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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" |
db725815 | 19 | #include "qemu/main-loop.h" |
795c40b8 | 20 | #include "migration/blocker.h" |
f4dbe1bf | 21 | #include "exec.h" |
7fcac4a2 | 22 | #include "fd.h" |
61e8b148 | 23 | #include "socket.h" |
54d31236 | 24 | #include "sysemu/runstate.h" |
46517dd4 | 25 | #include "sysemu/sysemu.h" |
e1a3ecee | 26 | #include "rdma.h" |
7b1e1a22 | 27 | #include "ram.h" |
84a899de | 28 | #include "migration/global_state.h" |
c4b63b7c | 29 | #include "migration/misc.h" |
6666c96a | 30 | #include "migration.h" |
20a519a0 | 31 | #include "savevm.h" |
40014d81 | 32 | #include "qemu-file-channel.h" |
08a0aee1 | 33 | #include "qemu-file.h" |
987772d9 | 34 | #include "migration/vmstate.h" |
737e150e | 35 | #include "block/block.h" |
e688df6b | 36 | #include "qapi/error.h" |
9aca82ba JQ |
37 | #include "qapi/clone-visitor.h" |
38 | #include "qapi/qapi-visit-sockets.h" | |
9af23989 MA |
39 | #include "qapi/qapi-commands-migration.h" |
40 | #include "qapi/qapi-events-migration.h" | |
cc7a8ea7 | 41 | #include "qapi/qmp/qerror.h" |
15280c36 | 42 | #include "qapi/qmp/qnull.h" |
ab28bd23 | 43 | #include "qemu/rcu.h" |
2c9e6fec | 44 | #include "block.h" |
be07b0ac | 45 | #include "postcopy-ram.h" |
766bd176 | 46 | #include "qemu/thread.h" |
c09e5bb1 | 47 | #include "trace.h" |
51180423 | 48 | #include "exec/target_page.h" |
61b67d47 | 49 | #include "io/channel-buffer.h" |
35a6ed4f | 50 | #include "migration/colo.h" |
4ffdb337 | 51 | #include "hw/boards.h" |
a27bd6c7 | 52 | #include "hw/qdev-properties.h" |
9d18af93 | 53 | #include "monitor/monitor.h" |
50510ea2 | 54 | #include "net/announce.h" |
065e2813 | 55 | |
dc325627 | 56 | #define MAX_THROTTLE (32 << 20) /* Migration transfer speed throttling */ |
5bb7910a | 57 | |
5b4e1eb7 JQ |
58 | /* Amount of time to allocate to each "chunk" of bandwidth-throttled |
59 | * data. */ | |
60 | #define BUFFER_DELAY 100 | |
61 | #define XFER_LIMIT_RATIO (1000 / BUFFER_DELAY) | |
62 | ||
2ff30257 AA |
63 | /* Time in milliseconds we are allowed to stop the source, |
64 | * for sending the last part */ | |
65 | #define DEFAULT_MIGRATE_SET_DOWNTIME 300 | |
66 | ||
87c9cc1c DHB |
67 | /* Maximum migrate downtime set to 2000 seconds */ |
68 | #define MAX_MIGRATE_DOWNTIME_SECONDS 2000 | |
69 | #define MAX_MIGRATE_DOWNTIME (MAX_MIGRATE_DOWNTIME_SECONDS * 1000) | |
70 | ||
8706d2d5 LL |
71 | /* Default compression thread count */ |
72 | #define DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT 8 | |
3fcb38c2 LL |
73 | /* Default decompression thread count, usually decompression is at |
74 | * least 4 times as fast as compression.*/ | |
75 | #define DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT 2 | |
8706d2d5 LL |
76 | /*0: means nocompress, 1: best speed, ... 9: best compress ratio */ |
77 | #define DEFAULT_MIGRATE_COMPRESS_LEVEL 1 | |
1626fee3 | 78 | /* Define default autoconverge cpu throttle migration parameters */ |
d85a31d1 JH |
79 | #define DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL 20 |
80 | #define DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT 10 | |
4cbc9c7f | 81 | #define DEFAULT_MIGRATE_MAX_CPU_THROTTLE 99 |
8706d2d5 | 82 | |
17ad9b35 | 83 | /* Migration XBZRLE default cache size */ |
73af8dd8 | 84 | #define DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE (64 * 1024 * 1024) |
17ad9b35 | 85 | |
131b2153 ZC |
86 | /* The delay time (in ms) between two COLO checkpoints */ |
87 | #define DEFAULT_MIGRATE_X_CHECKPOINT_DELAY (200 * 100) | |
4075fb1c | 88 | #define DEFAULT_MIGRATE_MULTIFD_CHANNELS 2 |
68b53591 | 89 | |
7e555c6c DDAG |
90 | /* Background transfer rate for postcopy, 0 means unlimited, note |
91 | * that page requests can still exceed this limit. | |
92 | */ | |
93 | #define DEFAULT_MIGRATE_MAX_POSTCOPY_BANDWIDTH 0 | |
94 | ||
ee3d96ba DDAG |
95 | /* |
96 | * Parameters for self_announce_delay giving a stream of RARP/ARP | |
97 | * packets after migration. | |
98 | */ | |
99 | #define DEFAULT_MIGRATE_ANNOUNCE_INITIAL 50 | |
100 | #define DEFAULT_MIGRATE_ANNOUNCE_MAX 550 | |
101 | #define DEFAULT_MIGRATE_ANNOUNCE_ROUNDS 5 | |
102 | #define DEFAULT_MIGRATE_ANNOUNCE_STEP 100 | |
103 | ||
99a0db9b GH |
104 | static NotifierList migration_state_notifiers = |
105 | NOTIFIER_LIST_INITIALIZER(migration_state_notifiers); | |
106 | ||
adde220a DDAG |
107 | static bool deferred_incoming; |
108 | ||
da6f1790 JQ |
109 | /* Messages sent on the return path from destination to source */ |
110 | enum mig_rp_message_type { | |
111 | MIG_RP_MSG_INVALID = 0, /* Must be 0 */ | |
112 | MIG_RP_MSG_SHUT, /* sibling will not send any more RP messages */ | |
113 | MIG_RP_MSG_PONG, /* Response to a PING; data (seq: be32 ) */ | |
114 | ||
115 | MIG_RP_MSG_REQ_PAGES_ID, /* data (start: be64, len: be32, id: string) */ | |
116 | MIG_RP_MSG_REQ_PAGES, /* data (start: be64, len: be32) */ | |
a335debb | 117 | MIG_RP_MSG_RECV_BITMAP, /* send recved_bitmap back to source */ |
13955b89 | 118 | MIG_RP_MSG_RESUME_ACK, /* tell source that we are ready to resume */ |
da6f1790 JQ |
119 | |
120 | MIG_RP_MSG_MAX | |
121 | }; | |
122 | ||
17549e84 JQ |
123 | /* When we add fault tolerance, we could have several |
124 | migrations at once. For now we don't need to add | |
125 | dynamic creation of migration */ | |
126 | ||
e5cb7e76 | 127 | static MigrationState *current_migration; |
e1b1b1bc | 128 | static MigrationIncomingState *current_incoming; |
e5cb7e76 | 129 | |
8b0b29dc | 130 | static bool migration_object_check(MigrationState *ms, Error **errp); |
0331c8ca DDAG |
131 | static int migration_maybe_pause(MigrationState *s, |
132 | int *current_active_state, | |
133 | int new_state); | |
892ae715 | 134 | static void migrate_fd_cancel(MigrationState *s); |
8b0b29dc | 135 | |
e5cb7e76 PX |
136 | void migration_object_init(void) |
137 | { | |
4ffdb337 | 138 | MachineState *ms = MACHINE(qdev_get_machine()); |
8b0b29dc | 139 | Error *err = NULL; |
4ffdb337 | 140 | |
e5cb7e76 PX |
141 | /* This can only be called once. */ |
142 | assert(!current_migration); | |
143 | current_migration = MIGRATION_OBJ(object_new(TYPE_MIGRATION)); | |
4ffdb337 | 144 | |
e1b1b1bc PX |
145 | /* |
146 | * Init the migrate incoming object as well no matter whether | |
147 | * we'll use it or not. | |
148 | */ | |
149 | assert(!current_incoming); | |
150 | current_incoming = g_new0(MigrationIncomingState, 1); | |
151 | current_incoming->state = MIGRATION_STATUS_NONE; | |
152 | current_incoming->postcopy_remote_fds = | |
153 | g_array_new(FALSE, TRUE, sizeof(struct PostCopyFD)); | |
154 | qemu_mutex_init(¤t_incoming->rp_mutex); | |
155 | qemu_event_init(¤t_incoming->main_thread_load_event, false); | |
156 | qemu_sem_init(¤t_incoming->postcopy_pause_sem_dst, 0); | |
157 | qemu_sem_init(¤t_incoming->postcopy_pause_sem_fault, 0); | |
158 | ||
159 | init_dirty_bitmap_incoming_migration(); | |
160 | ||
8b0b29dc PX |
161 | if (!migration_object_check(current_migration, &err)) { |
162 | error_report_err(err); | |
163 | exit(1); | |
164 | } | |
165 | ||
4ffdb337 PX |
166 | /* |
167 | * We cannot really do this in migration_instance_init() since at | |
168 | * that time global properties are not yet applied, then this | |
169 | * value will be definitely replaced by something else. | |
170 | */ | |
171 | if (ms->enforce_config_section) { | |
172 | current_migration->send_configuration = true; | |
173 | } | |
e5cb7e76 PX |
174 | } |
175 | ||
892ae715 | 176 | void migration_shutdown(void) |
1f895604 | 177 | { |
892ae715 DDAG |
178 | /* |
179 | * Cancel the current migration - that will (eventually) | |
180 | * stop the migration using this structure | |
181 | */ | |
182 | migrate_fd_cancel(current_migration); | |
1f895604 VSO |
183 | object_unref(OBJECT(current_migration)); |
184 | } | |
185 | ||
bca7856a | 186 | /* For outgoing */ |
859bc756 | 187 | MigrationState *migrate_get_current(void) |
17549e84 | 188 | { |
e5cb7e76 PX |
189 | /* This can only be called after the object created. */ |
190 | assert(current_migration); | |
191 | return current_migration; | |
17549e84 JQ |
192 | } |
193 | ||
bca7856a DDAG |
194 | MigrationIncomingState *migration_incoming_get_current(void) |
195 | { | |
e1b1b1bc PX |
196 | assert(current_incoming); |
197 | return current_incoming; | |
bca7856a DDAG |
198 | } |
199 | ||
200 | void migration_incoming_state_destroy(void) | |
201 | { | |
b4b076da JQ |
202 | struct MigrationIncomingState *mis = migration_incoming_get_current(); |
203 | ||
3482655b | 204 | if (mis->to_src_file) { |
660819b1 PX |
205 | /* Tell source that we are done */ |
206 | migrate_send_rp_shut(mis, qemu_file_get_error(mis->from_src_file) != 0); | |
3482655b PX |
207 | qemu_fclose(mis->to_src_file); |
208 | mis->to_src_file = NULL; | |
209 | } | |
210 | ||
660819b1 PX |
211 | if (mis->from_src_file) { |
212 | qemu_fclose(mis->from_src_file); | |
213 | mis->from_src_file = NULL; | |
214 | } | |
00fa4fc8 DDAG |
215 | if (mis->postcopy_remote_fds) { |
216 | g_array_free(mis->postcopy_remote_fds, TRUE); | |
217 | mis->postcopy_remote_fds = NULL; | |
218 | } | |
660819b1 | 219 | |
5089e186 | 220 | qemu_event_reset(&mis->main_thread_load_event); |
9aca82ba JQ |
221 | |
222 | if (mis->socket_address_list) { | |
223 | qapi_free_SocketAddressList(mis->socket_address_list); | |
224 | mis->socket_address_list = NULL; | |
225 | } | |
bca7856a DDAG |
226 | } |
227 | ||
b05dc723 JQ |
228 | static void migrate_generate_event(int new_state) |
229 | { | |
230 | if (migrate_use_events()) { | |
3ab72385 | 231 | qapi_event_send_migration(new_state); |
b05dc723 JQ |
232 | } |
233 | } | |
234 | ||
0f073f44 DDAG |
235 | static bool migrate_late_block_activate(void) |
236 | { | |
237 | MigrationState *s; | |
238 | ||
239 | s = migrate_get_current(); | |
240 | ||
241 | return s->enabled_capabilities[ | |
242 | MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE]; | |
243 | } | |
244 | ||
adde220a DDAG |
245 | /* |
246 | * Called on -incoming with a defer: uri. | |
247 | * The migration can be started later after any parameters have been | |
248 | * changed. | |
249 | */ | |
250 | static void deferred_incoming_migration(Error **errp) | |
251 | { | |
252 | if (deferred_incoming) { | |
253 | error_setg(errp, "Incoming migration already deferred"); | |
254 | } | |
255 | deferred_incoming = true; | |
256 | } | |
257 | ||
da6f1790 JQ |
258 | /* |
259 | * Send a message on the return channel back to the source | |
260 | * of the migration. | |
261 | */ | |
d6208e35 PX |
262 | static int migrate_send_rp_message(MigrationIncomingState *mis, |
263 | enum mig_rp_message_type message_type, | |
264 | uint16_t len, void *data) | |
da6f1790 | 265 | { |
d6208e35 PX |
266 | int ret = 0; |
267 | ||
da6f1790 JQ |
268 | trace_migrate_send_rp_message((int)message_type, len); |
269 | qemu_mutex_lock(&mis->rp_mutex); | |
d6208e35 PX |
270 | |
271 | /* | |
272 | * It's possible that the file handle got lost due to network | |
273 | * failures. | |
274 | */ | |
275 | if (!mis->to_src_file) { | |
276 | ret = -EIO; | |
277 | goto error; | |
278 | } | |
279 | ||
da6f1790 JQ |
280 | qemu_put_be16(mis->to_src_file, (unsigned int)message_type); |
281 | qemu_put_be16(mis->to_src_file, len); | |
282 | qemu_put_buffer(mis->to_src_file, data, len); | |
283 | qemu_fflush(mis->to_src_file); | |
d6208e35 PX |
284 | |
285 | /* It's possible that qemu file got error during sending */ | |
286 | ret = qemu_file_get_error(mis->to_src_file); | |
287 | ||
288 | error: | |
da6f1790 | 289 | qemu_mutex_unlock(&mis->rp_mutex); |
d6208e35 | 290 | return ret; |
da6f1790 JQ |
291 | } |
292 | ||
1e2d90eb DDAG |
293 | /* Request a range of pages from the source VM at the given |
294 | * start address. | |
295 | * rbname: Name of the RAMBlock to request the page in, if NULL it's the same | |
296 | * as the last request (a name must have been given previously) | |
297 | * Start: Address offset within the RB | |
298 | * Len: Length in bytes required - must be a multiple of pagesize | |
299 | */ | |
d6208e35 PX |
300 | int migrate_send_rp_req_pages(MigrationIncomingState *mis, const char *rbname, |
301 | ram_addr_t start, size_t len) | |
1e2d90eb | 302 | { |
cb8d4c8f | 303 | uint8_t bufc[12 + 1 + 255]; /* start (8), len (4), rbname up to 256 */ |
1e2d90eb | 304 | size_t msglen = 12; /* start + len */ |
d6208e35 | 305 | enum mig_rp_message_type msg_type; |
1e2d90eb DDAG |
306 | |
307 | *(uint64_t *)bufc = cpu_to_be64((uint64_t)start); | |
308 | *(uint32_t *)(bufc + 8) = cpu_to_be32((uint32_t)len); | |
309 | ||
310 | if (rbname) { | |
311 | int rbname_len = strlen(rbname); | |
312 | assert(rbname_len < 256); | |
313 | ||
314 | bufc[msglen++] = rbname_len; | |
315 | memcpy(bufc + msglen, rbname, rbname_len); | |
316 | msglen += rbname_len; | |
d6208e35 | 317 | msg_type = MIG_RP_MSG_REQ_PAGES_ID; |
1e2d90eb | 318 | } else { |
d6208e35 | 319 | msg_type = MIG_RP_MSG_REQ_PAGES; |
1e2d90eb | 320 | } |
d6208e35 PX |
321 | |
322 | return migrate_send_rp_message(mis, msg_type, msglen, bufc); | |
1e2d90eb DDAG |
323 | } |
324 | ||
aad555c2 ZC |
325 | static bool migration_colo_enabled; |
326 | bool migration_incoming_colo_enabled(void) | |
327 | { | |
328 | return migration_colo_enabled; | |
329 | } | |
330 | ||
331 | void migration_incoming_disable_colo(void) | |
332 | { | |
333 | migration_colo_enabled = false; | |
334 | } | |
335 | ||
336 | void migration_incoming_enable_colo(void) | |
337 | { | |
338 | migration_colo_enabled = true; | |
339 | } | |
340 | ||
9aca82ba JQ |
341 | void migrate_add_address(SocketAddress *address) |
342 | { | |
343 | MigrationIncomingState *mis = migration_incoming_get_current(); | |
344 | SocketAddressList *addrs; | |
345 | ||
346 | addrs = g_new0(SocketAddressList, 1); | |
347 | addrs->next = mis->socket_address_list; | |
348 | mis->socket_address_list = addrs; | |
349 | addrs->value = QAPI_CLONE(SocketAddress, address); | |
350 | } | |
351 | ||
43eaae28 | 352 | void qemu_start_incoming_migration(const char *uri, Error **errp) |
5bb7910a | 353 | { |
34c9dd8e AL |
354 | const char *p; |
355 | ||
3ab72385 | 356 | qapi_event_send_migration(MIGRATION_STATUS_SETUP); |
adde220a DDAG |
357 | if (!strcmp(uri, "defer")) { |
358 | deferred_incoming_migration(errp); | |
359 | } else if (strstart(uri, "tcp:", &p)) { | |
43eaae28 | 360 | tcp_start_incoming_migration(p, errp); |
2da776db | 361 | #ifdef CONFIG_RDMA |
adde220a | 362 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
363 | rdma_start_incoming_migration(p, errp); |
364 | #endif | |
adde220a | 365 | } else if (strstart(uri, "exec:", &p)) { |
43eaae28 | 366 | exec_start_incoming_migration(p, errp); |
adde220a | 367 | } else if (strstart(uri, "unix:", &p)) { |
43eaae28 | 368 | unix_start_incoming_migration(p, errp); |
adde220a | 369 | } else if (strstart(uri, "fd:", &p)) { |
43eaae28 | 370 | fd_start_incoming_migration(p, errp); |
adde220a | 371 | } else { |
312fd5f2 | 372 | error_setg(errp, "unknown migration protocol: %s", uri); |
8ca5e801 | 373 | } |
5bb7910a AL |
374 | } |
375 | ||
0aa6aefc DL |
376 | static void process_incoming_migration_bh(void *opaque) |
377 | { | |
378 | Error *local_err = NULL; | |
379 | MigrationIncomingState *mis = opaque; | |
380 | ||
0f073f44 DDAG |
381 | /* If capability late_block_activate is set: |
382 | * Only fire up the block code now if we're going to restart the | |
383 | * VM, else 'cont' will do it. | |
384 | * This causes file locking to happen; so we don't want it to happen | |
385 | * unless we really are starting the VM. | |
386 | */ | |
387 | if (!migrate_late_block_activate() || | |
388 | (autostart && (!global_state_received() || | |
389 | global_state_get_runstate() == RUN_STATE_RUNNING))) { | |
390 | /* Make sure all file formats flush their mutable metadata. | |
391 | * If we get an error here, just don't restart the VM yet. */ | |
392 | bdrv_invalidate_cache_all(&local_err); | |
393 | if (local_err) { | |
394 | error_report_err(local_err); | |
395 | local_err = NULL; | |
396 | autostart = false; | |
397 | } | |
d35ff5e6 KW |
398 | } |
399 | ||
0aa6aefc DL |
400 | /* |
401 | * This must happen after all error conditions are dealt with and | |
402 | * we're sure the VM is going to be running on this host. | |
403 | */ | |
7659505c | 404 | qemu_announce_self(&mis->announce_timer, migrate_announce_params()); |
0aa6aefc | 405 | |
f986c3d2 JQ |
406 | if (multifd_load_cleanup(&local_err) != 0) { |
407 | error_report_err(local_err); | |
408 | autostart = false; | |
409 | } | |
0aa6aefc DL |
410 | /* If global state section was not received or we are in running |
411 | state, we need to obey autostart. Any other state is set with | |
412 | runstate_set. */ | |
413 | ||
b35ebdf0 VSO |
414 | dirty_bitmap_mig_before_vm_start(); |
415 | ||
0aa6aefc DL |
416 | if (!global_state_received() || |
417 | global_state_get_runstate() == RUN_STATE_RUNNING) { | |
418 | if (autostart) { | |
419 | vm_start(); | |
420 | } else { | |
421 | runstate_set(RUN_STATE_PAUSED); | |
422 | } | |
db009729 ZC |
423 | } else if (migration_incoming_colo_enabled()) { |
424 | migration_incoming_disable_colo(); | |
425 | vm_start(); | |
0aa6aefc DL |
426 | } else { |
427 | runstate_set(global_state_get_runstate()); | |
428 | } | |
0aa6aefc DL |
429 | /* |
430 | * This must happen after any state changes since as soon as an external | |
431 | * observer sees this event they might start to prod at the VM assuming | |
432 | * it's ready to use. | |
433 | */ | |
434 | migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, | |
435 | MIGRATION_STATUS_COMPLETED); | |
436 | qemu_bh_delete(mis->bh); | |
437 | migration_incoming_state_destroy(); | |
438 | } | |
439 | ||
82a4da79 | 440 | static void process_incoming_migration_co(void *opaque) |
511c0231 | 441 | { |
b4b076da | 442 | MigrationIncomingState *mis = migration_incoming_get_current(); |
e9bef235 | 443 | PostcopyState ps; |
1c12e1f5 | 444 | int ret; |
