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/block-backend.h"
34 #include "sysemu/blockdev.h"
35 #include "hw/block/block.h"
36 #include "block/blockjob.h"
37 #include "monitor/monitor.h"
38 #include "qemu/option.h"
39 #include "qemu/config-file.h"
40 #include "qapi/qmp/types.h"
41 #include "qapi-visit.h"
42 #include "qapi/qmp-output-visitor.h"
43 #include "qapi/util.h"
44 #include "sysemu/sysemu.h"
45 #include "block/block_int.h"
46 #include "qmp-commands.h"
48 #include "sysemu/arch_init.h"
50 static const char *const if_name
[IF_COUNT
] = {
54 [IF_FLOPPY
] = "floppy",
55 [IF_PFLASH
] = "pflash",
58 [IF_VIRTIO
] = "virtio",
62 static 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 * Boards may call this to offer board-by-board overrides
83 * of the default, global values.
85 void override_max_devs(BlockInterfaceType type
, int max_devs
)
94 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
95 dinfo
= blk_legacy_dinfo(blk
);
96 if (dinfo
->type
== type
) {
97 fprintf(stderr
, "Cannot override units-per-bus property of"
98 " the %s interface, because a drive of that type has"
99 " already been added.\n", if_name
[type
]);
100 g_assert_not_reached();
104 if_max_devs
[type
] = max_devs
;
108 * We automatically delete the drive when a device using it gets
109 * unplugged. Questionable feature, but we can't just drop it.
110 * Device models call blockdev_mark_auto_del() to schedule the
111 * automatic deletion, and generic qdev code calls blockdev_auto_del()
112 * when deletion is actually safe.
114 void blockdev_mark_auto_del(BlockBackend
*blk
)
116 DriveInfo
*dinfo
= blk_legacy_dinfo(blk
);
117 BlockDriverState
*bs
= blk_bs(blk
);
119 if (dinfo
&& !dinfo
->enable_auto_del
) {
124 block_job_cancel(bs
->job
);
131 void blockdev_auto_del(BlockBackend
*blk
)
133 DriveInfo
*dinfo
= blk_legacy_dinfo(blk
);
135 if (dinfo
&& dinfo
->auto_del
) {
141 * Returns the current mapping of how many units per bus
142 * a particular interface can support.
144 * A positive integer indicates n units per bus.
145 * 0 implies the mapping has not been established.
146 * -1 indicates an invalid BlockInterfaceType was given.
148 int drive_get_max_devs(BlockInterfaceType type
)
150 if (type
>= IF_IDE
&& type
< IF_COUNT
) {
151 return if_max_devs
[type
];
157 static int drive_index_to_bus_id(BlockInterfaceType type
, int index
)
159 int max_devs
= if_max_devs
[type
];
160 return max_devs
? index
/ max_devs
: 0;
163 static int drive_index_to_unit_id(BlockInterfaceType type
, int index
)
165 int max_devs
= if_max_devs
[type
];
166 return max_devs
? index
% max_devs
: index
;
169 QemuOpts
*drive_def(const char *optstr
)
171 return qemu_opts_parse(qemu_find_opts("drive"), optstr
, 0);
174 QemuOpts
*drive_add(BlockInterfaceType type
, int index
, const char *file
,
180 opts
= drive_def(optstr
);
184 if (type
!= IF_DEFAULT
) {
185 qemu_opt_set(opts
, "if", if_name
[type
]);
188 snprintf(buf
, sizeof(buf
), "%d", index
);
189 qemu_opt_set(opts
, "index", buf
);
192 qemu_opt_set(opts
, "file", file
);
196 DriveInfo
*drive_get(BlockInterfaceType type
, int bus
, int unit
)
201 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
202 dinfo
= blk_legacy_dinfo(blk
);
203 if (dinfo
&& dinfo
->type
== type
204 && dinfo
->bus
== bus
&& dinfo
->unit
== unit
) {
212 bool drive_check_orphaned(void)
218 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
219 dinfo
= blk_legacy_dinfo(blk
);
220 /* If dinfo->bdrv->dev is NULL, it has no device attached. */
221 /* Unless this is a default drive, this may be an oversight. */
222 if (!blk_bs(blk
)->dev
&& !dinfo
->is_default
&&
223 dinfo
->type
!= IF_NONE
) {
224 fprintf(stderr
, "Warning: Orphaned drive without device: "
225 "id=%s,file=%s,if=%s,bus=%d,unit=%d\n",
226 dinfo
->id
, blk_bs(blk
)->filename
, if_name
[dinfo
->type
],
227 dinfo
->bus
, dinfo
->unit
);
235 DriveInfo
*drive_get_by_index(BlockInterfaceType type
, int index
)
237 return drive_get(type
,
238 drive_index_to_bus_id(type
, index
),
239 drive_index_to_unit_id(type
, index
));
242 int drive_get_max_bus(BlockInterfaceType type
)
249 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
250 dinfo
= blk_legacy_dinfo(blk
);
251 if (dinfo
&& dinfo
->type
== type
&& dinfo
->bus
> max_bus
) {
252 max_bus
= dinfo
->bus
;
258 /* Get a block device. This should only be used for single-drive devices
259 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
261 DriveInfo
*drive_get_next(BlockInterfaceType type
)
263 static int next_block_unit
[IF_COUNT
];
265 return drive_get(type
, 0, next_block_unit
[type
]++);
268 static void bdrv_format_print(void *opaque
, const char *name
)
270 error_printf(" %s", name
);
275 BlockDriverState
*bs
;
278 static void bdrv_put_ref_bh(void *opaque
)
280 BDRVPutRefBH
*s
= opaque
;
283 qemu_bh_delete(s
->bh
);
288 * Release a BDS reference in a BH
290 * It is not safe to use bdrv_unref() from a callback function when the callers
291 * still need the BlockDriverState. In such cases we schedule a BH to release
294 static void bdrv_put_ref_bh_schedule(BlockDriverState
*bs
)
298 s
= g_new(BDRVPutRefBH
, 1);
299 s
->bh
= qemu_bh_new(bdrv_put_ref_bh
, s
);
301 qemu_bh_schedule(s
->bh
);
304 static int parse_block_error_action(const char *buf
, bool is_read
, Error
**errp
)
306 if (!strcmp(buf
, "ignore")) {
307 return BLOCKDEV_ON_ERROR_IGNORE
;
308 } else if (!is_read
&& !strcmp(buf
, "enospc")) {
309 return BLOCKDEV_ON_ERROR_ENOSPC
;
310 } else if (!strcmp(buf
, "stop")) {
311 return BLOCKDEV_ON_ERROR_STOP
;
312 } else if (!strcmp(buf
, "report")) {
313 return BLOCKDEV_ON_ERROR_REPORT
;
315 error_setg(errp
, "'%s' invalid %s error action",
316 buf
, is_read
? "read" : "write");
321 static bool check_throttle_config(ThrottleConfig
*cfg
, Error
**errp
)
323 if (throttle_conflicting(cfg
)) {
324 error_setg(errp
, "bps/iops/max total values and read/write values"
325 " cannot be used at the same time");
329 if (!throttle_is_valid(cfg
)) {
330 error_setg(errp
, "bps/iops/maxs values must be 0 or greater");
337 typedef enum { MEDIA_DISK
, MEDIA_CDROM
} DriveMediaType
;
339 /* Takes the ownership of bs_opts */
340 static BlockBackend
*blockdev_init(const char *file
, QDict
*bs_opts
,
346 int on_read_error
, on_write_error
;
348 BlockDriverState
*bs
;
357 bool has_driver_specific_opts
;
358 BlockdevDetectZeroesOptions detect_zeroes
;
359 BlockDriver
*drv
= NULL
;
361 /* Check common options by copying from bs_opts to opts, all other options
362 * stay in bs_opts for processing by bdrv_open(). */
363 id
= qdict_get_try_str(bs_opts
, "id");
364 opts
= qemu_opts_create(&qemu_common_drive_opts
, id
, 1, &error
);
366 error_propagate(errp
, error
);
370 qemu_opts_absorb_qdict(opts
, bs_opts
, &error
);
372 error_propagate(errp
, error
);
377 qdict_del(bs_opts
, "id");
380 has_driver_specific_opts
= !!qdict_size(bs_opts
);
382 /* extract parameters */
383 snapshot
= qemu_opt_get_bool(opts
, "snapshot", 0);
384 ro
= qemu_opt_get_bool(opts
, "read-only", 0);
385 copy_on_read
= qemu_opt_get_bool(opts
, "copy-on-read", false);
387 if ((buf
= qemu_opt_get(opts
, "discard")) != NULL
) {
388 if (bdrv_parse_discard_flags(buf
, &bdrv_flags
) != 0) {
389 error_setg(errp
, "invalid discard option");
394 if (qemu_opt_get_bool(opts
, "cache.writeback", true)) {
395 bdrv_flags
|= BDRV_O_CACHE_WB
;
397 if (qemu_opt_get_bool(opts
, "cache.direct", false)) {
398 bdrv_flags
|= BDRV_O_NOCACHE
;
400 if (qemu_opt_get_bool(opts
, "cache.no-flush", false)) {
401 bdrv_flags
|= BDRV_O_NO_FLUSH
;
404 #ifdef CONFIG_LINUX_AIO
405 if ((buf
= qemu_opt_get(opts
, "aio")) != NULL
) {
406 if (!strcmp(buf
, "native")) {
