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;
343 translation = BIOS_ATA_TRANSLATION_AUTO;
346 /* Check common options by copying from all_opts to opts, all other options
347 * are stored in bs_opts. */
348 id = qemu_opts_id(all_opts);
349 opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
350 if (error_is_set(&error)) {
351 qerror_report_err(error);
356 bs_opts = qdict_new();
357 qemu_opts_to_qdict(all_opts, bs_opts);
358 qemu_opts_absorb_qdict(opts, bs_opts, &error);
359 if (error_is_set(&error)) {
360 qerror_report_err(error);
366 qdict_del(bs_opts, "id");
369 has_driver_specific_opts = !!qdict_size(bs_opts);
371 /* extract parameters */
372 bus_id = qemu_opt_get_number(opts, "bus", 0);
373 unit_id = qemu_opt_get_number(opts, "unit", -1);
374 index = qemu_opt_get_number(opts, "index", -1);
376 cyls = qemu_opt_get_number(opts, "cyls", 0);
377 heads = qemu_opt_get_number(opts, "heads", 0);
378 secs = qemu_opt_get_number(opts, "secs", 0);
380 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
381 ro = qemu_opt_get_bool(opts, "read-only", 0);
382 copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false);
384 file = qemu_opt_get(opts, "file");
385 serial = qemu_opt_get(opts, "serial");
387 if ((buf = qemu_opt_get(opts, "if")) != NULL) {
388 for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++)
390 if (type == IF_COUNT) {
391 error_report("unsupported bus type '%s'", buf);
395 type = block_default_type;
398 max_devs = if_max_devs[type];
400 if (cyls || heads || secs) {
402 error_report("invalid physical cyls number");
406 error_report("invalid physical heads number");
410 error_report("invalid physical secs number");
415 if ((buf = qemu_opt_get(opts, "trans")) != NULL) {
417 error_report("'%s' trans must be used with cyls, heads and secs",
421 if (!strcmp(buf, "none"))
422 translation = BIOS_ATA_TRANSLATION_NONE;
423 else if (!strcmp(buf, "lba"))
424 translation = BIOS_ATA_TRANSLATION_LBA;
425 else if (!strcmp(buf, "auto"))
426 translation = BIOS_ATA_TRANSLATION_AUTO;
428 error_report("'%s' invalid translation type", buf);
433 if ((buf = qemu_opt_get(opts, "media")) != NULL) {
434 if (!strcmp(buf, "disk")) {
436 } else if (!strcmp(buf, "cdrom")) {
437 if (cyls || secs || heads) {
438 error_report("CHS can't be set with media=%s", buf);
443 error_report("'%s' invalid media", buf);
448 if ((buf = qemu_opt_get(opts, "discard")) != NULL) {
449 if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) {
450 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 qdict_put(bs_opts, "driver", qstring_from_str(buf));
490 /* disk I/O throttling */
491 io_limits.bps[BLOCK_IO_LIMIT_TOTAL] =
492 qemu_opt_get_number(opts, "throttling.bps-total", 0);
493 io_limits.bps[BLOCK_IO_LIMIT_READ] =
494 qemu_opt_get_number(opts, "throttling.bps-read", 0);
495 io_limits.bps[BLOCK_IO_LIMIT_WRITE] =
496 qemu_opt_get_number(opts, "throttling.bps-write", 0);
497 io_limits.iops[BLOCK_IO_LIMIT_TOTAL] =
498 qemu_opt_get_number(opts, "throttling.iops-total", 0);
499 io_limits.iops[BLOCK_IO_LIMIT_READ] =
500 qemu_opt_get_number(opts, "throttling.iops-read", 0);
501 io_limits.iops[BLOCK_IO_LIMIT_WRITE] =
502 qemu_opt_get_number(opts, "throttling.iops-write", 0);
504 if (!do_check_io_limits(&io_limits, &error)) {
505 error_report("%s", error_get_pretty(error));
510 if (qemu_opt_get(opts, "boot") != NULL) {
511 fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
512 "ignored. Future versions will reject this parameter. Please "
513 "update your scripts.\n");
516 on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
517 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
518 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
519 error_report("werror is not supported by this bus type");
523 on_write_error = parse_block_error_action(buf, 0);
524 if (on_write_error < 0) {
529 on_read_error = BLOCKDEV_ON_ERROR_REPORT;
530 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
531 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
532 error_report("rerror is not supported by this bus type");
536 on_read_error = parse_block_error_action(buf, 1);
537 if (on_read_error < 0) {
542 if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) {
543 if (type != IF_VIRTIO) {
544 error_report("addr is not supported by this bus type");
549 /* compute bus and unit according index */
