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1 | /* | |
2 | * QEMU host block devices | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
5 | * | |
6 | * This work is licensed under the terms of the GNU GPL, version 2 or | |
7 | * later. See the COPYING file in the top-level directory. | |
8 | * | |
9 | * This file incorporates work covered by the following copyright and | |
10 | * permission notice: | |
11 | * | |
12 | * Copyright (c) 2003-2008 Fabrice Bellard | |
13 | * | |
14 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
15 | * of this software and associated documentation files (the "Software"), to deal | |
16 | * in the Software without restriction, including without limitation the rights | |
17 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
18 | * copies of the Software, and to permit persons to whom the Software is | |
19 | * furnished to do so, subject to the following conditions: | |
20 | * | |
21 | * The above copyright notice and this permission notice shall be included in | |
22 | * all copies or substantial portions of the Software. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
25 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
26 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
27 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
28 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
29 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
30 | * THE SOFTWARE. | |
31 | */ | |
32 | ||
33 | #include "qemu/osdep.h" | |
34 | #include "sysemu/block-backend.h" | |
35 | #include "sysemu/blockdev.h" | |
36 | #include "hw/block/block.h" | |
37 | #include "block/blockjob.h" | |
38 | #include "block/throttle-groups.h" | |
39 | #include "monitor/monitor.h" | |
40 | #include "qemu/error-report.h" | |
41 | #include "qemu/option.h" | |
42 | #include "qemu/config-file.h" | |
43 | #include "qapi/qmp/types.h" | |
44 | #include "qapi-visit.h" | |
45 | #include "qapi/qmp/qerror.h" | |
46 | #include "qapi/qmp-output-visitor.h" | |
47 | #include "qapi/util.h" | |
48 | #include "sysemu/sysemu.h" | |
49 | #include "block/block_int.h" | |
50 | #include "qmp-commands.h" | |
51 | #include "trace.h" | |
52 | #include "sysemu/arch_init.h" | |
53 | #include "qemu/cutils.h" | |
54 | #include "qemu/help_option.h" | |
55 | ||
56 | static QTAILQ_HEAD(, BlockDriverState) monitor_bdrv_states = | |
57 | QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states); | |
58 | ||
59 | static int do_open_tray(const char *device, bool force, Error **errp); | |
60 | ||
61 | static const char *const if_name[IF_COUNT] = { | |
62 | [IF_NONE] = "none", | |
63 | [IF_IDE] = "ide", | |
64 | [IF_SCSI] = "scsi", | |
65 | [IF_FLOPPY] = "floppy", | |
66 | [IF_PFLASH] = "pflash", | |
67 | [IF_MTD] = "mtd", | |
68 | [IF_SD] = "sd", | |
69 | [IF_VIRTIO] = "virtio", | |
70 | [IF_XEN] = "xen", | |
71 | }; | |
72 | ||
73 | static int if_max_devs[IF_COUNT] = { | |
74 | /* | |
75 | * Do not change these numbers! They govern how drive option | |
76 | * index maps to unit and bus. That mapping is ABI. | |
77 | * | |
78 | * All controllers used to implement if=T drives need to support | |
79 | * if_max_devs[T] units, for any T with if_max_devs[T] != 0. | |
80 | * Otherwise, some index values map to "impossible" bus, unit | |
81 | * values. | |
82 | * | |
83 | * For instance, if you change [IF_SCSI] to 255, -drive | |
84 | * if=scsi,index=12 no longer means bus=1,unit=5, but | |
85 | * bus=0,unit=12. With an lsi53c895a controller (7 units max), | |
86 | * the drive can't be set up. Regression. | |
87 | */ | |
88 | [IF_IDE] = 2, | |
89 | [IF_SCSI] = 7, | |
90 | }; | |
91 | ||
92 | /** | |
93 | * Boards may call this to offer board-by-board overrides | |
94 | * of the default, global values. | |
95 | */ | |
96 | void override_max_devs(BlockInterfaceType type, int max_devs) | |
97 | { | |
98 | BlockBackend *blk; | |
99 | DriveInfo *dinfo; | |
100 | ||
101 | if (max_devs <= 0) { | |
102 | return; | |
103 | } | |
104 | ||
105 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { | |
106 | dinfo = blk_legacy_dinfo(blk); | |
107 | if (dinfo->type == type) { | |
108 | fprintf(stderr, "Cannot override units-per-bus property of" | |
109 | " the %s interface, because a drive of that type has" | |
110 | " already been added.\n", if_name[type]); | |
111 | g_assert_not_reached(); | |
112 | } | |
113 | } | |
114 | ||
115 | if_max_devs[type] = max_devs; | |
116 | } | |
117 | ||
118 | /* | |
119 | * We automatically delete the drive when a device using it gets | |
120 | * unplugged. Questionable feature, but we can't just drop it. | |
121 | * Device models call blockdev_mark_auto_del() to schedule the | |
122 | * automatic deletion, and generic qdev code calls blockdev_auto_del() | |
123 | * when deletion is actually safe. | |
124 | */ | |
125 | void blockdev_mark_auto_del(BlockBackend *blk) | |
126 | { | |
127 | DriveInfo *dinfo = blk_legacy_dinfo(blk); | |
128 | BlockDriverState *bs = blk_bs(blk); | |
129 | AioContext *aio_context; | |
130 | ||
131 | if (!dinfo) { | |
132 | return; | |
133 | } | |
134 | ||
135 | if (bs) { | |
136 | aio_context = bdrv_get_aio_context(bs); | |
137 | aio_context_acquire(aio_context); | |
138 | ||
139 | if (bs->job) { | |
140 | block_job_cancel(bs->job); | |
141 | } | |
142 | ||
143 | aio_context_release(aio_context); | |
144 | } | |
145 | ||
146 | dinfo->auto_del = 1; | |
147 | } | |
148 | ||
149 | void blockdev_auto_del(BlockBackend *blk) | |
150 | { | |
151 | DriveInfo *dinfo = blk_legacy_dinfo(blk); | |
152 | ||
153 | if (dinfo && dinfo->auto_del) { | |
154 | monitor_remove_blk(blk); | |
155 | blk_unref(blk); | |
156 | } | |
157 | } | |
158 | ||
159 | /** | |
160 | * Returns the current mapping of how many units per bus | |
161 | * a particular interface can support. | |
162 | * | |
163 | * A positive integer indicates n units per bus. | |
164 | * 0 implies the mapping has not been established. | |
165 | * -1 indicates an invalid BlockInterfaceType was given. | |
166 | */ | |
167 | int drive_get_max_devs(BlockInterfaceType type) | |
168 | { | |
169 | if (type >= IF_IDE && type < IF_COUNT) { | |
170 | return if_max_devs[type]; | |
171 | } | |
172 | ||
173 | return -1; | |
174 | } | |
175 | ||
176 | static int drive_index_to_bus_id(BlockInterfaceType type, int index) | |
177 | { | |
178 | int max_devs = if_max_devs[type]; | |
179 | return max_devs ? index / max_devs : 0; | |
180 | } | |
181 | ||
182 | static int drive_index_to_unit_id(BlockInterfaceType type, int index) | |
183 | { | |
184 | int max_devs = if_max_devs[type]; | |
185 | return max_devs ? index % max_devs : index; | |
186 | } | |
187 | ||
188 | QemuOpts *drive_def(const char *optstr) | |
189 | { | |
190 | return qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr, false); | |
191 | } | |
192 | ||
193 | QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, | |
194 | const char *optstr) | |
195 | { | |
196 | QemuOpts *opts; | |
197 | ||
198 | opts = drive_def(optstr); | |
199 | if (!opts) { | |
200 | return NULL; | |
201 | } | |
202 | if (type != IF_DEFAULT) { | |
203 | qemu_opt_set(opts, "if", if_name[type], &error_abort); | |
204 | } | |
205 | if (index >= 0) { | |
206 | qemu_opt_set_number(opts, "index", index, &error_abort); | |
207 | } | |
208 | if (file) | |
209 | qemu_opt_set(opts, "file", file, &error_abort); | |
210 | return opts; | |
211 | } | |
212 | ||
213 | DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) | |
214 | { | |
215 | BlockBackend *blk; | |
216 | DriveInfo *dinfo; | |
217 | ||
218 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { | |
219 | dinfo = blk_legacy_dinfo(blk); | |
220 | if (dinfo && dinfo->type == type | |
221 | && dinfo->bus == bus && dinfo->unit == unit) { | |
222 | return dinfo; | |
223 | } | |
224 | } | |
225 | ||
226 | return NULL; | |
227 | } | |
228 | ||
229 | bool drive_check_orphaned(void) | |
230 | { | |
231 | BlockBackend *blk; | |
232 | DriveInfo *dinfo; | |
233 | bool rs = false; | |
234 | ||
235 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { | |
236 | dinfo = blk_legacy_dinfo(blk); | |
237 | /* If dinfo->bdrv->dev is NULL, it has no device attached. */ | |
238 | /* Unless this is a default drive, this may be an oversight. */ | |
239 | if (!blk_get_attached_dev(blk) && !dinfo->is_default && | |
240 | dinfo->type != IF_NONE) { | |
241 | fprintf(stderr, "Warning: Orphaned drive without device: " | |
242 | "id=%s,file=%s,if=%s,bus=%d,unit=%d\n", | |
243 | blk_name(blk), blk_bs(blk) ? blk_bs(blk)->filename : "", | |
244 | if_name[dinfo->type], dinfo->bus, dinfo->unit); | |
245 | rs = true; | |
246 | } | |
247 | } | |
248 | ||
249 | return rs; | |
250 | } | |
251 | ||
252 | DriveInfo *drive_get_by_index(BlockInterfaceType type, int index) | |
253 | { | |
254 | return drive_get(type, | |
255 | drive_index_to_bus_id(type, index), | |
256 | drive_index_to_unit_id(type, index)); | |
257 | } | |
258 | ||
259 | int drive_get_max_bus(BlockInterfaceType type) | |
260 | { | |
261 | int max_bus; | |
262 | BlockBackend *blk; | |
263 | DriveInfo *dinfo; | |
264 | ||
265 | max_bus = -1; | |
266 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { | |
267 | dinfo = blk_legacy_dinfo(blk); | |
268 | if (dinfo && dinfo->type == type && dinfo->bus > max_bus) { | |
269 | max_bus = dinfo->bus; | |
270 | } | |
271 | } | |
272 | return max_bus; | |
273 | } | |
274 | ||
275 | /* Get a block device. This should only be used for single-drive devices | |
276 | (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the | |
277 | appropriate bus. */ | |
278 | DriveInfo *drive_get_next(BlockInterfaceType type) | |
279 | { | |
280 | static int next_block_unit[IF_COUNT]; | |
281 | ||
282 | return drive_get(type, 0, next_block_unit[type]++); | |
283 | } | |
284 | ||
285 | static void bdrv_format_print(void *opaque, const char *name) | |
286 | { | |
287 | error_printf(" %s", name); | |
288 | } | |
289 | ||
290 | typedef struct { | |
291 | QEMUBH *bh; | |
292 | BlockDriverState *bs; | |
293 | } BDRVPutRefBH; | |
294 | ||
295 | static int parse_block_error_action(const char *buf, bool is_read, Error **errp) | |
296 | { | |
297 | if (!strcmp(buf, "ignore")) { | |
298 | return BLOCKDEV_ON_ERROR_IGNORE; | |
299 | } else if (!is_read && !strcmp(buf, "enospc")) { | |
300 | return BLOCKDEV_ON_ERROR_ENOSPC; | |
301 | } else if (!strcmp(buf, "stop")) { | |
302 | return BLOCKDEV_ON_ERROR_STOP; | |
303 | } else if (!strcmp(buf, "report")) { | |
304 | return BLOCKDEV_ON_ERROR_REPORT; | |
305 | } else { | |
306 | error_setg(errp, "'%s' invalid %s error action", | |
307 | buf, is_read ? "read" : "write"); | |
308 | return -1; | |
309 | } | |
310 | } | |
311 | ||
312 | static bool parse_stats_intervals(BlockAcctStats *stats, QList *intervals, | |
313 | Error **errp) | |
314 | { | |
315 | const QListEntry *entry; | |
316 | for (entry = qlist_first(intervals); entry; entry = qlist_next(entry)) { | |
317 | switch (qobject_type(entry->value)) { | |
318 | ||
319 | case QTYPE_QSTRING: { | |
320 | unsigned long long length; | |
321 | const char *str = qstring_get_str(qobject_to_qstring(entry->value)); | |
322 | if (parse_uint_full(str, &length, 10) == 0 && | |
323 | length > 0 && length <= UINT_MAX) { | |
324 | block_acct_add_interval(stats, (unsigned) length); | |
325 | } else { | |
326 | error_setg(errp, "Invalid interval length: %s", str); | |
327 | return false; | |
328 | } | |
329 | break; | |
330 | } | |
331 | ||
332 | case QTYPE_QINT: { | |
333 | int64_t length = qint_get_int(qobject_to_qint(entry->value)); | |
334 | if (length > 0 && length <= UINT_MAX) { | |
335 | block_acct_add_interval(stats, (unsigned) length); | |
336 | } else { | |
337 | error_setg(errp, "Invalid interval length: %" PRId64, length); | |
338 | return false; | |
339 | } | |
340 | break; | |
341 | } | |
342 | ||
343 | default: | |
344 | error_setg(errp, "The specification of stats-intervals is invalid"); | |
345 | return false; | |
346 | } | |
347 | } | |
348 | return true; | |
349 | } | |
350 | ||
351 | typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType; | |
352 | ||
353 | /* All parameters but @opts are optional and may be set to NULL. */ | |
354 | static void extract_common_blockdev_options(QemuOpts *opts, int *bdrv_flags, | |
355 | const char **throttling_group, ThrottleConfig *throttle_cfg, | |
356 | BlockdevDetectZeroesOptions *detect_zeroes, Error **errp) | |
357 | { | |
358 | const char *discard; | |
359 | Error *local_error = NULL; | |
360 | const char *aio; | |
361 | ||
362 | if (bdrv_flags) { | |
363 | if (!qemu_opt_get_bool(opts, "read-only", false)) { | |
364 | *bdrv_flags |= BDRV_O_RDWR; | |
365 | } | |
366 | if (qemu_opt_get_bool(opts, "copy-on-read", false)) { | |
367 | *bdrv_flags |= BDRV_O_COPY_ON_READ; | |
368 | } | |
369 | ||
370 | if ((discard = qemu_opt_get(opts, "discard")) != NULL) { | |
371 | if (bdrv_parse_discard_flags(discard, bdrv_flags) != 0) { | |
372 | error_setg(errp, "Invalid discard option"); | |
373 | return; | |
374 | } | |
375 | } | |
376 | ||
377 | if ((aio = qemu_opt_get(opts, "aio")) != NULL) { | |
378 | if (!strcmp(aio, "native")) { | |
379 | *bdrv_flags |= BDRV_O_NATIVE_AIO; | |
380 | } else if (!strcmp(aio, "threads")) { | |
381 | /* this is the default */ | |
382 | } else { | |
383 | error_setg(errp, "invalid aio option"); | |
384 | return; | |
385 | } | |
386 | } | |
387 | } | |
388 | ||
389 | /* disk I/O throttling */ | |
390 | if (throttling_group) { | |
391 | *throttling_group = qemu_opt_get(opts, "throttling.group"); | |
392 | } | |
393 | ||
394 | if (throttle_cfg) { | |
395 | throttle_config_init(throttle_cfg); | |
396 | throttle_cfg->buckets[THROTTLE_BPS_TOTAL].avg = | |
397 | qemu_opt_get_number(opts, "throttling.bps-total", 0); | |
398 | throttle_cfg->buckets[THROTTLE_BPS_READ].avg = | |
399 | qemu_opt_get_number(opts, "throttling.bps-read", 0); | |
400 | throttle_cfg->buckets[THROTTLE_BPS_WRITE].avg = | |
401 | qemu_opt_get_number(opts, "throttling.bps-write", 0); | |
402 | throttle_cfg->buckets[THROTTLE_OPS_TOTAL].avg = | |
403 | qemu_opt_get_number(opts, "throttling.iops-total", 0); | |
404 | throttle_cfg->buckets[THROTTLE_OPS_READ].avg = | |
405 | qemu_opt_get_number(opts, "throttling.iops-read", 0); | |
406 | throttle_cfg->buckets[THROTTLE_OPS_WRITE].avg = | |
407 | qemu_opt_get_number(opts, "throttling.iops-write", 0); | |
408 | ||
409 | throttle_cfg->buckets[THROTTLE_BPS_TOTAL].max = | |
410 | qemu_opt_get_number(opts, "throttling.bps-total-max", 0); | |
411 | throttle_cfg->buckets[THROTTLE_BPS_READ].max = | |
412 | qemu_opt_get_number(opts, "throttling.bps-read-max", 0); | |
413 | throttle_cfg->buckets[THROTTLE_BPS_WRITE].max = | |
414 | qemu_opt_get_number(opts, "throttling.bps-write-max", 0); | |
415 | throttle_cfg->buckets[THROTTLE_OPS_TOTAL].max = | |
416 | qemu_opt_get_number(opts, "throttling.iops-total-max", 0); | |
417 | throttle_cfg->buckets[THROTTLE_OPS_READ].max = | |
418 | qemu_opt_get_number(opts, "throttling.iops-read-max", 0); | |
419 | throttle_cfg->buckets[THROTTLE_OPS_WRITE].max = | |
420 | qemu_opt_get_number(opts, "throttling.iops-write-max", 0); | |
421 | ||
422 | throttle_cfg->buckets[THROTTLE_BPS_TOTAL].burst_length = | |
423 | qemu_opt_get_number(opts, "throttling.bps-total-max-length", 1); | |
424 | throttle_cfg->buckets[THROTTLE_BPS_READ].burst_length = | |
425 | qemu_opt_get_number(opts, "throttling.bps-read-max-length", 1); | |
426 | throttle_cfg->buckets[THROTTLE_BPS_WRITE].burst_length = | |
427 | qemu_opt_get_number(opts, "throttling.bps-write-max-length", 1); | |
428 | throttle_cfg->buckets[THROTTLE_OPS_TOTAL].burst_length = | |
429 | qemu_opt_get_number(opts, "throttling.iops-total-max-length", 1); | |
430 | throttle_cfg->buckets[THROTTLE_OPS_READ].burst_length = | |
431 | qemu_opt_get_number(opts, "throttling.iops-read-max-length", 1); | |
432 | throttle_cfg->buckets[THROTTLE_OPS_WRITE].burst_length = | |
433 | qemu_opt_get_number(opts, "throttling.iops-write-max-length", 1); | |
434 | ||
435 | throttle_cfg->op_size = | |
436 | qemu_opt_get_number(opts, "throttling.iops-size", 0); | |
437 | ||
438 | if (!throttle_is_valid(throttle_cfg, errp)) { | |
439 | return; | |
440 | } | |
441 | } | |
442 | ||
443 | if (detect_zeroes) { | |
444 | *detect_zeroes = | |
445 | qapi_enum_parse(BlockdevDetectZeroesOptions_lookup, | |
446 | qemu_opt_get(opts, "detect-zeroes"), | |
447 | BLOCKDEV_DETECT_ZEROES_OPTIONS__MAX, | |
448 | BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, | |
449 | &local_error); | |
450 | if (local_error) { | |
451 | error_propagate(errp, local_error); | |
452 | return; | |
453 | } | |
454 | ||
455 | if (bdrv_flags && | |
456 | *detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && | |
457 | !(*bdrv_flags & BDRV_O_UNMAP)) | |
458 | { | |
459 | error_setg(errp, "setting detect-zeroes to unmap is not allowed " | |
460 | "without setting discard operation to unmap"); | |
461 | return; | |
462 | } | |
463 | } | |
464 | } | |
465 | ||
466 | /* Takes the ownership of bs_opts */ | |
467 | static BlockBackend *blockdev_init(const char *file, QDict *bs_opts, | |
468 | Error **errp) | |
469 | { | |
470 | const char *buf; | |
471 | int bdrv_flags = 0; | |
472 | int on_read_error, on_write_error; | |
473 | bool account_invalid, account_failed; | |
474 | bool writethrough; | |
475 | BlockBackend *blk; | |
476 | BlockDriverState *bs; | |
477 | ThrottleConfig cfg; | |
478 | int snapshot = 0; | |
479 | Error *error = NULL; | |
480 | QemuOpts *opts; | |
481 | QDict *interval_dict = NULL; | |
482 | QList *interval_list = NULL; | |
483 | const char *id; | |
484 | BlockdevDetectZeroesOptions detect_zeroes = | |
485 | BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; | |
486 | const char *throttling_group = NULL; | |
487 | ||
488 | /* Check common options by copying from bs_opts to opts, all other options | |
489 | * stay in bs_opts for processing by bdrv_open(). */ | |
490 | id = qdict_get_try_str(bs_opts, "id"); | |
491 | opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error); | |
492 | if (error) { | |
493 | error_propagate(errp, error); | |
494 | goto err_no_opts; | |
495 | } | |
496 | ||
497 | qemu_opts_absorb_qdict(opts, bs_opts, &error); | |
498 | if (error) { | |
499 | error_propagate(errp, error); | |
500 | goto early_err; | |
501 | } | |
502 | ||
503 | if (id) { | |
504 | qdict_del(bs_opts, "id"); | |
505 | } | |
506 | ||
507 | /* extract parameters */ | |
508 | snapshot = qemu_opt_get_bool(opts, "snapshot", 0); | |
509 | ||
510 | account_invalid = qemu_opt_get_bool(opts, "stats-account-invalid", true); | |
