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.
10 #include "sysemu/blockdev.h"
11 #include "hw/block-common.h"
12 #include "block/blockjob.h"
13 #include "monitor/monitor.h"
14 #include "qapi/qmp/qerror.h"
15 #include "qemu/option.h"
16 #include "qemu/config-file.h"
17 #include "qapi/qmp/types.h"
18 #include "sysemu/sysemu.h"
19 #include "block/block_int.h"
20 #include "qmp-commands.h"
22 #include "sysemu/arch_init.h"
24 static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
26 static const char *const if_name[IF_COUNT] = {
30 [IF_FLOPPY] = "floppy",
31 [IF_PFLASH] = "pflash",
34 [IF_VIRTIO] = "virtio",
38 static const int if_max_devs[IF_COUNT] = {
40 * Do not change these numbers! They govern how drive option
41 * index maps to unit and bus. That mapping is ABI.
43 * All controllers used to imlement if=T drives need to support
44 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
45 * Otherwise, some index values map to "impossible" bus, unit
48 * For instance, if you change [IF_SCSI] to 255, -drive
49 * if=scsi,index=12 no longer means bus=1,unit=5, but
50 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
51 * the drive can't be set up. Regression.
58 * We automatically delete the drive when a device using it gets
59 * unplugged. Questionable feature, but we can't just drop it.
60 * Device models call blockdev_mark_auto_del() to schedule the
61 * automatic deletion, and generic qdev code calls blockdev_auto_del()
62 * when deletion is actually safe.
64 void blockdev_mark_auto_del(BlockDriverState *bs)
66 DriveInfo *dinfo = drive_get_by_blockdev(bs);
69 block_job_cancel(bs->job);
76 void blockdev_auto_del(BlockDriverState *bs)
78 DriveInfo *dinfo = drive_get_by_blockdev(bs);
80 if (dinfo && dinfo->auto_del) {
85 static int drive_index_to_bus_id(BlockInterfaceType type, int index)
87 int max_devs = if_max_devs[type];
88 return max_devs ? index / max_devs : 0;
91 static int drive_index_to_unit_id(BlockInterfaceType type, int index)
93 int max_devs = if_max_devs[type];
94 return max_devs ? index % max_devs : index;
97 QemuOpts *drive_def(const char *optstr)
99 return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0);
102 QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
108 opts = drive_def(optstr);
112 if (type != IF_DEFAULT) {
113 qemu_opt_set(opts, "if", if_name[type]);
116 snprintf(buf, sizeof(buf), "%d", index);
117 qemu_opt_set(opts, "index", buf);
120 qemu_opt_set(opts, "file", file);
124 DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
128 /* seek interface, bus and unit */
130 QTAILQ_FOREACH(dinfo, &drives, next) {
131 if (dinfo->type == type &&
140 DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
142 return drive_get(type,
143 drive_index_to_bus_id(type, index),
144 drive_index_to_unit_id(type, index));
147 int drive_get_max_bus(BlockInterfaceType type)
153 QTAILQ_FOREACH(dinfo, &drives, next) {
154 if(dinfo->type == type &&
155 dinfo->bus > max_bus)
156 max_bus = dinfo->bus;
161 /* Get a block device. This should only be used for single-drive devices
162 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
164 DriveInfo *drive_get_next(BlockInterfaceType type)
166 static int next_block_unit[IF_COUNT];
168 return drive_get(type, 0, next_block_unit[type]++);
171 DriveInfo *drive_get_by_blockdev(BlockDriverState *bs)
175 QTAILQ_FOREACH(dinfo, &drives, next) {
176 if (dinfo->bdrv == bs) {
183 static void bdrv_format_print(void *opaque, const char *name)
185 error_printf(" %s", name);
188 static void drive_uninit(DriveInfo *dinfo)
190 qemu_opts_del(dinfo->opts);
191 bdrv_delete(dinfo->bdrv);
193 QTAILQ_REMOVE(&drives, dinfo, next);
197 void drive_put_ref(DriveInfo *dinfo)
199 assert(dinfo->refcount);
200 if (--dinfo->refcount == 0) {
205 void drive_get_ref(DriveInfo *dinfo)
215 static void drive_put_ref_bh(void *opaque)
217 DrivePutRefBH *s = opaque;
219 drive_put_ref(s->dinfo);
220 qemu_bh_delete(s->bh);
225 * Release a drive reference in a BH
227 * It is not possible to use drive_put_ref() from a callback function when the
