2 * QEMU host block devices
4 * Copyright (c) 2003-2008 Fabrice Bellard
6 * This work is licensed under the terms of the GNU GPL, version 2 or
7 * later. See the COPYING file in the top-level directory.
9 * This file incorporates work covered by the following copyright and
12 * Copyright (c) 2003-2008 Fabrice Bellard
14 * Permission is hereby granted, free of charge, to any person obtaining a copy
15 * of this software and associated documentation files (the "Software"), to deal
16 * in the Software without restriction, including without limitation the rights
17 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
18 * copies of the Software, and to permit persons to whom the Software is
19 * furnished to do so, subject to the following conditions:
21 * The above copyright notice and this permission notice shall be included in
22 * all copies or substantial portions of the Software.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
27 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
28 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
29 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
33 #include "qemu/osdep.h"
34 #include "sysemu/block-backend.h"
35 #include "sysemu/blockdev.h"
36 #include "hw/block/block.h"
37 #include "block/blockjob.h"
38 #include "block/qdict.h"
39 #include "block/throttle-groups.h"
40 #include "monitor/monitor.h"
41 #include "qemu/error-report.h"
42 #include "qemu/option.h"
43 #include "qemu/config-file.h"
44 #include "qapi/qapi-commands-block.h"
45 #include "qapi/qapi-commands-transaction.h"
46 #include "qapi/qapi-visit-block-core.h"
47 #include "qapi/qmp/qdict.h"
48 #include "qapi/qmp/qnum.h"
49 #include "qapi/qmp/qstring.h"
50 #include "qapi/error.h"
51 #include "qapi/qmp/qerror.h"
52 #include "qapi/qmp/qlist.h"
53 #include "qapi/qobject-output-visitor.h"
54 #include "sysemu/sysemu.h"
55 #include "sysemu/iothread.h"
56 #include "block/block_int.h"
57 #include "block/trace.h"
58 #include "sysemu/arch_init.h"
59 #include "sysemu/qtest.h"
60 #include "qemu/cutils.h"
61 #include "qemu/help_option.h"
62 #include "qemu/throttle-options.h"
64 static QTAILQ_HEAD(, BlockDriverState
) monitor_bdrv_states
=
65 QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states
);
67 static int do_open_tray(const char *blk_name
, const char *qdev_id
,
68 bool force
, Error
**errp
);
69 static void blockdev_remove_medium(bool has_device
, const char *device
,
70 bool has_id
, const char *id
, Error
**errp
);
71 static void blockdev_insert_medium(bool has_device
, const char *device
,
72 bool has_id
, const char *id
,
73 const char *node_name
, Error
**errp
);
75 static const char *const if_name
[IF_COUNT
] = {
79 [IF_FLOPPY
] = "floppy",
80 [IF_PFLASH
] = "pflash",
83 [IF_VIRTIO
] = "virtio",
87 static int if_max_devs
[IF_COUNT
] = {
89 * Do not change these numbers! They govern how drive option
90 * index maps to unit and bus. That mapping is ABI.
92 * All controllers used to implement if=T drives need to support
93 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
94 * Otherwise, some index values map to "impossible" bus, unit
97 * For instance, if you change [IF_SCSI] to 255, -drive
98 * if=scsi,index=12 no longer means bus=1,unit=5, but
99 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
100 * the drive can't be set up. Regression.
107 * Boards may call this to offer board-by-board overrides
108 * of the default, global values.
110 void override_max_devs(BlockInterfaceType type
, int max_devs
)
119 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
120 dinfo
= blk_legacy_dinfo(blk
);
121 if (dinfo
->type
== type
) {
122 fprintf(stderr
, "Cannot override units-per-bus property of"
123 " the %s interface, because a drive of that type has"
124 " already been added.\n", if_name
[type
]);
125 g_assert_not_reached();
129 if_max_devs
[type
] = max_devs
;
133 * We automatically delete the drive when a device using it gets
134 * unplugged. Questionable feature, but we can't just drop it.
135 * Device models call blockdev_mark_auto_del() to schedule the
136 * automatic deletion, and generic qdev code calls blockdev_auto_del()
137 * when deletion is actually safe.
139 void blockdev_mark_auto_del(BlockBackend
*blk
)
141 DriveInfo
*dinfo
= blk_legacy_dinfo(blk
);
142 BlockDriverState
*bs
= blk_bs(blk
);
143 AioContext
*aio_context
;
150 aio_context
= bdrv_get_aio_context(bs
);
151 aio_context_acquire(aio_context
);
154 job_cancel(&bs
->job
->job
, false);
157 aio_context_release(aio_context
);
163 void blockdev_auto_del(BlockBackend
*blk
)
165 DriveInfo
*dinfo
= blk_legacy_dinfo(blk
);
167 if (dinfo
&& dinfo
->auto_del
) {
168 monitor_remove_blk(blk
);
174 * Returns the current mapping of how many units per bus
175 * a particular interface can support.
177 * A positive integer indicates n units per bus.
178 * 0 implies the mapping has not been established.
179 * -1 indicates an invalid BlockInterfaceType was given.
181 int drive_get_max_devs(BlockInterfaceType type
)
183 if (type
>= IF_IDE
&& type
< IF_COUNT
) {
184 return if_max_devs
[type
];
190 static int drive_index_to_bus_id(BlockInterfaceType type
, int index
)
192 int max_devs
= if_max_devs
[type
];
193 return max_devs
? index
/ max_devs
: 0;
196 static int drive_index_to_unit_id(BlockInterfaceType type
, int index
)
198 int max_devs
= if_max_devs
[type
];
199 return max_devs
? index
% max_devs
: index
;
202 QemuOpts
*drive_def(const char *optstr
)
204 return qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr
, false);
207 QemuOpts
*drive_add(BlockInterfaceType type
, int index
, const char *file
,
212 opts
= drive_def(optstr
);
216 if (type
!= IF_DEFAULT
) {
217 qemu_opt_set(opts
, "if", if_name
[type
], &error_abort
);
220 qemu_opt_set_number(opts
, "index", index
, &error_abort
);
223 qemu_opt_set(opts
, "file", file
, &error_abort
);
227 DriveInfo
*drive_get(BlockInterfaceType type
, int bus
, int unit
)
232 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
233 dinfo
= blk_legacy_dinfo(blk
);
234 if (dinfo
&& dinfo
->type
== type
235 && dinfo
->bus
== bus
&& dinfo
->unit
== unit
) {
243 void drive_check_orphaned(void)
248 bool orphans
= false;
250 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
251 dinfo
= blk_legacy_dinfo(blk
);
252 if (!blk_get_attached_dev(blk
) && !dinfo
->is_default
&&
253 dinfo
->type
!= IF_NONE
) {
255 qemu_opts_loc_restore(dinfo
->opts
);
256 error_report("machine type does not support"
257 " if=%s,bus=%d,unit=%d",
258 if_name
[dinfo
->type
], dinfo
->bus
, dinfo
->unit
);
269 DriveInfo
*drive_get_by_index(BlockInterfaceType type
, int index
)
271 return drive_get(type
,
272 drive_index_to_bus_id(type
, index
),
273 drive_index_to_unit_id(type
, index
));
276 int drive_get_max_bus(BlockInterfaceType type
)
283 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
284 dinfo
= blk_legacy_dinfo(blk
);
285 if (dinfo
&& dinfo
->type
== type
&& dinfo
->bus
> max_bus
) {
286 max_bus
= dinfo
->bus
;
292 /* Get a block device. This should only be used for single-drive devices
293 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
295 DriveInfo
*drive_get_next(BlockInterfaceType type
)
297 static int next_block_unit
[IF_COUNT
];
299 return drive_get(type
, 0, next_block_unit
[type
]++);
302 static void bdrv_format_print(void *opaque
, const char *name
)
304 error_printf(" %s", name
);
309 BlockDriverState
*bs
;
312 static int parse_block_error_action(const char *buf
, bool is_read
, Error
**errp
)
314 if (!strcmp(buf
, "ignore")) {
315 return BLOCKDEV_ON_ERROR_IGNORE
;
316 } else if (!is_read
&& !strcmp(buf
, "enospc")) {
317 return BLOCKDEV_ON_ERROR_ENOSPC
;
318 } else if (!strcmp(buf
, "stop")) {
319 return BLOCKDEV_ON_ERROR_STOP
;
320 } else if (!strcmp(buf
, "report")) {
321 return BLOCKDEV_ON_ERROR_REPORT
;
323 error_setg(errp
, "'%s' invalid %s error action",
324 buf
, is_read
? "read" : "write");
329 static bool parse_stats_intervals(BlockAcctStats
*stats
, QList
*intervals
,
332 const QListEntry
*entry
;
333 for (entry
= qlist_first(intervals
); entry
; entry
= qlist_next(entry
)) {
334 switch (qobject_type(entry
->value
)) {
336 case QTYPE_QSTRING
: {
337 unsigned long long length
;
338 const char *str
= qstring_get_str(qobject_to(QString
,
340 if (parse_uint_full(str
, &length
, 10) == 0 &&
341 length
> 0 && length
<= UINT_MAX
) {
342 block_acct_add_interval(stats
, (unsigned) length
);
344 error_setg(errp
, "Invalid interval length: %s", str
);
351 int64_t length
= qnum_get_int(qobject_to(QNum
, entry
->value
));
353 if (length
> 0 && length
<= UINT_MAX
) {
354 block_acct_add_interval(stats
, (unsigned) length
);
356 error_setg(errp
, "Invalid interval length: %" PRId64
, length
);
363 error_setg(errp
, "The specification of stats-intervals is invalid");
370 typedef enum { MEDIA_DISK
, MEDIA_CDROM
} DriveMediaType
;
372 /* All parameters but @opts are optional and may be set to NULL. */
373 static void extract_common_blockdev_options(QemuOpts
*opts
, int *bdrv_flags
,
374 const char **throttling_group
, ThrottleConfig
*throttle_cfg
,
375 BlockdevDetectZeroesOptions
*detect_zeroes
, Error
**errp
)
377 Error
*local_error
= NULL
;
381 if (qemu_opt_get_bool(opts
, "copy-on-read", false)) {
382 *bdrv_flags
|= BDRV_O_COPY_ON_READ
;
385 if ((aio
= qemu_opt_get(opts
, "aio")) != NULL
) {
386 if (!strcmp(aio
, "native")) {
387 *bdrv_flags
|= BDRV_O_NATIVE_AIO
;
388 } else if (!strcmp(aio
, "threads")) {
389 /* this is the default */
391 error_setg(errp
, "invalid aio option");
397 /* disk I/O throttling */
398 if (throttling_group
) {
399 *throttling_group
= qemu_opt_get(opts
, "throttling.group");
403 throttle_config_init(throttle_cfg
);
404 throttle_cfg
->buckets
[THROTTLE_BPS_TOTAL
].avg
=
405 qemu_opt_get_number(opts
, "throttling.bps-total", 0);
406 throttle_cfg
->buckets
[THROTTLE_BPS_READ
].avg
=
407 qemu_opt_get_number(opts
, "throttling.bps-read", 0);
408 throttle_cfg
->buckets
[THROTTLE_BPS_WRITE
].avg
=
409 qemu_opt_get_number(opts
, "throttling.bps-write", 0);
410 throttle_cfg
->buckets
[THROTTLE_OPS_TOTAL
].avg
=
411 qemu_opt_get_number(opts
, "throttling.iops-total", 0);
412 throttle_cfg
->buckets
[THROTTLE_OPS_READ
].avg
=
413 qemu_opt_get_number(opts
, "throttling.iops-read", 0);
414 throttle_cfg
->buckets
[THROTTLE_OPS_WRITE
].avg
=
415 qemu_opt_get_number(opts
, "throttling.iops-write", 0);
417 throttle_cfg
->buckets
[THROTTLE_BPS_TOTAL
].max
=
418 qemu_opt_get_number(opts
, "throttling.bps-total-max", 0);
419 throttle_cfg
->buckets
[THROTTLE_BPS_READ
].max
=
420 qemu_opt_get_number(opts
, "throttling.bps-read-max", 0);
421 throttle_cfg
->buckets
[THROTTLE_BPS_WRITE
].max
=
422 qemu_opt_get_number(opts
, "throttling.bps-write-max", 0);
423 throttle_cfg
->buckets
[THROTTLE_OPS_TOTAL
].max
=
424 qemu_opt_get_number(opts
, "throttling.iops-total-max", 0);
425 throttle_cfg
->buckets
[THROTTLE_OPS_READ
].max
=
426 qemu_opt_get_number(opts
, "throttling.iops-read-max", 0);
427 throttle_cfg
->buckets
[THROTTLE_OPS_WRITE
].max
=
428 qemu_opt_get_number(opts
, "throttling.iops-write-max", 0);
430 throttle_cfg
->buckets
[THROTTLE_BPS_TOTAL
].burst_length
=
431 qemu_opt_get_number(opts
, "throttling.bps-total-max-length", 1);
432 throttle_cfg
->buckets
[THROTTLE_BPS_READ
].burst_length
=
433 qemu_opt_get_number(opts
, "throttling.bps-read-max-length", 1);
434 throttle_cfg
->buckets
[THROTTLE_BPS_WRITE
].burst_length
=
435 qemu_opt_get_number(opts
, "throttling.bps-write-max-length", 1);
436 throttle_cfg
->buckets
[THROTTLE_OPS_TOTAL
].burst_length
=
437 qemu_opt_get_number(opts
, "throttling.iops-total-max-length", 1);
438 throttle_cfg
->buckets
[THROTTLE_OPS_READ
].burst_length
=
439 qemu_opt_get_number(opts
, "throttling.iops-read-max-length", 1);
440 throttle_cfg
->buckets
[THROTTLE_OPS_WRITE
].burst_length
=
441 qemu_opt_get_number(opts
, "throttling.iops-write-max-length", 1);
443 throttle_cfg
->op_size
=
444 qemu_opt_get_number(opts
, "throttling.iops-size", 0);
446 if (!throttle_is_valid(throttle_cfg
, errp
)) {
453 qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup
,
454 qemu_opt_get(opts
, "detect-zeroes"),
455 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF
,
458 error_propagate(errp
, local_error
);
464 /* Takes the ownership of bs_opts */
465 static BlockBackend
*blockdev_init(const char *file
, QDict
*bs_opts
,
470 int on_read_error
, on_write_error
;
471 bool account_invalid
, account_failed
;
472 bool writethrough
, read_only
;
474 BlockDriverState
*bs
;
479 QDict
*interval_dict
= NULL
;
480 QList
*interval_list
= NULL
;
482 BlockdevDetectZeroesOptions detect_zeroes
=
483 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF
;
484 const char *throttling_group
= NULL
;
486 /* Check common options by copying from bs_opts to opts, all other options
487 * stay in bs_opts for processing by bdrv_open(). */
488 id
= qdict_get_try_str(bs_opts
, "id");
489 opts
= qemu_opts_create(&qemu_common_drive_opts
, id
, 1, &error
);
491 error_propagate(errp
, error
);
495 qemu_opts_absorb_qdict(opts
, bs_opts
, &error
);
497 error_propagate(errp
, error
);
502 qdict_del(bs_opts
, "id");
505 /* extract parameters */
506 snapshot
= qemu_opt_get_bool(opts
, "snapshot", 0);
508 account_invalid
= qemu_opt_get_bool(opts
, "stats-account-invalid", true);
509 account_failed
= qemu_opt_get_bool(opts
, "stats-account-failed", true);
511 writethrough
= !qemu_opt_get_bool(opts
, BDRV_OPT_CACHE_WB
, true);
513 id
= qemu_opts_id(opts
);
515 qdict_extract_subqdict(bs_opts
, &interval_dict
, "stats-intervals.");
516 qdict_array_split(interval_dict
, &interval_list
);
518 if (qdict_size(interval_dict
) != 0) {
519 error_setg(errp
, "Invalid option stats-intervals.%s",
520 qdict_first(interval_dict
)->key
);
524 extract_common_blockdev_options(opts
, &bdrv_flags
, &throttling_group
, &cfg
,
525 &detect_zeroes
, &error
);
527 error_propagate(errp
, error
);
531 if ((buf
= qemu_opt_get(opts
, "format")) != NULL
) {
532 if (is_help_option(buf
)) {
533 error_printf("Supported formats:");
534 bdrv_iterate_format(bdrv_format_print
, NULL
, false);
535 error_printf("\nSupported formats (read-only):");
536 bdrv_iterate_format(bdrv_format_print
, NULL
, true);
541 if (qdict_haskey(bs_opts
, "driver")) {
542 error_setg(errp
, "Cannot specify both 'driver' and 'format'");
545 qdict_put_str(bs_opts
, "driver", buf
);
548 on_write_error
= BLOCKDEV_ON_ERROR_ENOSPC
;
549 if ((buf
= qemu_opt_get(opts
, "werror")) != NULL
) {
550 on_write_error
= parse_block_error_action(buf
, 0, &error
);
552 error_propagate(errp
, error
);
557 on_read_error
= BLOCKDEV_ON_ERROR_REPORT
;
558 if ((buf
= qemu_opt_get(opts
, "rerror")) != NULL
) {
559 on_read_error
= parse_block_error_action(buf
, 1, &error
);
561 error_propagate(errp
, error
);
567 bdrv_flags
|= BDRV_O_SNAPSHOT
;
570 read_only
= qemu_opt_get_bool(opts
, BDRV_OPT_READ_ONLY
, false);
573 if ((!file
|| !*file
) && !qdict_size(bs_opts
)) {
574 BlockBackendRootState
*blk_rs
;
576 blk
= blk_new(0, BLK_PERM_ALL
);
577 blk_rs
= blk_get_root_state(blk
);
578 blk_rs
->open_flags
= bdrv_flags
;
579 blk_rs
->read_only
= read_only
;
580 blk_rs
->detect_zeroes
= detect_zeroes
;
582 qobject_unref(bs_opts
);
584 if (file
&& !*file
) {
588 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
589 * with other callers) rather than what we want as the real defaults.
