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33#include "qemu/osdep.h"
34#include "sysemu/block-backend.h"
35#include "sysemu/blockdev.h"
36#include "hw/block/block.h"
37#include "block/blockjob.h"
38#include "block/throttle-groups.h"
39#include "monitor/monitor.h"
40#include "qemu/error-report.h"
41#include "qemu/option.h"
42#include "qemu/config-file.h"
43#include "qapi/qmp/types.h"
44#include "qapi-visit.h"
45#include "qapi/qmp/qerror.h"
46#include "qapi/qmp-output-visitor.h"
47#include "qapi/util.h"
48#include "sysemu/sysemu.h"
49#include "block/block_int.h"
50#include "qmp-commands.h"
51#include "trace.h"
52#include "sysemu/arch_init.h"
53#include "qemu/cutils.h"
54#include "qemu/help_option.h"
55
56static QTAILQ_HEAD(, BlockDriverState) monitor_bdrv_states =
57 QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states);
58
59static const char *const if_name[IF_COUNT] = {
60 [IF_NONE] = "none",
61 [IF_IDE] = "ide",
62 [IF_SCSI] = "scsi",
63 [IF_FLOPPY] = "floppy",
64 [IF_PFLASH] = "pflash",
65 [IF_MTD] = "mtd",
66 [IF_SD] = "sd",
67 [IF_VIRTIO] = "virtio",
68 [IF_XEN] = "xen",
69};
70
71static int if_max_devs[IF_COUNT] = {
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86 [IF_IDE] = 2,
87 [IF_SCSI] = 7,
88};
89
90
91
92
93
94void override_max_devs(BlockInterfaceType type, int max_devs)
95{
96 BlockBackend *blk;
97 DriveInfo *dinfo;
98
99 if (max_devs <= 0) {
100 return;
101 }
102
103 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
104 dinfo = blk_legacy_dinfo(blk);
105 if (dinfo->type == type) {
106 fprintf(stderr, "Cannot override units-per-bus property of"
107 " the %s interface, because a drive of that type has"
108 " already been added.\n", if_name[type]);
109 g_assert_not_reached();
110 }
111 }
112
113 if_max_devs[type] = max_devs;
114}
115
116
117
118
119
120
121
122
123void blockdev_mark_auto_del(BlockBackend *blk)
124{
125 DriveInfo *dinfo = blk_legacy_dinfo(blk);
126 BlockDriverState *bs = blk_bs(blk);
127 AioContext *aio_context;
128
129 if (!dinfo) {
130 return;
131 }
132
133 if (bs) {
134 aio_context = bdrv_get_aio_context(bs);
135 aio_context_acquire(aio_context);
136
137 if (bs->job) {
138 block_job_cancel(bs->job);
139 }
140
141 aio_context_release(aio_context);
142 }
143
144 dinfo->auto_del = 1;
145}
146
147void blockdev_auto_del(BlockBackend *blk)
148{
149 DriveInfo *dinfo = blk_legacy_dinfo(blk);
150
151 if (dinfo && dinfo->auto_del) {
152 monitor_remove_blk(blk);
153 blk_unref(blk);
154 }
155}
156
157
158
159
160
161
162
163
164
165int drive_get_max_devs(BlockInterfaceType type)
166{
167 if (type >= IF_IDE && type < IF_COUNT) {
168 return if_max_devs[type];
169 }
170
171 return -1;
172}
173
174static int drive_index_to_bus_id(BlockInterfaceType type, int index)
175{
176 int max_devs = if_max_devs[type];
177 return max_devs ? index / max_devs : 0;
178}
179
180static int drive_index_to_unit_id(BlockInterfaceType type, int index)
181{
182 int max_devs = if_max_devs[type];
183 return max_devs ? index % max_devs : index;
184}
185
186QemuOpts *drive_def(const char *optstr)
187{
188 return qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr, false);
189}
190
191QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
192 const char *optstr)
193{
194 QemuOpts *opts;
195
196 opts = drive_def(optstr);
197 if (!opts) {
198 return NULL;
199 }
200 if (type != IF_DEFAULT) {
201 qemu_opt_set(opts, "if", if_name[type], &error_abort);
202 }
203 if (index >= 0) {
204 qemu_opt_set_number(opts, "index", index, &error_abort);
205 }
206 if (file)
207 qemu_opt_set(opts, "file", file, &error_abort);
208 return opts;
209}
210
211DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
212{
213 BlockBackend *blk;
214 DriveInfo *dinfo;
215
216 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
217 dinfo = blk_legacy_dinfo(blk);
218 if (dinfo && dinfo->type == type
219 && dinfo->bus == bus && dinfo->unit == unit) {
220 return dinfo;
221 }
222 }
223
224 return NULL;
225}
226
227bool drive_check_orphaned(void)
228{
229 BlockBackend *blk;
230 DriveInfo *dinfo;
231 bool rs = false;
232
233 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
234 dinfo = blk_legacy_dinfo(blk);
235
236
237 if (!blk_get_attached_dev(blk) && !dinfo->is_default &&
238 dinfo->type != IF_NONE) {
239 fprintf(stderr, "Warning: Orphaned drive without device: "
240 "id=%s,file=%s,if=%s,bus=%d,unit=%d\n",
241 blk_name(blk), blk_bs(blk) ? blk_bs(blk)->filename : "",
242 if_name[dinfo->type], dinfo->bus, dinfo->unit);
243 rs = true;
244 }
245 }
246
247 return rs;
248}
249
250DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
251{
252 return drive_get(type,
253 drive_index_to_bus_id(type, index),
254 drive_index_to_unit_id(type, index));
255}
256
257int drive_get_max_bus(BlockInterfaceType type)
258{
259 int max_bus;
260 BlockBackend *blk;
261 DriveInfo *dinfo;
262
263 max_bus = -1;
264 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
265 dinfo = blk_legacy_dinfo(blk);
266 if (dinfo && dinfo->type == type && dinfo->bus > max_bus) {
267 max_bus = dinfo->bus;
268 }
269 }
270 return max_bus;
271}
272
273
274
275
276DriveInfo *drive_get_next(BlockInterfaceType type)
277{
278 static int next_block_unit[IF_COUNT];
279
280 return drive_get(type, 0, next_block_unit[type]++);
281}
282
283static void bdrv_format_print(void *opaque, const char *name)
284{
285 error_printf(" %s", name);
286}
287
288typedef struct {
289 QEMUBH *bh;
290 BlockDriverState *bs;
291} BDRVPutRefBH;
292
293static int parse_block_error_action(const char *buf, bool is_read, Error **errp)
294{
295 if (!strcmp(buf, "ignore")) {
296 return BLOCKDEV_ON_ERROR_IGNORE;
297 } else if (!is_read && !strcmp(buf, "enospc")) {
298 return BLOCKDEV_ON_ERROR_ENOSPC;
299 } else if (!strcmp(buf, "stop")) {
300 return BLOCKDEV_ON_ERROR_STOP;
301 } else if (!strcmp(buf, "report")) {
302 return BLOCKDEV_ON_ERROR_REPORT;
303 } else {
304 error_setg(errp, "'%s' invalid %s error action",
305 buf, is_read ? "read" : "write");
306 return -1;
307 }
308}
309
310static bool parse_stats_intervals(BlockAcctStats *stats, QList *intervals,
311 Error **errp)
312{
313 const QListEntry *entry;
314 for (entry = qlist_first(intervals); entry; entry = qlist_next(entry)) {
315 switch (qobject_type(entry->value)) {
316
317 case QTYPE_QSTRING: {
318 unsigned long long length;
319 const char *str = qstring_get_str(qobject_to_qstring(entry->value));
320 if (parse_uint_full(str, &length, 10) == 0 &&
321 length > 0 && length <= UINT_MAX) {
322 block_acct_add_interval(stats, (unsigned) length);
323 } else {
324 error_setg(errp, "Invalid interval length: %s", str);
325 return false;
326 }
327 break;
328 }
329
330 case QTYPE_QINT: {
331 int64_t length = qint_get_int(qobject_to_qint(entry->value));
332 if (length > 0 && length <= UINT_MAX) {
333 block_acct_add_interval(stats, (unsigned) length);
334 } else {
335 error_setg(errp, "Invalid interval length: %" PRId64, length);
336 return false;
337 }
338 break;
339 }
340
341 default:
342 error_setg(errp, "The specification of stats-intervals is invalid");
343 return false;
344 }
345 }
346 return true;
347}
348
349typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType;
350
351
352static void extract_common_blockdev_options(QemuOpts *opts, int *bdrv_flags,
353 const char **throttling_group, ThrottleConfig *throttle_cfg,
354 BlockdevDetectZeroesOptions *detect_zeroes, Error **errp)
355{
356 const char *discard;
357 Error *local_error = NULL;
358 const char *aio;
359
360 if (bdrv_flags) {
361 if (!qemu_opt_get_bool(opts, "read-only", false)) {
362 *bdrv_flags |= BDRV_O_RDWR;
363 }
364 if (qemu_opt_get_bool(opts, "copy-on-read", false)) {
365 *bdrv_flags |= BDRV_O_COPY_ON_READ;
366 }
367
368 if ((discard = qemu_opt_get(opts, "discard")) != NULL) {
369 if (bdrv_parse_discard_flags(discard, bdrv_flags) != 0) {
370 error_setg(errp, "Invalid discard option");
371 return;
372 }
373 }
374
375 if ((aio = qemu_opt_get(opts, "aio")) != NULL) {
376 if (!strcmp(aio, "native")) {
377 *bdrv_flags |= BDRV_O_NATIVE_AIO;
378 } else if (!strcmp(aio, "threads")) {
379
380 } else {
381 error_setg(errp, "invalid aio option");
382 return;
383 }
384 }
385 }
386
387
388 if (throttling_group) {
389 *throttling_group = qemu_opt_get(opts, "throttling.group");
390 }
391
392 if (throttle_cfg) {
393 throttle_config_init(throttle_cfg);
394 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].avg =
395 qemu_opt_get_number(opts, "throttling.bps-total", 0);
396 throttle_cfg->buckets[THROTTLE_BPS_READ].avg =
397 qemu_opt_get_number(opts, "throttling.bps-read", 0);
398 throttle_cfg->buckets[THROTTLE_BPS_WRITE].avg =
399 qemu_opt_get_number(opts, "throttling.bps-write", 0);
400 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].avg =
401 qemu_opt_get_number(opts, "throttling.iops-total", 0);
402 throttle_cfg->buckets[THROTTLE_OPS_READ].avg =
403 qemu_opt_get_number(opts, "throttling.iops-read", 0);
404 throttle_cfg->buckets[THROTTLE_OPS_WRITE].avg =
405 qemu_opt_get_number(opts, "throttling.iops-write", 0);
406
407 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].max =
408 qemu_opt_get_number(opts, "throttling.bps-total-max", 0);
409 throttle_cfg->buckets[THROTTLE_BPS_READ].max =
410 qemu_opt_get_number(opts, "throttling.bps-read-max", 0);
411 throttle_cfg->buckets[THROTTLE_BPS_WRITE].max =
412 qemu_opt_get_number(opts, "throttling.bps-write-max", 0);
413 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].max =
414 qemu_opt_get_number(opts, "throttling.iops-total-max", 0);
415 throttle_cfg->buckets[THROTTLE_OPS_READ].max =
416 qemu_opt_get_number(opts, "throttling.iops-read-max", 0);
417 throttle_cfg->buckets[THROTTLE_OPS_WRITE].max =
418 qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
419
420 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].burst_length =
421 qemu_opt_get_number(opts, "throttling.bps-total-max-length", 1);
422 throttle_cfg->buckets[THROTTLE_BPS_READ].burst_length =
423 qemu_opt_get_number(opts, "throttling.bps-read-max-length", 1);
424 throttle_cfg->buckets[THROTTLE_BPS_WRITE].burst_length =
425 qemu_opt_get_number(opts, "throttling.bps-write-max-length", 1);
426 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].burst_length =
427 qemu_opt_get_number(opts, "throttling.iops-total-max-length", 1);
428 throttle_cfg->buckets[THROTTLE_OPS_READ].burst_length =
429 qemu_opt_get_number(opts, "throttling.iops-read-max-length", 1);
430 throttle_cfg->buckets[THROTTLE_OPS_WRITE].burst_length =
431 qemu_opt_get_number(opts, "throttling.iops-write-max-length", 1);
432
433 throttle_cfg->op_size =
434 qemu_opt_get_number(opts, "throttling.iops-size", 0);
435
436 if (!throttle_is_valid(throttle_cfg, errp)) {
437 return;
438 }
439 }
440
441 if (detect_zeroes) {
442 *detect_zeroes =
443 qapi_enum_parse(BlockdevDetectZeroesOptions_lookup,
444 qemu_opt_get(opts, "detect-zeroes"),
445 BLOCKDEV_DETECT_ZEROES_OPTIONS__MAX,
446 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF,
447 &local_error);
448 if (local_error) {
449 error_propagate(errp, local_error);
450 return;
451 }
452
453 if (bdrv_flags &&
454 *detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP &&
455 !(*bdrv_flags & BDRV_O_UNMAP))
456 {
457 error_setg(errp, "setting detect-zeroes to unmap is not allowed "
458 "without setting discard operation to unmap");
459 return;
460 }
461 }
462}
463
464
465static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
466 Error **errp)
467{
468 const char *buf;
469 int bdrv_flags = 0;
470 int on_read_error, on_write_error;
471 bool account_invalid, account_failed;
472 bool writethrough;
473 BlockBackend *blk;
474 BlockDriverState *bs;
475 ThrottleConfig cfg;
476 int snapshot = 0;
477 Error *error = NULL;
478 QemuOpts *opts;
479 QDict *interval_dict = NULL;
480 QList *interval_list = NULL;
481 const char *id;
482 BlockdevDetectZeroesOptions detect_zeroes =
483 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF;
484 const char *blk_id;
485 const char *throttling_group = NULL;
486
487
488
489 id = qdict_get_try_str(bs_opts, "id");
490 opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
491 if (error) {
492 error_propagate(errp, error);
493 goto err_no_opts;
494 }
495
496 qemu_opts_absorb_qdict(opts, bs_opts, &error);
497 if (error) {
498 error_propagate(errp, error);
499 goto early_err;
500 }
501
502 if (id) {
503 qdict_del(bs_opts, "id");
504 }
505
506
507 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
508
509 account_invalid = qemu_opt_get_bool(opts, "stats-account-invalid", true);
510 account_failed = qemu_opt_get_bool(opts, "stats-account-failed", true);
511
512 writethrough = !qemu_opt_get_bool(opts, BDRV_OPT_CACHE_WB, true);
513
514 blk_id = qemu_opts_id(opts);
515
516 qdict_extract_subqdict(bs_opts, &interval_dict, "stats-intervals.");
517 qdict_array_split(interval_dict, &interval_list);
518
519 if (qdict_size(interval_dict) != 0) {
520 error_setg(errp, "Invalid option stats-intervals.%s",
521 qdict_first(interval_dict)->key);
522 goto early_err;
523 }
524
525 extract_common_blockdev_options(opts, &bdrv_flags, &throttling_group, &cfg,
526 &detect_zeroes, &error);
527 if (error) {
528 error_propagate(errp, error);
529 goto early_err;
530 }
531
532 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
533 if (is_help_option(buf)) {
534 error_printf("Supported formats:");
535 bdrv_iterate_format(bdrv_format_print, NULL);
536 error_printf("\n");
537 goto early_err;
538 }
539
540 if (qdict_haskey(bs_opts, "driver")) {
541 error_setg(errp, "Cannot specify both 'driver' and 'format'");
542 goto early_err;
543 }
544 qdict_put(bs_opts, "driver", qstring_from_str(buf));
545 }
546
547 on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
