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Commit | Line | Data |
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26f54e9a MA |
1 | /* |
2 | * QEMU Block backends | |
3 | * | |
4 | * Copyright (C) 2014 Red Hat, Inc. | |
5 | * | |
6 | * Authors: | |
7 | * Markus Armbruster <armbru@redhat.com>, | |
8 | * | |
9 | * This work is licensed under the terms of the GNU LGPL, version 2.1 | |
10 | * or later. See the COPYING.LIB file in the top-level directory. | |
11 | */ | |
12 | ||
13 | #include "sysemu/block-backend.h" | |
14 | #include "block/block_int.h" | |
18e46a03 | 15 | #include "sysemu/blockdev.h" |
a7f53e26 MA |
16 | #include "qapi-event.h" |
17 | ||
18 | /* Number of coroutines to reserve per attached device model */ | |
19 | #define COROUTINE_POOL_RESERVATION 64 | |
26f54e9a MA |
20 | |
21 | struct BlockBackend { | |
22 | char *name; | |
23 | int refcnt; | |
7e7d56d9 | 24 | BlockDriverState *bs; |
26f8b3a8 | 25 | DriveInfo *legacy_dinfo; /* null unless created by drive_new() */ |
26f54e9a | 26 | QTAILQ_ENTRY(BlockBackend) link; /* for blk_backends */ |
a7f53e26 MA |
27 | |
28 | void *dev; /* attached device model, if any */ | |
29 | /* TODO change to DeviceState when all users are qdevified */ | |
30 | const BlockDevOps *dev_ops; | |
31 | void *dev_opaque; | |
26f54e9a MA |
32 | }; |
33 | ||
8fb3c76c MA |
34 | static void drive_info_del(DriveInfo *dinfo); |
35 | ||
7e7d56d9 | 36 | /* All the BlockBackends (except for hidden ones) */ |
26f54e9a MA |
37 | static QTAILQ_HEAD(, BlockBackend) blk_backends = |
38 | QTAILQ_HEAD_INITIALIZER(blk_backends); | |
39 | ||
40 | /* | |
41 | * Create a new BlockBackend with @name, with a reference count of one. | |
42 | * @name must not be null or empty. | |
43 | * Fail if a BlockBackend with this name already exists. | |
44 | * Store an error through @errp on failure, unless it's null. | |
45 | * Return the new BlockBackend on success, null on failure. | |
46 | */ | |
47 | BlockBackend *blk_new(const char *name, Error **errp) | |
48 | { | |
49 | BlockBackend *blk; | |
50 | ||
51 | assert(name && name[0]); | |
7f06d47e MA |
52 | if (!id_wellformed(name)) { |
53 | error_setg(errp, "Invalid device name"); | |
54 | return NULL; | |
55 | } | |
26f54e9a MA |
56 | if (blk_by_name(name)) { |
57 | error_setg(errp, "Device with id '%s' already exists", name); | |
58 | return NULL; | |
59 | } | |
7f06d47e MA |
60 | if (bdrv_find_node(name)) { |
61 | error_setg(errp, | |
62 | "Device name '%s' conflicts with an existing node name", | |
63 | name); | |
64 | return NULL; | |
65 | } | |
26f54e9a MA |
66 | |
67 | blk = g_new0(BlockBackend, 1); | |
68 | blk->name = g_strdup(name); | |
69 | blk->refcnt = 1; | |
70 | QTAILQ_INSERT_TAIL(&blk_backends, blk, link); | |
71 | return blk; | |
72 | } | |
73 | ||
7e7d56d9 MA |
74 | /* |
75 | * Create a new BlockBackend with a new BlockDriverState attached. | |
7e7d56d9 MA |
76 | * Otherwise just like blk_new(), which see. |
