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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" |
b0c3cf94 | 26 | #include "sysemu/cpu-throttle.h" |
e1a3ecee | 27 | #include "rdma.h" |
7b1e1a22 | 28 | #include "ram.h" |
84a899de | 29 | #include "migration/global_state.h" |
c4b63b7c | 30 | #include "migration/misc.h" |
6666c96a | 31 | #include "migration.h" |
20a519a0 | 32 | #include "savevm.h" |
40014d81 | 33 | #include "qemu-file-channel.h" |
08a0aee1 | 34 | #include "qemu-file.h" |
987772d9 | 35 | #include "migration/vmstate.h" |
737e150e | 36 | #include "block/block.h" |
e688df6b | 37 | #include "qapi/error.h" |
9aca82ba | 38 | #include "qapi/clone-visitor.h" |
31e4c354 | 39 | #include "qapi/qapi-visit-migration.h" |
9aca82ba | 40 | #include "qapi/qapi-visit-sockets.h" |
9af23989 MA |
41 | #include "qapi/qapi-commands-migration.h" |
42 | #include "qapi/qapi-events-migration.h" | |
cc7a8ea7 | 43 | #include "qapi/qmp/qerror.h" |
15280c36 | 44 | #include "qapi/qmp/qnull.h" |
ab28bd23 | 45 | #include "qemu/rcu.h" |
2c9e6fec | 46 | #include "block.h" |
be07b0ac | 47 | #include "postcopy-ram.h" |
766bd176 | 48 | #include "qemu/thread.h" |
c09e5bb1 | 49 | #include "trace.h" |
51180423 | 50 | #include "exec/target_page.h" |
61b67d47 | 51 | #include "io/channel-buffer.h" |
35a6ed4f | 52 | #include "migration/colo.h" |
4ffdb337 | 53 | #include "hw/boards.h" |
a27bd6c7 | 54 | #include "hw/qdev-properties.h" |
ce35e229 | 55 | #include "hw/qdev-properties-system.h" |
9d18af93 | 56 | #include "monitor/monitor.h" |
50510ea2 | 57 | #include "net/announce.h" |
c7e0acd5 | 58 | #include "qemu/queue.h" |
d32ca5ad | 59 | #include "multifd.h" |
b5eea99e | 60 | #include "qemu/yank.h" |
6e8c25b4 | 61 | #include "sysemu/cpus.h" |
065e2813 | 62 | |
7590a2ae | 63 | #define MAX_THROTTLE (128 << 20) /* Migration transfer speed throttling */ |
5bb7910a | 64 | |
5b4e1eb7 JQ |
65 | /* Amount of time to allocate to each "chunk" of bandwidth-throttled |
66 | * data. */ | |
67 | #define BUFFER_DELAY 100 | |
68 | #define XFER_LIMIT_RATIO (1000 / BUFFER_DELAY) | |
69 | ||
2ff30257 AA |
70 | /* Time in milliseconds we are allowed to stop the source, |
71 | * for sending the last part */ | |
72 | #define DEFAULT_MIGRATE_SET_DOWNTIME 300 | |
73 | ||
87c9cc1c DHB |
74 | /* Maximum migrate downtime set to 2000 seconds */ |
75 | #define MAX_MIGRATE_DOWNTIME_SECONDS 2000 | |
76 | #define MAX_MIGRATE_DOWNTIME (MAX_MIGRATE_DOWNTIME_SECONDS * 1000) | |
77 | ||
8706d2d5 LL |
78 | /* Default compression thread count */ |
79 | #define DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT 8 | |
3fcb38c2 LL |
80 | /* Default decompression thread count, usually decompression is at |
81 | * least 4 times as fast as compression.*/ | |
82 | #define DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT 2 | |
8706d2d5 LL |
83 | /*0: means nocompress, 1: best speed, ... 9: best compress ratio */ |
84 | #define DEFAULT_MIGRATE_COMPRESS_LEVEL 1 | |
1626fee3 | 85 | /* Define default autoconverge cpu throttle migration parameters */ |
dc14a470 | 86 | #define DEFAULT_MIGRATE_THROTTLE_TRIGGER_THRESHOLD 50 |
d85a31d1 JH |
87 | #define DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL 20 |
88 | #define DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT 10 | |
4cbc9c7f | 89 | #define DEFAULT_MIGRATE_MAX_CPU_THROTTLE 99 |
8706d2d5 | 90 | |
17ad9b35 | 91 | /* Migration XBZRLE default cache size */ |
73af8dd8 | 92 | #define DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE (64 * 1024 * 1024) |
17ad9b35 | 93 | |
131b2153 ZC |
94 | /* The delay time (in ms) between two COLO checkpoints */ |
95 | #define DEFAULT_MIGRATE_X_CHECKPOINT_DELAY (200 * 100) | |
4075fb1c | 96 | #define DEFAULT_MIGRATE_MULTIFD_CHANNELS 2 |
96eef042 | 97 | #define DEFAULT_MIGRATE_MULTIFD_COMPRESSION MULTIFD_COMPRESSION_NONE |
9004db48 JQ |
98 | /* 0: means nocompress, 1: best speed, ... 9: best compress ratio */ |
99 | #define DEFAULT_MIGRATE_MULTIFD_ZLIB_LEVEL 1 | |
6a9ad154 JQ |
100 | /* 0: means nocompress, 1: best speed, ... 20: best compress ratio */ |
101 | #define DEFAULT_MIGRATE_MULTIFD_ZSTD_LEVEL 1 | |
68b53591 | 102 | |
7e555c6c DDAG |
103 | /* Background transfer rate for postcopy, 0 means unlimited, note |
104 | * that page requests can still exceed this limit. | |
105 | */ | |
106 | #define DEFAULT_MIGRATE_MAX_POSTCOPY_BANDWIDTH 0 | |
107 | ||
ee3d96ba DDAG |
108 | /* |
109 | * Parameters for self_announce_delay giving a stream of RARP/ARP | |
110 | * packets after migration. | |
111 | */ | |
112 | #define DEFAULT_MIGRATE_ANNOUNCE_INITIAL 50 | |
113 | #define DEFAULT_MIGRATE_ANNOUNCE_MAX 550 | |
114 | #define DEFAULT_MIGRATE_ANNOUNCE_ROUNDS 5 | |
115 | #define DEFAULT_MIGRATE_ANNOUNCE_STEP 100 | |
116 | ||
99a0db9b GH |
117 | static NotifierList migration_state_notifiers = |
118 | NOTIFIER_LIST_INITIALIZER(migration_state_notifiers); | |
119 | ||
da6f1790 JQ |
120 | /* Messages sent on the return path from destination to source */ |
121 | enum mig_rp_message_type { | |
122 | MIG_RP_MSG_INVALID = 0, /* Must be 0 */ | |
123 | MIG_RP_MSG_SHUT, /* sibling will not send any more RP messages */ | |
124 | MIG_RP_MSG_PONG, /* Response to a PING; data (seq: be32 ) */ | |
125 | ||
126 | MIG_RP_MSG_REQ_PAGES_ID, /* data (start: be64, len: be32, id: string) */ | |
127 | MIG_RP_MSG_REQ_PAGES, /* data (start: be64, len: be32) */ | |
a335debb | 128 | MIG_RP_MSG_RECV_BITMAP, /* send recved_bitmap back to source */ |
13955b89 | 129 | MIG_RP_MSG_RESUME_ACK, /* tell source that we are ready to resume */ |
da6f1790 JQ |
130 | |
131 | MIG_RP_MSG_MAX | |
132 | }; | |
133 | ||
6e8c25b4 AG |
134 | /* Migration capabilities set */ |
135 | struct MigrateCapsSet { | |
136 | int size; /* Capability set size */ | |
137 | MigrationCapability caps[]; /* Variadic array of capabilities */ | |
138 | }; | |
139 | typedef struct MigrateCapsSet MigrateCapsSet; | |
140 | ||
141 | /* Define and initialize MigrateCapsSet */ | |
142 | #define INITIALIZE_MIGRATE_CAPS_SET(_name, ...) \ | |
143 | MigrateCapsSet _name = { \ | |
144 | .size = sizeof((int []) { __VA_ARGS__ }) / sizeof(int), \ | |
145 | .caps = { __VA_ARGS__ } \ | |
146 | } | |
147 | ||
148 | /* Background-snapshot compatibility check list */ | |
149 | static const | |
150 | INITIALIZE_MIGRATE_CAPS_SET(check_caps_background_snapshot, | |
151 | MIGRATION_CAPABILITY_POSTCOPY_RAM, | |
152 | MIGRATION_CAPABILITY_DIRTY_BITMAPS, | |
153 | MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME, | |
154 | MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE, | |
155 | MIGRATION_CAPABILITY_RETURN_PATH, | |
156 | MIGRATION_CAPABILITY_MULTIFD, | |
157 | MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER, | |
158 | MIGRATION_CAPABILITY_AUTO_CONVERGE, | |
159 | MIGRATION_CAPABILITY_RELEASE_RAM, | |
160 | MIGRATION_CAPABILITY_RDMA_PIN_ALL, | |
161 | MIGRATION_CAPABILITY_COMPRESS, | |
162 | MIGRATION_CAPABILITY_XBZRLE, | |
163 | MIGRATION_CAPABILITY_X_COLO, | |
164 | MIGRATION_CAPABILITY_VALIDATE_UUID); | |
165 | ||
17549e84 JQ |
166 | /* When we add fault tolerance, we could have several |
167 | migrations at once. For now we don't need to add | |
168 | dynamic creation of migration */ | |
169 | ||
e5cb7e76 | 170 | static MigrationState *current_migration; |
e1b1b1bc | 171 | static MigrationIncomingState *current_incoming; |
e5cb7e76 | 172 | |
3af8554b DDAG |
173 | static GSList *migration_blockers; |
174 | ||
8b0b29dc | 175 | static bool migration_object_check(MigrationState *ms, Error **errp); |
0331c8ca DDAG |
176 | static int migration_maybe_pause(MigrationState *s, |
177 | int *current_active_state, | |
178 | int new_state); | |
892ae715 | 179 | static void migrate_fd_cancel(MigrationState *s); |
8b0b29dc | 180 | |
8f8bfffc PX |
181 | static gint page_request_addr_cmp(gconstpointer ap, gconstpointer bp) |
182 | { | |
183 | uintptr_t a = (uintptr_t) ap, b = (uintptr_t) bp; | |
184 | ||
185 | return (a > b) - (a < b); | |
186 | } | |
187 | ||
e5cb7e76 PX |
188 | void migration_object_init(void) |
189 | { | |
8b0b29dc | 190 | Error *err = NULL; |
4ffdb337 | 191 | |
e5cb7e76 PX |
192 | /* This can only be called once. */ |
193 | assert(!current_migration); | |
194 | current_migration = MIGRATION_OBJ(object_new(TYPE_MIGRATION)); | |
4ffdb337 | 195 | |
e1b1b1bc PX |
196 | /* |
197 | * Init the migrate incoming object as well no matter whether | |
198 | * we'll use it or not. | |
199 | */ | |
200 | assert(!current_incoming); | |
201 | current_incoming = g_new0(MigrationIncomingState, 1); | |
202 | current_incoming->state = MIGRATION_STATUS_NONE; | |
203 | current_incoming->postcopy_remote_fds = | |
204 | g_array_new(FALSE, TRUE, sizeof(struct PostCopyFD)); | |
205 | qemu_mutex_init(¤t_incoming->rp_mutex); | |
206 | qemu_event_init(¤t_incoming->main_thread_load_event, false); | |
207 | qemu_sem_init(¤t_incoming->postcopy_pause_sem_dst, 0); | |
208 | qemu_sem_init(¤t_incoming->postcopy_pause_sem_fault, 0); | |
8f8bfffc PX |
209 | qemu_mutex_init(¤t_incoming->page_request_mutex); |
210 | current_incoming->page_requested = g_tree_new(page_request_addr_cmp); | |
e1b1b1bc | 211 | |
8b0b29dc PX |
212 | if (!migration_object_check(current_migration, &err)) { |
213 | error_report_err(err); | |
214 | exit(1); | |
215 | } | |
e0d17dfd PB |
216 | |
217 | blk_mig_init(); | |
218 | ram_mig_init(); | |
219 | dirty_bitmap_mig_init(); | |
e5cb7e76 PX |
220 | } |
221 | ||
c7c0e724 DH |
222 | void migration_cancel(void) |
223 | { | |
224 | migrate_fd_cancel(current_migration); | |
225 | } | |
226 | ||
892ae715 | 227 | void migration_shutdown(void) |
1f895604 | 228 | { |
892ae715 DDAG |
229 | /* |
230 | * Cancel the current migration - that will (eventually) | |
231 | * stop the migration using this structure | |
232 | */ | |
c7c0e724 | 233 | migration_cancel(); |
1f895604 | 234 | object_unref(OBJECT(current_migration)); |
1499ab09 VSO |
235 | |
236 | /* | |
237 | * Cancel outgoing migration of dirty bitmaps. It should | |
238 | * at least unref used block nodes. | |
239 | */ | |
240 | dirty_bitmap_mig_cancel_outgoing(); | |
241 | ||
242 | /* | |
243 | * Cancel incoming migration of dirty bitmaps. Dirty bitmaps | |
244 | * are non-critical data, and their loss never considered as | |
245 | * something serious. | |
246 | */ | |
247 | dirty_bitmap_mig_cancel_incoming(); | |
1f895604 VSO |
248 | } |
249 | ||
bca7856a | 250 | /* For outgoing */ |
859bc756 | 251 | MigrationState *migrate_get_current(void) |
17549e84 | 252 | { |
e5cb7e76 PX |
253 | /* This can only be called after the object created. */ |
254 | assert(current_migration); | |
255 | return current_migration; | |
17549e84 JQ |
256 | } |
257 | ||
bca7856a DDAG |
258 | MigrationIncomingState *migration_incoming_get_current(void) |
259 | { | |
e1b1b1bc PX |
260 | assert(current_incoming); |
261 | return current_incoming; | |
bca7856a DDAG |
262 | } |
263 | ||
264 | void migration_incoming_state_destroy(void) | |
265 | { | |
b4b076da JQ |
266 | struct MigrationIncomingState *mis = migration_incoming_get_current(); |
267 | ||
3482655b | 268 | if (mis->to_src_file) { |
660819b1 PX |
269 | /* Tell source that we are done */ |
270 | migrate_send_rp_shut(mis, qemu_file_get_error(mis->from_src_file) != 0); | |
3482655b PX |
271 | qemu_fclose(mis->to_src_file); |
272 | mis->to_src_file = NULL; | |
273 | } | |
274 | ||
660819b1 PX |
275 | if (mis->from_src_file) { |
276 | qemu_fclose(mis->from_src_file); | |
277 | mis->from_src_file = NULL; | |
278 | } | |
00fa4fc8 DDAG |
279 | if (mis->postcopy_remote_fds) { |
280 | g_array_free(mis->postcopy_remote_fds, TRUE); | |
281 | mis->postcopy_remote_fds = NULL; | |
282 | } | |
1df6ddb4 DDAG |
283 | if (mis->transport_cleanup) { |
284 | mis->transport_cleanup(mis->transport_data); | |
285 | } | |
660819b1 | 286 | |
1783c00f DDAG |
287 | qemu_event_reset(&mis->main_thread_load_event); |
288 | ||
8f8bfffc PX |
289 | if (mis->page_requested) { |
290 | g_tree_destroy(mis->page_requested); | |
291 | mis->page_requested = NULL; | |
292 | } | |
293 | ||
9aca82ba JQ |
294 | if (mis->socket_address_list) { |
295 | qapi_free_SocketAddressList(mis->socket_address_list); | |
296 | mis->socket_address_list = NULL; | |
297 | } | |
b5eea99e LS |
298 | |
299 | yank_unregister_instance(MIGRATION_YANK_INSTANCE); | |
bca7856a DDAG |
300 | } |
301 | ||
b05dc723 JQ |
302 | static void migrate_generate_event(int new_state) |
303 | { | |
304 | if (migrate_use_events()) { | |
3ab72385 | 305 | qapi_event_send_migration(new_state); |
b05dc723 JQ |
306 | } |
307 | } | |
308 | ||
0f073f44 DDAG |
309 | static bool migrate_late_block_activate(void) |
310 | { | |
311 | MigrationState *s; | |
312 | ||
313 | s = migrate_get_current(); | |
314 | ||
315 | return s->enabled_capabilities[ | |
316 | MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE]; | |
317 | } | |
318 | ||
da6f1790 JQ |
319 | /* |
320 | * Send a message on the return channel back to the source | |
321 | * of the migration. | |
322 | */ | |
d6208e35 PX |
323 | static int migrate_send_rp_message(MigrationIncomingState *mis, |
324 | enum mig_rp_message_type message_type, | |
325 | uint16_t len, void *data) | |
da6f1790 | 326 | { |
d6208e35 PX |
327 | int ret = 0; |
328 | ||
da6f1790 | 329 | trace_migrate_send_rp_message((int)message_type, len); |
37396950 | 330 | QEMU_LOCK_GUARD(&mis->rp_mutex); |
d6208e35 PX |
331 | |
332 | /* | |
333 | * It's possible that the file handle got lost due to network | |
334 | * failures. | |
335 | */ | |
336 | if (!mis->to_src_file) { | |
337 | ret = -EIO; | |
37396950 | 338 | return ret; |
d6208e35 PX |
339 | } |
340 | ||
da6f1790 JQ |
341 | qemu_put_be16(mis->to_src_file, (unsigned int)message_type); |
342 | qemu_put_be16(mis->to_src_file, len); | |
343 | qemu_put_buffer(mis->to_src_file, data, len); | |
344 | qemu_fflush(mis->to_src_file); | |
d6208e35 PX |
345 | |
346 | /* It's possible that qemu file got error during sending */ | |
347 | ret = qemu_file_get_error(mis->to_src_file); | |
348 | ||
d6208e35 | 349 | return ret; |
da6f1790 JQ |
350 | } |
351 | ||
2e2bce16 PX |
352 | /* Request one page from the source VM at the given start address. |
353 | * rb: the RAMBlock to request the page in | |
1e2d90eb DDAG |
354 | * Start: Address offset within the RB |
355 | * Len: Length in bytes required - must be a multiple of pagesize | |
356 | */ | |
7a267fc4 PX |
357 | int migrate_send_rp_message_req_pages(MigrationIncomingState *mis, |
358 | RAMBlock *rb, ram_addr_t start) | |
1e2d90eb | 359 | { |
cb8d4c8f | 360 | uint8_t bufc[12 + 1 + 255]; /* start (8), len (4), rbname up to 256 */ |
1e2d90eb | 361 | size_t msglen = 12; /* start + len */ |
2e2bce16 | 362 | size_t len = qemu_ram_pagesize(rb); |
d6208e35 | 363 | enum mig_rp_message_type msg_type; |
2e2bce16 PX |
364 | const char *rbname; |
365 | int rbname_len; | |
1e2d90eb DDAG |
366 | |
367 | *(uint64_t *)bufc = cpu_to_be64((uint64_t)start); | |
368 | *(uint32_t *)(bufc + 8) = cpu_to_be32((uint32_t)len); | |
369 | ||
2e2bce16 PX |
370 | /* |
371 | * We maintain the last ramblock that we requested for page. Note that we | |
372 | * don't need locking because this function will only be called within the | |
373 | * postcopy ram fault thread. | |
374 | */ | |
375 | if (rb != mis->last_rb) { | |
376 | mis->last_rb = rb; | |
377 | ||
378 | rbname = qemu_ram_get_idstr(rb); | |
379 | rbname_len = strlen(rbname); | |
380 | ||
1e2d90eb DDAG |
381 | assert(rbname_len < 256); |
382 | ||
383 | bufc[msglen++] = rbname_len; | |
384 | memcpy(bufc + msglen, rbname, rbname_len); | |
385 | msglen += rbname_len; | |
d6208e35 | 386 | msg_type = MIG_RP_MSG_REQ_PAGES_ID; |
1e2d90eb | 387 | } else { |
d6208e35 | 388 | msg_type = MIG_RP_MSG_REQ_PAGES; |
1e2d90eb | 389 | } |
d6208e35 PX |
390 | |
391 | return migrate_send_rp_message(mis, msg_type, msglen, bufc); | |
1e2d90eb DDAG |
392 | } |
393 | ||
7a267fc4 | 394 | int migrate_send_rp_req_pages(MigrationIncomingState *mis, |
8f8bfffc | 395 | RAMBlock *rb, ram_addr_t start, uint64_t haddr) |
7a267fc4 | 396 | { |
8f8bfffc | 397 | void *aligned = (void *)(uintptr_t)(haddr & (-qemu_ram_pagesize(rb))); |
a2429283 | 398 | bool received = false; |
8f8bfffc PX |
399 | |
400 | WITH_QEMU_LOCK_GUARD(&mis->page_request_mutex) { | |
401 | received = ramblock_recv_bitmap_test_byte_offset(rb, start); | |
402 | if (!received && !g_tree_lookup(mis->page_requested, aligned)) { | |
403 | /* | |
404 | * The page has not been received, and it's not yet in the page | |
405 | * request list. Queue it. Set the value of element to 1, so that | |
406 | * things like g_tree_lookup() will return TRUE (1) when found. | |
407 | */ | |
408 | g_tree_insert(mis->page_requested, aligned, (gpointer)1); | |
409 | mis->page_requested_count++; | |
410 | trace_postcopy_page_req_add(aligned, mis->page_requested_count); | |
411 | } | |
412 | } | |
413 | ||
414 | /* | |
415 | * If the page is there, skip sending the message. We don't even need the | |
416 | * lock because as long as the page arrived, it'll be there forever. | |
417 | */ | |
418 | if (received) { | |
419 | return 0; | |
420 | } | |
421 | ||
7a267fc4 PX |
422 | return migrate_send_rp_message_req_pages(mis, rb, start); |
423 | } | |
424 | ||
aad555c2 ZC |
425 | static bool migration_colo_enabled; |
426 | bool migration_incoming_colo_enabled(void) | |
427 | { | |
428 | return migration_colo_enabled; | |
429 | } | |
430 | ||
431 | void migration_incoming_disable_colo(void) | |
432 | { | |
18b1d3c9 | 433 | ram_block_discard_disable(false); |
aad555c2 ZC |
434 | migration_colo_enabled = false; |
435 | } | |
436 | ||
18b1d3c9 | 437 | int migration_incoming_enable_colo(void) |
aad555c2 | 438 | { |
18b1d3c9 DH |
439 | if (ram_block_discard_disable(true)) { |
440 | error_report("COLO: cannot disable RAM discard"); | |
441 | return -EBUSY; | |
442 | } | |
aad555c2 | 443 | migration_colo_enabled = true; |
18b1d3c9 | 444 | return 0; |
aad555c2 ZC |
445 | } |
446 | ||
9aca82ba JQ |
447 | void migrate_add_address(SocketAddress *address) |
448 | { | |
449 | MigrationIncomingState *mis = migration_incoming_get_current(); | |
9aca82ba | 450 | |
54aa3de7 EB |
451 | QAPI_LIST_PREPEND(mis->socket_address_list, |
452 | QAPI_CLONE(SocketAddress, address)); | |
9aca82ba JQ |
453 | } |
454 | ||
e69d50d6 | 455 | static void qemu_start_incoming_migration(const char *uri, Error **errp) |
5bb7910a | 456 | { |
d658f65c | 457 | const char *p = NULL; |
34c9dd8e | 458 | |
b5eea99e LS |
459 | if (!yank_register_instance(MIGRATION_YANK_INSTANCE, errp)) { |
460 | return; | |
461 | } | |
462 | ||
3ab72385 | 463 | qapi_event_send_migration(MIGRATION_STATUS_SETUP); |
e69d50d6 PB |
464 | if (strstart(uri, "tcp:", &p) || |
465 | strstart(uri, "unix:", NULL) || | |
466 | strstart(uri, "vsock:", NULL)) { | |
d658f65c | 467 | socket_start_incoming_migration(p ? p : uri, errp); |
2da776db | 468 | #ifdef CONFIG_RDMA |
adde220a | 469 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
470 | rdma_start_incoming_migration(p, errp); |
471 | #endif | |
adde220a | 472 | } else if (strstart(uri, "exec:", &p)) { |
43eaae28 | 473 | exec_start_incoming_migration(p, errp); |
adde220a | 474 | } else if (strstart(uri, "fd:", &p)) { |
43eaae28 | 475 | fd_start_incoming_migration(p, errp); |
adde220a | 476 | } else { |
b5eea99e | 477 | yank_unregister_instance(MIGRATION_YANK_INSTANCE); |
312fd5f2 | 478 | error_setg(errp, "unknown migration protocol: %s", uri); |
8ca5e801 | 479 | } |
5bb7910a AL |
480 | } |
481 | ||
0aa6aefc DL |
482 | static void process_incoming_migration_bh(void *opaque) |
483 | { | |
484 | Error *local_err = NULL; | |
485 | MigrationIncomingState *mis = opaque; | |
486 | ||
0f073f44 DDAG |
487 | /* If capability late_block_activate is set: |
488 | * Only fire up the block code now if we're going to restart the | |
489 | * VM, else 'cont' will do it. | |
490 | * This causes file locking to happen; so we don't want it to happen | |
491 | * unless we really are starting the VM. | |
492 | */ | |
493 | if (!migrate_late_block_activate() || | |
494 | (autostart && (!global_state_received() || | |
495 | global_state_get_runstate() == RUN_STATE_RUNNING))) { | |
496 | /* Make sure all file formats flush their mutable metadata. | |
497 | * If we get an error here, just don't restart the VM yet. */ | |
498 | bdrv_invalidate_cache_all(&local_err); | |
499 | if (local_err) { | |
500 | error_report_err(local_err); | |
501 | local_err = NULL; | |
502 | autostart = false; | |
503 | } | |
d35ff5e6 KW |
504 | } |
505 | ||
0aa6aefc DL |
506 | /* |
507 | * This must happen after all error conditions are dealt with and | |
508 | * we're sure the VM is going to be running on this host. | |
509 | */ | |
7659505c | 510 | qemu_announce_self(&mis->announce_timer, migrate_announce_params()); |
0aa6aefc | 511 | |
f986c3d2 JQ |
512 | if (multifd_load_cleanup(&local_err) != 0) { |
513 | error_report_err(local_err); | |
514 | autostart = false; | |
515 | } | |
0aa6aefc DL |
516 | /* If global state section was not received or we are in running |
517 | state, we need to obey autostart. Any other state is set with | |
518 | runstate_set. */ | |
519 | ||
b35ebdf0 VSO |
520 | dirty_bitmap_mig_before_vm_start(); |
521 | ||
0aa6aefc DL |
522 | if (!global_state_received() || |
523 | global_state_get_runstate() == RUN_STATE_RUNNING) { | |
524 | if (autostart) { | |
525 | vm_start(); | |
526 | } else { | |
527 | runstate_set(RUN_STATE_PAUSED); | |
528 | } | |
db009729 ZC |
