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/qdict.h"
39 #include "block/throttle-groups.h"
40 #include "monitor/monitor.h"
41 #include "qemu/error-report.h"
42 #include "qemu/option.h"
43 #include "qemu/config-file.h"
44 #include "qapi/qapi-commands-block.h"
45 #include "qapi/qapi-commands-transaction.h"
46 #include "qapi/qapi-visit-block-core.h"
47 #include "qapi/qmp/qdict.h"
48 #include "qapi/qmp/qnum.h"
49 #include "qapi/qmp/qstring.h"
50 #include "qapi/error.h"
51 #include "qapi/qmp/qerror.h"
52 #include "qapi/qmp/qlist.h"
53 #include "qapi/qobject-output-visitor.h"
54 #include "sysemu/sysemu.h"
55 #include "sysemu/iothread.h"
56 #include "block/block_int.h"
57 #include "block/trace.h"
58 #include "sysemu/arch_init.h"
59 #include "sysemu/qtest.h"
60 #include "qemu/cutils.h"
61 #include "qemu/help_option.h"
62 #include "qemu/throttle-options.h"
64 static QTAILQ_HEAD(, BlockDriverState
) monitor_bdrv_states
=
65 QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states
);
67 static int do_open_tray(const char *blk_name
, const char *qdev_id
,
68 bool force
, Error
**errp
);
69 static void blockdev_remove_medium(bool has_device
, const char *device
,
70 bool has_id
, const char *id
, Error
**errp
);
71 static void blockdev_insert_medium(bool has_device
, const char *device
,
72 bool has_id
, const char *id
,
73 const char *node_name
, Error
**errp
);
75 static const char *const if_name
[IF_COUNT
] = {
79 [IF_FLOPPY
] = "floppy",
80 [IF_PFLASH
] = "pflash",
83 [IF_VIRTIO
] = "virtio",
87 static int if_max_devs
[IF_COUNT
] = {
89 * Do not change these numbers! They govern how drive option
90 * index maps to unit and bus. That mapping is ABI.
92 * All controllers used to implement if=T drives need to support
93 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
94 * Otherwise, some index values map to "impossible" bus, unit
97 * For instance, if you change [IF_SCSI] to 255, -drive
98 * if=scsi,index=12 no longer means bus=1,unit=5, but
99 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
100 * the drive can't be set up. Regression.
107 * Boards may call this to offer board-by-board overrides
108 * of the default, global values.
110 void override_max_devs(BlockInterfaceType type
, int max_devs
)
119 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
120 dinfo
= blk_legacy_dinfo(blk
);
121 if (dinfo
->type
== type
) {
122 fprintf(stderr
, "Cannot override units-per-bus property of"
123 " the %s interface, because a drive of that type has"
124 " already been added.\n", if_name
[type
]);
125 g_assert_not_reached();
129 if_max_devs
[type
] = max_devs
;
133 * We automatically delete the drive when a device using it gets
134 * unplugged. Questionable feature, but we can't just drop it.
135 * Device models call blockdev_mark_auto_del() to schedule the
136 * automatic deletion, and generic qdev code calls blockdev_auto_del()
137 * when deletion is actually safe.
139 void blockdev_mark_auto_del(BlockBackend
*blk
)
141 DriveInfo
*dinfo
= blk_legacy_dinfo(blk
);
142 BlockDriverState
*bs
= blk_bs(blk
);
143 AioContext
*aio_context
;
150 aio_context
= bdrv_get_aio_context(bs
);
151 aio_context_acquire(aio_context
);
154 job_cancel(&bs
->job
->job
, false);
157 aio_context_release(aio_context
);
163 void blockdev_auto_del(BlockBackend
*blk
)
165 DriveInfo
*dinfo
= blk_legacy_dinfo(blk
);
167 if (dinfo
&& dinfo
->auto_del
) {
168 monitor_remove_blk(blk
);
174 * Returns the current mapping of how many units per bus
175 * a particular interface can support.
177 * A positive integer indicates n units per bus.
178 * 0 implies the mapping has not been established.
179 * -1 indicates an invalid BlockInterfaceType was given.
181 int drive_get_max_devs(BlockInterfaceType type
)
183 if (type
>= IF_IDE
&& type
< IF_COUNT
) {
184 return if_max_devs
[type
];
190 static int drive_index_to_bus_id(BlockInterfaceType type
, int index
)
192 int max_devs
= if_max_devs
[type
];
193 return max_devs
? index
/ max_devs
: 0;
196 static int drive_index_to_unit_id(BlockInterfaceType type
, int index
)
198 int max_devs
= if_max_devs
[type
];
199 return max_devs
? index
% max_devs
: index
;
202 QemuOpts
*drive_def(const char *optstr
)
204 return qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr
, false);
207 QemuOpts
*drive_add(BlockInterfaceType type
, int index
, const char *file
,
212 opts
= drive_def(optstr
);
216 if (type
!= IF_DEFAULT
) {
217 qemu_opt_set(opts
, "if", if_name
[type
], &error_abort
);
220 qemu_opt_set_number(opts
, "index", index
, &error_abort
);
223 qemu_opt_set(opts
, "file", file
, &error_abort
);
227 DriveInfo
*drive_get(BlockInterfaceType type
, int bus
, int unit
)
232 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
233 dinfo
= blk_legacy_dinfo(blk
);
234 if (dinfo
&& dinfo
->type
== type
235 && dinfo
->bus
== bus
&& dinfo
->unit
== unit
) {
243 void drive_check_orphaned(void)
248 bool orphans
= false;
250 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
251 dinfo
= blk_legacy_dinfo(blk
);
252 if (!blk_get_attached_dev(blk
) && !dinfo
->is_default
&&
253 dinfo
->type
!= IF_NONE
) {
255 qemu_opts_loc_restore(dinfo
->opts
);
256 error_report("machine type does not support"
257 " if=%s,bus=%d,unit=%d",
258 if_name
[dinfo
->type
], dinfo
->bus
, dinfo
->unit
);
269 DriveInfo
*drive_get_by_index(BlockInterfaceType type
, int index
)
271 return drive_get(type
,
272 drive_index_to_bus_id(type
, index
),
273 drive_index_to_unit_id(type
, index
));
276 int drive_get_max_bus(BlockInterfaceType type
)
283 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
284 dinfo
= blk_legacy_dinfo(blk
);
285 if (dinfo
&& dinfo
->type
== type
&& dinfo
->bus
> max_bus
) {
286 max_bus
= dinfo
->bus
;
292 /* Get a block device. This should only be used for single-drive devices
293 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
295 DriveInfo
*drive_get_next(BlockInterfaceType type
)
297 static int next_block_unit
[IF_COUNT
];
299 return drive_get(type
, 0, next_block_unit
[type
]++);
302 static void bdrv_format_print(void *opaque
, const char *name
)
304 error_printf(" %s", name
);
309 BlockDriverState
*bs
;
312 static int parse_block_error_action(const char *buf
, bool is_read
, Error
**errp
)
314 if (!strcmp(buf
, "ignore")) {
315 return BLOCKDEV_ON_ERROR_IGNORE
;
316 } else if (!is_read
&& !strcmp(buf
, "enospc")) {
317 return BLOCKDEV_ON_ERROR_ENOSPC
;
318 } else if (!strcmp(buf
, "stop")) {
319 return BLOCKDEV_ON_ERROR_STOP
;
320 } else if (!strcmp(buf
, "report")) {
321 return BLOCKDEV_ON_ERROR_REPORT
;
323 error_setg(errp
, "'%s' invalid %s error action",
324 buf
, is_read
? "read" : "write");
329 static bool parse_stats_intervals(BlockAcctStats
*stats
, QList
*intervals
,
332 const QListEntry
*entry
;
333 for (entry
= qlist_first(intervals
); entry
; entry
= qlist_next(entry
)) {
334 switch (qobject_type(entry
->value
)) {
336 case QTYPE_QSTRING
: {
337 unsigned long long length
;
338 const char *str
= qstring_get_str(qobject_to(QString
,
340 if (parse_uint_full(str
, &length
, 10) == 0 &&
341 length
> 0 && length
<= UINT_MAX
) {
342 block_acct_add_interval(stats
, (unsigned) length
);
344 error_setg(errp
, "Invalid interval length: %s", str
);
351 int64_t length
= qnum_get_int(qobject_to(QNum
, entry
->value
));
353 if (length
> 0 && length
<= UINT_MAX
) {
354 block_acct_add_interval(stats
, (unsigned) length
);
356 error_setg(errp
, "Invalid interval length: %" PRId64
, length
);
363 error_setg(errp
, "The specification of stats-intervals is invalid");
370 typedef enum { MEDIA_DISK
, MEDIA_CDROM
} DriveMediaType
;
372 /* All parameters but @opts are optional and may be set to NULL. */
373 static void extract_common_blockdev_options(QemuOpts
*opts
, int *bdrv_flags
,
374 const char **throttling_group
, ThrottleConfig
*throttle_cfg
,
375 BlockdevDetectZeroesOptions
*detect_zeroes
, Error
**errp
)
377 Error
*local_error
= NULL
;
381 if (qemu_opt_get_bool(opts
, "copy-on-read", false)) {
382 *bdrv_flags
|= BDRV_O_COPY_ON_READ
;
385 if ((aio
= qemu_opt_get(opts
, "aio")) != NULL
) {
386 if (!strcmp(aio
, "native")) {
387 *bdrv_flags
|= BDRV_O_NATIVE_AIO
;
388 } else if (!strcmp(aio
, "threads")) {
389 /* this is the default */
391 error_setg(errp
, "invalid aio option");
397 /* disk I/O throttling */
398 if (throttling_group
) {
399 *throttling_group
= qemu_opt_get(opts
, "throttling.group");
403 throttle_config_init(throttle_cfg
);
404 throttle_cfg
->buckets
[THROTTLE_BPS_TOTAL
].avg
=
405 qemu_opt_get_number(opts
, "throttling.bps-total", 0);
406 throttle_cfg
->buckets
[THROTTLE_BPS_READ
].avg
=
407 qemu_opt_get_number(opts
, "throttling.bps-read", 0);
408 throttle_cfg
->buckets
[THROTTLE_BPS_WRITE
].avg
=
409 qemu_opt_get_number(opts
, "throttling.bps-write", 0);
410 throttle_cfg
->buckets
[THROTTLE_OPS_TOTAL
].avg
=
411 qemu_opt_get_number(opts
, "throttling.iops-total", 0);
412 throttle_cfg
->buckets
[THROTTLE_OPS_READ
].avg
=
413 qemu_opt_get_number(opts
, "throttling.iops-read", 0);
414 throttle_cfg
->buckets
[THROTTLE_OPS_WRITE
].avg
=
415 qemu_opt_get_number(opts
, "throttling.iops-write", 0);
417 throttle_cfg
->buckets
[THROTTLE_BPS_TOTAL
].max
=
418 qemu_opt_get_number(opts
, "throttling.bps-total-max", 0);
419 throttle_cfg
->buckets
[THROTTLE_BPS_READ
].max
=
420 qemu_opt_get_number(opts
, "throttling.bps-read-max", 0);
421 throttle_cfg
->buckets
[THROTTLE_BPS_WRITE
].max
=
422 qemu_opt_get_number(opts
, "throttling.bps-write-max", 0);
423 throttle_cfg
->buckets
[THROTTLE_OPS_TOTAL
].max
=
424 qemu_opt_get_number(opts
, "throttling.iops-total-max", 0);
425 throttle_cfg
->buckets
[THROTTLE_OPS_READ
].max
=
426 qemu_opt_get_number(opts
, "throttling.iops-read-max", 0);
427 throttle_cfg
->buckets
[THROTTLE_OPS_WRITE
].max
=
428 qemu_opt_get_number(opts
, "throttling.iops-write-max", 0);
430 throttle_cfg
->buckets
[THROTTLE_BPS_TOTAL
].burst_length
=
431 qemu_opt_get_number(opts
, "throttling.bps-total-max-length", 1);
432 throttle_cfg
->buckets
[THROTTLE_BPS_READ
].burst_length
=
433 qemu_opt_get_number(opts
, "throttling.bps-read-max-length", 1);
434 throttle_cfg
->buckets
[THROTTLE_BPS_WRITE
].burst_length
=
435 qemu_opt_get_number(opts
, "throttling.bps-write-max-length", 1);
436 throttle_cfg
->buckets
[THROTTLE_OPS_TOTAL
].burst_length
=
437 qemu_opt_get_number(opts
, "throttling.iops-total-max-length", 1);
438 throttle_cfg
->buckets
[THROTTLE_OPS_READ
].burst_length
=
439 qemu_opt_get_number(opts
, "throttling.iops-read-max-length", 1);
440 throttle_cfg
->buckets
[THROTTLE_OPS_WRITE
].burst_length
=
441 qemu_opt_get_number(opts
, "throttling.iops-write-max-length", 1);
443 throttle_cfg
->op_size
=
444 qemu_opt_get_number(opts
, "throttling.iops-size", 0);
446 if (!throttle_is_valid(throttle_cfg
, errp
)) {
453 qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup
,
454 qemu_opt_get(opts
, "detect-zeroes"),
455 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF
,
458 error_propagate(errp
, local_error
);
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_str(bs_opts
, "driver", 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
;
574 blk
= blk_new(0, BLK_PERM_ALL
);
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
;
580 qobject_unref(bs_opts
);
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 block_acct_setup(blk_get_stats(blk
), account_invalid
, account_failed
);
609 if (!parse_stats_intervals(blk_get_stats(blk
), interval_list
, errp
)) {
616 /* disk I/O throttling */
617 if (throttle_enabled(&cfg
)) {
618 if (!throttling_group
) {
619 throttling_group
= id
;
621 blk_io_limits_enable(blk
, throttling_group
);
622 blk_set_io_limits(blk
, &cfg
);
625 blk_set_enable_write_cache(blk
, !writethrough
);
626 blk_set_on_error(blk
, on_read_error
, on_write_error
);
628 if (!monitor_add_blk(blk
, id
, errp
)) {
636 qobject_unref(interval_dict
);
637 qobject_unref(interval_list
);
642 qobject_unref(interval_dict
);
643 qobject_unref(interval_list
);
645 qobject_unref(bs_opts
);
649 /* Takes the ownership of bs_opts */
650 static BlockDriverState
*bds_tree_init(QDict
*bs_opts
, Error
**errp
)
654 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
655 * with other callers) rather than what we want as the real defaults.