77 | */ | |
78 | BlockBackend *blk_new_with_bs(const char *name, Error **errp) | |
79 | { | |
80 | BlockBackend *blk; | |
81 | BlockDriverState *bs; | |
82 | ||
83 | blk = blk_new(name, errp); | |
84 | if (!blk) { | |
85 | return NULL; | |
86 | } | |
87 | ||
7f06d47e | 88 | bs = bdrv_new_root(); |
7e7d56d9 MA |
89 | blk->bs = bs; |
90 | bs->blk = blk; | |
91 | return blk; | |
92 | } | |
93 | ||
26f54e9a MA |
94 | static void blk_delete(BlockBackend *blk) |
95 | { | |
96 | assert(!blk->refcnt); | |
a7f53e26 | 97 | assert(!blk->dev); |
7e7d56d9 | 98 | if (blk->bs) { |
9ba10c95 | 99 | assert(blk->bs->blk == blk); |
7e7d56d9 | 100 | blk->bs->blk = NULL; |
9ba10c95 | 101 | bdrv_unref(blk->bs); |
7e7d56d9 MA |
102 | blk->bs = NULL; |
103 | } | |
104 | /* Avoid double-remove after blk_hide_on_behalf_of_do_drive_del() */ | |
105 | if (blk->name[0]) { | |
106 | QTAILQ_REMOVE(&blk_backends, blk, link); | |
107 | } | |
26f54e9a | 108 | g_free(blk->name); |
18e46a03 | 109 | drive_info_del(blk->legacy_dinfo); |
26f54e9a MA |
110 | g_free(blk); |
111 | } | |
112 | ||
8fb3c76c MA |
113 | static void drive_info_del(DriveInfo *dinfo) |
114 | { | |
115 | if (!dinfo) { | |
116 | return; | |
117 | } | |
118 | qemu_opts_del(dinfo->opts); | |
8fb3c76c MA |
119 | g_free(dinfo->serial); |
120 | g_free(dinfo); | |
121 | } | |
122 | ||
26f54e9a MA |
123 | /* |
124 | * Increment @blk's reference count. | |
125 | * @blk must not be null. | |
126 | */ | |
127 | void blk_ref(BlockBackend *blk) | |
128 | { | |
129 | blk->refcnt++; | |
130 | } | |
131 | ||
132 | /* | |
133 | * Decrement @blk's reference count. | |
134 | * If this drops it to zero, destroy @blk. | |
135 | * For convenience, do nothing if @blk is null. | |
136 | */ | |
137 | void blk_unref(BlockBackend *blk) | |
138 | { | |
139 | if (blk) { | |
140 | assert(blk->refcnt > 0); | |
141 | if (!--blk->refcnt) { | |
142 | blk_delete(blk); | |
143 | } | |
144 | } | |
145 | } | |
146 | ||
147 | /* | |
148 | * Return the BlockBackend after @blk. | |
149 | * If @blk is null, return the first one. | |
150 | * Else, return @blk's next sibling, which may be null. | |
151 | * | |
152 | * To iterate over all BlockBackends, do | |
153 | * for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { | |
154 | * ... | |
155 | * } | |
156 | */ | |
157 | BlockBackend *blk_next(BlockBackend *blk) | |
158 | { | |
159 | return blk ? QTAILQ_NEXT(blk, link) : QTAILQ_FIRST(&blk_backends); | |
160 | } | |
161 | ||
162 | /* | |
7e7d56d9 MA |
163 | * Return @blk's name, a non-null string. |
164 | * Wart: the name is empty iff @blk has been hidden with | |
165 | * blk_hide_on_behalf_of_do_drive_del(). | |
26f54e9a MA |
166 | */ |
167 | const char *blk_name(BlockBackend *blk) | |
168 | { | |
169 | return blk->name; | |
170 | } | |
171 | ||
172 | /* | |
173 | * Return the BlockBackend with name @name if it exists, else null. | |
174 | * @name must not be null. | |
175 | */ | |
