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.
9 * This file incorporates work covered by the following copyright and
12 * Copyright (c) 2003-2008 Fabrice Bellard
14 * Permission is hereby granted, free of charge, to any person obtaining a copy
15 * of this software and associated documentation files (the "Software"), to deal
16 * in the Software without restriction, including without limitation the rights
17 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
18 * copies of the Software, and to permit persons to whom the Software is
19 * furnished to do so, subject to the following conditions:
21 * The above copyright notice and this permission notice shall be included in
22 * all copies or substantial portions of the Software.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
27 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
28 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
29 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
33 #include "sysemu/blockdev.h"
34 #include "hw/block/block.h"
35 #include "block/blockjob.h"
36 #include "monitor/monitor.h"
37 #include "qapi/qmp/qerror.h"
38 #include "qemu/option.h"
39 #include "qemu/config-file.h"
40 #include "qapi/qmp/types.h"
41 #include "sysemu/sysemu.h"
42 #include "block/block_int.h"
43 #include "qmp-commands.h"
45 #include "sysemu/arch_init.h"
47 static QTAILQ_HEAD(drivelist
, DriveInfo
) drives
= QTAILQ_HEAD_INITIALIZER(drives
);
48 extern QemuOptsList qemu_common_drive_opts
;
50 static const char *const if_name
[IF_COUNT
] = {
54 [IF_FLOPPY
] = "floppy",
55 [IF_PFLASH
] = "pflash",
58 [IF_VIRTIO
] = "virtio",
62 static const int if_max_devs
[IF_COUNT
] = {
64 * Do not change these numbers! They govern how drive option
65 * index maps to unit and bus. That mapping is ABI.
67 * All controllers used to imlement if=T drives need to support
68 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
69 * Otherwise, some index values map to "impossible" bus, unit
72 * For instance, if you change [IF_SCSI] to 255, -drive
73 * if=scsi,index=12 no longer means bus=1,unit=5, but
74 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
75 * the drive can't be set up. Regression.
82 * We automatically delete the drive when a device using it gets
83 * unplugged. Questionable feature, but we can't just drop it.
84 * Device models call blockdev_mark_auto_del() to schedule the
85 * automatic deletion, and generic qdev code calls blockdev_auto_del()
86 * when deletion is actually safe.
88 void blockdev_mark_auto_del(BlockDriverState
*bs
)
90 DriveInfo
*dinfo
= drive_get_by_blockdev(bs
);
93 block_job_cancel(bs
->job
);
100 void blockdev_auto_del(BlockDriverState
*bs
)
102 DriveInfo
*dinfo
= drive_get_by_blockdev(bs
);
104 if (dinfo
&& dinfo
->auto_del
) {
105 drive_put_ref(dinfo
);
109 static int drive_index_to_bus_id(BlockInterfaceType type
, int index
)
111 int max_devs
= if_max_devs
[type
];
112 return max_devs
? index
/ max_devs
: 0;
115 static int drive_index_to_unit_id(BlockInterfaceType type
, int index
)
117 int max_devs
= if_max_devs
[type
];
118 return max_devs
? index
% max_devs
: index
;
121 QemuOpts
*drive_def(const char *optstr
)
123 return qemu_opts_parse(qemu_find_opts("drive"), optstr
, 0);
126 QemuOpts
*drive_add(BlockInterfaceType type
, int index
, const char *file
,
132 opts
= drive_def(optstr
);
136 if (type
!= IF_DEFAULT
) {
137 qemu_opt_set(opts
, "if", if_name
[type
]);
140 snprintf(buf
, sizeof(buf
), "%d", index
);
141 qemu_opt_set(opts
, "index", buf
);
144 qemu_opt_set(opts
, "file", file
);
148 DriveInfo
*drive_get(BlockInterfaceType type
, int bus
, int unit
)
152 /* seek interface, bus and unit */
154 QTAILQ_FOREACH(dinfo
, &drives
, next
) {
155 if (dinfo
->type
== type
&&
164 DriveInfo
*drive_get_by_index(BlockInterfaceType type
, int index
)
166 return drive_get(type
,
167 drive_index_to_bus_id(type
, index
),
168 drive_index_to_unit_id(type
, index
));
171 int drive_get_max_bus(BlockInterfaceType type
)
177 QTAILQ_FOREACH(dinfo
, &drives
, next
) {
178 if(dinfo
->type
== type
&&
179 dinfo
->bus
> max_bus
)
180 max_bus
= dinfo
->bus
;
185 /* Get a block device. This should only be used for single-drive devices
186 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
188 DriveInfo
*drive_get_next(BlockInterfaceType type
)
190 static int next_block_unit
[IF_COUNT
];
192 return drive_get(type
, 0, next_block_unit
[type
]++);
195 DriveInfo
*drive_get_by_blockdev(BlockDriverState
*bs
)
199 QTAILQ_FOREACH(dinfo
, &drives
, next
) {
200 if (dinfo
->bdrv
== bs
) {
207 static void bdrv_format_print(void *opaque
, const char *name
)
209 error_printf(" %s", name
);
212 static void drive_uninit(DriveInfo
*dinfo
)
214 qemu_opts_del(dinfo
->opts
);
215 bdrv_delete(dinfo
->bdrv
);
217 QTAILQ_REMOVE(&drives
, dinfo
, next
);
218 g_free(dinfo
->serial
);
222 void drive_put_ref(DriveInfo
*dinfo
)
224 assert(dinfo
->refcount
);
225 if (--dinfo
->refcount
== 0) {
230 void drive_get_ref(DriveInfo
*dinfo
)
240 static void drive_put_ref_bh(void *opaque
)
242 DrivePutRefBH
*s
