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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" |
39675fff | 62 | #include "yank_functions.h" |
065e2813 | 63 | |
7590a2ae | 64 | #define MAX_THROTTLE (128 << 20) /* Migration transfer speed throttling */ |
5bb7910a | 65 | |
5b4e1eb7 JQ |
66 | /* Amount of time to allocate to each "chunk" of bandwidth-throttled |
67 | * data. */ | |
68 | #define BUFFER_DELAY 100 | |
69 | #define XFER_LIMIT_RATIO (1000 / BUFFER_DELAY) | |
70 | ||
2ff30257 AA |
71 | /* Time in milliseconds we are allowed to stop the source, |
72 | * for sending the last part */ | |
73 | #define DEFAULT_MIGRATE_SET_DOWNTIME 300 | |
74 | ||
87c9cc1c DHB |
75 | /* Maximum migrate downtime set to 2000 seconds */ |
76 | #define MAX_MIGRATE_DOWNTIME_SECONDS 2000 | |
77 | #define MAX_MIGRATE_DOWNTIME (MAX_MIGRATE_DOWNTIME_SECONDS * 1000) | |
78 | ||
8706d2d5 LL |
79 | /* Default compression thread count */ |
80 | #define DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT 8 | |
3fcb38c2 LL |
81 | /* Default decompression thread count, usually decompression is at |
82 | * least 4 times as fast as compression.*/ | |
83 | #define DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT 2 | |
8706d2d5 LL |
84 | /*0: means nocompress, 1: best speed, ... 9: best compress ratio */ |
85 | #define DEFAULT_MIGRATE_COMPRESS_LEVEL 1 | |
1626fee3 | 86 | /* Define default autoconverge cpu throttle migration parameters */ |
dc14a470 | 87 | #define DEFAULT_MIGRATE_THROTTLE_TRIGGER_THRESHOLD 50 |
d85a31d1 JH |
88 | #define DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL 20 |
89 | #define DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT 10 | |
4cbc9c7f | 90 | #define DEFAULT_MIGRATE_MAX_CPU_THROTTLE 99 |
8706d2d5 | 91 | |
17ad9b35 | 92 | /* Migration XBZRLE default cache size */ |
73af8dd8 | 93 | #define DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE (64 * 1024 * 1024) |
17ad9b35 | 94 | |
131b2153 ZC |
95 | /* The delay time (in ms) between two COLO checkpoints */ |
96 | #define DEFAULT_MIGRATE_X_CHECKPOINT_DELAY (200 * 100) | |
4075fb1c | 97 | #define DEFAULT_MIGRATE_MULTIFD_CHANNELS 2 |
96eef042 | 98 | #define DEFAULT_MIGRATE_MULTIFD_COMPRESSION MULTIFD_COMPRESSION_NONE |
9004db48 JQ |
99 | /* 0: means nocompress, 1: best speed, ... 9: best compress ratio */ |
100 | #define DEFAULT_MIGRATE_MULTIFD_ZLIB_LEVEL 1 | |
6a9ad154 JQ |
101 | /* 0: means nocompress, 1: best speed, ... 20: best compress ratio */ |
102 | #define DEFAULT_MIGRATE_MULTIFD_ZSTD_LEVEL 1 | |
68b53591 | 103 | |
7e555c6c DDAG |
104 | /* Background transfer rate for postcopy, 0 means unlimited, note |
105 | * that page requests can still exceed this limit. | |
106 | */ | |
107 | #define DEFAULT_MIGRATE_MAX_POSTCOPY_BANDWIDTH 0 | |
108 | ||
ee3d96ba DDAG |
109 | /* |
110 | * Parameters for self_announce_delay giving a stream of RARP/ARP | |
111 | * packets after migration. | |
112 | */ | |
113 | #define DEFAULT_MIGRATE_ANNOUNCE_INITIAL 50 | |
114 | #define DEFAULT_MIGRATE_ANNOUNCE_MAX 550 | |
115 | #define DEFAULT_MIGRATE_ANNOUNCE_ROUNDS 5 | |
116 | #define DEFAULT_MIGRATE_ANNOUNCE_STEP 100 | |
117 | ||
99a0db9b GH |
118 | static NotifierList migration_state_notifiers = |
119 | NOTIFIER_LIST_INITIALIZER(migration_state_notifiers); | |
120 | ||
da6f1790 JQ |
121 | /* Messages sent on the return path from destination to source */ |
122 | enum mig_rp_message_type { | |
123 | MIG_RP_MSG_INVALID = 0, /* Must be 0 */ | |
124 | MIG_RP_MSG_SHUT, /* sibling will not send any more RP messages */ | |
125 | MIG_RP_MSG_PONG, /* Response to a PING; data (seq: be32 ) */ | |
126 | ||
127 | MIG_RP_MSG_REQ_PAGES_ID, /* data (start: be64, len: be32, id: string) */ | |
128 | MIG_RP_MSG_REQ_PAGES, /* data (start: be64, len: be32) */ | |
a335debb | 129 | MIG_RP_MSG_RECV_BITMAP, /* send recved_bitmap back to source */ |
13955b89 | 130 | MIG_RP_MSG_RESUME_ACK, /* tell source that we are ready to resume */ |
da6f1790 JQ |
131 | |
132 | MIG_RP_MSG_MAX | |
133 | }; | |
134 | ||
6e8c25b4 AG |
135 | /* Migration capabilities set */ |
136 | struct MigrateCapsSet { | |
137 | int size; /* Capability set size */ | |
138 | MigrationCapability caps[]; /* Variadic array of capabilities */ | |
139 | }; | |
140 | typedef struct MigrateCapsSet MigrateCapsSet; | |
141 | ||
142 | /* Define and initialize MigrateCapsSet */ | |
143 | #define INITIALIZE_MIGRATE_CAPS_SET(_name, ...) \ | |
144 | MigrateCapsSet _name = { \ | |
145 | .size = sizeof((int []) { __VA_ARGS__ }) / sizeof(int), \ | |
146 | .caps = { __VA_ARGS__ } \ | |
147 | } | |
148 | ||
149 | /* Background-snapshot compatibility check list */ | |
150 | static const | |
151 | INITIALIZE_MIGRATE_CAPS_SET(check_caps_background_snapshot, | |
152 | MIGRATION_CAPABILITY_POSTCOPY_RAM, | |
153 | MIGRATION_CAPABILITY_DIRTY_BITMAPS, | |
154 | MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME, | |
155 | MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE, | |
156 | MIGRATION_CAPABILITY_RETURN_PATH, | |
157 | MIGRATION_CAPABILITY_MULTIFD, | |
158 | MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER, | |
159 | MIGRATION_CAPABILITY_AUTO_CONVERGE, | |
160 | MIGRATION_CAPABILITY_RELEASE_RAM, | |
161 | MIGRATION_CAPABILITY_RDMA_PIN_ALL, | |
162 | MIGRATION_CAPABILITY_COMPRESS, | |
163 | MIGRATION_CAPABILITY_XBZRLE, | |
164 | MIGRATION_CAPABILITY_X_COLO, | |
165 | MIGRATION_CAPABILITY_VALIDATE_UUID); | |
166 | ||
17549e84 JQ |
167 | /* When we add fault tolerance, we could have several |
168 | migrations at once. For now we don't need to add | |
169 | dynamic creation of migration */ | |
170 | ||
e5cb7e76 | 171 | static MigrationState *current_migration; |
e1b1b1bc | 172 | static MigrationIncomingState *current_incoming; |
e5cb7e76 | 173 | |
3af8554b DDAG |
174 | static GSList *migration_blockers; |
175 | ||
8b0b29dc | 176 | static bool migration_object_check(MigrationState *ms, Error **errp); |
0331c8ca DDAG |
177 | static int migration_maybe_pause(MigrationState *s, |
178 | int *current_active_state, | |
179 | int new_state); | |
892ae715 | 180 | static void migrate_fd_cancel(MigrationState *s); |
8b0b29dc | 181 | |
8f8bfffc PX |
182 | static gint page_request_addr_cmp(gconstpointer ap, gconstpointer bp) |
183 | { | |
184 | uintptr_t a = (uintptr_t) ap, b = (uintptr_t) bp; | |
185 | ||
186 | return (a > b) - (a < b); | |
187 | } | |
188 | ||
e5cb7e76 PX |
189 | void migration_object_init(void) |
190 | { | |
191 | /* This can only be called once. */ | |
192 | assert(!current_migration); | |
193 | current_migration = MIGRATION_OBJ(object_new(TYPE_MIGRATION)); | |
4ffdb337 | 194 | |
e1b1b1bc PX |
195 | /* |
196 | * Init the migrate incoming object as well no matter whether | |
197 | * we'll use it or not. | |
198 | */ | |
199 | assert(!current_incoming); | |
200 | current_incoming = g_new0(MigrationIncomingState, 1); | |
201 | current_incoming->state = MIGRATION_STATUS_NONE; | |
202 | current_incoming->postcopy_remote_fds = | |
203 | g_array_new(FALSE, TRUE, sizeof(struct PostCopyFD)); | |
204 | qemu_mutex_init(¤t_incoming->rp_mutex); | |
205 | qemu_event_init(¤t_incoming->main_thread_load_event, false); | |
206 | qemu_sem_init(¤t_incoming->postcopy_pause_sem_dst, 0); | |
207 | qemu_sem_init(¤t_incoming->postcopy_pause_sem_fault, 0); | |
8f8bfffc PX |
208 | qemu_mutex_init(¤t_incoming->page_request_mutex); |
209 | current_incoming->page_requested = g_tree_new(page_request_addr_cmp); | |
e1b1b1bc | 210 | |
f9734d5d | 211 | migration_object_check(current_migration, &error_fatal); |
e0d17dfd PB |
212 | |
213 | blk_mig_init(); | |
214 | ram_mig_init(); | |
215 | dirty_bitmap_mig_init(); | |
e5cb7e76 PX |
216 | } |
217 | ||
c7c0e724 DH |
218 | void migration_cancel(void) |
219 | { | |
220 | migrate_fd_cancel(current_migration); | |
221 | } | |
222 | ||
892ae715 | 223 | void migration_shutdown(void) |
1f895604 | 224 | { |
892ae715 DDAG |
225 | /* |
226 | * Cancel the current migration - that will (eventually) | |
227 | * stop the migration using this structure | |
228 | */ | |
c7c0e724 | 229 | migration_cancel(); |
1f895604 | 230 | object_unref(OBJECT(current_migration)); |
1499ab09 VSO |
231 | |
232 | /* | |
233 | * Cancel outgoing migration of dirty bitmaps. It should | |
234 | * at least unref used block nodes. | |
235 | */ | |
236 | dirty_bitmap_mig_cancel_outgoing(); | |
237 | ||
238 | /* | |
239 | * Cancel incoming migration of dirty bitmaps. Dirty bitmaps | |
240 | * are non-critical data, and their loss never considered as | |
241 | * something serious. | |
242 | */ | |
243 | dirty_bitmap_mig_cancel_incoming(); | |
1f895604 VSO |
244 | } |
245 | ||
bca7856a | 246 | /* For outgoing */ |
859bc756 | 247 | MigrationState *migrate_get_current(void) |
17549e84 | 248 | { |
e5cb7e76 PX |
249 | /* This can only be called after the object created. */ |
250 | assert(current_migration); | |
251 | return current_migration; | |
17549e84 JQ |
252 | } |
253 | ||
bca7856a DDAG |
254 | MigrationIncomingState *migration_incoming_get_current(void) |
255 | { | |
e1b1b1bc PX |
256 | assert(current_incoming); |
257 | return current_incoming; | |
bca7856a DDAG |
258 | } |
259 | ||
260 | void migration_incoming_state_destroy(void) | |
261 | { | |
b4b076da JQ |
262 | struct MigrationIncomingState *mis = migration_incoming_get_current(); |
263 | ||
3482655b | 264 | if (mis->to_src_file) { |
660819b1 PX |
265 | /* Tell source that we are done */ |
266 | migrate_send_rp_shut(mis, qemu_file_get_error(mis->from_src_file) != 0); | |
3482655b PX |
267 | qemu_fclose(mis->to_src_file); |
268 | mis->to_src_file = NULL; | |
269 | } | |
270 | ||
660819b1 | 271 | if (mis->from_src_file) { |
39675fff | 272 | migration_ioc_unregister_yank_from_file(mis->from_src_file); |
660819b1 PX |
273 | qemu_fclose(mis->from_src_file); |
274 | mis->from_src_file = NULL; | |
275 | } | |
00fa4fc8 DDAG |
276 | if (mis->postcopy_remote_fds) { |
277 | g_array_free(mis->postcopy_remote_fds, TRUE); | |
278 | mis->postcopy_remote_fds = NULL; | |
279 | } | |
1df6ddb4 DDAG |
280 | if (mis->transport_cleanup) { |
281 | mis->transport_cleanup(mis->transport_data); | |
282 | } | |
660819b1 | 283 | |
1783c00f DDAG |
284 | qemu_event_reset(&mis->main_thread_load_event); |
285 | ||
8f8bfffc PX |
286 | if (mis->page_requested) { |
287 | g_tree_destroy(mis->page_requested); | |
288 | mis->page_requested = NULL; | |
289 | } | |
290 | ||
9aca82ba JQ |
291 | if (mis->socket_address_list) { |
292 | qapi_free_SocketAddressList(mis->socket_address_list); | |
293 | mis->socket_address_list = NULL; | |
294 | } | |
b5eea99e LS |
295 | |
296 | yank_unregister_instance(MIGRATION_YANK_INSTANCE); | |
bca7856a DDAG |
297 | } |
298 | ||
b05dc723 JQ |
299 | static void migrate_generate_event(int new_state) |
300 | { | |
301 | if (migrate_use_events()) { | |
3ab72385 | 302 | qapi_event_send_migration(new_state); |
b05dc723 JQ |
303 | } |
304 | } | |
305 | ||
0f073f44 DDAG |
306 | static bool migrate_late_block_activate(void) |
307 | { | |
308 | MigrationState *s; | |
309 | ||
310 | s = migrate_get_current(); | |
311 | ||
312 | return s->enabled_capabilities[ | |
313 | MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE]; | |
314 | } | |
315 | ||
da6f1790 JQ |
316 | /* |
317 | * Send a message on the return channel back to the source | |
318 | * of the migration. | |
319 | */ | |
d6208e35 PX |
320 | static int migrate_send_rp_message(MigrationIncomingState *mis, |
321 | enum mig_rp_message_type message_type, | |
322 | uint16_t len, void *data) | |
da6f1790 | 323 | { |
d6208e35 PX |
324 | int ret = 0; |
325 | ||
da6f1790 | 326 | trace_migrate_send_rp_message((int)message_type, len); |
37396950 | 327 | QEMU_LOCK_GUARD(&mis->rp_mutex); |
d6208e35 PX |
328 | |
329 | /* | |
330 | * It's possible that the file handle got lost due to network | |
331 | * failures. | |
332 | */ | |
333 | if (!mis->to_src_file) { | |
334 | ret = -EIO; | |
37396950 | 335 | return ret; |
d6208e35 PX |
336 | } |
337 | ||
da6f1790 JQ |
338 | qemu_put_be16(mis->to_src_file, (unsigned int)message_type); |
339 | qemu_put_be16(mis->to_src_file, len); | |
340 | qemu_put_buffer(mis->to_src_file, data, len); | |
341 | qemu_fflush(mis->to_src_file); | |
d6208e35 PX |
342 | |
343 | /* It's possible that qemu file got error during sending */ | |
344 | ret = qemu_file_get_error(mis->to_src_file); | |
345 | ||
d6208e35 | 346 | return ret; |
da6f1790 JQ |
347 | } |
348 | ||
2e2bce16 PX |
349 | /* Request one page from the source VM at the given start address. |
350 | * rb: the RAMBlock to request the page in | |
1e2d90eb DDAG |
351 | * Start: Address offset within the RB |
352 | * Len: Length in bytes required - must be a multiple of pagesize | |
353 | */ | |
7a267fc4 PX |
354 | int migrate_send_rp_message_req_pages(MigrationIncomingState *mis, |
355 | RAMBlock *rb, ram_addr_t start) | |
1e2d90eb | 356 | { |
cb8d4c8f | 357 | uint8_t bufc[12 + 1 + 255]; /* start (8), len (4), rbname up to 256 */ |
1e2d90eb | 358 | size_t msglen = 12; /* start + len */ |
2e2bce16 | 359 | size_t len = qemu_ram_pagesize(rb); |
d6208e35 | 360 | enum mig_rp_message_type msg_type; |
2e2bce16 PX |
361 | const char *rbname; |
362 | int rbname_len; | |
1e2d90eb DDAG |
363 | |
364 | *(uint64_t *)bufc = cpu_to_be64((uint64_t)start); | |
365 | *(uint32_t *)(bufc + 8) = cpu_to_be32((uint32_t)len); | |
366 | ||
2e2bce16 PX |
367 | /* |
368 | * We maintain the last ramblock that we requested for page. Note that we | |
369 | * don't need locking because this function will only be called within the | |
370 | * postcopy ram fault thread. | |
371 | */ | |
372 | if (rb != mis->last_rb) { | |
373 | mis->last_rb = rb; | |
374 | ||
375 | rbname = qemu_ram_get_idstr(rb); | |
376 | rbname_len = strlen(rbname); | |
377 | ||
1e2d90eb DDAG |
378 | assert(rbname_len < 256); |
379 | ||
380 | bufc[msglen++] = rbname_len; | |
381 | memcpy(bufc + msglen, rbname, rbname_len); | |
382 | msglen += rbname_len; | |
d6208e35 | 383 | msg_type = MIG_RP_MSG_REQ_PAGES_ID; |
1e2d90eb | 384 | } else { |
d6208e35 | 385 | msg_type = MIG_RP_MSG_REQ_PAGES; |
1e2d90eb | 386 | } |
d6208e35 PX |
387 | |
388 | return migrate_send_rp_message(mis, msg_type, msglen, bufc); | |
1e2d90eb DDAG |
389 | } |
390 | ||
7a267fc4 | 391 | int migrate_send_rp_req_pages(MigrationIncomingState *mis, |
8f8bfffc | 392 | RAMBlock *rb, ram_addr_t start, uint64_t haddr) |
7a267fc4 | 393 | { |
8f8bfffc | 394 | void *aligned = (void *)(uintptr_t)(haddr & (-qemu_ram_pagesize(rb))); |
a2429283 | 395 | bool received = false; |
8f8bfffc PX |
396 | |
397 | WITH_QEMU_LOCK_GUARD(&mis->page_request_mutex) { | |
398 | received = ramblock_recv_bitmap_test_byte_offset(rb, start); | |
399 | if (!received && !g_tree_lookup(mis->page_requested, aligned)) { | |
400 | /* | |
401 | * The page has not been received, and it's not yet in the page | |
402 | * request list. Queue it. Set the value of element to 1, so that | |
403 | * things like g_tree_lookup() will return TRUE (1) when found. | |
404 | */ | |
405 | g_tree_insert(mis->page_requested, aligned, (gpointer)1); | |
406 | mis->page_requested_count++; | |
407 | trace_postcopy_page_req_add(aligned, mis->page_requested_count); | |
408 | } | |
409 | } | |
410 | ||
411 | /* | |
412 | * If the page is there, skip sending the message. We don't even need the | |
413 | * lock because as long as the page arrived, it'll be there forever. | |
414 | */ | |
415 | if (received) { | |
416 | return 0; | |
417 | } | |
418 | ||
7a267fc4 PX |
419 | return migrate_send_rp_message_req_pages(mis, rb, start); |
420 | } | |
421 | ||
aad555c2 ZC |
422 | static bool migration_colo_enabled; |
423 | bool migration_incoming_colo_enabled(void) | |
424 | { | |
425 | return migration_colo_enabled; | |
426 | } | |
427 | ||
428 | void migration_incoming_disable_colo(void) | |
429 | { | |
18b1d3c9 | 430 | ram_block_discard_disable(false); |
aad555c2 ZC |
431 | migration_colo_enabled = false; |
432 | } | |
433 | ||
18b1d3c9 | 434 | int migration_incoming_enable_colo(void) |
aad555c2 | 435 | { |
18b1d3c9 DH |
436 | if (ram_block_discard_disable(true)) { |
437 | error_report("COLO: cannot disable RAM discard"); | |
438 | return -EBUSY; | |
439 | } | |
aad555c2 | 440 | migration_colo_enabled = true; |
18b1d3c9 | 441 | return 0; |
aad555c2 ZC |
442 | } |
443 | ||
9aca82ba JQ |
444 | void migrate_add_address(SocketAddress *address) |
445 | { | |
446 | MigrationIncomingState *mis = migration_incoming_get_current(); | |
9aca82ba | 447 | |
54aa3de7 EB |
448 | QAPI_LIST_PREPEND(mis->socket_address_list, |
449 | QAPI_CLONE(SocketAddress, address)); | |
9aca82ba JQ |
450 | } |
451 | ||
e69d50d6 | 452 | static void qemu_start_incoming_migration(const char *uri, Error **errp) |
5bb7910a | 453 | { |
d658f65c | 454 | const char *p = NULL; |
34c9dd8e | 455 | |
3ab72385 | 456 | qapi_event_send_migration(MIGRATION_STATUS_SETUP); |
e69d50d6 PB |
457 | if (strstart(uri, "tcp:", &p) || |
458 | strstart(uri, "unix:", NULL) || | |
459 | strstart(uri, "vsock:", NULL)) { | |
d658f65c | 460 | socket_start_incoming_migration(p ? p : uri, errp); |
2da776db | 461 | #ifdef CONFIG_RDMA |
adde220a | 462 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
463 | rdma_start_incoming_migration(p, errp); |
464 | #endif | |
adde220a | 465 | } else if (strstart(uri, "exec:", &p)) { |
43eaae28 | 466 | exec_start_incoming_migration(p, errp); |
adde220a | 467 | } else if (strstart(uri, "fd:", &p)) { |
43eaae28 | 468 | fd_start_incoming_migration(p, errp); |
adde220a | 469 | } else { |
312fd5f2 | 470 | error_setg(errp, "unknown migration protocol: %s", uri); |
8ca5e801 | 471 | } |
5bb7910a AL |
472 | } |
473 | ||
0aa6aefc DL |
474 | static void process_incoming_migration_bh(void *opaque) |
475 | { | |
476 | Error *local_err = NULL; | |
477 | MigrationIncomingState *mis = opaque; | |
478 | ||
0f073f44 DDAG |
479 | /* If capability late_block_activate is set: |
480 | * Only fire up the block code now if we're going to restart the | |
481 | * VM, else 'cont' will do it. | |
482 | * This causes file locking to happen; so we don't want it to happen | |
483 | * unless we really are starting the VM. | |
484 | */ | |
485 | if (!migrate_late_block_activate() || | |
486 | (autostart && (!global_state_received() || | |
487 | global_state_get_runstate() == RUN_STATE_RUNNING))) { | |
488 | /* Make sure all file formats flush their mutable metadata. | |
489 | * If we get an error here, just don't restart the VM yet. */ | |
490 | bdrv_invalidate_cache_all(&local_err); | |
491 | if (local_err) { | |
492 | error_report_err(local_err); | |
493 | local_err = NULL; | |
494 | autostart = false; | |
495 | } | |
d35ff5e6 KW |
496 | } |
497 | ||
0aa6aefc DL |
498 | /* |
499 | * This must happen after all error conditions are dealt with and | |
500 | * we're sure the VM is going to be running on this host. | |
501 | */ | |
7659505c | 502 | qemu_announce_self(&mis->announce_timer, migrate_announce_params()); |
0aa6aefc | 503 | |
f986c3d2 JQ |
504 | if (multifd_load_cleanup(&local_err) != 0) { |
505 | error_report_err(local_err); | |
506 | autostart = false; | |
507 | } | |
0aa6aefc DL |
508 | /* If global state section was not received or we are in running |
509 | state, we need to obey autostart. Any other state is set with | |
510 | runstate_set. */ | |
511 | ||
b35ebdf0 VSO |
512 | dirty_bitmap_mig_before_vm_start(); |
513 | ||
0aa6aefc DL |
514 | if (!global_state_received() || |
515 | global_state_get_runstate() == RUN_STATE_RUNNING) { | |
516 | if (autostart) { | |
517 | vm_start(); | |
518 | } else { | |
519 | runstate_set(RUN_STATE_PAUSED); | |
520 | } | |
db009729 ZC |
521 | } else if (migration_incoming_colo_enabled()) { |
522 | migration_incoming_disable_colo(); | |
523 | vm_start(); | |
0aa6aefc DL |
524 | } else { |
525 | runstate_set(global_state_get_runstate()); | |
526 | } | |
0aa6aefc DL |
527 | /* |
528 | * This must happen after any state changes since as soon as an external | |
529 | * observer sees this event they might start to prod at the VM assuming | |
530 | * it's ready to use. | |
531 | */ | |
532 | migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, | |
533 | MIGRATION_STATUS_COMPLETED); | |
534 | qemu_bh_delete(mis->bh); | |
535 | migration_incoming_state_destroy(); | |
536 | } | |
537 | ||
82a4da79 | 538 | static void process_incoming_migration_co(void *opaque) |
511c0231 | 539 | { |
b4b076da | 540 | MigrationIncomingState *mis = migration_incoming_get_current(); |
e9bef235 | 541 | PostcopyState ps; |
1c12e1f5 | 542 | int ret; |
8e48ac95 | 543 | Error *local_err = NULL; |
1c12e1f5 | 544 | |
4f0fae7f | 545 | assert(mis->from_src_file); |
92370989 | 546 | mis->migration_incoming_co = qemu_coroutine_self(); |
67f11b5c | 547 | mis->largest_page_size = qemu_ram_pagesize_largest(); |
093e3c42 | 548 | postcopy_state_set(POSTCOPY_INCOMING_NONE); |
93d7af6f HZ |
549 | migrate_set_state(&mis->state, MIGRATION_STATUS_NONE, |
550 | MIGRATION_STATUS_ACTIVE); | |
4f0fae7f | 551 | ret = qemu_loadvm_state(mis->from_src_file); |
bca7856a | 552 | |
e9bef235 DDAG |
553 | ps = postcopy_state_get(); |
554 | trace_process_incoming_migration_co_end(ret, ps); | |
555 | if (ps != POSTCOPY_INCOMING_NONE) { | |
556 | if (ps == POSTCOPY_INCOMING_ADVISE) { | |
557 | /* | |
558 | * Where a migration had postcopy enabled (and thus went to advise) | |
559 | * but managed to complete within the precopy period, we can use | |
560 | * the normal exit. | |
561 | */ | |
562 | postcopy_ram_incoming_cleanup(mis); | |
563 | } else if (ret >= 0) { | |
564 | /* | |
565 | * Postcopy was started, cleanup should happen at the end of the | |
566 | * postcopy thread. | |
567 | */ | |
