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;
50 static const char *const if_name[IF_COUNT] = {
54 [IF_FLOPPY] = "floppy",
55 [IF_PFLASH] = "pflash",
58 [IF_VIRTIO] = "virtio",
62 static const int if_max_devs[IF_COUNT] = {
64 * Do not change these numbers! They govern how drive option
65 * index maps to unit and bus. That mapping is ABI.
67 * All controllers used to imlement if=T drives need to support
68 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
69 * Otherwise, some index values map to "impossible" bus, unit
72 * For instance, if you change [IF_SCSI] to 255, -drive
73 * if=scsi,index=12 no longer means bus=1,unit=5, but
74 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
75 * the drive can't be set up. Regression.
82 * We automatically delete the drive when a device using it gets
83 * unplugged. Questionable feature, but we can't just drop it.
84 * Device models call blockdev_mark_auto_del() to schedule the
85 * automatic deletion, and generic qdev code calls blockdev_auto_del()
86 * when deletion is actually safe.
88 void blockdev_mark_auto_del(BlockDriverState *bs)
90 DriveInfo *dinfo = drive_get_by_blockdev(bs);
93 block_job_cancel(bs->job);
100 void blockdev_auto_del(BlockDriverState *bs)
102 DriveInfo *dinfo = drive_get_by_blockdev(bs);
104 if (dinfo && dinfo->auto_del) {
105 drive_put_ref(dinfo);
109 static int drive_index_to_bus_id(BlockInterfaceType type, int index)
111 int max_devs = if_max_devs[type];
112 return max_devs ? index / max_devs : 0;
115 static int drive_index_to_unit_id(BlockInterfaceType type, int index)
117 int max_devs = if_max_devs[type];
118 return max_devs ? index % max_devs : index;
121 QemuOpts *drive_def(const char *optstr)
123 return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0);
126 QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
132 opts = drive_def(optstr);
136 if (type != IF_DEFAULT) {
137 qemu_opt_set(opts, "if", if_name[type]);
140 snprintf(buf, sizeof(buf), "%d", index);
141 qemu_opt_set(opts, "index", buf);
144 qemu_opt_set(opts, "file", file);
148 DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
152 /* seek interface, bus and unit */
154 QTAILQ_FOREACH(dinfo, &drives, next) {
155 if (dinfo->type == type &&
164 DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
166 return drive_get(type,
167 drive_index_to_bus_id(type, index),
168 drive_index_to_unit_id(type, index));
171 int drive_get_max_bus(BlockInterfaceType type)
177 QTAILQ_FOREACH(dinfo, &drives, next) {
178 if(dinfo->type == type &&
179 dinfo->bus > max_bus)
180 max_bus = dinfo->bus;
185 /* Get a block device. This should only be used for single-drive devices
186 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
188 DriveInfo *drive_get_next(BlockInterfaceType type)
190 static int next_block_unit[IF_COUNT];
192 return drive_get(type, 0, next_block_unit[type]++);
195 DriveInfo *drive_get_by_blockdev(BlockDriverState *bs)
199 QTAILQ_FOREACH(dinfo, &drives, next) {
200 if (dinfo->bdrv == bs) {
207 static void bdrv_format_print(void *opaque, const char *name)
209 error_printf(" %s", name);
212 static void drive_uninit(DriveInfo *dinfo)
214 qemu_opts_del(dinfo->opts);
215 bdrv_delete(dinfo->bdrv);
217 QTAILQ_REMOVE(&drives, dinfo, next);
218 g_free(dinfo->serial);
222 void drive_put_ref(DriveInfo *dinfo)
224 assert(dinfo->refcount);
225 if (--dinfo->refcount == 0) {
230 void drive_get_ref(DriveInfo *dinfo)
240 static void drive_put_ref_bh(void *opaque)
242 DrivePutRefBH *s = opaque;
244 drive_put_ref(s->dinfo);
245 qemu_bh_delete(s->bh);
250 * Release a drive reference in a BH
252 * It is not possible to use drive_put_ref() from a callback function when the
253 * callers still need the drive. In such cases we schedule a BH to release the
256 static void drive_put_ref_bh_schedule(DriveInfo *dinfo)
260 s = g_new(DrivePutRefBH, 1);
261 s->bh = qemu_bh_new(drive_put_ref_bh, s);
263 qemu_bh_schedule(s->bh);
266 static int parse_block_error_action(const char *buf, bool is_read)
268 if (!strcmp(buf, "ignore")) {
269 return BLOCKDEV_ON_ERROR_IGNORE;
270 } else if (!is_read && !strcmp(buf, "enospc")) {
271 return BLOCKDEV_ON_ERROR_ENOSPC;
272 } else if (!strcmp(buf, "stop")) {
273 return BLOCKDEV_ON_ERROR_STOP;
274 } else if (!strcmp(buf, "report")) {
275 return BLOCKDEV_ON_ERROR_REPORT;
277 error_report("'%s' invalid %s error action",
278 buf, is_read ? "read" : "write");
283 static bool do_check_io_limits(BlockIOLimit *io_limits, Error **errp)
290 bps_flag = (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] != 0)
291 && ((io_limits->bps[BLOCK_IO_LIMIT_READ] != 0)
292 || (io_limits->bps[BLOCK_IO_LIMIT_WRITE] != 0));
293 iops_flag = (io_limits->iops[BLOCK_IO_LIMIT_TOTAL] != 0)
294 && ((io_limits->iops[BLOCK_IO_LIMIT_READ] != 0)
295 || (io_limits->iops[BLOCK_IO_LIMIT_WRITE] != 0));
296 if (bps_flag || iops_flag) {
297 error_setg(errp, "bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) "
298 "cannot be used at the same time");
302 if (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] < 0 ||
303 io_limits->bps[BLOCK_IO_LIMIT_WRITE] < 0 ||
304 io_limits->bps[BLOCK_IO_LIMIT_READ] < 0 ||
305 io_limits->iops[BLOCK_IO_LIMIT_TOTAL] < 0 ||
306 io_limits->iops[BLOCK_IO_LIMIT_WRITE] < 0 ||
307 io_limits->iops[BLOCK_IO_LIMIT_READ] < 0) {
