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15#include "qemu/osdep.h"
16#include "block/qdict.h"
17#include "qapi/error.h"
18#include "qemu/timer.h"
19#include "qemu/bswap.h"
20#include "qemu/main-loop.h"
21#include "qemu/module.h"
22#include "qemu/option.h"
23#include "trace.h"
24#include "qed.h"
25#include "sysemu/block-backend.h"
26#include "qapi/qmp/qdict.h"
27#include "qapi/qobject-input-visitor.h"
28#include "qapi/qapi-visit-block-core.h"
29
30static QemuOptsList qed_create_opts;
31
32static int bdrv_qed_probe(const uint8_t *buf, int buf_size,
33 const char *filename)
34{
35 const QEDHeader *header = (const QEDHeader *)buf;
36
37 if (buf_size < sizeof(*header)) {
38 return 0;
39 }
40 if (le32_to_cpu(header->magic) != QED_MAGIC) {
41 return 0;
42 }
43 return 100;
44}
45
46
47
48
49
50
51static bool qed_fmt_is_raw(const char *fmt)
52{
53 return fmt && strcmp(fmt, "raw") == 0;
54}
55
56static void qed_header_le_to_cpu(const QEDHeader *le, QEDHeader *cpu)
57{
58 cpu->magic = le32_to_cpu(le->magic);
59 cpu->cluster_size = le32_to_cpu(le->cluster_size);
60 cpu->table_size = le32_to_cpu(le->table_size);
61 cpu->header_size = le32_to_cpu(le->header_size);
62 cpu->features = le64_to_cpu(le->features);
63 cpu->compat_features = le64_to_cpu(le->compat_features);
64 cpu->autoclear_features = le64_to_cpu(le->autoclear_features);
65 cpu->l1_table_offset = le64_to_cpu(le->l1_table_offset);
66 cpu->image_size = le64_to_cpu(le->image_size);
67 cpu->backing_filename_offset = le32_to_cpu(le->backing_filename_offset);
68 cpu->backing_filename_size = le32_to_cpu(le->backing_filename_size);
69}
70
71static void qed_header_cpu_to_le(const QEDHeader *cpu, QEDHeader *le)
72{
73 le->magic = cpu_to_le32(cpu->magic);
74 le->cluster_size = cpu_to_le32(cpu->cluster_size);
75 le->table_size = cpu_to_le32(cpu->table_size);
76 le->header_size = cpu_to_le32(cpu->header_size);
77 le->features = cpu_to_le64(cpu->features);
78 le->compat_features = cpu_to_le64(cpu->compat_features);
79 le->autoclear_features = cpu_to_le64(cpu->autoclear_features);
80 le->l1_table_offset = cpu_to_le64(cpu->l1_table_offset);
81 le->image_size = cpu_to_le64(cpu->image_size);
82 le->backing_filename_offset = cpu_to_le32(cpu->backing_filename_offset);
83 le->backing_filename_size = cpu_to_le32(cpu->backing_filename_size);
84}
85
86int qed_write_header_sync(BDRVQEDState *s)
87{
88 QEDHeader le;
89 int ret;
90
91 qed_header_cpu_to_le(&s->header, &le);
92 ret = bdrv_pwrite(s->bs->file, 0, &le, sizeof(le));
93 if (ret != sizeof(le)) {
94 return ret;
95 }
96 return 0;
97}
98
99
100
101
102
103
104
105
106
107static int coroutine_fn qed_write_header(BDRVQEDState *s)
108{
109
110
111
112
113
114
115 int nsectors = DIV_ROUND_UP(sizeof(QEDHeader), BDRV_SECTOR_SIZE);
116 size_t len = nsectors * BDRV_SECTOR_SIZE;
117 uint8_t *buf;
118 int ret;
119
120 assert(s->allocating_acb || s->allocating_write_reqs_plugged);
121
122 buf = qemu_blockalign(s->bs, len);
123
124 ret = bdrv_co_pread(s->bs->file, 0, len, buf, 0);
125 if (ret < 0) {
126 goto out;
127 }
128
129
130 qed_header_cpu_to_le(&s->header, (QEDHeader *) buf);
131
132 ret = bdrv_co_pwrite(s->bs->file, 0, len, buf, 0);
133 if (ret < 0) {
134 goto out;
135 }
136
137 ret = 0;
138out:
139 qemu_vfree(buf);
140 return ret;
141}
142
143static uint64_t qed_max_image_size(uint32_t cluster_size, uint32_t table_size)
144{
145 uint64_t table_entries;
146 uint64_t l2_size;
147
148 table_entries = (table_size * cluster_size) / sizeof(uint64_t);
149 l2_size = table_entries * cluster_size;
150
151 return l2_size * table_entries;
152}
153
154static bool qed_is_cluster_size_valid(uint32_t cluster_size)
155{
156 if (cluster_size < QED_MIN_CLUSTER_SIZE ||
157 cluster_size > QED_MAX_CLUSTER_SIZE) {
158 return false;
159 }
160 if (cluster_size & (cluster_size - 1)) {
161 return false;
162 }
163 return true;
164}
165
166static bool qed_is_table_size_valid(uint32_t table_size)
167{
168 if (table_size < QED_MIN_TABLE_SIZE ||
169 table_size > QED_MAX_TABLE_SIZE) {
170 return false;
171 }
172 if (table_size & (table_size - 1)) {
173 return false;
174 }
175 return true;
176}
177
178static bool qed_is_image_size_valid(uint64_t image_size, uint32_t cluster_size,
179 uint32_t table_size)
180{
181 if (image_size % BDRV_SECTOR_SIZE != 0) {
182 return false;
183 }
184 if (image_size > qed_max_image_size(cluster_size, table_size)) {
185 return false;
186 }
187 return true;
188}
189
190
191
192
193
194
195
196
197
198
199
200
201
202static int qed_read_string(BdrvChild *file, uint64_t offset, size_t n,
203 char *buf, size_t buflen)
204{
205 int ret;
206 if (n >= buflen) {
207 return -EINVAL;
208 }
209 ret = bdrv_pread(file, offset, buf, n);
210 if (ret < 0) {
211 return ret;
212 }
213 buf[n] = '\0';
214 return 0;
215}