568 | trace_process_incoming_migration_co_postcopy_end_main(); | |
569 | return; | |
570 | } | |
571 | /* Else if something went wrong then just fall out of the normal exit */ | |
572 | } | |
573 | ||
25d0c16f | 574 | /* we get COLO info, and know if we are in COLO mode */ |
aad555c2 | 575 | if (!ret && migration_incoming_colo_enabled()) { |
8e48ac95 ZC |
576 | /* Make sure all file formats flush their mutable metadata */ |
577 | bdrv_invalidate_cache_all(&local_err); | |
578 | if (local_err) { | |
8e48ac95 | 579 | error_report_err(local_err); |
6d99c2d4 | 580 | goto fail; |
8e48ac95 ZC |
581 | } |
582 | ||
25d0c16f HZ |
583 | qemu_thread_create(&mis->colo_incoming_thread, "COLO incoming", |
584 | colo_process_incoming_thread, mis, QEMU_THREAD_JOINABLE); | |
585 | mis->have_colo_incoming_thread = true; | |
586 | qemu_coroutine_yield(); | |
587 | ||
588 | /* Wait checkpoint incoming thread exit before free resource */ | |
589 | qemu_thread_join(&mis->colo_incoming_thread); | |
13af18f2 ZC |
590 | /* We hold the global iothread lock, so it is safe here */ |
591 | colo_release_ram_cache(); | |
25d0c16f HZ |
592 | } |
593 | ||
1c12e1f5 | 594 | if (ret < 0) { |
db80face | 595 | error_report("load of migration failed: %s", strerror(-ret)); |
6d99c2d4 | 596 | goto fail; |
511c0231 | 597 | } |
0aa6aefc DL |
598 | mis->bh = qemu_bh_new(process_incoming_migration_bh, mis); |
599 | qemu_bh_schedule(mis->bh); | |
92370989 | 600 | mis->migration_incoming_co = NULL; |
6d99c2d4 FL |
601 | return; |
602 | fail: | |
603 | local_err = NULL; | |
604 | migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, | |
605 | MIGRATION_STATUS_FAILED); | |
606 | qemu_fclose(mis->from_src_file); | |
607 | if (multifd_load_cleanup(&local_err) != 0) { | |
608 | error_report_err(local_err); | |
609 | } | |
610 | exit(EXIT_FAILURE); | |
511c0231 JQ |
611 | } |
612 | ||
b673eab4 | 613 | /** |
7d6f6933 | 614 | * migration_incoming_setup: Setup incoming migration |
b673eab4 JQ |
615 | * @f: file for main migration channel |
616 | * @errp: where to put errors | |
7d6f6933 MA |
617 | * |
618 | * Returns: %true on success, %false on error. | |
b673eab4 | 619 | */ |
7d6f6933 | 620 | static bool migration_incoming_setup(QEMUFile *f, Error **errp) |
82a4da79 | 621 | { |
4f0fae7f | 622 | MigrationIncomingState *mis = migration_incoming_get_current(); |
82a4da79 | 623 | |
7d6f6933 MA |
624 | if (multifd_load_setup(errp) != 0) { |
625 | return false; | |
f986c3d2 JQ |
626 | } |
627 | ||
4f0fae7f JQ |
628 | if (!mis->from_src_file) { |
629 | mis->from_src_file = f; | |
630 | } | |
06ad5135 | 631 | qemu_file_set_blocking(f, false); |
7d6f6933 | 632 | return true; |
e595a01a JQ |
633 | } |
634 | ||
36c2f8be | 635 | void migration_incoming_process(void) |
e595a01a JQ |
636 | { |
637 | Coroutine *co = qemu_coroutine_create(process_incoming_migration_co, NULL); | |
0b8b8753 | 638 | qemu_coroutine_enter(co); |
82a4da79 PB |
639 | } |
640 | ||
884835fa PX |
641 | /* Returns true if recovered from a paused migration, otherwise false */ |
642 | static bool postcopy_try_recover(QEMUFile *f) | |
e595a01a | 643 | { |
d96c9e8d PX |
644 | MigrationIncomingState *mis = migration_incoming_get_current(); |
645 | ||
646 | if (mis->state == MIGRATION_STATUS_POSTCOPY_PAUSED) { | |
647 | /* Resumed from a paused postcopy migration */ | |
648 | ||
649 | mis->from_src_file = f; | |
650 | /* Postcopy has standalone thread to do vm load */ | |
651 | qemu_file_set_blocking(f, true); | |
652 | ||
653 | /* Re-configure the return path */ | |
654 | mis->to_src_file = qemu_file_get_return_path(f); | |
655 | ||
656 | migrate_set_state(&mis->state, MIGRATION_STATUS_POSTCOPY_PAUSED, | |
657 | MIGRATION_STATUS_POSTCOPY_RECOVER); | |
658 | ||
659 | /* | |
660 | * Here, we only wake up the main loading thread (while the | |
661 | * fault thread will still be waiting), so that we can receive | |
662 | * commands from source now, and answer it if needed. The | |
663 | * fault thread will be woken up afterwards until we are sure | |
664 | * that source is ready to reply to page requests. | |
665 | */ | |
666 | qemu_sem_post(&mis->postcopy_pause_sem_dst); | |
884835fa PX |
667 | return true; |
668 | } | |
669 | ||
670 | return false; | |
671 | } | |
672 | ||
b673eab4 | 673 | void migration_fd_process_incoming(QEMUFile *f, Error **errp) |
884835fa PX |
674 | { |
675 | if (postcopy_try_recover(f)) { | |
676 | return; | |
d96c9e8d | 677 | } |
884835fa | 678 | |
7d6f6933 | 679 | if (!migration_incoming_setup(f, errp)) { |
b673eab4 JQ |
680 | return; |
681 | } | |
884835fa | 682 | migration_incoming_process(); |
e595a01a JQ |
683 | } |
684 | ||
49ed0d24 | 685 | void migration_ioc_process_incoming(QIOChannel *ioc, Error **errp) |
4f0fae7f JQ |
686 | { |
687 | MigrationIncomingState *mis = migration_incoming_get_current(); | |
b673eab4 | 688 | Error *local_err = NULL; |
a429e7f4 | 689 | bool start_migration; |
4f0fae7f JQ |
690 | |
691 | if (!mis->from_src_file) { | |
a429e7f4 | 692 | /* The first connection (multifd may have multiple) */ |
4f0fae7f | 693 | QEMUFile *f = qemu_fopen_channel_input(ioc); |
a429e7f4 PX |
694 | |
695 | /* If it's a recovery, we're done */ | |
884835fa PX |
696 | if (postcopy_try_recover(f)) { |
697 | return; | |
698 | } | |
a429e7f4 | 699 | |
7d6f6933 | 700 | if (!migration_incoming_setup(f, errp)) { |
b673eab4 JQ |
701 | return; |
702 | } | |
a429e7f4 PX |
703 | |
704 | /* | |
705 | * Common migration only needs one channel, so we can start | |
706 | * right now. Multifd needs more than one channel, we wait. | |
707 | */ | |
708 | start_migration = !migrate_use_multifd(); | |
709 | } else { | |
710 | /* Multiple connections */ | |
711 | assert(migrate_use_multifd()); | |
49ed0d24 FL |
712 | start_migration = multifd_recv_new_channel(ioc, &local_err); |
713 | if (local_err) { | |
714 | error_propagate(errp, local_err); | |
715 | return; | |
716 | } | |
4f0fae7f | 717 | } |
81e62053 | 718 | |
a429e7f4 | 719 | if (start_migration) { |
81e62053 PX |
720 | migration_incoming_process(); |
721 | } | |
4f0fae7f JQ |
722 | } |
723 | ||
428d8908 JQ |
724 | /** |
725 | * @migration_has_all_channels: We have received all channels that we need | |
726 | * | |
727 | * Returns true when we have got connections to all the channels that | |
728 | * we need for migration. | |
729 | */ | |
730 | bool migration_has_all_channels(void) | |
731 | { | |
ca273df3 | 732 | MigrationIncomingState *mis = migration_incoming_get_current(); |
62c1e0ca JQ |
733 | bool all_channels; |
734 | ||
735 | all_channels = multifd_recv_all_channels_created(); | |
736 | ||
ca273df3 | 737 | return all_channels && mis->from_src_file != NULL; |
428d8908 JQ |
738 | } |
739 | ||
6decec93 DDAG |
740 | /* |
741 | * Send a 'SHUT' message on the return channel with the given value | |
742 | * to indicate that we've finished with the RP. Non-0 value indicates | |
743 | * error. | |
744 | */ | |
745 | void migrate_send_rp_shut(MigrationIncomingState *mis, | |
746 | uint32_t value) | |
747 | { | |
748 | uint32_t buf; | |
749 | ||
750 | buf = cpu_to_be32(value); | |
751 | migrate_send_rp_message(mis, MIG_RP_MSG_SHUT, sizeof(buf), &buf); | |
752 | } | |
753 | ||
754 | /* | |
755 | * Send a 'PONG' message on the return channel with the given value | |
756 | * (normally in response to a 'PING') | |
757 | */ | |
758 | void migrate_send_rp_pong(MigrationIncomingState *mis, | |
759 | uint32_t value) | |
760 | { | |
761 | uint32_t buf; | |
762 | ||
763 | buf = cpu_to_be32(value); | |
764 | migrate_send_rp_message(mis, MIG_RP_MSG_PONG, sizeof(buf), &buf); | |
765 | } | |
766 | ||
a335debb PX |
767 | void migrate_send_rp_recv_bitmap(MigrationIncomingState *mis, |
768 | char *block_name) | |
769 | { | |
770 | char buf[512]; | |
771 | int len; | |
772 | int64_t res; | |
773 | ||
774 | /* | |
775 | * First, we send the header part. It contains only the len of | |
776 | * idstr, and the idstr itself. | |
777 | */ | |
778 | len = strlen(block_name); | |
779 | buf[0] = len; | |
780 | memcpy(buf + 1, block_name, len); | |
781 | ||
782 | if (mis->state != MIGRATION_STATUS_POSTCOPY_RECOVER) { | |
783 | error_report("%s: MSG_RP_RECV_BITMAP only used for recovery", | |
784 | __func__); | |
785 | return; | |
786 | } | |
787 | ||
788 | migrate_send_rp_message(mis, MIG_RP_MSG_RECV_BITMAP, len + 1, buf); | |
789 | ||
790 | /* | |
791 | * Next, we dump the received bitmap to the stream. | |
792 | * | |
793 | * TODO: currently we are safe since we are the only one that is | |
794 | * using the to_src_file handle (fault thread is still paused), | |
795 | * and it's ok even not taking the mutex. However the best way is | |
796 | * to take the lock before sending the message header, and release | |
797 | * the lock after sending the bitmap. | |
798 | */ | |
799 | qemu_mutex_lock(&mis->rp_mutex); | |
800 | res = ramblock_recv_bitmap_send(mis->to_src_file, block_name); | |
801 | qemu_mutex_unlock(&mis->rp_mutex); | |
802 | ||
803 | trace_migrate_send_rp_recv_bitmap(block_name, res); | |
804 | } | |
805 | ||
13955b89 PX |
806 | void migrate_send_rp_resume_ack(MigrationIncomingState *mis, uint32_t value) |
807 | { | |
808 | uint32_t buf; | |
809 | ||
810 | buf = cpu_to_be32(value); | |
811 | migrate_send_rp_message(mis, MIG_RP_MSG_RESUME_ACK, sizeof(buf), &buf); | |
812 | } | |
813 | ||
bbf6da32 OW |
814 | MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp) |
815 | { | |
95b3a8c8 EB |
816 | MigrationCapabilityStatusList *head = NULL, **tail = &head; |
817 | MigrationCapabilityStatus *caps; | |
bbf6da32 OW |
818 | MigrationState *s = migrate_get_current(); |
819 | int i; | |
820 | ||
7fb1cf16 | 821 | for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { |
ed1701c6 DDAG |
822 | #ifndef CONFIG_LIVE_BLOCK_MIGRATION |
823 | if (i == MIGRATION_CAPABILITY_BLOCK) { | |
824 | continue; | |
825 | } | |
826 | #endif | |
95b3a8c8 EB |
827 | caps = g_malloc0(sizeof(*caps)); |
828 | caps->capability = i; | |
829 | caps->state = s->enabled_capabilities[i]; | |
830 | QAPI_LIST_APPEND(tail, caps); | |
bbf6da32 OW |
831 | } |
832 | ||
833 | return head; | |
834 | } | |
835 | ||
85de8323 LL |
836 | MigrationParameters *qmp_query_migrate_parameters(Error **errp) |
837 | { | |
838 | MigrationParameters *params; | |
839 | MigrationState *s = migrate_get_current(); | |
840 | ||
e87fae4c | 841 | /* TODO use QAPI_CLONE() instead of duplicating it inline */ |
85de8323 | 842 | params = g_malloc0(sizeof(*params)); |
de63ab61 | 843 | params->has_compress_level = true; |
2594f56d | 844 | params->compress_level = s->parameters.compress_level; |
de63ab61 | 845 | params->has_compress_threads = true; |
2594f56d | 846 | params->compress_threads = s->parameters.compress_threads; |
1d58872a XG |
847 | params->has_compress_wait_thread = true; |
848 | params->compress_wait_thread = s->parameters.compress_wait_thread; | |
de63ab61 | 849 | params->has_decompress_threads = true; |
2594f56d | 850 | params->decompress_threads = s->parameters.decompress_threads; |
dc14a470 KZ |
851 | params->has_throttle_trigger_threshold = true; |
852 | params->throttle_trigger_threshold = s->parameters.throttle_trigger_threshold; | |
de63ab61 | 853 | params->has_cpu_throttle_initial = true; |
2594f56d | 854 | params->cpu_throttle_initial = s->parameters.cpu_throttle_initial; |
de63ab61 | 855 | params->has_cpu_throttle_increment = true; |
2594f56d | 856 | params->cpu_throttle_increment = s->parameters.cpu_throttle_increment; |
cbbf8182 KZ |
857 | params->has_cpu_throttle_tailslow = true; |
858 | params->cpu_throttle_tailslow = s->parameters.cpu_throttle_tailslow; | |
8cc99dcd | 859 | params->has_tls_creds = true; |
69ef1f36 | 860 | params->tls_creds = g_strdup(s->parameters.tls_creds); |
8cc99dcd | 861 | params->has_tls_hostname = true; |
69ef1f36 | 862 | params->tls_hostname = g_strdup(s->parameters.tls_hostname); |
d2f1d29b | 863 | params->has_tls_authz = true; |
7cd75cbd MZ |
864 | params->tls_authz = g_strdup(s->parameters.tls_authz ? |
865 | s->parameters.tls_authz : ""); | |
2ff30257 AA |
866 | params->has_max_bandwidth = true; |
867 | params->max_bandwidth = s->parameters.max_bandwidth; | |
868 | params->has_downtime_limit = true; | |
869 | params->downtime_limit = s->parameters.downtime_limit; | |
fe39a4d4 | 870 | params->has_x_checkpoint_delay = true; |
68b53591 | 871 | params->x_checkpoint_delay = s->parameters.x_checkpoint_delay; |
2833c59b JQ |
872 | params->has_block_incremental = true; |
873 | params->block_incremental = s->parameters.block_incremental; | |
cbfd6c95 JQ |
874 | params->has_multifd_channels = true; |
875 | params->multifd_channels = s->parameters.multifd_channels; | |
96eef042 JQ |
876 | params->has_multifd_compression = true; |
877 | params->multifd_compression = s->parameters.multifd_compression; | |
9004db48 JQ |
878 | params->has_multifd_zlib_level = true; |
879 | params->multifd_zlib_level = s->parameters.multifd_zlib_level; | |
6a9ad154 JQ |
880 | params->has_multifd_zstd_level = true; |
881 | params->multifd_zstd_level = s->parameters.multifd_zstd_level; | |
73af8dd8 JQ |
882 | params->has_xbzrle_cache_size = true; |
883 | params->xbzrle_cache_size = s->parameters.xbzrle_cache_size; | |
7e555c6c DDAG |
884 | params->has_max_postcopy_bandwidth = true; |
885 | params->max_postcopy_bandwidth = s->parameters.max_postcopy_bandwidth; | |
4cbc9c7f LQ |
886 | params->has_max_cpu_throttle = true; |
887 | params->max_cpu_throttle = s->parameters.max_cpu_throttle; | |
ee3d96ba DDAG |
888 | params->has_announce_initial = true; |
889 | params->announce_initial = s->parameters.announce_initial; | |
890 | params->has_announce_max = true; | |
891 | params->announce_max = s->parameters.announce_max; | |
892 | params->has_announce_rounds = true; | |
893 | params->announce_rounds = s->parameters.announce_rounds; | |
894 | params->has_announce_step = true; | |
895 | params->announce_step = s->parameters.announce_step; | |
85de8323 | 896 | |
31e4c354 HR |
897 | if (s->parameters.has_block_bitmap_mapping) { |
898 | params->has_block_bitmap_mapping = true; | |
899 | params->block_bitmap_mapping = | |
900 | QAPI_CLONE(BitmapMigrationNodeAliasList, | |
901 | s->parameters.block_bitmap_mapping); | |
902 | } | |
903 | ||
85de8323 LL |
904 | return params; |
905 | } | |
906 | ||
ee3d96ba DDAG |
907 | AnnounceParameters *migrate_announce_params(void) |
908 | { | |
909 | static AnnounceParameters ap; | |
910 | ||
911 | MigrationState *s = migrate_get_current(); | |
912 | ||
913 | ap.initial = s->parameters.announce_initial; | |
914 | ap.max = s->parameters.announce_max; | |
915 | ap.rounds = s->parameters.announce_rounds; | |
916 | ap.step = s->parameters.announce_step; | |
917 | ||
918 | return ≈ | |
919 | } | |
920 | ||
f6844b99 DDAG |
921 | /* |
922 | * Return true if we're already in the middle of a migration | |
923 | * (i.e. any of the active or setup states) | |
924 | */ | |
3d63da16 | 925 | bool migration_is_setup_or_active(int state) |
f6844b99 DDAG |
926 | { |
927 | switch (state) { | |
928 | case MIGRATION_STATUS_ACTIVE: | |
9ec055ae | 929 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: |
a688d2c1 | 930 | case MIGRATION_STATUS_POSTCOPY_PAUSED: |
135b87b4 | 931 | case MIGRATION_STATUS_POSTCOPY_RECOVER: |
f6844b99 | 932 | case MIGRATION_STATUS_SETUP: |
31e06077 DDAG |
933 | case MIGRATION_STATUS_PRE_SWITCHOVER: |
934 | case MIGRATION_STATUS_DEVICE: | |
c7e0acd5 | 935 | case MIGRATION_STATUS_WAIT_UNPLUG: |
19dd408a | 936 | case MIGRATION_STATUS_COLO: |
f6844b99 DDAG |
937 | return true; |
938 | ||
939 | default: | |
940 | return false; | |
941 | ||
942 | } | |
943 | } | |
944 | ||
392d87e2 JQ |
945 | bool migration_is_running(int state) |
946 | { | |
947 | switch (state) { | |
948 | case MIGRATION_STATUS_ACTIVE: | |
949 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: | |
950 | case MIGRATION_STATUS_POSTCOPY_PAUSED: | |
951 | case MIGRATION_STATUS_POSTCOPY_RECOVER: | |
952 | case MIGRATION_STATUS_SETUP: | |
953 | case MIGRATION_STATUS_PRE_SWITCHOVER: | |
954 | case MIGRATION_STATUS_DEVICE: | |
955 | case MIGRATION_STATUS_WAIT_UNPLUG: | |
956 | case MIGRATION_STATUS_CANCELLING: | |
392d87e2 JQ |
957 | return true; |
958 | ||
959 | default: | |
960 | return false; | |
961 | ||
962 | } | |
963 | } | |
964 | ||
640dfb14 WY |
965 | static void populate_time_info(MigrationInfo *info, MigrationState *s) |
966 | { | |
967 | info->has_status = true; | |
968 | info->has_setup_time = true; | |
969 | info->setup_time = s->setup_time; | |
970 | if (s->state == MIGRATION_STATUS_COMPLETED) { | |
971 | info->has_total_time = true; | |
972 | info->total_time = s->total_time; | |
973 | info->has_downtime = true; | |
974 | info->downtime = s->downtime; | |
975 | } else { | |
976 | info->has_total_time = true; | |
977 | info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) - | |
978 | s->start_time; | |
979 | info->has_expected_downtime = true; | |
980 | info->expected_downtime = s->expected_downtime; | |
981 | } | |
982 | } | |
983 | ||
a22463a5 DDAG |
984 | static void populate_ram_info(MigrationInfo *info, MigrationState *s) |
985 | { | |
986 | info->has_ram = true; | |
987 | info->ram = g_malloc0(sizeof(*info->ram)); | |
9360447d | 988 | info->ram->transferred = ram_counters.transferred; |
a22463a5 | 989 | info->ram->total = ram_bytes_total(); |
9360447d | 990 | info->ram->duplicate = ram_counters.duplicate; |
bedf53c1 JQ |
991 | /* legacy value. It is not used anymore */ |
992 | info->ram->skipped = 0; | |
9360447d JQ |
993 | info->ram->normal = ram_counters.normal; |
994 | info->ram->normal_bytes = ram_counters.normal * | |
20afaed9 | 995 | qemu_target_page_size(); |
a22463a5 | 996 | info->ram->mbps = s->mbps; |
9360447d JQ |
997 | info->ram->dirty_sync_count = ram_counters.dirty_sync_count; |
998 | info->ram->postcopy_requests = ram_counters.postcopy_requests; | |
030ce1f8 | 999 | info->ram->page_size = qemu_target_page_size(); |
a61c45bd | 1000 | info->ram->multifd_bytes = ram_counters.multifd_bytes; |
aecbfe9c | 1001 | info->ram->pages_per_second = s->pages_per_second; |
a22463a5 | 1002 | |
114f5aee JQ |
1003 | if (migrate_use_xbzrle()) { |
1004 | info->has_xbzrle_cache = true; | |
1005 | info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache)); | |
1006 | info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size(); | |
9360447d JQ |
1007 | info->xbzrle_cache->bytes = xbzrle_counters.bytes; |
1008 | info->xbzrle_cache->pages = xbzrle_counters.pages; | |
1009 | info->xbzrle_cache->cache_miss = xbzrle_counters.cache_miss; | |
1010 | info->xbzrle_cache->cache_miss_rate = xbzrle_counters.cache_miss_rate; | |
e460a4b1 | 1011 | info->xbzrle_cache->encoding_rate = xbzrle_counters.encoding_rate; |
9360447d | 1012 | info->xbzrle_cache->overflow = xbzrle_counters.overflow; |
114f5aee JQ |
1013 | } |
1014 | ||
76e03000 XG |
1015 | if (migrate_use_compression()) { |
1016 | info->has_compression = true; | |
1017 | info->compression = g_malloc0(sizeof(*info->compression)); | |
1018 | info->compression->pages = compression_counters.pages; | |
1019 | info->compression->busy = compression_counters.busy; | |
1020 | info->compression->busy_rate = compression_counters.busy_rate; | |
1021 | info->compression->compressed_size = | |
1022 | compression_counters.compressed_size; | |
1023 | info->compression->compression_rate = | |
1024 | compression_counters.compression_rate; | |
1025 | } | |
1026 | ||
338182c8 JQ |
1027 | if (cpu_throttle_active()) { |
1028 | info->has_cpu_throttle_percentage = true; | |
1029 | info->cpu_throttle_percentage = cpu_throttle_get_percentage(); | |
1030 | } | |
1031 | ||
a22463a5 DDAG |
1032 | if (s->state != MIGRATION_STATUS_COMPLETED) { |
1033 | info->ram->remaining = ram_bytes_remaining(); | |
9360447d | 1034 | info->ram->dirty_pages_rate = ram_counters.dirty_pages_rate; |
a22463a5 DDAG |
1035 | } |
1036 | } | |
1037 | ||
930ac04c JQ |
1038 | static void populate_disk_info(MigrationInfo *info) |
1039 | { | |
1040 | if (blk_mig_active()) { | |
1041 | info->has_disk = true; | |
1042 | info->disk = g_malloc0(sizeof(*info->disk)); | |
1043 | info->disk->transferred = blk_mig_bytes_transferred(); | |
1044 | info->disk->remaining = blk_mig_bytes_remaining(); | |
1045 | info->disk->total = blk_mig_bytes_total(); | |
1046 | } | |
1047 | } | |
1048 | ||
65ace060 | 1049 | static void fill_source_migration_info(MigrationInfo *info) |
5bb7910a | 1050 | { |
17549e84 | 1051 | MigrationState *s = migrate_get_current(); |
372043f3 | 1052 | GSList *cur_blocker = migration_blockers; |
17549e84 | 1053 | |
3af8554b | 1054 | info->blocked_reasons = NULL; |
3af8554b | 1055 | |
372043f3 MA |
1056 | /* |
1057 | * There are two types of reasons a migration might be blocked; | |
1058 | * a) devices marked in VMState as non-migratable, and | |
1059 | * b) Explicit migration blockers | |
1060 | * We need to add both of them here. | |
1061 | */ | |
1062 | qemu_savevm_non_migratable_list(&info->blocked_reasons); | |
3af8554b | 1063 | |
372043f3 MA |
1064 | while (cur_blocker) { |
1065 | QAPI_LIST_PREPEND(info->blocked_reasons, | |
1066 | g_strdup(error_get_pretty(cur_blocker->data))); | |
1067 | cur_blocker = g_slist_next(cur_blocker); | |
3af8554b | 1068 | } |
372043f3 | 1069 | info->has_blocked_reasons = info->blocked_reasons != NULL; |
3af8554b | 1070 | |
17549e84 | 1071 | switch (s->state) { |
31194731 | 1072 | case MIGRATION_STATUS_NONE: |
17549e84 | 1073 | /* no migration has happened ever */ |
65ace060 AP |
1074 | /* do not overwrite destination migration status */ |
1075 | return; | |
31194731 | 1076 | case MIGRATION_STATUS_SETUP: |
29ae8a41 | 1077 | info->has_status = true; |