590 * Apply the defaults here instead. */
591 qdict_set_default_str(bs_opts
, BDRV_OPT_CACHE_DIRECT
, "off");
592 qdict_set_default_str(bs_opts
, BDRV_OPT_CACHE_NO_FLUSH
, "off");
593 qdict_set_default_str(bs_opts
, BDRV_OPT_READ_ONLY
,
594 read_only
? "on" : "off");
595 qdict_set_default_str(bs_opts
, BDRV_OPT_AUTO_READ_ONLY
, "on");
596 assert((bdrv_flags
& BDRV_O_CACHE_MASK
) == 0);
598 if (runstate_check(RUN_STATE_INMIGRATE
)) {
599 bdrv_flags
|= BDRV_O_INACTIVE
;
602 blk
= blk_new_open(file
, NULL
, bs_opts
, bdrv_flags
, errp
);
608 bs
->detect_zeroes
= detect_zeroes
;
610 block_acct_setup(blk_get_stats(blk
), account_invalid
, account_failed
);
612 if (!parse_stats_intervals(blk_get_stats(blk
), interval_list
, errp
)) {
619 /* disk I/O throttling */
620 if (throttle_enabled(&cfg
)) {
621 if (!throttling_group
) {
622 throttling_group
= id
;
624 blk_io_limits_enable(blk
, throttling_group
);
625 blk_set_io_limits(blk
, &cfg
);
628 blk_set_enable_write_cache(blk
, !writethrough
);
629 blk_set_on_error(blk
, on_read_error
, on_write_error
);
631 if (!monitor_add_blk(blk
, id
, errp
)) {
639 qobject_unref(interval_dict
);
640 qobject_unref(interval_list
);
645 qobject_unref(interval_dict
);
646 qobject_unref(interval_list
);
648 qobject_unref(bs_opts
);
652 /* Takes the ownership of bs_opts */
653 static BlockDriverState
*bds_tree_init(QDict
*bs_opts
, Error
**errp
)
657 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
658 * with other callers) rather than what we want as the real defaults.
659 * Apply the defaults here instead. */
660 qdict_set_default_str(bs_opts
, BDRV_OPT_CACHE_DIRECT
, "off");
661 qdict_set_default_str(bs_opts
, BDRV_OPT_CACHE_NO_FLUSH
, "off");
662 qdict_set_default_str(bs_opts
, BDRV_OPT_READ_ONLY
, "off");
664 if (runstate_check(RUN_STATE_INMIGRATE
)) {
665 bdrv_flags
|= BDRV_O_INACTIVE
;
668 return bdrv_open(NULL
, NULL
, bs_opts
, bdrv_flags
, errp
);
671 void blockdev_close_all_bdrv_states(void)
673 BlockDriverState
*bs
, *next_bs
;
675 QTAILQ_FOREACH_SAFE(bs
, &monitor_bdrv_states
, monitor_list
, next_bs
) {
676 AioContext
*ctx
= bdrv_get_aio_context(bs
);
678 aio_context_acquire(ctx
);
680 aio_context_release(ctx
);
684 /* Iterates over the list of monitor-owned BlockDriverStates */
685 BlockDriverState
*bdrv_next_monitor_owned(BlockDriverState
*bs
)
687 return bs
? QTAILQ_NEXT(bs
, monitor_list
)
688 : QTAILQ_FIRST(&monitor_bdrv_states
);
691 static void qemu_opt_rename(QemuOpts
*opts
, const char *from
, const char *to
,
696 value
= qemu_opt_get(opts
, from
);
698 if (qemu_opt_find(opts
, to
)) {
699 error_setg(errp
, "'%s' and its alias '%s' can't be used at the "
700 "same time", to
, from
);
705 /* rename all items in opts */
706 while ((value
= qemu_opt_get(opts
, from
))) {
707 qemu_opt_set(opts
, to
, value
, &error_abort
);
708 qemu_opt_unset(opts
, from
);
712 QemuOptsList qemu_legacy_drive_opts
= {
714 .head
= QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts
.head
),
718 .type
= QEMU_OPT_NUMBER
,
719 .help
= "bus number",
722 .type
= QEMU_OPT_NUMBER
,
723 .help
= "unit number (i.e. lun for scsi)",
726 .type
= QEMU_OPT_NUMBER
,
727 .help
= "index number",
730 .type
= QEMU_OPT_STRING
,
731 .help
= "media type (disk, cdrom)",
734 .type
= QEMU_OPT_STRING
,
735 .help
= "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
738 .type
= QEMU_OPT_STRING
,
742 /* Options that are passed on, but have special semantics with -drive */
744 .name
= BDRV_OPT_READ_ONLY
,
745 .type
= QEMU_OPT_BOOL
,
746 .help
= "open drive file as read-only",
749 .type
= QEMU_OPT_STRING
,
750 .help
= "read error action",
753 .type
= QEMU_OPT_STRING
,
754 .help
= "write error action",
756 .name
= "copy-on-read",
757 .type
= QEMU_OPT_BOOL
,
758 .help
= "copy read data from backing file into image file",
761 { /* end of list */ }
765 DriveInfo
*drive_new(QemuOpts
*all_opts
, BlockInterfaceType block_default_type
,
770 DriveInfo
*dinfo
= NULL
;
772 QemuOpts
*legacy_opts
;
773 DriveMediaType media
= MEDIA_DISK
;
774 BlockInterfaceType type
;
775 int max_devs
, bus_id
, unit_id
, index
;
776 const char *werror
, *rerror
;
777 bool read_only
= false;
779 const char *filename
;
780 Error
*local_err
= NULL
;
783 /* Change legacy command line options into QMP ones */
784 static const struct {
788 { "iops", "throttling.iops-total" },
789 { "iops_rd", "throttling.iops-read" },
790 { "iops_wr", "throttling.iops-write" },
792 { "bps", "throttling.bps-total" },
793 { "bps_rd", "throttling.bps-read" },
794 { "bps_wr", "throttling.bps-write" },
796 { "iops_max", "throttling.iops-total-max" },
797 { "iops_rd_max", "throttling.iops-read-max" },
798 { "iops_wr_max", "throttling.iops-write-max" },
800 { "bps_max", "throttling.bps-total-max" },
801 { "bps_rd_max", "throttling.bps-read-max" },
802 { "bps_wr_max", "throttling.bps-write-max" },
804 { "iops_size", "throttling.iops-size" },
806 { "group", "throttling.group" },
808 { "readonly", BDRV_OPT_READ_ONLY
},
811 for (i
= 0; i
< ARRAY_SIZE(opt_renames
); i
++) {
812 qemu_opt_rename(all_opts
, opt_renames
[i
].from
, opt_renames
[i
].to
,
815 error_propagate(errp
, local_err
);
820 value
= qemu_opt_get(all_opts
, "cache");
825 if (bdrv_parse_cache_mode(value
, &flags
, &writethrough
) != 0) {
826 error_setg(errp
, "invalid cache option");
830 /* Specific options take precedence */
831 if (!qemu_opt_get(all_opts
, BDRV_OPT_CACHE_WB
)) {
832 qemu_opt_set_bool(all_opts
, BDRV_OPT_CACHE_WB
,
833 !writethrough
, &error_abort
);
835 if (!qemu_opt_get(all_opts
, BDRV_OPT_CACHE_DIRECT
)) {
836 qemu_opt_set_bool(all_opts
, BDRV_OPT_CACHE_DIRECT
,
837 !!(flags
& BDRV_O_NOCACHE
), &error_abort
);
839 if (!qemu_opt_get(all_opts
, BDRV_OPT_CACHE_NO_FLUSH
)) {
840 qemu_opt_set_bool(all_opts
, BDRV_OPT_CACHE_NO_FLUSH
,
841 !!(flags
& BDRV_O_NO_FLUSH
), &error_abort
);
843 qemu_opt_unset(all_opts
, "cache");
846 /* Get a QDict for processing the options */
847 bs_opts
= qdict_new();
848 qemu_opts_to_qdict(all_opts
, bs_opts
);
850 legacy_opts
= qemu_opts_create(&qemu_legacy_drive_opts
, NULL
, 0,
852 qemu_opts_absorb_qdict(legacy_opts
, bs_opts
, &local_err
);
854 error_propagate(errp
, local_err
);
859 value
= qemu_opt_get(legacy_opts
, "media");
861 if (!strcmp(value
, "disk")) {
863 } else if (!strcmp(value
, "cdrom")) {
867 error_setg(errp
, "'%s' invalid media", value
);
872 /* copy-on-read is disabled with a warning for read-only devices */
873 read_only
|= qemu_opt_get_bool(legacy_opts
, BDRV_OPT_READ_ONLY
, false);
874 copy_on_read
= qemu_opt_get_bool(legacy_opts
, "copy-on-read", false);
876 if (read_only
&& copy_on_read
) {
877 warn_report("disabling copy-on-read on read-only drive");
878 copy_on_read
= false;
881 qdict_put_str(bs_opts
, BDRV_OPT_READ_ONLY
, read_only
? "on" : "off");
882 qdict_put_str(bs_opts
, "copy-on-read", copy_on_read
? "on" : "off");
884 /* Controller type */
885 value
= qemu_opt_get(legacy_opts
, "if");
888 type
< IF_COUNT
&& strcmp(value
, if_name
[type
]);
891 if (type
== IF_COUNT
) {
892 error_setg(errp
, "unsupported bus type '%s'", value
);
896 type
= block_default_type
;
899 /* Device address specified by bus/unit or index.
900 * If none was specified, try to find the first free one. */
901 bus_id
= qemu_opt_get_number(legacy_opts
, "bus", 0);
902 unit_id
= qemu_opt_get_number(legacy_opts
, "unit", -1);
903 index
= qemu_opt_get_number(legacy_opts
, "index", -1);
905 max_devs
= if_max_devs
[type
];
908 if (bus_id
!= 0 || unit_id
!= -1) {
909 error_setg(errp
, "index cannot be used with bus and unit");
912 bus_id
= drive_index_to_bus_id(type
, index
);
913 unit_id
= drive_index_to_unit_id(type
, index
);
918 while (drive_get(type
, bus_id
, unit_id
) != NULL
) {
920 if (max_devs
&& unit_id
>= max_devs
) {
927 if (max_devs
&& unit_id
>= max_devs
) {
928 error_setg(errp
, "unit %d too big (max is %d)", unit_id
, max_devs
- 1);
932 if (drive_get(type
, bus_id
, unit_id
) != NULL
) {
933 error_setg(errp
, "drive with bus=%d, unit=%d (index=%d) exists",
934 bus_id
, unit_id
, index
);
938 /* no id supplied -> create one */
939 if (qemu_opts_id(all_opts
) == NULL
) {
941 const char *mediastr
= "";
942 if (type
== IF_IDE
|| type
== IF_SCSI
) {
943 mediastr
= (media
== MEDIA_CDROM
) ? "-cd" : "-hd";
946 new_id
= g_strdup_printf("%s%i%s%i", if_name
[type
], bus_id
,
949 new_id
= g_strdup_printf("%s%s%i", if_name
[type
],
952 qdict_put_str(bs_opts
, "id", new_id
);
956 /* Add virtio block device */
957 if (type
== IF_VIRTIO
) {
959 devopts
= qemu_opts_create(qemu_find_opts("device"), NULL
, 0,
961 if (arch_type
== QEMU_ARCH_S390X
) {
962 qemu_opt_set(devopts
, "driver", "virtio-blk-ccw", &error_abort
);
964 qemu_opt_set(devopts
, "driver", "virtio-blk-pci", &error_abort
);
966 qemu_opt_set(devopts
, "drive", qdict_get_str(bs_opts
, "id"),
970 filename
= qemu_opt_get(legacy_opts
, "file");
972 /* Check werror/rerror compatibility with if=... */
973 werror
= qemu_opt_get(legacy_opts
, "werror");
974 if (werror
!= NULL
) {
975 if (type
!= IF_IDE
&& type
!= IF_SCSI
&& type
!= IF_VIRTIO
&&
977 error_setg(errp
, "werror is not supported by this bus type");
980 qdict_put_str(bs_opts
, "werror", werror
);
983 rerror
= qemu_opt_get(legacy_opts
, "rerror");
984 if (rerror
!= NULL
) {
985 if (type
!= IF_IDE
&& type
!= IF_VIRTIO
&& type
!= IF_SCSI
&&
987 error_setg(errp
, "rerror is not supported by this bus type");
990 qdict_put_str(bs_opts
, "rerror", rerror
);
993 /* Actual block device init: Functionality shared with blockdev-add */
994 blk
= blockdev_init(filename
, bs_opts
, &local_err
);
997 error_propagate(errp
, local_err
);
1003 /* Create legacy DriveInfo */
1004 dinfo
= g_malloc0(sizeof(*dinfo
));
1005 dinfo
->opts
= all_opts
;
1008 dinfo
->bus
= bus_id
;
1009 dinfo
->unit
= unit_id
;
1011 blk_set_legacy_dinfo(blk
, dinfo
);
1018 dinfo
->media_cd
= media
== MEDIA_CDROM
;
1025 qemu_opts_del(legacy_opts
);
1026 qobject_unref(bs_opts
);
1030 static BlockDriverState
*qmp_get_root_bs(const char *name
, Error
**errp
)
1032 BlockDriverState
*bs
;
1034 bs
= bdrv_lookup_bs(name
, name
, errp
);
1039 if (!bdrv_is_root_node(bs
)) {
1040 error_setg(errp
, "Need a root block node");
1044 if (!bdrv_is_inserted(bs
)) {
1045 error_setg(errp
, "Device has no medium");
1052 static BlockBackend
*qmp_get_blk(const char *blk_name
, const char *qdev_id
,
1057 if (!blk_name
== !qdev_id
) {
1058 error_setg(errp
, "Need exactly one of 'device' and 'id'");
1063 blk
= blk_by_qdev_id(qdev_id
, errp
);
1065 blk
= blk_by_name(blk_name
);
1067 error_set(errp
, ERROR_CLASS_DEVICE_NOT_FOUND
,
1068 "Device '%s' not found", blk_name
);
1075 void hmp_commit(Monitor
*mon
, const QDict
*qdict
)
1077 const char *device
= qdict_get_str(qdict
, "device");
1081 if (!strcmp(device
, "all")) {
1082 ret
= blk_commit_all();
1084 BlockDriverState
*bs
;
1085 AioContext
*aio_context
;
1087 blk
= blk_by_name(device
);
1089 monitor_printf(mon
, "Device '%s' not found\n", device
);
1092 if (!blk_is_available(blk
)) {
1093 monitor_printf(mon
, "Device '%s' has no medium\n", device
);
1098 aio_context
= bdrv_get_aio_context(bs
);
1099 aio_context_acquire(aio_context
);
1101 ret
= bdrv_commit(bs
);
1103 aio_context_release(aio_context
);
1106 monitor_printf(mon
, "'commit' error for '%s': %s\n", device
,
1111 static void blockdev_do_action(TransactionAction
*action
, Error
**errp
)
1113 TransactionActionList list
;
1115 list
.value
= action
;
1117 qmp_transaction(&list
, false, NULL
, errp
);
1120 void qmp_blockdev_snapshot_sync(bool has_device
, const char *device
,
1121 bool has_node_name
, const char *node_name
,
1122 const char *snapshot_file
,
1123 bool has_snapshot_node_name
,
1124 const char *snapshot_node_name
,
1125 bool has_format
, const char *format
,
1126 bool has_mode
, NewImageMode mode
, Error
**errp
)
1128 BlockdevSnapshotSync snapshot
= {
1129 .has_device
= has_device
,
1130 .device
= (char *) device
,
1131 .has_node_name
= has_node_name
,
1132 .node_name
= (char *) node_name
,
1133 .snapshot_file
= (char *) snapshot_file
,
1134 .has_snapshot_node_name
= has_snapshot_node_name
,
1135 .snapshot_node_name
= (char *) snapshot_node_name
,
1136 .has_format
= has_format
,
1137 .format
= (char *) format
,
1138 .has_mode
= has_mode
,
1141 TransactionAction action
= {
1142 .type
= TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
,
1143 .u
.blockdev_snapshot_sync
.data
= &snapshot
,
1145 blockdev_do_action(&action
, errp
);
1148 void qmp_blockdev_snapshot(const char *node
, const char *overlay
,
1151 BlockdevSnapshot snapshot_data
= {
1152 .node
= (char *) node
,
1153 .overlay
= (char *) overlay
1155 TransactionAction action
= {
1156 .type
= TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT
,
1157 .u
.blockdev_snapshot
.data
= &snapshot_data
,
1159 blockdev_do_action(&action
, errp
);
1162 void qmp_blockdev_snapshot_internal_sync(const char *device
,
1166 BlockdevSnapshotInternal snapshot
= {
1167 .device
= (char *) device
,
1168 .name
= (char *) name
1170 TransactionAction action
= {
1171 .type
= TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
,
1172 .u
.blockdev_snapshot_internal_sync
.data
= &snapshot
,
1174 blockdev_do_action(&action
, errp
);
1177 SnapshotInfo
*qmp_blockdev_snapshot_delete_internal_sync(const char *device
,
1184 BlockDriverState
*bs
;
1185 AioContext
*aio_context
;
1186 QEMUSnapshotInfo sn
;
1187 Error
*local_err
= NULL
;
1188 SnapshotInfo
*info
= NULL
;
1191 bs
= qmp_get_root_bs(device
, errp
);
1195 aio_context
= bdrv_get_aio_context(bs
);
1196 aio_context_acquire(aio_context
);
1207 error_setg(errp
, "Name or id must be provided");
1208 goto out_aio_context
;
1211 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE
, errp
)) {
1212 goto out_aio_context
;
1215 ret
= bdrv_snapshot_find_by_id_and_name(bs
, id
, name
, &sn
, &local_err
);
1217 error_propagate(errp
, local_err
);
1218 goto out_aio_context
;
1222 "Snapshot with id '%s' and name '%s' does not exist on "
1224 STR_OR_NULL(id
), STR_OR_NULL(name
), device
);
1225 goto out_aio_context
;
1228 bdrv_snapshot_delete(bs
, id
, name
, &local_err
);
1230 error_propagate(errp
, local_err
);
1231 goto out_aio_context
;
1234 aio_context_release(aio_context
);
1236 info
= g_new0(SnapshotInfo
, 1);
1237 info
->id
= g_strdup(sn
.id_str
);
1238 info
->name
= g_strdup(sn
.name
);
1239 info
->date_nsec
= sn
.date_nsec
;
1240 info
->date_sec
= sn
.date_sec
;
1241 info
->vm_state_size
= sn
.vm_state_size
;
1242 info
->vm_clock_nsec
= sn
.vm_clock_nsec
% 1000000000;
1243 info
->vm_clock_sec
= sn
.vm_clock_nsec
/ 1000000000;
1248 aio_context_release(aio_context
);
1253 * block_dirty_bitmap_lookup:
1254 * Return a dirty bitmap (if present), after validating
1255 * the node reference and bitmap names.
