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 "sysemu/blockdev.h"
34 #include "hw/block/block.h"
35 #include "block/blockjob.h"
36 #include "monitor/monitor.h"
37 #include "qapi/qmp/qerror.h"
38 #include "qemu/option.h"
39 #include "qemu/config-file.h"
40 #include "qapi/qmp/types.h"
41 #include "sysemu/sysemu.h"
42 #include "block/block_int.h"
43 #include "qmp-commands.h"
45 #include "sysemu/arch_init.h"
47 static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
48 extern QemuOptsList qemu_common_drive_opts;
49 extern QemuOptsList qemu_old_drive_opts;
51 static const char *const if_name[IF_COUNT] = {
55 [IF_FLOPPY] = "floppy",
56 [IF_PFLASH] = "pflash",
59 [IF_VIRTIO] = "virtio",
63 static const int if_max_devs[IF_COUNT] = {
65 * Do not change these numbers! They govern how drive option
66 * index maps to unit and bus. That mapping is ABI.
68 * All controllers used to imlement if=T drives need to support
69 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
70 * Otherwise, some index values map to "impossible" bus, unit
73 * For instance, if you change [IF_SCSI] to 255, -drive
74 * if=scsi,index=12 no longer means bus=1,unit=5, but
75 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
76 * the drive can't be set up. Regression.
83 * We automatically delete the drive when a device using it gets
84 * unplugged. Questionable feature, but we can't just drop it.
85 * Device models call blockdev_mark_auto_del() to schedule the
86 * automatic deletion, and generic qdev code calls blockdev_auto_del()
87 * when deletion is actually safe.
89 void blockdev_mark_auto_del(BlockDriverState *bs)
91 DriveInfo *dinfo = drive_get_by_blockdev(bs);
94 block_job_cancel(bs->job);
101 void blockdev_auto_del(BlockDriverState *bs)
103 DriveInfo *dinfo = drive_get_by_blockdev(bs);
105 if (dinfo && dinfo->auto_del) {
106 drive_put_ref(dinfo);
110 static int drive_index_to_bus_id(BlockInterfaceType type, int index)
112 int max_devs = if_max_devs[type];
113 return max_devs ? index / max_devs : 0;
116 static int drive_index_to_unit_id(BlockInterfaceType type, int index)
118 int max_devs = if_max_devs[type];
119 return max_devs ? index % max_devs : index;
122 QemuOpts *drive_def(const char *optstr)
124 return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0);
127 QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
133 opts = drive_def(optstr);
137 if (type != IF_DEFAULT) {
138 qemu_opt_set(opts, "if", if_name[type]);
141 snprintf(buf, sizeof(buf), "%d", index);
142 qemu_opt_set(opts, "index", buf);
145 qemu_opt_set(opts, "file", file);
149 DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
153 /* seek interface, bus and unit */
155 QTAILQ_FOREACH(dinfo, &drives, next) {
156 if (dinfo->type == type &&
165 DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
167 return drive_get(type,
168 drive_index_to_bus_id(type, index),
169 drive_index_to_unit_id(type, index));
172 int drive_get_max_bus(BlockInterfaceType type)
178 QTAILQ_FOREACH(dinfo, &drives, next) {
179 if(dinfo->type == type &&
180 dinfo->bus > max_bus)
181 max_bus = dinfo->bus;
186 /* Get a block device. This should only be used for single-drive devices
187 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
189 DriveInfo *drive_get_next(BlockInterfaceType type)
191 static int next_block_unit[IF_COUNT];
193 return drive_get(type, 0, next_block_unit[type]++);
196 DriveInfo *drive_get_by_blockdev(BlockDriverState *bs)
200 QTAILQ_FOREACH(dinfo, &drives, next) {
201 if (dinfo->bdrv == bs) {
208 static void bdrv_format_print(void *opaque, const char *name)
210 error_printf(" %s", name);
213 static void drive_uninit(DriveInfo *dinfo)
215 qemu_opts_del(dinfo->opts);
216 bdrv_delete(dinfo->bdrv);
218 QTAILQ_REMOVE(&drives, dinfo, next);
219 g_free(dinfo->serial);
223 void drive_put_ref(DriveInfo *dinfo)
225 assert(dinfo->refcount);
226 if (--dinfo->refcount == 0) {
231 void drive_get_ref(DriveInfo *dinfo)
241 static void drive_put_ref_bh(void *opaque)
243 DrivePutRefBH *s = opaque;
245 drive_put_ref(s->dinfo);
246 qemu_bh_delete(s->bh);
251 * Release a drive reference in a BH
253 * It is not possible to use drive_put_ref() from a callback function when the
254 * callers still need the drive. In such cases we schedule a BH to release the
257 static void drive_put_ref_bh_schedule(DriveInfo *dinfo)
261 s = g_new(DrivePutRefBH, 1);
262 s->bh = qemu_bh_new(drive_put_ref_bh, s);
264 qemu_bh_schedule(s->bh);
267 static int parse_block_error_action(const char *buf, bool is_read)
269 if (!strcmp(buf, "ignore")) {
270 return BLOCKDEV_ON_ERROR_IGNORE;
271 } else if (!is_read && !strcmp(buf, "enospc")) {
272 return BLOCKDEV_ON_ERROR_ENOSPC;
273 } else if (!strcmp(buf, "stop")) {
274 return BLOCKDEV_ON_ERROR_STOP;
275 } else if (!strcmp(buf, "report")) {
276 return BLOCKDEV_ON_ERROR_REPORT;
278 error_report("'%s' invalid %s error action",
279 buf, is_read ? "read" : "write");
284 static bool do_check_io_limits(BlockIOLimit *io_limits, Error **errp)
291 bps_flag = (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] != 0)
292 && ((io_limits->bps[BLOCK_IO_LIMIT_READ] != 0)
293 || (io_limits->bps[BLOCK_IO_LIMIT_WRITE] != 0));
294 iops_flag = (io_limits->iops[BLOCK_IO_LIMIT_TOTAL] != 0)
295 && ((io_limits->iops[BLOCK_IO_LIMIT_READ] != 0)
296 || (io_limits->iops[BLOCK_IO_LIMIT_WRITE] != 0));
297 if (bps_flag || iops_flag) {
298 error_setg(errp, "bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) "
299 "cannot be used at the same time");
303 if (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] < 0 ||
304 io_limits->bps[BLOCK_IO_LIMIT_WRITE] < 0 ||
305 io_limits->bps[BLOCK_IO_LIMIT_READ] < 0 ||
306 io_limits->iops[BLOCK_IO_LIMIT_TOTAL] < 0 ||
307 io_limits->iops[BLOCK_IO_LIMIT_WRITE] < 0 ||
308 io_limits->iops[BLOCK_IO_LIMIT_READ] < 0) {
309 error_setg(errp, "bps and iops values must be 0 or greater");