ed4fbd10 | 1078 | info->has_total_time = false; |
29ae8a41 | 1079 | break; |
31194731 HZ |
1080 | case MIGRATION_STATUS_ACTIVE: |
1081 | case MIGRATION_STATUS_CANCELLING: | |
9ec055ae | 1082 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: |
31e06077 DDAG |
1083 | case MIGRATION_STATUS_PRE_SWITCHOVER: |
1084 | case MIGRATION_STATUS_DEVICE: | |
a688d2c1 | 1085 | case MIGRATION_STATUS_POSTCOPY_PAUSED: |
135b87b4 | 1086 | case MIGRATION_STATUS_POSTCOPY_RECOVER: |
640dfb14 WY |
1087 | /* TODO add some postcopy stats */ |
1088 | populate_time_info(info, s); | |
a22463a5 | 1089 | populate_ram_info(info, s); |
930ac04c | 1090 | populate_disk_info(info); |
3710586c | 1091 | populate_vfio_info(info); |
17549e84 | 1092 | break; |
0b827d5e HZ |
1093 | case MIGRATION_STATUS_COLO: |
1094 | info->has_status = true; | |
1095 | /* TODO: display COLO specific information (checkpoint info etc.) */ | |
1096 | break; | |
31194731 | 1097 | case MIGRATION_STATUS_COMPLETED: |
640dfb14 | 1098 | populate_time_info(info, s); |
a22463a5 | 1099 | populate_ram_info(info, s); |
3710586c | 1100 | populate_vfio_info(info); |
17549e84 | 1101 | break; |
31194731 | 1102 | case MIGRATION_STATUS_FAILED: |
791e7c82 | 1103 | info->has_status = true; |
d59ce6f3 DB |
1104 | if (s->error) { |
1105 | info->has_error_desc = true; | |
1106 | info->error_desc = g_strdup(error_get_pretty(s->error)); | |
1107 | } | |
17549e84 | 1108 | break; |
31194731 | 1109 | case MIGRATION_STATUS_CANCELLED: |
791e7c82 | 1110 | info->has_status = true; |
17549e84 | 1111 | break; |
c7e0acd5 JF |
1112 | case MIGRATION_STATUS_WAIT_UNPLUG: |
1113 | info->has_status = true; | |
1114 | break; | |
5bb7910a | 1115 | } |
cde63fbe | 1116 | info->status = s->state; |
5bb7910a AL |
1117 | } |
1118 | ||
6e8c25b4 AG |
1119 | typedef enum WriteTrackingSupport { |
1120 | WT_SUPPORT_UNKNOWN = 0, | |
1121 | WT_SUPPORT_ABSENT, | |
1122 | WT_SUPPORT_AVAILABLE, | |
1123 | WT_SUPPORT_COMPATIBLE | |
1124 | } WriteTrackingSupport; | |
1125 | ||
1126 | static | |
1127 | WriteTrackingSupport migrate_query_write_tracking(void) | |
1128 | { | |
1129 | /* Check if kernel supports required UFFD features */ | |
1130 | if (!ram_write_tracking_available()) { | |
1131 | return WT_SUPPORT_ABSENT; | |
1132 | } | |
1133 | /* | |
1134 | * Check if current memory configuration is | |
1135 | * compatible with required UFFD features. | |
1136 | */ | |
1137 | if (!ram_write_tracking_compatible()) { | |
1138 | return WT_SUPPORT_AVAILABLE; | |
1139 | } | |
1140 | ||
1141 | return WT_SUPPORT_COMPATIBLE; | |
1142 | } | |
1143 | ||
4a84214e PX |
1144 | /** |
1145 | * @migration_caps_check - check capability validity | |
1146 | * | |
1147 | * @cap_list: old capability list, array of bool | |
1148 | * @params: new capabilities to be applied soon | |
1149 | * @errp: set *errp if the check failed, with reason | |
1150 | * | |
1151 | * Returns true if check passed, otherwise false. | |
1152 | */ | |
1153 | static bool migrate_caps_check(bool *cap_list, | |
1154 | MigrationCapabilityStatusList *params, | |
1155 | Error **errp) | |
00458433 | 1156 | { |
00458433 | 1157 | MigrationCapabilityStatusList *cap; |
4a84214e | 1158 | bool old_postcopy_cap; |
d7651f15 | 1159 | MigrationIncomingState *mis = migration_incoming_get_current(); |
00458433 | 1160 | |
4a84214e | 1161 | old_postcopy_cap = cap_list[MIGRATION_CAPABILITY_POSTCOPY_RAM]; |
00458433 OW |
1162 | |
1163 | for (cap = params; cap; cap = cap->next) { | |
4a84214e PX |
1164 | cap_list[cap->value->capability] = cap->value->state; |
1165 | } | |
1166 | ||
ed1701c6 | 1167 | #ifndef CONFIG_LIVE_BLOCK_MIGRATION |
4a84214e PX |
1168 | if (cap_list[MIGRATION_CAPABILITY_BLOCK]) { |
1169 | error_setg(errp, "QEMU compiled without old-style (blk/-b, inc/-i) " | |
1170 | "block migration"); | |
1171 | error_append_hint(errp, "Use drive_mirror+NBD instead.\n"); | |
1172 | return false; | |
00458433 | 1173 | } |
4a84214e | 1174 | #endif |
53dd370c | 1175 | |
7e934f5b ZC |
1176 | #ifndef CONFIG_REPLICATION |
1177 | if (cap_list[MIGRATION_CAPABILITY_X_COLO]) { | |
1178 | error_setg(errp, "QEMU compiled without replication module" | |
1179 | " can't enable COLO"); | |
1180 | error_append_hint(errp, "Please enable replication before COLO.\n"); | |
1181 | return false; | |
1182 | } | |
1183 | #endif | |
1184 | ||
4a84214e | 1185 | if (cap_list[MIGRATION_CAPABILITY_POSTCOPY_RAM]) { |
096631bd DDAG |
1186 | /* This check is reasonably expensive, so only when it's being |
1187 | * set the first time, also it's only the destination that needs | |
1188 | * special support. | |
1189 | */ | |
1190 | if (!old_postcopy_cap && runstate_check(RUN_STATE_INMIGRATE) && | |
d7651f15 | 1191 | !postcopy_ram_supported_by_host(mis)) { |
096631bd DDAG |
1192 | /* postcopy_ram_supported_by_host will have emitted a more |
1193 | * detailed message | |
1194 | */ | |
4a84214e PX |
1195 | error_setg(errp, "Postcopy is not supported"); |
1196 | return false; | |
096631bd | 1197 | } |
18269069 YK |
1198 | |
1199 | if (cap_list[MIGRATION_CAPABILITY_X_IGNORE_SHARED]) { | |
1200 | error_setg(errp, "Postcopy is not compatible with ignore-shared"); | |
1201 | return false; | |
1202 | } | |
53dd370c | 1203 | } |
4a84214e | 1204 | |
6e8c25b4 AG |
1205 | if (cap_list[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]) { |
1206 | WriteTrackingSupport wt_support; | |
1207 | int idx; | |
1208 | /* | |
1209 | * Check if 'background-snapshot' capability is supported by | |
1210 | * host kernel and compatible with guest memory configuration. | |
1211 | */ | |
1212 | wt_support = migrate_query_write_tracking(); | |
1213 | if (wt_support < WT_SUPPORT_AVAILABLE) { | |
1214 | error_setg(errp, "Background-snapshot is not supported by host kernel"); | |
1215 | return false; | |
1216 | } | |
1217 | if (wt_support < WT_SUPPORT_COMPATIBLE) { | |
1218 | error_setg(errp, "Background-snapshot is not compatible " | |
1219 | "with guest memory configuration"); | |
1220 | return false; | |
1221 | } | |
1222 | ||
1223 | /* | |
1224 | * Check if there are any migration capabilities | |
1225 | * incompatible with 'background-snapshot'. | |
1226 | */ | |
1227 | for (idx = 0; idx < check_caps_background_snapshot.size; idx++) { | |
1228 | int incomp_cap = check_caps_background_snapshot.caps[idx]; | |
1229 | if (cap_list[incomp_cap]) { | |
1230 | error_setg(errp, | |
1231 | "Background-snapshot is not compatible with %s", | |
1232 | MigrationCapability_str(incomp_cap)); | |
1233 | return false; | |
1234 | } | |
1235 | } | |
1236 | } | |
1237 | ||
4a84214e PX |
1238 | return true; |
1239 | } | |
1240 | ||
65ace060 AP |
1241 | static void fill_destination_migration_info(MigrationInfo *info) |
1242 | { | |
1243 | MigrationIncomingState *mis = migration_incoming_get_current(); | |
1244 | ||
9aca82ba JQ |
1245 | if (mis->socket_address_list) { |
1246 | info->has_socket_address = true; | |
1247 | info->socket_address = | |
1248 | QAPI_CLONE(SocketAddressList, mis->socket_address_list); | |
1249 | } | |
1250 | ||
65ace060 AP |
1251 | switch (mis->state) { |
1252 | case MIGRATION_STATUS_NONE: | |
1253 | return; | |
65ace060 AP |
1254 | case MIGRATION_STATUS_SETUP: |
1255 | case MIGRATION_STATUS_CANCELLING: | |
1256 | case MIGRATION_STATUS_CANCELLED: | |
1257 | case MIGRATION_STATUS_ACTIVE: | |
1258 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: | |
3c9928d9 PX |
1259 | case MIGRATION_STATUS_POSTCOPY_PAUSED: |
1260 | case MIGRATION_STATUS_POSTCOPY_RECOVER: | |
65ace060 AP |
1261 | case MIGRATION_STATUS_FAILED: |
1262 | case MIGRATION_STATUS_COLO: | |
1263 | info->has_status = true; | |
1264 | break; | |
1265 | case MIGRATION_STATUS_COMPLETED: | |
1266 | info->has_status = true; | |
1267 | fill_destination_postcopy_migration_info(info); | |
1268 | break; | |
1269 | } | |
1270 | info->status = mis->state; | |
1271 | } | |
1272 | ||
1273 | MigrationInfo *qmp_query_migrate(Error **errp) | |
1274 | { | |
1275 | MigrationInfo *info = g_malloc0(sizeof(*info)); | |
1276 | ||
1277 | fill_destination_migration_info(info); | |
1278 | fill_source_migration_info(info); | |
1279 | ||
1280 | return info; | |
1281 | } | |
1282 | ||
4a84214e PX |
1283 | void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params, |
1284 | Error **errp) | |
1285 | { | |
1286 | MigrationState *s = migrate_get_current(); | |
1287 | MigrationCapabilityStatusList *cap; | |
dd0ee30c | 1288 | bool cap_list[MIGRATION_CAPABILITY__MAX]; |
4a84214e | 1289 | |
392d87e2 | 1290 | if (migration_is_running(s->state)) { |
4a84214e PX |
1291 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
1292 | return; | |
1293 | } | |
1294 | ||
dd0ee30c PX |
1295 | memcpy(cap_list, s->enabled_capabilities, sizeof(cap_list)); |
1296 | if (!migrate_caps_check(cap_list, params, errp)) { | |
4a84214e PX |
1297 | return; |
1298 | } | |
1299 | ||
1300 | for (cap = params; cap; cap = cap->next) { | |
1301 | s->enabled_capabilities[cap->value->capability] = cap->value->state; | |
1302 | } | |
00458433 OW |
1303 | } |
1304 | ||
16d063bc PX |
1305 | /* |
1306 | * Check whether the parameters are valid. Error will be put into errp | |
1307 | * (if provided). Return true if valid, otherwise false. | |
1308 | */ | |
1309 | static bool migrate_params_check(MigrationParameters *params, Error **errp) | |
85de8323 | 1310 | { |
7f375e04 | 1311 | if (params->has_compress_level && |
741d4086 | 1312 | (params->compress_level > 9)) { |
c6bd8c70 | 1313 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "compress_level", |
54270c45 | 1314 | "a value between 0 and 9"); |
16d063bc | 1315 | return false; |
85de8323 | 1316 | } |
16d063bc | 1317 | |
741d4086 | 1318 | if (params->has_compress_threads && (params->compress_threads < 1)) { |
c6bd8c70 MA |
1319 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
1320 | "compress_threads", | |
54270c45 | 1321 | "a value between 1 and 255"); |
16d063bc | 1322 | return false; |
85de8323 | 1323 | } |
16d063bc | 1324 | |
741d4086 | 1325 | if (params->has_decompress_threads && (params->decompress_threads < 1)) { |
c6bd8c70 MA |
1326 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
1327 | "decompress_threads", | |
54270c45 | 1328 | "a value between 1 and 255"); |
16d063bc | 1329 | return false; |
85de8323 | 1330 | } |
16d063bc | 1331 | |
dc14a470 KZ |
1332 | if (params->has_throttle_trigger_threshold && |
1333 | (params->throttle_trigger_threshold < 1 || | |
1334 | params->throttle_trigger_threshold > 100)) { | |
1335 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1336 | "throttle_trigger_threshold", | |
1337 | "an integer in the range of 1 to 100"); | |
1338 | return false; | |
1339 | } | |
1340 | ||
7f375e04 EB |
1341 | if (params->has_cpu_throttle_initial && |
1342 | (params->cpu_throttle_initial < 1 || | |
1343 | params->cpu_throttle_initial > 99)) { | |
1626fee3 | 1344 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
d85a31d1 | 1345 | "cpu_throttle_initial", |
1626fee3 | 1346 | "an integer in the range of 1 to 99"); |
16d063bc | 1347 | return false; |
1626fee3 | 1348 | } |
16d063bc | 1349 | |
7f375e04 EB |
1350 | if (params->has_cpu_throttle_increment && |
1351 | (params->cpu_throttle_increment < 1 || | |
1352 | params->cpu_throttle_increment > 99)) { | |
1626fee3 | 1353 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
d85a31d1 | 1354 | "cpu_throttle_increment", |
1626fee3 | 1355 | "an integer in the range of 1 to 99"); |
16d063bc | 1356 | return false; |
1626fee3 | 1357 | } |
16d063bc | 1358 | |
741d4086 | 1359 | if (params->has_max_bandwidth && (params->max_bandwidth > SIZE_MAX)) { |
2ee30cf0 MZ |
1360 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
1361 | "max_bandwidth", | |
1362 | "an integer in the range of 0 to "stringify(SIZE_MAX) | |
1363 | " bytes/second"); | |
16d063bc | 1364 | return false; |
2ff30257 | 1365 | } |
16d063bc | 1366 | |
2ff30257 | 1367 | if (params->has_downtime_limit && |
741d4086 | 1368 | (params->downtime_limit > MAX_MIGRATE_DOWNTIME)) { |
2ee30cf0 MZ |
1369 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
1370 | "downtime_limit", | |
1371 | "an integer in the range of 0 to " | |
7ac5529a | 1372 | stringify(MAX_MIGRATE_DOWNTIME)" ms"); |
16d063bc | 1373 | return false; |
2ff30257 | 1374 | } |
16d063bc | 1375 | |
741d4086 JQ |
1376 | /* x_checkpoint_delay is now always positive */ |
1377 | ||
cbfd6c95 | 1378 | if (params->has_multifd_channels && (params->multifd_channels < 1)) { |
4075fb1c JQ |
1379 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, |
1380 | "multifd_channels", | |
54270c45 | 1381 | "a value between 1 and 255"); |
4075fb1c JQ |
1382 | return false; |
1383 | } | |
16d063bc | 1384 | |
9004db48 JQ |
1385 | if (params->has_multifd_zlib_level && |
1386 | (params->multifd_zlib_level > 9)) { | |
1387 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zlib_level", | |
54270c45 | 1388 | "a value between 0 and 9"); |
9004db48 JQ |
1389 | return false; |
1390 | } | |
1391 | ||
6a9ad154 JQ |
1392 | if (params->has_multifd_zstd_level && |
1393 | (params->multifd_zstd_level > 20)) { | |
1394 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "multifd_zstd_level", | |
54270c45 | 1395 | "a value between 0 and 20"); |
6a9ad154 JQ |
1396 | return false; |
1397 | } | |
1398 | ||
73af8dd8 JQ |
1399 | if (params->has_xbzrle_cache_size && |
1400 | (params->xbzrle_cache_size < qemu_target_page_size() || | |
1401 | !is_power_of_2(params->xbzrle_cache_size))) { | |
1402 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1403 | "xbzrle_cache_size", | |
54270c45 | 1404 | "a power of two no less than the target page size"); |
73af8dd8 JQ |
1405 | return false; |
1406 | } | |
1407 | ||
4cbc9c7f LQ |
1408 | if (params->has_max_cpu_throttle && |
1409 | (params->max_cpu_throttle < params->cpu_throttle_initial || | |
1410 | params->max_cpu_throttle > 99)) { | |
1411 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1412 | "max_cpu_throttle", | |
1413 | "an integer in the range of cpu_throttle_initial to 99"); | |
1414 | return false; | |
1415 | } | |
1416 | ||
ee3d96ba DDAG |
1417 | if (params->has_announce_initial && |
1418 | params->announce_initial > 100000) { | |
1419 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1420 | "announce_initial", | |
54270c45 | 1421 | "a value between 0 and 100000"); |
ee3d96ba DDAG |
1422 | return false; |
1423 | } | |
1424 | if (params->has_announce_max && | |
1425 | params->announce_max > 100000) { | |
1426 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1427 | "announce_max", | |
54270c45 | 1428 | "a value between 0 and 100000"); |
ee3d96ba DDAG |
1429 | return false; |
1430 | } | |
1431 | if (params->has_announce_rounds && | |
1432 | params->announce_rounds > 1000) { | |
1433 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1434 | "announce_rounds", | |
54270c45 | 1435 | "a value between 0 and 1000"); |
ee3d96ba DDAG |
1436 | return false; |
1437 | } | |
1438 | if (params->has_announce_step && | |
1439 | (params->announce_step < 1 || | |
1440 | params->announce_step > 10000)) { | |
1441 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, | |
1442 | "announce_step", | |
54270c45 | 1443 | "a value between 0 and 10000"); |
ee3d96ba DDAG |
1444 | return false; |
1445 | } | |
31e4c354 HR |
1446 | |
1447 | if (params->has_block_bitmap_mapping && | |
1448 | !check_dirty_bitmap_mig_alias_map(params->block_bitmap_mapping, errp)) { | |
1449 | error_prepend(errp, "Invalid mapping given for block-bitmap-mapping: "); | |
1450 | return false; | |
1451 | } | |
1452 | ||
16d063bc PX |
1453 | return true; |
1454 | } | |
1455 | ||
1bda8b3c MA |
1456 | static void migrate_params_test_apply(MigrateSetParameters *params, |
1457 | MigrationParameters *dest) | |
1458 | { | |
1459 | *dest = migrate_get_current()->parameters; | |
1460 | ||
1461 | /* TODO use QAPI_CLONE() instead of duplicating it inline */ | |
1462 | ||
1463 | if (params->has_compress_level) { | |
1464 | dest->compress_level = params->compress_level; | |
1465 | } | |
1466 | ||
1467 | if (params->has_compress_threads) { | |
1468 | dest->compress_threads = params->compress_threads; | |
1469 | } | |
1470 | ||
1d58872a XG |
1471 | if (params->has_compress_wait_thread) { |
1472 | dest->compress_wait_thread = params->compress_wait_thread; | |
1473 | } | |
1474 | ||
1bda8b3c MA |
1475 | if (params->has_decompress_threads) { |
1476 | dest->decompress_threads = params->decompress_threads; | |
1477 | } | |
1478 | ||
dc14a470 KZ |
1479 | if (params->has_throttle_trigger_threshold) { |
1480 | dest->throttle_trigger_threshold = params->throttle_trigger_threshold; | |
1481 | } | |
1482 | ||
1bda8b3c MA |
1483 | if (params->has_cpu_throttle_initial) { |
1484 | dest->cpu_throttle_initial = params->cpu_throttle_initial; | |
1485 | } | |
1486 | ||
1487 | if (params->has_cpu_throttle_increment) { | |
1488 | dest->cpu_throttle_increment = params->cpu_throttle_increment; | |
1489 | } | |
1490 | ||
cbbf8182 KZ |
1491 | if (params->has_cpu_throttle_tailslow) { |
1492 | dest->cpu_throttle_tailslow = params->cpu_throttle_tailslow; | |
1493 | } | |
1494 | ||
1bda8b3c | 1495 | if (params->has_tls_creds) { |
01fa5598 | 1496 | assert(params->tls_creds->type == QTYPE_QSTRING); |
9728ebfb | 1497 | dest->tls_creds = params->tls_creds->u.s; |
1bda8b3c MA |
1498 | } |
1499 | ||
1500 | if (params->has_tls_hostname) { | |
01fa5598 | 1501 | assert(params->tls_hostname->type == QTYPE_QSTRING); |
9728ebfb | 1502 | dest->tls_hostname = params->tls_hostname->u.s; |
1bda8b3c MA |
1503 | } |
1504 | ||
1505 | if (params->has_max_bandwidth) { | |
1506 | dest->max_bandwidth = params->max_bandwidth; | |
1507 | } | |
1508 | ||
1509 | if (params->has_downtime_limit) { | |
1510 | dest->downtime_limit = params->downtime_limit; | |
1511 | } | |
1512 | ||
1513 | if (params->has_x_checkpoint_delay) { | |
1514 | dest->x_checkpoint_delay = params->x_checkpoint_delay; | |
1515 | } | |
1516 | ||
1517 | if (params->has_block_incremental) { | |
1518 | dest->block_incremental = params->block_incremental; | |
1519 | } | |
cbfd6c95 JQ |
1520 | if (params->has_multifd_channels) { |
1521 | dest->multifd_channels = params->multifd_channels; | |
5e7577a1 | 1522 | } |
96eef042 JQ |
1523 | if (params->has_multifd_compression) { |
1524 | dest->multifd_compression = params->multifd_compression; | |
1525 | } | |
73af8dd8 JQ |
1526 | if (params->has_xbzrle_cache_size) { |
1527 | dest->xbzrle_cache_size = params->xbzrle_cache_size; | |
1528 | } | |
7e555c6c DDAG |
1529 | if (params->has_max_postcopy_bandwidth) { |
1530 | dest->max_postcopy_bandwidth = params->max_postcopy_bandwidth; | |
1531 | } | |
4cbc9c7f LQ |
1532 | if (params->has_max_cpu_throttle) { |
1533 | dest->max_cpu_throttle = params->max_cpu_throttle; | |
1534 | } | |
ee3d96ba DDAG |
1535 | if (params->has_announce_initial) { |
1536 | dest->announce_initial = params->announce_initial; | |
1537 | } | |
1538 | if (params->has_announce_max) { | |
1539 | dest->announce_max = params->announce_max; | |
1540 | } | |
1541 | if (params->has_announce_rounds) { | |
1542 | dest->announce_rounds = params->announce_rounds; | |
1543 | } | |
1544 | if (params->has_announce_step) { | |
1545 | dest->announce_step = params->announce_step; | |
1546 | } | |
31e4c354 HR |
1547 | |
1548 | if (params->has_block_bitmap_mapping) { | |
1549 | dest->has_block_bitmap_mapping = true; | |
1550 | dest->block_bitmap_mapping = params->block_bitmap_mapping; | |
1551 | } | |
1bda8b3c MA |
1552 | } |
1553 | ||
73af8dd8 | 1554 | static void migrate_params_apply(MigrateSetParameters *params, Error **errp) |
16d063bc PX |
1555 | { |
1556 | MigrationState *s = migrate_get_current(); | |
1557 | ||
e87fae4c MA |
1558 | /* TODO use QAPI_CLONE() instead of duplicating it inline */ |
1559 | ||
7f375e04 EB |
1560 | if (params->has_compress_level) { |
1561 | s->parameters.compress_level = params->compress_level; | |
85de8323 | 1562 | } |
476c72aa | 1563 | |
7f375e04 EB |
1564 | if (params->has_compress_threads) { |
1565 | s->parameters.compress_threads = params->compress_threads; | |
85de8323 | 1566 | } |
476c72aa | 1567 | |
1d58872a XG |
1568 | if (params->has_compress_wait_thread) { |
1569 | s->parameters.compress_wait_thread = params->compress_wait_thread; | |
1570 | } | |
1571 | ||
7f375e04 EB |
1572 | if (params->has_decompress_threads) { |
1573 | s->parameters.decompress_threads = params->decompress_threads; | |
85de8323 | 1574 | } |
476c72aa | 1575 | |
dc14a470 KZ |
1576 | if (params->has_throttle_trigger_threshold) { |
1577 | s->parameters.throttle_trigger_threshold = params->throttle_trigger_threshold; | |
1578 | } | |
1579 | ||
7f375e04 EB |
1580 | if (params->has_cpu_throttle_initial) { |
1581 | s->parameters.cpu_throttle_initial = params->cpu_throttle_initial; | |
1626fee3 | 1582 | } |
476c72aa | 1583 | |
7f375e04 EB |
1584 | if (params->has_cpu_throttle_increment) { |
1585 | s->parameters.cpu_throttle_increment = params->cpu_throttle_increment; | |
1626fee3 | 1586 | } |
476c72aa | 1587 | |
cbbf8182 KZ |
1588 | if (params->has_cpu_throttle_tailslow) { |
1589 | s->parameters.cpu_throttle_tailslow = params->cpu_throttle_tailslow; | |
1590 | } | |
1591 | ||
7f375e04 | 1592 | if (params->has_tls_creds) { |
69ef1f36 | 1593 | g_free(s->parameters.tls_creds); |
01fa5598 MA |
1594 | assert(params->tls_creds->type == QTYPE_QSTRING); |
1595 | s->parameters.tls_creds = g_strdup(params->tls_creds->u.s); | |
69ef1f36 | 1596 | } |
476c72aa | 1597 | |
7f375e04 | 1598 | if (params->has_tls_hostname) { |
69ef1f36 | 1599 | g_free(s->parameters.tls_hostname); |
01fa5598 MA |
1600 | assert(params->tls_hostname->type == QTYPE_QSTRING); |
1601 | s->parameters.tls_hostname = g_strdup(params->tls_hostname->u.s); | |