656 * Apply the defaults here instead. */
657 qdict_set_default_str(bs_opts
, BDRV_OPT_CACHE_DIRECT
, "off");
658 qdict_set_default_str(bs_opts
, BDRV_OPT_CACHE_NO_FLUSH
, "off");
659 qdict_set_default_str(bs_opts
, BDRV_OPT_READ_ONLY
, "off");
661 if (runstate_check(RUN_STATE_INMIGRATE
)) {
662 bdrv_flags
|= BDRV_O_INACTIVE
;
665 return bdrv_open(NULL
, NULL
, bs_opts
, bdrv_flags
, errp
);
668 void blockdev_close_all_bdrv_states(void)
670 BlockDriverState
*bs
, *next_bs
;
672 QTAILQ_FOREACH_SAFE(bs
, &monitor_bdrv_states
, monitor_list
, next_bs
) {
673 AioContext
*ctx
= bdrv_get_aio_context(bs
);
675 aio_context_acquire(ctx
);
677 aio_context_release(ctx
);
681 /* Iterates over the list of monitor-owned BlockDriverStates */
682 BlockDriverState
*bdrv_next_monitor_owned(BlockDriverState
*bs
)
684 return bs
? QTAILQ_NEXT(bs
, monitor_list
)
685 : QTAILQ_FIRST(&monitor_bdrv_states
);
688 static void qemu_opt_rename(QemuOpts
*opts
, const char *from
, const char *to
,
693 value
= qemu_opt_get(opts
, from
);
695 if (qemu_opt_find(opts
, to
)) {
696 error_setg(errp
, "'%s' and its alias '%s' can't be used at the "
697 "same time", to
, from
);
702 /* rename all items in opts */
703 while ((value
= qemu_opt_get(opts
, from
))) {
704 qemu_opt_set(opts
, to
, value
, &error_abort
);
705 qemu_opt_unset(opts
, from
);
709 QemuOptsList qemu_legacy_drive_opts
= {
711 .head
= QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts
.head
),
715 .type
= QEMU_OPT_NUMBER
,
716 .help
= "bus number",
719 .type
= QEMU_OPT_NUMBER
,
720 .help
= "unit number (i.e. lun for scsi)",
723 .type
= QEMU_OPT_NUMBER
,
724 .help
= "index number",
727 .type
= QEMU_OPT_STRING
,
728 .help
= "media type (disk, cdrom)",
731 .type
= QEMU_OPT_STRING
,
732 .help
= "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
735 .type
= QEMU_OPT_STRING
,
739 /* Options that are passed on, but have special semantics with -drive */
741 .name
= BDRV_OPT_READ_ONLY
,
742 .type
= QEMU_OPT_BOOL
,
743 .help
= "open drive file as read-only",
746 .type
= QEMU_OPT_STRING
,
747 .help
= "read error action",
750 .type
= QEMU_OPT_STRING
,
751 .help
= "write error action",
753 .name
= "copy-on-read",
754 .type
= QEMU_OPT_BOOL
,
755 .help
= "copy read data from backing file into image file",
758 { /* end of list */ }
762 DriveInfo
*drive_new(QemuOpts
*all_opts
, BlockInterfaceType block_default_type
)
766 DriveInfo
*dinfo
= NULL
;
768 QemuOpts
*legacy_opts
;
769 DriveMediaType media
= MEDIA_DISK
;
770 BlockInterfaceType type
;
771 int max_devs
, bus_id
, unit_id
, index
;
772 const char *werror
, *rerror
;
773 bool read_only
= false;
775 const char *filename
;
776 Error
*local_err
= NULL
;
778 const char *deprecated
[] = {
781 /* Change legacy command line options into QMP ones */
782 static const struct {
786 { "iops", "throttling.iops-total" },
787 { "iops_rd", "throttling.iops-read" },
788 { "iops_wr", "throttling.iops-write" },
790 { "bps", "throttling.bps-total" },
791 { "bps_rd", "throttling.bps-read" },
792 { "bps_wr", "throttling.bps-write" },
794 { "iops_max", "throttling.iops-total-max" },
795 { "iops_rd_max", "throttling.iops-read-max" },
796 { "iops_wr_max", "throttling.iops-write-max" },
798 { "bps_max", "throttling.bps-total-max" },
799 { "bps_rd_max", "throttling.bps-read-max" },
800 { "bps_wr_max", "throttling.bps-write-max" },
802 { "iops_size", "throttling.iops-size" },
804 { "group", "throttling.group" },
806 { "readonly", BDRV_OPT_READ_ONLY
},
809 for (i
= 0; i
< ARRAY_SIZE(opt_renames
); i
++) {
810 qemu_opt_rename(all_opts
, opt_renames
[i
].from
, opt_renames
[i
].to
,
813 error_report_err(local_err
);
818 value
= qemu_opt_get(all_opts
, "cache");
823 if (bdrv_parse_cache_mode(value
, &flags
, &writethrough
) != 0) {
824 error_report("invalid cache option");
828 /* Specific options take precedence */
829 if (!qemu_opt_get(all_opts
, BDRV_OPT_CACHE_WB
)) {
830 qemu_opt_set_bool(all_opts
, BDRV_OPT_CACHE_WB
,
831 !writethrough
, &error_abort
);
833 if (!qemu_opt_get(all_opts
, BDRV_OPT_CACHE_DIRECT
)) {
834 qemu_opt_set_bool(all_opts
, BDRV_OPT_CACHE_DIRECT
,
835 !!(flags
& BDRV_O_NOCACHE
), &error_abort
);
837 if (!qemu_opt_get(all_opts
, BDRV_OPT_CACHE_NO_FLUSH
)) {
838 qemu_opt_set_bool(all_opts
, BDRV_OPT_CACHE_NO_FLUSH
,
839 !!(flags
& BDRV_O_NO_FLUSH
), &error_abort
);
841 qemu_opt_unset(all_opts
, "cache");
844 /* Get a QDict for processing the options */
845 bs_opts
= qdict_new();
846 qemu_opts_to_qdict(all_opts
, bs_opts
);
848 legacy_opts
= qemu_opts_create(&qemu_legacy_drive_opts
, NULL
, 0,
850 qemu_opts_absorb_qdict(legacy_opts
, bs_opts
, &local_err
);
852 error_report_err(local_err
);
856 /* Other deprecated options */
857 if (!qtest_enabled()) {
858 for (i
= 0; i
< ARRAY_SIZE(deprecated
); i
++) {
859 if (qemu_opt_get(legacy_opts
, deprecated
[i
]) != NULL
) {
860 error_report("'%s' is deprecated, please use the corresponding "
861 "option of '-device' instead", deprecated
[i
]);
867 value
= qemu_opt_get(legacy_opts
, "media");
869 if (!strcmp(value
, "disk")) {
871 } else if (!strcmp(value
, "cdrom")) {
875 error_report("'%s' invalid media", value
);
880 /* copy-on-read is disabled with a warning for read-only devices */
881 read_only
|= qemu_opt_get_bool(legacy_opts
, BDRV_OPT_READ_ONLY
, false);
882 copy_on_read
= qemu_opt_get_bool(legacy_opts
, "copy-on-read", false);
884 if (read_only
&& copy_on_read
) {
885 warn_report("disabling copy-on-read on read-only drive");
886 copy_on_read
= false;
889 qdict_put_str(bs_opts
, BDRV_OPT_READ_ONLY
, read_only
? "on" : "off");
890 qdict_put_str(bs_opts
, "copy-on-read", copy_on_read
? "on" : "off");
892 /* Controller type */
893 value
= qemu_opt_get(legacy_opts
, "if");
896 type
< IF_COUNT
&& strcmp(value
, if_name
[type
]);
899 if (type
== IF_COUNT
) {
900 error_report("unsupported bus type '%s'", value
);
904 type
= block_default_type
;
907 /* Device address specified by bus/unit or index.
908 * If none was specified, try to find the first free one. */
909 bus_id
= qemu_opt_get_number(legacy_opts
, "bus", 0);
910 unit_id
= qemu_opt_get_number(legacy_opts
, "unit", -1);
911 index
= qemu_opt_get_number(legacy_opts
, "index", -1);
913 max_devs
= if_max_devs
[type
];
916 if (bus_id
!= 0 || unit_id
!= -1) {
917 error_report("index cannot be used with bus and unit");
920 bus_id
= drive_index_to_bus_id(type
, index
);
921 unit_id
= drive_index_to_unit_id(type
, index
);
926 while (drive_get(type
, bus_id
, unit_id
) != NULL
) {
928 if (max_devs
&& unit_id
>= max_devs
) {
935 if (max_devs
&& unit_id
>= max_devs
) {
936 error_report("unit %d too big (max is %d)", unit_id
, max_devs
- 1);
940 if (drive_get(type
, bus_id
, unit_id
) != NULL
) {
941 error_report("drive with bus=%d, unit=%d (index=%d) exists",
942 bus_id
, unit_id
, index
);
946 /* no id supplied -> create one */
947 if (qemu_opts_id(all_opts
) == NULL
) {
949 const char *mediastr
= "";
950 if (type
== IF_IDE
|| type
== IF_SCSI
) {
951 mediastr
= (media
== MEDIA_CDROM
) ? "-cd" : "-hd";
954 new_id
= g_strdup_printf("%s%i%s%i", if_name
[type
], bus_id
,
957 new_id
= g_strdup_printf("%s%s%i", if_name
[type
],
960 qdict_put_str(bs_opts
, "id", new_id
);
964 /* Add virtio block device */
965 if (type
== IF_VIRTIO
) {
967 devopts
= qemu_opts_create(qemu_find_opts("device"), NULL
, 0,
969 if (arch_type
== QEMU_ARCH_S390X
) {
970 qemu_opt_set(devopts
, "driver", "virtio-blk-ccw", &error_abort
);
972 qemu_opt_set(devopts
, "driver", "virtio-blk-pci", &error_abort
);
974 qemu_opt_set(devopts
, "drive", qdict_get_str(bs_opts
, "id"),
978 filename
= qemu_opt_get(legacy_opts
, "file");
980 /* Check werror/rerror compatibility with if=... */
981 werror
= qemu_opt_get(legacy_opts
, "werror");
982 if (werror
!= NULL
) {
983 if (type
!= IF_IDE
&& type
!= IF_SCSI
&& type
!= IF_VIRTIO
&&
985 error_report("werror is not supported by this bus type");
988 qdict_put_str(bs_opts
, "werror", werror
);
991 rerror
= qemu_opt_get(legacy_opts
, "rerror");
992 if (rerror
!= NULL
) {
993 if (type
!= IF_IDE
&& type
!= IF_VIRTIO
&& type
!= IF_SCSI
&&
995 error_report("rerror is not supported by this bus type");
998 qdict_put_str(bs_opts
, "rerror", rerror
);
1001 /* Actual block device init: Functionality shared with blockdev-add */
1002 blk
= blockdev_init(filename
, bs_opts
, &local_err
);
1006 error_report_err(local_err
);
1013 /* Create legacy DriveInfo */
1014 dinfo
= g_malloc0(sizeof(*dinfo
));
1015 dinfo
->opts
= all_opts
;
1018 dinfo
->bus
= bus_id
;
1019 dinfo
->unit
= unit_id
;
1021 blk_set_legacy_dinfo(blk
, dinfo
);
1028 dinfo
->media_cd
= media
== MEDIA_CDROM
;
1035 qemu_opts_del(legacy_opts
);
1036 qobject_unref(bs_opts
);
1040 static BlockDriverState
*qmp_get_root_bs(const char *name
, Error
**errp
)
1042 BlockDriverState
*bs
;
1044 bs
= bdrv_lookup_bs(name
, name
, errp
);
1049 if (!bdrv_is_root_node(bs
)) {
1050 error_setg(errp
, "Need a root block node");
1054 if (!bdrv_is_inserted(bs
)) {
1055 error_setg(errp
, "Device has no medium");
1062 static BlockBackend
*qmp_get_blk(const char *blk_name
, const char *qdev_id
,
1067 if (!blk_name
== !qdev_id
) {
1068 error_setg(errp
, "Need exactly one of 'device' and 'id'");
1073 blk
= blk_by_qdev_id(qdev_id
, errp
);
1075 blk
= blk_by_name(blk_name
);
1077 error_set(errp
, ERROR_CLASS_DEVICE_NOT_FOUND
,
1078 "Device '%s' not found", blk_name
);
1085 void hmp_commit(Monitor
*mon
, const QDict
*qdict
)
1087 const char *device
= qdict_get_str(qdict
, "device");
1091 if (!strcmp(device
, "all")) {
1092 ret
= blk_commit_all();
1094 BlockDriverState
*bs
;
1095 AioContext
*aio_context
;
1097 blk
= blk_by_name(device
);
1099 monitor_printf(mon
, "Device '%s' not found\n", device
);
1102 if (!blk_is_available(blk
)) {
1103 monitor_printf(mon
, "Device '%s' has no medium\n", device
);
1108 aio_context
= bdrv_get_aio_context(bs
);
1109 aio_context_acquire(aio_context
);
1111 ret
= bdrv_commit(bs
);
1113 aio_context_release(aio_context
);
1116 monitor_printf(mon
, "'commit' error for '%s': %s\n", device
,
1121 static void blockdev_do_action(TransactionAction
*action
, Error
**errp
)
1123 TransactionActionList list
;
1125 list
.value
= action
;
1127 qmp_transaction(&list
, false, NULL
, errp
);
1130 void qmp_blockdev_snapshot_sync(bool has_device
, const char *device
,
1131 bool has_node_name
, const char *node_name
,
1132 const char *snapshot_file
,
1133 bool has_snapshot_node_name
,
1134 const char *snapshot_node_name
,
1135 bool has_format
, const char *format
,
1136 bool has_mode
, NewImageMode mode
, Error
**errp
)
1138 BlockdevSnapshotSync snapshot
= {
1139 .has_device
= has_device
,
1140 .device
= (char *) device
,
1141 .has_node_name
= has_node_name
,
1142 .node_name
= (char *) node_name
,
1143 .snapshot_file
= (char *) snapshot_file
,
1144 .has_snapshot_node_name
= has_snapshot_node_name
,
1145 .snapshot_node_name
= (char *) snapshot_node_name
,
1146 .has_format
= has_format
,
1147 .format
= (char *) format
,
1148 .has_mode
= has_mode
,
1151 TransactionAction action
= {
1152 .type
= TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
,
1153 .u
.blockdev_snapshot_sync
.data
= &snapshot
,
1155 blockdev_do_action(&action
, errp
);
1158 void qmp_blockdev_snapshot(const char *node
, const char *overlay
,
1161 BlockdevSnapshot snapshot_data
= {
1162 .node
= (char *) node
,
1163 .overlay
= (char *) overlay
1165 TransactionAction action
= {
1166 .type
= TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT
,
1167 .u
.blockdev_snapshot
.data
= &snapshot_data
,
1169 blockdev_do_action(&action
, errp
);
1172 void qmp_blockdev_snapshot_internal_sync(const char *device
,
1176 BlockdevSnapshotInternal snapshot
= {
1177 .device
= (char *) device
,
1178 .name
= (char *) name
1180 TransactionAction action
= {
1181 .type
= TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
,
1182 .u
.blockdev_snapshot_internal_sync
.data
= &snapshot
,
1184 blockdev_do_action(&action
, errp
);
1187 SnapshotInfo
*qmp_blockdev_snapshot_delete_internal_sync(const char *device
,
1194 BlockDriverState
*bs
;
1195 AioContext
*aio_context
;
1196 QEMUSnapshotInfo sn
;
1197 Error
*local_err
= NULL
;
1198 SnapshotInfo
*info
= NULL
;
1201 bs
= qmp_get_root_bs(device
, errp
);
1205 aio_context
= bdrv_get_aio_context(bs
);
1206 aio_context_acquire(aio_context
);
1217 error_setg(errp
, "Name or id must be provided");
1218 goto out_aio_context
;
1221 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE
, errp
)) {
1222 goto out_aio_context
;
1225 ret
= bdrv_snapshot_find_by_id_and_name(bs
, id
, name
, &sn
, &local_err
);
1227 error_propagate(errp
, local_err
);
1228 goto out_aio_context
;
1232 "Snapshot with id '%s' and name '%s' does not exist on "
1234 STR_OR_NULL(id
), STR_OR_NULL(name
), device
);
1235 goto out_aio_context
;
1238 bdrv_snapshot_delete(bs
, id
, name
, &local_err
);
1240 error_propagate(errp
, local_err
);
1241 goto out_aio_context
;
1244 aio_context_release(aio_context
);
1246 info
= g_new0(SnapshotInfo
, 1);
1247 info
->id
= g_strdup(sn
.id_str
);
1248 info
->name
= g_strdup(sn
.name
);
1249 info
->date_nsec
= sn
.date_nsec
;
1250 info
->date_sec
= sn
.date_sec
;
1251 info
->vm_state_size
= sn
.vm_state_size
;
1252 info
->vm_clock_nsec
= sn
.vm_clock_nsec
% 1000000000;
1253 info
->vm_clock_sec
= sn
.vm_clock_nsec
/ 1000000000;
1258 aio_context_release(aio_context
);
1263 * block_dirty_bitmap_lookup:
1264 * Return a dirty bitmap (if present), after validating
1265 * the node reference and bitmap names.
