2 * QEMU host block devices
4 * Copyright (c) 2003-2008 Fabrice Bellard
6 * This work is licensed under the terms of the GNU GPL, version 2 or
7 * later. See the COPYING file in the top-level directory.
11 #include "hw/block-common.h"
14 #include "qemu-option.h"
15 #include "qemu-config.h"
16 #include "qemu-objects.h"
18 #include "block_int.h"
19 #include "qmp-commands.h"
21 #include "arch_init.h"
23 static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
25 static const char *const if_name[IF_COUNT] = {
29 [IF_FLOPPY] = "floppy",
30 [IF_PFLASH] = "pflash",
33 [IF_VIRTIO] = "virtio",
37 static const int if_max_devs[IF_COUNT] = {
39 * Do not change these numbers! They govern how drive option
40 * index maps to unit and bus. That mapping is ABI.
42 * All controllers used to imlement if=T drives need to support
43 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
44 * Otherwise, some index values map to "impossible" bus, unit
47 * For instance, if you change [IF_SCSI] to 255, -drive
48 * if=scsi,index=12 no longer means bus=1,unit=5, but
49 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
50 * the drive can't be set up. Regression.
57 * We automatically delete the drive when a device using it gets
58 * unplugged. Questionable feature, but we can't just drop it.
59 * Device models call blockdev_mark_auto_del() to schedule the
60 * automatic deletion, and generic qdev code calls blockdev_auto_del()
61 * when deletion is actually safe.
63 void blockdev_mark_auto_del(BlockDriverState *bs)
65 DriveInfo *dinfo = drive_get_by_blockdev(bs);
68 block_job_cancel(bs->job);
75 void blockdev_auto_del(BlockDriverState *bs)
77 DriveInfo *dinfo = drive_get_by_blockdev(bs);
79 if (dinfo && dinfo->auto_del) {
84 static int drive_index_to_bus_id(BlockInterfaceType type, int index)
86 int max_devs = if_max_devs[type];
87 return max_devs ? index / max_devs : 0;
90 static int drive_index_to_unit_id(BlockInterfaceType type, int index)
92 int max_devs = if_max_devs[type];
93 return max_devs ? index % max_devs : index;
96 QemuOpts *drive_def(const char *optstr)
98 return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0);
101 QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
107 opts = drive_def(optstr);
111 if (type != IF_DEFAULT) {
112 qemu_opt_set(opts, "if", if_name[type]);
115 snprintf(buf, sizeof(buf), "%d", index);
116 qemu_opt_set(opts, "index", buf);
119 qemu_opt_set(opts, "file", file);
123 DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
127 /* seek interface, bus and unit */
129 QTAILQ_FOREACH(dinfo, &drives, next) {
130 if (dinfo->type == type &&
139 DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
141 return drive_get(type,
142 drive_index_to_bus_id(type, index),
143 drive_index_to_unit_id(type, index));
146 int drive_get_max_bus(BlockInterfaceType type)
152 QTAILQ_FOREACH(dinfo, &drives, next) {
153 if(dinfo->type == type &&
154 dinfo->bus > max_bus)
155 max_bus = dinfo->bus;
160 /* Get a block device. This should only be used for single-drive devices
161 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
163 DriveInfo *drive_get_next(BlockInterfaceType type)
165 static int next_block_unit[IF_COUNT];
167 return drive_get(type, 0, next_block_unit[type]++);
170 DriveInfo *drive_get_by_blockdev(BlockDriverState *bs)
174 QTAILQ_FOREACH(dinfo, &drives, next) {
175 if (dinfo->bdrv == bs) {
182 static void bdrv_format_print(void *opaque, const char *name)
184 error_printf(" %s", name);
187 static void drive_uninit(DriveInfo *dinfo)
189 qemu_opts_del(dinfo->opts);
190 bdrv_delete(dinfo->bdrv);