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230static uint64_t qed_alloc_clusters(BDRVQEDState *s, unsigned int n)
231{
232 uint64_t offset = s->file_size;
233 s->file_size += n * s->header.cluster_size;
234 return offset;
235}
236
237QEDTable *qed_alloc_table(BDRVQEDState *s)
238{
239
240 return qemu_blockalign(s->bs,
241 s->header.cluster_size * s->header.table_size);
242}
243
244
245
246
247
248
249static CachedL2Table *qed_new_l2_table(BDRVQEDState *s)
250{
251 CachedL2Table *l2_table = qed_alloc_l2_cache_entry(&s->l2_cache);
252
253 l2_table->table = qed_alloc_table(s);
254 l2_table->offset = qed_alloc_clusters(s, s->header.table_size);
255
256 memset(l2_table->table->offsets, 0,
257 s->header.cluster_size * s->header.table_size);
258 return l2_table;
259}
260
261static bool qed_plug_allocating_write_reqs(BDRVQEDState *s)
262{
263 qemu_co_mutex_lock(&s->table_lock);
264
265
266 assert(!s->allocating_write_reqs_plugged);
267 if (s->allocating_acb != NULL) {
268
269
270
271 qemu_co_mutex_unlock(&s->table_lock);
272 return false;
273 }
274
275 s->allocating_write_reqs_plugged = true;
276 qemu_co_mutex_unlock(&s->table_lock);
277 return true;
278}
279
280static void qed_unplug_allocating_write_reqs(BDRVQEDState *s)
281{
282 qemu_co_mutex_lock(&s->table_lock);
283 assert(s->allocating_write_reqs_plugged);
284 s->allocating_write_reqs_plugged = false;
285 qemu_co_queue_next(&s->allocating_write_reqs);
286 qemu_co_mutex_unlock(&s->table_lock);
287}
288
289static void coroutine_fn qed_need_check_timer_entry(void *opaque)
290{
291 BDRVQEDState *s = opaque;
292 int ret;
293
294 trace_qed_need_check_timer_cb(s);
295
296 if (!qed_plug_allocating_write_reqs(s)) {
297 return;
298 }
299
300
301 ret = bdrv_co_flush(s->bs->file->bs);
302 if (ret < 0) {
303 qed_unplug_allocating_write_reqs(s);
304 return;
305 }
306
307 s->header.features &= ~QED_F_NEED_CHECK;
308 ret = qed_write_header(s);
309 (void) ret;
310
311 qed_unplug_allocating_write_reqs(s);
312
313 ret = bdrv_co_flush(s->bs);
314 (void) ret;
315}
316
317static void qed_need_check_timer_cb(void *opaque)
318{
319 Coroutine *co = qemu_coroutine_create(qed_need_check_timer_entry, opaque);
320 qemu_coroutine_enter(co);
321}
322
323static void qed_start_need_check_timer(BDRVQEDState *s)
324{
325 trace_qed_start_need_check_timer(s);
326
327
328
329
330 timer_mod(s->need_check_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
331 NANOSECONDS_PER_SECOND * QED_NEED_CHECK_TIMEOUT);
332}
333
334
335static void qed_cancel_need_check_timer(BDRVQEDState *s)
336{
337 trace_qed_cancel_need_check_timer(s);
338 timer_del(s->need_check_timer);
339}
340
341static void bdrv_qed_detach_aio_context(BlockDriverState *bs)
342{
343 BDRVQEDState *s = bs->opaque;
344
345 qed_cancel_need_check_timer(s);
346 timer_free(s->need_check_timer);
347}
348
349static void bdrv_qed_attach_aio_context(BlockDriverState *bs,
350 AioContext *new_context)
351{
352 BDRVQEDState *s = bs->opaque;
353
354 s->need_check_timer = aio_timer_new(new_context,
355 QEMU_CLOCK_VIRTUAL, SCALE_NS,
356 qed_need_check_timer_cb, s);
357 if (s->header.features & QED_F_NEED_CHECK) {
358 qed_start_need_check_timer(s);
359 }
360}
361
362static void coroutine_fn bdrv_qed_co_drain_begin(BlockDriverState *bs)
363{
364 BDRVQEDState *s = bs->opaque;
365
366
367
368
369 if (s->need_check_timer && timer_pending(s->need_check_timer)) {
370 qed_cancel_need_check_timer(s);
371 qed_need_check_timer_entry(s);
372 }
373}
374
375static void bdrv_qed_init_state(BlockDriverState *bs)
376{
377 BDRVQEDState *s = bs->opaque;
378
379 memset(s, 0, sizeof(BDRVQEDState));
380 s->bs = bs;
381 qemu_co_mutex_init(&s->table_lock);
382 qemu_co_queue_init(&s->allocating_write_reqs);
383}
384
385
386static int coroutine_fn bdrv_qed_do_open(BlockDriverState *bs, QDict *options,
387 int flags, Error **errp)
388{
389 BDRVQEDState *s = bs->opaque;
390 QEDHeader le_header;
391 int64_t file_size;
392 int ret;
393
394 ret = bdrv_pread(bs->file, 0, &le_header, sizeof(le_header));
395 if (ret < 0) {
396 error_setg(errp, "Failed to read QED header");
397 return ret;
398 }
399 qed_header_le_to_cpu(&le_header, &s->header);
400
401 if (s->header.magic != QED_MAGIC) {
402 error_setg(errp, "Image not in QED format");
403 return -EINVAL;
404 }
405 if (s->header.features & ~QED_FEATURE_MASK) {
406
407 error_setg(errp, "Unsupported QED features: %" PRIx64,
408 s->header.features & ~QED_FEATURE_MASK);
409 return -ENOTSUP;
410 }
411 if (!qed_is_cluster_size_valid(s->header.cluster_size)) {
412 error_setg(errp, "QED cluster size is invalid");
413 return -EINVAL;
414 }
415
416
417 file_size = bdrv_getlength(bs->file->bs);
418 if (file_size < 0) {
419 error_setg(errp, "Failed to get file length");
420 return file_size;
421 }
422 s->file_size = qed_start_of_cluster(s, file_size);
423
424 if (!qed_is_table_size_valid(s->header.table_size)) {
