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.
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");
257 static bool do_check_io_limits(BlockIOLimit
*io_limits
)
264 bps_flag
= (io_limits
->bps
[BLOCK_IO_LIMIT_TOTAL
] != 0)
265 && ((io_limits
->bps
[BLOCK_IO_LIMIT_READ
] != 0)
266 || (io_limits
->bps
[BLOCK_IO_LIMIT_WRITE
] != 0));
267 iops_flag
= (io_limits
->iops
[BLOCK_IO_LIMIT_TOTAL
] != 0)
268 && ((io_limits
->iops
[BLOCK_IO_LIMIT_READ
] != 0)
269 || (io_limits
->iops
[BLOCK_IO_LIMIT_WRITE
] != 0));
270 if (bps_flag
|| iops_flag
) {
277 DriveInfo
*drive_init(QemuOpts
*opts
, int default_to_scsi
)
280 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 pstrcpy(devname
, sizeof(devname
), buf
);
322 for (type
= 0; type
< IF_COUNT
&& strcmp(buf
, if_name
[type
]); type
++)
324 if (type
== IF_COUNT
) {
325 error_report("unsupported bus type '%s'", buf
);
329 type
= default_to_scsi
? IF_SCSI
: IF_IDE
;
330 pstrcpy(devname
, sizeof(devname
), if_name
[type
]);
333 max_devs
= if_max_devs
[type
];
335 if (cyls
|| heads
|| secs
) {
336 if (cyls
< 1 || (type
== IF_IDE
&& cyls
> 16383)) {
337 error_report("invalid physical cyls number");
340 if (heads
< 1 || (type
== IF_IDE
&& heads
> 16)) {
341 error_report("invalid physical heads number");
344 if (secs
< 1 || (type
== IF_IDE
&& secs
> 63)) {
345 error_report("invalid physical secs number");
350 if ((buf
= qemu_opt_get(opts
, "trans")) != NULL
) {
352 error_report("'%s' trans must be used with cyls, heads and secs",
356 if (!strcmp(buf
, "none"))
357 translation
= BIOS_ATA_TRANSLATION_NONE
;
358 else if (!strcmp(buf
, "lba"))
359 translation
= BIOS_ATA_TRANSLATION_LBA
;
360 else if (!strcmp(buf
, "auto"))
361 translation
= BIOS_ATA_TRANSLATION_AUTO
;
363 error_report("'%s' invalid translation type", buf
);
368 if ((buf
= qemu_opt_get(opts
, "media")) != NULL
) {
369 if (!strcmp(buf
, "disk")) {
371 } else if (!strcmp(buf
, "cdrom")) {
372 if (cyls
|| secs
|| heads
) {
373 error_report("CHS can't be set with media=%s", buf
);
378 error_report("'%s' invalid media", buf
);
383 if ((buf
= qemu_opt_get(opts
, "cache")) != NULL
) {
384 if (bdrv_parse_cache_flags(buf
, &bdrv_flags
) != 0) {
385 error_report("invalid cache option");
390 #ifdef CONFIG_LINUX_AIO
391 if ((buf
= qemu_opt_get(opts
, "aio")) != NULL
) {
392 if (!strcmp(buf
, "native")) {
393 bdrv_flags
|= BDRV_O_NATIVE_AIO
;
394 } else if (!strcmp(buf
, "threads")) {
395 /* this is the default */
397 error_report("invalid aio option");
403 if ((buf
= qemu_opt_get(opts
, "format")) != NULL
) {
404 if (strcmp(buf
, "?") == 0) {
405 error_printf("Supported formats:");
406 bdrv_iterate_format(bdrv_format_print
, NULL
);
410 drv
= bdrv_find_whitelisted_format(buf
);
412 error_report("'%s' invalid format", buf
