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1 | /* | |
2 | * QEMU host block devices | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
5 | * | |
6 | * This work is licensed under the terms of the GNU GPL, version 2 or | |
7 | * later. See the COPYING file in the top-level directory. | |
8 | * | |
9 | * This file incorporates work covered by the following copyright and | |
10 | * permission notice: | |
11 | * | |
12 | * Copyright (c) 2003-2008 Fabrice Bellard | |
13 | * | |
14 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
15 | * of this software and associated documentation files (the "Software"), to deal | |
16 | * in the Software without restriction, including without limitation the rights | |
17 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
18 | * copies of the Software, and to permit persons to whom the Software is | |
19 | * furnished to do so, subject to the following conditions: | |
20 | * | |
21 | * The above copyright notice and this permission notice shall be included in | |
22 | * all copies or substantial portions of the Software. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
25 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
26 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
27 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
28 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
29 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
30 | * THE SOFTWARE. | |
31 | */ | |
32 | ||
33 | #include "sysemu/block-backend.h" | |
34 | #include "sysemu/blockdev.h" | |
35 | #include "hw/block/block.h" | |
36 | #include "block/blockjob.h" | |
37 | #include "block/throttle-groups.h" | |
38 | #include "monitor/monitor.h" | |
39 | #include "qemu/error-report.h" | |
40 | #include "qemu/option.h" | |
41 | #include "qemu/config-file.h" | |
42 | #include "qapi/qmp/types.h" | |
43 | #include "qapi-visit.h" | |
44 | #include "qapi/qmp/qerror.h" | |
45 | #include "qapi/qmp-output-visitor.h" | |
46 | #include "qapi/util.h" | |
47 | #include "sysemu/sysemu.h" | |
48 | #include "block/block_int.h" | |
49 | #include "qmp-commands.h" | |
50 | #include "trace.h" | |
51 | #include "sysemu/arch_init.h" | |
52 | ||
53 | static const char *const if_name[IF_COUNT] = { | |
54 | [IF_NONE] = "none", | |
55 | [IF_IDE] = "ide", | |
56 | [IF_SCSI] = "scsi", | |
57 | [IF_FLOPPY] = "floppy", | |
58 | [IF_PFLASH] = "pflash", | |
59 | [IF_MTD] = "mtd", | |
60 | [IF_SD] = "sd", | |
61 | [IF_VIRTIO] = "virtio", | |
62 | [IF_XEN] = "xen", | |
63 | }; | |
64 | ||
65 | static int if_max_devs[IF_COUNT] = { | |
66 | /* | |
67 | * Do not change these numbers! They govern how drive option | |
68 | * index maps to unit and bus. That mapping is ABI. | |
69 | * | |
70 | * All controllers used to imlement if=T drives need to support | |
71 | * if_max_devs[T] units, for any T with if_max_devs[T] != 0. | |
72 | * Otherwise, some index values map to "impossible" bus, unit | |
73 | * values. | |
74 | * | |
75 | * For instance, if you change [IF_SCSI] to 255, -drive | |
76 | * if=scsi,index=12 no longer means bus=1,unit=5, but | |
77 | * bus=0,unit=12. With an lsi53c895a controller (7 units max), | |
78 | * the drive can't be set up. Regression. | |
79 | */ | |
80 | [IF_IDE] = 2, | |
81 | [IF_SCSI] = 7, | |
82 | }; | |
83 | ||
84 | /** | |
85 | * Boards may call this to offer board-by-board overrides | |
86 | * of the default, global values. | |
87 | */ | |
88 | void override_max_devs(BlockInterfaceType type, int max_devs) | |
89 | { | |
90 | BlockBackend *blk; | |
91 | DriveInfo *dinfo; | |
92 | ||
93 | if (max_devs <= 0) { | |
94 | return; | |
95 | } | |
96 | ||
97 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { | |
98 | dinfo = blk_legacy_dinfo(blk); | |
99 | if (dinfo->type == type) { | |
100 | fprintf(stderr, "Cannot override units-per-bus property of" | |
101 | " the %s interface, because a drive of that type has" | |
102 | " already been added.\n", if_name[type]); | |
103 | g_assert_not_reached(); | |
104 | } | |
105 | } | |
106 | ||
107 | if_max_devs[type] = max_devs; | |
108 | } | |
109 | ||
110 | /* | |
111 | * We automatically delete the drive when a device using it gets | |
112 | * unplugged. Questionable feature, but we can't just drop it. | |
113 | * Device models call blockdev_mark_auto_del() to schedule the | |
114 | * automatic deletion, and generic qdev code calls blockdev_auto_del() | |
115 | * when deletion is actually safe. | |
116 | */ | |
117 | void blockdev_mark_auto_del(BlockBackend *blk) | |
118 | { | |
119 | DriveInfo *dinfo = blk_legacy_dinfo(blk); | |
120 | BlockDriverState *bs = blk_bs(blk); | |
121 | AioContext *aio_context; | |
122 | ||
123 | if (!dinfo) { | |
124 | return; | |
125 | } | |
126 | ||
127 | if (bs) { | |
128 | aio_context = bdrv_get_aio_context(bs); | |
129 | aio_context_acquire(aio_context); | |
130 | ||
131 | if (bs->job) { | |
132 | block_job_cancel(bs->job); | |
133 | } | |
134 | ||
135 | aio_context_release(aio_context); | |
136 | } | |
137 | ||
138 | dinfo->auto_del = 1; | |
139 | } | |
140 | ||
141 | void blockdev_auto_del(BlockBackend *blk) | |
142 | { | |
143 | DriveInfo *dinfo = blk_legacy_dinfo(blk); | |
144 | ||
145 | if (dinfo && dinfo->auto_del) { | |
146 | blk_unref(blk); | |
147 | } | |
148 | } | |
149 | ||
150 | /** | |
151 | * Returns the current mapping of how many units per bus | |
152 | * a particular interface can support. | |
153 | * | |
154 | * A positive integer indicates n units per bus. | |
155 | * 0 implies the mapping has not been established. | |
156 | * -1 indicates an invalid BlockInterfaceType was given. | |
157 | */ | |
158 | int drive_get_max_devs(BlockInterfaceType type) | |
159 | { | |
160 | if (type >= IF_IDE && type < IF_COUNT) { | |
161 | return if_max_devs[type]; | |
162 | } | |
163 | ||
164 | return -1; | |
165 | } | |
166 | ||
167 | static int drive_index_to_bus_id(BlockInterfaceType type, int index) | |
168 | { | |
169 | int max_devs = if_max_devs[type]; | |
170 | return max_devs ? index / max_devs : 0; | |
171 | } | |
172 | ||
173 | static int drive_index_to_unit_id(BlockInterfaceType type, int index) | |
174 | { | |
175 | int max_devs = if_max_devs[type]; | |
176 | return max_devs ? index % max_devs : index; | |
177 | } | |
178 | ||
179 | QemuOpts *drive_def(const char *optstr) | |
180 | { | |
181 | return qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr, false); | |
182 | } | |
183 | ||
184 | QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, | |
185 | const char *optstr) | |
186 | { | |
187 | QemuOpts *opts; | |
188 | ||
189 | opts = drive_def(optstr); | |
190 | if (!opts) { | |
191 | return NULL; | |
192 | } | |
193 | if (type != IF_DEFAULT) { | |
194 | qemu_opt_set(opts, "if", if_name[type], &error_abort); | |
195 | } | |
196 | if (index >= 0) { | |
197 | qemu_opt_set_number(opts, "index", index, &error_abort); | |
198 | } | |
199 | if (file) | |
200 | qemu_opt_set(opts, "file", file, &error_abort); | |
201 | return opts; | |
202 | } | |
203 | ||
204 | DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) | |
205 | { | |
206 | BlockBackend *blk; | |
207 | DriveInfo *dinfo; | |
208 | ||
209 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { | |
210 | dinfo = blk_legacy_dinfo(blk); | |
211 | if (dinfo && dinfo->type == type | |
212 | && dinfo->bus == bus && dinfo->unit == unit) { | |
213 | return dinfo; | |
214 | } | |
215 | } | |
216 | ||
217 | return NULL; | |
218 | } | |
219 | ||
220 | bool drive_check_orphaned(void) | |
221 | { | |
222 | BlockBackend *blk; | |
223 | DriveInfo *dinfo; | |
224 | bool rs = false; | |
225 | ||
226 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { | |
227 | dinfo = blk_legacy_dinfo(blk); | |
228 | /* If dinfo->bdrv->dev is NULL, it has no device attached. */ | |
229 | /* Unless this is a default drive, this may be an oversight. */ | |
230 | if (!blk_get_attached_dev(blk) && !dinfo->is_default && | |
231 | dinfo->type != IF_NONE) { | |
232 | fprintf(stderr, "Warning: Orphaned drive without device: " | |
233 | "id=%s,file=%s,if=%s,bus=%d,unit=%d\n", | |
234 | blk_name(blk), blk_bs(blk) ? blk_bs(blk)->filename : "", | |
235 | if_name[dinfo->type], dinfo->bus, dinfo->unit); | |
236 | rs = true; | |
237 | } | |
238 | } | |
239 | ||
240 | return rs; | |
241 | } | |
242 | ||
243 | DriveInfo *drive_get_by_index(BlockInterfaceType type, int index) | |
244 | { | |
245 | return drive_get(type, | |
246 | drive_index_to_bus_id(type, index), | |
247 | drive_index_to_unit_id(type, index)); | |
248 | } | |
249 | ||
250 | int drive_get_max_bus(BlockInterfaceType type) | |
251 | { | |
252 | int max_bus; | |
253 | BlockBackend *blk; | |
254 | DriveInfo *dinfo; | |
255 | ||
256 | max_bus = -1; | |
257 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { | |
258 | dinfo = blk_legacy_dinfo(blk); | |
259 | if (dinfo && dinfo->type == type && dinfo->bus > max_bus) { | |
260 | max_bus = dinfo->bus; | |
261 | } | |
262 | } | |
263 | return max_bus; | |
264 | } | |
265 | ||
266 | /* Get a block device. This should only be used for single-drive devices | |
267 | (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the | |
268 | appropriate bus. */ | |
269 | DriveInfo *drive_get_next(BlockInterfaceType type) | |
270 | { | |
271 | static int next_block_unit[IF_COUNT]; | |
272 | ||
273 | return drive_get(type, 0, next_block_unit[type]++); | |
274 | } | |
275 | ||
276 | static void bdrv_format_print(void *opaque, const char *name) | |
277 | { | |
278 | error_printf(" %s", name); | |
279 | } | |
280 | ||
281 | typedef struct { | |
282 | QEMUBH *bh; | |
283 | BlockDriverState *bs; | |
284 | } BDRVPutRefBH; | |
285 | ||
286 | static int parse_block_error_action(const char *buf, bool is_read, Error **errp) | |
287 | { | |
288 | if (!strcmp(buf, "ignore")) { | |
289 | return BLOCKDEV_ON_ERROR_IGNORE; | |
290 | } else if (!is_read && !strcmp(buf, "enospc")) { | |
291 | return BLOCKDEV_ON_ERROR_ENOSPC; | |
292 | } else if (!strcmp(buf, "stop")) { | |
293 | return BLOCKDEV_ON_ERROR_STOP; | |
294 | } else if (!strcmp(buf, "report")) { | |
295 | return BLOCKDEV_ON_ERROR_REPORT; | |
296 | } else { | |
297 | error_setg(errp, "'%s' invalid %s error action", | |
298 | buf, is_read ? "read" : "write"); | |
299 | return -1; | |
300 | } | |
301 | } | |
302 | ||
303 | static bool parse_stats_intervals(BlockAcctStats *stats, QList *intervals, | |
304 | Error **errp) | |
305 | { | |
306 | const QListEntry *entry; | |
307 | for (entry = qlist_first(intervals); entry; entry = qlist_next(entry)) { | |
308 | switch (qobject_type(entry->value)) { | |
309 | ||
310 | case QTYPE_QSTRING: { | |
311 | unsigned long long length; | |
312 | const char *str = qstring_get_str(qobject_to_qstring(entry->value)); | |
313 | if (parse_uint_full(str, &length, 10) == 0 && | |
314 | length > 0 && length <= UINT_MAX) { | |
315 | block_acct_add_interval(stats, (unsigned) length); | |
316 | } else { | |
317 | error_setg(errp, "Invalid interval length: %s", str); | |
318 | return false; | |
319 | } | |
320 | break; | |
321 | } | |
322 | ||
323 | case QTYPE_QINT: { | |
324 | int64_t length = qint_get_int(qobject_to_qint(entry->value)); | |
325 | if (length > 0 && length <= UINT_MAX) { | |
326 | block_acct_add_interval(stats, (unsigned) length); | |
327 | } else { | |
328 | error_setg(errp, "Invalid interval length: %" PRId64, length); | |
329 | return false; | |
330 | } | |
331 | break; | |
332 | } | |
333 | ||
334 | default: | |
335 | error_setg(errp, "The specification of stats-intervals is invalid"); | |
336 | return false; | |
337 | } | |
338 | } | |
339 | return true; | |
340 | } | |
341 | ||
342 | static bool check_throttle_config(ThrottleConfig *cfg, Error **errp) | |
343 | { | |
344 | if (throttle_conflicting(cfg)) { | |
345 | error_setg(errp, "bps/iops/max total values and read/write values" | |
346 | " cannot be used at the same time"); | |
347 | return false; | |
348 | } | |
349 | ||
350 | if (!throttle_is_valid(cfg)) { | |
351 | error_setg(errp, "bps/iops/max values must be within [0, %lld]", | |
352 | THROTTLE_VALUE_MAX); | |
353 | return false; | |
354 | } | |
355 | ||
356 | if (throttle_max_is_missing_limit(cfg)) { | |
357 | error_setg(errp, "bps_max/iops_max require corresponding" | |
358 | " bps/iops values"); | |
359 | return false; | |
360 | } | |
361 | ||
362 | return true; | |
363 | } | |
364 | ||
365 | typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType; | |
366 | ||
367 | /* All parameters but @opts are optional and may be set to NULL. */ | |
368 | static void extract_common_blockdev_options(QemuOpts *opts, int *bdrv_flags, | |
369 | const char **throttling_group, ThrottleConfig *throttle_cfg, | |
370 | BlockdevDetectZeroesOptions *detect_zeroes, Error **errp) | |
371 | { | |
372 | const char *discard; | |
373 | Error *local_error = NULL; | |
374 | const char *aio; | |
375 | ||
376 | if (bdrv_flags) { | |
377 | if (!qemu_opt_get_bool(opts, "read-only", false)) { | |
378 | *bdrv_flags |= BDRV_O_RDWR; | |
379 | } | |
380 | if (qemu_opt_get_bool(opts, "copy-on-read", false)) { | |
381 | *bdrv_flags |= BDRV_O_COPY_ON_READ; | |
382 | } | |
383 | ||
384 | if ((discard = qemu_opt_get(opts, "discard")) != NULL) { | |
385 | if (bdrv_parse_discard_flags(discard, bdrv_flags) != 0) { | |
386 | error_setg(errp, "Invalid discard option"); | |
387 | return; | |
388 | } | |
389 | } | |
390 | ||
391 | if ((aio = qemu_opt_get(opts, "aio")) != NULL) { | |
392 | if (!strcmp(aio, "native")) { | |
393 | *bdrv_flags |= BDRV_O_NATIVE_AIO; | |
394 | } else if (!strcmp(aio, "threads")) { | |
395 | /* this is the default */ | |
396 | } else { | |
397 | error_setg(errp, "invalid aio option"); | |
398 | return; | |
399 | } | |
400 | } | |
401 | } | |
402 | ||
403 | /* disk I/O throttling */ | |
404 | if (throttling_group) { | |
405 | *throttling_group = qemu_opt_get(opts, "throttling.group"); | |
406 | } | |
407 | ||
408 | if (throttle_cfg) { | |
409 | memset(throttle_cfg, 0, sizeof(*throttle_cfg)); | |
410 | throttle_cfg->buckets[THROTTLE_BPS_TOTAL].avg = | |
411 | qemu_opt_get_number(opts, "throttling.bps-total", 0); | |
412 | throttle_cfg->buckets[THROTTLE_BPS_READ].avg = | |
413 | qemu_opt_get_number(opts, "throttling.bps-read", 0); | |
414 | throttle_cfg->buckets[THROTTLE_BPS_WRITE].avg = | |
415 | qemu_opt_get_number(opts, "throttling.bps-write", 0); | |
416 | throttle_cfg->buckets[THROTTLE_OPS_TOTAL].avg = | |
417 | qemu_opt_get_number(opts, "throttling.iops-total", 0); | |
418 | throttle_cfg->buckets[THROTTLE_OPS_READ].avg = | |
419 | qemu_opt_get_number(opts, "throttling.iops-read", 0); | |
420 | throttle_cfg->buckets[THROTTLE_OPS_WRITE].avg = | |
421 | qemu_opt_get_number(opts, "throttling.iops-write", 0); | |
422 | ||
423 | throttle_cfg->buckets[THROTTLE_BPS_TOTAL].max = | |
424 | qemu_opt_get_number(opts, "throttling.bps-total-max", 0); | |
425 | throttle_cfg->buckets[THROTTLE_BPS_READ].max = | |
426 | qemu_opt_get_number(opts, "throttling.bps-read-max", 0); | |
427 | throttle_cfg->buckets[THROTTLE_BPS_WRITE].max = | |
428 | qemu_opt_get_number(opts, "throttling.bps-write-max", 0); | |
429 | throttle_cfg->buckets[THROTTLE_OPS_TOTAL].max = | |
430 | qemu_opt_get_number(opts, "throttling.iops-total-max", 0); | |
431 | throttle_cfg->buckets[THROTTLE_OPS_READ].max = | |
432 | qemu_opt_get_number(opts, "throttling.iops-read-max", 0); | |
433 | throttle_cfg->buckets[THROTTLE_OPS_WRITE].max = | |
434 | qemu_opt_get_number(opts, "throttling.iops-write-max", 0); | |
435 | ||
436 | throttle_cfg->op_size = | |
437 | qemu_opt_get_number(opts, "throttling.iops-size", 0); | |
438 | ||
439 | if (!check_throttle_config(throttle_cfg, errp)) { | |
440 | return; | |
441 | } | |
442 | } | |
443 | ||
444 | if (detect_zeroes) { | |
445 | *detect_zeroes = | |
446 | qapi_enum_parse(BlockdevDetectZeroesOptions_lookup, | |
447 | qemu_opt_get(opts, "detect-zeroes"), | |
448 | BLOCKDEV_DETECT_ZEROES_OPTIONS__MAX, | |
449 | BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, | |
450 | &local_error); | |
451 | if (local_error) { | |
452 | error_propagate(errp, local_error); | |
453 | return; | |
454 | } | |
455 | ||
456 | if (bdrv_flags && | |
457 | *detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && | |
458 | !(*bdrv_flags & BDRV_O_UNMAP)) | |
459 | { | |
460 | error_setg(errp, "setting detect-zeroes to unmap is not allowed " | |
461 | "without setting discard operation to unmap"); | |
462 | return; | |
463 | } | |
464 | } | |
465 | } | |
466 | ||
467 | /* Takes the ownership of bs_opts */ | |
468 | static BlockBackend *blockdev_init(const char *file, QDict *bs_opts, | |
469 | Error **errp) | |
470 | { | |
471 | const char *buf; | |
472 | int bdrv_flags = 0; | |
473 | int on_read_error, on_write_error; | |
474 | bool account_invalid, account_failed; | |
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 | qdict_extract_subqdict(bs_opts, &interval_dict, "stats-intervals."); | |
514 | qdict_array_split(interval_dict, &interval_list); | |
515 | ||
516 | if (qdict_size(interval_dict) != 0) { | |
517 | error_setg(errp, "Invalid option stats-intervals.%s", | |
518 | qdict_first(interval_dict)->key); | |
519 | goto early_err; | |
520 | } | |
521 | ||
522 | extract_common_blockdev_options(opts, &bdrv_flags, &throttling_group, &cfg, | |
523 | &detect_zeroes, &error); | |
524 | if (error) { | |
525 | error_propagate(errp, error); | |
526 | goto early_err; | |
