2 * QEMU host block devices
4 * Copyright (c) 2003-2008 Fabrice Bellard
6 * This work is licensed under the terms of the GNU GPL, version 2 or
7 * later. See the COPYING file in the top-level directory.
9 * This file incorporates work covered by the following copyright and
12 * Copyright (c) 2003-2008 Fabrice Bellard
14 * Permission is hereby granted, free of charge, to any person obtaining a copy
15 * of this software and associated documentation files (the "Software"), to deal
16 * in the Software without restriction, including without limitation the rights
17 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
18 * copies of the Software, and to permit persons to whom the Software is
19 * furnished to do so, subject to the following conditions:
21 * The above copyright notice and this permission notice shall be included in
22 * all copies or substantial portions of the Software.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
27 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
28 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
29 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
33 #include "qemu/osdep.h"
34 #include "sysemu/block-backend.h"
35 #include "sysemu/blockdev.h"
36 #include "hw/block/block.h"
37 #include "block/blockjob.h"
38 #include "block/qdict.h"
39 #include "block/throttle-groups.h"
40 #include "monitor/monitor.h"
41 #include "qemu/error-report.h"
42 #include "qemu/option.h"
43 #include "qemu/qemu-print.h"
44 #include "qemu/config-file.h"
45 #include "qapi/qapi-commands-block.h"
46 #include "qapi/qapi-commands-transaction.h"
47 #include "qapi/qapi-visit-block-core.h"
48 #include "qapi/qmp/qdict.h"
49 #include "qapi/qmp/qnum.h"
50 #include "qapi/qmp/qstring.h"
51 #include "qapi/error.h"
52 #include "qapi/qmp/qerror.h"
53 #include "qapi/qmp/qlist.h"
54 #include "qapi/qobject-output-visitor.h"
55 #include "sysemu/sysemu.h"
56 #include "sysemu/iothread.h"
57 #include "block/block_int.h"
58 #include "block/trace.h"
59 #include "sysemu/arch_init.h"
60 #include "sysemu/qtest.h"
61 #include "qemu/cutils.h"
62 #include "qemu/help_option.h"
63 #include "qemu/throttle-options.h"
65 static QTAILQ_HEAD(, BlockDriverState
) monitor_bdrv_states
=
66 QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states
);
68 static int do_open_tray(const char *blk_name
, const char *qdev_id
,
69 bool force
, Error
**errp
);
70 static void blockdev_remove_medium(bool has_device
, const char *device
,
71 bool has_id
, const char *id
, Error
**errp
);
72 static void blockdev_insert_medium(bool has_device
, const char *device
,
73 bool has_id
, const char *id
,
74 const char *node_name
, Error
**errp
);
76 static const char *const if_name
[IF_COUNT
] = {
80 [IF_FLOPPY
] = "floppy",
81 [IF_PFLASH
] = "pflash",
84 [IF_VIRTIO
] = "virtio",
88 static int if_max_devs
[IF_COUNT
] = {
90 * Do not change these numbers! They govern how drive option
91 * index maps to unit and bus. That mapping is ABI.
93 * All controllers used to implement if=T drives need to support
94 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
95 * Otherwise, some index values map to "impossible" bus, unit
98 * For instance, if you change [IF_SCSI] to 255, -drive
99 * if=scsi,index=12 no longer means bus=1,unit=5, but
100 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
101 * the drive can't be set up. Regression.
108 * Boards may call this to offer board-by-board overrides
109 * of the default, global values.
111 void override_max_devs(BlockInterfaceType type
, int max_devs
)
120 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
121 dinfo
= blk_legacy_dinfo(blk
);
122 if (dinfo
->type
== type
) {
123 fprintf(stderr
, "Cannot override units-per-bus property of"
124 " the %s interface, because a drive of that type has"
125 " already been added.\n", if_name
[type
]);
126 g_assert_not_reached();
130 if_max_devs
[type
] = max_devs
;
134 * We automatically delete the drive when a device using it gets
135 * unplugged. Questionable feature, but we can't just drop it.
136 * Device models call blockdev_mark_auto_del() to schedule the
137 * automatic deletion, and generic qdev code calls blockdev_auto_del()
138 * when deletion is actually safe.
140 void blockdev_mark_auto_del(BlockBackend
*blk
)
142 DriveInfo
*dinfo
= blk_legacy_dinfo(blk
);
143 BlockDriverState
*bs
= blk_bs(blk
);
144 AioContext
*aio_context
;
151 aio_context
= bdrv_get_aio_context(bs
);
152 aio_context_acquire(aio_context
);
155 job_cancel(&bs
->job
->job
, false);
158 aio_context_release(aio_context
);
164 void blockdev_auto_del(BlockBackend
*blk
)
166 DriveInfo
*dinfo
= blk_legacy_dinfo(blk
);
168 if (dinfo
&& dinfo
->auto_del
) {
169 monitor_remove_blk(blk
);
175 * Returns the current mapping of how many units per bus
176 * a particular interface can support.
178 * A positive integer indicates n units per bus.
179 * 0 implies the mapping has not been established.
180 * -1 indicates an invalid BlockInterfaceType was given.
182 int drive_get_max_devs(BlockInterfaceType type
)
184 if (type
>= IF_IDE
&& type
< IF_COUNT
) {
185 return if_max_devs
[type
];
191 static int drive_index_to_bus_id(BlockInterfaceType type
, int index
)
193 int max_devs
= if_max_devs
[type
];
194 return max_devs
? index
/ max_devs
: 0;
197 static int drive_index_to_unit_id(BlockInterfaceType type
, int index
)
199 int max_devs
= if_max_devs
[type
];
200 return max_devs
? index
% max_devs
: index
;
203 QemuOpts
*drive_def(const char *optstr
)
205 return qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr
, false);
208 QemuOpts
*drive_add(BlockInterfaceType type
, int index
, const char *file
,
213 opts
= drive_def(optstr
);
217 if (type
!= IF_DEFAULT
) {
218 qemu_opt_set(opts
, "if", if_name
[type
], &error_abort
);
221 qemu_opt_set_number(opts
, "index", index
, &error_abort
);
224 qemu_opt_set(opts
, "file", file
, &error_abort
);
228 DriveInfo
*drive_get(BlockInterfaceType type
, int bus
, int unit
)
233 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
234 dinfo
= blk_legacy_dinfo(blk
);
235 if (dinfo
&& dinfo
->type
== type
236 && dinfo
->bus
== bus
&& dinfo
->unit
== unit
) {
244 void drive_check_orphaned(void)
249 bool orphans
= false;
251 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
252 dinfo
= blk_legacy_dinfo(blk
);
253 if (!blk_get_attached_dev(blk
) && !dinfo
->is_default
&&
254 dinfo
->type
!= IF_NONE
) {
256 qemu_opts_loc_restore(dinfo
->opts
);
257 error_report("machine type does not support"
258 " if=%s,bus=%d,unit=%d",
259 if_name
[dinfo
->type
], dinfo
->bus
, dinfo
->unit
);
270 DriveInfo
*drive_get_by_index(BlockInterfaceType type
, int index
)
272 return drive_get(type
,
273 drive_index_to_bus_id(type
, index
),
274 drive_index_to_unit_id(type
, index
));
277 int drive_get_max_bus(BlockInterfaceType type
)
284 for (blk
= blk_next(NULL
); blk
; blk
= blk_next(blk
)) {
285 dinfo
= blk_legacy_dinfo(blk
);
286 if (dinfo
&& dinfo
->type
== type
&& dinfo
->bus
> max_bus
) {
287 max_bus
= dinfo
->bus
;
293 /* Get a block device. This should only be used for single-drive devices
294 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
296 DriveInfo
*drive_get_next(BlockInterfaceType type
)
298 static int next_block_unit
[IF_COUNT
];
300 return drive_get(type
, 0, next_block_unit
[type
]++);
303 static void bdrv_format_print(void *opaque
, const char *name
)
305 qemu_printf(" %s", name
);
310 BlockDriverState
*bs
;
313 static int parse_block_error_action(const char *buf
, bool is_read
, Error
**errp
)
315 if (!strcmp(buf
, "ignore")) {
316 return BLOCKDEV_ON_ERROR_IGNORE
;
317 } else if (!is_read
&& !strcmp(buf
, "enospc")) {
318 return BLOCKDEV_ON_ERROR_ENOSPC
;
319 } else if (!strcmp(buf
, "stop")) {
320 return BLOCKDEV_ON_ERROR_STOP
;
321 } else if (!strcmp(buf
, "report")) {
322 return BLOCKDEV_ON_ERROR_REPORT
;
324 error_setg(errp
, "'%s' invalid %s error action",
325 buf
, is_read
? "read" : "write");
330 static bool parse_stats_intervals(BlockAcctStats
*stats
, QList
*intervals
,
333 const QListEntry
*entry
;
334 for (entry
= qlist_first(intervals
); entry
; entry
= qlist_next(entry
)) {
335 switch (qobject_type(entry
->value
)) {
337 case QTYPE_QSTRING
: {
338 unsigned long long length
;
339 const char *str
= qstring_get_str(qobject_to(QString
,
341 if (parse_uint_full(str
, &length
, 10) == 0 &&
342 length
> 0 && length
<= UINT_MAX
) {
343 block_acct_add_interval(stats
, (unsigned) length
);
345 error_setg(errp
, "Invalid interval length: %s", str
);
352 int64_t length
= qnum_get_int(qobject_to(QNum
, entry
->value
));
354 if (length
> 0 && length
<= UINT_MAX
) {
355 block_acct_add_interval(stats
, (unsigned) length
);
357 error_setg(errp
, "Invalid interval length: %" PRId64
, length
);
364 error_setg(errp
, "The specification of stats-intervals is invalid");
371 typedef enum { MEDIA_DISK
, MEDIA_CDROM
} DriveMediaType
;
373 /* All parameters but @opts are optional and may be set to NULL. */
374 static void extract_common_blockdev_options(QemuOpts
*opts
, int *bdrv_flags
,
375 const char **throttling_group
, ThrottleConfig
*throttle_cfg
,
376 BlockdevDetectZeroesOptions
*detect_zeroes
, Error
**errp
)
378 Error
*local_error
= NULL
;
382 if (qemu_opt_get_bool(opts
, "copy-on-read", false)) {
383 *bdrv_flags
|= BDRV_O_COPY_ON_READ
;
386 if ((aio
= qemu_opt_get(opts
, "aio")) != NULL
) {
387 if (!strcmp(aio
, "native")) {
388 *bdrv_flags
|= BDRV_O_NATIVE_AIO
;
389 } else if (!strcmp(aio
, "threads")) {
390 /* this is the default */
392 error_setg(errp
, "invalid aio option");
398 /* disk I/O throttling */
399 if (throttling_group
) {
400 *throttling_group
= qemu_opt_get(opts
, "throttling.group");
404 throttle_config_init(throttle_cfg
);
405 throttle_cfg
->buckets
[THROTTLE_BPS_TOTAL
].avg
=
406 qemu_opt_get_number(opts
, "throttling.bps-total", 0);
407 throttle_cfg
->buckets
[THROTTLE_BPS_READ
].avg
=
408 qemu_opt_get_number(opts
, "throttling.bps-read", 0);
409 throttle_cfg
->buckets
[THROTTLE_BPS_WRITE
].avg
=
410 qemu_opt_get_number(opts
, "throttling.bps-write", 0);
411 throttle_cfg
->buckets
[THROTTLE_OPS_TOTAL
].avg
=
412 qemu_opt_get_number(opts
, "throttling.iops-total", 0);
413 throttle_cfg
->buckets
[THROTTLE_OPS_READ
].avg
=
414 qemu_opt_get_number(opts
, "throttling.iops-read", 0);
415 throttle_cfg
->buckets
[THROTTLE_OPS_WRITE
].avg
=
416 qemu_opt_get_number(opts
, "throttling.iops-write", 0);
418 throttle_cfg
->buckets
[THROTTLE_BPS_TOTAL
].max
=
419 qemu_opt_get_number(opts
, "throttling.bps-total-max", 0);
420 throttle_cfg
->buckets
[THROTTLE_BPS_READ
].max
=
421 qemu_opt_get_number(opts
, "throttling.bps-read-max", 0);
422 throttle_cfg
->buckets
[THROTTLE_BPS_WRITE
].max
=
423 qemu_opt_get_number(opts
, "throttling.bps-write-max", 0);
424 throttle_cfg
->buckets
[THROTTLE_OPS_TOTAL
].max
=
425 qemu_opt_get_number(opts
, "throttling.iops-total-max", 0);
426 throttle_cfg
->buckets
[THROTTLE_OPS_READ
].max
=
427 qemu_opt_get_number(opts
, "throttling.iops-read-max", 0);
428 throttle_cfg
->buckets
[THROTTLE_OPS_WRITE
].max
=
429 qemu_opt_get_number(opts
, "throttling.iops-write-max", 0);
431 throttle_cfg
->buckets
[THROTTLE_BPS_TOTAL
].burst_length
=
432 qemu_opt_get_number(opts
, "throttling.bps-total-max-length", 1);
433 throttle_cfg
->buckets
[THROTTLE_BPS_READ
].burst_length
=
434 qemu_opt_get_number(opts
, "throttling.bps-read-max-length", 1);
435 throttle_cfg
->buckets
[THROTTLE_BPS_WRITE
].burst_length
=
436 qemu_opt_get_number(opts
, "throttling.bps-write-max-length", 1);
437 throttle_cfg
->buckets
[THROTTLE_OPS_TOTAL
].burst_length
=
438 qemu_opt_get_number(opts
, "throttling.iops-total-max-length", 1);
439 throttle_cfg
->buckets
[THROTTLE_OPS_READ
].burst_length
=
440 qemu_opt_get_number(opts
, "throttling.iops-read-max-length", 1);
441 throttle_cfg
->buckets
[THROTTLE_OPS_WRITE
].burst_length
=
442 qemu_opt_get_number(opts
, "throttling.iops-write-max-length", 1);
444 throttle_cfg
->op_size
=
445 qemu_opt_get_number(opts
, "throttling.iops-size", 0);
447 if (!throttle_is_valid(throttle_cfg
, errp
)) {
454 qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup
,
455 qemu_opt_get(opts
, "detect-zeroes"),
456 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF
,
459 error_propagate(errp
, local_error
);
465 /* Takes the ownership of bs_opts */
466 static BlockBackend
*blockdev_init(const char *file
, QDict
*bs_opts
,
471 int on_read_error
, on_write_error
;
472 bool account_invalid
, account_failed
;
473 bool writethrough
, read_only
;
475 BlockDriverState
*bs
;
480 QDict
*interval_dict
= NULL
;
481 QList
*interval_list
= NULL
;
483 BlockdevDetectZeroesOptions detect_zeroes
=
484 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF
;
485 const char *throttling_group
= NULL
;
487 /* Check common options by copying from bs_opts to opts, all other options
488 * stay in bs_opts for processing by bdrv_open(). */
489 id
= qdict_get_try_str(bs_opts
, "id");
490 opts
= qemu_opts_create(&qemu_common_drive_opts
, id
, 1, &error
);
492 error_propagate(errp
, error
);
496 qemu_opts_absorb_qdict(opts
, bs_opts
, &error
);
498 error_propagate(errp
, error
);
503 qdict_del(bs_opts
, "id");
506 /* extract parameters */
507 snapshot
= qemu_opt_get_bool(opts
, "snapshot", 0);
509 account_invalid
= qemu_opt_get_bool(opts
, "stats-account-invalid", true);
510 account_failed
= qemu_opt_get_bool(opts
, "stats-account-failed", true);
512 writethrough
= !qemu_opt_get_bool(opts
, BDRV_OPT_CACHE_WB
, true);
514 id
= qemu_opts_id(opts
);
516 qdict_extract_subqdict(bs_opts
, &interval_dict
, "stats-intervals.");
517 qdict_array_split(interval_dict
, &interval_list
);
519 if (qdict_size(interval_dict
) != 0) {
520 error_setg(errp
, "Invalid option stats-intervals.%s",
521 qdict_first(interval_dict
)->key
);
525 extract_common_blockdev_options(opts
, &bdrv_flags
, &throttling_group
, &cfg
,
526 &detect_zeroes
, &error
);
528 error_propagate(errp
, error
);
532 if ((buf
= qemu_opt_get(opts
, "format")) != NULL
) {
533 if (is_help_option(buf
)) {
534 qemu_printf("Supported formats:");
535 bdrv_iterate_format(bdrv_format_print
, NULL
, false);
536 qemu_printf("\nSupported formats (read-only):");
537 bdrv_iterate_format(bdrv_format_print
, NULL
, true);
542 if (qdict_haskey(bs_opts
, "driver")) {
543 error_setg(errp
, "Cannot specify both 'driver' and 'format'");
546 qdict_put_str(bs_opts
, "driver", buf
);
549 on_write_error
= BLOCKDEV_ON_ERROR_ENOSPC
;
550 if ((buf
= qemu_opt_get(opts
, "werror")) != NULL
) {
551 on_write_error
= parse_block_error_action(buf
, 0, &error
);
553 error_propagate(errp
, error
);
558 on_read_error
= BLOCKDEV_ON_ERROR_REPORT
;
559 if ((buf
= qemu_opt_get(opts
, "rerror")) != NULL
) {
560 on_read_error
= parse_block_error_action(buf
, 1, &error
);
562 error_propagate(errp
, error
);
568 bdrv_flags
|= BDRV_O_SNAPSHOT
;
571 read_only
= qemu_opt_get_bool(opts
, BDRV_OPT_READ_ONLY
, false);
574 if ((!file
|| !*file
) && !qdict_size(bs_opts
)) {
575 BlockBackendRootState
*blk_rs
;
577 blk
= blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL
);
578 blk_rs
= blk_get_root_state(blk
);
579 blk_rs
->open_flags
= bdrv_flags
;
580 blk_rs
->read_only
= read_only
;
581 blk_rs
->detect_zeroes
= detect_zeroes
;
583 qobject_unref(bs_opts
);
585 if (file
&& !*file
) {
589 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
590 * with other callers) rather than what we want as the real defaults.
