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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 | 20 | |
4981bdec HR |
21 | static AioContext *blk_aiocb_get_aio_context(BlockAIOCB *acb); |
22 | ||
26f54e9a MA |
23 | struct BlockBackend { |
24 | char *name; | |
25 | int refcnt; | |
7e7d56d9 | 26 | BlockDriverState *bs; |
26f8b3a8 | 27 | DriveInfo *legacy_dinfo; /* null unless created by drive_new() */ |
26f54e9a | 28 | QTAILQ_ENTRY(BlockBackend) link; /* for blk_backends */ |
a7f53e26 MA |
29 | |
30 | void *dev; /* attached device model, if any */ | |
31 | /* TODO change to DeviceState when all users are qdevified */ | |
32 | const BlockDevOps *dev_ops; | |
33 | void *dev_opaque; | |
68e9ec01 HR |
34 | |
35 | /* the block size for which the guest device expects atomicity */ | |
36 | int guest_block_size; | |
26f54e9a MA |
37 | }; |
38 | ||
e7f7d676 HR |
39 | typedef struct BlockBackendAIOCB { |
40 | BlockAIOCB common; | |
41 | QEMUBH *bh; | |
4981bdec | 42 | BlockBackend *blk; |
e7f7d676 HR |
43 | int ret; |
44 | } BlockBackendAIOCB; | |
45 | ||
46 | static const AIOCBInfo block_backend_aiocb_info = { | |
4981bdec | 47 | .get_aio_context = blk_aiocb_get_aio_context, |
e7f7d676 HR |
48 | .aiocb_size = sizeof(BlockBackendAIOCB), |
49 | }; | |
50 | ||
8fb3c76c MA |
51 | static void drive_info_del(DriveInfo *dinfo); |
52 | ||
7e7d56d9 | 53 | /* All the BlockBackends (except for hidden ones) */ |
26f54e9a MA |
54 | static QTAILQ_HEAD(, BlockBackend) blk_backends = |
55 | QTAILQ_HEAD_INITIALIZER(blk_backends); | |
56 | ||
57 | /* | |
58 | * Create a new BlockBackend with @name, with a reference count of one. | |
59 | * @name must not be null or empty. | |
60 | * Fail if a BlockBackend with this name already exists. | |
61 | * Store an error through @errp on failure, unless it's null. | |
62 | * Return the new BlockBackend on success, null on failure. | |
63 | */ | |
64 | BlockBackend *blk_new(const char *name, Error **errp) | |
65 | { | |
66 | BlockBackend *blk; | |
67 | ||
68 | assert(name && name[0]); | |
7f06d47e MA |
69 | if (!id_wellformed(name)) { |
70 | error_setg(errp, "Invalid device name"); | |
71 | return NULL; | |
72 | } | |
26f54e9a MA |
73 | if (blk_by_name(name)) { |
74 | error_setg(errp, "Device with id '%s' already exists", name); | |
75 | return NULL; | |
76 | } | |
7f06d47e MA |
77 | if (bdrv_find_node(name)) { |
78 | error_setg(errp, | |
79 | "Device name '%s' conflicts with an existing node name", | |
80 | name); | |
81 | return NULL; | |
82 | } | |
26f54e9a MA |
83 | |
84 | blk = g_new0(BlockBackend, 1); | |
85 | blk->name = g_strdup(name); | |
86 | blk->refcnt = 1; | |
87 | QTAILQ_INSERT_TAIL(&blk_backends, blk, link); | |
88 | return blk; | |
89 | } | |
90 | ||
7e7d56d9 MA |
91 | /* |
92 | * Create a new BlockBackend with a new BlockDriverState attached. | |
7e7d56d9 MA |
93 | * Otherwise just like blk_new(), which see. |
94 | */ | |
95 | BlockBackend *blk_new_with_bs(const char *name, Error **errp) | |
96 | { | |
97 | BlockBackend *blk; | |
98 | BlockDriverState *bs; | |
99 | ||
100 | blk = blk_new(name, errp); | |
101 | if (!blk) { | |
102 | return NULL; | |
103 | } | |
104 | ||
7f06d47e | 105 | bs = bdrv_new_root(); |
7e7d56d9 MA |
106 | blk->bs = bs; |
107 | bs->blk = blk; | |
108 | return blk; | |
109 | } | |
110 | ||
ca49a4fd HR |
111 | /* |
112 | * Calls blk_new_with_bs() and then calls bdrv_open() on the BlockDriverState. | |
113 | * | |
114 | * Just as with bdrv_open(), after having called this function the reference to | |
115 | * @options belongs to the block layer (even on failure). | |
116 | * | |
117 | * TODO: Remove @filename and @flags; it should be possible to specify a whole | |
118 | * BDS tree just by specifying the @options QDict (or @reference, | |
119 | * alternatively). At the time of adding this function, this is not possible, | |
