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 "qemu/osdep.h"
34 #include "sysemu/block-backend.h"
35 #include "sysemu/blockdev.h"
36 #include "hw/block/block.h"
37 #include "block/blockjob.h"
38 #include "block/throttle-groups.h"
39 #include "monitor/monitor.h"
40 #include "qemu/error-report.h"
41 #include "qemu/option.h"
42 #include "qemu/config-file.h"
43 #include "qapi/qmp/types.h"
44 #include "qapi-visit.h"
45 #include "qapi/qmp/qerror.h"
46 #include "qapi/qmp-output-visitor.h"
47 #include "qapi/util.h"
48 #include "sysemu/sysemu.h"
49 #include "block/block_int.h"
50 #include "qmp-commands.h"
52 #include "sysemu/arch_init.h"
53 #include "qemu/cutils.h"
54 #include "qemu/help_option.h"
56 static QTAILQ_HEAD(, BlockDriverState
) monitor_bdrv_states
=
57 QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states
);
59 static int do_open_tray(const char *blk_name
, const char *qdev_id
,
60 bool force
, Error
**errp
);
62 static const char *const if_name
[IF_COUNT
] = {
66 [IF_FLOPPY
] = "floppy",
67 [IF_PFLASH
] = "pflash",
70 [IF_VIRTIO
] = "virtio",
74 static int if_max_devs
[IF_COUNT
] = {
76 * Do not change these numbers! They govern how drive option
77 * index maps to unit and bus. That mapping is ABI.
79 * All controllers used to implement if=T drives need to support
80 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
81 * Otherwise, some index values map to "impossible" bus, unit
84 * For instance, if you change [IF_SCSI] to 255, -drive
85 * if=scsi,index=12 no longer means bus=1,unit=5, but
86 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
87 * the drive can't be set up. Regression.
94 * Boards may call this to offer board-by-board overrides
95 * of the default, global values.
97 void override_max_devs(BlockInterfaceType type
, int max_devs
)
106 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
107 dinfo
= blk_legacy_dinfo(blk
);
108 if (dinfo
->type
== type
) {
109 fprintf(stderr
, "Cannot override units-per-bus property of"
110 " the %s interface, because a drive of that type has"
111 " already been added.\n", if_name
[type
]);
112 g_assert_not_reached();
116 if_max_devs
[type
] = max_devs
;
120 * We automatically delete the drive when a device using it gets
121 * unplugged. Questionable feature, but we can't just drop it.
122 * Device models call blockdev_mark_auto_del() to schedule the
123 * automatic deletion, and generic qdev code calls blockdev_auto_del()
124 * when deletion is actually safe.
126 void blockdev_mark_auto_del(BlockBackend
*blk
)
128 DriveInfo
*dinfo
= blk_legacy_dinfo(blk
);
129 BlockDriverState
*bs
= blk_bs(blk
);
130 AioContext
*aio_context
;
137 aio_context
= bdrv_get_aio_context(bs
);
138 aio_context_acquire(aio_context
);
141 block_job_cancel(bs
->job
);
144 aio_context_release(aio_context
);
150 void blockdev_auto_del(BlockBackend
*blk
)
152 DriveInfo
*dinfo
= blk_legacy_dinfo(blk
);
154 if (dinfo
&& dinfo
->auto_del
) {
155 monitor_remove_blk(blk
);
161 * Returns the current mapping of how many units per bus
162 * a particular interface can support.
164 * A positive integer indicates n units per bus.
165 * 0 implies the mapping has not been established.
166 * -1 indicates an invalid BlockInterfaceType was given.
168 int drive_get_max_devs(BlockInterfaceType type
)
170 if (type
>= IF_IDE
&& type
< IF_COUNT
) {
171 return if_max_devs
[type
];
177 static int drive_index_to_bus_id(BlockInterfaceType type
, int index
)
179 int max_devs
= if_max_devs
[type
];
180 return max_devs
? index
/ max_devs
: 0;
183 static int drive_index_to_unit_id(BlockInterfaceType type
, int index
)
185 int max_devs
= if_max_devs
[type
];
186 return max_devs
? index
% max_devs
: index
;
189 QemuOpts
*drive_def(const char *optstr
)
191 return qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr
, false);
194 QemuOpts
*drive_add(BlockInterfaceType type
, int index
, const char *file
,
199 opts
= drive_def(optstr
);
203 if (type
!= IF_DEFAULT
) {
204 qemu_opt_set(opts
, "if", if_name
[type
], &error_abort
);
207 qemu_opt_set_number(opts
, "index", index
, &error_abort
);
210 qemu_opt_set(opts
, "file", file
, &error_abort
);
214 DriveInfo
*drive_get(BlockInterfaceType type
, int bus
, int unit
)
219 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
220 dinfo
= blk_legacy_dinfo(blk
);
221 if (dinfo
&& dinfo
->type
== type
222 && dinfo
->bus
== bus
&& dinfo
->unit
== unit
) {
230 bool drive_check_orphaned(void)
236 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
237 dinfo
= blk_legacy_dinfo(blk
);
238 /* If dinfo->bdrv->dev is NULL, it has no device attached. */
239 /* Unless this is a default drive, this may be an oversight. */
240 if (!blk_get_attached_dev(blk
) && !dinfo
->is_default
&&
241 dinfo
->type
!= IF_NONE
) {
242 fprintf(stderr
, "Warning: Orphaned drive without device: "
243 "id=%s,file=%s,if=%s,bus=%d,unit=%d\n",
244 blk_name(blk
), blk_bs(blk
) ? blk_bs(blk
)->filename
: "",
245 if_name
[dinfo
->type
], dinfo
->bus
, dinfo
->unit
);
253 DriveInfo
*drive_get_by_index(BlockInterfaceType type
, int index
)
255 return drive_get(type
,
256 drive_index_to_bus_id(type
, index
),
257 drive_index_to_unit_id(type
, index
));
260 int drive_get_max_bus(BlockInterfaceType type
)
267 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
268 dinfo
= blk_legacy_dinfo(blk
);
269 if (dinfo
&& dinfo
->type
== type
&& dinfo
->bus
> max_bus
) {
270 max_bus
= dinfo
->bus
;
276 /* Get a block device. This should only be used for single-drive devices
277 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
279 DriveInfo
*drive_get_next(BlockInterfaceType type
)
281 static int next_block_unit
[IF_COUNT
];
283 return drive_get(type
, 0, next_block_unit
[type
]++);
286 static void bdrv_format_print(void *opaque
, const char *name
)
288 error_printf(" %s", name
);
293 BlockDriverState
*bs
;
296 static int parse_block_error_action(const char *buf
, bool is_read
, Error
**errp
)
298 if (!strcmp(buf
, "ignore")) {
299 return BLOCKDEV_ON_ERROR_IGNORE
;
300 } else if (!is_read
&& !strcmp(buf
, "enospc")) {
301 return BLOCKDEV_ON_ERROR_ENOSPC
;
302 } else if (!strcmp(buf
, "stop")) {
303 return BLOCKDEV_ON_ERROR_STOP
;
304 } else if (!strcmp(buf
, "report")) {
305 return BLOCKDEV_ON_ERROR_REPORT
;
307 error_setg(errp
, "'%s' invalid %s error action",
308 buf
, is_read
? "read" : "write");
313 static bool parse_stats_intervals(BlockAcctStats
*stats
, QList
*intervals
,
316 const QListEntry
*entry
;
317 for (entry
= qlist_first(intervals
); entry
; entry
= qlist_next(entry
)) {
318 switch (qobject_type(entry
->value
)) {
320 case QTYPE_QSTRING
: {
321 unsigned long long length
;
322 const char *str
= qstring_get_str(qobject_to_qstring(entry
->value
));
323 if (parse_uint_full(str
, &length
, 10) == 0 &&
324 length
> 0 && length
<= UINT_MAX
) {
325 block_acct_add_interval(stats
, (unsigned) length
);
327 error_setg(errp
, "Invalid interval length: %s", str
);
334 int64_t length
= qint_get_int(qobject_to_qint(entry
->value
));
335 if (length
> 0 && length
<= UINT_MAX
) {
336 block_acct_add_interval(stats
, (unsigned) length
);
338 error_setg(errp
, "Invalid interval length: %" PRId64
, length
);
345 error_setg(errp
, "The specification of stats-intervals is invalid");
352 typedef enum { MEDIA_DISK
, MEDIA_CDROM
} DriveMediaType
;
354 /* All parameters but @opts are optional and may be set to NULL. */
355 static void extract_common_blockdev_options(QemuOpts
*opts
, int *bdrv_flags
,
356 const char **throttling_group
, ThrottleConfig
*throttle_cfg
,
357 BlockdevDetectZeroesOptions
*detect_zeroes
, Error
**errp
)
360 Error
*local_error
= NULL
;
364 if (qemu_opt_get_bool(opts
, "copy-on-read", false)) {
365 *bdrv_flags
|= BDRV_O_COPY_ON_READ
;
368 if ((discard
= qemu_opt_get(opts
, "discard")) != NULL
) {
369 if (bdrv_parse_discard_flags(discard
, bdrv_flags
) != 0) {
370 error_setg(errp
, "Invalid discard option");
375 if ((aio
= qemu_opt_get(opts
, "aio")) != NULL
) {
376 if (!strcmp(aio
, "native")) {
377 *bdrv_flags
|= BDRV_O_NATIVE_AIO
;
378 } else if (!strcmp(aio
, "threads")) {
379 /* this is the default */
381 error_setg(errp
, "invalid aio option");
387 /* disk I/O throttling */
388 if (throttling_group
) {
389 *throttling_group
= qemu_opt_get(opts
, "throttling.group");
393 throttle_config_init(throttle_cfg
);
394 throttle_cfg
->buckets
[THROTTLE_BPS_TOTAL
].avg
=
395 qemu_opt_get_number(opts
, "throttling.bps-total", 0);
396 throttle_cfg
->buckets
[THROTTLE_BPS_READ
].avg
=
397 qemu_opt_get_number(opts
, "throttling.bps-read", 0);
398 throttle_cfg
->buckets
[THROTTLE_BPS_WRITE
].avg
=
399 qemu_opt_get_number(opts
, "throttling.bps-write", 0);
400 throttle_cfg
->buckets
[THROTTLE_OPS_TOTAL
].avg
=
401 qemu_opt_get_number(opts
, "throttling.iops-total", 0);
402 throttle_cfg
->buckets
[THROTTLE_OPS_READ
].avg
=
403 qemu_opt_get_number(opts
, "throttling.iops-read", 0);
404 throttle_cfg
->buckets
[THROTTLE_OPS_WRITE
].avg
=
405 qemu_opt_get_number(opts
, "throttling.iops-write", 0);
407 throttle_cfg
->buckets
[THROTTLE_BPS_TOTAL
].max
=
408 qemu_opt_get_number(opts
, "throttling.bps-total-max", 0);
409 throttle_cfg
->buckets
[THROTTLE_BPS_READ
].max
=
410 qemu_opt_get_number(opts
, "throttling.bps-read-max", 0);
411 throttle_cfg
->buckets
[THROTTLE_BPS_WRITE
].max
=
412 qemu_opt_get_number(opts
, "throttling.bps-write-max", 0);
413 throttle_cfg
->buckets
[THROTTLE_OPS_TOTAL
].max
=
414 qemu_opt_get_number(opts
, "throttling.iops-total-max", 0);
415 throttle_cfg
->buckets
[THROTTLE_OPS_READ
].max
=
416 qemu_opt_get_number(opts
, "throttling.iops-read-max", 0);
417 throttle_cfg
->buckets
[THROTTLE_OPS_WRITE
].max
=
418 qemu_opt_get_number(opts
, "throttling.iops-write-max", 0);
420 throttle_cfg
->buckets
[THROTTLE_BPS_TOTAL
].burst_length
=
421 qemu_opt_get_number(opts
, "throttling.bps-total-max-length", 1);
422 throttle_cfg
->buckets
[THROTTLE_BPS_READ
].burst_length
=
423 qemu_opt_get_number(opts
, "throttling.bps-read-max-length", 1);
424 throttle_cfg
->buckets
[THROTTLE_BPS_WRITE
].burst_length
=
425 qemu_opt_get_number(opts
, "throttling.bps-write-max-length", 1);
426 throttle_cfg
->buckets
[THROTTLE_OPS_TOTAL
].burst_length
=
427 qemu_opt_get_number(opts
, "throttling.iops-total-max-length", 1);
428 throttle_cfg
->buckets
[THROTTLE_OPS_READ
].burst_length
=
429 qemu_opt_get_number(opts
, "throttling.iops-read-max-length", 1);
430 throttle_cfg
->buckets
[THROTTLE_OPS_WRITE
].burst_length
=
431 qemu_opt_get_number(opts
, "throttling.iops-write-max-length", 1);
433 throttle_cfg
->op_size
=
434 qemu_opt_get_number(opts
, "throttling.iops-size", 0);
436 if (!throttle_is_valid(throttle_cfg
, errp
)) {
443 qapi_enum_parse(BlockdevDetectZeroesOptions_lookup
,
444 qemu_opt_get(opts
, "detect-zeroes"),
445 BLOCKDEV_DETECT_ZEROES_OPTIONS__MAX
,
446 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF
,
449 error_propagate(errp
, local_error
);
454 *detect_zeroes
== BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP
&&
455 !(*bdrv_flags
& BDRV_O_UNMAP
))
457 error_setg(errp
, "setting detect-zeroes to unmap is not allowed "
458 "without setting discard operation to unmap");
464 /* Takes the ownership of bs_opts */
465 static BlockBackend
*blockdev_init(const char *file
, QDict
*bs_opts
,
470 int on_read_error
, on_write_error
;
471 bool account_invalid
, account_failed
;
472 bool writethrough
, read_only
;
474 BlockDriverState
*bs
;
479 QDict
*interval_dict
= NULL
;
480 QList
*interval_list
= NULL
;
482 BlockdevDetectZeroesOptions detect_zeroes
=
483 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF
;
484 const char *throttling_group
= NULL
;
486 /* Check common options by copying from bs_opts to opts, all other options
487 * stay in bs_opts for processing by bdrv_open(). */
488 id
= qdict_get_try_str(bs_opts
, "id");
489 opts
= qemu_opts_create(&qemu_common_drive_opts
, id
, 1, &error
);
491 error_propagate(errp
, error
);
495 qemu_opts_absorb_qdict(opts
, bs_opts
, &error
);
497 error_propagate(errp
, error
);
502 qdict_del(bs_opts
, "id");
505 /* extract parameters */
506 snapshot
= qemu_opt_get_bool(opts
, "snapshot", 0);
508 account_invalid
= qemu_opt_get_bool(opts
, "stats-account-invalid", true);
509 account_failed
= qemu_opt_get_bool(opts
, "stats-account-failed", true);
511 writethrough
= !qemu_opt_get_bool(opts
, BDRV_OPT_CACHE_WB
, true);
513 id
= qemu_opts_id(opts
);
515 qdict_extract_subqdict(bs_opts
, &interval_dict
, "stats-intervals.");
516 qdict_array_split(interval_dict
, &interval_list
);
518 if (qdict_size(interval_dict
) != 0) {
519 error_setg(errp
, "Invalid option stats-intervals.%s",
520 qdict_first(interval_dict
)->key
);
524 extract_common_blockdev_options(opts
, &bdrv_flags
, &throttling_group
, &cfg
,
525 &detect_zeroes
, &error
);
527 error_propagate(errp
, error
);
531 if ((buf
= qemu_opt_get(opts
, "format")) != NULL
) {
532 if (is_help_option(buf
)) {
533 error_printf("Supported formats:");
534 bdrv_iterate_format(bdrv_format_print
, NULL
);
539 if (qdict_haskey(bs_opts
, "driver")) {
540 error_setg(errp
, "Cannot specify both 'driver' and 'format'");
543 qdict_put(bs_opts
, "driver", qstring_from_str(buf
));
546 on_write_error
= BLOCKDEV_ON_ERROR_ENOSPC
;
547 if ((buf
= qemu_opt_get(opts
, "werror")) != NULL
) {
548 on_write_error
= parse_block_error_action(buf
, 0, &error
);
550 error_propagate(errp
, error
);
555 on_read_error
= BLOCKDEV_ON_ERROR_REPORT
;
556 if ((buf
= qemu_opt_get(opts
, "rerror")) != NULL
) {
557 on_read_error
= parse_block_error_action(buf
, 1, &error
);
559 error_propagate(errp
, error
);
565 bdrv_flags
|= BDRV_O_SNAPSHOT
;
568 read_only
= qemu_opt_get_bool(opts
, BDRV_OPT_READ_ONLY
, false);
571 if ((!file
|| !*file
) && !qdict_size(bs_opts
)) {
572 BlockBackendRootState
*blk_rs
;
575 blk_rs
= blk_get_root_state(blk
);
576 blk_rs
->open_flags
= bdrv_flags
;
577 blk_rs
->read_only
= read_only
;
578 blk_rs
->detect_zeroes
= detect_zeroes
;
582 if (file
&& !*file
) {
586 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
587 * with other callers) rather than what we want as the real defaults.