228 * callers still need the drive. In such cases we schedule a BH to release the
231 static void drive_put_ref_bh_schedule(DriveInfo *dinfo)
235 s = g_new(DrivePutRefBH, 1);
236 s->bh = qemu_bh_new(drive_put_ref_bh, s);
238 qemu_bh_schedule(s->bh);
241 static int parse_block_error_action(const char *buf, bool is_read)
243 if (!strcmp(buf, "ignore")) {
244 return BLOCKDEV_ON_ERROR_IGNORE;
245 } else if (!is_read && !strcmp(buf, "enospc")) {
246 return BLOCKDEV_ON_ERROR_ENOSPC;
247 } else if (!strcmp(buf, "stop")) {
248 return BLOCKDEV_ON_ERROR_STOP;
249 } else if (!strcmp(buf, "report")) {
250 return BLOCKDEV_ON_ERROR_REPORT;
252 error_report("'%s' invalid %s error action",
253 buf, is_read ? "read" : "write");
258 static bool do_check_io_limits(BlockIOLimit *io_limits)
265 bps_flag = (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] != 0)
266 && ((io_limits->bps[BLOCK_IO_LIMIT_READ] != 0)
267 || (io_limits->bps[BLOCK_IO_LIMIT_WRITE] != 0));
268 iops_flag = (io_limits->iops[BLOCK_IO_LIMIT_TOTAL] != 0)
269 && ((io_limits->iops[BLOCK_IO_LIMIT_READ] != 0)
270 || (io_limits->iops[BLOCK_IO_LIMIT_WRITE] != 0));
271 if (bps_flag || iops_flag) {
278 DriveInfo *drive_init(QemuOpts *opts, BlockInterfaceType block_default_type)
281 const char *file = NULL;
283 const char *mediastr = "";
284 BlockInterfaceType type;
285 enum { MEDIA_DISK, MEDIA_CDROM } media;
287 int cyls, heads, secs, translation;
288 BlockDriver *drv = NULL;
293 int on_read_error, on_write_error;
296 BlockIOLimit io_limits;
301 translation = BIOS_ATA_TRANSLATION_AUTO;
304 /* extract parameters */
305 bus_id = qemu_opt_get_number(opts, "bus", 0);
306 unit_id = qemu_opt_get_number(opts, "unit", -1);
307 index = qemu_opt_get_number(opts, "index", -1);
309 cyls = qemu_opt_get_number(opts, "cyls", 0);
310 heads = qemu_opt_get_number(opts, "heads", 0);
311 secs = qemu_opt_get_number(opts, "secs", 0);
313 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
314 ro = qemu_opt_get_bool(opts, "readonly", 0);
315 copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false);
317 file = qemu_opt_get(opts, "file");
318 serial = qemu_opt_get(opts, "serial");
320 if ((buf = qemu_opt_get(opts, "if")) != NULL) {
321 for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++)
323 if (type == IF_COUNT) {
324 error_report("unsupported bus type '%s'", buf);
328 type = block_default_type;
331 max_devs = if_max_devs[type];
333 if (cyls || heads || secs) {
335 error_report("invalid physical cyls number");
339 error_report("invalid physical heads number");
343 error_report("invalid physical secs number");
348 if ((buf = qemu_opt_get(opts, "trans")) != NULL) {
350 error_report("'%s' trans must be used with cyls, heads and secs",
354 if (!strcmp(buf, "none"))
355 translation = BIOS_ATA_TRANSLATION_NONE;
356 else if (!strcmp(buf, "lba"))
357 translation = BIOS_ATA_TRANSLATION_LBA;
358 else if (!strcmp(buf, "auto"))
359 translation = BIOS_ATA_TRANSLATION_AUTO;
361 error_report("'%s' invalid translation type", buf);
366 if ((buf = qemu_opt_get(opts, "media")) != NULL) {
367 if (!strcmp(buf, "disk")) {
369 } else if (!strcmp(buf, "cdrom")) {
370 if (cyls || secs || heads) {
371 error_report("CHS can't be set with media=%s", buf);
376 error_report("'%s' invalid media", buf);
381 bdrv_flags |= BDRV_O_CACHE_WB;
382 if ((buf = qemu_opt_get(opts, "cache")) != NULL) {
383 if (bdrv_parse_cache_flags(buf, &bdrv_flags) != 0) {
384 error_report("invalid cache option");
389 #ifdef CONFIG_LINUX_AIO
390 if ((buf = qemu_opt_get(opts, "aio")) != NULL) {
391 if (!strcmp(buf, "native")) {
392 bdrv_flags |= BDRV_O_NATIVE_AIO;
393 } else if (!strcmp(buf, "threads")) {
394 /* this is the default */
396 error_report("invalid aio option");
402 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
403 if (is_help_option(buf)) {
404 error_printf("Supported formats:");
405 bdrv_iterate_format(bdrv_format_print, NULL);
409 drv = bdrv_find_whitelisted_format(buf);
411 error_report("'%s' invalid format", buf);