591 * Apply the defaults here instead. */
592 qdict_set_default_str(bs_opts
, BDRV_OPT_CACHE_DIRECT
, "off");
593 qdict_set_default_str(bs_opts
, BDRV_OPT_CACHE_NO_FLUSH
, "off");
594 qdict_set_default_str(bs_opts
, BDRV_OPT_READ_ONLY
,
595 read_only
? "on" : "off");
596 qdict_set_default_str(bs_opts
, BDRV_OPT_AUTO_READ_ONLY
, "on");
597 assert((bdrv_flags
& BDRV_O_CACHE_MASK
) == 0);
599 if (runstate_check(RUN_STATE_INMIGRATE
)) {
600 bdrv_flags
|= BDRV_O_INACTIVE
;
603 blk
= blk_new_open(file
, NULL
, bs_opts
, bdrv_flags
, errp
);
609 bs
->detect_zeroes
= detect_zeroes
;
611 block_acct_setup(blk_get_stats(blk
), account_invalid
, account_failed
);
613 if (!parse_stats_intervals(blk_get_stats(blk
), interval_list
, errp
)) {
620 /* disk I/O throttling */
621 if (throttle_enabled(&cfg
)) {
622 if (!throttling_group
) {
623 throttling_group
= id
;
625 blk_io_limits_enable(blk
, throttling_group
);
626 blk_set_io_limits(blk
, &cfg
);
629 blk_set_enable_write_cache(blk
, !writethrough
);
630 blk_set_on_error(blk
, on_read_error
, on_write_error
);
632 if (!monitor_add_blk(blk
, id
, errp
)) {
640 qobject_unref(interval_dict
);
641 qobject_unref(interval_list
);
646 qobject_unref(interval_dict
);
647 qobject_unref(interval_list
);
649 qobject_unref(bs_opts
);
653 /* Takes the ownership of bs_opts */
654 static BlockDriverState
*bds_tree_init(QDict
*bs_opts
, Error
**errp
)
658 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
659 * with other callers) rather than what we want as the real defaults.
660 * Apply the defaults here instead. */
661 qdict_set_default_str(bs_opts
, BDRV_OPT_CACHE_DIRECT
, "off");
662 qdict_set_default_str(bs_opts
, BDRV_OPT_CACHE_NO_FLUSH
, "off");
663 qdict_set_default_str(bs_opts
, BDRV_OPT_READ_ONLY
, "off");
665 if (runstate_check(RUN_STATE_INMIGRATE
)) {
666 bdrv_flags
|= BDRV_O_INACTIVE
;
669 return bdrv_open(NULL
, NULL
, bs_opts
, bdrv_flags
, errp
);
672 void blockdev_close_all_bdrv_states(void)
674 BlockDriverState
*bs
, *next_bs
;
676 QTAILQ_FOREACH_SAFE(bs
, &monitor_bdrv_states
, monitor_list
, next_bs
) {
677 AioContext
*ctx
= bdrv_get_aio_context(bs
);
679 aio_context_acquire(ctx
);
681 aio_context_release(ctx
);
685 /* Iterates over the list of monitor-owned BlockDriverStates */
686 BlockDriverState
*bdrv_next_monitor_owned(BlockDriverState
*bs
)
688 return bs
? QTAILQ_NEXT(bs
, monitor_list
)
689 : QTAILQ_FIRST(&monitor_bdrv_states
);
692 static void qemu_opt_rename(QemuOpts
*opts
, const char *from
, const char *to
,
697 value
= qemu_opt_get(opts
, from
);
699 if (qemu_opt_find(opts
, to
)) {
700 error_setg(errp
, "'%s' and its alias '%s' can't be used at the "
701 "same time", to
, from
);
706 /* rename all items in opts */
707 while ((value
= qemu_opt_get(opts
, from
))) {
708 qemu_opt_set(opts
, to
, value
, &error_abort
);
709 qemu_opt_unset(opts
, from
);
713 QemuOptsList qemu_legacy_drive_opts
= {
715 .head
= QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts
.head
),
719 .type
= QEMU_OPT_NUMBER
,
720 .help
= "bus number",
723 .type
= QEMU_OPT_NUMBER
,
724 .help
= "unit number (i.e. lun for scsi)",
727 .type
= QEMU_OPT_NUMBER
,
728 .help
= "index number",
731 .type
= QEMU_OPT_STRING
,
732 .help
= "media type (disk, cdrom)",
735 .type
= QEMU_OPT_STRING
,
736 .help
= "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
739 .type
= QEMU_OPT_STRING
,
743 /* Options that are passed on, but have special semantics with -drive */
745 .name
= BDRV_OPT_READ_ONLY
,
746 .type
= QEMU_OPT_BOOL
,
747 .help
= "open drive file as read-only",
750 .type
= QEMU_OPT_STRING
,
751 .help
= "read error action",
754 .type
= QEMU_OPT_STRING
,
755 .help
= "write error action",
757 .name
= "copy-on-read",
758 .type
= QEMU_OPT_BOOL
,
759 .help
= "copy read data from backing file into image file",
762 { /* end of list */ }
766 DriveInfo
*drive_new(QemuOpts
*all_opts
, BlockInterfaceType block_default_type
,
771 DriveInfo
*dinfo
= NULL
;
773 QemuOpts
*legacy_opts
;
774 DriveMediaType media
= MEDIA_DISK
;
775 BlockInterfaceType type
;
776 int max_devs
, bus_id
, unit_id
, index
;
777 const char *werror
, *rerror
;
778 bool read_only
= false;
780 const char *filename
;
781 Error
*local_err
= NULL
;
784 /* Change legacy command line options into QMP ones */
785 static const struct {
789 { "iops", "throttling.iops-total" },
790 { "iops_rd", "throttling.iops-read" },
791 { "iops_wr", "throttling.iops-write" },
793 { "bps", "throttling.bps-total" },
794 { "bps_rd", "throttling.bps-read" },
795 { "bps_wr", "throttling.bps-write" },
797 { "iops_max", "throttling.iops-total-max" },
798 { "iops_rd_max", "throttling.iops-read-max" },
799 { "iops_wr_max", "throttling.iops-write-max" },
801 { "bps_max", "throttling.bps-total-max" },
802 { "bps_rd_max", "throttling.bps-read-max" },
803 { "bps_wr_max", "throttling.bps-write-max" },
805 { "iops_size", "throttling.iops-size" },
807 { "group", "throttling.group" },
809 { "readonly", BDRV_OPT_READ_ONLY
},
812 for (i
= 0; i
< ARRAY_SIZE(opt_renames
); i
++) {
813 qemu_opt_rename(all_opts
, opt_renames
[i
].from
, opt_renames
[i
].to
,
816 error_propagate(errp
, local_err
);
821 value
= qemu_opt_get(all_opts
, "cache");
826 if (bdrv_parse_cache_mode(value
, &flags
, &writethrough
) != 0) {
827 error_setg(errp
, "invalid cache option");
831 /* Specific options take precedence */
832 if (!qemu_opt_get(all_opts
, BDRV_OPT_CACHE_WB
)) {
833 qemu_opt_set_bool(all_opts
, BDRV_OPT_CACHE_WB
,
834 !writethrough
, &error_abort
);
836 if (!qemu_opt_get(all_opts
, BDRV_OPT_CACHE_DIRECT
)) {
837 qemu_opt_set_bool(all_opts
, BDRV_OPT_CACHE_DIRECT
,
838 !!(flags
& BDRV_O_NOCACHE
), &error_abort
);
840 if (!qemu_opt_get(all_opts
, BDRV_OPT_CACHE_NO_FLUSH
)) {
841 qemu_opt_set_bool(all_opts
, BDRV_OPT_CACHE_NO_FLUSH
,
842 !!(flags
& BDRV_O_NO_FLUSH
), &error_abort
);
844 qemu_opt_unset(all_opts
, "cache");
847 /* Get a QDict for processing the options */
848 bs_opts
= qdict_new();
849 qemu_opts_to_qdict(all_opts
, bs_opts
);
851 legacy_opts
= qemu_opts_create(&qemu_legacy_drive_opts
, NULL
, 0,
853 qemu_opts_absorb_qdict(legacy_opts
, bs_opts
, &local_err
);
855 error_propagate(errp
, local_err
);
860 value
= qemu_opt_get(legacy_opts
, "media");
862 if (!strcmp(value
, "disk")) {
864 } else if (!strcmp(value
, "cdrom")) {
868 error_setg(errp
, "'%s' invalid media", value
);
873 /* copy-on-read is disabled with a warning for read-only devices */
874 read_only
|= qemu_opt_get_bool(legacy_opts
, BDRV_OPT_READ_ONLY
, false);
875 copy_on_read
= qemu_opt_get_bool(legacy_opts
, "copy-on-read", false);
877 if (read_only
&& copy_on_read
) {
878 warn_report("disabling copy-on-read on read-only drive");
879 copy_on_read
= false;
882 qdict_put_str(bs_opts
, BDRV_OPT_READ_ONLY
, read_only
? "on" : "off");
883 qdict_put_str(bs_opts
, "copy-on-read", copy_on_read
? "on" : "off");
885 /* Controller type */
886 value
= qemu_opt_get(legacy_opts
, "if");
889 type
< IF_COUNT
&& strcmp(value
, if_name
[type
]);
892 if (type
== IF_COUNT
) {
893 error_setg(errp
, "unsupported bus type '%s'", value
);
897 type
= block_default_type
;
900 /* Device address specified by bus/unit or index.
901 * If none was specified, try to find the first free one. */
902 bus_id
= qemu_opt_get_number(legacy_opts
, "bus", 0);
903 unit_id
= qemu_opt_get_number(legacy_opts
, "unit", -1);
904 index
= qemu_opt_get_number(legacy_opts
, "index", -1);
906 max_devs
= if_max_devs
[type
];
909 if (bus_id
!= 0 || unit_id
!= -1) {
910 error_setg(errp
, "index cannot be used with bus and unit");
913 bus_id
= drive_index_to_bus_id(type
, index
);
914 unit_id
= drive_index_to_unit_id(type
, index
);
919 while (drive_get(type
, bus_id
, unit_id
) != NULL
) {
921 if (max_devs
&& unit_id
>= max_devs
) {
928 if (max_devs
&& unit_id
>= max_devs
) {
929 error_setg(errp
, "unit %d too big (max is %d)", unit_id
, max_devs
- 1);
933 if (drive_get(type
, bus_id
, unit_id
) != NULL
) {
934 error_setg(errp
, "drive with bus=%d, unit=%d (index=%d) exists",
935 bus_id
, unit_id
, index
);
939 /* no id supplied -> create one */
940 if (qemu_opts_id(all_opts
) == NULL
) {
942 const char *mediastr
= "";
943 if (type
== IF_IDE
|| type
== IF_SCSI
) {
944 mediastr
= (media
== MEDIA_CDROM
) ? "-cd" : "-hd";
947 new_id
= g_strdup_printf("%s%i%s%i", if_name
[type
], bus_id
,
950 new_id
= g_strdup_printf("%s%s%i", if_name
[type
],
953 qdict_put_str(bs_opts
, "id", new_id
);
957 /* Add virtio block device */
958 if (type
== IF_VIRTIO
) {
960 devopts
= qemu_opts_create(qemu_find_opts("device"), NULL
, 0,
962 if (arch_type
== QEMU_ARCH_S390X
) {
963 qemu_opt_set(devopts
, "driver", "virtio-blk-ccw", &error_abort
);
965 qemu_opt_set(devopts
, "driver", "virtio-blk-pci", &error_abort
);
967 qemu_opt_set(devopts
, "drive", qdict_get_str(bs_opts
, "id"),
971 filename
= qemu_opt_get(legacy_opts
, "file");
973 /* Check werror/rerror compatibility with if=... */
974 werror
= qemu_opt_get(legacy_opts
, "werror");
975 if (werror
!= NULL
) {
976 if (type
!= IF_IDE
&& type
!= IF_SCSI
&& type
!= IF_VIRTIO
&&
978 error_setg(errp
, "werror is not supported by this bus type");
981 qdict_put_str(bs_opts
, "werror", werror
);
984 rerror
= qemu_opt_get(legacy_opts
, "rerror");
985 if (rerror
!= NULL
) {
986 if (type
!= IF_IDE
&& type
!= IF_VIRTIO
&& type
!= IF_SCSI
&&
988 error_setg(errp
, "rerror is not supported by this bus type");
991 qdict_put_str(bs_opts
, "rerror", rerror
);
994 /* Actual block device init: Functionality shared with blockdev-add */
995 blk
= blockdev_init(filename
, bs_opts
, &local_err
);
998 error_propagate(errp
, local_err
);
1004 /* Create legacy DriveInfo */
1005 dinfo
= g_malloc0(sizeof(*dinfo
));
1006 dinfo
->opts
= all_opts
;
1009 dinfo
->bus
= bus_id
;
1010 dinfo
->unit
= unit_id
;
1012 blk_set_legacy_dinfo(blk
, dinfo
);
1019 dinfo
->media_cd
= media
== MEDIA_CDROM
;
1026 qemu_opts_del(legacy_opts
);
1027 qobject_unref(bs_opts
);
1031 static BlockDriverState
*qmp_get_root_bs(const char *name
, Error
**errp
)
1033 BlockDriverState
*bs
;
1035 bs
= bdrv_lookup_bs(name
, name
, errp
);
1040 if (!bdrv_is_root_node(bs
)) {
1041 error_setg(errp
, "Need a root block node");
1045 if (!bdrv_is_inserted(bs
)) {
1046 error_setg(errp
, "Device has no medium");
1053 static BlockBackend
*qmp_get_blk(const char *blk_name
, const char *qdev_id
,
1058 if (!blk_name
== !qdev_id
) {
1059 error_setg(errp
, "Need exactly one of 'device' and 'id'");
1064 blk
= blk_by_qdev_id(qdev_id
, errp
);
1066 blk
= blk_by_name(blk_name
);
1068 error_set(errp
, ERROR_CLASS_DEVICE_NOT_FOUND
,
1069 "Device '%s' not found", blk_name
);
1076 void hmp_commit(Monitor
*mon
, const QDict
*qdict
)
1078 const char *device
= qdict_get_str(qdict
, "device");
1082 if (!strcmp(device
, "all")) {
1083 ret
= blk_commit_all();
1085 BlockDriverState
*bs
;
1086 AioContext
*aio_context
;
1088 blk
= blk_by_name(device
);
1090 monitor_printf(mon
, "Device '%s' not found\n", device
);
1093 if (!blk_is_available(blk
)) {
1094 monitor_printf(mon
, "Device '%s' has no medium\n", device
);
1099 aio_context
= bdrv_get_aio_context(bs
);
1100 aio_context_acquire(aio_context
);
1102 ret
= bdrv_commit(bs
);
1104 aio_context_release(aio_context
);
1107 monitor_printf(mon
, "'commit' error for '%s': %s\n", device
,
1112 static void blockdev_do_action(TransactionAction
*action
, Error
**errp
)
1114 TransactionActionList list
;
1116 list
.value
= action
;
1118 qmp_transaction(&list
, false, NULL
, errp
);
1121 void qmp_blockdev_snapshot_sync(bool has_device
, const char *device
,
1122 bool has_node_name
, const char *node_name
,
1123 const char *snapshot_file
,
1124 bool has_snapshot_node_name
,
1125 const char *snapshot_node_name
,
1126 bool has_format
, const char *format
,
1127 bool has_mode
, NewImageMode mode
, Error
**errp
)
1129 BlockdevSnapshotSync snapshot
= {
1130 .has_device
= has_device
,
1131 .device
= (char *) device
,
1132 .has_node_name
= has_node_name
,
1133 .node_name
= (char *) node_name
,
1134 .snapshot_file
= (char *) snapshot_file
,
1135 .has_snapshot_node_name
= has_snapshot_node_name
,
1136 .snapshot_node_name
= (char *) snapshot_node_name
,
1137 .has_format
= has_format
,
1138 .format
= (char *) format
,
1139 .has_mode
= has_mode
,
1142 TransactionAction action
= {
1143 .type
= TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
,
1144 .u
.blockdev_snapshot_sync
.data
= &snapshot
,
1146 blockdev_do_action(&action
, errp
);
1149 void qmp_blockdev_snapshot(const char *node
, const char *overlay
,
1152 BlockdevSnapshot snapshot_data
= {
1153 .node
= (char *) node
,
1154 .overlay
= (char *) overlay
1156 TransactionAction action
= {
1157 .type
= TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT
,
1158 .u
.blockdev_snapshot
.data
= &snapshot_data
,
1160 blockdev_do_action(&action
, errp
);
1163 void qmp_blockdev_snapshot_internal_sync(const char *device
,
1167 BlockdevSnapshotInternal snapshot
= {
1168 .device
= (char *) device
,
1169 .name
= (char *) name
1171 TransactionAction action
= {
1172 .type
= TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
,
1173 .u
.blockdev_snapshot_internal_sync
.data
= &snapshot
,
1175 blockdev_do_action(&action
, errp
);
1178 SnapshotInfo
*qmp_blockdev_snapshot_delete_internal_sync(const char *device
,
1185 BlockDriverState
*bs
;
1186 AioContext
*aio_context
;
1187 QEMUSnapshotInfo sn
;
1188 Error
*local_err
= NULL
;
1189 SnapshotInfo
*info
= NULL
;
1192 bs
= qmp_get_root_bs(device
, errp
);
1196 aio_context
= bdrv_get_aio_context(bs
);
1197 aio_context_acquire(aio_context
);
1208 error_setg(errp
, "Name or id must be provided");
1209 goto out_aio_context
;
1212 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE
, errp
)) {
1213 goto out_aio_context
;
1216 ret
= bdrv_snapshot_find_by_id_and_name(bs
, id
, name
, &sn
, &local_err
);
1218 error_propagate(errp
, local_err
);
1219 goto out_aio_context
;
1223 "Snapshot with id '%s' and name '%s' does not exist on "
1225 STR_OR_NULL(id
), STR_OR_NULL(name
), device
);
1226 goto out_aio_context
;
1229 bdrv_snapshot_delete(bs
, id
, name
, &local_err
);
1231 error_propagate(errp
, local_err
);
1232 goto out_aio_context
;
1235 aio_context_release(aio_context
);
1237 info
= g_new0(SnapshotInfo
, 1);
1238 info
->id
= g_strdup(sn
.id_str
);
1239 info
->name
= g_strdup(sn
.name
);
1240 info
->date_nsec
= sn
.date_nsec
;
1241 info
->date_sec
= sn
.date_sec
;
1242 info
->vm_state_size
= sn
.vm_state_size
;
1243 info
->vm_clock_nsec
= sn
.vm_clock_nsec
% 1000000000;
1244 info
->vm_clock_sec
= sn
.vm_clock_nsec
/ 1000000000;
1249 aio_context_release(aio_context
);
1254 * block_dirty_bitmap_lookup:
1255 * Return a dirty bitmap (if present), after validating
1256 * the node reference and bitmap names.