1257 * @node: The name of the BDS node to search for bitmaps
1258 * @name: The name of the bitmap to search for
1259 * @pbs: Output pointer for BDS lookup, if desired. Can be NULL.
1260 * @errp: Output pointer for error information. Can be NULL.
1262 * @return: A bitmap object on success, or NULL on failure.
1264 static BdrvDirtyBitmap
*block_dirty_bitmap_lookup(const char *node
,
1266 BlockDriverState
**pbs
,
1269 BlockDriverState
*bs
;
1270 BdrvDirtyBitmap
*bitmap
;
1273 error_setg(errp
, "Node cannot be NULL");
1277 error_setg(errp
, "Bitmap name cannot be NULL");
1280 bs
= bdrv_lookup_bs(node
, node
, NULL
);
1282 error_setg(errp
, "Node '%s' not found", node
);
1286 bitmap
= bdrv_find_dirty_bitmap(bs
, name
);
1288 error_setg(errp
, "Dirty bitmap '%s' not found", name
);
1299 /* New and old BlockDriverState structs for atomic group operations */
1301 typedef struct BlkActionState BlkActionState
;
1305 * Table of operations that define an Action.
1307 * @instance_size: Size of state struct, in bytes.
1308 * @prepare: Prepare the work, must NOT be NULL.
1309 * @commit: Commit the changes, can be NULL.
1310 * @abort: Abort the changes on fail, can be NULL.
1311 * @clean: Clean up resources after all transaction actions have called
1312 * commit() or abort(). Can be NULL.
1314 * Only prepare() may fail. In a single transaction, only one of commit() or
1315 * abort() will be called. clean() will always be called if it is present.
1317 typedef struct BlkActionOps
{
1318 size_t instance_size
;
1319 void (*prepare
)(BlkActionState
*common
, Error
**errp
);
1320 void (*commit
)(BlkActionState
*common
);
1321 void (*abort
)(BlkActionState
*common
);
1322 void (*clean
)(BlkActionState
*common
);
1327 * Describes one Action's state within a Transaction.
1329 * @action: QAPI-defined enum identifying which Action to perform.
1330 * @ops: Table of ActionOps this Action can perform.
1331 * @block_job_txn: Transaction which this action belongs to.
1332 * @entry: List membership for all Actions in this Transaction.
1334 * This structure must be arranged as first member in a subclassed type,
1335 * assuming that the compiler will also arrange it to the same offsets as the
1338 struct BlkActionState
{
1339 TransactionAction
*action
;
1340 const BlkActionOps
*ops
;
1341 JobTxn
*block_job_txn
;
1342 TransactionProperties
*txn_props
;
1343 QTAILQ_ENTRY(BlkActionState
) entry
;
1346 /* internal snapshot private data */
1347 typedef struct InternalSnapshotState
{
1348 BlkActionState common
;
1349 BlockDriverState
*bs
;
1350 QEMUSnapshotInfo sn
;
1352 } InternalSnapshotState
;
1355 static int action_check_completion_mode(BlkActionState
*s
, Error
**errp
)
1357 if (s
->txn_props
->completion_mode
!= ACTION_COMPLETION_MODE_INDIVIDUAL
) {
1359 "Action '%s' does not support Transaction property "
1360 "completion-mode = %s",
1361 TransactionActionKind_str(s
->action
->type
),
1362 ActionCompletionMode_str(s
->txn_props
->completion_mode
));
1368 static void internal_snapshot_prepare(BlkActionState
*common
,
1371 Error
*local_err
= NULL
;
1374 BlockDriverState
*bs
;
1375 QEMUSnapshotInfo old_sn
, *sn
;
1378 BlockdevSnapshotInternal
*internal
;
1379 InternalSnapshotState
*state
;
1380 AioContext
*aio_context
;
1383 g_assert(common
->action
->type
==
1384 TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
);
1385 internal
= common
->action
->u
.blockdev_snapshot_internal_sync
.data
;
1386 state
= DO_UPCAST(InternalSnapshotState
, common
, common
);
1388 /* 1. parse input */
1389 device
= internal
->device
;
1390 name
= internal
->name
;
1392 /* 2. check for validation */
1393 if (action_check_completion_mode(common
, errp
) < 0) {
1397 bs
= qmp_get_root_bs(device
, errp
);
1402 aio_context
= bdrv_get_aio_context(bs
);
1403 aio_context_acquire(aio_context
);
1407 /* Paired with .clean() */
1408 bdrv_drained_begin(bs
);
1410 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT
, errp
)) {
1414 if (bdrv_is_read_only(bs
)) {
1415 error_setg(errp
, "Device '%s' is read only", device
);
1419 if (!bdrv_can_snapshot(bs
)) {
1420 error_setg(errp
, "Block format '%s' used by device '%s' "
1421 "does not support internal snapshots",
1422 bs
->drv
->format_name
, device
);
1426 if (!strlen(name
)) {
1427 error_setg(errp
, "Name is empty");
1431 /* check whether a snapshot with name exist */
1432 ret
= bdrv_snapshot_find_by_id_and_name(bs
, NULL
, name
, &old_sn
,
1435 error_propagate(errp
, local_err
);
1439 "Snapshot with name '%s' already exists on device '%s'",
1444 /* 3. take the snapshot */
1446 pstrcpy(sn
->name
, sizeof(sn
->name
), name
);
1447 qemu_gettimeofday(&tv
);
1448 sn
->date_sec
= tv
.tv_sec
;
1449 sn
->date_nsec
= tv
.tv_usec
* 1000;
1450 sn
->vm_clock_nsec
= qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
);
1452 ret1
= bdrv_snapshot_create(bs
, sn
);
1454 error_setg_errno(errp
, -ret1
,
1455 "Failed to create snapshot '%s' on device '%s'",
1460 /* 4. succeed, mark a snapshot is created */
1461 state
->created
= true;
1464 aio_context_release(aio_context
);
1467 static void internal_snapshot_abort(BlkActionState
*common
)
1469 InternalSnapshotState
*state
=
1470 DO_UPCAST(InternalSnapshotState
, common
, common
);
1471 BlockDriverState
*bs
= state
->bs
;
1472 QEMUSnapshotInfo
*sn
= &state
->sn
;
1473 AioContext
*aio_context
;
1474 Error
*local_error
= NULL
;
1476 if (!state
->created
) {
1480 aio_context
= bdrv_get_aio_context(state
->bs
);
1481 aio_context_acquire(aio_context
);
1483 if (bdrv_snapshot_delete(bs
, sn
->id_str
, sn
->name
, &local_error
) < 0) {
1484 error_reportf_err(local_error
,
1485 "Failed to delete snapshot with id '%s' and "
1486 "name '%s' on device '%s' in abort: ",
1487 sn
->id_str
, sn
->name
,
1488 bdrv_get_device_name(bs
));
1491 aio_context_release(aio_context
);
1494 static void internal_snapshot_clean(BlkActionState
*common
)
1496 InternalSnapshotState
*state
= DO_UPCAST(InternalSnapshotState
,
1498 AioContext
*aio_context
;
1504 aio_context
= bdrv_get_aio_context(state
->bs
);
1505 aio_context_acquire(aio_context
);
1507 bdrv_drained_end(state
->bs
);
1509 aio_context_release(aio_context
);
1512 /* external snapshot private data */
1513 typedef struct ExternalSnapshotState
{
1514 BlkActionState common
;
1515 BlockDriverState
*old_bs
;
1516 BlockDriverState
*new_bs
;
1517 bool overlay_appended
;
1518 } ExternalSnapshotState
;
1520 static void external_snapshot_prepare(BlkActionState
*common
,
1524 QDict
*options
= NULL
;
1525 Error
*local_err
= NULL
;
1526 /* Device and node name of the image to generate the snapshot from */
1528 const char *node_name
;
1529 /* Reference to the new image (for 'blockdev-snapshot') */
1530 const char *snapshot_ref
;
1531 /* File name of the new image (for 'blockdev-snapshot-sync') */
1532 const char *new_image_file
;
1533 ExternalSnapshotState
*state
=
1534 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1535 TransactionAction
*action
= common
->action
;
1536 AioContext
*aio_context
;
1538 /* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar
1539 * purpose but a different set of parameters */
1540 switch (action
->type
) {
1541 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT
:
1543 BlockdevSnapshot
*s
= action
->u
.blockdev_snapshot
.data
;
1545 node_name
= s
->node
;
1546 new_image_file
= NULL
;
1547 snapshot_ref
= s
->overlay
;
1550 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
:
1552 BlockdevSnapshotSync
*s
= action
->u
.blockdev_snapshot_sync
.data
;
1553 device
= s
->has_device
? s
->device
: NULL
;
1554 node_name
= s
->has_node_name
? s
->node_name
: NULL
;
1555 new_image_file
= s
->snapshot_file
;
1556 snapshot_ref
= NULL
;
1560 g_assert_not_reached();
1563 /* start processing */
1564 if (action_check_completion_mode(common
, errp
) < 0) {
1568 state
->old_bs
= bdrv_lookup_bs(device
, node_name
, errp
);
1569 if (!state
->old_bs
) {
1573 aio_context
= bdrv_get_aio_context(state
->old_bs
);
1574 aio_context_acquire(aio_context
);
1576 /* Paired with .clean() */
1577 bdrv_drained_begin(state
->old_bs
);
1579 if (!bdrv_is_inserted(state
->old_bs
)) {
1580 error_setg(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
1584 if (bdrv_op_is_blocked(state
->old_bs
,
1585 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT
, errp
)) {
1589 if (!bdrv_is_read_only(state
->old_bs
)) {
1590 if (bdrv_flush(state
->old_bs
)) {
1591 error_setg(errp
, QERR_IO_ERROR
);
1596 if (!bdrv_is_first_non_filter(state
->old_bs
)) {
1597 error_setg(errp
, QERR_FEATURE_DISABLED
, "snapshot");
1601 if (action
->type
== TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
) {
1602 BlockdevSnapshotSync
*s
= action
->u
.blockdev_snapshot_sync
.data
;
1603 const char *format
= s
->has_format
? s
->format
: "qcow2";
1604 enum NewImageMode mode
;
1605 const char *snapshot_node_name
=
1606 s
->has_snapshot_node_name
? s
->snapshot_node_name
: NULL
;
1608 if (node_name
&& !snapshot_node_name
) {
1609 error_setg(errp
, "New snapshot node name missing");
1613 if (snapshot_node_name
&&
1614 bdrv_lookup_bs(snapshot_node_name
, snapshot_node_name
, NULL
)) {
1615 error_setg(errp
, "New snapshot node name already in use");
1619 flags
= state
->old_bs
->open_flags
;
1620 flags
&= ~(BDRV_O_SNAPSHOT
| BDRV_O_COPY_ON_READ
);
1621 flags
|= BDRV_O_NO_BACKING
;
1623 /* create new image w/backing file */
1624 mode
= s
->has_mode
? s
->mode
: NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
1625 if (mode
!= NEW_IMAGE_MODE_EXISTING
) {
1626 int64_t size
= bdrv_getlength(state
->old_bs
);
1628 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
1631 bdrv_refresh_filename(state
->old_bs
);
1632 bdrv_img_create(new_image_file
, format
,
1633 state
->old_bs
->filename
,
1634 state
->old_bs
->drv
->format_name
,
1635 NULL
, size
, flags
, false, &local_err
);
1637 error_propagate(errp
, local_err
);
1642 options
= qdict_new();
1643 if (snapshot_node_name
) {
1644 qdict_put_str(options
, "node-name", snapshot_node_name
);
1646 qdict_put_str(options
, "driver", format
);
1649 state
->new_bs
= bdrv_open(new_image_file
, snapshot_ref
, options
, flags
,
1651 /* We will manually add the backing_hd field to the bs later */
1652 if (!state
->new_bs
) {
1656 if (bdrv_has_blk(state
->new_bs
)) {
1657 error_setg(errp
, "The snapshot is already in use");
1661 if (bdrv_op_is_blocked(state
->new_bs
, BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT
,
1666 if (state
->new_bs
->backing
!= NULL
) {
1667 error_setg(errp
, "The snapshot already has a backing image");
1671 if (!state
->new_bs
->drv
->supports_backing
) {
1672 error_setg(errp
, "The snapshot does not support backing images");
1676 bdrv_set_aio_context(state
->new_bs
, aio_context
);
1678 /* This removes our old bs and adds the new bs. This is an operation that
1679 * can fail, so we need to do it in .prepare; undoing it for abort is
1680 * always possible. */
1681 bdrv_ref(state
->new_bs
);
1682 bdrv_append(state
->new_bs
, state
->old_bs
, &local_err
);
1684 error_propagate(errp
, local_err
);
1687 state
->overlay_appended
= true;
1690 aio_context_release(aio_context
);
1693 static void external_snapshot_commit(BlkActionState
*common
)
1695 ExternalSnapshotState
*state
=
1696 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1697 AioContext
*aio_context
;
1699 aio_context
= bdrv_get_aio_context(state
->old_bs
);
1700 aio_context_acquire(aio_context
);
1702 /* We don't need (or want) to use the transactional
1703 * bdrv_reopen_multiple() across all the entries at once, because we
1704 * don't want to abort all of them if one of them fails the reopen */
1705 if (!atomic_read(&state
->old_bs
->copy_on_read
)) {
1706 bdrv_reopen_set_read_only(state
->old_bs
, true, NULL
);
1709 aio_context_release(aio_context
);
1712 static void external_snapshot_abort(BlkActionState
*common
)
1714 ExternalSnapshotState
*state
=
1715 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1716 if (state
->new_bs
) {
1717 if (state
->overlay_appended
) {
1718 AioContext
*aio_context
;
1720 aio_context
= bdrv_get_aio_context(state
->old_bs
);
1721 aio_context_acquire(aio_context
);
1723 bdrv_ref(state
->old_bs
); /* we can't let bdrv_set_backind_hd()
1724 close state->old_bs; we need it */
1725 bdrv_set_backing_hd(state
->new_bs
, NULL
, &error_abort
);
1726 bdrv_replace_node(state
->new_bs
, state
->old_bs
, &error_abort
);
1727 bdrv_unref(state
->old_bs
); /* bdrv_replace_node() ref'ed old_bs */
1729 aio_context_release(aio_context
);
1734 static void external_snapshot_clean(BlkActionState
*common
)
1736 ExternalSnapshotState
*state
=
1737 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1738 AioContext
*aio_context
;
1740 if (!state
->old_bs
) {
1744 aio_context
= bdrv_get_aio_context(state
->old_bs
);
1745 aio_context_acquire(aio_context
);
1747 bdrv_drained_end(state
->old_bs
);
1748 bdrv_unref(state
->new_bs
);