69ef1f36 | 1602 | } |
476c72aa | 1603 | |
d2f1d29b DB |
1604 | if (params->has_tls_authz) { |
1605 | g_free(s->parameters.tls_authz); | |
1606 | assert(params->tls_authz->type == QTYPE_QSTRING); | |
1607 | s->parameters.tls_authz = g_strdup(params->tls_authz->u.s); | |
1608 | } | |
1609 | ||
2ff30257 AA |
1610 | if (params->has_max_bandwidth) { |
1611 | s->parameters.max_bandwidth = params->max_bandwidth; | |
c38c1c14 | 1612 | if (s->to_dst_file && !migration_in_postcopy()) { |
2ff30257 AA |
1613 | qemu_file_set_rate_limit(s->to_dst_file, |
1614 | s->parameters.max_bandwidth / XFER_LIMIT_RATIO); | |
1615 | } | |
1616 | } | |
476c72aa | 1617 | |
2ff30257 AA |
1618 | if (params->has_downtime_limit) { |
1619 | s->parameters.downtime_limit = params->downtime_limit; | |
1620 | } | |
68b53591 HZ |
1621 | |
1622 | if (params->has_x_checkpoint_delay) { | |
1623 | s->parameters.x_checkpoint_delay = params->x_checkpoint_delay; | |
479125d5 HZ |
1624 | if (migration_in_colo_state()) { |
1625 | colo_checkpoint_notify(s); | |
1626 | } | |
68b53591 | 1627 | } |
476c72aa | 1628 | |
2833c59b JQ |
1629 | if (params->has_block_incremental) { |
1630 | s->parameters.block_incremental = params->block_incremental; | |
1631 | } | |
cbfd6c95 JQ |
1632 | if (params->has_multifd_channels) { |
1633 | s->parameters.multifd_channels = params->multifd_channels; | |
4075fb1c | 1634 | } |
96eef042 JQ |
1635 | if (params->has_multifd_compression) { |
1636 | s->parameters.multifd_compression = params->multifd_compression; | |
1637 | } | |
73af8dd8 JQ |
1638 | if (params->has_xbzrle_cache_size) { |
1639 | s->parameters.xbzrle_cache_size = params->xbzrle_cache_size; | |
1640 | xbzrle_cache_resize(params->xbzrle_cache_size, errp); | |
1641 | } | |
7e555c6c DDAG |
1642 | if (params->has_max_postcopy_bandwidth) { |
1643 | s->parameters.max_postcopy_bandwidth = params->max_postcopy_bandwidth; | |
c38c1c14 DDAG |
1644 | if (s->to_dst_file && migration_in_postcopy()) { |
1645 | qemu_file_set_rate_limit(s->to_dst_file, | |
1646 | s->parameters.max_postcopy_bandwidth / XFER_LIMIT_RATIO); | |
1647 | } | |
7e555c6c | 1648 | } |
4cbc9c7f LQ |
1649 | if (params->has_max_cpu_throttle) { |
1650 | s->parameters.max_cpu_throttle = params->max_cpu_throttle; | |
1651 | } | |
ee3d96ba DDAG |
1652 | if (params->has_announce_initial) { |
1653 | s->parameters.announce_initial = params->announce_initial; | |
1654 | } | |
1655 | if (params->has_announce_max) { | |
1656 | s->parameters.announce_max = params->announce_max; | |
1657 | } | |
1658 | if (params->has_announce_rounds) { | |
1659 | s->parameters.announce_rounds = params->announce_rounds; | |
1660 | } | |
1661 | if (params->has_announce_step) { | |
1662 | s->parameters.announce_step = params->announce_step; | |
1663 | } | |
31e4c354 HR |
1664 | |
1665 | if (params->has_block_bitmap_mapping) { | |
1666 | qapi_free_BitmapMigrationNodeAliasList( | |
1667 | s->parameters.block_bitmap_mapping); | |
1668 | ||
1669 | s->parameters.has_block_bitmap_mapping = true; | |
1670 | s->parameters.block_bitmap_mapping = | |
1671 | QAPI_CLONE(BitmapMigrationNodeAliasList, | |
1672 | params->block_bitmap_mapping); | |
1673 | } | |
85de8323 LL |
1674 | } |
1675 | ||
1bda8b3c | 1676 | void qmp_migrate_set_parameters(MigrateSetParameters *params, Error **errp) |
476c72aa | 1677 | { |
1bda8b3c MA |
1678 | MigrationParameters tmp; |
1679 | ||
01fa5598 MA |
1680 | /* TODO Rewrite "" to null instead */ |
1681 | if (params->has_tls_creds | |
1682 | && params->tls_creds->type == QTYPE_QNULL) { | |
cb3e7f08 | 1683 | qobject_unref(params->tls_creds->u.n); |
01fa5598 MA |
1684 | params->tls_creds->type = QTYPE_QSTRING; |
1685 | params->tls_creds->u.s = strdup(""); | |
1686 | } | |
1687 | /* TODO Rewrite "" to null instead */ | |
1688 | if (params->has_tls_hostname | |
1689 | && params->tls_hostname->type == QTYPE_QNULL) { | |
cb3e7f08 | 1690 | qobject_unref(params->tls_hostname->u.n); |
01fa5598 MA |
1691 | params->tls_hostname->type = QTYPE_QSTRING; |
1692 | params->tls_hostname->u.s = strdup(""); | |
1693 | } | |
1694 | ||
1bda8b3c MA |
1695 | migrate_params_test_apply(params, &tmp); |
1696 | ||
1697 | if (!migrate_params_check(&tmp, errp)) { | |
476c72aa PX |
1698 | /* Invalid parameter */ |
1699 | return; | |
1700 | } | |
1701 | ||
73af8dd8 | 1702 | migrate_params_apply(params, errp); |
476c72aa PX |
1703 | } |
1704 | ||
2594f56d | 1705 | |
4886a1bc DDAG |
1706 | void qmp_migrate_start_postcopy(Error **errp) |
1707 | { | |
1708 | MigrationState *s = migrate_get_current(); | |
1709 | ||
16b0fd32 | 1710 | if (!migrate_postcopy()) { |
a54d340b | 1711 | error_setg(errp, "Enable postcopy with migrate_set_capability before" |
4886a1bc DDAG |
1712 | " the start of migration"); |
1713 | return; | |
1714 | } | |
1715 | ||
1716 | if (s->state == MIGRATION_STATUS_NONE) { | |
1717 | error_setg(errp, "Postcopy must be started after migration has been" | |
1718 | " started"); | |
1719 | return; | |
1720 | } | |
1721 | /* | |
1722 | * we don't error if migration has finished since that would be racy | |
1723 | * with issuing this command. | |
1724 | */ | |
d73415a3 | 1725 | qatomic_set(&s->start_postcopy, true); |
4886a1bc DDAG |
1726 | } |
1727 | ||
065e2813 AL |
1728 | /* shared migration helpers */ |
1729 | ||
48781e5b | 1730 | void migrate_set_state(int *state, int old_state, int new_state) |
51cf4c1a | 1731 | { |
a31fedee | 1732 | assert(new_state < MIGRATION_STATUS__MAX); |
d73415a3 | 1733 | if (qatomic_cmpxchg(state, old_state, new_state) == old_state) { |
a31fedee | 1734 | trace_migrate_set_state(MigrationStatus_str(new_state)); |
b05dc723 | 1735 | migrate_generate_event(new_state); |
51cf4c1a Z |
1736 | } |
1737 | } | |
1738 | ||
eaedde52 EB |
1739 | static MigrationCapabilityStatus *migrate_cap_add(MigrationCapability index, |
1740 | bool state) | |
2833c59b | 1741 | { |
eaedde52 | 1742 | MigrationCapabilityStatus *cap; |
2833c59b | 1743 | |
eaedde52 EB |
1744 | cap = g_new0(MigrationCapabilityStatus, 1); |
1745 | cap->capability = index; | |
1746 | cap->state = state; | |
4e4a3d3a PX |
1747 | |
1748 | return cap; | |
1749 | } | |
1750 | ||
1751 | void migrate_set_block_enabled(bool value, Error **errp) | |
1752 | { | |
eaedde52 | 1753 | MigrationCapabilityStatusList *cap = NULL; |
4e4a3d3a | 1754 | |
eaedde52 | 1755 | QAPI_LIST_PREPEND(cap, migrate_cap_add(MIGRATION_CAPABILITY_BLOCK, value)); |
2833c59b JQ |
1756 | qmp_migrate_set_capabilities(cap, errp); |
1757 | qapi_free_MigrationCapabilityStatusList(cap); | |
1758 | } | |
1759 | ||
1760 | static void migrate_set_block_incremental(MigrationState *s, bool value) | |
1761 | { | |
1762 | s->parameters.block_incremental = value; | |
1763 | } | |
1764 | ||
1765 | static void block_cleanup_parameters(MigrationState *s) | |
1766 | { | |
1767 | if (s->must_remove_block_options) { | |
1768 | /* setting to false can never fail */ | |
1769 | migrate_set_block_enabled(false, &error_abort); | |
1770 | migrate_set_block_incremental(s, false); | |
1771 | s->must_remove_block_options = false; | |
1772 | } | |
1773 | } | |
1774 | ||
fd392cfa | 1775 | static void migrate_fd_cleanup(MigrationState *s) |
065e2813 | 1776 | { |
bb1fadc4 PB |
1777 | qemu_bh_delete(s->cleanup_bh); |
1778 | s->cleanup_bh = NULL; | |
1779 | ||
0ceccd85 PX |
1780 | qemu_savevm_state_cleanup(); |
1781 | ||
89a02a9f | 1782 | if (s->to_dst_file) { |
62df066f | 1783 | QEMUFile *tmp; |
f986c3d2 | 1784 | |
9013dca5 | 1785 | trace_migrate_fd_cleanup(); |
404a7c05 | 1786 | qemu_mutex_unlock_iothread(); |
1d34e4bf DDAG |
1787 | if (s->migration_thread_running) { |
1788 | qemu_thread_join(&s->thread); | |
1789 | s->migration_thread_running = false; | |
1790 | } | |
404a7c05 PB |
1791 | qemu_mutex_lock_iothread(); |
1792 | ||
1398b2e3 | 1793 | multifd_save_cleanup(); |
62df066f PX |
1794 | qemu_mutex_lock(&s->qemu_file_lock); |
1795 | tmp = s->to_dst_file; | |
89a02a9f | 1796 | s->to_dst_file = NULL; |
62df066f PX |
1797 | qemu_mutex_unlock(&s->qemu_file_lock); |
1798 | /* | |
1799 | * Close the file handle without the lock to make sure the | |
1800 | * critical section won't block for long. | |
1801 | */ | |
39675fff | 1802 | migration_ioc_unregister_yank_from_file(tmp); |
62df066f | 1803 | qemu_fclose(tmp); |
065e2813 AL |
1804 | } |
1805 | ||
8f8d528e | 1806 | assert(!migration_is_active(s)); |
7a2c1721 | 1807 | |
94f5a437 | 1808 | if (s->state == MIGRATION_STATUS_CANCELLING) { |
48781e5b | 1809 | migrate_set_state(&s->state, MIGRATION_STATUS_CANCELLING, |
94f5a437 | 1810 | MIGRATION_STATUS_CANCELLED); |
7a2c1721 | 1811 | } |
a3fa1d78 | 1812 | |
87db1a7d JQ |
1813 | if (s->error) { |
1814 | /* It is used on info migrate. We can't free it */ | |
1815 | error_report_err(error_copy(s->error)); | |
1816 | } | |
a3fa1d78 | 1817 | notifier_list_notify(&migration_state_notifiers, s); |
2833c59b | 1818 | block_cleanup_parameters(s); |
b5eea99e | 1819 | yank_unregister_instance(MIGRATION_YANK_INSTANCE); |
065e2813 AL |
1820 | } |
1821 | ||
fd392cfa YK |
1822 | static void migrate_fd_cleanup_schedule(MigrationState *s) |
1823 | { | |
1824 | /* | |
1825 | * Ref the state for bh, because it may be called when | |
1826 | * there're already no other refs | |
1827 | */ | |
1828 | object_ref(OBJECT(s)); | |
1829 | qemu_bh_schedule(s->cleanup_bh); | |
1830 | } | |
1831 | ||
1832 | static void migrate_fd_cleanup_bh(void *opaque) | |
1833 | { | |
1834 | MigrationState *s = opaque; | |
1835 | migrate_fd_cleanup(s); | |
1836 | object_unref(OBJECT(s)); | |
1837 | } | |
1838 | ||
87db1a7d JQ |
1839 | void migrate_set_error(MigrationState *s, const Error *error) |
1840 | { | |
6e8a355d | 1841 | QEMU_LOCK_GUARD(&s->error_mutex); |
87db1a7d JQ |
1842 | if (!s->error) { |
1843 | s->error = error_copy(error); | |
1844 | } | |
87db1a7d JQ |
1845 | } |
1846 | ||
ca7bd082 PX |
1847 | static void migrate_error_free(MigrationState *s) |
1848 | { | |
1849 | QEMU_LOCK_GUARD(&s->error_mutex); | |
1850 | if (s->error) { | |
1851 | error_free(s->error); | |
1852 | s->error = NULL; | |
1853 | } | |
1854 | } | |
1855 | ||
d59ce6f3 | 1856 | void migrate_fd_error(MigrationState *s, const Error *error) |
065e2813 | 1857 | { |
25174055 | 1858 | trace_migrate_fd_error(error_get_pretty(error)); |
89a02a9f | 1859 | assert(s->to_dst_file == NULL); |
48781e5b HZ |
1860 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
1861 | MIGRATION_STATUS_FAILED); | |
87db1a7d | 1862 | migrate_set_error(s, error); |
458cf28e JQ |
1863 | } |
1864 | ||
0edda1c4 | 1865 | static void migrate_fd_cancel(MigrationState *s) |
065e2813 | 1866 | { |
6f2b811a | 1867 | int old_state ; |
89a02a9f | 1868 | QEMUFile *f = migrate_get_current()->to_dst_file; |
9013dca5 | 1869 | trace_migrate_fd_cancel(); |
065e2813 | 1870 | |
43044ac0 PX |
1871 | WITH_QEMU_LOCK_GUARD(&s->qemu_file_lock) { |
1872 | if (s->rp_state.from_dst_file) { | |
1873 | /* shutdown the rp socket, so causing the rp thread to shutdown */ | |
1874 | qemu_file_shutdown(s->rp_state.from_dst_file); | |
1875 | } | |
70b20477 DDAG |
1876 | } |
1877 | ||
6f2b811a Z |
1878 | do { |
1879 | old_state = s->state; | |
392d87e2 | 1880 | if (!migration_is_running(old_state)) { |
6f2b811a Z |
1881 | break; |
1882 | } | |
a7b36b48 DDAG |
1883 | /* If the migration is paused, kick it out of the pause */ |
1884 | if (old_state == MIGRATION_STATUS_PRE_SWITCHOVER) { | |
1885 | qemu_sem_post(&s->pause_sem); | |
1886 | } | |
48781e5b | 1887 | migrate_set_state(&s->state, old_state, MIGRATION_STATUS_CANCELLING); |
31194731 | 1888 | } while (s->state != MIGRATION_STATUS_CANCELLING); |
a26ba26e DDAG |
1889 | |
1890 | /* | |
1891 | * If we're unlucky the migration code might be stuck somewhere in a | |
1892 | * send/write while the network has failed and is waiting to timeout; | |
1893 | * if we've got shutdown(2) available then we can force it to quit. | |
1894 | * The outgoing qemu file gets closed in migrate_fd_cleanup that is | |
1895 | * called in a bh, so there is no race against this cancel. | |
1896 | */ | |
31194731 | 1897 | if (s->state == MIGRATION_STATUS_CANCELLING && f) { |
a26ba26e DDAG |
1898 | qemu_file_shutdown(f); |
1899 | } | |
1d2acc31 HZ |
1900 | if (s->state == MIGRATION_STATUS_CANCELLING && s->block_inactive) { |
1901 | Error *local_err = NULL; | |
1902 | ||
1903 | bdrv_invalidate_cache_all(&local_err); | |
1904 | if (local_err) { | |
1905 | error_report_err(local_err); | |
1906 | } else { | |
1907 | s->block_inactive = false; | |
1908 | } | |
1909 | } | |
065e2813 AL |
1910 | } |
1911 | ||
99a0db9b GH |
1912 | void add_migration_state_change_notifier(Notifier *notify) |
1913 | { | |
1914 | notifier_list_add(&migration_state_notifiers, notify); | |
1915 | } | |
1916 | ||
1917 | void remove_migration_state_change_notifier(Notifier *notify) | |
1918 | { | |
31552529 | 1919 | notifier_remove(notify); |
99a0db9b GH |
1920 | } |
1921 | ||
02edd2e7 | 1922 | bool migration_in_setup(MigrationState *s) |
afe2df69 | 1923 | { |
31194731 | 1924 | return s->state == MIGRATION_STATUS_SETUP; |
afe2df69 GH |
1925 | } |
1926 | ||
7073693b | 1927 | bool migration_has_finished(MigrationState *s) |
99a0db9b | 1928 | { |
31194731 | 1929 | return s->state == MIGRATION_STATUS_COMPLETED; |
99a0db9b | 1930 | } |
0edda1c4 | 1931 | |
afe2df69 GH |
1932 | bool migration_has_failed(MigrationState *s) |
1933 | { | |
31194731 HZ |
1934 | return (s->state == MIGRATION_STATUS_CANCELLED || |
1935 | s->state == MIGRATION_STATUS_FAILED); | |
afe2df69 GH |
1936 | } |
1937 | ||
5727309d | 1938 | bool migration_in_postcopy(void) |
9ec055ae | 1939 | { |
5727309d JQ |
1940 | MigrationState *s = migrate_get_current(); |
1941 | ||
3748fef9 DDAG |
1942 | switch (s->state) { |
1943 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: | |
1944 | case MIGRATION_STATUS_POSTCOPY_PAUSED: | |
1945 | case MIGRATION_STATUS_POSTCOPY_RECOVER: | |
1946 | return true; | |
1947 | default: | |
1948 | return false; | |
1949 | } | |
9ec055ae DDAG |
1950 | } |
1951 | ||
b82fc321 DDAG |
1952 | bool migration_in_postcopy_after_devices(MigrationState *s) |
1953 | { | |
5727309d | 1954 | return migration_in_postcopy() && s->postcopy_after_devices; |
b82fc321 DDAG |
1955 | } |
1956 | ||
06df2e69 DH |
1957 | bool migration_in_incoming_postcopy(void) |
1958 | { | |
1959 | PostcopyState ps = postcopy_state_get(); | |
1960 | ||
1961 | return ps >= POSTCOPY_INCOMING_DISCARD && ps < POSTCOPY_INCOMING_END; | |
1962 | } | |
1963 | ||
1a8e44a8 AG |
1964 | bool migration_in_bg_snapshot(void) |
1965 | { | |
1966 | MigrationState *s = migrate_get_current(); | |
1967 | ||
1968 | return migrate_background_snapshot() && | |
1969 | migration_is_setup_or_active(s->state); | |
1970 | } | |
1971 | ||
fab35005 | 1972 | bool migration_is_idle(void) |
fe44dc91 | 1973 | { |
daff7f0b MA |
1974 | MigrationState *s = current_migration; |
1975 | ||
1976 | if (!s) { | |
1977 | return true; | |
1978 | } | |
fe44dc91 AA |
1979 | |
1980 | switch (s->state) { | |
1981 | case MIGRATION_STATUS_NONE: | |
1982 | case MIGRATION_STATUS_CANCELLED: | |
1983 | case MIGRATION_STATUS_COMPLETED: | |
1984 | case MIGRATION_STATUS_FAILED: | |
1985 | return true; | |
1986 | case MIGRATION_STATUS_SETUP: | |
1987 | case MIGRATION_STATUS_CANCELLING: | |
1988 | case MIGRATION_STATUS_ACTIVE: | |
1989 | case MIGRATION_STATUS_POSTCOPY_ACTIVE: | |
1990 | case MIGRATION_STATUS_COLO: | |
31e06077 DDAG |
1991 | case MIGRATION_STATUS_PRE_SWITCHOVER: |
1992 | case MIGRATION_STATUS_DEVICE: | |
c7e0acd5 | 1993 | case MIGRATION_STATUS_WAIT_UNPLUG: |
fe44dc91 AA |
1994 | return false; |
1995 | case MIGRATION_STATUS__MAX: | |
1996 | g_assert_not_reached(); | |
1997 | } | |
1998 | ||
1999 | return false; | |
2000 | } | |
2001 | ||
8f8d528e WY |
2002 | bool migration_is_active(MigrationState *s) |
2003 | { | |
2004 | return (s->state == MIGRATION_STATUS_ACTIVE || | |
2005 | s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
2006 | } | |
2007 | ||
3e0c8050 | 2008 | void migrate_init(MigrationState *s) |
0edda1c4 | 2009 | { |
389775d1 DDAG |
2010 | /* |
2011 | * Reinitialise all migration state, except | |
2012 | * parameters/capabilities that the user set, and | |
2013 | * locks. | |
2014 | */ | |
389775d1 | 2015 | s->cleanup_bh = 0; |
8518278a | 2016 | s->vm_start_bh = 0; |
89a02a9f | 2017 | s->to_dst_file = NULL; |
389775d1 | 2018 | s->state = MIGRATION_STATUS_NONE; |
389775d1 DDAG |
2019 | s->rp_state.from_dst_file = NULL; |
2020 | s->rp_state.error = false; | |
2021 | s->mbps = 0.0; | |
aecbfe9c | 2022 | s->pages_per_second = 0.0; |
389775d1 DDAG |
2023 | s->downtime = 0; |
2024 | s->expected_downtime = 0; | |
389775d1 | 2025 | s->setup_time = 0; |
389775d1 | 2026 | s->start_postcopy = false; |
b82fc321 | 2027 | s->postcopy_after_devices = false; |
389775d1 | 2028 | s->migration_thread_running = false; |
d59ce6f3 DB |
2029 | error_free(s->error); |
2030 | s->error = NULL; | |
d8053e73 | 2031 | s->hostname = NULL; |
389775d1 | 2032 | |
48781e5b | 2033 | migrate_set_state(&s->state, MIGRATION_STATUS_NONE, MIGRATION_STATUS_SETUP); |
0edda1c4 | 2034 | |
4af246a3 PX |
2035 | s->start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
2036 | s->total_time = 0; | |
7287cbd4 | 2037 | s->vm_was_running = false; |
b15df1ae PX |
2038 | s->iteration_initial_bytes = 0; |
2039 | s->threshold_size = 0; | |
0edda1c4 | 2040 | } |
cab30143 | 2041 | |
fe44dc91 | 2042 | int migrate_add_blocker(Error *reason, Error **errp) |
fa2756b7 | 2043 | { |
811f8652 | 2044 | if (only_migratable) { |
4b576648 MA |
2045 | error_propagate_prepend(errp, error_copy(reason), |
2046 | "disallowing migration blocker " | |
b6eca81e | 2047 | "(--only-migratable) for: "); |
b67b8c3a AA |
2048 | return -EACCES; |
2049 | } | |
2050 | ||
fab35005 | 2051 | if (migration_is_idle()) { |
fe44dc91 AA |
2052 | migration_blockers = g_slist_prepend(migration_blockers, reason); |
2053 | return 0; | |
2054 | } | |
2055 | ||
4b576648 MA |
2056 | error_propagate_prepend(errp, error_copy(reason), |
2057 | "disallowing migration blocker " | |
2058 | "(migration in progress) for: "); | |
fe44dc91 | 2059 | return -EBUSY; |
fa2756b7 AL |
2060 | } |
2061 | ||
2062 | void migrate_del_blocker(Error *reason) | |
2063 | { | |
2064 | migration_blockers = g_slist_remove(migration_blockers, reason); | |
2065 | } | |
2066 | ||
bf1ae1f4 DDAG |
2067 | void qmp_migrate_incoming(const char *uri, Error **errp) |
2068 | { | |
2069 | Error *local_err = NULL; | |
4debb5f5 | 2070 | static bool once = true; |
bf1ae1f4 | 2071 | |
4debb5f5 DDAG |
2072 | if (!once) { |
2073 | error_setg(errp, "The incoming migration has already been started"); | |
603d5a42 | 2074 | return; |
4debb5f5 | 2075 | } |
e69d50d6 PB |
2076 | if (!runstate_check(RUN_STATE_INMIGRATE)) { |
2077 | error_setg(errp, "'-incoming' was not specified on the command line"); | |
2078 | return; | |
2079 | } | |
bf1ae1f4 | 2080 | |
cc48c587 PX |
2081 | if (!yank_register_instance(MIGRATION_YANK_INSTANCE, errp)) { |
2082 | return; | |
2083 | } | |
2084 | ||
bf1ae1f4 DDAG |
2085 | qemu_start_incoming_migration(uri, &local_err); |
2086 | ||
2087 | if (local_err) { | |
cc48c587 | 2088 | yank_unregister_instance(MIGRATION_YANK_INSTANCE); |
bf1ae1f4 DDAG |
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 | ||
b7f9afd4 PX |
2100 | /* |
2101 | * Don't even bother to use ERRP_GUARD() as it _must_ always be set by | |
2102 | * callers (no one should ignore a recover failure); if there is, it's a | |
2103 | * programming error. | |
2104 | */ | |
2105 | assert(errp); | |
2106 | ||
02affd41 PX |
2107 | if (mis->state != MIGRATION_STATUS_POSTCOPY_PAUSED) { |
2108 | error_setg(errp, "Migrate recover can only be run " | |
2109 | "when postcopy is paused."); | |
2110 | return; | |
2111 | } | |
2112 | ||
d73415a3 | 2113 | if (qatomic_cmpxchg(&mis->postcopy_recover_triggered, |
02affd41 PX |
2114 | false, true) == true) { |
2115 | error_setg(errp, "Migrate recovery is triggered already"); | |
2116 | return; | |
2117 | } | |
2118 | ||
2119 | /* | |
2120 | * Note that this call will never start a real migration; it will | |
2121 | * only re-setup the migration stream and poke existing migration | |
2122 | * to continue using that newly established channel. | |
2123 | */ | |
2124 | qemu_start_incoming_migration(uri, errp); | |
b7f9afd4 PX |
2125 | |
2126 | /* Safe to dereference with the assert above */ | |
2127 | if (*errp) { | |
2128 | /* Reset the flag so user could still retry */ | |
2129 | qatomic_set(&mis->postcopy_recover_triggered, false); | |
2130 | } | |
02affd41 PX |
2131 | } |
2132 | ||
bfbf89c2 PX |
2133 | void qmp_migrate_pause(Error **errp) |
2134 | { | |
2135 | MigrationState *ms = migrate_get_current(); | |
2136 | MigrationIncomingState *mis = migration_incoming_get_current(); | |
2137 | int ret; | |
2138 | ||
2139 | if (ms->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { | |
2140 | /* Source side, during postcopy */ | |
2141 | qemu_mutex_lock(&ms->qemu_file_lock); | |
2142 | ret = qemu_file_shutdown(ms->to_dst_file); | |
2143 | qemu_mutex_unlock(&ms->qemu_file_lock); | |
2144 | if (ret) { | |
2145 | error_setg(errp, "Failed to pause source migration"); | |
2146 | } | |
2147 | return; | |
2148 | } | |
2149 | ||
2150 | if (mis->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { | |
2151 | ret = qemu_file_shutdown(mis->from_src_file); | |
2152 | if (ret) { | |
2153 | error_setg(errp, "Failed to pause destination migration"); | |
2154 | } | |
2155 | return; | |
2156 | } | |
2157 | ||
2158 | error_setg(errp, "migrate-pause is currently only supported " | |
2159 | "during postcopy-active state"); | |
2160 | } | |
2161 | ||
24f3902b GK |
