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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 | ||
e7f7d676 HR |
34 | typedef struct BlockBackendAIOCB { |
35 | BlockAIOCB common; | |
36 | QEMUBH *bh; | |
37 | int ret; | |
38 | } BlockBackendAIOCB; | |
39 | ||
40 | static const AIOCBInfo block_backend_aiocb_info = { | |
41 | .aiocb_size = sizeof(BlockBackendAIOCB), | |
42 | }; | |
43 | ||
8fb3c76c MA |
44 | static void drive_info_del(DriveInfo *dinfo); |
45 | ||
7e7d56d9 | 46 | /* All the BlockBackends (except for hidden ones) */ |
26f54e9a MA |
47 | static QTAILQ_HEAD(, BlockBackend) blk_backends = |
48 | QTAILQ_HEAD_INITIALIZER(blk_backends); | |
49 | ||
50 | /* | |
51 | * Create a new BlockBackend with @name, with a reference count of one. | |
52 | * @name must not be null or empty. | |
53 | * Fail if a BlockBackend with this name already exists. | |
54 | * Store an error through @errp on failure, unless it's null. | |
55 | * Return the new BlockBackend on success, null on failure. | |
56 | */ | |
57 | BlockBackend *blk_new(const char *name, Error **errp) | |
58 | { | |
59 | BlockBackend *blk; | |
60 | ||
61 | assert(name && name[0]); | |
7f06d47e MA |
62 | if (!id_wellformed(name)) { |
63 | error_setg(errp, "Invalid device name"); | |
64 | return NULL; | |
65 | } | |
26f54e9a MA |
66 | if (blk_by_name(name)) { |
67 | error_setg(errp, "Device with id '%s' already exists", name); | |
68 | return NULL; | |
69 | } | |
7f06d47e MA |
70 | if (bdrv_find_node(name)) { |
71 | error_setg(errp, | |
72 | "Device name '%s' conflicts with an existing node name", | |
73 | name); | |
74 | return NULL; | |
75 | } | |
26f54e9a MA |
76 | |
77 | blk = g_new0(BlockBackend, 1); | |
78 | blk->name = g_strdup(name); | |
79 | blk->refcnt = 1; | |
80 | QTAILQ_INSERT_TAIL(&blk_backends, blk, link); | |
81 | return blk; | |
82 | } | |
83 | ||
7e7d56d9 MA |
84 | /* |
85 | * Create a new BlockBackend with a new BlockDriverState attached. | |
7e7d56d9 MA |
86 | * Otherwise just like blk_new(), which see. |
87 | */ | |
88 | BlockBackend *blk_new_with_bs(const char *name, Error **errp) | |
89 | { | |
90 | BlockBackend *blk; | |
91 | BlockDriverState *bs; | |
92 | ||
93 | blk = blk_new(name, errp); | |
94 | if (!blk) { | |
95 | return NULL; | |
96 | } | |
97 | ||
7f06d47e | 98 | bs = bdrv_new_root(); |
7e7d56d9 MA |
99 | blk->bs = bs; |
100 | bs->blk = blk; | |
101 | return blk; | |
102 | } | |
103 | ||
ca49a4fd HR |
104 | /* |
105 | * Calls blk_new_with_bs() and then calls bdrv_open() on the BlockDriverState. | |
106 | * | |
107 | * Just as with bdrv_open(), after having called this function the reference to | |
108 | * @options belongs to the block layer (even on failure). | |
109 | * | |
110 | * TODO: Remove @filename and @flags; it should be possible to specify a whole | |
111 | * BDS tree just by specifying the @options QDict (or @reference, | |
112 | * alternatively). At the time of adding this function, this is not possible, | |
113 | * though, so callers of this function have to be able to specify @filename and | |
114 | * @flags. | |
115 | */ | |
116 | BlockBackend *blk_new_open(const char *name, const char *filename, | |
117 | const char *reference, QDict *options, int flags, | |
118 | Error **errp) | |
119 | { | |
120 | BlockBackend *blk; | |
121 | int ret; | |
122 | ||
123 | blk = blk_new_with_bs(name, errp); | |
124 | if (!blk) { | |
125 | QDECREF(options); | |
126 | return NULL; | |
127 | } | |
128 | ||
129 | ret = bdrv_open(&blk->bs, filename, reference, options, flags, NULL, errp); | |