527 | } | |
528 | ||
529 | if ((buf = qemu_opt_get(opts, "format")) != NULL) { | |
530 | if (is_help_option(buf)) { | |
531 | error_printf("Supported formats:"); | |
532 | bdrv_iterate_format(bdrv_format_print, NULL); | |
533 | error_printf("\n"); | |
534 | goto early_err; | |
535 | } | |
536 | ||
537 | if (qdict_haskey(bs_opts, "driver")) { | |
538 | error_setg(errp, "Cannot specify both 'driver' and 'format'"); | |
539 | goto early_err; | |
540 | } | |
541 | qdict_put(bs_opts, "driver", qstring_from_str(buf)); | |
542 | } | |
543 | ||
544 | on_write_error = BLOCKDEV_ON_ERROR_ENOSPC; | |
545 | if ((buf = qemu_opt_get(opts, "werror")) != NULL) { | |
546 | on_write_error = parse_block_error_action(buf, 0, &error); | |
547 | if (error) { | |
548 | error_propagate(errp, error); | |
549 | goto early_err; | |
550 | } | |
551 | } | |
552 | ||
553 | on_read_error = BLOCKDEV_ON_ERROR_REPORT; | |
554 | if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { | |
555 | on_read_error = parse_block_error_action(buf, 1, &error); | |
556 | if (error) { | |
557 | error_propagate(errp, error); | |
558 | goto early_err; | |
559 | } | |
560 | } | |
561 | ||
562 | if (snapshot) { | |
563 | bdrv_flags |= BDRV_O_SNAPSHOT; | |
564 | } | |
565 | ||
566 | /* init */ | |
567 | if ((!file || !*file) && !qdict_size(bs_opts)) { | |
568 | BlockBackendRootState *blk_rs; | |
569 | ||
570 | blk = blk_new(qemu_opts_id(opts), errp); | |
571 | if (!blk) { | |
572 | goto early_err; | |
573 | } | |
574 | ||
575 | blk_rs = blk_get_root_state(blk); | |
576 | blk_rs->open_flags = bdrv_flags; | |
577 | blk_rs->read_only = !(bdrv_flags & BDRV_O_RDWR); | |
578 | blk_rs->detect_zeroes = detect_zeroes; | |
579 | ||
580 | if (throttle_enabled(&cfg)) { | |
581 | if (!throttling_group) { | |
582 | throttling_group = blk_name(blk); | |
583 | } | |
584 | blk_rs->throttle_group = g_strdup(throttling_group); | |
585 | blk_rs->throttle_state = throttle_group_incref(throttling_group); | |
586 | blk_rs->throttle_state->cfg = cfg; | |
587 | } | |
588 | ||
589 | QDECREF(bs_opts); | |
590 | } else { | |
591 | if (file && !*file) { | |
592 | file = NULL; | |
593 | } | |
594 | ||
595 | /* bdrv_open() defaults to the values in bdrv_flags (for compatibility | |
596 | * with other callers) rather than what we want as the real defaults. | |
597 | * Apply the defaults here instead. */ | |
598 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_WB, "on"); | |
599 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off"); | |
600 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off"); | |
601 | ||
602 | if (snapshot) { | |
603 | /* always use cache=unsafe with snapshot */ | |
604 | qdict_put(bs_opts, BDRV_OPT_CACHE_WB, qstring_from_str("on")); | |
605 | qdict_put(bs_opts, BDRV_OPT_CACHE_DIRECT, qstring_from_str("off")); | |
606 | qdict_put(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, qstring_from_str("on")); | |
607 | } | |
608 | ||
609 | blk = blk_new_open(qemu_opts_id(opts), file, NULL, bs_opts, bdrv_flags, | |
610 | errp); | |
611 | if (!blk) { | |
612 | goto err_no_bs_opts; | |
613 | } | |
614 | bs = blk_bs(blk); | |
615 | ||
616 | bs->detect_zeroes = detect_zeroes; | |
617 | ||
618 | /* disk I/O throttling */ | |
619 | if (throttle_enabled(&cfg)) { | |
620 | if (!throttling_group) { | |
621 | throttling_group = blk_name(blk); | |
622 | } | |
623 | bdrv_io_limits_enable(bs, throttling_group); | |
624 | bdrv_set_io_limits(bs, &cfg); | |
625 | } | |
626 | ||
627 | if (bdrv_key_required(bs)) { | |
628 | autostart = 0; | |
629 | } | |
630 | ||
631 | block_acct_init(blk_get_stats(blk), account_invalid, account_failed); | |
632 | ||
633 | if (!parse_stats_intervals(blk_get_stats(blk), interval_list, errp)) { | |
634 | blk_unref(blk); | |
635 | blk = NULL; | |
636 | goto err_no_bs_opts; | |
637 | } | |
638 | } | |
639 | ||
640 | blk_set_on_error(blk, on_read_error, on_write_error); | |
641 | ||
642 | err_no_bs_opts: | |
643 | qemu_opts_del(opts); | |
644 | QDECREF(interval_dict); | |
645 | QDECREF(interval_list); | |
646 | return blk; | |
647 | ||
648 | early_err: | |
649 | qemu_opts_del(opts); | |
650 | QDECREF(interval_dict); | |
651 | QDECREF(interval_list); | |
652 | err_no_opts: | |
653 | QDECREF(bs_opts); | |
654 | return NULL; | |
655 | } | |
656 | ||
657 | static QemuOptsList qemu_root_bds_opts; | |
658 | ||
659 | /* Takes the ownership of bs_opts */ | |
660 | static BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp) | |
661 | { | |
662 | BlockDriverState *bs; | |
663 | QemuOpts *opts; | |
664 | Error *local_error = NULL; | |
665 | BlockdevDetectZeroesOptions detect_zeroes; | |
666 | int ret; | |
667 | int bdrv_flags = 0; | |
668 | ||
669 | opts = qemu_opts_create(&qemu_root_bds_opts, NULL, 1, errp); | |
670 | if (!opts) { | |
671 | goto fail; | |
672 | } | |
673 | ||
674 | qemu_opts_absorb_qdict(opts, bs_opts, &local_error); | |
675 | if (local_error) { | |
676 | error_propagate(errp, local_error); | |
677 | goto fail; | |
678 | } | |
679 | ||
680 | extract_common_blockdev_options(opts, &bdrv_flags, NULL, NULL, | |
681 | &detect_zeroes, &local_error); | |
682 | if (local_error) { | |
683 | error_propagate(errp, local_error); | |
684 | goto fail; | |
685 | } | |
686 | ||
687 | bs = NULL; | |
688 | ret = bdrv_open(&bs, NULL, NULL, bs_opts, bdrv_flags, errp); | |
689 | if (ret < 0) { | |
690 | goto fail_no_bs_opts; | |
691 | } | |
692 | ||
693 | bs->detect_zeroes = detect_zeroes; | |
694 | ||
695 | fail_no_bs_opts: | |
696 | qemu_opts_del(opts); | |
697 | return bs; | |
698 | ||
699 | fail: | |
700 | qemu_opts_del(opts); | |
701 | QDECREF(bs_opts); | |
702 | return NULL; | |
703 | } | |
704 | ||
705 | static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to, | |
706 | Error **errp) | |
707 | { | |
708 | const char *value; | |
709 | ||
710 | value = qemu_opt_get(opts, from); | |
711 | if (value) { | |
712 | if (qemu_opt_find(opts, to)) { | |
713 | error_setg(errp, "'%s' and its alias '%s' can't be used at the " | |
714 | "same time", to, from); | |
715 | return; | |
716 | } | |
717 | } | |
718 | ||
719 | /* rename all items in opts */ | |
720 | while ((value = qemu_opt_get(opts, from))) { | |
721 | qemu_opt_set(opts, to, value, &error_abort); | |
722 | qemu_opt_unset(opts, from); | |
723 | } | |
724 | } | |
725 | ||
726 | QemuOptsList qemu_legacy_drive_opts = { | |
727 | .name = "drive", | |
728 | .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head), | |
729 | .desc = { | |
730 | { | |
731 | .name = "bus", | |
732 | .type = QEMU_OPT_NUMBER, | |
733 | .help = "bus number", | |
734 | },{ | |
735 | .name = "unit", | |
736 | .type = QEMU_OPT_NUMBER, | |
737 | .help = "unit number (i.e. lun for scsi)", | |
738 | },{ | |
739 | .name = "index", | |
740 | .type = QEMU_OPT_NUMBER, | |
741 | .help = "index number", | |
742 | },{ | |
743 | .name = "media", | |
744 | .type = QEMU_OPT_STRING, | |
745 | .help = "media type (disk, cdrom)", | |
746 | },{ | |
747 | .name = "if", | |
748 | .type = QEMU_OPT_STRING, | |
749 | .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)", | |
750 | },{ | |
751 | .name = "cyls", | |
752 | .type = QEMU_OPT_NUMBER, | |
753 | .help = "number of cylinders (ide disk geometry)", | |
754 | },{ | |
755 | .name = "heads", | |
756 | .type = QEMU_OPT_NUMBER, | |
757 | .help = "number of heads (ide disk geometry)", | |
758 | },{ | |
759 | .name = "secs", | |
760 | .type = QEMU_OPT_NUMBER, | |
761 | .help = "number of sectors (ide disk geometry)", | |
762 | },{ | |
763 | .name = "trans", | |
764 | .type = QEMU_OPT_STRING, | |
765 | .help = "chs translation (auto, lba, none)", | |
766 | },{ | |
767 | .name = "boot", | |
768 | .type = QEMU_OPT_BOOL, | |
769 | .help = "(deprecated, ignored)", | |
770 | },{ | |
771 | .name = "addr", | |
772 | .type = QEMU_OPT_STRING, | |
773 | .help = "pci address (virtio only)", | |
774 | },{ | |
775 | .name = "serial", | |
776 | .type = QEMU_OPT_STRING, | |
777 | .help = "disk serial number", | |
778 | },{ | |
779 | .name = "file", | |
780 | .type = QEMU_OPT_STRING, | |
781 | .help = "file name", | |
782 | }, | |
783 | ||
784 | /* Options that are passed on, but have special semantics with -drive */ | |
785 | { | |
786 | .name = "read-only", | |
787 | .type = QEMU_OPT_BOOL, | |
788 | .help = "open drive file as read-only", | |
789 | },{ | |
790 | .name = "rerror", | |
791 | .type = QEMU_OPT_STRING, | |
792 | .help = "read error action", | |
793 | },{ | |
794 | .name = "werror", | |
795 | .type = QEMU_OPT_STRING, | |
796 | .help = "write error action", | |
797 | },{ | |
798 | .name = "copy-on-read", | |
799 | .type = QEMU_OPT_BOOL, | |
800 | .help = "copy read data from backing file into image file", | |
801 | }, | |
802 | ||
803 | { /* end of list */ } | |
804 | }, | |
805 | }; | |
806 | ||
807 | DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type) | |
808 | { | |
809 | const char *value; | |
810 | BlockBackend *blk; | |
811 | DriveInfo *dinfo = NULL; | |
812 | QDict *bs_opts; | |
813 | QemuOpts *legacy_opts; | |
814 | DriveMediaType media = MEDIA_DISK; | |
815 | BlockInterfaceType type; | |
816 | int cyls, heads, secs, translation; | |
817 | int max_devs, bus_id, unit_id, index; | |
818 | const char *devaddr; | |
819 | const char *werror, *rerror; | |
820 | bool read_only = false; | |
821 | bool copy_on_read; | |
822 | const char *serial; | |
823 | const char *filename; | |
824 | Error *local_err = NULL; | |
825 | int i; | |
826 | ||
827 | /* Change legacy command line options into QMP ones */ | |
828 | static const struct { | |
829 | const char *from; | |
830 | const char *to; | |
831 | } opt_renames[] = { | |
832 | { "iops", "throttling.iops-total" }, | |
833 | { "iops_rd", "throttling.iops-read" }, | |
834 | { "iops_wr", "throttling.iops-write" }, | |
835 | ||
836 | { "bps", "throttling.bps-total" }, | |
837 | { "bps_rd", "throttling.bps-read" }, | |
838 | { "bps_wr", "throttling.bps-write" }, | |
839 | ||
840 | { "iops_max", "throttling.iops-total-max" }, | |
841 | { "iops_rd_max", "throttling.iops-read-max" }, | |
842 | { "iops_wr_max", "throttling.iops-write-max" }, | |
843 | ||
844 | { "bps_max", "throttling.bps-total-max" }, | |
845 | { "bps_rd_max", "throttling.bps-read-max" }, | |
846 | { "bps_wr_max", "throttling.bps-write-max" }, | |
847 | ||
848 | { "iops_size", "throttling.iops-size" }, | |
849 | ||
850 | { "group", "throttling.group" }, | |
851 | ||
852 | { "readonly", "read-only" }, | |
853 | }; | |
854 | ||
855 | for (i = 0; i < ARRAY_SIZE(opt_renames); i++) { | |
856 | qemu_opt_rename(all_opts, opt_renames[i].from, opt_renames[i].to, | |
857 | &local_err); | |
858 | if (local_err) { | |
859 | error_report_err(local_err); | |
860 | return NULL; | |
861 | } | |
862 | } | |
863 | ||
864 | value = qemu_opt_get(all_opts, "cache"); | |
865 | if (value) { | |
866 | int flags = 0; | |
867 | ||
868 | if (bdrv_parse_cache_flags(value, &flags) != 0) { | |
869 | error_report("invalid cache option"); | |
870 | return NULL; | |
871 | } | |
872 | ||
873 | /* Specific options take precedence */ | |
874 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_WB)) { | |
875 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_WB, | |
876 | !!(flags & BDRV_O_CACHE_WB), &error_abort); | |
877 | } | |
878 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_DIRECT)) { | |
879 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_DIRECT, | |
880 | !!(flags & BDRV_O_NOCACHE), &error_abort); | |
881 | } | |
882 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_NO_FLUSH)) { | |
883 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_NO_FLUSH, | |
884 | !!(flags & BDRV_O_NO_FLUSH), &error_abort); | |
885 | } | |
886 | qemu_opt_unset(all_opts, "cache"); | |
887 | } | |
888 | ||
889 | /* Get a QDict for processing the options */ | |
890 | bs_opts = qdict_new(); | |
891 | qemu_opts_to_qdict(all_opts, bs_opts); | |
892 | ||
893 | legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0, | |
894 | &error_abort); | |
895 | qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err); | |
896 | if (local_err) { | |
897 | error_report_err(local_err); | |
898 | goto fail; | |
899 | } | |
900 | ||
901 | /* Deprecated option boot=[on|off] */ | |
902 | if (qemu_opt_get(legacy_opts, "boot") != NULL) { | |
903 | fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be " | |
904 | "ignored. Future versions will reject this parameter. Please " | |
905 | "update your scripts.\n"); | |
906 | } | |
907 | ||
908 | /* Media type */ | |
909 | value = qemu_opt_get(legacy_opts, "media"); | |
910 | if (value) { | |
911 | if (!strcmp(value, "disk")) { | |
912 | media = MEDIA_DISK; | |
913 | } else if (!strcmp(value, "cdrom")) { | |
914 | media = MEDIA_CDROM; | |
915 | read_only = true; | |
916 | } else { | |
917 | error_report("'%s' invalid media", value); | |
918 | goto fail; | |
919 | } | |
920 | } | |
921 | ||
922 | /* copy-on-read is disabled with a warning for read-only devices */ | |
923 | read_only |= qemu_opt_get_bool(legacy_opts, "read-only", false); | |
924 | copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false); | |
925 | ||
926 | if (read_only && copy_on_read) { | |
927 | error_report("warning: disabling copy-on-read on read-only drive"); | |
928 | copy_on_read = false; | |
929 | } | |
930 | ||
931 | qdict_put(bs_opts, "read-only", | |
932 | qstring_from_str(read_only ? "on" : "off")); | |
933 | qdict_put(bs_opts, "copy-on-read", | |
934 | qstring_from_str(copy_on_read ? "on" :"off")); | |
935 | ||
936 | /* Controller type */ | |
937 | value = qemu_opt_get(legacy_opts, "if"); | |
938 | if (value) { | |
939 | for (type = 0; | |
940 | type < IF_COUNT && strcmp(value, if_name[type]); | |
941 | type++) { | |
942 | } | |
943 | if (type == IF_COUNT) { | |
944 | error_report("unsupported bus type '%s'", value); | |
945 | goto fail; | |
946 | } | |
947 | } else { | |
948 | type = block_default_type; | |
949 | } | |
950 | ||
951 | /* Geometry */ | |
952 | cyls = qemu_opt_get_number(legacy_opts, "cyls", 0); | |
953 | heads = qemu_opt_get_number(legacy_opts, "heads", 0); | |
954 | secs = qemu_opt_get_number(legacy_opts, "secs", 0); | |
955 | ||
956 | if (cyls || heads || secs) { | |
957 | if (cyls < 1) { | |
958 | error_report("invalid physical cyls number"); | |
959 | goto fail; | |
960 | } | |
961 | if (heads < 1) { | |
962 | error_report("invalid physical heads number"); | |
963 | goto fail; | |
964 | } | |
965 | if (secs < 1) { | |
966 | error_report("invalid physical secs number"); | |
967 | goto fail; | |
968 | } | |
969 | } | |
970 | ||
971 | translation = BIOS_ATA_TRANSLATION_AUTO; | |
972 | value = qemu_opt_get(legacy_opts, "trans"); | |
973 | if (value != NULL) { | |
974 | if (!cyls) { | |
975 | error_report("'%s' trans must be used with cyls, heads and secs", | |
976 | value); | |
977 | goto fail; | |
978 | } | |
979 | if (!strcmp(value, "none")) { | |
980 | translation = BIOS_ATA_TRANSLATION_NONE; | |
981 | } else if (!strcmp(value, "lba")) { | |
982 | translation = BIOS_ATA_TRANSLATION_LBA; | |
983 | } else if (!strcmp(value, "large")) { | |
984 | translation = BIOS_ATA_TRANSLATION_LARGE; | |
985 | } else if (!strcmp(value, "rechs")) { | |
986 | translation = BIOS_ATA_TRANSLATION_RECHS; | |
987 | } else if (!strcmp(value, "auto")) { | |
988 | translation = BIOS_ATA_TRANSLATION_AUTO; | |
989 | } else { | |
990 | error_report("'%s' invalid translation type", value); | |
991 | goto fail; | |
992 | } | |
993 | } | |
994 | ||
995 | if (media == MEDIA_CDROM) { | |
996 | if (cyls || secs || heads) { | |
997 | error_report("CHS can't be set with media=cdrom"); | |
998 | goto fail; | |
999 | } | |
1000 | } | |
1001 | ||
1002 | /* Device address specified by bus/unit or index. | |
1003 | * If none was specified, try to find the first free one. */ | |
1004 | bus_id = qemu_opt_get_number(legacy_opts, "bus", 0); | |
1005 | unit_id = qemu_opt_get_number(legacy_opts, "unit", -1); | |
1006 | index = qemu_opt_get_number(legacy_opts, "index", -1); | |
1007 | ||
1008 | max_devs = if_max_devs[type]; | |
1009 | ||
1010 | if (index != -1) { | |
1011 | if (bus_id != 0 || unit_id != -1) { | |
1012 | error_report("index cannot be used with bus and unit"); | |
1013 | goto fail; | |
1014 | } | |
1015 | bus_id = drive_index_to_bus_id(type, index); | |
1016 | unit_id = drive_index_to_unit_id(type, index); | |
1017 | } | |
1018 | ||
1019 | if (unit_id == -1) { | |
1020 | unit_id = 0; | |
1021 | while (drive_get(type, bus_id, unit_id) != NULL) { | |
1022 | unit_id++; | |
1023 | if (max_devs && unit_id >= max_devs) { | |
1024 | unit_id -= max_devs; | |
1025 | bus_id++; | |
1026 | } | |
1027 | } | |
1028 | } | |
1029 | ||
1030 | if (max_devs && unit_id >= max_devs) { | |
1031 | error_report("unit %d too big (max is %d)", unit_id, max_devs - 1); | |
1032 | goto fail; | |
1033 | } | |
1034 | ||
1035 | if (drive_get(type, bus_id, unit_id) != NULL) { | |
1036 | error_report("drive with bus=%d, unit=%d (index=%d) exists", | |
1037 | bus_id, unit_id, index); | |
1038 | goto fail; | |
1039 | } | |
1040 | ||
1041 | /* Serial number */ | |
1042 | serial = qemu_opt_get(legacy_opts, "serial"); | |
1043 | ||
1044 | /* no id supplied -> create one */ | |
1045 | if (qemu_opts_id(all_opts) == NULL) { | |
1046 | char *new_id; | |
1047 | const char *mediastr = ""; | |
1048 | if (type == IF_IDE || type == IF_SCSI) { | |
1049 | mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; | |