1267 * @node: The name of the BDS node to search for bitmaps
1268 * @name: The name of the bitmap to search for
1269 * @pbs: Output pointer for BDS lookup, if desired. Can be NULL.
1270 * @paio: Output pointer for aio_context acquisition, if desired. Can be NULL.
1271 * @errp: Output pointer for error information. Can be NULL.
1273 * @return: A bitmap object on success, or NULL on failure.
1275 static BdrvDirtyBitmap
*block_dirty_bitmap_lookup(const char *node
,
1277 BlockDriverState
**pbs
,
1280 BlockDriverState
*bs
;
1281 BdrvDirtyBitmap
*bitmap
;
1284 error_setg(errp
, "Node cannot be NULL");
1288 error_setg(errp
, "Bitmap name cannot be NULL");
1291 bs
= bdrv_lookup_bs(node
, node
, NULL
);
1293 error_setg(errp
, "Node '%s' not found", node
);
1297 bitmap
= bdrv_find_dirty_bitmap(bs
, name
);
1299 error_setg(errp
, "Dirty bitmap '%s' not found", name
);
1310 /* New and old BlockDriverState structs for atomic group operations */
1312 typedef struct BlkActionState BlkActionState
;
1316 * Table of operations that define an Action.
1318 * @instance_size: Size of state struct, in bytes.
1319 * @prepare: Prepare the work, must NOT be NULL.
1320 * @commit: Commit the changes, can be NULL.
1321 * @abort: Abort the changes on fail, can be NULL.
1322 * @clean: Clean up resources after all transaction actions have called
1323 * commit() or abort(). Can be NULL.
1325 * Only prepare() may fail. In a single transaction, only one of commit() or
1326 * abort() will be called. clean() will always be called if it is present.
1328 typedef struct BlkActionOps
{
1329 size_t instance_size
;
1330 void (*prepare
)(BlkActionState
*common
, Error
**errp
);
1331 void (*commit
)(BlkActionState
*common
);
1332 void (*abort
)(BlkActionState
*common
);
1333 void (*clean
)(BlkActionState
*common
);
1338 * Describes one Action's state within a Transaction.
1340 * @action: QAPI-defined enum identifying which Action to perform.
1341 * @ops: Table of ActionOps this Action can perform.
1342 * @block_job_txn: Transaction which this action belongs to.
1343 * @entry: List membership for all Actions in this Transaction.
1345 * This structure must be arranged as first member in a subclassed type,
1346 * assuming that the compiler will also arrange it to the same offsets as the
1349 struct BlkActionState
{
1350 TransactionAction
*action
;
1351 const BlkActionOps
*ops
;
1352 JobTxn
*block_job_txn
;
1353 TransactionProperties
*txn_props
;
1354 QSIMPLEQ_ENTRY(BlkActionState
) entry
;
1357 /* internal snapshot private data */
1358 typedef struct InternalSnapshotState
{
1359 BlkActionState common
;
1360 BlockDriverState
*bs
;
1361 QEMUSnapshotInfo sn
;
1363 } InternalSnapshotState
;
1366 static int action_check_completion_mode(BlkActionState
*s
, Error
**errp
)
1368 if (s
->txn_props
->completion_mode
!= ACTION_COMPLETION_MODE_INDIVIDUAL
) {
1370 "Action '%s' does not support Transaction property "
1371 "completion-mode = %s",
1372 TransactionActionKind_str(s
->action
->type
),
1373 ActionCompletionMode_str(s
->txn_props
->completion_mode
));
1379 static void internal_snapshot_prepare(BlkActionState
*common
,
1382 Error
*local_err
= NULL
;
1385 BlockDriverState
*bs
;
1386 QEMUSnapshotInfo old_sn
, *sn
;
1389 BlockdevSnapshotInternal
*internal
;
1390 InternalSnapshotState
*state
;
1391 AioContext
*aio_context
;
1394 g_assert(common
->action
->type
==
1395 TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
);
1396 internal
= common
->action
->u
.blockdev_snapshot_internal_sync
.data
;
1397 state
= DO_UPCAST(InternalSnapshotState
, common
, common
);
1399 /* 1. parse input */
1400 device
= internal
->device
;
1401 name
= internal
->name
;
1403 /* 2. check for validation */
1404 if (action_check_completion_mode(common
, errp
) < 0) {
1408 bs
= qmp_get_root_bs(device
, errp
);
1413 aio_context
= bdrv_get_aio_context(bs
);
1414 aio_context_acquire(aio_context
);
1418 /* Paired with .clean() */
1419 bdrv_drained_begin(bs
);
1421 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT
, errp
)) {
1425 if (bdrv_is_read_only(bs
)) {
1426 error_setg(errp
, "Device '%s' is read only", device
);
1430 if (!bdrv_can_snapshot(bs
)) {
1431 error_setg(errp
, "Block format '%s' used by device '%s' "
1432 "does not support internal snapshots",
1433 bs
->drv
->format_name
, device
);
1437 if (!strlen(name
)) {
1438 error_setg(errp
, "Name is empty");
1442 /* check whether a snapshot with name exist */
1443 ret
= bdrv_snapshot_find_by_id_and_name(bs
, NULL
, name
, &old_sn
,
1446 error_propagate(errp
, local_err
);
1450 "Snapshot with name '%s' already exists on device '%s'",
1455 /* 3. take the snapshot */
1457 pstrcpy(sn
->name
, sizeof(sn
->name
), name
);
1458 qemu_gettimeofday(&tv
);
1459 sn
->date_sec
= tv
.tv_sec
;
1460 sn
->date_nsec
= tv
.tv_usec
* 1000;
1461 sn
->vm_clock_nsec
= qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
);
1463 ret1
= bdrv_snapshot_create(bs
, sn
);
1465 error_setg_errno(errp
, -ret1
,
1466 "Failed to create snapshot '%s' on device '%s'",
1471 /* 4. succeed, mark a snapshot is created */
1472 state
->created
= true;
1475 aio_context_release(aio_context
);
1478 static void internal_snapshot_abort(BlkActionState
*common
)
1480 InternalSnapshotState
*state
=
1481 DO_UPCAST(InternalSnapshotState
, common
, common
);
1482 BlockDriverState
*bs
= state
->bs
;
1483 QEMUSnapshotInfo
*sn
= &state
->sn
;
1484 AioContext
*aio_context
;
1485 Error
*local_error
= NULL
;
1487 if (!state
->created
) {
1491 aio_context
= bdrv_get_aio_context(state
->bs
);
1492 aio_context_acquire(aio_context
);
1494 if (bdrv_snapshot_delete(bs
, sn
->id_str
, sn
->name
, &local_error
) < 0) {
1495 error_reportf_err(local_error
,
1496 "Failed to delete snapshot with id '%s' and "
1497 "name '%s' on device '%s' in abort: ",
1498 sn
->id_str
, sn
->name
,
1499 bdrv_get_device_name(bs
));
1502 aio_context_release(aio_context
);
1505 static void internal_snapshot_clean(BlkActionState
*common
)
1507 InternalSnapshotState
*state
= DO_UPCAST(InternalSnapshotState
,
1509 AioContext
*aio_context
;
1515 aio_context
= bdrv_get_aio_context(state
->bs
);
1516 aio_context_acquire(aio_context
);
1518 bdrv_drained_end(state
->bs
);
1520 aio_context_release(aio_context
);
1523 /* external snapshot private data */
1524 typedef struct ExternalSnapshotState
{
1525 BlkActionState common
;
1526 BlockDriverState
*old_bs
;
1527 BlockDriverState
*new_bs
;
1528 bool overlay_appended
;
1529 } ExternalSnapshotState
;
1531 static void external_snapshot_prepare(BlkActionState
*common
,
1535 QDict
*options
= NULL
;
1536 Error
*local_err
= NULL
;
1537 /* Device and node name of the image to generate the snapshot from */
1539 const char *node_name
;
1540 /* Reference to the new image (for 'blockdev-snapshot') */
1541 const char *snapshot_ref
;
1542 /* File name of the new image (for 'blockdev-snapshot-sync') */
1543 const char *new_image_file
;
1544 ExternalSnapshotState
*state
=
1545 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1546 TransactionAction
*action
= common
->action
;
1547 AioContext
*aio_context
;
1549 /* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar
1550 * purpose but a different set of parameters */
1551 switch (action
->type
) {
1552 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT
:
1554 BlockdevSnapshot
*s
= action
->u
.blockdev_snapshot
.data
;
1556 node_name
= s
->node
;
1557 new_image_file
= NULL
;
1558 snapshot_ref
= s
->overlay
;
1561 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
:
1563 BlockdevSnapshotSync
*s
= action
->u
.blockdev_snapshot_sync
.data
;
1564 device
= s
->has_device
? s
->device
: NULL
;
1565 node_name
= s
->has_node_name
? s
->node_name
: NULL
;
1566 new_image_file
= s
->snapshot_file
;
1567 snapshot_ref
= NULL
;
1571 g_assert_not_reached();
1574 /* start processing */
1575 if (action_check_completion_mode(common
, errp
) < 0) {
1579 state
->old_bs
= bdrv_lookup_bs(device
, node_name
, errp
);
1580 if (!state
->old_bs
) {
1584 aio_context
= bdrv_get_aio_context(state
->old_bs
);
1585 aio_context_acquire(aio_context
);
1587 /* Paired with .clean() */
1588 bdrv_drained_begin(state
->old_bs
);
1590 if (!bdrv_is_inserted(state
->old_bs
)) {
1591 error_setg(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
1595 if (bdrv_op_is_blocked(state
->old_bs
,
1596 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT
, errp
)) {
1600 if (!bdrv_is_read_only(state
->old_bs
)) {
1601 if (bdrv_flush(state
->old_bs
)) {
1602 error_setg(errp
, QERR_IO_ERROR
);
1607 if (!bdrv_is_first_non_filter(state
->old_bs
)) {
1608 error_setg(errp
, QERR_FEATURE_DISABLED
, "snapshot");
1612 if (action
->type
== TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
) {
1613 BlockdevSnapshotSync
*s
= action
->u
.blockdev_snapshot_sync
.data
;
1614 const char *format
= s
->has_format
? s
->format
: "qcow2";
1615 enum NewImageMode mode
;
1616 const char *snapshot_node_name
=
1617 s
->has_snapshot_node_name
? s
->snapshot_node_name
: NULL
;
1619 if (node_name
&& !snapshot_node_name
) {
1620 error_setg(errp
, "New snapshot node name missing");
1624 if (snapshot_node_name
&&
1625 bdrv_lookup_bs(snapshot_node_name
, snapshot_node_name
, NULL
)) {
1626 error_setg(errp
, "New snapshot node name already in use");
1630 flags
= state
->old_bs
->open_flags
;
1631 flags
&= ~(BDRV_O_SNAPSHOT
| BDRV_O_COPY_ON_READ
);
1632 flags
|= BDRV_O_NO_BACKING
;
1634 /* create new image w/backing file */
1635 mode
= s
->has_mode
? s
->mode
: NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
1636 if (mode
!= NEW_IMAGE_MODE_EXISTING
) {
1637 int64_t size
= bdrv_getlength(state
->old_bs
);
1639 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
1642 bdrv_img_create(new_image_file
, format
,
1643 state
->old_bs
->filename
,
1644 state
->old_bs
->drv
->format_name
,
1645 NULL
, size
, flags
, false, &local_err
);
1647 error_propagate(errp
, local_err
);
1652 options
= qdict_new();
1653 if (s
->has_snapshot_node_name
) {
1654 qdict_put_str(options
, "node-name", snapshot_node_name
);
1656 qdict_put_str(options
, "driver", format
);
1659 state
->new_bs
= bdrv_open(new_image_file
, snapshot_ref
, options
, flags
,
1661 /* We will manually add the backing_hd field to the bs later */
1662 if (!state
->new_bs
) {
1666 if (bdrv_has_blk(state
->new_bs
)) {
1667 error_setg(errp
, "The snapshot is already in use");
1671 if (bdrv_op_is_blocked(state
->new_bs
, BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT
,
1676 if (state
->new_bs
->backing
!= NULL
) {
1677 error_setg(errp
, "The snapshot already has a backing image");
1681 if (!state
->new_bs
->drv
->supports_backing
) {
1682 error_setg(errp
, "The snapshot does not support backing images");
1686 bdrv_set_aio_context(state
->new_bs
, aio_context
);
1688 /* This removes our old bs and adds the new bs. This is an operation that
1689 * can fail, so we need to do it in .prepare; undoing it for abort is
1690 * always possible. */
1691 bdrv_ref(state
->new_bs
);
1692 bdrv_append(state
->new_bs
, state
->old_bs
, &local_err
);
1694 error_propagate(errp
, local_err
);
1697 state
->overlay_appended
= true;
1700 aio_context_release(aio_context
);
1703 static void external_snapshot_commit(BlkActionState
*common
)
1705 ExternalSnapshotState
*state
=
1706 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1707 AioContext
*aio_context
;
1709 aio_context
= bdrv_get_aio_context(state
->old_bs
);
1710 aio_context_acquire(aio_context
);
1712 /* We don't need (or want) to use the transactional
1713 * bdrv_reopen_multiple() across all the entries at once, because we
1714 * don't want to abort all of them if one of them fails the reopen */
1715 if (!atomic_read(&state
->old_bs
->copy_on_read
)) {
1716 bdrv_reopen(state
->old_bs
, state
->old_bs
->open_flags
& ~BDRV_O_RDWR
,
1720 aio_context_release(aio_context
);
1723 static void external_snapshot_abort(BlkActionState
*common
)
1725 ExternalSnapshotState
*state
=
1726 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1727 if (state
->new_bs
) {
1728 if (state
->overlay_appended
) {
1729 AioContext
*aio_context
;
1731 aio_context
= bdrv_get_aio_context(state
->old_bs
);
1732 aio_context_acquire(aio_context
);
1734 bdrv_ref(state
->old_bs
); /* we can't let bdrv_set_backind_hd()
1735 close state->old_bs; we need it */
1736 bdrv_set_backing_hd(state
->new_bs
, NULL
, &error_abort
);
1737 bdrv_replace_node(state
->new_bs
, state
->old_bs
, &error_abort
);
1738 bdrv_unref(state
->old_bs
); /* bdrv_replace_node() ref'ed old_bs */
1740 aio_context_release(aio_context