120 | * though, so callers of this function have to be able to specify @filename and | |
121 | * @flags. | |
122 | */ | |
123 | BlockBackend *blk_new_open(const char *name, const char *filename, | |
124 | const char *reference, QDict *options, int flags, | |
125 | Error **errp) | |
126 | { | |
127 | BlockBackend *blk; | |
128 | int ret; | |
129 | ||
130 | blk = blk_new_with_bs(name, errp); | |
131 | if (!blk) { | |
132 | QDECREF(options); | |
133 | return NULL; | |
134 | } | |
135 | ||
6ebf9aa2 | 136 | ret = bdrv_open(&blk->bs, filename, reference, options, flags, errp); |
ca49a4fd HR |
137 | if (ret < 0) { |
138 | blk_unref(blk); | |
139 | return NULL; | |
140 | } | |
141 | ||
142 | return blk; | |
143 | } | |
144 | ||
26f54e9a MA |
145 | static void blk_delete(BlockBackend *blk) |
146 | { | |
147 | assert(!blk->refcnt); | |
a7f53e26 | 148 | assert(!blk->dev); |
7e7d56d9 | 149 | if (blk->bs) { |
9ba10c95 | 150 | assert(blk->bs->blk == blk); |
7e7d56d9 | 151 | blk->bs->blk = NULL; |
9ba10c95 | 152 | bdrv_unref(blk->bs); |
7e7d56d9 MA |
153 | blk->bs = NULL; |
154 | } | |
3e5a50d6 | 155 | /* Avoid double-remove after blk_hide_on_behalf_of_hmp_drive_del() */ |
7e7d56d9 MA |
156 | if (blk->name[0]) { |
157 | QTAILQ_REMOVE(&blk_backends, blk, link); | |
158 | } | |
26f54e9a | 159 | g_free(blk->name); |
18e46a03 | 160 | drive_info_del(blk->legacy_dinfo); |
26f54e9a MA |
161 | g_free(blk); |
162 | } | |
163 | ||
8fb3c76c MA |
164 | static void drive_info_del(DriveInfo *dinfo) |
165 | { | |
166 | if (!dinfo) { | |
167 | return; | |
168 | } | |
169 | qemu_opts_del(dinfo->opts); | |
8fb3c76c MA |
170 | g_free(dinfo->serial); |
171 | g_free(dinfo); | |
172 | } | |
173 | ||
26f54e9a MA |
174 | /* |
175 | * Increment @blk's reference count. | |
176 | * @blk must not be null. | |
177 | */ | |
178 | void blk_ref(BlockBackend *blk) | |
179 | { | |
180 | blk->refcnt++; | |
181 | } | |
182 | ||
183 | /* | |
184 | * Decrement @blk's reference count. | |
185 | * If this drops it to zero, destroy @blk. | |
186 | * For convenience, do nothing if @blk is null. | |
187 | */ | |
188 | void blk_unref(BlockBackend *blk) | |
189 | { | |
190 | if (blk) { | |
191 | assert(blk->refcnt > 0); | |
192 | if (!--blk->refcnt) { | |
193 | blk_delete(blk); | |
194 | } | |
195 | } | |
196 | } | |
197 | ||
198 | /* | |
199 | * Return the BlockBackend after @blk. | |
200 | * If @blk is null, return the first one. | |
201 | * Else, return @blk's next sibling, which may be null. | |
202 | * | |
203 | * To iterate over all BlockBackends, do | |
204 | * for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { | |
205 | * ... | |
206 | * } | |
207 | */ | |
208 | BlockBackend *blk_next(BlockBackend *blk) | |
209 | { | |
210 | return blk ? QTAILQ_NEXT(blk, link) : QTAILQ_FIRST(&blk_backends); | |
211 | } | |
212 | ||
213 | /* | |
7e7d56d9 MA |
214 | * Return @blk's name, a non-null string. |
215 | * Wart: the name is empty iff @blk has been hidden with | |
3e5a50d6 | 216 | * blk_hide_on_behalf_of_hmp_drive_del(). |
26f54e9a MA |
217 | */ |
218 | const char *blk_name(BlockBackend *blk) | |
219 | { | |
220 | return blk->name; | |
221 | } | |
222 | ||
223 | /* | |
224 | * Return the BlockBackend with name @name if it exists, else null. | |
225 | * @name must not be null. | |
226 | */ | |
227 | BlockBackend *blk_by_name(const char *name) | |
228 | { | |
229 | BlockBackend *blk; | |
230 | ||
231 | assert(name); | |
232 | QTAILQ_FOREACH(blk, &blk_backends, link) { | |
233 | if (!strcmp(name, blk->name)) { | |
234 | return blk; | |
235 | } | |
236 | } | |
237 | return NULL; | |
238 | } | |
7e7d56d9 MA |
239 | |
240 | /* | |
241 | * Return the BlockDriverState attached to @blk if any, else null. | |
242 | */ | |
243 | BlockDriverState *blk_bs(BlockBackend *blk) | |
244 | { | |
245 | return blk->bs; | |
246 | } | |
247 | ||
a2d61900 KW |
248 | /* |