548 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
549 on_write_error = parse_block_error_action(buf, 0, &error);
550 if (error) {
551 error_propagate(errp, error);
552 goto early_err;
553 }
554 }
555
556 on_read_error = BLOCKDEV_ON_ERROR_REPORT;
557 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
558 on_read_error = parse_block_error_action(buf, 1, &error);
559 if (error) {
560 error_propagate(errp, error);
561 goto early_err;
562 }
563 }
564
565 if (snapshot) {
566 bdrv_flags |= BDRV_O_SNAPSHOT;
567 }
568
569
570 if ((!file || !*file) && !qdict_size(bs_opts)) {
571 BlockBackendRootState *blk_rs;
572
573 blk = blk_new(errp);
574 if (!blk) {
575 goto early_err;
576 }
577
578 blk_rs = blk_get_root_state(blk);
579 blk_rs->open_flags = bdrv_flags;
580 blk_rs->read_only = !(bdrv_flags & BDRV_O_RDWR);
581 blk_rs->detect_zeroes = detect_zeroes;
582
583 if (throttle_enabled(&cfg)) {
584 if (!throttling_group) {
585 throttling_group = blk_id;
586 }
587 blk_rs->throttle_group = g_strdup(throttling_group);
588 blk_rs->throttle_state = throttle_group_incref(throttling_group);
589 blk_rs->throttle_state->cfg = cfg;
590 }
591
592 QDECREF(bs_opts);
593 } else {
594 if (file && !*file) {
595 file = NULL;
596 }
597
598
599
600
601 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
602 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
603 assert((bdrv_flags & BDRV_O_CACHE_MASK) == 0);
604
605 if (runstate_check(RUN_STATE_INMIGRATE)) {
606 bdrv_flags |= BDRV_O_INACTIVE;
607 }
608
609 blk = blk_new_open(file, NULL, bs_opts, bdrv_flags, errp);
610 if (!blk) {
611 goto err_no_bs_opts;
612 }
613 bs = blk_bs(blk);
614
615 bs->detect_zeroes = detect_zeroes;
616
617
618 if (throttle_enabled(&cfg)) {
619 if (!throttling_group) {
620 throttling_group = blk_id;
621 }
622 bdrv_io_limits_enable(bs, throttling_group);
623 bdrv_set_io_limits(bs, &cfg);
624 }
625
626 if (bdrv_key_required(bs)) {
627 autostart = 0;
628 }
629
630 block_acct_init(blk_get_stats(blk), account_invalid, account_failed);
631
632 if (!parse_stats_intervals(blk_get_stats(blk), interval_list, errp)) {
633 blk_unref(blk);
634 blk = NULL;
635 goto err_no_bs_opts;
636 }
637 }
638
639 blk_set_enable_write_cache(blk, !writethrough);
640 blk_set_on_error(blk, on_read_error, on_write_error);
641
642 if (!monitor_add_blk(blk, blk_id, errp)) {
643 blk_unref(blk);
644 blk = NULL;
645 goto err_no_bs_opts;
646 }
647
648err_no_bs_opts:
649 qemu_opts_del(opts);
650 QDECREF(interval_dict);
651 QDECREF(interval_list);
652 return blk;
653
654early_err:
655 qemu_opts_del(opts);
656 QDECREF(interval_dict);
657 QDECREF(interval_list);
658err_no_opts:
659 QDECREF(bs_opts);
660 return NULL;
661}
662
663static QemuOptsList qemu_root_bds_opts;
664
665
666static BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp)
667{
668 BlockDriverState *bs;
669 QemuOpts *opts;
670 Error *local_error = NULL;
671 BlockdevDetectZeroesOptions detect_zeroes;
672 int ret;
673 int bdrv_flags = 0;
674
675 opts = qemu_opts_create(&qemu_root_bds_opts, NULL, 1, errp);
676 if (!opts) {
677 goto fail;
678 }
679
680 qemu_opts_absorb_qdict(opts, bs_opts, &local_error);
681 if (local_error) {
682 error_propagate(errp, local_error);
683 goto fail;
684 }
685
686 extract_common_blockdev_options(opts, &bdrv_flags, NULL, NULL,
687 &detect_zeroes, &local_error);
688 if (local_error) {
689 error_propagate(errp, local_error);
690 goto fail;
691 }
692
693
694
695
696 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
697 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
698
699 if (runstate_check(RUN_STATE_INMIGRATE)) {
700 bdrv_flags |= BDRV_O_INACTIVE;
701 }
702
703 bs = NULL;
704 ret = bdrv_open(&bs, NULL, NULL, bs_opts, bdrv_flags, errp);
705 if (ret < 0) {
706 goto fail_no_bs_opts;
707 }
708
709 bs->detect_zeroes = detect_zeroes;
710
711fail_no_bs_opts:
712 qemu_opts_del(opts);
713 return bs;
714
715fail:
716 qemu_opts_del(opts);
717 QDECREF(bs_opts);
718 return NULL;
719}
720
721void blockdev_close_all_bdrv_states(void)
722{
723 BlockDriverState *bs, *next_bs;
724
725 QTAILQ_FOREACH_SAFE(bs, &monitor_bdrv_states, monitor_list, next_bs) {
726 AioContext *ctx = bdrv_get_aio_context(bs);
727
728 aio_context_acquire(ctx);
729 bdrv_unref(bs);
730 aio_context_release(ctx);
731 }
732}
733
734
735BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs)
736{
737 return bs ? QTAILQ_NEXT(bs, monitor_list)
738 : QTAILQ_FIRST(&monitor_bdrv_states);
739}
740
741static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to,
742 Error **errp)
743{
744 const char *value;
745
746 value = qemu_opt_get(opts, from);
747 if (value) {
748 if (qemu_opt_find(opts, to)) {
749 error_setg(errp, "'%s' and its alias '%s' can't be used at the "
750 "same time", to, from);
751 return;
752 }
753 }
754
755
756 while ((value = qemu_opt_get(opts, from))) {
757 qemu_opt_set(opts, to, value, &error_abort);
758 qemu_opt_unset(opts, from);
759 }
760}
761
762QemuOptsList qemu_legacy_drive_opts = {
763 .name = "drive",
764 .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head),
765 .desc = {
766 {
767 .name = "bus",
768 .type = QEMU_OPT_NUMBER,
769 .help = "bus number",
770 },{
771 .name = "unit",
772 .type = QEMU_OPT_NUMBER,
773 .help = "unit number (i.e. lun for scsi)",
774 },{
775 .name = "index",
776 .type = QEMU_OPT_NUMBER,
777 .help = "index number",
778 },{
779 .name = "media",
780 .type = QEMU_OPT_STRING,
781 .help = "media type (disk, cdrom)",
782 },{
783 .name = "if",
784 .type = QEMU_OPT_STRING,
785 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
786 },{
787 .name = "cyls",
788 .type = QEMU_OPT_NUMBER,
789 .help = "number of cylinders (ide disk geometry)",
790 },{
791 .name = "heads",
792 .type = QEMU_OPT_NUMBER,
793 .help = "number of heads (ide disk geometry)",
794 },{
795 .name = "secs",
796 .type = QEMU_OPT_NUMBER,
797 .help = "number of sectors (ide disk geometry)",
798 },{
799 .name = "trans",
800 .type = QEMU_OPT_STRING,
801 .help = "chs translation (auto, lba, none)",
802 },{
803 .name = "boot",
804 .type = QEMU_OPT_BOOL,
805 .help = "(deprecated, ignored)",
806 },{
807 .name = "addr",
808 .type = QEMU_OPT_STRING,
809 .help = "pci address (virtio only)",
810 },{
811 .name = "serial",
812 .type = QEMU_OPT_STRING,
813 .help = "disk serial number",
814 },{
815 .name = "file",
816 .type = QEMU_OPT_STRING,
817 .help = "file name",
818 },
819
820
821 {
822 .name = "read-only",
823 .type = QEMU_OPT_BOOL,
824 .help = "open drive file as read-only",
825 },{
826 .name = "rerror",
827 .type = QEMU_OPT_STRING,
828 .help = "read error action",
829 },{
830 .name = "werror",
831 .type = QEMU_OPT_STRING,
832 .help = "write error action",
833 },{
834 .name = "copy-on-read",
835 .type = QEMU_OPT_BOOL,
836 .help = "copy read data from backing file into image file",
837 },
838
839 { }
840 },
841};
842
843DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type)
844{
845 const char *value;
846 BlockBackend *blk;
847 DriveInfo *dinfo = NULL;
848 QDict *bs_opts;
849 QemuOpts *legacy_opts;
850 DriveMediaType media = MEDIA_DISK;
851 BlockInterfaceType type;
852 int cyls, heads, secs, translation;
853 int max_devs, bus_id, unit_id, index;
854 const char *devaddr;
855 const char *werror, *rerror;
856 bool read_only = false;
857 bool copy_on_read;
858 const char *serial;
859 const char *filename;
860 Error *local_err = NULL;
861 int i;
862
863
864 static const struct {
865 const char *from;
866 const char *to;
867 } opt_renames[] = {
868 { "iops", "throttling.iops-total" },
869 { "iops_rd", "throttling.iops-read" },
870 { "iops_wr", "throttling.iops-write" },
871
872 { "bps", "throttling.bps-total" },
873 { "bps_rd", "throttling.bps-read" },
874 { "bps_wr", "throttling.bps-write" },
875
876 { "iops_max", "throttling.iops-total-max" },
877 { "iops_rd_max", "throttling.iops-read-max" },
878 { "iops_wr_max", "throttling.iops-write-max" },
879
880 { "bps_max", "throttling.bps-total-max" },
881 { "bps_rd_max", "throttling.bps-read-max" },
882 { "bps_wr_max", "throttling.bps-write-max" },
883
884 { "iops_size", "throttling.iops-size" },
885
886 { "group", "throttling.group" },
887
888 { "readonly", "read-only" },
889 };
890
891 for (i = 0; i < ARRAY_SIZE(opt_renames); i++) {
892 qemu_opt_rename(all_opts, opt_renames[i].from, opt_renames[i].to,
893 &local_err);
894 if (local_err) {
895 error_report_err(local_err);
896 return NULL;
897 }
898 }
899
900 value = qemu_opt_get(all_opts, "cache");
901 if (value) {
902 int flags = 0;
903 bool writethrough;
904
905 if (bdrv_parse_cache_mode(value, &flags, &writethrough) != 0) {
906 error_report("invalid cache option");
907 return NULL;
908 }
909
910
911 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_WB)) {
912 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_WB,
913 !writethrough, &error_abort);
914 }
915 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_DIRECT)) {
916 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_DIRECT,
917 !!(flags & BDRV_O_NOCACHE), &error_abort);
918 }
919 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_NO_FLUSH)) {
920 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_NO_FLUSH,
921 !!(flags & BDRV_O_NO_FLUSH), &error_abort);
922 }
923 qemu_opt_unset(all_opts, "cache");
924 }
925
926
927 bs_opts = qdict_new();
928 qemu_opts_to_qdict(all_opts, bs_opts);
929
930 legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0,
931 &error_abort);
932 qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err);
933 if (local_err) {
934 error_report_err(local_err);
935 goto fail;
936 }
937
938
939 if (qemu_opt_get(legacy_opts, "boot") != NULL) {
940 fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
941 "ignored. Future versions will reject this parameter. Please "
942 "update your scripts.\n");
943 }
944
945
946 value = qemu_opt_get(legacy_opts, "media");
947 if (value) {
948 if (!strcmp(value, "disk")) {
949 media = MEDIA_DISK;
950 } else if (!strcmp(value, "cdrom")) {
951 media = MEDIA_CDROM;
952 read_only = true;
953 } else {
954 error_report("'%s' invalid media", value);
955 goto fail;
956 }
957 }
958
959
960 read_only |= qemu_opt_get_bool(legacy_opts, "read-only", false);
961 copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false);
962
963 if (read_only && copy_on_read) {
964 error_report("warning: disabling copy-on-read on read-only drive");
965 copy_on_read = false;
966 }
967
968 qdict_put(bs_opts, "read-only",
969 qstring_from_str(read_only ? "on" : "off"));
970 qdict_put(bs_opts, "copy-on-read",
971 qstring_from_str(copy_on_read ? "on" :"off"));
972
973
974 value = qemu_opt_get(legacy_opts, "if");
975 if (value) {
976 for (type = 0;
977 type < IF_COUNT && strcmp(value, if_name[type]);
978 type++) {
979 }
980 if (type == IF_COUNT) {
981 error_report("unsupported bus type '%s'", value);
982 goto fail;
983 }
984 } else {
985 type = block_default_type;
986 }
987
988
989 cyls = qemu_opt_get_number(legacy_opts, "cyls", 0);
990 heads = qemu_opt_get_number(legacy_opts, "heads", 0);
991 secs = qemu_opt_get_number(legacy_opts, "secs", 0);
992
993 if (cyls || heads || secs) {
994 if (cyls < 1) {
995 error_report("invalid physical cyls number");
996 goto fail;
997 }
998 if (heads < 1) {
999 error_report("invalid physical heads number");
1000 goto fail;
1001 }
1002 if (secs < 1) {
1003 error_report("invalid physical secs number");
1004 goto fail;
1005 }
1006 }
1007
1008 translation = BIOS_ATA_TRANSLATION_AUTO;
1009 value = qemu_opt_get(legacy_opts, "trans");
1010 if (value != NULL) {
1011 if (!cyls) {
1012 error_report("'%s' trans must be used with cyls, heads and secs",
1013 value);
1014 goto fail;
1015 }
1016 if (!strcmp(value, "none")) {
1017 translation = BIOS_ATA_TRANSLATION_NONE;
1018 } else if (!strcmp(value, "lba")) {
1019 translation = BIOS_ATA_TRANSLATION_LBA;
1020 } else if (!strcmp(value, "large")) {
1021 translation = BIOS_ATA_TRANSLATION_LARGE;
1022 } else if (!strcmp(value, "rechs")) {
1023 translation = BIOS_ATA_TRANSLATION_RECHS;
1024 } else if (!strcmp(value, "auto")) {
1025 translation = BIOS_ATA_TRANSLATION_AUTO;
1026 } else {
1027 error_report("'%s' invalid translation type", value);
1028 goto fail;
1029 }
1030 }
1031
1032 if (media == MEDIA_CDROM) {
1033 if (cyls || secs || heads) {
1034 error_report("CHS can't be set with media=cdrom");
1035 goto fail;
1036 }
1037 }
1038
1039
1040
1041 bus_id = qemu_opt_get_number(legacy_opts, "bus", 0);
1042 unit_id = qemu_opt_get_number(legacy_opts, "unit", -1);
1043 index = qemu_opt_get_number(legacy_opts, "index", -1);
1044
1045 max_devs = if_max_devs[type];
1046
1047 if (index != -1) {
1048 if (bus_id != 0 || unit_id != -1) {
1049 error_report("index cannot be used with bus and unit");
1050 goto fail;
1051 }
1052 bus_id = drive_index_to_bus_id(type, index);
1053 unit_id = drive_index_to_unit_id(type, index);
1054 }
1055
1056 if (unit_id == -1) {
1057 unit_id = 0;
1058 while (drive_get(type, bus_id, unit_id) != NULL) {
1059 unit_id++;
1060 if (max_devs && unit_id >= max_devs) {
1061 unit_id -= max_devs;
1062 bus_id++;
1063 }
1064 }
1065 }
1066
1067 if (max_devs && unit_id >= max_devs) {
1068 error_report("unit %d too big (max is %d)", unit_id, max_devs - 1);
1069 goto fail;
1070 }
1071
1072 if (drive_get(type, bus_id, unit_id) != NULL) {
1073 error_report("drive with bus=%d, unit=%d (index=%d) exists",
1074 bus_id, unit_id, index);
1075 goto fail;
1076 }
1077
1078
1079 serial = qemu_opt_get(legacy_opts, "serial");
1080
1081
1082 if (qemu_opts_id(all_opts) == NULL) {
1083 char *new_id;
1084 const char *mediastr = "";
1085 if (type == IF_IDE || type == IF_SCSI) {
1086 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
1087 }
1088 if (max_devs) {
1089 new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id,
