the device state up in a package with a length at the start; | |
2583 | * to do this we use a qemu_buf to hold the whole of the device state. | |
2584 | */ | |
61b67d47 | 2585 | bioc = qio_channel_buffer_new(4096); |
6f01f136 | 2586 | qio_channel_set_name(QIO_CHANNEL(bioc), "migration-postcopy-buffer"); |
61b67d47 DB |
2587 | fb = qemu_fopen_channel_output(QIO_CHANNEL(bioc)); |
2588 | object_unref(OBJECT(bioc)); | |
1d34e4bf | 2589 | |
c76201ab DDAG |
2590 | /* |
2591 | * Make sure the receiver can get incoming pages before we send the rest | |
2592 | * of the state | |
2593 | */ | |
2594 | qemu_savevm_send_postcopy_listen(fb); | |
2595 | ||
a1fbe750 | 2596 | qemu_savevm_state_complete_precopy(fb, false, false); |
58110f0a VSO |
2597 | if (migrate_postcopy_ram()) { |
2598 | qemu_savevm_send_ping(fb, 3); | |
2599 | } | |
1d34e4bf DDAG |
2600 | |
2601 | qemu_savevm_send_postcopy_run(fb); | |
2602 | ||
2603 | /* <><> end of stuff going into the package */ | |
1d34e4bf | 2604 | |
ef8d6488 DDAG |
2605 | /* Last point of recovery; as soon as we send the package the destination |
2606 | * can open devices and potentially start running. | |
2607 | * Lets just check again we've not got any errors. | |
2608 | */ | |
2609 | ret = qemu_file_get_error(ms->to_dst_file); | |
2610 | if (ret) { | |
2611 | error_report("postcopy_start: Migration stream errored (pre package)"); | |
2612 | goto fail_closefb; | |
2613 | } | |
2614 | ||
2615 | restart_block = false; | |
2616 | ||
1d34e4bf | 2617 | /* Now send that blob */ |
61b67d47 | 2618 | if (qemu_savevm_send_packaged(ms->to_dst_file, bioc->data, bioc->usage)) { |
1d34e4bf DDAG |
2619 | goto fail_closefb; |
2620 | } | |
2621 | qemu_fclose(fb); | |
b82fc321 DDAG |
2622 | |
2623 | /* Send a notify to give a chance for anything that needs to happen | |
2624 | * at the transition to postcopy and after the device state; in particular | |
2625 | * spice needs to trigger a transition now | |
2626 | */ | |
2627 | ms->postcopy_after_devices = true; | |
2628 | notifier_list_notify(&migration_state_notifiers, ms); | |
2629 | ||
1d34e4bf DDAG |
2630 | ms->downtime = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) - time_at_stop; |
2631 | ||
2632 | qemu_mutex_unlock_iothread(); | |
2633 | ||
58110f0a VSO |
2634 | if (migrate_postcopy_ram()) { |
2635 | /* | |
2636 | * Although this ping is just for debug, it could potentially be | |
2637 | * used for getting a better measurement of downtime at the source. | |
2638 | */ | |
2639 | qemu_savevm_send_ping(ms->to_dst_file, 4); | |
2640 | } | |
1d34e4bf | 2641 | |
ced1c616 PB |
2642 | if (migrate_release_ram()) { |
2643 | ram_postcopy_migrated_memory_release(ms); | |
2644 | } | |
2645 | ||
89a02a9f | 2646 | ret = qemu_file_get_error(ms->to_dst_file); |
1d34e4bf DDAG |
2647 | if (ret) { |
2648 | error_report("postcopy_start: Migration stream errored"); | |
48781e5b | 2649 | migrate_set_state(&ms->state, MIGRATION_STATUS_POSTCOPY_ACTIVE, |
1d34e4bf DDAG |
2650 | MIGRATION_STATUS_FAILED); |
2651 | } | |
2652 | ||
2653 | return ret; | |
2654 | ||
2655 | fail_closefb: | |
2656 | qemu_fclose(fb); | |
2657 | fail: | |
48781e5b | 2658 | migrate_set_state(&ms->state, MIGRATION_STATUS_POSTCOPY_ACTIVE, |
1d34e4bf | 2659 | MIGRATION_STATUS_FAILED); |
ef8d6488 DDAG |
2660 | if (restart_block) { |
2661 | /* A failure happened early enough that we know the destination hasn't | |
2662 | * accessed block devices, so we're safe to recover. | |
2663 | */ | |
2664 | Error *local_err = NULL; | |
2665 | ||
2666 | bdrv_invalidate_cache_all(&local_err); | |
2667 | if (local_err) { | |
2668 | error_report_err(local_err); | |
2669 | } | |
2670 | } | |
1d34e4bf DDAG |
2671 | qemu_mutex_unlock_iothread(); |
2672 | return -1; | |
2673 | } | |
2674 | ||
e91d8951 DDAG |
2675 | /** |
2676 | * migration_maybe_pause: Pause if required to by | |
2677 | * migrate_pause_before_switchover called with the iothread locked | |
2678 | * Returns: 0 on success | |
2679 | */ | |
0331c8ca DDAG |
2680 | static int migration_maybe_pause(MigrationState *s, |
2681 | int *current_active_state, | |
2682 | int new_state) | |
e91d8951 DDAG |
2683 | { |
2684 | if (!migrate_pause_before_switchover()) { | |
2685 | return 0; | |
2686 | } | |
2687 | ||
2688 | /* Since leaving this state is not atomic with posting the semaphore | |
2689 | * it's possible that someone could have issued multiple migrate_continue | |
2690 | * and the semaphore is incorrectly positive at this point; | |
2691 | * the docs say it's undefined to reinit a semaphore that's already | |
2692 | * init'd, so use timedwait to eat up any existing posts. | |
2693 | */ | |
2694 | while (qemu_sem_timedwait(&s->pause_sem, 1) == 0) { | |
2695 | /* This block intentionally left blank */ | |
2696 | } | |
2697 | ||
2698 | qemu_mutex_unlock_iothread(); | |
2699 | migrate_set_state(&s->state, *current_active_state, | |
2700 | MIGRATION_STATUS_PRE_SWITCHOVER); | |
2701 | qemu_sem_wait(&s->pause_sem); | |
2702 | migrate_set_state(&s->state, MIGRATION_STATUS_PRE_SWITCHOVER, | |
0331c8ca DDAG |
2703 | new_state); |