588 * Apply the defaults here instead. */
589 qdict_set_default_str(bs_opts
, BDRV_OPT_CACHE_DIRECT
, "off");
590 qdict_set_default_str(bs_opts
, BDRV_OPT_CACHE_NO_FLUSH
, "off");
591 qdict_set_default_str(bs_opts
, BDRV_OPT_READ_ONLY
,
592 read_only
? "on" : "off");
593 assert((bdrv_flags
& BDRV_O_CACHE_MASK
) == 0);
595 if (runstate_check(RUN_STATE_INMIGRATE
)) {
596 bdrv_flags
|= BDRV_O_INACTIVE
;
599 blk
= blk_new_open(file
, NULL
, bs_opts
, bdrv_flags
, errp
);
605 bs
->detect_zeroes
= detect_zeroes
;
607 if (bdrv_key_required(bs
)) {
611 block_acct_init(blk_get_stats(blk
), account_invalid
, account_failed
);
613 if (!parse_stats_intervals(blk_get_stats(blk
), interval_list
, errp
)) {
620 /* disk I/O throttling */
621 if (throttle_enabled(&cfg
)) {
622 if (!throttling_group
) {
623 throttling_group
= id
;
625 blk_io_limits_enable(blk
, throttling_group
);
626 blk_set_io_limits(blk
, &cfg
);
629 blk_set_enable_write_cache(blk
, !writethrough
);
630 blk_set_on_error(blk
, on_read_error
, on_write_error
);
632 if (!monitor_add_blk(blk
, id
, errp
)) {
640 QDECREF(interval_dict
);
641 QDECREF(interval_list
);
646 QDECREF(interval_dict
);
647 QDECREF(interval_list
);
653 static QemuOptsList qemu_root_bds_opts
;
655 /* Takes the ownership of bs_opts */
656 static BlockDriverState
*bds_tree_init(QDict
*bs_opts
, Error
**errp
)
658 BlockDriverState
*bs
;
660 Error
*local_error
= NULL
;
661 BlockdevDetectZeroesOptions detect_zeroes
;
664 opts
= qemu_opts_create(&qemu_root_bds_opts
, NULL
, 1, errp
);
669 qemu_opts_absorb_qdict(opts
, bs_opts
, &local_error
);
671 error_propagate(errp
, local_error
);
675 extract_common_blockdev_options(opts
, &bdrv_flags
, NULL
, NULL
,
676 &detect_zeroes
, &local_error
);
678 error_propagate(errp
, local_error
);
682 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
683 * with other callers) rather than what we want as the real defaults.
684 * Apply the defaults here instead. */
685 qdict_set_default_str(bs_opts
, BDRV_OPT_CACHE_DIRECT
, "off");
686 qdict_set_default_str(bs_opts
, BDRV_OPT_CACHE_NO_FLUSH
, "off");
687 qdict_set_default_str(bs_opts
, BDRV_OPT_READ_ONLY
, "off");
689 if (runstate_check(RUN_STATE_INMIGRATE
)) {
690 bdrv_flags
|= BDRV_O_INACTIVE
;
693 bs
= bdrv_open(NULL
, NULL
, bs_opts
, bdrv_flags
, errp
);
695 goto fail_no_bs_opts
;
698 bs
->detect_zeroes
= detect_zeroes
;
710 void blockdev_close_all_bdrv_states(void)
712 BlockDriverState
*bs
, *next_bs
;
714 QTAILQ_FOREACH_SAFE(bs
, &monitor_bdrv_states
, monitor_list
, next_bs
) {
715 AioContext
*ctx
= bdrv_get_aio_context(bs
);
717 aio_context_acquire(ctx
);
719 aio_context_release(ctx
);
723 /* Iterates over the list of monitor-owned BlockDriverStates */
724 BlockDriverState
*bdrv_next_monitor_owned(BlockDriverState
*bs
)
726 return bs
? QTAILQ_NEXT(bs
, monitor_list
)
727 : QTAILQ_FIRST(&monitor_bdrv_states
);
730 static void qemu_opt_rename(QemuOpts
*opts
, const char *from
, const char *to
,
735 value
= qemu_opt_get(opts
, from
);
737 if (qemu_opt_find(opts
, to
)) {
738 error_setg(errp
, "'%s' and its alias '%s' can't be used at the "
739 "same time", to
, from
);
744 /* rename all items in opts */
745 while ((value
= qemu_opt_get(opts
, from
))) {
746 qemu_opt_set(opts
, to
, value
, &error_abort
);
747 qemu_opt_unset(opts
, from
);
751 QemuOptsList qemu_legacy_drive_opts
= {
753 .head
= QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts
.head
),
757 .type
= QEMU_OPT_NUMBER
,
758 .help
= "bus number",
761 .type
= QEMU_OPT_NUMBER
,
762 .help
= "unit number (i.e. lun for scsi)",
765 .type
= QEMU_OPT_NUMBER
,
766 .help
= "index number",
769 .type
= QEMU_OPT_STRING
,
770 .help
= "media type (disk, cdrom)",
773 .type
= QEMU_OPT_STRING
,
774 .help
= "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
777 .type
= QEMU_OPT_NUMBER
,
778 .help
= "number of cylinders (ide disk geometry)",
781 .type
= QEMU_OPT_NUMBER
,
782 .help
= "number of heads (ide disk geometry)",
785 .type
= QEMU_OPT_NUMBER
,
786 .help
= "number of sectors (ide disk geometry)",
789 .type
= QEMU_OPT_STRING
,
790 .help
= "chs translation (auto, lba, none)",
793 .type
= QEMU_OPT_BOOL
,
794 .help
= "(deprecated, ignored)",
797 .type
= QEMU_OPT_STRING
,
798 .help
= "pci address (virtio only)",
801 .type
= QEMU_OPT_STRING
,
802 .help
= "disk serial number",
805 .type
= QEMU_OPT_STRING
,
809 /* Options that are passed on, but have special semantics with -drive */
811 .name
= BDRV_OPT_READ_ONLY
,
812 .type
= QEMU_OPT_BOOL
,
813 .help
= "open drive file as read-only",
816 .type
= QEMU_OPT_STRING
,
817 .help
= "read error action",
820 .type
= QEMU_OPT_STRING
,
821 .help
= "write error action",
823 .name
= "copy-on-read",
824 .type
= QEMU_OPT_BOOL
,
825 .help
= "copy read data from backing file into image file",
828 { /* end of list */ }
832 DriveInfo
*drive_new(QemuOpts
*all_opts
, BlockInterfaceType block_default_type
)
836 DriveInfo
*dinfo
= NULL
;
838 QemuOpts
*legacy_opts
;
839 DriveMediaType media
= MEDIA_DISK
;
840 BlockInterfaceType type
;
841 int cyls
, heads
, secs
, translation
;
842 int max_devs
, bus_id
, unit_id
, index
;
844 const char *werror
, *rerror
;
845 bool read_only
= false;
848 const char *filename
;
849 Error
*local_err
= NULL
;
852 /* Change legacy command line options into QMP ones */
853 static const struct {
857 { "iops", "throttling.iops-total" },
858 { "iops_rd", "throttling.iops-read" },
859 { "iops_wr", "throttling.iops-write" },
861 { "bps", "throttling.bps-total" },
862 { "bps_rd", "throttling.bps-read" },
863 { "bps_wr", "throttling.bps-write" },
865 { "iops_max", "throttling.iops-total-max" },
866 { "iops_rd_max", "throttling.iops-read-max" },
867 { "iops_wr_max", "throttling.iops-write-max" },
869 { "bps_max", "throttling.bps-total-max" },
870 { "bps_rd_max", "throttling.bps-read-max" },
871 { "bps_wr_max", "throttling.bps-write-max" },
873 { "iops_size", "throttling.iops-size" },
875 { "group", "throttling.group" },
877 { "readonly", BDRV_OPT_READ_ONLY
},
880 for (i
= 0; i
< ARRAY_SIZE(opt_renames
); i
++) {
881 qemu_opt_rename(all_opts
, opt_renames
[i
].from
, opt_renames
[i
].to
,
884 error_report_err(local_err
);
889 value
= qemu_opt_get(all_opts
, "cache");
894 if (bdrv_parse_cache_mode(value
, &flags
, &writethrough
) != 0) {
895 error_report("invalid cache option");
899 /* Specific options take precedence */
900 if (!qemu_opt_get(all_opts
, BDRV_OPT_CACHE_WB
)) {
901 qemu_opt_set_bool(all_opts
, BDRV_OPT_CACHE_WB
,
902 !writethrough
, &error_abort
);
904 if (!qemu_opt_get(all_opts
, BDRV_OPT_CACHE_DIRECT
)) {
905 qemu_opt_set_bool(all_opts
, BDRV_OPT_CACHE_DIRECT
,
906 !!(flags
& BDRV_O_NOCACHE
), &error_abort
);
908 if (!qemu_opt_get(all_opts
, BDRV_OPT_CACHE_NO_FLUSH
)) {
909 qemu_opt_set_bool(all_opts
, BDRV_OPT_CACHE_NO_FLUSH
,
910 !!(flags
& BDRV_O_NO_FLUSH
), &error_abort
);
912 qemu_opt_unset(all_opts
, "cache");
915 /* Get a QDict for processing the options */
916 bs_opts
= qdict_new();
917 qemu_opts_to_qdict(all_opts
, bs_opts
);
919 legacy_opts
= qemu_opts_create(&qemu_legacy_drive_opts
, NULL
, 0,
921 qemu_opts_absorb_qdict(legacy_opts
, bs_opts
, &local_err
);
923 error_report_err(local_err
);
927 /* Deprecated option boot=[on|off] */
928 if (qemu_opt_get(legacy_opts
, "boot") != NULL
) {
929 fprintf(stderr
, "qemu-kvm: boot=on|off is deprecated and will be "
930 "ignored. Future versions will reject this parameter. Please "
931 "update your scripts.\n");
935 value
= qemu_opt_get(legacy_opts
, "media");
937 if (!strcmp(value
, "disk")) {
939 } else if (!strcmp(value
, "cdrom")) {
943 error_report("'%s' invalid media", value
);
948 /* copy-on-read is disabled with a warning for read-only devices */
949 read_only
|= qemu_opt_get_bool(legacy_opts
, BDRV_OPT_READ_ONLY
, false);
950 copy_on_read
= qemu_opt_get_bool(legacy_opts
, "copy-on-read", false);
952 if (read_only
&& copy_on_read
) {
953 error_report("warning: disabling copy-on-read on read-only drive");
954 copy_on_read
= false;
957 qdict_put(bs_opts
, BDRV_OPT_READ_ONLY
,
958 qstring_from_str(read_only
? "on" : "off"));
959 qdict_put(bs_opts
, "copy-on-read",
960 qstring_from_str(copy_on_read
? "on" :"off"));
962 /* Controller type */
963 value
= qemu_opt_get(legacy_opts
, "if");
966 type
< IF_COUNT
&& strcmp(value
, if_name
[type
]);
969 if (type
== IF_COUNT
) {
970 error_report("unsupported bus type '%s'", value
);
974 type
= block_default_type
;
978 cyls
= qemu_opt_get_number(legacy_opts
, "cyls", 0);
979 heads
= qemu_opt_get_number(legacy_opts
, "heads", 0);
980 secs
= qemu_opt_get_number(legacy_opts
, "secs", 0);
982 if (cyls
|| heads
|| secs
) {
984 error_report("invalid physical cyls number");
988 error_report("invalid physical heads number");
992 error_report("invalid physical secs number");
997 translation
= BIOS_ATA_TRANSLATION_AUTO
;
998 value
= qemu_opt_get(legacy_opts
, "trans");
1001 error_report("'%s' trans must be used with cyls, heads and secs",
1005 if (!strcmp(value
, "none")) {
1006 translation
= BIOS_ATA_TRANSLATION_NONE
;
1007 } else if (!strcmp(value
, "lba")) {
1008 translation
= BIOS_ATA_TRANSLATION_LBA
;
1009 } else if (!strcmp(value
, "large")) {
1010 translation
= BIOS_ATA_TRANSLATION_LARGE
;
1011 } else if (!strcmp(value
, "rechs")) {
1012 translation
= BIOS_ATA_TRANSLATION_RECHS
;
1013 } else if (!strcmp(value
, "auto")) {
1014 translation
= BIOS_ATA_TRANSLATION_AUTO
;
1016 error_report("'%s' invalid translation type", value
);
1021 if (media
== MEDIA_CDROM
) {
1022 if (cyls
|| secs
|| heads
) {
1023 error_report("CHS can't be set with media=cdrom");
1028 /* Device address specified by bus/unit or index.