1090 mediastr, unit_id);
1091 } else {
1092 new_id = g_strdup_printf("%s%s%i", if_name[type],
1093 mediastr, unit_id);
1094 }
1095 qdict_put(bs_opts, "id", qstring_from_str(new_id));
1096 g_free(new_id);
1097 }
1098
1099
1100 devaddr = qemu_opt_get(legacy_opts, "addr");
1101 if (devaddr && type != IF_VIRTIO) {
1102 error_report("addr is not supported by this bus type");
1103 goto fail;
1104 }
1105
1106 if (type == IF_VIRTIO) {
1107 QemuOpts *devopts;
1108 devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
1109 &error_abort);
1110 if (arch_type == QEMU_ARCH_S390X) {
1111 qemu_opt_set(devopts, "driver", "virtio-blk-ccw", &error_abort);
1112 } else {
1113 qemu_opt_set(devopts, "driver", "virtio-blk-pci", &error_abort);
1114 }
1115 qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"),
1116 &error_abort);
1117 if (devaddr) {
1118 qemu_opt_set(devopts, "addr", devaddr, &error_abort);
1119 }
1120 }
1121
1122 filename = qemu_opt_get(legacy_opts, "file");
1123
1124
1125 werror = qemu_opt_get(legacy_opts, "werror");
1126 if (werror != NULL) {
1127 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO &&
1128 type != IF_NONE) {
1129 error_report("werror is not supported by this bus type");
1130 goto fail;
1131 }
1132 qdict_put(bs_opts, "werror", qstring_from_str(werror));
1133 }
1134
1135 rerror = qemu_opt_get(legacy_opts, "rerror");
1136 if (rerror != NULL) {
1137 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI &&
1138 type != IF_NONE) {
1139 error_report("rerror is not supported by this bus type");
1140 goto fail;
1141 }
1142 qdict_put(bs_opts, "rerror", qstring_from_str(rerror));
1143 }
1144
1145
1146 blk = blockdev_init(filename, bs_opts, &local_err);
1147 bs_opts = NULL;
1148 if (!blk) {
1149 if (local_err) {
1150 error_report_err(local_err);
1151 }
1152 goto fail;
1153 } else {
1154 assert(!local_err);
1155 }
1156
1157
1158 dinfo = g_malloc0(sizeof(*dinfo));
1159 dinfo->opts = all_opts;
1160
1161 dinfo->cyls = cyls;
1162 dinfo->heads = heads;
1163 dinfo->secs = secs;
1164 dinfo->trans = translation;
1165
1166 dinfo->type = type;
1167 dinfo->bus = bus_id;
1168 dinfo->unit = unit_id;
1169 dinfo->devaddr = devaddr;
1170 dinfo->serial = g_strdup(serial);
1171
1172 blk_set_legacy_dinfo(blk, dinfo);
1173
1174 switch(type) {
1175 case IF_IDE:
1176 case IF_SCSI:
1177 case IF_XEN:
1178 case IF_NONE:
1179 dinfo->media_cd = media == MEDIA_CDROM;
1180 break;
1181 default:
1182 break;
1183 }
1184
1185fail:
1186 qemu_opts_del(legacy_opts);
1187 QDECREF(bs_opts);
1188 return dinfo;
1189}
1190
1191void hmp_commit(Monitor *mon, const QDict *qdict)
1192{
1193 const char *device = qdict_get_str(qdict, "device");
1194 BlockBackend *blk;
1195 int ret;
1196
1197 if (!strcmp(device, "all")) {
1198 ret = blk_commit_all();
1199 } else {
1200 BlockDriverState *bs;
1201 AioContext *aio_context;
1202
1203 blk = blk_by_name(device);
1204 if (!blk) {
1205 monitor_printf(mon, "Device '%s' not found\n", device);
1206 return;
1207 }
1208 if (!blk_is_available(blk)) {
1209 monitor_printf(mon, "Device '%s' has no medium\n", device);
1210 return;
1211 }
1212
1213 bs = blk_bs(blk);
1214 aio_context = bdrv_get_aio_context(bs);
1215 aio_context_acquire(aio_context);
1216
1217 ret = bdrv_commit(bs);
1218
1219 aio_context_release(aio_context);
1220 }
1221 if (ret < 0) {
1222 monitor_printf(mon, "'commit' error for '%s': %s\n", device,
1223 strerror(-ret));
1224 }
1225}
1226
1227static void blockdev_do_action(TransactionAction *action, Error **errp)
1228{
1229 TransactionActionList list;
1230
1231 list.value = action;
1232 list.next = NULL;
1233 qmp_transaction(&list, false, NULL, errp);
1234}
1235
1236void qmp_blockdev_snapshot_sync(bool has_device, const char *device,
1237 bool has_node_name, const char *node_name,
1238 const char *snapshot_file,
1239 bool has_snapshot_node_name,
1240 const char *snapshot_node_name,
1241 bool has_format, const char *format,
1242 bool has_mode, NewImageMode mode, Error **errp)
1243{
1244 BlockdevSnapshotSync snapshot = {
1245 .has_device = has_device,
1246 .device = (char *) device,
1247 .has_node_name = has_node_name,
1248 .node_name = (char *) node_name,
1249 .snapshot_file = (char *) snapshot_file,
1250 .has_snapshot_node_name = has_snapshot_node_name,
1251 .snapshot_node_name = (char *) snapshot_node_name,
1252 .has_format = has_format,
1253 .format = (char *) format,
1254 .has_mode = has_mode,
1255 .mode = mode,
1256 };
1257 TransactionAction action = {
1258 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
1259 .u.blockdev_snapshot_sync.data = &snapshot,
1260 };
1261 blockdev_do_action(&action, errp);
1262}
1263
1264void qmp_blockdev_snapshot(const char *node, const char *overlay,
1265 Error **errp)
1266{
1267 BlockdevSnapshot snapshot_data = {
1268 .node = (char *) node,
1269 .overlay = (char *) overlay
1270 };
1271 TransactionAction action = {
1272 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT,
1273 .u.blockdev_snapshot.data = &snapshot_data,
1274 };
1275 blockdev_do_action(&action, errp);
1276}
1277
1278void qmp_blockdev_snapshot_internal_sync(const char *device,
1279 const char *name,
1280 Error **errp)
1281{
1282 BlockdevSnapshotInternal snapshot = {
1283 .device = (char *) device,
1284 .name = (char *) name
1285 };
1286 TransactionAction action = {
1287 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC,
1288 .u.blockdev_snapshot_internal_sync.data = &snapshot,
1289 };
1290 blockdev_do_action(&action, errp);
1291}
1292
1293SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device,
1294 bool has_id,
1295 const char *id,
1296 bool has_name,
1297 const char *name,
1298 Error **errp)
1299{
1300 BlockDriverState *bs;
1301 BlockBackend *blk;
1302 AioContext *aio_context;
1303 QEMUSnapshotInfo sn;
1304 Error *local_err = NULL;
1305 SnapshotInfo *info = NULL;
1306 int ret;
1307
1308 blk = blk_by_name(device);
1309 if (!blk) {
1310 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1311 "Device '%s' not found", device);
1312 return NULL;
1313 }
1314
1315 aio_context = blk_get_aio_context(blk);
1316 aio_context_acquire(aio_context);
1317
1318 if (!has_id) {
1319 id = NULL;
1320 }
1321
1322 if (!has_name) {
1323 name = NULL;
1324 }
1325
1326 if (!id && !name) {
1327 error_setg(errp, "Name or id must be provided");
1328 goto out_aio_context;
1329 }
1330
1331 if (!blk_is_available(blk)) {
1332 error_setg(errp, "Device '%s' has no medium", device);
1333 goto out_aio_context;
1334 }
1335 bs = blk_bs(blk);
1336
1337 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, errp)) {
1338 goto out_aio_context;
1339 }
1340
1341 ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err);
1342 if (local_err) {
1343 error_propagate(errp, local_err);
1344 goto out_aio_context;
1345 }
1346 if (!ret) {
1347 error_setg(errp,
1348 "Snapshot with id '%s' and name '%s' does not exist on "
1349 "device '%s'",
1350 STR_OR_NULL(id), STR_OR_NULL(name), device);
1351 goto out_aio_context;
1352 }
1353
1354 bdrv_snapshot_delete(bs, id, name, &local_err);
1355 if (local_err) {
1356 error_propagate(errp, local_err);
1357 goto out_aio_context;
1358 }
1359
1360 aio_context_release(aio_context);
1361
1362 info = g_new0(SnapshotInfo, 1);
1363 info->id = g_strdup(sn.id_str);
1364 info->name = g_strdup(sn.name);
1365 info->date_nsec = sn.date_nsec;
1366 info->date_sec = sn.date_sec;
1367 info->vm_state_size = sn.vm_state_size;
1368 info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000;
1369 info->vm_clock_sec = sn.vm_clock_nsec / 1000000000;
1370
1371 return info;
1372
1373out_aio_context:
1374 aio_context_release(aio_context);
1375 return NULL;
1376}
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391static BdrvDirtyBitmap *block_dirty_bitmap_lookup(const char *node,
1392 const char *name,
1393 BlockDriverState **pbs,
1394 AioContext **paio,
1395 Error **errp)
1396{
1397 BlockDriverState *bs;
1398 BdrvDirtyBitmap *bitmap;
1399 AioContext *aio_context;
1400
1401 if (!node) {
1402 error_setg(errp, "Node cannot be NULL");
1403 return NULL;
1404 }
1405 if (!name) {
1406 error_setg(errp, "Bitmap name cannot be NULL");
1407 return NULL;
1408 }
1409 bs = bdrv_lookup_bs(node, node, NULL);
1410 if (!bs) {
1411 error_setg(errp, "Node '%s' not found", node);
1412 return NULL;
1413 }
1414
1415 aio_context = bdrv_get_aio_context(bs);
1416 aio_context_acquire(aio_context);
1417
1418 bitmap = bdrv_find_dirty_bitmap(bs, name);
1419 if (!bitmap) {
1420 error_setg(errp, "Dirty bitmap '%s' not found", name);
1421 goto fail;
1422 }
1423
1424 if (pbs) {
1425 *pbs = bs;
1426 }
1427 if (paio) {
1428 *paio = aio_context;
1429 } else {
1430 aio_context_release(aio_context);
1431 }
1432
1433 return bitmap;
1434
1435 fail:
1436 aio_context_release(aio_context);
1437 return NULL;
1438}
1439
1440
1441
1442typedef struct BlkActionState BlkActionState;
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458typedef struct BlkActionOps {
1459 size_t instance_size;
1460 void (*prepare)(BlkActionState *common, Error **errp);
1461 void (*commit)(BlkActionState *common);
1462 void (*abort)(BlkActionState *common);
1463 void (*clean)(BlkActionState *common);
1464} BlkActionOps;
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479struct BlkActionState {
1480 TransactionAction *action;
1481 const BlkActionOps *ops;
1482 BlockJobTxn *block_job_txn;
1483 TransactionProperties *txn_props;
1484 QSIMPLEQ_ENTRY(BlkActionState) entry;
1485};
1486
1487
1488typedef struct InternalSnapshotState {
1489 BlkActionState common;
1490 BlockDriverState *bs;
1491 AioContext *aio_context;
1492 QEMUSnapshotInfo sn;
1493 bool created;
1494} InternalSnapshotState;
1495
1496
1497static int action_check_completion_mode(BlkActionState *s, Error **errp)
1498{
1499 if (s->txn_props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) {
1500 error_setg(errp,
1501 "Action '%s' does not support Transaction property "
1502 "completion-mode = %s",
1503 TransactionActionKind_lookup[s->action->type],
1504 ActionCompletionMode_lookup[s->txn_props->completion_mode]);
1505 return -1;
1506 }
1507 return 0;
1508}
1509
1510static void internal_snapshot_prepare(BlkActionState *common,
1511 Error **errp)
1512{
1513 Error *local_err = NULL;
1514 const char *device;
1515 const char *name;
1516 BlockBackend *blk;
1517 BlockDriverState *bs;
1518 QEMUSnapshotInfo old_sn, *sn;
1519 bool ret;
1520 qemu_timeval tv;
1521 BlockdevSnapshotInternal *internal;
1522 InternalSnapshotState *state;
1523 int ret1;
1524
1525 g_assert(common->action->type ==
1526 TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC);
1527 internal = common->action->u.blockdev_snapshot_internal_sync.data;
1528 state = DO_UPCAST(InternalSnapshotState, common, common);
1529
1530
1531 device = internal->device;
1532 name = internal->name;
1533
1534
1535 if (action_check_completion_mode(common, errp) < 0) {
1536 return;
1537 }
1538
1539 blk = blk_by_name(device);
1540 if (!blk) {
1541 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1542 "Device '%s' not found", device);
1543 return;
1544 }
1545
1546
1547 state->aio_context = blk_get_aio_context(blk);
1548 aio_context_acquire(state->aio_context);
1549
1550 if (!blk_is_available(blk)) {
1551 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1552 return;
1553 }
1554 bs = blk_bs(blk);
1555
1556 state->bs = bs;
1557 bdrv_drained_begin(bs);
1558
1559 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, errp)) {
1560 return;
1561 }
1562
1563 if (bdrv_is_read_only(bs)) {
1564 error_setg(errp, "Device '%s' is read only", device);
1565 return;
1566 }
1567
1568 if (!bdrv_can_snapshot(bs)) {
1569 error_setg(errp, "Block format '%s' used by device '%s' "
1570 "does not support internal snapshots",
1571 bs->drv->format_name, device);
1572 return;
1573 }
1574
1575 if (!strlen(name)) {
1576 error_setg(errp, "Name is empty");
1577 return;
1578 }
1579
1580
1581 ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn,
1582 &local_err);
1583 if (local_err) {
1584 error_propagate(errp, local_err);
1585 return;
1586 } else if (ret) {
1587 error_setg(errp,
1588 "Snapshot with name '%s' already exists on device '%s'",
1589 name, device);
1590 return;
1591 }
1592
1593
1594 sn = &state->sn;
1595 pstrcpy(sn->name, sizeof(sn->name), name);
1596 qemu_gettimeofday(&tv);
1597 sn->date_sec = tv.tv_sec;
1598 sn->date_nsec = tv.tv_usec * 1000;
1599 sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
1600
1601 ret1 = bdrv_snapshot_create(bs, sn);
1602 if (ret1 < 0) {
1603 error_setg_errno(errp, -ret1,
1604 "Failed to create snapshot '%s' on device '%s'",
1605 name, device);
1606 return;
1607 }
1608
1609
1610 state->created = true;
1611}
1612
1613static void internal_snapshot_abort(BlkActionState *common)
1614{
1615 InternalSnapshotState *state =
1616 DO_UPCAST(InternalSnapshotState, common, common);
1617 BlockDriverState *bs = state->bs;
1618 QEMUSnapshotInfo *sn = &state->sn;
1619 Error *local_error = NULL;
1620
1621 if (!state->created) {
1622 return;
1623 }
1624
1625 if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) {
1626 error_reportf_err(local_error,
1627 "Failed to delete snapshot with id '%s' and "
1628 "name '%s' on device '%s' in abort: ",
1629 sn->id_str, sn->name,
1630 bdrv_get_device_name(bs));
1631 }
1632}
1633
1634static void internal_snapshot_clean(BlkActionState *common)
1635{
1636 InternalSnapshotState *state = DO_UPCAST(InternalSnapshotState,
1637 common, common);
1638
1639 if (state->aio_context) {
1640 if (state->bs) {
1641 bdrv_drained_end(state->bs);
1642 }
1643 aio_context_release(state->aio_context);
1644 }
1645}
1646
1647
1648typedef struct ExternalSnapshotState {
1649 BlkActionState common;
1650 BlockDriverState *old_bs;
1651 BlockDriverState *new_bs;
1652 AioContext *aio_context;