2704 | *current_active_state = new_state; | |
e91d8951 DDAG |
2705 | qemu_mutex_lock_iothread(); |
2706 | ||
0331c8ca | 2707 | return s->state == new_state ? 0 : -EINVAL; |
e91d8951 DDAG |
2708 | } |
2709 | ||
09f6c85e DDAG |
2710 | /** |
2711 | * migration_completion: Used by migration_thread when there's not much left. | |
2712 | * The caller 'breaks' the loop when this returns. | |
2713 | * | |
2714 | * @s: Current migration state | |
09f6c85e | 2715 | */ |
2ad87305 | 2716 | static void migration_completion(MigrationState *s) |
09f6c85e DDAG |
2717 | { |
2718 | int ret; | |
2ad87305 | 2719 | int current_active_state = s->state; |
09f6c85e | 2720 | |
b10ac0c4 DDAG |
2721 | if (s->state == MIGRATION_STATUS_ACTIVE) { |
2722 | qemu_mutex_lock_iothread(); | |
64909f97 | 2723 | s->downtime_start = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
fb064112 | 2724 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); |
7287cbd4 | 2725 | s->vm_was_running = runstate_is_running(); |
b10ac0c4 DDAG |
2726 | ret = global_state_store(); |
2727 | ||
2728 | if (!ret) { | |
a1fbe750 | 2729 | bool inactivate = !migrate_colo_enabled(); |
b10ac0c4 | 2730 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); |
e91d8951 | 2731 | if (ret >= 0) { |
0331c8ca DDAG |
2732 | ret = migration_maybe_pause(s, ¤t_active_state, |
2733 | MIGRATION_STATUS_DEVICE); | |
e91d8951 | 2734 | } |
f07fa4cb KW |
2735 | if (ret >= 0) { |
2736 | qemu_file_set_rate_limit(s->to_dst_file, INT64_MAX); | |
a1fbe750 FZ |
2737 | ret = qemu_savevm_state_complete_precopy(s->to_dst_file, false, |
2738 | inactivate); | |
f07fa4cb | 2739 | } |
a1fbe750 FZ |
2740 | if (inactivate && ret >= 0) { |
2741 | s->block_inactive = true; | |
b10ac0c4 DDAG |
2742 | } |
2743 | } | |
2744 | qemu_mutex_unlock_iothread(); | |
09f6c85e | 2745 | |
b10ac0c4 DDAG |
2746 | if (ret < 0) { |
2747 | goto fail; | |
09f6c85e | 2748 | } |
b10ac0c4 DDAG |
2749 | } else if (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { |
2750 | trace_migration_completion_postcopy_end(); | |
2751 | ||
89a02a9f | 2752 | qemu_savevm_state_complete_postcopy(s->to_dst_file); |
b10ac0c4 | 2753 | trace_migration_completion_postcopy_end_after_complete(); |
09f6c85e | 2754 | } |
09f6c85e | 2755 | |
b10ac0c4 DDAG |
2756 | /* |
2757 | * If rp was opened we must clean up the thread before | |
2758 | * cleaning everything else up (since if there are no failures | |
2759 | * it will wait for the destination to send it's status in | |
2760 | * a SHUT command). | |
b10ac0c4 | 2761 | */ |
0425dc97 | 2762 | if (s->rp_state.from_dst_file) { |
b10ac0c4 | 2763 | int rp_error; |
0425dc97 | 2764 | trace_migration_return_path_end_before(); |
b10ac0c4 | 2765 | rp_error = await_return_path_close_on_source(s); |
0425dc97 | 2766 | trace_migration_return_path_end_after(rp_error); |
b10ac0c4 | 2767 | if (rp_error) { |
fe904ea8 | 2768 | goto fail_invalidate; |
b10ac0c4 | 2769 | } |
09f6c85e DDAG |
2770 | } |
2771 | ||
89a02a9f | 2772 | if (qemu_file_get_error(s->to_dst_file)) { |
09f6c85e | 2773 | trace_migration_completion_file_err(); |
fe904ea8 | 2774 | goto fail_invalidate; |
09f6c85e DDAG |
2775 | } |
2776 | ||
0b827d5e HZ |
2777 | if (!migrate_colo_enabled()) { |
2778 | migrate_set_state(&s->state, current_active_state, | |
2779 | MIGRATION_STATUS_COMPLETED); | |
2780 | } | |
2781 | ||
09f6c85e DDAG |
2782 | return; |
2783 | ||
fe904ea8 GK |
2784 | fail_invalidate: |
2785 | /* If not doing postcopy, vm_start() will be called: let's regain | |
2786 | * control on images. | |
2787 | */ | |
6039dd5b DDAG |
2788 | if (s->state == MIGRATION_STATUS_ACTIVE || |
2789 | s->state == MIGRATION_STATUS_DEVICE) { | |
fe904ea8 GK |
2790 | Error *local_err = NULL; |
2791 | ||
1d2acc31 | 2792 | qemu_mutex_lock_iothread(); |
fe904ea8 GK |
2793 | bdrv_invalidate_cache_all(&local_err); |
2794 | if (local_err) { | |
2795 | error_report_err(local_err); | |
1d2acc31 HZ |
2796 | } else { |
2797 | s->block_inactive = false; | |
fe904ea8 | 2798 | } |
1d2acc31 | 2799 | qemu_mutex_unlock_iothread(); |
fe904ea8 GK |
2800 | } |
2801 | ||
09f6c85e | 2802 | fail: |
48781e5b HZ |
2803 | migrate_set_state(&s->state, current_active_state, |
2804 | MIGRATION_STATUS_FAILED); | |
09f6c85e DDAG |
2805 | } |
2806 | ||
35a6ed4f HZ |
2807 | bool migrate_colo_enabled(void) |
2808 | { | |
2809 | MigrationState *s = migrate_get_current(); | |
2810 | return s->enabled_capabilities[MIGRATION_CAPABILITY_X_COLO]; | |
2811 | } | |
2812 | ||
b23c2ade PX |
2813 | typedef enum MigThrError { |
2814 | /* No error detected */ | |
2815 | MIG_THR_ERR_NONE = 0, | |
2816 | /* Detected error, but resumed successfully */ | |
2817 | MIG_THR_ERR_RECOVERED = 1, | |
2818 | /* Detected fatal error, need to exit */ | |
2819 | MIG_THR_ERR_FATAL = 2, | |
2820 | } MigThrError; | |
2821 | ||
94190696 PX |
2822 | static int postcopy_resume_handshake(MigrationState *s) |
2823 | { | |
2824 | qemu_savevm_send_postcopy_resume(s->to_dst_file); | |
2825 | ||
2826 | while (s->state == MIGRATION_STATUS_POSTCOPY_RECOVER) { | |
2827 | qemu_sem_wait(&s->rp_state.rp_sem); | |
2828 | } | |