1050 | } | |
1051 | if (max_devs) { | |
1052 | new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id, | |
1053 | mediastr, unit_id); | |
1054 | } else { | |
1055 | new_id = g_strdup_printf("%s%s%i", if_name[type], | |
1056 | mediastr, unit_id); | |
1057 | } | |
1058 | qdict_put(bs_opts, "id", qstring_from_str(new_id)); | |
1059 | g_free(new_id); | |
1060 | } | |
1061 | ||
1062 | /* Add virtio block device */ | |
1063 | devaddr = qemu_opt_get(legacy_opts, "addr"); | |
1064 | if (devaddr && type != IF_VIRTIO) { | |
1065 | error_report("addr is not supported by this bus type"); | |
1066 | goto fail; | |
1067 | } | |
1068 | ||
1069 | if (type == IF_VIRTIO) { | |
1070 | QemuOpts *devopts; | |
1071 | devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0, | |
1072 | &error_abort); | |
1073 | if (arch_type == QEMU_ARCH_S390X) { | |
1074 | qemu_opt_set(devopts, "driver", "virtio-blk-ccw", &error_abort); | |
1075 | } else { | |
1076 | qemu_opt_set(devopts, "driver", "virtio-blk-pci", &error_abort); | |
1077 | } | |
1078 | qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"), | |
1079 | &error_abort); | |
1080 | if (devaddr) { | |
1081 | qemu_opt_set(devopts, "addr", devaddr, &error_abort); | |
1082 | } | |
1083 | } | |
1084 | ||
1085 | filename = qemu_opt_get(legacy_opts, "file"); | |
1086 | ||
1087 | /* Check werror/rerror compatibility with if=... */ | |
1088 | werror = qemu_opt_get(legacy_opts, "werror"); | |
1089 | if (werror != NULL) { | |
1090 | if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && | |
1091 | type != IF_NONE) { | |
1092 | error_report("werror is not supported by this bus type"); | |
1093 | goto fail; | |
1094 | } | |
1095 | qdict_put(bs_opts, "werror", qstring_from_str(werror)); | |
1096 | } | |
1097 | ||
1098 | rerror = qemu_opt_get(legacy_opts, "rerror"); | |
1099 | if (rerror != NULL) { | |
1100 | if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && | |
1101 | type != IF_NONE) { | |
1102 | error_report("rerror is not supported by this bus type"); | |
1103 | goto fail; | |
1104 | } | |
1105 | qdict_put(bs_opts, "rerror", qstring_from_str(rerror)); | |
1106 | } | |
1107 | ||
1108 | /* Actual block device init: Functionality shared with blockdev-add */ | |
1109 | blk = blockdev_init(filename, bs_opts, &local_err); | |
1110 | bs_opts = NULL; | |
1111 | if (!blk) { | |
1112 | if (local_err) { | |
1113 | error_report_err(local_err); | |
1114 | } | |
1115 | goto fail; | |
1116 | } else { | |
1117 | assert(!local_err); | |
1118 | } | |
1119 | ||
1120 | /* Create legacy DriveInfo */ | |
1121 | dinfo = g_malloc0(sizeof(*dinfo)); | |
1122 | dinfo->opts = all_opts; | |
1123 | ||
1124 | dinfo->cyls = cyls; | |
1125 | dinfo->heads = heads; | |
1126 | dinfo->secs = secs; | |
1127 | dinfo->trans = translation; | |
1128 | ||
1129 | dinfo->type = type; | |
1130 | dinfo->bus = bus_id; | |
1131 | dinfo->unit = unit_id; | |
1132 | dinfo->devaddr = devaddr; | |
1133 | dinfo->serial = g_strdup(serial); | |
1134 | ||
1135 | blk_set_legacy_dinfo(blk, dinfo); | |
1136 | ||
1137 | switch(type) { | |
1138 | case IF_IDE: | |
1139 | case IF_SCSI: | |
1140 | case IF_XEN: | |
1141 | case IF_NONE: | |
1142 | dinfo->media_cd = media == MEDIA_CDROM; | |
1143 | break; | |
1144 | default: | |
1145 | break; | |
1146 | } | |
1147 | ||
1148 | fail: | |
1149 | qemu_opts_del(legacy_opts); | |
1150 | QDECREF(bs_opts); | |
1151 | return dinfo; | |
1152 | } | |
1153 | ||
1154 | void hmp_commit(Monitor *mon, const QDict *qdict) | |
1155 | { | |
1156 | const char *device = qdict_get_str(qdict, "device"); | |
1157 | BlockBackend *blk; | |
1158 | int ret; | |
1159 | ||
1160 | if (!strcmp(device, "all")) { | |
1161 | ret = bdrv_commit_all(); | |
1162 | } else { | |
1163 | BlockDriverState *bs; | |
1164 | AioContext *aio_context; | |
1165 | ||
1166 | blk = blk_by_name(device); | |
1167 | if (!blk) { | |
1168 | monitor_printf(mon, "Device '%s' not found\n", device); | |
1169 | return; | |
1170 | } | |
1171 | if (!blk_is_available(blk)) { | |
1172 | monitor_printf(mon, "Device '%s' has no medium\n", device); | |
1173 | return; | |
1174 | } | |
1175 | ||
1176 | bs = blk_bs(blk); | |
1177 | aio_context = bdrv_get_aio_context(bs); | |
1178 | aio_context_acquire(aio_context); | |
1179 | ||
1180 | ret = bdrv_commit(bs); | |
1181 | ||
1182 | aio_context_release(aio_context); | |
1183 | } | |
1184 | if (ret < 0) { | |
1185 | monitor_printf(mon, "'commit' error for '%s': %s\n", device, | |
1186 | strerror(-ret)); | |
1187 | } | |
1188 | } | |
1189 | ||
1190 | static void blockdev_do_action(TransactionActionKind type, void *data, | |
1191 | Error **errp) | |
1192 | { | |
1193 | TransactionAction action; | |
1194 | TransactionActionList list; | |
1195 | ||
1196 | action.type = type; | |
1197 | action.u.data = data; | |
1198 | list.value = &action; | |
1199 | list.next = NULL; | |
1200 | qmp_transaction(&list, false, NULL, errp); | |
1201 | } | |
1202 | ||
1203 | void qmp_blockdev_snapshot_sync(bool has_device, const char *device, | |
1204 | bool has_node_name, const char *node_name, | |
1205 | const char *snapshot_file, | |
1206 | bool has_snapshot_node_name, | |
1207 | const char *snapshot_node_name, | |
1208 | bool has_format, const char *format, | |
1209 | bool has_mode, NewImageMode mode, Error **errp) | |
1210 | { | |
1211 | BlockdevSnapshotSync snapshot = { | |
1212 | .has_device = has_device, | |
1213 | .device = (char *) device, | |
1214 | .has_node_name = has_node_name, | |
1215 | .node_name = (char *) node_name, | |
1216 | .snapshot_file = (char *) snapshot_file, | |
1217 | .has_snapshot_node_name = has_snapshot_node_name, | |
1218 | .snapshot_node_name = (char *) snapshot_node_name, | |
1219 | .has_format = has_format, | |
1220 | .format = (char *) format, | |
1221 | .has_mode = has_mode, | |
1222 | .mode = mode, | |
1223 | }; | |
1224 | blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, | |
1225 | &snapshot, errp); | |
1226 | } | |
1227 | ||
1228 | void qmp_blockdev_snapshot(const char *node, const char *overlay, | |
1229 | Error **errp) | |
1230 | { | |
1231 | BlockdevSnapshot snapshot_data = { | |
1232 | .node = (char *) node, | |
1233 | .overlay = (char *) overlay | |
1234 | }; | |
1235 | ||
1236 | blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT, | |
1237 | &snapshot_data, errp); | |
1238 | } | |
1239 | ||
1240 | void qmp_blockdev_snapshot_internal_sync(const char *device, | |
1241 | const char *name, | |
1242 | Error **errp) | |
1243 | { | |
1244 | BlockdevSnapshotInternal snapshot = { | |
1245 | .device = (char *) device, | |
1246 | .name = (char *) name | |
1247 | }; | |
1248 | ||
1249 | blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC, | |
1250 | &snapshot, errp); | |
1251 | } | |
1252 | ||
1253 | SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device, | |
1254 | bool has_id, | |
1255 | const char *id, | |
1256 | bool has_name, | |
1257 | const char *name, | |
1258 | Error **errp) | |
1259 | { | |
1260 | BlockDriverState *bs; | |
1261 | BlockBackend *blk; | |
1262 | AioContext *aio_context; | |
1263 | QEMUSnapshotInfo sn; | |
1264 | Error *local_err = NULL; | |
1265 | SnapshotInfo *info = NULL; | |
1266 | int ret; | |
1267 | ||
1268 | blk = blk_by_name(device); | |
1269 | if (!blk) { | |
1270 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
1271 | "Device '%s' not found", device); | |
1272 | return NULL; | |
1273 | } | |
1274 | ||
1275 | aio_context = blk_get_aio_context(blk); | |
1276 | aio_context_acquire(aio_context); | |
1277 | ||
1278 | if (!has_id) { | |
1279 | id = NULL; | |
1280 | } | |
1281 | ||
1282 | if (!has_name) { | |
1283 | name = NULL; | |
1284 | } | |
1285 | ||
1286 | if (!id && !name) { | |
1287 | error_setg(errp, "Name or id must be provided"); | |
1288 | goto out_aio_context; | |
1289 | } | |
1290 | ||
1291 | if (!blk_is_available(blk)) { | |
1292 | error_setg(errp, "Device '%s' has no medium", device); | |
1293 | goto out_aio_context; | |
1294 | } | |
1295 | bs = blk_bs(blk); | |
1296 | ||
1297 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, errp)) { | |
1298 | goto out_aio_context; | |
1299 | } | |
1300 | ||
1301 | ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err); | |
1302 | if (local_err) { | |
1303 | error_propagate(errp, local_err); | |
1304 | goto out_aio_context; | |
1305 | } | |
1306 | if (!ret) { | |
1307 | error_setg(errp, | |
1308 | "Snapshot with id '%s' and name '%s' does not exist on " | |
1309 | "device '%s'", | |
1310 | STR_OR_NULL(id), STR_OR_NULL(name), device); | |
1311 | goto out_aio_context; | |
1312 | } | |
1313 | ||
1314 | bdrv_snapshot_delete(bs, id, name, &local_err); | |
1315 | if (local_err) { | |
1316 | error_propagate(errp, local_err); | |
1317 | goto out_aio_context; | |
1318 | } | |
1319 | ||
1320 | aio_context_release(aio_context); | |
1321 | ||
1322 | info = g_new0(SnapshotInfo, 1); | |
1323 | info->id = g_strdup(sn.id_str); | |
1324 | info->name = g_strdup(sn.name); | |
1325 | info->date_nsec = sn.date_nsec; | |
1326 | info->date_sec = sn.date_sec; | |
1327 | info->vm_state_size = sn.vm_state_size; | |
1328 | info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000; | |
1329 | info->vm_clock_sec = sn.vm_clock_nsec / 1000000000; | |
1330 | ||
1331 | return info; | |
1332 | ||
1333 | out_aio_context: | |
1334 | aio_context_release(aio_context); | |
1335 | return NULL; | |
1336 | } | |
1337 | ||
1338 | /** | |
1339 | * block_dirty_bitmap_lookup: | |
1340 | * Return a dirty bitmap (if present), after validating | |
1341 | * the node reference and bitmap names. | |
1342 | * | |
1343 | * @node: The name of the BDS node to search for bitmaps | |
1344 | * @name: The name of the bitmap to search for | |
1345 | * @pbs: Output pointer for BDS lookup, if desired. Can be NULL. | |
1346 | * @paio: Output pointer for aio_context acquisition, if desired. Can be NULL. | |
1347 | * @errp: Output pointer for error information. Can be NULL. | |
1348 | * | |
1349 | * @return: A bitmap object on success, or NULL on failure. | |
1350 | */ | |
1351 | static BdrvDirtyBitmap *block_dirty_bitmap_lookup(const char *node, | |
1352 | const char *name, | |
1353 | BlockDriverState **pbs, | |
1354 | AioContext **paio, | |
1355 | Error **errp) | |
1356 | { | |
1357 | BlockDriverState *bs; | |
1358 | BdrvDirtyBitmap *bitmap; | |
1359 | AioContext *aio_context; | |
1360 | ||
1361 | if (!node) { | |
1362 | error_setg(errp, "Node cannot be NULL"); | |
1363 | return NULL; | |
1364 | } | |
1365 | if (!name) { | |
1366 | error_setg(errp, "Bitmap name cannot be NULL"); | |
1367 | return NULL; | |
1368 | } | |
1369 | bs = bdrv_lookup_bs(node, node, NULL); | |
1370 | if (!bs) { | |
1371 | error_setg(errp, "Node '%s' not found", node); | |
1372 | return NULL; | |
1373 | } | |
1374 | ||
1375 | aio_context = bdrv_get_aio_context(bs); | |
1376 | aio_context_acquire(aio_context); | |
1377 | ||
1378 | bitmap = bdrv_find_dirty_bitmap(bs, name); | |
1379 | if (!bitmap) { | |
1380 | error_setg(errp, "Dirty bitmap '%s' not found", name); | |
1381 | goto fail; | |
1382 | } | |
1383 | ||
1384 | if (pbs) { | |
1385 | *pbs = bs; | |
1386 | } | |
1387 | if (paio) { | |
1388 | *paio = aio_context; | |
1389 | } else { | |
1390 | aio_context_release(aio_context); | |
1391 | } | |
1392 | ||
1393 | return bitmap; | |
1394 | ||
1395 | fail: | |
1396 | aio_context_release(aio_context); | |
1397 | return NULL; | |
1398 | } | |
1399 | ||
1400 | /* New and old BlockDriverState structs for atomic group operations */ | |
1401 | ||
1402 | typedef struct BlkActionState BlkActionState; | |
1403 | ||
1404 | /** | |
1405 | * BlkActionOps: | |
1406 | * Table of operations that define an Action. | |
1407 | * | |
1408 | * @instance_size: Size of state struct, in bytes. | |
1409 | * @prepare: Prepare the work, must NOT be NULL. | |
1410 | * @commit: Commit the changes, can be NULL. | |
1411 | * @abort: Abort the changes on fail, can be NULL. | |
1412 | * @clean: Clean up resources after all transaction actions have called | |
1413 | * commit() or abort(). Can be NULL. | |
1414 | * | |
1415 | * Only prepare() may fail. In a single transaction, only one of commit() or | |
1416 | * abort() will be called. clean() will always be called if it is present. | |
1417 | */ | |
1418 | typedef struct BlkActionOps { | |
1419 | size_t instance_size; | |
1420 | void (*prepare)(BlkActionState *common, Error **errp); | |
1421 | void (*commit)(BlkActionState *common); | |
1422 | void (*abort)(BlkActionState *common); | |
1423 | void (*clean)(BlkActionState *common); | |
1424 | } BlkActionOps; | |
1425 | ||
1426 | /** | |
1427 | * BlkActionState: | |
1428 | * Describes one Action's state within a Transaction. | |
1429 | * | |
1430 | * @action: QAPI-defined enum identifying which Action to perform. | |
1431 | * @ops: Table of ActionOps this Action can perform. | |
1432 | * @block_job_txn: Transaction which this action belongs to. | |
1433 | * @entry: List membership for all Actions in this Transaction. | |
1434 | * | |
1435 | * This structure must be arranged as first member in a subclassed type, | |
1436 | * assuming that the compiler will also arrange it to the same offsets as the | |
1437 | * base class. | |
1438 | */ | |
1439 | struct BlkActionState { | |
1440 | TransactionAction *action; | |
1441 | const BlkActionOps *ops; | |
1442 | BlockJobTxn *block_job_txn; | |
1443 | TransactionProperties *txn_props; | |
1444 | QSIMPLEQ_ENTRY(BlkActionState) entry; | |
1445 | }; | |
1446 | ||
1447 | /* internal snapshot private data */ | |
1448 | typedef struct InternalSnapshotState { | |
1449 | BlkActionState common; | |
1450 | BlockDriverState *bs; | |
1451 | AioContext *aio_context; | |
1452 | QEMUSnapshotInfo sn; | |
1453 | bool created; | |
1454 | } InternalSnapshotState; | |
1455 | ||
1456 | ||
1457 | static int action_check_completion_mode(BlkActionState *s, Error **errp) | |
1458 | { | |
1459 | if (s->txn_props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) { | |
1460 | error_setg(errp, | |
1461 | "Action '%s' does not support Transaction property " | |
1462 | "completion-mode = %s", | |
1463 | TransactionActionKind_lookup[s->action->type], | |
1464 | ActionCompletionMode_lookup[s->txn_props->completion_mode]); | |
1465 | return -1; | |
1466 | } | |
1467 | return 0; | |
1468 | } | |
1469 | ||
1470 | static void internal_snapshot_prepare(BlkActionState *common, | |
1471 | Error **errp) | |
1472 | { | |
1473 | Error *local_err = NULL; | |
1474 | const char *device; | |
1475 | const char *name; | |
1476 | BlockBackend *blk; | |
1477 | BlockDriverState *bs; | |
1478 | QEMUSnapshotInfo old_sn, *sn; | |
1479 | bool ret; | |
1480 | qemu_timeval tv; | |
1481 | BlockdevSnapshotInternal *internal; | |
1482 | InternalSnapshotState *state; | |
1483 | int ret1; | |
1484 | ||
1485 | g_assert(common->action->type == | |
1486 | TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC); | |
1487 | internal = common->action->u.blockdev_snapshot_internal_sync; | |
1488 | state = DO_UPCAST(InternalSnapshotState, common, common); | |
1489 | ||
1490 | /* 1. parse input */ | |
1491 | device = internal->device; | |
1492 | name = internal->name; | |
1493 | ||
1494 | /* 2. check for validation */ | |
1495 | if (action_check_completion_mode(common, errp) < 0) { | |
1496 | return; | |
1497 | } | |
1498 | ||
1499 | blk = blk_by_name(device); | |
1500 | if (!blk) { | |
1501 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
1502 | "Device '%s' not found", device); | |
1503 | return; | |
1504 | } | |
1505 | ||
1506 | /* AioContext is released in .clean() */ | |
1507 | state->aio_context = blk_get_aio_context(blk); | |
1508 | aio_context_acquire(state->aio_context); | |
1509 | ||
1510 | if (!blk_is_available(blk)) { | |
1511 | error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
1512 | return; | |
1513 | } | |
1514 | bs = blk_bs(blk); | |
1515 | ||
1516 | state->bs = bs; | |
1517 | bdrv_drained_begin(bs); | |
1518 | ||
1519 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, errp)) { | |
1520 | return; | |
1521 | } | |
1522 | ||
1523 | if (bdrv_is_read_only(bs)) { | |
1524 | error_setg(errp, "Device '%s' is read only", device); | |
1525 | return; | |
1526 | } | |
1527 | ||
1528 | if (!bdrv_can_snapshot(bs)) { | |
1529 | error_setg(errp, "Block format '%s' used by device '%s' " | |
1530 | "does not support internal snapshots", | |
1531 | bs->drv->format_name, device); | |
1532 | return; | |
1533 | } | |
1534 | ||
1535 | if (!strlen(name)) { | |
1536 | error_setg(errp, "Name is empty"); | |
1537 | return; | |
1538 | } | |
1539 | ||
1540 | /* check whether a snapshot with name exist */ | |
1541 | ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn, | |
1542 | &local_err); | |
1543 | if (local_err) { | |
1544 | error_propagate(errp, local_err); | |
1545 | return; | |
1546 | } else if (ret) { | |
1547 | error_setg(errp, | |
1548 | "Snapshot with name '%s' already exists on device '%s'", | |
1549 | name, device); | |
1550 | return; | |
1551 | } | |
1552 | ||
1553 | /* 3. take the snapshot */ | |
1554 | sn = &state->sn; | |
1555 | pstrcpy(sn->name, sizeof(sn->name), name); | |
1556 | qemu_gettimeofday(&tv); | |
1557 | sn->date_sec = tv.tv_sec; | |
1558 | sn->date_nsec = tv.tv_usec * 1000; | |
1559 | sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); | |
1560 | ||
1561 | ret1 = bdrv_snapshot_create(bs, sn); | |