249 | * Changes the BlockDriverState attached to @blk | |
250 | */ | |
251 | void blk_set_bs(BlockBackend *blk, BlockDriverState *bs) | |
252 | { | |
253 | bdrv_ref(bs); | |
254 | ||
255 | if (blk->bs) { | |
256 | blk->bs->blk = NULL; | |
257 | bdrv_unref(blk->bs); | |
258 | } | |
259 | assert(bs->blk == NULL); | |
260 | ||
261 | blk->bs = bs; | |
262 | bs->blk = blk; | |
263 | } | |
264 | ||
18e46a03 MA |
265 | /* |
266 | * Return @blk's DriveInfo if any, else null. | |
267 | */ | |
268 | DriveInfo *blk_legacy_dinfo(BlockBackend *blk) | |
269 | { | |
270 | return blk->legacy_dinfo; | |
271 | } | |
272 | ||
273 | /* | |
274 | * Set @blk's DriveInfo to @dinfo, and return it. | |
275 | * @blk must not have a DriveInfo set already. | |
276 | * No other BlockBackend may have the same DriveInfo set. | |
277 | */ | |
278 | DriveInfo *blk_set_legacy_dinfo(BlockBackend *blk, DriveInfo *dinfo) | |
279 | { | |
280 | assert(!blk->legacy_dinfo); | |
281 | return blk->legacy_dinfo = dinfo; | |
282 | } | |
283 | ||
284 | /* | |
285 | * Return the BlockBackend with DriveInfo @dinfo. | |
286 | * It must exist. | |
287 | */ | |
288 | BlockBackend *blk_by_legacy_dinfo(DriveInfo *dinfo) | |
289 | { | |
290 | BlockBackend *blk; | |
291 | ||
292 | QTAILQ_FOREACH(blk, &blk_backends, link) { | |
293 | if (blk->legacy_dinfo == dinfo) { | |
294 | return blk; | |
295 | } | |
296 | } | |
297 | abort(); | |
298 | } | |
299 | ||
7e7d56d9 MA |
300 | /* |
301 | * Hide @blk. | |
302 | * @blk must not have been hidden already. | |
303 | * Make attached BlockDriverState, if any, anonymous. | |
304 | * Once hidden, @blk is invisible to all functions that don't receive | |
305 | * it as argument. For example, blk_by_name() won't return it. | |
306 | * Strictly for use by do_drive_del(). | |
307 | * TODO get rid of it! | |
308 | */ | |
3e5a50d6 | 309 | void blk_hide_on_behalf_of_hmp_drive_del(BlockBackend *blk) |
7e7d56d9 MA |
310 | { |
311 | QTAILQ_REMOVE(&blk_backends, blk, link); | |
312 | blk->name[0] = 0; | |
313 | if (blk->bs) { | |
314 | bdrv_make_anon(blk->bs); | |
315 | } | |
316 | } | |
4be74634 | 317 | |
a7f53e26 MA |
318 | /* |
319 | * Attach device model @dev to @blk. | |
320 | * Return 0 on success, -EBUSY when a device model is attached already. | |
321 | */ | |
4be74634 | 322 | int blk_attach_dev(BlockBackend *blk, void *dev) |
a7f53e26 | 323 | /* TODO change to DeviceState *dev when all users are qdevified */ |
4be74634 | 324 | { |
a7f53e26 MA |
325 | if (blk->dev) { |
326 | return -EBUSY; | |
327 | } | |
84ebe375 | 328 | blk_ref(blk); |
a7f53e26 MA |
329 | blk->dev = dev; |
330 | bdrv_iostatus_reset(blk->bs); | |
a7f53e26 | 331 | return 0; |
4be74634 MA |
332 | } |
333 | ||
a7f53e26 MA |
334 | /* |
335 | * Attach device model @dev to @blk. | |
336 | * @blk must not have a device model attached already. | |
337 | * TODO qdevified devices don't use this, remove when devices are qdevified | |
338 | */ | |
4be74634 MA |
339 | void blk_attach_dev_nofail(BlockBackend *blk, void *dev) |
340 | { | |
a7f53e26 MA |
341 | if (blk_attach_dev(blk, dev) < 0) { |
342 | abort(); | |
343 | } | |
4be74634 MA |
344 | } |
345 | ||
a7f53e26 MA |
346 | /* |
347 | * Detach device model @dev from @blk. | |
348 | * @dev must be currently attached to @blk. | |
349 | */ | |
4be74634 | 350 | void blk_detach_dev(BlockBackend *blk, void *dev) |
a7f53e26 | 351 | /* TODO change to DeviceState *dev when all users are qdevified */ |
4be74634 | 352 | { |
a7f53e26 MA |
353 | assert(blk->dev == dev); |
354 | blk->dev = NULL; | |
355 | blk->dev_ops = NULL; | |
356 | blk->dev_opaque = NULL; | |
68e9ec01 | 357 | blk->guest_block_size = 512; |
84ebe375 | 358 | blk_unref(blk); |
4be74634 MA |
359 | } |
360 | ||
a7f53e26 MA |
361 | /* |
362 | * Return the device model attached to @blk if any, else null. | |
363 | */ | |
4be74634 | 364 | void *blk_get_attached_dev(BlockBackend *blk) |