416 /* disk I/O throttling */
417 io_limits.bps[BLOCK_IO_LIMIT_TOTAL] =
418 qemu_opt_get_number(opts, "bps", 0);
419 io_limits.bps[BLOCK_IO_LIMIT_READ] =
420 qemu_opt_get_number(opts, "bps_rd", 0);
421 io_limits.bps[BLOCK_IO_LIMIT_WRITE] =
422 qemu_opt_get_number(opts, "bps_wr", 0);
423 io_limits.iops[BLOCK_IO_LIMIT_TOTAL] =
424 qemu_opt_get_number(opts, "iops", 0);
425 io_limits.iops[BLOCK_IO_LIMIT_READ] =
426 qemu_opt_get_number(opts, "iops_rd", 0);
427 io_limits.iops[BLOCK_IO_LIMIT_WRITE] =
428 qemu_opt_get_number(opts, "iops_wr", 0);
430 if (!do_check_io_limits(&io_limits)) {
431 error_report("bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) "
432 "cannot be used at the same time");
436 if (qemu_opt_get(opts, "boot") != NULL) {
437 fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
438 "ignored. Future versions will reject this parameter. Please "
439 "update your scripts.\n");
442 on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
443 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
444 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
445 error_report("werror is not supported by this bus type");
449 on_write_error = parse_block_error_action(buf, 0);
450 if (on_write_error < 0) {
455 on_read_error = BLOCKDEV_ON_ERROR_REPORT;
456 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
457 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
458 error_report("rerror is not supported by this bus type");
462 on_read_error = parse_block_error_action(buf, 1);
463 if (on_read_error < 0) {
468 if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) {
469 if (type != IF_VIRTIO) {
470 error_report("addr is not supported by this bus type");
475 /* compute bus and unit according index */
478 if (bus_id != 0 || unit_id != -1) {
479 error_report("index cannot be used with bus and unit");
482 bus_id = drive_index_to_bus_id(type, index);
483 unit_id = drive_index_to_unit_id(type, index);
486 /* if user doesn't specify a unit_id,
487 * try to find the first free
492 while (drive_get(type, bus_id, unit_id) != NULL) {
494 if (max_devs && unit_id >= max_devs) {
503 if (max_devs && unit_id >= max_devs) {
504 error_report("unit %d too big (max is %d)",
505 unit_id, max_devs - 1);
510 * catch multiple definitions
513 if (drive_get(type, bus_id, unit_id) != NULL) {
514 error_report("drive with bus=%d, unit=%d (index=%d) exists",
515 bus_id, unit_id, index);
521 dinfo = g_malloc0(sizeof(*dinfo));
522 if ((buf = qemu_opts_id(opts)) != NULL) {
523 dinfo->id = g_strdup(buf);
525 /* no id supplied -> create one */
526 dinfo->id = g_malloc0(32);
527 if (type == IF_IDE || type == IF_SCSI)
528 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
530 snprintf(dinfo->id, 32, "%s%i%s%i",
531 if_name[type], bus_id, mediastr, unit_id);
533 snprintf(dinfo->id, 32, "%s%s%i",
534 if_name[type], mediastr, unit_id);
536 dinfo->bdrv = bdrv_new(dinfo->id);
537 dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
538 dinfo->bdrv->read_only = ro;
539 dinfo->devaddr = devaddr;
542 dinfo->unit = unit_id;
544 dinfo->heads = heads;
546 dinfo->trans = translation;
549 dinfo->serial = serial;
550 QTAILQ_INSERT_TAIL(&drives, dinfo, next);
552 bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error);
554 /* disk I/O throttling */
555 bdrv_set_io_limits(dinfo->bdrv, &io_limits);
562 dinfo->media_cd = media == MEDIA_CDROM;
570 /* add virtio block device */
571 opts = qemu_opts_create_nofail(qemu_find_opts("device"));
572 if (arch_type == QEMU_ARCH_S390X) {
573 qemu_opt_set(opts, "driver", "virtio-blk-s390");
575 qemu_opt_set(opts, "driver", "virtio-blk-pci");
577 qemu_opt_set(opts, "drive", dinfo->id);
579 qemu_opt_set(opts, "addr", devaddr);
584 if (!file || !*file) {
588 /* always use cache=unsafe with snapshot */
589 bdrv_flags &= ~BDRV_O_CACHE_MASK;
590 bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
594 bdrv_flags |= BDRV_O_COPY_ON_READ;
597 if (runstate_check(RUN_STATE_INMIGRATE)) {
598 bdrv_flags |= BDRV_O_INCOMING;
601 if (media == MEDIA_CDROM) {