552 if (bus_id != 0 || unit_id != -1) {
553 error_report("index cannot be used with bus and unit");
556 bus_id = drive_index_to_bus_id(type, index);
557 unit_id = drive_index_to_unit_id(type, index);
560 /* if user doesn't specify a unit_id,
561 * try to find the first free
566 while (drive_get(type, bus_id, unit_id) != NULL) {
568 if (max_devs && unit_id >= max_devs) {
577 if (max_devs && unit_id >= max_devs) {
578 error_report("unit %d too big (max is %d)",
579 unit_id, max_devs - 1);
584 * catch multiple definitions
587 if (drive_get(type, bus_id, unit_id) != NULL) {
588 error_report("drive with bus=%d, unit=%d (index=%d) exists",
589 bus_id, unit_id, index);
595 dinfo = g_malloc0(sizeof(*dinfo));
596 if ((buf = qemu_opts_id(opts)) != NULL) {
597 dinfo->id = g_strdup(buf);
599 /* no id supplied -> create one */
600 dinfo->id = g_malloc0(32);
601 if (type == IF_IDE || type == IF_SCSI)
602 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
604 snprintf(dinfo->id, 32, "%s%i%s%i",
605 if_name[type], bus_id, mediastr, unit_id);
607 snprintf(dinfo->id, 32, "%s%s%i",
608 if_name[type], mediastr, unit_id);
610 dinfo->bdrv = bdrv_new(dinfo->id);
611 dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
612 dinfo->bdrv->read_only = ro;
613 dinfo->devaddr = devaddr;
616 dinfo->unit = unit_id;
618 dinfo->heads = heads;
620 dinfo->trans = translation;
621 dinfo->opts = all_opts;
623 if (serial != NULL) {
624 dinfo->serial = g_strdup(serial);
626 QTAILQ_INSERT_TAIL(&drives, dinfo, next);
628 bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error);
630 /* disk I/O throttling */
631 bdrv_set_io_limits(dinfo->bdrv, &io_limits);
638 dinfo->media_cd = media == MEDIA_CDROM;
647 /* add virtio block device */
649 devopts = qemu_opts_create_nofail(qemu_find_opts("device"));
650 if (arch_type == QEMU_ARCH_S390X) {
651 qemu_opt_set(devopts, "driver", "virtio-blk-s390");
653 qemu_opt_set(devopts, "driver", "virtio-blk-pci");
655 qemu_opt_set(devopts, "drive", dinfo->id);
657 qemu_opt_set(devopts, "addr", devaddr);
663 if (!file || !*file) {
664 if (has_driver_specific_opts) {
671 /* always use cache=unsafe with snapshot */
672 bdrv_flags &= ~BDRV_O_CACHE_MASK;
673 bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
677 bdrv_flags |= BDRV_O_COPY_ON_READ;
680 if (runstate_check(RUN_STATE_INMIGRATE)) {
681 bdrv_flags |= BDRV_O_INCOMING;
684 if (media == MEDIA_CDROM) {
685 /* CDROM is fine for any interface, don't check. */
687 } else if (ro == 1) {
688 if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY &&
689 type != IF_NONE && type != IF_PFLASH) {
690 error_report("read-only not supported by this bus type");
695 bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
697 if (ro && copy_on_read) {
698 error_report("warning: disabling copy_on_read on read-only drive");
702 ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, NULL);
705 if (ret == -EMEDIUMTYPE) {
706 error_report("could not open disk image %s: not in %s format",
707 file ?: dinfo->id, qdict_get_str(bs_opts, "driver"));
709 error_report("could not open disk image %s: %s",
710 file ?: dinfo->id, strerror(-ret));
715 if (bdrv_key_required(dinfo->bdrv))
726 bdrv_delete(dinfo->bdrv);
728 QTAILQ_REMOVE(&drives, dinfo, next);
733 static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to)
737 value = qemu_opt_get(opts, from);
739 qemu_opt_set(opts, to, value);
740 qemu_opt_unset(opts, from);
744 DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)
748 /* Change legacy command line options into QMP ones */
749 qemu_opt_rename(all_opts, "iops", "throttling.iops-total");
750 qemu_opt_rename(all_opts, "iops_rd", "throttling.iops-read");
751 qemu_opt_rename(all_opts, "iops_wr", "throttling.iops-write");
753 qemu_opt_rename(all_opts, "bps", "throttling.bps-total");
754 qemu_opt_rename(all_opts, "bps_rd", "throttling.bps-read");
755 qemu_opt_rename(all_opts, "bps_wr", "throttling.bps-write");
757 qemu_opt_rename(all_opts, "readonly", "read-only");
759 value = qemu_opt_get(all_opts, "cache");
763 if (bdrv_parse_cache_flags(value, &flags) != 0) {
764 error_report("invalid cache option");
768 /* Specific options take precedence */
769 if (!qemu_opt_get(all_opts, "cache.writeback")) {
770 qemu_opt_set_bool(all_opts, "cache.writeback",
771 !!(flags & BDRV_O_CACHE_WB));
