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(BlockDriverState
*bs
)
116 BlockBackend
*blk
= bs
->blk
;
117 DriveInfo
*dinfo
= blk_legacy_dinfo(blk
);
119 if (dinfo
&& !dinfo
->enable_auto_del
) {
124 block_job_cancel(bs
->job
);
131 void blockdev_auto_del(BlockDriverState
*bs
)
133 BlockBackend
*blk
= bs
->blk
;
134 DriveInfo
*dinfo
= blk_legacy_dinfo(blk
);
136 if (dinfo
&& dinfo
->auto_del
) {
142 * Returns the current mapping of how many units per bus
143 * a particular interface can support.
145 * A positive integer indicates n units per bus.
146 * 0 implies the mapping has not been established.
147 * -1 indicates an invalid BlockInterfaceType was given.
149 int drive_get_max_devs(BlockInterfaceType type
)
151 if (type
>= IF_IDE
&& type
< IF_COUNT
) {
152 return if_max_devs
[type
];
158 static int drive_index_to_bus_id(BlockInterfaceType type
, int index
)
160 int max_devs
= if_max_devs
[type
];
161 return max_devs
? index
/ max_devs
: 0;
164 static int drive_index_to_unit_id(BlockInterfaceType type
, int index
)
166 int max_devs
= if_max_devs
[type
];
167 return max_devs
? index
% max_devs
: index
;
170 QemuOpts
*drive_def(const char *optstr
)
172 return qemu_opts_parse(qemu_find_opts("drive"), optstr
, 0);
175 QemuOpts
*drive_add(BlockInterfaceType type
, int index
, const char *file
,
181 opts
= drive_def(optstr
);
185 if (type
!= IF_DEFAULT
) {
186 qemu_opt_set(opts
, "if", if_name
[type
]);
189 snprintf(buf
, sizeof(buf
), "%d", index
);
190 qemu_opt_set(opts
, "index", buf
);
193 qemu_opt_set(opts
, "file", file
);
197 DriveInfo
*drive_get(BlockInterfaceType type
, int bus
, int unit
)
202 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
203 dinfo
= blk_legacy_dinfo(blk
);
204 if (dinfo
&& dinfo
->type
== type
205 && dinfo
->bus
== bus
&& dinfo
->unit
== unit
) {
213 bool drive_check_orphaned(void)
219 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
220 dinfo
= blk_legacy_dinfo(blk
);
221 /* If dinfo->bdrv->dev is NULL, it has no device attached. */
222 /* Unless this is a default drive, this may be an oversight. */
223 if (!dinfo
->bdrv
->dev
&& !dinfo
->is_default
&&
224 dinfo
->type
!= IF_NONE
) {
225 fprintf(stderr
, "Warning: Orphaned drive without device: "
226 "id=%s,file=%s,if=%s,bus=%d,unit=%d\n",
227 dinfo
->id
, dinfo
->bdrv
->filename
, if_name
[dinfo
->type
],
228 dinfo
->bus
, dinfo
->unit
);
236 DriveInfo
*drive_get_by_index(BlockInterfaceType type
, int index
)
238 return drive_get(type
,
239 drive_index_to_bus_id(type
, index
),
240 drive_index_to_unit_id(type
, index
));
243 int drive_get_max_bus(BlockInterfaceType type
)
250 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
251 dinfo
= blk_legacy_dinfo(blk
);
252 if (dinfo
&& dinfo
->type
== type
&& dinfo
->bus
> max_bus
) {
253 max_bus
= dinfo
->bus
;
259 /* Get a block device. This should only be used for single-drive devices
260 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
262 DriveInfo
*drive_get_next(BlockInterfaceType type
)
264 static int next_block_unit
[IF_COUNT
];
266 return drive_get(type
, 0, next_block_unit
[type
]++);
269 DriveInfo
*drive_get_by_blockdev(BlockDriverState
*bs
)
271 return bs
->blk
? blk_legacy_dinfo(bs
->blk
) : NULL
;
274 static void bdrv_format_print(void *opaque
, const char *name
)
276 error_printf(" %s", name
);
281 BlockDriverState
*bs
;
284 static void bdrv_put_ref_bh(void *opaque
)
286 BDRVPutRefBH
*s
= opaque
;
289 qemu_bh_delete(s
->bh
);
294 * Release a BDS reference in a BH
296 * It is not safe to use bdrv_unref() from a callback function when the callers
297 * still need the BlockDriverState. In such cases we schedule a BH to release
300 static void bdrv_put_ref_bh_schedule(BlockDriverState
*bs
)
304 s
= g_new(BDRVPutRefBH
, 1);
305 s
->bh
= qemu_bh_new(bdrv_put_ref_bh
, s
);
307 qemu_bh_schedule(s
->bh
);
310 static int parse_block_error_action(const char *buf
, bool is_read
, Error
**errp
)
312 if (!strcmp(buf
, "ignore")) {
313 return BLOCKDEV_ON_ERROR_IGNORE
;
314 } else if (!is_read
&& !strcmp(buf
, "enospc")) {
315 return BLOCKDEV_ON_ERROR_ENOSPC
;
316 } else if (!strcmp(buf
, "stop")) {
317 return BLOCKDEV_ON_ERROR_STOP
;
318 } else if (!strcmp(buf
, "report")) {
319 return BLOCKDEV_ON_ERROR_REPORT
;
321 error_setg(errp
, "'%s' invalid %s error action",
322 buf
, is_read
? "read" : "write");
327 static bool check_throttle_config(ThrottleConfig
*cfg
, Error
**errp
)
329 if (throttle_conflicting(cfg
)) {
330 error_setg(errp
, "bps/iops/max total values and read/write values"
331 " cannot be used at the same time");
335 if (!throttle_is_valid(cfg
)) {
336 error_setg(errp
, "bps/iops/maxs values must be 0 or greater");
343 typedef enum { MEDIA_DISK
, MEDIA_CDROM
} DriveMediaType
;
345 /* Takes the ownership of bs_opts */
346 static BlockBackend
*blockdev_init(const char *file
, QDict
*bs_opts
,
352 int on_read_error
, on_write_error
;
354 BlockDriverState
*bs
;
363 bool has_driver_specific_opts
;
364 BlockdevDetectZeroesOptions detect_zeroes
;
365 BlockDriver
*drv
= NULL
;
367 /* Check common options by copying from bs_opts to opts, all other options
368 * stay in bs_opts for processing by bdrv_open(). */
369 id
= qdict_get_try_str(bs_opts
, "id");
370 opts
= qemu_opts_create(&qemu_common_drive_opts
, id
, 1, &error
);
372 error_propagate(errp
, error
);
376 qemu_opts_absorb_qdict(opts
, bs_opts
, &error
);
378 error_propagate(errp
, error
);
383 qdict_del(bs_opts
, "id");
386 has_driver_specific_opts
= !!qdict_size(bs_opts
);
388 /* extract parameters */
389 snapshot
= qemu_opt_get_bool(opts
, "snapshot", 0);
390 ro
= qemu_opt_get_bool(opts
, "read-only", 0);
391 copy_on_read
= qemu_opt_get_bool(opts
, "copy-on-read", false);
393 if ((buf
= qemu_opt_get(opts
, "discard")) != NULL
) {
394 if (bdrv_parse_discard_flags(buf
, &bdrv_flags
) != 0) {
395 error_setg(errp
, "invalid discard option");
400 if (qemu_opt_get_bool(opts
, "cache.writeback", true)) {
401 bdrv_flags
|= BDRV_O_CACHE_WB
;
403 if (qemu_opt_get_bool(opts
, "cache.direct", false)) {
404 bdrv_flags
|= BDRV_O_NOCACHE
;
406 if (qemu_opt_get_bool(opts
, "cache.no-flush", false)) {
407 bdrv_flags
|= BDRV_O_NO_FLUSH
;
410 #ifdef CONFIG_LINUX_AIO
411 if ((buf
= qemu_opt_get(opts
, "aio")) != NULL
) {
412 if (!strcmp(buf
, "native")) {
413 bdrv_flags
|= BDRV_O_NATIVE_AIO
;
414 } else if (!strcmp(buf
, "threads")) {
415 /* this is the default */
417 error_setg(errp
, "invalid aio option");
423 if ((buf
= qemu_opt_get(opts
, "format")) != NULL
) {
424 if (is_help_option(buf
)) {
425 error_printf("Supported formats:");
426 bdrv_iterate_format(bdrv_format_print
, NULL
);
431 drv
= bdrv_find_format(buf
);
433 error_setg(errp
, "'%s' invalid format", buf
);
438 /* disk I/O throttling */
439 memset(&cfg
, 0, sizeof(cfg
));
440 cfg
.buckets
[THROTTLE_BPS_TOTAL
].avg
=
441 qemu_opt_get_number(opts
, "throttling.bps-total", 0);
442 cfg
.buckets
[THROTTLE_BPS_READ
].avg
=
443 qemu_opt_get_number(opts
, "throttling.bps-read", 0);
444 cfg
.buckets
[THROTTLE_BPS_WRITE
].avg
=
445 qemu_opt_get_number(opts
, "throttling.bps-write", 0);
446 cfg
.buckets
[THROTTLE_OPS_TOTAL
].avg
=
447 qemu_opt_get_number(opts
, "throttling.iops-total", 0);
448 cfg
.buckets
[THROTTLE_OPS_READ
].avg
=
449 qemu_opt_get_number(opts
, "throttling.iops-read", 0);
450 cfg
.buckets
[THROTTLE_OPS_WRITE
].avg
=
451 qemu_opt_get_number(opts
, "throttling.iops-write", 0);
453 cfg
.buckets
[THROTTLE_BPS_TOTAL
].max
=
454 qemu_opt_get_number(opts
, "throttling.bps-total-max", 0);
455 cfg
.buckets
[THROTTLE_BPS_READ
].max
=
456 qemu_opt_get_number(opts
, "throttling.bps-read-max", 0);
457 cfg
.buckets
[THROTTLE_BPS_WRITE
].max
=
458 qemu_opt_get_number(opts
, "throttling.bps-write-max", 0);
459 cfg
.buckets
[THROTTLE_OPS_TOTAL
].max
=
460 qemu_opt_get_number(opts
, "throttling.iops-total-max", 0);
461 cfg
.buckets
[THROTTLE_OPS_READ
].max
=
462 qemu_opt_get_number(opts