308 error_setg(errp, "bps and iops values must be 0 or greater");
315 static DriveInfo *blockdev_init(QemuOpts *all_opts,
316 BlockInterfaceType block_default_type)
319 const char *file = NULL;
321 const char *mediastr = "";
322 BlockInterfaceType type;
323 enum { MEDIA_DISK, MEDIA_CDROM } media;
325 int cyls, heads, secs, translation;
330 int on_read_error, on_write_error;
333 BlockIOLimit io_limits;
341 bool has_driver_specific_opts;
342 BlockDriver *drv = NULL;
344 translation = BIOS_ATA_TRANSLATION_AUTO;
347 /* Check common options by copying from all_opts to opts, all other options
348 * are stored in bs_opts. */
349 id = qemu_opts_id(all_opts);
350 opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
351 if (error_is_set(&error)) {
352 qerror_report_err(error);
357 bs_opts = qdict_new();
358 qemu_opts_to_qdict(all_opts, bs_opts);
359 qemu_opts_absorb_qdict(opts, bs_opts, &error);
360 if (error_is_set(&error)) {
361 qerror_report_err(error);
367 qdict_del(bs_opts, "id");
370 has_driver_specific_opts = !!qdict_size(bs_opts);
372 /* extract parameters */
373 bus_id = qemu_opt_get_number(opts, "bus", 0);
374 unit_id = qemu_opt_get_number(opts, "unit", -1);
375 index = qemu_opt_get_number(opts, "index", -1);
377 cyls = qemu_opt_get_number(opts, "cyls", 0);
378 heads = qemu_opt_get_number(opts, "heads", 0);
379 secs = qemu_opt_get_number(opts, "secs", 0);
381 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
382 ro = qemu_opt_get_bool(opts, "read-only", 0);
383 copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false);
385 file = qemu_opt_get(opts, "file");
386 serial = qemu_opt_get(opts, "serial");
388 if ((buf = qemu_opt_get(opts, "if")) != NULL) {
389 for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++)
391 if (type == IF_COUNT) {
392 error_report("unsupported bus type '%s'", buf);
396 type = block_default_type;
399 max_devs = if_max_devs[type];
401 if (cyls || heads || secs) {
403 error_report("invalid physical cyls number");
407 error_report("invalid physical heads number");
411 error_report("invalid physical secs number");
416 if ((buf = qemu_opt_get(opts, "trans")) != NULL) {
418 error_report("'%s' trans must be used with cyls, heads and secs",
422 if (!strcmp(buf, "none"))
423 translation = BIOS_ATA_TRANSLATION_NONE;
424 else if (!strcmp(buf, "lba"))
425 translation = BIOS_ATA_TRANSLATION_LBA;
426 else if (!strcmp(buf, "auto"))
427 translation = BIOS_ATA_TRANSLATION_AUTO;
429 error_report("'%s' invalid translation type", buf);
434 if ((buf = qemu_opt_get(opts, "media")) != NULL) {
435 if (!strcmp(buf, "disk")) {
437 } else if (!strcmp(buf, "cdrom")) {
438 if (cyls || secs || heads) {
439 error_report("CHS can't be set with media=%s", buf);
444 error_report("'%s' invalid media", buf);
449 if ((buf = qemu_opt_get(opts, "discard")) != NULL) {
450 if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) {
451 error_report("invalid discard option");
456 if (qemu_opt_get_bool(opts, "cache.writeback", true)) {
457 bdrv_flags |= BDRV_O_CACHE_WB;
459 if (qemu_opt_get_bool(opts, "cache.direct", false)) {
460 bdrv_flags |= BDRV_O_NOCACHE;
462 if (qemu_opt_get_bool(opts, "cache.no-flush", true)) {
463 bdrv_flags |= BDRV_O_NO_FLUSH;
466 #ifdef CONFIG_LINUX_AIO
467 if ((buf = qemu_opt_get(opts, "aio")) != NULL) {
468 if (!strcmp(buf, "native")) {
469 bdrv_flags |= BDRV_O_NATIVE_AIO;
470 } else if (!strcmp(buf, "threads")) {
471 /* this is the default */
473 error_report("invalid aio option");
479 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
480 if (is_help_option(buf)) {
481 error_printf("Supported formats:");
482 bdrv_iterate_format(bdrv_format_print, NULL);
487 drv = bdrv_find_whitelisted_format(buf, ro);
489 if (!ro && bdrv_find_whitelisted_format(buf, !ro)) {
490 error_report("'%s' can be only used as read-only device.", buf);
492 error_report("'%s' invalid format", buf);
498 /* disk I/O throttling */
499 io_limits.bps[BLOCK_IO_LIMIT_TOTAL] =
500 qemu_opt_get_number(opts, "throttling.bps-total", 0);
501 io_limits.bps[BLOCK_IO_LIMIT_READ] =
502 qemu_opt_get_number(opts, "throttling.bps-read", 0);
503 io_limits.bps[BLOCK_IO_LIMIT_WRITE] =
504 qemu_opt_get_number(opts, "throttling.bps-write", 0);
505 io_limits.iops[BLOCK_IO_LIMIT_TOTAL] =
506 qemu_opt_get_number(opts, "throttling.iops-total", 0);
507 io_limits.iops[BLOCK_IO_LIMIT_READ] =
508 qemu_opt_get_number(opts, "throttling.iops-read", 0);
509 io_limits.iops[BLOCK_IO_LIMIT_WRITE] =
510 qemu_opt_get_number(opts, "throttling.iops-write", 0);
512 if (!do_check_io_limits(&io_limits, &error)) {
513 error_report("%s", error_get_pretty(error));
518 if (qemu_opt_get(opts, "boot") != NULL) {
519 fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
520 "ignored. Future versions will reject this parameter. Please "
521 "update your scripts.\n");
524 on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
525 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
526 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
527 error_report("werror is not supported by this bus type");
531 on_write_error = parse_block_error_action(buf, 0);
532 if (on_write_error < 0) {
537 on_read_error = BLOCKDEV_ON_ERROR_REPORT;
538 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