1258 * @node: The name of the BDS node to search for bitmaps
1259 * @name: The name of the bitmap to search for
1260 * @pbs: Output pointer for BDS lookup, if desired. Can be NULL.
1261 * @errp: Output pointer for error information. Can be NULL.
1263 * @return: A bitmap object on success, or NULL on failure.
1265 static BdrvDirtyBitmap
*block_dirty_bitmap_lookup(const char *node
,
1267 BlockDriverState
**pbs
,
1270 BlockDriverState
*bs
;
1271 BdrvDirtyBitmap
*bitmap
;
1274 error_setg(errp
, "Node cannot be NULL");
1278 error_setg(errp
, "Bitmap name cannot be NULL");
1281 bs
= bdrv_lookup_bs(node
, node
, NULL
);
1283 error_setg(errp
, "Node '%s' not found", node
);
1287 bitmap
= bdrv_find_dirty_bitmap(bs
, name
);
1289 error_setg(errp
, "Dirty bitmap '%s' not found", name
);
1300 /* New and old BlockDriverState structs for atomic group operations */
1302 typedef struct BlkActionState BlkActionState
;
1306 * Table of operations that define an Action.
1308 * @instance_size: Size of state struct, in bytes.
1309 * @prepare: Prepare the work, must NOT be NULL.
1310 * @commit: Commit the changes, can be NULL.
1311 * @abort: Abort the changes on fail, can be NULL.
1312 * @clean: Clean up resources after all transaction actions have called
1313 * commit() or abort(). Can be NULL.
1315 * Only prepare() may fail. In a single transaction, only one of commit() or
1316 * abort() will be called. clean() will always be called if it is present.
1318 typedef struct BlkActionOps
{
1319 size_t instance_size
;
1320 void (*prepare
)(BlkActionState
*common
, Error
**errp
);
1321 void (*commit
)(BlkActionState
*common
);
1322 void (*abort
)(BlkActionState
*common
);
1323 void (*clean
)(BlkActionState
*common
);
1328 * Describes one Action's state within a Transaction.
1330 * @action: QAPI-defined enum identifying which Action to perform.
1331 * @ops: Table of ActionOps this Action can perform.
1332 * @block_job_txn: Transaction which this action belongs to.
1333 * @entry: List membership for all Actions in this Transaction.
1335 * This structure must be arranged as first member in a subclassed type,
1336 * assuming that the compiler will also arrange it to the same offsets as the
1339 struct BlkActionState
{
1340 TransactionAction
*action
;
1341 const BlkActionOps
*ops
;
1342 JobTxn
*block_job_txn
;
1343 TransactionProperties
*txn_props
;
1344 QTAILQ_ENTRY(BlkActionState
) entry
;
1347 /* internal snapshot private data */
1348 typedef struct InternalSnapshotState
{
1349 BlkActionState common
;
1350 BlockDriverState
*bs
;
1351 QEMUSnapshotInfo sn
;
1353 } InternalSnapshotState
;
1356 static int action_check_completion_mode(BlkActionState
*s
, Error
**errp
)
1358 if (s
->txn_props
->completion_mode
!= ACTION_COMPLETION_MODE_INDIVIDUAL
) {
1360 "Action '%s' does not support Transaction property "
1361 "completion-mode = %s",
1362 TransactionActionKind_str(s
->action
->type
),
1363 ActionCompletionMode_str(s
->txn_props
->completion_mode
));
1369 static void internal_snapshot_prepare(BlkActionState
*common
,
1372 Error
*local_err
= NULL
;
1375 BlockDriverState
*bs
;
1376 QEMUSnapshotInfo old_sn
, *sn
;
1379 BlockdevSnapshotInternal
*internal
;
1380 InternalSnapshotState
*state
;
1381 AioContext
*aio_context
;
1384 g_assert(common
->action
->type
==
1385 TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
);
1386 internal
= common
->action
->u
.blockdev_snapshot_internal_sync
.data
;
1387 state
= DO_UPCAST(InternalSnapshotState
, common
, common
);
1389 /* 1. parse input */
1390 device
= internal
->device
;
1391 name
= internal
->name
;
1393 /* 2. check for validation */
1394 if (action_check_completion_mode(common
, errp
) < 0) {
1398 bs
= qmp_get_root_bs(device
, errp
);
1403 aio_context
= bdrv_get_aio_context(bs
);
1404 aio_context_acquire(aio_context
);
1408 /* Paired with .clean() */
1409 bdrv_drained_begin(bs
);
1411 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT
, errp
)) {
1415 if (bdrv_is_read_only(bs
)) {
1416 error_setg(errp
, "Device '%s' is read only", device
);
1420 if (!bdrv_can_snapshot(bs
)) {
1421 error_setg(errp
, "Block format '%s' used by device '%s' "
1422 "does not support internal snapshots",
1423 bs
->drv
->format_name
, device
);
1427 if (!strlen(name
)) {
1428 error_setg(errp
, "Name is empty");
1432 /* check whether a snapshot with name exist */
1433 ret
= bdrv_snapshot_find_by_id_and_name(bs
, NULL
, name
, &old_sn
,
1436 error_propagate(errp
, local_err
);
1440 "Snapshot with name '%s' already exists on device '%s'",
1445 /* 3. take the snapshot */
1447 pstrcpy(sn
->name
, sizeof(sn
->name
), name
);
1448 qemu_gettimeofday(&tv
);
1449 sn
->date_sec
= tv
.tv_sec
;
1450 sn
->date_nsec
= tv
.tv_usec
* 1000;
1451 sn
->vm_clock_nsec
= qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL
);
1453 ret1
= bdrv_snapshot_create(bs
, sn
);
1455 error_setg_errno(errp
, -ret1
,
1456 "Failed to create snapshot '%s' on device '%s'",
1461 /* 4. succeed, mark a snapshot is created */
1462 state
->created
= true;
1465 aio_context_release(aio_context
);
1468 static void internal_snapshot_abort(BlkActionState
*common
)
1470 InternalSnapshotState
*state
=
1471 DO_UPCAST(InternalSnapshotState
, common
, common
);
1472 BlockDriverState
*bs
= state
->bs
;
1473 QEMUSnapshotInfo
*sn
= &state
->sn
;
1474 AioContext
*aio_context
;
1475 Error
*local_error
= NULL
;
1477 if (!state
->created
) {
1481 aio_context
= bdrv_get_aio_context(state
->bs
);
1482 aio_context_acquire(aio_context
);
1484 if (bdrv_snapshot_delete(bs
, sn
->id_str
, sn
->name
, &local_error
) < 0) {
1485 error_reportf_err(local_error
,
1486 "Failed to delete snapshot with id '%s' and "
1487 "name '%s' on device '%s' in abort: ",
1488 sn
->id_str
, sn
->name
,
1489 bdrv_get_device_name(bs
));
1492 aio_context_release(aio_context
);
1495 static void internal_snapshot_clean(BlkActionState
*common
)
1497 InternalSnapshotState
*state
= DO_UPCAST(InternalSnapshotState
,
1499 AioContext
*aio_context
;
1505 aio_context
= bdrv_get_aio_context(state
->bs
);
1506 aio_context_acquire(aio_context
);
1508 bdrv_drained_end(state
->bs
);
1510 aio_context_release(aio_context
);
1513 /* external snapshot private data */
1514 typedef struct ExternalSnapshotState
{
1515 BlkActionState common
;
1516 BlockDriverState
*old_bs
;
1517 BlockDriverState
*new_bs
;
1518 bool overlay_appended
;
1519 } ExternalSnapshotState
;
1521 static void external_snapshot_prepare(BlkActionState
*common
,
1525 QDict
*options
= NULL
;
1526 Error
*local_err
= NULL
;
1527 /* Device and node name of the image to generate the snapshot from */
1529 const char *node_name
;
1530 /* Reference to the new image (for 'blockdev-snapshot') */
1531 const char *snapshot_ref
;
1532 /* File name of the new image (for 'blockdev-snapshot-sync') */
1533 const char *new_image_file
;
1534 ExternalSnapshotState
*state
=
1535 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1536 TransactionAction
*action
= common
->action
;
1537 AioContext
*aio_context
;
1539 /* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar
1540 * purpose but a different set of parameters */
1541 switch (action
->type
) {
1542 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT
:
1544 BlockdevSnapshot
*s
= action
->u
.blockdev_snapshot
.data
;
1546 node_name
= s
->node
;
1547 new_image_file
= NULL
;
1548 snapshot_ref
= s
->overlay
;
1551 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
:
1553 BlockdevSnapshotSync
*s
= action
->u
.blockdev_snapshot_sync
.data
;
1554 device
= s
->has_device
? s
->device
: NULL
;
1555 node_name
= s
->has_node_name
? s
->node_name
: NULL
;
1556 new_image_file
= s
->snapshot_file
;
1557 snapshot_ref
= NULL
;
1561 g_assert_not_reached();
1564 /* start processing */
1565 if (action_check_completion_mode(common
, errp
) < 0) {
1569 state
->old_bs
= bdrv_lookup_bs(device
, node_name
, errp
);
1570 if (!state
->old_bs
) {
1574 aio_context
= bdrv_get_aio_context(state
->old_bs
);
1575 aio_context_acquire(aio_context
);
1577 /* Paired with .clean() */
1578 bdrv_drained_begin(state
->old_bs
);
1580 if (!bdrv_is_inserted(state
->old_bs
)) {
1581 error_setg(errp
, QERR_DEVICE_HAS_NO_MEDIUM
, device
);
1585 if (bdrv_op_is_blocked(state
->old_bs
,
1586 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT
, errp
)) {
1590 if (!bdrv_is_read_only(state
->old_bs
)) {
1591 if (bdrv_flush(state
->old_bs
)) {
1592 error_setg(errp
, QERR_IO_ERROR
);
1597 if (!bdrv_is_first_non_filter(state
->old_bs
)) {
1598 error_setg(errp
, QERR_FEATURE_DISABLED
, "snapshot");
1602 if (action
->type
== TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
) {
1603 BlockdevSnapshotSync
*s
= action
->u
.blockdev_snapshot_sync
.data
;
1604 const char *format
= s
->has_format
? s
->format
: "qcow2";
1605 enum NewImageMode mode
;
1606 const char *snapshot_node_name
=
1607 s
->has_snapshot_node_name
? s
->snapshot_node_name
: NULL
;
1609 if (node_name
&& !snapshot_node_name
) {
1610 error_setg(errp
, "New snapshot node name missing");
1614 if (snapshot_node_name
&&
1615 bdrv_lookup_bs(snapshot_node_name
, snapshot_node_name
, NULL
)) {
1616 error_setg(errp
, "New snapshot node name already in use");
1620 flags
= state
->old_bs
->open_flags
;
1621 flags
&= ~(BDRV_O_SNAPSHOT
| BDRV_O_COPY_ON_READ
);
1622 flags
|= BDRV_O_NO_BACKING
;
1624 /* create new image w/backing file */
1625 mode
= s
->has_mode
? s
->mode
: NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
1626 if (mode
!= NEW_IMAGE_MODE_EXISTING
) {
1627 int64_t size
= bdrv_getlength(state
->old_bs
);
1629 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
1632 bdrv_refresh_filename(state
->old_bs
);
1633 bdrv_img_create(new_image_file
, format
,
1634 state
->old_bs
->filename
,
1635 state
->old_bs
->drv
->format_name
,
1636 NULL
, size
, flags
, false, &local_err
);
1638 error_propagate(errp
, local_err
);
1643 options
= qdict_new();
1644 if (snapshot_node_name
) {
1645 qdict_put_str(options
, "node-name", snapshot_node_name
);
1647 qdict_put_str(options
, "driver", format
);
1650 state
->new_bs
= bdrv_open(new_image_file
, snapshot_ref
, options
, flags
,
1652 /* We will manually add the backing_hd field to the bs later */
1653 if (!state
->new_bs
) {
1657 if (bdrv_has_blk(state
->new_bs
)) {
1658 error_setg(errp
, "The snapshot is already in use");
1662 if (bdrv_op_is_blocked(state
->new_bs
, BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT
,
1667 if (state
->new_bs
->backing
!= NULL
) {
1668 error_setg(errp
, "The snapshot already has a backing image");
1672 if (!state
->new_bs
->drv
->supports_backing
) {
1673 error_setg(errp
, "The snapshot does not support backing images");
1677 bdrv_set_aio_context(state
->new_bs
, aio_context
);
1679 /* This removes our old bs and adds the new bs. This is an operation that
1680 * can fail, so we need to do it in .prepare; undoing it for abort is
1681 * always possible. */
1682 bdrv_ref(state
->new_bs
);
1683 bdrv_append(state
->new_bs
, state
->old_bs
, &local_err
);
1685 error_propagate(errp
, local_err
);
1688 state
->overlay_appended
= true;
1691 aio_context_release(aio_context
);
1694 static void external_snapshot_commit(BlkActionState
*common
)
1696 ExternalSnapshotState
*state
=
1697 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1698 AioContext
*aio_context
;
1700 aio_context
= bdrv_get_aio_context(state
->old_bs
);
1701 aio_context_acquire(aio_context
);
1703 /* We don't need (or want) to use the transactional
1704 * bdrv_reopen_multiple() across all the entries at once, because we
1705 * don't want to abort all of them if one of them fails the reopen */
1706 if (!atomic_read(&state
->old_bs
->copy_on_read
)) {
1707 bdrv_reopen_set_read_only(state
->old_bs
, true, NULL
);
1710 aio_context_release(aio_context
);
1713 static void external_snapshot_abort(BlkActionState
*common
)
1715 ExternalSnapshotState
*state
=
1716 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1717 if (state
->new_bs
) {
1718 if (state
->overlay_appended
) {
1719 AioContext
*aio_context
;
1721 aio_context
= bdrv_get_aio_context(state
->old_bs
);
1722 aio_context_acquire(aio_context
);
1724 bdrv_ref(state
->old_bs
); /* we can't let bdrv_set_backind_hd()
1725 close state->old_bs; we need it */
1726 bdrv_set_backing_hd(state
->new_bs
, NULL
, &error_abort
);
1727 bdrv_replace_node(state
->new_bs
, state
->old_bs
, &error_abort
);
1728 bdrv_unref(state
->old_bs
); /* bdrv_replace_node() ref'ed old_bs */
1730 aio_context_release(aio_context
);
1735 static void external_snapshot_clean(BlkActionState
*common
)
1737 ExternalSnapshotState
*state
=
1738 DO_UPCAST(ExternalSnapshotState
, common
, common
);
1739 AioContext
*aio_context
;
1741 if (!state
->old_bs
) {
1745 aio_context
= bdrv_get_aio_context(state
->old_bs
);
1746 aio_context_acquire(aio_context
);
1748 bdrv_drained_end(state
->old_bs
);
1749 bdrv_unref(state
->new_bs
);
1751 aio_context_release(aio_context
);
1754 typedef struct DriveBackupState
{
1755 BlkActionState common
;
1756 BlockDriverState
*bs
;
1760 static BlockJob
