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1 | /* | |
2 | * QEMU host block devices | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
5 | * | |
6 | * This work is licensed under the terms of the GNU GPL, version 2 or | |
7 | * later. See the COPYING file in the top-level directory. | |
8 | * | |
9 | * This file incorporates work covered by the following copyright and | |
10 | * permission notice: | |
11 | * | |
12 | * Copyright (c) 2003-2008 Fabrice Bellard | |
13 | * | |
14 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
15 | * of this software and associated documentation files (the "Software"), to deal | |
16 | * in the Software without restriction, including without limitation the rights | |
17 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
18 | * copies of the Software, and to permit persons to whom the Software is | |
19 | * furnished to do so, subject to the following conditions: | |
20 | * | |
21 | * The above copyright notice and this permission notice shall be included in | |
22 | * all copies or substantial portions of the Software. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
25 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
26 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
27 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
28 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
29 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
30 | * THE SOFTWARE. | |
31 | */ | |
32 | ||
33 | #include "qemu/osdep.h" | |
34 | #include "sysemu/block-backend.h" | |
35 | #include "sysemu/blockdev.h" | |
36 | #include "hw/block/block.h" | |
37 | #include "block/blockjob.h" | |
38 | #include "block/dirty-bitmap.h" | |
39 | #include "block/qdict.h" | |
40 | #include "block/throttle-groups.h" | |
41 | #include "monitor/monitor.h" | |
42 | #include "qemu/error-report.h" | |
43 | #include "qemu/option.h" | |
44 | #include "qemu/qemu-print.h" | |
45 | #include "qemu/config-file.h" | |
46 | #include "qapi/qapi-commands-block.h" | |
47 | #include "qapi/qapi-commands-transaction.h" | |
48 | #include "qapi/qapi-visit-block-core.h" | |
49 | #include "qapi/qmp/qdict.h" | |
50 | #include "qapi/qmp/qnum.h" | |
51 | #include "qapi/qmp/qstring.h" | |
52 | #include "qapi/error.h" | |
53 | #include "qapi/qmp/qerror.h" | |
54 | #include "qapi/qmp/qlist.h" | |
55 | #include "qapi/qobject-output-visitor.h" | |
56 | #include "sysemu/sysemu.h" | |
57 | #include "sysemu/iothread.h" | |
58 | #include "block/block_int.h" | |
59 | #include "block/trace.h" | |
60 | #include "sysemu/runstate.h" | |
61 | #include "sysemu/replay.h" | |
62 | #include "qemu/cutils.h" | |
63 | #include "qemu/help_option.h" | |
64 | #include "qemu/main-loop.h" | |
65 | #include "qemu/throttle-options.h" | |
66 | ||
67 | /* Protected by BQL */ | |
68 | QTAILQ_HEAD(, BlockDriverState) monitor_bdrv_states = | |
69 | QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states); | |
70 | ||
71 | void bdrv_set_monitor_owned(BlockDriverState *bs) | |
72 | { | |
73 | GLOBAL_STATE_CODE(); | |
74 | QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list); | |
75 | } | |
76 | ||
77 | static const char *const if_name[IF_COUNT] = { | |
78 | [IF_NONE] = "none", | |
79 | [IF_IDE] = "ide", | |
80 | [IF_SCSI] = "scsi", | |
81 | [IF_FLOPPY] = "floppy", | |
82 | [IF_PFLASH] = "pflash", | |
83 | [IF_MTD] = "mtd", | |
84 | [IF_SD] = "sd", | |
85 | [IF_VIRTIO] = "virtio", | |
86 | [IF_XEN] = "xen", | |
87 | }; | |
88 | ||
89 | static int if_max_devs[IF_COUNT] = { | |
90 | /* | |
91 | * Do not change these numbers! They govern how drive option | |
92 | * index maps to unit and bus. That mapping is ABI. | |
93 | * | |
94 | * All controllers used to implement if=T drives need to support | |
95 | * if_max_devs[T] units, for any T with if_max_devs[T] != 0. | |
96 | * Otherwise, some index values map to "impossible" bus, unit | |
97 | * values. | |
98 | * | |
99 | * For instance, if you change [IF_SCSI] to 255, -drive | |
100 | * if=scsi,index=12 no longer means bus=1,unit=5, but | |
101 | * bus=0,unit=12. With an lsi53c895a controller (7 units max), | |
102 | * the drive can't be set up. Regression. | |
103 | */ | |
104 | [IF_IDE] = 2, | |
105 | [IF_SCSI] = 7, | |
106 | }; | |
107 | ||
108 | /** | |
109 | * Boards may call this to offer board-by-board overrides | |
110 | * of the default, global values. | |
111 | */ | |
112 | void override_max_devs(BlockInterfaceType type, int max_devs) | |
113 | { | |
114 | BlockBackend *blk; | |
115 | DriveInfo *dinfo; | |
116 | ||
117 | GLOBAL_STATE_CODE(); | |
118 | ||
119 | if (max_devs <= 0) { | |
120 | return; | |
121 | } | |
122 | ||
123 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { | |
124 | dinfo = blk_legacy_dinfo(blk); | |
125 | if (dinfo->type == type) { | |
126 | fprintf(stderr, "Cannot override units-per-bus property of" | |
127 | " the %s interface, because a drive of that type has" | |
128 | " already been added.\n", if_name[type]); | |
129 | g_assert_not_reached(); | |
130 | } | |
131 | } | |
132 | ||
133 | if_max_devs[type] = max_devs; | |
134 | } | |
135 | ||
136 | /* | |
137 | * We automatically delete the drive when a device using it gets | |
138 | * unplugged. Questionable feature, but we can't just drop it. | |
139 | * Device models call blockdev_mark_auto_del() to schedule the | |
140 | * automatic deletion, and generic qdev code calls blockdev_auto_del() | |
141 | * when deletion is actually safe. | |
142 | */ | |
143 | void blockdev_mark_auto_del(BlockBackend *blk) | |
144 | { | |
145 | DriveInfo *dinfo = blk_legacy_dinfo(blk); | |
146 | BlockJob *job; | |
147 | ||
148 | GLOBAL_STATE_CODE(); | |
149 | ||
150 | if (!dinfo) { | |
151 | return; | |
152 | } | |
153 | ||
154 | JOB_LOCK_GUARD(); | |
155 | ||
156 | do { | |
157 | job = block_job_next_locked(NULL); | |
158 | while (job && (job->job.cancelled || | |
159 | job->job.deferred_to_main_loop || | |
160 | !block_job_has_bdrv(job, blk_bs(blk)))) | |
161 | { | |
162 | job = block_job_next_locked(job); | |
163 | } | |
164 | if (job) { | |
165 | /* | |
166 | * This drops the job lock temporarily and polls, so we need to | |
167 | * restart processing the list from the start after this. | |
168 | */ | |
169 | job_cancel_locked(&job->job, false); | |
170 | } | |
171 | } while (job); | |
172 | ||
173 | dinfo->auto_del = 1; | |
174 | } | |
175 | ||
176 | void blockdev_auto_del(BlockBackend *blk) | |
177 | { | |
178 | DriveInfo *dinfo = blk_legacy_dinfo(blk); | |
179 | GLOBAL_STATE_CODE(); | |
180 | ||
181 | if (dinfo && dinfo->auto_del) { | |
182 | monitor_remove_blk(blk); | |
183 | blk_unref(blk); | |
184 | } | |
185 | } | |
186 | ||
187 | static int drive_index_to_bus_id(BlockInterfaceType type, int index) | |
188 | { | |
189 | int max_devs = if_max_devs[type]; | |
190 | return max_devs ? index / max_devs : 0; | |
191 | } | |
192 | ||
193 | static int drive_index_to_unit_id(BlockInterfaceType type, int index) | |
194 | { | |
195 | int max_devs = if_max_devs[type]; | |
196 | return max_devs ? index % max_devs : index; | |
197 | } | |
198 | ||
199 | QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, | |
200 | const char *optstr) | |
201 | { | |
202 | QemuOpts *opts; | |
203 | ||
204 | GLOBAL_STATE_CODE(); | |
205 | ||
206 | opts = qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr, false); | |
207 | if (!opts) { | |
208 | return NULL; | |
209 | } | |
210 | if (type != IF_DEFAULT) { | |
211 | qemu_opt_set(opts, "if", if_name[type], &error_abort); | |
212 | } | |
213 | if (index >= 0) { | |
214 | qemu_opt_set_number(opts, "index", index, &error_abort); | |
215 | } | |
216 | if (file) | |
217 | qemu_opt_set(opts, "file", file, &error_abort); | |
218 | return opts; | |
219 | } | |
220 | ||
221 | DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) | |
222 | { | |
223 | BlockBackend *blk; | |
224 | DriveInfo *dinfo; | |
225 | ||
226 | GLOBAL_STATE_CODE(); | |
227 | ||
228 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { | |
229 | dinfo = blk_legacy_dinfo(blk); | |
230 | if (dinfo && dinfo->type == type | |
231 | && dinfo->bus == bus && dinfo->unit == unit) { | |
232 | return dinfo; | |
233 | } | |
234 | } | |
235 | ||
236 | return NULL; | |
237 | } | |
238 | ||
239 | /* | |
240 | * Check board claimed all -drive that are meant to be claimed. | |
241 | * Fatal error if any remain unclaimed. | |
242 | */ | |
243 | void drive_check_orphaned(void) | |
244 | { | |
245 | BlockBackend *blk; | |
246 | DriveInfo *dinfo; | |
247 | Location loc; | |
248 | bool orphans = false; | |
249 | ||
250 | GLOBAL_STATE_CODE(); | |
251 | ||
252 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { | |
253 | dinfo = blk_legacy_dinfo(blk); | |
254 | /* | |
255 | * Ignore default drives, because we create certain default | |
256 | * drives unconditionally, then leave them unclaimed. Not the | |
257 | * users fault. | |
258 | * Ignore IF_VIRTIO or IF_XEN, because it gets desugared into | |
259 | * -device, so we can leave failing to -device. | |
260 | * Ignore IF_NONE, because leaving unclaimed IF_NONE remains | |
261 | * available for device_add is a feature. | |
262 | */ | |
263 | if (dinfo->is_default || dinfo->type == IF_VIRTIO | |
264 | || dinfo->type == IF_XEN || dinfo->type == IF_NONE) { | |
265 | continue; | |
266 | } | |
267 | if (!blk_get_attached_dev(blk)) { | |
268 | loc_push_none(&loc); | |
269 | qemu_opts_loc_restore(dinfo->opts); | |
270 | error_report("machine type does not support" | |
271 | " if=%s,bus=%d,unit=%d", | |
272 | if_name[dinfo->type], dinfo->bus, dinfo->unit); | |
273 | loc_pop(&loc); | |
274 | orphans = true; | |
275 | } | |
276 | } | |
277 | ||
278 | if (orphans) { | |
279 | exit(1); | |
280 | } | |
281 | } | |
282 | ||
283 | DriveInfo *drive_get_by_index(BlockInterfaceType type, int index) | |
284 | { | |
285 | GLOBAL_STATE_CODE(); | |
286 | return drive_get(type, | |
287 | drive_index_to_bus_id(type, index), | |
288 | drive_index_to_unit_id(type, index)); | |
289 | } | |
290 | ||
291 | int drive_get_max_bus(BlockInterfaceType type) | |
292 | { | |
293 | int max_bus; | |
294 | BlockBackend *blk; | |
295 | DriveInfo *dinfo; | |
296 | ||
297 | GLOBAL_STATE_CODE(); | |
298 | ||
299 | max_bus = -1; | |
300 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { | |
301 | dinfo = blk_legacy_dinfo(blk); | |
302 | if (dinfo && dinfo->type == type && dinfo->bus > max_bus) { | |
303 | max_bus = dinfo->bus; | |
304 | } | |
305 | } | |
306 | return max_bus; | |
307 | } | |
308 | ||
309 | static void bdrv_format_print(void *opaque, const char *name) | |
310 | { | |
311 | qemu_printf(" %s", name); | |
312 | } | |
313 | ||
314 | typedef struct { | |
315 | QEMUBH *bh; | |
316 | BlockDriverState *bs; | |
317 | } BDRVPutRefBH; | |
318 | ||
319 | static int parse_block_error_action(const char *buf, bool is_read, Error **errp) | |
320 | { | |
321 | if (!strcmp(buf, "ignore")) { | |
322 | return BLOCKDEV_ON_ERROR_IGNORE; | |
323 | } else if (!is_read && !strcmp(buf, "enospc")) { | |
324 | return BLOCKDEV_ON_ERROR_ENOSPC; | |
325 | } else if (!strcmp(buf, "stop")) { | |
326 | return BLOCKDEV_ON_ERROR_STOP; | |
327 | } else if (!strcmp(buf, "report")) { | |
328 | return BLOCKDEV_ON_ERROR_REPORT; | |
329 | } else { | |
330 | error_setg(errp, "'%s' invalid %s error action", | |
331 | buf, is_read ? "read" : "write"); | |
332 | return -1; | |
333 | } | |
334 | } | |
335 | ||
336 | static bool parse_stats_intervals(BlockAcctStats *stats, QList *intervals, | |
337 | Error **errp) | |
338 | { | |
339 | const QListEntry *entry; | |
340 | for (entry = qlist_first(intervals); entry; entry = qlist_next(entry)) { | |
341 | switch (qobject_type(entry->value)) { | |
342 | ||
343 | case QTYPE_QSTRING: { | |
344 | uint64_t length; | |
345 | const char *str = qstring_get_str(qobject_to(QString, | |
346 | entry->value)); | |
347 | if (parse_uint_full(str, 10, &length) == 0 && | |
348 | length > 0 && length <= UINT_MAX) { | |
349 | block_acct_add_interval(stats, (unsigned) length); | |
350 | } else { | |
351 | error_setg(errp, "Invalid interval length: %s", str); | |
352 | return false; | |
353 | } | |
354 | break; | |
355 | } | |
356 | ||
357 | case QTYPE_QNUM: { | |
358 | int64_t length = qnum_get_int(qobject_to(QNum, entry->value)); | |
359 | ||
360 | if (length > 0 && length <= UINT_MAX) { | |
361 | block_acct_add_interval(stats, (unsigned) length); | |
362 | } else { | |
363 | error_setg(errp, "Invalid interval length: %" PRId64, length); | |
364 | return false; | |
365 | } | |
366 | break; | |
367 | } | |
368 | ||
369 | default: | |
370 | error_setg(errp, "The specification of stats-intervals is invalid"); | |
371 | return false; | |
372 | } | |
373 | } | |
374 | return true; | |
375 | } | |
376 | ||
377 | typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType; | |
378 | ||
379 | /* All parameters but @opts are optional and may be set to NULL. */ | |
380 | static void extract_common_blockdev_options(QemuOpts *opts, int *bdrv_flags, | |
381 | const char **throttling_group, ThrottleConfig *throttle_cfg, | |
382 | BlockdevDetectZeroesOptions *detect_zeroes, Error **errp) | |
383 | { | |
384 | Error *local_error = NULL; | |
385 | const char *aio; | |
386 | ||
387 | if (bdrv_flags) { | |
388 | if (qemu_opt_get_bool(opts, "copy-on-read", false)) { | |
389 | *bdrv_flags |= BDRV_O_COPY_ON_READ; | |
390 | } | |
391 | ||
392 | if ((aio = qemu_opt_get(opts, "aio")) != NULL) { | |
393 | if (bdrv_parse_aio(aio, bdrv_flags) < 0) { | |
394 | error_setg(errp, "invalid aio option"); | |
395 | return; | |
396 | } | |
397 | } | |
398 | } | |
399 | ||
400 | /* disk I/O throttling */ | |
401 | if (throttling_group) { | |
402 | *throttling_group = qemu_opt_get(opts, "throttling.group"); | |
403 | } | |
404 | ||
405 | if (throttle_cfg) { | |
406 | throttle_config_init(throttle_cfg); | |
407 | throttle_cfg->buckets[THROTTLE_BPS_TOTAL].avg = | |
408 | qemu_opt_get_number(opts, "throttling.bps-total", 0); | |
409 | throttle_cfg->buckets[THROTTLE_BPS_READ].avg = | |
410 | qemu_opt_get_number(opts, "throttling.bps-read", 0); | |
411 | throttle_cfg->buckets[THROTTLE_BPS_WRITE].avg = | |
412 | qemu_opt_get_number(opts, "throttling.bps-write", 0); | |
413 | throttle_cfg->buckets[THROTTLE_OPS_TOTAL].avg = | |
414 | qemu_opt_get_number(opts, "throttling.iops-total", 0); | |
415 | throttle_cfg->buckets[THROTTLE_OPS_READ].avg = | |
416 | qemu_opt_get_number(opts, "throttling.iops-read", 0); | |
417 | throttle_cfg->buckets[THROTTLE_OPS_WRITE].avg = | |
418 | qemu_opt_get_number(opts, "throttling.iops-write", 0); | |
419 | ||
420 | throttle_cfg->buckets[THROTTLE_BPS_TOTAL].max = | |
421 | qemu_opt_get_number(opts, "throttling.bps-total-max", 0); | |
422 | throttle_cfg->buckets[THROTTLE_BPS_READ].max = | |
423 | qemu_opt_get_number(opts, "throttling.bps-read-max", 0); | |
424 | throttle_cfg->buckets[THROTTLE_BPS_WRITE].max = | |
425 | qemu_opt_get_number(opts, "throttling.bps-write-max", 0); | |
426 | throttle_cfg->buckets[THROTTLE_OPS_TOTAL].max = | |
427 | qemu_opt_get_number(opts, "throttling.iops-total-max", 0); | |
428 | throttle_cfg->buckets[THROTTLE_OPS_READ].max = | |
429 | qemu_opt_get_number(opts, "throttling.iops-read-max", 0); | |
430 | throttle_cfg->buckets[THROTTLE_OPS_WRITE].max = | |
431 | qemu_opt_get_number(opts, "throttling.iops-write-max", 0); | |
432 | ||
433 | throttle_cfg->buckets[THROTTLE_BPS_TOTAL].burst_length = | |
434 | qemu_opt_get_number(opts, "throttling.bps-total-max-length", 1); | |
435 | throttle_cfg->buckets[THROTTLE_BPS_READ].burst_length = | |