425 error_setg(errp, "QED table size is invalid");
426 return -EINVAL;
427 }
428 if (!qed_is_image_size_valid(s->header.image_size,
429 s->header.cluster_size,
430 s->header.table_size)) {
431 error_setg(errp, "QED image size is invalid");
432 return -EINVAL;
433 }
434 if (!qed_check_table_offset(s, s->header.l1_table_offset)) {
435 error_setg(errp, "QED table offset is invalid");
436 return -EINVAL;
437 }
438
439 s->table_nelems = (s->header.cluster_size * s->header.table_size) /
440 sizeof(uint64_t);
441 s->l2_shift = ctz32(s->header.cluster_size);
442 s->l2_mask = s->table_nelems - 1;
443 s->l1_shift = s->l2_shift + ctz32(s->table_nelems);
444
445
446 if (s->header.header_size > UINT32_MAX / s->header.cluster_size) {
447 error_setg(errp, "QED header size is too large");
448 return -EINVAL;
449 }
450
451 if ((s->header.features & QED_F_BACKING_FILE)) {
452 if ((uint64_t)s->header.backing_filename_offset +
453 s->header.backing_filename_size >
454 s->header.cluster_size * s->header.header_size) {
455 error_setg(errp, "QED backing filename offset is invalid");
456 return -EINVAL;
457 }
458
459 ret = qed_read_string(bs->file, s->header.backing_filename_offset,
460 s->header.backing_filename_size,
461 bs->auto_backing_file,
462 sizeof(bs->auto_backing_file));
463 if (ret < 0) {
464 error_setg(errp, "Failed to read backing filename");
465 return ret;
466 }
467 pstrcpy(bs->backing_file, sizeof(bs->backing_file),
468 bs->auto_backing_file);
469
470 if (s->header.features & QED_F_BACKING_FORMAT_NO_PROBE) {
471 pstrcpy(bs->backing_format, sizeof(bs->backing_format), "raw");
472 }
473 }
474
475
476
477
478
479
480
481 if ((s->header.autoclear_features & ~QED_AUTOCLEAR_FEATURE_MASK) != 0 &&
482 !bdrv_is_read_only(bs->file->bs) && !(flags & BDRV_O_INACTIVE)) {
483 s->header.autoclear_features &= QED_AUTOCLEAR_FEATURE_MASK;
484
485 ret = qed_write_header_sync(s);
486 if (ret) {
487 error_setg(errp, "Failed to update header");
488 return ret;
489 }
490
491
492 bdrv_flush(bs->file->bs);
493 }
494
495 s->l1_table = qed_alloc_table(s);
496 qed_init_l2_cache(&s->l2_cache);
497
498 ret = qed_read_l1_table_sync(s);
499 if (ret) {
500 error_setg(errp, "Failed to read L1 table");
501 goto out;
502 }
503
504
505 if (!(flags & BDRV_O_CHECK) && (s->header.features & QED_F_NEED_CHECK)) {
506
507
508
509
510
511 if (!bdrv_is_read_only(bs->file->bs) &&
512 !(flags & BDRV_O_INACTIVE)) {
513 BdrvCheckResult result = {0};
514
515 ret = qed_check(s, &result, true);
516 if (ret) {
517 error_setg(errp, "Image corrupted");
518 goto out;
519 }
520 }
521 }
522
523 bdrv_qed_attach_aio_context(bs, bdrv_get_aio_context(bs));
524
525out:
526 if (ret) {
527 qed_free_l2_cache(&s->l2_cache);
528 qemu_vfree(s->l1_table);
529 }
530 return ret;
531}
532
533typedef struct QEDOpenCo {
534 BlockDriverState *bs;
535 QDict *options;
536 int flags;
537 Error **errp;
538 int ret;
539} QEDOpenCo;
540
541static void coroutine_fn bdrv_qed_open_entry(void *opaque)
542{
543 QEDOpenCo *qoc = opaque;
544 BDRVQEDState *s = qoc->bs->opaque;
545
546 qemu_co_mutex_lock(&s->table_lock);
547 qoc->ret = bdrv_qed_do_open(qoc->bs, qoc->options, qoc->flags, qoc->errp);
548 qemu_co_mutex_unlock(&s->table_lock);
549}
550
551static int bdrv_qed_open(BlockDriverState *bs, QDict *options, int flags,
552 Error **errp)
553{
554 QEDOpenCo qoc = {
555 .bs = bs,
556 .options = options,
557 .flags = flags,
558 .errp = errp,
559 .ret = -EINPROGRESS
560 };
561
562 bs->file = bdrv_open_child(NULL, options, "file", bs, &child_of_bds,
563 BDRV_CHILD_IMAGE, false, errp);
564 if (!bs->file) {
565 return -EINVAL;
566 }
567
568 bdrv_qed_init_state(bs);
569 if (qemu_in_coroutine()) {
570 bdrv_qed_open_entry(&qoc);
571 } else {
572 assert(qemu_get_current_aio_context() == qemu_get_aio_context());
573 qemu_coroutine_enter(qemu_coroutine_create(bdrv_qed_open_entry, &qoc));
574 BDRV_POLL_WHILE(bs, qoc.ret == -EINPROGRESS);
575 }
576 BDRV_POLL_WHILE(bs, qoc.ret == -EINPROGRESS);
577 return qoc.ret;
578}
579
580static void bdrv_qed_refresh_limits(BlockDriverState *bs, Error **errp)
581{
582 BDRVQEDState *s = bs->opaque;
583
584 bs->bl.pwrite_zeroes_alignment = s->header.cluster_size;
585}
586
587
588
589static int bdrv_qed_reopen_prepare(BDRVReopenState *state,
590 BlockReopenQueue *queue, Error **errp)
591{
592 return 0;
593}
594
595static void bdrv_qed_close(BlockDriverState *bs)
596{
597 BDRVQEDState *s = bs->opaque;
598
599 bdrv_qed_detach_aio_context(bs);
600
601
602 bdrv_flush(bs->file->bs);
603
604
605 if (s->header.features & QED_F_NEED_CHECK) {
606 s->header.features &= ~QED_F_NEED_CHECK;
607 qed_write_header_sync(s);
608 }
609
610 qed_free_l2_cache(&s->l2_cache);
611 qemu_vfree(s->l1_table);
612}
613
614static int coroutine_fn bdrv_qed_co_create(BlockdevCreateOptions *opts,
615 Error **errp)
616{
617 BlockdevCreateOptionsQed *qed_opts;