*do_drive_backup(DriveBackup
*backup
, JobTxn
*txn
,
1763 static void drive_backup_prepare(BlkActionState
*common
, Error
**errp
)
1765 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1766 BlockDriverState
*bs
;
1767 DriveBackup
*backup
;
1768 AioContext
*aio_context
;
1769 Error
*local_err
= NULL
;
1771 assert(common
->action
->type
== TRANSACTION_ACTION_KIND_DRIVE_BACKUP
);
1772 backup
= common
->action
->u
.drive_backup
.data
;
1774 bs
= qmp_get_root_bs(backup
->device
, errp
);
1779 aio_context
= bdrv_get_aio_context(bs
);
1780 aio_context_acquire(aio_context
);
1782 /* Paired with .clean() */
1783 bdrv_drained_begin(bs
);
1787 state
->job
= do_drive_backup(backup
, common
->block_job_txn
, &local_err
);
1789 error_propagate(errp
, local_err
);
1794 aio_context_release(aio_context
);
1797 static void drive_backup_commit(BlkActionState
*common
)
1799 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1800 AioContext
*aio_context
;
1802 aio_context
= bdrv_get_aio_context(state
->bs
);
1803 aio_context_acquire(aio_context
);
1806 job_start(&state
->job
->job
);
1808 aio_context_release(aio_context
);
1811 static void drive_backup_abort(BlkActionState
*common
)
1813 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1816 AioContext
*aio_context
;
1818 aio_context
= bdrv_get_aio_context(state
->bs
);
1819 aio_context_acquire(aio_context
);
1821 job_cancel_sync(&state
->job
->job
);
1823 aio_context_release(aio_context
);
1827 static void drive_backup_clean(BlkActionState
*common
)
1829 DriveBackupState
*state
= DO_UPCAST(DriveBackupState
, common
, common
);
1830 AioContext
*aio_context
;
1836 aio_context
= bdrv_get_aio_context(state
->bs
);
1837 aio_context_acquire(aio_context
);
1839 bdrv_drained_end(state
->bs
);
1841 aio_context_release(aio_context
);
1844 typedef struct BlockdevBackupState
{
1845 BlkActionState common
;
1846 BlockDriverState
*bs
;
1848 } BlockdevBackupState
;
1850 static BlockJob
*do_blockdev_backup(BlockdevBackup
*backup
, JobTxn
*txn
,
1853 static void blockdev_backup_prepare(BlkActionState
*common
, Error
**errp
)
1855 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
1856 BlockdevBackup
*backup
;
1857 BlockDriverState
*bs
, *target
;
1858 AioContext
*aio_context
;
1859 Error
*local_err
= NULL
;
1861 assert(common
->action
->type
== TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP
);
1862 backup
= common
->action
->u
.blockdev_backup
.data
;
1864 bs
= bdrv_lookup_bs(backup
->device
, backup
->device
, errp
);
1869 target
= bdrv_lookup_bs(backup
->target
, backup
->target
, errp
);
1874 aio_context
= bdrv_get_aio_context(bs
);
1875 if (aio_context
!= bdrv_get_aio_context(target
)) {
1876 error_setg(errp
, "Backup between two IO threads is not implemented");
1879 aio_context_acquire(aio_context
);
1882 /* Paired with .clean() */
1883 bdrv_drained_begin(state
->bs
);
1885 state
->job
= do_blockdev_backup(backup
, common
->block_job_txn
, &local_err
);
1887 error_propagate(errp
, local_err
);
1892 aio_context_release(aio_context
);
1895 static void blockdev_backup_commit(BlkActionState
*common
)
1897 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
1898 AioContext
*aio_context
;
1900 aio_context
= bdrv_get_aio_context(state
->bs
);
1901 aio_context_acquire(aio_context
);
1904 job_start(&state
->job
->job
);
1906 aio_context_release(aio_context
);
1909 static void blockdev_backup_abort(BlkActionState
*common
)
1911 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
1914 AioContext
*aio_context
;
1916 aio_context
= bdrv_get_aio_context(state
->bs
);
1917 aio_context_acquire(aio_context
);
1919 job_cancel_sync(&state
->job
->job
);
1921 aio_context_release(aio_context
);
1925 static void blockdev_backup_clean(BlkActionState
*common
)
1927 BlockdevBackupState
*state
= DO_UPCAST(BlockdevBackupState
, common
, common
);
1928 AioContext
*aio_context
;
1934 aio_context
= bdrv_get_aio_context(state
->bs
);
1935 aio_context_acquire(aio_context
);
1937 bdrv_drained_end(state
->bs
);
1939 aio_context_release(aio_context
);
1942 typedef struct BlockDirtyBitmapState
{
1943 BlkActionState common
;
1944 BdrvDirtyBitmap
*bitmap
;
1945 BlockDriverState
*bs
;
1949 } BlockDirtyBitmapState
;
1951 static void block_dirty_bitmap_add_prepare(BlkActionState
*common
,
1954 Error
*local_err
= NULL
;
1955 BlockDirtyBitmapAdd
*action
;
1956 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
1959 if (action_check_completion_mode(common
, errp
) < 0) {
1963 action
= common
->action
->u
.block_dirty_bitmap_add
.data
;
1964 /* AIO context taken and released within qmp_block_dirty_bitmap_add */
1965 qmp_block_dirty_bitmap_add(action
->node
, action
->name
,
1966 action
->has_granularity
, action
->granularity
,
1967 action
->has_persistent
, action
->persistent
,
1968 action
->has_autoload
, action
->autoload
,
1969 action
->has_disabled
, action
->disabled
,
1973 state
->prepared
= true;
1975 error_propagate(errp
, local_err
);
1979 static void block_dirty_bitmap_add_abort(BlkActionState
*common
)
1981 BlockDirtyBitmapAdd
*action
;
1982 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
1985 action
= common
->action
->u
.block_dirty_bitmap_add
.data
;
1986 /* Should not be able to fail: IF the bitmap was added via .prepare(),
1987 * then the node reference and bitmap name must have been valid.
1989 if (state
->prepared
) {
1990 qmp_block_dirty_bitmap_remove(action
->node
, action
->name
, &error_abort
);
1994 static void block_dirty_bitmap_clear_prepare(BlkActionState
*common
,
1997 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
1999 BlockDirtyBitmap
*action
;
2001 if (action_check_completion_mode(common
, errp
) < 0) {
2005 action
= common
->action
->u
.block_dirty_bitmap_clear
.data
;
2006 state
->bitmap
= block_dirty_bitmap_lookup(action
->node
,
2010 if (!state
->bitmap
) {
2014 if (bdrv_dirty_bitmap_check(state
->bitmap
, BDRV_BITMAP_DEFAULT
, errp
)) {
2018 bdrv_clear_dirty_bitmap(state
->bitmap
, &state
->backup
);
2021 static void block_dirty_bitmap_restore(BlkActionState
*common
)
2023 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2026 if (state
->backup
) {
2027 bdrv_restore_dirty_bitmap(state
->bitmap
, state
->backup
);
2031 static void block_dirty_bitmap_free_backup(BlkActionState
*common
)
2033 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2036 hbitmap_free(state
->backup
);
2039 static void block_dirty_bitmap_enable_prepare(BlkActionState
*common
,
2042 BlockDirtyBitmap
*action
;
2043 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2046 if (action_check_completion_mode(common
, errp
) < 0) {
2050 action
= common
->action
->u
.block_dirty_bitmap_enable
.data
;
2051 state
->bitmap
= block_dirty_bitmap_lookup(action
->node
,
2055 if (!state
->bitmap
) {
2059 if (bdrv_dirty_bitmap_check(state
->bitmap
, BDRV_BITMAP_ALLOW_RO
, errp
)) {
2063 state
->was_enabled
= bdrv_dirty_bitmap_enabled(state
->bitmap
);
2064 bdrv_enable_dirty_bitmap(state
->bitmap
);
2067 static void block_dirty_bitmap_enable_abort(BlkActionState
*common
)
2069 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2072 if (!state
->was_enabled
) {
2073 bdrv_disable_dirty_bitmap(state
->bitmap
);
2077 static void block_dirty_bitmap_disable_prepare(BlkActionState
*common
,
2080 BlockDirtyBitmap
*action
;
2081 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2084 if (action_check_completion_mode(common
, errp
) < 0) {
2088 action
= common
->action
->u
.block_dirty_bitmap_disable
.data
;
2089 state
->bitmap
= block_dirty_bitmap_lookup(action
->node
,
2093 if (!state
->bitmap
) {
2097 if (bdrv_dirty_bitmap_check(state
->bitmap
, BDRV_BITMAP_ALLOW_RO
, errp
)) {
2101 state
->was_enabled
= bdrv_dirty_bitmap_enabled(state
->bitmap
);
2102 bdrv_disable_dirty_bitmap(state
->bitmap
);
2105 static void block_dirty_bitmap_disable_abort(BlkActionState
*common
)
2107 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2110 if (state
->was_enabled
) {
2111 bdrv_enable_dirty_bitmap(state
->bitmap
);
2115 static BdrvDirtyBitmap
*do_block_dirty_bitmap_merge(
2116 const char *node
, const char *target
,
2117 BlockDirtyBitmapMergeSourceList
*bitmaps
,
2118 HBitmap
**backup
, Error
**errp
);
2120 static void block_dirty_bitmap_merge_prepare(BlkActionState
*common
,
2123 BlockDirtyBitmapMerge
*action
;
2124 BlockDirtyBitmapState
*state
= DO_UPCAST(BlockDirtyBitmapState
,
2127 if (action_check_completion_mode(common
, errp
) < 0) {
2131 action
= common
->action
->u
.block_dirty_bitmap_merge
.data
;
2133 state
->bitmap
= do_block_dirty_bitmap_merge(action
->node
, action
->target
,
2134 action
->bitmaps
, &state
->backup
,
2138 static void abort_prepare(BlkActionState
*common
, Error
**errp
)
2140 error_setg(errp
, "Transaction aborted using Abort action");
2143 static void abort_commit(BlkActionState
*common
)
2145 g_assert_not_reached(); /* this action never succeeds */
2148 static const BlkActionOps actions
[] = {
2149 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT
] = {
2150 .instance_size
= sizeof(ExternalSnapshotState
),
2151 .prepare
= external_snapshot_prepare
,
2152 .commit
= external_snapshot_commit
,
2153 .abort
= external_snapshot_abort
,
2154 .clean
= external_snapshot_clean
,
2156 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC
] = {
2157 .instance_size
= sizeof(ExternalSnapshotState
),
2158 .prepare
= external_snapshot_prepare
,
2159 .commit
= external_snapshot_commit
,
2160 .abort
= external_snapshot_abort
,
2161 .clean
= external_snapshot_clean
,
2163 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP
] = {
2164 .instance_size
= sizeof(DriveBackupState
),
2165 .prepare
= drive_backup_prepare
,
2166 .commit
= drive_backup_commit
,
2167 .abort
= drive_backup_abort
,
2168 .clean
= drive_backup_clean
,
2170 [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP
] = {
2171 .instance_size
= sizeof(BlockdevBackupState
),
2172 .prepare
= blockdev_backup_prepare
,
2173 .commit
= blockdev_backup_commit
,
2174 .abort
= blockdev_backup_abort
,
2175 .clean
= blockdev_backup_clean
,
2177 [TRANSACTION_ACTION_KIND_ABORT
] = {
2178 .instance_size
= sizeof(BlkActionState
),
2179 .prepare
= abort_prepare
,
2180 .commit
= abort_commit
,
2182 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC
] = {
2183 .instance_size
= sizeof(InternalSnapshotState
),
2184 .prepare
= internal_snapshot_prepare
,
2185 .abort
= internal_snapshot_abort
,
2186 .clean
= internal_snapshot_clean
,
2188 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD
] = {
2189 .instance_size
= sizeof(BlockDirtyBitmapState
),
2190 .prepare
= block_dirty_bitmap_add_prepare
,
2191 .abort
= block_dirty_bitmap_add_abort
,
2193 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR
] = {
2194 .instance_size
= sizeof(BlockDirtyBitmapState
),
2195 .prepare
= block_dirty_bitmap_clear_prepare
,
2196 .commit
= block_dirty_bitmap_free_backup
,
2197 .abort
= block_dirty_bitmap_restore
,
2199 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ENABLE
] = {
2200 .instance_size
= sizeof(BlockDirtyBitmapState
),
2201 .prepare
= block_dirty_bitmap_enable_prepare
,
2202 .abort
= block_dirty_bitmap_enable_abort
,
2204 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_DISABLE
] = {
2205 .instance_size
= sizeof(BlockDirtyBitmapState
),
2206 .prepare
= block_dirty_bitmap_disable_prepare
,
2207 .abort
= block_dirty_bitmap_disable_abort
,
2209 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_MERGE
] = {
2210 .instance_size
= sizeof(BlockDirtyBitmapState
),
2211 .prepare
= block_dirty_bitmap_merge_prepare
,
2212 .commit
= block_dirty_bitmap_free_backup
,
2213 .abort
= block_dirty_bitmap_restore
,
2215 /* Where are transactions for MIRROR, COMMIT and STREAM?
2216 * Although these blockjobs use transaction callbacks like the backup job,
2217 * these jobs do not necessarily adhere to transaction semantics.
2218 * These jobs may not fully undo all of their actions on abort, nor do they
2219 * necessarily work in transactions with more than one job in them.
2224 * Allocate a TransactionProperties structure if necessary, and fill
2225 * that structure with desired defaults if they are unset.
2227 static TransactionProperties
*get_transaction_properties(
2228 TransactionProperties
*props
)
2231 props
= g_new0(TransactionProperties
, 1);
2234 if (!props
->has_completion_mode
) {
2235 props
->has_completion_mode
= true;
2236 props
->completion_mode
= ACTION_COMPLETION_MODE_INDIVIDUAL
;
2243 * 'Atomic' group operations. The operations are performed as a set, and if
2244 * any fail then we roll back all operations in the group.
2246 void qmp_transaction(TransactionActionList
*dev_list
,
2248 struct TransactionProperties
*props
,
2251 TransactionActionList
*dev_entry
= dev_list
;
2252 JobTxn
*block_job_txn
= NULL
;
2253 BlkActionState
*state
, *next
;
2254 Error
*local_err
= NULL
;
2256 QTAILQ_HEAD(, BlkActionState
) snap_bdrv_states
;
2257 QTAILQ_INIT(&snap_bdrv_states
);
2259 /* Does this transaction get canceled as a group on failure?
2260 * If not, we don't really need to make a JobTxn.
