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Commit | Line | Data |
---|---|---|
fb40cdcd AD |
1 | From 46fd4bb673a91d40352c95e9d3f62f63b5021053 Mon Sep 17 00:00:00 2001 |
2 | From: Stefan Priebe <s.priebe@profihost.ag> | |
3 | Date: Fri, 29 Nov 2013 22:17:03 +0100 | |
4 | Subject: [PATCH] internal-snapshot-async-qemu1.7.patch | |
5 | ||
6 | --- | |
7 | Makefile.objs | 1 + | |
8 | block.c | 2 +- | |
9 | hmp-commands.hx | 34 ++++ | |
10 | hmp.c | 57 ++++++ | |
11 | hmp.h | 5 + | |
12 | include/block/block.h | 1 + | |
13 | include/sysemu/sysemu.h | 5 +- | |
14 | monitor.c | 7 + | |
15 | qapi-schema.json | 46 +++++ | |
16 | qemu-options.hx | 13 ++ | |
17 | qmp-commands.hx | 31 +++ | |
18 | savevm-async.c | 478 +++++++++++++++++++++++++++++++++++++++++++++++ | |
19 | savevm.c | 10 +- | |
20 | vl.c | 9 + | |
21 | 14 files changed, 692 insertions(+), 7 deletions(-) | |
22 | create mode 100644 savevm-async.c | |
23 | ||
b08067ba DM |
24 | Index: new/Makefile.objs |
25 | =================================================================== | |
24bb7da3 DM |
26 | --- new.orig/Makefile.objs 2014-11-20 09:13:01.000000000 +0100 |
27 | +++ new/Makefile.objs 2014-11-20 09:16:47.000000000 +0100 | |
58117ea6 | 28 | @@ -53,6 +53,7 @@ |
fb40cdcd | 29 | common-obj-y += qemu-char.o #aio.o |
58117ea6 WB |
30 | common-obj-y += page_cache.o |
31 | common-obj-y += qjson.o | |
fb40cdcd | 32 | +common-obj-y += savevm-async.o |
cd983153 | 33 | |
58117ea6 | 34 | common-obj-$(CONFIG_SPICE) += spice-qemu-char.o |
e96de165 | 35 | |
b08067ba DM |
36 | Index: new/block.c |
37 | =================================================================== | |
24bb7da3 DM |
38 | --- new.orig/block.c 2014-11-20 09:13:01.000000000 +0100 |
39 | +++ new/block.c 2014-11-20 09:16:47.000000000 +0100 | |
58117ea6 | 40 | @@ -2202,7 +2202,7 @@ |
432a6eb5 | 41 | bdrv_attach_child(bs_top, bs_new, &child_backing); |
fb40cdcd | 42 | } |
92bf040c | 43 | |
fb40cdcd AD |
44 | -static void bdrv_delete(BlockDriverState *bs) |
45 | +void bdrv_delete(BlockDriverState *bs) | |
46 | { | |
fb40cdcd | 47 | assert(!bs->job); |
24bb7da3 | 48 | assert(bdrv_op_blocker_is_empty(bs)); |
b08067ba DM |
49 | Index: new/hmp-commands.hx |
50 | =================================================================== | |
24bb7da3 DM |
51 | --- new.orig/hmp-commands.hx 2014-11-20 09:13:01.000000000 +0100 |
52 | +++ new/hmp-commands.hx 2014-11-20 09:16:47.000000000 +0100 | |
432a6eb5 WB |
53 | @@ -1809,6 +1809,8 @@ |
54 | show current migration parameters | |
fb40cdcd AD |
55 | @item info migrate_cache_size |
56 | show current migration XBZRLE cache size | |
57 | +@item info savevm | |
58 | +show savevm status | |
59 | @item info balloon | |
60 | show balloon information | |
61 | @item info qtree | |
432a6eb5 | 62 | @@ -1857,3 +1859,35 @@ |
fb40cdcd AD |
63 | STEXI |
64 | @end table | |
65 | ETEXI | |
cd983153 DM |
66 | + |
67 | + { | |
1f416f3a | 68 | + .name = "savevm-start", |
cd983153 | 69 | + .args_type = "statefile:s?", |
fb40cdcd AD |
70 | + .params = "[statefile]", |
71 | + .help = "Prepare for snapshot and halt VM. Save VM state to statefile.", | |
72 | + .mhandler.cmd = hmp_savevm_start, | |
cd983153 DM |
73 | + }, |
74 | + | |
75 | + { | |
76 | + .name = "snapshot-drive", | |
77 | + .args_type = "device:s,name:s", | |
fb40cdcd AD |
78 | + .params = "device name", |
79 | + .help = "Create internal snapshot.", | |
80 | + .mhandler.cmd = hmp_snapshot_drive, | |
cd983153 DM |
81 | + }, |
82 | + | |
83 | + { | |
84 | + .name = "delete-drive-snapshot", | |
85 | + .args_type = "device:s,name:s", | |
fb40cdcd AD |
86 | + .params = "device name", |
87 | + .help = "Delete internal snapshot.", | |
88 | + .mhandler.cmd = hmp_delete_drive_snapshot, | |
cd983153 DM |
89 | + }, |
90 | + | |
91 | + { | |
1f416f3a | 92 | + .name = "savevm-end", |
cd983153 | 93 | + .args_type = "", |
fb40cdcd AD |
94 | + .params = "", |
95 | + .help = "Resume VM after snaphot.", | |
96 | + .mhandler.cmd = hmp_savevm_end, | |
629cf2f4 | 97 | + }, |
b08067ba DM |
98 | Index: new/hmp.c |
99 | =================================================================== | |
24bb7da3 DM |
100 | --- new.orig/hmp.c 2014-11-20 09:13:01.000000000 +0100 |
101 | +++ new/hmp.c 2014-11-20 09:16:47.000000000 +0100 | |
58117ea6 | 102 | @@ -1849,6 +1849,63 @@ |
3fe80761 | 103 | |
24bb7da3 | 104 | qapi_free_MemoryDeviceInfoList(info_list); |
cd983153 DM |
105 | } |
106 | + | |
1f416f3a | 107 | +void hmp_savevm_start(Monitor *mon, const QDict *qdict) |
cd983153 DM |
108 | +{ |
109 | + Error *errp = NULL; | |
110 | + const char *statefile = qdict_get_try_str(qdict, "statefile"); | |
111 | + | |