436 | qemu_opt_get_number(opts, "throttling.bps-read-max-length", 1); | |
437 | throttle_cfg->buckets[THROTTLE_BPS_WRITE].burst_length = | |
438 | qemu_opt_get_number(opts, "throttling.bps-write-max-length", 1); | |
439 | throttle_cfg->buckets[THROTTLE_OPS_TOTAL].burst_length = | |
440 | qemu_opt_get_number(opts, "throttling.iops-total-max-length", 1); | |
441 | throttle_cfg->buckets[THROTTLE_OPS_READ].burst_length = | |
442 | qemu_opt_get_number(opts, "throttling.iops-read-max-length", 1); | |
443 | throttle_cfg->buckets[THROTTLE_OPS_WRITE].burst_length = | |
444 | qemu_opt_get_number(opts, "throttling.iops-write-max-length", 1); | |
445 | ||
446 | throttle_cfg->op_size = | |
447 | qemu_opt_get_number(opts, "throttling.iops-size", 0); | |
448 | ||
449 | if (!throttle_is_valid(throttle_cfg, errp)) { | |
450 | return; | |
451 | } | |
452 | } | |
453 | ||
454 | if (detect_zeroes) { | |
455 | *detect_zeroes = | |
456 | qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, | |
457 | qemu_opt_get(opts, "detect-zeroes"), | |
458 | BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, | |
459 | &local_error); | |
460 | if (local_error) { | |
461 | error_propagate(errp, local_error); | |
462 | return; | |
463 | } | |
464 | } | |
465 | } | |
466 | ||
467 | static OnOffAuto account_get_opt(QemuOpts *opts, const char *name) | |
468 | { | |
469 | if (!qemu_opt_find(opts, name)) { | |
470 | return ON_OFF_AUTO_AUTO; | |
471 | } | |
472 | if (qemu_opt_get_bool(opts, name, true)) { | |
473 | return ON_OFF_AUTO_ON; | |
474 | } | |
475 | return ON_OFF_AUTO_OFF; | |
476 | } | |
477 | ||
478 | /* Takes the ownership of bs_opts */ | |
479 | static BlockBackend *blockdev_init(const char *file, QDict *bs_opts, | |
480 | Error **errp) | |
481 | { | |
482 | const char *buf; | |
483 | int bdrv_flags = 0; | |
484 | int on_read_error, on_write_error; | |
485 | OnOffAuto account_invalid, account_failed; | |
486 | bool writethrough, read_only; | |
487 | BlockBackend *blk; | |
488 | BlockDriverState *bs; | |
489 | ThrottleConfig cfg; | |
490 | int snapshot = 0; | |
491 | Error *error = NULL; | |
492 | QemuOpts *opts; | |
493 | QDict *interval_dict = NULL; | |
494 | QList *interval_list = NULL; | |
495 | const char *id; | |
496 | BlockdevDetectZeroesOptions detect_zeroes = | |
497 | BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; | |
498 | const char *throttling_group = NULL; | |
499 | ||
500 | /* Check common options by copying from bs_opts to opts, all other options | |
501 | * stay in bs_opts for processing by bdrv_open(). */ | |
502 | id = qdict_get_try_str(bs_opts, "id"); | |
503 | opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, errp); | |
504 | if (!opts) { | |
505 | goto err_no_opts; | |
506 | } | |
507 | ||
508 | if (!qemu_opts_absorb_qdict(opts, bs_opts, errp)) { | |
509 | goto early_err; | |
510 | } | |
511 | ||
512 | if (id) { | |
513 | qdict_del(bs_opts, "id"); | |
514 | } | |
515 | ||
516 | /* extract parameters */ | |
517 | snapshot = qemu_opt_get_bool(opts, "snapshot", 0); | |
518 | ||
519 | account_invalid = account_get_opt(opts, "stats-account-invalid"); | |
520 | account_failed = account_get_opt(opts, "stats-account-failed"); | |
521 | ||
522 | writethrough = !qemu_opt_get_bool(opts, BDRV_OPT_CACHE_WB, true); | |
523 | ||
524 | id = qemu_opts_id(opts); | |
525 | ||
526 | qdict_extract_subqdict(bs_opts, &interval_dict, "stats-intervals."); | |
527 | qdict_array_split(interval_dict, &interval_list); | |
528 | ||
529 | if (qdict_size(interval_dict) != 0) { | |
530 | error_setg(errp, "Invalid option stats-intervals.%s", | |
531 | qdict_first(interval_dict)->key); | |
532 | goto early_err; | |
533 | } | |
534 | ||
535 | extract_common_blockdev_options(opts, &bdrv_flags, &throttling_group, &cfg, | |
536 | &detect_zeroes, &error); | |
537 | if (error) { | |
538 | error_propagate(errp, error); | |
539 | goto early_err; | |
540 | } | |
541 | ||
542 | if ((buf = qemu_opt_get(opts, "format")) != NULL) { | |
543 | if (is_help_option(buf)) { | |
544 | qemu_printf("Supported formats:"); | |
545 | bdrv_iterate_format(bdrv_format_print, NULL, false); | |
546 | qemu_printf("\nSupported formats (read-only):"); | |
547 | bdrv_iterate_format(bdrv_format_print, NULL, true); | |
548 | qemu_printf("\n"); | |
549 | goto early_err; | |
550 | } | |
551 | ||
552 | if (qdict_haskey(bs_opts, "driver")) { | |
553 | error_setg(errp, "Cannot specify both 'driver' and 'format'"); | |
554 | goto early_err; | |
555 | } | |
556 | qdict_put_str(bs_opts, "driver", buf); | |
557 | } | |
558 | ||
559 | on_write_error = BLOCKDEV_ON_ERROR_ENOSPC; | |
560 | if ((buf = qemu_opt_get(opts, "werror")) != NULL) { | |
561 | on_write_error = parse_block_error_action(buf, 0, &error); | |
562 | if (error) { | |
563 | error_propagate(errp, error); | |
564 | goto early_err; | |
565 | } | |
566 | } | |
567 | ||
568 | on_read_error = BLOCKDEV_ON_ERROR_REPORT; | |
569 | if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { | |
570 | on_read_error = parse_block_error_action(buf, 1, &error); | |
571 | if (error) { | |
572 | error_propagate(errp, error); | |
573 | goto early_err; | |
574 | } | |
575 | } | |
576 | ||
577 | if (snapshot) { | |
578 | bdrv_flags |= BDRV_O_SNAPSHOT; | |
579 | } | |
580 | ||
581 | read_only = qemu_opt_get_bool(opts, BDRV_OPT_READ_ONLY, false); | |
582 | ||
583 | /* init */ | |
584 | if ((!file || !*file) && !qdict_size(bs_opts)) { | |
585 | BlockBackendRootState *blk_rs; | |
586 | ||
587 | blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL); | |
588 | blk_rs = blk_get_root_state(blk); | |
589 | blk_rs->open_flags = bdrv_flags | (read_only ? 0 : BDRV_O_RDWR); | |
590 | blk_rs->detect_zeroes = detect_zeroes; | |
591 | ||
592 | qobject_unref(bs_opts); | |
593 | } else { | |
594 | if (file && !*file) { | |
595 | file = NULL; | |
596 | } | |
597 | ||
598 | /* bdrv_open() defaults to the values in bdrv_flags (for compatibility | |
599 | * with other callers) rather than what we want as the real defaults. | |
600 | * Apply the defaults here instead. */ | |
601 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off"); | |
602 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off"); | |
603 | qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY, | |
604 | read_only ? "on" : "off"); | |
605 | qdict_set_default_str(bs_opts, BDRV_OPT_AUTO_READ_ONLY, "on"); | |
606 | assert((bdrv_flags & BDRV_O_CACHE_MASK) == 0); | |
607 | ||
608 | if (runstate_check(RUN_STATE_INMIGRATE)) { | |
609 | bdrv_flags |= BDRV_O_INACTIVE; | |
610 | } | |
611 | ||
612 | blk = blk_new_open(file, NULL, bs_opts, bdrv_flags, errp); | |
613 | if (!blk) { | |
614 | goto err_no_bs_opts; | |
615 | } | |
616 | bs = blk_bs(blk); | |
617 | ||
618 | bs->detect_zeroes = detect_zeroes; | |
619 | ||
620 | block_acct_setup(blk_get_stats(blk), account_invalid, account_failed); | |
621 | ||
622 | if (!parse_stats_intervals(blk_get_stats(blk), interval_list, errp)) { | |
623 | blk_unref(blk); | |
624 | blk = NULL; | |
625 | goto err_no_bs_opts; | |
626 | } | |
627 | } | |
628 | ||
629 | /* disk I/O throttling */ | |
630 | if (throttle_enabled(&cfg)) { | |
631 | if (!throttling_group) { | |
632 | throttling_group = id; | |
633 | } | |
634 | blk_io_limits_enable(blk, throttling_group); | |
635 | blk_set_io_limits(blk, &cfg); | |
636 | } | |
637 | ||
638 | blk_set_enable_write_cache(blk, !writethrough); | |
639 | blk_set_on_error(blk, on_read_error, on_write_error); | |
640 | ||
641 | if (!monitor_add_blk(blk, id, errp)) { | |
642 | blk_unref(blk); | |
643 | blk = NULL; | |
644 | goto err_no_bs_opts; | |
645 | } | |
646 | ||
647 | err_no_bs_opts: | |
648 | qemu_opts_del(opts); | |
649 | qobject_unref(interval_dict); | |
650 | qobject_unref(interval_list); | |
651 | return blk; | |
652 | ||
653 | early_err: | |
654 | qemu_opts_del(opts); | |
655 | qobject_unref(interval_dict); | |
656 | qobject_unref(interval_list); | |
657 | err_no_opts: | |
658 | qobject_unref(bs_opts); | |
659 | return NULL; | |
660 | } | |
661 | ||
662 | /* Takes the ownership of bs_opts */ | |
663 | BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp) | |
664 | { | |
665 | int bdrv_flags = 0; | |
666 | ||
667 | GLOBAL_STATE_CODE(); | |
668 | /* bdrv_open() defaults to the values in bdrv_flags (for compatibility | |
669 | * with other callers) rather than what we want as the real defaults. | |
670 | * Apply the defaults here instead. */ | |
671 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off"); | |
672 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off"); | |
673 | qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY, "off"); | |
674 | ||
675 | if (runstate_check(RUN_STATE_INMIGRATE)) { | |
676 | bdrv_flags |= BDRV_O_INACTIVE; | |
677 | } | |
678 | ||
679 | return bdrv_open(NULL, NULL, bs_opts, bdrv_flags, errp); | |
680 | } | |
681 | ||
682 | void blockdev_close_all_bdrv_states(void) | |
683 | { | |
684 | BlockDriverState *bs, *next_bs; | |
685 | ||
686 | GLOBAL_STATE_CODE(); | |
687 | QTAILQ_FOREACH_SAFE(bs, &monitor_bdrv_states, monitor_list, next_bs) { | |
688 | bdrv_unref(bs); | |
689 | } | |
690 | } | |
691 | ||
692 | /* Iterates over the list of monitor-owned BlockDriverStates */ | |
693 | BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs) | |
694 | { | |
695 | GLOBAL_STATE_CODE(); | |
696 | return bs ? QTAILQ_NEXT(bs, monitor_list) | |
697 | : QTAILQ_FIRST(&monitor_bdrv_states); | |
698 | } | |
699 | ||
700 | static bool qemu_opt_rename(QemuOpts *opts, const char *from, const char *to, | |
701 | Error **errp) | |
702 | { | |
703 | const char *value; | |
704 | ||
705 | value = qemu_opt_get(opts, from); | |
706 | if (value) { | |
707 | if (qemu_opt_find(opts, to)) { | |
708 | error_setg(errp, "'%s' and its alias '%s' can't be used at the " | |
709 | "same time", to, from); | |
710 | return false; | |
711 | } | |
712 | } | |
713 | ||
714 | /* rename all items in opts */ | |
715 | while ((value = qemu_opt_get(opts, from))) { | |
716 | qemu_opt_set(opts, to, value, &error_abort); | |
717 | qemu_opt_unset(opts, from); | |
718 | } | |
719 | return true; | |
720 | } | |
721 | ||
722 | QemuOptsList qemu_legacy_drive_opts = { | |
723 | .name = "drive", | |
724 | .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head), | |
725 | .desc = { | |
726 | { | |
727 | .name = "bus", | |
728 | .type = QEMU_OPT_NUMBER, | |
729 | .help = "bus number", | |
730 | },{ | |
731 | .name = "unit", | |
732 | .type = QEMU_OPT_NUMBER, | |
733 | .help = "unit number (i.e. lun for scsi)", | |
734 | },{ | |
735 | .name = "index", | |
736 | .type = QEMU_OPT_NUMBER, | |
737 | .help = "index number", | |
738 | },{ | |
739 | .name = "media", | |
740 | .type = QEMU_OPT_STRING, | |
741 | .help = "media type (disk, cdrom)", | |
742 | },{ | |
743 | .name = "if", | |
744 | .type = QEMU_OPT_STRING, | |
745 | .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)", | |
746 | },{ | |
747 | .name = "file", | |
748 | .type = QEMU_OPT_STRING, | |
749 | .help = "file name", | |
750 | }, | |
751 | ||
752 | /* Options that are passed on, but have special semantics with -drive */ | |
753 | { | |
754 | .name = BDRV_OPT_READ_ONLY, | |
755 | .type = QEMU_OPT_BOOL, | |
756 | .help = "open drive file as read-only", | |
757 | },{ | |
758 | .name = "rerror", | |
759 | .type = QEMU_OPT_STRING, | |
760 | .help = "read error action", | |
761 | },{ | |
762 | .name = "werror", | |
763 | .type = QEMU_OPT_STRING, | |
764 | .help = "write error action", | |
765 | },{ | |
766 | .name = "copy-on-read", | |
767 | .type = QEMU_OPT_BOOL, | |
768 | .help = "copy read data from backing file into image file", | |
769 | }, | |
770 | ||
771 | { /* end of list */ } | |
772 | }, | |
773 | }; | |
774 | ||
775 | DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type, | |
776 | Error **errp) | |
777 | { | |
778 | const char *value; | |
779 | BlockBackend *blk; | |
780 | DriveInfo *dinfo = NULL; | |
781 | QDict *bs_opts; | |
782 | QemuOpts *legacy_opts; | |
783 | DriveMediaType media = MEDIA_DISK; | |
784 | BlockInterfaceType type; | |
785 | int max_devs, bus_id, unit_id, index; | |
786 | const char *werror, *rerror; | |
787 | bool read_only = false; | |
788 | bool copy_on_read; | |
789 | const char *filename; | |
790 | int i; | |
791 | ||
792 | GLOBAL_STATE_CODE(); | |
793 | ||
794 | /* Change legacy command line options into QMP ones */ | |
795 | static const struct { | |
796 | const char *from; | |
797 | const char *to; | |
798 | } opt_renames[] = { | |
799 | { "iops", "throttling.iops-total" }, | |
800 | { "iops_rd", "throttling.iops-read" }, | |
801 | { "iops_wr", "throttling.iops-write" }, | |
802 | ||
803 | { "bps", "throttling.bps-total" }, | |
804 | { "bps_rd", "throttling.bps-read" }, | |
805 | { "bps_wr", "throttling.bps-write" }, | |
806 | ||
807 | { "iops_max", "throttling.iops-total-max" }, | |
808 | { "iops_rd_max", "throttling.iops-read-max" }, | |
809 | { "iops_wr_max", "throttling.iops-write-max" }, | |
810 | ||
811 | { "bps_max", "throttling.bps-total-max" }, | |
812 | { "bps_rd_max", "throttling.bps-read-max" }, | |
813 | { "bps_wr_max", "throttling.bps-write-max" }, | |
814 | ||
815 | { "iops_size", "throttling.iops-size" }, | |
816 | ||
817 | { "group", "throttling.group" }, | |
818 | ||
819 | { "readonly", BDRV_OPT_READ_ONLY }, | |
820 | }; | |
821 | ||
822 | for (i = 0; i < ARRAY_SIZE(opt_renames); i++) { | |
823 | if (!qemu_opt_rename(all_opts, opt_renames[i].from, | |
824 | opt_renames[i].to, errp)) { | |
825 | return NULL; | |
826 | } | |
827 | } | |
828 | ||
829 | value = qemu_opt_get(all_opts, "cache"); | |
830 | if (value) { | |
831 | int flags = 0; | |
832 | bool writethrough; | |
833 | ||
834 | if (bdrv_parse_cache_mode(value, &flags, &writethrough) != 0) { | |
835 | error_setg(errp, "invalid cache option"); | |
836 | return NULL; | |
837 | } | |
838 | ||
839 | /* Specific options take precedence */ | |
840 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_WB)) { | |
841 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_WB, | |
842 | !writethrough, &error_abort); | |
843 | } | |
844 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_DIRECT)) { | |
845 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_DIRECT, | |
846 | !!(flags & BDRV_O_NOCACHE), &error_abort); | |
847 | } | |
848 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_NO_FLUSH)) { | |
849 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_NO_FLUSH, | |
850 | !!(flags & BDRV_O_NO_FLUSH), &error_abort); | |
851 | } | |
852 | qemu_opt_unset(all_opts, "cache"); | |
853 | } | |
854 | ||
855 | /* Get a QDict for processing the options */ | |
856 | bs_opts = qdict_new(); | |
857 | qemu_opts_to_qdict(all_opts, bs_opts); | |
858 | ||
859 | legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0, | |
860 | &error_abort); | |
861 | if (!qemu_opts_absorb_qdict(legacy_opts, bs_opts, errp)) { | |
862 | goto fail; | |
863 | } | |
864 | ||
865 | /* Media type */ | |
866 | value = qemu_opt_get(legacy_opts, "media"); | |
867 | if (value) { | |
868 | if (!strcmp(value, "disk")) { | |
869 | media = MEDIA_DISK; | |
870 | } else if (!strcmp(value, "cdrom")) { | |
871 | media = MEDIA_CDROM; | |
872 | read_only = true; | |
873 | } else { | |
874 | error_setg(errp, "'%s' invalid media", value); | |
875 | goto fail; | |
876 | } | |
877 | } | |
878 | ||
879 | /* copy-on-read is disabled with a warning for read-only devices */ | |
880 | read_only |= qemu_opt_get_bool(legacy_opts, BDRV_OPT_READ_ONLY, false); | |
881 | copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false); | |