2829 | ||
2830 | if (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { | |
2831 | return 0; | |
2832 | } | |
2833 | ||
2834 | return -1; | |
2835 | } | |
2836 | ||
135b87b4 PX |
2837 | /* Return zero if success, or <0 for error */ |
2838 | static int postcopy_do_resume(MigrationState *s) | |
2839 | { | |
d1b8eadb PX |
2840 | int ret; |
2841 | ||
2842 | /* | |
2843 | * Call all the resume_prepare() hooks, so that modules can be | |
2844 | * ready for the migration resume. | |
2845 | */ | |
2846 | ret = qemu_savevm_state_resume_prepare(s); | |
2847 | if (ret) { | |
2848 | error_report("%s: resume_prepare() failure detected: %d", | |
2849 | __func__, ret); | |
2850 | return ret; | |
2851 | } | |
2852 | ||
2853 | /* | |
94190696 PX |
2854 | * Last handshake with destination on the resume (destination will |
2855 | * switch to postcopy-active afterwards) | |
d1b8eadb | 2856 | */ |
94190696 PX |
2857 | ret = postcopy_resume_handshake(s); |
2858 | if (ret) { | |
2859 | error_report("%s: handshake failed: %d", __func__, ret); | |
2860 | return ret; | |
2861 | } | |
d1b8eadb | 2862 | |
135b87b4 PX |
2863 | return 0; |
2864 | } | |
2865 | ||
b23c2ade PX |
2866 | /* |
2867 | * We don't return until we are in a safe state to continue current | |
2868 | * postcopy migration. Returns MIG_THR_ERR_RECOVERED if recovered, or | |
2869 | * MIG_THR_ERR_FATAL if unrecovery failure happened. | |
2870 | */ | |
2871 | static MigThrError postcopy_pause(MigrationState *s) | |
2872 | { | |
2873 | assert(s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
b23c2ade | 2874 | |
135b87b4 | 2875 | while (true) { |
62df066f PX |
2876 | QEMUFile *file; |
2877 | ||
135b87b4 PX |
2878 | migrate_set_state(&s->state, s->state, |
2879 | MIGRATION_STATUS_POSTCOPY_PAUSED); | |
b23c2ade | 2880 | |
135b87b4 PX |
2881 | /* Current channel is possibly broken. Release it. */ |
2882 | assert(s->to_dst_file); | |
62df066f PX |
2883 | qemu_mutex_lock(&s->qemu_file_lock); |
2884 | file = s->to_dst_file; | |
135b87b4 | 2885 | s->to_dst_file = NULL; |
62df066f PX |
2886 | qemu_mutex_unlock(&s->qemu_file_lock); |
2887 | ||
2888 | qemu_file_shutdown(file); | |
2889 | qemu_fclose(file); | |
b23c2ade | 2890 | |
135b87b4 PX |
2891 | error_report("Detected IO failure for postcopy. " |
2892 | "Migration paused."); | |
b23c2ade | 2893 | |
135b87b4 PX |
2894 | /* |
2895 | * We wait until things fixed up. Then someone will setup the | |
2896 | * status back for us. | |
2897 | */ | |
2898 | while (s->state == MIGRATION_STATUS_POSTCOPY_PAUSED) { | |
2899 | qemu_sem_wait(&s->postcopy_pause_sem); | |
2900 | } | |
2901 | ||
2902 | if (s->state == MIGRATION_STATUS_POSTCOPY_RECOVER) { | |
2903 | /* Woken up by a recover procedure. Give it a shot */ | |
b23c2ade | 2904 | |
135b87b4 PX |
2905 | /* |
2906 | * Firstly, let's wake up the return path now, with a new | |
2907 | * return path channel. | |
2908 | */ | |
2909 | qemu_sem_post(&s->postcopy_pause_rp_sem); | |
2910 | ||
2911 | /* Do the resume logic */ | |
2912 | if (postcopy_do_resume(s) == 0) { | |
2913 | /* Let's continue! */ | |
2914 | trace_postcopy_pause_continued(); | |
2915 | return MIG_THR_ERR_RECOVERED; | |
2916 | } else { | |
2917 | /* | |
2918 | * Something wrong happened during the recovery, let's | |
2919 | * pause again. Pause is always better than throwing | |
2920 | * data away. | |
2921 | */ | |
2922 | continue; | |
2923 | } | |
2924 | } else { | |
2925 | /* This is not right... Time to quit. */ | |
2926 | return MIG_THR_ERR_FATAL; | |
2927 | } | |
2928 | } | |
b23c2ade PX |
2929 | } |
2930 | ||
2931 | static MigThrError migration_detect_error(MigrationState *s) | |
2932 | { | |
2933 | int ret; | |
c3c5eae6 DDAG |
2934 | int state = s->state; |
2935 | ||
2936 | if (state == MIGRATION_STATUS_CANCELLING || | |
2937 | state == MIGRATION_STATUS_CANCELLED) { | |
2938 | /* End the migration, but don't set the state to failed */ | |
2939 | return MIG_THR_ERR_FATAL; | |
2940 | } | |
b23c2ade PX |
2941 | |
2942 | /* Try to detect any file errors */ | |
2943 | ret = qemu_file_get_error(s->to_dst_file); | |
2944 | ||
2945 | if (!ret) { | |
2946 | /* Everything is fine */ | |
2947 | return MIG_THR_ERR_NONE; | |
2948 | } | |
2949 | ||
c3c5eae6 | 2950 | if (state == MIGRATION_STATUS_POSTCOPY_ACTIVE && ret == -EIO) { |
b23c2ade PX |
2951 | /* |
2952 | * For postcopy, we allow the network to be down for a | |
2953 | * while. After that, it can be continued by a | |
2954 | * recovery phase. | |
2955 | */ | |
2956 | return postcopy_pause(s); | |
2957 | } else { | |
2958 | /* | |
2959 | * For precopy (or postcopy with error outside IO), we fail | |
2960 | * with no time. | |
2961 | */ | |
c3c5eae6 | 2962 | migrate_set_state(&s->state, state, MIGRATION_STATUS_FAILED); |
b23c2ade PX |
2963 | trace_migration_thread_file_err(); |
2964 | ||
2965 | /* Time to stop the migration, now. */ | |
2966 | return MIG_THR_ERR_FATAL; | |
2967 | } | |
2968 | } | |
2969 | ||
0c8f0efd JQ |
2970 | /* How many bytes have we transferred since the beggining of the migration */ |
2971 | static uint64_t migration_total_bytes(MigrationState *s) | |