);
1745 static void external_snapshot_clean(BlkActionState
*common
)
1747 ExternalSnapshotState
*state
=
1748 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1749 AioContext
*aio_context
;
1751 if (!state
->old_bs
) {
1755 aio_context
= bdrv_get_aio_context(state
->old_bs
);
1756 aio_context_acquire(aio_context
);
1758 bdrv_drained_end(state
->old_bs
);
1759 bdrv_unref(state
->new_bs
);
1761 aio_context_release(aio_context
);
1764 typedef struct DriveBackupState
{
1765 BlkActionState common
;
1766 BlockDriverState
*bs
;
1770 static BlockJob
*do_drive_backup(DriveBackup
*backup
, JobTxn
*txn
,
1773 static void drive_backup_prepare(BlkActionState
*common
, Error
**errp
)
1775 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1776 BlockDriverState
*bs
;
1777 DriveBackup
*backup
;
1778 AioContext
*aio_context
;
1779 Error
*local_err
= NULL
;
1781 assert(common
->action
->type
== TRANSACTION_ACTION_KIND_DRIVE_BACKUP
);
1782 backup
= common
->action
->u
.drive_backup
.data
;
1784 bs
= qmp_get_root_bs(backup
->device
, errp
);
1789 aio_context
= bdrv_get_aio_context(bs
);
1790 aio_context_acquire(aio_context
);
1792 /* Paired with .clean() */
1793 bdrv_drained_begin(bs
);
1797 state
->job
= do_drive_backup(backup
, common
->block_job_txn
, &local_err
);
1799 error_propagate(errp
, local_err
);
1804 aio_context_release(aio_context
);
1807 static void drive_backup_commit(BlkActionState
*common
)
1809 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1810 AioContext
*aio_context
;
1812 aio_context
= bdrv_get_aio_context(state
->bs
);
1813 aio_context_acquire(aio_context
);
1816 job_start(&state
->job
->job
);
1818 aio_context_release(aio_context
);
1821 static void drive_backup_abort(BlkActionState
*common
)
1823 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1826 AioContext
*aio_context
;
1828 aio_context
= bdrv_get_aio_context(state
->bs
);
1829 aio_context_acquire(aio_context
);
1831 job_cancel_sync(&state
->job
->job
);
1833 aio_context_release(aio_context
);
1837 static void drive_backup_clean(BlkActionState
*common
)
1839 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1840 AioContext
*aio_context
;
1846 aio_context
= bdrv_get_aio_context(state
->bs
);
1847 aio_context_acquire(aio_context
);
1849 bdrv_drained_end(state
->bs
);
1851 aio_context_release(aio_context
);
1854 typedef struct BlockdevBackupState
{
1855 BlkActionState common
;
1856 BlockDriverState
*bs
;
1858 } BlockdevBackupState
;
1860 static BlockJob
*do_blockdev_backup(BlockdevBackup
*backup
, JobTxn
*txn
,
1863 static void blockdev_backup_prepare(BlkActionState
*common
, Error
**errp
)
1865 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
1866 BlockdevBackup
*backup
;
1867 BlockDriverState
*bs
, *target
;
1868 AioContext
*aio_context
;
1869 Error
*local_err
= NULL
;
1871 assert(common
->action
->type
== TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP
);
1872 backup
= common
->action
->u
.blockdev_backup
.data
;
1874 bs
= bdrv_lookup_bs(backup
->device
, backup
->device
, errp
);
1879 target
= bdrv_lookup_bs(backup
->target
, backup
->target
, errp
);
1884 aio_context
= bdrv_get_aio_context(bs
);
1885 if (aio_context
!= bdrv_get_aio_context(target
)) {
1886 error_setg(errp
, "Backup between two IO threads is not implemented");
1889 aio_context_acquire(aio_context
);
1892 /* Paired with .clean() */
1893 bdrv_drained_begin(state
->bs
);
1895 state
->job
= do_blockdev_backup(backup
, common
->block_job_txn
, &local_err
);
1897 error_propagate(errp
, local_err
);
1902 aio_context_release(aio_context
);
1905 static void blockdev_backup_commit(BlkActionState
*common
)
1907 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
1908 AioContext
*aio_context
;
1910 aio_context
= bdrv_get_aio_context(state
->bs
);
1911 aio_context_acquire(aio_context
);
1914 job_start(&state
->job
->job
);
1916 aio_context_release(aio_context
);
1919 static void blockdev_backup_abort(BlkActionState
*common
)
1921 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
1924 AioContext
*aio_context
;
1926 aio_context
= bdrv_get_aio_context(state
->bs
);
1927 aio_context_acquire(aio_context
);
1929 job_cancel_sync(&state
->job
->job
);
1931 aio_context_release(aio_context
);
1935 static void blockdev_backup_clean(BlkActionState
*common
)
1937 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
1938 AioContext
*aio_context
;
1944 aio_context
= bdrv_get_aio_context(state
->bs
);
1945 aio_context_acquire(aio_context
);
1947 bdrv_drained_end(state
->bs
);
1949 aio_context_release(aio_context
);
1952 typedef struct BlockDirtyBitmapState
{
1953 BlkActionState common
;
1954 BdrvDirtyBitmap
*bitmap
;
1955 BlockDriverState
*bs
;
1959 } BlockDirtyBitmapState
;
1961 static void block_dirty_bitmap_add_prepare(BlkActionState
*common
,
1964 Error
*local_err
= NULL
;
1965 BlockDirtyBitmapAdd
*action
;
1966 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
1969 if (action_check_completion_mode(common
, errp
) < 0) {
1973 action
= common
->action
->u
.block_dirty_bitmap_add
.data
;
1974 /* AIO context taken and released within qmp_block_dirty_bitmap_add */
1975 qmp_block_dirty_bitmap_add(action
->node
, action
->name
,
1976 action
->has_granularity
, action
->granularity
,
1977 action
->has_persistent
, action
->persistent
,
1978 action
->has_autoload
, action
->autoload
,
1979 action
->has_x_disabled
, action
->x_disabled
,
1983 state
->prepared
= true;
1985 error_propagate(errp
, local_err
);
1989 static void block_dirty_bitmap_add_abort(BlkActionState
*common
)
1991 BlockDirtyBitmapAdd
*action
;
1992 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
1995 action
= common
->action
->u
.block_dirty_bitmap_add
.data
;
1996 /* Should not be able to fail: IF the bitmap was added via .prepare(),
1997 * then the node reference and bitmap name must have been valid.
1999 if (state
->prepared
) {
2000 qmp_block_dirty_bitmap_remove(action
->node
, action
->name
, &error_abort
);
2004 static void block_dirty_bitmap_clear_prepare(BlkActionState
*common
,
2007 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2009 BlockDirtyBitmap
*action
;
2011 if (action_check_completion_mode(common
, errp
) < 0) {
2015 action
= common
->action
->u
.block_dirty_bitmap_clear
.data
;
2016 state
->bitmap
= block_dirty_bitmap_lookup(action
->node
,
2020 if (!state
->bitmap
) {
2024 if (bdrv_dirty_bitmap_frozen(state
->bitmap
)) {
2025 error_setg(errp
, "Cannot modify a frozen bitmap");
2027 } else if (bdrv_dirty_bitmap_qmp_locked(state
->bitmap
)) {
2028 error_setg(errp
, "Cannot modify a locked bitmap");
2030 } else if (!bdrv_dirty_bitmap_enabled(state
->bitmap
)) {
2031 error_setg(errp
, "Cannot clear a disabled bitmap");
2033 } else if (bdrv_dirty_bitmap_readonly(state
->bitmap
)) {
2034 error_setg(errp
, "Cannot clear a readonly bitmap");
2038 bdrv_clear_dirty_bitmap(state
->bitmap
, &state
->backup
);
2041 static void block_dirty_bitmap_clear_abort(BlkActionState
*common
)
2043 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2046 if (state
->backup
) {
2047 bdrv_undo_clear_dirty_bitmap(state
->bitmap
, state
->backup
);
2051 static void block_dirty_bitmap_clear_commit(BlkActionState
*common
)
2053 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2056 hbitmap_free(state
->backup
);
2059 static void block_dirty_bitmap_enable_prepare(BlkActionState
*common
,
2062 BlockDirtyBitmap
*action
;
2063 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2066 if (action_check_completion_mode(common
, errp
) < 0) {
2070 action
= common
->action
->u
.x_block_dirty_bitmap_enable
.data
;
2071 state
->bitmap
= block_dirty_bitmap_lookup(action
->node
,
2075 if (!state
->bitmap
) {
2079 state
->was_enabled
= bdrv_dirty_bitmap_enabled(state
->bitmap
);
2080 bdrv_enable_dirty_bitmap(state
->bitmap
);
2083 static void block_dirty_bitmap_enable_abort(BlkActionState
*common
)
2085 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2088 if (!state
->was_enabled
) {
2089 bdrv_disable_dirty_bitmap(state
->bitmap
);
2093 static void block_dirty_bitmap_disable_prepare(BlkActionState
*common
,
2096 BlockDirtyBitmap
*action
;
2097 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2100 if (action_check_completion_mode(common
, errp
) < 0) {
2104 action
= common
->action
->u
.x_block_dirty_bitmap_disable
.data
;
2105 state
->bitmap
= block_dirty_bitmap_lookup(action
->node
,
2109 if (!state
->bitmap
) {
2113 state
->was_enabled
= bdrv_dirty_bitmap_enabled(state
->bitmap
);
2114 bdrv_disable_dirty_bitmap(state
->bitmap
);
2117 static void block_dirty_bitmap_disable_abort(BlkActionState
*common
)
2119 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2122 if (state
->was_enabled
) {
2123 bdrv_enable_dirty_bitmap(state
->bitmap
);
2127 static void abort_prepare(BlkActionState
*common
, Error
**errp
)
2129 error_setg(errp
, "Transaction aborted using Abort action");
2132 static void abort_commit(BlkActionState
*common
)
2134 g_assert_not_reached(); /* this action never succeeds */
2137 static const BlkActionOps actions
[] = {
2138 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT
] = {
2139 .instance_size
= sizeof(ExternalSnapshotState
),
2140 .prepare
= external_snapshot_prepare
,
2141 .commit
= external_snapshot_commit
,
2142 .abort
= external_snapshot_abort
,
2143 .clean
= external_snapshot_clean
,
2145 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
] = {
2146 .instance_size
= sizeof(ExternalSnapshotState
),
2147 .prepare
= external_snapshot_prepare
,
2148 .commit
= external_snapshot_commit
,
2149 .abort
= external_snapshot_abort
,
2150 .clean
= external_snapshot_clean
,
2152 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP
] = {
2153 .instance_size
= sizeof(DriveBackupState
),
2154 .prepare
= drive_backup_prepare
,
2155 .commit
= drive_backup_commit
,
2156 .abort
= drive_backup_abort
,
2157 .clean
= drive_backup_clean
,
2159 [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP
] = {
2160 .instance_size
= sizeof(BlockdevBackupState
),
2161 .prepare
= blockdev_backup_prepare
,
2162 .commit
= blockdev_backup_commit
,
2163 .abort
= blockdev_backup_abort
,
2164 .clean
= blockdev_backup_clean
,
2166 [TRANSACTION_ACTION_KIND_ABORT
] = {
2167 .instance_size
= sizeof(BlkActionState
),
2168 .prepare
= abort_prepare
,
2169 .commit
= abort_commit
,
2171 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
] = {
2172 .instance_size
= sizeof(InternalSnapshotState
),
2173 .prepare
= internal_snapshot_prepare
,
2174 .abort
= internal_snapshot_abort
,
2175 .clean
= internal_snapshot_clean
,
2177 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD
] = {
2178 .instance_size
= sizeof(BlockDirtyBitmapState
),
2179 .prepare
= block_dirty_bitmap_add_prepare
,
2180 .abort
= block_dirty_bitmap_add_abort
,
2182 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR
] = {
2183 .instance_size
= sizeof(BlockDirtyBitmapState
),
2184 .prepare
= block_dirty_bitmap_clear_prepare
,
2185 .commit
= block_dirty_bitmap_clear_commit
,
2186 .abort
= block_dirty_bitmap_clear_abort
,
2188 [TRANSACTION_ACTION_KIND_X_BLOCK_DIRTY_BITMAP_ENABLE
] = {
2189 .instance_size
= sizeof(BlockDirtyBitmapState
),
2190 .prepare
= block_dirty_bitmap_enable_prepare
,
2191 .abort
= block_dirty_bitmap_enable_abort
,
2193 [TRANSACTION_ACTION_KIND_X_BLOCK_DIRTY_BITMAP_DISABLE
] = {
2194 .instance_size
= sizeof(BlockDirtyBitmapState
),
2195 .prepare
= block_dirty_bitmap_disable_prepare
,
2196 .abort
= block_dirty_bitmap_disable_abort
,
2201 * Allocate a TransactionProperties structure if necessary, and fill
2202 * that structure with desired defaults if they are unset.
2204 static TransactionProperties
*get_transaction_properties(
2205 TransactionProperties
*props
)
2208 props
= g_new0(TransactionProperties
, 1);
2211 if (!props
->has_completion_mode
) {
2212 props
->has_completion_mode
= true;
2213 props
->completion_mode
= ACTION_COMPLETION_MODE_INDIVIDUAL
;
2220 * 'Atomic' group operations. The operations are performed as a set, and if
2221 * any fail then we roll back all operations in the group.
2223 void qmp_transaction(TransactionActionList
*dev_list
,
2225 struct TransactionProperties
*props
,
2228 TransactionActionList
*dev_entry
= dev_list
;
2229 JobTxn
*block_job_txn
= NULL
;
2230 BlkActionState
*state
, *next
;
2231 Error
*local_err
= NULL
;
2233 QSIMPLEQ_HEAD(snap_bdrv_states
, BlkActionState
) snap_bdrv_states
;
2234 QSIMPLEQ_INIT(&snap_bdrv_states
);
2236 /* Does this transaction get canceled as a group on failure?
2237 * If not, we don't really need to make a JobTxn.