a7f53e26 MA |
365 | /* TODO change to return DeviceState * when all users are qdevified */ |
366 | { | |
367 | return blk->dev; | |
368 | } | |
369 | ||
370 | /* | |
371 | * Set @blk's device model callbacks to @ops. | |
372 | * @opaque is the opaque argument to pass to the callbacks. | |
373 | * This is for use by device models. | |
374 | */ | |
375 | void blk_set_dev_ops(BlockBackend *blk, const BlockDevOps *ops, | |
376 | void *opaque) | |
377 | { | |
378 | blk->dev_ops = ops; | |
379 | blk->dev_opaque = opaque; | |
380 | } | |
381 | ||
382 | /* | |
383 | * Notify @blk's attached device model of media change. | |
384 | * If @load is true, notify of media load. | |
385 | * Else, notify of media eject. | |
386 | * Also send DEVICE_TRAY_MOVED events as appropriate. | |
387 | */ | |
388 | void blk_dev_change_media_cb(BlockBackend *blk, bool load) | |
389 | { | |
390 | if (blk->dev_ops && blk->dev_ops->change_media_cb) { | |
391 | bool tray_was_closed = !blk_dev_is_tray_open(blk); | |
392 | ||
393 | blk->dev_ops->change_media_cb(blk->dev_opaque, load); | |
394 | if (tray_was_closed) { | |
395 | /* tray open */ | |
396 | qapi_event_send_device_tray_moved(blk_name(blk), | |
397 | true, &error_abort); | |
398 | } | |
399 | if (load) { | |
400 | /* tray close */ | |
401 | qapi_event_send_device_tray_moved(blk_name(blk), | |
402 | false, &error_abort); | |
403 | } | |
404 | } | |
405 | } | |
406 | ||
407 | /* | |
408 | * Does @blk's attached device model have removable media? | |
409 | * %true if no device model is attached. | |
410 | */ | |
411 | bool blk_dev_has_removable_media(BlockBackend *blk) | |
412 | { | |
413 | return !blk->dev || (blk->dev_ops && blk->dev_ops->change_media_cb); | |
414 | } | |
415 | ||
416 | /* | |
417 | * Notify @blk's attached device model of a media eject request. | |
418 | * If @force is true, the medium is about to be yanked out forcefully. | |
419 | */ | |
420 | void blk_dev_eject_request(BlockBackend *blk, bool force) | |
4be74634 | 421 | { |
a7f53e26 MA |
422 | if (blk->dev_ops && blk->dev_ops->eject_request_cb) { |
423 | blk->dev_ops->eject_request_cb(blk->dev_opaque, force); | |
424 | } | |
4be74634 MA |
425 | } |
426 | ||
a7f53e26 MA |
427 | /* |
428 | * Does @blk's attached device model have a tray, and is it open? | |
429 | */ | |
430 | bool blk_dev_is_tray_open(BlockBackend *blk) | |
4be74634 | 431 | { |
a7f53e26 MA |
432 | if (blk->dev_ops && blk->dev_ops->is_tray_open) { |
433 | return blk->dev_ops->is_tray_open(blk->dev_opaque); | |
434 | } | |
435 | return false; | |
436 | } | |
437 | ||
438 | /* | |
439 | * Does @blk's attached device model have the medium locked? | |
440 | * %false if the device model has no such lock. | |
441 | */ | |
442 | bool blk_dev_is_medium_locked(BlockBackend *blk) | |
443 | { | |
444 | if (blk->dev_ops && blk->dev_ops->is_medium_locked) { | |
445 | return blk->dev_ops->is_medium_locked(blk->dev_opaque); | |
446 | } | |
447 | return false; | |
448 | } | |
449 | ||
450 | /* | |
451 | * Notify @blk's attached device model of a backend size change. | |
452 | */ | |
453 | void blk_dev_resize_cb(BlockBackend *blk) | |
454 | { | |
455 | if (blk->dev_ops && blk->dev_ops->resize_cb) { | |
456 | blk->dev_ops->resize_cb(blk->dev_opaque); | |
457 | } | |
458 | } | |
459 | ||
460 | void blk_iostatus_enable(BlockBackend *blk) | |
461 | { | |
462 | bdrv_iostatus_enable(blk->bs); | |
4be74634 MA |
463 | } |
464 | ||
e7f7d676 HR |
465 | static int blk_check_byte_request(BlockBackend *blk, int64_t offset, |
466 | size_t size) | |
467 | { | |
468 | int64_t len; | |
469 | ||
470 | if (size > INT_MAX) { | |
471 | return -EIO; | |
472 | } | |
473 | ||
474 | if (!blk_is_inserted(blk)) { | |
475 | return -ENOMEDIUM; | |
476 | } | |
477 | ||
478 | len = blk_getlength(blk); | |
479 | if (len < 0) { | |
480 | return len; | |
481 | } | |