2262 props
= get_transaction_properties(props
);
2263 if (props
->completion_mode
!= ACTION_COMPLETION_MODE_INDIVIDUAL
) {
2264 block_job_txn
= job_txn_new();
2267 /* drain all i/o before any operations */
2270 /* We don't do anything in this loop that commits us to the operations */
2271 while (NULL
!= dev_entry
) {
2272 TransactionAction
*dev_info
= NULL
;
2273 const BlkActionOps
*ops
;
2275 dev_info
= dev_entry
->value
;
2276 dev_entry
= dev_entry
->next
;
2278 assert(dev_info
->type
< ARRAY_SIZE(actions
));
2280 ops
= &actions
[dev_info
->type
];
2281 assert(ops
->instance_size
> 0);
2283 state
= g_malloc0(ops
->instance_size
);
2285 state
->action
= dev_info
;
2286 state
->block_job_txn
= block_job_txn
;
2287 state
->txn_props
= props
;
2288 QTAILQ_INSERT_TAIL(&snap_bdrv_states
, state
, entry
);
2290 state
->ops
->prepare(state
, &local_err
);
2292 error_propagate(errp
, local_err
);
2293 goto delete_and_fail
;
2297 QTAILQ_FOREACH(state
, &snap_bdrv_states
, entry
) {
2298 if (state
->ops
->commit
) {
2299 state
->ops
->commit(state
);
2307 /* failure, and it is all-or-none; roll back all operations */
2308 QTAILQ_FOREACH_REVERSE(state
, &snap_bdrv_states
, entry
) {
2309 if (state
->ops
->abort
) {
2310 state
->ops
->abort(state
);
2314 QTAILQ_FOREACH_SAFE(state
, &snap_bdrv_states
, entry
, next
) {
2315 if (state
->ops
->clean
) {
2316 state
->ops
->clean(state
);
2321 qapi_free_TransactionProperties(props
);
2323 job_txn_unref(block_job_txn
);
2326 void qmp_eject(bool has_device
, const char *device
,
2327 bool has_id
, const char *id
,
2328 bool has_force
, bool force
, Error
**errp
)
2330 Error
*local_err
= NULL
;
2337 rc
= do_open_tray(has_device
? device
: NULL
,
2340 if (rc
&& rc
!= -ENOSYS
) {
2341 error_propagate(errp
, local_err
);
2344 error_free(local_err
);
2346 blockdev_remove_medium(has_device
, device
, has_id
, id
, errp
);
2349 void qmp_block_passwd(bool has_device
, const char *device
,
2350 bool has_node_name
, const char *node_name
,
2351 const char *password
, Error
**errp
)
2354 "Setting block passwords directly is no longer supported");
2358 * Attempt to open the tray of @device.
2359 * If @force, ignore its tray lock.
2360 * Else, if the tray is locked, don't open it, but ask the guest to open it.
2361 * On error, store an error through @errp and return -errno.
2362 * If @device does not exist, return -ENODEV.
2363 * If it has no removable media, return -ENOTSUP.
2364 * If it has no tray, return -ENOSYS.
2365 * If the guest was asked to open the tray, return -EINPROGRESS.
2368 static int do_open_tray(const char *blk_name
, const char *qdev_id
,
2369 bool force
, Error
**errp
)
2372 const char *device
= qdev_id
?: blk_name
;
2375 blk
= qmp_get_blk(blk_name
, qdev_id
, errp
);
2380 if (!blk_dev_has_removable_media(blk
)) {
2381 error_setg(errp
, "Device '%s' is not removable", device
);
2385 if (!blk_dev_has_tray(blk
)) {
2386 error_setg(errp
, "Device '%s' does not have a tray", device
);
2390 if (blk_dev_is_tray_open(blk
)) {
2394 locked
= blk_dev_is_medium_locked(blk
);
2396 blk_dev_eject_request(blk
, force
);
2399 if (!locked
|| force
) {
2400 blk_dev_change_media_cb(blk
, false, &error_abort
);
2403 if (locked
&& !force
) {
2404 error_setg(errp
, "Device '%s' is locked and force was not specified, "
2405 "wait for tray to open and try again", device
);
2406 return -EINPROGRESS
;
2412 void qmp_blockdev_open_tray(bool has_device
, const char *device
,
2413 bool has_id
, const char *id
,
2414 bool has_force
, bool force
,
2417 Error
*local_err
= NULL
;
2423 rc
= do_open_tray(has_device
? device
: NULL
,
2426 if (rc
&& rc
!= -ENOSYS
&& rc
!= -EINPROGRESS
) {
2427 error_propagate(errp
, local_err
);
2430 error_free(local_err
);
2433 void qmp_blockdev_close_tray(bool has_device
, const char *device
,
2434 bool has_id
, const char *id
,
2438 Error
*local_err
= NULL
;
2440 device
= has_device
? device
: NULL
;
2441 id
= has_id
? id
: NULL
;
2443 blk
= qmp_get_blk(device
, id
, errp
);
2448 if (!blk_dev_has_removable_media(blk
)) {
2449 error_setg(errp
, "Device '%s' is not removable", device
?: id
);
2453 if (!blk_dev_has_tray(blk
)) {
2454 /* Ignore this command on tray-less devices */
2458 if (!blk_dev_is_tray_open(blk
)) {
2462 blk_dev_change_media_cb(blk
, true, &local_err
);
2464 error_propagate(errp
, local_err
);
2469 static void blockdev_remove_medium(bool has_device
, const char *device
,
2470 bool has_id
, const char *id
, Error
**errp
)
2473 BlockDriverState
*bs
;
2474 AioContext
*aio_context
;
2475 bool has_attached_device
;
2477 device
= has_device
? device
: NULL
;
2478 id
= has_id
? id
: NULL
;
2480 blk
= qmp_get_blk(device
, id
, errp
);
2485 /* For BBs without a device, we can exchange the BDS tree at will */
2486 has_attached_device
= blk_get_attached_dev(blk
);
2488 if (has_attached_device
&& !blk_dev_has_removable_media(blk
)) {
2489 error_setg(errp
, "Device '%s' is not removable", device
?: id
);
2493 if (has_attached_device
&& blk_dev_has_tray(blk
) &&
2494 !blk_dev_is_tray_open(blk
))
2496 error_setg(errp
, "Tray of device '%s' is not open", device
?: id
);
2505 aio_context
= bdrv_get_aio_context(bs
);
2506 aio_context_acquire(aio_context
);
2508 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_EJECT
, errp
)) {
2514 if (!blk_dev_has_tray(blk
)) {
2515 /* For tray-less devices, blockdev-open-tray is a no-op (or may not be
2516 * called at all); therefore, the medium needs to be ejected here.
2517 * Do it after blk_remove_bs() so blk_is_inserted(blk) returns the @load
2518 * value passed here (i.e. false). */
2519 blk_dev_change_media_cb(blk
, false, &error_abort
);
2523 aio_context_release(aio_context
);
2526 void qmp_blockdev_remove_medium(const char *id
, Error
**errp
)
2528 blockdev_remove_medium(false, NULL
, true, id
, errp
);
2531 static void qmp_blockdev_insert_anon_medium(BlockBackend
*blk
,
2532 BlockDriverState
*bs
, Error
**errp
)
2534 Error
*local_err
= NULL
;
2538 /* For BBs without a device, we can exchange the BDS tree at will */
2539 has_device
= blk_get_attached_dev(blk
);
2541 if (has_device
&& !blk_dev_has_removable_media(blk
)) {
2542 error_setg(errp
, "Device is not removable");
2546 if (has_device
&& blk_dev_has_tray(blk
) && !blk_dev_is_tray_open(blk
)) {
2547 error_setg(errp
, "Tray of the device is not open");
2552 error_setg(errp
, "There already is a medium in the device");
2556 ret
= blk_insert_bs(blk
, bs
, errp
);
2561 if (!blk_dev_has_tray(blk
)) {
2562 /* For tray-less devices, blockdev-close-tray is a no-op (or may not be
2563 * called at all); therefore, the medium needs to be pushed into the
2565 * Do it after blk_insert_bs() so blk_is_inserted(blk) returns the @load
2566 * value passed here (i.e. true). */
2567 blk_dev_change_media_cb(blk
, true, &local_err
);
2569 error_propagate(errp
, local_err
);
2576 static void blockdev_insert_medium(bool has_device
, const char *device
,
2577 bool has_id
, const char *id
,
2578 const char *node_name
, Error
**errp
)
2581 BlockDriverState
*bs
;
2583 blk
= qmp_get_blk(has_device
? device
: NULL
,
2590 bs
= bdrv_find_node(node_name
);
2592 error_setg(errp
, "Node '%s' not found", node_name
);
2596 if (bdrv_has_blk(bs
)) {
2597 error_setg(errp
, "Node '%s' is already in use", node_name
);
2601 qmp_blockdev_insert_anon_medium(blk
, bs
, errp
);
2604 void qmp_blockdev_insert_medium(const char *id
, const char *node_name
,
2607 blockdev_insert_medium(false, NULL
, true, id
, node_name
, errp
);
2610 void qmp_blockdev_change_medium(bool has_device
, const char *device
,
2611 bool has_id
, const char *id
,
2612 const char *filename
,
2613 bool has_format
, const char *format
,
2615 BlockdevChangeReadOnlyMode read_only
,
2619 BlockDriverState
*medium_bs
= NULL
;
2623 QDict
*options
= NULL
;
2626 blk
= qmp_get_blk(has_device
? device
: NULL
,
2634 blk_update_root_state(blk
);
2637 bdrv_flags
= blk_get_open_flags_from_root_state(blk
);
2638 bdrv_flags
&= ~(BDRV_O_TEMPORARY
| BDRV_O_SNAPSHOT
| BDRV_O_NO_BACKING
|
2639 BDRV_O_PROTOCOL
| BDRV_O_AUTO_RDONLY
);
2641 if (!has_read_only
) {
2642 read_only
= BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN
;
2645 switch (read_only
) {
2646 case BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN
:
2649 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_ONLY
:
2650 bdrv_flags
&= ~BDRV_O_RDWR
;
2653 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_WRITE
:
2654 bdrv_flags
|= BDRV_O_RDWR
;
2661 options
= qdict_new();
2662 detect_zeroes
= blk_get_detect_zeroes_from_root_state(blk
);
2663 qdict_put_str(options
, "detect-zeroes", detect_zeroes
? "on" : "off");
2666 qdict_put_str(options
, "driver", format
);
2669 medium_bs
= bdrv_open(filename
, NULL
, options
, bdrv_flags
, errp
);
2674 rc
= do_open_tray(has_device
? device
: NULL
,
2677 if (rc
&& rc
!= -ENOSYS
) {
2678 error_propagate(errp
, err
);
2684 blockdev_remove_medium(has_device
, device
, has_id
, id
, &err
);
2686 error_propagate(errp
, err
);
2690 qmp_blockdev_insert_anon_medium(blk
, medium_bs
, &err
);
2692 error_propagate(errp
, err
);
2696 qmp_blockdev_close_tray(has_device
, device
, has_id
, id
, errp
);
2699 /* If the medium has been inserted, the device has its own reference, so
2700 * ours must be relinquished; and if it has not been inserted successfully,
2701 * the reference must be relinquished anyway */
2702 bdrv_unref(medium_bs
);
2705 /* throttling disk I/O limits */
2706 void qmp_block_set_io_throttle(BlockIOThrottle
*arg
, Error
**errp
)
2709 BlockDriverState
*bs
;
2711 AioContext
*aio_context
;
2713 blk
= qmp_get_blk(arg
->has_device
? arg
->device
: NULL
,
2714 arg
->has_id
? arg
->id
: NULL
,
2720 aio_context
= blk_get_aio_context(blk
);
2721 aio_context_acquire(aio_context
);
2725 error_setg(errp
, "Device has no medium");
2729 throttle_config_init(&cfg
);
2730 cfg
.buckets
[THROTTLE_BPS_TOTAL
].avg
= arg
->bps
;
2731 cfg
.buckets
[THROTTLE_BPS_READ
].avg
= arg
->bps_rd
;
2732 cfg
.buckets
[THROTTLE_BPS_WRITE
].avg
= arg
->bps_wr
;
2734 cfg
.buckets
[THROTTLE_OPS_TOTAL
].avg
= arg
->iops
;
2735 cfg
.buckets
[THROTTLE_OPS_READ
].avg
= arg
->iops_rd
;
2736 cfg
.buckets
[THROTTLE_OPS_WRITE
].avg
= arg
->iops_wr
;
2738 if (arg
->has_bps_max
) {
2739 cfg
.buckets
[THROTTLE_BPS_TOTAL
].max
= arg
->bps_max
;
2741 if (arg
->has_bps_rd_max
) {
2742 cfg
.buckets
[THROTTLE_BPS_READ
].max
= arg
->bps_rd_max
;
2744 if (arg
->has_bps_wr_max
) {
2745 cfg
.buckets
[THROTTLE_BPS_WRITE
].max
= arg
->bps_wr_max
;
2747 if (arg
->has_iops_max
) {
2748 cfg
.buckets
[THROTTLE_OPS_TOTAL
].max
= arg
->iops_max
;
2750 if (arg
->has_iops_rd_max
) {
2751 cfg
.buckets
[THROTTLE_OPS_READ
].max
= arg
->iops_rd_max
;
2753 if (arg
->has_iops_wr_max
) {
2754 cfg
.buckets
[THROTTLE_OPS_WRITE
].max
= arg
->iops_wr_max
;
2757 if (arg
->has_bps_max_length
) {
2758 cfg
.buckets
[THROTTLE_BPS_TOTAL
].burst_length
= arg
->bps_max_length
;
2760 if (arg
->has_bps_rd_max_length
) {
2761 cfg
.buckets
[THROTTLE_BPS_READ
].burst_length
= arg
->bps_rd_max_length
;
2763 if (arg
->has_bps_wr_max_length
) {
2764 cfg
.buckets
[THROTTLE_BPS_WRITE
].burst_length
= arg
->bps_wr_max_length
;
2766 if (arg
->has_iops_max_length
) {
2767 cfg
.buckets
[THROTTLE_OPS_TOTAL
].burst_length
= arg
->iops_max_length
;
2769 if (arg
->has_iops_rd_max_length
) {
2770 cfg
.buckets
[THROTTLE_OPS_READ
].burst_length
= arg
->iops_rd_max_length
;
2772 if (arg
->has_iops_wr_max_length
) {
2773 cfg
.buckets
[THROTTLE_OPS_WRITE
].burst_length
= arg
->iops_wr_max_length
;
2776 if (arg
->has_iops_size
) {
2777 cfg
.op_size
= arg
->iops_size
;
2780 if (!throttle_is_valid(&cfg
, errp
)) {
2784 if (throttle_enabled(&cfg
)) {
2785 /* Enable I/O limits if they're not enabled yet, otherwise
2786 * just update the throttling group. */
2787 if (!blk_get_public(blk
)->throttle_group_member
.throttle_state
) {
2788 blk_io_limits_enable(blk
,
2789 arg
->has_group
? arg
->group
:
2790 arg
->has_device
? arg
->device
:
2792 } else if (arg
->has_group
) {
2793 blk_io_limits_update_group(blk
, arg
->group
);
2795 /* Set the new throttling configuration */
2796 blk_set_io_limits(blk
, &cfg
);
2797 } else if (blk_get_public(blk
)->throttle_group_member
.throttle_state
) {
2798 /* If all throttling settings are set to 0, disable I/O limits */
2799 blk_io_limits_disable(blk
);
2803 aio_context_release(aio_context
);
2806 void qmp_block_dirty_bitmap_add(const char *node
, const char *name
,
2807 bool has_granularity
, uint32_t granularity
,
2808 bool has_persistent
, bool persistent
,
2809 bool has_autoload
, bool autoload
,
2810 bool has_disabled
, bool disabled
,
2813 BlockDriverState
*bs
;
2814 BdrvDirtyBitmap
*bitmap
;
2815 AioContext
*aio_context
= NULL
;
2817 if (!name
|| name
[0] == '\0') {
2818 error_setg(errp
, "Bitmap name cannot be empty");
2822 bs
= bdrv_lookup_bs(node
, node
, errp
);
2827 if (has_granularity
) {
2828 if (granularity
< 512 || !is_power_of_2(granularity
)) {
2829 error_setg(errp
, "Granularity must be power of 2 "
2830 "and at least 512");
2834 /* Default to cluster size, if available: */
2835 granularity
= bdrv_get_default_bitmap_granularity(bs
);
2838 if (!has_persistent
) {
2843 warn_report("Autoload option is deprecated and its value is ignored");
2846 if (!has_disabled
) {
2851 aio_context
= bdrv_get_aio_context(bs
);
2852 aio_context_acquire(aio_context
);
2853 if (!bdrv_can_store_new_dirty_bitmap(bs
, name
, granularity
, errp
)) {
2858 bitmap
= bdrv_create_dirty_bitmap(bs
, granularity
, name
, errp
);
2859 if (bitmap
== NULL
) {
2864 bdrv_disable_dirty_bitmap(bitmap
);
2867 bdrv_dirty_bitmap_set_persistence(bitmap
, persistent
);
2870 aio_context_release(aio_context
);
2874 void qmp_block_dirty_bitmap_remove(const char *node
, const char *name
,
2877 BlockDriverState
*bs
;
2878 BdrvDirtyBitmap
*bitmap
;
2879 Error
*local_err
= NULL
;
2880 AioContext
*aio_context
= NULL
;
2882 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
2883 if (!bitmap
|| !bs
) {
2887 if (bdrv_dirty_bitmap_check(bitmap
, BDRV_BITMAP_BUSY
| BDRV_BITMAP_RO
,
2892 if (bdrv_dirty_bitmap_get_persistence(bitmap
)) {
2893 aio_context
= bdrv_get_aio_context(bs
);
2894 aio_context_acquire(aio_context
);
2895 bdrv_remove_persistent_dirty_bitmap(bs
, name
, &local_err
);
2896 if (local_err
!= NULL
) {
2897 error_propagate(errp
, local_err
);
2902 bdrv_release_dirty_bitmap(bs
, bitmap
);
2905 aio_context_release(aio_context
);
2910 * Completely clear a bitmap, for the purposes of synchronizing a bitmap
2911 * immediately after a full backup operation.
