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/qemu-print.h"
44 #include "qemu/config-file.h"
45 #include "qapi/qapi-commands-block.h"
46 #include "qapi/qapi-commands-transaction.h"
47 #include "qapi/qapi-visit-block-core.h"
48 #include "qapi/qmp/qdict.h"
49 #include "qapi/qmp/qnum.h"
50 #include "qapi/qmp/qstring.h"
51 #include "qapi/error.h"
52 #include "qapi/qmp/qerror.h"
53 #include "qapi/qmp/qlist.h"
54 #include "qapi/qobject-output-visitor.h"
55 #include "sysemu/sysemu.h"
56 #include "sysemu/iothread.h"
57 #include "block/block_int.h"
58 #include "block/trace.h"
59 #include "sysemu/arch_init.h"
60 #include "sysemu/qtest.h"
61 #include "sysemu/runstate.h"
62 #include "qemu/cutils.h"
63 #include "qemu/help_option.h"
64 #include "qemu/main-loop.h"
65 #include "qemu/throttle-options.h"
67 static QTAILQ_HEAD(, BlockDriverState
) monitor_bdrv_states
=
68 QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states
);
70 static const char *const if_name
[IF_COUNT
] = {
74 [IF_FLOPPY
] = "floppy",
75 [IF_PFLASH
] = "pflash",
78 [IF_VIRTIO
] = "virtio",
82 static int if_max_devs
[IF_COUNT
] = {
84 * Do not change these numbers! They govern how drive option
85 * index maps to unit and bus. That mapping is ABI.
87 * All controllers used to implement if=T drives need to support
88 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
89 * Otherwise, some index values map to "impossible" bus, unit
92 * For instance, if you change [IF_SCSI] to 255, -drive
93 * if=scsi,index=12 no longer means bus=1,unit=5, but
94 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
95 * the drive can't be set up. Regression.
102 * Boards may call this to offer board-by-board overrides
103 * of the default, global values.
105 void override_max_devs(BlockInterfaceType type
, int max_devs
)
114 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
115 dinfo
= blk_legacy_dinfo(blk
);
116 if (dinfo
->type
== type
) {
117 fprintf(stderr
, "Cannot override units-per-bus property of"
118 " the %s interface, because a drive of that type has"
119 " already been added.\n", if_name
[type
]);
120 g_assert_not_reached();
124 if_max_devs
[type
] = max_devs
;
128 * We automatically delete the drive when a device using it gets
129 * unplugged. Questionable feature, but we can't just drop it.
130 * Device models call blockdev_mark_auto_del() to schedule the
131 * automatic deletion, and generic qdev code calls blockdev_auto_del()
132 * when deletion is actually safe.
134 void blockdev_mark_auto_del(BlockBackend
*blk
)
136 DriveInfo
*dinfo
= blk_legacy_dinfo(blk
);
143 for (job
= block_job_next(NULL
); job
; job
= block_job_next(job
)) {
144 if (block_job_has_bdrv(job
, blk_bs(blk
))) {
145 AioContext
*aio_context
= job
->job
.aio_context
;
146 aio_context_acquire(aio_context
);
148 job_cancel(&job
->job
, false);
150 aio_context_release(aio_context
);
157 void blockdev_auto_del(BlockBackend
*blk
)
159 DriveInfo
*dinfo
= blk_legacy_dinfo(blk
);
161 if (dinfo
&& dinfo
->auto_del
) {
162 monitor_remove_blk(blk
);
168 * Returns the current mapping of how many units per bus
169 * a particular interface can support.
171 * A positive integer indicates n units per bus.
172 * 0 implies the mapping has not been established.
173 * -1 indicates an invalid BlockInterfaceType was given.
175 int drive_get_max_devs(BlockInterfaceType type
)
177 if (type
>= IF_IDE
&& type
< IF_COUNT
) {
178 return if_max_devs
[type
];
184 static int drive_index_to_bus_id(BlockInterfaceType type
, int index
)
186 int max_devs
= if_max_devs
[type
];
187 return max_devs
? index
/ max_devs
: 0;
190 static int drive_index_to_unit_id(BlockInterfaceType type
, int index
)
192 int max_devs
= if_max_devs
[type
];
193 return max_devs
? index
% max_devs
: index
;
196 QemuOpts
*drive_def(const char *optstr
)
198 return qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr
, false);
201 QemuOpts
*drive_add(BlockInterfaceType type
, int index
, const char *file
,
206 opts
= drive_def(optstr
);
210 if (type
!= IF_DEFAULT
) {
211 qemu_opt_set(opts
, "if", if_name
[type
], &error_abort
);
214 qemu_opt_set_number(opts
, "index", index
, &error_abort
);
217 qemu_opt_set(opts
, "file", file
, &error_abort
);
221 DriveInfo
*drive_get(BlockInterfaceType type
, int bus
, int unit
)
226 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
227 dinfo
= blk_legacy_dinfo(blk
);
228 if (dinfo
&& dinfo
->type
== type
229 && dinfo
->bus
== bus
&& dinfo
->unit
== unit
) {
237 void drive_check_orphaned(void)
242 bool orphans
= false;
244 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
245 dinfo
= blk_legacy_dinfo(blk
);
246 if (!blk_get_attached_dev(blk
) && !dinfo
->is_default
&&
247 dinfo
->type
!= IF_NONE
) {
249 qemu_opts_loc_restore(dinfo
->opts
);
250 error_report("machine type does not support"
251 " if=%s,bus=%d,unit=%d",
252 if_name
[dinfo
->type
], dinfo
->bus
, dinfo
->unit
);
263 DriveInfo
*drive_get_by_index(BlockInterfaceType type
, int index
)
265 return drive_get(type
,
266 drive_index_to_bus_id(type
, index
),
267 drive_index_to_unit_id(type
, index
));
270 int drive_get_max_bus(BlockInterfaceType type
)
277 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
278 dinfo
= blk_legacy_dinfo(blk
);
279 if (dinfo
&& dinfo
->type
== type
&& dinfo
->bus
> max_bus
) {
280 max_bus
= dinfo
->bus
;
286 /* Get a block device. This should only be used for single-drive devices
287 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
289 DriveInfo
*drive_get_next(BlockInterfaceType type
)
291 static int next_block_unit
[IF_COUNT
];
293 return drive_get(type
, 0, next_block_unit
[type
]++);
296 static void bdrv_format_print(void *opaque
, const char *name
)
298 qemu_printf(" %s", name
);
303 BlockDriverState
*bs
;
306 static int parse_block_error_action(const char *buf
, bool is_read
, Error
**errp
)
308 if (!strcmp(buf
, "ignore")) {
309 return BLOCKDEV_ON_ERROR_IGNORE
;
310 } else if (!is_read
&& !strcmp(buf
, "enospc")) {
311 return BLOCKDEV_ON_ERROR_ENOSPC
;
312 } else if (!strcmp(buf
, "stop")) {
313 return BLOCKDEV_ON_ERROR_STOP
;
314 } else if (!strcmp(buf
, "report")) {
315 return BLOCKDEV_ON_ERROR_REPORT
;
317 error_setg(errp
, "'%s' invalid %s error action",
318 buf
, is_read
? "read" : "write");
323 static bool parse_stats_intervals(BlockAcctStats
*stats
, QList
*intervals
,
326 const QListEntry
*entry
;
327 for (entry
= qlist_first(intervals
); entry
; entry
= qlist_next(entry
)) {
328 switch (qobject_type(entry
->value
)) {
330 case QTYPE_QSTRING
: {
331 unsigned long long length
;
332 const char *str
= qstring_get_str(qobject_to(QString
,
334 if (parse_uint_full(str
, &length
, 10) == 0 &&
335 length
> 0 && length
<= UINT_MAX
) {
336 block_acct_add_interval(stats
, (unsigned) length
);
338 error_setg(errp
, "Invalid interval length: %s", str
);
345 int64_t length
= qnum_get_int(qobject_to(QNum
, entry
->value
));
347 if (length
> 0 && length
<= UINT_MAX
) {
348 block_acct_add_interval(stats
, (unsigned) length
);
350 error_setg(errp
, "Invalid interval length: %" PRId64
, length
);
357 error_setg(errp
, "The specification of stats-intervals is invalid");
364 typedef enum { MEDIA_DISK
, MEDIA_CDROM
} DriveMediaType
;
366 /* All parameters but @opts are optional and may be set to NULL. */
367 static void extract_common_blockdev_options(QemuOpts
*opts
, int *bdrv_flags
,
368 const char **throttling_group
, ThrottleConfig
*throttle_cfg
,
369 BlockdevDetectZeroesOptions
*detect_zeroes
, Error
**errp
)
371 Error
*local_error
= NULL
;
375 if (qemu_opt_get_bool(opts
, "copy-on-read", false)) {
376 *bdrv_flags
|= BDRV_O_COPY_ON_READ
;
379 if ((aio
= qemu_opt_get(opts
, "aio")) != NULL
) {
380 if (bdrv_parse_aio(aio
, bdrv_flags
) < 0) {
381 error_setg(errp
, "invalid aio option");
387 /* disk I/O throttling */
388 if (throttling_group
) {
389 *throttling_group
= qemu_opt_get(opts
, "throttling.group");
393 throttle_config_init(throttle_cfg
);
394 throttle_cfg
->buckets
[THROTTLE_BPS_TOTAL
].avg
=
395 qemu_opt_get_number(opts
, "throttling.bps-total", 0);
396 throttle_cfg
->buckets
[THROTTLE_BPS_READ
].avg
=
397 qemu_opt_get_number(opts
, "throttling.bps-read", 0);
398 throttle_cfg
->buckets
[THROTTLE_BPS_WRITE
].avg
=
399 qemu_opt_get_number(opts
, "throttling.bps-write", 0);
400 throttle_cfg
->buckets
[THROTTLE_OPS_TOTAL
].avg
=
401 qemu_opt_get_number(opts
, "throttling.iops-total", 0);
402 throttle_cfg
->buckets
[THROTTLE_OPS_READ
].avg
=
403 qemu_opt_get_number(opts
, "throttling.iops-read", 0);
404 throttle_cfg
->buckets
[THROTTLE_OPS_WRITE
].avg
=
405 qemu_opt_get_number(opts
, "throttling.iops-write", 0);
407 throttle_cfg
->buckets
[THROTTLE_BPS_TOTAL
].max
=
408 qemu_opt_get_number(opts
, "throttling.bps-total-max", 0);
409 throttle_cfg
->buckets
[THROTTLE_BPS_READ
].max
=
410 qemu_opt_get_number(opts
, "throttling.bps-read-max", 0);
411 throttle_cfg
->buckets
[THROTTLE_BPS_WRITE
].max
=
412 qemu_opt_get_number(opts
, "throttling.bps-write-max", 0);
413 throttle_cfg
->buckets
[THROTTLE_OPS_TOTAL
].max
=
414 qemu_opt_get_number(opts
, "throttling.iops-total-max", 0);
415 throttle_cfg
->buckets
[THROTTLE_OPS_READ
].max
=
416 qemu_opt_get_number(opts
, "throttling.iops-read-max", 0);
417 throttle_cfg
->buckets
[THROTTLE_OPS_WRITE
].max
=
418 qemu_opt_get_number(opts
, "throttling.iops-write-max", 0);
420 throttle_cfg
->buckets
[THROTTLE_BPS_TOTAL
].burst_length
=
421 qemu_opt_get_number(opts
, "throttling.bps-total-max-length", 1);
422 throttle_cfg
->buckets
[THROTTLE_BPS_READ
].burst_length
=
423 qemu_opt_get_number(opts
, "throttling.bps-read-max-length", 1);
424 throttle_cfg
->buckets
[THROTTLE_BPS_WRITE
].burst_length
=
425 qemu_opt_get_number(opts
, "throttling.bps-write-max-length", 1);
426 throttle_cfg
->buckets
[THROTTLE_OPS_TOTAL
].burst_length
=
427 qemu_opt_get_number(opts
, "throttling.iops-total-max-length", 1);
428 throttle_cfg
->buckets
[THROTTLE_OPS_READ
].burst_length
=
429 qemu_opt_get_number(opts
, "throttling.iops-read-max-length", 1);
430 throttle_cfg
->buckets
[THROTTLE_OPS_WRITE
].burst_length
=
431 qemu_opt_get_number(opts
, "throttling.iops-write-max-length", 1);
433 throttle_cfg
->op_size
=
434 qemu_opt_get_number(opts
, "throttling.iops-size", 0);
436 if (!throttle_is_valid(throttle_cfg
, errp
)) {
443 qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup
,
444 qemu_opt_get(opts
, "detect-zeroes"),
445 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF
,
448 error_propagate(errp
, local_error
);
454 /* Takes the ownership of bs_opts */
455 static BlockBackend
*blockdev_init(const char *file
, QDict
*bs_opts
,
460 int on_read_error
, on_write_error
;
461 bool account_invalid
, account_failed
;
462 bool writethrough
, read_only
;
464 BlockDriverState
*bs
;
469 QDict
*interval_dict
= NULL
;
470 QList
*interval_list
= NULL
;
472 BlockdevDetectZeroesOptions detect_zeroes
=
473 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF
;
474 const char *throttling_group
= NULL
;
476 /* Check common options by copying from bs_opts to opts, all other options
477 * stay in bs_opts for processing by bdrv_open(). */
478 id
= qdict_get_try_str(bs_opts
, "id");
479 opts
= qemu_opts_create(&qemu_common_drive_opts
, id
, 1, &error
);
481 error_propagate(errp
, error
);
485 qemu_opts_absorb_qdict(opts
, bs_opts
, &error
);
487 error_propagate(errp
, error
);
492 qdict_del(bs_opts
, "id");
495 /* extract parameters */
496 snapshot
= qemu_opt_get_bool(opts
, "snapshot", 0);
498 account_invalid
= qemu_opt_get_bool(opts
, "stats-account-invalid", true);
499 account_failed
= qemu_opt_get_bool(opts
, "stats-account-failed", true);
501 writethrough
= !qemu_opt_get_bool(opts
, BDRV_OPT_CACHE_WB
, true);
503 id
= qemu_opts_id(opts
);
505 qdict_extract_subqdict(bs_opts
, &interval_dict
, "stats-intervals.");
506 qdict_array_split(interval_dict
, &interval_list
);
508 if (qdict_size(interval_dict
) != 0) {
509 error_setg(errp
, "Invalid option stats-intervals.%s",
510 qdict_first(interval_dict
)->key
);
514 extract_common_blockdev_options(opts
, &bdrv_flags
, &throttling_group
, &cfg
,
515 &detect_zeroes
, &error
);
517 error_propagate(errp
, error
);
521 if ((buf
= qemu_opt_get(opts
, "format")) != NULL
) {
522 if (is_help_option(buf
)) {
523 qemu_printf("Supported formats:");
524 bdrv_iterate_format(bdrv_format_print
, NULL
, false);
525 qemu_printf("\nSupported formats (read-only):");
526 bdrv_iterate_format(bdrv_format_print
, NULL
, true);
531 if (qdict_haskey(bs_opts
, "driver")) {
532 error_setg(errp
, "Cannot specify both 'driver' and 'format'");
535 qdict_put_str(bs_opts
, "driver", buf
);
538 on_write_error
= BLOCKDEV_ON_ERROR_ENOSPC
;
539 if ((buf
= qemu_opt_get(opts
, "werror")) != NULL
) {
540 on_write_error
= parse_block_error_action(buf
, 0, &error
);
542 error_propagate(errp
, error
);
547 on_read_error
= BLOCKDEV_ON_ERROR_REPORT
;
548 if ((buf
= qemu_opt_get(opts
, "rerror")) != NULL
) {
549 on_read_error
= parse_block_error_action(buf
, 1, &error
);
551 error_propagate(errp
, error
);
557 bdrv_flags
|= BDRV_O_SNAPSHOT
;
560 read_only
= qemu_opt_get_bool(opts
, BDRV_OPT_READ_ONLY
, false);
563 if ((!file
|| !*file
) && !qdict_size(bs_opts
)) {
564 BlockBackendRootState
*blk_rs
;
566 blk
= blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL
);
567 blk_rs
= blk_get_root_state(blk
);
568 blk_rs
->open_flags
= bdrv_flags
;
569 blk_rs
->read_only
= read_only
;
570 blk_rs
->detect_zeroes
= detect_zeroes
;
572 qobject_unref(bs_opts
);
574 if (file
&& !*file
) {
578 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
579 * with other callers) rather than what we want as the real defaults.