882 | ||
883 | if (read_only && copy_on_read) { | |
884 | warn_report("disabling copy-on-read on read-only drive"); | |
885 | copy_on_read = false; | |
886 | } | |
887 | ||
888 | qdict_put_str(bs_opts, BDRV_OPT_READ_ONLY, read_only ? "on" : "off"); | |
889 | qdict_put_str(bs_opts, "copy-on-read", copy_on_read ? "on" : "off"); | |
890 | ||
891 | /* Controller type */ | |
892 | value = qemu_opt_get(legacy_opts, "if"); | |
893 | if (value) { | |
894 | for (type = 0; | |
895 | type < IF_COUNT && strcmp(value, if_name[type]); | |
896 | type++) { | |
897 | } | |
898 | if (type == IF_COUNT) { | |
899 | error_setg(errp, "unsupported bus type '%s'", value); | |
900 | goto fail; | |
901 | } | |
902 | } else { | |
903 | type = block_default_type; | |
904 | } | |
905 | ||
906 | /* Device address specified by bus/unit or index. | |
907 | * If none was specified, try to find the first free one. */ | |
908 | bus_id = qemu_opt_get_number(legacy_opts, "bus", 0); | |
909 | unit_id = qemu_opt_get_number(legacy_opts, "unit", -1); | |
910 | index = qemu_opt_get_number(legacy_opts, "index", -1); | |
911 | ||
912 | max_devs = if_max_devs[type]; | |
913 | ||
914 | if (index != -1) { | |
915 | if (bus_id != 0 || unit_id != -1) { | |
916 | error_setg(errp, "index cannot be used with bus and unit"); | |
917 | goto fail; | |
918 | } | |
919 | bus_id = drive_index_to_bus_id(type, index); | |
920 | unit_id = drive_index_to_unit_id(type, index); | |
921 | } | |
922 | ||
923 | if (unit_id == -1) { | |
924 | unit_id = 0; | |
925 | while (drive_get(type, bus_id, unit_id) != NULL) { | |
926 | unit_id++; | |
927 | if (max_devs && unit_id >= max_devs) { | |
928 | unit_id -= max_devs; | |
929 | bus_id++; | |
930 | } | |
931 | } | |
932 | } | |
933 | ||
934 | if (max_devs && unit_id >= max_devs) { | |
935 | error_setg(errp, "unit %d too big (max is %d)", unit_id, max_devs - 1); | |
936 | goto fail; | |
937 | } | |
938 | ||
939 | if (drive_get(type, bus_id, unit_id) != NULL) { | |
940 | error_setg(errp, "drive with bus=%d, unit=%d (index=%d) exists", | |
941 | bus_id, unit_id, index); | |
942 | goto fail; | |
943 | } | |
944 | ||
945 | /* no id supplied -> create one */ | |
946 | if (qemu_opts_id(all_opts) == NULL) { | |
947 | char *new_id; | |
948 | const char *mediastr = ""; | |
949 | if (type == IF_IDE || type == IF_SCSI) { | |
950 | mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; | |
951 | } | |
952 | if (max_devs) { | |
953 | new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id, | |
954 | mediastr, unit_id); | |
955 | } else { | |
956 | new_id = g_strdup_printf("%s%s%i", if_name[type], | |
957 | mediastr, unit_id); | |
958 | } | |
959 | qdict_put_str(bs_opts, "id", new_id); | |
960 | g_free(new_id); | |
961 | } | |
962 | ||
963 | /* Add virtio block device */ | |
964 | if (type == IF_VIRTIO) { | |
965 | QemuOpts *devopts; | |
966 | devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0, | |
967 | &error_abort); | |
968 | qemu_opt_set(devopts, "driver", "virtio-blk", &error_abort); | |
969 | qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"), | |
970 | &error_abort); | |
971 | } else if (type == IF_XEN) { | |
972 | QemuOpts *devopts; | |
973 | devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0, | |
974 | &error_abort); | |
975 | qemu_opt_set(devopts, "driver", | |
976 | (media == MEDIA_CDROM) ? "xen-cdrom" : "xen-disk", | |
977 | &error_abort); | |
978 | qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"), | |
979 | &error_abort); | |
980 | } | |
981 | ||
982 | filename = qemu_opt_get(legacy_opts, "file"); | |
983 | ||
984 | /* Check werror/rerror compatibility with if=... */ | |
985 | werror = qemu_opt_get(legacy_opts, "werror"); | |
986 | if (werror != NULL) { | |
987 | if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && | |
988 | type != IF_NONE) { | |
989 | error_setg(errp, "werror is not supported by this bus type"); | |
990 | goto fail; | |
991 | } | |
992 | qdict_put_str(bs_opts, "werror", werror); | |
993 | } | |
994 | ||
995 | rerror = qemu_opt_get(legacy_opts, "rerror"); | |
996 | if (rerror != NULL) { | |
997 | if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && | |
998 | type != IF_NONE) { | |
999 | error_setg(errp, "rerror is not supported by this bus type"); | |
1000 | goto fail; | |
1001 | } | |
1002 | qdict_put_str(bs_opts, "rerror", rerror); | |
1003 | } | |
1004 | ||
1005 | /* Actual block device init: Functionality shared with blockdev-add */ | |
1006 | blk = blockdev_init(filename, bs_opts, errp); | |
1007 | bs_opts = NULL; | |
1008 | if (!blk) { | |
1009 | goto fail; | |
1010 | } | |
1011 | ||
1012 | /* Create legacy DriveInfo */ | |
1013 | dinfo = g_malloc0(sizeof(*dinfo)); | |
1014 | dinfo->opts = all_opts; | |
1015 | ||
1016 | dinfo->type = type; | |
1017 | dinfo->bus = bus_id; | |
1018 | dinfo->unit = unit_id; | |
1019 | ||
1020 | blk_set_legacy_dinfo(blk, dinfo); | |
1021 | ||
1022 | switch(type) { | |
1023 | case IF_IDE: | |
1024 | case IF_SCSI: | |
1025 | case IF_XEN: | |
1026 | case IF_NONE: | |
1027 | dinfo->media_cd = media == MEDIA_CDROM; | |
1028 | break; | |
1029 | default: | |
1030 | break; | |
1031 | } | |
1032 | ||
1033 | fail: | |
1034 | qemu_opts_del(legacy_opts); | |
1035 | qobject_unref(bs_opts); | |
1036 | return dinfo; | |
1037 | } | |
1038 | ||
1039 | static BlockDriverState *qmp_get_root_bs(const char *name, Error **errp) | |
1040 | { | |
1041 | BlockDriverState *bs; | |
1042 | ||
1043 | GRAPH_RDLOCK_GUARD_MAINLOOP(); | |
1044 | ||
1045 | bs = bdrv_lookup_bs(name, name, errp); | |
1046 | if (bs == NULL) { | |
1047 | return NULL; | |
1048 | } | |
1049 | ||
1050 | if (!bdrv_is_root_node(bs)) { | |
1051 | error_setg(errp, "Need a root block node"); | |
1052 | return NULL; | |
1053 | } | |
1054 | ||
1055 | if (!bdrv_is_inserted(bs)) { | |
1056 | error_setg(errp, "Device has no medium"); | |
1057 | bs = NULL; | |
1058 | } | |
1059 | ||
1060 | return bs; | |
1061 | } | |
1062 | ||
1063 | static void blockdev_do_action(TransactionAction *action, Error **errp) | |
1064 | { | |
1065 | TransactionActionList list; | |
1066 | ||
1067 | list.value = action; | |
1068 | list.next = NULL; | |
1069 | qmp_transaction(&list, NULL, errp); | |
1070 | } | |
1071 | ||
1072 | void qmp_blockdev_snapshot_sync(const char *device, const char *node_name, | |
1073 | const char *snapshot_file, | |
1074 | const char *snapshot_node_name, | |
1075 | const char *format, | |
1076 | bool has_mode, NewImageMode mode, Error **errp) | |
1077 | { | |
1078 | BlockdevSnapshotSync snapshot = { | |
1079 | .device = (char *) device, | |
1080 | .node_name = (char *) node_name, | |
1081 | .snapshot_file = (char *) snapshot_file, | |
1082 | .snapshot_node_name = (char *) snapshot_node_name, | |
1083 | .format = (char *) format, | |
1084 | .has_mode = has_mode, | |
1085 | .mode = mode, | |
1086 | }; | |
1087 | TransactionAction action = { | |
1088 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, | |
1089 | .u.blockdev_snapshot_sync.data = &snapshot, | |
1090 | }; | |
1091 | blockdev_do_action(&action, errp); | |
1092 | } | |
1093 | ||
1094 | void qmp_blockdev_snapshot(const char *node, const char *overlay, | |
1095 | Error **errp) | |
1096 | { | |
1097 | BlockdevSnapshot snapshot_data = { | |
1098 | .node = (char *) node, | |
1099 | .overlay = (char *) overlay | |
1100 | }; | |
1101 | TransactionAction action = { | |
1102 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT, | |
1103 | .u.blockdev_snapshot.data = &snapshot_data, | |
1104 | }; | |
1105 | blockdev_do_action(&action, errp); | |
1106 | } | |
1107 | ||
1108 | void qmp_blockdev_snapshot_internal_sync(const char *device, | |
1109 | const char *name, | |
1110 | Error **errp) | |
1111 | { | |
1112 | BlockdevSnapshotInternal snapshot = { | |
1113 | .device = (char *) device, | |
1114 | .name = (char *) name | |
1115 | }; | |
1116 | TransactionAction action = { | |
1117 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC, | |
1118 | .u.blockdev_snapshot_internal_sync.data = &snapshot, | |
1119 | }; | |
1120 | blockdev_do_action(&action, errp); | |
1121 | } | |
1122 | ||
1123 | SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device, | |
1124 | const char *id, | |
1125 | const char *name, | |
1126 | Error **errp) | |
1127 | { | |
1128 | BlockDriverState *bs; | |
1129 | QEMUSnapshotInfo sn; | |
1130 | Error *local_err = NULL; | |
1131 | SnapshotInfo *info = NULL; | |
1132 | int ret; | |
1133 | ||
1134 | GLOBAL_STATE_CODE(); | |
1135 | GRAPH_RDLOCK_GUARD_MAINLOOP(); | |
1136 | ||
1137 | bs = qmp_get_root_bs(device, errp); | |
1138 | if (!bs) { | |
1139 | return NULL; | |
1140 | } | |
1141 | ||
1142 | if (!id && !name) { | |
1143 | error_setg(errp, "Name or id must be provided"); | |
1144 | return NULL; | |
1145 | } | |
1146 | ||
1147 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, errp)) { | |
1148 | return NULL; | |
1149 | } | |
1150 | ||
1151 | ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err); | |
1152 | if (local_err) { | |
1153 | error_propagate(errp, local_err); | |
1154 | return NULL; | |
1155 | } | |
1156 | if (!ret) { | |
1157 | error_setg(errp, | |
1158 | "Snapshot with id '%s' and name '%s' does not exist on " | |
1159 | "device '%s'", | |
1160 | STR_OR_NULL(id), STR_OR_NULL(name), device); | |
1161 | return NULL; | |
1162 | } | |
1163 | ||
1164 | bdrv_snapshot_delete(bs, id, name, &local_err); | |
1165 | if (local_err) { | |
1166 | error_propagate(errp, local_err); | |
1167 | return NULL; | |
1168 | } | |
1169 | ||
1170 | info = g_new0(SnapshotInfo, 1); | |
1171 | info->id = g_strdup(sn.id_str); | |
1172 | info->name = g_strdup(sn.name); | |
1173 | info->date_nsec = sn.date_nsec; | |
1174 | info->date_sec = sn.date_sec; | |
1175 | info->vm_state_size = sn.vm_state_size; | |
1176 | info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000; | |
1177 | info->vm_clock_sec = sn.vm_clock_nsec / 1000000000; | |
1178 | if (sn.icount != -1ULL) { | |
1179 | info->icount = sn.icount; | |
1180 | info->has_icount = true; | |
1181 | } | |
1182 | ||
1183 | return info; | |
1184 | } | |
1185 | ||
1186 | /* internal snapshot private data */ | |
1187 | typedef struct InternalSnapshotState { | |
1188 | BlockDriverState *bs; | |
1189 | QEMUSnapshotInfo sn; | |
1190 | bool created; | |
1191 | } InternalSnapshotState; | |
1192 | ||
1193 | static void internal_snapshot_abort(void *opaque); | |
1194 | static void internal_snapshot_clean(void *opaque); | |
1195 | TransactionActionDrv internal_snapshot_drv = { | |
1196 | .abort = internal_snapshot_abort, | |
1197 | .clean = internal_snapshot_clean, | |
1198 | }; | |
1199 | ||
1200 | static void internal_snapshot_action(BlockdevSnapshotInternal *internal, | |
1201 | Transaction *tran, Error **errp) | |
1202 | { | |
1203 | Error *local_err = NULL; | |
1204 | const char *device; | |
1205 | const char *name; | |
1206 | BlockDriverState *bs; | |
1207 | QEMUSnapshotInfo old_sn, *sn; | |
1208 | bool ret; | |
1209 | int64_t rt; | |
1210 | InternalSnapshotState *state = g_new0(InternalSnapshotState, 1); | |
1211 | int ret1; | |
1212 | ||
1213 | GLOBAL_STATE_CODE(); | |
1214 | GRAPH_RDLOCK_GUARD_MAINLOOP(); | |
1215 | ||
1216 | tran_add(tran, &internal_snapshot_drv, state); | |
1217 | ||
1218 | device = internal->device; | |
1219 | name = internal->name; | |
1220 | ||
1221 | bs = qmp_get_root_bs(device, errp); | |
1222 | if (!bs) { | |
1223 | return; | |
1224 | } | |
1225 | ||
1226 | state->bs = bs; | |
1227 | ||
1228 | /* Paired with .clean() */ | |
1229 | bdrv_drained_begin(bs); | |
1230 | ||
1231 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, errp)) { | |
1232 | return; | |
1233 | } | |
1234 | ||
1235 | if (bdrv_is_read_only(bs)) { | |
1236 | error_setg(errp, "Device '%s' is read only", device); | |
1237 | return; | |
1238 | } | |
1239 | ||
1240 | if (!bdrv_can_snapshot(bs)) { | |
1241 | error_setg(errp, "Block format '%s' used by device '%s' " | |
1242 | "does not support internal snapshots", | |
1243 | bs->drv->format_name, device); | |
1244 | return; | |
1245 | } | |
1246 | ||
1247 | if (!strlen(name)) { | |
1248 | error_setg(errp, "Name is empty"); | |
1249 | return; | |
1250 | } | |
1251 | ||
1252 | /* check whether a snapshot with name exist */ | |
1253 | ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn, | |
1254 | &local_err); | |
1255 | if (local_err) { | |
1256 | error_propagate(errp, local_err); | |
1257 | return; | |
1258 | } else if (ret) { | |
1259 | error_setg(errp, | |
1260 | "Snapshot with name '%s' already exists on device '%s'", | |
1261 | name, device); | |
1262 | return; | |
1263 | } | |
1264 | ||
1265 | /* 3. take the snapshot */ | |
1266 | sn = &state->sn; | |
1267 | pstrcpy(sn->name, sizeof(sn->name), name); | |
1268 | rt = g_get_real_time(); | |
1269 | sn->date_sec = rt / G_USEC_PER_SEC; | |
1270 | sn->date_nsec = (rt % G_USEC_PER_SEC) * 1000; | |
1271 | sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); | |
1272 | if (replay_mode != REPLAY_MODE_NONE) { | |
1273 | sn->icount = replay_get_current_icount(); | |
1274 | } else { | |
1275 | sn->icount = -1ULL; | |
1276 | } | |
1277 | ||
1278 | ret1 = bdrv_snapshot_create(bs, sn); | |
1279 | if (ret1 < 0) { | |
1280 | error_setg_errno(errp, -ret1, | |
1281 | "Failed to create snapshot '%s' on device '%s'", | |
1282 | name, device); | |
1283 | return; | |
1284 | } | |
1285 | ||
1286 | /* 4. succeed, mark a snapshot is created */ | |
1287 | state->created = true; | |
1288 | } | |
1289 | ||
1290 | static void internal_snapshot_abort(void *opaque) | |
1291 | { | |
1292 | InternalSnapshotState *state = opaque; | |
1293 | BlockDriverState *bs = state->bs; | |
1294 | QEMUSnapshotInfo *sn = &state->sn; | |
1295 | Error *local_error = NULL; | |
1296 | ||
1297 | GLOBAL_STATE_CODE(); | |
1298 | GRAPH_RDLOCK_GUARD_MAINLOOP(); | |
1299 | ||
1300 | if (!state->created) { | |
1301 | return; | |
1302 | } | |
1303 | ||
1304 | if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) { | |
1305 | error_reportf_err(local_error, | |
1306 | "Failed to delete snapshot with id '%s' and " | |
1307 | "name '%s' on device '%s' in abort: ", | |
1308 | sn->id_str, sn->name, | |
1309 | bdrv_get_device_name(bs)); | |
1310 | } | |
1311 | } | |
1312 | ||
1313 | static void internal_snapshot_clean(void *opaque) | |
1314 | { | |
1315 | g_autofree InternalSnapshotState *state = opaque; | |
1316 | ||
1317 | if (!state->bs) { | |
1318 | return; | |
1319 | } | |
1320 | ||
1321 | bdrv_drained_end(state->bs); | |
1322 | } | |
1323 | ||
1324 | /* external snapshot private data */ | |
1325 | typedef struct ExternalSnapshotState { | |
1326 | BlockDriverState *old_bs; | |
1327 | BlockDriverState *new_bs; | |
1328 | bool overlay_appended; | |
1329 | } ExternalSnapshotState; | |
1330 | ||
1331 | static void external_snapshot_commit(void *opaque); | |
1332 | static void external_snapshot_abort(void *opaque); | |
1333 | static void external_snapshot_clean(void *opaque); | |
1334 | TransactionActionDrv external_snapshot_drv = { | |
1335 | .commit = external_snapshot_commit, | |
1336 | .abort = external_snapshot_abort, | |
1337 | .clean = external_snapshot_clean, | |
1338 | }; | |
1339 | ||
1340 | static void external_snapshot_action(TransactionAction *action, | |
1341 | Transaction *tran, Error **errp) | |
1342 | { | |
1343 | int ret; | |
1344 | int flags = 0; | |
1345 | QDict *options = NULL; | |
1346 | Error *local_err = NULL; | |
1347 | /* Device and node name of the image to generate the snapshot from */ | |
1348 | const char *device; | |
1349 | const char *node_name; | |