773 if (!qemu_opt_get(all_opts, "cache.direct")) {
774 qemu_opt_set_bool(all_opts, "cache.direct",
775 !!(flags & BDRV_O_NOCACHE));
777 if (!qemu_opt_get(all_opts, "cache.no-flush")) {
778 qemu_opt_set_bool(all_opts, "cache.no-flush",
779 !!(flags & BDRV_O_NO_FLUSH));
781 qemu_opt_unset(all_opts, "cache");
784 return blockdev_init(all_opts, block_default_type);
787 void do_commit(Monitor *mon, const QDict *qdict)
789 const char *device = qdict_get_str(qdict, "device");
790 BlockDriverState *bs;
793 if (!strcmp(device, "all")) {
794 ret = bdrv_commit_all();
796 bs = bdrv_find(device);
798 monitor_printf(mon, "Device '%s' not found\n", device);
801 ret = bdrv_commit(bs);
804 monitor_printf(mon, "'commit' error for '%s': %s\n", device,
809 static void blockdev_do_action(int kind, void *data, Error **errp)
811 TransactionAction action;
812 TransactionActionList list;
816 list.value = &action;
818 qmp_transaction(&list, errp);
821 void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file,
822 bool has_format, const char *format,
823 bool has_mode, enum NewImageMode mode,
826 BlockdevSnapshot snapshot = {
827 .device = (char *) device,
828 .snapshot_file = (char *) snapshot_file,
829 .has_format = has_format,
830 .format = (char *) format,
831 .has_mode = has_mode,
834 blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
839 /* New and old BlockDriverState structs for group snapshots */
841 typedef struct BlkTransactionState BlkTransactionState;
843 /* Only prepare() may fail. In a single transaction, only one of commit() or
844 abort() will be called, clean() will always be called if it present. */
845 typedef struct BdrvActionOps {
846 /* Size of state struct, in bytes. */
847 size_t instance_size;
848 /* Prepare the work, must NOT be NULL. */
849 void (*prepare)(BlkTransactionState *common, Error **errp);
850 /* Commit the changes, can be NULL. */
851 void (*commit)(BlkTransactionState *common);
852 /* Abort the changes on fail, can be NULL. */
853 void (*abort)(BlkTransactionState *common);
854 /* Clean up resource in the end, can be NULL. */
855 void (*clean)(BlkTransactionState *common);
859 * This structure must be arranged as first member in child type, assuming
860 * that compiler will also arrange it to the same address with parent instance.
861 * Later it will be used in free().
863 struct BlkTransactionState {
864 TransactionAction *action;
865 const BdrvActionOps *ops;
866 QSIMPLEQ_ENTRY(BlkTransactionState) entry;
869 /* external snapshot private data */
870 typedef struct ExternalSnapshotState {
871 BlkTransactionState common;
872 BlockDriverState *old_bs;
873 BlockDriverState *new_bs;
874 } ExternalSnapshotState;
876 static void external_snapshot_prepare(BlkTransactionState *common,
881 Error *local_err = NULL;
883 const char *new_image_file;
884 const char *format = "qcow2";
885 enum NewImageMode mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
886 ExternalSnapshotState *state =
887 DO_UPCAST(ExternalSnapshotState, common, common);
888 TransactionAction *action = common->action;
891 g_assert(action->kind == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC);
893 device = action->blockdev_snapshot_sync->device;
894 new_image_file = action->blockdev_snapshot_sync->snapshot_file;
895 if (action->blockdev_snapshot_sync->has_format) {
896 format = action->blockdev_snapshot_sync->format;
898 if (action->blockdev_snapshot_sync->has_mode) {
899 mode = action->blockdev_snapshot_sync->mode;
902 /* start processing */
903 drv = bdrv_find_format(format);
905 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
909 state->old_bs = bdrv_find(device);
910 if (!state->old_bs) {
911 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
915 if (!bdrv_is_inserted(state->old_bs)) {
916 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
920 if (bdrv_in_use(state->old_bs)) {
921 error_set(errp, QERR_DEVICE_IN_USE, device);
925 if (!bdrv_is_read_only(state->old_bs)) {
926 if (bdrv_flush(state->old_bs)) {
927 error_set(errp, QERR_IO_ERROR);
932 flags = state->old_bs->open_flags;
934 /* create new image w/backing file */
935 if (mode != NEW_IMAGE_MODE_EXISTING) {
936 bdrv_img_create(new_image_file, format,
937 state->old_bs->filename,
938 state->old_bs->drv->format_name,
939 NULL, -1, flags, &local_err, false);
940 if (error_is_set(&local_err)) {