176 | BlockBackend *blk_by_name(const char *name) | |
177 | { | |
178 | BlockBackend *blk; | |
179 | ||
180 | assert(name); | |
181 | QTAILQ_FOREACH(blk, &blk_backends, link) { | |
182 | if (!strcmp(name, blk->name)) { | |
183 | return blk; | |
184 | } | |
185 | } | |
186 | return NULL; | |
187 | } | |
7e7d56d9 MA |
188 | |
189 | /* | |
190 | * Return the BlockDriverState attached to @blk if any, else null. | |
191 | */ | |
192 | BlockDriverState *blk_bs(BlockBackend *blk) | |
193 | { | |
194 | return blk->bs; | |
195 | } | |
196 | ||
18e46a03 MA |
197 | /* |
198 | * Return @blk's DriveInfo if any, else null. | |
199 | */ | |
200 | DriveInfo *blk_legacy_dinfo(BlockBackend *blk) | |
201 | { | |
202 | return blk->legacy_dinfo; | |
203 | } | |
204 | ||
205 | /* | |
206 | * Set @blk's DriveInfo to @dinfo, and return it. | |
207 | * @blk must not have a DriveInfo set already. | |
208 | * No other BlockBackend may have the same DriveInfo set. | |
209 | */ | |
210 | DriveInfo *blk_set_legacy_dinfo(BlockBackend *blk, DriveInfo *dinfo) | |
211 | { | |
212 | assert(!blk->legacy_dinfo); | |
213 | return blk->legacy_dinfo = dinfo; | |
214 | } | |
215 | ||
216 | /* | |
217 | * Return the BlockBackend with DriveInfo @dinfo. | |
218 | * It must exist. | |
219 | */ | |
220 | BlockBackend *blk_by_legacy_dinfo(DriveInfo *dinfo) | |
221 | { | |
222 | BlockBackend *blk; | |
223 | ||
224 | QTAILQ_FOREACH(blk, &blk_backends, link) { | |
225 | if (blk->legacy_dinfo == dinfo) { | |
226 | return blk; | |
227 | } | |
228 | } | |
229 | abort(); | |
230 | } | |
231 | ||
7e7d56d9 MA |
232 | /* |
233 | * Hide @blk. | |
234 | * @blk must not have been hidden already. | |
235 | * Make attached BlockDriverState, if any, anonymous. | |
236 | * Once hidden, @blk is invisible to all functions that don't receive | |
237 | * it as argument. For example, blk_by_name() won't return it. | |
238 | * Strictly for use by do_drive_del(). | |
239 | * TODO get rid of it! | |
240 | */ | |
241 | void blk_hide_on_behalf_of_do_drive_del(BlockBackend *blk) | |
242 | { | |
243 | QTAILQ_REMOVE(&blk_backends, blk, link); | |
244 | blk->name[0] = 0; | |
245 | if (blk->bs) { | |
246 | bdrv_make_anon(blk->bs); | |
247 | } | |
248 | } | |
4be74634 | 249 | |
a7f53e26 MA |
250 | /* |
251 | * Attach device model @dev to @blk. | |
252 | * Return 0 on success, -EBUSY when a device model is attached already. | |
253 | */ | |
4be74634 | 254 | int blk_attach_dev(BlockBackend *blk, void *dev) |
a7f53e26 | 255 | /* TODO change to DeviceState *dev when all users are qdevified */ |
4be74634 | 256 | { |
a7f53e26 MA |
257 | if (blk->dev) { |
258 | return -EBUSY; | |
259 | } | |
260 | blk->dev = dev; | |
261 | bdrv_iostatus_reset(blk->bs); | |
262 | ||
263 | /* We're expecting I/O from the device so bump up coroutine pool size */ | |
264 | qemu_coroutine_adjust_pool_size(COROUTINE_POOL_RESERVATION); | |
265 | return 0; | |
4be74634 MA |
266 | } |
267 | ||
a7f53e26 MA |
268 | /* |