8e48ac95 | 445 | Error *local_err = NULL; |
1c12e1f5 | 446 | |
4f0fae7f | 447 | assert(mis->from_src_file); |
92370989 | 448 | mis->migration_incoming_co = qemu_coroutine_self(); |
67f11b5c | 449 | mis->largest_page_size = qemu_ram_pagesize_largest(); |
093e3c42 | 450 | postcopy_state_set(POSTCOPY_INCOMING_NONE); |
93d7af6f HZ |
451 | migrate_set_state(&mis->state, MIGRATION_STATUS_NONE, |
452 | MIGRATION_STATUS_ACTIVE); | |
4f0fae7f | 453 | ret = qemu_loadvm_state(mis->from_src_file); |
bca7856a | 454 | |
e9bef235 DDAG |
455 | ps = postcopy_state_get(); |
456 | trace_process_incoming_migration_co_end(ret, ps); | |
457 | if (ps != POSTCOPY_INCOMING_NONE) { | |
458 | if (ps == POSTCOPY_INCOMING_ADVISE) { | |
459 | /* | |
460 | * Where a migration had postcopy enabled (and thus went to advise) | |
461 | * but managed to complete within the precopy period, we can use | |
462 | * the normal exit. | |
463 | */ | |
464 | postcopy_ram_incoming_cleanup(mis); | |
465 | } else if (ret >= 0) { | |
466 | /* | |
467 | * Postcopy was started, cleanup should happen at the end of the | |
468 | * postcopy thread. | |
469 | */ | |
470 | trace_process_incoming_migration_co_postcopy_end_main(); | |
471 | return; | |
472 | } | |
473 | /* Else if something went wrong then just fall out of the normal exit */ | |
474 | } | |
475 | ||
25d0c16f | 476 | /* we get COLO info, and know if we are in COLO mode */ |
aad555c2 | 477 | if (!ret && migration_incoming_colo_enabled()) { |
8e48ac95 ZC |
478 | /* Make sure all file formats flush their mutable metadata */ |
479 | bdrv_invalidate_cache_all(&local_err); | |
480 | if (local_err) { | |
8e48ac95 | 481 | error_report_err(local_err); |
6d99c2d4 | 482 | goto fail; |
8e48ac95 ZC |
483 | } |
484 | ||
13af18f2 ZC |
485 | if (colo_init_ram_cache() < 0) { |
486 | error_report("Init ram cache failed"); | |
6d99c2d4 | 487 | goto fail; |
13af18f2 ZC |
488 | } |
489 | ||
25d0c16f HZ |
490 | qemu_thread_create(&mis->colo_incoming_thread, "COLO incoming", |
491 | colo_process_incoming_thread, mis, QEMU_THREAD_JOINABLE); | |
492 | mis->have_colo_incoming_thread = true; | |
493 | qemu_coroutine_yield(); | |
494 | ||
495 | /* Wait checkpoint incoming thread exit before free resource */ | |
496 | qemu_thread_join(&mis->colo_incoming_thread); | |
13af18f2 ZC |
497 | /* We hold the global iothread lock, so it is safe here */ |
498 | colo_release_ram_cache(); | |
25d0c16f HZ |
499 | } |
500 | ||
1c12e1f5 | 501 | if (ret < 0) { |
db80face | 502 | error_report("load of migration failed: %s", strerror(-ret)); |
6d99c2d4 | 503 | goto fail; |
511c0231 | 504 | } |
0aa6aefc DL |
505 | mis->bh = qemu_bh_new(process_incoming_migration_bh, mis); |
506 | qemu_bh_schedule(mis->bh); | |
92370989 | 507 | mis->migration_incoming_co = NULL; |
6d99c2d4 FL |
508 | return; |
509 | fail: | |
510 | local_err = NULL; | |
511 | migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, | |
512 | MIGRATION_STATUS_FAILED); | |
513 | qemu_fclose(mis->from_src_file); | |
514 | if (multifd_load_cleanup(&local_err) != 0) { | |
515 | error_report_err(local_err); | |
516 | } | |
517 | exit(EXIT_FAILURE); | |
511c0231 JQ |
518 | } |
519 | ||
e595a01a | 520 | static void migration_incoming_setup(QEMUFile *f) |
82a4da79 | 521 | { |
4f0fae7f | 522 | MigrationIncomingState *mis = migration_incoming_get_current(); |
82a4da79 | 523 | |
f986c3d2 JQ |
524 | if (multifd_load_setup() != 0) { |
525 | /* We haven't been able to create multifd threads | |
526 | nothing better to do */ | |
527 | exit(EXIT_FAILURE); | |
528 | } | |
529 | ||
4f0fae7f JQ |
530 | if (!mis->from_src_file) { |
531 | mis->from_src_file = f; | |
532 | } | |
06ad5135 | 533 | qemu_file_set_blocking(f, false); |
e595a01a JQ |
534 | } |
535 | ||
36c2f8be | 536 | void migration_incoming_process(void) |
e595a01a JQ |
537 | { |
538 | Coroutine *co = qemu_coroutine_create(process_incoming_migration_co, NULL); | |
0b8b8753 | 539 | qemu_coroutine_enter(co); |
82a4da79 PB |
540 | } |
541 | ||
884835fa PX |
542 | /* Returns true if recovered from a paused migration, otherwise false */ |
543 | static bool postcopy_try_recover(QEMUFile *f) | |
e595a01a | 544 | { |
d96c9e8d PX |
545 | MigrationIncomingState *mis = migration_incoming_get_current(); |
546 | ||
547 | if (mis->state == MIGRATION_STATUS_POSTCOPY_PAUSED) { | |
548 | /* Resumed from a paused postcopy migration */ | |
549 | ||
550 | mis->from_src_file = f; | |
551 | /* Postcopy has standalone thread to do vm load */ | |
552 | qemu_file_set_blocking(f, true); | |
553 | ||
554 | /* Re-configure the return path */ | |
555 | mis->to_src_file = qemu_file_get_return_path(f); | |
556 | ||
557 | migrate_set_state(&mis->state, MIGRATION_STATUS_POSTCOPY_PAUSED, | |
558 | MIGRATION_STATUS_POSTCOPY_RECOVER); | |
559 | ||
560 | /* | |
561 | * Here, we only wake up the main loading thread (while the | |
562 | * fault thread will still be waiting), so that we can receive | |
563 | * commands from source now, and answer it if needed. The | |
564 | * fault thread will be woken up afterwards until we are sure | |
565 | * that source is ready to reply to page requests. | |
566 | */ | |
567 | qemu_sem_post(&mis->postcopy_pause_sem_dst); | |
884835fa PX |
568 | return true; |
569 | } | |
570 | ||
571 | return false; | |
572 | } | |
573 | ||
574 | void migration_fd_process_incoming(QEMUFile *f) | |
575 | { | |
576 | if (postcopy_try_recover(f)) { | |
577 | return; | |
d96c9e8d | 578 | } |
884835fa PX |
579 | |
580 | migration_incoming_setup(f); | |
581 | migration_incoming_process(); | |
e595a01a JQ |
582 | } |
583 | ||
49ed0d24 | 584 | void migration_ioc_process_incoming(QIOChannel *ioc, Error **errp) |
4f0fae7f JQ |
585 | { |
586 | MigrationIncomingState *mis = migration_incoming_get_current(); | |
a429e7f4 | 587 | bool start_migration; |
4f0fae7f JQ |
588 | |
589 | if (!mis->from_src_file) { | |
a429e7f4 | 590 | /* The first connection (multifd may have multiple) */ |
4f0fae7f | 591 | QEMUFile *f = qemu_fopen_channel_input(ioc); |
a429e7f4 PX |
592 | |
593 | /* If it's a recovery, we're done */ | |
884835fa PX |
594 | if (postcopy_try_recover(f)) { |
595 | return; | |
596 | } | |
a429e7f4 | 597 | |
36c2f8be | 598 | migration_incoming_setup(f); |
a429e7f4 PX |
599 | |
600 | /* | |
601 | * Common migration only needs one channel, so we can start | |
602 | * right now. Multifd needs more than one channel, we wait. | |
603 | */ | |
604 | start_migration = !migrate_use_multifd(); | |
605 | } else { | |
49ed0d24 | 606 | Error *local_err = NULL; |
a429e7f4 PX |
607 | /* Multiple connections */ |
608 | assert(migrate_use_multifd()); | |
49ed0d24 FL |
609 | start_migration = multifd_recv_new_channel(ioc, &local_err); |
610 | if (local_err) { | |
611 | error_propagate(errp, local_err); | |
612 | return; | |
613 | } | |
4f0fae7f | 614 | } |
81e62053 | 615 | |
a429e7f4 | 616 | if (start_migration) { |
81e62053 PX |
617 | migration_incoming_process(); |
618 | } | |
4f0fae7f JQ |
619 | } |
620 | ||
428d8908 JQ |
621 | /** |
622 | * @migration_has_all_channels: We have received all channels that we need | |
623 | * | |
624 | * Returns true when we have got connections to all the channels that | |
625 | * we need for migration. | |
626 | */ | |
627 | bool migration_has_all_channels(void) | |
628 | { | |
ca273df3 | 629 | MigrationIncomingState *mis = migration_incoming_get_current(); |
62c1e0ca JQ |
630 | bool all_channels; |
631 | ||
632 | all_channels = multifd_recv_all_channels_created(); | |
633 | ||
ca273df3 | 634 | return all_channels && mis->from_src_file != NULL; |
428d8908 JQ |
635 | } |
636 | ||
6decec93 DDAG |
637 | /* |
638 | * Send a 'SHUT' message on the return channel with the given value | |
639 | * to indicate that we've finished with the RP. Non-0 value indicates | |
640 | * error. | |
641 | */ | |
642 | void migrate_send_rp_shut(MigrationIncomingState *mis, | |
643 | uint32_t value) | |
644 | { | |
645 | uint32_t buf; | |
646 | ||
647 | buf = cpu_to_be32(value); | |
648 | migrate_send_rp_message(mis, MIG_RP_MSG_SHUT, sizeof(buf), &buf); | |
649 | } | |
650 | ||
651 | /* | |
652 | * Send a 'PONG' message on the return channel with the given value | |
653 | * (normally in response to a 'PING') | |
654 | */ | |
655 | void migrate_send_rp_pong(MigrationIncomingState *mis, | |
656 | uint32_t value) | |
657 | { | |
658 | uint32_t buf; | |
659 | ||
660 | buf = cpu_to_be32(value); | |
661 | migrate_send_rp_message(mis, MIG_RP_MSG_PONG, sizeof(buf), &buf); | |
662 | } | |
663 | ||
a335debb PX |
664 | void migrate_send_rp_recv_bitmap(MigrationIncomingState *mis, |
665 | char *block_name) | |
666 | { | |
667 | char buf[512]; | |
668 | int len; | |
669 | int64_t res; | |
670 | ||
671 | /* | |
672 | * First, we send the header part. It contains only the len of | |
673 | * idstr, and the idstr itself. | |
674 | */ | |
675 | len = strlen(block_name); | |
676 | buf[0] = len; | |
677 | memcpy(buf + 1, block_name, len); | |
678 | ||
679 | if (mis->state != MIGRATION_STATUS_POSTCOPY_RECOVER) { | |
680 | error_report("%s: MSG_RP_RECV_BITMAP only used for recovery", | |
681 | __func__); | |
682 | return; | |
683 | } | |
684 | ||
685 | migrate_send_rp_message(mis, MIG_RP_MSG_RECV_BITMAP, len + 1, buf); | |
686 | ||
687 | /* | |
688 | * Next, we dump the received bitmap to the stream. | |
689 | * | |
690 | * TODO: currently we are safe since we are the only one that is | |
691 | * using the to_src_file handle (fault thread is still paused), | |
692 | * and it's ok even not taking the mutex. However the best way is | |
693 | * to take the lock before sending the message header, and release | |
694 | * the lock after sending the bitmap. | |
695 | */ | |
696 | qemu_mutex_lock(&mis->rp_mutex); | |
697 | res = ramblock_recv_bitmap_send(mis->to_src_file, block_name); | |
698 | qemu_mutex_unlock(&mis->rp_mutex); | |
699 | ||
700 | trace_migrate_send_rp_recv_bitmap(block_name, res); | |
701 | } | |
702 | ||
13955b89 PX |
703 | void migrate_send_rp_resume_ack(MigrationIncomingState *mis, uint32_t value) |
704 | { | |
705 | uint32_t buf; | |
706 | ||
707 | buf = cpu_to_be32(value); | |
708 | migrate_send_rp_message(mis, MIG_RP_MSG_RESUME_ACK, sizeof(buf), &buf); | |
709 | } | |
710 | ||
bbf6da32 OW |
711 | MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) |
712 | { | |
713 | MigrationCapabilityStatusList *head = NULL; | |
714 | MigrationCapabilityStatusList *caps; | |
715 | MigrationState *s = migrate_get_current(); | |
716 | int i; | |
717 | ||
387eedeb | 718 | caps = NULL; /* silence compiler warning */ |
7fb1cf16 | 719 | for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { |
ed1701c6 DDAG |
720 | #ifndef CONFIG_LIVE_BLOCK_MIGRATION |
721 | if (i == MIGRATION_CAPABILITY_BLOCK) { | |
722 | continue; | |
723 | } | |
724 | #endif | |
bbf6da32 OW |
725 | if (head == NULL) { |
726 | head = g_malloc0(sizeof(*caps)); | |
727 | caps = head; | |
728 | } else { | |
729 | caps->next = g_malloc0(sizeof(*caps)); | |
730 | caps = caps->next; | |
731 | } | |
732 | caps->value = | |
733 | g_malloc(sizeof(*caps->value)); | |
734 | caps->value->capability = i; | |
735 | caps->value->state = s->enabled_capabilities[i]; | |
736 | } | |
737 | ||
738 | return head; | |
739 | } | |
740 | ||
85de8323 LL |
741 | MigrationParameters *qmp_query_migrate_parameters(Error **errp) |
742 | { | |
743 | MigrationParameters *params; | |
744 | MigrationState *s = migrate_get_current(); | |
745 | ||
e87fae4c | 746 | /* TODO use QAPI_CLONE() instead of duplicating it inline */ |
85de8323 | 747 | params = g_malloc0(sizeof(*params)); |
de63ab61 | 748 | params->has_compress_level = true; |
2594f56d | 749 | params->compress_level = s->parameters.compress_level; |
de63ab61 | 750 | params->has_compress_threads = true; |
2594f56d | 751 | params->compress_threads = s->parameters.compress_threads; |
1d58872a XG |
752 | params->has_compress_wait_thread = true; |
753 | params->compress_wait_thread = s->parameters.compress_wait_thread; | |
de63ab61 | 754 | params->has_decompress_threads = true; |
2594f56d | 755 | params->decompress_threads = s->parameters.decompress_threads; |
de63ab61 | 756 | params->has_cpu_throttle_initial = true; |
2594f56d | 757 | params->cpu_throttle_initial = s->parameters.cpu_throttle_initial; |
de63ab61 | 758 | params->has_cpu_throttle_increment = true; |
2594f56d | 759 | params->cpu_throttle_increment = s->parameters.cpu_throttle_increment; |
8cc99dcd | 760 | params->has_tls_creds = true; |
69ef1f36 | 761 | params->tls_creds = g_strdup(s->parameters.tls_creds); |
8cc99dcd | 762 | params->has_tls_hostname = true; |
69ef1f36 | 763 | params->tls_hostname = g_strdup(s->parameters.tls_hostname); |
d2f1d29b DB |
764 | params->has_tls_authz = true; |
765 | params->tls_authz = g_strdup(s->parameters.tls_authz); | |
2ff30257 AA |
766 | params->has_max_bandwidth = true; |
767 | params->max_bandwidth = s->parameters.max_bandwidth; | |
768 | params->has_downtime_limit = true; | |
769 | params->downtime_limit = s->parameters.downtime_limit; | |
fe39a4d4 | 770 | params->has_x_checkpoint_delay = true; |
68b53591 | 771 | params->x_checkpoint_delay = s->parameters.x_checkpoint_delay; |
2833c59b JQ |
772 | params->has_block_incremental = true; |
773 | params->block_incremental = s->parameters.block_incremental; | |
cbfd6c95 JQ |
774 | params->has_multifd_channels = true; |
775 | params->multifd_channels = s->parameters.multifd_channels; | |
73af8dd8 JQ |
776 | params->has_xbzrle_cache_size = true; |
777 | params->xbzrle_cache_size = s->parameters.xbzrle_cache_size; | |
7e555c6c DDAG |
778 | params->has_max_postcopy_bandwidth = true; |
779 | params->max_postcopy_bandwidth = s->parameters.max_postcopy_bandwidth; | |
4cbc9c7f LQ |
780 | params->has_max_cpu_throttle = true; |
781 | params->max_cpu_throttle = s->parameters.max_cpu_throttle; | |
ee3d96ba DDAG |
782 | params->has_announce_initial = true; |
783 | params->announce_initial = s->parameters.announce_initial; | |
784 | params->has_announce_max = true; | |
785 | params->announce_max = s->parameters.announce_max; | |
786 | params->has_announce_rounds = true; | |
787 | params->announce_rounds = s->parameters.announce_rounds; | |
788 | params->has_announce_step = true; | |
789 | params->announce_step = s->parameters.announce_step; | |
85de8323 LL |
790 | |
791 | return params; | |
792 | } | |
793 | ||
ee3d96ba DDAG |
794 | AnnounceParameters *migrate_announce_params(void) |
795 | { | |
796 | static AnnounceParameters ap; | |
797 | ||
798 | MigrationState *s = migrate_get_current(); | |
799 | ||
800 | ap.initial = s->parameters.announce_initial; | |
801 | ap.max = s->parameters.announce_max; | |
802 | ap.rounds = s->parameters.announce_rounds; | |
803 | ap.step = s->parameters.announce_step; | |
804 | ||
805 | return ≈ | |
806 | } | |
807 | ||
f6844b99 DDAG |
808 | /* |
809 | * Return true if we're already in the middle of a migration | |
810 | * (i.e. any of the active or setup states) | |
811 | */ | |
3d63da16 | 812 | bool migration_is_setup_or_active(int state) |
f6844b99 DDAG |
813 | { |
814 | switch (state) { | |
815 | case MIGRATION_STATUS_ACTIVE: | |
9ec055ae | 816 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: |
a688d2c1 | 817 | case MIGRATION_STATUS_POSTCOPY_PAUSED: |
135b87b4 | 818 | case MIGRATION_STATUS_POSTCOPY_RECOVER: |
f6844b99 | 819 | case MIGRATION_STATUS_SETUP: |
31e06077 DDAG |
820 | case MIGRATION_STATUS_PRE_SWITCHOVER: |
821 | case MIGRATION_STATUS_DEVICE: | |
f6844b99 DDAG |
822 | return true; |
823 | ||
824 | default: | |
825 | return false; | |
826 | ||
827 | } | |
828 | } | |
829 | ||
a22463a5 DDAG |
830 | static void populate_ram_info(MigrationInfo *info, MigrationState *s) |
831 | { | |
832 | info->has_ram = true; | |
833 | info->ram = g_malloc0(sizeof(*info->ram)); | |
9360447d | 834 | info->ram->transferred = ram_counters.transferred; |
a22463a5 | 835 | info->ram->total = ram_bytes_total(); |
9360447d | 836 | info->ram->duplicate = ram_counters.duplicate; |
bedf53c1 JQ |
837 | /* legacy value. It is not used anymore */ |
838 | info->ram->skipped = 0; | |
9360447d JQ |
839 | info->ram->normal = ram_counters.normal; |
840 | info->ram->normal_bytes = ram_counters.normal * | |
20afaed9 | 841 | qemu_target_page_size(); |
a22463a5 | 842 | info->ram->mbps = s->mbps; |
9360447d JQ |
843 | info->ram->dirty_sync_count = ram_counters.dirty_sync_count; |
844 | info->ram->postcopy_requests = ram_counters.postcopy_requests; | |
030ce1f8 | 845 | info->ram->page_size = qemu_target_page_size(); |
a61c45bd | 846 | info->ram->multifd_bytes = ram_counters.multifd_bytes; |
aecbfe9c | 847 | info->ram->pages_per_second = s->pages_per_second; |
a22463a5 | 848 | |
114f5aee JQ |
849 | if (migrate_use_xbzrle()) { |
850 | info->has_xbzrle_cache = true; | |
851 | info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache)); | |
852 | info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size(); | |
9360447d JQ |
853 | info->xbzrle_cache->bytes = xbzrle_counters.bytes; |
854 | info->xbzrle_cache->pages = xbzrle_counters.pages; | |
855 | info->xbzrle_cache->cache_miss = xbzrle_counters.cache_miss; | |
856 | info->xbzrle_cache->cache_miss_rate = xbzrle_counters.cache_miss_rate; | |
857 | info->xbzrle_cache->overflow = xbzrle_counters.overflow; | |
114f5aee JQ |
858 | } |
859 | ||
76e03000 XG |
860 | if (migrate_use_compression()) { |
861 | info->has_compression = true; | |
862 | info->compression = g_malloc0(sizeof(*info->compression)); | |
863 | info->compression->pages = compression_counters.pages; | |
864 | info->compression->busy = compression_counters.busy; | |
865 | info->compression->busy_rate = compression_counters.busy_rate; | |
866 | info->compression->compressed_size = | |
867 | compression_counters.compressed_size; | |
868 | info->compression->compression_rate = | |
869 | compression_counters.compression_rate; | |
870 | } | |
871 | ||
338182c8 JQ |
872 | if (cpu_throttle_active()) { |
873 | info->has_cpu_throttle_percentage = true; | |