529 | } else if (migration_incoming_colo_enabled()) { |
530 | migration_incoming_disable_colo(); | |
531 | vm_start(); | |
0aa6aefc DL |
532 | } else { |
533 | runstate_set(global_state_get_runstate()); | |
534 | } | |
0aa6aefc DL |
535 | /* |
536 | * This must happen after any state changes since as soon as an external | |
537 | * observer sees this event they might start to prod at the VM assuming | |
538 | * it's ready to use. | |
539 | */ | |
540 | migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, | |
541 | MIGRATION_STATUS_COMPLETED); | |
542 | qemu_bh_delete(mis->bh); | |
543 | migration_incoming_state_destroy(); | |
544 | } | |
545 | ||
82a4da79 | 546 | static void process_incoming_migration_co(void *opaque) |
511c0231 | 547 | { |
b4b076da | 548 | MigrationIncomingState *mis = migration_incoming_get_current(); |
e9bef235 | 549 | PostcopyState ps; |
1c12e1f5 | 550 | int ret; |
8e48ac95 | 551 | Error *local_err = NULL; |
1c12e1f5 | 552 | |
4f0fae7f | 553 | assert(mis->from_src_file); |
92370989 | 554 | mis->migration_incoming_co = qemu_coroutine_self(); |
67f11b5c | 555 | mis->largest_page_size = qemu_ram_pagesize_largest(); |
093e3c42 | 556 | postcopy_state_set(POSTCOPY_INCOMING_NONE); |
93d7af6f HZ |
557 | migrate_set_state(&mis->state, MIGRATION_STATUS_NONE, |
558 | MIGRATION_STATUS_ACTIVE); | |
4f0fae7f | 559 | ret = qemu_loadvm_state(mis->from_src_file); |
bca7856a | 560 | |
e9bef235 DDAG |
561 | ps = postcopy_state_get(); |
562 | trace_process_incoming_migration_co_end(ret, ps); | |
563 | if (ps != POSTCOPY_INCOMING_NONE) { | |
564 | if (ps == POSTCOPY_INCOMING_ADVISE) { | |
565 | /* | |
566 | * Where a migration had postcopy enabled (and thus went to advise) | |
567 | * but managed to complete within the precopy period, we can use | |
568 | * the normal exit. | |
569 | */ | |
570 | postcopy_ram_incoming_cleanup(mis); | |
571 | } else if (ret >= 0) { | |
572 | /* | |
573 | * Postcopy was started, cleanup should happen at the end of the | |
574 | * postcopy thread. | |
575 | */ | |
576 | trace_process_incoming_migration_co_postcopy_end_main(); | |
577 | return; | |
578 | } | |
579 | /* Else if something went wrong then just fall out of the normal exit */ | |
580 | } | |
581 | ||
25d0c16f | 582 | /* we get COLO info, and know if we are in COLO mode */ |
aad555c2 | 583 | if (!ret && migration_incoming_colo_enabled()) { |
8e48ac95 ZC |
584 | /* Make sure all file formats flush their mutable metadata */ |
585 | bdrv_invalidate_cache_all(&local_err); | |
586 | if (local_err) { | |
8e48ac95 | 587 | error_report_err(local_err); |
6d99c2d4 | 588 | goto fail; |
8e48ac95 ZC |
589 | } |
590 | ||
25d0c16f HZ |
591 | qemu_thread_create(&mis->colo_incoming_thread, "COLO incoming", |
592 | colo_process_incoming_thread, mis, QEMU_THREAD_JOINABLE); | |
593 | mis->have_colo_incoming_thread = true; | |
594 | qemu_coroutine_yield(); | |
595 | ||
596 | /* Wait checkpoint incoming thread exit before free resource */ | |
597 | qemu_thread_join(&mis->colo_incoming_thread); | |
13af18f2 ZC |
598 | /* We hold the global iothread lock, so it is safe here */ |
599 | colo_release_ram_cache(); | |
25d0c16f HZ |
600 | } |
601 | ||
1c12e1f5 | 602 | if (ret < 0) { |
db80face | 603 | error_report("load of migration failed: %s", strerror(-ret)); |
6d99c2d4 | 604 | goto fail; |
511c0231 | 605 | } |
0aa6aefc DL |
606 | mis->bh = qemu_bh_new(process_incoming_migration_bh, mis); |
607 | qemu_bh_schedule(mis->bh); | |
92370989 | 608 | mis->migration_incoming_co = NULL; |
6d99c2d4 FL |
609 | return; |
610 | fail: | |
611 | local_err = NULL; | |
612 | migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, | |
613 | MIGRATION_STATUS_FAILED); | |
614 | qemu_fclose(mis->from_src_file); | |
615 | if (multifd_load_cleanup(&local_err) != 0) { | |
616 | error_report_err(local_err); | |
617 | } | |
618 | exit(EXIT_FAILURE); | |
511c0231 JQ |
619 | } |
620 | ||
b673eab4 JQ |
621 | /** |
622 | * @migration_incoming_setup: Setup incoming migration | |
623 | * | |
624 | * Returns 0 for no error or 1 for error | |
625 | * | |
626 | * @f: file for main migration channel | |
627 | * @errp: where to put errors | |
628 | */ | |
629 | static int migration_incoming_setup(QEMUFile *f, Error **errp) | |
82a4da79 | 630 | { |
4f0fae7f | 631 | MigrationIncomingState *mis = migration_incoming_get_current(); |
b673eab4 | 632 | Error *local_err = NULL; |
82a4da79 | 633 | |
b673eab4 | 634 | if (multifd_load_setup(&local_err) != 0) { |
f986c3d2 JQ |
635 | /* We haven't been able to create multifd threads |
636 | nothing better to do */ | |
b673eab4 | 637 | error_report_err(local_err); |
f986c3d2 JQ |
638 | exit(EXIT_FAILURE); |
639 | } | |
640 | ||
4f0fae7f JQ |
641 | if (!mis->from_src_file) { |
642 | mis->from_src_file = f; | |
643 | } | |
06ad5135 | 644 | qemu_file_set_blocking(f, false); |
b673eab4 | 645 | return 0; |
e595a01a JQ |
646 | } |
647 | ||
36c2f8be | 648 | void migration_incoming_process(void) |
e595a01a JQ |
649 | { |
650 | Coroutine *co = qemu_coroutine_create(process_incoming_migration_co, NULL); | |
0b8b8753 | 651 | qemu_coroutine_enter(co); |
82a4da79 PB |
652 | } |
653 | ||
884835fa PX |
654 | /* Returns true if recovered from a paused migration, otherwise false */ |
655 | static bool postcopy_try_recover(QEMUFile *f) | |
e595a01a | 656 | { |
d96c9e8d PX |
657 | MigrationIncomingState *mis = migration_incoming_get_current(); |
658 | ||
659 | if (mis->state == MIGRATION_STATUS_POSTCOPY_PAUSED) { | |
660 | /* Resumed from a paused postcopy migration */ | |
661 | ||
662 | mis->from_src_file = f; | |
663 | /* Postcopy has standalone thread to do vm load */ | |
664 | qemu_file_set_blocking(f, true); | |
665 | ||
666 | /* Re-configure the return path */ | |
667 | mis->to_src_file = qemu_file_get_return_path(f); | |
668 | ||
669 | migrate_set_state(&mis->state, MIGRATION_STATUS_POSTCOPY_PAUSED, | |
670 | MIGRATION_STATUS_POSTCOPY_RECOVER); | |
671 | ||
672 | /* | |
673 | * Here, we only wake up the main loading thread (while the | |
674 | * fault thread will still be waiting), so that we can receive | |
675 | * commands from source now, and answer it if needed. The | |
676 | * fault thread will be woken up afterwards until we are sure | |
677 | * that source is ready to reply to page requests. | |
678 | */ | |
679 | qemu_sem_post(&mis->postcopy_pause_sem_dst); | |
884835fa PX |
680 | return true; |
681 | } | |
682 | ||
683 | return false; | |
684 | } | |
685 | ||
b673eab4 | 686 | void migration_fd_process_incoming(QEMUFile *f, Error **errp) |
884835fa | 687 | { |
b673eab4 JQ |
688 | Error *local_err = NULL; |
689 | ||
884835fa PX |
690 | if (postcopy_try_recover(f)) { |
691 | return; | |
d96c9e8d | 692 | } |
884835fa | 693 | |
b673eab4 | 694 | if (migration_incoming_setup(f, &local_err)) { |
2155ceaf | 695 | error_propagate(errp, local_err); |
b673eab4 JQ |
696 | return; |
697 | } | |
884835fa | 698 | migration_incoming_process(); |
e595a01a JQ |
699 | } |
700 | ||
49ed0d24 | 701 | void migration_ioc_process_incoming(QIOChannel *ioc, Error **errp) |
4f0fae7f JQ |
702 | { |
703 | MigrationIncomingState *mis = migration_incoming_get_current(); | |
b673eab4 | 704 | Error *local_err = NULL; |
a429e7f4 | 705 | bool start_migration; |
4f0fae7f JQ |
706 | |
707 | if (!mis->from_src_file) { | |
a429e7f4 | 708 | /* The first connection (multifd may have multiple) */ |
4f0fae7f | 709 | QEMUFile *f = qemu_fopen_channel_input(ioc); |
a429e7f4 PX |
710 | |
711 | /* If it's a recovery, we're done */ | |
884835fa PX |
712 | if (postcopy_try_recover(f)) { |
713 | return; | |
714 | } | |
a429e7f4 | 715 | |
b673eab4 | 716 | if (migration_incoming_setup(f, &local_err)) { |
2155ceaf | 717 | error_propagate(errp, local_err); |
b673eab4 JQ |
718 | return; |
719 | } | |
a429e7f4 PX |
720 | |
721 | /* | |
722 | * Common migration only needs one channel, so we can start | |
723 | * right now. Multifd needs more than one channel, we wait. | |
724 | */ | |
725 | start_migration = !migrate_use_multifd(); | |
726 | } else { | |
727 | /* Multiple connections */ | |
728 | assert(migrate_use_multifd()); | |
49ed0d24 FL |
729 | start_migration = multifd_recv_new_channel(ioc, &local_err); |
730 | if (local_err) { | |
731 | error_propagate(errp, local_err); | |
732 | return; | |
733 | } | |
4f0fae7f | 734 | } |
81e62053 | 735 | |
a429e7f4 | 736 | if (start_migration) { |
81e62053 PX |
737 | migration_incoming_process(); |
738 | } | |
4f0fae7f JQ |
739 | } |
740 | ||
428d8908 JQ |
741 | /** |
742 | * @migration_has_all_channels: We have received all channels that we need | |
743 | * | |
744 | * Returns true when we have got connections to all the channels that | |
745 | * we need for migration. | |
746 | */ | |
747 | bool migration_has_all_channels(void) | |
748 | { | |
ca273df3 | 749 | MigrationIncomingState *mis = migration_incoming_get_current(); |
62c1e0ca JQ |
750 | bool all_channels; |
751 | ||
752 | all_channels = multifd_recv_all_channels_created(); | |
753 | ||
ca273df3 | 754 | return all_channels && mis->from_src_file != NULL; |
428d8908 JQ |
755 | } |
756 | ||
6decec93 DDAG |
757 | /* |
758 | * Send a 'SHUT' message on the return channel with the given value | |
759 | * to indicate that we've finished with the RP. Non-0 value indicates | |
760 | * error. | |
761 | */ | |
762 | void migrate_send_rp_shut(MigrationIncomingState *mis, | |
763 | uint32_t value) | |
764 | { | |
765 | uint32_t buf; | |
766 | ||
767 | buf = cpu_to_be32(value); | |
768 | migrate_send_rp_message(mis, MIG_RP_MSG_SHUT, sizeof(buf), &buf); | |
769 | } | |
770 | ||
771 | /* | |
772 | * Send a 'PONG' message on the return channel with the given value | |
773 | * (normally in response to a 'PING') | |
774 | */ | |
775 | void migrate_send_rp_pong(MigrationIncomingState *mis, | |
776 | uint32_t value) | |
777 | { | |
778 | uint32_t buf; | |
779 | ||
780 | buf = cpu_to_be32(value); | |
781 | migrate_send_rp_message(mis, MIG_RP_MSG_PONG, sizeof(buf), &buf); | |
782 | } | |
783 | ||
a335debb PX |
784 | void migrate_send_rp_recv_bitmap(MigrationIncomingState *mis, |
785 | char *block_name) | |
786 | { | |
787 | char buf[512]; | |
788 | int len; | |
789 | int64_t res; | |
790 | ||
791 | /* | |
792 | * First, we send the header part. It contains only the len of | |
793 | * idstr, and the idstr itself. | |
794 | */ | |
795 | len = strlen(block_name); | |
796 | buf[0] = len; | |
797 | memcpy(buf + 1, block_name, len); | |
798 | ||
799 | if (mis->state != MIGRATION_STATUS_POSTCOPY_RECOVER) { | |
800 | error_report("%s: MSG_RP_RECV_BITMAP only used for recovery", | |
801 | __func__); | |
802 | return; | |
803 | } | |
804 | ||
805 | migrate_send_rp_message(mis, MIG_RP_MSG_RECV_BITMAP, len + 1, buf); | |
806 | ||
807 | /* | |
808 | * Next, we dump the received bitmap to the stream. | |
809 | * | |
810 | * TODO: currently we are safe since we are the only one that is | |
811 | * using the to_src_file handle (fault thread is still paused), | |
812 | * and it's ok even not taking the mutex. However the best way is | |
813 | * to take the lock before sending the message header, and release | |
814 | * the lock after sending the bitmap. | |
815 | */ | |
816 | qemu_mutex_lock(&mis->rp_mutex); | |
817 | res = ramblock_recv_bitmap_send(mis->to_src_file, block_name); | |
818 | qemu_mutex_unlock(&mis->rp_mutex); | |
819 | ||
820 | trace_migrate_send_rp_recv_bitmap(block_name, res); | |
821 | } | |
822 | ||
13955b89 PX |
823 | void migrate_send_rp_resume_ack(MigrationIncomingState *mis, uint32_t value) |
824 | { | |
825 | uint32_t buf; | |
826 | ||
827 | buf = cpu_to_be32(value); | |
828 | migrate_send_rp_message(mis, MIG_RP_MSG_RESUME_ACK, sizeof(buf), &buf); | |
829 | } | |
830 | ||
bbf6da32 OW |
831 | MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) |
832 | { | |
95b3a8c8 EB |
833 | MigrationCapabilityStatusList *head = NULL, **tail = &head; |
834 | MigrationCapabilityStatus *caps; | |
bbf6da32 OW |
835 | MigrationState *s = migrate_get_current(); |
836 | int i; | |
837 | ||
7fb1cf16 | 838 | for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { |
ed1701c6 DDAG |
839 | #ifndef CONFIG_LIVE_BLOCK_MIGRATION |
840 | if (i == MIGRATION_CAPABILITY_BLOCK) { | |
841 | continue; | |
842 | } | |
843 | #endif | |
95b3a8c8 EB |
844 | caps = g_malloc0(sizeof(*caps)); |
845 | caps->capability = i; | |
846 | caps->state = s->enabled_capabilities[i]; | |
847 | QAPI_LIST_APPEND(tail, caps); | |
bbf6da32 OW |
848 | } |
849 | ||
850 | return head; | |
851 | } | |
852 | ||
85de8323 LL |
853 | MigrationParameters *qmp_query_migrate_parameters(Error **errp) |
854 | { | |
855 | MigrationParameters *params; | |
856 | MigrationState *s = migrate_get_current(); | |
857 | ||
e87fae4c | 858 | /* TODO use QAPI_CLONE() instead of duplicating it inline */ |
85de8323 | 859 | params = g_malloc0(sizeof(*params)); |
de63ab61 | 860 | params->has_compress_level = true; |
2594f56d | 861 | params->compress_level = s->parameters.compress_level; |
de63ab61 | 862 | params->has_compress_threads = true; |
2594f56d | 863 | params->compress_threads = s->parameters.compress_threads; |
1d58872a XG |
864 | params->has_compress_wait_thread = true; |
865 | params->compress_wait_thread = s->parameters.compress_wait_thread; | |
de63ab61 | 866 | params->has_decompress_threads = true; |
2594f56d | 867 | params->decompress_threads = s->parameters.decompress_threads; |
dc14a470 KZ |
868 | params->has_throttle_trigger_threshold = true; |
869 | params->throttle_trigger_threshold = s->parameters.throttle_trigger_threshold; | |
de63ab61 | 870 | params->has_cpu_throttle_initial = true; |
2594f56d | 871 | params->cpu_throttle_initial = s->parameters.cpu_throttle_initial; |
de63ab61 | 872 | params->has_cpu_throttle_increment = true; |
2594f56d | 873 | params->cpu_throttle_increment = s->parameters.cpu_throttle_increment; |
cbbf8182 KZ |
874 | params->has_cpu_throttle_tailslow = true; |
875 | params->cpu_throttle_tailslow = s->parameters.cpu_throttle_tailslow; | |
8cc99dcd | 876 | params->has_tls_creds = true; |
69ef1f36 | 877 | params->tls_creds = g_strdup(s->parameters.tls_creds); |
8cc99dcd | 878 | params->has_tls_hostname = true; |
69ef1f36 | 879 | params->tls_hostname = g_strdup(s->parameters.tls_hostname); |
d2f1d29b | 880 | params->has_tls_authz = true; |
7cd75cbd MZ |
881 | params->tls_authz = g_strdup(s->parameters.tls_authz ? |
882 | s->parameters.tls_authz : ""); | |
2ff30257 AA |
883 | params->has_max_bandwidth = true; |
884 | params->max_bandwidth = s->parameters.max_bandwidth; | |
885 | params->has_downtime_limit = true; | |
886 | params->downtime_limit = s->parameters.downtime_limit; | |
fe39a4d4 | 887 | params->has_x_checkpoint_delay = true; |
68b53591 | 888 | params->x_checkpoint_delay = s->parameters.x_checkpoint_delay; |
2833c59b JQ |
889 | params->has_block_incremental = true; |
890 | params->block_incremental = s->parameters.block_incremental; | |
cbfd6c95 JQ |
891 | params->has_multifd_channels = true; |
892 | params->multifd_channels = s->parameters.multifd_channels; | |
96eef042 JQ |
893 | params->has_multifd_compression = true; |
894 | params->multifd_compression = s->parameters.multifd_compression; | |
9004db48 JQ |
895 | params->has_multifd_zlib_level = true; |
896 | params->multifd_zlib_level = s->parameters.multifd_zlib_level; | |
6a9ad154 JQ |
897 | params->has_multifd_zstd_level = true; |
898 | params->multifd_zstd_level = s->parameters.multifd_zstd_level; | |
73af8dd8 JQ |
899 | params->has_xbzrle_cache_size = true; |
900 | params->xbzrle_cache_size = s->parameters.xbzrle_cache_size; | |
7e555c6c DDAG |
901 | params->has_max_postcopy_bandwidth = true; |
902 | params->max_postcopy_bandwidth = s->parameters.max_postcopy_bandwidth; | |
4cbc9c7f LQ |
903 | params->has_max_cpu_throttle = true; |
904 | params->max_cpu_throttle = s->parameters.max_cpu_throttle; | |
ee3d96ba DDAG |
905 | params->has_announce_initial = true; |
906 | params->announce_initial = s->parameters.announce_initial; | |
907 | params->has_announce_max = true; | |
908 | params->announce_max = s->parameters.announce_max; | |
909 | params->has_announce_rounds = true; | |
910 | params->announce_rounds = s->parameters.announce_rounds; | |
911 | params->has_announce_step = true; | |
912 | params->announce_step = s->parameters.announce_step; | |
85de8323 | 913 | |
31e4c354 HR |
914 | if (s->parameters.has_block_bitmap_mapping) { |
915 | params->has_block_bitmap_mapping = true; | |
916 | params->block_bitmap_mapping = | |
917 | QAPI_CLONE(BitmapMigrationNodeAliasList, | |
918 | s->parameters.block_bitmap_mapping); | |
919 | } | |
920 | ||
85de8323 LL |
921 | return params; |
922 | } | |
923 | ||
ee3d96ba DDAG |
924 | AnnounceParameters *migrate_announce_params(void) |
925 | { | |
926 | static AnnounceParameters ap; | |
927 | ||
928 | MigrationState *s = migrate_get_current(); | |
929 | ||
930 | ap.initial = s->parameters.announce_initial; | |
931 | ap.max = s->parameters.announce_max; | |
932 | ap.rounds = s->parameters.announce_rounds; | |
933 | ap.step = s->parameters.announce_step; | |
934 | ||
935 | return ≈ | |
936 | } | |
937 | ||
f6844b99 DDAG |
938 | /* |
939 | * Return true if we're already in the middle of a migration | |
940 | * (i.e. any of the active or setup states) | |
941 | */ | |
3d63da16 | 942 | bool migration_is_setup_or_active(int state) |
f6844b99 DDAG |
943 | { |
944 | switch (state) { | |
945 | case MIGRATION_STATUS_ACTIVE: | |
9ec055ae | 946 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: |
a688d2c1 | 947 | case MIGRATION_STATUS_POSTCOPY_PAUSED: |
135b87b4 | 948 | case MIGRATION_STATUS_POSTCOPY_RECOVER: |
f6844b99 | 949 | case MIGRATION_STATUS_SETUP: |
31e06077 DDAG |
950 | case MIGRATION_STATUS_PRE_SWITCHOVER: |
951 | case MIGRATION_STATUS_DEVICE: | |
c7e0acd5 | 952 | case MIGRATION_STATUS_WAIT_UNPLUG: |
19dd408a | 953 | case MIGRATION_STATUS_COLO: |
f6844b99 DDAG |
954 | return true; |
955 | ||
956 | default: | |
957 | return false; | |
958 | ||
959 | } | |
960 | } | |
961 | ||
392d87e2 JQ |
962 | bool migration_is_running(int state) |
963 | { | |
964 | switch (state) { | |
965 | case MIGRATION_STATUS_ACTIVE: | |
966 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: | |
967 | case MIGRATION_STATUS_POSTCOPY_PAUSED: | |
968 | case MIGRATION_STATUS_POSTCOPY_RECOVER: | |
969 | case MIGRATION_STATUS_SETUP: | |
970 | case MIGRATION_STATUS_PRE_SWITCHOVER: | |
971 | case MIGRATION_STATUS_DEVICE: | |
972 | case MIGRATION_STATUS_WAIT_UNPLUG: | |
973 | case MIGRATION_STATUS_CANCELLING: | |
392d87e2 JQ |
974 | return true; |
975 | ||
976 | default: | |
977 | return false; | |
978 | ||
979 | } | |
980 | } | |
981 | ||
640dfb14 WY |
982 | static void populate_time_info(MigrationInfo *info, MigrationState *s) |
983 | { | |
984 | info->has_status = true; | |
985 | info->has_setup_time = true; | |
986 | info->setup_time = s->setup_time; | |
987 | if (s->state == MIGRATION_STATUS_COMPLETED) { | |
988 | info->has_total_time = true; | |
989 | info->total_time = s->total_time; | |
990 | info->has_downtime = true; | |
991 | info->downtime = s->downtime; | |
992 | } else { | |
993 | info->has_total_time = true; | |
994 | info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) - | |
995 | s->start_time; | |
996 | info->has_expected_downtime = true; | |
997 | info->expected_downtime = s->expected_downtime; | |
998 | } | |
999 | } | |
1000 | ||
a22463a5 DDAG |
1001 | static void populate_ram_info(MigrationInfo *info, MigrationState *s) |
1002 | { | |
1003 | info->has_ram = true; | |
1004 | info->ram = g_malloc0(sizeof(*info->ram)); | |
9360447d | 1005 | info->ram->transferred = ram_counters.transferred; |
a22463a5 | 1006 | info->ram->total = ram_bytes_total(); |
9360447d | 1007 | info->ram->duplicate = ram_counters.duplicate; |
bedf53c1 JQ |
1008 | /* legacy value. It is not used anymore */ |
1009 | info->ram->skipped = 0; | |
9360447d JQ |
1010 | info->ram->normal = ram_counters.normal; |
1011 | info->ram->normal_bytes = ram_counters.normal * | |
20afaed9 | 1012 | qemu_target_page_size(); |
a22463a5 | 1013 | info->ram->mbps = s->mbps; |
9360447d JQ |
1014 | info->ram->dirty_sync_count = ram_counters.dirty_sync_count; |
1015 | info->ram->postcopy_requests = ram_counters.postcopy_requests; | |
030ce1f8 | 1016 | info->ram->page_size = qemu_target_page_size(); |
a61c45bd | 1017 | info->ram->multifd_bytes = ram_counters.multifd_bytes; |
aecbfe9c | 1018 | info->ram->pages_per_second = s->pages_per_second; |
a22463a5 | 1019 | |
114f5aee JQ |
1020 | if (migrate_use_xbzrle()) { |
1021 | info->has_xbzrle_cache = true; | |
1022 | info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache)); | |
1023 | info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size(); | |
9360447d JQ |
1024 | info->xbzrle_cache->bytes = xbzrle_counters.bytes; |
1025 | info->xbzrle_cache->pages = xbzrle_counters.pages; | |
1026 | info->xbzrle_cache->cache_miss = xbzrle_counters.cache_miss; | |
1027 | info->xbzrle_cache->cache_miss_rate = xbzrle_counters.cache_miss_rate; | |
e460a4b1 | 1028 | info->xbzrle_cache->encoding_rate = xbzrle_counters.encoding_rate; |
9360447d | 1029 | info->xbzrle_cache->overflow = xbzrle_counters.overflow; |
114f5aee JQ |
1030 | } |
1031 | ||
76e03000 XG |
1032 | if (migrate_use_compression()) { |
1033 | info->has_compression = true; | |
1034 | info->compression = g_malloc0(sizeof(*info->compression)); | |
1035 | info->compression->pages = compression_counters.pages; | |
1036 | info->compression->busy = compression_counters.busy; | |