130 | if (ret < 0) { | |
131 | blk_unref(blk); | |
132 | return NULL; | |
133 | } | |
134 | ||
135 | return blk; | |
136 | } | |
137 | ||
26f54e9a MA |
138 | static void blk_delete(BlockBackend *blk) |
139 | { | |
140 | assert(!blk->refcnt); | |
a7f53e26 | 141 | assert(!blk->dev); |
7e7d56d9 | 142 | if (blk->bs) { |
9ba10c95 | 143 | assert(blk->bs->blk == blk); |
7e7d56d9 | 144 | blk->bs->blk = NULL; |
9ba10c95 | 145 | bdrv_unref(blk->bs); |
7e7d56d9 MA |
146 | blk->bs = NULL; |
147 | } | |
3e5a50d6 | 148 | /* Avoid double-remove after blk_hide_on_behalf_of_hmp_drive_del() */ |
7e7d56d9 MA |
149 | if (blk->name[0]) { |
150 | QTAILQ_REMOVE(&blk_backends, blk, link); | |
151 | } | |
26f54e9a | 152 | g_free(blk->name); |
18e46a03 | 153 | drive_info_del(blk->legacy_dinfo); |
26f54e9a MA |
154 | g_free(blk); |
155 | } | |
156 | ||
8fb3c76c MA |
157 | static void drive_info_del(DriveInfo *dinfo) |
158 | { | |
159 | if (!dinfo) { | |
160 | return; | |
161 | } | |
162 | qemu_opts_del(dinfo->opts); | |
8fb3c76c MA |
163 | g_free(dinfo->serial); |
164 | g_free(dinfo); | |
165 | } | |
166 | ||
26f54e9a MA |
167 | /* |
168 | * Increment @blk's reference count. | |
169 | * @blk must not be null. | |
170 | */ | |
171 | void blk_ref(BlockBackend *blk) | |
172 | { | |
173 | blk->refcnt++; | |
174 | } | |
175 | ||
176 | /* | |
177 | * Decrement @blk's reference count. | |
178 | * If this drops it to zero, destroy @blk. | |
179 | * For convenience, do nothing if @blk is null. | |
180 | */ | |
181 | void blk_unref(BlockBackend *blk) | |
182 | { | |
183 | if (blk) { | |
184 | assert(blk->refcnt > 0); | |
185 | if (!--blk->refcnt) { | |
186 | blk_delete(blk); | |
187 | } | |
188 | } | |
189 | } | |
190 | ||
191 | /* | |
192 | * Return the BlockBackend after @blk. | |
193 | * If @blk is null, return the first one. | |
194 | * Else, return @blk's next sibling, which may be null. | |
195 | * | |
196 | * To iterate over all BlockBackends, do | |
197 | * for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { | |
198 | * ... | |
199 | * } | |
200 | */ | |
201 | BlockBackend *blk_next(BlockBackend *blk) | |
202 | { | |
203 | return blk ? QTAILQ_NEXT(blk, link) : QTAILQ_FIRST(&blk_backends); | |
204 | } | |
205 | ||
206 | /* | |
7e7d56d9 MA |
207 | * Return @blk's name, a non-null string. |
208 | * Wart: the name is empty iff @blk has been hidden with | |
3e5a50d6 | 209 | * blk_hide_on_behalf_of_hmp_drive_del(). |
26f54e9a MA |
210 | */ |
211 | const char *blk_name(BlockBackend *blk) | |
212 | { | |
213 | return blk->name; | |
214 | } | |
215 | ||
216 | /* | |
217 | * Return the BlockBackend with name @name if it exists, else null. | |
218 | * @name must not be null. | |
219 | */ | |
220 | BlockBackend *blk_by_name(const char *name) | |
221 | { | |
222 | BlockBackend *blk; | |
223 | ||
224 | assert(name); | |
225 | QTAILQ_FOREACH(blk, &blk_backends, link) { | |
226 | if (!strcmp(name, blk->name)) { | |
227 | return blk; | |
228 | } | |
229 | } | |
230 | return NULL; | |
231 | } | |
7e7d56d9 MA |
232 | |
233 | /* | |
234 | * Return the BlockDriverState attached to @blk if any, else null. | |
235 | */ | |
236 | BlockDriverState *blk_bs(BlockBackend *blk) | |
237 | { | |
238 | return blk->bs; | |
239 | } | |
240 | ||
18e46a03 MA |
241 | /* |
242 | * Return @blk's DriveInfo if any, else null. | |
243 | */ | |
244 | DriveInfo *blk_legacy_dinfo(BlockBackend *blk) | |
245 | { | |
246 | return blk->legacy_dinfo; | |
247 | } | |
248 | ||
249 | /* | |
250 | * Set @blk's DriveInfo to @dinfo, and return it. | |
251 | * @blk must not have a DriveInfo set already. | |