2972 | { | |
b9ee2f7d | 2973 | return qemu_ftell(s->to_dst_file) + ram_counters.multifd_bytes; |
0c8f0efd JQ |
2974 | } |
2975 | ||
cf011f08 PX |
2976 | static void migration_calculate_complete(MigrationState *s) |
2977 | { | |
0c8f0efd | 2978 | uint64_t bytes = migration_total_bytes(s); |
cf011f08 | 2979 | int64_t end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
6cde6fbe | 2980 | int64_t transfer_time; |
cf011f08 PX |
2981 | |
2982 | s->total_time = end_time - s->start_time; | |
2983 | if (!s->downtime) { | |
2984 | /* | |
2985 | * It's still not set, so we are precopy migration. For | |
2986 | * postcopy, downtime is calculated during postcopy_start(). | |
2987 | */ | |
2988 | s->downtime = end_time - s->downtime_start; | |
2989 | } | |
2990 | ||
6cde6fbe JQ |
2991 | transfer_time = s->total_time - s->setup_time; |
2992 | if (transfer_time) { | |
2993 | s->mbps = ((double) bytes * 8.0) / transfer_time / 1000; | |
cf011f08 PX |
2994 | } |
2995 | } | |
2996 | ||
b15df1ae PX |
2997 | static void migration_update_counters(MigrationState *s, |
2998 | int64_t current_time) | |
2999 | { | |
aecbfe9c | 3000 | uint64_t transferred, transferred_pages, time_spent; |
0c8f0efd | 3001 | uint64_t current_bytes; /* bytes transferred since the beginning */ |
b15df1ae PX |
3002 | double bandwidth; |
3003 | ||
3004 | if (current_time < s->iteration_start_time + BUFFER_DELAY) { | |
3005 | return; | |
3006 | } | |
3007 | ||
0c8f0efd JQ |
3008 | current_bytes = migration_total_bytes(s); |
3009 | transferred = current_bytes - s->iteration_initial_bytes; | |
b15df1ae PX |
3010 | time_spent = current_time - s->iteration_start_time; |
3011 | bandwidth = (double)transferred / time_spent; | |
0781c1ed | 3012 | s->threshold_size = bandwidth * s->parameters.downtime_limit; |
b15df1ae PX |
3013 | |
3014 | s->mbps = (((double) transferred * 8.0) / | |
3015 | ((double) time_spent / 1000.0)) / 1000.0 / 1000.0; | |
3016 | ||
aecbfe9c XG |
3017 | transferred_pages = ram_get_total_transferred_pages() - |
3018 | s->iteration_initial_pages; | |
3019 | s->pages_per_second = (double) transferred_pages / | |
3020 | (((double) time_spent / 1000.0)); | |
3021 | ||
b15df1ae PX |
3022 | /* |
3023 | * if we haven't sent anything, we don't want to | |
3024 | * recalculate. 10000 is a small enough number for our purposes | |
3025 | */ | |
3026 | if (ram_counters.dirty_pages_rate && transferred > 10000) { | |
650af890 | 3027 | s->expected_downtime = ram_counters.remaining / bandwidth; |
b15df1ae PX |
3028 | } |
3029 | ||
3030 | qemu_file_reset_rate_limit(s->to_dst_file); | |
3031 | ||
3032 | s->iteration_start_time = current_time; | |
0c8f0efd | 3033 | s->iteration_initial_bytes = current_bytes; |
aecbfe9c | 3034 | s->iteration_initial_pages = ram_get_total_transferred_pages(); |
b15df1ae PX |
3035 | |
3036 | trace_migrate_transferred(transferred, time_spent, | |
0781c1ed | 3037 | bandwidth, s->threshold_size); |
b15df1ae PX |
3038 | } |
3039 | ||
2ad87305 PX |
3040 | /* Migration thread iteration status */ |
3041 | typedef enum { | |
3042 | MIG_ITERATE_RESUME, /* Resume current iteration */ | |
3043 | MIG_ITERATE_SKIP, /* Skip current iteration */ | |
3044 | MIG_ITERATE_BREAK, /* Break the loop */ | |
3045 | } MigIterateState; | |
3046 | ||
3047 | /* | |
3048 | * Return true if continue to the next iteration directly, false | |
3049 | * otherwise. | |
3050 | */ | |
3051 | static MigIterateState migration_iteration_run(MigrationState *s) | |
3052 | { | |
47995026 | 3053 | uint64_t pending_size, pend_pre, pend_compat, pend_post; |
2ad87305 PX |
3054 | bool in_postcopy = s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE; |
3055 | ||
47995026 VSO |
3056 | qemu_savevm_state_pending(s->to_dst_file, s->threshold_size, &pend_pre, |
3057 | &pend_compat, &pend_post); | |
3058 | pending_size = pend_pre + pend_compat + pend_post; | |
2ad87305 PX |
3059 | |
3060 | trace_migrate_pending(pending_size, s->threshold_size, | |
47995026 | 3061 | pend_pre, pend_compat, pend_post); |
2ad87305 PX |
3062 | |
3063 | if (pending_size && pending_size >= s->threshold_size) { | |
3064 | /* Still a significant amount to transfer */ | |
3065 | if (migrate_postcopy() && !in_postcopy && | |
47995026 | 3066 | pend_pre <= s->threshold_size && |
2ad87305 PX |
3067 | atomic_read(&s->start_postcopy)) { |
3068 | if (postcopy_start(s)) { | |
3069 | error_report("%s: postcopy failed to start", __func__); | |
3070 | } | |
3071 | return MIG_ITERATE_SKIP; | |
3072 | } | |
3073 | /* Just another iteration step */ | |
3074 | qemu_savevm_state_iterate(s->to_dst_file, | |
3075 | s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
3076 | } else { | |
3077 | trace_migration_thread_low_pending(pending_size); | |
3078 | migration_completion(s); | |
3079 | return MIG_ITERATE_BREAK; | |
3080 | } | |
3081 | ||
3082 | return MIG_ITERATE_RESUME; | |
3083 | } | |
3084 | ||
199aa6d4 PX |
3085 | static void migration_iteration_finish(MigrationState *s) |
3086 | { | |
3087 | /* If we enabled cpu throttling for auto-converge, turn it off. */ | |