1037 | info->compression->busy_rate = compression_counters.busy_rate; | |
1038 | info->compression->compressed_size = | |
1039 | compression_counters.compressed_size; | |
1040 | info->compression->compression_rate = | |
1041 | compression_counters.compression_rate; | |
1042 | } | |
1043 | ||
338182c8 JQ |
1044 | if (cpu_throttle_active()) { |
1045 | info->has_cpu_throttle_percentage = true; | |
1046 | info->cpu_throttle_percentage = cpu_throttle_get_percentage(); | |
1047 | } | |
1048 | ||
a22463a5 DDAG |
1049 | if (s->state != MIGRATION_STATUS_COMPLETED) { |
1050 | info->ram->remaining = ram_bytes_remaining(); | |
9360447d | 1051 | info->ram->dirty_pages_rate = ram_counters.dirty_pages_rate; |
a22463a5 DDAG |
1052 | } |
1053 | } | |
1054 | ||
930ac04c JQ |
1055 | static void populate_disk_info(MigrationInfo *info) |
1056 | { | |
1057 | if (blk_mig_active()) { | |
1058 | info->has_disk = true; | |
1059 | info->disk = g_malloc0(sizeof(*info->disk)); | |
1060 | info->disk->transferred = blk_mig_bytes_transferred(); | |
1061 | info->disk->remaining = blk_mig_bytes_remaining(); | |
1062 | info->disk->total = blk_mig_bytes_total(); | |
1063 | } | |
1064 | } | |
1065 | ||
65ace060 | 1066 | static void fill_source_migration_info(MigrationInfo *info) |
5bb7910a | 1067 | { |
17549e84 | 1068 | MigrationState *s = migrate_get_current(); |
372043f3 | 1069 | GSList *cur_blocker = migration_blockers; |
17549e84 | 1070 | |
3af8554b | 1071 | info->blocked_reasons = NULL; |
3af8554b | 1072 | |
372043f3 MA |
1073 | /* |
1074 | * There are two types of reasons a migration might be blocked; | |
1075 | * a) devices marked in VMState as non-migratable, and | |
1076 | * b) Explicit migration blockers | |
1077 | * We need to add both of them here. | |
1078 | */ | |
1079 | qemu_savevm_non_migratable_list(&info->blocked_reasons); | |
3af8554b | 1080 | |
372043f3 MA |
1081 | while (cur_blocker) { |
1082 | QAPI_LIST_PREPEND(info->blocked_reasons, | |
1083 | g_strdup(error_get_pretty(cur_blocker->data))); | |
1084 | cur_blocker = g_slist_next(cur_blocker); | |
3af8554b | 1085 | } |
372043f3 | 1086 | info->has_blocked_reasons = info->blocked_reasons != NULL; |
3af8554b | 1087 | |
17549e84 | 1088 | switch (s->state) { |
31194731 | 1089 | case MIGRATION_STATUS_NONE: |
17549e84 | 1090 | /* no migration has happened ever */ |
65ace060 AP |
1091 | /* do not overwrite destination migration status */ |
1092 | return; | |
31194731 | 1093 | case MIGRATION_STATUS_SETUP: |
29ae8a41 | 1094 | info->has_status = true; |
ed4fbd10 | 1095 | info->has_total_time = false; |
29ae8a41 | 1096 | break; |
31194731 HZ |
1097 | case MIGRATION_STATUS_ACTIVE: |
1098 | case MIGRATION_STATUS_CANCELLING: | |
9ec055ae | 1099 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: |
31e06077 DDAG |
1100 | case MIGRATION_STATUS_PRE_SWITCHOVER: |
1101 | case MIGRATION_STATUS_DEVICE: | |
a688d2c1 | 1102 | case MIGRATION_STATUS_POSTCOPY_PAUSED: |
135b87b4 | 1103 | case MIGRATION_STATUS_POSTCOPY_RECOVER: |
640dfb14 WY |
1104 | /* TODO add some postcopy stats */ |
1105 | populate_time_info(info, s); | |
a22463a5 | 1106 | populate_ram_info(info, s); |
930ac04c | 1107 | populate_disk_info(info); |
3710586c | 1108 | populate_vfio_info(info); |
17549e84 | 1109 | break; |
0b827d5e HZ |
1110 | case MIGRATION_STATUS_COLO: |
1111 | info->has_status = true; | |
1112 | /* TODO: display COLO specific information (checkpoint info etc.) */ | |
1113 | break; | |
31194731 | 1114 | case MIGRATION_STATUS_COMPLETED: |
640dfb14 | 1115 | populate_time_info(info, s); |
a22463a5 | 1116 | populate_ram_info(info, s); |
3710586c | 1117 | populate_vfio_info(info); |
17549e84 | 1118 | break; |
31194731 | 1119 | case MIGRATION_STATUS_FAILED: |
791e7c82 | 1120 | info->has_status = true; |
d59ce6f3 DB |
1121 | if (s->error) { |
1122 | info->has_error_desc = true; | |
1123 | info->error_desc = g_strdup(error_get_pretty(s->error)); | |
1124 | } | |
17549e84 | 1125 | break; |
31194731 | 1126 | case MIGRATION_STATUS_CANCELLED: |
791e7c82 | 1127 | info->has_status = true; |
17549e84 | 1128 | break; |
c7e0acd5 JF |
1129 | case MIGRATION_STATUS_WAIT_UNPLUG: |
1130 | info->has_status = true; | |
1131 | break; | |
5bb7910a | 1132 | } |
cde63fbe | 1133 | info->status = s->state; |
5bb7910a AL |
1134 | } |
1135 | ||
6e8c25b4 AG |
1136 | typedef enum WriteTrackingSupport { |
1137 | WT_SUPPORT_UNKNOWN = 0, | |
1138 | WT_SUPPORT_ABSENT, | |
1139 | WT_SUPPORT_AVAILABLE, | |
1140 | WT_SUPPORT_COMPATIBLE | |
1141 | } WriteTrackingSupport; | |
1142 | ||
1143 | static | |
1144 | WriteTrackingSupport migrate_query_write_tracking(void) | |
1145 | { | |
1146 | /* Check if kernel supports required UFFD features */ | |
1147 | if (!ram_write_tracking_available()) { | |
1148 | return WT_SUPPORT_ABSENT; | |
1149 | } | |
1150 | /* | |
1151 | * Check if current memory configuration is | |
1152 | * compatible with required UFFD features. | |
1153 | */ | |
1154 | if (!ram_write_tracking_compatible()) { | |
1155 | return WT_SUPPORT_AVAILABLE; | |
1156 | } | |
1157 | ||
1158 | return WT_SUPPORT_COMPATIBLE; | |
1159 | } | |
1160 | ||
4a84214e PX |
1161 | /** |
1162 | * @migration_caps_check - check capability validity | |
1163 | * | |
1164 | * @cap_list: old capability list, array of bool | |
1165 | * @params: new capabilities to be applied soon | |
1166 | * @errp: set *errp if the check failed, with reason | |
1167 | * | |
1168 | * Returns true if check passed, otherwise false. | |
1169 | */ | |
1170 | static bool migrate_caps_check(bool *cap_list, | |
1171 | MigrationCapabilityStatusList *params, | |
1172 | Error **errp) | |
00458433 | 1173 | { |
00458433 | 1174 | MigrationCapabilityStatusList *cap; |
4a84214e | 1175 | bool old_postcopy_cap; |
d7651f15 | 1176 | MigrationIncomingState *mis = migration_incoming_get_current(); |
00458433 | 1177 | |
4a84214e | 1178 | old_postcopy_cap = cap_list[MIGRATION_CAPABILITY_POSTCOPY_RAM]; |
00458433 OW |
1179 | |
1180 | for (cap = params; cap; cap = cap->next) { | |
4a84214e PX |
1181 | cap_list[cap->value->capability] = cap->value->state; |
1182 | } | |
1183 | ||
ed1701c6 | 1184 | #ifndef CONFIG_LIVE_BLOCK_MIGRATION |
4a84214e PX |
1185 | if (cap_list[MIGRATION_CAPABILITY_BLOCK]) { |
1186 | error_setg(errp, "QEMU compiled without old-style (blk/-b, inc/-i) " | |
1187 | "block migration"); | |
1188 | error_append_hint(errp, "Use drive_mirror+NBD instead.\n"); | |
1189 | return false; | |
00458433 | 1190 | } |
4a84214e | 1191 | #endif |
53dd370c | 1192 | |
7e934f5b ZC |
1193 | #ifndef CONFIG_REPLICATION |
1194 | if (cap_list[MIGRATION_CAPABILITY_X_COLO]) { | |
1195 | error_setg(errp, "QEMU compiled without replication module" | |
1196 | " can't enable COLO"); | |
1197 | error_append_hint(errp, "Please enable replication before COLO.\n"); | |
1198 | return false; | |
1199 | } | |
1200 | #endif | |
1201 | ||
4a84214e | 1202 | if (cap_list[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { |
096631bd DDAG |
1203 | /* This check is reasonably expensive, so only when it's being |
1204 | * set the first time, also it's only the destination that needs | |
1205 | * special support. | |
1206 | */ | |
1207 | if (!old_postcopy_cap && runstate_check(RUN_STATE_INMIGRATE) && | |
d7651f15 | 1208 | !postcopy_ram_supported_by_host(mis)) { |
096631bd DDAG |
1209 | /* postcopy_ram_supported_by_host will have emitted a more |
1210 | * detailed message | |
1211 | */ | |
4a84214e PX |
1212 | error_setg(errp, "Postcopy is not supported"); |
1213 | return false; | |
096631bd | 1214 | } |
18269069 YK |
1215 | |
1216 | if (cap_list[MIGRATION_CAPABILITY_X_IGNORE_SHARED]) { | |
1217 | error_setg(errp, "Postcopy is not compatible with ignore-shared"); | |
1218 | return false; | |
1219 | } | |
53dd370c | 1220 | } |
4a84214e | 1221 | |
6e8c25b4 AG |
1222 | if (cap_list[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]) { |
1223 | WriteTrackingSupport wt_support; | |
1224 | int idx; | |
1225 | /* | |
1226 | * Check if 'background-snapshot' capability is supported by | |
1227 | * host kernel and compatible with guest memory configuration. | |
1228 | */ | |
1229 | wt_support = migrate_query_write_tracking(); | |
1230 | if (wt_support < WT_SUPPORT_AVAILABLE) { | |
1231 | error_setg(errp, "Background-snapshot is not supported by host kernel"); | |
1232 | return false; | |
1233 | } | |
1234 | if (wt_support < WT_SUPPORT_COMPATIBLE) { | |
1235 | error_setg(errp, "Background-snapshot is not compatible " | |
1236 | "with guest memory configuration"); | |
1237 | return false; | |
1238 | } | |
1239 | ||
1240 | /* | |
1241 | * Check if there are any migration capabilities | |
1242 | * incompatible with 'background-snapshot'. | |
1243 | */ | |
1244 | for (idx = 0; idx < check_caps_background_snapshot.size; idx++) { | |
1245 | int incomp_cap = check_caps_background_snapshot.caps[idx]; | |
1246 | if (cap_list[incomp_cap]) { | |
1247 | error_setg(errp, | |
1248 | "Background-snapshot is not compatible with %s", | |
1249 | MigrationCapability_str(incomp_cap)); | |
1250 | return false; | |
1251 | } | |
1252 | } | |
1253 | } | |
1254 | ||
4a84214e PX |
1255 | return true; |
1256 | } | |
1257 | ||
65ace060 AP |
1258 | static void fill_destination_migration_info(MigrationInfo *info) |
1259 | { | |
1260 | MigrationIncomingState *mis = migration_incoming_get_current(); | |
1261 | ||
9aca82ba JQ |
1262 | if (mis->socket_address_list) { |
1263 | info->has_socket_address = true; | |
1264 | info->socket_address = | |
1265 | QAPI_CLONE(SocketAddressList, mis->socket_address_list); | |
1266 | } | |
1267 | ||
65ace060 AP |
1268 | switch (mis->state) { |
1269 | case MIGRATION_STATUS_NONE: | |
1270 | return; | |
65ace060 AP |
1271 | case MIGRATION_STATUS_SETUP: |
1272 | case MIGRATION_STATUS_CANCELLING: | |
1273 | case MIGRATION_STATUS_CANCELLED: | |
1274 | case MIGRATION_STATUS_ACTIVE: | |
1275 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: | |
3c9928d9 PX |
1276 | case MIGRATION_STATUS_POSTCOPY_PAUSED: |
1277 | case MIGRATION_STATUS_POSTCOPY_RECOVER: | |
65ace060 AP |
1278 | case MIGRATION_STATUS_FAILED: |
1279 | case MIGRATION_STATUS_COLO: | |
1280 | info->has_status = true; | |
1281 | break; | |
1282 | case MIGRATION_STATUS_COMPLETED: | |
1283 | info->has_status = true; | |
1284 | fill_destination_postcopy_migration_info(info); | |
1285 | break; | |
1286 | } | |
1287 | info->status = mis->state; | |
1288 | } | |
1289 | ||
1290 | MigrationInfo *qmp_query_migrate(Error **errp) | |
1291 | { | |
1292 | MigrationInfo *info = g_malloc0(sizeof(*info)); | |
1293 | ||
1294 | fill_destination_migration_info(info); | |
1295 | fill_source_migration_info(info); | |
1296 | ||
1297 | return info; | |
1298 | } | |
1299 | ||
4a84214e PX |
1300 | void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, |
1301 | Error **errp) | |
1302 | { | |
1303 | MigrationState *s = migrate_get_current(); | |
1304 | MigrationCapabilityStatusList *cap; | |
dd0ee30c | 1305 | bool cap_list[MIGRATION_CAPABILITY__MAX]; |
4a84214e | 1306 | |
392d87e2 | 1307 | if (migration_is_running(s->state)) { |
4a84214e PX |
1308 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
1309 | return; | |
1310 | } | |
1311 | ||
dd0ee30c PX |
1312 | memcpy(cap_list, s->enabled_capabilities, sizeof(cap_list)); |
1313 | if (!migrate_caps_check(cap_list, params, errp)) { | |
4a84214e PX |
1314 | return; |
1315 | } | |
1316 | ||
1317 | for (cap = params; cap; cap = cap->next) { | |
1318 | s->enabled_capabilities[cap->value->capability] = cap->value->state; | |
1319 | } | |
00458433 OW |
1320 | } |
1321 | ||
16d063bc PX |
1322 | /* |
1323 | * Check whether the parameters are valid. Error will be put into errp | |
1324 | * (if provided). Return true if valid, otherwise false. | |
1325 | */ | |
1326 | static bool migrate_params_check(MigrationParameters *params, Error **errp) | |
85de8323 | 1327 | { |
7f375e04 | 1328 | if (params->has_compress_level && |
741d4086 | 1329 | (params->compress_level > 9)) { |
c6bd8c70 | 1330 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level", |
54270c45 | 1331 | "a value between 0 and 9"); |
16d063bc | 1332 | return false; |
85de8323 | 1333 | } |
16d063bc | 1334 | |
741d4086 | 1335 | if (params->has_compress_threads && (params->compress_threads < 1)) { |
c6bd8c70 MA |
1336 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
1337 | "compress_threads", | |
54270c45 | 1338 | "a value between 1 and 255"); |
16d063bc | 1339 | return false; |
85de8323 | 1340 | } |
16d063bc | 1341 | |
741d4086 | 1342 | if (params->has_decompress_threads && (params->decompress_threads < 1)) { |
c6bd8c70 MA |
1343 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
1344 | "decompress_threads", | |
54270c45 | 1345 | "a value between 1 and 255"); |
16d063bc | 1346 | return false; |
85de8323 | 1347 | } |
16d063bc | 1348 | |
dc14a470 KZ |
1349 | if (params->has_throttle_trigger_threshold && |
1350 | (params->throttle_trigger_threshold < 1 || | |
1351 | params->throttle_trigger_threshold > 100)) { | |
1352 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1353 | "throttle_trigger_threshold", | |
1354 | "an integer in the range of 1 to 100"); | |
1355 | return false; | |
1356 | } | |
1357 | ||
7f375e04 EB |
1358 | if (params->has_cpu_throttle_initial && |
1359 | (params->cpu_throttle_initial < 1 || | |
1360 | params->cpu_throttle_initial > 99)) { | |
1626fee3 | 1361 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
d85a31d1 | 1362 | "cpu_throttle_initial", |
1626fee3 | 1363 | "an integer in the range of 1 to 99"); |
16d063bc | 1364 | return false; |
1626fee3 | 1365 | } |
16d063bc | 1366 | |
7f375e04 EB |
1367 | if (params->has_cpu_throttle_increment && |
1368 | (params->cpu_throttle_increment < 1 || | |
1369 | params->cpu_throttle_increment > 99)) { | |
1626fee3 | 1370 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
d85a31d1 | 1371 | "cpu_throttle_increment", |
1626fee3 | 1372 | "an integer in the range of 1 to 99"); |
16d063bc | 1373 | return false; |
1626fee3 | 1374 | } |
16d063bc | 1375 | |
741d4086 | 1376 | if (params->has_max_bandwidth && (params->max_bandwidth > SIZE_MAX)) { |
2ee30cf0 MZ |
1377 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
1378 | "max_bandwidth", | |
1379 | "an integer in the range of 0 to "stringify(SIZE_MAX) | |
1380 | " bytes/second"); | |
16d063bc | 1381 | return false; |
2ff30257 | 1382 | } |
16d063bc | 1383 | |
2ff30257 | 1384 | if (params->has_downtime_limit && |
741d4086 | 1385 | (params->downtime_limit > MAX_MIGRATE_DOWNTIME)) { |
2ee30cf0 MZ |
1386 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
1387 | "downtime_limit", | |
1388 | "an integer in the range of 0 to " | |
7ac5529a | 1389 | stringify(MAX_MIGRATE_DOWNTIME)" ms"); |
16d063bc | 1390 | return false; |
2ff30257 | 1391 | } |
16d063bc | 1392 | |
741d4086 JQ |
1393 | /* x_checkpoint_delay is now always positive */ |
1394 | ||
cbfd6c95 | 1395 | if (params->has_multifd_channels && (params->multifd_channels < 1)) { |
4075fb1c JQ |
1396 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
1397 | "multifd_channels", | |
54270c45 | 1398 | "a value between 1 and 255"); |
4075fb1c JQ |
1399 | return false; |
1400 | } | |
16d063bc | 1401 | |
9004db48 JQ |
1402 | if (params->has_multifd_zlib_level && |
1403 | (params->multifd_zlib_level > 9)) { | |
1404 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zlib_level", | |
54270c45 | 1405 | "a value between 0 and 9"); |
9004db48 JQ |
1406 | return false; |
1407 | } | |
1408 | ||
6a9ad154 JQ |
1409 | if (params->has_multifd_zstd_level && |
1410 | (params->multifd_zstd_level > 20)) { | |
1411 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zstd_level", | |
54270c45 | 1412 | "a value between 0 and 20"); |
6a9ad154 JQ |
1413 | return false; |
1414 | } | |
1415 | ||
73af8dd8 JQ |
1416 | if (params->has_xbzrle_cache_size && |
1417 | (params->xbzrle_cache_size < qemu_target_page_size() || | |
1418 | !is_power_of_2(params->xbzrle_cache_size))) { | |
1419 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1420 | "xbzrle_cache_size", | |
54270c45 | 1421 | "a power of two no less than the target page size"); |
73af8dd8 JQ |
1422 | return false; |
1423 | } | |
1424 | ||
4cbc9c7f LQ |
1425 | if (params->has_max_cpu_throttle && |
1426 | (params->max_cpu_throttle < params->cpu_throttle_initial || | |
1427 | params->max_cpu_throttle > 99)) { | |
1428 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1429 | "max_cpu_throttle", | |
1430 | "an integer in the range of cpu_throttle_initial to 99"); | |
1431 | return false; | |
1432 | } | |
1433 | ||
ee3d96ba DDAG |
1434 | if (params->has_announce_initial && |
1435 | params->announce_initial > 100000) { | |
1436 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1437 | "announce_initial", | |
54270c45 | 1438 | "a value between 0 and 100000"); |
ee3d96ba DDAG |
1439 | return false; |
1440 | } | |
1441 | if (params->has_announce_max && | |
1442 | params->announce_max > 100000) { | |
1443 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1444 | "announce_max", | |
54270c45 | 1445 | "a value between 0 and 100000"); |
ee3d96ba DDAG |
1446 | return false; |
1447 | } | |
1448 | if (params->has_announce_rounds && | |
1449 | params->announce_rounds > 1000) { | |
1450 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1451 | "announce_rounds", | |
54270c45 | 1452 | "a value between 0 and 1000"); |
ee3d96ba DDAG |
1453 | return false; |
1454 | } | |
1455 | if (params->has_announce_step && | |
1456 | (params->announce_step < 1 || | |
1457 | params->announce_step > 10000)) { | |
1458 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1459 | "announce_step", | |
54270c45 | 1460 | "a value between 0 and 10000"); |
ee3d96ba DDAG |
1461 | return false; |
1462 | } | |
31e4c354 HR |
1463 | |
1464 | if (params->has_block_bitmap_mapping && | |
1465 | !check_dirty_bitmap_mig_alias_map(params->block_bitmap_mapping, errp)) { | |
1466 | error_prepend(errp, "Invalid mapping given for block-bitmap-mapping: "); | |
1467 | return false; | |
1468 | } | |
1469 | ||
16d063bc PX |
1470 | return true; |
1471 | } | |
1472 | ||
1bda8b3c MA |
1473 | static void migrate_params_test_apply(MigrateSetParameters *params, |
1474 | MigrationParameters *dest) | |
1475 | { | |
1476 | *dest = migrate_get_current()->parameters; | |
1477 | ||
1478 | /* TODO use QAPI_CLONE() instead of duplicating it inline */ | |
1479 | ||
1480 | if (params->has_compress_level) { | |
1481 | dest->compress_level = params->compress_level; | |
1482 | } | |
1483 | ||
1484 | if (params->has_compress_threads) { | |
1485 | dest->compress_threads = params->compress_threads; | |
1486 | } | |
1487 | ||
1d58872a XG |
1488 | if (params->has_compress_wait_thread) { |
1489 | dest->compress_wait_thread = params->compress_wait_thread; | |
1490 | } | |
1491 | ||
1bda8b3c MA |
1492 | if (params->has_decompress_threads) { |
1493 | dest->decompress_threads = params->decompress_threads; | |
1494 | } | |
1495 | ||
dc14a470 KZ |
1496 | if (params->has_throttle_trigger_threshold) { |
1497 | dest->throttle_trigger_threshold = params->throttle_trigger_threshold; | |
1498 | } | |
1499 | ||
1bda8b3c MA |
1500 | if (params->has_cpu_throttle_initial) { |
1501 | dest->cpu_throttle_initial = params->cpu_throttle_initial; | |
1502 | } | |
1503 | ||
1504 | if (params->has_cpu_throttle_increment) { | |
1505 | dest->cpu_throttle_increment = params->cpu_throttle_increment; | |
1506 | } | |
1507 | ||
cbbf8182 KZ |
1508 | if (params->has_cpu_throttle_tailslow) { |
1509 | dest->cpu_throttle_tailslow = params->cpu_throttle_tailslow; | |
1510 | } | |
1511 | ||
1bda8b3c | 1512 | if (params->has_tls_creds) { |
01fa5598 | 1513 | assert(params->tls_creds->type == QTYPE_QSTRING); |
9728ebfb | 1514 | dest->tls_creds = params->tls_creds->u.s; |
1bda8b3c MA |
1515 | } |
1516 | ||
1517 | if (params->has_tls_hostname) { | |
01fa5598 | 1518 | assert(params->tls_hostname->type == QTYPE_QSTRING); |
9728ebfb | 1519 | dest->tls_hostname = params->tls_hostname->u.s; |
1bda8b3c MA |
1520 | } |
1521 | ||
1522 | if (params->has_max_bandwidth) { | |
1523 | dest->max_bandwidth = params->max_bandwidth; | |
1524 | } | |
1525 | ||
1526 | if (params->has_downtime_limit) { | |
1527 | dest->downtime_limit = params->downtime_limit; | |
1528 | } | |
1529 | ||
1530 | if (params->has_x_checkpoint_delay) { | |
1531 | dest->x_checkpoint_delay = params->x_checkpoint_delay; | |
1532 | } | |
1533 | ||
1534 | if (params->has_block_incremental) { | |
1535 | dest->block_incremental = params->block_incremental; | |
1536 | } | |
cbfd6c95 JQ |
1537 | if (params->has_multifd_channels) { |
1538 | dest->multifd_channels = params->multifd_channels; | |
5e7577a1 | 1539 | } |
96eef042 JQ |
1540 | if (params->has_multifd_compression) { |
1541 | dest->multifd_compression = params->multifd_compression; | |
1542 | } | |
73af8dd8 JQ |
1543 | if (params->has_xbzrle_cache_size) { |
1544 | dest->xbzrle_cache_size = params->xbzrle_cache_size; | |
1545 | } | |
7e555c6c DDAG |
1546 | if (params->has_max_postcopy_bandwidth) { |
1547 | dest->max_postcopy_bandwidth = params->max_postcopy_bandwidth; | |
1548 | } | |
4cbc9c7f LQ |
1549 | if (params->has_max_cpu_throttle) { |
1550 | dest->max_cpu_throttle = params->max_cpu_throttle; | |
1551 | } | |
ee3d96ba DDAG |
1552 | if (params->has_announce_initial) { |
1553 | dest->announce_initial = params->announce_initial; | |
1554 | } | |
1555 | if (params->has_announce_max) { | |