252 | * No other BlockBackend may have the same DriveInfo set. | |
253 | */ | |
254 | DriveInfo *blk_set_legacy_dinfo(BlockBackend *blk, DriveInfo *dinfo) | |
255 | { | |
256 | assert(!blk->legacy_dinfo); | |
257 | return blk->legacy_dinfo = dinfo; | |
258 | } | |
259 | ||
260 | /* | |
261 | * Return the BlockBackend with DriveInfo @dinfo. | |
262 | * It must exist. | |
263 | */ | |
264 | BlockBackend *blk_by_legacy_dinfo(DriveInfo *dinfo) | |
265 | { | |
266 | BlockBackend *blk; | |
267 | ||
268 | QTAILQ_FOREACH(blk, &blk_backends, link) { | |
269 | if (blk->legacy_dinfo == dinfo) { | |
270 | return blk; | |
271 | } | |
272 | } | |
273 | abort(); | |
274 | } | |
275 | ||
7e7d56d9 MA |
276 | /* |
277 | * Hide @blk. | |
278 | * @blk must not have been hidden already. | |
279 | * Make attached BlockDriverState, if any, anonymous. | |
280 | * Once hidden, @blk is invisible to all functions that don't receive | |
281 | * it as argument. For example, blk_by_name() won't return it. | |
282 | * Strictly for use by do_drive_del(). | |
283 | * TODO get rid of it! | |
284 | */ | |
3e5a50d6 | 285 | void blk_hide_on_behalf_of_hmp_drive_del(BlockBackend *blk) |
7e7d56d9 MA |
286 | { |
287 | QTAILQ_REMOVE(&blk_backends, blk, link); | |
288 | blk->name[0] = 0; | |
289 | if (blk->bs) { | |
290 | bdrv_make_anon(blk->bs); | |
291 | } | |
292 | } | |
4be74634 | 293 | |
a7f53e26 MA |
294 | /* |
295 | * Attach device model @dev to @blk. | |
296 | * Return 0 on success, -EBUSY when a device model is attached already. | |
297 | */ | |
4be74634 | 298 | int blk_attach_dev(BlockBackend *blk, void *dev) |
a7f53e26 | 299 | /* TODO change to DeviceState *dev when all users are qdevified */ |
4be74634 | 300 | { |
a7f53e26 MA |
301 | if (blk->dev) { |
302 | return -EBUSY; | |
303 | } | |
84ebe375 | 304 | blk_ref(blk); |
a7f53e26 MA |
305 | blk->dev = dev; |
306 | bdrv_iostatus_reset(blk->bs); | |
a7f53e26 | 307 | return 0; |
4be74634 MA |
308 | } |
309 | ||
a7f53e26 MA |
310 | /* |
311 | * Attach device model @dev to @blk. | |
312 | * @blk must not have a device model attached already. | |
313 | * TODO qdevified devices don't use this, remove when devices are qdevified | |
314 | */ | |
4be74634 MA |
315 | void blk_attach_dev_nofail(BlockBackend *blk, void *dev) |
316 | { | |
a7f53e26 MA |
317 | if (blk_attach_dev(blk, dev) < 0) { |
318 | abort(); | |
319 | } | |
4be74634 MA |
320 | } |
321 | ||
a7f53e26 MA |
322 | /* |
323 | * Detach device model @dev from @blk. | |
324 | * @dev must be currently attached to @blk. | |
325 | */ | |
4be74634 | 326 | void blk_detach_dev(BlockBackend *blk, void *dev) |
a7f53e26 | 327 | /* TODO change to DeviceState *dev when all users are qdevified */ |
4be74634 | 328 | { |
a7f53e26 MA |
329 | assert(blk->dev == dev); |
330 | blk->dev = NULL; | |
331 | blk->dev_ops = NULL; | |
332 | blk->dev_opaque = NULL; | |
333 | bdrv_set_guest_block_size(blk->bs, 512); | |
84ebe375 | 334 | blk_unref(blk); |
4be74634 MA |
335 | } |
336 | ||
a7f53e26 MA |
337 | /* |
338 | * Return the device model attached to @blk if any, else null. | |
339 | */ | |
4be74634 | 340 | void *blk_get_attached_dev(BlockBackend *blk) |
a7f53e26 MA |
341 | /* TODO change to return DeviceState * when all users are qdevified */ |
342 | { | |
343 | return blk->dev; | |
344 | } | |
345 | ||
346 | /* | |
347 | * Set @blk's device model callbacks to @ops. | |
348 | * @opaque is the opaque argument to pass to the callbacks. | |
349 | * This is for use by device models. | |
350 | */ | |