1350 | /* Reference to the new image (for 'blockdev-snapshot') */ | |
1351 | const char *snapshot_ref; | |
1352 | /* File name of the new image (for 'blockdev-snapshot-sync') */ | |
1353 | const char *new_image_file; | |
1354 | ExternalSnapshotState *state = g_new0(ExternalSnapshotState, 1); | |
1355 | uint64_t perm, shared; | |
1356 | ||
1357 | /* TODO We'll eventually have to take a writer lock in this function */ | |
1358 | GRAPH_RDLOCK_GUARD_MAINLOOP(); | |
1359 | ||
1360 | tran_add(tran, &external_snapshot_drv, state); | |
1361 | ||
1362 | /* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar | |
1363 | * purpose but a different set of parameters */ | |
1364 | switch (action->type) { | |
1365 | case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT: | |
1366 | { | |
1367 | BlockdevSnapshot *s = action->u.blockdev_snapshot.data; | |
1368 | device = s->node; | |
1369 | node_name = s->node; | |
1370 | new_image_file = NULL; | |
1371 | snapshot_ref = s->overlay; | |
1372 | } | |
1373 | break; | |
1374 | case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC: | |
1375 | { | |
1376 | BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data; | |
1377 | device = s->device; | |
1378 | node_name = s->node_name; | |
1379 | new_image_file = s->snapshot_file; | |
1380 | snapshot_ref = NULL; | |
1381 | } | |
1382 | break; | |
1383 | default: | |
1384 | g_assert_not_reached(); | |
1385 | } | |
1386 | ||
1387 | /* start processing */ | |
1388 | ||
1389 | state->old_bs = bdrv_lookup_bs(device, node_name, errp); | |
1390 | if (!state->old_bs) { | |
1391 | return; | |
1392 | } | |
1393 | ||
1394 | /* Paired with .clean() */ | |
1395 | bdrv_drained_begin(state->old_bs); | |
1396 | ||
1397 | if (!bdrv_is_inserted(state->old_bs)) { | |
1398 | error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
1399 | return; | |
1400 | } | |
1401 | ||
1402 | if (bdrv_op_is_blocked(state->old_bs, | |
1403 | BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, errp)) { | |
1404 | return; | |
1405 | } | |
1406 | ||
1407 | if (!bdrv_is_read_only(state->old_bs)) { | |
1408 | if (bdrv_flush(state->old_bs)) { | |
1409 | error_setg(errp, QERR_IO_ERROR); | |
1410 | return; | |
1411 | } | |
1412 | } | |
1413 | ||
1414 | if (action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC) { | |
1415 | BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data; | |
1416 | const char *format = s->format ?: "qcow2"; | |
1417 | enum NewImageMode mode; | |
1418 | const char *snapshot_node_name = s->snapshot_node_name; | |
1419 | ||
1420 | if (node_name && !snapshot_node_name) { | |
1421 | error_setg(errp, "New overlay node-name missing"); | |
1422 | return; | |
1423 | } | |
1424 | ||
1425 | if (snapshot_node_name && | |
1426 | bdrv_lookup_bs(snapshot_node_name, snapshot_node_name, NULL)) { | |
1427 | error_setg(errp, "New overlay node-name already in use"); | |
1428 | return; | |
1429 | } | |
1430 | ||
1431 | flags = state->old_bs->open_flags; | |
1432 | flags &= ~(BDRV_O_SNAPSHOT | BDRV_O_COPY_ON_READ); | |
1433 | flags |= BDRV_O_NO_BACKING; | |
1434 | ||
1435 | /* create new image w/backing file */ | |
1436 | mode = s->has_mode ? s->mode : NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
1437 | if (mode != NEW_IMAGE_MODE_EXISTING) { | |
1438 | int64_t size = bdrv_getlength(state->old_bs); | |
1439 | if (size < 0) { | |
1440 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
1441 | return; | |
1442 | } | |
1443 | bdrv_refresh_filename(state->old_bs); | |
1444 | ||
1445 | bdrv_img_create(new_image_file, format, | |
1446 | state->old_bs->filename, | |
1447 | state->old_bs->drv->format_name, | |
1448 | NULL, size, flags, false, &local_err); | |
1449 | ||
1450 | if (local_err) { | |
1451 | error_propagate(errp, local_err); | |
1452 | return; | |
1453 | } | |
1454 | } | |
1455 | ||
1456 | options = qdict_new(); | |
1457 | if (snapshot_node_name) { | |
1458 | qdict_put_str(options, "node-name", snapshot_node_name); | |
1459 | } | |
1460 | qdict_put_str(options, "driver", format); | |
1461 | } | |
1462 | ||
1463 | state->new_bs = bdrv_open(new_image_file, snapshot_ref, options, flags, | |
1464 | errp); | |
1465 | ||
1466 | /* We will manually add the backing_hd field to the bs later */ | |
1467 | if (!state->new_bs) { | |
1468 | return; | |
1469 | } | |
1470 | ||
1471 | /* | |
1472 | * Allow attaching a backing file to an overlay that's already in use only | |
1473 | * if the parents don't assume that they are already seeing a valid image. | |
1474 | * (Specifically, allow it as a mirror target, which is write-only access.) | |
1475 | */ | |
1476 | bdrv_get_cumulative_perm(state->new_bs, &perm, &shared); | |
1477 | if (perm & BLK_PERM_CONSISTENT_READ) { | |
1478 | error_setg(errp, "The overlay is already in use"); | |
1479 | return; | |
1480 | } | |
1481 | ||
1482 | if (state->new_bs->drv->is_filter) { | |
1483 | error_setg(errp, "Filters cannot be used as overlays"); | |
1484 | return; | |
1485 | } | |
1486 | ||
1487 | if (bdrv_cow_child(state->new_bs)) { | |
1488 | error_setg(errp, "The overlay already has a backing image"); | |
1489 | return; | |
1490 | } | |
1491 | ||
1492 | if (!state->new_bs->drv->supports_backing) { | |
1493 | error_setg(errp, "The overlay does not support backing images"); | |
1494 | return; | |
1495 | } | |
1496 | ||
1497 | ret = bdrv_append(state->new_bs, state->old_bs, errp); | |
1498 | if (ret < 0) { | |
1499 | return; | |
1500 | } | |
1501 | state->overlay_appended = true; | |
1502 | } | |
1503 | ||
1504 | static void external_snapshot_commit(void *opaque) | |
1505 | { | |
1506 | ExternalSnapshotState *state = opaque; | |
1507 | ||
1508 | /* We don't need (or want) to use the transactional | |
1509 | * bdrv_reopen_multiple() across all the entries at once, because we | |
1510 | * don't want to abort all of them if one of them fails the reopen */ | |
1511 | if (!qatomic_read(&state->old_bs->copy_on_read)) { | |
1512 | bdrv_reopen_set_read_only(state->old_bs, true, NULL); | |
1513 | } | |
1514 | } | |
1515 | ||
1516 | static void external_snapshot_abort(void *opaque) | |
1517 | { | |
1518 | ExternalSnapshotState *state = opaque; | |
1519 | if (state->new_bs) { | |
1520 | if (state->overlay_appended) { | |
1521 | AioContext *aio_context; | |
1522 | AioContext *tmp_context; | |
1523 | int ret; | |
1524 | ||
1525 | aio_context = bdrv_get_aio_context(state->old_bs); | |
1526 | ||
1527 | bdrv_ref(state->old_bs); /* we can't let bdrv_set_backind_hd() | |
1528 | close state->old_bs; we need it */ | |
1529 | bdrv_set_backing_hd(state->new_bs, NULL, &error_abort); | |
1530 | ||
1531 | /* | |
1532 | * The call to bdrv_set_backing_hd() above returns state->old_bs to | |
1533 | * the main AioContext. As we're still going to be using it, return | |
1534 | * it to the AioContext it was before. | |
1535 | */ | |
1536 | tmp_context = bdrv_get_aio_context(state->old_bs); | |
1537 | if (aio_context != tmp_context) { | |
1538 | ret = bdrv_try_change_aio_context(state->old_bs, | |
1539 | aio_context, NULL, NULL); | |
1540 | assert(ret == 0); | |
1541 | } | |
1542 | ||
1543 | bdrv_drained_begin(state->new_bs); | |
1544 | bdrv_graph_wrlock(); | |
1545 | bdrv_replace_node(state->new_bs, state->old_bs, &error_abort); | |
1546 | bdrv_graph_wrunlock(); | |
1547 | bdrv_drained_end(state->new_bs); | |
1548 | ||
1549 | bdrv_unref(state->old_bs); /* bdrv_replace_node() ref'ed old_bs */ | |
1550 | } | |
1551 | } | |
1552 | } | |
1553 | ||
1554 | static void external_snapshot_clean(void *opaque) | |
1555 | { | |
1556 | g_autofree ExternalSnapshotState *state = opaque; | |
1557 | ||
1558 | if (!state->old_bs) { | |
1559 | return; | |
1560 | } | |
1561 | ||
1562 | bdrv_drained_end(state->old_bs); | |
1563 | bdrv_unref(state->new_bs); | |
1564 | } | |
1565 | ||
1566 | typedef struct DriveBackupState { | |
1567 | BlockDriverState *bs; | |
1568 | BlockJob *job; | |
1569 | } DriveBackupState; | |
1570 | ||
1571 | static BlockJob *do_backup_common(BackupCommon *backup, | |
1572 | BlockDriverState *bs, | |
1573 | BlockDriverState *target_bs, | |
1574 | AioContext *aio_context, | |
1575 | JobTxn *txn, Error **errp); | |
1576 | ||
1577 | static void drive_backup_commit(void *opaque); | |
1578 | static void drive_backup_abort(void *opaque); | |
1579 | static void drive_backup_clean(void *opaque); | |
1580 | TransactionActionDrv drive_backup_drv = { | |
1581 | .commit = drive_backup_commit, | |
1582 | .abort = drive_backup_abort, | |
1583 | .clean = drive_backup_clean, | |
1584 | }; | |
1585 | ||
1586 | static void drive_backup_action(DriveBackup *backup, | |
1587 | JobTxn *block_job_txn, | |
1588 | Transaction *tran, Error **errp) | |
1589 | { | |
1590 | DriveBackupState *state = g_new0(DriveBackupState, 1); | |
1591 | BlockDriverState *bs; | |
1592 | BlockDriverState *target_bs; | |
1593 | BlockDriverState *source = NULL; | |
1594 | AioContext *aio_context; | |
1595 | const char *format; | |
1596 | QDict *options; | |
1597 | Error *local_err = NULL; | |
1598 | int flags; | |
1599 | int64_t size; | |
1600 | bool set_backing_hd = false; | |
1601 | int ret; | |
1602 | ||
1603 | GLOBAL_STATE_CODE(); | |
1604 | ||
1605 | tran_add(tran, &drive_backup_drv, state); | |
1606 | ||
1607 | if (!backup->has_mode) { | |
1608 | backup->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
1609 | } | |
1610 | ||
1611 | bs = bdrv_lookup_bs(backup->device, backup->device, errp); | |
1612 | if (!bs) { | |
1613 | return; | |
1614 | } | |
1615 | ||
1616 | if (!bs->drv) { | |
1617 | error_setg(errp, "Device has no medium"); | |
1618 | return; | |
1619 | } | |
1620 | ||
1621 | aio_context = bdrv_get_aio_context(bs); | |
1622 | ||
1623 | state->bs = bs; | |
1624 | /* Paired with .clean() */ | |
1625 | bdrv_drained_begin(bs); | |
1626 | ||
1627 | format = backup->format; | |
1628 | if (!format && backup->mode != NEW_IMAGE_MODE_EXISTING) { | |
1629 | format = bs->drv->format_name; | |
1630 | } | |
1631 | ||
1632 | /* Early check to avoid creating target */ | |
1633 | bdrv_graph_rdlock_main_loop(); | |
1634 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) { | |
1635 | bdrv_graph_rdunlock_main_loop(); | |
1636 | return; | |
1637 | } | |
1638 | ||
1639 | flags = bs->open_flags | BDRV_O_RDWR; | |
1640 | ||
1641 | /* | |
1642 | * See if we have a backing HD we can use to create our new image | |
1643 | * on top of. | |
1644 | */ | |
1645 | if (backup->sync == MIRROR_SYNC_MODE_TOP) { | |
1646 | /* | |
1647 | * Backup will not replace the source by the target, so none | |
1648 | * of the filters skipped here will be removed (in contrast to | |
1649 | * mirror). Therefore, we can skip all of them when looking | |
1650 | * for the first COW relationship. | |
1651 | */ | |
1652 | source = bdrv_cow_bs(bdrv_skip_filters(bs)); | |
1653 | if (!source) { | |
1654 | backup->sync = MIRROR_SYNC_MODE_FULL; | |
1655 | } | |
1656 | } | |
1657 | if (backup->sync == MIRROR_SYNC_MODE_NONE) { | |
1658 | source = bs; | |
1659 | flags |= BDRV_O_NO_BACKING; | |
1660 | set_backing_hd = true; | |
1661 | } | |
1662 | bdrv_graph_rdunlock_main_loop(); | |
1663 | ||
1664 | size = bdrv_getlength(bs); | |
1665 | if (size < 0) { | |
1666 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
1667 | return; | |
1668 | } | |
1669 | ||
1670 | if (backup->mode != NEW_IMAGE_MODE_EXISTING) { | |
1671 | assert(format); | |
1672 | if (source) { | |
1673 | /* Implicit filters should not appear in the filename */ | |
1674 | BlockDriverState *explicit_backing; | |
1675 | ||
1676 | bdrv_graph_rdlock_main_loop(); | |
1677 | explicit_backing = bdrv_skip_implicit_filters(source); | |
1678 | bdrv_refresh_filename(explicit_backing); | |
1679 | bdrv_graph_rdunlock_main_loop(); | |
1680 | ||
1681 | bdrv_img_create(backup->target, format, | |
1682 | explicit_backing->filename, | |
1683 | explicit_backing->drv->format_name, NULL, | |
1684 | size, flags, false, &local_err); | |
1685 | } else { | |
1686 | bdrv_img_create(backup->target, format, NULL, NULL, NULL, | |
1687 | size, flags, false, &local_err); | |
1688 | } | |
1689 | } | |
1690 | ||
1691 | if (local_err) { | |
1692 | error_propagate(errp, local_err); | |
1693 | return; | |
1694 | } | |
1695 | ||
1696 | options = qdict_new(); | |
1697 | qdict_put_str(options, "discard", "unmap"); | |
1698 | qdict_put_str(options, "detect-zeroes", "unmap"); | |
1699 | if (format) { | |
1700 | qdict_put_str(options, "driver", format); | |
1701 | } | |
1702 | ||
1703 | target_bs = bdrv_open(backup->target, NULL, options, flags, errp); | |
1704 | if (!target_bs) { | |
1705 | return; | |
1706 | } | |
1707 | ||
1708 | ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp); | |
1709 | if (ret < 0) { | |
1710 | bdrv_unref(target_bs); | |
1711 | return; | |
1712 | } | |
1713 | ||
1714 | if (set_backing_hd) { | |
1715 | if (bdrv_set_backing_hd(target_bs, source, errp) < 0) { | |
1716 | goto unref; | |
1717 | } | |
1718 | } | |
1719 | ||
1720 | state->job = do_backup_common(qapi_DriveBackup_base(backup), | |
1721 | bs, target_bs, aio_context, | |
1722 | block_job_txn, errp); | |
1723 | ||
1724 | unref: | |
1725 | bdrv_unref(target_bs); | |
1726 | } | |
1727 | ||
1728 | static void drive_backup_commit(void *opaque) | |
1729 | { | |
1730 | DriveBackupState *state = opaque; | |
1731 | ||
1732 | assert(state->job); | |
1733 | job_start(&state->job->job); | |
1734 | } | |
1735 | ||
1736 | static void drive_backup_abort(void *opaque) | |
1737 | { | |
1738 | DriveBackupState *state = opaque; | |
1739 | ||
1740 | if (state->job) { | |
1741 | job_cancel_sync(&state->job->job, true); | |
1742 | } | |
1743 | } | |
1744 | ||
1745 | static void drive_backup_clean(void *opaque) | |
1746 | { | |
1747 | g_autofree DriveBackupState *state = opaque; | |
1748 | ||
1749 | if (!state->bs) { | |
1750 | return; | |
1751 | } | |
1752 | ||
1753 | bdrv_drained_end(state->bs); | |
1754 | } | |
1755 | ||
1756 | typedef struct BlockdevBackupState { | |
1757 | BlockDriverState *bs; | |
1758 | BlockJob *job; | |
1759 | } BlockdevBackupState; | |
1760 | ||
1761 | static void blockdev_backup_commit(void *opaque); | |
1762 | static void blockdev_backup_abort(void *opaque); | |
1763 | static void blockdev_backup_clean(void *opaque); | |
1764 | TransactionActionDrv blockdev_backup_drv = { | |
1765 | .commit = blockdev_backup_commit, | |
1766 | .abort = blockdev_backup_abort, | |
1767 | .clean = blockdev_backup_clean, | |
1768 | }; | |
1769 | ||
1770 | static void blockdev_backup_action(BlockdevBackup *backup, | |
1771 | JobTxn *block_job_txn, | |
1772 | Transaction *tran, Error **errp) | |
1773 | { | |
1774 | BlockdevBackupState *state = g_new0(BlockdevBackupState, 1); | |
1775 | BlockDriverState *bs; | |
1776 | BlockDriverState *target_bs; | |
1777 | AioContext *aio_context; | |
1778 | int ret; | |
1779 | ||
1780 | tran_add(tran, &blockdev_backup_drv, state); | |
1781 | ||
1782 | bs = bdrv_lookup_bs(backup->device, backup->device, errp); | |
1783 | if (!bs) { | |
1784 | return; | |
1785 | } | |
1786 | ||
1787 | target_bs = bdrv_lookup_bs(backup->target, backup->target, errp); | |
1788 | if (!target_bs) { | |
1789 | return; | |
1790 | } | |
1791 | ||
1792 | /* Honor bdrv_try_change_aio_context() context acquisition requirements. */ | |
1793 | aio_context = bdrv_get_aio_context(bs); | |
1794 | ||
1795 | ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp); | |
1796 | if (ret < 0) { | |
1797 | return; | |
1798 | } | |
1799 | ||
1800 | state->bs = bs; | |
1801 | ||
1802 | /* Paired with .clean() */ | |
1803 | bdrv_drained_begin(state->bs); | |