269 | * Attach device model @dev to @blk. | |
270 | * @blk must not have a device model attached already. | |
271 | * TODO qdevified devices don't use this, remove when devices are qdevified | |
272 | */ | |
4be74634 MA |
273 | void blk_attach_dev_nofail(BlockBackend *blk, void *dev) |
274 | { | |
a7f53e26 MA |
275 | if (blk_attach_dev(blk, dev) < 0) { |
276 | abort(); | |
277 | } | |
4be74634 MA |
278 | } |
279 | ||
a7f53e26 MA |
280 | /* |
281 | * Detach device model @dev from @blk. | |
282 | * @dev must be currently attached to @blk. | |
283 | */ | |
4be74634 | 284 | void blk_detach_dev(BlockBackend *blk, void *dev) |
a7f53e26 | 285 | /* TODO change to DeviceState *dev when all users are qdevified */ |
4be74634 | 286 | { |
a7f53e26 MA |
287 | assert(blk->dev == dev); |
288 | blk->dev = NULL; | |
289 | blk->dev_ops = NULL; | |
290 | blk->dev_opaque = NULL; | |
291 | bdrv_set_guest_block_size(blk->bs, 512); | |
292 | qemu_coroutine_adjust_pool_size(-COROUTINE_POOL_RESERVATION); | |
4be74634 MA |
293 | } |
294 | ||
a7f53e26 MA |
295 | /* |
296 | * Return the device model attached to @blk if any, else null. | |
297 | */ | |
4be74634 | 298 | void *blk_get_attached_dev(BlockBackend *blk) |
a7f53e26 MA |
299 | /* TODO change to return DeviceState * when all users are qdevified */ |
300 | { | |
301 | return blk->dev; | |
302 | } | |
303 | ||
304 | /* | |
305 | * Set @blk's device model callbacks to @ops. | |
306 | * @opaque is the opaque argument to pass to the callbacks. | |
307 | * This is for use by device models. | |
308 | */ | |
309 | void blk_set_dev_ops(BlockBackend *blk, const BlockDevOps *ops, | |
310 | void *opaque) | |
311 | { | |
312 | blk->dev_ops = ops; | |
313 | blk->dev_opaque = opaque; | |
314 | } | |
315 | ||
316 | /* | |
317 | * Notify @blk's attached device model of media change. | |
318 | * If @load is true, notify of media load. | |
319 | * Else, notify of media eject. | |
320 | * Also send DEVICE_TRAY_MOVED events as appropriate. | |
321 | */ | |
322 | void blk_dev_change_media_cb(BlockBackend *blk, bool load) | |
323 | { | |
324 | if (blk->dev_ops && blk->dev_ops->change_media_cb) { | |
325 | bool tray_was_closed = !blk_dev_is_tray_open(blk); | |
326 | ||
327 | blk->dev_ops->change_media_cb(blk->dev_opaque, load); | |
328 | if (tray_was_closed) { | |
329 | /* tray open */ | |
330 | qapi_event_send_device_tray_moved(blk_name(blk), | |
331 | true, &error_abort); | |
332 | } | |
333 | if (load) { | |
334 | /* tray close */ | |
335 | qapi_event_send_device_tray_moved(blk_name(blk), | |
336 | false, &error_abort); | |
337 | } | |
338 | } | |
339 | } | |
340 | ||
341 | /* | |
342 | * Does @blk's attached device model have removable media? | |
343 | * %true if no device model is attached. | |
344 | */ | |
345 | bool blk_dev_has_removable_media(BlockBackend *blk) | |
346 | { | |
347 | return !blk->dev || (blk->dev_ops && blk->dev_ops->change_media_cb); | |
348 | } | |
349 | ||
350 | /* | |