3088 | cpu_throttle_stop(); | |
3089 | ||
3090 | qemu_mutex_lock_iothread(); | |
3091 | switch (s->state) { | |
3092 | case MIGRATION_STATUS_COMPLETED: | |
3093 | migration_calculate_complete(s); | |
3094 | runstate_set(RUN_STATE_POSTMIGRATE); | |
3095 | break; | |
3096 | ||
3097 | case MIGRATION_STATUS_ACTIVE: | |
3098 | /* | |
3099 | * We should really assert here, but since it's during | |
3100 | * migration, let's try to reduce the usage of assertions. | |
3101 | */ | |
3102 | if (!migrate_colo_enabled()) { | |
3103 | error_report("%s: critical error: calling COLO code without " | |
3104 | "COLO enabled", __func__); | |
3105 | } | |
3106 | migrate_start_colo_process(s); | |
3107 | /* | |
3108 | * Fixme: we will run VM in COLO no matter its old running state. | |
3109 | * After exited COLO, we will keep running. | |
3110 | */ | |
3111 | s->vm_was_running = true; | |
3112 | /* Fallthrough */ | |
3113 | case MIGRATION_STATUS_FAILED: | |
3114 | case MIGRATION_STATUS_CANCELLED: | |
57225e5f | 3115 | case MIGRATION_STATUS_CANCELLING: |
199aa6d4 PX |
3116 | if (s->vm_was_running) { |
3117 | vm_start(); | |
3118 | } else { | |
3119 | if (runstate_check(RUN_STATE_FINISH_MIGRATE)) { | |
3120 | runstate_set(RUN_STATE_POSTMIGRATE); | |
3121 | } | |
3122 | } | |
3123 | break; | |
3124 | ||
3125 | default: | |
3126 | /* Should not reach here, but if so, forgive the VM. */ | |
3127 | error_report("%s: Unknown ending state %d", __func__, s->state); | |
3128 | break; | |
3129 | } | |
3130 | qemu_bh_schedule(s->cleanup_bh); | |
3131 | qemu_mutex_unlock_iothread(); | |
3132 | } | |
3133 | ||
ad767bed DDAG |
3134 | void migration_make_urgent_request(void) |
3135 | { | |
3136 | qemu_sem_post(&migrate_get_current()->rate_limit_sem); | |
3137 | } | |
3138 | ||
3139 | void migration_consume_urgent_request(void) | |
3140 | { | |
3141 | qemu_sem_wait(&migrate_get_current()->rate_limit_sem); | |
3142 | } | |
3143 | ||
70b20477 DDAG |
3144 | /* |
3145 | * Master migration thread on the source VM. | |
3146 | * It drives the migration and pumps the data down the outgoing channel. | |
3147 | */ | |
5f496a1b | 3148 | static void *migration_thread(void *opaque) |
0d82d0e8 | 3149 | { |
9848a404 | 3150 | MigrationState *s = opaque; |
bc72ad67 | 3151 | int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST); |
b23c2ade | 3152 | MigThrError thr_error; |
ad767bed | 3153 | bool urgent = false; |
76f5933a | 3154 | |
ab28bd23 PB |
3155 | rcu_register_thread(); |
3156 | ||
892ae715 | 3157 | object_ref(OBJECT(s)); |
b15df1ae PX |
3158 | s->iteration_start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
3159 | ||
89a02a9f | 3160 | qemu_savevm_state_header(s->to_dst_file); |
1d34e4bf | 3161 | |
62a02658 PX |
3162 | /* |
3163 | * If we opened the return path, we need to make sure dst has it | |
3164 | * opened as well. | |
3165 | */ | |
3166 | if (s->rp_state.from_dst_file) { | |
1d34e4bf | 3167 | /* Now tell the dest that it should open its end so it can reply */ |
89a02a9f | 3168 | qemu_savevm_send_open_return_path(s->to_dst_file); |
1d34e4bf DDAG |
3169 | |
3170 | /* And do a ping that will make stuff easier to debug */ | |
89a02a9f | 3171 | qemu_savevm_send_ping(s->to_dst_file, 1); |
0425dc97 | 3172 | } |
1d34e4bf | 3173 | |
58110f0a | 3174 | if (migrate_postcopy()) { |
1d34e4bf DDAG |
3175 | /* |
3176 | * Tell the destination that we *might* want to do postcopy later; | |
3177 | * if the other end can't do postcopy it should fail now, nice and | |
3178 | * early. | |
3179 | */ | |
89a02a9f | 3180 | qemu_savevm_send_postcopy_advise(s->to_dst_file); |
1d34e4bf DDAG |
3181 | } |
3182 | ||
aad555c2 ZC |
3183 | if (migrate_colo_enabled()) { |
3184 | /* Notify migration destination that we enable COLO */ | |
3185 | qemu_savevm_send_colo_enable(s->to_dst_file); | |
3186 | } | |
3187 | ||
9907e842 | 3188 | qemu_savevm_state_setup(s->to_dst_file); |
0d82d0e8 | 3189 | |
bc72ad67 | 3190 | s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start; |
48781e5b HZ |
3191 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
3192 | MIGRATION_STATUS_ACTIVE); | |
29ae8a41 | 3193 | |
9ec055ae DDAG |
3194 | trace_migration_thread_setup_complete(); |
3195 | ||
3196 | while (s->state == MIGRATION_STATUS_ACTIVE || | |
3197 | s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { | |
a3e879cd | 3198 | int64_t current_time; |
0d82d0e8 | 3199 | |
ad767bed | 3200 | if (urgent || !qemu_file_rate_limit(s->to_dst_file)) { |
2ad87305 PX |
3201 | MigIterateState iter_state = migration_iteration_run(s); |
3202 | if (iter_state == MIG_ITERATE_SKIP) { | |
3203 | continue; | |
3204 | } else if (iter_state == MIG_ITERATE_BREAK) { | |
09f6c85e | 3205 | break; |
c369f40d JQ |
3206 | } |
3207 | } | |
f4410a5d | 3208 | |
b23c2ade PX |
3209 | /* |
3210 | * Try to detect any kind of failures, and see whether we | |
3211 | * should stop the migration now. | |
3212 | */ | |
3213 | thr_error = migration_detect_error(s); | |
3214 | if (thr_error == MIG_THR_ERR_FATAL) { | |
3215 | /* Stop migration */ | |
fd45ee2c | 3216 | break; |
b23c2ade PX |