874 | info->cpu_throttle_percentage = cpu_throttle_get_percentage(); | |
875 | } | |
876 | ||
a22463a5 DDAG |
877 | if (s->state != MIGRATION_STATUS_COMPLETED) { |
878 | info->ram->remaining = ram_bytes_remaining(); | |
9360447d | 879 | info->ram->dirty_pages_rate = ram_counters.dirty_pages_rate; |
a22463a5 DDAG |
880 | } |
881 | } | |
882 | ||
930ac04c JQ |
883 | static void populate_disk_info(MigrationInfo *info) |
884 | { | |
885 | if (blk_mig_active()) { | |
886 | info->has_disk = true; | |
887 | info->disk = g_malloc0(sizeof(*info->disk)); | |
888 | info->disk->transferred = blk_mig_bytes_transferred(); | |
889 | info->disk->remaining = blk_mig_bytes_remaining(); | |
890 | info->disk->total = blk_mig_bytes_total(); | |
891 | } | |
892 | } | |
893 | ||
65ace060 | 894 | static void fill_source_migration_info(MigrationInfo *info) |
5bb7910a | 895 | { |
17549e84 JQ |
896 | MigrationState *s = migrate_get_current(); |
897 | ||
898 | switch (s->state) { | |
31194731 | 899 | case MIGRATION_STATUS_NONE: |
17549e84 | 900 | /* no migration has happened ever */ |
65ace060 AP |
901 | /* do not overwrite destination migration status */ |
902 | return; | |
17549e84 | 903 | break; |
31194731 | 904 | case MIGRATION_STATUS_SETUP: |
29ae8a41 | 905 | info->has_status = true; |
ed4fbd10 | 906 | info->has_total_time = false; |
29ae8a41 | 907 | break; |
31194731 HZ |
908 | case MIGRATION_STATUS_ACTIVE: |
909 | case MIGRATION_STATUS_CANCELLING: | |
9ec055ae | 910 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: |
31e06077 DDAG |
911 | case MIGRATION_STATUS_PRE_SWITCHOVER: |
912 | case MIGRATION_STATUS_DEVICE: | |
a688d2c1 | 913 | case MIGRATION_STATUS_POSTCOPY_PAUSED: |
135b87b4 | 914 | case MIGRATION_STATUS_POSTCOPY_RECOVER: |
c8f9f4f4 | 915 | /* TODO add some postcopy stats */ |
9ec055ae DDAG |
916 | info->has_status = true; |
917 | info->has_total_time = true; | |
918 | info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) | |
4af246a3 | 919 | - s->start_time; |
9ec055ae DDAG |
920 | info->has_expected_downtime = true; |
921 | info->expected_downtime = s->expected_downtime; | |
922 | info->has_setup_time = true; | |
923 | info->setup_time = s->setup_time; | |
924 | ||
a22463a5 | 925 | populate_ram_info(info, s); |
930ac04c | 926 | populate_disk_info(info); |
17549e84 | 927 | break; |
0b827d5e HZ |
928 | case MIGRATION_STATUS_COLO: |
929 | info->has_status = true; | |
930 | /* TODO: display COLO specific information (checkpoint info etc.) */ | |
931 | break; | |
31194731 | 932 | case MIGRATION_STATUS_COMPLETED: |
791e7c82 | 933 | info->has_status = true; |
00c14997 | 934 | info->has_total_time = true; |
7aa939af | 935 | info->total_time = s->total_time; |
9c5a9fcf JQ |
936 | info->has_downtime = true; |
937 | info->downtime = s->downtime; | |
ed4fbd10 MH |
938 | info->has_setup_time = true; |
939 | info->setup_time = s->setup_time; | |
d5f8a570 | 940 | |
a22463a5 | 941 | populate_ram_info(info, s); |
17549e84 | 942 | break; |
31194731 | 943 | case MIGRATION_STATUS_FAILED: |
791e7c82 | 944 | info->has_status = true; |
d59ce6f3 DB |
945 | if (s->error) { |
946 | info->has_error_desc = true; | |
947 | info->error_desc = g_strdup(error_get_pretty(s->error)); | |
948 | } | |
17549e84 | 949 | break; |
31194731 | 950 | case MIGRATION_STATUS_CANCELLED: |
791e7c82 | 951 | info->has_status = true; |
17549e84 | 952 | break; |
5bb7910a | 953 | } |
cde63fbe | 954 | info->status = s->state; |
5bb7910a AL |
955 | } |
956 | ||
4a84214e PX |
957 | /** |
958 | * @migration_caps_check - check capability validity | |
959 | * | |
960 | * @cap_list: old capability list, array of bool | |
961 | * @params: new capabilities to be applied soon | |
962 | * @errp: set *errp if the check failed, with reason | |
963 | * | |
964 | * Returns true if check passed, otherwise false. | |
965 | */ | |
966 | static bool migrate_caps_check(bool *cap_list, | |
967 | MigrationCapabilityStatusList *params, | |
968 | Error **errp) | |
00458433 | 969 | { |
00458433 | 970 | MigrationCapabilityStatusList *cap; |
4a84214e | 971 | bool old_postcopy_cap; |
d7651f15 | 972 | MigrationIncomingState *mis = migration_incoming_get_current(); |
00458433 | 973 | |
4a84214e | 974 | old_postcopy_cap = cap_list[MIGRATION_CAPABILITY_POSTCOPY_RAM]; |
00458433 OW |
975 | |
976 | for (cap = params; cap; cap = cap->next) { | |
4a84214e PX |
977 | cap_list[cap->value->capability] = cap->value->state; |
978 | } | |
979 | ||
ed1701c6 | 980 | #ifndef CONFIG_LIVE_BLOCK_MIGRATION |
4a84214e PX |
981 | if (cap_list[MIGRATION_CAPABILITY_BLOCK]) { |
982 | error_setg(errp, "QEMU compiled without old-style (blk/-b, inc/-i) " | |
983 | "block migration"); | |
984 | error_append_hint(errp, "Use drive_mirror+NBD instead.\n"); | |
985 | return false; | |
00458433 | 986 | } |
4a84214e | 987 | #endif |
53dd370c | 988 | |
7e934f5b ZC |
989 | #ifndef CONFIG_REPLICATION |
990 | if (cap_list[MIGRATION_CAPABILITY_X_COLO]) { | |
991 | error_setg(errp, "QEMU compiled without replication module" | |
992 | " can't enable COLO"); | |
993 | error_append_hint(errp, "Please enable replication before COLO.\n"); | |
994 | return false; | |
995 | } | |
996 | #endif | |
997 | ||
4a84214e PX |
998 | if (cap_list[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { |
999 | if (cap_list[MIGRATION_CAPABILITY_COMPRESS]) { | |
53dd370c DDAG |
1000 | /* The decompression threads asynchronously write into RAM |
1001 | * rather than use the atomic copies needed to avoid | |
1002 | * userfaulting. It should be possible to fix the decompression | |
1003 | * threads for compatibility in future. | |
1004 | */ | |
4a84214e PX |
1005 | error_setg(errp, "Postcopy is not currently compatible " |
1006 | "with compression"); | |
1007 | return false; | |
53dd370c | 1008 | } |
4a84214e | 1009 | |
096631bd DDAG |
1010 | /* This check is reasonably expensive, so only when it's being |
1011 | * set the first time, also it's only the destination that needs | |
1012 | * special support. | |
1013 | */ | |
1014 | if (!old_postcopy_cap && runstate_check(RUN_STATE_INMIGRATE) && | |
d7651f15 | 1015 | !postcopy_ram_supported_by_host(mis)) { |
096631bd DDAG |
1016 | /* postcopy_ram_supported_by_host will have emitted a more |
1017 | * detailed message | |
1018 | */ | |
4a84214e PX |
1019 | error_setg(errp, "Postcopy is not supported"); |
1020 | return false; | |
096631bd | 1021 | } |
18269069 YK |
1022 | |
1023 | if (cap_list[MIGRATION_CAPABILITY_X_IGNORE_SHARED]) { | |
1024 | error_setg(errp, "Postcopy is not compatible with ignore-shared"); | |
1025 | return false; | |
1026 | } | |
53dd370c | 1027 | } |
4a84214e PX |
1028 | |
1029 | return true; | |
1030 | } | |
1031 | ||
65ace060 AP |
1032 | static void fill_destination_migration_info(MigrationInfo *info) |
1033 | { | |
1034 | MigrationIncomingState *mis = migration_incoming_get_current(); | |
1035 | ||
9aca82ba JQ |
1036 | if (mis->socket_address_list) { |
1037 | info->has_socket_address = true; | |
1038 | info->socket_address = | |
1039 | QAPI_CLONE(SocketAddressList, mis->socket_address_list); | |
1040 | } | |
1041 | ||
65ace060 AP |
1042 | switch (mis->state) { |
1043 | case MIGRATION_STATUS_NONE: | |
1044 | return; | |
1045 | break; | |
1046 | case MIGRATION_STATUS_SETUP: | |
1047 | case MIGRATION_STATUS_CANCELLING: | |
1048 | case MIGRATION_STATUS_CANCELLED: | |
1049 | case MIGRATION_STATUS_ACTIVE: | |
1050 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: | |
3c9928d9 PX |
1051 | case MIGRATION_STATUS_POSTCOPY_PAUSED: |
1052 | case MIGRATION_STATUS_POSTCOPY_RECOVER: | |
65ace060 AP |
1053 | case MIGRATION_STATUS_FAILED: |
1054 | case MIGRATION_STATUS_COLO: | |
1055 | info->has_status = true; | |
1056 | break; | |
1057 | case MIGRATION_STATUS_COMPLETED: | |
1058 | info->has_status = true; | |
1059 | fill_destination_postcopy_migration_info(info); | |
1060 | break; | |
1061 | } | |
1062 | info->status = mis->state; | |
1063 | } | |
1064 | ||
1065 | MigrationInfo *qmp_query_migrate(Error **errp) | |
1066 | { | |
1067 | MigrationInfo *info = g_malloc0(sizeof(*info)); | |
1068 | ||
1069 | fill_destination_migration_info(info); | |
1070 | fill_source_migration_info(info); | |
1071 | ||
1072 | return info; | |
1073 | } | |
1074 | ||
4a84214e PX |
1075 | void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, |
1076 | Error **errp) | |
1077 | { | |
1078 | MigrationState *s = migrate_get_current(); | |
1079 | MigrationCapabilityStatusList *cap; | |
dd0ee30c | 1080 | bool cap_list[MIGRATION_CAPABILITY__MAX]; |
4a84214e PX |
1081 | |
1082 | if (migration_is_setup_or_active(s->state)) { | |
1083 | error_setg(errp, QERR_MIGRATION_ACTIVE); | |
1084 | return; | |
1085 | } | |
1086 | ||
dd0ee30c PX |
1087 | memcpy(cap_list, s->enabled_capabilities, sizeof(cap_list)); |
1088 | if (!migrate_caps_check(cap_list, params, errp)) { | |
4a84214e PX |
1089 | return; |
1090 | } | |
1091 | ||
1092 | for (cap = params; cap; cap = cap->next) { | |
1093 | s->enabled_capabilities[cap->value->capability] = cap->value->state; | |
1094 | } | |
00458433 OW |
1095 | } |
1096 | ||
16d063bc PX |
1097 | /* |
1098 | * Check whether the parameters are valid. Error will be put into errp | |
1099 | * (if provided). Return true if valid, otherwise false. | |
1100 | */ | |
1101 | static bool migrate_params_check(MigrationParameters *params, Error **errp) | |
85de8323 | 1102 | { |
7f375e04 | 1103 | if (params->has_compress_level && |
741d4086 | 1104 | (params->compress_level > 9)) { |
c6bd8c70 MA |
1105 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level", |
1106 | "is invalid, it should be in the range of 0 to 9"); | |
16d063bc | 1107 | return false; |
85de8323 | 1108 | } |
16d063bc | 1109 | |
741d4086 | 1110 | if (params->has_compress_threads && (params->compress_threads < 1)) { |
c6bd8c70 MA |
1111 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
1112 | "compress_threads", | |
1113 | "is invalid, it should be in the range of 1 to 255"); | |
16d063bc | 1114 | return false; |
85de8323 | 1115 | } |
16d063bc | 1116 | |
741d4086 | 1117 | if (params->has_decompress_threads && (params->decompress_threads < 1)) { |
c6bd8c70 MA |
1118 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
1119 | "decompress_threads", | |
1120 | "is invalid, it should be in the range of 1 to 255"); | |
16d063bc | 1121 | return false; |
85de8323 | 1122 | } |
16d063bc | 1123 | |
7f375e04 EB |
1124 | if (params->has_cpu_throttle_initial && |
1125 | (params->cpu_throttle_initial < 1 || | |
1126 | params->cpu_throttle_initial > 99)) { | |
1626fee3 | 1127 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
d85a31d1 | 1128 | "cpu_throttle_initial", |
1626fee3 | 1129 | "an integer in the range of 1 to 99"); |
16d063bc | 1130 | return false; |
1626fee3 | 1131 | } |
16d063bc | 1132 | |
7f375e04 EB |
1133 | if (params->has_cpu_throttle_increment && |
1134 | (params->cpu_throttle_increment < 1 || | |
1135 | params->cpu_throttle_increment > 99)) { | |
1626fee3 | 1136 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
d85a31d1 | 1137 | "cpu_throttle_increment", |
1626fee3 | 1138 | "an integer in the range of 1 to 99"); |
16d063bc | 1139 | return false; |
1626fee3 | 1140 | } |
16d063bc | 1141 | |
741d4086 | 1142 | if (params->has_max_bandwidth && (params->max_bandwidth > SIZE_MAX)) { |
2ff30257 AA |
1143 | error_setg(errp, "Parameter 'max_bandwidth' expects an integer in the" |
1144 | " range of 0 to %zu bytes/second", SIZE_MAX); | |
16d063bc | 1145 | return false; |
2ff30257 | 1146 | } |
16d063bc | 1147 | |
2ff30257 | 1148 | if (params->has_downtime_limit && |
741d4086 | 1149 | (params->downtime_limit > MAX_MIGRATE_DOWNTIME)) { |
87c9cc1c DHB |
1150 | error_setg(errp, "Parameter 'downtime_limit' expects an integer in " |
1151 | "the range of 0 to %d milliseconds", | |
1152 | MAX_MIGRATE_DOWNTIME); | |
16d063bc | 1153 | return false; |
2ff30257 | 1154 | } |
16d063bc | 1155 | |
741d4086 JQ |
1156 | /* x_checkpoint_delay is now always positive */ |
1157 | ||
cbfd6c95 | 1158 | if (params->has_multifd_channels && (params->multifd_channels < 1)) { |
4075fb1c JQ |
1159 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
1160 | "multifd_channels", | |
1161 | "is invalid, it should be in the range of 1 to 255"); | |
1162 | return false; | |
1163 | } | |
16d063bc | 1164 | |
73af8dd8 JQ |
1165 | if (params->has_xbzrle_cache_size && |
1166 | (params->xbzrle_cache_size < qemu_target_page_size() || | |
1167 | !is_power_of_2(params->xbzrle_cache_size))) { | |
1168 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1169 | "xbzrle_cache_size", | |
1170 | "is invalid, it should be bigger than target page size" | |
1171 | " and a power of two"); | |
1172 | return false; | |
1173 | } | |
1174 | ||
4cbc9c7f LQ |
1175 | if (params->has_max_cpu_throttle && |
1176 | (params->max_cpu_throttle < params->cpu_throttle_initial || | |
1177 | params->max_cpu_throttle > 99)) { | |
1178 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1179 | "max_cpu_throttle", | |
1180 | "an integer in the range of cpu_throttle_initial to 99"); | |
1181 | return false; | |
1182 | } | |
1183 | ||
ee3d96ba DDAG |
1184 | if (params->has_announce_initial && |
1185 | params->announce_initial > 100000) { | |
1186 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1187 | "announce_initial", | |
1188 | "is invalid, it must be less than 100000 ms"); | |
1189 | return false; | |
1190 | } | |
1191 | if (params->has_announce_max && | |
1192 | params->announce_max > 100000) { | |
1193 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1194 | "announce_max", | |
1195 | "is invalid, it must be less than 100000 ms"); | |
1196 | return false; | |
1197 | } | |
1198 | if (params->has_announce_rounds && | |
1199 | params->announce_rounds > 1000) { | |
1200 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1201 | "announce_rounds", | |
1202 | "is invalid, it must be in the range of 0 to 1000"); | |
1203 | return false; | |
1204 | } | |
1205 | if (params->has_announce_step && | |
1206 | (params->announce_step < 1 || | |
1207 | params->announce_step > 10000)) { | |
1208 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1209 | "announce_step", | |
1210 | "is invalid, it must be in the range of 1 to 10000 ms"); | |
1211 | return false; | |
1212 | } | |
16d063bc PX |
1213 | return true; |
1214 | } | |
1215 | ||
1bda8b3c MA |
1216 | static void migrate_params_test_apply(MigrateSetParameters *params, |
1217 | MigrationParameters *dest) | |
1218 | { | |
1219 | *dest = migrate_get_current()->parameters; | |
1220 | ||
1221 | /* TODO use QAPI_CLONE() instead of duplicating it inline */ | |
1222 | ||
1223 | if (params->has_compress_level) { | |
1224 | dest->compress_level = params->compress_level; | |
1225 | } | |
1226 | ||
1227 | if (params->has_compress_threads) { | |
1228 | dest->compress_threads = params->compress_threads; | |
1229 | } | |
1230 | ||
1d58872a XG |
1231 | if (params->has_compress_wait_thread) { |
1232 | dest->compress_wait_thread = params->compress_wait_thread; | |
1233 | } | |
1234 | ||
1bda8b3c MA |
1235 | if (params->has_decompress_threads) { |
1236 | dest->decompress_threads = params->decompress_threads; | |
1237 | } | |
1238 | ||
1239 | if (params->has_cpu_throttle_initial) { | |
1240 | dest->cpu_throttle_initial = params->cpu_throttle_initial; | |
1241 | } | |
1242 | ||
1243 | if (params->has_cpu_throttle_increment) { | |
1244 | dest->cpu_throttle_increment = params->cpu_throttle_increment; | |
1245 | } | |
1246 | ||
1247 | if (params->has_tls_creds) { | |
01fa5598 MA |
1248 | assert(params->tls_creds->type == QTYPE_QSTRING); |
1249 | dest->tls_creds = g_strdup(params->tls_creds->u.s); | |
1bda8b3c MA |
1250 | } |
1251 | ||
1252 | if (params->has_tls_hostname) { | |
01fa5598 MA |
1253 | assert(params->tls_hostname->type == QTYPE_QSTRING); |
1254 | dest->tls_hostname = g_strdup(params->tls_hostname->u.s); | |
1bda8b3c MA |
1255 | } |
1256 | ||
1257 | if (params->has_max_bandwidth) { | |
1258 | dest->max_bandwidth = params->max_bandwidth; | |
1259 | } | |
1260 | ||
1261 | if (params->has_downtime_limit) { | |
1262 | dest->downtime_limit = params->downtime_limit; | |
1263 | } | |
1264 | ||
1265 | if (params->has_x_checkpoint_delay) { | |
1266 | dest->x_checkpoint_delay = params->x_checkpoint_delay; | |
1267 | } | |
1268 | ||
1269 | if (params->has_block_incremental) { | |
1270 | dest->block_incremental = params->block_incremental; | |
1271 | } | |
cbfd6c95 JQ |
1272 | if (params->has_multifd_channels) { |
1273 | dest->multifd_channels = params->multifd_channels; | |
5e7577a1 | 1274 | } |
73af8dd8 JQ |
1275 | if (params->has_xbzrle_cache_size) { |
1276 | dest->xbzrle_cache_size = params->xbzrle_cache_size; | |
1277 | } | |
7e555c6c DDAG |
1278 | if (params->has_max_postcopy_bandwidth) { |
1279 | dest->max_postcopy_bandwidth = params->max_postcopy_bandwidth; | |
1280 | } | |
4cbc9c7f LQ |
1281 | if (params->has_max_cpu_throttle) { |
1282 | dest->max_cpu_throttle = params->max_cpu_throttle; | |
1283 | } | |
ee3d96ba DDAG |
1284 | if (params->has_announce_initial) { |
1285 | dest->announce_initial = params->announce_initial; | |
1286 | } | |
1287 | if (params->has_announce_max) { | |
1288 | dest->announce_max = params->announce_max; | |
1289 | } | |
1290 | if (params->has_announce_rounds) { | |
1291 | dest->announce_rounds = params->announce_rounds; | |
1292 | } | |
1293 | if (params->has_announce_step) { | |
1294 | dest->announce_step = params->announce_step; | |
1295 | } | |
1bda8b3c MA |
1296 | } |
1297 | ||
73af8dd8 | 1298 | static void migrate_params_apply(MigrateSetParameters *params, Error **errp) |
16d063bc PX |
1299 | { |
1300 | MigrationState *s = migrate_get_current(); | |
1301 | ||
e87fae4c MA |
1302 | /* TODO use QAPI_CLONE() instead of duplicating it inline */ |
1303 | ||
7f375e04 EB |
1304 | if (params->has_compress_level) { |
1305 | s->parameters.compress_level = params->compress_level; | |
85de8323 | 1306 | } |
476c72aa | 1307 | |
7f375e04 EB |
1308 | if (params->has_compress_threads) { |