316 static DriveInfo *blockdev_init(QemuOpts *all_opts,
317 BlockInterfaceType block_default_type)
320 const char *file = NULL;
322 const char *mediastr = "";
323 BlockInterfaceType type;
324 enum { MEDIA_DISK, MEDIA_CDROM } media;
326 int cyls, heads, secs, translation;
331 int on_read_error, on_write_error;
334 BlockIOLimit io_limits;
342 bool has_driver_specific_opts;
343 BlockDriver *drv = NULL;
345 translation = BIOS_ATA_TRANSLATION_AUTO;
348 /* Check common options by copying from all_opts to opts, all other options
349 * are stored in bs_opts. */
350 id = qemu_opts_id(all_opts);
351 opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
352 if (error_is_set(&error)) {
353 qerror_report_err(error);
358 bs_opts = qdict_new();
359 qemu_opts_to_qdict(all_opts, bs_opts);
360 qemu_opts_absorb_qdict(opts, bs_opts, &error);
361 if (error_is_set(&error)) {
362 qerror_report_err(error);
368 qdict_del(bs_opts, "id");
371 has_driver_specific_opts = !!qdict_size(bs_opts);
373 /* extract parameters */
374 bus_id = qemu_opt_get_number(opts, "bus", 0);
375 unit_id = qemu_opt_get_number(opts, "unit", -1);
376 index = qemu_opt_get_number(opts, "index", -1);
378 cyls = qemu_opt_get_number(opts, "cyls", 0);
379 heads = qemu_opt_get_number(opts, "heads", 0);
380 secs = qemu_opt_get_number(opts, "secs", 0);
382 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
383 ro = qemu_opt_get_bool(opts, "read-only", 0);
384 copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false);
386 file = qemu_opt_get(opts, "file");
387 serial = qemu_opt_get(opts, "serial");
389 if ((buf = qemu_opt_get(opts, "if")) != NULL) {
390 for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++)
392 if (type == IF_COUNT) {
393 error_report("unsupported bus type '%s'", buf);
397 type = block_default_type;
400 max_devs = if_max_devs[type];
402 if (cyls || heads || secs) {
404 error_report("invalid physical cyls number");
408 error_report("invalid physical heads number");
412 error_report("invalid physical secs number");
417 if ((buf = qemu_opt_get(opts, "trans")) != NULL) {
419 error_report("'%s' trans must be used with cyls, heads and secs",
423 if (!strcmp(buf, "none"))
424 translation = BIOS_ATA_TRANSLATION_NONE;
425 else if (!strcmp(buf, "lba"))
426 translation = BIOS_ATA_TRANSLATION_LBA;
427 else if (!strcmp(buf, "auto"))
428 translation = BIOS_ATA_TRANSLATION_AUTO;
430 error_report("'%s' invalid translation type", buf);
435 if ((buf = qemu_opt_get(opts, "media")) != NULL) {
436 if (!strcmp(buf, "disk")) {
438 } else if (!strcmp(buf, "cdrom")) {
439 if (cyls || secs || heads) {
440 error_report("CHS can't be set with media=%s", buf);
445 error_report("'%s' invalid media", buf);
450 if ((buf = qemu_opt_get(opts, "discard")) != NULL) {
451 if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) {
452 error_report("invalid discard option");
457 if (qemu_opt_get_bool(opts, "cache.writeback", true)) {
458 bdrv_flags |= BDRV_O_CACHE_WB;
460 if (qemu_opt_get_bool(opts, "cache.direct", false)) {
461 bdrv_flags |= BDRV_O_NOCACHE;
463 if (qemu_opt_get_bool(opts, "cache.no-flush", true)) {
464 bdrv_flags |= BDRV_O_NO_FLUSH;
467 #ifdef CONFIG_LINUX_AIO
468 if ((buf = qemu_opt_get(opts, "aio")) != NULL) {
469 if (!strcmp(buf, "native")) {
470 bdrv_flags |= BDRV_O_NATIVE_AIO;
471 } else if (!strcmp(buf, "threads")) {
472 /* this is the default */
474 error_report("invalid aio option");
480 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
481 if (is_help_option(buf)) {
482 error_printf("Supported formats:");
483 bdrv_iterate_format(bdrv_format_print, NULL);
488 drv = bdrv_find_whitelisted_format(buf, ro);
490 if (!ro && bdrv_find_whitelisted_format(buf, !ro)) {
491 error_report("'%s' can be only used as read-only device.", buf);
493 error_report("'%s' invalid format", buf);
499 /* disk I/O throttling */
500 io_limits.bps[BLOCK_IO_LIMIT_TOTAL] =
501 qemu_opt_get_number(opts, "throttling.bps-total", 0);
502 io_limits.bps[BLOCK_IO_LIMIT_READ] =
503 qemu_opt_get_number(opts, "throttling.bps-read", 0);
504 io_limits.bps[BLOCK_IO_LIMIT_WRITE] =
505 qemu_opt_get_number(opts, "throttling.bps-write", 0);
506 io_limits.iops[BLOCK_IO_LIMIT_TOTAL] =
507 qemu_opt_get_number(opts, "throttling.iops-total", 0);
508 io_limits.iops[BLOCK_IO_LIMIT_READ] =
509 qemu_opt_get_number(opts, "throttling.iops-read", 0);
510 io_limits.iops[BLOCK_IO_LIMIT_WRITE] =
511 qemu_opt_get_number(opts, "throttling.iops-write", 0);
513 if (!do_check_io_limits(&io_limits, &error)) {
514 error_report("%s", error_get_pretty(error));
519 if (qemu_opt_get(opts, "boot") != NULL) {
520 fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
521 "ignored. Future versions will reject this parameter. Please "
522 "update your scripts.\n");
525 on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
526 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
527 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
528 error_report("werror is not supported by this bus type");
532 on_write_error = parse_block_error_action(buf, 0);
533 if (on_write_error < 0) {
538 on_read_error = BLOCKDEV_ON_ERROR_REPORT;
539 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
540 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
541 error_report("rerror is not supported by this bus type");
545 on_read_error = parse_block_error_action(buf, 1);
546 if (on_read_error < 0) {
551 if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) {
552 if (type != IF_VIRTIO) {
553 error_report("addr is not supported by this bus type");
558 /* compute bus and unit according index */
561 if (bus_id != 0 || unit_id != -1) {
562 error_report("index cannot be used with bus and unit");
565 bus_id = drive_index_to_bus_id(type, index);
566 unit_id = drive_index_to_unit_id(type, index);
569 /* if user doesn't specify a unit_id,
570 * try to find the first free