511 | account_failed = qemu_opt_get_bool(opts, "stats-account-failed", true); | |
512 | ||
513 | writethrough = !qemu_opt_get_bool(opts, BDRV_OPT_CACHE_WB, true); | |
514 | ||
515 | id = qemu_opts_id(opts); | |
516 | ||
517 | qdict_extract_subqdict(bs_opts, &interval_dict, "stats-intervals."); | |
518 | qdict_array_split(interval_dict, &interval_list); | |
519 | ||
520 | if (qdict_size(interval_dict) != 0) { | |
521 | error_setg(errp, "Invalid option stats-intervals.%s", | |
522 | qdict_first(interval_dict)->key); | |
523 | goto early_err; | |
524 | } | |
525 | ||
526 | extract_common_blockdev_options(opts, &bdrv_flags, &throttling_group, &cfg, | |
527 | &detect_zeroes, &error); | |
528 | if (error) { | |
529 | error_propagate(errp, error); | |
530 | goto early_err; | |
531 | } | |
532 | ||
533 | if ((buf = qemu_opt_get(opts, "format")) != NULL) { | |
534 | if (is_help_option(buf)) { | |
535 | error_printf("Supported formats:"); | |
536 | bdrv_iterate_format(bdrv_format_print, NULL); | |
537 | error_printf("\n"); | |
538 | goto early_err; | |
539 | } | |
540 | ||
541 | if (qdict_haskey(bs_opts, "driver")) { | |
542 | error_setg(errp, "Cannot specify both 'driver' and 'format'"); | |
543 | goto early_err; | |
544 | } | |
545 | qdict_put(bs_opts, "driver", qstring_from_str(buf)); | |
546 | } | |
547 | ||
548 | on_write_error = BLOCKDEV_ON_ERROR_ENOSPC; | |
549 | if ((buf = qemu_opt_get(opts, "werror")) != NULL) { | |
550 | on_write_error = parse_block_error_action(buf, 0, &error); | |
551 | if (error) { | |
552 | error_propagate(errp, error); | |
553 | goto early_err; | |
554 | } | |
555 | } | |
556 | ||
557 | on_read_error = BLOCKDEV_ON_ERROR_REPORT; | |
558 | if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { | |
559 | on_read_error = parse_block_error_action(buf, 1, &error); | |
560 | if (error) { | |
561 | error_propagate(errp, error); | |
562 | goto early_err; | |
563 | } | |
564 | } | |
565 | ||
566 | if (snapshot) { | |
567 | bdrv_flags |= BDRV_O_SNAPSHOT; | |
568 | } | |
569 | ||
570 | /* init */ | |
571 | if ((!file || !*file) && !qdict_size(bs_opts)) { | |
572 | BlockBackendRootState *blk_rs; | |
573 | ||
574 | blk = blk_new(); | |
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 | QDECREF(bs_opts); | |
581 | } else { | |
582 | if (file && !*file) { | |
583 | file = NULL; | |
584 | } | |
585 | ||
586 | /* bdrv_open() defaults to the values in bdrv_flags (for compatibility | |
587 | * with other callers) rather than what we want as the real defaults. | |
588 | * Apply the defaults here instead. */ | |
589 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off"); | |
590 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off"); | |
591 | assert((bdrv_flags & BDRV_O_CACHE_MASK) == 0); | |
592 | ||
593 | if (runstate_check(RUN_STATE_INMIGRATE)) { | |
594 | bdrv_flags |= BDRV_O_INACTIVE; | |
595 | } | |
596 | ||
597 | blk = blk_new_open(file, NULL, bs_opts, bdrv_flags, errp); | |
598 | if (!blk) { | |
599 | goto err_no_bs_opts; | |
600 | } | |
601 | bs = blk_bs(blk); | |
602 | ||
603 | bs->detect_zeroes = detect_zeroes; | |
604 | ||
605 | if (bdrv_key_required(bs)) { | |
606 | autostart = 0; | |
607 | } | |
608 | ||
609 | block_acct_init(blk_get_stats(blk), account_invalid, account_failed); | |
610 | ||
611 | if (!parse_stats_intervals(blk_get_stats(blk), interval_list, errp)) { | |
612 | blk_unref(blk); | |
613 | blk = NULL; | |
614 | goto err_no_bs_opts; | |
615 | } | |
616 | } | |
617 | ||
618 | /* disk I/O throttling */ | |
619 | if (throttle_enabled(&cfg)) { | |
620 | if (!throttling_group) { | |
621 | throttling_group = id; | |
622 | } | |
623 | blk_io_limits_enable(blk, throttling_group); | |
624 | blk_set_io_limits(blk, &cfg); | |
625 | } | |
626 | ||
627 | blk_set_enable_write_cache(blk, !writethrough); | |
628 | blk_set_on_error(blk, on_read_error, on_write_error); | |
629 | ||
630 | if (!monitor_add_blk(blk, id, errp)) { | |
631 | blk_unref(blk); | |
632 | blk = NULL; | |
633 | goto err_no_bs_opts; | |
634 | } | |
635 | ||
636 | err_no_bs_opts: | |
637 | qemu_opts_del(opts); | |
638 | QDECREF(interval_dict); | |
639 | QDECREF(interval_list); | |
640 | return blk; | |
641 | ||
642 | early_err: | |
643 | qemu_opts_del(opts); | |
644 | QDECREF(interval_dict); | |
645 | QDECREF(interval_list); | |
646 | err_no_opts: | |
647 | QDECREF(bs_opts); | |
648 | return NULL; | |
649 | } | |
650 | ||
651 | static QemuOptsList qemu_root_bds_opts; | |
652 | ||
653 | /* Takes the ownership of bs_opts */ | |
654 | static BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp) | |
655 | { | |
656 | BlockDriverState *bs; | |
657 | QemuOpts *opts; | |
658 | Error *local_error = NULL; | |
659 | BlockdevDetectZeroesOptions detect_zeroes; | |
660 | int bdrv_flags = 0; | |
661 | ||
662 | opts = qemu_opts_create(&qemu_root_bds_opts, NULL, 1, errp); | |
663 | if (!opts) { | |
664 | goto fail; | |
665 | } | |
666 | ||
667 | qemu_opts_absorb_qdict(opts, bs_opts, &local_error); | |
668 | if (local_error) { | |
669 | error_propagate(errp, local_error); | |
670 | goto fail; | |
671 | } | |
672 | ||
673 | extract_common_blockdev_options(opts, &bdrv_flags, NULL, NULL, | |
674 | &detect_zeroes, &local_error); | |
675 | if (local_error) { | |
676 | error_propagate(errp, local_error); | |
677 | goto fail; | |
678 | } | |
679 | ||
680 | /* bdrv_open() defaults to the values in bdrv_flags (for compatibility | |
681 | * with other callers) rather than what we want as the real defaults. | |
682 | * Apply the defaults here instead. */ | |
683 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off"); | |
684 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off"); | |
685 | ||
686 | if (runstate_check(RUN_STATE_INMIGRATE)) { | |
687 | bdrv_flags |= BDRV_O_INACTIVE; | |
688 | } | |
689 | ||
690 | bs = bdrv_open(NULL, NULL, bs_opts, bdrv_flags, errp); | |
691 | if (!bs) { | |
692 | goto fail_no_bs_opts; | |
693 | } | |
694 | ||
695 | bs->detect_zeroes = detect_zeroes; | |
696 | ||
697 | fail_no_bs_opts: | |
698 | qemu_opts_del(opts); | |
699 | return bs; | |
700 | ||
701 | fail: | |
702 | qemu_opts_del(opts); | |
703 | QDECREF(bs_opts); | |
704 | return NULL; | |
705 | } | |
706 | ||
707 | void blockdev_close_all_bdrv_states(void) | |
708 | { | |
709 | BlockDriverState *bs, *next_bs; | |
710 | ||
711 | QTAILQ_FOREACH_SAFE(bs, &monitor_bdrv_states, monitor_list, next_bs) { | |
712 | AioContext *ctx = bdrv_get_aio_context(bs); | |
713 | ||
714 | aio_context_acquire(ctx); | |
715 | bdrv_unref(bs); | |
716 | aio_context_release(ctx); | |
717 | } | |
718 | } | |
719 | ||
720 | /* Iterates over the list of monitor-owned BlockDriverStates */ | |
721 | BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs) | |
722 | { | |
723 | return bs ? QTAILQ_NEXT(bs, monitor_list) | |
724 | : QTAILQ_FIRST(&monitor_bdrv_states); | |
725 | } | |
726 | ||
727 | static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to, | |
728 | Error **errp) | |
729 | { | |
730 | const char *value; | |
731 | ||
732 | value = qemu_opt_get(opts, from); | |
733 | if (value) { | |
734 | if (qemu_opt_find(opts, to)) { | |
735 | error_setg(errp, "'%s' and its alias '%s' can't be used at the " | |
736 | "same time", to, from); | |
737 | return; | |
738 | } | |
739 | } | |
740 | ||
741 | /* rename all items in opts */ | |
742 | while ((value = qemu_opt_get(opts, from))) { | |
743 | qemu_opt_set(opts, to, value, &error_abort); | |
744 | qemu_opt_unset(opts, from); | |
745 | } | |
746 | } | |
747 | ||
748 | QemuOptsList qemu_legacy_drive_opts = { | |
749 | .name = "drive", | |
750 | .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head), | |
751 | .desc = { | |
752 | { | |
753 | .name = "bus", | |
754 | .type = QEMU_OPT_NUMBER, | |
755 | .help = "bus number", | |
756 | },{ | |
757 | .name = "unit", | |
758 | .type = QEMU_OPT_NUMBER, | |
759 | .help = "unit number (i.e. lun for scsi)", | |
760 | },{ | |
761 | .name = "index", | |
762 | .type = QEMU_OPT_NUMBER, | |
763 | .help = "index number", | |
764 | },{ | |
765 | .name = "media", | |
766 | .type = QEMU_OPT_STRING, | |
767 | .help = "media type (disk, cdrom)", | |
768 | },{ | |
769 | .name = "if", | |
770 | .type = QEMU_OPT_STRING, | |
771 | .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)", | |
772 | },{ | |
773 | .name = "cyls", | |
774 | .type = QEMU_OPT_NUMBER, | |
775 | .help = "number of cylinders (ide disk geometry)", | |
776 | },{ | |
777 | .name = "heads", | |
778 | .type = QEMU_OPT_NUMBER, | |
779 | .help = "number of heads (ide disk geometry)", | |
780 | },{ | |
781 | .name = "secs", | |
782 | .type = QEMU_OPT_NUMBER, | |
783 | .help = "number of sectors (ide disk geometry)", | |
784 | },{ | |
785 | .name = "trans", | |
786 | .type = QEMU_OPT_STRING, | |
787 | .help = "chs translation (auto, lba, none)", | |
788 | },{ | |
789 | .name = "boot", | |
790 | .type = QEMU_OPT_BOOL, | |
791 | .help = "(deprecated, ignored)", | |
792 | },{ | |
793 | .name = "addr", | |
794 | .type = QEMU_OPT_STRING, | |
795 | .help = "pci address (virtio only)", | |
796 | },{ | |
797 | .name = "serial", | |
798 | .type = QEMU_OPT_STRING, | |
799 | .help = "disk serial number", | |
800 | },{ | |
801 | .name = "file", | |
802 | .type = QEMU_OPT_STRING, | |
803 | .help = "file name", | |
804 | }, | |
805 | ||
806 | /* Options that are passed on, but have special semantics with -drive */ | |
807 | { | |
808 | .name = "read-only", | |
809 | .type = QEMU_OPT_BOOL, | |
810 | .help = "open drive file as read-only", | |
811 | },{ | |
812 | .name = "rerror", | |
813 | .type = QEMU_OPT_STRING, | |
814 | .help = "read error action", | |
815 | },{ | |
816 | .name = "werror", | |
817 | .type = QEMU_OPT_STRING, | |
818 | .help = "write error action", | |
819 | },{ | |
820 | .name = "copy-on-read", | |
821 | .type = QEMU_OPT_BOOL, | |
822 | .help = "copy read data from backing file into image file", | |
823 | }, | |
824 | ||
825 | { /* end of list */ } | |
826 | }, | |
827 | }; | |
828 | ||
829 | DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type) | |
830 | { | |
831 | const char *value; | |
832 | BlockBackend *blk; | |
833 | DriveInfo *dinfo = NULL; | |
834 | QDict *bs_opts; | |
835 | QemuOpts *legacy_opts; | |
836 | DriveMediaType media = MEDIA_DISK; | |
837 | BlockInterfaceType type; | |
838 | int cyls, heads, secs, translation; | |
839 | int max_devs, bus_id, unit_id, index; | |
840 | const char *devaddr; | |
841 | const char *werror, *rerror; | |
842 | bool read_only = false; | |
843 | bool copy_on_read; | |
844 | const char *serial; | |
845 | const char *filename; | |
846 | Error *local_err = NULL; | |
847 | int i; | |
848 | ||
849 | /* Change legacy command line options into QMP ones */ | |
850 | static const struct { | |
851 | const char *from; | |
852 | const char *to; | |
853 | } opt_renames[] = { | |
854 | { "iops", "throttling.iops-total" }, | |
855 | { "iops_rd", "throttling.iops-read" }, | |
856 | { "iops_wr", "throttling.iops-write" }, | |
857 | ||
858 | { "bps", "throttling.bps-total" }, | |
859 | { "bps_rd", "throttling.bps-read" }, | |
860 | { "bps_wr", "throttling.bps-write" }, | |
861 | ||
862 | { "iops_max", "throttling.iops-total-max" }, | |
863 | { "iops_rd_max", "throttling.iops-read-max" }, | |
864 | { "iops_wr_max", "throttling.iops-write-max" }, | |
865 | ||
866 | { "bps_max", "throttling.bps-total-max" }, | |
867 | { "bps_rd_max", "throttling.bps-read-max" }, | |
868 | { "bps_wr_max", "throttling.bps-write-max" }, | |
869 | ||
870 | { "iops_size", "throttling.iops-size" }, | |
871 | ||
872 | { "group", "throttling.group" }, | |
873 | ||
874 | { "readonly", "read-only" }, | |
875 | }; | |
876 | ||
877 | for (i = 0; i < ARRAY_SIZE(opt_renames); i++) { | |
878 | qemu_opt_rename(all_opts, opt_renames[i].from, opt_renames[i].to, | |
879 | &local_err); | |
880 | if (local_err) { | |
881 | error_report_err(local_err); | |
882 | return NULL; | |
883 | } | |
884 | } | |
885 | ||
886 | value = qemu_opt_get(all_opts, "cache"); | |
887 | if (value) { | |
888 | int flags = 0; | |
889 | bool writethrough; | |
890 | ||
891 | if (bdrv_parse_cache_mode(value, &flags, &writethrough) != 0) { | |
892 | error_report("invalid cache option"); | |
893 | return NULL; | |
894 | } | |
895 | ||
896 | /* Specific options take precedence */ | |
897 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_WB)) { | |
898 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_WB, | |
899 | !writethrough, &error_abort); | |
900 | } | |
901 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_DIRECT)) { | |
902 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_DIRECT, | |
903 | !!(flags & BDRV_O_NOCACHE), &error_abort); | |
904 | } | |
905 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_NO_FLUSH)) { | |
906 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_NO_FLUSH, | |
907 | !!(flags & BDRV_O_NO_FLUSH), &error_abort); | |
908 | } | |
909 | qemu_opt_unset(all_opts, "cache"); | |
910 | } | |
911 | ||
912 | /* Get a QDict for processing the options */ | |
913 | bs_opts = qdict_new(); | |
914 | qemu_opts_to_qdict(all_opts, bs_opts); | |
915 | ||
916 | legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0, | |
917 | &error_abort); | |
918 | qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err); | |
919 | if (local_err) { | |
920 | error_report_err(local_err); | |
921 | goto fail; | |
922 | } | |
923 | ||
924 | /* Deprecated option boot=[on|off] */ | |
925 | if (qemu_opt_get(legacy_opts, "boot") != NULL) { | |
926 | fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be " | |
927 | "ignored. Future versions will reject this parameter. Please " | |
928 | "update your scripts.\n"); | |
929 | } | |
930 | ||
931 | /* Media type */ | |
932 | value = qemu_opt_get(legacy_opts, "media"); | |
933 | if (value) { | |
934 | if (!strcmp(value, "disk")) { | |
935 | media = MEDIA_DISK; | |
936 | } else if (!strcmp(value, "cdrom")) { | |
937 | media = MEDIA_CDROM; | |
938 | read_only = true; | |
939 | } else { | |
940 | error_report("'%s' invalid media", value); | |
941 | goto fail; | |
942 | } | |
943 | } | |
944 | ||
945 | /* copy-on-read is disabled with a warning for read-only devices */ | |
946 | read_only |= qemu_opt_get_bool(legacy_opts, "read-only", false); | |
947 | copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false); | |
948 | ||
949 | if (read_only && copy_on_read) { | |
950 | error_report("warning: disabling copy-on-read on read-only drive"); | |
951 | copy_on_read = false; | |
952 | } | |
953 | ||
954 | qdict_put(bs_opts, "read-only", | |
955 | qstring_from_str(read_only ? "on" : "off")); | |
956 | qdict_put(bs_opts, "copy-on-read", | |
957 | qstring_from_str(copy_on_read ? "on" :"off")); | |
958 | ||
959 | /* Controller type */ | |
960 | value = qemu_opt_get(legacy_opts, "if"); | |
961 | if (value) { | |
962 | for (type = 0; | |
963 | type < IF_COUNT && strcmp(value, if_name[type]); | |
964 | type++) { | |
965 | } | |
966 | if (type == IF_COUNT) { | |
967 | error_report("unsupported bus type '%s'", value); | |
968 | goto fail; | |
969 | } | |
970 | } else { | |
971 | type = block_default_type; | |
972 | } | |
973 | ||
974 | /* Geometry */ | |
975 | cyls = qemu_opt_get_number(legacy_opts, "cyls", 0); | |
976 | heads = qemu_opt_get_number(legacy_opts, "heads", 0); | |
977 | secs = qemu_opt_get_number(legacy_opts, "secs", 0); | |
978 | ||
979 | if (cyls || heads || secs) { | |
980 | if (cyls < 1) { | |
981 | error_report("invalid physical cyls number"); | |
982 | goto fail; | |
983 | } | |
984 | if (heads < 1) { | |
985 | error_report("invalid physical heads number"); | |
986 | goto fail; | |
987 | } | |
988 | if (secs < 1) { | |
989 | error_report("invalid physical secs number"); | |
990 | goto fail; | |
991 | } | |
992 | } | |
993 | ||
994 | translation = BIOS_ATA_TRANSLATION_AUTO; | |
995 | value = qemu_opt_get(legacy_opts, "trans"); | |
996 | if (value != NULL) { | |
997 | if (!cyls) { | |
998 | error_report("'%s' trans must be used with cyls, heads and secs", | |
999 | value); | |
1000 | goto fail; | |
1001 | } | |
1002 | if (!strcmp(value, "none")) { | |
1003 | translation = BIOS_ATA_TRANSLATION_NONE; | |
1004 | } else if (!strcmp(value, "lba")) { | |
1005 | translation = BIOS_ATA_TRANSLATION_LBA; | |
1006 | } else if (!strcmp(value, "large")) { | |
1007 | translation = BIOS_ATA_TRANSLATION_LARGE; | |
1008 | } else if (!strcmp(value, "rechs")) { | |
1009 | translation = BIOS_ATA_TRANSLATION_RECHS; | |
1010 | } else if (!strcmp(value, "auto")) { | |
1011 | translation = BIOS_ATA_TRANSLATION_AUTO; | |
1012 | } else { | |
1013 | error_report("'%s' invalid translation type", value); | |
1014 | goto fail; | |
1015 | } | |
1016 | } | |
1017 | ||
1018 | if (media == MEDIA_CDROM) { | |
1019 | if (cyls || secs || heads) { | |
1020 | error_report("CHS can't be set with media=cdrom"); | |
1021 | goto fail; | |
1022 | } | |
1023 | } | |
1024 | ||
1025 | /* Device address specified by bus/unit or index. | |
1026 | * If none was specified, try to find the first free one. */ | |
1027 | bus_id = qemu_opt_get_number(legacy_opts, "bus", 0); | |
1028 | unit_id = qemu_opt_get_number(legacy_opts, "unit", -1); | |
1029 | index = qemu_opt_get_number(legacy_opts, "index", -1); | |
1030 | ||
1031 | max_devs = if_max_devs[type]; | |
1032 | ||
1033 | if (index != -1) { | |
1034 | if (bus_id != 0 || unit_id != -1) { | |
1035 | error_report("index cannot be used with bus and unit"); | |
1036 | goto fail; | |
1037 | } | |
1038 | bus_id = drive_index_to_bus_id(type, index); | |
1039 | unit_id = drive_index_to_unit_id(type, index); | |
1040 | } | |
1041 | ||
1042 | if (unit_id == -1) { | |
1043 | unit_id = 0; | |
1044 | while (drive_get(type, bus_id, unit_id) != NULL) { | |
1045 | unit_id++; | |
1046 | if (max_devs && unit_id >= max_devs) { | |
1047 | unit_id -= max_devs; | |
1048 | bus_id++; | |
1049 | } | |
1050 | } | |
1051 | } | |
1052 | ||
1053 | if (max_devs && unit_id >= max_devs) { | |
1054 | error_report("unit %d too big (max is %d)", unit_id, max_devs - 1); | |
1055 | goto fail; | |
1056 | } | |
1057 | ||
1058 | if (drive_get(type, bus_id, unit_id) != NULL) { | |
1059 | error_report("drive with bus=%d, unit=%d (index=%d) exists", | |
1060 | bus_id, unit_id, index); | |
1061 | goto fail; | |
1062 | } | |
1063 | ||
1064 | /* Serial number */ | |
1065 | serial = qemu_opt_get(legacy_opts, "serial"); | |
1066 | ||
1067 | /* no id supplied -> create one */ | |
1068 | if (qemu_opts_id(all_opts) == NULL) { | |
1069 | char *new_id; | |
1070 | const char *mediastr = ""; | |
1071 | if (type == IF_IDE || type == IF_SCSI) { | |
