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/qdict.h" |
39 | #include "block/throttle-groups.h" |
40 | #include "monitor/monitor.h" |
41 | #include "qemu/error-report.h" |
42 | #include "qemu/option.h" |
43 | #include "qemu/qemu-print.h" |
44 | #include "qemu/config-file.h" |
45 | #include "qapi/qapi-commands-block.h" |
46 | #include "qapi/qapi-commands-transaction.h" |
47 | #include "qapi/qapi-visit-block-core.h" |
48 | #include "qapi/qmp/qdict.h" |
49 | #include "qapi/qmp/qnum.h" |
50 | #include "qapi/qmp/qstring.h" |
51 | #include "qapi/error.h" |
52 | #include "qapi/qmp/qerror.h" |
53 | #include "qapi/qmp/qlist.h" |
54 | #include "qapi/qobject-output-visitor.h" |
55 | #include "sysemu/sysemu.h" |
56 | #include "sysemu/iothread.h" |
57 | #include "block/block_int.h" |
58 | #include "block/trace.h" |
59 | #include "sysemu/arch_init.h" |
60 | #include "sysemu/qtest.h" |
61 | #include "sysemu/runstate.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 | static QTAILQ_HEAD(, BlockDriverState) monitor_bdrv_states = |
68 | QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states); |
69 | |
70 | static int do_open_tray(const char *blk_name, const char *qdev_id, |
71 | bool force, Error **errp); |
72 | static void blockdev_remove_medium(bool has_device, const char *device, |
73 | bool has_id, const char *id, Error **errp); |
74 | static void blockdev_insert_medium(bool has_device, const char *device, |
75 | bool has_id, const char *id, |
76 | const char *node_name, Error **errp); |
77 | |
78 | static const char *const if_name[IF_COUNT] = { |
79 | [IF_NONE] = "none" , |
80 | [IF_IDE] = "ide" , |
81 | [IF_SCSI] = "scsi" , |
82 | [IF_FLOPPY] = "floppy" , |
83 | [IF_PFLASH] = "pflash" , |
84 | [IF_MTD] = "mtd" , |
85 | [IF_SD] = "sd" , |
86 | [IF_VIRTIO] = "virtio" , |
87 | [IF_XEN] = "xen" , |
88 | }; |
89 | |
90 | static int if_max_devs[IF_COUNT] = { |
91 | /* |
92 | * Do not change these numbers! They govern how drive option |
93 | * index maps to unit and bus. That mapping is ABI. |
94 | * |
95 | * All controllers used to implement if=T drives need to support |
96 | * if_max_devs[T] units, for any T with if_max_devs[T] != 0. |
97 | * Otherwise, some index values map to "impossible" bus, unit |
98 | * values. |
99 | * |
100 | * For instance, if you change [IF_SCSI] to 255, -drive |
101 | * if=scsi,index=12 no longer means bus=1,unit=5, but |
102 | * bus=0,unit=12. With an lsi53c895a controller (7 units max), |
103 | * the drive can't be set up. Regression. |
104 | */ |
105 | [IF_IDE] = 2, |
106 | [IF_SCSI] = 7, |
107 | }; |
108 | |
109 | /** |
110 | * Boards may call this to offer board-by-board overrides |
111 | * of the default, global values. |
112 | */ |
113 | void override_max_devs(BlockInterfaceType type, int max_devs) |
114 | { |
115 | BlockBackend *blk; |
116 | DriveInfo *dinfo; |
117 | |
118 | if (max_devs <= 0) { |
119 | return; |
120 | } |
121 | |
122 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { |
123 | dinfo = blk_legacy_dinfo(blk); |
124 | if (dinfo->type == type) { |
125 | fprintf(stderr, "Cannot override units-per-bus property of" |
126 | " the %s interface, because a drive of that type has" |
127 | " already been added.\n" , if_name[type]); |
128 | g_assert_not_reached(); |
129 | } |
130 | } |
131 | |
132 | if_max_devs[type] = max_devs; |
133 | } |
134 | |
135 | /* |
136 | * We automatically delete the drive when a device using it gets |
137 | * unplugged. Questionable feature, but we can't just drop it. |
138 | * Device models call blockdev_mark_auto_del() to schedule the |
139 | * automatic deletion, and generic qdev code calls blockdev_auto_del() |
140 | * when deletion is actually safe. |
141 | */ |
142 | void blockdev_mark_auto_del(BlockBackend *blk) |
143 | { |
144 | DriveInfo *dinfo = blk_legacy_dinfo(blk); |
145 | BlockJob *job; |
146 | |
147 | if (!dinfo) { |
148 | return; |
149 | } |
150 | |
151 | for (job = block_job_next(NULL); job; job = block_job_next(job)) { |
152 | if (block_job_has_bdrv(job, blk_bs(blk))) { |
153 | AioContext *aio_context = job->job.aio_context; |
154 | aio_context_acquire(aio_context); |
155 | |
156 | job_cancel(&job->job, false); |
157 | |
158 | aio_context_release(aio_context); |
159 | } |
160 | } |
161 | |
162 | dinfo->auto_del = 1; |
163 | } |
164 | |
165 | void blockdev_auto_del(BlockBackend *blk) |
166 | { |
167 | DriveInfo *dinfo = blk_legacy_dinfo(blk); |
168 | |
169 | if (dinfo && dinfo->auto_del) { |
170 | monitor_remove_blk(blk); |
171 | blk_unref(blk); |
172 | } |
173 | } |
174 | |
175 | /** |
176 | * Returns the current mapping of how many units per bus |
177 | * a particular interface can support. |
178 | * |
179 | * A positive integer indicates n units per bus. |
180 | * 0 implies the mapping has not been established. |
181 | * -1 indicates an invalid BlockInterfaceType was given. |
182 | */ |
183 | int drive_get_max_devs(BlockInterfaceType type) |
184 | { |
185 | if (type >= IF_IDE && type < IF_COUNT) { |
186 | return if_max_devs[type]; |
187 | } |
188 | |
189 | return -1; |
190 | } |
191 | |
192 | static int drive_index_to_bus_id(BlockInterfaceType type, int index) |
193 | { |
194 | int max_devs = if_max_devs[type]; |
195 | return max_devs ? index / max_devs : 0; |
196 | } |
197 | |
198 | static int drive_index_to_unit_id(BlockInterfaceType type, int index) |
199 | { |
200 | int max_devs = if_max_devs[type]; |
201 | return max_devs ? index % max_devs : index; |
202 | } |
203 | |
204 | QemuOpts *drive_def(const char *optstr) |
205 | { |
206 | return qemu_opts_parse_noisily(qemu_find_opts("drive" ), optstr, false); |
207 | } |
208 | |
209 | QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, |
210 | const char *optstr) |
211 | { |
212 | QemuOpts *opts; |
213 | |
214 | opts = drive_def(optstr); |
215 | if (!opts) { |
216 | return NULL; |
217 | } |
218 | if (type != IF_DEFAULT) { |
219 | qemu_opt_set(opts, "if" , if_name[type], &error_abort); |
220 | } |
221 | if (index >= 0) { |
222 | qemu_opt_set_number(opts, "index" , index, &error_abort); |
223 | } |
224 | if (file) |
225 | qemu_opt_set(opts, "file" , file, &error_abort); |
226 | return opts; |
227 | } |
228 | |
229 | DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) |
230 | { |
231 | BlockBackend *blk; |
232 | DriveInfo *dinfo; |
233 | |
234 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { |
235 | dinfo = blk_legacy_dinfo(blk); |
236 | if (dinfo && dinfo->type == type |
237 | && dinfo->bus == bus && dinfo->unit == unit) { |
238 | return dinfo; |
239 | } |
240 | } |
241 | |
242 | return NULL; |
243 | } |
244 | |
245 | void drive_check_orphaned(void) |
246 | { |
247 | BlockBackend *blk; |
248 | DriveInfo *dinfo; |
249 | Location loc; |
250 | bool orphans = false; |
251 | |
252 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { |
253 | dinfo = blk_legacy_dinfo(blk); |
254 | if (!blk_get_attached_dev(blk) && !dinfo->is_default && |
255 | dinfo->type != IF_NONE) { |
256 | loc_push_none(&loc); |
257 | qemu_opts_loc_restore(dinfo->opts); |
258 | error_report("machine type does not support" |
259 | " if=%s,bus=%d,unit=%d" , |
260 | if_name[dinfo->type], dinfo->bus, dinfo->unit); |
261 | loc_pop(&loc); |
262 | orphans = true; |
263 | } |
264 | } |
265 | |
266 | if (orphans) { |
267 | exit(1); |
268 | } |
269 | } |
270 | |
271 | DriveInfo *drive_get_by_index(BlockInterfaceType type, int index) |
272 | { |
273 | return drive_get(type, |
274 | drive_index_to_bus_id(type, index), |
275 | drive_index_to_unit_id(type, index)); |
276 | } |
277 | |
278 | int drive_get_max_bus(BlockInterfaceType type) |
279 | { |
280 | int max_bus; |
281 | BlockBackend *blk; |
282 | DriveInfo *dinfo; |
283 | |
284 | max_bus = -1; |
285 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { |
286 | dinfo = blk_legacy_dinfo(blk); |
287 | if (dinfo && dinfo->type == type && dinfo->bus > max_bus) { |
288 | max_bus = dinfo->bus; |
289 | } |
290 | } |
291 | return max_bus; |
292 | } |
293 | |
294 | /* Get a block device. This should only be used for single-drive devices |
295 | (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the |
296 | appropriate bus. */ |
297 | DriveInfo *drive_get_next(BlockInterfaceType type) |
298 | { |
299 | static int next_block_unit[IF_COUNT]; |
300 | |
301 | return drive_get(type, 0, next_block_unit[type]++); |
302 | } |
303 | |
304 | static void bdrv_format_print(void *opaque, const char *name) |
305 | { |
306 | qemu_printf(" %s" , name); |
307 | } |
308 | |
309 | typedef struct { |
310 | QEMUBH *bh; |
311 | BlockDriverState *bs; |
312 | } BDRVPutRefBH; |
313 | |
314 | static int parse_block_error_action(const char *buf, bool is_read, Error **errp) |
315 | { |
316 | if (!strcmp(buf, "ignore" )) { |
317 | return BLOCKDEV_ON_ERROR_IGNORE; |
318 | } else if (!is_read && !strcmp(buf, "enospc" )) { |
319 | return BLOCKDEV_ON_ERROR_ENOSPC; |
320 | } else if (!strcmp(buf, "stop" )) { |
321 | return BLOCKDEV_ON_ERROR_STOP; |
322 | } else if (!strcmp(buf, "report" )) { |
323 | return BLOCKDEV_ON_ERROR_REPORT; |
324 | } else { |
325 | error_setg(errp, "'%s' invalid %s error action" , |
326 | buf, is_read ? "read" : "write" ); |
327 | return -1; |
328 | } |
329 | } |
330 | |
331 | static bool parse_stats_intervals(BlockAcctStats *stats, QList *intervals, |
332 | Error **errp) |
333 | { |
334 | const QListEntry *entry; |
335 | for (entry = qlist_first(intervals); entry; entry = qlist_next(entry)) { |
336 | switch (qobject_type(entry->value)) { |
337 | |
338 | case QTYPE_QSTRING: { |
339 | unsigned long long length; |
340 | const char *str = qstring_get_str(qobject_to(QString, |
341 | entry->value)); |
342 | if (parse_uint_full(str, &length, 10) == 0 && |
343 | length > 0 && length <= UINT_MAX) { |
344 | block_acct_add_interval(stats, (unsigned) length); |
345 | } else { |
346 | error_setg(errp, "Invalid interval length: %s" , str); |
347 | return false; |
348 | } |
349 | break; |
350 | } |
351 | |
352 | case QTYPE_QNUM: { |
353 | int64_t length = qnum_get_int(qobject_to(QNum, entry->value)); |
354 | |
355 | if (length > 0 && length <= UINT_MAX) { |
356 | block_acct_add_interval(stats, (unsigned) length); |
357 | } else { |
358 | error_setg(errp, "Invalid interval length: %" PRId64, length); |
359 | return false; |
360 | } |
361 | break; |
362 | } |
363 | |
364 | default: |
365 | error_setg(errp, "The specification of stats-intervals is invalid" ); |
366 | return false; |
367 | } |
368 | } |
369 | return true; |
370 | } |
371 | |
372 | typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType; |
373 | |
374 | /* All parameters but @opts are optional and may be set to NULL. */ |
375 | static void (QemuOpts *opts, int *bdrv_flags, |
376 | const char **throttling_group, ThrottleConfig *throttle_cfg, |
377 | BlockdevDetectZeroesOptions *detect_zeroes, Error **errp) |
378 | { |
379 | Error *local_error = NULL; |
380 | const char *aio; |
381 | |
382 | if (bdrv_flags) { |
383 | if (qemu_opt_get_bool(opts, "copy-on-read" , false)) { |
384 | *bdrv_flags |= BDRV_O_COPY_ON_READ; |
385 | } |
386 | |
387 | if ((aio = qemu_opt_get(opts, "aio" )) != NULL) { |
388 | if (!strcmp(aio, "native" )) { |
389 | *bdrv_flags |= BDRV_O_NATIVE_AIO; |
390 | } else if (!strcmp(aio, "threads" )) { |
391 | /* this is the default */ |
392 | } else { |
393 | error_setg(errp, "invalid aio option" ); |
394 | return; |
395 | } |
396 | } |
397 | } |
398 | |
399 | /* disk I/O throttling */ |
400 | if (throttling_group) { |
401 | *throttling_group = qemu_opt_get(opts, "throttling.group" ); |
402 | } |
403 | |
404 | if (throttle_cfg) { |
405 | throttle_config_init(throttle_cfg); |
406 | throttle_cfg->buckets[THROTTLE_BPS_TOTAL].avg = |
407 | qemu_opt_get_number(opts, "throttling.bps-total" , 0); |
408 | throttle_cfg->buckets[THROTTLE_BPS_READ].avg = |
409 | qemu_opt_get_number(opts, "throttling.bps-read" , 0); |
410 | throttle_cfg->buckets[THROTTLE_BPS_WRITE].avg = |
411 | qemu_opt_get_number(opts, "throttling.bps-write" , 0); |
412 | throttle_cfg->buckets[THROTTLE_OPS_TOTAL].avg = |
413 | qemu_opt_get_number(opts, "throttling.iops-total" , 0); |
414 | throttle_cfg->buckets[THROTTLE_OPS_READ].avg = |
415 | qemu_opt_get_number(opts, "throttling.iops-read" , 0); |
416 | throttle_cfg->buckets[THROTTLE_OPS_WRITE].avg = |
417 | qemu_opt_get_number(opts, "throttling.iops-write" , 0); |
418 | |
419 | throttle_cfg->buckets[THROTTLE_BPS_TOTAL].max = |
420 | qemu_opt_get_number(opts, "throttling.bps-total-max" , 0); |
421 | throttle_cfg->buckets[THROTTLE_BPS_READ].max = |
422 | qemu_opt_get_number(opts, "throttling.bps-read-max" , 0); |
423 | throttle_cfg->buckets[THROTTLE_BPS_WRITE].max = |
424 | qemu_opt_get_number(opts, "throttling.bps-write-max" , 0); |
425 | throttle_cfg->buckets[THROTTLE_OPS_TOTAL].max = |
426 | qemu_opt_get_number(opts, "throttling.iops-total-max" , 0); |
427 | throttle_cfg->buckets[THROTTLE_OPS_READ].max = |
428 | qemu_opt_get_number(opts, "throttling.iops-read-max" , 0); |
429 | throttle_cfg->buckets[THROTTLE_OPS_WRITE].max = |
430 | qemu_opt_get_number(opts, "throttling.iops-write-max" , 0); |
431 | |
432 | throttle_cfg->buckets[THROTTLE_BPS_TOTAL].burst_length = |
433 | qemu_opt_get_number(opts, "throttling.bps-total-max-length" , 1); |
434 | throttle_cfg->buckets[THROTTLE_BPS_READ].burst_length = |
435 | qemu_opt_get_number(opts, "throttling.bps-read-max-length" , 1); |
436 | throttle_cfg->buckets[THROTTLE_BPS_WRITE].burst_length = |
437 | qemu_opt_get_number(opts, "throttling.bps-write-max-length" , 1); |
438 | throttle_cfg->buckets[THROTTLE_OPS_TOTAL].burst_length = |
439 | qemu_opt_get_number(opts, "throttling.iops-total-max-length" , 1); |
440 | throttle_cfg->buckets[THROTTLE_OPS_READ].burst_length = |
441 | qemu_opt_get_number(opts, "throttling.iops-read-max-length" , 1); |
442 | throttle_cfg->buckets[THROTTLE_OPS_WRITE].burst_length = |
443 | qemu_opt_get_number(opts, "throttling.iops-write-max-length" , 1); |
444 | |
445 | throttle_cfg->op_size = |
446 | qemu_opt_get_number(opts, "throttling.iops-size" , 0); |
447 | |
448 | if (!throttle_is_valid(throttle_cfg, errp)) { |
449 | return; |
450 | } |
451 | } |
452 | |
453 | if (detect_zeroes) { |
454 | *detect_zeroes = |
455 | qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, |
456 | qemu_opt_get(opts, "detect-zeroes" ), |
457 | BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, |
458 | &local_error); |
459 | if (local_error) { |
460 | error_propagate(errp, local_error); |
461 | return; |
462 | } |
463 | } |
464 | } |
465 | |
466 | /* Takes the ownership of bs_opts */ |
467 | static BlockBackend *blockdev_init(const char *file, QDict *bs_opts, |
468 | Error **errp) |
469 | { |
470 | const char *buf; |
471 | int bdrv_flags = 0; |
472 | int on_read_error, on_write_error; |
473 | bool account_invalid, account_failed; |
474 | bool writethrough, read_only; |
475 | BlockBackend *blk; |
476 | BlockDriverState *bs; |
477 | ThrottleConfig cfg; |
478 | int snapshot = 0; |
479 | Error *error = NULL; |
480 | QemuOpts *opts; |
481 | QDict *interval_dict = NULL; |
482 | QList *interval_list = NULL; |
483 | const char *id; |
484 | BlockdevDetectZeroesOptions detect_zeroes = |
485 | BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; |
486 | const char *throttling_group = NULL; |
487 | |
488 | /* Check common options by copying from bs_opts to opts, all other options |
489 | * stay in bs_opts for processing by bdrv_open(). */ |
490 | id = qdict_get_try_str(bs_opts, "id" ); |
491 | opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error); |
492 | if (error) { |
493 | error_propagate(errp, error); |
494 | goto err_no_opts; |
495 | } |
496 | |
497 | qemu_opts_absorb_qdict(opts, bs_opts, &error); |
498 | if (error) { |
499 | error_propagate(errp, error); |
500 | goto early_err; |
501 | } |
502 | |
503 | if (id) { |
504 | qdict_del(bs_opts, "id" ); |
505 | } |
506 | |
507 | /* extract parameters */ |
508 | snapshot = qemu_opt_get_bool(opts, "snapshot" , 0); |
509 | |
510 | account_invalid = qemu_opt_get_bool(opts, "stats-account-invalid" , true); |
511 | account_failed = qemu_opt_get_bool(opts, "stats-account-failed" , true); |
512 | |
513 | writethrough = !qemu_opt_get_bool(opts, BDRV_OPT_CACHE_WB, true); |
514 | |
515 | id = qemu_opts_id(opts); |
516 | |
517 | qdict_extract_subqdict(bs_opts, &interval_dict, "stats-intervals." ); |
518 | qdict_array_split(interval_dict, &interval_list); |
519 | |
520 | if (qdict_size(interval_dict) != 0) { |
521 | error_setg(errp, "Invalid option stats-intervals.%s" , |
522 | qdict_first(interval_dict)->key); |
523 | goto early_err; |
524 | } |
525 | |
526 | extract_common_blockdev_options(opts, &bdrv_flags, &throttling_group, &cfg, |
527 | &detect_zeroes, &error); |
528 | if (error) { |
529 | error_propagate(errp, error); |
530 | goto early_err; |
531 | } |
532 | |
533 | if ((buf = qemu_opt_get(opts, "format" )) != NULL) { |
534 | if (is_help_option(buf)) { |
535 | qemu_printf("Supported formats:" ); |
536 | bdrv_iterate_format(bdrv_format_print, NULL, false); |
537 | qemu_printf("\nSupported formats (read-only):" ); |
538 | bdrv_iterate_format(bdrv_format_print, NULL, true); |
539 | qemu_printf("\n" ); |
540 | goto early_err; |
541 | } |
542 | |
543 | if (qdict_haskey(bs_opts, "driver" )) { |
544 | error_setg(errp, "Cannot specify both 'driver' and 'format'" ); |
545 | goto early_err; |
546 | } |
547 | qdict_put_str(bs_opts, "driver" , buf); |
548 | } |
549 | |
550 | on_write_error = BLOCKDEV_ON_ERROR_ENOSPC; |
551 | if ((buf = qemu_opt_get(opts, "werror" )) != NULL) { |
552 | on_write_error = parse_block_error_action(buf, 0, &error); |
553 | if (error) { |
554 | error_propagate(errp, error); |
555 | goto early_err; |
556 | } |
557 | } |
558 | |
559 | on_read_error = BLOCKDEV_ON_ERROR_REPORT; |
560 | if ((buf = qemu_opt_get(opts, "rerror" )) != NULL) { |
561 | on_read_error = parse_block_error_action(buf, 1, &error); |
562 | if (error) { |
563 | error_propagate(errp, error); |
564 | goto early_err; |
565 | } |
566 | } |
567 | |
568 | if (snapshot) { |
569 | bdrv_flags |= BDRV_O_SNAPSHOT; |
570 | } |
571 | |
572 | read_only = qemu_opt_get_bool(opts, BDRV_OPT_READ_ONLY, false); |
573 | |
574 | /* init */ |
575 | if ((!file || !*file) && !qdict_size(bs_opts)) { |
576 | BlockBackendRootState *blk_rs; |
577 | |
578 | blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL); |
579 | blk_rs = blk_get_root_state(blk); |
580 | blk_rs->open_flags = bdrv_flags; |
581 | blk_rs->read_only = read_only; |
582 | blk_rs->detect_zeroes = detect_zeroes; |
583 | |
584 | qobject_unref(bs_opts); |
585 | } else { |
586 | if (file && !*file) { |
587 | file = NULL; |
588 | } |
589 | |
590 | /* bdrv_open() defaults to the values in bdrv_flags (for compatibility |
591 | * with other callers) rather than what we want as the real defaults. |
592 | * Apply the defaults here instead. */ |
593 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off" ); |