575 while (drive_get(type, bus_id, unit_id) != NULL) {
577 if (max_devs && unit_id >= max_devs) {
586 if (max_devs && unit_id >= max_devs) {
587 error_report("unit %d too big (max is %d)",
588 unit_id, max_devs - 1);
593 * catch multiple definitions
596 if (drive_get(type, bus_id, unit_id) != NULL) {
597 error_report("drive with bus=%d, unit=%d (index=%d) exists",
598 bus_id, unit_id, index);
604 dinfo = g_malloc0(sizeof(*dinfo));
605 if ((buf = qemu_opts_id(opts)) != NULL) {
606 dinfo->id = g_strdup(buf);
608 /* no id supplied -> create one */
609 dinfo->id = g_malloc0(32);
610 if (type == IF_IDE || type == IF_SCSI)
611 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
613 snprintf(dinfo->id, 32, "%s%i%s%i",
614 if_name[type], bus_id, mediastr, unit_id);
616 snprintf(dinfo->id, 32, "%s%s%i",
617 if_name[type], mediastr, unit_id);
619 dinfo->bdrv = bdrv_new(dinfo->id);
620 dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
621 dinfo->bdrv->read_only = ro;
622 dinfo->devaddr = devaddr;
625 dinfo->unit = unit_id;
627 dinfo->heads = heads;
629 dinfo->trans = translation;
630 dinfo->opts = all_opts;
632 if (serial != NULL) {
633 dinfo->serial = g_strdup(serial);
635 QTAILQ_INSERT_TAIL(&drives, dinfo, next);
637 bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error);
639 /* disk I/O throttling */
640 bdrv_set_io_limits(dinfo->bdrv, &io_limits);
647 dinfo->media_cd = media == MEDIA_CDROM;
656 /* add virtio block device */
658 devopts = qemu_opts_create_nofail(qemu_find_opts("device"));
659 if (arch_type == QEMU_ARCH_S390X) {
660 qemu_opt_set(devopts, "driver", "virtio-blk-s390");
662 qemu_opt_set(devopts, "driver", "virtio-blk-pci");
664 qemu_opt_set(devopts, "drive", dinfo->id);
666 qemu_opt_set(devopts, "addr", devaddr);
672 if (!file || !*file) {
673 if (has_driver_specific_opts) {
680 /* always use cache=unsafe with snapshot */
681 bdrv_flags &= ~BDRV_O_CACHE_MASK;
682 bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
686 bdrv_flags |= BDRV_O_COPY_ON_READ;
689 if (runstate_check(RUN_STATE_INMIGRATE)) {
690 bdrv_flags |= BDRV_O_INCOMING;
693 if (media == MEDIA_CDROM) {
694 /* CDROM is fine for any interface, don't check. */
696 } else if (ro == 1) {
697 if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY &&
698 type != IF_NONE && type != IF_PFLASH) {
699 error_report("read-only not supported by this bus type");
704 bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
706 if (ro && copy_on_read) {
707 error_report("warning: disabling copy_on_read on read-only drive");
711 ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, drv);
714 if (ret == -EMEDIUMTYPE) {
715 error_report("could not open disk image %s: not in %s format",
716 file ?: dinfo->id, drv ? drv->format_name :
717 qdict_get_str(bs_opts, "driver"));
719 error_report("could not open disk image %s: %s",
720 file ?: dinfo->id, strerror(-ret));
725 if (bdrv_key_required(dinfo->bdrv))
736 bdrv_delete(dinfo->bdrv);
738 QTAILQ_REMOVE(&drives, dinfo, next);
743 static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to)
747 value = qemu_opt_get(opts, from);
749 qemu_opt_set(opts, to, value);
750 qemu_opt_unset(opts, from);
754 DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)
759 * Check that only old options are used by copying into a QemuOpts with
760 * stricter checks. Going through a QDict seems to be the easiest way to
763 QemuOpts* check_opts;
765 Error *local_err = NULL;
767 qdict = qemu_opts_to_qdict(all_opts, NULL);
768 check_opts = qemu_opts_from_qdict(&qemu_old_drive_opts, qdict, &local_err);
771 if (error_is_set(&local_err)) {
772 qerror_report_err(local_err);
773 error_free(local_err);
776 qemu_opts_del(check_opts);
778 /* Change legacy command line options into QMP ones */
779 qemu_opt_rename(all_opts, "iops", "throttling.iops-total");
780 qemu_opt_rename(all_opts, "iops_rd", "throttling.iops-read");
781 qemu_opt_rename(all_opts, "iops_wr", "throttling.iops-write");
783 qemu_opt_rename(all_opts, "bps", "throttling.bps-total");
784 qemu_opt_rename(all_opts, "bps_rd", "throttling.bps-read");
785 qemu_opt_rename(all_opts, "bps_wr", "throttling.bps-write");
787 qemu_opt_rename(all_opts, "readonly", "read-only");
789 value = qemu_opt_get(all_opts, "cache");
793 if (bdrv_parse_cache_flags(value, &flags) != 0) {
794 error_report("invalid cache option");
798 /* Specific options take precedence */
799 if (!qemu_opt_get(all_opts, "cache.writeback")) {
800 qemu_opt_set_bool(all_opts, "cache.writeback",
801 !!(flags & BDRV_O_CACHE_WB));
803 if (!qemu_opt_get(all_opts, "cache.direct")) {
804 qemu_opt_set_bool(all_opts, "cache.direct",
805 !!(flags & BDRV_O_NOCACHE));
807 if (!qemu_opt_get(all_opts, "cache.no-flush")) {
808 qemu_opt_set_bool(all_opts, "cache.no-flush",
809 !!(flags & BDRV_O_NO_FLUSH));
811 qemu_opt_unset(all_opts, "cache");
814 return blockdev_init(all_opts, block_default_type);
817 void do_commit(Monitor *mon, const QDict *qdict)
819 const char *device = qdict_get_str(qdict, "device");
820 BlockDriverState *bs;
823 if (!strcmp(device, "all")) {
824 ret = bdrv_commit_all();
826 bs = bdrv_find(device);
828 monitor_printf(mon, "Device '%s' not found\n", device);
831 ret = bdrv_commit(bs);
834 monitor_printf(mon, "'commit' error for '%s': %s\n", device,
839 static void blockdev_do_action(int kind, void *data, Error **errp)
841 TransactionAction action;
842 TransactionActionList list;
846 list.value = &action;
848 qmp_transaction(&list, errp);
851 void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file,
852 bool has_format, const char *format,
853 bool has_mode, enum NewImageMode mode,
856 BlockdevSnapshot snapshot = {
857 .device = (char *) device,
858 .snapshot_file = (char *) snapshot_file,
859 .has_format = has_format,
860 .format = (char *) format,
861 .has_mode = has_mode,
864 blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