3217 | } else if (thr_error == MIG_THR_ERR_RECOVERED) { |
3218 | /* | |
3219 | * Just recovered from a e.g. network failure, reset all | |
3220 | * the local variables. This is important to avoid | |
3221 | * breaking transferred_bytes and bandwidth calculation | |
3222 | */ | |
3223 | s->iteration_start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); | |
3224 | s->iteration_initial_bytes = 0; | |
fd45ee2c | 3225 | } |
b15df1ae | 3226 | |
bc72ad67 | 3227 | current_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0d82d0e8 | 3228 | |
b15df1ae PX |
3229 | migration_update_counters(s, current_time); |
3230 | ||
ad767bed | 3231 | urgent = false; |
89a02a9f | 3232 | if (qemu_file_rate_limit(s->to_dst_file)) { |
ad767bed DDAG |
3233 | /* Wait for a delay to do rate limiting OR |
3234 | * something urgent to post the semaphore. | |
3235 | */ | |
3236 | int ms = s->iteration_start_time + BUFFER_DELAY - current_time; | |
3237 | trace_migration_thread_ratelimit_pre(ms); | |
3238 | if (qemu_sem_timedwait(&s->rate_limit_sem, ms) == 0) { | |
3239 | /* We were worken by one or more urgent things but | |
3240 | * the timedwait will have consumed one of them. | |
3241 | * The service routine for the urgent wake will dec | |
3242 | * the semaphore itself for each item it consumes, | |
3243 | * so add this one we just eat back. | |
3244 | */ | |
3245 | qemu_sem_post(&s->rate_limit_sem); | |
3246 | urgent = true; | |
3247 | } | |
3248 | trace_migration_thread_ratelimit_post(urgent); | |
0d82d0e8 | 3249 | } |
a3fa1d78 PB |
3250 | } |
3251 | ||
1d34e4bf | 3252 | trace_migration_thread_after_loop(); |
199aa6d4 | 3253 | migration_iteration_finish(s); |
892ae715 | 3254 | object_unref(OBJECT(s)); |
ab28bd23 | 3255 | rcu_unregister_thread(); |
0d82d0e8 JQ |
3256 | return NULL; |
3257 | } | |
3258 | ||
cce8040b | 3259 | void migrate_fd_connect(MigrationState *s, Error *error_in) |
0d82d0e8 | 3260 | { |
d3e35b8f PX |
3261 | int64_t rate_limit; |
3262 | bool resume = s->state == MIGRATION_STATUS_POSTCOPY_PAUSED; | |
3263 | ||
2ff30257 | 3264 | s->expected_downtime = s->parameters.downtime_limit; |
bb1fadc4 | 3265 | s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s); |
cce8040b DDAG |
3266 | if (error_in) { |
3267 | migrate_fd_error(s, error_in); | |
3268 | migrate_fd_cleanup(s); | |
3269 | return; | |
3270 | } | |
0d82d0e8 | 3271 | |
d3e35b8f PX |
3272 | if (resume) { |
3273 | /* This is a resumed migration */ | |
3274 | rate_limit = INT64_MAX; | |
3275 | } else { | |
3276 | /* This is a fresh new migration */ | |
3277 | rate_limit = s->parameters.max_bandwidth / XFER_LIMIT_RATIO; | |
442773ce | 3278 | |
d3e35b8f PX |
3279 | /* Notify before starting migration thread */ |
3280 | notifier_list_notify(&migration_state_notifiers, s); | |
3281 | } | |
3282 | ||
3283 | qemu_file_set_rate_limit(s->to_dst_file, rate_limit); | |
3284 | qemu_file_set_blocking(s->to_dst_file, true); | |
9287ac27 | 3285 | |
1d34e4bf | 3286 | /* |
c788ada8 PX |
3287 | * Open the return path. For postcopy, it is used exclusively. For |
3288 | * precopy, only if user specified "return-path" capability would | |
3289 | * QEMU uses the return path. | |
1d34e4bf | 3290 | */ |
c788ada8 | 3291 | if (migrate_postcopy_ram() || migrate_use_return_path()) { |
d3e35b8f | 3292 | if (open_return_path_on_source(s, !resume)) { |
1d34e4bf | 3293 | error_report("Unable to open return-path for postcopy"); |
d3e35b8f | 3294 | migrate_set_state(&s->state, s->state, MIGRATION_STATUS_FAILED); |
1d34e4bf DDAG |
3295 | migrate_fd_cleanup(s); |
3296 | return; | |
3297 | } | |
3298 | } | |
3299 | ||
d3e35b8f | 3300 | if (resume) { |
135b87b4 PX |
3301 | /* Wakeup the main migration thread to do the recovery */ |
3302 | migrate_set_state(&s->state, MIGRATION_STATUS_POSTCOPY_PAUSED, | |
3303 | MIGRATION_STATUS_POSTCOPY_RECOVER); | |
3304 | qemu_sem_post(&s->postcopy_pause_sem); | |
d3e35b8f PX |
3305 | return; |
3306 | } | |
3307 | ||
f986c3d2 JQ |
3308 | if (multifd_save_setup() != 0) { |
3309 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, | |
3310 | MIGRATION_STATUS_FAILED); | |
3311 | migrate_fd_cleanup(s); | |
3312 | return; | |
3313 | } | |
009fad7f | 3314 | qemu_thread_create(&s->thread, "live_migration", migration_thread, s, |
bb1fadc4 | 3315 | QEMU_THREAD_JOINABLE); |
1d34e4bf | 3316 | s->migration_thread_running = true; |
0d82d0e8 | 3317 | } |
093e3c42 | 3318 | |
9d18af93 PX |
3319 | void migration_global_dump(Monitor *mon) |
3320 | { | |
3321 | MigrationState *ms = migrate_get_current(); | |
3322 | ||
6f0f6428 JQ |
3323 | monitor_printf(mon, "globals:\n"); |
3324 | monitor_printf(mon, "store-global-state: %s\n", | |
3325 | ms->store_global_state ? "on" : "off"); | |
3326 | monitor_printf(mon, "only-migratable: %s\n", | |
3327 | ms->only_migratable ? "on" : "off"); | |
3328 | monitor_printf(mon, "send-configuration: %s\n", | |
3329 | ms->send_configuration ? "on" : "off"); | |
3330 | monitor_printf(mon, "send-section-footer: %s\n", | |
3331 | ms->send_section_footer ? "on" : "off"); | |
f548222c XG |
3332 | monitor_printf(mon, "decompress-error-check: %s\n", |