= opaque
;
244 drive_put_ref(s
->dinfo
);
245 qemu_bh_delete(s
->bh
);
250 * Release a drive reference in a BH
252 * It is not possible to use drive_put_ref() from a callback function when the
253 * callers still need the drive. In such cases we schedule a BH to release the
256 static void drive_put_ref_bh_schedule(DriveInfo
*dinfo
)
260 s
= g_new(DrivePutRefBH
, 1);
261 s
->bh
= qemu_bh_new(drive_put_ref_bh
, s
);
263 qemu_bh_schedule(s
->bh
);
266 static int parse_block_error_action(const char *buf
, bool is_read
)
268 if (!strcmp(buf
, "ignore")) {
269 return BLOCKDEV_ON_ERROR_IGNORE
;
270 } else if (!is_read
&& !strcmp(buf
, "enospc")) {
271 return BLOCKDEV_ON_ERROR_ENOSPC
;
272 } else if (!strcmp(buf
, "stop")) {
273 return BLOCKDEV_ON_ERROR_STOP
;
274 } else if (!strcmp(buf
, "report")) {
275 return BLOCKDEV_ON_ERROR_REPORT
;
277 error_report("'%s' invalid %s error action",
278 buf
, is_read
? "read" : "write");
283 static bool do_check_io_limits(BlockIOLimit
*io_limits
, Error
**errp
)
290 bps_flag
= (io_limits
->bps
[BLOCK_IO_LIMIT_TOTAL
] != 0)
291 && ((io_limits
->bps
[BLOCK_IO_LIMIT_READ
] != 0)
292 || (io_limits
->bps
[BLOCK_IO_LIMIT_WRITE
] != 0));
293 iops_flag
= (io_limits
->iops
[BLOCK_IO_LIMIT_TOTAL
] != 0)
294 && ((io_limits
->iops
[BLOCK_IO_LIMIT_READ
] != 0)
295 || (io_limits
->iops
[BLOCK_IO_LIMIT_WRITE
] != 0));
296 if (bps_flag
|| iops_flag
) {
297 error_setg(errp
, "bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) "
298 "cannot be used at the same time");
302 if (io_limits
->bps
[BLOCK_IO_LIMIT_TOTAL
] < 0 ||
303 io_limits
->bps
[BLOCK_IO_LIMIT_WRITE
] < 0 ||
304 io_limits
->bps
[BLOCK_IO_LIMIT_READ
] < 0 ||
305 io_limits
->iops
[BLOCK_IO_LIMIT_TOTAL
] < 0 ||
306 io_limits
->iops
[BLOCK_IO_LIMIT_WRITE
] < 0 ||
307 io_limits
->iops
[BLOCK_IO_LIMIT_READ
] < 0) {
308 error_setg(errp
, "bps and iops values must be 0 or greater");
315 DriveInfo
*drive_init(QemuOpts
*all_opts
, BlockInterfaceType block_default_type
)
318 const char *file
= NULL
;
320 const char *mediastr
= "";
321 BlockInterfaceType type
;
322 enum { MEDIA_DISK
, MEDIA_CDROM
} media
;
324 int cyls
, heads
, secs
, translation
;
325 BlockDriver
*drv
= NULL
;
330 int on_read_error
, on_write_error
;
333 BlockIOLimit io_limits
;
342 translation
= BIOS_ATA_TRANSLATION_AUTO
;
345 /* Check common options by copying from all_opts to opts, all other options
346 * are stored in bs_opts. */
347 id
= qemu_opts_id(all_opts
);
348 opts
= qemu_opts_create(&qemu_common_drive_opts
, id
, 1, &error
);
349 if (error_is_set(&error
)) {
350 qerror_report_err(error
);
355 bs_opts
= qdict_new();
356 qemu_opts_to_qdict(all_opts
, bs_opts
);
357 qemu_opts_absorb_qdict(opts
, bs_opts
, &error
);
358 if (error_is_set(&error
)) {
359 qerror_report_err(error
);
365 qdict_del(bs_opts
, "id");
368 /* extract parameters */
369 bus_id
= qemu_opt_get_number(opts
, "bus", 0);
370 unit_id
= qemu_opt_get_number(opts
, "unit", -1);
371 index
= qemu_opt_get_number(opts
, "index", -1);
373 cyls
= qemu_opt_get_number(opts
, "cyls", 0);
374 heads
= qemu_opt_get_number(opts
, "heads", 0);
375 secs
= qemu_opt_get_number(opts
, "secs", 0);
377 snapshot
= qemu_opt_get_bool(opts
, "snapshot", 0);
378 ro
= qemu_opt_get_bool(opts
, "readonly", 0);
379 copy_on_read
= qemu_opt_get_bool(opts
, "copy-on-read", false);
381 file
= qemu_opt_get(opts
, "file");
382 serial
= qemu_opt_get(opts
, "serial");
384 if ((buf
= qemu_opt_get(opts
, "if")) != NULL
) {
385 for (type
= 0; type
< IF_COUNT
&& strcmp(buf
, if_name
[type
]); type
++)
387 if (type
== IF_COUNT
) {
388 error_report("unsupported bus type '%s'", buf
);
392 type
= block_default_type
;
395 max_devs
= if_max_devs
[type
];
397 if (cyls
|| heads
|| secs
) {
399 error_report("invalid physical cyls number");
403 error_report("invalid physical heads number");
407 error_report("invalid physical secs number");
412 if ((buf
= qemu_opt_get(opts
, "trans")) != NULL
) {
414 error_report("'%s' trans must be used with cyls, heads and secs",
418 if (!strcmp(buf
, "none"))
419 translation
= BIOS_ATA_TRANSLATION_NONE
;
420 else if (!strcmp(buf
, "lba"))
421 translation
= BIOS_ATA_TRANSLATION_LBA
;
422 else if (!strcmp(buf
, "auto"))
423 translation
= BIOS_ATA_TRANSLATION_AUTO
;
425 error_report("'%s' invalid translation type", buf
);
430 if ((buf
= qemu_opt_get(opts
, "media")) != NULL
) {
431 if (!strcmp(buf
, "disk")) {
433 } else if (!strcmp(buf
, "cdrom")) {
434 if (cyls
|| secs
|| heads
) {
435 error_report("CHS can't be set with media=%s", buf
);
440 error_report("'%s' invalid media", buf
);
445 if ((buf
= qemu_opt_get(opts
, "discard")) != NULL
) {
446 if (bdrv_parse_discard_flags(buf
, &bdrv_flags
) != 0) {
447 error_report("invalid discard option");
452 bdrv_flags
|= BDRV_O_CACHE_WB
;
453 if ((buf
= qemu_opt_get(opts
, "cache")) != NULL
) {
454 if (bdrv_parse_cache_flags(buf
, &bdrv_flags
) != 0) {
455 error_report("invalid cache option");
460 #ifdef CONFIG_LINUX_AIO
461 if ((buf
= qemu_opt_get(opts
, "aio")) != NULL
) {
462 if (!strcmp(buf
, "native")) {
463 bdrv_flags