869 /* New and old BlockDriverState structs for group snapshots */
871 typedef struct BlkTransactionState BlkTransactionState;
873 /* Only prepare() may fail. In a single transaction, only one of commit() or
874 abort() will be called, clean() will always be called if it present. */
875 typedef struct BdrvActionOps {
876 /* Size of state struct, in bytes. */
877 size_t instance_size;
878 /* Prepare the work, must NOT be NULL. */
879 void (*prepare)(BlkTransactionState *common, Error **errp);
880 /* Commit the changes, can be NULL. */
881 void (*commit)(BlkTransactionState *common);
882 /* Abort the changes on fail, can be NULL. */
883 void (*abort)(BlkTransactionState *common);
884 /* Clean up resource in the end, can be NULL. */
885 void (*clean)(BlkTransactionState *common);
889 * This structure must be arranged as first member in child type, assuming
890 * that compiler will also arrange it to the same address with parent instance.
891 * Later it will be used in free().
893 struct BlkTransactionState {
894 TransactionAction *action;
895 const BdrvActionOps *ops;
896 QSIMPLEQ_ENTRY(BlkTransactionState) entry;
899 /* external snapshot private data */
900 typedef struct ExternalSnapshotState {
901 BlkTransactionState common;
902 BlockDriverState *old_bs;
903 BlockDriverState *new_bs;
904 } ExternalSnapshotState;
906 static void external_snapshot_prepare(BlkTransactionState *common,
911 Error *local_err = NULL;
913 const char *new_image_file;
914 const char *format = "qcow2";
915 enum NewImageMode mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
916 ExternalSnapshotState *state =
917 DO_UPCAST(ExternalSnapshotState, common, common);
918 TransactionAction *action = common->action;
921 g_assert(action->kind == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC);
923 device = action->blockdev_snapshot_sync->device;
924 new_image_file = action->blockdev_snapshot_sync->snapshot_file;
925 if (action->blockdev_snapshot_sync->has_format) {
926 format = action->blockdev_snapshot_sync->format;
928 if (action->blockdev_snapshot_sync->has_mode) {
929 mode = action->blockdev_snapshot_sync->mode;
932 /* start processing */
933 drv = bdrv_find_format(format);
935 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
939 state->old_bs = bdrv_find(device);
940 if (!state->old_bs) {
941 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
945 if (!bdrv_is_inserted(state->old_bs)) {
946 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
950 if (bdrv_in_use(state->old_bs)) {
951 error_set(errp, QERR_DEVICE_IN_USE, device);
955 if (!bdrv_is_read_only(state->old_bs)) {
956 if (bdrv_flush(state->old_bs)) {
957 error_set(errp, QERR_IO_ERROR);
962 flags = state->old_bs->open_flags;
964 /* create new image w/backing file */
965 if (mode != NEW_IMAGE_MODE_EXISTING) {
966 bdrv_img_create(new_image_file, format,
967 state->old_bs->filename,
968 state->old_bs->drv->format_name,
969 NULL, -1, flags, &local_err, false);
970 if (error_is_set(&local_err)) {
971 error_propagate(errp, local_err);
976 /* We will manually add the backing_hd field to the bs later */
977 state->new_bs = bdrv_new("");
978 /* TODO Inherit bs->options or only take explicit options with an
979 * extended QMP command? */
980 ret = bdrv_open(state->new_bs, new_image_file, NULL,
981 flags | BDRV_O_NO_BACKING, drv);
983 error_setg_file_open(errp, -ret, new_image_file);
987 static void external_snapshot_commit(BlkTransactionState *common)
989 ExternalSnapshotState *state =
990 DO_UPCAST(ExternalSnapshotState, common, common);
992 /* This removes our old bs and adds the new bs */
993 bdrv_append(state->new_bs, state->old_bs);
994 /* We don't need (or want) to use the transactional
995 * bdrv_reopen_multiple() across all the entries at once, because we
996 * don't want to abort all of them if one of them fails the reopen */
997 bdrv_reopen(state->new_bs, state->new_bs->open_flags & ~BDRV_O_RDWR,
1001 static void external_snapshot_abort(BlkTransactionState *common)
1003 ExternalSnapshotState *state =
1004 DO_UPCAST(ExternalSnapshotState, common, common);
1005 if (state->new_bs) {
1006 bdrv_delete(state->new_bs);
1010 typedef struct DriveBackupState {
1011 BlkTransactionState common;
1012 BlockDriverState *bs;
1016 static void drive_backup_prepare(BlkTransactionState *common, Error **errp)
1018 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1019 DriveBackup *backup;
1020 Error *local_err = NULL;
1022 assert(common->action->kind == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
1023 backup = common->action->drive_backup;
1025 qmp_drive_backup(backup->device, backup->target,
1026 backup->has_format, backup->format,
1028 backup->has_mode, backup->mode,
1029 backup->has_speed, backup->speed,
1030 backup->has_on_source_error, backup->on_source_error,
1031 backup->has_on_target_error, backup->on_target_error,
1033 if (error_is_set(&local_err)) {
1034 error_propagate(errp, local_err);
1040 state->bs = bdrv_find(backup->device);
1041 state->job = state->bs->job;
1044 static void drive_backup_abort(BlkTransactionState *common)
1046 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1047 BlockDriverState *bs = state->bs;
1049 /* Only cancel if it's the job we started */
1050 if (bs && bs->job && bs->job == state->job) {
1051 block_job_cancel_sync(bs->job);
1055 static void abort_prepare(BlkTransactionState *common, Error **errp)
1057 error_setg(errp, "Transaction aborted using Abort action");
1060 static void abort_commit(BlkTransactionState *common)
1062 g_assert_not_reached(); /* this action never succeeds */
1065 static const BdrvActionOps actions[] = {
1066 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
1067 .instance_size = sizeof(ExternalSnapshotState),
1068 .prepare = external_snapshot_prepare,
1069 .commit = external_snapshot_commit,
1070 .abort = external_snapshot_abort,