192 QTAILQ_REMOVE(&drives, dinfo, next);
196 void drive_put_ref(DriveInfo *dinfo)
198 assert(dinfo->refcount);
199 if (--dinfo->refcount == 0) {
204 void drive_get_ref(DriveInfo *dinfo)
214 static void drive_put_ref_bh(void *opaque)
216 DrivePutRefBH *s = opaque;
218 drive_put_ref(s->dinfo);
219 qemu_bh_delete(s->bh);
224 * Release a drive reference in a BH
226 * It is not possible to use drive_put_ref() from a callback function when the
227 * callers still need the drive. In such cases we schedule a BH to release the
230 static void drive_put_ref_bh_schedule(DriveInfo *dinfo)
234 s = g_new(DrivePutRefBH, 1);
235 s->bh = qemu_bh_new(drive_put_ref_bh, s);
237 qemu_bh_schedule(s->bh);
240 static int parse_block_error_action(const char *buf, int is_read)
242 if (!strcmp(buf, "ignore")) {
243 return BLOCK_ERR_IGNORE;
244 } else if (!is_read && !strcmp(buf, "enospc")) {
245 return BLOCK_ERR_STOP_ENOSPC;
246 } else if (!strcmp(buf, "stop")) {
247 return BLOCK_ERR_STOP_ANY;
248 } else if (!strcmp(buf, "report")) {
249 return BLOCK_ERR_REPORT;
251 error_report("'%s' invalid %s error action",
252 buf, is_read ? "read" : "write");
258 extern int start_simple_client(char* msg);
259 extern char* maru_convert_path(char* msg, const char *path);
262 static bool do_check_io_limits(BlockIOLimit *io_limits)
269 bps_flag = (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] != 0)
270 && ((io_limits->bps[BLOCK_IO_LIMIT_READ] != 0)
271 || (io_limits->bps[BLOCK_IO_LIMIT_WRITE] != 0));
272 iops_flag = (io_limits->iops[BLOCK_IO_LIMIT_TOTAL] != 0)
273 && ((io_limits->iops[BLOCK_IO_LIMIT_READ] != 0)
274 || (io_limits->iops[BLOCK_IO_LIMIT_WRITE] != 0));
275 if (bps_flag || iops_flag) {
282 DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi)
285 const char *file = NULL;
287 const char *mediastr = "";
288 BlockInterfaceType type;
289 enum { MEDIA_DISK, MEDIA_CDROM } media;
291 int cyls, heads, secs, translation;
292 BlockDriver *drv = NULL;
297 int on_read_error, on_write_error;
300 BlockIOLimit io_limits;
305 translation = BIOS_ATA_TRANSLATION_AUTO;
308 /* extract parameters */
309 bus_id = qemu_opt_get_number(opts, "bus", 0);
310 unit_id = qemu_opt_get_number(opts, "unit", -1);
311 index = qemu_opt_get_number(opts, "index", -1);
313 cyls = qemu_opt_get_number(opts, "cyls", 0);
314 heads = qemu_opt_get_number(opts, "heads", 0);
315 secs = qemu_opt_get_number(opts, "secs", 0);
317 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
318 ro = qemu_opt_get_bool(opts, "readonly", 0);
319 copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false);
321 file = qemu_opt_get(opts, "file");
322 serial = qemu_opt_get(opts, "serial");
324 if ((buf = qemu_opt_get(opts, "if")) != NULL) {
325 for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++)
327 if (type == IF_COUNT) {
328 error_report("unsupported bus type '%s'", buf);
332 type = default_to_scsi ? IF_SCSI : IF_IDE;
335 max_devs = if_max_devs[type];
337 if (cyls || heads || secs) {
339 error_report("invalid physical cyls number");
343 error_report("invalid physical heads number");
347 error_report("invalid physical secs number");
352 if ((buf = qemu_opt_get(opts, "trans")) != NULL) {
354 error_report("'%s' trans must be used with cyls, heads and secs",
358 if (!strcmp(buf, "none"))
359 translation = BIOS_ATA_TRANSLATION_NONE;
360 else if (!strcmp(buf, "lba"))
361 translation = BIOS_ATA_TRANSLATION_LBA;
362 else if (!strcmp(buf, "auto"))
363 translation = BIOS_ATA_TRANSLATION_AUTO;
365 error_report("'%s' invalid translation type", buf);