351 | void blk_set_dev_ops(BlockBackend *blk, const BlockDevOps *ops, | |
352 | void *opaque) | |
353 | { | |
354 | blk->dev_ops = ops; | |
355 | blk->dev_opaque = opaque; | |
356 | } | |
357 | ||
358 | /* | |
359 | * Notify @blk's attached device model of media change. | |
360 | * If @load is true, notify of media load. | |
361 | * Else, notify of media eject. | |
362 | * Also send DEVICE_TRAY_MOVED events as appropriate. | |
363 | */ | |
364 | void blk_dev_change_media_cb(BlockBackend *blk, bool load) | |
365 | { | |
366 | if (blk->dev_ops && blk->dev_ops->change_media_cb) { | |
367 | bool tray_was_closed = !blk_dev_is_tray_open(blk); | |
368 | ||
369 | blk->dev_ops->change_media_cb(blk->dev_opaque, load); | |
370 | if (tray_was_closed) { | |
371 | /* tray open */ | |
372 | qapi_event_send_device_tray_moved(blk_name(blk), | |
373 | true, &error_abort); | |
374 | } | |
375 | if (load) { | |
376 | /* tray close */ | |
377 | qapi_event_send_device_tray_moved(blk_name(blk), | |
378 | false, &error_abort); | |
379 | } | |
380 | } | |
381 | } | |
382 | ||
383 | /* | |
384 | * Does @blk's attached device model have removable media? | |
385 | * %true if no device model is attached. | |
386 | */ | |
387 | bool blk_dev_has_removable_media(BlockBackend *blk) | |
388 | { | |
389 | return !blk->dev || (blk->dev_ops && blk->dev_ops->change_media_cb); | |
390 | } | |
391 | ||
392 | /* | |
393 | * Notify @blk's attached device model of a media eject request. | |
394 | * If @force is true, the medium is about to be yanked out forcefully. | |
395 | */ | |
396 | void blk_dev_eject_request(BlockBackend *blk, bool force) | |
4be74634 | 397 | { |
a7f53e26 MA |
398 | if (blk->dev_ops && blk->dev_ops->eject_request_cb) { |
399 | blk->dev_ops->eject_request_cb(blk->dev_opaque, force); | |
400 | } | |
4be74634 MA |
401 | } |
402 | ||
a7f53e26 MA |
403 | /* |
404 | * Does @blk's attached device model have a tray, and is it open? | |
405 | */ | |
406 | bool blk_dev_is_tray_open(BlockBackend *blk) | |
4be74634 | 407 | { |
a7f53e26 MA |
408 | if (blk->dev_ops && blk->dev_ops->is_tray_open) { |
409 | return blk->dev_ops->is_tray_open(blk->dev_opaque); | |
410 | } | |
411 | return false; | |
412 | } | |
413 | ||
414 | /* | |
415 | * Does @blk's attached device model have the medium locked? | |
416 | * %false if the device model has no such lock. | |
417 | */ | |
418 | bool blk_dev_is_medium_locked(BlockBackend *blk) | |
419 | { | |
420 | if (blk->dev_ops && blk->dev_ops->is_medium_locked) { | |
421 | return blk->dev_ops->is_medium_locked(blk->dev_opaque); | |
422 | } | |
423 | return false; | |
424 | } | |
425 | ||
426 | /* | |
427 | * Notify @blk's attached device model of a backend size change. | |
428 | */ | |
429 | void blk_dev_resize_cb(BlockBackend *blk) | |
430 | { | |
431 | if (blk->dev_ops && blk->dev_ops->resize_cb) { | |
432 | blk->dev_ops->resize_cb(blk->dev_opaque); | |
433 | } | |
434 | } | |
435 | ||
436 | void blk_iostatus_enable(BlockBackend *blk) | |
437 | { | |
438 | bdrv_iostatus_enable(blk->bs); | |
4be74634 MA |
439 | } |
440 | ||
e7f7d676 HR |
441 | static int blk_check_byte_request(BlockBackend *blk, int64_t offset, |
442 | size_t size) | |
443 | { | |
444 | int64_t len; | |
445 | ||
446 | if (size > INT_MAX) { | |
447 | return -EIO; | |
448 | } | |
449 | ||
450 | if (!blk_is_inserted(blk)) { | |
451 | return -ENOMEDIUM; | |
452 | } | |
453 | ||
454 | len = blk_getlength(blk); | |
455 | if (len < 0) { | |
456 | return len; | |
457 | } | |
458 | ||
459 | if (offset < 0) { | |
460 | return -EIO; | |
461 | } | |
462 | ||