);
417 /* disk I/O throttling */
418 io_limits
.bps
[BLOCK_IO_LIMIT_TOTAL
] =
419 qemu_opt_get_number(opts
, "bps", 0);
420 io_limits
.bps
[BLOCK_IO_LIMIT_READ
] =
421 qemu_opt_get_number(opts
, "bps_rd", 0);
422 io_limits
.bps
[BLOCK_IO_LIMIT_WRITE
] =
423 qemu_opt_get_number(opts
, "bps_wr", 0);
424 io_limits
.iops
[BLOCK_IO_LIMIT_TOTAL
] =
425 qemu_opt_get_number(opts
, "iops", 0);
426 io_limits
.iops
[BLOCK_IO_LIMIT_READ
] =
427 qemu_opt_get_number(opts
, "iops_rd", 0);
428 io_limits
.iops
[BLOCK_IO_LIMIT_WRITE
] =
429 qemu_opt_get_number(opts
, "iops_wr", 0);
431 if (!do_check_io_limits(&io_limits
)) {
432 error_report("bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) "
433 "cannot be used at the same time");
437 if (qemu_opt_get(opts
, "boot") != NULL
) {
438 fprintf(stderr
, "qemu-kvm: boot=on|off is deprecated and will be "
439 "ignored. Future versions will reject this parameter. Please "
440 "update your scripts.\n");
443 on_write_error
= BLOCK_ERR_STOP_ENOSPC
;
444 if ((buf
= qemu_opt_get(opts
, "werror")) != NULL
) {
445 if (type
!= IF_IDE
&& type
!= IF_SCSI
&& type
!= IF_VIRTIO
&& type
!= IF_NONE
) {
446 error_report("werror is not supported by this bus type");
450 on_write_error
= parse_block_error_action(buf
, 0);
451 if (on_write_error
< 0) {
456 on_read_error
= BLOCK_ERR_REPORT
;
457 if ((buf
= qemu_opt_get(opts
, "rerror")) != NULL
) {
458 if (type
!= IF_IDE
&& type
!= IF_VIRTIO
&& type
!= IF_SCSI
&& type
!= IF_NONE
) {
459 error_report("rerror is not supported by this bus type");
463 on_read_error
= parse_block_error_action(buf
, 1);
464 if (on_read_error
< 0) {
469 if ((devaddr
= qemu_opt_get(opts
, "addr")) != NULL
) {
470 if (type
!= IF_VIRTIO
) {
471 error_report("addr is not supported by this bus type");
476 /* compute bus and unit according index */
479 if (bus_id
!= 0 || unit_id
!= -1) {
480 error_report("index cannot be used with bus and unit");
483 bus_id
= drive_index_to_bus_id(type
, index
);
484 unit_id
= drive_index_to_unit_id(type
, index
);
487 /* if user doesn't specify a unit_id,
488 * try to find the first free
493 while (drive_get(type
, bus_id
, unit_id
) != NULL
) {
495 if (max_devs
&& unit_id
>= max_devs
) {
504 if (max_devs
&& unit_id
>= max_devs
) {
505 error_report("unit %d too big (max is %d)",
506 unit_id
, max_devs
- 1);
511 * catch multiple definitions
514 if (drive_get(type
, bus_id
, unit_id
) != NULL
) {
515 error_report("drive with bus=%d, unit=%d (index=%d) exists",
516 bus_id
, unit_id
, index
);
522 dinfo
= g_malloc0(sizeof(*dinfo
));
523 if ((buf
= qemu_opts_id(opts
)) != NULL
) {
524 dinfo
->id
= g_strdup(buf
);
526 /* no id supplied -> create one */
527 dinfo
->id
= g_malloc0(32);
528 if (type
== IF_IDE
|| type
== IF_SCSI
)
529 mediastr
= (media