, "throttling.iops-read-max", 0);
463 cfg
.buckets
[THROTTLE_OPS_WRITE
].max
=
464 qemu_opt_get_number(opts
, "throttling.iops-write-max", 0);
466 cfg
.op_size
= qemu_opt_get_number(opts
, "throttling.iops-size", 0);
468 if (!check_throttle_config(&cfg
, &error
)) {
469 error_propagate(errp
, error
);
473 on_write_error
= BLOCKDEV_ON_ERROR_ENOSPC
;
474 if ((buf
= qemu_opt_get(opts
, "werror")) != NULL
) {
475 on_write_error
= parse_block_error_action(buf
, 0, &error
);
477 error_propagate(errp
, error
);
482 on_read_error
= BLOCKDEV_ON_ERROR_REPORT
;
483 if ((buf
= qemu_opt_get(opts
, "rerror")) != NULL
) {
484 on_read_error
= parse_block_error_action(buf
, 1, &error
);
486 error_propagate(errp
, error
);
492 qapi_enum_parse(BlockdevDetectZeroesOptions_lookup
,
493 qemu_opt_get(opts
, "detect-zeroes"),
494 BLOCKDEV_DETECT_ZEROES_OPTIONS_MAX
,
495 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF
,
498 error_propagate(errp
, error
);
502 if (detect_zeroes
== BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP
&&
503 !(bdrv_flags
& BDRV_O_UNMAP
)) {
504 error_setg(errp
, "setting detect-zeroes to unmap is not allowed "
505 "without setting discard operation to unmap");
510 blk
= blk_new_with_bs(qemu_opts_id(opts
), errp
);
515 bs
->open_flags
= snapshot
? BDRV_O_SNAPSHOT
: 0;
517 bs
->detect_zeroes
= detect_zeroes
;
519 bdrv_set_on_error(bs
, on_read_error
, on_write_error
);
521 /* disk I/O throttling */
522 if (throttle_enabled(&cfg
)) {
523 bdrv_io_limits_enable(bs
);
524 bdrv_set_io_limits(bs
, &cfg
);
527 dinfo
= g_malloc0(sizeof(*dinfo
));
528 dinfo
->id
= g_strdup(qemu_opts_id(opts
));
530 blk_set_legacy_dinfo(blk
, dinfo
);
532 if (!file
|| !*file
) {
533 if (has_driver_specific_opts
) {
542 /* always use cache=unsafe with snapshot */
543 bdrv_flags
&= ~BDRV_O_CACHE_MASK
;
544 bdrv_flags
|= (BDRV_O_SNAPSHOT
|BDRV_O_CACHE_WB
|BDRV_O_NO_FLUSH
);
548 bdrv_flags
|= BDRV_O_COPY_ON_READ
;
551 if (runstate_check(RUN_STATE_INMIGRATE
)) {
552 bdrv_flags
|= BDRV_O_INCOMING
;
555 bdrv_flags
|= ro
? 0 : BDRV_O_RDWR
;
558 ret
= bdrv_open(&bs
, file
, NULL
, bs_opts
, bdrv_flags
, drv
, &error
);
559 assert(bs
== dinfo
->bdrv
);
562 error_setg(errp
, "could not open disk image %s: %s",
563 file
?: dinfo
->id
, error_get_pretty(error
));
568 if (bdrv_key_required(bs
)) {
586 static void qemu_opt_rename(QemuOpts
*opts
, const char *from
, const char *to
,
591 value
= qemu_opt_get(opts
, from
);
593 if (qemu_opt_find(opts
, to
)) {
594 error_setg(errp
, "'%s' and its alias '%s' can't be used at the "
595 "same time", to
, from
);
600 /* rename all items in opts */
601 while ((value
= qemu_opt_get(opts
, from
))) {
602 qemu_opt_set(opts
, to
, value
);
603 qemu_opt_unset(opts
, from
);
607 QemuOptsList qemu_legacy_drive_opts
= {
609 .head
= QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts
.head
),
613 .type
= QEMU_OPT_NUMBER
,
614 .help
= "bus number",
617 .type
= QEMU_OPT_NUMBER
,
618 .help
= "unit number (i.e. lun for scsi)",
621 .type
= QEMU_OPT_NUMBER
,
622 .help
= "index number",
625 .type
= QEMU_OPT_STRING
,
626 .help
= "media type (disk, cdrom)",
629 .type
= QEMU_OPT_STRING
,
630 .help
= "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
633 .type
= QEMU_OPT_NUMBER
,
634 .help
= "number of cylinders (ide disk geometry)",
637 .type
= QEMU_OPT_NUMBER
,
638 .help
= "number of heads (ide disk geometry)",
641 .type
= QEMU_OPT_NUMBER
,
642 .help
= "number of sectors (ide disk geometry)",
645 .type
= QEMU_OPT_STRING
,
646 .help
= "chs translation (auto, lba, none)",
649 .type
= QEMU_OPT_BOOL
,
650 .help
= "(deprecated, ignored)",
653 .type
= QEMU_OPT_STRING
,
654 .help
= "pci address (virtio only)",
657 .type
= QEMU_OPT_STRING
,
658 .help
= "disk serial number",
661 .type
= QEMU_OPT_STRING
,
665 /* Options that are passed on, but have special semantics with -drive */
668 .type
= QEMU_OPT_BOOL
,
669 .help
= "open drive file as read-only",
672 .type
= QEMU_OPT_STRING
,
673 .help
= "read error action",
676 .type
= QEMU_OPT_STRING
,
677 .help
= "write error action",
679 .name
= "copy-on-read",
680 .type
= QEMU_OPT_BOOL
,
681 .help
= "copy read data from backing file into image file",
684 { /* end of list */ }
688 DriveInfo
*drive_new(QemuOpts
*all_opts
, BlockInterfaceType block_default_type
)
692 DriveInfo
*dinfo
= NULL
;
694 QemuOpts
*legacy_opts
;
695 DriveMediaType media
= MEDIA_DISK
;
696 BlockInterfaceType type
;
697 int cyls
, heads
, secs
, translation
;
698 int max_devs
, bus_id
, unit_id
, index
;
700 const char *werror
, *rerror
;
701 bool read_only
= false;
704 const char *filename
;
705 Error
*local_err
= NULL
;
708 /* Change legacy command line options into QMP ones */
709 static const struct {
713 { "iops", "throttling.iops-total" },
714 { "iops_rd", "throttling.iops-read" },
715 { "iops_wr", "throttling.iops-write" },
717 { "bps", "throttling.bps-total" },
718 { "bps_rd", "throttling.bps-read" },
719 { "bps_wr", "throttling.bps-write" },
721 { "iops_max", "throttling.iops-total-max" },
722 { "iops_rd_max", "throttling.iops-read-max" },
723 { "iops_wr_max", "throttling.iops-write-max" },
725 { "bps_max", "throttling.bps-total-max" },
726 { "bps_rd_max", "throttling.bps-read-max" },
727 { "bps_wr_max", "throttling.bps-write-max" },
729 { "iops_size", "throttling.iops-size" },
731 { "readonly", "read-only" },
734 for (i
= 0; i
< ARRAY_SIZE(opt_renames
); i
++) {
735 qemu_opt_rename(all_opts
, opt_renames
[i
].from
, opt_renames
[i
].to
,
738 error_report("%s", error_get_pretty(local_err
));
739 error_free(local_err
);
744 value
= qemu_opt_get(all_opts
, "cache");
748 if (bdrv_parse_cache_flags(value
, &flags
) != 0) {
749 error_report("invalid cache option");
753 /* Specific options take precedence */
754 if (!qemu_opt_get(all_opts
, "cache.writeback")) {
755 qemu_opt_set_bool(all_opts
, "cache.writeback",
756 !!(flags
& BDRV_O_CACHE_WB
));
758 if (!qemu_opt_get(all_opts
, "cache.direct")) {
759 qemu_opt_set_bool(all_opts
, "cache.direct",
760 !!(flags
& BDRV_O_NOCACHE
));
762 if (!qemu_opt_get(all_opts
, "cache.no-flush")) {
763 qemu_opt_set_bool(all_opts
, "cache.no-flush",
764 !!(flags
& BDRV_O_NO_FLUSH
));
766 qemu_opt_unset(all_opts
, "cache");
769 /* Get a QDict for processing the options */
770 bs_opts
= qdict_new();
771 qemu_opts_to_qdict(all_opts
, bs_opts
);
773 legacy_opts
= qemu_opts_create(&qemu_legacy_drive_opts
, NULL
, 0,
775 qemu_opts_absorb_qdict(legacy_opts
, bs_opts
, &local_err
);
777 error_report("%s", error_get_pretty(local_err
));
778 error_free(local_err
);
782 /* Deprecated option boot=[on|off] */
783 if (qemu_opt_get(legacy_opts
, "boot") != NULL
) {
784 fprintf(stderr
, "qemu-kvm: boot=on|off is deprecated and will be "
785 "ignored. Future versions will reject this parameter. Please "
786 "update your scripts.\n");
790 value
= qemu_opt_get(legacy_opts
, "media");
792 if (!strcmp(value
, "disk")) {
794 } else if (!strcmp(value
, "cdrom")) {
798 error_report("'%s' invalid media", value
);
803 /* copy-on-read is disabled with a warning for read-only devices */
804 read_only
|= qemu_opt_get_bool(legacy_opts
, "read-only", false);
805 copy_on_read
= qemu_opt_get_bool(legacy_opts
, "copy-on-read", false);
807 if (read_only
&& copy_on_read
) {
808 error_report("warning: disabling copy-on-read on read-only drive");
809 copy_on_read
= false;
812 qdict_put(bs_opts
, "read-only",
813 qstring_from_str(read_only
? "on" : "off"));
814 qdict_put(bs_opts
, "copy-on-read",
815 qstring_from_str(copy_on_read
? "on" :"off"));
817 /* Controller type */
818 value
= qemu_opt_get(legacy_opts
, "if");
821 type
< IF_COUNT
&& strcmp(value
, if_name
[type
]);
824 if (type
== IF_COUNT
) {
825 error_report("unsupported bus type '%s'", value
);
829 type
= block_default_type
;
833 cyls
= qemu_opt_get_number(legacy_opts
, "cyls", 0);
834 heads
= qemu_opt_get_number(legacy_opts
, "heads", 0);
835 secs