|= BDRV_O_NATIVE_AIO
;
464 } else if (!strcmp(buf
, "threads")) {
465 /* this is the default */
467 error_report("invalid aio option");
473 if ((buf
= qemu_opt_get(opts
, "format")) != NULL
) {
474 if (is_help_option(buf
)) {
475 error_printf("Supported formats:");
476 bdrv_iterate_format(bdrv_format_print
, NULL
);
480 drv
= bdrv_find_whitelisted_format(buf
);
482 error_report("'%s' invalid format", buf
);
487 /* disk I/O throttling */
488 io_limits
.bps
[BLOCK_IO_LIMIT_TOTAL
] =
489 qemu_opt_get_number(opts
, "bps", 0);
490 io_limits
.bps
[BLOCK_IO_LIMIT_READ
] =
491 qemu_opt_get_number(opts
, "bps_rd", 0);
492 io_limits
.bps
[BLOCK_IO_LIMIT_WRITE
] =
493 qemu_opt_get_number(opts
, "bps_wr", 0);
494 io_limits
.iops
[BLOCK_IO_LIMIT_TOTAL
] =
495 qemu_opt_get_number(opts
, "iops", 0);
496 io_limits
.iops
[BLOCK_IO_LIMIT_READ
] =
497 qemu_opt_get_number(opts
, "iops_rd", 0);
498 io_limits
.iops
[BLOCK_IO_LIMIT_WRITE
] =
499 qemu_opt_get_number(opts
, "iops_wr", 0);
501 if (!do_check_io_limits(&io_limits
, &error
)) {
502 error_report("%s", error_get_pretty(error
));
507 if (qemu_opt_get(opts
, "boot") != NULL
) {
508 fprintf(stderr
, "qemu-kvm: boot=on|off is deprecated and will be "
509 "ignored. Future versions will reject this parameter. Please "
510 "update your scripts.\n");
513 on_write_error
= BLOCKDEV_ON_ERROR_ENOSPC
;
514 if ((buf
= qemu_opt_get(opts
, "werror")) != NULL
) {
515 if (type
!= IF_IDE
&& type
!= IF_SCSI
&& type
!= IF_VIRTIO
&& type
!= IF_NONE
) {
516 error_report("werror is not supported by this bus type");
520 on_write_error
= parse_block_error_action(buf
, 0);
521 if (on_write_error
< 0) {
526 on_read_error
= BLOCKDEV_ON_ERROR_REPORT
;
527 if ((buf
= qemu_opt_get(opts
, "rerror")) != NULL
) {
528 if (type
!= IF_IDE
&& type
!= IF_VIRTIO
&& type
!= IF_SCSI
&& type
!= IF_NONE
) {
529 error_report("rerror is not supported by this bus type");
533 on_read_error
= parse_block_error_action(buf
, 1);
534 if (on_read_error
< 0) {
539 if ((devaddr
= qemu_opt_get(opts
, "addr")) != NULL
) {
540 if (type
!= IF_VIRTIO
) {
541 error_report("addr is not supported by this bus type");
546 /* compute bus and unit according index */
549 if (bus_id
!= 0 || unit_id
!= -1) {
550 error_report("index cannot be used with bus and unit");
553 bus_id
= drive_index_to_bus_id(type
, index
);
554 unit_id
= drive_index_to_unit_id(type
, index
);
557 /* if user doesn't specify a unit_id,
558 * try to find the first free
563 while (drive_get(type
, bus_id
, unit_id
) != NULL
) {
565 if (max_devs
&& unit_id
>= max_devs
) {
574 if (max_devs
&& unit_id
>= max_devs
) {
575 error_report("unit %d too big (max is %d)",
576 unit_id
, max_devs
- 1);
581 * catch multiple definitions
584 if (drive_get(type
, bus_id
, unit_id
) != NULL
) {
585 error_report("drive with bus=%d, unit=%d (index=%d) exists",
586 bus_id
, unit_id
, index
);
592 dinfo
= g_malloc0(sizeof(*dinfo
));
593 if ((buf
= qemu_opts_id(opts
)) != NULL
) {
594 dinfo
->id
= g_strdup(buf
);
596 /* no id supplied -> create one */
597 dinfo
->id
= g_malloc0(32);
598 if (type
== IF_IDE
|| type
== IF_SCSI
)
599 mediastr
= (media
== MEDIA_CDROM
) ? "-cd" : "-hd";
601 snprintf(dinfo
->id
, 32, "%s%i%s%i",
602 if_name
[type
], bus_id
, mediastr
, unit_id
);
604 snprintf(dinfo
->id
, 32, "%s%s%i",
605 if_name
[type
], mediastr
, unit_id
);
607 dinfo
->bdrv
= bdrv_new(dinfo
->id
);
608 dinfo
->bdrv
->open_flags
= snapshot
? BDRV_O_SNAPSHOT
: 0;
609 dinfo
->bdrv
->read_only
= ro
;
610 dinfo
->devaddr
= devaddr
;
613 dinfo
->unit
= unit_id
;
615 dinfo
->heads
= heads
;
617 dinfo
->trans
= translation
;
618 dinfo
->opts
= all_opts
;
620 if (serial
!= NULL
) {
621 dinfo
->serial
= g_strdup(serial
);
623 QTAILQ_INSERT_TAIL(&drives
, dinfo
, next
);
625 bdrv_set_on_error(dinfo
->bdrv
, on_read_error
, on_write_error
);
627 /* disk I/O throttling */
628 bdrv_set_io_limits(dinfo
->bdrv
, &io_limits
);
635 dinfo
->media_cd
= media
== MEDIA_CDROM
;
644 /* add virtio block device */
646 devopts
= qemu_opts_create_nofail(qemu_find_opts("device"));
647 if (arch_type
== QEMU_ARCH_S390X
) {
648 qemu_opt_set(devopts
, "driver", "virtio-blk-s390");
650 qemu_opt_set(devopts
, "driver", "virtio-blk-pci");
652 qemu_opt_set(devopts
, "drive", dinfo
->id
);
654 qemu_opt_set(devopts
, "addr", devaddr
);
660 if (!file
|| !*file
) {
661 if (qdict_size(bs_opts
)) {
668 /* always use cache=unsafe with snapshot */
669 bdrv_flags
&= ~BDRV_O_CACHE_MASK
;
670 bdrv_flags
|= (BDRV_O_SNAPSHOT
|BDRV_O_CACHE_WB
|BDRV_O_NO_FLUSH
);
674 bdrv_flags
|= BDRV_O_COPY_ON_READ
;
677 if (runstate_check(RUN_STATE_INMIGRATE
)) {
678 bdrv_flags
|= BDRV_O_INCOMING
;
681 if (media
== MEDIA_CDROM
) {
682 /* CDROM is fine for any interface, don't check. */
684 } else if (ro
== 1) {
685 if (type
!= IF_SCSI
&& type
!= IF_VIRTIO
&& type
!= IF_FLOPPY
&&
686 type
!= IF_NONE
&& type
!= IF_PFLASH
) {
687 error_report("readonly not supported by this bus type");
692 bdrv_flags
|= ro
? 0 : BDRV_O_RDWR
;
694 if (ro
&& copy_on_read
) {
695 error_report("warning: disabling copy_on_read on readonly drive");