618 BlockBackend *blk = NULL;
619 BlockDriverState *bs = NULL;
620
621 QEDHeader header;
622 QEDHeader le_header;
623 uint8_t *l1_table = NULL;
624 size_t l1_size;
625 int ret = 0;
626
627 assert(opts->driver == BLOCKDEV_DRIVER_QED);
628 qed_opts = &opts->u.qed;
629
630
631 if (!qed_opts->has_cluster_size) {
632 qed_opts->cluster_size = QED_DEFAULT_CLUSTER_SIZE;
633 }
634 if (!qed_opts->has_table_size) {
635 qed_opts->table_size = QED_DEFAULT_TABLE_SIZE;
636 }
637
638 if (!qed_is_cluster_size_valid(qed_opts->cluster_size)) {
639 error_setg(errp, "QED cluster size must be within range [%u, %u] "
640 "and power of 2",
641 QED_MIN_CLUSTER_SIZE, QED_MAX_CLUSTER_SIZE);
642 return -EINVAL;
643 }
644 if (!qed_is_table_size_valid(qed_opts->table_size)) {
645 error_setg(errp, "QED table size must be within range [%u, %u] "
646 "and power of 2",
647 QED_MIN_TABLE_SIZE, QED_MAX_TABLE_SIZE);
648 return -EINVAL;
649 }
650 if (!qed_is_image_size_valid(qed_opts->size, qed_opts->cluster_size,
651 qed_opts->table_size))
652 {
653 error_setg(errp, "QED image size must be a non-zero multiple of "
654 "cluster size and less than %" PRIu64 " bytes",
655 qed_max_image_size(qed_opts->cluster_size,
656 qed_opts->table_size));
657 return -EINVAL;
658 }
659
660
661 bs = bdrv_open_blockdev_ref(qed_opts->file, errp);
662 if (bs == NULL) {
663 return -EIO;
664 }
665
666 blk = blk_new_with_bs(bs, BLK_PERM_WRITE | BLK_PERM_RESIZE, BLK_PERM_ALL,
667 errp);
668 if (!blk) {
669 ret = -EPERM;
670 goto out;
671 }
672 blk_set_allow_write_beyond_eof(blk, true);
673
674
675 header = (QEDHeader) {
676 .magic = QED_MAGIC,
677 .cluster_size = qed_opts->cluster_size,
678 .table_size = qed_opts->table_size,
679 .header_size = 1,
680 .features = 0,
681 .compat_features = 0,
682 .l1_table_offset = qed_opts->cluster_size,
683 .image_size = qed_opts->size,
684 };
685
686 l1_size = header.cluster_size * header.table_size;
687
688
689
690
691
692 ret = blk_truncate(blk, 0, true, PREALLOC_MODE_OFF, 0, errp);
693 if (ret < 0) {
694 goto out;
695 }
696
697 if (qed_opts->has_backing_file) {
698 header.features |= QED_F_BACKING_FILE;
699 header.backing_filename_offset = sizeof(le_header);
700 header.backing_filename_size = strlen(qed_opts->backing_file);
701
702 if (qed_opts->has_backing_fmt) {
703 const char *backing_fmt = BlockdevDriver_str(qed_opts->backing_fmt);
704 if (qed_fmt_is_raw(backing_fmt)) {
705 header.features |= QED_F_BACKING_FORMAT_NO_PROBE;
706 }
707 }
708 }
709
710 qed_header_cpu_to_le(&header, &le_header);
711 ret = blk_pwrite(blk, 0, &le_header, sizeof(le_header), 0);
712 if (ret < 0) {
713 goto out;
714 }
715 ret = blk_pwrite(blk, sizeof(le_header), qed_opts->backing_file,
716 header.backing_filename_size, 0);
717 if (ret < 0) {
718 goto out;
719 }
720
721 l1_table = g_malloc0(l1_size);
722 ret = blk_pwrite(blk, header.l1_table_offset, l1_table, l1_size, 0);
723 if (ret < 0) {
724 goto out;
725 }
726
727 ret = 0;
728out:
729 g_free(l1_table);
730 blk_unref(blk);
731 bdrv_unref(bs);
732 return ret;
733}
734
735static int coroutine_fn bdrv_qed_co_create_opts(BlockDriver *drv,
736 const char *filename,
737 QemuOpts *opts,
738 Error **errp)
739{
740 BlockdevCreateOptions *create_options = NULL;
741 QDict *qdict;
742 Visitor *v;
743 BlockDriverState *bs = NULL;
744 int ret;
745
746 static const QDictRenames opt_renames[] = {
747 { BLOCK_OPT_BACKING_FILE, "backing-file" },
748 { BLOCK_OPT_BACKING_FMT, "backing-fmt" },
749 { BLOCK_OPT_CLUSTER_SIZE, "cluster-size" },
750 { BLOCK_OPT_TABLE_SIZE, "table-size" },
751 { NULL, NULL },
752 };
753
754
755 qdict = qemu_opts_to_qdict_filtered(opts, NULL, &qed_create_opts, true);
756
757 if (!qdict_rename_keys(qdict, opt_renames, errp)) {
758 ret = -EINVAL;
759 goto fail;
760 }
761
762
763 ret = bdrv_create_file(filename, opts, errp);
764 if (ret < 0) {
765 goto fail;
766 }
767
768 bs = bdrv_open(filename, NULL, NULL,
769 BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL, errp);
770 if (bs == NULL) {
771 ret = -EIO;
772 goto fail;
773 }
774
775
776 qdict_put_str(qdict, "driver", "qed");
777 qdict_put_str(qdict, "file", bs->node_name);
778
779 v = qobject_input_visitor_new_flat_confused(qdict, errp);
780 if (!v) {
781 ret = -EINVAL;
782 goto fail;
783 }
784
785 visit_type_BlockdevCreateOptions(v, NULL, &create_options, errp);
786 visit_free(v);
787 if (!create_options) {
788 ret = -EINVAL;
789 goto fail;
790 }
791
792
793 assert(create_options->driver == BLOCKDEV_DRIVER_QED);
794 create_options->u.qed.size =
795 ROUND_UP(create_options->u.qed.size, BDRV_SECTOR_SIZE);
796
797
798 ret = bdrv_qed_co_create(create_options, errp);
799
800fail:
801 qobject_unref(qdict);
802 bdrv_unref(bs);
803 qapi_free_BlockdevCreateOptions(create_options);
804 return ret;
805}
806
807static int coroutine_fn bdrv_qed_co_block_status(BlockDriverState *bs,
808 bool want_zero,