539 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
540 error_report("rerror is not supported by this bus type");
544 on_read_error = parse_block_error_action(buf, 1);
545 if (on_read_error < 0) {
550 if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) {
551 if (type != IF_VIRTIO) {
552 error_report("addr is not supported by this bus type");
557 /* compute bus and unit according index */
560 if (bus_id != 0 || unit_id != -1) {
561 error_report("index cannot be used with bus and unit");
564 bus_id = drive_index_to_bus_id(type, index);
565 unit_id = drive_index_to_unit_id(type, index);
568 /* if user doesn't specify a unit_id,
569 * try to find the first free
574 while (drive_get(type, bus_id, unit_id) != NULL) {
576 if (max_devs && unit_id >= max_devs) {
585 if (max_devs && unit_id >= max_devs) {
586 error_report("unit %d too big (max is %d)",
587 unit_id, max_devs - 1);
592 * catch multiple definitions
595 if (drive_get(type, bus_id, unit_id) != NULL) {
596 error_report("drive with bus=%d, unit=%d (index=%d) exists",
597 bus_id, unit_id, index);
603 dinfo = g_malloc0(sizeof(*dinfo));
604 if ((buf = qemu_opts_id(opts)) != NULL) {
605 dinfo->id = g_strdup(buf);
607 /* no id supplied -> create one */
608 dinfo->id = g_malloc0(32);
609 if (type == IF_IDE || type == IF_SCSI)
610 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
612 snprintf(dinfo->id, 32, "%s%i%s%i",
613 if_name[type], bus_id, mediastr, unit_id);
615 snprintf(dinfo->id, 32, "%s%s%i",
616 if_name[type], mediastr, unit_id);
618 dinfo->bdrv = bdrv_new(dinfo->id);
619 dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
620 dinfo->bdrv->read_only = ro;
621 dinfo->devaddr = devaddr;
624 dinfo->unit = unit_id;
626 dinfo->heads = heads;
628 dinfo->trans = translation;
629 dinfo->opts = all_opts;
631 if (serial != NULL) {
632 dinfo->serial = g_strdup(serial);
634 QTAILQ_INSERT_TAIL(&drives, dinfo, next);
636 bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error);
638 /* disk I/O throttling */
639 bdrv_set_io_limits(dinfo->bdrv, &io_limits);
646 dinfo->media_cd = media == MEDIA_CDROM;
655 /* add virtio block device */
657 devopts = qemu_opts_create_nofail(qemu_find_opts("device"));
658 if (arch_type == QEMU_ARCH_S390X) {
659 qemu_opt_set(devopts, "driver", "virtio-blk-s390");
661 qemu_opt_set(devopts, "driver", "virtio-blk-pci");
663 qemu_opt_set(devopts, "drive", dinfo->id);
665 qemu_opt_set(devopts, "addr", devaddr);
671 if (!file || !*file) {
672 if (has_driver_specific_opts) {
679 /* always use cache=unsafe with snapshot */
680 bdrv_flags &= ~BDRV_O_CACHE_MASK;
681 bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
685 bdrv_flags |= BDRV_O_COPY_ON_READ;
688 if (runstate_check(RUN_STATE_INMIGRATE)) {
689 bdrv_flags |= BDRV_O_INCOMING;
692 if (media == MEDIA_CDROM) {
693 /* CDROM is fine for any interface, don't check. */
695 } else if (ro == 1) {
696 if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY &&
697 type != IF_NONE && type != IF_PFLASH) {
698 error_report("read-only not supported by this bus type");
703 bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
705 if (ro && copy_on_read) {
706 error_report("warning: disabling copy_on_read on read-only drive");
710 ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, drv);
713 if (ret == -EMEDIUMTYPE) {
714 error_report("could not open disk image %s: not in %s format",
715 file ?: dinfo->id, drv ? drv->format_name :
716 qdict_get_str(bs_opts, "driver"));
718 error_report("could not open disk image %s: %s",
719 file ?: dinfo->id, strerror(-ret));
724 if (bdrv_key_required(dinfo->bdrv))
735 bdrv_delete(dinfo->bdrv);
737 QTAILQ_REMOVE(&drives, dinfo, next);
742 static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to)
746 value = qemu_opt_get(opts, from);
748 qemu_opt_set(opts, to, value);
749 qemu_opt_unset(opts, from);
753 DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)
757 /* Change legacy command line options into QMP ones */
758 qemu_opt_rename(all_opts, "iops", "throttling.iops-total");
759 qemu_opt_rename(all_opts, "iops_rd", "throttling.iops-read");
760 qemu_opt_rename(all_opts, "iops_wr", "throttling.iops-write");
762 qemu_opt_rename(all_opts, "bps", "throttling.bps-total");
763 qemu_opt_rename(all_opts, "bps_rd", "throttling.bps-read");
764 qemu_opt_rename(all_opts, "bps_wr", "throttling.bps-write");
766 qemu_opt_rename(all_opts, "readonly", "read-only");
768 value = qemu_opt_get(all_opts, "cache");
772 if (bdrv_parse_cache_flags(value, &flags) != 0) {
773 error_report("invalid cache option");
777 /* Specific options take precedence */
778 if (!qemu_opt_get(all_opts, "cache.writeback")) {
779 qemu_opt_set_bool(all_opts, "cache.writeback",
780 !!(flags & BDRV_O_CACHE_WB));
782 if (!qemu_opt_get(all_opts, "cache.direct")) {
783 qemu_opt_set_bool(all_opts, "cache.direct",
784 !!(flags & BDRV_O_NOCACHE));
786 if (!qemu_opt_get(all_opts, "cache.no-flush")) {
787 qemu_opt_set_bool(all_opts, "cache.no-flush",
788 !!(flags & BDRV_O_NO_FLUSH));
790 qemu_opt_unset(all_opts, "cache");
793 return blockdev_init(all_opts, block_default_type);
796 void do_commit(Monitor *mon, const QDict *qdict)
798 const char *device = qdict_get_str(qdict, "device");
799 BlockDriverState *bs;
802 if (!strcmp(device, "all")) {
803 ret = bdrv_commit_all();