1029 * If none was specified, try to find the first free one. */
1030 bus_id
= qemu_opt_get_number(legacy_opts
, "bus", 0);
1031 unit_id
= qemu_opt_get_number(legacy_opts
, "unit", -1);
1032 index
= qemu_opt_get_number(legacy_opts
, "index", -1);
1034 max_devs
= if_max_devs
[type
];
1037 if (bus_id
!= 0 || unit_id
!= -1) {
1038 error_report("index cannot be used with bus and unit");
1041 bus_id
= drive_index_to_bus_id(type
, index
);
1042 unit_id
= drive_index_to_unit_id(type
, index
);
1045 if (unit_id
== -1) {
1047 while (drive_get(type
, bus_id
, unit_id
) != NULL
) {
1049 if (max_devs
&& unit_id
>= max_devs
) {
1050 unit_id
-= max_devs
;
1056 if (max_devs
&& unit_id
>= max_devs
) {
1057 error_report("unit %d too big (max is %d)", unit_id
, max_devs
- 1);
1061 if (drive_get(type
, bus_id
, unit_id
) != NULL
) {
1062 error_report("drive with bus=%d, unit=%d (index=%d) exists",
1063 bus_id
, unit_id
, index
);
1068 serial
= qemu_opt_get(legacy_opts
, "serial");
1070 /* no id supplied -> create one */
1071 if (qemu_opts_id(all_opts
) == NULL
) {
1073 const char *mediastr
= "";
1074 if (type
== IF_IDE
|| type
== IF_SCSI
) {
1075 mediastr
= (media
== MEDIA_CDROM
) ? "-cd" : "-hd";
1078 new_id
= g_strdup_printf("%s%i%s%i", if_name
[type
], bus_id
,
1081 new_id
= g_strdup_printf("%s%s%i", if_name
[type
],
1084 qdict_put(bs_opts
, "id", qstring_from_str(new_id
));
1088 /* Add virtio block device */
1089 devaddr
= qemu_opt_get(legacy_opts
, "addr");
1090 if (devaddr
&& type
!= IF_VIRTIO
) {
1091 error_report("addr is not supported by this bus type");
1095 if (type
== IF_VIRTIO
) {
1097 devopts
= qemu_opts_create(qemu_find_opts("device"), NULL
, 0,
1099 if (arch_type
== QEMU_ARCH_S390X
) {
1100 qemu_opt_set(devopts
, "driver", "virtio-blk-ccw", &error_abort
);
1102 qemu_opt_set(devopts
, "driver", "virtio-blk-pci", &error_abort
);
1104 qemu_opt_set(devopts
, "drive", qdict_get_str(bs_opts
, "id"),
1107 qemu_opt_set(devopts
, "addr", devaddr
, &error_abort
);
1111 filename
= qemu_opt_get(legacy_opts
, "file");
1113 /* Check werror/rerror compatibility with if=... */
1114 werror
= qemu_opt_get(legacy_opts
, "werror");
1115 if (werror
!= NULL
) {
1116 if (type
!= IF_IDE
&& type
!= IF_SCSI
&& type
!= IF_VIRTIO
&&
1118 error_report("werror is not supported by this bus type");
1121 qdict_put(bs_opts
, "werror", qstring_from_str(werror
));
1124 rerror
= qemu_opt_get(legacy_opts
, "rerror");
1125 if (rerror
!= NULL
) {
1126 if (type
!= IF_IDE
&& type
!= IF_VIRTIO
&& type
!= IF_SCSI
&&
1128 error_report("rerror is not supported by this bus type");
1131 qdict_put(bs_opts
, "rerror", qstring_from_str(rerror
));
1134 /* Actual block device init: Functionality shared with blockdev-add */
1135 blk
= blockdev_init(filename
, bs_opts
, &local_err
);
1139 error_report_err(local_err
);
1146 /* Create legacy DriveInfo */
1147 dinfo
= g_malloc0(sizeof(*dinfo
));
1148 dinfo
->opts
= all_opts
;
1151 dinfo
->heads
= heads
;
1153 dinfo
->trans
= translation
;
1156 dinfo
->bus
= bus_id
;
1157 dinfo
->unit
= unit_id
;
1158 dinfo
->devaddr
= devaddr
;
1159 dinfo
->serial
= g_strdup(serial
);
1161 blk_set_legacy_dinfo(blk
, dinfo
);
1168 dinfo
->media_cd
= media
== MEDIA_CDROM
;
1175 qemu_opts_del(legacy_opts
);
1180 static BlockDriverState
*qmp_get_root_bs(const char *name
, Error
**errp
)
1182 BlockDriverState
*bs
;
1184 bs
= bdrv_lookup_bs(name
, name
, errp
);
1189 if (!bdrv_is_root_node(bs
)) {
1190 error_setg(errp
, "Need a root block node");
1194 if (!bdrv_is_inserted(bs
)) {
1195 error_setg(errp
, "Device has no medium");
1202 static BlockBackend
*qmp_get_blk(const char *blk_name
, const char *qdev_id
,
1207 if (!blk_name
== !qdev_id
) {
1208 error_setg(errp
, "Need exactly one of 'device' and 'id'");
1213 blk
= blk_by_qdev_id(qdev_id
, errp
);
1215 blk
= blk_by_name(blk_name
);
1217 error_set(errp
, ERROR_CLASS_DEVICE_NOT_FOUND
,
1218 "Device '%s' not found", blk_name
);
1225 void hmp_commit(Monitor
*mon
, const QDict
*qdict
)
1227 const char *device
= qdict_get_str(qdict
, "device");
1231 if (!strcmp(device
, "all")) {
1232 ret
= blk_commit_all();
1234 BlockDriverState
*bs
;
1235 AioContext
*aio_context
;
1237 blk
= blk_by_name(device
);
1239 monitor_printf(mon
, "Device '%s' not found\n", device
);
1242 if (!blk_is_available(blk
)) {
1243 monitor_printf(mon
, "Device '%s' has no medium\n", device
);
1248 aio_context
= bdrv_get_aio_context(bs
);
1249 aio_context_acquire(aio_context
);
1251 ret
= bdrv_commit(bs
);
1253 aio_context_release(aio_context
);
1256 monitor_printf(mon
, "'commit' error for '%s': %s\n", device
,
1261 static void blockdev_do_action(TransactionAction
*action
, Error
**errp
)
1263 TransactionActionList list
;
1265 list
.value
= action
;
1267 qmp_transaction(&list
, false, NULL
, errp
);
1270 void qmp_blockdev_snapshot_sync(bool has_device
, const char *device
,
1271 bool has_node_name
, const char *node_name
,
1272 const char *snapshot_file
,
1273 bool has_snapshot_node_name
,
1274 const char *snapshot_node_name
,
1275 bool has_format
, const char *format
,
1276 bool has_mode
, NewImageMode mode
, Error
**errp
)
1278 BlockdevSnapshotSync snapshot
= {
1279 .has_device
= has_device
,
1280 .device
= (char *) device
,
1281 .has_node_name
= has_node_name
,
1282 .node_name
= (char *) node_name
,
1283 .snapshot_file
= (char *) snapshot_file
,
1284 .has_snapshot_node_name
= has_snapshot_node_name
,
1285 .snapshot_node_name
= (char *) snapshot_node_name
,
1286 .has_format
= has_format
,
1287 .format
= (char *) format
,
1288 .has_mode
= has_mode
,
1291 TransactionAction action
= {
1292 .type
= TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
,
1293 .u
.blockdev_snapshot_sync
.data
= &snapshot
,
1295 blockdev_do_action(&action
, errp
);
1298 void qmp_blockdev_snapshot(const char *node
, const char *overlay
,
1301 BlockdevSnapshot snapshot_data
= {
1302 .node
= (char *) node
,
1303 .overlay
= (char *) overlay
1305 TransactionAction action
= {
1306 .type
= TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT
,
1307 .u
.blockdev_snapshot
.data
= &snapshot_data
,
1309 blockdev_do_action(&action
, errp
);
1312 void qmp_blockdev_snapshot_internal_sync(const char *device
,
1316 BlockdevSnapshotInternal snapshot
= {
1317 .device
= (char *) device
,
1318 .name
= (char *) name
1320 TransactionAction action
= {
1321 .type
= TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
,
1322 .u
.blockdev_snapshot_internal_sync
.data
= &snapshot
,
1324 blockdev_do_action(&action
, errp
);
1327 SnapshotInfo
*qmp_blockdev_snapshot_delete_internal_sync(const char *device
,
1334 BlockDriverState
*bs
;
1335 AioContext
*aio_context
;
1336 QEMUSnapshotInfo sn
;
1337 Error
*local_err
= NULL
;
1338 SnapshotInfo
*info
= NULL
;
1341 bs
= qmp_get_root_bs(device
, errp
);
1345 aio_context
= bdrv_get_aio_context(bs
);
1346 aio_context_acquire(aio_context
);
1357 error_setg(errp
, "Name or id must be provided");
1358 goto out_aio_context
;
1361 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE
, errp
)) {
1362 goto out_aio_context
;
1365 ret
= bdrv_snapshot_find_by_id_and_name(bs
, id
, name
, &sn
, &local_err
);
1367 error_propagate(errp
, local_err
);
1368 goto out_aio_context
;
1372 "Snapshot with id '%s' and name '%s' does not exist on "
1374 STR_OR_NULL(id
), STR_OR_NULL(name
), device
);
1375 goto out_aio_context
;
1378 bdrv_snapshot_delete(bs
, id
, name
, &local_err
);
1380 error_propagate(errp
, local_err
);
1381 goto out_aio_context
;
1384 aio_context_release(aio_context
);
1386 info
= g_new0(SnapshotInfo
, 1);
1387 info
->id
= g_strdup(sn
.id_str
);
1388 info
->name
= g_strdup(sn
.name
);
1389 info
->date_nsec
= sn
.date_nsec
;
1390 info
->date_sec
= sn
.date_sec
;
1391 info
->vm_state_size
= sn
.vm_state_size
;
1392 info
->vm_clock_nsec
= sn
.vm_clock_nsec
% 1000000000;
1393 info
->vm_clock_sec
= sn
.vm_clock_nsec
/ 1000000000;
1398 aio_context_release(aio_context
);
1403 * block_dirty_bitmap_lookup:
1404 * Return a dirty bitmap (if present), after validating
1405 * the node reference and bitmap names.
1407 * @node: The name of the BDS node to search for bitmaps
1408 * @name: The name of the bitmap to search for
1409 * @pbs: Output pointer for BDS lookup, if desired. Can be NULL.
1410 * @paio: Output pointer for aio_context acquisition, if desired. Can be NULL.
1411 * @errp: Output pointer for error information. Can be NULL.
1413 * @return: A bitmap object on success, or NULL on failure.
1415 static BdrvDirtyBitmap
*block_dirty_bitmap_lookup(const char *node
,
1417 BlockDriverState
**pbs
,
1421 BlockDriverState
*bs
;
1422 BdrvDirtyBitmap
*bitmap
;
1423 AioContext
*aio_context
;
1426 error_setg(errp
, "Node cannot be NULL");
1430 error_setg(errp
, "Bitmap name cannot be NULL");
1433 bs
= bdrv_lookup_bs(node
, node
, NULL
);
1435 error_setg(errp
, "Node '%s' not found", node
);
1439 aio_context
= bdrv_get_aio_context(bs
);
1440 aio_context_acquire(aio_context
);
1442 bitmap
= bdrv_find_dirty_bitmap(bs
, name
);
1444 error_setg(errp
, "Dirty bitmap '%s' not found", name
);
1452 *paio
= aio_context
;
1454 aio_context_release(aio_context
);
1460 aio_context_release(aio_context
);
1464 /* New and old BlockDriverState structs for atomic group operations */
1466 typedef struct BlkActionState BlkActionState
;
1470 * Table of operations that define an Action.
1472 * @instance_size: Size of state struct, in bytes.
1473 * @prepare: Prepare the work, must NOT be NULL.
1474 * @commit: Commit the changes, can be NULL.
1475 * @abort: Abort the changes on fail, can be NULL.
1476 * @clean: Clean up resources after all transaction actions have called
1477 * commit() or abort(). Can be NULL.
1479 * Only prepare() may fail. In a single transaction, only one of commit() or
1480 * abort() will be called. clean() will always be called if it is present.
1482 typedef struct BlkActionOps
{
1483 size_t instance_size
;
1484 void (*prepare
)(BlkActionState
*common
, Error
**errp
);
1485 void (*commit
)(BlkActionState
*common
);
1486 void (*abort
)(BlkActionState
*common
);
1487 void (*clean
)(BlkActionState
*common
);
1492 * Describes one Action's state within a Transaction.
1494 * @action: QAPI-defined enum identifying which Action to perform.
1495 * @ops: Table of ActionOps this Action can perform.
1496 * @block_job_txn: Transaction which this action belongs to.
1497 * @entry: List membership for all Actions in this Transaction.