= qemu_opt_get_number(legacy_opts
, "secs", 0);
837 if (cyls
|| heads
|| secs
) {
839 error_report("invalid physical cyls number");
843 error_report("invalid physical heads number");
847 error_report("invalid physical secs number");
852 translation
= BIOS_ATA_TRANSLATION_AUTO
;
853 value
= qemu_opt_get(legacy_opts
, "trans");
856 error_report("'%s' trans must be used with cyls, heads and secs",
860 if (!strcmp(value
, "none")) {
861 translation
= BIOS_ATA_TRANSLATION_NONE
;
862 } else if (!strcmp(value
, "lba")) {
863 translation
= BIOS_ATA_TRANSLATION_LBA
;
864 } else if (!strcmp(value
, "large")) {
865 translation
= BIOS_ATA_TRANSLATION_LARGE
;
866 } else if (!strcmp(value
, "rechs")) {
867 translation
= BIOS_ATA_TRANSLATION_RECHS
;
868 } else if (!strcmp(value
, "auto")) {
869 translation
= BIOS_ATA_TRANSLATION_AUTO
;
871 error_report("'%s' invalid translation type", value
);
876 if (media
== MEDIA_CDROM
) {
877 if (cyls
|| secs
|| heads
) {
878 error_report("CHS can't be set with media=cdrom");
883 /* Device address specified by bus/unit or index.
884 * If none was specified, try to find the first free one. */
885 bus_id
= qemu_opt_get_number(legacy_opts
, "bus", 0);
886 unit_id
= qemu_opt_get_number(legacy_opts
, "unit", -1);
887 index
= qemu_opt_get_number(legacy_opts
, "index", -1);
889 max_devs
= if_max_devs
[type
];
892 if (bus_id
!= 0 || unit_id
!= -1) {
893 error_report("index cannot be used with bus and unit");
896 bus_id
= drive_index_to_bus_id(type
, index
);
897 unit_id
= drive_index_to_unit_id(type
, index
);
902 while (drive_get(type
, bus_id
, unit_id
) != NULL
) {
904 if (max_devs
&& unit_id
>= max_devs
) {
911 if (max_devs
&& unit_id
>= max_devs
) {
912 error_report("unit %d too big (max is %d)", unit_id
, max_devs
- 1);
916 if (drive_get(type
, bus_id
, unit_id
) != NULL
) {
917 error_report("drive with bus=%d, unit=%d (index=%d) exists",
918 bus_id
, unit_id
, index
);
923 serial
= qemu_opt_get(legacy_opts
, "serial");
925 /* no id supplied -> create one */
926 if (qemu_opts_id(all_opts
) == NULL
) {
928 const char *mediastr
= "";
929 if (type
== IF_IDE
|| type
== IF_SCSI
) {
930 mediastr
= (media
== MEDIA_CDROM
) ? "-cd" : "-hd";
933 new_id
= g_strdup_printf("%s%i%s%i", if_name
[type
], bus_id
,
936 new_id
= g_strdup_printf("%s%s%i", if_name
[type
],
939 qdict_put(bs_opts
, "id", qstring_from_str(new_id
));
943 /* Add virtio block device */
944 devaddr
= qemu_opt_get(legacy_opts
, "addr");
945 if (devaddr
&& type
!= IF_VIRTIO
) {
946 error_report("addr is not supported by this bus type");
950 if (type
== IF_VIRTIO
) {
952 devopts
= qemu_opts_create(qemu_find_opts("device"), NULL
, 0,
954 if (arch_type
== QEMU_ARCH_S390X
) {
955 qemu_opt_set(devopts
, "driver", "virtio-blk-s390");
957 qemu_opt_set(devopts
, "driver", "virtio-blk-pci");
959 qemu_opt_set(devopts
, "drive", qdict_get_str(bs_opts
, "id"));
961 qemu_opt_set(devopts
, "addr", devaddr
);
965 filename
= qemu_opt_get(legacy_opts
, "file");
967 /* Check werror/rerror compatibility with if=... */
968 werror
= qemu_opt_get(legacy_opts
, "werror");
969 if (werror
!= NULL
) {
970 if (type
!= IF_IDE
&& type
!= IF_SCSI
&& type
!= IF_VIRTIO
&&
972 error_report("werror is not supported by this bus type");
975 qdict_put(bs_opts
, "werror", qstring_from_str(werror
));
978 rerror
= qemu_opt_get(legacy_opts
, "rerror");
979 if (rerror
!= NULL
) {
980 if (type
!= IF_IDE
&& type
!= IF_VIRTIO
&& type
!= IF_SCSI
&&
982 error_report("rerror is not supported by this bus type");
985 qdict_put(bs_opts
, "rerror", qstring_from_str(rerror
));
988 /* Actual block device init: Functionality shared with blockdev-add */
989 blk
= blockdev_init(filename
, bs_opts
, &local_err
);
993 error_report("%s", error_get_pretty(local_err
));
994 error_free(local_err
);
1001 /* Set legacy DriveInfo fields */
1002 dinfo
= blk_legacy_dinfo(blk
);
1003 dinfo
->enable_auto_del
= true;
1004 dinfo
->opts
= all_opts
;
1007 dinfo
->heads
= heads
;
1009 dinfo
->trans
= translation
;
1012 dinfo
->bus
= bus_id
;
1013 dinfo
->unit
= unit_id
;
1014 dinfo
->devaddr
= devaddr
;
1016 dinfo
->serial
= g_strdup(serial
);
1023 dinfo
->media_cd
= media
== MEDIA_CDROM
;
1030 qemu_opts_del(legacy_opts
);
1035 void do_commit(Monitor
*mon
, const QDict
*qdict
)
1037 const char *device
= qdict_get_str(qdict
, "device");
1038 BlockDriverState
*bs
;
1041 if (!strcmp(device
, "all")) {
1042 ret
= bdrv_commit_all();
1044 bs
= bdrv_find(device
);
1046 monitor_printf(mon
, "Device '%s' not found\n", device
);
1049 ret
= bdrv_commit(bs
);
1052 monitor_printf(mon
, "'commit' error for '%s': %s\n", device
,
1057 static void blockdev_do_action(int kind
, void *data
, Error
**errp
)
1059 TransactionAction action
;
1060 TransactionActionList list
;
1064 list
.value
= &action
;
1066 qmp_transaction(&list
, errp
);
1069 void qmp_blockdev_snapshot_sync(bool has_device
, const char *device
,
1070 bool has_node_name
, const char *node_name
,
1071 const char *snapshot_file
,
1072 bool has_snapshot_node_name
,
1073 const char *snapshot_node_name
,
1074 bool has_format
, const char *format
,
1075 bool has_mode
, NewImageMode mode
, Error
**errp
)
1077 BlockdevSnapshot snapshot
= {
1078 .has_device
= has_device
,
1079 .device
= (char *) device
,
1080 .has_node_name
= has_node_name
,
1081 .node_name
= (char *) node_name
,
1082 .snapshot_file
= (char *) snapshot_file
,
1083 .has_snapshot_node_name
= has_snapshot_node_name
,
1084 .snapshot_node_name
= (char *) snapshot_node_name
,
1085 .has_format
= has_format
,
1086 .format
= (char *) format
,
1087 .has_mode
= has_mode
,
1090 blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
,
1094 void qmp_blockdev_snapshot_internal_sync(const char *device
,
1098 BlockdevSnapshotInternal snapshot
= {
1099 .device
= (char *) device
,
1100 .name
= (char *) name
1103 blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
,
1107 SnapshotInfo
*qmp_blockdev_snapshot_delete_internal_sync(const char *device
,
1114 BlockDriverState
*bs
= bdrv_find(device
);
1115 QEMUSnapshotInfo sn
;
1116 Error
*local_err
= NULL
;
1117 SnapshotInfo
*info
= NULL
;
1121 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
1134 error_setg(errp
, "Name or id must be provided");
1138 ret
= bdrv_snapshot_find_by_id_and_name(bs
, id
, name
, &sn
, &local_err
);
1140 error_propagate(errp
, local_err
);
1145 "Snapshot with id '%s' and name '%s' does not exist on "
1147 STR_OR_NULL(id
), STR_OR_NULL(name
), device
);
1151 bdrv_snapshot_delete(bs
, id
, name
, &local_err
);
1153 error_propagate(errp
, local_err
);
1157 info
= g_new0(SnapshotInfo
, 1);
1158 info
->id
= g_strdup(sn
.id_str
);
1159 info
->name
= g_strdup(sn
.name
);
1160 info
->date_nsec
= sn
.date_nsec
;
1161 info
->date_sec
= sn
.date_sec
;
1162 info
->vm_state_size
= sn
.vm_state_size
;
1163 info
->vm_clock_nsec
= sn
.vm_clock_nsec
% 1000000000;
1164 info
->vm_clock_sec
= sn
.vm_clock_nsec
/ 1000000000;
1169 /* New and old BlockDriverState structs for group snapshots */
1171 typedef struct BlkTransactionState BlkTransactionState
;
1173 /* Only prepare() may fail. In a single transaction, only one of commit() or
1174 abort() will be called, clean() will always be called if it present. */
1175 typedef struct BdrvActionOps
{
1176 /* Size of state struct, in bytes. */
1177 size_t instance_size
;
1178 /* Prepare the work, must NOT be NULL. */
1179 void (*prepare
)(BlkTransactionState
*common
, Error
**errp
);
1180 /* Commit the changes, can be NULL. */
1181 void (*commit
)(BlkTransactionState
*common
);
1182 /* Abort the changes on fail, can be NULL. */
1183 void (*abort
)(BlkTransactionState
*common
);
1184 /* Clean up resource in the end, can be NULL. */
1185 void (*clean
)(BlkTransactionState
*common
);
1189 * This structure must be arranged as first member in child type, assuming
1190 * that compiler will also arrange it to the same address with parent instance.