1f416f3a | 112 | + qmp_savevm_start(statefile != NULL, statefile, &errp); |
cd983153 DM |
113 | + hmp_handle_error(mon, &errp); |
114 | +} | |
115 | + | |
116 | +void hmp_snapshot_drive(Monitor *mon, const QDict *qdict) | |
117 | +{ | |
118 | + Error *errp = NULL; | |
119 | + const char *name = qdict_get_str(qdict, "name"); | |
120 | + const char *device = qdict_get_str(qdict, "device"); | |
121 | + | |
122 | + qmp_snapshot_drive(device, name, &errp); | |
123 | + hmp_handle_error(mon, &errp); | |
124 | +} | |
125 | + | |
126 | +void hmp_delete_drive_snapshot(Monitor *mon, const QDict *qdict) | |
127 | +{ | |
128 | + Error *errp = NULL; | |
129 | + const char *name = qdict_get_str(qdict, "name"); | |
130 | + const char *device = qdict_get_str(qdict, "device"); | |
131 | + | |
132 | + qmp_delete_drive_snapshot(device, name, &errp); | |
133 | + hmp_handle_error(mon, &errp); | |
134 | +} | |
135 | + | |
1f416f3a | 136 | +void hmp_savevm_end(Monitor *mon, const QDict *qdict) |
cd983153 DM |
137 | +{ |
138 | + Error *errp = NULL; | |
139 | + | |
1f416f3a | 140 | + qmp_savevm_end(&errp); |
cd983153 DM |
141 | + hmp_handle_error(mon, &errp); |
142 | +} | |
143 | + | |
92bf040c | 144 | +void hmp_info_savevm(Monitor *mon, const QDict *qdict) |
cd983153 DM |
145 | +{ |
146 | + SaveVMInfo *info; | |
147 | + info = qmp_query_savevm(NULL); | |
148 | + | |
149 | + if (info->has_status) { | |
150 | + monitor_printf(mon, "savevm status: %s\n", info->status); | |
151 | + monitor_printf(mon, "total time: %" PRIu64 " milliseconds\n", | |
152 | + info->total_time); | |
153 | + } else { | |
154 | + monitor_printf(mon, "savevm status: not running\n"); | |
155 | + } | |
156 | + if (info->has_bytes) { | |
157 | + monitor_printf(mon, "Bytes saved: %"PRIu64"\n", info->bytes); | |
158 | + } | |
159 | + if (info->has_error) { | |
160 | + monitor_printf(mon, "Error: %s\n", info->error); | |
161 | + } | |
162 | +} | |
58117ea6 WB |
163 | |
164 | void hmp_qom_list(Monitor *mon, const QDict *qdict) | |
165 | { | |
b08067ba DM |
166 | Index: new/hmp.h |
167 | =================================================================== | |
24bb7da3 DM |
168 | --- new.orig/hmp.h 2014-11-20 09:13:01.000000000 +0100 |
169 | +++ new/hmp.h 2014-11-20 09:16:47.000000000 +0100 | |
fbe817e2 | 170 | @@ -26,6 +26,7 @@ |
92bf040c DM |
171 | void hmp_info_uuid(Monitor *mon, const QDict *qdict); |
172 | void hmp_info_chardev(Monitor *mon, const QDict *qdict); | |
173 | void hmp_info_mice(Monitor *mon, const QDict *qdict); | |
174 | +void hmp_info_savevm(Monitor *mon, const QDict *qdict); | |
175 | void hmp_info_migrate(Monitor *mon, const QDict *qdict); | |
176 | void hmp_info_migrate_capabilities(Monitor *mon, const QDict *qdict); | |
432a6eb5 | 177 | void hmp_info_migrate_parameters(Monitor *mon, const QDict *qdict); |
fbe817e2 | 178 | @@ -85,6 +86,10 @@ |
cd983153 DM |
179 | void hmp_netdev_del(Monitor *mon, const QDict *qdict); |
180 | void hmp_getfd(Monitor *mon, const QDict *qdict); | |
181 | void hmp_closefd(Monitor *mon, const QDict *qdict); | |
1f416f3a | 182 | +void hmp_savevm_start(Monitor *mon, const QDict *qdict); |
cd983153 DM |
183 | +void hmp_snapshot_drive(Monitor *mon, const QDict *qdict); |
184 | +void hmp_delete_drive_snapshot(Monitor *mon, const QDict *qdict); | |
1f416f3a | 185 | +void hmp_savevm_end(Monitor *mon, const QDict *qdict); |
58117ea6 WB |
186 | void hmp_sendkey(Monitor *mon, const QDict *qdict); |
187 | void hmp_screendump(Monitor *mon, const QDict *qdict); | |
e96de165 | 188 | void hmp_nbd_server_start(Monitor *mon, const QDict *qdict); |
b08067ba DM |
189 | Index: new/include/block/block.h |
190 | =================================================================== | |
24bb7da3 DM |
191 | --- new.orig/include/block/block.h 2014-11-20 09:13:01.000000000 +0100 |
192 | +++ new/include/block/block.h 2014-11-20 09:16:47.000000000 +0100 | |
193 | @@ -235,6 +235,7 @@ | |
fb40cdcd | 194 | int bdrv_get_backing_file_depth(BlockDriverState *bs); |
24bb7da3 | 195 | void bdrv_refresh_filename(BlockDriverState *bs); |
fb40cdcd AD |
196 | int bdrv_truncate(BlockDriverState *bs, int64_t offset); |
197 | +void bdrv_delete(BlockDriverState *bs); | |
24bb7da3 | 198 | int64_t bdrv_nb_sectors(BlockDriverState *bs); |
fb40cdcd AD |
199 | int64_t bdrv_getlength(BlockDriverState *bs); |
200 | int64_t bdrv_get_allocated_file_size(BlockDriverState *bs); | |
b08067ba DM |
201 | Index: new/include/sysemu/sysemu.h |
202 | =================================================================== | |
24bb7da3 DM |
203 | --- new.orig/include/sysemu/sysemu.h 2014-11-20 09:13:01.000000000 +0100 |
204 | +++ new/include/sysemu/sysemu.h 2014-11-20 09:16:47.000000000 +0100 | |