805 bs = bdrv_find(device);
807 monitor_printf(mon, "Device '%s' not found\n", device);
810 ret = bdrv_commit(bs);
813 monitor_printf(mon, "'commit' error for '%s': %s\n", device,
818 static void blockdev_do_action(int kind, void *data, Error **errp)
820 TransactionAction action;
821 TransactionActionList list;
825 list.value = &action;
827 qmp_transaction(&list, errp);
830 void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file,
831 bool has_format, const char *format,
832 bool has_mode, enum NewImageMode mode,
835 BlockdevSnapshot snapshot = {
836 .device = (char *) device,
837 .snapshot_file = (char *) snapshot_file,
838 .has_format = has_format,
839 .format = (char *) format,
840 .has_mode = has_mode,
843 blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
848 /* New and old BlockDriverState structs for group snapshots */
850 typedef struct BlkTransactionState BlkTransactionState;
852 /* Only prepare() may fail. In a single transaction, only one of commit() or
853 abort() will be called, clean() will always be called if it present. */
854 typedef struct BdrvActionOps {
855 /* Size of state struct, in bytes. */
856 size_t instance_size;
857 /* Prepare the work, must NOT be NULL. */
858 void (*prepare)(BlkTransactionState *common, Error **errp);
859 /* Commit the changes, can be NULL. */
860 void (*commit)(BlkTransactionState *common);
861 /* Abort the changes on fail, can be NULL. */
862 void (*abort)(BlkTransactionState *common);
863 /* Clean up resource in the end, can be NULL. */
864 void (*clean)(BlkTransactionState *common);
868 * This structure must be arranged as first member in child type, assuming
869 * that compiler will also arrange it to the same address with parent instance.
870 * Later it will be used in free().
872 struct BlkTransactionState {
873 TransactionAction *action;
874 const BdrvActionOps *ops;
875 QSIMPLEQ_ENTRY(BlkTransactionState) entry;
878 /* external snapshot private data */
879 typedef struct ExternalSnapshotState {
880 BlkTransactionState common;
881 BlockDriverState *old_bs;
882 BlockDriverState *new_bs;
883 } ExternalSnapshotState;
885 static void external_snapshot_prepare(BlkTransactionState *common,
890 Error *local_err = NULL;
892 const char *new_image_file;
893 const char *format = "qcow2";
894 enum NewImageMode mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
895 ExternalSnapshotState *state =
896 DO_UPCAST(ExternalSnapshotState, common, common);
897 TransactionAction *action = common->action;
900 g_assert(action->kind == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC);
902 device = action->blockdev_snapshot_sync->device;
903 new_image_file = action->blockdev_snapshot_sync->snapshot_file;
904 if (action->blockdev_snapshot_sync->has_format) {
905 format = action->blockdev_snapshot_sync->format;
907 if (action->blockdev_snapshot_sync->has_mode) {
908 mode = action->blockdev_snapshot_sync->mode;
911 /* start processing */
912 drv = bdrv_find_format(format);
914 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
918 state->old_bs = bdrv_find(device);
919 if (!state->old_bs) {
920 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
924 if (!bdrv_is_inserted(state->old_bs)) {
925 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
929 if (bdrv_in_use(state->old_bs)) {
930 error_set(errp, QERR_DEVICE_IN_USE, device);
934 if (!bdrv_is_read_only(state->old_bs)) {
935 if (bdrv_flush(state->old_bs)) {
936 error_set(errp, QERR_IO_ERROR);
941 flags = state->old_bs->open_flags;
943 /* create new image w/backing file */
944 if (mode != NEW_IMAGE_MODE_EXISTING) {
945 bdrv_img_create(new_image_file, format,
946 state->old_bs->filename,
947 state->old_bs->drv->format_name,
948 NULL, -1, flags, &local_err, false);
949 if (error_is_set(&local_err)) {
950 error_propagate(errp, local_err);
955 /* We will manually add the backing_hd field to the bs later */
956 state->new_bs = bdrv_new("");
957 /* TODO Inherit bs->options or only take explicit options with an
958 * extended QMP command? */
959 ret = bdrv_open(state->new_bs, new_image_file, NULL,
960 flags | BDRV_O_NO_BACKING, drv);
962 error_setg_file_open(errp, -ret, new_image_file);
966 static void external_snapshot_commit(BlkTransactionState *common)
968 ExternalSnapshotState *state =
969 DO_UPCAST(ExternalSnapshotState, common, common);
971 /* This removes our old bs and adds the new bs */
972 bdrv_append(state->new_bs, state->old_bs);
973 /* We don't need (or want) to use the transactional
974 * bdrv_reopen_multiple() across all the entries at once, because we
975 * don't want to abort all of them if one of them fails the reopen */
976 bdrv_reopen(state->new_bs, state->new_bs->open_flags & ~BDRV_O_RDWR,
980 static void external_snapshot_abort(BlkTransactionState *common)
982 ExternalSnapshotState *state =
983 DO_UPCAST(ExternalSnapshotState, common, common);
985 bdrv_delete(state->new_bs);
989 typedef struct DriveBackupState {
990 BlkTransactionState common;
991 BlockDriverState *bs;
995 static void drive_backup_prepare(BlkTransactionState *common, Error **errp)
997 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
999 Error *local_err = NULL;
1001 assert(common->action->kind == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
1002 backup = common->action->drive_backup;