370 if ((buf = qemu_opt_get(opts, "media")) != NULL) {
371 if (!strcmp(buf, "disk")) {
373 } else if (!strcmp(buf, "cdrom")) {
374 if (cyls || secs || heads) {
375 error_report("CHS can't be set with media=%s", buf);
380 error_report("'%s' invalid media", buf);
385 bdrv_flags |= BDRV_O_CACHE_WB;
386 if ((buf = qemu_opt_get(opts, "cache")) != NULL) {
387 if (bdrv_parse_cache_flags(buf, &bdrv_flags) != 0) {
388 error_report("invalid cache option");
393 #ifdef CONFIG_LINUX_AIO
394 if ((buf = qemu_opt_get(opts, "aio")) != NULL) {
395 if (!strcmp(buf, "native")) {
396 bdrv_flags |= BDRV_O_NATIVE_AIO;
397 } else if (!strcmp(buf, "threads")) {
398 /* this is the default */
400 error_report("invalid aio option");
406 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
407 if (is_help_option(buf)) {
408 error_printf("Supported formats:");
409 bdrv_iterate_format(bdrv_format_print, NULL);
413 drv = bdrv_find_whitelisted_format(buf);
415 error_report("'%s' invalid format", buf);
420 /* disk I/O throttling */
421 io_limits.bps[BLOCK_IO_LIMIT_TOTAL] =
422 qemu_opt_get_number(opts, "bps", 0);
423 io_limits.bps[BLOCK_IO_LIMIT_READ] =
424 qemu_opt_get_number(opts, "bps_rd", 0);
425 io_limits.bps[BLOCK_IO_LIMIT_WRITE] =
426 qemu_opt_get_number(opts, "bps_wr", 0);
427 io_limits.iops[BLOCK_IO_LIMIT_TOTAL] =
428 qemu_opt_get_number(opts, "iops", 0);
429 io_limits.iops[BLOCK_IO_LIMIT_READ] =
430 qemu_opt_get_number(opts, "iops_rd", 0);
431 io_limits.iops[BLOCK_IO_LIMIT_WRITE] =
432 qemu_opt_get_number(opts, "iops_wr", 0);
434 if (!do_check_io_limits(&io_limits)) {
435 error_report("bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) "
436 "cannot be used at the same time");
440 on_write_error = BLOCK_ERR_STOP_ENOSPC;
441 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
442 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
443 error_report("werror is not supported by this bus type");
447 on_write_error = parse_block_error_action(buf, 0);
448 if (on_write_error < 0) {
453 on_read_error = BLOCK_ERR_REPORT;
454 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
455 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
456 error_report("rerror is not supported by this bus type");
460 on_read_error = parse_block_error_action(buf, 1);
461 if (on_read_error < 0) {
466 if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) {
467 if (type != IF_VIRTIO) {
468 error_report("addr is not supported by this bus type");
473 /* compute bus and unit according index */
476 if (bus_id != 0 || unit_id != -1) {
477 error_report("index cannot be used with bus and unit");
480 bus_id = drive_index_to_bus_id(type, index);
481 unit_id = drive_index_to_unit_id(type, index);
484 /* if user doesn't specify a unit_id,
485 * try to find the first free
490 while (drive_get(type, bus_id, unit_id) != NULL) {
492 if (max_devs && unit_id >= max_devs) {
501 if (max_devs && unit_id >= max_devs) {
502 error_report("unit %d too big (max is %d)",
503 unit_id, max_devs - 1);
508 * catch multiple definitions
511 if (drive_get(type, bus_id, unit_id) != NULL) {
512 error_report("drive with bus=%d, unit=%d (index=%d) exists",
513 bus_id, unit_id, index);
519 dinfo = g_malloc0(sizeof(*dinfo));
520 if ((buf = qemu_opts_id(opts)) != NULL) {
521 dinfo->id = g_strdup(buf);
523 /* no id supplied -> create one */
524 dinfo->id = g_malloc0(32);
525 if (type == IF_IDE || type == IF_SCSI)
526 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
528 snprintf(dinfo->id, 32, "%s%i%s%i",
529 if_name[type], bus_id, mediastr, unit_id);
531 snprintf(dinfo->id, 32, "%s%s%i",