1072 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
1073 .instance_size = sizeof(DriveBackupState),
1074 .prepare = drive_backup_prepare,
1075 .abort = drive_backup_abort,
1077 [TRANSACTION_ACTION_KIND_ABORT] = {
1078 .instance_size = sizeof(BlkTransactionState),
1079 .prepare = abort_prepare,
1080 .commit = abort_commit,
1085 * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
1086 * then we do not pivot any of the devices in the group, and abandon the
1089 void qmp_transaction(TransactionActionList *dev_list, Error **errp)
1091 TransactionActionList *dev_entry = dev_list;
1092 BlkTransactionState *state, *next;
1093 Error *local_err = NULL;
1095 QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionState) snap_bdrv_states;
1096 QSIMPLEQ_INIT(&snap_bdrv_states);
1098 /* drain all i/o before any snapshots */
1101 /* We don't do anything in this loop that commits us to the snapshot */
1102 while (NULL != dev_entry) {
1103 TransactionAction *dev_info = NULL;
1104 const BdrvActionOps *ops;
1106 dev_info = dev_entry->value;
1107 dev_entry = dev_entry->next;
1109 assert(dev_info->kind < ARRAY_SIZE(actions));
1111 ops = &actions[dev_info->kind];
1112 state = g_malloc0(ops->instance_size);
1114 state->action = dev_info;
1115 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
1117 state->ops->prepare(state, &local_err);
1118 if (error_is_set(&local_err)) {
1119 error_propagate(errp, local_err);
1120 goto delete_and_fail;
1124 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
1125 if (state->ops->commit) {
1126 state->ops->commit(state);
1135 * failure, and it is all-or-none; abandon each new bs, and keep using
1136 * the original bs for all images
1138 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
1139 if (state->ops->abort) {
1140 state->ops->abort(state);
1144 QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
1145 if (state->ops->clean) {
1146 state->ops->clean(state);
1153 static void eject_device(BlockDriverState *bs, int force, Error **errp)
1155 if (bdrv_in_use(bs)) {
1156 error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs));
1159 if (!bdrv_dev_has_removable_media(bs)) {
1160 error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs));
1164 if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) {
1165 bdrv_dev_eject_request(bs, force);
1167 error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs));
1175 void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
1177 BlockDriverState *bs;
1179 bs = bdrv_find(device);
1181 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1185 eject_device(bs, force, errp);
1188 void qmp_block_passwd(const char *device, const char *password, Error **errp)
1190 BlockDriverState *bs;
1193 bs = bdrv_find(device);
1195 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1199 err = bdrv_set_key(bs, password);
1200 if (err == -EINVAL) {
1201 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
1203 } else if (err < 0) {
1204 error_set(errp, QERR_INVALID_PASSWORD);
1209 static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename,
1210 int bdrv_flags, BlockDriver *drv,
1211 const char *password, Error **errp)
1215 ret = bdrv_open(bs, filename, NULL, bdrv_flags, drv);
1217 error_setg_file_open(errp, -ret, filename);
1221 if (bdrv_key_required(bs)) {
1223 if (bdrv_set_key(bs, password) < 0) {
1224 error_set(errp, QERR_INVALID_PASSWORD);
1227 error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs),
1228 bdrv_get_encrypted_filename(bs));
1230 } else if (password) {
1231 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
1235 void qmp_change_blockdev(const char *device, const char *filename,
1236 bool has_format, const char *format, Error **errp)
1238 BlockDriverState *bs;
1239 BlockDriver *drv = NULL;
1243 bs = bdrv_find(device);
1245 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1250 drv = bdrv_find_whitelisted_format(format, bs->read_only);
1252 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1257 eject_device(bs, 0, &err);
1258 if (error_is_set(&err)) {
1259 error_propagate(errp, err);
1263 bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
1264 bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
1266 qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
1269 /* throttling disk I/O limits */
1270 void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
1271 int64_t bps_wr, int64_t iops, int64_t iops_rd,
1272 int64_t iops_wr, Error **errp)
1274 BlockIOLimit io_limits;
1275 BlockDriverState *bs;
1277 bs = bdrv_find(device);
1279 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1283 io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = bps;
1284 io_limits.bps[BLOCK_IO_LIMIT_READ] = bps_rd;
1285 io_limits.bps[BLOCK_IO_LIMIT_WRITE] = bps_wr;
1286 io_limits.iops[BLOCK_IO_LIMIT_TOTAL]= iops;
1287 io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd;
1288 io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr;
1290 if (!do_check_io_limits(&io_limits, errp)) {
1294 bs->io_limits = io_limits;
1296 if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) {
1297 bdrv_io_limits_enable(bs);
1298 } else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) {
1299 bdrv_io_limits_disable(bs);
1301 if (bs->block_timer) {
1302 timer_mod(bs->block_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
1307 int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
1309 const char *id = qdict_get_str(qdict, "id");
1310 BlockDriverState *bs;
1314 qerror_report(QERR_DEVICE_NOT_FOUND, id);
1317 if (bdrv_in_use(bs)) {
1318 qerror_report(QERR_DEVICE_IN_USE, id);
1322 /* quiesce block driver; prevent further io */
1327 /* if we have a device attached to this BlockDriverState
1328 * then we need to make the drive anonymous until the device
1329 * can be removed. If this is a drive with no device backing
1330 * then we can just get rid of the block driver state right here.