1004 qmp_drive_backup(backup->device, backup->target,
1005 backup->has_format, backup->format,
1007 backup->has_mode, backup->mode,
1008 backup->has_speed, backup->speed,
1009 backup->has_on_source_error, backup->on_source_error,
1010 backup->has_on_target_error, backup->on_target_error,
1012 if (error_is_set(&local_err)) {
1013 error_propagate(errp, local_err);
1019 state->bs = bdrv_find(backup->device);
1020 state->job = state->bs->job;
1023 static void drive_backup_abort(BlkTransactionState *common)
1025 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1026 BlockDriverState *bs = state->bs;
1028 /* Only cancel if it's the job we started */
1029 if (bs && bs->job && bs->job == state->job) {
1030 block_job_cancel_sync(bs->job);
1034 static void abort_prepare(BlkTransactionState *common, Error **errp)
1036 error_setg(errp, "Transaction aborted using Abort action");
1039 static void abort_commit(BlkTransactionState *common)
1041 g_assert_not_reached(); /* this action never succeeds */
1044 static const BdrvActionOps actions[] = {
1045 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
1046 .instance_size = sizeof(ExternalSnapshotState),
1047 .prepare = external_snapshot_prepare,
1048 .commit = external_snapshot_commit,
1049 .abort = external_snapshot_abort,
1051 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
1052 .instance_size = sizeof(DriveBackupState),
1053 .prepare = drive_backup_prepare,
1054 .abort = drive_backup_abort,
1056 [TRANSACTION_ACTION_KIND_ABORT] = {
1057 .instance_size = sizeof(BlkTransactionState),
1058 .prepare = abort_prepare,
1059 .commit = abort_commit,
1064 * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
1065 * then we do not pivot any of the devices in the group, and abandon the
1068 void qmp_transaction(TransactionActionList *dev_list, Error **errp)
1070 TransactionActionList *dev_entry = dev_list;
1071 BlkTransactionState *state, *next;
1072 Error *local_err = NULL;
1074 QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionState) snap_bdrv_states;
1075 QSIMPLEQ_INIT(&snap_bdrv_states);
1077 /* drain all i/o before any snapshots */
1080 /* We don't do anything in this loop that commits us to the snapshot */
1081 while (NULL != dev_entry) {
1082 TransactionAction *dev_info = NULL;
1083 const BdrvActionOps *ops;
1085 dev_info = dev_entry->value;
1086 dev_entry = dev_entry->next;
1088 assert(dev_info->kind < ARRAY_SIZE(actions));
1090 ops = &actions[dev_info->kind];
1091 state = g_malloc0(ops->instance_size);
1093 state->action = dev_info;
1094 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
1096 state->ops->prepare(state, &local_err);
1097 if (error_is_set(&local_err)) {
1098 error_propagate(errp, local_err);
1099 goto delete_and_fail;
1103 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
1104 if (state->ops->commit) {
1105 state->ops->commit(state);
1114 * failure, and it is all-or-none; abandon each new bs, and keep using
1115 * the original bs for all images
1117 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
1118 if (state->ops->abort) {
1119 state->ops->abort(state);
1123 QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
1124 if (state->ops->clean) {
1125 state->ops->clean(state);
1132 static void eject_device(BlockDriverState *bs, int force, Error **errp)
1134 if (bdrv_in_use(bs)) {
1135 error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs));
1138 if (!bdrv_dev_has_removable_media(bs)) {
1139 error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs));
1143 if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) {
1144 bdrv_dev_eject_request(bs, force);
1146 error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs));
1154 void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
1156 BlockDriverState *bs;
1158 bs = bdrv_find(device);
1160 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1164 eject_device(bs, force, errp);
1167 void qmp_block_passwd(const char *device, const char *password, Error **errp)
1169 BlockDriverState *bs;
1172 bs = bdrv_find(device);
1174 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1178 err = bdrv_set_key(bs, password);
1179 if (err == -EINVAL) {
1180 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
1182 } else if (err < 0) {
1183 error_set(errp, QERR_INVALID_PASSWORD);
1188 static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename,
1189 int bdrv_flags, BlockDriver *drv,
1190 const char *password, Error **errp)
1194 ret = bdrv_open(bs, filename, NULL, bdrv_flags, drv);
1196 error_setg_file_open(errp, -ret, filename);
1200 if (bdrv_key_required(bs)) {
1202 if (bdrv_set_key(bs, password) < 0) {
1203 error_set(errp, QERR_INVALID_PASSWORD);
1206 error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs),
1207 bdrv_get_encrypted_filename(bs));
1209 } else if (password) {
1210 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
1214 void qmp_change_blockdev(const char *device, const char *filename,
1215 bool has_format, const char *format, Error **errp)
1217 BlockDriverState *bs;
1218 BlockDriver *drv = NULL;
1222 bs = bdrv_find(device);
1224 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1229 drv = bdrv_find_whitelisted_format(format, bs->read_only);
1231 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1236 eject_device(bs, 0, &err);