698 ret
= bdrv_open(dinfo
->bdrv
, file
, bs_opts
, bdrv_flags
, drv
);
702 if (ret
== -EMEDIUMTYPE
) {
703 error_report("could not open disk image %s: not in %s format",
704 file
?: dinfo
->id
, drv
->format_name
);
706 error_report("could not open disk image %s: %s",
707 file
?: dinfo
->id
, strerror(-ret
));
712 if (bdrv_key_required(dinfo
->bdrv
))
722 bdrv_delete(dinfo
->bdrv
);
724 QTAILQ_REMOVE(&drives
, dinfo
, next
);
729 void do_commit(Monitor
*mon
, const QDict
*qdict
)
731 const char *device
= qdict_get_str(qdict
, "device");
732 BlockDriverState
*bs
;
735 if (!strcmp(device
, "all")) {
736 ret
= bdrv_commit_all();
738 bs
= bdrv_find(device
);
740 monitor_printf(mon
, "Device '%s' not found\n", device
);
743 ret
= bdrv_commit(bs
);
746 monitor_printf(mon
, "'commit' error for '%s': %s\n", device
,
751 static void blockdev_do_action(int kind
, void *data
, Error
**errp
)
753 BlockdevAction action
;
754 BlockdevActionList list
;
758 list
.value
= &action
;
760 qmp_transaction(&list
, errp
);
763 void qmp_blockdev_snapshot_sync(const char *device
, const char *snapshot_file
,
764 bool has_format
, const char *format
,
765 bool has_mode
, enum NewImageMode mode
,
768 BlockdevSnapshot snapshot
= {
769 .device
= (char *) device
,
770 .snapshot_file
= (char *) snapshot_file
,
771 .has_format
= has_format
,
772 .format
= (char *) format
,
773 .has_mode
= has_mode
,
776 blockdev_do_action(BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
, &snapshot
,
781 /* New and old BlockDriverState structs for group snapshots */
782 typedef struct BlkTransactionStates
{
783 BlockDriverState
*old_bs
;
784 BlockDriverState
*new_bs
;
785 QSIMPLEQ_ENTRY(BlkTransactionStates
) entry
;
786 } BlkTransactionStates
;
788 static void external_snapshot_prepare(BlockdevAction
*action
,
789 BlkTransactionStates
*states
,
792 BlockDriver
*proto_drv
;
795 Error
*local_err
= NULL
;
797 const char *new_image_file
;
798 const char *format
= "qcow2";
799 enum NewImageMode mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
802 g_assert(action
->kind
== BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
);
804 device
= action
->blockdev_snapshot_sync
->device
;
805 new_image_file
= action
->blockdev_snapshot_sync
->snapshot_file
;
806 if (action
->blockdev_snapshot_sync
->has_format
) {
807 format
= action
->blockdev_snapshot_sync
->format
;
809 if (action
->blockdev_snapshot_sync
->has_mode
) {
810 mode
= action
->blockdev_snapshot_sync
->mode
;
813 /* start processing */
814 drv
= bdrv_find_format(format
);
816 error_set(errp
, QERR_INVALID_BLOCK_FORMAT
, format
);
820 states
->old_bs
= bdrv_find(device
);
821 if (!states
->old_bs
) {
822 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
826 if (!bdrv_is_inserted(states
->old_bs
)) {
827 error_set(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
831 if (bdrv_in_use(states
->old_bs
)) {
832 error_set(errp
, QERR_DEVICE_IN_USE
, device
);
836 if (!bdrv_is_read_only(states
->old_bs
)) {
837 if (bdrv_flush(states
->old_bs
)) {
838 error_set(errp
, QERR_IO_ERROR
);
843 flags
= states
->old_bs
->open_flags
;
845 proto_drv
= bdrv_find_protocol(new_image_file
);
847 error_set(errp
, QERR_INVALID_BLOCK_FORMAT
, format
);
851 /* create new image w/backing file */
852 if (mode
!= NEW_IMAGE_MODE_EXISTING
) {
853 bdrv_img_create(new_image_file
, format
,
854 states
->old_bs
->filename
,
855 states
->old_bs
->drv
->format_name
,
856 NULL
, -1, flags
, &local_err
, false);
857 if (error_is_set(&local_err
)) {
858 error_propagate(errp
, local_err
);
863 /* We will manually add the backing_hd field to the bs later */
864 states
->new_bs
= bdrv_new("");
865 /* TODO Inherit bs->options or only take explicit options with an
866 * extended QMP command? */
867 ret
= bdrv_open(states
->new_bs
, new_image_file
, NULL
,
868 flags
| BDRV_O_NO_BACKING
, drv
);
870 error_set(errp
, QERR_OPEN_FILE_FAILED
, new_image_file
);
875 * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
876 * then we do not pivot any of the devices in the group, and abandon the
879 void qmp_transaction(BlockdevActionList
*dev_list
, Error
**errp
)
881 BlockdevActionList
*dev_entry
= dev_list
;
882 BlkTransactionStates
*states
, *next
;
883 Error
*local_err
= NULL
;
885 QSIMPLEQ_HEAD(snap_bdrv_states
, BlkTransactionStates
) snap_bdrv_states
;
886 QSIMPLEQ_INIT(&snap_bdrv_states
);
888 /* drain all i/o before any snapshots */
891 /* We don't do anything in this loop that commits us to the snapshot */
892 while (NULL
!= dev_entry
) {
893 BlockdevAction
*dev_info
= NULL
;
895 dev_info
= dev_entry
->value
;
896 dev_entry
= dev_entry
->next
;
898 states
= g_malloc0(sizeof(BlkTransactionStates
));
899 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states
, states
, entry
);
901 switch (dev_info
->kind
) {
902 case BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
:
903 external_snapshot_prepare(dev_info
, states
, errp
);
904 if (error_is_set(&local_err
)) {
905 error_propagate(errp
, local_err
);
906 goto delete_and_fail
;