432a6eb5 | 205 | @@ -76,17 +76,18 @@ |
fb40cdcd | 206 | |
58117ea6 | 207 | void hmp_savevm(Monitor *mon, const QDict *qdict); |
fb40cdcd AD |
208 | int load_vmstate(const char *name); |
209 | +int load_state_from_blockdev(const char *filename); | |
58117ea6 WB |
210 | void hmp_delvm(Monitor *mon, const QDict *qdict); |
211 | void hmp_info_snapshots(Monitor *mon, const QDict *qdict); | |
fb40cdcd AD |
212 | |
213 | void qemu_announce_self(void); | |
214 | ||
215 | bool qemu_savevm_state_blocked(Error **errp); | |
216 | -void qemu_savevm_state_begin(QEMUFile *f, | |
217 | +int qemu_savevm_state_begin(QEMUFile *f, | |
218 | const MigrationParams *params); | |
432a6eb5 | 219 | void qemu_savevm_state_header(QEMUFile *f); |
fb40cdcd AD |
220 | int qemu_savevm_state_iterate(QEMUFile *f); |
221 | -void qemu_savevm_state_complete(QEMUFile *f); | |
222 | +int qemu_savevm_state_complete(QEMUFile *f); | |
223 | void qemu_savevm_state_cancel(void); | |
224 | uint64_t qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size); | |
225 | int qemu_loadvm_state(QEMUFile *f); | |
b08067ba DM |
226 | Index: new/monitor.c |
227 | =================================================================== | |
24bb7da3 DM |
228 | --- new.orig/monitor.c 2014-11-20 09:13:01.000000000 +0100 |
229 | +++ new/monitor.c 2014-11-20 09:16:47.000000000 +0100 | |
3fe80761 | 230 | @@ -2876,6 +2876,13 @@ |
fb40cdcd AD |
231 | .mhandler.cmd = hmp_info_migrate_cache_size, |
232 | }, | |
233 | { | |
234 | + .name = "savevm", | |
235 | + .args_type = "", | |
236 | + .params = "", | |
237 | + .help = "show savevm status", | |
238 | + .mhandler.cmd = hmp_info_savevm, | |
239 | + }, | |
240 | + { | |
241 | .name = "balloon", | |
242 | .args_type = "", | |
243 | .params = "", | |
b08067ba DM |
244 | Index: new/qapi-schema.json |
245 | =================================================================== | |
24bb7da3 DM |
246 | --- new.orig/qapi-schema.json 2014-11-20 09:13:01.000000000 +0100 |
247 | +++ new/qapi-schema.json 2014-11-20 09:16:47.000000000 +0100 | |
248 | @@ -550,6 +550,42 @@ | |
fb40cdcd AD |
249 | '*downtime': 'int', |
250 | '*setup-time': 'int'} } | |
251 | ||
252 | + | |
253 | +# @SaveVMInfo | |
254 | +# | |
255 | +# Information about current migration process. | |
256 | +# | |
257 | +# @status: #optional string describing the current savevm status. | |
258 | +# This can be 'active', 'completed', 'failed'. | |
259 | +# If this field is not returned, no savevm process | |
260 | +# has been initiated | |
261 | +# | |
262 | +# @error: #optional string containing error message is status is failed. | |
263 | +# | |
264 | +# @total-time: #optional total amount of milliseconds since savevm started. | |
265 | +# If savevm has ended, it returns the total save time | |
266 | +# | |
267 | +# @bytes: #optional total amount of data transfered | |
268 | +# | |
269 | +# Since: 1.3 | |
270 | +## | |
047e4448 | 271 | +{ 'struct': 'SaveVMInfo', |
fb40cdcd AD |
272 | + 'data': {'*status': 'str', '*error': 'str', |
273 | + '*total-time': 'int', '*bytes': 'int'} } | |
274 | + | |
275 | +## | |
276 | +# @query-savevm | |
277 | +# | |
278 | +# Returns information about current savevm process. | |
279 | +# | |
280 | +# Returns: @SaveVMInfo | |
281 | +# | |
282 | +# Since: 1.3 | |
283 | +## | |
284 | +{ 'command': 'query-savevm', 'returns': 'SaveVMInfo' } | |
285 | + | |
286 | +## | |
287 | + | |
288 | ## | |
289 | # @query-migrate | |
290 | # | |
24bb7da3 | 291 | @@ -2649,8 +2685,18 @@ |
fb40cdcd AD |
292 | # |
293 | # Since: 1.2.0 | |
294 | ## | |
295 | + | |
296 | { 'command': 'query-target', 'returns': 'TargetInfo' } | |
297 | ||
298 | +{ 'command': 'savevm-start', 'data': { '*statefile': 'str' } } | |
299 | + | |
300 | +{ 'command': 'snapshot-drive', 'data': { 'device': 'str', 'name': 'str' } } | |
301 | + | |
302 | +{ 'command': 'delete-drive-snapshot', 'data': { 'device': 'str', 'name': 'str' } } | |
303 | + | |
304 | +{ 'command': 'savevm-end' } | |
305 | + | |
306 | + | |
307 | ## | |
308 | # @QKeyCode: | |
309 | # | |
b08067ba DM |
310 | Index: new/qemu-options.hx |
311 | =================================================================== | |
24bb7da3 DM |
312 | --- new.orig/qemu-options.hx 2014-11-20 09:13:01.000000000 +0100 |
313 | +++ new/qemu-options.hx 2014-11-20 09:16:47.000000000 +0100 | |
314 | @@ -2975,6 +2975,19 @@ | |
fb40cdcd | 315 | Start right away with a saved state (@code{loadvm} in monitor) |
cd983153 | 316 | ETEXI |
fb40cdcd AD |
317 | |
318 | +DEF("loadstate", HAS_ARG, QEMU_OPTION_loadstate, \ | |
319 | + "-loadstate file\n" \ | |
320 | + " start right away with a saved state\n", | |
321 | + QEMU_ARCH_ALL) | |