1309 | s->parameters.compress_threads = params->compress_threads; | |
85de8323 | 1310 | } |
476c72aa | 1311 | |
1d58872a XG |
1312 | if (params->has_compress_wait_thread) { |
1313 | s->parameters.compress_wait_thread = params->compress_wait_thread; | |
1314 | } | |
1315 | ||
7f375e04 EB |
1316 | if (params->has_decompress_threads) { |
1317 | s->parameters.decompress_threads = params->decompress_threads; | |
85de8323 | 1318 | } |
476c72aa | 1319 | |
7f375e04 EB |
1320 | if (params->has_cpu_throttle_initial) { |
1321 | s->parameters.cpu_throttle_initial = params->cpu_throttle_initial; | |
1626fee3 | 1322 | } |
476c72aa | 1323 | |
7f375e04 EB |
1324 | if (params->has_cpu_throttle_increment) { |
1325 | s->parameters.cpu_throttle_increment = params->cpu_throttle_increment; | |
1626fee3 | 1326 | } |
476c72aa | 1327 | |
7f375e04 | 1328 | if (params->has_tls_creds) { |
69ef1f36 | 1329 | g_free(s->parameters.tls_creds); |
01fa5598 MA |
1330 | assert(params->tls_creds->type == QTYPE_QSTRING); |
1331 | s->parameters.tls_creds = g_strdup(params->tls_creds->u.s); | |
69ef1f36 | 1332 | } |
476c72aa | 1333 | |
7f375e04 | 1334 | if (params->has_tls_hostname) { |
69ef1f36 | 1335 | g_free(s->parameters.tls_hostname); |
01fa5598 MA |
1336 | assert(params->tls_hostname->type == QTYPE_QSTRING); |
1337 | s->parameters.tls_hostname = g_strdup(params->tls_hostname->u.s); | |
69ef1f36 | 1338 | } |
476c72aa | 1339 | |
d2f1d29b DB |
1340 | if (params->has_tls_authz) { |
1341 | g_free(s->parameters.tls_authz); | |
1342 | assert(params->tls_authz->type == QTYPE_QSTRING); | |
1343 | s->parameters.tls_authz = g_strdup(params->tls_authz->u.s); | |
1344 | } | |
1345 | ||
2ff30257 AA |
1346 | if (params->has_max_bandwidth) { |
1347 | s->parameters.max_bandwidth = params->max_bandwidth; | |
c38c1c14 | 1348 | if (s->to_dst_file && !migration_in_postcopy()) { |
2ff30257 AA |
1349 | qemu_file_set_rate_limit(s->to_dst_file, |
1350 | s->parameters.max_bandwidth / XFER_LIMIT_RATIO); | |
1351 | } | |
1352 | } | |
476c72aa | 1353 | |
2ff30257 AA |
1354 | if (params->has_downtime_limit) { |
1355 | s->parameters.downtime_limit = params->downtime_limit; | |
1356 | } | |
68b53591 HZ |
1357 | |
1358 | if (params->has_x_checkpoint_delay) { | |
1359 | s->parameters.x_checkpoint_delay = params->x_checkpoint_delay; | |
479125d5 HZ |
1360 | if (migration_in_colo_state()) { |
1361 | colo_checkpoint_notify(s); | |
1362 | } | |
68b53591 | 1363 | } |
476c72aa | 1364 | |
2833c59b JQ |
1365 | if (params->has_block_incremental) { |
1366 | s->parameters.block_incremental = params->block_incremental; | |
1367 | } | |
cbfd6c95 JQ |
1368 | if (params->has_multifd_channels) { |
1369 | s->parameters.multifd_channels = params->multifd_channels; | |
4075fb1c | 1370 | } |
73af8dd8 JQ |
1371 | if (params->has_xbzrle_cache_size) { |
1372 | s->parameters.xbzrle_cache_size = params->xbzrle_cache_size; | |
1373 | xbzrle_cache_resize(params->xbzrle_cache_size, errp); | |
1374 | } | |
7e555c6c DDAG |
1375 | if (params->has_max_postcopy_bandwidth) { |
1376 | s->parameters.max_postcopy_bandwidth = params->max_postcopy_bandwidth; | |
c38c1c14 DDAG |
1377 | if (s->to_dst_file && migration_in_postcopy()) { |
1378 | qemu_file_set_rate_limit(s->to_dst_file, | |
1379 | s->parameters.max_postcopy_bandwidth / XFER_LIMIT_RATIO); | |
1380 | } | |
7e555c6c | 1381 | } |
4cbc9c7f LQ |
1382 | if (params->has_max_cpu_throttle) { |
1383 | s->parameters.max_cpu_throttle = params->max_cpu_throttle; | |
1384 | } | |
ee3d96ba DDAG |
1385 | if (params->has_announce_initial) { |
1386 | s->parameters.announce_initial = params->announce_initial; | |
1387 | } | |
1388 | if (params->has_announce_max) { | |
1389 | s->parameters.announce_max = params->announce_max; | |
1390 | } | |
1391 | if (params->has_announce_rounds) { | |
1392 | s->parameters.announce_rounds = params->announce_rounds; | |
1393 | } | |
1394 | if (params->has_announce_step) { | |
1395 | s->parameters.announce_step = params->announce_step; | |
1396 | } | |
85de8323 LL |
1397 | } |
1398 | ||
1bda8b3c | 1399 | void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp) |
476c72aa | 1400 | { |
1bda8b3c MA |
1401 | MigrationParameters tmp; |
1402 | ||
01fa5598 MA |
1403 | /* TODO Rewrite "" to null instead */ |
1404 | if (params->has_tls_creds | |
1405 | && params->tls_creds->type == QTYPE_QNULL) { | |
cb3e7f08 | 1406 | qobject_unref(params->tls_creds->u.n); |
01fa5598 MA |
1407 | params->tls_creds->type = QTYPE_QSTRING; |
1408 | params->tls_creds->u.s = strdup(""); | |
1409 | } | |
1410 | /* TODO Rewrite "" to null instead */ | |
1411 | if (params->has_tls_hostname | |
1412 | && params->tls_hostname->type == QTYPE_QNULL) { | |
cb3e7f08 | 1413 | qobject_unref(params->tls_hostname->u.n); |
01fa5598 MA |
1414 | params->tls_hostname->type = QTYPE_QSTRING; |
1415 | params->tls_hostname->u.s = strdup(""); | |
1416 | } | |
1417 | ||
1bda8b3c MA |
1418 | migrate_params_test_apply(params, &tmp); |
1419 | ||
1420 | if (!migrate_params_check(&tmp, errp)) { | |
476c72aa PX |
1421 | /* Invalid parameter */ |
1422 | return; | |
1423 | } | |
1424 | ||
73af8dd8 | 1425 | migrate_params_apply(params, errp); |
476c72aa PX |
1426 | } |
1427 | ||
2594f56d | 1428 | |
4886a1bc DDAG |
1429 | void qmp_migrate_start_postcopy(Error **errp) |
1430 | { | |
1431 | MigrationState *s = migrate_get_current(); | |
1432 | ||
16b0fd32 | 1433 | if (!migrate_postcopy()) { |
a54d340b | 1434 | error_setg(errp, "Enable postcopy with migrate_set_capability before" |
4886a1bc DDAG |
1435 | " the start of migration"); |
1436 | return; | |
1437 | } | |
1438 | ||
1439 | if (s->state == MIGRATION_STATUS_NONE) { | |
1440 | error_setg(errp, "Postcopy must be started after migration has been" | |
1441 | " started"); | |
1442 | return; | |
1443 | } | |
1444 | /* | |
1445 | * we don't error if migration has finished since that would be racy | |
1446 | * with issuing this command. | |
1447 | */ | |
1448 | atomic_set(&s->start_postcopy, true); | |
1449 | } | |
1450 | ||
065e2813 AL |
1451 | /* shared migration helpers */ |
1452 | ||
48781e5b | 1453 | void migrate_set_state(int *state, int old_state, int new_state) |
51cf4c1a | 1454 | { |
a31fedee | 1455 | assert(new_state < MIGRATION_STATUS__MAX); |
48781e5b | 1456 | if (atomic_cmpxchg(state, old_state, new_state) == old_state) { |
a31fedee | 1457 | trace_migrate_set_state(MigrationStatus_str(new_state)); |
b05dc723 | 1458 | migrate_generate_event(new_state); |
51cf4c1a Z |
1459 | } |
1460 | } | |
1461 | ||
4e4a3d3a PX |
1462 | static MigrationCapabilityStatusList *migrate_cap_add( |
1463 | MigrationCapabilityStatusList *list, | |
1464 | MigrationCapability index, | |
1465 | bool state) | |
2833c59b JQ |
1466 | { |
1467 | MigrationCapabilityStatusList *cap; | |
1468 | ||
1469 | cap = g_new0(MigrationCapabilityStatusList, 1); | |
1470 | cap->value = g_new0(MigrationCapabilityStatus, 1); | |
4e4a3d3a PX |
1471 | cap->value->capability = index; |
1472 | cap->value->state = state; | |
1473 | cap->next = list; | |
1474 | ||
1475 | return cap; | |
1476 | } | |
1477 | ||
1478 | void migrate_set_block_enabled(bool value, Error **errp) | |
1479 | { | |
1480 | MigrationCapabilityStatusList *cap; | |
1481 | ||
1482 | cap = migrate_cap_add(NULL, MIGRATION_CAPABILITY_BLOCK, value); | |
2833c59b JQ |
1483 | qmp_migrate_set_capabilities(cap, errp); |
1484 | qapi_free_MigrationCapabilityStatusList(cap); | |
1485 | } | |
1486 | ||
1487 | static void migrate_set_block_incremental(MigrationState *s, bool value) | |
1488 | { | |
1489 | s->parameters.block_incremental = value; | |
1490 | } | |
1491 | ||
1492 | static void block_cleanup_parameters(MigrationState *s) | |
1493 | { | |
1494 | if (s->must_remove_block_options) { | |
1495 | /* setting to false can never fail */ | |
1496 | migrate_set_block_enabled(false, &error_abort); | |
1497 | migrate_set_block_incremental(s, false); | |
1498 | s->must_remove_block_options = false; | |
1499 | } | |
1500 | } | |
1501 | ||
fd392cfa | 1502 | static void migrate_fd_cleanup(MigrationState *s) |
065e2813 | 1503 | { |
bb1fadc4 PB |
1504 | qemu_bh_delete(s->cleanup_bh); |
1505 | s->cleanup_bh = NULL; | |
1506 | ||
0ceccd85 PX |
1507 | qemu_savevm_state_cleanup(); |
1508 | ||
89a02a9f | 1509 | if (s->to_dst_file) { |
62df066f | 1510 | QEMUFile *tmp; |
f986c3d2 | 1511 | |
9013dca5 | 1512 | trace_migrate_fd_cleanup(); |
404a7c05 | 1513 | qemu_mutex_unlock_iothread(); |
1d34e4bf DDAG |
1514 | if (s->migration_thread_running) { |
1515 | qemu_thread_join(&s->thread); | |
1516 | s->migration_thread_running = false; | |
1517 | } | |
404a7c05 PB |
1518 | qemu_mutex_lock_iothread(); |
1519 | ||
1398b2e3 | 1520 | multifd_save_cleanup(); |
62df066f PX |
1521 | qemu_mutex_lock(&s->qemu_file_lock); |
1522 | tmp = s->to_dst_file; | |
89a02a9f | 1523 | s->to_dst_file = NULL; |
62df066f PX |
1524 | qemu_mutex_unlock(&s->qemu_file_lock); |
1525 | /* | |
1526 | * Close the file handle without the lock to make sure the | |
1527 | * critical section won't block for long. | |
1528 | */ | |
1529 | qemu_fclose(tmp); | |
065e2813 AL |
1530 | } |
1531 | ||
9ec055ae DDAG |
1532 | assert((s->state != MIGRATION_STATUS_ACTIVE) && |
1533 | (s->state != MIGRATION_STATUS_POSTCOPY_ACTIVE)); | |
7a2c1721 | 1534 | |
94f5a437 | 1535 | if (s->state == MIGRATION_STATUS_CANCELLING) { |
48781e5b | 1536 | migrate_set_state(&s->state, MIGRATION_STATUS_CANCELLING, |
94f5a437 | 1537 | MIGRATION_STATUS_CANCELLED); |
7a2c1721 | 1538 | } |
a3fa1d78 | 1539 | |
87db1a7d JQ |
1540 | if (s->error) { |
1541 | /* It is used on info migrate. We can't free it */ | |
1542 | error_report_err(error_copy(s->error)); | |
1543 | } | |
a3fa1d78 | 1544 | notifier_list_notify(&migration_state_notifiers, s); |
2833c59b | 1545 | block_cleanup_parameters(s); |
065e2813 AL |
1546 | } |
1547 | ||
fd392cfa YK |
1548 | static void migrate_fd_cleanup_schedule(MigrationState *s) |
1549 | { | |
1550 | /* | |
1551 | * Ref the state for bh, because it may be called when | |
1552 | * there're already no other refs | |
1553 | */ | |
1554 | object_ref(OBJECT(s)); | |
1555 | qemu_bh_schedule(s->cleanup_bh); | |
1556 | } | |
1557 | ||
1558 | static void migrate_fd_cleanup_bh(void *opaque) | |
1559 | { | |
1560 | MigrationState *s = opaque; | |
1561 | migrate_fd_cleanup(s); | |
1562 | object_unref(OBJECT(s)); | |
1563 | } | |
1564 | ||
87db1a7d JQ |
1565 | void migrate_set_error(MigrationState *s, const Error *error) |
1566 | { | |
1567 | qemu_mutex_lock(&s->error_mutex); | |
1568 | if (!s->error) { | |
1569 | s->error = error_copy(error); | |
1570 | } | |
1571 | qemu_mutex_unlock(&s->error_mutex); | |
1572 | } | |
1573 | ||
d59ce6f3 | 1574 | void migrate_fd_error(MigrationState *s, const Error *error) |
065e2813 | 1575 | { |
25174055 | 1576 | trace_migrate_fd_error(error_get_pretty(error)); |
89a02a9f | 1577 | assert(s->to_dst_file == NULL); |
48781e5b HZ |
1578 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
1579 | MIGRATION_STATUS_FAILED); | |
87db1a7d | 1580 | migrate_set_error(s, error); |
458cf28e JQ |
1581 | } |
1582 | ||
0edda1c4 | 1583 | static void migrate_fd_cancel(MigrationState *s) |
065e2813 | 1584 | { |
6f2b811a | 1585 | int old_state ; |
89a02a9f | 1586 | QEMUFile *f = migrate_get_current()->to_dst_file; |
9013dca5 | 1587 | trace_migrate_fd_cancel(); |
065e2813 | 1588 | |
70b20477 DDAG |
1589 | if (s->rp_state.from_dst_file) { |
1590 | /* shutdown the rp socket, so causing the rp thread to shutdown */ | |
1591 | qemu_file_shutdown(s->rp_state.from_dst_file); | |
1592 | } | |
1593 | ||
6f2b811a Z |
1594 | do { |
1595 | old_state = s->state; | |
f6844b99 | 1596 | if (!migration_is_setup_or_active(old_state)) { |
6f2b811a Z |
1597 | break; |
1598 | } | |
a7b36b48 DDAG |
1599 | /* If the migration is paused, kick it out of the pause */ |
1600 | if (old_state == MIGRATION_STATUS_PRE_SWITCHOVER) { | |
1601 | qemu_sem_post(&s->pause_sem); | |
1602 | } | |
48781e5b | 1603 | migrate_set_state(&s->state, old_state, MIGRATION_STATUS_CANCELLING); |
31194731 | 1604 | } while (s->state != MIGRATION_STATUS_CANCELLING); |
a26ba26e DDAG |
1605 | |
1606 | /* | |
1607 | * If we're unlucky the migration code might be stuck somewhere in a | |
1608 | * send/write while the network has failed and is waiting to timeout; | |
1609 | * if we've got shutdown(2) available then we can force it to quit. | |
1610 | * The outgoing qemu file gets closed in migrate_fd_cleanup that is | |
1611 | * called in a bh, so there is no race against this cancel. | |
1612 | */ | |
31194731 | 1613 | if (s->state == MIGRATION_STATUS_CANCELLING && f) { |
a26ba26e DDAG |
1614 | qemu_file_shutdown(f); |
1615 | } | |
1d2acc31 HZ |
1616 | if (s->state == MIGRATION_STATUS_CANCELLING && s->block_inactive) { |
1617 | Error *local_err = NULL; | |
1618 | ||
1619 | bdrv_invalidate_cache_all(&local_err); | |
1620 | if (local_err) { | |
1621 | error_report_err(local_err); | |
1622 | } else { | |
1623 | s->block_inactive = false; | |
1624 | } | |
1625 | } | |
065e2813 AL |
1626 | } |
1627 | ||
99a0db9b GH |
1628 | void add_migration_state_change_notifier(Notifier *notify) |
1629 | { | |
1630 | notifier_list_add(&migration_state_notifiers, notify); | |
1631 | } | |
1632 | ||
1633 | void remove_migration_state_change_notifier(Notifier *notify) | |
1634 | { | |
31552529 | 1635 | notifier_remove(notify); |
99a0db9b GH |
1636 | } |
1637 | ||
02edd2e7 | 1638 | bool migration_in_setup(MigrationState *s) |
afe2df69 | 1639 | { |
31194731 | 1640 | return s->state == MIGRATION_STATUS_SETUP; |
afe2df69 GH |
1641 | } |
1642 | ||
7073693b | 1643 | bool migration_has_finished(MigrationState *s) |
99a0db9b | 1644 | { |
31194731 | 1645 | return s->state == MIGRATION_STATUS_COMPLETED; |
99a0db9b | 1646 | } |
0edda1c4 | 1647 | |
afe2df69 GH |
1648 | bool migration_has_failed(MigrationState *s) |
1649 | { | |
31194731 HZ |
1650 | return (s->state == MIGRATION_STATUS_CANCELLED || |
1651 | s->state == MIGRATION_STATUS_FAILED); | |
afe2df69 GH |
1652 | } |
1653 | ||
5727309d | 1654 | bool migration_in_postcopy(void) |
9ec055ae | 1655 | { |
5727309d JQ |
1656 | MigrationState *s = migrate_get_current(); |
1657 | ||
9ec055ae DDAG |
1658 | return (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE); |
1659 | } | |
1660 | ||
b82fc321 DDAG |
1661 | bool migration_in_postcopy_after_devices(MigrationState *s) |
1662 | { | |
5727309d | 1663 | return migration_in_postcopy() && s->postcopy_after_devices; |
b82fc321 DDAG |
1664 | } |
1665 | ||
fab35005 | 1666 | bool migration_is_idle(void) |
fe44dc91 | 1667 | { |
daff7f0b MA |
1668 | MigrationState *s = current_migration; |
1669 | ||
1670 | if (!s) { | |
1671 | return true; | |
1672 | } | |
fe44dc91 AA |
1673 | |
1674 | switch (s->state) { | |
1675 | case MIGRATION_STATUS_NONE: | |
1676 | case MIGRATION_STATUS_CANCELLED: | |
1677 | case MIGRATION_STATUS_COMPLETED: | |
1678 | case MIGRATION_STATUS_FAILED: | |
1679 | return true; | |
1680 | case MIGRATION_STATUS_SETUP: | |
1681 | case MIGRATION_STATUS_CANCELLING: | |
1682 | case MIGRATION_STATUS_ACTIVE: | |
1683 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: | |
1684 | case MIGRATION_STATUS_COLO: | |
31e06077 DDAG |
1685 | case MIGRATION_STATUS_PRE_SWITCHOVER: |
1686 | case MIGRATION_STATUS_DEVICE: | |
fe44dc91 AA |
1687 | return false; |
1688 | case MIGRATION_STATUS__MAX: | |
1689 | g_assert_not_reached(); | |
1690 | } | |
1691 | ||
1692 | return false; | |
1693 | } | |
1694 | ||
3e0c8050 | 1695 | void migrate_init(MigrationState *s) |
0edda1c4 | 1696 | { |
389775d1 DDAG |
1697 | /* |
1698 | * Reinitialise all migration state, except | |
1699 | * parameters/capabilities that the user set, and | |
1700 | * locks. | |
1701 | */ | |
1702 | s->bytes_xfer = 0; | |
389775d1 | 1703 | s->cleanup_bh = 0; |
89a02a9f | 1704 | s->to_dst_file = NULL; |
389775d1 | 1705 | s->state = MIGRATION_STATUS_NONE; |
389775d1 DDAG |
1706 | s->rp_state.from_dst_file = NULL; |
1707 | s->rp_state.error = false; | |
1708 | s->mbps = 0.0; | |
aecbfe9c | 1709 | s->pages_per_second = 0.0; |
389775d1 DDAG |
1710 | s->downtime = 0; |
1711 | s->expected_downtime = 0; | |
389775d1 | 1712 | s->setup_time = 0; |
389775d1 | 1713 | s->start_postcopy = false; |
b82fc321 | 1714 | s->postcopy_after_devices = false; |
389775d1 | 1715 | s->migration_thread_running = false; |
d59ce6f3 DB |
1716 | error_free(s->error); |
1717 | s->error = NULL; | |
389775d1 | 1718 | |
48781e5b | 1719 | migrate_set_state(&s->state, MIGRATION_STATUS_NONE, MIGRATION_STATUS_SETUP); |
0edda1c4 | 1720 | |
4af246a3 PX |
1721 | s->start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
1722 | s->total_time = 0; | |
7287cbd4 | 1723 | s->vm_was_running = false; |
b15df1ae PX |
1724 | s->iteration_initial_bytes = 0; |
1725 | s->threshold_size = 0; | |
0edda1c4 | 1726 | } |
cab30143 | 1727 | |
fa2756b7 AL |
1728 | static GSList *migration_blockers; |
1729 | ||
fe44dc91 | 1730 | int migrate_add_blocker(Error *reason, Error **errp) |
fa2756b7 | 1731 | { |
811f8652 | 1732 | if (only_migratable) { |
4b576648 MA |
1733 | error_propagate_prepend(errp, error_copy(reason), |
1734 | "disallowing migration blocker " | |
b6eca81e | 1735 | "(--only-migratable) for: "); |
b67b8c3a AA |
1736 | return -EACCES; |
1737 | } | |
1738 | ||
fab35005 | 1739 | if (migration_is_idle()) { |
fe44dc91 AA |
1740 | migration_blockers = g_slist_prepend(migration_blockers, reason); |
1741 | return 0; | |
1742 | } | |
1743 | ||
4b576648 MA |
1744 | error_propagate_prepend(errp, error_copy(reason), |
1745 | "disallowing migration blocker " | |
1746 | "(migration in progress) for: "); | |
fe44dc91 | 1747 | return -EBUSY; |
fa2756b7 AL |
1748 | } |
1749 | ||
1750 | void migrate_del_blocker(Error *reason) | |
1751 | { | |
1752 | migration_blockers = g_slist_remove(migration_blockers, reason); | |
1753 | } | |
1754 | ||
bf1ae1f4 DDAG |
1755 | void qmp_migrate_incoming(const char *uri, Error **errp) |
1756 | { | |
1757 | Error *local_err = NULL; | |
4debb5f5 | 1758 | static bool once = true; |
bf1ae1f4 DDAG |