594 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off" ); |
595 | qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY, |
596 | read_only ? "on" : "off" ); |
597 | qdict_set_default_str(bs_opts, BDRV_OPT_AUTO_READ_ONLY, "on" ); |
598 | assert((bdrv_flags & BDRV_O_CACHE_MASK) == 0); |
599 | |
600 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
601 | bdrv_flags |= BDRV_O_INACTIVE; |
602 | } |
603 | |
604 | blk = blk_new_open(file, NULL, bs_opts, bdrv_flags, errp); |
605 | if (!blk) { |
606 | goto err_no_bs_opts; |
607 | } |
608 | bs = blk_bs(blk); |
609 | |
610 | bs->detect_zeroes = detect_zeroes; |
611 | |
612 | block_acct_setup(blk_get_stats(blk), account_invalid, account_failed); |
613 | |
614 | if (!parse_stats_intervals(blk_get_stats(blk), interval_list, errp)) { |
615 | blk_unref(blk); |
616 | blk = NULL; |
617 | goto err_no_bs_opts; |
618 | } |
619 | } |
620 | |
621 | /* disk I/O throttling */ |
622 | if (throttle_enabled(&cfg)) { |
623 | if (!throttling_group) { |
624 | throttling_group = id; |
625 | } |
626 | blk_io_limits_enable(blk, throttling_group); |
627 | blk_set_io_limits(blk, &cfg); |
628 | } |
629 | |
630 | blk_set_enable_write_cache(blk, !writethrough); |
631 | blk_set_on_error(blk, on_read_error, on_write_error); |
632 | |
633 | if (!monitor_add_blk(blk, id, errp)) { |
634 | blk_unref(blk); |
635 | blk = NULL; |
636 | goto err_no_bs_opts; |
637 | } |
638 | |
639 | err_no_bs_opts: |
640 | qemu_opts_del(opts); |
641 | qobject_unref(interval_dict); |
642 | qobject_unref(interval_list); |
643 | return blk; |
644 | |
645 | early_err: |
646 | qemu_opts_del(opts); |
647 | qobject_unref(interval_dict); |
648 | qobject_unref(interval_list); |
649 | err_no_opts: |
650 | qobject_unref(bs_opts); |
651 | return NULL; |
652 | } |
653 | |
654 | /* Takes the ownership of bs_opts */ |
655 | static BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp) |
656 | { |
657 | int bdrv_flags = 0; |
658 | |
659 | /* bdrv_open() defaults to the values in bdrv_flags (for compatibility |
660 | * with other callers) rather than what we want as the real defaults. |
661 | * Apply the defaults here instead. */ |
662 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off" ); |
663 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off" ); |
664 | qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY, "off" ); |
665 | |
666 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
667 | bdrv_flags |= BDRV_O_INACTIVE; |
668 | } |
669 | |
670 | return bdrv_open(NULL, NULL, bs_opts, bdrv_flags, errp); |
671 | } |
672 | |
673 | void blockdev_close_all_bdrv_states(void) |
674 | { |
675 | BlockDriverState *bs, *next_bs; |
676 | |
677 | QTAILQ_FOREACH_SAFE(bs, &monitor_bdrv_states, monitor_list, next_bs) { |
678 | AioContext *ctx = bdrv_get_aio_context(bs); |
679 | |
680 | aio_context_acquire(ctx); |
681 | bdrv_unref(bs); |
682 | aio_context_release(ctx); |
683 | } |
684 | } |
685 | |
686 | /* Iterates over the list of monitor-owned BlockDriverStates */ |
687 | BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs) |
688 | { |
689 | return bs ? QTAILQ_NEXT(bs, monitor_list) |
690 | : QTAILQ_FIRST(&monitor_bdrv_states); |
691 | } |
692 | |
693 | static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to, |
694 | Error **errp) |
695 | { |
696 | const char *value; |
697 | |
698 | value = qemu_opt_get(opts, from); |
699 | if (value) { |
700 | if (qemu_opt_find(opts, to)) { |
701 | error_setg(errp, "'%s' and its alias '%s' can't be used at the " |
702 | "same time" , to, from); |
703 | return; |
704 | } |
705 | } |
706 | |
707 | /* rename all items in opts */ |
708 | while ((value = qemu_opt_get(opts, from))) { |
709 | qemu_opt_set(opts, to, value, &error_abort); |
710 | qemu_opt_unset(opts, from); |
711 | } |
712 | } |
713 | |
714 | QemuOptsList qemu_legacy_drive_opts = { |
715 | .name = "drive" , |
716 | .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head), |
717 | .desc = { |
718 | { |
719 | .name = "bus" , |
720 | .type = QEMU_OPT_NUMBER, |
721 | .help = "bus number" , |
722 | },{ |
723 | .name = "unit" , |
724 | .type = QEMU_OPT_NUMBER, |
725 | .help = "unit number (i.e. lun for scsi)" , |
726 | },{ |
727 | .name = "index" , |
728 | .type = QEMU_OPT_NUMBER, |
729 | .help = "index number" , |
730 | },{ |
731 | .name = "media" , |
732 | .type = QEMU_OPT_STRING, |
733 | .help = "media type (disk, cdrom)" , |
734 | },{ |
735 | .name = "if" , |
736 | .type = QEMU_OPT_STRING, |
737 | .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)" , |
738 | },{ |
739 | .name = "file" , |
740 | .type = QEMU_OPT_STRING, |
741 | .help = "file name" , |
742 | }, |
743 | |
744 | /* Options that are passed on, but have special semantics with -drive */ |
745 | { |
746 | .name = BDRV_OPT_READ_ONLY, |
747 | .type = QEMU_OPT_BOOL, |
748 | .help = "open drive file as read-only" , |
749 | },{ |
750 | .name = "rerror" , |
751 | .type = QEMU_OPT_STRING, |
752 | .help = "read error action" , |
753 | },{ |
754 | .name = "werror" , |
755 | .type = QEMU_OPT_STRING, |
756 | .help = "write error action" , |
757 | },{ |
758 | .name = "copy-on-read" , |
759 | .type = QEMU_OPT_BOOL, |
760 | .help = "copy read data from backing file into image file" , |
761 | }, |
762 | |
763 | { /* end of list */ } |
764 | }, |
765 | }; |
766 | |
767 | DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type, |
768 | Error **errp) |
769 | { |
770 | const char *value; |
771 | BlockBackend *blk; |
772 | DriveInfo *dinfo = NULL; |
773 | QDict *bs_opts; |
774 | QemuOpts *legacy_opts; |
775 | DriveMediaType media = MEDIA_DISK; |
776 | BlockInterfaceType type; |
777 | int max_devs, bus_id, unit_id, index; |
778 | const char *werror, *rerror; |
779 | bool read_only = false; |
780 | bool copy_on_read; |
781 | const char *filename; |
782 | Error *local_err = NULL; |
783 | int i; |
784 | |
785 | /* Change legacy command line options into QMP ones */ |
786 | static const struct { |
787 | const char *from; |
788 | const char *to; |
789 | } opt_renames[] = { |
790 | { "iops" , "throttling.iops-total" }, |
791 | { "iops_rd" , "throttling.iops-read" }, |
792 | { "iops_wr" , "throttling.iops-write" }, |
793 | |
794 | { "bps" , "throttling.bps-total" }, |
795 | { "bps_rd" , "throttling.bps-read" }, |
796 | { "bps_wr" , "throttling.bps-write" }, |
797 | |
798 | { "iops_max" , "throttling.iops-total-max" }, |
799 | { "iops_rd_max" , "throttling.iops-read-max" }, |
800 | { "iops_wr_max" , "throttling.iops-write-max" }, |
801 | |
802 | { "bps_max" , "throttling.bps-total-max" }, |
803 | { "bps_rd_max" , "throttling.bps-read-max" }, |
804 | { "bps_wr_max" , "throttling.bps-write-max" }, |
805 | |
806 | { "iops_size" , "throttling.iops-size" }, |
807 | |
808 | { "group" , "throttling.group" }, |
809 | |
810 | { "readonly" , BDRV_OPT_READ_ONLY }, |
811 | }; |
812 | |
813 | for (i = 0; i < ARRAY_SIZE(opt_renames); i++) { |
814 | qemu_opt_rename(all_opts, opt_renames[i].from, opt_renames[i].to, |
815 | &local_err); |
816 | if (local_err) { |
817 | error_propagate(errp, local_err); |
818 | return NULL; |
819 | } |
820 | } |
821 | |
822 | value = qemu_opt_get(all_opts, "cache" ); |
823 | if (value) { |
824 | int flags = 0; |
825 | bool writethrough; |
826 | |
827 | if (bdrv_parse_cache_mode(value, &flags, &writethrough) != 0) { |
828 | error_setg(errp, "invalid cache option" ); |
829 | return NULL; |
830 | } |
831 | |
832 | /* Specific options take precedence */ |
833 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_WB)) { |
834 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_WB, |
835 | !writethrough, &error_abort); |
836 | } |
837 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_DIRECT)) { |
838 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_DIRECT, |
839 | !!(flags & BDRV_O_NOCACHE), &error_abort); |
840 | } |
841 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_NO_FLUSH)) { |
842 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_NO_FLUSH, |
843 | !!(flags & BDRV_O_NO_FLUSH), &error_abort); |
844 | } |
845 | qemu_opt_unset(all_opts, "cache" ); |
846 | } |
847 | |
848 | /* Get a QDict for processing the options */ |
849 | bs_opts = qdict_new(); |
850 | qemu_opts_to_qdict(all_opts, bs_opts); |
851 | |
852 | legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0, |
853 | &error_abort); |
854 | qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err); |
855 | if (local_err) { |
856 | error_propagate(errp, local_err); |
857 | goto fail; |
858 | } |
859 | |
860 | /* Media type */ |
861 | value = qemu_opt_get(legacy_opts, "media" ); |
862 | if (value) { |
863 | if (!strcmp(value, "disk" )) { |
864 | media = MEDIA_DISK; |
865 | } else if (!strcmp(value, "cdrom" )) { |
866 | media = MEDIA_CDROM; |
867 | read_only = true; |
868 | } else { |
869 | error_setg(errp, "'%s' invalid media" , value); |
870 | goto fail; |
871 | } |
872 | } |
873 | |
874 | /* copy-on-read is disabled with a warning for read-only devices */ |
875 | read_only |= qemu_opt_get_bool(legacy_opts, BDRV_OPT_READ_ONLY, false); |
876 | copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read" , false); |
877 | |
878 | if (read_only && copy_on_read) { |
879 | warn_report("disabling copy-on-read on read-only drive" ); |
880 | copy_on_read = false; |
881 | } |
882 | |
883 | qdict_put_str(bs_opts, BDRV_OPT_READ_ONLY, read_only ? "on" : "off" ); |
884 | qdict_put_str(bs_opts, "copy-on-read" , copy_on_read ? "on" : "off" ); |
885 | |
886 | /* Controller type */ |
887 | value = qemu_opt_get(legacy_opts, "if" ); |
888 | if (value) { |
889 | for (type = 0; |
890 | type < IF_COUNT && strcmp(value, if_name[type]); |
891 | type++) { |
892 | } |
893 | if (type == IF_COUNT) { |
894 | error_setg(errp, "unsupported bus type '%s'" , value); |
895 | goto fail; |
896 | } |
897 | } else { |
898 | type = block_default_type; |
899 | } |
900 | |
901 | /* Device address specified by bus/unit or index. |
902 | * If none was specified, try to find the first free one. */ |
903 | bus_id = qemu_opt_get_number(legacy_opts, "bus" , 0); |
904 | unit_id = qemu_opt_get_number(legacy_opts, "unit" , -1); |
905 | index = qemu_opt_get_number(legacy_opts, "index" , -1); |
906 | |
907 | max_devs = if_max_devs[type]; |
908 | |
909 | if (index != -1) { |
910 | if (bus_id != 0 || unit_id != -1) { |
911 | error_setg(errp, "index cannot be used with bus and unit" ); |
912 | goto fail; |
913 | } |
914 | bus_id = drive_index_to_bus_id(type, index); |
915 | unit_id = drive_index_to_unit_id(type, index); |
916 | } |
917 | |
918 | if (unit_id == -1) { |
919 | unit_id = 0; |
920 | while (drive_get(type, bus_id, unit_id) != NULL) { |
921 | unit_id++; |
922 | if (max_devs && unit_id >= max_devs) { |
923 | unit_id -= max_devs; |
924 | bus_id++; |
925 | } |
926 | } |
927 | } |
928 | |
929 | if (max_devs && unit_id >= max_devs) { |
930 | error_setg(errp, "unit %d too big (max is %d)" , unit_id, max_devs - 1); |
931 | goto fail; |
932 | } |
933 | |
934 | if (drive_get(type, bus_id, unit_id) != NULL) { |
935 | error_setg(errp, "drive with bus=%d, unit=%d (index=%d) exists" , |
936 | bus_id, unit_id, index); |
937 | goto fail; |
938 | } |
939 | |
940 | /* no id supplied -> create one */ |
941 | if (qemu_opts_id(all_opts) == NULL) { |
942 | char *new_id; |
943 | const char *mediastr = "" ; |
944 | if (type == IF_IDE || type == IF_SCSI) { |
945 | mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd" ; |
946 | } |
947 | if (max_devs) { |
948 | new_id = g_strdup_printf("%s%i%s%i" , if_name[type], bus_id, |
949 | mediastr, unit_id); |
950 | } else { |
951 | new_id = g_strdup_printf("%s%s%i" , if_name[type], |
952 | mediastr, unit_id); |
953 | } |
954 | qdict_put_str(bs_opts, "id" , new_id); |
955 | g_free(new_id); |
956 | } |
957 | |
958 | /* Add virtio block device */ |
959 | if (type == IF_VIRTIO) { |
960 | QemuOpts *devopts; |
961 | devopts = qemu_opts_create(qemu_find_opts("device" ), NULL, 0, |
962 | &error_abort); |
963 | if (arch_type == QEMU_ARCH_S390X) { |
964 | qemu_opt_set(devopts, "driver" , "virtio-blk-ccw" , &error_abort); |
965 | } else { |
966 | qemu_opt_set(devopts, "driver" , "virtio-blk-pci" , &error_abort); |
967 | } |
968 | qemu_opt_set(devopts, "drive" , qdict_get_str(bs_opts, "id" ), |
969 | &error_abort); |
970 | } |
971 | |
972 | filename = qemu_opt_get(legacy_opts, "file" ); |
973 | |
974 | /* Check werror/rerror compatibility with if=... */ |
975 | werror = qemu_opt_get(legacy_opts, "werror" ); |
976 | if (werror != NULL) { |
977 | if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && |
978 | type != IF_NONE) { |
979 | error_setg(errp, "werror is not supported by this bus type" ); |
980 | goto fail; |
981 | } |
982 | qdict_put_str(bs_opts, "werror" , werror); |
983 | } |
984 | |
985 | rerror = qemu_opt_get(legacy_opts, "rerror" ); |
986 | if (rerror != NULL) { |
987 | if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && |
988 | type != IF_NONE) { |
989 | error_setg(errp, "rerror is not supported by this bus type" ); |
990 | goto fail; |
991 | } |
992 | qdict_put_str(bs_opts, "rerror" , rerror); |
993 | } |
994 | |
995 | /* Actual block device init: Functionality shared with blockdev-add */ |
996 | blk = blockdev_init(filename, bs_opts, &local_err); |
997 | bs_opts = NULL; |
998 | if (!blk) { |
999 | error_propagate(errp, local_err); |
1000 | goto fail; |
1001 | } else { |
1002 | assert(!local_err); |
1003 | } |
1004 | |
1005 | /* Create legacy DriveInfo */ |
1006 | dinfo = g_malloc0(sizeof(*dinfo)); |
1007 | dinfo->opts = all_opts; |
1008 | |
1009 | dinfo->type = type; |
1010 | dinfo->bus = bus_id; |
1011 | dinfo->unit = unit_id; |
1012 | |
1013 | blk_set_legacy_dinfo(blk, dinfo); |
1014 | |
1015 | switch(type) { |
1016 | case IF_IDE: |
1017 | case IF_SCSI: |
1018 | case IF_XEN: |
1019 | case IF_NONE: |
1020 | dinfo->media_cd = media == MEDIA_CDROM; |
1021 | break; |
1022 | default: |
1023 | break; |
1024 | } |
1025 | |
1026 | fail: |
1027 | qemu_opts_del(legacy_opts); |
1028 | qobject_unref(bs_opts); |
1029 | return dinfo; |
1030 | } |
1031 | |
1032 | static BlockDriverState *qmp_get_root_bs(const char *name, Error **errp) |
1033 | { |
1034 | BlockDriverState *bs; |
1035 | |
1036 | bs = bdrv_lookup_bs(name, name, errp); |
1037 | if (bs == NULL) { |
1038 | return NULL; |
1039 | } |
1040 | |
1041 | if (!bdrv_is_root_node(bs)) { |
1042 | error_setg(errp, "Need a root block node" ); |
1043 | return NULL; |
1044 | } |
1045 | |
1046 | if (!bdrv_is_inserted(bs)) { |
1047 | error_setg(errp, "Device has no medium" ); |
1048 | return NULL; |
1049 | } |
1050 | |
1051 | return bs; |
1052 | } |
1053 | |
1054 | static BlockBackend *qmp_get_blk(const char *blk_name, const char *qdev_id, |
1055 | Error **errp) |
1056 | { |
1057 | BlockBackend *blk; |
1058 | |
1059 | if (!blk_name == !qdev_id) { |
1060 | error_setg(errp, "Need exactly one of 'device' and 'id'" ); |
1061 | return NULL; |
1062 | } |
1063 | |
1064 | if (qdev_id) { |
1065 | blk = blk_by_qdev_id(qdev_id, errp); |
1066 | } else { |
1067 | blk = blk_by_name(blk_name); |
1068 | if (blk == NULL) { |
1069 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, |
1070 | "Device '%s' not found" , blk_name); |
1071 | } |
1072 | } |
1073 | |
1074 | return blk; |
1075 | } |
1076 | |
1077 | void hmp_commit(Monitor *mon, const QDict *qdict) |
1078 | { |
1079 | const char *device = qdict_get_str(qdict, "device" ); |
1080 | BlockBackend *blk; |
1081 | int ret; |
1082 | |
1083 | if (!strcmp(device, "all" )) { |
1084 | ret = blk_commit_all(); |
1085 | } else { |
1086 | BlockDriverState *bs; |
1087 | AioContext *aio_context; |
1088 | |
1089 | blk = blk_by_name(device); |
1090 | if (!blk) { |
1091 | monitor_printf(mon, "Device '%s' not found\n" , device); |
1092 | return; |
1093 | } |
1094 | if (!blk_is_available(blk)) { |
1095 | monitor_printf(mon, "Device '%s' has no medium\n" , device); |
1096 | return; |
1097 | } |
1098 | |
1099 | bs = blk_bs(blk); |
1100 | aio_context = bdrv_get_aio_context(bs); |
1101 | aio_context_acquire(aio_context); |
1102 | |
1103 | ret = bdrv_commit(bs); |
1104 | |
1105 | aio_context_release(aio_context); |
1106 | } |
1107 | if (ret < 0) { |
1108 | monitor_printf(mon, "'commit' error for '%s': %s\n" , device, |
1109 | strerror(-ret)); |
1110 | } |
1111 | } |
1112 | |
1113 | static void blockdev_do_action(TransactionAction *action, Error **errp) |
1114 | { |
1115 | TransactionActionList list; |
1116 | |
1117 | list.value = action; |
1118 | list.next = NULL; |
1119 | qmp_transaction(&list, false, NULL, errp); |
1120 | } |
1121 | |
1122 | void qmp_blockdev_snapshot_sync(bool has_device, const char *device, |
1123 | bool has_node_name, const char *node_name, |
1124 | const char *snapshot_file, |
1125 | bool has_snapshot_node_name, |
1126 | const char *snapshot_node_name, |
1127 | bool has_format, const char *format, |
1128 | bool has_mode, NewImageMode mode, Error **errp) |
1129 | { |
1130 | BlockdevSnapshotSync snapshot = { |
1131 | .has_device = has_device, |
1132 | .device = (char *) device, |
1133 | .has_node_name = has_node_name, |
1134 | .node_name = (char *) node_name, |
1135 | .snapshot_file = (char *) snapshot_file, |
1136 | .has_snapshot_node_name = has_snapshot_node_name, |
1137 | .snapshot_node_name = (char *) snapshot_node_name, |
1138 | .has_format = has_format, |
1139 | .format = (char *) format, |
1140 | .has_mode = has_mode, |
1141 | .mode = mode, |
1142 | }; |
1143 | TransactionAction action = { |
1144 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, |
1145 | .u.blockdev_snapshot_sync.data = &snapshot, |
1146 | }; |
1147 | blockdev_do_action(&action, errp); |
1148 | } |
1149 | |
1150 | void qmp_blockdev_snapshot(const char *node, const char *overlay, |
1151 | Error **errp) |
1152 | { |
1153 | BlockdevSnapshot snapshot_data = { |
1154 | .node = (char *) node, |
1155 | .overlay = (char *) overlay |
1156 | }; |
1157 | TransactionAction action = { |
1158 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT, |
1159 | .u.blockdev_snapshot.data = &snapshot_data, |
1160 | }; |
1161 | blockdev_do_action(&action, errp); |
1162 | } |
1163 | |
1164 | void qmp_blockdev_snapshot_internal_sync(const char *device, |
1165 | const char *name, |
1166 | Error **errp) |
1167 | { |
1168 | BlockdevSnapshotInternal snapshot = { |
1169 | .device = (char *) device, |
1170 | .name = (char *) name |
1171 | }; |
1172 | TransactionAction action = { |
1173 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC, |
1174 | .u.blockdev_snapshot_internal_sync.data = &snapshot, |
1175 | }; |
1176 | blockdev_do_action(&action, errp); |
1177 | } |
1178 | |
1179 | SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device, |
1180 | bool has_id, |
1181 | const char *id, |
1182 | bool has_name, |
1183 | const char *name, |
1184 | Error **errp) |
1185 | { |
1186 | BlockDriverState *bs; |
1187 | AioContext *aio_context; |
1188 | QEMUSnapshotInfo sn; |
1189 | Error *local_err = NULL; |
1190 | SnapshotInfo *info = NULL; |
1191 | int ret; |
1192 | |