916 /* Now we are going to do the actual pivot. Everything up to this point
917 * is reversible, but we are committed at this point */
918 QSIMPLEQ_FOREACH(states
, &snap_bdrv_states
, entry
) {
919 /* This removes our old bs from the bdrv_states, and adds the new bs */
920 bdrv_append(states
->new_bs
, states
->old_bs
);
921 /* We don't need (or want) to use the transactional
922 * bdrv_reopen_multiple() across all the entries at once, because we
923 * don't want to abort all of them if one of them fails the reopen */
924 bdrv_reopen(states
->new_bs
, states
->new_bs
->open_flags
& ~BDRV_O_RDWR
,
933 * failure, and it is all-or-none; abandon each new bs, and keep using
934 * the original bs for all images
936 QSIMPLEQ_FOREACH(states
, &snap_bdrv_states
, entry
) {
937 if (states
->new_bs
) {
938 bdrv_delete(states
->new_bs
);
942 QSIMPLEQ_FOREACH_SAFE(states
, &snap_bdrv_states
, entry
, next
) {
948 static void eject_device(BlockDriverState
*bs
, int force
, Error
**errp
)
950 if (bdrv_in_use(bs
)) {
951 error_set(errp
, QERR_DEVICE_IN_USE
, bdrv_get_device_name(bs
));
954 if (!bdrv_dev_has_removable_media(bs
)) {
955 error_set(errp
, QERR_DEVICE_NOT_REMOVABLE
, bdrv_get_device_name(bs
));
959 if (bdrv_dev_is_medium_locked(bs
) && !bdrv_dev_is_tray_open(bs
)) {
960 bdrv_dev_eject_request(bs
, force
);
962 error_set(errp
, QERR_DEVICE_LOCKED
, bdrv_get_device_name(bs
));
970 void qmp_eject(const char *device
, bool has_force
, bool force
, Error
**errp
)
972 BlockDriverState
*bs
;
974 bs
= bdrv_find(device
);
976 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
980 eject_device(bs
, force
, errp
);
983 void qmp_block_passwd(const char *device
, const char *password
, Error
**errp
)
985 BlockDriverState
*bs
;
988 bs
= bdrv_find(device
);
990 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
994 err
= bdrv_set_key(bs
, password
);
995 if (err
== -EINVAL
) {
996 error_set(errp
, QERR_DEVICE_NOT_ENCRYPTED
, bdrv_get_device_name(bs
));
998 } else if (err
< 0) {
999 error_set(errp
, QERR_INVALID_PASSWORD
);
1004 static void qmp_bdrv_open_encrypted(BlockDriverState
*bs
, const char *filename
,
1005 int bdrv_flags
, BlockDriver
*drv
,
1006 const char *password
, Error
**errp
)
1008 if (bdrv_open(bs
, filename
, NULL
, bdrv_flags
, drv
) < 0) {
1009 error_set(errp
, QERR_OPEN_FILE_FAILED
, filename
);
1013 if (bdrv_key_required(bs
)) {
1015 if (bdrv_set_key(bs
, password
) < 0) {
1016 error_set(errp
, QERR_INVALID_PASSWORD
);
1019 error_set(errp
, QERR_DEVICE_ENCRYPTED
, bdrv_get_device_name(bs
),
1020 bdrv_get_encrypted_filename(bs
));
1022 } else if (password
) {
1023 error_set(errp
, QERR_DEVICE_NOT_ENCRYPTED
, bdrv_get_device_name(bs
));
1027 void qmp_change_blockdev(const char *device
, const char *filename
,
1028 bool has_format
, const char *format
, Error
**errp
)
1030 BlockDriverState
*bs
;
1031 BlockDriver
*drv
= NULL
;
1035 bs
= bdrv_find(device
);
1037 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
1042 drv
= bdrv_find_whitelisted_format(format
);
1044 error_set(errp
, QERR_INVALID_BLOCK_FORMAT
, format
);
1049 eject_device(bs
, 0, &err
);
1050 if (error_is_set(&err
)) {
1051 error_propagate(errp
, err
);
1055 bdrv_flags
= bdrv_is_read_only(bs
) ? 0 : BDRV_O_RDWR
;
1056 bdrv_flags
|= bdrv_is_snapshot(bs
) ? BDRV_O_SNAPSHOT
: 0;
1058 qmp_bdrv_open_encrypted(bs
, filename
, bdrv_flags
, drv
, NULL
, errp
);
1061 /* throttling disk I/O limits */
1062 void qmp_block_set_io_throttle(const char *device
, int64_t bps
, int64_t bps_rd
,
1063 int64_t bps_wr
, int64_t iops
, int64_t iops_rd
,
1064 int64_t iops_wr
, Error
**errp
)
1066 BlockIOLimit io_limits
;
1067 BlockDriverState
*bs
;
1069 bs
= bdrv_find(device
);
1071 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
1075 io_limits
.bps
[BLOCK_IO_LIMIT_TOTAL
] = bps
;
1076 io_limits
.bps
[BLOCK_IO_LIMIT_READ
] = bps_rd
;
1077 io_limits
.bps
[BLOCK_IO_LIMIT_WRITE
] = bps_wr
;
1078 io_limits
.iops
[BLOCK_IO_LIMIT_TOTAL
]= iops
;
1079 io_limits
.iops
[BLOCK_IO_LIMIT_READ
] = iops_rd
;
1080 io_limits
.iops
[BLOCK_IO_LIMIT_WRITE
]= iops_wr
;
1082 if (!do_check_io_limits(&io_limits
, errp
)) {
1086 bs
->io_limits
= io_limits
;
1088 if (!bs
->io_limits_enabled
&& bdrv_io_limits_enabled(bs
)) {
1089 bdrv_io_limits_enable(bs
);
1090 } else if (bs
->io_limits_enabled
&& !bdrv_io_limits_enabled(bs
)) {
1091 bdrv_io_limits_disable(bs
);
1093 if (bs
->block_timer
) {
1094 qemu_mod_timer(bs
->block_timer
, qemu_get_clock_ns(vm_clock
));
1099 int do_drive_del(Monitor
*mon
, const QDict
*qdict
, QObject
**ret_data
)
1101 const char *id
= qdict_get_str(qdict
, "id");
1102 BlockDriverState
*bs
;
1106 qerror_report(QERR_DEVICE_NOT_FOUND
, id
);
1109 if (bdrv_in_use(bs
)) {
1110 qerror_report(QERR_DEVICE_IN_USE
, id
);
1114 /* quiesce block driver; prevent further io */
1119 /* if we have a device attached to this BlockDriverState
1120 * then we need to make the drive anonymous until the device
1121 * can be removed. If this is a drive with no device backing
1122 * then we can just get rid of the block driver state right here.