1556 | dest->announce_max = params->announce_max; | |
1557 | } | |
1558 | if (params->has_announce_rounds) { | |
1559 | dest->announce_rounds = params->announce_rounds; | |
1560 | } | |
1561 | if (params->has_announce_step) { | |
1562 | dest->announce_step = params->announce_step; | |
1563 | } | |
31e4c354 HR |
1564 | |
1565 | if (params->has_block_bitmap_mapping) { | |
1566 | dest->has_block_bitmap_mapping = true; | |
1567 | dest->block_bitmap_mapping = params->block_bitmap_mapping; | |
1568 | } | |
1bda8b3c MA |
1569 | } |
1570 | ||
73af8dd8 | 1571 | static void migrate_params_apply(MigrateSetParameters *params, Error **errp) |
16d063bc PX |
1572 | { |
1573 | MigrationState *s = migrate_get_current(); | |
1574 | ||
e87fae4c MA |
1575 | /* TODO use QAPI_CLONE() instead of duplicating it inline */ |
1576 | ||
7f375e04 EB |
1577 | if (params->has_compress_level) { |
1578 | s->parameters.compress_level = params->compress_level; | |
85de8323 | 1579 | } |
476c72aa | 1580 | |
7f375e04 EB |
1581 | if (params->has_compress_threads) { |
1582 | s->parameters.compress_threads = params->compress_threads; | |
85de8323 | 1583 | } |
476c72aa | 1584 | |
1d58872a XG |
1585 | if (params->has_compress_wait_thread) { |
1586 | s->parameters.compress_wait_thread = params->compress_wait_thread; | |
1587 | } | |
1588 | ||
7f375e04 EB |
1589 | if (params->has_decompress_threads) { |
1590 | s->parameters.decompress_threads = params->decompress_threads; | |
85de8323 | 1591 | } |
476c72aa | 1592 | |
dc14a470 KZ |
1593 | if (params->has_throttle_trigger_threshold) { |
1594 | s->parameters.throttle_trigger_threshold = params->throttle_trigger_threshold; | |
1595 | } | |
1596 | ||
7f375e04 EB |
1597 | if (params->has_cpu_throttle_initial) { |
1598 | s->parameters.cpu_throttle_initial = params->cpu_throttle_initial; | |
1626fee3 | 1599 | } |
476c72aa | 1600 | |
7f375e04 EB |
1601 | if (params->has_cpu_throttle_increment) { |
1602 | s->parameters.cpu_throttle_increment = params->cpu_throttle_increment; | |
1626fee3 | 1603 | } |
476c72aa | 1604 | |
cbbf8182 KZ |
1605 | if (params->has_cpu_throttle_tailslow) { |
1606 | s->parameters.cpu_throttle_tailslow = params->cpu_throttle_tailslow; | |
1607 | } | |
1608 | ||
7f375e04 | 1609 | if (params->has_tls_creds) { |
69ef1f36 | 1610 | g_free(s->parameters.tls_creds); |
01fa5598 MA |
1611 | assert(params->tls_creds->type == QTYPE_QSTRING); |
1612 | s->parameters.tls_creds = g_strdup(params->tls_creds->u.s); | |
69ef1f36 | 1613 | } |
476c72aa | 1614 | |
7f375e04 | 1615 | if (params->has_tls_hostname) { |
69ef1f36 | 1616 | g_free(s->parameters.tls_hostname); |
01fa5598 MA |
1617 | assert(params->tls_hostname->type == QTYPE_QSTRING); |
1618 | s->parameters.tls_hostname = g_strdup(params->tls_hostname->u.s); | |
69ef1f36 | 1619 | } |
476c72aa | 1620 | |
d2f1d29b DB |
1621 | if (params->has_tls_authz) { |
1622 | g_free(s->parameters.tls_authz); | |
1623 | assert(params->tls_authz->type == QTYPE_QSTRING); | |
1624 | s->parameters.tls_authz = g_strdup(params->tls_authz->u.s); | |
1625 | } | |
1626 | ||
2ff30257 AA |
1627 | if (params->has_max_bandwidth) { |
1628 | s->parameters.max_bandwidth = params->max_bandwidth; | |
c38c1c14 | 1629 | if (s->to_dst_file && !migration_in_postcopy()) { |
2ff30257 AA |
1630 | qemu_file_set_rate_limit(s->to_dst_file, |
1631 | s->parameters.max_bandwidth / XFER_LIMIT_RATIO); | |
1632 | } | |
1633 | } | |
476c72aa | 1634 | |
2ff30257 AA |
1635 | if (params->has_downtime_limit) { |
1636 | s->parameters.downtime_limit = params->downtime_limit; | |
1637 | } | |
68b53591 HZ |
1638 | |
1639 | if (params->has_x_checkpoint_delay) { | |
1640 | s->parameters.x_checkpoint_delay = params->x_checkpoint_delay; | |
479125d5 HZ |
1641 | if (migration_in_colo_state()) { |
1642 | colo_checkpoint_notify(s); | |
1643 | } | |
68b53591 | 1644 | } |
476c72aa | 1645 | |
2833c59b JQ |
1646 | if (params->has_block_incremental) { |
1647 | s->parameters.block_incremental = params->block_incremental; | |
1648 | } | |
cbfd6c95 JQ |
1649 | if (params->has_multifd_channels) { |
1650 | s->parameters.multifd_channels = params->multifd_channels; | |
4075fb1c | 1651 | } |
96eef042 JQ |
1652 | if (params->has_multifd_compression) { |
1653 | s->parameters.multifd_compression = params->multifd_compression; | |
1654 | } | |
73af8dd8 JQ |
1655 | if (params->has_xbzrle_cache_size) { |
1656 | s->parameters.xbzrle_cache_size = params->xbzrle_cache_size; | |
1657 | xbzrle_cache_resize(params->xbzrle_cache_size, errp); | |
1658 | } | |
7e555c6c DDAG |
1659 | if (params->has_max_postcopy_bandwidth) { |
1660 | s->parameters.max_postcopy_bandwidth = params->max_postcopy_bandwidth; | |
c38c1c14 DDAG |
1661 | if (s->to_dst_file && migration_in_postcopy()) { |
1662 | qemu_file_set_rate_limit(s->to_dst_file, | |
1663 | s->parameters.max_postcopy_bandwidth / XFER_LIMIT_RATIO); | |
1664 | } | |
7e555c6c | 1665 | } |
4cbc9c7f LQ |
1666 | if (params->has_max_cpu_throttle) { |
1667 | s->parameters.max_cpu_throttle = params->max_cpu_throttle; | |
1668 | } | |
ee3d96ba DDAG |
1669 | if (params->has_announce_initial) { |
1670 | s->parameters.announce_initial = params->announce_initial; | |
1671 | } | |
1672 | if (params->has_announce_max) { | |
1673 | s->parameters.announce_max = params->announce_max; | |
1674 | } | |
1675 | if (params->has_announce_rounds) { | |
1676 | s->parameters.announce_rounds = params->announce_rounds; | |
1677 | } | |
1678 | if (params->has_announce_step) { | |
1679 | s->parameters.announce_step = params->announce_step; | |
1680 | } | |
31e4c354 HR |
1681 | |
1682 | if (params->has_block_bitmap_mapping) { | |
1683 | qapi_free_BitmapMigrationNodeAliasList( | |
1684 | s->parameters.block_bitmap_mapping); | |
1685 | ||
1686 | s->parameters.has_block_bitmap_mapping = true; | |
1687 | s->parameters.block_bitmap_mapping = | |
1688 | QAPI_CLONE(BitmapMigrationNodeAliasList, | |
1689 | params->block_bitmap_mapping); | |
1690 | } | |
85de8323 LL |
1691 | } |
1692 | ||
1bda8b3c | 1693 | void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp) |
476c72aa | 1694 | { |
1bda8b3c MA |
1695 | MigrationParameters tmp; |
1696 | ||
01fa5598 MA |
1697 | /* TODO Rewrite "" to null instead */ |
1698 | if (params->has_tls_creds | |
1699 | && params->tls_creds->type == QTYPE_QNULL) { | |
cb3e7f08 | 1700 | qobject_unref(params->tls_creds->u.n); |
01fa5598 MA |
1701 | params->tls_creds->type = QTYPE_QSTRING; |
1702 | params->tls_creds->u.s = strdup(""); | |
1703 | } | |
1704 | /* TODO Rewrite "" to null instead */ | |
1705 | if (params->has_tls_hostname | |
1706 | && params->tls_hostname->type == QTYPE_QNULL) { | |
cb3e7f08 | 1707 | qobject_unref(params->tls_hostname->u.n); |
01fa5598 MA |
1708 | params->tls_hostname->type = QTYPE_QSTRING; |
1709 | params->tls_hostname->u.s = strdup(""); | |
1710 | } | |
1711 | ||
1bda8b3c MA |
1712 | migrate_params_test_apply(params, &tmp); |
1713 | ||
1714 | if (!migrate_params_check(&tmp, errp)) { | |
476c72aa PX |
1715 | /* Invalid parameter */ |
1716 | return; | |
1717 | } | |
1718 | ||
73af8dd8 | 1719 | migrate_params_apply(params, errp); |
476c72aa PX |
1720 | } |
1721 | ||
2594f56d | 1722 | |
4886a1bc DDAG |
1723 | void qmp_migrate_start_postcopy(Error **errp) |
1724 | { | |
1725 | MigrationState *s = migrate_get_current(); | |
1726 | ||
16b0fd32 | 1727 | if (!migrate_postcopy()) { |
a54d340b | 1728 | error_setg(errp, "Enable postcopy with migrate_set_capability before" |
4886a1bc DDAG |
1729 | " the start of migration"); |
1730 | return; | |
1731 | } | |
1732 | ||
1733 | if (s->state == MIGRATION_STATUS_NONE) { | |
1734 | error_setg(errp, "Postcopy must be started after migration has been" | |
1735 | " started"); | |
1736 | return; | |
1737 | } | |
1738 | /* | |
1739 | * we don't error if migration has finished since that would be racy | |
1740 | * with issuing this command. | |
1741 | */ | |
d73415a3 | 1742 | qatomic_set(&s->start_postcopy, true); |
4886a1bc DDAG |
1743 | } |
1744 | ||
065e2813 AL |
1745 | /* shared migration helpers */ |
1746 | ||
48781e5b | 1747 | void migrate_set_state(int *state, int old_state, int new_state) |
51cf4c1a | 1748 | { |
a31fedee | 1749 | assert(new_state < MIGRATION_STATUS__MAX); |
d73415a3 | 1750 | if (qatomic_cmpxchg(state, old_state, new_state) == old_state) { |
a31fedee | 1751 | trace_migrate_set_state(MigrationStatus_str(new_state)); |
b05dc723 | 1752 | migrate_generate_event(new_state); |
51cf4c1a Z |
1753 | } |
1754 | } | |
1755 | ||
eaedde52 EB |
1756 | static MigrationCapabilityStatus *migrate_cap_add(MigrationCapability index, |
1757 | bool state) | |
2833c59b | 1758 | { |
eaedde52 | 1759 | MigrationCapabilityStatus *cap; |
2833c59b | 1760 | |
eaedde52 EB |
1761 | cap = g_new0(MigrationCapabilityStatus, 1); |
1762 | cap->capability = index; | |
1763 | cap->state = state; | |
4e4a3d3a PX |
1764 | |
1765 | return cap; | |
1766 | } | |
1767 | ||
1768 | void migrate_set_block_enabled(bool value, Error **errp) | |
1769 | { | |
eaedde52 | 1770 | MigrationCapabilityStatusList *cap = NULL; |
4e4a3d3a | 1771 | |
eaedde52 | 1772 | QAPI_LIST_PREPEND(cap, migrate_cap_add(MIGRATION_CAPABILITY_BLOCK, value)); |
2833c59b JQ |
1773 | qmp_migrate_set_capabilities(cap, errp); |
1774 | qapi_free_MigrationCapabilityStatusList(cap); | |
1775 | } | |
1776 | ||
1777 | static void migrate_set_block_incremental(MigrationState *s, bool value) | |
1778 | { | |
1779 | s->parameters.block_incremental = value; | |
1780 | } | |
1781 | ||
1782 | static void block_cleanup_parameters(MigrationState *s) | |
1783 | { | |
1784 | if (s->must_remove_block_options) { | |
1785 | /* setting to false can never fail */ | |
1786 | migrate_set_block_enabled(false, &error_abort); | |
1787 | migrate_set_block_incremental(s, false); | |
1788 | s->must_remove_block_options = false; | |
1789 | } | |
1790 | } | |
1791 | ||
fd392cfa | 1792 | static void migrate_fd_cleanup(MigrationState *s) |
065e2813 | 1793 | { |
bb1fadc4 PB |
1794 | qemu_bh_delete(s->cleanup_bh); |
1795 | s->cleanup_bh = NULL; | |
1796 | ||
0ceccd85 PX |
1797 | qemu_savevm_state_cleanup(); |
1798 | ||
89a02a9f | 1799 | if (s->to_dst_file) { |
62df066f | 1800 | QEMUFile *tmp; |
f986c3d2 | 1801 | |
9013dca5 | 1802 | trace_migrate_fd_cleanup(); |
404a7c05 | 1803 | qemu_mutex_unlock_iothread(); |
1d34e4bf DDAG |
1804 | if (s->migration_thread_running) { |
1805 | qemu_thread_join(&s->thread); | |
1806 | s->migration_thread_running = false; | |
1807 | } | |
404a7c05 PB |
1808 | qemu_mutex_lock_iothread(); |
1809 | ||
1398b2e3 | 1810 | multifd_save_cleanup(); |
62df066f PX |
1811 | qemu_mutex_lock(&s->qemu_file_lock); |
1812 | tmp = s->to_dst_file; | |
89a02a9f | 1813 | s->to_dst_file = NULL; |
62df066f PX |
1814 | qemu_mutex_unlock(&s->qemu_file_lock); |
1815 | /* | |
1816 | * Close the file handle without the lock to make sure the | |
1817 | * critical section won't block for long. | |
1818 | */ | |
1819 | qemu_fclose(tmp); | |
065e2813 AL |
1820 | } |
1821 | ||
8f8d528e | 1822 | assert(!migration_is_active(s)); |
7a2c1721 | 1823 | |
94f5a437 | 1824 | if (s->state == MIGRATION_STATUS_CANCELLING) { |
48781e5b | 1825 | migrate_set_state(&s->state, MIGRATION_STATUS_CANCELLING, |
94f5a437 | 1826 | MIGRATION_STATUS_CANCELLED); |
7a2c1721 | 1827 | } |
a3fa1d78 | 1828 | |
87db1a7d JQ |
1829 | if (s->error) { |
1830 | /* It is used on info migrate. We can't free it */ | |
1831 | error_report_err(error_copy(s->error)); | |
1832 | } | |
a3fa1d78 | 1833 | notifier_list_notify(&migration_state_notifiers, s); |
2833c59b | 1834 | block_cleanup_parameters(s); |
b5eea99e | 1835 | yank_unregister_instance(MIGRATION_YANK_INSTANCE); |
065e2813 AL |
1836 | } |
1837 | ||
fd392cfa YK |
1838 | static void migrate_fd_cleanup_schedule(MigrationState *s) |
1839 | { | |
1840 | /* | |
1841 | * Ref the state for bh, because it may be called when | |
1842 | * there're already no other refs | |
1843 | */ | |
1844 | object_ref(OBJECT(s)); | |
1845 | qemu_bh_schedule(s->cleanup_bh); | |
1846 | } | |
1847 | ||
1848 | static void migrate_fd_cleanup_bh(void *opaque) | |
1849 | { | |
1850 | MigrationState *s = opaque; | |
1851 | migrate_fd_cleanup(s); | |
1852 | object_unref(OBJECT(s)); | |
1853 | } | |
1854 | ||
87db1a7d JQ |
1855 | void migrate_set_error(MigrationState *s, const Error *error) |
1856 | { | |
6e8a355d | 1857 | QEMU_LOCK_GUARD(&s->error_mutex); |
87db1a7d JQ |
1858 | if (!s->error) { |
1859 | s->error = error_copy(error); | |
1860 | } | |
87db1a7d JQ |
1861 | } |
1862 | ||
d59ce6f3 | 1863 | void migrate_fd_error(MigrationState *s, const Error *error) |
065e2813 | 1864 | { |
25174055 | 1865 | trace_migrate_fd_error(error_get_pretty(error)); |
89a02a9f | 1866 | assert(s->to_dst_file == NULL); |
48781e5b HZ |
1867 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
1868 | MIGRATION_STATUS_FAILED); | |
87db1a7d | 1869 | migrate_set_error(s, error); |
458cf28e JQ |
1870 | } |
1871 | ||
0edda1c4 | 1872 | static void migrate_fd_cancel(MigrationState *s) |
065e2813 | 1873 | { |
6f2b811a | 1874 | int old_state ; |
89a02a9f | 1875 | QEMUFile *f = migrate_get_current()->to_dst_file; |
9013dca5 | 1876 | trace_migrate_fd_cancel(); |
065e2813 | 1877 | |
70b20477 DDAG |
1878 | if (s->rp_state.from_dst_file) { |
1879 | /* shutdown the rp socket, so causing the rp thread to shutdown */ | |
1880 | qemu_file_shutdown(s->rp_state.from_dst_file); | |
1881 | } | |
1882 | ||
6f2b811a Z |
1883 | do { |
1884 | old_state = s->state; | |
392d87e2 | 1885 | if (!migration_is_running(old_state)) { |
6f2b811a Z |
1886 | break; |
1887 | } | |
a7b36b48 DDAG |
1888 | /* If the migration is paused, kick it out of the pause */ |
1889 | if (old_state == MIGRATION_STATUS_PRE_SWITCHOVER) { | |
1890 | qemu_sem_post(&s->pause_sem); | |
1891 | } | |
48781e5b | 1892 | migrate_set_state(&s->state, old_state, MIGRATION_STATUS_CANCELLING); |
31194731 | 1893 | } while (s->state != MIGRATION_STATUS_CANCELLING); |
a26ba26e DDAG |
1894 | |
1895 | /* | |
1896 | * If we're unlucky the migration code might be stuck somewhere in a | |
1897 | * send/write while the network has failed and is waiting to timeout; | |
1898 | * if we've got shutdown(2) available then we can force it to quit. | |
1899 | * The outgoing qemu file gets closed in migrate_fd_cleanup that is | |
1900 | * called in a bh, so there is no race against this cancel. | |
1901 | */ | |
31194731 | 1902 | if (s->state == MIGRATION_STATUS_CANCELLING && f) { |
a26ba26e DDAG |
1903 | qemu_file_shutdown(f); |
1904 | } | |
1d2acc31 HZ |
1905 | if (s->state == MIGRATION_STATUS_CANCELLING && s->block_inactive) { |
1906 | Error *local_err = NULL; | |
1907 | ||
1908 | bdrv_invalidate_cache_all(&local_err); | |
1909 | if (local_err) { | |
1910 | error_report_err(local_err); | |
1911 | } else { | |
1912 | s->block_inactive = false; | |
1913 | } | |
1914 | } | |
065e2813 AL |
1915 | } |
1916 | ||
99a0db9b GH |
1917 | void add_migration_state_change_notifier(Notifier *notify) |
1918 | { | |
1919 | notifier_list_add(&migration_state_notifiers, notify); | |
1920 | } | |
1921 | ||
1922 | void remove_migration_state_change_notifier(Notifier *notify) | |
1923 | { | |
31552529 | 1924 | notifier_remove(notify); |
99a0db9b GH |
1925 | } |
1926 | ||
02edd2e7 | 1927 | bool migration_in_setup(MigrationState *s) |
afe2df69 | 1928 | { |
31194731 | 1929 | return s->state == MIGRATION_STATUS_SETUP; |
afe2df69 GH |
1930 | } |
1931 | ||
7073693b | 1932 | bool migration_has_finished(MigrationState *s) |
99a0db9b | 1933 | { |
31194731 | 1934 | return s->state == MIGRATION_STATUS_COMPLETED; |
99a0db9b | 1935 | } |
0edda1c4 | 1936 | |
afe2df69 GH |
1937 | bool migration_has_failed(MigrationState *s) |
1938 | { | |
31194731 HZ |
1939 | return (s->state == MIGRATION_STATUS_CANCELLED || |
1940 | s->state == MIGRATION_STATUS_FAILED); | |
afe2df69 GH |
1941 | } |
1942 | ||
5727309d | 1943 | bool migration_in_postcopy(void) |
9ec055ae | 1944 | { |
5727309d JQ |
1945 | MigrationState *s = migrate_get_current(); |
1946 | ||
3748fef9 DDAG |
1947 | switch (s->state) { |
1948 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: | |
1949 | case MIGRATION_STATUS_POSTCOPY_PAUSED: | |
1950 | case MIGRATION_STATUS_POSTCOPY_RECOVER: | |
1951 | return true; | |
1952 | default: | |
1953 | return false; | |
1954 | } | |
9ec055ae DDAG |
1955 | } |
1956 | ||
b82fc321 DDAG |
1957 | bool migration_in_postcopy_after_devices(MigrationState *s) |
1958 | { | |
5727309d | 1959 | return migration_in_postcopy() && s->postcopy_after_devices; |
b82fc321 DDAG |
1960 | } |
1961 | ||
06df2e69 DH |
1962 | bool migration_in_incoming_postcopy(void) |
1963 | { | |
1964 | PostcopyState ps = postcopy_state_get(); | |
1965 | ||
1966 | return ps >= POSTCOPY_INCOMING_DISCARD && ps < POSTCOPY_INCOMING_END; | |
1967 | } | |
1968 | ||
1a8e44a8 AG |
1969 | bool migration_in_bg_snapshot(void) |
1970 | { | |
1971 | MigrationState *s = migrate_get_current(); | |
1972 | ||
1973 | return migrate_background_snapshot() && | |
1974 | migration_is_setup_or_active(s->state); | |
1975 | } | |
1976 | ||
fab35005 | 1977 | bool migration_is_idle(void) |
fe44dc91 | 1978 | { |
daff7f0b MA |
1979 | MigrationState *s = current_migration; |
1980 | ||
1981 | if (!s) { | |
1982 | return true; | |
1983 | } | |
fe44dc91 AA |
1984 | |
1985 | switch (s->state) { | |
1986 | case MIGRATION_STATUS_NONE: | |
1987 | case MIGRATION_STATUS_CANCELLED: | |
1988 | case MIGRATION_STATUS_COMPLETED: | |
1989 | case MIGRATION_STATUS_FAILED: | |
1990 | return true; | |
1991 | case MIGRATION_STATUS_SETUP: | |
1992 | case MIGRATION_STATUS_CANCELLING: | |
1993 | case MIGRATION_STATUS_ACTIVE: | |
1994 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: | |
1995 | case MIGRATION_STATUS_COLO: | |
31e06077 DDAG |
1996 | case MIGRATION_STATUS_PRE_SWITCHOVER: |
1997 | case MIGRATION_STATUS_DEVICE: | |
c7e0acd5 | 1998 | case MIGRATION_STATUS_WAIT_UNPLUG: |
fe44dc91 AA |
1999 | return false; |
2000 | case MIGRATION_STATUS__MAX: | |
2001 | g_assert_not_reached(); | |
2002 | } | |
2003 | ||
2004 | return false; | |
2005 | } | |
2006 | ||
8f8d528e WY |
2007 | bool migration_is_active(MigrationState *s) |
2008 | { | |
2009 | return (s->state == MIGRATION_STATUS_ACTIVE || | |
2010 | s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
2011 | } | |
2012 | ||
3e0c8050 | 2013 | void migrate_init(MigrationState *s) |
0edda1c4 | 2014 | { |
389775d1 DDAG |
2015 | /* |
2016 | * Reinitialise all migration state, except | |
2017 | * parameters/capabilities that the user set, and | |
2018 | * locks. | |
2019 | */ | |
389775d1 | 2020 | s->cleanup_bh = 0; |
8518278a | 2021 | s->vm_start_bh = 0; |
89a02a9f | 2022 | s->to_dst_file = NULL; |
389775d1 | 2023 | s->state = MIGRATION_STATUS_NONE; |
389775d1 DDAG |
2024 | s->rp_state.from_dst_file = NULL; |
2025 | s->rp_state.error = false; | |
2026 | s->mbps = 0.0; | |
aecbfe9c | 2027 | s->pages_per_second = 0.0; |
389775d1 DDAG |
2028 | s->downtime = 0; |
2029 | s->expected_downtime = 0; | |
389775d1 | 2030 | s->setup_time = 0; |
389775d1 | 2031 | s->start_postcopy = false; |
b82fc321 | 2032 | s->postcopy_after_devices = false; |
389775d1 | 2033 | s->migration_thread_running = false; |
d59ce6f3 DB |
2034 | error_free(s->error); |
2035 | s->error = NULL; | |
d8053e73 | 2036 | s->hostname = NULL; |
389775d1 | 2037 | |
48781e5b | 2038 | migrate_set_state(&s->state, MIGRATION_STATUS_NONE, MIGRATION_STATUS_SETUP); |
0edda1c4 | 2039 | |
4af246a3 PX |
2040 | s->start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
2041 | s->total_time = 0; | |
7287cbd4 | 2042 | s->vm_was_running = false; |
b15df1ae PX |
2043 | s->iteration_initial_bytes = 0; |
2044 | s->threshold_size = 0; | |
0edda1c4 | 2045 | } |
cab30143 | 2046 | |
fe44dc91 | 2047 | int migrate_add_blocker(Error *reason, Error **errp) |
fa2756b7 | 2048 | { |
811f8652 | 2049 | if (only_migratable) { |
4b576648 MA |
2050 | error_propagate_prepend(errp, error_copy(reason), |
2051 | "disallowing migration blocker " | |
b6eca81e | 2052 | "(--only-migratable) for: "); |
b67b8c3a AA |
2053 | return -EACCES; |
2054 | } | |
2055 | ||
fab35005 | 2056 | if (migration_is_idle()) { |
fe44dc91 AA |
2057 | migration_blockers = g_slist_prepend(migration_blockers, reason); |
2058 | return 0; | |
2059 | } | |
2060 | ||
4b576648 MA |
2061 | error_propagate_prepend(errp, error_copy(reason), |
2062 | "disallowing migration blocker " | |
2063 | "(migration in progress) for: "); | |
fe44dc91 | 2064 | return -EBUSY; |
fa2756b7 AL |
2065 | } |
2066 | ||
2067 | void migrate_del_blocker(Error *reason) | |
2068 | { | |
2069 | migration_blockers = g_slist_remove(migration_blockers, reason); | |
2070 | } | |
2071 | ||
bf1ae1f4 DDAG |
2072 | void qmp_migrate_incoming(const char *uri, Error **errp) |
2073 | { | |
2074 | Error *local_err = NULL; | |
4debb5f5 | 2075 | static bool once = true; |
bf1ae1f4 | 2076 | |
4debb5f5 DDAG |
2077 | if (!once) { |
2078 | error_setg(errp, "The incoming migration has already been started"); | |
603d5a42 | 2079 | return; |
4debb5f5 | 2080 | } |
e69d50d6 PB |
2081 | if (!runstate_check(RUN_STATE_INMIGRATE)) { |
2082 | error_setg(errp, "'-incoming' was not specified on the command line"); | |
2083 | return; | |
2084 | } | |
bf1ae1f4 DDAG |
2085 | |
2086 | qemu_start_incoming_migration(uri, &local_err); | |
2087 | ||
2088 | if (local_err) { | |
2089 | error_propagate(errp, local_err); | |
2090 | return; | |
2091 | } | |
2092 | ||
4debb5f5 | 2093 | once = false; |
bf1ae1f4 DDAG |
2094 | } |
2095 | ||
02affd41 PX |