1750 aio_context_release(aio_context
);
1753 typedef struct DriveBackupState
{
1754 BlkActionState common
;
1755 BlockDriverState
*bs
;
1759 static BlockJob
*do_drive_backup(DriveBackup
*backup
, JobTxn
*txn
,
1762 static void drive_backup_prepare(BlkActionState
*common
, Error
**errp
)
1764 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1765 BlockDriverState
*bs
;
1766 DriveBackup
*backup
;
1767 AioContext
*aio_context
;
1768 Error
*local_err
= NULL
;
1770 assert(common
->action
->type
== TRANSACTION_ACTION_KIND_DRIVE_BACKUP
);
1771 backup
= common
->action
->u
.drive_backup
.data
;
1773 bs
= qmp_get_root_bs(backup
->device
, errp
);
1778 aio_context
= bdrv_get_aio_context(bs
);
1779 aio_context_acquire(aio_context
);
1781 /* Paired with .clean() */
1782 bdrv_drained_begin(bs
);
1786 state
->job
= do_drive_backup(backup
, common
->block_job_txn
, &local_err
);
1788 error_propagate(errp
, local_err
);
1793 aio_context_release(aio_context
);
1796 static void drive_backup_commit(BlkActionState
*common
)
1798 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1799 AioContext
*aio_context
;
1801 aio_context
= bdrv_get_aio_context(state
->bs
);
1802 aio_context_acquire(aio_context
);
1805 job_start(&state
->job
->job
);
1807 aio_context_release(aio_context
);
1810 static void drive_backup_abort(BlkActionState
*common
)
1812 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1815 AioContext
*aio_context
;
1817 aio_context
= bdrv_get_aio_context(state
->bs
);
1818 aio_context_acquire(aio_context
);
1820 job_cancel_sync(&state
->job
->job
);
1822 aio_context_release(aio_context
);
1826 static void drive_backup_clean(BlkActionState
*common
)
1828 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1829 AioContext
*aio_context
;
1835 aio_context
= bdrv_get_aio_context(state
->bs
);
1836 aio_context_acquire(aio_context
);
1838 bdrv_drained_end(state
->bs
);
1840 aio_context_release(aio_context
);
1843 typedef struct BlockdevBackupState
{
1844 BlkActionState common
;
1845 BlockDriverState
*bs
;
1847 } BlockdevBackupState
;
1849 static BlockJob
*do_blockdev_backup(BlockdevBackup
*backup
, JobTxn
*txn
,
1852 static void blockdev_backup_prepare(BlkActionState
*common
, Error
**errp
)
1854 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
1855 BlockdevBackup
*backup
;
1856 BlockDriverState
*bs
, *target
;
1857 AioContext
*aio_context
;
1858 Error
*local_err
= NULL
;
1860 assert(common
->action
->type
== TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP
);
1861 backup
= common
->action
->u
.blockdev_backup
.data
;
1863 bs
= bdrv_lookup_bs(backup
->device
, backup
->device
, errp
);
1868 target
= bdrv_lookup_bs(backup
->target
, backup
->target
, errp
);
1873 aio_context
= bdrv_get_aio_context(bs
);
1874 aio_context_acquire(aio_context
);
1877 /* Paired with .clean() */
1878 bdrv_drained_begin(state
->bs
);
1880 state
->job
= do_blockdev_backup(backup
, common
->block_job_txn
, &local_err
);
1882 error_propagate(errp
, local_err
);
1887 aio_context_release(aio_context
);
1890 static void blockdev_backup_commit(BlkActionState
*common
)
1892 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
1893 AioContext
*aio_context
;
1895 aio_context
= bdrv_get_aio_context(state
->bs
);
1896 aio_context_acquire(aio_context
);
1899 job_start(&state
->job
->job
);
1901 aio_context_release(aio_context
);
1904 static void blockdev_backup_abort(BlkActionState
*common
)
1906 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
1909 AioContext
*aio_context
;
1911 aio_context
= bdrv_get_aio_context(state
->bs
);
1912 aio_context_acquire(aio_context
);
1914 job_cancel_sync(&state
->job
->job
);
1916 aio_context_release(aio_context
);
1920 static void blockdev_backup_clean(BlkActionState
*common
)
1922 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
1923 AioContext
*aio_context
;
1929 aio_context
= bdrv_get_aio_context(state
->bs
);
1930 aio_context_acquire(aio_context
);
1932 bdrv_drained_end(state
->bs
);
1934 aio_context_release(aio_context
);
1937 typedef struct BlockDirtyBitmapState
{
1938 BlkActionState common
;
1939 BdrvDirtyBitmap
*bitmap
;
1940 BlockDriverState
*bs
;
1944 } BlockDirtyBitmapState
;
1946 static void block_dirty_bitmap_add_prepare(BlkActionState
*common
,
1949 Error
*local_err
= NULL
;
1950 BlockDirtyBitmapAdd
*action
;
1951 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
1954 if (action_check_completion_mode(common
, errp
) < 0) {
1958 action
= common
->action
->u
.block_dirty_bitmap_add
.data
;
1959 /* AIO context taken and released within qmp_block_dirty_bitmap_add */
1960 qmp_block_dirty_bitmap_add(action
->node
, action
->name
,
1961 action
->has_granularity
, action
->granularity
,
1962 action
->has_persistent
, action
->persistent
,
1963 action
->has_autoload
, action
->autoload
,
1964 action
->has_disabled
, action
->disabled
,
1968 state
->prepared
= true;
1970 error_propagate(errp
, local_err
);
1974 static void block_dirty_bitmap_add_abort(BlkActionState
*common
)
1976 BlockDirtyBitmapAdd
*action
;
1977 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
1980 action
= common
->action
->u
.block_dirty_bitmap_add
.data
;
1981 /* Should not be able to fail: IF the bitmap was added via .prepare(),
1982 * then the node reference and bitmap name must have been valid.
1984 if (state
->prepared
) {
1985 qmp_block_dirty_bitmap_remove(action
->node
, action
->name
, &error_abort
);
1989 static void block_dirty_bitmap_clear_prepare(BlkActionState
*common
,
1992 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
1994 BlockDirtyBitmap
*action
;
1996 if (action_check_completion_mode(common
, errp
) < 0) {
2000 action
= common
->action
->u
.block_dirty_bitmap_clear
.data
;
2001 state
->bitmap
= block_dirty_bitmap_lookup(action
->node
,
2005 if (!state
->bitmap
) {
2009 if (bdrv_dirty_bitmap_check(state
->bitmap
, BDRV_BITMAP_DEFAULT
, errp
)) {
2013 bdrv_clear_dirty_bitmap(state
->bitmap
, &state
->backup
);
2016 static void block_dirty_bitmap_restore(BlkActionState
*common
)
2018 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2021 if (state
->backup
) {
2022 bdrv_restore_dirty_bitmap(state
->bitmap
, state
->backup
);
2026 static void block_dirty_bitmap_free_backup(BlkActionState
*common
)
2028 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2031 hbitmap_free(state
->backup
);
2034 static void block_dirty_bitmap_enable_prepare(BlkActionState
*common
,
2037 BlockDirtyBitmap
*action
;
2038 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2041 if (action_check_completion_mode(common
, errp
) < 0) {
2045 action
= common
->action
->u
.block_dirty_bitmap_enable
.data
;
2046 state
->bitmap
= block_dirty_bitmap_lookup(action
->node
,
2050 if (!state
->bitmap
) {
2054 if (bdrv_dirty_bitmap_check(state
->bitmap
, BDRV_BITMAP_ALLOW_RO
, errp
)) {
2058 state
->was_enabled
= bdrv_dirty_bitmap_enabled(state
->bitmap
);
2059 bdrv_enable_dirty_bitmap(state
->bitmap
);
2062 static void block_dirty_bitmap_enable_abort(BlkActionState
*common
)
2064 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2067 if (!state
->was_enabled
) {
2068 bdrv_disable_dirty_bitmap(state
->bitmap
);
2072 static void block_dirty_bitmap_disable_prepare(BlkActionState
*common
,
2075 BlockDirtyBitmap
*action
;
2076 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2079 if (action_check_completion_mode(common
, errp
) < 0) {
2083 action
= common
->action
->u
.block_dirty_bitmap_disable
.data
;
2084 state
->bitmap
= block_dirty_bitmap_lookup(action
->node
,
2088 if (!state
->bitmap
) {
2092 if (bdrv_dirty_bitmap_check(state
->bitmap
, BDRV_BITMAP_ALLOW_RO
, errp
)) {
2096 state
->was_enabled
= bdrv_dirty_bitmap_enabled(state
->bitmap
);
2097 bdrv_disable_dirty_bitmap(state
->bitmap
);
2100 static void block_dirty_bitmap_disable_abort(BlkActionState
*common
)
2102 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2105 if (state
->was_enabled
) {
2106 bdrv_enable_dirty_bitmap(state
->bitmap
);
2110 static BdrvDirtyBitmap
*do_block_dirty_bitmap_merge(const char *node
,
2116 static void block_dirty_bitmap_merge_prepare(BlkActionState
*common
,
2119 BlockDirtyBitmapMerge
*action
;
2120 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2123 if (action_check_completion_mode(common
, errp
) < 0) {
2127 action
= common
->action
->u
.block_dirty_bitmap_merge
.data
;
2129 state
->bitmap
= do_block_dirty_bitmap_merge(action
->node
, action
->target
,
2130 action
->bitmaps
, &state
->backup
,
2134 static void abort_prepare(BlkActionState
*common
, Error
**errp
)
2136 error_setg(errp
, "Transaction aborted using Abort action");
2139 static void abort_commit(BlkActionState
*common
)
2141 g_assert_not_reached(); /* this action never succeeds */
2144 static const BlkActionOps actions
[] = {
2145 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT
] = {
2146 .instance_size
= sizeof(ExternalSnapshotState
),
2147 .prepare
= external_snapshot_prepare
,
2148 .commit
= external_snapshot_commit
,
2149 .abort
= external_snapshot_abort
,
2150 .clean
= external_snapshot_clean
,
2152 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
] = {
2153 .instance_size
= sizeof(ExternalSnapshotState
),
2154 .prepare
= external_snapshot_prepare
,
2155 .commit
= external_snapshot_commit
,
2156 .abort
= external_snapshot_abort
,
2157 .clean
= external_snapshot_clean
,
2159 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP
] = {
2160 .instance_size
= sizeof(DriveBackupState
),
2161 .prepare
= drive_backup_prepare
,
2162 .commit
= drive_backup_commit
,
2163 .abort
= drive_backup_abort
,
2164 .clean
= drive_backup_clean
,
2166 [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP
] = {
2167 .instance_size
= sizeof(BlockdevBackupState
),
2168 .prepare
= blockdev_backup_prepare
,
2169 .commit
= blockdev_backup_commit
,
2170 .abort
= blockdev_backup_abort
,
2171 .clean
= blockdev_backup_clean
,
2173 [TRANSACTION_ACTION_KIND_ABORT
] = {
2174 .instance_size
= sizeof(BlkActionState
),
2175 .prepare
= abort_prepare
,
2176 .commit
= abort_commit
,
2178 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
] = {
2179 .instance_size
= sizeof(InternalSnapshotState
),
2180 .prepare
= internal_snapshot_prepare
,
2181 .abort
= internal_snapshot_abort
,
2182 .clean
= internal_snapshot_clean
,
2184 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD
] = {
2185 .instance_size
= sizeof(BlockDirtyBitmapState
),
2186 .prepare
= block_dirty_bitmap_add_prepare
,
2187 .abort
= block_dirty_bitmap_add_abort
,
2189 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR
] = {
2190 .instance_size
= sizeof(BlockDirtyBitmapState
),
2191 .prepare
= block_dirty_bitmap_clear_prepare
,
2192 .commit
= block_dirty_bitmap_free_backup
,
2193 .abort
= block_dirty_bitmap_restore
,
2195 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ENABLE
] = {
2196 .instance_size
= sizeof(BlockDirtyBitmapState
),
2197 .prepare
= block_dirty_bitmap_enable_prepare
,
2198 .abort
= block_dirty_bitmap_enable_abort
,
2200 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_DISABLE
] = {
2201 .instance_size
= sizeof(BlockDirtyBitmapState
),
2202 .prepare
= block_dirty_bitmap_disable_prepare
,
2203 .abort
= block_dirty_bitmap_disable_abort
,
2205 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_MERGE
] = {
2206 .instance_size
= sizeof(BlockDirtyBitmapState
),
2207 .prepare
= block_dirty_bitmap_merge_prepare
,
2208 .commit
= block_dirty_bitmap_free_backup
,
2209 .abort
= block_dirty_bitmap_restore
,
2211 /* Where are transactions for MIRROR, COMMIT and STREAM?
2212 * Although these blockjobs use transaction callbacks like the backup job,
2213 * these jobs do not necessarily adhere to transaction semantics.
2214 * These jobs may not fully undo all of their actions on abort, nor do they
2215 * necessarily work in transactions with more than one job in them.
2220 * Allocate a TransactionProperties structure if necessary, and fill
2221 * that structure with desired defaults if they are unset.
2223 static TransactionProperties
*get_transaction_properties(
2224 TransactionProperties
*props
)
2227 props
= g_new0(TransactionProperties
, 1);
2230 if (!props
->has_completion_mode
) {
2231 props
->has_completion_mode
= true;
2232 props
->completion_mode
= ACTION_COMPLETION_MODE_INDIVIDUAL
;
2239 * 'Atomic' group operations. The operations are performed as a set, and if
2240 * any fail then we roll back all operations in the group.
2242 void qmp_transaction(TransactionActionList
*dev_list
,
2244 struct TransactionProperties
*props
,
2247 TransactionActionList
*dev_entry
= dev_list
;
2248 JobTxn
*block_job_txn
= NULL
;
2249 BlkActionState
*state
, *next
;
2250 Error
*local_err
= NULL
;
2252 QTAILQ_HEAD(, BlkActionState
) snap_bdrv_states
;
2253 QTAILQ_INIT(&snap_bdrv_states
);
2255 /* Does this transaction get canceled as a group on failure?
2256 * If not, we don't really need to make a JobTxn.