407 bdrv_flags
|= BDRV_O_NATIVE_AIO
;
408 } else if (!strcmp(buf
, "threads")) {
409 /* this is the default */
411 error_setg(errp
, "invalid aio option");
417 if ((buf
= qemu_opt_get(opts
, "format")) != NULL
) {
418 if (is_help_option(buf
)) {
419 error_printf("Supported formats:");
420 bdrv_iterate_format(bdrv_format_print
, NULL
);
425 drv
= bdrv_find_format(buf
);
427 error_setg(errp
, "'%s' invalid format", buf
);
432 /* disk I/O throttling */
433 memset(&cfg
, 0, sizeof(cfg
));
434 cfg
.buckets
[THROTTLE_BPS_TOTAL
].avg
=
435 qemu_opt_get_number(opts
, "throttling.bps-total", 0);
436 cfg
.buckets
[THROTTLE_BPS_READ
].avg
=
437 qemu_opt_get_number(opts
, "throttling.bps-read", 0);
438 cfg
.buckets
[THROTTLE_BPS_WRITE
].avg
=
439 qemu_opt_get_number(opts
, "throttling.bps-write", 0);
440 cfg
.buckets
[THROTTLE_OPS_TOTAL
].avg
=
441 qemu_opt_get_number(opts
, "throttling.iops-total", 0);
442 cfg
.buckets
[THROTTLE_OPS_READ
].avg
=
443 qemu_opt_get_number(opts
, "throttling.iops-read", 0);
444 cfg
.buckets
[THROTTLE_OPS_WRITE
].avg
=
445 qemu_opt_get_number(opts
, "throttling.iops-write", 0);
447 cfg
.buckets
[THROTTLE_BPS_TOTAL
].max
=
448 qemu_opt_get_number(opts
, "throttling.bps-total-max", 0);
449 cfg
.buckets
[THROTTLE_BPS_READ
].max
=
450 qemu_opt_get_number(opts
, "throttling.bps-read-max", 0);
451 cfg
.buckets
[THROTTLE_BPS_WRITE
].max
=
452 qemu_opt_get_number(opts
, "throttling.bps-write-max", 0);
453 cfg
.buckets
[THROTTLE_OPS_TOTAL
].max
=
454 qemu_opt_get_number(opts
, "throttling.iops-total-max", 0);
455 cfg
.buckets
[THROTTLE_OPS_READ
].max
=
456 qemu_opt_get_number(opts
, "throttling.iops-read-max", 0);
457 cfg
.buckets
[THROTTLE_OPS_WRITE
].max
=
458 qemu_opt_get_number(opts
, "throttling.iops-write-max", 0);
460 cfg
.op_size
= qemu_opt_get_number(opts
, "throttling.iops-size", 0);
462 if (!check_throttle_config(&cfg
, &error
)) {
463 error_propagate(errp
, error
);
467 on_write_error
= BLOCKDEV_ON_ERROR_ENOSPC
;
468 if ((buf
= qemu_opt_get(opts
, "werror")) != NULL
) {
469 on_write_error
= parse_block_error_action(buf
, 0, &error
);
471 error_propagate(errp
, error
);
476 on_read_error
= BLOCKDEV_ON_ERROR_REPORT
;
477 if ((buf
= qemu_opt_get(opts
, "rerror")) != NULL
) {
478 on_read_error
= parse_block_error_action(buf
, 1, &error
);
480 error_propagate(errp
, error
);
486 qapi_enum_parse(BlockdevDetectZeroesOptions_lookup
,
487 qemu_opt_get(opts
, "detect-zeroes"),
488 BLOCKDEV_DETECT_ZEROES_OPTIONS_MAX
,
489 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF
,
492 error_propagate(errp
, error
);
496 if (detect_zeroes
== BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP
&&
497 !(bdrv_flags
& BDRV_O_UNMAP
)) {
498 error_setg(errp
, "setting detect-zeroes to unmap is not allowed "
499 "without setting discard operation to unmap");
504 blk
= blk_new_with_bs(qemu_opts_id(opts
), errp
);
509 bs
->open_flags
= snapshot
? BDRV_O_SNAPSHOT
: 0;
511 bs
->detect_zeroes
= detect_zeroes
;
513 bdrv_set_on_error(bs
, on_read_error
, on_write_error
);
515 /* disk I/O throttling */
516 if (throttle_enabled(&cfg
)) {
517 bdrv_io_limits_enable(bs
);
518 bdrv_set_io_limits(bs
, &cfg
);
521 dinfo
= g_malloc0(sizeof(*dinfo
));
522 dinfo
->id
= g_strdup(qemu_opts_id(opts
));
523 blk_set_legacy_dinfo(blk
, dinfo
);
525 if (!file
|| !*file
) {
526 if (has_driver_specific_opts
) {
535 /* always use cache=unsafe with snapshot */
536 bdrv_flags
&= ~BDRV_O_CACHE_MASK
;
537 bdrv_flags
|= (BDRV_O_SNAPSHOT
|BDRV_O_CACHE_WB
|BDRV_O_NO_FLUSH
);
541 bdrv_flags
|= BDRV_O_COPY_ON_READ
;
544 if (runstate_check(RUN_STATE_INMIGRATE
)) {
545 bdrv_flags
|= BDRV_O_INCOMING
;
548 bdrv_flags
|= ro
? 0 : BDRV_O_RDWR
;
551 ret
= bdrv_open(&bs
, file
, NULL
, bs_opts
, bdrv_flags
, drv
, &error
);
552 assert(bs
== blk_bs(blk
));
555 error_setg(errp
, "could not open disk image %s: %s",
556 file
?: dinfo
->id
, error_get_pretty(error
));
561 if (bdrv_key_required(bs
)) {
579 static void qemu_opt_rename(QemuOpts
*opts
, const char *from
, const char *to
,
584 value
= qemu_opt_get(opts
, from
);
586 if (qemu_opt_find(opts
, to
)) {
587 error_setg(errp
, "'%s' and its alias '%s' can't be used at the "
588 "same time", to
, from
);
593 /* rename all items in opts */
594 while ((value
= qemu_opt_get(opts
, from
))) {
595 qemu_opt_set(opts
, to
, value
);
596 qemu_opt_unset(opts
, from
);
600 QemuOptsList qemu_legacy_drive_opts
= {
602 .head
= QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts
.head
),
606 .type
= QEMU_OPT_NUMBER
,
607 .help
= "bus number",
610 .type
= QEMU_OPT_NUMBER
,
611 .help
= "unit number (i.e. lun for scsi)",
614 .type
= QEMU_OPT_NUMBER
,
615 .help
= "index number",
618 .type
= QEMU_OPT_STRING
,
619 .help
= "media type (disk, cdrom)",
622 .type
= QEMU_OPT_STRING
,
623 .help
= "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
626 .type
= QEMU_OPT_NUMBER
,
627 .help
= "number of cylinders (ide disk geometry)",
630 .type
= QEMU_OPT_NUMBER
,
631 .help
= "number of heads (ide disk geometry)",
634 .type
= QEMU_OPT_NUMBER
,
635 .help
= "number of sectors (ide disk geometry)",
638 .type
= QEMU_OPT_STRING
,
639 .help
= "chs translation (auto, lba, none)",
642 .type
= QEMU_OPT_BOOL
,
643 .help
= "(deprecated, ignored)",
646 .type
= QEMU_OPT_STRING
,
647 .help
= "pci address (virtio only)",
650 .type
= QEMU_OPT_STRING
,
651 .help
= "disk serial number",
654 .type
= QEMU_OPT_STRING
,
658 /* Options that are passed on, but have special semantics with -drive */
661 .type
= QEMU_OPT_BOOL
,
662 .help
= "open drive file as read-only",
665 .type
= QEMU_OPT_STRING
,
666 .help
= "read error action",
669 .type
= QEMU_OPT_STRING
,
670 .help
= "write error action",
672 .name
= "copy-on-read",
673 .type
= QEMU_OPT_BOOL
,
674 .help
= "copy read data from backing file into image file",
677 { /* end of list */ }
681 DriveInfo
*drive_new(QemuOpts
*all_opts
, BlockInterfaceType block_default_type
)
685 DriveInfo
*dinfo
= NULL
;
687 QemuOpts
*legacy_opts
;
688 DriveMediaType media
= MEDIA_DISK
;
689 BlockInterfaceType type
;
690 int cyls
, heads
, secs
, translation
;
691 int max_devs
, bus_id
, unit_id
, index
;
693 const char *werror
, *rerror
;
694 bool read_only
= false;
697 const char *filename
;
698 Error
*local_err
= NULL
;
701 /* Change legacy command line options into QMP ones */
702 static const struct {
706 { "iops", "throttling.iops-total" },
707 { "iops_rd", "throttling.iops-read" },
708 { "iops_wr", "throttling.iops-write" },
710 { "bps", "throttling.bps-total" },
711 { "bps_rd", "throttling.bps-read" },
712 { "bps_wr", "throttling.bps-write" },
714 { "iops_max", "throttling.iops-total-max" },
715 { "iops_rd_max", "throttling.iops-read-max" },
716 { "iops_wr_max", "throttling.iops-write-max" },
718 { "bps_max", "throttling.bps-total-max" },
719 { "bps_rd_max", "throttling.bps-read-max" },
720 { "bps_wr_max", "throttling.bps-write-max" },
722 { "iops_size", "throttling.iops-size" },
724 { "readonly", "read-only" },
727 for (i
= 0; i
< ARRAY_SIZE(opt_renames
); i
++) {
728 qemu_opt_rename(all_opts
, opt_renames
[i
].from
, opt_renames
[i
].to
,
731 error_report("%s", error_get_pretty(local_err
));
732 error_free(local_err
);
737 value
= qemu_opt_get(all_opts
, "cache");
741 if (bdrv_parse_cache_flags(value
, &flags
) != 0) {
742 error_report("invalid cache option");
746 /* Specific options take precedence */
747 if (!qemu_opt_get(all_opts
, "cache.writeback")) {
748 qemu_opt_set_bool(all_opts
, "cache.writeback",
749 !!(flags
& BDRV_O_CACHE_WB
));
751 if (!qemu_opt_get(all_opts
, "cache.direct")) {
752 qemu_opt_set_bool(all_opts
, "cache.direct",
753 !!(flags
& BDRV_O_NOCACHE
));