1562 | if (ret1 < 0) { | |
1563 | error_setg_errno(errp, -ret1, | |
1564 | "Failed to create snapshot '%s' on device '%s'", | |
1565 | name, device); | |
1566 | return; | |
1567 | } | |
1568 | ||
1569 | /* 4. succeed, mark a snapshot is created */ | |
1570 | state->created = true; | |
1571 | } | |
1572 | ||
1573 | static void internal_snapshot_abort(BlkActionState *common) | |
1574 | { | |
1575 | InternalSnapshotState *state = | |
1576 | DO_UPCAST(InternalSnapshotState, common, common); | |
1577 | BlockDriverState *bs = state->bs; | |
1578 | QEMUSnapshotInfo *sn = &state->sn; | |
1579 | Error *local_error = NULL; | |
1580 | ||
1581 | if (!state->created) { | |
1582 | return; | |
1583 | } | |
1584 | ||
1585 | if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) { | |
1586 | error_reportf_err(local_error, | |
1587 | "Failed to delete snapshot with id '%s' and " | |
1588 | "name '%s' on device '%s' in abort: ", | |
1589 | sn->id_str, sn->name, | |
1590 | bdrv_get_device_name(bs)); | |
1591 | } | |
1592 | } | |
1593 | ||
1594 | static void internal_snapshot_clean(BlkActionState *common) | |
1595 | { | |
1596 | InternalSnapshotState *state = DO_UPCAST(InternalSnapshotState, | |
1597 | common, common); | |
1598 | ||
1599 | if (state->aio_context) { | |
1600 | if (state->bs) { | |
1601 | bdrv_drained_end(state->bs); | |
1602 | } | |
1603 | aio_context_release(state->aio_context); | |
1604 | } | |
1605 | } | |
1606 | ||
1607 | /* external snapshot private data */ | |
1608 | typedef struct ExternalSnapshotState { | |
1609 | BlkActionState common; | |
1610 | BlockDriverState *old_bs; | |
1611 | BlockDriverState *new_bs; | |
1612 | AioContext *aio_context; | |
1613 | } ExternalSnapshotState; | |
1614 | ||
1615 | static void external_snapshot_prepare(BlkActionState *common, | |
1616 | Error **errp) | |
1617 | { | |
1618 | int flags = 0, ret; | |
1619 | QDict *options = NULL; | |
1620 | Error *local_err = NULL; | |
1621 | /* Device and node name of the image to generate the snapshot from */ | |
1622 | const char *device; | |
1623 | const char *node_name; | |
1624 | /* Reference to the new image (for 'blockdev-snapshot') */ | |
1625 | const char *snapshot_ref; | |
1626 | /* File name of the new image (for 'blockdev-snapshot-sync') */ | |
1627 | const char *new_image_file; | |
1628 | ExternalSnapshotState *state = | |
1629 | DO_UPCAST(ExternalSnapshotState, common, common); | |
1630 | TransactionAction *action = common->action; | |
1631 | ||
1632 | /* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar | |
1633 | * purpose but a different set of parameters */ | |
1634 | switch (action->type) { | |
1635 | case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT: | |
1636 | { | |
1637 | BlockdevSnapshot *s = action->u.blockdev_snapshot; | |
1638 | device = s->node; | |
1639 | node_name = s->node; | |
1640 | new_image_file = NULL; | |
1641 | snapshot_ref = s->overlay; | |
1642 | } | |
1643 | break; | |
1644 | case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC: | |
1645 | { | |
1646 | BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync; | |
1647 | device = s->has_device ? s->device : NULL; | |
1648 | node_name = s->has_node_name ? s->node_name : NULL; | |
1649 | new_image_file = s->snapshot_file; | |
1650 | snapshot_ref = NULL; | |
1651 | } | |
1652 | break; | |
1653 | default: | |
1654 | g_assert_not_reached(); | |
1655 | } | |
1656 | ||
1657 | /* start processing */ | |
1658 | if (action_check_completion_mode(common, errp) < 0) { | |
1659 | return; | |
1660 | } | |
1661 | ||
1662 | state->old_bs = bdrv_lookup_bs(device, node_name, errp); | |
1663 | if (!state->old_bs) { | |
1664 | return; | |
1665 | } | |
1666 | ||
1667 | /* Acquire AioContext now so any threads operating on old_bs stop */ | |
1668 | state->aio_context = bdrv_get_aio_context(state->old_bs); | |
1669 | aio_context_acquire(state->aio_context); | |
1670 | bdrv_drained_begin(state->old_bs); | |
1671 | ||
1672 | if (!bdrv_is_inserted(state->old_bs)) { | |
1673 | error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
1674 | return; | |
1675 | } | |
1676 | ||
1677 | if (bdrv_op_is_blocked(state->old_bs, | |
1678 | BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, errp)) { | |
1679 | return; | |
1680 | } | |
1681 | ||
1682 | if (!bdrv_is_read_only(state->old_bs)) { | |
1683 | if (bdrv_flush(state->old_bs)) { | |
1684 | error_setg(errp, QERR_IO_ERROR); | |
1685 | return; | |
1686 | } | |
1687 | } | |
1688 | ||
1689 | if (!bdrv_is_first_non_filter(state->old_bs)) { | |
1690 | error_setg(errp, QERR_FEATURE_DISABLED, "snapshot"); | |
1691 | return; | |
1692 | } | |
1693 | ||
1694 | if (action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC) { | |
1695 | BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync; | |
1696 | const char *format = s->has_format ? s->format : "qcow2"; | |
1697 | enum NewImageMode mode; | |
1698 | const char *snapshot_node_name = | |
1699 | s->has_snapshot_node_name ? s->snapshot_node_name : NULL; | |
1700 | ||
1701 | if (node_name && !snapshot_node_name) { | |
1702 | error_setg(errp, "New snapshot node name missing"); | |
1703 | return; | |
1704 | } | |
1705 | ||
1706 | if (snapshot_node_name && | |
1707 | bdrv_lookup_bs(snapshot_node_name, snapshot_node_name, NULL)) { | |
1708 | error_setg(errp, "New snapshot node name already in use"); | |
1709 | return; | |
1710 | } | |
1711 | ||
1712 | flags = state->old_bs->open_flags; | |
1713 | ||
1714 | /* create new image w/backing file */ | |
1715 | mode = s->has_mode ? s->mode : NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
1716 | if (mode != NEW_IMAGE_MODE_EXISTING) { | |
1717 | bdrv_img_create(new_image_file, format, | |
1718 | state->old_bs->filename, | |
1719 | state->old_bs->drv->format_name, | |
1720 | NULL, -1, flags, &local_err, false); | |
1721 | if (local_err) { | |
1722 | error_propagate(errp, local_err); | |
1723 | return; | |
1724 | } | |
1725 | } | |
1726 | ||
1727 | options = qdict_new(); | |
1728 | if (s->has_snapshot_node_name) { | |
1729 | qdict_put(options, "node-name", | |
1730 | qstring_from_str(snapshot_node_name)); | |
1731 | } | |
1732 | qdict_put(options, "driver", qstring_from_str(format)); | |
1733 | ||
1734 | flags |= BDRV_O_NO_BACKING; | |
1735 | } | |
1736 | ||
1737 | assert(state->new_bs == NULL); | |
1738 | ret = bdrv_open(&state->new_bs, new_image_file, snapshot_ref, options, | |
1739 | flags, errp); | |
1740 | /* We will manually add the backing_hd field to the bs later */ | |
1741 | if (ret != 0) { | |
1742 | return; | |
1743 | } | |
1744 | ||
1745 | if (state->new_bs->blk != NULL) { | |
1746 | error_setg(errp, "The snapshot is already in use by %s", | |
1747 | blk_name(state->new_bs->blk)); | |
1748 | return; | |
1749 | } | |
1750 | ||
1751 | if (bdrv_op_is_blocked(state->new_bs, BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, | |
1752 | errp)) { | |
1753 | return; | |
1754 | } | |
1755 | ||
1756 | if (state->new_bs->backing != NULL) { | |
1757 | error_setg(errp, "The snapshot already has a backing image"); | |
1758 | return; | |
1759 | } | |
1760 | ||
1761 | if (!state->new_bs->drv->supports_backing) { | |
1762 | error_setg(errp, "The snapshot does not support backing images"); | |
1763 | } | |
1764 | } | |
1765 | ||
1766 | static void external_snapshot_commit(BlkActionState *common) | |
1767 | { | |
1768 | ExternalSnapshotState *state = | |
1769 | DO_UPCAST(ExternalSnapshotState, common, common); | |
1770 | ||
1771 | bdrv_set_aio_context(state->new_bs, state->aio_context); | |
1772 | ||
1773 | /* This removes our old bs and adds the new bs */ | |
1774 | bdrv_append(state->new_bs, state->old_bs); | |
1775 | /* We don't need (or want) to use the transactional | |
1776 | * bdrv_reopen_multiple() across all the entries at once, because we | |
1777 | * don't want to abort all of them if one of them fails the reopen */ | |
1778 | bdrv_reopen(state->old_bs, state->old_bs->open_flags & ~BDRV_O_RDWR, | |
1779 | NULL); | |
1780 | } | |
1781 | ||
1782 | static void external_snapshot_abort(BlkActionState *common) | |
1783 | { | |
1784 | ExternalSnapshotState *state = | |
1785 | DO_UPCAST(ExternalSnapshotState, common, common); | |
1786 | if (state->new_bs) { | |
1787 | bdrv_unref(state->new_bs); | |
1788 | } | |
1789 | } | |
1790 | ||
1791 | static void external_snapshot_clean(BlkActionState *common) | |
1792 | { | |
1793 | ExternalSnapshotState *state = | |
1794 | DO_UPCAST(ExternalSnapshotState, common, common); | |
1795 | if (state->aio_context) { | |
1796 | bdrv_drained_end(state->old_bs); | |
1797 | aio_context_release(state->aio_context); | |
1798 | } | |
1799 | } | |
1800 | ||
1801 | typedef struct DriveBackupState { | |
1802 | BlkActionState common; | |
1803 | BlockDriverState *bs; | |
1804 | AioContext *aio_context; | |
1805 | BlockJob *job; | |
1806 | } DriveBackupState; | |
1807 | ||
1808 | static void do_drive_backup(const char *device, const char *target, | |
1809 | bool has_format, const char *format, | |
1810 | enum MirrorSyncMode sync, | |
1811 | bool has_mode, enum NewImageMode mode, | |
1812 | bool has_speed, int64_t speed, | |
1813 | bool has_bitmap, const char *bitmap, | |
1814 | bool has_on_source_error, | |
1815 | BlockdevOnError on_source_error, | |
1816 | bool has_on_target_error, | |
1817 | BlockdevOnError on_target_error, | |
1818 | BlockJobTxn *txn, Error **errp); | |
1819 | ||
1820 | static void drive_backup_prepare(BlkActionState *common, Error **errp) | |
1821 | { | |
1822 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
1823 | BlockBackend *blk; | |
1824 | DriveBackup *backup; | |
1825 | Error *local_err = NULL; | |
1826 | ||
1827 | assert(common->action->type == TRANSACTION_ACTION_KIND_DRIVE_BACKUP); | |
1828 | backup = common->action->u.drive_backup; | |
1829 | ||
1830 | blk = blk_by_name(backup->device); | |
1831 | if (!blk) { | |
1832 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
1833 | "Device '%s' not found", backup->device); | |
1834 | return; | |
1835 | } | |
1836 | ||
1837 | if (!blk_is_available(blk)) { | |
1838 | error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, backup->device); | |
1839 | return; | |
1840 | } | |
1841 | ||
1842 | /* AioContext is released in .clean() */ | |
1843 | state->aio_context = blk_get_aio_context(blk); | |
1844 | aio_context_acquire(state->aio_context); | |
1845 | bdrv_drained_begin(blk_bs(blk)); | |
1846 | state->bs = blk_bs(blk); | |
1847 | ||
1848 | do_drive_backup(backup->device, backup->target, | |
1849 | backup->has_format, backup->format, | |
1850 | backup->sync, | |
1851 | backup->has_mode, backup->mode, | |
1852 | backup->has_speed, backup->speed, | |
1853 | backup->has_bitmap, backup->bitmap, | |
1854 | backup->has_on_source_error, backup->on_source_error, | |
1855 | backup->has_on_target_error, backup->on_target_error, | |
1856 | common->block_job_txn, &local_err); | |
1857 | if (local_err) { | |
1858 | error_propagate(errp, local_err); | |
1859 | return; | |
1860 | } | |
1861 | ||
1862 | state->job = state->bs->job; | |
1863 | } | |
1864 | ||
1865 | static void drive_backup_abort(BlkActionState *common) | |
1866 | { | |
1867 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
1868 | BlockDriverState *bs = state->bs; | |
1869 | ||
1870 | /* Only cancel if it's the job we started */ | |
1871 | if (bs && bs->job && bs->job == state->job) { | |
1872 | block_job_cancel_sync(bs->job); | |
1873 | } | |
1874 | } | |
1875 | ||
1876 | static void drive_backup_clean(BlkActionState *common) | |
1877 | { | |
1878 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
1879 | ||
1880 | if (state->aio_context) { | |
1881 | bdrv_drained_end(state->bs); | |
1882 | aio_context_release(state->aio_context); | |
1883 | } | |
1884 | } | |
1885 | ||
1886 | typedef struct BlockdevBackupState { | |
1887 | BlkActionState common; | |
1888 | BlockDriverState *bs; | |
1889 | BlockJob *job; | |
1890 | AioContext *aio_context; | |
1891 | } BlockdevBackupState; | |
1892 | ||
1893 | static void do_blockdev_backup(const char *device, const char *target, | |
1894 | enum MirrorSyncMode sync, | |
1895 | bool has_speed, int64_t speed, | |
1896 | bool has_on_source_error, | |
1897 | BlockdevOnError on_source_error, | |
1898 | bool has_on_target_error, | |
1899 | BlockdevOnError on_target_error, | |
1900 | BlockJobTxn *txn, Error **errp); | |
1901 | ||
1902 | static void blockdev_backup_prepare(BlkActionState *common, Error **errp) | |
1903 | { | |
1904 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); | |
1905 | BlockdevBackup *backup; | |
1906 | BlockBackend *blk, *target; | |
1907 | Error *local_err = NULL; | |
1908 | ||
1909 | assert(common->action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP); | |
1910 | backup = common->action->u.blockdev_backup; | |
1911 | ||
1912 | blk = blk_by_name(backup->device); | |
1913 | if (!blk) { | |
1914 | error_setg(errp, "Device '%s' not found", backup->device); | |
1915 | return; | |
1916 | } | |
1917 | ||
1918 | if (!blk_is_available(blk)) { | |
1919 | error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, backup->device); | |
1920 | return; | |
1921 | } | |
1922 | ||
1923 | target = blk_by_name(backup->target); | |
1924 | if (!target) { | |
1925 | error_setg(errp, "Device '%s' not found", backup->target); | |
1926 | return; | |
1927 | } | |
1928 | ||
1929 | /* AioContext is released in .clean() */ | |
1930 | state->aio_context = blk_get_aio_context(blk); | |
1931 | if (state->aio_context != blk_get_aio_context(target)) { | |
1932 | state->aio_context = NULL; | |
1933 | error_setg(errp, "Backup between two IO threads is not implemented"); | |
1934 | return; | |
1935 | } | |
1936 | aio_context_acquire(state->aio_context); | |
1937 | state->bs = blk_bs(blk); | |
1938 | bdrv_drained_begin(state->bs); | |
1939 | ||
1940 | do_blockdev_backup(backup->device, backup->target, | |
1941 | backup->sync, | |
1942 | backup->has_speed, backup->speed, | |
1943 | backup->has_on_source_error, backup->on_source_error, | |
1944 | backup->has_on_target_error, backup->on_target_error, | |
1945 | common->block_job_txn, &local_err); | |
1946 | if (local_err) { | |
1947 | error_propagate(errp, local_err); | |
1948 | return; | |
1949 | } | |
1950 | ||
1951 | state->job = state->bs->job; | |
1952 | } | |
1953 | ||
1954 | static void blockdev_backup_abort(BlkActionState *common) | |
1955 | { | |
1956 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); | |
1957 | BlockDriverState *bs = state->bs; | |
1958 | ||
1959 | /* Only cancel if it's the job we started */ | |
1960 | if (bs && bs->job && bs->job == state->job) { | |
1961 | block_job_cancel_sync(bs->job); | |
1962 | } | |
1963 | } | |
1964 | ||
1965 | static void blockdev_backup_clean(BlkActionState *common) | |
1966 | { | |
1967 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); | |
1968 | ||
1969 | if (state->aio_context) { | |
1970 | bdrv_drained_end(state->bs); | |
1971 | aio_context_release(state->aio_context); | |
1972 | } | |
1973 | } | |
1974 | ||
1975 | typedef struct BlockDirtyBitmapState { | |
1976 | BlkActionState common; | |
1977 | BdrvDirtyBitmap *bitmap; | |
1978 | BlockDriverState *bs; | |
1979 | AioContext *aio_context; | |
1980 | HBitmap *backup; | |
1981 | bool prepared; | |
1982 | } BlockDirtyBitmapState; | |
1983 | ||
1984 | static void block_dirty_bitmap_add_prepare(BlkActionState *common, | |
1985 | Error **errp) | |
1986 | { | |
1987 | Error *local_err = NULL; | |
1988 | BlockDirtyBitmapAdd *action; | |
1989 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
1990 | common, common); | |
1991 | ||
1992 | if (action_check_completion_mode(common, errp) < 0) { | |
1993 | return; | |
1994 | } | |
1995 | ||
1996 | action = common->action->u.block_dirty_bitmap_add; | |
1997 | /* AIO context taken and released within qmp_block_dirty_bitmap_add */ | |
1998 | qmp_block_dirty_bitmap_add(action->node, action->name, | |
1999 | action->has_granularity, action->granularity, | |
2000 | &local_err); | |
2001 | ||
2002 | if (!local_err) { | |
2003 | state->prepared = true; | |
2004 | } else { | |
2005 | error_propagate(errp, local_err); | |
2006 | } | |
2007 | } | |
2008 | ||
2009 | static void block_dirty_bitmap_add_abort(BlkActionState *common) | |
2010 | { | |
2011 | BlockDirtyBitmapAdd *action; | |
2012 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2013 | common, common); | |
2014 | ||
2015 | action = common->action->u.block_dirty_bitmap_add; | |
2016 | /* Should not be able to fail: IF the bitmap was added via .prepare(), | |
2017 | * then the node reference and bitmap name must have been valid. | |
2018 | */ | |
2019 | if (state->prepared) { | |
2020 | qmp_block_dirty_bitmap_remove(action->node, action->name, &error_abort); | |
2021 | } | |
2022 | } | |
2023 | ||
2024 | static void block_dirty_bitmap_clear_prepare(BlkActionState *common, | |
2025 | Error **errp) | |
2026 | { | |
2027 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2028 | common, common); | |
2029 | BlockDirtyBitmap *action; | |
2030 | ||
2031 | if (action_check_completion_mode(common, errp) < 0) { | |
2032 | return; | |
2033 | } | |
2034 | ||
2035 | action = common->action->u.block_dirty_bitmap_clear; | |
2036 | state->bitmap = block_dirty_bitmap_lookup(action->node, | |
2037 | action->name, | |
2038 | &state->bs, | |
2039 | &state->aio_context, | |
2040 | errp); | |
2041 | if (!state->bitmap) { | |