1237 if (error_is_set(&err)) {
1238 error_propagate(errp, err);
1242 bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
1243 bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
1245 qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
1248 /* throttling disk I/O limits */
1249 void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
1250 int64_t bps_wr, int64_t iops, int64_t iops_rd,
1251 int64_t iops_wr, Error **errp)
1253 BlockIOLimit io_limits;
1254 BlockDriverState *bs;
1256 bs = bdrv_find(device);
1258 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1262 io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = bps;
1263 io_limits.bps[BLOCK_IO_LIMIT_READ] = bps_rd;
1264 io_limits.bps[BLOCK_IO_LIMIT_WRITE] = bps_wr;
1265 io_limits.iops[BLOCK_IO_LIMIT_TOTAL]= iops;
1266 io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd;
1267 io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr;
1269 if (!do_check_io_limits(&io_limits, errp)) {
1273 bs->io_limits = io_limits;
1275 if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) {
1276 bdrv_io_limits_enable(bs);
1277 } else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) {
1278 bdrv_io_limits_disable(bs);
1280 if (bs->block_timer) {
1281 timer_mod(bs->block_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
1286 int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
1288 const char *id = qdict_get_str(qdict, "id");
1289 BlockDriverState *bs;
1293 qerror_report(QERR_DEVICE_NOT_FOUND, id);
1296 if (bdrv_in_use(bs)) {
1297 qerror_report(QERR_DEVICE_IN_USE, id);
1301 /* quiesce block driver; prevent further io */
1306 /* if we have a device attached to this BlockDriverState
1307 * then we need to make the drive anonymous until the device
1308 * can be removed. If this is a drive with no device backing
1309 * then we can just get rid of the block driver state right here.
1311 if (bdrv_get_attached_dev(bs)) {
1314 /* Further I/O must not pause the guest */
1315 bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT,
1316 BLOCKDEV_ON_ERROR_REPORT);
1318 drive_uninit(drive_get_by_blockdev(bs));
1324 void qmp_block_resize(const char *device, int64_t size, Error **errp)
1326 BlockDriverState *bs;
1329 bs = bdrv_find(device);
1331 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1336 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
1340 /* complete all in-flight operations before resizing the device */
1343 ret = bdrv_truncate(bs, size);
1348 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1351 error_set(errp, QERR_UNSUPPORTED);
1354 error_set(errp, QERR_DEVICE_IS_READ_ONLY, device);
1357 error_set(errp, QERR_DEVICE_IN_USE, device);
1360 error_setg_errno(errp, -ret, "Could not resize");
1365 static void block_job_cb(void *opaque, int ret)
1367 BlockDriverState *bs = opaque;
1370 trace_block_job_cb(bs, bs->job, ret);
1373 obj = qobject_from_block_job(bs->job);
1375 QDict *dict = qobject_to_qdict(obj);
1376 qdict_put(dict, "error", qstring_from_str(strerror(-ret)));
1379 if (block_job_is_cancelled(bs->job)) {
1380 monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj);
1382 monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj);
1384 qobject_decref(obj);
1386 drive_put_ref_bh_schedule(drive_get_by_blockdev(bs));
1389 void qmp_block_stream(const char *device, bool has_base,
1390 const char *base, bool has_speed, int64_t speed,
1391 bool has_on_error, BlockdevOnError on_error,
1394 BlockDriverState *bs;
1395 BlockDriverState *base_bs = NULL;
1396 Error *local_err = NULL;
1398 if (!has_on_error) {
1399 on_error = BLOCKDEV_ON_ERROR_REPORT;
1402 bs = bdrv_find(device);
1404 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1409 base_bs = bdrv_find_backing_image(bs, base);
1410 if (base_bs == NULL) {
1411 error_set(errp, QERR_BASE_NOT_FOUND, base);
1416 stream_start(bs, base_bs, base, has_speed ? speed : 0,
1417 on_error, block_job_cb, bs, &local_err);
1418 if (error_is_set(&local_err)) {
1419 error_propagate(errp, local_err);
1423 /* Grab a reference so hotplug does not delete the BlockDriverState from
1426 drive_get_ref(drive_get_by_blockdev(bs));
1428 trace_qmp_block_stream(bs, bs->job);
1431 void qmp_block_commit(const char *device,
1432 bool has_base, const char *base, const char *top,
1433 bool has_speed, int64_t speed,
1436 BlockDriverState *bs;
1437 BlockDriverState *base_bs, *top_bs;
1438 Error *local_err = NULL;
1439 /* This will be part of the QMP command, if/when the
1440 * BlockdevOnError change for blkmirror makes it in
1442 BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
1444 /* drain all i/o before commits */
1447 bs = bdrv_find(device);
1449 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1453 /* default top_bs is the active layer */
1457 if (strcmp(bs->filename, top) != 0) {
1458 top_bs = bdrv_find_backing_image(bs, top);
1462 if (top_bs == NULL) {
1463 error_setg(errp, "Top image file %s not found", top ? top : "NULL");
1467 if (has_base && base) {
1468 base_bs = bdrv_find_backing_image(top_bs, base);
1470 base_bs = bdrv_find_base(top_bs);
1473 if (base_bs == NULL) {
1474 error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
1478 commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs,
1480 if (local_err != NULL) {