1191 * Later it will be used in free().
1193 struct BlkTransactionState
{
1194 TransactionAction
*action
;
1195 const BdrvActionOps
*ops
;
1196 QSIMPLEQ_ENTRY(BlkTransactionState
) entry
;
1199 /* internal snapshot private data */
1200 typedef struct InternalSnapshotState
{
1201 BlkTransactionState common
;
1202 BlockDriverState
*bs
;
1203 QEMUSnapshotInfo sn
;
1204 } InternalSnapshotState
;
1206 static void internal_snapshot_prepare(BlkTransactionState
*common
,
1209 Error
*local_err
= NULL
;
1212 BlockDriverState
*bs
;
1213 QEMUSnapshotInfo old_sn
, *sn
;
1216 BlockdevSnapshotInternal
*internal
;
1217 InternalSnapshotState
*state
;
1220 g_assert(common
->action
->kind
==
1221 TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
);
1222 internal
= common
->action
->blockdev_snapshot_internal_sync
;
1223 state
= DO_UPCAST(InternalSnapshotState
, common
, common
);
1225 /* 1. parse input */
1226 device
= internal
->device
;
1227 name
= internal
->name
;
1229 /* 2. check for validation */
1230 bs
= bdrv_find(device
);
1232 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
1236 if (!bdrv_is_inserted(bs
)) {
1237 error_set(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
1241 if (bdrv_is_read_only(bs
)) {
1242 error_set(errp
, QERR_DEVICE_IS_READ_ONLY
, device
);
1246 if (!bdrv_can_snapshot(bs
)) {
1247 error_set(errp
, QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED
,
1248 bs
->drv
->format_name
, device
, "internal snapshot");
1252 if (!strlen(name
)) {
1253 error_setg(errp
, "Name is empty");
1257 /* check whether a snapshot with name exist */
1258 ret
= bdrv_snapshot_find_by_id_and_name(bs
, NULL
, name
, &old_sn
,
1261 error_propagate(errp
, local_err
);
1265 "Snapshot with name '%s' already exists on device '%s'",
1270 /* 3. take the snapshot */
1272 pstrcpy(sn
->name
, sizeof(sn
->name
), name
);
1273 qemu_gettimeofday(&tv
);
1274 sn
->date_sec
= tv
.tv_sec
;
1275 sn
->date_nsec
= tv
.tv_usec
* 1000;
1276 sn
->vm_clock_nsec
= qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
);
1278 ret1
= bdrv_snapshot_create(bs
, sn
);
1280 error_setg_errno(errp
, -ret1
,
1281 "Failed to create snapshot '%s' on device '%s'",
1286 /* 4. succeed, mark a snapshot is created */
1290 static void internal_snapshot_abort(BlkTransactionState
*common
)
1292 InternalSnapshotState
*state
=
1293 DO_UPCAST(InternalSnapshotState
, common
, common
);
1294 BlockDriverState
*bs
= state
->bs
;
1295 QEMUSnapshotInfo
*sn
= &state
->sn
;
1296 Error
*local_error
= NULL
;
1302 if (bdrv_snapshot_delete(bs
, sn
->id_str
, sn
->name
, &local_error
) < 0) {
1303 error_report("Failed to delete snapshot with id '%s' and name '%s' on "
1304 "device '%s' in abort: %s",
1307 bdrv_get_device_name(bs
),
1308 error_get_pretty(local_error
));
1309 error_free(local_error
);
1313 /* external snapshot private data */
1314 typedef struct ExternalSnapshotState
{
1315 BlkTransactionState common
;
1316 BlockDriverState
*old_bs
;
1317 BlockDriverState
*new_bs
;
1318 } ExternalSnapshotState
;
1320 static void external_snapshot_prepare(BlkTransactionState
*common
,
1325 QDict
*options
= NULL
;
1326 Error
*local_err
= NULL
;
1327 bool has_device
= false;
1329 bool has_node_name
= false;
1330 const char *node_name
;
1331 bool has_snapshot_node_name
= false;
1332 const char *snapshot_node_name
;
1333 const char *new_image_file
;
1334 const char *format
= "qcow2";
1335 enum NewImageMode mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
1336 ExternalSnapshotState
*state
=
1337 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1338 TransactionAction
*action
= common
->action
;
1340 /* get parameters */
1341 g_assert(action
->kind
== TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
);
1343 has_device
= action
->blockdev_snapshot_sync
->has_device
;
1344 device
= action
->blockdev_snapshot_sync
->device
;
1345 has_node_name
= action
->blockdev_snapshot_sync
->has_node_name
;
1346 node_name
= action
->blockdev_snapshot_sync
->node_name
;
1347 has_snapshot_node_name
=
1348 action
->blockdev_snapshot_sync
->has_snapshot_node_name
;
1349 snapshot_node_name
= action
->blockdev_snapshot_sync
->snapshot_node_name
;
1351 new_image_file
= action
->blockdev_snapshot_sync
->snapshot_file
;
1352 if (action
->blockdev_snapshot_sync
->has_format
) {
1353 format
= action
->blockdev_snapshot_sync
->format
;
1355 if (action
->blockdev_snapshot_sync
->has_mode
) {
1356 mode
= action
->blockdev_snapshot_sync
->mode
;
1359 /* start processing */
1360 drv
= bdrv_find_format(format
);
1362 error_set(errp
, QERR_INVALID_BLOCK_FORMAT
, format
);
1366 state
->old_bs
= bdrv_lookup_bs(has_device
? device
: NULL
,
1367 has_node_name
? node_name
: NULL
,
1370 error_propagate(errp
, local_err
);
1374 if (has_node_name
&& !has_snapshot_node_name
) {
1375 error_setg(errp
, "New snapshot node name missing");
1379 if (has_snapshot_node_name
&& bdrv_find_node(snapshot_node_name
)) {
1380 error_setg(errp
, "New snapshot node name already existing");
1384 if (!bdrv_is_inserted(state
->old_bs
)) {
1385 error_set(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
1389 if (bdrv_op_is_blocked(state
->old_bs
,
1390 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT
, errp
)) {
1394 if (!bdrv_is_read_only(state
->old_bs
)) {
1395 if (bdrv_flush(state
->old_bs
)) {
1396 error_set(errp
, QERR_IO_ERROR
);
1401 if (!bdrv_is_first_non_filter(state
->old_bs
)) {
1402 error_set(errp
, QERR_FEATURE_DISABLED
, "snapshot");
1406 flags
= state
->old_bs
->open_flags
;
1408 /* create new image w/backing file */
1409 if (mode
!= NEW_IMAGE_MODE_EXISTING
) {
1410 bdrv_img_create(new_image_file
, format
,
1411 state
->old_bs
->filename
,
1412 state
->old_bs
->drv
->format_name
,
1413 NULL
, -1, flags
, &local_err
, false);
1415 error_propagate(errp
, local_err
);
1420 if (has_snapshot_node_name
) {
1421 options
= qdict_new();
1422 qdict_put(options
, "node-name",
1423 qstring_from_str(snapshot_node_name
));
1426 /* TODO Inherit bs->options or only take explicit options with an
1427 * extended QMP command? */
1428 assert(state
->new_bs
== NULL
);
1429 ret
= bdrv_open(&state
->new_bs
, new_image_file
, NULL
, options
,
1430 flags
| BDRV_O_NO_BACKING
, drv
, &local_err
);
1431 /* We will manually add the backing_hd field to the bs later */
1433 error_propagate(errp
, local_err
);
1437 static void external_snapshot_commit(BlkTransactionState
*common
)
1439 ExternalSnapshotState
*state
=
1440 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1442 /* This removes our old bs and adds the new bs */
1443 bdrv_append(state
->new_bs
, state
->old_bs
);
1444 /* We don't need (or want) to use the transactional
1445 * bdrv_reopen_multiple() across all the entries at once, because we
1446 * don't want to abort all of them if one of them fails the reopen */
1447 bdrv_reopen(state
->new_bs
, state
->new_bs
->open_flags
& ~BDRV_O_RDWR
,
1451 static void external_snapshot_abort(BlkTransactionState
*common
)
1453 ExternalSnapshotState
*state
=
1454 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1455 if (state
->new_bs
) {
1456 bdrv_unref(state
->new_bs
);
1460 typedef struct DriveBackupState
{
1461 BlkTransactionState common
;
1462 BlockDriverState
*bs
;