== MEDIA_CDROM
) ? "-cd" : "-hd";
531 snprintf(dinfo
->id
, 32, "%s%i%s%i",
532 devname
, bus_id
, mediastr
, unit_id
);
534 snprintf(dinfo
->id
, 32, "%s%s%i",
535 devname
, mediastr
, unit_id
);
537 dinfo
->bdrv
= bdrv_new(dinfo
->id
);
538 dinfo
->devaddr
= devaddr
;
541 dinfo
->unit
= unit_id
;
545 pstrcpy(dinfo
->serial
, sizeof(dinfo
->serial
), serial
);
547 QTAILQ_INSERT_TAIL(&drives
, dinfo
, next
);
549 bdrv_set_on_error(dinfo
->bdrv
, on_read_error
, on_write_error
);
551 /* disk I/O throttling */
552 bdrv_set_io_limits(dinfo
->bdrv
, &io_limits
);
562 bdrv_set_geometry_hint(dinfo
->bdrv
, cyls
, heads
, secs
);
563 bdrv_set_translation_hint(dinfo
->bdrv
, translation
);
577 /* add virtio block device */
578 opts
= qemu_opts_create(qemu_find_opts("device"), NULL
, 0, NULL
);
579 if (arch_type
== QEMU_ARCH_S390X
) {
580 qemu_opt_set(opts
, "driver", "virtio-blk-s390");
582 qemu_opt_set(opts
, "driver", "virtio-blk-pci");
584 qemu_opt_set(opts
, "drive", dinfo
->id
);
586 qemu_opt_set(opts
, "addr", devaddr
);
591 if (!file
|| !*file
) {
595 /* always use cache=unsafe with snapshot */
596 bdrv_flags
&= ~BDRV_O_CACHE_MASK
;
597 bdrv_flags
|= (BDRV_O_SNAPSHOT
|BDRV_O_CACHE_WB
|BDRV_O_NO_FLUSH
);
601 bdrv_flags
|= BDRV_O_COPY_ON_READ
;
604 if (runstate_check(RUN_STATE_INMIGRATE
)) {
605 bdrv_flags
|= BDRV_O_INCOMING
;
608 if (media
== MEDIA_CDROM
) {
609 /* CDROM is fine for any interface, don't check. */
611 } else if (ro
== 1) {
612 if (type
!= IF_SCSI
&& type
!= IF_VIRTIO
&& type
!= IF_FLOPPY
&&
613 type
!= IF_NONE
&& type
!= IF_PFLASH
) {
614 error_report("readonly not supported by this bus type");
619 bdrv_flags
|= ro
? 0 : BDRV_O_RDWR
;
621 ret
= bdrv_open(dinfo
->bdrv
, file
, bdrv_flags
, drv
);
623 error_report("could not open disk image %s: %s",
624 file
, strerror(-ret
));
628 if (bdrv_key_required(dinfo
->bdrv
))
633 bdrv_delete(dinfo
->bdrv
);
635 QTAILQ_REMOVE(&drives
, dinfo
, next
);
640 void do_commit(Monitor
*mon
, const QDict
*qdict
)
642 const char *device
= qdict_get_str(qdict
, "device");
643 BlockDriverState
*bs
;
646 if (!strcmp(device
, "all")) {
647 ret
= bdrv_commit_all();
649 qerror_report(QERR_DEVICE_IN_USE
, device
);
653 bs
= bdrv_find(device
);
655 qerror_report(QERR_DEVICE_NOT_FOUND
, device
);
658 ret
= bdrv_commit(bs
);
660 qerror_report(QERR_DEVICE_IN_USE
, device
);
666 static void blockdev_do_action(int kind
, void *data
, Error
**errp
)
668 BlockdevAction action
;
669 BlockdevActionList list
;
673 list
.value
= &action
;
675 qmp_transaction(&list
, errp
);
678 void qmp_blockdev_snapshot_sync(const char *device
, const char *snapshot_file
,
679 bool has_format
, const char *format
,
680 bool has_mode
, enum NewImageMode mode
,
683 BlockdevSnapshot snapshot
= {
684 .device