2096 | void qmp_migrate_recover(const char *uri, Error **errp) |
2097 | { | |
2098 | MigrationIncomingState *mis = migration_incoming_get_current(); | |
2099 | ||
2100 | if (mis->state != MIGRATION_STATUS_POSTCOPY_PAUSED) { | |
2101 | error_setg(errp, "Migrate recover can only be run " | |
2102 | "when postcopy is paused."); | |
2103 | return; | |
2104 | } | |
2105 | ||
d73415a3 | 2106 | if (qatomic_cmpxchg(&mis->postcopy_recover_triggered, |
02affd41 PX |
2107 | false, true) == true) { |
2108 | error_setg(errp, "Migrate recovery is triggered already"); | |
2109 | return; | |
2110 | } | |
2111 | ||
2112 | /* | |
2113 | * Note that this call will never start a real migration; it will | |
2114 | * only re-setup the migration stream and poke existing migration | |
2115 | * to continue using that newly established channel. | |
2116 | */ | |
b5eea99e | 2117 | yank_unregister_instance(MIGRATION_YANK_INSTANCE); |
02affd41 PX |
2118 | qemu_start_incoming_migration(uri, errp); |
2119 | } | |
2120 | ||
bfbf89c2 PX |
2121 | void qmp_migrate_pause(Error **errp) |
2122 | { | |
2123 | MigrationState *ms = migrate_get_current(); | |
2124 | MigrationIncomingState *mis = migration_incoming_get_current(); | |
2125 | int ret; | |
2126 | ||
2127 | if (ms->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { | |
2128 | /* Source side, during postcopy */ | |
2129 | qemu_mutex_lock(&ms->qemu_file_lock); | |
2130 | ret = qemu_file_shutdown(ms->to_dst_file); | |
2131 | qemu_mutex_unlock(&ms->qemu_file_lock); | |
2132 | if (ret) { | |
2133 | error_setg(errp, "Failed to pause source migration"); | |
2134 | } | |
2135 | return; | |
2136 | } | |
2137 | ||
2138 | if (mis->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { | |
2139 | ret = qemu_file_shutdown(mis->from_src_file); | |
2140 | if (ret) { | |
2141 | error_setg(errp, "Failed to pause destination migration"); | |
2142 | } | |
2143 | return; | |
2144 | } | |
2145 | ||
2146 | error_setg(errp, "migrate-pause is currently only supported " | |
2147 | "during postcopy-active state"); | |
2148 | } | |
2149 | ||
24f3902b GK |
2150 | bool migration_is_blocked(Error **errp) |
2151 | { | |
2152 | if (qemu_savevm_state_blocked(errp)) { | |
2153 | return true; | |
2154 | } | |
2155 | ||
2156 | if (migration_blockers) { | |
250561e1 | 2157 | error_propagate(errp, error_copy(migration_blockers->data)); |
24f3902b GK |
2158 | return true; |
2159 | } | |
2160 | ||
2161 | return false; | |
2162 | } | |
2163 | ||
d3e35b8f PX |
2164 | /* Returns true if continue to migrate, or false if error detected */ |
2165 | static bool migrate_prepare(MigrationState *s, bool blk, bool blk_inc, | |
2166 | bool resume, Error **errp) | |
cab30143 | 2167 | { |
be7059cd | 2168 | Error *local_err = NULL; |
d3e35b8f PX |
2169 | |
2170 | if (resume) { | |
2171 | if (s->state != MIGRATION_STATUS_POSTCOPY_PAUSED) { | |
2172 | error_setg(errp, "Cannot resume if there is no " | |
2173 | "paused migration"); | |
2174 | return false; | |
2175 | } | |
97ca211c PX |
2176 | |
2177 | /* | |
2178 | * Postcopy recovery won't work well with release-ram | |
2179 | * capability since release-ram will drop the page buffer as | |
2180 | * long as the page is put into the send buffer. So if there | |
2181 | * is a network failure happened, any page buffers that have | |
2182 | * not yet reached the destination VM but have already been | |
2183 | * sent from the source VM will be lost forever. Let's refuse | |
2184 | * the client from resuming such a postcopy migration. | |
2185 | * Luckily release-ram was designed to only be used when src | |
2186 | * and destination VMs are on the same host, so it should be | |
2187 | * fine. | |
2188 | */ | |
2189 | if (migrate_release_ram()) { | |
2190 | error_setg(errp, "Postcopy recovery cannot work " | |
2191 | "when release-ram capability is set"); | |
2192 | return false; | |
2193 | } | |
2194 | ||
d3e35b8f PX |
2195 | /* This is a resume, skip init status */ |
2196 | return true; | |
2197 | } | |
cab30143 | 2198 | |
392d87e2 | 2199 | if (migration_is_running(s->state)) { |
c6bd8c70 | 2200 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
d3e35b8f | 2201 | return false; |
cab30143 | 2202 | } |
d3e35b8f | 2203 | |
ca99993a DDAG |
2204 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
2205 | error_setg(errp, "Guest is waiting for an incoming migration"); | |
d3e35b8f | 2206 | return false; |
ca99993a DDAG |
2207 | } |
2208 | ||
36d0fe65 T |
2209 | if (runstate_check(RUN_STATE_POSTMIGRATE)) { |
2210 | error_setg(errp, "Can't migrate the vm that was paused due to " | |
2211 | "previous migration"); | |
2212 | return false; | |
2213 | } | |
2214 | ||
24f3902b | 2215 | if (migration_is_blocked(errp)) { |
d3e35b8f | 2216 | return false; |
fa2756b7 AL |
2217 | } |
2218 | ||
d3e35b8f | 2219 | if (blk || blk_inc) { |
3ba02445 RL |
2220 | if (migrate_colo_enabled()) { |
2221 | error_setg(errp, "No disk migration is required in COLO mode"); | |
2222 | return false; | |
2223 | } | |
2833c59b JQ |
2224 | if (migrate_use_block() || migrate_use_block_incremental()) { |
2225 | error_setg(errp, "Command options are incompatible with " | |
2226 | "current migration capabilities"); | |
d3e35b8f | 2227 | return false; |
2833c59b JQ |
2228 | } |
2229 | migrate_set_block_enabled(true, &local_err); | |
2230 | if (local_err) { | |
2231 | error_propagate(errp, local_err); | |
d3e35b8f | 2232 | return false; |
2833c59b JQ |
2233 | } |
2234 | s->must_remove_block_options = true; | |
2235 | } | |
2236 | ||
d3e35b8f | 2237 | if (blk_inc) { |
2833c59b JQ |
2238 | migrate_set_block_incremental(s, true); |
2239 | } | |
2240 | ||
3e0c8050 | 2241 | migrate_init(s); |
87f3bd87 IR |
2242 | /* |
2243 | * set ram_counters memory to zero for a | |
2244 | * new migration | |
2245 | */ | |
2246 | memset(&ram_counters, 0, sizeof(ram_counters)); | |
cab30143 | 2247 | |
d3e35b8f PX |
2248 | return true; |
2249 | } | |
2250 | ||
2251 | void qmp_migrate(const char *uri, bool has_blk, bool blk, | |
2252 | bool has_inc, bool inc, bool has_detach, bool detach, | |
2253 | bool has_resume, bool resume, Error **errp) | |
2254 | { | |
2255 | Error *local_err = NULL; | |
2256 | MigrationState *s = migrate_get_current(); | |
d658f65c | 2257 | const char *p = NULL; |
d3e35b8f PX |
2258 | |
2259 | if (!migrate_prepare(s, has_blk && blk, has_inc && inc, | |
2260 | has_resume && resume, errp)) { | |
2261 | /* Error detected, put into errp */ | |
2262 | return; | |
2263 | } | |
2264 | ||
b5eea99e LS |
2265 | if (!(has_resume && resume)) { |
2266 | if (!yank_register_instance(MIGRATION_YANK_INSTANCE, errp)) { | |
2267 | return; | |
2268 | } | |
2269 | } | |
2270 | ||
d658f65c | 2271 | if (strstart(uri, "tcp:", &p) || |
9ba3b2ba LM |
2272 | strstart(uri, "unix:", NULL) || |
2273 | strstart(uri, "vsock:", NULL)) { | |
d658f65c | 2274 | socket_start_outgoing_migration(s, p ? p : uri, &local_err); |
2da776db | 2275 | #ifdef CONFIG_RDMA |
41310c68 | 2276 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
2277 | rdma_start_outgoing_migration(s, p, &local_err); |
2278 | #endif | |
cab30143 | 2279 | } else if (strstart(uri, "exec:", &p)) { |
f37afb5a | 2280 | exec_start_outgoing_migration(s, p, &local_err); |
cab30143 | 2281 | } else if (strstart(uri, "fd:", &p)) { |
f37afb5a | 2282 | fd_start_outgoing_migration(s, p, &local_err); |
99a0db9b | 2283 | } else { |
b5eea99e LS |
2284 | if (!(has_resume && resume)) { |
2285 | yank_unregister_instance(MIGRATION_YANK_INSTANCE); | |
2286 | } | |
c6bd8c70 MA |
2287 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "uri", |
2288 | "a valid migration protocol"); | |
48781e5b HZ |
2289 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
2290 | MIGRATION_STATUS_FAILED); | |
09576e74 | 2291 | block_cleanup_parameters(s); |
e1c37d0e | 2292 | return; |
cab30143 JQ |
2293 | } |
2294 | ||
f37afb5a | 2295 | if (local_err) { |
b5eea99e LS |
2296 | if (!(has_resume && resume)) { |
2297 | yank_unregister_instance(MIGRATION_YANK_INSTANCE); | |
2298 | } | |
d59ce6f3 | 2299 | migrate_fd_error(s, local_err); |
f37afb5a | 2300 | error_propagate(errp, local_err); |
e1c37d0e | 2301 | return; |
1299c631 | 2302 | } |
cab30143 JQ |
2303 | } |
2304 | ||
6cdedb07 | 2305 | void qmp_migrate_cancel(Error **errp) |
cab30143 | 2306 | { |
c7c0e724 | 2307 | migration_cancel(); |
cab30143 JQ |
2308 | } |
2309 | ||
89cfc02c DDAG |
2310 | void qmp_migrate_continue(MigrationStatus state, Error **errp) |
2311 | { | |
2312 | MigrationState *s = migrate_get_current(); | |
2313 | if (s->state != state) { | |
2314 | error_setg(errp, "Migration not in expected state: %s", | |
2315 | MigrationStatus_str(s->state)); | |
2316 | return; | |
2317 | } | |
2318 | qemu_sem_post(&s->pause_sem); | |
2319 | } | |
2320 | ||
53f09a10 PB |
2321 | bool migrate_release_ram(void) |
2322 | { | |
2323 | MigrationState *s; | |
2324 | ||
2325 | s = migrate_get_current(); | |
2326 | ||
2327 | return s->enabled_capabilities[MIGRATION_CAPABILITY_RELEASE_RAM]; | |
2328 | } | |
2329 | ||
53dd370c DDAG |
2330 | bool migrate_postcopy_ram(void) |
2331 | { | |
2332 | MigrationState *s; | |
2333 | ||
2334 | s = migrate_get_current(); | |
2335 | ||
32c3db5b | 2336 | return s->enabled_capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM]; |
53dd370c DDAG |
2337 | } |
2338 | ||
58110f0a VSO |
2339 | bool migrate_postcopy(void) |
2340 | { | |
dd6bb914 | 2341 | return migrate_postcopy_ram() || migrate_dirty_bitmaps(); |
58110f0a VSO |
2342 | } |
2343 | ||
bde1e2ec CV |
2344 | bool migrate_auto_converge(void) |
2345 | { | |
2346 | MigrationState *s; | |
2347 | ||
2348 | s = migrate_get_current(); | |
2349 | ||
2350 | return s->enabled_capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; | |
2351 | } | |
2352 | ||
323004a3 PL |
2353 | bool migrate_zero_blocks(void) |
2354 | { | |
2355 | MigrationState *s; | |
2356 | ||
2357 | s = migrate_get_current(); | |
2358 | ||
2359 | return s->enabled_capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS]; | |
2360 | } | |
2361 | ||
f22f928e AP |
2362 | bool migrate_postcopy_blocktime(void) |
2363 | { | |
2364 | MigrationState *s; | |
2365 | ||
2366 | s = migrate_get_current(); | |
2367 | ||
2368 | return s->enabled_capabilities[MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME]; | |
2369 | } | |
2370 | ||
8706d2d5 LL |
2371 | bool migrate_use_compression(void) |
2372 | { | |
dde4e694 LL |
2373 | MigrationState *s; |
2374 | ||
2375 | s = migrate_get_current(); | |
2376 | ||
2377 | return s->enabled_capabilities[MIGRATION_CAPABILITY_COMPRESS]; | |
8706d2d5 LL |
2378 | } |
2379 | ||
2380 | int migrate_compress_level(void) | |
2381 | { | |
2382 | MigrationState *s; | |
2383 | ||
2384 | s = migrate_get_current(); | |
2385 | ||
2594f56d | 2386 | return s->parameters.compress_level; |
8706d2d5 LL |
2387 | } |
2388 | ||
2389 | int migrate_compress_threads(void) | |
2390 | { | |
2391 | MigrationState *s; | |
2392 | ||
2393 | s = migrate_get_current(); | |
2394 | ||
2594f56d | 2395 | return s->parameters.compress_threads; |
8706d2d5 LL |
2396 | } |
2397 | ||
1d58872a XG |
2398 | int migrate_compress_wait_thread(void) |
2399 | { | |
2400 | MigrationState *s; | |
2401 | ||
2402 | s = migrate_get_current(); | |
2403 | ||
2404 | return s->parameters.compress_wait_thread; | |
2405 | } | |
2406 | ||
3fcb38c2 LL |
2407 | int migrate_decompress_threads(void) |
2408 | { | |
2409 | MigrationState *s; | |
2410 | ||
2411 | s = migrate_get_current(); | |
2412 | ||
2594f56d | 2413 | return s->parameters.decompress_threads; |
3fcb38c2 LL |
2414 | } |
2415 | ||
55efc8c2 VSO |
2416 | bool migrate_dirty_bitmaps(void) |
2417 | { | |
2418 | MigrationState *s; | |
2419 | ||
2420 | s = migrate_get_current(); | |
2421 | ||
2422 | return s->enabled_capabilities[MIGRATION_CAPABILITY_DIRTY_BITMAPS]; | |
2423 | } | |
2424 | ||
18269069 YK |
2425 | bool migrate_ignore_shared(void) |
2426 | { | |
2427 | MigrationState *s; | |
2428 | ||
2429 | s = migrate_get_current(); | |
2430 | ||
2431 | return s->enabled_capabilities[MIGRATION_CAPABILITY_X_IGNORE_SHARED]; | |
2432 | } | |
2433 | ||
b9d68df6 YK |
2434 | bool migrate_validate_uuid(void) |
2435 | { | |
2436 | MigrationState *s; | |
2437 | ||
2438 | s = migrate_get_current(); | |
2439 | ||
2440 | return s->enabled_capabilities[MIGRATION_CAPABILITY_VALIDATE_UUID]; | |
2441 | } | |
2442 | ||
b05dc723 JQ |
2443 | bool migrate_use_events(void) |
2444 | { | |
2445 | MigrationState *s; | |
2446 | ||
2447 | s = migrate_get_current(); | |
2448 | ||
2449 | return s->enabled_capabilities[MIGRATION_CAPABILITY_EVENTS]; | |
2450 | } | |
2451 | ||
30126bbf JQ |
2452 | bool migrate_use_multifd(void) |
2453 | { | |
2454 | MigrationState *s; | |
2455 | ||
2456 | s = migrate_get_current(); | |
2457 | ||
cbfd6c95 | 2458 | return s->enabled_capabilities[MIGRATION_CAPABILITY_MULTIFD]; |
30126bbf JQ |
2459 | } |
2460 | ||
93fbd031 DDAG |
2461 | bool migrate_pause_before_switchover(void) |
2462 | { | |
2463 | MigrationState *s; | |
2464 | ||
2465 | s = migrate_get_current(); | |
2466 | ||
2467 | return s->enabled_capabilities[ | |
2468 | MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER]; | |
2469 | } | |
2470 | ||
4075fb1c JQ |
2471 | int migrate_multifd_channels(void) |
2472 | { | |
2473 | MigrationState *s; | |
2474 | ||
2475 | s = migrate_get_current(); | |
2476 | ||
cbfd6c95 | 2477 | return s->parameters.multifd_channels; |
4075fb1c JQ |
2478 | } |
2479 | ||
ab7cbb0b JQ |
2480 | MultiFDCompression migrate_multifd_compression(void) |
2481 | { | |
2482 | MigrationState *s; | |
2483 | ||
2484 | s = migrate_get_current(); | |
2485 | ||
2486 | return s->parameters.multifd_compression; | |
2487 | } | |
2488 | ||
9004db48 JQ |
2489 | int migrate_multifd_zlib_level(void) |
2490 | { | |
2491 | MigrationState *s; | |
2492 | ||
2493 | s = migrate_get_current(); | |
2494 | ||
2495 | return s->parameters.multifd_zlib_level; | |
2496 | } | |
2497 | ||
6a9ad154 JQ |
2498 | int migrate_multifd_zstd_level(void) |
2499 | { | |
2500 | MigrationState *s; | |
2501 | ||
2502 | s = migrate_get_current(); | |
2503 | ||
2504 | return s->parameters.multifd_zstd_level; | |
2505 | } | |
2506 | ||
17ad9b35 OW |
2507 | int migrate_use_xbzrle(void) |
2508 | { | |
2509 | MigrationState *s; | |
2510 | ||
2511 | s = migrate_get_current(); | |
2512 | ||
2513 | return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE]; | |
2514 | } | |
2515 | ||
8b9407a0 | 2516 | uint64_t migrate_xbzrle_cache_size(void) |
17ad9b35 OW |
2517 | { |
2518 | MigrationState *s; | |
2519 | ||
2520 | s = migrate_get_current(); | |
2521 | ||
73af8dd8 | 2522 | return s->parameters.xbzrle_cache_size; |
17ad9b35 | 2523 | } |
0d82d0e8 | 2524 | |
7e555c6c DDAG |
2525 | static int64_t migrate_max_postcopy_bandwidth(void) |
2526 | { | |
2527 | MigrationState *s; | |
2528 | ||
2529 | s = migrate_get_current(); | |
2530 | ||
2531 | return s->parameters.max_postcopy_bandwidth; | |
2532 | } | |
2533 | ||
2833c59b JQ |
2534 | bool migrate_use_block(void) |
2535 | { | |
2536 | MigrationState *s; | |
2537 | ||
2538 | s = migrate_get_current(); | |
2539 | ||
2540 | return s->enabled_capabilities[MIGRATION_CAPABILITY_BLOCK]; | |
2541 | } | |
2542 | ||
c788ada8 PX |
2543 | bool migrate_use_return_path(void) |
2544 | { | |
2545 | MigrationState *s; | |
2546 | ||
2547 | s = migrate_get_current(); | |
2548 | ||
2549 | return s->enabled_capabilities[MIGRATION_CAPABILITY_RETURN_PATH]; | |
2550 | } | |
2551 | ||
2833c59b JQ |
2552 | bool migrate_use_block_incremental(void) |
2553 | { | |
2554 | MigrationState *s; | |
2555 | ||
2556 | s = migrate_get_current(); | |
2557 | ||
2558 | return s->parameters.block_incremental; | |
2559 | } | |
2560 | ||
6e8c25b4 AG |
2561 | bool migrate_background_snapshot(void) |
2562 | { | |
2563 | MigrationState *s; | |
2564 | ||
2565 | s = migrate_get_current(); | |
2566 | ||
2567 | return s->enabled_capabilities[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]; | |
2568 | } | |
2569 | ||
70b20477 DDAG |
2570 | /* migration thread support */ |
2571 | /* | |
2572 | * Something bad happened to the RP stream, mark an error | |
2573 | * The caller shall print or trace something to indicate why | |
2574 | */ | |
2575 | static void mark_source_rp_bad(MigrationState *s) | |
2576 | { | |
2577 | s->rp_state.error = true; | |
2578 | } | |
2579 | ||
2580 | static struct rp_cmd_args { | |
2581 | ssize_t len; /* -1 = variable */ | |
2582 | const char *name; | |
2583 | } rp_cmd_args[] = { | |
2584 | [MIG_RP_MSG_INVALID] = { .len = -1, .name = "INVALID" }, | |
2585 | [MIG_RP_MSG_SHUT] = { .len = 4, .name = "SHUT" }, | |
2586 | [MIG_RP_MSG_PONG] = { .len = 4, .name = "PONG" }, | |
1e2d90eb DDAG |
2587 | [MIG_RP_MSG_REQ_PAGES] = { .len = 12, .name = "REQ_PAGES" }, |
2588 | [MIG_RP_MSG_REQ_PAGES_ID] = { .len = -1, .name = "REQ_PAGES_ID" }, | |
a335debb | 2589 | [MIG_RP_MSG_RECV_BITMAP] = { .len = -1, .name = "RECV_BITMAP" }, |
13955b89 | 2590 | [MIG_RP_MSG_RESUME_ACK] = { .len = 4, .name = "RESUME_ACK" }, |
70b20477 DDAG |
2591 | [MIG_RP_MSG_MAX] = { .len = -1, .name = "MAX" }, |
2592 | }; | |
2593 | ||
1e2d90eb DDAG |
2594 | /* |
2595 | * Process a request for pages received on the return path, | |
2596 | * We're allowed to send more than requested (e.g. to round to our page size) | |
2597 | * and we don't need to send pages that have already been sent. | |
2598 | */ | |
2599 | static void migrate_handle_rp_req_pages(MigrationState *ms, const char* rbname, | |
2600 | ram_addr_t start, size_t len) | |
2601 | { | |
038adc2f | 2602 | long our_host_ps = qemu_real_host_page_size; |
6c595cde | 2603 | |
1e2d90eb | 2604 | trace_migrate_handle_rp_req_pages(rbname, start, len); |
6c595cde DDAG |
2605 | |
2606 | /* | |
2607 | * Since we currently insist on matching page sizes, just sanity check | |
2608 | * we're being asked for whole host pages. | |
2609 | */ | |
395cb450 BY |
2610 | if (start & (our_host_ps - 1) || |
2611 | (len & (our_host_ps - 1))) { | |
6c595cde DDAG |
2612 | error_report("%s: Misaligned page request, start: " RAM_ADDR_FMT |
2613 | " len: %zd", __func__, start, len); | |
2614 | mark_source_rp_bad(ms); | |
2615 | return; | |
2616 | } | |
2617 | ||
96506894 | 2618 | if (ram_save_queue_pages(rbname, start, len)) { |
6c595cde DDAG |
2619 | mark_source_rp_bad(ms); |
2620 | } | |
1e2d90eb DDAG |
2621 | } |
2622 | ||
14b1742e PX |
2623 | /* Return true to retry, false to quit */ |
2624 | static bool postcopy_pause_return_path_thread(MigrationState *s) | |
2625 | { | |
2626 | trace_postcopy_pause_return_path(); | |
2627 | ||
2628 | qemu_sem_wait(&s->postcopy_pause_rp_sem); | |
2629 | ||
2630 | trace_postcopy_pause_return_path_continued(); | |
2631 | ||
2632 | return true; | |
2633 | } | |
2634 | ||
a335debb PX |
2635 | static int migrate_handle_rp_recv_bitmap(MigrationState *s, char *block_name) |
2636 | { | |
2637 | RAMBlock *block = qemu_ram_block_by_name(block_name); | |
2638 | ||
2639 | if (!block) { | |
2640 | error_report("%s: invalid block name '%s'", __func__, block_name); | |
2641 | return -EINVAL; | |
2642 | } | |
2643 | ||
2644 | /* Fetch the received bitmap and refresh the dirty bitmap */ | |
2645 | return ram_dirty_bitmap_reload(s, block); | |
2646 | } | |
2647 | ||
13955b89 PX |
2648 | static int migrate_handle_rp_resume_ack(MigrationState *s, uint32_t value) |
2649 | { | |
2650 | trace_source_return_path_thread_resume_ack(value); | |
2651 | ||
2652 | if (value != MIGRATION_RESUME_ACK_VALUE) { | |
2653 | error_report("%s: illegal resume_ack value %"PRIu32, | |
2654 | __func__, value); | |
2655 | return -1; | |
2656 | } | |
2657 | ||
2658 | /* Now both sides are active. */ | |
2659 | migrate_set_state(&s->state, MIGRATION_STATUS_POSTCOPY_RECOVER, | |
2660 | MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
2661 | ||
94190696 PX |
2662 | /* Notify send thread that time to continue send pages */ |
2663 | qemu_sem_post(&s->rp_state.rp_sem); | |
13955b89 PX |
2664 | |
2665 | return 0; | |
2666 | } | |
2667 | ||
70b20477 DDAG |
2668 | /* |
2669 | * Handles messages sent on the return path towards the source VM | |
2670 | * | |
2671 | */ | |
2672 | static void *source_return_path_thread(void *opaque) | |
2673 | { | |
2674 | MigrationState *ms = opaque; | |
2675 | QEMUFile *rp = ms->rp_state.from_dst_file; | |
2676 | uint16_t header_len, header_type; | |
568b01ca | 2677 | uint8_t buf[512]; |
70b20477 | 2678 | uint32_t tmp32, sibling_error; |
1e2d90eb DDAG |
2679 | ram_addr_t start = 0; /* =0 to silence warning */ |
2680 | size_t len = 0, expected_len; | |
70b20477 DDAG |
2681 | int res; |
2682 | ||
2683 | trace_source_return_path_thread_entry(); | |
74637e6f | 2684 | rcu_register_thread(); |
14b1742e PX |
2685 | |
2686 | retry: | |
70b20477 DDAG |
2687 | while (!ms->rp_state.error && !qemu_file_get_error(rp) && |
2688 | migration_is_setup_or_active(ms->state)) { | |
2689 | trace_source_return_path_thread_loop_top(); | |
2690 | header_type = qemu_get_be16(rp); | |
2691 | header_len = qemu_get_be16(rp); | |
2692 | ||
7a9ddfbf PX |
2693 | if (qemu_file_get_error(rp)) { |
2694 | mark_source_rp_bad(ms); | |
2695 | goto out; | |
2696 | } | |
2697 | ||
70b20477 DDAG |
2698 | if (header_type >= MIG_RP_MSG_MAX || |
2699 | header_type == MIG_RP_MSG_INVALID) { | |
2700 | error_report("RP: Received invalid message 0x%04x length 0x%04x", | |
ed8b2828 | 2701 | header_type, header_len); |
70b20477 DDAG |
2702 | mark_source_rp_bad(ms); |
2703 | goto out; | |
2704 | } | |
2705 | ||
2706 | if ((rp_cmd_args[header_type].len != -1 && | |