482 | ||
483 | if (offset < 0) { | |
484 | return -EIO; | |
485 | } | |
486 | ||
487 | if (offset > len || len - offset < size) { | |
488 | return -EIO; | |
489 | } | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
494 | static int blk_check_request(BlockBackend *blk, int64_t sector_num, | |
495 | int nb_sectors) | |
496 | { | |
497 | if (sector_num < 0 || sector_num > INT64_MAX / BDRV_SECTOR_SIZE) { | |
498 | return -EIO; | |
499 | } | |
500 | ||
501 | if (nb_sectors < 0 || nb_sectors > INT_MAX / BDRV_SECTOR_SIZE) { | |
502 | return -EIO; | |
503 | } | |
504 | ||
505 | return blk_check_byte_request(blk, sector_num * BDRV_SECTOR_SIZE, | |
506 | nb_sectors * BDRV_SECTOR_SIZE); | |
507 | } | |
508 | ||
4be74634 MA |
509 | int blk_read(BlockBackend *blk, int64_t sector_num, uint8_t *buf, |
510 | int nb_sectors) | |
511 | { | |
e7f7d676 HR |
512 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
513 | if (ret < 0) { | |
514 | return ret; | |
515 | } | |
516 | ||
4be74634 MA |
517 | return bdrv_read(blk->bs, sector_num, buf, nb_sectors); |
518 | } | |
519 | ||
520 | int blk_read_unthrottled(BlockBackend *blk, int64_t sector_num, uint8_t *buf, | |
521 | int nb_sectors) | |
522 | { | |
e7f7d676 HR |
523 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
524 | if (ret < 0) { | |
525 | return ret; | |
526 | } | |
527 | ||
4be74634 MA |
528 | return bdrv_read_unthrottled(blk->bs, sector_num, buf, nb_sectors); |
529 | } | |
530 | ||
531 | int blk_write(BlockBackend *blk, int64_t sector_num, const uint8_t *buf, | |
532 | int nb_sectors) | |
533 | { | |
e7f7d676 HR |
534 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
535 | if (ret < 0) { | |
536 | return ret; | |
537 | } | |
538 | ||
4be74634 MA |
539 | return bdrv_write(blk->bs, sector_num, buf, nb_sectors); |
540 | } | |
541 | ||
0df89e8e KW |
542 | int blk_write_zeroes(BlockBackend *blk, int64_t sector_num, |
543 | int nb_sectors, BdrvRequestFlags flags) | |
544 | { | |
545 | int ret = blk_check_request(blk, sector_num, nb_sectors); | |
546 | if (ret < 0) { | |
547 | return ret; | |
548 | } | |
549 | ||
550 | return bdrv_write_zeroes(blk->bs, sector_num, nb_sectors, flags); | |
551 | } | |
552 | ||
e7f7d676 HR |
553 | static void error_callback_bh(void *opaque) |
554 | { | |
555 | struct BlockBackendAIOCB *acb = opaque; | |
556 | qemu_bh_delete(acb->bh); | |
557 | acb->common.cb(acb->common.opaque, acb->ret); | |
558 | qemu_aio_unref(acb); | |
559 | } | |
560 | ||
561 | static BlockAIOCB *abort_aio_request(BlockBackend *blk, BlockCompletionFunc *cb, | |
562 | void *opaque, int ret) | |
563 | { | |
564 | struct BlockBackendAIOCB *acb; | |
565 | QEMUBH *bh; | |
566 | ||
567 | acb = blk_aio_get(&block_backend_aiocb_info, blk, cb, opaque); | |
4981bdec | 568 | acb->blk = blk; |
e7f7d676 HR |
569 | acb->ret = ret; |
570 | ||
571 | bh = aio_bh_new(blk_get_aio_context(blk), error_callback_bh, acb); | |
572 | acb->bh = bh; | |
573 | qemu_bh_schedule(bh); | |
574 | ||
575 | return &acb->common; | |
576 | } | |
577 | ||
4be74634 MA |
578 | BlockAIOCB *blk_aio_write_zeroes(BlockBackend *blk, int64_t sector_num, |
579 | int nb_sectors, BdrvRequestFlags flags, | |
580 | BlockCompletionFunc *cb, void *opaque) | |
581 | { | |
e7f7d676 HR |
582 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
583 | if (ret < 0) { | |
584 | return abort_aio_request(blk, cb, opaque, ret); | |
585 | } | |
586 | ||
4be74634 MA |
587 | return bdrv_aio_write_zeroes(blk->bs, sector_num, nb_sectors, flags, |
588 | cb, opaque); | |
589 | } | |
590 | ||
591 | int blk_pread(BlockBackend *blk, int64_t offset, void *buf, int count) | |
592 | { | |
e7f7d676 HR |
593 | int ret = blk_check_byte_request(blk, offset, count); |
594 | if (ret < 0) { | |
595 | return ret; | |
596 | } | |
597 | ||
4be74634 MA |
598 | return bdrv_pread(blk->bs, offset, buf, count); |
599 | } | |
600 | ||