1072 | mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; | |
1073 | } | |
1074 | if (max_devs) { | |
1075 | new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id, | |
1076 | mediastr, unit_id); | |
1077 | } else { | |
1078 | new_id = g_strdup_printf("%s%s%i", if_name[type], | |
1079 | mediastr, unit_id); | |
1080 | } | |
1081 | qdict_put(bs_opts, "id", qstring_from_str(new_id)); | |
1082 | g_free(new_id); | |
1083 | } | |
1084 | ||
1085 | /* Add virtio block device */ | |
1086 | devaddr = qemu_opt_get(legacy_opts, "addr"); | |
1087 | if (devaddr && type != IF_VIRTIO) { | |
1088 | error_report("addr is not supported by this bus type"); | |
1089 | goto fail; | |
1090 | } | |
1091 | ||
1092 | if (type == IF_VIRTIO) { | |
1093 | QemuOpts *devopts; | |
1094 | devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0, | |
1095 | &error_abort); | |
1096 | if (arch_type == QEMU_ARCH_S390X) { | |
1097 | qemu_opt_set(devopts, "driver", "virtio-blk-ccw", &error_abort); | |
1098 | } else { | |
1099 | qemu_opt_set(devopts, "driver", "virtio-blk-pci", &error_abort); | |
1100 | } | |
1101 | qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"), | |
1102 | &error_abort); | |
1103 | if (devaddr) { | |
1104 | qemu_opt_set(devopts, "addr", devaddr, &error_abort); | |
1105 | } | |
1106 | } | |
1107 | ||
1108 | filename = qemu_opt_get(legacy_opts, "file"); | |
1109 | ||
1110 | /* Check werror/rerror compatibility with if=... */ | |
1111 | werror = qemu_opt_get(legacy_opts, "werror"); | |
1112 | if (werror != NULL) { | |
1113 | if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && | |
1114 | type != IF_NONE) { | |
1115 | error_report("werror is not supported by this bus type"); | |
1116 | goto fail; | |
1117 | } | |
1118 | qdict_put(bs_opts, "werror", qstring_from_str(werror)); | |
1119 | } | |
1120 | ||
1121 | rerror = qemu_opt_get(legacy_opts, "rerror"); | |
1122 | if (rerror != NULL) { | |
1123 | if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && | |
1124 | type != IF_NONE) { | |
1125 | error_report("rerror is not supported by this bus type"); | |
1126 | goto fail; | |
1127 | } | |
1128 | qdict_put(bs_opts, "rerror", qstring_from_str(rerror)); | |
1129 | } | |
1130 | ||
1131 | /* Actual block device init: Functionality shared with blockdev-add */ | |
1132 | blk = blockdev_init(filename, bs_opts, &local_err); | |
1133 | bs_opts = NULL; | |
1134 | if (!blk) { | |
1135 | if (local_err) { | |
1136 | error_report_err(local_err); | |
1137 | } | |
1138 | goto fail; | |
1139 | } else { | |
1140 | assert(!local_err); | |
1141 | } | |
1142 | ||
1143 | /* Create legacy DriveInfo */ | |
1144 | dinfo = g_malloc0(sizeof(*dinfo)); | |
1145 | dinfo->opts = all_opts; | |
1146 | ||
1147 | dinfo->cyls = cyls; | |
1148 | dinfo->heads = heads; | |
1149 | dinfo->secs = secs; | |
1150 | dinfo->trans = translation; | |
1151 | ||
1152 | dinfo->type = type; | |
1153 | dinfo->bus = bus_id; | |
1154 | dinfo->unit = unit_id; | |
1155 | dinfo->devaddr = devaddr; | |
1156 | dinfo->serial = g_strdup(serial); | |
1157 | ||
1158 | blk_set_legacy_dinfo(blk, dinfo); | |
1159 | ||
1160 | switch(type) { | |
1161 | case IF_IDE: | |
1162 | case IF_SCSI: | |
1163 | case IF_XEN: | |
1164 | case IF_NONE: | |
1165 | dinfo->media_cd = media == MEDIA_CDROM; | |
1166 | break; | |
1167 | default: | |
1168 | break; | |
1169 | } | |
1170 | ||
1171 | fail: | |
1172 | qemu_opts_del(legacy_opts); | |
1173 | QDECREF(bs_opts); | |
1174 | return dinfo; | |
1175 | } | |
1176 | ||
1177 | void hmp_commit(Monitor *mon, const QDict *qdict) | |
1178 | { | |
1179 | const char *device = qdict_get_str(qdict, "device"); | |
1180 | BlockBackend *blk; | |
1181 | int ret; | |
1182 | ||
1183 | if (!strcmp(device, "all")) { | |
1184 | ret = blk_commit_all(); | |
1185 | } else { | |
1186 | BlockDriverState *bs; | |
1187 | AioContext *aio_context; | |
1188 | ||
1189 | blk = blk_by_name(device); | |
1190 | if (!blk) { | |
1191 | monitor_printf(mon, "Device '%s' not found\n", device); | |
1192 | return; | |
1193 | } | |
1194 | if (!blk_is_available(blk)) { | |
1195 | monitor_printf(mon, "Device '%s' has no medium\n", device); | |
1196 | return; | |
1197 | } | |
1198 | ||
1199 | bs = blk_bs(blk); | |
1200 | aio_context = bdrv_get_aio_context(bs); | |
1201 | aio_context_acquire(aio_context); | |
1202 | ||
1203 | ret = bdrv_commit(bs); | |
1204 | ||
1205 | aio_context_release(aio_context); | |
1206 | } | |
1207 | if (ret < 0) { | |
1208 | monitor_printf(mon, "'commit' error for '%s': %s\n", device, | |
1209 | strerror(-ret)); | |
1210 | } | |
1211 | } | |
1212 | ||
1213 | static void blockdev_do_action(TransactionAction *action, Error **errp) | |
1214 | { | |
1215 | TransactionActionList list; | |
1216 | ||
1217 | list.value = action; | |
1218 | list.next = NULL; | |
1219 | qmp_transaction(&list, false, NULL, errp); | |
1220 | } | |
1221 | ||
1222 | void qmp_blockdev_snapshot_sync(bool has_device, const char *device, | |
1223 | bool has_node_name, const char *node_name, | |
1224 | const char *snapshot_file, | |
1225 | bool has_snapshot_node_name, | |
1226 | const char *snapshot_node_name, | |
1227 | bool has_format, const char *format, | |
1228 | bool has_mode, NewImageMode mode, Error **errp) | |
1229 | { | |
1230 | BlockdevSnapshotSync snapshot = { | |
1231 | .has_device = has_device, | |
1232 | .device = (char *) device, | |
1233 | .has_node_name = has_node_name, | |
1234 | .node_name = (char *) node_name, | |
1235 | .snapshot_file = (char *) snapshot_file, | |
1236 | .has_snapshot_node_name = has_snapshot_node_name, | |
1237 | .snapshot_node_name = (char *) snapshot_node_name, | |
1238 | .has_format = has_format, | |
1239 | .format = (char *) format, | |
1240 | .has_mode = has_mode, | |
1241 | .mode = mode, | |
1242 | }; | |
1243 | TransactionAction action = { | |
1244 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, | |
1245 | .u.blockdev_snapshot_sync.data = &snapshot, | |
1246 | }; | |
1247 | blockdev_do_action(&action, errp); | |
1248 | } | |
1249 | ||
1250 | void qmp_blockdev_snapshot(const char *node, const char *overlay, | |
1251 | Error **errp) | |
1252 | { | |
1253 | BlockdevSnapshot snapshot_data = { | |
1254 | .node = (char *) node, | |
1255 | .overlay = (char *) overlay | |
1256 | }; | |
1257 | TransactionAction action = { | |
1258 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT, | |
1259 | .u.blockdev_snapshot.data = &snapshot_data, | |
1260 | }; | |
1261 | blockdev_do_action(&action, errp); | |
1262 | } | |
1263 | ||
1264 | void qmp_blockdev_snapshot_internal_sync(const char *device, | |
1265 | const char *name, | |
1266 | Error **errp) | |
1267 | { | |
1268 | BlockdevSnapshotInternal snapshot = { | |
1269 | .device = (char *) device, | |
1270 | .name = (char *) name | |
1271 | }; | |
1272 | TransactionAction action = { | |
1273 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC, | |
1274 | .u.blockdev_snapshot_internal_sync.data = &snapshot, | |
1275 | }; | |
1276 | blockdev_do_action(&action, errp); | |
1277 | } | |
1278 | ||
1279 | SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device, | |
1280 | bool has_id, | |
1281 | const char *id, | |
1282 | bool has_name, | |
1283 | const char *name, | |
1284 | Error **errp) | |
1285 | { | |
1286 | BlockDriverState *bs; | |
1287 | BlockBackend *blk; | |
1288 | AioContext *aio_context; | |
1289 | QEMUSnapshotInfo sn; | |
1290 | Error *local_err = NULL; | |
1291 | SnapshotInfo *info = NULL; | |
1292 | int ret; | |
1293 | ||
1294 | blk = blk_by_name(device); | |
1295 | if (!blk) { | |
1296 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
1297 | "Device '%s' not found", device); | |
1298 | return NULL; | |
1299 | } | |
1300 | ||
1301 | aio_context = blk_get_aio_context(blk); | |
1302 | aio_context_acquire(aio_context); | |
1303 | ||
1304 | if (!has_id) { | |
1305 | id = NULL; | |
1306 | } | |
1307 | ||
1308 | if (!has_name) { | |
1309 | name = NULL; | |
1310 | } | |
1311 | ||
1312 | if (!id && !name) { | |
1313 | error_setg(errp, "Name or id must be provided"); | |
1314 | goto out_aio_context; | |
1315 | } | |
1316 | ||
1317 | if (!blk_is_available(blk)) { | |
1318 | error_setg(errp, "Device '%s' has no medium", device); | |
1319 | goto out_aio_context; | |
1320 | } | |
1321 | bs = blk_bs(blk); | |
1322 | ||
1323 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, errp)) { | |
1324 | goto out_aio_context; | |
1325 | } | |
1326 | ||
1327 | ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err); | |
1328 | if (local_err) { | |
1329 | error_propagate(errp, local_err); | |
1330 | goto out_aio_context; | |
1331 | } | |
1332 | if (!ret) { | |
1333 | error_setg(errp, | |
1334 | "Snapshot with id '%s' and name '%s' does not exist on " | |
1335 | "device '%s'", | |
1336 | STR_OR_NULL(id), STR_OR_NULL(name), device); | |
1337 | goto out_aio_context; | |
1338 | } | |
1339 | ||
1340 | bdrv_snapshot_delete(bs, id, name, &local_err); | |
1341 | if (local_err) { | |
1342 | error_propagate(errp, local_err); | |
1343 | goto out_aio_context; | |
1344 | } | |
1345 | ||
1346 | aio_context_release(aio_context); | |
1347 | ||
1348 | info = g_new0(SnapshotInfo, 1); | |
1349 | info->id = g_strdup(sn.id_str); | |
1350 | info->name = g_strdup(sn.name); | |
1351 | info->date_nsec = sn.date_nsec; | |
1352 | info->date_sec = sn.date_sec; | |
1353 | info->vm_state_size = sn.vm_state_size; | |
1354 | info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000; | |
1355 | info->vm_clock_sec = sn.vm_clock_nsec / 1000000000; | |
1356 | ||
1357 | return info; | |
1358 | ||
1359 | out_aio_context: | |
1360 | aio_context_release(aio_context); | |
1361 | return NULL; | |
1362 | } | |
1363 | ||
1364 | /** | |
1365 | * block_dirty_bitmap_lookup: | |
1366 | * Return a dirty bitmap (if present), after validating | |
1367 | * the node reference and bitmap names. | |
1368 | * | |
1369 | * @node: The name of the BDS node to search for bitmaps | |
1370 | * @name: The name of the bitmap to search for | |
1371 | * @pbs: Output pointer for BDS lookup, if desired. Can be NULL. | |
1372 | * @paio: Output pointer for aio_context acquisition, if desired. Can be NULL. | |
1373 | * @errp: Output pointer for error information. Can be NULL. | |
1374 | * | |
1375 | * @return: A bitmap object on success, or NULL on failure. | |
1376 | */ | |
1377 | static BdrvDirtyBitmap *block_dirty_bitmap_lookup(const char *node, | |
1378 | const char *name, | |
1379 | BlockDriverState **pbs, | |
1380 | AioContext **paio, | |
1381 | Error **errp) | |
1382 | { | |
1383 | BlockDriverState *bs; | |
1384 | BdrvDirtyBitmap *bitmap; | |
1385 | AioContext *aio_context; | |
1386 | ||
1387 | if (!node) { | |
1388 | error_setg(errp, "Node cannot be NULL"); | |
1389 | return NULL; | |
1390 | } | |
1391 | if (!name) { | |
1392 | error_setg(errp, "Bitmap name cannot be NULL"); | |
1393 | return NULL; | |
1394 | } | |
1395 | bs = bdrv_lookup_bs(node, node, NULL); | |
1396 | if (!bs) { | |
1397 | error_setg(errp, "Node '%s' not found", node); | |
1398 | return NULL; | |
1399 | } | |
1400 | ||
1401 | aio_context = bdrv_get_aio_context(bs); | |
1402 | aio_context_acquire(aio_context); | |
1403 | ||
1404 | bitmap = bdrv_find_dirty_bitmap(bs, name); | |
1405 | if (!bitmap) { | |
1406 | error_setg(errp, "Dirty bitmap '%s' not found", name); | |
1407 | goto fail; | |
1408 | } | |
1409 | ||
1410 | if (pbs) { | |
1411 | *pbs = bs; | |
1412 | } | |
1413 | if (paio) { | |
1414 | *paio = aio_context; | |
1415 | } else { | |
1416 | aio_context_release(aio_context); | |
1417 | } | |
1418 | ||
1419 | return bitmap; | |
1420 | ||
1421 | fail: | |
1422 | aio_context_release(aio_context); | |
1423 | return NULL; | |
1424 | } | |
1425 | ||
1426 | /* New and old BlockDriverState structs for atomic group operations */ | |
1427 | ||
1428 | typedef struct BlkActionState BlkActionState; | |
1429 | ||
1430 | /** | |
1431 | * BlkActionOps: | |
1432 | * Table of operations that define an Action. | |
1433 | * | |
1434 | * @instance_size: Size of state struct, in bytes. | |
1435 | * @prepare: Prepare the work, must NOT be NULL. | |
1436 | * @commit: Commit the changes, can be NULL. | |
1437 | * @abort: Abort the changes on fail, can be NULL. | |
1438 | * @clean: Clean up resources after all transaction actions have called | |
1439 | * commit() or abort(). Can be NULL. | |
1440 | * | |
1441 | * Only prepare() may fail. In a single transaction, only one of commit() or | |
1442 | * abort() will be called. clean() will always be called if it is present. | |
1443 | */ | |
1444 | typedef struct BlkActionOps { | |
1445 | size_t instance_size; | |
1446 | void (*prepare)(BlkActionState *common, Error **errp); | |
1447 | void (*commit)(BlkActionState *common); | |
1448 | void (*abort)(BlkActionState *common); | |
1449 | void (*clean)(BlkActionState *common); | |
1450 | } BlkActionOps; | |
1451 | ||
1452 | /** | |
1453 | * BlkActionState: | |
1454 | * Describes one Action's state within a Transaction. | |
1455 | * | |
1456 | * @action: QAPI-defined enum identifying which Action to perform. | |
1457 | * @ops: Table of ActionOps this Action can perform. | |
1458 | * @block_job_txn: Transaction which this action belongs to. | |
1459 | * @entry: List membership for all Actions in this Transaction. | |
1460 | * | |
1461 | * This structure must be arranged as first member in a subclassed type, | |
1462 | * assuming that the compiler will also arrange it to the same offsets as the | |
1463 | * base class. | |
1464 | */ | |
1465 | struct BlkActionState { | |
1466 | TransactionAction *action; | |
1467 | const BlkActionOps *ops; | |
1468 | BlockJobTxn *block_job_txn; | |
1469 | TransactionProperties *txn_props; | |
1470 | QSIMPLEQ_ENTRY(BlkActionState) entry; | |
1471 | }; | |
1472 | ||
1473 | /* internal snapshot private data */ | |
1474 | typedef struct InternalSnapshotState { | |
1475 | BlkActionState common; | |
1476 | BlockDriverState *bs; | |
1477 | AioContext *aio_context; | |
1478 | QEMUSnapshotInfo sn; | |
1479 | bool created; | |
1480 | } InternalSnapshotState; | |
1481 | ||
1482 | ||
1483 | static int action_check_completion_mode(BlkActionState *s, Error **errp) | |
1484 | { | |
1485 | if (s->txn_props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) { | |
1486 | error_setg(errp, | |
1487 | "Action '%s' does not support Transaction property " | |
1488 | "completion-mode = %s", | |
1489 | TransactionActionKind_lookup[s->action->type], | |
1490 | ActionCompletionMode_lookup[s->txn_props->completion_mode]); | |
1491 | return -1; | |
1492 | } | |
1493 | return 0; | |
1494 | } | |
1495 | ||
1496 | static void internal_snapshot_prepare(BlkActionState *common, | |
1497 | Error **errp) | |
1498 | { | |
1499 | Error *local_err = NULL; | |
1500 | const char *device; | |
1501 | const char *name; | |
1502 | BlockBackend *blk; | |
1503 | BlockDriverState *bs; | |
1504 | QEMUSnapshotInfo old_sn, *sn; | |
1505 | bool ret; | |
1506 | qemu_timeval tv; | |
1507 | BlockdevSnapshotInternal *internal; | |
1508 | InternalSnapshotState *state; | |
1509 | int ret1; | |
1510 | ||
1511 | g_assert(common->action->type == | |
1512 | TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC); | |
1513 | internal = common->action->u.blockdev_snapshot_internal_sync.data; | |
1514 | state = DO_UPCAST(InternalSnapshotState, common, common); | |
1515 | ||
1516 | /* 1. parse input */ | |
1517 | device = internal->device; | |
1518 | name = internal->name; | |
1519 | ||
1520 | /* 2. check for validation */ | |
1521 | if (action_check_completion_mode(common, errp) < 0) { | |
1522 | return; | |
1523 | } | |
1524 | ||
1525 | blk = blk_by_name(device); | |
1526 | if (!blk) { | |
1527 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
1528 | "Device '%s' not found", device); | |
1529 | return; | |
1530 | } | |
1531 | ||
1532 | /* AioContext is released in .clean() */ | |
1533 | state->aio_context = blk_get_aio_context(blk); | |
1534 | aio_context_acquire(state->aio_context); | |
1535 | ||
1536 | if (!blk_is_available(blk)) { | |
1537 | error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
1538 | return; | |
1539 | } | |
1540 | bs = blk_bs(blk); | |
1541 | ||
1542 | state->bs = bs; | |
1543 | bdrv_drained_begin(bs); | |
1544 | ||
1545 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, errp)) { | |
1546 | return; | |
1547 | } | |
1548 | ||
1549 | if (bdrv_is_read_only(bs)) { | |
1550 | error_setg(errp, "Device '%s' is read only", device); | |
1551 | return; | |
1552 | } | |
1553 | ||
1554 | if (!bdrv_can_snapshot(bs)) { | |
1555 | error_setg(errp, "Block format '%s' used by device '%s' " | |
1556 | "does not support internal snapshots", | |
1557 | bs->drv->format_name, device); | |
1558 | return; | |
1559 | } | |
1560 | ||
1561 | if (!strlen(name)) { | |
1562 | error_setg(errp, "Name is empty"); | |
1563 | return; | |
1564 | } | |
1565 | ||
1566 | /* check whether a snapshot with name exist */ | |
1567 | ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn, | |
1568 | &local_err); | |
1569 | if (local_err) { | |
1570 | error_propagate(errp, local_err); | |
1571 | return; | |
1572 | } else if (ret) { | |
1573 | error_setg(errp, | |
1574 | "Snapshot with name '%s' already exists on device '%s'", | |
1575 | name, device); | |
1576 | return; | |
1577 | } | |
1578 | ||
1579 | /* 3. take the snapshot */ | |
1580 | sn = &state->sn; | |
1581 | pstrcpy(sn->name, sizeof(sn->name), name); | |
1582 | qemu_gettimeofday(&tv); | |
1583 | sn->date_sec = tv.tv_sec; | |
1584 | sn->date_nsec = tv.tv_usec * 1000; | |
1585 | sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); | |
1586 | ||
1587 | ret1 = bdrv_snapshot_create(bs, sn); | |
1588 | if (ret1 < 0) { | |
1589 | error_setg_errno(errp, -ret1, | |
1590 | "Failed to create snapshot '%s' on device '%s'", | |
1591 | name, device); | |
1592 | return; | |
1593 | } | |
1594 | ||
1595 | /* 4. succeed, mark a snapshot is created */ | |
1596 | state->created = true; | |
1597 | } | |
1598 | ||
1599 | static void internal_snapshot_abort(BlkActionState *common) | |
1600 | { | |
1601 | InternalSnapshotState *state = | |
1602 | DO_UPCAST(InternalSnapshotState, common, common); | |
1603 | BlockDriverState *bs = state->bs; | |
1604 | QEMUSnapshotInfo *sn = &state->sn; | |
1605 | Error *local_error = NULL; | |
1606 | ||
1607 | if (!state->created) { | |
1608 | return; | |
1609 | } | |
1610 | ||
1611 | if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) { | |
1612 | error_reportf_err(local_error, | |
1613 | "Failed to delete snapshot with id '%s' and " | |
1614 | "name '%s' on device '%s' in abort: ", | |