1124 if (bdrv_get_attached_dev(bs
)) {
1127 drive_uninit(drive_get_by_blockdev(bs
));
1133 void qmp_block_resize(const char *device
, int64_t size
, Error
**errp
)
1135 BlockDriverState
*bs
;
1138 bs
= bdrv_find(device
);
1140 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
1145 error_set(errp
, QERR_INVALID_PARAMETER_VALUE
, "size", "a >0 size");
1149 /* complete all in-flight operations before resizing the device */
1152 ret
= bdrv_truncate(bs
, size
);
1157 error_set(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
1160 error_set(errp
, QERR_UNSUPPORTED
);
1163 error_set(errp
, QERR_DEVICE_IS_READ_ONLY
, device
);
1166 error_set(errp
, QERR_DEVICE_IN_USE
, device
);
1169 error_setg_errno(errp
, -ret
, "Could not resize");
1174 static void block_job_cb(void *opaque
, int ret
)
1176 BlockDriverState
*bs
= opaque
;
1179 trace_block_job_cb(bs
, bs
->job
, ret
);
1182 obj
= qobject_from_block_job(bs
->job
);
1184 QDict
*dict
= qobject_to_qdict(obj
);
1185 qdict_put(dict
, "error", qstring_from_str(strerror(-ret
)));
1188 if (block_job_is_cancelled(bs
->job
)) {
1189 monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED
, obj
);
1191 monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED
, obj
);
1193 qobject_decref(obj
);
1195 drive_put_ref_bh_schedule(drive_get_by_blockdev(bs
));
1198 void qmp_block_stream(const char *device
, bool has_base
,
1199 const char *base
, bool has_speed
, int64_t speed
,
1200 bool has_on_error
, BlockdevOnError on_error
,
1203 BlockDriverState
*bs
;
1204 BlockDriverState
*base_bs
= NULL
;
1205 Error
*local_err
= NULL
;
1207 if (!has_on_error
) {
1208 on_error
= BLOCKDEV_ON_ERROR_REPORT
;
1211 bs
= bdrv_find(device
);
1213 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
1218 base_bs
= bdrv_find_backing_image(bs
, base
);
1219 if (base_bs
== NULL
) {
1220 error_set(errp
, QERR_BASE_NOT_FOUND
, base
);
1225 stream_start(bs
, base_bs
, base
, has_speed
? speed
: 0,
1226 on_error
, block_job_cb
, bs
, &local_err
);
1227 if (error_is_set(&local_err
)) {
1228 error_propagate(errp
, local_err
);
1232 /* Grab a reference so hotplug does not delete the BlockDriverState from
1235 drive_get_ref(drive_get_by_blockdev(bs
));
1237 trace_qmp_block_stream(bs
, bs
->job
);
1240 void qmp_block_commit(const char *device
,
1241 bool has_base
, const char *base
, const char *top
,
1242 bool has_speed
, int64_t speed
,
1245 BlockDriverState
*bs
;
1246 BlockDriverState
*base_bs
, *top_bs
;
1247 Error
*local_err
= NULL
;
1248 /* This will be part of the QMP command, if/when the
1249 * BlockdevOnError change for blkmirror makes it in
1251 BlockdevOnError on_error
= BLOCKDEV_ON_ERROR_REPORT
;
1253 /* drain all i/o before commits */
1256 bs
= bdrv_find(device
);
1258 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
1262 /* default top_bs is the active layer */
1266 if (strcmp(bs
->filename
, top
) != 0) {
1267 top_bs
= bdrv_find_backing_image(bs
, top
);
1271 if (top_bs
== NULL
) {
1272 error_setg(errp
, "Top image file %s not found", top
? top
: "NULL");
1276 if (has_base
&& base
) {
1277 base_bs
= bdrv_find_backing_image(top_bs
, base
);
1279 base_bs
= bdrv_find_base(top_bs
);
1282 if (base_bs
== NULL
) {
1283 error_set(errp
, QERR_BASE_NOT_FOUND
, base
? base
: "NULL");
1287 commit_start(bs
, base_bs
, top_bs
, speed
, on_error
, block_job_cb
, bs
,
1289 if (local_err
!= NULL
) {
1290 error_propagate(errp
, local_err
);
1293 /* Grab a reference so hotplug does not delete the BlockDriverState from
1296 drive_get_ref(drive_get_by_blockdev(bs
));
1299 #define DEFAULT_MIRROR_BUF_SIZE (10 << 20)
1301 void qmp_drive_mirror(const char *device
, const char *target
,
1302 bool has_format
, const char *format
,
1303 enum MirrorSyncMode sync
,
1304 bool has_mode
, enum NewImageMode mode
,
1305 bool has_speed
, int64_t speed
,
1306 bool has_granularity
, uint32_t granularity
,
1307 bool has_buf_size
, int64_t buf_size
,
1308 bool has_on_source_error
, BlockdevOnError on_source_error
,
1309 bool has_on_target_error
, BlockdevOnError on_target_error
,
1312 BlockDriverState
*bs
;
1313 BlockDriverState
*source
, *target_bs
;
1314 BlockDriver
*proto_drv
;
1315 BlockDriver
*drv
= NULL
;
1316 Error
*local_err
= NULL
;
1324 if (!has_on_source_error
) {
1325 on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
1327 if (!has_on_target_error
) {
1328 on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
1331 mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
1333 if (!has_granularity
) {
1336 if (!has_buf_size
) {