2913 void qmp_block_dirty_bitmap_clear(const char *node
, const char *name
,
2916 BdrvDirtyBitmap
*bitmap
;
2917 BlockDriverState
*bs
;
2919 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
2920 if (!bitmap
|| !bs
) {
2924 if (bdrv_dirty_bitmap_check(bitmap
, BDRV_BITMAP_DEFAULT
, errp
)) {
2928 bdrv_clear_dirty_bitmap(bitmap
, NULL
);
2931 void qmp_block_dirty_bitmap_enable(const char *node
, const char *name
,
2934 BlockDriverState
*bs
;
2935 BdrvDirtyBitmap
*bitmap
;
2937 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
2942 if (bdrv_dirty_bitmap_check(bitmap
, BDRV_BITMAP_ALLOW_RO
, errp
)) {
2946 bdrv_enable_dirty_bitmap(bitmap
);
2949 void qmp_block_dirty_bitmap_disable(const char *node
, const char *name
,
2952 BlockDriverState
*bs
;
2953 BdrvDirtyBitmap
*bitmap
;
2955 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
2960 if (bdrv_dirty_bitmap_check(bitmap
, BDRV_BITMAP_ALLOW_RO
, errp
)) {
2964 bdrv_disable_dirty_bitmap(bitmap
);
2967 static BdrvDirtyBitmap
*do_block_dirty_bitmap_merge(
2968 const char *node
, const char *target
,
2969 BlockDirtyBitmapMergeSourceList
*bitmaps
,
2970 HBitmap
**backup
, Error
**errp
)
2972 BlockDriverState
*bs
;
2973 BdrvDirtyBitmap
*dst
, *src
, *anon
;
2974 BlockDirtyBitmapMergeSourceList
*lst
;
2975 Error
*local_err
= NULL
;
2977 dst
= block_dirty_bitmap_lookup(node
, target
, &bs
, errp
);
2982 anon
= bdrv_create_dirty_bitmap(bs
, bdrv_dirty_bitmap_granularity(dst
),
2988 for (lst
= bitmaps
; lst
; lst
= lst
->next
) {
2989 switch (lst
->value
->type
) {
2990 const char *name
, *node
;
2992 name
= lst
->value
->u
.local
;
2993 src
= bdrv_find_dirty_bitmap(bs
, name
);
2995 error_setg(errp
, "Dirty bitmap '%s' not found", name
);
3001 node
= lst
->value
->u
.external
.node
;
3002 name
= lst
->value
->u
.external
.name
;
3003 src
= block_dirty_bitmap_lookup(node
, name
, NULL
, errp
);
3013 bdrv_merge_dirty_bitmap(anon
, src
, NULL
, &local_err
);
3015 error_propagate(errp
, local_err
);
3021 /* Merge into dst; dst is unchanged on failure. */
3022 bdrv_merge_dirty_bitmap(dst
, anon
, backup
, errp
);
3025 bdrv_release_dirty_bitmap(bs
, anon
);
3029 void qmp_block_dirty_bitmap_merge(const char *node
, const char *target
,
3030 BlockDirtyBitmapMergeSourceList
*bitmaps
,
3033 do_block_dirty_bitmap_merge(node
, target
, bitmaps
, NULL
, errp
);
3036 BlockDirtyBitmapSha256
*qmp_x_debug_block_dirty_bitmap_sha256(const char *node
,
3040 BdrvDirtyBitmap
*bitmap
;
3041 BlockDriverState
*bs
;
3042 BlockDirtyBitmapSha256
*ret
= NULL
;
3045 bitmap
= block_dirty_bitmap_lookup(node
, name
, &bs
, errp
);
3046 if (!bitmap
|| !bs
) {
3050 sha256
= bdrv_dirty_bitmap_sha256(bitmap
, errp
);
3051 if (sha256
== NULL
) {
3055 ret
= g_new(BlockDirtyBitmapSha256
, 1);
3056 ret
->sha256
= sha256
;
3061 void hmp_drive_del(Monitor
*mon
, const QDict
*qdict
)
3063 const char *id
= qdict_get_str(qdict
, "id");
3065 BlockDriverState
*bs
;
3066 AioContext
*aio_context
;
3067 Error
*local_err
= NULL
;
3069 bs
= bdrv_find_node(id
);
3071 qmp_blockdev_del(id
, &local_err
);
3073 error_report_err(local_err
);
3078 blk
= blk_by_name(id
);
3080 error_report("Device '%s' not found", id
);
3084 if (!blk_legacy_dinfo(blk
)) {
3085 error_report("Deleting device added with blockdev-add"
3086 " is not supported");
3090 aio_context
= blk_get_aio_context(blk
);
3091 aio_context_acquire(aio_context
);
3095 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_DRIVE_DEL
, &local_err
)) {
3096 error_report_err(local_err
);
3097 aio_context_release(aio_context
);
3104 /* Make the BlockBackend and the attached BlockDriverState anonymous */
3105 monitor_remove_blk(blk
);
3107 /* If this BlockBackend has a device attached to it, its refcount will be
3108 * decremented when the device is removed; otherwise we have to do so here.
3110 if (blk_get_attached_dev(blk
)) {
3111 /* Further I/O must not pause the guest */
3112 blk_set_on_error(blk
, BLOCKDEV_ON_ERROR_REPORT
,
3113 BLOCKDEV_ON_ERROR_REPORT
);
3118 aio_context_release(aio_context
);
3121 void qmp_block_resize(bool has_device
, const char *device
,
3122 bool has_node_name
, const char *node_name
,
3123 int64_t size
, Error
**errp
)
3125 Error
*local_err
= NULL
;
3126 BlockBackend
*blk
= NULL
;
3127 BlockDriverState
*bs
;
3128 AioContext
*aio_context
;
3131 bs
= bdrv_lookup_bs(has_device
? device
: NULL
,
3132 has_node_name
? node_name
: NULL
,
3135 error_propagate(errp
, local_err
);
3139 aio_context
= bdrv_get_aio_context(bs
);
3140 aio_context_acquire(aio_context
);
3142 if (!bdrv_is_first_non_filter(bs
)) {
3143 error_setg(errp
, QERR_FEATURE_DISABLED
, "resize");
3148 error_setg(errp
, QERR_INVALID_PARAMETER_VALUE
, "size", "a >0 size");
3152 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_RESIZE
, NULL
)) {
3153 error_setg(errp
, QERR_DEVICE_IN_USE
, device
);
3157 blk
= blk_new(bdrv_get_aio_context(bs
), BLK_PERM_RESIZE
, BLK_PERM_ALL
);
3158 ret
= blk_insert_bs(blk
, bs
, errp
);
3163 bdrv_drained_begin(bs
);
3164 ret
= blk_truncate(blk
, size
, PREALLOC_MODE_OFF
, errp
);
3165 bdrv_drained_end(bs
);
3169 aio_context_release(aio_context
);
3172 void qmp_block_stream(bool has_job_id
, const char *job_id
, const char *device
,
3173 bool has_base
, const char *base
,
3174 bool has_base_node
, const char *base_node
,
3175 bool has_backing_file
, const char *backing_file
,
3176 bool has_speed
, int64_t speed
,
3177 bool has_on_error
, BlockdevOnError on_error
,
3178 bool has_auto_finalize
, bool auto_finalize
,
3179 bool has_auto_dismiss
, bool auto_dismiss
,
3182 BlockDriverState
*bs
, *iter
;
3183 BlockDriverState
*base_bs
= NULL
;
3184 AioContext
*aio_context
;
3185 Error
*local_err
= NULL
;
3186 const char *base_name
= NULL
;
3187 int job_flags
= JOB_DEFAULT
;
3189 if (!has_on_error
) {
3190 on_error
= BLOCKDEV_ON_ERROR_REPORT
;
3193 bs
= bdrv_lookup_bs(device
, device
, errp
);
3198 aio_context
= bdrv_get_aio_context(bs
);
3199 aio_context_acquire(aio_context
);
3201 if (has_base
&& has_base_node
) {
3202 error_setg(errp
, "'base' and 'base-node' cannot be specified "
3203 "at the same time");
3208 base_bs
= bdrv_find_backing_image(bs
, base
);
3209 if (base_bs
== NULL
) {
3210 error_setg(errp
, QERR_BASE_NOT_FOUND
, base
);
3213 assert(bdrv_get_aio_context(base_bs
) == aio_context
);
3217 if (has_base_node
) {
3218 base_bs
= bdrv_lookup_bs(NULL
, base_node
, errp
);
3222 if (bs
== base_bs
|| !bdrv_chain_contains(bs
, base_bs
)) {
3223 error_setg(errp
, "Node '%s' is not a backing image of '%s'",
3227 assert(bdrv_get_aio_context(base_bs
) == aio_context
);
3228 bdrv_refresh_filename(base_bs
);
3229 base_name
= base_bs
->filename
;
3232 /* Check for op blockers in the whole chain between bs and base */
3233 for (iter
= bs
; iter
&& iter
!= base_bs
; iter
= backing_bs(iter
)) {
3234 if (bdrv_op_is_blocked(iter
, BLOCK_OP_TYPE_STREAM
, errp
)) {
3239 /* if we are streaming the entire chain, the result will have no backing
3240 * file, and specifying one is therefore an error */
3241 if (base_bs
== NULL
&& has_backing_file
) {
3242 error_setg(errp
, "backing file specified, but streaming the "
3247 /* backing_file string overrides base bs filename */
3248 base_name
= has_backing_file
? backing_file
: base_name
;
3250 if (has_auto_finalize
&& !auto_finalize
) {
3251 job_flags
|= JOB_MANUAL_FINALIZE
;
3253 if (has_auto_dismiss
&& !auto_dismiss
) {
3254 job_flags
|= JOB_MANUAL_DISMISS
;
3257 stream_start(has_job_id
? job_id
: NULL
, bs
, base_bs
, base_name
,
3258 job_flags
, has_speed
? speed
: 0, on_error
, &local_err
);
3260 error_propagate(errp
, local_err
);
3264 trace_qmp_block_stream(bs
, bs
->job
);
3267 aio_context_release(aio_context
);
3270 void qmp_block_commit(bool has_job_id
, const char *job_id
, const char *device
,
3271 bool has_base_node
, const char *base_node
,
3272 bool has_base
, const char *base
,
3273 bool has_top_node
, const char *top_node
,
3274 bool has_top
, const char *top
,
3275 bool has_backing_file
, const char *backing_file
,
3276 bool has_speed
, int64_t speed
,
3277 bool has_filter_node_name
, const char *filter_node_name
,
3278 bool has_auto_finalize
, bool auto_finalize
,
3279 bool has_auto_dismiss
, bool auto_dismiss
,
3282 BlockDriverState
*bs
;
3283 BlockDriverState
*iter
;
3284 BlockDriverState
*base_bs
, *top_bs
;
3285 AioContext
*aio_context
;
3286 Error
*local_err
= NULL
;
3287 /* This will be part of the QMP command, if/when the
3288 * BlockdevOnError change for blkmirror makes it in
3290 BlockdevOnError on_error
= BLOCKDEV_ON_ERROR_REPORT
;
3291 int job_flags
= JOB_DEFAULT
;
3296 if (!has_filter_node_name
) {
3297 filter_node_name
= NULL
;
3299 if (has_auto_finalize
&& !auto_finalize
) {
3300 job_flags
|= JOB_MANUAL_FINALIZE
;
3302 if (has_auto_dismiss
&& !auto_dismiss
) {
3303 job_flags
|= JOB_MANUAL_DISMISS
;
3307 * libvirt relies on the DeviceNotFound error class in order to probe for
3308 * live commit feature versions; for this to work, we must make sure to
3309 * perform the device lookup before any generic errors that may occur in a
3310 * scenario in which all optional arguments are omitted. */
3311 bs
= qmp_get_root_bs(device
, &local_err
);
3313 bs
= bdrv_lookup_bs(device
, device
, NULL
);
3315 error_free(local_err
);
3316 error_set(errp
, ERROR_CLASS_DEVICE_NOT_FOUND
,
3317 "Device '%s' not found", device
);
3319 error_propagate(errp
, local_err
);
3324 aio_context
= bdrv_get_aio_context(bs
);
3325 aio_context_acquire(aio_context
);
3327 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_COMMIT_SOURCE
, errp
)) {
3331 /* default top_bs is the active layer */
3334 if (has_top_node
&& has_top
) {
3335 error_setg(errp
, "'top-node' and 'top' are mutually exclusive");
3337 } else if (has_top_node
) {
3338 top_bs
= bdrv_lookup_bs(NULL
, top_node
, errp
);
3339 if (top_bs
== NULL
) {
3342 if (!bdrv_chain_contains(bs
, top_bs
)) {
3343 error_setg(errp
, "'%s' is not in this backing file chain",
3347 } else if (has_top
&& top
) {
3348 /* This strcmp() is just a shortcut, there is no need to
3349 * refresh @bs's filename. If it mismatches,
3350 * bdrv_find_backing_image() will do the refresh and may still
3352 if (strcmp(bs
->filename
, top
) != 0) {
3353 top_bs
= bdrv_find_backing_image(bs
, top
);
3357 if (top_bs
== NULL
) {
3358 error_setg(errp
, "Top image file %s not found", top
? top
: "NULL");
3362 assert(bdrv_get_aio_context(top_bs
) == aio_context
);
3364 if (has_base_node
&& has_base
) {
3365 error_setg(errp
, "'base-node' and 'base' are mutually exclusive");
3367 } else if (has_base_node
) {
3368 base_bs
= bdrv_lookup_bs(NULL
, base_node
, errp
);
3369 if (base_bs
== NULL
) {
3372 if (!bdrv_chain_contains(top_bs
, base_bs
)) {
3373 error_setg(errp
, "'%s' is not in this backing file chain",
3377 } else if (has_base
&& base
) {
3378 base_bs
= bdrv_find_backing_image(top_bs
, base
);
3380 base_bs
= bdrv_find_base(top_bs
);
3383 if (base_bs
== NULL
) {
3384 error_setg(errp
, QERR_BASE_NOT_FOUND
, base
? base
: "NULL");
3388 assert(bdrv_get_aio_context(base_bs
) == aio_context
);
3390 for (iter
= top_bs
; iter
!= backing_bs(base_bs
); iter
= backing_bs(iter
)) {
3391 if (bdrv_op_is_blocked(iter
, BLOCK_OP_TYPE_COMMIT_TARGET
, errp
)) {
3396 /* Do not allow attempts to commit an image into itself */
3397 if (top_bs
== base_bs
) {
3398 error_setg(errp
, "cannot commit an image into itself");
3403 if (has_backing_file
) {
3404 error_setg(errp
, "'backing-file' specified,"
3405 " but 'top' is the active layer");
3408 commit_active_start(has_job_id
? job_id
: NULL
, bs
, base_bs
,
3409 job_flags
, speed
, on_error
,
3410 filter_node_name
, NULL
, NULL
, false, &local_err
);
3412 BlockDriverState
*overlay_bs
= bdrv_find_overlay(bs
, top_bs
);
3413 if (bdrv_op_is_blocked(overlay_bs
, BLOCK_OP_TYPE_COMMIT_TARGET
, errp
)) {
3416 commit_start(has_job_id
? job_id
: NULL
, bs
, base_bs
, top_bs
, job_flags
,
3417 speed
, on_error
, has_backing_file
? backing_file
: NULL
,
3418 filter_node_name
, &local_err
);
3420 if (local_err
!= NULL
) {
3421 error_propagate(errp
, local_err
);
3426 aio_context_release(aio_context
);
3429 static BlockJob
*do_drive_backup(DriveBackup
*backup
, JobTxn
*txn
,
3432 BlockDriverState
*bs
;
3433 BlockDriverState
*target_bs
;
3434 BlockDriverState
*source
= NULL
;
3435 BlockJob
*job
= NULL
;
3436 BdrvDirtyBitmap
*bmap
= NULL
;
3437 AioContext
*aio_context
;
3438 QDict
*options
= NULL
;
3439 Error
*local_err
= NULL
;
3440 int flags
, job_flags
= JOB_DEFAULT
;
3442 bool set_backing_hd
= false;
3444 if (!backup
->has_speed
) {
3447 if (!backup
->has_on_source_error
) {
3448 backup
->on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
3450 if (!backup
->has_on_target_error
) {
3451 backup
->on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
3453 if (!backup
->has_mode
) {
3454 backup
->mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
3456 if (!backup
->has_job_id
) {
3457 backup
->job_id
= NULL
;
3459 if (!backup
->has_auto_finalize
) {
3460 backup
->auto_finalize
= true;
3462 if (!backup
->has_auto_dismiss
) {
3463 backup
->auto_dismiss
= true;
3465 if (!backup
->has_compress
) {
3466 backup
->compress
= false;
3469 bs
= bdrv_lookup_bs(backup
->device
, backup
->device
, errp
);
3475 error_setg(errp
, "Device has no medium");
3479 aio_context
= bdrv_get_aio_context(bs
);
3480 aio_context_acquire(aio_context
);
3482 if (!backup
->has_format
) {
3483 backup
->format
= backup
->mode
== NEW_IMAGE_MODE_EXISTING
?