1615 | sn->id_str, sn->name, | |
1616 | bdrv_get_device_name(bs)); | |
1617 | } | |
1618 | } | |
1619 | ||
1620 | static void internal_snapshot_clean(BlkActionState *common) | |
1621 | { | |
1622 | InternalSnapshotState *state = DO_UPCAST(InternalSnapshotState, | |
1623 | common, common); | |
1624 | ||
1625 | if (state->aio_context) { | |
1626 | if (state->bs) { | |
1627 | bdrv_drained_end(state->bs); | |
1628 | } | |
1629 | aio_context_release(state->aio_context); | |
1630 | } | |
1631 | } | |
1632 | ||
1633 | /* external snapshot private data */ | |
1634 | typedef struct ExternalSnapshotState { | |
1635 | BlkActionState common; | |
1636 | BlockDriverState *old_bs; | |
1637 | BlockDriverState *new_bs; | |
1638 | AioContext *aio_context; | |
1639 | } ExternalSnapshotState; | |
1640 | ||
1641 | static void external_snapshot_prepare(BlkActionState *common, | |
1642 | Error **errp) | |
1643 | { | |
1644 | int flags = 0; | |
1645 | QDict *options = NULL; | |
1646 | Error *local_err = NULL; | |
1647 | /* Device and node name of the image to generate the snapshot from */ | |
1648 | const char *device; | |
1649 | const char *node_name; | |
1650 | /* Reference to the new image (for 'blockdev-snapshot') */ | |
1651 | const char *snapshot_ref; | |
1652 | /* File name of the new image (for 'blockdev-snapshot-sync') */ | |
1653 | const char *new_image_file; | |
1654 | ExternalSnapshotState *state = | |
1655 | DO_UPCAST(ExternalSnapshotState, common, common); | |
1656 | TransactionAction *action = common->action; | |
1657 | ||
1658 | /* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar | |
1659 | * purpose but a different set of parameters */ | |
1660 | switch (action->type) { | |
1661 | case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT: | |
1662 | { | |
1663 | BlockdevSnapshot *s = action->u.blockdev_snapshot.data; | |
1664 | device = s->node; | |
1665 | node_name = s->node; | |
1666 | new_image_file = NULL; | |
1667 | snapshot_ref = s->overlay; | |
1668 | } | |
1669 | break; | |
1670 | case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC: | |
1671 | { | |
1672 | BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data; | |
1673 | device = s->has_device ? s->device : NULL; | |
1674 | node_name = s->has_node_name ? s->node_name : NULL; | |
1675 | new_image_file = s->snapshot_file; | |
1676 | snapshot_ref = NULL; | |
1677 | } | |
1678 | break; | |
1679 | default: | |
1680 | g_assert_not_reached(); | |
1681 | } | |
1682 | ||
1683 | /* start processing */ | |
1684 | if (action_check_completion_mode(common, errp) < 0) { | |
1685 | return; | |
1686 | } | |
1687 | ||
1688 | state->old_bs = bdrv_lookup_bs(device, node_name, errp); | |
1689 | if (!state->old_bs) { | |
1690 | return; | |
1691 | } | |
1692 | ||
1693 | /* Acquire AioContext now so any threads operating on old_bs stop */ | |
1694 | state->aio_context = bdrv_get_aio_context(state->old_bs); | |
1695 | aio_context_acquire(state->aio_context); | |
1696 | bdrv_drained_begin(state->old_bs); | |
1697 | ||
1698 | if (!bdrv_is_inserted(state->old_bs)) { | |
1699 | error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
1700 | return; | |
1701 | } | |
1702 | ||
1703 | if (bdrv_op_is_blocked(state->old_bs, | |
1704 | BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, errp)) { | |
1705 | return; | |
1706 | } | |
1707 | ||
1708 | if (!bdrv_is_read_only(state->old_bs)) { | |
1709 | if (bdrv_flush(state->old_bs)) { | |
1710 | error_setg(errp, QERR_IO_ERROR); | |
1711 | return; | |
1712 | } | |
1713 | } | |
1714 | ||
1715 | if (!bdrv_is_first_non_filter(state->old_bs)) { | |
1716 | error_setg(errp, QERR_FEATURE_DISABLED, "snapshot"); | |
1717 | return; | |
1718 | } | |
1719 | ||
1720 | if (action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC) { | |
1721 | BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data; | |
1722 | const char *format = s->has_format ? s->format : "qcow2"; | |
1723 | enum NewImageMode mode; | |
1724 | const char *snapshot_node_name = | |
1725 | s->has_snapshot_node_name ? s->snapshot_node_name : NULL; | |
1726 | ||
1727 | if (node_name && !snapshot_node_name) { | |
1728 | error_setg(errp, "New snapshot node name missing"); | |
1729 | return; | |
1730 | } | |
1731 | ||
1732 | if (snapshot_node_name && | |
1733 | bdrv_lookup_bs(snapshot_node_name, snapshot_node_name, NULL)) { | |
1734 | error_setg(errp, "New snapshot node name already in use"); | |
1735 | return; | |
1736 | } | |
1737 | ||
1738 | flags = state->old_bs->open_flags; | |
1739 | flags &= ~(BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING | BDRV_O_COPY_ON_READ); | |
1740 | ||
1741 | /* create new image w/backing file */ | |
1742 | mode = s->has_mode ? s->mode : NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
1743 | if (mode != NEW_IMAGE_MODE_EXISTING) { | |
1744 | int64_t size = bdrv_getlength(state->old_bs); | |
1745 | if (size < 0) { | |
1746 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
1747 | return; | |
1748 | } | |
1749 | bdrv_img_create(new_image_file, format, | |
1750 | state->old_bs->filename, | |
1751 | state->old_bs->drv->format_name, | |
1752 | NULL, size, flags, &local_err, false); | |
1753 | if (local_err) { | |
1754 | error_propagate(errp, local_err); | |
1755 | return; | |
1756 | } | |
1757 | } | |
1758 | ||
1759 | options = qdict_new(); | |
1760 | if (s->has_snapshot_node_name) { | |
1761 | qdict_put(options, "node-name", | |
1762 | qstring_from_str(snapshot_node_name)); | |
1763 | } | |
1764 | qdict_put(options, "driver", qstring_from_str(format)); | |
1765 | ||
1766 | flags |= BDRV_O_NO_BACKING; | |
1767 | } | |
1768 | ||
1769 | state->new_bs = bdrv_open(new_image_file, snapshot_ref, options, flags, | |
1770 | errp); | |
1771 | /* We will manually add the backing_hd field to the bs later */ | |
1772 | if (!state->new_bs) { | |
1773 | return; | |
1774 | } | |
1775 | ||
1776 | if (bdrv_has_blk(state->new_bs)) { | |
1777 | error_setg(errp, "The snapshot is already in use by %s", | |
1778 | bdrv_get_parent_name(state->new_bs)); | |
1779 | return; | |
1780 | } | |
1781 | ||
1782 | if (bdrv_op_is_blocked(state->new_bs, BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, | |
1783 | errp)) { | |
1784 | return; | |
1785 | } | |
1786 | ||
1787 | if (state->new_bs->backing != NULL) { | |
1788 | error_setg(errp, "The snapshot already has a backing image"); | |
1789 | return; | |
1790 | } | |
1791 | ||
1792 | if (!state->new_bs->drv->supports_backing) { | |
1793 | error_setg(errp, "The snapshot does not support backing images"); | |
1794 | } | |
1795 | } | |
1796 | ||
1797 | static void external_snapshot_commit(BlkActionState *common) | |
1798 | { | |
1799 | ExternalSnapshotState *state = | |
1800 | DO_UPCAST(ExternalSnapshotState, common, common); | |
1801 | ||
1802 | bdrv_set_aio_context(state->new_bs, state->aio_context); | |
1803 | ||
1804 | /* This removes our old bs and adds the new bs */ | |
1805 | bdrv_append(state->new_bs, state->old_bs); | |
1806 | /* We don't need (or want) to use the transactional | |
1807 | * bdrv_reopen_multiple() across all the entries at once, because we | |
1808 | * don't want to abort all of them if one of them fails the reopen */ | |
1809 | if (!state->old_bs->copy_on_read) { | |
1810 | bdrv_reopen(state->old_bs, state->old_bs->open_flags & ~BDRV_O_RDWR, | |
1811 | NULL); | |
1812 | } | |
1813 | } | |
1814 | ||
1815 | static void external_snapshot_abort(BlkActionState *common) | |
1816 | { | |
1817 | ExternalSnapshotState *state = | |
1818 | DO_UPCAST(ExternalSnapshotState, common, common); | |
1819 | if (state->new_bs) { | |
1820 | bdrv_unref(state->new_bs); | |
1821 | } | |
1822 | } | |
1823 | ||
1824 | static void external_snapshot_clean(BlkActionState *common) | |
1825 | { | |
1826 | ExternalSnapshotState *state = | |
1827 | DO_UPCAST(ExternalSnapshotState, common, common); | |
1828 | if (state->aio_context) { | |
1829 | bdrv_drained_end(state->old_bs); | |
1830 | aio_context_release(state->aio_context); | |
1831 | } | |
1832 | } | |
1833 | ||
1834 | typedef struct DriveBackupState { | |
1835 | BlkActionState common; | |
1836 | BlockDriverState *bs; | |
1837 | AioContext *aio_context; | |
1838 | BlockJob *job; | |
1839 | } DriveBackupState; | |
1840 | ||
1841 | static void do_drive_backup(const char *job_id, const char *device, | |
1842 | const char *target, bool has_format, | |
1843 | const char *format, enum MirrorSyncMode sync, | |
1844 | bool has_mode, enum NewImageMode mode, | |
1845 | bool has_speed, int64_t speed, | |
1846 | bool has_bitmap, const char *bitmap, | |
1847 | bool has_on_source_error, | |
1848 | BlockdevOnError on_source_error, | |
1849 | bool has_on_target_error, | |
1850 | BlockdevOnError on_target_error, | |
1851 | BlockJobTxn *txn, Error **errp); | |
1852 | ||
1853 | static void drive_backup_prepare(BlkActionState *common, Error **errp) | |
1854 | { | |
1855 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
1856 | BlockBackend *blk; | |
1857 | DriveBackup *backup; | |
1858 | Error *local_err = NULL; | |
1859 | ||
1860 | assert(common->action->type == TRANSACTION_ACTION_KIND_DRIVE_BACKUP); | |
1861 | backup = common->action->u.drive_backup.data; | |
1862 | ||
1863 | blk = blk_by_name(backup->device); | |
1864 | if (!blk) { | |
1865 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
1866 | "Device '%s' not found", backup->device); | |
1867 | return; | |
1868 | } | |
1869 | ||
1870 | if (!blk_is_available(blk)) { | |
1871 | error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, backup->device); | |
1872 | return; | |
1873 | } | |
1874 | ||
1875 | /* AioContext is released in .clean() */ | |
1876 | state->aio_context = blk_get_aio_context(blk); | |
1877 | aio_context_acquire(state->aio_context); | |
1878 | bdrv_drained_begin(blk_bs(blk)); | |
1879 | state->bs = blk_bs(blk); | |
1880 | ||
1881 | do_drive_backup(backup->has_job_id ? backup->job_id : NULL, | |
1882 | backup->device, backup->target, | |
1883 | backup->has_format, backup->format, | |
1884 | backup->sync, | |
1885 | backup->has_mode, backup->mode, | |
1886 | backup->has_speed, backup->speed, | |
1887 | backup->has_bitmap, backup->bitmap, | |
1888 | backup->has_on_source_error, backup->on_source_error, | |
1889 | backup->has_on_target_error, backup->on_target_error, | |
1890 | common->block_job_txn, &local_err); | |
1891 | if (local_err) { | |
1892 | error_propagate(errp, local_err); | |
1893 | return; | |
1894 | } | |
1895 | ||
1896 | state->job = state->bs->job; | |
1897 | } | |
1898 | ||
1899 | static void drive_backup_abort(BlkActionState *common) | |
1900 | { | |
1901 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
1902 | BlockDriverState *bs = state->bs; | |
1903 | ||
1904 | /* Only cancel if it's the job we started */ | |
1905 | if (bs && bs->job && bs->job == state->job) { | |
1906 | block_job_cancel_sync(bs->job); | |
1907 | } | |
1908 | } | |
1909 | ||
1910 | static void drive_backup_clean(BlkActionState *common) | |
1911 | { | |
1912 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
1913 | ||
1914 | if (state->aio_context) { | |
1915 | bdrv_drained_end(state->bs); | |
1916 | aio_context_release(state->aio_context); | |
1917 | } | |
1918 | } | |
1919 | ||
1920 | typedef struct BlockdevBackupState { | |
1921 | BlkActionState common; | |
1922 | BlockDriverState *bs; | |
1923 | BlockJob *job; | |
1924 | AioContext *aio_context; | |
1925 | } BlockdevBackupState; | |
1926 | ||
1927 | static void do_blockdev_backup(const char *job_id, const char *device, | |
1928 | const char *target, enum MirrorSyncMode sync, | |
1929 | bool has_speed, int64_t speed, | |
1930 | bool has_on_source_error, | |
1931 | BlockdevOnError on_source_error, | |
1932 | bool has_on_target_error, | |
1933 | BlockdevOnError on_target_error, | |
1934 | BlockJobTxn *txn, Error **errp); | |
1935 | ||
1936 | static void blockdev_backup_prepare(BlkActionState *common, Error **errp) | |
1937 | { | |
1938 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); | |
1939 | BlockdevBackup *backup; | |
1940 | BlockBackend *blk, *target; | |
1941 | Error *local_err = NULL; | |
1942 | ||
1943 | assert(common->action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP); | |
1944 | backup = common->action->u.blockdev_backup.data; | |
1945 | ||
1946 | blk = blk_by_name(backup->device); | |
1947 | if (!blk) { | |
1948 | error_setg(errp, "Device '%s' not found", backup->device); | |
1949 | return; | |
1950 | } | |
1951 | ||
1952 | if (!blk_is_available(blk)) { | |
1953 | error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, backup->device); | |
1954 | return; | |
1955 | } | |
1956 | ||
1957 | target = blk_by_name(backup->target); | |
1958 | if (!target) { | |
1959 | error_setg(errp, "Device '%s' not found", backup->target); | |
1960 | return; | |
1961 | } | |
1962 | ||
1963 | /* AioContext is released in .clean() */ | |
1964 | state->aio_context = blk_get_aio_context(blk); | |
1965 | if (state->aio_context != blk_get_aio_context(target)) { | |
1966 | state->aio_context = NULL; | |
1967 | error_setg(errp, "Backup between two IO threads is not implemented"); | |
1968 | return; | |
1969 | } | |
1970 | aio_context_acquire(state->aio_context); | |
1971 | state->bs = blk_bs(blk); | |
1972 | bdrv_drained_begin(state->bs); | |
1973 | ||
1974 | do_blockdev_backup(backup->has_job_id ? backup->job_id : NULL, | |
1975 | backup->device, backup->target, backup->sync, | |
1976 | backup->has_speed, backup->speed, | |
1977 | backup->has_on_source_error, backup->on_source_error, | |
1978 | backup->has_on_target_error, backup->on_target_error, | |
1979 | common->block_job_txn, &local_err); | |
1980 | if (local_err) { | |
1981 | error_propagate(errp, local_err); | |
1982 | return; | |
1983 | } | |
1984 | ||
1985 | state->job = state->bs->job; | |
1986 | } | |
1987 | ||
1988 | static void blockdev_backup_abort(BlkActionState *common) | |
1989 | { | |
1990 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); | |
1991 | BlockDriverState *bs = state->bs; | |
1992 | ||
1993 | /* Only cancel if it's the job we started */ | |
1994 | if (bs && bs->job && bs->job == state->job) { | |
1995 | block_job_cancel_sync(bs->job); | |
1996 | } | |
1997 | } | |
1998 | ||
1999 | static void blockdev_backup_clean(BlkActionState *common) | |
2000 | { | |
2001 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); | |
2002 | ||
2003 | if (state->aio_context) { | |
2004 | bdrv_drained_end(state->bs); | |
2005 | aio_context_release(state->aio_context); | |
2006 | } | |
2007 | } | |
2008 | ||
2009 | typedef struct BlockDirtyBitmapState { | |
2010 | BlkActionState common; | |
2011 | BdrvDirtyBitmap *bitmap; | |
2012 | BlockDriverState *bs; | |
2013 | AioContext *aio_context; | |
2014 | HBitmap *backup; | |
2015 | bool prepared; | |
2016 | } BlockDirtyBitmapState; | |
2017 | ||
2018 | static void block_dirty_bitmap_add_prepare(BlkActionState *common, | |
2019 | Error **errp) | |
2020 | { | |
2021 | Error *local_err = NULL; | |
2022 | BlockDirtyBitmapAdd *action; | |
2023 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2024 | common, common); | |
2025 | ||
2026 | if (action_check_completion_mode(common, errp) < 0) { | |
2027 | return; | |
2028 | } | |
2029 | ||
2030 | action = common->action->u.block_dirty_bitmap_add.data; | |
2031 | /* AIO context taken and released within qmp_block_dirty_bitmap_add */ | |
2032 | qmp_block_dirty_bitmap_add(action->node, action->name, | |
2033 | action->has_granularity, action->granularity, | |
2034 | &local_err); | |
2035 | ||
2036 | if (!local_err) { | |
2037 | state->prepared = true; | |
2038 | } else { | |
2039 | error_propagate(errp, local_err); | |
2040 | } | |
2041 | } | |
2042 | ||
2043 | static void block_dirty_bitmap_add_abort(BlkActionState *common) | |
2044 | { | |
2045 | BlockDirtyBitmapAdd *action; | |
2046 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2047 | common, common); | |
2048 | ||
2049 | action = common->action->u.block_dirty_bitmap_add.data; | |
2050 | /* Should not be able to fail: IF the bitmap was added via .prepare(), | |
2051 | * then the node reference and bitmap name must have been valid. | |
2052 | */ | |
2053 | if (state->prepared) { | |
2054 | qmp_block_dirty_bitmap_remove(action->node, action->name, &error_abort); | |
2055 | } | |
2056 | } | |
2057 | ||
2058 | static void block_dirty_bitmap_clear_prepare(BlkActionState *common, | |
2059 | Error **errp) | |
2060 | { | |
2061 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2062 | common, common); | |
2063 | BlockDirtyBitmap *action; | |
2064 | ||
2065 | if (action_check_completion_mode(common, errp) < 0) { | |
2066 | return; | |
2067 | } | |
2068 | ||
2069 | action = common->action->u.block_dirty_bitmap_clear.data; | |
2070 | state->bitmap = block_dirty_bitmap_lookup(action->node, | |
2071 | action->name, | |
2072 | &state->bs, | |
2073 | &state->aio_context, | |
2074 | errp); | |
2075 | if (!state->bitmap) { | |
2076 | return; | |
2077 | } | |
2078 | ||
2079 | if (bdrv_dirty_bitmap_frozen(state->bitmap)) { | |
2080 | error_setg(errp, "Cannot modify a frozen bitmap"); | |
2081 | return; | |
2082 | } else if (!bdrv_dirty_bitmap_enabled(state->bitmap)) { | |
2083 | error_setg(errp, "Cannot clear a disabled bitmap"); | |
2084 | return; | |
2085 | } | |
2086 | ||
2087 | bdrv_clear_dirty_bitmap(state->bitmap, &state->backup); | |
2088 | /* AioContext is released in .clean() */ | |
2089 | } | |
2090 | ||
2091 | static void block_dirty_bitmap_clear_abort(BlkActionState *common) | |
2092 | { | |
2093 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2094 | common, common); | |
2095 | ||
2096 | bdrv_undo_clear_dirty_bitmap(state->bitmap, state->backup); | |
2097 | } | |
2098 | ||
2099 | static void block_dirty_bitmap_clear_commit(BlkActionState *common) | |
2100 | { | |
2101 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2102 | common, common); | |
2103 | ||
2104 | hbitmap_free(state->backup); | |
2105 | } | |
2106 | ||
2107 | static void block_dirty_bitmap_clear_clean(BlkActionState *common) | |
2108 | { | |
2109 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2110 | common, common); | |
2111 | ||
2112 | if (state->aio_context) { | |
2113 | aio_context_release(state->aio_context); | |
2114 | } | |
2115 | } | |
2116 | ||
2117 | static void abort_prepare(BlkActionState *common, Error **errp) | |
2118 | { | |
2119 | error_setg(errp, "Transaction aborted using Abort action"); | |
2120 | } | |
2121 | ||
2122 | static void abort_commit(BlkActionState *common) | |
2123 | { | |
2124 | g_assert_not_reached(); /* this action never succeeds */ | |