1481 error_propagate(errp, local_err);
1484 /* Grab a reference so hotplug does not delete the BlockDriverState from
1487 drive_get_ref(drive_get_by_blockdev(bs));
1490 void qmp_drive_backup(const char *device, const char *target,
1491 bool has_format, const char *format,
1492 enum MirrorSyncMode sync,
1493 bool has_mode, enum NewImageMode mode,
1494 bool has_speed, int64_t speed,
1495 bool has_on_source_error, BlockdevOnError on_source_error,
1496 bool has_on_target_error, BlockdevOnError on_target_error,
1499 BlockDriverState *bs;
1500 BlockDriverState *target_bs;
1501 BlockDriverState *source = NULL;
1502 BlockDriver *drv = NULL;
1503 Error *local_err = NULL;
1511 if (!has_on_source_error) {
1512 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
1514 if (!has_on_target_error) {
1515 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
1518 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1521 bs = bdrv_find(device);
1523 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1527 if (!bdrv_is_inserted(bs)) {
1528 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1533 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
1536 drv = bdrv_find_format(format);
1538 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1543 if (bdrv_in_use(bs)) {
1544 error_set(errp, QERR_DEVICE_IN_USE, device);
1548 flags = bs->open_flags | BDRV_O_RDWR;
1550 /* See if we have a backing HD we can use to create our new image
1552 if (sync == MIRROR_SYNC_MODE_TOP) {
1553 source = bs->backing_hd;
1555 sync = MIRROR_SYNC_MODE_FULL;
1558 if (sync == MIRROR_SYNC_MODE_NONE) {
1562 size = bdrv_getlength(bs);
1564 error_setg_errno(errp, -size, "bdrv_getlength failed");
1568 if (mode != NEW_IMAGE_MODE_EXISTING) {
1569 assert(format && drv);
1571 bdrv_img_create(target, format, source->filename,
1572 source->drv->format_name, NULL,
1573 size, flags, &local_err, false);
1575 bdrv_img_create(target, format, NULL, NULL, NULL,
1576 size, flags, &local_err, false);
1580 if (error_is_set(&local_err)) {
1581 error_propagate(errp, local_err);
1585 target_bs = bdrv_new("");
1586 ret = bdrv_open(target_bs, target, NULL, flags, drv);
1588 bdrv_delete(target_bs);
1589 error_setg_file_open(errp, -ret, target);
1593 backup_start(bs, target_bs, speed, sync, on_source_error, on_target_error,
1594 block_job_cb, bs, &local_err);
1595 if (local_err != NULL) {
1596 bdrv_delete(target_bs);
1597 error_propagate(errp, local_err);
1601 /* Grab a reference so hotplug does not delete the BlockDriverState from
1604 drive_get_ref(drive_get_by_blockdev(bs));
1607 #define DEFAULT_MIRROR_BUF_SIZE (10 << 20)
1609 void qmp_drive_mirror(const char *device, const char *target,
1610 bool has_format, const char *format,
1611 enum MirrorSyncMode sync,
1612 bool has_mode, enum NewImageMode mode,
1613 bool has_speed, int64_t speed,
1614 bool has_granularity, uint32_t granularity,
1615 bool has_buf_size, int64_t buf_size,
1616 bool has_on_source_error, BlockdevOnError on_source_error,
1617 bool has_on_target_error, BlockdevOnError on_target_error,
1620 BlockDriverState *bs;
1621 BlockDriverState *source, *target_bs;
1622 BlockDriver *drv = NULL;
1623 Error *local_err = NULL;
1631 if (!has_on_source_error) {
1632 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
1634 if (!has_on_target_error) {
1635 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
1638 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1640 if (!has_granularity) {
1643 if (!has_buf_size) {
1644 buf_size = DEFAULT_MIRROR_BUF_SIZE;
1647 if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
1648 error_set(errp, QERR_INVALID_PARAMETER, device);
1651 if (granularity & (granularity - 1)) {
1652 error_set(errp, QERR_INVALID_PARAMETER, device);
1656 bs = bdrv_find(device);
1658 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1662 if (!bdrv_is_inserted(bs)) {
1663 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1668 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
1671 drv = bdrv_find_format(format);
1673 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1678 if (bdrv_in_use(bs)) {
1679 error_set(errp, QERR_DEVICE_IN_USE, device);
1683 flags = bs->open_flags | BDRV_O_RDWR;
1684 source = bs->backing_hd;
1685 if (!source && sync == MIRROR_SYNC_MODE_TOP) {
1686 sync = MIRROR_SYNC_MODE_FULL;
1689 size = bdrv_getlength(bs);
1691 error_setg_errno(errp, -size, "bdrv_getlength failed");
1695 if (sync == MIRROR_SYNC_MODE_FULL && mode != NEW_IMAGE_MODE_EXISTING) {
1696 /* create new image w/o backing file */
1697 assert(format && drv);
1698 bdrv_img_create(target, format,
1699 NULL, NULL, NULL, size, flags, &local_err, false);
1702 case NEW_IMAGE_MODE_EXISTING:
1705 case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
1706 /* create new image with backing file */
1707 bdrv_img_create(target, format,
1709 source->drv->format_name,
1710 NULL, size, flags, &local_err, false);
1717 if (error_is_set(&local_err)) {
1718 error_propagate(errp, local_err);
1722 /* Mirroring takes care of copy-on-write using the source's backing
1725 target_bs = bdrv_new("");
1726 ret = bdrv_open(target_bs, target, NULL, flags | BDRV_O_NO_BACKING, drv);
1728 bdrv_delete(target_bs);
1729 error_setg_file_open(errp, -ret, target);
1733 mirror_start(bs, target_bs, speed, granularity, buf_size, sync,
