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_NUMBER
,
736 .help
= "number of cylinders (ide disk geometry)",
739 .type
= QEMU_OPT_NUMBER
,
740 .help
= "number of heads (ide disk geometry)",
743 .type
= QEMU_OPT_NUMBER
,
744 .help
= "number of sectors (ide disk geometry)",
747 .type
= QEMU_OPT_STRING
,
748 .help
= "chs translation (auto, lba, none)",
751 .type
= QEMU_OPT_STRING
,
752 .help
= "pci address (virtio only)",
755 .type
= QEMU_OPT_STRING
,
756 .help
= "disk serial number",
759 .type
= QEMU_OPT_STRING
,
763 /* Options that are passed on, but have special semantics with -drive */
765 .name
= BDRV_OPT_READ_ONLY
,
766 .type
= QEMU_OPT_BOOL
,
767 .help
= "open drive file as read-only",
770 .type
= QEMU_OPT_STRING
,
771 .help
= "read error action",
774 .type
= QEMU_OPT_STRING
,
775 .help
= "write error action",
777 .name
= "copy-on-read",
778 .type
= QEMU_OPT_BOOL
,
779 .help
= "copy read data from backing file into image file",
782 { /* end of list */ }
786 DriveInfo
*drive_new(QemuOpts
*all_opts
, BlockInterfaceType block_default_type
)
790 DriveInfo
*dinfo
= NULL
;
792 QemuOpts
*legacy_opts
;
793 DriveMediaType media
= MEDIA_DISK
;
794 BlockInterfaceType type
;
795 int cyls
, heads
, secs
, translation
;
796 int max_devs
, bus_id
, unit_id
, index
;
798 const char *werror
, *rerror
;
799 bool read_only
= false;
802 const char *filename
;
803 Error
*local_err
= NULL
;
805 const char *deprecated
[] = {
806 "serial", "trans", "secs", "heads", "cyls", "addr"
809 /* Change legacy command line options into QMP ones */
810 static const struct {
814 { "iops", "throttling.iops-total" },
815 { "iops_rd", "throttling.iops-read" },
816 { "iops_wr", "throttling.iops-write" },
818 { "bps", "throttling.bps-total" },
819 { "bps_rd", "throttling.bps-read" },
820 { "bps_wr", "throttling.bps-write" },
822 { "iops_max", "throttling.iops-total-max" },
823 { "iops_rd_max", "throttling.iops-read-max" },
824 { "iops_wr_max", "throttling.iops-write-max" },
826 { "bps_max", "throttling.bps-total-max" },
827 { "bps_rd_max", "throttling.bps-read-max" },
828 { "bps_wr_max", "throttling.bps-write-max" },
830 { "iops_size", "throttling.iops-size" },
832 { "group", "throttling.group" },
834 { "readonly", BDRV_OPT_READ_ONLY
},
837 for (i
= 0; i
< ARRAY_SIZE(opt_renames
); i
++) {
838 qemu_opt_rename(all_opts
, opt_renames
[i
].from
, opt_renames
[i
].to
,
841 error_report_err(local_err
);
846 value
= qemu_opt_get(all_opts
, "cache");
851 if (bdrv_parse_cache_mode(value
, &flags
, &writethrough
) != 0) {
852 error_report("invalid cache option");
856 /* Specific options take precedence */
857 if (!qemu_opt_get(all_opts
, BDRV_OPT_CACHE_WB
)) {
858 qemu_opt_set_bool(all_opts
, BDRV_OPT_CACHE_WB
,
859 !writethrough
, &error_abort
);
861 if (!qemu_opt_get(all_opts
, BDRV_OPT_CACHE_DIRECT
)) {
862 qemu_opt_set_bool(all_opts
, BDRV_OPT_CACHE_DIRECT
,
863 !!(flags
& BDRV_O_NOCACHE
), &error_abort
);
865 if (!qemu_opt_get(all_opts
, BDRV_OPT_CACHE_NO_FLUSH
)) {
866 qemu_opt_set_bool(all_opts
, BDRV_OPT_CACHE_NO_FLUSH
,
867 !!(flags
& BDRV_O_NO_FLUSH
), &error_abort
);
869 qemu_opt_unset(all_opts
, "cache");
872 /* Get a QDict for processing the options */
873 bs_opts
= qdict_new();
874 qemu_opts_to_qdict(all_opts
, bs_opts
);
876 legacy_opts
= qemu_opts_create(&qemu_legacy_drive_opts
, NULL
, 0,
878 qemu_opts_absorb_qdict(legacy_opts
, bs_opts
, &local_err
);
880 error_report_err(local_err
);
884 /* Other deprecated options */
885 if (!qtest_enabled()) {
886 for (i
= 0; i
< ARRAY_SIZE(deprecated
); i
++) {
887 if (qemu_opt_get(legacy_opts
, deprecated
[i
]) != NULL
) {
888 error_report("'%s' is deprecated, please use the corresponding "
889 "option of '-device' instead", deprecated
[i
]);
895 value
= qemu_opt_get(legacy_opts
, "media");
897 if (!strcmp(value
, "disk")) {
899 } else if (!strcmp(value
, "cdrom")) {
903 error_report("'%s' invalid media", value
);
908 /* copy-on-read is disabled with a warning for read-only devices */
909 read_only
|= qemu_opt_get_bool(legacy_opts
, BDRV_OPT_READ_ONLY
, false);
910 copy_on_read
= qemu_opt_get_bool(legacy_opts
, "copy-on-read", false);
912 if (read_only
&& copy_on_read
) {
913 warn_report("disabling copy-on-read on read-only drive");
914 copy_on_read
= false;
917 qdict_put_str(bs_opts
, BDRV_OPT_READ_ONLY
, read_only
? "on" : "off");
918 qdict_put_str(bs_opts
, "copy-on-read", copy_on_read
? "on" : "off");
920 /* Controller type */
921 value
= qemu_opt_get(legacy_opts
, "if");
924 type
< IF_COUNT
&& strcmp(value
, if_name
[type
]);
927 if (type
== IF_COUNT
) {
928 error_report("unsupported bus type '%s'", value
);
932 type
= block_default_type
;
936 cyls
= qemu_opt_get_number(legacy_opts
, "cyls", 0);
937 heads
= qemu_opt_get_number(legacy_opts
, "heads", 0);
938 secs
= qemu_opt_get_number(legacy_opts
, "secs", 0);
940 if (cyls
|| heads
|| secs
) {
942 error_report("invalid physical cyls number");
946 error_report("invalid physical heads number");
950 error_report("invalid physical secs number");
955 translation
= BIOS_ATA_TRANSLATION_AUTO
;
956 value
= qemu_opt_get(legacy_opts
, "trans");
959 error_report("'%s' trans must be used with cyls, heads and secs",
963 if (!strcmp(value
, "none")) {
964 translation
= BIOS_ATA_TRANSLATION_NONE
;
965 } else if (!strcmp(value
, "lba")) {
966 translation
= BIOS_ATA_TRANSLATION_LBA
;
967 } else if (!strcmp(value
, "large")) {
968 translation
= BIOS_ATA_TRANSLATION_LARGE
;
969 } else if (!strcmp(value
, "rechs")) {
970 translation
= BIOS_ATA_TRANSLATION_RECHS
;
971 } else if (!strcmp(value
, "auto")) {
972 translation
= BIOS_ATA_TRANSLATION_AUTO
;
974 error_report("'%s' invalid translation type", value
);
979 if (media
== MEDIA_CDROM
) {
980 if (cyls
|| secs
|| heads
) {
981 error_report("CHS can't be set with media=cdrom");
986 /* Device address specified by bus/unit or index.
987 * If none was specified, try to find the first free one. */
988 bus_id
= qemu_opt_get_number(legacy_opts
, "bus", 0);
989 unit_id
= qemu_opt_get_number(legacy_opts
, "unit", -1);
990 index
= qemu_opt_get_number(legacy_opts
, "index", -1);
992 max_devs
= if_max_devs
[type
];
995 if (bus_id
!= 0 || unit_id
!= -1) {
996 error_report("index cannot be used with bus and unit");
999 bus_id
= drive_index_to_bus_id(type
, index
);
1000 unit_id
= drive_index_to_unit_id(type
, index
);
1003 if (unit_id
== -1) {
1005 while (drive_get(type
, bus_id
, unit_id
) != NULL
) {
1007 if (max_devs
&& unit_id
>= max_devs
) {
1008 unit_id
-= max_devs
;
1014 if (max_devs
&& unit_id
>= max_devs
) {
1015 error_report("unit %d too big (max is %d)", unit_id
, max_devs
- 1);
1019 if (drive_get(type
, bus_id
, unit_id
) != NULL
) {
1020 error_report("drive with bus=%d, unit=%d (index=%d) exists",
1021 bus_id
, unit_id
, index
);
1026 serial
= qemu_opt_get(legacy_opts
, "serial");
1028 /* no id supplied -> create one */
1029 if (qemu_opts_id(all_opts
) == NULL
) {
1031 const char *mediastr
= "";
1032 if (type
== IF_IDE
|| type
== IF_SCSI
) {
1033 mediastr
= (media
== MEDIA_CDROM
) ? "-cd" : "-hd";
1036 new_id
= g_strdup_printf("%s%i%s%i", if_name
[type
], bus_id
,
1039 new_id
= g_strdup_printf("%s%s%i", if_name
[type
],
1042 qdict_put_str(bs_opts
, "id", new_id
);
1046 /* Add virtio block device */
1047 devaddr
= qemu_opt_get(legacy_opts
, "addr");
1048 if (devaddr
&& type
!= IF_VIRTIO
) {
1049 error_report("addr is not supported by this bus type");
1053 if (type
== IF_VIRTIO
) {
1055 devopts
= qemu_opts_create(qemu_find_opts("device"), NULL
, 0,
1057 if (arch_type
== QEMU_ARCH_S390X
) {
1058 qemu_opt_set(devopts
, "driver", "virtio-blk-ccw", &error_abort
);
1060 qemu_opt_set(devopts
, "driver", "virtio-blk-pci", &error_abort
);
1062 qemu_opt_set(devopts
, "drive", qdict_get_str(bs_opts
, "id"),
1065 qemu_opt_set(devopts
, "addr", devaddr
, &error_abort
);
1069 filename
= qemu_opt_get(legacy_opts
, "file");
1071 /* Check werror/rerror compatibility with if=... */
1072 werror
= qemu_opt_get(legacy_opts
, "werror");
1073 if (werror
!= NULL
) {
1074 if (type
!= IF_IDE
&& type
!= IF_SCSI
&& type
!= IF_VIRTIO
&&
1076 error_report("werror is not supported by this bus type");
1079 qdict_put_str(bs_opts
, "werror", werror
);
1082 rerror
= qemu_opt_get(legacy_opts
, "rerror");
1083 if (rerror
!= NULL
) {
1084 if (type
!= IF_IDE
&& type
!= IF_VIRTIO
&& type
!= IF_SCSI
&&
1086 error_report("rerror is not supported by this bus type");
1089 qdict_put_str(bs_opts
, "rerror", rerror
);
1092 /* Actual block device init: Functionality shared with blockdev-add */
1093 blk
= blockdev_init(filename
, bs_opts
, &local_err
);
1097 error_report_err(local_err
);
1104 /* Create legacy DriveInfo */
1105 dinfo
= g_malloc0(sizeof(*dinfo
));
1106 dinfo
->opts
= all_opts
;
1109 dinfo
->heads
= heads
;
1111 dinfo
->trans
= translation
;
1114 dinfo
->bus
= bus_id
;
1115 dinfo
->unit
= unit_id
;
1116 dinfo
->devaddr
= devaddr
;
1117 dinfo
->serial
= g_strdup(serial
);
1119 blk_set_legacy_dinfo(blk
, dinfo
);
1126 dinfo
->media_cd
= media
== MEDIA_CDROM
;
1133 qemu_opts_del(legacy_opts
);
1134 qobject_unref(bs_opts
);
1138 static BlockDriverState
*qmp_get_root_bs(const char *name
, Error
**errp
)
1140 BlockDriverState
*bs
;
1142 bs
= bdrv_lookup_bs(name
, name
, errp
);
1147 if (!bdrv_is_root_node(bs
)) {
1148 error_setg(errp
, "Need a root block node");
1152 if (!bdrv_is_inserted(bs
)) {
1153 error_setg(errp
, "Device has no medium");
1160 static BlockBackend
*qmp_get_blk(const char *blk_name
, const char *qdev_id
,
1165 if (!blk_name
== !qdev_id
) {
1166 error_setg(errp
, "Need exactly one of 'device' and 'id'");
1171 blk
= blk_by_qdev_id(qdev_id
, errp
);
1173 blk
= blk_by_name(blk_name
);
1175 error_set(errp
, ERROR_CLASS_DEVICE_NOT_FOUND
,
1176 "Device '%s' not found", blk_name
);
1183 void hmp_commit(Monitor
*mon
, const QDict
*qdict
)
1185 const char *device
= qdict_get_str(qdict
, "device");
1189 if (!strcmp(device
, "all")) {
1190 ret
= blk_commit_all();
1192 BlockDriverState
*bs
;
1193 AioContext
*aio_context
;
1195 blk
= blk_by_name(device
);
1197 monitor_printf(mon
, "Device '%s' not found\n", device
);
1200 if (!blk_is_available(blk
)) {
1201 monitor_printf(mon
, "Device '%s' has no medium\n", device
);
1206 aio_context
= bdrv_get_aio_context(bs
);
1207 aio_context_acquire(aio_context
);
1209 ret
= bdrv_commit(bs
);
1211 aio_context_release(aio_context
);
1214 monitor_printf(mon
, "'commit' error for '%s': %s\n", device
,
1219 static void blockdev_do_action(TransactionAction
*action
, Error
**errp
)
1221 TransactionActionList list
;
1223 list
.value
= action
;
1225 qmp_transaction(&list