3484 NULL
: (char*) bs
->drv
->format_name
;
3487 /* Early check to avoid creating target */
3488 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_BACKUP_SOURCE
, errp
)) {
3492 flags
= bs
->open_flags
| BDRV_O_RDWR
;
3494 /* See if we have a backing HD we can use to create our new image
3496 if (backup
->sync
== MIRROR_SYNC_MODE_TOP
) {
3497 source
= backing_bs(bs
);
3499 backup
->sync
= MIRROR_SYNC_MODE_FULL
;
3502 if (backup
->sync
== MIRROR_SYNC_MODE_NONE
) {
3504 flags
|= BDRV_O_NO_BACKING
;
3505 set_backing_hd
= true;
3508 size
= bdrv_getlength(bs
);
3510 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
3514 if (backup
->mode
!= NEW_IMAGE_MODE_EXISTING
) {
3515 assert(backup
->format
);
3517 bdrv_refresh_filename(source
);
3518 bdrv_img_create(backup
->target
, backup
->format
, source
->filename
,
3519 source
->drv
->format_name
, NULL
,
3520 size
, flags
, false, &local_err
);
3522 bdrv_img_create(backup
->target
, backup
->format
, NULL
, NULL
, NULL
,
3523 size
, flags
, false, &local_err
);
3528 error_propagate(errp
, local_err
);
3532 if (backup
->format
) {
3534 options
= qdict_new();
3536 qdict_put_str(options
, "driver", backup
->format
);
3539 target_bs
= bdrv_open(backup
->target
, NULL
, options
, flags
, errp
);
3544 bdrv_set_aio_context(target_bs
, aio_context
);
3546 if (set_backing_hd
) {
3547 bdrv_set_backing_hd(target_bs
, source
, &local_err
);
3553 if (backup
->has_bitmap
) {
3554 bmap
= bdrv_find_dirty_bitmap(bs
, backup
->bitmap
);
3556 error_setg(errp
, "Bitmap '%s' could not be found", backup
->bitmap
);
3559 if (bdrv_dirty_bitmap_check(bmap
, BDRV_BITMAP_DEFAULT
, errp
)) {
3563 if (!backup
->auto_finalize
) {
3564 job_flags
|= JOB_MANUAL_FINALIZE
;
3566 if (!backup
->auto_dismiss
) {
3567 job_flags
|= JOB_MANUAL_DISMISS
;
3570 job
= backup_job_create(backup
->job_id
, bs
, target_bs
, backup
->speed
,
3571 backup
->sync
, bmap
, backup
->compress
,
3572 backup
->on_source_error
, backup
->on_target_error
,
3573 job_flags
, NULL
, NULL
, txn
, &local_err
);
3574 if (local_err
!= NULL
) {
3575 error_propagate(errp
, local_err
);
3580 bdrv_unref(target_bs
);
3582 aio_context_release(aio_context
);
3586 void qmp_drive_backup(DriveBackup
*arg
, Error
**errp
)
3590 job
= do_drive_backup(arg
, NULL
, errp
);
3592 job_start(&job
->job
);
3596 BlockDeviceInfoList
*qmp_query_named_block_nodes(Error
**errp
)
3598 return bdrv_named_nodes_list(errp
);
3601 XDbgBlockGraph
*qmp_x_debug_query_block_graph(Error
**errp
)
3603 return bdrv_get_xdbg_block_graph(errp
);
3606 BlockJob
*do_blockdev_backup(BlockdevBackup
*backup
, JobTxn
*txn
,
3609 BlockDriverState
*bs
;
3610 BlockDriverState
*target_bs
;
3611 Error
*local_err
= NULL
;
3612 BdrvDirtyBitmap
*bmap
= NULL
;
3613 AioContext
*aio_context
;
3614 BlockJob
*job
= NULL
;
3615 int job_flags
= JOB_DEFAULT
;
3617 if (!backup
->has_speed
) {
3620 if (!backup
->has_on_source_error
) {
3621 backup
->on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
3623 if (!backup
->has_on_target_error
) {
3624 backup
->on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
3626 if (!backup
->has_job_id
) {
3627 backup
->job_id
= NULL
;
3629 if (!backup
->has_auto_finalize
) {
3630 backup
->auto_finalize
= true;
3632 if (!backup
->has_auto_dismiss
) {
3633 backup
->auto_dismiss
= true;
3635 if (!backup
->has_compress
) {
3636 backup
->compress
= false;
3639 bs
= bdrv_lookup_bs(backup
->device
, backup
->device
, errp
);
3644 aio_context
= bdrv_get_aio_context(bs
);
3645 aio_context_acquire(aio_context
);
3647 target_bs
= bdrv_lookup_bs(backup
->target
, backup
->target
, errp
);
3652 if (bdrv_get_aio_context(target_bs
) != aio_context
) {
3653 if (!bdrv_has_blk(target_bs
)) {
3654 /* The target BDS is not attached, we can safely move it to another
3656 bdrv_set_aio_context(target_bs
, aio_context
);
3658 error_setg(errp
, "Target is attached to a different thread from "
3664 if (backup
->has_bitmap
) {
3665 bmap
= bdrv_find_dirty_bitmap(bs
, backup
->bitmap
);
3667 error_setg(errp
, "Bitmap '%s' could not be found", backup
->bitmap
);
3670 if (bdrv_dirty_bitmap_check(bmap
, BDRV_BITMAP_DEFAULT
, errp
)) {
3675 if (!backup
->auto_finalize
) {
3676 job_flags
|= JOB_MANUAL_FINALIZE
;
3678 if (!backup
->auto_dismiss
) {
3679 job_flags
|= JOB_MANUAL_DISMISS
;
3681 job
= backup_job_create(backup
->job_id
, bs
, target_bs
, backup
->speed
,
3682 backup
->sync
, bmap
, backup
->compress
,
3683 backup
->on_source_error
, backup
->on_target_error
,
3684 job_flags
, NULL
, NULL
, txn
, &local_err
);
3685 if (local_err
!= NULL
) {
3686 error_propagate(errp
, local_err
);
3689 aio_context_release(aio_context
);
3693 void qmp_blockdev_backup(BlockdevBackup
*arg
, Error
**errp
)
3696 job
= do_blockdev_backup(arg
, NULL
, errp
);
3698 job_start(&job
->job
);
3702 /* Parameter check and block job starting for drive mirroring.
3703 * Caller should hold @device and @target's aio context (must be the same).
3705 static void blockdev_mirror_common(const char *job_id
, BlockDriverState
*bs
,
3706 BlockDriverState
*target
,
3707 bool has_replaces
, const char *replaces
,
3708 enum MirrorSyncMode sync
,
3709 BlockMirrorBackingMode backing_mode
,
3710 bool has_speed
, int64_t speed
,
3711 bool has_granularity
, uint32_t granularity
,
3712 bool has_buf_size
, int64_t buf_size
,
3713 bool has_on_source_error
,
3714 BlockdevOnError on_source_error
,
3715 bool has_on_target_error
,
3716 BlockdevOnError on_target_error
,
3717 bool has_unmap
, bool unmap
,
3718 bool has_filter_node_name
,
3719 const char *filter_node_name
,
3720 bool has_copy_mode
, MirrorCopyMode copy_mode
,
3721 bool has_auto_finalize
, bool auto_finalize
,
3722 bool has_auto_dismiss
, bool auto_dismiss
,
3725 int job_flags
= JOB_DEFAULT
;
3730 if (!has_on_source_error
) {
3731 on_source_error
= BLOCKDEV_ON_ERROR_REPORT
;
3733 if (!has_on_target_error
) {
3734 on_target_error
= BLOCKDEV_ON_ERROR_REPORT
;
3736 if (!has_granularity
) {
3739 if (!has_buf_size
) {
3745 if (!has_filter_node_name
) {
3746 filter_node_name
= NULL
;
3748 if (!has_copy_mode
) {
3749 copy_mode
= MIRROR_COPY_MODE_BACKGROUND
;
3751 if (has_auto_finalize
&& !auto_finalize
) {
3752 job_flags
|= JOB_MANUAL_FINALIZE
;
3754 if (has_auto_dismiss
&& !auto_dismiss
) {
3755 job_flags
|= JOB_MANUAL_DISMISS
;
3758 if (granularity
!= 0 && (granularity
< 512 || granularity
> 1048576 * 64)) {
3759 error_setg(errp
, QERR_INVALID_PARAMETER_VALUE
, "granularity",
3760 "a value in range [512B, 64MB]");
3763 if (granularity
& (granularity
- 1)) {
3764 error_setg(errp
, QERR_INVALID_PARAMETER_VALUE
, "granularity",
3769 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_MIRROR_SOURCE
, errp
)) {
3772 if (bdrv_op_is_blocked(target
, BLOCK_OP_TYPE_MIRROR_TARGET
, errp
)) {
3776 if (!bs
->backing
&& sync
== MIRROR_SYNC_MODE_TOP
) {
3777 sync
= MIRROR_SYNC_MODE_FULL
;
3781 BlockDriverState
*to_replace_bs
;
3782 AioContext
*replace_aio_context
;
3783 int64_t bs_size
, replace_size
;
3785 bs_size
= bdrv_getlength(bs
);
3787 error_setg_errno(errp
, -bs_size
, "Failed to query device's size");
3791 to_replace_bs
= check_to_replace_node(bs
, replaces
, errp
);
3792 if (!to_replace_bs
) {
3796 replace_aio_context
= bdrv_get_aio_context(to_replace_bs
);
3797 aio_context_acquire(replace_aio_context
);
3798 replace_size
= bdrv_getlength(to_replace_bs
);
3799 aio_context_release(replace_aio_context
);
3801 if (replace_size
< 0) {
3802 error_setg_errno(errp
, -replace_size
,
3803 "Failed to query the replacement node's size");
3806 if (bs_size
!= replace_size
) {
3807 error_setg(errp
, "cannot replace image with a mirror image of "
3813 /* pass the node name to replace to mirror start since it's loose coupling
3814 * and will allow to check whether the node still exist at mirror completion
3816 mirror_start(job_id
, bs
, target
,
3817 has_replaces
? replaces
: NULL
, job_flags
,
3818 speed
, granularity
, buf_size
, sync
, backing_mode
,
3819 on_source_error
, on_target_error
, unmap
, filter_node_name
,
3823 void qmp_drive_mirror(DriveMirror
*arg
, Error
**errp
)
3825 BlockDriverState
*bs
;
3826 BlockDriverState
*source
, *target_bs
;
3827 AioContext
*aio_context
;
3828 BlockMirrorBackingMode backing_mode
;
3829 Error
*local_err
= NULL
;
3830 QDict
*options
= NULL
;
3833 const char *format
= arg
->format
;
3835 bs
= qmp_get_root_bs(arg
->device
, errp
);
3840 /* Early check to avoid creating target */
3841 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_MIRROR_SOURCE
, errp
)) {
3845 aio_context
= bdrv_get_aio_context(bs
);
3846 aio_context_acquire(aio_context
);
3848 if (!arg
->has_mode
) {
3849 arg
->mode
= NEW_IMAGE_MODE_ABSOLUTE_PATHS
;
3852 if (!arg
->has_format
) {
3853 format
= (arg
->mode
== NEW_IMAGE_MODE_EXISTING
3854 ? NULL
: bs
->drv
->format_name
);
3857 flags
= bs
->open_flags
| BDRV_O_RDWR
;
3858 source
= backing_bs(bs
);
3859 if (!source
&& arg
->sync
== MIRROR_SYNC_MODE_TOP
) {
3860 arg
->sync
= MIRROR_SYNC_MODE_FULL
;
3862 if (arg
->sync
== MIRROR_SYNC_MODE_NONE
) {
3866 size
= bdrv_getlength(bs
);
3868 error_setg_errno(errp
, -size
, "bdrv_getlength failed");
3872 if (arg
->has_replaces
) {
3873 if (!arg
->has_node_name
) {
3874 error_setg(errp
, "a node-name must be provided when replacing a"
3875 " named node of the graph");
3880 if (arg
->mode
== NEW_IMAGE_MODE_ABSOLUTE_PATHS
) {
3881 backing_mode
= MIRROR_SOURCE_BACKING_CHAIN
;
3883 backing_mode
= MIRROR_OPEN_BACKING_CHAIN
;
3886 /* Don't open backing image in create() */
3887 flags
|= BDRV_O_NO_BACKING
;
3889 if ((arg
->sync
== MIRROR_SYNC_MODE_FULL
|| !source
)
3890 && arg
->mode
!= NEW_IMAGE_MODE_EXISTING
)
3892 /* create new image w/o backing file */
3894 bdrv_img_create(arg
->target
, format
,
3895 NULL
, NULL
, NULL
, size
, flags
, false, &local_err
);
3897 switch (arg
->mode
) {
3898 case NEW_IMAGE_MODE_EXISTING
:
3900 case NEW_IMAGE_MODE_ABSOLUTE_PATHS
:
3901 /* create new image with backing file */
3902 bdrv_refresh_filename(source
);
3903 bdrv_img_create(arg
->target
, format
,
3905 source
->drv
->format_name
,
3906 NULL
, size
, flags
, false, &local_err
);
3914 error_propagate(errp
, local_err
);
3918 options
= qdict_new();
3919 if (arg
->has_node_name
) {
3920 qdict_put_str(options
, "node-name", arg
->node_name
);
3923 qdict_put_str(options
, "driver", format
);
3926 /* Mirroring takes care of copy-on-write using the source's backing
3929 target_bs
= bdrv_open(arg
->target
, NULL
, options
, flags
, errp
);
3934 bdrv_set_aio_context(target_bs
, aio_context
);
3936 blockdev_mirror_common(arg
->has_job_id
? arg
->job_id
: NULL
, bs
, target_bs
,
3937 arg
->has_replaces
, arg
->replaces
, arg
->sync
,
3938 backing_mode
, arg
->has_speed
, arg
->speed
,
3939 arg
->has_granularity
, arg
->granularity
,
3940 arg
->has_buf_size
, arg
->buf_size
,
3941 arg
->has_on_source_error
, arg
->on_source_error
,
3942 arg
->has_on_target_error
, arg
->on_target_error
,
3943 arg
->has_unmap
, arg
->unmap
,
3945 arg
->has_copy_mode
, arg
->copy_mode
,
3946 arg
->has_auto_finalize
, arg
->auto_finalize
,
3947 arg
->has_auto_dismiss
, arg
->auto_dismiss
,
3949 bdrv_unref(target_bs
);
3950 error_propagate(errp
, local_err
);
3952 aio_context_release(aio_context
);
3955 void qmp_blockdev_mirror(bool has_job_id
, const char *job_id
,
3956 const char *device
, const char *target
,
3957 bool has_replaces
, const char *replaces
,
3958 MirrorSyncMode sync
,
3959 bool has_speed
, int64_t speed
,
3960 bool has_granularity
, uint32_t granularity
,
3961 bool has_buf_size
, int64_t buf_size
,
3962 bool has_on_source_error
,
3963 BlockdevOnError on_source_error
,
3964 bool has_on_target_error
,
3965 BlockdevOnError on_target_error
,
3966 bool has_filter_node_name
,
3967 const char *filter_node_name
,
3968 bool has_copy_mode
, MirrorCopyMode copy_mode
,
3969 bool has_auto_finalize
, bool auto_finalize
,
3970 bool has_auto_dismiss
, bool auto_dismiss
,
3973 BlockDriverState
*bs
;
3974 BlockDriverState
*target_bs
;
3975 AioContext
*aio_context
;
3976 BlockMirrorBackingMode backing_mode
= MIRROR_LEAVE_BACKING_CHAIN
;
3977 Error
*local_err
= NULL
;
3979 bs
= qmp_get_root_bs(device
, errp
);
3984 target_bs
= bdrv_lookup_bs(target
, target
, errp
);
3989 aio_context
= bdrv_get_aio_context(bs
);
3990 aio_context_acquire(aio_context
);
3992 bdrv_set_aio_context(target_bs
, aio_context
);
3994 blockdev_mirror_common(has_job_id
? job_id
: NULL
, bs
, target_bs
,
3995 has_replaces
, replaces
, sync
, backing_mode
,
3997 has_granularity
, granularity
,
3998 has_buf_size
, buf_size
,
3999 has_on_source_error
, on_source_error
,
4000 has_on_target_error
, on_target_error
,
4002 has_filter_node_name
, filter_node_name
,
4003 has_copy_mode
, copy_mode
,
4004 has_auto_finalize
, auto_finalize