1759 | |
1760 | if (!deferred_incoming) { | |
4debb5f5 | 1761 | error_setg(errp, "For use with '-incoming defer'"); |
bf1ae1f4 DDAG |
1762 | return; |
1763 | } | |
4debb5f5 DDAG |
1764 | if (!once) { |
1765 | error_setg(errp, "The incoming migration has already been started"); | |
1766 | } | |
bf1ae1f4 DDAG |
1767 | |
1768 | qemu_start_incoming_migration(uri, &local_err); | |
1769 | ||
1770 | if (local_err) { | |
1771 | error_propagate(errp, local_err); | |
1772 | return; | |
1773 | } | |
1774 | ||
4debb5f5 | 1775 | once = false; |
bf1ae1f4 DDAG |
1776 | } |
1777 | ||
02affd41 PX |
1778 | void qmp_migrate_recover(const char *uri, Error **errp) |
1779 | { | |
1780 | MigrationIncomingState *mis = migration_incoming_get_current(); | |
1781 | ||
1782 | if (mis->state != MIGRATION_STATUS_POSTCOPY_PAUSED) { | |
1783 | error_setg(errp, "Migrate recover can only be run " | |
1784 | "when postcopy is paused."); | |
1785 | return; | |
1786 | } | |
1787 | ||
1788 | if (atomic_cmpxchg(&mis->postcopy_recover_triggered, | |
1789 | false, true) == true) { | |
1790 | error_setg(errp, "Migrate recovery is triggered already"); | |
1791 | return; | |
1792 | } | |
1793 | ||
1794 | /* | |
1795 | * Note that this call will never start a real migration; it will | |
1796 | * only re-setup the migration stream and poke existing migration | |
1797 | * to continue using that newly established channel. | |
1798 | */ | |
1799 | qemu_start_incoming_migration(uri, errp); | |
1800 | } | |
1801 | ||
bfbf89c2 PX |
1802 | void qmp_migrate_pause(Error **errp) |
1803 | { | |
1804 | MigrationState *ms = migrate_get_current(); | |
1805 | MigrationIncomingState *mis = migration_incoming_get_current(); | |
1806 | int ret; | |
1807 | ||
1808 | if (ms->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { | |
1809 | /* Source side, during postcopy */ | |
1810 | qemu_mutex_lock(&ms->qemu_file_lock); | |
1811 | ret = qemu_file_shutdown(ms->to_dst_file); | |
1812 | qemu_mutex_unlock(&ms->qemu_file_lock); | |
1813 | if (ret) { | |
1814 | error_setg(errp, "Failed to pause source migration"); | |
1815 | } | |
1816 | return; | |
1817 | } | |
1818 | ||
1819 | if (mis->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { | |
1820 | ret = qemu_file_shutdown(mis->from_src_file); | |
1821 | if (ret) { | |
1822 | error_setg(errp, "Failed to pause destination migration"); | |
1823 | } | |
1824 | return; | |
1825 | } | |
1826 | ||
1827 | error_setg(errp, "migrate-pause is currently only supported " | |
1828 | "during postcopy-active state"); | |
1829 | } | |
1830 | ||
24f3902b GK |
1831 | bool migration_is_blocked(Error **errp) |
1832 | { | |
1833 | if (qemu_savevm_state_blocked(errp)) { | |
1834 | return true; | |
1835 | } | |
1836 | ||
1837 | if (migration_blockers) { | |
250561e1 | 1838 | error_propagate(errp, error_copy(migration_blockers->data)); |
24f3902b GK |
1839 | return true; |
1840 | } | |
1841 | ||
1842 | return false; | |
1843 | } | |
1844 | ||
d3e35b8f PX |
1845 | /* Returns true if continue to migrate, or false if error detected */ |
1846 | static bool migrate_prepare(MigrationState *s, bool blk, bool blk_inc, | |
1847 | bool resume, Error **errp) | |
cab30143 | 1848 | { |
be7059cd | 1849 | Error *local_err = NULL; |
d3e35b8f PX |
1850 | |
1851 | if (resume) { | |
1852 | if (s->state != MIGRATION_STATUS_POSTCOPY_PAUSED) { | |
1853 | error_setg(errp, "Cannot resume if there is no " | |
1854 | "paused migration"); | |
1855 | return false; | |
1856 | } | |
97ca211c PX |
1857 | |
1858 | /* | |
1859 | * Postcopy recovery won't work well with release-ram | |
1860 | * capability since release-ram will drop the page buffer as | |
1861 | * long as the page is put into the send buffer. So if there | |
1862 | * is a network failure happened, any page buffers that have | |
1863 | * not yet reached the destination VM but have already been | |
1864 | * sent from the source VM will be lost forever. Let's refuse | |
1865 | * the client from resuming such a postcopy migration. | |
1866 | * Luckily release-ram was designed to only be used when src | |
1867 | * and destination VMs are on the same host, so it should be | |
1868 | * fine. | |
1869 | */ | |
1870 | if (migrate_release_ram()) { | |
1871 | error_setg(errp, "Postcopy recovery cannot work " | |
1872 | "when release-ram capability is set"); | |
1873 | return false; | |
1874 | } | |
1875 | ||
d3e35b8f PX |
1876 | /* This is a resume, skip init status */ |
1877 | return true; | |
1878 | } | |
cab30143 | 1879 | |
f6844b99 | 1880 | if (migration_is_setup_or_active(s->state) || |
0b827d5e HZ |
1881 | s->state == MIGRATION_STATUS_CANCELLING || |
1882 | s->state == MIGRATION_STATUS_COLO) { | |
c6bd8c70 | 1883 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
d3e35b8f | 1884 | return false; |
cab30143 | 1885 | } |
d3e35b8f | 1886 | |
ca99993a DDAG |
1887 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
1888 | error_setg(errp, "Guest is waiting for an incoming migration"); | |
d3e35b8f | 1889 | return false; |
ca99993a DDAG |
1890 | } |
1891 | ||
24f3902b | 1892 | if (migration_is_blocked(errp)) { |
d3e35b8f | 1893 | return false; |
fa2756b7 AL |
1894 | } |
1895 | ||
d3e35b8f | 1896 | if (blk || blk_inc) { |
2833c59b JQ |
1897 | if (migrate_use_block() || migrate_use_block_incremental()) { |
1898 | error_setg(errp, "Command options are incompatible with " | |
1899 | "current migration capabilities"); | |
d3e35b8f | 1900 | return false; |
2833c59b JQ |
1901 | } |
1902 | migrate_set_block_enabled(true, &local_err); | |
1903 | if (local_err) { | |
1904 | error_propagate(errp, local_err); | |
d3e35b8f | 1905 | return false; |
2833c59b JQ |
1906 | } |
1907 | s->must_remove_block_options = true; | |
1908 | } | |
1909 | ||
d3e35b8f | 1910 | if (blk_inc) { |
2833c59b JQ |
1911 | migrate_set_block_incremental(s, true); |
1912 | } | |
1913 | ||
3e0c8050 | 1914 | migrate_init(s); |
cab30143 | 1915 | |
d3e35b8f PX |
1916 | return true; |
1917 | } | |
1918 | ||
1919 | void qmp_migrate(const char *uri, bool has_blk, bool blk, | |
1920 | bool has_inc, bool inc, bool has_detach, bool detach, | |
1921 | bool has_resume, bool resume, Error **errp) | |
1922 | { | |
1923 | Error *local_err = NULL; | |
1924 | MigrationState *s = migrate_get_current(); | |
1925 | const char *p; | |
1926 | ||
1927 | if (!migrate_prepare(s, has_blk && blk, has_inc && inc, | |
1928 | has_resume && resume, errp)) { | |
1929 | /* Error detected, put into errp */ | |
1930 | return; | |
1931 | } | |
1932 | ||
cab30143 | 1933 | if (strstart(uri, "tcp:", &p)) { |
f37afb5a | 1934 | tcp_start_outgoing_migration(s, p, &local_err); |
2da776db | 1935 | #ifdef CONFIG_RDMA |
41310c68 | 1936 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
1937 | rdma_start_outgoing_migration(s, p, &local_err); |
1938 | #endif | |
cab30143 | 1939 | } else if (strstart(uri, "exec:", &p)) { |
f37afb5a | 1940 | exec_start_outgoing_migration(s, p, &local_err); |
cab30143 | 1941 | } else if (strstart(uri, "unix:", &p)) { |
f37afb5a | 1942 | unix_start_outgoing_migration(s, p, &local_err); |
cab30143 | 1943 | } else if (strstart(uri, "fd:", &p)) { |
f37afb5a | 1944 | fd_start_outgoing_migration(s, p, &local_err); |
99a0db9b | 1945 | } else { |
c6bd8c70 MA |
1946 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "uri", |
1947 | "a valid migration protocol"); | |
48781e5b HZ |
1948 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
1949 | MIGRATION_STATUS_FAILED); | |
09576e74 | 1950 | block_cleanup_parameters(s); |
e1c37d0e | 1951 | return; |
cab30143 JQ |
1952 | } |
1953 | ||
f37afb5a | 1954 | if (local_err) { |
d59ce6f3 | 1955 | migrate_fd_error(s, local_err); |
f37afb5a | 1956 | error_propagate(errp, local_err); |
e1c37d0e | 1957 | return; |
1299c631 | 1958 | } |
cab30143 JQ |
1959 | } |
1960 | ||
6cdedb07 | 1961 | void qmp_migrate_cancel(Error **errp) |
cab30143 | 1962 | { |
17549e84 | 1963 | migrate_fd_cancel(migrate_get_current()); |
cab30143 JQ |
1964 | } |
1965 | ||
89cfc02c DDAG |
1966 | void qmp_migrate_continue(MigrationStatus state, Error **errp) |
1967 | { | |
1968 | MigrationState *s = migrate_get_current(); | |
1969 | if (s->state != state) { | |
1970 | error_setg(errp, "Migration not in expected state: %s", | |
1971 | MigrationStatus_str(s->state)); | |
1972 | return; | |
1973 | } | |
1974 | qemu_sem_post(&s->pause_sem); | |
1975 | } | |
1976 | ||
9e1ba4cc OW |
1977 | void qmp_migrate_set_cache_size(int64_t value, Error **errp) |
1978 | { | |
73af8dd8 JQ |
1979 | MigrateSetParameters p = { |
1980 | .has_xbzrle_cache_size = true, | |
1981 | .xbzrle_cache_size = value, | |
1982 | }; | |
c91e681a | 1983 | |
73af8dd8 | 1984 | qmp_migrate_set_parameters(&p, errp); |
9e1ba4cc OW |
1985 | } |
1986 | ||
1987 | int64_t qmp_query_migrate_cache_size(Error **errp) | |
1988 | { | |
1989 | return migrate_xbzrle_cache_size(); | |
1990 | } | |
1991 | ||
3dc85383 | 1992 | void qmp_migrate_set_speed(int64_t value, Error **errp) |
cab30143 | 1993 | { |
1bda8b3c | 1994 | MigrateSetParameters p = { |
2ff30257 AA |
1995 | .has_max_bandwidth = true, |
1996 | .max_bandwidth = value, | |
1997 | }; | |
cab30143 | 1998 | |
2ff30257 | 1999 | qmp_migrate_set_parameters(&p, errp); |
cab30143 JQ |
2000 | } |
2001 | ||
4f0a993b | 2002 | void qmp_migrate_set_downtime(double value, Error **errp) |
cab30143 | 2003 | { |
87c9cc1c DHB |
2004 | if (value < 0 || value > MAX_MIGRATE_DOWNTIME_SECONDS) { |
2005 | error_setg(errp, "Parameter 'downtime_limit' expects an integer in " | |
2006 | "the range of 0 to %d seconds", | |
2007 | MAX_MIGRATE_DOWNTIME_SECONDS); | |
2008 | return; | |
2009 | } | |
2010 | ||
2ff30257 AA |
2011 | value *= 1000; /* Convert to milliseconds */ |
2012 | value = MAX(0, MIN(INT64_MAX, value)); | |
2013 | ||
1bda8b3c | 2014 | MigrateSetParameters p = { |
2ff30257 AA |
2015 | .has_downtime_limit = true, |
2016 | .downtime_limit = value, | |
2017 | }; | |
2018 | ||
2019 | qmp_migrate_set_parameters(&p, errp); | |
99a0db9b | 2020 | } |
17ad9b35 | 2021 | |
53f09a10 PB |
2022 | bool migrate_release_ram(void) |
2023 | { | |
2024 | MigrationState *s; | |
2025 | ||
2026 | s = migrate_get_current(); | |
2027 | ||
2028 | return s->enabled_capabilities[MIGRATION_CAPABILITY_RELEASE_RAM]; | |
2029 | } | |
2030 | ||
53dd370c DDAG |
2031 | bool migrate_postcopy_ram(void) |
2032 | { | |
2033 | MigrationState *s; | |
2034 | ||
2035 | s = migrate_get_current(); | |
2036 | ||
32c3db5b | 2037 | return s->enabled_capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM]; |
53dd370c DDAG |
2038 | } |
2039 | ||
58110f0a VSO |
2040 | bool migrate_postcopy(void) |
2041 | { | |
dd6bb914 | 2042 | return migrate_postcopy_ram() || migrate_dirty_bitmaps(); |
58110f0a VSO |
2043 | } |
2044 | ||
bde1e2ec CV |
2045 | bool migrate_auto_converge(void) |
2046 | { | |
2047 | MigrationState *s; | |
2048 | ||
2049 | s = migrate_get_current(); | |
2050 | ||
2051 | return s->enabled_capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; | |
2052 | } | |
2053 | ||
323004a3 PL |
2054 | bool migrate_zero_blocks(void) |
2055 | { | |
2056 | MigrationState *s; | |
2057 | ||
2058 | s = migrate_get_current(); | |
2059 | ||
2060 | return s->enabled_capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS]; | |
2061 | } | |
2062 | ||
f22f928e AP |
2063 | bool migrate_postcopy_blocktime(void) |
2064 | { | |
2065 | MigrationState *s; | |
2066 | ||
2067 | s = migrate_get_current(); | |
2068 | ||
2069 | return s->enabled_capabilities[MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME]; | |
2070 | } | |
2071 | ||
8706d2d5 LL |
2072 | bool migrate_use_compression(void) |
2073 | { | |
dde4e694 LL |
2074 | MigrationState *s; |
2075 | ||
2076 | s = migrate_get_current(); | |
2077 | ||
2078 | return s->enabled_capabilities[MIGRATION_CAPABILITY_COMPRESS]; | |
8706d2d5 LL |
2079 | } |
2080 | ||
2081 | int migrate_compress_level(void) | |
2082 | { | |
2083 | MigrationState *s; | |
2084 | ||
2085 | s = migrate_get_current(); | |
2086 | ||
2594f56d | 2087 | return s->parameters.compress_level; |
8706d2d5 LL |
2088 | } |
2089 | ||
2090 | int migrate_compress_threads(void) | |
2091 | { | |
2092 | MigrationState *s; | |
2093 | ||
2094 | s = migrate_get_current(); | |
2095 | ||
2594f56d | 2096 | return s->parameters.compress_threads; |
8706d2d5 LL |
2097 | } |
2098 | ||
1d58872a XG |
2099 | int migrate_compress_wait_thread(void) |
2100 | { | |
2101 | MigrationState *s; | |
2102 | ||
2103 | s = migrate_get_current(); | |
2104 | ||
2105 | return s->parameters.compress_wait_thread; | |
2106 | } | |
2107 | ||
3fcb38c2 LL |
2108 | int migrate_decompress_threads(void) |
2109 | { | |
2110 | MigrationState *s; | |
2111 | ||
2112 | s = migrate_get_current(); | |
2113 | ||
2594f56d | 2114 | return s->parameters.decompress_threads; |
3fcb38c2 LL |
2115 | } |
2116 | ||
55efc8c2 VSO |
2117 | bool migrate_dirty_bitmaps(void) |
2118 | { | |
2119 | MigrationState *s; | |
2120 | ||
2121 | s = migrate_get_current(); | |
2122 | ||
2123 | return s->enabled_capabilities[MIGRATION_CAPABILITY_DIRTY_BITMAPS]; | |
2124 | } | |
2125 | ||
18269069 YK |
2126 | bool migrate_ignore_shared(void) |
2127 | { | |
2128 | MigrationState *s; | |
2129 | ||
2130 | s = migrate_get_current(); | |
2131 | ||
2132 | return s->enabled_capabilities[MIGRATION_CAPABILITY_X_IGNORE_SHARED]; | |
2133 | } | |
2134 | ||
b05dc723 JQ |
2135 | bool migrate_use_events(void) |
2136 | { | |
2137 | MigrationState *s; | |
2138 | ||
2139 | s = migrate_get_current(); | |
2140 | ||
2141 | return s->enabled_capabilities[MIGRATION_CAPABILITY_EVENTS]; | |
2142 | } | |
2143 | ||
30126bbf JQ |
2144 | bool migrate_use_multifd(void) |
2145 | { | |
2146 | MigrationState *s; | |
2147 | ||
2148 | s = migrate_get_current(); | |
2149 | ||
cbfd6c95 | 2150 | return s->enabled_capabilities[MIGRATION_CAPABILITY_MULTIFD]; |
30126bbf JQ |
2151 | } |
2152 | ||
93fbd031 DDAG |
2153 | bool migrate_pause_before_switchover(void) |
2154 | { | |
2155 | MigrationState *s; | |
2156 | ||
2157 | s = migrate_get_current(); | |
2158 | ||
2159 | return s->enabled_capabilities[ | |
2160 | MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER]; | |
2161 | } | |
2162 | ||
4075fb1c JQ |
2163 | int migrate_multifd_channels(void) |
2164 | { | |
2165 | MigrationState *s; | |
2166 | ||
2167 | s = migrate_get_current(); | |
2168 | ||
cbfd6c95 | 2169 | return s->parameters.multifd_channels; |
4075fb1c JQ |
2170 | } |
2171 | ||
17ad9b35 OW |
2172 | int migrate_use_xbzrle(void) |
2173 | { | |
2174 | MigrationState *s; | |
2175 | ||
2176 | s = migrate_get_current(); | |
2177 | ||
2178 | return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE]; | |
2179 | } | |
2180 | ||
2181 | int64_t migrate_xbzrle_cache_size(void) | |
2182 | { | |
2183 | MigrationState *s; | |
2184 | ||
2185 | s = migrate_get_current(); | |
2186 | ||
73af8dd8 | 2187 | return s->parameters.xbzrle_cache_size; |
17ad9b35 | 2188 | } |
0d82d0e8 | 2189 | |
7e555c6c DDAG |
2190 | static int64_t migrate_max_postcopy_bandwidth(void) |
2191 | { | |
2192 | MigrationState *s; | |
2193 | ||
2194 | s = migrate_get_current(); | |
2195 | ||
2196 | return s->parameters.max_postcopy_bandwidth; | |
2197 | } | |
2198 | ||
2833c59b JQ |
2199 | bool migrate_use_block(void) |
2200 | { | |
2201 | MigrationState *s; | |
2202 | ||
2203 | s = migrate_get_current(); | |
2204 | ||
2205 | return s->enabled_capabilities[MIGRATION_CAPABILITY_BLOCK]; | |
2206 | } | |
2207 | ||
c788ada8 PX |
2208 | bool migrate_use_return_path(void) |
2209 | { | |
2210 | MigrationState *s; | |
2211 | ||
2212 | s = migrate_get_current(); | |
2213 | ||
2214 | return s->enabled_capabilities[MIGRATION_CAPABILITY_RETURN_PATH]; | |
2215 | } | |
2216 | ||
2833c59b JQ |
2217 | bool migrate_use_block_incremental(void) |
2218 | { | |
2219 | MigrationState *s; | |
2220 | ||
2221 | s = migrate_get_current(); | |
2222 | ||
2223 | return s->parameters.block_incremental; | |
2224 | } | |
2225 | ||
70b20477 DDAG |
2226 | /* migration thread support */ |
2227 | /* | |
2228 | * Something bad happened to the RP stream, mark an error | |
2229 | * The caller shall print or trace something to indicate why | |
2230 | */ | |
2231 | static void mark_source_rp_bad(MigrationState *s) | |
2232 | { | |
2233 | s->rp_state.error = true; | |
2234 | } | |
2235 | ||
2236 | static struct rp_cmd_args { | |
2237 | ssize_t len; /* -1 = variable */ | |
2238 | const char *name; | |
2239 | } rp_cmd_args[] = { | |
2240 | [MIG_RP_MSG_INVALID] = { .len = -1, .name = "INVALID" }, | |
2241 | [MIG_RP_MSG_SHUT] = { .len = 4, .name = "SHUT" }, | |
2242 | [MIG_RP_MSG_PONG] = { .len = 4, .name = "PONG" }, | |
1e2d90eb DDAG |
2243 | [MIG_RP_MSG_REQ_PAGES] = { .len = 12, .name = "REQ_PAGES" }, |
2244 | [MIG_RP_MSG_REQ_PAGES_ID] = { .len = -1, .name = "REQ_PAGES_ID" }, | |
a335debb | 2245 | [MIG_RP_MSG_RECV_BITMAP] = { .len = -1, .name = "RECV_BITMAP" }, |
13955b89 | 2246 | [MIG_RP_MSG_RESUME_ACK] = { .len = 4, .name = "RESUME_ACK" }, |
70b20477 DDAG |
2247 | [MIG_RP_MSG_MAX] = { .len = -1, .name = "MAX" }, |
2248 | }; | |
2249 | ||
1e2d90eb DDAG |
2250 | /* |
2251 | * Process a request for pages received on the return path, | |
2252 | * We're allowed to send more than requested (e.g. to round to our page size) | |
2253 | * and we don't need to send pages that have already been sent. | |
2254 | */ | |
2255 | static void migrate_handle_rp_req_pages(MigrationState *ms, const char* rbname, | |
2256 | ram_addr_t start, size_t len) | |
2257 | { | |
6c595cde DDAG |
2258 | long our_host_ps = getpagesize(); |
2259 | ||
1e2d90eb | 2260 | trace_migrate_handle_rp_req_pages(rbname, start, len); |
6c595cde DDAG |
2261 | |
2262 | /* | |
2263 | * Since we currently insist on matching page sizes, just sanity check | |
2264 | * we're being asked for whole host pages. | |
2265 | */ | |
2266 | if (start & (our_host_ps-1) || | |
2267 | (len & (our_host_ps-1))) { | |
2268 | error_report("%s: Misaligned page request, start: " RAM_ADDR_FMT | |
2269 | " len: %zd", __func__, start, len); | |