601 | int blk_pwrite(BlockBackend *blk, int64_t offset, const void *buf, int count) | |
602 | { | |
e7f7d676 HR |
603 | int ret = blk_check_byte_request(blk, offset, count); |
604 | if (ret < 0) { | |
605 | return ret; | |
606 | } | |
607 | ||
4be74634 MA |
608 | return bdrv_pwrite(blk->bs, offset, buf, count); |
609 | } | |
610 | ||
611 | int64_t blk_getlength(BlockBackend *blk) | |
612 | { | |
613 | return bdrv_getlength(blk->bs); | |
614 | } | |
615 | ||
616 | void blk_get_geometry(BlockBackend *blk, uint64_t *nb_sectors_ptr) | |
617 | { | |
618 | bdrv_get_geometry(blk->bs, nb_sectors_ptr); | |
619 | } | |
620 | ||
1ef01253 HR |
621 | int64_t blk_nb_sectors(BlockBackend *blk) |
622 | { | |
623 | return bdrv_nb_sectors(blk->bs); | |
624 | } | |
625 | ||
4be74634 MA |
626 | BlockAIOCB *blk_aio_readv(BlockBackend *blk, int64_t sector_num, |
627 | QEMUIOVector *iov, int nb_sectors, | |
628 | BlockCompletionFunc *cb, void *opaque) | |
629 | { | |
e7f7d676 HR |
630 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
631 | if (ret < 0) { | |
632 | return abort_aio_request(blk, cb, opaque, ret); | |
633 | } | |
634 | ||
4be74634 MA |
635 | return bdrv_aio_readv(blk->bs, sector_num, iov, nb_sectors, cb, opaque); |
636 | } | |
637 | ||
638 | BlockAIOCB *blk_aio_writev(BlockBackend *blk, int64_t sector_num, | |
639 | QEMUIOVector *iov, int nb_sectors, | |
640 | BlockCompletionFunc *cb, void *opaque) | |
641 | { | |
e7f7d676 HR |
642 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
643 | if (ret < 0) { | |
644 | return abort_aio_request(blk, cb, opaque, ret); | |
645 | } | |
646 | ||
4be74634 MA |
647 | return bdrv_aio_writev(blk->bs, sector_num, iov, nb_sectors, cb, opaque); |
648 | } | |
649 | ||
650 | BlockAIOCB *blk_aio_flush(BlockBackend *blk, | |
651 | BlockCompletionFunc *cb, void *opaque) | |
652 | { | |
653 | return bdrv_aio_flush(blk->bs, cb, opaque); | |
654 | } | |
655 | ||
656 | BlockAIOCB *blk_aio_discard(BlockBackend *blk, | |
657 | int64_t sector_num, int nb_sectors, | |
658 | BlockCompletionFunc *cb, void *opaque) | |
659 | { | |
e7f7d676 HR |
660 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
661 | if (ret < 0) { | |
662 | return abort_aio_request(blk, cb, opaque, ret); | |
663 | } | |
664 | ||
4be74634 MA |
665 | return bdrv_aio_discard(blk->bs, sector_num, nb_sectors, cb, opaque); |
666 | } | |
667 | ||
668 | void blk_aio_cancel(BlockAIOCB *acb) | |
669 | { | |
670 | bdrv_aio_cancel(acb); | |
671 | } | |
672 | ||
673 | void blk_aio_cancel_async(BlockAIOCB *acb) | |
674 | { | |
675 | bdrv_aio_cancel_async(acb); | |
676 | } | |
677 | ||
678 | int blk_aio_multiwrite(BlockBackend *blk, BlockRequest *reqs, int num_reqs) | |
679 | { | |
e7f7d676 HR |
680 | int i, ret; |
681 | ||
682 | for (i = 0; i < num_reqs; i++) { | |
683 | ret = blk_check_request(blk, reqs[i].sector, reqs[i].nb_sectors); | |
684 | if (ret < 0) { | |
685 | return ret; | |
686 | } | |
687 | } | |
688 | ||
4be74634 MA |
689 | return bdrv_aio_multiwrite(blk->bs, reqs, num_reqs); |
690 | } | |
691 | ||
692 | int blk_ioctl(BlockBackend *blk, unsigned long int req, void *buf) | |
693 | { | |
694 | return bdrv_ioctl(blk->bs, req, buf); | |
695 | } | |
696 | ||
697 | BlockAIOCB *blk_aio_ioctl(BlockBackend *blk, unsigned long int req, void *buf, | |
698 | BlockCompletionFunc *cb, void *opaque) | |
699 | { | |
700 | return bdrv_aio_ioctl(blk->bs, req, buf, cb, opaque); | |
701 | } | |
702 | ||
2bb0dce7 HR |
703 | int blk_co_discard(BlockBackend *blk, int64_t sector_num, int nb_sectors) |
704 | { | |
e7f7d676 HR |
705 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
706 | if (ret < 0) { | |
707 | return ret; | |
708 | } | |
709 | ||
2bb0dce7 HR |
710 | return bdrv_co_discard(blk->bs, sector_num, nb_sectors); |
711 | } | |
712 | ||
713 | int blk_co_flush(BlockBackend *blk) | |
714 | { | |
715 | return bdrv_co_flush(blk->bs); | |