809 int64_t pos, int64_t bytes,
810 int64_t *pnum, int64_t *map,
811 BlockDriverState **file)
812{
813 BDRVQEDState *s = bs->opaque;
814 size_t len = MIN(bytes, SIZE_MAX);
815 int status;
816 QEDRequest request = { .l2_table = NULL };
817 uint64_t offset;
818 int ret;
819
820 qemu_co_mutex_lock(&s->table_lock);
821 ret = qed_find_cluster(s, &request, pos, &len, &offset);
822
823 *pnum = len;
824 switch (ret) {
825 case QED_CLUSTER_FOUND:
826 *map = offset | qed_offset_into_cluster(s, pos);
827 status = BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID;
828 *file = bs->file->bs;
829 break;
830 case QED_CLUSTER_ZERO:
831 status = BDRV_BLOCK_ZERO;
832 break;
833 case QED_CLUSTER_L2:
834 case QED_CLUSTER_L1:
835 status = 0;
836 break;
837 default:
838 assert(ret < 0);
839 status = ret;
840 break;
841 }
842
843 qed_unref_l2_cache_entry(request.l2_table);
844 qemu_co_mutex_unlock(&s->table_lock);
845
846 return status;
847}
848
849static BDRVQEDState *acb_to_s(QEDAIOCB *acb)
850{
851 return acb->bs->opaque;
852}
853
854
855
856
857
858
859
860
861
862
863
864static int coroutine_fn qed_read_backing_file(BDRVQEDState *s, uint64_t pos,
865 QEMUIOVector *qiov)
866{
867 if (s->bs->backing) {
868 BLKDBG_EVENT(s->bs->file, BLKDBG_READ_BACKING_AIO);
869 return bdrv_co_preadv(s->bs->backing, pos, qiov->size, qiov, 0);
870 }
871 qemu_iovec_memset(qiov, 0, 0, qiov->size);
872 return 0;
873}
874
875
876
877
878
879
880
881
882
883static int coroutine_fn qed_copy_from_backing_file(BDRVQEDState *s,
884 uint64_t pos, uint64_t len,
885 uint64_t offset)
886{
887 QEMUIOVector qiov;
888 int ret;
889
890
891 if (len == 0) {
892 return 0;
893 }
894
895 qemu_iovec_init_buf(&qiov, qemu_blockalign(s->bs, len), len);
896
897 ret = qed_read_backing_file(s, pos, &qiov);
898
899 if (ret) {
900 goto out;
901 }
902
903 BLKDBG_EVENT(s->bs->file, BLKDBG_COW_WRITE);
904 ret = bdrv_co_pwritev(s->bs->file, offset, qiov.size, &qiov, 0);
905 if (ret < 0) {
906 goto out;
907 }
908 ret = 0;
909out:
910 qemu_vfree(qemu_iovec_buf(&qiov));
911 return ret;
912}
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928static void coroutine_fn qed_update_l2_table(BDRVQEDState *s, QEDTable *table,
929 int index, unsigned int n,
930 uint64_t cluster)
931{
932 int i;
933 for (i = index; i < index + n; i++) {
934 table->offsets[i] = cluster;
935 if (!qed_offset_is_unalloc_cluster(cluster) &&
936 !qed_offset_is_zero_cluster(cluster)) {
937 cluster += s->header.cluster_size;
938 }
939 }
940}
941
942
943static void coroutine_fn qed_aio_complete(QEDAIOCB *acb)
944{
945 BDRVQEDState *s = acb_to_s(acb);
946
947
948 qemu_iovec_destroy(&acb->cur_qiov);
949 qed_unref_l2_cache_entry(acb->request.l2_table);
950
951
952 if (acb->flags & QED_AIOCB_ZERO) {
953 qemu_vfree(acb->qiov->iov[0].iov_base);
954 acb->qiov->iov[0].iov_base = NULL;
955 }
956
957
958
959
960
961
962
963 if (acb == s->allocating_acb) {
964 s->allocating_acb = NULL;
965 if (!qemu_co_queue_empty(&s->allocating_write_reqs)) {
966 qemu_co_queue_next(&s->allocating_write_reqs);
967 } else if (s->header.features & QED_F_NEED_CHECK) {
968 qed_start_need_check_timer(s);
969 }
970 }
971}
972
973
974
975
976
977
978static int coroutine_fn qed_aio_write_l1_update(QEDAIOCB *acb)
979{
980 BDRVQEDState *s = acb_to_s(acb);
981 CachedL2Table *l2_table = acb->request.l2_table;
982 uint64_t l2_offset = l2_table->offset;
983 int index, ret;
984
985 index = qed_l1_index(s, acb->cur_pos);
986 s->l1_table->offsets[index] = l2_table->offset;
987
988 ret = qed_write_l1_table(s, index, 1);
989
990
991 qed_commit_l2_cache_entry(&s->l2_cache, l2_table);
992
993
994
995
996 acb->request.l2_table = qed_find_l2_cache_entry(&s->l2_cache, l2_offset);
997 assert(acb->request.l2_table != NULL);
998
999 return ret;
1000}
1001
1002
1003
1004
1005
1006
1007
1008static int coroutine_fn qed_aio_write_l2_update(QEDAIOCB *acb, uint64_t offset)
1009{
1010 BDRVQEDState *s = acb_to_s(acb);
1011 bool need_alloc = acb->find_cluster_ret == QED_CLUSTER_L1;
1012 int index, ret;
1013
1014 if (need_alloc) {
1015 qed_unref_l2_cache_entry(acb->request.l2_table);
1016 acb->request.l2_table = qed_new_l2_table(s);
1017 }
1018
1019 index = qed_l2_index(s, acb->cur_pos);
1020 qed_update_l2_table(s, acb->request.l2_table->table, index, acb->cur_nclusters,
1021 offset);
1022
1023 if (need_alloc) {
1024
1025 ret = qed_write_l2_table(s, &acb->request, 0, s->table_nelems, true);
1026 if (ret) {
1027 return ret;
1028 }
1029 return qed_aio_write_l1_update(acb);
1030 } else {
1031
1032 ret = qed_write_l2_table(s, &acb->request, index, acb->cur_nclusters,
1033 false);
1034 if (ret) {
1035 return ret;
1036 }
1037 }
1038 return 0;
1039}
1040
1041
1042
1043
1044
1045
1046static int coroutine_fn qed_aio_write_main(QEDAIOCB *acb)
1047{
1048 BDRVQEDState *s = acb_to_s(acb);
1049 uint64_t offset = acb->cur_cluster +