, false, NULL
, errp
);
1228 void qmp_blockdev_snapshot_sync(bool has_device
, const char *device
,
1229 bool has_node_name
, const char *node_name
,
1230 const char *snapshot_file
,
1231 bool has_snapshot_node_name
,
1232 const char *snapshot_node_name
,
1233 bool has_format
, const char *format
,
1234 bool has_mode
, NewImageMode mode
, Error
**errp
)
1236 BlockdevSnapshotSync snapshot
= {
1237 .has_device
= has_device
,
1238 .device
= (char *) device
,
1239 .has_node_name
= has_node_name
,
1240 .node_name
= (char *) node_name
,
1241 .snapshot_file
= (char *) snapshot_file
,
1242 .has_snapshot_node_name
= has_snapshot_node_name
,
1243 .snapshot_node_name
= (char *) snapshot_node_name
,
1244 .has_format
= has_format
,
1245 .format
= (char *) format
,
1246 .has_mode
= has_mode
,
1249 TransactionAction action
= {
1250 .type
= TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
,
1251 .u
.blockdev_snapshot_sync
.data
= &snapshot
,
1253 blockdev_do_action(&action
, errp
);
1256 void qmp_blockdev_snapshot(const char *node
, const char *overlay
,
1259 BlockdevSnapshot snapshot_data
= {
1260 .node
= (char *) node
,
1261 .overlay
= (char *) overlay
1263 TransactionAction action
= {
1264 .type
= TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT
,
1265 .u
.blockdev_snapshot
.data
= &snapshot_data
,
1267 blockdev_do_action(&action
, errp
);
1270 void qmp_blockdev_snapshot_internal_sync(const char *device
,
1274 BlockdevSnapshotInternal snapshot
= {
1275 .device
= (char *) device
,
1276 .name
= (char *) name
1278 TransactionAction action
= {
1279 .type
= TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
,
1280 .u
.blockdev_snapshot_internal_sync
.data
= &snapshot
,
1282 blockdev_do_action(&action
, errp
);
1285 SnapshotInfo
*qmp_blockdev_snapshot_delete_internal_sync(const char *device
,
1292 BlockDriverState
*bs
;
1293 AioContext
*aio_context
;
1294 QEMUSnapshotInfo sn
;
1295 Error
*local_err
= NULL
;
1296 SnapshotInfo
*info
= NULL
;
1299 bs
= qmp_get_root_bs(device
, errp
);
1303 aio_context
= bdrv_get_aio_context(bs
);
1304 aio_context_acquire(aio_context
);
1315 error_setg(errp
, "Name or id must be provided");
1316 goto out_aio_context
;
1319 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE
, errp
)) {
1320 goto out_aio_context
;
1323 ret
= bdrv_snapshot_find_by_id_and_name(bs
, id
, name
, &sn
, &local_err
);
1325 error_propagate(errp
, local_err
);
1326 goto out_aio_context
;
1330 "Snapshot with id '%s' and name '%s' does not exist on "
1332 STR_OR_NULL(id
), STR_OR_NULL(name
), device
);
1333 goto out_aio_context
;
1336 bdrv_snapshot_delete(bs
, id
, name
, &local_err
);
1338 error_propagate(errp
, local_err
);
1339 goto out_aio_context
;
1342 aio_context_release(aio_context
);
1344 info
= g_new0(SnapshotInfo
, 1);
1345 info
->id
= g_strdup(sn
.id_str
);
1346 info
->name
= g_strdup(sn
.name
);
1347 info
->date_nsec
= sn
.date_nsec
;
1348 info
->date_sec
= sn
.date_sec
;
1349 info
->vm_state_size
= sn
.vm_state_size
;
1350 info
->vm_clock_nsec
= sn
.vm_clock_nsec
% 1000000000;
1351 info
->vm_clock_sec
= sn
.vm_clock_nsec
/ 1000000000;
1356 aio_context_release(aio_context
);
1361 * block_dirty_bitmap_lookup:
1362 * Return a dirty bitmap (if present), after validating
1363 * the node reference and bitmap names.
1365 * @node: The name of the BDS node to search for bitmaps
1366 * @name: The name of the bitmap to search for
1367 * @pbs: Output pointer for BDS lookup, if desired. Can be NULL.
1368 * @paio: Output pointer for aio_context acquisition, if desired. Can be NULL.
1369 * @errp: Output pointer for error information. Can be NULL.
1371 * @return: A bitmap object on success, or NULL on failure.
1373 static BdrvDirtyBitmap
*block_dirty_bitmap_lookup(const char *node
,
1375 BlockDriverState
**pbs
,
1378 BlockDriverState
*bs
;
1379 BdrvDirtyBitmap
*bitmap
;
1382 error_setg(errp
, "Node cannot be NULL");
1386 error_setg(errp
, "Bitmap name cannot be NULL");
1389 bs
= bdrv_lookup_bs(node
, node
, NULL
);
1391 error_setg(errp
, "Node '%s' not found", node
);
1395 bitmap
= bdrv_find_dirty_bitmap(bs
, name
);
1397 error_setg(errp
, "Dirty bitmap '%s' not found", name
);
1408 /* New and old BlockDriverState structs for atomic group operations */
1410 typedef struct BlkActionState BlkActionState
;
1414 * Table of operations that define an Action.
1416 * @instance_size: Size of state struct, in bytes.
1417 * @prepare: Prepare the work, must NOT be NULL.
1418 * @commit: Commit the changes, can be NULL.
1419 * @abort: Abort the changes on fail, can be NULL.
1420 * @clean: Clean up resources after all transaction actions have called
1421 * commit() or abort(). Can be NULL.
1423 * Only prepare() may fail. In a single transaction, only one of commit() or
1424 * abort() will be called. clean() will always be called if it is present.
1426 typedef struct BlkActionOps
{
1427 size_t instance_size
;
1428 void (*prepare
)(BlkActionState
*common
, Error
**errp
);
1429 void (*commit
)(BlkActionState
*common
);
1430 void (*abort
)(BlkActionState
*common
);
1431 void (*clean
)(BlkActionState
*common
);
1436 * Describes one Action's state within a Transaction.
1438 * @action: QAPI-defined enum identifying which Action to perform.
1439 * @ops: Table of ActionOps this Action can perform.
1440 * @block_job_txn: Transaction which this action belongs to.
1441 * @entry: List membership for all Actions in this Transaction.
1443 * This structure must be arranged as first member in a subclassed type,
1444 * assuming that the compiler will also arrange it to the same offsets as the
1447 struct BlkActionState
{
1448 TransactionAction
*action
;
1449 const BlkActionOps
*ops
;
1450 JobTxn
*block_job_txn
;
1451 TransactionProperties
*txn_props
;
1452 QSIMPLEQ_ENTRY(BlkActionState
) entry
;
1455 /* internal snapshot private data */
1456 typedef struct InternalSnapshotState
{
1457 BlkActionState common
;
1458 BlockDriverState
*bs
;
1459 QEMUSnapshotInfo sn
;
1461 } InternalSnapshotState
;
1464 static int action_check_completion_mode(BlkActionState
*s
, Error
**errp
)
1466 if (s
->txn_props
->completion_mode
!= ACTION_COMPLETION_MODE_INDIVIDUAL
) {
1468 "Action '%s' does not support Transaction property "
1469 "completion-mode = %s",
1470 TransactionActionKind_str(s
->action
->type
),
1471 ActionCompletionMode_str(s
->txn_props
->completion_mode
));
1477 static void internal_snapshot_prepare(BlkActionState
*common
,
1480 Error
*local_err
= NULL
;
1483 BlockDriverState
*bs
;
1484 QEMUSnapshotInfo old_sn
, *sn
;
1487 BlockdevSnapshotInternal
*internal
;
1488 InternalSnapshotState
*state
;
1489 AioContext
*aio_context
;
1492 g_assert(common
->action
->type
==
1493 TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
);
1494 internal
= common
->action
->u
.blockdev_snapshot_internal_sync
.data
;
1495 state
= DO_UPCAST(InternalSnapshotState
, common
, common
);
1497 /* 1. parse input */
1498 device
= internal
->device
;
1499 name
= internal
->name
;
1501 /* 2. check for validation */
1502 if (action_check_completion_mode(common
, errp
) < 0) {
1506 bs
= qmp_get_root_bs(device
, errp
);
1511 aio_context
= bdrv_get_aio_context(bs
);
1512 aio_context_acquire(aio_context
);
1516 /* Paired with .clean() */
1517 bdrv_drained_begin(bs
);
1519 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT
, errp
)) {
1523 if (bdrv_is_read_only(bs
)) {
1524 error_setg(errp
, "Device '%s' is read only", device
);
1528 if (!bdrv_can_snapshot(bs
)) {
1529 error_setg(errp
, "Block format '%s' used by device '%s' "
1530 "does not support internal snapshots",
1531 bs
->drv
->format_name
, device
);
1535 if (!strlen(name
)) {
1536 error_setg(errp
, "Name is empty");
1540 /* check whether a snapshot with name exist */
1541 ret
= bdrv_snapshot_find_by_id_and_name(bs
, NULL
, name
, &old_sn
,
1544 error_propagate(errp
, local_err
);
1548 "Snapshot with name '%s' already exists on device '%s'",
1553 /* 3. take the snapshot */
1555 pstrcpy(sn
->name
, sizeof(sn
->name
), name
);
1556 qemu_gettimeofday(&tv
);
1557 sn
->date_sec
= tv
.tv_sec
;
1558 sn
->date_nsec
= tv
.tv_usec
* 1000;
1559 sn
->vm_clock_nsec
= qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
);
1561 ret1
= bdrv_snapshot_create(bs
, sn
);
1563 error_setg_errno(errp
, -ret1
,
1564 "Failed to create snapshot '%s' on device '%s'",
1569 /* 4. succeed, mark a snapshot is created */
1570 state
->created
= true;
1573 aio_context_release(aio_context
);
1576 static void internal_snapshot_abort(BlkActionState
*common
)
1578 InternalSnapshotState
*state
=
1579 DO_UPCAST(InternalSnapshotState
, common
, common
);
1580 BlockDriverState
*bs
= state
->bs
;
1581 QEMUSnapshotInfo
*sn
= &state
->sn
;
1582 AioContext
*aio_context
;
1583 Error
*local_error
= NULL
;
1585 if (!state
->created
) {
1589 aio_context
= bdrv_get_aio_context(state
->bs
);
1590 aio_context_acquire(aio_context
);
1592 if (bdrv_snapshot_delete(bs
, sn
->id_str
, sn
->name
, &local_error
) < 0) {
1593 error_reportf_err(local_error
,
1594 "Failed to delete snapshot with id '%s' and "
1595 "name '%s' on device '%s' in abort: ",
1596 sn
->id_str
, sn
->name
,
1597 bdrv_get_device_name(bs
));
1600 aio_context_release(aio_context
);
1603 static void internal_snapshot_clean(BlkActionState
*common
)
1605 InternalSnapshotState
*state
= DO_UPCAST(InternalSnapshotState
,
1607 AioContext
*aio_context
;
1613 aio_context
= bdrv_get_aio_context(state
->bs
);
1614 aio_context_acquire(aio_context
);
1616 bdrv_drained_end(state
->bs
);
1618 aio_context_release(aio_context
);
1621 /* external snapshot private data */
1622 typedef struct ExternalSnapshotState
{
1623 BlkActionState common
;
1624 BlockDriverState
*old_bs
;
1625 BlockDriverState
*new_bs
;
1626 bool overlay_appended
;
1627 } ExternalSnapshotState
;
1629 static void external_snapshot_prepare(BlkActionState
*common
,
1633 QDict
*options
= NULL
;
1634 Error
*local_err
= NULL
;
1635 /* Device and node name of the image to generate the snapshot from */
1637 const char *node_name
;
1638 /* Reference to the new image (for 'blockdev-snapshot') */
1639 const char *snapshot_ref
;
1640 /* File name of the new image (for 'blockdev-snapshot-sync') */
1641 const char *new_image_file
;
1642 ExternalSnapshotState
*state
=
1643 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1644 TransactionAction
*action
= common
->action
;
1645 AioContext
*aio_context
;
1647 /* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar
1648 * purpose but a different set of parameters */
1649 switch (action
->type
) {
1650 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT
:
1652 BlockdevSnapshot
*s
= action
->u
.blockdev_snapshot
.data
;
1654 node_name
= s
->node
;
1655 new_image_file
= NULL
;
1656 snapshot_ref
= s
->overlay
;
1659 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
:
1661 BlockdevSnapshotSync
*s
= action
->u
.blockdev_snapshot_sync
.data
;
1662 device
= s
->has_device
? s
->device
: NULL
;
1663 node_name
= s
->has_node_name
? s
->node_name
: NULL
;
1664 new_image_file
= s
->snapshot_file
;
1665 snapshot_ref
= NULL
;
1669 g_assert_not_reached();
1672 /* start processing */
1673 if (action_check_completion_mode(common
, errp
) < 0) {
1677 state
->old_bs
= bdrv_lookup_bs(device
, node_name
, errp
);
1678 if (!state
->old_bs
) {
1682 aio_context
= bdrv_get_aio_context(state
->old_bs
);
1683 aio_context_acquire(aio_context
);
1685 /* Paired with .clean() */
1686 bdrv_drained_begin(state
->old_bs
);
1688 if (!bdrv_is_inserted(state
->old_bs
)) {
1689 error_setg(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
1693 if (bdrv_op_is_blocked(state
->old_bs
,
1694 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT
, errp
)) {
1698 if (!bdrv_is_read_only(state
->old_bs
)) {
1699 if (bdrv_flush(state
->old_bs
)) {
1700 error_setg(errp
, QERR_IO_ERROR
);
1705 if (!bdrv_is_first_non_filter(state
->old_bs
)) {
1706 error_setg(errp
, QERR_FEATURE_DISABLED
, "snapshot");
1710 if (action
->type
== TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
) {
1711 BlockdevSnapshotSync
*s
= action
->u
.blockdev_snapshot_sync
.data
;
1712 const char *format
= s
->has_format
? s
->format
: "qcow2";
1713 enum NewImageMode mode
;
1714 const char *snapshot_node_name
=
1715 s
->has_snapshot_node_name
? s
->snapshot_node_name
: NULL
;
1717 if (node_name
&& !snapshot_node_name
) {
1718 error_setg(errp
, "New snapshot node name missing");
1722 if (snapshot_node_name
&&
1723 bdrv_lookup_bs(snapshot_node_name
, snapshot_node_name
, NULL
)) {
1724 error_setg(errp
, "New snapshot node name already in use");
1728 flags
= state
->old_bs
->open_flags
;
1729 flags
&= ~(BDRV_O_SNAPSHOT
| BDRV_O_COPY_ON_READ
);
1730 flags
|= BDRV_O_NO_BACKING
;
1732 /* create new image w/backing file */
1733 mode
= s
->has_mode
? s
->mode
: NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
1734 if (mode
!= NEW_IMAGE_MODE_EXISTING
) {
1735 int64_t size
= bdrv_getlength(state
->old_bs
);
1737 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
1740 bdrv_img_create(new_image_file
, format
,
1741 state
->old_bs
->filename
,
1742 state
->old_bs
->drv
->format_name
,
1743 NULL
, size
, flags
, false, &local_err
);
1745 error_propagate(errp
, local_err
);
1750 options
= qdict_new();
1751 if (s
->has_snapshot_node_name
) {
1752 qdict_put_str(options
, "node-name", snapshot_node_name
);
1754 qdict_put_str(options
, "driver", format
);
1757 state
->new_bs
= bdrv_open(new_image_file
, snapshot_ref
, options
, flags
,
1759 /* We will manually add the backing_hd field to the bs later */
1760 if (!state
->new_bs
) {
1764 if (bdrv_has_blk(state
->new_bs
)) {
1765 error_setg(errp
, "The snapshot is already in use");
1769 if (bdrv_op_is_blocked(state
->new_bs
, BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT
,
1774 if (state
->new_bs
->backing
!= NULL
) {
1775 error_setg(errp
, "The snapshot already has a backing image");
1779 if (!state
->new_bs
->drv
->supports_backing
) {
1780 error_setg(errp
, "The snapshot does not support backing images");
1784 bdrv_set_aio_context(state
->new_bs
, aio_context
);
1786 /* This removes our old bs and adds the new bs. This is an operation that
1787 * can fail, so we need to do it in .prepare; undoing it for abort is
1788 * always possible. */
1789 bdrv_ref(state
->new_bs
);
1790 bdrv_append(state
->new_bs
, state
->old_bs
, &local_err
);
1792 error_propagate(errp
, local_err
);
1795 state
->overlay_appended
= true;
1798 aio_context_release(aio_context
);
1801 static void external_snapshot_commit(BlkActionState
*common
)
1803 ExternalSnapshotState
*state
=
1804 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1805 AioContext
*aio_context
;
1807 aio_context
= bdrv_get_aio_context(state
->old_bs
);
1808 aio_context_acquire(aio_context
);
1810 /* We don't need (or want) to use the transactional
1811 * bdrv_reopen_multiple() across all the entries at once, because we
1812 * don't want to abort all of them if one of them fails the reopen */
1813 if (!atomic_read(&state
->old_bs
->copy_on_read
)) {
1814 bdrv_reopen(state
->old_bs
, state
->old_bs
->open_flags
& ~BDRV_O_RDWR
,
1818 aio_context_release(aio_context
);
1821 static void external_snapshot_abort(BlkActionState
*common
)
1823 ExternalSnapshotState
*state
=
1824 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1825 if (state
->new_bs
) {
1826 if (state
->overlay_appended
) {
1827 AioContext
*aio_context
;
1829 aio_context
= bdrv_get_aio_context(state
->old_bs
);
1830 aio_context_acquire(aio_context
);
1832 bdrv_ref(state
->old_bs
); /* we can't let bdrv_set_backind_hd()
1833 close state->old_bs; we need it */
1834 bdrv_set_backing_hd(state
->new_bs
, NULL
, &error_abort
);
1835 bdrv_replace_node(state
->new_bs
, state
->old_bs
, &error_abort
);
1836 bdrv_unref(state
->old_bs
); /* bdrv_replace_node() ref'ed old_bs */
1838 aio_context_release(aio_context
);
1843 static void external_snapshot_clean(BlkActionState
*common
)
1845 ExternalSnapshotState
*state
=
1846 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1847 AioContext
*aio_context
;
1849 if (!state
->old_bs
) {
1853 aio_context
= bdrv_get_aio_context(state
->old_bs
);
1854 aio_context_acquire(aio_context
);
1856 bdrv_drained_end(state
->old_bs
);
1857 bdrv_unref(state
->new_bs
);
1859 aio_context_release(aio_context
);
1862 typedef struct DriveBackupState
{
1863 BlkActionState common
;
1864 BlockDriverState
*bs
;
1868 static BlockJob
*do_drive_backup(DriveBackup
*backup
, JobTxn
*txn
,
1871 static void drive_backup_prepare(BlkActionState
*common
, Error
**errp
)
1873 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1874 BlockDriverState
*bs
;
1875 DriveBackup
*backup
;
1876 AioContext
*aio_context
;
1877 Error
*local_err
= NULL
;
1879 assert(common
->action
->type
== TRANSACTION_ACTION_KIND_DRIVE_BACKUP
);
1880 backup
= common
->action
->u
.drive_backup
.data
;
1882 bs
= qmp_get_root_bs(backup
->device
, errp
);
1887 aio_context
= bdrv_get_aio_context(bs
);
1888 aio_context_acquire(aio_context
);
1890 /* Paired with .clean() */
1891 bdrv_drained_begin(bs
);
1895 state
->job
= do_drive_backup(backup
, common
->block_job_txn
, &local_err
);
1897 error_propagate(errp
, local_err
);
1902 aio_context_release(aio_context
);
1905 static void drive_backup_commit(BlkActionState
*common
)
1907 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, 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 drive_backup_abort(BlkActionState
*common
)
1921 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, 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 drive_backup_clean(BlkActionState
*common
)
1937 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, 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 BlockdevBackupState
{
1953 BlkActionState common
;
1954 BlockDriverState
*bs
;
1956 } BlockdevBackupState
;
1958 static BlockJob
*do_blockdev_backup(BlockdevBackup
*backup
, JobTxn
*txn
,
1961 static void blockdev_backup_prepare(BlkActionState
*common
, Error
**errp
)
1963 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
1964 BlockdevBackup
*backup
;
1965 BlockDriverState
*bs
, *target
;
1966 AioContext
*aio_context
;
1967 Error
*local_err
= NULL
;
1969 assert(common
->action
->type
== TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP
);
1970 backup
= common
->action
->u
.blockdev_backup
.data
;
1972 bs
= bdrv_lookup_bs(backup
->device
, backup
->device
, errp
);
1977 target
= bdrv_lookup_bs(backup
->target
, backup
->target
, errp
);
1982 aio_context
= bdrv_get_aio_context(bs
);
1983 if (aio_context
!= bdrv_get_aio_context(target
)) {
1984 error_setg(errp
, "Backup between two IO threads is not implemented");
1987 aio_context_acquire(aio_context
);
1990 /* Paired with .clean() */
1991 bdrv_drained_begin(state
->bs
);
1993 state
->job
= do_blockdev_backup(backup
, common
->block_job_txn
, &local_err
);
1995 error_propagate(errp
, local_err
);
2000 aio_context_release(aio_context
);
2003 static void blockdev_backup_commit(BlkActionState
*common
)
2005 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
2006 AioContext
*aio_context
;
2008 aio_context
= bdrv_get_aio_context(state
->bs
);
2009 aio_context_acquire(aio_context
);
2012 job_start(&state
->job
->job
);
2014 aio_context_release(aio_context
);
2017 static void blockdev_backup_abort(BlkActionState
*common
)
2019 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
2022 AioContext
*aio_context
;
2024 aio_context
= bdrv_get_aio_context(state
->bs
);
2025 aio_context_acquire(aio_context
);
2027 job_cancel_sync(&state
->job
->job
);
2029 aio_context_release(aio_context
);
2033 static void blockdev_backup_clean(BlkActionState
*common
)
2035 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
2036 AioContext
*aio_context
;
2042 aio_context
= bdrv_get_aio_context(state
->bs
);
2043 aio_context_acquire(aio_context
);
2045 bdrv_drained_end(state
->bs
);
2047 aio_context_release(aio_context
);
2050 typedef struct BlockDirtyBitmapState
{
2051 BlkActionState common
;
2052 BdrvDirtyBitmap
*bitmap
;
2053 BlockDriverState
*bs
;
2057 } BlockDirtyBitmapState
;
2059 static void block_dirty_bitmap_add_prepare(BlkActionState
*common
,
2062 Error
*local_err
= NULL
;
2063 BlockDirtyBitmapAdd
*action
;
2064 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2067 if (action_check_completion_mode(common
, errp
) < 0) {
2071 action
= common
->action
->u
.block_dirty_bitmap_add
.data
;
2072 /* AIO context taken and released within qmp_block_dirty_bitmap_add */
2073 qmp_block_dirty_bitmap_add(action
->node
, action
->name
,
2074 action
->has_granularity
, action
->granularity
,
2075 action
->has_persistent
, action
->persistent
,
2076 action
->has_autoload
, action
->autoload
,
2077 action
->has_x_disabled
, action
->x_disabled
,
2081 state
->prepared
= true;
2083 error_propagate(errp
, local_err
);
2087 static void block_dirty_bitmap_add_abort(BlkActionState
*common
)
2089 BlockDirtyBitmapAdd
*action
;
2090 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2093 action
= common
->action
->u
.block_dirty_bitmap_add
.data
;
2094 /* Should not be able to fail: IF the bitmap was added via .prepare(),
2095 * then the node reference and bitmap name must have been valid.