1466 static void drive_backup_prepare(BlkTransactionState
*common
, Error
**errp
)
1468 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1469 DriveBackup
*backup
;
1470 Error
*local_err
= NULL
;
1472 assert(common
->action
->kind
== TRANSACTION_ACTION_KIND_DRIVE_BACKUP
);
1473 backup
= common
->action
->drive_backup
;
1475 qmp_drive_backup(backup
->device
, backup
->target
,
1476 backup
->has_format
, backup
->format
,
1478 backup
->has_mode
, backup
->mode
,
1479 backup
->has_speed
, backup
->speed
,
1480 backup
->has_on_source_error
, backup
->on_source_error
,
1481 backup
->has_on_target_error
, backup
->on_target_error
,
1484 error_propagate(errp
, local_err
);
1490 state
->bs
= bdrv_find(backup
->device
);
1491 state
->job
= state
->bs
->job
;
1494 static void drive_backup_abort(BlkTransactionState
*common
)
1496 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1497 BlockDriverState
*bs
= state
->bs
;
1499 /* Only cancel if it's the job we started */
1500 if (bs
&& bs
->job
&& bs
->job
== state
->job
) {
1501 block_job_cancel_sync(bs
->job
);
1505 static void abort_prepare(BlkTransactionState
*common
, Error
**errp
)
1507 error_setg(errp
, "Transaction aborted using Abort action");
1510 static void abort_commit(BlkTransactionState
*common
)
1512 g_assert_not_reached(); /* this action never succeeds */
1515 static const BdrvActionOps actions
[] = {
1516 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
] = {
1517 .instance_size
= sizeof(ExternalSnapshotState
),
1518 .prepare
= external_snapshot_prepare
,
1519 .commit
= external_snapshot_commit
,
1520 .abort
= external_snapshot_abort
,
1522 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP
] = {
1523 .instance_size
= sizeof(DriveBackupState
),
1524 .prepare
= drive_backup_prepare
,
1525 .abort
= drive_backup_abort
,
1527 [TRANSACTION_ACTION_KIND_ABORT
] = {
1528 .instance_size
= sizeof(BlkTransactionState
),
1529 .prepare
= abort_prepare
,
1530 .commit
= abort_commit
,
1532 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
] = {
1533 .instance_size
= sizeof(InternalSnapshotState
),
1534 .prepare
= internal_snapshot_prepare
,
1535 .abort
= internal_snapshot_abort
,
1540 * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
1541 * then we do not pivot any of the devices in the group, and abandon the
1544 void qmp_transaction(TransactionActionList
*dev_list
, Error
**errp
)
1546 TransactionActionList
*dev_entry
= dev_list
;
1547 BlkTransactionState
*state
, *next
;
1548 Error
*local_err
= NULL
;
1550 QSIMPLEQ_HEAD(snap_bdrv_states
, BlkTransactionState
) snap_bdrv_states
;
1551 QSIMPLEQ_INIT(&snap_bdrv_states
);
1553 /* drain all i/o before any snapshots */
1556 /* We don't do anything in this loop that commits us to the snapshot */
1557 while (NULL
!= dev_entry
) {
1558 TransactionAction
*dev_info
= NULL
;
1559 const BdrvActionOps
*ops
;
1561 dev_info
= dev_entry
->value
;
1562 dev_entry
= dev_entry
->next
;
1564 assert(dev_info
->kind
< ARRAY_SIZE(actions
));
1566 ops
= &actions
[dev_info
->kind
];
1567 assert(ops
->instance_size
> 0);
1569 state
= g_malloc0(ops
->instance_size
);
1571 state
->action
= dev_info
;
1572 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states
, state
, entry
);
1574 state
->ops
->prepare(state
, &local_err
);
1576 error_propagate(errp
, local_err
);
1577 goto delete_and_fail
;
1581 QSIMPLEQ_FOREACH(state
, &snap_bdrv_states
, entry
) {
1582 if (state
->ops
->commit
) {
1583 state
->ops
->commit(state
);
1592 * failure, and it is all-or-none; abandon each new bs, and keep using
1593 * the original bs for all images
1595 QSIMPLEQ_FOREACH(state
, &snap_bdrv_states
, entry
) {
1596 if (state
->ops
->abort
) {
1597 state
->ops
->abort(state
);
1601 QSIMPLEQ_FOREACH_SAFE(state
, &snap_bdrv_states
, entry
, next
) {
1602 if (state
->ops
->clean
) {
1603 state
->ops
->clean(state
);
1610 static void eject_device(BlockDriverState
*bs
, int force
, Error
**errp
)
1612 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_EJECT
, errp
)) {
1615 if (!bdrv_dev_has_removable_media(bs
)) {
1616 error_setg(errp
, "Device '%s' is not removable",
1617 bdrv_get_device_name(bs
));
1621 if (bdrv_dev_is_medium_locked(bs
) && !bdrv_dev_is_tray_open(bs
)) {
1622 bdrv_dev_eject_request(bs
, force
);
1624 error_setg(errp
, "Device '%s' is locked",
1625 bdrv_get_device_name(bs
));
1633 void qmp_eject(const char *device
, bool has_force
, bool force
, Error
**errp
)
1635 BlockDriverState
*bs
;
1637 bs
= bdrv_find(device
);
1639 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
1643 eject_device(bs
, force
, errp
);
1646 void qmp_block_passwd(bool has_device
, const char *device
,
1647 bool has_node_name
, const char *node_name
,
1648 const char *password
, Error
**errp
)
1650 Error
*local_err
= NULL
;
1651 BlockDriverState
*bs
;
1654 bs
= bdrv_lookup_bs(has_device
? device
: NULL
,
1655 has_node_name
? node_name
: NULL
,
1658 error_propagate(errp
, local_err
);
1662 err
= bdrv_set_key(bs
, password
);
1663 if (err
== -EINVAL
) {
1664 error_set(errp
, QERR_DEVICE_NOT_ENCRYPTED
, bdrv_get_device_name(bs
));
1666 } else if (err
< 0) {
1667 error_set(errp
, QERR_INVALID_PASSWORD
);
1672 static void qmp_bdrv_open_encrypted(BlockDriverState
*bs
, const char *filename
,
1673 int bdrv_flags
, BlockDriver
*drv
,
1674 const char *password
, Error
**errp
)
1676 Error
*local_err
= NULL
;
1679 ret
= bdrv_open(&bs
, filename
, NULL
, NULL
, bdrv_flags
, drv
, &local_err
);
1681 error_propagate(errp
, local_err
);
1685 if (bdrv_key_required(bs
)) {
1687 if (bdrv_set_key(bs
, password
) < 0) {
1688 error_set(errp
, QERR_INVALID_PASSWORD
);
1691 error_set(errp
, QERR_DEVICE_ENCRYPTED
, bdrv_get_device_name(bs
),
1692 bdrv_get_encrypted_filename(bs
));
1694 } else if (password
) {
1695 error_set(errp
, QERR_DEVICE_NOT_ENCRYPTED
, bdrv_get_device_name(bs
));
1699 void qmp_change_blockdev(const char *device
, const char *filename
,
1700 const char *format
, Error
**errp
)
1702 BlockDriverState
*bs
;
1703 BlockDriver
*drv
= NULL
;
1707 bs
= bdrv_find(device
);
1709 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
1714 drv
= bdrv_find_whitelisted_format(format
, bs
->read_only
);
1716 error_set(errp
, QERR_INVALID_BLOCK_FORMAT
, format
);
1721 eject_device(bs
, 0, &err
);
1723 error_propagate(errp
, err
);
1727 bdrv_flags
= bdrv_is_read_only(bs
) ? 0 : BDRV_O_RDWR
;
1728 bdrv_flags
|= bdrv_is_snapshot(bs
) ? BDRV_O_SNAPSHOT
: 0;
1730 qmp_bdrv_open_encrypted(bs
, filename
, bdrv_flags
, drv
, NULL
, errp
);
1733 /* throttling disk I/O limits */
1734 void qmp_block_set_io_throttle(const char *device
, int64_t bps
, int64_t bps_rd
,
1741 bool has_bps_rd_max
,
1743 bool has_bps_wr_max
,
1747 bool has_iops_rd_max
,
1748 int64_t iops_rd_max
,
1749 bool has_iops_wr_max
,
1750 int64_t iops_wr_max
,
1752 int64_t iops_size
, Error
**errp
)
1755 BlockDriverState
*bs
;
1756 AioContext
*aio_context
;
1758 bs
= bdrv_find(device
);
1760 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
1764 memset(&cfg
, 0, sizeof(cfg
));
1765 cfg
.buckets
[THROTTLE_BPS_TOTAL
].avg
= bps
;
1766 cfg
.buckets
[THROTTLE_BPS_READ
].avg
= bps_rd
;
1767 cfg
.buckets
[THROTTLE_BPS_WRITE
].avg
= bps_wr
;
1769 cfg
.buckets
[THROTTLE_OPS_TOTAL