755 if (!qemu_opt_get(all_opts
, "cache.no-flush")) {
756 qemu_opt_set_bool(all_opts
, "cache.no-flush",
757 !!(flags
& BDRV_O_NO_FLUSH
));
759 qemu_opt_unset(all_opts
, "cache");
762 /* Get a QDict for processing the options */
763 bs_opts
= qdict_new();
764 qemu_opts_to_qdict(all_opts
, bs_opts
);
766 legacy_opts
= qemu_opts_create(&qemu_legacy_drive_opts
, NULL
, 0,
768 qemu_opts_absorb_qdict(legacy_opts
, bs_opts
, &local_err
);
770 error_report("%s", error_get_pretty(local_err
));
771 error_free(local_err
);
775 /* Deprecated option boot=[on|off] */
776 if (qemu_opt_get(legacy_opts
, "boot") != NULL
) {
777 fprintf(stderr
, "qemu-kvm: boot=on|off is deprecated and will be "
778 "ignored. Future versions will reject this parameter. Please "
779 "update your scripts.\n");
783 value
= qemu_opt_get(legacy_opts
, "media");
785 if (!strcmp(value
, "disk")) {
787 } else if (!strcmp(value
, "cdrom")) {
791 error_report("'%s' invalid media", value
);
796 /* copy-on-read is disabled with a warning for read-only devices */
797 read_only
|= qemu_opt_get_bool(legacy_opts
, "read-only", false);
798 copy_on_read
= qemu_opt_get_bool(legacy_opts
, "copy-on-read", false);
800 if (read_only
&& copy_on_read
) {
801 error_report("warning: disabling copy-on-read on read-only drive");
802 copy_on_read
= false;
805 qdict_put(bs_opts
, "read-only",
806 qstring_from_str(read_only
? "on" : "off"));
807 qdict_put(bs_opts
, "copy-on-read",
808 qstring_from_str(copy_on_read
? "on" :"off"));
810 /* Controller type */
811 value
= qemu_opt_get(legacy_opts
, "if");
814 type
< IF_COUNT
&& strcmp(value
, if_name
[type
]);
817 if (type
== IF_COUNT
) {
818 error_report("unsupported bus type '%s'", value
);
822 type
= block_default_type
;
826 cyls
= qemu_opt_get_number(legacy_opts
, "cyls", 0);
827 heads
= qemu_opt_get_number(legacy_opts
, "heads", 0);
828 secs
= qemu_opt_get_number(legacy_opts
, "secs", 0);
830 if (cyls
|| heads
|| secs
) {
832 error_report("invalid physical cyls number");
836 error_report("invalid physical heads number");
840 error_report("invalid physical secs number");
845 translation
= BIOS_ATA_TRANSLATION_AUTO
;
846 value
= qemu_opt_get(legacy_opts
, "trans");
849 error_report("'%s' trans must be used with cyls, heads and secs",
853 if (!strcmp(value
, "none")) {
854 translation
= BIOS_ATA_TRANSLATION_NONE
;
855 } else if (!strcmp(value
, "lba")) {
856 translation
= BIOS_ATA_TRANSLATION_LBA
;
857 } else if (!strcmp(value
, "large")) {
858 translation
= BIOS_ATA_TRANSLATION_LARGE
;
859 } else if (!strcmp(value
, "rechs")) {
860 translation
= BIOS_ATA_TRANSLATION_RECHS
;
861 } else if (!strcmp(value
, "auto")) {
862 translation
= BIOS_ATA_TRANSLATION_AUTO
;
864 error_report("'%s' invalid translation type", value
);
869 if (media
== MEDIA_CDROM
) {
870 if (cyls
|| secs
|| heads
) {
871 error_report("CHS can't be set with media=cdrom");
876 /* Device address specified by bus/unit or index.
877 * If none was specified, try to find the first free one. */
878 bus_id
= qemu_opt_get_number(legacy_opts
, "bus", 0);
879 unit_id
= qemu_opt_get_number(legacy_opts
, "unit", -1);
880 index
= qemu_opt_get_number(legacy_opts
, "index", -1);
882 max_devs
= if_max_devs
[type
];
885 if (bus_id
!= 0 || unit_id
!= -1) {
886 error_report("index cannot be used with bus and unit");
889 bus_id
= drive_index_to_bus_id(type
, index
);
890 unit_id
= drive_index_to_unit_id(type
, index
);
895 while (drive_get(type
, bus_id
, unit_id
) != NULL
) {
897 if (max_devs
&& unit_id
>= max_devs
) {
904 if (max_devs
&& unit_id
>= max_devs
) {
905 error_report("unit %d too big (max is %d)", unit_id
, max_devs
- 1);
909 if (drive_get(type
, bus_id
, unit_id
) != NULL
) {
910 error_report("drive with bus=%d, unit=%d (index=%d) exists",
911 bus_id
, unit_id
, index
);
916 serial
= qemu_opt_get(legacy_opts
, "serial");
918 /* no id supplied -> create one */
919 if (qemu_opts_id(all_opts
) == NULL
) {
921 const char *mediastr
= "";
922 if (type
== IF_IDE
|| type
== IF_SCSI
) {
923 mediastr
= (media
== MEDIA_CDROM
) ? "-cd" : "-hd";
926 new_id
= g_strdup_printf("%s%i%s%i", if_name
[type
], bus_id
,
929 new_id
= g_strdup_printf("%s%s%i", if_name
[type
],
932 qdict_put(bs_opts
, "id", qstring_from_str(new_id
));
936 /* Add virtio block device */
937 devaddr
= qemu_opt_get(legacy_opts
, "addr");
938 if (devaddr
&& type
!= IF_VIRTIO
) {
939 error_report("addr is not supported by this bus type");
943 if (type
== IF_VIRTIO
) {
945 devopts
= qemu_opts_create(qemu_find_opts("device"), NULL
, 0,
947 if (arch_type
== QEMU_ARCH_S390X
) {
948 qemu_opt_set(devopts
, "driver", "virtio-blk-s390");
950 qemu_opt_set(devopts
, "driver", "virtio-blk-pci");
952 qemu_opt_set(devopts
, "drive", qdict_get_str(bs_opts
, "id"));
954 qemu_opt_set(devopts
, "addr", devaddr
);
958 filename
= qemu_opt_get(legacy_opts
, "file");
960 /* Check werror/rerror compatibility with if=... */
961 werror
= qemu_opt_get(legacy_opts
, "werror");
962 if (werror
!= NULL
) {
963 if (type
!= IF_IDE
&& type
!= IF_SCSI
&& type
!= IF_VIRTIO
&&
965 error_report("werror is not supported by this bus type");
968 qdict_put(bs_opts
, "werror", qstring_from_str(werror
));
971 rerror
= qemu_opt_get(legacy_opts
, "rerror");
972 if (rerror
!= NULL
) {
973 if (type
!= IF_IDE
&& type
!= IF_VIRTIO
&& type
!= IF_SCSI
&&
975 error_report("rerror is not supported by this bus type");
978 qdict_put(bs_opts
, "rerror", qstring_from_str(rerror
));
981 /* Actual block device init: Functionality shared with blockdev-add */
982 blk
= blockdev_init(filename
, bs_opts
, &local_err
);
986 error_report("%s", error_get_pretty(local_err
));
987 error_free(local_err
);
994 /* Set legacy DriveInfo fields */
995 dinfo
= blk_legacy_dinfo(blk
);
996 dinfo
->enable_auto_del
= true;
997 dinfo
->opts
= all_opts
;
1000 dinfo
->heads
= heads
;
1002 dinfo
->trans
= translation
;
1005 dinfo
->bus
= bus_id
;
1006 dinfo
->unit
= unit_id
;
1007 dinfo
->devaddr
= devaddr
;
1009 dinfo
->serial
= g_strdup(serial
);
1016 dinfo
->media_cd
= media
== MEDIA_CDROM
;
1023 qemu_opts_del(legacy_opts
);
1028 void do_commit(Monitor
*mon
, const QDict
*qdict
)
1030 const char *device
= qdict_get_str(qdict
, "device");
1031 BlockDriverState
*bs
;
1034 if (!strcmp(device
, "all")) {
1035 ret
= bdrv_commit_all();
1037 bs
= bdrv_find(device
);
1039 monitor_printf(mon
, "Device '%s' not found\n", device
);
1042 ret
= bdrv_commit(bs
);
1045 monitor_printf(mon
, "'commit' error for '%s': %s\n", device
,
1050 static void blockdev_do_action(int kind
, void *data
, Error
**errp
)
1052 TransactionAction action
;
1053 TransactionActionList list
;
1057 list
.value
= &action
;
1059 qmp_transaction(&list
, errp
);
1062 void qmp_blockdev_snapshot_sync(bool has_device
, const char *device
,
1063 bool has_node_name
, const char *node_name
,
1064 const char *snapshot_file
,
1065 bool has_snapshot_node_name
,
1066 const char *snapshot_node_name
,
1067 bool has_format
, const char *format
,
1068 bool has_mode
, NewImageMode mode
, Error
**errp
)
1070 BlockdevSnapshot snapshot
= {
1071 .has_device
= has_device
,
1072 .device
= (char *) device
,
1073 .has_node_name
= has_node_name
,
1074 .node_name
= (char *) node_name
,
1075 .snapshot_file
= (char *) snapshot_file
,
1076 .has_snapshot_node_name
= has_snapshot_node_name
,
1077 .snapshot_node_name
= (char *) snapshot_node_name
,
1078 .has_format
= has_format
,
1079 .format
= (char *) format
,
1080 .has_mode
= has_mode
,
1083 blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
,
1087 void qmp_blockdev_snapshot_internal_sync(const char *device
,
1091 BlockdevSnapshotInternal snapshot
= {
1092 .device
= (char *) device