580 * Apply the defaults here instead. */
581 qdict_set_default_str(bs_opts
, BDRV_OPT_CACHE_DIRECT
, "off");
582 qdict_set_default_str(bs_opts
, BDRV_OPT_CACHE_NO_FLUSH
, "off");
583 qdict_set_default_str(bs_opts
, BDRV_OPT_READ_ONLY
,
584 read_only
? "on" : "off");
585 qdict_set_default_str(bs_opts
, BDRV_OPT_AUTO_READ_ONLY
, "on");
586 assert((bdrv_flags
& BDRV_O_CACHE_MASK
) == 0);
588 if (runstate_check(RUN_STATE_INMIGRATE
)) {
589 bdrv_flags
|= BDRV_O_INACTIVE
;
592 blk
= blk_new_open(file
, NULL
, bs_opts
, bdrv_flags
, errp
);
598 bs
->detect_zeroes
= detect_zeroes
;
600 block_acct_setup(blk_get_stats(blk
), account_invalid
, account_failed
);
602 if (!parse_stats_intervals(blk_get_stats(blk
), interval_list
, errp
)) {
609 /* disk I/O throttling */
610 if (throttle_enabled(&cfg
)) {
611 if (!throttling_group
) {
612 throttling_group
= id
;
614 blk_io_limits_enable(blk
, throttling_group
);
615 blk_set_io_limits(blk
, &cfg
);
618 blk_set_enable_write_cache(blk
, !writethrough
);
619 blk_set_on_error(blk
, on_read_error
, on_write_error
);
621 if (!monitor_add_blk(blk
, id
, errp
)) {
629 qobject_unref(interval_dict
);
630 qobject_unref(interval_list
);
635 qobject_unref(interval_dict
);
636 qobject_unref(interval_list
);
638 qobject_unref(bs_opts
);
642 /* Takes the ownership of bs_opts */
643 static BlockDriverState
*bds_tree_init(QDict
*bs_opts
, Error
**errp
)
647 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
648 * with other callers) rather than what we want as the real defaults.
649 * Apply the defaults here instead. */
650 qdict_set_default_str(bs_opts
, BDRV_OPT_CACHE_DIRECT
, "off");
651 qdict_set_default_str(bs_opts
, BDRV_OPT_CACHE_NO_FLUSH
, "off");
652 qdict_set_default_str(bs_opts
, BDRV_OPT_READ_ONLY
, "off");
654 if (runstate_check(RUN_STATE_INMIGRATE
)) {
655 bdrv_flags
|= BDRV_O_INACTIVE
;
658 return bdrv_open(NULL
, NULL
, bs_opts
, bdrv_flags
, errp
);
661 void blockdev_close_all_bdrv_states(void)
663 BlockDriverState
*bs
, *next_bs
;
665 QTAILQ_FOREACH_SAFE(bs
, &monitor_bdrv_states
, monitor_list
, next_bs
) {
666 AioContext
*ctx
= bdrv_get_aio_context(bs
);
668 aio_context_acquire(ctx
);
670 aio_context_release(ctx
);
674 /* Iterates over the list of monitor-owned BlockDriverStates */
675 BlockDriverState
*bdrv_next_monitor_owned(BlockDriverState
*bs
)
677 return bs
? QTAILQ_NEXT(bs
, monitor_list
)
678 : QTAILQ_FIRST(&monitor_bdrv_states
);
681 static void qemu_opt_rename(QemuOpts
*opts
, const char *from
, const char *to
,
686 value
= qemu_opt_get(opts
, from
);
688 if (qemu_opt_find(opts
, to
)) {
689 error_setg(errp
, "'%s' and its alias '%s' can't be used at the "
690 "same time", to
, from
);
695 /* rename all items in opts */
696 while ((value
= qemu_opt_get(opts
, from
))) {
697 qemu_opt_set(opts
, to
, value
, &error_abort
);
698 qemu_opt_unset(opts
, from
);
702 QemuOptsList qemu_legacy_drive_opts
= {
704 .head
= QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts
.head
),
708 .type
= QEMU_OPT_NUMBER
,
709 .help
= "bus number",
712 .type
= QEMU_OPT_NUMBER
,
713 .help
= "unit number (i.e. lun for scsi)",
716 .type
= QEMU_OPT_NUMBER
,
717 .help
= "index number",
720 .type
= QEMU_OPT_STRING
,
721 .help
= "media type (disk, cdrom)",
724 .type
= QEMU_OPT_STRING
,
725 .help
= "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
728 .type
= QEMU_OPT_STRING
,
732 /* Options that are passed on, but have special semantics with -drive */
734 .name
= BDRV_OPT_READ_ONLY
,
735 .type
= QEMU_OPT_BOOL
,
736 .help
= "open drive file as read-only",
739 .type
= QEMU_OPT_STRING
,
740 .help
= "read error action",
743 .type
= QEMU_OPT_STRING
,
744 .help
= "write error action",
746 .name
= "copy-on-read",
747 .type
= QEMU_OPT_BOOL
,
748 .help
= "copy read data from backing file into image file",
751 { /* end of list */ }
755 DriveInfo
*drive_new(QemuOpts
*all_opts
, BlockInterfaceType block_default_type
,
760 DriveInfo
*dinfo
= NULL
;
762 QemuOpts
*legacy_opts
;
763 DriveMediaType media
= MEDIA_DISK
;
764 BlockInterfaceType type
;
765 int max_devs
, bus_id
, unit_id
, index
;
766 const char *werror
, *rerror
;
767 bool read_only
= false;
769 const char *filename
;
770 Error
*local_err
= NULL
;
773 /* Change legacy command line options into QMP ones */
774 static const struct {
778 { "iops", "throttling.iops-total" },
779 { "iops_rd", "throttling.iops-read" },
780 { "iops_wr", "throttling.iops-write" },
782 { "bps", "throttling.bps-total" },
783 { "bps_rd", "throttling.bps-read" },
784 { "bps_wr", "throttling.bps-write" },
786 { "iops_max", "throttling.iops-total-max" },
787 { "iops_rd_max", "throttling.iops-read-max" },
788 { "iops_wr_max", "throttling.iops-write-max" },
790 { "bps_max", "throttling.bps-total-max" },
791 { "bps_rd_max", "throttling.bps-read-max" },
792 { "bps_wr_max", "throttling.bps-write-max" },
794 { "iops_size", "throttling.iops-size" },
796 { "group", "throttling.group" },
798 { "readonly", BDRV_OPT_READ_ONLY
},
801 for (i
= 0; i
< ARRAY_SIZE(opt_renames
); i
++) {
802 qemu_opt_rename(all_opts
, opt_renames
[i
].from
, opt_renames
[i
].to
,
805 error_propagate(errp
, local_err
);
810 value
= qemu_opt_get(all_opts
, "cache");
815 if (bdrv_parse_cache_mode(value
, &flags
, &writethrough
) != 0) {
816 error_setg(errp
, "invalid cache option");
820 /* Specific options take precedence */
821 if (!qemu_opt_get(all_opts
, BDRV_OPT_CACHE_WB
)) {
822 qemu_opt_set_bool(all_opts
, BDRV_OPT_CACHE_WB
,
823 !writethrough
, &error_abort
);
825 if (!qemu_opt_get(all_opts
, BDRV_OPT_CACHE_DIRECT
)) {
826 qemu_opt_set_bool(all_opts
, BDRV_OPT_CACHE_DIRECT
,
827 !!(flags
& BDRV_O_NOCACHE
), &error_abort
);
829 if (!qemu_opt_get(all_opts
, BDRV_OPT_CACHE_NO_FLUSH
)) {
830 qemu_opt_set_bool(all_opts
, BDRV_OPT_CACHE_NO_FLUSH
,
831 !!(flags
& BDRV_O_NO_FLUSH
), &error_abort
);
833 qemu_opt_unset(all_opts
, "cache");
836 /* Get a QDict for processing the options */
837 bs_opts
= qdict_new();
838 qemu_opts_to_qdict(all_opts
, bs_opts
);
840 legacy_opts
= qemu_opts_create(&qemu_legacy_drive_opts
, NULL
, 0,
842 qemu_opts_absorb_qdict(legacy_opts
, bs_opts
, &local_err
);
844 error_propagate(errp
, local_err
);
849 value
= qemu_opt_get(legacy_opts
, "media");
851 if (!strcmp(value
, "disk")) {
853 } else if (!strcmp(value
, "cdrom")) {
857 error_setg(errp
, "'%s' invalid media", value
);
862 /* copy-on-read is disabled with a warning for read-only devices */
863 read_only
|= qemu_opt_get_bool(legacy_opts
, BDRV_OPT_READ_ONLY
, false);
864 copy_on_read
= qemu_opt_get_bool(legacy_opts
, "copy-on-read", false);
866 if (read_only
&& copy_on_read
) {
867 warn_report("disabling copy-on-read on read-only drive");
868 copy_on_read
= false;
871 qdict_put_str(bs_opts
, BDRV_OPT_READ_ONLY
, read_only
? "on" : "off");
872 qdict_put_str(bs_opts
, "copy-on-read", copy_on_read
? "on" : "off");
874 /* Controller type */
875 value
= qemu_opt_get(legacy_opts
, "if");
878 type
< IF_COUNT
&& strcmp(value
, if_name
[type
]);
881 if (type
== IF_COUNT
) {
882 error_setg(errp
, "unsupported bus type '%s'", value
);
886 type
= block_default_type
;
889 /* Device address specified by bus/unit or index.