1050 qed_offset_into_cluster(s, acb->cur_pos);
1051
1052 trace_qed_aio_write_main(s, acb, 0, offset, acb->cur_qiov.size);
1053
1054 BLKDBG_EVENT(s->bs->file, BLKDBG_WRITE_AIO);
1055 return bdrv_co_pwritev(s->bs->file, offset, acb->cur_qiov.size,
1056 &acb->cur_qiov, 0);
1057}
1058
1059
1060
1061
1062
1063
1064static int coroutine_fn qed_aio_write_cow(QEDAIOCB *acb)
1065{
1066 BDRVQEDState *s = acb_to_s(acb);
1067 uint64_t start, len, offset;
1068 int ret;
1069
1070 qemu_co_mutex_unlock(&s->table_lock);
1071
1072
1073 start = qed_start_of_cluster(s, acb->cur_pos);
1074 len = qed_offset_into_cluster(s, acb->cur_pos);
1075
1076 trace_qed_aio_write_prefill(s, acb, start, len, acb->cur_cluster);
1077 ret = qed_copy_from_backing_file(s, start, len, acb->cur_cluster);
1078 if (ret < 0) {
1079 goto out;
1080 }
1081
1082
1083 start = acb->cur_pos + acb->cur_qiov.size;
1084 len = qed_start_of_cluster(s, start + s->header.cluster_size - 1) - start;
1085 offset = acb->cur_cluster +
1086 qed_offset_into_cluster(s, acb->cur_pos) +
1087 acb->cur_qiov.size;
1088
1089 trace_qed_aio_write_postfill(s, acb, start, len, offset);
1090 ret = qed_copy_from_backing_file(s, start, len, offset);
1091 if (ret < 0) {
1092 goto out;
1093 }
1094
1095 ret = qed_aio_write_main(acb);
1096 if (ret < 0) {
1097 goto out;
1098 }
1099
1100 if (s->bs->backing) {
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111 ret = bdrv_co_flush(s->bs->file->bs);
1112 }
1113
1114out:
1115 qemu_co_mutex_lock(&s->table_lock);
1116 return ret;
1117}
1118
1119
1120
1121
1122static bool qed_should_set_need_check(BDRVQEDState *s)
1123{
1124
1125 if (s->bs->backing) {
1126 return false;
1127 }
1128
1129 return !(s->header.features & QED_F_NEED_CHECK);
1130}
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142static int coroutine_fn qed_aio_write_alloc(QEDAIOCB *acb, size_t len)
1143{
1144 BDRVQEDState *s = acb_to_s(acb);
1145 int ret;
1146
1147
1148 if (s->allocating_acb == NULL) {
1149 qed_cancel_need_check_timer(s);
1150 }
1151
1152
1153 if (s->allocating_acb != acb || s->allocating_write_reqs_plugged) {
1154 if (s->allocating_acb != NULL) {
1155 qemu_co_queue_wait(&s->allocating_write_reqs, &s->table_lock);
1156 assert(s->allocating_acb == NULL);
1157 }
1158 s->allocating_acb = acb;
1159 return -EAGAIN;
1160 }
1161
1162 acb->cur_nclusters = qed_bytes_to_clusters(s,
1163 qed_offset_into_cluster(s, acb->cur_pos) + len);
1164 qemu_iovec_concat(&acb->cur_qiov, acb->qiov, acb->qiov_offset, len);
1165
1166 if (acb->flags & QED_AIOCB_ZERO) {
1167
1168 if (acb->find_cluster_ret == QED_CLUSTER_ZERO) {
1169 return 0;
1170 }
1171 acb->cur_cluster = 1;
1172 } else {
1173 acb->cur_cluster = qed_alloc_clusters(s, acb->cur_nclusters);
1174 }
1175
1176 if (qed_should_set_need_check(s)) {
1177 s->header.features |= QED_F_NEED_CHECK;
1178 ret = qed_write_header(s);
1179 if (ret < 0) {
1180 return ret;
1181 }
1182 }
1183
1184 if (!(acb->flags & QED_AIOCB_ZERO)) {
1185 ret = qed_aio_write_cow(acb);
1186 if (ret < 0) {
1187 return ret;
1188 }
1189 }
1190
1191 return qed_aio_write_l2_update(acb, acb->cur_cluster);
1192}
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205static int coroutine_fn qed_aio_write_inplace(QEDAIOCB *acb, uint64_t offset,
1206 size_t len)
1207{
1208 BDRVQEDState *s = acb_to_s(acb);
1209 int r;
1210
1211 qemu_co_mutex_unlock(&s->table_lock);
1212
1213
1214 if (acb->flags & QED_AIOCB_ZERO) {
1215 struct iovec *iov = acb->qiov->iov;
1216
1217 if (!iov->iov_base) {
1218 iov->iov_base = qemu_try_blockalign(acb->bs, iov->iov_len);
1219 if (iov->iov_base == NULL) {
1220 r = -ENOMEM;
1221 goto out;
1222 }
1223 memset(iov->iov_base, 0, iov->iov_len);
1224 }
1225 }
1226
1227
1228 acb->cur_cluster = offset;
1229 qemu_iovec_concat(&acb->cur_qiov, acb->qiov, acb->qiov_offset, len);
1230
1231
1232 r = qed_aio_write_main(acb);
1233out:
1234 qemu_co_mutex_lock(&s->table_lock);
1235 return r;
1236}
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248static int coroutine_fn qed_aio_write_data(void *opaque, int ret,
1249 uint64_t offset, size_t len)
1250{
1251 QEDAIOCB *acb = opaque;
1252
1253 trace_qed_aio_write_data(acb_to_s(acb), acb, ret, offset, len);
1254
1255 acb->find_cluster_ret = ret;
1256
1257 switch (ret) {
1258 case QED_CLUSTER_FOUND:
1259 return qed_aio_write_inplace(acb, offset, len);
1260
1261 case QED_CLUSTER_L2:
1262 case QED_CLUSTER_L1:
1263 case QED_CLUSTER_ZERO:
1264 return qed_aio_write_alloc(acb, len);
1265
1266 default:
1267 g_assert_not_reached();
1268 }
1269}
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281static int coroutine_fn qed_aio_read_data(void *opaque, int ret,
1282 uint64_t offset, size_t len)
1283{
1284 QEDAIOCB *acb = opaque;
1285 BDRVQEDState *s = acb_to_s(acb);
1286 BlockDriverState *bs = acb->bs;
1287 int r;
1288
1289 qemu_co_mutex_unlock(&s->table_lock);