1193 | bs = qmp_get_root_bs(device, errp); |
1194 | if (!bs) { |
1195 | return NULL; |
1196 | } |
1197 | aio_context = bdrv_get_aio_context(bs); |
1198 | aio_context_acquire(aio_context); |
1199 | |
1200 | if (!has_id) { |
1201 | id = NULL; |
1202 | } |
1203 | |
1204 | if (!has_name) { |
1205 | name = NULL; |
1206 | } |
1207 | |
1208 | if (!id && !name) { |
1209 | error_setg(errp, "Name or id must be provided" ); |
1210 | goto out_aio_context; |
1211 | } |
1212 | |
1213 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, errp)) { |
1214 | goto out_aio_context; |
1215 | } |
1216 | |
1217 | ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err); |
1218 | if (local_err) { |
1219 | error_propagate(errp, local_err); |
1220 | goto out_aio_context; |
1221 | } |
1222 | if (!ret) { |
1223 | error_setg(errp, |
1224 | "Snapshot with id '%s' and name '%s' does not exist on " |
1225 | "device '%s'" , |
1226 | STR_OR_NULL(id), STR_OR_NULL(name), device); |
1227 | goto out_aio_context; |
1228 | } |
1229 | |
1230 | bdrv_snapshot_delete(bs, id, name, &local_err); |
1231 | if (local_err) { |
1232 | error_propagate(errp, local_err); |
1233 | goto out_aio_context; |
1234 | } |
1235 | |
1236 | aio_context_release(aio_context); |
1237 | |
1238 | info = g_new0(SnapshotInfo, 1); |
1239 | info->id = g_strdup(sn.id_str); |
1240 | info->name = g_strdup(sn.name); |
1241 | info->date_nsec = sn.date_nsec; |
1242 | info->date_sec = sn.date_sec; |
1243 | info->vm_state_size = sn.vm_state_size; |
1244 | info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000; |
1245 | info->vm_clock_sec = sn.vm_clock_nsec / 1000000000; |
1246 | |
1247 | return info; |
1248 | |
1249 | out_aio_context: |
1250 | aio_context_release(aio_context); |
1251 | return NULL; |
1252 | } |
1253 | |
1254 | /** |
1255 | * block_dirty_bitmap_lookup: |
1256 | * Return a dirty bitmap (if present), after validating |
1257 | * the node reference and bitmap names. |
1258 | * |
1259 | * @node: The name of the BDS node to search for bitmaps |
1260 | * @name: The name of the bitmap to search for |
1261 | * @pbs: Output pointer for BDS lookup, if desired. Can be NULL. |
1262 | * @errp: Output pointer for error information. Can be NULL. |
1263 | * |
1264 | * @return: A bitmap object on success, or NULL on failure. |
1265 | */ |
1266 | static BdrvDirtyBitmap *block_dirty_bitmap_lookup(const char *node, |
1267 | const char *name, |
1268 | BlockDriverState **pbs, |
1269 | Error **errp) |
1270 | { |
1271 | BlockDriverState *bs; |
1272 | BdrvDirtyBitmap *bitmap; |
1273 | |
1274 | if (!node) { |
1275 | error_setg(errp, "Node cannot be NULL" ); |
1276 | return NULL; |
1277 | } |
1278 | if (!name) { |
1279 | error_setg(errp, "Bitmap name cannot be NULL" ); |
1280 | return NULL; |
1281 | } |
1282 | bs = bdrv_lookup_bs(node, node, NULL); |
1283 | if (!bs) { |
1284 | error_setg(errp, "Node '%s' not found" , node); |
1285 | return NULL; |
1286 | } |
1287 | |
1288 | bitmap = bdrv_find_dirty_bitmap(bs, name); |
1289 | if (!bitmap) { |
1290 | error_setg(errp, "Dirty bitmap '%s' not found" , name); |
1291 | return NULL; |
1292 | } |
1293 | |
1294 | if (pbs) { |
1295 | *pbs = bs; |
1296 | } |
1297 | |
1298 | return bitmap; |
1299 | } |
1300 | |
1301 | /* New and old BlockDriverState structs for atomic group operations */ |
1302 | |
1303 | typedef struct BlkActionState BlkActionState; |
1304 | |
1305 | /** |
1306 | * BlkActionOps: |
1307 | * Table of operations that define an Action. |
1308 | * |
1309 | * @instance_size: Size of state struct, in bytes. |
1310 | * @prepare: Prepare the work, must NOT be NULL. |
1311 | * @commit: Commit the changes, can be NULL. |
1312 | * @abort: Abort the changes on fail, can be NULL. |
1313 | * @clean: Clean up resources after all transaction actions have called |
1314 | * commit() or abort(). Can be NULL. |
1315 | * |
1316 | * Only prepare() may fail. In a single transaction, only one of commit() or |
1317 | * abort() will be called. clean() will always be called if it is present. |
1318 | */ |
1319 | typedef struct BlkActionOps { |
1320 | size_t instance_size; |
1321 | void (*prepare)(BlkActionState *common, Error **errp); |
1322 | void (*commit)(BlkActionState *common); |
1323 | void (*abort)(BlkActionState *common); |
1324 | void (*clean)(BlkActionState *common); |
1325 | } BlkActionOps; |
1326 | |
1327 | /** |
1328 | * BlkActionState: |
1329 | * Describes one Action's state within a Transaction. |
1330 | * |
1331 | * @action: QAPI-defined enum identifying which Action to perform. |
1332 | * @ops: Table of ActionOps this Action can perform. |
1333 | * @block_job_txn: Transaction which this action belongs to. |
1334 | * @entry: List membership for all Actions in this Transaction. |
1335 | * |
1336 | * This structure must be arranged as first member in a subclassed type, |
1337 | * assuming that the compiler will also arrange it to the same offsets as the |
1338 | * base class. |
1339 | */ |
1340 | struct BlkActionState { |
1341 | TransactionAction *action; |
1342 | const BlkActionOps *ops; |
1343 | JobTxn *block_job_txn; |
1344 | TransactionProperties *txn_props; |
1345 | QTAILQ_ENTRY(BlkActionState) entry; |
1346 | }; |
1347 | |
1348 | /* internal snapshot private data */ |
1349 | typedef struct InternalSnapshotState { |
1350 | BlkActionState common; |
1351 | BlockDriverState *bs; |
1352 | QEMUSnapshotInfo sn; |
1353 | bool created; |
1354 | } InternalSnapshotState; |
1355 | |
1356 | |
1357 | static int action_check_completion_mode(BlkActionState *s, Error **errp) |
1358 | { |
1359 | if (s->txn_props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) { |
1360 | error_setg(errp, |
1361 | "Action '%s' does not support Transaction property " |
1362 | "completion-mode = %s" , |
1363 | TransactionActionKind_str(s->action->type), |
1364 | ActionCompletionMode_str(s->txn_props->completion_mode)); |
1365 | return -1; |
1366 | } |
1367 | return 0; |
1368 | } |
1369 | |
1370 | static void internal_snapshot_prepare(BlkActionState *common, |
1371 | Error **errp) |
1372 | { |
1373 | Error *local_err = NULL; |
1374 | const char *device; |
1375 | const char *name; |
1376 | BlockDriverState *bs; |
1377 | QEMUSnapshotInfo old_sn, *sn; |
1378 | bool ret; |
1379 | qemu_timeval tv; |
1380 | BlockdevSnapshotInternal *internal; |
1381 | InternalSnapshotState *state; |
1382 | AioContext *aio_context; |
1383 | int ret1; |
1384 | |
1385 | g_assert(common->action->type == |
1386 | TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC); |
1387 | internal = common->action->u.blockdev_snapshot_internal_sync.data; |
1388 | state = DO_UPCAST(InternalSnapshotState, common, common); |
1389 | |
1390 | /* 1. parse input */ |
1391 | device = internal->device; |
1392 | name = internal->name; |
1393 | |
1394 | /* 2. check for validation */ |
1395 | if (action_check_completion_mode(common, errp) < 0) { |
1396 | return; |
1397 | } |
1398 | |
1399 | bs = qmp_get_root_bs(device, errp); |
1400 | if (!bs) { |
1401 | return; |
1402 | } |
1403 | |
1404 | aio_context = bdrv_get_aio_context(bs); |
1405 | aio_context_acquire(aio_context); |
1406 | |
1407 | state->bs = bs; |
1408 | |
1409 | /* Paired with .clean() */ |
1410 | bdrv_drained_begin(bs); |
1411 | |
1412 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, errp)) { |
1413 | goto out; |
1414 | } |
1415 | |
1416 | if (bdrv_is_read_only(bs)) { |
1417 | error_setg(errp, "Device '%s' is read only" , device); |
1418 | goto out; |
1419 | } |
1420 | |
1421 | if (!bdrv_can_snapshot(bs)) { |
1422 | error_setg(errp, "Block format '%s' used by device '%s' " |
1423 | "does not support internal snapshots" , |
1424 | bs->drv->format_name, device); |
1425 | goto out; |
1426 | } |
1427 | |
1428 | if (!strlen(name)) { |
1429 | error_setg(errp, "Name is empty" ); |
1430 | goto out; |
1431 | } |
1432 | |
1433 | /* check whether a snapshot with name exist */ |
1434 | ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn, |
1435 | &local_err); |
1436 | if (local_err) { |
1437 | error_propagate(errp, local_err); |
1438 | goto out; |
1439 | } else if (ret) { |
1440 | error_setg(errp, |
1441 | "Snapshot with name '%s' already exists on device '%s'" , |
1442 | name, device); |
1443 | goto out; |
1444 | } |
1445 | |
1446 | /* 3. take the snapshot */ |
1447 | sn = &state->sn; |
1448 | pstrcpy(sn->name, sizeof(sn->name), name); |
1449 | qemu_gettimeofday(&tv); |
1450 | sn->date_sec = tv.tv_sec; |
1451 | sn->date_nsec = tv.tv_usec * 1000; |
1452 | sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
1453 | |
1454 | ret1 = bdrv_snapshot_create(bs, sn); |
1455 | if (ret1 < 0) { |
1456 | error_setg_errno(errp, -ret1, |
1457 | "Failed to create snapshot '%s' on device '%s'" , |
1458 | name, device); |
1459 | goto out; |
1460 | } |
1461 | |
1462 | /* 4. succeed, mark a snapshot is created */ |
1463 | state->created = true; |
1464 | |
1465 | out: |
1466 | aio_context_release(aio_context); |
1467 | } |
1468 | |
1469 | static void internal_snapshot_abort(BlkActionState *common) |
1470 | { |
1471 | InternalSnapshotState *state = |
1472 | DO_UPCAST(InternalSnapshotState, common, common); |
1473 | BlockDriverState *bs = state->bs; |
1474 | QEMUSnapshotInfo *sn = &state->sn; |
1475 | AioContext *aio_context; |
1476 | Error *local_error = NULL; |
1477 | |
1478 | if (!state->created) { |
1479 | return; |
1480 | } |
1481 | |
1482 | aio_context = bdrv_get_aio_context(state->bs); |
1483 | aio_context_acquire(aio_context); |
1484 | |
1485 | if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) { |
1486 | error_reportf_err(local_error, |
1487 | "Failed to delete snapshot with id '%s' and " |
1488 | "name '%s' on device '%s' in abort: " , |
1489 | sn->id_str, sn->name, |
1490 | bdrv_get_device_name(bs)); |
1491 | } |
1492 | |
1493 | aio_context_release(aio_context); |
1494 | } |
1495 | |
1496 | static void internal_snapshot_clean(BlkActionState *common) |
1497 | { |
1498 | InternalSnapshotState *state = DO_UPCAST(InternalSnapshotState, |
1499 | common, common); |
1500 | AioContext *aio_context; |
1501 | |
1502 | if (!state->bs) { |
1503 | return; |
1504 | } |
1505 | |
1506 | aio_context = bdrv_get_aio_context(state->bs); |
1507 | aio_context_acquire(aio_context); |
1508 | |
1509 | bdrv_drained_end(state->bs); |
1510 | |
1511 | aio_context_release(aio_context); |
1512 | } |
1513 | |
1514 | /* external snapshot private data */ |
1515 | typedef struct ExternalSnapshotState { |
1516 | BlkActionState common; |
1517 | BlockDriverState *old_bs; |
1518 | BlockDriverState *new_bs; |
1519 | bool overlay_appended; |
1520 | } ExternalSnapshotState; |
1521 | |
1522 | static void external_snapshot_prepare(BlkActionState *common, |
1523 | Error **errp) |
1524 | { |
1525 | int flags = 0; |
1526 | QDict *options = NULL; |
1527 | Error *local_err = NULL; |
1528 | /* Device and node name of the image to generate the snapshot from */ |
1529 | const char *device; |
1530 | const char *node_name; |
1531 | /* Reference to the new image (for 'blockdev-snapshot') */ |
1532 | const char *snapshot_ref; |
1533 | /* File name of the new image (for 'blockdev-snapshot-sync') */ |
1534 | const char *new_image_file; |
1535 | ExternalSnapshotState *state = |
1536 | DO_UPCAST(ExternalSnapshotState, common, common); |
1537 | TransactionAction *action = common->action; |
1538 | AioContext *aio_context; |
1539 | int ret; |
1540 | |
1541 | /* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar |
1542 | * purpose but a different set of parameters */ |
1543 | switch (action->type) { |
1544 | case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT: |
1545 | { |
1546 | BlockdevSnapshot *s = action->u.blockdev_snapshot.data; |
1547 | device = s->node; |
1548 | node_name = s->node; |
1549 | new_image_file = NULL; |
1550 | snapshot_ref = s->overlay; |
1551 | } |
1552 | break; |
1553 | case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC: |
1554 | { |
1555 | BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data; |
1556 | device = s->has_device ? s->device : NULL; |
1557 | node_name = s->has_node_name ? s->node_name : NULL; |
1558 | new_image_file = s->snapshot_file; |
1559 | snapshot_ref = NULL; |
1560 | } |
1561 | break; |
1562 | default: |
1563 | g_assert_not_reached(); |
1564 | } |
1565 | |
1566 | /* start processing */ |
1567 | if (action_check_completion_mode(common, errp) < 0) { |
1568 | return; |
1569 | } |
1570 | |
1571 | state->old_bs = bdrv_lookup_bs(device, node_name, errp); |
1572 | if (!state->old_bs) { |
1573 | return; |
1574 | } |
1575 | |
1576 | aio_context = bdrv_get_aio_context(state->old_bs); |
1577 | aio_context_acquire(aio_context); |
1578 | |
1579 | /* Paired with .clean() */ |
1580 | bdrv_drained_begin(state->old_bs); |
1581 | |
1582 | if (!bdrv_is_inserted(state->old_bs)) { |
1583 | error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
1584 | goto out; |
1585 | } |
1586 | |
1587 | if (bdrv_op_is_blocked(state->old_bs, |
1588 | BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, errp)) { |
1589 | goto out; |
1590 | } |
1591 | |
1592 | if (!bdrv_is_read_only(state->old_bs)) { |
1593 | if (bdrv_flush(state->old_bs)) { |
1594 | error_setg(errp, QERR_IO_ERROR); |
1595 | goto out; |
1596 | } |
1597 | } |
1598 | |
1599 | if (!bdrv_is_first_non_filter(state->old_bs)) { |
1600 | error_setg(errp, QERR_FEATURE_DISABLED, "snapshot" ); |
1601 | goto out; |
1602 | } |
1603 | |
1604 | if (action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC) { |
1605 | BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data; |
1606 | const char *format = s->has_format ? s->format : "qcow2" ; |
1607 | enum NewImageMode mode; |
1608 | const char *snapshot_node_name = |
1609 | s->has_snapshot_node_name ? s->snapshot_node_name : NULL; |
1610 | |
1611 | if (node_name && !snapshot_node_name) { |
1612 | error_setg(errp, "New overlay node name missing" ); |
1613 | goto out; |
1614 | } |
1615 | |
1616 | if (snapshot_node_name && |
1617 | bdrv_lookup_bs(snapshot_node_name, snapshot_node_name, NULL)) { |
1618 | error_setg(errp, "New overlay node name already in use" ); |
1619 | goto out; |
1620 | } |
1621 | |
1622 | flags = state->old_bs->open_flags; |
1623 | flags &= ~(BDRV_O_SNAPSHOT | BDRV_O_COPY_ON_READ); |
1624 | flags |= BDRV_O_NO_BACKING; |
1625 | |
1626 | /* create new image w/backing file */ |
1627 | mode = s->has_mode ? s->mode : NEW_IMAGE_MODE_ABSOLUTE_PATHS; |
1628 | if (mode != NEW_IMAGE_MODE_EXISTING) { |
1629 | int64_t size = bdrv_getlength(state->old_bs); |
1630 | if (size < 0) { |
1631 | error_setg_errno(errp, -size, "bdrv_getlength failed" ); |
1632 | goto out; |
1633 | } |
1634 | bdrv_refresh_filename(state->old_bs); |
1635 | bdrv_img_create(new_image_file, format, |
1636 | state->old_bs->filename, |
1637 | state->old_bs->drv->format_name, |
1638 | NULL, size, flags, false, &local_err); |
1639 | if (local_err) { |
1640 | error_propagate(errp, local_err); |
1641 | goto out; |
1642 | } |
1643 | } |
1644 | |
1645 | options = qdict_new(); |
1646 | if (snapshot_node_name) { |
1647 | qdict_put_str(options, "node-name" , snapshot_node_name); |
1648 | } |
1649 | qdict_put_str(options, "driver" , format); |
1650 | } |
1651 | |
1652 | state->new_bs = bdrv_open(new_image_file, snapshot_ref, options, flags, |
1653 | errp); |
1654 | /* We will manually add the backing_hd field to the bs later */ |
1655 | if (!state->new_bs) { |
1656 | goto out; |
1657 | } |
1658 | |
1659 | if (bdrv_has_blk(state->new_bs)) { |
1660 | error_setg(errp, "The overlay is already in use" ); |
1661 | goto out; |
1662 | } |
1663 | |
1664 | if (bdrv_op_is_blocked(state->new_bs, BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, |
1665 | errp)) { |
1666 | goto out; |
1667 | } |
1668 | |
1669 | if (state->new_bs->backing != NULL) { |
1670 | error_setg(errp, "The overlay already has a backing image" ); |
1671 | goto out; |
1672 | } |
1673 | |
1674 | if (!state->new_bs->drv->supports_backing) { |
1675 | error_setg(errp, "The overlay does not support backing images" ); |
1676 | goto out; |
1677 | } |
1678 | |
1679 | ret = bdrv_try_set_aio_context(state->new_bs, aio_context, errp); |
1680 | if (ret < 0) { |
1681 | goto out; |
1682 | } |
1683 | |
1684 | /* This removes our old bs and adds the new bs. This is an operation that |
1685 | * can fail, so we need to do it in .prepare; undoing it for abort is |
1686 | * always possible. */ |
1687 | bdrv_ref(state->new_bs); |
1688 | bdrv_append(state->new_bs, state->old_bs, &local_err); |
1689 | if (local_err) { |
1690 | error_propagate(errp, local_err); |
1691 | goto out; |
1692 | } |
1693 | state->overlay_appended = true; |
1694 | |
1695 | out: |
1696 | aio_context_release(aio_context); |
1697 | } |
1698 | |
1699 | static void external_snapshot_commit(BlkActionState *common) |
1700 | { |
1701 | ExternalSnapshotState *state = |
1702 | DO_UPCAST(ExternalSnapshotState, common, common); |
1703 | AioContext *aio_context; |
1704 | |
1705 | aio_context = bdrv_get_aio_context(state->old_bs); |
1706 | aio_context_acquire(aio_context); |
1707 | |
1708 | /* We don't need (or want) to use the transactional |
1709 | * bdrv_reopen_multiple() across all the entries at once, because we |
1710 | * don't want to abort all of them if one of them fails the reopen */ |
1711 | if (!atomic_read(&state->old_bs->copy_on_read)) { |
1712 | bdrv_reopen_set_read_only(state->old_bs, true, NULL); |
1713 | } |
1714 | |
1715 | aio_context_release(aio_context); |
1716 | } |
1717 | |
1718 | static void external_snapshot_abort(BlkActionState *common) |
1719 | { |
1720 | ExternalSnapshotState *state = |
1721 | DO_UPCAST(ExternalSnapshotState, common, common); |
1722 | if (state->new_bs) { |
1723 | if (state->overlay_appended) { |
1724 | AioContext *aio_context; |
1725 | |
1726 | aio_context = bdrv_get_aio_context(state->old_bs); |
1727 | aio_context_acquire(aio_context); |
1728 | |
1729 | bdrv_ref(state->old_bs); /* we can't let bdrv_set_backind_hd() |
1730 | close state->old_bs; we need it */ |
1731 | bdrv_set_backing_hd(state->new_bs, NULL, &error_abort); |
1732 | bdrv_replace_node(state->new_bs, state->old_bs, &error_abort); |
1733 | bdrv_unref(state->old_bs); /* bdrv_replace_node() ref'ed old_bs */ |
1734 | |
1735 | aio_context_release(aio_context); |
1736 | } |
1737 | } |
1738 | } |
1739 | |
1740 | static void external_snapshot_clean(BlkActionState *common) |
1741 | { |
1742 | ExternalSnapshotState *state = |
1743 | DO_UPCAST(ExternalSnapshotState, common, common); |
1744 | AioContext *aio_context; |
1745 | |
1746 | if (!state->old_bs) { |
1747 | return; |
1748 | } |
1749 | |
1750 | aio_context = bdrv_get_aio_context(state->old_bs); |
1751 | aio_context_acquire(aio_context); |
1752 | |
1753 | bdrv_drained_end(state->old_bs); |
1754 | bdrv_unref(state->new_bs); |
1755 | |
1756 | aio_context_release(aio_context); |
1757 | } |
1758 | |
1759 | typedef struct DriveBackupState { |
1760 | BlkActionState common; |
1761 | BlockDriverState *bs; |
1762 | BlockJob *job; |