2097 if (state
->prepared
) {
2098 qmp_block_dirty_bitmap_remove(action
->node
, action
->name
, &error_abort
);
2102 static void block_dirty_bitmap_clear_prepare(BlkActionState
*common
,
2105 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2107 BlockDirtyBitmap
*action
;
2109 if (action_check_completion_mode(common
, errp
) < 0) {
2113 action
= common
->action
->u
.block_dirty_bitmap_clear
.data
;
2114 state
->bitmap
= block_dirty_bitmap_lookup(action
->node
,
2118 if (!state
->bitmap
) {
2122 if (bdrv_dirty_bitmap_frozen(state
->bitmap
)) {
2123 error_setg(errp
, "Cannot modify a frozen bitmap");
2125 } else if (bdrv_dirty_bitmap_qmp_locked(state
->bitmap
)) {
2126 error_setg(errp
, "Cannot modify a locked bitmap");
2128 } else if (!bdrv_dirty_bitmap_enabled(state
->bitmap
)) {
2129 error_setg(errp
, "Cannot clear a disabled bitmap");
2131 } else if (bdrv_dirty_bitmap_readonly(state
->bitmap
)) {
2132 error_setg(errp
, "Cannot clear a readonly bitmap");
2136 bdrv_clear_dirty_bitmap(state
->bitmap
, &state
->backup
);
2139 static void block_dirty_bitmap_clear_abort(BlkActionState
*common
)
2141 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2144 if (state
->backup
) {
2145 bdrv_undo_clear_dirty_bitmap(state
->bitmap
, state
->backup
);
2149 static void block_dirty_bitmap_clear_commit(BlkActionState
*common
)
2151 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2154 hbitmap_free(state
->backup
);
2157 static void block_dirty_bitmap_enable_prepare(BlkActionState
*common
,
2160 BlockDirtyBitmap
*action
;
2161 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2164 if (action_check_completion_mode(common
, errp
) < 0) {
2168 action
= common
->action
->u
.x_block_dirty_bitmap_enable
.data
;
2169 state
->bitmap
= block_dirty_bitmap_lookup(action
->node
,
2173 if (!state
->bitmap
) {
2177 state
->was_enabled
= bdrv_dirty_bitmap_enabled(state
->bitmap
);
2178 bdrv_enable_dirty_bitmap(state
->bitmap
);
2181 static void block_dirty_bitmap_enable_abort(BlkActionState
*common
)
2183 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2186 if (!state
->was_enabled
) {
2187 bdrv_disable_dirty_bitmap(state
->bitmap
);
2191 static void block_dirty_bitmap_disable_prepare(BlkActionState
*common
,
2194 BlockDirtyBitmap
*action
;
2195 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2198 if (action_check_completion_mode(common
, errp
) < 0) {
2202 action
= common
->action
->u
.x_block_dirty_bitmap_disable
.data
;
2203 state
->bitmap
= block_dirty_bitmap_lookup(action
->node
,
2207 if (!state
->bitmap
) {
2211 state
->was_enabled
= bdrv_dirty_bitmap_enabled(state
->bitmap
);
2212 bdrv_disable_dirty_bitmap(state
->bitmap
);
2215 static void block_dirty_bitmap_disable_abort(BlkActionState
*common
)
2217 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2220 if (state
->was_enabled
) {
2221 bdrv_enable_dirty_bitmap(state
->bitmap
);
2225 static void abort_prepare(BlkActionState
*common
, Error
**errp
)
2227 error_setg(errp
, "Transaction aborted using Abort action");
2230 static void abort_commit(BlkActionState
*common
)
2232 g_assert_not_reached(); /* this action never succeeds */
2235 static const BlkActionOps actions
[] = {
2236 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT
] = {
2237 .instance_size
= sizeof(ExternalSnapshotState
),
2238 .prepare
= external_snapshot_prepare
,
2239 .commit
= external_snapshot_commit
,
2240 .abort
= external_snapshot_abort
,
2241 .clean
= external_snapshot_clean
,
2243 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
] = {
2244 .instance_size
= sizeof(ExternalSnapshotState
),
2245 .prepare
= external_snapshot_prepare
,
2246 .commit
= external_snapshot_commit
,
2247 .abort
= external_snapshot_abort
,
2248 .clean
= external_snapshot_clean
,
2250 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP
] = {
2251 .instance_size
= sizeof(DriveBackupState
),
2252 .prepare
= drive_backup_prepare
,
2253 .commit
= drive_backup_commit
,
2254 .abort
= drive_backup_abort
,
2255 .clean
= drive_backup_clean
,
2257 [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP
] = {
2258 .instance_size
= sizeof(BlockdevBackupState
),
2259 .prepare
= blockdev_backup_prepare
,
2260 .commit
= blockdev_backup_commit
,
2261 .abort
= blockdev_backup_abort
,
2262 .clean
= blockdev_backup_clean
,
2264 [TRANSACTION_ACTION_KIND_ABORT
] = {
2265 .instance_size
= sizeof(BlkActionState
),
2266 .prepare
= abort_prepare
,
2267 .commit
= abort_commit
,
2269 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
] = {
2270 .instance_size
= sizeof(InternalSnapshotState
),
2271 .prepare
= internal_snapshot_prepare
,
2272 .abort
= internal_snapshot_abort
,
2273 .clean
= internal_snapshot_clean
,
2275 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD
] = {
2276 .instance_size
= sizeof(BlockDirtyBitmapState
),
2277 .prepare
= block_dirty_bitmap_add_prepare
,
2278 .abort
= block_dirty_bitmap_add_abort
,
2280 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR
] = {
2281 .instance_size
= sizeof(BlockDirtyBitmapState
),
2282 .prepare
= block_dirty_bitmap_clear_prepare
,
2283 .commit
= block_dirty_bitmap_clear_commit
,
2284 .abort
= block_dirty_bitmap_clear_abort
,
2286 [TRANSACTION_ACTION_KIND_X_BLOCK_DIRTY_BITMAP_ENABLE
] = {
2287 .instance_size
= sizeof(BlockDirtyBitmapState
),
2288 .prepare
= block_dirty_bitmap_enable_prepare
,
2289 .abort
= block_dirty_bitmap_enable_abort
,
2291 [TRANSACTION_ACTION_KIND_X_BLOCK_DIRTY_BITMAP_DISABLE
] = {
2292 .instance_size
= sizeof(BlockDirtyBitmapState
),
2293 .prepare
= block_dirty_bitmap_disable_prepare
,
2294 .abort
= block_dirty_bitmap_disable_abort
,
2299 * Allocate a TransactionProperties structure if necessary, and fill
2300 * that structure with desired defaults if they are unset.
2302 static TransactionProperties
*get_transaction_properties(
2303 TransactionProperties
*props
)
2306 props
= g_new0(TransactionProperties
, 1);
2309 if (!props
->has_completion_mode
) {
2310 props
->has_completion_mode
= true;
2311 props
->completion_mode
= ACTION_COMPLETION_MODE_INDIVIDUAL
;
2318 * 'Atomic' group operations. The operations are performed as a set, and if
2319 * any fail then we roll back all operations in the group.
2321 void qmp_transaction(TransactionActionList
*dev_list
,
2323 struct TransactionProperties
*props
,
2326 TransactionActionList
*dev_entry
= dev_list
;
2327 JobTxn
*block_job_txn
= NULL
;
2328 BlkActionState
*state
, *next
;
2329 Error
*local_err
= NULL
;
2331 QSIMPLEQ_HEAD(snap_bdrv_states
, BlkActionState
) snap_bdrv_states
;
2332 QSIMPLEQ_INIT(&snap_bdrv_states
);
2334 /* Does this transaction get canceled as a group on failure?
2335 * If not, we don't really need to make a JobTxn.
2337 props
= get_transaction_properties(props
);
2338 if (props
->completion_mode
!= ACTION_COMPLETION_MODE_INDIVIDUAL
) {
2339 block_job_txn
= job_txn_new();
2342 /* drain all i/o before any operations */
2345 /* We don't do anything in this loop that commits us to the operations */
2346 while (NULL
!= dev_entry
) {
2347 TransactionAction
*dev_info
= NULL
;
2348 const BlkActionOps
*ops
;
2350 dev_info
= dev_entry
->value
;
2351 dev_entry
= dev_entry
->next
;
2353 assert(dev_info
->type
< ARRAY_SIZE(actions
));
2355 ops
= &actions
[dev_info
->type
];
2356 assert(ops
->instance_size
> 0);
2358 state
= g_malloc0(ops
->instance_size
);
2360 state
->action
= dev_info
;
2361 state
->block_job_txn
= block_job_txn
;
2362 state
->txn_props
= props
;
2363 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states
, state
, entry
);
2365 state
->ops
->prepare(state
, &local_err
);
2367 error_propagate(errp
, local_err
);
2368 goto delete_and_fail
;
2372 QSIMPLEQ_FOREACH(state
, &snap_bdrv_states
, entry
) {
2373 if (state
->ops
->commit
) {
2374 state
->ops
->commit(state
);
2382 /* failure, and it is all-or-none; roll back all operations */
2383 QSIMPLEQ_FOREACH(state
, &snap_bdrv_states
, entry
) {
2384 if (state
->ops
->abort
) {
2385 state
->ops
->abort(state
);
2389 QSIMPLEQ_FOREACH_SAFE(state
, &snap_bdrv_states
, entry
, next
) {
2390 if (state
->ops
->clean
) {
2391 state
->ops
->clean(state
);
2396 qapi_free_TransactionProperties(props
);
2398 job_txn_unref(block_job_txn
);
2401 void qmp_eject(bool has_device
, const char *device
,
2402 bool has_id
, const char *id
,
2403 bool has_force
, bool force
, Error
**errp
)
2405 Error
*local_err
= NULL
;
2412 rc
= do_open_tray(has_device
? device
: NULL
,
2415 if (rc
&& rc
!= -ENOSYS
) {
2416 error_propagate(errp
, local_err
);
2419 error_free(local_err
);
2421 blockdev_remove_medium(has_device
, device
, has_id
, id
, errp
);
2424 void qmp_block_passwd(bool has_device
, const char *device
,
2425 bool has_node_name
, const char *node_name
,
2426 const char *password
, Error
**errp
)
2429 "Setting block passwords directly is no longer supported");
2433 * Attempt to open the tray of @device.
2434 * If @force, ignore its tray lock.
2435 * Else, if the tray is locked, don't open it, but ask the guest to open it.
2436 * On error, store an error through @errp and return -errno.
2437 * If @device does not exist, return -ENODEV.
2438 * If it has no removable media, return -ENOTSUP.
2439 * If it has no tray, return -ENOSYS.
2440 * If the guest was asked to open the tray, return -EINPROGRESS.
2443 static int do_open_tray(const char *blk_name
, const char *qdev_id
,
2444 bool force
, Error
**errp
)
2447 const char *device
= qdev_id
?: blk_name
;
2450 blk
= qmp_get_blk(blk_name
, qdev_id
, errp
);
2455 if (!blk_dev_has_removable_media(blk
)) {
2456 error_setg(errp
, "Device '%s' is not removable", device
);
2460 if (!blk_dev_has_tray(blk
)) {
2461 error_setg(errp
, "Device '%s' does not have a tray", device
);
2465 if (blk_dev_is_tray_open(blk
)) {
2469 locked
= blk_dev_is_medium_locked(blk
);
2471 blk_dev_eject_request(blk
, force
);
2474 if (!locked
|| force
) {
2475 blk_dev_change_media_cb(blk
, false, &error_abort
);
2478 if (locked
&& !force
) {
2479 error_setg(errp
, "Device '%s' is locked and force was not specified, "
2480 "wait for tray to open and try again", device
);
2481 return -EINPROGRESS
;
2487 void qmp_blockdev_open_tray(bool has_device
, const char *device
,
2488 bool has_id
, const char *id
,
2489 bool has_force
, bool force
,
2492 Error
*local_err
= NULL
;
2498 rc
= do_open_tray(has_device
? device
: NULL
,
2501 if (rc
&& rc
!= -ENOSYS
&& rc
!= -EINPROGRESS
) {
2502 error_propagate(errp
, local_err
);
2505 error_free(local_err
);
2508 void qmp_blockdev_close_tray(bool has_device
, const char *device
,
2509 bool has_id
, const char *id
,
2513 Error
*local_err
= NULL
;
2515 device
= has_device
? device
: NULL
;
2516 id
= has_id
? id
: NULL
;
2518 blk
= qmp_get_blk(device
, id
, errp
);
2523 if (!blk_dev_has_removable_media(blk
)) {
2524 error_setg(errp
, "Device '%s' is not removable", device
?: id
);
2528 if (!blk_dev_has_tray(blk
)) {
2529 /* Ignore this command on tray-less devices */
2533 if (!blk_dev_is_tray_open(blk
)) {
2537 blk_dev_change_media_cb(blk
, true, &local_err
);
2539 error_propagate(errp
, local_err
);
2544 static void blockdev_remove_medium(bool has_device
, const char *device
,
2545 bool has_id
, const char *id
, Error
**errp
)
2548 BlockDriverState
*bs
;
2549 AioContext
*aio_context
;
2550 bool has_attached_device
;
2552 device
= has_device
? device
: NULL
;
2553 id
= has_id
? id
: NULL
;
2555 blk
= qmp_get_blk(device
, id
, errp
);
2560 /* For BBs without a device, we can exchange the BDS tree at will */
2561 has_attached_device
= blk_get_attached_dev(blk
);
2563 if (has_attached_device
&& !blk_dev_has_removable_media(blk
)) {
2564 error_setg(errp
, "Device '%s' is not removable", device
?: id
);
2568 if (has_attached_device
&& blk_dev_has_tray(blk
) &&
2569 !blk_dev_is_tray_open(blk
))
2571 error_setg(errp
, "Tray of device '%s' is not open", device
?: id
);
2580 aio_context
= bdrv_get_aio_context(bs
);
2581 aio_context_acquire(aio_context
);
2583 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_EJECT
, errp
)) {
2589 if (!blk_dev_has_tray(blk
)) {
2590 /* For tray-less devices, blockdev-open-tray is a no-op (or may not be
2591 * called at all); therefore, the medium needs to be ejected here.