,
1093 .name
= (char *) name
1096 blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
,
1100 SnapshotInfo
*qmp_blockdev_snapshot_delete_internal_sync(const char *device
,
1107 BlockDriverState
*bs
= bdrv_find(device
);
1108 QEMUSnapshotInfo sn
;
1109 Error
*local_err
= NULL
;
1110 SnapshotInfo
*info
= NULL
;
1114 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
1127 error_setg(errp
, "Name or id must be provided");
1131 ret
= bdrv_snapshot_find_by_id_and_name(bs
, id
, name
, &sn
, &local_err
);
1133 error_propagate(errp
, local_err
);
1138 "Snapshot with id '%s' and name '%s' does not exist on "
1140 STR_OR_NULL(id
), STR_OR_NULL(name
), device
);
1144 bdrv_snapshot_delete(bs
, id
, name
, &local_err
);
1146 error_propagate(errp
, local_err
);
1150 info
= g_new0(SnapshotInfo
, 1);
1151 info
->id
= g_strdup(sn
.id_str
);
1152 info
->name
= g_strdup(sn
.name
);
1153 info
->date_nsec
= sn
.date_nsec
;
1154 info
->date_sec
= sn
.date_sec
;
1155 info
->vm_state_size
= sn
.vm_state_size
;
1156 info
->vm_clock_nsec
= sn
.vm_clock_nsec
% 1000000000;
1157 info
->vm_clock_sec
= sn
.vm_clock_nsec
/ 1000000000;
1162 /* New and old BlockDriverState structs for group snapshots */
1164 typedef struct BlkTransactionState BlkTransactionState
;
1166 /* Only prepare() may fail. In a single transaction, only one of commit() or
1167 abort() will be called, clean() will always be called if it present. */
1168 typedef struct BdrvActionOps
{
1169 /* Size of state struct, in bytes. */
1170 size_t instance_size
;
1171 /* Prepare the work, must NOT be NULL. */
1172 void (*prepare
)(BlkTransactionState
*common
, Error
**errp
);
1173 /* Commit the changes, can be NULL. */
1174 void (*commit
)(BlkTransactionState
*common
);
1175 /* Abort the changes on fail, can be NULL. */
1176 void (*abort
)(BlkTransactionState
*common
);
1177 /* Clean up resource in the end, can be NULL. */
1178 void (*clean
)(BlkTransactionState
*common
);
1182 * This structure must be arranged as first member in child type, assuming
1183 * that compiler will also arrange it to the same address with parent instance.
1184 * Later it will be used in free().
1186 struct BlkTransactionState
{
1187 TransactionAction
*action
;
1188 const BdrvActionOps
*ops
;
1189 QSIMPLEQ_ENTRY(BlkTransactionState
) entry
;
1192 /* internal snapshot private data */
1193 typedef struct InternalSnapshotState
{
1194 BlkTransactionState common
;
1195 BlockDriverState
*bs
;
1196 QEMUSnapshotInfo sn
;
1197 } InternalSnapshotState
;
1199 static void internal_snapshot_prepare(BlkTransactionState
*common
,
1202 Error
*local_err
= NULL
;
1205 BlockDriverState
*bs
;
1206 QEMUSnapshotInfo old_sn
, *sn
;
1209 BlockdevSnapshotInternal
*internal
;
1210 InternalSnapshotState
*state
;
1213 g_assert(common
->action
->kind
==
1214 TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
);
1215 internal
= common
->action
->blockdev_snapshot_internal_sync
;
1216 state
= DO_UPCAST(InternalSnapshotState
, common
, common
);
1218 /* 1. parse input */
1219 device
= internal
->device
;
1220 name
= internal
->name
;
1222 /* 2. check for validation */
1223 bs
= bdrv_find(device
);
1225 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
1229 if (!bdrv_is_inserted(bs
)) {
1230 error_set(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
1234 if (bdrv_is_read_only(bs
)) {
1235 error_set(errp
, QERR_DEVICE_IS_READ_ONLY
, device
);
1239 if (!bdrv_can_snapshot(bs
)) {
1240 error_set(errp
, QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED
,
1241 bs
->drv
->format_name
, device
, "internal snapshot");
1245 if (!strlen(name
)) {
1246 error_setg(errp
, "Name is empty");
1250 /* check whether a snapshot with name exist */
1251 ret
= bdrv_snapshot_find_by_id_and_name(bs
, NULL
, name
, &old_sn
,
1254 error_propagate(errp
, local_err
);
1258 "Snapshot with name '%s' already exists on device '%s'",
1263 /* 3. take the snapshot */
1265 pstrcpy(sn
->name
, sizeof(sn
->name
), name
);
1266 qemu_gettimeofday(&tv
);
1267 sn
->date_sec
= tv
.tv_sec
;
1268 sn
->date_nsec
= tv
.tv_usec
* 1000;
1269 sn
->vm_clock_nsec
= qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
);
1271 ret1
= bdrv_snapshot_create(bs
, sn
);
1273 error_setg_errno(errp
, -ret1
,
1274 "Failed to create snapshot '%s' on device '%s'",
1279 /* 4. succeed, mark a snapshot is created */
1283 static void internal_snapshot_abort(BlkTransactionState
*common
)
1285 InternalSnapshotState
*state
=
1286 DO_UPCAST(InternalSnapshotState
, common
, common
);
1287 BlockDriverState
*bs
= state
->bs
;
1288 QEMUSnapshotInfo
*sn
= &state
->sn
;
1289 Error
*local_error
= NULL
;
1295 if (bdrv_snapshot_delete(bs
, sn
->id_str
, sn
->name
, &local_error
) < 0) {
1296 error_report("Failed to delete snapshot with id '%s' and name '%s' on "
1297 "device '%s' in abort: %s",
1300 bdrv_get_device_name(bs
),
1301 error_get_pretty(local_error
));
1302 error_free(local_error
);
1306 /* external snapshot private data */
1307 typedef struct ExternalSnapshotState
{
1308 BlkTransactionState common
;
1309 BlockDriverState
*old_bs
;
1310 BlockDriverState
*new_bs
;
1311 } ExternalSnapshotState
;
1313 static void external_snapshot_prepare(BlkTransactionState
*common
,
1318 QDict
*options
= NULL
;
1319 Error
*local_err
= NULL
;
1320 bool has_device
= false;
1322 bool has_node_name
= false;
1323 const char *node_name
;
1324 bool has_snapshot_node_name
= false;
1325 const char *snapshot_node_name
;
1326 const char *new_image_file
;
1327 const char *format
= "qcow2";
1328 enum NewImageMode mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
1329 ExternalSnapshotState
*state
=
1330 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1331 TransactionAction
*action
= common
->action
;
1333 /* get parameters */
1334 g_assert(action
->kind
== TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
);
1336 has_device
= action
->blockdev_snapshot_sync
->has_device
;
1337 device
= action
->blockdev_snapshot_sync
->device
;
1338 has_node_name
= action
->blockdev_snapshot_sync
->has_node_name
;
1339 node_name
= action
->blockdev_snapshot_sync
->node_name
;
1340 has_snapshot_node_name
=
1341 action
->blockdev_snapshot_sync
->has_snapshot_node_name
;
1342 snapshot_node_name
= action
->blockdev_snapshot_sync
->snapshot_node_name
;
1344 new_image_file
= action
->blockdev_snapshot_sync
->snapshot_file
;
1345 if (action
->blockdev_snapshot_sync
->has_format
) {
1346 format
= action
->blockdev_snapshot_sync
->format
;
1348 if (action
->blockdev_snapshot_sync
->has_mode
) {
1349 mode
= action
->blockdev_snapshot_sync
->mode
;
1352 /* start processing */
1353 drv
= bdrv_find_format(format
);
1355 error_set(errp
, QERR_INVALID_BLOCK_FORMAT
, format
);
1359 state
->old_bs
= bdrv_lookup_bs(has_device
? device
: NULL
,
1360 has_node_name
? node_name
: NULL
,
1363 error_propagate(errp
, local_err
);
1367 if (has_node_name
&& !has_snapshot_node_name
) {
1368 error_setg(errp
, "New snapshot node name missing");
1372 if (has_snapshot_node_name
&& bdrv_find_node(snapshot_node_name
)) {
1373 error_setg(errp
, "New snapshot node name already existing");
1377 if (!bdrv_is_inserted(state
->old_bs
)) {
1378 error_set(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
1382 if (bdrv_op_is_blocked(state
->old_bs
,
1383 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT
, errp
)) {
1387 if (!bdrv_is_read_only(state
->old_bs
)) {
1388 if (bdrv_flush(state
->old_bs
)) {
1389 error_set(errp
, QERR_IO_ERROR
);
1394 if (!bdrv_is_first_non_filter(state
->old_bs
)) {
1395 error_set(errp
, QERR_FEATURE_DISABLED
, "snapshot");
1399 flags
= state
->old_bs
->open_flags
;
1401 /* create new image w/backing file */