2270 | mark_source_rp_bad(ms); | |
2271 | return; | |
2272 | } | |
2273 | ||
96506894 | 2274 | if (ram_save_queue_pages(rbname, start, len)) { |
6c595cde DDAG |
2275 | mark_source_rp_bad(ms); |
2276 | } | |
1e2d90eb DDAG |
2277 | } |
2278 | ||
14b1742e PX |
2279 | /* Return true to retry, false to quit */ |
2280 | static bool postcopy_pause_return_path_thread(MigrationState *s) | |
2281 | { | |
2282 | trace_postcopy_pause_return_path(); | |
2283 | ||
2284 | qemu_sem_wait(&s->postcopy_pause_rp_sem); | |
2285 | ||
2286 | trace_postcopy_pause_return_path_continued(); | |
2287 | ||
2288 | return true; | |
2289 | } | |
2290 | ||
a335debb PX |
2291 | static int migrate_handle_rp_recv_bitmap(MigrationState *s, char *block_name) |
2292 | { | |
2293 | RAMBlock *block = qemu_ram_block_by_name(block_name); | |
2294 | ||
2295 | if (!block) { | |
2296 | error_report("%s: invalid block name '%s'", __func__, block_name); | |
2297 | return -EINVAL; | |
2298 | } | |
2299 | ||
2300 | /* Fetch the received bitmap and refresh the dirty bitmap */ | |
2301 | return ram_dirty_bitmap_reload(s, block); | |
2302 | } | |
2303 | ||
13955b89 PX |
2304 | static int migrate_handle_rp_resume_ack(MigrationState *s, uint32_t value) |
2305 | { | |
2306 | trace_source_return_path_thread_resume_ack(value); | |
2307 | ||
2308 | if (value != MIGRATION_RESUME_ACK_VALUE) { | |
2309 | error_report("%s: illegal resume_ack value %"PRIu32, | |
2310 | __func__, value); | |
2311 | return -1; | |
2312 | } | |
2313 | ||
2314 | /* Now both sides are active. */ | |
2315 | migrate_set_state(&s->state, MIGRATION_STATUS_POSTCOPY_RECOVER, | |
2316 | MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
2317 | ||
94190696 PX |
2318 | /* Notify send thread that time to continue send pages */ |
2319 | qemu_sem_post(&s->rp_state.rp_sem); | |
13955b89 PX |
2320 | |
2321 | return 0; | |
2322 | } | |
2323 | ||
70b20477 DDAG |
2324 | /* |
2325 | * Handles messages sent on the return path towards the source VM | |
2326 | * | |
2327 | */ | |
2328 | static void *source_return_path_thread(void *opaque) | |
2329 | { | |
2330 | MigrationState *ms = opaque; | |
2331 | QEMUFile *rp = ms->rp_state.from_dst_file; | |
2332 | uint16_t header_len, header_type; | |
568b01ca | 2333 | uint8_t buf[512]; |
70b20477 | 2334 | uint32_t tmp32, sibling_error; |
1e2d90eb DDAG |
2335 | ram_addr_t start = 0; /* =0 to silence warning */ |
2336 | size_t len = 0, expected_len; | |
70b20477 DDAG |
2337 | int res; |
2338 | ||
2339 | trace_source_return_path_thread_entry(); | |
74637e6f | 2340 | rcu_register_thread(); |
14b1742e PX |
2341 | |
2342 | retry: | |
70b20477 DDAG |
2343 | while (!ms->rp_state.error && !qemu_file_get_error(rp) && |
2344 | migration_is_setup_or_active(ms->state)) { | |
2345 | trace_source_return_path_thread_loop_top(); | |
2346 | header_type = qemu_get_be16(rp); | |
2347 | header_len = qemu_get_be16(rp); | |
2348 | ||
7a9ddfbf PX |
2349 | if (qemu_file_get_error(rp)) { |
2350 | mark_source_rp_bad(ms); | |
2351 | goto out; | |
2352 | } | |
2353 | ||
70b20477 DDAG |
2354 | if (header_type >= MIG_RP_MSG_MAX || |
2355 | header_type == MIG_RP_MSG_INVALID) { | |
2356 | error_report("RP: Received invalid message 0x%04x length 0x%04x", | |
2357 | header_type, header_len); | |
2358 | mark_source_rp_bad(ms); | |
2359 | goto out; | |
2360 | } | |
2361 | ||
2362 | if ((rp_cmd_args[header_type].len != -1 && | |
2363 | header_len != rp_cmd_args[header_type].len) || | |
568b01ca | 2364 | header_len > sizeof(buf)) { |
70b20477 DDAG |
2365 | error_report("RP: Received '%s' message (0x%04x) with" |
2366 | "incorrect length %d expecting %zu", | |
2367 | rp_cmd_args[header_type].name, header_type, header_len, | |
2368 | (size_t)rp_cmd_args[header_type].len); | |
2369 | mark_source_rp_bad(ms); | |
2370 | goto out; | |
2371 | } | |
2372 | ||
2373 | /* We know we've got a valid header by this point */ | |
2374 | res = qemu_get_buffer(rp, buf, header_len); | |
2375 | if (res != header_len) { | |
2376 | error_report("RP: Failed reading data for message 0x%04x" | |
2377 | " read %d expected %d", | |
2378 | header_type, res, header_len); | |
2379 | mark_source_rp_bad(ms); | |
2380 | goto out; | |
2381 | } | |
2382 | ||
2383 | /* OK, we have the message and the data */ | |
2384 | switch (header_type) { | |
2385 | case MIG_RP_MSG_SHUT: | |
4d885131 | 2386 | sibling_error = ldl_be_p(buf); |
70b20477 DDAG |
2387 | trace_source_return_path_thread_shut(sibling_error); |
2388 | if (sibling_error) { | |
2389 | error_report("RP: Sibling indicated error %d", sibling_error); | |
2390 | mark_source_rp_bad(ms); | |
2391 | } | |
2392 | /* | |
2393 | * We'll let the main thread deal with closing the RP | |
2394 | * we could do a shutdown(2) on it, but we're the only user | |
2395 | * anyway, so there's nothing gained. | |
2396 | */ | |
2397 | goto out; | |
2398 | ||
2399 | case MIG_RP_MSG_PONG: | |
4d885131 | 2400 | tmp32 = ldl_be_p(buf); |
70b20477 DDAG |
2401 | trace_source_return_path_thread_pong(tmp32); |
2402 | break; | |
2403 | ||
1e2d90eb | 2404 | case MIG_RP_MSG_REQ_PAGES: |
4d885131 PM |
2405 | start = ldq_be_p(buf); |
2406 | len = ldl_be_p(buf + 8); | |
1e2d90eb DDAG |
2407 | migrate_handle_rp_req_pages(ms, NULL, start, len); |
2408 | break; | |
2409 | ||
2410 | case MIG_RP_MSG_REQ_PAGES_ID: | |
2411 | expected_len = 12 + 1; /* header + termination */ | |
2412 | ||
2413 | if (header_len >= expected_len) { | |
4d885131 PM |
2414 | start = ldq_be_p(buf); |
2415 | len = ldl_be_p(buf + 8); | |
1e2d90eb DDAG |
2416 | /* Now we expect an idstr */ |
2417 | tmp32 = buf[12]; /* Length of the following idstr */ | |
2418 | buf[13 + tmp32] = '\0'; | |
2419 | expected_len += tmp32; | |
2420 | } | |
2421 | if (header_len != expected_len) { | |
2422 | error_report("RP: Req_Page_id with length %d expecting %zd", | |
2423 | header_len, expected_len); | |
2424 | mark_source_rp_bad(ms); | |
2425 | goto out; | |
2426 | } | |
2427 | migrate_handle_rp_req_pages(ms, (char *)&buf[13], start, len); | |
2428 | break; | |
2429 | ||
a335debb PX |
2430 | case MIG_RP_MSG_RECV_BITMAP: |
2431 | if (header_len < 1) { | |
2432 | error_report("%s: missing block name", __func__); | |
2433 | mark_source_rp_bad(ms); | |
2434 | goto out; | |
2435 | } | |
2436 | /* Format: len (1B) + idstr (<255B). This ends the idstr. */ | |
2437 | buf[buf[0] + 1] = '\0'; | |
2438 | if (migrate_handle_rp_recv_bitmap(ms, (char *)(buf + 1))) { | |
2439 | mark_source_rp_bad(ms); | |
2440 | goto out; | |
2441 | } | |
2442 | break; | |
2443 | ||
13955b89 PX |
2444 | case MIG_RP_MSG_RESUME_ACK: |
2445 | tmp32 = ldl_be_p(buf); | |
2446 | if (migrate_handle_rp_resume_ack(ms, tmp32)) { | |
2447 | mark_source_rp_bad(ms); | |
2448 | goto out; | |
2449 | } | |
2450 | break; | |
2451 | ||
70b20477 DDAG |
2452 | default: |
2453 | break; | |
2454 | } | |
2455 | } | |
14b1742e PX |
2456 | |
2457 | out: | |
2458 | res = qemu_file_get_error(rp); | |
2459 | if (res) { | |
2460 | if (res == -EIO) { | |
2461 | /* | |
2462 | * Maybe there is something we can do: it looks like a | |
2463 | * network down issue, and we pause for a recovery. | |
2464 | */ | |
2465 | if (postcopy_pause_return_path_thread(ms)) { | |
2466 | /* Reload rp, reset the rest */ | |
0284a2a8 MAL |
2467 | if (rp != ms->rp_state.from_dst_file) { |
2468 | qemu_fclose(rp); | |
2469 | rp = ms->rp_state.from_dst_file; | |
2470 | } | |
14b1742e PX |
2471 | ms->rp_state.error = false; |
2472 | goto retry; | |
2473 | } | |
2474 | } | |
2475 | ||
70b20477 DDAG |
2476 | trace_source_return_path_thread_bad_end(); |
2477 | mark_source_rp_bad(ms); | |
2478 | } | |
2479 | ||
2480 | trace_source_return_path_thread_end(); | |
70b20477 DDAG |
2481 | ms->rp_state.from_dst_file = NULL; |
2482 | qemu_fclose(rp); | |
74637e6f | 2483 | rcu_unregister_thread(); |
70b20477 DDAG |
2484 | return NULL; |
2485 | } | |
2486 | ||
d3e35b8f PX |
2487 | static int open_return_path_on_source(MigrationState *ms, |
2488 | bool create_thread) | |
70b20477 DDAG |
2489 | { |
2490 | ||
89a02a9f | 2491 | ms->rp_state.from_dst_file = qemu_file_get_return_path(ms->to_dst_file); |
70b20477 DDAG |
2492 | if (!ms->rp_state.from_dst_file) { |
2493 | return -1; | |
2494 | } | |
2495 | ||
2496 | trace_open_return_path_on_source(); | |
d3e35b8f PX |
2497 | |
2498 | if (!create_thread) { | |
2499 | /* We're done */ | |
2500 | return 0; | |
2501 | } | |
2502 | ||
70b20477 DDAG |
2503 | qemu_thread_create(&ms->rp_state.rp_thread, "return path", |
2504 | source_return_path_thread, ms, QEMU_THREAD_JOINABLE); | |
2505 | ||
2506 | trace_open_return_path_on_source_continue(); | |
2507 | ||
2508 | return 0; | |
2509 | } | |
2510 | ||
70b20477 DDAG |
2511 | /* Returns 0 if the RP was ok, otherwise there was an error on the RP */ |
2512 | static int await_return_path_close_on_source(MigrationState *ms) | |
2513 | { | |
2514 | /* | |
2515 | * If this is a normal exit then the destination will send a SHUT and the | |
2516 | * rp_thread will exit, however if there's an error we need to cause | |
2517 | * it to exit. | |
2518 | */ | |
89a02a9f | 2519 | if (qemu_file_get_error(ms->to_dst_file) && ms->rp_state.from_dst_file) { |
70b20477 DDAG |
2520 | /* |
2521 | * shutdown(2), if we have it, will cause it to unblock if it's stuck | |
2522 | * waiting for the destination. | |
2523 | */ | |
2524 | qemu_file_shutdown(ms->rp_state.from_dst_file); | |
2525 | mark_source_rp_bad(ms); | |
2526 | } | |
2527 | trace_await_return_path_close_on_source_joining(); | |
2528 | qemu_thread_join(&ms->rp_state.rp_thread); | |
2529 | trace_await_return_path_close_on_source_close(); | |
2530 | return ms->rp_state.error; | |
2531 | } | |
2532 | ||
1d34e4bf DDAG |
2533 | /* |
2534 | * Switch from normal iteration to postcopy | |
2535 | * Returns non-0 on error | |
2536 | */ | |
7287cbd4 | 2537 | static int postcopy_start(MigrationState *ms) |
1d34e4bf DDAG |
2538 | { |
2539 | int ret; | |
61b67d47 DB |
2540 | QIOChannelBuffer *bioc; |
2541 | QEMUFile *fb; | |
1d34e4bf | 2542 | int64_t time_at_stop = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
7e555c6c | 2543 | int64_t bandwidth = migrate_max_postcopy_bandwidth(); |
ef8d6488 | 2544 | bool restart_block = false; |
0331c8ca DDAG |
2545 | int cur_state = MIGRATION_STATUS_ACTIVE; |
2546 | if (!migrate_pause_before_switchover()) { | |
2547 | migrate_set_state(&ms->state, MIGRATION_STATUS_ACTIVE, | |
2548 | MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
2549 | } | |
1d34e4bf DDAG |
2550 | |
2551 | trace_postcopy_start(); | |
2552 | qemu_mutex_lock_iothread(); | |
2553 | trace_postcopy_start_set_run(); | |
2554 | ||
fb064112 | 2555 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); |
1d34e4bf DDAG |
2556 | global_state_store(); |
2557 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); | |
76b1c7fe KW |
2558 | if (ret < 0) { |
2559 | goto fail; | |
2560 | } | |
1d34e4bf | 2561 | |
0331c8ca DDAG |
2562 | ret = migration_maybe_pause(ms, &cur_state, |
2563 | MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
2564 | if (ret < 0) { | |
2565 | goto fail; | |
2566 | } | |
2567 | ||
76b1c7fe | 2568 | ret = bdrv_inactivate_all(); |
1d34e4bf DDAG |
2569 | if (ret < 0) { |
2570 | goto fail; | |
2571 | } | |
ef8d6488 | 2572 | restart_block = true; |
1d34e4bf | 2573 | |
1c0d249d DDAG |
2574 | /* |
2575 | * Cause any non-postcopiable, but iterative devices to | |
2576 | * send out their final data. | |
2577 | */ | |
a1fbe750 | 2578 | qemu_savevm_state_complete_precopy(ms->to_dst_file, true, false); |
1c0d249d | 2579 | |
1d34e4bf DDAG |
2580 | /* |
2581 | * in Finish migrate and with the io-lock held everything should | |
2582 | * be quiet, but we've potentially still got dirty pages and we | |
2583 | * need to tell the destination to throw any pages it's already received | |
2584 | * that are dirty | |
2585 | */ | |
58110f0a VSO |
2586 | if (migrate_postcopy_ram()) { |
2587 | if (ram_postcopy_send_discard_bitmap(ms)) { | |
2588 | error_report("postcopy send discard bitmap failed"); | |
2589 | goto fail; | |
2590 | } | |
1d34e4bf DDAG |
2591 | } |
2592 | ||
2593 | /* | |
2594 | * send rest of state - note things that are doing postcopy | |
2595 | * will notice we're in POSTCOPY_ACTIVE and not actually | |
2596 | * wrap their state up here | |
2597 | */ | |
7e555c6c DDAG |
2598 | /* 0 max-postcopy-bandwidth means unlimited */ |
2599 | if (!bandwidth) { | |
2600 | qemu_file_set_rate_limit(ms->to_dst_file, INT64_MAX); | |
2601 | } else { | |
2602 | qemu_file_set_rate_limit(ms->to_dst_file, bandwidth / XFER_LIMIT_RATIO); | |
2603 | } | |
58110f0a VSO |
2604 | if (migrate_postcopy_ram()) { |
2605 | /* Ping just for debugging, helps line traces up */ | |
2606 | qemu_savevm_send_ping(ms->to_dst_file, 2); | |
2607 | } | |
1d34e4bf DDAG |
2608 | |
2609 | /* | |
2610 | * While loading the device state we may trigger page transfer | |
2611 | * requests and the fd must be free to process those, and thus | |
2612 | * the destination must read the whole device state off the fd before | |
2613 | * it starts processing it. Unfortunately the ad-hoc migration format | |
2614 | * doesn't allow the destination to know the size to read without fully | |
2615 | * parsing it through each devices load-state code (especially the open | |
2616 | * coded devices that use get/put). | |
2617 | * So we wrap the device state up in a package with a length at the start; | |
2618 | * to do this we use a qemu_buf to hold the whole of the device state. | |
2619 | */ | |
61b67d47 | 2620 | bioc = qio_channel_buffer_new(4096); |
6f01f136 | 2621 | qio_channel_set_name(QIO_CHANNEL(bioc), "migration-postcopy-buffer"); |
61b67d47 DB |
2622 | fb = qemu_fopen_channel_output(QIO_CHANNEL(bioc)); |
2623 | object_unref(OBJECT(bioc)); | |
1d34e4bf | 2624 | |
c76201ab DDAG |
2625 | /* |
2626 | * Make sure the receiver can get incoming pages before we send the rest | |
2627 | * of the state | |
2628 | */ | |
2629 | qemu_savevm_send_postcopy_listen(fb); | |
2630 | ||
a1fbe750 | 2631 | qemu_savevm_state_complete_precopy(fb, false, false); |
58110f0a VSO |
2632 | if (migrate_postcopy_ram()) { |
2633 | qemu_savevm_send_ping(fb, 3); | |
2634 | } | |
1d34e4bf DDAG |
2635 | |
2636 | qemu_savevm_send_postcopy_run(fb); | |
2637 | ||
2638 | /* <><> end of stuff going into the package */ | |
1d34e4bf | 2639 | |
ef8d6488 DDAG |
2640 | /* Last point of recovery; as soon as we send the package the destination |
2641 | * can open devices and potentially start running. | |
2642 | * Lets just check again we've not got any errors. | |
2643 | */ | |
2644 | ret = qemu_file_get_error(ms->to_dst_file); | |
2645 | if (ret) { | |
2646 | error_report("postcopy_start: Migration stream errored (pre package)"); | |
2647 | goto fail_closefb; | |
2648 | } | |
2649 | ||
2650 | restart_block = false; | |
2651 | ||
1d34e4bf | 2652 | /* Now send that blob */ |
61b67d47 | 2653 | if (qemu_savevm_send_packaged(ms->to_dst_file, bioc->data, bioc->usage)) { |
1d34e4bf DDAG |
2654 | goto fail_closefb; |
2655 | } | |
2656 | qemu_fclose(fb); | |
b82fc321 DDAG |
2657 | |
2658 | /* Send a notify to give a chance for anything that needs to happen | |
2659 | * at the transition to postcopy and after the device state; in particular | |
2660 | * spice needs to trigger a transition now | |
2661 | */ | |
2662 | ms->postcopy_after_devices = true; | |
2663 | notifier_list_notify(&migration_state_notifiers, ms); | |
2664 | ||
1d34e4bf DDAG |
2665 | ms->downtime = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) - time_at_stop; |
2666 | ||
2667 | qemu_mutex_unlock_iothread(); | |
2668 | ||
58110f0a VSO |
2669 | if (migrate_postcopy_ram()) { |
2670 | /* | |
2671 | * Although this ping is just for debug, it could potentially be | |
2672 | * used for getting a better measurement of downtime at the source. | |
2673 | */ | |
2674 | qemu_savevm_send_ping(ms->to_dst_file, 4); | |
2675 | } | |
1d34e4bf | 2676 | |
ced1c616 PB |
2677 | if (migrate_release_ram()) { |
2678 | ram_postcopy_migrated_memory_release(ms); | |
2679 | } | |
2680 | ||
89a02a9f | 2681 | ret = qemu_file_get_error(ms->to_dst_file); |
1d34e4bf DDAG |
2682 | if (ret) { |
2683 | error_report("postcopy_start: Migration stream errored"); | |
48781e5b | 2684 | migrate_set_state(&ms->state, MIGRATION_STATUS_POSTCOPY_ACTIVE, |
1d34e4bf DDAG |
2685 | MIGRATION_STATUS_FAILED); |
2686 | } | |
2687 | ||
2688 | return ret; | |
2689 | ||
2690 | fail_closefb: | |
2691 | qemu_fclose(fb); | |
2692 | fail: | |
48781e5b | 2693 | migrate_set_state(&ms->state, MIGRATION_STATUS_POSTCOPY_ACTIVE, |
1d34e4bf | 2694 | MIGRATION_STATUS_FAILED); |
ef8d6488 DDAG |
2695 | if (restart_block) { |
2696 | /* A failure happened early enough that we know the destination hasn't | |
2697 | * accessed block devices, so we're safe to recover. | |
2698 | */ | |
2699 | Error *local_err = NULL; | |
2700 | ||
2701 | bdrv_invalidate_cache_all(&local_err); | |
2702 | if (local_err) { | |
2703 | error_report_err(local_err); | |
2704 | } | |
2705 | } | |
1d34e4bf DDAG |
2706 | qemu_mutex_unlock_iothread(); |
2707 | return -1; | |
2708 | } | |
2709 | ||
e91d8951 DDAG |
2710 | /** |
2711 | * migration_maybe_pause: Pause if required to by | |
2712 | * migrate_pause_before_switchover called with the iothread locked | |
2713 | * Returns: 0 on success | |
2714 | */ | |
0331c8ca DDAG |
2715 | static int migration_maybe_pause(MigrationState *s, |
2716 | int *current_active_state, | |
2717 | int new_state) | |
e91d8951 DDAG |
2718 | { |
2719 | if (!migrate_pause_before_switchover()) { | |
2720 | return 0; | |
2721 | } | |
2722 | ||
2723 | /* Since leaving this state is not atomic with posting the semaphore | |
2724 | * it's possible that someone could have issued multiple migrate_continue | |
2725 | * and the semaphore is incorrectly positive at this point; | |
2726 | * the docs say it's undefined to reinit a semaphore that's already | |
2727 | * init'd, so use timedwait to eat up any existing posts. | |
2728 | */ | |
2729 | while (qemu_sem_timedwait(&s->pause_sem, 1) == 0) { | |