716 | } | |
717 | ||
4be74634 MA |
718 | int blk_flush(BlockBackend *blk) |
719 | { | |
720 | return bdrv_flush(blk->bs); | |
721 | } | |
722 | ||
723 | int blk_flush_all(void) | |
724 | { | |
725 | return bdrv_flush_all(); | |
726 | } | |
727 | ||
97b0385a AY |
728 | void blk_drain(BlockBackend *blk) |
729 | { | |
730 | bdrv_drain(blk->bs); | |
731 | } | |
732 | ||
4be74634 MA |
733 | void blk_drain_all(void) |
734 | { | |
735 | bdrv_drain_all(); | |
736 | } | |
737 | ||
738 | BlockdevOnError blk_get_on_error(BlockBackend *blk, bool is_read) | |
739 | { | |
740 | return bdrv_get_on_error(blk->bs, is_read); | |
741 | } | |
742 | ||
743 | BlockErrorAction blk_get_error_action(BlockBackend *blk, bool is_read, | |
744 | int error) | |
745 | { | |
746 | return bdrv_get_error_action(blk->bs, is_read, error); | |
747 | } | |
748 | ||
749 | void blk_error_action(BlockBackend *blk, BlockErrorAction action, | |
750 | bool is_read, int error) | |
751 | { | |
752 | bdrv_error_action(blk->bs, action, is_read, error); | |
753 | } | |
754 | ||
755 | int blk_is_read_only(BlockBackend *blk) | |
756 | { | |
757 | return bdrv_is_read_only(blk->bs); | |
758 | } | |
759 | ||
760 | int blk_is_sg(BlockBackend *blk) | |
761 | { | |
762 | return bdrv_is_sg(blk->bs); | |
763 | } | |
764 | ||
765 | int blk_enable_write_cache(BlockBackend *blk) | |
766 | { | |
767 | return bdrv_enable_write_cache(blk->bs); | |
768 | } | |
769 | ||
770 | void blk_set_enable_write_cache(BlockBackend *blk, bool wce) | |
771 | { | |
772 | bdrv_set_enable_write_cache(blk->bs, wce); | |
773 | } | |
774 | ||
2bb0dce7 HR |
775 | void blk_invalidate_cache(BlockBackend *blk, Error **errp) |
776 | { | |
777 | bdrv_invalidate_cache(blk->bs, errp); | |
778 | } | |
779 | ||
e031f750 | 780 | bool blk_is_inserted(BlockBackend *blk) |
4be74634 | 781 | { |
db0284f8 HR |
782 | return blk->bs && bdrv_is_inserted(blk->bs); |
783 | } | |
784 | ||
785 | bool blk_is_available(BlockBackend *blk) | |
786 | { | |
787 | return blk_is_inserted(blk) && !blk_dev_is_tray_open(blk); | |
4be74634 MA |
788 | } |
789 | ||
790 | void blk_lock_medium(BlockBackend *blk, bool locked) | |
791 | { | |
792 | bdrv_lock_medium(blk->bs, locked); | |
793 | } | |
794 | ||
795 | void blk_eject(BlockBackend *blk, bool eject_flag) | |
796 | { | |
797 | bdrv_eject(blk->bs, eject_flag); | |
798 | } | |
799 | ||
800 | int blk_get_flags(BlockBackend *blk) | |
801 | { | |
802 | return bdrv_get_flags(blk->bs); | |
803 | } | |
804 | ||
454057b7 PL |
805 | int blk_get_max_transfer_length(BlockBackend *blk) |
806 | { | |
807 | return blk->bs->bl.max_transfer_length; | |
808 | } | |
809 | ||
4be74634 MA |
810 | void blk_set_guest_block_size(BlockBackend *blk, int align) |
811 | { | |
68e9ec01 | 812 | blk->guest_block_size = align; |
4be74634 MA |
813 | } |
814 | ||
815 | void *blk_blockalign(BlockBackend *blk, size_t size) | |
816 | { | |
817 | return qemu_blockalign(blk ? blk->bs : NULL, size); | |
818 | } | |
819 | ||
820 | bool blk_op_is_blocked(BlockBackend *blk, BlockOpType op, Error **errp) | |
821 | { | |
822 | return bdrv_op_is_blocked(blk->bs, op, errp); | |
823 | } | |
824 | ||
825 | void blk_op_unblock(BlockBackend *blk, BlockOpType op, Error *reason) | |
826 | { | |
827 | bdrv_op_unblock(blk->bs, op, reason); | |
828 | } | |
829 | ||
830 | void blk_op_block_all(BlockBackend *blk, Error *reason) | |
831 | { | |
832 | bdrv_op_block_all(blk->bs, reason); | |
833 | } | |
834 | ||
835 | void blk_op_unblock_all(BlockBackend *blk, Error *reason) | |
836 | { | |
837 | bdrv_op_unblock_all(blk->bs, reason); | |
838 | } | |
839 | ||
840 | AioContext *blk_get_aio_context(BlockBackend *blk) | |
841 | { | |
4981bdec HR |
842 | if (blk->bs) { |
843 | return bdrv_get_aio_context(blk->bs); | |
844 | } else { | |
845 | return qemu_get_aio_context(); | |
846 | } | |
847 | } | |
848 | ||