2125 | } | |
2126 | ||
2127 | static const BlkActionOps actions[] = { | |
2128 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT] = { | |
2129 | .instance_size = sizeof(ExternalSnapshotState), | |
2130 | .prepare = external_snapshot_prepare, | |
2131 | .commit = external_snapshot_commit, | |
2132 | .abort = external_snapshot_abort, | |
2133 | .clean = external_snapshot_clean, | |
2134 | }, | |
2135 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = { | |
2136 | .instance_size = sizeof(ExternalSnapshotState), | |
2137 | .prepare = external_snapshot_prepare, | |
2138 | .commit = external_snapshot_commit, | |
2139 | .abort = external_snapshot_abort, | |
2140 | .clean = external_snapshot_clean, | |
2141 | }, | |
2142 | [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = { | |
2143 | .instance_size = sizeof(DriveBackupState), | |
2144 | .prepare = drive_backup_prepare, | |
2145 | .abort = drive_backup_abort, | |
2146 | .clean = drive_backup_clean, | |
2147 | }, | |
2148 | [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP] = { | |
2149 | .instance_size = sizeof(BlockdevBackupState), | |
2150 | .prepare = blockdev_backup_prepare, | |
2151 | .abort = blockdev_backup_abort, | |
2152 | .clean = blockdev_backup_clean, | |
2153 | }, | |
2154 | [TRANSACTION_ACTION_KIND_ABORT] = { | |
2155 | .instance_size = sizeof(BlkActionState), | |
2156 | .prepare = abort_prepare, | |
2157 | .commit = abort_commit, | |
2158 | }, | |
2159 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = { | |
2160 | .instance_size = sizeof(InternalSnapshotState), | |
2161 | .prepare = internal_snapshot_prepare, | |
2162 | .abort = internal_snapshot_abort, | |
2163 | .clean = internal_snapshot_clean, | |
2164 | }, | |
2165 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD] = { | |
2166 | .instance_size = sizeof(BlockDirtyBitmapState), | |
2167 | .prepare = block_dirty_bitmap_add_prepare, | |
2168 | .abort = block_dirty_bitmap_add_abort, | |
2169 | }, | |
2170 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR] = { | |
2171 | .instance_size = sizeof(BlockDirtyBitmapState), | |
2172 | .prepare = block_dirty_bitmap_clear_prepare, | |
2173 | .commit = block_dirty_bitmap_clear_commit, | |
2174 | .abort = block_dirty_bitmap_clear_abort, | |
2175 | .clean = block_dirty_bitmap_clear_clean, | |
2176 | } | |
2177 | }; | |
2178 | ||
2179 | /** | |
2180 | * Allocate a TransactionProperties structure if necessary, and fill | |
2181 | * that structure with desired defaults if they are unset. | |
2182 | */ | |
2183 | static TransactionProperties *get_transaction_properties( | |
2184 | TransactionProperties *props) | |
2185 | { | |
2186 | if (!props) { | |
2187 | props = g_new0(TransactionProperties, 1); | |
2188 | } | |
2189 | ||
2190 | if (!props->has_completion_mode) { | |
2191 | props->has_completion_mode = true; | |
2192 | props->completion_mode = ACTION_COMPLETION_MODE_INDIVIDUAL; | |
2193 | } | |
2194 | ||
2195 | return props; | |
2196 | } | |
2197 | ||
2198 | /* | |
2199 | * 'Atomic' group operations. The operations are performed as a set, and if | |
2200 | * any fail then we roll back all operations in the group. | |
2201 | */ | |
2202 | void qmp_transaction(TransactionActionList *dev_list, | |
2203 | bool has_props, | |
2204 | struct TransactionProperties *props, | |
2205 | Error **errp) | |
2206 | { | |
2207 | TransactionActionList *dev_entry = dev_list; | |
2208 | BlockJobTxn *block_job_txn = NULL; | |
2209 | BlkActionState *state, *next; | |
2210 | Error *local_err = NULL; | |
2211 | ||
2212 | QSIMPLEQ_HEAD(snap_bdrv_states, BlkActionState) snap_bdrv_states; | |
2213 | QSIMPLEQ_INIT(&snap_bdrv_states); | |
2214 | ||
2215 | /* Does this transaction get canceled as a group on failure? | |
2216 | * If not, we don't really need to make a BlockJobTxn. | |
2217 | */ | |
2218 | props = get_transaction_properties(props); | |
2219 | if (props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) { | |
2220 | block_job_txn = block_job_txn_new(); | |
2221 | } | |
2222 | ||
2223 | /* drain all i/o before any operations */ | |
2224 | bdrv_drain_all(); | |
2225 | ||
2226 | /* We don't do anything in this loop that commits us to the operations */ | |
2227 | while (NULL != dev_entry) { | |
2228 | TransactionAction *dev_info = NULL; | |
2229 | const BlkActionOps *ops; | |
2230 | ||
2231 | dev_info = dev_entry->value; | |
2232 | dev_entry = dev_entry->next; | |
2233 | ||
2234 | assert(dev_info->type < ARRAY_SIZE(actions)); | |
2235 | ||
2236 | ops = &actions[dev_info->type]; | |
2237 | assert(ops->instance_size > 0); | |
2238 | ||
2239 | state = g_malloc0(ops->instance_size); | |
2240 | state->ops = ops; | |
2241 | state->action = dev_info; | |
2242 | state->block_job_txn = block_job_txn; | |
2243 | state->txn_props = props; | |
2244 | QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry); | |
2245 | ||
2246 | state->ops->prepare(state, &local_err); | |
2247 | if (local_err) { | |
2248 | error_propagate(errp, local_err); | |
2249 | goto delete_and_fail; | |
2250 | } | |
2251 | } | |
2252 | ||
2253 | QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) { | |
2254 | if (state->ops->commit) { | |
2255 | state->ops->commit(state); | |
2256 | } | |
2257 | } | |
2258 | ||
2259 | /* success */ | |
2260 | goto exit; | |
2261 | ||
2262 | delete_and_fail: | |
2263 | /* failure, and it is all-or-none; roll back all operations */ | |
2264 | QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) { | |
2265 | if (state->ops->abort) { | |
2266 | state->ops->abort(state); | |
2267 | } | |
2268 | } | |
2269 | exit: | |
2270 | QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) { | |
2271 | if (state->ops->clean) { | |
2272 | state->ops->clean(state); | |
2273 | } | |
2274 | g_free(state); | |
2275 | } | |
2276 | if (!has_props) { | |
2277 | qapi_free_TransactionProperties(props); | |
2278 | } | |
2279 | block_job_txn_unref(block_job_txn); | |
2280 | } | |
2281 | ||
2282 | void qmp_eject(const char *device, bool has_force, bool force, Error **errp) | |
2283 | { | |
2284 | Error *local_err = NULL; | |
2285 | int rc; | |
2286 | ||
2287 | if (!has_force) { | |
2288 | force = false; | |
2289 | } | |
2290 | ||
2291 | rc = do_open_tray(device, force, &local_err); | |
2292 | if (rc && rc != -ENOSYS) { | |
2293 | error_propagate(errp, local_err); | |
2294 | return; | |
2295 | } | |
2296 | error_free(local_err); | |
2297 | ||
2298 | qmp_x_blockdev_remove_medium(device, errp); | |
2299 | } | |
2300 | ||
2301 | void qmp_block_passwd(bool has_device, const char *device, | |
2302 | bool has_node_name, const char *node_name, | |
2303 | const char *password, Error **errp) | |
2304 | { | |
2305 | Error *local_err = NULL; | |
2306 | BlockDriverState *bs; | |
2307 | AioContext *aio_context; | |
2308 | ||
2309 | bs = bdrv_lookup_bs(has_device ? device : NULL, | |
2310 | has_node_name ? node_name : NULL, | |
2311 | &local_err); | |
2312 | if (local_err) { | |
2313 | error_propagate(errp, local_err); | |
2314 | return; | |
2315 | } | |
2316 | ||
2317 | aio_context = bdrv_get_aio_context(bs); | |
2318 | aio_context_acquire(aio_context); | |
2319 | ||
2320 | bdrv_add_key(bs, password, errp); | |
2321 | ||
2322 | aio_context_release(aio_context); | |
2323 | } | |
2324 | ||
2325 | /* | |
2326 | * Attempt to open the tray of @device. | |
2327 | * If @force, ignore its tray lock. | |
2328 | * Else, if the tray is locked, don't open it, but ask the guest to open it. | |
2329 | * On error, store an error through @errp and return -errno. | |
2330 | * If @device does not exist, return -ENODEV. | |
2331 | * If it has no removable media, return -ENOTSUP. | |
2332 | * If it has no tray, return -ENOSYS. | |
2333 | * If the guest was asked to open the tray, return -EINPROGRESS. | |
2334 | * Else, return 0. | |
2335 | */ | |
2336 | static int do_open_tray(const char *device, bool force, Error **errp) | |
2337 | { | |
2338 | BlockBackend *blk; | |
2339 | bool locked; | |
2340 | ||
2341 | blk = blk_by_name(device); | |
2342 | if (!blk) { | |
2343 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
2344 | "Device '%s' not found", device); | |
2345 | return -ENODEV; | |
2346 | } | |
2347 | ||
2348 | if (!blk_dev_has_removable_media(blk)) { | |
2349 | error_setg(errp, "Device '%s' is not removable", device); | |
2350 | return -ENOTSUP; | |
2351 | } | |
2352 | ||
2353 | if (!blk_dev_has_tray(blk)) { | |
2354 | error_setg(errp, "Device '%s' does not have a tray", device); | |
2355 | return -ENOSYS; | |
2356 | } | |
2357 | ||
2358 | if (blk_dev_is_tray_open(blk)) { | |
2359 | return 0; | |
2360 | } | |
2361 | ||
2362 | locked = blk_dev_is_medium_locked(blk); | |
2363 | if (locked) { | |
2364 | blk_dev_eject_request(blk, force); | |
2365 | } | |
2366 | ||
2367 | if (!locked || force) { | |
2368 | blk_dev_change_media_cb(blk, false); | |
2369 | } | |
2370 | ||
2371 | if (locked && !force) { | |
2372 | error_setg(errp, "Device '%s' is locked and force was not specified, " | |
2373 | "wait for tray to open and try again", device); | |
2374 | return -EINPROGRESS; | |
2375 | } | |
2376 | ||
2377 | return 0; | |
2378 | } | |
2379 | ||
2380 | void qmp_blockdev_open_tray(const char *device, bool has_force, bool force, | |
2381 | Error **errp) | |
2382 | { | |
2383 | Error *local_err = NULL; | |
2384 | int rc; | |
2385 | ||
2386 | if (!has_force) { | |
2387 | force = false; | |
2388 | } | |
2389 | rc = do_open_tray(device, force, &local_err); | |
2390 | if (rc && rc != -ENOSYS && rc != -EINPROGRESS) { | |
2391 | error_propagate(errp, local_err); | |
2392 | return; | |
2393 | } | |
2394 | error_free(local_err); | |
2395 | } | |
2396 | ||
2397 | void qmp_blockdev_close_tray(const char *device, Error **errp) | |
2398 | { | |
2399 | BlockBackend *blk; | |
2400 | ||
2401 | blk = blk_by_name(device); | |
2402 | if (!blk) { | |
2403 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
2404 | "Device '%s' not found", device); | |
2405 | return; | |
2406 | } | |
2407 | ||
2408 | if (!blk_dev_has_removable_media(blk)) { | |
2409 | error_setg(errp, "Device '%s' is not removable", device); | |
2410 | return; | |
2411 | } | |
2412 | ||
2413 | if (!blk_dev_has_tray(blk)) { | |
2414 | /* Ignore this command on tray-less devices */ | |
2415 | return; | |
2416 | } | |
2417 | ||
2418 | if (!blk_dev_is_tray_open(blk)) { | |
2419 | return; | |
2420 | } | |
2421 | ||
2422 | blk_dev_change_media_cb(blk, true); | |
2423 | } | |
2424 | ||
2425 | void qmp_x_blockdev_remove_medium(const char *device, Error **errp) | |
2426 | { | |
2427 | BlockBackend *blk; | |
2428 | BlockDriverState *bs; | |
2429 | AioContext *aio_context; | |
2430 | bool has_device; | |
2431 | ||
2432 | blk = blk_by_name(device); | |
2433 | if (!blk) { | |
2434 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
2435 | "Device '%s' not found", device); | |
2436 | return; | |
2437 | } | |
2438 | ||
2439 | /* For BBs without a device, we can exchange the BDS tree at will */ | |
2440 | has_device = blk_get_attached_dev(blk); | |
2441 | ||
2442 | if (has_device && !blk_dev_has_removable_media(blk)) { | |
2443 | error_setg(errp, "Device '%s' is not removable", device); | |
2444 | return; | |
2445 | } | |
2446 | ||
2447 | if (has_device && blk_dev_has_tray(blk) && !blk_dev_is_tray_open(blk)) { | |
2448 | error_setg(errp, "Tray of device '%s' is not open", device); | |
2449 | return; | |
2450 | } | |
2451 | ||
2452 | bs = blk_bs(blk); | |
2453 | if (!bs) { | |
2454 | return; | |
2455 | } | |
2456 | ||
2457 | aio_context = bdrv_get_aio_context(bs); | |
2458 | aio_context_acquire(aio_context); | |
2459 | ||
2460 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_EJECT, errp)) { | |
2461 | goto out; | |
2462 | } | |
2463 | ||
2464 | blk_remove_bs(blk); | |
2465 | ||
2466 | if (!blk_dev_has_tray(blk)) { | |
2467 | /* For tray-less devices, blockdev-open-tray is a no-op (or may not be | |
2468 | * called at all); therefore, the medium needs to be ejected here. | |
2469 | * Do it after blk_remove_bs() so blk_is_inserted(blk) returns the @load | |
2470 | * value passed here (i.e. false). */ | |
2471 | blk_dev_change_media_cb(blk, false); | |
2472 | } | |
2473 | ||
2474 | out: | |
2475 | aio_context_release(aio_context); | |
2476 | } | |
2477 | ||
2478 | static void qmp_blockdev_insert_anon_medium(const char *device, | |
2479 | BlockDriverState *bs, Error **errp) | |
2480 | { | |
2481 | BlockBackend *blk; | |
2482 | bool has_device; | |
2483 | ||
2484 | blk = blk_by_name(device); | |
2485 | if (!blk) { | |
2486 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
2487 | "Device '%s' not found", device); | |
2488 | return; | |
2489 | } | |
2490 | ||
2491 | /* For BBs without a device, we can exchange the BDS tree at will */ | |
2492 | has_device = blk_get_attached_dev(blk); | |
2493 | ||
2494 | if (has_device && !blk_dev_has_removable_media(blk)) { | |
2495 | error_setg(errp, "Device '%s' is not removable", device); | |
2496 | return; | |
2497 | } | |
2498 | ||
2499 | if (has_device && blk_dev_has_tray(blk) && !blk_dev_is_tray_open(blk)) { | |
2500 | error_setg(errp, "Tray of device '%s' is not open", device); | |
2501 | return; | |
2502 | } | |
2503 | ||
2504 | if (blk_bs(blk)) { | |
2505 | error_setg(errp, "There already is a medium in device '%s'", device); | |
2506 | return; | |
2507 | } | |
2508 | ||
2509 | blk_insert_bs(blk, bs); | |
2510 | ||
2511 | if (!blk_dev_has_tray(blk)) { | |
2512 | /* For tray-less devices, blockdev-close-tray is a no-op (or may not be | |
2513 | * called at all); therefore, the medium needs to be pushed into the | |
2514 | * slot here. | |
2515 | * Do it after blk_insert_bs() so blk_is_inserted(blk) returns the @load | |
2516 | * value passed here (i.e. true). */ | |
2517 | blk_dev_change_media_cb(blk, true); | |
2518 | } | |
2519 | } | |
2520 | ||
2521 | void qmp_x_blockdev_insert_medium(const char *device, const char *node_name, | |
2522 | Error **errp) | |
2523 | { | |
2524 | BlockDriverState *bs; | |
2525 | ||
2526 | bs = bdrv_find_node(node_name); | |
2527 | if (!bs) { | |
2528 | error_setg(errp, "Node '%s' not found", node_name); | |
2529 | return; | |
2530 | } | |
2531 | ||
2532 | if (bdrv_has_blk(bs)) { | |
2533 | error_setg(errp, "Node '%s' is already in use by '%s'", node_name, | |
2534 | bdrv_get_parent_name(bs)); | |
2535 | return; | |
2536 | } | |
2537 | ||
2538 | qmp_blockdev_insert_anon_medium(device, bs, errp); | |
2539 | } | |
2540 | ||
2541 | void qmp_blockdev_change_medium(const char *device, const char *filename, | |
2542 | bool has_format, const char *format, | |
2543 | bool has_read_only, | |
2544 | BlockdevChangeReadOnlyMode read_only, | |
2545 | Error **errp) | |
2546 | { | |
2547 | BlockBackend *blk; | |
2548 | BlockDriverState *medium_bs = NULL; | |
2549 | int bdrv_flags; | |
2550 | int rc; | |
2551 | QDict *options = NULL; | |
2552 | Error *err = NULL; | |
2553 | ||
2554 | blk = blk_by_name(device); | |
2555 | if (!blk) { | |
2556 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
2557 | "Device '%s' not found", device); | |
2558 | goto fail; | |
2559 | } | |
2560 | ||
2561 | if (blk_bs(blk)) { | |
2562 | blk_update_root_state(blk); | |
2563 | } | |
2564 | ||
2565 | bdrv_flags = blk_get_open_flags_from_root_state(blk); | |
2566 | bdrv_flags &= ~(BDRV_O_TEMPORARY | BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING | | |
2567 | BDRV_O_PROTOCOL); | |
2568 | ||
2569 | if (!has_read_only) { | |
2570 | read_only = BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN; | |
2571 | } | |
2572 | ||
2573 | switch (read_only) { | |
2574 | case BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN: | |
2575 | break; | |
2576 | ||
2577 | case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_ONLY: | |
2578 | bdrv_flags &= ~BDRV_O_RDWR; | |
2579 | break; | |
2580 | ||
2581 | case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_WRITE: | |
2582 | bdrv_flags |= BDRV_O_RDWR; | |
2583 | break; | |
2584 | ||
2585 | default: | |
2586 | abort(); | |
2587 | } | |
2588 | ||
2589 | if (has_format) { | |
2590 | options = qdict_new(); | |
2591 | qdict_put(options, "driver", qstring_from_str(format)); | |
2592 | } | |
2593 | ||
2594 | medium_bs = bdrv_open(filename, NULL, options, bdrv_flags, errp); | |
2595 | if (!medium_bs) { | |
2596 | goto fail; | |
2597 | } | |
2598 | ||
2599 | bdrv_add_key(medium_bs, NULL, &err); | |
2600 | if (err) { | |
2601 | error_propagate(errp, err); | |
2602 | goto fail; | |
2603 | } | |
2604 | ||
2605 | rc = do_open_tray(device, false, &err); | |
2606 | if (rc && rc != -ENOSYS) { | |
2607 | error_propagate(errp, err); | |
2608 | goto fail; | |
2609 | } | |
2610 | error_free(err); | |
2611 | err = NULL; | |
2612 | ||
2613 | qmp_x_blockdev_remove_medium(device, &err); | |
2614 | if (err) { | |
2615 | error_propagate(errp, err); | |
2616 | goto fail; | |
2617 | } | |
2618 | ||
2619 | qmp_blockdev_insert_anon_medium(device, medium_bs, &err); | |
2620 | if (err) { | |
2621 | error_propagate(errp, err); | |
2622 | goto fail; | |
2623 | } | |
2624 | ||
2625 | blk_apply_root_state(blk, medium_bs); | |
2626 | ||
2627 | qmp_blockdev_close_tray(device, errp); | |
2628 | ||
2629 | fail: | |
2630 | /* If the medium has been inserted, the device has its own reference, so | |
2631 | * ours must be relinquished; and if it has not been inserted successfully, | |
2632 | * the reference must be relinquished anyway */ | |
2633 | bdrv_unref(medium_bs); | |
2634 | } | |
2635 | ||
2636 | /* throttling disk I/O limits */ | |
2637 | void qmp_block_set_io_throttle(BlockIOThrottle *arg, Error **errp) | |
2638 | { | |
2639 | ThrottleConfig cfg; | |
2640 | BlockDriverState *bs; | |
2641 | BlockBackend *blk; | |
2642 | AioContext *aio_context; | |
2643 | ||
2644 | blk = blk_by_name(arg->device); | |
2645 | if (!blk) { | |
2646 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
2647 | "Device '%s' not found", arg->device); | |
2648 | return; | |
2649 | } | |
2650 | ||
2651 | aio_context = blk_get_aio_context(blk); | |
2652 | aio_context_acquire(aio_context); | |
2653 | ||
2654 | bs = blk_bs(blk); | |
2655 | if (!bs) { | |
2656 | error_setg(errp, "Device '%s' has no medium", arg->device); | |
2657 | goto out; | |
2658 | } | |
2659 | ||
2660 | throttle_config_init(&cfg); | |
2661 | cfg.buckets[THROTTLE_BPS_TOTAL].avg = arg->bps; | |
2662 | cfg.buckets[THROTTLE_BPS_READ].avg = arg->bps_rd; | |
2663 | cfg.buckets[THROTTLE_BPS_WRITE].avg = arg->bps_wr; | |
2664 | ||
2665 | cfg.buckets[THROTTLE_OPS_TOTAL].avg = arg->iops; | |
2666 | cfg.buckets[THROTTLE_OPS_READ].avg = arg->iops_rd; | |