= (char *) device
,
685 .snapshot_file
= (char *) snapshot_file
,
686 .has_format
= has_format
,
687 .format
= (char *) format
,
688 .has_mode
= has_mode
,
691 blockdev_do_action(BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
, &snapshot
,
696 /* New and old BlockDriverState structs for group snapshots */
697 typedef struct BlkTransactionStates
{
698 BlockDriverState
*old_bs
;
699 BlockDriverState
*new_bs
;
700 QSIMPLEQ_ENTRY(BlkTransactionStates
) entry
;
701 } BlkTransactionStates
;
704 * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
705 * then we do not pivot any of the devices in the group, and abandon the
708 void qmp_transaction(BlockdevActionList
*dev_list
, Error
**errp
)
711 BlockdevActionList
*dev_entry
= dev_list
;
712 BlkTransactionStates
*states
, *next
;
714 QSIMPLEQ_HEAD(snap_bdrv_states
, BlkTransactionStates
) snap_bdrv_states
;
715 QSIMPLEQ_INIT(&snap_bdrv_states
);
717 /* drain all i/o before any snapshots */
720 /* We don't do anything in this loop that commits us to the snapshot */
721 while (NULL
!= dev_entry
) {
722 BlockdevAction
*dev_info
= NULL
;
723 BlockDriver
*proto_drv
;
726 enum NewImageMode mode
;
727 const char *new_image_file
;
729 const char *format
= "qcow2";
731 dev_info
= dev_entry
->value
;
732 dev_entry
= dev_entry
->next
;
734 states
= g_malloc0(sizeof(BlkTransactionStates
));
735 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states
, states
, entry
);
737 switch (dev_info
->kind
) {
738 case BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
:
739 device
= dev_info
->blockdev_snapshot_sync
->device
;
740 if (!dev_info
->blockdev_snapshot_sync
->has_mode
) {
741 dev_info
->blockdev_snapshot_sync
->mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
743 new_image_file
= dev_info
->blockdev_snapshot_sync
->snapshot_file
;
744 if (dev_info
->blockdev_snapshot_sync
->has_format
) {
745 format
= dev_info
->blockdev_snapshot_sync
->format
;
747 mode
= dev_info
->blockdev_snapshot_sync
->mode
;
753 drv
= bdrv_find_format(format
);
755 error_set(errp
, QERR_INVALID_BLOCK_FORMAT
, format
);
756 goto delete_and_fail
;
759 states
->old_bs
= bdrv_find(device
);
760 if (!states
->old_bs
) {
761 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
762 goto delete_and_fail
;
765 if (!bdrv_is_inserted(states
->old_bs
)) {
766 error_set(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
767 goto delete_and_fail
;
770 if (bdrv_in_use(states
->old_bs
)) {
771 error_set(errp
, QERR_DEVICE_IN_USE
, device
);
772 goto delete_and_fail
;
775 if (!bdrv_is_read_only(states
->old_bs
)) {
776 if (bdrv_flush(states
->old_bs
)) {
777 error_set(errp
, QERR_IO_ERROR
);
778 goto delete_and_fail
;
782 flags
= states
->old_bs
->open_flags
;
784 proto_drv