1653} ExternalSnapshotState;
1654
1655static void external_snapshot_prepare(BlkActionState *common,
1656 Error **errp)
1657{
1658 int flags = 0, ret;
1659 QDict *options = NULL;
1660 Error *local_err = NULL;
1661
1662 const char *device;
1663 const char *node_name;
1664
1665 const char *snapshot_ref;
1666
1667 const char *new_image_file;
1668 ExternalSnapshotState *state =
1669 DO_UPCAST(ExternalSnapshotState, common, common);
1670 TransactionAction *action = common->action;
1671
1672
1673
1674 switch (action->type) {
1675 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT:
1676 {
1677 BlockdevSnapshot *s = action->u.blockdev_snapshot.data;
1678 device = s->node;
1679 node_name = s->node;
1680 new_image_file = NULL;
1681 snapshot_ref = s->overlay;
1682 }
1683 break;
1684 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC:
1685 {
1686 BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data;
1687 device = s->has_device ? s->device : NULL;
1688 node_name = s->has_node_name ? s->node_name : NULL;
1689 new_image_file = s->snapshot_file;
1690 snapshot_ref = NULL;
1691 }
1692 break;
1693 default:
1694 g_assert_not_reached();
1695 }
1696
1697
1698 if (action_check_completion_mode(common, errp) < 0) {
1699 return;
1700 }
1701
1702 state->old_bs = bdrv_lookup_bs(device, node_name, errp);
1703 if (!state->old_bs) {
1704 return;
1705 }
1706
1707
1708 state->aio_context = bdrv_get_aio_context(state->old_bs);
1709 aio_context_acquire(state->aio_context);
1710 bdrv_drained_begin(state->old_bs);
1711
1712 if (!bdrv_is_inserted(state->old_bs)) {
1713 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1714 return;
1715 }
1716
1717 if (bdrv_op_is_blocked(state->old_bs,
1718 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, errp)) {
1719 return;
1720 }
1721
1722 if (!bdrv_is_read_only(state->old_bs)) {
1723 if (bdrv_flush(state->old_bs)) {
1724 error_setg(errp, QERR_IO_ERROR);
1725 return;
1726 }
1727 }
1728
1729 if (!bdrv_is_first_non_filter(state->old_bs)) {
1730 error_setg(errp, QERR_FEATURE_DISABLED, "snapshot");
1731 return;
1732 }
1733
1734 if (action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC) {
1735 BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data;
1736 const char *format = s->has_format ? s->format : "qcow2";
1737 enum NewImageMode mode;
1738 const char *snapshot_node_name =
1739 s->has_snapshot_node_name ? s->snapshot_node_name : NULL;
1740
1741 if (node_name && !snapshot_node_name) {
1742 error_setg(errp, "New snapshot node name missing");
1743 return;
1744 }
1745
1746 if (snapshot_node_name &&
1747 bdrv_lookup_bs(snapshot_node_name, snapshot_node_name, NULL)) {
1748 error_setg(errp, "New snapshot node name already in use");
1749 return;
1750 }
1751
1752 flags = state->old_bs->open_flags;
1753 flags &= ~(BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING | BDRV_O_COPY_ON_READ);
1754
1755
1756 mode = s->has_mode ? s->mode : NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1757 if (mode != NEW_IMAGE_MODE_EXISTING) {
1758 int64_t size = bdrv_getlength(state->old_bs);
1759 if (size < 0) {
1760 error_setg_errno(errp, -size, "bdrv_getlength failed");
1761 return;
1762 }
1763 bdrv_img_create(new_image_file, format,
1764 state->old_bs->filename,
1765 state->old_bs->drv->format_name,
1766 NULL, size, flags, &local_err, false);
1767 if (local_err) {
1768 error_propagate(errp, local_err);
1769 return;
1770 }
1771 }
1772
1773 options = qdict_new();
1774 if (s->has_snapshot_node_name) {
1775 qdict_put(options, "node-name",
1776 qstring_from_str(snapshot_node_name));
1777 }
1778 qdict_put(options, "driver", qstring_from_str(format));
1779
1780 flags |= BDRV_O_NO_BACKING;
1781 }
1782
1783 assert(state->new_bs == NULL);
1784 ret = bdrv_open(&state->new_bs, new_image_file, snapshot_ref, options,
1785 flags, errp);
1786
1787 if (ret != 0) {
1788 return;
1789 }
1790
1791 if (state->new_bs->blk != NULL) {
1792 error_setg(errp, "The snapshot is already in use by %s",
1793 blk_name(state->new_bs->blk));
1794 return;
1795 }
1796
1797 if (bdrv_op_is_blocked(state->new_bs, BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT,
1798 errp)) {
1799 return;
1800 }
1801
1802 if (state->new_bs->backing != NULL) {
1803 error_setg(errp, "The snapshot already has a backing image");
1804 return;
1805 }
1806
1807 if (!state->new_bs->drv->supports_backing) {
1808 error_setg(errp, "The snapshot does not support backing images");
1809 }
1810}
1811
1812static void external_snapshot_commit(BlkActionState *common)
1813{
1814 ExternalSnapshotState *state =
1815 DO_UPCAST(ExternalSnapshotState, common, common);
1816
1817 bdrv_set_aio_context(state->new_bs, state->aio_context);
1818
1819
1820 bdrv_append(state->new_bs, state->old_bs);
1821
1822
1823
1824 if (!state->old_bs->copy_on_read) {
1825 bdrv_reopen(state->old_bs, state->old_bs->open_flags & ~BDRV_O_RDWR,
1826 NULL);
1827 }
1828}
1829
1830static void external_snapshot_abort(BlkActionState *common)
1831{
1832 ExternalSnapshotState *state =
1833 DO_UPCAST(ExternalSnapshotState, common, common);
1834 if (state->new_bs) {
1835 bdrv_unref(state->new_bs);
1836 }
1837}
1838
1839static void external_snapshot_clean(BlkActionState *common)
1840{
1841 ExternalSnapshotState *state =
1842 DO_UPCAST(ExternalSnapshotState, common, common);
1843 if (state->aio_context) {
1844 bdrv_drained_end(state->old_bs);
1845 aio_context_release(state->aio_context);
1846 }
1847}
1848
1849typedef struct DriveBackupState {
1850 BlkActionState common;
1851 BlockDriverState *bs;
1852 AioContext *aio_context;
1853 BlockJob *job;
1854} DriveBackupState;
1855
1856static void do_drive_backup(const char *device, const char *target,
1857 bool has_format, const char *format,
1858 enum MirrorSyncMode sync,
1859 bool has_mode, enum NewImageMode mode,
1860 bool has_speed, int64_t speed,
1861 bool has_bitmap, const char *bitmap,
1862 bool has_on_source_error,
1863 BlockdevOnError on_source_error,
1864 bool has_on_target_error,
1865 BlockdevOnError on_target_error,
1866 BlockJobTxn *txn, Error **errp);
1867
1868static void drive_backup_prepare(BlkActionState *common, Error **errp)
1869{
1870 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1871 BlockBackend *blk;
1872 DriveBackup *backup;
1873 Error *local_err = NULL;
1874
1875 assert(common->action->type == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
1876 backup = common->action->u.drive_backup.data;
1877
1878 blk = blk_by_name(backup->device);
1879 if (!blk) {
1880 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1881 "Device '%s' not found", backup->device);
1882 return;
1883 }
1884
1885 if (!blk_is_available(blk)) {
1886 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, backup->device);
1887 return;
1888 }
1889
1890
1891 state->aio_context = blk_get_aio_context(blk);
1892 aio_context_acquire(state->aio_context);
1893 bdrv_drained_begin(blk_bs(blk));
1894 state->bs = blk_bs(blk);
1895
1896 do_drive_backup(backup->device, backup->target,
1897 backup->has_format, backup->format,
1898 backup->sync,
1899 backup->has_mode, backup->mode,
1900 backup->has_speed, backup->speed,
1901 backup->has_bitmap, backup->bitmap,
1902 backup->has_on_source_error, backup->on_source_error,
1903 backup->has_on_target_error, backup->on_target_error,
1904 common->block_job_txn, &local_err);
1905 if (local_err) {
1906 error_propagate(errp, local_err);
1907 return;
1908 }
1909
1910 state->job = state->bs->job;
1911}
1912
1913static void drive_backup_abort(BlkActionState *common)
1914{
1915 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1916 BlockDriverState *bs = state->bs;
1917
1918
1919 if (bs && bs->job && bs->job == state->job) {
1920 block_job_cancel_sync(bs->job);
1921 }
1922}
1923
1924static void drive_backup_clean(BlkActionState *common)
1925{
1926 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1927
1928 if (state->aio_context) {
1929 bdrv_drained_end(state->bs);
1930 aio_context_release(state->aio_context);
1931 }
1932}
1933
1934typedef struct BlockdevBackupState {
1935 BlkActionState common;
1936 BlockDriverState *bs;
1937 BlockJob *job;
1938 AioContext *aio_context;
1939} BlockdevBackupState;
1940
1941static void do_blockdev_backup(const char *device, const char *target,
1942 enum MirrorSyncMode sync,
1943 bool has_speed, int64_t speed,
1944 bool has_on_source_error,
1945 BlockdevOnError on_source_error,
1946 bool has_on_target_error,
1947 BlockdevOnError on_target_error,
1948 BlockJobTxn *txn, Error **errp);
1949
1950static void blockdev_backup_prepare(BlkActionState *common, Error **errp)
1951{
1952 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
1953 BlockdevBackup *backup;
1954 BlockBackend *blk, *target;
1955 Error *local_err = NULL;
1956
1957 assert(common->action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP);
1958 backup = common->action->u.blockdev_backup.data;
1959
1960 blk = blk_by_name(backup->device);
1961 if (!blk) {
1962 error_setg(errp, "Device '%s' not found", backup->device);
1963 return;
1964 }
1965
1966 if (!blk_is_available(blk)) {
1967 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, backup->device);
1968 return;
1969 }
1970
1971 target = blk_by_name(backup->target);
1972 if (!target) {
1973 error_setg(errp, "Device '%s' not found", backup->target);
1974 return;
1975 }
1976
1977
1978 state->aio_context = blk_get_aio_context(blk);
1979 if (state->aio_context != blk_get_aio_context(target)) {
1980 state->aio_context = NULL;
1981 error_setg(errp, "Backup between two IO threads is not implemented");
1982 return;
1983 }
1984 aio_context_acquire(state->aio_context);
1985 state->bs = blk_bs(blk);
1986 bdrv_drained_begin(state->bs);
1987
1988 do_blockdev_backup(backup->device, backup->target,
1989 backup->sync,
1990 backup->has_speed, backup->speed,
1991 backup->has_on_source_error, backup->on_source_error,
1992 backup->has_on_target_error, backup->on_target_error,
1993 common->block_job_txn, &local_err);
1994 if (local_err) {
1995 error_propagate(errp, local_err);
1996 return;
1997 }
1998
1999 state->job = state->bs->job;
2000}
2001
2002static void blockdev_backup_abort(BlkActionState *common)
2003{
2004 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
2005 BlockDriverState *bs = state->bs;
2006
2007
2008 if (bs && bs->job && bs->job == state->job) {
2009 block_job_cancel_sync(bs->job);
2010 }
2011}
2012
2013static void blockdev_backup_clean(BlkActionState *common)
2014{
2015 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
2016
2017 if (state->aio_context) {
2018 bdrv_drained_end(state->bs);
2019 aio_context_release(state->aio_context);
2020 }
2021}
2022
2023typedef struct BlockDirtyBitmapState {
2024 BlkActionState common;
2025 BdrvDirtyBitmap *bitmap;
2026 BlockDriverState *bs;
2027 AioContext *aio_context;
2028 HBitmap *backup;
2029 bool prepared;
2030} BlockDirtyBitmapState;
2031
2032static void block_dirty_bitmap_add_prepare(BlkActionState *common,
2033 Error **errp)
2034{
2035 Error *local_err = NULL;
2036 BlockDirtyBitmapAdd *action;
2037 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2038 common, common);
2039
2040 if (action_check_completion_mode(common, errp) < 0) {
2041 return;
2042 }
2043
2044 action = common->action->u.block_dirty_bitmap_add.data;
2045
2046 qmp_block_dirty_bitmap_add(action->node, action->name,
2047 action->has_granularity, action->granularity,
2048 &local_err);
2049
2050 if (!local_err) {
2051 state->prepared = true;
2052 } else {
2053 error_propagate(errp, local_err);
2054 }
2055}
2056
2057static void block_dirty_bitmap_add_abort(BlkActionState *common)
2058{
2059 BlockDirtyBitmapAdd *action;
2060 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2061 common, common);
2062
2063 action = common->action->u.block_dirty_bitmap_add.data;
2064
2065
2066
2067 if (state->prepared) {
2068 qmp_block_dirty_bitmap_remove(action->node, action->name, &error_abort);
2069 }
2070}
2071
2072static void block_dirty_bitmap_clear_prepare(BlkActionState *common,
2073 Error **errp)
2074{
2075 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2076 common, common);
2077 BlockDirtyBitmap *action;
2078
2079 if (action_check_completion_mode(common, errp) < 0) {
2080 return;
2081 }
2082
2083 action = common->action->u.block_dirty_bitmap_clear.data;
2084 state->bitmap = block_dirty_bitmap_lookup(action->node,
2085 action->name,
2086 &state->bs,
2087 &state->aio_context,
2088 errp);
2089 if (!state->bitmap) {
2090 return;
2091 }
2092
2093 if (bdrv_dirty_bitmap_frozen(state->bitmap)) {
2094 error_setg(errp, "Cannot modify a frozen bitmap");
2095 return;
2096 } else if (!bdrv_dirty_bitmap_enabled(state->bitmap)) {
2097 error_setg(errp, "Cannot clear a disabled bitmap");
2098 return;
2099 }
2100
2101 bdrv_clear_dirty_bitmap(state->bitmap, &state->backup);
2102
2103}
2104
2105static void block_dirty_bitmap_clear_abort(BlkActionState *common)
2106{
2107 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2108 common, common);
2109
2110 bdrv_undo_clear_dirty_bitmap(state->bitmap, state->backup);
2111}
2112
2113static void block_dirty_bitmap_clear_commit(BlkActionState *common)
2114{
2115 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2116 common, common);
2117
2118 hbitmap_free(state->backup);
2119}
2120
2121static void block_dirty_bitmap_clear_clean(BlkActionState *common)
2122{
2123 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2124 common, common);
2125
2126 if (state->aio_context) {
2127 aio_context_release(state->aio_context);
2128 }
2129}
2130
2131static void abort_prepare(BlkActionState *common, Error **errp)
2132{
2133 error_setg(errp, "Transaction aborted using Abort action");
2134}
2135
2136static void abort_commit(BlkActionState *common)
2137{