1332 if (bdrv_get_attached_dev(bs)) {
1335 /* Further I/O must not pause the guest */
1336 bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT,
1337 BLOCKDEV_ON_ERROR_REPORT);
1339 drive_uninit(drive_get_by_blockdev(bs));
1345 void qmp_block_resize(const char *device, int64_t size, Error **errp)
1347 BlockDriverState *bs;
1350 bs = bdrv_find(device);
1352 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1357 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
1361 /* complete all in-flight operations before resizing the device */
1364 ret = bdrv_truncate(bs, size);
1369 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1372 error_set(errp, QERR_UNSUPPORTED);
1375 error_set(errp, QERR_DEVICE_IS_READ_ONLY, device);
1378 error_set(errp, QERR_DEVICE_IN_USE, device);
1381 error_setg_errno(errp, -ret, "Could not resize");
1386 static void block_job_cb(void *opaque, int ret)
1388 BlockDriverState *bs = opaque;
1391 trace_block_job_cb(bs, bs->job, ret);
1394 obj = qobject_from_block_job(bs->job);
1396 QDict *dict = qobject_to_qdict(obj);
1397 qdict_put(dict, "error", qstring_from_str(strerror(-ret)));
1400 if (block_job_is_cancelled(bs->job)) {
1401 monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj);
1403 monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj);
1405 qobject_decref(obj);
1407 drive_put_ref_bh_schedule(drive_get_by_blockdev(bs));
1410 void qmp_block_stream(const char *device, bool has_base,
1411 const char *base, bool has_speed, int64_t speed,
1412 bool has_on_error, BlockdevOnError on_error,
1415 BlockDriverState *bs;
1416 BlockDriverState *base_bs = NULL;
1417 Error *local_err = NULL;
1419 if (!has_on_error) {
1420 on_error = BLOCKDEV_ON_ERROR_REPORT;
1423 bs = bdrv_find(device);
1425 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1430 base_bs = bdrv_find_backing_image(bs, base);
1431 if (base_bs == NULL) {
1432 error_set(errp, QERR_BASE_NOT_FOUND, base);
1437 stream_start(bs, base_bs, base, has_speed ? speed : 0,
1438 on_error, block_job_cb, bs, &local_err);
1439 if (error_is_set(&local_err)) {
1440 error_propagate(errp, local_err);
1444 /* Grab a reference so hotplug does not delete the BlockDriverState from
1447 drive_get_ref(drive_get_by_blockdev(bs));
1449 trace_qmp_block_stream(bs, bs->job);
1452 void qmp_block_commit(const char *device,
1453 bool has_base, const char *base, const char *top,
1454 bool has_speed, int64_t speed,
1457 BlockDriverState *bs;
1458 BlockDriverState *base_bs, *top_bs;
1459 Error *local_err = NULL;
1460 /* This will be part of the QMP command, if/when the
1461 * BlockdevOnError change for blkmirror makes it in
1463 BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
1465 /* drain all i/o before commits */
1468 bs = bdrv_find(device);
1470 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1474 /* default top_bs is the active layer */
1478 if (strcmp(bs->filename, top) != 0) {
1479 top_bs = bdrv_find_backing_image(bs, top);
1483 if (top_bs == NULL) {
1484 error_setg(errp, "Top image file %s not found", top ? top : "NULL");
1488 if (has_base && base) {
1489 base_bs = bdrv_find_backing_image(top_bs, base);
1491 base_bs = bdrv_find_base(top_bs);
1494 if (base_bs == NULL) {
1495 error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
1499 commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs,
1501 if (local_err != NULL) {
1502 error_propagate(errp, local_err);
1505 /* Grab a reference so hotplug does not delete the BlockDriverState from
1508 drive_get_ref(drive_get_by_blockdev(bs));
1511 void qmp_drive_backup(const char *device, const char *target,
1512 bool has_format, const char *format,
1513 enum MirrorSyncMode sync,
1514 bool has_mode, enum NewImageMode mode,
1515 bool has_speed, int64_t speed,
1516 bool has_on_source_error, BlockdevOnError on_source_error,
1517 bool has_on_target_error, BlockdevOnError on_target_error,
1520 BlockDriverState *bs;
1521 BlockDriverState *target_bs;
1522 BlockDriverState *source = NULL;
1523 BlockDriver *drv = NULL;
1524 Error *local_err = NULL;
1532 if (!has_on_source_error) {
1533 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
1535 if (!has_on_target_error) {
1536 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
1539 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1542 bs = bdrv_find(device);
1544 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1548 if (!bdrv_is_inserted(bs)) {
1549 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1554 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
1557 drv = bdrv_find_format(format);
1559 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1564 if (bdrv_in_use(bs)) {
1565 error_set(errp, QERR_DEVICE_IN_USE, device);
1569 flags = bs->open_flags | BDRV_O_RDWR;
1571 /* See if we have a backing HD we can use to create our new image
1573 if (sync == MIRROR_SYNC_MODE_TOP) {
1574 source = bs->backing_hd;
1576 sync = MIRROR_SYNC_MODE_FULL;
1579 if (sync == MIRROR_SYNC_MODE_NONE) {
1583 size = bdrv_getlength(bs);
1585 error_setg_errno(errp, -size, "bdrv_getlength failed");
1589 if (mode != NEW_IMAGE_MODE_EXISTING) {
1590 assert(format && drv);
1592 bdrv_img_create(target, format, source->filename,
1593 source->drv->format_name, NULL,
1594 size, flags, &local_err, false);
1596 bdrv_img_create(target, format, NULL, NULL, NULL,
1597 size, flags, &local_err, false);
1601 if (error_is_set(&local_err)) {
1602 error_propagate(errp, local_err);