3333 | ms->decompress_error_check ? "on" : "off"); | |
9d18af93 PX |
3334 | } |
3335 | ||
20814758 PX |
3336 | #define DEFINE_PROP_MIG_CAP(name, x) \ |
3337 | DEFINE_PROP_BOOL(name, MigrationState, enabled_capabilities[x], false) | |
3338 | ||
5272298c PX |
3339 | static Property migration_properties[] = { |
3340 | DEFINE_PROP_BOOL("store-global-state", MigrationState, | |
3341 | store_global_state, true), | |
3df663e5 | 3342 | DEFINE_PROP_BOOL("only-migratable", MigrationState, only_migratable, false), |
71dd4c1a PX |
3343 | DEFINE_PROP_BOOL("send-configuration", MigrationState, |
3344 | send_configuration, true), | |
15c38503 PX |
3345 | DEFINE_PROP_BOOL("send-section-footer", MigrationState, |
3346 | send_section_footer, true), | |
f548222c XG |
3347 | DEFINE_PROP_BOOL("decompress-error-check", MigrationState, |
3348 | decompress_error_check, true), | |
89632faf PX |
3349 | |
3350 | /* Migration parameters */ | |
741d4086 | 3351 | DEFINE_PROP_UINT8("x-compress-level", MigrationState, |
89632faf PX |
3352 | parameters.compress_level, |
3353 | DEFAULT_MIGRATE_COMPRESS_LEVEL), | |
741d4086 | 3354 | DEFINE_PROP_UINT8("x-compress-threads", MigrationState, |
89632faf PX |
3355 | parameters.compress_threads, |
3356 | DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT), | |
1d58872a XG |
3357 | DEFINE_PROP_BOOL("x-compress-wait-thread", MigrationState, |
3358 | parameters.compress_wait_thread, true), | |
741d4086 | 3359 | DEFINE_PROP_UINT8("x-decompress-threads", MigrationState, |
89632faf PX |
3360 | parameters.decompress_threads, |
3361 | DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT), | |
741d4086 | 3362 | DEFINE_PROP_UINT8("x-cpu-throttle-initial", MigrationState, |
89632faf PX |
3363 | parameters.cpu_throttle_initial, |
3364 | DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL), | |
741d4086 | 3365 | DEFINE_PROP_UINT8("x-cpu-throttle-increment", MigrationState, |
89632faf PX |
3366 | parameters.cpu_throttle_increment, |
3367 | DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT), | |
741d4086 | 3368 | DEFINE_PROP_SIZE("x-max-bandwidth", MigrationState, |
89632faf | 3369 | parameters.max_bandwidth, MAX_THROTTLE), |
741d4086 | 3370 | DEFINE_PROP_UINT64("x-downtime-limit", MigrationState, |
89632faf PX |
3371 | parameters.downtime_limit, |
3372 | DEFAULT_MIGRATE_SET_DOWNTIME), | |
741d4086 | 3373 | DEFINE_PROP_UINT32("x-checkpoint-delay", MigrationState, |
89632faf PX |
3374 | parameters.x_checkpoint_delay, |
3375 | DEFAULT_MIGRATE_X_CHECKPOINT_DELAY), | |
741d4086 | 3376 | DEFINE_PROP_UINT8("x-multifd-channels", MigrationState, |
4075fb1c JQ |
3377 | parameters.x_multifd_channels, |
3378 | DEFAULT_MIGRATE_MULTIFD_CHANNELS), | |
741d4086 | 3379 | DEFINE_PROP_UINT32("x-multifd-page-count", MigrationState, |
0fb86605 JQ |
3380 | parameters.x_multifd_page_count, |
3381 | DEFAULT_MIGRATE_MULTIFD_PAGE_COUNT), | |
73af8dd8 JQ |
3382 | DEFINE_PROP_SIZE("xbzrle-cache-size", MigrationState, |
3383 | parameters.xbzrle_cache_size, | |
3384 | DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE), | |
7e555c6c DDAG |
3385 | DEFINE_PROP_SIZE("max-postcopy-bandwidth", MigrationState, |
3386 | parameters.max_postcopy_bandwidth, | |
3387 | DEFAULT_MIGRATE_MAX_POSTCOPY_BANDWIDTH), | |
4cbc9c7f LQ |
3388 | DEFINE_PROP_UINT8("max-cpu-throttle", MigrationState, |
3389 | parameters.max_cpu_throttle, | |
3390 | DEFAULT_MIGRATE_MAX_CPU_THROTTLE), | |
ee3d96ba DDAG |
3391 | DEFINE_PROP_SIZE("announce-initial", MigrationState, |
3392 | parameters.announce_initial, | |
3393 | DEFAULT_MIGRATE_ANNOUNCE_INITIAL), | |
3394 | DEFINE_PROP_SIZE("announce-max", MigrationState, | |
3395 | parameters.announce_max, | |
3396 | DEFAULT_MIGRATE_ANNOUNCE_MAX), | |
3397 | DEFINE_PROP_SIZE("announce-rounds", MigrationState, | |
3398 | parameters.announce_rounds, | |
3399 | DEFAULT_MIGRATE_ANNOUNCE_ROUNDS), | |
3400 | DEFINE_PROP_SIZE("announce-step", MigrationState, | |
3401 | parameters.announce_step, | |
3402 | DEFAULT_MIGRATE_ANNOUNCE_STEP), | |
20814758 PX |
3403 | |
3404 | /* Migration capabilities */ | |
3405 | DEFINE_PROP_MIG_CAP("x-xbzrle", MIGRATION_CAPABILITY_XBZRLE), | |
3406 | DEFINE_PROP_MIG_CAP("x-rdma-pin-all", MIGRATION_CAPABILITY_RDMA_PIN_ALL), | |
3407 | DEFINE_PROP_MIG_CAP("x-auto-converge", MIGRATION_CAPABILITY_AUTO_CONVERGE), | |
3408 | DEFINE_PROP_MIG_CAP("x-zero-blocks", MIGRATION_CAPABILITY_ZERO_BLOCKS), | |
3409 | DEFINE_PROP_MIG_CAP("x-compress", MIGRATION_CAPABILITY_COMPRESS), | |
3410 | DEFINE_PROP_MIG_CAP("x-events", MIGRATION_CAPABILITY_EVENTS), | |
3411 | DEFINE_PROP_MIG_CAP("x-postcopy-ram", MIGRATION_CAPABILITY_POSTCOPY_RAM), | |
3412 | DEFINE_PROP_MIG_CAP("x-colo", MIGRATION_CAPABILITY_X_COLO), | |
3413 | DEFINE_PROP_MIG_CAP("x-release-ram", MIGRATION_CAPABILITY_RELEASE_RAM), | |
3414 | DEFINE_PROP_MIG_CAP("x-block", MIGRATION_CAPABILITY_BLOCK), | |
3415 | DEFINE_PROP_MIG_CAP("x-return-path", MIGRATION_CAPABILITY_RETURN_PATH), | |
30126bbf | 3416 | DEFINE_PROP_MIG_CAP("x-multifd", MIGRATION_CAPABILITY_X_MULTIFD), |
20814758 | 3417 | |
5272298c PX |
3418 | DEFINE_PROP_END_OF_LIST(), |