941 error_propagate(errp, local_err);
946 /* We will manually add the backing_hd field to the bs later */
947 state->new_bs = bdrv_new("");
948 /* TODO Inherit bs->options or only take explicit options with an
949 * extended QMP command? */
950 ret = bdrv_open(state->new_bs, new_image_file, NULL,
951 flags | BDRV_O_NO_BACKING, drv);
953 error_setg_file_open(errp, -ret, new_image_file);
957 static void external_snapshot_commit(BlkTransactionState *common)
959 ExternalSnapshotState *state =
960 DO_UPCAST(ExternalSnapshotState, common, common);
962 /* This removes our old bs and adds the new bs */
963 bdrv_append(state->new_bs, state->old_bs);
964 /* We don't need (or want) to use the transactional
965 * bdrv_reopen_multiple() across all the entries at once, because we
966 * don't want to abort all of them if one of them fails the reopen */
967 bdrv_reopen(state->new_bs, state->new_bs->open_flags & ~BDRV_O_RDWR,
971 static void external_snapshot_abort(BlkTransactionState *common)
973 ExternalSnapshotState *state =
974 DO_UPCAST(ExternalSnapshotState, common, common);
976 bdrv_delete(state->new_bs);
980 typedef struct DriveBackupState {
981 BlkTransactionState common;
982 BlockDriverState *bs;
986 static void drive_backup_prepare(BlkTransactionState *common, Error **errp)
988 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
990 Error *local_err = NULL;
992 assert(common->action->kind == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
993 backup = common->action->drive_backup;
995 qmp_drive_backup(backup->device, backup->target,
996 backup->has_format, backup->format,
998 backup->has_mode, backup->mode,
999 backup->has_speed, backup->speed,
1000 backup->has_on_source_error, backup->on_source_error,
1001 backup->has_on_target_error, backup->on_target_error,
1003 if (error_is_set(&local_err)) {
1004 error_propagate(errp, local_err);
1010 state->bs = bdrv_find(backup->device);
1011 state->job = state->bs->job;
1014 static void drive_backup_abort(BlkTransactionState *common)
1016 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1017 BlockDriverState *bs = state->bs;
1019 /* Only cancel if it's the job we started */
1020 if (bs && bs->job && bs->job == state->job) {
1021 block_job_cancel_sync(bs->job);
1025 static void abort_prepare(BlkTransactionState *common, Error **errp)
1027 error_setg(errp, "Transaction aborted using Abort action");
1030 static void abort_commit(BlkTransactionState *common)
1032 g_assert_not_reached(); /* this action never succeeds */
1035 static const BdrvActionOps actions[] = {
1036 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
1037 .instance_size = sizeof(ExternalSnapshotState),
1038 .prepare = external_snapshot_prepare,
1039 .commit = external_snapshot_commit,
1040 .abort = external_snapshot_abort,
1042 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
1043 .instance_size = sizeof(DriveBackupState),
1044 .prepare = drive_backup_prepare,
1045 .abort = drive_backup_abort,
1047 [TRANSACTION_ACTION_KIND_ABORT] = {
1048 .instance_size = sizeof(BlkTransactionState),
1049 .prepare = abort_prepare,
1050 .commit = abort_commit,
1055 * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
1056 * then we do not pivot any of the devices in the group, and abandon the
1059 void qmp_transaction(TransactionActionList *dev_list, Error **errp)
1061 TransactionActionList *dev_entry = dev_list;
1062 BlkTransactionState *state, *next;
1063 Error *local_err = NULL;
1065 QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionState) snap_bdrv_states;
1066 QSIMPLEQ_INIT(&snap_bdrv_states);
1068 /* drain all i/o before any snapshots */
1071 /* We don't do anything in this loop that commits us to the snapshot */
1072 while (NULL != dev_entry) {
1073 TransactionAction *dev_info = NULL;
1074 const BdrvActionOps *ops;
1076 dev_info = dev_entry->value;
1077 dev_entry = dev_entry->next;
1079 assert(dev_info->kind < ARRAY_SIZE(actions));
1081 ops = &actions[dev_info->kind];
1082 state = g_malloc0(ops->instance_size);
1084 state->action = dev_info;
1085 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
1087 state->ops->prepare(state, &local_err);
1088 if (error_is_set(&local_err)) {
1089 error_propagate(errp, local_err);
1090 goto delete_and_fail;
1094 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
1095 if (state->ops->commit) {