322 | +STEXI | |
323 | +@item -loadstate @var{file} | |
324 | +@findex -loadstate | |
325 | +Start right away with a saved state. This option does not rollback | |
326 | +disk state like @code{loadvm}, so user must make sure that disk | |
327 | +have correct state. @var{file} can be any valid device URL. See the section | |
328 | +for "Device URL Syntax" for more information. | |
329 | +ETEXI | |
330 | + | |
331 | #ifndef _WIN32 | |
332 | DEF("daemonize", 0, QEMU_OPTION_daemonize, \ | |
333 | "-daemonize daemonize QEMU after initializing\n", QEMU_ARCH_ALL) | |
b08067ba DM |
334 | Index: new/qmp-commands.hx |
335 | =================================================================== | |
24bb7da3 DM |
336 | --- new.orig/qmp-commands.hx 2014-11-20 09:13:01.000000000 +0100 |
337 | +++ new/qmp-commands.hx 2014-11-20 09:16:47.000000000 +0100 | |
432a6eb5 | 338 | @@ -4200,6 +4200,36 @@ |
3fe80761 | 339 | <- { "return": {} } |
fb40cdcd AD |
340 | |
341 | EQMP | |
342 | + | |
cd983153 | 343 | + { |
1f416f3a | 344 | + .name = "savevm-start", |
cd983153 | 345 | + .args_type = "statefile:s?", |
fb40cdcd | 346 | + .mhandler.cmd_new = qmp_marshal_input_savevm_start, |
cd983153 DM |
347 | + }, |
348 | + | |
349 | + { | |
350 | + .name = "snapshot-drive", | |
351 | + .args_type = "device:s,name:s", | |
fb40cdcd | 352 | + .mhandler.cmd_new = qmp_marshal_input_snapshot_drive, |
cd983153 DM |
353 | + }, |
354 | + | |
355 | + { | |
356 | + .name = "delete-drive-snapshot", | |
357 | + .args_type = "device:s,name:s", | |
fb40cdcd | 358 | + .mhandler.cmd_new = qmp_marshal_input_delete_drive_snapshot, |
cd983153 DM |
359 | + }, |
360 | + | |
361 | + { | |
1f416f3a | 362 | + .name = "savevm-end", |
cd983153 | 363 | + .args_type = "", |
fb40cdcd AD |
364 | + .mhandler.cmd_new = qmp_marshal_input_savevm_end, |
365 | + }, | |
366 | + | |
367 | + { | |
368 | + .name = "query-savevm", | |
369 | + .args_type = "", | |
370 | + .mhandler.cmd_new = qmp_marshal_input_query_savevm, | |
cd983153 | 371 | + }, |
432a6eb5 WB |
372 | |
373 | { | |
374 | .name = "query-rocker", | |
b08067ba DM |
375 | Index: new/savevm-async.c |
376 | =================================================================== | |
377 | --- /dev/null 1970-01-01 00:00:00.000000000 +0000 | |
24bb7da3 | 378 | +++ new/savevm-async.c 2014-11-20 09:17:48.000000000 +0100 |
3a007690 | 379 | @@ -0,0 +1,515 @@ |
fb40cdcd AD |
380 | +#include "qemu-common.h" |
381 | +#include "qapi/qmp/qerror.h" | |
e647d55d | 382 | +#include "qemu/error-report.h" |
fb40cdcd | 383 | +#include "sysemu/sysemu.h" |
cd983153 | 384 | +#include "qmp-commands.h" |
fb40cdcd AD |
385 | +#include "qemu-options.h" |
386 | +#include "migration/qemu-file.h" | |
387 | +#include "qom/qom-qobject.h" | |
388 | +#include "migration/migration.h" | |
389 | +#include "block/snapshot.h" | |
390 | +#include "block/qapi.h" | |
391 | +#include "block/block.h" | |
392 | +#include "qemu/timer.h" | |
58117ea6 | 393 | +#include "sysemu/block-backend.h" |
cd983153 | 394 | + |
b84aa9c4 | 395 | +/* #define DEBUG_SAVEVM_STATE */ |
cd983153 DM |
396 | + |
397 | +#ifdef DEBUG_SAVEVM_STATE | |
398 | +#define DPRINTF(fmt, ...) \ | |
399 | + do { printf("savevm-async: " fmt, ## __VA_ARGS__); } while (0) | |
400 | +#else | |
401 | +#define DPRINTF(fmt, ...) \ | |
402 | + do { } while (0) | |
403 | +#endif | |
404 | + | |
405 | +enum { | |
406 | + SAVE_STATE_DONE, | |
407 | + SAVE_STATE_ERROR, | |
408 | + SAVE_STATE_ACTIVE, | |
409 | + SAVE_STATE_COMPLETED, | |
23261368 | 410 | + SAVE_STATE_CANCELLED |
cd983153 DM |
411 | +}; |
412 | + | |
fb40cdcd | 413 | + |
cd983153 DM |
414 | +static struct SnapshotState { |
415 | + BlockDriverState *bs; | |
416 | + size_t bs_pos; | |
417 | + int state; | |
418 | + Error *error; | |
fbe817e2 | 419 | + Error *blocker; |
cd983153 DM |
420 | + int saved_vm_running; |
421 | + QEMUFile *file; | |
422 | + int64_t total_time; | |
423 | +} snap_state; | |
424 | + | |
425 | +SaveVMInfo *qmp_query_savevm(Error **errp) | |
426 | +{ | |
427 | + SaveVMInfo *info = g_malloc0(sizeof(*info)); | |
428 | + struct SnapshotState *s = &snap_state; | |
429 | + | |
430 | + if (s->state != SAVE_STATE_DONE) { | |
431 | + info->has_bytes = true; | |
432 | + info->bytes = s->bs_pos; | |
433 | + switch (s->state) { | |
434 | + case SAVE_STATE_ERROR: | |
435 | + info->has_status = true; | |
436 | + info->status = g_strdup("failed"); | |
437 | + info->has_total_time = true; | |
438 | + info->total_time = s->total_time; | |
439 | + if (s->error) { | |
440 | + info->has_error = true; | |
441 | + info->error = g_strdup(error_get_pretty(s->error)); | |
442 | + } | |
443 | + break; | |
444 | + case SAVE_STATE_ACTIVE: | |