2592 * Do it after blk_remove_bs() so blk_is_inserted(blk) returns the @load
2593 * value passed here (i.e. false). */
2594 blk_dev_change_media_cb(blk
, false, &error_abort
);
2598 aio_context_release(aio_context
);
2601 void qmp_blockdev_remove_medium(const char *id
, Error
**errp
)
2603 blockdev_remove_medium(false, NULL
, true, id
, errp
);
2606 static void qmp_blockdev_insert_anon_medium(BlockBackend
*blk
,
2607 BlockDriverState
*bs
, Error
**errp
)
2609 Error
*local_err
= NULL
;
2613 /* For BBs without a device, we can exchange the BDS tree at will */
2614 has_device
= blk_get_attached_dev(blk
);
2616 if (has_device
&& !blk_dev_has_removable_media(blk
)) {
2617 error_setg(errp
, "Device is not removable");
2621 if (has_device
&& blk_dev_has_tray(blk
) && !blk_dev_is_tray_open(blk
)) {
2622 error_setg(errp
, "Tray of the device is not open");
2627 error_setg(errp
, "There already is a medium in the device");
2631 ret
= blk_insert_bs(blk
, bs
, errp
);
2636 if (!blk_dev_has_tray(blk
)) {
2637 /* For tray-less devices, blockdev-close-tray is a no-op (or may not be
2638 * called at all); therefore, the medium needs to be pushed into the
2640 * Do it after blk_insert_bs() so blk_is_inserted(blk) returns the @load
2641 * value passed here (i.e. true). */
2642 blk_dev_change_media_cb(blk
, true, &local_err
);
2644 error_propagate(errp
, local_err
);
2651 static void blockdev_insert_medium(bool has_device
, const char *device
,
2652 bool has_id
, const char *id
,
2653 const char *node_name
, Error
**errp
)
2656 BlockDriverState
*bs
;
2658 blk
= qmp_get_blk(has_device
? device
: NULL
,
2665 bs
= bdrv_find_node(node_name
);
2667 error_setg(errp
, "Node '%s' not found", node_name
);
2671 if (bdrv_has_blk(bs
)) {
2672 error_setg(errp
, "Node '%s' is already in use", node_name
);
2676 qmp_blockdev_insert_anon_medium(blk
, bs
, errp
);
2679 void qmp_blockdev_insert_medium(const char *id
, const char *node_name
,
2682 blockdev_insert_medium(false, NULL
, true, id
, node_name
, errp
);
2685 void qmp_blockdev_change_medium(bool has_device
, const char *device
,
2686 bool has_id
, const char *id
,
2687 const char *filename
,
2688 bool has_format
, const char *format
,
2690 BlockdevChangeReadOnlyMode read_only
,
2694 BlockDriverState
*medium_bs
= NULL
;
2698 QDict
*options
= NULL
;
2701 blk
= qmp_get_blk(has_device
? device
: NULL
,
2709 blk_update_root_state(blk
);
2712 bdrv_flags
= blk_get_open_flags_from_root_state(blk
);
2713 bdrv_flags
&= ~(BDRV_O_TEMPORARY
| BDRV_O_SNAPSHOT
| BDRV_O_NO_BACKING
|
2716 if (!has_read_only
) {
2717 read_only
= BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN
;
2720 switch (read_only
) {
2721 case BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN
:
2724 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_ONLY
:
2725 bdrv_flags
&= ~BDRV_O_RDWR
;
2728 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_WRITE
:
2729 bdrv_flags
|= BDRV_O_RDWR
;
2736 options
= qdict_new();
2737 detect_zeroes
= blk_get_detect_zeroes_from_root_state(blk
);
2738 qdict_put_str(options
, "detect-zeroes", detect_zeroes
? "on" : "off");
2741 qdict_put_str(options
, "driver", format
);
2744 medium_bs
= bdrv_open(filename
, NULL
, options
, bdrv_flags
, errp
);
2749 rc
= do_open_tray(has_device
? device
: NULL
,
2752 if (rc
&& rc
!= -ENOSYS
) {
2753 error_propagate(errp
, err
);
2759 blockdev_remove_medium(has_device
, device
, has_id
, id
, &err
);
2761 error_propagate(errp
, err
);
2765 qmp_blockdev_insert_anon_medium(blk
, medium_bs
, &err
);
2767 error_propagate(errp
, err
);
2771 qmp_blockdev_close_tray(has_device
, device
, has_id
, id
, errp
);
2774 /* If the medium has been inserted, the device has its own reference, so
2775 * ours must be relinquished; and if it has not been inserted successfully,
2776 * the reference must be relinquished anyway */
2777 bdrv_unref(medium_bs
);
2780 /* throttling disk I/O limits */
2781 void qmp_block_set_io_throttle(BlockIOThrottle
*arg
, Error
**errp
)
2784 BlockDriverState
*bs
;
2786 AioContext
*aio_context
;
2788 blk
= qmp_get_blk(arg
->has_device
? arg
->device
: NULL
,
2789 arg
->has_id
? arg
->id
: NULL
,
2795 aio_context
= blk_get_aio_context(blk
);
2796 aio_context_acquire(aio_context
);
2800 error_setg(errp
, "Device has no medium");
2804 throttle_config_init(&cfg
);
2805 cfg
.buckets
[THROTTLE_BPS_TOTAL
].avg
= arg
->bps
;
2806 cfg
.buckets
[THROTTLE_BPS_READ
].avg
= arg
->bps_rd
;
2807 cfg
.buckets
[THROTTLE_BPS_WRITE
].avg
= arg
->bps_wr
;
2809 cfg
.buckets
[THROTTLE_OPS_TOTAL
].avg
= arg
->iops
;
2810 cfg
.buckets
[THROTTLE_OPS_READ
].avg
= arg
->iops_rd
;
2811 cfg
.buckets
[THROTTLE_OPS_WRITE
].avg
= arg
->iops_wr
;
2813 if (arg
->has_bps_max
) {
2814 cfg
.buckets
[THROTTLE_BPS_TOTAL
].max
= arg
->bps_max
;
2816 if (arg
->has_bps_rd_max
) {
2817 cfg
.buckets
[THROTTLE_BPS_READ
].max
= arg
->bps_rd_max
;
2819 if (arg
->has_bps_wr_max
) {
2820 cfg
.buckets
[THROTTLE_BPS_WRITE
].max
= arg
->bps_wr_max
;
2822 if (arg
->has_iops_max
) {
2823 cfg
.buckets
[THROTTLE_OPS_TOTAL
].max
= arg
->iops_max
;
2825 if (arg
->has_iops_rd_max
) {
2826 cfg
.buckets
[THROTTLE_OPS_READ
].max
= arg
->iops_rd_max
;
2828 if (arg
->has_iops_wr_max
) {
2829 cfg
.buckets
[THROTTLE_OPS_WRITE
].max
= arg
->iops_wr_max
;
2832 if (arg
->has_bps_max_length
) {
2833 cfg
.buckets
[THROTTLE_BPS_TOTAL
].burst_length
= arg
->bps_max_length
;
2835 if (arg
->has_bps_rd_max_length
) {
2836 cfg
.buckets
[THROTTLE_BPS_READ
].burst_length
= arg
->bps_rd_max_length
;
2838 if (arg
->has_bps_wr_max_length
) {
2839 cfg
.buckets
[THROTTLE_BPS_WRITE
].burst_length
= arg
->bps_wr_max_length
;
2841 if (arg
->has_iops_max_length
) {
2842 cfg
.buckets
[THROTTLE_OPS_TOTAL
].burst_length
= arg
->iops_max_length
;
2844 if (arg
->has_iops_rd_max_length
) {
2845 cfg
.buckets
[THROTTLE_OPS_READ
].burst_length
= arg
->iops_rd_max_length
;
2847 if (arg
->has_iops_wr_max_length
) {
2848 cfg
.buckets
[THROTTLE_OPS_WRITE
].burst_length
= arg
->iops_wr_max_length
;
2851 if (arg
->has_iops_size
) {
2852 cfg
.op_size
= arg
->iops_size
;
2855 if (!throttle_is_valid(&cfg
, errp
)) {
2859 if (throttle_enabled(&cfg
)) {
2860 /* Enable I/O limits if they're not enabled yet, otherwise
2861 * just update the throttling group. */
2862 if (!blk_get_public(blk
)->throttle_group_member
.throttle_state
) {
2863 blk_io_limits_enable(blk
,
2864 arg
->has_group
? arg
->group
:
2865 arg
->has_device
? arg
->device
:
2867 } else if (arg
->has_group
) {
2868 blk_io_limits_update_group(blk
, arg
->group
);
2870 /* Set the new throttling configuration */
2871 blk_set_io_limits(blk
, &cfg
);
2872 } else if (blk_get_public(blk
)->throttle_group_member
.throttle_state
) {
2873 /* If all throttling settings are set to 0, disable I/O limits */
2874 blk_io_limits_disable(blk
);
2878 aio_context_release(aio_context
);
2881 void qmp_block_dirty_bitmap_add(const char *node
, const char *name
,
2882 bool has_granularity
, uint32_t granularity
,
2883 bool has_persistent
, bool persistent
,
2884 bool has_autoload
, bool autoload
,
2885 bool has_disabled
, bool disabled
,
2888 BlockDriverState
*bs
;
2889 BdrvDirtyBitmap
*bitmap
;
2891 if (!name
|| name
[0] == '\0') {
2892 error_setg(errp
, "Bitmap name cannot be empty");
2896 bs
= bdrv_lookup_bs(node
, node
, errp
);
2901 if (has_granularity
) {
2902 if (granularity
< 512 || !is_power_of_2(granularity
)) {
2903 error_setg(errp
, "Granularity must be power of 2 "
2904 "and at least 512");
2908 /* Default to cluster size, if available: */
2909 granularity
= bdrv_get_default_bitmap_granularity(bs
);
2912 if (!has_persistent
) {
2917 warn_report("Autoload option is deprecated and its value is ignored");
2920 if (!has_disabled
) {
2925 !bdrv_can_store_new_dirty_bitmap(bs
, name
, granularity
, errp
))
2930 bitmap
= bdrv_create_dirty_bitmap(bs
, granularity
, name
, errp
);
2931 if (bitmap
== NULL
) {
2936 bdrv_disable_dirty_bitmap(bitmap
);
2939 bdrv_dirty_bitmap_set_persistance(bitmap
, persistent
);
2942 void qmp_block_dirty_bitmap_remove(const char *node
, const char *name
,
2945 BlockDriverState
*bs
;
2946 BdrvDirtyBitmap
*bitmap
;
2947 Error
*local_err
= NULL
;
2949 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
2950 if (!bitmap
|| !bs
) {
2954 if (bdrv_dirty_bitmap_frozen(bitmap
)) {
2956 "Bitmap '%s' is currently frozen and cannot be removed",
2959 } else if (bdrv_dirty_bitmap_qmp_locked(bitmap
)) {
2961 "Bitmap '%s' is currently locked and cannot be removed",
2966 if (bdrv_dirty_bitmap_get_persistance(bitmap
)) {
2967 bdrv_remove_persistent_dirty_bitmap(bs
, name
, &local_err
);
2968 if (local_err
!= NULL
) {
2969 error_propagate(errp
, local_err
);
2974 bdrv_release_dirty_bitmap(bs
, bitmap
);
2978 * Completely clear a bitmap, for the purposes of synchronizing a bitmap
2979 * immediately after a full backup operation.
2981 void qmp_block_dirty_bitmap_clear(const char *node
, const char *name
,
2984 BdrvDirtyBitmap
*bitmap
;
2985 BlockDriverState
*bs
;
2987 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
2988 if (!bitmap
|| !bs
) {
2992 if (bdrv_dirty_bitmap_frozen(bitmap
)) {
2994 "Bitmap '%s' is currently frozen and cannot be modified",
2997 } else if (bdrv_dirty_bitmap_qmp_locked(bitmap
)) {
2999 "Bitmap '%s' is currently locked and cannot be modified",
3002 } else if (!bdrv_dirty_bitmap_enabled(bitmap
)) {
3004 "Bitmap '%s' is currently disabled and cannot be cleared",
3007 } else if (bdrv_dirty_bitmap_readonly(bitmap
)) {
3008 error_setg(errp
, "Bitmap '%s' is readonly and cannot be cleared", name
);
3012 bdrv_clear_dirty_bitmap(bitmap
, NULL
);
3015 void qmp_x_block_dirty_bitmap_enable(const char *node
, const char *name
,
3018 BlockDriverState
*bs
;
3019 BdrvDirtyBitmap
*bitmap
;
3021 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
3026 if (bdrv_dirty_bitmap_frozen(bitmap
)) {
3028 "Bitmap '%s' is currently frozen and cannot be enabled",
3033 bdrv_enable_dirty_bitmap(bitmap
);
3036 void qmp_x_block_dirty_bitmap_disable(const char *node
, const char *name
,
3039 BlockDriverState
*bs
;
3040 BdrvDirtyBitmap
*bitmap
;
3042 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
3047 if (bdrv_dirty_bitmap_frozen(bitmap
)) {
3049 "Bitmap '%s' is currently frozen and cannot be disabled",
3054 bdrv_disable_dirty_bitmap(bitmap
);
3057 void qmp_x_block_dirty_bitmap_merge(const char *node
, const char *dst_name
,
3058 const char *src_name
, Error
**errp
)
3060 BlockDriverState
*bs
;
3061 BdrvDirtyBitmap
*dst
, *src
;
3063 dst
= block_dirty_bitmap_lookup(node
, dst_name
, &bs
, errp
);
3068 if (bdrv_dirty_bitmap_frozen(dst
)) {
3069 error_setg(errp
, "Bitmap '%s' is frozen and cannot be modified",
3072 } else if (bdrv_dirty_bitmap_readonly(dst
)) {
3073 error_setg(errp
, "Bitmap '%s' is readonly and cannot be modified",
3078 src
= bdrv_find_dirty_bitmap(bs
, src_name
);
3080 error_setg(errp
, "Dirty bitmap '%s' not found", src_name
);
3084 bdrv_merge_dirty_bitmap(dst
, src
, errp
);
3087 BlockDirtyBitmapSha256
*qmp_x_debug_block_dirty_bitmap_sha256(const char *node
,
3091 BdrvDirtyBitmap
*bitmap
;
3092 BlockDriverState
*bs
;
3093 BlockDirtyBitmapSha256
*ret
= NULL
;
3096 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
3097 if (!bitmap
|| !bs
) {
3101 sha256
= bdrv_dirty_bitmap_sha256(bitmap
, errp
);
3102 if (sha256
== NULL
) {
3106 ret
= g_new(BlockDirtyBitmapSha256
, 1);
3107 ret
->sha256
= sha256
;
3112 void hmp_drive_del(Monitor
*mon
, const QDict
*qdict
)
3114 const char *id
= qdict_get_str(qdict
, "id");
3116 BlockDriverState
*bs
;
3117 AioContext
*aio_context
;
3118 Error
*local_err
= NULL
;
3120 bs
= bdrv_find_node(id
);
3122 qmp_blockdev_del(id
, &local_err
);
3124 error_report_err(local_err
);
3129 blk
= blk_by_name(id
);
3131 error_report("Device '%s' not found", id
);
3135 if (!blk_legacy_dinfo(blk
)) {
3136 error_report("Deleting device added with blockdev-add"
3137 " is not supported");
3141 aio_context
= blk_get_aio_context(blk
);
3142 aio_context_acquire(aio_context
);
3146 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_DRIVE_DEL
, &local_err
)) {
3147 error_report_err(local_err
);
3148 aio_context_release(aio_context
);
3155 /* Make the BlockBackend and the attached BlockDriverState anonymous */
3156 monitor_remove_blk(blk
);
3158 /* If this BlockBackend has a device attached to it, its refcount will be
3159 * decremented when the device is removed; otherwise we have to do so here.