1763 | } DriveBackupState; |
1764 | |
1765 | static BlockJob *do_drive_backup(DriveBackup *backup, JobTxn *txn, |
1766 | Error **errp); |
1767 | |
1768 | static void drive_backup_prepare(BlkActionState *common, Error **errp) |
1769 | { |
1770 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); |
1771 | BlockDriverState *bs; |
1772 | DriveBackup *backup; |
1773 | AioContext *aio_context; |
1774 | Error *local_err = NULL; |
1775 | |
1776 | assert(common->action->type == TRANSACTION_ACTION_KIND_DRIVE_BACKUP); |
1777 | backup = common->action->u.drive_backup.data; |
1778 | |
1779 | bs = bdrv_lookup_bs(backup->device, backup->device, errp); |
1780 | if (!bs) { |
1781 | return; |
1782 | } |
1783 | |
1784 | aio_context = bdrv_get_aio_context(bs); |
1785 | aio_context_acquire(aio_context); |
1786 | |
1787 | /* Paired with .clean() */ |
1788 | bdrv_drained_begin(bs); |
1789 | |
1790 | state->bs = bs; |
1791 | |
1792 | state->job = do_drive_backup(backup, common->block_job_txn, &local_err); |
1793 | if (local_err) { |
1794 | error_propagate(errp, local_err); |
1795 | goto out; |
1796 | } |
1797 | |
1798 | out: |
1799 | aio_context_release(aio_context); |
1800 | } |
1801 | |
1802 | static void drive_backup_commit(BlkActionState *common) |
1803 | { |
1804 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); |
1805 | AioContext *aio_context; |
1806 | |
1807 | aio_context = bdrv_get_aio_context(state->bs); |
1808 | aio_context_acquire(aio_context); |
1809 | |
1810 | assert(state->job); |
1811 | job_start(&state->job->job); |
1812 | |
1813 | aio_context_release(aio_context); |
1814 | } |
1815 | |
1816 | static void drive_backup_abort(BlkActionState *common) |
1817 | { |
1818 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); |
1819 | |
1820 | if (state->job) { |
1821 | AioContext *aio_context; |
1822 | |
1823 | aio_context = bdrv_get_aio_context(state->bs); |
1824 | aio_context_acquire(aio_context); |
1825 | |
1826 | job_cancel_sync(&state->job->job); |
1827 | |
1828 | aio_context_release(aio_context); |
1829 | } |
1830 | } |
1831 | |
1832 | static void drive_backup_clean(BlkActionState *common) |
1833 | { |
1834 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); |
1835 | AioContext *aio_context; |
1836 | |
1837 | if (!state->bs) { |
1838 | return; |
1839 | } |
1840 | |
1841 | aio_context = bdrv_get_aio_context(state->bs); |
1842 | aio_context_acquire(aio_context); |
1843 | |
1844 | bdrv_drained_end(state->bs); |
1845 | |
1846 | aio_context_release(aio_context); |
1847 | } |
1848 | |
1849 | typedef struct BlockdevBackupState { |
1850 | BlkActionState common; |
1851 | BlockDriverState *bs; |
1852 | BlockJob *job; |
1853 | } BlockdevBackupState; |
1854 | |
1855 | static BlockJob *do_blockdev_backup(BlockdevBackup *backup, JobTxn *txn, |
1856 | Error **errp); |
1857 | |
1858 | static void blockdev_backup_prepare(BlkActionState *common, Error **errp) |
1859 | { |
1860 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); |
1861 | BlockdevBackup *backup; |
1862 | BlockDriverState *bs, *target; |
1863 | AioContext *aio_context; |
1864 | Error *local_err = NULL; |
1865 | |
1866 | assert(common->action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP); |
1867 | backup = common->action->u.blockdev_backup.data; |
1868 | |
1869 | bs = bdrv_lookup_bs(backup->device, backup->device, errp); |
1870 | if (!bs) { |
1871 | return; |
1872 | } |
1873 | |
1874 | target = bdrv_lookup_bs(backup->target, backup->target, errp); |
1875 | if (!target) { |
1876 | return; |
1877 | } |
1878 | |
1879 | aio_context = bdrv_get_aio_context(bs); |
1880 | aio_context_acquire(aio_context); |
1881 | state->bs = bs; |
1882 | |
1883 | /* Paired with .clean() */ |
1884 | bdrv_drained_begin(state->bs); |
1885 | |
1886 | state->job = do_blockdev_backup(backup, common->block_job_txn, &local_err); |
1887 | if (local_err) { |
1888 | error_propagate(errp, local_err); |
1889 | goto out; |
1890 | } |
1891 | |
1892 | out: |
1893 | aio_context_release(aio_context); |
1894 | } |
1895 | |
1896 | static void blockdev_backup_commit(BlkActionState *common) |
1897 | { |
1898 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); |
1899 | AioContext *aio_context; |
1900 | |
1901 | aio_context = bdrv_get_aio_context(state->bs); |
1902 | aio_context_acquire(aio_context); |
1903 | |
1904 | assert(state->job); |
1905 | job_start(&state->job->job); |
1906 | |
1907 | aio_context_release(aio_context); |
1908 | } |
1909 | |
1910 | static void blockdev_backup_abort(BlkActionState *common) |
1911 | { |
1912 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); |
1913 | |
1914 | if (state->job) { |
1915 | AioContext *aio_context; |
1916 | |
1917 | aio_context = bdrv_get_aio_context(state->bs); |
1918 | aio_context_acquire(aio_context); |
1919 | |
1920 | job_cancel_sync(&state->job->job); |
1921 | |
1922 | aio_context_release(aio_context); |
1923 | } |
1924 | } |
1925 | |
1926 | static void blockdev_backup_clean(BlkActionState *common) |
1927 | { |
1928 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); |
1929 | AioContext *aio_context; |
1930 | |
1931 | if (!state->bs) { |
1932 | return; |
1933 | } |
1934 | |
1935 | aio_context = bdrv_get_aio_context(state->bs); |
1936 | aio_context_acquire(aio_context); |
1937 | |
1938 | bdrv_drained_end(state->bs); |
1939 | |
1940 | aio_context_release(aio_context); |
1941 | } |
1942 | |
1943 | typedef struct BlockDirtyBitmapState { |
1944 | BlkActionState common; |
1945 | BdrvDirtyBitmap *bitmap; |
1946 | BlockDriverState *bs; |
1947 | HBitmap *backup; |
1948 | bool prepared; |
1949 | bool was_enabled; |
1950 | } BlockDirtyBitmapState; |
1951 | |
1952 | static void block_dirty_bitmap_add_prepare(BlkActionState *common, |
1953 | Error **errp) |
1954 | { |
1955 | Error *local_err = NULL; |
1956 | BlockDirtyBitmapAdd *action; |
1957 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, |
1958 | common, common); |
1959 | |
1960 | if (action_check_completion_mode(common, errp) < 0) { |
1961 | return; |
1962 | } |
1963 | |
1964 | action = common->action->u.block_dirty_bitmap_add.data; |
1965 | /* AIO context taken and released within qmp_block_dirty_bitmap_add */ |
1966 | qmp_block_dirty_bitmap_add(action->node, action->name, |
1967 | action->has_granularity, action->granularity, |
1968 | action->has_persistent, action->persistent, |
1969 | action->has_autoload, action->autoload, |
1970 | action->has_disabled, action->disabled, |
1971 | &local_err); |
1972 | |
1973 | if (!local_err) { |
1974 | state->prepared = true; |
1975 | } else { |
1976 | error_propagate(errp, local_err); |
1977 | } |
1978 | } |
1979 | |
1980 | static void block_dirty_bitmap_add_abort(BlkActionState *common) |
1981 | { |
1982 | BlockDirtyBitmapAdd *action; |
1983 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, |
1984 | common, common); |
1985 | |
1986 | action = common->action->u.block_dirty_bitmap_add.data; |
1987 | /* Should not be able to fail: IF the bitmap was added via .prepare(), |
1988 | * then the node reference and bitmap name must have been valid. |
1989 | */ |
1990 | if (state->prepared) { |
1991 | qmp_block_dirty_bitmap_remove(action->node, action->name, &error_abort); |
1992 | } |
1993 | } |
1994 | |
1995 | static void block_dirty_bitmap_clear_prepare(BlkActionState *common, |
1996 | Error **errp) |
1997 | { |
1998 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, |
1999 | common, common); |
2000 | BlockDirtyBitmap *action; |
2001 | |
2002 | if (action_check_completion_mode(common, errp) < 0) { |
2003 | return; |
2004 | } |
2005 | |
2006 | action = common->action->u.block_dirty_bitmap_clear.data; |
2007 | state->bitmap = block_dirty_bitmap_lookup(action->node, |
2008 | action->name, |
2009 | &state->bs, |
2010 | errp); |
2011 | if (!state->bitmap) { |
2012 | return; |
2013 | } |
2014 | |
2015 | if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_DEFAULT, errp)) { |
2016 | return; |
2017 | } |
2018 | |
2019 | bdrv_clear_dirty_bitmap(state->bitmap, &state->backup); |
2020 | } |
2021 | |
2022 | static void block_dirty_bitmap_restore(BlkActionState *common) |
2023 | { |
2024 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, |
2025 | common, common); |
2026 | |
2027 | if (state->backup) { |
2028 | bdrv_restore_dirty_bitmap(state->bitmap, state->backup); |
2029 | } |
2030 | } |
2031 | |
2032 | static void block_dirty_bitmap_free_backup(BlkActionState *common) |
2033 | { |
2034 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, |
2035 | common, common); |
2036 | |
2037 | hbitmap_free(state->backup); |
2038 | } |
2039 | |
2040 | static void block_dirty_bitmap_enable_prepare(BlkActionState *common, |
2041 | Error **errp) |
2042 | { |
2043 | BlockDirtyBitmap *action; |
2044 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, |
2045 | common, common); |
2046 | |
2047 | if (action_check_completion_mode(common, errp) < 0) { |
2048 | return; |
2049 | } |
2050 | |
2051 | action = common->action->u.block_dirty_bitmap_enable.data; |
2052 | state->bitmap = block_dirty_bitmap_lookup(action->node, |
2053 | action->name, |
2054 | NULL, |
2055 | errp); |
2056 | if (!state->bitmap) { |
2057 | return; |
2058 | } |
2059 | |
2060 | if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_ALLOW_RO, errp)) { |
2061 | return; |
2062 | } |
2063 | |
2064 | state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap); |
2065 | bdrv_enable_dirty_bitmap(state->bitmap); |
2066 | } |
2067 | |
2068 | static void block_dirty_bitmap_enable_abort(BlkActionState *common) |
2069 | { |
2070 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, |
2071 | common, common); |
2072 | |
2073 | if (!state->was_enabled) { |
2074 | bdrv_disable_dirty_bitmap(state->bitmap); |
2075 | } |
2076 | } |
2077 | |
2078 | static void block_dirty_bitmap_disable_prepare(BlkActionState *common, |
2079 | Error **errp) |
2080 | { |
2081 | BlockDirtyBitmap *action; |
2082 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, |
2083 | common, common); |
2084 | |
2085 | if (action_check_completion_mode(common, errp) < 0) { |
2086 | return; |
2087 | } |
2088 | |
2089 | action = common->action->u.block_dirty_bitmap_disable.data; |
2090 | state->bitmap = block_dirty_bitmap_lookup(action->node, |
2091 | action->name, |
2092 | NULL, |
2093 | errp); |
2094 | if (!state->bitmap) { |
2095 | return; |
2096 | } |
2097 | |
2098 | if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_ALLOW_RO, errp)) { |
2099 | return; |
2100 | } |
2101 | |
2102 | state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap); |
2103 | bdrv_disable_dirty_bitmap(state->bitmap); |
2104 | } |
2105 | |
2106 | static void block_dirty_bitmap_disable_abort(BlkActionState *common) |
2107 | { |
2108 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, |
2109 | common, common); |
2110 | |
2111 | if (state->was_enabled) { |
2112 | bdrv_enable_dirty_bitmap(state->bitmap); |
2113 | } |
2114 | } |
2115 | |
2116 | static BdrvDirtyBitmap *do_block_dirty_bitmap_merge( |
2117 | const char *node, const char *target, |
2118 | BlockDirtyBitmapMergeSourceList *bitmaps, |
2119 | HBitmap **backup, Error **errp); |
2120 | |
2121 | static void block_dirty_bitmap_merge_prepare(BlkActionState *common, |
2122 | Error **errp) |
2123 | { |
2124 | BlockDirtyBitmapMerge *action; |
2125 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, |
2126 | common, common); |
2127 | |
2128 | if (action_check_completion_mode(common, errp) < 0) { |
2129 | return; |
2130 | } |
2131 | |
2132 | action = common->action->u.block_dirty_bitmap_merge.data; |
2133 | |
2134 | state->bitmap = do_block_dirty_bitmap_merge(action->node, action->target, |
2135 | action->bitmaps, &state->backup, |
2136 | errp); |
2137 | } |
2138 | |
2139 | static BdrvDirtyBitmap *do_block_dirty_bitmap_remove( |
2140 | const char *node, const char *name, bool release, |
2141 | BlockDriverState **bitmap_bs, Error **errp); |
2142 | |
2143 | static void block_dirty_bitmap_remove_prepare(BlkActionState *common, |
2144 | Error **errp) |
2145 | { |
2146 | BlockDirtyBitmap *action; |
2147 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, |
2148 | common, common); |
2149 | |
2150 | if (action_check_completion_mode(common, errp) < 0) { |
2151 | return; |
2152 | } |
2153 | |
2154 | action = common->action->u.block_dirty_bitmap_remove.data; |
2155 | |
2156 | state->bitmap = do_block_dirty_bitmap_remove(action->node, action->name, |
2157 | false, &state->bs, errp); |
2158 | if (state->bitmap) { |
2159 | bdrv_dirty_bitmap_skip_store(state->bitmap, true); |
2160 | bdrv_dirty_bitmap_set_busy(state->bitmap, true); |
2161 | } |
2162 | } |
2163 | |
2164 | static void block_dirty_bitmap_remove_abort(BlkActionState *common) |
2165 | { |
2166 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, |
2167 | common, common); |
2168 | |
2169 | if (state->bitmap) { |
2170 | bdrv_dirty_bitmap_skip_store(state->bitmap, false); |
2171 | bdrv_dirty_bitmap_set_busy(state->bitmap, false); |
2172 | } |
2173 | } |
2174 | |
2175 | static void block_dirty_bitmap_remove_commit(BlkActionState *common) |
2176 | { |
2177 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, |
2178 | common, common); |
2179 | |
2180 | bdrv_dirty_bitmap_set_busy(state->bitmap, false); |
2181 | bdrv_release_dirty_bitmap(state->bs, state->bitmap); |
2182 | } |
2183 | |
2184 | static void abort_prepare(BlkActionState *common, Error **errp) |
2185 | { |
2186 | error_setg(errp, "Transaction aborted using Abort action" ); |
2187 | } |
2188 | |
2189 | static void abort_commit(BlkActionState *common) |
2190 | { |
2191 | g_assert_not_reached(); /* this action never succeeds */ |
2192 | } |
2193 | |
2194 | static const BlkActionOps actions[] = { |
2195 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT] = { |
2196 | .instance_size = sizeof(ExternalSnapshotState), |
2197 | .prepare = external_snapshot_prepare, |
2198 | .commit = external_snapshot_commit, |
2199 | .abort = external_snapshot_abort, |
2200 | .clean = external_snapshot_clean, |
2201 | }, |
2202 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = { |
2203 | .instance_size = sizeof(ExternalSnapshotState), |
2204 | .prepare = external_snapshot_prepare, |
2205 | .commit = external_snapshot_commit, |
2206 | .abort = external_snapshot_abort, |
2207 | .clean = external_snapshot_clean, |
2208 | }, |
2209 | [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = { |
2210 | .instance_size = sizeof(DriveBackupState), |
2211 | .prepare = drive_backup_prepare, |
2212 | .commit = drive_backup_commit, |
2213 | .abort = drive_backup_abort, |
2214 | .clean = drive_backup_clean, |
2215 | }, |
2216 | [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP] = { |
2217 | .instance_size = sizeof(BlockdevBackupState), |
2218 | .prepare = blockdev_backup_prepare, |
2219 | .commit = blockdev_backup_commit, |
2220 | .abort = blockdev_backup_abort, |
2221 | .clean = blockdev_backup_clean, |
2222 | }, |
2223 | [TRANSACTION_ACTION_KIND_ABORT] = { |
2224 | .instance_size = sizeof(BlkActionState), |
2225 | .prepare = abort_prepare, |
2226 | .commit = abort_commit, |
2227 | }, |
2228 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = { |
2229 | .instance_size = sizeof(InternalSnapshotState), |
2230 | .prepare = internal_snapshot_prepare, |
2231 | .abort = internal_snapshot_abort, |
2232 | .clean = internal_snapshot_clean, |
2233 | }, |
2234 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD] = { |
2235 | .instance_size = sizeof(BlockDirtyBitmapState), |
2236 | .prepare = block_dirty_bitmap_add_prepare, |
2237 | .abort = block_dirty_bitmap_add_abort, |
2238 | }, |
2239 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR] = { |
2240 | .instance_size = sizeof(BlockDirtyBitmapState), |
2241 | .prepare = block_dirty_bitmap_clear_prepare, |
2242 | .commit = block_dirty_bitmap_free_backup, |
2243 | .abort = block_dirty_bitmap_restore, |
2244 | }, |
2245 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ENABLE] = { |
2246 | .instance_size = sizeof(BlockDirtyBitmapState), |
2247 | .prepare = block_dirty_bitmap_enable_prepare, |
2248 | .abort = block_dirty_bitmap_enable_abort, |
2249 | }, |
2250 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_DISABLE] = { |
2251 | .instance_size = sizeof(BlockDirtyBitmapState), |
2252 | .prepare = block_dirty_bitmap_disable_prepare, |
2253 | .abort = block_dirty_bitmap_disable_abort, |
2254 | }, |
2255 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_MERGE] = { |
2256 | .instance_size = sizeof(BlockDirtyBitmapState), |
2257 | .prepare = block_dirty_bitmap_merge_prepare, |
2258 | .commit = block_dirty_bitmap_free_backup, |
2259 | .abort = block_dirty_bitmap_restore, |
2260 | }, |
2261 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_REMOVE] = { |
2262 | .instance_size = sizeof(BlockDirtyBitmapState), |
2263 | .prepare = block_dirty_bitmap_remove_prepare, |
2264 | .commit = block_dirty_bitmap_remove_commit, |
2265 | .abort = block_dirty_bitmap_remove_abort, |
2266 | }, |
2267 | /* Where are transactions for MIRROR, COMMIT and STREAM? |
2268 | * Although these blockjobs use transaction callbacks like the backup job, |
2269 | * these jobs do not necessarily adhere to transaction semantics. |
2270 | * These jobs may not fully undo all of their actions on abort, nor do they |
2271 | * necessarily work in transactions with more than one job in them. |
2272 | */ |
2273 | }; |
2274 | |
2275 | /** |
2276 | * Allocate a TransactionProperties structure if necessary, and fill |
2277 | * that structure with desired defaults if they are unset. |
2278 | */ |
2279 | static TransactionProperties *get_transaction_properties( |
2280 | TransactionProperties *props) |
2281 | { |
2282 | if (!props) { |
2283 | props = g_new0(TransactionProperties, 1); |
2284 | } |
2285 | |
2286 | if (!props->has_completion_mode) { |
2287 | props->has_completion_mode = true; |
2288 | props->completion_mode = ACTION_COMPLETION_MODE_INDIVIDUAL; |
2289 | } |
2290 | |
2291 | return props; |
2292 | } |
2293 | |
2294 | /* |
2295 | * 'Atomic' group operations. The operations are performed as a set, and if |
2296 | * any fail then we roll back all operations in the group. |
2297 | */ |
2298 | void qmp_transaction(TransactionActionList *dev_list, |
2299 | bool has_props, |
2300 | struct TransactionProperties *props, |
2301 | Error **errp) |
2302 | { |
2303 | TransactionActionList *dev_entry = dev_list; |
2304 | JobTxn *block_job_txn = NULL; |
2305 | BlkActionState *state, *next; |
2306 | Error *local_err = NULL; |
2307 | |
2308 | QTAILQ_HEAD(, BlkActionState) snap_bdrv_states; |
2309 | QTAILQ_INIT(&snap_bdrv_states); |
2310 | |
2311 | /* Does this transaction get canceled as a group on failure? |
2312 | * If not, we don't really need to make a JobTxn. |
2313 | */ |
2314 | props = get_transaction_properties(props); |
2315 | if (props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) { |
2316 | block_job_txn = job_txn_new(); |
2317 | } |
2318 | |