1499 * This structure must be arranged as first member in a subclassed type,
1500 * assuming that the compiler will also arrange it to the same offsets as the
1503 struct BlkActionState
{
1504 TransactionAction
*action
;
1505 const BlkActionOps
*ops
;
1506 BlockJobTxn
*block_job_txn
;
1507 TransactionProperties
*txn_props
;
1508 QSIMPLEQ_ENTRY(BlkActionState
) entry
;
1511 /* internal snapshot private data */
1512 typedef struct InternalSnapshotState
{
1513 BlkActionState common
;
1514 BlockDriverState
*bs
;
1515 AioContext
*aio_context
;
1516 QEMUSnapshotInfo sn
;
1518 } InternalSnapshotState
;
1521 static int action_check_completion_mode(BlkActionState
*s
, Error
**errp
)
1523 if (s
->txn_props
->completion_mode
!= ACTION_COMPLETION_MODE_INDIVIDUAL
) {
1525 "Action '%s' does not support Transaction property "
1526 "completion-mode = %s",
1527 TransactionActionKind_lookup
[s
->action
->type
],
1528 ActionCompletionMode_lookup
[s
->txn_props
->completion_mode
]);
1534 static void internal_snapshot_prepare(BlkActionState
*common
,
1537 Error
*local_err
= NULL
;
1540 BlockDriverState
*bs
;
1541 QEMUSnapshotInfo old_sn
, *sn
;
1544 BlockdevSnapshotInternal
*internal
;
1545 InternalSnapshotState
*state
;
1548 g_assert(common
->action
->type
==
1549 TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
);
1550 internal
= common
->action
->u
.blockdev_snapshot_internal_sync
.data
;
1551 state
= DO_UPCAST(InternalSnapshotState
, common
, common
);
1553 /* 1. parse input */
1554 device
= internal
->device
;
1555 name
= internal
->name
;
1557 /* 2. check for validation */
1558 if (action_check_completion_mode(common
, errp
) < 0) {
1562 bs
= qmp_get_root_bs(device
, errp
);
1567 /* AioContext is released in .clean() */
1568 state
->aio_context
= bdrv_get_aio_context(bs
);
1569 aio_context_acquire(state
->aio_context
);
1572 bdrv_drained_begin(bs
);
1574 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT
, errp
)) {
1578 if (bdrv_is_read_only(bs
)) {
1579 error_setg(errp
, "Device '%s' is read only", device
);
1583 if (!bdrv_can_snapshot(bs
)) {
1584 error_setg(errp
, "Block format '%s' used by device '%s' "
1585 "does not support internal snapshots",
1586 bs
->drv
->format_name
, device
);
1590 if (!strlen(name
)) {
1591 error_setg(errp
, "Name is empty");
1595 /* check whether a snapshot with name exist */
1596 ret
= bdrv_snapshot_find_by_id_and_name(bs
, NULL
, name
, &old_sn
,
1599 error_propagate(errp
, local_err
);
1603 "Snapshot with name '%s' already exists on device '%s'",
1608 /* 3. take the snapshot */
1610 pstrcpy(sn
->name
, sizeof(sn
->name
), name
);
1611 qemu_gettimeofday(&tv
);
1612 sn
->date_sec
= tv
.tv_sec
;
1613 sn
->date_nsec
= tv
.tv_usec
* 1000;
1614 sn
->vm_clock_nsec
= qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
);
1616 ret1
= bdrv_snapshot_create(bs
, sn
);
1618 error_setg_errno(errp
, -ret1
,
1619 "Failed to create snapshot '%s' on device '%s'",
1624 /* 4. succeed, mark a snapshot is created */
1625 state
->created
= true;
1628 static void internal_snapshot_abort(BlkActionState
*common
)
1630 InternalSnapshotState
*state
=
1631 DO_UPCAST(InternalSnapshotState
, common
, common
);
1632 BlockDriverState
*bs
= state
->bs
;
1633 QEMUSnapshotInfo
*sn
= &state
->sn
;
1634 Error
*local_error
= NULL
;
1636 if (!state
->created
) {
1640 if (bdrv_snapshot_delete(bs
, sn
->id_str
, sn
->name
, &local_error
) < 0) {
1641 error_reportf_err(local_error
,
1642 "Failed to delete snapshot with id '%s' and "
1643 "name '%s' on device '%s' in abort: ",
1644 sn
->id_str
, sn
->name
,
1645 bdrv_get_device_name(bs
));
1649 static void internal_snapshot_clean(BlkActionState
*common
)
1651 InternalSnapshotState
*state
= DO_UPCAST(InternalSnapshotState
,
1654 if (state
->aio_context
) {
1656 bdrv_drained_end(state
->bs
);
1658 aio_context_release(state
->aio_context
);
1662 /* external snapshot private data */
1663 typedef struct ExternalSnapshotState
{
1664 BlkActionState common
;
1665 BlockDriverState
*old_bs
;
1666 BlockDriverState
*new_bs
;
1667 AioContext
*aio_context
;
1668 } ExternalSnapshotState
;
1670 static void external_snapshot_prepare(BlkActionState
*common
,
1674 QDict
*options
= NULL
;
1675 Error
*local_err
= NULL
;
1676 /* Device and node name of the image to generate the snapshot from */
1678 const char *node_name
;
1679 /* Reference to the new image (for 'blockdev-snapshot') */
1680 const char *snapshot_ref
;
1681 /* File name of the new image (for 'blockdev-snapshot-sync') */
1682 const char *new_image_file
;
1683 ExternalSnapshotState
*state
=
1684 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1685 TransactionAction
*action
= common
->action
;
1687 /* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar
1688 * purpose but a different set of parameters */
1689 switch (action
->type
) {
1690 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT
:
1692 BlockdevSnapshot
*s
= action
->u
.blockdev_snapshot
.data
;
1694 node_name
= s
->node
;
1695 new_image_file
= NULL
;
1696 snapshot_ref
= s
->overlay
;
1699 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
:
1701 BlockdevSnapshotSync
*s
= action
->u
.blockdev_snapshot_sync
.data
;
1702 device
= s
->has_device
? s
->device
: NULL
;
1703 node_name
= s
->has_node_name
? s
->node_name
: NULL
;
1704 new_image_file
= s
->snapshot_file
;
1705 snapshot_ref
= NULL
;
1709 g_assert_not_reached();
1712 /* start processing */
1713 if (action_check_completion_mode(common
, errp
) < 0) {
1717 state
->old_bs
= bdrv_lookup_bs(device
, node_name
, errp
);
1718 if (!state
->old_bs
) {
1722 /* Acquire AioContext now so any threads operating on old_bs stop */
1723 state
->aio_context
= bdrv_get_aio_context(state
->old_bs
);
1724 aio_context_acquire(state
->aio_context
);
1725 bdrv_drained_begin(state
->old_bs
);
1727 if (!bdrv_is_inserted(state
->old_bs
)) {
1728 error_setg(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
1732 if (bdrv_op_is_blocked(state
->old_bs
,
1733 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT
, errp
)) {
1737 if (!bdrv_is_read_only(state
->old_bs
)) {
1738 if (bdrv_flush(state
->old_bs
)) {
1739 error_setg(errp
, QERR_IO_ERROR
);
1744 if (!bdrv_is_first_non_filter(state
->old_bs
)) {
1745 error_setg(errp
, QERR_FEATURE_DISABLED
, "snapshot");
1749 if (action
->type
== TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
) {
1750 BlockdevSnapshotSync
*s
= action
->u
.blockdev_snapshot_sync
.data
;
1751 const char *format
= s
->has_format
? s
->format
: "qcow2";
1752 enum NewImageMode mode
;
1753 const char *snapshot_node_name
=
1754 s
->has_snapshot_node_name
? s
->snapshot_node_name
: NULL
;
1756 if (node_name
&& !snapshot_node_name
) {
1757 error_setg(errp
, "New snapshot node name missing");
1761 if (snapshot_node_name
&&
1762 bdrv_lookup_bs(snapshot_node_name
, snapshot_node_name
, NULL
)) {
1763 error_setg(errp
, "New snapshot node name already in use");
1767 flags
= state
->old_bs
->open_flags
;
1768 flags
&= ~(BDRV_O_SNAPSHOT
| BDRV_O_NO_BACKING
| BDRV_O_COPY_ON_READ
);
1770 /* create new image w/backing file */
1771 mode
= s
->has_mode
? s
->mode
: NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
1772 if (mode
!= NEW_IMAGE_MODE_EXISTING
) {
1773 int64_t size
= bdrv_getlength(state
->old_bs
);
1775 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
1778 bdrv_img_create(new_image_file
, format
,
1779 state
->old_bs
->filename
,
1780 state
->old_bs
->drv
->format_name
,
1781 NULL
, size
, flags
, &local_err
, false);
1783 error_propagate(errp
, local_err
);
1788 options
= qdict_new();
1789 if (s
->has_snapshot_node_name
) {
1790 qdict_put(options
, "node-name",
1791 qstring_from_str(snapshot_node_name
));
1793 qdict_put(options
, "driver", qstring_from_str(format
));
1795 flags
|= BDRV_O_NO_BACKING
;
1798 state
->new_bs
= bdrv_open(new_image_file
, snapshot_ref
, options
, flags
,
1800 /* We will manually add the backing_hd field to the bs later */
1801 if (!state
->new_bs
) {
1805 if (bdrv_has_blk(state
->new_bs
)) {
1806 error_setg(errp
, "The snapshot is already in use by %s",
1807 bdrv_get_parent_name(state
->new_bs
));
1811 if (bdrv_op_is_blocked(state
->new_bs
, BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT
,
1816 if (state
->new_bs
->backing
!= NULL
) {
1817 error_setg(errp
, "The snapshot already has a backing image");
1821 if (!state
->new_bs
->drv
->supports_backing
) {
1822 error_setg(errp
, "The snapshot does not support backing images");
1826 static void external_snapshot_commit(BlkActionState
*common
)
1828 ExternalSnapshotState
*state
=
1829 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1831 bdrv_set_aio_context(state
->new_bs
, state
->aio_context
);
1833 /* This removes our old bs and adds the new bs */
1834 bdrv_append(state
->new_bs
, state
->old_bs
);
1835 /* We don't need (or want) to use the transactional
1836 * bdrv_reopen_multiple() across all the entries at once, because we
1837 * don't want to abort all of them if one of them fails the reopen */
1838 if (!state
->old_bs
->copy_on_read
) {
1839 bdrv_reopen(state
->old_bs
, state
->old_bs
->open_flags
& ~BDRV_O_RDWR
,
1844 static void external_snapshot_abort(BlkActionState
*common
)
1846 ExternalSnapshotState
*state
=
1847 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1848 if (state
->new_bs
) {
1849 bdrv_unref(state
->new_bs
);
1853 static void external_snapshot_clean(BlkActionState
*common
)
1855 ExternalSnapshotState
*state
=
1856 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1857 if (state
->aio_context
) {
1858 bdrv_drained_end(state
->old_bs
);
1859 aio_context_release(state
->aio_context
);
1863 typedef struct DriveBackupState
{
1864 BlkActionState common
;
1865 BlockDriverState
*bs
;
1866 AioContext
*aio_context
;
1870 static void do_drive_backup(DriveBackup
*backup
, BlockJobTxn
*txn
,
1873 static void drive_backup_prepare(BlkActionState
*common
, Error
**errp
)
1875 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1876 BlockDriverState
*bs
;
1877 DriveBackup
*backup
;
1878 Error
*local_err
= NULL
;
1880 assert(common
->action
->type
== TRANSACTION_ACTION_KIND_DRIVE_BACKUP
);
1881 backup
= common
->action
->u
.drive_backup
.data
;
1883 bs
= qmp_get_root_bs(backup
->device
, errp
);
1888 /* AioContext is released in .clean() */
1889 state
->aio_context
= bdrv_get_aio_context(bs
);
1890 aio_context_acquire(state
->aio_context
);
1891 bdrv_drained_begin(bs
);
1894 do_drive_backup(backup
, common
->block_job_txn
, &local_err
);
1896 error_propagate(errp
, local_err
);
1900 state
->job
= state
->bs
->job
;
1903 static void drive_backup_abort(BlkActionState
*common
)
1905 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1906 BlockDriverState
*bs
= state
->bs
;
1908 /* Only cancel if it's the job we started */
1909 if (bs
&& bs
->job
&& bs
->job
== state
->job
) {
1910 block_job_cancel_sync(bs
->job
);
1914 static void drive_backup_clean(BlkActionState
*common
)
1916 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1918 if (state
->aio_context
) {
1919 bdrv_drained_end(state
->bs
);
1920 aio_context_release(state
->aio_context
);
1924 typedef struct BlockdevBackupState
{
1925 BlkActionState common
;
1926 BlockDriverState
*bs
;
1928 AioContext
*aio_context
;
1929 } BlockdevBackupState
;
1931 static void do_blockdev_backup(BlockdevBackup
*backup
, BlockJobTxn
*txn
,
1934 static void blockdev_backup_prepare(BlkActionState
*common
, Error
**errp
)
1936 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
1937 BlockdevBackup
*backup
;
1938 BlockDriverState
*bs
, *target
;
1939 Error
*local_err
= NULL
;
1941 assert(common
->action
->type
== TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP
);
1942 backup
= common
->action
->u
.blockdev_backup
.data
;
1944 bs
= qmp_get_root_bs(backup
->device
, errp
);
1949 target
= bdrv_lookup_bs(backup
->target
, backup
->target
, errp
);
1954 /* AioContext is released in .clean() */
1955 state
->aio_context
= bdrv_get_aio_context(bs
);
1956 if (state
->aio_context
!= bdrv_get_aio_context(target
)) {
1957 state
->aio_context
= NULL
;
1958 error_setg(errp
, "Backup between two IO threads is not implemented");
1961 aio_context_acquire(state
->aio_context
);
1963 bdrv_drained_begin(state
->bs
);
1965 do_blockdev_backup(backup
, common
->block_job_txn
, &local_err
);
1967 error_propagate(errp
, local_err
);
1971 state
->job
= state
->bs
->job
;
1974 static void blockdev_backup_abort(BlkActionState
*common
)
1976 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
1977 BlockDriverState
*bs
= state
->bs
;
1979 /* Only cancel if it's the job we started */
1980 if (bs
&& bs
->job
&& bs
->job
== state
->job
) {
1981 block_job_cancel_sync(bs
->job
);
1985 static void blockdev_backup_clean(BlkActionState
*common
)
1987 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
1989 if (state
->aio_context
) {
1990 bdrv_drained_end(state
->bs
);
1991 aio_context_release(state
->aio_context
);
1995 typedef struct BlockDirtyBitmapState
{
1996 BlkActionState common
;
1997 BdrvDirtyBitmap
*bitmap
;
1998 BlockDriverState
*bs
;
1999 AioContext
*aio_context
;
2002 } BlockDirtyBitmapState
;
2004 static void block_dirty_bitmap_add_prepare(BlkActionState
*common
,
2007 Error
*local_err
= NULL
;
2008 BlockDirtyBitmapAdd
*action
;
2009 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2012 if (action_check_completion_mode(common
, errp
) < 0) {
2016 action
= common
->action
->u
.block_dirty_bitmap_add
.data
;
2017 /* AIO context taken and released within qmp_block_dirty_bitmap_add */
2018 qmp_block_dirty_bitmap_add(action
->node
, action
->name
,
2019 action
->has_granularity
, action
->granularity
,
2023 state
->prepared
= true;
2025 error_propagate(errp
, local_err
);
2029 static void block_dirty_bitmap_add_abort(BlkActionState
*common
)
2031 BlockDirtyBitmapAdd
*action
;
2032 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2035 action
= common
->action
->u
.block_dirty_bitmap_add
.data
;
2036 /* Should not be able to fail: IF the bitmap was added via .prepare(),
2037 * then the node reference and bitmap name must have been valid.