2162 | bool migration_is_blocked(Error **errp) |
2163 | { | |
2164 | if (qemu_savevm_state_blocked(errp)) { | |
2165 | return true; | |
2166 | } | |
2167 | ||
2168 | if (migration_blockers) { | |
250561e1 | 2169 | error_propagate(errp, error_copy(migration_blockers->data)); |
24f3902b GK |
2170 | return true; |
2171 | } | |
2172 | ||
2173 | return false; | |
2174 | } | |
2175 | ||
d3e35b8f PX |
2176 | /* Returns true if continue to migrate, or false if error detected */ |
2177 | static bool migrate_prepare(MigrationState *s, bool blk, bool blk_inc, | |
2178 | bool resume, Error **errp) | |
cab30143 | 2179 | { |
be7059cd | 2180 | Error *local_err = NULL; |
d3e35b8f PX |
2181 | |
2182 | if (resume) { | |
2183 | if (s->state != MIGRATION_STATUS_POSTCOPY_PAUSED) { | |
2184 | error_setg(errp, "Cannot resume if there is no " | |
2185 | "paused migration"); | |
2186 | return false; | |
2187 | } | |
97ca211c PX |
2188 | |
2189 | /* | |
2190 | * Postcopy recovery won't work well with release-ram | |
2191 | * capability since release-ram will drop the page buffer as | |
2192 | * long as the page is put into the send buffer. So if there | |
2193 | * is a network failure happened, any page buffers that have | |
2194 | * not yet reached the destination VM but have already been | |
2195 | * sent from the source VM will be lost forever. Let's refuse | |
2196 | * the client from resuming such a postcopy migration. | |
2197 | * Luckily release-ram was designed to only be used when src | |
2198 | * and destination VMs are on the same host, so it should be | |
2199 | * fine. | |
2200 | */ | |
2201 | if (migrate_release_ram()) { | |
2202 | error_setg(errp, "Postcopy recovery cannot work " | |
2203 | "when release-ram capability is set"); | |
2204 | return false; | |
2205 | } | |
2206 | ||
d3e35b8f PX |
2207 | /* This is a resume, skip init status */ |
2208 | return true; | |
2209 | } | |
cab30143 | 2210 | |
392d87e2 | 2211 | if (migration_is_running(s->state)) { |
c6bd8c70 | 2212 | error_setg(errp, QERR_MIGRATION_ACTIVE); |
d3e35b8f | 2213 | return false; |
cab30143 | 2214 | } |
d3e35b8f | 2215 | |
ca99993a DDAG |
2216 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
2217 | error_setg(errp, "Guest is waiting for an incoming migration"); | |
d3e35b8f | 2218 | return false; |
ca99993a DDAG |
2219 | } |
2220 | ||
36d0fe65 T |
2221 | if (runstate_check(RUN_STATE_POSTMIGRATE)) { |
2222 | error_setg(errp, "Can't migrate the vm that was paused due to " | |
2223 | "previous migration"); | |
2224 | return false; | |
2225 | } | |
2226 | ||
24f3902b | 2227 | if (migration_is_blocked(errp)) { |
d3e35b8f | 2228 | return false; |
fa2756b7 AL |
2229 | } |
2230 | ||
d3e35b8f | 2231 | if (blk || blk_inc) { |
3ba02445 RL |
2232 | if (migrate_colo_enabled()) { |
2233 | error_setg(errp, "No disk migration is required in COLO mode"); | |
2234 | return false; | |
2235 | } | |
2833c59b JQ |
2236 | if (migrate_use_block() || migrate_use_block_incremental()) { |
2237 | error_setg(errp, "Command options are incompatible with " | |
2238 | "current migration capabilities"); | |
d3e35b8f | 2239 | return false; |
2833c59b JQ |
2240 | } |
2241 | migrate_set_block_enabled(true, &local_err); | |
2242 | if (local_err) { | |
2243 | error_propagate(errp, local_err); | |
d3e35b8f | 2244 | return false; |
2833c59b JQ |
2245 | } |
2246 | s->must_remove_block_options = true; | |
2247 | } | |
2248 | ||
d3e35b8f | 2249 | if (blk_inc) { |
2833c59b JQ |
2250 | migrate_set_block_incremental(s, true); |
2251 | } | |
2252 | ||
3e0c8050 | 2253 | migrate_init(s); |
87f3bd87 IR |
2254 | /* |
2255 | * set ram_counters memory to zero for a | |
2256 | * new migration | |
2257 | */ | |
2258 | memset(&ram_counters, 0, sizeof(ram_counters)); | |
cab30143 | 2259 | |
d3e35b8f PX |
2260 | return true; |
2261 | } | |
2262 | ||
2263 | void qmp_migrate(const char *uri, bool has_blk, bool blk, | |
2264 | bool has_inc, bool inc, bool has_detach, bool detach, | |
2265 | bool has_resume, bool resume, Error **errp) | |
2266 | { | |
2267 | Error *local_err = NULL; | |
2268 | MigrationState *s = migrate_get_current(); | |
d658f65c | 2269 | const char *p = NULL; |
d3e35b8f PX |
2270 | |
2271 | if (!migrate_prepare(s, has_blk && blk, has_inc && inc, | |
2272 | has_resume && resume, errp)) { | |
2273 | /* Error detected, put into errp */ | |
2274 | return; | |
2275 | } | |
2276 | ||
b5eea99e LS |
2277 | if (!(has_resume && resume)) { |
2278 | if (!yank_register_instance(MIGRATION_YANK_INSTANCE, errp)) { | |
2279 | return; | |
2280 | } | |
2281 | } | |
2282 | ||
d658f65c | 2283 | if (strstart(uri, "tcp:", &p) || |
9ba3b2ba LM |
2284 | strstart(uri, "unix:", NULL) || |
2285 | strstart(uri, "vsock:", NULL)) { | |
d658f65c | 2286 | socket_start_outgoing_migration(s, p ? p : uri, &local_err); |
2da776db | 2287 | #ifdef CONFIG_RDMA |
41310c68 | 2288 | } else if (strstart(uri, "rdma:", &p)) { |
2da776db MH |
2289 | rdma_start_outgoing_migration(s, p, &local_err); |
2290 | #endif | |
cab30143 | 2291 | } else if (strstart(uri, "exec:", &p)) { |
f37afb5a | 2292 | exec_start_outgoing_migration(s, p, &local_err); |
cab30143 | 2293 | } else if (strstart(uri, "fd:", &p)) { |
f37afb5a | 2294 | fd_start_outgoing_migration(s, p, &local_err); |
99a0db9b | 2295 | } else { |
b5eea99e LS |
2296 | if (!(has_resume && resume)) { |
2297 | yank_unregister_instance(MIGRATION_YANK_INSTANCE); | |
2298 | } | |
c6bd8c70 MA |
2299 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "uri", |
2300 | "a valid migration protocol"); | |
48781e5b HZ |
2301 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
2302 | MIGRATION_STATUS_FAILED); | |
09576e74 | 2303 | block_cleanup_parameters(s); |
e1c37d0e | 2304 | return; |
cab30143 JQ |
2305 | } |
2306 | ||
f37afb5a | 2307 | if (local_err) { |
b5eea99e LS |
2308 | if (!(has_resume && resume)) { |
2309 | yank_unregister_instance(MIGRATION_YANK_INSTANCE); | |
2310 | } | |
d59ce6f3 | 2311 | migrate_fd_error(s, local_err); |
f37afb5a | 2312 | error_propagate(errp, local_err); |
e1c37d0e | 2313 | return; |
1299c631 | 2314 | } |
cab30143 JQ |
2315 | } |
2316 | ||
6cdedb07 | 2317 | void qmp_migrate_cancel(Error **errp) |
cab30143 | 2318 | { |
c7c0e724 | 2319 | migration_cancel(); |
cab30143 JQ |
2320 | } |
2321 | ||
89cfc02c DDAG |
2322 | void qmp_migrate_continue(MigrationStatus state, Error **errp) |
2323 | { | |
2324 | MigrationState *s = migrate_get_current(); | |
2325 | if (s->state != state) { | |
2326 | error_setg(errp, "Migration not in expected state: %s", | |
2327 | MigrationStatus_str(s->state)); | |
2328 | return; | |
2329 | } | |
2330 | qemu_sem_post(&s->pause_sem); | |
2331 | } | |
2332 | ||
53f09a10 PB |
2333 | bool migrate_release_ram(void) |
2334 | { | |
2335 | MigrationState *s; | |
2336 | ||
2337 | s = migrate_get_current(); | |
2338 | ||
2339 | return s->enabled_capabilities[MIGRATION_CAPABILITY_RELEASE_RAM]; | |
2340 | } | |
2341 | ||
53dd370c DDAG |
2342 | bool migrate_postcopy_ram(void) |
2343 | { | |
2344 | MigrationState *s; | |
2345 | ||
2346 | s = migrate_get_current(); | |
2347 | ||
32c3db5b | 2348 | return s->enabled_capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM]; |
53dd370c DDAG |
2349 | } |
2350 | ||
58110f0a VSO |
2351 | bool migrate_postcopy(void) |
2352 | { | |
dd6bb914 | 2353 | return migrate_postcopy_ram() || migrate_dirty_bitmaps(); |
58110f0a VSO |
2354 | } |
2355 | ||
bde1e2ec CV |
2356 | bool migrate_auto_converge(void) |
2357 | { | |
2358 | MigrationState *s; | |
2359 | ||
2360 | s = migrate_get_current(); | |
2361 | ||
2362 | return s->enabled_capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE]; | |
2363 | } | |
2364 | ||
323004a3 PL |
2365 | bool migrate_zero_blocks(void) |
2366 | { | |
2367 | MigrationState *s; | |
2368 | ||
2369 | s = migrate_get_current(); | |
2370 | ||
2371 | return s->enabled_capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS]; | |
2372 | } | |
2373 | ||
f22f928e AP |
2374 | bool migrate_postcopy_blocktime(void) |
2375 | { | |
2376 | MigrationState *s; | |
2377 | ||
2378 | s = migrate_get_current(); | |
2379 | ||
2380 | return s->enabled_capabilities[MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME]; | |
2381 | } | |
2382 | ||
8706d2d5 LL |
2383 | bool migrate_use_compression(void) |
2384 | { | |
dde4e694 LL |
2385 | MigrationState *s; |
2386 | ||
2387 | s = migrate_get_current(); | |
2388 | ||
2389 | return s->enabled_capabilities[MIGRATION_CAPABILITY_COMPRESS]; | |
8706d2d5 LL |
2390 | } |
2391 | ||
2392 | int migrate_compress_level(void) | |
2393 | { | |
2394 | MigrationState *s; | |
2395 | ||
2396 | s = migrate_get_current(); | |
2397 | ||
2594f56d | 2398 | return s->parameters.compress_level; |
8706d2d5 LL |
2399 | } |
2400 | ||
2401 | int migrate_compress_threads(void) | |
2402 | { | |
2403 | MigrationState *s; | |
2404 | ||
2405 | s = migrate_get_current(); | |
2406 | ||
2594f56d | 2407 | return s->parameters.compress_threads; |
8706d2d5 LL |
2408 | } |
2409 | ||
1d58872a XG |
2410 | int migrate_compress_wait_thread(void) |
2411 | { | |
2412 | MigrationState *s; | |
2413 | ||
2414 | s = migrate_get_current(); | |
2415 | ||
2416 | return s->parameters.compress_wait_thread; | |
2417 | } | |
2418 | ||
3fcb38c2 LL |
2419 | int migrate_decompress_threads(void) |
2420 | { | |
2421 | MigrationState *s; | |
2422 | ||
2423 | s = migrate_get_current(); | |
2424 | ||
2594f56d | 2425 | return s->parameters.decompress_threads; |
3fcb38c2 LL |
2426 | } |
2427 | ||
55efc8c2 VSO |
2428 | bool migrate_dirty_bitmaps(void) |
2429 | { | |
2430 | MigrationState *s; | |
2431 | ||
2432 | s = migrate_get_current(); | |
2433 | ||
2434 | return s->enabled_capabilities[MIGRATION_CAPABILITY_DIRTY_BITMAPS]; | |
2435 | } | |
2436 | ||
18269069 YK |
2437 | bool migrate_ignore_shared(void) |
2438 | { | |
2439 | MigrationState *s; | |
2440 | ||
2441 | s = migrate_get_current(); | |
2442 | ||
2443 | return s->enabled_capabilities[MIGRATION_CAPABILITY_X_IGNORE_SHARED]; | |
2444 | } | |
2445 | ||
b9d68df6 YK |
2446 | bool migrate_validate_uuid(void) |
2447 | { | |
2448 | MigrationState *s; | |
2449 | ||
2450 | s = migrate_get_current(); | |
2451 | ||
2452 | return s->enabled_capabilities[MIGRATION_CAPABILITY_VALIDATE_UUID]; | |
2453 | } | |
2454 | ||
b05dc723 JQ |
2455 | bool migrate_use_events(void) |
2456 | { | |
2457 | MigrationState *s; | |
2458 | ||
2459 | s = migrate_get_current(); | |
2460 | ||
2461 | return s->enabled_capabilities[MIGRATION_CAPABILITY_EVENTS]; | |
2462 | } | |
2463 | ||
30126bbf JQ |
2464 | bool migrate_use_multifd(void) |
2465 | { | |
2466 | MigrationState *s; | |
2467 | ||
2468 | s = migrate_get_current(); | |
2469 | ||
cbfd6c95 | 2470 | return s->enabled_capabilities[MIGRATION_CAPABILITY_MULTIFD]; |
30126bbf JQ |
2471 | } |
2472 | ||
93fbd031 DDAG |
2473 | bool migrate_pause_before_switchover(void) |
2474 | { | |
2475 | MigrationState *s; | |
2476 | ||
2477 | s = migrate_get_current(); | |
2478 | ||
2479 | return s->enabled_capabilities[ | |
2480 | MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER]; | |
2481 | } | |
2482 | ||
4075fb1c JQ |
2483 | int migrate_multifd_channels(void) |
2484 | { | |
2485 | MigrationState *s; | |
2486 | ||
2487 | s = migrate_get_current(); | |
2488 | ||
cbfd6c95 | 2489 | return s->parameters.multifd_channels; |
4075fb1c JQ |
2490 | } |
2491 | ||
ab7cbb0b JQ |
2492 | MultiFDCompression migrate_multifd_compression(void) |
2493 | { | |
2494 | MigrationState *s; | |
2495 | ||
2496 | s = migrate_get_current(); | |
2497 | ||
2498 | return s->parameters.multifd_compression; | |
2499 | } | |
2500 | ||
9004db48 JQ |
2501 | int migrate_multifd_zlib_level(void) |
2502 | { | |
2503 | MigrationState *s; | |
2504 | ||
2505 | s = migrate_get_current(); | |
2506 | ||
2507 | return s->parameters.multifd_zlib_level; | |
2508 | } | |
2509 | ||
6a9ad154 JQ |
2510 | int migrate_multifd_zstd_level(void) |
2511 | { | |
2512 | MigrationState *s; | |
2513 | ||
2514 | s = migrate_get_current(); | |
2515 | ||
2516 | return s->parameters.multifd_zstd_level; | |
2517 | } | |
2518 | ||
17ad9b35 OW |
2519 | int migrate_use_xbzrle(void) |
2520 | { | |
2521 | MigrationState *s; | |
2522 | ||
2523 | s = migrate_get_current(); | |
2524 | ||
2525 | return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE]; | |
2526 | } | |
2527 | ||
8b9407a0 | 2528 | uint64_t migrate_xbzrle_cache_size(void) |
17ad9b35 OW |
2529 | { |
2530 | MigrationState *s; | |
2531 | ||
2532 | s = migrate_get_current(); | |
2533 | ||
73af8dd8 | 2534 | return s->parameters.xbzrle_cache_size; |
17ad9b35 | 2535 | } |
0d82d0e8 | 2536 | |
7e555c6c DDAG |
2537 | static int64_t migrate_max_postcopy_bandwidth(void) |
2538 | { | |
2539 | MigrationState *s; | |
2540 | ||
2541 | s = migrate_get_current(); | |
2542 | ||
2543 | return s->parameters.max_postcopy_bandwidth; | |
2544 | } | |
2545 | ||
2833c59b JQ |
2546 | bool migrate_use_block(void) |
2547 | { | |
2548 | MigrationState *s; | |
2549 | ||
2550 | s = migrate_get_current(); | |
2551 | ||
2552 | return s->enabled_capabilities[MIGRATION_CAPABILITY_BLOCK]; | |
2553 | } | |
2554 | ||
c788ada8 PX |
2555 | bool migrate_use_return_path(void) |
2556 | { | |
2557 | MigrationState *s; | |
2558 | ||
2559 | s = migrate_get_current(); | |
2560 | ||
2561 | return s->enabled_capabilities[MIGRATION_CAPABILITY_RETURN_PATH]; | |
2562 | } | |
2563 | ||
2833c59b JQ |
2564 | bool migrate_use_block_incremental(void) |
2565 | { | |
2566 | MigrationState *s; | |
2567 | ||
2568 | s = migrate_get_current(); | |
2569 | ||
2570 | return s->parameters.block_incremental; | |
2571 | } | |
2572 | ||
6e8c25b4 AG |
2573 | bool migrate_background_snapshot(void) |
2574 | { | |
2575 | MigrationState *s; | |
2576 | ||
2577 | s = migrate_get_current(); | |
2578 | ||
2579 | return s->enabled_capabilities[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]; | |
2580 | } | |
2581 | ||
70b20477 DDAG |
2582 | /* migration thread support */ |
2583 | /* | |
2584 | * Something bad happened to the RP stream, mark an error | |
2585 | * The caller shall print or trace something to indicate why | |
2586 | */ | |
2587 | static void mark_source_rp_bad(MigrationState *s) | |
2588 | { | |
2589 | s->rp_state.error = true; | |
2590 | } | |
2591 | ||
2592 | static struct rp_cmd_args { | |
2593 | ssize_t len; /* -1 = variable */ | |
2594 | const char *name; | |
2595 | } rp_cmd_args[] = { | |
2596 | [MIG_RP_MSG_INVALID] = { .len = -1, .name = "INVALID" }, | |
2597 | [MIG_RP_MSG_SHUT] = { .len = 4, .name = "SHUT" }, | |
2598 | [MIG_RP_MSG_PONG] = { .len = 4, .name = "PONG" }, | |
1e2d90eb DDAG |
2599 | [MIG_RP_MSG_REQ_PAGES] = { .len = 12, .name = "REQ_PAGES" }, |
2600 | [MIG_RP_MSG_REQ_PAGES_ID] = { .len = -1, .name = "REQ_PAGES_ID" }, | |
a335debb | 2601 | [MIG_RP_MSG_RECV_BITMAP] = { .len = -1, .name = "RECV_BITMAP" }, |
13955b89 | 2602 | [MIG_RP_MSG_RESUME_ACK] = { .len = 4, .name = "RESUME_ACK" }, |
70b20477 DDAG |
2603 | [MIG_RP_MSG_MAX] = { .len = -1, .name = "MAX" }, |
2604 | }; | |
2605 | ||
1e2d90eb DDAG |
2606 | /* |
2607 | * Process a request for pages received on the return path, | |
2608 | * We're allowed to send more than requested (e.g. to round to our page size) | |
2609 | * and we don't need to send pages that have already been sent. | |
2610 | */ | |
2611 | static void migrate_handle_rp_req_pages(MigrationState *ms, const char* rbname, | |
2612 | ram_addr_t start, size_t len) | |
2613 | { | |
038adc2f | 2614 | long our_host_ps = qemu_real_host_page_size; |
6c595cde | 2615 | |
1e2d90eb | 2616 | trace_migrate_handle_rp_req_pages(rbname, start, len); |
6c595cde DDAG |
2617 | |
2618 | /* | |
2619 | * Since we currently insist on matching page sizes, just sanity check | |
2620 | * we're being asked for whole host pages. | |
2621 | */ | |
395cb450 BY |
2622 | if (start & (our_host_ps - 1) || |
2623 | (len & (our_host_ps - 1))) { | |
6c595cde DDAG |
2624 | error_report("%s: Misaligned page request, start: " RAM_ADDR_FMT |
2625 | " len: %zd", __func__, start, len); | |
2626 | mark_source_rp_bad(ms); | |
2627 | return; | |
2628 | } | |
2629 | ||
96506894 | 2630 | if (ram_save_queue_pages(rbname, start, len)) { |
6c595cde DDAG |
2631 | mark_source_rp_bad(ms); |
2632 | } | |
1e2d90eb DDAG |
2633 | } |
2634 | ||
14b1742e PX |
2635 | /* Return true to retry, false to quit */ |
2636 | static bool postcopy_pause_return_path_thread(MigrationState *s) | |
2637 | { | |
2638 | trace_postcopy_pause_return_path(); | |
2639 | ||
2640 | qemu_sem_wait(&s->postcopy_pause_rp_sem); | |
2641 | ||
2642 | trace_postcopy_pause_return_path_continued(); | |
2643 | ||
2644 | return true; | |
2645 | } | |
2646 | ||
a335debb PX |
2647 | static int migrate_handle_rp_recv_bitmap(MigrationState *s, char *block_name) |
2648 | { | |
2649 | RAMBlock *block = qemu_ram_block_by_name(block_name); | |
2650 | ||
2651 | if (!block) { | |
2652 | error_report("%s: invalid block name '%s'", __func__, block_name); | |
2653 | return -EINVAL; | |
2654 | } | |
2655 | ||
2656 | /* Fetch the received bitmap and refresh the dirty bitmap */ | |
2657 | return ram_dirty_bitmap_reload(s, block); | |
2658 | } | |
2659 | ||
13955b89 PX |
2660 | static int migrate_handle_rp_resume_ack(MigrationState *s, uint32_t value) |
2661 | { | |
2662 | trace_source_return_path_thread_resume_ack(value); | |
2663 | ||
2664 | if (value != MIGRATION_RESUME_ACK_VALUE) { | |
2665 | error_report("%s: illegal resume_ack value %"PRIu32, | |
2666 | __func__, value); | |
2667 | return -1; | |
2668 | } | |
2669 | ||
2670 | /* Now both sides are active. */ | |
2671 | migrate_set_state(&s->state, MIGRATION_STATUS_POSTCOPY_RECOVER, | |
2672 | MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
2673 | ||
94190696 PX |
2674 | /* Notify send thread that time to continue send pages */ |
2675 | qemu_sem_post(&s->rp_state.rp_sem); | |
13955b89 PX |
2676 | |
2677 | return 0; | |
2678 | } | |
2679 | ||
43044ac0 PX |
2680 | /* Release ms->rp_state.from_dst_file in a safe way */ |
2681 | static void migration_release_from_dst_file(MigrationState *ms) | |
2682 | { | |
2683 | QEMUFile *file; | |
2684 | ||
2685 | WITH_QEMU_LOCK_GUARD(&ms->qemu_file_lock) { | |
2686 | /* | |
2687 | * Reset the from_dst_file pointer first before releasing it, as we | |
2688 | * can't block within lock section | |
2689 | */ | |
2690 | file = ms->rp_state.from_dst_file; | |
2691 | ms->rp_state.from_dst_file = NULL; | |
2692 | } | |
2693 | ||
2694 | qemu_fclose(file); | |
2695 | } | |
2696 | ||
70b20477 DDAG |
2697 | /* |
2698 | * Handles messages sent on the return path towards the source VM | |
2699 | * | |
2700 | */ | |
2701 | static void *source_return_path_thread(void *opaque) | |
2702 | { | |
2703 | MigrationState *ms = opaque; | |
2704 | QEMUFile *rp = ms->rp_state.from_dst_file; | |
2705 | uint16_t header_len, header_type; | |
568b01ca | 2706 | uint8_t buf[512]; |
70b20477 | 2707 | uint32_t tmp32, sibling_error; |
1e2d90eb DDAG |
2708 | ram_addr_t start = 0; /* =0 to silence warning */ |
2709 | size_t len = 0, expected_len; | |
70b20477 DDAG |
2710 | int res; |
2711 | ||
2712 | trace_source_return_path_thread_entry(); | |
74637e6f | 2713 | rcu_register_thread(); |
14b1742e PX |
2714 | |
2715 | retry: | |
70b20477 DDAG |
2716 | while (!ms->rp_state.error && !qemu_file_get_error(rp) && |
2717 | migration_is_setup_or_active(ms->state)) { | |
2718 | trace_source_return_path_thread_loop_top(); | |
2719 | header_type = qemu_get_be16(rp); | |
2720 | header_len = qemu_get_be16(rp); | |
2721 | ||
7a9ddfbf PX |
2722 | if (qemu_file_get_error(rp)) { |
2723 | mark_source_rp_bad(ms); | |
2724 | goto out; | |
2725 | } | |
2726 | ||
70b20477 DDAG |
2727 | if (header_type >= MIG_RP_MSG_MAX || |
2728 | header_type == MIG_RP_MSG_INVALID) { | |
2729 | error_report("RP: Received invalid message 0x%04x length 0x%04x", | |
ed8b2828 | 2730 | header_type, header_len); |
70b20477 DDAG |
2731 | mark_source_rp_bad(ms); |
2732 | goto out; | |
2733 | } | |
2734 | ||
2735 | if ((rp_cmd_args[header_type].len != -1 && | |
2736 | header_len != rp_cmd_args[header_type].len) || | |
568b01ca | 2737 | header_len > sizeof(buf)) { |
70b20477 | 2738 | error_report("RP: Received '%s' message (0x%04x) with" |
ed8b2828 MZ |
2739 | "incorrect length %d expecting %zu", |
2740 | rp_cmd_args[header_type].name, header_type, header_len, | |
2741 | (size_t)rp_cmd_args[header_type].len); | |
70b20477 DDAG |
2742 | mark_source_rp_bad(ms); |
2743 | goto out; | |
2744 | } | |
2745 | ||
2746 | /* We know we've got a valid header by this point */ | |
2747 | res = qemu_get_buffer(rp, buf, header_len); | |
2748 | if (res != header_len) { | |
2749 | error_report("RP: Failed reading data for message 0x%04x" | |
2750 | " read %d expected %d", | |
2751 | header_type, res, header_len); | |
2752 | mark_source_rp_bad(ms); | |
2753 | goto out; | |
2754 | } | |
2755 | ||
2756 | /* OK, we have the message and the data */ | |
2757 | switch (header_type) { | |
2758 | case MIG_RP_MSG_SHUT: | |
4d885131 | 2759 | sibling_error = ldl_be_p(buf); |
70b20477 DDAG |
2760 | trace_source_return_path_thread_shut(sibling_error); |
2761 | if (sibling_error) { | |
2762 | error_report("RP: Sibling indicated error %d", sibling_error); | |
2763 | mark_source_rp_bad(ms); | |
2764 | } | |
2765 | /* | |
2766 | * We'll let the main thread deal with closing the RP | |
2767 | * we could do a shutdown(2) on it, but we're the only user | |
2768 | * anyway, so there's nothing gained. | |
2769 | */ | |
2770 | goto out; | |
2771 | ||
2772 | case MIG_RP_MSG_PONG: | |
4d885131 | 2773 | tmp32 = ldl_be_p(buf); |
70b20477 DDAG |
2774 | trace_source_return_path_thread_pong(tmp32); |
2775 | break; | |
2776 | ||