1290
1291
1292 offset += qed_offset_into_cluster(s, acb->cur_pos);
1293
1294 trace_qed_aio_read_data(s, acb, ret, offset, len);
1295
1296 qemu_iovec_concat(&acb->cur_qiov, acb->qiov, acb->qiov_offset, len);
1297
1298
1299
1300
1301 if (ret == QED_CLUSTER_ZERO) {
1302 qemu_iovec_memset(&acb->cur_qiov, 0, 0, acb->cur_qiov.size);
1303 r = 0;
1304 } else if (ret != QED_CLUSTER_FOUND) {
1305 r = qed_read_backing_file(s, acb->cur_pos, &acb->cur_qiov);
1306 } else {
1307 BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO);
1308 r = bdrv_co_preadv(bs->file, offset, acb->cur_qiov.size,
1309 &acb->cur_qiov, 0);
1310 }
1311
1312 qemu_co_mutex_lock(&s->table_lock);
1313 return r;
1314}
1315
1316
1317
1318
1319static int coroutine_fn qed_aio_next_io(QEDAIOCB *acb)
1320{
1321 BDRVQEDState *s = acb_to_s(acb);
1322 uint64_t offset;
1323 size_t len;
1324 int ret;
1325
1326 qemu_co_mutex_lock(&s->table_lock);
1327 while (1) {
1328 trace_qed_aio_next_io(s, acb, 0, acb->cur_pos + acb->cur_qiov.size);
1329
1330 acb->qiov_offset += acb->cur_qiov.size;
1331 acb->cur_pos += acb->cur_qiov.size;
1332 qemu_iovec_reset(&acb->cur_qiov);
1333
1334
1335 if (acb->cur_pos >= acb->end_pos) {
1336 ret = 0;
1337 break;
1338 }
1339
1340
1341 len = acb->end_pos - acb->cur_pos;
1342 ret = qed_find_cluster(s, &acb->request, acb->cur_pos, &len, &offset);
1343 if (ret < 0) {
1344 break;
1345 }
1346
1347 if (acb->flags & QED_AIOCB_WRITE) {
1348 ret = qed_aio_write_data(acb, ret, offset, len);
1349 } else {
1350 ret = qed_aio_read_data(acb, ret, offset, len);
1351 }
1352
1353 if (ret < 0 && ret != -EAGAIN) {
1354 break;
1355 }
1356 }
1357
1358 trace_qed_aio_complete(s, acb, ret);
1359 qed_aio_complete(acb);
1360 qemu_co_mutex_unlock(&s->table_lock);
1361 return ret;
1362}
1363
1364static int coroutine_fn qed_co_request(BlockDriverState *bs, int64_t sector_num,
1365 QEMUIOVector *qiov, int nb_sectors,
1366 int flags)
1367{
1368 QEDAIOCB acb = {
1369 .bs = bs,
1370 .cur_pos = (uint64_t) sector_num * BDRV_SECTOR_SIZE,
1371 .end_pos = (sector_num + nb_sectors) * BDRV_SECTOR_SIZE,
1372 .qiov = qiov,
1373 .flags = flags,
1374 };
1375 qemu_iovec_init(&acb.cur_qiov, qiov->niov);
1376
1377 trace_qed_aio_setup(bs->opaque, &acb, sector_num, nb_sectors, NULL, flags);
1378
1379
1380 return qed_aio_next_io(&acb);
1381}
1382
1383static int coroutine_fn bdrv_qed_co_readv(BlockDriverState *bs,
1384 int64_t sector_num, int nb_sectors,
1385 QEMUIOVector *qiov)
1386{
1387 return qed_co_request(bs, sector_num, qiov, nb_sectors, 0);
1388}
1389
1390static int coroutine_fn bdrv_qed_co_writev(BlockDriverState *bs,
1391 int64_t sector_num, int nb_sectors,
1392 QEMUIOVector *qiov, int flags)
1393{
1394 assert(!flags);
1395 return qed_co_request(bs, sector_num, qiov, nb_sectors, QED_AIOCB_WRITE);
1396}
1397
1398static int coroutine_fn bdrv_qed_co_pwrite_zeroes(BlockDriverState *bs,
1399 int64_t offset,
1400 int bytes,
1401 BdrvRequestFlags flags)
1402{
1403 BDRVQEDState *s = bs->opaque;
1404
1405
1406
1407
1408
1409 QEMUIOVector qiov = QEMU_IOVEC_INIT_BUF(qiov, NULL, bytes);
1410
1411
1412 if (qed_offset_into_cluster(s, offset) ||
1413 qed_offset_into_cluster(s, bytes)) {
1414 return -ENOTSUP;
1415 }
1416
1417 return qed_co_request(bs, offset >> BDRV_SECTOR_BITS, &qiov,
1418 bytes >> BDRV_SECTOR_BITS,
1419 QED_AIOCB_WRITE | QED_AIOCB_ZERO);
1420}
1421
1422static int coroutine_fn bdrv_qed_co_truncate(BlockDriverState *bs,
1423 int64_t offset,
1424 bool exact,
1425 PreallocMode prealloc,
1426 BdrvRequestFlags flags,
1427 Error **errp)
1428{
1429 BDRVQEDState *s = bs->opaque;
1430 uint64_t old_image_size;
1431 int ret;
1432
1433 if (prealloc != PREALLOC_MODE_OFF) {
1434 error_setg(errp, "Unsupported preallocation mode '%s'",
1435 PreallocMode_str(prealloc));
1436 return -ENOTSUP;
1437 }
1438
1439 if (!qed_is_image_size_valid(offset, s->header.cluster_size,
1440 s->header.table_size)) {
1441 error_setg(errp, "Invalid image size specified");
1442 return -EINVAL;
1443 }
1444
1445 if ((uint64_t)offset < s->header.image_size) {
1446 error_setg(errp, "Shrinking images is currently not supported");
1447 return -ENOTSUP;
1448 }
1449
1450 old_image_size = s->header.image_size;
1451 s->header.image_size = offset;
1452 ret = qed_write_header_sync(s);
1453 if (ret < 0) {
1454 s->header.image_size = old_image_size;
1455 error_setg_errno(errp, -ret, "Failed to update the image size");
1456 }
1457 return ret;
1458}
1459
1460static int64_t bdrv_qed_getlength(BlockDriverState *bs)
1461{
1462 BDRVQEDState *s = bs->opaque;
1463 return s->header.image_size;
1464}
1465
1466static int bdrv_qed_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
1467{
1468 BDRVQEDState *s = bs->opaque;
1469
1470 memset(bdi, 0, sizeof(*bdi));
1471 bdi->cluster_size = s->header.cluster_size;
1472 bdi->is_dirty = s->header.features & QED_F_NEED_CHECK;