463 | if (offset > len || len - offset < size) { | |
464 | return -EIO; | |
465 | } | |
466 | ||
467 | return 0; | |
468 | } | |
469 | ||
470 | static int blk_check_request(BlockBackend *blk, int64_t sector_num, | |
471 | int nb_sectors) | |
472 | { | |
473 | if (sector_num < 0 || sector_num > INT64_MAX / BDRV_SECTOR_SIZE) { | |
474 | return -EIO; | |
475 | } | |
476 | ||
477 | if (nb_sectors < 0 || nb_sectors > INT_MAX / BDRV_SECTOR_SIZE) { | |
478 | return -EIO; | |
479 | } | |
480 | ||
481 | return blk_check_byte_request(blk, sector_num * BDRV_SECTOR_SIZE, | |
482 | nb_sectors * BDRV_SECTOR_SIZE); | |
483 | } | |
484 | ||
4be74634 MA |
485 | int blk_read(BlockBackend *blk, int64_t sector_num, uint8_t *buf, |
486 | int nb_sectors) | |
487 | { | |
e7f7d676 HR |
488 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
489 | if (ret < 0) { | |
490 | return ret; | |
491 | } | |
492 | ||
4be74634 MA |
493 | return bdrv_read(blk->bs, sector_num, buf, nb_sectors); |
494 | } | |
495 | ||
496 | int blk_read_unthrottled(BlockBackend *blk, int64_t sector_num, uint8_t *buf, | |
497 | int nb_sectors) | |
498 | { | |
e7f7d676 HR |
499 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
500 | if (ret < 0) { | |
501 | return ret; | |
502 | } | |
503 | ||
4be74634 MA |
504 | return bdrv_read_unthrottled(blk->bs, sector_num, buf, nb_sectors); |
505 | } | |
506 | ||
507 | int blk_write(BlockBackend *blk, int64_t sector_num, const uint8_t *buf, | |
508 | int nb_sectors) | |
509 | { | |
e7f7d676 HR |
510 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
511 | if (ret < 0) { | |
512 | return ret; | |
513 | } | |
514 | ||
4be74634 MA |
515 | return bdrv_write(blk->bs, sector_num, buf, nb_sectors); |
516 | } | |
517 | ||
e7f7d676 HR |
518 | static void error_callback_bh(void *opaque) |
519 | { | |
520 | struct BlockBackendAIOCB *acb = opaque; | |
521 | qemu_bh_delete(acb->bh); | |
522 | acb->common.cb(acb->common.opaque, acb->ret); | |
523 | qemu_aio_unref(acb); | |
524 | } | |
525 | ||
526 | static BlockAIOCB *abort_aio_request(BlockBackend *blk, BlockCompletionFunc *cb, | |
527 | void *opaque, int ret) | |
528 | { | |
529 | struct BlockBackendAIOCB *acb; | |
530 | QEMUBH *bh; | |
531 | ||
532 | acb = blk_aio_get(&block_backend_aiocb_info, blk, cb, opaque); | |
533 | acb->ret = ret; | |
534 | ||
535 | bh = aio_bh_new(blk_get_aio_context(blk), error_callback_bh, acb); | |
536 | acb->bh = bh; | |
537 | qemu_bh_schedule(bh); | |
538 | ||
539 | return &acb->common; | |
540 | } | |
541 | ||
4be74634 MA |
542 | BlockAIOCB *blk_aio_write_zeroes(BlockBackend *blk, int64_t sector_num, |
543 | int nb_sectors, BdrvRequestFlags flags, | |
544 | BlockCompletionFunc *cb, void *opaque) | |
545 | { | |
e7f7d676 HR |
546 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
547 | if (ret < 0) { | |
548 | return abort_aio_request(blk, cb, opaque, ret); | |
549 | } | |
550 | ||
4be74634 MA |
551 | return bdrv_aio_write_zeroes(blk->bs, sector_num, nb_sectors, flags, |
552 | cb, opaque); | |
553 | } | |
554 | ||
555 | int blk_pread(BlockBackend *blk, int64_t offset, void *buf, int count) | |
556 | { | |
e7f7d676 HR |
557 | int ret = blk_check_byte_request(blk, offset, count); |
558 | if (ret < 0) { | |
559 | return ret; | |
560 | } | |
561 | ||
4be74634 MA |
562 | return bdrv_pread(blk->bs, offset, buf, count); |
563 | } | |
564 | ||
565 | int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int count) | |
566 | { | |
e7f7d676 HR |
567 | int ret = blk_check_byte_request(blk, offset, count); |
568 | if (ret < 0) { | |
569 | return ret; | |