602 /* CDROM is fine for any interface, don't check. */
604 } else if (ro == 1) {
605 if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY &&
606 type != IF_NONE && type != IF_PFLASH) {
607 error_report("readonly not supported by this bus type");
612 bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
614 if (ro && copy_on_read) {
615 error_report("warning: disabling copy_on_read on readonly drive");
618 ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv);
620 if (ret == -EMEDIUMTYPE) {
621 error_report("could not open disk image %s: not in %s format",
622 file, drv->format_name);
624 error_report("could not open disk image %s: %s",
625 file, strerror(-ret));
630 if (bdrv_key_required(dinfo->bdrv))
635 bdrv_delete(dinfo->bdrv);
637 QTAILQ_REMOVE(&drives, dinfo, next);
642 void do_commit(Monitor *mon, const QDict *qdict)
644 const char *device = qdict_get_str(qdict, "device");
645 BlockDriverState *bs;
648 if (!strcmp(device, "all")) {
649 ret = bdrv_commit_all();
651 bs = bdrv_find(device);
653 monitor_printf(mon, "Device '%s' not found\n", device);
656 ret = bdrv_commit(bs);
659 monitor_printf(mon, "'commit' error for '%s': %s\n", device,
664 static void blockdev_do_action(int kind, void *data, Error **errp)
666 BlockdevAction action;
667 BlockdevActionList list;
671 list.value = &action;
673 qmp_transaction(&list, errp);
676 void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file,
677 bool has_format, const char *format,
678 bool has_mode, enum NewImageMode mode,
681 BlockdevSnapshot snapshot = {
682 .device = (char *) device,
683 .snapshot_file = (char *) snapshot_file,
684 .has_format = has_format,
685 .format = (char *) format,
686 .has_mode = has_mode,
689 blockdev_do_action(BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, &snapshot,
694 /* New and old BlockDriverState structs for group snapshots */
695 typedef struct BlkTransactionStates {
696 BlockDriverState *old_bs;
697 BlockDriverState *new_bs;
698 QSIMPLEQ_ENTRY(BlkTransactionStates) entry;
699 } BlkTransactionStates;
702 * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
703 * then we do not pivot any of the devices in the group, and abandon the
706 void qmp_transaction(BlockdevActionList *dev_list, Error **errp)
709 BlockdevActionList *dev_entry = dev_list;
710 BlkTransactionStates *states, *next;
711 Error *local_err = NULL;
713 QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionStates) snap_bdrv_states;
714 QSIMPLEQ_INIT(&snap_bdrv_states);
716 /* drain all i/o before any snapshots */
719 /* We don't do anything in this loop that commits us to the snapshot */
720 while (NULL != dev_entry) {
721 BlockdevAction *dev_info = NULL;
722 BlockDriver *proto_drv;
725 enum NewImageMode mode;
726 const char *new_image_file;
728 const char *format = "qcow2";
730 dev_info = dev_entry->value;
731 dev_entry = dev_entry->next;
733 states = g_malloc0(sizeof(BlkTransactionStates));
734 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, states, entry);
736 switch (dev_info->kind) {
737 case BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC:
738 device = dev_info->blockdev_snapshot_sync->device;
739 if (!dev_info->blockdev_snapshot_sync->has_mode) {
740 dev_info->blockdev_snapshot_sync->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
742 new_image_file = dev_info->blockdev_snapshot_sync->snapshot_file;
743 if (dev_info->blockdev_snapshot_sync->has_format) {
744 format = dev_info->blockdev_snapshot_sync->format;
746 mode = dev_info->blockdev_snapshot_sync->mode;
752 drv = bdrv_find_format(format);
754 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
755 goto delete_and_fail;
758 states->old_bs = bdrv_find(device);
759 if (!states->old_bs) {
760 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
761 goto delete_and_fail;
764 if (!bdrv_is_inserted(states->old_bs)) {
765 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
766 goto delete_and_fail;
769 if (bdrv_in_use(states->old_bs)) {
770 error_set(errp, QERR_DEVICE_IN_USE, device);
771 goto delete_and_fail;