2239 props
= get_transaction_properties(props
);
2240 if (props
->completion_mode
!= ACTION_COMPLETION_MODE_INDIVIDUAL
) {
2241 block_job_txn
= job_txn_new();
2244 /* drain all i/o before any operations */
2247 /* We don't do anything in this loop that commits us to the operations */
2248 while (NULL
!= dev_entry
) {
2249 TransactionAction
*dev_info
= NULL
;
2250 const BlkActionOps
*ops
;
2252 dev_info
= dev_entry
->value
;
2253 dev_entry
= dev_entry
->next
;
2255 assert(dev_info
->type
< ARRAY_SIZE(actions
));
2257 ops
= &actions
[dev_info
->type
];
2258 assert(ops
->instance_size
> 0);
2260 state
= g_malloc0(ops
->instance_size
);
2262 state
->action
= dev_info
;
2263 state
->block_job_txn
= block_job_txn
;
2264 state
->txn_props
= props
;
2265 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states
, state
, entry
);
2267 state
->ops
->prepare(state
, &local_err
);
2269 error_propagate(errp
, local_err
);
2270 goto delete_and_fail
;
2274 QSIMPLEQ_FOREACH(state
, &snap_bdrv_states
, entry
) {
2275 if (state
->ops
->commit
) {
2276 state
->ops
->commit(state
);
2284 /* failure, and it is all-or-none; roll back all operations */
2285 QSIMPLEQ_FOREACH(state
, &snap_bdrv_states
, entry
) {
2286 if (state
->ops
->abort
) {
2287 state
->ops
->abort(state
);
2291 QSIMPLEQ_FOREACH_SAFE(state
, &snap_bdrv_states
, entry
, next
) {
2292 if (state
->ops
->clean
) {
2293 state
->ops
->clean(state
);
2298 qapi_free_TransactionProperties(props
);
2300 job_txn_unref(block_job_txn
);
2303 void qmp_eject(bool has_device
, const char *device
,
2304 bool has_id
, const char *id
,
2305 bool has_force
, bool force
, Error
**errp
)
2307 Error
*local_err
= NULL
;
2314 rc
= do_open_tray(has_device
? device
: NULL
,
2317 if (rc
&& rc
!= -ENOSYS
) {
2318 error_propagate(errp
, local_err
);
2321 error_free(local_err
);
2323 blockdev_remove_medium(has_device
, device
, has_id
, id
, errp
);
2326 void qmp_block_passwd(bool has_device
, const char *device
,
2327 bool has_node_name
, const char *node_name
,
2328 const char *password
, Error
**errp
)
2331 "Setting block passwords directly is no longer supported");
2335 * Attempt to open the tray of @device.
2336 * If @force, ignore its tray lock.
2337 * Else, if the tray is locked, don't open it, but ask the guest to open it.
2338 * On error, store an error through @errp and return -errno.
2339 * If @device does not exist, return -ENODEV.
2340 * If it has no removable media, return -ENOTSUP.
2341 * If it has no tray, return -ENOSYS.
2342 * If the guest was asked to open the tray, return -EINPROGRESS.
2345 static int do_open_tray(const char *blk_name
, const char *qdev_id
,
2346 bool force
, Error
**errp
)
2349 const char *device
= qdev_id
?: blk_name
;
2352 blk
= qmp_get_blk(blk_name
, qdev_id
, errp
);
2357 if (!blk_dev_has_removable_media(blk
)) {
2358 error_setg(errp
, "Device '%s' is not removable", device
);
2362 if (!blk_dev_has_tray(blk
)) {
2363 error_setg(errp
, "Device '%s' does not have a tray", device
);
2367 if (blk_dev_is_tray_open(blk
)) {
2371 locked
= blk_dev_is_medium_locked(blk
);
2373 blk_dev_eject_request(blk
, force
);
2376 if (!locked
|| force
) {
2377 blk_dev_change_media_cb(blk
, false, &error_abort
);
2380 if (locked
&& !force
) {
2381 error_setg(errp
, "Device '%s' is locked and force was not specified, "
2382 "wait for tray to open and try again", device
);
2383 return -EINPROGRESS
;
2389 void qmp_blockdev_open_tray(bool has_device
, const char *device
,
2390 bool has_id
, const char *id
,
2391 bool has_force
, bool force
,
2394 Error
*local_err
= NULL
;
2400 rc
= do_open_tray(has_device
? device
: NULL
,
2403 if (rc
&& rc
!= -ENOSYS
&& rc
!= -EINPROGRESS
) {
2404 error_propagate(errp
, local_err
);
2407 error_free(local_err
);
2410 void qmp_blockdev_close_tray(bool has_device
, const char *device
,
2411 bool has_id
, const char *id
,
2415 Error
*local_err
= NULL
;
2417 device
= has_device
? device
: NULL
;
2418 id
= has_id
? id
: NULL
;
2420 blk
= qmp_get_blk(device
, id
, errp
);
2425 if (!blk_dev_has_removable_media(blk
)) {
2426 error_setg(errp
, "Device '%s' is not removable", device
?: id
);
2430 if (!blk_dev_has_tray(blk
)) {
2431 /* Ignore this command on tray-less devices */
2435 if (!blk_dev_is_tray_open(blk
)) {
2439 blk_dev_change_media_cb(blk
, true, &local_err
);
2441 error_propagate(errp
, local_err
);
2446 static void blockdev_remove_medium(bool has_device
, const char *device
,
2447 bool has_id
, const char *id
, Error
**errp
)
2450 BlockDriverState
*bs
;
2451 AioContext
*aio_context
;
2452 bool has_attached_device
;
2454 device
= has_device
? device
: NULL
;
2455 id
= has_id
? id
: NULL
;
2457 blk
= qmp_get_blk(device
, id
, errp
);
2462 /* For BBs without a device, we can exchange the BDS tree at will */
2463 has_attached_device
= blk_get_attached_dev(blk
);
2465 if (has_attached_device
&& !blk_dev_has_removable_media(blk
)) {
2466 error_setg(errp
, "Device '%s' is not removable", device
?: id
);
2470 if (has_attached_device
&& blk_dev_has_tray(blk
) &&
2471 !blk_dev_is_tray_open(blk
))
2473 error_setg(errp
, "Tray of device '%s' is not open", device
?: id
);
2482 aio_context
= bdrv_get_aio_context(bs
);
2483 aio_context_acquire(aio_context
);
2485 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_EJECT
, errp
)) {
2491 if (!blk_dev_has_tray(blk
)) {
2492 /* For tray-less devices, blockdev-open-tray is a no-op (or may not be
2493 * called at all); therefore, the medium needs to be ejected here.
2494 * Do it after blk_remove_bs() so blk_is_inserted(blk) returns the @load
2495 * value passed here (i.e. false). */
2496 blk_dev_change_media_cb(blk
, false, &error_abort
);
2500 aio_context_release(aio_context
);
2503 void qmp_blockdev_remove_medium(const char *id
, Error
**errp
)
2505 blockdev_remove_medium(false, NULL
, true, id
, errp
);
2508 static void qmp_blockdev_insert_anon_medium(BlockBackend
*blk
,
2509 BlockDriverState
*bs
, Error
**errp
)
2511 Error
*local_err
= NULL
;
2515 /* For BBs without a device, we can exchange the BDS tree at will */
2516 has_device
= blk_get_attached_dev(blk
);
2518 if (has_device
&& !blk_dev_has_removable_media(blk
)) {
2519 error_setg(errp
, "Device is not removable");
2523 if (has_device
&& blk_dev_has_tray(blk
) && !blk_dev_is_tray_open(blk
)) {
2524 error_setg(errp
, "Tray of the device is not open");
2529 error_setg(errp
, "There already is a medium in the device");
2533 ret
= blk_insert_bs(blk
, bs
, errp
);
2538 if (!blk_dev_has_tray(blk
)) {
2539 /* For tray-less devices, blockdev-close-tray is a no-op (or may not be
2540 * called at all); therefore, the medium needs to be pushed into the
2542 * Do it after blk_insert_bs() so blk_is_inserted(blk) returns the @load
2543 * value passed here (i.e. true). */
2544 blk_dev_change_media_cb(blk
, true, &local_err
);
2546 error_propagate(errp
, local_err
);
2553 static void blockdev_insert_medium(bool has_device
, const char *device
,
2554 bool has_id
, const char *id
,
2555 const char *node_name
, Error
**errp
)
2558 BlockDriverState
*bs
;
2560 blk
= qmp_get_blk(has_device
? device
: NULL
,
2567 bs
= bdrv_find_node(node_name
);
2569 error_setg(errp
, "Node '%s' not found", node_name
);
2573 if (bdrv_has_blk(bs
)) {
2574 error_setg(errp
, "Node '%s' is already in use", node_name
);
2578 qmp_blockdev_insert_anon_medium(blk
, bs
, errp
);
2581 void qmp_blockdev_insert_medium(const char *id
, const char *node_name
,
2584 blockdev_insert_medium(false, NULL
, true, id
, node_name
, errp
);
2587 void qmp_blockdev_change_medium(bool has_device
, const char *device
,
2588 bool has_id
, const char *id
,
2589 const char *filename
,
2590 bool has_format
, const char *format
,
2592 BlockdevChangeReadOnlyMode read_only
,
2596 BlockDriverState
*medium_bs
= NULL
;
2600 QDict
*options
= NULL
;
2603 blk
= qmp_get_blk(has_device
? device
: NULL
,
2611 blk_update_root_state(blk
);
2614 bdrv_flags
= blk_get_open_flags_from_root_state(blk
);
2615 bdrv_flags
&= ~(BDRV_O_TEMPORARY
| BDRV_O_SNAPSHOT
| BDRV_O_NO_BACKING
|
2618 if (!has_read_only
) {
2619 read_only
= BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN
;
2622 switch (read_only
) {
2623 case BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN
:
2626 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_ONLY
:
2627 bdrv_flags
&= ~BDRV_O_RDWR
;
2630 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_WRITE
:
2631 bdrv_flags
|= BDRV_O_RDWR
;
2638 options
= qdict_new();
2639 detect_zeroes
= blk_get_detect_zeroes_from_root_state(blk
);
2640 qdict_put_str(options
, "detect-zeroes", detect_zeroes
? "on" : "off");
2643 qdict_put_str(options
, "driver", format
);
2646 medium_bs
= bdrv_open(filename
, NULL
, options
, bdrv_flags
, errp
);
2651 rc
= do_open_tray(has_device
? device
: NULL
,
2654 if (rc
&& rc
!= -ENOSYS
) {
2655 error_propagate(errp
, err
);
2661 blockdev_remove_medium(has_device
, device
, has_id
, id
, &err
);
2663 error_propagate(errp
, err
);
2667 qmp_blockdev_insert_anon_medium(blk
, medium_bs
, &err
);
2669 error_propagate(errp
, err
);
2673 qmp_blockdev_close_tray(has_device
, device
, has_id
, id
, errp
);
2676 /* If the medium has been inserted, the device has its own reference, so
2677 * ours must be relinquished; and if it has not been inserted successfully,
2678 * the reference must be relinquished anyway */
2679 bdrv_unref(medium_bs
);
2682 /* throttling disk I/O limits */
2683 void qmp_block_set_io_throttle(BlockIOThrottle
*arg
, Error
**errp
)
2686 BlockDriverState
*bs
;
2688 AioContext
*aio_context
;
2690 blk
= qmp_get_blk(arg
->has_device
? arg
->device
: NULL
,
2691 arg
->has_id
? arg
->id
: NULL
,
2697 aio_context
= blk_get_aio_context(blk
);
2698 aio_context_acquire(aio_context
);
2702 error_setg(errp
, "Device has no medium");
2706 throttle_config_init(&cfg
);
2707 cfg
.buckets
[THROTTLE_BPS_TOTAL
].avg
= arg
->bps
;
2708 cfg
.buckets
[THROTTLE_BPS_READ
].avg
= arg
->bps_rd
;
2709 cfg
.buckets
[THROTTLE_BPS_WRITE
].avg
= arg
->bps_wr
;
2711 cfg
.buckets
[THROTTLE_OPS_TOTAL
].avg
= arg
->iops
;
2712 cfg
.buckets
[THROTTLE_OPS_READ
].avg
= arg
->iops_rd
;
2713 cfg
.buckets
[THROTTLE_OPS_WRITE
].avg
= arg
->iops_wr
;
2715 if (arg
->has_bps_max
) {
2716 cfg
.buckets
[THROTTLE_BPS_TOTAL
].max
= arg
->bps_max
;
2718 if (arg
->has_bps_rd_max
) {
2719 cfg
.buckets
[THROTTLE_BPS_READ
].max
= arg
->bps_rd_max
;
2721 if (arg
->has_bps_wr_max
) {
2722 cfg
.buckets
[THROTTLE_BPS_WRITE
].max
= arg
->bps_wr_max
;
2724 if (arg
->has_iops_max
) {
2725 cfg
.buckets
[THROTTLE_OPS_TOTAL
].max
= arg
->iops_max
;
2727 if (arg
->has_iops_rd_max
) {
2728 cfg
.buckets
[THROTTLE_OPS_READ
].max
= arg
->iops_rd_max
;
2730 if (arg
->has_iops_wr_max
) {
2731 cfg
.buckets
[THROTTLE_OPS_WRITE
].max
= arg
->iops_wr_max
;
2734 if (arg
->has_bps_max_length
) {
2735 cfg
.buckets
[THROTTLE_BPS_TOTAL
].burst_length
= arg
->bps_max_length
;
2737 if (arg
->has_bps_rd_max_length
) {
2738 cfg
.buckets
[THROTTLE_BPS_READ
].burst_length
= arg
->bps_rd_max_length
;
2740 if (arg
->has_bps_wr_max_length
) {
2741 cfg
.buckets
[THROTTLE_BPS_WRITE
].burst_length
= arg
->bps_wr_max_length
;
2743 if (arg
->has_iops_max_length
) {
2744 cfg
.buckets
[THROTTLE_OPS_TOTAL
].burst_length
= arg
->iops_max_length
;
2746 if (arg
->has_iops_rd_max_length
) {
2747 cfg
.buckets
[THROTTLE_OPS_READ
].burst_length
= arg
->iops_rd_max_length
;
2749 if (arg
->has_iops_wr_max_length
) {
2750 cfg
.buckets
[THROTTLE_OPS_WRITE
].burst_length
= arg
->iops_wr_max_length
;
2753 if (arg
->has_iops_size
) {
2754 cfg
.op_size
= arg
->iops_size
;
2757 if (!throttle_is_valid(&cfg
, errp
)) {
2761 if (throttle_enabled(&cfg
)) {
2762 /* Enable I/O limits if they're not enabled yet, otherwise
2763 * just update the throttling group. */
2764 if (!blk_get_public(blk
)->throttle_group_member
.throttle_state
) {
2765 blk_io_limits_enable(blk
,
2766 arg
->has_group
? arg
->group
:
2767 arg
->has_device
? arg
->device
:
2769 } else if (arg
->has_group
) {
2770 blk_io_limits_update_group(blk
, arg
->group
);
2772 /* Set the new throttling configuration */
2773 blk_set_io_limits(blk
, &cfg
);
2774 } else if (blk_get_public(blk
)->throttle_group_member
.throttle_state
) {
2775 /* If all throttling settings are set to 0, disable I/O limits */
2776 blk_io_limits_disable(blk
);
2780 aio_context_release(aio_context
);
2783 void qmp_block_dirty_bitmap_add(const char *node
, const char *name
,
2784 bool has_granularity
, uint32_t granularity
,
2785 bool has_persistent
, bool persistent
,
2786 bool has_autoload
, bool autoload
,
2787 bool has_disabled
, bool disabled
,
2790 BlockDriverState
*bs
;
2791 BdrvDirtyBitmap
*bitmap
;
2793 if (!name
|| name
[0] == '\0') {
2794 error_setg(errp
, "Bitmap name cannot be empty");
2798 bs
= bdrv_lookup_bs(node
, node
, errp
);
2803 if (has_granularity
) {
2804 if (granularity
< 512 || !is_power_of_2(granularity
)) {
2805 error_setg(errp
, "Granularity must be power of 2 "
2806 "and at least 512");
2810 /* Default to cluster size, if available: */
2811 granularity
= bdrv_get_default_bitmap_granularity(bs
);
2814 if (!has_persistent
) {
2819 warn_report("Autoload option is deprecated and its value is ignored");
2822 if (!has_disabled
) {
2827 !bdrv_can_store_new_dirty_bitmap(bs
, name
, granularity
, errp
))
2832 bitmap
= bdrv_create_dirty_bitmap(bs
, granularity
, name
, errp
);
2833 if (bitmap
== NULL
) {
2838 bdrv_disable_dirty_bitmap(bitmap
);
2841 bdrv_dirty_bitmap_set_persistance(bitmap
, persistent
);
2844 void qmp_block_dirty_bitmap_remove(const char *node
, const char *name
,
2847 BlockDriverState
*bs
;
2848 BdrvDirtyBitmap
*bitmap
;
2849 Error
*local_err
= NULL
;
2851 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
2852 if (!bitmap
|| !bs
) {
2856 if (bdrv_dirty_bitmap_frozen(bitmap
)) {
2858 "Bitmap '%s' is currently frozen and cannot be removed",
2861 } else if (bdrv_dirty_bitmap_qmp_locked(bitmap
)) {
2863 "Bitmap '%s' is currently locked and cannot be removed",
2868 if (bdrv_dirty_bitmap_get_persistance(bitmap
)) {
2869 bdrv_remove_persistent_dirty_bitmap(bs
, name
, &local_err
);
2870 if (local_err
!= NULL
) {
2871 error_propagate(errp
, local_err
);
2876 bdrv_release_dirty_bitmap(bs
, bitmap
);
2880 * Completely clear a bitmap, for the purposes of synchronizing a bitmap
2881 * immediately after a full backup operation.