2319 | /* drain all i/o before any operations */ |
2320 | bdrv_drain_all(); |
2321 | |
2322 | /* We don't do anything in this loop that commits us to the operations */ |
2323 | while (NULL != dev_entry) { |
2324 | TransactionAction *dev_info = NULL; |
2325 | const BlkActionOps *ops; |
2326 | |
2327 | dev_info = dev_entry->value; |
2328 | dev_entry = dev_entry->next; |
2329 | |
2330 | assert(dev_info->type < ARRAY_SIZE(actions)); |
2331 | |
2332 | ops = &actions[dev_info->type]; |
2333 | assert(ops->instance_size > 0); |
2334 | |
2335 | state = g_malloc0(ops->instance_size); |
2336 | state->ops = ops; |
2337 | state->action = dev_info; |
2338 | state->block_job_txn = block_job_txn; |
2339 | state->txn_props = props; |
2340 | QTAILQ_INSERT_TAIL(&snap_bdrv_states, state, entry); |
2341 | |
2342 | state->ops->prepare(state, &local_err); |
2343 | if (local_err) { |
2344 | error_propagate(errp, local_err); |
2345 | goto delete_and_fail; |
2346 | } |
2347 | } |
2348 | |
2349 | QTAILQ_FOREACH(state, &snap_bdrv_states, entry) { |
2350 | if (state->ops->commit) { |
2351 | state->ops->commit(state); |
2352 | } |
2353 | } |
2354 | |
2355 | /* success */ |
2356 | goto exit; |
2357 | |
2358 | delete_and_fail: |
2359 | /* failure, and it is all-or-none; roll back all operations */ |
2360 | QTAILQ_FOREACH_REVERSE(state, &snap_bdrv_states, entry) { |
2361 | if (state->ops->abort) { |
2362 | state->ops->abort(state); |
2363 | } |
2364 | } |
2365 | exit: |
2366 | QTAILQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) { |
2367 | if (state->ops->clean) { |
2368 | state->ops->clean(state); |
2369 | } |
2370 | g_free(state); |
2371 | } |
2372 | if (!has_props) { |
2373 | qapi_free_TransactionProperties(props); |
2374 | } |
2375 | job_txn_unref(block_job_txn); |
2376 | } |
2377 | |
2378 | void qmp_eject(bool has_device, const char *device, |
2379 | bool has_id, const char *id, |
2380 | bool has_force, bool force, Error **errp) |
2381 | { |
2382 | Error *local_err = NULL; |
2383 | int rc; |
2384 | |
2385 | if (!has_force) { |
2386 | force = false; |
2387 | } |
2388 | |
2389 | rc = do_open_tray(has_device ? device : NULL, |
2390 | has_id ? id : NULL, |
2391 | force, &local_err); |
2392 | if (rc && rc != -ENOSYS) { |
2393 | error_propagate(errp, local_err); |
2394 | return; |
2395 | } |
2396 | error_free(local_err); |
2397 | |
2398 | blockdev_remove_medium(has_device, device, has_id, id, errp); |
2399 | } |
2400 | |
2401 | void qmp_block_passwd(bool has_device, const char *device, |
2402 | bool has_node_name, const char *node_name, |
2403 | const char *password, Error **errp) |
2404 | { |
2405 | error_setg(errp, |
2406 | "Setting block passwords directly is no longer supported" ); |
2407 | } |
2408 | |
2409 | /* |
2410 | * Attempt to open the tray of @device. |
2411 | * If @force, ignore its tray lock. |
2412 | * Else, if the tray is locked, don't open it, but ask the guest to open it. |
2413 | * On error, store an error through @errp and return -errno. |
2414 | * If @device does not exist, return -ENODEV. |
2415 | * If it has no removable media, return -ENOTSUP. |
2416 | * If it has no tray, return -ENOSYS. |
2417 | * If the guest was asked to open the tray, return -EINPROGRESS. |
2418 | * Else, return 0. |
2419 | */ |
2420 | static int do_open_tray(const char *blk_name, const char *qdev_id, |
2421 | bool force, Error **errp) |
2422 | { |
2423 | BlockBackend *blk; |
2424 | const char *device = qdev_id ?: blk_name; |
2425 | bool locked; |
2426 | |
2427 | blk = qmp_get_blk(blk_name, qdev_id, errp); |
2428 | if (!blk) { |
2429 | return -ENODEV; |
2430 | } |
2431 | |
2432 | if (!blk_dev_has_removable_media(blk)) { |
2433 | error_setg(errp, "Device '%s' is not removable" , device); |
2434 | return -ENOTSUP; |
2435 | } |
2436 | |
2437 | if (!blk_dev_has_tray(blk)) { |
2438 | error_setg(errp, "Device '%s' does not have a tray" , device); |
2439 | return -ENOSYS; |
2440 | } |
2441 | |
2442 | if (blk_dev_is_tray_open(blk)) { |
2443 | return 0; |
2444 | } |
2445 | |
2446 | locked = blk_dev_is_medium_locked(blk); |
2447 | if (locked) { |
2448 | blk_dev_eject_request(blk, force); |
2449 | } |
2450 | |
2451 | if (!locked || force) { |
2452 | blk_dev_change_media_cb(blk, false, &error_abort); |
2453 | } |
2454 | |
2455 | if (locked && !force) { |
2456 | error_setg(errp, "Device '%s' is locked and force was not specified, " |
2457 | "wait for tray to open and try again" , device); |
2458 | return -EINPROGRESS; |
2459 | } |
2460 | |
2461 | return 0; |
2462 | } |
2463 | |
2464 | void qmp_blockdev_open_tray(bool has_device, const char *device, |
2465 | bool has_id, const char *id, |
2466 | bool has_force, bool force, |
2467 | Error **errp) |
2468 | { |
2469 | Error *local_err = NULL; |
2470 | int rc; |
2471 | |
2472 | if (!has_force) { |
2473 | force = false; |
2474 | } |
2475 | rc = do_open_tray(has_device ? device : NULL, |
2476 | has_id ? id : NULL, |
2477 | force, &local_err); |
2478 | if (rc && rc != -ENOSYS && rc != -EINPROGRESS) { |
2479 | error_propagate(errp, local_err); |
2480 | return; |
2481 | } |
2482 | error_free(local_err); |
2483 | } |
2484 | |
2485 | void qmp_blockdev_close_tray(bool has_device, const char *device, |
2486 | bool has_id, const char *id, |
2487 | Error **errp) |
2488 | { |
2489 | BlockBackend *blk; |
2490 | Error *local_err = NULL; |
2491 | |
2492 | device = has_device ? device : NULL; |
2493 | id = has_id ? id : NULL; |
2494 | |
2495 | blk = qmp_get_blk(device, id, errp); |
2496 | if (!blk) { |
2497 | return; |
2498 | } |
2499 | |
2500 | if (!blk_dev_has_removable_media(blk)) { |
2501 | error_setg(errp, "Device '%s' is not removable" , device ?: id); |
2502 | return; |
2503 | } |
2504 | |
2505 | if (!blk_dev_has_tray(blk)) { |
2506 | /* Ignore this command on tray-less devices */ |
2507 | return; |
2508 | } |
2509 | |
2510 | if (!blk_dev_is_tray_open(blk)) { |
2511 | return; |
2512 | } |
2513 | |
2514 | blk_dev_change_media_cb(blk, true, &local_err); |
2515 | if (local_err) { |
2516 | error_propagate(errp, local_err); |
2517 | return; |
2518 | } |
2519 | } |
2520 | |
2521 | static void blockdev_remove_medium(bool has_device, const char *device, |
2522 | bool has_id, const char *id, Error **errp) |
2523 | { |
2524 | BlockBackend *blk; |
2525 | BlockDriverState *bs; |
2526 | AioContext *aio_context; |
2527 | bool has_attached_device; |
2528 | |
2529 | device = has_device ? device : NULL; |
2530 | id = has_id ? id : NULL; |
2531 | |
2532 | blk = qmp_get_blk(device, id, errp); |
2533 | if (!blk) { |
2534 | return; |
2535 | } |
2536 | |
2537 | /* For BBs without a device, we can exchange the BDS tree at will */ |
2538 | has_attached_device = blk_get_attached_dev(blk); |
2539 | |
2540 | if (has_attached_device && !blk_dev_has_removable_media(blk)) { |
2541 | error_setg(errp, "Device '%s' is not removable" , device ?: id); |
2542 | return; |
2543 | } |
2544 | |
2545 | if (has_attached_device && blk_dev_has_tray(blk) && |
2546 | !blk_dev_is_tray_open(blk)) |
2547 | { |
2548 | error_setg(errp, "Tray of device '%s' is not open" , device ?: id); |
2549 | return; |
2550 | } |
2551 | |
2552 | bs = blk_bs(blk); |
2553 | if (!bs) { |
2554 | return; |
2555 | } |
2556 | |
2557 | aio_context = bdrv_get_aio_context(bs); |
2558 | aio_context_acquire(aio_context); |
2559 | |
2560 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_EJECT, errp)) { |
2561 | goto out; |
2562 | } |
2563 | |
2564 | blk_remove_bs(blk); |
2565 | |
2566 | if (!blk_dev_has_tray(blk)) { |
2567 | /* For tray-less devices, blockdev-open-tray is a no-op (or may not be |
2568 | * called at all); therefore, the medium needs to be ejected here. |
2569 | * Do it after blk_remove_bs() so blk_is_inserted(blk) returns the @load |
2570 | * value passed here (i.e. false). */ |
2571 | blk_dev_change_media_cb(blk, false, &error_abort); |
2572 | } |
2573 | |
2574 | out: |
2575 | aio_context_release(aio_context); |
2576 | } |
2577 | |
2578 | void qmp_blockdev_remove_medium(const char *id, Error **errp) |
2579 | { |
2580 | blockdev_remove_medium(false, NULL, true, id, errp); |
2581 | } |
2582 | |
2583 | static void qmp_blockdev_insert_anon_medium(BlockBackend *blk, |
2584 | BlockDriverState *bs, Error **errp) |
2585 | { |
2586 | Error *local_err = NULL; |
2587 | bool has_device; |
2588 | int ret; |
2589 | |
2590 | /* For BBs without a device, we can exchange the BDS tree at will */ |
2591 | has_device = blk_get_attached_dev(blk); |
2592 | |
2593 | if (has_device && !blk_dev_has_removable_media(blk)) { |
2594 | error_setg(errp, "Device is not removable" ); |
2595 | return; |
2596 | } |
2597 | |
2598 | if (has_device && blk_dev_has_tray(blk) && !blk_dev_is_tray_open(blk)) { |
2599 | error_setg(errp, "Tray of the device is not open" ); |
2600 | return; |
2601 | } |
2602 | |
2603 | if (blk_bs(blk)) { |
2604 | error_setg(errp, "There already is a medium in the device" ); |
2605 | return; |
2606 | } |
2607 | |
2608 | ret = blk_insert_bs(blk, bs, errp); |
2609 | if (ret < 0) { |
2610 | return; |
2611 | } |
2612 | |
2613 | if (!blk_dev_has_tray(blk)) { |
2614 | /* For tray-less devices, blockdev-close-tray is a no-op (or may not be |
2615 | * called at all); therefore, the medium needs to be pushed into the |
2616 | * slot here. |
2617 | * Do it after blk_insert_bs() so blk_is_inserted(blk) returns the @load |
2618 | * value passed here (i.e. true). */ |
2619 | blk_dev_change_media_cb(blk, true, &local_err); |
2620 | if (local_err) { |
2621 | error_propagate(errp, local_err); |
2622 | blk_remove_bs(blk); |
2623 | return; |
2624 | } |
2625 | } |
2626 | } |
2627 | |
2628 | static void blockdev_insert_medium(bool has_device, const char *device, |
2629 | bool has_id, const char *id, |
2630 | const char *node_name, Error **errp) |
2631 | { |
2632 | BlockBackend *blk; |
2633 | BlockDriverState *bs; |
2634 | |
2635 | blk = qmp_get_blk(has_device ? device : NULL, |
2636 | has_id ? id : NULL, |
2637 | errp); |
2638 | if (!blk) { |
2639 | return; |
2640 | } |
2641 | |
2642 | bs = bdrv_find_node(node_name); |
2643 | if (!bs) { |
2644 | error_setg(errp, "Node '%s' not found" , node_name); |
2645 | return; |
2646 | } |
2647 | |
2648 | if (bdrv_has_blk(bs)) { |
2649 | error_setg(errp, "Node '%s' is already in use" , node_name); |
2650 | return; |
2651 | } |
2652 | |
2653 | qmp_blockdev_insert_anon_medium(blk, bs, errp); |
2654 | } |
2655 | |
2656 | void qmp_blockdev_insert_medium(const char *id, const char *node_name, |
2657 | Error **errp) |
2658 | { |
2659 | blockdev_insert_medium(false, NULL, true, id, node_name, errp); |
2660 | } |
2661 | |
2662 | void qmp_blockdev_change_medium(bool has_device, const char *device, |
2663 | bool has_id, const char *id, |
2664 | const char *filename, |
2665 | bool has_format, const char *format, |
2666 | bool has_read_only, |
2667 | BlockdevChangeReadOnlyMode read_only, |
2668 | Error **errp) |
2669 | { |
2670 | BlockBackend *blk; |
2671 | BlockDriverState *medium_bs = NULL; |
2672 | int bdrv_flags; |
2673 | bool detect_zeroes; |
2674 | int rc; |
2675 | QDict *options = NULL; |
2676 | Error *err = NULL; |
2677 | |
2678 | blk = qmp_get_blk(has_device ? device : NULL, |
2679 | has_id ? id : NULL, |
2680 | errp); |
2681 | if (!blk) { |
2682 | goto fail; |
2683 | } |
2684 | |
2685 | if (blk_bs(blk)) { |
2686 | blk_update_root_state(blk); |
2687 | } |
2688 | |
2689 | bdrv_flags = blk_get_open_flags_from_root_state(blk); |
2690 | bdrv_flags &= ~(BDRV_O_TEMPORARY | BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING | |
2691 | BDRV_O_PROTOCOL | BDRV_O_AUTO_RDONLY); |
2692 | |
2693 | if (!has_read_only) { |
2694 | read_only = BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN; |
2695 | } |
2696 | |
2697 | switch (read_only) { |
2698 | case BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN: |
2699 | break; |
2700 | |
2701 | case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_ONLY: |
2702 | bdrv_flags &= ~BDRV_O_RDWR; |
2703 | break; |
2704 | |
2705 | case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_WRITE: |
2706 | bdrv_flags |= BDRV_O_RDWR; |
2707 | break; |
2708 | |
2709 | default: |
2710 | abort(); |
2711 | } |
2712 | |
2713 | options = qdict_new(); |
2714 | detect_zeroes = blk_get_detect_zeroes_from_root_state(blk); |
2715 | qdict_put_str(options, "detect-zeroes" , detect_zeroes ? "on" : "off" ); |
2716 | |
2717 | if (has_format) { |
2718 | qdict_put_str(options, "driver" , format); |
2719 | } |
2720 | |
2721 | medium_bs = bdrv_open(filename, NULL, options, bdrv_flags, errp); |
2722 | if (!medium_bs) { |
2723 | goto fail; |
2724 | } |
2725 | |
2726 | rc = do_open_tray(has_device ? device : NULL, |
2727 | has_id ? id : NULL, |
2728 | false, &err); |
2729 | if (rc && rc != -ENOSYS) { |
2730 | error_propagate(errp, err); |
2731 | goto fail; |
2732 | } |
2733 | error_free(err); |
2734 | err = NULL; |
2735 | |
2736 | blockdev_remove_medium(has_device, device, has_id, id, &err); |
2737 | if (err) { |
2738 | error_propagate(errp, err); |
2739 | goto fail; |
2740 | } |
2741 | |
2742 | qmp_blockdev_insert_anon_medium(blk, medium_bs, &err); |
2743 | if (err) { |
2744 | error_propagate(errp, err); |
2745 | goto fail; |
2746 | } |
2747 | |
2748 | qmp_blockdev_close_tray(has_device, device, has_id, id, errp); |
2749 | |
2750 | fail: |
2751 | /* If the medium has been inserted, the device has its own reference, so |
2752 | * ours must be relinquished; and if it has not been inserted successfully, |
2753 | * the reference must be relinquished anyway */ |
2754 | bdrv_unref(medium_bs); |
2755 | } |
2756 | |
2757 | /* throttling disk I/O limits */ |
2758 | void qmp_block_set_io_throttle(BlockIOThrottle *arg, Error **errp) |
2759 | { |
2760 | ThrottleConfig cfg; |
2761 | BlockDriverState *bs; |
2762 | BlockBackend *blk; |
2763 | AioContext *aio_context; |
2764 | |
2765 | blk = qmp_get_blk(arg->has_device ? arg->device : NULL, |
2766 | arg->has_id ? arg->id : NULL, |
2767 | errp); |
2768 | if (!blk) { |
2769 | return; |
2770 | } |
2771 | |
2772 | aio_context = blk_get_aio_context(blk); |
2773 | aio_context_acquire(aio_context); |
2774 | |
2775 | bs = blk_bs(blk); |
2776 | if (!bs) { |
2777 | error_setg(errp, "Device has no medium" ); |
2778 | goto out; |
2779 | } |
2780 | |
2781 | throttle_config_init(&cfg); |
2782 | cfg.buckets[THROTTLE_BPS_TOTAL].avg = arg->bps; |
2783 | cfg.buckets[THROTTLE_BPS_READ].avg = arg->bps_rd; |
2784 | cfg.buckets[THROTTLE_BPS_WRITE].avg = arg->bps_wr; |
2785 | |
2786 | cfg.buckets[THROTTLE_OPS_TOTAL].avg = arg->iops; |
2787 | cfg.buckets[THROTTLE_OPS_READ].avg = arg->iops_rd; |
2788 | cfg.buckets[THROTTLE_OPS_WRITE].avg = arg->iops_wr; |
2789 | |
2790 | if (arg->has_bps_max) { |
2791 | cfg.buckets[THROTTLE_BPS_TOTAL].max = arg->bps_max; |
2792 | } |
2793 | if (arg->has_bps_rd_max) { |
2794 | cfg.buckets[THROTTLE_BPS_READ].max = arg->bps_rd_max; |
2795 | } |
2796 | if (arg->has_bps_wr_max) { |
2797 | cfg.buckets[THROTTLE_BPS_WRITE].max = arg->bps_wr_max; |
2798 | } |
2799 | if (arg->has_iops_max) { |
2800 | cfg.buckets[THROTTLE_OPS_TOTAL].max = arg->iops_max; |
2801 | } |
2802 | if (arg->has_iops_rd_max) { |
2803 | cfg.buckets[THROTTLE_OPS_READ].max = arg->iops_rd_max; |
2804 | } |
2805 | if (arg->has_iops_wr_max) { |
2806 | cfg.buckets[THROTTLE_OPS_WRITE].max = arg->iops_wr_max; |
2807 | } |
2808 | |
2809 | if (arg->has_bps_max_length) { |
2810 | cfg.buckets[THROTTLE_BPS_TOTAL].burst_length = arg->bps_max_length; |
2811 | } |
2812 | if (arg->has_bps_rd_max_length) { |
2813 | cfg.buckets[THROTTLE_BPS_READ].burst_length = arg->bps_rd_max_length; |
2814 | } |
2815 | if (arg->has_bps_wr_max_length) { |
2816 | cfg.buckets[THROTTLE_BPS_WRITE].burst_length = arg->bps_wr_max_length; |
2817 | } |
2818 | if (arg->has_iops_max_length) { |
2819 | cfg.buckets[THROTTLE_OPS_TOTAL].burst_length = arg->iops_max_length; |
2820 | } |
2821 | if (arg->has_iops_rd_max_length) { |
2822 | cfg.buckets[THROTTLE_OPS_READ].burst_length = arg->iops_rd_max_length; |
2823 | } |
2824 | if (arg->has_iops_wr_max_length) { |
2825 | cfg.buckets[THROTTLE_OPS_WRITE].burst_length = arg->iops_wr_max_length; |
2826 | } |
2827 | |
2828 | if (arg->has_iops_size) { |
2829 | cfg.op_size = arg->iops_size; |
2830 | } |
2831 | |
2832 | if (!throttle_is_valid(&cfg, errp)) { |
2833 | goto out; |
2834 | } |
2835 | |
2836 | if (throttle_enabled(&cfg)) { |
2837 | /* Enable I/O limits if they're not enabled yet, otherwise |
2838 | * just update the throttling group. */ |
2839 | if (!blk_get_public(blk)->throttle_group_member.throttle_state) { |
2840 | blk_io_limits_enable(blk, |
2841 | arg->has_group ? arg->group : |
2842 | arg->has_device ? arg->device : |
2843 | arg->id); |
2844 | } else if (arg->has_group) { |
2845 | blk_io_limits_update_group(blk, arg->group); |
2846 | } |
2847 | /* Set the new throttling configuration */ |
2848 | blk_set_io_limits(blk, &cfg); |
2849 | } else if (blk_get_public(blk)->throttle_group_member.throttle_state) { |
2850 | /* If all throttling settings are set to 0, disable I/O limits */ |
2851 | blk_io_limits_disable(blk); |
2852 | } |
2853 | |
2854 | out: |
2855 | aio_context_release(aio_context); |
2856 | } |
2857 | |
2858 | void qmp_block_dirty_bitmap_add(const char *node, const char *name, |
2859 | bool has_granularity, uint32_t granularity, |
2860 | bool has_persistent, bool persistent, |
2861 | bool has_autoload, bool autoload, |
2862 | bool has_disabled, bool disabled, |
2863 | Error **errp) |
2864 | { |
2865 | BlockDriverState *bs; |
2866 | BdrvDirtyBitmap *bitmap; |
2867 | |
2868 | if (!name || name[0] == '\0') { |
2869 | error_setg(errp, "Bitmap name cannot be empty" ); |
2870 | return; |
2871 | } |
2872 | |
2873 | bs = bdrv_lookup_bs(node, node, errp); |
2874 | if (!bs) { |
2875 | return; |
2876 | } |
2877 | |
2878 | if (has_granularity) { |
2879 | if (granularity < 512 || !is_power_of_2(granularity)) { |
2880 | error_setg(errp, "Granularity must be power of 2 " |
2881 | "and at least 512" ); |
2882 | return; |
2883 | } |
2884 | } else { |
2885 | /* Default to cluster size, if available: */ |
2886 | granularity = bdrv_get_default_bitmap_granularity(bs); |
2887 | } |
2888 | |
2889 | if (!has_persistent) { |
2890 | persistent = false; |
2891 | } |
2892 | |
2893 | if (has_autoload) { |
2894 | warn_report("Autoload option is deprecated and its value is ignored" ); |
2895 | } |
2896 | |
2897 | if (!has_disabled) { |
2898 | disabled = false; |
2899 | } |
2900 | |
2901 | if (persistent) { |
2902 | AioContext *aio_context = bdrv_get_aio_context(bs); |
2903 | bool ok; |
2904 | |
2905 | aio_context_acquire(aio_context); |
2906 | ok = bdrv_can_store_new_dirty_bitmap(bs, name, granularity, errp); |
2907 | aio_context_release(aio_context); |
2908 | if (!ok) { |
2909 | return; |
2910 | } |
2911 | } |
2912 | |
2913 | bitmap = bdrv_create_dirty_bitmap(bs, granularity, name, errp); |
2914 | if (bitmap == NULL) { |
2915 | return; |
2916 | } |
2917 | |
2918 | if (disabled) { |
2919 | bdrv_disable_dirty_bitmap(bitmap); |
2920 | } |