2042 | return; | |
2043 | } | |
2044 | ||
2045 | if (bdrv_dirty_bitmap_frozen(state->bitmap)) { | |
2046 | error_setg(errp, "Cannot modify a frozen bitmap"); | |
2047 | return; | |
2048 | } else if (!bdrv_dirty_bitmap_enabled(state->bitmap)) { | |
2049 | error_setg(errp, "Cannot clear a disabled bitmap"); | |
2050 | return; | |
2051 | } | |
2052 | ||
2053 | bdrv_clear_dirty_bitmap(state->bitmap, &state->backup); | |
2054 | /* AioContext is released in .clean() */ | |
2055 | } | |
2056 | ||
2057 | static void block_dirty_bitmap_clear_abort(BlkActionState *common) | |
2058 | { | |
2059 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2060 | common, common); | |
2061 | ||
2062 | bdrv_undo_clear_dirty_bitmap(state->bitmap, state->backup); | |
2063 | } | |
2064 | ||
2065 | static void block_dirty_bitmap_clear_commit(BlkActionState *common) | |
2066 | { | |
2067 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2068 | common, common); | |
2069 | ||
2070 | hbitmap_free(state->backup); | |
2071 | } | |
2072 | ||
2073 | static void block_dirty_bitmap_clear_clean(BlkActionState *common) | |
2074 | { | |
2075 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2076 | common, common); | |
2077 | ||
2078 | if (state->aio_context) { | |
2079 | aio_context_release(state->aio_context); | |
2080 | } | |
2081 | } | |
2082 | ||
2083 | static void abort_prepare(BlkActionState *common, Error **errp) | |
2084 | { | |
2085 | error_setg(errp, "Transaction aborted using Abort action"); | |
2086 | } | |
2087 | ||
2088 | static void abort_commit(BlkActionState *common) | |
2089 | { | |
2090 | g_assert_not_reached(); /* this action never succeeds */ | |
2091 | } | |
2092 | ||
2093 | static const BlkActionOps actions[] = { | |
2094 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT] = { | |
2095 | .instance_size = sizeof(ExternalSnapshotState), | |
2096 | .prepare = external_snapshot_prepare, | |
2097 | .commit = external_snapshot_commit, | |
2098 | .abort = external_snapshot_abort, | |
2099 | .clean = external_snapshot_clean, | |
2100 | }, | |
2101 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = { | |
2102 | .instance_size = sizeof(ExternalSnapshotState), | |
2103 | .prepare = external_snapshot_prepare, | |
2104 | .commit = external_snapshot_commit, | |
2105 | .abort = external_snapshot_abort, | |
2106 | .clean = external_snapshot_clean, | |
2107 | }, | |
2108 | [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = { | |
2109 | .instance_size = sizeof(DriveBackupState), | |
2110 | .prepare = drive_backup_prepare, | |
2111 | .abort = drive_backup_abort, | |
2112 | .clean = drive_backup_clean, | |
2113 | }, | |
2114 | [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP] = { | |
2115 | .instance_size = sizeof(BlockdevBackupState), | |
2116 | .prepare = blockdev_backup_prepare, | |
2117 | .abort = blockdev_backup_abort, | |
2118 | .clean = blockdev_backup_clean, | |
2119 | }, | |
2120 | [TRANSACTION_ACTION_KIND_ABORT] = { | |
2121 | .instance_size = sizeof(BlkActionState), | |
2122 | .prepare = abort_prepare, | |
2123 | .commit = abort_commit, | |
2124 | }, | |
2125 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = { | |
2126 | .instance_size = sizeof(InternalSnapshotState), | |
2127 | .prepare = internal_snapshot_prepare, | |
2128 | .abort = internal_snapshot_abort, | |
2129 | .clean = internal_snapshot_clean, | |
2130 | }, | |
2131 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD] = { | |
2132 | .instance_size = sizeof(BlockDirtyBitmapState), | |
2133 | .prepare = block_dirty_bitmap_add_prepare, | |
2134 | .abort = block_dirty_bitmap_add_abort, | |
2135 | }, | |
2136 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR] = { | |
2137 | .instance_size = sizeof(BlockDirtyBitmapState), | |
2138 | .prepare = block_dirty_bitmap_clear_prepare, | |
2139 | .commit = block_dirty_bitmap_clear_commit, | |
2140 | .abort = block_dirty_bitmap_clear_abort, | |
2141 | .clean = block_dirty_bitmap_clear_clean, | |
2142 | } | |
2143 | }; | |
2144 | ||
2145 | /** | |
2146 | * Allocate a TransactionProperties structure if necessary, and fill | |
2147 | * that structure with desired defaults if they are unset. | |
2148 | */ | |
2149 | static TransactionProperties *get_transaction_properties( | |
2150 | TransactionProperties *props) | |
2151 | { | |
2152 | if (!props) { | |
2153 | props = g_new0(TransactionProperties, 1); | |
2154 | } | |
2155 | ||
2156 | if (!props->has_completion_mode) { | |
2157 | props->has_completion_mode = true; | |
2158 | props->completion_mode = ACTION_COMPLETION_MODE_INDIVIDUAL; | |
2159 | } | |
2160 | ||
2161 | return props; | |
2162 | } | |
2163 | ||
2164 | /* | |
2165 | * 'Atomic' group operations. The operations are performed as a set, and if | |
2166 | * any fail then we roll back all operations in the group. | |
2167 | */ | |
2168 | void qmp_transaction(TransactionActionList *dev_list, | |
2169 | bool has_props, | |
2170 | struct TransactionProperties *props, | |
2171 | Error **errp) | |
2172 | { | |
2173 | TransactionActionList *dev_entry = dev_list; | |
2174 | BlockJobTxn *block_job_txn = NULL; | |
2175 | BlkActionState *state, *next; | |
2176 | Error *local_err = NULL; | |
2177 | ||
2178 | QSIMPLEQ_HEAD(snap_bdrv_states, BlkActionState) snap_bdrv_states; | |
2179 | QSIMPLEQ_INIT(&snap_bdrv_states); | |
2180 | ||
2181 | /* Does this transaction get canceled as a group on failure? | |
2182 | * If not, we don't really need to make a BlockJobTxn. | |
2183 | */ | |
2184 | props = get_transaction_properties(props); | |
2185 | if (props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) { | |
2186 | block_job_txn = block_job_txn_new(); | |
2187 | } | |
2188 | ||
2189 | /* drain all i/o before any operations */ | |
2190 | bdrv_drain_all(); | |
2191 | ||
2192 | /* We don't do anything in this loop that commits us to the operations */ | |
2193 | while (NULL != dev_entry) { | |
2194 | TransactionAction *dev_info = NULL; | |
2195 | const BlkActionOps *ops; | |
2196 | ||
2197 | dev_info = dev_entry->value; | |
2198 | dev_entry = dev_entry->next; | |
2199 | ||
2200 | assert(dev_info->type < ARRAY_SIZE(actions)); | |
2201 | ||
2202 | ops = &actions[dev_info->type]; | |
2203 | assert(ops->instance_size > 0); | |
2204 | ||
2205 | state = g_malloc0(ops->instance_size); | |
2206 | state->ops = ops; | |
2207 | state->action = dev_info; | |
2208 | state->block_job_txn = block_job_txn; | |
2209 | state->txn_props = props; | |
2210 | QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry); | |
2211 | ||
2212 | state->ops->prepare(state, &local_err); | |
2213 | if (local_err) { | |
2214 | error_propagate(errp, local_err); | |
2215 | goto delete_and_fail; | |
2216 | } | |
2217 | } | |
2218 | ||
2219 | QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) { | |
2220 | if (state->ops->commit) { | |
2221 | state->ops->commit(state); | |
2222 | } | |
2223 | } | |
2224 | ||
2225 | /* success */ | |
2226 | goto exit; | |
2227 | ||
2228 | delete_and_fail: | |
2229 | /* failure, and it is all-or-none; roll back all operations */ | |
2230 | QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) { | |
2231 | if (state->ops->abort) { | |
2232 | state->ops->abort(state); | |
2233 | } | |
2234 | } | |
2235 | exit: | |
2236 | QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) { | |
2237 | if (state->ops->clean) { | |
2238 | state->ops->clean(state); | |
2239 | } | |
2240 | g_free(state); | |
2241 | } | |
2242 | if (!has_props) { | |
2243 | qapi_free_TransactionProperties(props); | |
2244 | } | |
2245 | block_job_txn_unref(block_job_txn); | |
2246 | } | |
2247 | ||
2248 | void qmp_eject(const char *device, bool has_force, bool force, Error **errp) | |
2249 | { | |
2250 | Error *local_err = NULL; | |
2251 | ||
2252 | qmp_blockdev_open_tray(device, has_force, force, &local_err); | |
2253 | if (local_err) { | |
2254 | error_propagate(errp, local_err); | |
2255 | return; | |
2256 | } | |
2257 | ||
2258 | qmp_x_blockdev_remove_medium(device, errp); | |
2259 | } | |
2260 | ||
2261 | void qmp_block_passwd(bool has_device, const char *device, | |
2262 | bool has_node_name, const char *node_name, | |
2263 | const char *password, Error **errp) | |
2264 | { | |
2265 | Error *local_err = NULL; | |
2266 | BlockDriverState *bs; | |
2267 | AioContext *aio_context; | |
2268 | ||
2269 | bs = bdrv_lookup_bs(has_device ? device : NULL, | |
2270 | has_node_name ? node_name : NULL, | |
2271 | &local_err); | |
2272 | if (local_err) { | |
2273 | error_propagate(errp, local_err); | |
2274 | return; | |
2275 | } | |
2276 | ||
2277 | aio_context = bdrv_get_aio_context(bs); | |
2278 | aio_context_acquire(aio_context); | |
2279 | ||
2280 | bdrv_add_key(bs, password, errp); | |
2281 | ||
2282 | aio_context_release(aio_context); | |
2283 | } | |
2284 | ||
2285 | void qmp_blockdev_open_tray(const char *device, bool has_force, bool force, | |
2286 | Error **errp) | |
2287 | { | |
2288 | BlockBackend *blk; | |
2289 | bool locked; | |
2290 | ||
2291 | if (!has_force) { | |
2292 | force = false; | |
2293 | } | |
2294 | ||
2295 | blk = blk_by_name(device); | |
2296 | if (!blk) { | |
2297 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
2298 | "Device '%s' not found", device); | |
2299 | return; | |
2300 | } | |
2301 | ||
2302 | if (!blk_dev_has_removable_media(blk)) { | |
2303 | error_setg(errp, "Device '%s' is not removable", device); | |
2304 | return; | |
2305 | } | |
2306 | ||
2307 | if (!blk_dev_has_tray(blk)) { | |
2308 | /* Ignore this command on tray-less devices */ | |
2309 | return; | |
2310 | } | |
2311 | ||
2312 | if (blk_dev_is_tray_open(blk)) { | |
2313 | return; | |
2314 | } | |
2315 | ||
2316 | locked = blk_dev_is_medium_locked(blk); | |
2317 | if (locked) { | |
2318 | blk_dev_eject_request(blk, force); | |
2319 | } | |
2320 | ||
2321 | if (!locked || force) { | |
2322 | blk_dev_change_media_cb(blk, false); | |
2323 | } | |
2324 | } | |
2325 | ||
2326 | void qmp_blockdev_close_tray(const char *device, Error **errp) | |
2327 | { | |
2328 | BlockBackend *blk; | |
2329 | ||
2330 | blk = blk_by_name(device); | |
2331 | if (!blk) { | |
2332 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
2333 | "Device '%s' not found", device); | |
2334 | return; | |
2335 | } | |
2336 | ||
2337 | if (!blk_dev_has_removable_media(blk)) { | |
2338 | error_setg(errp, "Device '%s' is not removable", device); | |
2339 | return; | |
2340 | } | |
2341 | ||
2342 | if (!blk_dev_has_tray(blk)) { | |
2343 | /* Ignore this command on tray-less devices */ | |
2344 | return; | |
2345 | } | |
2346 | ||
2347 | if (!blk_dev_is_tray_open(blk)) { | |
2348 | return; | |
2349 | } | |
2350 | ||
2351 | blk_dev_change_media_cb(blk, true); | |
2352 | } | |
2353 | ||
2354 | void qmp_x_blockdev_remove_medium(const char *device, Error **errp) | |
2355 | { | |
2356 | BlockBackend *blk; | |
2357 | BlockDriverState *bs; | |
2358 | AioContext *aio_context; | |
2359 | bool has_device; | |
2360 | ||
2361 | blk = blk_by_name(device); | |
2362 | if (!blk) { | |
2363 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
2364 | "Device '%s' not found", device); | |
2365 | return; | |
2366 | } | |
2367 | ||
2368 | /* For BBs without a device, we can exchange the BDS tree at will */ | |
2369 | has_device = blk_get_attached_dev(blk); | |
2370 | ||
2371 | if (has_device && !blk_dev_has_removable_media(blk)) { | |
2372 | error_setg(errp, "Device '%s' is not removable", device); | |
2373 | return; | |
2374 | } | |
2375 | ||
2376 | if (has_device && blk_dev_has_tray(blk) && !blk_dev_is_tray_open(blk)) { | |
2377 | error_setg(errp, "Tray of device '%s' is not open", device); | |
2378 | return; | |
2379 | } | |
2380 | ||
2381 | bs = blk_bs(blk); | |
2382 | if (!bs) { | |
2383 | return; | |
2384 | } | |
2385 | ||
2386 | aio_context = bdrv_get_aio_context(bs); | |
2387 | aio_context_acquire(aio_context); | |
2388 | ||
2389 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_EJECT, errp)) { | |
2390 | goto out; | |
2391 | } | |
2392 | ||
2393 | /* This follows the convention established by bdrv_make_anon() */ | |
2394 | if (bs->device_list.tqe_prev) { | |
2395 | QTAILQ_REMOVE(&bdrv_states, bs, device_list); | |
2396 | bs->device_list.tqe_prev = NULL; | |
2397 | } | |
2398 | ||
2399 | blk_remove_bs(blk); | |
2400 | ||
2401 | if (!blk_dev_has_tray(blk)) { | |
2402 | /* For tray-less devices, blockdev-open-tray is a no-op (or may not be | |
2403 | * called at all); therefore, the medium needs to be ejected here. | |
2404 | * Do it after blk_remove_bs() so blk_is_inserted(blk) returns the @load | |
2405 | * value passed here (i.e. false). */ | |
2406 | blk_dev_change_media_cb(blk, false); | |
2407 | } | |
2408 | ||
2409 | out: | |
2410 | aio_context_release(aio_context); | |
2411 | } | |
2412 | ||
2413 | static void qmp_blockdev_insert_anon_medium(const char *device, | |
2414 | BlockDriverState *bs, Error **errp) | |
2415 | { | |
2416 | BlockBackend *blk; | |
2417 | bool has_device; | |
2418 | ||
2419 | blk = blk_by_name(device); | |
2420 | if (!blk) { | |
2421 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
2422 | "Device '%s' not found", device); | |
2423 | return; | |
2424 | } | |
2425 | ||
2426 | /* For BBs without a device, we can exchange the BDS tree at will */ | |
2427 | has_device = blk_get_attached_dev(blk); | |
2428 | ||
2429 | if (has_device && !blk_dev_has_removable_media(blk)) { | |
2430 | error_setg(errp, "Device '%s' is not removable", device); | |
2431 | return; | |
2432 | } | |
2433 | ||
2434 | if (has_device && blk_dev_has_tray(blk) && !blk_dev_is_tray_open(blk)) { | |
2435 | error_setg(errp, "Tray of device '%s' is not open", device); | |
2436 | return; | |
2437 | } | |
2438 | ||
2439 | if (blk_bs(blk)) { | |
2440 | error_setg(errp, "There already is a medium in device '%s'", device); | |
2441 | return; | |
2442 | } | |
2443 | ||
2444 | blk_insert_bs(blk, bs); | |
2445 | ||
2446 | QTAILQ_INSERT_TAIL(&bdrv_states, bs, device_list); | |
2447 | ||
2448 | if (!blk_dev_has_tray(blk)) { | |
2449 | /* For tray-less devices, blockdev-close-tray is a no-op (or may not be | |
2450 | * called at all); therefore, the medium needs to be pushed into the | |
2451 | * slot here. | |
2452 | * Do it after blk_insert_bs() so blk_is_inserted(blk) returns the @load | |
2453 | * value passed here (i.e. true). */ | |
2454 | blk_dev_change_media_cb(blk, true); | |
2455 | } | |
2456 | } | |
2457 | ||
2458 | void qmp_x_blockdev_insert_medium(const char *device, const char *node_name, | |
2459 | Error **errp) | |
2460 | { | |
2461 | BlockDriverState *bs; | |
2462 | ||
2463 | bs = bdrv_find_node(node_name); | |
2464 | if (!bs) { | |
2465 | error_setg(errp, "Node '%s' not found", node_name); | |
2466 | return; | |
2467 | } | |
2468 | ||
2469 | if (bs->blk) { | |
2470 | error_setg(errp, "Node '%s' is already in use by '%s'", node_name, | |
2471 | blk_name(bs->blk)); | |
2472 | return; | |
2473 | } | |
2474 | ||
2475 | qmp_blockdev_insert_anon_medium(device, bs, errp); | |
2476 | } | |
2477 | ||
2478 | void qmp_blockdev_change_medium(const char *device, const char *filename, | |
2479 | bool has_format, const char *format, | |
2480 | bool has_read_only, | |
2481 | BlockdevChangeReadOnlyMode read_only, | |
2482 | Error **errp) | |
2483 | { | |
2484 | BlockBackend *blk; | |
2485 | BlockDriverState *medium_bs = NULL; | |
2486 | int bdrv_flags, ret; | |
2487 | QDict *options = NULL; | |
2488 | Error *err = NULL; | |
2489 | ||
2490 | blk = blk_by_name(device); | |
2491 | if (!blk) { | |
2492 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
2493 | "Device '%s' not found", device); | |
2494 | goto fail; | |
2495 | } | |
2496 | ||
2497 | if (blk_bs(blk)) { | |
2498 | blk_update_root_state(blk); | |
2499 | } | |
2500 | ||
2501 | bdrv_flags = blk_get_open_flags_from_root_state(blk); | |
2502 | ||
2503 | if (!has_read_only) { | |
2504 | read_only = BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN; | |
2505 | } | |
2506 | ||
2507 | switch (read_only) { | |
2508 | case BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN: | |
2509 | break; | |
2510 | ||
2511 | case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_ONLY: | |
2512 | bdrv_flags &= ~BDRV_O_RDWR; | |
2513 | break; | |
2514 | ||
2515 | case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_WRITE: | |
2516 | bdrv_flags |= BDRV_O_RDWR; | |
2517 | break; | |
2518 | ||
2519 | default: | |
2520 | abort(); | |
2521 | } | |
2522 | ||
2523 | if (has_format) { | |
2524 | options = qdict_new(); | |
2525 | qdict_put(options, "driver", qstring_from_str(format)); | |
2526 | } | |
2527 | ||
2528 | assert(!medium_bs); | |
2529 | ret = bdrv_open(&medium_bs, filename, NULL, options, bdrv_flags, errp); | |
2530 | if (ret < 0) { | |
2531 | goto fail; | |
2532 | } | |
2533 | ||
2534 | blk_apply_root_state(blk, medium_bs); | |
2535 | ||
2536 | bdrv_add_key(medium_bs, NULL, &err); | |
2537 | if (err) { | |
2538 | error_propagate(errp, err); | |
2539 | goto fail; | |
2540 | } | |
2541 | ||
2542 | qmp_blockdev_open_tray(device, false, false, &err); | |
2543 | if (err) { | |
2544 | error_propagate(errp, err); | |
2545 | goto fail; | |
2546 | } | |
2547 | ||
2548 | qmp_x_blockdev_remove_medium(device, &err); | |
2549 | if (err) { | |
2550 | error_propagate(errp, err); | |
2551 | goto fail; | |
2552 | } | |
2553 | ||
2554 | qmp_blockdev_insert_anon_medium(device, medium_bs, &err); | |