3419 | }; | |
3420 | ||
e5cb7e76 PX |
3421 | static void migration_class_init(ObjectClass *klass, void *data) |
3422 | { | |
3423 | DeviceClass *dc = DEVICE_CLASS(klass); | |
3424 | ||
3425 | dc->user_creatable = false; | |
5272298c | 3426 | dc->props = migration_properties; |
e5cb7e76 PX |
3427 | } |
3428 | ||
b91bf5e4 MAL |
3429 | static void migration_instance_finalize(Object *obj) |
3430 | { | |
3431 | MigrationState *ms = MIGRATION_OBJ(obj); | |
3432 | MigrationParameters *params = &ms->parameters; | |
3433 | ||
87db1a7d | 3434 | qemu_mutex_destroy(&ms->error_mutex); |
62df066f | 3435 | qemu_mutex_destroy(&ms->qemu_file_lock); |
b91bf5e4 MAL |
3436 | g_free(params->tls_hostname); |
3437 | g_free(params->tls_creds); | |
ad767bed | 3438 | qemu_sem_destroy(&ms->rate_limit_sem); |
e91d8951 | 3439 | qemu_sem_destroy(&ms->pause_sem); |
b23c2ade | 3440 | qemu_sem_destroy(&ms->postcopy_pause_sem); |
14b1742e | 3441 | qemu_sem_destroy(&ms->postcopy_pause_rp_sem); |
edd090c7 | 3442 | qemu_sem_destroy(&ms->rp_state.rp_sem); |
ab105cc1 | 3443 | error_free(ms->error); |
b91bf5e4 MAL |
3444 | } |
3445 | ||
e5cb7e76 PX |
3446 | static void migration_instance_init(Object *obj) |
3447 | { | |
3448 | MigrationState *ms = MIGRATION_OBJ(obj); | |
8b0b29dc | 3449 | MigrationParameters *params = &ms->parameters; |
e5cb7e76 PX |
3450 | |
3451 | ms->state = MIGRATION_STATUS_NONE; | |
e5cb7e76 | 3452 | ms->mbps = -1; |
aecbfe9c | 3453 | ms->pages_per_second = -1; |
e91d8951 | 3454 | qemu_sem_init(&ms->pause_sem, 0); |
87db1a7d | 3455 | qemu_mutex_init(&ms->error_mutex); |
8b0b29dc PX |
3456 | |
3457 | params->tls_hostname = g_strdup(""); | |
3458 | params->tls_creds = g_strdup(""); | |
3459 | ||
3460 | /* Set has_* up only for parameter checks */ | |
3461 | params->has_compress_level = true; | |
3462 | params->has_compress_threads = true; | |
3463 | params->has_decompress_threads = true; | |
3464 | params->has_cpu_throttle_initial = true; | |
3465 | params->has_cpu_throttle_increment = true; | |
3466 | params->has_max_bandwidth = true; | |
3467 | params->has_downtime_limit = true; | |
3468 | params->has_x_checkpoint_delay = true; | |
3469 | params->has_block_incremental = true; | |
4075fb1c | 3470 | params->has_x_multifd_channels = true; |
0fb86605 | 3471 | params->has_x_multifd_page_count = true; |
73af8dd8 | 3472 | params->has_xbzrle_cache_size = true; |
7e555c6c | 3473 | params->has_max_postcopy_bandwidth = true; |
4cbc9c7f | 3474 | params->has_max_cpu_throttle = true; |
ee3d96ba DDAG |
3475 | params->has_announce_initial = true; |
3476 | params->has_announce_max = true; | |
3477 | params->has_announce_rounds = true; | |
3478 | params->has_announce_step = true; | |
b23c2ade PX |
3479 | |
3480 | qemu_sem_init(&ms->postcopy_pause_sem, 0); | |
14b1742e | 3481 | qemu_sem_init(&ms->postcopy_pause_rp_sem, 0); |
edd090c7 | 3482 | qemu_sem_init(&ms->rp_state.rp_sem, 0); |
ad767bed | 3483 | qemu_sem_init(&ms->rate_limit_sem, 0); |
62df066f | 3484 | qemu_mutex_init(&ms->qemu_file_lock); |
8b0b29dc PX |
3485 | } |
3486 | ||
3487 | /* | |
3488 | * Return true if check pass, false otherwise. Error will be put | |
3489 | * inside errp if provided. | |
3490 | */ | |
3491 | static bool migration_object_check(MigrationState *ms, Error **errp) | |
3492 | { | |
6b19a7d9 PX |
3493 | MigrationCapabilityStatusList *head = NULL; |
3494 | /* Assuming all off */ | |
3495 | bool cap_list[MIGRATION_CAPABILITY__MAX] = { 0 }, ret; | |
3496 | int i; | |
3497 | ||
8b0b29dc PX |
3498 | if (!migrate_params_check(&ms->parameters, errp)) { |
3499 | return false; | |
3500 | } | |
3501 | ||
6b19a7d9 PX |
3502 | for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { |
3503 | if (ms->enabled_capabilities[i]) { | |
3504 | head = migrate_cap_add(head, i, true); | |
3505 | } | |
3506 | } | |
3507 | ||
3508 | ret = migrate_caps_check(cap_list, head, errp); | |
3509 | ||
3510 | /* It works with head == NULL */ | |
3511 | qapi_free_MigrationCapabilityStatusList(head); | |
3512 | ||
3513 | return ret; | |
e5cb7e76 PX |
3514 | } |
3515 | ||
3516 | static const TypeInfo migration_type = { | |
3517 | .name = TYPE_MIGRATION, | |
01f6e14c | 3518 | /* |
c8d3ff38 PX |
3519 | * NOTE: TYPE_MIGRATION is not really a device, as the object is |
3520 | * not created using qdev_create(), it is not attached to the qdev | |
3521 | * device tree, and it is never realized. | |
3522 | * | |
3523 | * TODO: Make this TYPE_OBJECT once QOM provides something like | |
3524 | * TYPE_DEVICE's "-global" properties. | |
01f6e14c | 3525 | */ |
e5cb7e76 PX |
3526 | .parent = TYPE_DEVICE, |
3527 | .class_init = migration_class_init, | |
3528 | .class_size = sizeof(MigrationClass), | |
3529 | .instance_size = sizeof(MigrationState), | |
3530 | .instance_init = migration_instance_init, | |
b91bf5e4 | 3531 | .instance_finalize = migration_instance_finalize, |
e5cb7e76 PX |
3532 | }; |
3533 | ||
3534 | static void register_migration_types(void) | |
3535 | { | |
3536 | type_register_static(&migration_type); | |
3537 | } | |
3538 | ||
3539 | type_init(register_migration_types); |