2921 | |
2922 | bdrv_dirty_bitmap_set_persistence(bitmap, persistent); |
2923 | } |
2924 | |
2925 | static BdrvDirtyBitmap *do_block_dirty_bitmap_remove( |
2926 | const char *node, const char *name, bool release, |
2927 | BlockDriverState **bitmap_bs, Error **errp) |
2928 | { |
2929 | BlockDriverState *bs; |
2930 | BdrvDirtyBitmap *bitmap; |
2931 | |
2932 | bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp); |
2933 | if (!bitmap || !bs) { |
2934 | return NULL; |
2935 | } |
2936 | |
2937 | if (bdrv_dirty_bitmap_check(bitmap, BDRV_BITMAP_BUSY | BDRV_BITMAP_RO, |
2938 | errp)) { |
2939 | return NULL; |
2940 | } |
2941 | |
2942 | if (bdrv_dirty_bitmap_get_persistence(bitmap)) { |
2943 | AioContext *aio_context = bdrv_get_aio_context(bs); |
2944 | Error *local_err = NULL; |
2945 | |
2946 | aio_context_acquire(aio_context); |
2947 | bdrv_remove_persistent_dirty_bitmap(bs, name, &local_err); |
2948 | aio_context_release(aio_context); |
2949 | |
2950 | if (local_err != NULL) { |
2951 | error_propagate(errp, local_err); |
2952 | return NULL; |
2953 | } |
2954 | } |
2955 | |
2956 | if (release) { |
2957 | bdrv_release_dirty_bitmap(bs, bitmap); |
2958 | } |
2959 | |
2960 | if (bitmap_bs) { |
2961 | *bitmap_bs = bs; |
2962 | } |
2963 | |
2964 | return release ? NULL : bitmap; |
2965 | } |
2966 | |
2967 | void qmp_block_dirty_bitmap_remove(const char *node, const char *name, |
2968 | Error **errp) |
2969 | { |
2970 | do_block_dirty_bitmap_remove(node, name, true, NULL, errp); |
2971 | } |
2972 | |
2973 | /** |
2974 | * Completely clear a bitmap, for the purposes of synchronizing a bitmap |
2975 | * immediately after a full backup operation. |
2976 | */ |
2977 | void qmp_block_dirty_bitmap_clear(const char *node, const char *name, |
2978 | Error **errp) |
2979 | { |
2980 | BdrvDirtyBitmap *bitmap; |
2981 | BlockDriverState *bs; |
2982 | |
2983 | bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp); |
2984 | if (!bitmap || !bs) { |
2985 | return; |
2986 | } |
2987 | |
2988 | if (bdrv_dirty_bitmap_check(bitmap, BDRV_BITMAP_DEFAULT, errp)) { |
2989 | return; |
2990 | } |
2991 | |
2992 | bdrv_clear_dirty_bitmap(bitmap, NULL); |
2993 | } |
2994 | |
2995 | void qmp_block_dirty_bitmap_enable(const char *node, const char *name, |
2996 | Error **errp) |
2997 | { |
2998 | BlockDriverState *bs; |
2999 | BdrvDirtyBitmap *bitmap; |
3000 | |
3001 | bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp); |
3002 | if (!bitmap) { |
3003 | return; |
3004 | } |
3005 | |
3006 | if (bdrv_dirty_bitmap_check(bitmap, BDRV_BITMAP_ALLOW_RO, errp)) { |
3007 | return; |
3008 | } |
3009 | |
3010 | bdrv_enable_dirty_bitmap(bitmap); |
3011 | } |
3012 | |
3013 | void qmp_block_dirty_bitmap_disable(const char *node, const char *name, |
3014 | Error **errp) |
3015 | { |
3016 | BlockDriverState *bs; |
3017 | BdrvDirtyBitmap *bitmap; |
3018 | |
3019 | bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp); |
3020 | if (!bitmap) { |
3021 | return; |
3022 | } |
3023 | |
3024 | if (bdrv_dirty_bitmap_check(bitmap, BDRV_BITMAP_ALLOW_RO, errp)) { |
3025 | return; |
3026 | } |
3027 | |
3028 | bdrv_disable_dirty_bitmap(bitmap); |
3029 | } |
3030 | |
3031 | static BdrvDirtyBitmap *do_block_dirty_bitmap_merge( |
3032 | const char *node, const char *target, |
3033 | BlockDirtyBitmapMergeSourceList *bitmaps, |
3034 | HBitmap **backup, Error **errp) |
3035 | { |
3036 | BlockDriverState *bs; |
3037 | BdrvDirtyBitmap *dst, *src, *anon; |
3038 | BlockDirtyBitmapMergeSourceList *lst; |
3039 | Error *local_err = NULL; |
3040 | |
3041 | dst = block_dirty_bitmap_lookup(node, target, &bs, errp); |
3042 | if (!dst) { |
3043 | return NULL; |
3044 | } |
3045 | |
3046 | anon = bdrv_create_dirty_bitmap(bs, bdrv_dirty_bitmap_granularity(dst), |
3047 | NULL, errp); |
3048 | if (!anon) { |
3049 | return NULL; |
3050 | } |
3051 | |
3052 | for (lst = bitmaps; lst; lst = lst->next) { |
3053 | switch (lst->value->type) { |
3054 | const char *name, *node; |
3055 | case QTYPE_QSTRING: |
3056 | name = lst->value->u.local; |
3057 | src = bdrv_find_dirty_bitmap(bs, name); |
3058 | if (!src) { |
3059 | error_setg(errp, "Dirty bitmap '%s' not found" , name); |
3060 | dst = NULL; |
3061 | goto out; |
3062 | } |
3063 | break; |
3064 | case QTYPE_QDICT: |
3065 | node = lst->value->u.external.node; |
3066 | name = lst->value->u.external.name; |
3067 | src = block_dirty_bitmap_lookup(node, name, NULL, errp); |
3068 | if (!src) { |
3069 | dst = NULL; |
3070 | goto out; |
3071 | } |
3072 | break; |
3073 | default: |
3074 | abort(); |
3075 | } |
3076 | |
3077 | bdrv_merge_dirty_bitmap(anon, src, NULL, &local_err); |
3078 | if (local_err) { |
3079 | error_propagate(errp, local_err); |
3080 | dst = NULL; |
3081 | goto out; |
3082 | } |
3083 | } |
3084 | |
3085 | /* Merge into dst; dst is unchanged on failure. */ |
3086 | bdrv_merge_dirty_bitmap(dst, anon, backup, errp); |
3087 | |
3088 | out: |
3089 | bdrv_release_dirty_bitmap(bs, anon); |
3090 | return dst; |
3091 | } |
3092 | |
3093 | void qmp_block_dirty_bitmap_merge(const char *node, const char *target, |
3094 | BlockDirtyBitmapMergeSourceList *bitmaps, |
3095 | Error **errp) |
3096 | { |
3097 | do_block_dirty_bitmap_merge(node, target, bitmaps, NULL, errp); |
3098 | } |
3099 | |
3100 | BlockDirtyBitmapSha256 *qmp_x_debug_block_dirty_bitmap_sha256(const char *node, |
3101 | const char *name, |
3102 | Error **errp) |
3103 | { |
3104 | BdrvDirtyBitmap *bitmap; |
3105 | BlockDriverState *bs; |
3106 | BlockDirtyBitmapSha256 *ret = NULL; |
3107 | char *sha256; |
3108 | |
3109 | bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp); |
3110 | if (!bitmap || !bs) { |
3111 | return NULL; |
3112 | } |
3113 | |
3114 | sha256 = bdrv_dirty_bitmap_sha256(bitmap, errp); |
3115 | if (sha256 == NULL) { |
3116 | return NULL; |
3117 | } |
3118 | |
3119 | ret = g_new(BlockDirtyBitmapSha256, 1); |
3120 | ret->sha256 = sha256; |
3121 | |
3122 | return ret; |
3123 | } |
3124 | |
3125 | void hmp_drive_del(Monitor *mon, const QDict *qdict) |
3126 | { |
3127 | const char *id = qdict_get_str(qdict, "id" ); |
3128 | BlockBackend *blk; |
3129 | BlockDriverState *bs; |
3130 | AioContext *aio_context; |
3131 | Error *local_err = NULL; |
3132 | |
3133 | bs = bdrv_find_node(id); |
3134 | if (bs) { |
3135 | qmp_blockdev_del(id, &local_err); |
3136 | if (local_err) { |
3137 | error_report_err(local_err); |
3138 | } |
3139 | return; |
3140 | } |
3141 | |
3142 | blk = blk_by_name(id); |
3143 | if (!blk) { |
3144 | error_report("Device '%s' not found" , id); |
3145 | return; |
3146 | } |
3147 | |
3148 | if (!blk_legacy_dinfo(blk)) { |
3149 | error_report("Deleting device added with blockdev-add" |
3150 | " is not supported" ); |
3151 | return; |
3152 | } |
3153 | |
3154 | aio_context = blk_get_aio_context(blk); |
3155 | aio_context_acquire(aio_context); |
3156 | |
3157 | bs = blk_bs(blk); |
3158 | if (bs) { |
3159 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) { |
3160 | error_report_err(local_err); |
3161 | aio_context_release(aio_context); |
3162 | return; |
3163 | } |
3164 | |
3165 | blk_remove_bs(blk); |
3166 | } |
3167 | |
3168 | /* Make the BlockBackend and the attached BlockDriverState anonymous */ |
3169 | monitor_remove_blk(blk); |
3170 | |
3171 | /* If this BlockBackend has a device attached to it, its refcount will be |
3172 | * decremented when the device is removed; otherwise we have to do so here. |
3173 | */ |
3174 | if (blk_get_attached_dev(blk)) { |
3175 | /* Further I/O must not pause the guest */ |
3176 | blk_set_on_error(blk, BLOCKDEV_ON_ERROR_REPORT, |
3177 | BLOCKDEV_ON_ERROR_REPORT); |
3178 | } else { |
3179 | blk_unref(blk); |
3180 | } |
3181 | |
3182 | aio_context_release(aio_context); |
3183 | } |
3184 | |
3185 | void qmp_block_resize(bool has_device, const char *device, |
3186 | bool has_node_name, const char *node_name, |
3187 | int64_t size, Error **errp) |
3188 | { |
3189 | Error *local_err = NULL; |
3190 | BlockBackend *blk = NULL; |
3191 | BlockDriverState *bs; |
3192 | AioContext *aio_context; |
3193 | int ret; |
3194 | |
3195 | bs = bdrv_lookup_bs(has_device ? device : NULL, |
3196 | has_node_name ? node_name : NULL, |
3197 | &local_err); |
3198 | if (local_err) { |
3199 | error_propagate(errp, local_err); |
3200 | return; |
3201 | } |
3202 | |
3203 | aio_context = bdrv_get_aio_context(bs); |
3204 | aio_context_acquire(aio_context); |
3205 | |
3206 | if (!bdrv_is_first_non_filter(bs)) { |
3207 | error_setg(errp, QERR_FEATURE_DISABLED, "resize" ); |
3208 | goto out; |
3209 | } |
3210 | |
3211 | if (size < 0) { |
3212 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "size" , "a >0 size" ); |
3213 | goto out; |
3214 | } |
3215 | |
3216 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) { |
3217 | error_setg(errp, QERR_DEVICE_IN_USE, device); |
3218 | goto out; |
3219 | } |
3220 | |
3221 | blk = blk_new(bdrv_get_aio_context(bs), BLK_PERM_RESIZE, BLK_PERM_ALL); |
3222 | ret = blk_insert_bs(blk, bs, errp); |
3223 | if (ret < 0) { |
3224 | goto out; |
3225 | } |
3226 | |
3227 | bdrv_drained_begin(bs); |
3228 | ret = blk_truncate(blk, size, PREALLOC_MODE_OFF, errp); |
3229 | bdrv_drained_end(bs); |
3230 | |
3231 | out: |
3232 | blk_unref(blk); |
3233 | aio_context_release(aio_context); |
3234 | } |
3235 | |
3236 | void qmp_block_stream(bool has_job_id, const char *job_id, const char *device, |
3237 | bool has_base, const char *base, |
3238 | bool has_base_node, const char *base_node, |
3239 | bool has_backing_file, const char *backing_file, |
3240 | bool has_speed, int64_t speed, |
3241 | bool has_on_error, BlockdevOnError on_error, |
3242 | bool has_auto_finalize, bool auto_finalize, |
3243 | bool has_auto_dismiss, bool auto_dismiss, |
3244 | Error **errp) |
3245 | { |
3246 | BlockDriverState *bs, *iter; |
3247 | BlockDriverState *base_bs = NULL; |
3248 | AioContext *aio_context; |
3249 | Error *local_err = NULL; |
3250 | const char *base_name = NULL; |
3251 | int job_flags = JOB_DEFAULT; |
3252 | |
3253 | if (!has_on_error) { |
3254 | on_error = BLOCKDEV_ON_ERROR_REPORT; |
3255 | } |
3256 | |
3257 | bs = bdrv_lookup_bs(device, device, errp); |
3258 | if (!bs) { |
3259 | return; |
3260 | } |
3261 | |
3262 | aio_context = bdrv_get_aio_context(bs); |
3263 | aio_context_acquire(aio_context); |
3264 | |
3265 | if (has_base && has_base_node) { |
3266 | error_setg(errp, "'base' and 'base-node' cannot be specified " |
3267 | "at the same time" ); |
3268 | goto out; |
3269 | } |
3270 | |
3271 | if (has_base) { |
3272 | base_bs = bdrv_find_backing_image(bs, base); |
3273 | if (base_bs == NULL) { |
3274 | error_setg(errp, QERR_BASE_NOT_FOUND, base); |
3275 | goto out; |
3276 | } |
3277 | assert(bdrv_get_aio_context(base_bs) == aio_context); |
3278 | base_name = base; |
3279 | } |
3280 | |
3281 | if (has_base_node) { |
3282 | base_bs = bdrv_lookup_bs(NULL, base_node, errp); |
3283 | if (!base_bs) { |
3284 | goto out; |
3285 | } |
3286 | if (bs == base_bs || !bdrv_chain_contains(bs, base_bs)) { |
3287 | error_setg(errp, "Node '%s' is not a backing image of '%s'" , |
3288 | base_node, device); |
3289 | goto out; |
3290 | } |
3291 | assert(bdrv_get_aio_context(base_bs) == aio_context); |
3292 | bdrv_refresh_filename(base_bs); |
3293 | base_name = base_bs->filename; |
3294 | } |
3295 | |
3296 | /* Check for op blockers in the whole chain between bs and base */ |
3297 | for (iter = bs; iter && iter != base_bs; iter = backing_bs(iter)) { |
3298 | if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_STREAM, errp)) { |
3299 | goto out; |
3300 | } |
3301 | } |
3302 | |
3303 | /* if we are streaming the entire chain, the result will have no backing |
3304 | * file, and specifying one is therefore an error */ |
3305 | if (base_bs == NULL && has_backing_file) { |
3306 | error_setg(errp, "backing file specified, but streaming the " |
3307 | "entire chain" ); |
3308 | goto out; |
3309 | } |
3310 | |
3311 | /* backing_file string overrides base bs filename */ |
3312 | base_name = has_backing_file ? backing_file : base_name; |
3313 | |
3314 | if (has_auto_finalize && !auto_finalize) { |
3315 | job_flags |= JOB_MANUAL_FINALIZE; |
3316 | } |
3317 | if (has_auto_dismiss && !auto_dismiss) { |
3318 | job_flags |= JOB_MANUAL_DISMISS; |
3319 | } |
3320 | |
3321 | stream_start(has_job_id ? job_id : NULL, bs, base_bs, base_name, |
3322 | job_flags, has_speed ? speed : 0, on_error, &local_err); |
3323 | if (local_err) { |
3324 | error_propagate(errp, local_err); |
3325 | goto out; |
3326 | } |
3327 | |
3328 | trace_qmp_block_stream(bs); |
3329 | |
3330 | out: |
3331 | aio_context_release(aio_context); |
3332 | } |
3333 | |
3334 | void qmp_block_commit(bool has_job_id, const char *job_id, const char *device, |
3335 | bool has_base_node, const char *base_node, |
3336 | bool has_base, const char *base, |
3337 | bool has_top_node, const char *top_node, |
3338 | bool has_top, const char *top, |
3339 | bool has_backing_file, const char *backing_file, |
3340 | bool has_speed, int64_t speed, |
3341 | bool has_filter_node_name, const char *filter_node_name, |
3342 | bool has_auto_finalize, bool auto_finalize, |
3343 | bool has_auto_dismiss, bool auto_dismiss, |
3344 | Error **errp) |
3345 | { |
3346 | BlockDriverState *bs; |
3347 | BlockDriverState *iter; |
3348 | BlockDriverState *base_bs, *top_bs; |
3349 | AioContext *aio_context; |
3350 | Error *local_err = NULL; |
3351 | /* This will be part of the QMP command, if/when the |
3352 | * BlockdevOnError change for blkmirror makes it in |
3353 | */ |
3354 | BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT; |
3355 | int job_flags = JOB_DEFAULT; |
3356 | |
3357 | if (!has_speed) { |
3358 | speed = 0; |
3359 | } |
3360 | if (!has_filter_node_name) { |
3361 | filter_node_name = NULL; |
3362 | } |
3363 | if (has_auto_finalize && !auto_finalize) { |
3364 | job_flags |= JOB_MANUAL_FINALIZE; |
3365 | } |
3366 | if (has_auto_dismiss && !auto_dismiss) { |
3367 | job_flags |= JOB_MANUAL_DISMISS; |
3368 | } |
3369 | |
3370 | /* Important Note: |
3371 | * libvirt relies on the DeviceNotFound error class in order to probe for |
3372 | * live commit feature versions; for this to work, we must make sure to |
3373 | * perform the device lookup before any generic errors that may occur in a |
3374 | * scenario in which all optional arguments are omitted. */ |
3375 | bs = qmp_get_root_bs(device, &local_err); |
3376 | if (!bs) { |
3377 | bs = bdrv_lookup_bs(device, device, NULL); |
3378 | if (!bs) { |
3379 | error_free(local_err); |
3380 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, |
3381 | "Device '%s' not found" , device); |
3382 | } else { |
3383 | error_propagate(errp, local_err); |
3384 | } |
3385 | return; |
3386 | } |
3387 | |
3388 | aio_context = bdrv_get_aio_context(bs); |
3389 | aio_context_acquire(aio_context); |
3390 | |
3391 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, errp)) { |
3392 | goto out; |
3393 | } |
3394 | |
3395 | /* default top_bs is the active layer */ |
3396 | top_bs = bs; |
3397 | |
3398 | if (has_top_node && has_top) { |
3399 | error_setg(errp, "'top-node' and 'top' are mutually exclusive" ); |
3400 | goto out; |
3401 | } else if (has_top_node) { |
3402 | top_bs = bdrv_lookup_bs(NULL, top_node, errp); |
3403 | if (top_bs == NULL) { |
3404 | goto out; |
3405 | } |
3406 | if (!bdrv_chain_contains(bs, top_bs)) { |
3407 | error_setg(errp, "'%s' is not in this backing file chain" , |
3408 | top_node); |
3409 | goto out; |
3410 | } |
3411 | } else if (has_top && top) { |
3412 | /* This strcmp() is just a shortcut, there is no need to |
3413 | * refresh @bs's filename. If it mismatches, |
3414 | * bdrv_find_backing_image() will do the refresh and may still |
3415 | * return @bs. */ |
3416 | if (strcmp(bs->filename, top) != 0) { |
3417 | top_bs = bdrv_find_backing_image(bs, top); |
3418 | } |
3419 | } |
3420 | |
3421 | if (top_bs == NULL) { |
3422 | error_setg(errp, "Top image file %s not found" , top ? top : "NULL" ); |
3423 | goto out; |
3424 | } |
3425 | |
3426 | assert(bdrv_get_aio_context(top_bs) == aio_context); |
3427 | |
3428 | if (has_base_node && has_base) { |
3429 | error_setg(errp, "'base-node' and 'base' are mutually exclusive" ); |
3430 | goto out; |
3431 | } else if (has_base_node) { |
3432 | base_bs = bdrv_lookup_bs(NULL, base_node, errp); |
3433 | if (base_bs == NULL) { |
3434 | goto out; |
3435 | } |
3436 | if (!bdrv_chain_contains(top_bs, base_bs)) { |
3437 | error_setg(errp, "'%s' is not in this backing file chain" , |
3438 | base_node); |
3439 | goto out; |
3440 | } |
3441 | } else if (has_base && base) { |
3442 | base_bs = bdrv_find_backing_image(top_bs, base); |
3443 | } else { |
3444 | base_bs = bdrv_find_base(top_bs); |
3445 | } |
3446 | |
3447 | if (base_bs == NULL) { |
3448 | error_setg(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL" ); |
3449 | goto out; |
3450 | } |
3451 | |
3452 | assert(bdrv_get_aio_context(base_bs) == aio_context); |
3453 | |
3454 | for (iter = top_bs; iter != backing_bs(base_bs); iter = backing_bs(iter)) { |
3455 | if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) { |
3456 | goto out; |
3457 | } |
3458 | } |
3459 | |
3460 | /* Do not allow attempts to commit an image into itself */ |
3461 | if (top_bs == base_bs) { |
3462 | error_setg(errp, "cannot commit an image into itself" ); |
3463 | goto out; |
3464 | } |
3465 | |
3466 | if (top_bs == bs) { |
3467 | if (has_backing_file) { |
3468 | error_setg(errp, "'backing-file' specified," |
3469 | " but 'top' is the active layer" ); |
3470 | goto out; |
3471 | } |
3472 | commit_active_start(has_job_id ? job_id : NULL, bs, base_bs, |
3473 | job_flags, speed, on_error, |
3474 | filter_node_name, NULL, NULL, false, &local_err); |
3475 | } else { |
3476 | BlockDriverState *overlay_bs = bdrv_find_overlay(bs, top_bs); |
3477 | if (bdrv_op_is_blocked(overlay_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) { |
3478 | goto out; |
3479 | } |
3480 | commit_start(has_job_id ? job_id : NULL, bs, base_bs, top_bs, job_flags, |
3481 | speed, on_error, has_backing_file ? backing_file : NULL, |
3482 | filter_node_name, &local_err); |
3483 | } |
3484 | if (local_err != NULL) { |
3485 | error_propagate(errp, local_err); |
3486 | goto out; |
3487 | } |
3488 | |
3489 | out: |
3490 | aio_context_release(aio_context); |
3491 | } |
3492 | |
3493 | /* Common QMP interface for drive-backup and blockdev-backup */ |
3494 | static BlockJob *do_backup_common(BackupCommon *backup, |
3495 | BlockDriverState *bs, |
3496 | BlockDriverState *target_bs, |
3497 | AioContext *aio_context, |
3498 | JobTxn *txn, Error **errp) |
3499 | { |
3500 | BlockJob *job = NULL; |
3501 | BdrvDirtyBitmap *bmap = NULL; |
3502 | int job_flags = JOB_DEFAULT; |
3503 | int ret; |
3504 | |
3505 | if (!backup->has_speed) { |
3506 | backup->speed = 0; |
3507 | } |
3508 | if (!backup->has_on_source_error) { |
3509 | backup->on_source_error = BLOCKDEV_ON_ERROR_REPORT; |
3510 | } |