890 * If none was specified, try to find the first free one. */
891 bus_id
= qemu_opt_get_number(legacy_opts
, "bus", 0);
892 unit_id
= qemu_opt_get_number(legacy_opts
, "unit", -1);
893 index
= qemu_opt_get_number(legacy_opts
, "index", -1);
895 max_devs
= if_max_devs
[type
];
898 if (bus_id
!= 0 || unit_id
!= -1) {
899 error_setg(errp
, "index cannot be used with bus and unit");
902 bus_id
= drive_index_to_bus_id(type
, index
);
903 unit_id
= drive_index_to_unit_id(type
, index
);
908 while (drive_get(type
, bus_id
, unit_id
) != NULL
) {
910 if (max_devs
&& unit_id
>= max_devs
) {
917 if (max_devs
&& unit_id
>= max_devs
) {
918 error_setg(errp
, "unit %d too big (max is %d)", unit_id
, max_devs
- 1);
922 if (drive_get(type
, bus_id
, unit_id
) != NULL
) {
923 error_setg(errp
, "drive with bus=%d, unit=%d (index=%d) exists",
924 bus_id
, unit_id
, index
);
928 /* no id supplied -> create one */
929 if (qemu_opts_id(all_opts
) == NULL
) {
931 const char *mediastr
= "";
932 if (type
== IF_IDE
|| type
== IF_SCSI
) {
933 mediastr
= (media
== MEDIA_CDROM
) ? "-cd" : "-hd";
936 new_id
= g_strdup_printf("%s%i%s%i", if_name
[type
], bus_id
,
939 new_id
= g_strdup_printf("%s%s%i", if_name
[type
],
942 qdict_put_str(bs_opts
, "id", new_id
);
946 /* Add virtio block device */
947 if (type
== IF_VIRTIO
) {
949 devopts
= qemu_opts_create(qemu_find_opts("device"), NULL
, 0,
951 if (arch_type
== QEMU_ARCH_S390X
) {
952 qemu_opt_set(devopts
, "driver", "virtio-blk-ccw", &error_abort
);
954 qemu_opt_set(devopts
, "driver", "virtio-blk-pci", &error_abort
);
956 qemu_opt_set(devopts
, "drive", qdict_get_str(bs_opts
, "id"),
960 filename
= qemu_opt_get(legacy_opts
, "file");
962 /* Check werror/rerror compatibility with if=... */
963 werror
= qemu_opt_get(legacy_opts
, "werror");
964 if (werror
!= NULL
) {
965 if (type
!= IF_IDE
&& type
!= IF_SCSI
&& type
!= IF_VIRTIO
&&
967 error_setg(errp
, "werror is not supported by this bus type");
970 qdict_put_str(bs_opts
, "werror", werror
);
973 rerror
= qemu_opt_get(legacy_opts
, "rerror");
974 if (rerror
!= NULL
) {
975 if (type
!= IF_IDE
&& type
!= IF_VIRTIO
&& type
!= IF_SCSI
&&
977 error_setg(errp
, "rerror is not supported by this bus type");
980 qdict_put_str(bs_opts
, "rerror", rerror
);
983 /* Actual block device init: Functionality shared with blockdev-add */
984 blk
= blockdev_init(filename
, bs_opts
, &local_err
);
987 error_propagate(errp
, local_err
);
993 /* Create legacy DriveInfo */
994 dinfo
= g_malloc0(sizeof(*dinfo
));
995 dinfo
->opts
= all_opts
;
999 dinfo
->unit
= unit_id
;
1001 blk_set_legacy_dinfo(blk
, dinfo
);
1008 dinfo
->media_cd
= media
== MEDIA_CDROM
;
1015 qemu_opts_del(legacy_opts
);
1016 qobject_unref(bs_opts
);
1020 static BlockDriverState
*qmp_get_root_bs(const char *name
, Error
**errp
)
1022 BlockDriverState
*bs
;
1024 bs
= bdrv_lookup_bs(name
, name
, errp
);
1029 if (!bdrv_is_root_node(bs
)) {
1030 error_setg(errp
, "Need a root block node");
1034 if (!bdrv_is_inserted(bs
)) {
1035 error_setg(errp
, "Device has no medium");
1042 static void blockdev_do_action(TransactionAction
*action
, Error
**errp
)
1044 TransactionActionList list
;
1046 list
.value
= action
;
1048 qmp_transaction(&list
, false, NULL
, errp
);
1051 void qmp_blockdev_snapshot_sync(bool has_device
, const char *device
,
1052 bool has_node_name
, const char *node_name
,
1053 const char *snapshot_file
,
1054 bool has_snapshot_node_name
,
1055 const char *snapshot_node_name
,
1056 bool has_format
, const char *format
,
1057 bool has_mode
, NewImageMode mode
, Error
**errp
)
1059 BlockdevSnapshotSync snapshot
= {
1060 .has_device
= has_device
,
1061 .device
= (char *) device
,
1062 .has_node_name
= has_node_name
,
1063 .node_name
= (char *) node_name
,
1064 .snapshot_file
= (char *) snapshot_file
,
1065 .has_snapshot_node_name
= has_snapshot_node_name
,
1066 .snapshot_node_name
= (char *) snapshot_node_name
,
1067 .has_format
= has_format
,
1068 .format
= (char *) format
,
1069 .has_mode
= has_mode
,
1072 TransactionAction action
= {
1073 .type
= TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
,
1074 .u
.blockdev_snapshot_sync
.data
= &snapshot
,
1076 blockdev_do_action(&action
, errp
);
1079 void qmp_blockdev_snapshot(const char *node
, const char *overlay
,
1082 BlockdevSnapshot snapshot_data
= {
1083 .node
= (char *) node
,
1084 .overlay
= (char *) overlay
1086 TransactionAction action
= {
1087 .type
= TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT
,
1088 .u
.blockdev_snapshot
.data
= &snapshot_data
,
1090 blockdev_do_action(&action
, errp
);
1093 void qmp_blockdev_snapshot_internal_sync(const char *device
,
1097 BlockdevSnapshotInternal snapshot
= {
1098 .device
= (char *) device
,
1099 .name
= (char *) name
1101 TransactionAction action
= {
1102 .type
= TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
,
1103 .u
.blockdev_snapshot_internal_sync
.data
= &snapshot
,
1105 blockdev_do_action(&action
, errp
);
1108 SnapshotInfo
*qmp_blockdev_snapshot_delete_internal_sync(const char *device
,
1115 BlockDriverState
*bs
;
1116 AioContext
*aio_context
;
1117 QEMUSnapshotInfo sn
;
1118 Error
*local_err
= NULL
;
1119 SnapshotInfo
*info
= NULL
;
1122 bs
= qmp_get_root_bs(device
, errp
);
1126 aio_context
= bdrv_get_aio_context(bs
);
1127 aio_context_acquire(aio_context
);
1138 error_setg(errp
, "Name or id must be provided");
1139 goto out_aio_context
;
1142 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE
, errp
)) {
1143 goto out_aio_context
;
1146 ret
= bdrv_snapshot_find_by_id_and_name(bs
, id
, name
, &sn
, &local_err
);
1148 error_propagate(errp
, local_err
);
1149 goto out_aio_context
;
1153 "Snapshot with id '%s' and name '%s' does not exist on "
1155 STR_OR_NULL(id
), STR_OR_NULL(name
), device
);
1156 goto out_aio_context
;
1159 bdrv_snapshot_delete(bs
, id
, name
, &local_err
);
1161 error_propagate(errp
, local_err
);
1162 goto out_aio_context
;
1165 aio_context_release(aio_context
);
1167 info
= g_new0(SnapshotInfo
, 1);
1168 info
->id
= g_strdup(sn
.id_str
);
1169 info
->name
= g_strdup(sn
.name
);
1170 info
->date_nsec
= sn
.date_nsec
;
1171 info
->date_sec
= sn
.date_sec
;
1172 info
->vm_state_size
= sn
.vm_state_size
;
1173 info
->vm_clock_nsec
= sn
.vm_clock_nsec
% 1000000000;
1174 info
->vm_clock_sec
= sn
.vm_clock_nsec
/ 1000000000;
1179 aio_context_release(aio_context
);
1184 * block_dirty_bitmap_lookup:
1185 * Return a dirty bitmap (if present), after validating
1186 * the node reference and bitmap names.
1188 * @node: The name of the BDS node to search for bitmaps
1189 * @name: The name of the bitmap to search for
1190 * @pbs: Output pointer for BDS lookup, if desired. Can be NULL.
1191 * @errp: Output pointer for error information. Can be NULL.
1193 * @return: A bitmap object on success, or NULL on failure.
1195 static BdrvDirtyBitmap
*block_dirty_bitmap_lookup(const char *node
,
1197 BlockDriverState
**pbs
,
1200 BlockDriverState
*bs
;
1201 BdrvDirtyBitmap
*bitmap
;
1204 error_setg(errp
, "Node cannot be NULL");
1208 error_setg(errp
, "Bitmap name cannot be NULL");
1211 bs
= bdrv_lookup_bs(node
, node
, NULL
);
1213 error_setg(errp
, "Node '%s' not found", node
);
1217 bitmap
= bdrv_find_dirty_bitmap(bs
, name
);
1219 error_setg(errp
, "Dirty bitmap '%s' not found", name
);
1230 /* New and old BlockDriverState structs for atomic group operations */
1232 typedef struct BlkActionState BlkActionState
;
1236 * Table of operations that define an Action.
1238 * @instance_size: Size of state struct, in bytes.
1239 * @prepare: Prepare the work, must NOT be NULL.
1240 * @commit: Commit the changes, can be NULL.
1241 * @abort: Abort the changes on fail, can be NULL.
1242 * @clean: Clean up resources after all transaction actions have called
1243 * commit() or abort(). Can be NULL.
1245 * Only prepare() may fail. In a single transaction, only one of commit() or
1246 * abort() will be called. clean() will always be called if it is present.
1248 typedef struct BlkActionOps
{
1249 size_t instance_size
;
1250 void (*prepare
)(BlkActionState
*common
, Error
**errp
);
1251 void (*commit
)(BlkActionState
*common
);
1252 void (*abort
)(BlkActionState
*common
);
1253 void (*clean
)(BlkActionState
*common
);
1258 * Describes one Action's state within a Transaction.
1260 * @action: QAPI-defined enum identifying which Action to perform.
1261 * @ops: Table of ActionOps this Action can perform.
1262 * @block_job_txn: Transaction which this action belongs to.
1263 * @entry: List membership for all Actions in this Transaction.
1265 * This structure must be arranged as first member in a subclassed type,
1266 * assuming that the compiler will also arrange it to the same offsets as the
1269 struct BlkActionState
{
1270 TransactionAction
*action
;
1271 const BlkActionOps
*ops
;
1272 JobTxn
*block_job_txn
;
1273 TransactionProperties
*txn_props
;
1274 QTAILQ_ENTRY(BlkActionState
) entry
;
1277 /* internal snapshot private data */
1278 typedef struct InternalSnapshotState
{
1279 BlkActionState common
;
1280 BlockDriverState
*bs
;
1281 QEMUSnapshotInfo sn
;
1283 } InternalSnapshotState
;
1286 static int action_check_completion_mode(BlkActionState
*s
, Error
**errp
)
1288 if (s
->txn_props
->completion_mode
!= ACTION_COMPLETION_MODE_INDIVIDUAL
) {
1290 "Action '%s' does not support Transaction property "
1291 "completion-mode = %s",
1292 TransactionActionKind_str(s
->action
->type
),
1293 ActionCompletionMode_str(s
->txn_props
->completion_mode
));
1299 static void internal_snapshot_prepare(BlkActionState
*common
,
1302 Error
*local_err
= NULL
;
1305 BlockDriverState
*bs
;
1306 QEMUSnapshotInfo old_sn
, *sn
;
1309 BlockdevSnapshotInternal
*internal
;
1310 InternalSnapshotState
*state
;
1311 AioContext
*aio_context
;
1314 g_assert(common
->action
->type
==
1315 TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
);
1316 internal
= common
->action
->u
.blockdev_snapshot_internal_sync
.data
;
1317 state
= DO_UPCAST(InternalSnapshotState
, common
, common
);
1319 /* 1. parse input */
1320 device
= internal
->device
;
1321 name
= internal
->name
;
1323 /* 2. check for validation */
1324 if (action_check_completion_mode(common
, errp
) < 0) {
1328 bs
= qmp_get_root_bs(device
, errp
);
1333 aio_context
= bdrv_get_aio_context(bs
);
1334 aio_context_acquire(aio_context
);
1338 /* Paired with .clean() */
1339 bdrv_drained_begin(bs
);
1341 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT
, errp
)) {
1345 if (bdrv_is_read_only(bs
)) {
1346 error_setg(errp
, "Device '%s' is read only", device
);
1350 if (!bdrv_can_snapshot(bs
)) {
1351 error_setg(errp
, "Block format '%s' used by device '%s' "
1352 "does not support internal snapshots",
1353 bs
->drv
->format_name
, device
);
1357 if (!strlen(name
)) {
1358 error_setg(errp
, "Name is empty");
1362 /* check whether a snapshot with name exist */
1363 ret
= bdrv_snapshot_find_by_id_and_name(bs
, NULL
, name
, &old_sn
,
1366 error_propagate(errp
, local_err
);
1370 "Snapshot with name '%s' already exists on device '%s'",
1375 /* 3. take the snapshot */
1377 pstrcpy(sn
->name
, sizeof(sn
->name
), name
);
1378 qemu_gettimeofday(&tv
);
1379 sn
->date_sec
= tv
.tv_sec
;
1380 sn
->date_nsec
= tv
.tv_usec
* 1000;
1381 sn
->vm_clock_nsec
= qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
);
1383 ret1
= bdrv_snapshot_create(bs
, sn
);
1385 error_setg_errno(errp
, -ret1
,
1386 "Failed to create snapshot '%s' on device '%s'",
1391 /* 4. succeed, mark a snapshot is created */
1392 state
->created
= true;
1395 aio_context_release(aio_context
);
1398 static void internal_snapshot_abort(BlkActionState
*common
)
1400 InternalSnapshotState
*state
=
1401 DO_UPCAST(InternalSnapshotState
, common
, common
);
1402 BlockDriverState
*bs
= state
->bs
;
1403 QEMUSnapshotInfo
*sn
= &state
->sn
;
1404 AioContext
*aio_context
;
1405 Error
*local_error
= NULL
;
1407 if (!state
->created
) {
1411 aio_context
= bdrv_get_aio_context(state
->bs
);
1412 aio_context_acquire(aio_context
);
1414 if (bdrv_snapshot_delete(bs
, sn
->id_str
, sn
->name
, &local_error
) < 0) {
1415 error_reportf_err(local_error
,
1416 "Failed to delete snapshot with id '%s' and "
1417 "name '%s' on device '%s' in abort: ",
1418 sn
->id_str
, sn
->name
,
1419 bdrv_get_device_name(bs
));
1422 aio_context_release(aio_context
);
1425 static void internal_snapshot_clean(BlkActionState
*common
)
1427 InternalSnapshotState
*state
= DO_UPCAST(InternalSnapshotState
,
1429 AioContext
*aio_context
;
1435 aio_context
= bdrv_get_aio_context(state
->bs
);
1436 aio_context_acquire(aio_context
);
1438 bdrv_drained_end(state
->bs
);
1440 aio_context_release(aio_context
);
1443 /* external snapshot private data */
1444 typedef struct ExternalSnapshotState
{
1445 BlkActionState common
;
1446 BlockDriverState
*old_bs
;
1447 BlockDriverState
*new_bs
;
1448 bool overlay_appended
;
1449 } ExternalSnapshotState
;
1451 static void external_snapshot_prepare(BlkActionState
*common
,
1455 QDict
*options
= NULL
;
1456 Error
*local_err
= NULL
;
1457 /* Device and node name of the image to generate the snapshot from */
1459 const char *node_name
;
1460 /* Reference to the new image (for 'blockdev-snapshot') */
1461 const char *snapshot_ref
;
1462 /* File name of the new image (for 'blockdev-snapshot-sync') */
1463 const char *new_image_file
;
1464 ExternalSnapshotState
*state
=
1465 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1466 TransactionAction
*action
= common
->action
;
1467 AioContext
*aio_context
;
1468 AioContext
*old_context
;
1471 /* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar
1472 * purpose but a different set of parameters */
1473 switch (action
->type
) {
1474 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT
:
1476 BlockdevSnapshot
*s
= action
->u
.blockdev_snapshot
.data
;
1478 node_name
= s
->node
;
1479 new_image_file
= NULL
;
1480 snapshot_ref
= s
->overlay
;
1483 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
:
1485 BlockdevSnapshotSync
*s
= action
->u
.blockdev_snapshot_sync
.data
;
1486 device
= s
->has_device
? s
->device
: NULL
;
1487 node_name
= s
->has_node_name
? s
->node_name
: NULL
;
1488 new_image_file
= s
->snapshot_file
;
1489 snapshot_ref
= NULL
;
1493 g_assert_not_reached();
1496 /* start processing */
1497 if (action_check_completion_mode(common
, errp
) < 0) {
1501 state
->old_bs
= bdrv_lookup_bs(device
, node_name
, errp
);
1502 if (!state
->old_bs
) {
1506 aio_context
= bdrv_get_aio_context(state
->old_bs
);
1507 aio_context_acquire(aio_context
);
1509 /* Paired with .clean() */
1510 bdrv_drained_begin(state
->old_bs
);
1512 if (!bdrv_is_inserted(state
->old_bs
)) {
1513 error_setg(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
1517 if (bdrv_op_is_blocked(state
->old_bs
,
1518 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT
, errp
)) {
1522 if (!bdrv_is_read_only(state
->old_bs
)) {
1523 if (bdrv_flush(state
->old_bs
)) {
1524 error_setg(errp
, QERR_IO_ERROR
);
1529 if (action
->type
== TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
) {
1530 BlockdevSnapshotSync
*s
= action
->u
.blockdev_snapshot_sync
.data
;
1531 const char *format
= s
->has_format
? s
->format
: "qcow2";
1532 enum NewImageMode mode
;
1533 const char *snapshot_node_name
=
1534 s
->has_snapshot_node_name
? s
->snapshot_node_name
: NULL
;
1536 if (node_name
&& !snapshot_node_name
) {
1537 error_setg(errp
, "New overlay node name missing");
1541 if (snapshot_node_name
&&
1542 bdrv_lookup_bs(snapshot_node_name
, snapshot_node_name
, NULL
)) {
1543 error_setg(errp
, "New overlay node name already in use");
1547 flags
= state
->old_bs
->open_flags
;
1548 flags
&= ~(BDRV_O_SNAPSHOT
| BDRV_O_COPY_ON_READ
);
1549 flags
|= BDRV_O_NO_BACKING
;
1551 /* create new image w/backing file */
1552 mode
= s
->has_mode
? s
->mode
: NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
1553 if (mode
!= NEW_IMAGE_MODE_EXISTING
) {
1554 int64_t size
= bdrv_getlength(state
->old_bs
);
1556 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
1559 bdrv_refresh_filename(state
->old_bs
);
1560 bdrv_img_create(new_image_file
, format
,
1561 state
->old_bs
->filename
,
1562 state
->old_bs
->drv
->format_name
,
1563 NULL
, size
, flags
, false, &local_err
);
1565 error_propagate(errp
, local_err
);
1570 options
= qdict_new();
1571 if (snapshot_node_name
) {
1572 qdict_put_str(options
, "node-name", snapshot_node_name
);
1574 qdict_put_str(options
, "driver", format
);
1577 state
->new_bs
= bdrv_open(new_image_file
, snapshot_ref
, options
, flags
,
1579 /* We will manually add the backing_hd field to the bs later */
1580 if (!state
->new_bs
) {
1584 if (bdrv_has_blk(state
->new_bs
)) {
1585 error_setg(errp
, "The overlay is already in use");
1589 if (bdrv_op_is_blocked(state
->new_bs
, BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT
,
1594 if (state
->new_bs
->backing
!= NULL
) {
1595 error_setg(errp
, "The overlay already has a backing image");
1599 if (!state
->new_bs
->drv
->supports_backing
) {
1600 error_setg(errp
, "The overlay does not support backing images");
1604 /* Honor bdrv_try_set_aio_context() context acquisition requirements. */
1605 old_context
= bdrv_get_aio_context(state
->new_bs
);
1606 aio_context_release(aio_context
);
1607 aio_context_acquire(old_context
);
1609 ret
= bdrv_try_set_aio_context(state
->new_bs
, aio_context
, errp
);
1611 aio_context_release(old_context
);
1612 aio_context_acquire(aio_context
);
1618 /* This removes our old bs and adds the new bs. This is an operation that
1619 * can fail, so we need to do it in .prepare; undoing it for abort is
1620 * always possible. */
1621 bdrv_ref(state
->new_bs
);
1622 bdrv_append(state
->new_bs
, state
->old_bs
, &local_err
);
1624 error_propagate(errp
, local_err
);
1627 state
->overlay_appended
= true;
1630 aio_context_release(aio_context
);
1633 static void external_snapshot_commit(BlkActionState
*common
)
1635 ExternalSnapshotState
*state
=
1636 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1637 AioContext
*aio_context
;
1639 aio_context
= bdrv_get_aio_context(state
->old_bs
);
1640 aio_context_acquire(aio_context
);
1642 /* We don't need (or want) to use the transactional
1643 * bdrv_reopen_multiple() across all the entries at once, because we
1644 * don't want to abort all of them if one of them fails the reopen */
1645 if (!atomic_read(&state
->old_bs
->copy_on_read
)) {
1646 bdrv_reopen_set_read_only(state
->old_bs
, true, NULL
);
1649 aio_context_release(aio_context
);
1652 static void external_snapshot_abort(BlkActionState
*common
)
1654 ExternalSnapshotState
*state
=
1655 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1656 if (state
->new_bs
) {
1657 if (state
->overlay_appended
) {
1658 AioContext
*aio_context
;
1659 AioContext
*tmp_context
;
1662 aio_context
= bdrv_get_aio_context(state
->old_bs
);
1663 aio_context_acquire(aio_context
);
1665 bdrv_ref(state
->old_bs
); /* we can't let bdrv_set_backind_hd()
1666 close state->old_bs; we need it */
1667 bdrv_set_backing_hd(state
->new_bs
, NULL
, &error_abort
);
1670 * The call to bdrv_set_backing_hd() above returns state->old_bs to
1671 * the main AioContext. As we're still going to be using it, return
1672 * it to the AioContext it was before.