2138 g_assert_not_reached();
2139}
2140
2141static const BlkActionOps actions[] = {
2142 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT] = {
2143 .instance_size = sizeof(ExternalSnapshotState),
2144 .prepare = external_snapshot_prepare,
2145 .commit = external_snapshot_commit,
2146 .abort = external_snapshot_abort,
2147 .clean = external_snapshot_clean,
2148 },
2149 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
2150 .instance_size = sizeof(ExternalSnapshotState),
2151 .prepare = external_snapshot_prepare,
2152 .commit = external_snapshot_commit,
2153 .abort = external_snapshot_abort,
2154 .clean = external_snapshot_clean,
2155 },
2156 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
2157 .instance_size = sizeof(DriveBackupState),
2158 .prepare = drive_backup_prepare,
2159 .abort = drive_backup_abort,
2160 .clean = drive_backup_clean,
2161 },
2162 [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP] = {
2163 .instance_size = sizeof(BlockdevBackupState),
2164 .prepare = blockdev_backup_prepare,
2165 .abort = blockdev_backup_abort,
2166 .clean = blockdev_backup_clean,
2167 },
2168 [TRANSACTION_ACTION_KIND_ABORT] = {
2169 .instance_size = sizeof(BlkActionState),
2170 .prepare = abort_prepare,
2171 .commit = abort_commit,
2172 },
2173 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = {
2174 .instance_size = sizeof(InternalSnapshotState),
2175 .prepare = internal_snapshot_prepare,
2176 .abort = internal_snapshot_abort,
2177 .clean = internal_snapshot_clean,
2178 },
2179 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD] = {
2180 .instance_size = sizeof(BlockDirtyBitmapState),
2181 .prepare = block_dirty_bitmap_add_prepare,
2182 .abort = block_dirty_bitmap_add_abort,
2183 },
2184 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR] = {
2185 .instance_size = sizeof(BlockDirtyBitmapState),
2186 .prepare = block_dirty_bitmap_clear_prepare,
2187 .commit = block_dirty_bitmap_clear_commit,
2188 .abort = block_dirty_bitmap_clear_abort,
2189 .clean = block_dirty_bitmap_clear_clean,
2190 }
2191};
2192
2193
2194
2195
2196
2197static TransactionProperties *get_transaction_properties(
2198 TransactionProperties *props)
2199{
2200 if (!props) {
2201 props = g_new0(TransactionProperties, 1);
2202 }
2203
2204 if (!props->has_completion_mode) {
2205 props->has_completion_mode = true;
2206 props->completion_mode = ACTION_COMPLETION_MODE_INDIVIDUAL;
2207 }
2208
2209 return props;
2210}
2211
2212
2213
2214
2215
2216void qmp_transaction(TransactionActionList *dev_list,
2217 bool has_props,
2218 struct TransactionProperties *props,
2219 Error **errp)
2220{
2221 TransactionActionList *dev_entry = dev_list;
2222 BlockJobTxn *block_job_txn = NULL;
2223 BlkActionState *state, *next;
2224 Error *local_err = NULL;
2225
2226 QSIMPLEQ_HEAD(snap_bdrv_states, BlkActionState) snap_bdrv_states;
2227 QSIMPLEQ_INIT(&snap_bdrv_states);
2228
2229
2230
2231
2232 props = get_transaction_properties(props);
2233 if (props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) {
2234 block_job_txn = block_job_txn_new();
2235 }
2236
2237
2238 bdrv_drain_all();
2239
2240
2241 while (NULL != dev_entry) {
2242 TransactionAction *dev_info = NULL;
2243 const BlkActionOps *ops;
2244
2245 dev_info = dev_entry->value;
2246 dev_entry = dev_entry->next;
2247
2248 assert(dev_info->type < ARRAY_SIZE(actions));
2249
2250 ops = &actions[dev_info->type];
2251 assert(ops->instance_size > 0);
2252
2253 state = g_malloc0(ops->instance_size);
2254 state->ops = ops;
2255 state->action = dev_info;
2256 state->block_job_txn = block_job_txn;
2257 state->txn_props = props;
2258 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
2259
2260 state->ops->prepare(state, &local_err);
2261 if (local_err) {
2262 error_propagate(errp, local_err);
2263 goto delete_and_fail;
2264 }
2265 }
2266
2267 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
2268 if (state->ops->commit) {
2269 state->ops->commit(state);
2270 }
2271 }
2272
2273
2274 goto exit;
2275
2276delete_and_fail:
2277
2278 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
2279 if (state->ops->abort) {
2280 state->ops->abort(state);
2281 }
2282 }
2283exit:
2284 QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
2285 if (state->ops->clean) {
2286 state->ops->clean(state);
2287 }
2288 g_free(state);
2289 }
2290 if (!has_props) {
2291 qapi_free_TransactionProperties(props);
2292 }
2293 block_job_txn_unref(block_job_txn);
2294}
2295
2296void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
2297{
2298 Error *local_err = NULL;
2299
2300 qmp_blockdev_open_tray(device, has_force, force, &local_err);
2301 if (local_err) {
2302 error_propagate(errp, local_err);
2303 return;
2304 }
2305
2306 qmp_x_blockdev_remove_medium(device, errp);
2307}
2308
2309void qmp_block_passwd(bool has_device, const char *device,
2310 bool has_node_name, const char *node_name,
2311 const char *password, Error **errp)
2312{
2313 Error *local_err = NULL;
2314 BlockDriverState *bs;
2315 AioContext *aio_context;
2316
2317 bs = bdrv_lookup_bs(has_device ? device : NULL,
2318 has_node_name ? node_name : NULL,
2319 &local_err);
2320 if (local_err) {
2321 error_propagate(errp, local_err);
2322 return;
2323 }
2324
2325 aio_context = bdrv_get_aio_context(bs);
2326 aio_context_acquire(aio_context);
2327
2328 bdrv_add_key(bs, password, errp);
2329
2330 aio_context_release(aio_context);
2331}
2332
2333void qmp_blockdev_open_tray(const char *device, bool has_force, bool force,
2334 Error **errp)
2335{
2336 BlockBackend *blk;
2337 bool locked;
2338
2339 if (!has_force) {
2340 force = false;
2341 }
2342
2343 blk = blk_by_name(device);
2344 if (!blk) {
2345 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2346 "Device '%s' not found", device);
2347 return;
2348 }
2349
2350 if (!blk_dev_has_removable_media(blk)) {
2351 error_setg(errp, "Device '%s' is not removable", device);
2352 return;
2353 }
2354
2355 if (!blk_dev_has_tray(blk)) {
2356
2357 return;
2358 }
2359
2360 if (blk_dev_is_tray_open(blk)) {
2361 return;
2362 }
2363
2364 locked = blk_dev_is_medium_locked(blk);
2365 if (locked) {
2366 blk_dev_eject_request(blk, force);
2367 }
2368
2369 if (!locked || force) {
2370 blk_dev_change_media_cb(blk, false);
2371 }
2372}
2373
2374void qmp_blockdev_close_tray(const char *device, Error **errp)
2375{
2376 BlockBackend *blk;
2377
2378 blk = blk_by_name(device);
2379 if (!blk) {
2380 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2381 "Device '%s' not found", device);
2382 return;
2383 }
2384
2385 if (!blk_dev_has_removable_media(blk)) {
2386 error_setg(errp, "Device '%s' is not removable", device);
2387 return;
2388 }
2389
2390 if (!blk_dev_has_tray(blk)) {
2391
2392 return;
2393 }
2394
2395 if (!blk_dev_is_tray_open(blk)) {
2396 return;
2397 }
2398
2399 blk_dev_change_media_cb(blk, true);
2400}
2401
2402void qmp_x_blockdev_remove_medium(const char *device, Error **errp)
2403{
2404 BlockBackend *blk;
2405 BlockDriverState *bs;
2406 AioContext *aio_context;
2407 bool has_device;
2408
2409 blk = blk_by_name(device);
2410 if (!blk) {
2411 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2412 "Device '%s' not found", device);
2413 return;
2414 }
2415
2416
2417 has_device = blk_get_attached_dev(blk);
2418
2419 if (has_device && !blk_dev_has_removable_media(blk)) {
2420 error_setg(errp, "Device '%s' is not removable", device);
2421 return;
2422 }
2423
2424 if (has_device && blk_dev_has_tray(blk) && !blk_dev_is_tray_open(blk)) {
2425 error_setg(errp, "Tray of device '%s' is not open", device);
2426 return;
2427 }
2428
2429 bs = blk_bs(blk);
2430 if (!bs) {
2431 return;
2432 }
2433
2434 aio_context = bdrv_get_aio_context(bs);
2435 aio_context_acquire(aio_context);
2436
2437 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_EJECT, errp)) {
2438 goto out;
2439 }
2440
2441 blk_remove_bs(blk);
2442
2443 if (!blk_dev_has_tray(blk)) {
2444
2445
2446
2447
2448 blk_dev_change_media_cb(blk, false);
2449 }
2450
2451out:
2452 aio_context_release(aio_context);
2453}
2454
2455static void qmp_blockdev_insert_anon_medium(const char *device,
2456 BlockDriverState *bs, Error **errp)
2457{
2458 BlockBackend *blk;
2459 bool has_device;
2460
2461 blk = blk_by_name(device);
2462 if (!blk) {
2463 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2464 "Device '%s' not found", device);
2465 return;
2466 }
2467
2468
2469 has_device = blk_get_attached_dev(blk);
2470
2471 if (has_device && !blk_dev_has_removable_media(blk)) {
2472 error_setg(errp, "Device '%s' is not removable", device);
2473 return;
2474 }
2475
2476 if (has_device && blk_dev_has_tray(blk) && !blk_dev_is_tray_open(blk)) {
2477 error_setg(errp, "Tray of device '%s' is not open", device);
2478 return;
2479 }
2480
2481 if (blk_bs(blk)) {
2482 error_setg(errp, "There already is a medium in device '%s'", device);
2483 return;
2484 }
2485
2486 blk_insert_bs(blk, bs);
2487
2488 if (!blk_dev_has_tray(blk)) {
2489
2490
2491
2492
2493
2494 blk_dev_change_media_cb(blk, true);
2495 }
2496}
2497
2498void qmp_x_blockdev_insert_medium(const char *device, const char *node_name,
2499 Error **errp)
2500{
2501 BlockDriverState *bs;
2502
2503 bs = bdrv_find_node(node_name);
2504 if (!bs) {
2505 error_setg(errp, "Node '%s' not found", node_name);
2506 return;
2507 }
2508
2509 if (bs->blk) {
2510 error_setg(errp, "Node '%s' is already in use by '%s'", node_name,
2511 blk_name(bs->blk));
2512 return;
2513 }
2514
2515 qmp_blockdev_insert_anon_medium(device, bs, errp);
2516}
2517
2518void qmp_blockdev_change_medium(const char *device, const char *filename,
2519 bool has_format, const char *format,
2520 bool has_read_only,
2521 BlockdevChangeReadOnlyMode read_only,
2522 Error **errp)
2523{
2524 BlockBackend *blk;
2525 BlockDriverState *medium_bs = NULL;
2526 int bdrv_flags, ret;
2527 QDict *options = NULL;
2528 Error *err = NULL;
2529
2530 blk = blk_by_name(device);
2531 if (!blk) {
2532 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2533 "Device '%s' not found", device);
2534 goto fail;
2535 }
2536
2537 if (blk_bs(blk)) {
2538 blk_update_root_state(blk);
2539 }
2540
2541 bdrv_flags = blk_get_open_flags_from_root_state(blk);
2542 bdrv_flags &= ~(BDRV_O_TEMPORARY | BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING |
2543 BDRV_O_PROTOCOL);
2544
2545 if (!has_read_only) {
2546 read_only = BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN;
2547 }
2548
2549 switch (read_only) {
2550 case BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN:
2551 break;
2552
2553 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_ONLY:
2554 bdrv_flags &= ~BDRV_O_RDWR;
2555 break;
2556
2557 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_WRITE:
2558 bdrv_flags |= BDRV_O_RDWR;
2559 break;
2560
2561 default:
2562 abort();
2563 }
2564
2565 if (has_format) {
2566 options = qdict_new();
2567 qdict_put(options, "driver", qstring_from_str(format));
2568 }
2569
2570 assert(!medium_bs);
2571 ret = bdrv_open(&medium_bs, filename, NULL, options, bdrv_flags, errp);
2572 if (ret < 0) {
2573 goto fail;
2574 }
2575
2576 blk_apply_root_state(blk, medium_bs);
2577
2578 bdrv_add_key(medium_bs, NULL, &err);
2579 if (err) {
2580 error_propagate(errp, err);
2581 goto fail;
2582 }
2583
2584 qmp_blockdev_open_tray(device, false, false, &err);
2585 if (err) {
2586 error_propagate(errp, err);
2587 goto fail;
2588 }
2589
2590 qmp_x_blockdev_remove_medium(device, &err);
2591 if (err) {
2592 error_propagate(errp, err);
2593 goto fail;
2594 }
2595
2596 qmp_blockdev_insert_anon_medium(device, medium_bs, &err);
2597 if (err) {
2598 error_propagate(errp, err);
2599 goto fail;
2600 }
2601
2602 qmp_blockdev_close_tray(device, errp);
2603
2604fail:
2605
2606
2607
2608 bdrv_unref(medium_bs);
2609}
2610
2611
2612void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
2613 int64_t bps_wr,
2614 int64_t iops,
2615 int64_t iops_rd,
2616 int64_t iops_wr,
2617 bool has_bps_max,
2618 int64_t bps_max,
2619 bool has_bps_rd_max,
2620 int64_t bps_rd_max,
2621 bool has_bps_wr_max,
2622 int64_t bps_wr_max,
2623 bool has_iops_max,
2624 int64_t iops_max,
2625 bool has_iops_rd_max,
2626 int64_t iops_rd_max,
2627 bool has_iops_wr_max,
2628 int64_t iops_wr_max,
2629 bool has_bps_max_length,
2630 int64_t bps_max_length,
2631 bool has_bps_rd_max_length,
2632 int64_t bps_rd_max_length,
2633 bool has_bps_wr_max_length,
2634 int64_t bps_wr_max_length,
2635 bool has_iops_max_length,
2636 int64_t iops_max_length,
2637 bool has_iops_rd_max_length,
2638 int64_t iops_rd_max_length,
2639 bool has_iops_wr_max_length,
2640 int64_t iops_wr_max_length,
2641 bool has_iops_size,
2642 int64_t iops_size,
2643 bool has_group,
2644 const char *group, Error **errp)
2645{
2646 ThrottleConfig cfg;
2647 BlockDriverState *bs;
2648 BlockBackend *blk;
2649 AioContext *aio_context;
2650
2651 blk = blk_by_name(device);
2652 if (!blk) {
2653 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2654 "Device '%s' not found", device);
2655 return;
2656 }
2657
2658 aio_context = blk_get_aio_context(blk);
2659 aio_context_acquire(aio_context);
2660
2661 bs = blk_bs(blk);
2662 if (!bs) {
2663 error_setg(errp, "Device '%s' has no medium", device);
2664 goto out;
2665 }
2666
2667
2668 assert(QLIST_FIRST(&bs->parents));
2669 if (QLIST_NEXT(QLIST_FIRST(&bs->parents), next_parent)) {
2670 error_setg(errp, "Cannot throttle device with multiple parents");
2671 goto out;
2672 }
2673
2674 throttle_config_init(&cfg);
2675 cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps;
2676 cfg.buckets[THROTTLE_BPS_READ].avg = bps_rd;
2677 cfg.buckets[THROTTLE_BPS_WRITE].avg = bps_wr;
2678
2679 cfg.buckets[THROTTLE_OPS_TOTAL].avg = iops;
2680 cfg.buckets[THROTTLE_OPS_READ].avg = iops_rd;
2681 cfg.buckets[THROTTLE_OPS_WRITE].avg = iops_wr;