].avg
= iops
;
1770 cfg
.buckets
[THROTTLE_OPS_READ
].avg
= iops_rd
;
1771 cfg
.buckets
[THROTTLE_OPS_WRITE
].avg
= iops_wr
;
1774 cfg
.buckets
[THROTTLE_BPS_TOTAL
].max
= bps_max
;
1776 if (has_bps_rd_max
) {
1777 cfg
.buckets
[THROTTLE_BPS_READ
].max
= bps_rd_max
;
1779 if (has_bps_wr_max
) {
1780 cfg
.buckets
[THROTTLE_BPS_WRITE
].max
= bps_wr_max
;
1783 cfg
.buckets
[THROTTLE_OPS_TOTAL
].max
= iops_max
;
1785 if (has_iops_rd_max
) {
1786 cfg
.buckets
[THROTTLE_OPS_READ
].max
= iops_rd_max
;
1788 if (has_iops_wr_max
) {
1789 cfg
.buckets
[THROTTLE_OPS_WRITE
].max
= iops_wr_max
;
1792 if (has_iops_size
) {
1793 cfg
.op_size
= iops_size
;
1796 if (!check_throttle_config(&cfg
, errp
)) {
1800 aio_context
= bdrv_get_aio_context(bs
);
1801 aio_context_acquire(aio_context
);
1803 if (!bs
->io_limits_enabled
&& throttle_enabled(&cfg
)) {
1804 bdrv_io_limits_enable(bs
);
1805 } else if (bs
->io_limits_enabled
&& !throttle_enabled(&cfg
)) {
1806 bdrv_io_limits_disable(bs
);
1809 if (bs
->io_limits_enabled
) {
1810 bdrv_set_io_limits(bs
, &cfg
);
1813 aio_context_release(aio_context
);
1816 int do_drive_del(Monitor
*mon
, const QDict
*qdict
, QObject
**ret_data
)
1818 const char *id
= qdict_get_str(qdict
, "id");
1820 BlockDriverState
*bs
;
1822 AioContext
*aio_context
;
1823 Error
*local_err
= NULL
;
1825 blk
= blk_by_name(id
);
1827 error_report("Device '%s' not found", id
);
1832 dinfo
= blk_legacy_dinfo(blk
);
1833 if (dinfo
&& !dinfo
->enable_auto_del
) {
1834 error_report("Deleting device added with blockdev-add"
1835 " is not supported");
1839 aio_context
= bdrv_get_aio_context(bs
);
1840 aio_context_acquire(aio_context
);
1842 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_DRIVE_DEL
, &local_err
)) {
1843 error_report("%s", error_get_pretty(local_err
));
1844 error_free(local_err
);
1845 aio_context_release(aio_context
);
1849 /* quiesce block driver; prevent further io */
1854 /* if we have a device attached to this BlockDriverState
1855 * then we need to make the drive anonymous until the device
1856 * can be removed. If this is a drive with no device backing
1857 * then we can just get rid of the block driver state right here.
1859 if (bdrv_get_attached_dev(bs
)) {
1860 blk_hide_on_behalf_of_do_drive_del(blk
);
1861 /* Further I/O must not pause the guest */
1862 bdrv_set_on_error(bs
, BLOCKDEV_ON_ERROR_REPORT
,
1863 BLOCKDEV_ON_ERROR_REPORT
);
1868 aio_context_release(aio_context
);
1872 void qmp_block_resize(bool has_device
, const char *device
,
1873 bool has_node_name
, const char *node_name
,
1874 int64_t size
, Error
**errp
)
1876 Error
*local_err
= NULL
;
1877 BlockDriverState
*bs
;
1878 AioContext
*aio_context
;
1881 bs
= bdrv_lookup_bs(has_device
? device
: NULL
,
1882 has_node_name
? node_name
: NULL
,
1885 error_propagate(errp
, local_err
);
1889 aio_context
= bdrv_get_aio_context(bs
);
1890 aio_context_acquire(aio_context
);
1892 if (!bdrv_is_first_non_filter(bs
)) {
1893 error_set(errp
, QERR_FEATURE_DISABLED
, "resize");
1898 error_set(errp
, QERR_INVALID_PARAMETER_VALUE
, "size", "a >0 size");
1902 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_RESIZE
, NULL
)) {
1903 error_set(errp
, QERR_DEVICE_IN_USE
, device
);
1907 /* complete all in-flight operations before resizing the device */
1910 ret
= bdrv_truncate(bs
, size
);
1915 error_set(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
1918 error_set(errp
, QERR_UNSUPPORTED
);
1921 error_set(errp
, QERR_DEVICE_IS_READ_ONLY
, device
);
1924 error_set(errp
, QERR_DEVICE_IN_USE
, device
);
1927 error_setg_errno(errp
, -ret
, "Could not resize");
1932 aio_context_release(aio_context
);
1935 static void block_job_cb(void *opaque
, int ret
)
1937 BlockDriverState
*bs
= opaque
;
1938 const char *msg
= NULL
;
1940 trace_block_job_cb(bs
, bs
->job
, ret
);
1945 msg
= strerror(-ret
);
1948 if (block_job_is_cancelled(bs
->job
)) {
1949 block_job_event_cancelled(bs
->job
);
1951 block_job_event_completed(bs
->job
, msg
);
1954 bdrv_put_ref_bh_schedule(bs
);
1957 void qmp_block_stream(const char *device
,
1958 bool has_base
, const char *base
,
1959 bool has_backing_file
, const char *backing_file
,
1960 bool has_speed
, int64_t speed
,
1961 bool has_on_error
, BlockdevOnError on_error
,
1964 BlockDriverState
*bs
;
1965 BlockDriverState
*base_bs
= NULL
;
1966 Error
*local_err
= NULL
;
1967 const char *base_name
= NULL
;
1969 if (!has_on_error
) {
1970 on_error
= BLOCKDEV_ON_ERROR_REPORT
;
1973 bs
= bdrv_find(device
);
1975 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
1979 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_STREAM
, errp
)) {
1984 base_bs
= bdrv_find_backing_image(bs
, base
);
1985 if (base_bs
== NULL
) {
1986 error_set(errp
, QERR_BASE_NOT_FOUND
, base
);
1992 /* if we are streaming the entire chain, the result will have no backing
1993 * file, and specifying one is therefore an error */
1994 if (base_bs
== NULL
&& has_backing_file
) {
1995 error_setg(errp
, "backing file specified, but streaming the "
2000 /* backing_file string overrides base bs filename */
2001 base_name
= has_backing_file
? backing_file
: base_name
;
2003 stream_start(bs
, base_bs
, base_name
, has_speed
? speed
: 0,
2004 on_error
, block_job_cb
, bs
, &local_err
);
2006 error_propagate(errp
, local_err
);
2010 trace_qmp_block_stream(bs
, bs
->job
);
2013 void qmp_block_commit(const char *device
,
2014 bool has_base
, const char *base
,
2015 bool has_top
, const char *top
,
2016 bool has_backing_file
, const char *backing_file
,
2017 bool has_speed
, int64_t speed
,
2020 BlockDriverState
*bs
;
2021 BlockDriverState
*base_bs
, *top_bs
;
2022 Error
*local_err
= NULL
;
2023 /* This will be part of the QMP command, if/when the
2024 * BlockdevOnError change for blkmirror makes it in
2026 BlockdevOnError on_error
= BLOCKDEV_ON_ERROR_REPORT
;
2032 /* drain all i/o before commits */
2036 * libvirt relies on the DeviceNotFound error class in order to probe for
2037 * live commit feature versions; for this to work, we must make sure to
2038 * perform the device lookup before any generic errors that may occur in a
2039 * scenario in which all optional arguments are omitted. */
2040 bs
= bdrv_find(device
);
2042 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
2046 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_COMMIT
, errp
)) {
2050 /* default top_bs is the active layer */
2053 if (has_top
&& top
) {
2054 if (strcmp(bs
->filename
, top
) != 0) {
2055 top_bs
= bdrv_find_backing_image(bs
, top
);
2059 if (top_bs
== NULL
) {
2060 error_setg(errp
, "Top image file %s not found", top
? top
: "NULL");
2064 if (has_base
&& base
) {
2065 base_bs
= bdrv_find_backing_image(top_bs
, base
);
2067 base_bs
= bdrv_find_base(top_bs
);
2070 if (base_bs
== NULL
) {
2071 error_set(errp
, QERR_BASE_NOT_FOUND
, base
? base
: "NULL");
2075 /* Do not allow attempts to commit an image into itself */
2076 if (top_bs
== base_bs
) {
2077 error_setg(errp
, "cannot commit an image into itself");
2082 if (has_backing_file
) {
2083 error_setg(errp
, "'backing-file' specified,"
2084 " but 'top' is the active layer");
2087 commit_active_start(bs
, base_bs
, speed
, on_error
, block_job_cb
,
2090 commit_start(bs