2039 if (state
->prepared
) {
2040 qmp_block_dirty_bitmap_remove(action
->node
, action
->name
, &error_abort
);
2044 static void block_dirty_bitmap_clear_prepare(BlkActionState
*common
,
2047 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2049 BlockDirtyBitmap
*action
;
2051 if (action_check_completion_mode(common
, errp
) < 0) {
2055 action
= common
->action
->u
.block_dirty_bitmap_clear
.data
;
2056 state
->bitmap
= block_dirty_bitmap_lookup(action
->node
,
2059 &state
->aio_context
,
2061 if (!state
->bitmap
) {
2065 if (bdrv_dirty_bitmap_frozen(state
->bitmap
)) {
2066 error_setg(errp
, "Cannot modify a frozen bitmap");
2068 } else if (!bdrv_dirty_bitmap_enabled(state
->bitmap
)) {
2069 error_setg(errp
, "Cannot clear a disabled bitmap");
2073 bdrv_clear_dirty_bitmap(state
->bitmap
, &state
->backup
);
2074 /* AioContext is released in .clean() */
2077 static void block_dirty_bitmap_clear_abort(BlkActionState
*common
)
2079 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2082 bdrv_undo_clear_dirty_bitmap(state
->bitmap
, state
->backup
);
2085 static void block_dirty_bitmap_clear_commit(BlkActionState
*common
)
2087 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2090 hbitmap_free(state
->backup
);
2093 static void block_dirty_bitmap_clear_clean(BlkActionState
*common
)
2095 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2098 if (state
->aio_context
) {
2099 aio_context_release(state
->aio_context
);
2103 static void abort_prepare(BlkActionState
*common
, Error
**errp
)
2105 error_setg(errp
, "Transaction aborted using Abort action");
2108 static void abort_commit(BlkActionState
*common
)
2110 g_assert_not_reached(); /* this action never succeeds */
2113 static const BlkActionOps actions
[] = {
2114 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT
] = {
2115 .instance_size
= sizeof(ExternalSnapshotState
),
2116 .prepare
= external_snapshot_prepare
,
2117 .commit
= external_snapshot_commit
,
2118 .abort
= external_snapshot_abort
,
2119 .clean
= external_snapshot_clean
,
2121 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
] = {
2122 .instance_size
= sizeof(ExternalSnapshotState
),
2123 .prepare
= external_snapshot_prepare
,
2124 .commit
= external_snapshot_commit
,
2125 .abort
= external_snapshot_abort
,
2126 .clean
= external_snapshot_clean
,
2128 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP
] = {
2129 .instance_size
= sizeof(DriveBackupState
),
2130 .prepare
= drive_backup_prepare
,
2131 .abort
= drive_backup_abort
,
2132 .clean
= drive_backup_clean
,
2134 [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP
] = {
2135 .instance_size
= sizeof(BlockdevBackupState
),
2136 .prepare
= blockdev_backup_prepare
,
2137 .abort
= blockdev_backup_abort
,
2138 .clean
= blockdev_backup_clean
,
2140 [TRANSACTION_ACTION_KIND_ABORT
] = {
2141 .instance_size
= sizeof(BlkActionState
),
2142 .prepare
= abort_prepare
,
2143 .commit
= abort_commit
,
2145 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
] = {
2146 .instance_size
= sizeof(InternalSnapshotState
),
2147 .prepare
= internal_snapshot_prepare
,
2148 .abort
= internal_snapshot_abort
,
2149 .clean
= internal_snapshot_clean
,
2151 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD
] = {
2152 .instance_size
= sizeof(BlockDirtyBitmapState
),
2153 .prepare
= block_dirty_bitmap_add_prepare
,
2154 .abort
= block_dirty_bitmap_add_abort
,
2156 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR
] = {
2157 .instance_size
= sizeof(BlockDirtyBitmapState
),
2158 .prepare
= block_dirty_bitmap_clear_prepare
,
2159 .commit
= block_dirty_bitmap_clear_commit
,
2160 .abort
= block_dirty_bitmap_clear_abort
,
2161 .clean
= block_dirty_bitmap_clear_clean
,
2166 * Allocate a TransactionProperties structure if necessary, and fill
2167 * that structure with desired defaults if they are unset.
2169 static TransactionProperties
*get_transaction_properties(
2170 TransactionProperties
*props
)
2173 props
= g_new0(TransactionProperties
, 1);
2176 if (!props
->has_completion_mode
) {
2177 props
->has_completion_mode
= true;
2178 props
->completion_mode
= ACTION_COMPLETION_MODE_INDIVIDUAL
;
2185 * 'Atomic' group operations. The operations are performed as a set, and if
2186 * any fail then we roll back all operations in the group.
2188 void qmp_transaction(TransactionActionList
*dev_list
,
2190 struct TransactionProperties
*props
,
2193 TransactionActionList
*dev_entry
= dev_list
;
2194 BlockJobTxn
*block_job_txn
= NULL
;
2195 BlkActionState
*state
, *next
;
2196 Error
*local_err
= NULL
;
2198 QSIMPLEQ_HEAD(snap_bdrv_states
, BlkActionState
) snap_bdrv_states
;
2199 QSIMPLEQ_INIT(&snap_bdrv_states
);
2201 /* Does this transaction get canceled as a group on failure?
2202 * If not, we don't really need to make a BlockJobTxn.
2204 props
= get_transaction_properties(props
);
2205 if (props
->completion_mode
!= ACTION_COMPLETION_MODE_INDIVIDUAL
) {
2206 block_job_txn
= block_job_txn_new();
2209 /* drain all i/o before any operations */
2212 /* We don't do anything in this loop that commits us to the operations */
2213 while (NULL
!= dev_entry
) {
2214 TransactionAction
*dev_info
= NULL
;
2215 const BlkActionOps
*ops
;
2217 dev_info
= dev_entry
->value
;
2218 dev_entry
= dev_entry
->next
;
2220 assert(dev_info
->type
< ARRAY_SIZE(actions
));
2222 ops
= &actions
[dev_info
->type
];
2223 assert(ops
->instance_size
> 0);
2225 state
= g_malloc0(ops
->instance_size
);
2227 state
->action
= dev_info
;
2228 state
->block_job_txn
= block_job_txn
;
2229 state
->txn_props
= props
;
2230 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states
, state
, entry
);
2232 state
->ops
->prepare(state
, &local_err
);
2234 error_propagate(errp
, local_err
);
2235 goto delete_and_fail
;
2239 QSIMPLEQ_FOREACH(state
, &snap_bdrv_states
, entry
) {
2240 if (state
->ops
->commit
) {
2241 state
->ops
->commit(state
);
2249 /* failure, and it is all-or-none; roll back all operations */
2250 QSIMPLEQ_FOREACH(state
, &snap_bdrv_states
, entry
) {
2251 if (state
->ops
->abort
) {
2252 state
->ops
->abort(state
);
2256 QSIMPLEQ_FOREACH_SAFE(state
, &snap_bdrv_states
, entry
, next
) {
2257 if (state
->ops
->clean
) {
2258 state
->ops
->clean(state
);
2263 qapi_free_TransactionProperties(props
);
2265 block_job_txn_unref(block_job_txn
);
2268 void qmp_eject(bool has_device
, const char *device
,
2269 bool has_id
, const char *id
,
2270 bool has_force
, bool force
, Error
**errp
)
2272 Error
*local_err
= NULL
;
2279 rc
= do_open_tray(has_device
? device
: NULL
,
2282 if (rc
&& rc
!= -ENOSYS
) {
2283 error_propagate(errp
, local_err
);
2286 error_free(local_err
);
2288 qmp_x_blockdev_remove_medium(has_device
, device
, has_id
, id
, errp
);
2291 void qmp_block_passwd(bool has_device
, const char *device
,
2292 bool has_node_name
, const char *node_name
,
2293 const char *password
, Error
**errp
)
2295 Error
*local_err
= NULL
;
2296 BlockDriverState
*bs
;
2297 AioContext
*aio_context
;
2299 bs
= bdrv_lookup_bs(has_device
? device
: NULL
,
2300 has_node_name
? node_name
: NULL
,
2303 error_propagate(errp
, local_err
);
2307 aio_context
= bdrv_get_aio_context(bs
);
2308 aio_context_acquire(aio_context
);
2310 bdrv_add_key(bs
, password
, errp
);
2312 aio_context_release(aio_context
);
2316 * Attempt to open the tray of @device.
2317 * If @force, ignore its tray lock.
2318 * Else, if the tray is locked, don't open it, but ask the guest to open it.
2319 * On error, store an error through @errp and return -errno.
2320 * If @device does not exist, return -ENODEV.
2321 * If it has no removable media, return -ENOTSUP.
2322 * If it has no tray, return -ENOSYS.
2323 * If the guest was asked to open the tray, return -EINPROGRESS.
2326 static int do_open_tray(const char *blk_name
, const char *qdev_id
,
2327 bool force
, Error
**errp
)
2330 const char *device
= qdev_id
?: blk_name
;
2333 blk
= qmp_get_blk(blk_name
, qdev_id
, errp
);
2338 if (!blk_dev_has_removable_media(blk
)) {
2339 error_setg(errp
, "Device '%s' is not removable", device
);
2343 if (!blk_dev_has_tray(blk
)) {
2344 error_setg(errp
, "Device '%s' does not have a tray", device
);
2348 if (blk_dev_is_tray_open(blk
)) {
2352 locked
= blk_dev_is_medium_locked(blk
);
2354 blk_dev_eject_request(blk
, force
);
2357 if (!locked
|| force
) {
2358 blk_dev_change_media_cb(blk
, false);
2361 if (locked
&& !force
) {
2362 error_setg(errp
, "Device '%s' is locked and force was not specified, "
2363 "wait for tray to open and try again", device
);
2364 return -EINPROGRESS
;
2370 void qmp_blockdev_open_tray(bool has_device
, const char *device
,
2371 bool has_id
, const char *id
,
2372 bool has_force
, bool force
,
2375 Error
*local_err
= NULL
;
2381 rc
= do_open_tray(has_device
? device
: NULL
,
2384 if (rc
&& rc
!= -ENOSYS
&& rc
!= -EINPROGRESS
) {
2385 error_propagate(errp
, local_err
);
2388 error_free(local_err
);
2391 void qmp_blockdev_close_tray(bool has_device
, const char *device
,
2392 bool has_id
, const char *id
,
2397 device
= has_device
? device
: NULL
;
2398 id
= has_id
? id
: NULL
;
2400 blk
= qmp_get_blk(device
, id
, errp
);
2405 if (!blk_dev_has_removable_media(blk
)) {
2406 error_setg(errp
, "Device '%s' is not removable", device
?: id
);
2410 if (!blk_dev_has_tray(blk
)) {
2411 /* Ignore this command on tray-less devices */
2415 if (!blk_dev_is_tray_open(blk
)) {
2419 blk_dev_change_media_cb(blk
, true);
2422 void qmp_x_blockdev_remove_medium(bool has_device
, const char *device
,
2423 bool has_id
, const char *id
, Error
**errp
)
2426 BlockDriverState
*bs
;
2427 AioContext
*aio_context
;
2428 bool has_attached_device
;
2430 device
= has_device
? device
: NULL
;
2431 id
= has_id
? id
: NULL
;
2433 blk
= qmp_get_blk(device
, id
, errp
);
2438 /* For BBs without a device, we can exchange the BDS tree at will */
2439 has_attached_device
= blk_get_attached_dev(blk
);
2441 if (has_attached_device
&& !blk_dev_has_removable_media(blk
)) {
2442 error_setg(errp
, "Device '%s' is not removable", device
?: id
);
2446 if (has_attached_device
&& blk_dev_has_tray(blk
) &&
2447 !blk_dev_is_tray_open(blk
))
2449 error_setg(errp
, "Tray of device '%s' is not open", device
?: id
);
2458 aio_context
= bdrv_get_aio_context(bs
);
2459 aio_context_acquire(aio_context
);
2461 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_EJECT
, errp
)) {
2467 if (!blk_dev_has_tray(blk
)) {
2468 /* For tray-less devices, blockdev-open-tray is a no-op (or may not be
2469 * called at all); therefore, the medium needs to be ejected here.
2470 * Do it after blk_remove_bs() so blk_is_inserted(blk) returns the @load
2471 * value passed here (i.e. false). */
2472 blk_dev_change_media_cb(blk
, false);
2476 aio_context_release(aio_context
);
2479 static void qmp_blockdev_insert_anon_medium(BlockBackend
*blk
,
2480 BlockDriverState
*bs
, Error
**errp
)
2484 /* For BBs without a device, we can exchange the BDS tree at will */
2485 has_device
= blk_get_attached_dev(blk
);
2487 if (has_device
&& !blk_dev_has_removable_media(blk
)) {
2488 error_setg(errp
, "Device is not removable");
2492 if (has_device
&& blk_dev_has_tray(blk
) && !blk_dev_is_tray_open(blk
)) {
2493 error_setg(errp
, "Tray of the device is not open");
2498 error_setg(errp
, "There already is a medium in the device");
2502 blk_insert_bs(blk
, bs
);
2504 if (!blk_dev_has_tray(blk
)) {
2505 /* For tray-less devices, blockdev-close-tray is a no-op (or may not be
2506 * called at all); therefore, the medium needs to be pushed into the
2508 * Do it after blk_insert_bs() so blk_is_inserted(blk) returns the @load
2509 * value passed here (i.e. true). */
2510 blk_dev_change_media_cb(blk
, true);
2514 void qmp_x_blockdev_insert_medium(bool has_device
, const char *device
,
2515 bool has_id
, const char *id
,
2516 const char *node_name
, Error
**errp
)
2519 BlockDriverState
*bs
;
2521 blk
= qmp_get_blk(has_device
? device
: NULL
,
2528 bs
= bdrv_find_node(node_name
);
2530 error_setg(errp
, "Node '%s' not found", node_name
);
2534 if (bdrv_has_blk(bs
)) {
2535 error_setg(errp
, "Node '%s' is already in use by '%s'", node_name
,
2536 bdrv_get_parent_name(bs
));
2540 qmp_blockdev_insert_anon_medium(blk
, bs
, errp
);
2543 void qmp_blockdev_change_medium(const char *device
, const char *filename
,
2544 bool has_format
, const char *format
,
2546 BlockdevChangeReadOnlyMode read_only
,
2550 BlockDriverState
*medium_bs
= NULL
;
2553 QDict
*options
= NULL
;
2556 blk
= blk_by_name(device
);
2558 error_set(errp
, ERROR_CLASS_DEVICE_NOT_FOUND
,
2559 "Device '%s' not found", device
);
2564 blk_update_root_state(blk
);
2567 bdrv_flags
= blk_get_open_flags_from_root_state(blk
);
2568 bdrv_flags
&= ~(BDRV_O_TEMPORARY
| BDRV_O_SNAPSHOT
| BDRV_O_NO_BACKING
|
2571 if (!has_read_only
) {
2572 read_only
= BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN
;
2575 switch (read_only
) {
2576 case BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN
:
2579 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_ONLY
:
2580 bdrv_flags
&= ~BDRV_O_RDWR
;
2583 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_WRITE
:
2584 bdrv_flags
|= BDRV_O_RDWR
;
2592 options
= qdict_new();
2593 qdict_put(options
, "driver", qstring_from_str(format
));
2596 medium_bs
= bdrv_open(filename
, NULL
, options
, bdrv_flags
, errp
);
2601 bdrv_add_key(medium_bs
, NULL
, &err
);
2603 error_propagate(errp
, err
);
2607 rc
= do_open_tray(device
, NULL
, false, &err
);
2608 if (rc
&& rc
!= -ENOSYS
) {
2609 error_propagate(errp
, err
);
2615 qmp_x_blockdev_remove_medium(true, device
, false, NULL
, errp
);
2617 error_propagate(errp
, err
);
2621 qmp_blockdev_insert_anon_medium(blk
, medium_bs
, &err
);
2623 error_propagate(errp