570 | } | |
571 | ||
4be74634 MA |
572 | return bdrv_pwrite(blk->bs, offset, buf, count); |
573 | } | |
574 | ||
575 | int64_t blk_getlength(BlockBackend *blk) | |
576 | { | |
577 | return bdrv_getlength(blk->bs); | |
578 | } | |
579 | ||
580 | void blk_get_geometry(BlockBackend *blk, uint64_t *nb_sectors_ptr) | |
581 | { | |
582 | bdrv_get_geometry(blk->bs, nb_sectors_ptr); | |
583 | } | |
584 | ||
1ef01253 HR |
585 | int64_t blk_nb_sectors(BlockBackend *blk) |
586 | { | |
587 | return bdrv_nb_sectors(blk->bs); | |
588 | } | |
589 | ||
4be74634 MA |
590 | BlockAIOCB *blk_aio_readv(BlockBackend *blk, int64_t sector_num, |
591 | QEMUIOVector *iov, int nb_sectors, | |
592 | BlockCompletionFunc *cb, void *opaque) | |
593 | { | |
e7f7d676 HR |
594 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
595 | if (ret < 0) { | |
596 | return abort_aio_request(blk, cb, opaque, ret); | |
597 | } | |
598 | ||
4be74634 MA |
599 | return bdrv_aio_readv(blk->bs, sector_num, iov, nb_sectors, cb, opaque); |
600 | } | |
601 | ||
602 | BlockAIOCB *blk_aio_writev(BlockBackend *blk, int64_t sector_num, | |
603 | QEMUIOVector *iov, int nb_sectors, | |
604 | BlockCompletionFunc *cb, void *opaque) | |
605 | { | |
e7f7d676 HR |
606 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
607 | if (ret < 0) { | |
608 | return abort_aio_request(blk, cb, opaque, ret); | |
609 | } | |
610 | ||
4be74634 MA |
611 | return bdrv_aio_writev(blk->bs, sector_num, iov, nb_sectors, cb, opaque); |
612 | } | |
613 | ||
614 | BlockAIOCB *blk_aio_flush(BlockBackend *blk, | |
615 | BlockCompletionFunc *cb, void *opaque) | |
616 | { | |
617 | return bdrv_aio_flush(blk->bs, cb, opaque); | |
618 | } | |
619 | ||
620 | BlockAIOCB *blk_aio_discard(BlockBackend *blk, | |
621 | int64_t sector_num, int nb_sectors, | |
622 | BlockCompletionFunc *cb, void *opaque) | |
623 | { | |
e7f7d676 HR |
624 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
625 | if (ret < 0) { | |
626 | return abort_aio_request(blk, cb, opaque, ret); | |
627 | } | |
628 | ||
4be74634 MA |
629 | return bdrv_aio_discard(blk->bs, sector_num, nb_sectors, cb, opaque); |
630 | } | |
631 | ||
632 | void blk_aio_cancel(BlockAIOCB *acb) | |
633 | { | |
634 | bdrv_aio_cancel(acb); | |
635 | } | |
636 | ||
637 | void blk_aio_cancel_async(BlockAIOCB *acb) | |
638 | { | |
639 | bdrv_aio_cancel_async(acb); | |
640 | } | |
641 | ||
642 | int blk_aio_multiwrite(BlockBackend *blk, BlockRequest *reqs, int num_reqs) | |
643 | { | |
e7f7d676 HR |
644 | int i, ret; |
645 | ||
646 | for (i = 0; i < num_reqs; i++) { | |
647 | ret = blk_check_request(blk, reqs[i].sector, reqs[i].nb_sectors); | |
648 | if (ret < 0) { | |
649 | return ret; | |
650 | } | |
651 | } | |
652 | ||
4be74634 MA |
653 | return bdrv_aio_multiwrite(blk->bs, reqs, num_reqs); |
654 | } | |
655 | ||
656 | int blk_ioctl(BlockBackend *blk, unsigned long int req, void *buf) | |
657 | { | |
658 | return bdrv_ioctl(blk->bs, req, buf); | |
659 | } | |
660 | ||
661 | BlockAIOCB *blk_aio_ioctl(BlockBackend *blk, unsigned long int req, void *buf, | |
662 | BlockCompletionFunc *cb, void *opaque) | |
663 | { | |
664 | return bdrv_aio_ioctl(blk->bs, req, buf, cb, opaque); | |
665 | } | |
666 | ||
2bb0dce7 HR |
667 | int blk_co_discard(BlockBackend *blk, int64_t sector_num, int nb_sectors) |
668 | { | |
e7f7d676 HR |
669 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
670 | if (ret < 0) { | |
671 | return ret; | |
672 | } | |
673 | ||
2bb0dce7 HR |
674 | return bdrv_co_discard(blk->bs, sector_num, nb_sectors); |
675 | } | |