1804 | ||
1805 | state->job = do_backup_common(qapi_BlockdevBackup_base(backup), | |
1806 | bs, target_bs, aio_context, | |
1807 | block_job_txn, errp); | |
1808 | } | |
1809 | ||
1810 | static void blockdev_backup_commit(void *opaque) | |
1811 | { | |
1812 | BlockdevBackupState *state = opaque; | |
1813 | ||
1814 | assert(state->job); | |
1815 | job_start(&state->job->job); | |
1816 | } | |
1817 | ||
1818 | static void blockdev_backup_abort(void *opaque) | |
1819 | { | |
1820 | BlockdevBackupState *state = opaque; | |
1821 | ||
1822 | if (state->job) { | |
1823 | job_cancel_sync(&state->job->job, true); | |
1824 | } | |
1825 | } | |
1826 | ||
1827 | static void blockdev_backup_clean(void *opaque) | |
1828 | { | |
1829 | g_autofree BlockdevBackupState *state = opaque; | |
1830 | ||
1831 | if (!state->bs) { | |
1832 | return; | |
1833 | } | |
1834 | ||
1835 | bdrv_drained_end(state->bs); | |
1836 | } | |
1837 | ||
1838 | typedef struct BlockDirtyBitmapState { | |
1839 | BdrvDirtyBitmap *bitmap; | |
1840 | BlockDriverState *bs; | |
1841 | HBitmap *backup; | |
1842 | bool was_enabled; | |
1843 | } BlockDirtyBitmapState; | |
1844 | ||
1845 | static void block_dirty_bitmap_add_abort(void *opaque); | |
1846 | TransactionActionDrv block_dirty_bitmap_add_drv = { | |
1847 | .abort = block_dirty_bitmap_add_abort, | |
1848 | .clean = g_free, | |
1849 | }; | |
1850 | ||
1851 | static void block_dirty_bitmap_add_action(BlockDirtyBitmapAdd *action, | |
1852 | Transaction *tran, Error **errp) | |
1853 | { | |
1854 | Error *local_err = NULL; | |
1855 | BlockDirtyBitmapState *state = g_new0(BlockDirtyBitmapState, 1); | |
1856 | ||
1857 | tran_add(tran, &block_dirty_bitmap_add_drv, state); | |
1858 | ||
1859 | /* AIO context taken and released within qmp_block_dirty_bitmap_add */ | |
1860 | qmp_block_dirty_bitmap_add(action->node, action->name, | |
1861 | action->has_granularity, action->granularity, | |
1862 | action->has_persistent, action->persistent, | |
1863 | action->has_disabled, action->disabled, | |
1864 | &local_err); | |
1865 | ||
1866 | if (!local_err) { | |
1867 | state->bitmap = block_dirty_bitmap_lookup(action->node, action->name, | |
1868 | NULL, &error_abort); | |
1869 | } else { | |
1870 | error_propagate(errp, local_err); | |
1871 | } | |
1872 | } | |
1873 | ||
1874 | static void block_dirty_bitmap_add_abort(void *opaque) | |
1875 | { | |
1876 | BlockDirtyBitmapState *state = opaque; | |
1877 | ||
1878 | if (state->bitmap) { | |
1879 | bdrv_release_dirty_bitmap(state->bitmap); | |
1880 | } | |
1881 | } | |
1882 | ||
1883 | static void block_dirty_bitmap_restore(void *opaque); | |
1884 | static void block_dirty_bitmap_free_backup(void *opaque); | |
1885 | TransactionActionDrv block_dirty_bitmap_clear_drv = { | |
1886 | .abort = block_dirty_bitmap_restore, | |
1887 | .commit = block_dirty_bitmap_free_backup, | |
1888 | .clean = g_free, | |
1889 | }; | |
1890 | ||
1891 | static void block_dirty_bitmap_clear_action(BlockDirtyBitmap *action, | |
1892 | Transaction *tran, Error **errp) | |
1893 | { | |
1894 | BlockDirtyBitmapState *state = g_new0(BlockDirtyBitmapState, 1); | |
1895 | ||
1896 | tran_add(tran, &block_dirty_bitmap_clear_drv, state); | |
1897 | ||
1898 | state->bitmap = block_dirty_bitmap_lookup(action->node, | |
1899 | action->name, | |
1900 | &state->bs, | |
1901 | errp); | |
1902 | if (!state->bitmap) { | |
1903 | return; | |
1904 | } | |
1905 | ||
1906 | if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_DEFAULT, errp)) { | |
1907 | return; | |
1908 | } | |
1909 | ||
1910 | bdrv_clear_dirty_bitmap(state->bitmap, &state->backup); | |
1911 | } | |
1912 | ||
1913 | static void block_dirty_bitmap_restore(void *opaque) | |
1914 | { | |
1915 | BlockDirtyBitmapState *state = opaque; | |
1916 | ||
1917 | if (state->backup) { | |
1918 | bdrv_restore_dirty_bitmap(state->bitmap, state->backup); | |
1919 | } | |
1920 | } | |
1921 | ||
1922 | static void block_dirty_bitmap_free_backup(void *opaque) | |
1923 | { | |
1924 | BlockDirtyBitmapState *state = opaque; | |
1925 | ||
1926 | hbitmap_free(state->backup); | |
1927 | } | |
1928 | ||
1929 | static void block_dirty_bitmap_enable_abort(void *opaque); | |
1930 | TransactionActionDrv block_dirty_bitmap_enable_drv = { | |
1931 | .abort = block_dirty_bitmap_enable_abort, | |
1932 | .clean = g_free, | |
1933 | }; | |
1934 | ||
1935 | static void block_dirty_bitmap_enable_action(BlockDirtyBitmap *action, | |
1936 | Transaction *tran, Error **errp) | |
1937 | { | |
1938 | BlockDirtyBitmapState *state = g_new0(BlockDirtyBitmapState, 1); | |
1939 | ||
1940 | tran_add(tran, &block_dirty_bitmap_enable_drv, state); | |
1941 | ||
1942 | state->bitmap = block_dirty_bitmap_lookup(action->node, | |
1943 | action->name, | |
1944 | NULL, | |
1945 | errp); | |
1946 | if (!state->bitmap) { | |
1947 | return; | |
1948 | } | |
1949 | ||
1950 | if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_ALLOW_RO, errp)) { | |
1951 | return; | |
1952 | } | |
1953 | ||
1954 | state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap); | |
1955 | bdrv_enable_dirty_bitmap(state->bitmap); | |
1956 | } | |
1957 | ||
1958 | static void block_dirty_bitmap_enable_abort(void *opaque) | |
1959 | { | |
1960 | BlockDirtyBitmapState *state = opaque; | |
1961 | ||
1962 | if (!state->was_enabled) { | |
1963 | bdrv_disable_dirty_bitmap(state->bitmap); | |
1964 | } | |
1965 | } | |
1966 | ||
1967 | static void block_dirty_bitmap_disable_abort(void *opaque); | |
1968 | TransactionActionDrv block_dirty_bitmap_disable_drv = { | |
1969 | .abort = block_dirty_bitmap_disable_abort, | |
1970 | .clean = g_free, | |
1971 | }; | |
1972 | ||
1973 | static void block_dirty_bitmap_disable_action(BlockDirtyBitmap *action, | |
1974 | Transaction *tran, Error **errp) | |
1975 | { | |
1976 | BlockDirtyBitmapState *state = g_new0(BlockDirtyBitmapState, 1); | |
1977 | ||
1978 | tran_add(tran, &block_dirty_bitmap_disable_drv, state); | |
1979 | ||
1980 | state->bitmap = block_dirty_bitmap_lookup(action->node, | |
1981 | action->name, | |
1982 | NULL, | |
1983 | errp); | |
1984 | if (!state->bitmap) { | |
1985 | return; | |
1986 | } | |
1987 | ||
1988 | if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_ALLOW_RO, errp)) { | |
1989 | return; | |
1990 | } | |
1991 | ||
1992 | state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap); | |
1993 | bdrv_disable_dirty_bitmap(state->bitmap); | |
1994 | } | |
1995 | ||
1996 | static void block_dirty_bitmap_disable_abort(void *opaque) | |
1997 | { | |
1998 | BlockDirtyBitmapState *state = opaque; | |
1999 | ||
2000 | if (state->was_enabled) { | |
2001 | bdrv_enable_dirty_bitmap(state->bitmap); | |
2002 | } | |
2003 | } | |
2004 | ||
2005 | TransactionActionDrv block_dirty_bitmap_merge_drv = { | |
2006 | .commit = block_dirty_bitmap_free_backup, | |
2007 | .abort = block_dirty_bitmap_restore, | |
2008 | .clean = g_free, | |
2009 | }; | |
2010 | ||
2011 | static void block_dirty_bitmap_merge_action(BlockDirtyBitmapMerge *action, | |
2012 | Transaction *tran, Error **errp) | |
2013 | { | |
2014 | BlockDirtyBitmapState *state = g_new0(BlockDirtyBitmapState, 1); | |
2015 | ||
2016 | tran_add(tran, &block_dirty_bitmap_merge_drv, state); | |
2017 | ||
2018 | state->bitmap = block_dirty_bitmap_merge(action->node, action->target, | |
2019 | action->bitmaps, &state->backup, | |
2020 | errp); | |
2021 | } | |
2022 | ||
2023 | static void block_dirty_bitmap_remove_commit(void *opaque); | |
2024 | static void block_dirty_bitmap_remove_abort(void *opaque); | |
2025 | TransactionActionDrv block_dirty_bitmap_remove_drv = { | |
2026 | .commit = block_dirty_bitmap_remove_commit, | |
2027 | .abort = block_dirty_bitmap_remove_abort, | |
2028 | .clean = g_free, | |
2029 | }; | |
2030 | ||
2031 | static void block_dirty_bitmap_remove_action(BlockDirtyBitmap *action, | |
2032 | Transaction *tran, Error **errp) | |
2033 | { | |
2034 | BlockDirtyBitmapState *state = g_new0(BlockDirtyBitmapState, 1); | |
2035 | ||
2036 | tran_add(tran, &block_dirty_bitmap_remove_drv, state); | |
2037 | ||
2038 | ||
2039 | state->bitmap = block_dirty_bitmap_remove(action->node, action->name, | |
2040 | false, &state->bs, errp); | |
2041 | if (state->bitmap) { | |
2042 | bdrv_dirty_bitmap_skip_store(state->bitmap, true); | |
2043 | bdrv_dirty_bitmap_set_busy(state->bitmap, true); | |
2044 | } | |
2045 | } | |
2046 | ||
2047 | static void block_dirty_bitmap_remove_abort(void *opaque) | |
2048 | { | |
2049 | BlockDirtyBitmapState *state = opaque; | |
2050 | ||
2051 | if (state->bitmap) { | |
2052 | bdrv_dirty_bitmap_skip_store(state->bitmap, false); | |
2053 | bdrv_dirty_bitmap_set_busy(state->bitmap, false); | |
2054 | } | |
2055 | } | |
2056 | ||
2057 | static void block_dirty_bitmap_remove_commit(void *opaque) | |
2058 | { | |
2059 | BlockDirtyBitmapState *state = opaque; | |
2060 | ||
2061 | bdrv_dirty_bitmap_set_busy(state->bitmap, false); | |
2062 | bdrv_release_dirty_bitmap(state->bitmap); | |
2063 | } | |
2064 | ||
2065 | static void abort_commit(void *opaque); | |
2066 | TransactionActionDrv abort_drv = { | |
2067 | .commit = abort_commit, | |
2068 | }; | |
2069 | ||
2070 | static void abort_action(Transaction *tran, Error **errp) | |
2071 | { | |
2072 | tran_add(tran, &abort_drv, NULL); | |
2073 | error_setg(errp, "Transaction aborted using Abort action"); | |
2074 | } | |
2075 | ||
2076 | static void abort_commit(void *opaque) | |
2077 | { | |
2078 | g_assert_not_reached(); /* this action never succeeds */ | |
2079 | } | |
2080 | ||
2081 | static void transaction_action(TransactionAction *act, JobTxn *block_job_txn, | |
2082 | Transaction *tran, Error **errp) | |
2083 | { | |
2084 | switch (act->type) { | |
2085 | case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT: | |
2086 | case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC: | |
2087 | external_snapshot_action(act, tran, errp); | |
2088 | return; | |
2089 | case TRANSACTION_ACTION_KIND_DRIVE_BACKUP: | |
2090 | drive_backup_action(act->u.drive_backup.data, | |
2091 | block_job_txn, tran, errp); | |
2092 | return; | |
2093 | case TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP: | |
2094 | blockdev_backup_action(act->u.blockdev_backup.data, | |
2095 | block_job_txn, tran, errp); | |
2096 | return; | |
2097 | case TRANSACTION_ACTION_KIND_ABORT: | |
2098 | abort_action(tran, errp); | |
2099 | return; | |
2100 | case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC: | |
2101 | internal_snapshot_action(act->u.blockdev_snapshot_internal_sync.data, | |
2102 | tran, errp); | |
2103 | return; | |
2104 | case TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD: | |
2105 | block_dirty_bitmap_add_action(act->u.block_dirty_bitmap_add.data, | |
2106 | tran, errp); | |
2107 | return; | |
2108 | case TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR: | |
2109 | block_dirty_bitmap_clear_action(act->u.block_dirty_bitmap_clear.data, | |
2110 | tran, errp); | |
2111 | return; | |
2112 | case TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ENABLE: | |
2113 | block_dirty_bitmap_enable_action(act->u.block_dirty_bitmap_enable.data, | |
2114 | tran, errp); | |
2115 | return; | |
2116 | case TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_DISABLE: | |
2117 | block_dirty_bitmap_disable_action( | |
2118 | act->u.block_dirty_bitmap_disable.data, tran, errp); | |
2119 | return; | |
2120 | case TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_MERGE: | |
2121 | block_dirty_bitmap_merge_action(act->u.block_dirty_bitmap_merge.data, | |
2122 | tran, errp); | |
2123 | return; | |
2124 | case TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_REMOVE: | |
2125 | block_dirty_bitmap_remove_action(act->u.block_dirty_bitmap_remove.data, | |
2126 | tran, errp); | |
2127 | return; | |
2128 | /* | |
2129 | * Where are transactions for MIRROR, COMMIT and STREAM? | |
2130 | * Although these blockjobs use transaction callbacks like the backup job, | |
2131 | * these jobs do not necessarily adhere to transaction semantics. | |
2132 | * These jobs may not fully undo all of their actions on abort, nor do they | |
2133 | * necessarily work in transactions with more than one job in them. | |
2134 | */ | |
2135 | case TRANSACTION_ACTION_KIND__MAX: | |
2136 | default: | |
2137 | g_assert_not_reached(); | |
2138 | }; | |
2139 | } | |
2140 | ||
2141 | ||
2142 | /* | |
2143 | * 'Atomic' group operations. The operations are performed as a set, and if | |
2144 | * any fail then we roll back all operations in the group. | |
2145 | * | |
2146 | * Always run under BQL. | |
2147 | */ | |
2148 | void qmp_transaction(TransactionActionList *actions, | |
2149 | struct TransactionProperties *properties, | |
2150 | Error **errp) | |
2151 | { | |
2152 | TransactionActionList *act; | |
2153 | JobTxn *block_job_txn = NULL; | |
2154 | Error *local_err = NULL; | |
2155 | Transaction *tran; | |
2156 | ActionCompletionMode comp_mode = | |
2157 | properties ? properties->completion_mode : | |
2158 | ACTION_COMPLETION_MODE_INDIVIDUAL; | |
2159 | ||
2160 | GLOBAL_STATE_CODE(); | |
2161 | ||
2162 | /* Does this transaction get canceled as a group on failure? | |
2163 | * If not, we don't really need to make a JobTxn. | |
2164 | */ | |
2165 | if (comp_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) { | |
2166 | for (act = actions; act; act = act->next) { | |
2167 | TransactionActionKind type = act->value->type; | |
2168 | ||
2169 | if (type != TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP && | |
2170 | type != TRANSACTION_ACTION_KIND_DRIVE_BACKUP) | |
2171 | { | |
2172 | error_setg(errp, | |
2173 | "Action '%s' does not support transaction property " | |
2174 | "completion-mode = %s", | |
2175 | TransactionActionKind_str(type), | |
2176 | ActionCompletionMode_str(comp_mode)); | |
2177 | return; | |
2178 | } | |
2179 | } | |
2180 | ||
2181 | block_job_txn = job_txn_new(); | |
2182 | } | |
2183 | ||
2184 | /* drain all i/o before any operations */ | |
2185 | bdrv_drain_all(); | |
2186 | ||
2187 | tran = tran_new(); | |
2188 | ||
2189 | /* We don't do anything in this loop that commits us to the operations */ | |
2190 | for (act = actions; act; act = act->next) { | |
2191 | transaction_action(act->value, block_job_txn, tran, &local_err); | |
2192 | if (local_err) { | |
2193 | error_propagate(errp, local_err); | |
2194 | goto delete_and_fail; | |
2195 | } | |
2196 | } | |
2197 | ||
2198 | tran_commit(tran); | |
2199 | ||
2200 | /* success */ | |
2201 | goto exit; | |
2202 | ||
2203 | delete_and_fail: | |
2204 | /* failure, and it is all-or-none; roll back all operations */ | |
2205 | tran_abort(tran); | |
2206 | exit: | |
2207 | job_txn_unref(block_job_txn); | |
2208 | } | |
2209 | ||
2210 | BlockDirtyBitmapSha256 *qmp_x_debug_block_dirty_bitmap_sha256(const char *node, | |
2211 | const char *name, | |
2212 | Error **errp) | |
2213 | { | |
2214 | BdrvDirtyBitmap *bitmap; | |
2215 | BlockDriverState *bs; | |
2216 | BlockDirtyBitmapSha256 *ret = NULL; | |
2217 | char *sha256; | |
2218 | ||
2219 | bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp); | |
2220 | if (!bitmap || !bs) { | |
2221 | return NULL; | |
2222 | } | |
2223 | ||
2224 | sha256 = bdrv_dirty_bitmap_sha256(bitmap, errp); | |
2225 | if (sha256 == NULL) { | |
2226 | return NULL; | |
2227 | } | |
2228 | ||
2229 | ret = g_new(BlockDirtyBitmapSha256, 1); | |
2230 | ret->sha256 = sha256; | |
2231 | ||
2232 | return ret; | |
2233 | } | |
2234 | ||
2235 | void coroutine_fn qmp_block_resize(const char *device, const char *node_name, | |