2707 | header_len != rp_cmd_args[header_type].len) || | |
568b01ca | 2708 | header_len > sizeof(buf)) { |
70b20477 | 2709 | error_report("RP: Received '%s' message (0x%04x) with" |
ed8b2828 MZ |
2710 | "incorrect length %d expecting %zu", |
2711 | rp_cmd_args[header_type].name, header_type, header_len, | |
2712 | (size_t)rp_cmd_args[header_type].len); | |
70b20477 DDAG |
2713 | mark_source_rp_bad(ms); |
2714 | goto out; | |
2715 | } | |
2716 | ||
2717 | /* We know we've got a valid header by this point */ | |
2718 | res = qemu_get_buffer(rp, buf, header_len); | |
2719 | if (res != header_len) { | |
2720 | error_report("RP: Failed reading data for message 0x%04x" | |
2721 | " read %d expected %d", | |
2722 | header_type, res, header_len); | |
2723 | mark_source_rp_bad(ms); | |
2724 | goto out; | |
2725 | } | |
2726 | ||
2727 | /* OK, we have the message and the data */ | |
2728 | switch (header_type) { | |
2729 | case MIG_RP_MSG_SHUT: | |
4d885131 | 2730 | sibling_error = ldl_be_p(buf); |
70b20477 DDAG |
2731 | trace_source_return_path_thread_shut(sibling_error); |
2732 | if (sibling_error) { | |
2733 | error_report("RP: Sibling indicated error %d", sibling_error); | |
2734 | mark_source_rp_bad(ms); | |
2735 | } | |
2736 | /* | |
2737 | * We'll let the main thread deal with closing the RP | |
2738 | * we could do a shutdown(2) on it, but we're the only user | |
2739 | * anyway, so there's nothing gained. | |
2740 | */ | |
2741 | goto out; | |
2742 | ||
2743 | case MIG_RP_MSG_PONG: | |
4d885131 | 2744 | tmp32 = ldl_be_p(buf); |
70b20477 DDAG |
2745 | trace_source_return_path_thread_pong(tmp32); |
2746 | break; | |
2747 | ||
1e2d90eb | 2748 | case MIG_RP_MSG_REQ_PAGES: |
4d885131 PM |
2749 | start = ldq_be_p(buf); |
2750 | len = ldl_be_p(buf + 8); | |
1e2d90eb DDAG |
2751 | migrate_handle_rp_req_pages(ms, NULL, start, len); |
2752 | break; | |
2753 | ||
2754 | case MIG_RP_MSG_REQ_PAGES_ID: | |
2755 | expected_len = 12 + 1; /* header + termination */ | |
2756 | ||
2757 | if (header_len >= expected_len) { | |
4d885131 PM |
2758 | start = ldq_be_p(buf); |
2759 | len = ldl_be_p(buf + 8); | |
1e2d90eb DDAG |
2760 | /* Now we expect an idstr */ |
2761 | tmp32 = buf[12]; /* Length of the following idstr */ | |
2762 | buf[13 + tmp32] = '\0'; | |
2763 | expected_len += tmp32; | |
2764 | } | |
2765 | if (header_len != expected_len) { | |
2766 | error_report("RP: Req_Page_id with length %d expecting %zd", | |
ed8b2828 | 2767 | header_len, expected_len); |
1e2d90eb DDAG |
2768 | mark_source_rp_bad(ms); |
2769 | goto out; | |
2770 | } | |
2771 | migrate_handle_rp_req_pages(ms, (char *)&buf[13], start, len); | |
2772 | break; | |
2773 | ||
a335debb PX |
2774 | case MIG_RP_MSG_RECV_BITMAP: |
2775 | if (header_len < 1) { | |
2776 | error_report("%s: missing block name", __func__); | |
2777 | mark_source_rp_bad(ms); | |
2778 | goto out; | |
2779 | } | |
2780 | /* Format: len (1B) + idstr (<255B). This ends the idstr. */ | |
2781 | buf[buf[0] + 1] = '\0'; | |
2782 | if (migrate_handle_rp_recv_bitmap(ms, (char *)(buf + 1))) { | |
2783 | mark_source_rp_bad(ms); | |
2784 | goto out; | |
2785 | } | |
2786 | break; | |
2787 | ||
13955b89 PX |
2788 | case MIG_RP_MSG_RESUME_ACK: |
2789 | tmp32 = ldl_be_p(buf); | |
2790 | if (migrate_handle_rp_resume_ack(ms, tmp32)) { | |
2791 | mark_source_rp_bad(ms); | |
2792 | goto out; | |
2793 | } | |
2794 | break; | |
2795 | ||
70b20477 DDAG |
2796 | default: |
2797 | break; | |
2798 | } | |
2799 | } | |
14b1742e PX |
2800 | |
2801 | out: | |
2802 | res = qemu_file_get_error(rp); | |
2803 | if (res) { | |
fb14a42a | 2804 | if (res == -EIO && migration_in_postcopy()) { |
14b1742e PX |
2805 | /* |
2806 | * Maybe there is something we can do: it looks like a | |
2807 | * network down issue, and we pause for a recovery. | |
2808 | */ | |
2809 | if (postcopy_pause_return_path_thread(ms)) { | |
2810 | /* Reload rp, reset the rest */ | |
0284a2a8 MAL |
2811 | if (rp != ms->rp_state.from_dst_file) { |
2812 | qemu_fclose(rp); | |
2813 | rp = ms->rp_state.from_dst_file; | |
2814 | } | |
14b1742e PX |
2815 | ms->rp_state.error = false; |
2816 | goto retry; | |
2817 | } | |
2818 | } | |
2819 | ||
70b20477 DDAG |
2820 | trace_source_return_path_thread_bad_end(); |
2821 | mark_source_rp_bad(ms); | |
2822 | } | |
2823 | ||
2824 | trace_source_return_path_thread_end(); | |
70b20477 DDAG |
2825 | ms->rp_state.from_dst_file = NULL; |
2826 | qemu_fclose(rp); | |
74637e6f | 2827 | rcu_unregister_thread(); |
70b20477 DDAG |
2828 | return NULL; |
2829 | } | |
2830 | ||
d3e35b8f PX |
2831 | static int open_return_path_on_source(MigrationState *ms, |
2832 | bool create_thread) | |
70b20477 DDAG |
2833 | { |
2834 | ||
89a02a9f | 2835 | ms->rp_state.from_dst_file = qemu_file_get_return_path(ms->to_dst_file); |
70b20477 DDAG |
2836 | if (!ms->rp_state.from_dst_file) { |
2837 | return -1; | |
2838 | } | |
2839 | ||
2840 | trace_open_return_path_on_source(); | |
d3e35b8f PX |
2841 | |
2842 | if (!create_thread) { | |
2843 | /* We're done */ | |
2844 | return 0; | |
2845 | } | |
2846 | ||
70b20477 DDAG |
2847 | qemu_thread_create(&ms->rp_state.rp_thread, "return path", |
2848 | source_return_path_thread, ms, QEMU_THREAD_JOINABLE); | |
2849 | ||
2850 | trace_open_return_path_on_source_continue(); | |
2851 | ||
2852 | return 0; | |
2853 | } | |
2854 | ||
70b20477 DDAG |
2855 | /* Returns 0 if the RP was ok, otherwise there was an error on the RP */ |
2856 | static int await_return_path_close_on_source(MigrationState *ms) | |
2857 | { | |
2858 | /* | |
2859 | * If this is a normal exit then the destination will send a SHUT and the | |
2860 | * rp_thread will exit, however if there's an error we need to cause | |
2861 | * it to exit. | |
2862 | */ | |
89a02a9f | 2863 | if (qemu_file_get_error(ms->to_dst_file) && ms->rp_state.from_dst_file) { |
70b20477 DDAG |
2864 | /* |
2865 | * shutdown(2), if we have it, will cause it to unblock if it's stuck | |
2866 | * waiting for the destination. | |
2867 | */ | |
2868 | qemu_file_shutdown(ms->rp_state.from_dst_file); | |
2869 | mark_source_rp_bad(ms); | |
2870 | } | |
2871 | trace_await_return_path_close_on_source_joining(); | |
2872 | qemu_thread_join(&ms->rp_state.rp_thread); | |
2873 | trace_await_return_path_close_on_source_close(); | |
2874 | return ms->rp_state.error; | |
2875 | } | |
2876 | ||
1d34e4bf DDAG |
2877 | /* |
2878 | * Switch from normal iteration to postcopy | |
2879 | * Returns non-0 on error | |
2880 | */ | |
7287cbd4 | 2881 | static int postcopy_start(MigrationState *ms) |
1d34e4bf DDAG |
2882 | { |
2883 | int ret; | |
61b67d47 DB |
2884 | QIOChannelBuffer *bioc; |
2885 | QEMUFile *fb; | |
1d34e4bf | 2886 | int64_t time_at_stop = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
7e555c6c | 2887 | int64_t bandwidth = migrate_max_postcopy_bandwidth(); |
ef8d6488 | 2888 | bool restart_block = false; |
0331c8ca DDAG |
2889 | int cur_state = MIGRATION_STATUS_ACTIVE; |
2890 | if (!migrate_pause_before_switchover()) { | |
2891 | migrate_set_state(&ms->state, MIGRATION_STATUS_ACTIVE, | |
2892 | MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
2893 | } | |
1d34e4bf DDAG |
2894 | |
2895 | trace_postcopy_start(); | |
2896 | qemu_mutex_lock_iothread(); | |
2897 | trace_postcopy_start_set_run(); | |
2898 | ||
fb064112 | 2899 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); |
1d34e4bf DDAG |
2900 | global_state_store(); |
2901 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); | |
76b1c7fe KW |
2902 | if (ret < 0) { |
2903 | goto fail; | |
2904 | } | |
1d34e4bf | 2905 | |
0331c8ca DDAG |
2906 | ret = migration_maybe_pause(ms, &cur_state, |
2907 | MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
2908 | if (ret < 0) { | |
2909 | goto fail; | |
2910 | } | |
2911 | ||
76b1c7fe | 2912 | ret = bdrv_inactivate_all(); |
1d34e4bf DDAG |
2913 | if (ret < 0) { |
2914 | goto fail; | |
2915 | } | |
ef8d6488 | 2916 | restart_block = true; |
1d34e4bf | 2917 | |
1c0d249d DDAG |
2918 | /* |
2919 | * Cause any non-postcopiable, but iterative devices to | |
2920 | * send out their final data. | |
2921 | */ | |
a1fbe750 | 2922 | qemu_savevm_state_complete_precopy(ms->to_dst_file, true, false); |
1c0d249d | 2923 | |
1d34e4bf DDAG |
2924 | /* |
2925 | * in Finish migrate and with the io-lock held everything should | |
2926 | * be quiet, but we've potentially still got dirty pages and we | |
2927 | * need to tell the destination to throw any pages it's already received | |
2928 | * that are dirty | |
2929 | */ | |
58110f0a VSO |
2930 | if (migrate_postcopy_ram()) { |
2931 | if (ram_postcopy_send_discard_bitmap(ms)) { | |
2932 | error_report("postcopy send discard bitmap failed"); | |
2933 | goto fail; | |
2934 | } | |
1d34e4bf DDAG |
2935 | } |
2936 | ||
2937 | /* | |
2938 | * send rest of state - note things that are doing postcopy | |
2939 | * will notice we're in POSTCOPY_ACTIVE and not actually | |
2940 | * wrap their state up here | |
2941 | */ | |
7e555c6c DDAG |
2942 | /* 0 max-postcopy-bandwidth means unlimited */ |
2943 | if (!bandwidth) { | |
2944 | qemu_file_set_rate_limit(ms->to_dst_file, INT64_MAX); | |
2945 | } else { | |
2946 | qemu_file_set_rate_limit(ms->to_dst_file, bandwidth / XFER_LIMIT_RATIO); | |
2947 | } | |
58110f0a VSO |
2948 | if (migrate_postcopy_ram()) { |
2949 | /* Ping just for debugging, helps line traces up */ | |
2950 | qemu_savevm_send_ping(ms->to_dst_file, 2); | |
2951 | } | |
1d34e4bf DDAG |
2952 | |
2953 | /* | |
2954 | * While loading the device state we may trigger page transfer | |
2955 | * requests and the fd must be free to process those, and thus | |
2956 | * the destination must read the whole device state off the fd before | |
2957 | * it starts processing it. Unfortunately the ad-hoc migration format | |
2958 | * doesn't allow the destination to know the size to read without fully | |
2959 | * parsing it through each devices load-state code (especially the open | |
2960 | * coded devices that use get/put). | |
2961 | * So we wrap the device state up in a package with a length at the start; | |
2962 | * to do this we use a qemu_buf to hold the whole of the device state. | |
2963 | */ | |
61b67d47 | 2964 | bioc = qio_channel_buffer_new(4096); |
6f01f136 | 2965 | qio_channel_set_name(QIO_CHANNEL(bioc), "migration-postcopy-buffer"); |
61b67d47 DB |
2966 | fb = qemu_fopen_channel_output(QIO_CHANNEL(bioc)); |
2967 | object_unref(OBJECT(bioc)); | |
1d34e4bf | 2968 | |
c76201ab DDAG |
2969 | /* |
2970 | * Make sure the receiver can get incoming pages before we send the rest | |
2971 | * of the state | |
2972 | */ | |
2973 | qemu_savevm_send_postcopy_listen(fb); | |
2974 | ||
a1fbe750 | 2975 | qemu_savevm_state_complete_precopy(fb, false, false); |
58110f0a VSO |
2976 | if (migrate_postcopy_ram()) { |
2977 | qemu_savevm_send_ping(fb, 3); | |
2978 | } | |
1d34e4bf DDAG |
2979 | |
2980 | qemu_savevm_send_postcopy_run(fb); | |
2981 | ||
2982 | /* <><> end of stuff going into the package */ | |
1d34e4bf | 2983 | |
ef8d6488 DDAG |
2984 | /* Last point of recovery; as soon as we send the package the destination |
2985 | * can open devices and potentially start running. | |
2986 | * Lets just check again we've not got any errors. | |
2987 | */ | |
2988 | ret = qemu_file_get_error(ms->to_dst_file); | |
2989 | if (ret) { | |
2990 | error_report("postcopy_start: Migration stream errored (pre package)"); | |
2991 | goto fail_closefb; | |
2992 | } | |
2993 | ||
2994 | restart_block = false; | |
2995 | ||
1d34e4bf | 2996 | /* Now send that blob */ |
61b67d47 | 2997 | if (qemu_savevm_send_packaged(ms->to_dst_file, bioc->data, bioc->usage)) { |
1d34e4bf DDAG |
2998 | goto fail_closefb; |
2999 | } | |
3000 | qemu_fclose(fb); | |
b82fc321 DDAG |
3001 | |
3002 | /* Send a notify to give a chance for anything that needs to happen | |
3003 | * at the transition to postcopy and after the device state; in particular | |
3004 | * spice needs to trigger a transition now | |
3005 | */ | |
3006 | ms->postcopy_after_devices = true; | |
3007 | notifier_list_notify(&migration_state_notifiers, ms); | |
3008 | ||
1d34e4bf DDAG |
3009 | ms->downtime = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) - time_at_stop; |
3010 | ||
3011 | qemu_mutex_unlock_iothread(); | |
3012 | ||
58110f0a VSO |
3013 | if (migrate_postcopy_ram()) { |
3014 | /* | |
3015 | * Although this ping is just for debug, it could potentially be | |
3016 | * used for getting a better measurement of downtime at the source. | |
3017 | */ | |
3018 | qemu_savevm_send_ping(ms->to_dst_file, 4); | |
3019 | } | |
1d34e4bf | 3020 | |
ced1c616 PB |
3021 | if (migrate_release_ram()) { |
3022 | ram_postcopy_migrated_memory_release(ms); | |
3023 | } | |
3024 | ||
89a02a9f | 3025 | ret = qemu_file_get_error(ms->to_dst_file); |
1d34e4bf DDAG |
3026 | if (ret) { |
3027 | error_report("postcopy_start: Migration stream errored"); | |
48781e5b | 3028 | migrate_set_state(&ms->state, MIGRATION_STATUS_POSTCOPY_ACTIVE, |
1d34e4bf DDAG |
3029 | MIGRATION_STATUS_FAILED); |
3030 | } | |
3031 | ||
3032 | return ret; | |
3033 | ||
3034 | fail_closefb: | |
3035 | qemu_fclose(fb); | |
3036 | fail: | |
48781e5b | 3037 | migrate_set_state(&ms->state, MIGRATION_STATUS_POSTCOPY_ACTIVE, |
1d34e4bf | 3038 | MIGRATION_STATUS_FAILED); |
ef8d6488 DDAG |
3039 | if (restart_block) { |
3040 | /* A failure happened early enough that we know the destination hasn't | |
3041 | * accessed block devices, so we're safe to recover. | |
3042 | */ | |
3043 | Error *local_err = NULL; | |
3044 | ||
3045 | bdrv_invalidate_cache_all(&local_err); | |
3046 | if (local_err) { | |
3047 | error_report_err(local_err); | |
3048 | } | |
3049 | } | |
1d34e4bf DDAG |
3050 | qemu_mutex_unlock_iothread(); |
3051 | return -1; | |
3052 | } | |
3053 | ||
e91d8951 DDAG |
3054 | /** |
3055 | * migration_maybe_pause: Pause if required to by | |
3056 | * migrate_pause_before_switchover called with the iothread locked | |
3057 | * Returns: 0 on success | |
3058 | */ | |
0331c8ca DDAG |
3059 | static int migration_maybe_pause(MigrationState *s, |
3060 | int *current_active_state, | |
3061 | int new_state) | |
e91d8951 DDAG |
3062 | { |
3063 | if (!migrate_pause_before_switchover()) { | |
3064 | return 0; | |
3065 | } | |
3066 | ||
3067 | /* Since leaving this state is not atomic with posting the semaphore | |
3068 | * it's possible that someone could have issued multiple migrate_continue | |
3069 | * and the semaphore is incorrectly positive at this point; | |
3070 | * the docs say it's undefined to reinit a semaphore that's already | |
3071 | * init'd, so use timedwait to eat up any existing posts. | |
3072 | */ | |
3073 | while (qemu_sem_timedwait(&s->pause_sem, 1) == 0) { | |
3074 | /* This block intentionally left blank */ | |
3075 | } | |
3076 | ||
8958338b ZF |
3077 | /* |
3078 | * If the migration is cancelled when it is in the completion phase, | |
3079 | * the migration state is set to MIGRATION_STATUS_CANCELLING. | |
3080 | * So we don't need to wait a semaphore, otherwise we would always | |
3081 | * wait for the 'pause_sem' semaphore. | |
3082 | */ | |
3083 | if (s->state != MIGRATION_STATUS_CANCELLING) { | |
3084 | qemu_mutex_unlock_iothread(); | |
3085 | migrate_set_state(&s->state, *current_active_state, | |
3086 | MIGRATION_STATUS_PRE_SWITCHOVER); | |
3087 | qemu_sem_wait(&s->pause_sem); | |
3088 | migrate_set_state(&s->state, MIGRATION_STATUS_PRE_SWITCHOVER, | |
3089 | new_state); | |
3090 | *current_active_state = new_state; | |
3091 | qemu_mutex_lock_iothread(); | |
3092 | } | |
e91d8951 | 3093 | |
0331c8ca | 3094 | return s->state == new_state ? 0 : -EINVAL; |
e91d8951 DDAG |
3095 | } |
3096 | ||
09f6c85e DDAG |
3097 | /** |
3098 | * migration_completion: Used by migration_thread when there's not much left. | |
3099 | * The caller 'breaks' the loop when this returns. | |
3100 | * | |
3101 | * @s: Current migration state | |
09f6c85e | 3102 | */ |
2ad87305 | 3103 | static void migration_completion(MigrationState *s) |
09f6c85e DDAG |
3104 | { |
3105 | int ret; | |
2ad87305 | 3106 | int current_active_state = s->state; |
09f6c85e | 3107 | |
b10ac0c4 DDAG |
3108 | if (s->state == MIGRATION_STATUS_ACTIVE) { |
3109 | qemu_mutex_lock_iothread(); | |
64909f97 | 3110 | s->downtime_start = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
fb064112 | 3111 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); |
7287cbd4 | 3112 | s->vm_was_running = runstate_is_running(); |
b10ac0c4 DDAG |
3113 | ret = global_state_store(); |
3114 | ||
3115 | if (!ret) { | |
a1fbe750 | 3116 | bool inactivate = !migrate_colo_enabled(); |
b10ac0c4 | 3117 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); |
626ff651 | 3118 | trace_migration_completion_vm_stop(ret); |
e91d8951 | 3119 | if (ret >= 0) { |
0331c8ca DDAG |
3120 | ret = migration_maybe_pause(s, ¤t_active_state, |
3121 | MIGRATION_STATUS_DEVICE); | |
e91d8951 | 3122 | } |
f07fa4cb KW |
3123 | if (ret >= 0) { |
3124 | qemu_file_set_rate_limit(s->to_dst_file, INT64_MAX); | |
a1fbe750 FZ |
3125 | ret = qemu_savevm_state_complete_precopy(s->to_dst_file, false, |
3126 | inactivate); | |
f07fa4cb | 3127 | } |
a1fbe750 FZ |
3128 | if (inactivate && ret >= 0) { |
3129 | s->block_inactive = true; | |
b10ac0c4 DDAG |
3130 | } |
3131 | } | |
3132 | qemu_mutex_unlock_iothread(); | |
09f6c85e | 3133 | |
b10ac0c4 DDAG |
3134 | if (ret < 0) { |
3135 | goto fail; | |
09f6c85e | 3136 | } |
b10ac0c4 DDAG |
3137 | } else if (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { |
3138 | trace_migration_completion_postcopy_end(); | |
3139 | ||
89a02a9f | 3140 | qemu_savevm_state_complete_postcopy(s->to_dst_file); |
b10ac0c4 | 3141 | trace_migration_completion_postcopy_end_after_complete(); |
6ba11211 LM |
3142 | } else if (s->state == MIGRATION_STATUS_CANCELLING) { |
3143 | goto fail; | |
09f6c85e | 3144 | } |
09f6c85e | 3145 | |
b10ac0c4 DDAG |
3146 | /* |
3147 | * If rp was opened we must clean up the thread before | |
3148 | * cleaning everything else up (since if there are no failures | |
3149 | * it will wait for the destination to send it's status in | |
3150 | * a SHUT command). | |
b10ac0c4 | 3151 | */ |
0425dc97 | 3152 | if (s->rp_state.from_dst_file) { |
b10ac0c4 | 3153 | int rp_error; |
0425dc97 | 3154 | trace_migration_return_path_end_before(); |
b10ac0c4 | 3155 | rp_error = await_return_path_close_on_source(s); |
0425dc97 | 3156 | trace_migration_return_path_end_after(rp_error); |
b10ac0c4 | 3157 | if (rp_error) { |
fe904ea8 | 3158 | goto fail_invalidate; |
b10ac0c4 | 3159 | } |
09f6c85e DDAG |
3160 | } |
3161 | ||
89a02a9f | 3162 | if (qemu_file_get_error(s->to_dst_file)) { |
09f6c85e | 3163 | trace_migration_completion_file_err(); |
fe904ea8 | 3164 | goto fail_invalidate; |
09f6c85e DDAG |
3165 | } |
3166 | ||
0b827d5e HZ |
3167 | if (!migrate_colo_enabled()) { |
3168 | migrate_set_state(&s->state, current_active_state, | |
3169 | MIGRATION_STATUS_COMPLETED); | |
3170 | } | |
3171 | ||
09f6c85e DDAG |
3172 | return; |
3173 | ||
fe904ea8 GK |
3174 | fail_invalidate: |
3175 | /* If not doing postcopy, vm_start() will be called: let's regain | |
3176 | * control on images. | |
3177 | */ | |
6039dd5b DDAG |
3178 | if (s->state == MIGRATION_STATUS_ACTIVE || |
3179 | s->state == MIGRATION_STATUS_DEVICE) { | |
fe904ea8 GK |
3180 | Error *local_err = NULL; |
3181 | ||
1d2acc31 | 3182 | qemu_mutex_lock_iothread(); |
fe904ea8 GK |
3183 | bdrv_invalidate_cache_all(&local_err); |
3184 | if (local_err) { | |
3185 | error_report_err(local_err); | |
1d2acc31 HZ |
3186 | } else { |
3187 | s->block_inactive = false; | |
fe904ea8 | 3188 | } |
1d2acc31 | 3189 | qemu_mutex_unlock_iothread(); |
fe904ea8 GK |
3190 | } |
3191 | ||
09f6c85e | 3192 | fail: |
48781e5b HZ |
3193 | migrate_set_state(&s->state, current_active_state, |
3194 | MIGRATION_STATUS_FAILED); | |
09f6c85e DDAG |
3195 | } |
3196 | ||
8518278a AG |
3197 | /** |
3198 | * bg_migration_completion: Used by bg_migration_thread when after all the | |
3199 | * RAM has been saved. The caller 'breaks' the loop when this returns. | |
3200 | * | |
3201 | * @s: Current migration state | |
3202 | */ | |
3203 | static void bg_migration_completion(MigrationState *s) | |
3204 | { | |
3205 | int current_active_state = s->state; | |
3206 | ||
3207 | /* | |
3208 | * Stop tracking RAM writes - un-protect memory, un-register UFFD | |
3209 | * memory ranges, flush kernel wait queues and wake up threads | |
3210 | * waiting for write fault to be resolved. | |
3211 | */ | |
3212 | ram_write_tracking_stop(); | |
3213 | ||
3214 | if (s->state == MIGRATION_STATUS_ACTIVE) { | |
3215 | /* | |
3216 | * By this moment we have RAM content saved into the migration stream. | |
3217 | * The next step is to flush the non-RAM content (device state) | |
3218 | * right after the ram content. The device state has been stored into | |
3219 | * the temporary buffer before RAM saving started. | |
3220 | */ | |
3221 | qemu_put_buffer(s->to_dst_file, s->bioc->data, s->bioc->usage); | |
3222 | qemu_fflush(s->to_dst_file); | |
3223 | } else if (s->state == MIGRATION_STATUS_CANCELLING) { | |
3224 | goto fail; | |
3225 | } | |
3226 | ||
3227 | if (qemu_file_get_error(s->to_dst_file)) { | |
3228 | trace_migration_completion_file_err(); | |
3229 | goto fail; | |
3230 | } | |
3231 | ||
3232 | migrate_set_state(&s->state, current_active_state, | |
3233 | MIGRATION_STATUS_COMPLETED); | |
3234 | return; | |
3235 | ||