676 | ||
677 | int blk_co_flush(BlockBackend *blk) | |
678 | { | |
679 | return bdrv_co_flush(blk->bs); | |
680 | } | |
681 | ||
4be74634 MA |
682 | int blk_flush(BlockBackend *blk) |
683 | { | |
684 | return bdrv_flush(blk->bs); | |
685 | } | |
686 | ||
687 | int blk_flush_all(void) | |
688 | { | |
689 | return bdrv_flush_all(); | |
690 | } | |
691 | ||
692 | void blk_drain_all(void) | |
693 | { | |
694 | bdrv_drain_all(); | |
695 | } | |
696 | ||
697 | BlockdevOnError blk_get_on_error(BlockBackend *blk, bool is_read) | |
698 | { | |
699 | return bdrv_get_on_error(blk->bs, is_read); | |
700 | } | |
701 | ||
702 | BlockErrorAction blk_get_error_action(BlockBackend *blk, bool is_read, | |
703 | int error) | |
704 | { | |
705 | return bdrv_get_error_action(blk->bs, is_read, error); | |
706 | } | |
707 | ||
708 | void blk_error_action(BlockBackend *blk, BlockErrorAction action, | |
709 | bool is_read, int error) | |
710 | { | |
711 | bdrv_error_action(blk->bs, action, is_read, error); | |
712 | } | |
713 | ||
714 | int blk_is_read_only(BlockBackend *blk) | |
715 | { | |
716 | return bdrv_is_read_only(blk->bs); | |
717 | } | |
718 | ||
719 | int blk_is_sg(BlockBackend *blk) | |
720 | { | |
721 | return bdrv_is_sg(blk->bs); | |
722 | } | |
723 | ||
724 | int blk_enable_write_cache(BlockBackend *blk) | |
725 | { | |
726 | return bdrv_enable_write_cache(blk->bs); | |
727 | } | |
728 | ||
729 | void blk_set_enable_write_cache(BlockBackend *blk, bool wce) | |
730 | { | |
731 | bdrv_set_enable_write_cache(blk->bs, wce); | |
732 | } | |
733 | ||
2bb0dce7 HR |
734 | void blk_invalidate_cache(BlockBackend *blk, Error **errp) |
735 | { | |
736 | bdrv_invalidate_cache(blk->bs, errp); | |
737 | } | |
738 | ||
4be74634 MA |
739 | int blk_is_inserted(BlockBackend *blk) |
740 | { | |
741 | return bdrv_is_inserted(blk->bs); | |
742 | } | |
743 | ||
744 | void blk_lock_medium(BlockBackend *blk, bool locked) | |
745 | { | |
746 | bdrv_lock_medium(blk->bs, locked); | |
747 | } | |
748 | ||
749 | void blk_eject(BlockBackend *blk, bool eject_flag) | |
750 | { | |
751 | bdrv_eject(blk->bs, eject_flag); | |
752 | } | |
753 | ||
754 | int blk_get_flags(BlockBackend *blk) | |
755 | { | |
756 | return bdrv_get_flags(blk->bs); | |
757 | } | |
758 | ||
454057b7 PL |
759 | int blk_get_max_transfer_length(BlockBackend *blk) |
760 | { | |
761 | return blk->bs->bl.max_transfer_length; | |
762 | } | |
763 | ||
4be74634 MA |
764 | void blk_set_guest_block_size(BlockBackend *blk, int align) |
765 | { | |
766 | bdrv_set_guest_block_size(blk->bs, align); | |
767 | } | |
768 | ||
769 | void *blk_blockalign(BlockBackend *blk, size_t size) | |
770 | { | |
771 | return qemu_blockalign(blk ? blk->bs : NULL, size); | |
772 | } | |
773 | ||
774 | bool blk_op_is_blocked(BlockBackend *blk, BlockOpType op, Error **errp) | |
775 | { | |
776 | return bdrv_op_is_blocked(blk->bs, op, errp); | |
777 | } | |
778 | ||
779 | void blk_op_unblock(BlockBackend *blk, BlockOpType op, Error *reason) | |
780 | { | |
781 | bdrv_op_unblock(blk->bs, op, reason); | |
782 | } | |
783 | ||
784 | void blk_op_block_all(BlockBackend *blk, Error *reason) | |
785 | { | |
786 | bdrv_op_block_all(blk->bs, reason); | |
787 | } | |
788 | ||
789 | void blk_op_unblock_all(BlockBackend *blk, Error *reason) | |
790 | { | |
791 | bdrv_op_unblock_all(blk->bs, reason); | |
792 | } | |
793 | ||
794 | AioContext *blk_get_aio_context(BlockBackend *blk) | |
795 | { | |
796 | return bdrv_get_aio_context(blk->bs); | |
797 | } | |
798 | ||
799 | void blk_set_aio_context(BlockBackend *blk, AioContext *new_context) | |