532 if_name[type], mediastr, unit_id);
534 dinfo->bdrv = bdrv_new(dinfo->id);
535 dinfo->devaddr = devaddr;
538 dinfo->unit = unit_id;
540 dinfo->heads = heads;
542 dinfo->trans = translation;
545 dinfo->serial = serial;
546 QTAILQ_INSERT_TAIL(&drives, dinfo, next);
548 bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error);
550 /* disk I/O throttling */
551 bdrv_set_io_limits(dinfo->bdrv, &io_limits);
558 dinfo->media_cd = media == MEDIA_CDROM;
566 /* add virtio block device */
567 opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0, NULL);
568 if (arch_type == QEMU_ARCH_S390X) {
569 qemu_opt_set(opts, "driver", "virtio-blk-s390");
571 qemu_opt_set(opts, "driver", "virtio-blk-pci");
573 qemu_opt_set(opts, "drive", dinfo->id);
575 qemu_opt_set(opts, "addr", devaddr);
580 if (!file || !*file) {
584 /* always use cache=unsafe with snapshot */
585 bdrv_flags &= ~BDRV_O_CACHE_MASK;
586 bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
590 bdrv_flags |= BDRV_O_COPY_ON_READ;
593 if (runstate_check(RUN_STATE_INMIGRATE)) {
594 bdrv_flags |= BDRV_O_INCOMING;
597 if (media == MEDIA_CDROM) {
598 /* CDROM is fine for any interface, don't check. */
600 } else if (ro == 1) {
601 if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY &&
602 type != IF_NONE && type != IF_PFLASH) {
603 error_report("readonly not supported by this bus type");
608 bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
610 if (ro && copy_on_read) {
611 error_report("warning: disabling copy_on_read on readonly drive");
614 ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv);
616 error_report("could not open disk image %s: %s",
617 file, strerror(-ret));
620 const char _msg[] = "Failed to load disk file from the following path. Check if the file is corrupted or missing.\n\n";
621 char* err_msg = NULL;
622 err_msg = maru_convert_path((char*)_msg, file);
623 start_simple_client(err_msg);
632 if (bdrv_key_required(dinfo->bdrv))
637 bdrv_delete(dinfo->bdrv);
639 QTAILQ_REMOVE(&drives, dinfo, next);
644 void do_commit(Monitor *mon, const QDict *qdict)
646 const char *device = qdict_get_str(qdict, "device");
647 BlockDriverState *bs;
650 if (!strcmp(device, "all")) {
651 ret = bdrv_commit_all();
653 qerror_report(QERR_DEVICE_IN_USE, device);
657 bs = bdrv_find(device);
659 qerror_report(QERR_DEVICE_NOT_FOUND, device);
662 ret = bdrv_commit(bs);
664 qerror_report(QERR_DEVICE_IN_USE, device);
670 static void blockdev_do_action(int kind, void *data, Error **errp)
672 BlockdevAction action;
673 BlockdevActionList list;
677 list.value = &action;
679 qmp_transaction(&list, errp);
682 void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file,
683 bool has_format, const char *format,
684 bool has_mode, enum NewImageMode mode,
687 BlockdevSnapshot snapshot = {
688 .device = (char *) device,
689 .snapshot_file = (char *) snapshot_file,
690 .has_format = has_format,
691 .format = (char *) format,
692 .has_mode = has_mode,
695 blockdev_do_action(BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, &snapshot,
700 /* New and old BlockDriverState structs for group snapshots */
701 typedef struct BlkTransactionStates {
702 BlockDriverState *old_bs;
703 BlockDriverState *new_bs;
704 QSIMPLEQ_ENTRY(BlkTransactionStates) entry;
705 } BlkTransactionStates;
708 * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
709 * then we do not pivot any of the devices in the group, and abandon the
712 void qmp_transaction(BlockdevActionList *dev_list, Error **errp)
715 BlockdevActionList *dev_entry = dev_list;
716 BlkTransactionStates *states, *next;