2555 | if (err) { | |
2556 | error_propagate(errp, err); | |
2557 | goto fail; | |
2558 | } | |
2559 | ||
2560 | qmp_blockdev_close_tray(device, errp); | |
2561 | ||
2562 | fail: | |
2563 | /* If the medium has been inserted, the device has its own reference, so | |
2564 | * ours must be relinquished; and if it has not been inserted successfully, | |
2565 | * the reference must be relinquished anyway */ | |
2566 | bdrv_unref(medium_bs); | |
2567 | } | |
2568 | ||
2569 | /* throttling disk I/O limits */ | |
2570 | void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd, | |
2571 | int64_t bps_wr, | |
2572 | int64_t iops, | |
2573 | int64_t iops_rd, | |
2574 | int64_t iops_wr, | |
2575 | bool has_bps_max, | |
2576 | int64_t bps_max, | |
2577 | bool has_bps_rd_max, | |
2578 | int64_t bps_rd_max, | |
2579 | bool has_bps_wr_max, | |
2580 | int64_t bps_wr_max, | |
2581 | bool has_iops_max, | |
2582 | int64_t iops_max, | |
2583 | bool has_iops_rd_max, | |
2584 | int64_t iops_rd_max, | |
2585 | bool has_iops_wr_max, | |
2586 | int64_t iops_wr_max, | |
2587 | bool has_iops_size, | |
2588 | int64_t iops_size, | |
2589 | bool has_group, | |
2590 | const char *group, Error **errp) | |
2591 | { | |
2592 | ThrottleConfig cfg; | |
2593 | BlockDriverState *bs; | |
2594 | BlockBackend *blk; | |
2595 | AioContext *aio_context; | |
2596 | ||
2597 | blk = blk_by_name(device); | |
2598 | if (!blk) { | |
2599 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
2600 | "Device '%s' not found", device); | |
2601 | return; | |
2602 | } | |
2603 | ||
2604 | aio_context = blk_get_aio_context(blk); | |
2605 | aio_context_acquire(aio_context); | |
2606 | ||
2607 | bs = blk_bs(blk); | |
2608 | if (!bs) { | |
2609 | error_setg(errp, "Device '%s' has no medium", device); | |
2610 | goto out; | |
2611 | } | |
2612 | ||
2613 | memset(&cfg, 0, sizeof(cfg)); | |
2614 | cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps; | |
2615 | cfg.buckets[THROTTLE_BPS_READ].avg = bps_rd; | |
2616 | cfg.buckets[THROTTLE_BPS_WRITE].avg = bps_wr; | |
2617 | ||
2618 | cfg.buckets[THROTTLE_OPS_TOTAL].avg = iops; | |
2619 | cfg.buckets[THROTTLE_OPS_READ].avg = iops_rd; | |
2620 | cfg.buckets[THROTTLE_OPS_WRITE].avg = iops_wr; | |
2621 | ||
2622 | if (has_bps_max) { | |
2623 | cfg.buckets[THROTTLE_BPS_TOTAL].max = bps_max; | |
2624 | } | |
2625 | if (has_bps_rd_max) { | |
2626 | cfg.buckets[THROTTLE_BPS_READ].max = bps_rd_max; | |
2627 | } | |
2628 | if (has_bps_wr_max) { | |
2629 | cfg.buckets[THROTTLE_BPS_WRITE].max = bps_wr_max; | |
2630 | } | |
2631 | if (has_iops_max) { | |
2632 | cfg.buckets[THROTTLE_OPS_TOTAL].max = iops_max; | |
2633 | } | |
2634 | if (has_iops_rd_max) { | |
2635 | cfg.buckets[THROTTLE_OPS_READ].max = iops_rd_max; | |
2636 | } | |
2637 | if (has_iops_wr_max) { | |
2638 | cfg.buckets[THROTTLE_OPS_WRITE].max = iops_wr_max; | |
2639 | } | |
2640 | ||
2641 | if (has_iops_size) { | |
2642 | cfg.op_size = iops_size; | |
2643 | } | |
2644 | ||
2645 | if (!check_throttle_config(&cfg, errp)) { | |
2646 | goto out; | |
2647 | } | |
2648 | ||
2649 | if (throttle_enabled(&cfg)) { | |
2650 | /* Enable I/O limits if they're not enabled yet, otherwise | |
2651 | * just update the throttling group. */ | |
2652 | if (!bs->throttle_state) { | |
2653 | bdrv_io_limits_enable(bs, has_group ? group : device); | |
2654 | } else if (has_group) { | |
2655 | bdrv_io_limits_update_group(bs, group); | |
2656 | } | |
2657 | /* Set the new throttling configuration */ | |
2658 | bdrv_set_io_limits(bs, &cfg); | |
2659 | } else if (bs->throttle_state) { | |
2660 | /* If all throttling settings are set to 0, disable I/O limits */ | |
2661 | bdrv_io_limits_disable(bs); | |
2662 | } | |
2663 | ||
2664 | out: | |
2665 | aio_context_release(aio_context); | |
2666 | } | |
2667 | ||
2668 | void qmp_block_dirty_bitmap_add(const char *node, const char *name, | |
2669 | bool has_granularity, uint32_t granularity, | |
2670 | Error **errp) | |
2671 | { | |
2672 | AioContext *aio_context; | |
2673 | BlockDriverState *bs; | |
2674 | ||
2675 | if (!name || name[0] == '\0') { | |
2676 | error_setg(errp, "Bitmap name cannot be empty"); | |
2677 | return; | |
2678 | } | |
2679 | ||
2680 | bs = bdrv_lookup_bs(node, node, errp); | |
2681 | if (!bs) { | |
2682 | return; | |
2683 | } | |
2684 | ||
2685 | aio_context = bdrv_get_aio_context(bs); | |
2686 | aio_context_acquire(aio_context); | |
2687 | ||
2688 | if (has_granularity) { | |
2689 | if (granularity < 512 || !is_power_of_2(granularity)) { | |
2690 | error_setg(errp, "Granularity must be power of 2 " | |
2691 | "and at least 512"); | |
2692 | goto out; | |
2693 | } | |
2694 | } else { | |
2695 | /* Default to cluster size, if available: */ | |
2696 | granularity = bdrv_get_default_bitmap_granularity(bs); | |
2697 | } | |
2698 | ||
2699 | bdrv_create_dirty_bitmap(bs, granularity, name, errp); | |
2700 | ||
2701 | out: | |
2702 | aio_context_release(aio_context); | |
2703 | } | |
2704 | ||
2705 | void qmp_block_dirty_bitmap_remove(const char *node, const char *name, | |
2706 | Error **errp) | |
2707 | { | |
2708 | AioContext *aio_context; | |
2709 | BlockDriverState *bs; | |
2710 | BdrvDirtyBitmap *bitmap; | |
2711 | ||
2712 | bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp); | |
2713 | if (!bitmap || !bs) { | |
2714 | return; | |
2715 | } | |
2716 | ||
2717 | if (bdrv_dirty_bitmap_frozen(bitmap)) { | |
2718 | error_setg(errp, | |
2719 | "Bitmap '%s' is currently frozen and cannot be removed", | |
2720 | name); | |
2721 | goto out; | |
2722 | } | |
2723 | bdrv_dirty_bitmap_make_anon(bitmap); | |
2724 | bdrv_release_dirty_bitmap(bs, bitmap); | |
2725 | ||
2726 | out: | |
2727 | aio_context_release(aio_context); | |
2728 | } | |
2729 | ||
2730 | /** | |
2731 | * Completely clear a bitmap, for the purposes of synchronizing a bitmap | |
2732 | * immediately after a full backup operation. | |
2733 | */ | |
2734 | void qmp_block_dirty_bitmap_clear(const char *node, const char *name, | |
2735 | Error **errp) | |
2736 | { | |
2737 | AioContext *aio_context; | |
2738 | BdrvDirtyBitmap *bitmap; | |
2739 | BlockDriverState *bs; | |
2740 | ||
2741 | bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp); | |
2742 | if (!bitmap || !bs) { | |
2743 | return; | |
2744 | } | |
2745 | ||
2746 | if (bdrv_dirty_bitmap_frozen(bitmap)) { | |
2747 | error_setg(errp, | |
2748 | "Bitmap '%s' is currently frozen and cannot be modified", | |
2749 | name); | |
2750 | goto out; | |
2751 | } else if (!bdrv_dirty_bitmap_enabled(bitmap)) { | |
2752 | error_setg(errp, | |
2753 | "Bitmap '%s' is currently disabled and cannot be cleared", | |
2754 | name); | |
2755 | goto out; | |
2756 | } | |
2757 | ||
2758 | bdrv_clear_dirty_bitmap(bitmap, NULL); | |
2759 | ||
2760 | out: | |
2761 | aio_context_release(aio_context); | |
2762 | } | |
2763 | ||
2764 | void hmp_drive_del(Monitor *mon, const QDict *qdict) | |
2765 | { | |
2766 | const char *id = qdict_get_str(qdict, "id"); | |
2767 | BlockBackend *blk; | |
2768 | BlockDriverState *bs; | |
2769 | AioContext *aio_context; | |
2770 | Error *local_err = NULL; | |
2771 | ||
2772 | blk = blk_by_name(id); | |
2773 | if (!blk) { | |
2774 | error_report("Device '%s' not found", id); | |
2775 | return; | |
2776 | } | |
2777 | ||
2778 | if (!blk_legacy_dinfo(blk)) { | |
2779 | error_report("Deleting device added with blockdev-add" | |
2780 | " is not supported"); | |
2781 | return; | |
2782 | } | |
2783 | ||
2784 | aio_context = blk_get_aio_context(blk); | |
2785 | aio_context_acquire(aio_context); | |
2786 | ||
2787 | bs = blk_bs(blk); | |
2788 | if (bs) { | |
2789 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) { | |
2790 | error_report_err(local_err); | |
2791 | aio_context_release(aio_context); | |
2792 | return; | |
2793 | } | |
2794 | ||
2795 | blk_remove_bs(blk); | |
2796 | } | |
2797 | ||
2798 | /* if we have a device attached to this BlockDriverState | |
2799 | * then we need to make the drive anonymous until the device | |
2800 | * can be removed. If this is a drive with no device backing | |
2801 | * then we can just get rid of the block driver state right here. | |
2802 | */ | |
2803 | if (blk_get_attached_dev(blk)) { | |
2804 | blk_hide_on_behalf_of_hmp_drive_del(blk); | |
2805 | /* Further I/O must not pause the guest */ | |
2806 | blk_set_on_error(blk, BLOCKDEV_ON_ERROR_REPORT, | |
2807 | BLOCKDEV_ON_ERROR_REPORT); | |
2808 | } else { | |
2809 | blk_unref(blk); | |
2810 | } | |
2811 | ||
2812 | aio_context_release(aio_context); | |
2813 | } | |
2814 | ||
2815 | void qmp_block_resize(bool has_device, const char *device, | |
2816 | bool has_node_name, const char *node_name, | |
2817 | int64_t size, Error **errp) | |
2818 | { | |
2819 | Error *local_err = NULL; | |
2820 | BlockDriverState *bs; | |
2821 | AioContext *aio_context; | |
2822 | int ret; | |
2823 | ||
2824 | bs = bdrv_lookup_bs(has_device ? device : NULL, | |
2825 | has_node_name ? node_name : NULL, | |
2826 | &local_err); | |
2827 | if (local_err) { | |
2828 | error_propagate(errp, local_err); | |
2829 | return; | |
2830 | } | |
2831 | ||
2832 | aio_context = bdrv_get_aio_context(bs); | |
2833 | aio_context_acquire(aio_context); | |
2834 | ||
2835 | if (!bdrv_is_first_non_filter(bs)) { | |
2836 | error_setg(errp, QERR_FEATURE_DISABLED, "resize"); | |
2837 | goto out; | |
2838 | } | |
2839 | ||
2840 | if (size < 0) { | |
2841 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); | |
2842 | goto out; | |
2843 | } | |
2844 | ||
2845 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) { | |
2846 | error_setg(errp, QERR_DEVICE_IN_USE, device); | |
2847 | goto out; | |
2848 | } | |
2849 | ||
2850 | /* complete all in-flight operations before resizing the device */ | |
2851 | bdrv_drain_all(); | |
2852 | ||
2853 | ret = bdrv_truncate(bs, size); | |
2854 | switch (ret) { | |
2855 | case 0: | |
2856 | break; | |
2857 | case -ENOMEDIUM: | |
2858 | error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
2859 | break; | |
2860 | case -ENOTSUP: | |
2861 | error_setg(errp, QERR_UNSUPPORTED); | |
2862 | break; | |
2863 | case -EACCES: | |
2864 | error_setg(errp, "Device '%s' is read only", device); | |
2865 | break; | |
2866 | case -EBUSY: | |
2867 | error_setg(errp, QERR_DEVICE_IN_USE, device); | |
2868 | break; | |
2869 | default: | |
2870 | error_setg_errno(errp, -ret, "Could not resize"); | |
2871 | break; | |
2872 | } | |
2873 | ||
2874 | out: | |
2875 | aio_context_release(aio_context); | |
2876 | } | |
2877 | ||
2878 | static void block_job_cb(void *opaque, int ret) | |
2879 | { | |
2880 | /* Note that this function may be executed from another AioContext besides | |
2881 | * the QEMU main loop. If you need to access anything that assumes the | |
2882 | * QEMU global mutex, use a BH or introduce a mutex. | |
2883 | */ | |
2884 | ||
2885 | BlockDriverState *bs = opaque; | |
2886 | const char *msg = NULL; | |
2887 | ||
2888 | trace_block_job_cb(bs, bs->job, ret); | |
2889 | ||
2890 | assert(bs->job); | |
2891 | ||
2892 | if (ret < 0) { | |
2893 | msg = strerror(-ret); | |
2894 | } | |
2895 | ||
2896 | if (block_job_is_cancelled(bs->job)) { | |
2897 | block_job_event_cancelled(bs->job); | |
2898 | } else { | |
2899 | block_job_event_completed(bs->job, msg); | |
2900 | } | |
2901 | } | |
2902 | ||
2903 | void qmp_block_stream(const char *device, | |
2904 | bool has_base, const char *base, | |
2905 | bool has_backing_file, const char *backing_file, | |
2906 | bool has_speed, int64_t speed, | |
2907 | bool has_on_error, BlockdevOnError on_error, | |
2908 | Error **errp) | |
2909 | { | |
2910 | BlockBackend *blk; | |
2911 | BlockDriverState *bs; | |
2912 | BlockDriverState *base_bs = NULL; | |
2913 | AioContext *aio_context; | |
2914 | Error *local_err = NULL; | |
2915 | const char *base_name = NULL; | |
2916 | ||
2917 | if (!has_on_error) { | |
2918 | on_error = BLOCKDEV_ON_ERROR_REPORT; | |
2919 | } | |
2920 | ||
2921 | blk = blk_by_name(device); | |
2922 | if (!blk) { | |
2923 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
2924 | "Device '%s' not found", device); | |
2925 | return; | |
2926 | } | |
2927 | ||
2928 | aio_context = blk_get_aio_context(blk); | |
2929 | aio_context_acquire(aio_context); | |
2930 | ||
2931 | if (!blk_is_available(blk)) { | |
2932 | error_setg(errp, "Device '%s' has no medium", device); | |
2933 | goto out; | |
2934 | } | |
2935 | bs = blk_bs(blk); | |
2936 | ||
2937 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_STREAM, errp)) { | |
2938 | goto out; | |
2939 | } | |
2940 | ||
2941 | if (has_base) { | |
2942 | base_bs = bdrv_find_backing_image(bs, base); | |
2943 | if (base_bs == NULL) { | |
2944 | error_setg(errp, QERR_BASE_NOT_FOUND, base); | |
2945 | goto out; | |
2946 | } | |
2947 | assert(bdrv_get_aio_context(base_bs) == aio_context); | |
2948 | base_name = base; | |
2949 | } | |
2950 | ||
2951 | /* if we are streaming the entire chain, the result will have no backing | |
2952 | * file, and specifying one is therefore an error */ | |
2953 | if (base_bs == NULL && has_backing_file) { | |
2954 | error_setg(errp, "backing file specified, but streaming the " | |
2955 | "entire chain"); | |
2956 | goto out; | |
2957 | } | |
2958 | ||
2959 | /* backing_file string overrides base bs filename */ | |
2960 | base_name = has_backing_file ? backing_file : base_name; | |
2961 | ||
2962 | stream_start(bs, base_bs, base_name, has_speed ? speed : 0, | |
2963 | on_error, block_job_cb, bs, &local_err); | |
2964 | if (local_err) { | |
2965 | error_propagate(errp, local_err); | |
2966 | goto out; | |
2967 | } | |
2968 | ||
2969 | trace_qmp_block_stream(bs, bs->job); | |
2970 | ||
2971 | out: | |
2972 | aio_context_release(aio_context); | |
2973 | } | |
2974 | ||
2975 | void qmp_block_commit(const char *device, | |
2976 | bool has_base, const char *base, | |
2977 | bool has_top, const char *top, | |
2978 | bool has_backing_file, const char *backing_file, | |
2979 | bool has_speed, int64_t speed, | |
2980 | Error **errp) | |
2981 | { | |
2982 | BlockBackend *blk; | |
2983 | BlockDriverState *bs; | |
2984 | BlockDriverState *base_bs, *top_bs; | |
2985 | AioContext *aio_context; | |
2986 | Error *local_err = NULL; | |
2987 | /* This will be part of the QMP command, if/when the | |
2988 | * BlockdevOnError change for blkmirror makes it in | |
2989 | */ | |
2990 | BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT; | |
2991 | ||
2992 | if (!has_speed) { | |
2993 | speed = 0; | |
2994 | } | |
2995 | ||
2996 | /* Important Note: | |
2997 | * libvirt relies on the DeviceNotFound error class in order to probe for | |
2998 | * live commit feature versions; for this to work, we must make sure to | |
2999 | * perform the device lookup before any generic errors that may occur in a | |
3000 | * scenario in which all optional arguments are omitted. */ | |
3001 | blk = blk_by_name(device); | |
3002 | if (!blk) { | |
3003 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
3004 | "Device '%s' not found", device); | |
3005 | return; | |
3006 | } | |
3007 | ||
3008 | aio_context = blk_get_aio_context(blk); | |
3009 | aio_context_acquire(aio_context); | |
3010 | ||
3011 | if (!blk_is_available(blk)) { | |
3012 | error_setg(errp, "Device '%s' has no medium", device); | |
3013 | goto out; | |
3014 | } | |
3015 | bs = blk_bs(blk); | |
3016 | ||
3017 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, errp)) { | |
3018 | goto out; | |
3019 | } | |
3020 | ||
3021 | /* default top_bs is the active layer */ | |
3022 | top_bs = bs; | |
3023 | ||
3024 | if (has_top && top) { | |
3025 | if (strcmp(bs->filename, top) != 0) { | |
3026 | top_bs = bdrv_find_backing_image(bs, top); | |
3027 | } | |
3028 | } | |
3029 | ||
3030 | if (top_bs == NULL) { | |
3031 | error_setg(errp, "Top image file %s not found", top ? top : "NULL"); | |
3032 | goto out; | |
3033 | } | |
3034 | ||
3035 | assert(bdrv_get_aio_context(top_bs) == aio_context); | |
3036 | ||
3037 | if (has_base && base) { | |
3038 | base_bs = bdrv_find_backing_image(top_bs, base); | |
3039 | } else { | |
3040 | base_bs = bdrv_find_base(top_bs); | |
3041 | } | |
3042 | ||
3043 | if (base_bs == NULL) { | |
3044 | error_setg(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL"); | |
3045 | goto out; | |
3046 | } | |
3047 | ||
3048 | assert(bdrv_get_aio_context(base_bs) == aio_context); | |
3049 | ||
3050 | if (bdrv_op_is_blocked(base_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) { | |
3051 | goto out; | |
3052 | } | |
3053 | ||
3054 | /* Do not allow attempts to commit an image into itself */ | |
3055 | if (top_bs == base_bs) { | |
3056 | error_setg(errp, "cannot commit an image into itself"); | |
3057 | goto out; | |
3058 | } | |
3059 | ||
3060 | if (top_bs == bs) { | |
3061 | if (has_backing_file) { | |
3062 | error_setg(errp, "'backing-file' specified," | |
3063 | " but 'top' is the active layer"); | |
3064 | goto out; | |
3065 | } | |
3066 | commit_active_start(bs, base_bs, speed, on_error, block_job_cb, | |
3067 | bs, &local_err); | |
3068 | } else { | |
3069 | commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs, | |
3070 | has_backing_file ? backing_file : NULL, &local_err); | |
3071 | } | |
3072 | if (local_err != NULL) { | |
3073 | error_propagate(errp, local_err); | |
3074 | goto out; | |
3075 | } | |
3076 | ||
3077 | out: | |
3078 | aio_context_release(aio_context); | |
3079 | } | |
3080 | ||