2883 void qmp_block_dirty_bitmap_clear(const char *node
, const char *name
,
2886 BdrvDirtyBitmap
*bitmap
;
2887 BlockDriverState
*bs
;
2889 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
2890 if (!bitmap
|| !bs
) {
2894 if (bdrv_dirty_bitmap_frozen(bitmap
)) {
2896 "Bitmap '%s' is currently frozen and cannot be modified",
2899 } else if (bdrv_dirty_bitmap_qmp_locked(bitmap
)) {
2901 "Bitmap '%s' is currently locked and cannot be modified",
2904 } else if (!bdrv_dirty_bitmap_enabled(bitmap
)) {
2906 "Bitmap '%s' is currently disabled and cannot be cleared",
2909 } else if (bdrv_dirty_bitmap_readonly(bitmap
)) {
2910 error_setg(errp
, "Bitmap '%s' is readonly and cannot be cleared", name
);
2914 bdrv_clear_dirty_bitmap(bitmap
, NULL
);
2917 void qmp_x_block_dirty_bitmap_enable(const char *node
, const char *name
,
2920 BlockDriverState
*bs
;
2921 BdrvDirtyBitmap
*bitmap
;
2923 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
2928 if (bdrv_dirty_bitmap_frozen(bitmap
)) {
2930 "Bitmap '%s' is currently frozen and cannot be enabled",
2935 bdrv_enable_dirty_bitmap(bitmap
);
2938 void qmp_x_block_dirty_bitmap_disable(const char *node
, const char *name
,
2941 BlockDriverState
*bs
;
2942 BdrvDirtyBitmap
*bitmap
;
2944 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
2949 if (bdrv_dirty_bitmap_frozen(bitmap
)) {
2951 "Bitmap '%s' is currently frozen and cannot be disabled",
2956 bdrv_disable_dirty_bitmap(bitmap
);
2959 void qmp_x_block_dirty_bitmap_merge(const char *node
, const char *dst_name
,
2960 const char *src_name
, Error
**errp
)
2962 BlockDriverState
*bs
;
2963 BdrvDirtyBitmap
*dst
, *src
;
2965 dst
= block_dirty_bitmap_lookup(node
, dst_name
, &bs
, errp
);
2970 if (bdrv_dirty_bitmap_frozen(dst
)) {
2971 error_setg(errp
, "Bitmap '%s' is frozen and cannot be modified",
2974 } else if (bdrv_dirty_bitmap_readonly(dst
)) {
2975 error_setg(errp
, "Bitmap '%s' is readonly and cannot be modified",
2980 src
= bdrv_find_dirty_bitmap(bs
, src_name
);
2982 error_setg(errp
, "Dirty bitmap '%s' not found", src_name
);
2986 bdrv_merge_dirty_bitmap(dst
, src
, errp
);
2989 BlockDirtyBitmapSha256
*qmp_x_debug_block_dirty_bitmap_sha256(const char *node
,
2993 BdrvDirtyBitmap
*bitmap
;
2994 BlockDriverState
*bs
;
2995 BlockDirtyBitmapSha256
*ret
= NULL
;
2998 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
2999 if (!bitmap
|| !bs
) {
3003 sha256
= bdrv_dirty_bitmap_sha256(bitmap
, errp
);
3004 if (sha256
== NULL
) {
3008 ret
= g_new(BlockDirtyBitmapSha256
, 1);
3009 ret
->sha256
= sha256
;
3014 void hmp_drive_del(Monitor
*mon
, const QDict
*qdict
)
3016 const char *id
= qdict_get_str(qdict
, "id");
3018 BlockDriverState
*bs
;
3019 AioContext
*aio_context
;
3020 Error
*local_err
= NULL
;
3022 bs
= bdrv_find_node(id
);
3024 qmp_blockdev_del(id
, &local_err
);
3026 error_report_err(local_err
);
3031 blk
= blk_by_name(id
);
3033 error_report("Device '%s' not found", id
);
3037 if (!blk_legacy_dinfo(blk
)) {
3038 error_report("Deleting device added with blockdev-add"
3039 " is not supported");
3043 aio_context
= blk_get_aio_context(blk
);
3044 aio_context_acquire(aio_context
);
3048 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_DRIVE_DEL
, &local_err
)) {
3049 error_report_err(local_err
);
3050 aio_context_release(aio_context
);
3057 /* Make the BlockBackend and the attached BlockDriverState anonymous */
3058 monitor_remove_blk(blk
);
3060 /* If this BlockBackend has a device attached to it, its refcount will be
3061 * decremented when the device is removed; otherwise we have to do so here.
3063 if (blk_get_attached_dev(blk
)) {
3064 /* Further I/O must not pause the guest */
3065 blk_set_on_error(blk
, BLOCKDEV_ON_ERROR_REPORT
,
3066 BLOCKDEV_ON_ERROR_REPORT
);
3071 aio_context_release(aio_context
);
3074 void qmp_block_resize(bool has_device
, const char *device
,
3075 bool has_node_name
, const char *node_name
,
3076 int64_t size
, Error
**errp
)
3078 Error
*local_err
= NULL
;
3079 BlockBackend
*blk
= NULL
;
3080 BlockDriverState
*bs
;
3081 AioContext
*aio_context
;
3084 bs
= bdrv_lookup_bs(has_device
? device
: NULL
,
3085 has_node_name
? node_name
: NULL
,
3088 error_propagate(errp
, local_err
);
3092 aio_context
= bdrv_get_aio_context(bs
);
3093 aio_context_acquire(aio_context
);
3095 if (!bdrv_is_first_non_filter(bs
)) {
3096 error_setg(errp
, QERR_FEATURE_DISABLED
, "resize");
3101 error_setg(errp
, QERR_INVALID_PARAMETER_VALUE
, "size", "a >0 size");
3105 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_RESIZE
, NULL
)) {
3106 error_setg(errp
, QERR_DEVICE_IN_USE
, device
);
3110 blk
= blk_new(BLK_PERM_RESIZE
, BLK_PERM_ALL
);
3111 ret
= blk_insert_bs(blk
, bs
, errp
);
3116 bdrv_drained_begin(bs
);
3117 ret
= blk_truncate(blk
, size
, PREALLOC_MODE_OFF
, errp
);
3118 bdrv_drained_end(bs
);
3122 aio_context_release(aio_context
);
3125 void qmp_block_stream(bool has_job_id
, const char *job_id
, const char *device
,
3126 bool has_base
, const char *base
,
3127 bool has_base_node
, const char *base_node
,
3128 bool has_backing_file
, const char *backing_file
,
3129 bool has_speed
, int64_t speed
,
3130 bool has_on_error
, BlockdevOnError on_error
,
3133 BlockDriverState
*bs
, *iter
;
3134 BlockDriverState
*base_bs
= NULL
;
3135 AioContext
*aio_context
;
3136 Error
*local_err
= NULL
;
3137 const char *base_name
= NULL
;
3139 if (!has_on_error
) {
3140 on_error
= BLOCKDEV_ON_ERROR_REPORT
;
3143 bs
= bdrv_lookup_bs(device
, device
, errp
);
3148 aio_context
= bdrv_get_aio_context(bs
);
3149 aio_context_acquire(aio_context
);
3151 if (has_base
&& has_base_node
) {
3152 error_setg(errp
, "'base' and 'base-node' cannot be specified "
3153 "at the same time");
3158 base_bs
= bdrv_find_backing_image(bs
, base
);
3159 if (base_bs
== NULL
) {
3160 error_setg(errp
, QERR_BASE_NOT_FOUND
, base
);
3163 assert(bdrv_get_aio_context(base_bs
) == aio_context
);
3167 if (has_base_node
) {
3168 base_bs
= bdrv_lookup_bs(NULL
, base_node
, errp
);
3172 if (bs
== base_bs
|| !bdrv_chain_contains(bs
, base_bs
)) {
3173 error_setg(errp
, "Node '%s' is not a backing image of '%s'",
3177 assert(bdrv_get_aio_context(base_bs
) == aio_context
);
3178 base_name
= base_bs
->filename
;
3181 /* Check for op blockers in the whole chain between bs and base */
3182 for (iter
= bs
; iter
&& iter
!= base_bs
; iter
= backing_bs(iter
)) {
3183 if (bdrv_op_is_blocked(iter
, BLOCK_OP_TYPE_STREAM
, errp
)) {
3188 /* if we are streaming the entire chain, the result will have no backing
3189 * file, and specifying one is therefore an error */
3190 if (base_bs
== NULL
&& has_backing_file
) {
3191 error_setg(errp
, "backing file specified, but streaming the "
3196 /* backing_file string overrides base bs filename */
3197 base_name
= has_backing_file
? backing_file
: base_name
;
3199 stream_start(has_job_id
? job_id
: NULL
, bs
, base_bs
, base_name
,
3200 has_speed
? speed
: 0, on_error
, &local_err
);
3202 error_propagate(errp
, local_err
);
3206 trace_qmp_block_stream(bs
, bs
->job
);
3209 aio_context_release(aio_context
);
3212 void qmp_block_commit(bool has_job_id
, const char *job_id
, const char *device
,
3213 bool has_base
, const char *base
,
3214 bool has_top
, const char *top
,
3215 bool has_backing_file
, const char *backing_file
,
3216 bool has_speed
, int64_t speed
,
3217 bool has_filter_node_name
, const char *filter_node_name
,
3220 BlockDriverState
*bs
;
3221 BlockDriverState
*iter
;
3222 BlockDriverState
*base_bs
, *top_bs
;
3223 AioContext
*aio_context
;
3224 Error
*local_err
= NULL
;
3225 /* This will be part of the QMP command, if/when the
3226 * BlockdevOnError change for blkmirror makes it in
3228 BlockdevOnError on_error
= BLOCKDEV_ON_ERROR_REPORT
;
3233 if (!has_filter_node_name
) {
3234 filter_node_name
= NULL
;
3238 * libvirt relies on the DeviceNotFound error class in order to probe for
3239 * live commit feature versions; for this to work, we must make sure to
3240 * perform the device lookup before any generic errors that may occur in a
3241 * scenario in which all optional arguments are omitted. */
3242 bs
= qmp_get_root_bs(device
, &local_err
);
3244 bs
= bdrv_lookup_bs(device
, device
, NULL
);
3246 error_free(local_err
);
3247 error_set(errp
, ERROR_CLASS_DEVICE_NOT_FOUND
,
3248 "Device '%s' not found", device
);
3250 error_propagate(errp
, local_err
);
3255 aio_context
= bdrv_get_aio_context(bs
);
3256 aio_context_acquire(aio_context
);
3258 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_COMMIT_SOURCE
, errp
)) {
3262 /* default top_bs is the active layer */
3265 if (has_top
&& top
) {
3266 if (strcmp(bs
->filename
, top
) != 0) {
3267 top_bs
= bdrv_find_backing_image(bs
, top
);
3271 if (top_bs
== NULL
) {
3272 error_setg(errp
, "Top image file %s not found", top
? top
: "NULL");
3276 assert(bdrv_get_aio_context(top_bs
) == aio_context
);
3278 if (has_base
&& base
) {
3279 base_bs
= bdrv_find_backing_image(top_bs
, base
);
3281 base_bs
= bdrv_find_base(top_bs
);
3284 if (base_bs
== NULL
) {
3285 error_setg(errp
, QERR_BASE_NOT_FOUND
, base
? base
: "NULL");
3289 assert(bdrv_get_aio_context(base_bs
) == aio_context
);
3291 for (iter
= top_bs
; iter
!= backing_bs(base_bs
); iter
= backing_bs(iter
)) {
3292 if (bdrv_op_is_blocked(iter
, BLOCK_OP_TYPE_COMMIT_TARGET
, errp
)) {
3297 /* Do not allow attempts to commit an image into itself */
3298 if (top_bs
== base_bs
) {
3299 error_setg(errp
, "cannot commit an image into itself");
3304 if (has_backing_file
) {
3305 error_setg(errp
, "'backing-file' specified,"
3306 " but 'top' is the active layer");
3309 commit_active_start(has_job_id
? job_id
: NULL
, bs
, base_bs
,
3310 JOB_DEFAULT
, speed
, on_error
,
3311 filter_node_name
, NULL
, NULL
, false, &local_err
);
3313 BlockDriverState
*overlay_bs
= bdrv_find_overlay(bs
, top_bs
);
3314 if (bdrv_op_is_blocked(overlay_bs
, BLOCK_OP_TYPE_COMMIT_TARGET
, errp
)) {
3317 commit_start(has_job_id
? job_id
: NULL
, bs
, base_bs
, top_bs
, speed
,
3318 on_error
, has_backing_file
? backing_file
: NULL
,
3319 filter_node_name
, &local_err
);
3321 if (local_err
!= NULL
) {
3322 error_propagate(errp
, local_err
);
3327 aio_context_release(aio_context
);
3330 static BlockJob
*do_drive_backup(DriveBackup
*backup
, JobTxn
*txn
,
3333 BlockDriverState
*bs
;
3334 BlockDriverState
*target_bs
;
3335 BlockDriverState
*source
= NULL
;
3336 BlockJob
*job
= NULL
;
3337 BdrvDirtyBitmap
*bmap
= NULL
;
3338 AioContext
*aio_context
;
3339 QDict
*options
= NULL
;
3340 Error
*local_err
= NULL
;
3341 int flags
, job_flags
= JOB_DEFAULT
;
3343 bool set_backing_hd
= false;
3345 if (!backup
->has_speed
) {
3348 if (!backup
->has_on_source_error
) {
3349 backup
->on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
3351 if (!backup
->has_on_target_error
) {
3352 backup
->on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
3354 if (!backup
->has_mode
) {
3355 backup
->mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
3357 if (!backup
->has_job_id
) {
3358 backup
->job_id
= NULL
;
3360 if (!backup
->has_auto_finalize
) {
3361 backup
->auto_finalize
= true;
3363 if (!backup
->has_auto_dismiss
) {
3364 backup
->auto_dismiss
= true;
3366 if (!backup
->has_compress
) {
3367 backup
->compress
= false;
3370 bs
= qmp_get_root_bs(backup
->device
, errp
);
3375 aio_context
= bdrv_get_aio_context(bs
);
3376 aio_context_acquire(aio_context
);
3378 if (!backup
->has_format
) {
3379 backup
->format
= backup
->mode
== NEW_IMAGE_MODE_EXISTING
?