774 if (!bdrv_is_read_only(states->old_bs)) {
775 if (bdrv_flush(states->old_bs)) {
776 error_set(errp, QERR_IO_ERROR);
777 goto delete_and_fail;
781 flags = states->old_bs->open_flags;
783 proto_drv = bdrv_find_protocol(new_image_file);
785 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
786 goto delete_and_fail;
789 /* create new image w/backing file */
790 if (mode != NEW_IMAGE_MODE_EXISTING) {
791 bdrv_img_create(new_image_file, format,
792 states->old_bs->filename,
793 states->old_bs->drv->format_name,
794 NULL, -1, flags, &local_err);
795 if (error_is_set(&local_err)) {
796 error_propagate(errp, local_err);
797 goto delete_and_fail;
801 /* We will manually add the backing_hd field to the bs later */
802 states->new_bs = bdrv_new("");
803 ret = bdrv_open(states->new_bs, new_image_file,
804 flags | BDRV_O_NO_BACKING, drv);
806 error_set(errp, QERR_OPEN_FILE_FAILED, new_image_file);
807 goto delete_and_fail;
812 /* Now we are going to do the actual pivot. Everything up to this point
813 * is reversible, but we are committed at this point */
814 QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) {
815 /* This removes our old bs from the bdrv_states, and adds the new bs */
816 bdrv_append(states->new_bs, states->old_bs);
817 /* We don't need (or want) to use the transactional
818 * bdrv_reopen_multiple() across all the entries at once, because we
819 * don't want to abort all of them if one of them fails the reopen */
820 bdrv_reopen(states->new_bs, states->new_bs->open_flags & ~BDRV_O_RDWR,
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) {
844 static void eject_device(BlockDriverState *bs, int force, Error **errp)
846 if (bdrv_in_use(bs)) {
847 error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs));
850 if (!bdrv_dev_has_removable_media(bs)) {
851 error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs));
855 if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) {
856 bdrv_dev_eject_request(bs, force);
858 error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs));
866 void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
868 BlockDriverState *bs;
870 bs = bdrv_find(device);
872 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
876 eject_device(bs, force, errp);
879 void qmp_block_passwd(const char *device, const char *password, Error **errp)
881 BlockDriverState *bs;
884 bs = bdrv_find(device);
886 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
890 err = bdrv_set_key(bs, password);
891 if (err == -EINVAL) {
892 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
894 } else if (err < 0) {
895 error_set(errp, QERR_INVALID_PASSWORD);
900 static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename,
901 int bdrv_flags, BlockDriver *drv,
902 const char *password, Error **errp)
904 if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) {
905 error_set(errp, QERR_OPEN_FILE_FAILED, filename);
909 if (bdrv_key_required(bs)) {
911 if (bdrv_set_key(bs, password) < 0) {
912 error_set(errp, QERR_INVALID_PASSWORD);
915 error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs),
916 bdrv_get_encrypted_filename(bs));
918 } else if (password) {
919 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
923 void qmp_change_blockdev(const char *device, const char *filename,
924 bool has_format, const char *format, Error **errp)
926 BlockDriverState *bs;
927 BlockDriver *drv = NULL;
931 bs = bdrv_find(device);
933 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
938 drv = bdrv_find_whitelisted_format(format);
940 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
945 eject_device(bs, 0, &err);
946 if (error_is_set(&err)) {
947 error_propagate(errp, err);
951 bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
952 bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
954 qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
957 /* throttling disk I/O limits */
958 void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
959 int64_t bps_wr, int64_t iops, int64_t iops_rd,
960 int64_t iops_wr, Error **errp)