1606 target_bs = bdrv_new("");
1607 ret = bdrv_open(target_bs, target, NULL, flags, drv);
1609 bdrv_delete(target_bs);
1610 error_setg_file_open(errp, -ret, target);
1614 backup_start(bs, target_bs, speed, sync, on_source_error, on_target_error,
1615 block_job_cb, bs, &local_err);
1616 if (local_err != NULL) {
1617 bdrv_delete(target_bs);
1618 error_propagate(errp, local_err);
1622 /* Grab a reference so hotplug does not delete the BlockDriverState from
1625 drive_get_ref(drive_get_by_blockdev(bs));
1628 #define DEFAULT_MIRROR_BUF_SIZE (10 << 20)
1630 void qmp_drive_mirror(const char *device, const char *target,
1631 bool has_format, const char *format,
1632 enum MirrorSyncMode sync,
1633 bool has_mode, enum NewImageMode mode,
1634 bool has_speed, int64_t speed,
1635 bool has_granularity, uint32_t granularity,
1636 bool has_buf_size, int64_t buf_size,
1637 bool has_on_source_error, BlockdevOnError on_source_error,
1638 bool has_on_target_error, BlockdevOnError on_target_error,
1641 BlockDriverState *bs;
1642 BlockDriverState *source, *target_bs;
1643 BlockDriver *drv = NULL;
1644 Error *local_err = NULL;
1652 if (!has_on_source_error) {
1653 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
1655 if (!has_on_target_error) {
1656 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
1659 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1661 if (!has_granularity) {
1664 if (!has_buf_size) {
1665 buf_size = DEFAULT_MIRROR_BUF_SIZE;
1668 if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
1669 error_set(errp, QERR_INVALID_PARAMETER, device);
1672 if (granularity & (granularity - 1)) {
1673 error_set(errp, QERR_INVALID_PARAMETER, device);
1677 bs = bdrv_find(device);
1679 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1683 if (!bdrv_is_inserted(bs)) {
1684 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1689 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
1692 drv = bdrv_find_format(format);
1694 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1699 if (bdrv_in_use(bs)) {
1700 error_set(errp, QERR_DEVICE_IN_USE, device);
1704 flags = bs->open_flags | BDRV_O_RDWR;
1705 source = bs->backing_hd;
1706 if (!source && sync == MIRROR_SYNC_MODE_TOP) {
1707 sync = MIRROR_SYNC_MODE_FULL;
1710 size = bdrv_getlength(bs);
1712 error_setg_errno(errp, -size, "bdrv_getlength failed");
1716 if (sync == MIRROR_SYNC_MODE_FULL && mode != NEW_IMAGE_MODE_EXISTING) {
1717 /* create new image w/o backing file */
1718 assert(format && drv);
1719 bdrv_img_create(target, format,
1720 NULL, NULL, NULL, size, flags, &local_err, false);
1723 case NEW_IMAGE_MODE_EXISTING:
1726 case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
1727 /* create new image with backing file */
1728 bdrv_img_create(target, format,
1730 source->drv->format_name,
1731 NULL, size, flags, &local_err, false);
1738 if (error_is_set(&local_err)) {
1739 error_propagate(errp, local_err);
1743 /* Mirroring takes care of copy-on-write using the source's backing
1746 target_bs = bdrv_new("");
1747 ret = bdrv_open(target_bs, target, NULL, flags | BDRV_O_NO_BACKING, drv);
1749 bdrv_delete(target_bs);
1750 error_setg_file_open(errp, -ret, target);
1754 mirror_start(bs, target_bs, speed, granularity, buf_size, sync,
1755 on_source_error, on_target_error,
1756 block_job_cb, bs, &local_err);
1757 if (local_err != NULL) {
1758 bdrv_delete(target_bs);
1759 error_propagate(errp, local_err);
1763 /* Grab a reference so hotplug does not delete the BlockDriverState from
1766 drive_get_ref(drive_get_by_blockdev(bs));
1769 static BlockJob *find_block_job(const char *device)
1771 BlockDriverState *bs;
1773 bs = bdrv_find(device);
1774 if (!bs || !bs->job) {
1780 void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
1782 BlockJob *job = find_block_job(device);
1785 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1789 block_job_set_speed(job, speed, errp);
1792 void qmp_block_job_cancel(const char *device,
1793 bool has_force, bool force, Error **errp)
1795 BlockJob *job = find_block_job(device);
1802 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1805 if (job->paused && !force) {
1806 error_set(errp, QERR_BLOCK_JOB_PAUSED, device);
1810 trace_qmp_block_job_cancel(job);
1811 block_job_cancel(job);
1814 void qmp_block_job_pause(const char *device, Error **errp)
1816 BlockJob *job = find_block_job(device);
1819 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1823 trace_qmp_block_job_pause(job);
1824 block_job_pause(job);
1827 void qmp_block_job_resume(const char *device, Error **errp)
1829 BlockJob *job = find_block_job(device);
1832 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1836 trace_qmp_block_job_resume(job);
1837 block_job_resume(job);
1840 void qmp_block_job_complete(const char *device, Error **errp)
1842 BlockJob *job = find_block_job(device);
1845 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1849 trace_qmp_block_job_complete(job);
1850 block_job_complete(job, errp);
1853 static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs)
1855 BlockJobInfoList **prev = opaque;
1856 BlockJob *job = bs->job;
1859 BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
1860 elem->value = block_job_query(bs->job);
1861 (*prev)->next = elem;
1866 BlockJobInfoList *qmp_query_block_jobs(Error **errp)
1868 /* Dummy is a fake list element for holding the head pointer */
1869 BlockJobInfoList dummy = {};