1096 state->ops->commit(state);
1105 * failure, and it is all-or-none; abandon each new bs, and keep using
1106 * the original bs for all images
1108 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
1109 if (state->ops->abort) {
1110 state->ops->abort(state);
1114 QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
1115 if (state->ops->clean) {
1116 state->ops->clean(state);
1123 static void eject_device(BlockDriverState *bs, int force, Error **errp)
1125 if (bdrv_in_use(bs)) {
1126 error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs));
1129 if (!bdrv_dev_has_removable_media(bs)) {
1130 error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs));
1134 if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) {
1135 bdrv_dev_eject_request(bs, force);
1137 error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs));
1145 void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
1147 BlockDriverState *bs;
1149 bs = bdrv_find(device);
1151 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1155 eject_device(bs, force, errp);
1158 void qmp_block_passwd(const char *device, const char *password, Error **errp)
1160 BlockDriverState *bs;
1163 bs = bdrv_find(device);
1165 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1169 err = bdrv_set_key(bs, password);
1170 if (err == -EINVAL) {
1171 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
1173 } else if (err < 0) {
1174 error_set(errp, QERR_INVALID_PASSWORD);
1179 static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename,
1180 int bdrv_flags, BlockDriver *drv,
1181 const char *password, Error **errp)
1185 ret = bdrv_open(bs, filename, NULL, bdrv_flags, drv);
1187 error_setg_file_open(errp, -ret, filename);
1191 if (bdrv_key_required(bs)) {
1193 if (bdrv_set_key(bs, password) < 0) {
1194 error_set(errp, QERR_INVALID_PASSWORD);
1197 error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs),
1198 bdrv_get_encrypted_filename(bs));
1200 } else if (password) {
1201 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
1205 void qmp_change_blockdev(const char *device, const char *filename,
1206 bool has_format, const char *format, Error **errp)
1208 BlockDriverState *bs;
1209 BlockDriver *drv = NULL;
1213 bs = bdrv_find(device);
1215 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1220 drv = bdrv_find_whitelisted_format(format, bs->read_only);
1222 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1227 eject_device(bs, 0, &err);
1228 if (error_is_set(&err)) {
1229 error_propagate(errp, err);
1233 bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
1234 bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
1236 qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
1239 /* throttling disk I/O limits */
1240 void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
1241 int64_t bps_wr, int64_t iops, int64_t iops_rd,
1242 int64_t iops_wr, Error **errp)
1244 BlockIOLimit io_limits;
1245 BlockDriverState *bs;
1247 bs = bdrv_find(device);
1249 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1253 io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = bps;
1254 io_limits.bps[BLOCK_IO_LIMIT_READ] = bps_rd;
1255 io_limits.bps[BLOCK_IO_LIMIT_WRITE] = bps_wr;
1256 io_limits.iops[BLOCK_IO_LIMIT_TOTAL]= iops;
1257 io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd;
1258 io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr;
1260 if (!do_check_io_limits(&io_limits, errp)) {
1264 bs->io_limits = io_limits;
1266 if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) {
1267 bdrv_io_limits_enable(bs);
1268 } else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) {
1269 bdrv_io_limits_disable(bs);
1271 if (bs->block_timer) {
1272 qemu_mod_timer(bs->block_timer, qemu_get_clock_ns(vm_clock));
1277 int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
1279 const char *id = qdict_get_str(qdict, "id");
1280 BlockDriverState *bs;
1284 qerror_report(QERR_DEVICE_NOT_FOUND, id);
1287 if (bdrv_in_use(bs)) {
1288 qerror_report(QERR_DEVICE_IN_USE, id);
1292 /* quiesce block driver; prevent further io */
1297 /* if we have a device attached to this BlockDriverState
1298 * then we need to make the drive anonymous until the device
1299 * can be removed. If this is a drive with no device backing
1300 * then we can just get rid of the block driver state right here.