1e2d90eb | 2777 | case MIG_RP_MSG_REQ_PAGES: |
4d885131 PM |
2778 | start = ldq_be_p(buf); |
2779 | len = ldl_be_p(buf + 8); | |
1e2d90eb DDAG |
2780 | migrate_handle_rp_req_pages(ms, NULL, start, len); |
2781 | break; | |
2782 | ||
2783 | case MIG_RP_MSG_REQ_PAGES_ID: | |
2784 | expected_len = 12 + 1; /* header + termination */ | |
2785 | ||
2786 | if (header_len >= expected_len) { | |
4d885131 PM |
2787 | start = ldq_be_p(buf); |
2788 | len = ldl_be_p(buf + 8); | |
1e2d90eb DDAG |
2789 | /* Now we expect an idstr */ |
2790 | tmp32 = buf[12]; /* Length of the following idstr */ | |
2791 | buf[13 + tmp32] = '\0'; | |
2792 | expected_len += tmp32; | |
2793 | } | |
2794 | if (header_len != expected_len) { | |
2795 | error_report("RP: Req_Page_id with length %d expecting %zd", | |
ed8b2828 | 2796 | header_len, expected_len); |
1e2d90eb DDAG |
2797 | mark_source_rp_bad(ms); |
2798 | goto out; | |
2799 | } | |
2800 | migrate_handle_rp_req_pages(ms, (char *)&buf[13], start, len); | |
2801 | break; | |
2802 | ||
a335debb PX |
2803 | case MIG_RP_MSG_RECV_BITMAP: |
2804 | if (header_len < 1) { | |
2805 | error_report("%s: missing block name", __func__); | |
2806 | mark_source_rp_bad(ms); | |
2807 | goto out; | |
2808 | } | |
2809 | /* Format: len (1B) + idstr (<255B). This ends the idstr. */ | |
2810 | buf[buf[0] + 1] = '\0'; | |
2811 | if (migrate_handle_rp_recv_bitmap(ms, (char *)(buf + 1))) { | |
2812 | mark_source_rp_bad(ms); | |
2813 | goto out; | |
2814 | } | |
2815 | break; | |
2816 | ||
13955b89 PX |
2817 | case MIG_RP_MSG_RESUME_ACK: |
2818 | tmp32 = ldl_be_p(buf); | |
2819 | if (migrate_handle_rp_resume_ack(ms, tmp32)) { | |
2820 | mark_source_rp_bad(ms); | |
2821 | goto out; | |
2822 | } | |
2823 | break; | |
2824 | ||
70b20477 DDAG |
2825 | default: |
2826 | break; | |
2827 | } | |
2828 | } | |
14b1742e PX |
2829 | |
2830 | out: | |
2831 | res = qemu_file_get_error(rp); | |
2832 | if (res) { | |
fb14a42a | 2833 | if (res == -EIO && migration_in_postcopy()) { |
14b1742e PX |
2834 | /* |
2835 | * Maybe there is something we can do: it looks like a | |
2836 | * network down issue, and we pause for a recovery. | |
2837 | */ | |
43044ac0 | 2838 | migration_release_from_dst_file(ms); |
2e3e3da3 | 2839 | rp = NULL; |
14b1742e | 2840 | if (postcopy_pause_return_path_thread(ms)) { |
43044ac0 PX |
2841 | /* |
2842 | * Reload rp, reset the rest. Referencing it is safe since | |
2843 | * it's reset only by us above, or when migration completes | |
2844 | */ | |
2e3e3da3 | 2845 | rp = ms->rp_state.from_dst_file; |
14b1742e PX |
2846 | ms->rp_state.error = false; |
2847 | goto retry; | |
2848 | } | |
2849 | } | |
2850 | ||
70b20477 DDAG |
2851 | trace_source_return_path_thread_bad_end(); |
2852 | mark_source_rp_bad(ms); | |
2853 | } | |
2854 | ||
2855 | trace_source_return_path_thread_end(); | |
43044ac0 | 2856 | migration_release_from_dst_file(ms); |
74637e6f | 2857 | rcu_unregister_thread(); |
70b20477 DDAG |
2858 | return NULL; |
2859 | } | |
2860 | ||
d3e35b8f PX |
2861 | static int open_return_path_on_source(MigrationState *ms, |
2862 | bool create_thread) | |
70b20477 | 2863 | { |
89a02a9f | 2864 | ms->rp_state.from_dst_file = qemu_file_get_return_path(ms->to_dst_file); |
70b20477 DDAG |
2865 | if (!ms->rp_state.from_dst_file) { |
2866 | return -1; | |
2867 | } | |
2868 | ||
2869 | trace_open_return_path_on_source(); | |
d3e35b8f PX |
2870 | |
2871 | if (!create_thread) { | |
2872 | /* We're done */ | |
2873 | return 0; | |
2874 | } | |
2875 | ||
70b20477 DDAG |
2876 | qemu_thread_create(&ms->rp_state.rp_thread, "return path", |
2877 | source_return_path_thread, ms, QEMU_THREAD_JOINABLE); | |
53021ea1 | 2878 | ms->rp_state.rp_thread_created = true; |
70b20477 DDAG |
2879 | |
2880 | trace_open_return_path_on_source_continue(); | |
2881 | ||
2882 | return 0; | |
2883 | } | |
2884 | ||
70b20477 DDAG |
2885 | /* Returns 0 if the RP was ok, otherwise there was an error on the RP */ |
2886 | static int await_return_path_close_on_source(MigrationState *ms) | |
2887 | { | |
2888 | /* | |
2889 | * If this is a normal exit then the destination will send a SHUT and the | |
2890 | * rp_thread will exit, however if there's an error we need to cause | |
2891 | * it to exit. | |
2892 | */ | |
89a02a9f | 2893 | if (qemu_file_get_error(ms->to_dst_file) && ms->rp_state.from_dst_file) { |
70b20477 DDAG |
2894 | /* |
2895 | * shutdown(2), if we have it, will cause it to unblock if it's stuck | |
2896 | * waiting for the destination. | |
2897 | */ | |
2898 | qemu_file_shutdown(ms->rp_state.from_dst_file); | |
2899 | mark_source_rp_bad(ms); | |
2900 | } | |
2901 | trace_await_return_path_close_on_source_joining(); | |
2902 | qemu_thread_join(&ms->rp_state.rp_thread); | |
53021ea1 | 2903 | ms->rp_state.rp_thread_created = false; |
70b20477 DDAG |
2904 | trace_await_return_path_close_on_source_close(); |
2905 | return ms->rp_state.error; | |
2906 | } | |
2907 | ||
1d34e4bf DDAG |
2908 | /* |
2909 | * Switch from normal iteration to postcopy | |
2910 | * Returns non-0 on error | |
2911 | */ | |
7287cbd4 | 2912 | static int postcopy_start(MigrationState *ms) |
1d34e4bf DDAG |
2913 | { |
2914 | int ret; | |
61b67d47 DB |
2915 | QIOChannelBuffer *bioc; |
2916 | QEMUFile *fb; | |
1d34e4bf | 2917 | int64_t time_at_stop = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
7e555c6c | 2918 | int64_t bandwidth = migrate_max_postcopy_bandwidth(); |
ef8d6488 | 2919 | bool restart_block = false; |
0331c8ca DDAG |
2920 | int cur_state = MIGRATION_STATUS_ACTIVE; |
2921 | if (!migrate_pause_before_switchover()) { | |
2922 | migrate_set_state(&ms->state, MIGRATION_STATUS_ACTIVE, | |
2923 | MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
2924 | } | |
1d34e4bf DDAG |
2925 | |
2926 | trace_postcopy_start(); | |
2927 | qemu_mutex_lock_iothread(); | |
2928 | trace_postcopy_start_set_run(); | |
2929 | ||
fb064112 | 2930 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); |
1d34e4bf DDAG |
2931 | global_state_store(); |
2932 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); | |
76b1c7fe KW |
2933 | if (ret < 0) { |
2934 | goto fail; | |
2935 | } | |
1d34e4bf | 2936 | |
0331c8ca DDAG |
2937 | ret = migration_maybe_pause(ms, &cur_state, |
2938 | MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
2939 | if (ret < 0) { | |
2940 | goto fail; | |
2941 | } | |
2942 | ||
76b1c7fe | 2943 | ret = bdrv_inactivate_all(); |
1d34e4bf DDAG |
2944 | if (ret < 0) { |
2945 | goto fail; | |
2946 | } | |
ef8d6488 | 2947 | restart_block = true; |
1d34e4bf | 2948 | |
1c0d249d DDAG |
2949 | /* |
2950 | * Cause any non-postcopiable, but iterative devices to | |
2951 | * send out their final data. | |
2952 | */ | |
a1fbe750 | 2953 | qemu_savevm_state_complete_precopy(ms->to_dst_file, true, false); |
1c0d249d | 2954 | |
1d34e4bf DDAG |
2955 | /* |
2956 | * in Finish migrate and with the io-lock held everything should | |
2957 | * be quiet, but we've potentially still got dirty pages and we | |
2958 | * need to tell the destination to throw any pages it's already received | |
2959 | * that are dirty | |
2960 | */ | |
58110f0a VSO |
2961 | if (migrate_postcopy_ram()) { |
2962 | if (ram_postcopy_send_discard_bitmap(ms)) { | |
2963 | error_report("postcopy send discard bitmap failed"); | |
2964 | goto fail; | |
2965 | } | |
1d34e4bf DDAG |
2966 | } |
2967 | ||
2968 | /* | |
2969 | * send rest of state - note things that are doing postcopy | |
2970 | * will notice we're in POSTCOPY_ACTIVE and not actually | |
2971 | * wrap their state up here | |
2972 | */ | |
7e555c6c DDAG |
2973 | /* 0 max-postcopy-bandwidth means unlimited */ |
2974 | if (!bandwidth) { | |
2975 | qemu_file_set_rate_limit(ms->to_dst_file, INT64_MAX); | |
2976 | } else { | |
2977 | qemu_file_set_rate_limit(ms->to_dst_file, bandwidth / XFER_LIMIT_RATIO); | |
2978 | } | |
58110f0a VSO |
2979 | if (migrate_postcopy_ram()) { |
2980 | /* Ping just for debugging, helps line traces up */ | |
2981 | qemu_savevm_send_ping(ms->to_dst_file, 2); | |
2982 | } | |
1d34e4bf DDAG |
2983 | |
2984 | /* | |
2985 | * While loading the device state we may trigger page transfer | |
2986 | * requests and the fd must be free to process those, and thus | |
2987 | * the destination must read the whole device state off the fd before | |
2988 | * it starts processing it. Unfortunately the ad-hoc migration format | |
2989 | * doesn't allow the destination to know the size to read without fully | |
2990 | * parsing it through each devices load-state code (especially the open | |
2991 | * coded devices that use get/put). | |
2992 | * So we wrap the device state up in a package with a length at the start; | |
2993 | * to do this we use a qemu_buf to hold the whole of the device state. | |
2994 | */ | |
61b67d47 | 2995 | bioc = qio_channel_buffer_new(4096); |
6f01f136 | 2996 | qio_channel_set_name(QIO_CHANNEL(bioc), "migration-postcopy-buffer"); |
61b67d47 DB |
2997 | fb = qemu_fopen_channel_output(QIO_CHANNEL(bioc)); |
2998 | object_unref(OBJECT(bioc)); | |
1d34e4bf | 2999 | |
c76201ab DDAG |
3000 | /* |
3001 | * Make sure the receiver can get incoming pages before we send the rest | |
3002 | * of the state | |
3003 | */ | |
3004 | qemu_savevm_send_postcopy_listen(fb); | |
3005 | ||
a1fbe750 | 3006 | qemu_savevm_state_complete_precopy(fb, false, false); |
58110f0a VSO |
3007 | if (migrate_postcopy_ram()) { |
3008 | qemu_savevm_send_ping(fb, 3); | |
3009 | } | |
1d34e4bf DDAG |
3010 | |
3011 | qemu_savevm_send_postcopy_run(fb); | |
3012 | ||
3013 | /* <><> end of stuff going into the package */ | |
1d34e4bf | 3014 | |
ef8d6488 DDAG |
3015 | /* Last point of recovery; as soon as we send the package the destination |
3016 | * can open devices and potentially start running. | |
3017 | * Lets just check again we've not got any errors. | |
3018 | */ | |
3019 | ret = qemu_file_get_error(ms->to_dst_file); | |
3020 | if (ret) { | |
3021 | error_report("postcopy_start: Migration stream errored (pre package)"); | |
3022 | goto fail_closefb; | |
3023 | } | |
3024 | ||
3025 | restart_block = false; | |
3026 | ||
1d34e4bf | 3027 | /* Now send that blob */ |
61b67d47 | 3028 | if (qemu_savevm_send_packaged(ms->to_dst_file, bioc->data, bioc->usage)) { |
1d34e4bf DDAG |
3029 | goto fail_closefb; |
3030 | } | |
3031 | qemu_fclose(fb); | |
b82fc321 DDAG |
3032 | |
3033 | /* Send a notify to give a chance for anything that needs to happen | |
3034 | * at the transition to postcopy and after the device state; in particular | |
3035 | * spice needs to trigger a transition now | |
3036 | */ | |
3037 | ms->postcopy_after_devices = true; | |
3038 | notifier_list_notify(&migration_state_notifiers, ms); | |
3039 | ||
1d34e4bf DDAG |
3040 | ms->downtime = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) - time_at_stop; |
3041 | ||
3042 | qemu_mutex_unlock_iothread(); | |
3043 | ||
58110f0a VSO |
3044 | if (migrate_postcopy_ram()) { |
3045 | /* | |
3046 | * Although this ping is just for debug, it could potentially be | |
3047 | * used for getting a better measurement of downtime at the source. | |
3048 | */ | |
3049 | qemu_savevm_send_ping(ms->to_dst_file, 4); | |
3050 | } | |
1d34e4bf | 3051 | |
ced1c616 PB |
3052 | if (migrate_release_ram()) { |
3053 | ram_postcopy_migrated_memory_release(ms); | |
3054 | } | |
3055 | ||
89a02a9f | 3056 | ret = qemu_file_get_error(ms->to_dst_file); |
1d34e4bf DDAG |
3057 | if (ret) { |
3058 | error_report("postcopy_start: Migration stream errored"); | |
48781e5b | 3059 | migrate_set_state(&ms->state, MIGRATION_STATUS_POSTCOPY_ACTIVE, |
1d34e4bf DDAG |
3060 | MIGRATION_STATUS_FAILED); |
3061 | } | |
3062 | ||
3063 | return ret; | |
3064 | ||
3065 | fail_closefb: | |
3066 | qemu_fclose(fb); | |
3067 | fail: | |
48781e5b | 3068 | migrate_set_state(&ms->state, MIGRATION_STATUS_POSTCOPY_ACTIVE, |
1d34e4bf | 3069 | MIGRATION_STATUS_FAILED); |
ef8d6488 DDAG |
3070 | if (restart_block) { |
3071 | /* A failure happened early enough that we know the destination hasn't | |
3072 | * accessed block devices, so we're safe to recover. | |
3073 | */ | |
3074 | Error *local_err = NULL; | |
3075 | ||
3076 | bdrv_invalidate_cache_all(&local_err); | |
3077 | if (local_err) { | |
3078 | error_report_err(local_err); | |
3079 | } | |
3080 | } | |
1d34e4bf DDAG |
3081 | qemu_mutex_unlock_iothread(); |
3082 | return -1; | |
3083 | } | |
3084 | ||
e91d8951 DDAG |
3085 | /** |
3086 | * migration_maybe_pause: Pause if required to by | |
3087 | * migrate_pause_before_switchover called with the iothread locked | |
3088 | * Returns: 0 on success | |
3089 | */ | |
0331c8ca DDAG |
3090 | static int migration_maybe_pause(MigrationState *s, |
3091 | int *current_active_state, | |
3092 | int new_state) | |
e91d8951 DDAG |
3093 | { |
3094 | if (!migrate_pause_before_switchover()) { | |
3095 | return 0; | |
3096 | } | |
3097 | ||
3098 | /* Since leaving this state is not atomic with posting the semaphore | |
3099 | * it's possible that someone could have issued multiple migrate_continue | |
3100 | * and the semaphore is incorrectly positive at this point; | |
3101 | * the docs say it's undefined to reinit a semaphore that's already | |
3102 | * init'd, so use timedwait to eat up any existing posts. | |
3103 | */ | |
3104 | while (qemu_sem_timedwait(&s->pause_sem, 1) == 0) { | |
3105 | /* This block intentionally left blank */ | |
3106 | } | |
3107 | ||
8958338b ZF |
3108 | /* |
3109 | * If the migration is cancelled when it is in the completion phase, | |
3110 | * the migration state is set to MIGRATION_STATUS_CANCELLING. | |
3111 | * So we don't need to wait a semaphore, otherwise we would always | |
3112 | * wait for the 'pause_sem' semaphore. | |
3113 | */ | |
3114 | if (s->state != MIGRATION_STATUS_CANCELLING) { | |
3115 | qemu_mutex_unlock_iothread(); | |
3116 | migrate_set_state(&s->state, *current_active_state, | |
3117 | MIGRATION_STATUS_PRE_SWITCHOVER); | |
3118 | qemu_sem_wait(&s->pause_sem); | |
3119 | migrate_set_state(&s->state, MIGRATION_STATUS_PRE_SWITCHOVER, | |
3120 | new_state); | |
3121 | *current_active_state = new_state; | |
3122 | qemu_mutex_lock_iothread(); | |
3123 | } | |
e91d8951 | 3124 | |
0331c8ca | 3125 | return s->state == new_state ? 0 : -EINVAL; |
e91d8951 DDAG |
3126 | } |
3127 | ||
09f6c85e DDAG |
3128 | /** |
3129 | * migration_completion: Used by migration_thread when there's not much left. | |
3130 | * The caller 'breaks' the loop when this returns. | |
3131 | * | |
3132 | * @s: Current migration state | |
09f6c85e | 3133 | */ |
2ad87305 | 3134 | static void migration_completion(MigrationState *s) |
09f6c85e DDAG |
3135 | { |
3136 | int ret; | |
2ad87305 | 3137 | int current_active_state = s->state; |
09f6c85e | 3138 | |
b10ac0c4 DDAG |
3139 | if (s->state == MIGRATION_STATUS_ACTIVE) { |
3140 | qemu_mutex_lock_iothread(); | |
64909f97 | 3141 | s->downtime_start = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
fb064112 | 3142 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); |
7287cbd4 | 3143 | s->vm_was_running = runstate_is_running(); |
b10ac0c4 DDAG |
3144 | ret = global_state_store(); |
3145 | ||
3146 | if (!ret) { | |
a1fbe750 | 3147 | bool inactivate = !migrate_colo_enabled(); |
b10ac0c4 | 3148 | ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE); |
626ff651 | 3149 | trace_migration_completion_vm_stop(ret); |
e91d8951 | 3150 | if (ret >= 0) { |
0331c8ca DDAG |
3151 | ret = migration_maybe_pause(s, ¤t_active_state, |
3152 | MIGRATION_STATUS_DEVICE); | |
e91d8951 | 3153 | } |
f07fa4cb KW |
3154 | if (ret >= 0) { |
3155 | qemu_file_set_rate_limit(s->to_dst_file, INT64_MAX); | |
a1fbe750 FZ |
3156 | ret = qemu_savevm_state_complete_precopy(s->to_dst_file, false, |
3157 | inactivate); | |
f07fa4cb | 3158 | } |
a1fbe750 FZ |
3159 | if (inactivate && ret >= 0) { |
3160 | s->block_inactive = true; | |
b10ac0c4 DDAG |
3161 | } |
3162 | } | |
3163 | qemu_mutex_unlock_iothread(); | |
09f6c85e | 3164 | |
b10ac0c4 DDAG |
3165 | if (ret < 0) { |
3166 | goto fail; | |
09f6c85e | 3167 | } |
b10ac0c4 DDAG |
3168 | } else if (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { |
3169 | trace_migration_completion_postcopy_end(); | |
3170 | ||
68b88468 | 3171 | qemu_mutex_lock_iothread(); |
89a02a9f | 3172 | qemu_savevm_state_complete_postcopy(s->to_dst_file); |
68b88468 EGE |
3173 | qemu_mutex_unlock_iothread(); |
3174 | ||
b10ac0c4 | 3175 | trace_migration_completion_postcopy_end_after_complete(); |
6ba11211 LM |
3176 | } else if (s->state == MIGRATION_STATUS_CANCELLING) { |
3177 | goto fail; | |
09f6c85e | 3178 | } |
09f6c85e | 3179 | |
b10ac0c4 DDAG |
3180 | /* |
3181 | * If rp was opened we must clean up the thread before | |
3182 | * cleaning everything else up (since if there are no failures | |
3183 | * it will wait for the destination to send it's status in | |
3184 | * a SHUT command). | |
b10ac0c4 | 3185 | */ |
53021ea1 | 3186 | if (s->rp_state.rp_thread_created) { |
b10ac0c4 | 3187 | int rp_error; |
0425dc97 | 3188 | trace_migration_return_path_end_before(); |
b10ac0c4 | 3189 | rp_error = await_return_path_close_on_source(s); |
0425dc97 | 3190 | trace_migration_return_path_end_after(rp_error); |
b10ac0c4 | 3191 | if (rp_error) { |
fe904ea8 | 3192 | goto fail_invalidate; |
b10ac0c4 | 3193 | } |
09f6c85e DDAG |
3194 | } |
3195 | ||
89a02a9f | 3196 | if (qemu_file_get_error(s->to_dst_file)) { |
09f6c85e | 3197 | trace_migration_completion_file_err(); |
fe904ea8 | 3198 | goto fail_invalidate; |
09f6c85e DDAG |
3199 | } |
3200 | ||
0b827d5e HZ |
3201 | if (!migrate_colo_enabled()) { |
3202 | migrate_set_state(&s->state, current_active_state, | |
3203 | MIGRATION_STATUS_COMPLETED); | |
3204 | } | |
3205 | ||
09f6c85e DDAG |
3206 | return; |
3207 | ||
fe904ea8 GK |
3208 | fail_invalidate: |
3209 | /* If not doing postcopy, vm_start() will be called: let's regain | |
3210 | * control on images. | |
3211 | */ | |
6039dd5b DDAG |
3212 | if (s->state == MIGRATION_STATUS_ACTIVE || |
3213 | s->state == MIGRATION_STATUS_DEVICE) { | |
fe904ea8 GK |
3214 | Error *local_err = NULL; |
3215 | ||
1d2acc31 | 3216 | qemu_mutex_lock_iothread(); |
fe904ea8 GK |
3217 | bdrv_invalidate_cache_all(&local_err); |
3218 | if (local_err) { | |
3219 | error_report_err(local_err); | |
1d2acc31 HZ |
3220 | } else { |
3221 | s->block_inactive = false; | |
fe904ea8 | 3222 | } |
1d2acc31 | 3223 | qemu_mutex_unlock_iothread(); |
fe904ea8 GK |
3224 | } |
3225 | ||
09f6c85e | 3226 | fail: |
48781e5b HZ |
3227 | migrate_set_state(&s->state, current_active_state, |
3228 | MIGRATION_STATUS_FAILED); | |
09f6c85e DDAG |
3229 | } |
3230 | ||
8518278a AG |
3231 | /** |
3232 | * bg_migration_completion: Used by bg_migration_thread when after all the | |
3233 | * RAM has been saved. The caller 'breaks' the loop when this returns. | |
3234 | * | |
3235 | * @s: Current migration state | |
3236 | */ | |
3237 | static void bg_migration_completion(MigrationState *s) | |
3238 | { | |
3239 | int current_active_state = s->state; | |
3240 | ||
3241 | /* | |
3242 | * Stop tracking RAM writes - un-protect memory, un-register UFFD | |
3243 | * memory ranges, flush kernel wait queues and wake up threads | |
3244 | * waiting for write fault to be resolved. | |
3245 | */ | |
3246 | ram_write_tracking_stop(); | |
3247 | ||
3248 | if (s->state == MIGRATION_STATUS_ACTIVE) { | |
3249 | /* | |
3250 | * By this moment we have RAM content saved into the migration stream. | |
3251 | * The next step is to flush the non-RAM content (device state) | |
3252 | * right after the ram content. The device state has been stored into | |
3253 | * the temporary buffer before RAM saving started. | |
3254 | */ | |
3255 | qemu_put_buffer(s->to_dst_file, s->bioc->data, s->bioc->usage); | |
3256 | qemu_fflush(s->to_dst_file); | |
3257 | } else if (s->state == MIGRATION_STATUS_CANCELLING) { | |
3258 | goto fail; | |
3259 | } | |
3260 | ||
3261 | if (qemu_file_get_error(s->to_dst_file)) { | |
3262 | trace_migration_completion_file_err(); | |
3263 | goto fail; | |
3264 | } | |
3265 | ||
3266 | migrate_set_state(&s->state, current_active_state, | |
3267 | MIGRATION_STATUS_COMPLETED); | |
3268 | return; | |
3269 | ||
3270 | fail: | |
3271 | migrate_set_state(&s->state, current_active_state, | |
3272 | MIGRATION_STATUS_FAILED); | |
3273 | } | |
3274 | ||
35a6ed4f HZ |
3275 | bool migrate_colo_enabled(void) |
3276 | { | |
3277 | MigrationState *s = migrate_get_current(); | |
3278 | return s->enabled_capabilities[MIGRATION_CAPABILITY_X_COLO]; | |
3279 | } | |
3280 | ||
b23c2ade PX |
3281 | typedef enum MigThrError { |
3282 | /* No error detected */ | |
3283 | MIG_THR_ERR_NONE = 0, | |
3284 | /* Detected error, but resumed successfully */ | |
3285 | MIG_THR_ERR_RECOVERED = 1, | |
3286 | /* Detected fatal error, need to exit */ | |
3287 | MIG_THR_ERR_FATAL = 2, | |
3288 | } MigThrError; | |
3289 | ||
94190696 PX |
3290 | static int postcopy_resume_handshake(MigrationState *s) |
3291 | { | |
3292 | qemu_savevm_send_postcopy_resume(s->to_dst_file); | |
3293 | ||
3294 | while (s->state == MIGRATION_STATUS_POSTCOPY_RECOVER) { | |
3295 | qemu_sem_wait(&s->rp_state.rp_sem); | |
3296 | } | |
3297 | ||
3298 | if (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE) { | |
3299 | return 0; | |
3300 | } | |
3301 | ||
3302 | return -1; | |
3303 | } | |
3304 | ||
135b87b4 PX |
3305 | /* Return zero if success, or <0 for error */ |
3306 | static int postcopy_do_resume(MigrationState *s) | |
3307 | { | |
d1b8eadb PX |
3308 | int ret; |
3309 | ||
3310 | /* | |
3311 | * Call all the resume_prepare() hooks, so that modules can be | |
3312 | * ready for the migration resume. | |
3313 | */ | |