1674 tmp_context
= bdrv_get_aio_context(state
->old_bs
);
1675 if (aio_context
!= tmp_context
) {
1676 aio_context_release(aio_context
);
1677 aio_context_acquire(tmp_context
);
1679 ret
= bdrv_try_set_aio_context(state
->old_bs
,
1683 aio_context_release(tmp_context
);
1684 aio_context_acquire(aio_context
);
1687 bdrv_replace_node(state
->new_bs
, state
->old_bs
, &error_abort
);
1688 bdrv_unref(state
->old_bs
); /* bdrv_replace_node() ref'ed old_bs */
1690 aio_context_release(aio_context
);
1695 static void external_snapshot_clean(BlkActionState
*common
)
1697 ExternalSnapshotState
*state
=
1698 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1699 AioContext
*aio_context
;
1701 if (!state
->old_bs
) {
1705 aio_context
= bdrv_get_aio_context(state
->old_bs
);
1706 aio_context_acquire(aio_context
);
1708 bdrv_drained_end(state
->old_bs
);
1709 bdrv_unref(state
->new_bs
);
1711 aio_context_release(aio_context
);
1714 typedef struct DriveBackupState
{
1715 BlkActionState common
;
1716 BlockDriverState
*bs
;
1720 static BlockJob
*do_backup_common(BackupCommon
*backup
,
1721 BlockDriverState
*bs
,
1722 BlockDriverState
*target_bs
,
1723 AioContext
*aio_context
,
1724 JobTxn
*txn
, Error
**errp
);
1726 static void drive_backup_prepare(BlkActionState
*common
, Error
**errp
)
1728 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1729 DriveBackup
*backup
;
1730 BlockDriverState
*bs
;
1731 BlockDriverState
*target_bs
;
1732 BlockDriverState
*source
= NULL
;
1733 AioContext
*aio_context
;
1734 AioContext
*old_context
;
1736 Error
*local_err
= NULL
;
1739 bool set_backing_hd
= false;
1742 assert(common
->action
->type
== TRANSACTION_ACTION_KIND_DRIVE_BACKUP
);
1743 backup
= common
->action
->u
.drive_backup
.data
;
1745 if (!backup
->has_mode
) {
1746 backup
->mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
1749 bs
= bdrv_lookup_bs(backup
->device
, backup
->device
, errp
);
1755 error_setg(errp
, "Device has no medium");
1759 aio_context
= bdrv_get_aio_context(bs
);
1760 aio_context_acquire(aio_context
);
1762 /* Paired with .clean() */
1763 bdrv_drained_begin(bs
);
1765 if (!backup
->has_format
) {
1766 backup
->format
= backup
->mode
== NEW_IMAGE_MODE_EXISTING
?
1767 NULL
: (char *) bs
->drv
->format_name
;
1770 /* Early check to avoid creating target */
1771 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_BACKUP_SOURCE
, errp
)) {
1775 flags
= bs
->open_flags
| BDRV_O_RDWR
;
1778 * See if we have a backing HD we can use to create our new image
1781 if (backup
->sync
== MIRROR_SYNC_MODE_TOP
) {
1782 source
= backing_bs(bs
);
1784 backup
->sync
= MIRROR_SYNC_MODE_FULL
;
1787 if (backup
->sync
== MIRROR_SYNC_MODE_NONE
) {
1789 flags
|= BDRV_O_NO_BACKING
;
1790 set_backing_hd
= true;
1793 size
= bdrv_getlength(bs
);
1795 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
1799 if (backup
->mode
!= NEW_IMAGE_MODE_EXISTING
) {
1800 assert(backup
->format
);
1802 bdrv_refresh_filename(source
);
1803 bdrv_img_create(backup
->target
, backup
->format
, source
->filename
,
1804 source
->drv
->format_name
, NULL
,
1805 size
, flags
, false, &local_err
);
1807 bdrv_img_create(backup
->target
, backup
->format
, NULL
, NULL
, NULL
,
1808 size
, flags
, false, &local_err
);
1813 error_propagate(errp
, local_err
);
1817 options
= qdict_new();
1818 qdict_put_str(options
, "discard", "unmap");
1819 qdict_put_str(options
, "detect-zeroes", "unmap");
1820 if (backup
->format
) {
1821 qdict_put_str(options
, "driver", backup
->format
);
1824 target_bs
= bdrv_open(backup
->target
, NULL
, options
, flags
, errp
);
1829 /* Honor bdrv_try_set_aio_context() context acquisition requirements. */
1830 old_context
= bdrv_get_aio_context(target_bs
);
1831 aio_context_release(aio_context
);
1832 aio_context_acquire(old_context
);
1834 ret
= bdrv_try_set_aio_context(target_bs
, aio_context
, errp
);
1836 bdrv_unref(target_bs
);
1837 aio_context_release(old_context
);
1841 aio_context_release(old_context
);
1842 aio_context_acquire(aio_context
);
1844 if (set_backing_hd
) {
1845 bdrv_set_backing_hd(target_bs
, source
, &local_err
);
1853 state
->job
= do_backup_common(qapi_DriveBackup_base(backup
),
1854 bs
, target_bs
, aio_context
,
1855 common
->block_job_txn
, errp
);
1858 bdrv_unref(target_bs
);
1860 aio_context_release(aio_context
);
1863 static void drive_backup_commit(BlkActionState
*common
)
1865 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1866 AioContext
*aio_context
;
1868 aio_context
= bdrv_get_aio_context(state
->bs
);
1869 aio_context_acquire(aio_context
);
1872 job_start(&state
->job
->job
);
1874 aio_context_release(aio_context
);
1877 static void drive_backup_abort(BlkActionState
*common
)
1879 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1882 AioContext
*aio_context
;
1884 aio_context
= bdrv_get_aio_context(state
->bs
);
1885 aio_context_acquire(aio_context
);
1887 job_cancel_sync(&state
->job
->job
);
1889 aio_context_release(aio_context
);
1893 static void drive_backup_clean(BlkActionState
*common
)
1895 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1896 AioContext
*aio_context
;
1902 aio_context
= bdrv_get_aio_context(state
->bs
);
1903 aio_context_acquire(aio_context
);
1905 bdrv_drained_end(state
->bs
);
1907 aio_context_release(aio_context
);
1910 typedef struct BlockdevBackupState
{
1911 BlkActionState common
;
1912 BlockDriverState
*bs
;
1914 } BlockdevBackupState
;
1916 static void blockdev_backup_prepare(BlkActionState
*common
, Error
**errp
)
1918 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
1919 BlockdevBackup
*backup
;
1920 BlockDriverState
*bs
;
1921 BlockDriverState
*target_bs
;
1922 AioContext
*aio_context
;
1923 AioContext
*old_context
;
1926 assert(common
->action
->type
== TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP
);
1927 backup
= common
->action
->u
.blockdev_backup
.data
;
1929 bs
= bdrv_lookup_bs(backup
->device
, backup
->device
, errp
);
1934 target_bs
= bdrv_lookup_bs(backup
->target
, backup
->target
, errp
);
1939 /* Honor bdrv_try_set_aio_context() context acquisition requirements. */
1940 aio_context
= bdrv_get_aio_context(bs
);
1941 old_context
= bdrv_get_aio_context(target_bs
);
1942 aio_context_acquire(old_context
);
1944 ret
= bdrv_try_set_aio_context(target_bs
, aio_context
, errp
);
1946 aio_context_release(old_context
);
1950 aio_context_release(old_context
);
1951 aio_context_acquire(aio_context
);
1954 /* Paired with .clean() */
1955 bdrv_drained_begin(state
->bs
);
1957 state
->job
= do_backup_common(qapi_BlockdevBackup_base(backup
),
1958 bs
, target_bs
, aio_context
,
1959 common
->block_job_txn
, errp
);
1961 aio_context_release(aio_context
);
1964 static void blockdev_backup_commit(BlkActionState
*common
)
1966 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
1967 AioContext
*aio_context
;
1969 aio_context
= bdrv_get_aio_context(state
->bs
);
1970 aio_context_acquire(aio_context
);
1973 job_start(&state
->job
->job
);
1975 aio_context_release(aio_context
);
1978 static void blockdev_backup_abort(BlkActionState
*common
)
1980 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
1983 AioContext
*aio_context
;
1985 aio_context
= bdrv_get_aio_context(state
->bs
);
1986 aio_context_acquire(aio_context
);
1988 job_cancel_sync(&state
->job
->job
);
1990 aio_context_release(aio_context
);
1994 static void blockdev_backup_clean(BlkActionState
*common
)
1996 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
1997 AioContext
*aio_context
;
2003 aio_context
= bdrv_get_aio_context(state
->bs
);
2004 aio_context_acquire(aio_context
);
2006 bdrv_drained_end(state
->bs
);
2008 aio_context_release(aio_context
);
2011 typedef struct BlockDirtyBitmapState
{
2012 BlkActionState common
;
2013 BdrvDirtyBitmap
*bitmap
;
2014 BlockDriverState
*bs
;
2018 } BlockDirtyBitmapState
;
2020 static void block_dirty_bitmap_add_prepare(BlkActionState
*common
,
2023 Error
*local_err
= NULL
;
2024 BlockDirtyBitmapAdd
*action
;
2025 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2028 if (action_check_completion_mode(common
, errp
) < 0) {
2032 action
= common
->action
->u
.block_dirty_bitmap_add
.data
;
2033 /* AIO context taken and released within qmp_block_dirty_bitmap_add */
2034 qmp_block_dirty_bitmap_add(action
->node
, action
->name
,
2035 action
->has_granularity
, action
->granularity
,
2036 action
->has_persistent
, action
->persistent
,
2037 action
->has_disabled
, action
->disabled
,
2041 state
->prepared
= true;
2043 error_propagate(errp
, local_err
);
2047 static void block_dirty_bitmap_add_abort(BlkActionState
*common
)
2049 BlockDirtyBitmapAdd
*action
;
2050 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2053 action
= common
->action
->u
.block_dirty_bitmap_add
.data
;
2054 /* Should not be able to fail: IF the bitmap was added via .prepare(),
2055 * then the node reference and bitmap name must have been valid.