445 | + info->has_status = true; | |
446 | + info->status = g_strdup("active"); | |
447 | + info->has_total_time = true; | |
fb40cdcd | 448 | + info->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) |
cd983153 DM |
449 | + - s->total_time; |
450 | + break; | |
451 | + case SAVE_STATE_COMPLETED: | |
452 | + info->has_status = true; | |
453 | + info->status = g_strdup("completed"); | |
454 | + info->has_total_time = true; | |
455 | + info->total_time = s->total_time; | |
456 | + break; | |
457 | + } | |
458 | + } | |
459 | + | |
460 | + return info; | |
461 | +} | |
462 | + | |
463 | +static int save_snapshot_cleanup(void) | |
464 | +{ | |
465 | + int ret = 0; | |
466 | + | |
467 | + DPRINTF("save_snapshot_cleanup\n"); | |
468 | + | |
fb40cdcd | 469 | + snap_state.total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME) - |
cd983153 DM |
470 | + snap_state.total_time; |
471 | + | |
472 | + if (snap_state.file) { | |
473 | + ret = qemu_fclose(snap_state.file); | |
474 | + } | |
475 | + | |
476 | + if (snap_state.bs) { | |
b84aa9c4 DM |
477 | + /* try to truncate, but ignore errors (will fail on block devices). |
478 | + * note: bdrv_read() need whole blocks, so we round up | |
479 | + */ | |
cd983153 DM |
480 | + size_t size = (snap_state.bs_pos + BDRV_SECTOR_SIZE) & BDRV_SECTOR_MASK; |
481 | + bdrv_truncate(snap_state.bs, size); | |
fbe817e2 DM |
482 | + bdrv_op_unblock_all(snap_state.bs, snap_state.blocker); |
483 | + error_free(snap_state.blocker); | |
484 | + snap_state.blocker = NULL; | |
fb40cdcd | 485 | + bdrv_unref(snap_state.bs); |
cd983153 DM |
486 | + snap_state.bs = NULL; |
487 | + } | |
488 | + | |
489 | + return ret; | |
490 | +} | |
491 | + | |
492 | +static void save_snapshot_error(const char *fmt, ...) | |
493 | +{ | |
494 | + va_list ap; | |
495 | + char *msg; | |
496 | + | |
497 | + va_start(ap, fmt); | |
498 | + msg = g_strdup_vprintf(fmt, ap); | |
499 | + va_end(ap); | |
500 | + | |
501 | + DPRINTF("save_snapshot_error: %s\n", msg); | |
502 | + | |
503 | + if (!snap_state.error) { | |
504 | + error_set(&snap_state.error, ERROR_CLASS_GENERIC_ERROR, "%s", msg); | |
505 | + } | |
506 | + | |
507 | + g_free (msg); | |
508 | + | |
509 | + snap_state.state = SAVE_STATE_ERROR; | |
510 | + | |
511 | + save_snapshot_cleanup(); | |
512 | +} | |
513 | + | |
514 | +static void save_snapshot_completed(void) | |
515 | +{ | |
516 | + DPRINTF("save_snapshot_completed\n"); | |
517 | + | |
518 | + if (save_snapshot_cleanup() < 0) { | |
519 | + snap_state.state = SAVE_STATE_ERROR; | |
520 | + } else { | |
521 | + snap_state.state = SAVE_STATE_COMPLETED; | |
522 | + } | |
523 | +} | |
524 | + | |
525 | +static int block_state_close(void *opaque) | |
526 | +{ | |
527 | + snap_state.file = NULL; | |
528 | + return bdrv_flush(snap_state.bs); | |
529 | +} | |
530 | + | |
b84aa9c4 DM |
531 | +static int block_state_put_buffer(void *opaque, const uint8_t *buf, |
532 | + int64_t pos, int size) | |
cd983153 DM |
533 | +{ |
534 | + int ret; | |
535 | + | |
b84aa9c4 DM |
536 | + assert(pos == snap_state.bs_pos); |
537 | + | |
cd983153 DM |
538 | + if ((ret = bdrv_pwrite(snap_state.bs, snap_state.bs_pos, buf, size)) > 0) { |
539 | + snap_state.bs_pos += ret; | |
540 | + } | |
541 | + | |
542 | + return ret; | |
543 | +} | |
544 | + | |
b84aa9c4 | 545 | +static void process_savevm_co(void *opaque) |
cd983153 DM |
546 | +{ |
547 | + int ret; | |
b84aa9c4 DM |
548 | + int64_t maxlen; |
549 | + MigrationParams params = { | |
550 | + .blk = 0, | |
551 | + .shared = 0 | |
552 | + }; | |
cd983153 | 553 | + |
b84aa9c4 | 554 | + snap_state.state = SAVE_STATE_ACTIVE; |
cd983153 | 555 | + |
fb40cdcd | 556 | + qemu_mutex_unlock_iothread(); |
3a007690 | 557 | + qemu_savevm_state_header(snap_state.file); |
b84aa9c4 | 558 | + ret = qemu_savevm_state_begin(snap_state.file, ¶ms); |
fb40cdcd AD |
559 | + qemu_mutex_lock_iothread(); |
560 | + | |
b84aa9c4 DM |
561 | + if (ret < 0) { |
562 | + save_snapshot_error("qemu_savevm_state_begin failed"); | |
cd983153 DM |
563 | + return; |
564 | + } | |
565 | + | |
b84aa9c4 | 566 | + while (snap_state.state == SAVE_STATE_ACTIVE) { |
92bf040c DM |
567 | + uint64_t pending_size; |
568 | + | |
569 | + pending_size = qemu_savevm_state_pending(snap_state.file, 0); | |
570 | + | |
571 | + if (pending_size) { | |
572 | + ret = qemu_savevm_state_iterate(snap_state.file); | |
573 | + if (ret < 0) { | |
574 | + save_snapshot_error("qemu_savevm_state_iterate error %d", ret); | |
575 | + break; | |
576 | + } | |
577 | + DPRINTF("savevm inerate pending size %lu ret %d\n", pending_size, ret); | |
578 | + } else { | |
579 | + DPRINTF("done iterating\n"); | |
b84aa9c4 DM |