1302 if (bdrv_get_attached_dev(bs)) {
1305 /* Further I/O must not pause the guest */
1306 bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT,
1307 BLOCKDEV_ON_ERROR_REPORT);
1309 drive_uninit(drive_get_by_blockdev(bs));
1315 void qmp_block_resize(const char *device, int64_t size, Error **errp)
1317 BlockDriverState *bs;
1320 bs = bdrv_find(device);
1322 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1327 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
1331 /* complete all in-flight operations before resizing the device */
1334 ret = bdrv_truncate(bs, size);
1339 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1342 error_set(errp, QERR_UNSUPPORTED);
1345 error_set(errp, QERR_DEVICE_IS_READ_ONLY, device);
1348 error_set(errp, QERR_DEVICE_IN_USE, device);
1351 error_setg_errno(errp, -ret, "Could not resize");
1356 static void block_job_cb(void *opaque, int ret)
1358 BlockDriverState *bs = opaque;
1361 trace_block_job_cb(bs, bs->job, ret);
1364 obj = qobject_from_block_job(bs->job);
1366 QDict *dict = qobject_to_qdict(obj);
1367 qdict_put(dict, "error", qstring_from_str(strerror(-ret)));
1370 if (block_job_is_cancelled(bs->job)) {
1371 monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj);
1373 monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj);
1375 qobject_decref(obj);
1377 drive_put_ref_bh_schedule(drive_get_by_blockdev(bs));
1380 void qmp_block_stream(const char *device, bool has_base,
1381 const char *base, bool has_speed, int64_t speed,
1382 bool has_on_error, BlockdevOnError on_error,
1385 BlockDriverState *bs;
1386 BlockDriverState *base_bs = NULL;
1387 Error *local_err = NULL;
1389 if (!has_on_error) {
1390 on_error = BLOCKDEV_ON_ERROR_REPORT;
1393 bs = bdrv_find(device);
1395 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1400 base_bs = bdrv_find_backing_image(bs, base);
1401 if (base_bs == NULL) {
1402 error_set(errp, QERR_BASE_NOT_FOUND, base);
1407 stream_start(bs, base_bs, base, has_speed ? speed : 0,
1408 on_error, block_job_cb, bs, &local_err);
1409 if (error_is_set(&local_err)) {
1410 error_propagate(errp, local_err);
1414 /* Grab a reference so hotplug does not delete the BlockDriverState from
1417 drive_get_ref(drive_get_by_blockdev(bs));
1419 trace_qmp_block_stream(bs, bs->job);
1422 void qmp_block_commit(const char *device,
1423 bool has_base, const char *base, const char *top,
1424 bool has_speed, int64_t speed,
1427 BlockDriverState *bs;
1428 BlockDriverState *base_bs, *top_bs;
1429 Error *local_err = NULL;
1430 /* This will be part of the QMP command, if/when the
1431 * BlockdevOnError change for blkmirror makes it in
1433 BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
1435 /* drain all i/o before commits */
1438 bs = bdrv_find(device);
1440 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1444 /* default top_bs is the active layer */
1448 if (strcmp(bs->filename, top) != 0) {
1449 top_bs = bdrv_find_backing_image(bs, top);
1453 if (top_bs == NULL) {
1454 error_setg(errp, "Top image file %s not found", top ? top : "NULL");
1458 if (has_base && base) {
1459 base_bs = bdrv_find_backing_image(top_bs, base);
1461 base_bs = bdrv_find_base(top_bs);
1464 if (base_bs == NULL) {
1465 error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
1469 commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs,
1471 if (local_err != NULL) {
1472 error_propagate(errp, local_err);
1475 /* Grab a reference so hotplug does not delete the BlockDriverState from
1478 drive_get_ref(drive_get_by_blockdev(bs));
1481 void qmp_drive_backup(const char *device, const char *target,
1482 bool has_format, const char *format,
1483 enum MirrorSyncMode sync,
1484 bool has_mode, enum NewImageMode mode,
1485 bool has_speed, int64_t speed,
1486 bool has_on_source_error, BlockdevOnError on_source_error,
1487 bool has_on_target_error, BlockdevOnError on_target_error,
1490 BlockDriverState *bs;
1491 BlockDriverState *target_bs;
1492 BlockDriverState *source = NULL;
1493 BlockDriver *drv = NULL;
1494 Error *local_err = NULL;
1502 if (!has_on_source_error) {
1503 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
1505 if (!has_on_target_error) {
1506 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
1509 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1512 bs = bdrv_find(device);
1514 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1518 if (!bdrv_is_inserted(bs)) {
1519 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1524 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
1527 drv = bdrv_find_format(format);
1529 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1534 if (bdrv_in_use(bs)) {