962 BlockIOLimit io_limits;
963 BlockDriverState *bs;
965 bs = bdrv_find(device);
967 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
971 io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = bps;
972 io_limits.bps[BLOCK_IO_LIMIT_READ] = bps_rd;
973 io_limits.bps[BLOCK_IO_LIMIT_WRITE] = bps_wr;
974 io_limits.iops[BLOCK_IO_LIMIT_TOTAL]= iops;
975 io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd;
976 io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr;
978 if (!do_check_io_limits(&io_limits)) {
979 error_set(errp, QERR_INVALID_PARAMETER_COMBINATION);
983 bs->io_limits = io_limits;
984 bs->slice_time = BLOCK_IO_SLICE_TIME;
986 if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) {
987 bdrv_io_limits_enable(bs);
988 } else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) {
989 bdrv_io_limits_disable(bs);
991 if (bs->block_timer) {
992 qemu_mod_timer(bs->block_timer, qemu_get_clock_ns(vm_clock));
997 int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
999 const char *id = qdict_get_str(qdict, "id");
1000 BlockDriverState *bs;
1004 qerror_report(QERR_DEVICE_NOT_FOUND, id);
1007 if (bdrv_in_use(bs)) {
1008 qerror_report(QERR_DEVICE_IN_USE, id);
1012 /* quiesce block driver; prevent further io */
1017 /* if we have a device attached to this BlockDriverState
1018 * then we need to make the drive anonymous until the device
1019 * can be removed. If this is a drive with no device backing
1020 * then we can just get rid of the block driver state right here.
1022 if (bdrv_get_attached_dev(bs)) {
1025 drive_uninit(drive_get_by_blockdev(bs));
1031 void qmp_block_resize(const char *device, int64_t size, Error **errp)
1033 BlockDriverState *bs;
1035 bs = bdrv_find(device);
1037 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1042 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
1046 switch (bdrv_truncate(bs, size)) {
1050 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1053 error_set(errp, QERR_UNSUPPORTED);
1056 error_set(errp, QERR_DEVICE_IS_READ_ONLY, device);
1059 error_set(errp, QERR_DEVICE_IN_USE, device);
1062 error_set(errp, QERR_UNDEFINED_ERROR);
1067 static void block_job_cb(void *opaque, int ret)
1069 BlockDriverState *bs = opaque;
1072 trace_block_job_cb(bs, bs->job, ret);
1075 obj = qobject_from_block_job(bs->job);
1077 QDict *dict = qobject_to_qdict(obj);
1078 qdict_put(dict, "error", qstring_from_str(strerror(-ret)));
1081 if (block_job_is_cancelled(bs->job)) {
1082 monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj);
1084 monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj);
1086 qobject_decref(obj);
1088 drive_put_ref_bh_schedule(drive_get_by_blockdev(bs));
1091 void qmp_block_stream(const char *device, bool has_base,
1092 const char *base, bool has_speed, int64_t speed,
1093 bool has_on_error, BlockdevOnError on_error,
1096 BlockDriverState *bs;
1097 BlockDriverState *base_bs = NULL;
1098 Error *local_err = NULL;
1100 if (!has_on_error) {
1101 on_error = BLOCKDEV_ON_ERROR_REPORT;
1104 bs = bdrv_find(device);
1106 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1111 base_bs = bdrv_find_backing_image(bs, base);
1112 if (base_bs == NULL) {
1113 error_set(errp, QERR_BASE_NOT_FOUND, base);
1118 stream_start(bs, base_bs, base, has_speed ? speed : 0,
1119 on_error, block_job_cb, bs, &local_err);
1120 if (error_is_set(&local_err)) {
1121 error_propagate(errp, local_err);
1125 /* Grab a reference so hotplug does not delete the BlockDriverState from
1128 drive_get_ref(drive_get_by_blockdev(bs));
1130 trace_qmp_block_stream(bs, bs->job);
1133 void qmp_block_commit(const char *device,
1134 bool has_base, const char *base, const char *top,
1135 bool has_speed, int64_t speed,
1138 BlockDriverState *bs;
1139 BlockDriverState *base_bs, *top_bs;
1140 Error *local_err = NULL;
1141 /* This will be part of the QMP command, if/when the
1142 * BlockdevOnError change for blkmirror makes it in
1144 BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
1146 /* drain all i/o before commits */