2730 | /* This block intentionally left blank */ | |
2731 | } | |
2732 | ||
2733 | qemu_mutex_unlock_iothread(); | |
2734 | migrate_set_state(&s->state, *current_active_state, | |
2735 | MIGRATION_STATUS_PRE_SWITCHOVER); | |
2736 | qemu_sem_wait(&s->pause_sem); | |
2737 | migrate_set_state(&s->state, MIGRATION_STATUS_PRE_SWITCHOVER, | |
0331c8ca DDAG |
2738 | new_state); |
2739 | *current_active_state = new_state; | |
e91d8951 DDAG |
2740 | qemu_mutex_lock_iothread(); |
2741 | ||
0331c8ca | 2742 | return s->state == new_state ? 0 : -EINVAL; |
e91d8951 DDAG |
2743 | } |
2744 | ||
09f6c85e DDAG |
2745 | /** |
2746 | * migration_completion: Used by migration_thread when there's not much left. | |
2747 | * The caller 'breaks' the loop when this returns. | |
2748 | * | |
2749 | * @s: Current migration state | |
09f6c85e | 2750 | */ |
2ad87305 | 2751 | static void migration_completion(MigrationState *s) |
09f6c85e DDAG |
2752 | { |
2753 | int ret; | |
2ad87305 | 2754 | int current_active_state = s->state; |
09f6c85e | 2755 | |
b10ac0c4 DDAG |
2756 | if (s->state == MIGRATION_STATUS_ACTIVE) { |
2757 | qemu_mutex_lock_iothread(); | |
64909f97 | 2758 | s->downtime_start = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
fb064112 | 2759 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); |
7287cbd4 | 2760 | s->vm_was_running = runstate_is_running(); |
b10ac0c4 DDAG |
2761 | ret = global_state_store(); |
2762 | ||
2763 | if (!ret) { | |
a1fbe750 | 2764 | bool inactivate = !migrate_colo_enabled(); |
b10ac0c4 | 2765 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); |
e91d8951 | 2766 | if (ret >= 0) { |
0331c8ca DDAG |
2767 | ret = migration_maybe_pause(s, ¤t_active_state, |
2768 | MIGRATION_STATUS_DEVICE); | |
e91d8951 | 2769 | } |
f07fa4cb KW |
2770 | if (ret >= 0) { |
2771 | qemu_file_set_rate_limit(s->to_dst_file, INT64_MAX); | |
a1fbe750 FZ |
2772 | ret = qemu_savevm_state_complete_precopy(s->to_dst_file, false, |
2773 | inactivate); | |
f07fa4cb | 2774 | } |
a1fbe750 FZ |
2775 | if (inactivate && ret >= 0) { |
2776 | s->block_inactive = true; | |
b10ac0c4 DDAG |
2777 | } |
2778 | } | |
2779 | qemu_mutex_unlock_iothread(); | |
09f6c85e | 2780 | |
b10ac0c4 DDAG |
2781 | if (ret < 0) { |
2782 | goto fail; | |
09f6c85e | 2783 | } |
b10ac0c4 DDAG |
2784 | } else if (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { |
2785 | trace_migration_completion_postcopy_end(); | |
2786 | ||
89a02a9f | 2787 | qemu_savevm_state_complete_postcopy(s->to_dst_file); |
b10ac0c4 | 2788 | trace_migration_completion_postcopy_end_after_complete(); |
09f6c85e | 2789 | } |
09f6c85e | 2790 | |
b10ac0c4 DDAG |
2791 | /* |
2792 | * If rp was opened we must clean up the thread before | |
2793 | * cleaning everything else up (since if there are no failures | |
2794 | * it will wait for the destination to send it's status in | |
2795 | * a SHUT command). | |
b10ac0c4 | 2796 | */ |
0425dc97 | 2797 | if (s->rp_state.from_dst_file) { |
b10ac0c4 | 2798 | int rp_error; |
0425dc97 | 2799 | trace_migration_return_path_end_before(); |
b10ac0c4 | 2800 | rp_error = await_return_path_close_on_source(s); |
0425dc97 | 2801 | trace_migration_return_path_end_after(rp_error); |
b10ac0c4 | 2802 | if (rp_error) { |
fe904ea8 | 2803 | goto fail_invalidate; |
b10ac0c4 | 2804 | } |
09f6c85e DDAG |
2805 | } |
2806 | ||
89a02a9f | 2807 | if (qemu_file_get_error(s->to_dst_file)) { |
09f6c85e | 2808 | trace_migration_completion_file_err(); |
fe904ea8 | 2809 | goto fail_invalidate; |
09f6c85e DDAG |
2810 | } |
2811 | ||
0b827d5e HZ |
2812 | if (!migrate_colo_enabled()) { |
2813 | migrate_set_state(&s->state, current_active_state, | |
2814 | MIGRATION_STATUS_COMPLETED); | |
2815 | } | |
2816 | ||
09f6c85e DDAG |
2817 | return; |
2818 | ||
fe904ea8 GK |
2819 | fail_invalidate: |
2820 | /* If not doing postcopy, vm_start() will be called: let's regain | |
2821 | * control on images. | |
2822 | */ | |
6039dd5b DDAG |
2823 | if (s->state == MIGRATION_STATUS_ACTIVE || |
2824 | s->state == MIGRATION_STATUS_DEVICE) { | |
fe904ea8 GK |
2825 | Error *local_err = NULL; |
2826 | ||
1d2acc31 | 2827 | qemu_mutex_lock_iothread(); |
fe904ea8 GK |
2828 | bdrv_invalidate_cache_all(&local_err); |
2829 | if (local_err) { | |
2830 | error_report_err(local_err); | |
1d2acc31 HZ |
2831 | } else { |
2832 | s->block_inactive = false; | |
fe904ea8 | 2833 | } |
1d2acc31 | 2834 | qemu_mutex_unlock_iothread(); |
fe904ea8 GK |
2835 | } |
2836 | ||
09f6c85e | 2837 | fail: |
48781e5b HZ |
2838 | migrate_set_state(&s->state, current_active_state, |
2839 | MIGRATION_STATUS_FAILED); | |
09f6c85e DDAG |
2840 | } |
2841 | ||
35a6ed4f HZ |
2842 | bool migrate_colo_enabled(void) |
2843 | { | |
2844 | MigrationState *s = migrate_get_current(); | |
2845 | return s->enabled_capabilities[MIGRATION_CAPABILITY_X_COLO]; | |
2846 | } | |
2847 | ||
b23c2ade PX |
2848 | typedef enum MigThrError { |
2849 | /* No error detected */ | |
2850 | MIG_THR_ERR_NONE = 0, | |
2851 | /* Detected error, but resumed successfully */ | |
2852 | MIG_THR_ERR_RECOVERED = 1, | |
2853 | /* Detected fatal error, need to exit */ | |
2854 | MIG_THR_ERR_FATAL = 2, | |
2855 | } MigThrError; | |
2856 | ||
94190696 PX |
2857 | static int postcopy_resume_handshake(MigrationState *s) |
2858 | { | |
2859 | qemu_savevm_send_postcopy_resume(s->to_dst_file); | |
2860 | ||
2861 | while (s->state == MIGRATION_STATUS_POSTCOPY_RECOVER) { | |
2862 | qemu_sem_wait(&s->rp_state.rp_sem); | |
2863 | } | |
2864 | ||
2865 | if (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { | |
2866 | return 0; | |
2867 | } | |
2868 | ||
2869 | return -1; | |
2870 | } | |
2871 | ||
135b87b4 PX |
2872 | /* Return zero if success, or <0 for error */ |
2873 | static int postcopy_do_resume(MigrationState *s) | |
2874 | { | |
d1b8eadb PX |
2875 | int ret; |
2876 | ||
2877 | /* | |
2878 | * Call all the resume_prepare() hooks, so that modules can be | |
2879 | * ready for the migration resume. | |
2880 | */ | |
2881 | ret = qemu_savevm_state_resume_prepare(s); | |
2882 | if (ret) { | |
2883 | error_report("%s: resume_prepare() failure detected: %d", | |
2884 | __func__, ret); | |
2885 | return ret; | |
2886 | } | |
2887 | ||
2888 | /* | |
94190696 PX |
2889 | * Last handshake with destination on the resume (destination will |
2890 | * switch to postcopy-active afterwards) | |
d1b8eadb | 2891 | */ |
94190696 PX |
2892 | ret = postcopy_resume_handshake(s); |
2893 | if (ret) { | |
2894 | error_report("%s: handshake failed: %d", __func__, ret); | |
2895 | return ret; | |
2896 | } | |
d1b8eadb | 2897 | |
135b87b4 PX |
2898 | return 0; |
2899 | } | |
2900 | ||
b23c2ade PX |
2901 | /* |
2902 | * We don't return until we are in a safe state to continue current | |
2903 | * postcopy migration. Returns MIG_THR_ERR_RECOVERED if recovered, or | |
2904 | * MIG_THR_ERR_FATAL if unrecovery failure happened. | |
2905 | */ | |
2906 | static MigThrError postcopy_pause(MigrationState *s) | |
2907 | { | |
2908 | assert(s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
b23c2ade | 2909 | |
135b87b4 | 2910 | while (true) { |
62df066f PX |
2911 | QEMUFile *file; |
2912 | ||
135b87b4 PX |
2913 | migrate_set_state(&s->state, s->state, |
2914 | MIGRATION_STATUS_POSTCOPY_PAUSED); | |
b23c2ade | 2915 | |
135b87b4 PX |
2916 | /* Current channel is possibly broken. Release it. */ |
2917 | assert(s->to_dst_file); | |
62df066f PX |
2918 | qemu_mutex_lock(&s->qemu_file_lock); |
2919 | file = s->to_dst_file; | |
135b87b4 | 2920 | s->to_dst_file = NULL; |
62df066f PX |
2921 | qemu_mutex_unlock(&s->qemu_file_lock); |
2922 | ||
2923 | qemu_file_shutdown(file); | |
2924 | qemu_fclose(file); | |
b23c2ade | 2925 | |
135b87b4 PX |
2926 | error_report("Detected IO failure for postcopy. " |
2927 | "Migration paused."); | |
b23c2ade | 2928 | |
135b87b4 PX |
2929 | /* |
2930 | * We wait until things fixed up. Then someone will setup the | |
2931 | * status back for us. | |
2932 | */ | |
2933 | while (s->state == MIGRATION_STATUS_POSTCOPY_PAUSED) { | |
2934 | qemu_sem_wait(&s->postcopy_pause_sem); | |
2935 | } | |
2936 | ||
2937 | if (s->state == MIGRATION_STATUS_POSTCOPY_RECOVER) { | |
2938 | /* Woken up by a recover procedure. Give it a shot */ | |
b23c2ade | 2939 | |
135b87b4 PX |
2940 | /* |
2941 | * Firstly, let's wake up the return path now, with a new | |
2942 | * return path channel. | |
2943 | */ | |
2944 | qemu_sem_post(&s->postcopy_pause_rp_sem); | |
2945 | ||
2946 | /* Do the resume logic */ | |
2947 | if (postcopy_do_resume(s) == 0) { | |
2948 | /* Let's continue! */ | |
2949 | trace_postcopy_pause_continued(); | |
2950 | return MIG_THR_ERR_RECOVERED; | |
2951 | } else { | |
2952 | /* | |
2953 | * Something wrong happened during the recovery, let's | |
2954 | * pause again. Pause is always better than throwing | |
2955 | * data away. | |
2956 | */ | |
2957 | continue; | |
2958 | } | |
2959 | } else { | |
2960 | /* This is not right... Time to quit. */ | |
2961 | return MIG_THR_ERR_FATAL; | |
2962 | } | |
2963 | } | |
b23c2ade PX |
2964 | } |
2965 | ||
2966 | static MigThrError migration_detect_error(MigrationState *s) | |
2967 | { | |
2968 | int ret; | |
c3c5eae6 DDAG |
2969 | int state = s->state; |
2970 | ||
2971 | if (state == MIGRATION_STATUS_CANCELLING || | |
2972 | state == MIGRATION_STATUS_CANCELLED) { | |
2973 | /* End the migration, but don't set the state to failed */ | |
2974 | return MIG_THR_ERR_FATAL; | |
2975 | } | |
b23c2ade PX |
2976 | |
2977 | /* Try to detect any file errors */ | |
2978 | ret = qemu_file_get_error(s->to_dst_file); | |
2979 | ||
2980 | if (!ret) { | |
2981 | /* Everything is fine */ | |
2982 | return MIG_THR_ERR_NONE; | |
2983 | } | |
2984 | ||
c3c5eae6 | 2985 | if (state == MIGRATION_STATUS_POSTCOPY_ACTIVE && ret == -EIO) { |
b23c2ade PX |
2986 | /* |
2987 | * For postcopy, we allow the network to be down for a | |
2988 | * while. After that, it can be continued by a | |
2989 | * recovery phase. | |
2990 | */ | |
2991 | return postcopy_pause(s); | |
2992 | } else { | |
2993 | /* | |
2994 | * For precopy (or postcopy with error outside IO), we fail | |
2995 | * with no time. | |
2996 | */ | |
c3c5eae6 | 2997 | migrate_set_state(&s->state, state, MIGRATION_STATUS_FAILED); |
b23c2ade PX |
2998 | trace_migration_thread_file_err(); |
2999 | ||
3000 | /* Time to stop the migration, now. */ | |
3001 | return MIG_THR_ERR_FATAL; | |
3002 | } | |
3003 | } | |
3004 | ||
0c8f0efd JQ |
3005 | /* How many bytes have we transferred since the beggining of the migration */ |
3006 | static uint64_t migration_total_bytes(MigrationState *s) | |
3007 | { | |
b9ee2f7d | 3008 | return qemu_ftell(s->to_dst_file) + ram_counters.multifd_bytes; |
0c8f0efd JQ |
3009 | } |
3010 | ||
cf011f08 PX |
3011 | static void migration_calculate_complete(MigrationState *s) |
3012 | { | |
0c8f0efd | 3013 | uint64_t bytes = migration_total_bytes(s); |
cf011f08 | 3014 | int64_t end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
6cde6fbe | 3015 | int64_t transfer_time; |
cf011f08 PX |
3016 | |
3017 | s->total_time = end_time - s->start_time; | |
3018 | if (!s->downtime) { | |
3019 | /* | |
3020 | * It's still not set, so we are precopy migration. For | |
3021 | * postcopy, downtime is calculated during postcopy_start(). | |
3022 | */ | |
3023 | s->downtime = end_time - s->downtime_start; | |
3024 | } | |
3025 | ||
6cde6fbe JQ |
3026 | transfer_time = s->total_time - s->setup_time; |
3027 | if (transfer_time) { | |
3028 | s->mbps = ((double) bytes * 8.0) / transfer_time / 1000; | |
cf011f08 PX |
3029 | } |
3030 | } | |
3031 | ||
b15df1ae PX |
3032 | static void migration_update_counters(MigrationState *s, |
3033 | int64_t current_time) | |
3034 | { | |
aecbfe9c | 3035 | uint64_t transferred, transferred_pages, time_spent; |
0c8f0efd | 3036 | uint64_t current_bytes; /* bytes transferred since the beginning */ |
b15df1ae PX |
3037 | double bandwidth; |
3038 | ||
3039 | if (current_time < s->iteration_start_time + BUFFER_DELAY) { | |
3040 | return; | |
3041 | } | |
3042 | ||
0c8f0efd JQ |
3043 | current_bytes = migration_total_bytes(s); |
3044 | transferred = current_bytes - s->iteration_initial_bytes; | |
b15df1ae PX |
3045 | time_spent = current_time - s->iteration_start_time; |
3046 | bandwidth = (double)transferred / time_spent; | |
0781c1ed | 3047 | s->threshold_size = bandwidth * s->parameters.downtime_limit; |
b15df1ae PX |
3048 | |
3049 | s->mbps = (((double) transferred * 8.0) / | |
3050 | ((double) time_spent / 1000.0)) / 1000.0 / 1000.0; | |
3051 | ||
aecbfe9c XG |
3052 | transferred_pages = ram_get_total_transferred_pages() - |
3053 | s->iteration_initial_pages; | |
3054 | s->pages_per_second = (double) transferred_pages / | |
3055 | (((double) time_spent / 1000.0)); | |
3056 | ||
b15df1ae PX |
3057 | /* |
3058 | * if we haven't sent anything, we don't want to | |
3059 | * recalculate. 10000 is a small enough number for our purposes | |
3060 | */ | |
3061 | if (ram_counters.dirty_pages_rate && transferred > 10000) { | |
650af890 | 3062 | s->expected_downtime = ram_counters.remaining / bandwidth; |
b15df1ae PX |
3063 | } |
3064 | ||
3065 | qemu_file_reset_rate_limit(s->to_dst_file); | |
3066 | ||
3067 | s->iteration_start_time = current_time; | |
0c8f0efd | 3068 | s->iteration_initial_bytes = current_bytes; |
aecbfe9c | 3069 | s->iteration_initial_pages = ram_get_total_transferred_pages(); |
b15df1ae PX |
3070 | |
3071 | trace_migrate_transferred(transferred, time_spent, | |
0781c1ed | 3072 | bandwidth, s->threshold_size); |
b15df1ae PX |
3073 | } |
3074 | ||
2ad87305 PX |
3075 | /* Migration thread iteration status */ |
3076 | typedef enum { | |
3077 | MIG_ITERATE_RESUME, /* Resume current iteration */ | |
3078 | MIG_ITERATE_SKIP, /* Skip current iteration */ | |
3079 | MIG_ITERATE_BREAK, /* Break the loop */ | |
3080 | } MigIterateState; | |
3081 | ||
3082 | /* | |
3083 | * Return true if continue to the next iteration directly, false | |
3084 | * otherwise. | |
3085 | */ | |
3086 | static MigIterateState migration_iteration_run(MigrationState *s) | |
3087 | { | |
47995026 | 3088 | uint64_t pending_size, pend_pre, pend_compat, pend_post; |
2ad87305 PX |
3089 | bool in_postcopy = s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE; |
3090 | ||
47995026 VSO |
3091 | qemu_savevm_state_pending(s->to_dst_file, s->threshold_size, &pend_pre, |
3092 | &pend_compat, &pend_post); | |
3093 | pending_size = pend_pre + pend_compat + pend_post; | |
2ad87305 PX |
3094 | |
3095 | trace_migrate_pending(pending_size, s->threshold_size, | |
47995026 | 3096 | pend_pre, pend_compat, pend_post); |
2ad87305 PX |
3097 | |
3098 | if (pending_size && pending_size >= s->threshold_size) { | |
3099 | /* Still a significant amount to transfer */ | |
3100 | if (migrate_postcopy() && !in_postcopy && | |
47995026 | 3101 | pend_pre <= s->threshold_size && |
2ad87305 PX |
3102 | atomic_read(&s->start_postcopy)) { |
3103 | if (postcopy_start(s)) { | |
3104 | error_report("%s: postcopy failed to start", __func__); | |
3105 | } | |
3106 | return MIG_ITERATE_SKIP; | |
3107 | } | |
3108 | /* Just another iteration step */ | |
3109 | qemu_savevm_state_iterate(s->to_dst_file, | |
3110 | s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
3111 | } else { | |
3112 | trace_migration_thread_low_pending(pending_size); | |
3113 | migration_completion(s); | |
3114 | return MIG_ITERATE_BREAK; | |
3115 | } | |
3116 | ||
3117 | return MIG_ITERATE_RESUME; | |
3118 | } | |
3119 | ||
199aa6d4 PX |
3120 | static void migration_iteration_finish(MigrationState *s) |
3121 | { | |
3122 | /* If we enabled cpu throttling for auto-converge, turn it off. */ | |
3123 | cpu_throttle_stop(); | |
3124 | ||
3125 | qemu_mutex_lock_iothread(); | |
3126 | switch (s->state) { | |
3127 | case MIGRATION_STATUS_COMPLETED: | |
3128 | migration_calculate_complete(s); | |
3129 | runstate_set(RUN_STATE_POSTMIGRATE); | |
3130 | break; | |
3131 | ||
3132 | case MIGRATION_STATUS_ACTIVE: | |
3133 | /* | |
3134 | * We should really assert here, but since it's during | |
3135 | * migration, let's try to reduce the usage of assertions. | |
3136 | */ | |
3137 | if (!migrate_colo_enabled()) { | |
3138 | error_report("%s: critical error: calling COLO code without " | |
3139 | "COLO enabled", __func__); | |
3140 | } | |
3141 | migrate_start_colo_process(s); | |
3142 | /* | |
3143 | * Fixme: we will run VM in COLO no matter its old running state. | |
3144 | * After exited COLO, we will keep running. | |
3145 | */ | |
3146 | s->vm_was_running = true; | |
3147 | /* Fallthrough */ | |
3148 | case MIGRATION_STATUS_FAILED: | |
3149 | case MIGRATION_STATUS_CANCELLED: | |
57225e5f | 3150 | case MIGRATION_STATUS_CANCELLING: |
199aa6d4 PX |
3151 | if (s->vm_was_running) { |
3152 | vm_start(); | |
3153 | } else { | |
3154 | if (runstate_check(RUN_STATE_FINISH_MIGRATE)) { | |
3155 | runstate_set(RUN_STATE_POSTMIGRATE); | |
3156 | } | |
3157 | } | |
3158 | break; | |
3159 | ||
3160 | default: | |
3161 | /* Should not reach here, but if so, forgive the VM. */ | |
3162 | error_report("%s: Unknown ending state %d", __func__, s->state); | |
3163 | break; | |
3164 | } | |
fd392cfa | 3165 | migrate_fd_cleanup_schedule(s); |
199aa6d4 PX |
3166 | qemu_mutex_unlock_iothread(); |
3167 | } | |
3168 | ||
ad767bed DDAG |
3169 | void migration_make_urgent_request(void) |
3170 | { | |
3171 | qemu_sem_post(&migrate_get_current()->rate_limit_sem); | |
3172 | } | |
3173 | ||
3174 | void migration_consume_urgent_request(void) | |
3175 | { | |
3176 | qemu_sem_wait(&migrate_get_current()->rate_limit_sem); | |
3177 | } | |
3178 | ||
70b20477 DDAG |
3179 | /* |
3180 | * Master migration thread on the source VM. | |
3181 | * It drives the migration and pumps the data down the outgoing channel. | |
3182 | */ | |
5f496a1b | 3183 | static void *migration_thread(void *opaque) |
0d82d0e8 | 3184 | { |
9848a404 | 3185 | MigrationState *s = opaque; |
bc72ad67 | 3186 | int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST); |