351 | * Notify @blk's attached device model of a media eject request. | |
352 | * If @force is true, the medium is about to be yanked out forcefully. | |
353 | */ | |
354 | void blk_dev_eject_request(BlockBackend *blk, bool force) | |
4be74634 | 355 | { |
a7f53e26 MA |
356 | if (blk->dev_ops && blk->dev_ops->eject_request_cb) { |
357 | blk->dev_ops->eject_request_cb(blk->dev_opaque, force); | |
358 | } | |
4be74634 MA |
359 | } |
360 | ||
a7f53e26 MA |
361 | /* |
362 | * Does @blk's attached device model have a tray, and is it open? | |
363 | */ | |
364 | bool blk_dev_is_tray_open(BlockBackend *blk) | |
4be74634 | 365 | { |
a7f53e26 MA |
366 | if (blk->dev_ops && blk->dev_ops->is_tray_open) { |
367 | return blk->dev_ops->is_tray_open(blk->dev_opaque); | |
368 | } | |
369 | return false; | |
370 | } | |
371 | ||
372 | /* | |
373 | * Does @blk's attached device model have the medium locked? | |
374 | * %false if the device model has no such lock. | |
375 | */ | |
376 | bool blk_dev_is_medium_locked(BlockBackend *blk) | |
377 | { | |
378 | if (blk->dev_ops && blk->dev_ops->is_medium_locked) { | |
379 | return blk->dev_ops->is_medium_locked(blk->dev_opaque); | |
380 | } | |
381 | return false; | |
382 | } | |
383 | ||
384 | /* | |
385 | * Notify @blk's attached device model of a backend size change. | |
386 | */ | |
387 | void blk_dev_resize_cb(BlockBackend *blk) | |
388 | { | |
389 | if (blk->dev_ops && blk->dev_ops->resize_cb) { | |
390 | blk->dev_ops->resize_cb(blk->dev_opaque); | |
391 | } | |
392 | } | |
393 | ||
394 | void blk_iostatus_enable(BlockBackend *blk) | |
395 | { | |
396 | bdrv_iostatus_enable(blk->bs); | |
4be74634 MA |
397 | } |
398 | ||
399 | int blk_read(BlockBackend *blk, int64_t sector_num, uint8_t *buf, | |
400 | int nb_sectors) | |
401 | { | |
402 | return bdrv_read(blk->bs, sector_num, buf, nb_sectors); | |
403 | } | |
404 | ||
405 | int blk_read_unthrottled(BlockBackend *blk, int64_t sector_num, uint8_t *buf, | |
406 | int nb_sectors) | |
407 | { | |
408 | return bdrv_read_unthrottled(blk->bs, sector_num, buf, nb_sectors); | |
409 | } | |
410 | ||
411 | int blk_write(BlockBackend *blk, int64_t sector_num, const uint8_t *buf, | |
412 | int nb_sectors) | |
413 | { | |
414 | return bdrv_write(blk->bs, sector_num, buf, nb_sectors); | |
415 | } | |
416 | ||
417 | BlockAIOCB *blk_aio_write_zeroes(BlockBackend *blk, int64_t sector_num, | |
418 | int nb_sectors, BdrvRequestFlags flags, | |
419 | BlockCompletionFunc *cb, void *opaque) | |
420 | { | |
421 | return bdrv_aio_write_zeroes(blk->bs, sector_num, nb_sectors, flags, | |
422 | cb, opaque); | |
423 | } | |
424 | ||
425 | int blk_pread(BlockBackend *blk, int64_t offset, void *buf, int count) | |
426 | { | |
427 | return bdrv_pread(blk->bs, offset, buf, count); | |
428 | } | |
429 | ||
430 | int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int count) | |
431 | { | |
432 | return bdrv_pwrite(blk->bs, offset, buf, count); | |
433 | } | |