, err
);
2627 blk_apply_root_state(blk
, medium_bs
);
2629 qmp_blockdev_close_tray(true, device
, false, NULL
, errp
);
2632 /* If the medium has been inserted, the device has its own reference, so
2633 * ours must be relinquished; and if it has not been inserted successfully,
2634 * the reference must be relinquished anyway */
2635 bdrv_unref(medium_bs
);
2638 /* throttling disk I/O limits */
2639 void qmp_block_set_io_throttle(BlockIOThrottle
*arg
, Error
**errp
)
2642 BlockDriverState
*bs
;
2644 AioContext
*aio_context
;
2646 blk
= blk_by_name(arg
->device
);
2648 error_set(errp
, ERROR_CLASS_DEVICE_NOT_FOUND
,
2649 "Device '%s' not found", arg
->device
);
2653 aio_context
= blk_get_aio_context(blk
);
2654 aio_context_acquire(aio_context
);
2658 error_setg(errp
, "Device '%s' has no medium", arg
->device
);
2662 throttle_config_init(&cfg
);
2663 cfg
.buckets
[THROTTLE_BPS_TOTAL
].avg
= arg
->bps
;
2664 cfg
.buckets
[THROTTLE_BPS_READ
].avg
= arg
->bps_rd
;
2665 cfg
.buckets
[THROTTLE_BPS_WRITE
].avg
= arg
->bps_wr
;
2667 cfg
.buckets
[THROTTLE_OPS_TOTAL
].avg
= arg
->iops
;
2668 cfg
.buckets
[THROTTLE_OPS_READ
].avg
= arg
->iops_rd
;
2669 cfg
.buckets
[THROTTLE_OPS_WRITE
].avg
= arg
->iops_wr
;
2671 if (arg
->has_bps_max
) {
2672 cfg
.buckets
[THROTTLE_BPS_TOTAL
].max
= arg
->bps_max
;
2674 if (arg
->has_bps_rd_max
) {
2675 cfg
.buckets
[THROTTLE_BPS_READ
].max
= arg
->bps_rd_max
;
2677 if (arg
->has_bps_wr_max
) {
2678 cfg
.buckets
[THROTTLE_BPS_WRITE
].max
= arg
->bps_wr_max
;
2680 if (arg
->has_iops_max
) {
2681 cfg
.buckets
[THROTTLE_OPS_TOTAL
].max
= arg
->iops_max
;
2683 if (arg
->has_iops_rd_max
) {
2684 cfg
.buckets
[THROTTLE_OPS_READ
].max
= arg
->iops_rd_max
;
2686 if (arg
->has_iops_wr_max
) {
2687 cfg
.buckets
[THROTTLE_OPS_WRITE
].max
= arg
->iops_wr_max
;
2690 if (arg
->has_bps_max_length
) {
2691 cfg
.buckets
[THROTTLE_BPS_TOTAL
].burst_length
= arg
->bps_max_length
;
2693 if (arg
->has_bps_rd_max_length
) {
2694 cfg
.buckets
[THROTTLE_BPS_READ
].burst_length
= arg
->bps_rd_max_length
;
2696 if (arg
->has_bps_wr_max_length
) {
2697 cfg
.buckets
[THROTTLE_BPS_WRITE
].burst_length
= arg
->bps_wr_max_length
;
2699 if (arg
->has_iops_max_length
) {
2700 cfg
.buckets
[THROTTLE_OPS_TOTAL
].burst_length
= arg
->iops_max_length
;
2702 if (arg
->has_iops_rd_max_length
) {
2703 cfg
.buckets
[THROTTLE_OPS_READ
].burst_length
= arg
->iops_rd_max_length
;
2705 if (arg
->has_iops_wr_max_length
) {
2706 cfg
.buckets
[THROTTLE_OPS_WRITE
].burst_length
= arg
->iops_wr_max_length
;
2709 if (arg
->has_iops_size
) {
2710 cfg
.op_size
= arg
->iops_size
;
2713 if (!throttle_is_valid(&cfg
, errp
)) {
2717 if (throttle_enabled(&cfg
)) {
2718 /* Enable I/O limits if they're not enabled yet, otherwise
2719 * just update the throttling group. */
2720 if (!blk_get_public(blk
)->throttle_state
) {
2721 blk_io_limits_enable(blk
,
2722 arg
->has_group
? arg
->group
: arg
->device
);
2723 } else if (arg
->has_group
) {
2724 blk_io_limits_update_group(blk
, arg
->group
);
2726 /* Set the new throttling configuration */
2727 blk_set_io_limits(blk
, &cfg
);
2728 } else if (blk_get_public(blk
)->throttle_state
) {
2729 /* If all throttling settings are set to 0, disable I/O limits */
2730 blk_io_limits_disable(blk
);
2734 aio_context_release(aio_context
);
2737 void qmp_block_dirty_bitmap_add(const char *node
, const char *name
,
2738 bool has_granularity
, uint32_t granularity
,
2741 AioContext
*aio_context
;
2742 BlockDriverState
*bs
;
2744 if (!name
|| name
[0] == '\0') {
2745 error_setg(errp
, "Bitmap name cannot be empty");
2749 bs
= bdrv_lookup_bs(node
, node
, errp
);
2754 aio_context
= bdrv_get_aio_context(bs
);
2755 aio_context_acquire(aio_context
);
2757 if (has_granularity
) {
2758 if (granularity
< 512 || !is_power_of_2(granularity
)) {
2759 error_setg(errp
, "Granularity must be power of 2 "
2760 "and at least 512");
2764 /* Default to cluster size, if available: */
2765 granularity
= bdrv_get_default_bitmap_granularity(bs
);
2768 bdrv_create_dirty_bitmap(bs
, granularity
, name
, errp
);
2771 aio_context_release(aio_context
);
2774 void qmp_block_dirty_bitmap_remove(const char *node
, const char *name
,
2777 AioContext
*aio_context
;
2778 BlockDriverState
*bs
;
2779 BdrvDirtyBitmap
*bitmap
;
2781 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, &aio_context
, errp
);
2782 if (!bitmap
|| !bs
) {
2786 if (bdrv_dirty_bitmap_frozen(bitmap
)) {
2788 "Bitmap '%s' is currently frozen and cannot be removed",
2792 bdrv_dirty_bitmap_make_anon(bitmap
);
2793 bdrv_release_dirty_bitmap(bs
, bitmap
);
2796 aio_context_release(aio_context
);
2800 * Completely clear a bitmap, for the purposes of synchronizing a bitmap
2801 * immediately after a full backup operation.
2803 void qmp_block_dirty_bitmap_clear(const char *node
, const char *name
,
2806 AioContext
*aio_context
;
2807 BdrvDirtyBitmap
*bitmap
;
2808 BlockDriverState
*bs
;
2810 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, &aio_context
, errp
);
2811 if (!bitmap
|| !bs
) {
2815 if (bdrv_dirty_bitmap_frozen(bitmap
)) {
2817 "Bitmap '%s' is currently frozen and cannot be modified",
2820 } else if (!bdrv_dirty_bitmap_enabled(bitmap
)) {
2822 "Bitmap '%s' is currently disabled and cannot be cleared",
2827 bdrv_clear_dirty_bitmap(bitmap
, NULL
);
2830 aio_context_release(aio_context
);
2833 void hmp_drive_del(Monitor
*mon
, const QDict
*qdict
)
2835 const char *id
= qdict_get_str(qdict
, "id");
2837 BlockDriverState
*bs
;
2838 AioContext
*aio_context
;
2839 Error
*local_err
= NULL
;
2841 bs
= bdrv_find_node(id
);
2843 qmp_x_blockdev_del(false, NULL
, true, id
, &local_err
);
2845 error_report_err(local_err
);
2850 blk
= blk_by_name(id
);
2852 error_report("Device '%s' not found", id
);
2856 if (!blk_legacy_dinfo(blk
)) {
2857 error_report("Deleting device added with blockdev-add"
2858 " is not supported");
2862 aio_context
= blk_get_aio_context(blk
);
2863 aio_context_acquire(aio_context
);
2867 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_DRIVE_DEL
, &local_err
)) {
2868 error_report_err(local_err
);
2869 aio_context_release(aio_context
);
2876 /* Make the BlockBackend and the attached BlockDriverState anonymous */
2877 monitor_remove_blk(blk
);
2879 /* If this BlockBackend has a device attached to it, its refcount will be
2880 * decremented when the device is removed; otherwise we have to do so here.
2882 if (blk_get_attached_dev(blk
)) {
2883 /* Further I/O must not pause the guest */
2884 blk_set_on_error(blk
, BLOCKDEV_ON_ERROR_REPORT
,
2885 BLOCKDEV_ON_ERROR_REPORT
);
2890 aio_context_release(aio_context
);
2893 void qmp_block_resize(bool has_device
, const char *device
,
2894 bool has_node_name
, const char *node_name
,
2895 int64_t size
, Error
**errp
)
2897 Error
*local_err
= NULL
;
2898 BlockDriverState
*bs
;
2899 AioContext
*aio_context
;
2902 bs
= bdrv_lookup_bs(has_device
? device
: NULL
,
2903 has_node_name
? node_name
: NULL
,
2906 error_propagate(errp
, local_err
);
2910 aio_context
= bdrv_get_aio_context(bs
);
2911 aio_context_acquire(aio_context
);
2913 if (!bdrv_is_first_non_filter(bs
)) {
2914 error_setg(errp
, QERR_FEATURE_DISABLED
, "resize");
2919 error_setg(errp
, QERR_INVALID_PARAMETER_VALUE
, "size", "a >0 size");
2923 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_RESIZE
, NULL
)) {
2924 error_setg(errp
, QERR_DEVICE_IN_USE
, device
);
2928 /* complete all in-flight operations before resizing the device */
2931 ret
= bdrv_truncate(bs
, size
);
2936 error_setg(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
2939 error_setg(errp
, QERR_UNSUPPORTED
);
2942 error_setg(errp
, "Device '%s' is read only", device
);
2945 error_setg(errp
, QERR_DEVICE_IN_USE
, device
);
2948 error_setg_errno(errp
, -ret
, "Could not resize");
2953 aio_context_release(aio_context
);
2956 static void block_job_cb(void *opaque
, int ret
)
2958 /* Note that this function may be executed from another AioContext besides
2959 * the QEMU main loop. If you need to access anything that assumes the
2960 * QEMU global mutex, use a BH or introduce a mutex.
2963 BlockDriverState
*bs
= opaque
;
2964 const char *msg
= NULL
;
2966 trace_block_job_cb(bs
, bs
->job
, ret
);
2971 msg
= strerror(-ret
);
2974 if (block_job_is_cancelled(bs
->job
)) {
2975 block_job_event_cancelled(bs
->job
);
2977 block_job_event_completed(bs
->job
, msg
);
2981 void qmp_block_stream(bool has_job_id
, const char *job_id
, const char *device
,
2982 bool has_base
, const char *base
,
2983 bool has_backing_file
, const char *backing_file
,
2984 bool has_speed
, int64_t speed
,
2985 bool has_on_error
, BlockdevOnError on_error
,
2988 BlockDriverState
*bs
;
2989 BlockDriverState
*base_bs
= NULL
;
2990 AioContext
*aio_context
;
2991 Error
*local_err
= NULL
;
2992 const char *base_name
= NULL
;
2994 if (!has_on_error
) {
2995 on_error
= BLOCKDEV_ON_ERROR_REPORT
;
2998 bs
= qmp_get_root_bs(device
, errp
);
3003 aio_context
= bdrv_get_aio_context(bs
);
3004 aio_context_acquire(aio_context
);
3006 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_STREAM
, errp
)) {
3011 base_bs
= bdrv_find_backing_image(bs
, base
);
3012 if (base_bs
== NULL
) {
3013 error_setg(errp
, QERR_BASE_NOT_FOUND
, base
);
3016 assert(bdrv_get_aio_context(base_bs
) == aio_context
);
3020 /* if we are streaming the entire chain, the result will have no backing
3021 * file, and specifying one is therefore an error */
3022 if (base_bs
== NULL
&& has_backing_file
) {
3023 error_setg(errp
, "backing file specified, but streaming the "
3028 /* backing_file string overrides base bs filename */
3029 base_name
= has_backing_file
? backing_file
: base_name
;
3031 stream_start(has_job_id
? job_id
: NULL
, bs
, base_bs
, base_name
,
3032 has_speed
? speed
: 0, on_error
, block_job_cb
, bs
, &local_err
);
3034 error_propagate(errp
, local_err
);
3038 trace_qmp_block_stream(bs
, bs
->job
);
3041 aio_context_release(aio_context
);
3044 void qmp_block_commit(bool has_job_id
, const char *job_id
, const char *device
,
3045 bool has_base
, const char *base
,
3046 bool has_top
, const char *top
,
3047 bool has_backing_file
, const char *backing_file
,
3048 bool has_speed
, int64_t speed
,
3051 BlockDriverState
*bs
;
3052 BlockDriverState
*base_bs
, *top_bs
;
3053 AioContext
*aio_context
;
3054 Error
*local_err
= NULL
;
3055 /* This will be part of the QMP command, if/when the
3056 * BlockdevOnError change for blkmirror makes it in
3058 BlockdevOnError on_error
= BLOCKDEV_ON_ERROR_REPORT
;
3065 * libvirt relies on the DeviceNotFound error class in order to probe for
3066 * live commit feature versions; for this to work, we must make sure to
3067 * perform the device lookup before any generic errors that may occur in a
3068 * scenario in which all optional arguments are omitted. */
3069 bs
= qmp_get_root_bs(device
, &local_err
);
3071 bs
= bdrv_lookup_bs(device
, device
, NULL
);
3073 error_free(local_err
);
3074 error_set(errp
, ERROR_CLASS_DEVICE_NOT_FOUND
,
3075 "Device '%s' not found", device
);
3077 error_propagate(errp
, local_err
);
3082 aio_context
= bdrv_get_aio_context(bs
);
3083 aio_context_acquire(aio_context
);
3085 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_COMMIT_SOURCE
, errp
)) {
3089 /* default top_bs is the active layer */
3092 if (has_top
&& top
) {
3093 if (strcmp(bs
->filename
, top
) != 0) {
3094 top_bs
= bdrv_find_backing_image(bs
, top
);
3098 if (top_bs
== NULL
) {
3099 error_setg(errp
, "Top image file %s not found", top
? top
: "NULL");
3103 assert(bdrv_get_aio_context(top_bs
) == aio_context
);
3105 if (has_base
&& base
) {
3106 base_bs
= bdrv_find_backing_image(top_bs
, base
);
3108 base_bs
= bdrv_find_base(top_bs
);
3111 if (base_bs
== NULL
) {
3112 error_setg(errp
, QERR_BASE_NOT_FOUND
, base
? base
: "NULL");
3116 assert(bdrv_get_aio_context(base_bs
) == aio_context
);
3118 if (bdrv_op_is_blocked(base_bs
, BLOCK_OP_TYPE_COMMIT_TARGET
, errp
)) {
3122 /* Do not allow attempts to commit an image into itself */
3123 if (top_bs
== base_bs
) {
3124 error_setg(errp
, "cannot commit an image into itself");
3129 if (has_backing_file
) {
3130 error_setg(errp
, "'backing-file' specified,"
3131 " but 'top' is the active layer");
3134 commit_active_start(has_job_id
? job_id
: NULL
, bs
, base_bs
, speed
,
3135 on_error
, block_job_cb
, bs
, &local_err
, false);
3137 commit_start(has_job_id
? job_id
: NULL
, bs
, base_bs
, top_bs
, speed
,
3138 on_error
, block_job_cb
, bs
,
3139 has_backing_file
? backing_file
: NULL
, &local_err
);
3141 if (local_err
!= NULL
) {
3142 error_propagate(errp
, local_err
);
3147 aio_context_release(aio_context
);
3150 static void do_drive_backup(DriveBackup
*backup
, BlockJobTxn
*txn
, Error
**errp
)
3152 BlockDriverState
*bs
;
3153 BlockDriverState
*target_bs
;
3154 BlockDriverState
*source
= NULL
;
3155 BdrvDirtyBitmap
*bmap
= NULL
;
3156 AioContext
*aio_context
;
3157 QDict
*options
= NULL
;
3158 Error
*local_err
= NULL
;
3162 if (!backup
->has_speed
) {
3165 if (!backup
->has_on_source_error
) {
3166 backup
->on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
3168 if (!backup
->has_on_target_error
) {
3169 backup
->on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
3171 if (!backup
->has_mode
) {
3172 backup
->mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
3174 if (!backup
->has_job_id
) {
3175 backup
->job_id
= NULL
;
3177 if (!backup
->has_compress
) {
3178 backup
->compress
= false;
3181 bs
= qmp_get_root_bs(backup
->device
, errp
);
3186 aio_context
= bdrv_get_aio_context(bs
);
3187 aio_context_acquire(aio_context
);
3189 if (!backup
->has_format
) {
3190 backup
->format
= backup
->mode
== NEW_IMAGE_MODE_EXISTING
?