2682
2683 if (has_bps_max) {
2684 cfg.buckets[THROTTLE_BPS_TOTAL].max = bps_max;
2685 }
2686 if (has_bps_rd_max) {
2687 cfg.buckets[THROTTLE_BPS_READ].max = bps_rd_max;
2688 }
2689 if (has_bps_wr_max) {
2690 cfg.buckets[THROTTLE_BPS_WRITE].max = bps_wr_max;
2691 }
2692 if (has_iops_max) {
2693 cfg.buckets[THROTTLE_OPS_TOTAL].max = iops_max;
2694 }
2695 if (has_iops_rd_max) {
2696 cfg.buckets[THROTTLE_OPS_READ].max = iops_rd_max;
2697 }
2698 if (has_iops_wr_max) {
2699 cfg.buckets[THROTTLE_OPS_WRITE].max = iops_wr_max;
2700 }
2701
2702 if (has_bps_max_length) {
2703 cfg.buckets[THROTTLE_BPS_TOTAL].burst_length = bps_max_length;
2704 }
2705 if (has_bps_rd_max_length) {
2706 cfg.buckets[THROTTLE_BPS_READ].burst_length = bps_rd_max_length;
2707 }
2708 if (has_bps_wr_max_length) {
2709 cfg.buckets[THROTTLE_BPS_WRITE].burst_length = bps_wr_max_length;
2710 }
2711 if (has_iops_max_length) {
2712 cfg.buckets[THROTTLE_OPS_TOTAL].burst_length = iops_max_length;
2713 }
2714 if (has_iops_rd_max_length) {
2715 cfg.buckets[THROTTLE_OPS_READ].burst_length = iops_rd_max_length;
2716 }
2717 if (has_iops_wr_max_length) {
2718 cfg.buckets[THROTTLE_OPS_WRITE].burst_length = iops_wr_max_length;
2719 }
2720
2721 if (has_iops_size) {
2722 cfg.op_size = iops_size;
2723 }
2724
2725 if (!throttle_is_valid(&cfg, errp)) {
2726 goto out;
2727 }
2728
2729 if (throttle_enabled(&cfg)) {
2730
2731
2732 if (!bs->throttle_state) {
2733 bdrv_io_limits_enable(bs, has_group ? group : device);
2734 } else if (has_group) {
2735 bdrv_io_limits_update_group(bs, group);
2736 }
2737
2738 bdrv_set_io_limits(bs, &cfg);
2739 } else if (bs->throttle_state) {
2740
2741 bdrv_io_limits_disable(bs);
2742 }
2743
2744out:
2745 aio_context_release(aio_context);
2746}
2747
2748void qmp_block_dirty_bitmap_add(const char *node, const char *name,
2749 bool has_granularity, uint32_t granularity,
2750 Error **errp)
2751{
2752 AioContext *aio_context;
2753 BlockDriverState *bs;
2754
2755 if (!name || name[0] == '\0') {
2756 error_setg(errp, "Bitmap name cannot be empty");
2757 return;
2758 }
2759
2760 bs = bdrv_lookup_bs(node, node, errp);
2761 if (!bs) {
2762 return;
2763 }
2764
2765 aio_context = bdrv_get_aio_context(bs);
2766 aio_context_acquire(aio_context);
2767
2768 if (has_granularity) {
2769 if (granularity < 512 || !is_power_of_2(granularity)) {
2770 error_setg(errp, "Granularity must be power of 2 "
2771 "and at least 512");
2772 goto out;
2773 }
2774 } else {
2775
2776 granularity = bdrv_get_default_bitmap_granularity(bs);
2777 }
2778
2779 bdrv_create_dirty_bitmap(bs, granularity, name, errp);
2780
2781 out:
2782 aio_context_release(aio_context);
2783}
2784
2785void qmp_block_dirty_bitmap_remove(const char *node, const char *name,
2786 Error **errp)
2787{
2788 AioContext *aio_context;
2789 BlockDriverState *bs;
2790 BdrvDirtyBitmap *bitmap;
2791
2792 bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp);
2793 if (!bitmap || !bs) {
2794 return;
2795 }
2796
2797 if (bdrv_dirty_bitmap_frozen(bitmap)) {
2798 error_setg(errp,
2799 "Bitmap '%s' is currently frozen and cannot be removed",
2800 name);
2801 goto out;
2802 }
2803 bdrv_dirty_bitmap_make_anon(bitmap);
2804 bdrv_release_dirty_bitmap(bs, bitmap);
2805
2806 out:
2807 aio_context_release(aio_context);
2808}
2809
2810
2811
2812
2813
2814void qmp_block_dirty_bitmap_clear(const char *node, const char *name,
2815 Error **errp)
2816{
2817 AioContext *aio_context;
2818 BdrvDirtyBitmap *bitmap;
2819 BlockDriverState *bs;
2820
2821 bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp);
2822 if (!bitmap || !bs) {
2823 return;
2824 }
2825
2826 if (bdrv_dirty_bitmap_frozen(bitmap)) {
2827 error_setg(errp,
2828 "Bitmap '%s' is currently frozen and cannot be modified",
2829 name);
2830 goto out;
2831 } else if (!bdrv_dirty_bitmap_enabled(bitmap)) {
2832 error_setg(errp,
2833 "Bitmap '%s' is currently disabled and cannot be cleared",
2834 name);
2835 goto out;
2836 }
2837
2838 bdrv_clear_dirty_bitmap(bitmap, NULL);
2839
2840 out:
2841 aio_context_release(aio_context);
2842}
2843
2844void hmp_drive_del(Monitor *mon, const QDict *qdict)
2845{
2846 const char *id = qdict_get_str(qdict, "id");
2847 BlockBackend *blk;
2848 BlockDriverState *bs;
2849 AioContext *aio_context;
2850 Error *local_err = NULL;
2851
2852 bs = bdrv_find_node(id);
2853 if (bs) {
2854 qmp_x_blockdev_del(false, NULL, true, id, &local_err);
2855 if (local_err) {
2856 error_report_err(local_err);
2857 }
2858 return;
2859 }
2860
2861 blk = blk_by_name(id);
2862 if (!blk) {
2863 error_report("Device '%s' not found", id);
2864 return;
2865 }
2866
2867 if (!blk_legacy_dinfo(blk)) {
2868 error_report("Deleting device added with blockdev-add"
2869 " is not supported");
2870 return;
2871 }
2872
2873 aio_context = blk_get_aio_context(blk);
2874 aio_context_acquire(aio_context);
2875
2876 bs = blk_bs(blk);
2877 if (bs) {
2878 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) {
2879 error_report_err(local_err);
2880 aio_context_release(aio_context);
2881 return;
2882 }
2883
2884 blk_remove_bs(blk);
2885 }
2886
2887
2888 monitor_remove_blk(blk);
2889
2890
2891
2892
2893 if (blk_get_attached_dev(blk)) {
2894
2895 blk_set_on_error(blk, BLOCKDEV_ON_ERROR_REPORT,
2896 BLOCKDEV_ON_ERROR_REPORT);
2897 } else {
2898 blk_unref(blk);
2899 }
2900
2901 aio_context_release(aio_context);
2902}
2903
2904void qmp_block_resize(bool has_device, const char *device,
2905 bool has_node_name, const char *node_name,
2906 int64_t size, Error **errp)
2907{
2908 Error *local_err = NULL;
2909 BlockDriverState *bs;
2910 AioContext *aio_context;
2911 int ret;
2912
2913 bs = bdrv_lookup_bs(has_device ? device : NULL,
2914 has_node_name ? node_name : NULL,
2915 &local_err);
2916 if (local_err) {
2917 error_propagate(errp, local_err);
2918 return;
2919 }
2920
2921 aio_context = bdrv_get_aio_context(bs);
2922 aio_context_acquire(aio_context);
2923
2924 if (!bdrv_is_first_non_filter(bs)) {
2925 error_setg(errp, QERR_FEATURE_DISABLED, "resize");
2926 goto out;
2927 }
2928
2929 if (size < 0) {
2930 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
2931 goto out;
2932 }
2933
2934 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) {
2935 error_setg(errp, QERR_DEVICE_IN_USE, device);
2936 goto out;
2937 }
2938
2939
2940 bdrv_drain_all();
2941
2942 ret = bdrv_truncate(bs, size);
2943 switch (ret) {
2944 case 0:
2945 break;
2946 case -ENOMEDIUM:
2947 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
2948 break;
2949 case -ENOTSUP:
2950 error_setg(errp, QERR_UNSUPPORTED);
2951 break;
2952 case -EACCES:
2953 error_setg(errp, "Device '%s' is read only", device);
2954 break;
2955 case -EBUSY:
2956 error_setg(errp, QERR_DEVICE_IN_USE, device);
2957 break;
2958 default:
2959 error_setg_errno(errp, -ret, "Could not resize");
2960 break;
2961 }
2962
2963out:
2964 aio_context_release(aio_context);
2965}
2966
2967static void block_job_cb(void *opaque, int ret)
2968{
2969
2970
2971
2972
2973
2974 BlockDriverState *bs = opaque;
2975 const char *msg = NULL;
2976
2977 trace_block_job_cb(bs, bs->job, ret);
2978
2979 assert(bs->job);
2980
2981 if (ret < 0) {
2982 msg = strerror(-ret);
2983 }
2984
2985 if (block_job_is_cancelled(bs->job)) {
2986 block_job_event_cancelled(bs->job);
2987 } else {
2988 block_job_event_completed(bs->job, msg);
2989 }
2990}
2991
2992void qmp_block_stream(const char *device,
2993 bool has_base, const char *base,
2994 bool has_backing_file, const char *backing_file,
2995 bool has_speed, int64_t speed,
2996 bool has_on_error, BlockdevOnError on_error,
2997 Error **errp)
2998{
2999 BlockBackend *blk;
3000 BlockDriverState *bs;
3001 BlockDriverState *base_bs = NULL;
3002 AioContext *aio_context;
3003 Error *local_err = NULL;
3004 const char *base_name = NULL;
3005
3006 if (!has_on_error) {
3007 on_error = BLOCKDEV_ON_ERROR_REPORT;
3008 }
3009
3010 blk = blk_by_name(device);
3011 if (!blk) {
3012 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3013 "Device '%s' not found", device);
3014 return;
3015 }
3016
3017 aio_context = blk_get_aio_context(blk);
3018 aio_context_acquire(aio_context);
3019
3020 if (!blk_is_available(blk)) {
3021 error_setg(errp, "Device '%s' has no medium", device);
3022 goto out;
3023 }
3024 bs = blk_bs(blk);
3025
3026 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_STREAM, errp)) {
3027 goto out;
3028 }
3029
3030 if (has_base) {
3031 base_bs = bdrv_find_backing_image(bs, base);
3032 if (base_bs == NULL) {
3033 error_setg(errp, QERR_BASE_NOT_FOUND, base);
3034 goto out;
3035 }
3036 assert(bdrv_get_aio_context(base_bs) == aio_context);
3037 base_name = base;
3038 }
3039
3040
3041
3042 if (base_bs == NULL && has_backing_file) {
3043 error_setg(errp, "backing file specified, but streaming the "
3044 "entire chain");
3045 goto out;
3046 }
3047
3048
3049 base_name = has_backing_file ? backing_file : base_name;
3050
3051 stream_start(bs, base_bs, base_name, has_speed ? speed : 0,
3052 on_error, block_job_cb, bs, &local_err);
3053 if (local_err) {
3054 error_propagate(errp, local_err);
3055 goto out;
3056 }
3057
3058 trace_qmp_block_stream(bs, bs->job);
3059
3060out:
3061 aio_context_release(aio_context);
3062}
3063
3064void qmp_block_commit(const char *device,
3065 bool has_base, const char *base,
3066 bool has_top, const char *top,
3067 bool has_backing_file, const char *backing_file,
3068 bool has_speed, int64_t speed,
3069 Error **errp)
3070{
3071 BlockBackend *blk;
3072 BlockDriverState *bs;
3073 BlockDriverState *base_bs, *top_bs;
3074 AioContext *aio_context;
3075 Error *local_err = NULL;
3076
3077
3078
3079 BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
3080
3081 if (!has_speed) {
3082 speed = 0;
3083 }
3084
3085
3086
3087
3088
3089
3090 blk = blk_by_name(device);
3091 if (!blk) {
3092 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3093 "Device '%s' not found", device);
3094 return;
3095 }
3096
3097 aio_context = blk_get_aio_context(blk);
3098 aio_context_acquire(aio_context);
3099
3100 if (!blk_is_available(blk)) {
3101 error_setg(errp, "Device '%s' has no medium", device);
3102 goto out;
3103 }
3104 bs = blk_bs(blk);
3105
3106 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, errp)) {
3107 goto out;
3108 }
3109
3110
3111 top_bs = bs;
3112
3113 if (has_top && top) {
3114 if (strcmp(bs->filename, top) != 0) {
3115 top_bs = bdrv_find_backing_image(bs, top);
3116 }
3117 }
3118
3119 if (top_bs == NULL) {
3120 error_setg(errp, "Top image file %s not found", top ? top : "NULL");
3121 goto out;
3122 }
3123
3124 assert(bdrv_get_aio_context(top_bs) == aio_context);
3125
3126 if (has_base && base) {
3127 base_bs = bdrv_find_backing_image(top_bs, base);
3128 } else {
3129 base_bs = bdrv_find_base(top_bs);
3130 }
3131
3132 if (base_bs == NULL) {
3133 error_setg(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
3134 goto out;
3135 }
3136
3137 assert(bdrv_get_aio_context(base_bs) == aio_context);
3138
3139 if (bdrv_op_is_blocked(base_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
3140 goto out;
3141 }
3142
3143
3144 if (top_bs == base_bs) {
3145 error_setg(errp, "cannot commit an image into itself");
3146 goto out;
3147 }
3148
3149 if (top_bs == bs) {
3150 if (has_backing_file) {
3151 error_setg(errp, "'backing-file' specified,"
3152 " but 'top' is the active layer");
3153 goto out;
3154 }
3155 commit_active_start(bs, base_bs, speed, on_error, block_job_cb,
3156 bs, &local_err);
3157 } else {
3158 commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs,
3159 has_backing_file ? backing_file : NULL, &local_err);
3160 }
3161 if (local_err != NULL) {
3162 error_propagate(errp, local_err);
3163 goto out;
3164 }
3165
3166out:
3167 aio_context_release(aio_context);
3168}
3169
3170static void do_drive_backup(const char *device, const char *target,
3171 bool has_format, const char *format,
3172 enum MirrorSyncMode sync,
3173 bool has_mode, enum NewImageMode mode,
3174 bool has_speed, int64_t speed,
3175 bool has_bitmap, const char *bitmap,
3176 bool has_on_source_error,
3177 BlockdevOnError on_source_error,
3178 bool has_on_target_error,
3179 BlockdevOnError on_target_error,
3180 BlockJobTxn *txn, Error **errp)
3181{
3182 BlockBackend *blk;
3183 BlockDriverState *bs;
3184 BlockDriverState *target_bs;
3185 BlockDriverState *source = NULL;
3186 BdrvDirtyBitmap *bmap = NULL;
3187 AioContext *aio_context;
3188 QDict *options = NULL;
3189 Error *local_err = NULL;
3190 int flags;
3191 int64_t size;
3192 int ret;
3193
3194 if (!has_speed) {
3195 speed = 0;
3196 }
3197 if (!has_on_source_error) {
3198 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
3199 }
3200 if (!has_on_target_error) {
3201 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3202 }
3203 if (!has_mode) {
3204 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
3205 }
3206
3207 blk = blk_by_name(device);
3208 if (!blk) {
3209 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3210 "Device '%s' not found", device);
3211 return;
3212 }
3213
3214 aio_context = blk_get_aio_context(blk);
3215 aio_context_acquire(aio_context);
3216
3217
3218
3219 if (!blk_is_available(blk)) {
3220 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
3221 goto out;
3222 }
3223 bs = blk_bs(blk);
3224
3225 if (!has_format) {
3226 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
3227 }
3228
3229
3230 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
3231 goto out;
3232 }
3233
3234 flags = bs->open_flags | BDRV_O_RDWR;
3235
3236
3237
3238 if (sync == MIRROR_SYNC_MODE_TOP) {
3239 source = backing_bs(bs);
3240 if (!source) {
3241 sync = MIRROR_SYNC_MODE_FULL;
3242 }
3243 }
3244 if (sync == MIRROR_SYNC_MODE_NONE) {
3245 source = bs;
3246 }
3247
3248 size = bdrv_getlength(bs);