1473 return 0;
1474}
1475
1476static int bdrv_qed_change_backing_file(BlockDriverState *bs,
1477 const char *backing_file,
1478 const char *backing_fmt)
1479{
1480 BDRVQEDState *s = bs->opaque;
1481 QEDHeader new_header, le_header;
1482 void *buffer;
1483 size_t buffer_len, backing_file_len;
1484 int ret;
1485
1486
1487
1488
1489
1490
1491 if (backing_file && (s->header.compat_features &
1492 ~QED_COMPAT_FEATURE_MASK)) {
1493 return -ENOTSUP;
1494 }
1495
1496 memcpy(&new_header, &s->header, sizeof(new_header));
1497
1498 new_header.features &= ~(QED_F_BACKING_FILE |
1499 QED_F_BACKING_FORMAT_NO_PROBE);
1500
1501
1502 if (backing_file) {
1503 new_header.features |= QED_F_BACKING_FILE;
1504
1505 if (qed_fmt_is_raw(backing_fmt)) {
1506 new_header.features |= QED_F_BACKING_FORMAT_NO_PROBE;
1507 }
1508 }
1509
1510
1511 backing_file_len = 0;
1512
1513 if (backing_file) {
1514 backing_file_len = strlen(backing_file);
1515 }
1516
1517 buffer_len = sizeof(new_header);
1518 new_header.backing_filename_offset = buffer_len;
1519 new_header.backing_filename_size = backing_file_len;
1520 buffer_len += backing_file_len;
1521
1522
1523 if (buffer_len > new_header.header_size * new_header.cluster_size) {
1524 return -ENOSPC;
1525 }
1526
1527
1528 buffer = g_malloc(buffer_len);
1529
1530 qed_header_cpu_to_le(&new_header, &le_header);
1531 memcpy(buffer, &le_header, sizeof(le_header));
1532 buffer_len = sizeof(le_header);
1533
1534 if (backing_file) {
1535 memcpy(buffer + buffer_len, backing_file, backing_file_len);
1536 buffer_len += backing_file_len;
1537 }
1538
1539
1540 ret = bdrv_pwrite_sync(bs->file, 0, buffer, buffer_len);
1541 g_free(buffer);
1542 if (ret == 0) {
1543 memcpy(&s->header, &new_header, sizeof(new_header));
1544 }
1545 return ret;
1546}
1547
1548static void coroutine_fn bdrv_qed_co_invalidate_cache(BlockDriverState *bs,
1549 Error **errp)
1550{
1551 BDRVQEDState *s = bs->opaque;
1552 int ret;
1553
1554 bdrv_qed_close(bs);
1555
1556 bdrv_qed_init_state(bs);
1557 qemu_co_mutex_lock(&s->table_lock);
1558 ret = bdrv_qed_do_open(bs, NULL, bs->open_flags, errp);
1559 qemu_co_mutex_unlock(&s->table_lock);
1560 if (ret < 0) {
1561 error_prepend(errp, "Could not reopen qed layer: ");
1562 }
1563}
1564
1565static int coroutine_fn bdrv_qed_co_check(BlockDriverState *bs,
1566 BdrvCheckResult *result,
1567 BdrvCheckMode fix)
1568{
1569 BDRVQEDState *s = bs->opaque;
1570 int ret;
1571
1572 qemu_co_mutex_lock(&s->table_lock);
1573 ret = qed_check(s, result, !!fix);
1574 qemu_co_mutex_unlock(&s->table_lock);
1575
1576 return ret;
1577}
1578
1579static QemuOptsList qed_create_opts = {
1580 .name = "qed-create-opts",
1581 .head = QTAILQ_HEAD_INITIALIZER(qed_create_opts.head),
1582 .desc = {
1583 {
1584 .name = BLOCK_OPT_SIZE,
1585 .type = QEMU_OPT_SIZE,
1586 .help = "Virtual disk size"
1587 },
1588 {
1589 .name = BLOCK_OPT_BACKING_FILE,
1590 .type = QEMU_OPT_STRING,
1591 .help = "File name of a base image"
1592 },
1593 {
1594 .name = BLOCK_OPT_BACKING_FMT,
1595 .type = QEMU_OPT_STRING,
1596 .help = "Image format of the base image"
1597 },
1598 {
1599 .name = BLOCK_OPT_CLUSTER_SIZE,
1600 .type = QEMU_OPT_SIZE,
1601 .help = "Cluster size (in bytes)",
1602 .def_value_str = stringify(QED_DEFAULT_CLUSTER_SIZE)
1603 },
1604 {
1605 .name = BLOCK_OPT_TABLE_SIZE,
1606 .type = QEMU_OPT_SIZE,
1607 .help = "L1/L2 table size (in clusters)"
1608 },
1609 { }
1610 }
1611};
1612
1613static BlockDriver bdrv_qed = {
1614 .format_name = "qed",
1615 .instance_size = sizeof(BDRVQEDState),
1616 .create_opts = &qed_create_opts,
1617 .is_format = true,
1618 .supports_backing = true,
1619
1620 .bdrv_probe = bdrv_qed_probe,
1621 .bdrv_open = bdrv_qed_open,
1622 .bdrv_close = bdrv_qed_close,
1623 .bdrv_reopen_prepare = bdrv_qed_reopen_prepare,
1624 .bdrv_child_perm = bdrv_default_perms,
1625 .bdrv_co_create = bdrv_qed_co_create,
1626 .bdrv_co_create_opts = bdrv_qed_co_create_opts,
1627 .bdrv_has_zero_init = bdrv_has_zero_init_1,
1628 .bdrv_co_block_status = bdrv_qed_co_block_status,
1629 .bdrv_co_readv = bdrv_qed_co_readv,
1630 .bdrv_co_writev = bdrv_qed_co_writev,
1631 .bdrv_co_pwrite_zeroes = bdrv_qed_co_pwrite_zeroes,
1632 .bdrv_co_truncate = bdrv_qed_co_truncate,
1633 .bdrv_getlength = bdrv_qed_getlength,
1634 .bdrv_get_info = bdrv_qed_get_info,
1635 .bdrv_refresh_limits = bdrv_qed_refresh_limits,
1636 .bdrv_change_backing_file = bdrv_qed_change_backing_file,
1637 .bdrv_co_invalidate_cache = bdrv_qed_co_invalidate_cache,
1638 .bdrv_co_check = bdrv_qed_co_check,
1639 .bdrv_detach_aio_context = bdrv_qed_detach_aio_context,
1640 .bdrv_attach_aio_context = bdrv_qed_attach_aio_context,
1641 .bdrv_co_drain_begin = bdrv_qed_co_drain_begin,
1642};
1643
1644static void bdrv_qed_init(void)
1645{
1646 bdrv_register(&bdrv_qed);
1647}
1648
1649block_init(bdrv_qed_init);
1650