718 QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionStates) snap_bdrv_states;
719 QSIMPLEQ_INIT(&snap_bdrv_states);
721 /* drain all i/o before any snapshots */
724 /* We don't do anything in this loop that commits us to the snapshot */
725 while (NULL != dev_entry) {
726 BlockdevAction *dev_info = NULL;
727 BlockDriver *proto_drv;
730 enum NewImageMode mode;
731 const char *new_image_file;
733 const char *format = "qcow2";
735 dev_info = dev_entry->value;
736 dev_entry = dev_entry->next;
738 states = g_malloc0(sizeof(BlkTransactionStates));
739 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, states, entry);
741 switch (dev_info->kind) {
742 case BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC:
743 device = dev_info->blockdev_snapshot_sync->device;
744 if (!dev_info->blockdev_snapshot_sync->has_mode) {
745 dev_info->blockdev_snapshot_sync->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
747 new_image_file = dev_info->blockdev_snapshot_sync->snapshot_file;
748 if (dev_info->blockdev_snapshot_sync->has_format) {
749 format = dev_info->blockdev_snapshot_sync->format;
751 mode = dev_info->blockdev_snapshot_sync->mode;
757 drv = bdrv_find_format(format);
759 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
760 goto delete_and_fail;
763 states->old_bs = bdrv_find(device);
764 if (!states->old_bs) {
765 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
766 goto delete_and_fail;
769 if (!bdrv_is_inserted(states->old_bs)) {
770 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
771 goto delete_and_fail;
774 if (bdrv_in_use(states->old_bs)) {
775 error_set(errp, QERR_DEVICE_IN_USE, device);
776 goto delete_and_fail;
779 if (!bdrv_is_read_only(states->old_bs)) {
780 if (bdrv_flush(states->old_bs)) {
781 error_set(errp, QERR_IO_ERROR);
782 goto delete_and_fail;
786 flags = states->old_bs->open_flags;
788 proto_drv = bdrv_find_protocol(new_image_file);
790 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
791 goto delete_and_fail;
794 /* create new image w/backing file */
795 if (mode != NEW_IMAGE_MODE_EXISTING) {
796 ret = bdrv_img_create(new_image_file, format,
797 states->old_bs->filename,
798 states->old_bs->drv->format_name,
801 error_set(errp, QERR_OPEN_FILE_FAILED, new_image_file);
802 goto delete_and_fail;
806 /* We will manually add the backing_hd field to the bs later */
807 states->new_bs = bdrv_new("");
808 ret = bdrv_open(states->new_bs, new_image_file,
809 flags | BDRV_O_NO_BACKING, drv);
811 error_set(errp, QERR_OPEN_FILE_FAILED, new_image_file);
812 goto delete_and_fail;
817 /* Now we are going to do the actual pivot. Everything up to this point
818 * is reversible, but we are committed at this point */
819 QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) {
820 /* This removes our old bs from the bdrv_states, and adds the new bs */
821 bdrv_append(states->new_bs, states->old_bs);
829 * failure, and it is all-or-none; abandon each new bs, and keep using
830 * the original bs for all images
832 QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) {
833 if (states->new_bs) {
834 bdrv_delete(states->new_bs);
838 QSIMPLEQ_FOREACH_SAFE(states, &snap_bdrv_states, entry, next) {
845 static void eject_device(BlockDriverState *bs, int force, Error **errp)
847 if (bdrv_in_use(bs)) {
848 error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs));
851 if (!bdrv_dev_has_removable_media(bs)) {
852 error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs));
856 if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) {
857 bdrv_dev_eject_request(bs, force);