3249 if (size < 0) {
3250 error_setg_errno(errp, -size, "bdrv_getlength failed");
3251 goto out;
3252 }
3253
3254 if (mode != NEW_IMAGE_MODE_EXISTING) {
3255 assert(format);
3256 if (source) {
3257 bdrv_img_create(target, format, source->filename,
3258 source->drv->format_name, NULL,
3259 size, flags, &local_err, false);
3260 } else {
3261 bdrv_img_create(target, format, NULL, NULL, NULL,
3262 size, flags, &local_err, false);
3263 }
3264 }
3265
3266 if (local_err) {
3267 error_propagate(errp, local_err);
3268 goto out;
3269 }
3270
3271 if (format) {
3272 options = qdict_new();
3273 qdict_put(options, "driver", qstring_from_str(format));
3274 }
3275
3276 target_bs = NULL;
3277 ret = bdrv_open(&target_bs, target, NULL, options, flags, &local_err);
3278 if (ret < 0) {
3279 error_propagate(errp, local_err);
3280 goto out;
3281 }
3282
3283 bdrv_set_aio_context(target_bs, aio_context);
3284
3285 if (has_bitmap) {
3286 bmap = bdrv_find_dirty_bitmap(bs, bitmap);
3287 if (!bmap) {
3288 error_setg(errp, "Bitmap '%s' could not be found", bitmap);
3289 bdrv_unref(target_bs);
3290 goto out;
3291 }
3292 }
3293
3294 backup_start(bs, target_bs, speed, sync, bmap,
3295 on_source_error, on_target_error,
3296 block_job_cb, bs, txn, &local_err);
3297 if (local_err != NULL) {
3298 bdrv_unref(target_bs);
3299 error_propagate(errp, local_err);
3300 goto out;
3301 }
3302
3303out:
3304 aio_context_release(aio_context);
3305}
3306
3307void qmp_drive_backup(const char *device, const char *target,
3308 bool has_format, const char *format,
3309 enum MirrorSyncMode sync,
3310 bool has_mode, enum NewImageMode mode,
3311 bool has_speed, int64_t speed,
3312 bool has_bitmap, const char *bitmap,
3313 bool has_on_source_error, BlockdevOnError on_source_error,
3314 bool has_on_target_error, BlockdevOnError on_target_error,
3315 Error **errp)
3316{
3317 return do_drive_backup(device, target, has_format, format, sync,
3318 has_mode, mode, has_speed, speed,
3319 has_bitmap, bitmap,
3320 has_on_source_error, on_source_error,
3321 has_on_target_error, on_target_error,
3322 NULL, errp);
3323}
3324
3325BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp)
3326{
3327 return bdrv_named_nodes_list(errp);
3328}
3329
3330void do_blockdev_backup(const char *device, const char *target,
3331 enum MirrorSyncMode sync,
3332 bool has_speed, int64_t speed,
3333 bool has_on_source_error,
3334 BlockdevOnError on_source_error,
3335 bool has_on_target_error,
3336 BlockdevOnError on_target_error,
3337 BlockJobTxn *txn, Error **errp)
3338{
3339 BlockBackend *blk, *target_blk;
3340 BlockDriverState *bs;
3341 BlockDriverState *target_bs;
3342 Error *local_err = NULL;
3343 AioContext *aio_context;
3344
3345 if (!has_speed) {
3346 speed = 0;
3347 }
3348 if (!has_on_source_error) {
3349 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
3350 }
3351 if (!has_on_target_error) {
3352 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3353 }
3354
3355 blk = blk_by_name(device);
3356 if (!blk) {
3357 error_setg(errp, "Device '%s' not found", device);
3358 return;
3359 }
3360
3361 aio_context = blk_get_aio_context(blk);
3362 aio_context_acquire(aio_context);
3363
3364 if (!blk_is_available(blk)) {
3365 error_setg(errp, "Device '%s' has no medium", device);
3366 goto out;
3367 }
3368 bs = blk_bs(blk);
3369
3370 target_blk = blk_by_name(target);
3371 if (!target_blk) {
3372 error_setg(errp, "Device '%s' not found", target);
3373 goto out;
3374 }
3375
3376 if (!blk_is_available(target_blk)) {
3377 error_setg(errp, "Device '%s' has no medium", target);
3378 goto out;
3379 }
3380 target_bs = blk_bs(target_blk);
3381
3382 bdrv_ref(target_bs);
3383 bdrv_set_aio_context(target_bs, aio_context);
3384 backup_start(bs, target_bs, speed, sync, NULL, on_source_error,
3385 on_target_error, block_job_cb, bs, txn, &local_err);
3386 if (local_err != NULL) {
3387 bdrv_unref(target_bs);
3388 error_propagate(errp, local_err);
3389 }
3390out:
3391 aio_context_release(aio_context);
3392}
3393
3394void qmp_blockdev_backup(const char *device, const char *target,
3395 enum MirrorSyncMode sync,
3396 bool has_speed, int64_t speed,
3397 bool has_on_source_error,
3398 BlockdevOnError on_source_error,
3399 bool has_on_target_error,
3400 BlockdevOnError on_target_error,
3401 Error **errp)
3402{
3403 do_blockdev_backup(device, target, sync, has_speed, speed,
3404 has_on_source_error, on_source_error,
3405 has_on_target_error, on_target_error,
3406 NULL, errp);
3407}
3408
3409
3410
3411
3412static void blockdev_mirror_common(BlockDriverState *bs,
3413 BlockDriverState *target,
3414 bool has_replaces, const char *replaces,
3415 enum MirrorSyncMode sync,
3416 bool has_speed, int64_t speed,
3417 bool has_granularity, uint32_t granularity,
3418 bool has_buf_size, int64_t buf_size,
3419 bool has_on_source_error,
3420 BlockdevOnError on_source_error,
3421 bool has_on_target_error,
3422 BlockdevOnError on_target_error,
3423 bool has_unmap, bool unmap,
3424 Error **errp)
3425{
3426
3427 if (!has_speed) {
3428 speed = 0;
3429 }
3430 if (!has_on_source_error) {
3431 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
3432 }
3433 if (!has_on_target_error) {
3434 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3435 }
3436 if (!has_granularity) {
3437 granularity = 0;
3438 }
3439 if (!has_buf_size) {
3440 buf_size = 0;
3441 }
3442 if (!has_unmap) {
3443 unmap = true;
3444 }
3445
3446 if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
3447 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
3448 "a value in range [512B, 64MB]");
3449 return;
3450 }
3451 if (granularity & (granularity - 1)) {
3452 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
3453 "power of 2");
3454 return;
3455 }
3456
3457 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) {
3458 return;
3459 }
3460 if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_MIRROR_TARGET, errp)) {
3461 return;
3462 }
3463 if (target->blk) {
3464 error_setg(errp, "Cannot mirror to an attached block device");
3465 return;
3466 }
3467
3468 if (!bs->backing && sync == MIRROR_SYNC_MODE_TOP) {
3469 sync = MIRROR_SYNC_MODE_FULL;
3470 }
3471
3472
3473
3474
3475 mirror_start(bs, target,
3476 has_replaces ? replaces : NULL,
3477 speed, granularity, buf_size, sync,
3478 on_source_error, on_target_error, unmap,
3479 block_job_cb, bs, errp);
3480}
3481
3482void qmp_drive_mirror(const char *device, const char *target,
3483 bool has_format, const char *format,
3484 bool has_node_name, const char *node_name,
3485 bool has_replaces, const char *replaces,
3486 enum MirrorSyncMode sync,
3487 bool has_mode, enum NewImageMode mode,
3488 bool has_speed, int64_t speed,
3489 bool has_granularity, uint32_t granularity,
3490 bool has_buf_size, int64_t buf_size,
3491 bool has_on_source_error, BlockdevOnError on_source_error,
3492 bool has_on_target_error, BlockdevOnError on_target_error,
3493 bool has_unmap, bool unmap,
3494 Error **errp)
3495{
3496 BlockDriverState *bs;
3497 BlockBackend *blk;
3498 BlockDriverState *source, *target_bs;
3499 AioContext *aio_context;
3500 Error *local_err = NULL;
3501 QDict *options = NULL;
3502 int flags;
3503 int64_t size;
3504 int ret;
3505
3506 blk = blk_by_name(device);
3507 if (!blk) {
3508 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3509 "Device '%s' not found", device);
3510 return;
3511 }
3512
3513 aio_context = blk_get_aio_context(blk);
3514 aio_context_acquire(aio_context);
3515
3516 if (!blk_is_available(blk)) {
3517 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
3518 goto out;
3519 }
3520 bs = blk_bs(blk);
3521 if (!has_mode) {
3522 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
3523 }
3524
3525 if (!has_format) {
3526 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
3527 }
3528
3529 flags = bs->open_flags | BDRV_O_RDWR;
3530 source = backing_bs(bs);
3531 if (!source && sync == MIRROR_SYNC_MODE_TOP) {
3532 sync = MIRROR_SYNC_MODE_FULL;
3533 }
3534 if (sync == MIRROR_SYNC_MODE_NONE) {
3535 source = bs;
3536 }
3537
3538 size = bdrv_getlength(bs);
3539 if (size < 0) {
3540 error_setg_errno(errp, -size, "bdrv_getlength failed");
3541 goto out;
3542 }
3543
3544 if (has_replaces) {
3545 BlockDriverState *to_replace_bs;
3546 AioContext *replace_aio_context;
3547 int64_t replace_size;
3548
3549 if (!has_node_name) {
3550 error_setg(errp, "a node-name must be provided when replacing a"
3551 " named node of the graph");
3552 goto out;
3553 }
3554
3555 to_replace_bs = check_to_replace_node(bs, replaces, &local_err);
3556
3557 if (!to_replace_bs) {
3558 error_propagate(errp, local_err);
3559 goto out;
3560 }
3561
3562 replace_aio_context = bdrv_get_aio_context(to_replace_bs);
3563 aio_context_acquire(replace_aio_context);
3564 replace_size = bdrv_getlength(to_replace_bs);
3565 aio_context_release(replace_aio_context);
3566
3567 if (size != replace_size) {
3568 error_setg(errp, "cannot replace image with a mirror image of "
3569 "different size");
3570 goto out;
3571 }
3572 }
3573
3574 if ((sync == MIRROR_SYNC_MODE_FULL || !source)
3575 && mode != NEW_IMAGE_MODE_EXISTING)
3576 {
3577
3578 assert(format);
3579 bdrv_img_create(target, format,
3580 NULL, NULL, NULL, size, flags, &local_err, false);
3581 } else {
3582 switch (mode) {
3583 case NEW_IMAGE_MODE_EXISTING:
3584 break;
3585 case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
3586
3587 bdrv_img_create(target, format,
3588 source->filename,
3589 source->drv->format_name,
3590 NULL, size, flags, &local_err, false);
3591 break;
3592 default:
3593 abort();
3594 }
3595 }
3596
3597 if (local_err) {
3598 error_propagate(errp, local_err);
3599 goto out;
3600 }
3601
3602 options = qdict_new();
3603 if (has_node_name) {
3604 qdict_put(options, "node-name", qstring_from_str(node_name));
3605 }
3606 if (format) {
3607 qdict_put(options, "driver", qstring_from_str(format));
3608 }
3609
3610
3611
3612
3613 target_bs = NULL;
3614 ret = bdrv_open(&target_bs, target, NULL, options,
3615 flags | BDRV_O_NO_BACKING, &local_err);
3616 if (ret < 0) {
3617 error_propagate(errp, local_err);
3618 goto out;
3619 }
3620
3621 bdrv_set_aio_context(target_bs, aio_context);
3622
3623 blockdev_mirror_common(bs, target_bs,
3624 has_replaces, replaces, sync,
3625 has_speed, speed,
3626 has_granularity, granularity,
3627 has_buf_size, buf_size,
3628 has_on_source_error, on_source_error,
3629 has_on_target_error, on_target_error,
3630 has_unmap, unmap,
3631 &local_err);
3632 if (local_err) {
3633 error_propagate(errp, local_err);
3634 bdrv_unref(target_bs);
3635 }
3636out:
3637 aio_context_release(aio_context);
3638}
3639
3640void qmp_blockdev_mirror(const char *device, const char *target,
3641 bool has_replaces, const char *replaces,
3642 MirrorSyncMode sync,
3643 bool has_speed, int64_t speed,
3644 bool has_granularity, uint32_t granularity,
3645 bool has_buf_size, int64_t buf_size,
3646 bool has_on_source_error,
3647 BlockdevOnError on_source_error,
3648 bool has_on_target_error,
3649 BlockdevOnError on_target_error,
3650 Error **errp)
3651{
3652 BlockDriverState *bs;
3653 BlockBackend *blk;
3654 BlockDriverState *target_bs;
3655 AioContext *aio_context;
3656 Error *local_err = NULL;
3657
3658 blk = blk_by_name(device);
3659 if (!blk) {
3660 error_setg(errp, "Device '%s' not found", device);
3661 return;
3662 }
3663 bs = blk_bs(blk);
3664
3665 if (!bs) {
3666 error_setg(errp, "Device '%s' has no media", device);
3667 return;
3668 }
3669
3670 target_bs = bdrv_lookup_bs(target, target, errp);
3671 if (!target_bs) {
3672 return;
3673 }
3674
3675 aio_context = bdrv_get_aio_context(bs);
3676 aio_context_acquire(aio_context);
3677
3678 bdrv_ref(target_bs);
3679 bdrv_set_aio_context(target_bs, aio_context);
3680
3681 blockdev_mirror_common(bs, target_bs,
3682 has_replaces, replaces, sync,
3683 has_speed, speed,
3684 has_granularity, granularity,
3685 has_buf_size, buf_size,
3686 has_on_source_error, on_source_error,
3687 has_on_target_error, on_target_error,
3688 true, true,
3689 &local_err);
3690 if (local_err) {
3691 error_propagate(errp, local_err);
3692 bdrv_unref(target_bs);
3693 }
3694
3695 aio_context_release(aio_context);
3696}
3697
3698
3699static BlockJob *find_block_job(const char *device, AioContext **aio_context,
3700 Error **errp)
3701{
3702 BlockBackend *blk;
3703 BlockDriverState *bs;
3704
3705 *aio_context = NULL;
3706
3707 blk = blk_by_name(device);
3708 if (!blk) {
3709 goto notfound;
3710 }
3711
3712 *aio_context = blk_get_aio_context(blk);
3713 aio_context_acquire(*aio_context);
3714
3715 if (!blk_is_available(blk)) {
3716 goto notfound;
3717 }
3718 bs = blk_bs(blk);
3719
3720 if (!bs->job) {
3721 goto notfound;
3722 }
3723
3724 return bs->job;
3725
3726notfound:
3727 error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE,
3728 "No active block job on device '%s'", device);
3729 if (*aio_context) {
3730 aio_context_release(*aio_context);
3731 *aio_context = NULL;
3732 }
3733 return NULL;
3734}
3735
3736void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
3737{
3738 AioContext *aio_context;
3739 BlockJob *job = find_block_job(device, &aio_context, errp);
3740
3741 if (!job) {
3742 return;
3743 }
3744
3745 block_job_set_speed(job, speed, errp);
3746 aio_context_release(aio_context);
3747}
3748
3749void qmp_block_job_cancel(const char *device,
3750 bool has_force, bool force, Error **errp)
3751{
3752 AioContext *aio_context;
3753 BlockJob *job = find_block_job(device, &aio_context, errp);
3754
3755 if (!job) {
3756 return;
3757 }
3758
3759 if (!has_force) {
3760 force = false;
3761 }
3762
3763 if (job->user_paused && !force) {
3764 error_setg(errp, "The block job for device '%s' is currently paused",
3765 device);
3766 goto out;
3767 }
3768
3769 trace_qmp_block_job_cancel(job);