3380 NULL
: (char*) bs
->drv
->format_name
;
3383 /* Early check to avoid creating target */
3384 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_BACKUP_SOURCE
, errp
)) {
3388 flags
= bs
->open_flags
| BDRV_O_RDWR
;
3390 /* See if we have a backing HD we can use to create our new image
3392 if (backup
->sync
== MIRROR_SYNC_MODE_TOP
) {
3393 source
= backing_bs(bs
);
3395 backup
->sync
= MIRROR_SYNC_MODE_FULL
;
3398 if (backup
->sync
== MIRROR_SYNC_MODE_NONE
) {
3400 flags
|= BDRV_O_NO_BACKING
;
3401 set_backing_hd
= true;
3404 size
= bdrv_getlength(bs
);
3406 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
3410 if (backup
->mode
!= NEW_IMAGE_MODE_EXISTING
) {
3411 assert(backup
->format
);
3413 bdrv_img_create(backup
->target
, backup
->format
, source
->filename
,
3414 source
->drv
->format_name
, NULL
,
3415 size
, flags
, false, &local_err
);
3417 bdrv_img_create(backup
->target
, backup
->format
, NULL
, NULL
, NULL
,
3418 size
, flags
, false, &local_err
);
3423 error_propagate(errp
, local_err
);
3427 if (backup
->format
) {
3429 options
= qdict_new();
3431 qdict_put_str(options
, "driver", backup
->format
);
3434 target_bs
= bdrv_open(backup
->target
, NULL
, options
, flags
, errp
);
3439 bdrv_set_aio_context(target_bs
, aio_context
);
3441 if (set_backing_hd
) {
3442 bdrv_set_backing_hd(target_bs
, source
, &local_err
);
3444 bdrv_unref(target_bs
);
3449 if (backup
->has_bitmap
) {
3450 bmap
= bdrv_find_dirty_bitmap(bs
, backup
->bitmap
);
3452 error_setg(errp
, "Bitmap '%s' could not be found", backup
->bitmap
);
3453 bdrv_unref(target_bs
);
3456 if (bdrv_dirty_bitmap_qmp_locked(bmap
)) {
3458 "Bitmap '%s' is currently locked and cannot be used for "
3459 "backup", backup
->bitmap
);
3463 if (!backup
->auto_finalize
) {
3464 job_flags
|= JOB_MANUAL_FINALIZE
;
3466 if (!backup
->auto_dismiss
) {
3467 job_flags
|= JOB_MANUAL_DISMISS
;
3470 job
= backup_job_create(backup
->job_id
, bs
, target_bs
, backup
->speed
,
3471 backup
->sync
, bmap
, backup
->compress
,
3472 backup
->on_source_error
, backup
->on_target_error
,
3473 job_flags
, NULL
, NULL
, txn
, &local_err
);
3474 bdrv_unref(target_bs
);
3475 if (local_err
!= NULL
) {
3476 error_propagate(errp
, local_err
);
3481 aio_context_release(aio_context
);
3485 void qmp_drive_backup(DriveBackup
*arg
, Error
**errp
)
3489 job
= do_drive_backup(arg
, NULL
, errp
);
3491 job_start(&job
->job
);
3495 BlockDeviceInfoList
*qmp_query_named_block_nodes(Error
**errp
)
3497 return bdrv_named_nodes_list(errp
);
3500 BlockJob
*do_blockdev_backup(BlockdevBackup
*backup
, JobTxn
*txn
,
3503 BlockDriverState
*bs
;
3504 BlockDriverState
*target_bs
;
3505 Error
*local_err
= NULL
;
3506 AioContext
*aio_context
;
3507 BlockJob
*job
= NULL
;
3508 int job_flags
= JOB_DEFAULT
;
3510 if (!backup
->has_speed
) {
3513 if (!backup
->has_on_source_error
) {
3514 backup
->on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
3516 if (!backup
->has_on_target_error
) {
3517 backup
->on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
3519 if (!backup
->has_job_id
) {
3520 backup
->job_id
= NULL
;
3522 if (!backup
->has_auto_finalize
) {
3523 backup
->auto_finalize
= true;
3525 if (!backup
->has_auto_dismiss
) {
3526 backup
->auto_dismiss
= true;
3528 if (!backup
->has_compress
) {
3529 backup
->compress
= false;
3532 bs
= bdrv_lookup_bs(backup
->device
, backup
->device
, errp
);
3537 aio_context
= bdrv_get_aio_context(bs
);
3538 aio_context_acquire(aio_context
);
3540 target_bs
= bdrv_lookup_bs(backup
->target
, backup
->target
, errp
);
3545 if (bdrv_get_aio_context(target_bs
) != aio_context
) {
3546 if (!bdrv_has_blk(target_bs
)) {
3547 /* The target BDS is not attached, we can safely move it to another
3549 bdrv_set_aio_context(target_bs
, aio_context
);
3551 error_setg(errp
, "Target is attached to a different thread from "
3556 if (!backup
->auto_finalize
) {
3557 job_flags
|= JOB_MANUAL_FINALIZE
;
3559 if (!backup
->auto_dismiss
) {
3560 job_flags
|= JOB_MANUAL_DISMISS
;
3562 job
= backup_job_create(backup
->job_id
, bs
, target_bs
, backup
->speed
,
3563 backup
->sync
, NULL
, backup
->compress
,
3564 backup
->on_source_error
, backup
->on_target_error
,
3565 job_flags
, NULL
, NULL
, txn
, &local_err
);
3566 if (local_err
!= NULL
) {
3567 error_propagate(errp
, local_err
);
3570 aio_context_release(aio_context
);
3574 void qmp_blockdev_backup(BlockdevBackup
*arg
, Error
**errp
)
3577 job
= do_blockdev_backup(arg
, NULL
, errp
);
3579 job_start(&job
->job
);
3583 /* Parameter check and block job starting for drive mirroring.
3584 * Caller should hold @device and @target's aio context (must be the same).
3586 static void blockdev_mirror_common(const char *job_id
, BlockDriverState
*bs
,
3587 BlockDriverState
*target
,
3588 bool has_replaces
, const char *replaces
,
3589 enum MirrorSyncMode sync
,
3590 BlockMirrorBackingMode backing_mode
,
3591 bool has_speed
, int64_t speed
,
3592 bool has_granularity
, uint32_t granularity
,
3593 bool has_buf_size
, int64_t buf_size
,
3594 bool has_on_source_error
,
3595 BlockdevOnError on_source_error
,
3596 bool has_on_target_error
,
3597 BlockdevOnError on_target_error
,
3598 bool has_unmap
, bool unmap
,
3599 bool has_filter_node_name
,
3600 const char *filter_node_name
,
3601 bool has_copy_mode
, MirrorCopyMode copy_mode
,
3608 if (!has_on_source_error
) {
3609 on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
3611 if (!has_on_target_error
) {
3612 on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
3614 if (!has_granularity
) {
3617 if (!has_buf_size
) {
3623 if (!has_filter_node_name
) {
3624 filter_node_name
= NULL
;
3626 if (!has_copy_mode
) {
3627 copy_mode
= MIRROR_COPY_MODE_BACKGROUND
;
3630 if (granularity
!= 0 && (granularity
< 512 || granularity
> 1048576 * 64)) {
3631 error_setg(errp
, QERR_INVALID_PARAMETER_VALUE
, "granularity",
3632 "a value in range [512B, 64MB]");
3635 if (granularity
& (granularity
- 1)) {
3636 error_setg(errp
, QERR_INVALID_PARAMETER_VALUE
, "granularity",
3641 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_MIRROR_SOURCE
, errp
)) {
3644 if (bdrv_op_is_blocked(target
, BLOCK_OP_TYPE_MIRROR_TARGET
, errp
)) {
3648 if (!bs
->backing
&& sync
== MIRROR_SYNC_MODE_TOP
) {
3649 sync
= MIRROR_SYNC_MODE_FULL
;
3652 /* pass the node name to replace to mirror start since it's loose coupling
3653 * and will allow to check whether the node still exist at mirror completion
3655 mirror_start(job_id
, bs
, target
,
3656 has_replaces
? replaces
: NULL
,
3657 speed
, granularity
, buf_size
, sync
, backing_mode
,
3658 on_source_error
, on_target_error
, unmap
, filter_node_name
,
3662 void qmp_drive_mirror(DriveMirror
*arg
, Error
**errp
)
3664 BlockDriverState
*bs
;
3665 BlockDriverState
*source
, *target_bs
;
3666 AioContext
*aio_context
;
3667 BlockMirrorBackingMode backing_mode
;
3668 Error
*local_err
= NULL
;
3669 QDict
*options
= NULL
;
3672 const char *format
= arg
->format
;
3674 bs
= qmp_get_root_bs(arg
->device
, errp
);
3679 /* Early check to avoid creating target */
3680 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_MIRROR_SOURCE
, errp
)) {
3684 aio_context
= bdrv_get_aio_context(bs
);
3685 aio_context_acquire(aio_context
);
3687 if (!arg
->has_mode
) {
3688 arg
->mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
3691 if (!arg
->has_format
) {
3692 format
= (arg
->mode
== NEW_IMAGE_MODE_EXISTING
3693 ? NULL
: bs
->drv
->format_name
);
3696 flags
= bs
->open_flags
| BDRV_O_RDWR
;
3697 source
= backing_bs(bs
);
3698 if (!source
&& arg
->sync
== MIRROR_SYNC_MODE_TOP
) {
3699 arg
->sync
= MIRROR_SYNC_MODE_FULL
;
3701 if (arg
->sync
== MIRROR_SYNC_MODE_NONE
) {
3705 size
= bdrv_getlength(bs
);
3707 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
3711 if (arg
->has_replaces
) {
3712 BlockDriverState
*to_replace_bs
;
3713 AioContext
*replace_aio_context
;
3714 int64_t replace_size
;
3716 if (!arg
->has_node_name
) {
3717 error_setg(errp
, "a node-name must be provided when replacing a"
3718 " named node of the graph");
3722 to_replace_bs
= check_to_replace_node(bs
, arg
->replaces
, &local_err
);
3724 if (!to_replace_bs
) {
3725 error_propagate(errp
, local_err
);
3729 replace_aio_context
= bdrv_get_aio_context(to_replace_bs
);
3730 aio_context_acquire(replace_aio_context
);
3731 replace_size
= bdrv_getlength(to_replace_bs
);
3732 aio_context_release(replace_aio_context
);
3734 if (size
!= replace_size
) {
3735 error_setg(errp
, "cannot replace image with a mirror image of "
3741 if (arg
->mode
== NEW_IMAGE_MODE_ABSOLUTE_PATHS
) {
3742 backing_mode
= MIRROR_SOURCE_BACKING_CHAIN
;
3744 backing_mode
= MIRROR_OPEN_BACKING_CHAIN
;
3747 /* Don't open backing image in create() */
3748 flags
|= BDRV_O_NO_BACKING
;
3750 if ((arg
->sync
== MIRROR_SYNC_MODE_FULL
|| !source
)
3751 && arg
->mode
!= NEW_IMAGE_MODE_EXISTING
)
3753 /* create new image w/o backing file */
3755 bdrv_img_create(arg
->target
, format
,
3756 NULL
, NULL
, NULL
, size
, flags
, false, &local_err
);
3758 switch (arg
->mode
) {
3759 case NEW_IMAGE_MODE_EXISTING
:
3761 case NEW_IMAGE_MODE_ABSOLUTE_PATHS
:
3762 /* create new image with backing file */
3763 bdrv_img_create(arg
->target
, format
,
3765 source
->drv
->format_name
,
3766 NULL
, size
, flags
, false, &local_err
);
3774 error_propagate(errp
, local_err
);
3778 options
= qdict_new();
3779 if (arg
->has_node_name
) {
3780 qdict_put_str(options
, "node-name", arg
->node_name
);
3783 qdict_put_str(options
, "driver", format
);
3786 /* Mirroring takes care of copy-on-write using the source's backing
3789 target_bs
= bdrv_open(arg
->target
, NULL
, options
, flags
, errp
);
3794 bdrv_set_aio_context(target_bs
, aio_context
);
3796 blockdev_mirror_common(arg
->has_job_id
? arg
->job_id
: NULL
, bs
, target_bs
,
3797 arg
->has_replaces
, arg
->replaces
, arg
->sync
,
3798 backing_mode
, arg
->has_speed
, arg
->speed
,
3799 arg
->has_granularity
, arg
->granularity
,
3800 arg
->has_buf_size
, arg
->buf_size
,
3801 arg
->has_on_source_error
, arg
->on_source_error
,
3802 arg
->has_on_target_error
, arg
->on_target_error
,
3803 arg
->has_unmap
, arg
->unmap
,
3805 arg
->has_copy_mode
, arg
->copy_mode
,
3807 bdrv_unref(target_bs
);
3808 error_propagate(errp
, local_err
);
3810 aio_context_release(aio_context
);
3813 void qmp_blockdev_mirror(bool has_job_id
, const char *job_id
,
3814 const char *device
, const char *target
,
3815 bool has_replaces
, const char *replaces
,
3816 MirrorSyncMode sync
,
3817 bool has_speed
, int64_t speed
,
3818 bool has_granularity
, uint32_t granularity
,
3819 bool has_buf_size
, int64_t buf_size
,
3820 bool has_on_source_error
,
3821 BlockdevOnError on_source_error
,
3822 bool has_on_target_error
,
3823 BlockdevOnError on_target_error
,
3824 bool has_filter_node_name
,
3825 const char *filter_node_name
,
3826 bool has_copy_mode
, MirrorCopyMode copy_mode
,
3829 BlockDriverState
*bs
;
3830 BlockDriverState
*target_bs
;
3831 AioContext
*aio_context
;
3832 BlockMirrorBackingMode backing_mode
= MIRROR_LEAVE_BACKING_CHAIN
;
3833 Error
*local_err
= NULL
;
3835 bs
= qmp_get_root_bs(device
, errp
);
3840 target_bs
= bdrv_lookup_bs(target
, target
, errp
);
3845 aio_context
= bdrv_get_aio_context(bs
);
3846 aio_context_acquire(aio_context
);
3848 bdrv_set_aio_context(target_bs
, aio_context
);
3850 blockdev_mirror_common(has_job_id
? job_id
: NULL
, bs
, target_bs
,
3851 has_replaces
, replaces
, sync
, backing_mode
,
3853 has_granularity
, granularity
,
3854 has_buf_size
, buf_size
,
3855 has_on_source_error
, on_source_error
,
3856 has_on_target_error
, on_target_error
,