3314 | ret = qemu_savevm_state_resume_prepare(s); | |
3315 | if (ret) { | |
3316 | error_report("%s: resume_prepare() failure detected: %d", | |
3317 | __func__, ret); | |
3318 | return ret; | |
3319 | } | |
3320 | ||
3321 | /* | |
94190696 PX |
3322 | * Last handshake with destination on the resume (destination will |
3323 | * switch to postcopy-active afterwards) | |
d1b8eadb | 3324 | */ |
94190696 PX |
3325 | ret = postcopy_resume_handshake(s); |
3326 | if (ret) { | |
3327 | error_report("%s: handshake failed: %d", __func__, ret); | |
3328 | return ret; | |
3329 | } | |
d1b8eadb | 3330 | |
135b87b4 PX |
3331 | return 0; |
3332 | } | |
3333 | ||
b23c2ade PX |
3334 | /* |
3335 | * We don't return until we are in a safe state to continue current | |
3336 | * postcopy migration. Returns MIG_THR_ERR_RECOVERED if recovered, or | |
3337 | * MIG_THR_ERR_FATAL if unrecovery failure happened. | |
3338 | */ | |
3339 | static MigThrError postcopy_pause(MigrationState *s) | |
3340 | { | |
3341 | assert(s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE); | |
b23c2ade | 3342 | |
135b87b4 | 3343 | while (true) { |
62df066f PX |
3344 | QEMUFile *file; |
3345 | ||
39675fff PX |
3346 | /* |
3347 | * Current channel is possibly broken. Release it. Note that this is | |
3348 | * guaranteed even without lock because to_dst_file should only be | |
3349 | * modified by the migration thread. That also guarantees that the | |
3350 | * unregister of yank is safe too without the lock. It should be safe | |
3351 | * even to be within the qemu_file_lock, but we didn't do that to avoid | |
3352 | * taking more mutex (yank_lock) within qemu_file_lock. TL;DR: we make | |
3353 | * the qemu_file_lock critical section as small as possible. | |
3354 | */ | |
135b87b4 | 3355 | assert(s->to_dst_file); |
39675fff | 3356 | migration_ioc_unregister_yank_from_file(s->to_dst_file); |
62df066f PX |
3357 | qemu_mutex_lock(&s->qemu_file_lock); |
3358 | file = s->to_dst_file; | |
135b87b4 | 3359 | s->to_dst_file = NULL; |
62df066f PX |
3360 | qemu_mutex_unlock(&s->qemu_file_lock); |
3361 | ||
3362 | qemu_file_shutdown(file); | |
3363 | qemu_fclose(file); | |
b23c2ade | 3364 | |
d246ea50 PX |
3365 | migrate_set_state(&s->state, s->state, |
3366 | MIGRATION_STATUS_POSTCOPY_PAUSED); | |
3367 | ||
135b87b4 PX |
3368 | error_report("Detected IO failure for postcopy. " |
3369 | "Migration paused."); | |
b23c2ade | 3370 | |
135b87b4 PX |
3371 | /* |
3372 | * We wait until things fixed up. Then someone will setup the | |
3373 | * status back for us. | |
3374 | */ | |
3375 | while (s->state == MIGRATION_STATUS_POSTCOPY_PAUSED) { | |
3376 | qemu_sem_wait(&s->postcopy_pause_sem); | |
3377 | } | |
3378 | ||
3379 | if (s->state == MIGRATION_STATUS_POSTCOPY_RECOVER) { | |
3380 | /* Woken up by a recover procedure. Give it a shot */ | |
b23c2ade | 3381 | |
135b87b4 PX |
3382 | /* |
3383 | * Firstly, let's wake up the return path now, with a new | |
3384 | * return path channel. | |
3385 | */ | |
3386 | qemu_sem_post(&s->postcopy_pause_rp_sem); | |
3387 | ||
3388 | /* Do the resume logic */ | |
3389 | if (postcopy_do_resume(s) == 0) { | |
3390 | /* Let's continue! */ | |
3391 | trace_postcopy_pause_continued(); | |
3392 | return MIG_THR_ERR_RECOVERED; | |
3393 | } else { | |
3394 | /* | |
3395 | * Something wrong happened during the recovery, let's | |
3396 | * pause again. Pause is always better than throwing | |
3397 | * data away. | |
3398 | */ | |
3399 | continue; | |
3400 | } | |
3401 | } else { | |
3402 | /* This is not right... Time to quit. */ | |
3403 | return MIG_THR_ERR_FATAL; | |
3404 | } | |
3405 | } | |
b23c2ade PX |
3406 | } |
3407 | ||
3408 | static MigThrError migration_detect_error(MigrationState *s) | |
3409 | { | |
3410 | int ret; | |
c3c5eae6 | 3411 | int state = s->state; |
3d661c8a | 3412 | Error *local_error = NULL; |
c3c5eae6 DDAG |
3413 | |
3414 | if (state == MIGRATION_STATUS_CANCELLING || | |
3415 | state == MIGRATION_STATUS_CANCELLED) { | |
3416 | /* End the migration, but don't set the state to failed */ | |
3417 | return MIG_THR_ERR_FATAL; | |
3418 | } | |
b23c2ade PX |
3419 | |
3420 | /* Try to detect any file errors */ | |
3d661c8a | 3421 | ret = qemu_file_get_error_obj(s->to_dst_file, &local_error); |
b23c2ade PX |
3422 | if (!ret) { |
3423 | /* Everything is fine */ | |
3d661c8a | 3424 | assert(!local_error); |
b23c2ade PX |
3425 | return MIG_THR_ERR_NONE; |
3426 | } | |
3427 | ||
3d661c8a YK |
3428 | if (local_error) { |
3429 | migrate_set_error(s, local_error); | |
3430 | error_free(local_error); | |
3431 | } | |
3432 | ||
c3c5eae6 | 3433 | if (state == MIGRATION_STATUS_POSTCOPY_ACTIVE && ret == -EIO) { |
b23c2ade PX |
3434 | /* |
3435 | * For postcopy, we allow the network to be down for a | |
3436 | * while. After that, it can be continued by a | |
3437 | * recovery phase. | |
3438 | */ | |
3439 | return postcopy_pause(s); | |
3440 | } else { | |
3441 | /* | |
3442 | * For precopy (or postcopy with error outside IO), we fail | |
3443 | * with no time. | |
3444 | */ | |
c3c5eae6 | 3445 | migrate_set_state(&s->state, state, MIGRATION_STATUS_FAILED); |
b23c2ade PX |
3446 | trace_migration_thread_file_err(); |
3447 | ||
3448 | /* Time to stop the migration, now. */ | |
3449 | return MIG_THR_ERR_FATAL; | |
3450 | } | |
3451 | } | |
3452 | ||
268dcd46 | 3453 | /* How many bytes have we transferred since the beginning of the migration */ |
0c8f0efd JQ |
3454 | static uint64_t migration_total_bytes(MigrationState *s) |
3455 | { | |
b9ee2f7d | 3456 | return qemu_ftell(s->to_dst_file) + ram_counters.multifd_bytes; |
0c8f0efd JQ |
3457 | } |
3458 | ||
cf011f08 PX |
3459 | static void migration_calculate_complete(MigrationState *s) |
3460 | { | |
0c8f0efd | 3461 | uint64_t bytes = migration_total_bytes(s); |
cf011f08 | 3462 | int64_t end_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
6cde6fbe | 3463 | int64_t transfer_time; |
cf011f08 PX |
3464 | |
3465 | s->total_time = end_time - s->start_time; | |
3466 | if (!s->downtime) { | |
3467 | /* | |
3468 | * It's still not set, so we are precopy migration. For | |
3469 | * postcopy, downtime is calculated during postcopy_start(). | |
3470 | */ | |
3471 | s->downtime = end_time - s->downtime_start; | |
3472 | } | |
3473 | ||
6cde6fbe JQ |
3474 | transfer_time = s->total_time - s->setup_time; |
3475 | if (transfer_time) { | |
3476 | s->mbps = ((double) bytes * 8.0) / transfer_time / 1000; | |
cf011f08 PX |
3477 | } |
3478 | } | |
3479 | ||
87f3bd87 IR |
3480 | static void update_iteration_initial_status(MigrationState *s) |
3481 | { | |
3482 | /* | |
3483 | * Update these three fields at the same time to avoid mismatch info lead | |
3484 | * wrong speed calculation. | |
3485 | */ | |
3486 | s->iteration_start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); | |
3487 | s->iteration_initial_bytes = migration_total_bytes(s); | |
3488 | s->iteration_initial_pages = ram_get_total_transferred_pages(); | |
3489 | } | |
3490 | ||
b15df1ae PX |
3491 | static void migration_update_counters(MigrationState *s, |
3492 | int64_t current_time) | |
3493 | { | |
aecbfe9c | 3494 | uint64_t transferred, transferred_pages, time_spent; |
0c8f0efd | 3495 | uint64_t current_bytes; /* bytes transferred since the beginning */ |
b15df1ae PX |
3496 | double bandwidth; |
3497 | ||
3498 | if (current_time < s->iteration_start_time + BUFFER_DELAY) { | |
3499 | return; | |
3500 | } | |
3501 | ||
0c8f0efd JQ |
3502 | current_bytes = migration_total_bytes(s); |
3503 | transferred = current_bytes - s->iteration_initial_bytes; | |
b15df1ae PX |
3504 | time_spent = current_time - s->iteration_start_time; |
3505 | bandwidth = (double)transferred / time_spent; | |
0781c1ed | 3506 | s->threshold_size = bandwidth * s->parameters.downtime_limit; |
b15df1ae PX |
3507 | |
3508 | s->mbps = (((double) transferred * 8.0) / | |
3509 | ((double) time_spent / 1000.0)) / 1000.0 / 1000.0; | |
3510 | ||
aecbfe9c XG |
3511 | transferred_pages = ram_get_total_transferred_pages() - |
3512 | s->iteration_initial_pages; | |
3513 | s->pages_per_second = (double) transferred_pages / | |
3514 | (((double) time_spent / 1000.0)); | |
3515 | ||
b15df1ae PX |
3516 | /* |
3517 | * if we haven't sent anything, we don't want to | |
3518 | * recalculate. 10000 is a small enough number for our purposes | |
3519 | */ | |
3520 | if (ram_counters.dirty_pages_rate && transferred > 10000) { | |
650af890 | 3521 | s->expected_downtime = ram_counters.remaining / bandwidth; |
b15df1ae PX |
3522 | } |
3523 | ||
3524 | qemu_file_reset_rate_limit(s->to_dst_file); | |
3525 | ||
87f3bd87 | 3526 | update_iteration_initial_status(s); |
b15df1ae PX |
3527 | |
3528 | trace_migrate_transferred(transferred, time_spent, | |
0781c1ed | 3529 | bandwidth, s->threshold_size); |
b15df1ae PX |
3530 | } |
3531 | ||
2ad87305 PX |
3532 | /* Migration thread iteration status */ |
3533 | typedef enum { | |
3534 | MIG_ITERATE_RESUME, /* Resume current iteration */ | |
3535 | MIG_ITERATE_SKIP, /* Skip current iteration */ | |
3536 | MIG_ITERATE_BREAK, /* Break the loop */ | |
3537 | } MigIterateState; | |
3538 | ||
3539 | /* | |
3540 | * Return true if continue to the next iteration directly, false | |
3541 | * otherwise. | |
3542 | */ | |
3543 | static MigIterateState migration_iteration_run(MigrationState *s) | |
3544 | { | |
47995026 | 3545 | uint64_t pending_size, pend_pre, pend_compat, pend_post; |
2ad87305 PX |
3546 | bool in_postcopy = s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE; |
3547 | ||
47995026 VSO |
3548 | qemu_savevm_state_pending(s->to_dst_file, s->threshold_size, &pend_pre, |
3549 | &pend_compat, &pend_post); | |
3550 | pending_size = pend_pre + pend_compat + pend_post; | |
2ad87305 PX |
3551 | |
3552 | trace_migrate_pending(pending_size, s->threshold_size, | |
47995026 | 3553 | pend_pre, pend_compat, pend_post); |
2ad87305 PX |
3554 | |
3555 | if (pending_size && pending_size >= s->threshold_size) { | |
3556 | /* Still a significant amount to transfer */ | |
52aec709 | 3557 | if (!in_postcopy && pend_pre <= s->threshold_size && |
d73415a3 | 3558 | qatomic_read(&s->start_postcopy)) { |
2ad87305 PX |
3559 | if (postcopy_start(s)) { |
3560 | error_report("%s: postcopy failed to start", __func__); | |
3561 | } | |
3562 | return MIG_ITERATE_SKIP; | |
3563 | } | |
3564 | /* Just another iteration step */ | |
17d9351b | 3565 | qemu_savevm_state_iterate(s->to_dst_file, in_postcopy); |
2ad87305 PX |
3566 | } else { |
3567 | trace_migration_thread_low_pending(pending_size); | |
3568 | migration_completion(s); | |
3569 | return MIG_ITERATE_BREAK; | |
3570 | } | |
3571 | ||
3572 | return MIG_ITERATE_RESUME; | |
3573 | } | |
3574 | ||
199aa6d4 PX |
3575 | static void migration_iteration_finish(MigrationState *s) |
3576 | { | |
3577 | /* If we enabled cpu throttling for auto-converge, turn it off. */ | |
3578 | cpu_throttle_stop(); | |
3579 | ||
3580 | qemu_mutex_lock_iothread(); | |
3581 | switch (s->state) { | |
3582 | case MIGRATION_STATUS_COMPLETED: | |
3583 | migration_calculate_complete(s); | |
3584 | runstate_set(RUN_STATE_POSTMIGRATE); | |
3585 | break; | |
3586 | ||
3587 | case MIGRATION_STATUS_ACTIVE: | |
3588 | /* | |
3589 | * We should really assert here, but since it's during | |
3590 | * migration, let's try to reduce the usage of assertions. | |
3591 | */ | |
3592 | if (!migrate_colo_enabled()) { | |
3593 | error_report("%s: critical error: calling COLO code without " | |
3594 | "COLO enabled", __func__); | |
3595 | } | |
3596 | migrate_start_colo_process(s); | |
3597 | /* | |
3598 | * Fixme: we will run VM in COLO no matter its old running state. | |
3599 | * After exited COLO, we will keep running. | |
3600 | */ | |
3601 | s->vm_was_running = true; | |
3602 | /* Fallthrough */ | |
3603 | case MIGRATION_STATUS_FAILED: | |
3604 | case MIGRATION_STATUS_CANCELLED: | |
57225e5f | 3605 | case MIGRATION_STATUS_CANCELLING: |
199aa6d4 PX |
3606 | if (s->vm_was_running) { |
3607 | vm_start(); | |
3608 | } else { | |
3609 | if (runstate_check(RUN_STATE_FINISH_MIGRATE)) { | |
3610 | runstate_set(RUN_STATE_POSTMIGRATE); | |
3611 | } | |
3612 | } | |
3613 | break; | |
3614 | ||
3615 | default: | |
3616 | /* Should not reach here, but if so, forgive the VM. */ | |
3617 | error_report("%s: Unknown ending state %d", __func__, s->state); | |
3618 | break; | |
3619 | } | |
fd392cfa | 3620 | migrate_fd_cleanup_schedule(s); |
199aa6d4 PX |
3621 | qemu_mutex_unlock_iothread(); |
3622 | } | |
3623 | ||
8518278a AG |
3624 | static void bg_migration_iteration_finish(MigrationState *s) |
3625 | { | |
3626 | qemu_mutex_lock_iothread(); | |
3627 | switch (s->state) { | |
3628 | case MIGRATION_STATUS_COMPLETED: | |
3629 | migration_calculate_complete(s); | |
3630 | break; | |
3631 | ||
3632 | case MIGRATION_STATUS_ACTIVE: | |
3633 | case MIGRATION_STATUS_FAILED: | |
3634 | case MIGRATION_STATUS_CANCELLED: | |
3635 | case MIGRATION_STATUS_CANCELLING: | |
3636 | break; | |
3637 | ||
3638 | default: | |
3639 | /* Should not reach here, but if so, forgive the VM. */ | |
3640 | error_report("%s: Unknown ending state %d", __func__, s->state); | |
3641 | break; | |
3642 | } | |
3643 | ||
3644 | migrate_fd_cleanup_schedule(s); | |
3645 | qemu_mutex_unlock_iothread(); | |
3646 | } | |
3647 | ||
3648 | /* | |
3649 | * Return true if continue to the next iteration directly, false | |
3650 | * otherwise. | |
3651 | */ | |
3652 | static MigIterateState bg_migration_iteration_run(MigrationState *s) | |
3653 | { | |
3654 | int res; | |
3655 | ||
3656 | res = qemu_savevm_state_iterate(s->to_dst_file, false); | |
3657 | if (res > 0) { | |
3658 | bg_migration_completion(s); | |
3659 | return MIG_ITERATE_BREAK; | |
3660 | } | |
3661 | ||
3662 | return MIG_ITERATE_RESUME; | |
3663 | } | |
3664 | ||
ad767bed DDAG |
3665 | void migration_make_urgent_request(void) |
3666 | { | |
3667 | qemu_sem_post(&migrate_get_current()->rate_limit_sem); | |
3668 | } | |
3669 | ||
3670 | void migration_consume_urgent_request(void) | |
3671 | { | |
3672 | qemu_sem_wait(&migrate_get_current()->rate_limit_sem); | |
3673 | } | |
3674 | ||
97e1e067 DDAG |
3675 | /* Returns true if the rate limiting was broken by an urgent request */ |
3676 | bool migration_rate_limit(void) | |
3677 | { | |
3678 | int64_t now = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); | |
3679 | MigrationState *s = migrate_get_current(); | |
3680 | ||
3681 | bool urgent = false; | |
3682 | migration_update_counters(s, now); | |
3683 | if (qemu_file_rate_limit(s->to_dst_file)) { | |
77386127 LS |
3684 | |
3685 | if (qemu_file_get_error(s->to_dst_file)) { | |
3686 | return false; | |
3687 | } | |
97e1e067 DDAG |
3688 | /* |
3689 | * Wait for a delay to do rate limiting OR | |
3690 | * something urgent to post the semaphore. | |
3691 | */ | |
3692 | int ms = s->iteration_start_time + BUFFER_DELAY - now; | |
3693 | trace_migration_rate_limit_pre(ms); | |
3694 | if (qemu_sem_timedwait(&s->rate_limit_sem, ms) == 0) { | |
3695 | /* | |
3696 | * We were woken by one or more urgent things but | |
3697 | * the timedwait will have consumed one of them. | |
3698 | * The service routine for the urgent wake will dec | |
3699 | * the semaphore itself for each item it consumes, | |
3700 | * so add this one we just eat back. | |
3701 | */ | |
3702 | qemu_sem_post(&s->rate_limit_sem); | |
3703 | urgent = true; | |
3704 | } | |
3705 | trace_migration_rate_limit_post(urgent); | |
3706 | } | |
3707 | return urgent; | |
3708 | } | |
3709 | ||
fde93d99 LV |
3710 | /* |
3711 | * if failover devices are present, wait they are completely | |
3712 | * unplugged | |
3713 | */ | |
3714 | ||
3715 | static void qemu_savevm_wait_unplug(MigrationState *s, int old_state, | |
3716 | int new_state) | |
3717 | { | |
3718 | if (qemu_savevm_state_guest_unplug_pending()) { | |
3719 | migrate_set_state(&s->state, old_state, MIGRATION_STATUS_WAIT_UNPLUG); | |
3720 | ||
3721 | while (s->state == MIGRATION_STATUS_WAIT_UNPLUG && | |
3722 | qemu_savevm_state_guest_unplug_pending()) { | |
3723 | qemu_sem_timedwait(&s->wait_unplug_sem, 250); | |
3724 | } | |
944bc528 LV |
3725 | if (s->state != MIGRATION_STATUS_WAIT_UNPLUG) { |
3726 | int timeout = 120; /* 30 seconds */ | |
3727 | /* | |
3728 | * migration has been canceled | |
3729 | * but as we have started an unplug we must wait the end | |
3730 | * to be able to plug back the card | |
3731 | */ | |
3732 | while (timeout-- && qemu_savevm_state_guest_unplug_pending()) { | |
3733 | qemu_sem_timedwait(&s->wait_unplug_sem, 250); | |
3734 | } | |
a51dcef0 LV |
3735 | if (qemu_savevm_state_guest_unplug_pending()) { |
3736 | warn_report("migration: partially unplugged device on " | |
3737 | "failure"); | |
3738 | } | |
944bc528 | 3739 | } |
fde93d99 LV |
3740 | |
3741 | migrate_set_state(&s->state, MIGRATION_STATUS_WAIT_UNPLUG, new_state); | |
3742 | } else { | |
3743 | migrate_set_state(&s->state, old_state, new_state); | |
3744 | } | |
3745 | } | |
3746 | ||
70b20477 DDAG |
3747 | /* |
3748 | * Master migration thread on the source VM. | |
3749 | * It drives the migration and pumps the data down the outgoing channel. | |
3750 | */ | |
5f496a1b | 3751 | static void *migration_thread(void *opaque) |
0d82d0e8 | 3752 | { |
9848a404 | 3753 | MigrationState *s = opaque; |
bc72ad67 | 3754 | int64_t setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST); |
b23c2ade | 3755 | MigThrError thr_error; |
ad767bed | 3756 | bool urgent = false; |
76f5933a | 3757 | |
ab28bd23 PB |
3758 | rcu_register_thread(); |
3759 | ||
892ae715 | 3760 | object_ref(OBJECT(s)); |
87f3bd87 | 3761 | update_iteration_initial_status(s); |
b15df1ae | 3762 | |
89a02a9f | 3763 | qemu_savevm_state_header(s->to_dst_file); |
1d34e4bf | 3764 | |
62a02658 PX |
3765 | /* |
3766 | * If we opened the return path, we need to make sure dst has it | |
3767 | * opened as well. | |
3768 | */ | |
43044ac0 | 3769 | if (s->rp_state.rp_thread_created) { |
1d34e4bf | 3770 | /* Now tell the dest that it should open its end so it can reply */ |
89a02a9f | 3771 | qemu_savevm_send_open_return_path(s->to_dst_file); |
1d34e4bf DDAG |
3772 | |
3773 | /* And do a ping that will make stuff easier to debug */ | |
89a02a9f | 3774 | qemu_savevm_send_ping(s->to_dst_file, 1); |
0425dc97 | 3775 | } |
1d34e4bf | 3776 | |
58110f0a | 3777 | if (migrate_postcopy()) { |
1d34e4bf DDAG |
3778 | /* |
3779 | * Tell the destination that we *might* want to do postcopy later; | |
3780 | * if the other end can't do postcopy it should fail now, nice and | |
3781 | * early. | |
3782 | */ | |
89a02a9f | 3783 | qemu_savevm_send_postcopy_advise(s->to_dst_file); |
1d34e4bf DDAG |
3784 | } |
3785 | ||
aad555c2 ZC |
3786 | if (migrate_colo_enabled()) { |
3787 | /* Notify migration destination that we enable COLO */ | |
3788 | qemu_savevm_send_colo_enable(s->to_dst_file); | |
3789 | } | |
3790 | ||
9907e842 | 3791 | qemu_savevm_state_setup(s->to_dst_file); |
0d82d0e8 | 3792 | |
fde93d99 LV |
3793 | qemu_savevm_wait_unplug(s, MIGRATION_STATUS_SETUP, |
3794 | MIGRATION_STATUS_ACTIVE); | |
c7e0acd5 | 3795 | |
bc72ad67 | 3796 | s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start; |
29ae8a41 | 3797 | |
9ec055ae DDAG |
3798 | trace_migration_thread_setup_complete(); |
3799 | ||
8f8d528e | 3800 | while (migration_is_active(s)) { |
ad767bed | 3801 | if (urgent || !qemu_file_rate_limit(s->to_dst_file)) { |
2ad87305 PX |
3802 | MigIterateState iter_state = migration_iteration_run(s); |
3803 | if (iter_state == MIG_ITERATE_SKIP) { | |
3804 | continue; | |
3805 | } else if (iter_state == MIG_ITERATE_BREAK) { | |
09f6c85e | 3806 | break; |
c369f40d JQ |
3807 | } |
3808 | } | |
f4410a5d | 3809 | |
b23c2ade PX |
3810 | /* |
3811 | * Try to detect any kind of failures, and see whether we | |
3812 | * should stop the migration now. | |
3813 | */ | |
3814 | thr_error = migration_detect_error(s); | |
3815 | if (thr_error == MIG_THR_ERR_FATAL) { | |
3816 | /* Stop migration */ | |
fd45ee2c | 3817 | break; |
b23c2ade PX |
3818 | } else if (thr_error == MIG_THR_ERR_RECOVERED) { |
3819 | /* | |
3820 | * Just recovered from a e.g. network failure, reset all | |
3821 | * the local variables. This is important to avoid | |
3822 | * breaking transferred_bytes and bandwidth calculation | |
3823 | */ | |
87f3bd87 | 3824 | update_iteration_initial_status(s); |
fd45ee2c | 3825 | } |
b15df1ae | 3826 | |
97e1e067 | 3827 | urgent = migration_rate_limit(); |
a3fa1d78 PB |
3828 | } |
3829 | ||
1d34e4bf | 3830 | trace_migration_thread_after_loop(); |
199aa6d4 | 3831 | migration_iteration_finish(s); |
892ae715 | 3832 | object_unref(OBJECT(s)); |
ab28bd23 | 3833 | rcu_unregister_thread(); |
0d82d0e8 JQ |
3834 | return NULL; |
3835 | } | |
3836 | ||
8518278a AG |
3837 | static void bg_migration_vm_start_bh(void *opaque) |
3838 | { | |
3839 | MigrationState *s = opaque; | |
3840 | ||
3841 | qemu_bh_delete(s->vm_start_bh); | |
3842 | s->vm_start_bh = NULL; | |
3843 | ||
3844 | vm_start(); | |
3845 | s->downtime = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) - s->downtime_start; | |
3846 | } | |
3847 | ||
3848 | /** | |
3849 | * Background snapshot thread, based on live migration code. | |
3850 | * This is an alternative implementation of live migration mechanism | |
3851 | * introduced specifically to support background snapshots. | |
3852 | * | |
3853 | * It takes advantage of userfault_fd write protection mechanism introduced | |
3854 | * in v5.7 kernel. Compared to existing dirty page logging migration much | |
3855 | * lesser stream traffic is produced resulting in smaller snapshot images, | |
3856 | * simply cause of no page duplicates can get into the stream. | |