3081 | static void do_drive_backup(const char *device, const char *target, | |
3082 | bool has_format, const char *format, | |
3083 | enum MirrorSyncMode sync, | |
3084 | bool has_mode, enum NewImageMode mode, | |
3085 | bool has_speed, int64_t speed, | |
3086 | bool has_bitmap, const char *bitmap, | |
3087 | bool has_on_source_error, | |
3088 | BlockdevOnError on_source_error, | |
3089 | bool has_on_target_error, | |
3090 | BlockdevOnError on_target_error, | |
3091 | BlockJobTxn *txn, Error **errp) | |
3092 | { | |
3093 | BlockBackend *blk; | |
3094 | BlockDriverState *bs; | |
3095 | BlockDriverState *target_bs; | |
3096 | BlockDriverState *source = NULL; | |
3097 | BdrvDirtyBitmap *bmap = NULL; | |
3098 | AioContext *aio_context; | |
3099 | QDict *options = NULL; | |
3100 | Error *local_err = NULL; | |
3101 | int flags; | |
3102 | int64_t size; | |
3103 | int ret; | |
3104 | ||
3105 | if (!has_speed) { | |
3106 | speed = 0; | |
3107 | } | |
3108 | if (!has_on_source_error) { | |
3109 | on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
3110 | } | |
3111 | if (!has_on_target_error) { | |
3112 | on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
3113 | } | |
3114 | if (!has_mode) { | |
3115 | mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
3116 | } | |
3117 | ||
3118 | blk = blk_by_name(device); | |
3119 | if (!blk) { | |
3120 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
3121 | "Device '%s' not found", device); | |
3122 | return; | |
3123 | } | |
3124 | ||
3125 | aio_context = blk_get_aio_context(blk); | |
3126 | aio_context_acquire(aio_context); | |
3127 | ||
3128 | /* Although backup_run has this check too, we need to use bs->drv below, so | |
3129 | * do an early check redundantly. */ | |
3130 | if (!blk_is_available(blk)) { | |
3131 | error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
3132 | goto out; | |
3133 | } | |
3134 | bs = blk_bs(blk); | |
3135 | ||
3136 | if (!has_format) { | |
3137 | format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name; | |
3138 | } | |
3139 | ||
3140 | /* Early check to avoid creating target */ | |
3141 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) { | |
3142 | goto out; | |
3143 | } | |
3144 | ||
3145 | flags = bs->open_flags | BDRV_O_RDWR; | |
3146 | ||
3147 | /* See if we have a backing HD we can use to create our new image | |
3148 | * on top of. */ | |
3149 | if (sync == MIRROR_SYNC_MODE_TOP) { | |
3150 | source = backing_bs(bs); | |
3151 | if (!source) { | |
3152 | sync = MIRROR_SYNC_MODE_FULL; | |
3153 | } | |
3154 | } | |
3155 | if (sync == MIRROR_SYNC_MODE_NONE) { | |
3156 | source = bs; | |
3157 | } | |
3158 | ||
3159 | size = bdrv_getlength(bs); | |
3160 | if (size < 0) { | |
3161 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
3162 | goto out; | |
3163 | } | |
3164 | ||
3165 | if (mode != NEW_IMAGE_MODE_EXISTING) { | |
3166 | assert(format); | |
3167 | if (source) { | |
3168 | bdrv_img_create(target, format, source->filename, | |
3169 | source->drv->format_name, NULL, | |
3170 | size, flags, &local_err, false); | |
3171 | } else { | |
3172 | bdrv_img_create(target, format, NULL, NULL, NULL, | |
3173 | size, flags, &local_err, false); | |
3174 | } | |
3175 | } | |
3176 | ||
3177 | if (local_err) { | |
3178 | error_propagate(errp, local_err); | |
3179 | goto out; | |
3180 | } | |
3181 | ||
3182 | if (format) { | |
3183 | options = qdict_new(); | |
3184 | qdict_put(options, "driver", qstring_from_str(format)); | |
3185 | } | |
3186 | ||
3187 | target_bs = NULL; | |
3188 | ret = bdrv_open(&target_bs, target, NULL, options, flags, &local_err); | |
3189 | if (ret < 0) { | |
3190 | error_propagate(errp, local_err); | |
3191 | goto out; | |
3192 | } | |
3193 | ||
3194 | bdrv_set_aio_context(target_bs, aio_context); | |
3195 | ||
3196 | if (has_bitmap) { | |
3197 | bmap = bdrv_find_dirty_bitmap(bs, bitmap); | |
3198 | if (!bmap) { | |
3199 | error_setg(errp, "Bitmap '%s' could not be found", bitmap); | |
3200 | bdrv_unref(target_bs); | |
3201 | goto out; | |
3202 | } | |
3203 | } | |
3204 | ||
3205 | backup_start(bs, target_bs, speed, sync, bmap, | |
3206 | on_source_error, on_target_error, | |
3207 | block_job_cb, bs, txn, &local_err); | |
3208 | if (local_err != NULL) { | |
3209 | bdrv_unref(target_bs); | |
3210 | error_propagate(errp, local_err); | |
3211 | goto out; | |
3212 | } | |
3213 | ||
3214 | out: | |
3215 | aio_context_release(aio_context); | |
3216 | } | |
3217 | ||
3218 | void qmp_drive_backup(const char *device, const char *target, | |
3219 | bool has_format, const char *format, | |
3220 | enum MirrorSyncMode sync, | |
3221 | bool has_mode, enum NewImageMode mode, | |
3222 | bool has_speed, int64_t speed, | |
3223 | bool has_bitmap, const char *bitmap, | |
3224 | bool has_on_source_error, BlockdevOnError on_source_error, | |
3225 | bool has_on_target_error, BlockdevOnError on_target_error, | |
3226 | Error **errp) | |
3227 | { | |
3228 | return do_drive_backup(device, target, has_format, format, sync, | |
3229 | has_mode, mode, has_speed, speed, | |
3230 | has_bitmap, bitmap, | |
3231 | has_on_source_error, on_source_error, | |
3232 | has_on_target_error, on_target_error, | |
3233 | NULL, errp); | |
3234 | } | |
3235 | ||
3236 | BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp) | |
3237 | { | |
3238 | return bdrv_named_nodes_list(errp); | |
3239 | } | |
3240 | ||
3241 | void do_blockdev_backup(const char *device, const char *target, | |
3242 | enum MirrorSyncMode sync, | |
3243 | bool has_speed, int64_t speed, | |
3244 | bool has_on_source_error, | |
3245 | BlockdevOnError on_source_error, | |
3246 | bool has_on_target_error, | |
3247 | BlockdevOnError on_target_error, | |
3248 | BlockJobTxn *txn, Error **errp) | |
3249 | { | |
3250 | BlockBackend *blk, *target_blk; | |
3251 | BlockDriverState *bs; | |
3252 | BlockDriverState *target_bs; | |
3253 | Error *local_err = NULL; | |
3254 | AioContext *aio_context; | |
3255 | ||
3256 | if (!has_speed) { | |
3257 | speed = 0; | |
3258 | } | |
3259 | if (!has_on_source_error) { | |
3260 | on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
3261 | } | |
3262 | if (!has_on_target_error) { | |
3263 | on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
3264 | } | |
3265 | ||
3266 | blk = blk_by_name(device); | |
3267 | if (!blk) { | |
3268 | error_setg(errp, "Device '%s' not found", device); | |
3269 | return; | |
3270 | } | |
3271 | ||
3272 | aio_context = blk_get_aio_context(blk); | |
3273 | aio_context_acquire(aio_context); | |
3274 | ||
3275 | if (!blk_is_available(blk)) { | |
3276 | error_setg(errp, "Device '%s' has no medium", device); | |
3277 | goto out; | |
3278 | } | |
3279 | bs = blk_bs(blk); | |
3280 | ||
3281 | target_blk = blk_by_name(target); | |
3282 | if (!target_blk) { | |
3283 | error_setg(errp, "Device '%s' not found", target); | |
3284 | goto out; | |
3285 | } | |
3286 | ||
3287 | if (!blk_is_available(target_blk)) { | |
3288 | error_setg(errp, "Device '%s' has no medium", target); | |
3289 | goto out; | |
3290 | } | |
3291 | target_bs = blk_bs(target_blk); | |
3292 | ||
3293 | bdrv_ref(target_bs); | |
3294 | bdrv_set_aio_context(target_bs, aio_context); | |
3295 | backup_start(bs, target_bs, speed, sync, NULL, on_source_error, | |
3296 | on_target_error, block_job_cb, bs, txn, &local_err); | |
3297 | if (local_err != NULL) { | |
3298 | bdrv_unref(target_bs); | |
3299 | error_propagate(errp, local_err); | |
3300 | } | |
3301 | out: | |
3302 | aio_context_release(aio_context); | |
3303 | } | |
3304 | ||
3305 | void qmp_blockdev_backup(const char *device, const char *target, | |
3306 | enum MirrorSyncMode sync, | |
3307 | bool has_speed, int64_t speed, | |
3308 | bool has_on_source_error, | |
3309 | BlockdevOnError on_source_error, | |
3310 | bool has_on_target_error, | |
3311 | BlockdevOnError on_target_error, | |
3312 | Error **errp) | |
3313 | { | |
3314 | do_blockdev_backup(device, target, sync, has_speed, speed, | |
3315 | has_on_source_error, on_source_error, | |
3316 | has_on_target_error, on_target_error, | |
3317 | NULL, errp); | |
3318 | } | |
3319 | ||
3320 | /* Parameter check and block job starting for drive mirroring. | |
3321 | * Caller should hold @device and @target's aio context (must be the same). | |
3322 | **/ | |
3323 | static void blockdev_mirror_common(BlockDriverState *bs, | |
3324 | BlockDriverState *target, | |
3325 | bool has_replaces, const char *replaces, | |
3326 | enum MirrorSyncMode sync, | |
3327 | bool has_speed, int64_t speed, | |
3328 | bool has_granularity, uint32_t granularity, | |
3329 | bool has_buf_size, int64_t buf_size, | |
3330 | bool has_on_source_error, | |
3331 | BlockdevOnError on_source_error, | |
3332 | bool has_on_target_error, | |
3333 | BlockdevOnError on_target_error, | |
3334 | bool has_unmap, bool unmap, | |
3335 | Error **errp) | |
3336 | { | |
3337 | ||
3338 | if (!has_speed) { | |
3339 | speed = 0; | |
3340 | } | |
3341 | if (!has_on_source_error) { | |
3342 | on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
3343 | } | |
3344 | if (!has_on_target_error) { | |
3345 | on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
3346 | } | |
3347 | if (!has_granularity) { | |
3348 | granularity = 0; | |
3349 | } | |
3350 | if (!has_buf_size) { | |
3351 | buf_size = 0; | |
3352 | } | |
3353 | if (!has_unmap) { | |
3354 | unmap = true; | |
3355 | } | |
3356 | ||
3357 | if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) { | |
3358 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity", | |
3359 | "a value in range [512B, 64MB]"); | |
3360 | return; | |
3361 | } | |
3362 | if (granularity & (granularity - 1)) { | |
3363 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity", | |
3364 | "power of 2"); | |
3365 | return; | |
3366 | } | |
3367 | ||
3368 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) { | |
3369 | return; | |
3370 | } | |
3371 | if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_MIRROR_TARGET, errp)) { | |
3372 | return; | |
3373 | } | |
3374 | if (target->blk) { | |
3375 | error_setg(errp, "Cannot mirror to an attached block device"); | |
3376 | return; | |
3377 | } | |
3378 | ||
3379 | if (!bs->backing && sync == MIRROR_SYNC_MODE_TOP) { | |
3380 | sync = MIRROR_SYNC_MODE_FULL; | |
3381 | } | |
3382 | ||
3383 | /* pass the node name to replace to mirror start since it's loose coupling | |
3384 | * and will allow to check whether the node still exist at mirror completion | |
3385 | */ | |
3386 | mirror_start(bs, target, | |
3387 | has_replaces ? replaces : NULL, | |
3388 | speed, granularity, buf_size, sync, | |
3389 | on_source_error, on_target_error, unmap, | |
3390 | block_job_cb, bs, errp); | |
3391 | } | |
3392 | ||
3393 | void qmp_drive_mirror(const char *device, const char *target, | |
3394 | bool has_format, const char *format, | |
3395 | bool has_node_name, const char *node_name, | |
3396 | bool has_replaces, const char *replaces, | |
3397 | enum MirrorSyncMode sync, | |
3398 | bool has_mode, enum NewImageMode mode, | |
3399 | bool has_speed, int64_t speed, | |
3400 | bool has_granularity, uint32_t granularity, | |
3401 | bool has_buf_size, int64_t buf_size, | |
3402 | bool has_on_source_error, BlockdevOnError on_source_error, | |
3403 | bool has_on_target_error, BlockdevOnError on_target_error, | |
3404 | bool has_unmap, bool unmap, | |
3405 | Error **errp) | |
3406 | { | |
3407 | BlockDriverState *bs; | |
3408 | BlockBackend *blk; | |
3409 | BlockDriverState *source, *target_bs; | |
3410 | AioContext *aio_context; | |
3411 | Error *local_err = NULL; | |
3412 | QDict *options = NULL; | |
3413 | int flags; | |
3414 | int64_t size; | |
3415 | int ret; | |
3416 | ||
3417 | blk = blk_by_name(device); | |
3418 | if (!blk) { | |
3419 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
3420 | "Device '%s' not found", device); | |
3421 | return; | |
3422 | } | |
3423 | ||
3424 | aio_context = blk_get_aio_context(blk); | |
3425 | aio_context_acquire(aio_context); | |
3426 | ||
3427 | if (!blk_is_available(blk)) { | |
3428 | error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
3429 | goto out; | |
3430 | } | |
3431 | bs = blk_bs(blk); | |
3432 | if (!has_mode) { | |
3433 | mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
3434 | } | |
3435 | ||
3436 | if (!has_format) { | |
3437 | format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name; | |
3438 | } | |
3439 | ||
3440 | flags = bs->open_flags | BDRV_O_RDWR; | |
3441 | source = backing_bs(bs); | |
3442 | if (!source && sync == MIRROR_SYNC_MODE_TOP) { | |
3443 | sync = MIRROR_SYNC_MODE_FULL; | |
3444 | } | |
3445 | if (sync == MIRROR_SYNC_MODE_NONE) { | |
3446 | source = bs; | |
3447 | } | |
3448 | ||
3449 | size = bdrv_getlength(bs); | |
3450 | if (size < 0) { | |
3451 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
3452 | goto out; | |
3453 | } | |
3454 | ||
3455 | if (has_replaces) { | |
3456 | BlockDriverState *to_replace_bs; | |
3457 | AioContext *replace_aio_context; | |
3458 | int64_t replace_size; | |
3459 | ||
3460 | if (!has_node_name) { | |
3461 | error_setg(errp, "a node-name must be provided when replacing a" | |
3462 | " named node of the graph"); | |
3463 | goto out; | |
3464 | } | |
3465 | ||
3466 | to_replace_bs = check_to_replace_node(bs, replaces, &local_err); | |
3467 | ||
3468 | if (!to_replace_bs) { | |
3469 | error_propagate(errp, local_err); | |
3470 | goto out; | |
3471 | } | |
3472 | ||
3473 | replace_aio_context = bdrv_get_aio_context(to_replace_bs); | |
3474 | aio_context_acquire(replace_aio_context); | |
3475 | replace_size = bdrv_getlength(to_replace_bs); | |
3476 | aio_context_release(replace_aio_context); | |
3477 | ||
3478 | if (size != replace_size) { | |
3479 | error_setg(errp, "cannot replace image with a mirror image of " | |
3480 | "different size"); | |
3481 | goto out; | |
3482 | } | |
3483 | } | |
3484 | ||
3485 | if ((sync == MIRROR_SYNC_MODE_FULL || !source) | |
3486 | && mode != NEW_IMAGE_MODE_EXISTING) | |
3487 | { | |
3488 | /* create new image w/o backing file */ | |
3489 | assert(format); | |
3490 | bdrv_img_create(target, format, | |
3491 | NULL, NULL, NULL, size, flags, &local_err, false); | |
3492 | } else { | |
3493 | switch (mode) { | |
3494 | case NEW_IMAGE_MODE_EXISTING: | |
3495 | break; | |
3496 | case NEW_IMAGE_MODE_ABSOLUTE_PATHS: | |
3497 | /* create new image with backing file */ | |
3498 | bdrv_img_create(target, format, | |
3499 | source->filename, | |
3500 | source->drv->format_name, | |
3501 | NULL, size, flags, &local_err, false); | |
3502 | break; | |
3503 | default: | |
3504 | abort(); | |
3505 | } | |
3506 | } | |
3507 | ||
3508 | if (local_err) { | |
3509 | error_propagate(errp, local_err); | |
3510 | goto out; | |
3511 | } | |
3512 | ||
3513 | options = qdict_new(); | |
3514 | if (has_node_name) { | |
3515 | qdict_put(options, "node-name", qstring_from_str(node_name)); | |
3516 | } | |
3517 | if (format) { | |
3518 | qdict_put(options, "driver", qstring_from_str(format)); | |
3519 | } | |
3520 | ||
3521 | /* Mirroring takes care of copy-on-write using the source's backing | |
3522 | * file. | |
3523 | */ | |
3524 | target_bs = NULL; | |
3525 | ret = bdrv_open(&target_bs, target, NULL, options, | |
3526 | flags | BDRV_O_NO_BACKING, &local_err); | |
3527 | if (ret < 0) { | |
3528 | error_propagate(errp, local_err); | |
3529 | goto out; | |
3530 | } | |
3531 | ||
3532 | bdrv_set_aio_context(target_bs, aio_context); | |
3533 | ||
3534 | blockdev_mirror_common(bs, target_bs, | |
3535 | has_replaces, replaces, sync, | |
3536 | has_speed, speed, | |
3537 | has_granularity, granularity, | |
3538 | has_buf_size, buf_size, | |
3539 | has_on_source_error, on_source_error, | |
3540 | has_on_target_error, on_target_error, | |
3541 | has_unmap, unmap, | |
3542 | &local_err); | |
3543 | if (local_err) { | |
3544 | error_propagate(errp, local_err); | |
3545 | bdrv_unref(target_bs); | |
3546 | } | |
3547 | out: | |
3548 | aio_context_release(aio_context); | |
3549 | } | |
3550 | ||
3551 | void qmp_blockdev_mirror(const char *device, const char *target, | |
3552 | bool has_replaces, const char *replaces, | |
3553 | MirrorSyncMode sync, | |
3554 | bool has_speed, int64_t speed, | |
3555 | bool has_granularity, uint32_t granularity, | |
3556 | bool has_buf_size, int64_t buf_size, | |
3557 | bool has_on_source_error, | |
3558 | BlockdevOnError on_source_error, | |
3559 | bool has_on_target_error, | |
3560 | BlockdevOnError on_target_error, | |
3561 | Error **errp) | |
3562 | { | |
3563 | BlockDriverState *bs; | |
3564 | BlockBackend *blk; | |
3565 | BlockDriverState *target_bs; | |
3566 | AioContext *aio_context; | |
3567 | Error *local_err = NULL; | |
3568 | ||
3569 | blk = blk_by_name(device); | |
3570 | if (!blk) { | |
3571 | error_setg(errp, "Device '%s' not found", device); | |
3572 | return; | |
3573 | } | |
3574 | bs = blk_bs(blk); | |
3575 | ||
3576 | if (!bs) { | |
3577 | error_setg(errp, "Device '%s' has no media", device); | |
3578 | return; | |
3579 | } | |
3580 | ||
3581 | target_bs = bdrv_lookup_bs(target, target, errp); | |
3582 | if (!target_bs) { | |
3583 | return; | |
3584 | } | |
3585 | ||
3586 | aio_context = bdrv_get_aio_context(bs); | |
3587 | aio_context_acquire(aio_context); | |
3588 | ||
3589 | bdrv_ref(target_bs); | |
3590 | bdrv_set_aio_context(target_bs, aio_context); | |
3591 | ||
3592 | blockdev_mirror_common(bs, target_bs, | |