2236 | int64_t size, Error **errp) | |
2237 | { | |
2238 | Error *local_err = NULL; | |
2239 | BlockBackend *blk; | |
2240 | BlockDriverState *bs; | |
2241 | AioContext *old_ctx; | |
2242 | ||
2243 | bs = bdrv_lookup_bs(device, node_name, &local_err); | |
2244 | if (local_err) { | |
2245 | error_propagate(errp, local_err); | |
2246 | return; | |
2247 | } | |
2248 | ||
2249 | if (size < 0) { | |
2250 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); | |
2251 | return; | |
2252 | } | |
2253 | ||
2254 | bdrv_graph_co_rdlock(); | |
2255 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) { | |
2256 | error_setg(errp, QERR_DEVICE_IN_USE, device); | |
2257 | bdrv_graph_co_rdunlock(); | |
2258 | return; | |
2259 | } | |
2260 | bdrv_graph_co_rdunlock(); | |
2261 | ||
2262 | blk = blk_co_new_with_bs(bs, BLK_PERM_RESIZE, BLK_PERM_ALL, errp); | |
2263 | if (!blk) { | |
2264 | return; | |
2265 | } | |
2266 | ||
2267 | bdrv_drained_begin(bs); | |
2268 | ||
2269 | old_ctx = bdrv_co_enter(bs); | |
2270 | blk_co_truncate(blk, size, false, PREALLOC_MODE_OFF, 0, errp); | |
2271 | bdrv_co_leave(bs, old_ctx); | |
2272 | ||
2273 | bdrv_drained_end(bs); | |
2274 | blk_co_unref(blk); | |
2275 | } | |
2276 | ||
2277 | void qmp_block_stream(const char *job_id, const char *device, | |
2278 | const char *base, | |
2279 | const char *base_node, | |
2280 | const char *backing_file, | |
2281 | const char *bottom, | |
2282 | bool has_speed, int64_t speed, | |
2283 | bool has_on_error, BlockdevOnError on_error, | |
2284 | const char *filter_node_name, | |
2285 | bool has_auto_finalize, bool auto_finalize, | |
2286 | bool has_auto_dismiss, bool auto_dismiss, | |
2287 | Error **errp) | |
2288 | { | |
2289 | BlockDriverState *bs, *iter, *iter_end; | |
2290 | BlockDriverState *base_bs = NULL; | |
2291 | BlockDriverState *bottom_bs = NULL; | |
2292 | AioContext *aio_context; | |
2293 | Error *local_err = NULL; | |
2294 | int job_flags = JOB_DEFAULT; | |
2295 | ||
2296 | GLOBAL_STATE_CODE(); | |
2297 | ||
2298 | if (base && base_node) { | |
2299 | error_setg(errp, "'base' and 'base-node' cannot be specified " | |
2300 | "at the same time"); | |
2301 | return; | |
2302 | } | |
2303 | ||
2304 | if (base && bottom) { | |
2305 | error_setg(errp, "'base' and 'bottom' cannot be specified " | |
2306 | "at the same time"); | |
2307 | return; | |
2308 | } | |
2309 | ||
2310 | if (bottom && base_node) { | |
2311 | error_setg(errp, "'bottom' and 'base-node' cannot be specified " | |
2312 | "at the same time"); | |
2313 | return; | |
2314 | } | |
2315 | ||
2316 | if (!has_on_error) { | |
2317 | on_error = BLOCKDEV_ON_ERROR_REPORT; | |
2318 | } | |
2319 | ||
2320 | bs = bdrv_lookup_bs(device, device, errp); | |
2321 | if (!bs) { | |
2322 | return; | |
2323 | } | |
2324 | ||
2325 | aio_context = bdrv_get_aio_context(bs); | |
2326 | ||
2327 | bdrv_graph_rdlock_main_loop(); | |
2328 | if (base) { | |
2329 | base_bs = bdrv_find_backing_image(bs, base); | |
2330 | if (base_bs == NULL) { | |
2331 | error_setg(errp, "Can't find '%s' in the backing chain", base); | |
2332 | goto out_rdlock; | |
2333 | } | |
2334 | assert(bdrv_get_aio_context(base_bs) == aio_context); | |
2335 | } | |
2336 | ||
2337 | if (base_node) { | |
2338 | base_bs = bdrv_lookup_bs(NULL, base_node, errp); | |
2339 | if (!base_bs) { | |
2340 | goto out_rdlock; | |
2341 | } | |
2342 | if (bs == base_bs || !bdrv_chain_contains(bs, base_bs)) { | |
2343 | error_setg(errp, "Node '%s' is not a backing image of '%s'", | |
2344 | base_node, device); | |
2345 | goto out_rdlock; | |
2346 | } | |
2347 | assert(bdrv_get_aio_context(base_bs) == aio_context); | |
2348 | ||
2349 | bdrv_refresh_filename(base_bs); | |
2350 | } | |
2351 | ||
2352 | if (bottom) { | |
2353 | bottom_bs = bdrv_lookup_bs(NULL, bottom, errp); | |
2354 | if (!bottom_bs) { | |
2355 | goto out_rdlock; | |
2356 | } | |
2357 | if (!bottom_bs->drv) { | |
2358 | error_setg(errp, "Node '%s' is not open", bottom); | |
2359 | goto out_rdlock; | |
2360 | } | |
2361 | if (bottom_bs->drv->is_filter) { | |
2362 | error_setg(errp, "Node '%s' is a filter, use a non-filter node " | |
2363 | "as 'bottom'", bottom); | |
2364 | goto out_rdlock; | |
2365 | } | |
2366 | if (!bdrv_chain_contains(bs, bottom_bs)) { | |
2367 | error_setg(errp, "Node '%s' is not in a chain starting from '%s'", | |
2368 | bottom, device); | |
2369 | goto out_rdlock; | |
2370 | } | |
2371 | assert(bdrv_get_aio_context(bottom_bs) == aio_context); | |
2372 | } | |
2373 | ||
2374 | /* | |
2375 | * Check for op blockers in the whole chain between bs and base (or bottom) | |
2376 | */ | |
2377 | iter_end = bottom ? bdrv_filter_or_cow_bs(bottom_bs) : base_bs; | |
2378 | for (iter = bs; iter && iter != iter_end; | |
2379 | iter = bdrv_filter_or_cow_bs(iter)) | |
2380 | { | |
2381 | if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_STREAM, errp)) { | |
2382 | goto out_rdlock; | |
2383 | } | |
2384 | } | |
2385 | bdrv_graph_rdunlock_main_loop(); | |
2386 | ||
2387 | /* if we are streaming the entire chain, the result will have no backing | |
2388 | * file, and specifying one is therefore an error */ | |
2389 | if (!base_bs && backing_file) { | |
2390 | error_setg(errp, "backing file specified, but streaming the " | |
2391 | "entire chain"); | |
2392 | return; | |
2393 | } | |
2394 | ||
2395 | if (has_auto_finalize && !auto_finalize) { | |
2396 | job_flags |= JOB_MANUAL_FINALIZE; | |
2397 | } | |
2398 | if (has_auto_dismiss && !auto_dismiss) { | |
2399 | job_flags |= JOB_MANUAL_DISMISS; | |
2400 | } | |
2401 | ||
2402 | stream_start(job_id, bs, base_bs, backing_file, | |
2403 | bottom_bs, job_flags, has_speed ? speed : 0, on_error, | |
2404 | filter_node_name, &local_err); | |
2405 | if (local_err) { | |
2406 | error_propagate(errp, local_err); | |
2407 | return; | |
2408 | } | |
2409 | ||
2410 | trace_qmp_block_stream(bs); | |
2411 | return; | |
2412 | ||
2413 | out_rdlock: | |
2414 | bdrv_graph_rdunlock_main_loop(); | |
2415 | } | |
2416 | ||
2417 | void qmp_block_commit(const char *job_id, const char *device, | |
2418 | const char *base_node, | |
2419 | const char *base, | |
2420 | const char *top_node, | |
2421 | const char *top, | |
2422 | const char *backing_file, | |
2423 | bool has_speed, int64_t speed, | |
2424 | bool has_on_error, BlockdevOnError on_error, | |
2425 | const char *filter_node_name, | |
2426 | bool has_auto_finalize, bool auto_finalize, | |
2427 | bool has_auto_dismiss, bool auto_dismiss, | |
2428 | Error **errp) | |
2429 | { | |
2430 | BlockDriverState *bs; | |
2431 | BlockDriverState *iter; | |
2432 | BlockDriverState *base_bs, *top_bs; | |
2433 | AioContext *aio_context; | |
2434 | Error *local_err = NULL; | |
2435 | int job_flags = JOB_DEFAULT; | |
2436 | uint64_t top_perm, top_shared; | |
2437 | ||
2438 | /* TODO We'll eventually have to take a writer lock in this function */ | |
2439 | GRAPH_RDLOCK_GUARD_MAINLOOP(); | |
2440 | ||
2441 | if (!has_speed) { | |
2442 | speed = 0; | |
2443 | } | |
2444 | if (!has_on_error) { | |
2445 | on_error = BLOCKDEV_ON_ERROR_REPORT; | |
2446 | } | |
2447 | if (has_auto_finalize && !auto_finalize) { | |
2448 | job_flags |= JOB_MANUAL_FINALIZE; | |
2449 | } | |
2450 | if (has_auto_dismiss && !auto_dismiss) { | |
2451 | job_flags |= JOB_MANUAL_DISMISS; | |
2452 | } | |
2453 | ||
2454 | /* Important Note: | |
2455 | * libvirt relies on the DeviceNotFound error class in order to probe for | |
2456 | * live commit feature versions; for this to work, we must make sure to | |
2457 | * perform the device lookup before any generic errors that may occur in a | |
2458 | * scenario in which all optional arguments are omitted. */ | |
2459 | bs = qmp_get_root_bs(device, &local_err); | |
2460 | if (!bs) { | |
2461 | bs = bdrv_lookup_bs(device, device, NULL); | |
2462 | if (!bs) { | |
2463 | error_free(local_err); | |
2464 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
2465 | "Device '%s' not found", device); | |
2466 | } else { | |
2467 | error_propagate(errp, local_err); | |
2468 | } | |
2469 | return; | |
2470 | } | |
2471 | ||
2472 | aio_context = bdrv_get_aio_context(bs); | |
2473 | ||
2474 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, errp)) { | |
2475 | return; | |
2476 | } | |
2477 | ||
2478 | /* default top_bs is the active layer */ | |
2479 | top_bs = bs; | |
2480 | ||
2481 | if (top_node && top) { | |
2482 | error_setg(errp, "'top-node' and 'top' are mutually exclusive"); | |
2483 | return; | |
2484 | } else if (top_node) { | |
2485 | top_bs = bdrv_lookup_bs(NULL, top_node, errp); | |
2486 | if (top_bs == NULL) { | |
2487 | return; | |
2488 | } | |
2489 | if (!bdrv_chain_contains(bs, top_bs)) { | |
2490 | error_setg(errp, "'%s' is not in this backing file chain", | |
2491 | top_node); | |
2492 | return; | |
2493 | } | |
2494 | } else if (top) { | |
2495 | /* This strcmp() is just a shortcut, there is no need to | |
2496 | * refresh @bs's filename. If it mismatches, | |
2497 | * bdrv_find_backing_image() will do the refresh and may still | |
2498 | * return @bs. */ | |
2499 | if (strcmp(bs->filename, top) != 0) { | |
2500 | top_bs = bdrv_find_backing_image(bs, top); | |
2501 | } | |
2502 | } | |
2503 | ||
2504 | if (top_bs == NULL) { | |
2505 | error_setg(errp, "Top image file %s not found", top ? top : "NULL"); | |
2506 | return; | |
2507 | } | |
2508 | ||
2509 | assert(bdrv_get_aio_context(top_bs) == aio_context); | |
2510 | ||
2511 | if (base_node && base) { | |
2512 | error_setg(errp, "'base-node' and 'base' are mutually exclusive"); | |
2513 | return; | |
2514 | } else if (base_node) { | |
2515 | base_bs = bdrv_lookup_bs(NULL, base_node, errp); | |
2516 | if (base_bs == NULL) { | |
2517 | return; | |
2518 | } | |
2519 | if (!bdrv_chain_contains(top_bs, base_bs)) { | |
2520 | error_setg(errp, "'%s' is not in this backing file chain", | |
2521 | base_node); | |
2522 | return; | |
2523 | } | |
2524 | } else if (base) { | |
2525 | base_bs = bdrv_find_backing_image(top_bs, base); | |
2526 | if (base_bs == NULL) { | |
2527 | error_setg(errp, "Can't find '%s' in the backing chain", base); | |
2528 | return; | |
2529 | } | |
2530 | } else { | |
2531 | base_bs = bdrv_find_base(top_bs); | |
2532 | if (base_bs == NULL) { | |
2533 | error_setg(errp, "There is no backimg image"); | |
2534 | return; | |
2535 | } | |
2536 | } | |
2537 | ||
2538 | assert(bdrv_get_aio_context(base_bs) == aio_context); | |
2539 | ||
2540 | for (iter = top_bs; iter != bdrv_filter_or_cow_bs(base_bs); | |
2541 | iter = bdrv_filter_or_cow_bs(iter)) | |
2542 | { | |
2543 | if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) { | |
2544 | return; | |
2545 | } | |
2546 | } | |
2547 | ||
2548 | /* Do not allow attempts to commit an image into itself */ | |
2549 | if (top_bs == base_bs) { | |
2550 | error_setg(errp, "cannot commit an image into itself"); | |
2551 | return; | |
2552 | } | |
2553 | ||
2554 | /* | |
2555 | * Active commit is required if and only if someone has taken a | |
2556 | * WRITE permission on the top node. Historically, we have always | |
2557 | * used active commit for top nodes, so continue that practice | |
2558 | * lest we possibly break clients that rely on this behavior, e.g. | |
2559 | * to later attach this node to a writing parent. | |
2560 | * (Active commit is never really wrong.) | |
2561 | */ | |
2562 | bdrv_get_cumulative_perm(top_bs, &top_perm, &top_shared); | |
2563 | if (top_perm & BLK_PERM_WRITE || | |
2564 | bdrv_skip_filters(top_bs) == bdrv_skip_filters(bs)) | |
2565 | { | |
2566 | if (backing_file) { | |
2567 | if (bdrv_skip_filters(top_bs) == bdrv_skip_filters(bs)) { | |
2568 | error_setg(errp, "'backing-file' specified," | |
2569 | " but 'top' is the active layer"); | |
2570 | } else { | |
2571 | error_setg(errp, "'backing-file' specified, but 'top' has a " | |
2572 | "writer on it"); | |
2573 | } | |
2574 | return; | |
2575 | } | |
2576 | if (!job_id) { | |
2577 | /* | |
2578 | * Emulate here what block_job_create() does, because it | |
2579 | * is possible that @bs != @top_bs (the block job should | |
2580 | * be named after @bs, even if @top_bs is the actual | |
2581 | * source) | |
2582 | */ | |
2583 | job_id = bdrv_get_device_name(bs); | |
2584 | } | |
2585 | commit_active_start(job_id, top_bs, base_bs, job_flags, speed, on_error, | |
2586 | filter_node_name, NULL, NULL, false, &local_err); | |
2587 | } else { | |
2588 | BlockDriverState *overlay_bs = bdrv_find_overlay(bs, top_bs); | |
2589 | if (bdrv_op_is_blocked(overlay_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) { | |
2590 | return; | |
2591 | } | |
2592 | commit_start(job_id, bs, base_bs, top_bs, job_flags, | |
2593 | speed, on_error, backing_file, | |
2594 | filter_node_name, &local_err); | |
2595 | } | |
2596 | if (local_err != NULL) { | |
2597 | error_propagate(errp, local_err); | |
2598 | return; | |
2599 | } | |
2600 | } | |
2601 | ||
2602 | /* Common QMP interface for drive-backup and blockdev-backup */ | |
2603 | static BlockJob *do_backup_common(BackupCommon *backup, | |
2604 | BlockDriverState *bs, | |
2605 | BlockDriverState *target_bs, | |
2606 | AioContext *aio_context, | |
2607 | JobTxn *txn, Error **errp) | |
2608 | { | |
2609 | BlockJob *job = NULL; | |
2610 | BdrvDirtyBitmap *bmap = NULL; | |
2611 | BackupPerf perf = { .max_workers = 64 }; | |
2612 | int job_flags = JOB_DEFAULT; | |
2613 | ||
2614 | if (!backup->has_speed) { | |
2615 | backup->speed = 0; | |
2616 | } | |
2617 | if (!backup->has_on_source_error) { | |
2618 | backup->on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
2619 | } | |
2620 | if (!backup->has_on_target_error) { | |
2621 | backup->on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
2622 | } | |
2623 | if (!backup->has_auto_finalize) { | |
2624 | backup->auto_finalize = true; | |
2625 | } | |
2626 | if (!backup->has_auto_dismiss) { | |
2627 | backup->auto_dismiss = true; | |
2628 | } | |
2629 | if (!backup->has_compress) { | |
2630 | backup->compress = false; | |
2631 | } | |
2632 | ||
2633 | if (backup->x_perf) { | |
2634 | if (backup->x_perf->has_use_copy_range) { | |
2635 | perf.use_copy_range = backup->x_perf->use_copy_range; | |
2636 | } | |
2637 | if (backup->x_perf->has_max_workers) { | |
2638 | perf.max_workers = backup->x_perf->max_workers; | |
2639 | } | |
2640 | if (backup->x_perf->has_max_chunk) { | |
2641 | perf.max_chunk = backup->x_perf->max_chunk; | |
2642 | } | |
2643 | } | |
2644 | ||
2645 | if ((backup->sync == MIRROR_SYNC_MODE_BITMAP) || | |
2646 | (backup->sync == MIRROR_SYNC_MODE_INCREMENTAL)) { | |
2647 | /* done before desugaring 'incremental' to print the right message */ | |
2648 | if (!backup->bitmap) { | |
2649 | error_setg(errp, "must provide a valid bitmap name for " | |
2650 | "'%s' sync mode", MirrorSyncMode_str(backup->sync)); | |
2651 | return NULL; | |
2652 | } | |
2653 | } | |
2654 | ||
2655 | if (backup->sync == MIRROR_SYNC_MODE_INCREMENTAL) { | |
2656 | if (backup->has_bitmap_mode && | |
2657 | backup->bitmap_mode != BITMAP_SYNC_MODE_ON_SUCCESS) { | |
2658 | error_setg(errp, "Bitmap sync mode must be '%s' " | |
2659 | "when using sync mode '%s'", | |
2660 | BitmapSyncMode_str(BITMAP_SYNC_MODE_ON_SUCCESS), | |
2661 | MirrorSyncMode_str(backup->sync)); | |
2662 | return NULL; | |
2663 | } | |
2664 | backup->has_bitmap_mode = true; | |
2665 | backup->sync = MIRROR_SYNC_MODE_BITMAP; | |
2666 | backup->bitmap_mode = BITMAP_SYNC_MODE_ON_SUCCESS; | |
2667 | } | |
2668 | ||
2669 | if (backup->bitmap) { | |
2670 | bmap = bdrv_find_dirty_bitmap(bs, backup->bitmap); | |