3857 | * | |
3858 | * Another key point is that generated vmstate stream reflects machine state | |
3859 | * 'frozen' at the beginning of snapshot creation compared to dirty page logging | |
3860 | * mechanism, which effectively results in that saved snapshot is the state of VM | |
3861 | * at the end of the process. | |
3862 | */ | |
3863 | static void *bg_migration_thread(void *opaque) | |
3864 | { | |
3865 | MigrationState *s = opaque; | |
3866 | int64_t setup_start; | |
3867 | MigThrError thr_error; | |
3868 | QEMUFile *fb; | |
3869 | bool early_fail = true; | |
3870 | ||
3871 | rcu_register_thread(); | |
3872 | object_ref(OBJECT(s)); | |
3873 | ||
3874 | qemu_file_set_rate_limit(s->to_dst_file, INT64_MAX); | |
3875 | ||
3876 | setup_start = qemu_clock_get_ms(QEMU_CLOCK_HOST); | |
3877 | /* | |
3878 | * We want to save vmstate for the moment when migration has been | |
3879 | * initiated but also we want to save RAM content while VM is running. | |
3880 | * The RAM content should appear first in the vmstate. So, we first | |
3881 | * stash the non-RAM part of the vmstate to the temporary buffer, | |
3882 | * then write RAM part of the vmstate to the migration stream | |
3883 | * with vCPUs running and, finally, write stashed non-RAM part of | |
3884 | * the vmstate from the buffer to the migration stream. | |
3885 | */ | |
ecb23efe | 3886 | s->bioc = qio_channel_buffer_new(512 * 1024); |
8518278a AG |
3887 | qio_channel_set_name(QIO_CHANNEL(s->bioc), "vmstate-buffer"); |
3888 | fb = qemu_fopen_channel_output(QIO_CHANNEL(s->bioc)); | |
3889 | object_unref(OBJECT(s->bioc)); | |
3890 | ||
3891 | update_iteration_initial_status(s); | |
3892 | ||
eeccb99c AG |
3893 | /* |
3894 | * Prepare for tracking memory writes with UFFD-WP - populate | |
3895 | * RAM pages before protecting. | |
3896 | */ | |
3897 | #ifdef __linux__ | |
3898 | ram_write_tracking_prepare(); | |
3899 | #endif | |
3900 | ||
8518278a AG |
3901 | qemu_savevm_state_header(s->to_dst_file); |
3902 | qemu_savevm_state_setup(s->to_dst_file); | |
3903 | ||
fde93d99 LV |
3904 | qemu_savevm_wait_unplug(s, MIGRATION_STATUS_SETUP, |
3905 | MIGRATION_STATUS_ACTIVE); | |
8518278a | 3906 | |
8518278a AG |
3907 | s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start; |
3908 | ||
3909 | trace_migration_thread_setup_complete(); | |
3910 | s->downtime_start = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); | |
3911 | ||
3912 | qemu_mutex_lock_iothread(); | |
3913 | ||
3914 | /* | |
3915 | * If VM is currently in suspended state, then, to make a valid runstate | |
3916 | * transition in vm_stop_force_state() we need to wakeup it up. | |
3917 | */ | |
3918 | qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); | |
3919 | s->vm_was_running = runstate_is_running(); | |
3920 | ||
3921 | if (global_state_store()) { | |
3922 | goto fail; | |
3923 | } | |
3924 | /* Forcibly stop VM before saving state of vCPUs and devices */ | |
3925 | if (vm_stop_force_state(RUN_STATE_PAUSED)) { | |
3926 | goto fail; | |
3927 | } | |
3928 | /* | |
3929 | * Put vCPUs in sync with shadow context structures, then | |
3930 | * save their state to channel-buffer along with devices. | |
3931 | */ | |
3932 | cpu_synchronize_all_states(); | |
3933 | if (qemu_savevm_state_complete_precopy_non_iterable(fb, false, false)) { | |
3934 | goto fail; | |
3935 | } | |
ecb23efe AG |
3936 | /* |
3937 | * Since we are going to get non-iterable state data directly | |
3938 | * from s->bioc->data, explicit flush is needed here. | |
3939 | */ | |
3940 | qemu_fflush(fb); | |
3941 | ||
8518278a AG |
3942 | /* Now initialize UFFD context and start tracking RAM writes */ |
3943 | if (ram_write_tracking_start()) { | |
3944 | goto fail; | |
3945 | } | |
3946 | early_fail = false; | |
3947 | ||
3948 | /* | |
3949 | * Start VM from BH handler to avoid write-fault lock here. | |
3950 | * UFFD-WP protection for the whole RAM is already enabled so | |
3951 | * calling VM state change notifiers from vm_start() would initiate | |
3952 | * writes to virtio VQs memory which is in write-protected region. | |
3953 | */ | |
3954 | s->vm_start_bh = qemu_bh_new(bg_migration_vm_start_bh, s); | |
3955 | qemu_bh_schedule(s->vm_start_bh); | |
3956 | ||
3957 | qemu_mutex_unlock_iothread(); | |
3958 | ||
3959 | while (migration_is_active(s)) { | |
3960 | MigIterateState iter_state = bg_migration_iteration_run(s); | |
3961 | if (iter_state == MIG_ITERATE_SKIP) { | |
3962 | continue; | |
3963 | } else if (iter_state == MIG_ITERATE_BREAK) { | |
3964 | break; | |
3965 | } | |
3966 | ||
3967 | /* | |
3968 | * Try to detect any kind of failures, and see whether we | |
3969 | * should stop the migration now. | |
3970 | */ | |
3971 | thr_error = migration_detect_error(s); | |
3972 | if (thr_error == MIG_THR_ERR_FATAL) { | |
3973 | /* Stop migration */ | |
3974 | break; | |
3975 | } | |
3976 | ||
3977 | migration_update_counters(s, qemu_clock_get_ms(QEMU_CLOCK_REALTIME)); | |
3978 | } | |
3979 | ||
3980 | trace_migration_thread_after_loop(); | |
3981 | ||
3982 | fail: | |
3983 | if (early_fail) { | |
3984 | migrate_set_state(&s->state, MIGRATION_STATUS_ACTIVE, | |
3985 | MIGRATION_STATUS_FAILED); | |
3986 | qemu_mutex_unlock_iothread(); | |
3987 | } | |
3988 | ||
3989 | bg_migration_iteration_finish(s); | |
3990 | ||
3991 | qemu_fclose(fb); | |
3992 | object_unref(OBJECT(s)); | |
3993 | rcu_unregister_thread(); | |
3994 | ||
3995 | return NULL; | |
3996 | } | |
3997 | ||
cce8040b | 3998 | void migrate_fd_connect(MigrationState *s, Error *error_in) |
0d82d0e8 | 3999 | { |
00f4b572 | 4000 | Error *local_err = NULL; |
d3e35b8f PX |
4001 | int64_t rate_limit; |
4002 | bool resume = s->state == MIGRATION_STATUS_POSTCOPY_PAUSED; | |
4003 | ||
ca7bd082 PX |
4004 | /* |
4005 | * If there's a previous error, free it and prepare for another one. | |
4006 | * Meanwhile if migration completes successfully, there won't have an error | |
4007 | * dumped when calling migrate_fd_cleanup(). | |
4008 | */ | |
4009 | migrate_error_free(s); | |
4010 | ||
2ff30257 | 4011 | s->expected_downtime = s->parameters.downtime_limit; |
9cbc3649 MAL |
4012 | if (resume) { |
4013 | assert(s->cleanup_bh); | |
4014 | } else { | |
4015 | assert(!s->cleanup_bh); | |
4016 | s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup_bh, s); | |
4017 | } | |
cce8040b DDAG |
4018 | if (error_in) { |
4019 | migrate_fd_error(s, error_in); | |
ca30f24d PX |
4020 | if (resume) { |
4021 | /* | |
4022 | * Don't do cleanup for resume if channel is invalid, but only dump | |
4023 | * the error. We wait for another channel connect from the user. | |
4024 | * The error_report still gives HMP user a hint on what failed. | |
4025 | * It's normally done in migrate_fd_cleanup(), but call it here | |
4026 | * explicitly. | |
4027 | */ | |
4028 | error_report_err(error_copy(s->error)); | |
4029 | } else { | |
4030 | migrate_fd_cleanup(s); | |
4031 | } | |
cce8040b DDAG |
4032 | return; |
4033 | } | |
0d82d0e8 | 4034 | |
d3e35b8f PX |
4035 | if (resume) { |
4036 | /* This is a resumed migration */ | |
8504ddec PX |
4037 | rate_limit = s->parameters.max_postcopy_bandwidth / |
4038 | XFER_LIMIT_RATIO; | |
d3e35b8f PX |
4039 | } else { |
4040 | /* This is a fresh new migration */ | |
4041 | rate_limit = s->parameters.max_bandwidth / XFER_LIMIT_RATIO; | |
442773ce | 4042 | |
d3e35b8f PX |
4043 | /* Notify before starting migration thread */ |
4044 | notifier_list_notify(&migration_state_notifiers, s); | |
4045 | } | |
4046 | ||
4047 | qemu_file_set_rate_limit(s->to_dst_file, rate_limit); | |
4048 | qemu_file_set_blocking(s->to_dst_file, true); | |
9287ac27 | 4049 | |
1d34e4bf | 4050 | /* |
c788ada8 PX |
4051 | * Open the return path. For postcopy, it is used exclusively. For |
4052 | * precopy, only if user specified "return-path" capability would | |
4053 | * QEMU uses the return path. | |
1d34e4bf | 4054 | */ |
c788ada8 | 4055 | if (migrate_postcopy_ram() || migrate_use_return_path()) { |
d3e35b8f | 4056 | if (open_return_path_on_source(s, !resume)) { |
1d34e4bf | 4057 | error_report("Unable to open return-path for postcopy"); |
d3e35b8f | 4058 | migrate_set_state(&s->state, s->state, MIGRATION_STATUS_FAILED); |
1d34e4bf DDAG |
4059 | migrate_fd_cleanup(s); |
4060 | return; | |
4061 | } | |
4062 | } | |
4063 | ||
d3e35b8f | 4064 | if (resume) { |
135b87b4 PX |
4065 | /* Wakeup the main migration thread to do the recovery */ |
4066 | migrate_set_state(&s->state, MIGRATION_STATUS_POSTCOPY_PAUSED, | |
4067 | MIGRATION_STATUS_POSTCOPY_RECOVER); | |
4068 | qemu_sem_post(&s->postcopy_pause_sem); | |
d3e35b8f PX |
4069 | return; |
4070 | } | |
4071 | ||
00f4b572 JQ |
4072 | if (multifd_save_setup(&local_err) != 0) { |
4073 | error_report_err(local_err); | |
f986c3d2 JQ |
4074 | migrate_set_state(&s->state, MIGRATION_STATUS_SETUP, |
4075 | MIGRATION_STATUS_FAILED); | |
4076 | migrate_fd_cleanup(s); | |
4077 | return; | |
4078 | } | |
8518278a AG |
4079 | |
4080 | if (migrate_background_snapshot()) { | |
4081 | qemu_thread_create(&s->thread, "bg_snapshot", | |
4082 | bg_migration_thread, s, QEMU_THREAD_JOINABLE); | |
4083 | } else { | |
4084 | qemu_thread_create(&s->thread, "live_migration", | |
4085 | migration_thread, s, QEMU_THREAD_JOINABLE); | |
4086 | } | |
1d34e4bf | 4087 | s->migration_thread_running = true; |
0d82d0e8 | 4088 | } |
093e3c42 | 4089 | |
9d18af93 PX |
4090 | void migration_global_dump(Monitor *mon) |
4091 | { | |
4092 | MigrationState *ms = migrate_get_current(); | |
4093 | ||
6f0f6428 JQ |
4094 | monitor_printf(mon, "globals:\n"); |
4095 | monitor_printf(mon, "store-global-state: %s\n", | |
4096 | ms->store_global_state ? "on" : "off"); | |
4097 | monitor_printf(mon, "only-migratable: %s\n", | |
811f8652 | 4098 | only_migratable ? "on" : "off"); |
6f0f6428 JQ |
4099 | monitor_printf(mon, "send-configuration: %s\n", |
4100 | ms->send_configuration ? "on" : "off"); | |
4101 | monitor_printf(mon, "send-section-footer: %s\n", | |
4102 | ms->send_section_footer ? "on" : "off"); | |
f548222c XG |
4103 | monitor_printf(mon, "decompress-error-check: %s\n", |
4104 | ms->decompress_error_check ? "on" : "off"); | |
002cad6b PX |
4105 | monitor_printf(mon, "clear-bitmap-shift: %u\n", |
4106 | ms->clear_bitmap_shift); | |
9d18af93 PX |
4107 | } |
4108 | ||
20814758 PX |
4109 | #define DEFINE_PROP_MIG_CAP(name, x) \ |
4110 | DEFINE_PROP_BOOL(name, MigrationState, enabled_capabilities[x], false) | |
4111 | ||
5272298c PX |
4112 | static Property migration_properties[] = { |
4113 | DEFINE_PROP_BOOL("store-global-state", MigrationState, | |
4114 | store_global_state, true), | |
71dd4c1a PX |
4115 | DEFINE_PROP_BOOL("send-configuration", MigrationState, |
4116 | send_configuration, true), | |
15c38503 PX |
4117 | DEFINE_PROP_BOOL("send-section-footer", MigrationState, |
4118 | send_section_footer, true), | |
f548222c XG |
4119 | DEFINE_PROP_BOOL("decompress-error-check", MigrationState, |
4120 | decompress_error_check, true), | |
002cad6b PX |
4121 | DEFINE_PROP_UINT8("x-clear-bitmap-shift", MigrationState, |
4122 | clear_bitmap_shift, CLEAR_BITMAP_SHIFT_DEFAULT), | |
89632faf PX |
4123 | |
4124 | /* Migration parameters */ | |
741d4086 | 4125 | DEFINE_PROP_UINT8("x-compress-level", MigrationState, |
89632faf PX |
4126 | parameters.compress_level, |
4127 | DEFAULT_MIGRATE_COMPRESS_LEVEL), | |
741d4086 | 4128 | DEFINE_PROP_UINT8("x-compress-threads", MigrationState, |
89632faf PX |
4129 | parameters.compress_threads, |
4130 | DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT), | |
1d58872a XG |
4131 | DEFINE_PROP_BOOL("x-compress-wait-thread", MigrationState, |
4132 | parameters.compress_wait_thread, true), | |
741d4086 | 4133 | DEFINE_PROP_UINT8("x-decompress-threads", MigrationState, |
89632faf PX |
4134 | parameters.decompress_threads, |
4135 | DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT), | |
dc14a470 KZ |
4136 | DEFINE_PROP_UINT8("x-throttle-trigger-threshold", MigrationState, |
4137 | parameters.throttle_trigger_threshold, | |
4138 | DEFAULT_MIGRATE_THROTTLE_TRIGGER_THRESHOLD), | |
741d4086 | 4139 | DEFINE_PROP_UINT8("x-cpu-throttle-initial", MigrationState, |
89632faf PX |
4140 | parameters.cpu_throttle_initial, |
4141 | DEFAULT_MIGRATE_CPU_THROTTLE_INITIAL), | |
741d4086 | 4142 | DEFINE_PROP_UINT8("x-cpu-throttle-increment", MigrationState, |
89632faf PX |
4143 | parameters.cpu_throttle_increment, |
4144 | DEFAULT_MIGRATE_CPU_THROTTLE_INCREMENT), | |
cbbf8182 KZ |
4145 | DEFINE_PROP_BOOL("x-cpu-throttle-tailslow", MigrationState, |
4146 | parameters.cpu_throttle_tailslow, false), | |
741d4086 | 4147 | DEFINE_PROP_SIZE("x-max-bandwidth", MigrationState, |
89632faf | 4148 | parameters.max_bandwidth, MAX_THROTTLE), |
741d4086 | 4149 | DEFINE_PROP_UINT64("x-downtime-limit", MigrationState, |
89632faf PX |
4150 | parameters.downtime_limit, |
4151 | DEFAULT_MIGRATE_SET_DOWNTIME), | |
741d4086 | 4152 | DEFINE_PROP_UINT32("x-checkpoint-delay", MigrationState, |
89632faf PX |
4153 | parameters.x_checkpoint_delay, |
4154 | DEFAULT_MIGRATE_X_CHECKPOINT_DELAY), | |
cbfd6c95 JQ |
4155 | DEFINE_PROP_UINT8("multifd-channels", MigrationState, |
4156 | parameters.multifd_channels, | |
4075fb1c | 4157 | DEFAULT_MIGRATE_MULTIFD_CHANNELS), |
96eef042 JQ |
4158 | DEFINE_PROP_MULTIFD_COMPRESSION("multifd-compression", MigrationState, |
4159 | parameters.multifd_compression, | |
4160 | DEFAULT_MIGRATE_MULTIFD_COMPRESSION), | |
9004db48 JQ |
4161 | DEFINE_PROP_UINT8("multifd-zlib-level", MigrationState, |
4162 | parameters.multifd_zlib_level, | |
4163 | DEFAULT_MIGRATE_MULTIFD_ZLIB_LEVEL), | |
6a9ad154 JQ |
4164 | DEFINE_PROP_UINT8("multifd-zstd-level", MigrationState, |
4165 | parameters.multifd_zstd_level, | |
4166 | DEFAULT_MIGRATE_MULTIFD_ZSTD_LEVEL), | |
73af8dd8 JQ |
4167 | DEFINE_PROP_SIZE("xbzrle-cache-size", MigrationState, |
4168 | parameters.xbzrle_cache_size, | |
4169 | DEFAULT_MIGRATE_XBZRLE_CACHE_SIZE), | |
7e555c6c DDAG |
4170 | DEFINE_PROP_SIZE("max-postcopy-bandwidth", MigrationState, |
4171 | parameters.max_postcopy_bandwidth, | |
4172 | DEFAULT_MIGRATE_MAX_POSTCOPY_BANDWIDTH), | |
4cbc9c7f LQ |
4173 | DEFINE_PROP_UINT8("max-cpu-throttle", MigrationState, |
4174 | parameters.max_cpu_throttle, | |
4175 | DEFAULT_MIGRATE_MAX_CPU_THROTTLE), | |
ee3d96ba DDAG |
4176 | DEFINE_PROP_SIZE("announce-initial", MigrationState, |
4177 | parameters.announce_initial, | |
4178 | DEFAULT_MIGRATE_ANNOUNCE_INITIAL), | |
4179 | DEFINE_PROP_SIZE("announce-max", MigrationState, | |
4180 | parameters.announce_max, | |
4181 | DEFAULT_MIGRATE_ANNOUNCE_MAX), | |
4182 | DEFINE_PROP_SIZE("announce-rounds", MigrationState, | |
4183 | parameters.announce_rounds, | |
4184 | DEFAULT_MIGRATE_ANNOUNCE_ROUNDS), | |
4185 | DEFINE_PROP_SIZE("announce-step", MigrationState, | |
4186 | parameters.announce_step, | |
4187 | DEFAULT_MIGRATE_ANNOUNCE_STEP), | |
20814758 PX |
4188 | |
4189 | /* Migration capabilities */ | |
4190 | DEFINE_PROP_MIG_CAP("x-xbzrle", MIGRATION_CAPABILITY_XBZRLE), | |
4191 | DEFINE_PROP_MIG_CAP("x-rdma-pin-all", MIGRATION_CAPABILITY_RDMA_PIN_ALL), | |
4192 | DEFINE_PROP_MIG_CAP("x-auto-converge", MIGRATION_CAPABILITY_AUTO_CONVERGE), | |
4193 | DEFINE_PROP_MIG_CAP("x-zero-blocks", MIGRATION_CAPABILITY_ZERO_BLOCKS), | |
4194 | DEFINE_PROP_MIG_CAP("x-compress", MIGRATION_CAPABILITY_COMPRESS), | |
4195 | DEFINE_PROP_MIG_CAP("x-events", MIGRATION_CAPABILITY_EVENTS), | |
4196 | DEFINE_PROP_MIG_CAP("x-postcopy-ram", MIGRATION_CAPABILITY_POSTCOPY_RAM), | |
4197 | DEFINE_PROP_MIG_CAP("x-colo", MIGRATION_CAPABILITY_X_COLO), | |
4198 | DEFINE_PROP_MIG_CAP("x-release-ram", MIGRATION_CAPABILITY_RELEASE_RAM), | |
4199 | DEFINE_PROP_MIG_CAP("x-block", MIGRATION_CAPABILITY_BLOCK), | |
4200 | DEFINE_PROP_MIG_CAP("x-return-path", MIGRATION_CAPABILITY_RETURN_PATH), | |
cbfd6c95 | 4201 | DEFINE_PROP_MIG_CAP("x-multifd", MIGRATION_CAPABILITY_MULTIFD), |
6e8c25b4 AG |
4202 | DEFINE_PROP_MIG_CAP("x-background-snapshot", |
4203 | MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT), | |
20814758 | 4204 | |
5272298c PX |
4205 | DEFINE_PROP_END_OF_LIST(), |
4206 | }; | |
4207 | ||
e5cb7e76 PX |
4208 | static void migration_class_init(ObjectClass *klass, void *data) |
4209 | { | |
4210 | DeviceClass *dc = DEVICE_CLASS(klass); | |
4211 | ||
4212 | dc->user_creatable = false; | |
4f67d30b | 4213 | device_class_set_props(dc, migration_properties); |
e5cb7e76 PX |
4214 | } |
4215 | ||
b91bf5e4 MAL |
4216 | static void migration_instance_finalize(Object *obj) |
4217 | { | |
4218 | MigrationState *ms = MIGRATION_OBJ(obj); | |
4219 | MigrationParameters *params = &ms->parameters; | |
4220 | ||
87db1a7d | 4221 | qemu_mutex_destroy(&ms->error_mutex); |
62df066f | 4222 | qemu_mutex_destroy(&ms->qemu_file_lock); |
b91bf5e4 MAL |
4223 | g_free(params->tls_hostname); |
4224 | g_free(params->tls_creds); | |
c7e0acd5 | 4225 | qemu_sem_destroy(&ms->wait_unplug_sem); |
ad767bed | 4226 | qemu_sem_destroy(&ms->rate_limit_sem); |
e91d8951 | 4227 | qemu_sem_destroy(&ms->pause_sem); |
b23c2ade | 4228 | qemu_sem_destroy(&ms->postcopy_pause_sem); |
14b1742e | 4229 | qemu_sem_destroy(&ms->postcopy_pause_rp_sem); |
edd090c7 | 4230 | qemu_sem_destroy(&ms->rp_state.rp_sem); |
ab105cc1 | 4231 | error_free(ms->error); |
b91bf5e4 MAL |
4232 | } |
4233 | ||
e5cb7e76 PX |
4234 | static void migration_instance_init(Object *obj) |
4235 | { | |
4236 | MigrationState *ms = MIGRATION_OBJ(obj); | |
8b0b29dc | 4237 | MigrationParameters *params = &ms->parameters; |
e5cb7e76 PX |
4238 | |
4239 | ms->state = MIGRATION_STATUS_NONE; | |
e5cb7e76 | 4240 | ms->mbps = -1; |
aecbfe9c | 4241 | ms->pages_per_second = -1; |
e91d8951 | 4242 | qemu_sem_init(&ms->pause_sem, 0); |
87db1a7d | 4243 | qemu_mutex_init(&ms->error_mutex); |
8b0b29dc PX |
4244 | |
4245 | params->tls_hostname = g_strdup(""); | |
4246 | params->tls_creds = g_strdup(""); | |
4247 | ||
4248 | /* Set has_* up only for parameter checks */ | |
4249 | params->has_compress_level = true; | |
4250 | params->has_compress_threads = true; | |
4251 | params->has_decompress_threads = true; | |
dc14a470 | 4252 | params->has_throttle_trigger_threshold = true; |
8b0b29dc PX |
4253 | params->has_cpu_throttle_initial = true; |
4254 | params->has_cpu_throttle_increment = true; | |
cbbf8182 | 4255 | params->has_cpu_throttle_tailslow = true; |
8b0b29dc PX |
4256 | params->has_max_bandwidth = true; |
4257 | params->has_downtime_limit = true; | |
4258 | params->has_x_checkpoint_delay = true; | |
4259 | params->has_block_incremental = true; | |
cbfd6c95 | 4260 | params->has_multifd_channels = true; |
96eef042 | 4261 | params->has_multifd_compression = true; |
9004db48 | 4262 | params->has_multifd_zlib_level = true; |
6a9ad154 | 4263 | params->has_multifd_zstd_level = true; |
73af8dd8 | 4264 | params->has_xbzrle_cache_size = true; |
7e555c6c | 4265 | params->has_max_postcopy_bandwidth = true; |
4cbc9c7f | 4266 | params->has_max_cpu_throttle = true; |
ee3d96ba DDAG |
4267 | params->has_announce_initial = true; |
4268 | params->has_announce_max = true; | |
4269 | params->has_announce_rounds = true; | |
4270 | params->has_announce_step = true; | |
b23c2ade PX |
4271 | |
4272 | qemu_sem_init(&ms->postcopy_pause_sem, 0); | |
14b1742e | 4273 | qemu_sem_init(&ms->postcopy_pause_rp_sem, 0); |
edd090c7 | 4274 | qemu_sem_init(&ms->rp_state.rp_sem, 0); |
ad767bed | 4275 | qemu_sem_init(&ms->rate_limit_sem, 0); |
c7e0acd5 | 4276 | qemu_sem_init(&ms->wait_unplug_sem, 0); |
62df066f | 4277 | qemu_mutex_init(&ms->qemu_file_lock); |
8b0b29dc PX |
4278 | } |
4279 | ||
4280 | /* | |
4281 | * Return true if check pass, false otherwise. Error will be put | |
4282 | * inside errp if provided. | |
4283 | */ | |
4284 | static bool migration_object_check(MigrationState *ms, Error **errp) | |
4285 | { | |
6b19a7d9 PX |
4286 | MigrationCapabilityStatusList *head = NULL; |
4287 | /* Assuming all off */ | |
4288 | bool cap_list[MIGRATION_CAPABILITY__MAX] = { 0 }, ret; | |
4289 | int i; | |
4290 | ||
8b0b29dc PX |
4291 | if (!migrate_params_check(&ms->parameters, errp)) { |
4292 | return false; | |
4293 | } | |
4294 | ||
6b19a7d9 PX |
4295 | for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) { |
4296 | if (ms->enabled_capabilities[i]) { | |
eaedde52 | 4297 | QAPI_LIST_PREPEND(head, migrate_cap_add(i, true)); |
6b19a7d9 PX |
4298 | } |
4299 | } | |
4300 | ||
4301 | ret = migrate_caps_check(cap_list, head, errp); | |
4302 | ||
4303 | /* It works with head == NULL */ | |
4304 | qapi_free_MigrationCapabilityStatusList(head); | |
4305 | ||
4306 | return ret; | |
e5cb7e76 PX |
4307 | } |
4308 | ||
4309 | static const TypeInfo migration_type = { | |
4310 | .name = TYPE_MIGRATION, | |
01f6e14c | 4311 | /* |
c8d3ff38 | 4312 | * NOTE: TYPE_MIGRATION is not really a device, as the object is |
2194abd6 | 4313 | * not created using qdev_new(), it is not attached to the qdev |
c8d3ff38 PX |
4314 | * device tree, and it is never realized. |
4315 | * | |
4316 | * TODO: Make this TYPE_OBJECT once QOM provides something like | |
4317 | * TYPE_DEVICE's "-global" properties. | |
01f6e14c | 4318 | */ |
e5cb7e76 PX |
4319 | .parent = TYPE_DEVICE, |
4320 | .class_init = migration_class_init, | |
4321 | .class_size = sizeof(MigrationClass), | |
4322 | .instance_size = sizeof(MigrationState), | |
4323 | .instance_init = migration_instance_init, | |
b91bf5e4 | 4324 | .instance_finalize = migration_instance_finalize, |
e5cb7e76 PX |
4325 | }; |
4326 | ||
4327 | static void register_migration_types(void) | |
4328 | { | |
4329 | type_register_static(&migration_type); | |
4330 | } | |
4331 | ||
4332 | type_init(register_migration_types); |