3511 | if (!backup->has_on_target_error) { |
3512 | backup->on_target_error = BLOCKDEV_ON_ERROR_REPORT; |
3513 | } |
3514 | if (!backup->has_job_id) { |
3515 | backup->job_id = NULL; |
3516 | } |
3517 | if (!backup->has_auto_finalize) { |
3518 | backup->auto_finalize = true; |
3519 | } |
3520 | if (!backup->has_auto_dismiss) { |
3521 | backup->auto_dismiss = true; |
3522 | } |
3523 | if (!backup->has_compress) { |
3524 | backup->compress = false; |
3525 | } |
3526 | |
3527 | ret = bdrv_try_set_aio_context(target_bs, aio_context, errp); |
3528 | if (ret < 0) { |
3529 | return NULL; |
3530 | } |
3531 | |
3532 | if ((backup->sync == MIRROR_SYNC_MODE_BITMAP) || |
3533 | (backup->sync == MIRROR_SYNC_MODE_INCREMENTAL)) { |
3534 | /* done before desugaring 'incremental' to print the right message */ |
3535 | if (!backup->has_bitmap) { |
3536 | error_setg(errp, "must provide a valid bitmap name for " |
3537 | "'%s' sync mode" , MirrorSyncMode_str(backup->sync)); |
3538 | return NULL; |
3539 | } |
3540 | } |
3541 | |
3542 | if (backup->sync == MIRROR_SYNC_MODE_INCREMENTAL) { |
3543 | if (backup->has_bitmap_mode && |
3544 | backup->bitmap_mode != BITMAP_SYNC_MODE_ON_SUCCESS) { |
3545 | error_setg(errp, "Bitmap sync mode must be '%s' " |
3546 | "when using sync mode '%s'" , |
3547 | BitmapSyncMode_str(BITMAP_SYNC_MODE_ON_SUCCESS), |
3548 | MirrorSyncMode_str(backup->sync)); |
3549 | return NULL; |
3550 | } |
3551 | backup->has_bitmap_mode = true; |
3552 | backup->sync = MIRROR_SYNC_MODE_BITMAP; |
3553 | backup->bitmap_mode = BITMAP_SYNC_MODE_ON_SUCCESS; |
3554 | } |
3555 | |
3556 | if (backup->has_bitmap) { |
3557 | bmap = bdrv_find_dirty_bitmap(bs, backup->bitmap); |
3558 | if (!bmap) { |
3559 | error_setg(errp, "Bitmap '%s' could not be found" , backup->bitmap); |
3560 | return NULL; |
3561 | } |
3562 | if (!backup->has_bitmap_mode) { |
3563 | error_setg(errp, "Bitmap sync mode must be given " |
3564 | "when providing a bitmap" ); |
3565 | return NULL; |
3566 | } |
3567 | if (bdrv_dirty_bitmap_check(bmap, BDRV_BITMAP_ALLOW_RO, errp)) { |
3568 | return NULL; |
3569 | } |
3570 | |
3571 | /* This does not produce a useful bitmap artifact: */ |
3572 | if (backup->sync == MIRROR_SYNC_MODE_NONE) { |
3573 | error_setg(errp, "sync mode '%s' does not produce meaningful bitmap" |
3574 | " outputs" , MirrorSyncMode_str(backup->sync)); |
3575 | return NULL; |
3576 | } |
3577 | |
3578 | /* If the bitmap isn't used for input or output, this is useless: */ |
3579 | if (backup->bitmap_mode == BITMAP_SYNC_MODE_NEVER && |
3580 | backup->sync != MIRROR_SYNC_MODE_BITMAP) { |
3581 | error_setg(errp, "Bitmap sync mode '%s' has no meaningful effect" |
3582 | " when combined with sync mode '%s'" , |
3583 | BitmapSyncMode_str(backup->bitmap_mode), |
3584 | MirrorSyncMode_str(backup->sync)); |
3585 | return NULL; |
3586 | } |
3587 | } |
3588 | |
3589 | if (!backup->has_bitmap && backup->has_bitmap_mode) { |
3590 | error_setg(errp, "Cannot specify bitmap sync mode without a bitmap" ); |
3591 | return NULL; |
3592 | } |
3593 | |
3594 | if (!backup->auto_finalize) { |
3595 | job_flags |= JOB_MANUAL_FINALIZE; |
3596 | } |
3597 | if (!backup->auto_dismiss) { |
3598 | job_flags |= JOB_MANUAL_DISMISS; |
3599 | } |
3600 | |
3601 | job = backup_job_create(backup->job_id, bs, target_bs, backup->speed, |
3602 | backup->sync, bmap, backup->bitmap_mode, |
3603 | backup->compress, |
3604 | backup->on_source_error, |
3605 | backup->on_target_error, |
3606 | job_flags, NULL, NULL, txn, errp); |
3607 | return job; |
3608 | } |
3609 | |
3610 | static BlockJob *do_drive_backup(DriveBackup *backup, JobTxn *txn, |
3611 | Error **errp) |
3612 | { |
3613 | BlockDriverState *bs; |
3614 | BlockDriverState *target_bs; |
3615 | BlockDriverState *source = NULL; |
3616 | BlockJob *job = NULL; |
3617 | AioContext *aio_context; |
3618 | QDict *options; |
3619 | Error *local_err = NULL; |
3620 | int flags; |
3621 | int64_t size; |
3622 | bool set_backing_hd = false; |
3623 | |
3624 | if (!backup->has_mode) { |
3625 | backup->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; |
3626 | } |
3627 | |
3628 | bs = bdrv_lookup_bs(backup->device, backup->device, errp); |
3629 | if (!bs) { |
3630 | return NULL; |
3631 | } |
3632 | |
3633 | if (!bs->drv) { |
3634 | error_setg(errp, "Device has no medium" ); |
3635 | return NULL; |
3636 | } |
3637 | |
3638 | aio_context = bdrv_get_aio_context(bs); |
3639 | aio_context_acquire(aio_context); |
3640 | |
3641 | if (!backup->has_format) { |
3642 | backup->format = backup->mode == NEW_IMAGE_MODE_EXISTING ? |
3643 | NULL : (char*) bs->drv->format_name; |
3644 | } |
3645 | |
3646 | /* Early check to avoid creating target */ |
3647 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) { |
3648 | goto out; |
3649 | } |
3650 | |
3651 | flags = bs->open_flags | BDRV_O_RDWR; |
3652 | |
3653 | /* See if we have a backing HD we can use to create our new image |
3654 | * on top of. */ |
3655 | if (backup->sync == MIRROR_SYNC_MODE_TOP) { |
3656 | source = backing_bs(bs); |
3657 | if (!source) { |
3658 | backup->sync = MIRROR_SYNC_MODE_FULL; |
3659 | } |
3660 | } |
3661 | if (backup->sync == MIRROR_SYNC_MODE_NONE) { |
3662 | source = bs; |
3663 | flags |= BDRV_O_NO_BACKING; |
3664 | set_backing_hd = true; |
3665 | } |
3666 | |
3667 | size = bdrv_getlength(bs); |
3668 | if (size < 0) { |
3669 | error_setg_errno(errp, -size, "bdrv_getlength failed" ); |
3670 | goto out; |
3671 | } |
3672 | |
3673 | if (backup->mode != NEW_IMAGE_MODE_EXISTING) { |
3674 | assert(backup->format); |
3675 | if (source) { |
3676 | bdrv_refresh_filename(source); |
3677 | bdrv_img_create(backup->target, backup->format, source->filename, |
3678 | source->drv->format_name, NULL, |
3679 | size, flags, false, &local_err); |
3680 | } else { |
3681 | bdrv_img_create(backup->target, backup->format, NULL, NULL, NULL, |
3682 | size, flags, false, &local_err); |
3683 | } |
3684 | } |
3685 | |
3686 | if (local_err) { |
3687 | error_propagate(errp, local_err); |
3688 | goto out; |
3689 | } |
3690 | |
3691 | options = qdict_new(); |
3692 | qdict_put_str(options, "discard" , "unmap" ); |
3693 | qdict_put_str(options, "detect-zeroes" , "unmap" ); |
3694 | if (backup->format) { |
3695 | qdict_put_str(options, "driver" , backup->format); |
3696 | } |
3697 | |
3698 | target_bs = bdrv_open(backup->target, NULL, options, flags, errp); |
3699 | if (!target_bs) { |
3700 | goto out; |
3701 | } |
3702 | |
3703 | if (set_backing_hd) { |
3704 | bdrv_set_backing_hd(target_bs, source, &local_err); |
3705 | if (local_err) { |
3706 | goto unref; |
3707 | } |
3708 | } |
3709 | |
3710 | job = do_backup_common(qapi_DriveBackup_base(backup), |
3711 | bs, target_bs, aio_context, txn, errp); |
3712 | |
3713 | unref: |
3714 | bdrv_unref(target_bs); |
3715 | out: |
3716 | aio_context_release(aio_context); |
3717 | return job; |
3718 | } |
3719 | |
3720 | void qmp_drive_backup(DriveBackup *arg, Error **errp) |
3721 | { |
3722 | |
3723 | BlockJob *job; |
3724 | job = do_drive_backup(arg, NULL, errp); |
3725 | if (job) { |
3726 | job_start(&job->job); |
3727 | } |
3728 | } |
3729 | |
3730 | BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp) |
3731 | { |
3732 | return bdrv_named_nodes_list(errp); |
3733 | } |
3734 | |
3735 | XDbgBlockGraph *qmp_x_debug_query_block_graph(Error **errp) |
3736 | { |
3737 | return bdrv_get_xdbg_block_graph(errp); |
3738 | } |
3739 | |
3740 | BlockJob *do_blockdev_backup(BlockdevBackup *backup, JobTxn *txn, |
3741 | Error **errp) |
3742 | { |
3743 | BlockDriverState *bs; |
3744 | BlockDriverState *target_bs; |
3745 | AioContext *aio_context; |
3746 | BlockJob *job; |
3747 | |
3748 | bs = bdrv_lookup_bs(backup->device, backup->device, errp); |
3749 | if (!bs) { |
3750 | return NULL; |
3751 | } |
3752 | |
3753 | target_bs = bdrv_lookup_bs(backup->target, backup->target, errp); |
3754 | if (!target_bs) { |
3755 | return NULL; |
3756 | } |
3757 | |
3758 | aio_context = bdrv_get_aio_context(bs); |
3759 | aio_context_acquire(aio_context); |
3760 | |
3761 | job = do_backup_common(qapi_BlockdevBackup_base(backup), |
3762 | bs, target_bs, aio_context, txn, errp); |
3763 | |
3764 | aio_context_release(aio_context); |
3765 | return job; |
3766 | } |
3767 | |
3768 | void qmp_blockdev_backup(BlockdevBackup *arg, Error **errp) |
3769 | { |
3770 | BlockJob *job; |
3771 | job = do_blockdev_backup(arg, NULL, errp); |
3772 | if (job) { |
3773 | job_start(&job->job); |
3774 | } |
3775 | } |
3776 | |
3777 | /* Parameter check and block job starting for drive mirroring. |
3778 | * Caller should hold @device and @target's aio context (must be the same). |
3779 | **/ |
3780 | static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs, |
3781 | BlockDriverState *target, |
3782 | bool has_replaces, const char *replaces, |
3783 | enum MirrorSyncMode sync, |
3784 | BlockMirrorBackingMode backing_mode, |
3785 | bool zero_target, |
3786 | bool has_speed, int64_t speed, |
3787 | bool has_granularity, uint32_t granularity, |
3788 | bool has_buf_size, int64_t buf_size, |
3789 | bool has_on_source_error, |
3790 | BlockdevOnError on_source_error, |
3791 | bool has_on_target_error, |
3792 | BlockdevOnError on_target_error, |
3793 | bool has_unmap, bool unmap, |
3794 | bool has_filter_node_name, |
3795 | const char *filter_node_name, |
3796 | bool has_copy_mode, MirrorCopyMode copy_mode, |
3797 | bool has_auto_finalize, bool auto_finalize, |
3798 | bool has_auto_dismiss, bool auto_dismiss, |
3799 | Error **errp) |
3800 | { |
3801 | int job_flags = JOB_DEFAULT; |
3802 | |
3803 | if (!has_speed) { |
3804 | speed = 0; |
3805 | } |
3806 | if (!has_on_source_error) { |
3807 | on_source_error = BLOCKDEV_ON_ERROR_REPORT; |
3808 | } |
3809 | if (!has_on_target_error) { |
3810 | on_target_error = BLOCKDEV_ON_ERROR_REPORT; |
3811 | } |
3812 | if (!has_granularity) { |
3813 | granularity = 0; |
3814 | } |
3815 | if (!has_buf_size) { |
3816 | buf_size = 0; |
3817 | } |
3818 | if (!has_unmap) { |
3819 | unmap = true; |
3820 | } |
3821 | if (!has_filter_node_name) { |
3822 | filter_node_name = NULL; |
3823 | } |
3824 | if (!has_copy_mode) { |
3825 | copy_mode = MIRROR_COPY_MODE_BACKGROUND; |
3826 | } |
3827 | if (has_auto_finalize && !auto_finalize) { |
3828 | job_flags |= JOB_MANUAL_FINALIZE; |
3829 | } |
3830 | if (has_auto_dismiss && !auto_dismiss) { |
3831 | job_flags |= JOB_MANUAL_DISMISS; |
3832 | } |
3833 | |
3834 | if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) { |
3835 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity" , |
3836 | "a value in range [512B, 64MB]" ); |
3837 | return; |
3838 | } |
3839 | if (granularity & (granularity - 1)) { |
3840 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity" , |
3841 | "power of 2" ); |
3842 | return; |
3843 | } |
3844 | |
3845 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) { |
3846 | return; |
3847 | } |
3848 | if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_MIRROR_TARGET, errp)) { |
3849 | return; |
3850 | } |
3851 | |
3852 | if (!bs->backing && sync == MIRROR_SYNC_MODE_TOP) { |
3853 | sync = MIRROR_SYNC_MODE_FULL; |
3854 | } |
3855 | |
3856 | if (has_replaces) { |
3857 | BlockDriverState *to_replace_bs; |
3858 | AioContext *replace_aio_context; |
3859 | int64_t bs_size, replace_size; |
3860 | |
3861 | bs_size = bdrv_getlength(bs); |
3862 | if (bs_size < 0) { |
3863 | error_setg_errno(errp, -bs_size, "Failed to query device's size" ); |
3864 | return; |
3865 | } |
3866 | |
3867 | to_replace_bs = check_to_replace_node(bs, replaces, errp); |
3868 | if (!to_replace_bs) { |
3869 | return; |
3870 | } |
3871 | |
3872 | replace_aio_context = bdrv_get_aio_context(to_replace_bs); |
3873 | aio_context_acquire(replace_aio_context); |
3874 | replace_size = bdrv_getlength(to_replace_bs); |
3875 | aio_context_release(replace_aio_context); |
3876 | |
3877 | if (replace_size < 0) { |
3878 | error_setg_errno(errp, -replace_size, |
3879 | "Failed to query the replacement node's size" ); |
3880 | return; |
3881 | } |
3882 | if (bs_size != replace_size) { |
3883 | error_setg(errp, "cannot replace image with a mirror image of " |
3884 | "different size" ); |
3885 | return; |
3886 | } |
3887 | } |
3888 | |
3889 | /* pass the node name to replace to mirror start since it's loose coupling |
3890 | * and will allow to check whether the node still exist at mirror completion |
3891 | */ |
3892 | mirror_start(job_id, bs, target, |
3893 | has_replaces ? replaces : NULL, job_flags, |
3894 | speed, granularity, buf_size, sync, backing_mode, zero_target, |
3895 | on_source_error, on_target_error, unmap, filter_node_name, |
3896 | copy_mode, errp); |
3897 | } |
3898 | |
3899 | void qmp_drive_mirror(DriveMirror *arg, Error **errp) |
3900 | { |
3901 | BlockDriverState *bs; |
3902 | BlockDriverState *source, *target_bs; |
3903 | AioContext *aio_context; |
3904 | BlockMirrorBackingMode backing_mode; |
3905 | Error *local_err = NULL; |
3906 | QDict *options = NULL; |
3907 | int flags; |
3908 | int64_t size; |
3909 | const char *format = arg->format; |
3910 | bool zero_target; |
3911 | int ret; |
3912 | |
3913 | bs = qmp_get_root_bs(arg->device, errp); |
3914 | if (!bs) { |
3915 | return; |
3916 | } |
3917 | |
3918 | /* Early check to avoid creating target */ |
3919 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) { |
3920 | return; |
3921 | } |
3922 | |
3923 | aio_context = bdrv_get_aio_context(bs); |
3924 | aio_context_acquire(aio_context); |
3925 | |
3926 | if (!arg->has_mode) { |
3927 | arg->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; |
3928 | } |
3929 | |
3930 | if (!arg->has_format) { |
3931 | format = (arg->mode == NEW_IMAGE_MODE_EXISTING |
3932 | ? NULL : bs->drv->format_name); |
3933 | } |
3934 | |
3935 | flags = bs->open_flags | BDRV_O_RDWR; |
3936 | source = backing_bs(bs); |
3937 | if (!source && arg->sync == MIRROR_SYNC_MODE_TOP) { |
3938 | arg->sync = MIRROR_SYNC_MODE_FULL; |
3939 | } |
3940 | if (arg->sync == MIRROR_SYNC_MODE_NONE) { |
3941 | source = bs; |
3942 | } |
3943 | |
3944 | size = bdrv_getlength(bs); |
3945 | if (size < 0) { |
3946 | error_setg_errno(errp, -size, "bdrv_getlength failed" ); |
3947 | goto out; |
3948 | } |
3949 | |
3950 | if (arg->has_replaces) { |
3951 | if (!arg->has_node_name) { |
3952 | error_setg(errp, "a node-name must be provided when replacing a" |
3953 | " named node of the graph" ); |
3954 | goto out; |
3955 | } |
3956 | } |
3957 | |
3958 | if (arg->mode == NEW_IMAGE_MODE_ABSOLUTE_PATHS) { |
3959 | backing_mode = MIRROR_SOURCE_BACKING_CHAIN; |
3960 | } else { |
3961 | backing_mode = MIRROR_OPEN_BACKING_CHAIN; |
3962 | } |
3963 | |
3964 | /* Don't open backing image in create() */ |
3965 | flags |= BDRV_O_NO_BACKING; |
3966 | |
3967 | if ((arg->sync == MIRROR_SYNC_MODE_FULL || !source) |
3968 | && arg->mode != NEW_IMAGE_MODE_EXISTING) |
3969 | { |
3970 | /* create new image w/o backing file */ |
3971 | assert(format); |
3972 | bdrv_img_create(arg->target, format, |
3973 | NULL, NULL, NULL, size, flags, false, &local_err); |
3974 | } else { |
3975 | switch (arg->mode) { |
3976 | case NEW_IMAGE_MODE_EXISTING: |
3977 | break; |
3978 | case NEW_IMAGE_MODE_ABSOLUTE_PATHS: |
3979 | /* create new image with backing file */ |
3980 | bdrv_refresh_filename(source); |
3981 | bdrv_img_create(arg->target, format, |
3982 | source->filename, |
3983 | source->drv->format_name, |
3984 | NULL, size, flags, false, &local_err); |
3985 | break; |
3986 | default: |
3987 | abort(); |
3988 | } |
3989 | } |
3990 | |
3991 | if (local_err) { |
3992 | error_propagate(errp, local_err); |
3993 | goto out; |
3994 | } |
3995 | |
3996 | options = qdict_new(); |
3997 | if (arg->has_node_name) { |
3998 | qdict_put_str(options, "node-name" , arg->node_name); |
3999 | } |
4000 | if (format) { |
4001 | qdict_put_str(options, "driver" , format); |
4002 | } |
4003 | |
4004 | /* Mirroring takes care of copy-on-write using the source's backing |
4005 | * file. |
4006 | */ |
4007 | target_bs = bdrv_open(arg->target, NULL, options, flags, errp); |
4008 | if (!target_bs) { |
4009 | goto out; |
4010 | } |
4011 | |
4012 | zero_target = (arg->sync == MIRROR_SYNC_MODE_FULL && |
4013 | (arg->mode == NEW_IMAGE_MODE_EXISTING || |
4014 | !bdrv_has_zero_init(target_bs))); |
4015 | |
4016 | ret = bdrv_try_set_aio_context(target_bs, aio_context, errp); |
4017 | if (ret < 0) { |
4018 | bdrv_unref(target_bs); |
4019 | goto out; |
4020 | } |
4021 | |
4022 | blockdev_mirror_common(arg->has_job_id ? arg->job_id : NULL, bs, target_bs, |
4023 | arg->has_replaces, arg->replaces, arg->sync, |
4024 | backing_mode, zero_target, |
4025 | arg->has_speed, arg->speed, |
4026 | arg->has_granularity, arg->granularity, |
4027 | arg->has_buf_size, arg->buf_size, |
4028 | arg->has_on_source_error, arg->on_source_error, |
4029 | arg->has_on_target_error, arg->on_target_error, |
4030 | arg->has_unmap, arg->unmap, |
4031 | false, NULL, |
4032 | arg->has_copy_mode, arg->copy_mode, |
4033 | arg->has_auto_finalize, arg->auto_finalize, |
4034 | arg->has_auto_dismiss, arg->auto_dismiss, |
4035 | &local_err); |
4036 | bdrv_unref(target_bs); |
4037 | error_propagate(errp, local_err); |
4038 | out: |
4039 | aio_context_release(aio_context); |
4040 | } |
4041 | |
4042 | void qmp_blockdev_mirror(bool has_job_id, const char *job_id, |
4043 | const char *device, const char *target, |
4044 | bool has_replaces, const char *replaces, |
4045 | MirrorSyncMode sync, |
4046 | bool has_speed, int64_t speed, |
4047 | bool has_granularity, uint32_t granularity, |
4048 | bool has_buf_size, int64_t buf_size, |
4049 | bool has_on_source_error, |
4050 | BlockdevOnError on_source_error, |
4051 | bool has_on_target_error, |
4052 | BlockdevOnError on_target_error, |
4053 | bool has_filter_node_name, |
4054 | const char *filter_node_name, |
4055 | bool has_copy_mode, MirrorCopyMode copy_mode, |
4056 | bool has_auto_finalize, bool auto_finalize, |
4057 | bool has_auto_dismiss, bool auto_dismiss, |
4058 | Error **errp) |
4059 | { |
4060 | BlockDriverState *bs; |
4061 | BlockDriverState *target_bs; |
4062 | AioContext *aio_context; |
4063 | BlockMirrorBackingMode backing_mode = MIRROR_LEAVE_BACKING_CHAIN; |
4064 | Error *local_err = NULL; |
4065 | bool zero_target; |
4066 | int ret; |
4067 | |
4068 | bs = qmp_get_root_bs(device, errp); |
4069 | if (!bs) { |
4070 | return; |
4071 | } |
4072 | |
4073 | target_bs = bdrv_lookup_bs(target, target, errp); |
4074 | if (!target_bs) { |
4075 | return; |
4076 | } |
4077 | |
4078 | zero_target = (sync == MIRROR_SYNC_MODE_FULL); |
4079 | |
4080 | aio_context = bdrv_get_aio_context(bs); |
4081 | aio_context_acquire(aio_context); |
4082 | |
4083 | ret = bdrv_try_set_aio_context(target_bs, aio_context, errp); |
4084 | if (ret < 0) { |
4085 | goto out; |
4086 | } |
4087 | |
4088 | blockdev_mirror_common(has_job_id ? job_id : NULL, bs, target_bs, |
4089 | has_replaces, replaces, sync, backing_mode, |
4090 | zero_target, has_speed, speed, |