1734 on_source_error, on_target_error,
1735 block_job_cb, bs, &local_err);
1736 if (local_err != NULL) {
1737 bdrv_delete(target_bs);
1738 error_propagate(errp, local_err);
1742 /* Grab a reference so hotplug does not delete the BlockDriverState from
1745 drive_get_ref(drive_get_by_blockdev(bs));
1748 static BlockJob *find_block_job(const char *device)
1750 BlockDriverState *bs;
1752 bs = bdrv_find(device);
1753 if (!bs || !bs->job) {
1759 void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
1761 BlockJob *job = find_block_job(device);
1764 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1768 block_job_set_speed(job, speed, errp);
1771 void qmp_block_job_cancel(const char *device,
1772 bool has_force, bool force, Error **errp)
1774 BlockJob *job = find_block_job(device);
1781 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1784 if (job->paused && !force) {
1785 error_set(errp, QERR_BLOCK_JOB_PAUSED, device);
1789 trace_qmp_block_job_cancel(job);
1790 block_job_cancel(job);
1793 void qmp_block_job_pause(const char *device, Error **errp)
1795 BlockJob *job = find_block_job(device);
1798 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1802 trace_qmp_block_job_pause(job);
1803 block_job_pause(job);
1806 void qmp_block_job_resume(const char *device, Error **errp)
1808 BlockJob *job = find_block_job(device);
1811 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1815 trace_qmp_block_job_resume(job);
1816 block_job_resume(job);
1819 void qmp_block_job_complete(const char *device, Error **errp)
1821 BlockJob *job = find_block_job(device);
1824 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1828 trace_qmp_block_job_complete(job);
1829 block_job_complete(job, errp);
1832 static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs)
1834 BlockJobInfoList **prev = opaque;
1835 BlockJob *job = bs->job;
1838 BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
1839 elem->value = block_job_query(bs->job);
1840 (*prev)->next = elem;
1845 BlockJobInfoList *qmp_query_block_jobs(Error **errp)
1847 /* Dummy is a fake list element for holding the head pointer */
1848 BlockJobInfoList dummy = {};
1849 BlockJobInfoList *prev = &dummy;
1850 bdrv_iterate(do_qmp_query_block_jobs_one, &prev);
1854 QemuOptsList qemu_common_drive_opts = {
1856 .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
1860 .type = QEMU_OPT_NUMBER,
1861 .help = "bus number",
1864 .type = QEMU_OPT_NUMBER,
1865 .help = "unit number (i.e. lun for scsi)",
1868 .type = QEMU_OPT_STRING,
1869 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
1872 .type = QEMU_OPT_NUMBER,
1873 .help = "index number",
1876 .type = QEMU_OPT_NUMBER,
1877 .help = "number of cylinders (ide disk geometry)",
1880 .type = QEMU_OPT_NUMBER,
1881 .help = "number of heads (ide disk geometry)",
1884 .type = QEMU_OPT_NUMBER,
1885 .help = "number of sectors (ide disk geometry)",
1888 .type = QEMU_OPT_STRING,
1889 .help = "chs translation (auto, lba. none)",
1892 .type = QEMU_OPT_STRING,
1893 .help = "media type (disk, cdrom)",
1896 .type = QEMU_OPT_BOOL,
1897 .help = "enable/disable snapshot mode",
1900 .type = QEMU_OPT_STRING,
1901 .help = "disk image",
1904 .type = QEMU_OPT_STRING,
1905 .help = "discard operation (ignore/off, unmap/on)",
1907 .name = "cache.writeback",
1908 .type = QEMU_OPT_BOOL,
1909 .help = "enables writeback mode for any caches",
1911 .name = "cache.direct",
1912 .type = QEMU_OPT_BOOL,
1913 .help = "enables use of O_DIRECT (bypass the host page cache)",
1915 .name = "cache.no-flush",
1916 .type = QEMU_OPT_BOOL,
1917 .help = "ignore any flush requests for the device",
1920 .type = QEMU_OPT_STRING,
1921 .help = "host AIO implementation (threads, native)",
1924 .type = QEMU_OPT_STRING,
1925 .help = "disk format (raw, qcow2, ...)",
1928 .type = QEMU_OPT_STRING,
1929 .help = "disk serial number",
1932 .type = QEMU_OPT_STRING,
1933 .help = "read error action",
1936 .type = QEMU_OPT_STRING,
1937 .help = "write error action",
1940 .type = QEMU_OPT_STRING,
1941 .help = "pci address (virtio only)",
1943 .name = "read-only",
1944 .type = QEMU_OPT_BOOL,
1945 .help = "open drive file as read-only",
1947 .name = "throttling.iops-total",
1948 .type = QEMU_OPT_NUMBER,
1949 .help = "limit total I/O operations per second",
1951 .name = "throttling.iops-read",
1952 .type = QEMU_OPT_NUMBER,
1953 .help = "limit read operations per second",
1955 .name = "throttling.iops-write",
1956 .type = QEMU_OPT_NUMBER,
1957 .help = "limit write operations per second",
1959 .name = "throttling.bps-total",
1960 .type = QEMU_OPT_NUMBER,
1961 .help = "limit total bytes per second",
1963 .name = "throttling.bps-read",
1964 .type = QEMU_OPT_NUMBER,
1965 .help = "limit read bytes per second",
1967 .name = "throttling.bps-write",
1968 .type = QEMU_OPT_NUMBER,
1969 .help = "limit write bytes per second",
1971 .name = "copy-on-read",
1972 .type = QEMU_OPT_BOOL,
1973 .help = "copy read data from backing file into image file",
1976 .type = QEMU_OPT_BOOL,
1977 .help = "(deprecated, ignored)",
1979 { /* end of list */ }
1983 QemuOptsList qemu_drive_opts = {
1985 .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
1988 * no elements => accept any params
1989 * validation will happen later
1991 { /* end of list */ }