2667 | cfg.buckets[THROTTLE_OPS_WRITE].avg = arg->iops_wr; | |
2668 | ||
2669 | if (arg->has_bps_max) { | |
2670 | cfg.buckets[THROTTLE_BPS_TOTAL].max = arg->bps_max; | |
2671 | } | |
2672 | if (arg->has_bps_rd_max) { | |
2673 | cfg.buckets[THROTTLE_BPS_READ].max = arg->bps_rd_max; | |
2674 | } | |
2675 | if (arg->has_bps_wr_max) { | |
2676 | cfg.buckets[THROTTLE_BPS_WRITE].max = arg->bps_wr_max; | |
2677 | } | |
2678 | if (arg->has_iops_max) { | |
2679 | cfg.buckets[THROTTLE_OPS_TOTAL].max = arg->iops_max; | |
2680 | } | |
2681 | if (arg->has_iops_rd_max) { | |
2682 | cfg.buckets[THROTTLE_OPS_READ].max = arg->iops_rd_max; | |
2683 | } | |
2684 | if (arg->has_iops_wr_max) { | |
2685 | cfg.buckets[THROTTLE_OPS_WRITE].max = arg->iops_wr_max; | |
2686 | } | |
2687 | ||
2688 | if (arg->has_bps_max_length) { | |
2689 | cfg.buckets[THROTTLE_BPS_TOTAL].burst_length = arg->bps_max_length; | |
2690 | } | |
2691 | if (arg->has_bps_rd_max_length) { | |
2692 | cfg.buckets[THROTTLE_BPS_READ].burst_length = arg->bps_rd_max_length; | |
2693 | } | |
2694 | if (arg->has_bps_wr_max_length) { | |
2695 | cfg.buckets[THROTTLE_BPS_WRITE].burst_length = arg->bps_wr_max_length; | |
2696 | } | |
2697 | if (arg->has_iops_max_length) { | |
2698 | cfg.buckets[THROTTLE_OPS_TOTAL].burst_length = arg->iops_max_length; | |
2699 | } | |
2700 | if (arg->has_iops_rd_max_length) { | |
2701 | cfg.buckets[THROTTLE_OPS_READ].burst_length = arg->iops_rd_max_length; | |
2702 | } | |
2703 | if (arg->has_iops_wr_max_length) { | |
2704 | cfg.buckets[THROTTLE_OPS_WRITE].burst_length = arg->iops_wr_max_length; | |
2705 | } | |
2706 | ||
2707 | if (arg->has_iops_size) { | |
2708 | cfg.op_size = arg->iops_size; | |
2709 | } | |
2710 | ||
2711 | if (!throttle_is_valid(&cfg, errp)) { | |
2712 | goto out; | |
2713 | } | |
2714 | ||
2715 | if (throttle_enabled(&cfg)) { | |
2716 | /* Enable I/O limits if they're not enabled yet, otherwise | |
2717 | * just update the throttling group. */ | |
2718 | if (!blk_get_public(blk)->throttle_state) { | |
2719 | blk_io_limits_enable(blk, | |
2720 | arg->has_group ? arg->group : arg->device); | |
2721 | } else if (arg->has_group) { | |
2722 | blk_io_limits_update_group(blk, arg->group); | |
2723 | } | |
2724 | /* Set the new throttling configuration */ | |
2725 | blk_set_io_limits(blk, &cfg); | |
2726 | } else if (blk_get_public(blk)->throttle_state) { | |
2727 | /* If all throttling settings are set to 0, disable I/O limits */ | |
2728 | blk_io_limits_disable(blk); | |
2729 | } | |
2730 | ||
2731 | out: | |
2732 | aio_context_release(aio_context); | |
2733 | } | |
2734 | ||
2735 | void qmp_block_dirty_bitmap_add(const char *node, const char *name, | |
2736 | bool has_granularity, uint32_t granularity, | |
2737 | Error **errp) | |
2738 | { | |
2739 | AioContext *aio_context; | |
2740 | BlockDriverState *bs; | |
2741 | ||
2742 | if (!name || name[0] == '\0') { | |
2743 | error_setg(errp, "Bitmap name cannot be empty"); | |
2744 | return; | |
2745 | } | |
2746 | ||
2747 | bs = bdrv_lookup_bs(node, node, errp); | |
2748 | if (!bs) { | |
2749 | return; | |
2750 | } | |
2751 | ||
2752 | aio_context = bdrv_get_aio_context(bs); | |
2753 | aio_context_acquire(aio_context); | |
2754 | ||
2755 | if (has_granularity) { | |
2756 | if (granularity < 512 || !is_power_of_2(granularity)) { | |
2757 | error_setg(errp, "Granularity must be power of 2 " | |
2758 | "and at least 512"); | |
2759 | goto out; | |
2760 | } | |
2761 | } else { | |
2762 | /* Default to cluster size, if available: */ | |
2763 | granularity = bdrv_get_default_bitmap_granularity(bs); | |
2764 | } | |
2765 | ||
2766 | bdrv_create_dirty_bitmap(bs, granularity, name, errp); | |
2767 | ||
2768 | out: | |
2769 | aio_context_release(aio_context); | |
2770 | } | |
2771 | ||
2772 | void qmp_block_dirty_bitmap_remove(const char *node, const char *name, | |
2773 | Error **errp) | |
2774 | { | |
2775 | AioContext *aio_context; | |
2776 | BlockDriverState *bs; | |
2777 | BdrvDirtyBitmap *bitmap; | |
2778 | ||
2779 | bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp); | |
2780 | if (!bitmap || !bs) { | |
2781 | return; | |
2782 | } | |
2783 | ||
2784 | if (bdrv_dirty_bitmap_frozen(bitmap)) { | |
2785 | error_setg(errp, | |
2786 | "Bitmap '%s' is currently frozen and cannot be removed", | |
2787 | name); | |
2788 | goto out; | |
2789 | } | |
2790 | bdrv_dirty_bitmap_make_anon(bitmap); | |
2791 | bdrv_release_dirty_bitmap(bs, bitmap); | |
2792 | ||
2793 | out: | |
2794 | aio_context_release(aio_context); | |
2795 | } | |
2796 | ||
2797 | /** | |
2798 | * Completely clear a bitmap, for the purposes of synchronizing a bitmap | |
2799 | * immediately after a full backup operation. | |
2800 | */ | |
2801 | void qmp_block_dirty_bitmap_clear(const char *node, const char *name, | |
2802 | Error **errp) | |
2803 | { | |
2804 | AioContext *aio_context; | |
2805 | BdrvDirtyBitmap *bitmap; | |
2806 | BlockDriverState *bs; | |
2807 | ||
2808 | bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp); | |
2809 | if (!bitmap || !bs) { | |
2810 | return; | |
2811 | } | |
2812 | ||
2813 | if (bdrv_dirty_bitmap_frozen(bitmap)) { | |
2814 | error_setg(errp, | |
2815 | "Bitmap '%s' is currently frozen and cannot be modified", | |
2816 | name); | |
2817 | goto out; | |
2818 | } else if (!bdrv_dirty_bitmap_enabled(bitmap)) { | |
2819 | error_setg(errp, | |
2820 | "Bitmap '%s' is currently disabled and cannot be cleared", | |
2821 | name); | |
2822 | goto out; | |
2823 | } | |
2824 | ||
2825 | bdrv_clear_dirty_bitmap(bitmap, NULL); | |
2826 | ||
2827 | out: | |
2828 | aio_context_release(aio_context); | |
2829 | } | |
2830 | ||
2831 | void hmp_drive_del(Monitor *mon, const QDict *qdict) | |
2832 | { | |
2833 | const char *id = qdict_get_str(qdict, "id"); | |
2834 | BlockBackend *blk; | |
2835 | BlockDriverState *bs; | |
2836 | AioContext *aio_context; | |
2837 | Error *local_err = NULL; | |
2838 | ||
2839 | bs = bdrv_find_node(id); | |
2840 | if (bs) { | |
2841 | qmp_x_blockdev_del(false, NULL, true, id, &local_err); | |
2842 | if (local_err) { | |
2843 | error_report_err(local_err); | |
2844 | } | |
2845 | return; | |
2846 | } | |
2847 | ||
2848 | blk = blk_by_name(id); | |
2849 | if (!blk) { | |
2850 | error_report("Device '%s' not found", id); | |
2851 | return; | |
2852 | } | |
2853 | ||
2854 | if (!blk_legacy_dinfo(blk)) { | |
2855 | error_report("Deleting device added with blockdev-add" | |
2856 | " is not supported"); | |
2857 | return; | |
2858 | } | |
2859 | ||
2860 | aio_context = blk_get_aio_context(blk); | |
2861 | aio_context_acquire(aio_context); | |
2862 | ||
2863 | bs = blk_bs(blk); | |
2864 | if (bs) { | |
2865 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) { | |
2866 | error_report_err(local_err); | |
2867 | aio_context_release(aio_context); | |
2868 | return; | |
2869 | } | |
2870 | ||
2871 | blk_remove_bs(blk); | |
2872 | } | |
2873 | ||
2874 | /* Make the BlockBackend and the attached BlockDriverState anonymous */ | |
2875 | monitor_remove_blk(blk); | |
2876 | ||
2877 | /* If this BlockBackend has a device attached to it, its refcount will be | |
2878 | * decremented when the device is removed; otherwise we have to do so here. | |
2879 | */ | |
2880 | if (blk_get_attached_dev(blk)) { | |
2881 | /* Further I/O must not pause the guest */ | |
2882 | blk_set_on_error(blk, BLOCKDEV_ON_ERROR_REPORT, | |
2883 | BLOCKDEV_ON_ERROR_REPORT); | |
2884 | } else { | |
2885 | blk_unref(blk); | |
2886 | } | |
2887 | ||
2888 | aio_context_release(aio_context); | |
2889 | } | |
2890 | ||
2891 | void qmp_block_resize(bool has_device, const char *device, | |
2892 | bool has_node_name, const char *node_name, | |
2893 | int64_t size, Error **errp) | |
2894 | { | |
2895 | Error *local_err = NULL; | |
2896 | BlockDriverState *bs; | |
2897 | AioContext *aio_context; | |
2898 | int ret; | |
2899 | ||
2900 | bs = bdrv_lookup_bs(has_device ? device : NULL, | |
2901 | has_node_name ? node_name : NULL, | |
2902 | &local_err); | |
2903 | if (local_err) { | |
2904 | error_propagate(errp, local_err); | |
2905 | return; | |
2906 | } | |
2907 | ||
2908 | aio_context = bdrv_get_aio_context(bs); | |
2909 | aio_context_acquire(aio_context); | |
2910 | ||
2911 | if (!bdrv_is_first_non_filter(bs)) { | |
2912 | error_setg(errp, QERR_FEATURE_DISABLED, "resize"); | |
2913 | goto out; | |
2914 | } | |
2915 | ||
2916 | if (size < 0) { | |
2917 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); | |
2918 | goto out; | |
2919 | } | |
2920 | ||
2921 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) { | |
2922 | error_setg(errp, QERR_DEVICE_IN_USE, device); | |
2923 | goto out; | |
2924 | } | |
2925 | ||
2926 | /* complete all in-flight operations before resizing the device */ | |
2927 | bdrv_drain_all(); | |
2928 | ||
2929 | ret = bdrv_truncate(bs, size); | |
2930 | switch (ret) { | |
2931 | case 0: | |
2932 | break; | |
2933 | case -ENOMEDIUM: | |
2934 | error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
2935 | break; | |
2936 | case -ENOTSUP: | |
2937 | error_setg(errp, QERR_UNSUPPORTED); | |
2938 | break; | |
2939 | case -EACCES: | |
2940 | error_setg(errp, "Device '%s' is read only", device); | |
2941 | break; | |
2942 | case -EBUSY: | |
2943 | error_setg(errp, QERR_DEVICE_IN_USE, device); | |
2944 | break; | |
2945 | default: | |
2946 | error_setg_errno(errp, -ret, "Could not resize"); | |
2947 | break; | |
2948 | } | |
2949 | ||
2950 | out: | |
2951 | aio_context_release(aio_context); | |
2952 | } | |
2953 | ||
2954 | static void block_job_cb(void *opaque, int ret) | |
2955 | { | |
2956 | /* Note that this function may be executed from another AioContext besides | |
2957 | * the QEMU main loop. If you need to access anything that assumes the | |
2958 | * QEMU global mutex, use a BH or introduce a mutex. | |
2959 | */ | |
2960 | ||
2961 | BlockDriverState *bs = opaque; | |
2962 | const char *msg = NULL; | |
2963 | ||
2964 | trace_block_job_cb(bs, bs->job, ret); | |
2965 | ||
2966 | assert(bs->job); | |
2967 | ||
2968 | if (ret < 0) { | |
2969 | msg = strerror(-ret); | |
2970 | } | |
2971 | ||
2972 | if (block_job_is_cancelled(bs->job)) { | |
2973 | block_job_event_cancelled(bs->job); | |
2974 | } else { | |
2975 | block_job_event_completed(bs->job, msg); | |
2976 | } | |
2977 | } | |
2978 | ||
2979 | void qmp_block_stream(bool has_job_id, const char *job_id, const char *device, | |
2980 | bool has_base, const char *base, | |
2981 | bool has_backing_file, const char *backing_file, | |
2982 | bool has_speed, int64_t speed, | |
2983 | bool has_on_error, BlockdevOnError on_error, | |
2984 | Error **errp) | |
2985 | { | |
2986 | BlockBackend *blk; | |
2987 | BlockDriverState *bs; | |
2988 | BlockDriverState *base_bs = NULL; | |
2989 | AioContext *aio_context; | |
2990 | Error *local_err = NULL; | |
2991 | const char *base_name = NULL; | |
2992 | ||
2993 | if (!has_on_error) { | |
2994 | on_error = BLOCKDEV_ON_ERROR_REPORT; | |
2995 | } | |
2996 | ||
2997 | blk = blk_by_name(device); | |
2998 | if (!blk) { | |
2999 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
3000 | "Device '%s' not found", device); | |
3001 | return; | |
3002 | } | |
3003 | ||
3004 | aio_context = blk_get_aio_context(blk); | |
3005 | aio_context_acquire(aio_context); | |
3006 | ||
3007 | if (!blk_is_available(blk)) { | |
3008 | error_setg(errp, "Device '%s' has no medium", device); | |
3009 | goto out; | |
3010 | } | |
3011 | bs = blk_bs(blk); | |
3012 | ||
3013 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_STREAM, errp)) { | |
3014 | goto out; | |
3015 | } | |
3016 | ||
3017 | if (has_base) { | |
3018 | base_bs = bdrv_find_backing_image(bs, base); | |
3019 | if (base_bs == NULL) { | |
3020 | error_setg(errp, QERR_BASE_NOT_FOUND, base); | |
3021 | goto out; | |
3022 | } | |
3023 | assert(bdrv_get_aio_context(base_bs) == aio_context); | |
3024 | base_name = base; | |
3025 | } | |
3026 | ||
3027 | /* if we are streaming the entire chain, the result will have no backing | |
3028 | * file, and specifying one is therefore an error */ | |
3029 | if (base_bs == NULL && has_backing_file) { | |
3030 | error_setg(errp, "backing file specified, but streaming the " | |
3031 | "entire chain"); | |
3032 | goto out; | |
3033 | } | |
3034 | ||
3035 | /* backing_file string overrides base bs filename */ | |
3036 | base_name = has_backing_file ? backing_file : base_name; | |
3037 | ||
3038 | stream_start(has_job_id ? job_id : NULL, bs, base_bs, base_name, | |
3039 | has_speed ? speed : 0, on_error, block_job_cb, bs, &local_err); | |
3040 | if (local_err) { | |
3041 | error_propagate(errp, local_err); | |
3042 | goto out; | |
3043 | } | |
3044 | ||
3045 | trace_qmp_block_stream(bs, bs->job); | |
3046 | ||
3047 | out: | |
3048 | aio_context_release(aio_context); | |
3049 | } | |
3050 | ||
3051 | void qmp_block_commit(bool has_job_id, const char *job_id, const char *device, | |
3052 | bool has_base, const char *base, | |
3053 | bool has_top, const char *top, | |
3054 | bool has_backing_file, const char *backing_file, | |
3055 | bool has_speed, int64_t speed, | |
3056 | Error **errp) | |
3057 | { | |
3058 | BlockBackend *blk; | |
3059 | BlockDriverState *bs; | |
3060 | BlockDriverState *base_bs, *top_bs; | |
3061 | AioContext *aio_context; | |
3062 | Error *local_err = NULL; | |
3063 | /* This will be part of the QMP command, if/when the | |
3064 | * BlockdevOnError change for blkmirror makes it in | |
3065 | */ | |
3066 | BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT; | |
3067 | ||
3068 | if (!has_speed) { | |
3069 | speed = 0; | |
3070 | } | |
3071 | ||
3072 | /* Important Note: | |
3073 | * libvirt relies on the DeviceNotFound error class in order to probe for | |
3074 | * live commit feature versions; for this to work, we must make sure to | |
3075 | * perform the device lookup before any generic errors that may occur in a | |
3076 | * scenario in which all optional arguments are omitted. */ | |
3077 | blk = blk_by_name(device); | |
3078 | if (!blk) { | |
3079 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
3080 | "Device '%s' not found", device); | |
3081 | return; | |
3082 | } | |
3083 | ||
3084 | aio_context = blk_get_aio_context(blk); | |
3085 | aio_context_acquire(aio_context); | |
3086 | ||
3087 | if (!blk_is_available(blk)) { | |
3088 | error_setg(errp, "Device '%s' has no medium", device); | |
3089 | goto out; | |
3090 | } | |
3091 | bs = blk_bs(blk); | |
3092 | ||
3093 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, errp)) { | |
3094 | goto out; | |
3095 | } | |
3096 | ||
3097 | /* default top_bs is the active layer */ | |
3098 | top_bs = bs; | |
3099 | ||
3100 | if (has_top && top) { | |
3101 | if (strcmp(bs->filename, top) != 0) { | |
3102 | top_bs = bdrv_find_backing_image(bs, top); | |
3103 | } | |
3104 | } | |
3105 | ||
3106 | if (top_bs == NULL) { | |
3107 | error_setg(errp, "Top image file %s not found", top ? top : "NULL"); | |
3108 | goto out; | |
3109 | } | |
3110 | ||
3111 | assert(bdrv_get_aio_context(top_bs) == aio_context); | |
3112 | ||
3113 | if (has_base && base) { | |
3114 | base_bs = bdrv_find_backing_image(top_bs, base); | |
3115 | } else { | |
3116 | base_bs = bdrv_find_base(top_bs); | |
3117 | } | |
3118 | ||
3119 | if (base_bs == NULL) { | |
3120 | error_setg(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL"); | |
3121 | goto out; | |
3122 | } | |
3123 | ||
3124 | assert(bdrv_get_aio_context(base_bs) == aio_context); | |
3125 | ||
3126 | if (bdrv_op_is_blocked(base_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) { | |
3127 | goto out; | |
3128 | } | |
3129 | ||
3130 | /* Do not allow attempts to commit an image into itself */ | |
3131 | if (top_bs == base_bs) { | |
3132 | error_setg(errp, "cannot commit an image into itself"); | |
3133 | goto out; | |
3134 | } | |
3135 | ||
3136 | if (top_bs == bs) { | |
3137 | if (has_backing_file) { | |
3138 | error_setg(errp, "'backing-file' specified," | |
3139 | " but 'top' is the active layer"); | |
3140 | goto out; | |
3141 | } | |
3142 | commit_active_start(has_job_id ? job_id : NULL, bs, base_bs, speed, | |
3143 | on_error, block_job_cb, bs, &local_err); | |
3144 | } else { | |
3145 | commit_start(has_job_id ? job_id : NULL, bs, base_bs, top_bs, speed, | |
3146 | on_error, block_job_cb, bs, | |
3147 | has_backing_file ? backing_file : NULL, &local_err); | |
3148 | } | |
3149 | if (local_err != NULL) { | |
3150 | error_propagate(errp, local_err); | |
3151 | goto out; | |
3152 | } | |
3153 | ||
3154 | out: | |
3155 | aio_context_release(aio_context); | |
3156 | } | |
3157 | ||
3158 | static void do_drive_backup(const char *job_id, const char *device, | |
3159 | const char *target, bool has_format, | |
3160 | const char *format, enum MirrorSyncMode sync, | |
3161 | bool has_mode, enum NewImageMode mode, | |
3162 | bool has_speed, int64_t speed, | |
3163 | bool has_bitmap, const char *bitmap, | |
3164 | bool has_on_source_error, | |
3165 | BlockdevOnError on_source_error, | |
3166 | bool has_on_target_error, | |
3167 | BlockdevOnError on_target_error, | |
3168 | BlockJobTxn *txn, Error **errp) | |
3169 | { | |
3170 | BlockBackend *blk; | |
3171 | BlockDriverState *bs; | |
3172 | BlockDriverState *target_bs; | |
3173 | BlockDriverState *source = NULL; | |
3174 | BdrvDirtyBitmap *bmap = NULL; | |
3175 | AioContext *aio_context; | |
3176 | QDict *options = NULL; | |
3177 | Error *local_err = NULL; | |
3178 | int flags; | |
3179 | int64_t size; | |
3180 | ||
3181 | if (!has_speed) { | |
3182 | speed = 0; | |
3183 | } | |
3184 | if (!has_on_source_error) { | |
3185 | on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
3186 | } | |
3187 | if (!has_on_target_error) { | |
3188 | on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
3189 | } | |
3190 | if (!has_mode) { | |
3191 | mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
3192 | } | |
3193 | ||
3194 | blk = blk_by_name(device); | |
3195 | if (!blk) { | |
3196 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
3197 | "Device '%s' not found", device); | |
3198 | return; | |
3199 | } | |
3200 | ||
3201 | aio_context = blk_get_aio_context(blk); | |
3202 | aio_context_acquire(aio_context); | |
3203 | ||
3204 | /* Although backup_run has this check too, we need to use bs->drv below, so | |
3205 | * do an early check redundantly. */ | |
3206 | if (!blk_is_available(blk)) { | |
3207 | error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
3208 | goto out; | |
3209 | } | |
3210 | bs = blk_bs(blk); | |
3211 | ||
3212 | if (!has_format) { | |