1535 error_set(errp, QERR_DEVICE_IN_USE, device);
1539 flags = bs->open_flags | BDRV_O_RDWR;
1541 /* See if we have a backing HD we can use to create our new image
1543 if (sync == MIRROR_SYNC_MODE_TOP) {
1544 source = bs->backing_hd;
1546 sync = MIRROR_SYNC_MODE_FULL;
1549 if (sync == MIRROR_SYNC_MODE_NONE) {
1553 size = bdrv_getlength(bs);
1555 error_setg_errno(errp, -size, "bdrv_getlength failed");
1559 if (mode != NEW_IMAGE_MODE_EXISTING) {
1560 assert(format && drv);
1562 bdrv_img_create(target, format, source->filename,
1563 source->drv->format_name, NULL,
1564 size, flags, &local_err, false);
1566 bdrv_img_create(target, format, NULL, NULL, NULL,
1567 size, flags, &local_err, false);
1571 if (error_is_set(&local_err)) {
1572 error_propagate(errp, local_err);
1576 target_bs = bdrv_new("");
1577 ret = bdrv_open(target_bs, target, NULL, flags, drv);
1579 bdrv_delete(target_bs);
1580 error_setg_file_open(errp, -ret, target);
1584 backup_start(bs, target_bs, speed, sync, on_source_error, on_target_error,
1585 block_job_cb, bs, &local_err);
1586 if (local_err != NULL) {
1587 bdrv_delete(target_bs);
1588 error_propagate(errp, local_err);
1592 /* Grab a reference so hotplug does not delete the BlockDriverState from
1595 drive_get_ref(drive_get_by_blockdev(bs));
1598 #define DEFAULT_MIRROR_BUF_SIZE (10 << 20)
1600 void qmp_drive_mirror(const char *device, const char *target,
1601 bool has_format, const char *format,
1602 enum MirrorSyncMode sync,
1603 bool has_mode, enum NewImageMode mode,
1604 bool has_speed, int64_t speed,
1605 bool has_granularity, uint32_t granularity,
1606 bool has_buf_size, int64_t buf_size,
1607 bool has_on_source_error, BlockdevOnError on_source_error,
1608 bool has_on_target_error, BlockdevOnError on_target_error,
1611 BlockDriverState *bs;
1612 BlockDriverState *source, *target_bs;
1613 BlockDriver *drv = NULL;
1614 Error *local_err = NULL;
1622 if (!has_on_source_error) {
1623 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
1625 if (!has_on_target_error) {
1626 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
1629 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1631 if (!has_granularity) {
1634 if (!has_buf_size) {
1635 buf_size = DEFAULT_MIRROR_BUF_SIZE;
1638 if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
1639 error_set(errp, QERR_INVALID_PARAMETER, device);
1642 if (granularity & (granularity - 1)) {
1643 error_set(errp, QERR_INVALID_PARAMETER, device);
1647 bs = bdrv_find(device);
1649 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1653 if (!bdrv_is_inserted(bs)) {
1654 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1659 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
1662 drv = bdrv_find_format(format);
1664 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1669 if (bdrv_in_use(bs)) {
1670 error_set(errp, QERR_DEVICE_IN_USE, device);
1674 flags = bs->open_flags | BDRV_O_RDWR;
1675 source = bs->backing_hd;
1676 if (!source && sync == MIRROR_SYNC_MODE_TOP) {
1677 sync = MIRROR_SYNC_MODE_FULL;
1680 size = bdrv_getlength(bs);
1682 error_setg_errno(errp, -size, "bdrv_getlength failed");
1686 if (sync == MIRROR_SYNC_MODE_FULL && mode != NEW_IMAGE_MODE_EXISTING) {
1687 /* create new image w/o backing file */
1688 assert(format && drv);
1689 bdrv_img_create(target, format,
1690 NULL, NULL, NULL, size, flags, &local_err, false);
1693 case NEW_IMAGE_MODE_EXISTING:
1696 case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
1697 /* create new image with backing file */
1698 bdrv_img_create(target, format,
1700 source->drv->format_name,
1701 NULL, size, flags, &local_err, false);
1708 if (error_is_set(&local_err)) {
1709 error_propagate(errp, local_err);
1713 /* Mirroring takes care of copy-on-write using the source's backing
1716 target_bs = bdrv_new("");
1717 ret = bdrv_open(target_bs, target, NULL, flags | BDRV_O_NO_BACKING, drv);
1719 bdrv_delete(target_bs);
1720 error_setg_file_open(errp, -ret, target);
1724 mirror_start(bs, target_bs, speed, granularity, buf_size, sync,
1725 on_source_error, on_target_error,
1726 block_job_cb, bs, &local_err);
1727 if (local_err != NULL) {
1728 bdrv_delete(target_bs);
1729 error_propagate(errp, local_err);
1733 /* Grab a reference so hotplug does not delete the BlockDriverState from
1736 drive_get_ref(drive_get_by_blockdev(bs));
1739 static BlockJob *find_block_job(const char *device)
1741 BlockDriverState *bs;
1743 bs = bdrv_find(device);
1744 if (!bs || !bs->job) {
1750 void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
1752 BlockJob *job = find_block_job(device);
1755 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1759 block_job_set_speed(job, speed, errp);