3191 NULL
: (char*) bs
->drv
->format_name
;
3194 /* Early check to avoid creating target */
3195 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_BACKUP_SOURCE
, errp
)) {
3199 flags
= bs
->open_flags
| BDRV_O_RDWR
;
3201 /* See if we have a backing HD we can use to create our new image
3203 if (backup
->sync
== MIRROR_SYNC_MODE_TOP
) {
3204 source
= backing_bs(bs
);
3206 backup
->sync
= MIRROR_SYNC_MODE_FULL
;
3209 if (backup
->sync
== MIRROR_SYNC_MODE_NONE
) {
3213 size
= bdrv_getlength(bs
);
3215 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
3219 if (backup
->mode
!= NEW_IMAGE_MODE_EXISTING
) {
3220 assert(backup
->format
);
3222 bdrv_img_create(backup
->target
, backup
->format
, source
->filename
,
3223 source
->drv
->format_name
, NULL
,
3224 size
, flags
, &local_err
, false);
3226 bdrv_img_create(backup
->target
, backup
->format
, NULL
, NULL
, NULL
,
3227 size
, flags
, &local_err
, false);
3232 error_propagate(errp
, local_err
);
3236 if (backup
->format
) {
3237 options
= qdict_new();
3238 qdict_put(options
, "driver", qstring_from_str(backup
->format
));
3241 target_bs
= bdrv_open(backup
->target
, NULL
, options
, flags
, errp
);
3246 bdrv_set_aio_context(target_bs
, aio_context
);
3248 if (backup
->has_bitmap
) {
3249 bmap
= bdrv_find_dirty_bitmap(bs
, backup
->bitmap
);
3251 error_setg(errp
, "Bitmap '%s' could not be found", backup
->bitmap
);
3252 bdrv_unref(target_bs
);
3257 backup_start(backup
->job_id
, bs
, target_bs
, backup
->speed
, backup
->sync
,
3258 bmap
, backup
->compress
, backup
->on_source_error
,
3259 backup
->on_target_error
, block_job_cb
, bs
, txn
, &local_err
);
3260 bdrv_unref(target_bs
);
3261 if (local_err
!= NULL
) {
3262 error_propagate(errp
, local_err
);
3267 aio_context_release(aio_context
);
3270 void qmp_drive_backup(DriveBackup
*arg
, Error
**errp
)
3272 return do_drive_backup(arg
, NULL
, errp
);
3275 BlockDeviceInfoList
*qmp_query_named_block_nodes(Error
**errp
)
3277 return bdrv_named_nodes_list(errp
);
3280 void do_blockdev_backup(BlockdevBackup
*backup
, BlockJobTxn
*txn
, Error
**errp
)
3282 BlockDriverState
*bs
;
3283 BlockDriverState
*target_bs
;
3284 Error
*local_err
= NULL
;
3285 AioContext
*aio_context
;
3287 if (!backup
->has_speed
) {
3290 if (!backup
->has_on_source_error
) {
3291 backup
->on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
3293 if (!backup
->has_on_target_error
) {
3294 backup
->on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
3296 if (!backup
->has_job_id
) {
3297 backup
->job_id
= NULL
;
3299 if (!backup
->has_compress
) {
3300 backup
->compress
= false;
3303 bs
= qmp_get_root_bs(backup
->device
, errp
);
3308 aio_context
= bdrv_get_aio_context(bs
);
3309 aio_context_acquire(aio_context
);
3311 target_bs
= bdrv_lookup_bs(backup
->target
, backup
->target
, errp
);
3316 if (bdrv_get_aio_context(target_bs
) != aio_context
) {
3317 if (!bdrv_has_blk(target_bs
)) {
3318 /* The target BDS is not attached, we can safely move it to another
3320 bdrv_set_aio_context(target_bs
, aio_context
);
3322 error_setg(errp
, "Target is attached to a different thread from "
3327 backup_start(backup
->job_id
, bs
, target_bs
, backup
->speed
, backup
->sync
,
3328 NULL
, backup
->compress
, backup
->on_source_error
,
3329 backup
->on_target_error
, block_job_cb
, bs
, txn
, &local_err
);
3330 if (local_err
!= NULL
) {
3331 error_propagate(errp
, local_err
);
3334 aio_context_release(aio_context
);
3337 void qmp_blockdev_backup(BlockdevBackup
*arg
, Error
**errp
)
3339 do_blockdev_backup(arg
, NULL
, errp
);
3342 /* Parameter check and block job starting for drive mirroring.
3343 * Caller should hold @device and @target's aio context (must be the same).
3345 static void blockdev_mirror_common(const char *job_id
, BlockDriverState
*bs
,
3346 BlockDriverState
*target
,
3347 bool has_replaces
, const char *replaces
,
3348 enum MirrorSyncMode sync
,
3349 BlockMirrorBackingMode backing_mode
,
3350 bool has_speed
, int64_t speed
,
3351 bool has_granularity
, uint32_t granularity
,
3352 bool has_buf_size
, int64_t buf_size
,
3353 bool has_on_source_error
,
3354 BlockdevOnError on_source_error
,
3355 bool has_on_target_error
,
3356 BlockdevOnError on_target_error
,
3357 bool has_unmap
, bool unmap
,
3364 if (!has_on_source_error
) {
3365 on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
3367 if (!has_on_target_error
) {
3368 on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
3370 if (!has_granularity
) {
3373 if (!has_buf_size
) {
3380 if (granularity
!= 0 && (granularity
< 512 || granularity
> 1048576 * 64)) {
3381 error_setg(errp
, QERR_INVALID_PARAMETER_VALUE
, "granularity",
3382 "a value in range [512B, 64MB]");
3385 if (granularity
& (granularity
- 1)) {
3386 error_setg(errp
, QERR_INVALID_PARAMETER_VALUE
, "granularity",
3391 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_MIRROR_SOURCE
, errp
)) {
3394 if (bdrv_op_is_blocked(target
, BLOCK_OP_TYPE_MIRROR_TARGET
, errp
)) {
3398 if (!bs
->backing
&& sync
== MIRROR_SYNC_MODE_TOP
) {
3399 sync
= MIRROR_SYNC_MODE_FULL
;
3402 /* pass the node name to replace to mirror start since it's loose coupling
3403 * and will allow to check whether the node still exist at mirror completion
3405 mirror_start(job_id
, bs
, target
,
3406 has_replaces
? replaces
: NULL
,
3407 speed
, granularity
, buf_size
, sync
, backing_mode
,
3408 on_source_error
, on_target_error
, unmap
,
3409 block_job_cb
, bs
, errp
);
3412 void qmp_drive_mirror(DriveMirror
*arg
, Error
**errp
)
3414 BlockDriverState
*bs
;
3415 BlockDriverState
*source
, *target_bs
;
3416 AioContext
*aio_context
;
3417 BlockMirrorBackingMode backing_mode
;
3418 Error
*local_err
= NULL
;
3419 QDict
*options
= NULL
;
3422 const char *format
= arg
->format
;
3424 bs
= qmp_get_root_bs(arg
->device
, errp
);
3429 aio_context
= bdrv_get_aio_context(bs
);
3430 aio_context_acquire(aio_context
);
3432 if (!arg
->has_mode
) {
3433 arg
->mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
3436 if (!arg
->has_format
) {
3437 format
= (arg
->mode
== NEW_IMAGE_MODE_EXISTING
3438 ? NULL
: bs
->drv
->format_name
);
3441 flags
= bs
->open_flags
| BDRV_O_RDWR
;
3442 source
= backing_bs(bs
);
3443 if (!source
&& arg
->sync
== MIRROR_SYNC_MODE_TOP
) {
3444 arg
->sync
= MIRROR_SYNC_MODE_FULL
;
3446 if (arg
->sync
== MIRROR_SYNC_MODE_NONE
) {
3450 size
= bdrv_getlength(bs
);
3452 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
3456 if (arg
->has_replaces
) {
3457 BlockDriverState
*to_replace_bs
;
3458 AioContext
*replace_aio_context
;
3459 int64_t replace_size
;
3461 if (!arg
->has_node_name
) {
3462 error_setg(errp
, "a node-name must be provided when replacing a"
3463 " named node of the graph");
3467 to_replace_bs
= check_to_replace_node(bs
, arg
->replaces
, &local_err
);
3469 if (!to_replace_bs
) {
3470 error_propagate(errp
, local_err
);
3474 replace_aio_context
= bdrv_get_aio_context(to_replace_bs
);
3475 aio_context_acquire(replace_aio_context
);
3476 replace_size
= bdrv_getlength(to_replace_bs
);
3477 aio_context_release(replace_aio_context
);
3479 if (size
!= replace_size
) {
3480 error_setg(errp
, "cannot replace image with a mirror image of "
3486 if (arg
->mode
== NEW_IMAGE_MODE_ABSOLUTE_PATHS
) {
3487 backing_mode
= MIRROR_SOURCE_BACKING_CHAIN
;
3489 backing_mode
= MIRROR_OPEN_BACKING_CHAIN
;
3492 if ((arg
->sync
== MIRROR_SYNC_MODE_FULL
|| !source
)
3493 && arg
->mode
!= NEW_IMAGE_MODE_EXISTING
)
3495 /* create new image w/o backing file */
3497 bdrv_img_create(arg
->target
, format
,
3498 NULL
, NULL
, NULL
, size
, flags
, &local_err
, false);
3500 switch (arg
->mode
) {
3501 case NEW_IMAGE_MODE_EXISTING
:
3503 case NEW_IMAGE_MODE_ABSOLUTE_PATHS
:
3504 /* create new image with backing file */
3505 bdrv_img_create(arg
->target
, format
,
3507 source
->drv
->format_name
,
3508 NULL
, size
, flags
, &local_err
, false);
3516 error_propagate(errp
, local_err
);
3520 options
= qdict_new();
3521 if (arg
->has_node_name
) {
3522 qdict_put(options
, "node-name", qstring_from_str(arg
->node_name
));
3525 qdict_put(options
, "driver", qstring_from_str(format
));
3528 /* Mirroring takes care of copy-on-write using the source's backing
3531 target_bs
= bdrv_open(arg
->target
, NULL
, options
,
3532 flags
| BDRV_O_NO_BACKING
, errp
);
3537 bdrv_set_aio_context(target_bs
, aio_context
);
3539 blockdev_mirror_common(arg
->has_job_id
? arg
->job_id
: NULL
, bs
, target_bs
,
3540 arg
->has_replaces
, arg
->replaces
, arg
->sync
,
3541 backing_mode
, arg
->has_speed
, arg
->speed
,
3542 arg
->has_granularity
, arg
->granularity
,
3543 arg
->has_buf_size
, arg
->buf_size
,
3544 arg
->has_on_source_error
, arg
->on_source_error
,
3545 arg
->has_on_target_error
, arg
->on_target_error
,
3546 arg
->has_unmap
, arg
->unmap
,
3548 bdrv_unref(target_bs
);
3549 error_propagate(errp
, local_err
);
3551 aio_context_release(aio_context
);
3554 void qmp_blockdev_mirror(bool has_job_id
, const char *job_id
,
3555 const char *device
, const char *target
,
3556 bool has_replaces
, const char *replaces
,
3557 MirrorSyncMode sync
,
3558 bool has_speed
, int64_t speed
,
3559 bool has_granularity
, uint32_t granularity
,
3560 bool has_buf_size
, int64_t buf_size
,
3561 bool has_on_source_error
,
3562 BlockdevOnError on_source_error
,
3563 bool has_on_target_error
,
3564 BlockdevOnError on_target_error
,
3567 BlockDriverState
*bs
;
3568 BlockDriverState
*target_bs
;
3569 AioContext
*aio_context
;
3570 BlockMirrorBackingMode backing_mode
= MIRROR_LEAVE_BACKING_CHAIN
;
3571 Error
*local_err
= NULL
;
3573 bs
= qmp_get_root_bs(device
, errp
);
3578 target_bs
= bdrv_lookup_bs(target
, target
, errp
);
3583 aio_context
= bdrv_get_aio_context(bs
);
3584 aio_context_acquire(aio_context
);
3586 bdrv_set_aio_context(target_bs
, aio_context
);
3588 blockdev_mirror_common(has_job_id
? job_id
: NULL
, bs
, target_bs
,
3589 has_replaces
, replaces
, sync
, backing_mode
,
3591 has_granularity
, granularity
,
3592 has_buf_size
, buf_size
,
3593 has_on_source_error
, on_source_error
,
3594 has_on_target_error
, on_target_error
,
3597 error_propagate(errp
, local_err
);
3599 aio_context_release(aio_context
);
3602 /* Get a block job using its ID and acquire its AioContext */
3603 static BlockJob
*find_block_job(const char *id
, AioContext
**aio_context
,
3610 *aio_context
= NULL
;
3612 job
= block_job_get(id
);
3615 error_set(errp
, ERROR_CLASS_DEVICE_NOT_ACTIVE
,
3616 "Block job '%s' not found", id
);
3620 *aio_context
= blk_get_aio_context(job
->blk
);
3621 aio_context_acquire(*aio_context
);
3626 void qmp_block_job_set_speed(const char *device
, int64_t speed
, Error
**errp
)
3628 AioContext
*aio_context
;
3629 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
3635 block_job_set_speed(job
, speed
, errp
);
3636 aio_context_release(aio_context
);
3639 void qmp_block_job_cancel(const char *device
,
3640 bool has_force
, bool force
, Error
**errp
)
3642 AioContext
*aio_context
;
3643 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
3653 if (job
->user_paused
&& !force
) {
3654 error_setg(errp
, "The block job for device '%s' is currently paused",
3659 trace_qmp_block_job_cancel(job
);
3660 block_job_cancel(job
);
3662 aio_context_release(aio_context
);
3665 void qmp_block_job_pause(const char *device
, Error
**errp
)
3667 AioContext
*aio_context
;
3668 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
3670 if (!job
|| job
->user_paused
) {
3674 job
->user_paused
= true;
3675 trace_qmp_block_job_pause(job
);
3676 block_job_pause(job
);
3677 aio_context_release(aio_context
);
3680 void qmp_block_job_resume(const char *device
, Error
**errp
)
3682 AioContext
*aio_context
;
3683 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
3685 if (!job
|| !job
->user_paused
) {
3689 job
->user_paused
= false;
3690 trace_qmp_block_job_resume(job
);
3691 block_job_iostatus_reset(job
);
3692 block_job_resume(job
);
3693 aio_context_release(aio_context
);
3696 void qmp_block_job_complete(const char *device
, Error
**errp
)
3698 AioContext
*aio_context
;
3699 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
3705 trace_qmp_block_job_complete(job
);
3706 block_job_complete(job
, errp
);
3707 aio_context_release(aio_context
);
3710 void qmp_change_backing_file(const char *device
,
3711 const char *image_node_name
,
3712 const char *backing_file
,
3715 BlockDriverState
*bs
= NULL
;
3716 AioContext
*aio_context
;
3717 BlockDriverState
*image_bs
= NULL
;
3718 Error
*local_err
= NULL
;
3723 bs
= qmp_get_root_bs(device
, errp
);
3728 aio_context
= bdrv_get_aio_context(bs
);
3729 aio_context_acquire(aio_context
);
3731 image_bs
= bdrv_lookup_bs(NULL
, image_node_name
, &local_err
);
3733 error_propagate(errp
, local_err
);
3738 error_setg(errp
, "image file not found");
3742 if (bdrv_find_base(image_bs
) == image_bs
) {
3743 error_setg(errp
, "not allowing backing file change on an image "
3744 "without a backing file");
3748 /* even though we are not necessarily operating on bs, we need it to
3749 * determine if block ops are currently prohibited on the chain */
3750 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_CHANGE
, errp
)) {
3754 /* final sanity check */
3755 if (!bdrv_chain_contains(bs
, image_bs
)) {
3756 error_setg(errp
, "'%s' and image file are not in the same chain",
3761 /* if not r/w, reopen to make r/w */
3762 open_flags
= image_bs
->open_flags
;
3763 ro
= bdrv_is_read_only(image_bs
);
3766 bdrv_reopen(image_bs
, open_flags
| BDRV_O_RDWR
, &local_err
);
3768 error_propagate(errp
, local_err
);
3773 ret
= bdrv_change_backing_file(image_bs
, backing_file
,
3774 image_bs
->drv
? image_bs
->drv
->format_name
: "");
3777 error_setg_errno(errp
, -ret
, "Could not change backing file to '%s'",
3779 /* don't exit here, so we can try to restore open flags if
3784 bdrv_reopen(image_bs
, open_flags
, &local_err
);
3785 error_propagate(errp
, local_err
);
3789 aio_context_release(aio_context
);
3792 void hmp_drive_add_node(Monitor
*mon
, const char *optstr
)
3796 Error
*local_err
= NULL
;
3798 opts
= qemu_opts_parse_noisily(&qemu_drive_opts
, optstr
, false);
3803 qdict
= qemu_opts_to_qdict(opts
, NULL
);
3805 if (!qdict_get_try_str(qdict
, "node-name")) {
3807 error_report("'node-name' needs to be specified");
3811 BlockDriverState
*bs
= bds_tree_init(qdict
, &local_err
);
3813 error_report_err(local_err
);
3817 QTAILQ_INSERT_TAIL(&monitor_bdrv_states
, bs
, monitor_list
);
3820 qemu_opts_del(opts
);
3823 void qmp_blockdev_add(BlockdevOptions
*options
, Error
**errp
)
3825 BlockDriverState
*bs
;
3826 BlockBackend
*blk
= NULL
;
3828 Visitor
*v
= qmp_output_visitor_new(&obj
);
3830 Error
*local_err
= NULL
;
3832 /* TODO Sort it out in raw-posix and drive_new(): Reject aio=native with
3833 * cache.direct=false instead of silently switching to aio=threads, except
3834 * when called from drive_new().