, base_bs
, top_bs
, speed
, on_error
, block_job_cb
, bs
,
2091 has_backing_file
? backing_file
: NULL
, &local_err
);
2093 if (local_err
!= NULL
) {
2094 error_propagate(errp
, local_err
);
2099 void qmp_drive_backup(const char *device
, const char *target
,
2100 bool has_format
, const char *format
,
2101 enum MirrorSyncMode sync
,
2102 bool has_mode
, enum NewImageMode mode
,
2103 bool has_speed
, int64_t speed
,
2104 bool has_on_source_error
, BlockdevOnError on_source_error
,
2105 bool has_on_target_error
, BlockdevOnError on_target_error
,
2108 BlockDriverState
*bs
;
2109 BlockDriverState
*target_bs
;
2110 BlockDriverState
*source
= NULL
;
2111 BlockDriver
*drv
= NULL
;
2112 Error
*local_err
= NULL
;
2120 if (!has_on_source_error
) {
2121 on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
2123 if (!has_on_target_error
) {
2124 on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
2127 mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
2130 bs
= bdrv_find(device
);
2132 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
2136 if (!bdrv_is_inserted(bs
)) {
2137 error_set(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
2142 format
= mode
== NEW_IMAGE_MODE_EXISTING
? NULL
: bs
->drv
->format_name
;
2145 drv
= bdrv_find_format(format
);
2147 error_set(errp
, QERR_INVALID_BLOCK_FORMAT
, format
);
2152 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_BACKUP_SOURCE
, errp
)) {
2156 flags
= bs
->open_flags
| BDRV_O_RDWR
;
2158 /* See if we have a backing HD we can use to create our new image
2160 if (sync
== MIRROR_SYNC_MODE_TOP
) {
2161 source
= bs
->backing_hd
;
2163 sync
= MIRROR_SYNC_MODE_FULL
;
2166 if (sync
== MIRROR_SYNC_MODE_NONE
) {
2170 size
= bdrv_getlength(bs
);
2172 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
2176 if (mode
!= NEW_IMAGE_MODE_EXISTING
) {
2177 assert(format
&& drv
);
2179 bdrv_img_create(target
, format
, source
->filename
,
2180 source
->drv
->format_name
, NULL
,
2181 size
, flags
, &local_err
, false);
2183 bdrv_img_create(target
, format
, NULL
, NULL
, NULL
,
2184 size
, flags
, &local_err
, false);
2189 error_propagate(errp
, local_err
);
2194 ret
= bdrv_open(&target_bs
, target
, NULL
, NULL
, flags
, drv
, &local_err
);
2196 error_propagate(errp
, local_err
);
2200 backup_start(bs
, target_bs
, speed
, sync
, on_source_error
, on_target_error
,
2201 block_job_cb
, bs
, &local_err
);
2202 if (local_err
!= NULL
) {
2203 bdrv_unref(target_bs
);
2204 error_propagate(errp
, local_err
);
2209 BlockDeviceInfoList
*qmp_query_named_block_nodes(Error
**errp
)
2211 return bdrv_named_nodes_list();
2214 #define DEFAULT_MIRROR_BUF_SIZE (10 << 20)
2216 void qmp_drive_mirror(const char *device
, const char *target
,
2217 bool has_format
, const char *format
,
2218 bool has_node_name
, const char *node_name
,
2219 bool has_replaces
, const char *replaces
,
2220 enum MirrorSyncMode sync
,
2221 bool has_mode
, enum NewImageMode mode
,
2222 bool has_speed
, int64_t speed
,
2223 bool has_granularity
, uint32_t granularity
,
2224 bool has_buf_size
, int64_t buf_size
,
2225 bool has_on_source_error
, BlockdevOnError on_source_error
,
2226 bool has_on_target_error
, BlockdevOnError on_target_error
,
2229 BlockDriverState
*bs
;
2230 BlockDriverState
*source
, *target_bs
;
2231 BlockDriver
*drv
= NULL
;
2232 Error
*local_err
= NULL
;
2233 QDict
*options
= NULL
;
2241 if (!has_on_source_error
) {
2242 on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
2244 if (!has_on_target_error
) {
2245 on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
2248 mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
2250 if (!has_granularity
) {
2253 if (!has_buf_size
) {
2254 buf_size
= DEFAULT_MIRROR_BUF_SIZE
;
2257 if (granularity
!= 0 && (granularity
< 512 || granularity
> 1048576 * 64)) {
2258 error_set(errp
, QERR_INVALID_PARAMETER_VALUE
, "granularity",
2259 "a value in range [512B, 64MB]");
2262 if (granularity
& (granularity
- 1)) {
2263 error_set(errp
, QERR_INVALID_PARAMETER_VALUE
, "granularity", "power of 2");
2267 bs
= bdrv_find(device
);
2269 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
2273 if (!bdrv_is_inserted(bs
)) {
2274 error_set(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
2279 format
= mode
== NEW_IMAGE_MODE_EXISTING
? NULL
: bs
->drv
->format_name
;
2282 drv
= bdrv_find_format(format
);
2284 error_set(errp
, QERR_INVALID_BLOCK_FORMAT
, format
);
2289 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_MIRROR
, errp
)) {
2293 flags
= bs
->open_flags
| BDRV_O_RDWR
;
2294 source
= bs
->backing_hd
;
2295 if (!source
&& sync
== MIRROR_SYNC_MODE_TOP
) {
2296 sync
= MIRROR_SYNC_MODE_FULL
;
2298 if (sync
== MIRROR_SYNC_MODE_NONE
) {
2302 size
= bdrv_getlength(bs
);
2304 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
2309 BlockDriverState
*to_replace_bs
;
2311 if (!has_node_name
) {
2312 error_setg(errp
, "a node-name must be provided when replacing a"
2313 " named node of the graph");
2317 to_replace_bs
= check_to_replace_node(replaces
, &local_err
);
2319 if (!to_replace_bs
) {
2320 error_propagate(errp
, local_err
);
2324 if (size
!= bdrv_getlength(to_replace_bs
)) {
2325 error_setg(errp
, "cannot replace image with a mirror image of "
2331 if ((sync
== MIRROR_SYNC_MODE_FULL
|| !source
)
2332 && mode
!= NEW_IMAGE_MODE_EXISTING
)
2334 /* create new image w/o backing file */
2335 assert(format
&& drv
);
2336 bdrv_img_create(target
, format
,
2337 NULL
, NULL
, NULL
, size
, flags
, &local_err
, false);
2340 case NEW_IMAGE_MODE_EXISTING
:
2342 case NEW_IMAGE_MODE_ABSOLUTE_PATHS
:
2343 /* create new image with backing file */
2344 bdrv_img_create(target
, format
,
2346 source
->drv
->format_name
,
2347 NULL
, size
, flags
, &local_err
, false);
2355 error_propagate(errp
, local_err
);
2359 if (has_node_name
) {
2360 options
= qdict_new();
2361 qdict_put(options
, "node-name", qstring_from_str(node_name
));
2364 /* Mirroring takes care of copy-on-write using the source's backing
2368 ret
= bdrv_open(&target_bs
, target
, NULL
, options
,
2369 flags
| BDRV_O_NO_BACKING
, drv
, &local_err
);
2371 error_propagate(errp
, local_err
);
2375 /* pass the node name to replace to mirror start since it's loose coupling
2376 * and will allow to check whether the node still exist at mirror completion
2378 mirror_start(bs
, target_bs
,
2379 has_replaces
? replaces
: NULL
,
2380 speed
, granularity
, buf_size
, sync
,
2381 on_source_error
, on_target_error
,
2382 block_job_cb
, bs
, &local_err
);
2383 if (local_err
!= NULL
) {
2384 bdrv_unref(target_bs
);
2385 error_propagate(errp
, local_err
);
2390 static BlockJob
*find_block_job(const char *device
)
2392 BlockDriverState
*bs
;
2394 bs
= bdrv_find(device
);
2395 if (!bs
|| !bs
->job
) {
2401 void qmp_block_job_set_speed(const char *device
, int64_t speed
, Error
**errp
)
2403 BlockJob
*job
= find_block_job(device
);
2406 error_set(errp
, QERR_BLOCK_JOB_NOT_ACTIVE
, device
);
2410 block_job_set_speed(job
, speed
, errp
);
2413 void qmp_block_job_cancel(const char *device
,
2414 bool has_force
, bool force
, Error
**errp
)
2416 BlockJob
*job
= find_block_job(device
);
2423 error_set(errp
, QERR_BLOCK_JOB_NOT_ACTIVE
, device
);
2426 if (job
->paused
&& !force
) {