1337 buf_size
= DEFAULT_MIRROR_BUF_SIZE
;
1340 if (granularity
!= 0 && (granularity
< 512 || granularity
> 1048576 * 64)) {
1341 error_set(errp
, QERR_INVALID_PARAMETER
, device
);
1344 if (granularity
& (granularity
- 1)) {
1345 error_set(errp
, QERR_INVALID_PARAMETER
, device
);
1349 bs
= bdrv_find(device
);
1351 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
1355 if (!bdrv_is_inserted(bs
)) {
1356 error_set(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
1361 format
= mode
== NEW_IMAGE_MODE_EXISTING
? NULL
: bs
->drv
->format_name
;
1364 drv
= bdrv_find_format(format
);
1366 error_set(errp
, QERR_INVALID_BLOCK_FORMAT
, format
);
1371 if (bdrv_in_use(bs
)) {
1372 error_set(errp
, QERR_DEVICE_IN_USE
, device
);
1376 flags
= bs
->open_flags
| BDRV_O_RDWR
;
1377 source
= bs
->backing_hd
;
1378 if (!source
&& sync
== MIRROR_SYNC_MODE_TOP
) {
1379 sync
= MIRROR_SYNC_MODE_FULL
;
1382 proto_drv
= bdrv_find_protocol(target
);
1384 error_set(errp
, QERR_INVALID_BLOCK_FORMAT
, format
);
1388 bdrv_get_geometry(bs
, &size
);
1390 if (sync
== MIRROR_SYNC_MODE_FULL
&& mode
!= NEW_IMAGE_MODE_EXISTING
) {
1391 /* create new image w/o backing file */
1392 assert(format
&& drv
);
1393 bdrv_img_create(target
, format
,
1394 NULL
, NULL
, NULL
, size
, flags
, &local_err
, false);
1397 case NEW_IMAGE_MODE_EXISTING
:
1400 case NEW_IMAGE_MODE_ABSOLUTE_PATHS
:
1401 /* create new image with backing file */
1402 bdrv_img_create(target
, format
,
1404 source
->drv
->format_name
,
1405 NULL
, size
, flags
, &local_err
, false);
1412 if (error_is_set(&local_err
)) {
1413 error_propagate(errp
, local_err
);
1417 /* Mirroring takes care of copy-on-write using the source's backing
1420 target_bs
= bdrv_new("");
1421 ret
= bdrv_open(target_bs
, target
, NULL
, flags
| BDRV_O_NO_BACKING
, drv
);
1424 bdrv_delete(target_bs
);
1425 error_set(errp
, QERR_OPEN_FILE_FAILED
, target
);
1429 mirror_start(bs
, target_bs
, speed
, granularity
, buf_size
, sync
,
1430 on_source_error
, on_target_error
,
1431 block_job_cb
, bs
, &local_err
);
1432 if (local_err
!= NULL
) {
1433 bdrv_delete(target_bs
);
1434 error_propagate(errp
, local_err
);
1438 /* Grab a reference so hotplug does not delete the BlockDriverState from
1441 drive_get_ref(drive_get_by_blockdev(bs
));
1444 static BlockJob
*find_block_job(const char *device
)
1446 BlockDriverState
*bs
;
1448 bs
= bdrv_find(device
);
1449 if (!bs
|| !bs
->job
) {
1455 void qmp_block_job_set_speed(const char *device
, int64_t speed
, Error
**errp
)
1457 BlockJob
*job
= find_block_job(device
);
1460 error_set(errp
, QERR_BLOCK_JOB_NOT_ACTIVE
, device
);
1464 block_job_set_speed(job
, speed
, errp
);
1467 void qmp_block_job_cancel(const char *device
,
1468 bool has_force
, bool force
, Error
**errp
)
1470 BlockJob
*job
= find_block_job(device
);
1477 error_set(errp
, QERR_BLOCK_JOB_NOT_ACTIVE
, device
);
1480 if (job
->paused
&& !force
) {
1481 error_set(errp
, QERR_BLOCK_JOB_PAUSED
, device
);
1485 trace_qmp_block_job_cancel(job
);
1486 block_job_cancel(job
);
1489 void qmp_block_job_pause(const char *device
, Error
**errp
)
1491 BlockJob
*job
= find_block_job(device
);
1494 error_set(errp
, QERR_BLOCK_JOB_NOT_ACTIVE
, device
);
1498 trace_qmp_block_job_pause(job
);
1499 block_job_pause(job
);
1502 void qmp_block_job_resume(const char *device
, Error
**errp
)
1504 BlockJob
*job
= find_block_job(device
);
1507 error_set(errp
, QERR_BLOCK_JOB_NOT_ACTIVE
, device
);
1511 trace_qmp_block_job_resume(job
);
1512 block_job_resume(job
);
1515 void qmp_block_job_complete(const char *device
, Error
**errp
)
1517 BlockJob
*job
= find_block_job(device
);
1520 error_set(errp
, QERR_BLOCK_JOB_NOT_ACTIVE
, device
);
1524 trace_qmp_block_job_complete(job
);
1525 block_job_complete(job
, errp
);
1528 static void do_qmp_query_block_jobs_one(void *opaque
, BlockDriverState
*bs
)
1530 BlockJobInfoList
**prev
= opaque
;
1531 BlockJob
*job
= bs
->job
;
1534 BlockJobInfoList
*elem
= g_new0(BlockJobInfoList
, 1);
1535 elem
->value
= block_job_query(bs
->job
);
1536 (*prev
)->next
= elem
;
1541 BlockJobInfoList
*qmp_query_block_jobs(Error
**errp
)
1543 /* Dummy is a fake list element for holding the head pointer */
1544 BlockJobInfoList dummy
= {};
1545 BlockJobInfoList
*prev
= &dummy
;
1546 bdrv_iterate(do_qmp_query_block_jobs_one
, &prev
);
1550 QemuOptsList qemu_common_drive_opts
= {
1552 .head
= QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts
.head
),
1556 .type
= QEMU_OPT_NUMBER
,
1557 .help
= "bus number",
1560 .type
= QEMU_OPT_NUMBER