3593 | has_replaces, replaces, sync, | |
3594 | has_speed, speed, | |
3595 | has_granularity, granularity, | |
3596 | has_buf_size, buf_size, | |
3597 | has_on_source_error, on_source_error, | |
3598 | has_on_target_error, on_target_error, | |
3599 | true, true, | |
3600 | &local_err); | |
3601 | if (local_err) { | |
3602 | error_propagate(errp, local_err); | |
3603 | bdrv_unref(target_bs); | |
3604 | } | |
3605 | ||
3606 | aio_context_release(aio_context); | |
3607 | } | |
3608 | ||
3609 | /* Get the block job for a given device name and acquire its AioContext */ | |
3610 | static BlockJob *find_block_job(const char *device, AioContext **aio_context, | |
3611 | Error **errp) | |
3612 | { | |
3613 | BlockBackend *blk; | |
3614 | BlockDriverState *bs; | |
3615 | ||
3616 | *aio_context = NULL; | |
3617 | ||
3618 | blk = blk_by_name(device); | |
3619 | if (!blk) { | |
3620 | goto notfound; | |
3621 | } | |
3622 | ||
3623 | *aio_context = blk_get_aio_context(blk); | |
3624 | aio_context_acquire(*aio_context); | |
3625 | ||
3626 | if (!blk_is_available(blk)) { | |
3627 | goto notfound; | |
3628 | } | |
3629 | bs = blk_bs(blk); | |
3630 | ||
3631 | if (!bs->job) { | |
3632 | goto notfound; | |
3633 | } | |
3634 | ||
3635 | return bs->job; | |
3636 | ||
3637 | notfound: | |
3638 | error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE, | |
3639 | "No active block job on device '%s'", device); | |
3640 | if (*aio_context) { | |
3641 | aio_context_release(*aio_context); | |
3642 | *aio_context = NULL; | |
3643 | } | |
3644 | return NULL; | |
3645 | } | |
3646 | ||
3647 | void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) | |
3648 | { | |
3649 | AioContext *aio_context; | |
3650 | BlockJob *job = find_block_job(device, &aio_context, errp); | |
3651 | ||
3652 | if (!job) { | |
3653 | return; | |
3654 | } | |
3655 | ||
3656 | block_job_set_speed(job, speed, errp); | |
3657 | aio_context_release(aio_context); | |
3658 | } | |
3659 | ||
3660 | void qmp_block_job_cancel(const char *device, | |
3661 | bool has_force, bool force, Error **errp) | |
3662 | { | |
3663 | AioContext *aio_context; | |
3664 | BlockJob *job = find_block_job(device, &aio_context, errp); | |
3665 | ||
3666 | if (!job) { | |
3667 | return; | |
3668 | } | |
3669 | ||
3670 | if (!has_force) { | |
3671 | force = false; | |
3672 | } | |
3673 | ||
3674 | if (job->user_paused && !force) { | |
3675 | error_setg(errp, "The block job for device '%s' is currently paused", | |
3676 | device); | |
3677 | goto out; | |
3678 | } | |
3679 | ||
3680 | trace_qmp_block_job_cancel(job); | |
3681 | block_job_cancel(job); | |
3682 | out: | |
3683 | aio_context_release(aio_context); | |
3684 | } | |
3685 | ||
3686 | void qmp_block_job_pause(const char *device, Error **errp) | |
3687 | { | |
3688 | AioContext *aio_context; | |
3689 | BlockJob *job = find_block_job(device, &aio_context, errp); | |
3690 | ||
3691 | if (!job || job->user_paused) { | |
3692 | return; | |
3693 | } | |
3694 | ||
3695 | job->user_paused = true; | |
3696 | trace_qmp_block_job_pause(job); | |
3697 | block_job_pause(job); | |
3698 | aio_context_release(aio_context); | |
3699 | } | |
3700 | ||
3701 | void qmp_block_job_resume(const char *device, Error **errp) | |
3702 | { | |
3703 | AioContext *aio_context; | |
3704 | BlockJob *job = find_block_job(device, &aio_context, errp); | |
3705 | ||
3706 | if (!job || !job->user_paused) { | |
3707 | return; | |
3708 | } | |
3709 | ||
3710 | job->user_paused = false; | |
3711 | trace_qmp_block_job_resume(job); | |
3712 | block_job_resume(job); | |
3713 | aio_context_release(aio_context); | |
3714 | } | |
3715 | ||
3716 | void qmp_block_job_complete(const char *device, Error **errp) | |
3717 | { | |
3718 | AioContext *aio_context; | |
3719 | BlockJob *job = find_block_job(device, &aio_context, errp); | |
3720 | ||
3721 | if (!job) { | |
3722 | return; | |
3723 | } | |
3724 | ||
3725 | trace_qmp_block_job_complete(job); | |
3726 | block_job_complete(job, errp); | |
3727 | aio_context_release(aio_context); | |
3728 | } | |
3729 | ||
3730 | void qmp_change_backing_file(const char *device, | |
3731 | const char *image_node_name, | |
3732 | const char *backing_file, | |
3733 | Error **errp) | |
3734 | { | |
3735 | BlockBackend *blk; | |
3736 | BlockDriverState *bs = NULL; | |
3737 | AioContext *aio_context; | |
3738 | BlockDriverState *image_bs = NULL; | |
3739 | Error *local_err = NULL; | |
3740 | bool ro; | |
3741 | int open_flags; | |
3742 | int ret; | |
3743 | ||
3744 | blk = blk_by_name(device); | |
3745 | if (!blk) { | |
3746 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
3747 | "Device '%s' not found", device); | |
3748 | return; | |
3749 | } | |
3750 | ||
3751 | aio_context = blk_get_aio_context(blk); | |
3752 | aio_context_acquire(aio_context); | |
3753 | ||
3754 | if (!blk_is_available(blk)) { | |
3755 | error_setg(errp, "Device '%s' has no medium", device); | |
3756 | goto out; | |
3757 | } | |
3758 | bs = blk_bs(blk); | |
3759 | ||
3760 | image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err); | |
3761 | if (local_err) { | |
3762 | error_propagate(errp, local_err); | |
3763 | goto out; | |
3764 | } | |
3765 | ||
3766 | if (!image_bs) { | |
3767 | error_setg(errp, "image file not found"); | |
3768 | goto out; | |
3769 | } | |
3770 | ||
3771 | if (bdrv_find_base(image_bs) == image_bs) { | |
3772 | error_setg(errp, "not allowing backing file change on an image " | |
3773 | "without a backing file"); | |
3774 | goto out; | |
3775 | } | |
3776 | ||
3777 | /* even though we are not necessarily operating on bs, we need it to | |
3778 | * determine if block ops are currently prohibited on the chain */ | |
3779 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) { | |
3780 | goto out; | |
3781 | } | |
3782 | ||
3783 | /* final sanity check */ | |
3784 | if (!bdrv_chain_contains(bs, image_bs)) { | |
3785 | error_setg(errp, "'%s' and image file are not in the same chain", | |
3786 | device); | |
3787 | goto out; | |
3788 | } | |
3789 | ||
3790 | /* if not r/w, reopen to make r/w */ | |
3791 | open_flags = image_bs->open_flags; | |
3792 | ro = bdrv_is_read_only(image_bs); | |
3793 | ||
3794 | if (ro) { | |
3795 | bdrv_reopen(image_bs, open_flags | BDRV_O_RDWR, &local_err); | |
3796 | if (local_err) { | |
3797 | error_propagate(errp, local_err); | |
3798 | goto out; | |
3799 | } | |
3800 | } | |
3801 | ||
3802 | ret = bdrv_change_backing_file(image_bs, backing_file, | |
3803 | image_bs->drv ? image_bs->drv->format_name : ""); | |
3804 | ||
3805 | if (ret < 0) { | |
3806 | error_setg_errno(errp, -ret, "Could not change backing file to '%s'", | |
3807 | backing_file); | |
3808 | /* don't exit here, so we can try to restore open flags if | |
3809 | * appropriate */ | |
3810 | } | |
3811 | ||
3812 | if (ro) { | |
3813 | bdrv_reopen(image_bs, open_flags, &local_err); | |
3814 | if (local_err) { | |
3815 | error_propagate(errp, local_err); /* will preserve prior errp */ | |
3816 | } | |
3817 | } | |
3818 | ||
3819 | out: | |
3820 | aio_context_release(aio_context); | |
3821 | } | |
3822 | ||
3823 | void qmp_blockdev_add(BlockdevOptions *options, Error **errp) | |
3824 | { | |
3825 | QmpOutputVisitor *ov = qmp_output_visitor_new(); | |
3826 | BlockDriverState *bs; | |
3827 | BlockBackend *blk = NULL; | |
3828 | QObject *obj; | |
3829 | QDict *qdict; | |
3830 | Error *local_err = NULL; | |
3831 | ||
3832 | /* TODO Sort it out in raw-posix and drive_new(): Reject aio=native with | |
3833 | * cache.direct=false instead of silently switching to aio=threads, except | |
3834 | * when called from drive_new(). | |
3835 | * | |
3836 | * For now, simply forbidding the combination for all drivers will do. */ | |
3837 | if (options->has_aio && options->aio == BLOCKDEV_AIO_OPTIONS_NATIVE) { | |
3838 | bool direct = options->has_cache && | |
3839 | options->cache->has_direct && | |
3840 | options->cache->direct; | |
3841 | if (!direct) { | |
3842 | error_setg(errp, "aio=native requires cache.direct=true"); | |
3843 | goto fail; | |
3844 | } | |
3845 | } | |
3846 | ||
3847 | visit_type_BlockdevOptions(qmp_output_get_visitor(ov), | |
3848 | &options, NULL, &local_err); | |
3849 | if (local_err) { | |
3850 | error_propagate(errp, local_err); | |
3851 | goto fail; | |
3852 | } | |
3853 | ||
3854 | obj = qmp_output_get_qobject(ov); | |
3855 | qdict = qobject_to_qdict(obj); | |
3856 | ||
3857 | qdict_flatten(qdict); | |
3858 | ||
3859 | if (options->has_id) { | |
3860 | blk = blockdev_init(NULL, qdict, &local_err); | |
3861 | if (local_err) { | |
3862 | error_propagate(errp, local_err); | |
3863 | goto fail; | |
3864 | } | |
3865 | ||
3866 | bs = blk_bs(blk); | |
3867 | } else { | |
3868 | if (!qdict_get_try_str(qdict, "node-name")) { | |
3869 | error_setg(errp, "'id' and/or 'node-name' need to be specified for " | |
3870 | "the root node"); | |
3871 | goto fail; | |
3872 | } | |
3873 | ||
3874 | bs = bds_tree_init(qdict, errp); | |
3875 | if (!bs) { | |
3876 | goto fail; | |
3877 | } | |
3878 | } | |
3879 | ||
3880 | if (bs && bdrv_key_required(bs)) { | |
3881 | if (blk) { | |
3882 | blk_unref(blk); | |
3883 | } else { | |
3884 | bdrv_unref(bs); | |
3885 | } | |
3886 | error_setg(errp, "blockdev-add doesn't support encrypted devices"); | |
3887 | goto fail; | |
3888 | } | |
3889 | ||
3890 | fail: | |
3891 | qmp_output_visitor_cleanup(ov); | |
3892 | } | |
3893 | ||
3894 | void qmp_x_blockdev_del(bool has_id, const char *id, | |
3895 | bool has_node_name, const char *node_name, Error **errp) | |
3896 | { | |
3897 | AioContext *aio_context; | |
3898 | BlockBackend *blk; | |
3899 | BlockDriverState *bs; | |
3900 | ||
3901 | if (has_id && has_node_name) { | |
3902 | error_setg(errp, "Only one of id and node-name must be specified"); | |
3903 | return; | |
3904 | } else if (!has_id && !has_node_name) { | |
3905 | error_setg(errp, "No block device specified"); | |
3906 | return; | |
3907 | } | |
3908 | ||
3909 | if (has_id) { | |
3910 | blk = blk_by_name(id); | |
3911 | if (!blk) { | |
3912 | error_setg(errp, "Cannot find block backend %s", id); | |
3913 | return; | |
3914 | } | |
3915 | if (blk_get_refcnt(blk) > 1) { | |
3916 | error_setg(errp, "Block backend %s is in use", id); | |
3917 | return; | |
3918 | } | |
3919 | bs = blk_bs(blk); | |
3920 | aio_context = blk_get_aio_context(blk); | |
3921 | } else { | |
3922 | bs = bdrv_find_node(node_name); | |
3923 | if (!bs) { | |
3924 | error_setg(errp, "Cannot find node %s", node_name); | |
3925 | return; | |
3926 | } | |
3927 | blk = bs->blk; | |
3928 | if (blk) { | |
3929 | error_setg(errp, "Node %s is in use by %s", | |
3930 | node_name, blk_name(blk)); | |
3931 | return; | |
3932 | } | |
3933 | aio_context = bdrv_get_aio_context(bs); | |
3934 | } | |
3935 | ||
3936 | aio_context_acquire(aio_context); | |
3937 | ||
3938 | if (bs) { | |
3939 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, errp)) { | |
3940 | goto out; | |
3941 | } | |
3942 | ||
3943 | if (bs->refcnt > 1 || !QLIST_EMPTY(&bs->parents)) { | |
3944 | error_setg(errp, "Block device %s is in use", | |
3945 | bdrv_get_device_or_node_name(bs)); | |
3946 | goto out; | |
3947 | } | |
3948 | } | |
3949 | ||
3950 | if (blk) { | |
3951 | blk_unref(blk); | |
3952 | } else { | |
3953 | bdrv_unref(bs); | |
3954 | } | |
3955 | ||
3956 | out: | |
3957 | aio_context_release(aio_context); | |
3958 | } | |
3959 | ||
3960 | BlockJobInfoList *qmp_query_block_jobs(Error **errp) | |
3961 | { | |
3962 | BlockJobInfoList *head = NULL, **p_next = &head; | |
3963 | BlockDriverState *bs; | |
3964 | ||
3965 | for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) { | |
3966 | AioContext *aio_context = bdrv_get_aio_context(bs); | |
3967 | ||
3968 | aio_context_acquire(aio_context); | |
3969 | ||
3970 | if (bs->job) { | |
3971 | BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1); | |
3972 | elem->value = block_job_query(bs->job); | |
3973 | *p_next = elem; | |
3974 | p_next = &elem->next; | |
3975 | } | |
3976 | ||
3977 | aio_context_release(aio_context); | |
3978 | } | |
3979 | ||
3980 | return head; | |
3981 | } | |
3982 | ||
3983 | QemuOptsList qemu_common_drive_opts = { | |
3984 | .name = "drive", | |
3985 | .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head), | |
3986 | .desc = { | |
3987 | { | |
3988 | .name = "snapshot", | |
3989 | .type = QEMU_OPT_BOOL, | |
3990 | .help = "enable/disable snapshot mode", | |
3991 | },{ | |
3992 | .name = "discard", | |
3993 | .type = QEMU_OPT_STRING, | |
3994 | .help = "discard operation (ignore/off, unmap/on)", | |
3995 | },{ | |
3996 | .name = "aio", | |
3997 | .type = QEMU_OPT_STRING, | |
3998 | .help = "host AIO implementation (threads, native)", | |
3999 | },{ | |
4000 | .name = "format", | |
4001 | .type = QEMU_OPT_STRING, | |
4002 | .help = "disk format (raw, qcow2, ...)", | |
4003 | },{ | |
4004 | .name = "rerror", | |
4005 | .type = QEMU_OPT_STRING, | |
4006 | .help = "read error action", | |
4007 | },{ | |
4008 | .name = "werror", | |
4009 | .type = QEMU_OPT_STRING, | |
4010 | .help = "write error action", | |
4011 | },{ | |
4012 | .name = "read-only", | |
4013 | .type = QEMU_OPT_BOOL, | |
4014 | .help = "open drive file as read-only", | |
4015 | },{ | |
4016 | .name = "throttling.iops-total", | |
4017 | .type = QEMU_OPT_NUMBER, | |
4018 | .help = "limit total I/O operations per second", | |
4019 | },{ | |
4020 | .name = "throttling.iops-read", | |
4021 | .type = QEMU_OPT_NUMBER, | |
4022 | .help = "limit read operations per second", | |
4023 | },{ | |
4024 | .name = "throttling.iops-write", | |
4025 | .type = QEMU_OPT_NUMBER, | |
4026 | .help = "limit write operations per second", | |
4027 | },{ | |
4028 | .name = "throttling.bps-total", | |
4029 | .type = QEMU_OPT_NUMBER, | |
4030 | .help = "limit total bytes per second", | |
4031 | },{ | |
4032 | .name = "throttling.bps-read", | |
4033 | .type = QEMU_OPT_NUMBER, | |
4034 | .help = "limit read bytes per second", | |
4035 | },{ | |
4036 | .name = "throttling.bps-write", | |
4037 | .type = QEMU_OPT_NUMBER, | |
4038 | .help = "limit write bytes per second", | |
4039 | },{ | |
4040 | .name = "throttling.iops-total-max", | |
4041 | .type = QEMU_OPT_NUMBER, | |
4042 | .help = "I/O operations burst", | |
4043 | },{ | |
4044 | .name = "throttling.iops-read-max", | |
4045 | .type = QEMU_OPT_NUMBER, | |
4046 | .help = "I/O operations read burst", | |
4047 | },{ | |
4048 | .name = "throttling.iops-write-max", | |
4049 | .type = QEMU_OPT_NUMBER, | |
4050 | .help = "I/O operations write burst", | |
4051 | },{ | |
4052 | .name = "throttling.bps-total-max", | |
4053 | .type = QEMU_OPT_NUMBER, | |
4054 | .help = "total bytes burst", | |
4055 | },{ | |
4056 | .name = "throttling.bps-read-max", | |
4057 | .type = QEMU_OPT_NUMBER, | |
4058 | .help = "total bytes read burst", | |
4059 | },{ | |
4060 | .name = "throttling.bps-write-max", | |
4061 | .type = QEMU_OPT_NUMBER, | |
4062 | .help = "total bytes write burst", | |
4063 | },{ | |
4064 | .name = "throttling.iops-size", | |
4065 | .type = QEMU_OPT_NUMBER, | |
4066 | .help = "when limiting by iops max size of an I/O in bytes", | |
4067 | },{ | |
4068 | .name = "throttling.group", | |
4069 | .type = QEMU_OPT_STRING, | |
4070 | .help = "name of the block throttling group", | |
4071 | },{ | |
4072 | .name = "copy-on-read", | |
4073 | .type = QEMU_OPT_BOOL, | |
4074 | .help = "copy read data from backing file into image file", | |
4075 | },{ | |
4076 | .name = "detect-zeroes", | |
4077 | .type = QEMU_OPT_STRING, | |
4078 | .help = "try to optimize zero writes (off, on, unmap)", | |
4079 | },{ | |
4080 | .name = "stats-account-invalid", | |
4081 | .type = QEMU_OPT_BOOL, | |
4082 | .help = "whether to account for invalid I/O operations " | |
4083 | "in the statistics", | |
4084 | },{ | |
4085 | .name = "stats-account-failed", | |
4086 | .type = QEMU_OPT_BOOL, | |
4087 | .help = "whether to account for failed I/O operations " | |
4088 | "in the statistics", | |
4089 | }, | |
4090 | { /* end of list */ } | |
4091 | }, | |
4092 | }; | |
4093 | ||
4094 | static QemuOptsList qemu_root_bds_opts = { | |
4095 | .name = "root-bds", | |
4096 | .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head), | |
4097 | .desc = { | |
4098 | { | |
4099 | .name = "discard", | |
4100 | .type = QEMU_OPT_STRING, | |
4101 | .help = "discard operation (ignore/off, unmap/on)", | |
4102 | },{ | |
4103 | .name = "aio", | |
4104 | .type = QEMU_OPT_STRING, | |
4105 | .help = "host AIO implementation (threads, native)", | |
4106 | },{ | |
4107 | .name = "read-only", | |
4108 | .type = QEMU_OPT_BOOL, | |
4109 | .help = "open drive file as read-only", | |
4110 | },{ | |
4111 | .name = "copy-on-read", | |
4112 | .type = QEMU_OPT_BOOL, | |
4113 | .help = "copy read data from backing file into image file", | |
4114 | },{ | |
4115 | .name = "detect-zeroes", | |
4116 | .type = QEMU_OPT_STRING, | |
4117 | .help = "try to optimize zero writes (off, on, unmap)", | |
4118 | }, | |
4119 | { /* end of list */ } | |
4120 | }, | |
4121 | }; | |
4122 | ||
4123 | QemuOptsList qemu_drive_opts = { | |
4124 | .name = "drive", | |
4125 | .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head), | |
4126 | .desc = { | |
4127 | /* | |
4128 | * no elements => accept any params | |
4129 | * validation will happen later | |
4130 | */ | |
4131 | { /* end of list */ } | |
4132 | }, | |
4133 | }; |