800 | { | |
801 | bdrv_set_aio_context(blk->bs, new_context); | |
802 | } | |
803 | ||
2019ba0a HR |
804 | void blk_add_aio_context_notifier(BlockBackend *blk, |
805 | void (*attached_aio_context)(AioContext *new_context, void *opaque), | |
806 | void (*detach_aio_context)(void *opaque), void *opaque) | |
807 | { | |
808 | bdrv_add_aio_context_notifier(blk->bs, attached_aio_context, | |
809 | detach_aio_context, opaque); | |
810 | } | |
811 | ||
812 | void blk_remove_aio_context_notifier(BlockBackend *blk, | |
813 | void (*attached_aio_context)(AioContext *, | |
814 | void *), | |
815 | void (*detach_aio_context)(void *), | |
816 | void *opaque) | |
817 | { | |
818 | bdrv_remove_aio_context_notifier(blk->bs, attached_aio_context, | |
819 | detach_aio_context, opaque); | |
820 | } | |
821 | ||
2c28b21f HR |
822 | void blk_add_close_notifier(BlockBackend *blk, Notifier *notify) |
823 | { | |
824 | bdrv_add_close_notifier(blk->bs, notify); | |
825 | } | |
826 | ||
4be74634 MA |
827 | void blk_io_plug(BlockBackend *blk) |
828 | { | |
829 | bdrv_io_plug(blk->bs); | |
830 | } | |
831 | ||
832 | void blk_io_unplug(BlockBackend *blk) | |
833 | { | |
834 | bdrv_io_unplug(blk->bs); | |
835 | } | |
836 | ||
837 | BlockAcctStats *blk_get_stats(BlockBackend *blk) | |
838 | { | |
839 | return bdrv_get_stats(blk->bs); | |
840 | } | |
841 | ||
842 | void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk, | |
843 | BlockCompletionFunc *cb, void *opaque) | |
844 | { | |
845 | return qemu_aio_get(aiocb_info, blk_bs(blk), cb, opaque); | |
846 | } | |
1ef01253 HR |
847 | |
848 | int coroutine_fn blk_co_write_zeroes(BlockBackend *blk, int64_t sector_num, | |
849 | int nb_sectors, BdrvRequestFlags flags) | |
850 | { | |
e7f7d676 HR |
851 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
852 | if (ret < 0) { | |
853 | return ret; | |
854 | } | |
855 | ||
1ef01253 HR |
856 | return bdrv_co_write_zeroes(blk->bs, sector_num, nb_sectors, flags); |
857 | } | |
858 | ||
859 | int blk_write_compressed(BlockBackend *blk, int64_t sector_num, | |
860 | const uint8_t *buf, int nb_sectors) | |
861 | { | |
e7f7d676 HR |
862 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
863 | if (ret < 0) { | |
864 | return ret; | |
865 | } | |
866 | ||
1ef01253 HR |
867 | return bdrv_write_compressed(blk->bs, sector_num, buf, nb_sectors); |
868 | } | |
869 | ||
870 | int blk_truncate(BlockBackend *blk, int64_t offset) | |
871 | { | |
872 | return bdrv_truncate(blk->bs, offset); | |
873 | } | |
874 | ||
875 | int blk_discard(BlockBackend *blk, int64_t sector_num, int nb_sectors) | |
876 | { | |
e7f7d676 HR |
877 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
878 | if (ret < 0) { | |
879 | return ret; | |
880 | } | |
881 | ||
1ef01253 HR |
882 | return bdrv_discard(blk->bs, sector_num, nb_sectors); |
883 | } | |
884 | ||
885 | int blk_save_vmstate(BlockBackend *blk, const uint8_t *buf, | |
886 | int64_t pos, int size) | |
887 | { | |
888 | return bdrv_save_vmstate(blk->bs, buf, pos, size); | |
889 | } | |
890 | ||
891 | int blk_load_vmstate(BlockBackend *blk, uint8_t *buf, int64_t pos, int size) | |
892 | { | |
893 | return bdrv_load_vmstate(blk->bs, buf, pos, size); | |
894 | } | |
f0272c4d ET |
895 | |
896 | int blk_probe_blocksizes(BlockBackend *blk, BlockSizes *bsz) | |
897 | { | |
898 | return bdrv_probe_blocksizes(blk->bs, bsz); | |
899 | } | |
900 | ||
901 | int blk_probe_geometry(BlockBackend *blk, HDGeometry *geo) | |
902 | { | |
903 | return bdrv_probe_geometry(blk->bs, geo); | |
904 | } |