,
1561 .help
= "unit number (i.e. lun for scsi)",
1564 .type
= QEMU_OPT_STRING
,
1565 .help
= "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
1568 .type
= QEMU_OPT_NUMBER
,
1569 .help
= "index number",
1572 .type
= QEMU_OPT_NUMBER
,
1573 .help
= "number of cylinders (ide disk geometry)",
1576 .type
= QEMU_OPT_NUMBER
,
1577 .help
= "number of heads (ide disk geometry)",
1580 .type
= QEMU_OPT_NUMBER
,
1581 .help
= "number of sectors (ide disk geometry)",
1584 .type
= QEMU_OPT_STRING
,
1585 .help
= "chs translation (auto, lba. none)",
1588 .type
= QEMU_OPT_STRING
,
1589 .help
= "media type (disk, cdrom)",
1592 .type
= QEMU_OPT_BOOL
,
1593 .help
= "enable/disable snapshot mode",
1596 .type
= QEMU_OPT_STRING
,
1597 .help
= "disk image",
1600 .type
= QEMU_OPT_STRING
,
1601 .help
= "discard operation (ignore/off, unmap/on)",
1604 .type
= QEMU_OPT_STRING
,
1605 .help
= "host cache usage (none, writeback, writethrough, "
1606 "directsync, unsafe)",
1609 .type
= QEMU_OPT_STRING
,
1610 .help
= "host AIO implementation (threads, native)",
1613 .type
= QEMU_OPT_STRING
,
1614 .help
= "disk format (raw, qcow2, ...)",
1617 .type
= QEMU_OPT_STRING
,
1618 .help
= "disk serial number",
1621 .type
= QEMU_OPT_STRING
,
1622 .help
= "read error action",
1625 .type
= QEMU_OPT_STRING
,
1626 .help
= "write error action",
1629 .type
= QEMU_OPT_STRING
,
1630 .help
= "pci address (virtio only)",
1633 .type
= QEMU_OPT_BOOL
,
1634 .help
= "open drive file as read-only",
1637 .type
= QEMU_OPT_NUMBER
,
1638 .help
= "limit total I/O operations per second",
1641 .type
= QEMU_OPT_NUMBER
,
1642 .help
= "limit read operations per second",
1645 .type
= QEMU_OPT_NUMBER
,
1646 .help
= "limit write operations per second",
1649 .type
= QEMU_OPT_NUMBER
,
1650 .help
= "limit total bytes per second",
1653 .type
= QEMU_OPT_NUMBER
,
1654 .help
= "limit read bytes per second",
1657 .type
= QEMU_OPT_NUMBER
,
1658 .help
= "limit write bytes per second",
1660 .name
= "copy-on-read",
1661 .type
= QEMU_OPT_BOOL
,
1662 .help
= "copy read data from backing file into image file",
1665 .type
= QEMU_OPT_BOOL
,
1666 .help
= "(deprecated, ignored)",
1668 { /* end of list */ }
1672 QemuOptsList qemu_drive_opts
= {
1674 .head
= QTAILQ_HEAD_INITIALIZER(qemu_drive_opts
.head
),
1678 .type
= QEMU_OPT_NUMBER
,
1679 .help
= "bus number",
1682 .type
= QEMU_OPT_NUMBER
,
1683 .help
= "unit number (i.e. lun for scsi)",
1686 .type
= QEMU_OPT_STRING
,
1687 .help
= "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
1690 .type
= QEMU_OPT_NUMBER
,
1691 .help
= "index number",
1694 .type
= QEMU_OPT_NUMBER
,
1695 .help
= "number of cylinders (ide disk geometry)",
1698 .type
= QEMU_OPT_NUMBER
,
1699 .help
= "number of heads (ide disk geometry)",
1702 .type
= QEMU_OPT_NUMBER
,
1703 .help
= "number of sectors (ide disk geometry)",
1706 .type
= QEMU_OPT_STRING
,
1707 .help
= "chs translation (auto, lba. none)",
1710 .type
= QEMU_OPT_STRING
,
1711 .help
= "media type (disk, cdrom)",
1714 .type
= QEMU_OPT_BOOL
,
1715 .help
= "enable/disable snapshot mode",
1718 .type
= QEMU_OPT_STRING
,
1719 .help
= "disk image",
1722 .type
= QEMU_OPT_STRING
,
1723 .help
= "discard operation (ignore/off, unmap/on)",
1726 .type
= QEMU_OPT_STRING
,
1727 .help
= "host cache usage (none, writeback, writethrough, "
1728 "directsync, unsafe)",
1731 .type
= QEMU_OPT_STRING
,
1732 .help
= "host AIO implementation (threads, native)",
1735 .type
= QEMU_OPT_STRING
,
1736 .help
= "disk format (raw, qcow2, ...)",
1739 .type
= QEMU_OPT_STRING
,
1740 .help
= "disk serial number",
1743 .type
= QEMU_OPT_STRING
,
1744 .help
= "read error action",
1747 .type
= QEMU_OPT_STRING
,
1748 .help
= "write error action",
1751 .type
= QEMU_OPT_STRING
,
1752 .help
= "pci address (virtio only)",
1755 .type
= QEMU_OPT_BOOL
,
1756 .help
= "open drive file as read-only",
1759 .type
= QEMU_OPT_NUMBER
,
1760 .help
= "limit total I/O operations per second",
1763 .type
= QEMU_OPT_NUMBER
,
1764 .help
= "limit read operations per second",
1767 .type
= QEMU_OPT_NUMBER
,
1768 .help
= "limit write operations per second",
1771 .type
= QEMU_OPT_NUMBER
,
1772 .help
= "limit total bytes per second",
1775 .type
= QEMU_OPT_NUMBER
,
1776 .help
= "limit read bytes per second",
1779 .type
= QEMU_OPT_NUMBER
,
1780 .help
= "limit write bytes per second",
1782 .name
= "copy-on-read",
1783 .type
= QEMU_OPT_BOOL
,
1784 .help
= "copy read data from backing file into image file",
1787 .type
= QEMU_OPT_BOOL
,
1788 .help
= "(deprecated, ignored)",
1790 { /* end of list */ }