2258 props
= get_transaction_properties(props
);
2259 if (props
->completion_mode
!= ACTION_COMPLETION_MODE_INDIVIDUAL
) {
2260 block_job_txn
= job_txn_new();
2263 /* drain all i/o before any operations */
2266 /* We don't do anything in this loop that commits us to the operations */
2267 while (NULL
!= dev_entry
) {
2268 TransactionAction
*dev_info
= NULL
;
2269 const BlkActionOps
*ops
;
2271 dev_info
= dev_entry
->value
;
2272 dev_entry
= dev_entry
->next
;
2274 assert(dev_info
->type
< ARRAY_SIZE(actions
));
2276 ops
= &actions
[dev_info
->type
];
2277 assert(ops
->instance_size
> 0);
2279 state
= g_malloc0(ops
->instance_size
);
2281 state
->action
= dev_info
;
2282 state
->block_job_txn
= block_job_txn
;
2283 state
->txn_props
= props
;
2284 QTAILQ_INSERT_TAIL(&snap_bdrv_states
, state
, entry
);
2286 state
->ops
->prepare(state
, &local_err
);
2288 error_propagate(errp
, local_err
);
2289 goto delete_and_fail
;
2293 QTAILQ_FOREACH(state
, &snap_bdrv_states
, entry
) {
2294 if (state
->ops
->commit
) {
2295 state
->ops
->commit(state
);
2303 /* failure, and it is all-or-none; roll back all operations */
2304 QTAILQ_FOREACH_REVERSE(state
, &snap_bdrv_states
, entry
) {
2305 if (state
->ops
->abort
) {
2306 state
->ops
->abort(state
);
2310 QTAILQ_FOREACH_SAFE(state
, &snap_bdrv_states
, entry
, next
) {
2311 if (state
->ops
->clean
) {
2312 state
->ops
->clean(state
);
2317 qapi_free_TransactionProperties(props
);
2319 job_txn_unref(block_job_txn
);
2322 void qmp_eject(bool has_device
, const char *device
,
2323 bool has_id
, const char *id
,
2324 bool has_force
, bool force
, Error
**errp
)
2326 Error
*local_err
= NULL
;
2333 rc
= do_open_tray(has_device
? device
: NULL
,
2336 if (rc
&& rc
!= -ENOSYS
) {
2337 error_propagate(errp
, local_err
);
2340 error_free(local_err
);
2342 blockdev_remove_medium(has_device
, device
, has_id
, id
, errp
);
2345 void qmp_block_passwd(bool has_device
, const char *device
,
2346 bool has_node_name
, const char *node_name
,
2347 const char *password
, Error
**errp
)
2350 "Setting block passwords directly is no longer supported");
2354 * Attempt to open the tray of @device.
2355 * If @force, ignore its tray lock.
2356 * Else, if the tray is locked, don't open it, but ask the guest to open it.
2357 * On error, store an error through @errp and return -errno.
2358 * If @device does not exist, return -ENODEV.
2359 * If it has no removable media, return -ENOTSUP.
2360 * If it has no tray, return -ENOSYS.
2361 * If the guest was asked to open the tray, return -EINPROGRESS.
2364 static int do_open_tray(const char *blk_name
, const char *qdev_id
,
2365 bool force
, Error
**errp
)
2368 const char *device
= qdev_id
?: blk_name
;
2371 blk
= qmp_get_blk(blk_name
, qdev_id
, errp
);
2376 if (!blk_dev_has_removable_media(blk
)) {
2377 error_setg(errp
, "Device '%s' is not removable", device
);
2381 if (!blk_dev_has_tray(blk
)) {
2382 error_setg(errp
, "Device '%s' does not have a tray", device
);
2386 if (blk_dev_is_tray_open(blk
)) {
2390 locked
= blk_dev_is_medium_locked(blk
);
2392 blk_dev_eject_request(blk
, force
);
2395 if (!locked
|| force
) {
2396 blk_dev_change_media_cb(blk
, false, &error_abort
);
2399 if (locked
&& !force
) {
2400 error_setg(errp
, "Device '%s' is locked and force was not specified, "
2401 "wait for tray to open and try again", device
);
2402 return -EINPROGRESS
;
2408 void qmp_blockdev_open_tray(bool has_device
, const char *device
,
2409 bool has_id
, const char *id
,
2410 bool has_force
, bool force
,
2413 Error
*local_err
= NULL
;
2419 rc
= do_open_tray(has_device
? device
: NULL
,
2422 if (rc
&& rc
!= -ENOSYS
&& rc
!= -EINPROGRESS
) {
2423 error_propagate(errp
, local_err
);
2426 error_free(local_err
);
2429 void qmp_blockdev_close_tray(bool has_device
, const char *device
,
2430 bool has_id
, const char *id
,
2434 Error
*local_err
= NULL
;
2436 device
= has_device
? device
: NULL
;
2437 id
= has_id
? id
: NULL
;
2439 blk
= qmp_get_blk(device
, id
, errp
);
2444 if (!blk_dev_has_removable_media(blk
)) {
2445 error_setg(errp
, "Device '%s' is not removable", device
?: id
);
2449 if (!blk_dev_has_tray(blk
)) {
2450 /* Ignore this command on tray-less devices */
2454 if (!blk_dev_is_tray_open(blk
)) {
2458 blk_dev_change_media_cb(blk
, true, &local_err
);
2460 error_propagate(errp
, local_err
);
2465 static void blockdev_remove_medium(bool has_device
, const char *device
,
2466 bool has_id
, const char *id
, Error
**errp
)
2469 BlockDriverState
*bs
;
2470 AioContext
*aio_context
;
2471 bool has_attached_device
;
2473 device
= has_device
? device
: NULL
;
2474 id
= has_id
? id
: NULL
;
2476 blk
= qmp_get_blk(device
, id
, errp
);
2481 /* For BBs without a device, we can exchange the BDS tree at will */
2482 has_attached_device
= blk_get_attached_dev(blk
);
2484 if (has_attached_device
&& !blk_dev_has_removable_media(blk
)) {
2485 error_setg(errp
, "Device '%s' is not removable", device
?: id
);
2489 if (has_attached_device
&& blk_dev_has_tray(blk
) &&
2490 !blk_dev_is_tray_open(blk
))
2492 error_setg(errp
, "Tray of device '%s' is not open", device
?: id
);
2501 aio_context
= bdrv_get_aio_context(bs
);
2502 aio_context_acquire(aio_context
);
2504 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_EJECT
, errp
)) {
2510 if (!blk_dev_has_tray(blk
)) {
2511 /* For tray-less devices, blockdev-open-tray is a no-op (or may not be
2512 * called at all); therefore, the medium needs to be ejected here.
2513 * Do it after blk_remove_bs() so blk_is_inserted(blk) returns the @load
2514 * value passed here (i.e. false). */
2515 blk_dev_change_media_cb(blk
, false, &error_abort
);
2519 aio_context_release(aio_context
);
2522 void qmp_blockdev_remove_medium(const char *id
, Error
**errp
)
2524 blockdev_remove_medium(false, NULL
, true, id
, errp
);
2527 static void qmp_blockdev_insert_anon_medium(BlockBackend
*blk
,
2528 BlockDriverState
*bs
, Error
**errp
)
2530 Error
*local_err
= NULL
;
2534 /* For BBs without a device, we can exchange the BDS tree at will */
2535 has_device
= blk_get_attached_dev(blk
);
2537 if (has_device
&& !blk_dev_has_removable_media(blk
)) {
2538 error_setg(errp
, "Device is not removable");
2542 if (has_device
&& blk_dev_has_tray(blk
) && !blk_dev_is_tray_open(blk
)) {
2543 error_setg(errp
, "Tray of the device is not open");
2548 error_setg(errp
, "There already is a medium in the device");
2552 ret
= blk_insert_bs(blk
, bs
, errp
);
2557 if (!blk_dev_has_tray(blk
)) {
2558 /* For tray-less devices, blockdev-close-tray is a no-op (or may not be
2559 * called at all); therefore, the medium needs to be pushed into the
2561 * Do it after blk_insert_bs() so blk_is_inserted(blk) returns the @load
2562 * value passed here (i.e. true). */
2563 blk_dev_change_media_cb(blk
, true, &local_err
);
2565 error_propagate(errp
, local_err
);
2572 static void blockdev_insert_medium(bool has_device
, const char *device
,
2573 bool has_id
, const char *id
,
2574 const char *node_name
, Error
**errp
)
2577 BlockDriverState
*bs
;
2579 blk
= qmp_get_blk(has_device
? device
: NULL
,
2586 bs
= bdrv_find_node(node_name
);
2588 error_setg(errp
, "Node '%s' not found", node_name
);
2592 if (bdrv_has_blk(bs
)) {
2593 error_setg(errp
, "Node '%s' is already in use", node_name
);
2597 qmp_blockdev_insert_anon_medium(blk
, bs
, errp
);
2600 void qmp_blockdev_insert_medium(const char *id
, const char *node_name
,
2603 blockdev_insert_medium(false, NULL
, true, id
, node_name
, errp
);
2606 void qmp_blockdev_change_medium(bool has_device
, const char *device
,
2607 bool has_id
, const char *id
,
2608 const char *filename
,
2609 bool has_format
, const char *format
,
2611 BlockdevChangeReadOnlyMode read_only
,
2615 BlockDriverState
*medium_bs
= NULL
;
2619 QDict
*options
= NULL
;
2622 blk
= qmp_get_blk(has_device
? device
: NULL
,
2630 blk_update_root_state(blk
);
2633 bdrv_flags
= blk_get_open_flags_from_root_state(blk
);
2634 bdrv_flags
&= ~(BDRV_O_TEMPORARY
| BDRV_O_SNAPSHOT
| BDRV_O_NO_BACKING
|
2635 BDRV_O_PROTOCOL
| BDRV_O_AUTO_RDONLY
);
2637 if (!has_read_only
) {
2638 read_only
= BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN
;
2641 switch (read_only
) {
2642 case BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN
:
2645 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_ONLY
:
2646 bdrv_flags
&= ~BDRV_O_RDWR
;
2649 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_WRITE
:
2650 bdrv_flags
|= BDRV_O_RDWR
;
2657 options
= qdict_new();
2658 detect_zeroes
= blk_get_detect_zeroes_from_root_state(blk
);
2659 qdict_put_str(options
, "detect-zeroes", detect_zeroes
? "on" : "off");
2662 qdict_put_str(options
, "driver", format
);
2665 medium_bs
= bdrv_open(filename
, NULL
, options
, bdrv_flags
, errp
);
2670 rc
= do_open_tray(has_device
? device
: NULL
,
2673 if (rc
&& rc
!= -ENOSYS
) {
2674 error_propagate(errp
, err
);
2680 blockdev_remove_medium(has_device
, device
, has_id
, id
, &err
);
2682 error_propagate(errp
, err
);
2686 qmp_blockdev_insert_anon_medium(blk
, medium_bs
, &err
);
2688 error_propagate(errp
, err
);
2692 qmp_blockdev_close_tray(has_device
, device
, has_id
, id
, errp
);
2695 /* If the medium has been inserted, the device has its own reference, so
2696 * ours must be relinquished; and if it has not been inserted successfully,
2697 * the reference must be relinquished anyway */
2698 bdrv_unref(medium_bs
);
2701 /* throttling disk I/O limits */
2702 void qmp_block_set_io_throttle(BlockIOThrottle
*arg
, Error
**errp
)
2705 BlockDriverState
*bs
;
2707 AioContext
*aio_context
;
2709 blk
= qmp_get_blk(arg
->has_device
? arg
->device
: NULL
,
2710 arg
->has_id
? arg
->id
: NULL
,
2716 aio_context
= blk_get_aio_context(blk
);
2717 aio_context_acquire(aio_context
);
2721 error_setg(errp
, "Device has no medium");
2725 throttle_config_init(&cfg
);
2726 cfg
.buckets
[THROTTLE_BPS_TOTAL
].avg
= arg
->bps
;
2727 cfg
.buckets
[THROTTLE_BPS_READ
].avg
= arg
->bps_rd
;
2728 cfg
.buckets
[THROTTLE_BPS_WRITE
].avg
= arg
->bps_wr
;
2730 cfg
.buckets
[THROTTLE_OPS_TOTAL
].avg
= arg
->iops
;
2731 cfg
.buckets
[THROTTLE_OPS_READ
].avg
= arg
->iops_rd
;
2732 cfg
.buckets
[THROTTLE_OPS_WRITE
].avg
= arg
->iops_wr
;
2734 if (arg
->has_bps_max
) {
2735 cfg
.buckets
[THROTTLE_BPS_TOTAL
].max
= arg
->bps_max
;
2737 if (arg
->has_bps_rd_max
) {
2738 cfg
.buckets
[THROTTLE_BPS_READ
].max
= arg
->bps_rd_max
;
2740 if (arg
->has_bps_wr_max
) {
2741 cfg
.buckets
[THROTTLE_BPS_WRITE
].max
= arg
->bps_wr_max
;
2743 if (arg
->has_iops_max
) {
2744 cfg
.buckets
[THROTTLE_OPS_TOTAL
].max
= arg
->iops_max
;
2746 if (arg
->has_iops_rd_max
) {
2747 cfg
.buckets
[THROTTLE_OPS_READ
].max
= arg
->iops_rd_max
;
2749 if (arg
->has_iops_wr_max
) {
2750 cfg
.buckets
[THROTTLE_OPS_WRITE
].max
= arg
->iops_wr_max
;
2753 if (arg
->has_bps_max_length
) {
2754 cfg
.buckets
[THROTTLE_BPS_TOTAL
].burst_length
= arg
->bps_max_length
;
2756 if (arg
->has_bps_rd_max_length
) {
2757 cfg
.buckets
[THROTTLE_BPS_READ
].burst_length
= arg
->bps_rd_max_length
;
2759 if (arg
->has_bps_wr_max_length
) {
2760 cfg
.buckets
[THROTTLE_BPS_WRITE
].burst_length
= arg
->bps_wr_max_length
;
2762 if (arg
->has_iops_max_length
) {
2763 cfg
.buckets
[THROTTLE_OPS_TOTAL
].burst_length
= arg
->iops_max_length
;
2765 if (arg
->has_iops_rd_max_length
) {
2766 cfg
.buckets
[THROTTLE_OPS_READ
].burst_length
= arg
->iops_rd_max_length
;
2768 if (arg
->has_iops_wr_max_length
) {
2769 cfg
.buckets
[THROTTLE_OPS_WRITE
].burst_length
= arg
->iops_wr_max_length
;
2772 if (arg
->has_iops_size
) {
2773 cfg
.op_size
= arg
->iops_size
;
2776 if (!throttle_is_valid(&cfg
, errp
)) {
2780 if (throttle_enabled(&cfg
)) {
2781 /* Enable I/O limits if they're not enabled yet, otherwise
2782 * just update the throttling group. */
2783 if (!blk_get_public(blk
)->throttle_group_member
.throttle_state
) {
2784 blk_io_limits_enable(blk
,
2785 arg
->has_group
? arg
->group
:
2786 arg
->has_device
? arg
->device
:
2788 } else if (arg
->has_group
) {
2789 blk_io_limits_update_group(blk
, arg
->group
);
2791 /* Set the new throttling configuration */
2792 blk_set_io_limits(blk
, &cfg
);
2793 } else if (blk_get_public(blk
)->throttle_group_member
.throttle_state
) {
2794 /* If all throttling settings are set to 0, disable I/O limits */
2795 blk_io_limits_disable(blk
);
2799 aio_context_release(aio_context
);
2802 void qmp_block_dirty_bitmap_add(const char *node
, const char *name
,
2803 bool has_granularity
, uint32_t granularity
,
2804 bool has_persistent
, bool persistent
,
2805 bool has_autoload
, bool autoload
,
2806 bool has_disabled
, bool disabled
,
2809 BlockDriverState
*bs
;
2810 BdrvDirtyBitmap
*bitmap
;
2811 AioContext
*aio_context
= NULL
;
2813 if (!name
|| name
[0] == '\0') {
2814 error_setg(errp
, "Bitmap name cannot be empty");
2818 bs
= bdrv_lookup_bs(node
, node
, errp
);
2823 if (has_granularity
) {
2824 if (granularity
< 512 || !is_power_of_2(granularity
)) {
2825 error_setg(errp
, "Granularity must be power of 2 "
2826 "and at least 512");
2830 /* Default to cluster size, if available: */
2831 granularity
= bdrv_get_default_bitmap_granularity(bs
);
2834 if (!has_persistent
) {
2839 warn_report("Autoload option is deprecated and its value is ignored");
2842 if (!has_disabled
) {
2847 aio_context
= bdrv_get_aio_context(bs
);
2848 aio_context_acquire(aio_context
);
2849 if (!bdrv_can_store_new_dirty_bitmap(bs
, name
, granularity
, errp
)) {
2854 bitmap
= bdrv_create_dirty_bitmap(bs
, granularity
, name
, errp
);
2855 if (bitmap
== NULL
) {
2860 bdrv_disable_dirty_bitmap(bitmap
);
2863 bdrv_dirty_bitmap_set_persistence(bitmap
, persistent
);
2866 aio_context_release(aio_context
);
2870 void qmp_block_dirty_bitmap_remove(const char *node
, const char *name
,
2873 BlockDriverState
*bs
;
2874 BdrvDirtyBitmap
*bitmap
;
2875 Error
*local_err
= NULL
;
2876 AioContext
*aio_context
= NULL
;
2878 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
2879 if (!bitmap
|| !bs
) {
2883 if (bdrv_dirty_bitmap_check(bitmap
, BDRV_BITMAP_BUSY
| BDRV_BITMAP_RO
,
2888 if (bdrv_dirty_bitmap_get_persistence(bitmap
)) {
2889 aio_context
= bdrv_get_aio_context(bs
);
2890 aio_context_acquire(aio_context
);
2891 bdrv_remove_persistent_dirty_bitmap(bs
, name
, &local_err
);
2892 if (local_err
!= NULL
) {
2893 error_propagate(errp
, local_err
);
2898 bdrv_release_dirty_bitmap(bs
, bitmap
);
2901 aio_context_release(aio_context
);
2906 * Completely clear a bitmap, for the purposes of synchronizing a bitmap
2907 * immediately after a full backup operation.