2057 if (state
->prepared
) {
2058 qmp_block_dirty_bitmap_remove(action
->node
, action
->name
, &error_abort
);
2062 static void block_dirty_bitmap_clear_prepare(BlkActionState
*common
,
2065 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2067 BlockDirtyBitmap
*action
;
2069 if (action_check_completion_mode(common
, errp
) < 0) {
2073 action
= common
->action
->u
.block_dirty_bitmap_clear
.data
;
2074 state
->bitmap
= block_dirty_bitmap_lookup(action
->node
,
2078 if (!state
->bitmap
) {
2082 if (bdrv_dirty_bitmap_check(state
->bitmap
, BDRV_BITMAP_DEFAULT
, errp
)) {
2086 bdrv_clear_dirty_bitmap(state
->bitmap
, &state
->backup
);
2089 static void block_dirty_bitmap_restore(BlkActionState
*common
)
2091 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2094 if (state
->backup
) {
2095 bdrv_restore_dirty_bitmap(state
->bitmap
, state
->backup
);
2099 static void block_dirty_bitmap_free_backup(BlkActionState
*common
)
2101 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2104 hbitmap_free(state
->backup
);
2107 static void block_dirty_bitmap_enable_prepare(BlkActionState
*common
,
2110 BlockDirtyBitmap
*action
;
2111 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2114 if (action_check_completion_mode(common
, errp
) < 0) {
2118 action
= common
->action
->u
.block_dirty_bitmap_enable
.data
;
2119 state
->bitmap
= block_dirty_bitmap_lookup(action
->node
,
2123 if (!state
->bitmap
) {
2127 if (bdrv_dirty_bitmap_check(state
->bitmap
, BDRV_BITMAP_ALLOW_RO
, errp
)) {
2131 state
->was_enabled
= bdrv_dirty_bitmap_enabled(state
->bitmap
);
2132 bdrv_enable_dirty_bitmap(state
->bitmap
);
2135 static void block_dirty_bitmap_enable_abort(BlkActionState
*common
)
2137 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2140 if (!state
->was_enabled
) {
2141 bdrv_disable_dirty_bitmap(state
->bitmap
);
2145 static void block_dirty_bitmap_disable_prepare(BlkActionState
*common
,
2148 BlockDirtyBitmap
*action
;
2149 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2152 if (action_check_completion_mode(common
, errp
) < 0) {
2156 action
= common
->action
->u
.block_dirty_bitmap_disable
.data
;
2157 state
->bitmap
= block_dirty_bitmap_lookup(action
->node
,
2161 if (!state
->bitmap
) {
2165 if (bdrv_dirty_bitmap_check(state
->bitmap
, BDRV_BITMAP_ALLOW_RO
, errp
)) {
2169 state
->was_enabled
= bdrv_dirty_bitmap_enabled(state
->bitmap
);
2170 bdrv_disable_dirty_bitmap(state
->bitmap
);
2173 static void block_dirty_bitmap_disable_abort(BlkActionState
*common
)
2175 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2178 if (state
->was_enabled
) {
2179 bdrv_enable_dirty_bitmap(state
->bitmap
);
2183 static BdrvDirtyBitmap
*do_block_dirty_bitmap_merge(
2184 const char *node
, const char *target
,
2185 BlockDirtyBitmapMergeSourceList
*bitmaps
,
2186 HBitmap
**backup
, Error
**errp
);
2188 static void block_dirty_bitmap_merge_prepare(BlkActionState
*common
,
2191 BlockDirtyBitmapMerge
*action
;
2192 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2195 if (action_check_completion_mode(common
, errp
) < 0) {
2199 action
= common
->action
->u
.block_dirty_bitmap_merge
.data
;
2201 state
->bitmap
= do_block_dirty_bitmap_merge(action
->node
, action
->target
,
2202 action
->bitmaps
, &state
->backup
,
2206 static BdrvDirtyBitmap
*do_block_dirty_bitmap_remove(
2207 const char *node
, const char *name
, bool release
,
2208 BlockDriverState
**bitmap_bs
, Error
**errp
);
2210 static void block_dirty_bitmap_remove_prepare(BlkActionState
*common
,
2213 BlockDirtyBitmap
*action
;
2214 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2217 if (action_check_completion_mode(common
, errp
) < 0) {
2221 action
= common
->action
->u
.block_dirty_bitmap_remove
.data
;
2223 state
->bitmap
= do_block_dirty_bitmap_remove(action
->node
, action
->name
,
2224 false, &state
->bs
, errp
);
2225 if (state
->bitmap
) {
2226 bdrv_dirty_bitmap_skip_store(state
->bitmap
, true);
2227 bdrv_dirty_bitmap_set_busy(state
->bitmap
, true);
2231 static void block_dirty_bitmap_remove_abort(BlkActionState
*common
)
2233 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2236 if (state
->bitmap
) {
2237 bdrv_dirty_bitmap_skip_store(state
->bitmap
, false);
2238 bdrv_dirty_bitmap_set_busy(state
->bitmap
, false);
2242 static void block_dirty_bitmap_remove_commit(BlkActionState
*common
)
2244 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2247 bdrv_dirty_bitmap_set_busy(state
->bitmap
, false);
2248 bdrv_release_dirty_bitmap(state
->bitmap
);
2251 static void abort_prepare(BlkActionState
*common
, Error
**errp
)
2253 error_setg(errp
, "Transaction aborted using Abort action");
2256 static void abort_commit(BlkActionState
*common
)
2258 g_assert_not_reached(); /* this action never succeeds */
2261 static const BlkActionOps actions
[] = {
2262 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT
] = {
2263 .instance_size
= sizeof(ExternalSnapshotState
),
2264 .prepare
= external_snapshot_prepare
,
2265 .commit
= external_snapshot_commit
,
2266 .abort
= external_snapshot_abort
,
2267 .clean
= external_snapshot_clean
,
2269 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
] = {
2270 .instance_size
= sizeof(ExternalSnapshotState
),
2271 .prepare
= external_snapshot_prepare
,
2272 .commit
= external_snapshot_commit
,
2273 .abort
= external_snapshot_abort
,
2274 .clean
= external_snapshot_clean
,
2276 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP
] = {
2277 .instance_size
= sizeof(DriveBackupState
),
2278 .prepare
= drive_backup_prepare
,
2279 .commit
= drive_backup_commit
,
2280 .abort
= drive_backup_abort
,
2281 .clean
= drive_backup_clean
,
2283 [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP
] = {
2284 .instance_size
= sizeof(BlockdevBackupState
),
2285 .prepare
= blockdev_backup_prepare
,
2286 .commit
= blockdev_backup_commit
,
2287 .abort
= blockdev_backup_abort
,
2288 .clean
= blockdev_backup_clean
,
2290 [TRANSACTION_ACTION_KIND_ABORT
] = {
2291 .instance_size
= sizeof(BlkActionState
),
2292 .prepare
= abort_prepare
,
2293 .commit
= abort_commit
,
2295 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
] = {
2296 .instance_size
= sizeof(InternalSnapshotState
),
2297 .prepare
= internal_snapshot_prepare
,
2298 .abort
= internal_snapshot_abort
,
2299 .clean
= internal_snapshot_clean
,
2301 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD
] = {
2302 .instance_size
= sizeof(BlockDirtyBitmapState
),
2303 .prepare
= block_dirty_bitmap_add_prepare
,
2304 .abort
= block_dirty_bitmap_add_abort
,
2306 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR
] = {
2307 .instance_size
= sizeof(BlockDirtyBitmapState
),
2308 .prepare
= block_dirty_bitmap_clear_prepare
,
2309 .commit
= block_dirty_bitmap_free_backup
,
2310 .abort
= block_dirty_bitmap_restore
,
2312 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ENABLE
] = {
2313 .instance_size
= sizeof(BlockDirtyBitmapState
),
2314 .prepare
= block_dirty_bitmap_enable_prepare
,
2315 .abort
= block_dirty_bitmap_enable_abort
,
2317 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_DISABLE
] = {
2318 .instance_size
= sizeof(BlockDirtyBitmapState
),
2319 .prepare
= block_dirty_bitmap_disable_prepare
,
2320 .abort
= block_dirty_bitmap_disable_abort
,
2322 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_MERGE
] = {
2323 .instance_size
= sizeof(BlockDirtyBitmapState
),
2324 .prepare
= block_dirty_bitmap_merge_prepare
,
2325 .commit
= block_dirty_bitmap_free_backup
,
2326 .abort
= block_dirty_bitmap_restore
,
2328 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_REMOVE
] = {
2329 .instance_size
= sizeof(BlockDirtyBitmapState
),
2330 .prepare
= block_dirty_bitmap_remove_prepare
,
2331 .commit
= block_dirty_bitmap_remove_commit
,
2332 .abort
= block_dirty_bitmap_remove_abort
,
2334 /* Where are transactions for MIRROR, COMMIT and STREAM?
2335 * Although these blockjobs use transaction callbacks like the backup job,
2336 * these jobs do not necessarily adhere to transaction semantics.
2337 * These jobs may not fully undo all of their actions on abort, nor do they
2338 * necessarily work in transactions with more than one job in them.
2343 * Allocate a TransactionProperties structure if necessary, and fill
2344 * that structure with desired defaults if they are unset.
2346 static TransactionProperties
*get_transaction_properties(
2347 TransactionProperties
*props
)
2350 props
= g_new0(TransactionProperties
, 1);
2353 if (!props
->has_completion_mode
) {
2354 props
->has_completion_mode
= true;
2355 props
->completion_mode
= ACTION_COMPLETION_MODE_INDIVIDUAL
;
2362 * 'Atomic' group operations. The operations are performed as a set, and if
2363 * any fail then we roll back all operations in the group.
2365 void qmp_transaction(TransactionActionList
*dev_list
,
2367 struct TransactionProperties
*props
,
2370 TransactionActionList
*dev_entry
= dev_list
;
2371 JobTxn
*block_job_txn
= NULL
;
2372 BlkActionState
*state
, *next
;
2373 Error
*local_err
= NULL
;
2375 QTAILQ_HEAD(, BlkActionState
) snap_bdrv_states
;
2376 QTAILQ_INIT(&snap_bdrv_states
);
2378 /* Does this transaction get canceled as a group on failure?
2379 * If not, we don't really need to make a JobTxn.
2381 props
= get_transaction_properties(props
);
2382 if (props
->completion_mode
!= ACTION_COMPLETION_MODE_INDIVIDUAL
) {
2383 block_job_txn
= job_txn_new();
2386 /* drain all i/o before any operations */
2389 /* We don't do anything in this loop that commits us to the operations */
2390 while (NULL
!= dev_entry
) {
2391 TransactionAction
*dev_info
= NULL
;
2392 const BlkActionOps
*ops
;
2394 dev_info
= dev_entry
->value
;
2395 dev_entry
= dev_entry
->next
;
2397 assert(dev_info
->type
< ARRAY_SIZE(actions
));
2399 ops
= &actions
[dev_info
->type
];
2400 assert(ops
->instance_size
> 0);
2402 state
= g_malloc0(ops
->instance_size
);
2404 state
->action
= dev_info
;
2405 state
->block_job_txn
= block_job_txn
;
2406 state
->txn_props
= props
;
2407 QTAILQ_INSERT_TAIL(&snap_bdrv_states
, state
, entry
);
2409 state
->ops
->prepare(state
, &local_err
);
2411 error_propagate(errp
, local_err
);
2412 goto delete_and_fail
;
2416 QTAILQ_FOREACH(state
, &snap_bdrv_states
, entry
) {
2417 if (state
->ops
->commit
) {
2418 state
->ops
->commit(state
);
2426 /* failure, and it is all-or-none; roll back all operations */
2427 QTAILQ_FOREACH_REVERSE(state
, &snap_bdrv_states
, entry
) {
2428 if (state
->ops
->abort
) {
2429 state
->ops
->abort(state
);
2433 QTAILQ_FOREACH_SAFE(state
, &snap_bdrv_states
, entry
, next
) {
2434 if (state
->ops
->clean
) {
2435 state
->ops
->clean(state
);
2440 qapi_free_TransactionProperties(props
);
2442 job_txn_unref(block_job_txn
);
2445 void qmp_block_passwd(bool has_device
, const char *device
,
2446 bool has_node_name
, const char *node_name
,
2447 const char *password
, Error
**errp
)
2450 "Setting block passwords directly is no longer supported");
2453 void qmp_block_dirty_bitmap_add(const char *node
, const char *name
,
2454 bool has_granularity
, uint32_t granularity
,
2455 bool has_persistent
, bool persistent
,
2456 bool has_disabled
, bool disabled
,
2459 BlockDriverState
*bs
;
2460 BdrvDirtyBitmap
*bitmap
;
2461 AioContext
*aio_context
;
2463 if (!name
|| name
[0] == '\0') {
2464 error_setg(errp
, "Bitmap name cannot be empty");
2468 bs
= bdrv_lookup_bs(node
, node
, errp
);
2473 aio_context
= bdrv_get_aio_context(bs
);
2474 aio_context_acquire(aio_context
);
2476 if (has_granularity
) {
2477 if (granularity
< 512 || !is_power_of_2(granularity
)) {
2478 error_setg(errp
, "Granularity must be power of 2 "
2479 "and at least 512");
2483 /* Default to cluster size, if available: */
2484 granularity
= bdrv_get_default_bitmap_granularity(bs
);
2487 if (!has_persistent
) {
2491 if (!has_disabled
) {
2496 !bdrv_can_store_new_dirty_bitmap(bs
, name
, granularity
, errp
))
2501 bitmap
= bdrv_create_dirty_bitmap(bs
, granularity
, name
, errp
);
2502 if (bitmap
== NULL
) {
2507 bdrv_disable_dirty_bitmap(bitmap
);
2510 bdrv_dirty_bitmap_set_persistence(bitmap
, persistent
);
2513 aio_context_release(aio_context
);
2516 static BdrvDirtyBitmap
*do_block_dirty_bitmap_remove(
2517 const char *node
, const char *name
, bool release
,
2518 BlockDriverState
**bitmap_bs
, Error
**errp
)
2520 BlockDriverState
*bs
;
2521 BdrvDirtyBitmap
*bitmap
;
2522 AioContext
*aio_context
;
2524 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
2525 if (!bitmap
|| !bs
) {
2529 aio_context
= bdrv_get_aio_context(bs
);
2530 aio_context_acquire(aio_context
);
2532 if (bdrv_dirty_bitmap_check(bitmap
, BDRV_BITMAP_BUSY
| BDRV_BITMAP_RO
,
2534 aio_context_release(aio_context
);
2538 if (bdrv_dirty_bitmap_get_persistence(bitmap
) &&
2539 bdrv_remove_persistent_dirty_bitmap(bs
, name
, errp
) < 0)
2541 aio_context_release(aio_context
);
2546 bdrv_release_dirty_bitmap(bitmap
);
2553 aio_context_release(aio_context
);
2554 return release
? NULL
: bitmap
;
2557 void qmp_block_dirty_bitmap_remove(const char *node
, const char *name
,
2560 do_block_dirty_bitmap_remove(node
, name
, true, NULL
, errp
);
2564 * Completely clear a bitmap, for the purposes of synchronizing a bitmap
2565 * immediately after a full backup operation.