849 | static AioContext *blk_aiocb_get_aio_context(BlockAIOCB *acb) | |
850 | { | |
851 | BlockBackendAIOCB *blk_acb = DO_UPCAST(BlockBackendAIOCB, common, acb); | |
852 | return blk_get_aio_context(blk_acb->blk); | |
4be74634 MA |
853 | } |
854 | ||
855 | void blk_set_aio_context(BlockBackend *blk, AioContext *new_context) | |
856 | { | |
857 | bdrv_set_aio_context(blk->bs, new_context); | |
858 | } | |
859 | ||
2019ba0a HR |
860 | void blk_add_aio_context_notifier(BlockBackend *blk, |
861 | void (*attached_aio_context)(AioContext *new_context, void *opaque), | |
862 | void (*detach_aio_context)(void *opaque), void *opaque) | |
863 | { | |
864 | bdrv_add_aio_context_notifier(blk->bs, attached_aio_context, | |
865 | detach_aio_context, opaque); | |
866 | } | |
867 | ||
868 | void blk_remove_aio_context_notifier(BlockBackend *blk, | |
869 | void (*attached_aio_context)(AioContext *, | |
870 | void *), | |
871 | void (*detach_aio_context)(void *), | |
872 | void *opaque) | |
873 | { | |
874 | bdrv_remove_aio_context_notifier(blk->bs, attached_aio_context, | |
875 | detach_aio_context, opaque); | |
876 | } | |
877 | ||
2c28b21f HR |
878 | void blk_add_close_notifier(BlockBackend *blk, Notifier *notify) |
879 | { | |
880 | bdrv_add_close_notifier(blk->bs, notify); | |
881 | } | |
882 | ||
4be74634 MA |
883 | void blk_io_plug(BlockBackend *blk) |
884 | { | |
885 | bdrv_io_plug(blk->bs); | |
886 | } | |
887 | ||
888 | void blk_io_unplug(BlockBackend *blk) | |
889 | { | |
890 | bdrv_io_unplug(blk->bs); | |
891 | } | |
892 | ||
893 | BlockAcctStats *blk_get_stats(BlockBackend *blk) | |
894 | { | |
895 | return bdrv_get_stats(blk->bs); | |
896 | } | |
897 | ||
898 | void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk, | |
899 | BlockCompletionFunc *cb, void *opaque) | |
900 | { | |
901 | return qemu_aio_get(aiocb_info, blk_bs(blk), cb, opaque); | |
902 | } | |
1ef01253 HR |
903 | |
904 | int coroutine_fn blk_co_write_zeroes(BlockBackend *blk, int64_t sector_num, | |
905 | int nb_sectors, BdrvRequestFlags flags) | |
906 | { | |
e7f7d676 HR |
907 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
908 | if (ret < 0) { | |
909 | return ret; | |
910 | } | |
911 | ||
1ef01253 HR |
912 | return bdrv_co_write_zeroes(blk->bs, sector_num, nb_sectors, flags); |
913 | } | |
914 | ||
915 | int blk_write_compressed(BlockBackend *blk, int64_t sector_num, | |
916 | const uint8_t *buf, int nb_sectors) | |
917 | { | |
e7f7d676 HR |
918 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
919 | if (ret < 0) { | |
920 | return ret; | |
921 | } | |
922 | ||
1ef01253 HR |
923 | return bdrv_write_compressed(blk->bs, sector_num, buf, nb_sectors); |
924 | } | |
925 | ||
926 | int blk_truncate(BlockBackend *blk, int64_t offset) | |
927 | { | |
928 | return bdrv_truncate(blk->bs, offset); | |
929 | } | |
930 | ||
931 | int blk_discard(BlockBackend *blk, int64_t sector_num, int nb_sectors) | |
932 | { | |
e7f7d676 HR |
933 | int ret = blk_check_request(blk, sector_num, nb_sectors); |
934 | if (ret < 0) { | |
935 | return ret; | |
936 | } | |
937 | ||
1ef01253 HR |
938 | return bdrv_discard(blk->bs, sector_num, nb_sectors); |
939 | } | |
940 | ||
941 | int blk_save_vmstate(BlockBackend *blk, const uint8_t *buf, | |
942 | int64_t pos, int size) | |
943 | { | |
944 | return bdrv_save_vmstate(blk->bs, buf, pos, size); | |
945 | } | |
946 | ||
947 | int blk_load_vmstate(BlockBackend *blk, uint8_t *buf, int64_t pos, int size) | |
948 | { | |
949 | return bdrv_load_vmstate(blk->bs, buf, pos, size); | |
950 | } | |
f0272c4d ET |
951 | |
952 | int blk_probe_blocksizes(BlockBackend *blk, BlockSizes *bsz) | |
953 | { | |
954 | return bdrv_probe_blocksizes(blk->bs, bsz); | |
955 | } | |
956 | ||
957 | int blk_probe_geometry(BlockBackend *blk, HDGeometry *geo) | |
958 | { | |
959 | return bdrv_probe_geometry(blk->bs, geo); | |
960 | } |