1870 BlockJobInfoList *prev = &dummy;
1871 bdrv_iterate(do_qmp_query_block_jobs_one, &prev);
1875 QemuOptsList qemu_common_drive_opts = {
1877 .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
1881 .type = QEMU_OPT_NUMBER,
1882 .help = "bus number",
1885 .type = QEMU_OPT_NUMBER,
1886 .help = "unit number (i.e. lun for scsi)",
1889 .type = QEMU_OPT_STRING,
1890 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
1893 .type = QEMU_OPT_NUMBER,
1894 .help = "index number",
1897 .type = QEMU_OPT_NUMBER,
1898 .help = "number of cylinders (ide disk geometry)",
1901 .type = QEMU_OPT_NUMBER,
1902 .help = "number of heads (ide disk geometry)",
1905 .type = QEMU_OPT_NUMBER,
1906 .help = "number of sectors (ide disk geometry)",
1909 .type = QEMU_OPT_STRING,
1910 .help = "chs translation (auto, lba. none)",
1913 .type = QEMU_OPT_STRING,
1914 .help = "media type (disk, cdrom)",
1917 .type = QEMU_OPT_BOOL,
1918 .help = "enable/disable snapshot mode",
1921 .type = QEMU_OPT_STRING,
1922 .help = "disk image",
1925 .type = QEMU_OPT_STRING,
1926 .help = "discard operation (ignore/off, unmap/on)",
1928 .name = "cache.writeback",
1929 .type = QEMU_OPT_BOOL,
1930 .help = "enables writeback mode for any caches",
1932 .name = "cache.direct",
1933 .type = QEMU_OPT_BOOL,
1934 .help = "enables use of O_DIRECT (bypass the host page cache)",
1936 .name = "cache.no-flush",
1937 .type = QEMU_OPT_BOOL,
1938 .help = "ignore any flush requests for the device",
1941 .type = QEMU_OPT_STRING,
1942 .help = "host AIO implementation (threads, native)",
1945 .type = QEMU_OPT_STRING,
1946 .help = "disk format (raw, qcow2, ...)",
1949 .type = QEMU_OPT_STRING,
1950 .help = "disk serial number",
1953 .type = QEMU_OPT_STRING,
1954 .help = "read error action",
1957 .type = QEMU_OPT_STRING,
1958 .help = "write error action",
1961 .type = QEMU_OPT_STRING,
1962 .help = "pci address (virtio only)",
1964 .name = "read-only",
1965 .type = QEMU_OPT_BOOL,
1966 .help = "open drive file as read-only",
1968 .name = "throttling.iops-total",
1969 .type = QEMU_OPT_NUMBER,
1970 .help = "limit total I/O operations per second",
1972 .name = "throttling.iops-read",
1973 .type = QEMU_OPT_NUMBER,
1974 .help = "limit read operations per second",
1976 .name = "throttling.iops-write",
1977 .type = QEMU_OPT_NUMBER,
1978 .help = "limit write operations per second",
1980 .name = "throttling.bps-total",
1981 .type = QEMU_OPT_NUMBER,
1982 .help = "limit total bytes per second",
1984 .name = "throttling.bps-read",
1985 .type = QEMU_OPT_NUMBER,
1986 .help = "limit read bytes per second",
1988 .name = "throttling.bps-write",
1989 .type = QEMU_OPT_NUMBER,
1990 .help = "limit write bytes per second",
1992 .name = "copy-on-read",
1993 .type = QEMU_OPT_BOOL,
1994 .help = "copy read data from backing file into image file",
1997 .type = QEMU_OPT_BOOL,
1998 .help = "(deprecated, ignored)",
2000 { /* end of list */ }
2004 QemuOptsList qemu_old_drive_opts = {
2006 .head = QTAILQ_HEAD_INITIALIZER(qemu_old_drive_opts.head),
2010 .type = QEMU_OPT_NUMBER,
2011 .help = "bus number",
2014 .type = QEMU_OPT_NUMBER,
2015 .help = "unit number (i.e. lun for scsi)",
2018 .type = QEMU_OPT_STRING,
2019 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
2022 .type = QEMU_OPT_NUMBER,
2023 .help = "index number",
2026 .type = QEMU_OPT_NUMBER,
2027 .help = "number of cylinders (ide disk geometry)",
2030 .type = QEMU_OPT_NUMBER,
2031 .help = "number of heads (ide disk geometry)",
2034 .type = QEMU_OPT_NUMBER,
2035 .help = "number of sectors (ide disk geometry)",
2038 .type = QEMU_OPT_STRING,
2039 .help = "chs translation (auto, lba. none)",
2042 .type = QEMU_OPT_STRING,
2043 .help = "media type (disk, cdrom)",
2046 .type = QEMU_OPT_BOOL,
2047 .help = "enable/disable snapshot mode",
2050 .type = QEMU_OPT_STRING,
2051 .help = "disk image",
2054 .type = QEMU_OPT_STRING,
2055 .help = "discard operation (ignore/off, unmap/on)",
2058 .type = QEMU_OPT_STRING,
2059 .help = "host cache usage (none, writeback, writethrough, "
2060 "directsync, unsafe)",
2063 .type = QEMU_OPT_STRING,
2064 .help = "host AIO implementation (threads, native)",
2067 .type = QEMU_OPT_STRING,
2068 .help = "disk format (raw, qcow2, ...)",
2071 .type = QEMU_OPT_STRING,
2072 .help = "disk serial number",
2075 .type = QEMU_OPT_STRING,
2076 .help = "read error action",
2079 .type = QEMU_OPT_STRING,
2080 .help = "write error action",
2083 .type = QEMU_OPT_STRING,
2084 .help = "pci address (virtio only)",
2087 .type = QEMU_OPT_BOOL,
2088 .help = "open drive file as read-only",
2091 .type = QEMU_OPT_NUMBER,
2092 .help = "limit total I/O operations per second",
2095 .type = QEMU_OPT_NUMBER,
2096 .help = "limit read operations per second",
2099 .type = QEMU_OPT_NUMBER,
2100 .help = "limit write operations per second",
2103 .type = QEMU_OPT_NUMBER,
2104 .help = "limit total bytes per second",
2107 .type = QEMU_OPT_NUMBER,
2108 .help = "limit read bytes per second",
2111 .type = QEMU_OPT_NUMBER,
2112 .help = "limit write bytes per second",
2114 .name = "copy-on-read",
2115 .type = QEMU_OPT_BOOL,
2116 .help = "copy read data from backing file into image file",
2119 .type = QEMU_OPT_BOOL,
2120 .help = "(deprecated, ignored)",
2122 { /* end of list */ }
2126 QemuOptsList qemu_drive_opts = {
2128 .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
2131 * no elements => accept any params
2132 * validation will happen later
2134 { /* end of list */ }