1149 bs = bdrv_find(device);
1151 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1155 /* default top_bs is the active layer */
1159 if (strcmp(bs->filename, top) != 0) {
1160 top_bs = bdrv_find_backing_image(bs, top);
1164 if (top_bs == NULL) {
1165 error_setg(errp, "Top image file %s not found", top ? top : "NULL");
1169 if (has_base && base) {
1170 base_bs = bdrv_find_backing_image(top_bs, base);
1172 base_bs = bdrv_find_base(top_bs);
1175 if (base_bs == NULL) {
1176 error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
1180 commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs,
1182 if (local_err != NULL) {
1183 error_propagate(errp, local_err);
1186 /* Grab a reference so hotplug does not delete the BlockDriverState from
1189 drive_get_ref(drive_get_by_blockdev(bs));
1192 #define DEFAULT_MIRROR_BUF_SIZE (10 << 20)
1194 void qmp_drive_mirror(const char *device, const char *target,
1195 bool has_format, const char *format,
1196 enum MirrorSyncMode sync,
1197 bool has_mode, enum NewImageMode mode,
1198 bool has_speed, int64_t speed,
1199 bool has_granularity, uint32_t granularity,
1200 bool has_buf_size, int64_t buf_size,
1201 bool has_on_source_error, BlockdevOnError on_source_error,
1202 bool has_on_target_error, BlockdevOnError on_target_error,
1205 BlockDriverState *bs;
1206 BlockDriverState *source, *target_bs;
1207 BlockDriver *proto_drv;
1208 BlockDriver *drv = NULL;
1209 Error *local_err = NULL;
1217 if (!has_on_source_error) {
1218 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
1220 if (!has_on_target_error) {
1221 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
1224 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1226 if (!has_granularity) {
1229 if (!has_buf_size) {
1230 buf_size = DEFAULT_MIRROR_BUF_SIZE;
1233 if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
1234 error_set(errp, QERR_INVALID_PARAMETER, device);
1237 if (granularity & (granularity - 1)) {
1238 error_set(errp, QERR_INVALID_PARAMETER, device);
1242 bs = bdrv_find(device);
1244 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1248 if (!bdrv_is_inserted(bs)) {
1249 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1254 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
1257 drv = bdrv_find_format(format);
1259 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1264 if (bdrv_in_use(bs)) {
1265 error_set(errp, QERR_DEVICE_IN_USE, device);
1269 flags = bs->open_flags | BDRV_O_RDWR;
1270 source = bs->backing_hd;
1271 if (!source && sync == MIRROR_SYNC_MODE_TOP) {
1272 sync = MIRROR_SYNC_MODE_FULL;
1275 proto_drv = bdrv_find_protocol(target);
1277 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1281 bdrv_get_geometry(bs, &size);
1283 if (sync == MIRROR_SYNC_MODE_FULL && mode != NEW_IMAGE_MODE_EXISTING) {
1284 /* create new image w/o backing file */
1285 assert(format && drv);
1286 bdrv_img_create(target, format,
1287 NULL, NULL, NULL, size, flags, &local_err);
1290 case NEW_IMAGE_MODE_EXISTING:
1293 case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
1294 /* create new image with backing file */
1295 bdrv_img_create(target, format,
1297 source->drv->format_name,
1298 NULL, size, flags, &local_err);
1305 if (error_is_set(&local_err)) {
1306 error_propagate(errp, local_err);
1310 /* Mirroring takes care of copy-on-write using the source's backing
1313 target_bs = bdrv_new("");
1314 ret = bdrv_open(target_bs, target, flags | BDRV_O_NO_BACKING, drv);
1317 bdrv_delete(target_bs);
1318 error_set(errp, QERR_OPEN_FILE_FAILED, target);
1322 mirror_start(bs, target_bs, speed, granularity, buf_size, sync,
1323 on_source_error, on_target_error,
1324 block_job_cb, bs, &local_err);
1325 if (local_err != NULL) {
1326 bdrv_delete(target_bs);
1327 error_propagate(errp, local_err);
1331 /* Grab a reference so hotplug does not delete the BlockDriverState from
1334 drive_get_ref(drive_get_by_blockdev(bs));
1337 static BlockJob *find_block_job(const char *device)
1339 BlockDriverState *bs;
1341 bs = bdrv_find(device);
1342 if (!bs || !bs->job) {