2909 void qmp_block_dirty_bitmap_clear(const char *node
, const char *name
,
2912 BdrvDirtyBitmap
*bitmap
;
2913 BlockDriverState
*bs
;
2915 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
2916 if (!bitmap
|| !bs
) {
2920 if (bdrv_dirty_bitmap_check(bitmap
, BDRV_BITMAP_DEFAULT
, errp
)) {
2924 bdrv_clear_dirty_bitmap(bitmap
, NULL
);
2927 void qmp_block_dirty_bitmap_enable(const char *node
, const char *name
,
2930 BlockDriverState
*bs
;
2931 BdrvDirtyBitmap
*bitmap
;
2933 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
2938 if (bdrv_dirty_bitmap_check(bitmap
, BDRV_BITMAP_ALLOW_RO
, errp
)) {
2942 bdrv_enable_dirty_bitmap(bitmap
);
2945 void qmp_block_dirty_bitmap_disable(const char *node
, const char *name
,
2948 BlockDriverState
*bs
;
2949 BdrvDirtyBitmap
*bitmap
;
2951 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
2956 if (bdrv_dirty_bitmap_check(bitmap
, BDRV_BITMAP_ALLOW_RO
, errp
)) {
2960 bdrv_disable_dirty_bitmap(bitmap
);
2963 static BdrvDirtyBitmap
*do_block_dirty_bitmap_merge(const char *node
,
2969 BlockDriverState
*bs
;
2970 BdrvDirtyBitmap
*dst
, *src
, *anon
;
2972 Error
*local_err
= NULL
;
2974 dst
= block_dirty_bitmap_lookup(node
, target
, &bs
, errp
);
2979 anon
= bdrv_create_dirty_bitmap(bs
, bdrv_dirty_bitmap_granularity(dst
),
2985 for (lst
= bitmaps
; lst
; lst
= lst
->next
) {
2986 src
= bdrv_find_dirty_bitmap(bs
, lst
->value
);
2988 error_setg(errp
, "Dirty bitmap '%s' not found", lst
->value
);
2993 bdrv_merge_dirty_bitmap(anon
, src
, NULL
, &local_err
);
2995 error_propagate(errp
, local_err
);
3001 /* Merge into dst; dst is unchanged on failure. */
3002 bdrv_merge_dirty_bitmap(dst
, anon
, backup
, errp
);
3005 bdrv_release_dirty_bitmap(bs
, anon
);
3009 void qmp_block_dirty_bitmap_merge(const char *node
, const char *target
,
3010 strList
*bitmaps
, Error
**errp
)
3012 do_block_dirty_bitmap_merge(node
, target
, bitmaps
, NULL
, errp
);
3015 BlockDirtyBitmapSha256
*qmp_x_debug_block_dirty_bitmap_sha256(const char *node
,
3019 BdrvDirtyBitmap
*bitmap
;
3020 BlockDriverState
*bs
;
3021 BlockDirtyBitmapSha256
*ret
= NULL
;
3024 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
3025 if (!bitmap
|| !bs
) {
3029 sha256
= bdrv_dirty_bitmap_sha256(bitmap
, errp
);
3030 if (sha256
== NULL
) {
3034 ret
= g_new(BlockDirtyBitmapSha256
, 1);
3035 ret
->sha256
= sha256
;
3040 void hmp_drive_del(Monitor
*mon
, const QDict
*qdict
)
3042 const char *id
= qdict_get_str(qdict
, "id");
3044 BlockDriverState
*bs
;
3045 AioContext
*aio_context
;
3046 Error
*local_err
= NULL
;
3048 bs
= bdrv_find_node(id
);
3050 qmp_blockdev_del(id
, &local_err
);
3052 error_report_err(local_err
);
3057 blk
= blk_by_name(id
);
3059 error_report("Device '%s' not found", id
);
3063 if (!blk_legacy_dinfo(blk
)) {
3064 error_report("Deleting device added with blockdev-add"
3065 " is not supported");
3069 aio_context
= blk_get_aio_context(blk
);
3070 aio_context_acquire(aio_context
);
3074 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_DRIVE_DEL
, &local_err
)) {
3075 error_report_err(local_err
);
3076 aio_context_release(aio_context
);
3083 /* Make the BlockBackend and the attached BlockDriverState anonymous */
3084 monitor_remove_blk(blk
);
3086 /* If this BlockBackend has a device attached to it, its refcount will be
3087 * decremented when the device is removed; otherwise we have to do so here.
3089 if (blk_get_attached_dev(blk
)) {
3090 /* Further I/O must not pause the guest */
3091 blk_set_on_error(blk
, BLOCKDEV_ON_ERROR_REPORT
,
3092 BLOCKDEV_ON_ERROR_REPORT
);
3097 aio_context_release(aio_context
);
3100 void qmp_block_resize(bool has_device
, const char *device
,
3101 bool has_node_name
, const char *node_name
,
3102 int64_t size
, Error
**errp
)
3104 Error
*local_err
= NULL
;
3105 BlockBackend
*blk
= NULL
;
3106 BlockDriverState
*bs
;
3107 AioContext
*aio_context
;
3110 bs
= bdrv_lookup_bs(has_device
? device
: NULL
,
3111 has_node_name
? node_name
: NULL
,
3114 error_propagate(errp
, local_err
);
3118 aio_context
= bdrv_get_aio_context(bs
);
3119 aio_context_acquire(aio_context
);
3121 if (!bdrv_is_first_non_filter(bs
)) {
3122 error_setg(errp
, QERR_FEATURE_DISABLED
, "resize");
3127 error_setg(errp
, QERR_INVALID_PARAMETER_VALUE
, "size", "a >0 size");
3131 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_RESIZE
, NULL
)) {
3132 error_setg(errp
, QERR_DEVICE_IN_USE
, device
);
3136 blk
= blk_new(BLK_PERM_RESIZE
, BLK_PERM_ALL
);
3137 ret
= blk_insert_bs(blk
, bs
, errp
);
3142 bdrv_drained_begin(bs
);
3143 ret
= blk_truncate(blk
, size
, PREALLOC_MODE_OFF
, errp
);
3144 bdrv_drained_end(bs
);
3148 aio_context_release(aio_context
);
3151 void qmp_block_stream(bool has_job_id
, const char *job_id
, const char *device
,
3152 bool has_base
, const char *base
,
3153 bool has_base_node
, const char *base_node
,
3154 bool has_backing_file
, const char *backing_file
,
3155 bool has_speed
, int64_t speed
,
3156 bool has_on_error
, BlockdevOnError on_error
,
3157 bool has_auto_finalize
, bool auto_finalize
,
3158 bool has_auto_dismiss
, bool auto_dismiss
,
3161 BlockDriverState
*bs
, *iter
;
3162 BlockDriverState
*base_bs
= NULL
;
3163 AioContext
*aio_context
;
3164 Error
*local_err
= NULL
;
3165 const char *base_name
= NULL
;
3166 int job_flags
= JOB_DEFAULT
;
3168 if (!has_on_error
) {
3169 on_error
= BLOCKDEV_ON_ERROR_REPORT
;
3172 bs
= bdrv_lookup_bs(device
, device
, errp
);
3177 aio_context
= bdrv_get_aio_context(bs
);
3178 aio_context_acquire(aio_context
);
3180 if (has_base
&& has_base_node
) {
3181 error_setg(errp
, "'base' and 'base-node' cannot be specified "
3182 "at the same time");
3187 base_bs
= bdrv_find_backing_image(bs
, base
);
3188 if (base_bs
== NULL
) {
3189 error_setg(errp
, QERR_BASE_NOT_FOUND
, base
);
3192 assert(bdrv_get_aio_context(base_bs
) == aio_context
);
3196 if (has_base_node
) {
3197 base_bs
= bdrv_lookup_bs(NULL
, base_node
, errp
);
3201 if (bs
== base_bs
|| !bdrv_chain_contains(bs
, base_bs
)) {
3202 error_setg(errp
, "Node '%s' is not a backing image of '%s'",
3206 assert(bdrv_get_aio_context(base_bs
) == aio_context
);
3207 bdrv_refresh_filename(base_bs
);
3208 base_name
= base_bs
->filename
;
3211 /* Check for op blockers in the whole chain between bs and base */
3212 for (iter
= bs
; iter
&& iter
!= base_bs
; iter
= backing_bs(iter
)) {
3213 if (bdrv_op_is_blocked(iter
, BLOCK_OP_TYPE_STREAM
, errp
)) {
3218 /* if we are streaming the entire chain, the result will have no backing
3219 * file, and specifying one is therefore an error */
3220 if (base_bs
== NULL
&& has_backing_file
) {
3221 error_setg(errp
, "backing file specified, but streaming the "
3226 /* backing_file string overrides base bs filename */
3227 base_name
= has_backing_file
? backing_file
: base_name
;
3229 if (has_auto_finalize
&& !auto_finalize
) {
3230 job_flags
|= JOB_MANUAL_FINALIZE
;
3232 if (has_auto_dismiss
&& !auto_dismiss
) {
3233 job_flags
|= JOB_MANUAL_DISMISS
;
3236 stream_start(has_job_id
? job_id
: NULL
, bs
, base_bs
, base_name
,
3237 job_flags
, has_speed
? speed
: 0, on_error
, &local_err
);
3239 error_propagate(errp
, local_err
);
3243 trace_qmp_block_stream(bs
, bs
->job
);
3246 aio_context_release(aio_context
);
3249 void qmp_block_commit(bool has_job_id
, const char *job_id
, const char *device
,
3250 bool has_base_node
, const char *base_node
,
3251 bool has_base
, const char *base
,
3252 bool has_top_node
, const char *top_node
,
3253 bool has_top
, const char *top
,
3254 bool has_backing_file
, const char *backing_file
,
3255 bool has_speed
, int64_t speed
,
3256 bool has_filter_node_name
, const char *filter_node_name
,
3257 bool has_auto_finalize
, bool auto_finalize
,
3258 bool has_auto_dismiss
, bool auto_dismiss
,
3261 BlockDriverState
*bs
;
3262 BlockDriverState
*iter
;
3263 BlockDriverState
*base_bs
, *top_bs
;
3264 AioContext
*aio_context
;
3265 Error
*local_err
= NULL
;
3266 /* This will be part of the QMP command, if/when the
3267 * BlockdevOnError change for blkmirror makes it in
3269 BlockdevOnError on_error
= BLOCKDEV_ON_ERROR_REPORT
;
3270 int job_flags
= JOB_DEFAULT
;
3275 if (!has_filter_node_name
) {
3276 filter_node_name
= NULL
;
3278 if (has_auto_finalize
&& !auto_finalize
) {
3279 job_flags
|= JOB_MANUAL_FINALIZE
;
3281 if (has_auto_dismiss
&& !auto_dismiss
) {
3282 job_flags
|= JOB_MANUAL_DISMISS
;
3286 * libvirt relies on the DeviceNotFound error class in order to probe for
3287 * live commit feature versions; for this to work, we must make sure to
3288 * perform the device lookup before any generic errors that may occur in a
3289 * scenario in which all optional arguments are omitted. */
3290 bs
= qmp_get_root_bs(device
, &local_err
);
3292 bs
= bdrv_lookup_bs(device
, device
, NULL
);
3294 error_free(local_err
);
3295 error_set(errp
, ERROR_CLASS_DEVICE_NOT_FOUND
,
3296 "Device '%s' not found", device
);
3298 error_propagate(errp
, local_err
);
3303 aio_context
= bdrv_get_aio_context(bs
);
3304 aio_context_acquire(aio_context
);
3306 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_COMMIT_SOURCE
, errp
)) {
3310 /* default top_bs is the active layer */
3313 if (has_top_node
&& has_top
) {
3314 error_setg(errp
, "'top-node' and 'top' are mutually exclusive");
3316 } else if (has_top_node
) {
3317 top_bs
= bdrv_lookup_bs(NULL
, top_node
, errp
);
3318 if (top_bs
== NULL
) {
3321 if (!bdrv_chain_contains(bs
, top_bs
)) {
3322 error_setg(errp
, "'%s' is not in this backing file chain",
3326 } else if (has_top
&& top
) {
3327 /* This strcmp() is just a shortcut, there is no need to
3328 * refresh @bs's filename. If it mismatches,
3329 * bdrv_find_backing_image() will do the refresh and may still
3331 if (strcmp(bs
->filename
, top
) != 0) {
3332 top_bs
= bdrv_find_backing_image(bs
, top
);
3336 if (top_bs
== NULL
) {
3337 error_setg(errp
, "Top image file %s not found", top
? top
: "NULL");
3341 assert(bdrv_get_aio_context(top_bs
) == aio_context
);
3343 if (has_base_node
&& has_base
) {
3344 error_setg(errp
, "'base-node' and 'base' are mutually exclusive");
3346 } else if (has_base_node
) {
3347 base_bs
= bdrv_lookup_bs(NULL
, base_node
, errp
);
3348 if (base_bs
== NULL
) {
3351 if (!bdrv_chain_contains(top_bs
, base_bs
)) {
3352 error_setg(errp
, "'%s' is not in this backing file chain",
3356 } else if (has_base
&& base
) {
3357 base_bs
= bdrv_find_backing_image(top_bs
, base
);
3359 base_bs
= bdrv_find_base(top_bs
);
3362 if (base_bs
== NULL
) {
3363 error_setg(errp
, QERR_BASE_NOT_FOUND
, base
? base
: "NULL");
3367 assert(bdrv_get_aio_context(base_bs
) == aio_context
);
3369 for (iter
= top_bs
; iter
!= backing_bs(base_bs
); iter
= backing_bs(iter
)) {
3370 if (bdrv_op_is_blocked(iter
, BLOCK_OP_TYPE_COMMIT_TARGET
, errp
)) {
3375 /* Do not allow attempts to commit an image into itself */
3376 if (top_bs
== base_bs
) {
3377 error_setg(errp
, "cannot commit an image into itself");
3382 if (has_backing_file
) {
3383 error_setg(errp
, "'backing-file' specified,"
3384 " but 'top' is the active layer");
3387 commit_active_start(has_job_id
? job_id
: NULL
, bs
, base_bs
,
3388 job_flags
, speed
, on_error
,
3389 filter_node_name
, NULL
, NULL
, false, &local_err
);
3391 BlockDriverState
*overlay_bs
= bdrv_find_overlay(bs
, top_bs
);
3392 if (bdrv_op_is_blocked(overlay_bs
, BLOCK_OP_TYPE_COMMIT_TARGET
, errp
)) {
3395 commit_start(has_job_id
? job_id
: NULL
, bs
, base_bs
, top_bs
, job_flags
,
3396 speed
, on_error
, has_backing_file
? backing_file
: NULL
,
3397 filter_node_name
, &local_err
);
3399 if (local_err
!= NULL
) {
3400 error_propagate(errp
, local_err
);
3405 aio_context_release(aio_context
);
3408 static BlockJob
*do_drive_backup(DriveBackup
*backup
, JobTxn
*txn
,
3411 BlockDriverState
*bs
;
3412 BlockDriverState
*target_bs
;
3413 BlockDriverState
*source
= NULL
;
3414 BlockJob
*job
= NULL
;
3415 BdrvDirtyBitmap
*bmap
= NULL
;
3416 AioContext
*aio_context
;
3417 QDict
*options
= NULL
;
3418 Error
*local_err
= NULL
;
3419 int flags
, job_flags
= JOB_DEFAULT
;
3421 bool set_backing_hd
= false;
3423 if (!backup
->has_speed
) {
3426 if (!backup
->has_on_source_error
) {
3427 backup
->on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
3429 if (!backup
->has_on_target_error
) {
3430 backup
->on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
3432 if (!backup
->has_mode
) {
3433 backup
->mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
3435 if (!backup
->has_job_id
) {
3436 backup
->job_id
= NULL
;
3438 if (!backup
->has_auto_finalize
) {
3439 backup
->auto_finalize
= true;
3441 if (!backup
->has_auto_dismiss
) {
3442 backup
->auto_dismiss
= true;
3444 if (!backup
->has_compress
) {
3445 backup
->compress
= false;
3448 bs
= qmp_get_root_bs(backup
->device
, errp
);
3453 aio_context
= bdrv_get_aio_context(bs
);
3454 aio_context_acquire(aio_context
);
3456 if (!backup
->has_format
) {
3457 backup
->format
= backup
->mode
== NEW_IMAGE_MODE_EXISTING
?