3770 block_job_cancel(job);
3771out:
3772 aio_context_release(aio_context);
3773}
3774
3775void qmp_block_job_pause(const char *device, Error **errp)
3776{
3777 AioContext *aio_context;
3778 BlockJob *job = find_block_job(device, &aio_context, errp);
3779
3780 if (!job || job->user_paused) {
3781 return;
3782 }
3783
3784 job->user_paused = true;
3785 trace_qmp_block_job_pause(job);
3786 block_job_pause(job);
3787 aio_context_release(aio_context);
3788}
3789
3790void qmp_block_job_resume(const char *device, Error **errp)
3791{
3792 AioContext *aio_context;
3793 BlockJob *job = find_block_job(device, &aio_context, errp);
3794
3795 if (!job || !job->user_paused) {
3796 return;
3797 }
3798
3799 job->user_paused = false;
3800 trace_qmp_block_job_resume(job);
3801 block_job_resume(job);
3802 aio_context_release(aio_context);
3803}
3804
3805void qmp_block_job_complete(const char *device, Error **errp)
3806{
3807 AioContext *aio_context;
3808 BlockJob *job = find_block_job(device, &aio_context, errp);
3809
3810 if (!job) {
3811 return;
3812 }
3813
3814 trace_qmp_block_job_complete(job);
3815 block_job_complete(job, errp);
3816 aio_context_release(aio_context);
3817}
3818
3819void qmp_change_backing_file(const char *device,
3820 const char *image_node_name,
3821 const char *backing_file,
3822 Error **errp)
3823{
3824 BlockBackend *blk;
3825 BlockDriverState *bs = NULL;
3826 AioContext *aio_context;
3827 BlockDriverState *image_bs = NULL;
3828 Error *local_err = NULL;
3829 bool ro;
3830 int open_flags;
3831 int ret;
3832
3833 blk = blk_by_name(device);
3834 if (!blk) {
3835 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3836 "Device '%s' not found", device);
3837 return;
3838 }
3839
3840 aio_context = blk_get_aio_context(blk);
3841 aio_context_acquire(aio_context);
3842
3843 if (!blk_is_available(blk)) {
3844 error_setg(errp, "Device '%s' has no medium", device);
3845 goto out;
3846 }
3847 bs = blk_bs(blk);
3848
3849 image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err);
3850 if (local_err) {
3851 error_propagate(errp, local_err);
3852 goto out;
3853 }
3854
3855 if (!image_bs) {
3856 error_setg(errp, "image file not found");
3857 goto out;
3858 }
3859
3860 if (bdrv_find_base(image_bs) == image_bs) {
3861 error_setg(errp, "not allowing backing file change on an image "
3862 "without a backing file");
3863 goto out;
3864 }
3865
3866
3867
3868 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) {
3869 goto out;
3870 }
3871
3872
3873 if (!bdrv_chain_contains(bs, image_bs)) {
3874 error_setg(errp, "'%s' and image file are not in the same chain",
3875 device);
3876 goto out;
3877 }
3878
3879
3880 open_flags = image_bs->open_flags;
3881 ro = bdrv_is_read_only(image_bs);
3882
3883 if (ro) {
3884 bdrv_reopen(image_bs, open_flags | BDRV_O_RDWR, &local_err);
3885 if (local_err) {
3886 error_propagate(errp, local_err);
3887 goto out;
3888 }
3889 }
3890
3891 ret = bdrv_change_backing_file(image_bs, backing_file,
3892 image_bs->drv ? image_bs->drv->format_name : "");
3893
3894 if (ret < 0) {
3895 error_setg_errno(errp, -ret, "Could not change backing file to '%s'",
3896 backing_file);
3897
3898
3899 }
3900
3901 if (ro) {
3902 bdrv_reopen(image_bs, open_flags, &local_err);
3903 if (local_err) {
3904 error_propagate(errp, local_err);
3905 }
3906 }
3907
3908out:
3909 aio_context_release(aio_context);
3910}
3911
3912void hmp_drive_add_node(Monitor *mon, const char *optstr)
3913{
3914 QemuOpts *opts;
3915 QDict *qdict;
3916 Error *local_err = NULL;
3917
3918 opts = qemu_opts_parse_noisily(&qemu_drive_opts, optstr, false);
3919 if (!opts) {
3920 return;
3921 }
3922
3923 qdict = qemu_opts_to_qdict(opts, NULL);
3924
3925 if (!qdict_get_try_str(qdict, "node-name")) {
3926 QDECREF(qdict);
3927 error_report("'node-name' needs to be specified");
3928 goto out;
3929 }
3930
3931 BlockDriverState *bs = bds_tree_init(qdict, &local_err);
3932 if (!bs) {
3933 error_report_err(local_err);
3934 goto out;
3935 }
3936
3937 QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list);
3938
3939out:
3940 qemu_opts_del(opts);
3941}
3942
3943void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
3944{
3945 QmpOutputVisitor *ov = qmp_output_visitor_new();
3946 BlockDriverState *bs;
3947 BlockBackend *blk = NULL;
3948 QObject *obj;
3949 QDict *qdict;
3950 Error *local_err = NULL;
3951
3952
3953
3954
3955
3956
3957 if (options->has_aio && options->aio == BLOCKDEV_AIO_OPTIONS_NATIVE) {
3958 bool direct = options->has_cache &&
3959 options->cache->has_direct &&
3960 options->cache->direct;
3961 if (!direct) {
3962 error_setg(errp, "aio=native requires cache.direct=true");
3963 goto fail;
3964 }
3965 }
3966
3967 visit_type_BlockdevOptions(qmp_output_get_visitor(ov), NULL, &options,
3968 &local_err);
3969 if (local_err) {
3970 error_propagate(errp, local_err);
3971 goto fail;
3972 }
3973
3974 obj = qmp_output_get_qobject(ov);
3975 qdict = qobject_to_qdict(obj);
3976
3977 qdict_flatten(qdict);
3978
3979 if (options->has_id) {
3980 blk = blockdev_init(NULL, qdict, &local_err);
3981 if (local_err) {
3982 error_propagate(errp, local_err);
3983 goto fail;
3984 }
3985
3986 bs = blk_bs(blk);
3987 } else {
3988 if (!qdict_get_try_str(qdict, "node-name")) {
3989 error_setg(errp, "'id' and/or 'node-name' need to be specified for "
3990 "the root node");
3991 goto fail;
3992 }
3993
3994 bs = bds_tree_init(qdict, errp);
3995 if (!bs) {
3996 goto fail;
3997 }
3998
3999 QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list);
4000 }
4001
4002 if (bs && bdrv_key_required(bs)) {
4003 if (blk) {
4004 monitor_remove_blk(blk);
4005 blk_unref(blk);
4006 } else {
4007 QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list);
4008 bdrv_unref(bs);
4009 }
4010 error_setg(errp, "blockdev-add doesn't support encrypted devices");
4011 goto fail;
4012 }
4013
4014fail:
4015 qmp_output_visitor_cleanup(ov);
4016}
4017
4018void qmp_x_blockdev_del(bool has_id, const char *id,
4019 bool has_node_name, const char *node_name, Error **errp)
4020{
4021 AioContext *aio_context;
4022 BlockBackend *blk;
4023 BlockDriverState *bs;
4024
4025 if (has_id && has_node_name) {
4026 error_setg(errp, "Only one of id and node-name must be specified");
4027 return;
4028 } else if (!has_id && !has_node_name) {
4029 error_setg(errp, "No block device specified");
4030 return;
4031 }
4032
4033 if (has_id) {
4034
4035 blk = blk_by_name(id);
4036 if (!blk) {
4037 error_setg(errp, "Cannot find block backend %s", id);
4038 return;
4039 }
4040 if (blk_legacy_dinfo(blk)) {
4041 error_setg(errp, "Deleting block backend added with drive-add"
4042 " is not supported");
4043 return;
4044 }
4045 if (blk_get_refcnt(blk) > 1) {
4046 error_setg(errp, "Block backend %s is in use", id);
4047 return;
4048 }
4049 bs = blk_bs(blk);
4050 aio_context = blk_get_aio_context(blk);
4051 } else {
4052 bs = bdrv_find_node(node_name);
4053 if (!bs) {
4054 error_setg(errp, "Cannot find node %s", node_name);
4055 return;
4056 }
4057 blk = bs->blk;
4058 if (blk) {
4059 error_setg(errp, "Node %s is in use by %s",
4060 node_name, blk_name(blk));
4061 return;
4062 }
4063 aio_context = bdrv_get_aio_context(bs);
4064 }
4065
4066 aio_context_acquire(aio_context);
4067
4068 if (bs) {
4069 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, errp)) {
4070 goto out;
4071 }
4072
4073 if (!blk && !bs->monitor_list.tqe_prev) {
4074 error_setg(errp, "Node %s is not owned by the monitor",
4075 bs->node_name);
4076 goto out;
4077 }
4078
4079 if (bs->refcnt > 1) {
4080 error_setg(errp, "Block device %s is in use",
4081 bdrv_get_device_or_node_name(bs));
4082 goto out;
4083 }
4084 }
4085
4086 if (blk) {
4087 monitor_remove_blk(blk);
4088 blk_unref(blk);
4089 } else {
4090 QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list);
4091 bdrv_unref(bs);
4092 }
4093
4094out:
4095 aio_context_release(aio_context);
4096}
4097
4098BlockJobInfoList *qmp_query_block_jobs(Error **errp)
4099{
4100 BlockJobInfoList *head = NULL, **p_next = &head;
4101 BlockDriverState *bs;
4102
4103 for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) {
4104 AioContext *aio_context = bdrv_get_aio_context(bs);
4105
4106 aio_context_acquire(aio_context);
4107
4108 if (bs->job) {
4109 BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
4110 elem->value = block_job_query(bs->job);
4111 *p_next = elem;
4112 p_next = &elem->next;
4113 }
4114
4115 aio_context_release(aio_context);
4116 }
4117
4118 return head;
4119}
4120
4121QemuOptsList qemu_common_drive_opts = {
4122 .name = "drive",
4123 .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
4124 .desc = {
4125 {
4126 .name = "snapshot",
4127 .type = QEMU_OPT_BOOL,
4128 .help = "enable/disable snapshot mode",
4129 },{
4130 .name = "discard",
4131 .type = QEMU_OPT_STRING,
4132 .help = "discard operation (ignore/off, unmap/on)",
4133 },{
4134 .name = "aio",
4135 .type = QEMU_OPT_STRING,
4136 .help = "host AIO implementation (threads, native)",
4137 },{
4138 .name = BDRV_OPT_CACHE_WB,
4139 .type = QEMU_OPT_BOOL,
4140 .help = "Enable writeback mode",
4141 },{
4142 .name = "format",
4143 .type = QEMU_OPT_STRING,
4144 .help = "disk format (raw, qcow2, ...)",
4145 },{
4146 .name = "rerror",
4147 .type = QEMU_OPT_STRING,
4148 .help = "read error action",
4149 },{
4150 .name = "werror",
4151 .type = QEMU_OPT_STRING,
4152 .help = "write error action",
4153 },{
4154 .name = "read-only",
4155 .type = QEMU_OPT_BOOL,
4156 .help = "open drive file as read-only",
4157 },{
4158 .name = "throttling.iops-total",
4159 .type = QEMU_OPT_NUMBER,
4160 .help = "limit total I/O operations per second",
4161 },{
4162 .name = "throttling.iops-read",
4163 .type = QEMU_OPT_NUMBER,
4164 .help = "limit read operations per second",
4165 },{
4166 .name = "throttling.iops-write",
4167 .type = QEMU_OPT_NUMBER,
4168 .help = "limit write operations per second",
4169 },{
4170 .name = "throttling.bps-total",
4171 .type = QEMU_OPT_NUMBER,
4172 .help = "limit total bytes per second",
4173 },{
4174 .name = "throttling.bps-read",
4175 .type = QEMU_OPT_NUMBER,
4176 .help = "limit read bytes per second",
4177 },{
4178 .name = "throttling.bps-write",
4179 .type = QEMU_OPT_NUMBER,
4180 .help = "limit write bytes per second",
4181 },{
4182 .name = "throttling.iops-total-max",
4183 .type = QEMU_OPT_NUMBER,
4184 .help = "I/O operations burst",
4185 },{
4186 .name = "throttling.iops-read-max",
4187 .type = QEMU_OPT_NUMBER,
4188 .help = "I/O operations read burst",
4189 },{
4190 .name = "throttling.iops-write-max",
4191 .type = QEMU_OPT_NUMBER,
4192 .help = "I/O operations write burst",
4193 },{
4194 .name = "throttling.bps-total-max",
4195 .type = QEMU_OPT_NUMBER,
4196 .help = "total bytes burst",
4197 },{
4198 .name = "throttling.bps-read-max",
4199 .type = QEMU_OPT_NUMBER,
4200 .help = "total bytes read burst",
4201 },{
4202 .name = "throttling.bps-write-max",
4203 .type = QEMU_OPT_NUMBER,
4204 .help = "total bytes write burst",
4205 },{
4206 .name = "throttling.iops-total-max-length",
4207 .type = QEMU_OPT_NUMBER,
4208 .help = "length of the iops-total-max burst period, in seconds",
4209 },{
4210 .name = "throttling.iops-read-max-length",
4211 .type = QEMU_OPT_NUMBER,
4212 .help = "length of the iops-read-max burst period, in seconds",
4213 },{
4214 .name = "throttling.iops-write-max-length",
4215 .type = QEMU_OPT_NUMBER,
4216 .help = "length of the iops-write-max burst period, in seconds",
4217 },{
4218 .name = "throttling.bps-total-max-length",
4219 .type = QEMU_OPT_NUMBER,
4220 .help = "length of the bps-total-max burst period, in seconds",
4221 },{
4222 .name = "throttling.bps-read-max-length",
4223 .type = QEMU_OPT_NUMBER,
4224 .help = "length of the bps-read-max burst period, in seconds",
4225 },{
4226 .name = "throttling.bps-write-max-length",
4227 .type = QEMU_OPT_NUMBER,
4228 .help = "length of the bps-write-max burst period, in seconds",
4229 },{
4230 .name = "throttling.iops-size",
4231 .type = QEMU_OPT_NUMBER,
4232 .help = "when limiting by iops max size of an I/O in bytes",
4233 },{
4234 .name = "throttling.group",
4235 .type = QEMU_OPT_STRING,
4236 .help = "name of the block throttling group",
4237 },{
4238 .name = "copy-on-read",
4239 .type = QEMU_OPT_BOOL,
4240 .help = "copy read data from backing file into image file",
4241 },{
4242 .name = "detect-zeroes",
4243 .type = QEMU_OPT_STRING,
4244 .help = "try to optimize zero writes (off, on, unmap)",
4245 },{
4246 .name = "stats-account-invalid",
4247 .type = QEMU_OPT_BOOL,
4248 .help = "whether to account for invalid I/O operations "
4249 "in the statistics",
4250 },{
4251 .name = "stats-account-failed",
4252 .type = QEMU_OPT_BOOL,
4253 .help = "whether to account for failed I/O operations "
4254 "in the statistics",
4255 },
4256 { }
4257 },
4258};
4259
4260static QemuOptsList qemu_root_bds_opts = {
4261 .name = "root-bds",
4262 .head = QTAILQ_HEAD_INITIALIZER(qemu_root_bds_opts.head),
4263 .desc = {
4264 {
4265 .name = "discard",
4266 .type = QEMU_OPT_STRING,
4267 .help = "discard operation (ignore/off, unmap/on)",
4268 },{
4269 .name = "aio",
4270 .type = QEMU_OPT_STRING,
4271 .help = "host AIO implementation (threads, native)",
4272 },{
4273 .name = "read-only",
4274 .type = QEMU_OPT_BOOL,
4275 .help = "open drive file as read-only",
4276 },{
4277 .name = "copy-on-read",
4278 .type = QEMU_OPT_BOOL,
4279 .help = "copy read data from backing file into image file",
4280 },{
4281 .name = "detect-zeroes",
4282 .type = QEMU_OPT_STRING,
4283 .help = "try to optimize zero writes (off, on, unmap)",
4284 },
4285 { }
4286 },
4287};
4288
4289QemuOptsList qemu_drive_opts = {
4290 .name = "drive",
4291 .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
4292 .desc = {
4293
4294
4295
4296
4297 { }
4298 },
4299};
4300