3161 if (blk_get_attached_dev(blk
)) {
3162 /* Further I/O must not pause the guest */
3163 blk_set_on_error(blk
, BLOCKDEV_ON_ERROR_REPORT
,
3164 BLOCKDEV_ON_ERROR_REPORT
);
3169 aio_context_release(aio_context
);
3172 void qmp_block_resize(bool has_device
, const char *device
,
3173 bool has_node_name
, const char *node_name
,
3174 int64_t size
, Error
**errp
)
3176 Error
*local_err
= NULL
;
3177 BlockBackend
*blk
= NULL
;
3178 BlockDriverState
*bs
;
3179 AioContext
*aio_context
;
3182 bs
= bdrv_lookup_bs(has_device
? device
: NULL
,
3183 has_node_name
? node_name
: NULL
,
3186 error_propagate(errp
, local_err
);
3190 aio_context
= bdrv_get_aio_context(bs
);
3191 aio_context_acquire(aio_context
);
3193 if (!bdrv_is_first_non_filter(bs
)) {
3194 error_setg(errp
, QERR_FEATURE_DISABLED
, "resize");
3199 error_setg(errp
, QERR_INVALID_PARAMETER_VALUE
, "size", "a >0 size");
3203 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_RESIZE
, NULL
)) {
3204 error_setg(errp
, QERR_DEVICE_IN_USE
, device
);
3208 blk
= blk_new(BLK_PERM_RESIZE
, BLK_PERM_ALL
);
3209 ret
= blk_insert_bs(blk
, bs
, errp
);
3214 bdrv_drained_begin(bs
);
3215 ret
= blk_truncate(blk
, size
, PREALLOC_MODE_OFF
, errp
);
3216 bdrv_drained_end(bs
);
3220 aio_context_release(aio_context
);
3223 void qmp_block_stream(bool has_job_id
, const char *job_id
, const char *device
,
3224 bool has_base
, const char *base
,
3225 bool has_base_node
, const char *base_node
,
3226 bool has_backing_file
, const char *backing_file
,
3227 bool has_speed
, int64_t speed
,
3228 bool has_on_error
, BlockdevOnError on_error
,
3231 BlockDriverState
*bs
, *iter
;
3232 BlockDriverState
*base_bs
= NULL
;
3233 AioContext
*aio_context
;
3234 Error
*local_err
= NULL
;
3235 const char *base_name
= NULL
;
3237 if (!has_on_error
) {
3238 on_error
= BLOCKDEV_ON_ERROR_REPORT
;
3241 bs
= bdrv_lookup_bs(device
, device
, errp
);
3246 aio_context
= bdrv_get_aio_context(bs
);
3247 aio_context_acquire(aio_context
);
3249 if (has_base
&& has_base_node
) {
3250 error_setg(errp
, "'base' and 'base-node' cannot be specified "
3251 "at the same time");
3256 base_bs
= bdrv_find_backing_image(bs
, base
);
3257 if (base_bs
== NULL
) {
3258 error_setg(errp
, QERR_BASE_NOT_FOUND
, base
);
3261 assert(bdrv_get_aio_context(base_bs
) == aio_context
);
3265 if (has_base_node
) {
3266 base_bs
= bdrv_lookup_bs(NULL
, base_node
, errp
);
3270 if (bs
== base_bs
|| !bdrv_chain_contains(bs
, base_bs
)) {
3271 error_setg(errp
, "Node '%s' is not a backing image of '%s'",
3275 assert(bdrv_get_aio_context(base_bs
) == aio_context
);
3276 base_name
= base_bs
->filename
;
3279 /* Check for op blockers in the whole chain between bs and base */
3280 for (iter
= bs
; iter
&& iter
!= base_bs
; iter
= backing_bs(iter
)) {
3281 if (bdrv_op_is_blocked(iter
, BLOCK_OP_TYPE_STREAM
, errp
)) {
3286 /* if we are streaming the entire chain, the result will have no backing
3287 * file, and specifying one is therefore an error */
3288 if (base_bs
== NULL
&& has_backing_file
) {
3289 error_setg(errp
, "backing file specified, but streaming the "
3294 /* backing_file string overrides base bs filename */
3295 base_name
= has_backing_file
? backing_file
: base_name
;
3297 stream_start(has_job_id
? job_id
: NULL
, bs
, base_bs
, base_name
,
3298 has_speed
? speed
: 0, on_error
, &local_err
);
3300 error_propagate(errp
, local_err
);
3304 trace_qmp_block_stream(bs
, bs
->job
);
3307 aio_context_release(aio_context
);
3310 void qmp_block_commit(bool has_job_id
, const char *job_id
, const char *device
,
3311 bool has_base
, const char *base
,
3312 bool has_top
, const char *top
,
3313 bool has_backing_file
, const char *backing_file
,
3314 bool has_speed
, int64_t speed
,
3315 bool has_filter_node_name
, const char *filter_node_name
,
3318 BlockDriverState
*bs
;
3319 BlockDriverState
*iter
;
3320 BlockDriverState
*base_bs
, *top_bs
;
3321 AioContext
*aio_context
;
3322 Error
*local_err
= NULL
;
3323 /* This will be part of the QMP command, if/when the
3324 * BlockdevOnError change for blkmirror makes it in
3326 BlockdevOnError on_error
= BLOCKDEV_ON_ERROR_REPORT
;
3331 if (!has_filter_node_name
) {
3332 filter_node_name
= NULL
;
3336 * libvirt relies on the DeviceNotFound error class in order to probe for
3337 * live commit feature versions; for this to work, we must make sure to
3338 * perform the device lookup before any generic errors that may occur in a
3339 * scenario in which all optional arguments are omitted. */
3340 bs
= qmp_get_root_bs(device
, &local_err
);
3342 bs
= bdrv_lookup_bs(device
, device
, NULL
);
3344 error_free(local_err
);
3345 error_set(errp
, ERROR_CLASS_DEVICE_NOT_FOUND
,
3346 "Device '%s' not found", device
);
3348 error_propagate(errp
, local_err
);
3353 aio_context
= bdrv_get_aio_context(bs
);
3354 aio_context_acquire(aio_context
);
3356 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_COMMIT_SOURCE
, errp
)) {
3360 /* default top_bs is the active layer */
3363 if (has_top
&& top
) {
3364 if (strcmp(bs
->filename
, top
) != 0) {
3365 top_bs
= bdrv_find_backing_image(bs
, top
);
3369 if (top_bs
== NULL
) {
3370 error_setg(errp
, "Top image file %s not found", top
? top
: "NULL");
3374 assert(bdrv_get_aio_context(top_bs
) == aio_context
);
3376 if (has_base
&& base
) {
3377 base_bs
= bdrv_find_backing_image(top_bs
, base
);
3379 base_bs
= bdrv_find_base(top_bs
);
3382 if (base_bs
== NULL
) {
3383 error_setg(errp
, QERR_BASE_NOT_FOUND
, base
? base
: "NULL");
3387 assert(bdrv_get_aio_context(base_bs
) == aio_context
);
3389 for (iter
= top_bs
; iter
!= backing_bs(base_bs
); iter
= backing_bs(iter
)) {
3390 if (bdrv_op_is_blocked(iter
, BLOCK_OP_TYPE_COMMIT_TARGET
, errp
)) {
3395 /* Do not allow attempts to commit an image into itself */
3396 if (top_bs
== base_bs
) {
3397 error_setg(errp
, "cannot commit an image into itself");
3402 if (has_backing_file
) {
3403 error_setg(errp
, "'backing-file' specified,"
3404 " but 'top' is the active layer");
3407 commit_active_start(has_job_id
? job_id
: NULL
, bs
, base_bs
,
3408 JOB_DEFAULT
, speed
, on_error
,
3409 filter_node_name
, NULL
, NULL
, false, &local_err
);
3411 BlockDriverState
*overlay_bs
= bdrv_find_overlay(bs
, top_bs
);
3412 if (bdrv_op_is_blocked(overlay_bs
, BLOCK_OP_TYPE_COMMIT_TARGET
, errp
)) {
3415 commit_start(has_job_id
? job_id
: NULL
, bs
, base_bs
, top_bs
, speed
,
3416 on_error
, has_backing_file
? backing_file
: NULL
,
3417 filter_node_name
, &local_err
);
3419 if (local_err
!= NULL
) {
3420 error_propagate(errp
, local_err
);
3425 aio_context_release(aio_context
);
3428 static BlockJob
*do_drive_backup(DriveBackup
*backup
, JobTxn
*txn
,
3431 BlockDriverState
*bs
;
3432 BlockDriverState
*target_bs
;
3433 BlockDriverState
*source
= NULL
;
3434 BlockJob
*job
= NULL
;
3435 BdrvDirtyBitmap
*bmap
= NULL
;
3436 AioContext
*aio_context
;
3437 QDict
*options
= NULL
;
3438 Error
*local_err
= NULL
;
3439 int flags
, job_flags
= JOB_DEFAULT
;
3441 bool set_backing_hd
= false;
3443 if (!backup
->has_speed
) {
3446 if (!backup
->has_on_source_error
) {
3447 backup
->on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
3449 if (!backup
->has_on_target_error
) {
3450 backup
->on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
3452 if (!backup
->has_mode
) {
3453 backup
->mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
3455 if (!backup
->has_job_id
) {
3456 backup
->job_id
= NULL
;
3458 if (!backup
->has_auto_finalize
) {
3459 backup
->auto_finalize
= true;
3461 if (!backup
->has_auto_dismiss
) {
3462 backup
->auto_dismiss
= true;
3464 if (!backup
->has_compress
) {
3465 backup
->compress
= false;
3468 bs
= qmp_get_root_bs(backup
->device
, errp
);
3473 aio_context
= bdrv_get_aio_context(bs
);
3474 aio_context_acquire(aio_context
);
3476 if (!backup
->has_format
) {
3477 backup
->format
= backup
->mode
== NEW_IMAGE_MODE_EXISTING
?