2671 | if (!bmap) { | |
2672 | error_setg(errp, "Bitmap '%s' could not be found", backup->bitmap); | |
2673 | return NULL; | |
2674 | } | |
2675 | if (!backup->has_bitmap_mode) { | |
2676 | error_setg(errp, "Bitmap sync mode must be given " | |
2677 | "when providing a bitmap"); | |
2678 | return NULL; | |
2679 | } | |
2680 | if (bdrv_dirty_bitmap_check(bmap, BDRV_BITMAP_ALLOW_RO, errp)) { | |
2681 | return NULL; | |
2682 | } | |
2683 | ||
2684 | /* This does not produce a useful bitmap artifact: */ | |
2685 | if (backup->sync == MIRROR_SYNC_MODE_NONE) { | |
2686 | error_setg(errp, "sync mode '%s' does not produce meaningful bitmap" | |
2687 | " outputs", MirrorSyncMode_str(backup->sync)); | |
2688 | return NULL; | |
2689 | } | |
2690 | ||
2691 | /* If the bitmap isn't used for input or output, this is useless: */ | |
2692 | if (backup->bitmap_mode == BITMAP_SYNC_MODE_NEVER && | |
2693 | backup->sync != MIRROR_SYNC_MODE_BITMAP) { | |
2694 | error_setg(errp, "Bitmap sync mode '%s' has no meaningful effect" | |
2695 | " when combined with sync mode '%s'", | |
2696 | BitmapSyncMode_str(backup->bitmap_mode), | |
2697 | MirrorSyncMode_str(backup->sync)); | |
2698 | return NULL; | |
2699 | } | |
2700 | } | |
2701 | ||
2702 | if (!backup->bitmap && backup->has_bitmap_mode) { | |
2703 | error_setg(errp, "Cannot specify bitmap sync mode without a bitmap"); | |
2704 | return NULL; | |
2705 | } | |
2706 | ||
2707 | if (!backup->auto_finalize) { | |
2708 | job_flags |= JOB_MANUAL_FINALIZE; | |
2709 | } | |
2710 | if (!backup->auto_dismiss) { | |
2711 | job_flags |= JOB_MANUAL_DISMISS; | |
2712 | } | |
2713 | ||
2714 | job = backup_job_create(backup->job_id, bs, target_bs, backup->speed, | |
2715 | backup->sync, bmap, backup->bitmap_mode, | |
2716 | backup->compress, | |
2717 | backup->filter_node_name, | |
2718 | &perf, | |
2719 | backup->on_source_error, | |
2720 | backup->on_target_error, | |
2721 | job_flags, NULL, NULL, txn, errp); | |
2722 | return job; | |
2723 | } | |
2724 | ||
2725 | void qmp_drive_backup(DriveBackup *backup, Error **errp) | |
2726 | { | |
2727 | TransactionAction action = { | |
2728 | .type = TRANSACTION_ACTION_KIND_DRIVE_BACKUP, | |
2729 | .u.drive_backup.data = backup, | |
2730 | }; | |
2731 | blockdev_do_action(&action, errp); | |
2732 | } | |
2733 | ||
2734 | BlockDeviceInfoList *qmp_query_named_block_nodes(bool has_flat, | |
2735 | bool flat, | |
2736 | Error **errp) | |
2737 | { | |
2738 | bool return_flat = has_flat && flat; | |
2739 | ||
2740 | return bdrv_named_nodes_list(return_flat, errp); | |
2741 | } | |
2742 | ||
2743 | XDbgBlockGraph *qmp_x_debug_query_block_graph(Error **errp) | |
2744 | { | |
2745 | GRAPH_RDLOCK_GUARD_MAINLOOP(); | |
2746 | ||
2747 | return bdrv_get_xdbg_block_graph(errp); | |
2748 | } | |
2749 | ||
2750 | void qmp_blockdev_backup(BlockdevBackup *backup, Error **errp) | |
2751 | { | |
2752 | TransactionAction action = { | |
2753 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP, | |
2754 | .u.blockdev_backup.data = backup, | |
2755 | }; | |
2756 | blockdev_do_action(&action, errp); | |
2757 | } | |
2758 | ||
2759 | /* Parameter check and block job starting for drive mirroring. | |
2760 | * Caller should hold @device and @target's aio context (must be the same). | |
2761 | **/ | |
2762 | static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs, | |
2763 | BlockDriverState *target, | |
2764 | const char *replaces, | |
2765 | enum MirrorSyncMode sync, | |
2766 | BlockMirrorBackingMode backing_mode, | |
2767 | bool zero_target, | |
2768 | bool has_speed, int64_t speed, | |
2769 | bool has_granularity, uint32_t granularity, | |
2770 | bool has_buf_size, int64_t buf_size, | |
2771 | bool has_on_source_error, | |
2772 | BlockdevOnError on_source_error, | |
2773 | bool has_on_target_error, | |
2774 | BlockdevOnError on_target_error, | |
2775 | bool has_unmap, bool unmap, | |
2776 | const char *filter_node_name, | |
2777 | bool has_copy_mode, MirrorCopyMode copy_mode, | |
2778 | bool has_auto_finalize, bool auto_finalize, | |
2779 | bool has_auto_dismiss, bool auto_dismiss, | |
2780 | Error **errp) | |
2781 | { | |
2782 | BlockDriverState *unfiltered_bs; | |
2783 | int job_flags = JOB_DEFAULT; | |
2784 | ||
2785 | GLOBAL_STATE_CODE(); | |
2786 | GRAPH_RDLOCK_GUARD_MAINLOOP(); | |
2787 | ||
2788 | if (!has_speed) { | |
2789 | speed = 0; | |
2790 | } | |
2791 | if (!has_on_source_error) { | |
2792 | on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
2793 | } | |
2794 | if (!has_on_target_error) { | |
2795 | on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
2796 | } | |
2797 | if (!has_granularity) { | |
2798 | granularity = 0; | |
2799 | } | |
2800 | if (!has_buf_size) { | |
2801 | buf_size = 0; | |
2802 | } | |
2803 | if (!has_unmap) { | |
2804 | unmap = true; | |
2805 | } | |
2806 | if (!has_copy_mode) { | |
2807 | copy_mode = MIRROR_COPY_MODE_BACKGROUND; | |
2808 | } | |
2809 | if (has_auto_finalize && !auto_finalize) { | |
2810 | job_flags |= JOB_MANUAL_FINALIZE; | |
2811 | } | |
2812 | if (has_auto_dismiss && !auto_dismiss) { | |
2813 | job_flags |= JOB_MANUAL_DISMISS; | |
2814 | } | |
2815 | ||
2816 | if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) { | |
2817 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity", | |
2818 | "a value in range [512B, 64MB]"); | |
2819 | return; | |
2820 | } | |
2821 | if (granularity & (granularity - 1)) { | |
2822 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity", | |
2823 | "a power of 2"); | |
2824 | return; | |
2825 | } | |
2826 | ||
2827 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) { | |
2828 | return; | |
2829 | } | |
2830 | if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_MIRROR_TARGET, errp)) { | |
2831 | return; | |
2832 | } | |
2833 | ||
2834 | if (!bdrv_backing_chain_next(bs) && sync == MIRROR_SYNC_MODE_TOP) { | |
2835 | sync = MIRROR_SYNC_MODE_FULL; | |
2836 | } | |
2837 | ||
2838 | if (!replaces) { | |
2839 | /* We want to mirror from @bs, but keep implicit filters on top */ | |
2840 | unfiltered_bs = bdrv_skip_implicit_filters(bs); | |
2841 | if (unfiltered_bs != bs) { | |
2842 | replaces = unfiltered_bs->node_name; | |
2843 | } | |
2844 | } | |
2845 | ||
2846 | if (replaces) { | |
2847 | BlockDriverState *to_replace_bs; | |
2848 | int64_t bs_size, replace_size; | |
2849 | ||
2850 | bs_size = bdrv_getlength(bs); | |
2851 | if (bs_size < 0) { | |
2852 | error_setg_errno(errp, -bs_size, "Failed to query device's size"); | |
2853 | return; | |
2854 | } | |
2855 | ||
2856 | to_replace_bs = check_to_replace_node(bs, replaces, errp); | |
2857 | if (!to_replace_bs) { | |
2858 | return; | |
2859 | } | |
2860 | ||
2861 | replace_size = bdrv_getlength(to_replace_bs); | |
2862 | ||
2863 | if (replace_size < 0) { | |
2864 | error_setg_errno(errp, -replace_size, | |
2865 | "Failed to query the replacement node's size"); | |
2866 | return; | |
2867 | } | |
2868 | if (bs_size != replace_size) { | |
2869 | error_setg(errp, "cannot replace image with a mirror image of " | |
2870 | "different size"); | |
2871 | return; | |
2872 | } | |
2873 | } | |
2874 | ||
2875 | /* pass the node name to replace to mirror start since it's loose coupling | |
2876 | * and will allow to check whether the node still exist at mirror completion | |
2877 | */ | |
2878 | mirror_start(job_id, bs, target, | |
2879 | replaces, job_flags, | |
2880 | speed, granularity, buf_size, sync, backing_mode, zero_target, | |
2881 | on_source_error, on_target_error, unmap, filter_node_name, | |
2882 | copy_mode, errp); | |
2883 | } | |
2884 | ||
2885 | void qmp_drive_mirror(DriveMirror *arg, Error **errp) | |
2886 | { | |
2887 | BlockDriverState *bs; | |
2888 | BlockDriverState *target_backing_bs, *target_bs; | |
2889 | AioContext *aio_context; | |
2890 | BlockMirrorBackingMode backing_mode; | |
2891 | Error *local_err = NULL; | |
2892 | QDict *options = NULL; | |
2893 | int flags; | |
2894 | int64_t size; | |
2895 | const char *format = arg->format; | |
2896 | bool zero_target; | |
2897 | int ret; | |
2898 | ||
2899 | bs = qmp_get_root_bs(arg->device, errp); | |
2900 | if (!bs) { | |
2901 | return; | |
2902 | } | |
2903 | ||
2904 | /* Early check to avoid creating target */ | |
2905 | bdrv_graph_rdlock_main_loop(); | |
2906 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) { | |
2907 | bdrv_graph_rdunlock_main_loop(); | |
2908 | return; | |
2909 | } | |
2910 | ||
2911 | aio_context = bdrv_get_aio_context(bs); | |
2912 | ||
2913 | if (!arg->has_mode) { | |
2914 | arg->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
2915 | } | |
2916 | ||
2917 | if (!arg->format) { | |
2918 | format = (arg->mode == NEW_IMAGE_MODE_EXISTING | |
2919 | ? NULL : bs->drv->format_name); | |
2920 | } | |
2921 | ||
2922 | flags = bs->open_flags | BDRV_O_RDWR; | |
2923 | target_backing_bs = bdrv_cow_bs(bdrv_skip_filters(bs)); | |
2924 | if (!target_backing_bs && arg->sync == MIRROR_SYNC_MODE_TOP) { | |
2925 | arg->sync = MIRROR_SYNC_MODE_FULL; | |
2926 | } | |
2927 | if (arg->sync == MIRROR_SYNC_MODE_NONE) { | |
2928 | target_backing_bs = bs; | |
2929 | } | |
2930 | bdrv_graph_rdunlock_main_loop(); | |
2931 | ||
2932 | size = bdrv_getlength(bs); | |
2933 | if (size < 0) { | |
2934 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
2935 | return; | |
2936 | } | |
2937 | ||
2938 | if (arg->replaces) { | |
2939 | if (!arg->node_name) { | |
2940 | error_setg(errp, "a node-name must be provided when replacing a" | |
2941 | " named node of the graph"); | |
2942 | return; | |
2943 | } | |
2944 | } | |
2945 | ||
2946 | if (arg->mode == NEW_IMAGE_MODE_ABSOLUTE_PATHS) { | |
2947 | backing_mode = MIRROR_SOURCE_BACKING_CHAIN; | |
2948 | } else { | |
2949 | backing_mode = MIRROR_OPEN_BACKING_CHAIN; | |
2950 | } | |
2951 | ||
2952 | /* Don't open backing image in create() */ | |
2953 | flags |= BDRV_O_NO_BACKING; | |
2954 | ||
2955 | if ((arg->sync == MIRROR_SYNC_MODE_FULL || !target_backing_bs) | |
2956 | && arg->mode != NEW_IMAGE_MODE_EXISTING) | |
2957 | { | |
2958 | /* create new image w/o backing file */ | |
2959 | assert(format); | |
2960 | bdrv_img_create(arg->target, format, | |
2961 | NULL, NULL, NULL, size, flags, false, &local_err); | |
2962 | } else { | |
2963 | BlockDriverState *explicit_backing; | |
2964 | ||
2965 | switch (arg->mode) { | |
2966 | case NEW_IMAGE_MODE_EXISTING: | |
2967 | break; | |
2968 | case NEW_IMAGE_MODE_ABSOLUTE_PATHS: | |
2969 | /* | |
2970 | * Create new image with backing file. | |
2971 | * Implicit filters should not appear in the filename. | |
2972 | */ | |
2973 | bdrv_graph_rdlock_main_loop(); | |
2974 | explicit_backing = bdrv_skip_implicit_filters(target_backing_bs); | |
2975 | bdrv_refresh_filename(explicit_backing); | |
2976 | bdrv_graph_rdunlock_main_loop(); | |
2977 | ||
2978 | bdrv_img_create(arg->target, format, | |
2979 | explicit_backing->filename, | |
2980 | explicit_backing->drv->format_name, | |
2981 | NULL, size, flags, false, &local_err); | |
2982 | break; | |
2983 | default: | |
2984 | abort(); | |
2985 | } | |
2986 | } | |
2987 | ||
2988 | if (local_err) { | |
2989 | error_propagate(errp, local_err); | |
2990 | return; | |
2991 | } | |
2992 | ||
2993 | options = qdict_new(); | |
2994 | if (arg->node_name) { | |
2995 | qdict_put_str(options, "node-name", arg->node_name); | |
2996 | } | |
2997 | if (format) { | |
2998 | qdict_put_str(options, "driver", format); | |
2999 | } | |
3000 | ||
3001 | /* Mirroring takes care of copy-on-write using the source's backing | |
3002 | * file. | |
3003 | */ | |
3004 | target_bs = bdrv_open(arg->target, NULL, options, flags, errp); | |
3005 | if (!target_bs) { | |
3006 | return; | |
3007 | } | |
3008 | ||
3009 | bdrv_graph_rdlock_main_loop(); | |
3010 | zero_target = (arg->sync == MIRROR_SYNC_MODE_FULL && | |
3011 | (arg->mode == NEW_IMAGE_MODE_EXISTING || | |
3012 | !bdrv_has_zero_init(target_bs))); | |
3013 | bdrv_graph_rdunlock_main_loop(); | |
3014 | ||
3015 | ||
3016 | ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp); | |
3017 | if (ret < 0) { | |
3018 | bdrv_unref(target_bs); | |
3019 | return; | |
3020 | } | |
3021 | ||
3022 | blockdev_mirror_common(arg->job_id, bs, target_bs, | |
3023 | arg->replaces, arg->sync, | |
3024 | backing_mode, zero_target, | |
3025 | arg->has_speed, arg->speed, | |
3026 | arg->has_granularity, arg->granularity, | |
3027 | arg->has_buf_size, arg->buf_size, | |
3028 | arg->has_on_source_error, arg->on_source_error, | |
3029 | arg->has_on_target_error, arg->on_target_error, | |
3030 | arg->has_unmap, arg->unmap, | |
3031 | NULL, | |
3032 | arg->has_copy_mode, arg->copy_mode, | |
3033 | arg->has_auto_finalize, arg->auto_finalize, | |
3034 | arg->has_auto_dismiss, arg->auto_dismiss, | |
3035 | errp); | |
3036 | bdrv_unref(target_bs); | |
3037 | } | |
3038 | ||
3039 | void qmp_blockdev_mirror(const char *job_id, | |
3040 | const char *device, const char *target, | |
3041 | const char *replaces, | |
3042 | MirrorSyncMode sync, | |
3043 | bool has_speed, int64_t speed, | |
3044 | bool has_granularity, uint32_t granularity, | |
3045 | bool has_buf_size, int64_t buf_size, | |
3046 | bool has_on_source_error, | |
3047 | BlockdevOnError on_source_error, | |
3048 | bool has_on_target_error, | |
3049 | BlockdevOnError on_target_error, | |
3050 | const char *filter_node_name, | |
3051 | bool has_copy_mode, MirrorCopyMode copy_mode, | |
3052 | bool has_auto_finalize, bool auto_finalize, | |
3053 | bool has_auto_dismiss, bool auto_dismiss, | |
3054 | Error **errp) | |
3055 | { | |
3056 | BlockDriverState *bs; | |
3057 | BlockDriverState *target_bs; | |
3058 | AioContext *aio_context; | |
3059 | BlockMirrorBackingMode backing_mode = MIRROR_LEAVE_BACKING_CHAIN; | |
3060 | bool zero_target; | |
3061 | int ret; | |
3062 | ||
3063 | bs = qmp_get_root_bs(device, errp); | |
3064 | if (!bs) { | |
3065 | return; | |
3066 | } | |
3067 | ||
3068 | target_bs = bdrv_lookup_bs(target, target, errp); | |
3069 | if (!target_bs) { | |
3070 | return; | |
3071 | } | |
3072 | ||
3073 | zero_target = (sync == MIRROR_SYNC_MODE_FULL); | |
3074 | ||
3075 | aio_context = bdrv_get_aio_context(bs); | |
3076 | ||
3077 | ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp); | |
3078 | if (ret < 0) { | |
3079 | return; | |
3080 | } | |
3081 | ||
3082 | blockdev_mirror_common(job_id, bs, target_bs, | |
3083 | replaces, sync, backing_mode, | |
3084 | zero_target, has_speed, speed, | |
3085 | has_granularity, granularity, | |
3086 | has_buf_size, buf_size, | |
3087 | has_on_source_error, on_source_error, | |
3088 | has_on_target_error, on_target_error, | |
3089 | true, true, filter_node_name, | |
3090 | has_copy_mode, copy_mode, | |
3091 | has_auto_finalize, auto_finalize, | |
3092 | has_auto_dismiss, auto_dismiss, | |
3093 | errp); | |
3094 | } | |
3095 | ||
3096 | /* | |
3097 | * Get a block job using its ID. Called with job_mutex held. | |
3098 | */ | |
3099 | static BlockJob *find_block_job_locked(const char *id, Error **errp) | |
3100 | { | |
3101 | BlockJob *job; | |
3102 | ||
3103 | assert(id != NULL); | |
3104 | ||
3105 | job = block_job_get_locked(id); | |
3106 | ||
3107 | if (!job) { | |
3108 | error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE, | |
3109 | "Block job '%s' not found", id); | |
3110 | return NULL; | |
3111 | } | |
3112 | ||
3113 | return job; | |
3114 | } | |
3115 | ||
3116 | void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) | |
3117 | { | |
3118 | BlockJob *job; | |
3119 | ||
3120 | JOB_LOCK_GUARD(); | |