,
4005 has_auto_dismiss
, auto_dismiss
,
4007 error_propagate(errp
, local_err
);
4009 aio_context_release(aio_context
);
4012 /* Get a block job using its ID and acquire its AioContext */
4013 static BlockJob
*find_block_job(const char *id
, AioContext
**aio_context
,
4020 *aio_context
= NULL
;
4022 job
= block_job_get(id
);
4025 error_set(errp
, ERROR_CLASS_DEVICE_NOT_ACTIVE
,
4026 "Block job '%s' not found", id
);
4030 *aio_context
= blk_get_aio_context(job
->blk
);
4031 aio_context_acquire(*aio_context
);
4036 void qmp_block_job_set_speed(const char *device
, int64_t speed
, Error
**errp
)
4038 AioContext
*aio_context
;
4039 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
4045 block_job_set_speed(job
, speed
, errp
);
4046 aio_context_release(aio_context
);
4049 void qmp_block_job_cancel(const char *device
,
4050 bool has_force
, bool force
, Error
**errp
)
4052 AioContext
*aio_context
;
4053 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
4063 if (job_user_paused(&job
->job
) && !force
) {
4064 error_setg(errp
, "The block job for device '%s' is currently paused",
4069 trace_qmp_block_job_cancel(job
);
4070 job_user_cancel(&job
->job
, force
, errp
);
4072 aio_context_release(aio_context
);
4075 void qmp_block_job_pause(const char *device
, Error
**errp
)
4077 AioContext
*aio_context
;
4078 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
4084 trace_qmp_block_job_pause(job
);
4085 job_user_pause(&job
->job
, errp
);
4086 aio_context_release(aio_context
);
4089 void qmp_block_job_resume(const char *device
, Error
**errp
)
4091 AioContext
*aio_context
;
4092 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
4098 trace_qmp_block_job_resume(job
);
4099 job_user_resume(&job
->job
, errp
);
4100 aio_context_release(aio_context
);
4103 void qmp_block_job_complete(const char *device
, Error
**errp
)
4105 AioContext
*aio_context
;
4106 BlockJob
*job
= find_block_job(device
, &aio_context
, errp
);
4112 trace_qmp_block_job_complete(job
);
4113 job_complete(&job
->job
, errp
);
4114 aio_context_release(aio_context
);
4117 void qmp_block_job_finalize(const char *id
, Error
**errp
)
4119 AioContext
*aio_context
;
4120 BlockJob
*job
= find_block_job(id
, &aio_context
, errp
);
4126 trace_qmp_block_job_finalize(job
);
4127 job_finalize(&job
->job
, errp
);
4128 aio_context_release(aio_context
);
4131 void qmp_block_job_dismiss(const char *id
, Error
**errp
)
4133 AioContext
*aio_context
;
4134 BlockJob
*bjob
= find_block_job(id
, &aio_context
, errp
);
4141 trace_qmp_block_job_dismiss(bjob
);
4143 job_dismiss(&job
, errp
);
4144 aio_context_release(aio_context
);
4147 void qmp_change_backing_file(const char *device
,
4148 const char *image_node_name
,
4149 const char *backing_file
,
4152 BlockDriverState
*bs
= NULL
;
4153 AioContext
*aio_context
;
4154 BlockDriverState
*image_bs
= NULL
;
4155 Error
*local_err
= NULL
;
4159 bs
= qmp_get_root_bs(device
, errp
);
4164 aio_context
= bdrv_get_aio_context(bs
);
4165 aio_context_acquire(aio_context
);
4167 image_bs
= bdrv_lookup_bs(NULL
, image_node_name
, &local_err
);
4169 error_propagate(errp
, local_err
);
4174 error_setg(errp
, "image file not found");
4178 if (bdrv_find_base(image_bs
) == image_bs
) {
4179 error_setg(errp
, "not allowing backing file change on an image "
4180 "without a backing file");
4184 /* even though we are not necessarily operating on bs, we need it to
4185 * determine if block ops are currently prohibited on the chain */
4186 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_CHANGE
, errp
)) {
4190 /* final sanity check */
4191 if (!bdrv_chain_contains(bs
, image_bs
)) {
4192 error_setg(errp
, "'%s' and image file are not in the same chain",
4197 /* if not r/w, reopen to make r/w */
4198 ro
= bdrv_is_read_only(image_bs
);
4201 if (bdrv_reopen_set_read_only(image_bs
, false, errp
) != 0) {
4206 ret
= bdrv_change_backing_file(image_bs
, backing_file
,
4207 image_bs
->drv
? image_bs
->drv
->format_name
: "");
4210 error_setg_errno(errp
, -ret
, "Could not change backing file to '%s'",
4212 /* don't exit here, so we can try to restore open flags if
4217 bdrv_reopen_set_read_only(image_bs
, true, &local_err
);
4218 error_propagate(errp
, local_err
);
4222 aio_context_release(aio_context
);
4225 void hmp_drive_add_node(Monitor
*mon
, const char *optstr
)
4229 Error
*local_err
= NULL
;
4231 opts
= qemu_opts_parse_noisily(&qemu_drive_opts
, optstr
, false);
4236 qdict
= qemu_opts_to_qdict(opts
, NULL
);
4238 if (!qdict_get_try_str(qdict
, "node-name")) {
4239 qobject_unref(qdict
);
4240 error_report("'node-name' needs to be specified");
4244 BlockDriverState
*bs
= bds_tree_init(qdict
, &local_err
);
4246 error_report_err(local_err
);
4250 QTAILQ_INSERT_TAIL(&monitor_bdrv_states
, bs
, monitor_list
);
4253 qemu_opts_del(opts
);
4256 void qmp_blockdev_add(BlockdevOptions
*options
, Error
**errp
)
4258 BlockDriverState
*bs
;
4260 Visitor
*v
= qobject_output_visitor_new(&obj
);
4262 Error
*local_err
= NULL
;
4264 visit_type_BlockdevOptions(v
, NULL
, &options
, &local_err
);
4266 error_propagate(errp
, local_err
);
4270 visit_complete(v
, &obj
);
4271 qdict
= qobject_to(QDict
, obj
);
4273 qdict_flatten(qdict
);
4275 if (!qdict_get_try_str(qdict
, "node-name")) {
4276 error_setg(errp
, "'node-name' must be specified for the root node");
4280 bs
= bds_tree_init(qdict
, errp
);
4285 QTAILQ_INSERT_TAIL(&monitor_bdrv_states
, bs
, monitor_list
);
4291 void qmp_x_blockdev_reopen(BlockdevOptions
*options
, Error
**errp
)
4293 BlockDriverState
*bs
;
4296 Visitor
*v
= qobject_output_visitor_new(&obj
);
4297 Error
*local_err
= NULL
;
4298 BlockReopenQueue
*queue
;
4301 /* Check for the selected node name */
4302 if (!options
->has_node_name
) {
4303 error_setg(errp
, "Node name not specified");
4307 bs
= bdrv_find_node(options
->node_name
);
4309 error_setg(errp
, "Cannot find node named '%s'", options
->node_name
);
4313 /* Put all options in a QDict and flatten it */
4314 visit_type_BlockdevOptions(v
, NULL
, &options
, &local_err
);
4316 error_propagate(errp
, local_err
);
4320 visit_complete(v
, &obj
);
4321 qdict
= qobject_to(QDict
, obj
);
4323 qdict_flatten(qdict
);
4325 /* Perform the reopen operation */
4326 ctx
= bdrv_get_aio_context(bs
);
4327 aio_context_acquire(ctx
);
4328 bdrv_subtree_drained_begin(bs
);
4329 queue
= bdrv_reopen_queue(NULL
, bs
, qdict
, false);
4330 bdrv_reopen_multiple(queue
, errp
);
4331 bdrv_subtree_drained_end(bs
);
4332 aio_context_release(ctx
);
4338 void qmp_blockdev_del(const char *node_name
, Error
**errp
)
4340 AioContext
*aio_context
;
4341 BlockDriverState
*bs
;
4343 bs
= bdrv_find_node(node_name
);
4345 error_setg(errp
, "Cannot find node %s", node_name
);
4348 if (bdrv_has_blk(bs
)) {
4349 error_setg(errp
, "Node %s is in use", node_name
);
4352 aio_context
= bdrv_get_aio_context(bs
);
4353 aio_context_acquire(aio_context
);
4355 if (bdrv_op_is_blocked(bs
, BLOCK_OP_TYPE_DRIVE_DEL
, errp
)) {
4359 if (!QTAILQ_IN_USE(bs
, monitor_list
)) {
4360 error_setg(errp
, "Node %s is not owned by the monitor",
4365 if (bs
->refcnt
> 1) {
4366 error_setg(errp
, "Block device %s is in use",
4367 bdrv_get_device_or_node_name(bs
));
4371 QTAILQ_REMOVE(&monitor_bdrv_states
, bs
, monitor_list
);
4375 aio_context_release(aio_context
);
4378 static BdrvChild
*bdrv_find_child(BlockDriverState
*parent_bs
,
4379 const char *child_name
)
4383 QLIST_FOREACH(child
, &parent_bs
->children
, next
) {
4384 if (strcmp(child
->name
, child_name
) == 0) {
4392 void qmp_x_blockdev_change(const char *parent
, bool has_child
,
4393 const char *child
, bool has_node
,
4394 const char *node
, Error
**errp
)
4396 BlockDriverState
*parent_bs
, *new_bs
= NULL
;
4399 parent_bs
= bdrv_lookup_bs(parent
, parent
, errp
);
4404 if (has_child
== has_node
) {
4406 error_setg(errp
, "The parameters child and node are in conflict");
4408 error_setg(errp
, "Either child or node must be specified");
4414 p_child
= bdrv_find_child(parent_bs
, child
);
4416 error_setg(errp
, "Node '%s' does not have child '%s'",
4420 bdrv_del_child(parent_bs
, p_child
, errp
);
4424 new_bs
= bdrv_find_node(node
);
4426 error_setg(errp
, "Node '%s' not found", node
);
4429 bdrv_add_child(parent_bs
, new_bs
, errp
);
4433 BlockJobInfoList
*qmp_query_block_jobs(Error
**errp
)
4435 BlockJobInfoList
*head
= NULL
, **p_next
= &head
;
4438 for (job
= block_job_next(NULL
); job
; job
= block_job_next(job
)) {
4439 BlockJobInfoList
*elem
;
4440 AioContext
*aio_context
;
4442 if (block_job_is_internal(job
)) {
4445 elem
= g_new0(BlockJobInfoList
, 1);
4446 aio_context
= blk_get_aio_context(job
->blk
);
4447 aio_context_acquire(aio_context
);
4448 elem
->value
= block_job_query(job
, errp
);
4449 aio_context_release(aio_context
);
4452 qapi_free_BlockJobInfoList(head
);
4456 p_next
= &elem
->next
;
4462 void qmp_x_blockdev_set_iothread(const char *node_name
, StrOrNull
*iothread
,
4463 bool has_force
, bool force
, Error
**errp
)
4465 AioContext
*old_context
;
4466 AioContext
*new_context
;
4467 BlockDriverState
*bs
;
4469 bs
= bdrv_find_node(node_name
);
4471 error_setg(errp
, "Cannot find node %s", node_name
);
4475 /* Protects against accidents. */
4476 if (!(has_force
&& force
) && bdrv_has_blk(bs
)) {
4477 error_setg(errp
, "Node %s is associated with a BlockBackend and could "
4478 "be in use (use force=true to override this check)",
4483 if (iothread
->type
== QTYPE_QSTRING
) {
4484 IOThread
*obj
= iothread_by_id(iothread
->u
.s
);
4486 error_setg(errp
, "Cannot find iothread %s", iothread
->u
.s
);
4490 new_context
= iothread_get_aio_context(obj
);
4492 new_context
= qemu_get_aio_context();
4495 old_context
= bdrv_get_aio_context(bs
);
4496 aio_context_acquire(old_context
);
4498 bdrv_set_aio_context(bs
, new_context
);
4500 aio_context_release(old_context
);
4503 void qmp_block_latency_histogram_set(
4505 bool has_boundaries
, uint64List
*boundaries
,
4506 bool has_boundaries_read
, uint64List
*boundaries_read
,
4507 bool has_boundaries_write
, uint64List
*boundaries_write
,
4508 bool has_boundaries_flush
, uint64List
*boundaries_flush
,
4511 BlockBackend
*blk
= qmp_get_blk(NULL
, id
, errp
);
4512 BlockAcctStats
*stats
;
4519 stats
= blk_get_stats(blk
);
4521 if (!has_boundaries
&& !has_boundaries_read
&& !has_boundaries_write
&&
4522 !has_boundaries_flush
)
4524 block_latency_histograms_clear(stats
);
4528 if (has_boundaries
|| has_boundaries_read
) {
4529 ret
= block_latency_histogram_set(
4530 stats
, BLOCK_ACCT_READ
,
4531 has_boundaries_read
? boundaries_read
: boundaries
);
4533 error_setg(errp
, "Device '%s' set read boundaries fail", id
);
4538 if (has_boundaries
|| has_boundaries_write
) {
4539 ret
= block_latency_histogram_set(
4540 stats
, BLOCK_ACCT_WRITE
,
4541 has_boundaries_write
? boundaries_write
: boundaries
);
4543 error_setg(errp
, "Device '%s' set write boundaries fail", id
);
4548 if (has_boundaries
|| has_boundaries_flush
) {
4549 ret
= block_latency_histogram_set(
4550 stats
, BLOCK_ACCT_FLUSH
,
4551 has_boundaries_flush
? boundaries_flush
: boundaries
);
4553 error_setg(errp
, "Device '%s' set flush boundaries fail", id
);
4559 QemuOptsList qemu_common_drive_opts
= {
4561 .head
= QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts
.head
),
4565 .type
= QEMU_OPT_BOOL
,
4566 .help
= "enable/disable snapshot mode",
4569 .type
= QEMU_OPT_STRING
,
4570 .help
= "host AIO implementation (threads, native)",
4572 .name
= BDRV_OPT_CACHE_WB
,
4573 .type
= QEMU_OPT_BOOL
,
4574 .help
= "Enable writeback mode",
4577 .type
= QEMU_OPT_STRING
,
4578 .help
= "disk format (raw, qcow2, ...)",
4581 .type
= QEMU_OPT_STRING
,
4582 .help
= "read error action",
4585 .type
= QEMU_OPT_STRING
,
4586 .help
= "write error action",
4588 .name
= BDRV_OPT_READ_ONLY
,
4589 .type
= QEMU_OPT_BOOL
,
4590 .help
= "open drive file as read-only",
4596 .name
= "throttling.group",
4597 .type
= QEMU_OPT_STRING
,
4598 .help
= "name of the block throttling group",
4600 .name
= "copy-on-read",
4601 .type
= QEMU_OPT_BOOL
,
4602 .help
= "copy read data from backing file into image file",
4604 .name
= "detect-zeroes",
4605 .type
= QEMU_OPT_STRING
,
4606 .help
= "try to optimize zero writes (off, on, unmap)",
4608 .name
= "stats-account-invalid",
4609 .type
= QEMU_OPT_BOOL
,
4610 .help
= "whether to account for invalid I/O operations "
4611 "in the statistics",
4613 .name
= "stats-account-failed",
4614 .type
= QEMU_OPT_BOOL
,
4615 .help
= "whether to account for failed I/O operations "
4616 "in the statistics",
4618 { /* end of list */ }
4622 QemuOptsList qemu_drive_opts
= {
4624 .head
= QTAILQ_HEAD_INITIALIZER(qemu_drive_opts
.head
),
4627 * no elements => accept any params
4628 * validation will happen later
4630 { /* end of list */ }