3236 | fail: | |
3237 | migrate_set_state(&s->state, current_active_state, | |
3238 | MIGRATION_STATUS_FAILED); | |
3239 | } | |
3240 | ||
35a6ed4f HZ |
3241 | bool migrate_colo_enabled(void) |
3242 | { | |
3243 | MigrationState *s = migrate_get_current(); | |
3244 | return s->enabled_capabilities[MIGRATION_CAPABILITY_X_COLO]; | |
3245 | } | |
3246 | ||
b23c2ade PX |
3247 | typedef enum MigThrError { |
3248 | /* No error detected */ | |
3249 | MIG_THR_ERR_NONE = 0, | |
3250 | /* Detected error, but resumed successfully */ | |
3251 | MIG_THR_ERR_RECOVERED = 1, | |
3252 | /* Detected fatal error, need to exit */ | |
3253 | MIG_THR_ERR_FATAL = 2, | |
3254 | } MigThrError; | |
3255 | ||
94190696 PX |
3256 | static int postcopy_resume_handshake(MigrationState *s) |
3257 | { | |
3258 | qemu_savevm_send_postcopy_resume(s->to_dst_file); | |
3259 | ||
3260 | while (s->state == MIGRATION_STATUS_POSTCOPY_RECOVER) { | |
3261 | qemu_sem_wait(&s->rp_state.rp_sem); | |
3262 | } | |
3263 | ||
3264 | if (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { | |
3265 | return 0; | |
3266 | } | |
3267 | ||
3268 | return -1; | |
3269 | } | |
3270 | ||
135b87b4 PX |
3271 | /* Return zero if success, or <0 for error */ |
3272 | static int postcopy_do_resume(MigrationState *s) | |
3273 | { | |
d1b8eadb PX |
3274 | int ret; |
3275 | ||
3276 | /* | |
3277 | * Call all the resume_prepare() hooks, so that modules can be | |
3278 | * ready for the migration resume. | |
3279 | */ | |
3280 | ret = qemu_savevm_state_resume_prepare(s); | |
3281 | if (ret) { | |
3282 | error_report("%s: resume_prepare() failure detected: %d", | |
3283 | __func__, ret); | |
3284 | return ret; | |
3285 | } | |
3286 | ||
3287 | /* | |
94190696 PX |
3288 | * Last handshake with destination on the resume (destination will |
3289 | * switch to postcopy-active afterwards) | |
d1b8eadb | 3290 | */ |
94190696 PX |
3291 | ret = postcopy_resume_handshake(s); |
3292 | if (ret) { | |
3293 | error_report("%s: handshake failed: %d", __func__, ret); | |
3294 | return ret; | |
3295 | } | |
d1b8eadb | 3296 | |
135b87b4 PX |
3297 | return 0; |
3298 | } | |
3299 | ||
b23c2ade PX |
3300 | /* |
3301 | * We don't return until we are in a safe state to continue current | |
3302 | * postcopy migration. Returns MIG_THR_ERR_RECOVERED if recovered, or | |
3303 | * MIG_THR_ERR_FATAL if unrecovery failure happened. | |
3304 | */ | |
3305 | static MigThrError postcopy_pause(MigrationState *s) | |
3306 | { | |
3307 | assert(s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
b23c2ade | 3308 | |
135b87b4 | 3309 | while (true) { |
62df066f PX |
3310 | QEMUFile *file; |
3311 | ||
135b87b4 PX |
3312 | /* Current channel is possibly broken. Release it. */ |
3313 | assert(s->to_dst_file); | |
62df066f PX |
3314 | qemu_mutex_lock(&s->qemu_file_lock); |
3315 | file = s->to_dst_file; | |
135b87b4 | 3316 | s->to_dst_file = NULL; |
62df066f PX |
3317 | qemu_mutex_unlock(&s->qemu_file_lock); |
3318 | ||
3319 | qemu_file_shutdown(file); | |
3320 | qemu_fclose(file); | |
b23c2ade | 3321 | |
d246ea50 PX |
3322 | migrate_set_state(&s->state, s->state, |
3323 | MIGRATION_STATUS_POSTCOPY_PAUSED); | |
3324 | ||
135b87b4 PX |
3325 | error_report("Detected IO failure for postcopy. " |
3326 | "Migration paused."); | |
b23c2ade | 3327 | |
135b87b4 PX |
3328 | /* |
3329 | * We wait until things fixed up. Then someone will setup the | |
3330 | * status back for us. | |
3331 | */ | |
3332 | while (s->state == MIGRATION_STATUS_POSTCOPY_PAUSED) { | |
3333 | qemu_sem_wait(&s->postcopy_pause_sem); | |
3334 | } | |
3335 | ||
3336 | if (s->state == MIGRATION_STATUS_POSTCOPY_RECOVER) { | |
3337 | /* Woken up by a recover procedure. Give it a shot */ | |
b23c2ade | 3338 | |
135b87b4 PX |
3339 | /* |
3340 | * Firstly, let's wake up the return path now, with a new | |
3341 | * return path channel. | |
3342 | */ | |
3343 | qemu_sem_post(&s->postcopy_pause_rp_sem); | |
3344 | ||
3345 | /* Do the resume logic */ | |
3346 | if (postcopy_do_resume(s) == 0) { | |
3347 | /* Let's continue! */ | |
3348 | trace_postcopy_pause_continued(); | |
3349 | return MIG_THR_ERR_RECOVERED; | |
3350 | } else { | |
3351 | /* | |
3352 | * Something wrong happened during the recovery, let's | |
3353 | * pause again. Pause is always better than throwing | |
3354 | * data away. | |
3355 | */ | |
3356 | continue; | |
3357 | } | |
3358 | } else { | |
3359 | /* This is not right... Time to quit. */ | |
3360 | return MIG_THR_ERR_FATAL; | |
3361 | } | |
3362 | } | |
b23c2ade PX |
3363 | } |
3364 | ||
3365 | static MigThrError migration_detect_error(MigrationState *s) | |
3366 | { | |
3367 | int ret; | |
c3c5eae6 | 3368 | int state = s->state; |
3d661c8a | 3369 | Error *local_error = NULL; |
c3c5eae6 DDAG |
3370 | |
3371 | if (state == MIGRATION_STATUS_CANCELLING || | |
3372 | state == MIGRATION_STATUS_CANCELLED) { | |
3373 | /* End the migration, but don't set the state to failed */ | |
3374 | return MIG_THR_ERR_FATAL; | |
3375 | } | |
b23c2ade PX |
3376 | |
3377 | /* Try to detect any file errors */ | |
3d661c8a | 3378 | ret = qemu_file_get_error_obj(s->to_dst_file, &local_error); |
b23c2ade PX |
3379 | if (!ret) { |
3380 | /* Everything is fine */ | |
3d661c8a | 3381 | assert(!local_error); |
b23c2ade PX |
3382 | return MIG_THR_ERR_NONE; |
3383 | } | |
3384 | ||
3d661c8a YK |
3385 | if (local_error) { |
3386 | migrate_set_error(s, local_error); | |
3387 | error_free(local_error); | |
3388 | } | |
3389 | ||
c3c5eae6 | 3390 | if (state == MIGRATION_STATUS_POSTCOPY_ACTIVE && ret == -EIO) { |
b23c2ade PX |
3391 | /* |
3392 | * For postcopy, we allow the network to be down for a | |
3393 | * while. After that, it can be continued by a | |
3394 | * recovery phase. | |
3395 | */ | |
3396 | return postcopy_pause(s); | |
3397 | } else { | |
3398 | /* | |
3399 | * For precopy (or postcopy with error outside IO), we fail | |
3400 | * with no time. | |
3401 | */ | |
c3c5eae6 | 3402 | migrate_set_state(&s->state, state, MIGRATION_STATUS_FAILED); |
b23c2ade PX |
3403 | trace_migration_thread_file_err(); |
3404 | ||
3405 | /* Time to stop the migration, now. */ | |
3406 | return MIG_THR_ERR_FATAL; | |
3407 | } | |
3408 | } | |
3409 | ||
268dcd46 | 3410 | /* How many bytes have we transferred since the beginning of the migration */ |
0c8f0efd JQ |
3411 | static uint64_t migration_total_bytes(MigrationState *s) |
3412 | { | |
b9ee2f7d | 3413 | return qemu_ftell(s->to_dst_file) + ram_counters.multifd_bytes; |
0c8f0efd JQ |
3414 | } |
3415 | ||
cf011f08 PX |
3416 | static void migration_calculate_complete(MigrationState *s) |
3417 | { | |
0c8f0efd | 3418 | uint64_t bytes = migration_total_bytes(s); |
cf011f08 | 3419 | int64_t end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
6cde6fbe | 3420 | int64_t transfer_time; |
cf011f08 PX |
3421 | |
3422 | s->total_time = end_time - s->start_time; | |
3423 | if (!s->downtime) { | |
3424 | /* | |
3425 | * It's still not set, so we are precopy migration. For | |
3426 | * postcopy, downtime is calculated during postcopy_start(). | |
3427 | */ | |
3428 | s->downtime = end_time - s->downtime_start; | |
3429 | } | |
3430 | ||
6cde6fbe JQ |
3431 | transfer_time = s->total_time - s->setup_time; |
3432 | if (transfer_time) { | |
3433 | s->mbps = ((double) bytes * 8.0) / transfer_time / 1000; | |
cf011f08 PX |
3434 | } |
3435 | } | |
3436 | ||
87f3bd87 IR |
3437 | static void update_iteration_initial_status(MigrationState *s) |
3438 | { | |
3439 | /* | |
3440 | * Update these three fields at the same time to avoid mismatch info lead | |
3441 | * wrong speed calculation. | |
3442 | */ | |
3443 | s->iteration_start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); | |
3444 | s->iteration_initial_bytes = migration_total_bytes(s); | |
3445 | s->iteration_initial_pages = ram_get_total_transferred_pages(); | |
3446 | } | |
3447 | ||
b15df1ae PX |
3448 | static void migration_update_counters(MigrationState *s, |
3449 | int64_t current_time) | |
3450 | { | |
aecbfe9c | 3451 | uint64_t transferred, transferred_pages, time_spent; |
0c8f0efd | 3452 | uint64_t current_bytes; /* bytes transferred since the beginning */ |
b15df1ae PX |
3453 | double bandwidth; |
3454 | ||
3455 | if (current_time < s->iteration_start_time + BUFFER_DELAY) { | |
3456 | return; | |
3457 | } | |
3458 | ||
0c8f0efd JQ |
3459 | current_bytes = migration_total_bytes(s); |
3460 | transferred = current_bytes - s->iteration_initial_bytes; | |
b15df1ae PX |
3461 | time_spent = current_time - s->iteration_start_time; |
3462 | bandwidth = (double)transferred / time_spent; | |
0781c1ed | 3463 | s->threshold_size = bandwidth * s->parameters.downtime_limit; |
b15df1ae PX |
3464 | |
3465 | s->mbps = (((double) transferred * 8.0) / | |
3466 | ((double) time_spent / 1000.0)) / 1000.0 / 1000.0; | |
3467 | ||
aecbfe9c XG |
3468 | transferred_pages = ram_get_total_transferred_pages() - |
3469 | s->iteration_initial_pages; | |
3470 | s->pages_per_second = (double) transferred_pages / | |
3471 | (((double) time_spent / 1000.0)); | |
3472 | ||
b15df1ae PX |
3473 | /* |
3474 | * if we haven't sent anything, we don't want to | |
3475 | * recalculate. 10000 is a small enough number for our purposes | |
3476 | */ | |
3477 | if (ram_counters.dirty_pages_rate && transferred > 10000) { | |
650af890 | 3478 | s->expected_downtime = ram_counters.remaining / bandwidth; |
b15df1ae PX |
3479 | } |
3480 | ||
3481 | qemu_file_reset_rate_limit(s->to_dst_file); | |
3482 | ||
87f3bd87 | 3483 | update_iteration_initial_status(s); |
b15df1ae PX |
3484 | |
3485 | trace_migrate_transferred(transferred, time_spent, | |
0781c1ed | 3486 | bandwidth, s->threshold_size); |
b15df1ae PX |
3487 | } |
3488 | ||
2ad87305 PX |
3489 | /* Migration thread iteration status */ |
3490 | typedef enum { | |
3491 | MIG_ITERATE_RESUME, /* Resume current iteration */ | |
3492 | MIG_ITERATE_SKIP, /* Skip current iteration */ | |
3493 | MIG_ITERATE_BREAK, /* Break the loop */ | |
3494 | } MigIterateState; | |
3495 | ||
3496 | /* | |
3497 | * Return true if continue to the next iteration directly, false | |
3498 | * otherwise. | |
3499 | */ | |
3500 | static MigIterateState migration_iteration_run(MigrationState *s) | |
3501 | { | |
47995026 | 3502 | uint64_t pending_size, pend_pre, pend_compat, pend_post; |
2ad87305 PX |
3503 | bool in_postcopy = s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE; |
3504 | ||
47995026 VSO |
3505 | qemu_savevm_state_pending(s->to_dst_file, s->threshold_size, &pend_pre, |
3506 | &pend_compat, &pend_post); | |
3507 | pending_size = pend_pre + pend_compat + pend_post; | |
2ad87305 PX |
3508 | |
3509 | trace_migrate_pending(pending_size, s->threshold_size, | |
47995026 | 3510 | pend_pre, pend_compat, pend_post); |
2ad87305 PX |
3511 | |
3512 | if (pending_size && pending_size >= s->threshold_size) { | |
3513 | /* Still a significant amount to transfer */ | |
52aec709 | 3514 | if (!in_postcopy && pend_pre <= s->threshold_size && |
d73415a3 | 3515 | qatomic_read(&s->start_postcopy)) { |
2ad87305 PX |
3516 | if (postcopy_start(s)) { |
3517 | error_report("%s: postcopy failed to start", __func__); | |
3518 | } | |
3519 | return MIG_ITERATE_SKIP; | |
3520 | } | |
3521 | /* Just another iteration step */ | |
17d9351b | 3522 | qemu_savevm_state_iterate(s->to_dst_file, in_postcopy); |
2ad87305 PX |
3523 | } else { |
3524 | trace_migration_thread_low_pending(pending_size); | |
3525 | migration_completion(s); | |
3526 | return MIG_ITERATE_BREAK; | |
3527 | } | |
3528 | ||
3529 | return MIG_ITERATE_RESUME; | |
3530 | } | |
3531 | ||
199aa6d4 PX |
3532 | static void migration_iteration_finish(MigrationState *s) |
3533 | { | |
3534 | /* If we enabled cpu throttling for auto-converge, turn it off. */ | |
3535 | cpu_throttle_stop(); | |
3536 | ||
3537 | qemu_mutex_lock_iothread(); | |
3538 | switch (s->state) { | |
3539 | case MIGRATION_STATUS_COMPLETED: | |
3540 | migration_calculate_complete(s); | |
3541 | runstate_set(RUN_STATE_POSTMIGRATE); | |
3542 | break; | |
3543 | ||
3544 | case MIGRATION_STATUS_ACTIVE: | |
3545 | /* | |
3546 | * We should really assert here, but since it's during | |
3547 | * migration, let's try to reduce the usage of assertions. | |
3548 | */ | |
3549 | if (!migrate_colo_enabled()) { | |
3550 | error_report("%s: critical error: calling COLO code without " | |
3551 | "COLO enabled", __func__); | |
3552 | } | |
3553 | migrate_start_colo_process(s); | |
3554 | /* | |
3555 | * Fixme: we will run VM in COLO no matter its old running state. | |
3556 | * After exited COLO, we will keep running. | |
3557 | */ | |
3558 | s->vm_was_running = true; | |
3559 | /* Fallthrough */ | |
3560 | case MIGRATION_STATUS_FAILED: | |
3561 | case MIGRATION_STATUS_CANCELLED: | |
57225e5f | 3562 | case MIGRATION_STATUS_CANCELLING: |
199aa6d4 PX |
3563 | if (s->vm_was_running) { |
3564 | vm_start(); | |
3565 | } else { | |
3566 | if (runstate_check(RUN_STATE_FINISH_MIGRATE)) { | |
3567 | runstate_set(RUN_STATE_POSTMIGRATE); | |
3568 | } | |
3569 | } | |
3570 | break; | |
3571 | ||
3572 | default: | |
3573 | /* Should not reach here, but if so, forgive the VM. */ | |
3574 | error_report("%s: Unknown ending state %d", __func__, s->state); | |
3575 | break; | |
3576 | } | |
fd392cfa | 3577 | migrate_fd_cleanup_schedule(s); |
199aa6d4 PX |
3578 | qemu_mutex_unlock_iothread(); |
3579 | } | |
3580 | ||
8518278a AG |
3581 | static void bg_migration_iteration_finish(MigrationState *s) |
3582 | { | |
3583 | qemu_mutex_lock_iothread(); | |
3584 | switch (s->state) { | |
3585 | case MIGRATION_STATUS_COMPLETED: | |
3586 | migration_calculate_complete(s); | |
3587 | break; | |
3588 | ||
3589 | case MIGRATION_STATUS_ACTIVE: | |
3590 | case MIGRATION_STATUS_FAILED: | |
3591 | case MIGRATION_STATUS_CANCELLED: | |
3592 | case MIGRATION_STATUS_CANCELLING: | |
3593 | break; | |
3594 | ||
3595 | default: | |
3596 | /* Should not reach here, but if so, forgive the VM. */ | |
3597 | error_report("%s: Unknown ending state %d", __func__, s->state); | |
3598 | break; | |
3599 | } | |
3600 | ||
3601 | migrate_fd_cleanup_schedule(s); | |
3602 | qemu_mutex_unlock_iothread(); | |
3603 | } | |
3604 | ||
3605 | /* | |
3606 | * Return true if continue to the next iteration directly, false | |
3607 | * otherwise. | |
3608 | */ | |
3609 | static MigIterateState bg_migration_iteration_run(MigrationState *s) | |
3610 | { | |
3611 | int res; | |
3612 | ||
3613 | res = qemu_savevm_state_iterate(s->to_dst_file, false); | |
3614 | if (res > 0) { | |
3615 | bg_migration_completion(s); | |
3616 | return MIG_ITERATE_BREAK; | |
3617 | } | |
3618 | ||
3619 | return MIG_ITERATE_RESUME; | |
3620 | } | |
3621 | ||
ad767bed DDAG |
3622 | void migration_make_urgent_request(void) |
3623 | { | |
3624 | qemu_sem_post(&migrate_get_current()->rate_limit_sem); | |
3625 | } | |
3626 | ||
3627 | void migration_consume_urgent_request(void) | |
3628 | { | |
3629 | qemu_sem_wait(&migrate_get_current()->rate_limit_sem); | |
3630 | } | |
3631 | ||
97e1e067 DDAG |
3632 | /* Returns true if the rate limiting was broken by an urgent request */ |
3633 | bool migration_rate_limit(void) | |
3634 | { | |
3635 | int64_t now = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); | |
3636 | MigrationState *s = migrate_get_current(); | |
3637 | ||
3638 | bool urgent = false; | |
3639 | migration_update_counters(s, now); | |
3640 | if (qemu_file_rate_limit(s->to_dst_file)) { | |
77386127 LS |
3641 | |
3642 | if (qemu_file_get_error(s->to_dst_file)) { | |
3643 | return false; | |
3644 | } | |
97e1e067 DDAG |
3645 | /* |
3646 | * Wait for a delay to do rate limiting OR | |
3647 | * something urgent to post the semaphore. | |
3648 | */ | |
3649 | int ms = s->iteration_start_time + BUFFER_DELAY - now; | |
3650 | trace_migration_rate_limit_pre(ms); | |
3651 | if (qemu_sem_timedwait(&s->rate_limit_sem, ms) == 0) { | |
3652 | /* | |
3653 | * We were woken by one or more urgent things but | |
3654 | * the timedwait will have consumed one of them. | |
3655 | * The service routine for the urgent wake will dec | |
3656 | * the semaphore itself for each item it consumes, | |
3657 | * so add this one we just eat back. | |
3658 | */ | |
3659 | qemu_sem_post(&s->rate_limit_sem); | |
3660 | urgent = true; | |
3661 | } | |
3662 | trace_migration_rate_limit_post(urgent); | |
3663 | } | |
3664 | return urgent; | |
3665 | } | |
3666 | ||
70b20477 DDAG |
3667 | /* |
3668 | * Master migration thread on the source VM. | |
3669 | * It drives the migration and pumps the data down the outgoing channel. | |
3670 | */ | |
5f496a1b | 3671 | static void *migration_thread(void *opaque) |
0d82d0e8 | 3672 | { |
9848a404 | 3673 | MigrationState *s = opaque; |
bc72ad67 | 3674 | int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST); |
b23c2ade | 3675 | MigThrError thr_error; |
ad767bed | 3676 | bool urgent = false; |
76f5933a | 3677 | |
ab28bd23 PB |
3678 | rcu_register_thread(); |
3679 | ||
892ae715 | 3680 | object_ref(OBJECT(s)); |
87f3bd87 | 3681 | update_iteration_initial_status(s); |
b15df1ae | 3682 | |
89a02a9f | 3683 | qemu_savevm_state_header(s->to_dst_file); |
1d34e4bf | 3684 | |
62a02658 PX |
3685 | /* |
3686 | * If we opened the return path, we need to make sure dst has it | |
3687 | * opened as well. | |
3688 | */ | |
3689 | if (s->rp_state.from_dst_file) { | |
1d34e4bf | 3690 | /* Now tell the dest that it should open its end so it can reply */ |
89a02a9f | 3691 | qemu_savevm_send_open_return_path(s->to_dst_file); |
1d34e4bf DDAG |
3692 | |
3693 | /* And do a ping that will make stuff easier to debug */ | |
89a02a9f | 3694 | qemu_savevm_send_ping(s->to_dst_file, 1); |
0425dc97 | 3695 | } |
1d34e4bf | 3696 | |
58110f0a | 3697 | if (migrate_postcopy()) { |
1d34e4bf DDAG |
3698 | /* |
3699 | * Tell the destination that we *might* want to do postcopy later; | |
3700 | * if the other end can't do postcopy it should fail now, nice and | |
3701 | * early. | |
3702 | */ | |
89a02a9f | 3703 | qemu_savevm_send_postcopy_advise(s->to_dst_file); |
1d34e4bf DDAG |
3704 | } |
3705 | ||
aad555c2 ZC |
3706 | if (migrate_colo_enabled()) { |
3707 | /* Notify migration destination that we enable COLO */ | |
3708 | qemu_savevm_send_colo_enable(s->to_dst_file); | |
3709 | } | |
3710 | ||
9907e842 | 3711 | qemu_savevm_state_setup(s->to_dst_file); |
0d82d0e8 | 3712 | |
d05de9e3 | 3713 | if (qemu_savevm_state_guest_unplug_pending()) { |
c7e0acd5 JF |
3714 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
3715 | MIGRATION_STATUS_WAIT_UNPLUG); | |
3716 | ||
3717 | while (s->state == MIGRATION_STATUS_WAIT_UNPLUG && | |
3718 | qemu_savevm_state_guest_unplug_pending()) { | |
3719 | qemu_sem_timedwait(&s->wait_unplug_sem, 250); | |
3720 | } | |
3721 | ||
3722 | migrate_set_state(&s->state, MIGRATION_STATUS_WAIT_UNPLUG, | |
3723 | MIGRATION_STATUS_ACTIVE); | |
3724 | } | |
3725 | ||
bc72ad67 | 3726 | s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start; |
48781e5b HZ |
3727 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
3728 | MIGRATION_STATUS_ACTIVE); | |
29ae8a41 | 3729 | |
9ec055ae DDAG |
3730 | trace_migration_thread_setup_complete(); |
3731 | ||
8f8d528e | 3732 | while (migration_is_active(s)) { |
ad767bed | 3733 | if (urgent || !qemu_file_rate_limit(s->to_dst_file)) { |
2ad87305 PX |
3734 | MigIterateState iter_state = migration_iteration_run(s); |
3735 | if (iter_state == MIG_ITERATE_SKIP) { | |
3736 | continue; | |
3737 | } else if (iter_state == MIG_ITERATE_BREAK) { | |
09f6c85e | 3738 | break; |
c369f40d JQ |
3739 | } |
3740 | } | |
f4410a5d | 3741 | |
b23c2ade PX |
3742 | /* |
3743 | * Try to detect any kind of failures, and see whether we | |
3744 | * should stop the migration now. | |
3745 | */ | |
3746 | thr_error = migration_detect_error(s); | |
3747 | if (thr_error == MIG_THR_ERR_FATAL) { | |
3748 | /* Stop migration */ | |
fd45ee2c | 3749 | break; |
b23c2ade PX |
3750 | } else if (thr_error == MIG_THR_ERR_RECOVERED) { |
3751 | /* | |
3752 | * Just recovered from a e.g. network failure, reset all | |
3753 | * the local variables. This is important to avoid | |
3754 | * breaking transferred_bytes and bandwidth calculation | |
3755 | */ | |
87f3bd87 | 3756 | update_iteration_initial_status(s); |
fd45ee2c | 3757 | } |
b15df1ae | 3758 | |
97e1e067 | 3759 | urgent = migration_rate_limit(); |
a3fa1d78 PB |
3760 | } |
3761 | ||
1d34e4bf | 3762 | trace_migration_thread_after_loop(); |
199aa6d4 | 3763 | migration_iteration_finish(s); |
892ae715 | 3764 | object_unref(OBJECT(s)); |
ab28bd23 | 3765 | rcu_unregister_thread(); |
0d82d0e8 JQ |
3766 | return NULL; |
3767 | } | |
3768 | ||
8518278a AG |
3769 | static void bg_migration_vm_start_bh(void *opaque) |
3770 | { | |
3771 | MigrationState *s = opaque; | |
3772 | ||
3773 | qemu_bh_delete(s->vm_start_bh); | |
3774 | s->vm_start_bh = NULL; | |
3775 | ||
3776 | vm_start(); | |
3777 | s->downtime = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) - s->downtime_start; | |
3778 | } | |
3779 | ||
3780 | /** | |
3781 | * Background snapshot thread, based on live migration code. | |
3782 | * This is an alternative implementation of live migration mechanism | |
3783 | * introduced specifically to support background snapshots. | |
3784 | * | |
3785 | * It takes advantage of userfault_fd write protection mechanism introduced | |
3786 | * in v5.7 kernel. Compared to existing dirty page logging migration much | |
3787 | * lesser stream traffic is produced resulting in smaller snapshot images, | |