3836 * For now, simply forbidding the combination for all drivers will do. */
3837 if (options
->has_aio
&& options
->aio
== BLOCKDEV_AIO_OPTIONS_NATIVE
) {
3838 bool direct
= options
->has_cache
&&
3839 options
->cache
->has_direct
&&
3840 options
->cache
->direct
;
3842 error_setg(errp
, "aio=native requires cache.direct=true");
3847 visit_type_BlockdevOptions(v
, NULL
, &options
, &local_err
);
3849 error_propagate(errp
, local_err
);
3853 visit_complete(v
, &obj
);
3854 qdict
= qobject_to_qdict(obj
);
3856 qdict_flatten(qdict
);
3858 if (options
->has_id
) {
3859 blk
= blockdev_init(NULL
, qdict
, &local_err
);
3861 error_propagate(errp
, local_err
);
3867 if (!qdict_get_try_str(qdict
, "node-name")) {
3868 error_setg(errp
, "'id' and/or 'node-name' need to be specified for "
3873 bs
= bds_tree_init(qdict
, errp
);
3878 QTAILQ_INSERT_TAIL(&monitor_bdrv_states
, bs
, monitor_list
);
3881 if (bs
&& bdrv_key_required(bs
)) {
3883 monitor_remove_blk(blk
);
3886 QTAILQ_REMOVE(&monitor_bdrv_states
, bs
, monitor_list
);
3889 error_setg(errp
, "blockdev-add doesn't support encrypted devices");
3897 void qmp_x_blockdev_del(bool has_id
, const char *id
,
3898 bool has_node_name
, const char *node_name
, Error
**errp
)
3900 AioContext
*aio_context
;
3902 BlockDriverState
*bs
;
3904 if (has_id
&& has_node_name
) {
3905 error_setg(errp
, "Only one of id and node-name must be specified");
3907 } else if (!has_id
&& !has_node_name
) {
3908 error_setg(errp
, "No block device specified");
3913 /* blk_by_name() never returns a BB that is not owned by the monitor */
3914 blk
= blk_by_name(id
);
3916 error_setg(errp
, "Cannot find block backend %s", id
);
3919 if (blk_legacy_dinfo(blk
)) {
3920 error_setg(errp
, "Deleting block backend added with drive-add"
3921 " is not supported");
3924 if (blk_get_refcnt(blk
) > 1) {
3925 error_setg(errp
, "Block backend %s is in use", id
);
3929 aio_context
= blk_get_aio_context(blk
);
3932 bs
= bdrv_find_node(node_name
);
3934 error_setg(errp
, "Cannot find node %s", node_name
);
3937 if (bdrv_has_blk(bs
)) {
3938 error_setg(errp
, "Node %s is in use by %s",
3939 node_name
, bdrv_get_parent_name(bs
));
3942 aio_context
= bdrv_get_aio_context(bs
);
3945 aio_context_acquire(aio_context
);
3948 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_DRIVE_DEL
, errp
)) {
3952 if (!blk
&& !QTAILQ_IN_USE(bs
, monitor_list
)) {
3953 error_setg(errp
, "Node %s is not owned by the monitor",
3958 if (bs
->refcnt
> 1) {
3959 error_setg(errp
, "Block device %s is in use",
3960 bdrv_get_device_or_node_name(bs
));
3966 monitor_remove_blk(blk
);
3969 QTAILQ_REMOVE(&monitor_bdrv_states
, bs
, monitor_list
);
3974 aio_context_release(aio_context
);
3977 static BdrvChild
*bdrv_find_child(BlockDriverState
*parent_bs
,
3978 const char *child_name
)
3982 QLIST_FOREACH(child
, &parent_bs
->children
, next
) {
3983 if (strcmp(child
->name
, child_name
) == 0) {
3991 void qmp_x_blockdev_change(const char *parent
, bool has_child
,
3992 const char *child
, bool has_node
,
3993 const char *node
, Error
**errp
)
3995 BlockDriverState
*parent_bs
, *new_bs
= NULL
;
3998 parent_bs
= bdrv_lookup_bs(parent
, parent
, errp
);
4003 if (has_child
== has_node
) {
4005 error_setg(errp
, "The parameters child and node are in conflict");
4007 error_setg(errp
, "Either child or node must be specified");
4013 p_child
= bdrv_find_child(parent_bs
, child
);
4015 error_setg(errp
, "Node '%s' does not have child '%s'",
4019 bdrv_del_child(parent_bs
, p_child
, errp
);
4023 new_bs
= bdrv_find_node(node
);
4025 error_setg(errp
, "Node '%s' not found", node
);
4028 bdrv_add_child(parent_bs
, new_bs
, errp
);
4032 BlockJobInfoList
*qmp_query_block_jobs(Error
**errp
)
4034 BlockJobInfoList
*head
= NULL
, **p_next
= &head
;
4037 for (job
= block_job_next(NULL
); job
; job
= block_job_next(job
)) {
4038 BlockJobInfoList
*elem
= g_new0(BlockJobInfoList
, 1);
4039 AioContext
*aio_context
= blk_get_aio_context(job
->blk
);
4041 aio_context_acquire(aio_context
);
4042 elem
->value
= block_job_query(job
);
4043 aio_context_release(aio_context
);
4046 p_next
= &elem
->next
;
4052 QemuOptsList qemu_common_drive_opts
= {
4054 .head
= QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts
.head
),
4058 .type
= QEMU_OPT_BOOL
,
4059 .help
= "enable/disable snapshot mode",
4062 .type
= QEMU_OPT_STRING
,
4063 .help
= "discard operation (ignore/off, unmap/on)",
4066 .type
= QEMU_OPT_STRING
,
4067 .help
= "host AIO implementation (threads, native)",
4069 .name
= BDRV_OPT_CACHE_WB
,
4070 .type
= QEMU_OPT_BOOL
,
4071 .help
= "Enable writeback mode",
4074 .type
= QEMU_OPT_STRING
,
4075 .help
= "disk format (raw, qcow2, ...)",
4078 .type
= QEMU_OPT_STRING
,
4079 .help
= "read error action",
4082 .type
= QEMU_OPT_STRING
,
4083 .help
= "write error action",
4085 .name
= BDRV_OPT_READ_ONLY
,
4086 .type
= QEMU_OPT_BOOL
,
4087 .help
= "open drive file as read-only",
4089 .name
= "throttling.iops-total",
4090 .type
= QEMU_OPT_NUMBER
,
4091 .help
= "limit total I/O operations per second",
4093 .name
= "throttling.iops-read",
4094 .type
= QEMU_OPT_NUMBER
,
4095 .help
= "limit read operations per second",
4097 .name
= "throttling.iops-write",
4098 .type
= QEMU_OPT_NUMBER
,
4099 .help
= "limit write operations per second",
4101 .name
= "throttling.bps-total",
4102 .type
= QEMU_OPT_NUMBER
,
4103 .help
= "limit total bytes per second",
4105 .name
= "throttling.bps-read",
4106 .type
= QEMU_OPT_NUMBER
,
4107 .help
= "limit read bytes per second",
4109 .name
= "throttling.bps-write",
4110 .type
= QEMU_OPT_NUMBER
,
4111 .help
= "limit write bytes per second",
4113 .name
= "throttling.iops-total-max",
4114 .type
= QEMU_OPT_NUMBER
,
4115 .help
= "I/O operations burst",
4117 .name
= "throttling.iops-read-max",
4118 .type
= QEMU_OPT_NUMBER
,
4119 .help
= "I/O operations read burst",
4121 .name
= "throttling.iops-write-max",
4122 .type
= QEMU_OPT_NUMBER
,
4123 .help
= "I/O operations write burst",
4125 .name
= "throttling.bps-total-max",
4126 .type
= QEMU_OPT_NUMBER
,
4127 .help
= "total bytes burst",
4129 .name
= "throttling.bps-read-max",
4130 .type
= QEMU_OPT_NUMBER
,
4131 .help
= "total bytes read burst",
4133 .name
= "throttling.bps-write-max",
4134 .type
= QEMU_OPT_NUMBER
,
4135 .help
= "total bytes write burst",
4137 .name
= "throttling.iops-total-max-length",
4138 .type
= QEMU_OPT_NUMBER
,
4139 .help
= "length of the iops-total-max burst period, in seconds",
4141 .name
= "throttling.iops-read-max-length",
4142 .type
= QEMU_OPT_NUMBER
,
4143 .help
= "length of the iops-read-max burst period, in seconds",
4145 .name
= "throttling.iops-write-max-length",
4146 .type
= QEMU_OPT_NUMBER
,
4147 .help
= "length of the iops-write-max burst period, in seconds",
4149 .name
= "throttling.bps-total-max-length",
4150 .type
= QEMU_OPT_NUMBER
,
4151 .help
= "length of the bps-total-max burst period, in seconds",
4153 .name
= "throttling.bps-read-max-length",
4154 .type
= QEMU_OPT_NUMBER
,
4155 .help
= "length of the bps-read-max burst period, in seconds",
4157 .name
= "throttling.bps-write-max-length",
4158 .type
= QEMU_OPT_NUMBER
,
4159 .help
= "length of the bps-write-max burst period, in seconds",
4161 .name
= "throttling.iops-size",
4162 .type
= QEMU_OPT_NUMBER
,
4163 .help
= "when limiting by iops max size of an I/O in bytes",
4165 .name
= "throttling.group",
4166 .type
= QEMU_OPT_STRING
,
4167 .help
= "name of the block throttling group",
4169 .name
= "copy-on-read",
4170 .type
= QEMU_OPT_BOOL
,
4171 .help
= "copy read data from backing file into image file",
4173 .name
= "detect-zeroes",
4174 .type
= QEMU_OPT_STRING
,
4175 .help
= "try to optimize zero writes (off, on, unmap)",
4177 .name
= "stats-account-invalid",
4178 .type
= QEMU_OPT_BOOL
,
4179 .help
= "whether to account for invalid I/O operations "
4180 "in the statistics",
4182 .name
= "stats-account-failed",
4183 .type
= QEMU_OPT_BOOL
,
4184 .help
= "whether to account for failed I/O operations "
4185 "in the statistics",
4187 { /* end of list */ }
4191 static QemuOptsList qemu_root_bds_opts
= {
4193 .head
= QTAILQ_HEAD_INITIALIZER(qemu_root_bds_opts
.head
),
4197 .type
= QEMU_OPT_STRING
,
4198 .help
= "discard operation (ignore/off, unmap/on)",
4201 .type
= QEMU_OPT_STRING
,
4202 .help
= "host AIO implementation (threads, native)",
4204 .name
= "copy-on-read",
4205 .type
= QEMU_OPT_BOOL
,
4206 .help
= "copy read data from backing file into image file",
4208 .name
= "detect-zeroes",
4209 .type
= QEMU_OPT_STRING
,
4210 .help
= "try to optimize zero writes (off, on, unmap)",
4212 { /* end of list */ }
4216 QemuOptsList qemu_drive_opts
= {
4218 .head
= QTAILQ_HEAD_INITIALIZER(qemu_drive_opts
.head
),
4221 * no elements => accept any params
4222 * validation will happen later
4224 { /* end of list */ }