580 | + if (runstate_is_running()) { |
581 | + vm_stop(RUN_STATE_SAVE_VM); | |
582 | + } | |
583 | + DPRINTF("savevm inerate finished\n"); | |
fb40cdcd AD |
584 | + qemu_savevm_state_complete(snap_state.file); |
585 | + DPRINTF("save complete\n"); | |
586 | + save_snapshot_completed(); | |
587 | + break; | |
92bf040c DM |
588 | + } |
589 | + | |
590 | + /* stop the VM if we get to the end of available space, | |
591 | + * or if pending_size is just a few MB | |
592 | + */ | |
593 | + maxlen = bdrv_getlength(snap_state.bs) - 30*1024*1024; | |
594 | + if ((pending_size < 100000) || | |
595 | + ((snap_state.bs_pos + pending_size) >= maxlen)) { | |
596 | + if (runstate_is_running()) { | |
597 | + vm_stop(RUN_STATE_SAVE_VM); | |
b84aa9c4 DM |
598 | + } |
599 | + } | |
cd983153 | 600 | + } |
23261368 AD |
601 | + |
602 | + if(snap_state.state == SAVE_STATE_CANCELLED) { | |
603 | + save_snapshot_completed(); | |
604 | + Error *errp = NULL; | |
605 | + qmp_savevm_end(&errp); | |
606 | + } | |
607 | + | |
cd983153 DM |
608 | +} |
609 | + | |
b84aa9c4 DM |
610 | +static const QEMUFileOps block_file_ops = { |
611 | + .put_buffer = block_state_put_buffer, | |
612 | + .close = block_state_close, | |
613 | +}; | |
614 | + | |
cd983153 | 615 | + |
1f416f3a | 616 | +void qmp_savevm_start(bool has_statefile, const char *statefile, Error **errp) |
cd983153 DM |
617 | +{ |
618 | + BlockDriver *drv = NULL; | |
fb40cdcd AD |
619 | + Error *local_err = NULL; |
620 | + | |
cd983153 | 621 | + int bdrv_oflags = BDRV_O_CACHE_WB | BDRV_O_RDWR; |
cd983153 DM |
622 | + int ret; |
623 | + | |
624 | + if (snap_state.state != SAVE_STATE_DONE) { | |
625 | + error_set(errp, ERROR_CLASS_GENERIC_ERROR, | |
626 | + "VM snapshot already started\n"); | |
627 | + return; | |
628 | + } | |
629 | + | |
630 | + /* initialize snapshot info */ | |
631 | + snap_state.saved_vm_running = runstate_is_running(); | |
632 | + snap_state.bs_pos = 0; | |
fb40cdcd | 633 | + snap_state.total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); |
fbe817e2 | 634 | + snap_state.blocker = NULL; |
cd983153 DM |
635 | + |
636 | + if (snap_state.error) { | |
637 | + error_free(snap_state.error); | |
638 | + snap_state.error = NULL; | |
639 | + } | |
640 | + | |
cd983153 | 641 | + if (!has_statefile) { |
b84aa9c4 | 642 | + vm_stop(RUN_STATE_SAVE_VM); |
cd983153 DM |
643 | + snap_state.state = SAVE_STATE_COMPLETED; |
644 | + return; | |
645 | + } | |
646 | + | |
647 | + if (qemu_savevm_state_blocked(errp)) { | |
648 | + return; | |
649 | + } | |
650 | + | |
651 | + /* Open the image */ | |
24bb7da3 DM |
652 | + snap_state.bs = bdrv_new(); |
653 | + | |
62d638ff | 654 | + ret = bdrv_open(&snap_state.bs, statefile, NULL, NULL, bdrv_oflags, drv, &local_err); |
cd983153 | 655 | + if (ret < 0) { |
fb40cdcd | 656 | + error_set(errp, ERROR_CLASS_GENERIC_ERROR, "failed to open '%s'", statefile); |
cd983153 DM |
657 | + goto restart; |
658 | + } | |
659 | + | |
b84aa9c4 | 660 | + snap_state.file = qemu_fopen_ops(&snap_state, &block_file_ops); |
cd983153 DM |
661 | + |
662 | + if (!snap_state.file) { | |
fb40cdcd | 663 | + error_set(errp, ERROR_CLASS_GENERIC_ERROR, "failed to open '%s'", statefile); |
cd983153 DM |
664 | + goto restart; |
665 | + } | |
666 | + | |
fb40cdcd | 667 | + |
fbe817e2 DM |
668 | + error_setg(&snap_state.blocker, "block device is in use by savevm"); |
669 | + bdrv_op_block_all(snap_state.bs, snap_state.blocker); | |
fb40cdcd | 670 | + |
b84aa9c4 DM |
671 | + Coroutine *co = qemu_coroutine_create(process_savevm_co); |
672 | + qemu_coroutine_enter(co, NULL); | |
cd983153 DM |
673 | + |
674 | + return; | |
675 | + | |
676 | +restart: | |
677 | + | |
678 | + save_snapshot_error("setup failed"); | |
679 | + | |
680 | + if (snap_state.saved_vm_running) { | |
681 | + vm_start(); | |
682 | + } | |
683 | +} | |
684 | + | |
1f416f3a | 685 | +void qmp_savevm_end(Error **errp) |
cd983153 DM |
686 | +{ |
687 | + if (snap_state.state == SAVE_STATE_DONE) { | |
688 | + error_set(errp, ERROR_CLASS_GENERIC_ERROR, | |
689 | + "VM snapshot not started\n"); | |
690 | + return; | |
691 | + } | |
692 | + | |
23261368 AD |
693 | + if (snap_state.state == SAVE_STATE_ACTIVE) { |
694 | + snap_state.state = SAVE_STATE_CANCELLED; | |
695 | + return; | |
696 | + } | |
697 | + | |
cd983153 DM |
698 | + if (snap_state.saved_vm_running) { |
699 | + vm_start(); | |
700 | + } | |
701 | + | |
702 | + snap_state.state = SAVE_STATE_DONE; | |
703 | +} | |
704 | + | |
705 | +void qmp_snapshot_drive(const char *device, const char *name, Error **errp) | |
706 | +{ | |
58117ea6 | 707 | + BlockBackend *blk; |
cd983153 DM |
708 | + BlockDriverState *bs; |