434 | ||
435 | int64_t blk_getlength(BlockBackend *blk) | |
436 | { | |
437 | return bdrv_getlength(blk->bs); | |
438 | } | |
439 | ||
440 | void blk_get_geometry(BlockBackend *blk, uint64_t *nb_sectors_ptr) | |
441 | { | |
442 | bdrv_get_geometry(blk->bs, nb_sectors_ptr); | |
443 | } | |
444 | ||
445 | BlockAIOCB *blk_aio_readv(BlockBackend *blk, int64_t sector_num, | |
446 | QEMUIOVector *iov, int nb_sectors, | |
447 | BlockCompletionFunc *cb, void *opaque) | |
448 | { | |
449 | return bdrv_aio_readv(blk->bs, sector_num, iov, nb_sectors, cb, opaque); | |
450 | } | |
451 | ||
452 | BlockAIOCB *blk_aio_writev(BlockBackend *blk, int64_t sector_num, | |
453 | QEMUIOVector *iov, int nb_sectors, | |
454 | BlockCompletionFunc *cb, void *opaque) | |
455 | { | |
456 | return bdrv_aio_writev(blk->bs, sector_num, iov, nb_sectors, cb, opaque); | |
457 | } | |
458 | ||
459 | BlockAIOCB *blk_aio_flush(BlockBackend *blk, | |
460 | BlockCompletionFunc *cb, void *opaque) | |
461 | { | |
462 | return bdrv_aio_flush(blk->bs, cb, opaque); | |
463 | } | |
464 | ||
465 | BlockAIOCB *blk_aio_discard(BlockBackend *blk, | |
466 | int64_t sector_num, int nb_sectors, | |
467 | BlockCompletionFunc *cb, void *opaque) | |
468 | { | |
469 | return bdrv_aio_discard(blk->bs, sector_num, nb_sectors, cb, opaque); | |
470 | } | |
471 | ||
472 | void blk_aio_cancel(BlockAIOCB *acb) | |
473 | { | |
474 | bdrv_aio_cancel(acb); | |
475 | } | |
476 | ||
477 | void blk_aio_cancel_async(BlockAIOCB *acb) | |
478 | { | |
479 | bdrv_aio_cancel_async(acb); | |
480 | } | |
481 | ||
482 | int blk_aio_multiwrite(BlockBackend *blk, BlockRequest *reqs, int num_reqs) | |
483 | { | |
484 | return bdrv_aio_multiwrite(blk->bs, reqs, num_reqs); | |
485 | } | |
486 | ||
487 | int blk_ioctl(BlockBackend *blk, unsigned long int req, void *buf) | |
488 | { | |
489 | return bdrv_ioctl(blk->bs, req, buf); | |
490 | } | |
491 | ||
492 | BlockAIOCB *blk_aio_ioctl(BlockBackend *blk, unsigned long int req, void *buf, | |
493 | BlockCompletionFunc *cb, void *opaque) | |
494 | { | |
495 | return bdrv_aio_ioctl(blk->bs, req, buf, cb, opaque); | |
496 | } | |
497 | ||
498 | int blk_flush(BlockBackend *blk) | |
499 | { | |
500 | return bdrv_flush(blk->bs); | |
501 | } | |
502 | ||
503 | int blk_flush_all(void) | |
504 | { | |
505 | return bdrv_flush_all(); | |
506 | } | |
507 | ||
508 | void blk_drain_all(void) | |
509 | { | |
510 | bdrv_drain_all(); | |
511 | } | |
512 | ||
513 | BlockdevOnError blk_get_on_error(BlockBackend *blk, bool is_read) | |
514 | { | |
515 | return bdrv_get_on_error(blk->bs, is_read); | |
516 | } | |
517 | ||
518 | BlockErrorAction blk_get_error_action(BlockBackend *blk, bool is_read, | |
519 | int error) | |
520 | { | |
521 | return bdrv_get_error_action(blk->bs, is_read, error); | |
522 | } | |
523 | ||
524 | void blk_error_action(BlockBackend *blk, BlockErrorAction action, | |
525 | bool is_read, int error) | |
526 | { | |