3458 NULL
: (char*) bs
->drv
->format_name
;
3461 /* Early check to avoid creating target */
3462 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_BACKUP_SOURCE
, errp
)) {
3466 flags
= bs
->open_flags
| BDRV_O_RDWR
;
3468 /* See if we have a backing HD we can use to create our new image
3470 if (backup
->sync
== MIRROR_SYNC_MODE_TOP
) {
3471 source
= backing_bs(bs
);
3473 backup
->sync
= MIRROR_SYNC_MODE_FULL
;
3476 if (backup
->sync
== MIRROR_SYNC_MODE_NONE
) {
3478 flags
|= BDRV_O_NO_BACKING
;
3479 set_backing_hd
= true;
3482 size
= bdrv_getlength(bs
);
3484 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
3488 if (backup
->mode
!= NEW_IMAGE_MODE_EXISTING
) {
3489 assert(backup
->format
);
3491 bdrv_refresh_filename(source
);
3492 bdrv_img_create(backup
->target
, backup
->format
, source
->filename
,
3493 source
->drv
->format_name
, NULL
,
3494 size
, flags
, false, &local_err
);
3496 bdrv_img_create(backup
->target
, backup
->format
, NULL
, NULL
, NULL
,
3497 size
, flags
, false, &local_err
);
3502 error_propagate(errp
, local_err
);
3506 if (backup
->format
) {
3508 options
= qdict_new();
3510 qdict_put_str(options
, "driver", backup
->format
);
3513 target_bs
= bdrv_open(backup
->target
, NULL
, options
, flags
, errp
);
3518 bdrv_set_aio_context(target_bs
, aio_context
);
3520 if (set_backing_hd
) {
3521 bdrv_set_backing_hd(target_bs
, source
, &local_err
);
3523 bdrv_unref(target_bs
);
3528 if (backup
->has_bitmap
) {
3529 bmap
= bdrv_find_dirty_bitmap(bs
, backup
->bitmap
);
3531 error_setg(errp
, "Bitmap '%s' could not be found", backup
->bitmap
);
3532 bdrv_unref(target_bs
);
3535 if (bdrv_dirty_bitmap_check(bmap
, BDRV_BITMAP_DEFAULT
, errp
)) {
3539 if (!backup
->auto_finalize
) {
3540 job_flags
|= JOB_MANUAL_FINALIZE
;
3542 if (!backup
->auto_dismiss
) {
3543 job_flags
|= JOB_MANUAL_DISMISS
;
3546 job
= backup_job_create(backup
->job_id
, bs
, target_bs
, backup
->speed
,
3547 backup
->sync
, bmap
, backup
->compress
,
3548 backup
->on_source_error
, backup
->on_target_error
,
3549 job_flags
, NULL
, NULL
, txn
, &local_err
);
3550 bdrv_unref(target_bs
);
3551 if (local_err
!= NULL
) {
3552 error_propagate(errp
, local_err
);
3557 aio_context_release(aio_context
);
3561 void qmp_drive_backup(DriveBackup
*arg
, Error
**errp
)
3565 job
= do_drive_backup(arg
, NULL
, errp
);
3567 job_start(&job
->job
);
3571 BlockDeviceInfoList
*qmp_query_named_block_nodes(Error
**errp
)
3573 return bdrv_named_nodes_list(errp
);
3576 XDbgBlockGraph
*qmp_x_debug_query_block_graph(Error
**errp
)
3578 return bdrv_get_xdbg_block_graph(errp
);
3581 BlockJob
*do_blockdev_backup(BlockdevBackup
*backup
, JobTxn
*txn
,
3584 BlockDriverState
*bs
;
3585 BlockDriverState
*target_bs
;
3586 Error
*local_err
= NULL
;
3587 BdrvDirtyBitmap
*bmap
= NULL
;
3588 AioContext
*aio_context
;
3589 BlockJob
*job
= NULL
;
3590 int job_flags
= JOB_DEFAULT
;
3592 if (!backup
->has_speed
) {
3595 if (!backup
->has_on_source_error
) {
3596 backup
->on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
3598 if (!backup
->has_on_target_error
) {
3599 backup
->on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
3601 if (!backup
->has_job_id
) {
3602 backup
->job_id
= NULL
;
3604 if (!backup
->has_auto_finalize
) {
3605 backup
->auto_finalize
= true;
3607 if (!backup
->has_auto_dismiss
) {
3608 backup
->auto_dismiss
= true;
3610 if (!backup
->has_compress
) {
3611 backup
->compress
= false;
3614 bs
= bdrv_lookup_bs(backup
->device
, backup
->device
, errp
);
3619 aio_context
= bdrv_get_aio_context(bs
);
3620 aio_context_acquire(aio_context
);
3622 target_bs
= bdrv_lookup_bs(backup
->target
, backup
->target
, errp
);
3627 if (bdrv_get_aio_context(target_bs
) != aio_context
) {
3628 if (!bdrv_has_blk(target_bs
)) {
3629 /* The target BDS is not attached, we can safely move it to another
3631 bdrv_set_aio_context(target_bs
, aio_context
);
3633 error_setg(errp
, "Target is attached to a different thread from "
3639 if (backup
->has_bitmap
) {
3640 bmap
= bdrv_find_dirty_bitmap(bs
, backup
->bitmap
);
3642 error_setg(errp
, "Bitmap '%s' could not be found", backup
->bitmap
);
3645 if (bdrv_dirty_bitmap_check(bmap
, BDRV_BITMAP_DEFAULT
, errp
)) {
3650 if (!backup
->auto_finalize
) {
3651 job_flags
|= JOB_MANUAL_FINALIZE
;
3653 if (!backup
->auto_dismiss
) {
3654 job_flags
|= JOB_MANUAL_DISMISS
;
3656 job
= backup_job_create(backup
->job_id
, bs
, target_bs
, backup
->speed
,
3657 backup
->sync
, bmap
, backup
->compress
,
3658 backup
->on_source_error
, backup
->on_target_error
,
3659 job_flags
, NULL
, NULL
, txn
, &local_err
);
3660 if (local_err
!= NULL
) {
3661 error_propagate(errp
, local_err
);
3664 aio_context_release(aio_context
);
3668 void qmp_blockdev_backup(BlockdevBackup
*arg
, Error
**errp
)
3671 job
= do_blockdev_backup(arg
, NULL
, errp
);
3673 job_start(&job
->job
);
3677 /* Parameter check and block job starting for drive mirroring.
3678 * Caller should hold @device and @target's aio context (must be the same).
3680 static void blockdev_mirror_common(const char *job_id
, BlockDriverState
*bs
,
3681 BlockDriverState
*target
,
3682 bool has_replaces
, const char *replaces
,
3683 enum MirrorSyncMode sync
,
3684 BlockMirrorBackingMode backing_mode
,
3685 bool has_speed
, int64_t speed
,
3686 bool has_granularity
, uint32_t granularity
,
3687 bool has_buf_size
, int64_t buf_size
,
3688 bool has_on_source_error
,
3689 BlockdevOnError on_source_error
,
3690 bool has_on_target_error
,
3691 BlockdevOnError on_target_error
,
3692 bool has_unmap
, bool unmap
,
3693 bool has_filter_node_name
,
3694 const char *filter_node_name
,
3695 bool has_copy_mode
, MirrorCopyMode copy_mode
,
3696 bool has_auto_finalize
, bool auto_finalize
,
3697 bool has_auto_dismiss
, bool auto_dismiss
,
3700 int job_flags
= JOB_DEFAULT
;
3705 if (!has_on_source_error
) {
3706 on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
3708 if (!has_on_target_error
) {
3709 on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
3711 if (!has_granularity
) {
3714 if (!has_buf_size
) {
3720 if (!has_filter_node_name
) {
3721 filter_node_name
= NULL
;
3723 if (!has_copy_mode
) {
3724 copy_mode
= MIRROR_COPY_MODE_BACKGROUND
;
3726 if (has_auto_finalize
&& !auto_finalize
) {
3727 job_flags
|= JOB_MANUAL_FINALIZE
;
3729 if (has_auto_dismiss
&& !auto_dismiss
) {
3730 job_flags
|= JOB_MANUAL_DISMISS
;
3733 if (granularity
!= 0 && (granularity
< 512 || granularity
> 1048576 * 64)) {
3734 error_setg(errp
, QERR_INVALID_PARAMETER_VALUE
, "granularity",
3735 "a value in range [512B, 64MB]");
3738 if (granularity
& (granularity
- 1)) {
3739 error_setg(errp
, QERR_INVALID_PARAMETER_VALUE
, "granularity",
3744 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_MIRROR_SOURCE
, errp
)) {
3747 if (bdrv_op_is_blocked(target
, BLOCK_OP_TYPE_MIRROR_TARGET
, errp
)) {
3751 if (!bs
->backing
&& sync
== MIRROR_SYNC_MODE_TOP
) {
3752 sync
= MIRROR_SYNC_MODE_FULL
;
3756 BlockDriverState
*to_replace_bs
;
3757 AioContext
*replace_aio_context
;
3758 int64_t bs_size
, replace_size
;
3760 bs_size
= bdrv_getlength(bs
);
3762 error_setg_errno(errp
, -bs_size
, "Failed to query device's size");
3766 to_replace_bs
= check_to_replace_node(bs
, replaces
, errp
);
3767 if (!to_replace_bs
) {
3771 replace_aio_context
= bdrv_get_aio_context(to_replace_bs
);
3772 aio_context_acquire(replace_aio_context
);
3773 replace_size
= bdrv_getlength(to_replace_bs
);
3774 aio_context_release(replace_aio_context
);
3776 if (replace_size
< 0) {
3777 error_setg_errno(errp
, -replace_size
,
3778 "Failed to query the replacement node's size");
3781 if (bs_size
!= replace_size
) {
3782 error_setg(errp
, "cannot replace image with a mirror image of "
3788 /* pass the node name to replace to mirror start since it's loose coupling
3789 * and will allow to check whether the node still exist at mirror completion
3791 mirror_start(job_id
, bs
, target
,
3792 has_replaces
? replaces
: NULL
, job_flags
,
3793 speed
, granularity
, buf_size
, sync
, backing_mode
,
3794 on_source_error
, on_target_error
, unmap
, filter_node_name
,
3798 void qmp_drive_mirror(DriveMirror
*arg
, Error
**errp
)
3800 BlockDriverState
*bs
;
3801 BlockDriverState
*source
, *target_bs
;
3802 AioContext
*aio_context
;
3803 BlockMirrorBackingMode backing_mode
;
3804 Error
*local_err
= NULL
;
3805 QDict
*options
= NULL
;
3808 const char *format
= arg
->format
;
3810 bs
= qmp_get_root_bs(arg
->device
, errp
);
3815 /* Early check to avoid creating target */
3816 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_MIRROR_SOURCE
, errp
)) {
3820 aio_context
= bdrv_get_aio_context(bs
);
3821 aio_context_acquire(aio_context
);
3823 if (!arg
->has_mode
) {
3824 arg
->mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
3827 if (!arg
->has_format
) {
3828 format
= (arg
->mode
== NEW_IMAGE_MODE_EXISTING
3829 ? NULL
: bs
->drv
->format_name
);
3832 flags
= bs
->open_flags
| BDRV_O_RDWR
;
3833 source
= backing_bs(bs
);
3834 if (!source
&& arg
->sync
== MIRROR_SYNC_MODE_TOP
) {
3835 arg
->sync
= MIRROR_SYNC_MODE_FULL
;
3837 if (arg
->sync
== MIRROR_SYNC_MODE_NONE
) {
3841 size
= bdrv_getlength(bs
);
3843 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
3847 if (arg
->has_replaces
) {
3848 if (!arg
->has_node_name
) {
3849 error_setg(errp
, "a node-name must be provided when replacing a"
3850 " named node of the graph");
3855 if (arg
->mode
== NEW_IMAGE_MODE_ABSOLUTE_PATHS
) {
3856 backing_mode
= MIRROR_SOURCE_BACKING_CHAIN
;
3858 backing_mode
= MIRROR_OPEN_BACKING_CHAIN
;
3861 /* Don't open backing image in create() */
3862 flags
|= BDRV_O_NO_BACKING
;
3864 if ((arg
->sync
== MIRROR_SYNC_MODE_FULL
|| !source
)
3865 && arg
->mode
!= NEW_IMAGE_MODE_EXISTING
)
3867 /* create new image w/o backing file */
3869 bdrv_img_create(arg
->target
, format
,
3870 NULL
, NULL
, NULL
, size
, flags
, false, &local_err
);
3872 switch (arg
->mode
) {
3873 case NEW_IMAGE_MODE_EXISTING
:
3875 case NEW_IMAGE_MODE_ABSOLUTE_PATHS
:
3876 /* create new image with backing file */
3877 bdrv_refresh_filename(source
);
3878 bdrv_img_create(arg
->target
, format
,
3880 source
->drv
->format_name
,
3881 NULL
, size
, flags
, false, &local_err
);
3889 error_propagate(errp
, local_err
);
3893 options
= qdict_new();
3894 if (arg
->has_node_name
) {
3895 qdict_put_str(options
, "node-name", arg
->node_name
);
3898 qdict_put_str(options
, "driver", format
);
3901 /* Mirroring takes care of copy-on-write using the source's backing
3904 target_bs
= bdrv_open(arg
->target
, NULL
, options
, flags
, errp
);
3909 bdrv_set_aio_context(target_bs
, aio_context
);
3911 blockdev_mirror_common(arg
->has_job_id
? arg
->job_id
: NULL
, bs
, target_bs
,
3912 arg
->has_replaces
, arg
->replaces
, arg
->sync
,
3913 backing_mode
, arg
->has_speed
, arg
->speed
,
3914 arg
->has_granularity
, arg
->granularity
,
3915 arg
->has_buf_size
, arg
->buf_size
,
3916 arg
->has_on_source_error
, arg
->on_source_error
,
3917 arg
->has_on_target_error
, arg
->on_target_error
,
3918 arg
->has_unmap
, arg
->unmap
,
3920 arg
->has_copy_mode
, arg
->copy_mode
,
3921 arg
->has_auto_finalize
, arg
->auto_finalize
,
3922 arg
->has_auto_dismiss
, arg
->auto_dismiss
,
3924 bdrv_unref(target_bs
);
3925 error_propagate(errp
, local_err
);
3927 aio_context_release(aio_context
);
3930 void qmp_blockdev_mirror(bool has_job_id
, const char *job_id
,
3931 const char *device
, const char *target
,
3932 bool has_replaces
, const char *replaces
,
3933 MirrorSyncMode sync
,
3934 bool has_speed
, int64_t speed
,
3935 bool has_granularity
, uint32_t granularity
,
3936 bool has_buf_size
, int64_t buf_size
,
3937 bool has_on_source_error
,
3938 BlockdevOnError on_source_error
,
3939 bool has_on_target_error
,
3940 BlockdevOnError on_target_error
,
3941 bool has_filter_node_name
,
3942 const char *filter_node_name
,
3943 bool has_copy_mode
, MirrorCopyMode copy_mode
,
3944 bool has_auto_finalize
, bool auto_finalize
,
3945 bool has_auto_dismiss
, bool auto_dismiss
,
3948 BlockDriverState
*bs
;
3949 BlockDriverState
*target_bs
;
3950 AioContext
*aio_context
;
3951 BlockMirrorBackingMode backing_mode
= MIRROR_LEAVE_BACKING_CHAIN
;
3952 Error
*local_err
= NULL
;
3954 bs
= qmp_get_root_bs(device
, errp
);
3959 target_bs
= bdrv_lookup_bs(target
, target
, errp
);
3964 aio_context
= bdrv_get_aio_context(bs
);
3965 aio_context_acquire(aio_context
);
3967 bdrv_set_aio_context(target_bs
, aio_context
);
3969 blockdev_mirror_common(has_job_id
? job_id
: NULL
, bs
, target_bs
,
3970 has_replaces
, replaces
, sync
, backing_mode
,
3972 has_granularity
, granularity
,
3973 has_buf_size
, buf_size
,
3974 has_on_source_error
, on_source_error
,
3975 has_on_target_error
, on_target_error
,
3977 has_filter_node_name
, filter_node_name
,
3978 has_copy_mode