709 | + QEMUSnapshotInfo sn1, *sn = &sn1; | |
710 | + int ret; | |
711 | +#ifdef _WIN32 | |
712 | + struct _timeb tb; | |
713 | +#else | |
714 | + struct timeval tv; | |
715 | +#endif | |
716 | + | |
717 | + if (snap_state.state != SAVE_STATE_COMPLETED) { | |
718 | + error_set(errp, ERROR_CLASS_GENERIC_ERROR, | |
719 | + "VM snapshot not ready/started\n"); | |
720 | + return; | |
721 | + } | |
722 | + | |
58117ea6 WB |
723 | + blk = blk_by_name(device); |
724 | + if (!blk) { | |
e647d55d WB |
725 | + error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, |
726 | + "Device '%s' not found", device); | |
cd983153 DM |
727 | + return; |
728 | + } | |
729 | + | |
58117ea6 | 730 | + bs = blk_bs(blk); |
cd983153 | 731 | + if (!bdrv_is_inserted(bs)) { |
e647d55d | 732 | + error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
cd983153 DM |
733 | + return; |
734 | + } | |
735 | + | |
736 | + if (bdrv_is_read_only(bs)) { | |
e647d55d | 737 | + error_setg(errp, "Node '%s' is read only", device); |
cd983153 DM |
738 | + return; |
739 | + } | |
740 | + | |
741 | + if (!bdrv_can_snapshot(bs)) { | |
e647d55d | 742 | + error_setg(errp, QERR_UNSUPPORTED); |
cd983153 DM |
743 | + return; |
744 | + } | |
745 | + | |
746 | + if (bdrv_snapshot_find(bs, sn, name) >= 0) { | |
747 | + error_set(errp, ERROR_CLASS_GENERIC_ERROR, | |
748 | + "snapshot '%s' already exists", name); | |
749 | + return; | |
750 | + } | |
751 | + | |
752 | + sn = &sn1; | |
753 | + memset(sn, 0, sizeof(*sn)); | |
754 | + | |
755 | +#ifdef _WIN32 | |
756 | + _ftime(&tb); | |
757 | + sn->date_sec = tb.time; | |
758 | + sn->date_nsec = tb.millitm * 1000000; | |
759 | +#else | |
760 | + gettimeofday(&tv, NULL); | |
761 | + sn->date_sec = tv.tv_sec; | |
762 | + sn->date_nsec = tv.tv_usec * 1000; | |
763 | +#endif | |
fb40cdcd | 764 | + sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
cd983153 DM |
765 | + |
766 | + pstrcpy(sn->name, sizeof(sn->name), name); | |
767 | + | |
768 | + sn->vm_state_size = 0; /* do not save state */ | |
769 | + | |
770 | + ret = bdrv_snapshot_create(bs, sn); | |
771 | + if (ret < 0) { | |
772 | + error_set(errp, ERROR_CLASS_GENERIC_ERROR, | |
773 | + "Error while creating snapshot on '%s'\n", device); | |
774 | + return; | |
775 | + } | |
776 | +} | |
777 | + | |
778 | +void qmp_delete_drive_snapshot(const char *device, const char *name, | |
779 | + Error **errp) | |
780 | +{ | |
58117ea6 | 781 | + BlockBackend *blk; |
cd983153 DM |
782 | + BlockDriverState *bs; |
783 | + QEMUSnapshotInfo sn1, *sn = &sn1; | |
fb40cdcd AD |
784 | + Error *local_err = NULL; |
785 | + | |
cd983153 DM |
786 | + int ret; |
787 | + | |
58117ea6 WB |
788 | + blk = blk_by_name(device); |
789 | + if (!blk) { | |
e647d55d WB |
790 | + error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, |
791 | + "Device '%s' not found", device); | |
cd983153 DM |
792 | + return; |
793 | + } | |
58117ea6 WB |
794 | + |
795 | + bs = blk_bs(blk); | |
cd983153 | 796 | + if (bdrv_is_read_only(bs)) { |
e647d55d | 797 | + error_setg(errp, "Node '%s' is read only", device); |
cd983153 DM |
798 | + return; |
799 | + } | |
800 | + | |
801 | + if (!bdrv_can_snapshot(bs)) { | |
e647d55d | 802 | + error_setg(errp, QERR_UNSUPPORTED); |
cd983153 DM |
803 | + return; |
804 | + } | |
805 | + | |
806 | + if (bdrv_snapshot_find(bs, sn, name) < 0) { | |
807 | + /* return success if snapshot does not exists */ | |
808 | + return; | |
809 | + } | |
810 | + | |
fb40cdcd | 811 | + ret = bdrv_snapshot_delete(bs, NULL, name, &local_err); |
cd983153 DM |
812 | + if (ret < 0) { |
813 | + error_set(errp, ERROR_CLASS_GENERIC_ERROR, | |
814 | + "Error while deleting snapshot on '%s'\n", device); | |
815 | + return; | |
816 | + } | |
817 | +} | |
818 | + | |
b84aa9c4 DM |
819 | +static int loadstate_get_buffer(void *opaque, uint8_t *buf, int64_t pos, |
820 | + int size) | |
cd983153 DM |
821 | +{ |
822 | + BlockDriverState *bs = (BlockDriverState *)opaque; | |
823 | + int64_t maxlen = bdrv_getlength(bs); | |
824 | + if (pos > maxlen) { | |
825 | + return -EIO; | |
826 | + } | |
827 | + if ((pos + size) > maxlen) { | |
828 | + size = maxlen - pos - 1; | |
829 | + } | |
830 | + if (size == 0) { | |
831 | + return 0; | |
832 | + } | |
833 | + return bdrv_pread(bs, pos, buf, size); | |
834 | +} | |
835 | + | |
b84aa9c4 DM |
836 | +static const QEMUFileOps loadstate_file_ops = { |
837 | + .get_buffer = loadstate_get_buffer, | |
838 | +}; | |
839 | + | |
cd983153 DM |
840 | +int load_state_from_blockdev(const char *filename) |
841 | +{ | |
842 | + BlockDriverState *bs = NULL; | |
843 | + BlockDriver *drv = NULL; | |
fb40cdcd | 844 | + Error *local_err = NULL; |
fbe817e2 | 845 | + Error *blocker = NULL; |