b23c2ade | 3187 | MigThrError thr_error; |
ad767bed | 3188 | bool urgent = false; |
76f5933a | 3189 | |
ab28bd23 PB |
3190 | rcu_register_thread(); |
3191 | ||
892ae715 | 3192 | object_ref(OBJECT(s)); |
b15df1ae PX |
3193 | s->iteration_start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
3194 | ||
89a02a9f | 3195 | qemu_savevm_state_header(s->to_dst_file); |
1d34e4bf | 3196 | |
62a02658 PX |
3197 | /* |
3198 | * If we opened the return path, we need to make sure dst has it | |
3199 | * opened as well. | |
3200 | */ | |
3201 | if (s->rp_state.from_dst_file) { | |
1d34e4bf | 3202 | /* Now tell the dest that it should open its end so it can reply */ |
89a02a9f | 3203 | qemu_savevm_send_open_return_path(s->to_dst_file); |
1d34e4bf DDAG |
3204 | |
3205 | /* And do a ping that will make stuff easier to debug */ | |
89a02a9f | 3206 | qemu_savevm_send_ping(s->to_dst_file, 1); |
0425dc97 | 3207 | } |
1d34e4bf | 3208 | |
58110f0a | 3209 | if (migrate_postcopy()) { |
1d34e4bf DDAG |
3210 | /* |
3211 | * Tell the destination that we *might* want to do postcopy later; | |
3212 | * if the other end can't do postcopy it should fail now, nice and | |
3213 | * early. | |
3214 | */ | |
89a02a9f | 3215 | qemu_savevm_send_postcopy_advise(s->to_dst_file); |
1d34e4bf DDAG |
3216 | } |
3217 | ||
aad555c2 ZC |
3218 | if (migrate_colo_enabled()) { |
3219 | /* Notify migration destination that we enable COLO */ | |
3220 | qemu_savevm_send_colo_enable(s->to_dst_file); | |
3221 | } | |
3222 | ||
9907e842 | 3223 | qemu_savevm_state_setup(s->to_dst_file); |
0d82d0e8 | 3224 | |
bc72ad67 | 3225 | s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start; |
48781e5b HZ |
3226 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
3227 | MIGRATION_STATUS_ACTIVE); | |
29ae8a41 | 3228 | |
9ec055ae DDAG |
3229 | trace_migration_thread_setup_complete(); |
3230 | ||
3231 | while (s->state == MIGRATION_STATUS_ACTIVE || | |
3232 | s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { | |
a3e879cd | 3233 | int64_t current_time; |
0d82d0e8 | 3234 | |
ad767bed | 3235 | if (urgent || !qemu_file_rate_limit(s->to_dst_file)) { |
2ad87305 PX |
3236 | MigIterateState iter_state = migration_iteration_run(s); |
3237 | if (iter_state == MIG_ITERATE_SKIP) { | |
3238 | continue; | |
3239 | } else if (iter_state == MIG_ITERATE_BREAK) { | |
09f6c85e | 3240 | break; |
c369f40d JQ |
3241 | } |
3242 | } | |
f4410a5d | 3243 | |
b23c2ade PX |
3244 | /* |
3245 | * Try to detect any kind of failures, and see whether we | |
3246 | * should stop the migration now. | |
3247 | */ | |
3248 | thr_error = migration_detect_error(s); | |
3249 | if (thr_error == MIG_THR_ERR_FATAL) { | |
3250 | /* Stop migration */ | |
fd45ee2c | 3251 | break; |
b23c2ade PX |
3252 | } else if (thr_error == MIG_THR_ERR_RECOVERED) { |
3253 | /* | |
3254 | * Just recovered from a e.g. network failure, reset all | |
3255 | * the local variables. This is important to avoid | |
3256 | * breaking transferred_bytes and bandwidth calculation | |
3257 | */ | |
3258 | s->iteration_start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); | |
3259 | s->iteration_initial_bytes = 0; | |
fd45ee2c | 3260 | } |
b15df1ae | 3261 | |
bc72ad67 | 3262 | current_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
0d82d0e8 | 3263 | |
b15df1ae PX |
3264 | migration_update_counters(s, current_time); |
3265 | ||
ad767bed | 3266 | urgent = false; |
89a02a9f | 3267 | if (qemu_file_rate_limit(s->to_dst_file)) { |
ad767bed DDAG |
3268 | /* Wait for a delay to do rate limiting OR |
3269 | * something urgent to post the semaphore. | |
3270 | */ | |
3271 | int ms = s->iteration_start_time + BUFFER_DELAY - current_time; | |
3272 | trace_migration_thread_ratelimit_pre(ms); | |
3273 | if (qemu_sem_timedwait(&s->rate_limit_sem, ms) == 0) { | |
3274 | /* We were worken by one or more urgent things but | |
3275 | * the timedwait will have consumed one of them. | |
3276 | * The service routine for the urgent wake will dec | |
3277 | * the semaphore itself for each item it consumes, | |
3278 | * so add this one we just eat back. | |
3279 | */ | |
3280 | qemu_sem_post(&s->rate_limit_sem); | |
3281 | urgent = true; | |
3282 | } | |
3283 | trace_migration_thread_ratelimit_post(urgent); | |
0d82d0e8 | 3284 | } |
a3fa1d78 PB |
3285 | } |
3286 | ||
1d34e4bf | 3287 | trace_migration_thread_after_loop(); |
199aa6d4 | 3288 | migration_iteration_finish(s); |
892ae715 | 3289 | object_unref(OBJECT(s)); |
ab28bd23 | 3290 | rcu_unregister_thread(); |
0d82d0e8 JQ |
3291 | return NULL; |
3292 | } | |
3293 | ||
cce8040b | 3294 | void migrate_fd_connect(MigrationState *s, Error *error_in) |
0d82d0e8 | 3295 | { |
d3e35b8f PX |
3296 | int64_t rate_limit; |
3297 | bool resume = s->state == MIGRATION_STATUS_POSTCOPY_PAUSED; | |
3298 | ||
2ff30257 | 3299 | s->expected_downtime = s->parameters.downtime_limit; |
fd392cfa | 3300 | s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup_bh, s); |
cce8040b DDAG |
3301 | if (error_in) { |
3302 | migrate_fd_error(s, error_in); | |
3303 | migrate_fd_cleanup(s); | |
3304 | return; | |
3305 | } | |
0d82d0e8 | 3306 | |
d3e35b8f PX |
3307 | if (resume) { |
3308 | /* This is a resumed migration */ | |
3309 | rate_limit = INT64_MAX; | |
3310 | } else { | |
3311 | /* This is a fresh new migration */ | |
3312 | rate_limit = s->parameters.max_bandwidth / XFER_LIMIT_RATIO; | |
442773ce | 3313 | |
d3e35b8f PX |
3314 | /* Notify before starting migration thread */ |
3315 | notifier_list_notify(&migration_state_notifiers, s); | |
3316 | } | |
3317 | ||
3318 | qemu_file_set_rate_limit(s->to_dst_file, rate_limit); | |
3319 | qemu_file_set_blocking(s->to_dst_file, true); | |
9287ac27 | 3320 | |
1d34e4bf | 3321 | /* |
c788ada8 PX |
3322 | * Open the return path. For postcopy, it is used exclusively. For |
3323 | * precopy, only if user specified "return-path" capability would | |
3324 | * QEMU uses the return path. | |
1d34e4bf | 3325 | */ |
c788ada8 | 3326 | if (migrate_postcopy_ram() || migrate_use_return_path()) { |
d3e35b8f | 3327 | if (open_return_path_on_source(s, !resume)) { |
1d34e4bf | 3328 | error_report("Unable to open return-path for postcopy"); |
d3e35b8f | 3329 | migrate_set_state(&s->state, s->state, MIGRATION_STATUS_FAILED); |
1d34e4bf DDAG |
3330 | migrate_fd_cleanup(s); |
3331 | return; | |
3332 | } | |
3333 | } | |
3334 | ||
d3e35b8f | 3335 | if (resume) { |
135b87b4 PX |
3336 | /* Wakeup the main migration thread to do the recovery */ |
3337 | migrate_set_state(&s->state, MIGRATION_STATUS_POSTCOPY_PAUSED, | |
3338 | MIGRATION_STATUS_POSTCOPY_RECOVER); | |
3339 | qemu_sem_post(&s->postcopy_pause_sem); | |
d3e35b8f PX |
3340 | return; |
3341 | } | |
3342 | ||
f986c3d2 JQ |
3343 | if (multifd_save_setup() != 0) { |
3344 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, | |
3345 | MIGRATION_STATUS_FAILED); | |
3346 | migrate_fd_cleanup(s); | |
3347 | return; | |
3348 | } | |
009fad7f | 3349 | qemu_thread_create(&s->thread, "live_migration", migration_thread, s, |
bb1fadc4 | 3350 | QEMU_THREAD_JOINABLE); |
1d34e4bf | 3351 | s->migration_thread_running = true; |
0d82d0e8 | 3352 | } |
093e3c42 | 3353 | |
9d18af93 PX |
3354 | void migration_global_dump(Monitor *mon) |
3355 | { | |
3356 | MigrationState *ms = migrate_get_current(); | |
3357 | ||
6f0f6428 JQ |
3358 | monitor_printf(mon, "globals:\n"); |
3359 | monitor_printf(mon, "store-global-state: %s\n", | |
3360 | ms->store_global_state ? "on" : "off"); | |
3361 | monitor_printf(mon, "only-migratable: %s\n", | |
811f8652 | 3362 | only_migratable ? "on" : "off"); |
6f0f6428 JQ |
3363 | monitor_printf(mon, "send-configuration: %s\n", |
3364 | ms->send_configuration ? "on" : "off"); | |
3365 | monitor_printf(mon, "send-section-footer: %s\n", | |
3366 | ms->send_section_footer ? "on" : "off"); | |
f548222c XG |
3367 | monitor_printf(mon, "decompress-error-check: %s\n", |
3368 | ms->decompress_error_check ? "on" : "off"); | |
002cad6b PX |
3369 | monitor_printf(mon, "clear-bitmap-shift: %u\n", |
3370 | ms->clear_bitmap_shift); | |
9d18af93 PX |
3371 | } |
3372 | ||
20814758 PX |
3373 | #define DEFINE_PROP_MIG_CAP(name, x) \ |
3374 | DEFINE_PROP_BOOL(name, MigrationState, enabled_capabilities[x], false) | |
3375 | ||
5272298c PX |
3376 | static Property migration_properties[] = { |
3377 | DEFINE_PROP_BOOL("store-global-state", MigrationState, | |
3378 | store_global_state, true), | |
71dd4c1a PX |
3379 | DEFINE_PROP_BOOL("send-configuration", MigrationState, |
3380 | send_configuration, true), | |
15c38503 PX |
3381 | DEFINE_PROP_BOOL("send-section-footer", MigrationState, |
3382 | send_section_footer, true), | |
f548222c XG |
3383 | DEFINE_PROP_BOOL("decompress-error-check", MigrationState, |
3384 | decompress_error_check, true), | |
002cad6b PX |
3385 | DEFINE_PROP_UINT8("x-clear-bitmap-shift", MigrationState, |
3386 | clear_bitmap_shift, CLEAR_BITMAP_SHIFT_DEFAULT), | |
89632faf PX |
3387 | |
3388 | /* Migration parameters */ | |
741d4086 | 3389 | DEFINE_PROP_UINT8("x-compress-level", MigrationState, |
89632faf PX |
3390 | parameters.compress_level, |
3391 | DEFAULT_MIGRATE_COMPRESS_LEVEL), | |
741d4086 | 3392 | DEFINE_PROP_UINT8("x-compress-threads", MigrationState, |
89632faf PX |
3393 | parameters.compress_threads, |
3394 | DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT), | |
1d58872a XG |
3395 | DEFINE_PROP_BOOL("x-compress-wait-thread", MigrationState, |
3396 | parameters.compress_wait_thread, true), | |
741d4086 | 3397 | DEFINE_PROP_UINT8("x-decompress-threads", MigrationState, |
89632faf PX |
3398 | parameters.decompress_threads, |
3399 | DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT), | |
741d4086 | 3400 | DEFINE_PROP_UINT8("x-cpu-throttle-initial", MigrationState, |
89632faf PX |
3401 | parameters.cpu_throttle_initial, |
3402 | DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL), | |
741d4086 | 3403 | DEFINE_PROP_UINT8("x-cpu-throttle-increment", MigrationState, |
89632faf PX |
3404 | parameters.cpu_throttle_increment, |
3405 | DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT), | |
741d4086 | 3406 | DEFINE_PROP_SIZE("x-max-bandwidth", MigrationState, |
89632faf | 3407 | parameters.max_bandwidth, MAX_THROTTLE), |
741d4086 | 3408 | DEFINE_PROP_UINT64("x-downtime-limit", MigrationState, |
89632faf PX |
3409 | parameters.downtime_limit, |
3410 | DEFAULT_MIGRATE_SET_DOWNTIME), | |
741d4086 | 3411 | DEFINE_PROP_UINT32("x-checkpoint-delay", MigrationState, |
89632faf PX |
3412 | parameters.x_checkpoint_delay, |
3413 | DEFAULT_MIGRATE_X_CHECKPOINT_DELAY), | |
cbfd6c95 JQ |
3414 | DEFINE_PROP_UINT8("multifd-channels", MigrationState, |
3415 | parameters.multifd_channels, | |
4075fb1c | 3416 | DEFAULT_MIGRATE_MULTIFD_CHANNELS), |
73af8dd8 JQ |
3417 | DEFINE_PROP_SIZE("xbzrle-cache-size", MigrationState, |
3418 | parameters.xbzrle_cache_size, | |
3419 | DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE), | |
7e555c6c DDAG |
3420 | DEFINE_PROP_SIZE("max-postcopy-bandwidth", MigrationState, |
3421 | parameters.max_postcopy_bandwidth, | |
3422 | DEFAULT_MIGRATE_MAX_POSTCOPY_BANDWIDTH), | |
4cbc9c7f LQ |
3423 | DEFINE_PROP_UINT8("max-cpu-throttle", MigrationState, |
3424 | parameters.max_cpu_throttle, | |
3425 | DEFAULT_MIGRATE_MAX_CPU_THROTTLE), | |
ee3d96ba DDAG |
3426 | DEFINE_PROP_SIZE("announce-initial", MigrationState, |
3427 | parameters.announce_initial, | |
3428 | DEFAULT_MIGRATE_ANNOUNCE_INITIAL), | |
3429 | DEFINE_PROP_SIZE("announce-max", MigrationState, | |
3430 | parameters.announce_max, | |
3431 | DEFAULT_MIGRATE_ANNOUNCE_MAX), | |
3432 | DEFINE_PROP_SIZE("announce-rounds", MigrationState, | |
3433 | parameters.announce_rounds, | |
3434 | DEFAULT_MIGRATE_ANNOUNCE_ROUNDS), | |
3435 | DEFINE_PROP_SIZE("announce-step", MigrationState, | |
3436 | parameters.announce_step, | |
3437 | DEFAULT_MIGRATE_ANNOUNCE_STEP), | |
20814758 PX |
3438 | |
3439 | /* Migration capabilities */ | |
3440 | DEFINE_PROP_MIG_CAP("x-xbzrle", MIGRATION_CAPABILITY_XBZRLE), | |
3441 | DEFINE_PROP_MIG_CAP("x-rdma-pin-all", MIGRATION_CAPABILITY_RDMA_PIN_ALL), | |
3442 | DEFINE_PROP_MIG_CAP("x-auto-converge", MIGRATION_CAPABILITY_AUTO_CONVERGE), | |
3443 | DEFINE_PROP_MIG_CAP("x-zero-blocks", MIGRATION_CAPABILITY_ZERO_BLOCKS), | |
3444 | DEFINE_PROP_MIG_CAP("x-compress", MIGRATION_CAPABILITY_COMPRESS), | |
3445 | DEFINE_PROP_MIG_CAP("x-events", MIGRATION_CAPABILITY_EVENTS), | |
3446 | DEFINE_PROP_MIG_CAP("x-postcopy-ram", MIGRATION_CAPABILITY_POSTCOPY_RAM), | |
3447 | DEFINE_PROP_MIG_CAP("x-colo", MIGRATION_CAPABILITY_X_COLO), | |
3448 | DEFINE_PROP_MIG_CAP("x-release-ram", MIGRATION_CAPABILITY_RELEASE_RAM), | |
3449 | DEFINE_PROP_MIG_CAP("x-block", MIGRATION_CAPABILITY_BLOCK), | |
3450 | DEFINE_PROP_MIG_CAP("x-return-path", MIGRATION_CAPABILITY_RETURN_PATH), | |
cbfd6c95 | 3451 | DEFINE_PROP_MIG_CAP("x-multifd", MIGRATION_CAPABILITY_MULTIFD), |
20814758 | 3452 | |
5272298c PX |
3453 | DEFINE_PROP_END_OF_LIST(), |
3454 | }; | |
3455 | ||
e5cb7e76 PX |
3456 | static void migration_class_init(ObjectClass *klass, void *data) |
3457 | { | |
3458 | DeviceClass *dc = DEVICE_CLASS(klass); | |
3459 | ||
3460 | dc->user_creatable = false; | |
5272298c | 3461 | dc->props = migration_properties; |
e5cb7e76 PX |
3462 | } |
3463 | ||
b91bf5e4 MAL |
3464 | static void migration_instance_finalize(Object *obj) |
3465 | { | |
3466 | MigrationState *ms = MIGRATION_OBJ(obj); | |
3467 | MigrationParameters *params = &ms->parameters; | |
3468 | ||
87db1a7d | 3469 | qemu_mutex_destroy(&ms->error_mutex); |
62df066f | 3470 | qemu_mutex_destroy(&ms->qemu_file_lock); |
b91bf5e4 MAL |
3471 | g_free(params->tls_hostname); |
3472 | g_free(params->tls_creds); | |
ad767bed | 3473 | qemu_sem_destroy(&ms->rate_limit_sem); |
e91d8951 | 3474 | qemu_sem_destroy(&ms->pause_sem); |
b23c2ade | 3475 | qemu_sem_destroy(&ms->postcopy_pause_sem); |
14b1742e | 3476 | qemu_sem_destroy(&ms->postcopy_pause_rp_sem); |
edd090c7 | 3477 | qemu_sem_destroy(&ms->rp_state.rp_sem); |
ab105cc1 | 3478 | error_free(ms->error); |
b91bf5e4 MAL |
3479 | } |
3480 | ||
e5cb7e76 PX |
3481 | static void migration_instance_init(Object *obj) |
3482 | { | |
3483 | MigrationState *ms = MIGRATION_OBJ(obj); | |
8b0b29dc | 3484 | MigrationParameters *params = &ms->parameters; |
e5cb7e76 PX |
3485 | |
3486 | ms->state = MIGRATION_STATUS_NONE; | |
e5cb7e76 | 3487 | ms->mbps = -1; |
aecbfe9c | 3488 | ms->pages_per_second = -1; |
e91d8951 | 3489 | qemu_sem_init(&ms->pause_sem, 0); |
87db1a7d | 3490 | qemu_mutex_init(&ms->error_mutex); |
8b0b29dc PX |
3491 | |
3492 | params->tls_hostname = g_strdup(""); | |
3493 | params->tls_creds = g_strdup(""); | |
3494 | ||
3495 | /* Set has_* up only for parameter checks */ | |
3496 | params->has_compress_level = true; | |
3497 | params->has_compress_threads = true; | |
3498 | params->has_decompress_threads = true; | |
3499 | params->has_cpu_throttle_initial = true; | |
3500 | params->has_cpu_throttle_increment = true; | |
3501 | params->has_max_bandwidth = true; | |
3502 | params->has_downtime_limit = true; | |
3503 | params->has_x_checkpoint_delay = true; | |
3504 | params->has_block_incremental = true; | |
cbfd6c95 | 3505 | params->has_multifd_channels = true; |
73af8dd8 | 3506 | params->has_xbzrle_cache_size = true; |
7e555c6c | 3507 | params->has_max_postcopy_bandwidth = true; |
4cbc9c7f | 3508 | params->has_max_cpu_throttle = true; |
ee3d96ba DDAG |
3509 | params->has_announce_initial = true; |
3510 | params->has_announce_max = true; | |
3511 | params->has_announce_rounds = true; | |
3512 | params->has_announce_step = true; | |
b23c2ade PX |
3513 | |
3514 | qemu_sem_init(&ms->postcopy_pause_sem, 0); | |
14b1742e | 3515 | qemu_sem_init(&ms->postcopy_pause_rp_sem, 0); |
edd090c7 | 3516 | qemu_sem_init(&ms->rp_state.rp_sem, 0); |
ad767bed | 3517 | qemu_sem_init(&ms->rate_limit_sem, 0); |
62df066f | 3518 | qemu_mutex_init(&ms->qemu_file_lock); |
8b0b29dc PX |
3519 | } |
3520 | ||
3521 | /* | |
3522 | * Return true if check pass, false otherwise. Error will be put | |
3523 | * inside errp if provided. | |
3524 | */ | |
3525 | static bool migration_object_check(MigrationState *ms, Error **errp) | |
3526 | { | |
6b19a7d9 PX |
3527 | MigrationCapabilityStatusList *head = NULL; |
3528 | /* Assuming all off */ | |
3529 | bool cap_list[MIGRATION_CAPABILITY__MAX] = { 0 }, ret; | |
3530 | int i; | |
3531 | ||
8b0b29dc PX |
3532 | if (!migrate_params_check(&ms->parameters, errp)) { |
3533 | return false; | |
3534 | } | |
3535 | ||
6b19a7d9 PX |
3536 | for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { |
3537 | if (ms->enabled_capabilities[i]) { | |
3538 | head = migrate_cap_add(head, i, true); | |
3539 | } | |
3540 | } | |
3541 | ||
3542 | ret = migrate_caps_check(cap_list, head, errp); | |
3543 | ||
3544 | /* It works with head == NULL */ | |
3545 | qapi_free_MigrationCapabilityStatusList(head); | |
3546 | ||
3547 | return ret; | |
e5cb7e76 PX |
3548 | } |
3549 | ||
3550 | static const TypeInfo migration_type = { | |
3551 | .name = TYPE_MIGRATION, | |
01f6e14c | 3552 | /* |
c8d3ff38 PX |
3553 | * NOTE: TYPE_MIGRATION is not really a device, as the object is |
3554 | * not created using qdev_create(), it is not attached to the qdev | |
3555 | * device tree, and it is never realized. | |
3556 | * | |
3557 | * TODO: Make this TYPE_OBJECT once QOM provides something like | |
3558 | * TYPE_DEVICE's "-global" properties. | |
01f6e14c | 3559 | */ |
e5cb7e76 PX |
3560 | .parent = TYPE_DEVICE, |
3561 | .class_init = migration_class_init, | |
3562 | .class_size = sizeof(MigrationClass), | |
3563 | .instance_size = sizeof(MigrationState), | |
3564 | .instance_init = migration_instance_init, | |
b91bf5e4 | 3565 | .instance_finalize = migration_instance_finalize, |
e5cb7e76 PX |
3566 | }; |
3567 | ||
3568 | static void register_migration_types(void) | |
3569 | { | |
3570 | type_register_static(&migration_type); | |
3571 | } | |
3572 | ||
3573 | type_init(register_migration_types); |