, copy_mode
,
3979 has_auto_finalize
, auto_finalize
,
3980 has_auto_dismiss
, auto_dismiss
,
3982 error_propagate(errp
, local_err
);
3984 aio_context_release(aio_context
);
3987 /* Get a block job using its ID and acquire its AioContext */
3988 static BlockJob
*find_block_job(const char *id
, AioContext
**aio_context
,
3995 *aio_context
= NULL
;
3997 job
= block_job_get(id
);
4000 error_set(errp
, ERROR_CLASS_DEVICE_NOT_ACTIVE
,
4001 "Block job '%s' not found", id
);
4005 *aio_context
= blk_get_aio_context(job
->blk
);
4006 aio_context_acquire(*aio_context
);
4011 void qmp_block_job_set_speed(const char *device
, int64_t speed
, Error
**errp
)
4013 AioContext
*aio_context
;
4014 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
4020 block_job_set_speed(job
, speed
, errp
);
4021 aio_context_release(aio_context
);
4024 void qmp_block_job_cancel(const char *device
,
4025 bool has_force
, bool force
, Error
**errp
)
4027 AioContext
*aio_context
;
4028 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
4038 if (job_user_paused(&job
->job
) && !force
) {
4039 error_setg(errp
, "The block job for device '%s' is currently paused",
4044 trace_qmp_block_job_cancel(job
);
4045 job_user_cancel(&job
->job
, force
, errp
);
4047 aio_context_release(aio_context
);
4050 void qmp_block_job_pause(const char *device
, Error
**errp
)
4052 AioContext
*aio_context
;
4053 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
4059 trace_qmp_block_job_pause(job
);
4060 job_user_pause(&job
->job
, errp
);
4061 aio_context_release(aio_context
);
4064 void qmp_block_job_resume(const char *device
, Error
**errp
)
4066 AioContext
*aio_context
;
4067 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
4073 trace_qmp_block_job_resume(job
);
4074 job_user_resume(&job
->job
, errp
);
4075 aio_context_release(aio_context
);
4078 void qmp_block_job_complete(const char *device
, Error
**errp
)
4080 AioContext
*aio_context
;
4081 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
4087 trace_qmp_block_job_complete(job
);
4088 job_complete(&job
->job
, errp
);
4089 aio_context_release(aio_context
);
4092 void qmp_block_job_finalize(const char *id
, Error
**errp
)
4094 AioContext
*aio_context
;
4095 BlockJob
*job
= find_block_job(id
, &aio_context
, errp
);
4101 trace_qmp_block_job_finalize(job
);
4102 job_finalize(&job
->job
, errp
);
4103 aio_context_release(aio_context
);
4106 void qmp_block_job_dismiss(const char *id
, Error
**errp
)
4108 AioContext
*aio_context
;
4109 BlockJob
*bjob
= find_block_job(id
, &aio_context
, errp
);
4116 trace_qmp_block_job_dismiss(bjob
);
4118 job_dismiss(&job
, errp
);
4119 aio_context_release(aio_context
);
4122 void qmp_change_backing_file(const char *device
,
4123 const char *image_node_name
,
4124 const char *backing_file
,
4127 BlockDriverState
*bs
= NULL
;
4128 AioContext
*aio_context
;
4129 BlockDriverState
*image_bs
= NULL
;
4130 Error
*local_err
= NULL
;
4134 bs
= qmp_get_root_bs(device
, errp
);
4139 aio_context
= bdrv_get_aio_context(bs
);
4140 aio_context_acquire(aio_context
);
4142 image_bs
= bdrv_lookup_bs(NULL
, image_node_name
, &local_err
);
4144 error_propagate(errp
, local_err
);
4149 error_setg(errp
, "image file not found");
4153 if (bdrv_find_base(image_bs
) == image_bs
) {
4154 error_setg(errp
, "not allowing backing file change on an image "
4155 "without a backing file");
4159 /* even though we are not necessarily operating on bs, we need it to
4160 * determine if block ops are currently prohibited on the chain */
4161 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_CHANGE
, errp
)) {
4165 /* final sanity check */
4166 if (!bdrv_chain_contains(bs
, image_bs
)) {
4167 error_setg(errp
, "'%s' and image file are not in the same chain",
4172 /* if not r/w, reopen to make r/w */
4173 ro
= bdrv_is_read_only(image_bs
);
4176 if (bdrv_reopen_set_read_only(image_bs
, false, errp
) != 0) {
4181 ret
= bdrv_change_backing_file(image_bs
, backing_file
,
4182 image_bs
->drv
? image_bs
->drv
->format_name
: "");
4185 error_setg_errno(errp
, -ret
, "Could not change backing file to '%s'",
4187 /* don't exit here, so we can try to restore open flags if
4192 bdrv_reopen_set_read_only(image_bs
, true, &local_err
);
4193 error_propagate(errp
, local_err
);
4197 aio_context_release(aio_context
);
4200 void hmp_drive_add_node(Monitor
*mon
, const char *optstr
)
4204 Error
*local_err
= NULL
;
4206 opts
= qemu_opts_parse_noisily(&qemu_drive_opts
, optstr
, false);
4211 qdict
= qemu_opts_to_qdict(opts
, NULL
);
4213 if (!qdict_get_try_str(qdict
, "node-name")) {
4214 qobject_unref(qdict
);
4215 error_report("'node-name' needs to be specified");
4219 BlockDriverState
*bs
= bds_tree_init(qdict
, &local_err
);
4221 error_report_err(local_err
);
4225 QTAILQ_INSERT_TAIL(&monitor_bdrv_states
, bs
, monitor_list
);
4228 qemu_opts_del(opts
);
4231 void qmp_blockdev_add(BlockdevOptions
*options
, Error
**errp
)
4233 BlockDriverState
*bs
;
4235 Visitor
*v
= qobject_output_visitor_new(&obj
);
4237 Error
*local_err
= NULL
;
4239 visit_type_BlockdevOptions(v
, NULL
, &options
, &local_err
);
4241 error_propagate(errp
, local_err
);
4245 visit_complete(v
, &obj
);
4246 qdict
= qobject_to(QDict
, obj
);
4248 qdict_flatten(qdict
);
4250 if (!qdict_get_try_str(qdict
, "node-name")) {
4251 error_setg(errp
, "'node-name' must be specified for the root node");
4255 bs
= bds_tree_init(qdict
, errp
);
4260 QTAILQ_INSERT_TAIL(&monitor_bdrv_states
, bs
, monitor_list
);
4266 void qmp_x_blockdev_reopen(BlockdevOptions
*options
, Error
**errp
)
4268 BlockDriverState
*bs
;
4271 Visitor
*v
= qobject_output_visitor_new(&obj
);
4272 Error
*local_err
= NULL
;
4273 BlockReopenQueue
*queue
;
4276 /* Check for the selected node name */
4277 if (!options
->has_node_name
) {
4278 error_setg(errp
, "Node name not specified");
4282 bs
= bdrv_find_node(options
->node_name
);
4284 error_setg(errp
, "Cannot find node named '%s'", options
->node_name
);
4288 /* Put all options in a QDict and flatten it */
4289 visit_type_BlockdevOptions(v
, NULL
, &options
, &local_err
);
4291 error_propagate(errp
, local_err
);
4295 visit_complete(v
, &obj
);
4296 qdict
= qobject_to(QDict
, obj
);
4298 qdict_flatten(qdict
);
4300 /* Perform the reopen operation */
4301 ctx
= bdrv_get_aio_context(bs
);
4302 aio_context_acquire(ctx
);
4303 bdrv_subtree_drained_begin(bs
);
4304 queue
= bdrv_reopen_queue(NULL
, bs
, qdict
, false);
4305 bdrv_reopen_multiple(queue
, errp
);
4306 bdrv_subtree_drained_end(bs
);
4307 aio_context_release(ctx
);
4313 void qmp_blockdev_del(const char *node_name
, Error
**errp
)
4315 AioContext
*aio_context
;
4316 BlockDriverState
*bs
;
4318 bs
= bdrv_find_node(node_name
);
4320 error_setg(errp
, "Cannot find node %s", node_name
);
4323 if (bdrv_has_blk(bs
)) {
4324 error_setg(errp
, "Node %s is in use", node_name
);
4327 aio_context
= bdrv_get_aio_context(bs
);
4328 aio_context_acquire(aio_context
);
4330 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_DRIVE_DEL
, errp
)) {
4334 if (!QTAILQ_IN_USE(bs
, monitor_list
)) {
4335 error_setg(errp
, "Node %s is not owned by the monitor",
4340 if (bs
->refcnt
> 1) {
4341 error_setg(errp
, "Block device %s is in use",
4342 bdrv_get_device_or_node_name(bs
));
4346 QTAILQ_REMOVE(&monitor_bdrv_states
, bs
, monitor_list
);
4350 aio_context_release(aio_context
);
4353 static BdrvChild
*bdrv_find_child(BlockDriverState
*parent_bs
,
4354 const char *child_name
)
4358 QLIST_FOREACH(child
, &parent_bs
->children
, next
) {
4359 if (strcmp(child
->name
, child_name
) == 0) {
4367 void qmp_x_blockdev_change(const char *parent
, bool has_child
,
4368 const char *child
, bool has_node
,
4369 const char *node
, Error
**errp
)
4371 BlockDriverState
*parent_bs
, *new_bs
= NULL
;
4374 parent_bs
= bdrv_lookup_bs(parent
, parent
, errp
);
4379 if (has_child
== has_node
) {
4381 error_setg(errp
, "The parameters child and node are in conflict");
4383 error_setg(errp
, "Either child or node must be specified");
4389 p_child
= bdrv_find_child(parent_bs
, child
);
4391 error_setg(errp
, "Node '%s' does not have child '%s'",
4395 bdrv_del_child(parent_bs
, p_child
, errp
);
4399 new_bs
= bdrv_find_node(node
);
4401 error_setg(errp
, "Node '%s' not found", node
);
4404 bdrv_add_child(parent_bs
, new_bs
, errp
);
4408 BlockJobInfoList
*qmp_query_block_jobs(Error
**errp
)
4410 BlockJobInfoList
*head
= NULL
, **p_next
= &head
;
4413 for (job
= block_job_next(NULL
); job
; job
= block_job_next(job
)) {
4414 BlockJobInfoList
*elem
;
4415 AioContext
*aio_context
;
4417 if (block_job_is_internal(job
)) {
4420 elem
= g_new0(BlockJobInfoList
, 1);
4421 aio_context
= blk_get_aio_context(job
->blk
);
4422 aio_context_acquire(aio_context
);
4423 elem
->value
= block_job_query(job
, errp
);
4424 aio_context_release(aio_context
);
4427 qapi_free_BlockJobInfoList(head
);
4431 p_next
= &elem
->next
;
4437 void qmp_x_blockdev_set_iothread(const char *node_name
, StrOrNull
*iothread
,
4438 bool has_force
, bool force
, Error
**errp
)
4440 AioContext
*old_context
;
4441 AioContext
*new_context
;
4442 BlockDriverState
*bs
;
4444 bs
= bdrv_find_node(node_name
);
4446 error_setg(errp
, "Cannot find node %s", node_name
);
4450 /* Protects against accidents. */
4451 if (!(has_force
&& force
) && bdrv_has_blk(bs
)) {
4452 error_setg(errp
, "Node %s is associated with a BlockBackend and could "
4453 "be in use (use force=true to override this check)",
4458 if (iothread
->type
== QTYPE_QSTRING
) {
4459 IOThread
*obj
= iothread_by_id(iothread
->u
.s
);
4461 error_setg(errp
, "Cannot find iothread %s", iothread
->u
.s
);
4465 new_context
= iothread_get_aio_context(obj
);
4467 new_context
= qemu_get_aio_context();
4470 old_context
= bdrv_get_aio_context(bs
);
4471 aio_context_acquire(old_context
);
4473 bdrv_set_aio_context(bs
, new_context
);
4475 aio_context_release(old_context
);
4478 void qmp_block_latency_histogram_set(
4480 bool has_boundaries
, uint64List
*boundaries
,
4481 bool has_boundaries_read
, uint64List
*boundaries_read
,
4482 bool has_boundaries_write
, uint64List
*boundaries_write
,
4483 bool has_boundaries_flush
, uint64List
*boundaries_flush
,
4486 BlockBackend
*blk
= qmp_get_blk(NULL
, id
, errp
);
4487 BlockAcctStats
*stats
;
4494 stats
= blk_get_stats(blk
);
4496 if (!has_boundaries
&& !has_boundaries_read
&& !has_boundaries_write
&&
4497 !has_boundaries_flush
)
4499 block_latency_histograms_clear(stats
);
4503 if (has_boundaries
|| has_boundaries_read
) {
4504 ret
= block_latency_histogram_set(
4505 stats
, BLOCK_ACCT_READ
,
4506 has_boundaries_read
? boundaries_read
: boundaries
);
4508 error_setg(errp
, "Device '%s' set read boundaries fail", id
);
4513 if (has_boundaries
|| has_boundaries_write
) {
4514 ret
= block_latency_histogram_set(
4515 stats
, BLOCK_ACCT_WRITE
,
4516 has_boundaries_write
? boundaries_write
: boundaries
);
4518 error_setg(errp
, "Device '%s' set write boundaries fail", id
);
4523 if (has_boundaries
|| has_boundaries_flush
) {
4524 ret
= block_latency_histogram_set(
4525 stats
, BLOCK_ACCT_FLUSH
,
4526 has_boundaries_flush
? boundaries_flush
: boundaries
);
4528 error_setg(errp
, "Device '%s' set flush boundaries fail", id
);
4534 QemuOptsList qemu_common_drive_opts
= {
4536 .head
= QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts
.head
),
4540 .type
= QEMU_OPT_BOOL
,
4541 .help
= "enable/disable snapshot mode",
4544 .type
= QEMU_OPT_STRING
,
4545 .help
= "host AIO implementation (threads, native)",
4547 .name
= BDRV_OPT_CACHE_WB
,
4548 .type
= QEMU_OPT_BOOL
,
4549 .help
= "Enable writeback mode",
4552 .type
= QEMU_OPT_STRING
,
4553 .help
= "disk format (raw, qcow2, ...)",
4556 .type
= QEMU_OPT_STRING
,
4557 .help
= "read error action",
4560 .type
= QEMU_OPT_STRING
,
4561 .help
= "write error action",
4563 .name
= BDRV_OPT_READ_ONLY
,
4564 .type
= QEMU_OPT_BOOL
,
4565 .help
= "open drive file as read-only",
4571 .name
= "throttling.group",
4572 .type
= QEMU_OPT_STRING
,
4573 .help
= "name of the block throttling group",
4575 .name
= "copy-on-read",
4576 .type
= QEMU_OPT_BOOL
,
4577 .help
= "copy read data from backing file into image file",
4579 .name
= "detect-zeroes",
4580 .type
= QEMU_OPT_STRING
,
4581 .help
= "try to optimize zero writes (off, on, unmap)",
4583 .name
= "stats-account-invalid",
4584 .type
= QEMU_OPT_BOOL
,
4585 .help
= "whether to account for invalid I/O operations "
4586 "in the statistics",
4588 .name
= "stats-account-failed",
4589 .type
= QEMU_OPT_BOOL
,
4590 .help
= "whether to account for failed I/O operations "
4591 "in the statistics",
4593 { /* end of list */ }
4597 QemuOptsList qemu_drive_opts
= {
4599 .head
= QTAILQ_HEAD_INITIALIZER(qemu_drive_opts
.head
),
4602 * no elements => accept any params
4603 * validation will happen later
4605 { /* end of list */ }