527 | bdrv_error_action(blk->bs, action, is_read, error); | |
528 | } | |
529 | ||
530 | int blk_is_read_only(BlockBackend *blk) | |
531 | { | |
532 | return bdrv_is_read_only(blk->bs); | |
533 | } | |
534 | ||
535 | int blk_is_sg(BlockBackend *blk) | |
536 | { | |
537 | return bdrv_is_sg(blk->bs); | |
538 | } | |
539 | ||
540 | int blk_enable_write_cache(BlockBackend *blk) | |
541 | { | |
542 | return bdrv_enable_write_cache(blk->bs); | |
543 | } | |
544 | ||
545 | void blk_set_enable_write_cache(BlockBackend *blk, bool wce) | |
546 | { | |
547 | bdrv_set_enable_write_cache(blk->bs, wce); | |
548 | } | |
549 | ||
550 | int blk_is_inserted(BlockBackend *blk) | |
551 | { | |
552 | return bdrv_is_inserted(blk->bs); | |
553 | } | |
554 | ||
555 | void blk_lock_medium(BlockBackend *blk, bool locked) | |
556 | { | |
557 | bdrv_lock_medium(blk->bs, locked); | |
558 | } | |
559 | ||
560 | void blk_eject(BlockBackend *blk, bool eject_flag) | |
561 | { | |
562 | bdrv_eject(blk->bs, eject_flag); | |
563 | } | |
564 | ||
565 | int blk_get_flags(BlockBackend *blk) | |
566 | { | |
567 | return bdrv_get_flags(blk->bs); | |
568 | } | |
569 | ||
570 | void blk_set_guest_block_size(BlockBackend *blk, int align) | |
571 | { | |
572 | bdrv_set_guest_block_size(blk->bs, align); | |
573 | } | |
574 | ||
575 | void *blk_blockalign(BlockBackend *blk, size_t size) | |
576 | { | |
577 | return qemu_blockalign(blk ? blk->bs : NULL, size); | |
578 | } | |
579 | ||
580 | bool blk_op_is_blocked(BlockBackend *blk, BlockOpType op, Error **errp) | |
581 | { | |
582 | return bdrv_op_is_blocked(blk->bs, op, errp); | |
583 | } | |
584 | ||
585 | void blk_op_unblock(BlockBackend *blk, BlockOpType op, Error *reason) | |
586 | { | |
587 | bdrv_op_unblock(blk->bs, op, reason); | |
588 | } | |
589 | ||
590 | void blk_op_block_all(BlockBackend *blk, Error *reason) | |
591 | { | |
592 | bdrv_op_block_all(blk->bs, reason); | |
593 | } | |
594 | ||
595 | void blk_op_unblock_all(BlockBackend *blk, Error *reason) | |
596 | { | |
597 | bdrv_op_unblock_all(blk->bs, reason); | |
598 | } | |
599 | ||
600 | AioContext *blk_get_aio_context(BlockBackend *blk) | |
601 | { | |
602 | return bdrv_get_aio_context(blk->bs); | |
603 | } | |
604 | ||
605 | void blk_set_aio_context(BlockBackend *blk, AioContext *new_context) | |
606 | { | |
607 | bdrv_set_aio_context(blk->bs, new_context); | |
608 | } | |
609 | ||
610 | void blk_io_plug(BlockBackend *blk) | |
611 | { | |
612 | bdrv_io_plug(blk->bs); | |
613 | } | |
614 | ||
615 | void blk_io_unplug(BlockBackend *blk) | |
616 | { | |
617 | bdrv_io_unplug(blk->bs); | |
618 | } | |
619 | ||
620 | BlockAcctStats *blk_get_stats(BlockBackend *blk) | |
621 | { | |
622 | return bdrv_get_stats(blk->bs); | |
623 | } | |
624 | ||
625 | void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk, | |
626 | BlockCompletionFunc *cb, void *opaque) | |
627 | { | |
628 | return qemu_aio_get(aiocb_info, blk_bs(blk), cb, opaque); | |
629 | } |