3213 | format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name; | |
3214 | } | |
3215 | ||
3216 | /* Early check to avoid creating target */ | |
3217 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) { | |
3218 | goto out; | |
3219 | } | |
3220 | ||
3221 | flags = bs->open_flags | BDRV_O_RDWR; | |
3222 | ||
3223 | /* See if we have a backing HD we can use to create our new image | |
3224 | * on top of. */ | |
3225 | if (sync == MIRROR_SYNC_MODE_TOP) { | |
3226 | source = backing_bs(bs); | |
3227 | if (!source) { | |
3228 | sync = MIRROR_SYNC_MODE_FULL; | |
3229 | } | |
3230 | } | |
3231 | if (sync == MIRROR_SYNC_MODE_NONE) { | |
3232 | source = bs; | |
3233 | } | |
3234 | ||
3235 | size = bdrv_getlength(bs); | |
3236 | if (size < 0) { | |
3237 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
3238 | goto out; | |
3239 | } | |
3240 | ||
3241 | if (mode != NEW_IMAGE_MODE_EXISTING) { | |
3242 | assert(format); | |
3243 | if (source) { | |
3244 | bdrv_img_create(target, format, source->filename, | |
3245 | source->drv->format_name, NULL, | |
3246 | size, flags, &local_err, false); | |
3247 | } else { | |
3248 | bdrv_img_create(target, format, NULL, NULL, NULL, | |
3249 | size, flags, &local_err, false); | |
3250 | } | |
3251 | } | |
3252 | ||
3253 | if (local_err) { | |
3254 | error_propagate(errp, local_err); | |
3255 | goto out; | |
3256 | } | |
3257 | ||
3258 | if (format) { | |
3259 | options = qdict_new(); | |
3260 | qdict_put(options, "driver", qstring_from_str(format)); | |
3261 | } | |
3262 | ||
3263 | target_bs = bdrv_open(target, NULL, options, flags, errp); | |
3264 | if (!target_bs) { | |
3265 | goto out; | |
3266 | } | |
3267 | ||
3268 | bdrv_set_aio_context(target_bs, aio_context); | |
3269 | ||
3270 | if (has_bitmap) { | |
3271 | bmap = bdrv_find_dirty_bitmap(bs, bitmap); | |
3272 | if (!bmap) { | |
3273 | error_setg(errp, "Bitmap '%s' could not be found", bitmap); | |
3274 | bdrv_unref(target_bs); | |
3275 | goto out; | |
3276 | } | |
3277 | } | |
3278 | ||
3279 | backup_start(job_id, bs, target_bs, speed, sync, bmap, | |
3280 | on_source_error, on_target_error, | |
3281 | block_job_cb, bs, txn, &local_err); | |
3282 | bdrv_unref(target_bs); | |
3283 | if (local_err != NULL) { | |
3284 | error_propagate(errp, local_err); | |
3285 | goto out; | |
3286 | } | |
3287 | ||
3288 | out: | |
3289 | aio_context_release(aio_context); | |
3290 | } | |
3291 | ||
3292 | void qmp_drive_backup(bool has_job_id, const char *job_id, | |
3293 | const char *device, const char *target, | |
3294 | bool has_format, const char *format, | |
3295 | enum MirrorSyncMode sync, | |
3296 | bool has_mode, enum NewImageMode mode, | |
3297 | bool has_speed, int64_t speed, | |
3298 | bool has_bitmap, const char *bitmap, | |
3299 | bool has_on_source_error, BlockdevOnError on_source_error, | |
3300 | bool has_on_target_error, BlockdevOnError on_target_error, | |
3301 | Error **errp) | |
3302 | { | |
3303 | return do_drive_backup(has_job_id ? job_id : NULL, device, target, | |
3304 | has_format, format, sync, | |
3305 | has_mode, mode, has_speed, speed, | |
3306 | has_bitmap, bitmap, | |
3307 | has_on_source_error, on_source_error, | |
3308 | has_on_target_error, on_target_error, | |
3309 | NULL, errp); | |
3310 | } | |
3311 | ||
3312 | BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp) | |
3313 | { | |
3314 | return bdrv_named_nodes_list(errp); | |
3315 | } | |
3316 | ||
3317 | void do_blockdev_backup(const char *job_id, const char *device, | |
3318 | const char *target, enum MirrorSyncMode sync, | |
3319 | bool has_speed, int64_t speed, | |
3320 | bool has_on_source_error, | |
3321 | BlockdevOnError on_source_error, | |
3322 | bool has_on_target_error, | |
3323 | BlockdevOnError on_target_error, | |
3324 | BlockJobTxn *txn, Error **errp) | |
3325 | { | |
3326 | BlockBackend *blk; | |
3327 | BlockDriverState *bs; | |
3328 | BlockDriverState *target_bs; | |
3329 | Error *local_err = NULL; | |
3330 | AioContext *aio_context; | |
3331 | ||
3332 | if (!has_speed) { | |
3333 | speed = 0; | |
3334 | } | |
3335 | if (!has_on_source_error) { | |
3336 | on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
3337 | } | |
3338 | if (!has_on_target_error) { | |
3339 | on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
3340 | } | |
3341 | ||
3342 | blk = blk_by_name(device); | |
3343 | if (!blk) { | |
3344 | error_setg(errp, "Device '%s' not found", device); | |
3345 | return; | |
3346 | } | |
3347 | ||
3348 | aio_context = blk_get_aio_context(blk); | |
3349 | aio_context_acquire(aio_context); | |
3350 | ||
3351 | if (!blk_is_available(blk)) { | |
3352 | error_setg(errp, "Device '%s' has no medium", device); | |
3353 | goto out; | |
3354 | } | |
3355 | bs = blk_bs(blk); | |
3356 | ||
3357 | target_bs = bdrv_lookup_bs(target, target, errp); | |
3358 | if (!target_bs) { | |
3359 | goto out; | |
3360 | } | |
3361 | ||
3362 | if (bdrv_get_aio_context(target_bs) != aio_context) { | |
3363 | if (!bdrv_has_blk(target_bs)) { | |
3364 | /* The target BDS is not attached, we can safely move it to another | |
3365 | * AioContext. */ | |
3366 | bdrv_set_aio_context(target_bs, aio_context); | |
3367 | } else { | |
3368 | error_setg(errp, "Target is attached to a different thread from " | |
3369 | "source."); | |
3370 | goto out; | |
3371 | } | |
3372 | } | |
3373 | backup_start(job_id, bs, target_bs, speed, sync, NULL, on_source_error, | |
3374 | on_target_error, block_job_cb, bs, txn, &local_err); | |
3375 | if (local_err != NULL) { | |
3376 | error_propagate(errp, local_err); | |
3377 | } | |
3378 | out: | |
3379 | aio_context_release(aio_context); | |
3380 | } | |
3381 | ||
3382 | void qmp_blockdev_backup(bool has_job_id, const char *job_id, | |
3383 | const char *device, const char *target, | |
3384 | enum MirrorSyncMode sync, | |
3385 | bool has_speed, int64_t speed, | |
3386 | bool has_on_source_error, | |
3387 | BlockdevOnError on_source_error, | |
3388 | bool has_on_target_error, | |
3389 | BlockdevOnError on_target_error, | |
3390 | Error **errp) | |
3391 | { | |
3392 | do_blockdev_backup(has_job_id ? job_id : NULL, device, target, | |
3393 | sync, has_speed, speed, | |
3394 | has_on_source_error, on_source_error, | |
3395 | has_on_target_error, on_target_error, | |
3396 | NULL, errp); | |
3397 | } | |
3398 | ||
3399 | /* Parameter check and block job starting for drive mirroring. | |
3400 | * Caller should hold @device and @target's aio context (must be the same). | |
3401 | **/ | |
3402 | static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs, | |
3403 | BlockDriverState *target, | |
3404 | bool has_replaces, const char *replaces, | |
3405 | enum MirrorSyncMode sync, | |
3406 | BlockMirrorBackingMode backing_mode, | |
3407 | bool has_speed, int64_t speed, | |
3408 | bool has_granularity, uint32_t granularity, | |
3409 | bool has_buf_size, int64_t buf_size, | |
3410 | bool has_on_source_error, | |
3411 | BlockdevOnError on_source_error, | |
3412 | bool has_on_target_error, | |
3413 | BlockdevOnError on_target_error, | |
3414 | bool has_unmap, bool unmap, | |
3415 | Error **errp) | |
3416 | { | |
3417 | ||
3418 | if (!has_speed) { | |
3419 | speed = 0; | |
3420 | } | |
3421 | if (!has_on_source_error) { | |
3422 | on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
3423 | } | |
3424 | if (!has_on_target_error) { | |
3425 | on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
3426 | } | |
3427 | if (!has_granularity) { | |
3428 | granularity = 0; | |
3429 | } | |
3430 | if (!has_buf_size) { | |
3431 | buf_size = 0; | |
3432 | } | |
3433 | if (!has_unmap) { | |
3434 | unmap = true; | |
3435 | } | |
3436 | ||
3437 | if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) { | |
3438 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity", | |
3439 | "a value in range [512B, 64MB]"); | |
3440 | return; | |
3441 | } | |
3442 | if (granularity & (granularity - 1)) { | |
3443 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity", | |
3444 | "power of 2"); | |
3445 | return; | |
3446 | } | |
3447 | ||
3448 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) { | |
3449 | return; | |
3450 | } | |
3451 | if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_MIRROR_TARGET, errp)) { | |
3452 | return; | |
3453 | } | |
3454 | ||
3455 | if (!bs->backing && sync == MIRROR_SYNC_MODE_TOP) { | |
3456 | sync = MIRROR_SYNC_MODE_FULL; | |
3457 | } | |
3458 | ||
3459 | /* pass the node name to replace to mirror start since it's loose coupling | |
3460 | * and will allow to check whether the node still exist at mirror completion | |
3461 | */ | |
3462 | mirror_start(job_id, bs, target, | |
3463 | has_replaces ? replaces : NULL, | |
3464 | speed, granularity, buf_size, sync, backing_mode, | |
3465 | on_source_error, on_target_error, unmap, | |
3466 | block_job_cb, bs, errp); | |
3467 | } | |
3468 | ||
3469 | void qmp_drive_mirror(bool has_job_id, const char *job_id, const char *device, | |
3470 | const char *target, bool has_format, const char *format, | |
3471 | bool has_node_name, const char *node_name, | |
3472 | bool has_replaces, const char *replaces, | |
3473 | enum MirrorSyncMode sync, | |
3474 | bool has_mode, enum NewImageMode mode, | |
3475 | bool has_speed, int64_t speed, | |
3476 | bool has_granularity, uint32_t granularity, | |
3477 | bool has_buf_size, int64_t buf_size, | |
3478 | bool has_on_source_error, BlockdevOnError on_source_error, | |
3479 | bool has_on_target_error, BlockdevOnError on_target_error, | |
3480 | bool has_unmap, bool unmap, | |
3481 | Error **errp) | |
3482 | { | |
3483 | BlockDriverState *bs; | |
3484 | BlockBackend *blk; | |
3485 | BlockDriverState *source, *target_bs; | |
3486 | AioContext *aio_context; | |
3487 | BlockMirrorBackingMode backing_mode; | |
3488 | Error *local_err = NULL; | |
3489 | QDict *options = NULL; | |
3490 | int flags; | |
3491 | int64_t size; | |
3492 | ||
3493 | blk = blk_by_name(device); | |
3494 | if (!blk) { | |
3495 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
3496 | "Device '%s' not found", device); | |
3497 | return; | |
3498 | } | |
3499 | ||
3500 | aio_context = blk_get_aio_context(blk); | |
3501 | aio_context_acquire(aio_context); | |
3502 | ||
3503 | if (!blk_is_available(blk)) { | |
3504 | error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
3505 | goto out; | |
3506 | } | |
3507 | bs = blk_bs(blk); | |
3508 | if (!has_mode) { | |
3509 | mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
3510 | } | |
3511 | ||
3512 | if (!has_format) { | |
3513 | format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name; | |
3514 | } | |
3515 | ||
3516 | flags = bs->open_flags | BDRV_O_RDWR; | |
3517 | source = backing_bs(bs); | |
3518 | if (!source && sync == MIRROR_SYNC_MODE_TOP) { | |
3519 | sync = MIRROR_SYNC_MODE_FULL; | |
3520 | } | |
3521 | if (sync == MIRROR_SYNC_MODE_NONE) { | |
3522 | source = bs; | |
3523 | } | |
3524 | ||
3525 | size = bdrv_getlength(bs); | |
3526 | if (size < 0) { | |
3527 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
3528 | goto out; | |
3529 | } | |
3530 | ||
3531 | if (has_replaces) { | |
3532 | BlockDriverState *to_replace_bs; | |
3533 | AioContext *replace_aio_context; | |
3534 | int64_t replace_size; | |
3535 | ||
3536 | if (!has_node_name) { | |
3537 | error_setg(errp, "a node-name must be provided when replacing a" | |
3538 | " named node of the graph"); | |
3539 | goto out; | |
3540 | } | |
3541 | ||
3542 | to_replace_bs = check_to_replace_node(bs, replaces, &local_err); | |
3543 | ||
3544 | if (!to_replace_bs) { | |
3545 | error_propagate(errp, local_err); | |
3546 | goto out; | |
3547 | } | |
3548 | ||
3549 | replace_aio_context = bdrv_get_aio_context(to_replace_bs); | |
3550 | aio_context_acquire(replace_aio_context); | |
3551 | replace_size = bdrv_getlength(to_replace_bs); | |
3552 | aio_context_release(replace_aio_context); | |
3553 | ||
3554 | if (size != replace_size) { | |
3555 | error_setg(errp, "cannot replace image with a mirror image of " | |
3556 | "different size"); | |
3557 | goto out; | |
3558 | } | |
3559 | } | |
3560 | ||
3561 | if (mode == NEW_IMAGE_MODE_ABSOLUTE_PATHS) { | |
3562 | backing_mode = MIRROR_SOURCE_BACKING_CHAIN; | |
3563 | } else { | |
3564 | backing_mode = MIRROR_OPEN_BACKING_CHAIN; | |
3565 | } | |
3566 | ||
3567 | if ((sync == MIRROR_SYNC_MODE_FULL || !source) | |
3568 | && mode != NEW_IMAGE_MODE_EXISTING) | |
3569 | { | |
3570 | /* create new image w/o backing file */ | |
3571 | assert(format); | |
3572 | bdrv_img_create(target, format, | |
3573 | NULL, NULL, NULL, size, flags, &local_err, false); | |
3574 | } else { | |
3575 | switch (mode) { | |
3576 | case NEW_IMAGE_MODE_EXISTING: | |
3577 | break; | |
3578 | case NEW_IMAGE_MODE_ABSOLUTE_PATHS: | |
3579 | /* create new image with backing file */ | |
3580 | bdrv_img_create(target, format, | |
3581 | source->filename, | |
3582 | source->drv->format_name, | |
3583 | NULL, size, flags, &local_err, false); | |
3584 | break; | |
3585 | default: | |
3586 | abort(); | |
3587 | } | |
3588 | } | |
3589 | ||
3590 | if (local_err) { | |
3591 | error_propagate(errp, local_err); | |
3592 | goto out; | |
3593 | } | |
3594 | ||
3595 | options = qdict_new(); | |
3596 | if (has_node_name) { | |
3597 | qdict_put(options, "node-name", qstring_from_str(node_name)); | |
3598 | } | |
3599 | if (format) { | |
3600 | qdict_put(options, "driver", qstring_from_str(format)); | |
3601 | } | |
3602 | ||
3603 | /* Mirroring takes care of copy-on-write using the source's backing | |
3604 | * file. | |
3605 | */ | |
3606 | target_bs = bdrv_open(target, NULL, options, flags | BDRV_O_NO_BACKING, | |
3607 | errp); | |
3608 | if (!target_bs) { | |
3609 | goto out; | |
3610 | } | |
3611 | ||
3612 | bdrv_set_aio_context(target_bs, aio_context); | |
3613 | ||
3614 | blockdev_mirror_common(has_job_id ? job_id : NULL, bs, target_bs, | |
3615 | has_replaces, replaces, sync, backing_mode, | |
3616 | has_speed, speed, | |
3617 | has_granularity, granularity, | |
3618 | has_buf_size, buf_size, | |
3619 | has_on_source_error, on_source_error, | |
3620 | has_on_target_error, on_target_error, | |
3621 | has_unmap, unmap, | |
3622 | &local_err); | |
3623 | bdrv_unref(target_bs); | |
3624 | error_propagate(errp, local_err); | |
3625 | out: | |
3626 | aio_context_release(aio_context); | |
3627 | } | |
3628 | ||
3629 | void qmp_blockdev_mirror(bool has_job_id, const char *job_id, | |
3630 | const char *device, const char *target, | |
3631 | bool has_replaces, const char *replaces, | |
3632 | MirrorSyncMode sync, | |
3633 | bool has_speed, int64_t speed, | |
3634 | bool has_granularity, uint32_t granularity, | |
3635 | bool has_buf_size, int64_t buf_size, | |
3636 | bool has_on_source_error, | |
3637 | BlockdevOnError on_source_error, | |
3638 | bool has_on_target_error, | |
3639 | BlockdevOnError on_target_error, | |
3640 | Error **errp) | |
3641 | { | |
3642 | BlockDriverState *bs; | |
3643 | BlockBackend *blk; | |
3644 | BlockDriverState *target_bs; | |
3645 | AioContext *aio_context; | |
3646 | BlockMirrorBackingMode backing_mode = MIRROR_LEAVE_BACKING_CHAIN; | |
3647 | Error *local_err = NULL; | |
3648 | ||
3649 | blk = blk_by_name(device); | |
3650 | if (!blk) { | |
3651 | error_setg(errp, "Device '%s' not found", device); | |
3652 | return; | |
3653 | } | |
3654 | bs = blk_bs(blk); | |
3655 | ||
3656 | if (!bs) { | |
3657 | error_setg(errp, "Device '%s' has no media", device); | |
3658 | return; | |
3659 | } | |
3660 | ||
3661 | target_bs = bdrv_lookup_bs(target, target, errp); | |
3662 | if (!target_bs) { | |
3663 | return; | |
3664 | } | |
3665 | ||
3666 | aio_context = bdrv_get_aio_context(bs); | |
3667 | aio_context_acquire(aio_context); | |
3668 | ||
3669 | bdrv_set_aio_context(target_bs, aio_context); | |
3670 | ||
3671 | blockdev_mirror_common(has_job_id ? job_id : NULL, bs, target_bs, | |
3672 | has_replaces, replaces, sync, backing_mode, | |
3673 | has_speed, speed, | |
3674 | has_granularity, granularity, | |
3675 | has_buf_size, buf_size, | |
3676 | has_on_source_error, on_source_error, | |
3677 | has_on_target_error, on_target_error, | |
3678 | true, true, | |
3679 | &local_err); | |
3680 | error_propagate(errp, local_err); | |
3681 | ||
3682 | aio_context_release(aio_context); | |
3683 | } | |
3684 | ||
3685 | /* Get a block job using its ID and acquire its AioContext */ | |
3686 | static BlockJob *find_block_job(const char *id, AioContext **aio_context, | |
3687 | Error **errp) | |
3688 | { | |
3689 | BlockJob *job; | |
3690 | ||
3691 | assert(id != NULL); | |
3692 | ||
3693 | *aio_context = NULL; | |
3694 | ||
3695 | job = block_job_get(id); | |
3696 | ||
3697 | if (!job) { | |
3698 | error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE, | |
3699 | "Block job '%s' not found", id); | |
3700 | return NULL; | |
3701 | } | |
3702 | ||
3703 | *aio_context = blk_get_aio_context(job->blk); | |
3704 | aio_context_acquire(*aio_context); | |
3705 | ||
3706 | return job; | |
3707 | } | |
3708 | ||
3709 | void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) | |
3710 | { | |
3711 | AioContext *aio_context; | |
3712 | BlockJob *job = find_block_job(device, &aio_context, errp); | |
3713 | ||
3714 | if (!job) { | |
3715 | return; | |
3716 | } | |
3717 | ||
3718 | block_job_set_speed(job, speed, errp); | |
3719 | aio_context_release(aio_context); | |
3720 | } | |
3721 | ||
3722 | void qmp_block_job_cancel(const char *device, | |
3723 | bool has_force, bool force, Error **errp) | |
3724 | { | |
3725 | AioContext *aio_context; | |
3726 | BlockJob *job = find_block_job(device, &aio_context, errp); | |
3727 | ||
3728 | if (!job) { | |
3729 | return; | |
3730 | } | |
3731 | ||
3732 | if (!has_force) { | |
3733 | force = false; | |
3734 | } | |
3735 | ||
3736 | if (job->user_paused && !force) { | |
3737 | error_setg(errp, "The block job for device '%s' is currently paused", | |
3738 | device); | |
3739 | goto out; | |
3740 | } | |
3741 | ||
3742 | trace_qmp_block_job_cancel(job); | |
3743 | block_job_cancel(job); | |
3744 | out: | |
3745 | aio_context_release(aio_context); | |
3746 | } | |
3747 | ||
3748 | void qmp_block_job_pause(const char *device, Error **errp) | |
3749 | { | |
3750 | AioContext *aio_context; | |
3751 | BlockJob *job = find_block_job(device, &aio_context, errp); | |
3752 | ||
3753 | if (!job || job->user_paused) { | |
3754 | return; | |
3755 | } | |
3756 | ||
3757 | job->user_paused = true; | |
3758 | trace_qmp_block_job_pause(job); | |
3759 | block_job_pause(job); | |
3760 | aio_context_release(aio_context); | |
3761 | } | |
3762 | ||