2427 error_setg(errp
, "The block job for device '%s' is currently paused",
2432 trace_qmp_block_job_cancel(job
);
2433 block_job_cancel(job
);
2436 void qmp_block_job_pause(const char *device
, Error
**errp
)
2438 BlockJob
*job
= find_block_job(device
);
2441 error_set(errp
, QERR_BLOCK_JOB_NOT_ACTIVE
, device
);
2445 trace_qmp_block_job_pause(job
);
2446 block_job_pause(job
);
2449 void qmp_block_job_resume(const char *device
, Error
**errp
)
2451 BlockJob
*job
= find_block_job(device
);
2454 error_set(errp
, QERR_BLOCK_JOB_NOT_ACTIVE
, device
);
2458 trace_qmp_block_job_resume(job
);
2459 block_job_resume(job
);
2462 void qmp_block_job_complete(const char *device
, Error
**errp
)
2464 BlockJob
*job
= find_block_job(device
);
2467 error_set(errp
, QERR_BLOCK_JOB_NOT_ACTIVE
, device
);
2471 trace_qmp_block_job_complete(job
);
2472 block_job_complete(job
, errp
);
2475 void qmp_change_backing_file(const char *device
,
2476 const char *image_node_name
,
2477 const char *backing_file
,
2480 BlockDriverState
*bs
= NULL
;
2481 BlockDriverState
*image_bs
= NULL
;
2482 Error
*local_err
= NULL
;
2487 /* find the top layer BDS of the chain */
2488 bs
= bdrv_find(device
);
2490 error_set(errp
, QERR_DEVICE_NOT_FOUND
, device
);
2494 image_bs
= bdrv_lookup_bs(NULL
, image_node_name
, &local_err
);
2496 error_propagate(errp
, local_err
);
2501 error_setg(errp
, "image file not found");
2505 if (bdrv_find_base(image_bs
) == image_bs
) {
2506 error_setg(errp
, "not allowing backing file change on an image "
2507 "without a backing file");
2511 /* even though we are not necessarily operating on bs, we need it to
2512 * determine if block ops are currently prohibited on the chain */
2513 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_CHANGE
, errp
)) {
2517 /* final sanity check */
2518 if (!bdrv_chain_contains(bs
, image_bs
)) {
2519 error_setg(errp
, "'%s' and image file are not in the same chain",
2524 /* if not r/w, reopen to make r/w */
2525 open_flags
= image_bs
->open_flags
;
2526 ro
= bdrv_is_read_only(image_bs
);
2529 bdrv_reopen(image_bs
, open_flags
| BDRV_O_RDWR
, &local_err
);
2531 error_propagate(errp
, local_err
);
2536 ret
= bdrv_change_backing_file(image_bs
, backing_file
,
2537 image_bs
->drv
? image_bs
->drv
->format_name
: "");
2540 error_setg_errno(errp
, -ret
, "Could not change backing file to '%s'",
2542 /* don't exit here, so we can try to restore open flags if
2547 bdrv_reopen(image_bs
, open_flags
, &local_err
);
2549 error_propagate(errp
, local_err
); /* will preserve prior errp */
2554 void qmp_blockdev_add(BlockdevOptions
*options
, Error
**errp
)
2556 QmpOutputVisitor
*ov
= qmp_output_visitor_new();
2560 Error
*local_err
= NULL
;
2562 /* Require an ID in the top level */
2563 if (!options
->has_id
) {
2564 error_setg(errp
, "Block device needs an ID");
2568 /* TODO Sort it out in raw-posix and drive_new(): Reject aio=native with
2569 * cache.direct=false instead of silently switching to aio=threads, except
2570 * when called from drive_new().
2572 * For now, simply forbidding the combination for all drivers will do. */
2573 if (options
->has_aio
&& options
->aio
== BLOCKDEV_AIO_OPTIONS_NATIVE
) {
2574 bool direct
= options
->has_cache
&&
2575 options
->cache
->has_direct
&&
2576 options
->cache
->direct
;
2578 error_setg(errp
, "aio=native requires cache.direct=true");
2583 visit_type_BlockdevOptions(qmp_output_get_visitor(ov
),
2584 &options
, NULL
, &local_err
);
2586 error_propagate(errp
, local_err
);
2590 obj
= qmp_output_get_qobject(ov
);
2591 qdict
= qobject_to_qdict(obj
);
2593 qdict_flatten(qdict
);
2595 blk
= blockdev_init(NULL
, qdict
, &local_err
);
2597 error_propagate(errp
, local_err
);
2601 if (bdrv_key_required(blk_bs(blk
))) {
2603 error_setg(errp
, "blockdev-add doesn't support encrypted devices");
2608 qmp_output_visitor_cleanup(ov
);
2611 BlockJobInfoList
*qmp_query_block_jobs(Error
**errp
)
2613 BlockJobInfoList
*head
= NULL
, **p_next
= &head
;
2614 BlockDriverState
*bs
;
2616 for (bs
= bdrv_next(NULL
); bs
; bs
= bdrv_next(bs
)) {
2618 BlockJobInfoList
*elem
= g_new0(BlockJobInfoList
, 1);
2619 elem
->value
= block_job_query(bs
->job
);
2621 p_next
= &elem
->next
;
2628 QemuOptsList qemu_common_drive_opts
= {
2630 .head
= QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts
.head
),
2634 .type
= QEMU_OPT_BOOL
,
2635 .help
= "enable/disable snapshot mode",
2638 .type
= QEMU_OPT_STRING
,
2639 .help
= "discard operation (ignore/off, unmap/on)",
2641 .name
= "cache.writeback",
2642 .type
= QEMU_OPT_BOOL
,
2643 .help
= "enables writeback mode for any caches",
2645 .name
= "cache.direct",
2646 .type
= QEMU_OPT_BOOL
,
2647 .help
= "enables use of O_DIRECT (bypass the host page cache)",
2649 .name
= "cache.no-flush",
2650 .type
= QEMU_OPT_BOOL
,
2651 .help
= "ignore any flush requests for the device",
2654 .type
= QEMU_OPT_STRING
,
2655 .help
= "host AIO implementation (threads, native)",
2658 .type
= QEMU_OPT_STRING
,
2659 .help
= "disk format (raw, qcow2, ...)",
2662 .type
= QEMU_OPT_STRING
,
2663 .help
= "read error action",
2666 .type
= QEMU_OPT_STRING
,
2667 .help
= "write error action",
2669 .name
= "read-only",
2670 .type
= QEMU_OPT_BOOL
,
2671 .help
= "open drive file as read-only",
2673 .name
= "throttling.iops-total",
2674 .type
= QEMU_OPT_NUMBER
,
2675 .help
= "limit total I/O operations per second",
2677 .name
= "throttling.iops-read",
2678 .type
= QEMU_OPT_NUMBER
,
2679 .help
= "limit read operations per second",
2681 .name
= "throttling.iops-write",
2682 .type
= QEMU_OPT_NUMBER
,
2683 .help
= "limit write operations per second",
2685 .name
= "throttling.bps-total",
2686 .type
= QEMU_OPT_NUMBER
,
2687 .help
= "limit total bytes per second",
2689 .name
= "throttling.bps-read",
2690 .type
= QEMU_OPT_NUMBER
,
2691 .help
= "limit read bytes per second",
2693 .name
= "throttling.bps-write",
2694 .type
= QEMU_OPT_NUMBER
,
2695 .help
= "limit write bytes per second",
2697 .name
= "throttling.iops-total-max",
2698 .type
= QEMU_OPT_NUMBER
,
2699 .help
= "I/O operations burst",
2701 .name
= "throttling.iops-read-max",
2702 .type
= QEMU_OPT_NUMBER
,
2703 .help
= "I/O operations read burst",
2705 .name
= "throttling.iops-write-max",
2706 .type
= QEMU_OPT_NUMBER
,
2707 .help
= "I/O operations write burst",
2709 .name
= "throttling.bps-total-max",
2710 .type
= QEMU_OPT_NUMBER
,
2711 .help
= "total bytes burst",
2713 .name
= "throttling.bps-read-max",
2714 .type
= QEMU_OPT_NUMBER
,
2715 .help
= "total bytes read burst",
2717 .name
= "throttling.bps-write-max",
2718 .type
= QEMU_OPT_NUMBER
,
2719 .help
= "total bytes write burst",
2721 .name
= "throttling.iops-size",
2722 .type
= QEMU_OPT_NUMBER
,
2723 .help
= "when limiting by iops max size of an I/O in bytes",
2725 .name
= "copy-on-read",
2726 .type
= QEMU_OPT_BOOL
,
2727 .help
= "copy read data from backing file into image file",
2729 .name
= "detect-zeroes",
2730 .type
= QEMU_OPT_STRING
,
2731 .help
= "try to optimize zero writes (off, on, unmap)",
2733 { /* end of list */ }
2737 QemuOptsList qemu_drive_opts
= {
2739 .head
= QTAILQ_HEAD_INITIALIZER(qemu_drive_opts
.head
),
2742 * no elements => accept any params
2743 * validation will happen later
2745 { /* end of list */ }