1348 void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
1350 BlockJob *job = find_block_job(device);
1353 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1357 block_job_set_speed(job, speed, errp);
1360 void qmp_block_job_cancel(const char *device,
1361 bool has_force, bool force, Error **errp)
1363 BlockJob *job = find_block_job(device);
1370 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1373 if (job->paused && !force) {
1374 error_set(errp, QERR_BLOCK_JOB_PAUSED, device);
1378 trace_qmp_block_job_cancel(job);
1379 block_job_cancel(job);
1382 void qmp_block_job_pause(const char *device, Error **errp)
1384 BlockJob *job = find_block_job(device);
1387 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1391 trace_qmp_block_job_pause(job);
1392 block_job_pause(job);
1395 void qmp_block_job_resume(const char *device, Error **errp)
1397 BlockJob *job = find_block_job(device);
1400 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1404 trace_qmp_block_job_resume(job);
1405 block_job_resume(job);
1408 void qmp_block_job_complete(const char *device, Error **errp)
1410 BlockJob *job = find_block_job(device);
1413 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1417 trace_qmp_block_job_complete(job);
1418 block_job_complete(job, errp);
1421 static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs)
1423 BlockJobInfoList **prev = opaque;
1424 BlockJob *job = bs->job;
1427 BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
1428 elem->value = block_job_query(bs->job);
1429 (*prev)->next = elem;
1434 BlockJobInfoList *qmp_query_block_jobs(Error **errp)
1436 /* Dummy is a fake list element for holding the head pointer */
1437 BlockJobInfoList dummy = {};
1438 BlockJobInfoList *prev = &dummy;
1439 bdrv_iterate(do_qmp_query_block_jobs_one, &prev);
1443 QemuOptsList qemu_drive_opts = {
1445 .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
1449 .type = QEMU_OPT_NUMBER,
1450 .help = "bus number",
1453 .type = QEMU_OPT_NUMBER,
1454 .help = "unit number (i.e. lun for scsi)",
1457 .type = QEMU_OPT_STRING,
1458 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
1461 .type = QEMU_OPT_NUMBER,
1462 .help = "index number",
1465 .type = QEMU_OPT_NUMBER,
1466 .help = "number of cylinders (ide disk geometry)",
1469 .type = QEMU_OPT_NUMBER,
1470 .help = "number of heads (ide disk geometry)",
1473 .type = QEMU_OPT_NUMBER,
1474 .help = "number of sectors (ide disk geometry)",
1477 .type = QEMU_OPT_STRING,
1478 .help = "chs translation (auto, lba. none)",
1481 .type = QEMU_OPT_STRING,
1482 .help = "media type (disk, cdrom)",
1485 .type = QEMU_OPT_BOOL,
1486 .help = "enable/disable snapshot mode",
1489 .type = QEMU_OPT_STRING,
1490 .help = "disk image",
1493 .type = QEMU_OPT_STRING,
1494 .help = "host cache usage (none, writeback, writethrough, "
1495 "directsync, unsafe)",
1498 .type = QEMU_OPT_STRING,
1499 .help = "host AIO implementation (threads, native)",
1502 .type = QEMU_OPT_STRING,
1503 .help = "disk format (raw, qcow2, ...)",
1506 .type = QEMU_OPT_STRING,
1507 .help = "disk serial number",
1510 .type = QEMU_OPT_STRING,
1511 .help = "read error action",
1514 .type = QEMU_OPT_STRING,
1515 .help = "write error action",
1518 .type = QEMU_OPT_STRING,
1519 .help = "pci address (virtio only)",
1522 .type = QEMU_OPT_BOOL,
1523 .help = "open drive file as read-only",
1526 .type = QEMU_OPT_NUMBER,
1527 .help = "limit total I/O operations per second",
1530 .type = QEMU_OPT_NUMBER,
1531 .help = "limit read operations per second",
1534 .type = QEMU_OPT_NUMBER,
1535 .help = "limit write operations per second",
1538 .type = QEMU_OPT_NUMBER,
1539 .help = "limit total bytes per second",
1542 .type = QEMU_OPT_NUMBER,
1543 .help = "limit read bytes per second",
1546 .type = QEMU_OPT_NUMBER,
1547 .help = "limit write bytes per second",
1549 .name = "copy-on-read",
1550 .type = QEMU_OPT_BOOL,
1551 .help = "copy read data from backing file into image file",
1554 .type = QEMU_OPT_BOOL,
1555 .help = "(deprecated, ignored)",
1557 { /* end of list */ }