1762 void qmp_block_job_cancel(const char *device,
1763 bool has_force, bool force, Error **errp)
1765 BlockJob *job = find_block_job(device);
1772 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1775 if (job->paused && !force) {
1776 error_set(errp, QERR_BLOCK_JOB_PAUSED, device);
1780 trace_qmp_block_job_cancel(job);
1781 block_job_cancel(job);
1784 void qmp_block_job_pause(const char *device, Error **errp)
1786 BlockJob *job = find_block_job(device);
1789 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1793 trace_qmp_block_job_pause(job);
1794 block_job_pause(job);
1797 void qmp_block_job_resume(const char *device, Error **errp)
1799 BlockJob *job = find_block_job(device);
1802 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1806 trace_qmp_block_job_resume(job);
1807 block_job_resume(job);
1810 void qmp_block_job_complete(const char *device, Error **errp)
1812 BlockJob *job = find_block_job(device);
1815 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1819 trace_qmp_block_job_complete(job);
1820 block_job_complete(job, errp);
1823 static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs)
1825 BlockJobInfoList **prev = opaque;
1826 BlockJob *job = bs->job;
1829 BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
1830 elem->value = block_job_query(bs->job);
1831 (*prev)->next = elem;
1836 BlockJobInfoList *qmp_query_block_jobs(Error **errp)
1838 /* Dummy is a fake list element for holding the head pointer */
1839 BlockJobInfoList dummy = {};
1840 BlockJobInfoList *prev = &dummy;
1841 bdrv_iterate(do_qmp_query_block_jobs_one, &prev);
1845 QemuOptsList qemu_common_drive_opts = {
1847 .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
1851 .type = QEMU_OPT_NUMBER,
1852 .help = "bus number",
1855 .type = QEMU_OPT_NUMBER,
1856 .help = "unit number (i.e. lun for scsi)",
1859 .type = QEMU_OPT_STRING,
1860 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
1863 .type = QEMU_OPT_NUMBER,
1864 .help = "index number",
1867 .type = QEMU_OPT_NUMBER,
1868 .help = "number of cylinders (ide disk geometry)",
1871 .type = QEMU_OPT_NUMBER,
1872 .help = "number of heads (ide disk geometry)",
1875 .type = QEMU_OPT_NUMBER,
1876 .help = "number of sectors (ide disk geometry)",
1879 .type = QEMU_OPT_STRING,
1880 .help = "chs translation (auto, lba. none)",
1883 .type = QEMU_OPT_STRING,
1884 .help = "media type (disk, cdrom)",
1887 .type = QEMU_OPT_BOOL,
1888 .help = "enable/disable snapshot mode",
1891 .type = QEMU_OPT_STRING,
1892 .help = "disk image",
1895 .type = QEMU_OPT_STRING,
1896 .help = "discard operation (ignore/off, unmap/on)",
1898 .name = "cache.writeback",
1899 .type = QEMU_OPT_BOOL,
1900 .help = "enables writeback mode for any caches",
1902 .name = "cache.direct",
1903 .type = QEMU_OPT_BOOL,
1904 .help = "enables use of O_DIRECT (bypass the host page cache)",
1906 .name = "cache.no-flush",
1907 .type = QEMU_OPT_BOOL,
1908 .help = "ignore any flush requests for the device",
1911 .type = QEMU_OPT_STRING,
1912 .help = "host AIO implementation (threads, native)",
1915 .type = QEMU_OPT_STRING,
1916 .help = "disk format (raw, qcow2, ...)",
1919 .type = QEMU_OPT_STRING,
1920 .help = "disk serial number",
1923 .type = QEMU_OPT_STRING,
1924 .help = "read error action",
1927 .type = QEMU_OPT_STRING,
1928 .help = "write error action",
1931 .type = QEMU_OPT_STRING,
1932 .help = "pci address (virtio only)",
1934 .name = "read-only",
1935 .type = QEMU_OPT_BOOL,
1936 .help = "open drive file as read-only",
1938 .name = "throttling.iops-total",
1939 .type = QEMU_OPT_NUMBER,
1940 .help = "limit total I/O operations per second",
1942 .name = "throttling.iops-read",
1943 .type = QEMU_OPT_NUMBER,
1944 .help = "limit read operations per second",
1946 .name = "throttling.iops-write",
1947 .type = QEMU_OPT_NUMBER,
1948 .help = "limit write operations per second",
1950 .name = "throttling.bps-total",
1951 .type = QEMU_OPT_NUMBER,
1952 .help = "limit total bytes per second",
1954 .name = "throttling.bps-read",
1955 .type = QEMU_OPT_NUMBER,
1956 .help = "limit read bytes per second",
1958 .name = "throttling.bps-write",
1959 .type = QEMU_OPT_NUMBER,
1960 .help = "limit write bytes per second",
1962 .name = "copy-on-read",
1963 .type = QEMU_OPT_BOOL,
1964 .help = "copy read data from backing file into image file",
1967 .type = QEMU_OPT_BOOL,
1968 .help = "(deprecated, ignored)",
1970 { /* end of list */ }
1974 QemuOptsList qemu_drive_opts = {
1976 .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
1979 * no elements => accept any params
1980 * validation will happen later
1982 { /* end of list */ }