2567 void qmp_block_dirty_bitmap_clear(const char *node
, const char *name
,
2570 BdrvDirtyBitmap
*bitmap
;
2571 BlockDriverState
*bs
;
2573 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
2574 if (!bitmap
|| !bs
) {
2578 if (bdrv_dirty_bitmap_check(bitmap
, BDRV_BITMAP_DEFAULT
, errp
)) {
2582 bdrv_clear_dirty_bitmap(bitmap
, NULL
);
2585 void qmp_block_dirty_bitmap_enable(const char *node
, const char *name
,
2588 BlockDriverState
*bs
;
2589 BdrvDirtyBitmap
*bitmap
;
2591 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
2596 if (bdrv_dirty_bitmap_check(bitmap
, BDRV_BITMAP_ALLOW_RO
, errp
)) {
2600 bdrv_enable_dirty_bitmap(bitmap
);
2603 void qmp_block_dirty_bitmap_disable(const char *node
, const char *name
,
2606 BlockDriverState
*bs
;
2607 BdrvDirtyBitmap
*bitmap
;
2609 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
2614 if (bdrv_dirty_bitmap_check(bitmap
, BDRV_BITMAP_ALLOW_RO
, errp
)) {
2618 bdrv_disable_dirty_bitmap(bitmap
);
2621 static BdrvDirtyBitmap
*do_block_dirty_bitmap_merge(
2622 const char *node
, const char *target
,
2623 BlockDirtyBitmapMergeSourceList
*bitmaps
,
2624 HBitmap
**backup
, Error
**errp
)
2626 BlockDriverState
*bs
;
2627 BdrvDirtyBitmap
*dst
, *src
, *anon
;
2628 BlockDirtyBitmapMergeSourceList
*lst
;
2629 Error
*local_err
= NULL
;
2631 dst
= block_dirty_bitmap_lookup(node
, target
, &bs
, errp
);
2636 anon
= bdrv_create_dirty_bitmap(bs
, bdrv_dirty_bitmap_granularity(dst
),
2642 for (lst
= bitmaps
; lst
; lst
= lst
->next
) {
2643 switch (lst
->value
->type
) {
2644 const char *name
, *node
;
2646 name
= lst
->value
->u
.local
;
2647 src
= bdrv_find_dirty_bitmap(bs
, name
);
2649 error_setg(errp
, "Dirty bitmap '%s' not found", name
);
2655 node
= lst
->value
->u
.external
.node
;
2656 name
= lst
->value
->u
.external
.name
;
2657 src
= block_dirty_bitmap_lookup(node
, name
, NULL
, errp
);
2667 bdrv_merge_dirty_bitmap(anon
, src
, NULL
, &local_err
);
2669 error_propagate(errp
, local_err
);
2675 /* Merge into dst; dst is unchanged on failure. */
2676 bdrv_merge_dirty_bitmap(dst
, anon
, backup
, errp
);
2679 bdrv_release_dirty_bitmap(anon
);
2683 void qmp_block_dirty_bitmap_merge(const char *node
, const char *target
,
2684 BlockDirtyBitmapMergeSourceList
*bitmaps
,
2687 do_block_dirty_bitmap_merge(node
, target
, bitmaps
, NULL
, errp
);
2690 BlockDirtyBitmapSha256
*qmp_x_debug_block_dirty_bitmap_sha256(const char *node
,
2694 BdrvDirtyBitmap
*bitmap
;
2695 BlockDriverState
*bs
;
2696 BlockDirtyBitmapSha256
*ret
= NULL
;
2699 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
2700 if (!bitmap
|| !bs
) {
2704 sha256
= bdrv_dirty_bitmap_sha256(bitmap
, errp
);
2705 if (sha256
== NULL
) {
2709 ret
= g_new(BlockDirtyBitmapSha256
, 1);
2710 ret
->sha256
= sha256
;
2715 void qmp_block_resize(bool has_device
, const char *device
,
2716 bool has_node_name
, const char *node_name
,
2717 int64_t size
, Error
**errp
)
2719 Error
*local_err
= NULL
;
2720 BlockBackend
*blk
= NULL
;
2721 BlockDriverState
*bs
;
2722 AioContext
*aio_context
;
2725 bs
= bdrv_lookup_bs(has_device
? device
: NULL
,
2726 has_node_name
? node_name
: NULL
,
2729 error_propagate(errp
, local_err
);
2733 aio_context
= bdrv_get_aio_context(bs
);
2734 aio_context_acquire(aio_context
);
2737 error_setg(errp
, QERR_INVALID_PARAMETER_VALUE
, "size", "a >0 size");
2741 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_RESIZE
, NULL
)) {
2742 error_setg(errp
, QERR_DEVICE_IN_USE
, device
);
2746 blk
= blk_new(bdrv_get_aio_context(bs
), BLK_PERM_RESIZE
, BLK_PERM_ALL
);
2747 ret
= blk_insert_bs(blk
, bs
, errp
);
2752 bdrv_drained_begin(bs
);
2753 ret
= blk_truncate(blk
, size
, false, PREALLOC_MODE_OFF
, errp
);
2754 bdrv_drained_end(bs
);
2758 aio_context_release(aio_context
);
2761 void qmp_block_stream(bool has_job_id
, const char *job_id
, const char *device
,
2762 bool has_base
, const char *base
,
2763 bool has_base_node
, const char *base_node
,
2764 bool has_backing_file
, const char *backing_file
,
2765 bool has_speed
, int64_t speed
,
2766 bool has_on_error
, BlockdevOnError on_error
,
2767 bool has_auto_finalize
, bool auto_finalize
,
2768 bool has_auto_dismiss
, bool auto_dismiss
,
2771 BlockDriverState
*bs
, *iter
;
2772 BlockDriverState
*base_bs
= NULL
;
2773 AioContext
*aio_context
;
2774 Error
*local_err
= NULL
;
2775 const char *base_name
= NULL
;
2776 int job_flags
= JOB_DEFAULT
;
2778 if (!has_on_error
) {
2779 on_error
= BLOCKDEV_ON_ERROR_REPORT
;
2782 bs
= bdrv_lookup_bs(device
, device
, errp
);
2787 aio_context
= bdrv_get_aio_context(bs
);
2788 aio_context_acquire(aio_context
);
2790 if (has_base
&& has_base_node
) {
2791 error_setg(errp
, "'base' and 'base-node' cannot be specified "
2792 "at the same time");
2797 base_bs
= bdrv_find_backing_image(bs
, base
);
2798 if (base_bs
== NULL
) {
2799 error_setg(errp
, QERR_BASE_NOT_FOUND
, base
);
2802 assert(bdrv_get_aio_context(base_bs
) == aio_context
);
2806 if (has_base_node
) {
2807 base_bs
= bdrv_lookup_bs(NULL
, base_node
, errp
);
2811 if (bs
== base_bs
|| !bdrv_chain_contains(bs
, base_bs
)) {
2812 error_setg(errp
, "Node '%s' is not a backing image of '%s'",
2816 assert(bdrv_get_aio_context(base_bs
) == aio_context
);
2817 bdrv_refresh_filename(base_bs
);
2818 base_name
= base_bs
->filename
;
2821 /* Check for op blockers in the whole chain between bs and base */
2822 for (iter
= bs
; iter
&& iter
!= base_bs
; iter
= backing_bs(iter
)) {
2823 if (bdrv_op_is_blocked(iter
, BLOCK_OP_TYPE_STREAM
, errp
)) {
2828 /* if we are streaming the entire chain, the result will have no backing
2829 * file, and specifying one is therefore an error */
2830 if (base_bs
== NULL
&& has_backing_file
) {
2831 error_setg(errp
, "backing file specified, but streaming the "
2836 /* backing_file string overrides base bs filename */
2837 base_name
= has_backing_file
? backing_file
: base_name
;
2839 if (has_auto_finalize
&& !auto_finalize
) {
2840 job_flags
|= JOB_MANUAL_FINALIZE
;
2842 if (has_auto_dismiss
&& !auto_dismiss
) {
2843 job_flags
|= JOB_MANUAL_DISMISS
;
2846 stream_start(has_job_id
? job_id
: NULL
, bs
, base_bs
, base_name
,
2847 job_flags
, has_speed
? speed
: 0, on_error
, &local_err
);
2849 error_propagate(errp
, local_err
);
2853 trace_qmp_block_stream(bs
);
2856 aio_context_release(aio_context
);
2859 void qmp_block_commit(bool has_job_id
, const char *job_id
, const char *device
,
2860 bool has_base_node
, const char *base_node
,
2861 bool has_base
, const char *base
,
2862 bool has_top_node
, const char *top_node
,
2863 bool has_top
, const char *top
,
2864 bool has_backing_file
, const char *backing_file
,
2865 bool has_speed
, int64_t speed
,
2866 bool has_on_error
, BlockdevOnError on_error
,
2867 bool has_filter_node_name
, const char *filter_node_name
,
2868 bool has_auto_finalize
, bool auto_finalize
,
2869 bool has_auto_dismiss
, bool auto_dismiss
,
2872 BlockDriverState
*bs
;
2873 BlockDriverState
*iter
;
2874 BlockDriverState
*base_bs
, *top_bs
;
2875 AioContext
*aio_context
;
2876 Error
*local_err
= NULL
;
2877 int job_flags
= JOB_DEFAULT
;
2882 if (!has_on_error
) {
2883 on_error
= BLOCKDEV_ON_ERROR_REPORT
;
2885 if (!has_filter_node_name
) {
2886 filter_node_name
= NULL
;
2888 if (has_auto_finalize
&& !auto_finalize
) {
2889 job_flags
|= JOB_MANUAL_FINALIZE
;
2891 if (has_auto_dismiss
&& !auto_dismiss
) {
2892 job_flags
|= JOB_MANUAL_DISMISS
;
2896 * libvirt relies on the DeviceNotFound error class in order to probe for
2897 * live commit feature versions; for this to work, we must make sure to
2898 * perform the device lookup before any generic errors that may occur in a
2899 * scenario in which all optional arguments are omitted. */
2900 bs
= qmp_get_root_bs(device
, &local_err
);
2902 bs
= bdrv_lookup_bs(device
, device
, NULL
);
2904 error_free(local_err
);
2905 error_set(errp
, ERROR_CLASS_DEVICE_NOT_FOUND
,
2906 "Device '%s' not found", device
);
2908 error_propagate(errp
, local_err
);
2913 aio_context
= bdrv_get_aio_context(bs
);
2914 aio_context_acquire(aio_context
);
2916 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_COMMIT_SOURCE
, errp
)) {
2920 /* default top_bs is the active layer */
2923 if (has_top_node
&& has_top
) {
2924 error_setg(errp
, "'top-node' and 'top' are mutually exclusive");
2926 } else if (has_top_node
) {
2927 top_bs
= bdrv_lookup_bs(NULL
, top_node
, errp
);
2928 if (top_bs
== NULL
) {
2931 if (!bdrv_chain_contains(bs
, top_bs
)) {
2932 error_setg(errp
, "'%s' is not in this backing file chain",
2936 } else if (has_top
&& top
) {
2937 /* This strcmp() is just a shortcut, there is no need to
2938 * refresh @bs's filename. If it mismatches,
2939 * bdrv_find_backing_image() will do the refresh and may still
2941 if (strcmp(bs
->filename
, top
) != 0) {
2942 top_bs
= bdrv_find_backing_image(bs
, top
);
2946 if (top_bs
== NULL
) {
2947 error_setg(errp
, "Top image file %s not found", top
? top
: "NULL");
2951 assert(bdrv_get_aio_context(top_bs
) == aio_context
);
2953 if (has_base_node
&& has_base
) {
2954 error_setg(errp
, "'base-node' and 'base' are mutually exclusive");
2956 } else if (has_base_node
) {
2957 base_bs
= bdrv_lookup_bs(NULL
, base_node
, errp
);
2958 if (base_bs
== NULL
) {
2961 if (!bdrv_chain_contains(top_bs
, base_bs
)) {
2962 error_setg(errp
, "'%s' is not in this backing file chain",
2966 } else if (has_base
&& base
) {
2967 base_bs
= bdrv_find_backing_image(top_bs
, base
);
2969 base_bs
= bdrv_find_base(top_bs
);
2972 if (base_bs
== NULL
) {
2973 error_setg(errp
, QERR_BASE_NOT_FOUND
, base
? base
: "NULL");
2977 assert(bdrv_get_aio_context(base_bs
) == aio_context
);
2979 for (iter
= top_bs
; iter
!= backing_bs(base_bs
); iter
= backing_bs(iter
)) {
2980 if (bdrv_op_is_blocked(iter
, BLOCK_OP_TYPE_COMMIT_TARGET
, errp
)) {
2985 /* Do not allow attempts to commit an image into itself */
2986 if (top_bs
== base_bs
) {
2987 error_setg(errp
, "cannot commit an image into itself");
2992 if (has_backing_file
) {
2993 error_setg(errp
, "'backing-file' specified,"
2994 " but 'top' is the active layer");
2997 commit_active_start(has_job_id
? job_id
: NULL
, bs
, base_bs
,
2998 job_flags
, speed
, on_error
,
2999 filter_node_name
, NULL
, NULL
, false, &local_err
);
3001 BlockDriverState
*overlay_bs
= bdrv_find_overlay(bs
, top_bs
);
3002 if (bdrv_op_is_blocked(overlay_bs
, BLOCK_OP_TYPE_COMMIT_TARGET
, errp
)) {
3005 commit_start(has_job_id
? job_id
: NULL
, bs
, base_bs
, top_bs
, job_flags
,
3006 speed
, on_error
, has_backing_file
? backing_file
: NULL
,
3007 filter_node_name
, &local_err
);
3009 if (local_err
!= NULL
) {
3010 error_propagate(errp
, local_err
);
3015 aio_context_release(aio_context
);
3018 /* Common QMP interface for drive-backup and blockdev-backup */
3019 static BlockJob
*do_backup_common(BackupCommon
*backup
,
3020 BlockDriverState
*bs
,
3021 BlockDriverState
*target_bs
,
3022 AioContext
*aio_context
,
3023 JobTxn
*txn
, Error
**errp
)
3025 BlockJob
*job
= NULL
;
3026 BdrvDirtyBitmap
*bmap
= NULL
;
3027 int job_flags
= JOB_DEFAULT
;
3029 if (!backup
->has_speed
) {
3032 if (!backup
->has_on_source_error
) {
3033 backup
->on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
3035 if (!backup
->has_on_target_error
) {
3036 backup
->on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
3038 if (!backup
->has_job_id
) {
3039 backup
->job_id
= NULL
;
3041 if (!backup
->has_auto_finalize
) {
3042 backup
->auto_finalize
= true;
3044 if (!backup
->has_auto_dismiss
) {
3045 backup
->auto_dismiss
= true;
3047 if (!backup
->has_compress
) {
3048 backup
->compress
= false;
3051 if ((backup
->sync
== MIRROR_SYNC_MODE_BITMAP
) ||
3052 (backup
->sync
== MIRROR_SYNC_MODE_INCREMENTAL
)) {