859 error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs));
867 void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
869 BlockDriverState *bs;
871 bs = bdrv_find(device);
873 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
877 eject_device(bs, force, errp);
880 void qmp_block_passwd(const char *device, const char *password, Error **errp)
882 BlockDriverState *bs;
885 bs = bdrv_find(device);
887 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
891 err = bdrv_set_key(bs, password);
892 if (err == -EINVAL) {
893 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
895 } else if (err < 0) {
896 error_set(errp, QERR_INVALID_PASSWORD);
901 static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename,
902 int bdrv_flags, BlockDriver *drv,
903 const char *password, Error **errp)
905 if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) {
906 error_set(errp, QERR_OPEN_FILE_FAILED, filename);
910 if (bdrv_key_required(bs)) {
912 if (bdrv_set_key(bs, password) < 0) {
913 error_set(errp, QERR_INVALID_PASSWORD);
916 error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs),
917 bdrv_get_encrypted_filename(bs));
919 } else if (password) {
920 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
924 void qmp_change_blockdev(const char *device, const char *filename,
925 bool has_format, const char *format, Error **errp)
927 BlockDriverState *bs;
928 BlockDriver *drv = NULL;
932 bs = bdrv_find(device);
934 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
939 drv = bdrv_find_whitelisted_format(format);
941 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
946 eject_device(bs, 0, &err);
947 if (error_is_set(&err)) {
948 error_propagate(errp, err);
952 bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
953 bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
955 qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
958 /* throttling disk I/O limits */
959 void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
960 int64_t bps_wr, int64_t iops, int64_t iops_rd,
961 int64_t iops_wr, Error **errp)
963 BlockIOLimit io_limits;
964 BlockDriverState *bs;
966 bs = bdrv_find(device);
968 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
972 io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = bps;
973 io_limits.bps[BLOCK_IO_LIMIT_READ] = bps_rd;
974 io_limits.bps[BLOCK_IO_LIMIT_WRITE] = bps_wr;
975 io_limits.iops[BLOCK_IO_LIMIT_TOTAL]= iops;
976 io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd;
977 io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr;
979 if (!do_check_io_limits(&io_limits)) {
980 error_set(errp, QERR_INVALID_PARAMETER_COMBINATION);
984 bs->io_limits = io_limits;
985 bs->slice_time = BLOCK_IO_SLICE_TIME;
987 if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) {
988 bdrv_io_limits_enable(bs);
989 } else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) {
990 bdrv_io_limits_disable(bs);
992 if (bs->block_timer) {
993 qemu_mod_timer(bs->block_timer, qemu_get_clock_ns(vm_clock));
998 int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
1000 const char *id = qdict_get_str(qdict, "id");
1001 BlockDriverState *bs;
1005 qerror_report(QERR_DEVICE_NOT_FOUND, id);
1008 if (bdrv_in_use(bs)) {
1009 qerror_report(QERR_DEVICE_IN_USE, id);
1013 /* quiesce block driver; prevent further io */
1018 /* if we have a device attached to this BlockDriverState
1019 * then we need to make the drive anonymous until the device
1020 * can be removed. If this is a drive with no device backing
1021 * then we can just get rid of the block driver state right here.