= bdrv_find_protocol(new_image_file
);
786 error_set(errp
, QERR_INVALID_BLOCK_FORMAT
, format
);
787 goto delete_and_fail
;
790 /* create new image w/backing file */
791 if (mode
!= NEW_IMAGE_MODE_EXISTING
) {
792 ret
= bdrv_img_create(new_image_file
, format
,
793 states
->old_bs
->filename
,
794 states
->old_bs
->drv
->format_name
,
797 error_set(errp
, QERR_OPEN_FILE_FAILED
, new_image_file
);
798 goto delete_and_fail
;
802 /* We will manually add the backing_hd field to the bs later */
803 states
->new_bs
= bdrv_new("");
804 ret
= bdrv_open(states
->new_bs
, new_image_file
,
805 flags
| BDRV_O_NO_BACKING
, drv
);
807 error_set(errp
, QERR_OPEN_FILE_FAILED
, new_image_file
);
808 goto delete_and_fail
;
813 /* Now we are going to do the actual pivot. Everything up to this point
814 * is reversible, but we are committed at this point */
815 QSIMPLEQ_FOREACH(states
, &snap_bdrv_states
, entry
) {
816 /* This removes our old bs from the bdrv_states, and adds the new bs */
817 bdrv_append(states
->new_bs
, states
->old_bs
);
825 * failure, and it is all-or-none; abandon each new bs, and keep using
826 * the original bs for all images
828 QSIMPLEQ_FOREACH(states
, &snap_bdrv_states
, entry
) {
829 if (states
->new_bs
) {
830 bdrv_delete(states
->new_bs
);
834 QSIMPLEQ_FOREACH_SAFE(states
, &snap_bdrv_states
, entry
, next
) {
841 static void eject_device(BlockDriverState
*bs
, int force
, Error
**errp
)
843 if (bdrv_in_use(bs
)) {
844 error_set(errp
, QERR_DEVICE_IN_USE
, bdrv_get_device_name(bs
));
847 if (!bdrv_dev_has_removable_media(bs
)) {
848 error_set(errp
, QERR_DEVICE_NOT_REMOVABLE
, bdrv_get_device_name(bs
));
852 if (bdrv_dev_is_medium_locked(bs
) && !bdrv_dev_is_tray_open(bs
)) {
853 bdrv_dev_eject_request(bs
, force
);
855 error_set(errp
, QERR_DEVICE_LOCKED
, bdrv_get_device_name(bs
));
863 void qmp_eject(const char *device
, bool has_force
, bool force
, Error
**errp
)
865 BlockDriverState
*bs
;
867 bs
= bdrv_find(device
);
869 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
873 eject_device(bs
, force
, errp
);
876 void qmp_block_passwd(const char *device
, const char *password
, Error
**errp
)
878 BlockDriverState
*bs
;
881 bs
= bdrv_find(device
);
883 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
887 err
= bdrv_set_key(bs
, password
);
888 if (err
== -EINVAL
) {
889 error_set(errp
, QERR_DEVICE_NOT_ENCRYPTED
, bdrv_get_device_name(bs
));
891 } else if (err
< 0) {
892 error_set(errp
, QERR_INVALID_PASSWORD
);
897 static void qmp_bdrv_open_encrypted(BlockDriverState
*bs
, const char *filename
,
898 int bdrv_flags
, BlockDriver
*drv
,
899 const char *password
, Error
**errp
)
901 if (bdrv_open(bs
, filename
, bdrv_flags
, drv
) < 0) {
902 error_set(errp
, QERR_OPEN_FILE_FAILED
, filename
);