3053 /* done before desugaring 'incremental' to print the right message */
3054 if (!backup
->has_bitmap
) {
3055 error_setg(errp
, "must provide a valid bitmap name for "
3056 "'%s' sync mode", MirrorSyncMode_str(backup
->sync
));
3061 if (backup
->sync
== MIRROR_SYNC_MODE_INCREMENTAL
) {
3062 if (backup
->has_bitmap_mode
&&
3063 backup
->bitmap_mode
!= BITMAP_SYNC_MODE_ON_SUCCESS
) {
3064 error_setg(errp
, "Bitmap sync mode must be '%s' "
3065 "when using sync mode '%s'",
3066 BitmapSyncMode_str(BITMAP_SYNC_MODE_ON_SUCCESS
),
3067 MirrorSyncMode_str(backup
->sync
));
3070 backup
->has_bitmap_mode
= true;
3071 backup
->sync
= MIRROR_SYNC_MODE_BITMAP
;
3072 backup
->bitmap_mode
= BITMAP_SYNC_MODE_ON_SUCCESS
;
3075 if (backup
->has_bitmap
) {
3076 bmap
= bdrv_find_dirty_bitmap(bs
, backup
->bitmap
);
3078 error_setg(errp
, "Bitmap '%s' could not be found", backup
->bitmap
);
3081 if (!backup
->has_bitmap_mode
) {
3082 error_setg(errp
, "Bitmap sync mode must be given "
3083 "when providing a bitmap");
3086 if (bdrv_dirty_bitmap_check(bmap
, BDRV_BITMAP_ALLOW_RO
, errp
)) {
3090 /* This does not produce a useful bitmap artifact: */
3091 if (backup
->sync
== MIRROR_SYNC_MODE_NONE
) {
3092 error_setg(errp
, "sync mode '%s' does not produce meaningful bitmap"
3093 " outputs", MirrorSyncMode_str(backup
->sync
));
3097 /* If the bitmap isn't used for input or output, this is useless: */
3098 if (backup
->bitmap_mode
== BITMAP_SYNC_MODE_NEVER
&&
3099 backup
->sync
!= MIRROR_SYNC_MODE_BITMAP
) {
3100 error_setg(errp
, "Bitmap sync mode '%s' has no meaningful effect"
3101 " when combined with sync mode '%s'",
3102 BitmapSyncMode_str(backup
->bitmap_mode
),
3103 MirrorSyncMode_str(backup
->sync
));
3108 if (!backup
->has_bitmap
&& backup
->has_bitmap_mode
) {
3109 error_setg(errp
, "Cannot specify bitmap sync mode without a bitmap");
3113 if (!backup
->auto_finalize
) {
3114 job_flags
|= JOB_MANUAL_FINALIZE
;
3116 if (!backup
->auto_dismiss
) {
3117 job_flags
|= JOB_MANUAL_DISMISS
;
3120 job
= backup_job_create(backup
->job_id
, bs
, target_bs
, backup
->speed
,
3121 backup
->sync
, bmap
, backup
->bitmap_mode
,
3123 backup
->filter_node_name
,
3124 backup
->on_source_error
,
3125 backup
->on_target_error
,
3126 job_flags
, NULL
, NULL
, txn
, errp
);
3130 void qmp_drive_backup(DriveBackup
*backup
, Error
**errp
)
3132 TransactionAction action
= {
3133 .type
= TRANSACTION_ACTION_KIND_DRIVE_BACKUP
,
3134 .u
.drive_backup
.data
= backup
,
3136 blockdev_do_action(&action
, errp
);
3139 BlockDeviceInfoList
*qmp_query_named_block_nodes(bool has_flat
,
3143 bool return_flat
= has_flat
&& flat
;
3145 return bdrv_named_nodes_list(return_flat
, errp
);
3148 XDbgBlockGraph
*qmp_x_debug_query_block_graph(Error
**errp
)
3150 return bdrv_get_xdbg_block_graph(errp
);
3153 void qmp_blockdev_backup(BlockdevBackup
*backup
, Error
**errp
)
3155 TransactionAction action
= {
3156 .type
= TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP
,
3157 .u
.blockdev_backup
.data
= backup
,
3159 blockdev_do_action(&action
, errp
);
3162 /* Parameter check and block job starting for drive mirroring.
3163 * Caller should hold @device and @target's aio context (must be the same).
3165 static void blockdev_mirror_common(const char *job_id
, BlockDriverState
*bs
,
3166 BlockDriverState
*target
,
3167 bool has_replaces
, const char *replaces
,
3168 enum MirrorSyncMode sync
,
3169 BlockMirrorBackingMode backing_mode
,
3171 bool has_speed
, int64_t speed
,
3172 bool has_granularity
, uint32_t granularity
,
3173 bool has_buf_size
, int64_t buf_size
,
3174 bool has_on_source_error
,
3175 BlockdevOnError on_source_error
,
3176 bool has_on_target_error
,
3177 BlockdevOnError on_target_error
,
3178 bool has_unmap
, bool unmap
,
3179 bool has_filter_node_name
,
3180 const char *filter_node_name
,
3181 bool has_copy_mode
, MirrorCopyMode copy_mode
,
3182 bool has_auto_finalize
, bool auto_finalize
,
3183 bool has_auto_dismiss
, bool auto_dismiss
,
3186 int job_flags
= JOB_DEFAULT
;
3191 if (!has_on_source_error
) {
3192 on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
3194 if (!has_on_target_error
) {
3195 on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
3197 if (!has_granularity
) {
3200 if (!has_buf_size
) {
3206 if (!has_filter_node_name
) {
3207 filter_node_name
= NULL
;
3209 if (!has_copy_mode
) {
3210 copy_mode
= MIRROR_COPY_MODE_BACKGROUND
;
3212 if (has_auto_finalize
&& !auto_finalize
) {
3213 job_flags
|= JOB_MANUAL_FINALIZE
;
3215 if (has_auto_dismiss
&& !auto_dismiss
) {
3216 job_flags
|= JOB_MANUAL_DISMISS
;
3219 if (granularity
!= 0 && (granularity
< 512 || granularity
> 1048576 * 64)) {
3220 error_setg(errp
, QERR_INVALID_PARAMETER_VALUE
, "granularity",
3221 "a value in range [512B, 64MB]");
3224 if (granularity
& (granularity
- 1)) {
3225 error_setg(errp
, QERR_INVALID_PARAMETER_VALUE
, "granularity",
3230 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_MIRROR_SOURCE
, errp
)) {
3233 if (bdrv_op_is_blocked(target
, BLOCK_OP_TYPE_MIRROR_TARGET
, errp
)) {
3237 if (!bs
->backing
&& sync
== MIRROR_SYNC_MODE_TOP
) {
3238 sync
= MIRROR_SYNC_MODE_FULL
;
3242 BlockDriverState
*to_replace_bs
;
3243 AioContext
*replace_aio_context
;
3244 int64_t bs_size
, replace_size
;
3246 bs_size
= bdrv_getlength(bs
);
3248 error_setg_errno(errp
, -bs_size
, "Failed to query device's size");
3252 to_replace_bs
= check_to_replace_node(bs
, replaces
, errp
);
3253 if (!to_replace_bs
) {
3257 replace_aio_context
= bdrv_get_aio_context(to_replace_bs
);
3258 aio_context_acquire(replace_aio_context
);
3259 replace_size
= bdrv_getlength(to_replace_bs
);
3260 aio_context_release(replace_aio_context
);
3262 if (replace_size
< 0) {
3263 error_setg_errno(errp
, -replace_size
,
3264 "Failed to query the replacement node's size");
3267 if (bs_size
!= replace_size
) {
3268 error_setg(errp
, "cannot replace image with a mirror image of "
3274 /* pass the node name to replace to mirror start since it's loose coupling
3275 * and will allow to check whether the node still exist at mirror completion
3277 mirror_start(job_id
, bs
, target
,
3278 has_replaces
? replaces
: NULL
, job_flags
,
3279 speed
, granularity
, buf_size
, sync
, backing_mode
, zero_target
,
3280 on_source_error
, on_target_error
, unmap
, filter_node_name
,
3284 void qmp_drive_mirror(DriveMirror
*arg
, Error
**errp
)
3286 BlockDriverState
*bs
;
3287 BlockDriverState
*source
, *target_bs
;
3288 AioContext
*aio_context
;
3289 AioContext
*old_context
;
3290 BlockMirrorBackingMode backing_mode
;
3291 Error
*local_err
= NULL
;
3292 QDict
*options
= NULL
;
3295 const char *format
= arg
->format
;
3299 bs
= qmp_get_root_bs(arg
->device
, errp
);
3304 /* Early check to avoid creating target */
3305 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_MIRROR_SOURCE
, errp
)) {
3309 aio_context
= bdrv_get_aio_context(bs
);
3310 aio_context_acquire(aio_context
);
3312 if (!arg
->has_mode
) {
3313 arg
->mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
3316 if (!arg
->has_format
) {
3317 format
= (arg
->mode
== NEW_IMAGE_MODE_EXISTING
3318 ? NULL
: bs
->drv
->format_name
);
3321 flags
= bs
->open_flags
| BDRV_O_RDWR
;
3322 source
= backing_bs(bs
);
3323 if (!source
&& arg
->sync
== MIRROR_SYNC_MODE_TOP
) {
3324 arg
->sync
= MIRROR_SYNC_MODE_FULL
;
3326 if (arg
->sync
== MIRROR_SYNC_MODE_NONE
) {
3330 size
= bdrv_getlength(bs
);
3332 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
3336 if (arg
->has_replaces
) {
3337 if (!arg
->has_node_name
) {
3338 error_setg(errp
, "a node-name must be provided when replacing a"
3339 " named node of the graph");
3344 if (arg
->mode
== NEW_IMAGE_MODE_ABSOLUTE_PATHS
) {
3345 backing_mode
= MIRROR_SOURCE_BACKING_CHAIN
;
3347 backing_mode
= MIRROR_OPEN_BACKING_CHAIN
;
3350 /* Don't open backing image in create() */
3351 flags
|= BDRV_O_NO_BACKING
;
3353 if ((arg
->sync
== MIRROR_SYNC_MODE_FULL
|| !source
)
3354 && arg
->mode
!= NEW_IMAGE_MODE_EXISTING
)
3356 /* create new image w/o backing file */
3358 bdrv_img_create(arg
->target
, format
,
3359 NULL
, NULL
, NULL
, size
, flags
, false, &local_err
);
3361 switch (arg
->mode
) {
3362 case NEW_IMAGE_MODE_EXISTING
:
3364 case NEW_IMAGE_MODE_ABSOLUTE_PATHS
:
3365 /* create new image with backing file */
3366 bdrv_refresh_filename(source
);
3367 bdrv_img_create(arg
->target
, format
,
3369 source
->drv
->format_name
,
3370 NULL
, size
, flags
, false, &local_err
);
3378 error_propagate(errp
, local_err
);
3382 options
= qdict_new();
3383 if (arg
->has_node_name
) {
3384 qdict_put_str(options
, "node-name", arg
->node_name
);
3387 qdict_put_str(options
, "driver", format
);
3390 /* Mirroring takes care of copy-on-write using the source's backing
3393 target_bs
= bdrv_open(arg
->target
, NULL
, options
, flags
, errp
);
3398 zero_target
= (arg
->sync
== MIRROR_SYNC_MODE_FULL
&&
3399 (arg
->mode
== NEW_IMAGE_MODE_EXISTING
||
3400 !bdrv_has_zero_init(target_bs
)));
3403 /* Honor bdrv_try_set_aio_context() context acquisition requirements. */
3404 old_context
= bdrv_get_aio_context(target_bs
);
3405 aio_context_release(aio_context
);
3406 aio_context_acquire(old_context
);
3408 ret
= bdrv_try_set_aio_context(target_bs
, aio_context
, errp
);
3410 bdrv_unref(target_bs
);
3411 aio_context_release(old_context
);
3415 aio_context_release(old_context
);
3416 aio_context_acquire(aio_context
);
3418 blockdev_mirror_common(arg
->has_job_id
? arg
->job_id
: NULL
, bs
, target_bs
,
3419 arg
->has_replaces
, arg
->replaces
, arg
->sync
,
3420 backing_mode
, zero_target
,
3421 arg
->has_speed
, arg
->speed
,
3422 arg
->has_granularity
, arg
->granularity
,
3423 arg
->has_buf_size
, arg
->buf_size
,
3424 arg
->has_on_source_error
, arg
->on_source_error
,
3425 arg
->has_on_target_error
, arg
->on_target_error
,
3426 arg
->has_unmap
, arg
->unmap
,
3428 arg
->has_copy_mode
, arg
->copy_mode
,
3429 arg
->has_auto_finalize
, arg
->auto_finalize
,
3430 arg
->has_auto_dismiss
, arg
->auto_dismiss
,
3432 bdrv_unref(target_bs
);
3433 error_propagate(errp
, local_err
);
3435 aio_context_release(aio_context
);
3438 void qmp_blockdev_mirror(bool has_job_id
, const char *job_id
,
3439 const char *device
, const char *target
,
3440 bool has_replaces
, const char *replaces
,
3441 MirrorSyncMode sync
,
3442 bool has_speed
, int64_t speed
,
3443 bool has_granularity
, uint32_t granularity
,
3444 bool has_buf_size
, int64_t buf_size
,
3445 bool has_on_source_error
,
3446 BlockdevOnError on_source_error
,
3447 bool has_on_target_error
,
3448 BlockdevOnError on_target_error
,
3449 bool has_filter_node_name
,
3450 const char *filter_node_name
,
3451 bool has_copy_mode
, MirrorCopyMode copy_mode
,
3452 bool has_auto_finalize
, bool auto_finalize
,
3453 bool has_auto_dismiss
, bool auto_dismiss
,
3456 BlockDriverState
*bs
;
3457 BlockDriverState
*target_bs
;
3458 AioContext
*aio_context
;
3459 AioContext
*old_context
;
3460 BlockMirrorBackingMode backing_mode
= MIRROR_LEAVE_BACKING_CHAIN
;
3461 Error
*local_err
= NULL
;
3465 bs
= qmp_get_root_bs(device
, errp
);
3470 target_bs
= bdrv_lookup_bs(target
, target
, errp
);
3475 zero_target
= (sync
== MIRROR_SYNC_MODE_FULL
);
3477 /* Honor bdrv_try_set_aio_context() context acquisition requirements. */
3478 old_context
= bdrv_get_aio_context(target_bs
);
3479 aio_context
= bdrv_get_aio_context(bs
);
3480 aio_context_acquire(old_context
);
3482 ret
= bdrv_try_set_aio_context(target_bs
, aio_context
, errp
);
3484 aio_context_release(old_context
);
3485 aio_context_acquire(aio_context
);
3491 blockdev_mirror_common(has_job_id
? job_id
: NULL
, bs
, target_bs
,
3492 has_replaces
, replaces
, sync
, backing_mode
,
3493 zero_target
, has_speed
, speed
,
3494 has_granularity