3478 NULL
: (char*) bs
->drv
->format_name
;
3481 /* Early check to avoid creating target */
3482 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_BACKUP_SOURCE
, errp
)) {
3486 flags
= bs
->open_flags
| BDRV_O_RDWR
;
3488 /* See if we have a backing HD we can use to create our new image
3490 if (backup
->sync
== MIRROR_SYNC_MODE_TOP
) {
3491 source
= backing_bs(bs
);
3493 backup
->sync
= MIRROR_SYNC_MODE_FULL
;
3496 if (backup
->sync
== MIRROR_SYNC_MODE_NONE
) {
3498 flags
|= BDRV_O_NO_BACKING
;
3499 set_backing_hd
= true;
3502 size
= bdrv_getlength(bs
);
3504 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
3508 if (backup
->mode
!= NEW_IMAGE_MODE_EXISTING
) {
3509 assert(backup
->format
);
3511 bdrv_img_create(backup
->target
, backup
->format
, source
->filename
,
3512 source
->drv
->format_name
, NULL
,
3513 size
, flags
, false, &local_err
);
3515 bdrv_img_create(backup
->target
, backup
->format
, NULL
, NULL
, NULL
,
3516 size
, flags
, false, &local_err
);
3521 error_propagate(errp
, local_err
);
3525 if (backup
->format
) {
3527 options
= qdict_new();
3529 qdict_put_str(options
, "driver", backup
->format
);
3532 target_bs
= bdrv_open(backup
->target
, NULL
, options
, flags
, errp
);
3537 bdrv_set_aio_context(target_bs
, aio_context
);
3539 if (set_backing_hd
) {
3540 bdrv_set_backing_hd(target_bs
, source
, &local_err
);
3542 bdrv_unref(target_bs
);
3547 if (backup
->has_bitmap
) {
3548 bmap
= bdrv_find_dirty_bitmap(bs
, backup
->bitmap
);
3550 error_setg(errp
, "Bitmap '%s' could not be found", backup
->bitmap
);
3551 bdrv_unref(target_bs
);
3554 if (bdrv_dirty_bitmap_qmp_locked(bmap
)) {
3556 "Bitmap '%s' is currently locked and cannot be used for "
3557 "backup", backup
->bitmap
);
3561 if (!backup
->auto_finalize
) {
3562 job_flags
|= JOB_MANUAL_FINALIZE
;
3564 if (!backup
->auto_dismiss
) {
3565 job_flags
|= JOB_MANUAL_DISMISS
;
3568 job
= backup_job_create(backup
->job_id
, bs
, target_bs
, backup
->speed
,
3569 backup
->sync
, bmap
, backup
->compress
,
3570 backup
->on_source_error
, backup
->on_target_error
,
3571 job_flags
, NULL
, NULL
, txn
, &local_err
);
3572 bdrv_unref(target_bs
);
3573 if (local_err
!= NULL
) {
3574 error_propagate(errp
, local_err
);
3579 aio_context_release(aio_context
);
3583 void qmp_drive_backup(DriveBackup
*arg
, Error
**errp
)
3587 job
= do_drive_backup(arg
, NULL
, errp
);
3589 job_start(&job
->job
);
3593 BlockDeviceInfoList
*qmp_query_named_block_nodes(Error
**errp
)
3595 return bdrv_named_nodes_list(errp
);
3598 BlockJob
*do_blockdev_backup(BlockdevBackup
*backup
, JobTxn
*txn
,
3601 BlockDriverState
*bs
;
3602 BlockDriverState
*target_bs
;
3603 Error
*local_err
= NULL
;
3604 AioContext
*aio_context
;
3605 BlockJob
*job
= NULL
;
3606 int job_flags
= JOB_DEFAULT
;
3608 if (!backup
->has_speed
) {
3611 if (!backup
->has_on_source_error
) {
3612 backup
->on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
3614 if (!backup
->has_on_target_error
) {
3615 backup
->on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
3617 if (!backup
->has_job_id
) {
3618 backup
->job_id
= NULL
;
3620 if (!backup
->has_auto_finalize
) {
3621 backup
->auto_finalize
= true;
3623 if (!backup
->has_auto_dismiss
) {
3624 backup
->auto_dismiss
= true;
3626 if (!backup
->has_compress
) {
3627 backup
->compress
= false;
3630 bs
= bdrv_lookup_bs(backup
->device
, backup
->device
, errp
);
3635 aio_context
= bdrv_get_aio_context(bs
);
3636 aio_context_acquire(aio_context
);
3638 target_bs
= bdrv_lookup_bs(backup
->target
, backup
->target
, errp
);
3643 if (bdrv_get_aio_context(target_bs
) != aio_context
) {
3644 if (!bdrv_has_blk(target_bs
)) {
3645 /* The target BDS is not attached, we can safely move it to another
3647 bdrv_set_aio_context(target_bs
, aio_context
);
3649 error_setg(errp
, "Target is attached to a different thread from "
3654 if (!backup
->auto_finalize
) {
3655 job_flags
|= JOB_MANUAL_FINALIZE
;
3657 if (!backup
->auto_dismiss
) {
3658 job_flags
|= JOB_MANUAL_DISMISS
;
3660 job
= backup_job_create(backup
->job_id
, bs
, target_bs
, backup
->speed
,
3661 backup
->sync
, NULL
, backup
->compress
,
3662 backup
->on_source_error
, backup
->on_target_error
,
3663 job_flags
, NULL
, NULL
, txn
, &local_err
);
3664 if (local_err
!= NULL
) {
3665 error_propagate(errp
, local_err
);
3668 aio_context_release(aio_context
);
3672 void qmp_blockdev_backup(BlockdevBackup
*arg
, Error
**errp
)
3675 job
= do_blockdev_backup(arg
, NULL
, errp
);
3677 job_start(&job
->job
);
3681 /* Parameter check and block job starting for drive mirroring.
3682 * Caller should hold @device and @target's aio context (must be the same).
3684 static void blockdev_mirror_common(const char *job_id
, BlockDriverState
*bs
,
3685 BlockDriverState
*target
,
3686 bool has_replaces
, const char *replaces
,
3687 enum MirrorSyncMode sync
,
3688 BlockMirrorBackingMode backing_mode
,
3689 bool has_speed
, int64_t speed
,
3690 bool has_granularity
, uint32_t granularity
,
3691 bool has_buf_size
, int64_t buf_size
,
3692 bool has_on_source_error
,
3693 BlockdevOnError on_source_error
,
3694 bool has_on_target_error
,
3695 BlockdevOnError on_target_error
,
3696 bool has_unmap
, bool unmap
,
3697 bool has_filter_node_name
,
3698 const char *filter_node_name
,
3699 bool has_copy_mode
, MirrorCopyMode copy_mode
,
3706 if (!has_on_source_error
) {
3707 on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
3709 if (!has_on_target_error
) {
3710 on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
3712 if (!has_granularity
) {
3715 if (!has_buf_size
) {
3721 if (!has_filter_node_name
) {
3722 filter_node_name
= NULL
;
3724 if (!has_copy_mode
) {
3725 copy_mode
= MIRROR_COPY_MODE_BACKGROUND
;
3728 if (granularity
!= 0 && (granularity
< 512 || granularity
> 1048576 * 64)) {
3729 error_setg(errp
, QERR_INVALID_PARAMETER_VALUE
, "granularity",
3730 "a value in range [512B, 64MB]");
3733 if (granularity
& (granularity
- 1)) {
3734 error_setg(errp
, QERR_INVALID_PARAMETER_VALUE
, "granularity",
3739 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_MIRROR_SOURCE
, errp
)) {
3742 if (bdrv_op_is_blocked(target
, BLOCK_OP_TYPE_MIRROR_TARGET
, errp
)) {
3746 if (!bs
->backing
&& sync
== MIRROR_SYNC_MODE_TOP
) {
3747 sync
= MIRROR_SYNC_MODE_FULL
;
3750 /* pass the node name to replace to mirror start since it's loose coupling
3751 * and will allow to check whether the node still exist at mirror completion
3753 mirror_start(job_id
, bs
, target
,
3754 has_replaces
? replaces
: NULL
,
3755 speed
, granularity
, buf_size
, sync
, backing_mode
,
3756 on_source_error
, on_target_error
, unmap
, filter_node_name
,
3760 void qmp_drive_mirror(DriveMirror
*arg
, Error
**errp
)
3762 BlockDriverState
*bs
;
3763 BlockDriverState
*source
, *target_bs
;
3764 AioContext
*aio_context
;
3765 BlockMirrorBackingMode backing_mode
;
3766 Error
*local_err
= NULL
;
3767 QDict
*options
= NULL
;
3770 const char *format
= arg
->format
;
3772 bs
= qmp_get_root_bs(arg
->device
, errp
);
3777 /* Early check to avoid creating target */
3778 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_MIRROR_SOURCE
, errp
)) {
3782 aio_context
= bdrv_get_aio_context(bs
);
3783 aio_context_acquire(aio_context
);
3785 if (!arg
->has_mode
) {
3786 arg
->mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
3789 if (!arg
->has_format
) {
3790 format
= (arg
->mode
== NEW_IMAGE_MODE_EXISTING
3791 ? NULL
: bs
->drv
->format_name
);
3794 flags
= bs
->open_flags
| BDRV_O_RDWR
;
3795 source
= backing_bs(bs
);
3796 if (!source
&& arg
->sync
== MIRROR_SYNC_MODE_TOP
) {
3797 arg
->sync
= MIRROR_SYNC_MODE_FULL
;
3799 if (arg
->sync
== MIRROR_SYNC_MODE_NONE
) {
3803 size
= bdrv_getlength(bs
);
3805 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
3809 if (arg
->has_replaces
) {
3810 BlockDriverState
*to_replace_bs
;
3811 AioContext
*replace_aio_context
;
3812 int64_t replace_size
;
3814 if (!arg
->has_node_name
) {
3815 error_setg(errp
, "a node-name must be provided when replacing a"
3816 " named node of the graph");
3820 to_replace_bs
= check_to_replace_node(bs
, arg
->replaces
, &local_err
);
3822 if (!to_replace_bs
) {
3823 error_propagate(errp
, local_err
);
3827 replace_aio_context
= bdrv_get_aio_context(to_replace_bs
);
3828 aio_context_acquire(replace_aio_context
);
3829 replace_size
= bdrv_getlength(to_replace_bs
);
3830 aio_context_release(replace_aio_context
);
3832 if (size
!= replace_size
) {
3833 error_setg(errp
, "cannot replace image with a mirror image of "
3839 if (arg
->mode
== NEW_IMAGE_MODE_ABSOLUTE_PATHS
) {
3840 backing_mode
= MIRROR_SOURCE_BACKING_CHAIN
;
3842 backing_mode
= MIRROR_OPEN_BACKING_CHAIN
;
3845 /* Don't open backing image in create() */
3846 flags
|= BDRV_O_NO_BACKING
;
3848 if ((arg
->sync
== MIRROR_SYNC_MODE_FULL
|| !source
)
3849 && arg
->mode
!= NEW_IMAGE_MODE_EXISTING
)
3851 /* create new image w/o backing file */
3853 bdrv_img_create(arg
->target
, format
,
3854 NULL
, NULL
, NULL
, size
, flags
, false, &local_err
);
3856 switch (arg
->mode
) {
3857 case NEW_IMAGE_MODE_EXISTING
:
3859 case NEW_IMAGE_MODE_ABSOLUTE_PATHS
:
3860 /* create new image with backing file */
3861 bdrv_img_create(arg
->target
, format
,
3863 source
->drv
->format_name
,
3864 NULL
, size
, flags
, false, &local_err
);
3872 error_propagate(errp
, local_err
);
3876 options
= qdict_new();
3877 if (arg
->has_node_name
) {
3878 qdict_put_str(options
, "node-name", arg
->node_name
);
3881 qdict_put_str(options
, "driver", format
);
3884 /* Mirroring takes care of copy-on-write using the source's backing
3887 target_bs
= bdrv_open(arg
->target
, NULL
, options
, flags
, errp
);
3892 bdrv_set_aio_context(target_bs
, aio_context
);
3894 blockdev_mirror_common(arg
->has_job_id
? arg
->job_id
: NULL
, bs
, target_bs
,
3895 arg
->has_replaces
, arg
->replaces
, arg
->sync
,
3896 backing_mode
, arg
->has_speed
, arg
->speed
,
3897 arg
->has_granularity
, arg
->granularity
,
3898 arg
->has_buf_size
, arg
->buf_size
,
3899 arg
->has_on_source_error
, arg
->on_source_error
,
3900 arg
->has_on_target_error
, arg
->on_target_error
,
3901 arg
->has_unmap
, arg
->unmap
,
3903 arg
->has_copy_mode
, arg
->copy_mode
,
3905 bdrv_unref(target_bs
);
3906 error_propagate(errp
, local_err
);
3908 aio_context_release(aio_context
);
3911 void qmp_blockdev_mirror(bool has_job_id
, const char *job_id
,
3912 const char *device
, const char *target
,
3913 bool has_replaces
, const char *replaces
,
3914 MirrorSyncMode sync
,
3915 bool has_speed
, int64_t speed
,
3916 bool has_granularity
, uint32_t granularity
,
3917 bool has_buf_size
, int64_t buf_size
,
3918 bool has_on_source_error
,
3919 BlockdevOnError on_source_error
,
3920 bool has_on_target_error
,
3921 BlockdevOnError on_target_error
,
3922 bool has_filter_node_name
,
3923 const char *filter_node_name
,
3924 bool has_copy_mode
, MirrorCopyMode copy_mode
,
3927 BlockDriverState
*bs
;
3928 BlockDriverState
*target_bs
;
3929 AioContext
*aio_context
;
3930 BlockMirrorBackingMode backing_mode
= MIRROR_LEAVE_BACKING_CHAIN
;
3931 Error
*local_err
= NULL
;
3933 bs
= qmp_get_root_bs(device
, errp
);
3938 target_bs
= bdrv_lookup_bs(target
, target
, errp
);
3943 aio_context
= bdrv_get_aio_context(bs
);
3944 aio_context_acquire(aio_context
);
3946 bdrv_set_aio_context(target_bs
, aio_context
);
3948 blockdev_mirror_common(has_job_id
? job_id
: NULL
, bs
, target_bs
,
3949 has_replaces
, replaces
, sync
, backing_mode
,
3951 has_granularity
, granularity
,
3952 has_buf_size
, buf_size
,
3953 has_on_source_error
, on_source_error
,
3954 has_on_target_error
, on_target_error
,