3788 | * simply cause of no page duplicates can get into the stream. | |
3789 | * | |
3790 | * Another key point is that generated vmstate stream reflects machine state | |
3791 | * 'frozen' at the beginning of snapshot creation compared to dirty page logging | |
3792 | * mechanism, which effectively results in that saved snapshot is the state of VM | |
3793 | * at the end of the process. | |
3794 | */ | |
3795 | static void *bg_migration_thread(void *opaque) | |
3796 | { | |
3797 | MigrationState *s = opaque; | |
3798 | int64_t setup_start; | |
3799 | MigThrError thr_error; | |
3800 | QEMUFile *fb; | |
3801 | bool early_fail = true; | |
3802 | ||
3803 | rcu_register_thread(); | |
3804 | object_ref(OBJECT(s)); | |
3805 | ||
3806 | qemu_file_set_rate_limit(s->to_dst_file, INT64_MAX); | |
3807 | ||
3808 | setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST); | |
3809 | /* | |
3810 | * We want to save vmstate for the moment when migration has been | |
3811 | * initiated but also we want to save RAM content while VM is running. | |
3812 | * The RAM content should appear first in the vmstate. So, we first | |
3813 | * stash the non-RAM part of the vmstate to the temporary buffer, | |
3814 | * then write RAM part of the vmstate to the migration stream | |
3815 | * with vCPUs running and, finally, write stashed non-RAM part of | |
3816 | * the vmstate from the buffer to the migration stream. | |
3817 | */ | |
ecb23efe | 3818 | s->bioc = qio_channel_buffer_new(512 * 1024); |
8518278a AG |
3819 | qio_channel_set_name(QIO_CHANNEL(s->bioc), "vmstate-buffer"); |
3820 | fb = qemu_fopen_channel_output(QIO_CHANNEL(s->bioc)); | |
3821 | object_unref(OBJECT(s->bioc)); | |
3822 | ||
3823 | update_iteration_initial_status(s); | |
3824 | ||
eeccb99c AG |
3825 | /* |
3826 | * Prepare for tracking memory writes with UFFD-WP - populate | |
3827 | * RAM pages before protecting. | |
3828 | */ | |
3829 | #ifdef __linux__ | |
3830 | ram_write_tracking_prepare(); | |
3831 | #endif | |
3832 | ||
8518278a AG |
3833 | qemu_savevm_state_header(s->to_dst_file); |
3834 | qemu_savevm_state_setup(s->to_dst_file); | |
3835 | ||
3836 | if (qemu_savevm_state_guest_unplug_pending()) { | |
3837 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, | |
3838 | MIGRATION_STATUS_WAIT_UNPLUG); | |
3839 | ||
3840 | while (s->state == MIGRATION_STATUS_WAIT_UNPLUG && | |
3841 | qemu_savevm_state_guest_unplug_pending()) { | |
3842 | qemu_sem_timedwait(&s->wait_unplug_sem, 250); | |
3843 | } | |
3844 | ||
3845 | migrate_set_state(&s->state, MIGRATION_STATUS_WAIT_UNPLUG, | |
3846 | MIGRATION_STATUS_ACTIVE); | |
3847 | } else { | |
3848 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, | |
3849 | MIGRATION_STATUS_ACTIVE); | |
3850 | } | |
3851 | s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start; | |
3852 | ||
3853 | trace_migration_thread_setup_complete(); | |
3854 | s->downtime_start = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); | |
3855 | ||
3856 | qemu_mutex_lock_iothread(); | |
3857 | ||
3858 | /* | |
3859 | * If VM is currently in suspended state, then, to make a valid runstate | |
3860 | * transition in vm_stop_force_state() we need to wakeup it up. | |
3861 | */ | |
3862 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); | |
3863 | s->vm_was_running = runstate_is_running(); | |
3864 | ||
3865 | if (global_state_store()) { | |
3866 | goto fail; | |
3867 | } | |
3868 | /* Forcibly stop VM before saving state of vCPUs and devices */ | |
3869 | if (vm_stop_force_state(RUN_STATE_PAUSED)) { | |
3870 | goto fail; | |
3871 | } | |
3872 | /* | |
3873 | * Put vCPUs in sync with shadow context structures, then | |
3874 | * save their state to channel-buffer along with devices. | |
3875 | */ | |
3876 | cpu_synchronize_all_states(); | |
3877 | if (qemu_savevm_state_complete_precopy_non_iterable(fb, false, false)) { | |
3878 | goto fail; | |
3879 | } | |
ecb23efe AG |
3880 | /* |
3881 | * Since we are going to get non-iterable state data directly | |
3882 | * from s->bioc->data, explicit flush is needed here. | |
3883 | */ | |
3884 | qemu_fflush(fb); | |
3885 | ||
8518278a AG |
3886 | /* Now initialize UFFD context and start tracking RAM writes */ |
3887 | if (ram_write_tracking_start()) { | |
3888 | goto fail; | |
3889 | } | |
3890 | early_fail = false; | |
3891 | ||
3892 | /* | |
3893 | * Start VM from BH handler to avoid write-fault lock here. | |
3894 | * UFFD-WP protection for the whole RAM is already enabled so | |
3895 | * calling VM state change notifiers from vm_start() would initiate | |
3896 | * writes to virtio VQs memory which is in write-protected region. | |
3897 | */ | |
3898 | s->vm_start_bh = qemu_bh_new(bg_migration_vm_start_bh, s); | |
3899 | qemu_bh_schedule(s->vm_start_bh); | |
3900 | ||
3901 | qemu_mutex_unlock_iothread(); | |
3902 | ||
3903 | while (migration_is_active(s)) { | |
3904 | MigIterateState iter_state = bg_migration_iteration_run(s); | |
3905 | if (iter_state == MIG_ITERATE_SKIP) { | |
3906 | continue; | |
3907 | } else if (iter_state == MIG_ITERATE_BREAK) { | |
3908 | break; | |
3909 | } | |
3910 | ||
3911 | /* | |
3912 | * Try to detect any kind of failures, and see whether we | |
3913 | * should stop the migration now. | |
3914 | */ | |
3915 | thr_error = migration_detect_error(s); | |
3916 | if (thr_error == MIG_THR_ERR_FATAL) { | |
3917 | /* Stop migration */ | |
3918 | break; | |
3919 | } | |
3920 | ||
3921 | migration_update_counters(s, qemu_clock_get_ms(QEMU_CLOCK_REALTIME)); | |
3922 | } | |
3923 | ||
3924 | trace_migration_thread_after_loop(); | |
3925 | ||
3926 | fail: | |
3927 | if (early_fail) { | |
3928 | migrate_set_state(&s->state, MIGRATION_STATUS_ACTIVE, | |
3929 | MIGRATION_STATUS_FAILED); | |
3930 | qemu_mutex_unlock_iothread(); | |
3931 | } | |
3932 | ||
3933 | bg_migration_iteration_finish(s); | |
3934 | ||
3935 | qemu_fclose(fb); | |
3936 | object_unref(OBJECT(s)); | |
3937 | rcu_unregister_thread(); | |
3938 | ||
3939 | return NULL; | |
3940 | } | |
3941 | ||
cce8040b | 3942 | void migrate_fd_connect(MigrationState *s, Error *error_in) |
0d82d0e8 | 3943 | { |
00f4b572 | 3944 | Error *local_err = NULL; |
d3e35b8f PX |
3945 | int64_t rate_limit; |
3946 | bool resume = s->state == MIGRATION_STATUS_POSTCOPY_PAUSED; | |
3947 | ||
2ff30257 | 3948 | s->expected_downtime = s->parameters.downtime_limit; |
9cbc3649 MAL |
3949 | if (resume) { |
3950 | assert(s->cleanup_bh); | |
3951 | } else { | |
3952 | assert(!s->cleanup_bh); | |
3953 | s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup_bh, s); | |
3954 | } | |
cce8040b DDAG |
3955 | if (error_in) { |
3956 | migrate_fd_error(s, error_in); | |
3957 | migrate_fd_cleanup(s); | |
3958 | return; | |
3959 | } | |
0d82d0e8 | 3960 | |
d3e35b8f PX |
3961 | if (resume) { |
3962 | /* This is a resumed migration */ | |
8504ddec PX |
3963 | rate_limit = s->parameters.max_postcopy_bandwidth / |
3964 | XFER_LIMIT_RATIO; | |
d3e35b8f PX |
3965 | } else { |
3966 | /* This is a fresh new migration */ | |
3967 | rate_limit = s->parameters.max_bandwidth / XFER_LIMIT_RATIO; | |
442773ce | 3968 | |
d3e35b8f PX |
3969 | /* Notify before starting migration thread */ |
3970 | notifier_list_notify(&migration_state_notifiers, s); | |
3971 | } | |
3972 | ||
3973 | qemu_file_set_rate_limit(s->to_dst_file, rate_limit); | |
3974 | qemu_file_set_blocking(s->to_dst_file, true); | |
9287ac27 | 3975 | |
1d34e4bf | 3976 | /* |
c788ada8 PX |
3977 | * Open the return path. For postcopy, it is used exclusively. For |
3978 | * precopy, only if user specified "return-path" capability would | |
3979 | * QEMU uses the return path. | |
1d34e4bf | 3980 | */ |
c788ada8 | 3981 | if (migrate_postcopy_ram() || migrate_use_return_path()) { |
d3e35b8f | 3982 | if (open_return_path_on_source(s, !resume)) { |
1d34e4bf | 3983 | error_report("Unable to open return-path for postcopy"); |
d3e35b8f | 3984 | migrate_set_state(&s->state, s->state, MIGRATION_STATUS_FAILED); |
1d34e4bf DDAG |
3985 | migrate_fd_cleanup(s); |
3986 | return; | |
3987 | } | |
3988 | } | |
3989 | ||
d3e35b8f | 3990 | if (resume) { |
135b87b4 PX |
3991 | /* Wakeup the main migration thread to do the recovery */ |
3992 | migrate_set_state(&s->state, MIGRATION_STATUS_POSTCOPY_PAUSED, | |
3993 | MIGRATION_STATUS_POSTCOPY_RECOVER); | |
3994 | qemu_sem_post(&s->postcopy_pause_sem); | |
d3e35b8f PX |
3995 | return; |
3996 | } | |
3997 | ||
00f4b572 JQ |
3998 | if (multifd_save_setup(&local_err) != 0) { |
3999 | error_report_err(local_err); | |
f986c3d2 JQ |
4000 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
4001 | MIGRATION_STATUS_FAILED); | |
4002 | migrate_fd_cleanup(s); | |
4003 | return; | |
4004 | } | |
8518278a AG |
4005 | |
4006 | if (migrate_background_snapshot()) { | |
4007 | qemu_thread_create(&s->thread, "bg_snapshot", | |
4008 | bg_migration_thread, s, QEMU_THREAD_JOINABLE); | |
4009 | } else { | |
4010 | qemu_thread_create(&s->thread, "live_migration", | |
4011 | migration_thread, s, QEMU_THREAD_JOINABLE); | |
4012 | } | |
1d34e4bf | 4013 | s->migration_thread_running = true; |
0d82d0e8 | 4014 | } |
093e3c42 | 4015 | |
9d18af93 PX |
4016 | void migration_global_dump(Monitor *mon) |
4017 | { | |
4018 | MigrationState *ms = migrate_get_current(); | |
4019 | ||
6f0f6428 JQ |
4020 | monitor_printf(mon, "globals:\n"); |
4021 | monitor_printf(mon, "store-global-state: %s\n", | |
4022 | ms->store_global_state ? "on" : "off"); | |
4023 | monitor_printf(mon, "only-migratable: %s\n", | |
811f8652 | 4024 | only_migratable ? "on" : "off"); |
6f0f6428 JQ |
4025 | monitor_printf(mon, "send-configuration: %s\n", |
4026 | ms->send_configuration ? "on" : "off"); | |
4027 | monitor_printf(mon, "send-section-footer: %s\n", | |
4028 | ms->send_section_footer ? "on" : "off"); | |
f548222c XG |
4029 | monitor_printf(mon, "decompress-error-check: %s\n", |
4030 | ms->decompress_error_check ? "on" : "off"); | |
002cad6b PX |
4031 | monitor_printf(mon, "clear-bitmap-shift: %u\n", |
4032 | ms->clear_bitmap_shift); | |
9d18af93 PX |
4033 | } |
4034 | ||
20814758 PX |
4035 | #define DEFINE_PROP_MIG_CAP(name, x) \ |
4036 | DEFINE_PROP_BOOL(name, MigrationState, enabled_capabilities[x], false) | |
4037 | ||
5272298c PX |
4038 | static Property migration_properties[] = { |
4039 | DEFINE_PROP_BOOL("store-global-state", MigrationState, | |
4040 | store_global_state, true), | |
71dd4c1a PX |
4041 | DEFINE_PROP_BOOL("send-configuration", MigrationState, |
4042 | send_configuration, true), | |
15c38503 PX |
4043 | DEFINE_PROP_BOOL("send-section-footer", MigrationState, |
4044 | send_section_footer, true), | |
f548222c XG |
4045 | DEFINE_PROP_BOOL("decompress-error-check", MigrationState, |
4046 | decompress_error_check, true), | |
002cad6b PX |
4047 | DEFINE_PROP_UINT8("x-clear-bitmap-shift", MigrationState, |
4048 | clear_bitmap_shift, CLEAR_BITMAP_SHIFT_DEFAULT), | |
89632faf PX |
4049 | |
4050 | /* Migration parameters */ | |
741d4086 | 4051 | DEFINE_PROP_UINT8("x-compress-level", MigrationState, |
89632faf PX |
4052 | parameters.compress_level, |
4053 | DEFAULT_MIGRATE_COMPRESS_LEVEL), | |
741d4086 | 4054 | DEFINE_PROP_UINT8("x-compress-threads", MigrationState, |
89632faf PX |
4055 | parameters.compress_threads, |
4056 | DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT), | |
1d58872a XG |
4057 | DEFINE_PROP_BOOL("x-compress-wait-thread", MigrationState, |
4058 | parameters.compress_wait_thread, true), | |
741d4086 | 4059 | DEFINE_PROP_UINT8("x-decompress-threads", MigrationState, |
89632faf PX |
4060 | parameters.decompress_threads, |
4061 | DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT), | |
dc14a470 KZ |
4062 | DEFINE_PROP_UINT8("x-throttle-trigger-threshold", MigrationState, |
4063 | parameters.throttle_trigger_threshold, | |
4064 | DEFAULT_MIGRATE_THROTTLE_TRIGGER_THRESHOLD), | |
741d4086 | 4065 | DEFINE_PROP_UINT8("x-cpu-throttle-initial", MigrationState, |
89632faf PX |
4066 | parameters.cpu_throttle_initial, |
4067 | DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL), | |
741d4086 | 4068 | DEFINE_PROP_UINT8("x-cpu-throttle-increment", MigrationState, |
89632faf PX |
4069 | parameters.cpu_throttle_increment, |
4070 | DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT), | |
cbbf8182 KZ |
4071 | DEFINE_PROP_BOOL("x-cpu-throttle-tailslow", MigrationState, |
4072 | parameters.cpu_throttle_tailslow, false), | |
741d4086 | 4073 | DEFINE_PROP_SIZE("x-max-bandwidth", MigrationState, |
89632faf | 4074 | parameters.max_bandwidth, MAX_THROTTLE), |
741d4086 | 4075 | DEFINE_PROP_UINT64("x-downtime-limit", MigrationState, |
89632faf PX |
4076 | parameters.downtime_limit, |
4077 | DEFAULT_MIGRATE_SET_DOWNTIME), | |
741d4086 | 4078 | DEFINE_PROP_UINT32("x-checkpoint-delay", MigrationState, |
89632faf PX |
4079 | parameters.x_checkpoint_delay, |
4080 | DEFAULT_MIGRATE_X_CHECKPOINT_DELAY), | |
cbfd6c95 JQ |
4081 | DEFINE_PROP_UINT8("multifd-channels", MigrationState, |
4082 | parameters.multifd_channels, | |
4075fb1c | 4083 | DEFAULT_MIGRATE_MULTIFD_CHANNELS), |
96eef042 JQ |
4084 | DEFINE_PROP_MULTIFD_COMPRESSION("multifd-compression", MigrationState, |
4085 | parameters.multifd_compression, | |
4086 | DEFAULT_MIGRATE_MULTIFD_COMPRESSION), | |
9004db48 JQ |
4087 | DEFINE_PROP_UINT8("multifd-zlib-level", MigrationState, |
4088 | parameters.multifd_zlib_level, | |
4089 | DEFAULT_MIGRATE_MULTIFD_ZLIB_LEVEL), | |
6a9ad154 JQ |
4090 | DEFINE_PROP_UINT8("multifd-zstd-level", MigrationState, |
4091 | parameters.multifd_zstd_level, | |
4092 | DEFAULT_MIGRATE_MULTIFD_ZSTD_LEVEL), | |
73af8dd8 JQ |
4093 | DEFINE_PROP_SIZE("xbzrle-cache-size", MigrationState, |
4094 | parameters.xbzrle_cache_size, | |
4095 | DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE), | |
7e555c6c DDAG |
4096 | DEFINE_PROP_SIZE("max-postcopy-bandwidth", MigrationState, |
4097 | parameters.max_postcopy_bandwidth, | |
4098 | DEFAULT_MIGRATE_MAX_POSTCOPY_BANDWIDTH), | |
4cbc9c7f LQ |
4099 | DEFINE_PROP_UINT8("max-cpu-throttle", MigrationState, |
4100 | parameters.max_cpu_throttle, | |
4101 | DEFAULT_MIGRATE_MAX_CPU_THROTTLE), | |
ee3d96ba DDAG |
4102 | DEFINE_PROP_SIZE("announce-initial", MigrationState, |
4103 | parameters.announce_initial, | |
4104 | DEFAULT_MIGRATE_ANNOUNCE_INITIAL), | |
4105 | DEFINE_PROP_SIZE("announce-max", MigrationState, | |
4106 | parameters.announce_max, | |
4107 | DEFAULT_MIGRATE_ANNOUNCE_MAX), | |
4108 | DEFINE_PROP_SIZE("announce-rounds", MigrationState, | |
4109 | parameters.announce_rounds, | |
4110 | DEFAULT_MIGRATE_ANNOUNCE_ROUNDS), | |
4111 | DEFINE_PROP_SIZE("announce-step", MigrationState, | |
4112 | parameters.announce_step, | |
4113 | DEFAULT_MIGRATE_ANNOUNCE_STEP), | |
20814758 PX |
4114 | |
4115 | /* Migration capabilities */ | |
4116 | DEFINE_PROP_MIG_CAP("x-xbzrle", MIGRATION_CAPABILITY_XBZRLE), | |
4117 | DEFINE_PROP_MIG_CAP("x-rdma-pin-all", MIGRATION_CAPABILITY_RDMA_PIN_ALL), | |
4118 | DEFINE_PROP_MIG_CAP("x-auto-converge", MIGRATION_CAPABILITY_AUTO_CONVERGE), | |
4119 | DEFINE_PROP_MIG_CAP("x-zero-blocks", MIGRATION_CAPABILITY_ZERO_BLOCKS), | |
4120 | DEFINE_PROP_MIG_CAP("x-compress", MIGRATION_CAPABILITY_COMPRESS), | |
4121 | DEFINE_PROP_MIG_CAP("x-events", MIGRATION_CAPABILITY_EVENTS), | |
4122 | DEFINE_PROP_MIG_CAP("x-postcopy-ram", MIGRATION_CAPABILITY_POSTCOPY_RAM), | |
4123 | DEFINE_PROP_MIG_CAP("x-colo", MIGRATION_CAPABILITY_X_COLO), | |
4124 | DEFINE_PROP_MIG_CAP("x-release-ram", MIGRATION_CAPABILITY_RELEASE_RAM), | |
4125 | DEFINE_PROP_MIG_CAP("x-block", MIGRATION_CAPABILITY_BLOCK), | |
4126 | DEFINE_PROP_MIG_CAP("x-return-path", MIGRATION_CAPABILITY_RETURN_PATH), | |
cbfd6c95 | 4127 | DEFINE_PROP_MIG_CAP("x-multifd", MIGRATION_CAPABILITY_MULTIFD), |
6e8c25b4 AG |
4128 | DEFINE_PROP_MIG_CAP("x-background-snapshot", |
4129 | MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT), | |
20814758 | 4130 | |
5272298c PX |
4131 | DEFINE_PROP_END_OF_LIST(), |
4132 | }; | |
4133 | ||
e5cb7e76 PX |
4134 | static void migration_class_init(ObjectClass *klass, void *data) |
4135 | { | |
4136 | DeviceClass *dc = DEVICE_CLASS(klass); | |
4137 | ||
4138 | dc->user_creatable = false; | |
4f67d30b | 4139 | device_class_set_props(dc, migration_properties); |
e5cb7e76 PX |
4140 | } |
4141 | ||
b91bf5e4 MAL |
4142 | static void migration_instance_finalize(Object *obj) |
4143 | { | |
4144 | MigrationState *ms = MIGRATION_OBJ(obj); | |
4145 | MigrationParameters *params = &ms->parameters; | |
4146 | ||
87db1a7d | 4147 | qemu_mutex_destroy(&ms->error_mutex); |
62df066f | 4148 | qemu_mutex_destroy(&ms->qemu_file_lock); |
b91bf5e4 MAL |
4149 | g_free(params->tls_hostname); |
4150 | g_free(params->tls_creds); | |
c7e0acd5 | 4151 | qemu_sem_destroy(&ms->wait_unplug_sem); |
ad767bed | 4152 | qemu_sem_destroy(&ms->rate_limit_sem); |
e91d8951 | 4153 | qemu_sem_destroy(&ms->pause_sem); |
b23c2ade | 4154 | qemu_sem_destroy(&ms->postcopy_pause_sem); |
14b1742e | 4155 | qemu_sem_destroy(&ms->postcopy_pause_rp_sem); |
edd090c7 | 4156 | qemu_sem_destroy(&ms->rp_state.rp_sem); |
ab105cc1 | 4157 | error_free(ms->error); |
b91bf5e4 MAL |
4158 | } |
4159 | ||
e5cb7e76 PX |
4160 | static void migration_instance_init(Object *obj) |
4161 | { | |
4162 | MigrationState *ms = MIGRATION_OBJ(obj); | |
8b0b29dc | 4163 | MigrationParameters *params = &ms->parameters; |
e5cb7e76 PX |
4164 | |
4165 | ms->state = MIGRATION_STATUS_NONE; | |
e5cb7e76 | 4166 | ms->mbps = -1; |
aecbfe9c | 4167 | ms->pages_per_second = -1; |
e91d8951 | 4168 | qemu_sem_init(&ms->pause_sem, 0); |
87db1a7d | 4169 | qemu_mutex_init(&ms->error_mutex); |
8b0b29dc PX |
4170 | |
4171 | params->tls_hostname = g_strdup(""); | |
4172 | params->tls_creds = g_strdup(""); | |
4173 | ||
4174 | /* Set has_* up only for parameter checks */ | |
4175 | params->has_compress_level = true; | |
4176 | params->has_compress_threads = true; | |
4177 | params->has_decompress_threads = true; | |
dc14a470 | 4178 | params->has_throttle_trigger_threshold = true; |
8b0b29dc PX |
4179 | params->has_cpu_throttle_initial = true; |
4180 | params->has_cpu_throttle_increment = true; | |
cbbf8182 | 4181 | params->has_cpu_throttle_tailslow = true; |
8b0b29dc PX |
4182 | params->has_max_bandwidth = true; |
4183 | params->has_downtime_limit = true; | |
4184 | params->has_x_checkpoint_delay = true; | |
4185 | params->has_block_incremental = true; | |
cbfd6c95 | 4186 | params->has_multifd_channels = true; |
96eef042 | 4187 | params->has_multifd_compression = true; |
9004db48 | 4188 | params->has_multifd_zlib_level = true; |
6a9ad154 | 4189 | params->has_multifd_zstd_level = true; |
73af8dd8 | 4190 | params->has_xbzrle_cache_size = true; |
7e555c6c | 4191 | params->has_max_postcopy_bandwidth = true; |
4cbc9c7f | 4192 | params->has_max_cpu_throttle = true; |
ee3d96ba DDAG |
4193 | params->has_announce_initial = true; |
4194 | params->has_announce_max = true; | |
4195 | params->has_announce_rounds = true; | |
4196 | params->has_announce_step = true; | |
b23c2ade PX |
4197 | |
4198 | qemu_sem_init(&ms->postcopy_pause_sem, 0); | |
14b1742e | 4199 | qemu_sem_init(&ms->postcopy_pause_rp_sem, 0); |
edd090c7 | 4200 | qemu_sem_init(&ms->rp_state.rp_sem, 0); |
ad767bed | 4201 | qemu_sem_init(&ms->rate_limit_sem, 0); |
c7e0acd5 | 4202 | qemu_sem_init(&ms->wait_unplug_sem, 0); |
62df066f | 4203 | qemu_mutex_init(&ms->qemu_file_lock); |
8b0b29dc PX |
4204 | } |
4205 | ||
4206 | /* | |
4207 | * Return true if check pass, false otherwise. Error will be put | |
4208 | * inside errp if provided. | |
4209 | */ | |
4210 | static bool migration_object_check(MigrationState *ms, Error **errp) | |
4211 | { | |
6b19a7d9 PX |
4212 | MigrationCapabilityStatusList *head = NULL; |
4213 | /* Assuming all off */ | |
4214 | bool cap_list[MIGRATION_CAPABILITY__MAX] = { 0 }, ret; | |
4215 | int i; | |
4216 | ||
8b0b29dc PX |
4217 | if (!migrate_params_check(&ms->parameters, errp)) { |
4218 | return false; | |
4219 | } | |
4220 | ||
6b19a7d9 PX |
4221 | for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { |
4222 | if (ms->enabled_capabilities[i]) { | |
eaedde52 | 4223 | QAPI_LIST_PREPEND(head, migrate_cap_add(i, true)); |
6b19a7d9 PX |
4224 | } |
4225 | } | |
4226 | ||
4227 | ret = migrate_caps_check(cap_list, head, errp); | |
4228 | ||
4229 | /* It works with head == NULL */ | |
4230 | qapi_free_MigrationCapabilityStatusList(head); | |
4231 | ||
4232 | return ret; | |
e5cb7e76 PX |
4233 | } |
4234 | ||
4235 | static const TypeInfo migration_type = { | |
4236 | .name = TYPE_MIGRATION, | |
01f6e14c | 4237 | /* |
c8d3ff38 | 4238 | * NOTE: TYPE_MIGRATION is not really a device, as the object is |
2194abd6 | 4239 | * not created using qdev_new(), it is not attached to the qdev |
c8d3ff38 PX |
4240 | * device tree, and it is never realized. |
4241 | * | |
4242 | * TODO: Make this TYPE_OBJECT once QOM provides something like | |
4243 | * TYPE_DEVICE's "-global" properties. | |
01f6e14c | 4244 | */ |
e5cb7e76 PX |
4245 | .parent = TYPE_DEVICE, |
4246 | .class_init = migration_class_init, | |
4247 | .class_size = sizeof(MigrationClass), | |
4248 | .instance_size = sizeof(MigrationState), | |
4249 | .instance_init = migration_instance_init, | |
b91bf5e4 | 4250 | .instance_finalize = migration_instance_finalize, |
e5cb7e76 PX |
4251 | }; |
4252 | ||
4253 | static void register_migration_types(void) | |
4254 | { | |
4255 | type_register_static(&migration_type); | |
4256 | } | |
4257 | ||
4258 | type_init(register_migration_types); |