3763 | void qmp_block_job_resume(const char *device, Error **errp) | |
3764 | { | |
3765 | AioContext *aio_context; | |
3766 | BlockJob *job = find_block_job(device, &aio_context, errp); | |
3767 | ||
3768 | if (!job || !job->user_paused) { | |
3769 | return; | |
3770 | } | |
3771 | ||
3772 | job->user_paused = false; | |
3773 | trace_qmp_block_job_resume(job); | |
3774 | block_job_iostatus_reset(job); | |
3775 | block_job_resume(job); | |
3776 | aio_context_release(aio_context); | |
3777 | } | |
3778 | ||
3779 | void qmp_block_job_complete(const char *device, Error **errp) | |
3780 | { | |
3781 | AioContext *aio_context; | |
3782 | BlockJob *job = find_block_job(device, &aio_context, errp); | |
3783 | ||
3784 | if (!job) { | |
3785 | return; | |
3786 | } | |
3787 | ||
3788 | trace_qmp_block_job_complete(job); | |
3789 | block_job_complete(job, errp); | |
3790 | aio_context_release(aio_context); | |
3791 | } | |
3792 | ||
3793 | void qmp_change_backing_file(const char *device, | |
3794 | const char *image_node_name, | |
3795 | const char *backing_file, | |
3796 | Error **errp) | |
3797 | { | |
3798 | BlockBackend *blk; | |
3799 | BlockDriverState *bs = NULL; | |
3800 | AioContext *aio_context; | |
3801 | BlockDriverState *image_bs = NULL; | |
3802 | Error *local_err = NULL; | |
3803 | bool ro; | |
3804 | int open_flags; | |
3805 | int ret; | |
3806 | ||
3807 | blk = blk_by_name(device); | |
3808 | if (!blk) { | |
3809 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
3810 | "Device '%s' not found", device); | |
3811 | return; | |
3812 | } | |
3813 | ||
3814 | aio_context = blk_get_aio_context(blk); | |
3815 | aio_context_acquire(aio_context); | |
3816 | ||
3817 | if (!blk_is_available(blk)) { | |
3818 | error_setg(errp, "Device '%s' has no medium", device); | |
3819 | goto out; | |
3820 | } | |
3821 | bs = blk_bs(blk); | |
3822 | ||
3823 | image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err); | |
3824 | if (local_err) { | |
3825 | error_propagate(errp, local_err); | |
3826 | goto out; | |
3827 | } | |
3828 | ||
3829 | if (!image_bs) { | |
3830 | error_setg(errp, "image file not found"); | |
3831 | goto out; | |
3832 | } | |
3833 | ||
3834 | if (bdrv_find_base(image_bs) == image_bs) { | |
3835 | error_setg(errp, "not allowing backing file change on an image " | |
3836 | "without a backing file"); | |
3837 | goto out; | |
3838 | } | |
3839 | ||
3840 | /* even though we are not necessarily operating on bs, we need it to | |
3841 | * determine if block ops are currently prohibited on the chain */ | |
3842 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) { | |
3843 | goto out; | |
3844 | } | |
3845 | ||
3846 | /* final sanity check */ | |
3847 | if (!bdrv_chain_contains(bs, image_bs)) { | |
3848 | error_setg(errp, "'%s' and image file are not in the same chain", | |
3849 | device); | |
3850 | goto out; | |
3851 | } | |
3852 | ||
3853 | /* if not r/w, reopen to make r/w */ | |
3854 | open_flags = image_bs->open_flags; | |
3855 | ro = bdrv_is_read_only(image_bs); | |
3856 | ||
3857 | if (ro) { | |
3858 | bdrv_reopen(image_bs, open_flags | BDRV_O_RDWR, &local_err); | |
3859 | if (local_err) { | |
3860 | error_propagate(errp, local_err); | |
3861 | goto out; | |
3862 | } | |
3863 | } | |
3864 | ||
3865 | ret = bdrv_change_backing_file(image_bs, backing_file, | |
3866 | image_bs->drv ? image_bs->drv->format_name : ""); | |
3867 | ||
3868 | if (ret < 0) { | |
3869 | error_setg_errno(errp, -ret, "Could not change backing file to '%s'", | |
3870 | backing_file); | |
3871 | /* don't exit here, so we can try to restore open flags if | |
3872 | * appropriate */ | |
3873 | } | |
3874 | ||
3875 | if (ro) { | |
3876 | bdrv_reopen(image_bs, open_flags, &local_err); | |
3877 | error_propagate(errp, local_err); | |
3878 | } | |
3879 | ||
3880 | out: | |
3881 | aio_context_release(aio_context); | |
3882 | } | |
3883 | ||
3884 | void hmp_drive_add_node(Monitor *mon, const char *optstr) | |
3885 | { | |
3886 | QemuOpts *opts; | |
3887 | QDict *qdict; | |
3888 | Error *local_err = NULL; | |
3889 | ||
3890 | opts = qemu_opts_parse_noisily(&qemu_drive_opts, optstr, false); | |
3891 | if (!opts) { | |
3892 | return; | |
3893 | } | |
3894 | ||
3895 | qdict = qemu_opts_to_qdict(opts, NULL); | |
3896 | ||
3897 | if (!qdict_get_try_str(qdict, "node-name")) { | |
3898 | QDECREF(qdict); | |
3899 | error_report("'node-name' needs to be specified"); | |
3900 | goto out; | |
3901 | } | |
3902 | ||
3903 | BlockDriverState *bs = bds_tree_init(qdict, &local_err); | |
3904 | if (!bs) { | |
3905 | error_report_err(local_err); | |
3906 | goto out; | |
3907 | } | |
3908 | ||
3909 | QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list); | |
3910 | ||
3911 | out: | |
3912 | qemu_opts_del(opts); | |
3913 | } | |
3914 | ||
3915 | void qmp_blockdev_add(BlockdevOptions *options, Error **errp) | |
3916 | { | |
3917 | BlockDriverState *bs; | |
3918 | BlockBackend *blk = NULL; | |
3919 | QObject *obj; | |
3920 | Visitor *v = qmp_output_visitor_new(&obj); | |
3921 | QDict *qdict; | |
3922 | Error *local_err = NULL; | |
3923 | ||
3924 | /* TODO Sort it out in raw-posix and drive_new(): Reject aio=native with | |
3925 | * cache.direct=false instead of silently switching to aio=threads, except | |
3926 | * when called from drive_new(). | |
3927 | * | |
3928 | * For now, simply forbidding the combination for all drivers will do. */ | |
3929 | if (options->has_aio && options->aio == BLOCKDEV_AIO_OPTIONS_NATIVE) { | |
3930 | bool direct = options->has_cache && | |
3931 | options->cache->has_direct && | |
3932 | options->cache->direct; | |
3933 | if (!direct) { | |
3934 | error_setg(errp, "aio=native requires cache.direct=true"); | |
3935 | goto fail; | |
3936 | } | |
3937 | } | |
3938 | ||
3939 | visit_type_BlockdevOptions(v, NULL, &options, &local_err); | |
3940 | if (local_err) { | |
3941 | error_propagate(errp, local_err); | |
3942 | goto fail; | |
3943 | } | |
3944 | ||
3945 | visit_complete(v, &obj); | |
3946 | qdict = qobject_to_qdict(obj); | |
3947 | ||
3948 | qdict_flatten(qdict); | |
3949 | ||
3950 | if (options->has_id) { | |
3951 | blk = blockdev_init(NULL, qdict, &local_err); | |
3952 | if (local_err) { | |
3953 | error_propagate(errp, local_err); | |
3954 | goto fail; | |
3955 | } | |
3956 | ||
3957 | bs = blk_bs(blk); | |
3958 | } else { | |
3959 | if (!qdict_get_try_str(qdict, "node-name")) { | |
3960 | error_setg(errp, "'id' and/or 'node-name' need to be specified for " | |
3961 | "the root node"); | |
3962 | goto fail; | |
3963 | } | |
3964 | ||
3965 | bs = bds_tree_init(qdict, errp); | |
3966 | if (!bs) { | |
3967 | goto fail; | |
3968 | } | |
3969 | ||
3970 | QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list); | |
3971 | } | |
3972 | ||
3973 | if (bs && bdrv_key_required(bs)) { | |
3974 | if (blk) { | |
3975 | monitor_remove_blk(blk); | |
3976 | blk_unref(blk); | |
3977 | } else { | |
3978 | QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list); | |
3979 | bdrv_unref(bs); | |
3980 | } | |
3981 | error_setg(errp, "blockdev-add doesn't support encrypted devices"); | |
3982 | goto fail; | |
3983 | } | |
3984 | ||
3985 | fail: | |
3986 | visit_free(v); | |
3987 | } | |
3988 | ||
3989 | void qmp_x_blockdev_del(bool has_id, const char *id, | |
3990 | bool has_node_name, const char *node_name, Error **errp) | |
3991 | { | |
3992 | AioContext *aio_context; | |
3993 | BlockBackend *blk; | |
3994 | BlockDriverState *bs; | |
3995 | ||
3996 | if (has_id && has_node_name) { | |
3997 | error_setg(errp, "Only one of id and node-name must be specified"); | |
3998 | return; | |
3999 | } else if (!has_id && !has_node_name) { | |
4000 | error_setg(errp, "No block device specified"); | |
4001 | return; | |
4002 | } | |
4003 | ||
4004 | if (has_id) { | |
4005 | /* blk_by_name() never returns a BB that is not owned by the monitor */ | |
4006 | blk = blk_by_name(id); | |
4007 | if (!blk) { | |
4008 | error_setg(errp, "Cannot find block backend %s", id); | |
4009 | return; | |
4010 | } | |
4011 | if (blk_legacy_dinfo(blk)) { | |
4012 | error_setg(errp, "Deleting block backend added with drive-add" | |
4013 | " is not supported"); | |
4014 | return; | |
4015 | } | |
4016 | if (blk_get_refcnt(blk) > 1) { | |
4017 | error_setg(errp, "Block backend %s is in use", id); | |
4018 | return; | |
4019 | } | |
4020 | bs = blk_bs(blk); | |
4021 | aio_context = blk_get_aio_context(blk); | |
4022 | } else { | |
4023 | blk = NULL; | |
4024 | bs = bdrv_find_node(node_name); | |
4025 | if (!bs) { | |
4026 | error_setg(errp, "Cannot find node %s", node_name); | |
4027 | return; | |
4028 | } | |
4029 | if (bdrv_has_blk(bs)) { | |
4030 | error_setg(errp, "Node %s is in use by %s", | |
4031 | node_name, bdrv_get_parent_name(bs)); | |
4032 | return; | |
4033 | } | |
4034 | aio_context = bdrv_get_aio_context(bs); | |
4035 | } | |
4036 | ||
4037 | aio_context_acquire(aio_context); | |
4038 | ||
4039 | if (bs) { | |
4040 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, errp)) { | |
4041 | goto out; | |
4042 | } | |
4043 | ||
4044 | if (!blk && !bs->monitor_list.tqe_prev) { | |
4045 | error_setg(errp, "Node %s is not owned by the monitor", | |
4046 | bs->node_name); | |
4047 | goto out; | |
4048 | } | |
4049 | ||
4050 | if (bs->refcnt > 1) { | |
4051 | error_setg(errp, "Block device %s is in use", | |
4052 | bdrv_get_device_or_node_name(bs)); | |
4053 | goto out; | |
4054 | } | |
4055 | } | |
4056 | ||
4057 | if (blk) { | |
4058 | monitor_remove_blk(blk); | |
4059 | blk_unref(blk); | |
4060 | } else { | |
4061 | QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list); | |
4062 | bdrv_unref(bs); | |
4063 | } | |
4064 | ||
4065 | out: | |
4066 | aio_context_release(aio_context); | |
4067 | } | |
4068 | ||
4069 | static BdrvChild *bdrv_find_child(BlockDriverState *parent_bs, | |
4070 | const char *child_name) | |
4071 | { | |
4072 | BdrvChild *child; | |
4073 | ||
4074 | QLIST_FOREACH(child, &parent_bs->children, next) { | |
4075 | if (strcmp(child->name, child_name) == 0) { | |
4076 | return child; | |
4077 | } | |
4078 | } | |
4079 | ||
4080 | return NULL; | |
4081 | } | |
4082 | ||
4083 | void qmp_x_blockdev_change(const char *parent, bool has_child, | |
4084 | const char *child, bool has_node, | |
4085 | const char *node, Error **errp) | |
4086 | { | |
4087 | BlockDriverState *parent_bs, *new_bs = NULL; | |
4088 | BdrvChild *p_child; | |
4089 | ||
4090 | parent_bs = bdrv_lookup_bs(parent, parent, errp); | |
4091 | if (!parent_bs) { | |
4092 | return; | |
4093 | } | |
4094 | ||
4095 | if (has_child == has_node) { | |
4096 | if (has_child) { | |
4097 | error_setg(errp, "The parameters child and node are in conflict"); | |
4098 | } else { | |
4099 | error_setg(errp, "Either child or node must be specified"); | |
4100 | } | |
4101 | return; | |
4102 | } | |
4103 | ||
4104 | if (has_child) { | |
4105 | p_child = bdrv_find_child(parent_bs, child); | |
4106 | if (!p_child) { | |
4107 | error_setg(errp, "Node '%s' does not have child '%s'", | |
4108 | parent, child); | |
4109 | return; | |
4110 | } | |
4111 | bdrv_del_child(parent_bs, p_child, errp); | |
4112 | } | |
4113 | ||
4114 | if (has_node) { | |
4115 | new_bs = bdrv_find_node(node); | |
4116 | if (!new_bs) { | |
4117 | error_setg(errp, "Node '%s' not found", node); | |
4118 | return; | |
4119 | } | |
4120 | bdrv_add_child(parent_bs, new_bs, errp); | |
4121 | } | |
4122 | } | |
4123 | ||
4124 | BlockJobInfoList *qmp_query_block_jobs(Error **errp) | |
4125 | { | |
4126 | BlockJobInfoList *head = NULL, **p_next = &head; | |
4127 | BlockJob *job; | |
4128 | ||
4129 | for (job = block_job_next(NULL); job; job = block_job_next(job)) { | |
4130 | BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1); | |
4131 | AioContext *aio_context = blk_get_aio_context(job->blk); | |
4132 | ||
4133 | aio_context_acquire(aio_context); | |
4134 | elem->value = block_job_query(job); | |
4135 | aio_context_release(aio_context); | |
4136 | ||
4137 | *p_next = elem; | |
4138 | p_next = &elem->next; | |
4139 | } | |
4140 | ||
4141 | return head; | |
4142 | } | |
4143 | ||
4144 | QemuOptsList qemu_common_drive_opts = { | |
4145 | .name = "drive", | |
4146 | .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head), | |
4147 | .desc = { | |
4148 | { | |
4149 | .name = "snapshot", | |
4150 | .type = QEMU_OPT_BOOL, | |
4151 | .help = "enable/disable snapshot mode", | |
4152 | },{ | |
4153 | .name = "discard", | |
4154 | .type = QEMU_OPT_STRING, | |
4155 | .help = "discard operation (ignore/off, unmap/on)", | |
4156 | },{ | |
4157 | .name = "aio", | |
4158 | .type = QEMU_OPT_STRING, | |
4159 | .help = "host AIO implementation (threads, native)", | |
4160 | },{ | |
4161 | .name = BDRV_OPT_CACHE_WB, | |
4162 | .type = QEMU_OPT_BOOL, | |
4163 | .help = "Enable writeback mode", | |
4164 | },{ | |
4165 | .name = "format", | |
4166 | .type = QEMU_OPT_STRING, | |
4167 | .help = "disk format (raw, qcow2, ...)", | |
4168 | },{ | |
4169 | .name = "rerror", | |
4170 | .type = QEMU_OPT_STRING, | |
4171 | .help = "read error action", | |
4172 | },{ | |
4173 | .name = "werror", | |
4174 | .type = QEMU_OPT_STRING, | |
4175 | .help = "write error action", | |
4176 | },{ | |
4177 | .name = "read-only", | |
4178 | .type = QEMU_OPT_BOOL, | |
4179 | .help = "open drive file as read-only", | |
4180 | },{ | |
4181 | .name = "throttling.iops-total", | |
4182 | .type = QEMU_OPT_NUMBER, | |
4183 | .help = "limit total I/O operations per second", | |
4184 | },{ | |
4185 | .name = "throttling.iops-read", | |
4186 | .type = QEMU_OPT_NUMBER, | |
4187 | .help = "limit read operations per second", | |
4188 | },{ | |
4189 | .name = "throttling.iops-write", | |
4190 | .type = QEMU_OPT_NUMBER, | |
4191 | .help = "limit write operations per second", | |
4192 | },{ | |
4193 | .name = "throttling.bps-total", | |
4194 | .type = QEMU_OPT_NUMBER, | |
4195 | .help = "limit total bytes per second", | |
4196 | },{ | |
4197 | .name = "throttling.bps-read", | |
4198 | .type = QEMU_OPT_NUMBER, | |
4199 | .help = "limit read bytes per second", | |
4200 | },{ | |
4201 | .name = "throttling.bps-write", | |
4202 | .type = QEMU_OPT_NUMBER, | |
4203 | .help = "limit write bytes per second", | |
4204 | },{ | |
4205 | .name = "throttling.iops-total-max", | |
4206 | .type = QEMU_OPT_NUMBER, | |
4207 | .help = "I/O operations burst", | |
4208 | },{ | |
4209 | .name = "throttling.iops-read-max", | |
4210 | .type = QEMU_OPT_NUMBER, | |
4211 | .help = "I/O operations read burst", | |
4212 | },{ | |
4213 | .name = "throttling.iops-write-max", | |
4214 | .type = QEMU_OPT_NUMBER, | |
4215 | .help = "I/O operations write burst", | |
4216 | },{ | |
4217 | .name = "throttling.bps-total-max", | |
4218 | .type = QEMU_OPT_NUMBER, | |
4219 | .help = "total bytes burst", | |
4220 | },{ | |
4221 | .name = "throttling.bps-read-max", | |
4222 | .type = QEMU_OPT_NUMBER, | |
4223 | .help = "total bytes read burst", | |
4224 | },{ | |
4225 | .name = "throttling.bps-write-max", | |
4226 | .type = QEMU_OPT_NUMBER, | |
4227 | .help = "total bytes write burst", | |
4228 | },{ | |
4229 | .name = "throttling.iops-total-max-length", | |
4230 | .type = QEMU_OPT_NUMBER, | |
4231 | .help = "length of the iops-total-max burst period, in seconds", | |
4232 | },{ | |
4233 | .name = "throttling.iops-read-max-length", | |
4234 | .type = QEMU_OPT_NUMBER, | |
4235 | .help = "length of the iops-read-max burst period, in seconds", | |
4236 | },{ | |
4237 | .name = "throttling.iops-write-max-length", | |
4238 | .type = QEMU_OPT_NUMBER, | |
4239 | .help = "length of the iops-write-max burst period, in seconds", | |
4240 | },{ | |
4241 | .name = "throttling.bps-total-max-length", | |
4242 | .type = QEMU_OPT_NUMBER, | |
4243 | .help = "length of the bps-total-max burst period, in seconds", | |
4244 | },{ | |
4245 | .name = "throttling.bps-read-max-length", | |
4246 | .type = QEMU_OPT_NUMBER, | |
4247 | .help = "length of the bps-read-max burst period, in seconds", | |
4248 | },{ | |
4249 | .name = "throttling.bps-write-max-length", | |
4250 | .type = QEMU_OPT_NUMBER, | |
4251 | .help = "length of the bps-write-max burst period, in seconds", | |
4252 | },{ | |
4253 | .name = "throttling.iops-size", | |
4254 | .type = QEMU_OPT_NUMBER, | |
4255 | .help = "when limiting by iops max size of an I/O in bytes", | |
4256 | },{ | |
4257 | .name = "throttling.group", | |
4258 | .type = QEMU_OPT_STRING, | |
4259 | .help = "name of the block throttling group", | |
4260 | },{ | |
4261 | .name = "copy-on-read", | |
4262 | .type = QEMU_OPT_BOOL, | |
4263 | .help = "copy read data from backing file into image file", | |
4264 | },{ | |
4265 | .name = "detect-zeroes", | |
4266 | .type = QEMU_OPT_STRING, | |
4267 | .help = "try to optimize zero writes (off, on, unmap)", | |
4268 | },{ | |
4269 | .name = "stats-account-invalid", | |
4270 | .type = QEMU_OPT_BOOL, | |
4271 | .help = "whether to account for invalid I/O operations " | |
4272 | "in the statistics", | |
4273 | },{ | |
4274 | .name = "stats-account-failed", | |
4275 | .type = QEMU_OPT_BOOL, | |
4276 | .help = "whether to account for failed I/O operations " | |
4277 | "in the statistics", | |
4278 | }, | |
4279 | { /* end of list */ } | |
4280 | }, | |
4281 | }; | |
4282 | ||
4283 | static QemuOptsList qemu_root_bds_opts = { | |
4284 | .name = "root-bds", | |
4285 | .head = QTAILQ_HEAD_INITIALIZER(qemu_root_bds_opts.head), | |
4286 | .desc = { | |
4287 | { | |
4288 | .name = "discard", | |
4289 | .type = QEMU_OPT_STRING, | |
4290 | .help = "discard operation (ignore/off, unmap/on)", | |
4291 | },{ | |
4292 | .name = "aio", | |
4293 | .type = QEMU_OPT_STRING, | |
4294 | .help = "host AIO implementation (threads, native)", | |
4295 | },{ | |
4296 | .name = "read-only", | |
4297 | .type = QEMU_OPT_BOOL, | |
4298 | .help = "open drive file as read-only", | |
4299 | },{ | |
4300 | .name = "copy-on-read", | |
4301 | .type = QEMU_OPT_BOOL, | |
4302 | .help = "copy read data from backing file into image file", | |
4303 | },{ | |
4304 | .name = "detect-zeroes", | |
4305 | .type = QEMU_OPT_STRING, | |
4306 | .help = "try to optimize zero writes (off, on, unmap)", | |
4307 | }, | |
4308 | { /* end of list */ } | |
4309 | }, | |
4310 | }; | |
4311 | ||
4312 | QemuOptsList qemu_drive_opts = { | |
4313 | .name = "drive", | |
4314 | .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head), | |
4315 | .desc = { | |
4316 | /* | |
4317 | * no elements => accept any params | |
4318 | * validation will happen later | |
4319 | */ | |
4320 | { /* end of list */ } | |
4321 | }, | |
4322 | }; |