4091 | has_granularity, granularity, |
4092 | has_buf_size, buf_size, |
4093 | has_on_source_error, on_source_error, |
4094 | has_on_target_error, on_target_error, |
4095 | true, true, |
4096 | has_filter_node_name, filter_node_name, |
4097 | has_copy_mode, copy_mode, |
4098 | has_auto_finalize, auto_finalize, |
4099 | has_auto_dismiss, auto_dismiss, |
4100 | &local_err); |
4101 | error_propagate(errp, local_err); |
4102 | out: |
4103 | aio_context_release(aio_context); |
4104 | } |
4105 | |
4106 | /* Get a block job using its ID and acquire its AioContext */ |
4107 | static BlockJob *find_block_job(const char *id, AioContext **aio_context, |
4108 | Error **errp) |
4109 | { |
4110 | BlockJob *job; |
4111 | |
4112 | assert(id != NULL); |
4113 | |
4114 | *aio_context = NULL; |
4115 | |
4116 | job = block_job_get(id); |
4117 | |
4118 | if (!job) { |
4119 | error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE, |
4120 | "Block job '%s' not found" , id); |
4121 | return NULL; |
4122 | } |
4123 | |
4124 | *aio_context = blk_get_aio_context(job->blk); |
4125 | aio_context_acquire(*aio_context); |
4126 | |
4127 | return job; |
4128 | } |
4129 | |
4130 | void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) |
4131 | { |
4132 | AioContext *aio_context; |
4133 | BlockJob *job = find_block_job(device, &aio_context, errp); |
4134 | |
4135 | if (!job) { |
4136 | return; |
4137 | } |
4138 | |
4139 | block_job_set_speed(job, speed, errp); |
4140 | aio_context_release(aio_context); |
4141 | } |
4142 | |
4143 | void qmp_block_job_cancel(const char *device, |
4144 | bool has_force, bool force, Error **errp) |
4145 | { |
4146 | AioContext *aio_context; |
4147 | BlockJob *job = find_block_job(device, &aio_context, errp); |
4148 | |
4149 | if (!job) { |
4150 | return; |
4151 | } |
4152 | |
4153 | if (!has_force) { |
4154 | force = false; |
4155 | } |
4156 | |
4157 | if (job_user_paused(&job->job) && !force) { |
4158 | error_setg(errp, "The block job for device '%s' is currently paused" , |
4159 | device); |
4160 | goto out; |
4161 | } |
4162 | |
4163 | trace_qmp_block_job_cancel(job); |
4164 | job_user_cancel(&job->job, force, errp); |
4165 | out: |
4166 | aio_context_release(aio_context); |
4167 | } |
4168 | |
4169 | void qmp_block_job_pause(const char *device, Error **errp) |
4170 | { |
4171 | AioContext *aio_context; |
4172 | BlockJob *job = find_block_job(device, &aio_context, errp); |
4173 | |
4174 | if (!job) { |
4175 | return; |
4176 | } |
4177 | |
4178 | trace_qmp_block_job_pause(job); |
4179 | job_user_pause(&job->job, errp); |
4180 | aio_context_release(aio_context); |
4181 | } |
4182 | |
4183 | void qmp_block_job_resume(const char *device, Error **errp) |
4184 | { |
4185 | AioContext *aio_context; |
4186 | BlockJob *job = find_block_job(device, &aio_context, errp); |
4187 | |
4188 | if (!job) { |
4189 | return; |
4190 | } |
4191 | |
4192 | trace_qmp_block_job_resume(job); |
4193 | job_user_resume(&job->job, errp); |
4194 | aio_context_release(aio_context); |
4195 | } |
4196 | |
4197 | void qmp_block_job_complete(const char *device, Error **errp) |
4198 | { |
4199 | AioContext *aio_context; |
4200 | BlockJob *job = find_block_job(device, &aio_context, errp); |
4201 | |
4202 | if (!job) { |
4203 | return; |
4204 | } |
4205 | |
4206 | trace_qmp_block_job_complete(job); |
4207 | job_complete(&job->job, errp); |
4208 | aio_context_release(aio_context); |
4209 | } |
4210 | |
4211 | void qmp_block_job_finalize(const char *id, Error **errp) |
4212 | { |
4213 | AioContext *aio_context; |
4214 | BlockJob *job = find_block_job(id, &aio_context, errp); |
4215 | |
4216 | if (!job) { |
4217 | return; |
4218 | } |
4219 | |
4220 | trace_qmp_block_job_finalize(job); |
4221 | job_finalize(&job->job, errp); |
4222 | aio_context_release(aio_context); |
4223 | } |
4224 | |
4225 | void qmp_block_job_dismiss(const char *id, Error **errp) |
4226 | { |
4227 | AioContext *aio_context; |
4228 | BlockJob *bjob = find_block_job(id, &aio_context, errp); |
4229 | Job *job; |
4230 | |
4231 | if (!bjob) { |
4232 | return; |
4233 | } |
4234 | |
4235 | trace_qmp_block_job_dismiss(bjob); |
4236 | job = &bjob->job; |
4237 | job_dismiss(&job, errp); |
4238 | aio_context_release(aio_context); |
4239 | } |
4240 | |
4241 | void qmp_change_backing_file(const char *device, |
4242 | const char *image_node_name, |
4243 | const char *backing_file, |
4244 | Error **errp) |
4245 | { |
4246 | BlockDriverState *bs = NULL; |
4247 | AioContext *aio_context; |
4248 | BlockDriverState *image_bs = NULL; |
4249 | Error *local_err = NULL; |
4250 | bool ro; |
4251 | int ret; |
4252 | |
4253 | bs = qmp_get_root_bs(device, errp); |
4254 | if (!bs) { |
4255 | return; |
4256 | } |
4257 | |
4258 | aio_context = bdrv_get_aio_context(bs); |
4259 | aio_context_acquire(aio_context); |
4260 | |
4261 | image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err); |
4262 | if (local_err) { |
4263 | error_propagate(errp, local_err); |
4264 | goto out; |
4265 | } |
4266 | |
4267 | if (!image_bs) { |
4268 | error_setg(errp, "image file not found" ); |
4269 | goto out; |
4270 | } |
4271 | |
4272 | if (bdrv_find_base(image_bs) == image_bs) { |
4273 | error_setg(errp, "not allowing backing file change on an image " |
4274 | "without a backing file" ); |
4275 | goto out; |
4276 | } |
4277 | |
4278 | /* even though we are not necessarily operating on bs, we need it to |
4279 | * determine if block ops are currently prohibited on the chain */ |
4280 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) { |
4281 | goto out; |
4282 | } |
4283 | |
4284 | /* final sanity check */ |
4285 | if (!bdrv_chain_contains(bs, image_bs)) { |
4286 | error_setg(errp, "'%s' and image file are not in the same chain" , |
4287 | device); |
4288 | goto out; |
4289 | } |
4290 | |
4291 | /* if not r/w, reopen to make r/w */ |
4292 | ro = bdrv_is_read_only(image_bs); |
4293 | |
4294 | if (ro) { |
4295 | if (bdrv_reopen_set_read_only(image_bs, false, errp) != 0) { |
4296 | goto out; |
4297 | } |
4298 | } |
4299 | |
4300 | ret = bdrv_change_backing_file(image_bs, backing_file, |
4301 | image_bs->drv ? image_bs->drv->format_name : "" ); |
4302 | |
4303 | if (ret < 0) { |
4304 | error_setg_errno(errp, -ret, "Could not change backing file to '%s'" , |
4305 | backing_file); |
4306 | /* don't exit here, so we can try to restore open flags if |
4307 | * appropriate */ |
4308 | } |
4309 | |
4310 | if (ro) { |
4311 | bdrv_reopen_set_read_only(image_bs, true, &local_err); |
4312 | error_propagate(errp, local_err); |
4313 | } |
4314 | |
4315 | out: |
4316 | aio_context_release(aio_context); |
4317 | } |
4318 | |
4319 | void hmp_drive_add_node(Monitor *mon, const char *optstr) |
4320 | { |
4321 | QemuOpts *opts; |
4322 | QDict *qdict; |
4323 | Error *local_err = NULL; |
4324 | |
4325 | opts = qemu_opts_parse_noisily(&qemu_drive_opts, optstr, false); |
4326 | if (!opts) { |
4327 | return; |
4328 | } |
4329 | |
4330 | qdict = qemu_opts_to_qdict(opts, NULL); |
4331 | |
4332 | if (!qdict_get_try_str(qdict, "node-name" )) { |
4333 | qobject_unref(qdict); |
4334 | error_report("'node-name' needs to be specified" ); |
4335 | goto out; |
4336 | } |
4337 | |
4338 | BlockDriverState *bs = bds_tree_init(qdict, &local_err); |
4339 | if (!bs) { |
4340 | error_report_err(local_err); |
4341 | goto out; |
4342 | } |
4343 | |
4344 | QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list); |
4345 | |
4346 | out: |
4347 | qemu_opts_del(opts); |
4348 | } |
4349 | |
4350 | void qmp_blockdev_add(BlockdevOptions *options, Error **errp) |
4351 | { |
4352 | BlockDriverState *bs; |
4353 | QObject *obj; |
4354 | Visitor *v = qobject_output_visitor_new(&obj); |
4355 | QDict *qdict; |
4356 | Error *local_err = NULL; |
4357 | |
4358 | visit_type_BlockdevOptions(v, NULL, &options, &local_err); |
4359 | if (local_err) { |
4360 | error_propagate(errp, local_err); |
4361 | goto fail; |
4362 | } |
4363 | |
4364 | visit_complete(v, &obj); |
4365 | qdict = qobject_to(QDict, obj); |
4366 | |
4367 | qdict_flatten(qdict); |
4368 | |
4369 | if (!qdict_get_try_str(qdict, "node-name" )) { |
4370 | error_setg(errp, "'node-name' must be specified for the root node" ); |
4371 | goto fail; |
4372 | } |
4373 | |
4374 | bs = bds_tree_init(qdict, errp); |
4375 | if (!bs) { |
4376 | goto fail; |
4377 | } |
4378 | |
4379 | QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list); |
4380 | |
4381 | fail: |
4382 | visit_free(v); |
4383 | } |
4384 | |
4385 | void qmp_x_blockdev_reopen(BlockdevOptions *options, Error **errp) |
4386 | { |
4387 | BlockDriverState *bs; |
4388 | AioContext *ctx; |
4389 | QObject *obj; |
4390 | Visitor *v = qobject_output_visitor_new(&obj); |
4391 | Error *local_err = NULL; |
4392 | BlockReopenQueue *queue; |
4393 | QDict *qdict; |
4394 | |
4395 | /* Check for the selected node name */ |
4396 | if (!options->has_node_name) { |
4397 | error_setg(errp, "Node name not specified" ); |
4398 | goto fail; |
4399 | } |
4400 | |
4401 | bs = bdrv_find_node(options->node_name); |
4402 | if (!bs) { |
4403 | error_setg(errp, "Cannot find node named '%s'" , options->node_name); |
4404 | goto fail; |
4405 | } |
4406 | |
4407 | /* Put all options in a QDict and flatten it */ |
4408 | visit_type_BlockdevOptions(v, NULL, &options, &local_err); |
4409 | if (local_err) { |
4410 | error_propagate(errp, local_err); |
4411 | goto fail; |
4412 | } |
4413 | |
4414 | visit_complete(v, &obj); |
4415 | qdict = qobject_to(QDict, obj); |
4416 | |
4417 | qdict_flatten(qdict); |
4418 | |
4419 | /* Perform the reopen operation */ |
4420 | ctx = bdrv_get_aio_context(bs); |
4421 | aio_context_acquire(ctx); |
4422 | bdrv_subtree_drained_begin(bs); |
4423 | queue = bdrv_reopen_queue(NULL, bs, qdict, false); |
4424 | bdrv_reopen_multiple(queue, errp); |
4425 | bdrv_subtree_drained_end(bs); |
4426 | aio_context_release(ctx); |
4427 | |
4428 | fail: |
4429 | visit_free(v); |
4430 | } |
4431 | |
4432 | void qmp_blockdev_del(const char *node_name, Error **errp) |
4433 | { |
4434 | AioContext *aio_context; |
4435 | BlockDriverState *bs; |
4436 | |
4437 | bs = bdrv_find_node(node_name); |
4438 | if (!bs) { |
4439 | error_setg(errp, "Cannot find node %s" , node_name); |
4440 | return; |
4441 | } |
4442 | if (bdrv_has_blk(bs)) { |
4443 | error_setg(errp, "Node %s is in use" , node_name); |
4444 | return; |
4445 | } |
4446 | aio_context = bdrv_get_aio_context(bs); |
4447 | aio_context_acquire(aio_context); |
4448 | |
4449 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, errp)) { |
4450 | goto out; |
4451 | } |
4452 | |
4453 | if (!QTAILQ_IN_USE(bs, monitor_list)) { |
4454 | error_setg(errp, "Node %s is not owned by the monitor" , |
4455 | bs->node_name); |
4456 | goto out; |
4457 | } |
4458 | |
4459 | if (bs->refcnt > 1) { |
4460 | error_setg(errp, "Block device %s is in use" , |
4461 | bdrv_get_device_or_node_name(bs)); |
4462 | goto out; |
4463 | } |
4464 | |
4465 | QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list); |
4466 | bdrv_unref(bs); |
4467 | |
4468 | out: |
4469 | aio_context_release(aio_context); |
4470 | } |
4471 | |
4472 | static BdrvChild *bdrv_find_child(BlockDriverState *parent_bs, |
4473 | const char *child_name) |
4474 | { |
4475 | BdrvChild *child; |
4476 | |
4477 | QLIST_FOREACH(child, &parent_bs->children, next) { |
4478 | if (strcmp(child->name, child_name) == 0) { |
4479 | return child; |
4480 | } |
4481 | } |
4482 | |
4483 | return NULL; |
4484 | } |
4485 | |
4486 | void qmp_x_blockdev_change(const char *parent, bool has_child, |
4487 | const char *child, bool has_node, |
4488 | const char *node, Error **errp) |
4489 | { |
4490 | BlockDriverState *parent_bs, *new_bs = NULL; |
4491 | BdrvChild *p_child; |
4492 | |
4493 | parent_bs = bdrv_lookup_bs(parent, parent, errp); |
4494 | if (!parent_bs) { |
4495 | return; |
4496 | } |
4497 | |
4498 | if (has_child == has_node) { |
4499 | if (has_child) { |
4500 | error_setg(errp, "The parameters child and node are in conflict" ); |
4501 | } else { |
4502 | error_setg(errp, "Either child or node must be specified" ); |
4503 | } |
4504 | return; |
4505 | } |
4506 | |
4507 | if (has_child) { |
4508 | p_child = bdrv_find_child(parent_bs, child); |
4509 | if (!p_child) { |
4510 | error_setg(errp, "Node '%s' does not have child '%s'" , |
4511 | parent, child); |
4512 | return; |
4513 | } |
4514 | bdrv_del_child(parent_bs, p_child, errp); |
4515 | } |
4516 | |
4517 | if (has_node) { |
4518 | new_bs = bdrv_find_node(node); |
4519 | if (!new_bs) { |
4520 | error_setg(errp, "Node '%s' not found" , node); |
4521 | return; |
4522 | } |
4523 | bdrv_add_child(parent_bs, new_bs, errp); |
4524 | } |
4525 | } |
4526 | |
4527 | BlockJobInfoList *qmp_query_block_jobs(Error **errp) |
4528 | { |
4529 | BlockJobInfoList *head = NULL, **p_next = &head; |
4530 | BlockJob *job; |
4531 | |
4532 | for (job = block_job_next(NULL); job; job = block_job_next(job)) { |
4533 | BlockJobInfoList *elem; |
4534 | AioContext *aio_context; |
4535 | |
4536 | if (block_job_is_internal(job)) { |
4537 | continue; |
4538 | } |
4539 | elem = g_new0(BlockJobInfoList, 1); |
4540 | aio_context = blk_get_aio_context(job->blk); |
4541 | aio_context_acquire(aio_context); |
4542 | elem->value = block_job_query(job, errp); |
4543 | aio_context_release(aio_context); |
4544 | if (!elem->value) { |
4545 | g_free(elem); |
4546 | qapi_free_BlockJobInfoList(head); |
4547 | return NULL; |
4548 | } |
4549 | *p_next = elem; |
4550 | p_next = &elem->next; |
4551 | } |
4552 | |
4553 | return head; |
4554 | } |
4555 | |
4556 | void qmp_x_blockdev_set_iothread(const char *node_name, StrOrNull *iothread, |
4557 | bool has_force, bool force, Error **errp) |
4558 | { |
4559 | AioContext *old_context; |
4560 | AioContext *new_context; |
4561 | BlockDriverState *bs; |
4562 | |
4563 | bs = bdrv_find_node(node_name); |
4564 | if (!bs) { |
4565 | error_setg(errp, "Cannot find node %s" , node_name); |
4566 | return; |
4567 | } |
4568 | |
4569 | /* Protects against accidents. */ |
4570 | if (!(has_force && force) && bdrv_has_blk(bs)) { |
4571 | error_setg(errp, "Node %s is associated with a BlockBackend and could " |
4572 | "be in use (use force=true to override this check)" , |
4573 | node_name); |
4574 | return; |
4575 | } |
4576 | |
4577 | if (iothread->type == QTYPE_QSTRING) { |
4578 | IOThread *obj = iothread_by_id(iothread->u.s); |
4579 | if (!obj) { |
4580 | error_setg(errp, "Cannot find iothread %s" , iothread->u.s); |
4581 | return; |
4582 | } |
4583 | |
4584 | new_context = iothread_get_aio_context(obj); |
4585 | } else { |
4586 | new_context = qemu_get_aio_context(); |
4587 | } |
4588 | |
4589 | old_context = bdrv_get_aio_context(bs); |
4590 | aio_context_acquire(old_context); |
4591 | |
4592 | bdrv_try_set_aio_context(bs, new_context, errp); |
4593 | |
4594 | aio_context_release(old_context); |
4595 | } |
4596 | |
4597 | void qmp_block_latency_histogram_set( |
4598 | const char *id, |
4599 | bool has_boundaries, uint64List *boundaries, |
4600 | bool has_boundaries_read, uint64List *boundaries_read, |
4601 | bool has_boundaries_write, uint64List *boundaries_write, |
4602 | bool has_boundaries_flush, uint64List *boundaries_flush, |
4603 | Error **errp) |
4604 | { |
4605 | BlockBackend *blk = qmp_get_blk(NULL, id, errp); |
4606 | BlockAcctStats *stats; |
4607 | int ret; |
4608 | |
4609 | if (!blk) { |
4610 | return; |
4611 | } |
4612 | |
4613 | stats = blk_get_stats(blk); |
4614 | |
4615 | if (!has_boundaries && !has_boundaries_read && !has_boundaries_write && |
4616 | !has_boundaries_flush) |
4617 | { |
4618 | block_latency_histograms_clear(stats); |
4619 | return; |
4620 | } |
4621 | |
4622 | if (has_boundaries || has_boundaries_read) { |
4623 | ret = block_latency_histogram_set( |
4624 | stats, BLOCK_ACCT_READ, |
4625 | has_boundaries_read ? boundaries_read : boundaries); |
4626 | if (ret) { |
4627 | error_setg(errp, "Device '%s' set read boundaries fail" , id); |
4628 | return; |
4629 | } |
4630 | } |
4631 | |
4632 | if (has_boundaries || has_boundaries_write) { |
4633 | ret = block_latency_histogram_set( |
4634 | stats, BLOCK_ACCT_WRITE, |
4635 | has_boundaries_write ? boundaries_write : boundaries); |
4636 | if (ret) { |
4637 | error_setg(errp, "Device '%s' set write boundaries fail" , id); |
4638 | return; |
4639 | } |
4640 | } |
4641 | |
4642 | if (has_boundaries || has_boundaries_flush) { |
4643 | ret = block_latency_histogram_set( |
4644 | stats, BLOCK_ACCT_FLUSH, |
4645 | has_boundaries_flush ? boundaries_flush : boundaries); |
4646 | if (ret) { |
4647 | error_setg(errp, "Device '%s' set flush boundaries fail" , id); |
4648 | return; |
4649 | } |
4650 | } |
4651 | } |
4652 | |
4653 | QemuOptsList qemu_common_drive_opts = { |
4654 | .name = "drive" , |
4655 | .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head), |
4656 | .desc = { |
4657 | { |
4658 | .name = "snapshot" , |
4659 | .type = QEMU_OPT_BOOL, |
4660 | .help = "enable/disable snapshot mode" , |
4661 | },{ |
4662 | .name = "aio" , |
4663 | .type = QEMU_OPT_STRING, |
4664 | .help = "host AIO implementation (threads, native)" , |
4665 | },{ |
4666 | .name = BDRV_OPT_CACHE_WB, |
4667 | .type = QEMU_OPT_BOOL, |
4668 | .help = "Enable writeback mode" , |
4669 | },{ |
4670 | .name = "format" , |
4671 | .type = QEMU_OPT_STRING, |
4672 | .help = "disk format (raw, qcow2, ...)" , |
4673 | },{ |
4674 | .name = "rerror" , |
4675 | .type = QEMU_OPT_STRING, |
4676 | .help = "read error action" , |
4677 | },{ |
4678 | .name = "werror" , |
4679 | .type = QEMU_OPT_STRING, |
4680 | .help = "write error action" , |
4681 | },{ |
4682 | .name = BDRV_OPT_READ_ONLY, |
4683 | .type = QEMU_OPT_BOOL, |
4684 | .help = "open drive file as read-only" , |
4685 | }, |
4686 | |
4687 | THROTTLE_OPTS, |
4688 | |
4689 | { |
4690 | .name = "throttling.group" , |
4691 | .type = QEMU_OPT_STRING, |
4692 | .help = "name of the block throttling group" , |
4693 | },{ |
4694 | .name = "copy-on-read" , |
4695 | .type = QEMU_OPT_BOOL, |
4696 | .help = "copy read data from backing file into image file" , |
4697 | },{ |
4698 | .name = "detect-zeroes" , |
4699 | .type = QEMU_OPT_STRING, |
4700 | .help = "try to optimize zero writes (off, on, unmap)" , |
4701 | },{ |
4702 | .name = "stats-account-invalid" , |
4703 | .type = QEMU_OPT_BOOL, |
4704 | .help = "whether to account for invalid I/O operations " |
4705 | "in the statistics" , |
4706 | },{ |
4707 | .name = "stats-account-failed" , |
4708 | .type = QEMU_OPT_BOOL, |
4709 | .help = "whether to account for failed I/O operations " |
4710 | "in the statistics" , |
4711 | }, |
4712 | { /* end of list */ } |
4713 | }, |
4714 | }; |
4715 | |
4716 | QemuOptsList qemu_drive_opts = { |
4717 | .name = "drive" , |
4718 | .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head), |
4719 | .desc = { |
4720 | /* |
4721 | * no elements => accept any params |
4722 | * validation will happen later |
4723 | */ |
4724 | { /* end of list */ } |
4725 | }, |
4726 | }; |
4727 | |