1402 if (mode
!= NEW_IMAGE_MODE_EXISTING
) {
1403 bdrv_img_create(new_image_file
, format
,
1404 state
->old_bs
->filename
,
1405 state
->old_bs
->drv
->format_name
,
1406 NULL
, -1, flags
, &local_err
, false);
1408 error_propagate(errp
, local_err
);
1413 if (has_snapshot_node_name
) {
1414 options
= qdict_new();
1415 qdict_put(options
, "node-name",
1416 qstring_from_str(snapshot_node_name
));
1419 /* TODO Inherit bs->options or only take explicit options with an
1420 * extended QMP command? */
1421 assert(state
->new_bs
== NULL
);
1422 ret
= bdrv_open(&state
->new_bs
, new_image_file
, NULL
, options
,
1423 flags
| BDRV_O_NO_BACKING
, drv
, &local_err
);
1424 /* We will manually add the backing_hd field to the bs later */
1426 error_propagate(errp
, local_err
);
1430 static void external_snapshot_commit(BlkTransactionState
*common
)
1432 ExternalSnapshotState
*state
=
1433 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1435 /* This removes our old bs and adds the new bs */
1436 bdrv_append(state
->new_bs
, state
->old_bs
);
1437 /* We don't need (or want) to use the transactional
1438 * bdrv_reopen_multiple() across all the entries at once, because we
1439 * don't want to abort all of them if one of them fails the reopen */
1440 bdrv_reopen(state
->new_bs
, state
->new_bs
->open_flags
& ~BDRV_O_RDWR
,
1444 static void external_snapshot_abort(BlkTransactionState
*common
)
1446 ExternalSnapshotState
*state
=
1447 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1448 if (state
->new_bs
) {
1449 bdrv_unref(state
->new_bs
);
1453 typedef struct DriveBackupState
{
1454 BlkTransactionState common
;
1455 BlockDriverState
*bs
;
1459 static void drive_backup_prepare(BlkTransactionState
*common
, Error
**errp
)
1461 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1462 DriveBackup
*backup
;
1463 Error
*local_err
= NULL
;
1465 assert(common
->action
->kind
== TRANSACTION_ACTION_KIND_DRIVE_BACKUP
);
1466 backup
= common
->action
->drive_backup
;
1468 qmp_drive_backup(backup
->device
, backup
->target
,
1469 backup
->has_format
, backup
->format
,
1471 backup
->has_mode
, backup
->mode
,
1472 backup
->has_speed
, backup
->speed
,
1473 backup
->has_on_source_error
, backup
->on_source_error
,
1474 backup
->has_on_target_error
, backup
->on_target_error
,
1477 error_propagate(errp
, local_err
);
1483 state
->bs
= bdrv_find(backup
->device
);
1484 state
->job
= state
->bs
->job
;
1487 static void drive_backup_abort(BlkTransactionState
*common
)
1489 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1490 BlockDriverState
*bs
= state
->bs
;
1492 /* Only cancel if it's the job we started */
1493 if (bs
&& bs
->job
&& bs
->job
== state
->job
) {
1494 block_job_cancel_sync(bs
->job
);
1498 static void abort_prepare(BlkTransactionState
*common
, Error
**errp
)
1500 error_setg(errp
, "Transaction aborted using Abort action");
1503 static void abort_commit(BlkTransactionState
*common
)
1505 g_assert_not_reached(); /* this action never succeeds */
1508 static const BdrvActionOps actions
[] = {
1509 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
] = {
1510 .instance_size
= sizeof(ExternalSnapshotState
),
1511 .prepare
= external_snapshot_prepare
,
1512 .commit
= external_snapshot_commit
,
1513 .abort
= external_snapshot_abort
,
1515 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP
] = {
1516 .instance_size
= sizeof(DriveBackupState
),
1517 .prepare
= drive_backup_prepare
,
1518 .abort
= drive_backup_abort
,
1520 [TRANSACTION_ACTION_KIND_ABORT
] = {
1521 .instance_size
= sizeof(BlkTransactionState
),
1522 .prepare
= abort_prepare
,
1523 .commit
= abort_commit
,
1525 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
] = {
1526 .instance_size
= sizeof(InternalSnapshotState
),
1527 .prepare
= internal_snapshot_prepare
,
1528 .abort
= internal_snapshot_abort
,
1533 * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
1534 * then we do not pivot any of the devices in the group, and abandon the
1537 void qmp_transaction(TransactionActionList
*dev_list
, Error
**errp
)
1539 TransactionActionList
*dev_entry
= dev_list
;
1540 BlkTransactionState
*state
, *next
;
1541 Error
*local_err
= NULL
;
1543 QSIMPLEQ_HEAD(snap_bdrv_states
, BlkTransactionState
) snap_bdrv_states
;
1544 QSIMPLEQ_INIT(&snap_bdrv_states
);
1546 /* drain all i/o before any snapshots */
1549 /* We don't do anything in this loop that commits us to the snapshot */
1550 while (NULL
!= dev_entry
) {
1551 TransactionAction
*dev_info
= NULL
;
1552 const BdrvActionOps
*ops
;
1554 dev_info
= dev_entry
->value
;
1555 dev_entry
= dev_entry
->next
;
1557 assert(dev_info
->kind
< ARRAY_SIZE(actions
));
1559 ops
= &actions
[dev_info
->kind
];
1560 assert(ops
->instance_size
> 0);
1562 state
= g_malloc0(ops
->instance_size
);
1564 state
->action
= dev_info
;
1565 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states
, state
, entry
);
1567 state
->ops
->prepare(state
, &local_err
);
1569 error_propagate(errp
, local_err
);
1570 goto delete_and_fail
;
1574 QSIMPLEQ_FOREACH(state
, &snap_bdrv_states
, entry
) {
1575 if (state
->ops
->commit
) {
1576 state
->ops
->commit(state
);
1585 * failure, and it is all-or-none; abandon each new bs, and keep using
1586 * the original bs for all images
1588 QSIMPLEQ_FOREACH(state
, &snap_bdrv_states
, entry
) {
1589 if (state
->ops
->abort
) {
1590 state
->ops
->abort(state
);
1594 QSIMPLEQ_FOREACH_SAFE(state
, &snap_bdrv_states
, entry
, next
) {
1595 if (state
->ops
->clean
) {
1596 state
->ops
->clean(state
);
1603 static void eject_device(BlockDriverState
*bs
, int force
, Error
**errp
)
1605 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_EJECT
, errp
)) {
1608 if (!bdrv_dev_has_removable_media(bs
)) {
1609 error_setg(errp
, "Device '%s' is not removable",
1610 bdrv_get_device_name(bs
));
1614 if (bdrv_dev_is_medium_locked(bs
) && !bdrv_dev_is_tray_open(bs
)) {
1615 bdrv_dev_eject_request(bs
, force
);
1617 error_setg(errp
, "Device '%s' is locked",
1618 bdrv_get_device_name(bs
));
1626 void qmp_eject(const char *device
, bool has_force
, bool force
, Error
**errp
)
1628 BlockDriverState
*bs
;
1630 bs
= bdrv_find(device
);
1632 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
1636 eject_device(bs
, force
, errp
);
1639 void qmp_block_passwd(bool has_device
, const char *device
,
1640 bool has_node_name
, const char *node_name
,
1641 const char *password
, Error
**errp
)
1643 Error
*local_err
= NULL
;
1644 BlockDriverState
*bs
;
1647 bs
= bdrv_lookup_bs(has_device
? device
: NULL
,
1648 has_node_name
? node_name
: NULL
,
1651 error_propagate(errp
, local_err
);
1655 err
= bdrv_set_key(bs
, password
);
1656 if (err
== -EINVAL
) {
1657 error_set(errp
, QERR_DEVICE_NOT_ENCRYPTED
, bdrv_get_device_name(bs
));
1659 } else if (err
< 0) {
1660 error_set(errp
, QERR_INVALID_PASSWORD
);
1665 static void qmp_bdrv_open_encrypted(BlockDriverState
*bs
, const char *filename
,
1666 int bdrv_flags
, BlockDriver
*drv
,
1667 const char *password
, Error
**errp
)
1669 Error
*local_err
= NULL
;
1672 ret
= bdrv_open(&bs
, filename
, NULL
, NULL
, bdrv_flags
, drv
, &local_err
);
1674 error_propagate(errp
, local_err
);
1678 if (bdrv_key_required(bs
)) {
1680 if (bdrv_set_key(bs
, password
) < 0) {
1681 error_set(errp
, QERR_INVALID_PASSWORD
);
1684 error_set(errp
, QERR_DEVICE_ENCRYPTED
, bdrv_get_device_name(bs
),
1685 bdrv_get_encrypted_filename(bs
));
1687 } else if (password
) {
1688 error_set(errp
, QERR_DEVICE_NOT_ENCRYPTED
, bdrv_get_device_name(bs
));
1692 void qmp_change_blockdev(const char *device
, const char *filename
,
1693 const char *format
, Error