, granularity
,
3495 has_buf_size
, buf_size
,
3496 has_on_source_error
, on_source_error
,
3497 has_on_target_error
, on_target_error
,
3499 has_filter_node_name
, filter_node_name
,
3500 has_copy_mode
, copy_mode
,
3501 has_auto_finalize
, auto_finalize
,
3502 has_auto_dismiss
, auto_dismiss
,
3504 error_propagate(errp
, local_err
);
3506 aio_context_release(aio_context
);
3509 /* Get a block job using its ID and acquire its AioContext */
3510 static BlockJob
*find_block_job(const char *id
, AioContext
**aio_context
,
3517 *aio_context
= NULL
;
3519 job
= block_job_get(id
);
3522 error_set(errp
, ERROR_CLASS_DEVICE_NOT_ACTIVE
,
3523 "Block job '%s' not found", id
);
3527 *aio_context
= blk_get_aio_context(job
->blk
);
3528 aio_context_acquire(*aio_context
);
3533 void qmp_block_job_set_speed(const char *device
, int64_t speed
, Error
**errp
)
3535 AioContext
*aio_context
;
3536 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
3542 block_job_set_speed(job
, speed
, errp
);
3543 aio_context_release(aio_context
);
3546 void qmp_block_job_cancel(const char *device
,
3547 bool has_force
, bool force
, Error
**errp
)
3549 AioContext
*aio_context
;
3550 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
3560 if (job_user_paused(&job
->job
) && !force
) {
3561 error_setg(errp
, "The block job for device '%s' is currently paused",
3566 trace_qmp_block_job_cancel(job
);
3567 job_user_cancel(&job
->job
, force
, errp
);
3569 aio_context_release(aio_context
);
3572 void qmp_block_job_pause(const char *device
, Error
**errp
)
3574 AioContext
*aio_context
;
3575 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
3581 trace_qmp_block_job_pause(job
);
3582 job_user_pause(&job
->job
, errp
);
3583 aio_context_release(aio_context
);
3586 void qmp_block_job_resume(const char *device
, Error
**errp
)
3588 AioContext
*aio_context
;
3589 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
3595 trace_qmp_block_job_resume(job
);
3596 job_user_resume(&job
->job
, errp
);
3597 aio_context_release(aio_context
);
3600 void qmp_block_job_complete(const char *device
, Error
**errp
)
3602 AioContext
*aio_context
;
3603 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
3609 trace_qmp_block_job_complete(job
);
3610 job_complete(&job
->job
, errp
);
3611 aio_context_release(aio_context
);
3614 void qmp_block_job_finalize(const char *id
, Error
**errp
)
3616 AioContext
*aio_context
;
3617 BlockJob
*job
= find_block_job(id
, &aio_context
, errp
);
3623 trace_qmp_block_job_finalize(job
);
3624 job_finalize(&job
->job
, errp
);
3625 aio_context_release(aio_context
);
3628 void qmp_block_job_dismiss(const char *id
, Error
**errp
)
3630 AioContext
*aio_context
;
3631 BlockJob
*bjob
= find_block_job(id
, &aio_context
, errp
);
3638 trace_qmp_block_job_dismiss(bjob
);
3640 job_dismiss(&job
, errp
);
3641 aio_context_release(aio_context
);
3644 void qmp_change_backing_file(const char *device
,
3645 const char *image_node_name
,
3646 const char *backing_file
,
3649 BlockDriverState
*bs
= NULL
;
3650 AioContext
*aio_context
;
3651 BlockDriverState
*image_bs
= NULL
;
3652 Error
*local_err
= NULL
;
3656 bs
= qmp_get_root_bs(device
, errp
);
3661 aio_context
= bdrv_get_aio_context(bs
);
3662 aio_context_acquire(aio_context
);
3664 image_bs
= bdrv_lookup_bs(NULL
, image_node_name
, &local_err
);
3666 error_propagate(errp
, local_err
);
3671 error_setg(errp
, "image file not found");
3675 if (bdrv_find_base(image_bs
) == image_bs
) {
3676 error_setg(errp
, "not allowing backing file change on an image "
3677 "without a backing file");
3681 /* even though we are not necessarily operating on bs, we need it to
3682 * determine if block ops are currently prohibited on the chain */
3683 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_CHANGE
, errp
)) {
3687 /* final sanity check */
3688 if (!bdrv_chain_contains(bs
, image_bs
)) {
3689 error_setg(errp
, "'%s' and image file are not in the same chain",
3694 /* if not r/w, reopen to make r/w */
3695 ro
= bdrv_is_read_only(image_bs
);
3698 if (bdrv_reopen_set_read_only(image_bs
, false, errp
) != 0) {
3703 ret
= bdrv_change_backing_file(image_bs
, backing_file
,
3704 image_bs
->drv
? image_bs
->drv
->format_name
: "");
3707 error_setg_errno(errp
, -ret
, "Could not change backing file to '%s'",
3709 /* don't exit here, so we can try to restore open flags if
3714 bdrv_reopen_set_read_only(image_bs
, true, &local_err
);
3715 error_propagate(errp
, local_err
);
3719 aio_context_release(aio_context
);
3723 void hmp_drive_add_node(Monitor
*mon
, const char *optstr
)
3727 Error
*local_err
= NULL
;
3729 opts
= qemu_opts_parse_noisily(&qemu_drive_opts
, optstr
, false);
3734 qdict
= qemu_opts_to_qdict(opts
, NULL
);
3736 if (!qdict_get_try_str(qdict
, "node-name")) {
3737 qobject_unref(qdict
);
3738 error_report("'node-name' needs to be specified");
3742 BlockDriverState
*bs
= bds_tree_init(qdict
, &local_err
);
3744 error_report_err(local_err
);
3748 QTAILQ_INSERT_TAIL(&monitor_bdrv_states
, bs
, monitor_list
);
3751 qemu_opts_del(opts
);
3754 void qmp_blockdev_add(BlockdevOptions
*options
, Error
**errp
)
3756 BlockDriverState
*bs
;
3758 Visitor
*v
= qobject_output_visitor_new(&obj
);
3760 Error
*local_err
= NULL
;
3762 visit_type_BlockdevOptions(v
, NULL
, &options
, &local_err
);
3764 error_propagate(errp
, local_err
);
3768 visit_complete(v
, &obj
);
3769 qdict
= qobject_to(QDict
, obj
);
3771 qdict_flatten(qdict
);
3773 if (!qdict_get_try_str(qdict
, "node-name")) {
3774 error_setg(errp
, "'node-name' must be specified for the root node");
3778 bs
= bds_tree_init(qdict
, errp
);
3783 QTAILQ_INSERT_TAIL(&monitor_bdrv_states
, bs
, monitor_list
);
3789 void qmp_x_blockdev_reopen(BlockdevOptions
*options
, Error
**errp
)
3791 BlockDriverState
*bs
;
3794 Visitor
*v
= qobject_output_visitor_new(&obj
);
3795 Error
*local_err
= NULL
;
3796 BlockReopenQueue
*queue
;
3799 /* Check for the selected node name */
3800 if (!options
->has_node_name
) {
3801 error_setg(errp
, "Node name not specified");
3805 bs
= bdrv_find_node(options
->node_name
);
3807 error_setg(errp
, "Cannot find node named '%s'", options
->node_name
);
3811 /* Put all options in a QDict and flatten it */
3812 visit_type_BlockdevOptions(v
, NULL
, &options
, &local_err
);
3814 error_propagate(errp
, local_err
);
3818 visit_complete(v
, &obj
);
3819 qdict
= qobject_to(QDict
, obj
);
3821 qdict_flatten(qdict
);
3823 /* Perform the reopen operation */
3824 ctx
= bdrv_get_aio_context(bs
);
3825 aio_context_acquire(ctx
);
3826 bdrv_subtree_drained_begin(bs
);
3827 queue
= bdrv_reopen_queue(NULL
, bs
, qdict
, false);
3828 bdrv_reopen_multiple(queue
, errp
);
3829 bdrv_subtree_drained_end(bs
);
3830 aio_context_release(ctx
);
3836 void qmp_blockdev_del(const char *node_name
, Error
**errp
)
3838 AioContext
*aio_context
;
3839 BlockDriverState
*bs
;
3841 bs
= bdrv_find_node(node_name
);
3843 error_setg(errp
, "Cannot find node %s", node_name
);
3846 if (bdrv_has_blk(bs
)) {
3847 error_setg(errp
, "Node %s is in use", node_name
);
3850 aio_context
= bdrv_get_aio_context(bs
);
3851 aio_context_acquire(aio_context
);
3853 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_DRIVE_DEL
, errp
)) {
3857 if (!QTAILQ_IN_USE(bs
, monitor_list
)) {
3858 error_setg(errp
, "Node %s is not owned by the monitor",
3863 if (bs
->refcnt
> 1) {
3864 error_setg(errp
, "Block device %s is in use",
3865 bdrv_get_device_or_node_name(bs
));
3869 QTAILQ_REMOVE(&monitor_bdrv_states
, bs
, monitor_list
);
3873 aio_context_release(aio_context
);
3876 static BdrvChild
*bdrv_find_child(BlockDriverState
*parent_bs
,
3877 const char *child_name
)
3881 QLIST_FOREACH(child
, &parent_bs
->children
, next
) {
3882 if (strcmp(child
->name
, child_name
) == 0) {
3890 void qmp_x_blockdev_change(const char *parent
, bool has_child
,
3891 const char *child
, bool has_node
,
3892 const char *node
, Error
**errp
)
3894 BlockDriverState
*parent_bs
, *new_bs
= NULL
;
3897 parent_bs
= bdrv_lookup_bs(parent
, parent
, errp
);
3902 if (has_child
== has_node
) {
3904 error_setg(errp
, "The parameters child and node are in conflict");
3906 error_setg(errp
, "Either child or node must be specified");
3912 p_child
= bdrv_find_child(parent_bs
, child
);
3914 error_setg(errp
, "Node '%s' does not have child '%s'",
3918 bdrv_del_child(parent_bs
, p_child
, errp
);
3922 new_bs
= bdrv_find_node(node
);
3924 error_setg(errp
, "Node '%s' not found", node
);
3927 bdrv_add_child(parent_bs
, new_bs
, errp
);
3931 BlockJobInfoList
*qmp_query_block_jobs(Error
**errp
)
3933 BlockJobInfoList
*head
= NULL
, **p_next
= &head
;
3936 for (job
= block_job_next(NULL
); job
; job
= block_job_next(job
)) {
3937 BlockJobInfoList
*elem
;
3938 AioContext
*aio_context
;
3940 if (block_job_is_internal(job
)) {
3943 elem
= g_new0(BlockJobInfoList
, 1);
3944 aio_context
= blk_get_aio_context(job
->blk
);
3945 aio_context_acquire(aio_context
);
3946 elem
->value
= block_job_query(job
, errp
);
3947 aio_context_release(aio_context
);
3950 qapi_free_BlockJobInfoList(head
);
3954 p_next
= &elem
->next
;
3960 void qmp_x_blockdev_set_iothread(const char *node_name
, StrOrNull
*iothread
,
3961 bool has_force
, bool force
, Error
**errp
)
3963 AioContext
*old_context
;
3964 AioContext
*new_context
;
3965 BlockDriverState
*bs
;
3967 bs
= bdrv_find_node(node_name
);
3969 error_setg(errp
, "Cannot find node %s", node_name
);
3973 /* Protects against accidents. */
3974 if (!(has_force
&& force
) && bdrv_has_blk(bs
)) {
3975 error_setg(errp
, "Node %s is associated with a BlockBackend and could "
3976 "be in use (use force=true to override this check)",
3981 if (iothread
->type
== QTYPE_QSTRING
) {
3982 IOThread
*obj
= iothread_by_id(iothread
->u
.s
);
3984 error_setg(errp
, "Cannot find iothread %s", iothread
->u
.s
);
3988 new_context
= iothread_get_aio_context(obj
);
3990 new_context
= qemu_get_aio_context();
3993 old_context
= bdrv_get_aio_context(bs
);
3994 aio_context_acquire(old_context
);
3996 bdrv_try_set_aio_context(bs
, new_context
, errp
);
3998 aio_context_release(old_context
);
4001 QemuOptsList qemu_common_drive_opts
= {
4003 .head
= QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts
.head
),
4007 .type
= QEMU_OPT_BOOL
,
4008 .help
= "enable/disable snapshot mode",
4011 .type
= QEMU_OPT_STRING
,
4012 .help
= "host AIO implementation (threads, native, io_uring)",
4014 .name
= BDRV_OPT_CACHE_WB
,
4015 .type
= QEMU_OPT_BOOL
,
4016 .help
= "Enable writeback mode",
4019 .type
= QEMU_OPT_STRING
,
4020 .help
= "disk format (raw, qcow2, ...)",
4023 .type
= QEMU_OPT_STRING
,
4024 .help
= "read error action",
4027 .type
= QEMU_OPT_STRING
,
4028 .help
= "write error action",
4030 .name
= BDRV_OPT_READ_ONLY
,
4031 .type
= QEMU_OPT_BOOL
,
4032 .help
= "open drive file as read-only",
4038 .name
= "throttling.group",
4039 .type
= QEMU_OPT_STRING
,
4040 .help
= "name of the block throttling group",
4042 .name
= "copy-on-read",
4043 .type
= QEMU_OPT_BOOL
,
4044 .help
= "copy read data from backing file into image file",
4046 .name
= "detect-zeroes",
4047 .type
= QEMU_OPT_STRING
,
4048 .help
= "try to optimize zero writes (off, on, unmap)",
4050 .name
= "stats-account-invalid",
4051 .type
= QEMU_OPT_BOOL
,
4052 .help
= "whether to account for invalid I/O operations "
4053 "in the statistics",
4055 .name
= "stats-account-failed",
4056 .type
= QEMU_OPT_BOOL
,
4057 .help
= "whether to account for failed I/O operations "
4058 "in the statistics",
4060 { /* end of list */ }
4064 QemuOptsList qemu_drive_opts
= {
4066 .head
= QTAILQ_HEAD_INITIALIZER(qemu_drive_opts
.head
),
4069 * no elements => accept any params
4070 * validation will happen later
4072 { /* end of list */ }