3121 | job = find_block_job_locked(device, errp); | |
3122 | ||
3123 | if (!job) { | |
3124 | return; | |
3125 | } | |
3126 | ||
3127 | block_job_set_speed_locked(job, speed, errp); | |
3128 | } | |
3129 | ||
3130 | void qmp_block_job_cancel(const char *device, | |
3131 | bool has_force, bool force, Error **errp) | |
3132 | { | |
3133 | BlockJob *job; | |
3134 | ||
3135 | JOB_LOCK_GUARD(); | |
3136 | job = find_block_job_locked(device, errp); | |
3137 | ||
3138 | if (!job) { | |
3139 | return; | |
3140 | } | |
3141 | ||
3142 | if (!has_force) { | |
3143 | force = false; | |
3144 | } | |
3145 | ||
3146 | if (job_user_paused_locked(&job->job) && !force) { | |
3147 | error_setg(errp, "The block job for device '%s' is currently paused", | |
3148 | device); | |
3149 | return; | |
3150 | } | |
3151 | ||
3152 | trace_qmp_block_job_cancel(job); | |
3153 | job_user_cancel_locked(&job->job, force, errp); | |
3154 | } | |
3155 | ||
3156 | void qmp_block_job_pause(const char *device, Error **errp) | |
3157 | { | |
3158 | BlockJob *job; | |
3159 | ||
3160 | JOB_LOCK_GUARD(); | |
3161 | job = find_block_job_locked(device, errp); | |
3162 | ||
3163 | if (!job) { | |
3164 | return; | |
3165 | } | |
3166 | ||
3167 | trace_qmp_block_job_pause(job); | |
3168 | job_user_pause_locked(&job->job, errp); | |
3169 | } | |
3170 | ||
3171 | void qmp_block_job_resume(const char *device, Error **errp) | |
3172 | { | |
3173 | BlockJob *job; | |
3174 | ||
3175 | JOB_LOCK_GUARD(); | |
3176 | job = find_block_job_locked(device, errp); | |
3177 | ||
3178 | if (!job) { | |
3179 | return; | |
3180 | } | |
3181 | ||
3182 | trace_qmp_block_job_resume(job); | |
3183 | job_user_resume_locked(&job->job, errp); | |
3184 | } | |
3185 | ||
3186 | void qmp_block_job_complete(const char *device, Error **errp) | |
3187 | { | |
3188 | BlockJob *job; | |
3189 | ||
3190 | JOB_LOCK_GUARD(); | |
3191 | job = find_block_job_locked(device, errp); | |
3192 | ||
3193 | if (!job) { | |
3194 | return; | |
3195 | } | |
3196 | ||
3197 | trace_qmp_block_job_complete(job); | |
3198 | job_complete_locked(&job->job, errp); | |
3199 | } | |
3200 | ||
3201 | void qmp_block_job_finalize(const char *id, Error **errp) | |
3202 | { | |
3203 | BlockJob *job; | |
3204 | ||
3205 | JOB_LOCK_GUARD(); | |
3206 | job = find_block_job_locked(id, errp); | |
3207 | ||
3208 | if (!job) { | |
3209 | return; | |
3210 | } | |
3211 | ||
3212 | trace_qmp_block_job_finalize(job); | |
3213 | job_ref_locked(&job->job); | |
3214 | job_finalize_locked(&job->job, errp); | |
3215 | ||
3216 | job_unref_locked(&job->job); | |
3217 | } | |
3218 | ||
3219 | void qmp_block_job_dismiss(const char *id, Error **errp) | |
3220 | { | |
3221 | BlockJob *bjob; | |
3222 | Job *job; | |
3223 | ||
3224 | JOB_LOCK_GUARD(); | |
3225 | bjob = find_block_job_locked(id, errp); | |
3226 | ||
3227 | if (!bjob) { | |
3228 | return; | |
3229 | } | |
3230 | ||
3231 | trace_qmp_block_job_dismiss(bjob); | |
3232 | job = &bjob->job; | |
3233 | job_dismiss_locked(&job, errp); | |
3234 | } | |
3235 | ||
3236 | void qmp_block_job_change(BlockJobChangeOptions *opts, Error **errp) | |
3237 | { | |
3238 | BlockJob *job; | |
3239 | ||
3240 | JOB_LOCK_GUARD(); | |
3241 | job = find_block_job_locked(opts->id, errp); | |
3242 | ||
3243 | if (!job) { | |
3244 | return; | |
3245 | } | |
3246 | ||
3247 | block_job_change_locked(job, opts, errp); | |
3248 | } | |
3249 | ||
3250 | void qmp_change_backing_file(const char *device, | |
3251 | const char *image_node_name, | |
3252 | const char *backing_file, | |
3253 | Error **errp) | |
3254 | { | |
3255 | BlockDriverState *bs = NULL; | |
3256 | BlockDriverState *image_bs = NULL; | |
3257 | Error *local_err = NULL; | |
3258 | bool ro; | |
3259 | int ret; | |
3260 | ||
3261 | bs = qmp_get_root_bs(device, errp); | |
3262 | if (!bs) { | |
3263 | return; | |
3264 | } | |
3265 | ||
3266 | bdrv_graph_rdlock_main_loop(); | |
3267 | ||
3268 | image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err); | |
3269 | if (local_err) { | |
3270 | error_propagate(errp, local_err); | |
3271 | goto out_rdlock; | |
3272 | } | |
3273 | ||
3274 | if (!image_bs) { | |
3275 | error_setg(errp, "image file not found"); | |
3276 | goto out_rdlock; | |
3277 | } | |
3278 | ||
3279 | if (bdrv_find_base(image_bs) == image_bs) { | |
3280 | error_setg(errp, "not allowing backing file change on an image " | |
3281 | "without a backing file"); | |
3282 | goto out_rdlock; | |
3283 | } | |
3284 | ||
3285 | /* even though we are not necessarily operating on bs, we need it to | |
3286 | * determine if block ops are currently prohibited on the chain */ | |
3287 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) { | |
3288 | goto out_rdlock; | |
3289 | } | |
3290 | ||
3291 | /* final sanity check */ | |
3292 | if (!bdrv_chain_contains(bs, image_bs)) { | |
3293 | error_setg(errp, "'%s' and image file are not in the same chain", | |
3294 | device); | |
3295 | goto out_rdlock; | |
3296 | } | |
3297 | bdrv_graph_rdunlock_main_loop(); | |
3298 | ||
3299 | /* if not r/w, reopen to make r/w */ | |
3300 | ro = bdrv_is_read_only(image_bs); | |
3301 | ||
3302 | if (ro) { | |
3303 | if (bdrv_reopen_set_read_only(image_bs, false, errp) != 0) { | |
3304 | return; | |
3305 | } | |
3306 | } | |
3307 | ||
3308 | ret = bdrv_change_backing_file(image_bs, backing_file, | |
3309 | image_bs->drv ? image_bs->drv->format_name : "", | |
3310 | false); | |
3311 | ||
3312 | if (ret < 0) { | |
3313 | error_setg_errno(errp, -ret, "Could not change backing file to '%s'", | |
3314 | backing_file); | |
3315 | /* don't exit here, so we can try to restore open flags if | |
3316 | * appropriate */ | |
3317 | } | |
3318 | ||
3319 | if (ro) { | |
3320 | bdrv_reopen_set_read_only(image_bs, true, errp); | |
3321 | } | |
3322 | return; | |
3323 | ||
3324 | out_rdlock: | |
3325 | bdrv_graph_rdunlock_main_loop(); | |
3326 | } | |
3327 | ||
3328 | void qmp_blockdev_add(BlockdevOptions *options, Error **errp) | |
3329 | { | |
3330 | BlockDriverState *bs; | |
3331 | QObject *obj; | |
3332 | Visitor *v = qobject_output_visitor_new(&obj); | |
3333 | QDict *qdict; | |
3334 | ||
3335 | visit_type_BlockdevOptions(v, NULL, &options, &error_abort); | |
3336 | visit_complete(v, &obj); | |
3337 | qdict = qobject_to(QDict, obj); | |
3338 | ||
3339 | qdict_flatten(qdict); | |
3340 | ||
3341 | if (!qdict_get_try_str(qdict, "node-name")) { | |
3342 | error_setg(errp, "'node-name' must be specified for the root node"); | |
3343 | goto fail; | |
3344 | } | |
3345 | ||
3346 | bs = bds_tree_init(qdict, errp); | |
3347 | if (!bs) { | |
3348 | goto fail; | |
3349 | } | |
3350 | ||
3351 | bdrv_set_monitor_owned(bs); | |
3352 | ||
3353 | fail: | |
3354 | visit_free(v); | |
3355 | } | |
3356 | ||
3357 | void qmp_blockdev_reopen(BlockdevOptionsList *reopen_list, Error **errp) | |
3358 | { | |
3359 | BlockReopenQueue *queue = NULL; | |
3360 | ||
3361 | /* Add each one of the BDS that we want to reopen to the queue */ | |
3362 | for (; reopen_list != NULL; reopen_list = reopen_list->next) { | |
3363 | BlockdevOptions *options = reopen_list->value; | |
3364 | BlockDriverState *bs; | |
3365 | QObject *obj; | |
3366 | Visitor *v; | |
3367 | QDict *qdict; | |
3368 | ||
3369 | /* Check for the selected node name */ | |
3370 | if (!options->node_name) { | |
3371 | error_setg(errp, "node-name not specified"); | |
3372 | goto fail; | |
3373 | } | |
3374 | ||
3375 | bs = bdrv_find_node(options->node_name); | |
3376 | if (!bs) { | |
3377 | error_setg(errp, "Failed to find node with node-name='%s'", | |
3378 | options->node_name); | |
3379 | goto fail; | |
3380 | } | |
3381 | ||
3382 | /* Put all options in a QDict and flatten it */ | |
3383 | v = qobject_output_visitor_new(&obj); | |
3384 | visit_type_BlockdevOptions(v, NULL, &options, &error_abort); | |
3385 | visit_complete(v, &obj); | |
3386 | visit_free(v); | |
3387 | ||
3388 | qdict = qobject_to(QDict, obj); | |
3389 | ||
3390 | qdict_flatten(qdict); | |
3391 | ||
3392 | queue = bdrv_reopen_queue(queue, bs, qdict, false); | |
3393 | } | |
3394 | ||
3395 | /* Perform the reopen operation */ | |
3396 | bdrv_reopen_multiple(queue, errp); | |
3397 | queue = NULL; | |
3398 | ||
3399 | fail: | |
3400 | bdrv_reopen_queue_free(queue); | |
3401 | } | |
3402 | ||
3403 | void qmp_blockdev_del(const char *node_name, Error **errp) | |
3404 | { | |
3405 | BlockDriverState *bs; | |
3406 | ||
3407 | GLOBAL_STATE_CODE(); | |
3408 | GRAPH_RDLOCK_GUARD_MAINLOOP(); | |
3409 | ||
3410 | bs = bdrv_find_node(node_name); | |
3411 | if (!bs) { | |
3412 | error_setg(errp, "Failed to find node with node-name='%s'", node_name); | |
3413 | return; | |
3414 | } | |
3415 | if (bdrv_has_blk(bs)) { | |
3416 | error_setg(errp, "Node %s is in use", node_name); | |
3417 | return; | |
3418 | } | |
3419 | ||
3420 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, errp)) { | |
3421 | return; | |
3422 | } | |
3423 | ||
3424 | if (!QTAILQ_IN_USE(bs, monitor_list)) { | |
3425 | error_setg(errp, "Node %s is not owned by the monitor", | |
3426 | bs->node_name); | |
3427 | return; | |
3428 | } | |
3429 | ||
3430 | if (bs->refcnt > 1) { | |
3431 | error_setg(errp, "Block device %s is in use", | |
3432 | bdrv_get_device_or_node_name(bs)); | |
3433 | return; | |
3434 | } | |
3435 | ||
3436 | QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list); | |
3437 | bdrv_unref(bs); | |
3438 | } | |
3439 | ||
3440 | static BdrvChild * GRAPH_RDLOCK | |
3441 | bdrv_find_child(BlockDriverState *parent_bs, const char *child_name) | |
3442 | { | |
3443 | BdrvChild *child; | |
3444 | ||
3445 | QLIST_FOREACH(child, &parent_bs->children, next) { | |
3446 | if (strcmp(child->name, child_name) == 0) { | |
3447 | return child; | |
3448 | } | |
3449 | } | |
3450 | ||
3451 | return NULL; | |
3452 | } | |
3453 | ||
3454 | void qmp_x_blockdev_change(const char *parent, const char *child, | |
3455 | const char *node, Error **errp) | |
3456 | { | |
3457 | BlockDriverState *parent_bs, *new_bs = NULL; | |
3458 | BdrvChild *p_child; | |
3459 | ||
3460 | bdrv_graph_wrlock(); | |
3461 | ||
3462 | parent_bs = bdrv_lookup_bs(parent, parent, errp); | |
3463 | if (!parent_bs) { | |
3464 | goto out; | |
3465 | } | |
3466 | ||
3467 | if (!child == !node) { | |
3468 | if (child) { | |
3469 | error_setg(errp, "The parameters child and node are in conflict"); | |
3470 | } else { | |
3471 | error_setg(errp, "Either child or node must be specified"); | |
3472 | } | |
3473 | goto out; | |
3474 | } | |
3475 | ||
3476 | if (child) { | |
3477 | p_child = bdrv_find_child(parent_bs, child); | |
3478 | if (!p_child) { | |
3479 | error_setg(errp, "Node '%s' does not have child '%s'", | |
3480 | parent, child); | |
3481 | goto out; | |
3482 | } | |
3483 | bdrv_del_child(parent_bs, p_child, errp); | |
3484 | } | |
3485 | ||
3486 | if (node) { | |
3487 | new_bs = bdrv_find_node(node); | |
3488 | if (!new_bs) { | |
3489 | error_setg(errp, "Node '%s' not found", node); | |
3490 | goto out; | |
3491 | } | |
3492 | bdrv_add_child(parent_bs, new_bs, errp); | |
3493 | } | |
3494 | ||
3495 | out: | |
3496 | bdrv_graph_wrunlock(); | |
3497 | } | |
3498 | ||
3499 | BlockJobInfoList *qmp_query_block_jobs(Error **errp) | |
3500 | { | |
3501 | BlockJobInfoList *head = NULL, **tail = &head; | |
3502 | BlockJob *job; | |
3503 | ||
3504 | JOB_LOCK_GUARD(); | |
3505 | ||
3506 | for (job = block_job_next_locked(NULL); job; | |
3507 | job = block_job_next_locked(job)) { | |
3508 | BlockJobInfo *value; | |
3509 | ||
3510 | if (block_job_is_internal(job)) { | |
3511 | continue; | |
3512 | } | |
3513 | value = block_job_query_locked(job, errp); | |
3514 | if (!value) { | |
3515 | qapi_free_BlockJobInfoList(head); | |
3516 | return NULL; | |
3517 | } | |
3518 | QAPI_LIST_APPEND(tail, value); | |
3519 | } | |
3520 | ||
3521 | return head; | |
3522 | } | |
3523 | ||
3524 | void qmp_x_blockdev_set_iothread(const char *node_name, StrOrNull *iothread, | |
3525 | bool has_force, bool force, Error **errp) | |
3526 | { | |
3527 | AioContext *new_context; | |
3528 | BlockDriverState *bs; | |
3529 | ||
3530 | GRAPH_RDLOCK_GUARD_MAINLOOP(); | |
3531 | ||
3532 | bs = bdrv_find_node(node_name); | |
3533 | if (!bs) { | |
3534 | error_setg(errp, "Failed to find node with node-name='%s'", node_name); | |
3535 | return; | |
3536 | } | |
3537 | ||
3538 | /* Protects against accidents. */ | |
3539 | if (!(has_force && force) && bdrv_has_blk(bs)) { | |
3540 | error_setg(errp, "Node %s is associated with a BlockBackend and could " | |
3541 | "be in use (use force=true to override this check)", | |
3542 | node_name); | |
3543 | return; | |
3544 | } | |
3545 | ||
3546 | if (iothread->type == QTYPE_QSTRING) { | |
3547 | IOThread *obj = iothread_by_id(iothread->u.s); | |
3548 | if (!obj) { | |
3549 | error_setg(errp, "Cannot find iothread %s", iothread->u.s); | |
3550 | return; | |
3551 | } | |
3552 | ||
3553 | new_context = iothread_get_aio_context(obj); | |
3554 | } else { | |
3555 | new_context = qemu_get_aio_context(); | |
3556 | } | |
3557 | ||
3558 | bdrv_try_change_aio_context(bs, new_context, NULL, errp); | |
3559 | } | |
3560 | ||
3561 | QemuOptsList qemu_common_drive_opts = { | |
3562 | .name = "drive", | |
3563 | .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head), | |
3564 | .desc = { | |
3565 | { | |
3566 | .name = "snapshot", | |
3567 | .type = QEMU_OPT_BOOL, | |
3568 | .help = "enable/disable snapshot mode", | |
3569 | },{ | |
3570 | .name = "aio", | |
3571 | .type = QEMU_OPT_STRING, | |
3572 | .help = "host AIO implementation (threads, native, io_uring)", | |
3573 | },{ | |
3574 | .name = BDRV_OPT_CACHE_WB, | |
3575 | .type = QEMU_OPT_BOOL, | |
3576 | .help = "Enable writeback mode", | |
3577 | },{ | |
3578 | .name = "format", | |
3579 | .type = QEMU_OPT_STRING, | |
3580 | .help = "disk format (raw, qcow2, ...)", | |
3581 | },{ | |
3582 | .name = "rerror", | |
3583 | .type = QEMU_OPT_STRING, | |
3584 | .help = "read error action", | |
3585 | },{ | |
3586 | .name = "werror", | |
3587 | .type = QEMU_OPT_STRING, | |
3588 | .help = "write error action", | |
3589 | },{ | |
3590 | .name = BDRV_OPT_READ_ONLY, | |
3591 | .type = QEMU_OPT_BOOL, | |
3592 | .help = "open drive file as read-only", | |
3593 | }, | |
3594 | ||
3595 | THROTTLE_OPTS, | |
3596 | ||
3597 | { | |
3598 | .name = "throttling.group", | |
3599 | .type = QEMU_OPT_STRING, | |
3600 | .help = "name of the block throttling group", | |
3601 | },{ | |
3602 | .name = "copy-on-read", | |
3603 | .type = QEMU_OPT_BOOL, | |
3604 | .help = "copy read data from backing file into image file", | |
3605 | },{ | |
3606 | .name = "detect-zeroes", | |
3607 | .type = QEMU_OPT_STRING, | |
3608 | .help = "try to optimize zero writes (off, on, unmap)", | |
3609 | },{ | |
3610 | .name = "stats-account-invalid", | |
3611 | .type = QEMU_OPT_BOOL, | |
3612 | .help = "whether to account for invalid I/O operations " | |
3613 | "in the statistics", | |
3614 | },{ | |
3615 | .name = "stats-account-failed", | |
3616 | .type = QEMU_OPT_BOOL, | |
3617 | .help = "whether to account for failed I/O operations " | |
3618 | "in the statistics", | |
3619 | }, | |
3620 | { /* end of list */ } | |
3621 | }, | |
3622 | }; | |
3623 | ||
3624 | QemuOptsList qemu_drive_opts = { | |
3625 | .name = "drive", | |
3626 | .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head), | |
3627 | .desc = { | |
3628 | /* | |
3629 | * no elements => accept any params | |
3630 | * validation will happen later | |
3631 | */ | |
3632 | { /* end of list */ } | |
3633 | }, | |
3634 | }; |