906 if (bdrv_key_required(bs
)) {
908 if (bdrv_set_key(bs
, password
) < 0) {
909 error_set(errp
, QERR_INVALID_PASSWORD
);
912 error_set(errp
, QERR_DEVICE_ENCRYPTED
, bdrv_get_device_name(bs
),
913 bdrv_get_encrypted_filename(bs
));
915 } else if (password
) {
916 error_set(errp
, QERR_DEVICE_NOT_ENCRYPTED
, bdrv_get_device_name(bs
));
920 void qmp_change_blockdev(const char *device
, const char *filename
,
921 bool has_format
, const char *format
, Error
**errp
)
923 BlockDriverState
*bs
;
924 BlockDriver
*drv
= NULL
;
928 bs
= bdrv_find(device
);
930 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
935 drv
= bdrv_find_whitelisted_format(format
);
937 error_set(errp
, QERR_INVALID_BLOCK_FORMAT
, format
);
942 eject_device(bs
, 0, &err
);
943 if (error_is_set(&err
)) {
944 error_propagate(errp
, err
);
948 bdrv_flags
= bdrv_is_read_only(bs
) ? 0 : BDRV_O_RDWR
;
949 bdrv_flags
|= bdrv_is_snapshot(bs
) ? BDRV_O_SNAPSHOT
: 0;
951 qmp_bdrv_open_encrypted(bs
, filename
, bdrv_flags
, drv
, NULL
, errp
);
954 /* throttling disk I/O limits */
955 void qmp_block_set_io_throttle(const char *device
, int64_t bps
, int64_t bps_rd
,
956 int64_t bps_wr
, int64_t iops
, int64_t iops_rd
,
957 int64_t iops_wr
, Error
**errp
)
959 BlockIOLimit io_limits
;
960 BlockDriverState
*bs
;
962 bs
= bdrv_find(device
);
964 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
968 io_limits
.bps
[BLOCK_IO_LIMIT_TOTAL
] = bps
;
969 io_limits
.bps
[BLOCK_IO_LIMIT_READ
] = bps_rd
;
970 io_limits
.bps
[BLOCK_IO_LIMIT_WRITE
] = bps_wr
;
971 io_limits
.iops
[BLOCK_IO_LIMIT_TOTAL
]= iops
;
972 io_limits
.iops
[BLOCK_IO_LIMIT_READ
] = iops_rd
;
973 io_limits
.iops
[BLOCK_IO_LIMIT_WRITE
]= iops_wr
;
975 if (!do_check_io_limits(&io_limits
)) {
976 error_set(errp
, QERR_INVALID_PARAMETER_COMBINATION
);
980 bs
->io_limits
= io_limits
;
981 bs
->slice_time
= BLOCK_IO_SLICE_TIME
;
983 if (!bs
->io_limits_enabled
&& bdrv_io_limits_enabled(bs
)) {
984 bdrv_io_limits_enable(bs
);
985 } else if (bs
->io_limits_enabled
&& !bdrv_io_limits_enabled(bs
)) {
986 bdrv_io_limits_disable(bs
);
988 if (bs
->block_timer
) {
989 qemu_mod_timer(bs
->block_timer
, qemu_get_clock_ns(vm_clock
));
994 int do_drive_del(Monitor
*mon
, const QDict
*qdict
, QObject
**ret_data
)
996 const char *id
= qdict_get_str(qdict
, "id");
997 BlockDriverState
*bs
;
1001 qerror_report(QERR_DEVICE_NOT_FOUND
, id
);
1004 if (bdrv_in_use(bs
)) {
1005 qerror_report(QERR_DEVICE_IN_USE
, id
);
1009 /* quiesce block driver; prevent further io */
1014 /* if we have a device attached to this BlockDriverState
1015 * then we need to make the drive anonymous until the device
1016 * can be removed. If this is a drive with no device backing
1017 * then we can just get rid of the block driver state right here.