3858 has_filter_node_name
, filter_node_name
,
3859 has_copy_mode
, copy_mode
,
3861 error_propagate(errp
, local_err
);
3863 aio_context_release(aio_context
);
3866 /* Get a block job using its ID and acquire its AioContext */
3867 static BlockJob
*find_block_job(const char *id
, AioContext
**aio_context
,
3874 *aio_context
= NULL
;
3876 job
= block_job_get(id
);
3879 error_set(errp
, ERROR_CLASS_DEVICE_NOT_ACTIVE
,
3880 "Block job '%s' not found", id
);
3884 *aio_context
= blk_get_aio_context(job
->blk
);
3885 aio_context_acquire(*aio_context
);
3890 void qmp_block_job_set_speed(const char *device
, int64_t speed
, Error
**errp
)
3892 AioContext
*aio_context
;
3893 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
3899 block_job_set_speed(job
, speed
, errp
);
3900 aio_context_release(aio_context
);
3903 void qmp_block_job_cancel(const char *device
,
3904 bool has_force
, bool force
, Error
**errp
)
3906 AioContext
*aio_context
;
3907 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
3917 if (job_user_paused(&job
->job
) && !force
) {
3918 error_setg(errp
, "The block job for device '%s' is currently paused",
3923 trace_qmp_block_job_cancel(job
);
3924 job_user_cancel(&job
->job
, force
, errp
);
3926 aio_context_release(aio_context
);
3929 void qmp_block_job_pause(const char *device
, Error
**errp
)
3931 AioContext
*aio_context
;
3932 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
3938 trace_qmp_block_job_pause(job
);
3939 job_user_pause(&job
->job
, errp
);
3940 aio_context_release(aio_context
);
3943 void qmp_block_job_resume(const char *device
, Error
**errp
)
3945 AioContext
*aio_context
;
3946 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
3952 trace_qmp_block_job_resume(job
);
3953 job_user_resume(&job
->job
, errp
);
3954 aio_context_release(aio_context
);
3957 void qmp_block_job_complete(const char *device
, Error
**errp
)
3959 AioContext
*aio_context
;
3960 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
3966 trace_qmp_block_job_complete(job
);
3967 job_complete(&job
->job
, errp
);
3968 aio_context_release(aio_context
);
3971 void qmp_block_job_finalize(const char *id
, Error
**errp
)
3973 AioContext
*aio_context
;
3974 BlockJob
*job
= find_block_job(id
, &aio_context
, errp
);
3980 trace_qmp_block_job_finalize(job
);
3981 job_finalize(&job
->job
, errp
);
3982 aio_context_release(aio_context
);
3985 void qmp_block_job_dismiss(const char *id
, Error
**errp
)
3987 AioContext
*aio_context
;
3988 BlockJob
*bjob
= find_block_job(id
, &aio_context
, errp
);
3995 trace_qmp_block_job_dismiss(bjob
);
3997 job_dismiss(&job
, errp
);
3998 aio_context_release(aio_context
);
4001 void qmp_change_backing_file(const char *device
,
4002 const char *image_node_name
,
4003 const char *backing_file
,
4006 BlockDriverState
*bs
= NULL
;
4007 AioContext
*aio_context
;
4008 BlockDriverState
*image_bs
= NULL
;
4009 Error
*local_err
= NULL
;
4014 bs
= qmp_get_root_bs(device
, errp
);
4019 aio_context
= bdrv_get_aio_context(bs
);
4020 aio_context_acquire(aio_context
);
4022 image_bs
= bdrv_lookup_bs(NULL
, image_node_name
, &local_err
);
4024 error_propagate(errp
, local_err
);
4029 error_setg(errp
, "image file not found");
4033 if (bdrv_find_base(image_bs
) == image_bs
) {
4034 error_setg(errp
, "not allowing backing file change on an image "
4035 "without a backing file");
4039 /* even though we are not necessarily operating on bs, we need it to
4040 * determine if block ops are currently prohibited on the chain */
4041 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_CHANGE
, errp
)) {
4045 /* final sanity check */
4046 if (!bdrv_chain_contains(bs
, image_bs
)) {
4047 error_setg(errp
, "'%s' and image file are not in the same chain",
4052 /* if not r/w, reopen to make r/w */
4053 open_flags
= image_bs
->open_flags
;
4054 ro
= bdrv_is_read_only(image_bs
);
4057 bdrv_reopen(image_bs
, open_flags
| BDRV_O_RDWR
, &local_err
);
4059 error_propagate(errp
, local_err
);
4064 ret
= bdrv_change_backing_file(image_bs
, backing_file
,
4065 image_bs
->drv
? image_bs
->drv
->format_name
: "");
4068 error_setg_errno(errp
, -ret
, "Could not change backing file to '%s'",
4070 /* don't exit here, so we can try to restore open flags if
4075 bdrv_reopen(image_bs
, open_flags
, &local_err
);
4076 error_propagate(errp
, local_err
);
4080 aio_context_release(aio_context
);
4083 void hmp_drive_add_node(Monitor
*mon
, const char *optstr
)
4087 Error
*local_err
= NULL
;
4089 opts
= qemu_opts_parse_noisily(&qemu_drive_opts
, optstr
, false);
4094 qdict
= qemu_opts_to_qdict(opts
, NULL
);
4096 if (!qdict_get_try_str(qdict
, "node-name")) {
4097 qobject_unref(qdict
);
4098 error_report("'node-name' needs to be specified");
4102 BlockDriverState
*bs
= bds_tree_init(qdict
, &local_err
);
4104 error_report_err(local_err
);
4108 QTAILQ_INSERT_TAIL(&monitor_bdrv_states
, bs
, monitor_list
);
4111 qemu_opts_del(opts
);
4114 void qmp_blockdev_add(BlockdevOptions
*options
, Error
**errp
)
4116 BlockDriverState
*bs
;
4118 Visitor
*v
= qobject_output_visitor_new(&obj
);
4120 Error
*local_err
= NULL
;
4122 visit_type_BlockdevOptions(v
, NULL
, &options
, &local_err
);
4124 error_propagate(errp
, local_err
);
4128 visit_complete(v
, &obj
);
4129 qdict
= qobject_to(QDict
, obj
);
4131 qdict_flatten(qdict
);
4133 if (!qdict_get_try_str(qdict
, "node-name")) {
4134 error_setg(errp
, "'node-name' must be specified for the root node");
4138 bs
= bds_tree_init(qdict
, errp
);
4143 QTAILQ_INSERT_TAIL(&monitor_bdrv_states
, bs
, monitor_list
);
4149 void qmp_blockdev_del(const char *node_name
, Error
**errp
)
4151 AioContext
*aio_context
;
4152 BlockDriverState
*bs
;
4154 bs
= bdrv_find_node(node_name
);
4156 error_setg(errp
, "Cannot find node %s", node_name
);
4159 if (bdrv_has_blk(bs
)) {
4160 error_setg(errp
, "Node %s is in use", node_name
);
4163 aio_context
= bdrv_get_aio_context(bs
);
4164 aio_context_acquire(aio_context
);
4166 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_DRIVE_DEL
, errp
)) {
4170 if (!bs
->monitor_list
.tqe_prev
) {
4171 error_setg(errp
, "Node %s is not owned by the monitor",
4176 if (bs
->refcnt
> 1) {
4177 error_setg(errp
, "Block device %s is in use",
4178 bdrv_get_device_or_node_name(bs
));
4182 QTAILQ_REMOVE(&monitor_bdrv_states
, bs
, monitor_list
);
4186 aio_context_release(aio_context
);
4189 static BdrvChild
*bdrv_find_child(BlockDriverState
*parent_bs
,
4190 const char *child_name
)
4194 QLIST_FOREACH(child
, &parent_bs
->children
, next
) {
4195 if (strcmp(child
->name
, child_name
) == 0) {
4203 void qmp_x_blockdev_change(const char *parent
, bool has_child
,
4204 const char *child
, bool has_node
,
4205 const char *node
, Error
**errp
)
4207 BlockDriverState
*parent_bs
, *new_bs
= NULL
;
4210 parent_bs
= bdrv_lookup_bs(parent
, parent
, errp
);
4215 if (has_child
== has_node
) {
4217 error_setg(errp
, "The parameters child and node are in conflict");
4219 error_setg(errp
, "Either child or node must be specified");
4225 p_child
= bdrv_find_child(parent_bs
, child
);
4227 error_setg(errp
, "Node '%s' does not have child '%s'",
4231 bdrv_del_child(parent_bs
, p_child
, errp
);
4235 new_bs
= bdrv_find_node(node
);
4237 error_setg(errp
, "Node '%s' not found", node
);
4240 bdrv_add_child(parent_bs
, new_bs
, errp
);
4244 BlockJobInfoList
*qmp_query_block_jobs(Error
**errp
)
4246 BlockJobInfoList
*head
= NULL
, **p_next
= &head
;
4249 for (job
= block_job_next(NULL
); job
; job
= block_job_next(job
)) {
4250 BlockJobInfoList
*elem
;
4251 AioContext
*aio_context
;
4253 if (block_job_is_internal(job
)) {
4256 elem
= g_new0(BlockJobInfoList
, 1);
4257 aio_context
= blk_get_aio_context(job
->blk
);
4258 aio_context_acquire(aio_context
);
4259 elem
->value
= block_job_query(job
, errp
);
4260 aio_context_release(aio_context
);
4263 qapi_free_BlockJobInfoList(head
);
4267 p_next
= &elem
->next
;
4273 void qmp_x_blockdev_set_iothread(const char *node_name
, StrOrNull
*iothread
,
4274 bool has_force
, bool force
, Error
**errp
)
4276 AioContext
*old_context
;
4277 AioContext
*new_context
;
4278 BlockDriverState
*bs
;
4280 bs
= bdrv_find_node(node_name
);
4282 error_setg(errp
, "Cannot find node %s", node_name
);
4286 /* Protects against accidents. */
4287 if (!(has_force
&& force
) && bdrv_has_blk(bs
)) {
4288 error_setg(errp
, "Node %s is associated with a BlockBackend and could "
4289 "be in use (use force=true to override this check)",
4294 if (iothread
->type
== QTYPE_QSTRING
) {
4295 IOThread
*obj
= iothread_by_id(iothread
->u
.s
);
4297 error_setg(errp
, "Cannot find iothread %s", iothread
->u
.s
);
4301 new_context
= iothread_get_aio_context(obj
);
4303 new_context
= qemu_get_aio_context();
4306 old_context
= bdrv_get_aio_context(bs
);
4307 aio_context_acquire(old_context
);
4309 bdrv_set_aio_context(bs
, new_context
);
4311 aio_context_release(old_context
);
4314 void qmp_x_block_latency_histogram_set(
4316 bool has_boundaries
, uint64List
*boundaries
,
4317 bool has_boundaries_read
, uint64List
*boundaries_read
,
4318 bool has_boundaries_write
, uint64List
*boundaries_write
,
4319 bool has_boundaries_flush
, uint64List
*boundaries_flush
,
4322 BlockBackend
*blk
= blk_by_name(device
);
4323 BlockAcctStats
*stats
;
4326 error_setg(errp
, "Device '%s' not found", device
);
4329 stats
= blk_get_stats(blk
);
4331 if (!has_boundaries
&& !has_boundaries_read
&& !has_boundaries_write
&&
4332 !has_boundaries_flush
)
4334 block_latency_histograms_clear(stats
);
4338 if (has_boundaries
|| has_boundaries_read
) {
4339 block_latency_histogram_set(
4340 stats
, BLOCK_ACCT_READ
,
4341 has_boundaries_read
? boundaries_read
: boundaries
);
4344 if (has_boundaries
|| has_boundaries_write
) {
4345 block_latency_histogram_set(
4346 stats
, BLOCK_ACCT_WRITE
,
4347 has_boundaries_write
? boundaries_write
: boundaries
);
4350 if (has_boundaries
|| has_boundaries_flush
) {
4351 block_latency_histogram_set(
4352 stats
, BLOCK_ACCT_FLUSH
,
4353 has_boundaries_flush
? boundaries_flush
: boundaries
);
4357 QemuOptsList qemu_common_drive_opts
= {
4359 .head
= QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts
.head
),
4363 .type
= QEMU_OPT_BOOL
,
4364 .help
= "enable/disable snapshot mode",
4367 .type
= QEMU_OPT_STRING
,
4368 .help
= "host AIO implementation (threads, native)",
4370 .name
= BDRV_OPT_CACHE_WB
,
4371 .type
= QEMU_OPT_BOOL
,
4372 .help
= "Enable writeback mode",
4375 .type
= QEMU_OPT_STRING
,
4376 .help
= "disk format (raw, qcow2, ...)",
4379 .type
= QEMU_OPT_STRING
,
4380 .help
= "read error action",
4383 .type
= QEMU_OPT_STRING
,
4384 .help
= "write error action",
4386 .name
= BDRV_OPT_READ_ONLY
,
4387 .type
= QEMU_OPT_BOOL
,
4388 .help
= "open drive file as read-only",
4394 .name
= "throttling.group",
4395 .type
= QEMU_OPT_STRING
,
4396 .help
= "name of the block throttling group",
4398 .name
= "copy-on-read",
4399 .type
= QEMU_OPT_BOOL
,
4400 .help
= "copy read data from backing file into image file",
4402 .name
= "detect-zeroes",
4403 .type
= QEMU_OPT_STRING
,
4404 .help
= "try to optimize zero writes (off, on, unmap)",
4406 .name
= "stats-account-invalid",
4407 .type
= QEMU_OPT_BOOL
,
4408 .help
= "whether to account for invalid I/O operations "
4409 "in the statistics",
4411 .name
= "stats-account-failed",
4412 .type
= QEMU_OPT_BOOL
,
4413 .help
= "whether to account for failed I/O operations "
4414 "in the statistics",
4416 { /* end of list */ }
4420 QemuOptsList qemu_drive_opts
= {
4422 .head
= QTAILQ_HEAD_INITIALIZER(qemu_drive_opts
.head
),
4425 * no elements => accept any params
4426 * validation will happen later
4428 { /* end of list */ }