fb40cdcd | 846 | + |
cd983153 | 847 | + QEMUFile *f; |
3a007690 WB |
848 | + int ret; |
849 | + | |
850 | + ret = global_state_store(); | |
851 | + if (ret) { | |
852 | + error_report("Error saving global state"); | |
853 | + goto the_end; | |
854 | + } | |
cd983153 | 855 | + |
24bb7da3 | 856 | + bs = bdrv_new(); |
c1de5992 | 857 | + ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_CACHE_WB, drv, &local_err); |
fbe817e2 DM |
858 | + error_setg(&blocker, "block device is in use by load state"); |
859 | + bdrv_op_block_all(bs, blocker); | |
fb40cdcd | 860 | + |
cd983153 DM |
861 | + if (ret < 0) { |
862 | + error_report("Could not open VM state file"); | |
863 | + goto the_end; | |
864 | + } | |
865 | + | |
866 | + /* restore the VM state */ | |
b84aa9c4 | 867 | + f = qemu_fopen_ops(bs, &loadstate_file_ops); |
cd983153 DM |
868 | + if (!f) { |
869 | + error_report("Could not open VM state file"); | |
870 | + ret = -EINVAL; | |
871 | + goto the_end; | |
872 | + } | |
873 | + | |
874 | + qemu_system_reset(VMRESET_SILENT); | |
3a007690 | 875 | + migration_incoming_state_new(f); |
cd983153 DM |
876 | + ret = qemu_loadvm_state(f); |
877 | + | |
878 | + qemu_fclose(f); | |
3a007690 | 879 | + migration_incoming_state_destroy(); |
cd983153 DM |
880 | + if (ret < 0) { |
881 | + error_report("Error %d while loading VM state", ret); | |
882 | + goto the_end; | |
883 | + } | |
884 | + | |
885 | + ret = 0; | |
886 | + | |
887 | + the_end: | |
888 | + if (bs) { | |
fbe817e2 DM |
889 | + bdrv_op_unblock_all(bs, blocker); |
890 | + error_free(blocker); | |
fb40cdcd | 891 | + bdrv_unref(bs); |
cd983153 DM |
892 | + } |
893 | + return ret; | |
894 | +} | |
b08067ba DM |
895 | Index: new/savevm.c |
896 | =================================================================== | |
432a6eb5 WB |
897 | --- new.orig/migration/savevm.c 2014-11-20 09:13:01.000000000 +0100 |
898 | +++ new/migration/savevm.c 2014-11-20 09:16:47.000000000 +0100 | |
899 | @@ -718,11 +718,11 @@ | |
900 | qemu_put_be32(f, QEMU_VM_FILE_VERSION); | |
fb40cdcd | 901 | } |
cd983153 | 902 | |
fb40cdcd AD |
903 | -void qemu_savevm_state_begin(QEMUFile *f, |
904 | +int qemu_savevm_state_begin(QEMUFile *f, | |
905 | const MigrationParams *params) | |
906 | { | |
907 | SaveStateEntry *se; | |
908 | - int ret; | |
909 | + int ret = 0; | |
cd983153 | 910 | |
c1de5992 | 911 | trace_savevm_state_begin(); |
432a6eb5 | 912 | QTAILQ_FOREACH(se, &savevm_state.handlers, entry) { |
3fe80761 | 913 | @@ -642,6 +642,7 @@ |
fb40cdcd AD |
914 | break; |
915 | } | |
916 | } | |
917 | + return ret; | |
918 | } | |
919 | ||
920 | /* | |
3fe80761 | 921 | @@ -690,7 +691,7 @@ |
58117ea6 | 922 | return !machine->suppress_vmdesc; |
fb40cdcd AD |
923 | } |
924 | ||
925 | -void qemu_savevm_state_complete(QEMUFile *f) | |
926 | +int qemu_savevm_state_complete(QEMUFile *f) | |
927 | { | |
58117ea6 WB |
928 | QJSON *vmdesc; |
929 | int vmdesc_len; | |
432a6eb5 WB |
930 | @@ -838,7 +839,7 @@ |
931 | save_section_footer(f, se); | |
fb40cdcd AD |
932 | if (ret < 0) { |
933 | qemu_file_set_error(f, ret); | |
934 | - return; | |
935 | + return ret; | |
936 | } | |
937 | } | |
938 | ||
3fe80761 | 939 | @@ -746,6 +747,7 @@ |
58117ea6 | 940 | object_unref(OBJECT(vmdesc)); |
fb40cdcd | 941 | |
fb40cdcd AD |
942 | qemu_fflush(f); |
943 | + return qemu_file_get_error(f); | |
944 | } | |
945 | ||
946 | uint64_t qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size) | |
b08067ba DM |
947 | Index: new/vl.c |
948 | =================================================================== | |
24bb7da3 DM |
949 | --- new.orig/vl.c 2014-11-20 09:13:01.000000000 +0100 |
950 | +++ new/vl.c 2014-11-20 09:16:47.000000000 +0100 | |
951 | @@ -2760,6 +2760,7 @@ | |
cd983153 DM |
952 | int optind; |
953 | const char *optarg; | |
954 | const char *loadvm = NULL; | |
955 | + const char *loadstate = NULL; | |
c1de5992 | 956 | MachineClass *machine_class; |
cd983153 | 957 | const char *cpu_model; |
fbe817e2 | 958 | const char *vga_model = NULL; |
24bb7da3 | 959 | @@ -3457,6 +3458,9 @@ |
58117ea6 WB |
960 | case QEMU_OPTION_loadvm: |
961 | loadvm = optarg; | |
962 | break; | |
cd983153 DM |
963 | + case QEMU_OPTION_loadstate: |
964 | + loadstate = optarg; | |
965 | + break; | |
966 | case QEMU_OPTION_full_screen: | |
967 | full_screen = 1; | |
968 | break; | |
24bb7da3 | 969 | @@ -4428,6 +4432,10 @@ |
cd983153 DM |
970 | if (load_vmstate(loadvm) < 0) { |
971 | autostart = 0; | |
972 | } | |
973 | + } else if (loadstate) { | |
974 | + if (load_state_from_blockdev(loadstate) < 0) { | |
975 | + autostart = 0; | |
976 | + } | |
977 | } | |
978 | ||
24bb7da3 | 979 | qdev_prop_check_globals(); |