1019 if (bdrv_get_attached_dev(bs
)) {
1022 drive_uninit(drive_get_by_blockdev(bs
));
1028 void qmp_block_resize(const char *device
, int64_t size
, Error
**errp
)
1030 BlockDriverState
*bs
;
1032 bs
= bdrv_find(device
);
1034 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
1039 error_set(errp
, QERR_INVALID_PARAMETER_VALUE
, "size", "a >0 size");
1043 switch (bdrv_truncate(bs
, size
)) {
1047 error_set(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
1050 error_set(errp
, QERR_UNSUPPORTED
);
1053 error_set(errp
, QERR_DEVICE_IS_READ_ONLY
, device
);
1056 error_set(errp
, QERR_DEVICE_IN_USE
, device
);
1059 error_set(errp
, QERR_UNDEFINED_ERROR
);
1064 static QObject
*qobject_from_block_job(BlockJob
*job
)
1066 return qobject_from_jsonf("{ 'type': %s,"
1068 "'len': %" PRId64
","
1069 "'offset': %" PRId64
","
1070 "'speed': %" PRId64
" }",
1071 job
->job_type
->job_type
,
1072 bdrv_get_device_name(job
->bs
),
1078 static void block_stream_cb(void *opaque
, int ret
)
1080 BlockDriverState
*bs
= opaque
;
1083 trace_block_stream_cb(bs
, bs
->job
, ret
);
1086 obj
= qobject_from_block_job(bs
->job
);
1088 QDict
*dict
= qobject_to_qdict(obj
);
1089 qdict_put(dict
, "error", qstring_from_str(strerror(-ret
)));
1092 if (block_job_is_cancelled(bs
->job
)) {
1093 monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED
, obj
);
1095 monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED
, obj
);
1097 qobject_decref(obj
);
1099 drive_put_ref_bh_schedule(drive_get_by_blockdev(bs
));
1102 void qmp_block_stream(const char *device
, bool has_base
,
1103 const char *base
, bool has_speed
,
1104 int64_t speed
, Error
**errp
)
1106 BlockDriverState
*bs
;
1107 BlockDriverState
*base_bs
= NULL
;
1108 Error
*local_err
= NULL
;
1110 bs
= bdrv_find(device
);
1112 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
1117 base_bs
= bdrv_find_backing_image(bs
, base
);
1118 if (base_bs
== NULL
) {
1119 error_set(errp
, QERR_BASE_NOT_FOUND
, base
);
1124 stream_start(bs
, base_bs
, base
, has_speed
? speed
: 0,
1125 block_stream_cb
, bs
, &local_err
);
1126 if (error_is_set(&local_err
)) {
1127 error_propagate(errp
, local_err
);
1131 /* Grab a reference so hotplug does not delete the BlockDriverState from
1134 drive_get_ref(drive_get_by_blockdev(bs
));
1136 trace_qmp_block_stream(bs
, bs
->job
);
1139 static BlockJob
*find_block_job(const char *device
)
1141 BlockDriverState
*bs
;
1143 bs
= bdrv_find(device
);
1144 if (!bs
|| !bs
->job
) {
1150 void qmp_block_job_set_speed(const char *device
, int64_t speed
, Error
**errp
)
1152 BlockJob
*job
= find_block_job(device
);
1155 error_set(errp
, QERR_DEVICE_NOT_ACTIVE
, device
);
1159 block_job_set_speed(job
, speed
, errp
);
1162 void qmp_block_job_cancel(const char *device
, Error
**errp
)
1164 BlockJob
*job
= find_block_job(device
);
1167 error_set(errp
, QERR_DEVICE_NOT_ACTIVE
, device
);
1171 trace_qmp_block_job_cancel(job
);
1172 block_job_cancel(job
);
1175 static void do_qmp_query_block_jobs_one(void *opaque
, BlockDriverState
*bs
)
1177 BlockJobInfoList
**prev
= opaque
;
1178 BlockJob
*job
= bs
->job
;
1181 BlockJobInfoList
*elem
;
1182 BlockJobInfo
*info
= g_new(BlockJobInfo
, 1);
1183 *info
= (BlockJobInfo
){
1184 .type
= g_strdup(job
->job_type
->job_type
),
1185 .device
= g_strdup(bdrv_get_device_name(bs
)),
1187 .offset
= job
->offset
,
1188 .speed
= job
->speed
,
1191 elem
= g_new0(BlockJobInfoList
, 1);
1194 (*prev
)->next
= elem
;
1199 BlockJobInfoList
*qmp_query_block_jobs(Error
**errp
)
1201 /* Dummy is a fake list element for holding the head pointer */
1202 BlockJobInfoList dummy
= {};
1203 BlockJobInfoList
*prev
= &dummy
;
1204 bdrv_iterate(do_qmp_query_block_jobs_one
, &prev
);