**errp
)
1695 BlockDriverState
*bs
;
1696 BlockDriver
*drv
= NULL
;
1700 bs
= bdrv_find(device
);
1702 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
1707 drv
= bdrv_find_whitelisted_format(format
, bs
->read_only
);
1709 error_set(errp
, QERR_INVALID_BLOCK_FORMAT
, format
);
1714 eject_device(bs
, 0, &err
);
1716 error_propagate(errp
, err
);
1720 bdrv_flags
= bdrv_is_read_only(bs
) ? 0 : BDRV_O_RDWR
;
1721 bdrv_flags
|= bdrv_is_snapshot(bs
) ? BDRV_O_SNAPSHOT
: 0;
1723 qmp_bdrv_open_encrypted(bs
, filename
, bdrv_flags
, drv
, NULL
, errp
);
1726 /* throttling disk I/O limits */
1727 void qmp_block_set_io_throttle(const char *device
, int64_t bps
, int64_t bps_rd
,
1734 bool has_bps_rd_max
,
1736 bool has_bps_wr_max
,
1740 bool has_iops_rd_max
,
1741 int64_t iops_rd_max
,
1742 bool has_iops_wr_max
,
1743 int64_t iops_wr_max
,
1745 int64_t iops_size
, Error
**errp
)
1748 BlockDriverState
*bs
;
1749 AioContext
*aio_context
;
1751 bs
= bdrv_find(device
);
1753 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
1757 memset(&cfg
, 0, sizeof(cfg
));
1758 cfg
.buckets
[THROTTLE_BPS_TOTAL
].avg
= bps
;
1759 cfg
.buckets
[THROTTLE_BPS_READ
].avg
= bps_rd
;
1760 cfg
.buckets
[THROTTLE_BPS_WRITE
].avg
= bps_wr
;
1762 cfg
.buckets
[THROTTLE_OPS_TOTAL
].avg
= iops
;
1763 cfg
.buckets
[THROTTLE_OPS_READ
].avg
= iops_rd
;
1764 cfg
.buckets
[THROTTLE_OPS_WRITE
].avg
= iops_wr
;
1767 cfg
.buckets
[THROTTLE_BPS_TOTAL
].max
= bps_max
;
1769 if (has_bps_rd_max
) {
1770 cfg
.buckets
[THROTTLE_BPS_READ
].max
= bps_rd_max
;
1772 if (has_bps_wr_max
) {
1773 cfg
.buckets
[THROTTLE_BPS_WRITE
].max
= bps_wr_max
;
1776 cfg
.buckets
[THROTTLE_OPS_TOTAL
].max
= iops_max
;
1778 if (has_iops_rd_max
) {
1779 cfg
.buckets
[THROTTLE_OPS_READ
].max
= iops_rd_max
;
1781 if (has_iops_wr_max
) {
1782 cfg
.buckets
[THROTTLE_OPS_WRITE
].max
= iops_wr_max
;
1785 if (has_iops_size
) {
1786 cfg
.op_size
= iops_size
;
1789 if (!check_throttle_config(&cfg
, errp
)) {
1793 aio_context
= bdrv_get_aio_context(bs
);
1794 aio_context_acquire(aio_context
);
1796 if (!bs
->io_limits_enabled
&& throttle_enabled(&cfg
)) {
1797 bdrv_io_limits_enable(bs
);
1798 } else if (bs
->io_limits_enabled
&& !throttle_enabled(&cfg
)) {
1799 bdrv_io_limits_disable(bs
);
1802 if (bs
->io_limits_enabled
) {
1803 bdrv_set_io_limits(bs
, &cfg
);
1806 aio_context_release(aio_context
);
1809 int do_drive_del(Monitor
*mon
, const QDict
*qdict
, QObject
**ret_data
)
1811 const char *id
= qdict_get_str(qdict
, "id");
1813 BlockDriverState
*bs
;
1815 AioContext
*aio_context
;
1816 Error
*local_err
= NULL
;
1818 blk
= blk_by_name(id
);
1820 error_report("Device '%s' not found", id
);
1825 dinfo
= blk_legacy_dinfo(blk
);
1826 if (dinfo
&& !dinfo
->enable_auto_del
) {
1827 error_report("Deleting device added with blockdev-add"
1828 " is not supported");
1832 aio_context
= bdrv_get_aio_context(bs
);
1833 aio_context_acquire(aio_context
);
1835 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_DRIVE_DEL
, &local_err
)) {
1836 error_report("%s", error_get_pretty(local_err
));
1837 error_free(local_err
);
1838 aio_context_release(aio_context
);
1842 /* quiesce block driver; prevent further io */
1847 /* if we have a device attached to this BlockDriverState
1848 * then we need to make the drive anonymous until the device
1849 * can be removed. If this is a drive with no device backing
1850 * then we can just get rid of the block driver state right here.
1852 if (bdrv_get_attached_dev(bs
)) {
1853 blk_hide_on_behalf_of_do_drive_del(blk
);
1854 /* Further I/O must not pause the guest */
1855 bdrv_set_on_error(bs
, BLOCKDEV_ON_ERROR_REPORT
,
1856 BLOCKDEV_ON_ERROR_REPORT
);
1861 aio_context_release(aio_context
);
1865 void qmp_block_resize(bool has_device
, const char *device
,
1866 bool has_node_name
, const char *node_name
,
1867 int64_t size
, Error
**errp
)
1869 Error
*local_err
= NULL
;
1870 BlockDriverState
*bs
;
1871 AioContext
*aio_context
;
1874 bs
= bdrv_lookup_bs(has_device
? device
: NULL
,
1875 has_node_name
? node_name
: NULL
,
1878 error_propagate(errp
, local_err
);
1882 aio_context
= bdrv_get_aio_context(bs
);
1883 aio_context_acquire(aio_context
);
1885 if (!bdrv_is_first_non_filter(bs
)) {
1886 error_set(errp
, QERR_FEATURE_DISABLED
, "resize");
1891 error_set(errp
, QERR_INVALID_PARAMETER_VALUE
, "size", "a >0 size");
1895 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_RESIZE
, NULL
)) {
1896 error_set(errp
, QERR_DEVICE_IN_USE
, device
);
1900 /* complete all in-flight operations before resizing the device */
1903 ret
= bdrv_truncate(bs
, size
);
1908 error_set(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
1911 error_set(errp
, QERR_UNSUPPORTED
);
1914 error_set(errp
, QERR_DEVICE_IS_READ_ONLY
, device
);
1917 error_set(errp
, QERR_DEVICE_IN_USE
, device
);
1920 error_setg_errno(errp
, -ret
, "Could not resize");
1925 aio_context_release(aio_context
);
1928 static void block_job_cb(void *opaque
, int ret
)
1930 BlockDriverState
*bs
= opaque
;
1931 const char *msg
= NULL
;
1933 trace_block_job_cb(bs
, bs
->job
, ret
);
1938 msg
= strerror(-ret
);
1941 if (block_job_is_cancelled(bs
->job
)) {
1942 block_job_event_cancelled(bs
->job
);
1944 block_job_event_completed(bs
->job
, msg
);
1947 bdrv_put_ref_bh_schedule(bs
);
1950 void qmp_block_stream(const char *device
,
1951 bool has_base
, const char *base
,
1952 bool has_backing_file
, const char *backing_file
,
1953 bool has_speed
, int64_t speed
,
1954 bool has_on_error
, BlockdevOnError on_error
,
1957 BlockDriverState
*bs
;
1958 BlockDriverState
*base_bs
= NULL
;
1959 Error
*local_err
= NULL
;
1960 const char *base_name
= NULL
;
1962 if (!has_on_error
) {
1963 on_error
= BLOCKDEV_ON_ERROR_REPORT
;
1966 bs
= bdrv_find(device
);
1968 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
1972 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_STREAM
, errp
)) {
1977 base_bs
= bdrv_find_backing_image(bs
, base
);
1978 if (base_bs
== NULL
) {
1979 error_set(errp
, QERR_BASE_NOT_FOUND
, base
);
1985 /* if we are streaming the entire chain, the result will have no backing
1986 * file, and specifying one is therefore an error */
1987 if (base_bs
== NULL
&& has_backing_file
) {
1988 error_setg(errp
, "backing file specified, but streaming the "
1993 /* backing_file string overrides base bs filename */
1994 base_name
= has_backing_file
? backing_file
: base_name
;
1996 stream_start(bs
, base_bs
, base_name
, has_speed
? speed
: 0,
1997 on_error
, block_job_cb
, bs
, &local_err
);
1999 error_propagate(errp
, local_err
);
2003 trace_qmp_block_stream(bs
, bs
->job
);
2006 void qmp_block_commit(const char *device
,
2007 bool has_base
, const char *base
,
2008 bool has_top
, const char *top
,
2009 bool has_backing_file
, const char *backing_file
,
2010 bool has_speed
, int64_t speed
,
2013 BlockDriverState
*bs
;
2014 BlockDriverState
*base_bs
, *top_bs
;
2015 Error
*local_err
= NULL
;
2016 /* This will be part of the QMP command, if/when the
2017 * BlockdevOnError change for blkmirror makes it in
2019 BlockdevOnError on_error
= BLOCKDEV_ON_ERROR_REPORT
;
2025 /* drain all i/o before commits */
2029 * libvirt relies on the DeviceNotFound error class in order to probe for
2030 * live commit feature versions; for this to work, we must make sure to
2031 * perform the device lookup before any generic errors that may occur in a
2032 * scenario in which all optional arguments are omitted. */
2033 bs
= bdrv_find(device
);
2035 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
2039 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_COMMIT
, errp
)) {
2043 /* default top_bs is the active layer */