3956 has_filter_node_name
, filter_node_name
,
3957 has_copy_mode
, copy_mode
,
3959 error_propagate(errp
, local_err
);
3961 aio_context_release(aio_context
);
3964 /* Get a block job using its ID and acquire its AioContext */
3965 static BlockJob
*find_block_job(const char *id
, AioContext
**aio_context
,
3972 *aio_context
= NULL
;
3974 job
= block_job_get(id
);
3977 error_set(errp
, ERROR_CLASS_DEVICE_NOT_ACTIVE
,
3978 "Block job '%s' not found", id
);
3982 *aio_context
= blk_get_aio_context(job
->blk
);
3983 aio_context_acquire(*aio_context
);
3988 void qmp_block_job_set_speed(const char *device
, int64_t speed
, Error
**errp
)
3990 AioContext
*aio_context
;
3991 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
3997 block_job_set_speed(job
, speed
, errp
);
3998 aio_context_release(aio_context
);
4001 void qmp_block_job_cancel(const char *device
,
4002 bool has_force
, bool force
, Error
**errp
)
4004 AioContext
*aio_context
;
4005 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
4015 if (job_user_paused(&job
->job
) && !force
) {
4016 error_setg(errp
, "The block job for device '%s' is currently paused",
4021 trace_qmp_block_job_cancel(job
);
4022 job_user_cancel(&job
->job
, force
, errp
);
4024 aio_context_release(aio_context
);
4027 void qmp_block_job_pause(const char *device
, Error
**errp
)
4029 AioContext
*aio_context
;
4030 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
4036 trace_qmp_block_job_pause(job
);
4037 job_user_pause(&job
->job
, errp
);
4038 aio_context_release(aio_context
);
4041 void qmp_block_job_resume(const char *device
, Error
**errp
)
4043 AioContext
*aio_context
;
4044 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
4050 trace_qmp_block_job_resume(job
);
4051 job_user_resume(&job
->job
, errp
);
4052 aio_context_release(aio_context
);
4055 void qmp_block_job_complete(const char *device
, Error
**errp
)
4057 AioContext
*aio_context
;
4058 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
4064 trace_qmp_block_job_complete(job
);
4065 job_complete(&job
->job
, errp
);
4066 aio_context_release(aio_context
);
4069 void qmp_block_job_finalize(const char *id
, Error
**errp
)
4071 AioContext
*aio_context
;
4072 BlockJob
*job
= find_block_job(id
, &aio_context
, errp
);
4078 trace_qmp_block_job_finalize(job
);
4079 job_finalize(&job
->job
, errp
);
4080 aio_context_release(aio_context
);
4083 void qmp_block_job_dismiss(const char *id
, Error
**errp
)
4085 AioContext
*aio_context
;
4086 BlockJob
*bjob
= find_block_job(id
, &aio_context
, errp
);
4093 trace_qmp_block_job_dismiss(bjob
);
4095 job_dismiss(&job
, errp
);
4096 aio_context_release(aio_context
);
4099 void qmp_change_backing_file(const char *device
,
4100 const char *image_node_name
,
4101 const char *backing_file
,
4104 BlockDriverState
*bs
= NULL
;
4105 AioContext
*aio_context
;
4106 BlockDriverState
*image_bs
= NULL
;
4107 Error
*local_err
= NULL
;
4112 bs
= qmp_get_root_bs(device
, errp
);
4117 aio_context
= bdrv_get_aio_context(bs
);
4118 aio_context_acquire(aio_context
);
4120 image_bs
= bdrv_lookup_bs(NULL
, image_node_name
, &local_err
);
4122 error_propagate(errp
, local_err
);
4127 error_setg(errp
, "image file not found");
4131 if (bdrv_find_base(image_bs
) == image_bs
) {
4132 error_setg(errp
, "not allowing backing file change on an image "
4133 "without a backing file");
4137 /* even though we are not necessarily operating on bs, we need it to
4138 * determine if block ops are currently prohibited on the chain */
4139 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_CHANGE
, errp
)) {
4143 /* final sanity check */
4144 if (!bdrv_chain_contains(bs
, image_bs
)) {
4145 error_setg(errp
, "'%s' and image file are not in the same chain",
4150 /* if not r/w, reopen to make r/w */
4151 open_flags
= image_bs
->open_flags
;
4152 ro
= bdrv_is_read_only(image_bs
);
4155 bdrv_reopen(image_bs
, open_flags
| BDRV_O_RDWR
, &local_err
);
4157 error_propagate(errp
, local_err
);
4162 ret
= bdrv_change_backing_file(image_bs
, backing_file
,
4163 image_bs
->drv
? image_bs
->drv
->format_name
: "");
4166 error_setg_errno(errp
, -ret
, "Could not change backing file to '%s'",
4168 /* don't exit here, so we can try to restore open flags if
4173 bdrv_reopen(image_bs
, open_flags
, &local_err
);
4174 error_propagate(errp
, local_err
);
4178 aio_context_release(aio_context
);
4181 void hmp_drive_add_node(Monitor
*mon
, const char *optstr
)
4185 Error
*local_err
= NULL
;
4187 opts
= qemu_opts_parse_noisily(&qemu_drive_opts
, optstr
, false);
4192 qdict
= qemu_opts_to_qdict(opts
, NULL
);
4194 if (!qdict_get_try_str(qdict
, "node-name")) {
4195 qobject_unref(qdict
);
4196 error_report("'node-name' needs to be specified");
4200 BlockDriverState
*bs
= bds_tree_init(qdict
, &local_err
);
4202 error_report_err(local_err
);
4206 QTAILQ_INSERT_TAIL(&monitor_bdrv_states
, bs
, monitor_list
);
4209 qemu_opts_del(opts
);
4212 void qmp_blockdev_add(BlockdevOptions
*options
, Error
**errp
)
4214 BlockDriverState
*bs
;
4216 Visitor
*v
= qobject_output_visitor_new(&obj
);
4218 Error
*local_err
= NULL
;
4220 visit_type_BlockdevOptions(v
, NULL
, &options
, &local_err
);
4222 error_propagate(errp
, local_err
);
4226 visit_complete(v
, &obj
);
4227 qdict
= qobject_to(QDict
, obj
);
4229 qdict_flatten(qdict
);
4231 if (!qdict_get_try_str(qdict
, "node-name")) {
4232 error_setg(errp
, "'node-name' must be specified for the root node");
4236 bs
= bds_tree_init(qdict
, errp
);
4241 QTAILQ_INSERT_TAIL(&monitor_bdrv_states
, bs
, monitor_list
);
4247 void qmp_blockdev_del(const char *node_name
, Error
**errp
)
4249 AioContext
*aio_context
;
4250 BlockDriverState
*bs
;
4252 bs
= bdrv_find_node(node_name
);
4254 error_setg(errp
, "Cannot find node %s", node_name
);
4257 if (bdrv_has_blk(bs
)) {
4258 error_setg(errp
, "Node %s is in use", node_name
);
4261 aio_context
= bdrv_get_aio_context(bs
);
4262 aio_context_acquire(aio_context
);
4264 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_DRIVE_DEL
, errp
)) {
4268 if (!bs
->monitor_list
.tqe_prev
) {
4269 error_setg(errp
, "Node %s is not owned by the monitor",
4274 if (bs
->refcnt
> 1) {
4275 error_setg(errp
, "Block device %s is in use",
4276 bdrv_get_device_or_node_name(bs
));
4280 QTAILQ_REMOVE(&monitor_bdrv_states
, bs
, monitor_list
);
4284 aio_context_release(aio_context
);
4287 static BdrvChild
*bdrv_find_child(BlockDriverState
*parent_bs
,
4288 const char *child_name
)
4292 QLIST_FOREACH(child
, &parent_bs
->children
, next
) {
4293 if (strcmp(child
->name
, child_name
) == 0) {
4301 void qmp_x_blockdev_change(const char *parent
, bool has_child
,
4302 const char *child
, bool has_node
,
4303 const char *node
, Error
**errp
)
4305 BlockDriverState
*parent_bs
, *new_bs
= NULL
;
4308 parent_bs
= bdrv_lookup_bs(parent
, parent
, errp
);
4313 if (has_child
== has_node
) {
4315 error_setg(errp
, "The parameters child and node are in conflict");
4317 error_setg(errp
, "Either child or node must be specified");
4323 p_child
= bdrv_find_child(parent_bs
, child
);
4325 error_setg(errp
, "Node '%s' does not have child '%s'",
4329 bdrv_del_child(parent_bs
, p_child
, errp
);
4333 new_bs
= bdrv_find_node(node
);
4335 error_setg(errp
, "Node '%s' not found", node
);
4338 bdrv_add_child(parent_bs
, new_bs
, errp
);
4342 BlockJobInfoList
*qmp_query_block_jobs(Error
**errp
)
4344 BlockJobInfoList
*head
= NULL
, **p_next
= &head
;
4347 for (job
= block_job_next(NULL
); job
; job
= block_job_next(job
)) {
4348 BlockJobInfoList
*elem
;
4349 AioContext
*aio_context
;
4351 if (block_job_is_internal(job
)) {
4354 elem
= g_new0(BlockJobInfoList
, 1);
4355 aio_context
= blk_get_aio_context(job
->blk
);
4356 aio_context_acquire(aio_context
);
4357 elem
->value
= block_job_query(job
, errp
);
4358 aio_context_release(aio_context
);
4361 qapi_free_BlockJobInfoList(head
);
4365 p_next
= &elem
->next
;
4371 void qmp_x_blockdev_set_iothread(const char *node_name
, StrOrNull
*iothread
,
4372 bool has_force
, bool force
, Error
**errp
)
4374 AioContext
*old_context
;
4375 AioContext
*new_context
;
4376 BlockDriverState
*bs
;
4378 bs
= bdrv_find_node(node_name
);
4380 error_setg(errp
, "Cannot find node %s", node_name
);
4384 /* Protects against accidents. */
4385 if (!(has_force
&& force
) && bdrv_has_blk(bs
)) {
4386 error_setg(errp
, "Node %s is associated with a BlockBackend and could "
4387 "be in use (use force=true to override this check)",
4392 if (iothread
->type
== QTYPE_QSTRING
) {
4393 IOThread
*obj
= iothread_by_id(iothread
->u
.s
);
4395 error_setg(errp
, "Cannot find iothread %s", iothread
->u
.s
);
4399 new_context
= iothread_get_aio_context(obj
);
4401 new_context
= qemu_get_aio_context();
4404 old_context
= bdrv_get_aio_context(bs
);
4405 aio_context_acquire(old_context
);
4407 bdrv_set_aio_context(bs
, new_context
);
4409 aio_context_release(old_context
);
4412 void qmp_x_block_latency_histogram_set(
4414 bool has_boundaries
, uint64List
*boundaries
,
4415 bool has_boundaries_read
, uint64List
*boundaries_read
,
4416 bool has_boundaries_write
, uint64List
*boundaries_write
,
4417 bool has_boundaries_flush
, uint64List
*boundaries_flush
,
4420 BlockBackend
*blk
= blk_by_name(device
);
4421 BlockAcctStats
*stats
;
4424 error_setg(errp
, "Device '%s' not found", device
);
4427 stats
= blk_get_stats(blk
);
4429 if (!has_boundaries
&& !has_boundaries_read
&& !has_boundaries_write
&&
4430 !has_boundaries_flush
)
4432 block_latency_histograms_clear(stats
);
4436 if (has_boundaries
|| has_boundaries_read
) {
4437 block_latency_histogram_set(
4438 stats
, BLOCK_ACCT_READ
,
4439 has_boundaries_read
? boundaries_read
: boundaries
);
4442 if (has_boundaries
|| has_boundaries_write
) {
4443 block_latency_histogram_set(
4444 stats
, BLOCK_ACCT_WRITE
,
4445 has_boundaries_write
? boundaries_write
: boundaries
);
4448 if (has_boundaries
|| has_boundaries_flush
) {
4449 block_latency_histogram_set(
4450 stats
, BLOCK_ACCT_FLUSH
,
4451 has_boundaries_flush
? boundaries_flush
: boundaries
);
4455 QemuOptsList qemu_common_drive_opts
= {
4457 .head
= QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts
.head
),
4461 .type
= QEMU_OPT_BOOL
,
4462 .help
= "enable/disable snapshot mode",
4465 .type
= QEMU_OPT_STRING
,
4466 .help
= "host AIO implementation (threads, native)",
4468 .name
= BDRV_OPT_CACHE_WB
,
4469 .type
= QEMU_OPT_BOOL
,
4470 .help
= "Enable writeback mode",
4473 .type
= QEMU_OPT_STRING
,
4474 .help
= "disk format (raw, qcow2, ...)",
4477 .type
= QEMU_OPT_STRING
,
4478 .help
= "read error action",
4481 .type
= QEMU_OPT_STRING
,
4482 .help
= "write error action",
4484 .name
= BDRV_OPT_READ_ONLY
,
4485 .type
= QEMU_OPT_BOOL
,
4486 .help
= "open drive file as read-only",
4492 .name
= "throttling.group",
4493 .type
= QEMU_OPT_STRING
,
4494 .help
= "name of the block throttling group",
4496 .name
= "copy-on-read",
4497 .type
= QEMU_OPT_BOOL
,
4498 .help
= "copy read data from backing file into image file",
4500 .name
= "detect-zeroes",
4501 .type
= QEMU_OPT_STRING
,
4502 .help
= "try to optimize zero writes (off, on, unmap)",
4504 .name
= "stats-account-invalid",
4505 .type
= QEMU_OPT_BOOL
,
4506 .help
= "whether to account for invalid I/O operations "
4507 "in the statistics",
4509 .name
= "stats-account-failed",
4510 .type
= QEMU_OPT_BOOL
,
4511 .help
= "whether to account for failed I/O operations "
4512 "in the statistics",
4514 { /* end of list */ }
4518 QemuOptsList qemu_drive_opts
= {
4520 .head
= QTAILQ_HEAD_INITIALIZER(qemu_drive_opts
.head
),
4523 * no elements => accept any params
4524 * validation will happen later
4526 { /* end of list */ }