1023 if (bdrv_get_attached_dev(bs)) {
1026 drive_uninit(drive_get_by_blockdev(bs));
1032 void qmp_block_resize(const char *device, int64_t size, Error **errp)
1034 BlockDriverState *bs;
1036 bs = bdrv_find(device);
1038 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1043 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
1047 switch (bdrv_truncate(bs, size)) {
1051 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1054 error_set(errp, QERR_UNSUPPORTED);
1057 error_set(errp, QERR_DEVICE_IS_READ_ONLY, device);
1060 error_set(errp, QERR_DEVICE_IN_USE, device);
1063 error_set(errp, QERR_UNDEFINED_ERROR);
1068 static QObject *qobject_from_block_job(BlockJob *job)
1070 return qobject_from_jsonf("{ 'type': %s,"
1072 "'len': %" PRId64 ","
1073 "'offset': %" PRId64 ","
1074 "'speed': %" PRId64 " }",
1075 job->job_type->job_type,
1076 bdrv_get_device_name(job->bs),
1082 static void block_stream_cb(void *opaque, int ret)
1084 BlockDriverState *bs = opaque;
1087 trace_block_stream_cb(bs, bs->job, ret);
1090 obj = qobject_from_block_job(bs->job);
1092 QDict *dict = qobject_to_qdict(obj);
1093 qdict_put(dict, "error", qstring_from_str(strerror(-ret)));
1096 if (block_job_is_cancelled(bs->job)) {
1097 monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj);
1099 monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj);
1101 qobject_decref(obj);
1103 drive_put_ref_bh_schedule(drive_get_by_blockdev(bs));
1106 void qmp_block_stream(const char *device, bool has_base,
1107 const char *base, bool has_speed,
1108 int64_t speed, Error **errp)
1110 BlockDriverState *bs;
1111 BlockDriverState *base_bs = NULL;
1112 Error *local_err = NULL;
1114 bs = bdrv_find(device);
1116 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1121 base_bs = bdrv_find_backing_image(bs, base);
1122 if (base_bs == NULL) {
1123 error_set(errp, QERR_BASE_NOT_FOUND, base);
1128 stream_start(bs, base_bs, base, has_speed ? speed : 0,
1129 block_stream_cb, bs, &local_err);
1130 if (error_is_set(&local_err)) {
1131 error_propagate(errp, local_err);
1135 /* Grab a reference so hotplug does not delete the BlockDriverState from
1138 drive_get_ref(drive_get_by_blockdev(bs));
1140 trace_qmp_block_stream(bs, bs->job);
1143 static BlockJob *find_block_job(const char *device)
1145 BlockDriverState *bs;
1147 bs = bdrv_find(device);
1148 if (!bs || !bs->job) {
1154 void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
1156 BlockJob *job = find_block_job(device);
1159 error_set(errp, QERR_DEVICE_NOT_ACTIVE, device);
1163 block_job_set_speed(job, speed, errp);
1166 void qmp_block_job_cancel(const char *device, Error **errp)
1168 BlockJob *job = find_block_job(device);
1171 error_set(errp, QERR_DEVICE_NOT_ACTIVE, device);
1175 trace_qmp_block_job_cancel(job);
1176 block_job_cancel(job);
1179 static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs)
1181 BlockJobInfoList **prev = opaque;
1182 BlockJob *job = bs->job;
1185 BlockJobInfoList *elem;
1186 BlockJobInfo *info = g_new(BlockJobInfo, 1);
1187 *info = (BlockJobInfo){
1188 .type = g_strdup(job->job_type->job_type),
1189 .device = g_strdup(bdrv_get_device_name(bs)),
1191 .offset = job->offset,
1192 .speed = job->speed,
1195 elem = g_new0(BlockJobInfoList, 1);
1198 (*prev)->next = elem;
1203 BlockJobInfoList *qmp_query_block_jobs(Error **errp)
1205 /* Dummy is a fake list element for holding the head pointer */
1206 BlockJobInfoList dummy = {};
1207 BlockJobInfoList *prev = &dummy;
1208 bdrv_iterate(do_qmp_query_block_jobs_one, &prev);