2046 if (has_top
&& top
) {
2047 if (strcmp(bs
->filename
, top
) != 0) {
2048 top_bs
= bdrv_find_backing_image(bs
, top
);
2052 if (top_bs
== NULL
) {
2053 error_setg(errp
, "Top image file %s not found", top
? top
: "NULL");
2057 if (has_base
&& base
) {
2058 base_bs
= bdrv_find_backing_image(top_bs
, base
);
2060 base_bs
= bdrv_find_base(top_bs
);
2063 if (base_bs
== NULL
) {
2064 error_set(errp
, QERR_BASE_NOT_FOUND
, base
? base
: "NULL");
2068 /* Do not allow attempts to commit an image into itself */
2069 if (top_bs
== base_bs
) {
2070 error_setg(errp
, "cannot commit an image into itself");
2075 if (has_backing_file
) {
2076 error_setg(errp
, "'backing-file' specified,"
2077 " but 'top' is the active layer");
2080 commit_active_start(bs
, base_bs
, speed
, on_error
, block_job_cb
,
2083 commit_start(bs
, base_bs
, top_bs
, speed
, on_error
, block_job_cb
, bs
,
2084 has_backing_file
? backing_file
: NULL
, &local_err
);
2086 if (local_err
!= NULL
) {
2087 error_propagate(errp
, local_err
);
2092 void qmp_drive_backup(const char *device
, const char *target
,
2093 bool has_format
, const char *format
,
2094 enum MirrorSyncMode sync
,
2095 bool has_mode
, enum NewImageMode mode
,
2096 bool has_speed
, int64_t speed
,
2097 bool has_on_source_error
, BlockdevOnError on_source_error
,
2098 bool has_on_target_error
, BlockdevOnError on_target_error
,
2101 BlockDriverState
*bs
;
2102 BlockDriverState
*target_bs
;
2103 BlockDriverState
*source
= NULL
;
2104 BlockDriver
*drv
= NULL
;
2105 Error
*local_err
= NULL
;
2113 if (!has_on_source_error
) {
2114 on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
2116 if (!has_on_target_error
) {
2117 on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
2120 mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
2123 bs
= bdrv_find(device
);
2125 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
2129 if (!bdrv_is_inserted(bs
)) {
2130 error_set(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
2135 format
= mode
== NEW_IMAGE_MODE_EXISTING
? NULL
: bs
->drv
->format_name
;
2138 drv
= bdrv_find_format(format
);
2140 error_set(errp
, QERR_INVALID_BLOCK_FORMAT
, format
);
2145 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_BACKUP_SOURCE
, errp
)) {
2149 flags
= bs
->open_flags
| BDRV_O_RDWR
;
2151 /* See if we have a backing HD we can use to create our new image
2153 if (sync
== MIRROR_SYNC_MODE_TOP
) {
2154 source
= bs
->backing_hd
;
2156 sync
= MIRROR_SYNC_MODE_FULL
;
2159 if (sync
== MIRROR_SYNC_MODE_NONE
) {
2163 size
= bdrv_getlength(bs
);
2165 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
2169 if (mode
!= NEW_IMAGE_MODE_EXISTING
) {
2170 assert(format
&& drv
);
2172 bdrv_img_create(target
, format
, source
->filename
,
2173 source
->drv
->format_name
, NULL
,
2174 size
, flags
, &local_err
, false);
2176 bdrv_img_create(target
, format
, NULL
, NULL
, NULL
,
2177 size
, flags
, &local_err
, false);
2182 error_propagate(errp
, local_err
);
2187 ret
= bdrv_open(&target_bs
, target
, NULL
, NULL
, flags
, drv
, &local_err
);
2189 error_propagate(errp
, local_err
);
2193 backup_start(bs
, target_bs
, speed
, sync
, on_source_error
, on_target_error
,
2194 block_job_cb
, bs
, &local_err
);
2195 if (local_err
!= NULL
) {
2196 bdrv_unref(target_bs
);
2197 error_propagate(errp
, local_err
);
2202 BlockDeviceInfoList
*qmp_query_named_block_nodes(Error
**errp
)
2204 return bdrv_named_nodes_list();
2207 #define DEFAULT_MIRROR_BUF_SIZE (10 << 20)
2209 void qmp_drive_mirror(const char *device
, const char *target
,
2210 bool has_format
, const char *format
,
2211 bool has_node_name
, const char *node_name
,
2212 bool has_replaces
, const char *replaces
,
2213 enum MirrorSyncMode sync
,
2214 bool has_mode
, enum NewImageMode mode
,
2215 bool has_speed
, int64_t speed
,
2216 bool has_granularity
, uint32_t granularity
,
2217 bool has_buf_size
, int64_t buf_size
,
2218 bool has_on_source_error
, BlockdevOnError on_source_error
,
2219 bool has_on_target_error
, BlockdevOnError on_target_error
,
2222 BlockDriverState
*bs
;
2223 BlockDriverState
*source
, *target_bs
;
2224 BlockDriver
*drv
= NULL
;
2225 Error
*local_err
= NULL
;
2226 QDict
*options
= NULL
;
2234 if (!has_on_source_error
) {
2235 on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
2237 if (!has_on_target_error
) {
2238 on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
2241 mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
2243 if (!has_granularity
) {
2246 if (!has_buf_size
) {
2247 buf_size
= DEFAULT_MIRROR_BUF_SIZE
;
2250 if (granularity
!= 0 && (granularity
< 512 || granularity
> 1048576 * 64)) {
2251 error_set(errp
, QERR_INVALID_PARAMETER_VALUE
, "granularity",
2252 "a value in range [512B, 64MB]");
2255 if (granularity
& (granularity
- 1)) {
2256 error_set(errp
, QERR_INVALID_PARAMETER_VALUE
, "granularity", "power of 2");
2260 bs
= bdrv_find(device
);
2262 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
2266 if (!bdrv_is_inserted(bs
)) {
2267 error_set(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
2272 format
= mode
== NEW_IMAGE_MODE_EXISTING
? NULL
: bs
->drv
->format_name
;
2275 drv
= bdrv_find_format(format
);
2277 error_set(errp
, QERR_INVALID_BLOCK_FORMAT
, format
);
2282 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_MIRROR
, errp
)) {
2286 flags
= bs
->open_flags
| BDRV_O_RDWR
;
2287 source
= bs
->backing_hd
;
2288 if (!source
&& sync
== MIRROR_SYNC_MODE_TOP
) {
2289 sync
= MIRROR_SYNC_MODE_FULL
;
2291 if (sync
== MIRROR_SYNC_MODE_NONE
) {
2295 size
= bdrv_getlength(bs
);
2297 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
2302 BlockDriverState
*to_replace_bs
;
2304 if (!has_node_name
) {
2305 error_setg(errp
, "a node-name must be provided when replacing a"
2306 " named node of the graph");
2310 to_replace_bs
= check_to_replace_node(replaces
, &local_err
);
2312 if (!to_replace_bs
) {
2313 error_propagate(errp
, local_err
);
2317 if (size
!= bdrv_getlength(to_replace_bs
)) {
2318 error_setg(errp
, "cannot replace image with a mirror image of "
2324 if ((sync
== MIRROR_SYNC_MODE_FULL
|| !source
)
2325 && mode
!= NEW_IMAGE_MODE_EXISTING
)
2327 /* create new image w/o backing file */
2328 assert(format
&& drv
);
2329 bdrv_img_create(target
, format
,
2330 NULL
, NULL
, NULL
, size
, flags
, &local_err
, false);
2333 case NEW_IMAGE_MODE_EXISTING
:
2335 case NEW_IMAGE_MODE_ABSOLUTE_PATHS
:
2336 /* create new image with backing file */
2337 bdrv_img_create(target
, format
,
2339 source
->drv
->format_name
,
2340 NULL
, size
, flags
, &local_err
, false);
2348 error_propagate(errp
, local_err
);
2352 if (has_node_name
) {
2353 options
= qdict_new();
2354 qdict_put(options
, "node-name", qstring_from_str(node_name
));
2357 /* Mirroring takes care of copy-on-write using the source's backing
2361 ret
= bdrv_open(&target_bs
, target
, NULL
, options
,
2362 flags
| BDRV_O_NO_BACKING
, drv
, &local_err
);
2364 error_propagate(errp
, local_err
);
2368 /* pass the node name to replace to mirror start since it's loose coupling
2369 * and will allow to check whether the node still exist at mirror completion
2371 mirror_start(bs
, target_bs
,
2372 has_replaces
? replaces
: NULL
,
2373 speed
, granularity
, buf_size
, sync
,
2374 on_source_error
, on_target_error
,
2375 block_job_cb
, bs
, &local_err
);
2376 if (local_err
!= NULL
) {
2377 bdrv_unref(target_bs
);
2378 error_propagate(errp
, local_err
);
2383 static BlockJob
*find_block_job(const char *device
)
2385 BlockDriverState
*bs
;
2387 bs
= bdrv_find(device
);
2388 if (!bs
|| !bs
->job
) {
2394 void qmp_block_job_set_speed(const char *device
, int64_t speed
, Error
**errp
)
2396 BlockJob
*job
= find_block_job(device
);
2399 error_set(errp
, QERR_BLOCK_JOB_NOT_ACTIVE
, device
);
2403 block_job_set_speed(job
, speed
, errp
);
2406 void qmp_block_job_cancel(const char *device
,
2407 bool has_force
, bool force
, Error
**errp
)
2409 BlockJob
*job
= find_block_job(device
);
2416 error_set(errp
, QERR_BLOCK_JOB_NOT_ACTIVE
, device
);
2419 if (job
->paused
&& !force
) {
2420 error_setg(errp
, "The block job for device '%s' is currently paused",
2425 trace_qmp_block_job_cancel(job
);
2426 block_job_cancel(job
);
2429 void qmp_block_job_pause(const char *device
, Error
**errp
)
2431 BlockJob
*job
= find_block_job(device
);
2434 error_set(errp
, QERR_BLOCK_JOB_NOT_ACTIVE
, device
);
2438 trace_qmp_block_job_pause(job
);
2439 block_job_pause(job
);
2442 void qmp_block_job_resume(const char *device
, Error
**errp
)
2444 BlockJob
*job
= find_block_job(device
);
2447 error_set(errp
, QERR_BLOCK_JOB_NOT_ACTIVE
, device
);
2451 trace_qmp_block_job_resume(job
);
2452 block_job_resume(job
);
2455 void qmp_block_job_complete(const char *device
, Error
**errp
)
2457 BlockJob
*job
= find_block_job(device
);
2460 error_set(errp
, QERR_BLOCK_JOB_NOT_ACTIVE
, device
);
2464 trace_qmp_block_job_complete(job
);
2465 block_job_complete(job
, errp
);
2468 void qmp_change_backing_file(const char *device
,
2469 const char *image_node_name
,
2470 const char *backing_file
,
2473 BlockDriverState
*bs
= NULL
;
2474 BlockDriverState
*image_bs
= NULL
;
2475 Error
*local_err
= NULL
;
2480 /* find the top layer BDS of the chain */
2481 bs
= bdrv_find(device
);
2483 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
2487 image_bs
= bdrv_lookup_bs(NULL
, image_node_name
, &local_err
);
2489 error_propagate(errp
, local_err
);
2494 error_setg(errp
, "image file not found");
2498 if (bdrv_find_base(image_bs
) == image_bs
) {
2499 error_setg(errp
, "not allowing backing file change on an image "
2500 "without a backing file");
2504 /* even though we are not necessarily operating on bs, we need it to
2505 * determine if block ops are currently prohibited on the chain */
2506 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_CHANGE
, errp
)) {
2510 /* final sanity check */
2511 if (!bdrv_chain_contains(bs
, image_bs
)) {
2512 error_setg(errp
, "'%s' and image file are not in the same chain",
2517 /* if not r/w, reopen to make r/w */
2518 open_flags
= image_bs
->open_flags
;
2519 ro
= bdrv_is_read_only(image_bs
);
2522 bdrv_reopen(image_bs
, open_flags
| BDRV_O_RDWR
, &local_err
);
2524 error_propagate(errp
, local_err
);
2529 ret
= bdrv_change_backing_file(image_bs
, backing_file
,
2530 image_bs
->drv
? image_bs
->drv
->format_name
: "");
2533 error_setg_errno(errp
, -ret
, "Could not change backing file to '%s'",
2535 /* don't exit here, so we can try to restore open flags if
2540 bdrv_reopen(image_bs
, open_flags
, &local_err
);
2542 error_propagate(errp
, local_err
); /* will preserve prior errp */
2547 void qmp_blockdev_add(BlockdevOptions
*options
, Error
**errp
)
2549 QmpOutputVisitor
*ov
= qmp_output_visitor_new();
2553 Error
*local_err
= NULL
;
2555 /* Require an ID in the top level */
2556 if (!options
->has_id
) {
2557 error_setg(errp
, "Block device needs an ID");
2561 /* TODO Sort it out in raw-posix and drive_new(): Reject aio=native with
2562 * cache.direct=false instead of silently switching to aio=threads, except
2563 * when called from drive_new().
2565 * For now, simply forbidding the combination for all drivers will do. */
2566 if (options
->has_aio
&& options
->aio
== BLOCKDEV_AIO_OPTIONS_NATIVE
) {
2567 bool direct
= options
->has_cache
&&
2568 options
->cache
->has_direct
&&
2569 options
->cache
->direct
;
2571 error_setg(errp
, "aio=native requires cache.direct=true");
2576 visit_type_BlockdevOptions(qmp_output_get_visitor(ov
),
2577 &options
, NULL
, &local_err
);
2579 error_propagate(errp
, local_err
);
2583 obj
= qmp_output_get_qobject(ov
);
2584 qdict
= qobject_to_qdict(obj
);
2586 qdict_flatten(qdict
);
2588 blk
= blockdev_init(NULL
, qdict
, &local_err
);
2590 error_propagate(errp
, local_err
);
2594 if (bdrv_key_required(blk_bs(blk
))) {
2596 error_setg(errp
, "blockdev-add doesn't support encrypted devices");
2601 qmp_output_visitor_cleanup(ov
);
2604 BlockJobInfoList
*qmp_query_block_jobs(Error
**errp
)
2606 BlockJobInfoList
*head
= NULL
, **p_next
= &head
;
2607 BlockDriverState
*bs
;
2609 for (bs
= bdrv_next(NULL
); bs
; bs
= bdrv_next(bs
)) {
2611 BlockJobInfoList
*elem
= g_new0(BlockJobInfoList
, 1);
2612 elem
->value
= block_job_query(bs
->job
);
2614 p_next
= &elem
->next
;
2621 QemuOptsList qemu_common_drive_opts
= {
2623 .head
= QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts
.head
),
2627 .type
= QEMU_OPT_BOOL
,
2628 .help
= "enable/disable snapshot mode",
2631 .type
= QEMU_OPT_STRING
,
2632 .help
= "discard operation (ignore/off, unmap/on)",
2634 .name
= "cache.writeback",
2635 .type
= QEMU_OPT_BOOL
,
2636 .help
= "enables writeback mode for any caches",
2638 .name
= "cache.direct",
2639 .type
= QEMU_OPT_BOOL
,
2640 .help
= "enables use of O_DIRECT (bypass the host page cache)",
2642 .name
= "cache.no-flush",
2643 .type
= QEMU_OPT_BOOL
,
2644 .help
= "ignore any flush requests for the device",
2647 .type
= QEMU_OPT_STRING
,
2648 .help
= "host AIO implementation (threads, native)",
2651 .type
= QEMU_OPT_STRING
,
2652 .help
= "disk format (raw, qcow2, ...)",
2655 .type
= QEMU_OPT_STRING
,
2656 .help
= "read error action",
2659 .type
= QEMU_OPT_STRING
,
2660 .help
= "write error action",
2662 .name
= "read-only",
2663 .type
= QEMU_OPT_BOOL
,
2664 .help
= "open drive file as read-only",
2666 .name
= "throttling.iops-total",
2667 .type
= QEMU_OPT_NUMBER
,
2668 .help
= "limit total I/O operations per second",
2670 .name
= "throttling.iops-read",
2671 .type
= QEMU_OPT_NUMBER
,
2672 .help
= "limit read operations per second",
2674 .name
= "throttling.iops-write",
2675 .type
= QEMU_OPT_NUMBER
,
2676 .help
= "limit write operations per second",
2678 .name
= "throttling.bps-total",
2679 .type
= QEMU_OPT_NUMBER
,
2680 .help
= "limit total bytes per second",
2682 .name
= "throttling.bps-read",
2683 .type
= QEMU_OPT_NUMBER
,
2684 .help
= "limit read bytes per second",
2686 .name
= "throttling.bps-write",
2687 .type
= QEMU_OPT_NUMBER
,
2688 .help
= "limit write bytes per second",
2690 .name
= "throttling.iops-total-max",
2691 .type
= QEMU_OPT_NUMBER
,
2692 .help
= "I/O operations burst",
2694 .name
= "throttling.iops-read-max",
2695 .type
= QEMU_OPT_NUMBER
,
2696 .help
= "I/O operations read burst",
2698 .name
= "throttling.iops-write-max",
2699 .type
= QEMU_OPT_NUMBER
,
2700 .help
= "I/O operations write burst",
2702 .name
= "throttling.bps-total-max",
2703 .type
= QEMU_OPT_NUMBER
,
2704 .help
= "total bytes burst",
2706 .name
= "throttling.bps-read-max",
2707 .type
= QEMU_OPT_NUMBER
,
2708 .help
= "total bytes read burst",
2710 .name
= "throttling.bps-write-max",
2711 .type
= QEMU_OPT_NUMBER
,
2712 .help
= "total bytes write burst",
2714 .name
= "throttling.iops-size",
2715 .type
= QEMU_OPT_NUMBER
,
2716 .help
= "when limiting by iops max size of an I/O in bytes",
2718 .name
= "copy-on-read",
2719 .type
= QEMU_OPT_BOOL
,
2720 .help
= "copy read data from backing file into image file",
2722 .name
= "detect-zeroes",
2723 .type
= QEMU_OPT_STRING
,
2724 .help
= "try to optimize zero writes (off, on, unmap)",
2726 { /* end of list */ }
2730 QemuOptsList qemu_drive_opts
= {
2732 .head
= QTAILQ_HEAD_INITIALIZER(qemu_drive_opts
.head
),
2735 * no elements => accept any params
2736 * validation will happen later
2738 { /* end of list */ }